linux/generic: sync to todays yaffs tree

SVN-Revision: 23544

1 files changed, 27120 insertions, 0 deletions

diff --git a/target/linux/generic/patches-2.6.36/511-yaffs-git-2010-10-20.patch b/target/linux/generic/patches-2.6.36/511-yaffs-git-2010-10-20.patch
new file mode 100644
index 0000000..f58c481
--- /dev/null
+++ b/target/linux/generic/patches-2.6.36/511-yaffs-git-2010-10-20.patch
@@ -0,0 +1,27120 @@
+diff -Nrup linux-2.6.36-rc8/fs/Kconfig linux-2.6.36-rc8.new/fs/Kconfig
+--- linux-2.6.36-rc8/fs/Kconfig	2010-10-20 13:11:25.295000294 +0300
++++ linux-2.6.36-rc8.new/fs/Kconfig	2010-10-20 13:28:15.952000294 +0300
+@@ -44,7 +44,6 @@ source "fs/gfs2/Kconfig"
+ source "fs/ocfs2/Kconfig"
+ source "fs/btrfs/Kconfig"
+ source "fs/nilfs2/Kconfig"
+-source "fs/yaffs2/Kconfig"
+ 
+ endif # BLOCK
+ 
+@@ -175,6 +174,10 @@ source "fs/hfsplus/Kconfig"
+ source "fs/befs/Kconfig"
+ source "fs/bfs/Kconfig"
+ source "fs/efs/Kconfig"
++
++# Patched by YAFFS
++source "fs/yaffs2/Kconfig"
++
+ source "fs/jffs2/Kconfig"
+ # UBIFS File system configuration
+ source "fs/ubifs/Kconfig"
+diff -Nrup linux-2.6.36-rc8/fs/Makefile linux-2.6.36-rc8.new/fs/Makefile
+--- linux-2.6.36-rc8/fs/Makefile	2010-10-20 13:11:25.295000294 +0300
++++ linux-2.6.36-rc8.new/fs/Makefile	2010-10-20 13:28:15.953000294 +0300
+@@ -127,5 +127,6 @@ obj-$(CONFIG_BTRFS_FS)		+= btrfs/
+ obj-$(CONFIG_GFS2_FS)           += gfs2/
+ obj-$(CONFIG_EXOFS_FS)          += exofs/
+ obj-$(CONFIG_CEPH_FS)		+= ceph/
+-obj-$(CONFIG_YAFFS_FS)		+= yaffs2/
+ 
++# Patched by YAFFS
++obj-$(CONFIG_YAFFS_FS)		+= yaffs2/
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/devextras.h linux-2.6.36-rc8.new/fs/yaffs2/devextras.h
+--- linux-2.6.36-rc8/fs/yaffs2/devextras.h	2010-10-20 13:17:58.937000294 +0300
++++ linux-2.6.36-rc8.new/fs/yaffs2/devextras.h	2010-10-20 13:28:16.050000294 +0300
+@@ -1,7 +1,7 @@
+ /*
+  * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+  *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+  *   for Toby Churchill Ltd and Brightstar Engineering
+  *
+  * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -24,6 +24,8 @@
+ #define __EXTRAS_H__
+ 
+ 
++#include "yportenv.h"
++
+ #if !(defined __KERNEL__)
+ 
+ /* Definition of types */
+@@ -33,103 +35,6 @@ typedef unsigned __u32;
+ 
+ #endif
+ 
+-/*
+- * This is a simple doubly linked list implementation that matches the
+- * way the Linux kernel doubly linked list implementation works.
+- */
+-
+-struct ylist_head {
+-	struct ylist_head *next; /* next in chain */
+-	struct ylist_head *prev; /* previous in chain */
+-};
+-
+-
+-/* Initialise a static list */
+-#define YLIST_HEAD(name) \
+-struct ylist_head name = { &(name), &(name)}
+-
+-
+-
+-/* Initialise a list head to an empty list */
+-#define YINIT_LIST_HEAD(p) \
+-do { \
+-	(p)->next = (p);\
+-	(p)->prev = (p); \
+-} while (0)
+-
+-
+-/* Add an element to a list */
+-static __inline__ void ylist_add(struct ylist_head *newEntry,
+-				struct ylist_head *list)
+-{
+-	struct ylist_head *listNext = list->next;
+-
+-	list->next = newEntry;
+-	newEntry->prev = list;
+-	newEntry->next = listNext;
+-	listNext->prev = newEntry;
+-
+-}
+-
+-static __inline__ void ylist_add_tail(struct ylist_head *newEntry,
+-				 struct ylist_head *list)
+-{
+-	struct ylist_head *listPrev = list->prev;
+-
+-	list->prev = newEntry;
+-	newEntry->next = list;
+-	newEntry->prev = listPrev;
+-	listPrev->next = newEntry;
+-
+-}
+-
+-
+-/* Take an element out of its current list, with or without
+- * reinitialising the links.of the entry*/
+-static __inline__ void ylist_del(struct ylist_head *entry)
+-{
+-	struct ylist_head *listNext = entry->next;
+-	struct ylist_head *listPrev = entry->prev;
+-
+-	listNext->prev = listPrev;
+-	listPrev->next = listNext;
+-
+-}
+-
+-static __inline__ void ylist_del_init(struct ylist_head *entry)
+-{
+-	ylist_del(entry);
+-	entry->next = entry->prev = entry;
+-}
+-
+-
+-/* Test if the list is empty */
+-static __inline__ int ylist_empty(struct ylist_head *entry)
+-{
+-	return (entry->next == entry);
+-}
+-
+-
+-/* ylist_entry takes a pointer to a list entry and offsets it to that
+- * we can find a pointer to the object it is embedded in.
+- */
+-
+-
+-#define ylist_entry(entry, type, member) \
+-	((type *)((char *)(entry)-(unsigned long)(&((type *)NULL)->member)))
+-
+-
+-/* ylist_for_each and list_for_each_safe  iterate over lists.
+- * ylist_for_each_safe uses temporary storage to make the list delete safe
+- */
+-
+-#define ylist_for_each(itervar, list) \
+-	for (itervar = (list)->next; itervar != (list); itervar = itervar->next)
+-
+-#define ylist_for_each_safe(itervar, saveVar, list) \
+-	for (itervar = (list)->next, saveVar = (list)->next->next; \
+-		itervar != (list); itervar = saveVar, saveVar = saveVar->next)
+-
+ 
+ #if !(defined __KERNEL__)
+ 
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/Kconfig linux-2.6.36-rc8.new/fs/yaffs2/Kconfig
+--- linux-2.6.36-rc8/fs/yaffs2/Kconfig	2010-10-20 13:17:58.937000294 +0300
++++ linux-2.6.36-rc8.new/fs/yaffs2/Kconfig	2010-10-20 13:28:15.993000294 +0300
+@@ -90,23 +90,15 @@ config YAFFS_AUTO_YAFFS2
+ 
+ 	  If unsure, say Y.
+ 
+-config YAFFS_DISABLE_LAZY_LOAD
+-	bool "Disable lazy loading"
+-	depends on YAFFS_YAFFS2
++config YAFFS_DISABLE_TAGS_ECC
++	bool "Disable YAFFS from doing ECC on tags by default"
++	depends on YAFFS_FS && YAFFS_YAFFS2
+ 	default n
+ 	help
+-	  "Lazy loading" defers loading file details until they are
+-	  required. This saves mount time, but makes the first look-up
+-	  a bit longer.
+-
+-	  Lazy loading will only happen if enabled by this option being 'n'
+-	  and if the appropriate tags are available, else yaffs2 will
+-	  automatically fall back to immediate loading and do the right
+-	  thing.
+-
+-	  Lazy laoding will be required by checkpointing.
+-
+-	  Setting this to 'y' will disable lazy loading.
++	  This defaults Yaffs to using its own ECC calculations on tags instead of
++	  just relying on the MTD.
++	  This behavior can also be overridden with tags_ecc_on and
++	  tags_ecc_off mount options.
+ 
+ 	  If unsure, say N.
+ 
+@@ -154,3 +146,45 @@ config YAFFS_SHORT_NAMES_IN_RAM
+ 	  but makes look-ups faster.
+ 
+ 	  If unsure, say Y.
++
++config YAFFS_EMPTY_LOST_AND_FOUND
++	bool "Empty lost and found on boot"
++	depends on YAFFS_FS
++	default n
++	help
++	  If this is enabled then the contents of lost and found is
++	  automatically dumped at mount.
++
++	  If unsure, say N.
++
++config YAFFS_DISABLE_BLOCK_REFRESHING
++	bool "Disable yaffs2 block refreshing"
++	depends on YAFFS_FS
++	default n
++	help
++	 If this is set, then block refreshing is disabled.
++	 Block refreshing infrequently refreshes the oldest block in
++	 a yaffs2 file system. This mechanism helps to refresh flash to
++	 mitigate against data loss. This is particularly useful for MLC.
++
++	  If unsure, say N.
++
++config YAFFS_DISABLE_BACKGROUND
++	bool "Disable yaffs2 background processing"
++	depends on YAFFS_FS
++	default n
++	help
++	 If this is set, then background processing is disabled.
++	 Background processing makes many foreground activities faster.
++
++	  If unsure, say N.
++
++config YAFFS_XATTR
++	bool "Enable yaffs2 xattr support"
++	depends on YAFFS_FS
++	default y
++	help
++	 If this is set then yaffs2 will provide xattr support.
++	 If unsure, say Y.
++
++
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/Makefile linux-2.6.36-rc8.new/fs/yaffs2/Makefile
+--- linux-2.6.36-rc8/fs/yaffs2/Makefile	2010-10-20 13:17:58.937000294 +0300
++++ linux-2.6.36-rc8.new/fs/yaffs2/Makefile	2010-10-20 13:28:15.989000294 +0300
+@@ -4,7 +4,14 @@
+ 
+ obj-$(CONFIG_YAFFS_FS) += yaffs.o
+ 
+-yaffs-y := yaffs_ecc.o yaffs_fs.o yaffs_guts.o yaffs_checkptrw.o
+-yaffs-y += yaffs_packedtags1.o yaffs_packedtags2.o yaffs_nand.o yaffs_qsort.o
++yaffs-y := yaffs_ecc.o yaffs_vfs_glue.o yaffs_guts.o yaffs_checkptrw.o
++yaffs-y += yaffs_packedtags1.o yaffs_packedtags2.o yaffs_nand.o
+ yaffs-y += yaffs_tagscompat.o yaffs_tagsvalidity.o
+ yaffs-y += yaffs_mtdif.o yaffs_mtdif1.o yaffs_mtdif2.o
++yaffs-y += yaffs_nameval.o
++yaffs-y += yaffs_allocator.o
++yaffs-y += yaffs_yaffs1.o
++yaffs-y += yaffs_yaffs2.o
++yaffs-y += yaffs_bitmap.o
++yaffs-y += yaffs_verify.o
++
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/moduleconfig.h linux-2.6.36-rc8.new/fs/yaffs2/moduleconfig.h
+--- linux-2.6.36-rc8/fs/yaffs2/moduleconfig.h	2010-10-20 13:17:58.938000294 +0300
++++ linux-2.6.36-rc8.new/fs/yaffs2/moduleconfig.h	2010-10-20 13:28:16.055000294 +0300
+@@ -1,7 +1,7 @@
+ /*
+  * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+  *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+  *   for Toby Churchill Ltd and Brightstar Engineering
+  *
+  * Created by Martin Fouts <Martin.Fouts@palmsource.com>
+@@ -29,25 +29,46 @@
+ /* Meaning: Yaffs does its own ECC, rather than using MTD ECC */
+ /* #define CONFIG_YAFFS_DOES_ECC */
+ 
++/* Default: Selected */
++/* Meaning: Yaffs does its own ECC on tags for packed tags rather than use mtd */
++#define CONFIG_YAFFS_DOES_TAGS_ECC
++
+ /* Default: Not selected */
+ /* Meaning: ECC byte order is 'wrong'.  Only meaningful if */
+ /*          CONFIG_YAFFS_DOES_ECC is set */
+ /* #define CONFIG_YAFFS_ECC_WRONG_ORDER */
+ 
+-/* Default: Selected */
+-/* Meaning: Disables testing whether chunks are erased before writing to them*/
+-#define CONFIG_YAFFS_DISABLE_CHUNK_ERASED_CHECK
++/* Default: Not selected */
++/* Meaning: Always test whether chunks are erased before writing to them.
++	    Use during mtd debugging and init. */
++/* #define CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED */
++
++/* Default: Not Selected */
++/* Meaning: At mount automatically empty all files from lost and found. */
++/* This is done to fix an old problem where rmdir was not checking for an */
++/* empty directory. This can also be achieved with a mount option. */
++#define CONFIG_YAFFS_EMPTY_LOST_AND_FOUND
+ 
+ /* Default: Selected */
+ /* Meaning: Cache short names, taking more RAM, but faster look-ups */
+ #define CONFIG_YAFFS_SHORT_NAMES_IN_RAM
+ 
+-/* Default: 10 */
+-/* Meaning: set the count of blocks to reserve for checkpointing */
+-#define CONFIG_YAFFS_CHECKPOINT_RESERVED_BLOCKS 10
++/* Default: Unselected */
++/* Meaning: Select to disable block refreshing. */
++/* Block Refreshing periodically rewrites the oldest block. */
++/* #define CONFIG_DISABLE_BLOCK_REFRESHING */
++
++/* Default: Unselected */
++/* Meaning: Select to disable background processing */
++/* #define CONFIG_DISABLE_BACKGROUND */
++
++
++/* Default: Selected */
++/* Meaning: Enable XATTR support */
++#define CONFIG_YAFFS_XATTR
+ 
+ /*
+-Older-style on-NAND data format has a "pageStatus" byte to record
++Older-style on-NAND data format has a "page_status" byte to record
+ chunk/page state.  This byte is zeroed when the page is discarded.
+ Choose this option if you have existing on-NAND data in this format
+ that you need to continue to support.  New data written also uses the
+@@ -57,7 +78,7 @@ adjusted to use the older-style format.
+ MTD versions in yaffs_mtdif1.c.
+ */
+ /* Default: Not selected */
+-/* Meaning: Use older-style on-NAND data format with pageStatus byte */
++/* Meaning: Use older-style on-NAND data format with page_status byte */
+ /* #define CONFIG_YAFFS_9BYTE_TAGS */
+ 
+ #endif /* YAFFS_OUT_OF_TREE */
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffs_allocator.c linux-2.6.36-rc8.new/fs/yaffs2/yaffs_allocator.c
+--- linux-2.6.36-rc8/fs/yaffs2/yaffs_allocator.c	1970-01-01 02:00:00.000000000 +0200
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffs_allocator.c	2010-10-20 13:28:15.998000294 +0300
+@@ -0,0 +1,409 @@
++/*
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2010 Aleph One Ltd.
++ *   for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ */
++
++
++#include "yaffs_allocator.h"
++#include "yaffs_guts.h"
++#include "yaffs_trace.h"
++#include "yportenv.h"
++
++#ifdef CONFIG_YAFFS_YMALLOC_ALLOCATOR
++
++void yaffs_deinit_raw_tnodes_and_objs(yaffs_dev_t *dev)
++{
++	dev = dev;
++}
++
++void yaffs_init_raw_tnodes_and_objs(yaffs_dev_t *dev)
++{
++	dev = dev;
++}
++
++yaffs_tnode_t *yaffs_alloc_raw_tnode(yaffs_dev_t *dev)
++{
++	return (yaffs_tnode_t *)YMALLOC(dev->tnode_size);
++}
++
++void yaffs_free_raw_tnode(yaffs_dev_t *dev, yaffs_tnode_t *tn)
++{
++	dev = dev;
++	YFREE(tn);
++}
++
++void yaffs_init_raw_objs(yaffs_dev_t *dev)
++{
++	dev = dev;
++}
++
++void yaffs_deinit_raw_objs(yaffs_dev_t *dev)
++{
++	dev = dev;
++}
++
++yaffs_obj_t *yaffs_alloc_raw_obj(yaffs_dev_t *dev)
++{
++	dev = dev;
++	return (yaffs_obj_t *) YMALLOC(sizeof(yaffs_obj_t));
++}
++
++
++void yaffs_free_raw_obj(yaffs_dev_t *dev, yaffs_obj_t *obj)
++{
++
++	dev = dev;
++	YFREE(obj);
++}
++
++#else
++
++struct yaffs_tnode_list {
++	struct yaffs_tnode_list *next;
++	yaffs_tnode_t *tnodes;
++};
++
++typedef struct yaffs_tnode_list yaffs_tnodelist_t;
++
++struct yaffs_obj_tList_struct {
++	yaffs_obj_t *objects;
++	struct yaffs_obj_tList_struct *next;
++};
++
++typedef struct yaffs_obj_tList_struct yaffs_obj_tList;
++
++
++struct yaffs_AllocatorStruct {
++	int n_tnodesCreated;
++	yaffs_tnode_t *freeTnodes;
++	int nFreeTnodes;
++	yaffs_tnodelist_t *allocatedTnodeList;
++
++	int n_objCreated;
++	yaffs_obj_t *freeObjects;
++	int nFreeObjects;
++
++	yaffs_obj_tList *allocatedObjectList;
++};
++
++typedef struct yaffs_AllocatorStruct yaffs_Allocator;
++
++
++static void yaffs_deinit_raw_tnodes(yaffs_dev_t *dev)
++{
++
++	yaffs_Allocator *allocator = (yaffs_Allocator *)dev->allocator;
++
++	yaffs_tnodelist_t *tmp;
++
++	if(!allocator){
++		YBUG();
++		return;
++	}
++
++	while (allocator->allocatedTnodeList) {
++		tmp = allocator->allocatedTnodeList->next;
++
++		YFREE(allocator->allocatedTnodeList->tnodes);
++		YFREE(allocator->allocatedTnodeList);
++		allocator->allocatedTnodeList = tmp;
++
++	}
++
++	allocator->freeTnodes = NULL;
++	allocator->nFreeTnodes = 0;
++	allocator->n_tnodesCreated = 0;
++}
++
++static void yaffs_init_raw_tnodes(yaffs_dev_t *dev)
++{
++	yaffs_Allocator *allocator = dev->allocator;
++
++	if(allocator){
++		allocator->allocatedTnodeList = NULL;
++		allocator->freeTnodes = NULL;
++		allocator->nFreeTnodes = 0;
++		allocator->n_tnodesCreated = 0;
++	} else
++		YBUG();
++}
++
++static int yaffs_create_tnodes(yaffs_dev_t *dev, int n_tnodes)
++{
++	yaffs_Allocator *allocator = (yaffs_Allocator *)dev->allocator;
++	int i;
++	yaffs_tnode_t *newTnodes;
++	__u8 *mem;
++	yaffs_tnode_t *curr;
++	yaffs_tnode_t *next;
++	yaffs_tnodelist_t *tnl;
++
++	if(!allocator){
++		YBUG();
++		return YAFFS_FAIL;
++	}
++
++	if (n_tnodes < 1)
++		return YAFFS_OK;
++
++
++	/* make these things */
++
++	newTnodes = YMALLOC(n_tnodes * dev->tnode_size);
++	mem = (__u8 *)newTnodes;
++
++	if (!newTnodes) {
++		T(YAFFS_TRACE_ERROR,
++			(TSTR("yaffs: Could not allocate Tnodes" TENDSTR)));
++		return YAFFS_FAIL;
++	}
++
++	/* New hookup for wide tnodes */
++	for (i = 0; i < n_tnodes - 1; i++) {
++		curr = (yaffs_tnode_t *) &mem[i * dev->tnode_size];
++		next = (yaffs_tnode_t *) &mem[(i+1) * dev->tnode_size];
++		curr->internal[0] = next;
++	}
++
++	curr = (yaffs_tnode_t *) &mem[(n_tnodes - 1) * dev->tnode_size];
++	curr->internal[0] = allocator->freeTnodes;
++	allocator->freeTnodes = (yaffs_tnode_t *)mem;
++
++	allocator->nFreeTnodes += n_tnodes;
++	allocator->n_tnodesCreated += n_tnodes;
++
++	/* Now add this bunch of tnodes to a list for freeing up.
++	 * NB If we can't add this to the management list it isn't fatal
++	 * but it just means we can't free this bunch of tnodes later.
++	 */
++
++	tnl = YMALLOC(sizeof(yaffs_tnodelist_t));
++	if (!tnl) {
++		T(YAFFS_TRACE_ERROR,
++		  (TSTR
++		   ("yaffs: Could not add tnodes to management list" TENDSTR)));
++		   return YAFFS_FAIL;
++	} else {
++		tnl->tnodes = newTnodes;
++		tnl->next = allocator->allocatedTnodeList;
++		allocator->allocatedTnodeList = tnl;
++	}
++
++	T(YAFFS_TRACE_ALLOCATE, (TSTR("yaffs: Tnodes added" TENDSTR)));
++
++	return YAFFS_OK;
++}
++
++
++yaffs_tnode_t *yaffs_alloc_raw_tnode(yaffs_dev_t *dev)
++{
++	yaffs_Allocator *allocator = (yaffs_Allocator *)dev->allocator;
++	yaffs_tnode_t *tn = NULL;
++
++	if(!allocator){
++		YBUG();
++		return NULL;
++	}
++
++	/* If there are none left make more */
++	if (!allocator->freeTnodes)
++		yaffs_create_tnodes(dev, YAFFS_ALLOCATION_NTNODES);
++
++	if (allocator->freeTnodes) {
++		tn = allocator->freeTnodes;
++		allocator->freeTnodes = allocator->freeTnodes->internal[0];
++		allocator->nFreeTnodes--;
++	}
++
++	return tn;
++}
++
++/* FreeTnode frees up a tnode and puts it back on the free list */
++void yaffs_free_raw_tnode(yaffs_dev_t *dev, yaffs_tnode_t *tn)
++{
++	yaffs_Allocator *allocator = dev->allocator;
++
++	if(!allocator){
++		YBUG();
++		return;
++	}
++
++	if (tn) {
++		tn->internal[0] = allocator->freeTnodes;
++		allocator->freeTnodes = tn;
++		allocator->nFreeTnodes++;
++	}
++	dev->checkpoint_blocks_required = 0; /* force recalculation*/
++}
++
++
++
++static void yaffs_init_raw_objs(yaffs_dev_t *dev)
++{
++	yaffs_Allocator *allocator = dev->allocator;
++
++	if(allocator) {
++		allocator->allocatedObjectList = NULL;
++		allocator->freeObjects = NULL;
++		allocator->nFreeObjects = 0;
++	} else
++		YBUG();
++}
++
++static void yaffs_deinit_raw_objs(yaffs_dev_t *dev)
++{
++	yaffs_Allocator *allocator = dev->allocator;
++	yaffs_obj_tList *tmp;
++
++	if(!allocator){
++		YBUG();
++		return;
++	}
++
++	while (allocator->allocatedObjectList) {
++		tmp = allocator->allocatedObjectList->next;
++		YFREE(allocator->allocatedObjectList->objects);
++		YFREE(allocator->allocatedObjectList);
++
++		allocator->allocatedObjectList = tmp;
++	}
++
++	allocator->freeObjects = NULL;
++	allocator->nFreeObjects = 0;
++	allocator->n_objCreated = 0;
++}
++
++
++static int yaffs_create_free_objs(yaffs_dev_t *dev, int n_obj)
++{
++	yaffs_Allocator *allocator = dev->allocator;
++
++	int i;
++	yaffs_obj_t *newObjects;
++	yaffs_obj_tList *list;
++
++	if(!allocator){
++		YBUG();
++		return YAFFS_FAIL;
++	}
++
++	if (n_obj < 1)
++		return YAFFS_OK;
++
++	/* make these things */
++	newObjects = YMALLOC(n_obj * sizeof(yaffs_obj_t));
++	list = YMALLOC(sizeof(yaffs_obj_tList));
++
++	if (!newObjects || !list) {
++		if (newObjects){
++			YFREE(newObjects);
++			newObjects = NULL;
++		}
++		if (list){
++			YFREE(list);
++			list = NULL;
++		}
++		T(YAFFS_TRACE_ALLOCATE,
++		  (TSTR("yaffs: Could not allocate more objects" TENDSTR)));
++		return YAFFS_FAIL;
++	}
++
++	/* Hook them into the free list */
++	for (i = 0; i < n_obj - 1; i++) {
++		newObjects[i].siblings.next =
++				(struct ylist_head *)(&newObjects[i + 1]);
++	}
++
++	newObjects[n_obj - 1].siblings.next = (void *)allocator->freeObjects;
++	allocator->freeObjects = newObjects;
++	allocator->nFreeObjects += n_obj;
++	allocator->n_objCreated += n_obj;
++
++	/* Now add this bunch of Objects to a list for freeing up. */
++
++	list->objects = newObjects;
++	list->next = allocator->allocatedObjectList;
++	allocator->allocatedObjectList = list;
++
++	return YAFFS_OK;
++}
++
++yaffs_obj_t *yaffs_alloc_raw_obj(yaffs_dev_t *dev)
++{
++	yaffs_obj_t *obj = NULL;
++	yaffs_Allocator *allocator = dev->allocator;
++
++	if(!allocator) {
++		YBUG();
++		return obj;
++	}
++
++	/* If there are none left make more */
++	if (!allocator->freeObjects)
++		yaffs_create_free_objs(dev, YAFFS_ALLOCATION_NOBJECTS);
++
++	if (allocator->freeObjects) {
++		obj = allocator->freeObjects;
++		allocator->freeObjects =
++			(yaffs_obj_t *) (allocator->freeObjects->siblings.next);
++		allocator->nFreeObjects--;
++	}
++
++	return obj;
++}
++
++
++void yaffs_free_raw_obj(yaffs_dev_t *dev, yaffs_obj_t *obj)
++{
++
++	yaffs_Allocator *allocator = dev->allocator;
++
++	if(!allocator)
++		YBUG();
++	else {
++		/* Link into the free list. */
++		obj->siblings.next = (struct ylist_head *)(allocator->freeObjects);
++		allocator->freeObjects = obj;
++		allocator->nFreeObjects++;
++	}
++}
++
++void yaffs_deinit_raw_tnodes_and_objs(yaffs_dev_t *dev)
++{
++	if(dev->allocator){
++		yaffs_deinit_raw_tnodes(dev);
++		yaffs_deinit_raw_objs(dev);
++
++		YFREE(dev->allocator);
++		dev->allocator=NULL;
++	} else
++		YBUG();
++}
++
++void yaffs_init_raw_tnodes_and_objs(yaffs_dev_t *dev)
++{
++	yaffs_Allocator *allocator;
++
++	if(!dev->allocator){
++		allocator = YMALLOC(sizeof(yaffs_Allocator));
++		if(allocator){
++			dev->allocator = allocator;
++			yaffs_init_raw_tnodes(dev);
++			yaffs_init_raw_objs(dev);
++		}
++	} else
++		YBUG();
++}
++
++
++#endif
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffs_allocator.h linux-2.6.36-rc8.new/fs/yaffs2/yaffs_allocator.h
+--- linux-2.6.36-rc8/fs/yaffs2/yaffs_allocator.h	1970-01-01 02:00:00.000000000 +0200
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffs_allocator.h	2010-10-20 13:28:16.058000294 +0300
+@@ -0,0 +1,30 @@
++/*
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2010 Aleph One Ltd.
++ *   for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ */
++
++#ifndef __YAFFS_ALLOCATOR_H__
++#define __YAFFS_ALLOCATOR_H__
++
++#include "yaffs_guts.h"
++
++void yaffs_init_raw_tnodes_and_objs(yaffs_dev_t *dev);
++void yaffs_deinit_raw_tnodes_and_objs(yaffs_dev_t *dev);
++
++yaffs_tnode_t *yaffs_alloc_raw_tnode(yaffs_dev_t *dev);
++void yaffs_free_raw_tnode(yaffs_dev_t *dev, yaffs_tnode_t *tn);
++
++yaffs_obj_t *yaffs_alloc_raw_obj(yaffs_dev_t *dev);
++void yaffs_free_raw_obj(yaffs_dev_t *dev, yaffs_obj_t *obj);
++
++#endif
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffs_bitmap.c linux-2.6.36-rc8.new/fs/yaffs2/yaffs_bitmap.c
+--- linux-2.6.36-rc8/fs/yaffs2/yaffs_bitmap.c	1970-01-01 02:00:00.000000000 +0200
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffs_bitmap.c	2010-10-20 13:28:15.998000294 +0300
+@@ -0,0 +1,105 @@
++/*
++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2010 Aleph One Ltd.
++ *   for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ */
++
++#include "yaffs_bitmap.h"
++#include "yaffs_trace.h"
++/*
++ * Chunk bitmap manipulations
++ */
++
++static Y_INLINE __u8 *yaffs_BlockBits(yaffs_dev_t *dev, int blk)
++{
++	if (blk < dev->internal_start_block || blk > dev->internal_end_block) {
++		T(YAFFS_TRACE_ERROR,
++			(TSTR("**>> yaffs: BlockBits block %d is not valid" TENDSTR),
++			blk));
++		YBUG();
++	}
++	return dev->chunk_bits +
++		(dev->chunk_bit_stride * (blk - dev->internal_start_block));
++}
++
++void yaffs_verify_chunk_bit_id(yaffs_dev_t *dev, int blk, int chunk)
++{
++	if (blk < dev->internal_start_block || blk > dev->internal_end_block ||
++			chunk < 0 || chunk >= dev->param.chunks_per_block) {
++		T(YAFFS_TRACE_ERROR,
++		(TSTR("**>> yaffs: Chunk Id (%d:%d) invalid"TENDSTR),
++			blk, chunk));
++		YBUG();
++	}
++}
++
++void yaffs_clear_chunk_bits(yaffs_dev_t *dev, int blk)
++{
++	__u8 *blkBits = yaffs_BlockBits(dev, blk);
++
++	memset(blkBits, 0, dev->chunk_bit_stride);
++}
++
++void yaffs_clear_chunk_bit(yaffs_dev_t *dev, int blk, int chunk)
++{
++	__u8 *blkBits = yaffs_BlockBits(dev, blk);
++
++	yaffs_verify_chunk_bit_id(dev, blk, chunk);
++
++	blkBits[chunk / 8] &= ~(1 << (chunk & 7));
++}
++
++void yaffs_set_chunk_bit(yaffs_dev_t *dev, int blk, int chunk)
++{
++	__u8 *blkBits = yaffs_BlockBits(dev, blk);
++
++	yaffs_verify_chunk_bit_id(dev, blk, chunk);
++
++	blkBits[chunk / 8] |= (1 << (chunk & 7));
++}
++
++int yaffs_check_chunk_bit(yaffs_dev_t *dev, int blk, int chunk)
++{
++	__u8 *blkBits = yaffs_BlockBits(dev, blk);
++	yaffs_verify_chunk_bit_id(dev, blk, chunk);
++
++	return (blkBits[chunk / 8] & (1 << (chunk & 7))) ? 1 : 0;
++}
++
++int yaffs_still_some_chunks(yaffs_dev_t *dev, int blk)
++{
++	__u8 *blkBits = yaffs_BlockBits(dev, blk);
++	int i;
++	for (i = 0; i < dev->chunk_bit_stride; i++) {
++		if (*blkBits)
++			return 1;
++		blkBits++;
++	}
++	return 0;
++}
++
++int yaffs_count_chunk_bits(yaffs_dev_t *dev, int blk)
++{
++	__u8 *blkBits = yaffs_BlockBits(dev, blk);
++	int i;
++	int n = 0;
++	for (i = 0; i < dev->chunk_bit_stride; i++) {
++		__u8 x = *blkBits;
++		while (x) {
++			if (x & 1)
++				n++;
++			x >>= 1;
++		}
++
++		blkBits++;
++	}
++	return n;
++}
++
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffs_bitmap.h linux-2.6.36-rc8.new/fs/yaffs2/yaffs_bitmap.h
+--- linux-2.6.36-rc8/fs/yaffs2/yaffs_bitmap.h	1970-01-01 02:00:00.000000000 +0200
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffs_bitmap.h	2010-10-20 13:28:16.058000294 +0300
+@@ -0,0 +1,31 @@
++/*
++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2010 Aleph One Ltd.
++ *   for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ */
++
++/*
++ * Chunk bitmap manipulations
++ */
++
++#ifndef __YAFFS_BITMAP_H__
++#define __YAFFS_BITMAP_H__
++
++#include "yaffs_guts.h"
++
++void yaffs_verify_chunk_bit_id(yaffs_dev_t *dev, int blk, int chunk);
++void yaffs_clear_chunk_bits(yaffs_dev_t *dev, int blk);
++void yaffs_clear_chunk_bit(yaffs_dev_t *dev, int blk, int chunk);
++void yaffs_set_chunk_bit(yaffs_dev_t *dev, int blk, int chunk);
++int yaffs_check_chunk_bit(yaffs_dev_t *dev, int blk, int chunk);
++int yaffs_still_some_chunks(yaffs_dev_t *dev, int blk);
++int yaffs_count_chunk_bits(yaffs_dev_t *dev, int blk);
++
++#endif
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffs_checkptrw.c linux-2.6.36-rc8.new/fs/yaffs2/yaffs_checkptrw.c
+--- linux-2.6.36-rc8/fs/yaffs2/yaffs_checkptrw.c	2010-10-20 13:17:58.941000294 +0300
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffs_checkptrw.c	2010-10-20 13:28:15.999000294 +0300
+@@ -1,7 +1,7 @@
+ /*
+  * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+  *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+  *   for Toby Churchill Ltd and Brightstar Engineering
+  *
+  * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -11,16 +11,12 @@
+  * published by the Free Software Foundation.
+  */
+ 
+-const char *yaffs_checkptrw_c_version =
+-	"$Id: yaffs_checkptrw.c,v 1.18 2009-03-06 17:20:49 wookey Exp $";
+-
+-
+ #include "yaffs_checkptrw.h"
+ #include "yaffs_getblockinfo.h"
+ 
+-static int yaffs_CheckpointSpaceOk(yaffs_Device *dev)
++static int yaffs2_checkpt_space_ok(yaffs_dev_t *dev)
+ {
+-	int blocksAvailable = dev->nErasedBlocks - dev->nReservedBlocks;
++	int blocksAvailable = dev->n_erased_blocks - dev->param.n_reserved_blocks;
+ 
+ 	T(YAFFS_TRACE_CHECKPOINT,
+ 		(TSTR("checkpt blocks available = %d" TENDSTR),
+@@ -30,53 +26,56 @@ static int yaffs_CheckpointSpaceOk(yaffs
+ }
+ 
+ 
+-static int yaffs_CheckpointErase(yaffs_Device *dev)
++static int yaffs_checkpt_erase(yaffs_dev_t *dev)
+ {
+ 	int i;
+ 
+-	if (!dev->eraseBlockInNAND)
++	if (!dev->param.erase_fn)
+ 		return 0;
+ 	T(YAFFS_TRACE_CHECKPOINT, (TSTR("checking blocks %d to %d"TENDSTR),
+-		dev->internalStartBlock, dev->internalEndBlock));
++		dev->internal_start_block, dev->internal_end_block));
+ 
+-	for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
+-		yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, i);
+-		if (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT) {
++	for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) {
++		yaffs_block_info_t *bi = yaffs_get_block_info(dev, i);
++		if (bi->block_state == YAFFS_BLOCK_STATE_CHECKPOINT) {
+ 			T(YAFFS_TRACE_CHECKPOINT, (TSTR("erasing checkpt block %d"TENDSTR), i));
+-			if (dev->eraseBlockInNAND(dev, i - dev->blockOffset /* realign */)) {
+-				bi->blockState = YAFFS_BLOCK_STATE_EMPTY;
+-				dev->nErasedBlocks++;
+-				dev->nFreeChunks += dev->nChunksPerBlock;
++
++			dev->n_erasures++;
++
++			if (dev->param.erase_fn(dev, i - dev->block_offset /* realign */)) {
++				bi->block_state = YAFFS_BLOCK_STATE_EMPTY;
++				dev->n_erased_blocks++;
++				dev->n_free_chunks += dev->param.chunks_per_block;
+ 			} else {
+-				dev->markNANDBlockBad(dev, i);
+-				bi->blockState = YAFFS_BLOCK_STATE_DEAD;
++				dev->param.bad_block_fn(dev, i);
++				bi->block_state = YAFFS_BLOCK_STATE_DEAD;
+ 			}
+ 		}
+ 	}
+ 
+-	dev->blocksInCheckpoint = 0;
++	dev->blocks_in_checkpt = 0;
+ 
+ 	return 1;
+ }
+ 
+ 
+-static void yaffs_CheckpointFindNextErasedBlock(yaffs_Device *dev)
++static void yaffs2_checkpt_find_erased_block(yaffs_dev_t *dev)
+ {
+ 	int  i;
+-	int blocksAvailable = dev->nErasedBlocks - dev->nReservedBlocks;
++	int blocksAvailable = dev->n_erased_blocks - dev->param.n_reserved_blocks;
+ 	T(YAFFS_TRACE_CHECKPOINT,
+ 		(TSTR("allocating checkpt block: erased %d reserved %d avail %d next %d "TENDSTR),
+-		dev->nErasedBlocks, dev->nReservedBlocks, blocksAvailable, dev->checkpointNextBlock));
++		dev->n_erased_blocks, dev->param.n_reserved_blocks, blocksAvailable, dev->checkpt_next_block));
+ 
+-	if (dev->checkpointNextBlock >= 0 &&
+-			dev->checkpointNextBlock <= dev->internalEndBlock &&
++	if (dev->checkpt_next_block >= 0 &&
++			dev->checkpt_next_block <= dev->internal_end_block &&
+ 			blocksAvailable > 0) {
+ 
+-		for (i = dev->checkpointNextBlock; i <= dev->internalEndBlock; i++) {
+-			yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, i);
+-			if (bi->blockState == YAFFS_BLOCK_STATE_EMPTY) {
+-				dev->checkpointNextBlock = i + 1;
+-				dev->checkpointCurrentBlock = i;
++		for (i = dev->checkpt_next_block; i <= dev->internal_end_block; i++) {
++			yaffs_block_info_t *bi = yaffs_get_block_info(dev, i);
++			if (bi->block_state == YAFFS_BLOCK_STATE_EMPTY) {
++				dev->checkpt_next_block = i + 1;
++				dev->checkpt_cur_block = i;
+ 				T(YAFFS_TRACE_CHECKPOINT, (TSTR("allocating checkpt block %d"TENDSTR), i));
+ 				return;
+ 			}
+@@ -84,34 +83,34 @@ static void yaffs_CheckpointFindNextEras
+ 	}
+ 	T(YAFFS_TRACE_CHECKPOINT, (TSTR("out of checkpt blocks"TENDSTR)));
+ 
+-	dev->checkpointNextBlock = -1;
+-	dev->checkpointCurrentBlock = -1;
++	dev->checkpt_next_block = -1;
++	dev->checkpt_cur_block = -1;
+ }
+ 
+-static void yaffs_CheckpointFindNextCheckpointBlock(yaffs_Device *dev)
++static void yaffs2_checkpt_find_block(yaffs_dev_t *dev)
+ {
+ 	int  i;
+-	yaffs_ExtendedTags tags;
++	yaffs_ext_tags tags;
+ 
+ 	T(YAFFS_TRACE_CHECKPOINT, (TSTR("find next checkpt block: start:  blocks %d next %d" TENDSTR),
+-		dev->blocksInCheckpoint, dev->checkpointNextBlock));
++		dev->blocks_in_checkpt, dev->checkpt_next_block));
+ 
+-	if (dev->blocksInCheckpoint < dev->checkpointMaxBlocks)
+-		for (i = dev->checkpointNextBlock; i <= dev->internalEndBlock; i++) {
+-			int chunk = i * dev->nChunksPerBlock;
+-			int realignedChunk = chunk - dev->chunkOffset;
++	if (dev->blocks_in_checkpt < dev->checkpt_max_blocks)
++		for (i = dev->checkpt_next_block; i <= dev->internal_end_block; i++) {
++			int chunk = i * dev->param.chunks_per_block;
++			int realignedChunk = chunk - dev->chunk_offset;
+ 
+-			dev->readChunkWithTagsFromNAND(dev, realignedChunk,
++			dev->param.read_chunk_tags_fn(dev, realignedChunk,
+ 					NULL, &tags);
+ 			T(YAFFS_TRACE_CHECKPOINT, (TSTR("find next checkpt block: search: block %d oid %d seq %d eccr %d" TENDSTR),
+-				i, tags.objectId, tags.sequenceNumber, tags.eccResult));
++				i, tags.obj_id, tags.seq_number, tags.ecc_result));
+ 
+-			if (tags.sequenceNumber == YAFFS_SEQUENCE_CHECKPOINT_DATA) {
++			if (tags.seq_number == YAFFS_SEQUENCE_CHECKPOINT_DATA) {
+ 				/* Right kind of block */
+-				dev->checkpointNextBlock = tags.objectId;
+-				dev->checkpointCurrentBlock = i;
+-				dev->checkpointBlockList[dev->blocksInCheckpoint] = i;
+-				dev->blocksInCheckpoint++;
++				dev->checkpt_next_block = tags.obj_id;
++				dev->checkpt_cur_block = i;
++				dev->checkpt_block_list[dev->blocks_in_checkpt] = i;
++				dev->blocks_in_checkpt++;
+ 				T(YAFFS_TRACE_CHECKPOINT, (TSTR("found checkpt block %d"TENDSTR), i));
+ 				return;
+ 			}
+@@ -119,122 +118,127 @@ static void yaffs_CheckpointFindNextChec
+ 
+ 	T(YAFFS_TRACE_CHECKPOINT, (TSTR("found no more checkpt blocks"TENDSTR)));
+ 
+-	dev->checkpointNextBlock = -1;
+-	dev->checkpointCurrentBlock = -1;
++	dev->checkpt_next_block = -1;
++	dev->checkpt_cur_block = -1;
+ }
+ 
+ 
+-int yaffs_CheckpointOpen(yaffs_Device *dev, int forWriting)
++int yaffs2_checkpt_open(yaffs_dev_t *dev, int forWriting)
+ {
+ 
++
++	dev->checkpt_open_write = forWriting;
++
+ 	/* Got the functions we need? */
+-	if (!dev->writeChunkWithTagsToNAND ||
+-			!dev->readChunkWithTagsFromNAND ||
+-			!dev->eraseBlockInNAND ||
+-			!dev->markNANDBlockBad)
++	if (!dev->param.write_chunk_tags_fn ||
++		!dev->param.read_chunk_tags_fn ||
++		!dev->param.erase_fn ||
++		!dev->param.bad_block_fn)
+ 		return 0;
+ 
+-	if (forWriting && !yaffs_CheckpointSpaceOk(dev))
++	if (forWriting && !yaffs2_checkpt_space_ok(dev))
+ 		return 0;
+ 
+-	if (!dev->checkpointBuffer)
+-		dev->checkpointBuffer = YMALLOC_DMA(dev->totalBytesPerChunk);
+-	if (!dev->checkpointBuffer)
++	if (!dev->checkpt_buffer)
++		dev->checkpt_buffer = YMALLOC_DMA(dev->param.total_bytes_per_chunk);
++	if (!dev->checkpt_buffer)
+ 		return 0;
+ 
+ 
+-	dev->checkpointPageSequence = 0;
+-
+-	dev->checkpointOpenForWrite = forWriting;
+-
+-	dev->checkpointByteCount = 0;
+-	dev->checkpointSum = 0;
+-	dev->checkpointXor = 0;
+-	dev->checkpointCurrentBlock = -1;
+-	dev->checkpointCurrentChunk = -1;
+-	dev->checkpointNextBlock = dev->internalStartBlock;
++	dev->checkpt_page_seq = 0;
++	dev->checkpt_byte_count = 0;
++	dev->checkpt_sum = 0;
++	dev->checkpt_xor = 0;
++	dev->checkpt_cur_block = -1;
++	dev->checkpt_cur_chunk = -1;
++	dev->checkpt_next_block = dev->internal_start_block;
+ 
+ 	/* Erase all the blocks in the checkpoint area */
+ 	if (forWriting) {
+-		memset(dev->checkpointBuffer, 0, dev->nDataBytesPerChunk);
+-		dev->checkpointByteOffset = 0;
+-		return yaffs_CheckpointErase(dev);
++		memset(dev->checkpt_buffer, 0, dev->data_bytes_per_chunk);
++		dev->checkpt_byte_offs = 0;
++		return yaffs_checkpt_erase(dev);
+ 	} else {
+ 		int i;
+ 		/* Set to a value that will kick off a read */
+-		dev->checkpointByteOffset = dev->nDataBytesPerChunk;
++		dev->checkpt_byte_offs = dev->data_bytes_per_chunk;
+ 		/* A checkpoint block list of 1 checkpoint block per 16 block is (hopefully)
+ 		 * going to be way more than we need */
+-		dev->blocksInCheckpoint = 0;
+-		dev->checkpointMaxBlocks = (dev->internalEndBlock - dev->internalStartBlock)/16 + 2;
+-		dev->checkpointBlockList = YMALLOC(sizeof(int) * dev->checkpointMaxBlocks);
+-		for (i = 0; i < dev->checkpointMaxBlocks; i++)
+-			dev->checkpointBlockList[i] = -1;
++		dev->blocks_in_checkpt = 0;
++		dev->checkpt_max_blocks = (dev->internal_end_block - dev->internal_start_block)/16 + 2;
++		dev->checkpt_block_list = YMALLOC(sizeof(int) * dev->checkpt_max_blocks);
++		if(!dev->checkpt_block_list)
++			return 0;
++
++		for (i = 0; i < dev->checkpt_max_blocks; i++)
++			dev->checkpt_block_list[i] = -1;
+ 	}
+ 
+ 	return 1;
+ }
+ 
+-int yaffs_GetCheckpointSum(yaffs_Device *dev, __u32 *sum)
++int yaffs2_get_checkpt_sum(yaffs_dev_t *dev, __u32 *sum)
+ {
+ 	__u32 compositeSum;
+-	compositeSum =  (dev->checkpointSum << 8) | (dev->checkpointXor & 0xFF);
++	compositeSum =  (dev->checkpt_sum << 8) | (dev->checkpt_xor & 0xFF);
+ 	*sum = compositeSum;
+ 	return 1;
+ }
+ 
+-static int yaffs_CheckpointFlushBuffer(yaffs_Device *dev)
++static int yaffs2_checkpt_flush_buffer(yaffs_dev_t *dev)
+ {
+ 	int chunk;
+ 	int realignedChunk;
+ 
+-	yaffs_ExtendedTags tags;
++	yaffs_ext_tags tags;
+ 
+-	if (dev->checkpointCurrentBlock < 0) {
+-		yaffs_CheckpointFindNextErasedBlock(dev);
+-		dev->checkpointCurrentChunk = 0;
++	if (dev->checkpt_cur_block < 0) {
++		yaffs2_checkpt_find_erased_block(dev);
++		dev->checkpt_cur_chunk = 0;
+ 	}
+ 
+-	if (dev->checkpointCurrentBlock < 0)
++	if (dev->checkpt_cur_block < 0)
+ 		return 0;
+ 
+-	tags.chunkDeleted = 0;
+-	tags.objectId = dev->checkpointNextBlock; /* Hint to next place to look */
+-	tags.chunkId = dev->checkpointPageSequence + 1;
+-	tags.sequenceNumber =  YAFFS_SEQUENCE_CHECKPOINT_DATA;
+-	tags.byteCount = dev->nDataBytesPerChunk;
+-	if (dev->checkpointCurrentChunk == 0) {
++	tags.is_deleted = 0;
++	tags.obj_id = dev->checkpt_next_block; /* Hint to next place to look */
++	tags.chunk_id = dev->checkpt_page_seq + 1;
++	tags.seq_number =  YAFFS_SEQUENCE_CHECKPOINT_DATA;
++	tags.n_bytes = dev->data_bytes_per_chunk;
++	if (dev->checkpt_cur_chunk == 0) {
+ 		/* First chunk we write for the block? Set block state to
+ 		   checkpoint */
+-		yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, dev->checkpointCurrentBlock);
+-		bi->blockState = YAFFS_BLOCK_STATE_CHECKPOINT;
+-		dev->blocksInCheckpoint++;
++		yaffs_block_info_t *bi = yaffs_get_block_info(dev, dev->checkpt_cur_block);
++		bi->block_state = YAFFS_BLOCK_STATE_CHECKPOINT;
++		dev->blocks_in_checkpt++;
+ 	}
+ 
+-	chunk = dev->checkpointCurrentBlock * dev->nChunksPerBlock + dev->checkpointCurrentChunk;
++	chunk = dev->checkpt_cur_block * dev->param.chunks_per_block + dev->checkpt_cur_chunk;
+ 
+ 
+ 	T(YAFFS_TRACE_CHECKPOINT, (TSTR("checkpoint wite buffer nand %d(%d:%d) objid %d chId %d" TENDSTR),
+-		chunk, dev->checkpointCurrentBlock, dev->checkpointCurrentChunk, tags.objectId, tags.chunkId));
++		chunk, dev->checkpt_cur_block, dev->checkpt_cur_chunk, tags.obj_id, tags.chunk_id));
+ 
+-	realignedChunk = chunk - dev->chunkOffset;
++	realignedChunk = chunk - dev->chunk_offset;
+ 
+-	dev->writeChunkWithTagsToNAND(dev, realignedChunk,
+-			dev->checkpointBuffer, &tags);
+-	dev->checkpointByteOffset = 0;
+-	dev->checkpointPageSequence++;
+-	dev->checkpointCurrentChunk++;
+-	if (dev->checkpointCurrentChunk >= dev->nChunksPerBlock) {
+-		dev->checkpointCurrentChunk = 0;
+-		dev->checkpointCurrentBlock = -1;
++	dev->n_page_writes++;
++
++	dev->param.write_chunk_tags_fn(dev, realignedChunk,
++			dev->checkpt_buffer, &tags);
++	dev->checkpt_byte_offs = 0;
++	dev->checkpt_page_seq++;
++	dev->checkpt_cur_chunk++;
++	if (dev->checkpt_cur_chunk >= dev->param.chunks_per_block) {
++		dev->checkpt_cur_chunk = 0;
++		dev->checkpt_cur_block = -1;
+ 	}
+-	memset(dev->checkpointBuffer, 0, dev->nDataBytesPerChunk);
++	memset(dev->checkpt_buffer, 0, dev->data_bytes_per_chunk);
+ 
+ 	return 1;
+ }
+ 
+ 
+-int yaffs_CheckpointWrite(yaffs_Device *dev, const void *data, int nBytes)
++int yaffs2_checkpt_wr(yaffs_dev_t *dev, const void *data, int n_bytes)
+ {
+ 	int i = 0;
+ 	int ok = 1;
+@@ -244,36 +248,36 @@ int yaffs_CheckpointWrite(yaffs_Device *
+ 
+ 
+ 
+-	if (!dev->checkpointBuffer)
++	if (!dev->checkpt_buffer)
+ 		return 0;
+ 
+-	if (!dev->checkpointOpenForWrite)
++	if (!dev->checkpt_open_write)
+ 		return -1;
+ 
+-	while (i < nBytes && ok) {
+-		dev->checkpointBuffer[dev->checkpointByteOffset] = *dataBytes;
+-		dev->checkpointSum += *dataBytes;
+-		dev->checkpointXor ^= *dataBytes;
++	while (i < n_bytes && ok) {
++		dev->checkpt_buffer[dev->checkpt_byte_offs] = *dataBytes;
++		dev->checkpt_sum += *dataBytes;
++		dev->checkpt_xor ^= *dataBytes;
+ 
+-		dev->checkpointByteOffset++;
++		dev->checkpt_byte_offs++;
+ 		i++;
+ 		dataBytes++;
+-		dev->checkpointByteCount++;
++		dev->checkpt_byte_count++;
+ 
+ 
+-		if (dev->checkpointByteOffset < 0 ||
+-		   dev->checkpointByteOffset >= dev->nDataBytesPerChunk)
+-			ok = yaffs_CheckpointFlushBuffer(dev);
++		if (dev->checkpt_byte_offs < 0 ||
++		   dev->checkpt_byte_offs >= dev->data_bytes_per_chunk)
++			ok = yaffs2_checkpt_flush_buffer(dev);
+ 	}
+ 
+ 	return i;
+ }
+ 
+-int yaffs_CheckpointRead(yaffs_Device *dev, void *data, int nBytes)
++int yaffs2_checkpt_rd(yaffs_dev_t *dev, void *data, int n_bytes)
+ {
+ 	int i = 0;
+ 	int ok = 1;
+-	yaffs_ExtendedTags tags;
++	yaffs_ext_tags tags;
+ 
+ 
+ 	int chunk;
+@@ -281,113 +285,116 @@ int yaffs_CheckpointRead(yaffs_Device *d
+ 
+ 	__u8 *dataBytes = (__u8 *)data;
+ 
+-	if (!dev->checkpointBuffer)
++	if (!dev->checkpt_buffer)
+ 		return 0;
+ 
+-	if (dev->checkpointOpenForWrite)
++	if (dev->checkpt_open_write)
+ 		return -1;
+ 
+-	while (i < nBytes && ok) {
++	while (i < n_bytes && ok) {
+ 
+ 
+-		if (dev->checkpointByteOffset < 0 ||
+-			dev->checkpointByteOffset >= dev->nDataBytesPerChunk) {
++		if (dev->checkpt_byte_offs < 0 ||
++			dev->checkpt_byte_offs >= dev->data_bytes_per_chunk) {
+ 
+-			if (dev->checkpointCurrentBlock < 0) {
+-				yaffs_CheckpointFindNextCheckpointBlock(dev);
+-				dev->checkpointCurrentChunk = 0;
++			if (dev->checkpt_cur_block < 0) {
++				yaffs2_checkpt_find_block(dev);
++				dev->checkpt_cur_chunk = 0;
+ 			}
+ 
+-			if (dev->checkpointCurrentBlock < 0)
++			if (dev->checkpt_cur_block < 0)
+ 				ok = 0;
+ 			else {
+-				chunk = dev->checkpointCurrentBlock *
+-					dev->nChunksPerBlock +
+-					dev->checkpointCurrentChunk;
+-
+-				realignedChunk = chunk - dev->chunkOffset;
++				chunk = dev->checkpt_cur_block *
++					dev->param.chunks_per_block +
++					dev->checkpt_cur_chunk;
++
++				realignedChunk = chunk - dev->chunk_offset;
++				
++				dev->n_page_reads++;
+ 
+ 				/* read in the next chunk */
+ 				/* printf("read checkpoint page %d\n",dev->checkpointPage); */
+-				dev->readChunkWithTagsFromNAND(dev,
++				dev->param.read_chunk_tags_fn(dev,
+ 						realignedChunk,
+-						dev->checkpointBuffer,
++						dev->checkpt_buffer,
+ 						&tags);
+ 
+-				if (tags.chunkId != (dev->checkpointPageSequence + 1) ||
+-					tags.eccResult > YAFFS_ECC_RESULT_FIXED ||
+-					tags.sequenceNumber != YAFFS_SEQUENCE_CHECKPOINT_DATA)
++				if (tags.chunk_id != (dev->checkpt_page_seq + 1) ||
++					tags.ecc_result > YAFFS_ECC_RESULT_FIXED ||
++					tags.seq_number != YAFFS_SEQUENCE_CHECKPOINT_DATA)
+ 					ok = 0;
+ 
+-				dev->checkpointByteOffset = 0;
+-				dev->checkpointPageSequence++;
+-				dev->checkpointCurrentChunk++;
++				dev->checkpt_byte_offs = 0;
++				dev->checkpt_page_seq++;
++				dev->checkpt_cur_chunk++;
+ 
+-				if (dev->checkpointCurrentChunk >= dev->nChunksPerBlock)
+-					dev->checkpointCurrentBlock = -1;
++				if (dev->checkpt_cur_chunk >= dev->param.chunks_per_block)
++					dev->checkpt_cur_block = -1;
+ 			}
+ 		}
+ 
+ 		if (ok) {
+-			*dataBytes = dev->checkpointBuffer[dev->checkpointByteOffset];
+-			dev->checkpointSum += *dataBytes;
+-			dev->checkpointXor ^= *dataBytes;
+-			dev->checkpointByteOffset++;
++			*dataBytes = dev->checkpt_buffer[dev->checkpt_byte_offs];
++			dev->checkpt_sum += *dataBytes;
++			dev->checkpt_xor ^= *dataBytes;
++			dev->checkpt_byte_offs++;
+ 			i++;
+ 			dataBytes++;
+-			dev->checkpointByteCount++;
++			dev->checkpt_byte_count++;
+ 		}
+ 	}
+ 
+ 	return 	i;
+ }
+ 
+-int yaffs_CheckpointClose(yaffs_Device *dev)
++int yaffs_checkpt_close(yaffs_dev_t *dev)
+ {
+ 
+-	if (dev->checkpointOpenForWrite) {
+-		if (dev->checkpointByteOffset != 0)
+-			yaffs_CheckpointFlushBuffer(dev);
+-	} else {
++	if (dev->checkpt_open_write) {
++		if (dev->checkpt_byte_offs != 0)
++			yaffs2_checkpt_flush_buffer(dev);
++	} else if(dev->checkpt_block_list){
+ 		int i;
+-		for (i = 0; i < dev->blocksInCheckpoint && dev->checkpointBlockList[i] >= 0; i++) {
+-			yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, dev->checkpointBlockList[i]);
+-			if (bi->blockState == YAFFS_BLOCK_STATE_EMPTY)
+-				bi->blockState = YAFFS_BLOCK_STATE_CHECKPOINT;
++		for (i = 0; i < dev->blocks_in_checkpt && dev->checkpt_block_list[i] >= 0; i++) {
++			int blk = dev->checkpt_block_list[i];
++			yaffs_block_info_t *bi = NULL;
++			if( dev->internal_start_block <= blk && blk <= dev->internal_end_block)
++				bi = yaffs_get_block_info(dev, blk);
++			if (bi && bi->block_state == YAFFS_BLOCK_STATE_EMPTY)
++				bi->block_state = YAFFS_BLOCK_STATE_CHECKPOINT;
+ 			else {
+ 				/* Todo this looks odd... */
+ 			}
+ 		}
+-		YFREE(dev->checkpointBlockList);
+-		dev->checkpointBlockList = NULL;
++		YFREE(dev->checkpt_block_list);
++		dev->checkpt_block_list = NULL;
+ 	}
+ 
+-	dev->nFreeChunks -= dev->blocksInCheckpoint * dev->nChunksPerBlock;
+-	dev->nErasedBlocks -= dev->blocksInCheckpoint;
++	dev->n_free_chunks -= dev->blocks_in_checkpt * dev->param.chunks_per_block;
++	dev->n_erased_blocks -= dev->blocks_in_checkpt;
+ 
+ 
+ 	T(YAFFS_TRACE_CHECKPOINT, (TSTR("checkpoint byte count %d" TENDSTR),
+-			dev->checkpointByteCount));
++			dev->checkpt_byte_count));
+ 
+-	if (dev->checkpointBuffer) {
++	if (dev->checkpt_buffer) {
+ 		/* free the buffer */
+-		YFREE(dev->checkpointBuffer);
+-		dev->checkpointBuffer = NULL;
++		YFREE(dev->checkpt_buffer);
++		dev->checkpt_buffer = NULL;
+ 		return 1;
+ 	} else
+ 		return 0;
+ }
+ 
+-int yaffs_CheckpointInvalidateStream(yaffs_Device *dev)
++int yaffs2_checkpt_invalidate_stream(yaffs_dev_t *dev)
+ {
+-	/* Erase the first checksum block */
+-
+-	T(YAFFS_TRACE_CHECKPOINT, (TSTR("checkpoint invalidate"TENDSTR)));
++	/* Erase the checkpoint data */
+ 
+-	if (!yaffs_CheckpointSpaceOk(dev))
+-		return 0;
++	T(YAFFS_TRACE_CHECKPOINT, (TSTR("checkpoint invalidate of %d blocks"TENDSTR),
++		dev->blocks_in_checkpt));
+ 
+-	return yaffs_CheckpointErase(dev);
++	return yaffs_checkpt_erase(dev);
+ }
+ 
+ 
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffs_checkptrw.h linux-2.6.36-rc8.new/fs/yaffs2/yaffs_checkptrw.h
+--- linux-2.6.36-rc8/fs/yaffs2/yaffs_checkptrw.h	2010-10-20 13:17:58.941000294 +0300
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffs_checkptrw.h	2010-10-20 13:28:16.058000294 +0300
+@@ -1,7 +1,7 @@
+ /*
+  * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+  *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+  *   for Toby Churchill Ltd and Brightstar Engineering
+  *
+  * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -18,18 +18,17 @@
+ 
+ #include "yaffs_guts.h"
+ 
+-int yaffs_CheckpointOpen(yaffs_Device *dev, int forWriting);
++int yaffs2_checkpt_open(yaffs_dev_t *dev, int forWriting);
+ 
+-int yaffs_CheckpointWrite(yaffs_Device *dev, const void *data, int nBytes);
++int yaffs2_checkpt_wr(yaffs_dev_t *dev, const void *data, int n_bytes);
+ 
+-int yaffs_CheckpointRead(yaffs_Device *dev, void *data, int nBytes);
++int yaffs2_checkpt_rd(yaffs_dev_t *dev, void *data, int n_bytes);
+ 
+-int yaffs_GetCheckpointSum(yaffs_Device *dev, __u32 *sum);
++int yaffs2_get_checkpt_sum(yaffs_dev_t *dev, __u32 *sum);
+ 
+-int yaffs_CheckpointClose(yaffs_Device *dev);
++int yaffs_checkpt_close(yaffs_dev_t *dev);
+ 
+-int yaffs_CheckpointInvalidateStream(yaffs_Device *dev);
++int yaffs2_checkpt_invalidate_stream(yaffs_dev_t *dev);
+ 
+ 
+ #endif
+-
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffs_ecc.c linux-2.6.36-rc8.new/fs/yaffs2/yaffs_ecc.c
+--- linux-2.6.36-rc8/fs/yaffs2/yaffs_ecc.c	2010-10-20 13:17:58.942000294 +0300
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffs_ecc.c	2010-10-20 13:28:16.025000294 +0300
+@@ -1,7 +1,7 @@
+ /*
+  * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+  *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+  *   for Toby Churchill Ltd and Brightstar Engineering
+  *
+  * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -28,9 +28,6 @@
+  * this bytes influence on the line parity.
+  */
+ 
+-const char *yaffs_ecc_c_version =
+-	"$Id: yaffs_ecc.c,v 1.11 2009-03-06 17:20:50 wookey Exp $";
+-
+ #include "yportenv.h"
+ 
+ #include "yaffs_ecc.h"
+@@ -72,7 +69,7 @@ static const unsigned char column_parity
+ 
+ /* Count the bits in an unsigned char or a U32 */
+ 
+-static int yaffs_CountBits(unsigned char x)
++static int yaffs_count_bits(unsigned char x)
+ {
+ 	int r = 0;
+ 	while (x) {
+@@ -83,7 +80,7 @@ static int yaffs_CountBits(unsigned char
+ 	return r;
+ }
+ 
+-static int yaffs_CountBits32(unsigned x)
++static int yaffs_count_bits32(unsigned x)
+ {
+ 	int r = 0;
+ 	while (x) {
+@@ -95,7 +92,7 @@ static int yaffs_CountBits32(unsigned x)
+ }
+ 
+ /* Calculate the ECC for a 256-byte block of data */
+-void yaffs_ECCCalculate(const unsigned char *data, unsigned char *ecc)
++void yaffs_ecc_cacl(const unsigned char *data, unsigned char *ecc)
+ {
+ 	unsigned int i;
+ 
+@@ -166,7 +163,7 @@ void yaffs_ECCCalculate(const unsigned c
+ 
+ /* Correct the ECC on a 256 byte block of data */
+ 
+-int yaffs_ECCCorrect(unsigned char *data, unsigned char *read_ecc,
++int yaffs_ecc_correct(unsigned char *data, unsigned char *read_ecc,
+ 		     const unsigned char *test_ecc)
+ {
+ 	unsigned char d0, d1, d2;	/* deltas */
+@@ -226,9 +223,9 @@ int yaffs_ECCCorrect(unsigned char *data
+ 		return 1; /* Corrected the error */
+ 	}
+ 
+-	if ((yaffs_CountBits(d0) +
+-	     yaffs_CountBits(d1) +
+-	     yaffs_CountBits(d2)) ==  1) {
++	if ((yaffs_count_bits(d0) +
++	     yaffs_count_bits(d1) +
++	     yaffs_count_bits(d2)) ==  1) {
+ 		/* Reccoverable error in ecc */
+ 
+ 		read_ecc[0] = test_ecc[0];
+@@ -248,7 +245,7 @@ int yaffs_ECCCorrect(unsigned char *data
+ /*
+  * ECCxxxOther does ECC calcs on arbitrary n bytes of data
+  */
+-void yaffs_ECCCalculateOther(const unsigned char *data, unsigned nBytes,
++void yaffs_ecc_calc_other(const unsigned char *data, unsigned n_bytes,
+ 				yaffs_ECCOther *eccOther)
+ {
+ 	unsigned int i;
+@@ -258,7 +255,7 @@ void yaffs_ECCCalculateOther(const unsig
+ 	unsigned line_parity_prime = 0;
+ 	unsigned char b;
+ 
+-	for (i = 0; i < nBytes; i++) {
++	for (i = 0; i < n_bytes; i++) {
+ 		b = column_parity_table[*data++];
+ 		col_parity ^= b;
+ 
+@@ -275,7 +272,7 @@ void yaffs_ECCCalculateOther(const unsig
+ 	eccOther->lineParityPrime = line_parity_prime;
+ }
+ 
+-int yaffs_ECCCorrectOther(unsigned char *data, unsigned nBytes,
++int yaffs_ecc_correct_other(unsigned char *data, unsigned n_bytes,
+ 			yaffs_ECCOther *read_ecc,
+ 			const yaffs_ECCOther *test_ecc)
+ {
+@@ -304,7 +301,7 @@ int yaffs_ECCCorrectOther(unsigned char
+ 		if (cDelta & 0x02)
+ 			bit |= 0x01;
+ 
+-		if (lDelta >= nBytes)
++		if (lDelta >= n_bytes)
+ 			return -1;
+ 
+ 		data[lDelta] ^= (1 << bit);
+@@ -312,8 +309,8 @@ int yaffs_ECCCorrectOther(unsigned char
+ 		return 1; /* corrected */
+ 	}
+ 
+-	if ((yaffs_CountBits32(lDelta) + yaffs_CountBits32(lDeltaPrime) +
+-			yaffs_CountBits(cDelta)) == 1) {
++	if ((yaffs_count_bits32(lDelta) + yaffs_count_bits32(lDeltaPrime) +
++			yaffs_count_bits(cDelta)) == 1) {
+ 		/* Reccoverable error in ecc */
+ 
+ 		*read_ecc = *test_ecc;
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffs_ecc.h linux-2.6.36-rc8.new/fs/yaffs2/yaffs_ecc.h
+--- linux-2.6.36-rc8/fs/yaffs2/yaffs_ecc.h	2010-10-20 13:17:58.942000294 +0300
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffs_ecc.h	2010-10-20 13:28:16.058000294 +0300
+@@ -1,7 +1,7 @@
+ /*
+  * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+  *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+  *   for Toby Churchill Ltd and Brightstar Engineering
+  *
+  * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -32,13 +32,13 @@ typedef struct {
+ 	unsigned lineParityPrime;
+ } yaffs_ECCOther;
+ 
+-void yaffs_ECCCalculate(const unsigned char *data, unsigned char *ecc);
+-int yaffs_ECCCorrect(unsigned char *data, unsigned char *read_ecc,
++void yaffs_ecc_cacl(const unsigned char *data, unsigned char *ecc);
++int yaffs_ecc_correct(unsigned char *data, unsigned char *read_ecc,
+ 		const unsigned char *test_ecc);
+ 
+-void yaffs_ECCCalculateOther(const unsigned char *data, unsigned nBytes,
++void yaffs_ecc_calc_other(const unsigned char *data, unsigned n_bytes,
+ 			yaffs_ECCOther *ecc);
+-int yaffs_ECCCorrectOther(unsigned char *data, unsigned nBytes,
++int yaffs_ecc_correct_other(unsigned char *data, unsigned n_bytes,
+ 			yaffs_ECCOther *read_ecc,
+ 			const yaffs_ECCOther *test_ecc);
+ #endif
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffs_fs.c linux-2.6.36-rc8.new/fs/yaffs2/yaffs_fs.c
+--- linux-2.6.36-rc8/fs/yaffs2/yaffs_fs.c	2010-10-20 13:17:58.944000294 +0300
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffs_fs.c	1970-01-01 02:00:00.000000000 +0200
+@@ -1,2529 +0,0 @@
+-/*
+- * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+- *
+- * Copyright (C) 2002-2009 Aleph One Ltd.
+- *   for Toby Churchill Ltd and Brightstar Engineering
+- *
+- * Created by Charles Manning <charles@aleph1.co.uk>
+- * Acknowledgements:
+- * Luc van OostenRyck for numerous patches.
+- * Nick Bane for numerous patches.
+- * Nick Bane for 2.5/2.6 integration.
+- * Andras Toth for mknod rdev issue.
+- * Michael Fischer for finding the problem with inode inconsistency.
+- * Some code bodily lifted from JFFS
+- *
+- * This program is free software; you can redistribute it and/or modify
+- * it under the terms of the GNU General Public License version 2 as
+- * published by the Free Software Foundation.
+- */
+-
+-/*
+- *
+- * This is the file system front-end to YAFFS that hooks it up to
+- * the VFS.
+- *
+- * Special notes:
+- * >> 2.4: sb->u.generic_sbp points to the yaffs_Device associated with
+- *         this superblock
+- * >> 2.6: sb->s_fs_info  points to the yaffs_Device associated with this
+- *         superblock
+- * >> inode->u.generic_ip points to the associated yaffs_Object.
+- */
+-
+-const char *yaffs_fs_c_version =
+-    "$Id: yaffs_fs.c,v 1.79 2009-03-17 01:12:00 wookey Exp $";
+-extern const char *yaffs_guts_c_version;
+-
+-#include <linux/version.h>
+-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
+-#include <linux/config.h>
+-#endif
+-#include <linux/kernel.h>
+-#include <linux/module.h>
+-#include <linux/slab.h>
+-#include <linux/init.h>
+-#include <linux/fs.h>
+-#include <linux/proc_fs.h>
+-#include <linux/smp_lock.h>
+-#include <linux/pagemap.h>
+-#include <linux/mtd/mtd.h>
+-#include <linux/interrupt.h>
+-#include <linux/string.h>
+-#include <linux/ctype.h>
+-
+-#include "asm/div64.h"
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-
+-#include <linux/statfs.h>	/* Added NCB 15-8-2003 */
+-#include <linux/statfs.h>
+-#define UnlockPage(p) unlock_page(p)
+-#define Page_Uptodate(page)	test_bit(PG_uptodate, &(page)->flags)
+-
+-/* FIXME: use sb->s_id instead ? */
+-#define yaffs_devname(sb, buf)	bdevname(sb->s_bdev, buf)
+-
+-#else
+-
+-#include <linux/locks.h>
+-#define	BDEVNAME_SIZE		0
+-#define	yaffs_devname(sb, buf)	kdevname(sb->s_dev)
+-
+-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0))
+-/* added NCB 26/5/2006 for 2.4.25-vrs2-tcl1 kernel */
+-#define __user
+-#endif
+-
+-#endif
+-
+-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26))
+-#define YPROC_ROOT  (&proc_root)
+-#else
+-#define YPROC_ROOT  NULL
+-#endif
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+-#define WRITE_SIZE_STR "writesize"
+-#define WRITE_SIZE(mtd) ((mtd)->writesize)
+-#else
+-#define WRITE_SIZE_STR "oobblock"
+-#define WRITE_SIZE(mtd) ((mtd)->oobblock)
+-#endif
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 27))
+-#define YAFFS_USE_WRITE_BEGIN_END 1
+-#else
+-#define YAFFS_USE_WRITE_BEGIN_END 0
+-#endif
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 28))
+-static uint32_t YCALCBLOCKS(uint64_t partition_size, uint32_t block_size)
+-{
+-	uint64_t result = partition_size;
+-	do_div(result, block_size);
+-	return (uint32_t)result;
+-}
+-#else
+-#define YCALCBLOCKS(s, b) ((s)/(b))
+-#endif
+-
+-#include <linux/uaccess.h>
+-
+-#include "yportenv.h"
+-#include "yaffs_guts.h"
+-
+-#include <linux/mtd/mtd.h>
+-#include "yaffs_mtdif.h"
+-#include "yaffs_mtdif1.h"
+-#include "yaffs_mtdif2.h"
+-
+-unsigned int yaffs_traceMask = YAFFS_TRACE_BAD_BLOCKS;
+-unsigned int yaffs_wr_attempts = YAFFS_WR_ATTEMPTS;
+-unsigned int yaffs_auto_checkpoint = 1;
+-
+-/* Module Parameters */
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-module_param(yaffs_traceMask, uint, 0644);
+-module_param(yaffs_wr_attempts, uint, 0644);
+-module_param(yaffs_auto_checkpoint, uint, 0644);
+-#else
+-MODULE_PARM(yaffs_traceMask, "i");
+-MODULE_PARM(yaffs_wr_attempts, "i");
+-MODULE_PARM(yaffs_auto_checkpoint, "i");
+-#endif
+-
+-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25))
+-/* use iget and read_inode */
+-#define Y_IGET(sb, inum) iget((sb), (inum))
+-static void yaffs_read_inode(struct inode *inode);
+-
+-#else
+-/* Call local equivalent */
+-#define YAFFS_USE_OWN_IGET
+-#define Y_IGET(sb, inum) yaffs_iget((sb), (inum))
+-
+-static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino);
+-#endif
+-
+-/*#define T(x) printk x */
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
+-#define yaffs_InodeToObjectLV(iptr) ((iptr)->i_private)
+-#else
+-#define yaffs_InodeToObjectLV(iptr) ((iptr)->u.generic_ip)
+-#endif
+-
+-#define yaffs_InodeToObject(iptr) ((yaffs_Object *)(yaffs_InodeToObjectLV(iptr)))
+-#define yaffs_DentryToObject(dptr) yaffs_InodeToObject((dptr)->d_inode)
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-#define yaffs_SuperToDevice(sb)	((yaffs_Device *)sb->s_fs_info)
+-#else
+-#define yaffs_SuperToDevice(sb)	((yaffs_Device *)sb->u.generic_sbp)
+-#endif
+-
+-static void yaffs_put_super(struct super_block *sb);
+-
+-static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
+-				loff_t *pos);
+-static ssize_t yaffs_hold_space(struct file *f);
+-static void yaffs_release_space(struct file *f);
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+-static int yaffs_file_flush(struct file *file, fl_owner_t id);
+-#else
+-static int yaffs_file_flush(struct file *file);
+-#endif
+-
+-static int yaffs_sync_object(struct file *file, struct dentry *dentry,
+-				int datasync);
+-
+-static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir);
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
+-			struct nameidata *n);
+-static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
+-					struct nameidata *n);
+-#else
+-static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode);
+-static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry);
+-#endif
+-static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
+-			struct dentry *dentry);
+-static int yaffs_unlink(struct inode *dir, struct dentry *dentry);
+-static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
+-			const char *symname);
+-static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode);
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
+-			dev_t dev);
+-#else
+-static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
+-			int dev);
+-#endif
+-static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
+-			struct inode *new_dir, struct dentry *new_dentry);
+-static int yaffs_setattr(struct dentry *dentry, struct iattr *attr);
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+-static int yaffs_sync_fs(struct super_block *sb, int wait);
+-static void yaffs_write_super(struct super_block *sb);
+-#else
+-static int yaffs_sync_fs(struct super_block *sb);
+-static int yaffs_write_super(struct super_block *sb);
+-#endif
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+-static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf);
+-#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf);
+-#else
+-static int yaffs_statfs(struct super_block *sb, struct statfs *buf);
+-#endif
+-
+-#ifdef YAFFS_HAS_PUT_INODE
+-static void yaffs_put_inode(struct inode *inode);
+-#endif
+-
+-static void yaffs_delete_inode(struct inode *);
+-static void yaffs_clear_inode(struct inode *);
+-
+-static int yaffs_readpage(struct file *file, struct page *page);
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-static int yaffs_writepage(struct page *page, struct writeback_control *wbc);
+-#else
+-static int yaffs_writepage(struct page *page);
+-#endif
+-
+-
+-#if (YAFFS_USE_WRITE_BEGIN_END != 0)
+-static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
+-				loff_t pos, unsigned len, unsigned flags,
+-				struct page **pagep, void **fsdata);
+-static int yaffs_write_end(struct file *filp, struct address_space *mapping,
+-				loff_t pos, unsigned len, unsigned copied,
+-				struct page *pg, void *fsdadata);
+-#else
+-static int yaffs_prepare_write(struct file *f, struct page *pg,
+-				unsigned offset, unsigned to);
+-static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
+-				unsigned to);
+-
+-#endif
+-
+-static int yaffs_readlink(struct dentry *dentry, char __user *buffer,
+-				int buflen);
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
+-static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
+-#else
+-static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
+-#endif
+-
+-static struct address_space_operations yaffs_file_address_operations = {
+-	.readpage = yaffs_readpage,
+-	.writepage = yaffs_writepage,
+-#if (YAFFS_USE_WRITE_BEGIN_END > 0)
+-	.write_begin = yaffs_write_begin,
+-	.write_end = yaffs_write_end,
+-#else
+-	.prepare_write = yaffs_prepare_write,
+-	.commit_write = yaffs_commit_write,
+-#endif
+-};
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 22))
+-static const struct file_operations yaffs_file_operations = {
+-	.read = do_sync_read,
+-	.write = do_sync_write,
+-	.aio_read = generic_file_aio_read,
+-	.aio_write = generic_file_aio_write,
+-	.mmap = generic_file_mmap,
+-	.flush = yaffs_file_flush,
+-	.fsync = yaffs_sync_object,
+-	.splice_read = generic_file_splice_read,
+-	.splice_write = generic_file_splice_write,
+-	.llseek = generic_file_llseek,
+-};
+-
+-#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
+-
+-static const struct file_operations yaffs_file_operations = {
+-	.read = do_sync_read,
+-	.write = do_sync_write,
+-	.aio_read = generic_file_aio_read,
+-	.aio_write = generic_file_aio_write,
+-	.mmap = generic_file_mmap,
+-	.flush = yaffs_file_flush,
+-	.fsync = yaffs_sync_object,
+-	.sendfile = generic_file_sendfile,
+-};
+-
+-#else
+-
+-static const struct file_operations yaffs_file_operations = {
+-	.read = generic_file_read,
+-	.write = generic_file_write,
+-	.mmap = generic_file_mmap,
+-	.flush = yaffs_file_flush,
+-	.fsync = yaffs_sync_object,
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-	.sendfile = generic_file_sendfile,
+-#endif
+-};
+-#endif
+-
+-static const struct inode_operations yaffs_file_inode_operations = {
+-	.setattr = yaffs_setattr,
+-};
+-
+-static const struct inode_operations yaffs_symlink_inode_operations = {
+-	.readlink = yaffs_readlink,
+-	.follow_link = yaffs_follow_link,
+-	.setattr = yaffs_setattr,
+-};
+-
+-static const struct inode_operations yaffs_dir_inode_operations = {
+-	.create = yaffs_create,
+-	.lookup = yaffs_lookup,
+-	.link = yaffs_link,
+-	.unlink = yaffs_unlink,
+-	.symlink = yaffs_symlink,
+-	.mkdir = yaffs_mkdir,
+-	.rmdir = yaffs_unlink,
+-	.mknod = yaffs_mknod,
+-	.rename = yaffs_rename,
+-	.setattr = yaffs_setattr,
+-};
+-
+-static const struct file_operations yaffs_dir_operations = {
+-	.read = generic_read_dir,
+-	.readdir = yaffs_readdir,
+-	.fsync = yaffs_sync_object,
+-};
+-
+-static const struct super_operations yaffs_super_ops = {
+-	.statfs = yaffs_statfs,
+-
+-#ifndef YAFFS_USE_OWN_IGET
+-	.read_inode = yaffs_read_inode,
+-#endif
+-#ifdef YAFFS_HAS_PUT_INODE
+-	.put_inode = yaffs_put_inode,
+-#endif
+-	.put_super = yaffs_put_super,
+-	.delete_inode = yaffs_delete_inode,
+-	.clear_inode = yaffs_clear_inode,
+-	.sync_fs = yaffs_sync_fs,
+-	.write_super = yaffs_write_super,
+-};
+-
+-static void yaffs_GrossLock(yaffs_Device *dev)
+-{
+-	T(YAFFS_TRACE_OS, ("yaffs locking %p\n", current));
+-	down(&dev->grossLock);
+-	T(YAFFS_TRACE_OS, ("yaffs locked %p\n", current));
+-}
+-
+-static void yaffs_GrossUnlock(yaffs_Device *dev)
+-{
+-	T(YAFFS_TRACE_OS, ("yaffs unlocking %p\n", current));
+-	up(&dev->grossLock);
+-}
+-
+-static int yaffs_readlink(struct dentry *dentry, char __user *buffer,
+-			int buflen)
+-{
+-	unsigned char *alias;
+-	int ret;
+-
+-	yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
+-
+-	yaffs_GrossLock(dev);
+-
+-	alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry));
+-
+-	yaffs_GrossUnlock(dev);
+-
+-	if (!alias)
+-		return -ENOMEM;
+-
+-	ret = vfs_readlink(dentry, buffer, buflen, alias);
+-	kfree(alias);
+-	return ret;
+-}
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
+-static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
+-#else
+-static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
+-#endif
+-{
+-	unsigned char *alias;
+-	int ret;
+-	yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
+-
+-	yaffs_GrossLock(dev);
+-
+-	alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry));
+-
+-	yaffs_GrossUnlock(dev);
+-
+-	if (!alias) {
+-		ret = -ENOMEM;
+-		goto out;
+-	}
+-
+-	ret = vfs_follow_link(nd, alias);
+-	kfree(alias);
+-out:
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
+-	return ERR_PTR(ret);
+-#else
+-	return ret;
+-#endif
+-}
+-
+-struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
+-				yaffs_Object *obj);
+-
+-/*
+- * Lookup is used to find objects in the fs
+- */
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-
+-static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
+-				struct nameidata *n)
+-#else
+-static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry)
+-#endif
+-{
+-	yaffs_Object *obj;
+-	struct inode *inode = NULL;	/* NCB 2.5/2.6 needs NULL here */
+-
+-	yaffs_Device *dev = yaffs_InodeToObject(dir)->myDev;
+-
+-	yaffs_GrossLock(dev);
+-
+-	T(YAFFS_TRACE_OS,
+-		("yaffs_lookup for %d:%s\n",
+-		yaffs_InodeToObject(dir)->objectId, dentry->d_name.name));
+-
+-	obj = yaffs_FindObjectByName(yaffs_InodeToObject(dir),
+-					dentry->d_name.name);
+-
+-	obj = yaffs_GetEquivalentObject(obj);	/* in case it was a hardlink */
+-
+-	/* Can't hold gross lock when calling yaffs_get_inode() */
+-	yaffs_GrossUnlock(dev);
+-
+-	if (obj) {
+-		T(YAFFS_TRACE_OS,
+-			("yaffs_lookup found %d\n", obj->objectId));
+-
+-		inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
+-
+-		if (inode) {
+-			T(YAFFS_TRACE_OS,
+-				("yaffs_loookup dentry \n"));
+-/* #if 0 asserted by NCB for 2.5/6 compatability - falls through to
+- * d_add even if NULL inode */
+-#if 0
+-			/*dget(dentry); // try to solve directory bug */
+-			d_add(dentry, inode);
+-
+-			/* return dentry; */
+-			return NULL;
+-#endif
+-		}
+-
+-	} else {
+-		T(YAFFS_TRACE_OS, ("yaffs_lookup not found\n"));
+-
+-	}
+-
+-/* added NCB for 2.5/6 compatability - forces add even if inode is
+- * NULL which creates dentry hash */
+-	d_add(dentry, inode);
+-
+-	return NULL;
+-}
+-
+-
+-#ifdef YAFFS_HAS_PUT_INODE
+-
+-/* For now put inode is just for debugging
+- * Put inode is called when the inode **structure** is put.
+- */
+-static void yaffs_put_inode(struct inode *inode)
+-{
+-	T(YAFFS_TRACE_OS,
+-		("yaffs_put_inode: ino %d, count %d\n", (int)inode->i_ino,
+-		atomic_read(&inode->i_count)));
+-
+-}
+-#endif
+-
+-/* clear is called to tell the fs to release any per-inode data it holds */
+-static void yaffs_clear_inode(struct inode *inode)
+-{
+-	yaffs_Object *obj;
+-	yaffs_Device *dev;
+-
+-	obj = yaffs_InodeToObject(inode);
+-
+-	T(YAFFS_TRACE_OS,
+-		("yaffs_clear_inode: ino %d, count %d %s\n", (int)inode->i_ino,
+-		atomic_read(&inode->i_count),
+-		obj ? "object exists" : "null object"));
+-
+-	if (obj) {
+-		dev = obj->myDev;
+-		yaffs_GrossLock(dev);
+-
+-		/* Clear the association between the inode and
+-		 * the yaffs_Object.
+-		 */
+-		obj->myInode = NULL;
+-		yaffs_InodeToObjectLV(inode) = NULL;
+-
+-		/* If the object freeing was deferred, then the real
+-		 * free happens now.
+-		 * This should fix the inode inconsistency problem.
+-		 */
+-
+-		yaffs_HandleDeferedFree(obj);
+-
+-		yaffs_GrossUnlock(dev);
+-	}
+-
+-}
+-
+-/* delete is called when the link count is zero and the inode
+- * is put (ie. nobody wants to know about it anymore, time to
+- * delete the file).
+- * NB Must call clear_inode()
+- */
+-static void yaffs_delete_inode(struct inode *inode)
+-{
+-	yaffs_Object *obj = yaffs_InodeToObject(inode);
+-	yaffs_Device *dev;
+-
+-	T(YAFFS_TRACE_OS,
+-		("yaffs_delete_inode: ino %d, count %d %s\n", (int)inode->i_ino,
+-		atomic_read(&inode->i_count),
+-		obj ? "object exists" : "null object"));
+-
+-	if (obj) {
+-		dev = obj->myDev;
+-		yaffs_GrossLock(dev);
+-		yaffs_DeleteObject(obj);
+-		yaffs_GrossUnlock(dev);
+-	}
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
+-	truncate_inode_pages(&inode->i_data, 0);
+-#endif
+-	clear_inode(inode);
+-}
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+-static int yaffs_file_flush(struct file *file, fl_owner_t id)
+-#else
+-static int yaffs_file_flush(struct file *file)
+-#endif
+-{
+-	yaffs_Object *obj = yaffs_DentryToObject(file->f_dentry);
+-
+-	yaffs_Device *dev = obj->myDev;
+-
+-	T(YAFFS_TRACE_OS,
+-		("yaffs_file_flush object %d (%s)\n", obj->objectId,
+-		obj->dirty ? "dirty" : "clean"));
+-
+-	yaffs_GrossLock(dev);
+-
+-	yaffs_FlushFile(obj, 1);
+-
+-	yaffs_GrossUnlock(dev);
+-
+-	return 0;
+-}
+-
+-static int yaffs_readpage_nolock(struct file *f, struct page *pg)
+-{
+-	/* Lifted from jffs2 */
+-
+-	yaffs_Object *obj;
+-	unsigned char *pg_buf;
+-	int ret;
+-
+-	yaffs_Device *dev;
+-
+-	T(YAFFS_TRACE_OS, ("yaffs_readpage at %08x, size %08x\n",
+-			(unsigned)(pg->index << PAGE_CACHE_SHIFT),
+-			(unsigned)PAGE_CACHE_SIZE));
+-
+-	obj = yaffs_DentryToObject(f->f_dentry);
+-
+-	dev = obj->myDev;
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-	BUG_ON(!PageLocked(pg));
+-#else
+-	if (!PageLocked(pg))
+-		PAGE_BUG(pg);
+-#endif
+-
+-	pg_buf = kmap(pg);
+-	/* FIXME: Can kmap fail? */
+-
+-	yaffs_GrossLock(dev);
+-
+-	ret = yaffs_ReadDataFromFile(obj, pg_buf,
+-				pg->index << PAGE_CACHE_SHIFT,
+-				PAGE_CACHE_SIZE);
+-
+-	yaffs_GrossUnlock(dev);
+-
+-	if (ret >= 0)
+-		ret = 0;
+-
+-	if (ret) {
+-		ClearPageUptodate(pg);
+-		SetPageError(pg);
+-	} else {
+-		SetPageUptodate(pg);
+-		ClearPageError(pg);
+-	}
+-
+-	flush_dcache_page(pg);
+-	kunmap(pg);
+-
+-	T(YAFFS_TRACE_OS, ("yaffs_readpage done\n"));
+-	return ret;
+-}
+-
+-static int yaffs_readpage_unlock(struct file *f, struct page *pg)
+-{
+-	int ret = yaffs_readpage_nolock(f, pg);
+-	UnlockPage(pg);
+-	return ret;
+-}
+-
+-static int yaffs_readpage(struct file *f, struct page *pg)
+-{
+-	return yaffs_readpage_unlock(f, pg);
+-}
+-
+-/* writepage inspired by/stolen from smbfs */
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-static int yaffs_writepage(struct page *page, struct writeback_control *wbc)
+-#else
+-static int yaffs_writepage(struct page *page)
+-#endif
+-{
+-	struct address_space *mapping = page->mapping;
+-	loff_t offset = (loff_t) page->index << PAGE_CACHE_SHIFT;
+-	struct inode *inode;
+-	unsigned long end_index;
+-	char *buffer;
+-	yaffs_Object *obj;
+-	int nWritten = 0;
+-	unsigned nBytes;
+-
+-	if (!mapping)
+-		BUG();
+-	inode = mapping->host;
+-	if (!inode)
+-		BUG();
+-
+-	if (offset > inode->i_size) {
+-		T(YAFFS_TRACE_OS,
+-			("yaffs_writepage at %08x, inode size = %08x!!!\n",
+-			(unsigned)(page->index << PAGE_CACHE_SHIFT),
+-			(unsigned)inode->i_size));
+-		T(YAFFS_TRACE_OS,
+-			("                -> don't care!!\n"));
+-		unlock_page(page);
+-		return 0;
+-	}
+-
+-	end_index = inode->i_size >> PAGE_CACHE_SHIFT;
+-
+-	/* easy case */
+-	if (page->index < end_index)
+-		nBytes = PAGE_CACHE_SIZE;
+-	else
+-		nBytes = inode->i_size & (PAGE_CACHE_SIZE - 1);
+-
+-	get_page(page);
+-
+-	buffer = kmap(page);
+-
+-	obj = yaffs_InodeToObject(inode);
+-	yaffs_GrossLock(obj->myDev);
+-
+-	T(YAFFS_TRACE_OS,
+-		("yaffs_writepage at %08x, size %08x\n",
+-		(unsigned)(page->index << PAGE_CACHE_SHIFT), nBytes));
+-	T(YAFFS_TRACE_OS,
+-		("writepag0: obj = %05x, ino = %05x\n",
+-		(int)obj->variant.fileVariant.fileSize, (int)inode->i_size));
+-
+-	nWritten = yaffs_WriteDataToFile(obj, buffer,
+-			page->index << PAGE_CACHE_SHIFT, nBytes, 0);
+-
+-	T(YAFFS_TRACE_OS,
+-		("writepag1: obj = %05x, ino = %05x\n",
+-		(int)obj->variant.fileVariant.fileSize, (int)inode->i_size));
+-
+-	yaffs_GrossUnlock(obj->myDev);
+-
+-	kunmap(page);
+-	SetPageUptodate(page);
+-	UnlockPage(page);
+-	put_page(page);
+-
+-	return (nWritten == nBytes) ? 0 : -ENOSPC;
+-}
+-
+-
+-#if (YAFFS_USE_WRITE_BEGIN_END > 0)
+-static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
+-				loff_t pos, unsigned len, unsigned flags,
+-				struct page **pagep, void **fsdata)
+-{
+-	struct page *pg = NULL;
+-	pgoff_t index = pos >> PAGE_CACHE_SHIFT;
+-	uint32_t offset = pos & (PAGE_CACHE_SIZE - 1);
+-	uint32_t to = offset + len;
+-
+-	int ret = 0;
+-	int space_held = 0;
+-
+-	T(YAFFS_TRACE_OS, ("start yaffs_write_begin\n"));
+-	/* Get a page */
+-#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 28)
+-	pg = grab_cache_page_write_begin(mapping, index, flags);
+-#else
+-	pg = __grab_cache_page(mapping, index);
+-#endif
+-
+-	*pagep = pg;
+-	if (!pg) {
+-		ret =  -ENOMEM;
+-		goto out;
+-	}
+-	/* Get fs space */
+-	space_held = yaffs_hold_space(filp);
+-
+-	if (!space_held) {
+-		ret = -ENOSPC;
+-		goto out;
+-	}
+-
+-	/* Update page if required */
+-
+-	if (!Page_Uptodate(pg) && (offset || to < PAGE_CACHE_SIZE))
+-		ret = yaffs_readpage_nolock(filp, pg);
+-
+-	if (ret)
+-		goto out;
+-
+-	/* Happy path return */
+-	T(YAFFS_TRACE_OS, ("end yaffs_write_begin - ok\n"));
+-
+-	return 0;
+-
+-out:
+-	T(YAFFS_TRACE_OS, ("end yaffs_write_begin fail returning %d\n", ret));
+-	if (space_held)
+-		yaffs_release_space(filp);
+-	if (pg) {
+-		unlock_page(pg);
+-		page_cache_release(pg);
+-	}
+-	return ret;
+-}
+-
+-#else
+-
+-static int yaffs_prepare_write(struct file *f, struct page *pg,
+-				unsigned offset, unsigned to)
+-{
+-	T(YAFFS_TRACE_OS, ("yaffs_prepair_write\n"));
+-
+-	if (!Page_Uptodate(pg) && (offset || to < PAGE_CACHE_SIZE))
+-		return yaffs_readpage_nolock(f, pg);
+-	return 0;
+-}
+-#endif
+-
+-#if (YAFFS_USE_WRITE_BEGIN_END > 0)
+-static int yaffs_write_end(struct file *filp, struct address_space *mapping,
+-				loff_t pos, unsigned len, unsigned copied,
+-				struct page *pg, void *fsdadata)
+-{
+-	int ret = 0;
+-	void *addr, *kva;
+-	uint32_t offset_into_page = pos & (PAGE_CACHE_SIZE - 1);
+-
+-	kva = kmap(pg);
+-	addr = kva + offset_into_page;
+-
+-	T(YAFFS_TRACE_OS,
+-		("yaffs_write_end addr %x pos %x nBytes %d\n",
+-		(unsigned) addr,
+-		(int)pos, copied));
+-
+-	ret = yaffs_file_write(filp, addr, copied, &pos);
+-
+-	if (ret != copied) {
+-		T(YAFFS_TRACE_OS,
+-			("yaffs_write_end not same size ret %d  copied %d\n",
+-			ret, copied));
+-		SetPageError(pg);
+-		ClearPageUptodate(pg);
+-	} else {
+-		SetPageUptodate(pg);
+-	}
+-
+-	kunmap(pg);
+-
+-	yaffs_release_space(filp);
+-	unlock_page(pg);
+-	page_cache_release(pg);
+-	return ret;
+-}
+-#else
+-
+-static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
+-				unsigned to)
+-{
+-	void *addr, *kva;
+-
+-	loff_t pos = (((loff_t) pg->index) << PAGE_CACHE_SHIFT) + offset;
+-	int nBytes = to - offset;
+-	int nWritten;
+-
+-	unsigned spos = pos;
+-	unsigned saddr;
+-
+-	kva = kmap(pg);
+-	addr = kva + offset;
+-
+-	saddr = (unsigned) addr;
+-
+-	T(YAFFS_TRACE_OS,
+-		("yaffs_commit_write addr %x pos %x nBytes %d\n",
+-		saddr, spos, nBytes));
+-
+-	nWritten = yaffs_file_write(f, addr, nBytes, &pos);
+-
+-	if (nWritten != nBytes) {
+-		T(YAFFS_TRACE_OS,
+-			("yaffs_commit_write not same size nWritten %d  nBytes %d\n",
+-			nWritten, nBytes));
+-		SetPageError(pg);
+-		ClearPageUptodate(pg);
+-	} else {
+-		SetPageUptodate(pg);
+-	}
+-
+-	kunmap(pg);
+-
+-	T(YAFFS_TRACE_OS,
+-		("yaffs_commit_write returning %d\n",
+-		nWritten == nBytes ? 0 : nWritten));
+-
+-	return nWritten == nBytes ? 0 : nWritten;
+-}
+-#endif
+-
+-
+-static void yaffs_FillInodeFromObject(struct inode *inode, yaffs_Object *obj)
+-{
+-	if (inode && obj) {
+-
+-
+-		/* Check mode against the variant type and attempt to repair if broken. */
+-		__u32 mode = obj->yst_mode;
+-		switch (obj->variantType) {
+-		case YAFFS_OBJECT_TYPE_FILE:
+-			if (!S_ISREG(mode)) {
+-				obj->yst_mode &= ~S_IFMT;
+-				obj->yst_mode |= S_IFREG;
+-			}
+-
+-			break;
+-		case YAFFS_OBJECT_TYPE_SYMLINK:
+-			if (!S_ISLNK(mode)) {
+-				obj->yst_mode &= ~S_IFMT;
+-				obj->yst_mode |= S_IFLNK;
+-			}
+-
+-			break;
+-		case YAFFS_OBJECT_TYPE_DIRECTORY:
+-			if (!S_ISDIR(mode)) {
+-				obj->yst_mode &= ~S_IFMT;
+-				obj->yst_mode |= S_IFDIR;
+-			}
+-
+-			break;
+-		case YAFFS_OBJECT_TYPE_UNKNOWN:
+-		case YAFFS_OBJECT_TYPE_HARDLINK:
+-		case YAFFS_OBJECT_TYPE_SPECIAL:
+-		default:
+-			/* TODO? */
+-			break;
+-		}
+-
+-		inode->i_flags |= S_NOATIME;
+-
+-		inode->i_ino = obj->objectId;
+-		inode->i_mode = obj->yst_mode;
+-		inode->i_uid = obj->yst_uid;
+-		inode->i_gid = obj->yst_gid;
+-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
+-		inode->i_blksize = inode->i_sb->s_blocksize;
+-#endif
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-
+-		inode->i_rdev = old_decode_dev(obj->yst_rdev);
+-		inode->i_atime.tv_sec = (time_t) (obj->yst_atime);
+-		inode->i_atime.tv_nsec = 0;
+-		inode->i_mtime.tv_sec = (time_t) obj->yst_mtime;
+-		inode->i_mtime.tv_nsec = 0;
+-		inode->i_ctime.tv_sec = (time_t) obj->yst_ctime;
+-		inode->i_ctime.tv_nsec = 0;
+-#else
+-		inode->i_rdev = obj->yst_rdev;
+-		inode->i_atime = obj->yst_atime;
+-		inode->i_mtime = obj->yst_mtime;
+-		inode->i_ctime = obj->yst_ctime;
+-#endif
+-		inode->i_size = yaffs_GetObjectFileLength(obj);
+-		inode->i_blocks = (inode->i_size + 511) >> 9;
+-
+-		inode->i_nlink = yaffs_GetObjectLinkCount(obj);
+-
+-		T(YAFFS_TRACE_OS,
+-			("yaffs_FillInode mode %x uid %d gid %d size %d count %d\n",
+-			inode->i_mode, inode->i_uid, inode->i_gid,
+-			(int)inode->i_size, atomic_read(&inode->i_count)));
+-
+-		switch (obj->yst_mode & S_IFMT) {
+-		default:	/* fifo, device or socket */
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-			init_special_inode(inode, obj->yst_mode,
+-					old_decode_dev(obj->yst_rdev));
+-#else
+-			init_special_inode(inode, obj->yst_mode,
+-					(dev_t) (obj->yst_rdev));
+-#endif
+-			break;
+-		case S_IFREG:	/* file */
+-			inode->i_op = &yaffs_file_inode_operations;
+-			inode->i_fop = &yaffs_file_operations;
+-			inode->i_mapping->a_ops =
+-				&yaffs_file_address_operations;
+-			break;
+-		case S_IFDIR:	/* directory */
+-			inode->i_op = &yaffs_dir_inode_operations;
+-			inode->i_fop = &yaffs_dir_operations;
+-			break;
+-		case S_IFLNK:	/* symlink */
+-			inode->i_op = &yaffs_symlink_inode_operations;
+-			break;
+-		}
+-
+-		yaffs_InodeToObjectLV(inode) = obj;
+-
+-		obj->myInode = inode;
+-
+-	} else {
+-		T(YAFFS_TRACE_OS,
+-			("yaffs_FileInode invalid parameters\n"));
+-	}
+-
+-}
+-
+-struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
+-				yaffs_Object *obj)
+-{
+-	struct inode *inode;
+-
+-	if (!sb) {
+-		T(YAFFS_TRACE_OS,
+-			("yaffs_get_inode for NULL super_block!!\n"));
+-		return NULL;
+-
+-	}
+-
+-	if (!obj) {
+-		T(YAFFS_TRACE_OS,
+-			("yaffs_get_inode for NULL object!!\n"));
+-		return NULL;
+-
+-	}
+-
+-	T(YAFFS_TRACE_OS,
+-		("yaffs_get_inode for object %d\n", obj->objectId));
+-
+-	inode = Y_IGET(sb, obj->objectId);
+-	if (IS_ERR(inode))
+-		return NULL;
+-
+-	/* NB Side effect: iget calls back to yaffs_read_inode(). */
+-	/* iget also increments the inode's i_count */
+-	/* NB You can't be holding grossLock or deadlock will happen! */
+-
+-	return inode;
+-}
+-
+-static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
+-				loff_t *pos)
+-{
+-	yaffs_Object *obj;
+-	int nWritten, ipos;
+-	struct inode *inode;
+-	yaffs_Device *dev;
+-
+-	obj = yaffs_DentryToObject(f->f_dentry);
+-
+-	dev = obj->myDev;
+-
+-	yaffs_GrossLock(dev);
+-
+-	inode = f->f_dentry->d_inode;
+-
+-	if (!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND)
+-		ipos = inode->i_size;
+-	else
+-		ipos = *pos;
+-
+-	if (!obj)
+-		T(YAFFS_TRACE_OS,
+-			("yaffs_file_write: hey obj is null!\n"));
+-	else
+-		T(YAFFS_TRACE_OS,
+-			("yaffs_file_write about to write writing %zu bytes"
+-			"to object %d at %d\n",
+-			n, obj->objectId, ipos));
+-
+-	nWritten = yaffs_WriteDataToFile(obj, buf, ipos, n, 0);
+-
+-	T(YAFFS_TRACE_OS,
+-		("yaffs_file_write writing %zu bytes, %d written at %d\n",
+-		n, nWritten, ipos));
+-
+-	if (nWritten > 0) {
+-		ipos += nWritten;
+-		*pos = ipos;
+-		if (ipos > inode->i_size) {
+-			inode->i_size = ipos;
+-			inode->i_blocks = (ipos + 511) >> 9;
+-
+-			T(YAFFS_TRACE_OS,
+-				("yaffs_file_write size updated to %d bytes, "
+-				"%d blocks\n",
+-				ipos, (int)(inode->i_blocks)));
+-		}
+-
+-	}
+-	yaffs_GrossUnlock(dev);
+-	return nWritten == 0 ? -ENOSPC : nWritten;
+-}
+-
+-/* Space holding and freeing is done to ensure we have space available for write_begin/end */
+-/* For now we just assume few parallel writes and check against a small number. */
+-/* Todo: need to do this with a counter to handle parallel reads better */
+-
+-static ssize_t yaffs_hold_space(struct file *f)
+-{
+-	yaffs_Object *obj;
+-	yaffs_Device *dev;
+-
+-	int nFreeChunks;
+-
+-
+-	obj = yaffs_DentryToObject(f->f_dentry);
+-
+-	dev = obj->myDev;
+-
+-	yaffs_GrossLock(dev);
+-
+-	nFreeChunks = yaffs_GetNumberOfFreeChunks(dev);
+-
+-	yaffs_GrossUnlock(dev);
+-
+-	return (nFreeChunks > 20) ? 1 : 0;
+-}
+-
+-static void yaffs_release_space(struct file *f)
+-{
+-	yaffs_Object *obj;
+-	yaffs_Device *dev;
+-
+-
+-	obj = yaffs_DentryToObject(f->f_dentry);
+-
+-	dev = obj->myDev;
+-
+-	yaffs_GrossLock(dev);
+-
+-
+-	yaffs_GrossUnlock(dev);
+-}
+-
+-static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
+-{
+-	yaffs_Object *obj;
+-	yaffs_Device *dev;
+-	struct inode *inode = f->f_dentry->d_inode;
+-	unsigned long offset, curoffs;
+-	struct ylist_head *i;
+-	yaffs_Object *l;
+-
+-	char name[YAFFS_MAX_NAME_LENGTH + 1];
+-
+-	obj = yaffs_DentryToObject(f->f_dentry);
+-	dev = obj->myDev;
+-
+-	yaffs_GrossLock(dev);
+-
+-	offset = f->f_pos;
+-
+-	T(YAFFS_TRACE_OS, ("yaffs_readdir: starting at %d\n", (int)offset));
+-
+-	if (offset == 0) {
+-		T(YAFFS_TRACE_OS,
+-			("yaffs_readdir: entry . ino %d \n",
+-			(int)inode->i_ino));
+-		if (filldir(dirent, ".", 1, offset, inode->i_ino, DT_DIR) < 0)
+-			goto out;
+-		offset++;
+-		f->f_pos++;
+-	}
+-	if (offset == 1) {
+-		T(YAFFS_TRACE_OS,
+-			("yaffs_readdir: entry .. ino %d \n",
+-			(int)f->f_dentry->d_parent->d_inode->i_ino));
+-		if (filldir(dirent, "..", 2, offset,
+-			f->f_dentry->d_parent->d_inode->i_ino, DT_DIR) < 0)
+-			goto out;
+-		offset++;
+-		f->f_pos++;
+-	}
+-
+-	curoffs = 1;
+-
+-	/* If the directory has changed since the open or last call to
+-	   readdir, rewind to after the 2 canned entries. */
+-
+-	if (f->f_version != inode->i_version) {
+-		offset = 2;
+-		f->f_pos = offset;
+-		f->f_version = inode->i_version;
+-	}
+-
+-	ylist_for_each(i, &obj->variant.directoryVariant.children) {
+-		curoffs++;
+-		if (curoffs >= offset) {
+-			l = ylist_entry(i, yaffs_Object, siblings);
+-
+-			yaffs_GetObjectName(l, name,
+-					    YAFFS_MAX_NAME_LENGTH + 1);
+-			T(YAFFS_TRACE_OS,
+-			  ("yaffs_readdir: %s inode %d\n", name,
+-			   yaffs_GetObjectInode(l)));
+-
+-			if (filldir(dirent,
+-					name,
+-					strlen(name),
+-					offset,
+-					yaffs_GetObjectInode(l),
+-					yaffs_GetObjectType(l)) < 0)
+-				goto up_and_out;
+-
+-			offset++;
+-			f->f_pos++;
+-		}
+-	}
+-
+-up_and_out:
+-out:
+-	yaffs_GrossUnlock(dev);
+-
+-	return 0;
+-}
+-
+-/*
+- * File creation. Allocate an inode, and we're done..
+- */
+-
+-#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
+-#define YCRED(x) x
+-#else
+-#define YCRED(x) (x->cred)
+-#endif
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
+-			dev_t rdev)
+-#else
+-static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
+-			int rdev)
+-#endif
+-{
+-	struct inode *inode;
+-
+-	yaffs_Object *obj = NULL;
+-	yaffs_Device *dev;
+-
+-	yaffs_Object *parent = yaffs_InodeToObject(dir);
+-
+-	int error = -ENOSPC;
+-	uid_t uid = YCRED(current)->fsuid;
+-	gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid;
+-
+-	if ((dir->i_mode & S_ISGID) && S_ISDIR(mode))
+-		mode |= S_ISGID;
+-
+-	if (parent) {
+-		T(YAFFS_TRACE_OS,
+-			("yaffs_mknod: parent object %d type %d\n",
+-			parent->objectId, parent->variantType));
+-	} else {
+-		T(YAFFS_TRACE_OS,
+-			("yaffs_mknod: could not get parent object\n"));
+-		return -EPERM;
+-	}
+-
+-	T(YAFFS_TRACE_OS, ("yaffs_mknod: making oject for %s, "
+-			"mode %x dev %x\n",
+-			dentry->d_name.name, mode, rdev));
+-
+-	dev = parent->myDev;
+-
+-	yaffs_GrossLock(dev);
+-
+-	switch (mode & S_IFMT) {
+-	default:
+-		/* Special (socket, fifo, device...) */
+-		T(YAFFS_TRACE_OS, ("yaffs_mknod: making special\n"));
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-		obj = yaffs_MknodSpecial(parent, dentry->d_name.name, mode, uid,
+-				gid, old_encode_dev(rdev));
+-#else
+-		obj = yaffs_MknodSpecial(parent, dentry->d_name.name, mode, uid,
+-				gid, rdev);
+-#endif
+-		break;
+-	case S_IFREG:		/* file          */
+-		T(YAFFS_TRACE_OS, ("yaffs_mknod: making file\n"));
+-		obj = yaffs_MknodFile(parent, dentry->d_name.name, mode, uid,
+-				gid);
+-		break;
+-	case S_IFDIR:		/* directory */
+-		T(YAFFS_TRACE_OS,
+-			("yaffs_mknod: making directory\n"));
+-		obj = yaffs_MknodDirectory(parent, dentry->d_name.name, mode,
+-					uid, gid);
+-		break;
+-	case S_IFLNK:		/* symlink */
+-		T(YAFFS_TRACE_OS, ("yaffs_mknod: making symlink\n"));
+-		obj = NULL;	/* Do we ever get here? */
+-		break;
+-	}
+-
+-	/* Can not call yaffs_get_inode() with gross lock held */
+-	yaffs_GrossUnlock(dev);
+-
+-	if (obj) {
+-		inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj);
+-		d_instantiate(dentry, inode);
+-		T(YAFFS_TRACE_OS,
+-			("yaffs_mknod created object %d count = %d\n",
+-			obj->objectId, atomic_read(&inode->i_count)));
+-		error = 0;
+-	} else {
+-		T(YAFFS_TRACE_OS,
+-			("yaffs_mknod failed making object\n"));
+-		error = -ENOMEM;
+-	}
+-
+-	return error;
+-}
+-
+-static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
+-{
+-	int retVal;
+-	T(YAFFS_TRACE_OS, ("yaffs_mkdir\n"));
+-	retVal = yaffs_mknod(dir, dentry, mode | S_IFDIR, 0);
+-	return retVal;
+-}
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
+-			struct nameidata *n)
+-#else
+-static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode)
+-#endif
+-{
+-	T(YAFFS_TRACE_OS, ("yaffs_create\n"));
+-	return yaffs_mknod(dir, dentry, mode | S_IFREG, 0);
+-}
+-
+-static int yaffs_unlink(struct inode *dir, struct dentry *dentry)
+-{
+-	int retVal;
+-
+-	yaffs_Device *dev;
+-
+-	T(YAFFS_TRACE_OS,
+-		("yaffs_unlink %d:%s\n", (int)(dir->i_ino),
+-		dentry->d_name.name));
+-
+-	dev = yaffs_InodeToObject(dir)->myDev;
+-
+-	yaffs_GrossLock(dev);
+-
+-	retVal = yaffs_Unlink(yaffs_InodeToObject(dir), dentry->d_name.name);
+-
+-	if (retVal == YAFFS_OK) {
+-		dentry->d_inode->i_nlink--;
+-		dir->i_version++;
+-		yaffs_GrossUnlock(dev);
+-		mark_inode_dirty(dentry->d_inode);
+-		return 0;
+-	}
+-	yaffs_GrossUnlock(dev);
+-	return -ENOTEMPTY;
+-}
+-
+-/*
+- * Create a link...
+- */
+-static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
+-			struct dentry *dentry)
+-{
+-	struct inode *inode = old_dentry->d_inode;
+-	yaffs_Object *obj = NULL;
+-	yaffs_Object *link = NULL;
+-	yaffs_Device *dev;
+-
+-	T(YAFFS_TRACE_OS, ("yaffs_link\n"));
+-
+-	obj = yaffs_InodeToObject(inode);
+-	dev = obj->myDev;
+-
+-	yaffs_GrossLock(dev);
+-
+-	if (!S_ISDIR(inode->i_mode))		/* Don't link directories */
+-		link = yaffs_Link(yaffs_InodeToObject(dir), dentry->d_name.name,
+-			obj);
+-
+-	if (link) {
+-		old_dentry->d_inode->i_nlink = yaffs_GetObjectLinkCount(obj);
+-		d_instantiate(dentry, old_dentry->d_inode);
+-		atomic_inc(&old_dentry->d_inode->i_count);
+-		T(YAFFS_TRACE_OS,
+-			("yaffs_link link count %d i_count %d\n",
+-			old_dentry->d_inode->i_nlink,
+-			atomic_read(&old_dentry->d_inode->i_count)));
+-	}
+-
+-	yaffs_GrossUnlock(dev);
+-
+-	if (link)
+-		return 0;
+-
+-	return -EPERM;
+-}
+-
+-static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
+-				const char *symname)
+-{
+-	yaffs_Object *obj;
+-	yaffs_Device *dev;
+-	uid_t uid = YCRED(current)->fsuid;
+-	gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid;
+-
+-	T(YAFFS_TRACE_OS, ("yaffs_symlink\n"));
+-
+-	dev = yaffs_InodeToObject(dir)->myDev;
+-	yaffs_GrossLock(dev);
+-	obj = yaffs_MknodSymLink(yaffs_InodeToObject(dir), dentry->d_name.name,
+-				S_IFLNK | S_IRWXUGO, uid, gid, symname);
+-	yaffs_GrossUnlock(dev);
+-
+-	if (obj) {
+-		struct inode *inode;
+-
+-		inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
+-		d_instantiate(dentry, inode);
+-		T(YAFFS_TRACE_OS, ("symlink created OK\n"));
+-		return 0;
+-	} else {
+-		T(YAFFS_TRACE_OS, ("symlink not created\n"));
+-	}
+-
+-	return -ENOMEM;
+-}
+-
+-static int yaffs_sync_object(struct file *file, struct dentry *dentry,
+-				int datasync)
+-{
+-
+-	yaffs_Object *obj;
+-	yaffs_Device *dev;
+-
+-	obj = yaffs_DentryToObject(dentry);
+-
+-	dev = obj->myDev;
+-
+-	T(YAFFS_TRACE_OS, ("yaffs_sync_object\n"));
+-	yaffs_GrossLock(dev);
+-	yaffs_FlushFile(obj, 1);
+-	yaffs_GrossUnlock(dev);
+-	return 0;
+-}
+-
+-/*
+- * The VFS layer already does all the dentry stuff for rename.
+- *
+- * NB: POSIX says you can rename an object over an old object of the same name
+- */
+-static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
+-			struct inode *new_dir, struct dentry *new_dentry)
+-{
+-	yaffs_Device *dev;
+-	int retVal = YAFFS_FAIL;
+-	yaffs_Object *target;
+-
+-	T(YAFFS_TRACE_OS, ("yaffs_rename\n"));
+-	dev = yaffs_InodeToObject(old_dir)->myDev;
+-
+-	yaffs_GrossLock(dev);
+-
+-	/* Check if the target is an existing directory that is not empty. */
+-	target = yaffs_FindObjectByName(yaffs_InodeToObject(new_dir),
+-				new_dentry->d_name.name);
+-
+-
+-
+-	if (target && target->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
+-		!ylist_empty(&target->variant.directoryVariant.children)) {
+-
+-		T(YAFFS_TRACE_OS, ("target is non-empty dir\n"));
+-
+-		retVal = YAFFS_FAIL;
+-	} else {
+-		/* Now does unlinking internally using shadowing mechanism */
+-		T(YAFFS_TRACE_OS, ("calling yaffs_RenameObject\n"));
+-
+-		retVal = yaffs_RenameObject(yaffs_InodeToObject(old_dir),
+-				old_dentry->d_name.name,
+-				yaffs_InodeToObject(new_dir),
+-				new_dentry->d_name.name);
+-	}
+-	yaffs_GrossUnlock(dev);
+-
+-	if (retVal == YAFFS_OK) {
+-		if (target) {
+-			new_dentry->d_inode->i_nlink--;
+-			mark_inode_dirty(new_dentry->d_inode);
+-		}
+-
+-		return 0;
+-	} else {
+-		return -ENOTEMPTY;
+-	}
+-}
+-
+-static int yaffs_setattr(struct dentry *dentry, struct iattr *attr)
+-{
+-	struct inode *inode = dentry->d_inode;
+-	int error;
+-	yaffs_Device *dev;
+-
+-	T(YAFFS_TRACE_OS,
+-		("yaffs_setattr of object %d\n",
+-		yaffs_InodeToObject(inode)->objectId));
+-
+-	error = inode_change_ok(inode, attr);
+-	if (error == 0) {
+-		dev = yaffs_InodeToObject(inode)->myDev;
+-		yaffs_GrossLock(dev);
+-		if (yaffs_SetAttributes(yaffs_InodeToObject(inode), attr) ==
+-				YAFFS_OK) {
+-			error = 0;
+-		} else {
+-			error = -EPERM;
+-		}
+-		yaffs_GrossUnlock(dev);
+-		if (!error)
+-			error = inode_setattr(inode, attr);
+-	}
+-	return error;
+-}
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+-static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf)
+-{
+-	yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
+-	struct super_block *sb = dentry->d_sb;
+-#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf)
+-{
+-	yaffs_Device *dev = yaffs_SuperToDevice(sb);
+-#else
+-static int yaffs_statfs(struct super_block *sb, struct statfs *buf)
+-{
+-	yaffs_Device *dev = yaffs_SuperToDevice(sb);
+-#endif
+-
+-	T(YAFFS_TRACE_OS, ("yaffs_statfs\n"));
+-
+-	yaffs_GrossLock(dev);
+-
+-	buf->f_type = YAFFS_MAGIC;
+-	buf->f_bsize = sb->s_blocksize;
+-	buf->f_namelen = 255;
+-
+-	if (dev->nDataBytesPerChunk & (dev->nDataBytesPerChunk - 1)) {
+-		/* Do this if chunk size is not a power of 2 */
+-
+-		uint64_t bytesInDev;
+-		uint64_t bytesFree;
+-
+-		bytesInDev = ((uint64_t)((dev->endBlock - dev->startBlock + 1))) *
+-			((uint64_t)(dev->nChunksPerBlock * dev->nDataBytesPerChunk));
+-
+-		do_div(bytesInDev, sb->s_blocksize); /* bytesInDev becomes the number of blocks */
+-		buf->f_blocks = bytesInDev;
+-
+-		bytesFree  = ((uint64_t)(yaffs_GetNumberOfFreeChunks(dev))) *
+-			((uint64_t)(dev->nDataBytesPerChunk));
+-
+-		do_div(bytesFree, sb->s_blocksize);
+-
+-		buf->f_bfree = bytesFree;
+-
+-	} else if (sb->s_blocksize > dev->nDataBytesPerChunk) {
+-
+-		buf->f_blocks =
+-			(dev->endBlock - dev->startBlock + 1) *
+-			dev->nChunksPerBlock /
+-			(sb->s_blocksize / dev->nDataBytesPerChunk);
+-		buf->f_bfree =
+-			yaffs_GetNumberOfFreeChunks(dev) /
+-			(sb->s_blocksize / dev->nDataBytesPerChunk);
+-	} else {
+-		buf->f_blocks =
+-			(dev->endBlock - dev->startBlock + 1) *
+-			dev->nChunksPerBlock *
+-			(dev->nDataBytesPerChunk / sb->s_blocksize);
+-
+-		buf->f_bfree =
+-			yaffs_GetNumberOfFreeChunks(dev) *
+-			(dev->nDataBytesPerChunk / sb->s_blocksize);
+-	}
+-
+-	buf->f_files = 0;
+-	buf->f_ffree = 0;
+-	buf->f_bavail = buf->f_bfree;
+-
+-	yaffs_GrossUnlock(dev);
+-	return 0;
+-}
+-
+-
+-static int yaffs_do_sync_fs(struct super_block *sb)
+-{
+-
+-	yaffs_Device *dev = yaffs_SuperToDevice(sb);
+-	T(YAFFS_TRACE_OS, ("yaffs_do_sync_fs\n"));
+-
+-	if (sb->s_dirt) {
+-		yaffs_GrossLock(dev);
+-
+-		if (dev) {
+-			yaffs_FlushEntireDeviceCache(dev);
+-			yaffs_CheckpointSave(dev);
+-		}
+-
+-		yaffs_GrossUnlock(dev);
+-
+-		sb->s_dirt = 0;
+-	}
+-	return 0;
+-}
+-
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+-static void yaffs_write_super(struct super_block *sb)
+-#else
+-static int yaffs_write_super(struct super_block *sb)
+-#endif
+-{
+-
+-	T(YAFFS_TRACE_OS, ("yaffs_write_super\n"));
+-	if (yaffs_auto_checkpoint >= 2)
+-		yaffs_do_sync_fs(sb);
+-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 18))
+-	return 0;
+-#endif
+-}
+-
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+-static int yaffs_sync_fs(struct super_block *sb, int wait)
+-#else
+-static int yaffs_sync_fs(struct super_block *sb)
+-#endif
+-{
+-	T(YAFFS_TRACE_OS, ("yaffs_sync_fs\n"));
+-
+-	if (yaffs_auto_checkpoint >= 1)
+-		yaffs_do_sync_fs(sb);
+-
+-	return 0;
+-}
+-
+-#ifdef YAFFS_USE_OWN_IGET
+-
+-static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino)
+-{
+-	struct inode *inode;
+-	yaffs_Object *obj;
+-	yaffs_Device *dev = yaffs_SuperToDevice(sb);
+-
+-	T(YAFFS_TRACE_OS,
+-		("yaffs_iget for %lu\n", ino));
+-
+-	inode = iget_locked(sb, ino);
+-	if (!inode)
+-		return ERR_PTR(-ENOMEM);
+-	if (!(inode->i_state & I_NEW))
+-		return inode;
+-
+-	/* NB This is called as a side effect of other functions, but
+-	 * we had to release the lock to prevent deadlocks, so
+-	 * need to lock again.
+-	 */
+-
+-	yaffs_GrossLock(dev);
+-
+-	obj = yaffs_FindObjectByNumber(dev, inode->i_ino);
+-
+-	yaffs_FillInodeFromObject(inode, obj);
+-
+-	yaffs_GrossUnlock(dev);
+-
+-	unlock_new_inode(inode);
+-	return inode;
+-}
+-
+-#else
+-
+-static void yaffs_read_inode(struct inode *inode)
+-{
+-	/* NB This is called as a side effect of other functions, but
+-	 * we had to release the lock to prevent deadlocks, so
+-	 * need to lock again.
+-	 */
+-
+-	yaffs_Object *obj;
+-	yaffs_Device *dev = yaffs_SuperToDevice(inode->i_sb);
+-
+-	T(YAFFS_TRACE_OS,
+-		("yaffs_read_inode for %d\n", (int)inode->i_ino));
+-
+-	yaffs_GrossLock(dev);
+-
+-	obj = yaffs_FindObjectByNumber(dev, inode->i_ino);
+-
+-	yaffs_FillInodeFromObject(inode, obj);
+-
+-	yaffs_GrossUnlock(dev);
+-}
+-
+-#endif
+-
+-static YLIST_HEAD(yaffs_dev_list);
+-
+-#if 0 /* not used */
+-static int yaffs_remount_fs(struct super_block *sb, int *flags, char *data)
+-{
+-	yaffs_Device    *dev = yaffs_SuperToDevice(sb);
+-
+-	if (*flags & MS_RDONLY) {
+-		struct mtd_info *mtd = yaffs_SuperToDevice(sb)->genericDevice;
+-
+-		T(YAFFS_TRACE_OS,
+-			("yaffs_remount_fs: %s: RO\n", dev->name));
+-
+-		yaffs_GrossLock(dev);
+-
+-		yaffs_FlushEntireDeviceCache(dev);
+-
+-		yaffs_CheckpointSave(dev);
+-
+-		if (mtd->sync)
+-			mtd->sync(mtd);
+-
+-		yaffs_GrossUnlock(dev);
+-	} else {
+-		T(YAFFS_TRACE_OS,
+-			("yaffs_remount_fs: %s: RW\n", dev->name));
+-	}
+-
+-	return 0;
+-}
+-#endif
+-
+-static void yaffs_put_super(struct super_block *sb)
+-{
+-	yaffs_Device *dev = yaffs_SuperToDevice(sb);
+-
+-	T(YAFFS_TRACE_OS, ("yaffs_put_super\n"));
+-
+-	yaffs_GrossLock(dev);
+-
+-	yaffs_FlushEntireDeviceCache(dev);
+-
+-	yaffs_CheckpointSave(dev);
+-
+-	if (dev->putSuperFunc)
+-		dev->putSuperFunc(sb);
+-
+-	yaffs_Deinitialise(dev);
+-
+-	yaffs_GrossUnlock(dev);
+-
+-	/* we assume this is protected by lock_kernel() in mount/umount */
+-	ylist_del(&dev->devList);
+-
+-	if (dev->spareBuffer) {
+-		YFREE(dev->spareBuffer);
+-		dev->spareBuffer = NULL;
+-	}
+-
+-	kfree(dev);
+-}
+-
+-
+-static void yaffs_MTDPutSuper(struct super_block *sb)
+-{
+-	struct mtd_info *mtd = yaffs_SuperToDevice(sb)->genericDevice;
+-
+-	if (mtd->sync)
+-		mtd->sync(mtd);
+-
+-	put_mtd_device(mtd);
+-}
+-
+-
+-static void yaffs_MarkSuperBlockDirty(void *vsb)
+-{
+-	struct super_block *sb = (struct super_block *)vsb;
+-
+-	T(YAFFS_TRACE_OS, ("yaffs_MarkSuperBlockDirty() sb = %p\n", sb));
+-	if (sb)
+-		sb->s_dirt = 1;
+-}
+-
+-typedef struct {
+-	int inband_tags;
+-	int skip_checkpoint_read;
+-	int skip_checkpoint_write;
+-	int no_cache;
+-} yaffs_options;
+-
+-#define MAX_OPT_LEN 20
+-static int yaffs_parse_options(yaffs_options *options, const char *options_str)
+-{
+-	char cur_opt[MAX_OPT_LEN + 1];
+-	int p;
+-	int error = 0;
+-
+-	/* Parse through the options which is a comma seperated list */
+-
+-	while (options_str && *options_str && !error) {
+-		memset(cur_opt, 0, MAX_OPT_LEN + 1);
+-		p = 0;
+-
+-		while (*options_str && *options_str != ',') {
+-			if (p < MAX_OPT_LEN) {
+-				cur_opt[p] = *options_str;
+-				p++;
+-			}
+-			options_str++;
+-		}
+-
+-		if (!strcmp(cur_opt, "inband-tags"))
+-			options->inband_tags = 1;
+-		else if (!strcmp(cur_opt, "no-cache"))
+-			options->no_cache = 1;
+-		else if (!strcmp(cur_opt, "no-checkpoint-read"))
+-			options->skip_checkpoint_read = 1;
+-		else if (!strcmp(cur_opt, "no-checkpoint-write"))
+-			options->skip_checkpoint_write = 1;
+-		else if (!strcmp(cur_opt, "no-checkpoint")) {
+-			options->skip_checkpoint_read = 1;
+-			options->skip_checkpoint_write = 1;
+-		} else {
+-			printk(KERN_INFO "yaffs: Bad mount option \"%s\"\n",
+-					cur_opt);
+-			error = 1;
+-		}
+-	}
+-
+-	return error;
+-}
+-
+-static struct super_block *yaffs_internal_read_super(int yaffsVersion,
+-						struct super_block *sb,
+-						void *data, int silent)
+-{
+-	int nBlocks;
+-	struct inode *inode = NULL;
+-	struct dentry *root;
+-	yaffs_Device *dev = 0;
+-	char devname_buf[BDEVNAME_SIZE + 1];
+-	struct mtd_info *mtd;
+-	int err;
+-	char *data_str = (char *)data;
+-
+-	yaffs_options options;
+-
+-	sb->s_magic = YAFFS_MAGIC;
+-	sb->s_op = &yaffs_super_ops;
+-	sb->s_flags |= MS_NOATIME;
+-
+-	if (!sb)
+-		printk(KERN_INFO "yaffs: sb is NULL\n");
+-	else if (!sb->s_dev)
+-		printk(KERN_INFO "yaffs: sb->s_dev is NULL\n");
+-	else if (!yaffs_devname(sb, devname_buf))
+-		printk(KERN_INFO "yaffs: devname is NULL\n");
+-	else
+-		printk(KERN_INFO "yaffs: dev is %d name is \"%s\"\n",
+-		       sb->s_dev,
+-		       yaffs_devname(sb, devname_buf));
+-
+-	if (!data_str)
+-		data_str = "";
+-
+-	printk(KERN_INFO "yaffs: passed flags \"%s\"\n", data_str);
+-
+-	memset(&options, 0, sizeof(options));
+-
+-	if (yaffs_parse_options(&options, data_str)) {
+-		/* Option parsing failed */
+-		return NULL;
+-	}
+-
+-
+-	sb->s_blocksize = PAGE_CACHE_SIZE;
+-	sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
+-	T(YAFFS_TRACE_OS, ("yaffs_read_super: Using yaffs%d\n", yaffsVersion));
+-	T(YAFFS_TRACE_OS,
+-	  ("yaffs_read_super: block size %d\n", (int)(sb->s_blocksize)));
+-
+-#ifdef CONFIG_YAFFS_DISABLE_WRITE_VERIFY
+-	T(YAFFS_TRACE_OS,
+-	  ("yaffs: Write verification disabled. All guarantees "
+-	   "null and void\n"));
+-#endif
+-
+-	T(YAFFS_TRACE_ALWAYS, ("yaffs: Attempting MTD mount on %u.%u, "
+-			       "\"%s\"\n",
+-			       MAJOR(sb->s_dev), MINOR(sb->s_dev),
+-			       yaffs_devname(sb, devname_buf)));
+-
+-	/* Check it's an mtd device..... */
+-	if (MAJOR(sb->s_dev) != MTD_BLOCK_MAJOR)
+-		return NULL;	/* This isn't an mtd device */
+-
+-	/* Get the device */
+-	mtd = get_mtd_device(NULL, MINOR(sb->s_dev));
+-	if (!mtd) {
+-		T(YAFFS_TRACE_ALWAYS,
+-		  ("yaffs: MTD device #%u doesn't appear to exist\n",
+-		   MINOR(sb->s_dev)));
+-		return NULL;
+-	}
+-	/* Check it's NAND */
+-	if (mtd->type != MTD_NANDFLASH) {
+-		T(YAFFS_TRACE_ALWAYS,
+-		  ("yaffs: MTD device is not NAND it's type %d\n", mtd->type));
+-		return NULL;
+-	}
+-
+-	T(YAFFS_TRACE_OS, (" erase %p\n", mtd->erase));
+-	T(YAFFS_TRACE_OS, (" read %p\n", mtd->read));
+-	T(YAFFS_TRACE_OS, (" write %p\n", mtd->write));
+-	T(YAFFS_TRACE_OS, (" readoob %p\n", mtd->read_oob));
+-	T(YAFFS_TRACE_OS, (" writeoob %p\n", mtd->write_oob));
+-	T(YAFFS_TRACE_OS, (" block_isbad %p\n", mtd->block_isbad));
+-	T(YAFFS_TRACE_OS, (" block_markbad %p\n", mtd->block_markbad));
+-	T(YAFFS_TRACE_OS, (" %s %d\n", WRITE_SIZE_STR, WRITE_SIZE(mtd)));
+-	T(YAFFS_TRACE_OS, (" oobsize %d\n", mtd->oobsize));
+-	T(YAFFS_TRACE_OS, (" erasesize %d\n", mtd->erasesize));
+-#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
+-	T(YAFFS_TRACE_OS, (" size %u\n", mtd->size));
+-#else
+-	T(YAFFS_TRACE_OS, (" size %lld\n", mtd->size));
+-#endif
+-
+-#ifdef CONFIG_YAFFS_AUTO_YAFFS2
+-
+-	if (yaffsVersion == 1 && WRITE_SIZE(mtd) >= 2048) {
+-		T(YAFFS_TRACE_ALWAYS, ("yaffs: auto selecting yaffs2\n"));
+-		yaffsVersion = 2;
+-	}
+-
+-	/* Added NCB 26/5/2006 for completeness */
+-	if (yaffsVersion == 2 && !options.inband_tags && WRITE_SIZE(mtd) == 512) {
+-		T(YAFFS_TRACE_ALWAYS, ("yaffs: auto selecting yaffs1\n"));
+-		yaffsVersion = 1;
+-	}
+-
+-#endif
+-
+-	if (yaffsVersion == 2) {
+-		/* Check for version 2 style functions */
+-		if (!mtd->erase ||
+-		    !mtd->block_isbad ||
+-		    !mtd->block_markbad ||
+-		    !mtd->read ||
+-		    !mtd->write ||
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+-		    !mtd->read_oob || !mtd->write_oob) {
+-#else
+-		    !mtd->write_ecc ||
+-		    !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) {
+-#endif
+-			T(YAFFS_TRACE_ALWAYS,
+-			  ("yaffs: MTD device does not support required "
+-			   "functions\n"));;
+-			return NULL;
+-		}
+-
+-		if ((WRITE_SIZE(mtd) < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
+-		    mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE) &&
+-		    !options.inband_tags) {
+-			T(YAFFS_TRACE_ALWAYS,
+-			  ("yaffs: MTD device does not have the "
+-			   "right page sizes\n"));
+-			return NULL;
+-		}
+-	} else {
+-		/* Check for V1 style functions */
+-		if (!mtd->erase ||
+-		    !mtd->read ||
+-		    !mtd->write ||
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+-		    !mtd->read_oob || !mtd->write_oob) {
+-#else
+-		    !mtd->write_ecc ||
+-		    !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) {
+-#endif
+-			T(YAFFS_TRACE_ALWAYS,
+-			  ("yaffs: MTD device does not support required "
+-			   "functions\n"));;
+-			return NULL;
+-		}
+-
+-		if (WRITE_SIZE(mtd) < YAFFS_BYTES_PER_CHUNK ||
+-		    mtd->oobsize != YAFFS_BYTES_PER_SPARE) {
+-			T(YAFFS_TRACE_ALWAYS,
+-			  ("yaffs: MTD device does not support have the "
+-			   "right page sizes\n"));
+-			return NULL;
+-		}
+-	}
+-
+-	/* OK, so if we got here, we have an MTD that's NAND and looks
+-	 * like it has the right capabilities
+-	 * Set the yaffs_Device up for mtd
+-	 */
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-	sb->s_fs_info = dev = kmalloc(sizeof(yaffs_Device), GFP_KERNEL);
+-#else
+-	sb->u.generic_sbp = dev = kmalloc(sizeof(yaffs_Device), GFP_KERNEL);
+-#endif
+-	if (!dev) {
+-		/* Deep shit could not allocate device structure */
+-		T(YAFFS_TRACE_ALWAYS,
+-		  ("yaffs_read_super: Failed trying to allocate "
+-		   "yaffs_Device. \n"));
+-		return NULL;
+-	}
+-
+-	memset(dev, 0, sizeof(yaffs_Device));
+-	dev->genericDevice = mtd;
+-	dev->name = mtd->name;
+-
+-	/* Set up the memory size parameters.... */
+-
+-	nBlocks = YCALCBLOCKS(mtd->size, (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK));
+-
+-	dev->startBlock = 0;
+-	dev->endBlock = nBlocks - 1;
+-	dev->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK;
+-	dev->totalBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
+-	dev->nReservedBlocks = 5;
+-	dev->nShortOpCaches = (options.no_cache) ? 0 : 10;
+-	dev->inbandTags = options.inband_tags;
+-
+-	/* ... and the functions. */
+-	if (yaffsVersion == 2) {
+-		dev->writeChunkWithTagsToNAND =
+-		    nandmtd2_WriteChunkWithTagsToNAND;
+-		dev->readChunkWithTagsFromNAND =
+-		    nandmtd2_ReadChunkWithTagsFromNAND;
+-		dev->markNANDBlockBad = nandmtd2_MarkNANDBlockBad;
+-		dev->queryNANDBlock = nandmtd2_QueryNANDBlock;
+-		dev->spareBuffer = YMALLOC(mtd->oobsize);
+-		dev->isYaffs2 = 1;
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+-		dev->totalBytesPerChunk = mtd->writesize;
+-		dev->nChunksPerBlock = mtd->erasesize / mtd->writesize;
+-#else
+-		dev->totalBytesPerChunk = mtd->oobblock;
+-		dev->nChunksPerBlock = mtd->erasesize / mtd->oobblock;
+-#endif
+-		nBlocks = YCALCBLOCKS(mtd->size, mtd->erasesize);
+-
+-		dev->startBlock = 0;
+-		dev->endBlock = nBlocks - 1;
+-	} else {
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+-		/* use the MTD interface in yaffs_mtdif1.c */
+-		dev->writeChunkWithTagsToNAND =
+-			nandmtd1_WriteChunkWithTagsToNAND;
+-		dev->readChunkWithTagsFromNAND =
+-			nandmtd1_ReadChunkWithTagsFromNAND;
+-		dev->markNANDBlockBad = nandmtd1_MarkNANDBlockBad;
+-		dev->queryNANDBlock = nandmtd1_QueryNANDBlock;
+-#else
+-		dev->writeChunkToNAND = nandmtd_WriteChunkToNAND;
+-		dev->readChunkFromNAND = nandmtd_ReadChunkFromNAND;
+-#endif
+-		dev->isYaffs2 = 0;
+-	}
+-	/* ... and common functions */
+-	dev->eraseBlockInNAND = nandmtd_EraseBlockInNAND;
+-	dev->initialiseNAND = nandmtd_InitialiseNAND;
+-
+-	dev->putSuperFunc = yaffs_MTDPutSuper;
+-
+-	dev->superBlock = (void *)sb;
+-	dev->markSuperBlockDirty = yaffs_MarkSuperBlockDirty;
+-
+-
+-#ifndef CONFIG_YAFFS_DOES_ECC
+-	dev->useNANDECC = 1;
+-#endif
+-
+-#ifdef CONFIG_YAFFS_DISABLE_WIDE_TNODES
+-	dev->wideTnodesDisabled = 1;
+-#endif
+-
+-	dev->skipCheckpointRead = options.skip_checkpoint_read;
+-	dev->skipCheckpointWrite = options.skip_checkpoint_write;
+-
+-	/* we assume this is protected by lock_kernel() in mount/umount */
+-	ylist_add_tail(&dev->devList, &yaffs_dev_list);
+-
+-	init_MUTEX(&dev->grossLock);
+-
+-	yaffs_GrossLock(dev);
+-
+-	err = yaffs_GutsInitialise(dev);
+-
+-	T(YAFFS_TRACE_OS,
+-	  ("yaffs_read_super: guts initialised %s\n",
+-	   (err == YAFFS_OK) ? "OK" : "FAILED"));
+-
+-	/* Release lock before yaffs_get_inode() */
+-	yaffs_GrossUnlock(dev);
+-
+-	/* Create root inode */
+-	if (err == YAFFS_OK)
+-		inode = yaffs_get_inode(sb, S_IFDIR | 0755, 0,
+-					yaffs_Root(dev));
+-
+-	if (!inode)
+-		return NULL;
+-
+-	inode->i_op = &yaffs_dir_inode_operations;
+-	inode->i_fop = &yaffs_dir_operations;
+-
+-	T(YAFFS_TRACE_OS, ("yaffs_read_super: got root inode\n"));
+-
+-	root = d_alloc_root(inode);
+-
+-	T(YAFFS_TRACE_OS, ("yaffs_read_super: d_alloc_root done\n"));
+-
+-	if (!root) {
+-		iput(inode);
+-		return NULL;
+-	}
+-	sb->s_root = root;
+-	sb->s_dirt = !dev->isCheckpointed;
+-	T(YAFFS_TRACE_ALWAYS,
+-	  ("yaffs_read_super: isCheckpointed %d\n", dev->isCheckpointed));
+-
+-	T(YAFFS_TRACE_OS, ("yaffs_read_super: done\n"));
+-	return sb;
+-}
+-
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-static int yaffs_internal_read_super_mtd(struct super_block *sb, void *data,
+-					 int silent)
+-{
+-	return yaffs_internal_read_super(1, sb, data, silent) ? 0 : -EINVAL;
+-}
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+-static int yaffs_read_super(struct file_system_type *fs,
+-			    int flags, const char *dev_name,
+-			    void *data, struct vfsmount *mnt)
+-{
+-
+-	return get_sb_bdev(fs, flags, dev_name, data,
+-			   yaffs_internal_read_super_mtd, mnt);
+-}
+-#else
+-static struct super_block *yaffs_read_super(struct file_system_type *fs,
+-					    int flags, const char *dev_name,
+-					    void *data)
+-{
+-
+-	return get_sb_bdev(fs, flags, dev_name, data,
+-			   yaffs_internal_read_super_mtd);
+-}
+-#endif
+-
+-static struct file_system_type yaffs_fs_type = {
+-	.owner = THIS_MODULE,
+-	.name = "yaffs",
+-	.get_sb = yaffs_read_super,
+-	.kill_sb = kill_block_super,
+-	.fs_flags = FS_REQUIRES_DEV,
+-};
+-#else
+-static struct super_block *yaffs_read_super(struct super_block *sb, void *data,
+-					    int silent)
+-{
+-	return yaffs_internal_read_super(1, sb, data, silent);
+-}
+-
+-static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super,
+-		      FS_REQUIRES_DEV);
+-#endif
+-
+-
+-#ifdef CONFIG_YAFFS_YAFFS2
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-static int yaffs2_internal_read_super_mtd(struct super_block *sb, void *data,
+-					  int silent)
+-{
+-	return yaffs_internal_read_super(2, sb, data, silent) ? 0 : -EINVAL;
+-}
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+-static int yaffs2_read_super(struct file_system_type *fs,
+-			int flags, const char *dev_name, void *data,
+-			struct vfsmount *mnt)
+-{
+-	return get_sb_bdev(fs, flags, dev_name, data,
+-			yaffs2_internal_read_super_mtd, mnt);
+-}
+-#else
+-static struct super_block *yaffs2_read_super(struct file_system_type *fs,
+-					     int flags, const char *dev_name,
+-					     void *data)
+-{
+-
+-	return get_sb_bdev(fs, flags, dev_name, data,
+-			   yaffs2_internal_read_super_mtd);
+-}
+-#endif
+-
+-static struct file_system_type yaffs2_fs_type = {
+-	.owner = THIS_MODULE,
+-	.name = "yaffs2",
+-	.get_sb = yaffs2_read_super,
+-	.kill_sb = kill_block_super,
+-	.fs_flags = FS_REQUIRES_DEV,
+-};
+-#else
+-static struct super_block *yaffs2_read_super(struct super_block *sb,
+-					     void *data, int silent)
+-{
+-	return yaffs_internal_read_super(2, sb, data, silent);
+-}
+-
+-static DECLARE_FSTYPE(yaffs2_fs_type, "yaffs2", yaffs2_read_super,
+-		      FS_REQUIRES_DEV);
+-#endif
+-
+-#endif				/* CONFIG_YAFFS_YAFFS2 */
+-
+-static struct proc_dir_entry *my_proc_entry;
+-
+-static char *yaffs_dump_dev(char *buf, yaffs_Device * dev)
+-{
+-	buf += sprintf(buf, "startBlock......... %d\n", dev->startBlock);
+-	buf += sprintf(buf, "endBlock........... %d\n", dev->endBlock);
+-	buf += sprintf(buf, "totalBytesPerChunk. %d\n", dev->totalBytesPerChunk);
+-	buf += sprintf(buf, "nDataBytesPerChunk. %d\n", dev->nDataBytesPerChunk);
+-	buf += sprintf(buf, "chunkGroupBits..... %d\n", dev->chunkGroupBits);
+-	buf += sprintf(buf, "chunkGroupSize..... %d\n", dev->chunkGroupSize);
+-	buf += sprintf(buf, "nErasedBlocks...... %d\n", dev->nErasedBlocks);
+-	buf += sprintf(buf, "nReservedBlocks.... %d\n", dev->nReservedBlocks);
+-	buf += sprintf(buf, "blocksInCheckpoint. %d\n", dev->blocksInCheckpoint);
+-	buf += sprintf(buf, "nTnodesCreated..... %d\n", dev->nTnodesCreated);
+-	buf += sprintf(buf, "nFreeTnodes........ %d\n", dev->nFreeTnodes);
+-	buf += sprintf(buf, "nObjectsCreated.... %d\n", dev->nObjectsCreated);
+-	buf += sprintf(buf, "nFreeObjects....... %d\n", dev->nFreeObjects);
+-	buf += sprintf(buf, "nFreeChunks........ %d\n", dev->nFreeChunks);
+-	buf += sprintf(buf, "nPageWrites........ %d\n", dev->nPageWrites);
+-	buf += sprintf(buf, "nPageReads......... %d\n", dev->nPageReads);
+-	buf += sprintf(buf, "nBlockErasures..... %d\n", dev->nBlockErasures);
+-	buf += sprintf(buf, "nGCCopies.......... %d\n", dev->nGCCopies);
+-	buf += sprintf(buf, "garbageCollections. %d\n", dev->garbageCollections);
+-	buf += sprintf(buf, "passiveGCs......... %d\n",
+-		    dev->passiveGarbageCollections);
+-	buf += sprintf(buf, "nRetriedWrites..... %d\n", dev->nRetriedWrites);
+-	buf += sprintf(buf, "nShortOpCaches..... %d\n", dev->nShortOpCaches);
+-	buf += sprintf(buf, "nRetireBlocks...... %d\n", dev->nRetiredBlocks);
+-	buf += sprintf(buf, "eccFixed........... %d\n", dev->eccFixed);
+-	buf += sprintf(buf, "eccUnfixed......... %d\n", dev->eccUnfixed);
+-	buf += sprintf(buf, "tagsEccFixed....... %d\n", dev->tagsEccFixed);
+-	buf += sprintf(buf, "tagsEccUnfixed..... %d\n", dev->tagsEccUnfixed);
+-	buf += sprintf(buf, "cacheHits.......... %d\n", dev->cacheHits);
+-	buf += sprintf(buf, "nDeletedFiles...... %d\n", dev->nDeletedFiles);
+-	buf += sprintf(buf, "nUnlinkedFiles..... %d\n", dev->nUnlinkedFiles);
+-	buf +=
+-	    sprintf(buf, "nBackgroudDeletions %d\n", dev->nBackgroundDeletions);
+-	buf += sprintf(buf, "useNANDECC......... %d\n", dev->useNANDECC);
+-	buf += sprintf(buf, "isYaffs2........... %d\n", dev->isYaffs2);
+-	buf += sprintf(buf, "inbandTags......... %d\n", dev->inbandTags);
+-
+-	return buf;
+-}
+-
+-static int yaffs_proc_read(char *page,
+-			   char **start,
+-			   off_t offset, int count, int *eof, void *data)
+-{
+-	struct ylist_head *item;
+-	char *buf = page;
+-	int step = offset;
+-	int n = 0;
+-
+-	/* Get proc_file_read() to step 'offset' by one on each sucessive call.
+-	 * We use 'offset' (*ppos) to indicate where we are in devList.
+-	 * This also assumes the user has posted a read buffer large
+-	 * enough to hold the complete output; but that's life in /proc.
+-	 */
+-
+-	*(int *)start = 1;
+-
+-	/* Print header first */
+-	if (step == 0) {
+-		buf += sprintf(buf, "YAFFS built:" __DATE__ " " __TIME__
+-			       "\n%s\n%s\n", yaffs_fs_c_version,
+-			       yaffs_guts_c_version);
+-	}
+-
+-	/* hold lock_kernel while traversing yaffs_dev_list */
+-	lock_kernel();
+-
+-	/* Locate and print the Nth entry.  Order N-squared but N is small. */
+-	ylist_for_each(item, &yaffs_dev_list) {
+-		yaffs_Device *dev = ylist_entry(item, yaffs_Device, devList);
+-		if (n < step) {
+-			n++;
+-			continue;
+-		}
+-		buf += sprintf(buf, "\nDevice %d \"%s\"\n", n, dev->name);
+-		buf = yaffs_dump_dev(buf, dev);
+-		break;
+-	}
+-	unlock_kernel();
+-
+-	return buf - page < count ? buf - page : count;
+-}
+-
+-/**
+- * Set the verbosity of the warnings and error messages.
+- *
+- * Note that the names can only be a..z or _ with the current code.
+- */
+-
+-static struct {
+-	char *mask_name;
+-	unsigned mask_bitfield;
+-} mask_flags[] = {
+-	{"allocate", YAFFS_TRACE_ALLOCATE},
+-	{"always", YAFFS_TRACE_ALWAYS},
+-	{"bad_blocks", YAFFS_TRACE_BAD_BLOCKS},
+-	{"buffers", YAFFS_TRACE_BUFFERS},
+-	{"bug", YAFFS_TRACE_BUG},
+-	{"checkpt", YAFFS_TRACE_CHECKPOINT},
+-	{"deletion", YAFFS_TRACE_DELETION},
+-	{"erase", YAFFS_TRACE_ERASE},
+-	{"error", YAFFS_TRACE_ERROR},
+-	{"gc_detail", YAFFS_TRACE_GC_DETAIL},
+-	{"gc", YAFFS_TRACE_GC},
+-	{"mtd", YAFFS_TRACE_MTD},
+-	{"nandaccess", YAFFS_TRACE_NANDACCESS},
+-	{"os", YAFFS_TRACE_OS},
+-	{"scan_debug", YAFFS_TRACE_SCAN_DEBUG},
+-	{"scan", YAFFS_TRACE_SCAN},
+-	{"tracing", YAFFS_TRACE_TRACING},
+-
+-	{"verify", YAFFS_TRACE_VERIFY},
+-	{"verify_nand", YAFFS_TRACE_VERIFY_NAND},
+-	{"verify_full", YAFFS_TRACE_VERIFY_FULL},
+-	{"verify_all", YAFFS_TRACE_VERIFY_ALL},
+-
+-	{"write", YAFFS_TRACE_WRITE},
+-	{"all", 0xffffffff},
+-	{"none", 0},
+-	{NULL, 0},
+-};
+-
+-#define MAX_MASK_NAME_LENGTH 40
+-static int yaffs_proc_write(struct file *file, const char *buf,
+-					 unsigned long count, void *data)
+-{
+-	unsigned rg = 0, mask_bitfield;
+-	char *end;
+-	char *mask_name;
+-	const char *x;
+-	char substring[MAX_MASK_NAME_LENGTH + 1];
+-	int i;
+-	int done = 0;
+-	int add, len = 0;
+-	int pos = 0;
+-
+-	rg = yaffs_traceMask;
+-
+-	while (!done && (pos < count)) {
+-		done = 1;
+-		while ((pos < count) && isspace(buf[pos]))
+-			pos++;
+-
+-		switch (buf[pos]) {
+-		case '+':
+-		case '-':
+-		case '=':
+-			add = buf[pos];
+-			pos++;
+-			break;
+-
+-		default:
+-			add = ' ';
+-			break;
+-		}
+-		mask_name = NULL;
+-
+-		mask_bitfield = simple_strtoul(buf + pos, &end, 0);
+-
+-		if (end > buf + pos) {
+-			mask_name = "numeral";
+-			len = end - (buf + pos);
+-			pos += len;
+-			done = 0;
+-		} else {
+-			for (x = buf + pos, i = 0;
+-			    (*x == '_' || (*x >= 'a' && *x <= 'z')) &&
+-			    i < MAX_MASK_NAME_LENGTH; x++, i++, pos++)
+-				substring[i] = *x;
+-			substring[i] = '\0';
+-
+-			for (i = 0; mask_flags[i].mask_name != NULL; i++) {
+-				if (strcmp(substring, mask_flags[i].mask_name) == 0) {
+-					mask_name = mask_flags[i].mask_name;
+-					mask_bitfield = mask_flags[i].mask_bitfield;
+-					done = 0;
+-					break;
+-				}
+-			}
+-		}
+-
+-		if (mask_name != NULL) {
+-			done = 0;
+-			switch (add) {
+-			case '-':
+-				rg &= ~mask_bitfield;
+-				break;
+-			case '+':
+-				rg |= mask_bitfield;
+-				break;
+-			case '=':
+-				rg = mask_bitfield;
+-				break;
+-			default:
+-				rg |= mask_bitfield;
+-				break;
+-			}
+-		}
+-	}
+-
+-	yaffs_traceMask = rg | YAFFS_TRACE_ALWAYS;
+-
+-	printk(KERN_DEBUG "new trace = 0x%08X\n", yaffs_traceMask);
+-
+-	if (rg & YAFFS_TRACE_ALWAYS) {
+-		for (i = 0; mask_flags[i].mask_name != NULL; i++) {
+-			char flag;
+-			flag = ((rg & mask_flags[i].mask_bitfield) == mask_flags[i].mask_bitfield) ? '+' : '-';
+-			printk(KERN_DEBUG "%c%s\n", flag, mask_flags[i].mask_name);
+-		}
+-	}
+-
+-	return count;
+-}
+-
+-/* Stuff to handle installation of file systems */
+-struct file_system_to_install {
+-	struct file_system_type *fst;
+-	int installed;
+-};
+-
+-static struct file_system_to_install fs_to_install[] = {
+-	{&yaffs_fs_type, 0},
+-	{&yaffs2_fs_type, 0},
+-	{NULL, 0}
+-};
+-
+-static int __init init_yaffs_fs(void)
+-{
+-	int error = 0;
+-	struct file_system_to_install *fsinst;
+-
+-	T(YAFFS_TRACE_ALWAYS,
+-	  ("yaffs " __DATE__ " " __TIME__ " Installing. \n"));
+-
+-	/* Install the proc_fs entry */
+-	my_proc_entry = create_proc_entry("yaffs",
+-					       S_IRUGO | S_IFREG,
+-					       YPROC_ROOT);
+-
+-	if (my_proc_entry) {
+-		my_proc_entry->write_proc = yaffs_proc_write;
+-		my_proc_entry->read_proc = yaffs_proc_read;
+-		my_proc_entry->data = NULL;
+-	} else
+-		return -ENOMEM;
+-
+-	/* Now add the file system entries */
+-
+-	fsinst = fs_to_install;
+-
+-	while (fsinst->fst && !error) {
+-		error = register_filesystem(fsinst->fst);
+-		if (!error)
+-			fsinst->installed = 1;
+-		fsinst++;
+-	}
+-
+-	/* Any errors? uninstall  */
+-	if (error) {
+-		fsinst = fs_to_install;
+-
+-		while (fsinst->fst) {
+-			if (fsinst->installed) {
+-				unregister_filesystem(fsinst->fst);
+-				fsinst->installed = 0;
+-			}
+-			fsinst++;
+-		}
+-	}
+-
+-	return error;
+-}
+-
+-static void __exit exit_yaffs_fs(void)
+-{
+-
+-	struct file_system_to_install *fsinst;
+-
+-	T(YAFFS_TRACE_ALWAYS, ("yaffs " __DATE__ " " __TIME__
+-			       " removing. \n"));
+-
+-	remove_proc_entry("yaffs", YPROC_ROOT);
+-
+-	fsinst = fs_to_install;
+-
+-	while (fsinst->fst) {
+-		if (fsinst->installed) {
+-			unregister_filesystem(fsinst->fst);
+-			fsinst->installed = 0;
+-		}
+-		fsinst++;
+-	}
+-}
+-
+-module_init(init_yaffs_fs)
+-module_exit(exit_yaffs_fs)
+-
+-MODULE_DESCRIPTION("YAFFS2 - a NAND specific flash file system");
+-MODULE_AUTHOR("Charles Manning, Aleph One Ltd., 2002-2006");
+-MODULE_LICENSE("GPL");
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffs_getblockinfo.h linux-2.6.36-rc8.new/fs/yaffs2/yaffs_getblockinfo.h
+--- linux-2.6.36-rc8/fs/yaffs2/yaffs_getblockinfo.h	2010-10-20 13:17:58.945000294 +0300
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffs_getblockinfo.h	2010-10-20 13:28:16.058000294 +0300
+@@ -1,7 +1,7 @@
+ /*
+  * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+  *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+  *   for Toby Churchill Ltd and Brightstar Engineering
+  *
+  * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -17,18 +17,19 @@
+ #define __YAFFS_GETBLOCKINFO_H__
+ 
+ #include "yaffs_guts.h"
++#include "yaffs_trace.h"
+ 
+ /* Function to manipulate block info */
+-static Y_INLINE yaffs_BlockInfo *yaffs_GetBlockInfo(yaffs_Device * dev, int blk)
++static Y_INLINE yaffs_block_info_t *yaffs_get_block_info(yaffs_dev_t * dev, int blk)
+ {
+-	if (blk < dev->internalStartBlock || blk > dev->internalEndBlock) {
++	if (blk < dev->internal_start_block || blk > dev->internal_end_block) {
+ 		T(YAFFS_TRACE_ERROR,
+ 		  (TSTR
+ 		   ("**>> yaffs: getBlockInfo block %d is not valid" TENDSTR),
+ 		   blk));
+ 		YBUG();
+ 	}
+-	return &dev->blockInfo[blk - dev->internalStartBlock];
++	return &dev->block_info[blk - dev->internal_start_block];
+ }
+ 
+ #endif
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffs_guts.c linux-2.6.36-rc8.new/fs/yaffs2/yaffs_guts.c
+--- linux-2.6.36-rc8/fs/yaffs2/yaffs_guts.c	2010-10-20 13:17:58.951000294 +0300
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffs_guts.c	2010-10-20 13:28:16.027000294 +0300
+@@ -1,7 +1,7 @@
+ /*
+  * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+  *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+  *   for Toby Churchill Ltd and Brightstar Engineering
+  *
+  * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -10,11 +10,8 @@
+  * it under the terms of the GNU General Public License version 2 as
+  * published by the Free Software Foundation.
+  */
+-
+-const char *yaffs_guts_c_version =
+-    "$Id: yaffs_guts.c,v 1.82 2009-03-09 04:24:17 charles Exp $";
+-
+ #include "yportenv.h"
++#include "yaffs_trace.h"
+ 
+ #include "yaffsinterface.h"
+ #include "yaffs_guts.h"
+@@ -22,118 +19,109 @@ const char *yaffs_guts_c_version =
+ #include "yaffs_getblockinfo.h"
+ 
+ #include "yaffs_tagscompat.h"
+-#ifndef CONFIG_YAFFS_USE_OWN_SORT
+-#include "yaffs_qsort.h"
+-#endif
++
+ #include "yaffs_nand.h"
+ 
+-#include "yaffs_checkptrw.h"
++#include "yaffs_yaffs1.h"
++#include "yaffs_yaffs2.h"
++#include "yaffs_bitmap.h"
++#include "yaffs_verify.h"
+ 
+ #include "yaffs_nand.h"
+ #include "yaffs_packedtags2.h"
+ 
++#include "yaffs_nameval.h"
++#include "yaffs_allocator.h"
+ 
+-#define YAFFS_PASSIVE_GC_CHUNKS 2
++/* Note YAFFS_GC_GOOD_ENOUGH must be <= YAFFS_GC_PASSIVE_THRESHOLD */
++#define YAFFS_GC_GOOD_ENOUGH 2
++#define YAFFS_GC_PASSIVE_THRESHOLD 4
+ 
+ #include "yaffs_ecc.h"
+ 
+ 
++
+ /* Robustification (if it ever comes about...) */
+-static void yaffs_RetireBlock(yaffs_Device *dev, int blockInNAND);
+-static void yaffs_HandleWriteChunkError(yaffs_Device *dev, int chunkInNAND,
++static void yaffs_retire_block(yaffs_dev_t *dev, int flash_block);
++static void yaffs_handle_chunk_wr_error(yaffs_dev_t *dev, int nand_chunk,
+ 		int erasedOk);
+-static void yaffs_HandleWriteChunkOk(yaffs_Device *dev, int chunkInNAND,
++static void yaffs_handle_chunk_wr_ok(yaffs_dev_t *dev, int nand_chunk,
+ 				const __u8 *data,
+-				const yaffs_ExtendedTags *tags);
+-static void yaffs_HandleUpdateChunk(yaffs_Device *dev, int chunkInNAND,
+-				const yaffs_ExtendedTags *tags);
++				const yaffs_ext_tags *tags);
++static void yaffs_handle_chunk_update(yaffs_dev_t *dev, int nand_chunk,
++				const yaffs_ext_tags *tags);
+ 
+ /* Other local prototypes */
+-static int yaffs_UnlinkObject(yaffs_Object *obj);
+-static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj);
+-
+-static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList);
++static void yaffs_update_parent(yaffs_obj_t *obj);
++static int yaffs_unlink_obj(yaffs_obj_t *obj);
++static int yaffs_obj_cache_dirty(yaffs_obj_t *obj);
+ 
+-static int yaffs_WriteNewChunkWithTagsToNAND(yaffs_Device *dev,
++static int yaffs_write_new_chunk(yaffs_dev_t *dev,
+ 					const __u8 *buffer,
+-					yaffs_ExtendedTags *tags,
++					yaffs_ext_tags *tags,
+ 					int useReserve);
+-static int yaffs_PutChunkIntoFile(yaffs_Object *in, int chunkInInode,
+-				int chunkInNAND, int inScan);
+ 
+-static yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev, int number,
+-					yaffs_ObjectType type);
+-static void yaffs_AddObjectToDirectory(yaffs_Object *directory,
+-				yaffs_Object *obj);
+-static int yaffs_UpdateObjectHeader(yaffs_Object *in, const YCHAR *name,
+-				int force, int isShrink, int shadows);
+-static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj);
+-static int yaffs_CheckStructures(void);
+-static int yaffs_DeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level,
+-			int chunkOffset, int *limit);
+-static int yaffs_DoGenericObjectDeletion(yaffs_Object *in);
+-
+-static yaffs_BlockInfo *yaffs_GetBlockInfo(yaffs_Device *dev, int blockNo);
+ 
++static yaffs_obj_t *yaffs_new_obj(yaffs_dev_t *dev, int number,
++					yaffs_obj_type type);
+ 
+-static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,
+-				int chunkInNAND);
+ 
+-static int yaffs_UnlinkWorker(yaffs_Object *obj);
++static int yaffs_apply_xattrib_mod(yaffs_obj_t *obj, char *buffer, yaffs_xattr_mod *xmod);
+ 
+-static int yaffs_TagsMatch(const yaffs_ExtendedTags *tags, int objectId,
+-			int chunkInObject);
++static void yaffs_remove_obj_from_dir(yaffs_obj_t *obj);
++static int yaffs_check_structures(void);
++static int yaffs_generic_obj_del(yaffs_obj_t *in);
++
++static int yaffs_check_chunk_erased(struct yaffs_dev_s *dev,
++				int nand_chunk);
+ 
+-static int yaffs_AllocateChunk(yaffs_Device *dev, int useReserve,
+-				yaffs_BlockInfo **blockUsedPtr);
++static int yaffs_unlink_worker(yaffs_obj_t *obj);
+ 
+-static void yaffs_VerifyFreeChunks(yaffs_Device *dev);
++static int yaffs_tags_match(const yaffs_ext_tags *tags, int obj_id,
++			int chunkInObject);
+ 
+-static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in);
++static int yaffs_alloc_chunk(yaffs_dev_t *dev, int useReserve,
++				yaffs_block_info_t **blockUsedPtr);
+ 
+-static void yaffs_VerifyDirectory(yaffs_Object *directory);
+-#ifdef YAFFS_PARANOID
+-static int yaffs_CheckFileSanity(yaffs_Object *in);
+-#else
+-#define yaffs_CheckFileSanity(in)
+-#endif
++static void yaffs_check_obj_details_loaded(yaffs_obj_t *in);
++
++static void yaffs_invalidate_whole_cache(yaffs_obj_t *in);
++static void yaffs_invalidate_chunk_cache(yaffs_obj_t *object, int chunk_id);
+ 
+-static void yaffs_InvalidateWholeChunkCache(yaffs_Object *in);
+-static void yaffs_InvalidateChunkCache(yaffs_Object *object, int chunkId);
++static int yaffs_find_chunk_in_file(yaffs_obj_t *in, int inode_chunk,
++				yaffs_ext_tags *tags);
+ 
+-static void yaffs_InvalidateCheckpoint(yaffs_Device *dev);
++static int yaffs_verify_chunk_written(yaffs_dev_t *dev,
++					int nand_chunk,
++					const __u8 *data,
++					yaffs_ext_tags *tags);
+ 
+-static int yaffs_FindChunkInFile(yaffs_Object *in, int chunkInInode,
+-				yaffs_ExtendedTags *tags);
+ 
+-static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn,
+-		unsigned pos);
+-static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device *dev,
+-					yaffs_FileStructure *fStruct,
+-					__u32 chunkId);
++static void yaffs_load_name_from_oh(yaffs_dev_t *dev,YCHAR *name, const YCHAR *ohName, int bufferSize);
++static void yaffs_load_oh_from_name(yaffs_dev_t *dev,YCHAR *ohName, const YCHAR *name);
+ 
+ 
+ /* Function to calculate chunk and offset */
+ 
+-static void yaffs_AddrToChunk(yaffs_Device *dev, loff_t addr, int *chunkOut,
++static void yaffs_addr_to_chunk(yaffs_dev_t *dev, loff_t addr, int *chunkOut,
+ 		__u32 *offsetOut)
+ {
+ 	int chunk;
+ 	__u32 offset;
+ 
+-	chunk  = (__u32)(addr >> dev->chunkShift);
++	chunk  = (__u32)(addr >> dev->chunk_shift);
+ 
+-	if (dev->chunkDiv == 1) {
++	if (dev->chunk_div == 1) {
+ 		/* easy power of 2 case */
+-		offset = (__u32)(addr & dev->chunkMask);
++		offset = (__u32)(addr & dev->chunk_mask);
+ 	} else {
+ 		/* Non power-of-2 case */
+ 
+ 		loff_t chunkBase;
+ 
+-		chunk /= dev->chunkDiv;
++		chunk /= dev->chunk_div;
+ 
+-		chunkBase = ((loff_t)chunk) * dev->nDataBytesPerChunk;
++		chunkBase = ((loff_t)chunk) * dev->data_bytes_per_chunk;
+ 		offset = (__u32)(addr - chunkBase);
+ 	}
+ 
+@@ -172,7 +160,7 @@ static __u32 ShiftsGE(__u32 x)
+ 
+ static __u32 Shifts(__u32 x)
+ {
+-	int nShifts;
++	__u32 nShifts;
+ 
+ 	nShifts =  0;
+ 
+@@ -193,49 +181,49 @@ static __u32 Shifts(__u32 x)
+  * Temporary buffer manipulations.
+  */
+ 
+-static int yaffs_InitialiseTempBuffers(yaffs_Device *dev)
++static int yaffs_init_tmp_buffers(yaffs_dev_t *dev)
+ {
+ 	int i;
+ 	__u8 *buf = (__u8 *)1;
+ 
+-	memset(dev->tempBuffer, 0, sizeof(dev->tempBuffer));
++	memset(dev->temp_buffer, 0, sizeof(dev->temp_buffer));
+ 
+ 	for (i = 0; buf && i < YAFFS_N_TEMP_BUFFERS; i++) {
+-		dev->tempBuffer[i].line = 0;	/* not in use */
+-		dev->tempBuffer[i].buffer = buf =
+-		    YMALLOC_DMA(dev->totalBytesPerChunk);
++		dev->temp_buffer[i].line = 0;	/* not in use */
++		dev->temp_buffer[i].buffer = buf =
++		    YMALLOC_DMA(dev->param.total_bytes_per_chunk);
+ 	}
+ 
+ 	return buf ? YAFFS_OK : YAFFS_FAIL;
+ }
+ 
+-__u8 *yaffs_GetTempBuffer(yaffs_Device *dev, int lineNo)
++__u8 *yaffs_get_temp_buffer(yaffs_dev_t *dev, int line_no)
+ {
+ 	int i, j;
+ 
+-	dev->tempInUse++;
+-	if (dev->tempInUse > dev->maxTemp)
+-		dev->maxTemp = dev->tempInUse;
++	dev->temp_in_use++;
++	if (dev->temp_in_use > dev->max_temp)
++		dev->max_temp = dev->temp_in_use;
+ 
+ 	for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
+-		if (dev->tempBuffer[i].line == 0) {
+-			dev->tempBuffer[i].line = lineNo;
+-			if ((i + 1) > dev->maxTemp) {
+-				dev->maxTemp = i + 1;
++		if (dev->temp_buffer[i].line == 0) {
++			dev->temp_buffer[i].line = line_no;
++			if ((i + 1) > dev->max_temp) {
++				dev->max_temp = i + 1;
+ 				for (j = 0; j <= i; j++)
+-					dev->tempBuffer[j].maxLine =
+-					    dev->tempBuffer[j].line;
++					dev->temp_buffer[j].max_line =
++					    dev->temp_buffer[j].line;
+ 			}
+ 
+-			return dev->tempBuffer[i].buffer;
++			return dev->temp_buffer[i].buffer;
+ 		}
+ 	}
+ 
+ 	T(YAFFS_TRACE_BUFFERS,
+ 	  (TSTR("Out of temp buffers at line %d, other held by lines:"),
+-	   lineNo));
++	   line_no));
+ 	for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++)
+-		T(YAFFS_TRACE_BUFFERS, (TSTR(" %d "), dev->tempBuffer[i].line));
++		T(YAFFS_TRACE_BUFFERS, (TSTR(" %d "), dev->temp_buffer[i].line));
+ 
+ 	T(YAFFS_TRACE_BUFFERS, (TSTR(" " TENDSTR)));
+ 
+@@ -244,21 +232,21 @@ __u8 *yaffs_GetTempBuffer(yaffs_Device *
+ 	 * This is not good.
+ 	 */
+ 
+-	dev->unmanagedTempAllocations++;
+-	return YMALLOC(dev->nDataBytesPerChunk);
++	dev->unmanaged_buffer_allocs++;
++	return YMALLOC(dev->data_bytes_per_chunk);
+ 
+ }
+ 
+-void yaffs_ReleaseTempBuffer(yaffs_Device *dev, __u8 *buffer,
+-				    int lineNo)
++void yaffs_release_temp_buffer(yaffs_dev_t *dev, __u8 *buffer,
++				    int line_no)
+ {
+ 	int i;
+ 
+-	dev->tempInUse--;
++	dev->temp_in_use--;
+ 
+ 	for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
+-		if (dev->tempBuffer[i].buffer == buffer) {
+-			dev->tempBuffer[i].line = 0;
++		if (dev->temp_buffer[i].buffer == buffer) {
++			dev->temp_buffer[i].line = 0;
+ 			return;
+ 		}
+ 	}
+@@ -267,9 +255,9 @@ void yaffs_ReleaseTempBuffer(yaffs_Devic
+ 		/* assume it is an unmanaged one. */
+ 		T(YAFFS_TRACE_BUFFERS,
+ 		  (TSTR("Releasing unmanaged temp buffer in line %d" TENDSTR),
+-		   lineNo));
++		   line_no));
+ 		YFREE(buffer);
+-		dev->unmanagedTempDeallocations++;
++		dev->unmanaged_buffer_deallocs++;
+ 	}
+ 
+ }
+@@ -277,21 +265,21 @@ void yaffs_ReleaseTempBuffer(yaffs_Devic
+ /*
+  * Determine if we have a managed buffer.
+  */
+-int yaffs_IsManagedTempBuffer(yaffs_Device *dev, const __u8 *buffer)
++int yaffs_is_managed_tmp_buffer(yaffs_dev_t *dev, const __u8 *buffer)
+ {
+ 	int i;
+ 
+ 	for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
+-		if (dev->tempBuffer[i].buffer == buffer)
++		if (dev->temp_buffer[i].buffer == buffer)
+ 			return 1;
+ 	}
+ 
+-	for (i = 0; i < dev->nShortOpCaches; i++) {
+-		if (dev->srCache[i].data == buffer)
++	for (i = 0; i < dev->param.n_caches; i++) {
++		if (dev->cache[i].data == buffer)
+ 			return 1;
+ 	}
+ 
+-	if (buffer == dev->checkpointBuffer)
++	if (buffer == dev->checkpt_buffer)
+ 		return 1;
+ 
+ 	T(YAFFS_TRACE_ALWAYS,
+@@ -299,6397 +287,4205 @@ int yaffs_IsManagedTempBuffer(yaffs_Devi
+ 	return 0;
+ }
+ 
+-
+-
+ /*
+- * Chunk bitmap manipulations
++ * Verification code
+  */
+ 
+-static Y_INLINE __u8 *yaffs_BlockBits(yaffs_Device *dev, int blk)
+-{
+-	if (blk < dev->internalStartBlock || blk > dev->internalEndBlock) {
+-		T(YAFFS_TRACE_ERROR,
+-			(TSTR("**>> yaffs: BlockBits block %d is not valid" TENDSTR),
+-			blk));
+-		YBUG();
+-	}
+-	return dev->chunkBits +
+-		(dev->chunkBitmapStride * (blk - dev->internalStartBlock));
+-}
+ 
+-static Y_INLINE void yaffs_VerifyChunkBitId(yaffs_Device *dev, int blk, int chunk)
+-{
+-	if (blk < dev->internalStartBlock || blk > dev->internalEndBlock ||
+-			chunk < 0 || chunk >= dev->nChunksPerBlock) {
+-		T(YAFFS_TRACE_ERROR,
+-		(TSTR("**>> yaffs: Chunk Id (%d:%d) invalid"TENDSTR),
+-			blk, chunk));
+-		YBUG();
+-	}
+-}
+ 
+-static Y_INLINE void yaffs_ClearChunkBits(yaffs_Device *dev, int blk)
+-{
+-	__u8 *blkBits = yaffs_BlockBits(dev, blk);
+ 
+-	memset(blkBits, 0, dev->chunkBitmapStride);
+-}
++/*
++ *  Simple hash function. Needs to have a reasonable spread
++ */
+ 
+-static Y_INLINE void yaffs_ClearChunkBit(yaffs_Device *dev, int blk, int chunk)
++static Y_INLINE int yaffs_hash_fn(int n)
+ {
+-	__u8 *blkBits = yaffs_BlockBits(dev, blk);
+-
+-	yaffs_VerifyChunkBitId(dev, blk, chunk);
+-
+-	blkBits[chunk / 8] &= ~(1 << (chunk & 7));
++	n = abs(n);
++	return n % YAFFS_NOBJECT_BUCKETS;
+ }
+ 
+-static Y_INLINE void yaffs_SetChunkBit(yaffs_Device *dev, int blk, int chunk)
+-{
+-	__u8 *blkBits = yaffs_BlockBits(dev, blk);
+-
+-	yaffs_VerifyChunkBitId(dev, blk, chunk);
+-
+-	blkBits[chunk / 8] |= (1 << (chunk & 7));
+-}
++/*
++ * Access functions to useful fake objects.
++ * Note that root might have a presence in NAND if permissions are set.
++ */
+ 
+-static Y_INLINE int yaffs_CheckChunkBit(yaffs_Device *dev, int blk, int chunk)
++yaffs_obj_t *yaffs_root(yaffs_dev_t *dev)
+ {
+-	__u8 *blkBits = yaffs_BlockBits(dev, blk);
+-	yaffs_VerifyChunkBitId(dev, blk, chunk);
+-
+-	return (blkBits[chunk / 8] & (1 << (chunk & 7))) ? 1 : 0;
++	return dev->root_dir;
+ }
+ 
+-static Y_INLINE int yaffs_StillSomeChunkBits(yaffs_Device *dev, int blk)
++yaffs_obj_t *yaffs_lost_n_found(yaffs_dev_t *dev)
+ {
+-	__u8 *blkBits = yaffs_BlockBits(dev, blk);
+-	int i;
+-	for (i = 0; i < dev->chunkBitmapStride; i++) {
+-		if (*blkBits)
+-			return 1;
+-		blkBits++;
+-	}
+-	return 0;
++	return dev->lost_n_found;
+ }
+ 
+-static int yaffs_CountChunkBits(yaffs_Device *dev, int blk)
+-{
+-	__u8 *blkBits = yaffs_BlockBits(dev, blk);
+-	int i;
+-	int n = 0;
+-	for (i = 0; i < dev->chunkBitmapStride; i++) {
+-		__u8 x = *blkBits;
+-		while (x) {
+-			if (x & 1)
+-				n++;
+-			x >>= 1;
+-		}
+-
+-		blkBits++;
+-	}
+-	return n;
+-}
+ 
+ /*
+- * Verification code
++ *  Erased NAND checking functions
+  */
+ 
+-static int yaffs_SkipVerification(yaffs_Device *dev)
+-{
+-	return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY | YAFFS_TRACE_VERIFY_FULL));
+-}
+-
+-static int yaffs_SkipFullVerification(yaffs_Device *dev)
+-{
+-	return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_FULL));
+-}
+-
+-static int yaffs_SkipNANDVerification(yaffs_Device *dev)
++int yaffs_check_ff(__u8 *buffer, int n_bytes)
+ {
+-	return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_NAND));
++	/* Horrible, slow implementation */
++	while (n_bytes--) {
++		if (*buffer != 0xFF)
++			return 0;
++		buffer++;
++	}
++	return 1;
+ }
+ 
+-static const char *blockStateName[] = {
+-"Unknown",
+-"Needs scanning",
+-"Scanning",
+-"Empty",
+-"Allocating",
+-"Full",
+-"Dirty",
+-"Checkpoint",
+-"Collecting",
+-"Dead"
+-};
+-
+-static void yaffs_VerifyBlock(yaffs_Device *dev, yaffs_BlockInfo *bi, int n)
++static int yaffs_check_chunk_erased(struct yaffs_dev_s *dev,
++				int nand_chunk)
+ {
+-	int actuallyUsed;
+-	int inUse;
++	int retval = YAFFS_OK;
++	__u8 *data = yaffs_get_temp_buffer(dev, __LINE__);
++	yaffs_ext_tags tags;
++	int result;
+ 
+-	if (yaffs_SkipVerification(dev))
+-		return;
++	result = yaffs_rd_chunk_tags_nand(dev, nand_chunk, data, &tags);
+ 
+-	/* Report illegal runtime states */
+-	if (bi->blockState >= YAFFS_NUMBER_OF_BLOCK_STATES)
+-		T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has undefined state %d"TENDSTR), n, bi->blockState));
++	if (tags.ecc_result > YAFFS_ECC_RESULT_NO_ERROR)
++		retval = YAFFS_FAIL;
+ 
+-	switch (bi->blockState) {
+-	case YAFFS_BLOCK_STATE_UNKNOWN:
+-	case YAFFS_BLOCK_STATE_SCANNING:
+-	case YAFFS_BLOCK_STATE_NEEDS_SCANNING:
+-		T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has bad run-state %s"TENDSTR),
+-		n, blockStateName[bi->blockState]));
++	if (!yaffs_check_ff(data, dev->data_bytes_per_chunk) || tags.chunk_used) {
++		T(YAFFS_TRACE_NANDACCESS,
++		  (TSTR("Chunk %d not erased" TENDSTR), nand_chunk));
++		retval = YAFFS_FAIL;
+ 	}
+ 
+-	/* Check pages in use and soft deletions are legal */
+-
+-	actuallyUsed = bi->pagesInUse - bi->softDeletions;
+-
+-	if (bi->pagesInUse < 0 || bi->pagesInUse > dev->nChunksPerBlock ||
+-	   bi->softDeletions < 0 || bi->softDeletions > dev->nChunksPerBlock ||
+-	   actuallyUsed < 0 || actuallyUsed > dev->nChunksPerBlock)
+-		T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has illegal values pagesInUsed %d softDeletions %d"TENDSTR),
+-		n, bi->pagesInUse, bi->softDeletions));
+-
++	yaffs_release_temp_buffer(dev, data, __LINE__);
+ 
+-	/* Check chunk bitmap legal */
+-	inUse = yaffs_CountChunkBits(dev, n);
+-	if (inUse != bi->pagesInUse)
+-		T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has inconsistent values pagesInUse %d counted chunk bits %d"TENDSTR),
+-			n, bi->pagesInUse, inUse));
++	return retval;
+ 
+-	/* Check that the sequence number is valid.
+-	 * Ten million is legal, but is very unlikely
+-	 */
+-	if (dev->isYaffs2 &&
+-	   (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING || bi->blockState == YAFFS_BLOCK_STATE_FULL) &&
+-	   (bi->sequenceNumber < YAFFS_LOWEST_SEQUENCE_NUMBER || bi->sequenceNumber > 10000000))
+-		T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has suspect sequence number of %d"TENDSTR),
+-		n, bi->sequenceNumber));
+ }
+ 
+-static void yaffs_VerifyCollectedBlock(yaffs_Device *dev, yaffs_BlockInfo *bi,
+-		int n)
++
++static int yaffs_verify_chunk_written(yaffs_dev_t *dev,
++					int nand_chunk,
++					const __u8 *data,
++					yaffs_ext_tags *tags)
+ {
+-	yaffs_VerifyBlock(dev, bi, n);
++	int retval = YAFFS_OK;
++	yaffs_ext_tags tempTags;
++	__u8 *buffer = yaffs_get_temp_buffer(dev,__LINE__);
++	int result;
++	
++	result = yaffs_rd_chunk_tags_nand(dev,nand_chunk,buffer,&tempTags);
++	if(memcmp(buffer,data,dev->data_bytes_per_chunk) ||
++		tempTags.obj_id != tags->obj_id ||
++		tempTags.chunk_id  != tags->chunk_id ||
++		tempTags.n_bytes != tags->n_bytes)
++		retval = YAFFS_FAIL;
+ 
+-	/* After collection the block should be in the erased state */
+-	/* This will need to change if we do partial gc */
++	yaffs_release_temp_buffer(dev, buffer, __LINE__);
+ 
+-	if (bi->blockState != YAFFS_BLOCK_STATE_COLLECTING &&
+-			bi->blockState != YAFFS_BLOCK_STATE_EMPTY) {
+-		T(YAFFS_TRACE_ERROR, (TSTR("Block %d is in state %d after gc, should be erased"TENDSTR),
+-			n, bi->blockState));
+-	}
++	return retval;
+ }
+ 
+-static void yaffs_VerifyBlocks(yaffs_Device *dev)
++static int yaffs_write_new_chunk(struct yaffs_dev_s *dev,
++					const __u8 *data,
++					yaffs_ext_tags *tags,
++					int useReserve)
+ {
+-	int i;
+-	int nBlocksPerState[YAFFS_NUMBER_OF_BLOCK_STATES];
+-	int nIllegalBlockStates = 0;
+-
+-	if (yaffs_SkipVerification(dev))
+-		return;
+-
+-	memset(nBlocksPerState, 0, sizeof(nBlocksPerState));
+-
+-	for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
+-		yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, i);
+-		yaffs_VerifyBlock(dev, bi, i);
+-
+-		if (bi->blockState < YAFFS_NUMBER_OF_BLOCK_STATES)
+-			nBlocksPerState[bi->blockState]++;
+-		else
+-			nIllegalBlockStates++;
+-	}
++	int attempts = 0;
++	int writeOk = 0;
++	int chunk;
+ 
+-	T(YAFFS_TRACE_VERIFY, (TSTR(""TENDSTR)));
+-	T(YAFFS_TRACE_VERIFY, (TSTR("Block summary"TENDSTR)));
++	yaffs2_checkpt_invalidate(dev);
+ 
+-	T(YAFFS_TRACE_VERIFY, (TSTR("%d blocks have illegal states"TENDSTR), nIllegalBlockStates));
+-	if (nBlocksPerState[YAFFS_BLOCK_STATE_ALLOCATING] > 1)
+-		T(YAFFS_TRACE_VERIFY, (TSTR("Too many allocating blocks"TENDSTR)));
++	do {
++		yaffs_block_info_t *bi = 0;
++		int erasedOk = 0;
+ 
+-	for (i = 0; i < YAFFS_NUMBER_OF_BLOCK_STATES; i++)
+-		T(YAFFS_TRACE_VERIFY,
+-		  (TSTR("%s %d blocks"TENDSTR),
+-		  blockStateName[i], nBlocksPerState[i]));
++		chunk = yaffs_alloc_chunk(dev, useReserve, &bi);
++		if (chunk < 0) {
++			/* no space */
++			break;
++		}
+ 
+-	if (dev->blocksInCheckpoint != nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT])
+-		T(YAFFS_TRACE_VERIFY,
+-		 (TSTR("Checkpoint block count wrong dev %d count %d"TENDSTR),
+-		 dev->blocksInCheckpoint, nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT]));
++		/* First check this chunk is erased, if it needs
++		 * checking.  The checking policy (unless forced
++		 * always on) is as follows:
++		 *
++		 * Check the first page we try to write in a block.
++		 * If the check passes then we don't need to check any
++		 * more.	If the check fails, we check again...
++		 * If the block has been erased, we don't need to check.
++		 *
++		 * However, if the block has been prioritised for gc,
++		 * then we think there might be something odd about
++		 * this block and stop using it.
++		 *
++		 * Rationale: We should only ever see chunks that have
++		 * not been erased if there was a partially written
++		 * chunk due to power loss.  This checking policy should
++		 * catch that case with very few checks and thus save a
++		 * lot of checks that are most likely not needed.
++		 *
++		 * Mods to the above
++		 * If an erase check fails or the write fails we skip the 
++		 * rest of the block.
++		 */
+ 
+-	if (dev->nErasedBlocks != nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY])
+-		T(YAFFS_TRACE_VERIFY,
+-		 (TSTR("Erased block count wrong dev %d count %d"TENDSTR),
+-		 dev->nErasedBlocks, nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY]));
++		/* let's give it a try */
++		attempts++;
+ 
+-	if (nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING] > 1)
+-		T(YAFFS_TRACE_VERIFY,
+-		 (TSTR("Too many collecting blocks %d (max is 1)"TENDSTR),
+-		 nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING]));
++		if(dev->param.always_check_erased)
++			bi->skip_erased_check = 0;
+ 
+-	T(YAFFS_TRACE_VERIFY, (TSTR(""TENDSTR)));
++		if (!bi->skip_erased_check) {
++			erasedOk = yaffs_check_chunk_erased(dev, chunk);
++			if (erasedOk != YAFFS_OK) {
++				T(YAFFS_TRACE_ERROR,
++				(TSTR("**>> yaffs chunk %d was not erased"
++				TENDSTR), chunk));
+ 
+-}
++				/* If not erased, delete this one,
++				 * skip rest of block and
++				 * try another chunk */
++				 yaffs_chunk_del(dev,chunk,1,__LINE__);
++				 yaffs_skip_rest_of_block(dev);
++				continue;
++			}
++		}
+ 
+-/*
+- * Verify the object header. oh must be valid, but obj and tags may be NULL in which
+- * case those tests will not be performed.
+- */
+-static void yaffs_VerifyObjectHeader(yaffs_Object *obj, yaffs_ObjectHeader *oh, yaffs_ExtendedTags *tags, int parentCheck)
+-{
+-	if (obj && yaffs_SkipVerification(obj->myDev))
+-		return;
++		writeOk = yaffs_wr_chunk_tags_nand(dev, chunk,
++				data, tags);
+ 
+-	if (!(tags && obj && oh)) {
+-		T(YAFFS_TRACE_VERIFY,
+-				(TSTR("Verifying object header tags %x obj %x oh %x"TENDSTR),
+-				(__u32)tags, (__u32)obj, (__u32)oh));
+-		return;
+-	}
++		if(!bi->skip_erased_check)
++			writeOk = yaffs_verify_chunk_written(dev, chunk, data, tags);
+ 
+-	if (oh->type <= YAFFS_OBJECT_TYPE_UNKNOWN ||
+-			oh->type > YAFFS_OBJECT_TYPE_MAX)
+-		T(YAFFS_TRACE_VERIFY,
+-			(TSTR("Obj %d header type is illegal value 0x%x"TENDSTR),
+-			tags->objectId, oh->type));
++		if (writeOk != YAFFS_OK) {
++			/* Clean up aborted write, skip to next block and
++			 * try another chunk */
++			yaffs_handle_chunk_wr_error(dev, chunk, erasedOk);
++			continue;
++		}
+ 
+-	if (tags->objectId != obj->objectId)
+-		T(YAFFS_TRACE_VERIFY,
+-			(TSTR("Obj %d header mismatch objectId %d"TENDSTR),
+-			tags->objectId, obj->objectId));
++		bi->skip_erased_check = 1;
+ 
++		/* Copy the data into the robustification buffer */
++		yaffs_handle_chunk_wr_ok(dev, chunk, data, tags);
+ 
+-	/*
+-	 * Check that the object's parent ids match if parentCheck requested.
+-	 *
+-	 * Tests do not apply to the root object.
+-	 */
++	} while (writeOk != YAFFS_OK &&
++		(yaffs_wr_attempts <= 0 || attempts <= yaffs_wr_attempts));
+ 
+-	if (parentCheck && tags->objectId > 1 && !obj->parent)
+-		T(YAFFS_TRACE_VERIFY,
+-			(TSTR("Obj %d header mismatch parentId %d obj->parent is NULL"TENDSTR),
+-			tags->objectId, oh->parentObjectId));
++	if (!writeOk)
++		chunk = -1;
+ 
+-	if (parentCheck && obj->parent &&
+-			oh->parentObjectId != obj->parent->objectId &&
+-			(oh->parentObjectId != YAFFS_OBJECTID_UNLINKED ||
+-			obj->parent->objectId != YAFFS_OBJECTID_DELETED))
+-		T(YAFFS_TRACE_VERIFY,
+-			(TSTR("Obj %d header mismatch parentId %d parentObjectId %d"TENDSTR),
+-			tags->objectId, oh->parentObjectId, obj->parent->objectId));
++	if (attempts > 1) {
++		T(YAFFS_TRACE_ERROR,
++			(TSTR("**>> yaffs write required %d attempts" TENDSTR),
++			attempts));
+ 
+-	if (tags->objectId > 1 && oh->name[0] == 0) /* Null name */
+-		T(YAFFS_TRACE_VERIFY,
+-			(TSTR("Obj %d header name is NULL"TENDSTR),
+-			obj->objectId));
++		dev->n_retired_writes += (attempts - 1);
++	}
+ 
+-	if (tags->objectId > 1 && ((__u8)(oh->name[0])) == 0xff) /* Trashed name */
+-		T(YAFFS_TRACE_VERIFY,
+-			(TSTR("Obj %d header name is 0xFF"TENDSTR),
+-			obj->objectId));
++	return chunk;
+ }
+ 
+ 
++ 
++/*
++ * Block retiring for handling a broken block.
++ */
+ 
+-static int yaffs_VerifyTnodeWorker(yaffs_Object *obj, yaffs_Tnode *tn,
+-					__u32 level, int chunkOffset)
++static void yaffs_retire_block(yaffs_dev_t *dev, int flash_block)
+ {
+-	int i;
+-	yaffs_Device *dev = obj->myDev;
+-	int ok = 1;
++	yaffs_block_info_t *bi = yaffs_get_block_info(dev, flash_block);
+ 
+-	if (tn) {
+-		if (level > 0) {
++	yaffs2_checkpt_invalidate(dev);
++	
++	yaffs2_clear_oldest_dirty_seq(dev,bi);
+ 
+-			for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) {
+-				if (tn->internal[i]) {
+-					ok = yaffs_VerifyTnodeWorker(obj,
+-							tn->internal[i],
+-							level - 1,
+-							(chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i);
+-				}
+-			}
+-		} else if (level == 0) {
+-			yaffs_ExtendedTags tags;
+-			__u32 objectId = obj->objectId;
++	if (yaffs_mark_bad(dev, flash_block) != YAFFS_OK) {
++		if (yaffs_erase_block(dev, flash_block) != YAFFS_OK) {
++			T(YAFFS_TRACE_ALWAYS, (TSTR(
++				"yaffs: Failed to mark bad and erase block %d"
++				TENDSTR), flash_block));
++		} else {
++			yaffs_ext_tags tags;
++			int chunk_id = flash_block * dev->param.chunks_per_block;
+ 
+-			chunkOffset <<=  YAFFS_TNODES_LEVEL0_BITS;
++			__u8 *buffer = yaffs_get_temp_buffer(dev, __LINE__);
+ 
+-			for (i = 0; i < YAFFS_NTNODES_LEVEL0; i++) {
+-				__u32 theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
++			memset(buffer, 0xff, dev->data_bytes_per_chunk);
++			yaffs_init_tags(&tags);
++			tags.seq_number = YAFFS_SEQUENCE_BAD_BLOCK;
++			if (dev->param.write_chunk_tags_fn(dev, chunk_id -
++				dev->chunk_offset, buffer, &tags) != YAFFS_OK)
++				T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Failed to "
++					TCONT("write bad block marker to block %d")
++					TENDSTR), flash_block));
+ 
+-				if (theChunk > 0) {
+-					/* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),tags.objectId,tags.chunkId,theChunk)); */
+-					yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL, &tags);
+-					if (tags.objectId != objectId || tags.chunkId != chunkOffset) {
+-						T(~0, (TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR),
+-							objectId, chunkOffset, theChunk,
+-							tags.objectId, tags.chunkId));
+-					}
+-				}
+-				chunkOffset++;
+-			}
++			yaffs_release_temp_buffer(dev, buffer, __LINE__);
+ 		}
+ 	}
+ 
+-	return ok;
++	bi->block_state = YAFFS_BLOCK_STATE_DEAD;
++	bi->gc_prioritise = 0;
++	bi->needs_retiring = 0;
+ 
++	dev->n_retired_blocks++;
+ }
+ 
++/*
++ * Functions for robustisizing TODO
++ *
++ */
+ 
+-static void yaffs_VerifyFile(yaffs_Object *obj)
++static void yaffs_handle_chunk_wr_ok(yaffs_dev_t *dev, int nand_chunk,
++				const __u8 *data,
++				const yaffs_ext_tags *tags)
+ {
+-	int requiredTallness;
+-	int actualTallness;
+-	__u32 lastChunk;
+-	__u32 x;
+-	__u32 i;
+-	yaffs_Device *dev;
+-	yaffs_ExtendedTags tags;
+-	yaffs_Tnode *tn;
+-	__u32 objectId;
++	dev=dev;
++	nand_chunk=nand_chunk;
++	data=data;
++	tags=tags;
++}
+ 
+-	if (!obj)
+-		return;
++static void yaffs_handle_chunk_update(yaffs_dev_t *dev, int nand_chunk,
++				const yaffs_ext_tags *tags)
++{
++	dev=dev;
++	nand_chunk=nand_chunk;
++	tags=tags;
++}
+ 
+-	if (yaffs_SkipVerification(obj->myDev))
+-		return;
++void yaffs_handle_chunk_error(yaffs_dev_t *dev, yaffs_block_info_t *bi)
++{
++	if (!bi->gc_prioritise) {
++		bi->gc_prioritise = 1;
++		dev->has_pending_prioritised_gc = 1;
++		bi->chunk_error_strikes++;
+ 
+-	dev = obj->myDev;
+-	objectId = obj->objectId;
++		if (bi->chunk_error_strikes > 3) {
++			bi->needs_retiring = 1; /* Too many stikes, so retire this */
++			T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Block struck out" TENDSTR)));
+ 
+-	/* Check file size is consistent with tnode depth */
+-	lastChunk =  obj->variant.fileVariant.fileSize / dev->nDataBytesPerChunk + 1;
+-	x = lastChunk >> YAFFS_TNODES_LEVEL0_BITS;
+-	requiredTallness = 0;
+-	while (x > 0) {
+-		x >>= YAFFS_TNODES_INTERNAL_BITS;
+-		requiredTallness++;
++		}
+ 	}
++}
+ 
+-	actualTallness = obj->variant.fileVariant.topLevel;
++static void yaffs_handle_chunk_wr_error(yaffs_dev_t *dev, int nand_chunk,
++		int erasedOk)
++{
++	int flash_block = nand_chunk / dev->param.chunks_per_block;
++	yaffs_block_info_t *bi = yaffs_get_block_info(dev, flash_block);
+ 
+-	if (requiredTallness > actualTallness)
+-		T(YAFFS_TRACE_VERIFY,
+-		(TSTR("Obj %d had tnode tallness %d, needs to be %d"TENDSTR),
+-		 obj->objectId, actualTallness, requiredTallness));
++	yaffs_handle_chunk_error(dev, bi);
+ 
++	if (erasedOk) {
++		/* Was an actual write failure, so mark the block for retirement  */
++		bi->needs_retiring = 1;
++		T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
++		  (TSTR("**>> Block %d needs retiring" TENDSTR), flash_block));
++	}
+ 
+-	/* Check that the chunks in the tnode tree are all correct.
+-	 * We do this by scanning through the tnode tree and
+-	 * checking the tags for every chunk match.
+-	 */
++	/* Delete the chunk */
++	yaffs_chunk_del(dev, nand_chunk, 1, __LINE__);
++	yaffs_skip_rest_of_block(dev);
++}
+ 
+-	if (yaffs_SkipNANDVerification(dev))
+-		return;
+ 
+-	for (i = 1; i <= lastChunk; i++) {
+-		tn = yaffs_FindLevel0Tnode(dev, &obj->variant.fileVariant, i);
++/*---------------- Name handling functions ------------*/
+ 
+-		if (tn) {
+-			__u32 theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
+-			if (theChunk > 0) {
+-				/* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),objectId,i,theChunk)); */
+-				yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL, &tags);
+-				if (tags.objectId != objectId || tags.chunkId != i) {
+-					T(~0, (TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR),
+-						objectId, i, theChunk,
+-						tags.objectId, tags.chunkId));
+-				}
+-			}
++static __u16 yaffs_calc_name_sum(const YCHAR *name)
++{
++	__u16 sum = 0;
++	__u16 i = 1;
++
++	const YUCHAR *bname = (const YUCHAR *) name;
++	if (bname) {
++		while ((*bname) && (i < (YAFFS_MAX_NAME_LENGTH/2))) {
++
++#ifdef CONFIG_YAFFS_CASE_INSENSITIVE
++			sum += yaffs_toupper(*bname) * i;
++#else
++			sum += (*bname) * i;
++#endif
++			i++;
++			bname++;
+ 		}
+ 	}
++	return sum;
+ }
+ 
+-
+-static void yaffs_VerifyHardLink(yaffs_Object *obj)
++void yaffs_set_obj_name(yaffs_obj_t *obj, const YCHAR *name)
+ {
+-	if (obj && yaffs_SkipVerification(obj->myDev))
+-		return;
+-
+-	/* Verify sane equivalent object */
++#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
++	memset(obj->short_name, 0, sizeof(YCHAR) * (YAFFS_SHORT_NAME_LENGTH+1));
++	if (name && yaffs_strnlen(name,YAFFS_SHORT_NAME_LENGTH+1) <= YAFFS_SHORT_NAME_LENGTH)
++		yaffs_strcpy(obj->short_name, name);
++	else
++		obj->short_name[0] = _Y('\0');
++#endif
++	obj->sum = yaffs_calc_name_sum(name);
+ }
+ 
+-static void yaffs_VerifySymlink(yaffs_Object *obj)
++void yaffs_set_obj_name_from_oh(yaffs_obj_t *obj, const yaffs_obj_header *oh)
+ {
+-	if (obj && yaffs_SkipVerification(obj->myDev))
+-		return;
+-
+-	/* Verify symlink string */
++#ifdef CONFIG_YAFFS_AUTO_UNICODE
++	YCHAR tmpName[YAFFS_MAX_NAME_LENGTH+1];
++	memset(tmpName,0,sizeof(tmpName));
++	yaffs_load_name_from_oh(obj->my_dev,tmpName,oh->name,YAFFS_MAX_NAME_LENGTH+1);
++	yaffs_set_obj_name(obj,tmpName);
++#else
++	yaffs_set_obj_name(obj,oh->name);
++#endif
+ }
+ 
+-static void yaffs_VerifySpecial(yaffs_Object *obj)
+-{
+-	if (obj && yaffs_SkipVerification(obj->myDev))
+-		return;
+-}
+-
+-static void yaffs_VerifyObject(yaffs_Object *obj)
+-{
+-	yaffs_Device *dev;
+-
+-	__u32 chunkMin;
+-	__u32 chunkMax;
+-
+-	__u32 chunkIdOk;
+-	__u32 chunkInRange;
+-	__u32 chunkShouldNotBeDeleted;
+-	__u32 chunkValid;
+-
+-	if (!obj)
+-		return;
+-
+-	if (obj->beingCreated)
+-		return;
++/*-------------------- TNODES -------------------
+ 
+-	dev = obj->myDev;
++ * List of spare tnodes
++ * The list is hooked together using the first pointer
++ * in the tnode.
++ */
+ 
+-	if (yaffs_SkipVerification(dev))
+-		return;
+ 
+-	/* Check sane object header chunk */
++yaffs_tnode_t *yaffs_get_tnode(yaffs_dev_t *dev)
++{
++	yaffs_tnode_t *tn = yaffs_alloc_raw_tnode(dev);
++	if (tn){
++		memset(tn, 0, dev->tnode_size);
++		dev->n_tnodes++;
++	}
+ 
+-	chunkMin = dev->internalStartBlock * dev->nChunksPerBlock;
+-	chunkMax = (dev->internalEndBlock+1) * dev->nChunksPerBlock - 1;
++	dev->checkpoint_blocks_required = 0; /* force recalculation*/
+ 
+-	chunkInRange = (((unsigned)(obj->hdrChunk)) >= chunkMin && ((unsigned)(obj->hdrChunk)) <= chunkMax);
+-	chunkIdOk = chunkInRange || obj->hdrChunk == 0;
+-	chunkValid = chunkInRange &&
+-			yaffs_CheckChunkBit(dev,
+-					obj->hdrChunk / dev->nChunksPerBlock,
+-					obj->hdrChunk % dev->nChunksPerBlock);
+-	chunkShouldNotBeDeleted = chunkInRange && !chunkValid;
++	return tn;
++}
+ 
+-	if (!obj->fake &&
+-			(!chunkIdOk || chunkShouldNotBeDeleted)) {
+-		T(YAFFS_TRACE_VERIFY,
+-			(TSTR("Obj %d has chunkId %d %s %s"TENDSTR),
+-			obj->objectId, obj->hdrChunk,
+-			chunkIdOk ? "" : ",out of range",
+-			chunkShouldNotBeDeleted ? ",marked as deleted" : ""));
+-	}
++/* FreeTnode frees up a tnode and puts it back on the free list */
++static void yaffs_free_tnode(yaffs_dev_t *dev, yaffs_tnode_t *tn)
++{
++	yaffs_free_raw_tnode(dev,tn);
++	dev->n_tnodes--;
++	dev->checkpoint_blocks_required = 0; /* force recalculation*/
++}
+ 
+-	if (chunkValid && !yaffs_SkipNANDVerification(dev)) {
+-		yaffs_ExtendedTags tags;
+-		yaffs_ObjectHeader *oh;
+-		__u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
++static void yaffs_deinit_tnodes_and_objs(yaffs_dev_t *dev)
++{
++	yaffs_deinit_raw_tnodes_and_objs(dev);
++	dev->n_obj = 0;
++	dev->n_tnodes = 0;
++}
+ 
+-		oh = (yaffs_ObjectHeader *)buffer;
+ 
+-		yaffs_ReadChunkWithTagsFromNAND(dev, obj->hdrChunk, buffer,
+-				&tags);
++void yaffs_load_tnode_0(yaffs_dev_t *dev, yaffs_tnode_t *tn, unsigned pos,
++		unsigned val)
++{
++	__u32 *map = (__u32 *)tn;
++	__u32 bitInMap;
++	__u32 bitInWord;
++	__u32 wordInMap;
++	__u32 mask;
+ 
+-		yaffs_VerifyObjectHeader(obj, oh, &tags, 1);
++	pos &= YAFFS_TNODES_LEVEL0_MASK;
++	val >>= dev->chunk_grp_bits;
+ 
+-		yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
+-	}
++	bitInMap = pos * dev->tnode_width;
++	wordInMap = bitInMap / 32;
++	bitInWord = bitInMap & (32 - 1);
+ 
+-	/* Verify it has a parent */
+-	if (obj && !obj->fake &&
+-			(!obj->parent || obj->parent->myDev != dev)) {
+-		T(YAFFS_TRACE_VERIFY,
+-			(TSTR("Obj %d has parent pointer %p which does not look like an object"TENDSTR),
+-			obj->objectId, obj->parent));
+-	}
++	mask = dev->tnode_mask << bitInWord;
+ 
+-	/* Verify parent is a directory */
+-	if (obj->parent && obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
+-		T(YAFFS_TRACE_VERIFY,
+-			(TSTR("Obj %d's parent is not a directory (type %d)"TENDSTR),
+-			obj->objectId, obj->parent->variantType));
+-	}
++	map[wordInMap] &= ~mask;
++	map[wordInMap] |= (mask & (val << bitInWord));
+ 
+-	switch (obj->variantType) {
+-	case YAFFS_OBJECT_TYPE_FILE:
+-		yaffs_VerifyFile(obj);
+-		break;
+-	case YAFFS_OBJECT_TYPE_SYMLINK:
+-		yaffs_VerifySymlink(obj);
+-		break;
+-	case YAFFS_OBJECT_TYPE_DIRECTORY:
+-		yaffs_VerifyDirectory(obj);
+-		break;
+-	case YAFFS_OBJECT_TYPE_HARDLINK:
+-		yaffs_VerifyHardLink(obj);
+-		break;
+-	case YAFFS_OBJECT_TYPE_SPECIAL:
+-		yaffs_VerifySpecial(obj);
+-		break;
+-	case YAFFS_OBJECT_TYPE_UNKNOWN:
+-	default:
+-		T(YAFFS_TRACE_VERIFY,
+-		(TSTR("Obj %d has illegaltype %d"TENDSTR),
+-		obj->objectId, obj->variantType));
+-		break;
++	if (dev->tnode_width > (32 - bitInWord)) {
++		bitInWord = (32 - bitInWord);
++		wordInMap++;;
++		mask = dev->tnode_mask >> (/*dev->tnode_width -*/ bitInWord);
++		map[wordInMap] &= ~mask;
++		map[wordInMap] |= (mask & (val >> bitInWord));
+ 	}
+ }
+ 
+-static void yaffs_VerifyObjects(yaffs_Device *dev)
++__u32 yaffs_get_group_base(yaffs_dev_t *dev, yaffs_tnode_t *tn,
++		unsigned pos)
+ {
+-	yaffs_Object *obj;
+-	int i;
+-	struct ylist_head *lh;
++	__u32 *map = (__u32 *)tn;
++	__u32 bitInMap;
++	__u32 bitInWord;
++	__u32 wordInMap;
++	__u32 val;
+ 
+-	if (yaffs_SkipVerification(dev))
+-		return;
++	pos &= YAFFS_TNODES_LEVEL0_MASK;
+ 
+-	/* Iterate through the objects in each hash entry */
++	bitInMap = pos * dev->tnode_width;
++	wordInMap = bitInMap / 32;
++	bitInWord = bitInMap & (32 - 1);
+ 
+-	for (i = 0; i <  YAFFS_NOBJECT_BUCKETS; i++) {
+-		ylist_for_each(lh, &dev->objectBucket[i].list) {
+-			if (lh) {
+-				obj = ylist_entry(lh, yaffs_Object, hashLink);
+-				yaffs_VerifyObject(obj);
+-			}
+-		}
+-	}
+-}
++	val = map[wordInMap] >> bitInWord;
+ 
++	if	(dev->tnode_width > (32 - bitInWord)) {
++		bitInWord = (32 - bitInWord);
++		wordInMap++;;
++		val |= (map[wordInMap] << bitInWord);
++	}
+ 
+-/*
+- *  Simple hash function. Needs to have a reasonable spread
+- */
++	val &= dev->tnode_mask;
++	val <<= dev->chunk_grp_bits;
+ 
+-static Y_INLINE int yaffs_HashFunction(int n)
+-{
+-	n = abs(n);
+-	return n % YAFFS_NOBJECT_BUCKETS;
++	return val;
+ }
+ 
+-/*
+- * Access functions to useful fake objects.
+- * Note that root might have a presence in NAND if permissions are set.
++/* ------------------- End of individual tnode manipulation -----------------*/
++
++/* ---------Functions to manipulate the look-up tree (made up of tnodes) ------
++ * The look up tree is represented by the top tnode and the number of top_level
++ * in the tree. 0 means only the level 0 tnode is in the tree.
+  */
+ 
+-yaffs_Object *yaffs_Root(yaffs_Device *dev)
++/* FindLevel0Tnode finds the level 0 tnode, if one exists. */
++yaffs_tnode_t *yaffs_find_tnode_0(yaffs_dev_t *dev,
++					yaffs_file_s *file_struct,
++					__u32 chunk_id)
+ {
+-	return dev->rootDir;
+-}
++	yaffs_tnode_t *tn = file_struct->top;
++	__u32 i;
++	int requiredTallness;
++	int level = file_struct->top_level;
+ 
+-yaffs_Object *yaffs_LostNFound(yaffs_Device *dev)
+-{
+-	return dev->lostNFoundDir;
+-}
++	dev=dev;
+ 
++	/* Check sane level and chunk Id */
++	if (level < 0 || level > YAFFS_TNODES_MAX_LEVEL)
++		return NULL;
+ 
+-/*
+- *  Erased NAND checking functions
+- */
++	if (chunk_id > YAFFS_MAX_CHUNK_ID)
++		return NULL;
+ 
+-int yaffs_CheckFF(__u8 *buffer, int nBytes)
+-{
+-	/* Horrible, slow implementation */
+-	while (nBytes--) {
+-		if (*buffer != 0xFF)
+-			return 0;
+-		buffer++;
++	/* First check we're tall enough (ie enough top_level) */
++
++	i = chunk_id >> YAFFS_TNODES_LEVEL0_BITS;
++	requiredTallness = 0;
++	while (i) {
++		i >>= YAFFS_TNODES_INTERNAL_BITS;
++		requiredTallness++;
+ 	}
+-	return 1;
+-}
+ 
+-static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,
+-				int chunkInNAND)
+-{
+-	int retval = YAFFS_OK;
+-	__u8 *data = yaffs_GetTempBuffer(dev, __LINE__);
+-	yaffs_ExtendedTags tags;
+-	int result;
++	if (requiredTallness > file_struct->top_level)
++		return NULL; /* Not tall enough, so we can't find it */
++
++	/* Traverse down to level 0 */
++	while (level > 0 && tn) {
++		tn = tn->internal[(chunk_id >>
++			(YAFFS_TNODES_LEVEL0_BITS +
++				(level - 1) *
++				YAFFS_TNODES_INTERNAL_BITS)) &
++			YAFFS_TNODES_INTERNAL_MASK];
++		level--;
++	}
+ 
+-	result = yaffs_ReadChunkWithTagsFromNAND(dev, chunkInNAND, data, &tags);
++	return tn;
++}
+ 
+-	if (tags.eccResult > YAFFS_ECC_RESULT_NO_ERROR)
+-		retval = YAFFS_FAIL;
++/* AddOrFindLevel0Tnode finds the level 0 tnode if it exists, otherwise first expands the tree.
++ * This happens in two steps:
++ *  1. If the tree isn't tall enough, then make it taller.
++ *  2. Scan down the tree towards the level 0 tnode adding tnodes if required.
++ *
++ * Used when modifying the tree.
++ *
++ *  If the tn argument is NULL, then a fresh tnode will be added otherwise the specified tn will
++ *  be plugged into the ttree.
++ */
+ 
+-	if (!yaffs_CheckFF(data, dev->nDataBytesPerChunk) || tags.chunkUsed) {
+-		T(YAFFS_TRACE_NANDACCESS,
+-		  (TSTR("Chunk %d not erased" TENDSTR), chunkInNAND));
+-		retval = YAFFS_FAIL;
+-	}
++yaffs_tnode_t *yaffs_add_find_tnode_0(yaffs_dev_t *dev,
++					yaffs_file_s *file_struct,
++					__u32 chunk_id,
++					yaffs_tnode_t *passed_tn)
++{
++	int requiredTallness;
++	int i;
++	int l;
++	yaffs_tnode_t *tn;
+ 
+-	yaffs_ReleaseTempBuffer(dev, data, __LINE__);
++	__u32 x;
+ 
+-	return retval;
+ 
+-}
++	/* Check sane level and page Id */
++	if (file_struct->top_level < 0 || file_struct->top_level > YAFFS_TNODES_MAX_LEVEL)
++		return NULL;
+ 
+-static int yaffs_WriteNewChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev,
+-					const __u8 *data,
+-					yaffs_ExtendedTags *tags,
+-					int useReserve)
+-{
+-	int attempts = 0;
+-	int writeOk = 0;
+-	int chunk;
++	if (chunk_id > YAFFS_MAX_CHUNK_ID)
++		return NULL;
+ 
+-	yaffs_InvalidateCheckpoint(dev);
++	/* First check we're tall enough (ie enough top_level) */
+ 
+-	do {
+-		yaffs_BlockInfo *bi = 0;
+-		int erasedOk = 0;
++	x = chunk_id >> YAFFS_TNODES_LEVEL0_BITS;
++	requiredTallness = 0;
++	while (x) {
++		x >>= YAFFS_TNODES_INTERNAL_BITS;
++		requiredTallness++;
++	}
+ 
+-		chunk = yaffs_AllocateChunk(dev, useReserve, &bi);
+-		if (chunk < 0) {
+-			/* no space */
+-			break;
+-		}
+ 
+-		/* First check this chunk is erased, if it needs
+-		 * checking.  The checking policy (unless forced
+-		 * always on) is as follows:
+-		 *
+-		 * Check the first page we try to write in a block.
+-		 * If the check passes then we don't need to check any
+-		 * more.	If the check fails, we check again...
+-		 * If the block has been erased, we don't need to check.
+-		 *
+-		 * However, if the block has been prioritised for gc,
+-		 * then we think there might be something odd about
+-		 * this block and stop using it.
+-		 *
+-		 * Rationale: We should only ever see chunks that have
+-		 * not been erased if there was a partially written
+-		 * chunk due to power loss.  This checking policy should
+-		 * catch that case with very few checks and thus save a
+-		 * lot of checks that are most likely not needed.
+-		 */
+-		if (bi->gcPrioritise) {
+-			yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
+-			/* try another chunk */
+-			continue;
+-		}
++	if (requiredTallness > file_struct->top_level) {
++		/* Not tall enough, gotta make the tree taller */
++		for (i = file_struct->top_level; i < requiredTallness; i++) {
+ 
+-		/* let's give it a try */
+-		attempts++;
++			tn = yaffs_get_tnode(dev);
+ 
+-#ifdef CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED
+-		bi->skipErasedCheck = 0;
+-#endif
+-		if (!bi->skipErasedCheck) {
+-			erasedOk = yaffs_CheckChunkErased(dev, chunk);
+-			if (erasedOk != YAFFS_OK) {
++			if (tn) {
++				tn->internal[0] = file_struct->top;
++				file_struct->top = tn;
++				file_struct->top_level++;
++			} else {
+ 				T(YAFFS_TRACE_ERROR,
+-				(TSTR("**>> yaffs chunk %d was not erased"
+-				TENDSTR), chunk));
+-
+-				/* try another chunk */
+-				continue;
++					(TSTR("yaffs: no more tnodes" TENDSTR)));
++				return NULL;
+ 			}
+-			bi->skipErasedCheck = 1;
+ 		}
++	}
+ 
+-		writeOk = yaffs_WriteChunkWithTagsToNAND(dev, chunk,
+-				data, tags);
+-		if (writeOk != YAFFS_OK) {
+-			yaffs_HandleWriteChunkError(dev, chunk, erasedOk);
+-			/* try another chunk */
+-			continue;
+-		}
++	/* Traverse down to level 0, adding anything we need */
+ 
+-		/* Copy the data into the robustification buffer */
+-		yaffs_HandleWriteChunkOk(dev, chunk, data, tags);
++	l = file_struct->top_level;
++	tn = file_struct->top;
+ 
+-	} while (writeOk != YAFFS_OK &&
+-		(yaffs_wr_attempts <= 0 || attempts <= yaffs_wr_attempts));
++	if (l > 0) {
++		while (l > 0 && tn) {
++			x = (chunk_id >>
++			     (YAFFS_TNODES_LEVEL0_BITS +
++			      (l - 1) * YAFFS_TNODES_INTERNAL_BITS)) &
++			    YAFFS_TNODES_INTERNAL_MASK;
+ 
+-	if (!writeOk)
+-		chunk = -1;
+ 
+-	if (attempts > 1) {
+-		T(YAFFS_TRACE_ERROR,
+-			(TSTR("**>> yaffs write required %d attempts" TENDSTR),
+-			attempts));
++			if ((l > 1) && !tn->internal[x]) {
++				/* Add missing non-level-zero tnode */
++				tn->internal[x] = yaffs_get_tnode(dev);
++				if(!tn->internal[x])
++					return NULL;
++			} else if (l == 1) {
++				/* Looking from level 1 at level 0 */
++				if (passed_tn) {
++					/* If we already have one, then release it.*/
++					if (tn->internal[x])
++						yaffs_free_tnode(dev, tn->internal[x]);
++					tn->internal[x] = passed_tn;
++
++				} else if (!tn->internal[x]) {
++					/* Don't have one, none passed in */
++					tn->internal[x] = yaffs_get_tnode(dev);
++					if(!tn->internal[x])
++						return NULL;
++				}
++			}
+ 
+-		dev->nRetriedWrites += (attempts - 1);
++			tn = tn->internal[x];
++			l--;
++		}
++	} else {
++		/* top is level 0 */
++		if (passed_tn) {
++			memcpy(tn, passed_tn, (dev->tnode_width * YAFFS_NTNODES_LEVEL0)/8);
++			yaffs_free_tnode(dev, passed_tn);
++		}
+ 	}
+ 
+-	return chunk;
++	return tn;
+ }
+ 
+-/*
+- * Block retiring for handling a broken block.
+- */
+-
+-static void yaffs_RetireBlock(yaffs_Device *dev, int blockInNAND)
++static int yaffs_find_chunk_in_group(yaffs_dev_t *dev, int theChunk,
++				yaffs_ext_tags *tags, int obj_id,
++				int inode_chunk)
+ {
+-	yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
++	int j;
+ 
+-	yaffs_InvalidateCheckpoint(dev);
++	for (j = 0; theChunk && j < dev->chunk_grp_size; j++) {
++		if (yaffs_check_chunk_bit(dev, theChunk / dev->param.chunks_per_block,
++				theChunk % dev->param.chunks_per_block)) {
++			
++			if(dev->chunk_grp_size == 1)
++				return theChunk;
++			else {
++				yaffs_rd_chunk_tags_nand(dev, theChunk, NULL,
++								tags);
++				if (yaffs_tags_match(tags, obj_id, inode_chunk)) {
++					/* found it; */
++					return theChunk;
++				}
++			}
++		}
++		theChunk++;
++	}
++	return -1;
++}
+ 
+-	if (yaffs_MarkBlockBad(dev, blockInNAND) != YAFFS_OK) {
+-		if (yaffs_EraseBlockInNAND(dev, blockInNAND) != YAFFS_OK) {
+-			T(YAFFS_TRACE_ALWAYS, (TSTR(
+-				"yaffs: Failed to mark bad and erase block %d"
+-				TENDSTR), blockInNAND));
+-		} else {
+-			yaffs_ExtendedTags tags;
+-			int chunkId = blockInNAND * dev->nChunksPerBlock;
++#if 0
++/* Experimental code not being used yet. Might speed up file deletion */
++/* DeleteWorker scans backwards through the tnode tree and deletes all the
++ * chunks and tnodes in the file.
++ * Returns 1 if the tree was deleted.
++ * Returns 0 if it stopped early due to hitting the limit and the delete is incomplete.
++ */
+ 
+-			__u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
++static int yaffs_del_worker(yaffs_obj_t *in, yaffs_tnode_t *tn, __u32 level,
++			      int chunk_offset, int *limit)
++{
++	int i;
++	int inode_chunk;
++	int theChunk;
++	yaffs_ext_tags tags;
++	int foundChunk;
++	yaffs_dev_t *dev = in->my_dev;
+ 
+-			memset(buffer, 0xff, dev->nDataBytesPerChunk);
+-			yaffs_InitialiseTags(&tags);
+-			tags.sequenceNumber = YAFFS_SEQUENCE_BAD_BLOCK;
+-			if (dev->writeChunkWithTagsToNAND(dev, chunkId -
+-				dev->chunkOffset, buffer, &tags) != YAFFS_OK)
+-				T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Failed to "
+-					TCONT("write bad block marker to block %d")
+-					TENDSTR), blockInNAND));
++	int allDone = 1;
+ 
+-			yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
+-		}
+-	}
++	if (tn) {
++		if (level > 0) {
++			for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0;
++			     i--) {
++				if (tn->internal[i]) {
++					if (limit && (*limit) < 0) {
++						allDone = 0;
++					} else {
++						allDone =
++							yaffs_del_worker(in,
++								tn->
++								internal
++								[i],
++								level -
++								1,
++								(chunk_offset
++									<<
++									YAFFS_TNODES_INTERNAL_BITS)
++								+ i,
++								limit);
++					}
++					if (allDone) {
++						yaffs_free_tnode(dev,
++								tn->
++								internal[i]);
++						tn->internal[i] = NULL;
++					}
++				}
++			}
++			return (allDone) ? 1 : 0;
++		} else if (level == 0) {
++			int hitLimit = 0;
+ 
+-	bi->blockState = YAFFS_BLOCK_STATE_DEAD;
+-	bi->gcPrioritise = 0;
+-	bi->needsRetiring = 0;
++			for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0 && !hitLimit;
++					i--) {
++				theChunk = yaffs_get_group_base(dev, tn, i);
++				if (theChunk) {
+ 
+-	dev->nRetiredBlocks++;
+-}
++					inode_chunk = (chunk_offset <<
++						YAFFS_TNODES_LEVEL0_BITS) + i;
+ 
+-/*
+- * Functions for robustisizing TODO
+- *
+- */
++					foundChunk =
++						yaffs_find_chunk_in_group(dev,
++								theChunk,
++								&tags,
++								in->obj_id,
++								inode_chunk);
+ 
+-static void yaffs_HandleWriteChunkOk(yaffs_Device *dev, int chunkInNAND,
+-				const __u8 *data,
+-				const yaffs_ExtendedTags *tags)
+-{
+-}
++					if (foundChunk > 0) {
++						yaffs_chunk_del(dev,
++								  foundChunk, 1,
++								  __LINE__);
++						in->n_data_chunks--;
++						if (limit) {
++							*limit = *limit - 1;
++							if (*limit <= 0)
++								hitLimit = 1;
++						}
+ 
+-static void yaffs_HandleUpdateChunk(yaffs_Device *dev, int chunkInNAND,
+-				const yaffs_ExtendedTags *tags)
+-{
+-}
++					}
+ 
+-void yaffs_HandleChunkError(yaffs_Device *dev, yaffs_BlockInfo *bi)
+-{
+-	if (!bi->gcPrioritise) {
+-		bi->gcPrioritise = 1;
+-		dev->hasPendingPrioritisedGCs = 1;
+-		bi->chunkErrorStrikes++;
++					yaffs_load_tnode_0(dev, tn, i, 0);
++				}
+ 
+-		if (bi->chunkErrorStrikes > 3) {
+-			bi->needsRetiring = 1; /* Too many stikes, so retire this */
+-			T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Block struck out" TENDSTR)));
++			}
++			return (i < 0) ? 1 : 0;
+ 
+ 		}
++
+ 	}
++
++	return 1;
++
+ }
+ 
+-static void yaffs_HandleWriteChunkError(yaffs_Device *dev, int chunkInNAND,
+-		int erasedOk)
++#endif
++
++static void yaffs_soft_del_chunk(yaffs_dev_t *dev, int chunk)
+ {
+-	int blockInNAND = chunkInNAND / dev->nChunksPerBlock;
+-	yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
++	yaffs_block_info_t *theBlock;
++	unsigned block_no;
+ 
+-	yaffs_HandleChunkError(dev, bi);
++	T(YAFFS_TRACE_DELETION, (TSTR("soft delete chunk %d" TENDSTR), chunk));
+ 
+-	if (erasedOk) {
+-		/* Was an actual write failure, so mark the block for retirement  */
+-		bi->needsRetiring = 1;
+-		T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
+-		  (TSTR("**>> Block %d needs retiring" TENDSTR), blockInNAND));
++	block_no =  chunk / dev->param.chunks_per_block;
++	theBlock = yaffs_get_block_info(dev, block_no);
++	if (theBlock) {
++		theBlock->soft_del_pages++;
++		dev->n_free_chunks++;
++		yaffs2_update_oldest_dirty_seq(dev, block_no, theBlock);
+ 	}
+-
+-	/* Delete the chunk */
+-	yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__);
+ }
+ 
++/* SoftDeleteWorker scans backwards through the tnode tree and soft deletes all the chunks in the file.
++ * All soft deleting does is increment the block's softdelete count and pulls the chunk out
++ * of the tnode.
++ * Thus, essentially this is the same as DeleteWorker except that the chunks are soft deleted.
++ */
+ 
+-/*---------------- Name handling functions ------------*/
+-
+-static __u16 yaffs_CalcNameSum(const YCHAR *name)
++static int yaffs_soft_del_worker(yaffs_obj_t *in, yaffs_tnode_t *tn,
++				  __u32 level, int chunk_offset)
+ {
+-	__u16 sum = 0;
+-	__u16 i = 1;
++	int i;
++	int theChunk;
++	int allDone = 1;
++	yaffs_dev_t *dev = in->my_dev;
+ 
+-	const YUCHAR *bname = (const YUCHAR *) name;
+-	if (bname) {
+-		while ((*bname) && (i < (YAFFS_MAX_NAME_LENGTH/2))) {
++	if (tn) {
++		if (level > 0) {
++
++			for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0;
++			     i--) {
++				if (tn->internal[i]) {
++					allDone =
++					    yaffs_soft_del_worker(in,
++								   tn->
++								   internal[i],
++								   level - 1,
++								   (chunk_offset
++								    <<
++								    YAFFS_TNODES_INTERNAL_BITS)
++								   + i);
++					if (allDone) {
++						yaffs_free_tnode(dev,
++								tn->
++								internal[i]);
++						tn->internal[i] = NULL;
++					} else {
++						/* Hoosterman... how could this happen? */
++					}
++				}
++			}
++			return (allDone) ? 1 : 0;
++		} else if (level == 0) {
++
++			for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0; i--) {
++				theChunk = yaffs_get_group_base(dev, tn, i);
++				if (theChunk) {
++					/* Note this does not find the real chunk, only the chunk group.
++					 * We make an assumption that a chunk group is not larger than
++					 * a block.
++					 */
++					yaffs_soft_del_chunk(dev, theChunk);
++					yaffs_load_tnode_0(dev, tn, i, 0);
++				}
++
++			}
++			return 1;
+ 
+-#ifdef CONFIG_YAFFS_CASE_INSENSITIVE
+-			sum += yaffs_toupper(*bname) * i;
+-#else
+-			sum += (*bname) * i;
+-#endif
+-			i++;
+-			bname++;
+ 		}
++
+ 	}
+-	return sum;
++
++	return 1;
++
+ }
+ 
+-static void yaffs_SetObjectName(yaffs_Object *obj, const YCHAR *name)
++static void yaffs_soft_del_file(yaffs_obj_t *obj)
+ {
+-#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
+-	memset(obj->shortName, 0, sizeof(YCHAR) * (YAFFS_SHORT_NAME_LENGTH+1));
+-	if (name && yaffs_strlen(name) <= YAFFS_SHORT_NAME_LENGTH)
+-		yaffs_strcpy(obj->shortName, name);
+-	else
+-		obj->shortName[0] = _Y('\0');
+-#endif
+-	obj->sum = yaffs_CalcNameSum(name);
++	if (obj->deleted &&
++	    obj->variant_type == YAFFS_OBJECT_TYPE_FILE && !obj->soft_del) {
++		if (obj->n_data_chunks <= 0) {
++			/* Empty file with no duplicate object headers, just delete it immediately */
++			yaffs_free_tnode(obj->my_dev,
++					obj->variant.file_variant.top);
++			obj->variant.file_variant.top = NULL;
++			T(YAFFS_TRACE_TRACING,
++			  (TSTR("yaffs: Deleting empty file %d" TENDSTR),
++			   obj->obj_id));
++			yaffs_generic_obj_del(obj);
++		} else {
++			yaffs_soft_del_worker(obj,
++					       obj->variant.file_variant.top,
++					       obj->variant.file_variant.
++					       top_level, 0);
++			obj->soft_del = 1;
++		}
++	}
+ }
+ 
+-/*-------------------- TNODES -------------------
+-
+- * List of spare tnodes
+- * The list is hooked together using the first pointer
+- * in the tnode.
+- */
+-
+-/* yaffs_CreateTnodes creates a bunch more tnodes and
+- * adds them to the tnode free list.
+- * Don't use this function directly
++/* Pruning removes any part of the file structure tree that is beyond the
++ * bounds of the file (ie that does not point to chunks).
++ *
++ * A file should only get pruned when its size is reduced.
++ *
++ * Before pruning, the chunks must be pulled from the tree and the
++ * level 0 tnode entries must be zeroed out.
++ * Could also use this for file deletion, but that's probably better handled
++ * by a special case.
++ *
++ * This function is recursive. For levels > 0 the function is called again on
++ * any sub-tree. For level == 0 we just check if the sub-tree has data.
++ * If there is no data in a subtree then it is pruned.
+  */
+ 
+-static int yaffs_CreateTnodes(yaffs_Device *dev, int nTnodes)
++static yaffs_tnode_t *yaffs_prune_worker(yaffs_dev_t *dev, yaffs_tnode_t *tn,
++				__u32 level, int del0)
+ {
+ 	int i;
+-	int tnodeSize;
+-	yaffs_Tnode *newTnodes;
+-	__u8 *mem;
+-	yaffs_Tnode *curr;
+-	yaffs_Tnode *next;
+-	yaffs_TnodeList *tnl;
++	int hasData;
+ 
+-	if (nTnodes < 1)
+-		return YAFFS_OK;
++	if (tn) {
++		hasData = 0;
+ 
+-	/* Calculate the tnode size in bytes for variable width tnode support.
+-	 * Must be a multiple of 32-bits  */
+-	tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
++		if(level > 0){
++			for (i = 0; i < YAFFS_NTNODES_INTERNAL; i++) {
++				if (tn->internal[i]) {
++					tn->internal[i] =
++						yaffs_prune_worker(dev, tn->internal[i],
++							level - 1,
++							(i == 0) ? del0 : 1);
++				}
+ 
+-	if (tnodeSize < sizeof(yaffs_Tnode))
+-		tnodeSize = sizeof(yaffs_Tnode);
++				if (tn->internal[i])
++					hasData++;
++			}
++		} else {
++			int tnode_size_u32 = dev->tnode_size/sizeof(__u32);
++			__u32 *map = (__u32 *)tn;
+ 
+-	/* make these things */
++                        for(i = 0; !hasData && i < tnode_size_u32; i++){
++                                if(map[i])
++                                        hasData++;
++                        }
++                }
+ 
+-	newTnodes = YMALLOC(nTnodes * tnodeSize);
+-	mem = (__u8 *)newTnodes;
++		if (hasData == 0 && del0) {
++			/* Free and return NULL */
+ 
+-	if (!newTnodes) {
+-		T(YAFFS_TRACE_ERROR,
+-			(TSTR("yaffs: Could not allocate Tnodes" TENDSTR)));
+-		return YAFFS_FAIL;
+-	}
++			yaffs_free_tnode(dev, tn);
++			tn = NULL;
++		}
+ 
+-	/* Hook them into the free list */
+-#if 0
+-	for (i = 0; i < nTnodes - 1; i++) {
+-		newTnodes[i].internal[0] = &newTnodes[i + 1];
+-#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
+-		newTnodes[i].internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
+-#endif
+ 	}
+ 
+-	newTnodes[nTnodes - 1].internal[0] = dev->freeTnodes;
+-#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
+-	newTnodes[nTnodes - 1].internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
+-#endif
+-	dev->freeTnodes = newTnodes;
+-#else
+-	/* New hookup for wide tnodes */
+-	for (i = 0; i < nTnodes - 1; i++) {
+-		curr = (yaffs_Tnode *) &mem[i * tnodeSize];
+-		next = (yaffs_Tnode *) &mem[(i+1) * tnodeSize];
+-		curr->internal[0] = next;
+-	}
++	return tn;
+ 
+-	curr = (yaffs_Tnode *) &mem[(nTnodes - 1) * tnodeSize];
+-	curr->internal[0] = dev->freeTnodes;
+-	dev->freeTnodes = (yaffs_Tnode *)mem;
++}
+ 
+-#endif
++static int yaffs_prune_tree(yaffs_dev_t *dev,
++				yaffs_file_s *file_struct)
++{
++	int i;
++	int hasData;
++	int done = 0;
++	yaffs_tnode_t *tn;
+ 
++	if (file_struct->top_level > 0) {
++		file_struct->top =
++		    yaffs_prune_worker(dev, file_struct->top, file_struct->top_level, 0);
++
++		/* Now we have a tree with all the non-zero branches NULL but the height
++		 * is the same as it was.
++		 * Let's see if we can trim internal tnodes to shorten the tree.
++		 * We can do this if only the 0th element in the tnode is in use
++		 * (ie all the non-zero are NULL)
++		 */
+ 
+-	dev->nFreeTnodes += nTnodes;
+-	dev->nTnodesCreated += nTnodes;
++		while (file_struct->top_level && !done) {
++			tn = file_struct->top;
+ 
+-	/* Now add this bunch of tnodes to a list for freeing up.
+-	 * NB If we can't add this to the management list it isn't fatal
+-	 * but it just means we can't free this bunch of tnodes later.
+-	 */
++			hasData = 0;
++			for (i = 1; i < YAFFS_NTNODES_INTERNAL; i++) {
++				if (tn->internal[i])
++					hasData++;
++			}
+ 
+-	tnl = YMALLOC(sizeof(yaffs_TnodeList));
+-	if (!tnl) {
+-		T(YAFFS_TRACE_ERROR,
+-		  (TSTR
+-		   ("yaffs: Could not add tnodes to management list" TENDSTR)));
+-		   return YAFFS_FAIL;
+-	} else {
+-		tnl->tnodes = newTnodes;
+-		tnl->next = dev->allocatedTnodeList;
+-		dev->allocatedTnodeList = tnl;
++			if (!hasData) {
++				file_struct->top = tn->internal[0];
++				file_struct->top_level--;
++				yaffs_free_tnode(dev, tn);
++			} else {
++				done = 1;
++			}
++		}
+ 	}
+ 
+-	T(YAFFS_TRACE_ALLOCATE, (TSTR("yaffs: Tnodes added" TENDSTR)));
+-
+ 	return YAFFS_OK;
+ }
+ 
+-/* GetTnode gets us a clean tnode. Tries to make allocate more if we run out */
++/*-------------------- End of File Structure functions.-------------------*/
++
+ 
+-static yaffs_Tnode *yaffs_GetTnodeRaw(yaffs_Device *dev)
++/* AllocateEmptyObject gets us a clean Object. Tries to make allocate more if we run out */
++static yaffs_obj_t *yaffs_alloc_empty_obj(yaffs_dev_t *dev)
+ {
+-	yaffs_Tnode *tn = NULL;
++	yaffs_obj_t *obj = yaffs_alloc_raw_obj(dev);
+ 
+-	/* If there are none left make more */
+-	if (!dev->freeTnodes)
+-		yaffs_CreateTnodes(dev, YAFFS_ALLOCATION_NTNODES);
+-
+-	if (dev->freeTnodes) {
+-		tn = dev->freeTnodes;
+-#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
+-		if (tn->internal[YAFFS_NTNODES_INTERNAL] != (void *)1) {
+-			/* Hoosterman, this thing looks like it isn't in the list */
+-			T(YAFFS_TRACE_ALWAYS,
+-			  (TSTR("yaffs: Tnode list bug 1" TENDSTR)));
+-		}
+-#endif
+-		dev->freeTnodes = dev->freeTnodes->internal[0];
+-		dev->nFreeTnodes--;
+-	}
++	if (obj) {
++		dev->n_obj++;
+ 
+-	dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
++		/* Now sweeten it up... */
+ 
+-	return tn;
+-}
++		memset(obj, 0, sizeof(yaffs_obj_t));
++		obj->being_created = 1;
+ 
+-static yaffs_Tnode *yaffs_GetTnode(yaffs_Device *dev)
+-{
+-	yaffs_Tnode *tn = yaffs_GetTnodeRaw(dev);
+-	int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
++		obj->my_dev = dev;
++		obj->hdr_chunk = 0;
++		obj->variant_type = YAFFS_OBJECT_TYPE_UNKNOWN;
++		YINIT_LIST_HEAD(&(obj->hard_links));
++		YINIT_LIST_HEAD(&(obj->hash_link));
++		YINIT_LIST_HEAD(&obj->siblings);
+ 
+-	if (tnodeSize < sizeof(yaffs_Tnode))
+-		tnodeSize = sizeof(yaffs_Tnode);
+ 
+-	if (tn)
+-		memset(tn, 0, tnodeSize);
++		/* Now make the directory sane */
++		if (dev->root_dir) {
++			obj->parent = dev->root_dir;
++			ylist_add(&(obj->siblings), &dev->root_dir->variant.dir_variant.children);
++		}
+ 
+-	return tn;
++		/* Add it to the lost and found directory.
++		 * NB Can't put root or lostNFound in lostNFound so
++		 * check if lostNFound exists first
++		 */
++		if (dev->lost_n_found)
++			yaffs_add_obj_to_dir(dev->lost_n_found, obj);
++
++		obj->being_created = 0;
++	}
++
++	dev->checkpoint_blocks_required = 0; /* force recalculation*/
++
++	return obj;
+ }
+ 
+-/* FreeTnode frees up a tnode and puts it back on the free list */
+-static void yaffs_FreeTnode(yaffs_Device *dev, yaffs_Tnode *tn)
++static yaffs_obj_t *yaffs_create_fake_dir(yaffs_dev_t *dev, int number,
++					       __u32 mode)
+ {
+-	if (tn) {
+-#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
+-		if (tn->internal[YAFFS_NTNODES_INTERNAL] != 0) {
+-			/* Hoosterman, this thing looks like it is already in the list */
+-			T(YAFFS_TRACE_ALWAYS,
+-			  (TSTR("yaffs: Tnode list bug 2" TENDSTR)));
+-		}
+-		tn->internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
+-#endif
+-		tn->internal[0] = dev->freeTnodes;
+-		dev->freeTnodes = tn;
+-		dev->nFreeTnodes++;
++
++	yaffs_obj_t *obj =
++	    yaffs_new_obj(dev, number, YAFFS_OBJECT_TYPE_DIRECTORY);
++	if (obj) {
++		obj->fake = 1;		/* it is fake so it might have no NAND presence... */
++		obj->rename_allowed = 0;	/* ... and we're not allowed to rename it... */
++		obj->unlink_allowed = 0;	/* ... or unlink it */
++		obj->deleted = 0;
++		obj->unlinked = 0;
++		obj->yst_mode = mode;
++		obj->my_dev = dev;
++		obj->hdr_chunk = 0;	/* Not a valid chunk. */
++	}
++
++	return obj;
++
++}
++
++static void yaffs_unhash_obj(yaffs_obj_t *obj)
++{
++	int bucket;
++	yaffs_dev_t *dev = obj->my_dev;
++
++	/* If it is still linked into the bucket list, free from the list */
++	if (!ylist_empty(&obj->hash_link)) {
++		ylist_del_init(&obj->hash_link);
++		bucket = yaffs_hash_fn(obj->obj_id);
++		dev->obj_bucket[bucket].count--;
+ 	}
+-	dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
+ }
+ 
+-static void yaffs_DeinitialiseTnodes(yaffs_Device *dev)
++/*  FreeObject frees up a Object and puts it back on the free list */
++static void yaffs_free_obj(yaffs_obj_t *obj)
+ {
+-	/* Free the list of allocated tnodes */
+-	yaffs_TnodeList *tmp;
++	yaffs_dev_t *dev = obj->my_dev;
++
++	T(YAFFS_TRACE_OS, (TSTR("FreeObject %p inode %p"TENDSTR), obj, obj->my_inode));
+ 
+-	while (dev->allocatedTnodeList) {
+-		tmp = dev->allocatedTnodeList->next;
++	if (!obj)
++		YBUG();
++	if (obj->parent)
++		YBUG();
++	if (!ylist_empty(&obj->siblings))
++		YBUG();
+ 
+-		YFREE(dev->allocatedTnodeList->tnodes);
+-		YFREE(dev->allocatedTnodeList);
+-		dev->allocatedTnodeList = tmp;
+ 
++	if (obj->my_inode) {
++		/* We're still hooked up to a cached inode.
++		 * Don't delete now, but mark for later deletion
++		 */
++		obj->defered_free = 1;
++		return;
+ 	}
+ 
+-	dev->freeTnodes = NULL;
+-	dev->nFreeTnodes = 0;
+-}
++	yaffs_unhash_obj(obj);
+ 
+-static void yaffs_InitialiseTnodes(yaffs_Device *dev)
+-{
+-	dev->allocatedTnodeList = NULL;
+-	dev->freeTnodes = NULL;
+-	dev->nFreeTnodes = 0;
+-	dev->nTnodesCreated = 0;
++	yaffs_free_raw_obj(dev,obj);
++	dev->n_obj--;
++	dev->checkpoint_blocks_required = 0; /* force recalculation*/
+ }
+ 
+ 
+-void yaffs_PutLevel0Tnode(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos,
+-		unsigned val)
++void yaffs_handle_defered_free(yaffs_obj_t *obj)
+ {
+-	__u32 *map = (__u32 *)tn;
+-	__u32 bitInMap;
+-	__u32 bitInWord;
+-	__u32 wordInMap;
+-	__u32 mask;
+-
+-	pos &= YAFFS_TNODES_LEVEL0_MASK;
+-	val >>= dev->chunkGroupBits;
++	if (obj->defered_free)
++		yaffs_free_obj(obj);
++}
+ 
+-	bitInMap = pos * dev->tnodeWidth;
+-	wordInMap = bitInMap / 32;
+-	bitInWord = bitInMap & (32 - 1);
++static void yaffs_init_tnodes_and_objs(yaffs_dev_t *dev)
++{
++	int i;
+ 
+-	mask = dev->tnodeMask << bitInWord;
++	dev->n_obj = 0;
++	dev->n_tnodes = 0;
+ 
+-	map[wordInMap] &= ~mask;
+-	map[wordInMap] |= (mask & (val << bitInWord));
++	yaffs_init_raw_tnodes_and_objs(dev);
+ 
+-	if (dev->tnodeWidth > (32 - bitInWord)) {
+-		bitInWord = (32 - bitInWord);
+-		wordInMap++;;
+-		mask = dev->tnodeMask >> (/*dev->tnodeWidth -*/ bitInWord);
+-		map[wordInMap] &= ~mask;
+-		map[wordInMap] |= (mask & (val >> bitInWord));
++	for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
++		YINIT_LIST_HEAD(&dev->obj_bucket[i].list);
++		dev->obj_bucket[i].count = 0;
+ 	}
+ }
+ 
+-static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn,
+-		unsigned pos)
++static int yaffs_find_nice_bucket(yaffs_dev_t *dev)
+ {
+-	__u32 *map = (__u32 *)tn;
+-	__u32 bitInMap;
+-	__u32 bitInWord;
+-	__u32 wordInMap;
+-	__u32 val;
++	int i;
++	int l = 999;
++	int lowest = 999999;
+ 
+-	pos &= YAFFS_TNODES_LEVEL0_MASK;
+ 
+-	bitInMap = pos * dev->tnodeWidth;
+-	wordInMap = bitInMap / 32;
+-	bitInWord = bitInMap & (32 - 1);
++	/* Search for the shortest list or one that
++	 * isn't too long.
++	 */
+ 
+-	val = map[wordInMap] >> bitInWord;
++	for (i = 0; i < 10 && lowest > 4; i++) {
++		dev->bucket_finder++;
++		dev->bucket_finder %= YAFFS_NOBJECT_BUCKETS;
++		if (dev->obj_bucket[dev->bucket_finder].count < lowest) {
++			lowest = dev->obj_bucket[dev->bucket_finder].count;
++			l = dev->bucket_finder;
++		}
+ 
+-	if	(dev->tnodeWidth > (32 - bitInWord)) {
+-		bitInWord = (32 - bitInWord);
+-		wordInMap++;;
+-		val |= (map[wordInMap] << bitInWord);
+ 	}
+ 
+-	val &= dev->tnodeMask;
+-	val <<= dev->chunkGroupBits;
+-
+-	return val;
++	return l;
+ }
+ 
+-/* ------------------- End of individual tnode manipulation -----------------*/
+-
+-/* ---------Functions to manipulate the look-up tree (made up of tnodes) ------
+- * The look up tree is represented by the top tnode and the number of topLevel
+- * in the tree. 0 means only the level 0 tnode is in the tree.
+- */
+-
+-/* FindLevel0Tnode finds the level 0 tnode, if one exists. */
+-static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device *dev,
+-					yaffs_FileStructure *fStruct,
+-					__u32 chunkId)
++static int yaffs_new_obj_id(yaffs_dev_t *dev)
+ {
+-	yaffs_Tnode *tn = fStruct->top;
+-	__u32 i;
+-	int requiredTallness;
+-	int level = fStruct->topLevel;
+-
+-	/* Check sane level and chunk Id */
+-	if (level < 0 || level > YAFFS_TNODES_MAX_LEVEL)
+-		return NULL;
++	int bucket = yaffs_find_nice_bucket(dev);
+ 
+-	if (chunkId > YAFFS_MAX_CHUNK_ID)
+-		return NULL;
++	/* Now find an object value that has not already been taken
++	 * by scanning the list.
++	 */
+ 
+-	/* First check we're tall enough (ie enough topLevel) */
++	int found = 0;
++	struct ylist_head *i;
+ 
+-	i = chunkId >> YAFFS_TNODES_LEVEL0_BITS;
+-	requiredTallness = 0;
+-	while (i) {
+-		i >>= YAFFS_TNODES_INTERNAL_BITS;
+-		requiredTallness++;
+-	}
++	__u32 n = (__u32) bucket;
+ 
+-	if (requiredTallness > fStruct->topLevel)
+-		return NULL; /* Not tall enough, so we can't find it */
++	/* yaffs_check_obj_hash_sane();  */
+ 
+-	/* Traverse down to level 0 */
+-	while (level > 0 && tn) {
+-		tn = tn->internal[(chunkId >>
+-			(YAFFS_TNODES_LEVEL0_BITS +
+-				(level - 1) *
+-				YAFFS_TNODES_INTERNAL_BITS)) &
+-			YAFFS_TNODES_INTERNAL_MASK];
+-		level--;
++	while (!found) {
++		found = 1;
++		n += YAFFS_NOBJECT_BUCKETS;
++		if (1 || dev->obj_bucket[bucket].count > 0) {
++			ylist_for_each(i, &dev->obj_bucket[bucket].list) {
++				/* If there is already one in the list */
++				if (i && ylist_entry(i, yaffs_obj_t,
++						hash_link)->obj_id == n) {
++					found = 0;
++				}
++			}
++		}
+ 	}
+ 
+-	return tn;
++	return n;
+ }
+ 
+-/* AddOrFindLevel0Tnode finds the level 0 tnode if it exists, otherwise first expands the tree.
+- * This happens in two steps:
+- *  1. If the tree isn't tall enough, then make it taller.
+- *  2. Scan down the tree towards the level 0 tnode adding tnodes if required.
+- *
+- * Used when modifying the tree.
+- *
+- *  If the tn argument is NULL, then a fresh tnode will be added otherwise the specified tn will
+- *  be plugged into the ttree.
+- */
+-
+-static yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device *dev,
+-					yaffs_FileStructure *fStruct,
+-					__u32 chunkId,
+-					yaffs_Tnode *passedTn)
++static void yaffs_hash_obj(yaffs_obj_t *in)
+ {
+-	int requiredTallness;
+-	int i;
+-	int l;
+-	yaffs_Tnode *tn;
+-
+-	__u32 x;
++	int bucket = yaffs_hash_fn(in->obj_id);
++	yaffs_dev_t *dev = in->my_dev;
+ 
++	ylist_add(&in->hash_link, &dev->obj_bucket[bucket].list);
++	dev->obj_bucket[bucket].count++;
++}
+ 
+-	/* Check sane level and page Id */
+-	if (fStruct->topLevel < 0 || fStruct->topLevel > YAFFS_TNODES_MAX_LEVEL)
+-		return NULL;
++yaffs_obj_t *yaffs_find_by_number(yaffs_dev_t *dev, __u32 number)
++{
++	int bucket = yaffs_hash_fn(number);
++	struct ylist_head *i;
++	yaffs_obj_t *in;
+ 
+-	if (chunkId > YAFFS_MAX_CHUNK_ID)
+-		return NULL;
++	ylist_for_each(i, &dev->obj_bucket[bucket].list) {
++		/* Look if it is in the list */
++		if (i) {
++			in = ylist_entry(i, yaffs_obj_t, hash_link);
++			if (in->obj_id == number) {
+ 
+-	/* First check we're tall enough (ie enough topLevel) */
++				/* Don't tell the VFS about this one if it is defered free */
++				if (in->defered_free)
++					return NULL;
+ 
+-	x = chunkId >> YAFFS_TNODES_LEVEL0_BITS;
+-	requiredTallness = 0;
+-	while (x) {
+-		x >>= YAFFS_TNODES_INTERNAL_BITS;
+-		requiredTallness++;
++				return in;
++			}
++		}
+ 	}
+ 
++	return NULL;
++}
+ 
+-	if (requiredTallness > fStruct->topLevel) {
+-		/* Not tall enough, gotta make the tree taller */
+-		for (i = fStruct->topLevel; i < requiredTallness; i++) {
++yaffs_obj_t *yaffs_new_obj(yaffs_dev_t *dev, int number,
++				    yaffs_obj_type type)
++{
++	yaffs_obj_t *theObject=NULL;
++	yaffs_tnode_t *tn = NULL;
+ 
+-			tn = yaffs_GetTnode(dev);
++	if (number < 0)
++		number = yaffs_new_obj_id(dev);
+ 
+-			if (tn) {
+-				tn->internal[0] = fStruct->top;
+-				fStruct->top = tn;
+-			} else {
+-				T(YAFFS_TRACE_ERROR,
+-				  (TSTR("yaffs: no more tnodes" TENDSTR)));
+-			}
+-		}
++	if (type == YAFFS_OBJECT_TYPE_FILE) {
++		tn = yaffs_get_tnode(dev);
++		if (!tn)
++			return NULL;
++	}
+ 
+-		fStruct->topLevel = requiredTallness;
++	theObject = yaffs_alloc_empty_obj(dev);
++	if (!theObject){
++		if(tn)
++			yaffs_free_tnode(dev,tn);
++		return NULL;
+ 	}
+ 
+-	/* Traverse down to level 0, adding anything we need */
+ 
+-	l = fStruct->topLevel;
+-	tn = fStruct->top;
++	if (theObject) {
++		theObject->fake = 0;
++		theObject->rename_allowed = 1;
++		theObject->unlink_allowed = 1;
++		theObject->obj_id = number;
++		yaffs_hash_obj(theObject);
++		theObject->variant_type = type;
++#ifdef CONFIG_YAFFS_WINCE
++		yfsd_win_file_time_now(theObject->win_atime);
++		theObject->win_ctime[0] = theObject->win_mtime[0] =
++		    theObject->win_atime[0];
++		theObject->win_ctime[1] = theObject->win_mtime[1] =
++		    theObject->win_atime[1];
++
++#else
+ 
+-	if (l > 0) {
+-		while (l > 0 && tn) {
+-			x = (chunkId >>
+-			     (YAFFS_TNODES_LEVEL0_BITS +
+-			      (l - 1) * YAFFS_TNODES_INTERNAL_BITS)) &
+-			    YAFFS_TNODES_INTERNAL_MASK;
++		theObject->yst_atime = theObject->yst_mtime =
++		    theObject->yst_ctime = Y_CURRENT_TIME;
++#endif
++		switch (type) {
++		case YAFFS_OBJECT_TYPE_FILE:
++			theObject->variant.file_variant.file_size = 0;
++			theObject->variant.file_variant.scanned_size = 0;
++			theObject->variant.file_variant.shrink_size = 0xFFFFFFFF;	/* max __u32 */
++			theObject->variant.file_variant.top_level = 0;
++			theObject->variant.file_variant.top = tn;
++			break;
++		case YAFFS_OBJECT_TYPE_DIRECTORY:
++			YINIT_LIST_HEAD(&theObject->variant.dir_variant.
++					children);
++			YINIT_LIST_HEAD(&theObject->variant.dir_variant.
++					dirty);
++			break;
++		case YAFFS_OBJECT_TYPE_SYMLINK:
++		case YAFFS_OBJECT_TYPE_HARDLINK:
++		case YAFFS_OBJECT_TYPE_SPECIAL:
++			/* No action required */
++			break;
++		case YAFFS_OBJECT_TYPE_UNKNOWN:
++			/* todo this should not happen */
++			break;
++		}
++	}
+ 
++	return theObject;
++}
+ 
+-			if ((l > 1) && !tn->internal[x]) {
+-				/* Add missing non-level-zero tnode */
+-				tn->internal[x] = yaffs_GetTnode(dev);
++yaffs_obj_t *yaffs_find_or_create_by_number(yaffs_dev_t *dev,
++						int number,
++						yaffs_obj_type type)
++{
++	yaffs_obj_t *theObject = NULL;
+ 
+-			} else if (l == 1) {
+-				/* Looking from level 1 at level 0 */
+-				if (passedTn) {
+-					/* If we already have one, then release it.*/
+-					if (tn->internal[x])
+-						yaffs_FreeTnode(dev, tn->internal[x]);
+-					tn->internal[x] = passedTn;
++	if (number > 0)
++		theObject = yaffs_find_by_number(dev, number);
+ 
+-				} else if (!tn->internal[x]) {
+-					/* Don't have one, none passed in */
+-					tn->internal[x] = yaffs_GetTnode(dev);
+-				}
+-			}
++	if (!theObject)
++		theObject = yaffs_new_obj(dev, number, type);
+ 
+-			tn = tn->internal[x];
+-			l--;
+-		}
+-	} else {
+-		/* top is level 0 */
+-		if (passedTn) {
+-			memcpy(tn, passedTn, (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8);
+-			yaffs_FreeTnode(dev, passedTn);
+-		}
+-	}
++	return theObject;
+ 
+-	return tn;
+ }
+ 
+-static int yaffs_FindChunkInGroup(yaffs_Device *dev, int theChunk,
+-				yaffs_ExtendedTags *tags, int objectId,
+-				int chunkInInode)
++
++YCHAR *yaffs_clone_str(const YCHAR *str)
+ {
+-	int j;
++	YCHAR *newStr = NULL;
++	int len;
+ 
+-	for (j = 0; theChunk && j < dev->chunkGroupSize; j++) {
+-		if (yaffs_CheckChunkBit(dev, theChunk / dev->nChunksPerBlock,
+-				theChunk % dev->nChunksPerBlock)) {
+-			yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL,
+-							tags);
+-			if (yaffs_TagsMatch(tags, objectId, chunkInInode)) {
+-				/* found it; */
+-				return theChunk;
+-			}
+-		}
+-		theChunk++;
++	if (!str)
++		str = _Y("");
++
++	len = yaffs_strnlen(str,YAFFS_MAX_ALIAS_LENGTH);
++	newStr = YMALLOC((len + 1) * sizeof(YCHAR));
++	if (newStr){
++		yaffs_strncpy(newStr, str,len);
++		newStr[len] = 0;
+ 	}
+-	return -1;
+-}
++	return newStr;
+ 
++}
+ 
+-/* DeleteWorker scans backwards through the tnode tree and deletes all the
+- * chunks and tnodes in the file
+- * Returns 1 if the tree was deleted.
+- * Returns 0 if it stopped early due to hitting the limit and the delete is incomplete.
++/*
++ * Mknod (create) a new object.
++ * equiv_obj only has meaning for a hard link;
++ * aliasString only has meaning for a symlink.
++ * rdev only has meaning for devices (a subset of special objects)
+  */
+ 
+-static int yaffs_DeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level,
+-			      int chunkOffset, int *limit)
++static yaffs_obj_t *yaffs_create_obj(yaffs_obj_type type,
++				       yaffs_obj_t *parent,
++				       const YCHAR *name,
++				       __u32 mode,
++				       __u32 uid,
++				       __u32 gid,
++				       yaffs_obj_t *equiv_obj,
++				       const YCHAR *aliasString, __u32 rdev)
+ {
+-	int i;
+-	int chunkInInode;
+-	int theChunk;
+-	yaffs_ExtendedTags tags;
+-	int foundChunk;
+-	yaffs_Device *dev = in->myDev;
+-
+-	int allDone = 1;
+-
+-	if (tn) {
+-		if (level > 0) {
+-			for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0;
+-			     i--) {
+-				if (tn->internal[i]) {
+-					if (limit && (*limit) < 0) {
+-						allDone = 0;
+-					} else {
+-						allDone =
+-							yaffs_DeleteWorker(in,
+-								tn->
+-								internal
+-								[i],
+-								level -
+-								1,
+-								(chunkOffset
+-									<<
+-									YAFFS_TNODES_INTERNAL_BITS)
+-								+ i,
+-								limit);
+-					}
+-					if (allDone) {
+-						yaffs_FreeTnode(dev,
+-								tn->
+-								internal[i]);
+-						tn->internal[i] = NULL;
+-					}
+-				}
+-			}
+-			return (allDone) ? 1 : 0;
+-		} else if (level == 0) {
+-			int hitLimit = 0;
+-
+-			for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0 && !hitLimit;
+-					i--) {
+-				theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
+-				if (theChunk) {
+-
+-					chunkInInode = (chunkOffset <<
+-						YAFFS_TNODES_LEVEL0_BITS) + i;
+-
+-					foundChunk =
+-						yaffs_FindChunkInGroup(dev,
+-								theChunk,
+-								&tags,
+-								in->objectId,
+-								chunkInInode);
+-
+-					if (foundChunk > 0) {
+-						yaffs_DeleteChunk(dev,
+-								  foundChunk, 1,
+-								  __LINE__);
+-						in->nDataChunks--;
+-						if (limit) {
+-							*limit = *limit - 1;
+-							if (*limit <= 0)
+-								hitLimit = 1;
+-						}
+-
+-					}
+-
+-					yaffs_PutLevel0Tnode(dev, tn, i, 0);
+-				}
+-
+-			}
+-			return (i < 0) ? 1 : 0;
+-
+-		}
+-
+-	}
+-
+-	return 1;
+-
+-}
+-
+-static void yaffs_SoftDeleteChunk(yaffs_Device *dev, int chunk)
+-{
+-	yaffs_BlockInfo *theBlock;
+-
+-	T(YAFFS_TRACE_DELETION, (TSTR("soft delete chunk %d" TENDSTR), chunk));
+-
+-	theBlock = yaffs_GetBlockInfo(dev, chunk / dev->nChunksPerBlock);
+-	if (theBlock) {
+-		theBlock->softDeletions++;
+-		dev->nFreeChunks++;
+-	}
+-}
+-
+-/* SoftDeleteWorker scans backwards through the tnode tree and soft deletes all the chunks in the file.
+- * All soft deleting does is increment the block's softdelete count and pulls the chunk out
+- * of the tnode.
+- * Thus, essentially this is the same as DeleteWorker except that the chunks are soft deleted.
+- */
+-
+-static int yaffs_SoftDeleteWorker(yaffs_Object *in, yaffs_Tnode *tn,
+-				  __u32 level, int chunkOffset)
+-{
+-	int i;
+-	int theChunk;
+-	int allDone = 1;
+-	yaffs_Device *dev = in->myDev;
+-
+-	if (tn) {
+-		if (level > 0) {
+-
+-			for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0;
+-			     i--) {
+-				if (tn->internal[i]) {
+-					allDone =
+-					    yaffs_SoftDeleteWorker(in,
+-								   tn->
+-								   internal[i],
+-								   level - 1,
+-								   (chunkOffset
+-								    <<
+-								    YAFFS_TNODES_INTERNAL_BITS)
+-								   + i);
+-					if (allDone) {
+-						yaffs_FreeTnode(dev,
+-								tn->
+-								internal[i]);
+-						tn->internal[i] = NULL;
+-					} else {
+-						/* Hoosterman... how could this happen? */
+-					}
+-				}
+-			}
+-			return (allDone) ? 1 : 0;
+-		} else if (level == 0) {
+-
+-			for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0; i--) {
+-				theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
+-				if (theChunk) {
+-					/* Note this does not find the real chunk, only the chunk group.
+-					 * We make an assumption that a chunk group is not larger than
+-					 * a block.
+-					 */
+-					yaffs_SoftDeleteChunk(dev, theChunk);
+-					yaffs_PutLevel0Tnode(dev, tn, i, 0);
+-				}
+-
+-			}
+-			return 1;
+-
+-		}
+-
+-	}
+-
+-	return 1;
+-
+-}
+-
+-static void yaffs_SoftDeleteFile(yaffs_Object *obj)
+-{
+-	if (obj->deleted &&
+-	    obj->variantType == YAFFS_OBJECT_TYPE_FILE && !obj->softDeleted) {
+-		if (obj->nDataChunks <= 0) {
+-			/* Empty file with no duplicate object headers, just delete it immediately */
+-			yaffs_FreeTnode(obj->myDev,
+-					obj->variant.fileVariant.top);
+-			obj->variant.fileVariant.top = NULL;
+-			T(YAFFS_TRACE_TRACING,
+-			  (TSTR("yaffs: Deleting empty file %d" TENDSTR),
+-			   obj->objectId));
+-			yaffs_DoGenericObjectDeletion(obj);
+-		} else {
+-			yaffs_SoftDeleteWorker(obj,
+-					       obj->variant.fileVariant.top,
+-					       obj->variant.fileVariant.
+-					       topLevel, 0);
+-			obj->softDeleted = 1;
+-		}
+-	}
+-}
+-
+-/* Pruning removes any part of the file structure tree that is beyond the
+- * bounds of the file (ie that does not point to chunks).
+- *
+- * A file should only get pruned when its size is reduced.
+- *
+- * Before pruning, the chunks must be pulled from the tree and the
+- * level 0 tnode entries must be zeroed out.
+- * Could also use this for file deletion, but that's probably better handled
+- * by a special case.
+- */
+-
+-static yaffs_Tnode *yaffs_PruneWorker(yaffs_Device *dev, yaffs_Tnode *tn,
+-				__u32 level, int del0)
+-{
+-	int i;
+-	int hasData;
+-
+-	if (tn) {
+-		hasData = 0;
+-
+-		for (i = 0; i < YAFFS_NTNODES_INTERNAL; i++) {
+-			if (tn->internal[i] && level > 0) {
+-				tn->internal[i] =
+-				    yaffs_PruneWorker(dev, tn->internal[i],
+-						      level - 1,
+-						      (i == 0) ? del0 : 1);
+-			}
+-
+-			if (tn->internal[i])
+-				hasData++;
+-		}
+-
+-		if (hasData == 0 && del0) {
+-			/* Free and return NULL */
+-
+-			yaffs_FreeTnode(dev, tn);
+-			tn = NULL;
+-		}
+-
+-	}
+-
+-	return tn;
+-
+-}
+-
+-static int yaffs_PruneFileStructure(yaffs_Device *dev,
+-				yaffs_FileStructure *fStruct)
+-{
+-	int i;
+-	int hasData;
+-	int done = 0;
+-	yaffs_Tnode *tn;
+-
+-	if (fStruct->topLevel > 0) {
+-		fStruct->top =
+-		    yaffs_PruneWorker(dev, fStruct->top, fStruct->topLevel, 0);
+-
+-		/* Now we have a tree with all the non-zero branches NULL but the height
+-		 * is the same as it was.
+-		 * Let's see if we can trim internal tnodes to shorten the tree.
+-		 * We can do this if only the 0th element in the tnode is in use
+-		 * (ie all the non-zero are NULL)
+-		 */
+-
+-		while (fStruct->topLevel && !done) {
+-			tn = fStruct->top;
+-
+-			hasData = 0;
+-			for (i = 1; i < YAFFS_NTNODES_INTERNAL; i++) {
+-				if (tn->internal[i])
+-					hasData++;
+-			}
+-
+-			if (!hasData) {
+-				fStruct->top = tn->internal[0];
+-				fStruct->topLevel--;
+-				yaffs_FreeTnode(dev, tn);
+-			} else {
+-				done = 1;
+-			}
+-		}
+-	}
+-
+-	return YAFFS_OK;
+-}
+-
+-/*-------------------- End of File Structure functions.-------------------*/
+-
+-/* yaffs_CreateFreeObjects creates a bunch more objects and
+- * adds them to the object free list.
+- */
+-static int yaffs_CreateFreeObjects(yaffs_Device *dev, int nObjects)
+-{
+-	int i;
+-	yaffs_Object *newObjects;
+-	yaffs_ObjectList *list;
+-
+-	if (nObjects < 1)
+-		return YAFFS_OK;
+-
+-	/* make these things */
+-	newObjects = YMALLOC(nObjects * sizeof(yaffs_Object));
+-	list = YMALLOC(sizeof(yaffs_ObjectList));
+-
+-	if (!newObjects || !list) {
+-		if (newObjects)
+-			YFREE(newObjects);
+-		if (list)
+-			YFREE(list);
+-		T(YAFFS_TRACE_ALLOCATE,
+-		  (TSTR("yaffs: Could not allocate more objects" TENDSTR)));
+-		return YAFFS_FAIL;
+-	}
+-
+-	/* Hook them into the free list */
+-	for (i = 0; i < nObjects - 1; i++) {
+-		newObjects[i].siblings.next =
+-				(struct ylist_head *)(&newObjects[i + 1]);
+-	}
+-
+-	newObjects[nObjects - 1].siblings.next = (void *)dev->freeObjects;
+-	dev->freeObjects = newObjects;
+-	dev->nFreeObjects += nObjects;
+-	dev->nObjectsCreated += nObjects;
+-
+-	/* Now add this bunch of Objects to a list for freeing up. */
+-
+-	list->objects = newObjects;
+-	list->next = dev->allocatedObjectList;
+-	dev->allocatedObjectList = list;
+-
+-	return YAFFS_OK;
+-}
+-
+-
+-/* AllocateEmptyObject gets us a clean Object. Tries to make allocate more if we run out */
+-static yaffs_Object *yaffs_AllocateEmptyObject(yaffs_Device *dev)
+-{
+-	yaffs_Object *tn = NULL;
+-
+-#ifdef VALGRIND_TEST
+-	tn = YMALLOC(sizeof(yaffs_Object));
+-#else
+-	/* If there are none left make more */
+-	if (!dev->freeObjects)
+-		yaffs_CreateFreeObjects(dev, YAFFS_ALLOCATION_NOBJECTS);
+-
+-	if (dev->freeObjects) {
+-		tn = dev->freeObjects;
+-		dev->freeObjects =
+-			(yaffs_Object *) (dev->freeObjects->siblings.next);
+-		dev->nFreeObjects--;
+-	}
+-#endif
+-	if (tn) {
+-		/* Now sweeten it up... */
+-
+-		memset(tn, 0, sizeof(yaffs_Object));
+-		tn->beingCreated = 1;
+-
+-		tn->myDev = dev;
+-		tn->hdrChunk = 0;
+-		tn->variantType = YAFFS_OBJECT_TYPE_UNKNOWN;
+-		YINIT_LIST_HEAD(&(tn->hardLinks));
+-		YINIT_LIST_HEAD(&(tn->hashLink));
+-		YINIT_LIST_HEAD(&tn->siblings);
+-
+-
+-		/* Now make the directory sane */
+-		if (dev->rootDir) {
+-			tn->parent = dev->rootDir;
+-			ylist_add(&(tn->siblings), &dev->rootDir->variant.directoryVariant.children);
+-		}
+-
+-		/* Add it to the lost and found directory.
+-		 * NB Can't put root or lostNFound in lostNFound so
+-		 * check if lostNFound exists first
+-		 */
+-		if (dev->lostNFoundDir)
+-			yaffs_AddObjectToDirectory(dev->lostNFoundDir, tn);
+-
+-		tn->beingCreated = 0;
+-	}
+-
+-	dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
+-
+-	return tn;
+-}
+-
+-static yaffs_Object *yaffs_CreateFakeDirectory(yaffs_Device *dev, int number,
+-					       __u32 mode)
+-{
+-
+-	yaffs_Object *obj =
+-	    yaffs_CreateNewObject(dev, number, YAFFS_OBJECT_TYPE_DIRECTORY);
+-	if (obj) {
+-		obj->fake = 1;		/* it is fake so it might have no NAND presence... */
+-		obj->renameAllowed = 0;	/* ... and we're not allowed to rename it... */
+-		obj->unlinkAllowed = 0;	/* ... or unlink it */
+-		obj->deleted = 0;
+-		obj->unlinked = 0;
+-		obj->yst_mode = mode;
+-		obj->myDev = dev;
+-		obj->hdrChunk = 0;	/* Not a valid chunk. */
+-	}
+-
+-	return obj;
+-
+-}
+-
+-static void yaffs_UnhashObject(yaffs_Object *tn)
+-{
+-	int bucket;
+-	yaffs_Device *dev = tn->myDev;
+-
+-	/* If it is still linked into the bucket list, free from the list */
+-	if (!ylist_empty(&tn->hashLink)) {
+-		ylist_del_init(&tn->hashLink);
+-		bucket = yaffs_HashFunction(tn->objectId);
+-		dev->objectBucket[bucket].count--;
+-	}
+-}
+-
+-/*  FreeObject frees up a Object and puts it back on the free list */
+-static void yaffs_FreeObject(yaffs_Object *tn)
+-{
+-	yaffs_Device *dev = tn->myDev;
+-
+-#ifdef __KERNEL__
+-	T(YAFFS_TRACE_OS, (TSTR("FreeObject %p inode %p"TENDSTR), tn, tn->myInode));
+-#endif
+-
+-	if (tn->parent)
+-		YBUG();
+-	if (!ylist_empty(&tn->siblings))
+-		YBUG();
+-
+-
+-#ifdef __KERNEL__
+-	if (tn->myInode) {
+-		/* We're still hooked up to a cached inode.
+-		 * Don't delete now, but mark for later deletion
+-		 */
+-		tn->deferedFree = 1;
+-		return;
+-	}
+-#endif
+-
+-	yaffs_UnhashObject(tn);
+-
+-#ifdef VALGRIND_TEST
+-	YFREE(tn);
+-#else
+-	/* Link into the free list. */
+-	tn->siblings.next = (struct ylist_head *)(dev->freeObjects);
+-	dev->freeObjects = tn;
+-	dev->nFreeObjects++;
+-#endif
+-	dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
+-}
+-
+-#ifdef __KERNEL__
+-
+-void yaffs_HandleDeferedFree(yaffs_Object *obj)
+-{
+-	if (obj->deferedFree)
+-		yaffs_FreeObject(obj);
+-}
+-
+-#endif
+-
+-static void yaffs_DeinitialiseObjects(yaffs_Device *dev)
+-{
+-	/* Free the list of allocated Objects */
+-
+-	yaffs_ObjectList *tmp;
+-
+-	while (dev->allocatedObjectList) {
+-		tmp = dev->allocatedObjectList->next;
+-		YFREE(dev->allocatedObjectList->objects);
+-		YFREE(dev->allocatedObjectList);
+-
+-		dev->allocatedObjectList = tmp;
+-	}
+-
+-	dev->freeObjects = NULL;
+-	dev->nFreeObjects = 0;
+-}
+-
+-static void yaffs_InitialiseObjects(yaffs_Device *dev)
+-{
+-	int i;
+-
+-	dev->allocatedObjectList = NULL;
+-	dev->freeObjects = NULL;
+-	dev->nFreeObjects = 0;
+-
+-	for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
+-		YINIT_LIST_HEAD(&dev->objectBucket[i].list);
+-		dev->objectBucket[i].count = 0;
+-	}
+-}
+-
+-static int yaffs_FindNiceObjectBucket(yaffs_Device *dev)
+-{
+-	static int x;
+-	int i;
+-	int l = 999;
+-	int lowest = 999999;
+-
+-	/* First let's see if we can find one that's empty. */
+-
+-	for (i = 0; i < 10 && lowest > 0; i++) {
+-		x++;
+-		x %= YAFFS_NOBJECT_BUCKETS;
+-		if (dev->objectBucket[x].count < lowest) {
+-			lowest = dev->objectBucket[x].count;
+-			l = x;
+-		}
+-
+-	}
+-
+-	/* If we didn't find an empty list, then try
+-	 * looking a bit further for a short one
+-	 */
+-
+-	for (i = 0; i < 10 && lowest > 3; i++) {
+-		x++;
+-		x %= YAFFS_NOBJECT_BUCKETS;
+-		if (dev->objectBucket[x].count < lowest) {
+-			lowest = dev->objectBucket[x].count;
+-			l = x;
+-		}
+-
+-	}
+-
+-	return l;
+-}
+-
+-static int yaffs_CreateNewObjectNumber(yaffs_Device *dev)
+-{
+-	int bucket = yaffs_FindNiceObjectBucket(dev);
+-
+-	/* Now find an object value that has not already been taken
+-	 * by scanning the list.
+-	 */
+-
+-	int found = 0;
+-	struct ylist_head *i;
+-
+-	__u32 n = (__u32) bucket;
+-
+-	/* yaffs_CheckObjectHashSanity();  */
+-
+-	while (!found) {
+-		found = 1;
+-		n += YAFFS_NOBJECT_BUCKETS;
+-		if (1 || dev->objectBucket[bucket].count > 0) {
+-			ylist_for_each(i, &dev->objectBucket[bucket].list) {
+-				/* If there is already one in the list */
+-				if (i && ylist_entry(i, yaffs_Object,
+-						hashLink)->objectId == n) {
+-					found = 0;
+-				}
+-			}
+-		}
+-	}
+-
+-	return n;
+-}
+-
+-static void yaffs_HashObject(yaffs_Object *in)
+-{
+-	int bucket = yaffs_HashFunction(in->objectId);
+-	yaffs_Device *dev = in->myDev;
+-
+-	ylist_add(&in->hashLink, &dev->objectBucket[bucket].list);
+-	dev->objectBucket[bucket].count++;
+-}
+-
+-yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device *dev, __u32 number)
+-{
+-	int bucket = yaffs_HashFunction(number);
+-	struct ylist_head *i;
+-	yaffs_Object *in;
+-
+-	ylist_for_each(i, &dev->objectBucket[bucket].list) {
+-		/* Look if it is in the list */
+-		if (i) {
+-			in = ylist_entry(i, yaffs_Object, hashLink);
+-			if (in->objectId == number) {
+-#ifdef __KERNEL__
+-				/* Don't tell the VFS about this one if it is defered free */
+-				if (in->deferedFree)
+-					return NULL;
+-#endif
+-
+-				return in;
+-			}
+-		}
+-	}
+-
+-	return NULL;
+-}
+-
+-yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev, int number,
+-				    yaffs_ObjectType type)
+-{
+-	yaffs_Object *theObject;
+-	yaffs_Tnode *tn = NULL;
+-
+-	if (number < 0)
+-		number = yaffs_CreateNewObjectNumber(dev);
+-
+-	theObject = yaffs_AllocateEmptyObject(dev);
+-	if (!theObject)
+-		return NULL;
+-
+-	if (type == YAFFS_OBJECT_TYPE_FILE) {
+-		tn = yaffs_GetTnode(dev);
+-		if (!tn) {
+-			yaffs_FreeObject(theObject);
+-			return NULL;
+-		}
+-	}
+-
+-	if (theObject) {
+-		theObject->fake = 0;
+-		theObject->renameAllowed = 1;
+-		theObject->unlinkAllowed = 1;
+-		theObject->objectId = number;
+-		yaffs_HashObject(theObject);
+-		theObject->variantType = type;
+-#ifdef CONFIG_YAFFS_WINCE
+-		yfsd_WinFileTimeNow(theObject->win_atime);
+-		theObject->win_ctime[0] = theObject->win_mtime[0] =
+-		    theObject->win_atime[0];
+-		theObject->win_ctime[1] = theObject->win_mtime[1] =
+-		    theObject->win_atime[1];
+-
+-#else
+-
+-		theObject->yst_atime = theObject->yst_mtime =
+-		    theObject->yst_ctime = Y_CURRENT_TIME;
+-#endif
+-		switch (type) {
+-		case YAFFS_OBJECT_TYPE_FILE:
+-			theObject->variant.fileVariant.fileSize = 0;
+-			theObject->variant.fileVariant.scannedFileSize = 0;
+-			theObject->variant.fileVariant.shrinkSize = 0xFFFFFFFF;	/* max __u32 */
+-			theObject->variant.fileVariant.topLevel = 0;
+-			theObject->variant.fileVariant.top = tn;
+-			break;
+-		case YAFFS_OBJECT_TYPE_DIRECTORY:
+-			YINIT_LIST_HEAD(&theObject->variant.directoryVariant.
+-					children);
+-			break;
+-		case YAFFS_OBJECT_TYPE_SYMLINK:
+-		case YAFFS_OBJECT_TYPE_HARDLINK:
+-		case YAFFS_OBJECT_TYPE_SPECIAL:
+-			/* No action required */
+-			break;
+-		case YAFFS_OBJECT_TYPE_UNKNOWN:
+-			/* todo this should not happen */
+-			break;
+-		}
+-	}
+-
+-	return theObject;
+-}
+-
+-static yaffs_Object *yaffs_FindOrCreateObjectByNumber(yaffs_Device *dev,
+-						      int number,
+-						      yaffs_ObjectType type)
+-{
+-	yaffs_Object *theObject = NULL;
+-
+-	if (number > 0)
+-		theObject = yaffs_FindObjectByNumber(dev, number);
+-
+-	if (!theObject)
+-		theObject = yaffs_CreateNewObject(dev, number, type);
+-
+-	return theObject;
+-
+-}
+-
+-
+-static YCHAR *yaffs_CloneString(const YCHAR *str)
+-{
+-	YCHAR *newStr = NULL;
+-
+-	if (str && *str) {
+-		newStr = YMALLOC((yaffs_strlen(str) + 1) * sizeof(YCHAR));
+-		if (newStr)
+-			yaffs_strcpy(newStr, str);
+-	}
+-
+-	return newStr;
+-
+-}
+-
+-/*
+- * Mknod (create) a new object.
+- * equivalentObject only has meaning for a hard link;
+- * aliasString only has meaning for a sumlink.
+- * rdev only has meaning for devices (a subset of special objects)
+- */
+-
+-static yaffs_Object *yaffs_MknodObject(yaffs_ObjectType type,
+-				       yaffs_Object *parent,
+-				       const YCHAR *name,
+-				       __u32 mode,
+-				       __u32 uid,
+-				       __u32 gid,
+-				       yaffs_Object *equivalentObject,
+-				       const YCHAR *aliasString, __u32 rdev)
+-{
+-	yaffs_Object *in;
+-	YCHAR *str = NULL;
+-
+-	yaffs_Device *dev = parent->myDev;
+-
+-	/* Check if the entry exists. If it does then fail the call since we don't want a dup.*/
+-	if (yaffs_FindObjectByName(parent, name))
+-		return NULL;
+-
+-	in = yaffs_CreateNewObject(dev, -1, type);
+-
+-	if (!in)
+-		return YAFFS_FAIL;
+-
+-	if (type == YAFFS_OBJECT_TYPE_SYMLINK) {
+-		str = yaffs_CloneString(aliasString);
+-		if (!str) {
+-			yaffs_FreeObject(in);
+-			return NULL;
+-		}
+-	}
+-
+-
+-
+-	if (in) {
+-		in->hdrChunk = 0;
+-		in->valid = 1;
+-		in->variantType = type;
+-
+-		in->yst_mode = mode;
+-
+-#ifdef CONFIG_YAFFS_WINCE
+-		yfsd_WinFileTimeNow(in->win_atime);
+-		in->win_ctime[0] = in->win_mtime[0] = in->win_atime[0];
+-		in->win_ctime[1] = in->win_mtime[1] = in->win_atime[1];
+-
+-#else
+-		in->yst_atime = in->yst_mtime = in->yst_ctime = Y_CURRENT_TIME;
+-
+-		in->yst_rdev = rdev;
+-		in->yst_uid = uid;
+-		in->yst_gid = gid;
+-#endif
+-		in->nDataChunks = 0;
+-
+-		yaffs_SetObjectName(in, name);
+-		in->dirty = 1;
+-
+-		yaffs_AddObjectToDirectory(parent, in);
+-
+-		in->myDev = parent->myDev;
+-
+-		switch (type) {
+-		case YAFFS_OBJECT_TYPE_SYMLINK:
+-			in->variant.symLinkVariant.alias = str;
+-			break;
+-		case YAFFS_OBJECT_TYPE_HARDLINK:
+-			in->variant.hardLinkVariant.equivalentObject =
+-				equivalentObject;
+-			in->variant.hardLinkVariant.equivalentObjectId =
+-				equivalentObject->objectId;
+-			ylist_add(&in->hardLinks, &equivalentObject->hardLinks);
+-			break;
+-		case YAFFS_OBJECT_TYPE_FILE:
+-		case YAFFS_OBJECT_TYPE_DIRECTORY:
+-		case YAFFS_OBJECT_TYPE_SPECIAL:
+-		case YAFFS_OBJECT_TYPE_UNKNOWN:
+-			/* do nothing */
+-			break;
+-		}
+-
+-		if (yaffs_UpdateObjectHeader(in, name, 0, 0, 0) < 0) {
+-			/* Could not create the object header, fail the creation */
+-			yaffs_DeleteObject(in);
+-			in = NULL;
+-		}
+-
+-	}
+-
+-	return in;
+-}
+-
+-yaffs_Object *yaffs_MknodFile(yaffs_Object *parent, const YCHAR *name,
+-			__u32 mode, __u32 uid, __u32 gid)
+-{
+-	return yaffs_MknodObject(YAFFS_OBJECT_TYPE_FILE, parent, name, mode,
+-				uid, gid, NULL, NULL, 0);
+-}
+-
+-yaffs_Object *yaffs_MknodDirectory(yaffs_Object *parent, const YCHAR *name,
+-				__u32 mode, __u32 uid, __u32 gid)
+-{
+-	return yaffs_MknodObject(YAFFS_OBJECT_TYPE_DIRECTORY, parent, name,
+-				 mode, uid, gid, NULL, NULL, 0);
+-}
+-
+-yaffs_Object *yaffs_MknodSpecial(yaffs_Object *parent, const YCHAR *name,
+-				__u32 mode, __u32 uid, __u32 gid, __u32 rdev)
+-{
+-	return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SPECIAL, parent, name, mode,
+-				 uid, gid, NULL, NULL, rdev);
+-}
+-
+-yaffs_Object *yaffs_MknodSymLink(yaffs_Object *parent, const YCHAR *name,
+-				__u32 mode, __u32 uid, __u32 gid,
+-				const YCHAR *alias)
+-{
+-	return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SYMLINK, parent, name, mode,
+-				uid, gid, NULL, alias, 0);
+-}
+-
+-/* yaffs_Link returns the object id of the equivalent object.*/
+-yaffs_Object *yaffs_Link(yaffs_Object *parent, const YCHAR *name,
+-			yaffs_Object *equivalentObject)
+-{
+-	/* Get the real object in case we were fed a hard link as an equivalent object */
+-	equivalentObject = yaffs_GetEquivalentObject(equivalentObject);
+-
+-	if (yaffs_MknodObject
+-	    (YAFFS_OBJECT_TYPE_HARDLINK, parent, name, 0, 0, 0,
+-	     equivalentObject, NULL, 0)) {
+-		return equivalentObject;
+-	} else {
+-		return NULL;
+-	}
+-
+-}
+-
+-static int yaffs_ChangeObjectName(yaffs_Object *obj, yaffs_Object *newDir,
+-				const YCHAR *newName, int force, int shadows)
+-{
+-	int unlinkOp;
+-	int deleteOp;
+-
+-	yaffs_Object *existingTarget;
+-
+-	if (newDir == NULL)
+-		newDir = obj->parent;	/* use the old directory */
+-
+-	if (newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
+-		T(YAFFS_TRACE_ALWAYS,
+-		  (TSTR
+-		   ("tragedy: yaffs_ChangeObjectName: newDir is not a directory"
+-		    TENDSTR)));
+-		YBUG();
+-	}
+-
+-	/* TODO: Do we need this different handling for YAFFS2 and YAFFS1?? */
+-	if (obj->myDev->isYaffs2)
+-		unlinkOp = (newDir == obj->myDev->unlinkedDir);
+-	else
+-		unlinkOp = (newDir == obj->myDev->unlinkedDir
+-			    && obj->variantType == YAFFS_OBJECT_TYPE_FILE);
+-
+-	deleteOp = (newDir == obj->myDev->deletedDir);
+-
+-	existingTarget = yaffs_FindObjectByName(newDir, newName);
+-
+-	/* If the object is a file going into the unlinked directory,
+-	 *   then it is OK to just stuff it in since duplicate names are allowed.
+-	 *   else only proceed if the new name does not exist and if we're putting
+-	 *   it into a directory.
+-	 */
+-	if ((unlinkOp ||
+-	     deleteOp ||
+-	     force ||
+-	     (shadows > 0) ||
+-	     !existingTarget) &&
+-	    newDir->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) {
+-		yaffs_SetObjectName(obj, newName);
+-		obj->dirty = 1;
+-
+-		yaffs_AddObjectToDirectory(newDir, obj);
+-
+-		if (unlinkOp)
+-			obj->unlinked = 1;
+-
+-		/* If it is a deletion then we mark it as a shrink for gc purposes. */
+-		if (yaffs_UpdateObjectHeader(obj, newName, 0, deleteOp, shadows) >= 0)
+-			return YAFFS_OK;
+-	}
+-
+-	return YAFFS_FAIL;
+-}
+-
+-int yaffs_RenameObject(yaffs_Object *oldDir, const YCHAR *oldName,
+-		yaffs_Object *newDir, const YCHAR *newName)
+-{
+-	yaffs_Object *obj = NULL;
+-	yaffs_Object *existingTarget = NULL;
+-	int force = 0;
+-
+-
+-	if (!oldDir || oldDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
+-		YBUG();
+-	if (!newDir || newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
+-		YBUG();
+-
+-#ifdef CONFIG_YAFFS_CASE_INSENSITIVE
+-	/* Special case for case insemsitive systems (eg. WinCE).
+-	 * While look-up is case insensitive, the name isn't.
+-	 * Therefore we might want to change x.txt to X.txt
+-	*/
+-	if (oldDir == newDir && yaffs_strcmp(oldName, newName) == 0)
+-		force = 1;
+-#endif
+-
+-	else if (yaffs_strlen(newName) > YAFFS_MAX_NAME_LENGTH)
+-		/* ENAMETOOLONG */
+-		return YAFFS_FAIL;
+-
+-	obj = yaffs_FindObjectByName(oldDir, oldName);
+-
+-	if (obj && obj->renameAllowed) {
+-
+-		/* Now do the handling for an existing target, if there is one */
+-
+-		existingTarget = yaffs_FindObjectByName(newDir, newName);
+-		if (existingTarget &&
+-			existingTarget->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
+-			!ylist_empty(&existingTarget->variant.directoryVariant.children)) {
+-			/* There is a target that is a non-empty directory, so we fail */
+-			return YAFFS_FAIL;	/* EEXIST or ENOTEMPTY */
+-		} else if (existingTarget && existingTarget != obj) {
+-			/* Nuke the target first, using shadowing,
+-			 * but only if it isn't the same object
+-			 */
+-			yaffs_ChangeObjectName(obj, newDir, newName, force,
+-						existingTarget->objectId);
+-			yaffs_UnlinkObject(existingTarget);
+-		}
+-
+-		return yaffs_ChangeObjectName(obj, newDir, newName, 1, 0);
+-	}
+-	return YAFFS_FAIL;
+-}
+-
+-/*------------------------- Block Management and Page Allocation ----------------*/
+-
+-static int yaffs_InitialiseBlocks(yaffs_Device *dev)
+-{
+-	int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
+-
+-	dev->blockInfo = NULL;
+-	dev->chunkBits = NULL;
+-
+-	dev->allocationBlock = -1;	/* force it to get a new one */
+-
+-	/* If the first allocation strategy fails, thry the alternate one */
+-	dev->blockInfo = YMALLOC(nBlocks * sizeof(yaffs_BlockInfo));
+-	if (!dev->blockInfo) {
+-		dev->blockInfo = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockInfo));
+-		dev->blockInfoAlt = 1;
+-	} else
+-		dev->blockInfoAlt = 0;
+-
+-	if (dev->blockInfo) {
+-		/* Set up dynamic blockinfo stuff. */
+-		dev->chunkBitmapStride = (dev->nChunksPerBlock + 7) / 8; /* round up bytes */
+-		dev->chunkBits = YMALLOC(dev->chunkBitmapStride * nBlocks);
+-		if (!dev->chunkBits) {
+-			dev->chunkBits = YMALLOC_ALT(dev->chunkBitmapStride * nBlocks);
+-			dev->chunkBitsAlt = 1;
+-		} else
+-			dev->chunkBitsAlt = 0;
+-	}
+-
+-	if (dev->blockInfo && dev->chunkBits) {
+-		memset(dev->blockInfo, 0, nBlocks * sizeof(yaffs_BlockInfo));
+-		memset(dev->chunkBits, 0, dev->chunkBitmapStride * nBlocks);
+-		return YAFFS_OK;
+-	}
+-
+-	return YAFFS_FAIL;
+-}
+-
+-static void yaffs_DeinitialiseBlocks(yaffs_Device *dev)
+-{
+-	if (dev->blockInfoAlt && dev->blockInfo)
+-		YFREE_ALT(dev->blockInfo);
+-	else if (dev->blockInfo)
+-		YFREE(dev->blockInfo);
+-
+-	dev->blockInfoAlt = 0;
+-
+-	dev->blockInfo = NULL;
+-
+-	if (dev->chunkBitsAlt && dev->chunkBits)
+-		YFREE_ALT(dev->chunkBits);
+-	else if (dev->chunkBits)
+-		YFREE(dev->chunkBits);
+-	dev->chunkBitsAlt = 0;
+-	dev->chunkBits = NULL;
+-}
+-
+-static int yaffs_BlockNotDisqualifiedFromGC(yaffs_Device *dev,
+-					yaffs_BlockInfo *bi)
+-{
+-	int i;
+-	__u32 seq;
+-	yaffs_BlockInfo *b;
+-
+-	if (!dev->isYaffs2)
+-		return 1;	/* disqualification only applies to yaffs2. */
+-
+-	if (!bi->hasShrinkHeader)
+-		return 1;	/* can gc */
+-
+-	/* Find the oldest dirty sequence number if we don't know it and save it
+-	 * so we don't have to keep recomputing it.
+-	 */
+-	if (!dev->oldestDirtySequence) {
+-		seq = dev->sequenceNumber;
+-
+-		for (i = dev->internalStartBlock; i <= dev->internalEndBlock;
+-				i++) {
+-			b = yaffs_GetBlockInfo(dev, i);
+-			if (b->blockState == YAFFS_BLOCK_STATE_FULL &&
+-			    (b->pagesInUse - b->softDeletions) <
+-			    dev->nChunksPerBlock && b->sequenceNumber < seq) {
+-				seq = b->sequenceNumber;
+-			}
+-		}
+-		dev->oldestDirtySequence = seq;
+-	}
+-
+-	/* Can't do gc of this block if there are any blocks older than this one that have
+-	 * discarded pages.
+-	 */
+-	return (bi->sequenceNumber <= dev->oldestDirtySequence);
+-}
+-
+-/* FindDiretiestBlock is used to select the dirtiest block (or close enough)
+- * for garbage collection.
+- */
+-
+-static int yaffs_FindBlockForGarbageCollection(yaffs_Device *dev,
+-					int aggressive)
+-{
+-	int b = dev->currentDirtyChecker;
+-
+-	int i;
+-	int iterations;
+-	int dirtiest = -1;
+-	int pagesInUse = 0;
+-	int prioritised = 0;
+-	yaffs_BlockInfo *bi;
+-	int pendingPrioritisedExist = 0;
+-
+-	/* First let's see if we need to grab a prioritised block */
+-	if (dev->hasPendingPrioritisedGCs) {
+-		for (i = dev->internalStartBlock; i < dev->internalEndBlock && !prioritised; i++) {
+-
+-			bi = yaffs_GetBlockInfo(dev, i);
+-			/* yaffs_VerifyBlock(dev,bi,i); */
+-
+-			if (bi->gcPrioritise) {
+-				pendingPrioritisedExist = 1;
+-				if (bi->blockState == YAFFS_BLOCK_STATE_FULL &&
+-				   yaffs_BlockNotDisqualifiedFromGC(dev, bi)) {
+-					pagesInUse = (bi->pagesInUse - bi->softDeletions);
+-					dirtiest = i;
+-					prioritised = 1;
+-					aggressive = 1; /* Fool the non-aggressive skip logiv below */
+-				}
+-			}
+-		}
+-
+-		if (!pendingPrioritisedExist) /* None found, so we can clear this */
+-			dev->hasPendingPrioritisedGCs = 0;
+-	}
+-
+-	/* If we're doing aggressive GC then we are happy to take a less-dirty block, and
+-	 * search harder.
+-	 * else (we're doing a leasurely gc), then we only bother to do this if the
+-	 * block has only a few pages in use.
+-	 */
+-
+-	dev->nonAggressiveSkip--;
+-
+-	if (!aggressive && (dev->nonAggressiveSkip > 0))
+-		return -1;
+-
+-	if (!prioritised)
+-		pagesInUse =
+-			(aggressive) ? dev->nChunksPerBlock : YAFFS_PASSIVE_GC_CHUNKS + 1;
+-
+-	if (aggressive)
+-		iterations =
+-		    dev->internalEndBlock - dev->internalStartBlock + 1;
+-	else {
+-		iterations =
+-		    dev->internalEndBlock - dev->internalStartBlock + 1;
+-		iterations = iterations / 16;
+-		if (iterations > 200)
+-			iterations = 200;
+-	}
+-
+-	for (i = 0; i <= iterations && pagesInUse > 0 && !prioritised; i++) {
+-		b++;
+-		if (b < dev->internalStartBlock || b > dev->internalEndBlock)
+-			b = dev->internalStartBlock;
+-
+-		if (b < dev->internalStartBlock || b > dev->internalEndBlock) {
+-			T(YAFFS_TRACE_ERROR,
+-			  (TSTR("**>> Block %d is not valid" TENDSTR), b));
+-			YBUG();
+-		}
+-
+-		bi = yaffs_GetBlockInfo(dev, b);
+-
+-		if (bi->blockState == YAFFS_BLOCK_STATE_FULL &&
+-			(bi->pagesInUse - bi->softDeletions) < pagesInUse &&
+-				yaffs_BlockNotDisqualifiedFromGC(dev, bi)) {
+-			dirtiest = b;
+-			pagesInUse = (bi->pagesInUse - bi->softDeletions);
+-		}
+-	}
+-
+-	dev->currentDirtyChecker = b;
+-
+-	if (dirtiest > 0) {
+-		T(YAFFS_TRACE_GC,
+-		  (TSTR("GC Selected block %d with %d free, prioritised:%d" TENDSTR), dirtiest,
+-		   dev->nChunksPerBlock - pagesInUse, prioritised));
+-	}
+-
+-	dev->oldestDirtySequence = 0;
+-
+-	if (dirtiest > 0)
+-		dev->nonAggressiveSkip = 4;
+-
+-	return dirtiest;
+-}
+-
+-static void yaffs_BlockBecameDirty(yaffs_Device *dev, int blockNo)
+-{
+-	yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockNo);
+-
+-	int erasedOk = 0;
+-
+-	/* If the block is still healthy erase it and mark as clean.
+-	 * If the block has had a data failure, then retire it.
+-	 */
+-
+-	T(YAFFS_TRACE_GC | YAFFS_TRACE_ERASE,
+-		(TSTR("yaffs_BlockBecameDirty block %d state %d %s"TENDSTR),
+-		blockNo, bi->blockState, (bi->needsRetiring) ? "needs retiring" : ""));
+-
+-	bi->blockState = YAFFS_BLOCK_STATE_DIRTY;
+-
+-	if (!bi->needsRetiring) {
+-		yaffs_InvalidateCheckpoint(dev);
+-		erasedOk = yaffs_EraseBlockInNAND(dev, blockNo);
+-		if (!erasedOk) {
+-			dev->nErasureFailures++;
+-			T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
+-			  (TSTR("**>> Erasure failed %d" TENDSTR), blockNo));
+-		}
+-	}
+-
+-	if (erasedOk &&
+-	    ((yaffs_traceMask & YAFFS_TRACE_ERASE) || !yaffs_SkipVerification(dev))) {
+-		int i;
+-		for (i = 0; i < dev->nChunksPerBlock; i++) {
+-			if (!yaffs_CheckChunkErased
+-			    (dev, blockNo * dev->nChunksPerBlock + i)) {
+-				T(YAFFS_TRACE_ERROR,
+-				  (TSTR
+-				   (">>Block %d erasure supposedly OK, but chunk %d not erased"
+-				    TENDSTR), blockNo, i));
+-			}
+-		}
+-	}
+-
+-	if (erasedOk) {
+-		/* Clean it up... */
+-		bi->blockState = YAFFS_BLOCK_STATE_EMPTY;
+-		dev->nErasedBlocks++;
+-		bi->pagesInUse = 0;
+-		bi->softDeletions = 0;
+-		bi->hasShrinkHeader = 0;
+-		bi->skipErasedCheck = 1;  /* This is clean, so no need to check */
+-		bi->gcPrioritise = 0;
+-		yaffs_ClearChunkBits(dev, blockNo);
+-
+-		T(YAFFS_TRACE_ERASE,
+-		  (TSTR("Erased block %d" TENDSTR), blockNo));
+-	} else {
+-		dev->nFreeChunks -= dev->nChunksPerBlock;	/* We lost a block of free space */
+-
+-		yaffs_RetireBlock(dev, blockNo);
+-		T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
+-		  (TSTR("**>> Block %d retired" TENDSTR), blockNo));
+-	}
+-}
+-
+-static int yaffs_FindBlockForAllocation(yaffs_Device *dev)
+-{
+-	int i;
+-
+-	yaffs_BlockInfo *bi;
+-
+-	if (dev->nErasedBlocks < 1) {
+-		/* Hoosterman we've got a problem.
+-		 * Can't get space to gc
+-		 */
+-		T(YAFFS_TRACE_ERROR,
+-		  (TSTR("yaffs tragedy: no more erased blocks" TENDSTR)));
+-
+-		return -1;
+-	}
+-
+-	/* Find an empty block. */
+-
+-	for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
+-		dev->allocationBlockFinder++;
+-		if (dev->allocationBlockFinder < dev->internalStartBlock
+-		    || dev->allocationBlockFinder > dev->internalEndBlock) {
+-			dev->allocationBlockFinder = dev->internalStartBlock;
+-		}
+-
+-		bi = yaffs_GetBlockInfo(dev, dev->allocationBlockFinder);
+-
+-		if (bi->blockState == YAFFS_BLOCK_STATE_EMPTY) {
+-			bi->blockState = YAFFS_BLOCK_STATE_ALLOCATING;
+-			dev->sequenceNumber++;
+-			bi->sequenceNumber = dev->sequenceNumber;
+-			dev->nErasedBlocks--;
+-			T(YAFFS_TRACE_ALLOCATE,
+-			  (TSTR("Allocated block %d, seq  %d, %d left" TENDSTR),
+-			   dev->allocationBlockFinder, dev->sequenceNumber,
+-			   dev->nErasedBlocks));
+-			return dev->allocationBlockFinder;
+-		}
+-	}
+-
+-	T(YAFFS_TRACE_ALWAYS,
+-	  (TSTR
+-	   ("yaffs tragedy: no more erased blocks, but there should have been %d"
+-	    TENDSTR), dev->nErasedBlocks));
+-
+-	return -1;
+-}
+-
+-
+-
+-static int yaffs_CalcCheckpointBlocksRequired(yaffs_Device *dev)
+-{
+-	if (!dev->nCheckpointBlocksRequired &&
+-	   dev->isYaffs2) {
+-		/* Not a valid value so recalculate */
+-		int nBytes = 0;
+-		int nBlocks;
+-		int devBlocks = (dev->endBlock - dev->startBlock + 1);
+-		int tnodeSize;
+-
+-		tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
+-
+-		if (tnodeSize < sizeof(yaffs_Tnode))
+-			tnodeSize = sizeof(yaffs_Tnode);
+-
+-		nBytes += sizeof(yaffs_CheckpointValidity);
+-		nBytes += sizeof(yaffs_CheckpointDevice);
+-		nBytes += devBlocks * sizeof(yaffs_BlockInfo);
+-		nBytes += devBlocks * dev->chunkBitmapStride;
+-		nBytes += (sizeof(yaffs_CheckpointObject) + sizeof(__u32)) * (dev->nObjectsCreated - dev->nFreeObjects);
+-		nBytes += (tnodeSize + sizeof(__u32)) * (dev->nTnodesCreated - dev->nFreeTnodes);
+-		nBytes += sizeof(yaffs_CheckpointValidity);
+-		nBytes += sizeof(__u32); /* checksum*/
+-
+-		/* Round up and add 2 blocks to allow for some bad blocks, so add 3 */
+-
+-		nBlocks = (nBytes/(dev->nDataBytesPerChunk * dev->nChunksPerBlock)) + 3;
+-
+-		dev->nCheckpointBlocksRequired = nBlocks;
+-	}
+-
+-	return dev->nCheckpointBlocksRequired;
+-}
+-
+-/*
+- * Check if there's space to allocate...
+- * Thinks.... do we need top make this ths same as yaffs_GetFreeChunks()?
+- */
+-static int yaffs_CheckSpaceForAllocation(yaffs_Device *dev)
+-{
+-	int reservedChunks;
+-	int reservedBlocks = dev->nReservedBlocks;
+-	int checkpointBlocks;
+-
+-	if (dev->isYaffs2) {
+-		checkpointBlocks =  yaffs_CalcCheckpointBlocksRequired(dev) -
+-				    dev->blocksInCheckpoint;
+-		if (checkpointBlocks < 0)
+-			checkpointBlocks = 0;
+-	} else {
+-		checkpointBlocks = 0;
+-	}
+-
+-	reservedChunks = ((reservedBlocks + checkpointBlocks) * dev->nChunksPerBlock);
+-
+-	return (dev->nFreeChunks > reservedChunks);
+-}
+-
+-static int yaffs_AllocateChunk(yaffs_Device *dev, int useReserve,
+-		yaffs_BlockInfo **blockUsedPtr)
+-{
+-	int retVal;
+-	yaffs_BlockInfo *bi;
+-
+-	if (dev->allocationBlock < 0) {
+-		/* Get next block to allocate off */
+-		dev->allocationBlock = yaffs_FindBlockForAllocation(dev);
+-		dev->allocationPage = 0;
+-	}
+-
+-	if (!useReserve && !yaffs_CheckSpaceForAllocation(dev)) {
+-		/* Not enough space to allocate unless we're allowed to use the reserve. */
+-		return -1;
+-	}
+-
+-	if (dev->nErasedBlocks < dev->nReservedBlocks
+-			&& dev->allocationPage == 0) {
+-		T(YAFFS_TRACE_ALLOCATE, (TSTR("Allocating reserve" TENDSTR)));
+-	}
+-
+-	/* Next page please.... */
+-	if (dev->allocationBlock >= 0) {
+-		bi = yaffs_GetBlockInfo(dev, dev->allocationBlock);
+-
+-		retVal = (dev->allocationBlock * dev->nChunksPerBlock) +
+-			dev->allocationPage;
+-		bi->pagesInUse++;
+-		yaffs_SetChunkBit(dev, dev->allocationBlock,
+-				dev->allocationPage);
+-
+-		dev->allocationPage++;
+-
+-		dev->nFreeChunks--;
+-
+-		/* If the block is full set the state to full */
+-		if (dev->allocationPage >= dev->nChunksPerBlock) {
+-			bi->blockState = YAFFS_BLOCK_STATE_FULL;
+-			dev->allocationBlock = -1;
+-		}
+-
+-		if (blockUsedPtr)
+-			*blockUsedPtr = bi;
+-
+-		return retVal;
+-	}
+-
+-	T(YAFFS_TRACE_ERROR,
+-			(TSTR("!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!" TENDSTR)));
+-
+-	return -1;
+-}
+-
+-static int yaffs_GetErasedChunks(yaffs_Device *dev)
+-{
+-	int n;
+-
+-	n = dev->nErasedBlocks * dev->nChunksPerBlock;
+-
+-	if (dev->allocationBlock > 0)
+-		n += (dev->nChunksPerBlock - dev->allocationPage);
+-
+-	return n;
+-
+-}
+-
+-static int yaffs_GarbageCollectBlock(yaffs_Device *dev, int block,
+-		int wholeBlock)
+-{
+-	int oldChunk;
+-	int newChunk;
+-	int markNAND;
+-	int retVal = YAFFS_OK;
+-	int cleanups = 0;
+-	int i;
+-	int isCheckpointBlock;
+-	int matchingChunk;
+-	int maxCopies;
+-
+-	int chunksBefore = yaffs_GetErasedChunks(dev);
+-	int chunksAfter;
+-
+-	yaffs_ExtendedTags tags;
+-
+-	yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, block);
+-
+-	yaffs_Object *object;
+-
+-	isCheckpointBlock = (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT);
+-
+-	bi->blockState = YAFFS_BLOCK_STATE_COLLECTING;
+-
+-	T(YAFFS_TRACE_TRACING,
+-			(TSTR("Collecting block %d, in use %d, shrink %d, wholeBlock %d" TENDSTR),
+-			 block,
+-			 bi->pagesInUse,
+-			 bi->hasShrinkHeader,
+-			 wholeBlock));
+-
+-	/*yaffs_VerifyFreeChunks(dev); */
+-
+-	bi->hasShrinkHeader = 0;	/* clear the flag so that the block can erase */
+-
+-	/* Take off the number of soft deleted entries because
+-	 * they're going to get really deleted during GC.
+-	 */
+-	dev->nFreeChunks -= bi->softDeletions;
+-
+-	dev->isDoingGC = 1;
+-
+-	if (isCheckpointBlock ||
+-			!yaffs_StillSomeChunkBits(dev, block)) {
+-		T(YAFFS_TRACE_TRACING,
+-				(TSTR
+-				 ("Collecting block %d that has no chunks in use" TENDSTR),
+-				 block));
+-		yaffs_BlockBecameDirty(dev, block);
+-	} else {
+-
+-		__u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
+-
+-		yaffs_VerifyBlock(dev, bi, block);
+-
+-		maxCopies = (wholeBlock) ? dev->nChunksPerBlock : 10;
+-		oldChunk = block * dev->nChunksPerBlock + dev->gcChunk;
+-
+-		for (/* init already done */;
+-		     retVal == YAFFS_OK &&
+-		     dev->gcChunk < dev->nChunksPerBlock &&
+-		     (bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) &&
+-		     maxCopies > 0;
+-		     dev->gcChunk++, oldChunk++) {
+-			if (yaffs_CheckChunkBit(dev, block, dev->gcChunk)) {
+-
+-				/* This page is in use and might need to be copied off */
+-
+-				maxCopies--;
+-
+-				markNAND = 1;
+-
+-				yaffs_InitialiseTags(&tags);
+-
+-				yaffs_ReadChunkWithTagsFromNAND(dev, oldChunk,
+-								buffer, &tags);
+-
+-				object =
+-				    yaffs_FindObjectByNumber(dev,
+-							     tags.objectId);
+-
+-				T(YAFFS_TRACE_GC_DETAIL,
+-				  (TSTR
+-				   ("Collecting chunk in block %d, %d %d %d " TENDSTR),
+-				   dev->gcChunk, tags.objectId, tags.chunkId,
+-				   tags.byteCount));
+-
+-				if (object && !yaffs_SkipVerification(dev)) {
+-					if (tags.chunkId == 0)
+-						matchingChunk = object->hdrChunk;
+-					else if (object->softDeleted)
+-						matchingChunk = oldChunk; /* Defeat the test */
+-					else
+-						matchingChunk = yaffs_FindChunkInFile(object, tags.chunkId, NULL);
+-
+-					if (oldChunk != matchingChunk)
+-						T(YAFFS_TRACE_ERROR,
+-						  (TSTR("gc: page in gc mismatch: %d %d %d %d"TENDSTR),
+-						  oldChunk, matchingChunk, tags.objectId, tags.chunkId));
+-
+-				}
+-
+-				if (!object) {
+-					T(YAFFS_TRACE_ERROR,
+-					  (TSTR
+-					   ("page %d in gc has no object: %d %d %d "
+-					    TENDSTR), oldChunk,
+-					    tags.objectId, tags.chunkId, tags.byteCount));
+-				}
+-
+-				if (object &&
+-				    object->deleted &&
+-				    object->softDeleted &&
+-				    tags.chunkId != 0) {
+-					/* Data chunk in a soft deleted file, throw it away
+-					 * It's a soft deleted data chunk,
+-					 * No need to copy this, just forget about it and
+-					 * fix up the object.
+-					 */
+-
+-					object->nDataChunks--;
+-
+-					if (object->nDataChunks <= 0) {
+-						/* remeber to clean up the object */
+-						dev->gcCleanupList[cleanups] =
+-						    tags.objectId;
+-						cleanups++;
+-					}
+-					markNAND = 0;
+-				} else if (0) {
+-					/* Todo object && object->deleted && object->nDataChunks == 0 */
+-					/* Deleted object header with no data chunks.
+-					 * Can be discarded and the file deleted.
+-					 */
+-					object->hdrChunk = 0;
+-					yaffs_FreeTnode(object->myDev,
+-							object->variant.
+-							fileVariant.top);
+-					object->variant.fileVariant.top = NULL;
+-					yaffs_DoGenericObjectDeletion(object);
+-
+-				} else if (object) {
+-					/* It's either a data chunk in a live file or
+-					 * an ObjectHeader, so we're interested in it.
+-					 * NB Need to keep the ObjectHeaders of deleted files
+-					 * until the whole file has been deleted off
+-					 */
+-					tags.serialNumber++;
+-
+-					dev->nGCCopies++;
+-
+-					if (tags.chunkId == 0) {
+-						/* It is an object Id,
+-						 * We need to nuke the shrinkheader flags first
+-						 * We no longer want the shrinkHeader flag since its work is done
+-						 * and if it is left in place it will mess up scanning.
+-						 */
+-
+-						yaffs_ObjectHeader *oh;
+-						oh = (yaffs_ObjectHeader *)buffer;
+-						oh->isShrink = 0;
+-						tags.extraIsShrinkHeader = 0;
+-
+-						yaffs_VerifyObjectHeader(object, oh, &tags, 1);
+-					}
+-
+-					newChunk =
+-					    yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &tags, 1);
+-
+-					if (newChunk < 0) {
+-						retVal = YAFFS_FAIL;
+-					} else {
+-
+-						/* Ok, now fix up the Tnodes etc. */
+-
+-						if (tags.chunkId == 0) {
+-							/* It's a header */
+-							object->hdrChunk =  newChunk;
+-							object->serial =   tags.serialNumber;
+-						} else {
+-							/* It's a data chunk */
+-							yaffs_PutChunkIntoFile
+-							    (object,
+-							     tags.chunkId,
+-							     newChunk, 0);
+-						}
+-					}
+-				}
+-
+-				if (retVal == YAFFS_OK)
+-					yaffs_DeleteChunk(dev, oldChunk, markNAND, __LINE__);
+-
+-			}
+-		}
+-
+-		yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
+-
+-
+-		/* Do any required cleanups */
+-		for (i = 0; i < cleanups; i++) {
+-			/* Time to delete the file too */
+-			object =
+-			    yaffs_FindObjectByNumber(dev,
+-						     dev->gcCleanupList[i]);
+-			if (object) {
+-				yaffs_FreeTnode(dev,
+-						object->variant.fileVariant.
+-						top);
+-				object->variant.fileVariant.top = NULL;
+-				T(YAFFS_TRACE_GC,
+-				  (TSTR
+-				   ("yaffs: About to finally delete object %d"
+-				    TENDSTR), object->objectId));
+-				yaffs_DoGenericObjectDeletion(object);
+-				object->myDev->nDeletedFiles--;
+-			}
+-
+-		}
+-
+-	}
+-
+-	yaffs_VerifyCollectedBlock(dev, bi, block);
+-
+-	chunksAfter = yaffs_GetErasedChunks(dev);
+-	if (chunksBefore >= chunksAfter) {
+-		T(YAFFS_TRACE_GC,
+-		  (TSTR
+-		   ("gc did not increase free chunks before %d after %d"
+-		    TENDSTR), chunksBefore, chunksAfter));
+-	}
+-
+-	/* If the gc completed then clear the current gcBlock so that we find another. */
+-	if (bi->blockState != YAFFS_BLOCK_STATE_COLLECTING) {
+-		dev->gcBlock = -1;
+-		dev->gcChunk = 0;
+-	}
+-
+-	dev->isDoingGC = 0;
+-
+-	return retVal;
+-}
+-
+-/* New garbage collector
+- * If we're very low on erased blocks then we do aggressive garbage collection
+- * otherwise we do "leasurely" garbage collection.
+- * Aggressive gc looks further (whole array) and will accept less dirty blocks.
+- * Passive gc only inspects smaller areas and will only accept more dirty blocks.
+- *
+- * The idea is to help clear out space in a more spread-out manner.
+- * Dunno if it really does anything useful.
+- */
+-static int yaffs_CheckGarbageCollection(yaffs_Device *dev)
+-{
+-	int block;
+-	int aggressive;
+-	int gcOk = YAFFS_OK;
+-	int maxTries = 0;
+-
+-	int checkpointBlockAdjust;
+-
+-	if (dev->isDoingGC) {
+-		/* Bail out so we don't get recursive gc */
+-		return YAFFS_OK;
+-	}
+-
+-	/* This loop should pass the first time.
+-	 * We'll only see looping here if the erase of the collected block fails.
+-	 */
+-
+-	do {
+-		maxTries++;
+-
+-		checkpointBlockAdjust = yaffs_CalcCheckpointBlocksRequired(dev) - dev->blocksInCheckpoint;
+-		if (checkpointBlockAdjust < 0)
+-			checkpointBlockAdjust = 0;
+-
+-		if (dev->nErasedBlocks < (dev->nReservedBlocks + checkpointBlockAdjust + 2)) {
+-			/* We need a block soon...*/
+-			aggressive = 1;
+-		} else {
+-			/* We're in no hurry */
+-			aggressive = 0;
+-		}
+-
+-		if (dev->gcBlock <= 0) {
+-			dev->gcBlock = yaffs_FindBlockForGarbageCollection(dev, aggressive);
+-			dev->gcChunk = 0;
+-		}
+-
+-		block = dev->gcBlock;
+-
+-		if (block > 0) {
+-			dev->garbageCollections++;
+-			if (!aggressive)
+-				dev->passiveGarbageCollections++;
+-
+-			T(YAFFS_TRACE_GC,
+-			  (TSTR
+-			   ("yaffs: GC erasedBlocks %d aggressive %d" TENDSTR),
+-			   dev->nErasedBlocks, aggressive));
+-
+-			gcOk = yaffs_GarbageCollectBlock(dev, block, aggressive);
+-		}
+-
+-		if (dev->nErasedBlocks < (dev->nReservedBlocks) && block > 0) {
+-			T(YAFFS_TRACE_GC,
+-			  (TSTR
+-			   ("yaffs: GC !!!no reclaim!!! erasedBlocks %d after try %d block %d"
+-			    TENDSTR), dev->nErasedBlocks, maxTries, block));
+-		}
+-	} while ((dev->nErasedBlocks < dev->nReservedBlocks) &&
+-		 (block > 0) &&
+-		 (maxTries < 2));
+-
+-	return aggressive ? gcOk : YAFFS_OK;
+-}
+-
+-/*-------------------------  TAGS --------------------------------*/
+-
+-static int yaffs_TagsMatch(const yaffs_ExtendedTags *tags, int objectId,
+-			   int chunkInObject)
+-{
+-	return (tags->chunkId == chunkInObject &&
+-		tags->objectId == objectId && !tags->chunkDeleted) ? 1 : 0;
+-
+-}
+-
+-
+-/*-------------------- Data file manipulation -----------------*/
+-
+-static int yaffs_FindChunkInFile(yaffs_Object *in, int chunkInInode,
+-				 yaffs_ExtendedTags *tags)
+-{
+-	/*Get the Tnode, then get the level 0 offset chunk offset */
+-	yaffs_Tnode *tn;
+-	int theChunk = -1;
+-	yaffs_ExtendedTags localTags;
+-	int retVal = -1;
+-
+-	yaffs_Device *dev = in->myDev;
+-
+-	if (!tags) {
+-		/* Passed a NULL, so use our own tags space */
+-		tags = &localTags;
+-	}
+-
+-	tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode);
+-
+-	if (tn) {
+-		theChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
+-
+-		retVal =
+-		    yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId,
+-					   chunkInInode);
+-	}
+-	return retVal;
+-}
+-
+-static int yaffs_FindAndDeleteChunkInFile(yaffs_Object *in, int chunkInInode,
+-					  yaffs_ExtendedTags *tags)
+-{
+-	/* Get the Tnode, then get the level 0 offset chunk offset */
+-	yaffs_Tnode *tn;
+-	int theChunk = -1;
+-	yaffs_ExtendedTags localTags;
+-
+-	yaffs_Device *dev = in->myDev;
+-	int retVal = -1;
+-
+-	if (!tags) {
+-		/* Passed a NULL, so use our own tags space */
+-		tags = &localTags;
+-	}
+-
+-	tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode);
+-
+-	if (tn) {
+-
+-		theChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
+-
+-		retVal =
+-		    yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId,
+-					   chunkInInode);
+-
+-		/* Delete the entry in the filestructure (if found) */
+-		if (retVal != -1)
+-			yaffs_PutLevel0Tnode(dev, tn, chunkInInode, 0);
+-	}
+-
+-	return retVal;
+-}
+-
+-#ifdef YAFFS_PARANOID
+-
+-static int yaffs_CheckFileSanity(yaffs_Object *in)
+-{
+-	int chunk;
+-	int nChunks;
+-	int fSize;
+-	int failed = 0;
+-	int objId;
+-	yaffs_Tnode *tn;
+-	yaffs_Tags localTags;
+-	yaffs_Tags *tags = &localTags;
+-	int theChunk;
+-	int chunkDeleted;
+-
+-	if (in->variantType != YAFFS_OBJECT_TYPE_FILE)
+-		return YAFFS_FAIL;
+-
+-	objId = in->objectId;
+-	fSize = in->variant.fileVariant.fileSize;
+-	nChunks =
+-	    (fSize + in->myDev->nDataBytesPerChunk - 1) / in->myDev->nDataBytesPerChunk;
+-
+-	for (chunk = 1; chunk <= nChunks; chunk++) {
+-		tn = yaffs_FindLevel0Tnode(in->myDev, &in->variant.fileVariant,
+-					   chunk);
+-
+-		if (tn) {
+-
+-			theChunk = yaffs_GetChunkGroupBase(dev, tn, chunk);
+-
+-			if (yaffs_CheckChunkBits
+-			    (dev, theChunk / dev->nChunksPerBlock,
+-			     theChunk % dev->nChunksPerBlock)) {
+-
+-				yaffs_ReadChunkTagsFromNAND(in->myDev, theChunk,
+-							    tags,
+-							    &chunkDeleted);
+-				if (yaffs_TagsMatch
+-				    (tags, in->objectId, chunk, chunkDeleted)) {
+-					/* found it; */
+-
+-				}
+-			} else {
+-
+-				failed = 1;
+-			}
+-
+-		} else {
+-			/* T(("No level 0 found for %d\n", chunk)); */
+-		}
+-	}
+-
+-	return failed ? YAFFS_FAIL : YAFFS_OK;
+-}
+-
+-#endif
+-
+-static int yaffs_PutChunkIntoFile(yaffs_Object *in, int chunkInInode,
+-				  int chunkInNAND, int inScan)
+-{
+-	/* NB inScan is zero unless scanning.
+-	 * For forward scanning, inScan is > 0;
+-	 * for backward scanning inScan is < 0
+-	 */
+-
+-	yaffs_Tnode *tn;
+-	yaffs_Device *dev = in->myDev;
+-	int existingChunk;
+-	yaffs_ExtendedTags existingTags;
+-	yaffs_ExtendedTags newTags;
+-	unsigned existingSerial, newSerial;
+-
+-	if (in->variantType != YAFFS_OBJECT_TYPE_FILE) {
+-		/* Just ignore an attempt at putting a chunk into a non-file during scanning
+-		 * If it is not during Scanning then something went wrong!
+-		 */
+-		if (!inScan) {
+-			T(YAFFS_TRACE_ERROR,
+-			  (TSTR
+-			   ("yaffs tragedy:attempt to put data chunk into a non-file"
+-			    TENDSTR)));
+-			YBUG();
+-		}
+-
+-		yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__);
+-		return YAFFS_OK;
+-	}
+-
+-	tn = yaffs_AddOrFindLevel0Tnode(dev,
+-					&in->variant.fileVariant,
+-					chunkInInode,
+-					NULL);
+-	if (!tn)
+-		return YAFFS_FAIL;
+-
+-	existingChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
+-
+-	if (inScan != 0) {
+-		/* If we're scanning then we need to test for duplicates
+-		 * NB This does not need to be efficient since it should only ever
+-		 * happen when the power fails during a write, then only one
+-		 * chunk should ever be affected.
+-		 *
+-		 * Correction for YAFFS2: This could happen quite a lot and we need to think about efficiency! TODO
+-		 * Update: For backward scanning we don't need to re-read tags so this is quite cheap.
+-		 */
+-
+-		if (existingChunk > 0) {
+-			/* NB Right now existing chunk will not be real chunkId if the device >= 32MB
+-			 *    thus we have to do a FindChunkInFile to get the real chunk id.
+-			 *
+-			 * We have a duplicate now we need to decide which one to use:
+-			 *
+-			 * Backwards scanning YAFFS2: The old one is what we use, dump the new one.
+-			 * Forward scanning YAFFS2: The new one is what we use, dump the old one.
+-			 * YAFFS1: Get both sets of tags and compare serial numbers.
+-			 */
+-
+-			if (inScan > 0) {
+-				/* Only do this for forward scanning */
+-				yaffs_ReadChunkWithTagsFromNAND(dev,
+-								chunkInNAND,
+-								NULL, &newTags);
+-
+-				/* Do a proper find */
+-				existingChunk =
+-				    yaffs_FindChunkInFile(in, chunkInInode,
+-							  &existingTags);
+-			}
+-
+-			if (existingChunk <= 0) {
+-				/*Hoosterman - how did this happen? */
+-
+-				T(YAFFS_TRACE_ERROR,
+-				  (TSTR
+-				   ("yaffs tragedy: existing chunk < 0 in scan"
+-				    TENDSTR)));
+-
+-			}
+-
+-			/* NB The deleted flags should be false, otherwise the chunks will
+-			 * not be loaded during a scan
+-			 */
+-
+-			if (inScan > 0) {
+-				newSerial = newTags.serialNumber;
+-				existingSerial = existingTags.serialNumber;
+-			}
+-
+-			if ((inScan > 0) &&
+-			    (in->myDev->isYaffs2 ||
+-			     existingChunk <= 0 ||
+-			     ((existingSerial + 1) & 3) == newSerial)) {
+-				/* Forward scanning.
+-				 * Use new
+-				 * Delete the old one and drop through to update the tnode
+-				 */
+-				yaffs_DeleteChunk(dev, existingChunk, 1,
+-						  __LINE__);
+-			} else {
+-				/* Backward scanning or we want to use the existing one
+-				 * Use existing.
+-				 * Delete the new one and return early so that the tnode isn't changed
+-				 */
+-				yaffs_DeleteChunk(dev, chunkInNAND, 1,
+-						  __LINE__);
+-				return YAFFS_OK;
+-			}
+-		}
+-
+-	}
+-
+-	if (existingChunk == 0)
+-		in->nDataChunks++;
+-
+-	yaffs_PutLevel0Tnode(dev, tn, chunkInInode, chunkInNAND);
+-
+-	return YAFFS_OK;
+-}
+-
+-static int yaffs_ReadChunkDataFromObject(yaffs_Object *in, int chunkInInode,
+-					__u8 *buffer)
+-{
+-	int chunkInNAND = yaffs_FindChunkInFile(in, chunkInInode, NULL);
+-
+-	if (chunkInNAND >= 0)
+-		return yaffs_ReadChunkWithTagsFromNAND(in->myDev, chunkInNAND,
+-						buffer, NULL);
+-	else {
+-		T(YAFFS_TRACE_NANDACCESS,
+-		  (TSTR("Chunk %d not found zero instead" TENDSTR),
+-		   chunkInNAND));
+-		/* get sane (zero) data if you read a hole */
+-		memset(buffer, 0, in->myDev->nDataBytesPerChunk);
+-		return 0;
+-	}
+-
+-}
+-
+-void yaffs_DeleteChunk(yaffs_Device *dev, int chunkId, int markNAND, int lyn)
+-{
+-	int block;
+-	int page;
+-	yaffs_ExtendedTags tags;
+-	yaffs_BlockInfo *bi;
+-
+-	if (chunkId <= 0)
+-		return;
+-
+-	dev->nDeletions++;
+-	block = chunkId / dev->nChunksPerBlock;
+-	page = chunkId % dev->nChunksPerBlock;
+-
+-
+-	if (!yaffs_CheckChunkBit(dev, block, page))
+-		T(YAFFS_TRACE_VERIFY,
+-			(TSTR("Deleting invalid chunk %d"TENDSTR),
+-			 chunkId));
+-
+-	bi = yaffs_GetBlockInfo(dev, block);
+-
+-	T(YAFFS_TRACE_DELETION,
+-	  (TSTR("line %d delete of chunk %d" TENDSTR), lyn, chunkId));
+-
+-	if (markNAND &&
+-	    bi->blockState != YAFFS_BLOCK_STATE_COLLECTING && !dev->isYaffs2) {
+-
+-		yaffs_InitialiseTags(&tags);
+-
+-		tags.chunkDeleted = 1;
+-
+-		yaffs_WriteChunkWithTagsToNAND(dev, chunkId, NULL, &tags);
+-		yaffs_HandleUpdateChunk(dev, chunkId, &tags);
+-	} else {
+-		dev->nUnmarkedDeletions++;
+-	}
+-
+-	/* Pull out of the management area.
+-	 * If the whole block became dirty, this will kick off an erasure.
+-	 */
+-	if (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING ||
+-	    bi->blockState == YAFFS_BLOCK_STATE_FULL ||
+-	    bi->blockState == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
+-	    bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) {
+-		dev->nFreeChunks++;
+-
+-		yaffs_ClearChunkBit(dev, block, page);
+-
+-		bi->pagesInUse--;
+-
+-		if (bi->pagesInUse == 0 &&
+-		    !bi->hasShrinkHeader &&
+-		    bi->blockState != YAFFS_BLOCK_STATE_ALLOCATING &&
+-		    bi->blockState != YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
+-			yaffs_BlockBecameDirty(dev, block);
+-		}
+-
+-	}
+-
+-}
+-
+-static int yaffs_WriteChunkDataToObject(yaffs_Object *in, int chunkInInode,
+-					const __u8 *buffer, int nBytes,
+-					int useReserve)
+-{
+-	/* Find old chunk Need to do this to get serial number
+-	 * Write new one and patch into tree.
+-	 * Invalidate old tags.
+-	 */
+-
+-	int prevChunkId;
+-	yaffs_ExtendedTags prevTags;
+-
+-	int newChunkId;
+-	yaffs_ExtendedTags newTags;
+-
+-	yaffs_Device *dev = in->myDev;
+-
+-	yaffs_CheckGarbageCollection(dev);
+-
+-	/* Get the previous chunk at this location in the file if it exists */
+-	prevChunkId = yaffs_FindChunkInFile(in, chunkInInode, &prevTags);
+-
+-	/* Set up new tags */
+-	yaffs_InitialiseTags(&newTags);
+-
+-	newTags.chunkId = chunkInInode;
+-	newTags.objectId = in->objectId;
+-	newTags.serialNumber =
+-	    (prevChunkId >= 0) ? prevTags.serialNumber + 1 : 1;
+-	newTags.byteCount = nBytes;
+-
+-	if (nBytes < 1 || nBytes > dev->totalBytesPerChunk) {
+-		T(YAFFS_TRACE_ERROR,
+-		(TSTR("Writing %d bytes to chunk!!!!!!!!!" TENDSTR), nBytes));
+-		YBUG();
+-	}
+-
+-	newChunkId =
+-	    yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags,
+-					      useReserve);
+-
+-	if (newChunkId >= 0) {
+-		yaffs_PutChunkIntoFile(in, chunkInInode, newChunkId, 0);
+-
+-		if (prevChunkId >= 0)
+-			yaffs_DeleteChunk(dev, prevChunkId, 1, __LINE__);
+-
+-		yaffs_CheckFileSanity(in);
+-	}
+-	return newChunkId;
+-
+-}
+-
+-/* UpdateObjectHeader updates the header on NAND for an object.
+- * If name is not NULL, then that new name is used.
+- */
+-int yaffs_UpdateObjectHeader(yaffs_Object *in, const YCHAR *name, int force,
+-			     int isShrink, int shadows)
+-{
+-
+-	yaffs_BlockInfo *bi;
+-
+-	yaffs_Device *dev = in->myDev;
+-
+-	int prevChunkId;
+-	int retVal = 0;
+-	int result = 0;
+-
+-	int newChunkId;
+-	yaffs_ExtendedTags newTags;
+-	yaffs_ExtendedTags oldTags;
+-
+-	__u8 *buffer = NULL;
+-	YCHAR oldName[YAFFS_MAX_NAME_LENGTH + 1];
+-
+-	yaffs_ObjectHeader *oh = NULL;
++	yaffs_obj_t *in;
++	YCHAR *str = NULL;
+ 
+-	yaffs_strcpy(oldName, _Y("silly old name"));
++	yaffs_dev_t *dev = parent->my_dev;
+ 
++	/* Check if the entry exists. If it does then fail the call since we don't want a dup.*/
++	if (yaffs_find_by_name(parent, name))
++		return NULL;
+ 
+-	if (!in->fake ||
+-		in == dev->rootDir || /* The rootDir should also be saved */
+-		force) {
++	if (type == YAFFS_OBJECT_TYPE_SYMLINK) {
++		str = yaffs_clone_str(aliasString);
++		if (!str)
++			return NULL;
++	}
+ 
+-		yaffs_CheckGarbageCollection(dev);
+-		yaffs_CheckObjectDetailsLoaded(in);
++	in = yaffs_new_obj(dev, -1, type);
+ 
+-		buffer = yaffs_GetTempBuffer(in->myDev, __LINE__);
+-		oh = (yaffs_ObjectHeader *) buffer;
++	if (!in){
++		if(str)
++			YFREE(str);
++		return NULL;
++	}
+ 
+-		prevChunkId = in->hdrChunk;
+ 
+-		if (prevChunkId > 0) {
+-			result = yaffs_ReadChunkWithTagsFromNAND(dev, prevChunkId,
+-							buffer, &oldTags);
+ 
+-			yaffs_VerifyObjectHeader(in, oh, &oldTags, 0);
+ 
+-			memcpy(oldName, oh->name, sizeof(oh->name));
+-		}
+ 
+-		memset(buffer, 0xFF, dev->nDataBytesPerChunk);
++	if (in) {
++		in->hdr_chunk = 0;
++		in->valid = 1;
++		in->variant_type = type;
+ 
+-		oh->type = in->variantType;
+-		oh->yst_mode = in->yst_mode;
+-		oh->shadowsObject = oh->inbandShadowsObject = shadows;
++		in->yst_mode = mode;
+ 
+ #ifdef CONFIG_YAFFS_WINCE
+-		oh->win_atime[0] = in->win_atime[0];
+-		oh->win_ctime[0] = in->win_ctime[0];
+-		oh->win_mtime[0] = in->win_mtime[0];
+-		oh->win_atime[1] = in->win_atime[1];
+-		oh->win_ctime[1] = in->win_ctime[1];
+-		oh->win_mtime[1] = in->win_mtime[1];
++		yfsd_win_file_time_now(in->win_atime);
++		in->win_ctime[0] = in->win_mtime[0] = in->win_atime[0];
++		in->win_ctime[1] = in->win_mtime[1] = in->win_atime[1];
++
+ #else
+-		oh->yst_uid = in->yst_uid;
+-		oh->yst_gid = in->yst_gid;
+-		oh->yst_atime = in->yst_atime;
+-		oh->yst_mtime = in->yst_mtime;
+-		oh->yst_ctime = in->yst_ctime;
+-		oh->yst_rdev = in->yst_rdev;
++		in->yst_atime = in->yst_mtime = in->yst_ctime = Y_CURRENT_TIME;
++
++		in->yst_rdev = rdev;
++		in->yst_uid = uid;
++		in->yst_gid = gid;
+ #endif
+-		if (in->parent)
+-			oh->parentObjectId = in->parent->objectId;
+-		else
+-			oh->parentObjectId = 0;
++		in->n_data_chunks = 0;
+ 
+-		if (name && *name) {
+-			memset(oh->name, 0, sizeof(oh->name));
+-			yaffs_strncpy(oh->name, name, YAFFS_MAX_NAME_LENGTH);
+-		} else if (prevChunkId >= 0)
+-			memcpy(oh->name, oldName, sizeof(oh->name));
+-		else
+-			memset(oh->name, 0, sizeof(oh->name));
++		yaffs_set_obj_name(in, name);
++		in->dirty = 1;
+ 
+-		oh->isShrink = isShrink;
++		yaffs_add_obj_to_dir(parent, in);
+ 
+-		switch (in->variantType) {
+-		case YAFFS_OBJECT_TYPE_UNKNOWN:
+-			/* Should not happen */
+-			break;
+-		case YAFFS_OBJECT_TYPE_FILE:
+-			oh->fileSize =
+-			    (oh->parentObjectId == YAFFS_OBJECTID_DELETED
+-			     || oh->parentObjectId ==
+-			     YAFFS_OBJECTID_UNLINKED) ? 0 : in->variant.
+-			    fileVariant.fileSize;
++		in->my_dev = parent->my_dev;
++
++		switch (type) {
++		case YAFFS_OBJECT_TYPE_SYMLINK:
++			in->variant.symlink_variant.alias = str;
+ 			break;
+ 		case YAFFS_OBJECT_TYPE_HARDLINK:
+-			oh->equivalentObjectId =
+-			    in->variant.hardLinkVariant.equivalentObjectId;
+-			break;
+-		case YAFFS_OBJECT_TYPE_SPECIAL:
+-			/* Do nothing */
++			in->variant.hardlink_variant.equiv_obj =
++				equiv_obj;
++			in->variant.hardlink_variant.equiv_id =
++				equiv_obj->obj_id;
++			ylist_add(&in->hard_links, &equiv_obj->hard_links);
+ 			break;
++		case YAFFS_OBJECT_TYPE_FILE:
+ 		case YAFFS_OBJECT_TYPE_DIRECTORY:
+-			/* Do nothing */
+-			break;
+-		case YAFFS_OBJECT_TYPE_SYMLINK:
+-			yaffs_strncpy(oh->alias,
+-				      in->variant.symLinkVariant.alias,
+-				      YAFFS_MAX_ALIAS_LENGTH);
+-			oh->alias[YAFFS_MAX_ALIAS_LENGTH] = 0;
++		case YAFFS_OBJECT_TYPE_SPECIAL:
++		case YAFFS_OBJECT_TYPE_UNKNOWN:
++			/* do nothing */
+ 			break;
+ 		}
+ 
+-		/* Tags */
+-		yaffs_InitialiseTags(&newTags);
+-		in->serial++;
+-		newTags.chunkId = 0;
+-		newTags.objectId = in->objectId;
+-		newTags.serialNumber = in->serial;
+-
+-		/* Add extra info for file header */
+-
+-		newTags.extraHeaderInfoAvailable = 1;
+-		newTags.extraParentObjectId = oh->parentObjectId;
+-		newTags.extraFileLength = oh->fileSize;
+-		newTags.extraIsShrinkHeader = oh->isShrink;
+-		newTags.extraEquivalentObjectId = oh->equivalentObjectId;
+-		newTags.extraShadows = (oh->shadowsObject > 0) ? 1 : 0;
+-		newTags.extraObjectType = in->variantType;
+-
+-		yaffs_VerifyObjectHeader(in, oh, &newTags, 1);
+-
+-		/* Create new chunk in NAND */
+-		newChunkId =
+-		    yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags,
+-						      (prevChunkId >= 0) ? 1 : 0);
+-
+-		if (newChunkId >= 0) {
+-
+-			in->hdrChunk = newChunkId;
+-
+-			if (prevChunkId >= 0) {
+-				yaffs_DeleteChunk(dev, prevChunkId, 1,
+-						  __LINE__);
+-			}
+-
+-			if (!yaffs_ObjectHasCachedWriteData(in))
+-				in->dirty = 0;
+-
+-			/* If this was a shrink, then mark the block that the chunk lives on */
+-			if (isShrink) {
+-				bi = yaffs_GetBlockInfo(in->myDev,
+-					newChunkId / in->myDev->nChunksPerBlock);
+-				bi->hasShrinkHeader = 1;
+-			}
+-
++		if (yaffs_update_oh(in, name, 0, 0, 0, NULL) < 0) {
++			/* Could not create the object header, fail the creation */
++			yaffs_del_obj(in);
++			in = NULL;
+ 		}
+ 
+-		retVal = newChunkId;
+-
++		yaffs_update_parent(parent);
+ 	}
+ 
+-	if (buffer)
+-		yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
+-
+-	return retVal;
++	return in;
+ }
+ 
+-/*------------------------ Short Operations Cache ----------------------------------------
+- *   In many situations where there is no high level buffering (eg WinCE) a lot of
+- *   reads might be short sequential reads, and a lot of writes may be short
+- *   sequential writes. eg. scanning/writing a jpeg file.
+- *   In these cases, a short read/write cache can provide a huge perfomance benefit
+- *   with dumb-as-a-rock code.
+- *   In Linux, the page cache provides read buffering aand the short op cache provides write
+- *   buffering.
+- *
+- *   There are a limited number (~10) of cache chunks per device so that we don't
+- *   need a very intelligent search.
+- */
+-
+-static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj)
++yaffs_obj_t *yaffs_create_file(yaffs_obj_t *parent, const YCHAR *name,
++			__u32 mode, __u32 uid, __u32 gid)
+ {
+-	yaffs_Device *dev = obj->myDev;
+-	int i;
+-	yaffs_ChunkCache *cache;
+-	int nCaches = obj->myDev->nShortOpCaches;
+-
+-	for (i = 0; i < nCaches; i++) {
+-		cache = &dev->srCache[i];
+-		if (cache->object == obj &&
+-		    cache->dirty)
+-			return 1;
+-	}
++	return yaffs_create_obj(YAFFS_OBJECT_TYPE_FILE, parent, name, mode,
++				uid, gid, NULL, NULL, 0);
++}
+ 
+-	return 0;
++yaffs_obj_t *yaffs_create_dir(yaffs_obj_t *parent, const YCHAR *name,
++				__u32 mode, __u32 uid, __u32 gid)
++{
++	return yaffs_create_obj(YAFFS_OBJECT_TYPE_DIRECTORY, parent, name,
++				 mode, uid, gid, NULL, NULL, 0);
+ }
+ 
++yaffs_obj_t *yaffs_create_special(yaffs_obj_t *parent, const YCHAR *name,
++				__u32 mode, __u32 uid, __u32 gid, __u32 rdev)
++{
++	return yaffs_create_obj(YAFFS_OBJECT_TYPE_SPECIAL, parent, name, mode,
++				 uid, gid, NULL, NULL, rdev);
++}
+ 
+-static void yaffs_FlushFilesChunkCache(yaffs_Object *obj)
++yaffs_obj_t *yaffs_create_symlink(yaffs_obj_t *parent, const YCHAR *name,
++				__u32 mode, __u32 uid, __u32 gid,
++				const YCHAR *alias)
+ {
+-	yaffs_Device *dev = obj->myDev;
+-	int lowest = -99;	/* Stop compiler whining. */
+-	int i;
+-	yaffs_ChunkCache *cache;
+-	int chunkWritten = 0;
+-	int nCaches = obj->myDev->nShortOpCaches;
++	return yaffs_create_obj(YAFFS_OBJECT_TYPE_SYMLINK, parent, name, mode,
++				uid, gid, NULL, alias, 0);
++}
+ 
+-	if (nCaches > 0) {
+-		do {
+-			cache = NULL;
++/* yaffs_link_obj returns the object id of the equivalent object.*/
++yaffs_obj_t *yaffs_link_obj(yaffs_obj_t *parent, const YCHAR *name,
++			yaffs_obj_t *equiv_obj)
++{
++	/* Get the real object in case we were fed a hard link as an equivalent object */
++	equiv_obj = yaffs_get_equivalent_obj(equiv_obj);
+ 
+-			/* Find the dirty cache for this object with the lowest chunk id. */
+-			for (i = 0; i < nCaches; i++) {
+-				if (dev->srCache[i].object == obj &&
+-				    dev->srCache[i].dirty) {
+-					if (!cache
+-					    || dev->srCache[i].chunkId <
+-					    lowest) {
+-						cache = &dev->srCache[i];
+-						lowest = cache->chunkId;
+-					}
+-				}
+-			}
++	if (yaffs_create_obj
++	    (YAFFS_OBJECT_TYPE_HARDLINK, parent, name, 0, 0, 0,
++	     equiv_obj, NULL, 0)) {
++		return equiv_obj;
++	} else {
++		return NULL;
++	}
+ 
+-			if (cache && !cache->locked) {
+-				/* Write it out and free it up */
++}
+ 
+-				chunkWritten =
+-				    yaffs_WriteChunkDataToObject(cache->object,
+-								 cache->chunkId,
+-								 cache->data,
+-								 cache->nBytes,
+-								 1);
+-				cache->dirty = 0;
+-				cache->object = NULL;
+-			}
++static int yaffs_change_obj_name(yaffs_obj_t *obj, yaffs_obj_t *new_dir,
++				const YCHAR *new_name, int force, int shadows)
++{
++	int unlinkOp;
++	int deleteOp;
+ 
+-		} while (cache && chunkWritten > 0);
++	yaffs_obj_t *existingTarget;
+ 
+-		if (cache) {
+-			/* Hoosterman, disk full while writing cache out. */
+-			T(YAFFS_TRACE_ERROR,
+-			  (TSTR("yaffs tragedy: no space during cache write" TENDSTR)));
++	if (new_dir == NULL)
++		new_dir = obj->parent;	/* use the old directory */
+ 
+-		}
++	if (new_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
++		T(YAFFS_TRACE_ALWAYS,
++		  (TSTR
++		   ("tragedy: yaffs_change_obj_name: new_dir is not a directory"
++		    TENDSTR)));
++		YBUG();
+ 	}
+ 
+-}
++	/* TODO: Do we need this different handling for YAFFS2 and YAFFS1?? */
++	if (obj->my_dev->param.is_yaffs2)
++		unlinkOp = (new_dir == obj->my_dev->unlinked_dir);
++	else
++		unlinkOp = (new_dir == obj->my_dev->unlinked_dir
++			    && obj->variant_type == YAFFS_OBJECT_TYPE_FILE);
+ 
+-/*yaffs_FlushEntireDeviceCache(dev)
+- *
+- *
+- */
++	deleteOp = (new_dir == obj->my_dev->del_dir);
+ 
+-void yaffs_FlushEntireDeviceCache(yaffs_Device *dev)
+-{
+-	yaffs_Object *obj;
+-	int nCaches = dev->nShortOpCaches;
+-	int i;
++	existingTarget = yaffs_find_by_name(new_dir, new_name);
+ 
+-	/* Find a dirty object in the cache and flush it...
+-	 * until there are no further dirty objects.
++	/* If the object is a file going into the unlinked directory,
++	 *   then it is OK to just stuff it in since duplicate names are allowed.
++	 *   else only proceed if the new name does not exist and if we're putting
++	 *   it into a directory.
+ 	 */
+-	do {
+-		obj = NULL;
+-		for (i = 0; i < nCaches && !obj; i++) {
+-			if (dev->srCache[i].object &&
+-			    dev->srCache[i].dirty)
+-				obj = dev->srCache[i].object;
+-
+-		}
+-		if (obj)
+-			yaffs_FlushFilesChunkCache(obj);
+-
+-	} while (obj);
+-
+-}
++	if ((unlinkOp ||
++	     deleteOp ||
++	     force ||
++	     (shadows > 0) ||
++	     !existingTarget) &&
++	    new_dir->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) {
++		yaffs_set_obj_name(obj, new_name);
++		obj->dirty = 1;
+ 
++		yaffs_add_obj_to_dir(new_dir, obj);
+ 
+-/* Grab us a cache chunk for use.
+- * First look for an empty one.
+- * Then look for the least recently used non-dirty one.
+- * Then look for the least recently used dirty one...., flush and look again.
+- */
+-static yaffs_ChunkCache *yaffs_GrabChunkCacheWorker(yaffs_Device *dev)
+-{
+-	int i;
++		if (unlinkOp)
++			obj->unlinked = 1;
+ 
+-	if (dev->nShortOpCaches > 0) {
+-		for (i = 0; i < dev->nShortOpCaches; i++) {
+-			if (!dev->srCache[i].object)
+-				return &dev->srCache[i];
+-		}
++		/* If it is a deletion then we mark it as a shrink for gc purposes. */
++		if (yaffs_update_oh(obj, new_name, 0, deleteOp, shadows, NULL) >= 0)
++			return YAFFS_OK;
+ 	}
+ 
+-	return NULL;
++	return YAFFS_FAIL;
+ }
+ 
+-static yaffs_ChunkCache *yaffs_GrabChunkCache(yaffs_Device *dev)
++int yaffs_rename_obj(yaffs_obj_t *old_dir, const YCHAR *old_name,
++		yaffs_obj_t *new_dir, const YCHAR *new_name)
+ {
+-	yaffs_ChunkCache *cache;
+-	yaffs_Object *theObj;
+-	int usage;
+-	int i;
+-	int pushout;
+-
+-	if (dev->nShortOpCaches > 0) {
+-		/* Try find a non-dirty one... */
+-
+-		cache = yaffs_GrabChunkCacheWorker(dev);
++	yaffs_obj_t *obj = NULL;
++	yaffs_obj_t *existingTarget = NULL;
++	int force = 0;
++	int result;
++	yaffs_dev_t *dev;
+ 
+-		if (!cache) {
+-			/* They were all dirty, find the last recently used object and flush
+-			 * its cache, then  find again.
+-			 * NB what's here is not very accurate, we actually flush the object
+-			 * the last recently used page.
+-			 */
+ 
+-			/* With locking we can't assume we can use entry zero */
++	if (!old_dir || old_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
++		YBUG();
++	if (!new_dir || new_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
++		YBUG();
+ 
+-			theObj = NULL;
+-			usage = -1;
+-			cache = NULL;
+-			pushout = -1;
++	dev = old_dir->my_dev;
+ 
+-			for (i = 0; i < dev->nShortOpCaches; i++) {
+-				if (dev->srCache[i].object &&
+-				    !dev->srCache[i].locked &&
+-				    (dev->srCache[i].lastUse < usage || !cache)) {
+-					usage = dev->srCache[i].lastUse;
+-					theObj = dev->srCache[i].object;
+-					cache = &dev->srCache[i];
+-					pushout = i;
+-				}
+-			}
++#ifdef CONFIG_YAFFS_CASE_INSENSITIVE
++	/* Special case for case insemsitive systems (eg. WinCE).
++	 * While look-up is case insensitive, the name isn't.
++	 * Therefore we might want to change x.txt to X.txt
++	*/
++	if (old_dir == new_dir && yaffs_strcmp(old_name, new_name) == 0)
++		force = 1;
++#endif
+ 
+-			if (!cache || cache->dirty) {
+-				/* Flush and try again */
+-				yaffs_FlushFilesChunkCache(theObj);
+-				cache = yaffs_GrabChunkCacheWorker(dev);
+-			}
++	if(yaffs_strnlen(new_name,YAFFS_MAX_NAME_LENGTH+1) > YAFFS_MAX_NAME_LENGTH)
++		/* ENAMETOOLONG */
++		return YAFFS_FAIL;
+ 
+-		}
+-		return cache;
+-	} else
+-		return NULL;
++	obj = yaffs_find_by_name(old_dir, old_name);
+ 
+-}
++	if (obj && obj->rename_allowed) {
+ 
+-/* Find a cached chunk */
+-static yaffs_ChunkCache *yaffs_FindChunkCache(const yaffs_Object *obj,
+-					      int chunkId)
+-{
+-	yaffs_Device *dev = obj->myDev;
+-	int i;
+-	if (dev->nShortOpCaches > 0) {
+-		for (i = 0; i < dev->nShortOpCaches; i++) {
+-			if (dev->srCache[i].object == obj &&
+-			    dev->srCache[i].chunkId == chunkId) {
+-				dev->cacheHits++;
++		/* Now do the handling for an existing target, if there is one */
+ 
+-				return &dev->srCache[i];
+-			}
++		existingTarget = yaffs_find_by_name(new_dir, new_name);
++		if (existingTarget &&
++			existingTarget->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY &&
++			!ylist_empty(&existingTarget->variant.dir_variant.children)) {
++			/* There is a target that is a non-empty directory, so we fail */
++			return YAFFS_FAIL;	/* EEXIST or ENOTEMPTY */
++		} else if (existingTarget && existingTarget != obj) {
++			/* Nuke the target first, using shadowing,
++			 * but only if it isn't the same object.
++			 *
++			 * Note we must disable gc otherwise it can mess up the shadowing.
++			 *
++			 */
++			dev->gc_disable=1;
++			yaffs_change_obj_name(obj, new_dir, new_name, force,
++						existingTarget->obj_id);
++			existingTarget->is_shadowed = 1;
++			yaffs_unlink_obj(existingTarget);
++			dev->gc_disable=0;
+ 		}
++
++		result = yaffs_change_obj_name(obj, new_dir, new_name, 1, 0);
++
++		yaffs_update_parent(old_dir);
++		if(new_dir != old_dir)
++			yaffs_update_parent(new_dir);
++		
++		return result;
+ 	}
+-	return NULL;
++	return YAFFS_FAIL;
+ }
+ 
+-/* Mark the chunk for the least recently used algorithym */
+-static void yaffs_UseChunkCache(yaffs_Device *dev, yaffs_ChunkCache *cache,
+-				int isAWrite)
++/*------------------------- Block Management and Page Allocation ----------------*/
++
++static int yaffs_init_blocks(yaffs_dev_t *dev)
+ {
++	int nBlocks = dev->internal_end_block - dev->internal_start_block + 1;
+ 
+-	if (dev->nShortOpCaches > 0) {
+-		if (dev->srLastUse < 0 || dev->srLastUse > 100000000) {
+-			/* Reset the cache usages */
+-			int i;
+-			for (i = 1; i < dev->nShortOpCaches; i++)
+-				dev->srCache[i].lastUse = 0;
++	dev->block_info = NULL;
++	dev->chunk_bits = NULL;
+ 
+-			dev->srLastUse = 0;
+-		}
++	dev->alloc_block = -1;	/* force it to get a new one */
+ 
+-		dev->srLastUse++;
++	/* If the first allocation strategy fails, thry the alternate one */
++	dev->block_info = YMALLOC(nBlocks * sizeof(yaffs_block_info_t));
++	if (!dev->block_info) {
++		dev->block_info = YMALLOC_ALT(nBlocks * sizeof(yaffs_block_info_t));
++		dev->block_info_alt = 1;
++	} else
++		dev->block_info_alt = 0;
+ 
+-		cache->lastUse = dev->srLastUse;
++	if (dev->block_info) {
++		/* Set up dynamic blockinfo stuff. */
++		dev->chunk_bit_stride = (dev->param.chunks_per_block + 7) / 8; /* round up bytes */
++		dev->chunk_bits = YMALLOC(dev->chunk_bit_stride * nBlocks);
++		if (!dev->chunk_bits) {
++			dev->chunk_bits = YMALLOC_ALT(dev->chunk_bit_stride * nBlocks);
++			dev->chunk_bits_alt = 1;
++		} else
++			dev->chunk_bits_alt = 0;
++	}
+ 
+-		if (isAWrite)
+-			cache->dirty = 1;
++	if (dev->block_info && dev->chunk_bits) {
++		memset(dev->block_info, 0, nBlocks * sizeof(yaffs_block_info_t));
++		memset(dev->chunk_bits, 0, dev->chunk_bit_stride * nBlocks);
++		return YAFFS_OK;
+ 	}
++
++	return YAFFS_FAIL;
+ }
+ 
+-/* Invalidate a single cache page.
+- * Do this when a whole page gets written,
+- * ie the short cache for this page is no longer valid.
+- */
+-static void yaffs_InvalidateChunkCache(yaffs_Object *object, int chunkId)
++static void yaffs_deinit_blocks(yaffs_dev_t *dev)
+ {
+-	if (object->myDev->nShortOpCaches > 0) {
+-		yaffs_ChunkCache *cache = yaffs_FindChunkCache(object, chunkId);
++	if (dev->block_info_alt && dev->block_info)
++		YFREE_ALT(dev->block_info);
++	else if (dev->block_info)
++		YFREE(dev->block_info);
+ 
+-		if (cache)
+-			cache->object = NULL;
+-	}
+-}
++	dev->block_info_alt = 0;
+ 
+-/* Invalidate all the cache pages associated with this object
+- * Do this whenever ther file is deleted or resized.
+- */
+-static void yaffs_InvalidateWholeChunkCache(yaffs_Object *in)
+-{
+-	int i;
+-	yaffs_Device *dev = in->myDev;
++	dev->block_info = NULL;
+ 
+-	if (dev->nShortOpCaches > 0) {
+-		/* Invalidate it. */
+-		for (i = 0; i < dev->nShortOpCaches; i++) {
+-			if (dev->srCache[i].object == in)
+-				dev->srCache[i].object = NULL;
+-		}
+-	}
++	if (dev->chunk_bits_alt && dev->chunk_bits)
++		YFREE_ALT(dev->chunk_bits);
++	else if (dev->chunk_bits)
++		YFREE(dev->chunk_bits);
++	dev->chunk_bits_alt = 0;
++	dev->chunk_bits = NULL;
+ }
+ 
+-/*--------------------- Checkpointing --------------------*/
++void yaffs_block_became_dirty(yaffs_dev_t *dev, int block_no)
++{
++	yaffs_block_info_t *bi = yaffs_get_block_info(dev, block_no);
+ 
++	int erasedOk = 0;
+ 
+-static int yaffs_WriteCheckpointValidityMarker(yaffs_Device *dev, int head)
+-{
+-	yaffs_CheckpointValidity cp;
++	/* If the block is still healthy erase it and mark as clean.
++	 * If the block has had a data failure, then retire it.
++	 */
+ 
+-	memset(&cp, 0, sizeof(cp));
++	T(YAFFS_TRACE_GC | YAFFS_TRACE_ERASE,
++		(TSTR("yaffs_block_became_dirty block %d state %d %s"TENDSTR),
++		block_no, bi->block_state, (bi->needs_retiring) ? "needs retiring" : ""));
+ 
+-	cp.structType = sizeof(cp);
+-	cp.magic = YAFFS_MAGIC;
+-	cp.version = YAFFS_CHECKPOINT_VERSION;
+-	cp.head = (head) ? 1 : 0;
++	yaffs2_clear_oldest_dirty_seq(dev,bi);
+ 
+-	return (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp)) ?
+-		1 : 0;
+-}
++	bi->block_state = YAFFS_BLOCK_STATE_DIRTY;
+ 
+-static int yaffs_ReadCheckpointValidityMarker(yaffs_Device *dev, int head)
+-{
+-	yaffs_CheckpointValidity cp;
+-	int ok;
++	/* If this is the block being garbage collected then stop gc'ing this block */
++	if(block_no == dev->gc_block)
++		dev->gc_block = 0;
+ 
+-	ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
++	/* If this block is currently the best candidate for gc then drop as a candidate */
++	if(block_no == dev->gc_dirtiest){
++		dev->gc_dirtiest = 0;
++		dev->gc_pages_in_use = 0;
++	}
+ 
+-	if (ok)
+-		ok = (cp.structType == sizeof(cp)) &&
+-		     (cp.magic == YAFFS_MAGIC) &&
+-		     (cp.version == YAFFS_CHECKPOINT_VERSION) &&
+-		     (cp.head == ((head) ? 1 : 0));
+-	return ok ? 1 : 0;
+-}
++	if (!bi->needs_retiring) {
++		yaffs2_checkpt_invalidate(dev);
++		erasedOk = yaffs_erase_block(dev, block_no);
++		if (!erasedOk) {
++			dev->n_erase_failures++;
++			T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
++			  (TSTR("**>> Erasure failed %d" TENDSTR), block_no));
++		}
++	}
+ 
+-static void yaffs_DeviceToCheckpointDevice(yaffs_CheckpointDevice *cp,
+-					   yaffs_Device *dev)
+-{
+-	cp->nErasedBlocks = dev->nErasedBlocks;
+-	cp->allocationBlock = dev->allocationBlock;
+-	cp->allocationPage = dev->allocationPage;
+-	cp->nFreeChunks = dev->nFreeChunks;
++	if (erasedOk &&
++	    ((yaffs_trace_mask & YAFFS_TRACE_ERASE) || !yaffs_skip_verification(dev))) {
++		int i;
++		for (i = 0; i < dev->param.chunks_per_block; i++) {
++			if (!yaffs_check_chunk_erased
++			    (dev, block_no * dev->param.chunks_per_block + i)) {
++				T(YAFFS_TRACE_ERROR,
++				  (TSTR
++				   (">>Block %d erasure supposedly OK, but chunk %d not erased"
++				    TENDSTR), block_no, i));
++			}
++		}
++	}
++
++	if (erasedOk) {
++		/* Clean it up... */
++		bi->block_state = YAFFS_BLOCK_STATE_EMPTY;
++		bi->seq_number = 0;
++		dev->n_erased_blocks++;
++		bi->pages_in_use = 0;
++		bi->soft_del_pages = 0;
++		bi->has_shrink_hdr = 0;
++		bi->skip_erased_check = 1;  /* This is clean, so no need to check */
++		bi->gc_prioritise = 0;
++		yaffs_clear_chunk_bits(dev, block_no);
+ 
+-	cp->nDeletedFiles = dev->nDeletedFiles;
+-	cp->nUnlinkedFiles = dev->nUnlinkedFiles;
+-	cp->nBackgroundDeletions = dev->nBackgroundDeletions;
+-	cp->sequenceNumber = dev->sequenceNumber;
+-	cp->oldestDirtySequence = dev->oldestDirtySequence;
++		T(YAFFS_TRACE_ERASE,
++		  (TSTR("Erased block %d" TENDSTR), block_no));
++	} else {
++		dev->n_free_chunks -= dev->param.chunks_per_block;	/* We lost a block of free space */
+ 
++		yaffs_retire_block(dev, block_no);
++		T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
++		  (TSTR("**>> Block %d retired" TENDSTR), block_no));
++	}
+ }
+ 
+-static void yaffs_CheckpointDeviceToDevice(yaffs_Device *dev,
+-					   yaffs_CheckpointDevice *cp)
++static int yaffs_find_alloc_block(yaffs_dev_t *dev)
+ {
+-	dev->nErasedBlocks = cp->nErasedBlocks;
+-	dev->allocationBlock = cp->allocationBlock;
+-	dev->allocationPage = cp->allocationPage;
+-	dev->nFreeChunks = cp->nFreeChunks;
+-
+-	dev->nDeletedFiles = cp->nDeletedFiles;
+-	dev->nUnlinkedFiles = cp->nUnlinkedFiles;
+-	dev->nBackgroundDeletions = cp->nBackgroundDeletions;
+-	dev->sequenceNumber = cp->sequenceNumber;
+-	dev->oldestDirtySequence = cp->oldestDirtySequence;
+-}
++	int i;
+ 
++	yaffs_block_info_t *bi;
+ 
+-static int yaffs_WriteCheckpointDevice(yaffs_Device *dev)
+-{
+-	yaffs_CheckpointDevice cp;
+-	__u32 nBytes;
+-	__u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1);
++	if (dev->n_erased_blocks < 1) {
++		/* Hoosterman we've got a problem.
++		 * Can't get space to gc
++		 */
++		T(YAFFS_TRACE_ERROR,
++		  (TSTR("yaffs tragedy: no more erased blocks" TENDSTR)));
+ 
+-	int ok;
++		return -1;
++	}
+ 
+-	/* Write device runtime values*/
+-	yaffs_DeviceToCheckpointDevice(&cp, dev);
+-	cp.structType = sizeof(cp);
++	/* Find an empty block. */
+ 
+-	ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
++	for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) {
++		dev->alloc_block_finder++;
++		if (dev->alloc_block_finder < dev->internal_start_block
++		    || dev->alloc_block_finder > dev->internal_end_block) {
++			dev->alloc_block_finder = dev->internal_start_block;
++		}
+ 
+-	/* Write block info */
+-	if (ok) {
+-		nBytes = nBlocks * sizeof(yaffs_BlockInfo);
+-		ok = (yaffs_CheckpointWrite(dev, dev->blockInfo, nBytes) == nBytes);
++		bi = yaffs_get_block_info(dev, dev->alloc_block_finder);
++
++		if (bi->block_state == YAFFS_BLOCK_STATE_EMPTY) {
++			bi->block_state = YAFFS_BLOCK_STATE_ALLOCATING;
++			dev->seq_number++;
++			bi->seq_number = dev->seq_number;
++			dev->n_erased_blocks--;
++			T(YAFFS_TRACE_ALLOCATE,
++			  (TSTR("Allocated block %d, seq  %d, %d left" TENDSTR),
++			   dev->alloc_block_finder, dev->seq_number,
++			   dev->n_erased_blocks));
++			return dev->alloc_block_finder;
++		}
+ 	}
+ 
+-	/* Write chunk bits */
+-	if (ok) {
+-		nBytes = nBlocks * dev->chunkBitmapStride;
+-		ok = (yaffs_CheckpointWrite(dev, dev->chunkBits, nBytes) == nBytes);
+-	}
+-	return	 ok ? 1 : 0;
++	T(YAFFS_TRACE_ALWAYS,
++	  (TSTR
++	   ("yaffs tragedy: no more erased blocks, but there should have been %d"
++	    TENDSTR), dev->n_erased_blocks));
+ 
++	return -1;
+ }
+ 
+-static int yaffs_ReadCheckpointDevice(yaffs_Device *dev)
++
++/*
++ * Check if there's space to allocate...
++ * Thinks.... do we need top make this ths same as yaffs_get_free_chunks()?
++ */
++int yaffs_check_alloc_available(yaffs_dev_t *dev, int n_chunks)
+ {
+-	yaffs_CheckpointDevice cp;
+-	__u32 nBytes;
+-	__u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1);
++	int reservedChunks;
++	int reservedBlocks = dev->param.n_reserved_blocks;
++	int checkpointBlocks;
+ 
+-	int ok;
++	checkpointBlocks = yaffs_calc_checkpt_blocks_required(dev);
+ 
+-	ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
+-	if (!ok)
+-		return 0;
++	reservedChunks = ((reservedBlocks + checkpointBlocks) * dev->param.chunks_per_block);
+ 
+-	if (cp.structType != sizeof(cp))
+-		return 0;
++	return (dev->n_free_chunks > (reservedChunks + n_chunks));
++}
++
++static int yaffs_alloc_chunk(yaffs_dev_t *dev, int useReserve,
++		yaffs_block_info_t **blockUsedPtr)
++{
++	int retVal;
++	yaffs_block_info_t *bi;
++
++	if (dev->alloc_block < 0) {
++		/* Get next block to allocate off */
++		dev->alloc_block = yaffs_find_alloc_block(dev);
++		dev->alloc_page = 0;
++	}
+ 
++	if (!useReserve && !yaffs_check_alloc_available(dev, 1)) {
++		/* Not enough space to allocate unless we're allowed to use the reserve. */
++		return -1;
++	}
+ 
+-	yaffs_CheckpointDeviceToDevice(dev, &cp);
++	if (dev->n_erased_blocks < dev->param.n_reserved_blocks
++			&& dev->alloc_page == 0) {
++		T(YAFFS_TRACE_ALLOCATE, (TSTR("Allocating reserve" TENDSTR)));
++	}
+ 
+-	nBytes = nBlocks * sizeof(yaffs_BlockInfo);
++	/* Next page please.... */
++	if (dev->alloc_block >= 0) {
++		bi = yaffs_get_block_info(dev, dev->alloc_block);
+ 
+-	ok = (yaffs_CheckpointRead(dev, dev->blockInfo, nBytes) == nBytes);
++		retVal = (dev->alloc_block * dev->param.chunks_per_block) +
++			dev->alloc_page;
++		bi->pages_in_use++;
++		yaffs_set_chunk_bit(dev, dev->alloc_block,
++				dev->alloc_page);
+ 
+-	if (!ok)
+-		return 0;
+-	nBytes = nBlocks * dev->chunkBitmapStride;
++		dev->alloc_page++;
+ 
+-	ok = (yaffs_CheckpointRead(dev, dev->chunkBits, nBytes) == nBytes);
++		dev->n_free_chunks--;
+ 
+-	return ok ? 1 : 0;
+-}
++		/* If the block is full set the state to full */
++		if (dev->alloc_page >= dev->param.chunks_per_block) {
++			bi->block_state = YAFFS_BLOCK_STATE_FULL;
++			dev->alloc_block = -1;
++		}
+ 
+-static void yaffs_ObjectToCheckpointObject(yaffs_CheckpointObject *cp,
+-					   yaffs_Object *obj)
+-{
++		if (blockUsedPtr)
++			*blockUsedPtr = bi;
++
++		return retVal;
++	}
+ 
+-	cp->objectId = obj->objectId;
+-	cp->parentId = (obj->parent) ? obj->parent->objectId : 0;
+-	cp->hdrChunk = obj->hdrChunk;
+-	cp->variantType = obj->variantType;
+-	cp->deleted = obj->deleted;
+-	cp->softDeleted = obj->softDeleted;
+-	cp->unlinked = obj->unlinked;
+-	cp->fake = obj->fake;
+-	cp->renameAllowed = obj->renameAllowed;
+-	cp->unlinkAllowed = obj->unlinkAllowed;
+-	cp->serial = obj->serial;
+-	cp->nDataChunks = obj->nDataChunks;
++	T(YAFFS_TRACE_ERROR,
++			(TSTR("!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!" TENDSTR)));
+ 
+-	if (obj->variantType == YAFFS_OBJECT_TYPE_FILE)
+-		cp->fileSizeOrEquivalentObjectId = obj->variant.fileVariant.fileSize;
+-	else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK)
+-		cp->fileSizeOrEquivalentObjectId = obj->variant.hardLinkVariant.equivalentObjectId;
++	return -1;
+ }
+ 
+-static int yaffs_CheckpointObjectToObject(yaffs_Object *obj, yaffs_CheckpointObject *cp)
++static int yaffs_get_erased_chunks(yaffs_dev_t *dev)
+ {
++	int n;
+ 
+-	yaffs_Object *parent;
++	n = dev->n_erased_blocks * dev->param.chunks_per_block;
+ 
+-	if (obj->variantType != cp->variantType) {
+-		T(YAFFS_TRACE_ERROR, (TSTR("Checkpoint read object %d type %d "
+-			TCONT("chunk %d does not match existing object type %d")
+-			TENDSTR), cp->objectId, cp->variantType, cp->hdrChunk,
+-			obj->variantType));
+-		return 0;
+-	}
++	if (dev->alloc_block > 0)
++		n += (dev->param.chunks_per_block - dev->alloc_page);
+ 
+-	obj->objectId = cp->objectId;
++	return n;
+ 
+-	if (cp->parentId)
+-		parent = yaffs_FindOrCreateObjectByNumber(
+-					obj->myDev,
+-					cp->parentId,
+-					YAFFS_OBJECT_TYPE_DIRECTORY);
+-	else
+-		parent = NULL;
++}
+ 
+-	if (parent) {
+-		if (parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
+-			T(YAFFS_TRACE_ALWAYS, (TSTR("Checkpoint read object %d parent %d type %d"
+-				TCONT(" chunk %d Parent type, %d, not directory")
+-				TENDSTR),
+-				cp->objectId, cp->parentId, cp->variantType,
+-				cp->hdrChunk, parent->variantType));
+-			return 0;
++/*
++ * yaffs_skip_rest_of_block() skips over the rest of the allocation block
++ * if we don't want to write to it.
++ */
++void yaffs_skip_rest_of_block(yaffs_dev_t *dev)
++{
++	if(dev->alloc_block > 0){
++		yaffs_block_info_t *bi = yaffs_get_block_info(dev, dev->alloc_block);
++		if(bi->block_state == YAFFS_BLOCK_STATE_ALLOCATING){
++			bi->block_state = YAFFS_BLOCK_STATE_FULL;
++			dev->alloc_block = -1;
+ 		}
+-		yaffs_AddObjectToDirectory(parent, obj);
+ 	}
+-
+-	obj->hdrChunk = cp->hdrChunk;
+-	obj->variantType = cp->variantType;
+-	obj->deleted = cp->deleted;
+-	obj->softDeleted = cp->softDeleted;
+-	obj->unlinked = cp->unlinked;
+-	obj->fake = cp->fake;
+-	obj->renameAllowed = cp->renameAllowed;
+-	obj->unlinkAllowed = cp->unlinkAllowed;
+-	obj->serial = cp->serial;
+-	obj->nDataChunks = cp->nDataChunks;
+-
+-	if (obj->variantType == YAFFS_OBJECT_TYPE_FILE)
+-		obj->variant.fileVariant.fileSize = cp->fileSizeOrEquivalentObjectId;
+-	else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK)
+-		obj->variant.hardLinkVariant.equivalentObjectId = cp->fileSizeOrEquivalentObjectId;
+-
+-	if (obj->hdrChunk > 0)
+-		obj->lazyLoaded = 1;
+-	return 1;
+ }
+ 
+ 
+-
+-static int yaffs_CheckpointTnodeWorker(yaffs_Object *in, yaffs_Tnode *tn,
+-					__u32 level, int chunkOffset)
++static int yaffs_gc_block(yaffs_dev_t *dev, int block,
++		int wholeBlock)
+ {
++	int oldChunk;
++	int newChunk;
++	int mark_flash;
++	int retVal = YAFFS_OK;
+ 	int i;
+-	yaffs_Device *dev = in->myDev;
+-	int ok = 1;
+-	int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
+-
+-	if (tnodeSize < sizeof(yaffs_Tnode))
+-		tnodeSize = sizeof(yaffs_Tnode);
++	int isCheckpointBlock;
++	int matchingChunk;
++	int maxCopies;
+ 
++	int chunksBefore = yaffs_get_erased_chunks(dev);
++	int chunksAfter;
+ 
+-	if (tn) {
+-		if (level > 0) {
++	yaffs_ext_tags tags;
+ 
+-			for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) {
+-				if (tn->internal[i]) {
+-					ok = yaffs_CheckpointTnodeWorker(in,
+-							tn->internal[i],
+-							level - 1,
+-							(chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i);
+-				}
+-			}
+-		} else if (level == 0) {
+-			__u32 baseOffset = chunkOffset <<  YAFFS_TNODES_LEVEL0_BITS;
+-			ok = (yaffs_CheckpointWrite(dev, &baseOffset, sizeof(baseOffset)) == sizeof(baseOffset));
+-			if (ok)
+-				ok = (yaffs_CheckpointWrite(dev, tn, tnodeSize) == tnodeSize);
+-		}
+-	}
++	yaffs_block_info_t *bi = yaffs_get_block_info(dev, block);
+ 
+-	return ok;
++	yaffs_obj_t *object;
+ 
+-}
++	isCheckpointBlock = (bi->block_state == YAFFS_BLOCK_STATE_CHECKPOINT);
+ 
+-static int yaffs_WriteCheckpointTnodes(yaffs_Object *obj)
+-{
+-	__u32 endMarker = ~0;
+-	int ok = 1;
+ 
+-	if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) {
+-		ok = yaffs_CheckpointTnodeWorker(obj,
+-					    obj->variant.fileVariant.top,
+-					    obj->variant.fileVariant.topLevel,
+-					    0);
+-		if (ok)
+-			ok = (yaffs_CheckpointWrite(obj->myDev, &endMarker, sizeof(endMarker)) ==
+-				sizeof(endMarker));
+-	}
++	T(YAFFS_TRACE_TRACING,
++			(TSTR("Collecting block %d, in use %d, shrink %d, wholeBlock %d" TENDSTR),
++			 block,
++			 bi->pages_in_use,
++			 bi->has_shrink_hdr,
++			 wholeBlock));
+ 
+-	return ok ? 1 : 0;
+-}
++	/*yaffs_verify_free_chunks(dev); */
+ 
+-static int yaffs_ReadCheckpointTnodes(yaffs_Object *obj)
+-{
+-	__u32 baseChunk;
+-	int ok = 1;
+-	yaffs_Device *dev = obj->myDev;
+-	yaffs_FileStructure *fileStructPtr = &obj->variant.fileVariant;
+-	yaffs_Tnode *tn;
+-	int nread = 0;
+-	int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
++	if(bi->block_state == YAFFS_BLOCK_STATE_FULL)
++		bi->block_state = YAFFS_BLOCK_STATE_COLLECTING;
++	
++	bi->has_shrink_hdr = 0;	/* clear the flag so that the block can erase */
+ 
+-	if (tnodeSize < sizeof(yaffs_Tnode))
+-		tnodeSize = sizeof(yaffs_Tnode);
++	dev->gc_disable = 1;
+ 
+-	ok = (yaffs_CheckpointRead(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk));
++	if (isCheckpointBlock ||
++			!yaffs_still_some_chunks(dev, block)) {
++		T(YAFFS_TRACE_TRACING,
++				(TSTR
++				 ("Collecting block %d that has no chunks in use" TENDSTR),
++				 block));
++		yaffs_block_became_dirty(dev, block);
++	} else {
+ 
+-	while (ok && (~baseChunk)) {
+-		nread++;
+-		/* Read level 0 tnode */
++		__u8 *buffer = yaffs_get_temp_buffer(dev, __LINE__);
+ 
++		yaffs_verify_blk(dev, bi, block);
+ 
+-		tn = yaffs_GetTnodeRaw(dev);
+-		if (tn)
+-			ok = (yaffs_CheckpointRead(dev, tn, tnodeSize) == tnodeSize);
+-		else
+-			ok = 0;
++		maxCopies = (wholeBlock) ? dev->param.chunks_per_block : 5;
++		oldChunk = block * dev->param.chunks_per_block + dev->gc_chunk;
+ 
+-		if (tn && ok)
+-			ok = yaffs_AddOrFindLevel0Tnode(dev,
+-							fileStructPtr,
+-							baseChunk,
+-							tn) ? 1 : 0;
++		for (/* init already done */;
++		     retVal == YAFFS_OK &&
++		     dev->gc_chunk < dev->param.chunks_per_block &&
++		     (bi->block_state == YAFFS_BLOCK_STATE_COLLECTING) &&
++		     maxCopies > 0;
++		     dev->gc_chunk++, oldChunk++) {
++			if (yaffs_check_chunk_bit(dev, block, dev->gc_chunk)) {
+ 
+-		if (ok)
+-			ok = (yaffs_CheckpointRead(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk));
++				/* This page is in use and might need to be copied off */
+ 
+-	}
++				maxCopies--;
+ 
+-	T(YAFFS_TRACE_CHECKPOINT, (
+-		TSTR("Checkpoint read tnodes %d records, last %d. ok %d" TENDSTR),
+-		nread, baseChunk, ok));
++				mark_flash = 1;
+ 
+-	return ok ? 1 : 0;
+-}
++				yaffs_init_tags(&tags);
+ 
++				yaffs_rd_chunk_tags_nand(dev, oldChunk,
++								buffer, &tags);
+ 
+-static int yaffs_WriteCheckpointObjects(yaffs_Device *dev)
+-{
+-	yaffs_Object *obj;
+-	yaffs_CheckpointObject cp;
+-	int i;
+-	int ok = 1;
+-	struct ylist_head *lh;
++				object =
++				    yaffs_find_by_number(dev,
++							     tags.obj_id);
+ 
++				T(YAFFS_TRACE_GC_DETAIL,
++				  (TSTR
++				   ("Collecting chunk in block %d, %d %d %d " TENDSTR),
++				   dev->gc_chunk, tags.obj_id, tags.chunk_id,
++				   tags.n_bytes));
+ 
+-	/* Iterate through the objects in each hash entry,
+-	 * dumping them to the checkpointing stream.
+-	 */
++				if (object && !yaffs_skip_verification(dev)) {
++					if (tags.chunk_id == 0)
++						matchingChunk = object->hdr_chunk;
++					else if (object->soft_del)
++						matchingChunk = oldChunk; /* Defeat the test */
++					else
++						matchingChunk = yaffs_find_chunk_in_file(object, tags.chunk_id, NULL);
+ 
+-	for (i = 0; ok &&  i <  YAFFS_NOBJECT_BUCKETS; i++) {
+-		ylist_for_each(lh, &dev->objectBucket[i].list) {
+-			if (lh) {
+-				obj = ylist_entry(lh, yaffs_Object, hashLink);
+-				if (!obj->deferedFree) {
+-					yaffs_ObjectToCheckpointObject(&cp, obj);
+-					cp.structType = sizeof(cp);
+-
+-					T(YAFFS_TRACE_CHECKPOINT, (
+-						TSTR("Checkpoint write object %d parent %d type %d chunk %d obj addr %x" TENDSTR),
+-						cp.objectId, cp.parentId, cp.variantType, cp.hdrChunk, (unsigned) obj));
++					if (oldChunk != matchingChunk)
++						T(YAFFS_TRACE_ERROR,
++						  (TSTR("gc: page in gc mismatch: %d %d %d %d"TENDSTR),
++						  oldChunk, matchingChunk, tags.obj_id, tags.chunk_id));
+ 
+-					ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
++				}
+ 
+-					if (ok && obj->variantType == YAFFS_OBJECT_TYPE_FILE)
+-						ok = yaffs_WriteCheckpointTnodes(obj);
++				if (!object) {
++					T(YAFFS_TRACE_ERROR,
++					  (TSTR
++					   ("page %d in gc has no object: %d %d %d "
++					    TENDSTR), oldChunk,
++					    tags.obj_id, tags.chunk_id, tags.n_bytes));
+ 				}
+-			}
+-		}
+-	}
+ 
+-	/* Dump end of list */
+-	memset(&cp, 0xFF, sizeof(yaffs_CheckpointObject));
+-	cp.structType = sizeof(cp);
++				if (object &&
++				    object->deleted &&
++				    object->soft_del &&
++				    tags.chunk_id != 0) {
++					/* Data chunk in a soft deleted file, throw it away
++					 * It's a soft deleted data chunk,
++					 * No need to copy this, just forget about it and
++					 * fix up the object.
++					 */
++					 
++					/* Free chunks already includes softdeleted chunks.
++					 * How ever this chunk is going to soon be really deleted
++					 * which will increment free chunks.
++					 * We have to decrement free chunks so this works out properly.
++					 */
++					dev->n_free_chunks--;
++					bi->soft_del_pages--;
++
++					object->n_data_chunks--;
+ 
+-	if (ok)
+-		ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
++					if (object->n_data_chunks <= 0) {
++						/* remeber to clean up the object */
++						dev->gc_cleanup_list[dev->n_clean_ups] =
++						    tags.obj_id;
++						dev->n_clean_ups++;
++					}
++					mark_flash = 0;
++				} else if (0) {
++					/* Todo object && object->deleted && object->n_data_chunks == 0 */
++					/* Deleted object header with no data chunks.
++					 * Can be discarded and the file deleted.
++					 */
++					object->hdr_chunk = 0;
++					yaffs_free_tnode(object->my_dev,
++							object->variant.
++							file_variant.top);
++					object->variant.file_variant.top = NULL;
++					yaffs_generic_obj_del(object);
+ 
+-	return ok ? 1 : 0;
+-}
++				} else if (object) {
++					/* It's either a data chunk in a live file or
++					 * an ObjectHeader, so we're interested in it.
++					 * NB Need to keep the ObjectHeaders of deleted files
++					 * until the whole file has been deleted off
++					 */
++					tags.serial_number++;
+ 
+-static int yaffs_ReadCheckpointObjects(yaffs_Device *dev)
+-{
+-	yaffs_Object *obj;
+-	yaffs_CheckpointObject cp;
+-	int ok = 1;
+-	int done = 0;
+-	yaffs_Object *hardList = NULL;
++					dev->n_gc_copies++;
+ 
+-	while (ok && !done) {
+-		ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
+-		if (cp.structType != sizeof(cp)) {
+-			T(YAFFS_TRACE_CHECKPOINT, (TSTR("struct size %d instead of %d ok %d"TENDSTR),
+-				cp.structType, sizeof(cp), ok));
+-			ok = 0;
+-		}
+-
+-		T(YAFFS_TRACE_CHECKPOINT, (TSTR("Checkpoint read object %d parent %d type %d chunk %d " TENDSTR),
+-			cp.objectId, cp.parentId, cp.variantType, cp.hdrChunk));
+-
+-		if (ok && cp.objectId == ~0)
+-			done = 1;
+-		else if (ok) {
+-			obj = yaffs_FindOrCreateObjectByNumber(dev, cp.objectId, cp.variantType);
+-			if (obj) {
+-				ok = yaffs_CheckpointObjectToObject(obj, &cp);
+-				if (!ok)
+-					break;
+-				if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) {
+-					ok = yaffs_ReadCheckpointTnodes(obj);
+-				} else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
+-					obj->hardLinks.next =
+-						(struct ylist_head *) hardList;
+-					hardList = obj;
+-				}
+-			} else
+-				ok = 0;
+-		}
+-	}
++					if (tags.chunk_id == 0) {
++						/* It is an object Id,
++						 * We need to nuke the shrinkheader flags first
++						 * Also need to clean up shadowing.
++						 * We no longer want the shrinkHeader flag since its work is done
++						 * and if it is left in place it will mess up scanning.
++						 */
+ 
+-	if (ok)
+-		yaffs_HardlinkFixup(dev, hardList);
++						yaffs_obj_header *oh;
++						oh = (yaffs_obj_header *)buffer;
+ 
+-	return ok ? 1 : 0;
+-}
++						oh->is_shrink = 0;
++						tags.extra_is_shrink = 0;
+ 
+-static int yaffs_WriteCheckpointSum(yaffs_Device *dev)
+-{
+-	__u32 checkpointSum;
+-	int ok;
++						oh->shadows_obj = 0;
++						oh->inband_shadowed_obj_id = 0;
++						tags.extra_shadows = 0;
++
++						/* Update file size */
++						if(object->variant_type == YAFFS_OBJECT_TYPE_FILE){
++							oh->file_size = object->variant.file_variant.file_size;
++							tags.extra_length = oh->file_size;
++						}
++
++						yaffs_verify_oh(object, oh, &tags, 1);
++						newChunk =
++						    yaffs_write_new_chunk(dev,(__u8 *) oh, &tags, 1);
++					} else
++						newChunk =
++						    yaffs_write_new_chunk(dev, buffer, &tags, 1);
++
++					if (newChunk < 0) {
++						retVal = YAFFS_FAIL;
++					} else {
+ 
+-	yaffs_GetCheckpointSum(dev, &checkpointSum);
++						/* Ok, now fix up the Tnodes etc. */
+ 
+-	ok = (yaffs_CheckpointWrite(dev, &checkpointSum, sizeof(checkpointSum)) == sizeof(checkpointSum));
++						if (tags.chunk_id == 0) {
++							/* It's a header */
++							object->hdr_chunk =  newChunk;
++							object->serial =   tags.serial_number;
++						} else {
++							/* It's a data chunk */
++							int ok;
++							ok = yaffs_put_chunk_in_file
++							    (object,
++							     tags.chunk_id,
++							     newChunk, 0);
++						}
++					}
++				}
+ 
+-	if (!ok)
+-		return 0;
++				if (retVal == YAFFS_OK)
++					yaffs_chunk_del(dev, oldChunk, mark_flash, __LINE__);
+ 
+-	return 1;
+-}
++			}
++		}
+ 
+-static int yaffs_ReadCheckpointSum(yaffs_Device *dev)
+-{
+-	__u32 checkpointSum0;
+-	__u32 checkpointSum1;
+-	int ok;
++		yaffs_release_temp_buffer(dev, buffer, __LINE__);
+ 
+-	yaffs_GetCheckpointSum(dev, &checkpointSum0);
+ 
+-	ok = (yaffs_CheckpointRead(dev, &checkpointSum1, sizeof(checkpointSum1)) == sizeof(checkpointSum1));
+ 
+-	if (!ok)
+-		return 0;
++	}
+ 
+-	if (checkpointSum0 != checkpointSum1)
+-		return 0;
++	yaffs_verify_collected_blk(dev, bi, block);
+ 
+-	return 1;
+-}
+ 
+ 
+-static int yaffs_WriteCheckpointData(yaffs_Device *dev)
+-{
+-	int ok = 1;
++	if (bi->block_state == YAFFS_BLOCK_STATE_COLLECTING) {
++		/*
++		 * The gc did not complete. Set block state back to FULL
++		 * because checkpointing does not restore gc.
++		 */
++		bi->block_state = YAFFS_BLOCK_STATE_FULL;
++	} else {
++		/* The gc completed. */
++		/* Do any required cleanups */
++		for (i = 0; i < dev->n_clean_ups; i++) {
++			/* Time to delete the file too */
++			object =
++			    yaffs_find_by_number(dev,
++						     dev->gc_cleanup_list[i]);
++			if (object) {
++				yaffs_free_tnode(dev,
++						object->variant.file_variant.
++						top);
++				object->variant.file_variant.top = NULL;
++				T(YAFFS_TRACE_GC,
++				  (TSTR
++				   ("yaffs: About to finally delete object %d"
++				    TENDSTR), object->obj_id));
++				yaffs_generic_obj_del(object);
++				object->my_dev->n_deleted_files--;
++			}
+ 
+-	if (dev->skipCheckpointWrite || !dev->isYaffs2) {
+-		T(YAFFS_TRACE_CHECKPOINT, (TSTR("skipping checkpoint write" TENDSTR)));
+-		ok = 0;
+-	}
++		}
+ 
+-	if (ok)
+-		ok = yaffs_CheckpointOpen(dev, 1);
+ 
+-	if (ok) {
+-		T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint validity" TENDSTR)));
+-		ok = yaffs_WriteCheckpointValidityMarker(dev, 1);
+-	}
+-	if (ok) {
+-		T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint device" TENDSTR)));
+-		ok = yaffs_WriteCheckpointDevice(dev);
+-	}
+-	if (ok) {
+-		T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint objects" TENDSTR)));
+-		ok = yaffs_WriteCheckpointObjects(dev);
+-	}
+-	if (ok) {
+-		T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint validity" TENDSTR)));
+-		ok = yaffs_WriteCheckpointValidityMarker(dev, 0);
++		chunksAfter = yaffs_get_erased_chunks(dev);
++		if (chunksBefore >= chunksAfter) {
++			T(YAFFS_TRACE_GC,
++			  (TSTR
++			   ("gc did not increase free chunks before %d after %d"
++			    TENDSTR), chunksBefore, chunksAfter));
++		}
++		dev->gc_block = 0;
++		dev->gc_chunk = 0;
++		dev->n_clean_ups = 0;
+ 	}
+ 
+-	if (ok)
+-		ok = yaffs_WriteCheckpointSum(dev);
+-
+-	if (!yaffs_CheckpointClose(dev))
+-		ok = 0;
+-
+-	if (ok)
+-		dev->isCheckpointed = 1;
+-	else
+-		dev->isCheckpointed = 0;
++	dev->gc_disable = 0;
+ 
+-	return dev->isCheckpointed;
++	return retVal;
+ }
+ 
+-static int yaffs_ReadCheckpointData(yaffs_Device *dev)
++/*
++ * FindBlockForgarbageCollection is used to select the dirtiest block (or close enough)
++ * for garbage collection.
++ */
++
++static unsigned yaffs_find_gc_block(yaffs_dev_t *dev,
++					int aggressive,
++					int background)
+ {
+-	int ok = 1;
++	int i;
++	int iterations;
++	unsigned selected = 0;
++	int prioritised = 0;
++	int prioritisedExists = 0;
++	yaffs_block_info_t *bi;
++	int threshold;
+ 
+-	if (dev->skipCheckpointRead || !dev->isYaffs2) {
+-		T(YAFFS_TRACE_CHECKPOINT, (TSTR("skipping checkpoint read" TENDSTR)));
+-		ok = 0;
+-	}
++	/* First let's see if we need to grab a prioritised block */
++	if (dev->has_pending_prioritised_gc && !aggressive) {
++		dev->gc_dirtiest = 0;
++		bi = dev->block_info;
++		for (i = dev->internal_start_block;
++			i <= dev->internal_end_block && !selected;
++			i++) {
++
++			if (bi->gc_prioritise) {
++				prioritisedExists = 1;
++				if (bi->block_state == YAFFS_BLOCK_STATE_FULL &&
++				   yaffs_block_ok_for_gc(dev, bi)) {
++					selected = i;
++					prioritised = 1;
++				}
++			}
++			bi++;
++		}
+ 
+-	if (ok)
+-		ok = yaffs_CheckpointOpen(dev, 0); /* open for read */
++		/*
++		 * If there is a prioritised block and none was selected then
++		 * this happened because there is at least one old dirty block gumming
++		 * up the works. Let's gc the oldest dirty block.
++		 */
+ 
+-	if (ok) {
+-		T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint validity" TENDSTR)));
+-		ok = yaffs_ReadCheckpointValidityMarker(dev, 1);
+-	}
+-	if (ok) {
+-		T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint device" TENDSTR)));
+-		ok = yaffs_ReadCheckpointDevice(dev);
+-	}
+-	if (ok) {
+-		T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint objects" TENDSTR)));
+-		ok = yaffs_ReadCheckpointObjects(dev);
+-	}
+-	if (ok) {
+-		T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint validity" TENDSTR)));
+-		ok = yaffs_ReadCheckpointValidityMarker(dev, 0);
+-	}
++		if(prioritisedExists &&
++			!selected &&
++			dev->oldest_dirty_block > 0)
++			selected = dev->oldest_dirty_block;
+ 
+-	if (ok) {
+-		ok = yaffs_ReadCheckpointSum(dev);
+-		T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint checksum %d" TENDSTR), ok));
++		if (!prioritisedExists) /* None found, so we can clear this */
++			dev->has_pending_prioritised_gc = 0;
+ 	}
+ 
+-	if (!yaffs_CheckpointClose(dev))
+-		ok = 0;
+-
+-	if (ok)
+-		dev->isCheckpointed = 1;
+-	else
+-		dev->isCheckpointed = 0;
+-
+-	return ok ? 1 : 0;
++	/* If we're doing aggressive GC then we are happy to take a less-dirty block, and
++	 * search harder.
++	 * else (we're doing a leasurely gc), then we only bother to do this if the
++	 * block has only a few pages in use.
++	 */
+ 
+-}
++	if (!selected){
++		int pagesUsed;
++		int nBlocks = dev->internal_end_block - dev->internal_start_block + 1;
++		if (aggressive){
++			threshold = dev->param.chunks_per_block;
++			iterations = nBlocks;
++		} else {
++			int maxThreshold;
+ 
+-static void yaffs_InvalidateCheckpoint(yaffs_Device *dev)
+-{
+-	if (dev->isCheckpointed ||
+-			dev->blocksInCheckpoint > 0) {
+-		dev->isCheckpointed = 0;
+-		yaffs_CheckpointInvalidateStream(dev);
+-		if (dev->superBlock && dev->markSuperBlockDirty)
+-			dev->markSuperBlockDirty(dev->superBlock);
+-	}
+-}
++			if(background)
++				maxThreshold = dev->param.chunks_per_block/2;
++			else
++				maxThreshold = dev->param.chunks_per_block/8;
+ 
++			if(maxThreshold <  YAFFS_GC_PASSIVE_THRESHOLD)
++				maxThreshold = YAFFS_GC_PASSIVE_THRESHOLD;
+ 
+-int yaffs_CheckpointSave(yaffs_Device *dev)
+-{
++			threshold = background ?
++				(dev->gc_not_done + 2) * 2 : 0;
++			if(threshold <YAFFS_GC_PASSIVE_THRESHOLD)
++				threshold = YAFFS_GC_PASSIVE_THRESHOLD;
++			if(threshold > maxThreshold)
++				threshold = maxThreshold;
+ 
+-	T(YAFFS_TRACE_CHECKPOINT, (TSTR("save entry: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
++			iterations = nBlocks / 16 + 1;
++			if (iterations > 100)
++				iterations = 100;
++		}
+ 
+-	yaffs_VerifyObjects(dev);
+-	yaffs_VerifyBlocks(dev);
+-	yaffs_VerifyFreeChunks(dev);
++		for (i = 0;
++			i < iterations &&
++			(dev->gc_dirtiest < 1 ||
++				dev->gc_pages_in_use > YAFFS_GC_GOOD_ENOUGH);
++			i++) {
++			dev->gc_block_finder++;
++			if (dev->gc_block_finder < dev->internal_start_block ||
++				dev->gc_block_finder > dev->internal_end_block)
++				dev->gc_block_finder = dev->internal_start_block;
+ 
+-	if (!dev->isCheckpointed) {
+-		yaffs_InvalidateCheckpoint(dev);
+-		yaffs_WriteCheckpointData(dev);
+-	}
++			bi = yaffs_get_block_info(dev, dev->gc_block_finder);
+ 
+-	T(YAFFS_TRACE_ALWAYS, (TSTR("save exit: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
++			pagesUsed = bi->pages_in_use - bi->soft_del_pages;
+ 
+-	return dev->isCheckpointed;
+-}
++			if (bi->block_state == YAFFS_BLOCK_STATE_FULL &&
++				pagesUsed < dev->param.chunks_per_block &&
++				(dev->gc_dirtiest < 1 || pagesUsed < dev->gc_pages_in_use) &&
++				yaffs_block_ok_for_gc(dev, bi)) {
++				dev->gc_dirtiest = dev->gc_block_finder;
++				dev->gc_pages_in_use = pagesUsed;
++			}
++		}
+ 
+-int yaffs_CheckpointRestore(yaffs_Device *dev)
+-{
+-	int retval;
+-	T(YAFFS_TRACE_CHECKPOINT, (TSTR("restore entry: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
++		if(dev->gc_dirtiest > 0 && dev->gc_pages_in_use <= threshold)
++			selected = dev->gc_dirtiest;
++	}
+ 
+-	retval = yaffs_ReadCheckpointData(dev);
++	/*
++	 * If nothing has been selected for a while, try selecting the oldest dirty
++	 * because that's gumming up the works.
++	 */
+ 
+-	if (dev->isCheckpointed) {
+-		yaffs_VerifyObjects(dev);
+-		yaffs_VerifyBlocks(dev);
+-		yaffs_VerifyFreeChunks(dev);
++	if(!selected && dev->param.is_yaffs2 &&
++		dev->gc_not_done >= ( background ? 10 : 20)){
++		yaffs2_find_oldest_dirty_seq(dev);
++		if(dev->oldest_dirty_block > 0) {
++			selected = dev->oldest_dirty_block;
++			dev->gc_dirtiest = selected;
++			dev->oldest_dirty_gc_count++;
++			bi = yaffs_get_block_info(dev, selected);
++			dev->gc_pages_in_use =  bi->pages_in_use - bi->soft_del_pages;
++		} else
++			dev->gc_not_done = 0;
+ 	}
+ 
+-	T(YAFFS_TRACE_CHECKPOINT, (TSTR("restore exit: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
++	if(selected){
++		T(YAFFS_TRACE_GC,
++		  (TSTR("GC Selected block %d with %d free, prioritised:%d" TENDSTR),
++		  selected,
++		  dev->param.chunks_per_block - dev->gc_pages_in_use,
++		  prioritised));
++
++		dev->n_gc_blocks++;
++		if(background)
++			dev->bg_gcs++;
++
++		dev->gc_dirtiest = 0;
++		dev->gc_pages_in_use = 0;
++		dev->gc_not_done = 0;
++		if(dev->refresh_skip > 0)
++			dev->refresh_skip--;
++	} else{
++		dev->gc_not_done++;
++		T(YAFFS_TRACE_GC,
++		  (TSTR("GC none: finder %d skip %d threshold %d dirtiest %d using %d oldest %d%s" TENDSTR),
++		  dev->gc_block_finder, dev->gc_not_done,
++		  threshold,
++		  dev->gc_dirtiest, dev->gc_pages_in_use,
++		  dev->oldest_dirty_block,
++		  background ? " bg" : ""));
++	}
+ 
+-	return retval;
++	return selected;
+ }
+ 
+-/*--------------------- File read/write ------------------------
+- * Read and write have very similar structures.
+- * In general the read/write has three parts to it
+- * An incomplete chunk to start with (if the read/write is not chunk-aligned)
+- * Some complete chunks
+- * An incomplete chunk to end off with
++/* New garbage collector
++ * If we're very low on erased blocks then we do aggressive garbage collection
++ * otherwise we do "leasurely" garbage collection.
++ * Aggressive gc looks further (whole array) and will accept less dirty blocks.
++ * Passive gc only inspects smaller areas and will only accept more dirty blocks.
+  *
+- * Curve-balls: the first chunk might also be the last chunk.
++ * The idea is to help clear out space in a more spread-out manner.
++ * Dunno if it really does anything useful.
+  */
+-
+-int yaffs_ReadDataFromFile(yaffs_Object *in, __u8 *buffer, loff_t offset,
+-			int nBytes)
++static int yaffs_check_gc(yaffs_dev_t *dev, int background)
+ {
++	int aggressive = 0;
++	int gcOk = YAFFS_OK;
++	int maxTries = 0;
++	int minErased;
++	int erasedChunks;
++	int checkpointBlockAdjust;
+ 
+-	int chunk;
+-	__u32 start;
+-	int nToCopy;
+-	int n = nBytes;
+-	int nDone = 0;
+-	yaffs_ChunkCache *cache;
+-
+-	yaffs_Device *dev;
+-
+-	dev = in->myDev;
+-
+-	while (n > 0) {
+-		/* chunk = offset / dev->nDataBytesPerChunk + 1; */
+-		/* start = offset % dev->nDataBytesPerChunk; */
+-		yaffs_AddrToChunk(dev, offset, &chunk, &start);
+-		chunk++;
+-
+-		/* OK now check for the curveball where the start and end are in
+-		 * the same chunk.
+-		 */
+-		if ((start + n) < dev->nDataBytesPerChunk)
+-			nToCopy = n;
+-		else
+-			nToCopy = dev->nDataBytesPerChunk - start;
+-
+-		cache = yaffs_FindChunkCache(in, chunk);
+-
+-		/* If the chunk is already in the cache or it is less than a whole chunk
+-		 * or we're using inband tags then use the cache (if there is caching)
+-		 * else bypass the cache.
+-		 */
+-		if (cache || nToCopy != dev->nDataBytesPerChunk || dev->inbandTags) {
+-			if (dev->nShortOpCaches > 0) {
+-
+-				/* If we can't find the data in the cache, then load it up. */
++	if(dev->param.gc_control &&
++		(dev->param.gc_control(dev) & 1) == 0)
++		return YAFFS_OK;
+ 
+-				if (!cache) {
+-					cache = yaffs_GrabChunkCache(in->myDev);
+-					cache->object = in;
+-					cache->chunkId = chunk;
+-					cache->dirty = 0;
+-					cache->locked = 0;
+-					yaffs_ReadChunkDataFromObject(in, chunk,
+-								      cache->
+-								      data);
+-					cache->nBytes = 0;
+-				}
++	if (dev->gc_disable) {
++		/* Bail out so we don't get recursive gc */
++		return YAFFS_OK;
++	}
+ 
+-				yaffs_UseChunkCache(dev, cache, 0);
++	/* This loop should pass the first time.
++	 * We'll only see looping here if the collection does not increase space.
++	 */
+ 
+-				cache->locked = 1;
++	do {
++		maxTries++;
+ 
++		checkpointBlockAdjust = yaffs_calc_checkpt_blocks_required(dev);
+ 
+-				memcpy(buffer, &cache->data[start], nToCopy);
++		minErased  = dev->param.n_reserved_blocks + checkpointBlockAdjust + 1;
++		erasedChunks = dev->n_erased_blocks * dev->param.chunks_per_block;
+ 
+-				cache->locked = 0;
+-			} else {
+-				/* Read into the local buffer then copy..*/
++		/* If we need a block soon then do aggressive gc.*/
++		if (dev->n_erased_blocks < minErased)
++			aggressive = 1;
++		else {
++			if(!background && erasedChunks > (dev->n_free_chunks / 4))
++				break;
+ 
+-				__u8 *localBuffer =
+-				    yaffs_GetTempBuffer(dev, __LINE__);
+-				yaffs_ReadChunkDataFromObject(in, chunk,
+-							      localBuffer);
++			if(dev->gc_skip > 20)
++				dev->gc_skip = 20;
++			if(erasedChunks < dev->n_free_chunks/2 ||
++				dev->gc_skip < 1 ||
++				background)
++				aggressive = 0;
++			else {
++				dev->gc_skip--;
++				break;
++			}
++		}
+ 
+-				memcpy(buffer, &localBuffer[start], nToCopy);
++		dev->gc_skip = 5;
+ 
++                /* If we don't already have a block being gc'd then see if we should start another */
+ 
+-				yaffs_ReleaseTempBuffer(dev, localBuffer,
+-							__LINE__);
+-			}
++		if (dev->gc_block < 1 && !aggressive) {
++			dev->gc_block = yaffs2_find_refresh_block(dev);
++			dev->gc_chunk = 0;
++			dev->n_clean_ups=0;
++		}
++		if (dev->gc_block < 1) {
++			dev->gc_block = yaffs_find_gc_block(dev, aggressive, background);
++			dev->gc_chunk = 0;
++			dev->n_clean_ups=0;
++		}
+ 
+-		} else {
++		if (dev->gc_block > 0) {
++			dev->all_gcs++;
++			if (!aggressive)
++				dev->passive_gc_count++;
+ 
+-			/* A full chunk. Read directly into the supplied buffer. */
+-			yaffs_ReadChunkDataFromObject(in, chunk, buffer);
++			T(YAFFS_TRACE_GC,
++			  (TSTR
++			   ("yaffs: GC erasedBlocks %d aggressive %d" TENDSTR),
++			   dev->n_erased_blocks, aggressive));
+ 
++			gcOk = yaffs_gc_block(dev, dev->gc_block, aggressive);
+ 		}
+ 
+-		n -= nToCopy;
+-		offset += nToCopy;
+-		buffer += nToCopy;
+-		nDone += nToCopy;
+-
+-	}
++		if (dev->n_erased_blocks < (dev->param.n_reserved_blocks) && dev->gc_block > 0) {
++			T(YAFFS_TRACE_GC,
++			  (TSTR
++			   ("yaffs: GC !!!no reclaim!!! erasedBlocks %d after try %d block %d"
++			    TENDSTR), dev->n_erased_blocks, maxTries, dev->gc_block));
++		}
++	} while ((dev->n_erased_blocks < dev->param.n_reserved_blocks) &&
++		 (dev->gc_block > 0) &&
++		 (maxTries < 2));
+ 
+-	return nDone;
++	return aggressive ? gcOk : YAFFS_OK;
+ }
+ 
+-int yaffs_WriteDataToFile(yaffs_Object *in, const __u8 *buffer, loff_t offset,
+-			int nBytes, int writeThrough)
++/*
++ * yaffs_bg_gc()
++ * Garbage collects. Intended to be called from a background thread.
++ * Returns non-zero if at least half the free chunks are erased.
++ */
++int yaffs_bg_gc(yaffs_dev_t *dev, unsigned urgency)
+ {
++	int erasedChunks = dev->n_erased_blocks * dev->param.chunks_per_block;
+ 
+-	int chunk;
+-	__u32 start;
+-	int nToCopy;
+-	int n = nBytes;
+-	int nDone = 0;
+-	int nToWriteBack;
+-	int startOfWrite = offset;
+-	int chunkWritten = 0;
+-	__u32 nBytesRead;
+-	__u32 chunkStart;
++	T(YAFFS_TRACE_BACKGROUND, (TSTR("Background gc %u" TENDSTR),urgency));
+ 
+-	yaffs_Device *dev;
++	yaffs_check_gc(dev, 1);
++	return erasedChunks > dev->n_free_chunks/2;
++}
+ 
+-	dev = in->myDev;
++/*-------------------------  TAGS --------------------------------*/
+ 
+-	while (n > 0 && chunkWritten >= 0) {
+-		/* chunk = offset / dev->nDataBytesPerChunk + 1; */
+-		/* start = offset % dev->nDataBytesPerChunk; */
+-		yaffs_AddrToChunk(dev, offset, &chunk, &start);
++static int yaffs_tags_match(const yaffs_ext_tags *tags, int obj_id,
++			   int chunkInObject)
++{
++	return (tags->chunk_id == chunkInObject &&
++		tags->obj_id == obj_id && !tags->is_deleted) ? 1 : 0;
+ 
+-		if (chunk * dev->nDataBytesPerChunk + start != offset ||
+-				start >= dev->nDataBytesPerChunk) {
+-			T(YAFFS_TRACE_ERROR, (
+-			   TSTR("AddrToChunk of offset %d gives chunk %d start %d"
+-			   TENDSTR),
+-			   (int)offset, chunk, start));
+-		}
+-		chunk++;
++}
+ 
+-		/* OK now check for the curveball where the start and end are in
+-		 * the same chunk.
+-		 */
+ 
+-		if ((start + n) < dev->nDataBytesPerChunk) {
+-			nToCopy = n;
++/*-------------------- Data file manipulation -----------------*/
+ 
+-			/* Now folks, to calculate how many bytes to write back....
+-			 * If we're overwriting and not writing to then end of file then
+-			 * we need to write back as much as was there before.
+-			 */
++static int yaffs_find_chunk_in_file(yaffs_obj_t *in, int inode_chunk,
++				 yaffs_ext_tags *tags)
++{
++	/*Get the Tnode, then get the level 0 offset chunk offset */
++	yaffs_tnode_t *tn;
++	int theChunk = -1;
++	yaffs_ext_tags localTags;
++	int retVal = -1;
+ 
+-			chunkStart = ((chunk - 1) * dev->nDataBytesPerChunk);
++	yaffs_dev_t *dev = in->my_dev;
+ 
+-			if (chunkStart > in->variant.fileVariant.fileSize)
+-				nBytesRead = 0; /* Past end of file */
+-			else
+-				nBytesRead = in->variant.fileVariant.fileSize - chunkStart;
++	if (!tags) {
++		/* Passed a NULL, so use our own tags space */
++		tags = &localTags;
++	}
+ 
+-			if (nBytesRead > dev->nDataBytesPerChunk)
+-				nBytesRead = dev->nDataBytesPerChunk;
++	tn = yaffs_find_tnode_0(dev, &in->variant.file_variant, inode_chunk);
+ 
+-			nToWriteBack =
+-			    (nBytesRead >
+-			     (start + n)) ? nBytesRead : (start + n);
++	if (tn) {
++		theChunk = yaffs_get_group_base(dev, tn, inode_chunk);
+ 
+-			if (nToWriteBack < 0 || nToWriteBack > dev->nDataBytesPerChunk)
+-				YBUG();
++		retVal =
++		    yaffs_find_chunk_in_group(dev, theChunk, tags, in->obj_id,
++					   inode_chunk);
++	}
++	return retVal;
++}
+ 
+-		} else {
+-			nToCopy = dev->nDataBytesPerChunk - start;
+-			nToWriteBack = dev->nDataBytesPerChunk;
+-		}
++static int yaffs_find_del_file_chunk(yaffs_obj_t *in, int inode_chunk,
++					  yaffs_ext_tags *tags)
++{
++	/* Get the Tnode, then get the level 0 offset chunk offset */
++	yaffs_tnode_t *tn;
++	int theChunk = -1;
++	yaffs_ext_tags localTags;
+ 
+-		if (nToCopy != dev->nDataBytesPerChunk || dev->inbandTags) {
+-			/* An incomplete start or end chunk (or maybe both start and end chunk),
+-			 * or we're using inband tags, so we want to use the cache buffers.
+-			 */
+-			if (dev->nShortOpCaches > 0) {
+-				yaffs_ChunkCache *cache;
+-				/* If we can't find the data in the cache, then load the cache */
+-				cache = yaffs_FindChunkCache(in, chunk);
++	yaffs_dev_t *dev = in->my_dev;
++	int retVal = -1;
+ 
+-				if (!cache
+-				    && yaffs_CheckSpaceForAllocation(in->
+-								     myDev)) {
+-					cache = yaffs_GrabChunkCache(in->myDev);
+-					cache->object = in;
+-					cache->chunkId = chunk;
+-					cache->dirty = 0;
+-					cache->locked = 0;
+-					yaffs_ReadChunkDataFromObject(in, chunk,
+-								      cache->
+-								      data);
+-				} else if (cache &&
+-					!cache->dirty &&
+-					!yaffs_CheckSpaceForAllocation(in->myDev)) {
+-					/* Drop the cache if it was a read cache item and
+-					 * no space check has been made for it.
+-					 */
+-					 cache = NULL;
+-				}
++	if (!tags) {
++		/* Passed a NULL, so use our own tags space */
++		tags = &localTags;
++	}
+ 
+-				if (cache) {
+-					yaffs_UseChunkCache(dev, cache, 1);
+-					cache->locked = 1;
++	tn = yaffs_find_tnode_0(dev, &in->variant.file_variant, inode_chunk);
+ 
++	if (tn) {
+ 
+-					memcpy(&cache->data[start], buffer,
+-					       nToCopy);
++		theChunk = yaffs_get_group_base(dev, tn, inode_chunk);
+ 
++		retVal =
++		    yaffs_find_chunk_in_group(dev, theChunk, tags, in->obj_id,
++					   inode_chunk);
+ 
+-					cache->locked = 0;
+-					cache->nBytes = nToWriteBack;
++		/* Delete the entry in the filestructure (if found) */
++		if (retVal != -1)
++			yaffs_load_tnode_0(dev, tn, inode_chunk, 0);
++	}
+ 
+-					if (writeThrough) {
+-						chunkWritten =
+-						    yaffs_WriteChunkDataToObject
+-						    (cache->object,
+-						     cache->chunkId,
+-						     cache->data, cache->nBytes,
+-						     1);
+-						cache->dirty = 0;
+-					}
++	return retVal;
++}
+ 
+-				} else {
+-					chunkWritten = -1;	/* fail the write */
+-				}
+-			} else {
+-				/* An incomplete start or end chunk (or maybe both start and end chunk)
+-				 * Read into the local buffer then copy, then copy over and write back.
+-				 */
+ 
+-				__u8 *localBuffer =
+-				    yaffs_GetTempBuffer(dev, __LINE__);
++int yaffs_put_chunk_in_file(yaffs_obj_t *in, int inode_chunk,
++			        int nand_chunk, int in_scan)
++{
++	/* NB in_scan is zero unless scanning.
++	 * For forward scanning, in_scan is > 0;
++	 * for backward scanning in_scan is < 0
++	 *
++	 * nand_chunk = 0 is a dummy insert to make sure the tnodes are there.
++	 */
+ 
+-				yaffs_ReadChunkDataFromObject(in, chunk,
+-							      localBuffer);
++	yaffs_tnode_t *tn;
++	yaffs_dev_t *dev = in->my_dev;
++	int existingChunk;
++	yaffs_ext_tags existingTags;
++	yaffs_ext_tags newTags;
++	unsigned existingSerial, newSerial;
+ 
++	if (in->variant_type != YAFFS_OBJECT_TYPE_FILE) {
++		/* Just ignore an attempt at putting a chunk into a non-file during scanning
++		 * If it is not during Scanning then something went wrong!
++		 */
++		if (!in_scan) {
++			T(YAFFS_TRACE_ERROR,
++			  (TSTR
++			   ("yaffs tragedy:attempt to put data chunk into a non-file"
++			    TENDSTR)));
++			YBUG();
++		}
+ 
++		yaffs_chunk_del(dev, nand_chunk, 1, __LINE__);
++		return YAFFS_OK;
++	}
+ 
+-				memcpy(&localBuffer[start], buffer, nToCopy);
++	tn = yaffs_add_find_tnode_0(dev,
++					&in->variant.file_variant,
++					inode_chunk,
++					NULL);
++	if (!tn)
++		return YAFFS_FAIL;
++	
++	if(!nand_chunk)
++		/* Dummy insert, bail now */
++		return YAFFS_OK;
+ 
+-				chunkWritten =
+-				    yaffs_WriteChunkDataToObject(in, chunk,
+-								 localBuffer,
+-								 nToWriteBack,
+-								 0);
++	existingChunk = yaffs_get_group_base(dev, tn, inode_chunk);
+ 
+-				yaffs_ReleaseTempBuffer(dev, localBuffer,
+-							__LINE__);
++	if (in_scan != 0) {
++		/* If we're scanning then we need to test for duplicates
++		 * NB This does not need to be efficient since it should only ever
++		 * happen when the power fails during a write, then only one
++		 * chunk should ever be affected.
++		 *
++		 * Correction for YAFFS2: This could happen quite a lot and we need to think about efficiency! TODO
++		 * Update: For backward scanning we don't need to re-read tags so this is quite cheap.
++		 */
++
++		if (existingChunk > 0) {
++			/* NB Right now existing chunk will not be real chunk_id if the chunk group size > 1
++			 *    thus we have to do a FindChunkInFile to get the real chunk id.
++			 *
++			 * We have a duplicate now we need to decide which one to use:
++			 *
++			 * Backwards scanning YAFFS2: The old one is what we use, dump the new one.
++			 * Forward scanning YAFFS2: The new one is what we use, dump the old one.
++			 * YAFFS1: Get both sets of tags and compare serial numbers.
++			 */
++
++			if (in_scan > 0) {
++				/* Only do this for forward scanning */
++				yaffs_rd_chunk_tags_nand(dev,
++								nand_chunk,
++								NULL, &newTags);
+ 
++				/* Do a proper find */
++				existingChunk =
++				    yaffs_find_chunk_in_file(in, inode_chunk,
++							  &existingTags);
+ 			}
+ 
+-		} else {
+-			/* A full chunk. Write directly from the supplied buffer. */
++			if (existingChunk <= 0) {
++				/*Hoosterman - how did this happen? */
+ 
++				T(YAFFS_TRACE_ERROR,
++				  (TSTR
++				   ("yaffs tragedy: existing chunk < 0 in scan"
++				    TENDSTR)));
+ 
++			}
+ 
+-			chunkWritten =
+-			    yaffs_WriteChunkDataToObject(in, chunk, buffer,
+-							 dev->nDataBytesPerChunk,
+-							 0);
++			/* NB The deleted flags should be false, otherwise the chunks will
++			 * not be loaded during a scan
++			 */
+ 
+-			/* Since we've overwritten the cached data, we better invalidate it. */
+-			yaffs_InvalidateChunkCache(in, chunk);
+-		}
++			if (in_scan > 0) {
++				newSerial = newTags.serial_number;
++				existingSerial = existingTags.serial_number;
++			}
+ 
+-		if (chunkWritten >= 0) {
+-			n -= nToCopy;
+-			offset += nToCopy;
+-			buffer += nToCopy;
+-			nDone += nToCopy;
++			if ((in_scan > 0) &&
++			    (existingChunk <= 0 ||
++			     ((existingSerial + 1) & 3) == newSerial)) {
++				/* Forward scanning.
++				 * Use new
++				 * Delete the old one and drop through to update the tnode
++				 */
++				yaffs_chunk_del(dev, existingChunk, 1,
++						  __LINE__);
++			} else {
++				/* Backward scanning or we want to use the existing one
++				 * Use existing.
++				 * Delete the new one and return early so that the tnode isn't changed
++				 */
++				yaffs_chunk_del(dev, nand_chunk, 1,
++						  __LINE__);
++				return YAFFS_OK;
++			}
+ 		}
+ 
+ 	}
+ 
+-	/* Update file object */
+-
+-	if ((startOfWrite + nDone) > in->variant.fileVariant.fileSize)
+-		in->variant.fileVariant.fileSize = (startOfWrite + nDone);
++	if (existingChunk == 0)
++		in->n_data_chunks++;
+ 
+-	in->dirty = 1;
++	yaffs_load_tnode_0(dev, tn, inode_chunk, nand_chunk);
+ 
+-	return nDone;
++	return YAFFS_OK;
+ }
+ 
++static int yaffs_rd_data_obj(yaffs_obj_t *in, int inode_chunk,
++					__u8 *buffer)
++{
++	int nand_chunk = yaffs_find_chunk_in_file(in, inode_chunk, NULL);
+ 
+-/* ---------------------- File resizing stuff ------------------ */
++	if (nand_chunk >= 0)
++		return yaffs_rd_chunk_tags_nand(in->my_dev, nand_chunk,
++						buffer, NULL);
++	else {
++		T(YAFFS_TRACE_NANDACCESS,
++		  (TSTR("Chunk %d not found zero instead" TENDSTR),
++		   nand_chunk));
++		/* get sane (zero) data if you read a hole */
++		memset(buffer, 0, in->my_dev->data_bytes_per_chunk);
++		return 0;
++	}
++
++}
+ 
+-static void yaffs_PruneResizedChunks(yaffs_Object *in, int newSize)
++void yaffs_chunk_del(yaffs_dev_t *dev, int chunk_id, int mark_flash, int lyn)
+ {
++	int block;
++	int page;
++	yaffs_ext_tags tags;
++	yaffs_block_info_t *bi;
+ 
+-	yaffs_Device *dev = in->myDev;
+-	int oldFileSize = in->variant.fileVariant.fileSize;
++	if (chunk_id <= 0)
++		return;
+ 
+-	int lastDel = 1 + (oldFileSize - 1) / dev->nDataBytesPerChunk;
++	dev->n_deletions++;
++	block = chunk_id / dev->param.chunks_per_block;
++	page = chunk_id % dev->param.chunks_per_block;
+ 
+-	int startDel = 1 + (newSize + dev->nDataBytesPerChunk - 1) /
+-	    dev->nDataBytesPerChunk;
+-	int i;
+-	int chunkId;
+ 
+-	/* Delete backwards so that we don't end up with holes if
+-	 * power is lost part-way through the operation.
++	if (!yaffs_check_chunk_bit(dev, block, page))
++		T(YAFFS_TRACE_VERIFY,
++			(TSTR("Deleting invalid chunk %d"TENDSTR),
++			 chunk_id));
++
++	bi = yaffs_get_block_info(dev, block);
++	
++	yaffs2_update_oldest_dirty_seq(dev, block, bi);
++
++	T(YAFFS_TRACE_DELETION,
++	  (TSTR("line %d delete of chunk %d" TENDSTR), lyn, chunk_id));
++
++	if (!dev->param.is_yaffs2 && mark_flash &&
++	    bi->block_state != YAFFS_BLOCK_STATE_COLLECTING) {
++
++		yaffs_init_tags(&tags);
++
++		tags.is_deleted = 1;
++
++		yaffs_wr_chunk_tags_nand(dev, chunk_id, NULL, &tags);
++		yaffs_handle_chunk_update(dev, chunk_id, &tags);
++	} else {
++		dev->n_unmarked_deletions++;
++	}
++
++	/* Pull out of the management area.
++	 * If the whole block became dirty, this will kick off an erasure.
+ 	 */
+-	for (i = lastDel; i >= startDel; i--) {
+-		/* NB this could be optimised somewhat,
+-		 * eg. could retrieve the tags and write them without
+-		 * using yaffs_DeleteChunk
+-		 */
++	if (bi->block_state == YAFFS_BLOCK_STATE_ALLOCATING ||
++	    bi->block_state == YAFFS_BLOCK_STATE_FULL ||
++	    bi->block_state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
++	    bi->block_state == YAFFS_BLOCK_STATE_COLLECTING) {
++		dev->n_free_chunks++;
+ 
+-		chunkId = yaffs_FindAndDeleteChunkInFile(in, i, NULL);
+-		if (chunkId > 0) {
+-			if (chunkId <
+-			    (dev->internalStartBlock * dev->nChunksPerBlock)
+-			    || chunkId >=
+-			    ((dev->internalEndBlock +
+-			      1) * dev->nChunksPerBlock)) {
+-				T(YAFFS_TRACE_ALWAYS,
+-				  (TSTR("Found daft chunkId %d for %d" TENDSTR),
+-				   chunkId, i));
+-			} else {
+-				in->nDataChunks--;
+-				yaffs_DeleteChunk(dev, chunkId, 1, __LINE__);
+-			}
++		yaffs_clear_chunk_bit(dev, block, page);
++
++		bi->pages_in_use--;
++
++		if (bi->pages_in_use == 0 &&
++		    !bi->has_shrink_hdr &&
++		    bi->block_state != YAFFS_BLOCK_STATE_ALLOCATING &&
++		    bi->block_state != YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
++			yaffs_block_became_dirty(dev, block);
+ 		}
++
+ 	}
+ 
+ }
+ 
+-int yaffs_ResizeFile(yaffs_Object *in, loff_t newSize)
++static int yaffs_wr_data_obj(yaffs_obj_t *in, int inode_chunk,
++					const __u8 *buffer, int n_bytes,
++					int useReserve)
+ {
++	/* Find old chunk Need to do this to get serial number
++	 * Write new one and patch into tree.
++	 * Invalidate old tags.
++	 */
+ 
+-	int oldFileSize = in->variant.fileVariant.fileSize;
+-	__u32 newSizeOfPartialChunk;
+-	int newFullChunks;
++	int prevChunkId;
++	yaffs_ext_tags prevTags;
+ 
+-	yaffs_Device *dev = in->myDev;
++	int newChunkId;
++	yaffs_ext_tags newTags;
+ 
+-	yaffs_AddrToChunk(dev, newSize, &newFullChunks, &newSizeOfPartialChunk);
++	yaffs_dev_t *dev = in->my_dev;
+ 
+-	yaffs_FlushFilesChunkCache(in);
+-	yaffs_InvalidateWholeChunkCache(in);
++	yaffs_check_gc(dev,0);
+ 
+-	yaffs_CheckGarbageCollection(dev);
++	/* Get the previous chunk at this location in the file if it exists.
++	 * If it does not exist then put a zero into the tree. This creates
++	 * the tnode now, rather than later when it is harder to clean up.
++	 */
++	prevChunkId = yaffs_find_chunk_in_file(in, inode_chunk, &prevTags);
++	if(prevChunkId < 1 &&
++		!yaffs_put_chunk_in_file(in, inode_chunk, 0, 0))
++		return 0;
+ 
+-	if (in->variantType != YAFFS_OBJECT_TYPE_FILE)
+-		return YAFFS_FAIL;
++	/* Set up new tags */
++	yaffs_init_tags(&newTags);
+ 
+-	if (newSize == oldFileSize)
+-		return YAFFS_OK;
++	newTags.chunk_id = inode_chunk;
++	newTags.obj_id = in->obj_id;
++	newTags.serial_number =
++	    (prevChunkId > 0) ? prevTags.serial_number + 1 : 1;
++	newTags.n_bytes = n_bytes;
+ 
+-	if (newSize < oldFileSize) {
++	if (n_bytes < 1 || n_bytes > dev->param.total_bytes_per_chunk) {
++		T(YAFFS_TRACE_ERROR,
++		(TSTR("Writing %d bytes to chunk!!!!!!!!!" TENDSTR), n_bytes));
++		YBUG();
++	}
++	
++		
++	newChunkId =
++	    yaffs_write_new_chunk(dev, buffer, &newTags,
++					      useReserve);
+ 
+-		yaffs_PruneResizedChunks(in, newSize);
++	if (newChunkId > 0) {
++		yaffs_put_chunk_in_file(in, inode_chunk, newChunkId, 0);
+ 
+-		if (newSizeOfPartialChunk != 0) {
+-			int lastChunk = 1 + newFullChunks;
++		if (prevChunkId > 0)
++			yaffs_chunk_del(dev, prevChunkId, 1, __LINE__);
+ 
+-			__u8 *localBuffer = yaffs_GetTempBuffer(dev, __LINE__);
++		yaffs_verify_file_sane(in);
++	}
++	return newChunkId;
+ 
+-			/* Got to read and rewrite the last chunk with its new size and zero pad */
+-			yaffs_ReadChunkDataFromObject(in, lastChunk,
+-						      localBuffer);
++}
+ 
+-			memset(localBuffer + newSizeOfPartialChunk, 0,
+-			       dev->nDataBytesPerChunk - newSizeOfPartialChunk);
++/* UpdateObjectHeader updates the header on NAND for an object.
++ * If name is not NULL, then that new name is used.
++ */
++int yaffs_update_oh(yaffs_obj_t *in, const YCHAR *name, int force,
++			     int is_shrink, int shadows, yaffs_xattr_mod *xmod)
++{
+ 
+-			yaffs_WriteChunkDataToObject(in, lastChunk, localBuffer,
+-						     newSizeOfPartialChunk, 1);
++	yaffs_block_info_t *bi;
+ 
+-			yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__);
+-		}
++	yaffs_dev_t *dev = in->my_dev;
+ 
+-		in->variant.fileVariant.fileSize = newSize;
++	int prevChunkId;
++	int retVal = 0;
++	int result = 0;
+ 
+-		yaffs_PruneFileStructure(dev, &in->variant.fileVariant);
+-	} else {
+-		/* newsSize > oldFileSize */
+-		in->variant.fileVariant.fileSize = newSize;
+-	}
++	int newChunkId;
++	yaffs_ext_tags newTags;
++	yaffs_ext_tags oldTags;
++	const YCHAR *alias = NULL;
+ 
++	__u8 *buffer = NULL;
++	YCHAR old_name[YAFFS_MAX_NAME_LENGTH + 1];
+ 
+-	/* Write a new object header.
+-	 * show we've shrunk the file, if need be
+-	 * Do this only if the file is not in the deleted directories.
+-	 */
+-	if (in->parent &&
+-	    in->parent->objectId != YAFFS_OBJECTID_UNLINKED &&
+-	    in->parent->objectId != YAFFS_OBJECTID_DELETED)
+-		yaffs_UpdateObjectHeader(in, NULL, 0,
+-					 (newSize < oldFileSize) ? 1 : 0, 0);
++	yaffs_obj_header *oh = NULL;
+ 
+-	return YAFFS_OK;
+-}
++	yaffs_strcpy(old_name, _Y("silly old name"));
+ 
+-loff_t yaffs_GetFileSize(yaffs_Object *obj)
+-{
+-	obj = yaffs_GetEquivalentObject(obj);
+ 
+-	switch (obj->variantType) {
+-	case YAFFS_OBJECT_TYPE_FILE:
+-		return obj->variant.fileVariant.fileSize;
+-	case YAFFS_OBJECT_TYPE_SYMLINK:
+-		return yaffs_strlen(obj->variant.symLinkVariant.alias);
+-	default:
+-		return 0;
+-	}
+-}
++	if (!in->fake ||
++		in == dev->root_dir || /* The root_dir should also be saved */
++		force  || xmod) {
+ 
++		yaffs_check_gc(dev,0);
++		yaffs_check_obj_details_loaded(in);
+ 
++		buffer = yaffs_get_temp_buffer(in->my_dev, __LINE__);
++		oh = (yaffs_obj_header *) buffer;
++
++		prevChunkId = in->hdr_chunk;
++
++		if (prevChunkId > 0) {
++			result = yaffs_rd_chunk_tags_nand(dev, prevChunkId,
++							buffer, &oldTags);
++
++			yaffs_verify_oh(in, oh, &oldTags, 0);
++
++			memcpy(old_name, oh->name, sizeof(oh->name));
++			memset(buffer, 0xFF, sizeof(yaffs_obj_header));
++		} else
++			memset(buffer, 0xFF, dev->data_bytes_per_chunk);
++
++		oh->type = in->variant_type;
++		oh->yst_mode = in->yst_mode;
++		oh->shadows_obj = oh->inband_shadowed_obj_id = shadows;
+ 
+-int yaffs_FlushFile(yaffs_Object *in, int updateTime)
+-{
+-	int retVal;
+-	if (in->dirty) {
+-		yaffs_FlushFilesChunkCache(in);
+-		if (updateTime) {
+ #ifdef CONFIG_YAFFS_WINCE
+-			yfsd_WinFileTimeNow(in->win_mtime);
++		oh->win_atime[0] = in->win_atime[0];
++		oh->win_ctime[0] = in->win_ctime[0];
++		oh->win_mtime[0] = in->win_mtime[0];
++		oh->win_atime[1] = in->win_atime[1];
++		oh->win_ctime[1] = in->win_ctime[1];
++		oh->win_mtime[1] = in->win_mtime[1];
+ #else
++		oh->yst_uid = in->yst_uid;
++		oh->yst_gid = in->yst_gid;
++		oh->yst_atime = in->yst_atime;
++		oh->yst_mtime = in->yst_mtime;
++		oh->yst_ctime = in->yst_ctime;
++		oh->yst_rdev = in->yst_rdev;
++#endif
++		if (in->parent)
++			oh->parent_obj_id = in->parent->obj_id;
++		else
++			oh->parent_obj_id = 0;
++
++		if (name && *name) {
++			memset(oh->name, 0, sizeof(oh->name));
++			yaffs_load_oh_from_name(dev,oh->name,name);
++		} else if (prevChunkId > 0)
++			memcpy(oh->name, old_name, sizeof(oh->name));
++		else
++			memset(oh->name, 0, sizeof(oh->name));
+ 
+-			in->yst_mtime = Y_CURRENT_TIME;
++		oh->is_shrink = is_shrink;
+ 
+-#endif
++		switch (in->variant_type) {
++		case YAFFS_OBJECT_TYPE_UNKNOWN:
++			/* Should not happen */
++			break;
++		case YAFFS_OBJECT_TYPE_FILE:
++			oh->file_size =
++			    (oh->parent_obj_id == YAFFS_OBJECTID_DELETED
++			     || oh->parent_obj_id ==
++			     YAFFS_OBJECTID_UNLINKED) ? 0 : in->variant.
++			    file_variant.file_size;
++			break;
++		case YAFFS_OBJECT_TYPE_HARDLINK:
++			oh->equiv_id =
++			    in->variant.hardlink_variant.equiv_id;
++			break;
++		case YAFFS_OBJECT_TYPE_SPECIAL:
++			/* Do nothing */
++			break;
++		case YAFFS_OBJECT_TYPE_DIRECTORY:
++			/* Do nothing */
++			break;
++		case YAFFS_OBJECT_TYPE_SYMLINK:
++			alias = in->variant.symlink_variant.alias;
++			if(!alias)
++				alias = _Y("no alias");
++			yaffs_strncpy(oh->alias,
++					alias,
++				      YAFFS_MAX_ALIAS_LENGTH);
++			oh->alias[YAFFS_MAX_ALIAS_LENGTH] = 0;
++			break;
+ 		}
+ 
+-		retVal = (yaffs_UpdateObjectHeader(in, NULL, 0, 0, 0) >=
+-			0) ? YAFFS_OK : YAFFS_FAIL;
+-	} else {
+-		retVal = YAFFS_OK;
+-	}
++		/* process any xattrib modifications */
++		if(xmod)
++			yaffs_apply_xattrib_mod(in, (char *)buffer, xmod);
+ 
+-	return retVal;
+ 
+-}
++		/* Tags */
++		yaffs_init_tags(&newTags);
++		in->serial++;
++		newTags.chunk_id = 0;
++		newTags.obj_id = in->obj_id;
++		newTags.serial_number = in->serial;
+ 
+-static int yaffs_DoGenericObjectDeletion(yaffs_Object *in)
+-{
++		/* Add extra info for file header */
+ 
+-	/* First off, invalidate the file's data in the cache, without flushing. */
+-	yaffs_InvalidateWholeChunkCache(in);
++		newTags.extra_available = 1;
++		newTags.extra_parent_id = oh->parent_obj_id;
++		newTags.extra_length = oh->file_size;
++		newTags.extra_is_shrink = oh->is_shrink;
++		newTags.extra_equiv_id = oh->equiv_id;
++		newTags.extra_shadows = (oh->shadows_obj > 0) ? 1 : 0;
++		newTags.extra_obj_type = in->variant_type;
+ 
+-	if (in->myDev->isYaffs2 && (in->parent != in->myDev->deletedDir)) {
+-		/* Move to the unlinked directory so we have a record that it was deleted. */
+-		yaffs_ChangeObjectName(in, in->myDev->deletedDir, _Y("deleted"), 0, 0);
++		yaffs_verify_oh(in, oh, &newTags, 1);
+ 
+-	}
++		/* Create new chunk in NAND */
++		newChunkId =
++		    yaffs_write_new_chunk(dev, buffer, &newTags,
++						      (prevChunkId > 0) ? 1 : 0);
+ 
+-	yaffs_RemoveObjectFromDirectory(in);
+-	yaffs_DeleteChunk(in->myDev, in->hdrChunk, 1, __LINE__);
+-	in->hdrChunk = 0;
++		if (newChunkId >= 0) {
+ 
+-	yaffs_FreeObject(in);
+-	return YAFFS_OK;
++			in->hdr_chunk = newChunkId;
+ 
+-}
++			if (prevChunkId > 0) {
++				yaffs_chunk_del(dev, prevChunkId, 1,
++						  __LINE__);
++			}
+ 
+-/* yaffs_DeleteFile deletes the whole file data
+- * and the inode associated with the file.
+- * It does not delete the links associated with the file.
+- */
+-static int yaffs_UnlinkFileIfNeeded(yaffs_Object *in)
+-{
++			if (!yaffs_obj_cache_dirty(in))
++				in->dirty = 0;
+ 
+-	int retVal;
+-	int immediateDeletion = 0;
++			/* If this was a shrink, then mark the block that the chunk lives on */
++			if (is_shrink) {
++				bi = yaffs_get_block_info(in->my_dev,
++					newChunkId / in->my_dev->param.chunks_per_block);
++				bi->has_shrink_hdr = 1;
++			}
+ 
+-#ifdef __KERNEL__
+-	if (!in->myInode)
+-		immediateDeletion = 1;
+-#else
+-	if (in->inUse <= 0)
+-		immediateDeletion = 1;
+-#endif
++		}
++
++		retVal = newChunkId;
+ 
+-	if (immediateDeletion) {
+-		retVal =
+-		    yaffs_ChangeObjectName(in, in->myDev->deletedDir,
+-					   _Y("deleted"), 0, 0);
+-		T(YAFFS_TRACE_TRACING,
+-		  (TSTR("yaffs: immediate deletion of file %d" TENDSTR),
+-		   in->objectId));
+-		in->deleted = 1;
+-		in->myDev->nDeletedFiles++;
+-		if (1 || in->myDev->isYaffs2)
+-			yaffs_ResizeFile(in, 0);
+-		yaffs_SoftDeleteFile(in);
+-	} else {
+-		retVal =
+-		    yaffs_ChangeObjectName(in, in->myDev->unlinkedDir,
+-					   _Y("unlinked"), 0, 0);
+ 	}
+ 
++	if (buffer)
++		yaffs_release_temp_buffer(dev, buffer, __LINE__);
+ 
+ 	return retVal;
+ }
+ 
+-int yaffs_DeleteFile(yaffs_Object *in)
+-{
+-	int retVal = YAFFS_OK;
+-	int deleted = in->deleted;
+-
+-	yaffs_ResizeFile(in, 0);
+-
+-	if (in->nDataChunks > 0) {
+-		/* Use soft deletion if there is data in the file.
+-		 * That won't be the case if it has been resized to zero.
+-		 */
+-		if (!in->unlinked)
+-			retVal = yaffs_UnlinkFileIfNeeded(in);
+-
+-		if (retVal == YAFFS_OK && in->unlinked && !in->deleted) {
+-			in->deleted = 1;
+-			deleted = 1;
+-			in->myDev->nDeletedFiles++;
+-			yaffs_SoftDeleteFile(in);
+-		}
+-		return deleted ? YAFFS_OK : YAFFS_FAIL;
+-	} else {
+-		/* The file has no data chunks so we toss it immediately */
+-		yaffs_FreeTnode(in->myDev, in->variant.fileVariant.top);
+-		in->variant.fileVariant.top = NULL;
+-		yaffs_DoGenericObjectDeletion(in);
+-
+-		return YAFFS_OK;
+-	}
+-}
++/*------------------------ Short Operations Cache ----------------------------------------
++ *   In many situations where there is no high level buffering (eg WinCE) a lot of
++ *   reads might be short sequential reads, and a lot of writes may be short
++ *   sequential writes. eg. scanning/writing a jpeg file.
++ *   In these cases, a short read/write cache can provide a huge perfomance benefit
++ *   with dumb-as-a-rock code.
++ *   In Linux, the page cache provides read buffering aand the short op cache provides write
++ *   buffering.
++ *
++ *   There are a limited number (~10) of cache chunks per device so that we don't
++ *   need a very intelligent search.
++ */
+ 
+-static int yaffs_DeleteDirectory(yaffs_Object *in)
++static int yaffs_obj_cache_dirty(yaffs_obj_t *obj)
+ {
+-	/* First check that the directory is empty. */
+-	if (ylist_empty(&in->variant.directoryVariant.children))
+-		return yaffs_DoGenericObjectDeletion(in);
++	yaffs_dev_t *dev = obj->my_dev;
++	int i;
++	yaffs_cache_t *cache;
++	int nCaches = obj->my_dev->param.n_caches;
+ 
+-	return YAFFS_FAIL;
++	for (i = 0; i < nCaches; i++) {
++		cache = &dev->cache[i];
++		if (cache->object == obj &&
++		    cache->dirty)
++			return 1;
++	}
+ 
++	return 0;
+ }
+ 
+-static int yaffs_DeleteSymLink(yaffs_Object *in)
+-{
+-	YFREE(in->variant.symLinkVariant.alias);
+-
+-	return yaffs_DoGenericObjectDeletion(in);
+-}
+ 
+-static int yaffs_DeleteHardLink(yaffs_Object *in)
++static void yaffs_flush_file_cache(yaffs_obj_t *obj)
+ {
+-	/* remove this hardlink from the list assocaited with the equivalent
+-	 * object
+-	 */
+-	ylist_del_init(&in->hardLinks);
+-	return yaffs_DoGenericObjectDeletion(in);
+-}
++	yaffs_dev_t *dev = obj->my_dev;
++	int lowest = -99;	/* Stop compiler whining. */
++	int i;
++	yaffs_cache_t *cache;
++	int chunkWritten = 0;
++	int nCaches = obj->my_dev->param.n_caches;
+ 
+-int yaffs_DeleteObject(yaffs_Object *obj)
+-{
+-int retVal = -1;
+-	switch (obj->variantType) {
+-	case YAFFS_OBJECT_TYPE_FILE:
+-		retVal = yaffs_DeleteFile(obj);
+-		break;
+-	case YAFFS_OBJECT_TYPE_DIRECTORY:
+-		return yaffs_DeleteDirectory(obj);
+-		break;
+-	case YAFFS_OBJECT_TYPE_SYMLINK:
+-		retVal = yaffs_DeleteSymLink(obj);
+-		break;
+-	case YAFFS_OBJECT_TYPE_HARDLINK:
+-		retVal = yaffs_DeleteHardLink(obj);
+-		break;
+-	case YAFFS_OBJECT_TYPE_SPECIAL:
+-		retVal = yaffs_DoGenericObjectDeletion(obj);
+-		break;
+-	case YAFFS_OBJECT_TYPE_UNKNOWN:
+-		retVal = 0;
+-		break;		/* should not happen. */
+-	}
++	if (nCaches > 0) {
++		do {
++			cache = NULL;
+ 
+-	return retVal;
+-}
++			/* Find the dirty cache for this object with the lowest chunk id. */
++			for (i = 0; i < nCaches; i++) {
++				if (dev->cache[i].object == obj &&
++				    dev->cache[i].dirty) {
++					if (!cache
++					    || dev->cache[i].chunk_id <
++					    lowest) {
++						cache = &dev->cache[i];
++						lowest = cache->chunk_id;
++					}
++				}
++			}
+ 
+-static int yaffs_UnlinkWorker(yaffs_Object *obj)
+-{
++			if (cache && !cache->locked) {
++				/* Write it out and free it up */
+ 
+-	int immediateDeletion = 0;
++				chunkWritten =
++				    yaffs_wr_data_obj(cache->object,
++								 cache->chunk_id,
++								 cache->data,
++								 cache->n_bytes,
++								 1);
++				cache->dirty = 0;
++				cache->object = NULL;
++			}
+ 
+-#ifdef __KERNEL__
+-	if (!obj->myInode)
+-		immediateDeletion = 1;
+-#else
+-	if (obj->inUse <= 0)
+-		immediateDeletion = 1;
+-#endif
++		} while (cache && chunkWritten > 0);
+ 
+-	if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
+-		return yaffs_DeleteHardLink(obj);
+-	} else if (!ylist_empty(&obj->hardLinks)) {
+-		/* Curve ball: We're unlinking an object that has a hardlink.
+-		 *
+-		 * This problem arises because we are not strictly following
+-		 * The Linux link/inode model.
+-		 *
+-		 * We can't really delete the object.
+-		 * Instead, we do the following:
+-		 * - Select a hardlink.
+-		 * - Unhook it from the hard links
+-		 * - Unhook it from its parent directory (so that the rename can work)
+-		 * - Rename the object to the hardlink's name.
+-		 * - Delete the hardlink
+-		 */
++		if (cache) {
++			/* Hoosterman, disk full while writing cache out. */
++			T(YAFFS_TRACE_ERROR,
++			  (TSTR("yaffs tragedy: no space during cache write" TENDSTR)));
+ 
+-		yaffs_Object *hl;
+-		int retVal;
+-		YCHAR name[YAFFS_MAX_NAME_LENGTH + 1];
++		}
++	}
+ 
+-		hl = ylist_entry(obj->hardLinks.next, yaffs_Object, hardLinks);
++}
+ 
+-		ylist_del_init(&hl->hardLinks);
+-		ylist_del_init(&hl->siblings);
++/*yaffs_flush_whole_cache(dev)
++ *
++ *
++ */
+ 
+-		yaffs_GetObjectName(hl, name, YAFFS_MAX_NAME_LENGTH + 1);
++void yaffs_flush_whole_cache(yaffs_dev_t *dev)
++{
++	yaffs_obj_t *obj;
++	int nCaches = dev->param.n_caches;
++	int i;
+ 
+-		retVal = yaffs_ChangeObjectName(obj, hl->parent, name, 0, 0);
++	/* Find a dirty object in the cache and flush it...
++	 * until there are no further dirty objects.
++	 */
++	do {
++		obj = NULL;
++		for (i = 0; i < nCaches && !obj; i++) {
++			if (dev->cache[i].object &&
++			    dev->cache[i].dirty)
++				obj = dev->cache[i].object;
+ 
+-		if (retVal == YAFFS_OK)
+-			retVal = yaffs_DoGenericObjectDeletion(hl);
++		}
++		if (obj)
++			yaffs_flush_file_cache(obj);
+ 
+-		return retVal;
++	} while (obj);
+ 
+-	} else if (immediateDeletion) {
+-		switch (obj->variantType) {
+-		case YAFFS_OBJECT_TYPE_FILE:
+-			return yaffs_DeleteFile(obj);
+-			break;
+-		case YAFFS_OBJECT_TYPE_DIRECTORY:
+-			return yaffs_DeleteDirectory(obj);
+-			break;
+-		case YAFFS_OBJECT_TYPE_SYMLINK:
+-			return yaffs_DeleteSymLink(obj);
+-			break;
+-		case YAFFS_OBJECT_TYPE_SPECIAL:
+-			return yaffs_DoGenericObjectDeletion(obj);
+-			break;
+-		case YAFFS_OBJECT_TYPE_HARDLINK:
+-		case YAFFS_OBJECT_TYPE_UNKNOWN:
+-		default:
+-			return YAFFS_FAIL;
+-		}
+-	} else
+-		return yaffs_ChangeObjectName(obj, obj->myDev->unlinkedDir,
+-					   _Y("unlinked"), 0, 0);
+ }
+ 
+ 
+-static int yaffs_UnlinkObject(yaffs_Object *obj)
++/* Grab us a cache chunk for use.
++ * First look for an empty one.
++ * Then look for the least recently used non-dirty one.
++ * Then look for the least recently used dirty one...., flush and look again.
++ */
++static yaffs_cache_t *yaffs_grab_chunk_worker(yaffs_dev_t *dev)
+ {
++	int i;
+ 
+-	if (obj && obj->unlinkAllowed)
+-		return yaffs_UnlinkWorker(obj);
+-
+-	return YAFFS_FAIL;
+-
+-}
+-int yaffs_Unlink(yaffs_Object *dir, const YCHAR *name)
+-{
+-	yaffs_Object *obj;
++	if (dev->param.n_caches > 0) {
++		for (i = 0; i < dev->param.n_caches; i++) {
++			if (!dev->cache[i].object)
++				return &dev->cache[i];
++		}
++	}
+ 
+-	obj = yaffs_FindObjectByName(dir, name);
+-	return yaffs_UnlinkObject(obj);
++	return NULL;
+ }
+ 
+-/*----------------------- Initialisation Scanning ---------------------- */
+-
+-static void yaffs_HandleShadowedObject(yaffs_Device *dev, int objId,
+-				int backwardScanning)
++static yaffs_cache_t *yaffs_grab_chunk_cache(yaffs_dev_t *dev)
+ {
+-	yaffs_Object *obj;
++	yaffs_cache_t *cache;
++	yaffs_obj_t *theObj;
++	int usage;
++	int i;
++	int pushout;
+ 
+-	if (!backwardScanning) {
+-		/* Handle YAFFS1 forward scanning case
+-		 * For YAFFS1 we always do the deletion
+-		 */
++	if (dev->param.n_caches > 0) {
++		/* Try find a non-dirty one... */
+ 
+-	} else {
+-		/* Handle YAFFS2 case (backward scanning)
+-		 * If the shadowed object exists then ignore.
+-		 */
+-		if (yaffs_FindObjectByNumber(dev, objId))
+-			return;
+-	}
++		cache = yaffs_grab_chunk_worker(dev);
+ 
+-	/* Let's create it (if it does not exist) assuming it is a file so that it can do shrinking etc.
+-	 * We put it in unlinked dir to be cleaned up after the scanning
+-	 */
+-	obj =
+-	    yaffs_FindOrCreateObjectByNumber(dev, objId,
+-					     YAFFS_OBJECT_TYPE_FILE);
+-	if (!obj)
+-		return;
+-	yaffs_AddObjectToDirectory(dev->unlinkedDir, obj);
+-	obj->variant.fileVariant.shrinkSize = 0;
+-	obj->valid = 1;		/* So that we don't read any other info for this file */
++		if (!cache) {
++			/* They were all dirty, find the last recently used object and flush
++			 * its cache, then  find again.
++			 * NB what's here is not very accurate, we actually flush the object
++			 * the last recently used page.
++			 */
+ 
+-}
++			/* With locking we can't assume we can use entry zero */
+ 
+-typedef struct {
+-	int seq;
+-	int block;
+-} yaffs_BlockIndex;
++			theObj = NULL;
++			usage = -1;
++			cache = NULL;
++			pushout = -1;
+ 
++			for (i = 0; i < dev->param.n_caches; i++) {
++				if (dev->cache[i].object &&
++				    !dev->cache[i].locked &&
++				    (dev->cache[i].last_use < usage || !cache)) {
++					usage = dev->cache[i].last_use;
++					theObj = dev->cache[i].object;
++					cache = &dev->cache[i];
++					pushout = i;
++				}
++			}
+ 
+-static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList)
+-{
+-	yaffs_Object *hl;
+-	yaffs_Object *in;
++			if (!cache || cache->dirty) {
++				/* Flush and try again */
++				yaffs_flush_file_cache(theObj);
++				cache = yaffs_grab_chunk_worker(dev);
++			}
+ 
+-	while (hardList) {
+-		hl = hardList;
+-		hardList = (yaffs_Object *) (hardList->hardLinks.next);
++		}
++		return cache;
++	} else
++		return NULL;
+ 
+-		in = yaffs_FindObjectByNumber(dev,
+-					      hl->variant.hardLinkVariant.
+-					      equivalentObjectId);
++}
+ 
+-		if (in) {
+-			/* Add the hardlink pointers */
+-			hl->variant.hardLinkVariant.equivalentObject = in;
+-			ylist_add(&hl->hardLinks, &in->hardLinks);
+-		} else {
+-			/* Todo Need to report/handle this better.
+-			 * Got a problem... hardlink to a non-existant object
+-			 */
+-			hl->variant.hardLinkVariant.equivalentObject = NULL;
+-			YINIT_LIST_HEAD(&hl->hardLinks);
++/* Find a cached chunk */
++static yaffs_cache_t *yaffs_find_chunk_cache(const yaffs_obj_t *obj,
++					      int chunk_id)
++{
++	yaffs_dev_t *dev = obj->my_dev;
++	int i;
++	if (dev->param.n_caches > 0) {
++		for (i = 0; i < dev->param.n_caches; i++) {
++			if (dev->cache[i].object == obj &&
++			    dev->cache[i].chunk_id == chunk_id) {
++				dev->cache_hits++;
+ 
++				return &dev->cache[i];
++			}
+ 		}
+ 	}
++	return NULL;
+ }
+ 
++/* Mark the chunk for the least recently used algorithym */
++static void yaffs_use_cache(yaffs_dev_t *dev, yaffs_cache_t *cache,
++				int isAWrite)
++{
++
++	if (dev->param.n_caches > 0) {
++		if (dev->cache_last_use < 0 || dev->cache_last_use > 100000000) {
++			/* Reset the cache usages */
++			int i;
++			for (i = 1; i < dev->param.n_caches; i++)
++				dev->cache[i].last_use = 0;
+ 
++			dev->cache_last_use = 0;
++		}
+ 
++		dev->cache_last_use++;
+ 
++		cache->last_use = dev->cache_last_use;
+ 
+-static int ybicmp(const void *a, const void *b)
+-{
+-	register int aseq = ((yaffs_BlockIndex *)a)->seq;
+-	register int bseq = ((yaffs_BlockIndex *)b)->seq;
+-	register int ablock = ((yaffs_BlockIndex *)a)->block;
+-	register int bblock = ((yaffs_BlockIndex *)b)->block;
+-	if (aseq == bseq)
+-		return ablock - bblock;
+-	else
+-		return aseq - bseq;
++		if (isAWrite)
++			cache->dirty = 1;
++	}
+ }
+ 
++/* Invalidate a single cache page.
++ * Do this when a whole page gets written,
++ * ie the short cache for this page is no longer valid.
++ */
++static void yaffs_invalidate_chunk_cache(yaffs_obj_t *object, int chunk_id)
++{
++	if (object->my_dev->param.n_caches > 0) {
++		yaffs_cache_t *cache = yaffs_find_chunk_cache(object, chunk_id);
+ 
+-struct yaffs_ShadowFixerStruct {
+-	int objectId;
+-	int shadowedId;
+-	struct yaffs_ShadowFixerStruct *next;
+-};
+-
++		if (cache)
++			cache->object = NULL;
++	}
++}
+ 
+-static void yaffs_StripDeletedObjects(yaffs_Device *dev)
++/* Invalidate all the cache pages associated with this object
++ * Do this whenever ther file is deleted or resized.
++ */
++static void yaffs_invalidate_whole_cache(yaffs_obj_t *in)
+ {
+-	/*
+-	*  Sort out state of unlinked and deleted objects after scanning.
+-	*/
+-	struct ylist_head *i;
+-	struct ylist_head *n;
+-	yaffs_Object *l;
++	int i;
++	yaffs_dev_t *dev = in->my_dev;
+ 
+-	/* Soft delete all the unlinked files */
+-	ylist_for_each_safe(i, n,
+-		&dev->unlinkedDir->variant.directoryVariant.children) {
+-		if (i) {
+-			l = ylist_entry(i, yaffs_Object, siblings);
+-			yaffs_DeleteObject(l);
++	if (dev->param.n_caches > 0) {
++		/* Invalidate it. */
++		for (i = 0; i < dev->param.n_caches; i++) {
++			if (dev->cache[i].object == in)
++				dev->cache[i].object = NULL;
+ 		}
+ 	}
++}
+ 
+-	ylist_for_each_safe(i, n,
+-		&dev->deletedDir->variant.directoryVariant.children) {
+-		if (i) {
+-			l = ylist_entry(i, yaffs_Object, siblings);
+-			yaffs_DeleteObject(l);
+-		}
+-	}
+ 
+-}
++/*--------------------- File read/write ------------------------
++ * Read and write have very similar structures.
++ * In general the read/write has three parts to it
++ * An incomplete chunk to start with (if the read/write is not chunk-aligned)
++ * Some complete chunks
++ * An incomplete chunk to end off with
++ *
++ * Curve-balls: the first chunk might also be the last chunk.
++ */
+ 
+-static int yaffs_Scan(yaffs_Device *dev)
++int yaffs_file_rd(yaffs_obj_t *in, __u8 *buffer, loff_t offset,
++			int n_bytes)
+ {
+-	yaffs_ExtendedTags tags;
+-	int blk;
+-	int blockIterator;
+-	int startIterator;
+-	int endIterator;
+-	int result;
+ 
+ 	int chunk;
+-	int c;
+-	int deleted;
+-	yaffs_BlockState state;
+-	yaffs_Object *hardList = NULL;
+-	yaffs_BlockInfo *bi;
+-	__u32 sequenceNumber;
+-	yaffs_ObjectHeader *oh;
+-	yaffs_Object *in;
+-	yaffs_Object *parent;
++	__u32 start;
++	int nToCopy;
++	int n = n_bytes;
++	int nDone = 0;
++	yaffs_cache_t *cache;
+ 
+-	int alloc_failed = 0;
++	yaffs_dev_t *dev;
+ 
+-	struct yaffs_ShadowFixerStruct *shadowFixerList = NULL;
++	dev = in->my_dev;
+ 
++	while (n > 0) {
++		/* chunk = offset / dev->data_bytes_per_chunk + 1; */
++		/* start = offset % dev->data_bytes_per_chunk; */
++		yaffs_addr_to_chunk(dev, offset, &chunk, &start);
++		chunk++;
+ 
+-	__u8 *chunkData;
++		/* OK now check for the curveball where the start and end are in
++		 * the same chunk.
++		 */
++		if ((start + n) < dev->data_bytes_per_chunk)
++			nToCopy = n;
++		else
++			nToCopy = dev->data_bytes_per_chunk - start;
+ 
++		cache = yaffs_find_chunk_cache(in, chunk);
+ 
++		/* If the chunk is already in the cache or it is less than a whole chunk
++		 * or we're using inband tags then use the cache (if there is caching)
++		 * else bypass the cache.
++		 */
++		if (cache || nToCopy != dev->data_bytes_per_chunk || dev->param.inband_tags) {
++			if (dev->param.n_caches > 0) {
+ 
+-	T(YAFFS_TRACE_SCAN,
+-	  (TSTR("yaffs_Scan starts  intstartblk %d intendblk %d..." TENDSTR),
+-	   dev->internalStartBlock, dev->internalEndBlock));
++				/* If we can't find the data in the cache, then load it up. */
+ 
+-	chunkData = yaffs_GetTempBuffer(dev, __LINE__);
++				if (!cache) {
++					cache = yaffs_grab_chunk_cache(in->my_dev);
++					cache->object = in;
++					cache->chunk_id = chunk;
++					cache->dirty = 0;
++					cache->locked = 0;
++					yaffs_rd_data_obj(in, chunk,
++								      cache->
++								      data);
++					cache->n_bytes = 0;
++				}
+ 
+-	dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER;
++				yaffs_use_cache(dev, cache, 0);
+ 
+-	/* Scan all the blocks to determine their state */
+-	for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) {
+-		bi = yaffs_GetBlockInfo(dev, blk);
+-		yaffs_ClearChunkBits(dev, blk);
+-		bi->pagesInUse = 0;
+-		bi->softDeletions = 0;
++				cache->locked = 1;
+ 
+-		yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber);
+ 
+-		bi->blockState = state;
+-		bi->sequenceNumber = sequenceNumber;
++				memcpy(buffer, &cache->data[start], nToCopy);
+ 
+-		if (bi->sequenceNumber == YAFFS_SEQUENCE_BAD_BLOCK)
+-			bi->blockState = state = YAFFS_BLOCK_STATE_DEAD;
++				cache->locked = 0;
++			} else {
++				/* Read into the local buffer then copy..*/
+ 
+-		T(YAFFS_TRACE_SCAN_DEBUG,
+-		  (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk,
+-		   state, sequenceNumber));
++				__u8 *localBuffer =
++				    yaffs_get_temp_buffer(dev, __LINE__);
++				yaffs_rd_data_obj(in, chunk,
++							      localBuffer);
+ 
+-		if (state == YAFFS_BLOCK_STATE_DEAD) {
+-			T(YAFFS_TRACE_BAD_BLOCKS,
+-			  (TSTR("block %d is bad" TENDSTR), blk));
+-		} else if (state == YAFFS_BLOCK_STATE_EMPTY) {
+-			T(YAFFS_TRACE_SCAN_DEBUG,
+-			  (TSTR("Block empty " TENDSTR)));
+-			dev->nErasedBlocks++;
+-			dev->nFreeChunks += dev->nChunksPerBlock;
+-		}
+-	}
++				memcpy(buffer, &localBuffer[start], nToCopy);
+ 
+-	startIterator = dev->internalStartBlock;
+-	endIterator = dev->internalEndBlock;
+ 
+-	/* For each block.... */
+-	for (blockIterator = startIterator; !alloc_failed && blockIterator <= endIterator;
+-	     blockIterator++) {
++				yaffs_release_temp_buffer(dev, localBuffer,
++							__LINE__);
++			}
+ 
+-		YYIELD();
++		} else {
+ 
+-		YYIELD();
++			/* A full chunk. Read directly into the supplied buffer. */
++			yaffs_rd_data_obj(in, chunk, buffer);
+ 
+-		blk = blockIterator;
++		}
+ 
+-		bi = yaffs_GetBlockInfo(dev, blk);
+-		state = bi->blockState;
++		n -= nToCopy;
++		offset += nToCopy;
++		buffer += nToCopy;
++		nDone += nToCopy;
+ 
+-		deleted = 0;
++	}
+ 
+-		/* For each chunk in each block that needs scanning....*/
+-		for (c = 0; !alloc_failed && c < dev->nChunksPerBlock &&
+-		     state == YAFFS_BLOCK_STATE_NEEDS_SCANNING; c++) {
+-			/* Read the tags and decide what to do */
+-			chunk = blk * dev->nChunksPerBlock + c;
++	return nDone;
++}
+ 
+-			result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL,
+-							&tags);
++int yaffs_do_file_wr(yaffs_obj_t *in, const __u8 *buffer, loff_t offset,
++			int n_bytes, int write_trhrough)
++{
+ 
+-			/* Let's have a good look at this chunk... */
++	int chunk;
++	__u32 start;
++	int nToCopy;
++	int n = n_bytes;
++	int nDone = 0;
++	int nToWriteBack;
++	int startOfWrite = offset;
++	int chunkWritten = 0;
++	__u32 n_bytesRead;
++	__u32 chunkStart;
+ 
+-			if (tags.eccResult == YAFFS_ECC_RESULT_UNFIXED || tags.chunkDeleted) {
+-				/* YAFFS1 only...
+-				 * A deleted chunk
+-				 */
+-				deleted++;
+-				dev->nFreeChunks++;
+-				/*T((" %d %d deleted\n",blk,c)); */
+-			} else if (!tags.chunkUsed) {
+-				/* An unassigned chunk in the block
+-				 * This means that either the block is empty or
+-				 * this is the one being allocated from
+-				 */
++	yaffs_dev_t *dev;
+ 
+-				if (c == 0) {
+-					/* We're looking at the first chunk in the block so the block is unused */
+-					state = YAFFS_BLOCK_STATE_EMPTY;
+-					dev->nErasedBlocks++;
+-				} else {
+-					/* this is the block being allocated from */
+-					T(YAFFS_TRACE_SCAN,
+-					  (TSTR
+-					   (" Allocating from %d %d" TENDSTR),
+-					   blk, c));
+-					state = YAFFS_BLOCK_STATE_ALLOCATING;
+-					dev->allocationBlock = blk;
+-					dev->allocationPage = c;
+-					dev->allocationBlockFinder = blk;
+-					/* Set it to here to encourage the allocator to go forth from here. */
++	dev = in->my_dev;
+ 
+-				}
++	while (n > 0 && chunkWritten >= 0) {
++		yaffs_addr_to_chunk(dev, offset, &chunk, &start);
+ 
+-				dev->nFreeChunks += (dev->nChunksPerBlock - c);
+-			} else if (tags.chunkId > 0) {
+-				/* chunkId > 0 so it is a data chunk... */
+-				unsigned int endpos;
+-
+-				yaffs_SetChunkBit(dev, blk, c);
+-				bi->pagesInUse++;
+-
+-				in = yaffs_FindOrCreateObjectByNumber(dev,
+-								      tags.
+-								      objectId,
+-								      YAFFS_OBJECT_TYPE_FILE);
+-				/* PutChunkIntoFile checks for a clash (two data chunks with
+-				 * the same chunkId).
+-				 */
++		if (chunk * dev->data_bytes_per_chunk + start != offset ||
++				start >= dev->data_bytes_per_chunk) {
++			T(YAFFS_TRACE_ERROR, (
++			   TSTR("AddrToChunk of offset %d gives chunk %d start %d"
++			   TENDSTR),
++			   (int)offset, chunk, start));
++		}
++		chunk++; /* File pos to chunk in file offset */
+ 
+-				if (!in)
+-					alloc_failed = 1;
++		/* OK now check for the curveball where the start and end are in
++		 * the same chunk.
++		 */
+ 
+-				if (in) {
+-					if (!yaffs_PutChunkIntoFile(in, tags.chunkId, chunk, 1))
+-						alloc_failed = 1;
+-				}
++		if ((start + n) < dev->data_bytes_per_chunk) {
++			nToCopy = n;
+ 
+-				endpos =
+-				    (tags.chunkId - 1) * dev->nDataBytesPerChunk +
+-				    tags.byteCount;
+-				if (in &&
+-				    in->variantType == YAFFS_OBJECT_TYPE_FILE
+-				    && in->variant.fileVariant.scannedFileSize <
+-				    endpos) {
+-					in->variant.fileVariant.
+-					    scannedFileSize = endpos;
+-					if (!dev->useHeaderFileSize) {
+-						in->variant.fileVariant.
+-						    fileSize =
+-						    in->variant.fileVariant.
+-						    scannedFileSize;
+-					}
++			/* Now folks, to calculate how many bytes to write back....
++			 * If we're overwriting and not writing to then end of file then
++			 * we need to write back as much as was there before.
++			 */
+ 
+-				}
+-				/* T((" %d %d data %d %d\n",blk,c,tags.objectId,tags.chunkId));   */
+-			} else {
+-				/* chunkId == 0, so it is an ObjectHeader.
+-				 * Thus, we read in the object header and make the object
+-				 */
+-				yaffs_SetChunkBit(dev, blk, c);
+-				bi->pagesInUse++;
++			chunkStart = ((chunk - 1) * dev->data_bytes_per_chunk);
+ 
+-				result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk,
+-								chunkData,
+-								NULL);
+-
+-				oh = (yaffs_ObjectHeader *) chunkData;
+-
+-				in = yaffs_FindObjectByNumber(dev,
+-							      tags.objectId);
+-				if (in && in->variantType != oh->type) {
+-					/* This should not happen, but somehow
+-					 * Wev'e ended up with an objectId that has been reused but not yet
+-					 * deleted, and worse still it has changed type. Delete the old object.
+-					 */
++			if (chunkStart > in->variant.file_variant.file_size)
++				n_bytesRead = 0; /* Past end of file */
++			else
++				n_bytesRead = in->variant.file_variant.file_size - chunkStart;
+ 
+-					yaffs_DeleteObject(in);
++			if (n_bytesRead > dev->data_bytes_per_chunk)
++				n_bytesRead = dev->data_bytes_per_chunk;
+ 
+-					in = 0;
+-				}
++			nToWriteBack =
++			    (n_bytesRead >
++			     (start + n)) ? n_bytesRead : (start + n);
+ 
+-				in = yaffs_FindOrCreateObjectByNumber(dev,
+-								      tags.
+-								      objectId,
+-								      oh->type);
+-
+-				if (!in)
+-					alloc_failed = 1;
+-
+-				if (in && oh->shadowsObject > 0) {
+-
+-					struct yaffs_ShadowFixerStruct *fixer;
+-					fixer = YMALLOC(sizeof(struct yaffs_ShadowFixerStruct));
+-					if (fixer) {
+-						fixer->next = shadowFixerList;
+-						shadowFixerList = fixer;
+-						fixer->objectId = tags.objectId;
+-						fixer->shadowedId = oh->shadowsObject;
+-					}
++			if (nToWriteBack < 0 || nToWriteBack > dev->data_bytes_per_chunk)
++				YBUG();
++
++		} else {
++			nToCopy = dev->data_bytes_per_chunk - start;
++			nToWriteBack = dev->data_bytes_per_chunk;
++		}
++
++		if (nToCopy != dev->data_bytes_per_chunk || dev->param.inband_tags) {
++			/* An incomplete start or end chunk (or maybe both start and end chunk),
++			 * or we're using inband tags, so we want to use the cache buffers.
++			 */
++			if (dev->param.n_caches > 0) {
++				yaffs_cache_t *cache;
++				/* If we can't find the data in the cache, then load the cache */
++				cache = yaffs_find_chunk_cache(in, chunk);
+ 
++				if (!cache
++				    && yaffs_check_alloc_available(dev, 1)) {
++					cache = yaffs_grab_chunk_cache(dev);
++					cache->object = in;
++					cache->chunk_id = chunk;
++					cache->dirty = 0;
++					cache->locked = 0;
++					yaffs_rd_data_obj(in, chunk,
++								      cache->data);
++				} else if (cache &&
++					!cache->dirty &&
++					!yaffs_check_alloc_available(dev, 1)) {
++					/* Drop the cache if it was a read cache item and
++					 * no space check has been made for it.
++					 */
++					 cache = NULL;
+ 				}
+ 
+-				if (in && in->valid) {
+-					/* We have already filled this one. We have a duplicate and need to resolve it. */
++				if (cache) {
++					yaffs_use_cache(dev, cache, 1);
++					cache->locked = 1;
+ 
+-					unsigned existingSerial = in->serial;
+-					unsigned newSerial = tags.serialNumber;
+ 
+-					if (((existingSerial + 1) & 3) == newSerial) {
+-						/* Use new one - destroy the exisiting one */
+-						yaffs_DeleteChunk(dev,
+-								  in->hdrChunk,
+-								  1, __LINE__);
+-						in->valid = 0;
+-					} else {
+-						/* Use existing - destroy this one. */
+-						yaffs_DeleteChunk(dev, chunk, 1,
+-								  __LINE__);
++					memcpy(&cache->data[start], buffer,
++					       nToCopy);
++
++
++					cache->locked = 0;
++					cache->n_bytes = nToWriteBack;
++
++					if (write_trhrough) {
++						chunkWritten =
++						    yaffs_wr_data_obj
++						    (cache->object,
++						     cache->chunk_id,
++						     cache->data, cache->n_bytes,
++						     1);
++						cache->dirty = 0;
+ 					}
++
++				} else {
++					chunkWritten = -1;	/* fail the write */
+ 				}
++			} else {
++				/* An incomplete start or end chunk (or maybe both start and end chunk)
++				 * Read into the local buffer then copy, then copy over and write back.
++				 */
+ 
+-				if (in && !in->valid &&
+-				    (tags.objectId == YAFFS_OBJECTID_ROOT ||
+-				     tags.objectId == YAFFS_OBJECTID_LOSTNFOUND)) {
+-					/* We only load some info, don't fiddle with directory structure */
+-					in->valid = 1;
+-					in->variantType = oh->type;
++				__u8 *localBuffer =
++				    yaffs_get_temp_buffer(dev, __LINE__);
+ 
+-					in->yst_mode = oh->yst_mode;
+-#ifdef CONFIG_YAFFS_WINCE
+-					in->win_atime[0] = oh->win_atime[0];
+-					in->win_ctime[0] = oh->win_ctime[0];
+-					in->win_mtime[0] = oh->win_mtime[0];
+-					in->win_atime[1] = oh->win_atime[1];
+-					in->win_ctime[1] = oh->win_ctime[1];
+-					in->win_mtime[1] = oh->win_mtime[1];
+-#else
+-					in->yst_uid = oh->yst_uid;
+-					in->yst_gid = oh->yst_gid;
+-					in->yst_atime = oh->yst_atime;
+-					in->yst_mtime = oh->yst_mtime;
+-					in->yst_ctime = oh->yst_ctime;
+-					in->yst_rdev = oh->yst_rdev;
+-#endif
+-					in->hdrChunk = chunk;
+-					in->serial = tags.serialNumber;
++				yaffs_rd_data_obj(in, chunk,
++							      localBuffer);
+ 
+-				} else if (in && !in->valid) {
+-					/* we need to load this info */
+ 
+-					in->valid = 1;
+-					in->variantType = oh->type;
+ 
+-					in->yst_mode = oh->yst_mode;
+-#ifdef CONFIG_YAFFS_WINCE
+-					in->win_atime[0] = oh->win_atime[0];
+-					in->win_ctime[0] = oh->win_ctime[0];
+-					in->win_mtime[0] = oh->win_mtime[0];
+-					in->win_atime[1] = oh->win_atime[1];
+-					in->win_ctime[1] = oh->win_ctime[1];
+-					in->win_mtime[1] = oh->win_mtime[1];
+-#else
+-					in->yst_uid = oh->yst_uid;
+-					in->yst_gid = oh->yst_gid;
+-					in->yst_atime = oh->yst_atime;
+-					in->yst_mtime = oh->yst_mtime;
+-					in->yst_ctime = oh->yst_ctime;
+-					in->yst_rdev = oh->yst_rdev;
+-#endif
+-					in->hdrChunk = chunk;
+-					in->serial = tags.serialNumber;
++				memcpy(&localBuffer[start], buffer, nToCopy);
+ 
+-					yaffs_SetObjectName(in, oh->name);
+-					in->dirty = 0;
++				chunkWritten =
++				    yaffs_wr_data_obj(in, chunk,
++								 localBuffer,
++								 nToWriteBack,
++								 0);
+ 
+-					/* directory stuff...
+-					 * hook up to parent
+-					 */
++				yaffs_release_temp_buffer(dev, localBuffer,
++							__LINE__);
+ 
+-					parent =
+-					    yaffs_FindOrCreateObjectByNumber
+-					    (dev, oh->parentObjectId,
+-					     YAFFS_OBJECT_TYPE_DIRECTORY);
+-					if (!parent)
+-						alloc_failed = 1;
+-					if (parent && parent->variantType ==
+-					    YAFFS_OBJECT_TYPE_UNKNOWN) {
+-						/* Set up as a directory */
+-						parent->variantType =
+-							YAFFS_OBJECT_TYPE_DIRECTORY;
+-						YINIT_LIST_HEAD(&parent->variant.
+-								directoryVariant.
+-								children);
+-					} else if (!parent || parent->variantType !=
+-						   YAFFS_OBJECT_TYPE_DIRECTORY) {
+-						/* Hoosterman, another problem....
+-						 * We're trying to use a non-directory as a directory
+-						 */
++			}
+ 
+-						T(YAFFS_TRACE_ERROR,
+-						  (TSTR
+-						   ("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
+-						    TENDSTR)));
+-						parent = dev->lostNFoundDir;
+-					}
++		} else {
++			/* A full chunk. Write directly from the supplied buffer. */
+ 
+-					yaffs_AddObjectToDirectory(parent, in);
+ 
+-					if (0 && (parent == dev->deletedDir ||
+-						  parent == dev->unlinkedDir)) {
+-						in->deleted = 1;	/* If it is unlinked at start up then it wants deleting */
+-						dev->nDeletedFiles++;
+-					}
+-					/* Note re hardlinks.
+-					 * Since we might scan a hardlink before its equivalent object is scanned
+-					 * we put them all in a list.
+-					 * After scanning is complete, we should have all the objects, so we run through this
+-					 * list and fix up all the chains.
+-					 */
+ 
+-					switch (in->variantType) {
+-					case YAFFS_OBJECT_TYPE_UNKNOWN:
+-						/* Todo got a problem */
+-						break;
+-					case YAFFS_OBJECT_TYPE_FILE:
+-						if (dev->useHeaderFileSize)
+-
+-							in->variant.fileVariant.
+-							    fileSize =
+-							    oh->fileSize;
+-
+-						break;
+-					case YAFFS_OBJECT_TYPE_HARDLINK:
+-						in->variant.hardLinkVariant.
+-							equivalentObjectId =
+-							oh->equivalentObjectId;
+-						in->hardLinks.next =
+-							(struct ylist_head *)
+-							hardList;
+-						hardList = in;
+-						break;
+-					case YAFFS_OBJECT_TYPE_DIRECTORY:
+-						/* Do nothing */
+-						break;
+-					case YAFFS_OBJECT_TYPE_SPECIAL:
+-						/* Do nothing */
+-						break;
+-					case YAFFS_OBJECT_TYPE_SYMLINK:
+-						in->variant.symLinkVariant.alias =
+-						    yaffs_CloneString(oh->alias);
+-						if (!in->variant.symLinkVariant.alias)
+-							alloc_failed = 1;
+-						break;
+-					}
++			chunkWritten =
++			    yaffs_wr_data_obj(in, chunk, buffer,
++							 dev->data_bytes_per_chunk,
++							 0);
+ 
+-/*
+-					if (parent == dev->deletedDir) {
+-						yaffs_DestroyObject(in);
+-						bi->hasShrinkHeader = 1;
+-					}
+-*/
+-				}
+-			}
++			/* Since we've overwritten the cached data, we better invalidate it. */
++			yaffs_invalidate_chunk_cache(in, chunk);
+ 		}
+ 
+-		if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
+-			/* If we got this far while scanning, then the block is fully allocated.*/
+-			state = YAFFS_BLOCK_STATE_FULL;
++		if (chunkWritten >= 0) {
++			n -= nToCopy;
++			offset += nToCopy;
++			buffer += nToCopy;
++			nDone += nToCopy;
+ 		}
+ 
+-		bi->blockState = state;
++	}
+ 
+-		/* Now let's see if it was dirty */
+-		if (bi->pagesInUse == 0 &&
+-		    !bi->hasShrinkHeader &&
+-		    bi->blockState == YAFFS_BLOCK_STATE_FULL) {
+-			yaffs_BlockBecameDirty(dev, blk);
+-		}
++	/* Update file object */
+ 
+-	}
++	if ((startOfWrite + nDone) > in->variant.file_variant.file_size)
++		in->variant.file_variant.file_size = (startOfWrite + nDone);
+ 
++	in->dirty = 1;
+ 
+-	/* Ok, we've done all the scanning.
+-	 * Fix up the hard link chains.
+-	 * We should now have scanned all the objects, now it's time to add these
+-	 * hardlinks.
+-	 */
++	return nDone;
++}
+ 
+-	yaffs_HardlinkFixup(dev, hardList);
++int yaffs_wr_file(yaffs_obj_t *in, const __u8 *buffer, loff_t offset,
++			int n_bytes, int write_trhrough)
++{
++	yaffs2_handle_hole(in,offset);
++	return yaffs_do_file_wr(in,buffer,offset,n_bytes,write_trhrough);
++}
+ 
+-	/* Fix up any shadowed objects */
+-	{
+-		struct yaffs_ShadowFixerStruct *fixer;
+-		yaffs_Object *obj;
+-
+-		while (shadowFixerList) {
+-			fixer = shadowFixerList;
+-			shadowFixerList = fixer->next;
+-			/* Complete the rename transaction by deleting the shadowed object
+-			 * then setting the object header to unshadowed.
+-			 */
+-			obj = yaffs_FindObjectByNumber(dev, fixer->shadowedId);
+-			if (obj)
+-				yaffs_DeleteObject(obj);
+ 
+-			obj = yaffs_FindObjectByNumber(dev, fixer->objectId);
+ 
+-			if (obj)
+-				yaffs_UpdateObjectHeader(obj, NULL, 1, 0, 0);
++/* ---------------------- File resizing stuff ------------------ */
+ 
+-			YFREE(fixer);
+-		}
+-	}
++static void yaffs_prune_chunks(yaffs_obj_t *in, int new_size)
++{
+ 
+-	yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
++	yaffs_dev_t *dev = in->my_dev;
++	int oldFileSize = in->variant.file_variant.file_size;
+ 
+-	if (alloc_failed)
+-		return YAFFS_FAIL;
++	int lastDel = 1 + (oldFileSize - 1) / dev->data_bytes_per_chunk;
++
++	int startDel = 1 + (new_size + dev->data_bytes_per_chunk - 1) /
++	    dev->data_bytes_per_chunk;
++	int i;
++	int chunk_id;
+ 
+-	T(YAFFS_TRACE_SCAN, (TSTR("yaffs_Scan ends" TENDSTR)));
++	/* Delete backwards so that we don't end up with holes if
++	 * power is lost part-way through the operation.
++	 */
++	for (i = lastDel; i >= startDel; i--) {
++		/* NB this could be optimised somewhat,
++		 * eg. could retrieve the tags and write them without
++		 * using yaffs_chunk_del
++		 */
+ 
++		chunk_id = yaffs_find_del_file_chunk(in, i, NULL);
++		if (chunk_id > 0) {
++			if (chunk_id <
++			    (dev->internal_start_block * dev->param.chunks_per_block)
++			    || chunk_id >=
++			    ((dev->internal_end_block +
++			      1) * dev->param.chunks_per_block)) {
++				T(YAFFS_TRACE_ALWAYS,
++				  (TSTR("Found daft chunk_id %d for %d" TENDSTR),
++				   chunk_id, i));
++			} else {
++				in->n_data_chunks--;
++				yaffs_chunk_del(dev, chunk_id, 1, __LINE__);
++			}
++		}
++	}
+ 
+-	return YAFFS_OK;
+ }
+ 
+-static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in)
+-{
+-	__u8 *chunkData;
+-	yaffs_ObjectHeader *oh;
+-	yaffs_Device *dev;
+-	yaffs_ExtendedTags tags;
+-	int result;
+-	int alloc_failed = 0;
+ 
+-	if (!in)
+-		return;
++void yaffs_resize_file_down( yaffs_obj_t *obj, loff_t new_size)
++{
++	int newFullChunks;
++	__u32 new_sizeOfPartialChunk;
++	yaffs_dev_t *dev = obj->my_dev;
+ 
+-	dev = in->myDev;
++	yaffs_addr_to_chunk(dev, new_size, &newFullChunks, &new_sizeOfPartialChunk);
+ 
+-#if 0
+-	T(YAFFS_TRACE_SCAN, (TSTR("details for object %d %s loaded" TENDSTR),
+-		in->objectId,
+-		in->lazyLoaded ? "not yet" : "already"));
+-#endif
++	yaffs_prune_chunks(obj, new_size);
+ 
+-	if (in->lazyLoaded && in->hdrChunk > 0) {
+-		in->lazyLoaded = 0;
+-		chunkData = yaffs_GetTempBuffer(dev, __LINE__);
++	if (new_sizeOfPartialChunk != 0) {
++		int lastChunk = 1 + newFullChunks;
++		__u8 *localBuffer = yaffs_get_temp_buffer(dev, __LINE__);
+ 
+-		result = yaffs_ReadChunkWithTagsFromNAND(dev, in->hdrChunk, chunkData, &tags);
+-		oh = (yaffs_ObjectHeader *) chunkData;
++		/* Got to read and rewrite the last chunk with its new size and zero pad */
++		yaffs_rd_data_obj(obj, lastChunk, localBuffer);
++		memset(localBuffer + new_sizeOfPartialChunk, 0,
++			dev->data_bytes_per_chunk - new_sizeOfPartialChunk);
+ 
+-		in->yst_mode = oh->yst_mode;
+-#ifdef CONFIG_YAFFS_WINCE
+-		in->win_atime[0] = oh->win_atime[0];
+-		in->win_ctime[0] = oh->win_ctime[0];
+-		in->win_mtime[0] = oh->win_mtime[0];
+-		in->win_atime[1] = oh->win_atime[1];
+-		in->win_ctime[1] = oh->win_ctime[1];
+-		in->win_mtime[1] = oh->win_mtime[1];
+-#else
+-		in->yst_uid = oh->yst_uid;
+-		in->yst_gid = oh->yst_gid;
+-		in->yst_atime = oh->yst_atime;
+-		in->yst_mtime = oh->yst_mtime;
+-		in->yst_ctime = oh->yst_ctime;
+-		in->yst_rdev = oh->yst_rdev;
++		yaffs_wr_data_obj(obj, lastChunk, localBuffer,
++					     new_sizeOfPartialChunk, 1);
+ 
+-#endif
+-		yaffs_SetObjectName(in, oh->name);
++		yaffs_release_temp_buffer(dev, localBuffer, __LINE__);
++	}
+ 
+-		if (in->variantType == YAFFS_OBJECT_TYPE_SYMLINK) {
+-			in->variant.symLinkVariant.alias =
+-						    yaffs_CloneString(oh->alias);
+-			if (!in->variant.symLinkVariant.alias)
+-				alloc_failed = 1; /* Not returned to caller */
+-		}
++	obj->variant.file_variant.file_size = new_size;
+ 
+-		yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
+-	}
++	yaffs_prune_tree(dev, &obj->variant.file_variant);
+ }
+ 
+-static int yaffs_ScanBackwards(yaffs_Device *dev)
+-{
+-	yaffs_ExtendedTags tags;
+-	int blk;
+-	int blockIterator;
+-	int startIterator;
+-	int endIterator;
+-	int nBlocksToScan = 0;
+-
+-	int chunk;
+-	int result;
+-	int c;
+-	int deleted;
+-	yaffs_BlockState state;
+-	yaffs_Object *hardList = NULL;
+-	yaffs_BlockInfo *bi;
+-	__u32 sequenceNumber;
+-	yaffs_ObjectHeader *oh;
+-	yaffs_Object *in;
+-	yaffs_Object *parent;
+-	int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
+-	int itsUnlinked;
+-	__u8 *chunkData;
+ 
+-	int fileSize;
+-	int isShrink;
+-	int foundChunksInBlock;
+-	int equivalentObjectId;
+-	int alloc_failed = 0;
++int yaffs_resize_file(yaffs_obj_t *in, loff_t new_size)
++{
++	yaffs_dev_t *dev = in->my_dev;
++	int oldFileSize = in->variant.file_variant.file_size;
+ 
++	yaffs_flush_file_cache(in);
++	yaffs_invalidate_whole_cache(in);
+ 
+-	yaffs_BlockIndex *blockIndex = NULL;
+-	int altBlockIndex = 0;
++	yaffs_check_gc(dev,0);
+ 
+-	if (!dev->isYaffs2) {
+-		T(YAFFS_TRACE_SCAN,
+-		  (TSTR("yaffs_ScanBackwards is only for YAFFS2!" TENDSTR)));
++	if (in->variant_type != YAFFS_OBJECT_TYPE_FILE)
+ 		return YAFFS_FAIL;
+-	}
+ 
+-	T(YAFFS_TRACE_SCAN,
+-	  (TSTR
+-	   ("yaffs_ScanBackwards starts  intstartblk %d intendblk %d..."
+-	    TENDSTR), dev->internalStartBlock, dev->internalEndBlock));
++	if (new_size == oldFileSize)
++		return YAFFS_OK;
++		
++	if(new_size > oldFileSize){
++		yaffs2_handle_hole(in,new_size);
++		in->variant.file_variant.file_size = new_size;
++	} else {
++		/* new_size < oldFileSize */ 
++		yaffs_resize_file_down(in, new_size);
++	} 
+ 
++	/* Write a new object header to reflect the resize.
++	 * show we've shrunk the file, if need be
++	 * Do this only if the file is not in the deleted directories
++	 * and is not shadowed.
++	 */
++	if (in->parent &&
++	    !in->is_shadowed &&
++	    in->parent->obj_id != YAFFS_OBJECTID_UNLINKED &&
++	    in->parent->obj_id != YAFFS_OBJECTID_DELETED)
++		yaffs_update_oh(in, NULL, 0, 0, 0, NULL);
+ 
+-	dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER;
+ 
+-	blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex));
++	return YAFFS_OK;
++}
+ 
+-	if (!blockIndex) {
+-		blockIndex = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockIndex));
+-		altBlockIndex = 1;
+-	}
++loff_t yaffs_get_file_size(yaffs_obj_t *obj)
++{
++	YCHAR *alias = NULL;
++	obj = yaffs_get_equivalent_obj(obj);
+ 
+-	if (!blockIndex) {
+-		T(YAFFS_TRACE_SCAN,
+-		  (TSTR("yaffs_Scan() could not allocate block index!" TENDSTR)));
+-		return YAFFS_FAIL;
++	switch (obj->variant_type) {
++	case YAFFS_OBJECT_TYPE_FILE:
++		return obj->variant.file_variant.file_size;
++	case YAFFS_OBJECT_TYPE_SYMLINK:
++		alias = obj->variant.symlink_variant.alias;
++		if(!alias)
++			return 0;
++		return yaffs_strnlen(alias,YAFFS_MAX_ALIAS_LENGTH);
++	default:
++		return 0;
+ 	}
++}
+ 
+-	dev->blocksInCheckpoint = 0;
+-
+-	chunkData = yaffs_GetTempBuffer(dev, __LINE__);
+-
+-	/* Scan all the blocks to determine their state */
+-	for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) {
+-		bi = yaffs_GetBlockInfo(dev, blk);
+-		yaffs_ClearChunkBits(dev, blk);
+-		bi->pagesInUse = 0;
+-		bi->softDeletions = 0;
+-
+-		yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber);
+ 
+-		bi->blockState = state;
+-		bi->sequenceNumber = sequenceNumber;
+ 
+-		if (bi->sequenceNumber == YAFFS_SEQUENCE_CHECKPOINT_DATA)
+-			bi->blockState = state = YAFFS_BLOCK_STATE_CHECKPOINT;
+-		if (bi->sequenceNumber == YAFFS_SEQUENCE_BAD_BLOCK)
+-			bi->blockState = state = YAFFS_BLOCK_STATE_DEAD;
++int yaffs_flush_file(yaffs_obj_t *in, int update_time, int data_sync)
++{
++	int retVal;
++	if (in->dirty) {
++		yaffs_flush_file_cache(in);
++		if(data_sync) /* Only sync data */
++			retVal=YAFFS_OK;
++		else {
++			if (update_time) {
++#ifdef CONFIG_YAFFS_WINCE
++				yfsd_win_file_time_now(in->win_mtime);
++#else
+ 
+-		T(YAFFS_TRACE_SCAN_DEBUG,
+-		  (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk,
+-		   state, sequenceNumber));
++				in->yst_mtime = Y_CURRENT_TIME;
+ 
++#endif
++			}
+ 
+-		if (state == YAFFS_BLOCK_STATE_CHECKPOINT) {
+-			dev->blocksInCheckpoint++;
++			retVal = (yaffs_update_oh(in, NULL, 0, 0, 0, NULL) >=
++				0) ? YAFFS_OK : YAFFS_FAIL;
++		}
++	} else {
++		retVal = YAFFS_OK;
++	}
+ 
+-		} else if (state == YAFFS_BLOCK_STATE_DEAD) {
+-			T(YAFFS_TRACE_BAD_BLOCKS,
+-			  (TSTR("block %d is bad" TENDSTR), blk));
+-		} else if (state == YAFFS_BLOCK_STATE_EMPTY) {
+-			T(YAFFS_TRACE_SCAN_DEBUG,
+-			  (TSTR("Block empty " TENDSTR)));
+-			dev->nErasedBlocks++;
+-			dev->nFreeChunks += dev->nChunksPerBlock;
+-		} else if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
++	return retVal;
+ 
+-			/* Determine the highest sequence number */
+-			if (sequenceNumber >= YAFFS_LOWEST_SEQUENCE_NUMBER &&
+-			    sequenceNumber < YAFFS_HIGHEST_SEQUENCE_NUMBER) {
++}
+ 
+-				blockIndex[nBlocksToScan].seq = sequenceNumber;
+-				blockIndex[nBlocksToScan].block = blk;
++static int yaffs_generic_obj_del(yaffs_obj_t *in)
++{
+ 
+-				nBlocksToScan++;
++	/* First off, invalidate the file's data in the cache, without flushing. */
++	yaffs_invalidate_whole_cache(in);
+ 
+-				if (sequenceNumber >= dev->sequenceNumber)
+-					dev->sequenceNumber = sequenceNumber;
+-			} else {
+-				/* TODO: Nasty sequence number! */
+-				T(YAFFS_TRACE_SCAN,
+-				  (TSTR
+-				   ("Block scanning block %d has bad sequence number %d"
+-				    TENDSTR), blk, sequenceNumber));
++	if (in->my_dev->param.is_yaffs2 && (in->parent != in->my_dev->del_dir)) {
++		/* Move to the unlinked directory so we have a record that it was deleted. */
++		yaffs_change_obj_name(in, in->my_dev->del_dir, _Y("deleted"), 0, 0);
+ 
+-			}
+-		}
+ 	}
+ 
+-	T(YAFFS_TRACE_SCAN,
+-	(TSTR("%d blocks to be sorted..." TENDSTR), nBlocksToScan));
++	yaffs_remove_obj_from_dir(in);
++	yaffs_chunk_del(in->my_dev, in->hdr_chunk, 1, __LINE__);
++	in->hdr_chunk = 0;
+ 
++	yaffs_free_obj(in);
++	return YAFFS_OK;
+ 
++}
+ 
+-	YYIELD();
++/* yaffs_del_file deletes the whole file data
++ * and the inode associated with the file.
++ * It does not delete the links associated with the file.
++ */
++static int yaffs_unlink_file_if_needed(yaffs_obj_t *in)
++{
+ 
+-	/* Sort the blocks */
+-#ifndef CONFIG_YAFFS_USE_OWN_SORT
+-	{
+-		/* Use qsort now. */
+-		yaffs_qsort(blockIndex, nBlocksToScan, sizeof(yaffs_BlockIndex), ybicmp);
+-	}
+-#else
+-	{
+-		/* Dungy old bubble sort... */
++	int retVal;
++	int immediateDeletion = 0;
++	yaffs_dev_t *dev = in->my_dev;
+ 
+-		yaffs_BlockIndex temp;
+-		int i;
+-		int j;
++	if (!in->my_inode)
++		immediateDeletion = 1;
+ 
+-		for (i = 0; i < nBlocksToScan; i++)
+-			for (j = i + 1; j < nBlocksToScan; j++)
+-				if (blockIndex[i].seq > blockIndex[j].seq) {
+-					temp = blockIndex[j];
+-					blockIndex[j] = blockIndex[i];
+-					blockIndex[i] = temp;
+-				}
++	if (immediateDeletion) {
++		retVal =
++		    yaffs_change_obj_name(in, in->my_dev->del_dir,
++					   _Y("deleted"), 0, 0);
++		T(YAFFS_TRACE_TRACING,
++		  (TSTR("yaffs: immediate deletion of file %d" TENDSTR),
++		   in->obj_id));
++		in->deleted = 1;
++		in->my_dev->n_deleted_files++;
++		if (dev->param.disable_soft_del || dev->param.is_yaffs2)
++			yaffs_resize_file(in, 0);
++		yaffs_soft_del_file(in);
++	} else {
++		retVal =
++		    yaffs_change_obj_name(in, in->my_dev->unlinked_dir,
++					   _Y("unlinked"), 0, 0);
+ 	}
+-#endif
+ 
+-	YYIELD();
+ 
+-	T(YAFFS_TRACE_SCAN, (TSTR("...done" TENDSTR)));
++	return retVal;
++}
+ 
+-	/* Now scan the blocks looking at the data. */
+-	startIterator = 0;
+-	endIterator = nBlocksToScan - 1;
+-	T(YAFFS_TRACE_SCAN_DEBUG,
+-	  (TSTR("%d blocks to be scanned" TENDSTR), nBlocksToScan));
++int yaffs_del_file(yaffs_obj_t *in)
++{
++	int retVal = YAFFS_OK;
++	int deleted; /* Need to cache value on stack if in is freed */
++	yaffs_dev_t *dev = in->my_dev;
+ 
+-	/* For each block.... backwards */
+-	for (blockIterator = endIterator; !alloc_failed && blockIterator >= startIterator;
+-			blockIterator--) {
+-		/* Cooperative multitasking! This loop can run for so
+-		   long that watchdog timers expire. */
+-		YYIELD();
++	if (dev->param.disable_soft_del || dev->param.is_yaffs2)
++		yaffs_resize_file(in, 0);
+ 
+-		/* get the block to scan in the correct order */
+-		blk = blockIndex[blockIterator].block;
++	if (in->n_data_chunks > 0) {
++		/* Use soft deletion if there is data in the file.
++		 * That won't be the case if it has been resized to zero.
++		 */
++		if (!in->unlinked)
++			retVal = yaffs_unlink_file_if_needed(in);
+ 
+-		bi = yaffs_GetBlockInfo(dev, blk);
++		deleted = in->deleted;
+ 
++		if (retVal == YAFFS_OK && in->unlinked && !in->deleted) {
++			in->deleted = 1;
++			deleted = 1;
++			in->my_dev->n_deleted_files++;
++			yaffs_soft_del_file(in);
++		}
++		return deleted ? YAFFS_OK : YAFFS_FAIL;
++	} else {
++		/* The file has no data chunks so we toss it immediately */
++		yaffs_free_tnode(in->my_dev, in->variant.file_variant.top);
++		in->variant.file_variant.top = NULL;
++		yaffs_generic_obj_del(in);
+ 
+-		state = bi->blockState;
++		return YAFFS_OK;
++	}
++}
+ 
+-		deleted = 0;
++static int yaffs_is_non_empty_dir(yaffs_obj_t *obj)
++{
++	return (obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) &&
++		!(ylist_empty(&obj->variant.dir_variant.children));
++}
+ 
+-		/* For each chunk in each block that needs scanning.... */
+-		foundChunksInBlock = 0;
+-		for (c = dev->nChunksPerBlock - 1;
+-		     !alloc_failed && c >= 0 &&
+-		     (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
+-		      state == YAFFS_BLOCK_STATE_ALLOCATING); c--) {
+-			/* Scan backwards...
+-			 * Read the tags and decide what to do
+-			 */
++static int yaffs_del_dir(yaffs_obj_t *obj)
++{
++	/* First check that the directory is empty. */
++	if (yaffs_is_non_empty_dir(obj))
++		return YAFFS_FAIL;
+ 
+-			chunk = blk * dev->nChunksPerBlock + c;
++	return yaffs_generic_obj_del(obj);
++}
+ 
+-			result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL,
+-							&tags);
++static int yaffs_del_symlink(yaffs_obj_t *in)
++{
++	if(in->variant.symlink_variant.alias)
++		YFREE(in->variant.symlink_variant.alias);
++	in->variant.symlink_variant.alias=NULL;
+ 
+-			/* Let's have a good look at this chunk... */
++	return yaffs_generic_obj_del(in);
++}
+ 
+-			if (!tags.chunkUsed) {
+-				/* An unassigned chunk in the block.
+-				 * If there are used chunks after this one, then
+-				 * it is a chunk that was skipped due to failing the erased
+-				 * check. Just skip it so that it can be deleted.
+-				 * But, more typically, We get here when this is an unallocated
+-				 * chunk and his means that either the block is empty or
+-				 * this is the one being allocated from
+-				 */
++static int yaffs_del_link(yaffs_obj_t *in)
++{
++	/* remove this hardlink from the list assocaited with the equivalent
++	 * object
++	 */
++	ylist_del_init(&in->hard_links);
++	return yaffs_generic_obj_del(in);
++}
+ 
+-				if (foundChunksInBlock) {
+-					/* This is a chunk that was skipped due to failing the erased check */
+-				} else if (c == 0) {
+-					/* We're looking at the first chunk in the block so the block is unused */
+-					state = YAFFS_BLOCK_STATE_EMPTY;
+-					dev->nErasedBlocks++;
+-				} else {
+-					if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
+-					    state == YAFFS_BLOCK_STATE_ALLOCATING) {
+-						if (dev->sequenceNumber == bi->sequenceNumber) {
+-							/* this is the block being allocated from */
+-
+-							T(YAFFS_TRACE_SCAN,
+-							  (TSTR
+-							   (" Allocating from %d %d"
+-							    TENDSTR), blk, c));
+-
+-							state = YAFFS_BLOCK_STATE_ALLOCATING;
+-							dev->allocationBlock = blk;
+-							dev->allocationPage = c;
+-							dev->allocationBlockFinder = blk;
+-						} else {
+-							/* This is a partially written block that is not
+-							 * the current allocation block. This block must have
+-							 * had a write failure, so set up for retirement.
+-							 */
+-
+-							 /* bi->needsRetiring = 1; ??? TODO */
+-							 bi->gcPrioritise = 1;
+-
+-							 T(YAFFS_TRACE_ALWAYS,
+-							 (TSTR("Partially written block %d detected" TENDSTR),
+-							 blk));
+-						}
+-					}
+-				}
++int yaffs_del_obj(yaffs_obj_t *obj)
++{
++int retVal = -1;
++	switch (obj->variant_type) {
++	case YAFFS_OBJECT_TYPE_FILE:
++		retVal = yaffs_del_file(obj);
++		break;
++	case YAFFS_OBJECT_TYPE_DIRECTORY:
++		if(!ylist_empty(&obj->variant.dir_variant.dirty)){
++			T(YAFFS_TRACE_BACKGROUND, (TSTR("Remove object %d from dirty directories" TENDSTR),obj->obj_id));
++			ylist_del_init(&obj->variant.dir_variant.dirty);
++		}
++		return yaffs_del_dir(obj);
++		break;
++	case YAFFS_OBJECT_TYPE_SYMLINK:
++		retVal = yaffs_del_symlink(obj);
++		break;
++	case YAFFS_OBJECT_TYPE_HARDLINK:
++		retVal = yaffs_del_link(obj);
++		break;
++	case YAFFS_OBJECT_TYPE_SPECIAL:
++		retVal = yaffs_generic_obj_del(obj);
++		break;
++	case YAFFS_OBJECT_TYPE_UNKNOWN:
++		retVal = 0;
++		break;		/* should not happen. */
++	}
+ 
+-				dev->nFreeChunks++;
++	return retVal;
++}
+ 
+-			} else if (tags.eccResult == YAFFS_ECC_RESULT_UNFIXED) {
+-				T(YAFFS_TRACE_SCAN,
+-				  (TSTR(" Unfixed ECC in chunk(%d:%d), chunk ignored"TENDSTR),
+-				  blk, c));
+-
+-				  dev->nFreeChunks++;
+-
+-			} else if (tags.chunkId > 0) {
+-				/* chunkId > 0 so it is a data chunk... */
+-				unsigned int endpos;
+-				__u32 chunkBase =
+-				    (tags.chunkId - 1) * dev->nDataBytesPerChunk;
+-
+-				foundChunksInBlock = 1;
+-
+-
+-				yaffs_SetChunkBit(dev, blk, c);
+-				bi->pagesInUse++;
+-
+-				in = yaffs_FindOrCreateObjectByNumber(dev,
+-								      tags.
+-								      objectId,
+-								      YAFFS_OBJECT_TYPE_FILE);
+-				if (!in) {
+-					/* Out of memory */
+-					alloc_failed = 1;
+-				}
++static int yaffs_unlink_worker(yaffs_obj_t *obj)
++{
+ 
+-				if (in &&
+-				    in->variantType == YAFFS_OBJECT_TYPE_FILE
+-				    && chunkBase <
+-				    in->variant.fileVariant.shrinkSize) {
+-					/* This has not been invalidated by a resize */
+-					if (!yaffs_PutChunkIntoFile(in, tags.chunkId,
+-							       chunk, -1)) {
+-						alloc_failed = 1;
+-					}
++	int immediateDeletion = 0;
+ 
+-					/* File size is calculated by looking at the data chunks if we have not
+-					 * seen an object header yet. Stop this practice once we find an object header.
+-					 */
+-					endpos =
+-					    (tags.chunkId -
+-					     1) * dev->nDataBytesPerChunk +
+-					    tags.byteCount;
+-
+-					if (!in->valid &&	/* have not got an object header yet */
+-					    in->variant.fileVariant.
+-					    scannedFileSize < endpos) {
+-						in->variant.fileVariant.
+-						    scannedFileSize = endpos;
+-						in->variant.fileVariant.
+-						    fileSize =
+-						    in->variant.fileVariant.
+-						    scannedFileSize;
+-					}
++	if (!obj->my_inode)
++		immediateDeletion = 1;
+ 
+-				} else if (in) {
+-					/* This chunk has been invalidated by a resize, so delete */
+-					yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
++	if(obj)
++		yaffs_update_parent(obj->parent);
+ 
+-				}
+-			} else {
+-				/* chunkId == 0, so it is an ObjectHeader.
+-				 * Thus, we read in the object header and make the object
+-				 */
+-				foundChunksInBlock = 1;
++	if (obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK) {
++		return yaffs_del_link(obj);
++	} else if (!ylist_empty(&obj->hard_links)) {
++		/* Curve ball: We're unlinking an object that has a hardlink.
++		 *
++		 * This problem arises because we are not strictly following
++		 * The Linux link/inode model.
++		 *
++		 * We can't really delete the object.
++		 * Instead, we do the following:
++		 * - Select a hardlink.
++		 * - Unhook it from the hard links
++		 * - Move it from its parent directory (so that the rename can work)
++		 * - Rename the object to the hardlink's name.
++		 * - Delete the hardlink
++		 */
+ 
+-				yaffs_SetChunkBit(dev, blk, c);
+-				bi->pagesInUse++;
++		yaffs_obj_t *hl;
++		yaffs_obj_t *parent;
++		int retVal;
++		YCHAR name[YAFFS_MAX_NAME_LENGTH + 1];
+ 
+-				oh = NULL;
+-				in = NULL;
++		hl = ylist_entry(obj->hard_links.next, yaffs_obj_t, hard_links);
+ 
+-				if (tags.extraHeaderInfoAvailable) {
+-					in = yaffs_FindOrCreateObjectByNumber
+-					    (dev, tags.objectId,
+-					     tags.extraObjectType);
+-					if (!in)
+-						alloc_failed = 1;
+-				}
++		yaffs_get_obj_name(hl, name, YAFFS_MAX_NAME_LENGTH + 1);
++		parent = hl->parent;
+ 
+-				if (!in ||
+-#ifdef CONFIG_YAFFS_DISABLE_LAZY_LOAD
+-				    !in->valid ||
+-#endif
+-				    tags.extraShadows ||
+-				    (!in->valid &&
+-				    (tags.objectId == YAFFS_OBJECTID_ROOT ||
+-				     tags.objectId == YAFFS_OBJECTID_LOSTNFOUND))) {
+-
+-					/* If we don't have  valid info then we need to read the chunk
+-					 * TODO In future we can probably defer reading the chunk and
+-					 * living with invalid data until needed.
+-					 */
++		ylist_del_init(&hl->hard_links);
+ 
+-					result = yaffs_ReadChunkWithTagsFromNAND(dev,
+-									chunk,
+-									chunkData,
+-									NULL);
+-
+-					oh = (yaffs_ObjectHeader *) chunkData;
+-
+-					if (dev->inbandTags) {
+-						/* Fix up the header if they got corrupted by inband tags */
+-						oh->shadowsObject = oh->inbandShadowsObject;
+-						oh->isShrink = oh->inbandIsShrink;
+-					}
++ 		yaffs_add_obj_to_dir(obj->my_dev->unlinked_dir, hl);
+ 
+-					if (!in) {
+-						in = yaffs_FindOrCreateObjectByNumber(dev, tags.objectId, oh->type);
+-						if (!in)
+-							alloc_failed = 1;
+-					}
++		retVal = yaffs_change_obj_name(obj,parent, name, 0, 0);
+ 
+-				}
++		if (retVal == YAFFS_OK)
++			retVal = yaffs_generic_obj_del(hl);
+ 
+-				if (!in) {
+-					/* TODO Hoosterman we have a problem! */
+-					T(YAFFS_TRACE_ERROR,
+-					  (TSTR
+-					   ("yaffs tragedy: Could not make object for object  %d at chunk %d during scan"
+-					    TENDSTR), tags.objectId, chunk));
+-					continue;
+-				}
++		return retVal;
+ 
+-				if (in->valid) {
+-					/* We have already filled this one.
+-					 * We have a duplicate that will be discarded, but
+-					 * we first have to suck out resize info if it is a file.
+-					 */
++	} else if (immediateDeletion) {
++		switch (obj->variant_type) {
++		case YAFFS_OBJECT_TYPE_FILE:
++			return yaffs_del_file(obj);
++			break;
++		case YAFFS_OBJECT_TYPE_DIRECTORY:
++			ylist_del_init(&obj->variant.dir_variant.dirty);
++			return yaffs_del_dir(obj);
++			break;
++		case YAFFS_OBJECT_TYPE_SYMLINK:
++			return yaffs_del_symlink(obj);
++			break;
++		case YAFFS_OBJECT_TYPE_SPECIAL:
++			return yaffs_generic_obj_del(obj);
++			break;
++		case YAFFS_OBJECT_TYPE_HARDLINK:
++		case YAFFS_OBJECT_TYPE_UNKNOWN:
++		default:
++			return YAFFS_FAIL;
++		}
++	} else if(yaffs_is_non_empty_dir(obj))
++		return YAFFS_FAIL;
++	else
++		return yaffs_change_obj_name(obj, obj->my_dev->unlinked_dir,
++					   _Y("unlinked"), 0, 0);
++}
+ 
+-					if ((in->variantType == YAFFS_OBJECT_TYPE_FILE) &&
+-					     ((oh &&
+-					       oh->type == YAFFS_OBJECT_TYPE_FILE) ||
+-					      (tags.extraHeaderInfoAvailable  &&
+-					       tags.extraObjectType == YAFFS_OBJECT_TYPE_FILE))) {
+-						__u32 thisSize =
+-						    (oh) ? oh->fileSize : tags.
+-						    extraFileLength;
+-						__u32 parentObjectId =
+-						    (oh) ? oh->
+-						    parentObjectId : tags.
+-						    extraParentObjectId;
+-
+-
+-						isShrink =
+-						    (oh) ? oh->isShrink : tags.
+-						    extraIsShrinkHeader;
+ 
+-						/* If it is deleted (unlinked at start also means deleted)
+-						 * we treat the file size as being zeroed at this point.
+-						 */
+-						if (parentObjectId ==
+-						    YAFFS_OBJECTID_DELETED
+-						    || parentObjectId ==
+-						    YAFFS_OBJECTID_UNLINKED) {
+-							thisSize = 0;
+-							isShrink = 1;
+-						}
++static int yaffs_unlink_obj(yaffs_obj_t *obj)
++{
+ 
+-						if (isShrink &&
+-						    in->variant.fileVariant.
+-						    shrinkSize > thisSize) {
+-							in->variant.fileVariant.
+-							    shrinkSize =
+-							    thisSize;
+-						}
++	if (obj && obj->unlink_allowed)
++		return yaffs_unlink_worker(obj);
+ 
+-						if (isShrink)
+-							bi->hasShrinkHeader = 1;
++	return YAFFS_FAIL;
+ 
+-					}
+-					/* Use existing - destroy this one. */
+-					yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
++}
++int yaffs_unlinker(yaffs_obj_t *dir, const YCHAR *name)
++{
++	yaffs_obj_t *obj;
+ 
+-				}
++	obj = yaffs_find_by_name(dir, name);
++	return yaffs_unlink_obj(obj);
++}
+ 
+-				if (!in->valid && in->variantType !=
+-				    (oh ? oh->type : tags.extraObjectType))
+-					T(YAFFS_TRACE_ERROR, (
+-						TSTR("yaffs tragedy: Bad object type, "
+-					    TCONT("%d != %d, for object %d at chunk ")
+-					    TCONT("%d during scan")
+-						TENDSTR), oh ?
+-					    oh->type : tags.extraObjectType,
+-					    in->variantType, tags.objectId,
+-					    chunk));
+-
+-				if (!in->valid &&
+-				    (tags.objectId == YAFFS_OBJECTID_ROOT ||
+-				     tags.objectId ==
+-				     YAFFS_OBJECTID_LOSTNFOUND)) {
+-					/* We only load some info, don't fiddle with directory structure */
+-					in->valid = 1;
++/*----------------------- Initialisation Scanning ---------------------- */
+ 
+-					if (oh) {
+-						in->variantType = oh->type;
++void yaffs_handle_shadowed_obj(yaffs_dev_t *dev, int obj_id,
++				int backward_scanning)
++{
++	yaffs_obj_t *obj;
+ 
+-						in->yst_mode = oh->yst_mode;
+-#ifdef CONFIG_YAFFS_WINCE
+-						in->win_atime[0] = oh->win_atime[0];
+-						in->win_ctime[0] = oh->win_ctime[0];
+-						in->win_mtime[0] = oh->win_mtime[0];
+-						in->win_atime[1] = oh->win_atime[1];
+-						in->win_ctime[1] = oh->win_ctime[1];
+-						in->win_mtime[1] = oh->win_mtime[1];
+-#else
+-						in->yst_uid = oh->yst_uid;
+-						in->yst_gid = oh->yst_gid;
+-						in->yst_atime = oh->yst_atime;
+-						in->yst_mtime = oh->yst_mtime;
+-						in->yst_ctime = oh->yst_ctime;
+-						in->yst_rdev = oh->yst_rdev;
++	if (!backward_scanning) {
++		/* Handle YAFFS1 forward scanning case
++		 * For YAFFS1 we always do the deletion
++		 */
+ 
+-#endif
+-					} else {
+-						in->variantType = tags.extraObjectType;
+-						in->lazyLoaded = 1;
+-					}
++	} else {
++		/* Handle YAFFS2 case (backward scanning)
++		 * If the shadowed object exists then ignore.
++		 */
++		obj = yaffs_find_by_number(dev, obj_id);
++		if(obj)
++			return;
++	}
+ 
+-					in->hdrChunk = chunk;
++	/* Let's create it (if it does not exist) assuming it is a file so that it can do shrinking etc.
++	 * We put it in unlinked dir to be cleaned up after the scanning
++	 */
++	obj =
++	    yaffs_find_or_create_by_number(dev, obj_id,
++					     YAFFS_OBJECT_TYPE_FILE);
++	if (!obj)
++		return;
++	obj->is_shadowed = 1;
++	yaffs_add_obj_to_dir(dev->unlinked_dir, obj);
++	obj->variant.file_variant.shrink_size = 0;
++	obj->valid = 1;		/* So that we don't read any other info for this file */
+ 
+-				} else if (!in->valid) {
+-					/* we need to load this info */
++}
+ 
+-					in->valid = 1;
+-					in->hdrChunk = chunk;
+ 
+-					if (oh) {
+-						in->variantType = oh->type;
++void yaffs_link_fixup(yaffs_dev_t *dev, yaffs_obj_t *hard_list)
++{
++	yaffs_obj_t *hl;
++	yaffs_obj_t *in;
+ 
+-						in->yst_mode = oh->yst_mode;
+-#ifdef CONFIG_YAFFS_WINCE
+-						in->win_atime[0] = oh->win_atime[0];
+-						in->win_ctime[0] = oh->win_ctime[0];
+-						in->win_mtime[0] = oh->win_mtime[0];
+-						in->win_atime[1] = oh->win_atime[1];
+-						in->win_ctime[1] = oh->win_ctime[1];
+-						in->win_mtime[1] = oh->win_mtime[1];
+-#else
+-						in->yst_uid = oh->yst_uid;
+-						in->yst_gid = oh->yst_gid;
+-						in->yst_atime = oh->yst_atime;
+-						in->yst_mtime = oh->yst_mtime;
+-						in->yst_ctime = oh->yst_ctime;
+-						in->yst_rdev = oh->yst_rdev;
+-#endif
++	while (hard_list) {
++		hl = hard_list;
++		hard_list = (yaffs_obj_t *) (hard_list->hard_links.next);
++
++		in = yaffs_find_by_number(dev,
++					      hl->variant.hardlink_variant.
++					      equiv_id);
+ 
+-						if (oh->shadowsObject > 0)
+-							yaffs_HandleShadowedObject(dev,
+-									   oh->
+-									   shadowsObject,
+-									   1);
+-
+-
+-						yaffs_SetObjectName(in, oh->name);
+-						parent =
+-						    yaffs_FindOrCreateObjectByNumber
+-							(dev, oh->parentObjectId,
+-							 YAFFS_OBJECT_TYPE_DIRECTORY);
+-
+-						 fileSize = oh->fileSize;
+-						 isShrink = oh->isShrink;
+-						 equivalentObjectId = oh->equivalentObjectId;
++		if (in) {
++			/* Add the hardlink pointers */
++			hl->variant.hardlink_variant.equiv_obj = in;
++			ylist_add(&hl->hard_links, &in->hard_links);
++		} else {
++			/* Todo Need to report/handle this better.
++			 * Got a problem... hardlink to a non-existant object
++			 */
++			hl->variant.hardlink_variant.equiv_obj = NULL;
++			YINIT_LIST_HEAD(&hl->hard_links);
+ 
+-					} else {
+-						in->variantType = tags.extraObjectType;
+-						parent =
+-						    yaffs_FindOrCreateObjectByNumber
+-							(dev, tags.extraParentObjectId,
+-							 YAFFS_OBJECT_TYPE_DIRECTORY);
+-						 fileSize = tags.extraFileLength;
+-						 isShrink = tags.extraIsShrinkHeader;
+-						 equivalentObjectId = tags.extraEquivalentObjectId;
+-						in->lazyLoaded = 1;
++		}
++	}
++}
+ 
+-					}
+-					in->dirty = 0;
+ 
+-					if (!parent)
+-						alloc_failed = 1;
++static void yaffs_strip_deleted_objs(yaffs_dev_t *dev)
++{
++	/*
++	*  Sort out state of unlinked and deleted objects after scanning.
++	*/
++	struct ylist_head *i;
++	struct ylist_head *n;
++	yaffs_obj_t *l;
+ 
+-					/* directory stuff...
+-					 * hook up to parent
+-					 */
++	if (dev->read_only)
++		return;
+ 
+-					if (parent && parent->variantType ==
+-					    YAFFS_OBJECT_TYPE_UNKNOWN) {
+-						/* Set up as a directory */
+-						parent->variantType =
+-							YAFFS_OBJECT_TYPE_DIRECTORY;
+-						YINIT_LIST_HEAD(&parent->variant.
+-							directoryVariant.
+-							children);
+-					} else if (!parent || parent->variantType !=
+-						   YAFFS_OBJECT_TYPE_DIRECTORY) {
+-						/* Hoosterman, another problem....
+-						 * We're trying to use a non-directory as a directory
+-						 */
++	/* Soft delete all the unlinked files */
++	ylist_for_each_safe(i, n,
++		&dev->unlinked_dir->variant.dir_variant.children) {
++		if (i) {
++			l = ylist_entry(i, yaffs_obj_t, siblings);
++			yaffs_del_obj(l);
++		}
++	}
+ 
+-						T(YAFFS_TRACE_ERROR,
+-						  (TSTR
+-						   ("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
+-						    TENDSTR)));
+-						parent = dev->lostNFoundDir;
+-					}
++	ylist_for_each_safe(i, n,
++		&dev->del_dir->variant.dir_variant.children) {
++		if (i) {
++			l = ylist_entry(i, yaffs_obj_t, siblings);
++			yaffs_del_obj(l);
++		}
++	}
+ 
+-					yaffs_AddObjectToDirectory(parent, in);
++}
+ 
+-					itsUnlinked = (parent == dev->deletedDir) ||
+-						      (parent == dev->unlinkedDir);
++/*
++ * This code iterates through all the objects making sure that they are rooted.
++ * Any unrooted objects are re-rooted in lost+found.
++ * An object needs to be in one of:
++ * - Directly under deleted, unlinked
++ * - Directly or indirectly under root.
++ *
++ * Note:
++ *  This code assumes that we don't ever change the current relationships between
++ *  directories:
++ *   root_dir->parent == unlinked_dir->parent == del_dir->parent == NULL
++ *   lostNfound->parent == root_dir
++ *
++ * This fixes the problem where directories might have inadvertently been deleted
++ * leaving the object "hanging" without being rooted in the directory tree.
++ */
++ 
++static int yaffs_has_null_parent(yaffs_dev_t *dev, yaffs_obj_t *obj)
++{
++	return (obj == dev->del_dir ||
++		obj == dev->unlinked_dir||
++		obj == dev->root_dir);
++}
+ 
+-					if (isShrink) {
+-						/* Mark the block as having a shrinkHeader */
+-						bi->hasShrinkHeader = 1;
+-					}
++static void yaffs_fix_hanging_objs(yaffs_dev_t *dev)
++{
++	yaffs_obj_t *obj;
++	yaffs_obj_t *parent;
++	int i;
++	struct ylist_head *lh;
++	struct ylist_head *n;
++	int depthLimit;
++	int hanging;
+ 
+-					/* Note re hardlinks.
+-					 * Since we might scan a hardlink before its equivalent object is scanned
+-					 * we put them all in a list.
+-					 * After scanning is complete, we should have all the objects, so we run
+-					 * through this list and fix up all the chains.
+-					 */
++	if (dev->read_only)
++		return;
+ 
+-					switch (in->variantType) {
+-					case YAFFS_OBJECT_TYPE_UNKNOWN:
+-						/* Todo got a problem */
+-						break;
+-					case YAFFS_OBJECT_TYPE_FILE:
+-
+-						if (in->variant.fileVariant.
+-						    scannedFileSize < fileSize) {
+-							/* This covers the case where the file size is greater
+-							 * than where the data is
+-							 * This will happen if the file is resized to be larger
+-							 * than its current data extents.
+-							 */
+-							in->variant.fileVariant.fileSize = fileSize;
+-							in->variant.fileVariant.scannedFileSize =
+-							    in->variant.fileVariant.fileSize;
+-						}
++	/* Iterate through the objects in each hash entry,
++	 * looking at each object.
++	 * Make sure it is rooted.
++	 */
+ 
+-						if (isShrink &&
+-						    in->variant.fileVariant.shrinkSize > fileSize) {
+-							in->variant.fileVariant.shrinkSize = fileSize;
+-						}
++	for (i = 0; i <  YAFFS_NOBJECT_BUCKETS; i++) {
++		ylist_for_each_safe(lh, n, &dev->obj_bucket[i].list) {
++			if (lh) {
++				obj = ylist_entry(lh, yaffs_obj_t, hash_link);
++				parent= obj->parent;
++				
++				if(yaffs_has_null_parent(dev,obj)){
++					/* These directories are not hanging */
++					hanging = 0;
++				}
++				else if(!parent || parent->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
++					hanging = 1;
++				else if(yaffs_has_null_parent(dev,parent))
++					hanging = 0;
++				else {
++					/*
++					 * Need to follow the parent chain to see if it is hanging.
++					 */
++					hanging = 0;
++					depthLimit=100;
+ 
+-						break;
+-					case YAFFS_OBJECT_TYPE_HARDLINK:
+-						if (!itsUnlinked) {
+-							in->variant.hardLinkVariant.equivalentObjectId =
+-								equivalentObjectId;
+-							in->hardLinks.next =
+-								(struct ylist_head *) hardList;
+-							hardList = in;
+-						}
+-						break;
+-					case YAFFS_OBJECT_TYPE_DIRECTORY:
+-						/* Do nothing */
+-						break;
+-					case YAFFS_OBJECT_TYPE_SPECIAL:
+-						/* Do nothing */
+-						break;
+-					case YAFFS_OBJECT_TYPE_SYMLINK:
+-						if (oh) {
+-							in->variant.symLinkVariant.alias =
+-								yaffs_CloneString(oh->alias);
+-							if (!in->variant.symLinkVariant.alias)
+-								alloc_failed = 1;
+-						}
+-						break;
++					while(parent != dev->root_dir &&
++						parent->parent &&
++						parent->parent->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY &&
++						depthLimit > 0){
++						parent = parent->parent;
++						depthLimit--;
+ 					}
+-
++					if(parent != dev->root_dir)
++						hanging = 1;
++				}
++				if(hanging){
++					T(YAFFS_TRACE_SCAN,
++					  (TSTR("Hanging object %d moved to lost and found" TENDSTR),
++					  	obj->obj_id));
++					yaffs_add_obj_to_dir(dev->lost_n_found,obj);
+ 				}
+-
+ 			}
++		}
++	}
++}
+ 
+-		} /* End of scanning for each chunk */
+ 
+-		if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
+-			/* If we got this far while scanning, then the block is fully allocated. */
+-			state = YAFFS_BLOCK_STATE_FULL;
+-		}
++/*
++ * Delete directory contents for cleaning up lost and found.
++ */
++static void yaffs_del_dir_contents(yaffs_obj_t *dir)
++{
++	yaffs_obj_t *obj;
++	struct ylist_head *lh;
++	struct ylist_head *n;
+ 
+-		bi->blockState = state;
++	if(dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
++		YBUG();
++	
++	ylist_for_each_safe(lh, n, &dir->variant.dir_variant.children) {
++		if (lh) {
++			obj = ylist_entry(lh, yaffs_obj_t, siblings);
++			if(obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY)
++				yaffs_del_dir_contents(obj);
++
++			T(YAFFS_TRACE_SCAN,
++				(TSTR("Deleting lost_found object %d" TENDSTR),
++				obj->obj_id));
+ 
+-		/* Now let's see if it was dirty */
+-		if (bi->pagesInUse == 0 &&
+-		    !bi->hasShrinkHeader &&
+-		    bi->blockState == YAFFS_BLOCK_STATE_FULL) {
+-			yaffs_BlockBecameDirty(dev, blk);
++			/* Need to use UnlinkObject since Delete would not handle
++			 * hardlinked objects correctly.
++			 */
++			yaffs_unlink_obj(obj); 
+ 		}
+-
+ 	}
++			
++}
+ 
+-	if (altBlockIndex)
+-		YFREE_ALT(blockIndex);
+-	else
+-		YFREE(blockIndex);
++static void yaffs_empty_l_n_f(yaffs_dev_t *dev)
++{
++	yaffs_del_dir_contents(dev->lost_n_found);
++}
+ 
+-	/* Ok, we've done all the scanning.
+-	 * Fix up the hard link chains.
+-	 * We should now have scanned all the objects, now it's time to add these
+-	 * hardlinks.
+-	 */
+-	yaffs_HardlinkFixup(dev, hardList);
++static void yaffs_check_obj_details_loaded(yaffs_obj_t *in)
++{
++	__u8 *chunkData;
++	yaffs_obj_header *oh;
++	yaffs_dev_t *dev;
++	yaffs_ext_tags tags;
++	int result;
++	int alloc_failed = 0;
+ 
++	if (!in)
++		return;
+ 
+-	yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
++	dev = in->my_dev;
+ 
+-	if (alloc_failed)
+-		return YAFFS_FAIL;
++#if 0
++	T(YAFFS_TRACE_SCAN, (TSTR("details for object %d %s loaded" TENDSTR),
++		in->obj_id,
++		in->lazy_loaded ? "not yet" : "already"));
++#endif
+ 
+-	T(YAFFS_TRACE_SCAN, (TSTR("yaffs_ScanBackwards ends" TENDSTR)));
++	if (in->lazy_loaded && in->hdr_chunk > 0) {
++		in->lazy_loaded = 0;
++		chunkData = yaffs_get_temp_buffer(dev, __LINE__);
+ 
+-	return YAFFS_OK;
+-}
++		result = yaffs_rd_chunk_tags_nand(dev, in->hdr_chunk, chunkData, &tags);
++		oh = (yaffs_obj_header *) chunkData;
+ 
+-/*------------------------------  Directory Functions ----------------------------- */
++		in->yst_mode = oh->yst_mode;
++#ifdef CONFIG_YAFFS_WINCE
++		in->win_atime[0] = oh->win_atime[0];
++		in->win_ctime[0] = oh->win_ctime[0];
++		in->win_mtime[0] = oh->win_mtime[0];
++		in->win_atime[1] = oh->win_atime[1];
++		in->win_ctime[1] = oh->win_ctime[1];
++		in->win_mtime[1] = oh->win_mtime[1];
++#else
++		in->yst_uid = oh->yst_uid;
++		in->yst_gid = oh->yst_gid;
++		in->yst_atime = oh->yst_atime;
++		in->yst_mtime = oh->yst_mtime;
++		in->yst_ctime = oh->yst_ctime;
++		in->yst_rdev = oh->yst_rdev;
+ 
+-static void yaffs_VerifyObjectInDirectory(yaffs_Object *obj)
+-{
+-	struct ylist_head *lh;
+-	yaffs_Object *listObj;
++#endif
++		yaffs_set_obj_name_from_oh(in, oh);
+ 
+-	int count = 0;
++		if (in->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) {
++			in->variant.symlink_variant.alias =
++						    yaffs_clone_str(oh->alias);
++			if (!in->variant.symlink_variant.alias)
++				alloc_failed = 1; /* Not returned to caller */
++		}
+ 
+-	if (!obj) {
+-		T(YAFFS_TRACE_ALWAYS, (TSTR("No object to verify" TENDSTR)));
+-		YBUG();
+-		return;
++		yaffs_release_temp_buffer(dev, chunkData, __LINE__);
+ 	}
++}
+ 
+-	if (yaffs_SkipVerification(obj->myDev))
+-		return;
++/*------------------------------  Directory Functions ----------------------------- */
+ 
+-	if (!obj->parent) {
+-		T(YAFFS_TRACE_ALWAYS, (TSTR("Object does not have parent" TENDSTR)));
+-		YBUG();
++/*
++ *yaffs_update_parent() handles fixing a directories mtime and ctime when a new
++ * link (ie. name) is created or deleted in the directory.
++ *
++ * ie.
++ *   create dir/a : update dir's mtime/ctime
++ *   rm dir/a:   update dir's mtime/ctime
++ *   modify dir/a: don't update dir's mtimme/ctime
++ *
++ * This can be handled immediately or defered. Defering helps reduce the number
++ * of updates when many files in a directory are changed within a brief period.
++ *
++ * If the directory updating is defered then yaffs_update_dirty_dirs must be
++ * called periodically.
++ */
++ 
++static void yaffs_update_parent(yaffs_obj_t *obj)
++{
++	yaffs_dev_t *dev;
++	if(!obj)
+ 		return;
+-	}
+-
+-	if (obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
+-		T(YAFFS_TRACE_ALWAYS, (TSTR("Parent is not directory" TENDSTR)));
+-		YBUG();
+-	}
+-
+-	/* Iterate through the objects in each hash entry */
++#ifndef CONFIG_YAFFS_WINCE
+ 
+-	ylist_for_each(lh, &obj->parent->variant.directoryVariant.children) {
+-		if (lh) {
+-			listObj = ylist_entry(lh, yaffs_Object, siblings);
+-			yaffs_VerifyObject(listObj);
+-			if (obj == listObj)
+-				count++;
++	dev = obj->my_dev;
++	obj->dirty = 1;
++	obj->yst_mtime = obj->yst_ctime = Y_CURRENT_TIME;
++	if(dev->param.defered_dir_update){
++		struct ylist_head *link = &obj->variant.dir_variant.dirty; 
++	
++		if(ylist_empty(link)){
++			ylist_add(link,&dev->dirty_dirs);
++			T(YAFFS_TRACE_BACKGROUND, (TSTR("Added object %d to dirty directories" TENDSTR),obj->obj_id));
+ 		}
+-	 }
+ 
+-	if (count != 1) {
+-		T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory %d times" TENDSTR), count));
+-		YBUG();
+-	}
++	} else
++		yaffs_update_oh(obj, NULL, 0, 0, 0, NULL);
++#endif
+ }
+ 
+-static void yaffs_VerifyDirectory(yaffs_Object *directory)
++void yaffs_update_dirty_dirs(yaffs_dev_t *dev)
+ {
+-	struct ylist_head *lh;
+-	yaffs_Object *listObj;
+-
+-	if (!directory) {
+-		YBUG();
+-		return;
+-	}
++	struct ylist_head *link;
++	yaffs_obj_t *obj;
++	yaffs_dir_s *dS;
++	yaffs_obj_variant *oV;
+ 
+-	if (yaffs_SkipFullVerification(directory->myDev))
+-		return;
++	T(YAFFS_TRACE_BACKGROUND, (TSTR("Update dirty directories" TENDSTR)));
+ 
+-	if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
+-		T(YAFFS_TRACE_ALWAYS, (TSTR("Directory has wrong type: %d" TENDSTR), directory->variantType));
+-		YBUG();
+-	}
++	while(!ylist_empty(&dev->dirty_dirs)){
++		link = dev->dirty_dirs.next;
++		ylist_del_init(link);
++		
++		dS=ylist_entry(link,yaffs_dir_s,dirty);
++		oV = ylist_entry(dS,yaffs_obj_variant,dir_variant);
++		obj = ylist_entry(oV,yaffs_obj_t,variant);
+ 
+-	/* Iterate through the objects in each hash entry */
++		T(YAFFS_TRACE_BACKGROUND, (TSTR("Update directory %d" TENDSTR), obj->obj_id));
+ 
+-	ylist_for_each(lh, &directory->variant.directoryVariant.children) {
+-		if (lh) {
+-			listObj = ylist_entry(lh, yaffs_Object, siblings);
+-			if (listObj->parent != directory) {
+-				T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory list has wrong parent %p" TENDSTR), listObj->parent));
+-				YBUG();
+-			}
+-			yaffs_VerifyObjectInDirectory(listObj);
+-		}
++		if(obj->dirty)
++			yaffs_update_oh(obj, NULL, 0, 0, 0, NULL);
+ 	}
+ }
+ 
+-
+-static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj)
++static void yaffs_remove_obj_from_dir(yaffs_obj_t *obj)
+ {
+-	yaffs_Device *dev = obj->myDev;
+-	yaffs_Object *parent;
++	yaffs_dev_t *dev = obj->my_dev;
++	yaffs_obj_t *parent;
+ 
+-	yaffs_VerifyObjectInDirectory(obj);
++	yaffs_verify_obj_in_dir(obj);
+ 	parent = obj->parent;
+ 
+-	yaffs_VerifyDirectory(parent);
++	yaffs_verify_dir(parent);
+ 
+-	if (dev && dev->removeObjectCallback)
+-		dev->removeObjectCallback(obj);
++	if (dev && dev->param.remove_obj_fn)
++		dev->param.remove_obj_fn(obj);
+ 
+ 
+ 	ylist_del_init(&obj->siblings);
+ 	obj->parent = NULL;
+-
+-	yaffs_VerifyDirectory(parent);
++	
++	yaffs_verify_dir(parent);
+ }
+ 
+-
+-static void yaffs_AddObjectToDirectory(yaffs_Object *directory,
+-					yaffs_Object *obj)
++void yaffs_add_obj_to_dir(yaffs_obj_t *directory,
++					yaffs_obj_t *obj)
+ {
+ 	if (!directory) {
+ 		T(YAFFS_TRACE_ALWAYS,
+@@ -6699,7 +4495,7 @@ static void yaffs_AddObjectToDirectory(y
+ 		YBUG();
+ 		return;
+ 	}
+-	if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
++	if (directory->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
+ 		T(YAFFS_TRACE_ALWAYS,
+ 		  (TSTR
+ 		   ("tragedy: Trying to add an object to a non-directory"
+@@ -6713,27 +4509,27 @@ static void yaffs_AddObjectToDirectory(y
+ 	}
+ 
+ 
+-	yaffs_VerifyDirectory(directory);
++	yaffs_verify_dir(directory);
+ 
+-	yaffs_RemoveObjectFromDirectory(obj);
++	yaffs_remove_obj_from_dir(obj);
+ 
+ 
+ 	/* Now add it */
+-	ylist_add(&obj->siblings, &directory->variant.directoryVariant.children);
++	ylist_add(&obj->siblings, &directory->variant.dir_variant.children);
+ 	obj->parent = directory;
+ 
+-	if (directory == obj->myDev->unlinkedDir
+-			|| directory == obj->myDev->deletedDir) {
++	if (directory == obj->my_dev->unlinked_dir
++			|| directory == obj->my_dev->del_dir) {
+ 		obj->unlinked = 1;
+-		obj->myDev->nUnlinkedFiles++;
+-		obj->renameAllowed = 0;
++		obj->my_dev->n_unlinked_files++;
++		obj->rename_allowed = 0;
+ 	}
+ 
+-	yaffs_VerifyDirectory(directory);
+-	yaffs_VerifyObjectInDirectory(obj);
++	yaffs_verify_dir(directory);
++	yaffs_verify_obj_in_dir(obj);
+ }
+ 
+-yaffs_Object *yaffs_FindObjectByName(yaffs_Object *directory,
++yaffs_obj_t *yaffs_find_by_name(yaffs_obj_t *directory,
+ 				     const YCHAR *name)
+ {
+ 	int sum;
+@@ -6741,7 +4537,7 @@ yaffs_Object *yaffs_FindObjectByName(yaf
+ 	struct ylist_head *i;
+ 	YCHAR buffer[YAFFS_MAX_NAME_LENGTH + 1];
+ 
+-	yaffs_Object *l;
++	yaffs_obj_t *l;
+ 
+ 	if (!name)
+ 		return NULL;
+@@ -6749,39 +4545,39 @@ yaffs_Object *yaffs_FindObjectByName(yaf
+ 	if (!directory) {
+ 		T(YAFFS_TRACE_ALWAYS,
+ 		  (TSTR
+-		   ("tragedy: yaffs_FindObjectByName: null pointer directory"
++		   ("tragedy: yaffs_find_by_name: null pointer directory"
+ 		    TENDSTR)));
+ 		YBUG();
+ 		return NULL;
+ 	}
+-	if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
++	if (directory->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
+ 		T(YAFFS_TRACE_ALWAYS,
+ 		  (TSTR
+-		   ("tragedy: yaffs_FindObjectByName: non-directory" TENDSTR)));
++		   ("tragedy: yaffs_find_by_name: non-directory" TENDSTR)));
+ 		YBUG();
+ 	}
+ 
+-	sum = yaffs_CalcNameSum(name);
++	sum = yaffs_calc_name_sum(name);
+ 
+-	ylist_for_each(i, &directory->variant.directoryVariant.children) {
++	ylist_for_each(i, &directory->variant.dir_variant.children) {
+ 		if (i) {
+-			l = ylist_entry(i, yaffs_Object, siblings);
++			l = ylist_entry(i, yaffs_obj_t, siblings);
+ 
+ 			if (l->parent != directory)
+ 				YBUG();
+ 
+-			yaffs_CheckObjectDetailsLoaded(l);
++			yaffs_check_obj_details_loaded(l);
+ 
+ 			/* Special case for lost-n-found */
+-			if (l->objectId == YAFFS_OBJECTID_LOSTNFOUND) {
++			if (l->obj_id == YAFFS_OBJECTID_LOSTNFOUND) {
+ 				if (yaffs_strcmp(name, YAFFS_LOSTNFOUND_NAME) == 0)
+ 					return l;
+-			} else if (yaffs_SumCompare(l->sum, sum) || l->hdrChunk <= 0) {
++			} else if (yaffs_sum_cmp(l->sum, sum) || l->hdr_chunk <= 0) {
+ 				/* LostnFound chunk called Objxxx
+ 				 * Do a real check
+ 				 */
+-				yaffs_GetObjectName(l, buffer,
+-						    YAFFS_MAX_NAME_LENGTH);
++				yaffs_get_obj_name(l, buffer,
++						    YAFFS_MAX_NAME_LENGTH + 1);
+ 				if (yaffs_strncmp(name, buffer, YAFFS_MAX_NAME_LENGTH) == 0)
+ 					return l;
+ 			}
+@@ -6793,31 +4589,31 @@ yaffs_Object *yaffs_FindObjectByName(yaf
+ 
+ 
+ #if 0
+-int yaffs_ApplyToDirectoryChildren(yaffs_Object *theDir,
+-					int (*fn) (yaffs_Object *))
++int yaffs_ApplyToDirectoryChildren(yaffs_obj_t *the_dir,
++					int (*fn) (yaffs_obj_t *))
+ {
+ 	struct ylist_head *i;
+-	yaffs_Object *l;
++	yaffs_obj_t *l;
+ 
+-	if (!theDir) {
++	if (!the_dir) {
+ 		T(YAFFS_TRACE_ALWAYS,
+ 		  (TSTR
+-		   ("tragedy: yaffs_FindObjectByName: null pointer directory"
++		   ("tragedy: yaffs_find_by_name: null pointer directory"
+ 		    TENDSTR)));
+ 		YBUG();
+ 		return YAFFS_FAIL;
+ 	}
+-	if (theDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
++	if (the_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
+ 		T(YAFFS_TRACE_ALWAYS,
+ 		  (TSTR
+-		   ("tragedy: yaffs_FindObjectByName: non-directory" TENDSTR)));
++		   ("tragedy: yaffs_find_by_name: non-directory" TENDSTR)));
+ 		YBUG();
+ 		return YAFFS_FAIL;
+ 	}
+ 
+-	ylist_for_each(i, &theDir->variant.directoryVariant.children) {
++	ylist_for_each(i, &the_dir->variant.dir_variant.children) {
+ 		if (i) {
+-			l = ylist_entry(i, yaffs_Object, siblings);
++			l = ylist_entry(i, yaffs_obj_t, siblings);
+ 			if (l && !fn(l))
+ 				return YAFFS_FAIL;
+ 		}
+@@ -6832,82 +4628,175 @@ int yaffs_ApplyToDirectoryChildren(yaffs
+  * actual object.
+  */
+ 
+-yaffs_Object *yaffs_GetEquivalentObject(yaffs_Object *obj)
++yaffs_obj_t *yaffs_get_equivalent_obj(yaffs_obj_t *obj)
+ {
+-	if (obj && obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
++	if (obj && obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK) {
+ 		/* We want the object id of the equivalent object, not this one */
+-		obj = obj->variant.hardLinkVariant.equivalentObject;
+-		yaffs_CheckObjectDetailsLoaded(obj);
++		obj = obj->variant.hardlink_variant.equiv_obj;
++		yaffs_check_obj_details_loaded(obj);
+ 	}
+ 	return obj;
+ }
+ 
+-int yaffs_GetObjectName(yaffs_Object *obj, YCHAR *name, int buffSize)
+-{
+-	memset(name, 0, buffSize * sizeof(YCHAR));
+-
+-	yaffs_CheckObjectDetailsLoaded(obj);
++/*
++ *  A note or two on object names.
++ *  * If the object name is missing, we then make one up in the form objnnn
++ *
++ *  * ASCII names are stored in the object header's name field from byte zero
++ *  * Unicode names are historically stored starting from byte zero.
++ *
++ * Then there are automatic Unicode names...
++ * The purpose of these is to save names in a way that can be read as
++ * ASCII or Unicode names as appropriate, thus allowing a Unicode and ASCII
++ * system to share files.
++ *
++ * These automatic unicode are stored slightly differently...
++ *  - If the name can fit in the ASCII character space then they are saved as 
++ *    ascii names as per above.
++ *  - If the name needs Unicode then the name is saved in Unicode
++ *    starting at oh->name[1].
+ 
+-	if (obj->objectId == YAFFS_OBJECTID_LOSTNFOUND) {
+-		yaffs_strncpy(name, YAFFS_LOSTNFOUND_NAME, buffSize - 1);
+-	} else if (obj->hdrChunk <= 0) {
++ */
++static void yaffs_fix_null_name(yaffs_obj_t * obj,YCHAR * name, int buffer_size)
++{
++	/* Create an object name if we could not find one. */
++	if(yaffs_strnlen(name,YAFFS_MAX_NAME_LENGTH) == 0){
+ 		YCHAR locName[20];
+ 		YCHAR numString[20];
+ 		YCHAR *x = &numString[19];
+-		unsigned v = obj->objectId;
++		unsigned v = obj->obj_id;
+ 		numString[19] = 0;
+-		while (v > 0) {
++		while(v>0){
+ 			x--;
+ 			*x = '0' + (v % 10);
+ 			v /= 10;
+ 		}
+ 		/* make up a name */
+ 		yaffs_strcpy(locName, YAFFS_LOSTNFOUND_PREFIX);
+-		yaffs_strcat(locName, x);
+-		yaffs_strncpy(name, locName, buffSize - 1);
++		yaffs_strcat(locName,x);
++		yaffs_strncpy(name, locName, buffer_size - 1);
++	}
++}
++
++static void yaffs_load_name_from_oh(yaffs_dev_t *dev,YCHAR *name, const YCHAR *ohName, int bufferSize)
++{
++#ifdef CONFIG_YAFFS_AUTO_UNICODE
++	if(dev->param.auto_unicode){
++		if(*ohName){
++			/* It is an ASCII name, so do an ASCII to unicode conversion */
++			const char *asciiOhName = (const char *)ohName;
++			int n = bufferSize - 1;
++			while(n > 0 && *asciiOhName){
++				*name = *asciiOhName;
++				name++;
++				asciiOhName++;
++				n--;
++			}
++		} else 
++			yaffs_strncpy(name,ohName+1, bufferSize -1);
++	} else
++#endif
++		yaffs_strncpy(name, ohName, bufferSize - 1);
++}
++
++
++static void yaffs_load_oh_from_name(yaffs_dev_t *dev, YCHAR *ohName, const YCHAR *name)
++{
++#ifdef CONFIG_YAFFS_AUTO_UNICODE
++
++	int isAscii;
++	YCHAR *w;
++
++	if(dev->param.auto_unicode){
++
++		isAscii = 1;
++		w = name;
++	
++		/* Figure out if the name will fit in ascii character set */
++		while(isAscii && *w){
++			if((*w) & 0xff00)
++				isAscii = 0;
++			w++;
++		}
+ 
++		if(isAscii){
++			/* It is an ASCII name, so do a unicode to ascii conversion */
++			char *asciiOhName = (char *)ohName;
++			int n = YAFFS_MAX_NAME_LENGTH  - 1;
++			while(n > 0 && *name){
++				*asciiOhName= *name;
++				name++;
++				asciiOhName++;
++				n--;
++			}
++		} else{
++			/* It is a unicode name, so save starting at the second YCHAR */
++			*ohName = 0;
++			yaffs_strncpy(ohName+1,name, YAFFS_MAX_NAME_LENGTH -2);
++		}
+ 	}
++	else 
++#endif
++		yaffs_strncpy(ohName,name, YAFFS_MAX_NAME_LENGTH - 1);
++
++}
++
++int yaffs_get_obj_name(yaffs_obj_t * obj, YCHAR * name, int buffer_size)
++{
++	memset(name, 0, buffer_size * sizeof(YCHAR));
++	
++	yaffs_check_obj_details_loaded(obj);
++
++	if (obj->obj_id == YAFFS_OBJECTID_LOSTNFOUND) {
++		yaffs_strncpy(name, YAFFS_LOSTNFOUND_NAME, buffer_size - 1);
++	} 
+ #ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
+-	else if (obj->shortName[0])
+-		yaffs_strcpy(name, obj->shortName);
++	else if (obj->short_name[0]) {
++		yaffs_strcpy(name, obj->short_name);
++	}
+ #endif
+-	else {
++	else if(obj->hdr_chunk > 0) {
+ 		int result;
+-		__u8 *buffer = yaffs_GetTempBuffer(obj->myDev, __LINE__);
++		__u8 *buffer = yaffs_get_temp_buffer(obj->my_dev, __LINE__);
+ 
+-		yaffs_ObjectHeader *oh = (yaffs_ObjectHeader *) buffer;
++		yaffs_obj_header *oh = (yaffs_obj_header *) buffer;
+ 
+-		memset(buffer, 0, obj->myDev->nDataBytesPerChunk);
++		memset(buffer, 0, obj->my_dev->data_bytes_per_chunk);
+ 
+-		if (obj->hdrChunk > 0) {
+-			result = yaffs_ReadChunkWithTagsFromNAND(obj->myDev,
+-							obj->hdrChunk, buffer,
++		if (obj->hdr_chunk > 0) {
++			result = yaffs_rd_chunk_tags_nand(obj->my_dev,
++							obj->hdr_chunk, buffer,
+ 							NULL);
+ 		}
+-		yaffs_strncpy(name, oh->name, buffSize - 1);
++		yaffs_load_name_from_oh(obj->my_dev,name,oh->name,buffer_size);
+ 
+-		yaffs_ReleaseTempBuffer(obj->myDev, buffer, __LINE__);
++		yaffs_release_temp_buffer(obj->my_dev, buffer, __LINE__);
+ 	}
+ 
+-	return yaffs_strlen(name);
++	yaffs_fix_null_name(obj,name,buffer_size);
++
++	return yaffs_strnlen(name,YAFFS_MAX_NAME_LENGTH);
+ }
+ 
+-int yaffs_GetObjectFileLength(yaffs_Object *obj)
++
++int yaffs_get_obj_length(yaffs_obj_t *obj)
+ {
+ 	/* Dereference any hard linking */
+-	obj = yaffs_GetEquivalentObject(obj);
++	obj = yaffs_get_equivalent_obj(obj);
+ 
+-	if (obj->variantType == YAFFS_OBJECT_TYPE_FILE)
+-		return obj->variant.fileVariant.fileSize;
+-	if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK)
+-		return yaffs_strlen(obj->variant.symLinkVariant.alias);
+-	else {
++	if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE)
++		return obj->variant.file_variant.file_size;
++	if (obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK){
++		if(!obj->variant.symlink_variant.alias)
++			return 0;
++		return yaffs_strnlen(obj->variant.symlink_variant.alias,YAFFS_MAX_ALIAS_LENGTH);
++	} else {
+ 		/* Only a directory should drop through to here */
+-		return obj->myDev->nDataBytesPerChunk;
++		return obj->my_dev->data_bytes_per_chunk;
+ 	}
+ }
+ 
+-int yaffs_GetObjectLinkCount(yaffs_Object *obj)
++int yaffs_get_obj_link_count(yaffs_obj_t *obj)
+ {
+ 	int count = 0;
+ 	struct ylist_head *i;
+@@ -6915,24 +4804,24 @@ int yaffs_GetObjectLinkCount(yaffs_Objec
+ 	if (!obj->unlinked)
+ 		count++;		/* the object itself */
+ 
+-	ylist_for_each(i, &obj->hardLinks)
++	ylist_for_each(i, &obj->hard_links)
+ 		count++;		/* add the hard links; */
+ 
+ 	return count;
+ }
+ 
+-int yaffs_GetObjectInode(yaffs_Object *obj)
++int yaffs_get_obj_inode(yaffs_obj_t *obj)
+ {
+-	obj = yaffs_GetEquivalentObject(obj);
++	obj = yaffs_get_equivalent_obj(obj);
+ 
+-	return obj->objectId;
++	return obj->obj_id;
+ }
+ 
+-unsigned yaffs_GetObjectType(yaffs_Object *obj)
++unsigned yaffs_get_obj_type(yaffs_obj_t *obj)
+ {
+-	obj = yaffs_GetEquivalentObject(obj);
++	obj = yaffs_get_equivalent_obj(obj);
+ 
+-	switch (obj->variantType) {
++	switch (obj->variant_type) {
+ 	case YAFFS_OBJECT_TYPE_FILE:
+ 		return DT_REG;
+ 		break;
+@@ -6960,18 +4849,18 @@ unsigned yaffs_GetObjectType(yaffs_Objec
+ 	}
+ }
+ 
+-YCHAR *yaffs_GetSymlinkAlias(yaffs_Object *obj)
++YCHAR *yaffs_get_symlink_alias(yaffs_obj_t *obj)
+ {
+-	obj = yaffs_GetEquivalentObject(obj);
+-	if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK)
+-		return yaffs_CloneString(obj->variant.symLinkVariant.alias);
++	obj = yaffs_get_equivalent_obj(obj);
++	if (obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK)
++		return yaffs_clone_str(obj->variant.symlink_variant.alias);
+ 	else
+-		return yaffs_CloneString(_Y(""));
++		return yaffs_clone_str(_Y(""));
+ }
+ 
+ #ifndef CONFIG_YAFFS_WINCE
+ 
+-int yaffs_SetAttributes(yaffs_Object *obj, struct iattr *attr)
++int yaffs_set_attribs(yaffs_obj_t *obj, struct iattr *attr)
+ {
+ 	unsigned int valid = attr->ia_valid;
+ 
+@@ -6990,14 +4879,14 @@ int yaffs_SetAttributes(yaffs_Object *ob
+ 		obj->yst_mtime = Y_TIME_CONVERT(attr->ia_mtime);
+ 
+ 	if (valid & ATTR_SIZE)
+-		yaffs_ResizeFile(obj, attr->ia_size);
++		yaffs_resize_file(obj, attr->ia_size);
+ 
+-	yaffs_UpdateObjectHeader(obj, NULL, 1, 0, 0);
++	yaffs_update_oh(obj, NULL, 1, 0, 0, NULL);
+ 
+ 	return YAFFS_OK;
+ 
+ }
+-int yaffs_GetAttributes(yaffs_Object *obj, struct iattr *attr)
++int yaffs_get_attribs(yaffs_obj_t *obj, struct iattr *attr)
+ {
+ 	unsigned int valid = 0;
+ 
+@@ -7015,7 +4904,7 @@ int yaffs_GetAttributes(yaffs_Object *ob
+ 	Y_TIME_CONVERT(attr->ia_mtime) = obj->yst_mtime;
+ 	valid |= ATTR_MTIME;
+ 
+-	attr->ia_size = yaffs_GetFileSize(obj);
++	attr->ia_size = yaffs_get_file_size(obj);
+ 	valid |= ATTR_SIZE;
+ 
+ 	attr->ia_valid = valid;
+@@ -7025,20 +4914,137 @@ int yaffs_GetAttributes(yaffs_Object *ob
+ 
+ #endif
+ 
++
++static int yaffs_do_xattrib_mod(yaffs_obj_t *obj, int set, const YCHAR *name, const void *value, int size, int flags)
++{
++	yaffs_xattr_mod xmod;
++
++	int result;
++
++	xmod.set = set;
++	xmod.name = name;
++	xmod.data = value;
++	xmod.size =  size;
++	xmod.flags = flags;
++	xmod.result = -ENOSPC;
++
++	result = yaffs_update_oh(obj, NULL, 0, 0, 0, &xmod);
++
++	if(result > 0)
++		return xmod.result;
++	else
++		return -ENOSPC;
++}
++
++static int yaffs_apply_xattrib_mod(yaffs_obj_t *obj, char *buffer, yaffs_xattr_mod *xmod)
++{
++	int retval = 0;
++	int x_offs = sizeof(yaffs_obj_header);
++	yaffs_dev_t *dev = obj->my_dev;
++	int x_size = dev->data_bytes_per_chunk - sizeof(yaffs_obj_header);
++
++	char * x_buffer = buffer + x_offs;
++
++	if(xmod->set)
++		retval = nval_set(x_buffer, x_size, xmod->name, xmod->data, xmod->size, xmod->flags);
++	else
++		retval = nval_del(x_buffer, x_size, xmod->name);
++
++	obj->has_xattr = nval_hasvalues(x_buffer, x_size);
++	obj->xattr_known = 1;
++
++	xmod->result = retval;
++
++	return retval;
++}
++
++static int yaffs_do_xattrib_fetch(yaffs_obj_t *obj, const YCHAR *name, void *value, int size)
++{
++	char *buffer = NULL;
++	int result;
++	yaffs_ext_tags tags;
++	yaffs_dev_t *dev = obj->my_dev;
++	int x_offs = sizeof(yaffs_obj_header);
++	int x_size = dev->data_bytes_per_chunk - sizeof(yaffs_obj_header);
++
++	char * x_buffer;
++
++	int retval = 0;
++
++	if(obj->hdr_chunk < 1)
++		return -ENODATA;
++
++	/* If we know that the object has no xattribs then don't do all the
++	 * reading and parsing.
++	 */
++	if(obj->xattr_known && !obj->has_xattr){
++		if(name)
++			return -ENODATA;
++		else
++			return 0;
++	}
++
++	buffer = (char *) yaffs_get_temp_buffer(dev, __LINE__);
++	if(!buffer)
++		return -ENOMEM;
++
++	result = yaffs_rd_chunk_tags_nand(dev,obj->hdr_chunk, (__u8 *)buffer, &tags);
++
++	if(result != YAFFS_OK)
++		retval = -ENOENT;
++	else{
++		x_buffer =  buffer + x_offs;
++
++		if (!obj->xattr_known){
++			obj->has_xattr = nval_hasvalues(x_buffer, x_size);
++			obj->xattr_known = 1;
++		}
++
++		if(name)
++			retval = nval_get(x_buffer, x_size, name, value, size);
++		else
++			retval = nval_list(x_buffer, x_size, value,size);
++	}
++	yaffs_release_temp_buffer(dev,(__u8 *)buffer,__LINE__);
++	return retval;
++}
++
++int yaffs_set_xattrib(yaffs_obj_t *obj, const YCHAR *name, const void * value, int size, int flags)
++{
++	return yaffs_do_xattrib_mod(obj, 1, name, value, size, flags);
++}
++
++int yaffs_remove_xattrib(yaffs_obj_t *obj, const YCHAR *name)
++{
++	return yaffs_do_xattrib_mod(obj, 0, name, NULL, 0, 0);
++}
++
++int yaffs_get_xattrib(yaffs_obj_t *obj, const YCHAR *name, void *value, int size)
++{
++	return yaffs_do_xattrib_fetch(obj, name, value, size);
++}
++
++int yaffs_list_xattrib(yaffs_obj_t *obj, char *buffer, int size)
++{
++	return yaffs_do_xattrib_fetch(obj, NULL, buffer,size);
++}
++
++
++
+ #if 0
+-int yaffs_DumpObject(yaffs_Object *obj)
++int yaffs_dump_obj(yaffs_obj_t *obj)
+ {
+ 	YCHAR name[257];
+ 
+-	yaffs_GetObjectName(obj, name, 256);
++	yaffs_get_obj_name(obj, name, YAFFS_MAX_NAME_LENGTH + 1);
+ 
+ 	T(YAFFS_TRACE_ALWAYS,
+ 	  (TSTR
+ 	   ("Object %d, inode %d \"%s\"\n dirty %d valid %d serial %d sum %d"
+ 	    " chunk %d type %d size %d\n"
+-	    TENDSTR), obj->objectId, yaffs_GetObjectInode(obj), name,
+-	   obj->dirty, obj->valid, obj->serial, obj->sum, obj->hdrChunk,
+-	   yaffs_GetObjectType(obj), yaffs_GetObjectFileLength(obj)));
++	    TENDSTR), obj->obj_id, yaffs_get_obj_inode(obj), name,
++	   obj->dirty, obj->valid, obj->serial, obj->sum, obj->hdr_chunk,
++	   yaffs_get_obj_type(obj), yaffs_get_obj_length(obj)));
+ 
+ 	return YAFFS_OK;
+ }
+@@ -7046,72 +5052,74 @@ int yaffs_DumpObject(yaffs_Object *obj)
+ 
+ /*---------------------------- Initialisation code -------------------------------------- */
+ 
+-static int yaffs_CheckDevFunctions(const yaffs_Device *dev)
++static int yaffs_cehck_dev_fns(const yaffs_dev_t *dev)
+ {
+ 
+ 	/* Common functions, gotta have */
+-	if (!dev->eraseBlockInNAND || !dev->initialiseNAND)
++	if (!dev->param.erase_fn || !dev->param.initialise_flash_fn)
+ 		return 0;
+ 
+ #ifdef CONFIG_YAFFS_YAFFS2
+ 
+ 	/* Can use the "with tags" style interface for yaffs1 or yaffs2 */
+-	if (dev->writeChunkWithTagsToNAND &&
+-	    dev->readChunkWithTagsFromNAND &&
+-	    !dev->writeChunkToNAND &&
+-	    !dev->readChunkFromNAND &&
+-	    dev->markNANDBlockBad && dev->queryNANDBlock)
++	if (dev->param.write_chunk_tags_fn &&
++	    dev->param.read_chunk_tags_fn &&
++	    !dev->param.write_chunk_fn &&
++	    !dev->param.read_chunk_fn &&
++	    dev->param.bad_block_fn &&
++	    dev->param.query_block_fn)
+ 		return 1;
+ #endif
+ 
+ 	/* Can use the "spare" style interface for yaffs1 */
+-	if (!dev->isYaffs2 &&
+-	    !dev->writeChunkWithTagsToNAND &&
+-	    !dev->readChunkWithTagsFromNAND &&
+-	    dev->writeChunkToNAND &&
+-	    dev->readChunkFromNAND &&
+-	    !dev->markNANDBlockBad && !dev->queryNANDBlock)
++	if (!dev->param.is_yaffs2 &&
++	    !dev->param.write_chunk_tags_fn &&
++	    !dev->param.read_chunk_tags_fn &&
++	    dev->param.write_chunk_fn &&
++	    dev->param.read_chunk_fn &&
++	    !dev->param.bad_block_fn &&
++	    !dev->param.query_block_fn)
+ 		return 1;
+ 
+-	return 0;		/* bad */
++	return 0;	/* bad */
+ }
+ 
+ 
+-static int yaffs_CreateInitialDirectories(yaffs_Device *dev)
++static int yaffs_create_initial_dir(yaffs_dev_t *dev)
+ {
+ 	/* Initialise the unlinked, deleted, root and lost and found directories */
+ 
+-	dev->lostNFoundDir = dev->rootDir =  NULL;
+-	dev->unlinkedDir = dev->deletedDir = NULL;
++	dev->lost_n_found = dev->root_dir =  NULL;
++	dev->unlinked_dir = dev->del_dir = NULL;
+ 
+-	dev->unlinkedDir =
+-	    yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_UNLINKED, S_IFDIR);
++	dev->unlinked_dir =
++	    yaffs_create_fake_dir(dev, YAFFS_OBJECTID_UNLINKED, S_IFDIR);
+ 
+-	dev->deletedDir =
+-	    yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_DELETED, S_IFDIR);
++	dev->del_dir =
++	    yaffs_create_fake_dir(dev, YAFFS_OBJECTID_DELETED, S_IFDIR);
+ 
+-	dev->rootDir =
+-	    yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_ROOT,
++	dev->root_dir =
++	    yaffs_create_fake_dir(dev, YAFFS_OBJECTID_ROOT,
+ 				      YAFFS_ROOT_MODE | S_IFDIR);
+-	dev->lostNFoundDir =
+-	    yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_LOSTNFOUND,
++	dev->lost_n_found =
++	    yaffs_create_fake_dir(dev, YAFFS_OBJECTID_LOSTNFOUND,
+ 				      YAFFS_LOSTNFOUND_MODE | S_IFDIR);
+ 
+-	if (dev->lostNFoundDir && dev->rootDir && dev->unlinkedDir && dev->deletedDir) {
+-		yaffs_AddObjectToDirectory(dev->rootDir, dev->lostNFoundDir);
++	if (dev->lost_n_found && dev->root_dir && dev->unlinked_dir && dev->del_dir) {
++		yaffs_add_obj_to_dir(dev->root_dir, dev->lost_n_found);
+ 		return YAFFS_OK;
+ 	}
+ 
+ 	return YAFFS_FAIL;
+ }
+ 
+-int yaffs_GutsInitialise(yaffs_Device *dev)
++int yaffs_guts_initialise(yaffs_dev_t *dev)
+ {
+ 	int init_failed = 0;
+ 	unsigned x;
+ 	int bits;
+ 
+-	T(YAFFS_TRACE_TRACING, (TSTR("yaffs: yaffs_GutsInitialise()" TENDSTR)));
++	T(YAFFS_TRACE_TRACING, (TSTR("yaffs: yaffs_guts_initialise()" TENDSTR)));
+ 
+ 	/* Check stuff that must be set */
+ 
+@@ -7120,52 +5128,52 @@ int yaffs_GutsInitialise(yaffs_Device *d
+ 		return YAFFS_FAIL;
+ 	}
+ 
+-	dev->internalStartBlock = dev->startBlock;
+-	dev->internalEndBlock = dev->endBlock;
+-	dev->blockOffset = 0;
+-	dev->chunkOffset = 0;
+-	dev->nFreeChunks = 0;
+-
+-	dev->gcBlock = -1;
+-
+-	if (dev->startBlock == 0) {
+-		dev->internalStartBlock = dev->startBlock + 1;
+-		dev->internalEndBlock = dev->endBlock + 1;
+-		dev->blockOffset = 1;
+-		dev->chunkOffset = dev->nChunksPerBlock;
++	dev->internal_start_block = dev->param.start_block;
++	dev->internal_end_block = dev->param.end_block;
++	dev->block_offset = 0;
++	dev->chunk_offset = 0;
++	dev->n_free_chunks = 0;
++
++	dev->gc_block = 0;
++
++	if (dev->param.start_block == 0) {
++		dev->internal_start_block = dev->param.start_block + 1;
++		dev->internal_end_block = dev->param.end_block + 1;
++		dev->block_offset = 1;
++		dev->chunk_offset = dev->param.chunks_per_block;
+ 	}
+ 
+ 	/* Check geometry parameters. */
+ 
+-	if ((!dev->inbandTags && dev->isYaffs2 && dev->totalBytesPerChunk < 1024) ||
+-	    (!dev->isYaffs2 && dev->totalBytesPerChunk < 512) ||
+-	    (dev->inbandTags && !dev->isYaffs2) ||
+-	     dev->nChunksPerBlock < 2 ||
+-	     dev->nReservedBlocks < 2 ||
+-	     dev->internalStartBlock <= 0 ||
+-	     dev->internalEndBlock <= 0 ||
+-	     dev->internalEndBlock <= (dev->internalStartBlock + dev->nReservedBlocks + 2)) {	/* otherwise it is too small */
++	if ((!dev->param.inband_tags && dev->param.is_yaffs2 && dev->param.total_bytes_per_chunk < 1024) ||
++	    (!dev->param.is_yaffs2 && dev->param.total_bytes_per_chunk < 512) ||
++	    (dev->param.inband_tags && !dev->param.is_yaffs2) ||
++	     dev->param.chunks_per_block < 2 ||
++	     dev->param.n_reserved_blocks < 2 ||
++	     dev->internal_start_block <= 0 ||
++	     dev->internal_end_block <= 0 ||
++	     dev->internal_end_block <= (dev->internal_start_block + dev->param.n_reserved_blocks + 2)) {	/* otherwise it is too small */
+ 		T(YAFFS_TRACE_ALWAYS,
+ 		  (TSTR
+-		   ("yaffs: NAND geometry problems: chunk size %d, type is yaffs%s, inbandTags %d "
+-		    TENDSTR), dev->totalBytesPerChunk, dev->isYaffs2 ? "2" : "", dev->inbandTags));
++		   ("yaffs: NAND geometry problems: chunk size %d, type is yaffs%s, inband_tags %d "
++		    TENDSTR), dev->param.total_bytes_per_chunk, dev->param.is_yaffs2 ? "2" : "", dev->param.inband_tags));
+ 		return YAFFS_FAIL;
+ 	}
+ 
+-	if (yaffs_InitialiseNAND(dev) != YAFFS_OK) {
++	if (yaffs_init_nand(dev) != YAFFS_OK) {
+ 		T(YAFFS_TRACE_ALWAYS,
+ 		  (TSTR("yaffs: InitialiseNAND failed" TENDSTR)));
+ 		return YAFFS_FAIL;
+ 	}
+ 
+ 	/* Sort out space for inband tags, if required */
+-	if (dev->inbandTags)
+-		dev->nDataBytesPerChunk = dev->totalBytesPerChunk - sizeof(yaffs_PackedTags2TagsPart);
++	if (dev->param.inband_tags)
++		dev->data_bytes_per_chunk = dev->param.total_bytes_per_chunk - sizeof(yaffs_PackedTags2TagsPart);
+ 	else
+-		dev->nDataBytesPerChunk = dev->totalBytesPerChunk;
++		dev->data_bytes_per_chunk = dev->param.total_bytes_per_chunk;
+ 
+ 	/* Got the right mix of functions? */
+-	if (!yaffs_CheckDevFunctions(dev)) {
++	if (!yaffs_cehck_dev_fns(dev)) {
+ 		/* Function missing */
+ 		T(YAFFS_TRACE_ALWAYS,
+ 		  (TSTR
+@@ -7175,13 +5183,13 @@ int yaffs_GutsInitialise(yaffs_Device *d
+ 	}
+ 
+ 	/* This is really a compilation check. */
+-	if (!yaffs_CheckStructures()) {
++	if (!yaffs_check_structures()) {
+ 		T(YAFFS_TRACE_ALWAYS,
+-		  (TSTR("yaffs_CheckStructures failed\n" TENDSTR)));
++		  (TSTR("yaffs_check_structures failed\n" TENDSTR)));
+ 		return YAFFS_FAIL;
+ 	}
+ 
+-	if (dev->isMounted) {
++	if (dev->is_mounted) {
+ 		T(YAFFS_TRACE_ALWAYS,
+ 		  (TSTR("yaffs: device already mounted\n" TENDSTR)));
+ 		return YAFFS_FAIL;
+@@ -7189,59 +5197,62 @@ int yaffs_GutsInitialise(yaffs_Device *d
+ 
+ 	/* Finished with most checks. One or two more checks happen later on too. */
+ 
+-	dev->isMounted = 1;
++	dev->is_mounted = 1;
+ 
+ 	/* OK now calculate a few things for the device */
+ 
+ 	/*
+ 	 *  Calculate all the chunk size manipulation numbers:
+ 	 */
+-	x = dev->nDataBytesPerChunk;
+-	/* We always use dev->chunkShift and dev->chunkDiv */
+-	dev->chunkShift = Shifts(x);
+-	x >>= dev->chunkShift;
+-	dev->chunkDiv = x;
+-	/* We only use chunk mask if chunkDiv is 1 */
+-	dev->chunkMask = (1<<dev->chunkShift) - 1;
++	x = dev->data_bytes_per_chunk;
++	/* We always use dev->chunk_shift and dev->chunk_div */
++	dev->chunk_shift = Shifts(x);
++	x >>= dev->chunk_shift;
++	dev->chunk_div = x;
++	/* We only use chunk mask if chunk_div is 1 */
++	dev->chunk_mask = (1<<dev->chunk_shift) - 1;
+ 
+ 	/*
+-	 * Calculate chunkGroupBits.
+-	 * We need to find the next power of 2 > than internalEndBlock
++	 * Calculate chunk_grp_bits.
++	 * We need to find the next power of 2 > than internal_end_block
+ 	 */
+ 
+-	x = dev->nChunksPerBlock * (dev->internalEndBlock + 1);
++	x = dev->param.chunks_per_block * (dev->internal_end_block + 1);
+ 
+ 	bits = ShiftsGE(x);
+ 
+ 	/* Set up tnode width if wide tnodes are enabled. */
+-	if (!dev->wideTnodesDisabled) {
++	if (!dev->param.wide_tnodes_disabled) {
+ 		/* bits must be even so that we end up with 32-bit words */
+ 		if (bits & 1)
+ 			bits++;
+ 		if (bits < 16)
+-			dev->tnodeWidth = 16;
++			dev->tnode_width = 16;
+ 		else
+-			dev->tnodeWidth = bits;
++			dev->tnode_width = bits;
+ 	} else
+-		dev->tnodeWidth = 16;
++		dev->tnode_width = 16;
+ 
+-	dev->tnodeMask = (1<<dev->tnodeWidth)-1;
++	dev->tnode_mask = (1<<dev->tnode_width)-1;
+ 
+ 	/* Level0 Tnodes are 16 bits or wider (if wide tnodes are enabled),
+ 	 * so if the bitwidth of the
+ 	 * chunk range we're using is greater than 16 we need
+-	 * to figure out chunk shift and chunkGroupSize
++	 * to figure out chunk shift and chunk_grp_size
+ 	 */
+ 
+-	if (bits <= dev->tnodeWidth)
+-		dev->chunkGroupBits = 0;
++	if (bits <= dev->tnode_width)
++		dev->chunk_grp_bits = 0;
+ 	else
+-		dev->chunkGroupBits = bits - dev->tnodeWidth;
++		dev->chunk_grp_bits = bits - dev->tnode_width;
+ 
++	dev->tnode_size = (dev->tnode_width * YAFFS_NTNODES_LEVEL0)/8;
++	if(dev->tnode_size < sizeof(yaffs_tnode_t))
++		dev->tnode_size = sizeof(yaffs_tnode_t);
+ 
+-	dev->chunkGroupSize = 1 << dev->chunkGroupBits;
++	dev->chunk_grp_size = 1 << dev->chunk_grp_bits;
+ 
+-	if (dev->nChunksPerBlock < dev->chunkGroupSize) {
++	if (dev->param.chunks_per_block < dev->chunk_grp_size) {
+ 		/* We have a problem because the soft delete won't work if
+ 		 * the chunk group size > chunks per block.
+ 		 * This can be remedied by using larger "virtual blocks".
+@@ -7255,85 +5266,89 @@ int yaffs_GutsInitialise(yaffs_Device *d
+ 	/* OK, we've finished verifying the device, lets continue with initialisation */
+ 
+ 	/* More device initialisation */
+-	dev->garbageCollections = 0;
+-	dev->passiveGarbageCollections = 0;
+-	dev->currentDirtyChecker = 0;
+-	dev->bufferedBlock = -1;
+-	dev->doingBufferedBlockRewrite = 0;
+-	dev->nDeletedFiles = 0;
+-	dev->nBackgroundDeletions = 0;
+-	dev->nUnlinkedFiles = 0;
+-	dev->eccFixed = 0;
+-	dev->eccUnfixed = 0;
+-	dev->tagsEccFixed = 0;
+-	dev->tagsEccUnfixed = 0;
+-	dev->nErasureFailures = 0;
+-	dev->nErasedBlocks = 0;
+-	dev->isDoingGC = 0;
+-	dev->hasPendingPrioritisedGCs = 1; /* Assume the worst for now, will get fixed on first GC */
++	dev->all_gcs = 0;
++	dev->passive_gc_count = 0;
++	dev->oldest_dirty_gc_count = 0;
++	dev->bg_gcs = 0;
++	dev->gc_block_finder = 0;
++	dev->buffered_block = -1;
++	dev->doing_buffered_block_rewrite = 0;
++	dev->n_deleted_files = 0;
++	dev->n_bg_deletions = 0;
++	dev->n_unlinked_files = 0;
++	dev->n_ecc_fixed = 0;
++	dev->n_ecc_unfixed = 0;
++	dev->n_tags_ecc_fixed = 0;
++	dev->n_tags_ecc_unfixed = 0;
++	dev->n_erase_failures = 0;
++	dev->n_erased_blocks = 0;
++	dev->gc_disable= 0;
++	dev->has_pending_prioritised_gc = 1; /* Assume the worst for now, will get fixed on first GC */
++	YINIT_LIST_HEAD(&dev->dirty_dirs);
++	dev->oldest_dirty_seq = 0;
++	dev->oldest_dirty_block = 0;
+ 
+ 	/* Initialise temporary buffers and caches. */
+-	if (!yaffs_InitialiseTempBuffers(dev))
++	if (!yaffs_init_tmp_buffers(dev))
+ 		init_failed = 1;
+ 
+-	dev->srCache = NULL;
+-	dev->gcCleanupList = NULL;
++	dev->cache = NULL;
++	dev->gc_cleanup_list = NULL;
+ 
+ 
+ 	if (!init_failed &&
+-	    dev->nShortOpCaches > 0) {
++	    dev->param.n_caches > 0) {
+ 		int i;
+ 		void *buf;
+-		int srCacheBytes = dev->nShortOpCaches * sizeof(yaffs_ChunkCache);
++		int cacheBytes = dev->param.n_caches * sizeof(yaffs_cache_t);
+ 
+-		if (dev->nShortOpCaches > YAFFS_MAX_SHORT_OP_CACHES)
+-			dev->nShortOpCaches = YAFFS_MAX_SHORT_OP_CACHES;
++		if (dev->param.n_caches > YAFFS_MAX_SHORT_OP_CACHES)
++			dev->param.n_caches = YAFFS_MAX_SHORT_OP_CACHES;
+ 
+-		dev->srCache =  YMALLOC(srCacheBytes);
++		dev->cache =  YMALLOC(cacheBytes);
+ 
+-		buf = (__u8 *) dev->srCache;
++		buf = (__u8 *) dev->cache;
+ 
+-		if (dev->srCache)
+-			memset(dev->srCache, 0, srCacheBytes);
++		if (dev->cache)
++			memset(dev->cache, 0, cacheBytes);
+ 
+-		for (i = 0; i < dev->nShortOpCaches && buf; i++) {
+-			dev->srCache[i].object = NULL;
+-			dev->srCache[i].lastUse = 0;
+-			dev->srCache[i].dirty = 0;
+-			dev->srCache[i].data = buf = YMALLOC_DMA(dev->totalBytesPerChunk);
++		for (i = 0; i < dev->param.n_caches && buf; i++) {
++			dev->cache[i].object = NULL;
++			dev->cache[i].last_use = 0;
++			dev->cache[i].dirty = 0;
++			dev->cache[i].data = buf = YMALLOC_DMA(dev->param.total_bytes_per_chunk);
+ 		}
+ 		if (!buf)
+ 			init_failed = 1;
+ 
+-		dev->srLastUse = 0;
++		dev->cache_last_use = 0;
+ 	}
+ 
+-	dev->cacheHits = 0;
++	dev->cache_hits = 0;
+ 
+ 	if (!init_failed) {
+-		dev->gcCleanupList = YMALLOC(dev->nChunksPerBlock * sizeof(__u32));
+-		if (!dev->gcCleanupList)
++		dev->gc_cleanup_list = YMALLOC(dev->param.chunks_per_block * sizeof(__u32));
++		if (!dev->gc_cleanup_list)
+ 			init_failed = 1;
+ 	}
+ 
+-	if (dev->isYaffs2)
+-		dev->useHeaderFileSize = 1;
++	if (dev->param.is_yaffs2)
++		dev->param.use_header_file_size = 1;
+ 
+-	if (!init_failed && !yaffs_InitialiseBlocks(dev))
++	if (!init_failed && !yaffs_init_blocks(dev))
+ 		init_failed = 1;
+ 
+-	yaffs_InitialiseTnodes(dev);
+-	yaffs_InitialiseObjects(dev);
++	yaffs_init_tnodes_and_objs(dev);
+ 
+-	if (!init_failed && !yaffs_CreateInitialDirectories(dev))
++	if (!init_failed && !yaffs_create_initial_dir(dev))
+ 		init_failed = 1;
+ 
+ 
+ 	if (!init_failed) {
+ 		/* Now scan the flash. */
+-		if (dev->isYaffs2) {
+-			if (yaffs_CheckpointRestore(dev)) {
+-				yaffs_CheckObjectDetailsLoaded(dev->rootDir);
++		if (dev->param.is_yaffs2) {
++			if (yaffs2_checkpt_restore(dev)) {
++				yaffs_check_obj_details_loaded(dev->root_dir);
+ 				T(YAFFS_TRACE_ALWAYS,
+ 				  (TSTR("yaffs: restored from checkpoint" TENDSTR)));
+ 			} else {
+@@ -7341,128 +5356,129 @@ int yaffs_GutsInitialise(yaffs_Device *d
+ 				/* Clean up the mess caused by an aborted checkpoint load
+ 				 * and scan backwards.
+ 				 */
+-				yaffs_DeinitialiseBlocks(dev);
+-				yaffs_DeinitialiseTnodes(dev);
+-				yaffs_DeinitialiseObjects(dev);
++				yaffs_deinit_blocks(dev);
+ 
++				yaffs_deinit_tnodes_and_objs(dev);
+ 
+-				dev->nErasedBlocks = 0;
+-				dev->nFreeChunks = 0;
+-				dev->allocationBlock = -1;
+-				dev->allocationPage = -1;
+-				dev->nDeletedFiles = 0;
+-				dev->nUnlinkedFiles = 0;
+-				dev->nBackgroundDeletions = 0;
+-				dev->oldestDirtySequence = 0;
++				dev->n_erased_blocks = 0;
++				dev->n_free_chunks = 0;
++				dev->alloc_block = -1;
++				dev->alloc_page = -1;
++				dev->n_deleted_files = 0;
++				dev->n_unlinked_files = 0;
++				dev->n_bg_deletions = 0;
+ 
+-				if (!init_failed && !yaffs_InitialiseBlocks(dev))
++				if (!init_failed && !yaffs_init_blocks(dev))
+ 					init_failed = 1;
+ 
+-				yaffs_InitialiseTnodes(dev);
+-				yaffs_InitialiseObjects(dev);
++				yaffs_init_tnodes_and_objs(dev);
+ 
+-				if (!init_failed && !yaffs_CreateInitialDirectories(dev))
++				if (!init_failed && !yaffs_create_initial_dir(dev))
+ 					init_failed = 1;
+ 
+-				if (!init_failed && !yaffs_ScanBackwards(dev))
++				if (!init_failed && !yaffs2_scan_backwards(dev))
+ 					init_failed = 1;
+ 			}
+-		} else if (!yaffs_Scan(dev))
++		} else if (!yaffs1_scan(dev))
+ 				init_failed = 1;
+ 
+-		yaffs_StripDeletedObjects(dev);
++		yaffs_strip_deleted_objs(dev);
++		yaffs_fix_hanging_objs(dev);
++		if(dev->param.empty_lost_n_found)
++			yaffs_empty_l_n_f(dev);
+ 	}
+ 
+ 	if (init_failed) {
+ 		/* Clean up the mess */
+ 		T(YAFFS_TRACE_TRACING,
+-		  (TSTR("yaffs: yaffs_GutsInitialise() aborted.\n" TENDSTR)));
++		  (TSTR("yaffs: yaffs_guts_initialise() aborted.\n" TENDSTR)));
+ 
+-		yaffs_Deinitialise(dev);
++		yaffs_deinitialise(dev);
+ 		return YAFFS_FAIL;
+ 	}
+ 
+ 	/* Zero out stats */
+-	dev->nPageReads = 0;
+-	dev->nPageWrites = 0;
+-	dev->nBlockErasures = 0;
+-	dev->nGCCopies = 0;
+-	dev->nRetriedWrites = 0;
+-
+-	dev->nRetiredBlocks = 0;
+-
+-	yaffs_VerifyFreeChunks(dev);
+-	yaffs_VerifyBlocks(dev);
+-
++	dev->n_page_reads = 0;
++	dev->n_page_writes = 0;
++	dev->n_erasures = 0;
++	dev->n_gc_copies = 0;
++	dev->n_retired_writes = 0;
++
++	dev->n_retired_blocks = 0;
++
++	yaffs_verify_free_chunks(dev);
++	yaffs_verify_blocks(dev);
++
++	/* Clean up any aborted checkpoint data */
++	if(!dev->is_checkpointed && dev->blocks_in_checkpt > 0)
++		yaffs2_checkpt_invalidate(dev);
+ 
+ 	T(YAFFS_TRACE_TRACING,
+-	  (TSTR("yaffs: yaffs_GutsInitialise() done.\n" TENDSTR)));
++	  (TSTR("yaffs: yaffs_guts_initialise() done.\n" TENDSTR)));
+ 	return YAFFS_OK;
+ 
+ }
+ 
+-void yaffs_Deinitialise(yaffs_Device *dev)
++void yaffs_deinitialise(yaffs_dev_t *dev)
+ {
+-	if (dev->isMounted) {
++	if (dev->is_mounted) {
+ 		int i;
+ 
+-		yaffs_DeinitialiseBlocks(dev);
+-		yaffs_DeinitialiseTnodes(dev);
+-		yaffs_DeinitialiseObjects(dev);
+-		if (dev->nShortOpCaches > 0 &&
+-		    dev->srCache) {
++		yaffs_deinit_blocks(dev);
++		yaffs_deinit_tnodes_and_objs(dev);
++		if (dev->param.n_caches > 0 &&
++		    dev->cache) {
+ 
+-			for (i = 0; i < dev->nShortOpCaches; i++) {
+-				if (dev->srCache[i].data)
+-					YFREE(dev->srCache[i].data);
+-				dev->srCache[i].data = NULL;
++			for (i = 0; i < dev->param.n_caches; i++) {
++				if (dev->cache[i].data)
++					YFREE(dev->cache[i].data);
++				dev->cache[i].data = NULL;
+ 			}
+ 
+-			YFREE(dev->srCache);
+-			dev->srCache = NULL;
++			YFREE(dev->cache);
++			dev->cache = NULL;
+ 		}
+ 
+-		YFREE(dev->gcCleanupList);
++		YFREE(dev->gc_cleanup_list);
+ 
+ 		for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++)
+-			YFREE(dev->tempBuffer[i].buffer);
++			YFREE(dev->temp_buffer[i].buffer);
+ 
+-		dev->isMounted = 0;
++		dev->is_mounted = 0;
+ 
+-		if (dev->deinitialiseNAND)
+-			dev->deinitialiseNAND(dev);
++		if (dev->param.deinitialise_flash_fn)
++			dev->param.deinitialise_flash_fn(dev);
+ 	}
+ }
+ 
+-static int yaffs_CountFreeChunks(yaffs_Device *dev)
++int yaffs_count_free_chunks(yaffs_dev_t *dev)
+ {
+-	int nFree;
++	int nFree=0;
+ 	int b;
+ 
+-	yaffs_BlockInfo *blk;
+-
+-	for (nFree = 0, b = dev->internalStartBlock; b <= dev->internalEndBlock;
+-			b++) {
+-		blk = yaffs_GetBlockInfo(dev, b);
++	yaffs_block_info_t *blk;
+ 
+-		switch (blk->blockState) {
++	blk = dev->block_info;
++	for (b = dev->internal_start_block; b <= dev->internal_end_block; b++) {
++		switch (blk->block_state) {
+ 		case YAFFS_BLOCK_STATE_EMPTY:
+ 		case YAFFS_BLOCK_STATE_ALLOCATING:
+ 		case YAFFS_BLOCK_STATE_COLLECTING:
+ 		case YAFFS_BLOCK_STATE_FULL:
+ 			nFree +=
+-			    (dev->nChunksPerBlock - blk->pagesInUse +
+-			     blk->softDeletions);
++			    (dev->param.chunks_per_block - blk->pages_in_use +
++			     blk->soft_del_pages);
+ 			break;
+ 		default:
+ 			break;
+ 		}
++		blk++;
+ 	}
+ 
+ 	return nFree;
+ }
+ 
+-int yaffs_GetNumberOfFreeChunks(yaffs_Device *dev)
++int yaffs_get_n_free_chunks(yaffs_dev_t *dev)
+ {
+ 	/* This is what we report to the outside world */
+ 
+@@ -7472,30 +5488,28 @@ int yaffs_GetNumberOfFreeChunks(yaffs_De
+ 	int i;
+ 
+ #if 1
+-	nFree = dev->nFreeChunks;
++	nFree = dev->n_free_chunks;
+ #else
+-	nFree = yaffs_CountFreeChunks(dev);
++	nFree = yaffs_count_free_chunks(dev);
+ #endif
+ 
+-	nFree += dev->nDeletedFiles;
++	nFree += dev->n_deleted_files;
+ 
+ 	/* Now count the number of dirty chunks in the cache and subtract those */
+ 
+-	for (nDirtyCacheChunks = 0, i = 0; i < dev->nShortOpCaches; i++) {
+-		if (dev->srCache[i].dirty)
++	for (nDirtyCacheChunks = 0, i = 0; i < dev->param.n_caches; i++) {
++		if (dev->cache[i].dirty)
+ 			nDirtyCacheChunks++;
+ 	}
+ 
+ 	nFree -= nDirtyCacheChunks;
+ 
+-	nFree -= ((dev->nReservedBlocks + 1) * dev->nChunksPerBlock);
++	nFree -= ((dev->param.n_reserved_blocks + 1) * dev->param.chunks_per_block);
+ 
+ 	/* Now we figure out how much to reserve for the checkpoint and report that... */
+-	blocksForCheckpoint = yaffs_CalcCheckpointBlocksRequired(dev) - dev->blocksInCheckpoint;
+-	if (blocksForCheckpoint < 0)
+-		blocksForCheckpoint = 0;
++	blocksForCheckpoint = yaffs_calc_checkpt_blocks_required(dev);
+ 
+-	nFree -= (blocksForCheckpoint * dev->nChunksPerBlock);
++	nFree -= (blocksForCheckpoint * dev->param.chunks_per_block);
+ 
+ 	if (nFree < 0)
+ 		nFree = 0;
+@@ -7504,49 +5518,27 @@ int yaffs_GetNumberOfFreeChunks(yaffs_De
+ 
+ }
+ 
+-static int yaffs_freeVerificationFailures;
+-
+-static void yaffs_VerifyFreeChunks(yaffs_Device *dev)
+-{
+-	int counted;
+-	int difference;
+-
+-	if (yaffs_SkipVerification(dev))
+-		return;
+-
+-	counted = yaffs_CountFreeChunks(dev);
+-
+-	difference = dev->nFreeChunks - counted;
+-
+-	if (difference) {
+-		T(YAFFS_TRACE_ALWAYS,
+-		  (TSTR("Freechunks verification failure %d %d %d" TENDSTR),
+-		   dev->nFreeChunks, counted, difference));
+-		yaffs_freeVerificationFailures++;
+-	}
+-}
+ 
+ /*---------------------------------------- YAFFS test code ----------------------*/
+ 
+-#define yaffs_CheckStruct(structure, syze, name) \
++#define yaffs_check_struct(structure, syze, name) \
+ 	do { \
+ 		if (sizeof(structure) != syze) { \
+ 			T(YAFFS_TRACE_ALWAYS, (TSTR("%s should be %d but is %d\n" TENDSTR),\
+-				name, syze, sizeof(structure))); \
++				name, syze, (int) sizeof(structure))); \
+ 			return YAFFS_FAIL; \
+ 		} \
+ 	} while (0)
+ 
+-static int yaffs_CheckStructures(void)
++static int yaffs_check_structures(void)
+ {
+-/*      yaffs_CheckStruct(yaffs_Tags,8,"yaffs_Tags"); */
+-/*      yaffs_CheckStruct(yaffs_TagsUnion,8,"yaffs_TagsUnion"); */
+-/*      yaffs_CheckStruct(yaffs_Spare,16,"yaffs_Spare"); */
+-#ifndef CONFIG_YAFFS_TNODE_LIST_DEBUG
+-	yaffs_CheckStruct(yaffs_Tnode, 2 * YAFFS_NTNODES_LEVEL0, "yaffs_Tnode");
+-#endif
++/*      yaffs_check_struct(yaffs_tags_t,8,"yaffs_tags_t"); */
++/*      yaffs_check_struct(yaffs_tags_union_t,8,"yaffs_tags_union_t"); */
++/*      yaffs_check_struct(yaffs_spare,16,"yaffs_spare"); */
++/*	yaffs_check_struct(yaffs_tnode_t, 2 * YAFFS_NTNODES_LEVEL0, "yaffs_tnode_t"); */
++
+ #ifndef CONFIG_YAFFS_WINCE
+-	yaffs_CheckStruct(yaffs_ObjectHeader, 512, "yaffs_ObjectHeader");
++	yaffs_check_struct(yaffs_obj_header, 512, "yaffs_obj_header");
+ #endif
+ 	return YAFFS_OK;
+ }
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffs_guts.h linux-2.6.36-rc8.new/fs/yaffs2/yaffs_guts.h
+--- linux-2.6.36-rc8/fs/yaffs2/yaffs_guts.h	2010-10-20 13:17:58.954000294 +0300
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffs_guts.h	2010-10-20 13:28:16.061000294 +0300
+@@ -1,7 +1,7 @@
+ /*
+  * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+  *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+  *   for Toby Churchill Ltd and Brightstar Engineering
+  *
+  * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -16,8 +16,9 @@
+ #ifndef __YAFFS_GUTS_H__
+ #define __YAFFS_GUTS_H__
+ 
+-#include "devextras.h"
+ #include "yportenv.h"
++#include "devextras.h"
++#include "yaffs_list.h"
+ 
+ #define YAFFS_OK	1
+ #define YAFFS_FAIL  0
+@@ -52,7 +53,6 @@
+ 
+ #define YAFFS_MAX_CHUNK_ID		0x000FFFFF
+ 
+-#define YAFFS_UNUSED_OBJECT_ID		0x0003FFFF
+ 
+ #define YAFFS_ALLOCATION_NOBJECTS	100
+ #define YAFFS_ALLOCATION_NTNODES	100
+@@ -62,8 +62,9 @@
+ 
+ 
+ #define YAFFS_OBJECT_SPACE		0x40000
++#define YAFFS_MAX_OBJECT_ID		(YAFFS_OBJECT_SPACE -1)
+ 
+-#define YAFFS_CHECKPOINT_VERSION 	3
++#define YAFFS_CHECKPOINT_VERSION 	4
+ 
+ #ifdef CONFIG_YAFFS_UNICODE
+ #define YAFFS_MAX_NAME_LENGTH		127
+@@ -81,12 +82,11 @@
+ #define YAFFS_OBJECTID_UNLINKED		3
+ #define YAFFS_OBJECTID_DELETED		4
+ 
+-/* Sseudo object ids for checkpointing */
++/* Pseudo object ids for checkpointing */
+ #define YAFFS_OBJECTID_SB_HEADER	0x10
+ #define YAFFS_OBJECTID_CHECKPOINT_DATA	0x20
+ #define YAFFS_SEQUENCE_CHECKPOINT_DATA  0x21
+ 
+-/* */
+ 
+ #define YAFFS_MAX_SHORT_OP_CACHES	20
+ 
+@@ -113,18 +113,14 @@
+ 
+ /* ChunkCache is used for short read/write operations.*/
+ typedef struct {
+-	struct yaffs_ObjectStruct *object;
+-	int chunkId;
+-	int lastUse;
++	struct yaffs_obj_s *object;
++	int chunk_id;
++	int last_use;
+ 	int dirty;
+-	int nBytes;		/* Only valid if the cache is dirty */
++	int n_bytes;		/* Only valid if the cache is dirty */
+ 	int locked;		/* Can't push out or flush while locked. */
+-#ifdef CONFIG_YAFFS_YAFFS2
+ 	__u8 *data;
+-#else
+-	__u8 data[YAFFS_BYTES_PER_CHUNK];
+-#endif
+-} yaffs_ChunkCache;
++} yaffs_cache_t;
+ 
+ 
+ 
+@@ -135,18 +131,18 @@ typedef struct {
+ 
+ #ifndef CONFIG_YAFFS_NO_YAFFS1
+ typedef struct {
+-	unsigned chunkId:20;
+-	unsigned serialNumber:2;
+-	unsigned byteCountLSB:10;
+-	unsigned objectId:18;
++	unsigned chunk_id:20;
++	unsigned serial_number:2;
++	unsigned n_bytes_lsb:10;
++	unsigned obj_id:18;
+ 	unsigned ecc:12;
+-	unsigned byteCountMSB:2;
+-} yaffs_Tags;
++	unsigned n_bytes_msb:2;
++} yaffs_tags_t;
+ 
+ typedef union {
+-	yaffs_Tags asTags;
+-	__u8 asBytes[8];
+-} yaffs_TagsUnion;
++	yaffs_tags_t as_tags;
++	__u8 as_bytes[8];
++} yaffs_tags_union_t;
+ 
+ #endif
+ 
+@@ -157,7 +153,7 @@ typedef enum {
+ 	YAFFS_ECC_RESULT_NO_ERROR,
+ 	YAFFS_ECC_RESULT_FIXED,
+ 	YAFFS_ECC_RESULT_UNFIXED
+-} yaffs_ECCResult;
++} yaffs_ecc_result;
+ 
+ typedef enum {
+ 	YAFFS_OBJECT_TYPE_UNKNOWN,
+@@ -166,64 +162,64 @@ typedef enum {
+ 	YAFFS_OBJECT_TYPE_DIRECTORY,
+ 	YAFFS_OBJECT_TYPE_HARDLINK,
+ 	YAFFS_OBJECT_TYPE_SPECIAL
+-} yaffs_ObjectType;
++} yaffs_obj_type;
+ 
+ #define YAFFS_OBJECT_TYPE_MAX YAFFS_OBJECT_TYPE_SPECIAL
+ 
+ typedef struct {
+ 
+-	unsigned validMarker0;
+-	unsigned chunkUsed;	/*  Status of the chunk: used or unused */
+-	unsigned objectId;	/* If 0 then this is not part of an object (unused) */
+-	unsigned chunkId;	/* If 0 then this is a header, else a data chunk */
+-	unsigned byteCount;	/* Only valid for data chunks */
++	unsigned validity1;
++	unsigned chunk_used;	/*  Status of the chunk: used or unused */
++	unsigned obj_id;	/* If 0 then this is not part of an object (unused) */
++	unsigned chunk_id;	/* If 0 then this is a header, else a data chunk */
++	unsigned n_bytes;	/* Only valid for data chunks */
+ 
+ 	/* The following stuff only has meaning when we read */
+-	yaffs_ECCResult eccResult;
+-	unsigned blockBad;
++	yaffs_ecc_result ecc_result;
++	unsigned block_bad;
+ 
+ 	/* YAFFS 1 stuff */
+-	unsigned chunkDeleted;	/* The chunk is marked deleted */
+-	unsigned serialNumber;	/* Yaffs1 2-bit serial number */
++	unsigned is_deleted;	/* The chunk is marked deleted */
++	unsigned serial_number;	/* Yaffs1 2-bit serial number */
+ 
+ 	/* YAFFS2 stuff */
+-	unsigned sequenceNumber;	/* The sequence number of this block */
++	unsigned seq_number;	/* The sequence number of this block */
+ 
+ 	/* Extra info if this is an object header (YAFFS2 only) */
+ 
+-	unsigned extraHeaderInfoAvailable;	/* There is extra info available if this is not zero */
+-	unsigned extraParentObjectId;	/* The parent object */
+-	unsigned extraIsShrinkHeader;	/* Is it a shrink header? */
+-	unsigned extraShadows;		/* Does this shadow another object? */
++	unsigned extra_available;	/* There is extra info available if this is not zero */
++	unsigned extra_parent_id;	/* The parent object */
++	unsigned extra_is_shrink;	/* Is it a shrink header? */
++	unsigned extra_shadows;		/* Does this shadow another object? */
+ 
+-	yaffs_ObjectType extraObjectType;	/* What object type? */
++	yaffs_obj_type extra_obj_type;	/* What object type? */
+ 
+-	unsigned extraFileLength;		/* Length if it is a file */
+-	unsigned extraEquivalentObjectId;	/* Equivalent object Id if it is a hard link */
++	unsigned extra_length;		/* Length if it is a file */
++	unsigned extra_equiv_id;	/* Equivalent object Id if it is a hard link */
+ 
+-	unsigned validMarker1;
++	unsigned validty1;
+ 
+-} yaffs_ExtendedTags;
++} yaffs_ext_tags;
+ 
+ /* Spare structure for YAFFS1 */
+ typedef struct {
+-	__u8 tagByte0;
+-	__u8 tagByte1;
+-	__u8 tagByte2;
+-	__u8 tagByte3;
+-	__u8 pageStatus;	/* set to 0 to delete the chunk */
+-	__u8 blockStatus;
+-	__u8 tagByte4;
+-	__u8 tagByte5;
++	__u8 tb0;
++	__u8 tb1;
++	__u8 tb2;
++	__u8 tb3;
++	__u8 page_status;	/* set to 0 to delete the chunk */
++	__u8 block_status;
++	__u8 tb4;
++	__u8 tb5;
+ 	__u8 ecc1[3];
+-	__u8 tagByte6;
+-	__u8 tagByte7;
++	__u8 tb6;
++	__u8 tb7;
+ 	__u8 ecc2[3];
+-} yaffs_Spare;
++} yaffs_spare;
+ 
+ /*Special structure for passing through to mtd */
+-struct yaffs_NANDSpare {
+-	yaffs_Spare spare;
++struct yaffs_nand_spare {
++	yaffs_spare spare;
+ 	int eccres1;
+ 	int eccres2;
+ };
+@@ -234,6 +230,8 @@ typedef enum {
+ 	YAFFS_BLOCK_STATE_UNKNOWN = 0,
+ 
+ 	YAFFS_BLOCK_STATE_SCANNING,
++        /* Being scanned */
++
+ 	YAFFS_BLOCK_STATE_NEEDS_SCANNING,
+ 	/* The block might have something on it (ie it is allocating or full, perhaps empty)
+ 	 * but it needs to be scanned to determine its true state.
+@@ -249,67 +247,69 @@ typedef enum {
+ 	/* This block is partially allocated.
+ 	 * At least one page holds valid data.
+ 	 * This is the one currently being used for page
+-	 * allocation. Should never be more than one of these
++	 * allocation. Should never be more than one of these.
++         * If a block is only partially allocated at mount it is treated as full.
+ 	 */
+ 
+ 	YAFFS_BLOCK_STATE_FULL,
+ 	/* All the pages in this block have been allocated.
++         * If a block was only partially allocated when mounted we treat
++         * it as fully allocated.
+ 	 */
+ 
+ 	YAFFS_BLOCK_STATE_DIRTY,
+-	/* All pages have been allocated and deleted.
++	/* The block was full and now all chunks have been deleted.
+ 	 * Erase me, reuse me.
+ 	 */
+ 
+ 	YAFFS_BLOCK_STATE_CHECKPOINT,
+-	/* This block is assigned to holding checkpoint data.
+-	 */
++	/* This block is assigned to holding checkpoint data. */
+ 
+ 	YAFFS_BLOCK_STATE_COLLECTING,
+ 	/* This block is being garbage collected */
+ 
+ 	YAFFS_BLOCK_STATE_DEAD
+ 	/* This block has failed and is not in use */
+-} yaffs_BlockState;
++} yaffs_block_state_t;
+ 
+ #define	YAFFS_NUMBER_OF_BLOCK_STATES (YAFFS_BLOCK_STATE_DEAD + 1)
+ 
+ 
+ typedef struct {
+ 
+-	int softDeletions:10;	/* number of soft deleted pages */
+-	int pagesInUse:10;	/* number of pages in use */
+-	unsigned blockState:4;	/* One of the above block states. NB use unsigned because enum is sometimes an int */
+-	__u32 needsRetiring:1;	/* Data has failed on this block, need to get valid data off */
++	int soft_del_pages:10;	/* number of soft deleted pages */
++	int pages_in_use:10;	/* number of pages in use */
++	unsigned block_state:4;	/* One of the above block states. NB use unsigned because enum is sometimes an int */
++	__u32 needs_retiring:1;	/* Data has failed on this block, need to get valid data off */
+ 				/* and retire the block. */
+-	__u32 skipErasedCheck:1; /* If this is set we can skip the erased check on this block */
+-	__u32 gcPrioritise:1; 	/* An ECC check or blank check has failed on this block.
++	__u32 skip_erased_check:1; /* If this is set we can skip the erased check on this block */
++	__u32 gc_prioritise:1; 	/* An ECC check or blank check has failed on this block.
+ 				   It should be prioritised for GC */
+-	__u32 chunkErrorStrikes:3; /* How many times we've had ecc etc failures on this block and tried to reuse it */
++	__u32 chunk_error_strikes:3; /* How many times we've had ecc etc failures on this block and tried to reuse it */
+ 
+ #ifdef CONFIG_YAFFS_YAFFS2
+-	__u32 hasShrinkHeader:1; /* This block has at least one shrink object header */
+-	__u32 sequenceNumber;	 /* block sequence number for yaffs2 */
++	__u32 has_shrink_hdr:1; /* This block has at least one shrink object header */
++	__u32 seq_number;	 /* block sequence number for yaffs2 */
+ #endif
+ 
+-} yaffs_BlockInfo;
++} yaffs_block_info_t;
+ 
+ /* -------------------------- Object structure -------------------------------*/
+ /* This is the object structure as stored on NAND */
+ 
+ typedef struct {
+-	yaffs_ObjectType type;
++	yaffs_obj_type type;
+ 
+ 	/* Apply to everything  */
+-	int parentObjectId;
+-	__u16 sum__NoLongerUsed;        /* checksum of name. No longer used */
++	int parent_obj_id;
++	__u16 sum_no_longer_used;        /* checksum of name. No longer used */
+ 	YCHAR name[YAFFS_MAX_NAME_LENGTH + 1];
+ 
+ 	/* The following apply to directories, files, symlinks - not hard links */
+ 	__u32 yst_mode;         /* protection */
+ 
+ #ifdef CONFIG_YAFFS_WINCE
+-	__u32 notForWinCE[5];
++	__u32 not_for_wince[5];
+ #else
+ 	__u32 yst_uid;
+ 	__u32 yst_gid;
+@@ -319,10 +319,10 @@ typedef struct {
+ #endif
+ 
+ 	/* File size  applies to files only */
+-	int fileSize;
++	int file_size;
+ 
+ 	/* Equivalent object id applies to hard links only. */
+-	int equivalentObjectId;
++	int equiv_id;
+ 
+ 	/* Alias is for symlinks only. */
+ 	YCHAR alias[YAFFS_MAX_ALIAS_LENGTH + 1];
+@@ -334,40 +334,29 @@ typedef struct {
+ 	__u32 win_atime[2];
+ 	__u32 win_mtime[2];
+ #else
+-	__u32 roomToGrow[6];
++	__u32 room_to_grow[6];
+ 
+ #endif
+-	__u32 inbandShadowsObject;
+-	__u32 inbandIsShrink;
++	__u32 inband_shadowed_obj_id;
++	__u32 inband_is_shrink;
+ 
+-	__u32 reservedSpace[2];
+-	int shadowsObject;	/* This object header shadows the specified object if > 0 */
++	__u32 reserved[2];
++	int shadows_obj;	/* This object header shadows the specified object if > 0 */
+ 
+-	/* isShrink applies to object headers written when we shrink the file (ie resize) */
+-	__u32 isShrink;
++	/* is_shrink applies to object headers written when we shrink the file (ie resize) */
++	__u32 is_shrink;
+ 
+-} yaffs_ObjectHeader;
++} yaffs_obj_header;
+ 
+ /*--------------------------- Tnode -------------------------- */
+ 
+-union yaffs_Tnode_union {
+-#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
+-	union yaffs_Tnode_union *internal[YAFFS_NTNODES_INTERNAL + 1];
+-#else
+-	union yaffs_Tnode_union *internal[YAFFS_NTNODES_INTERNAL];
+-#endif
+-/*	__u16 level0[YAFFS_NTNODES_LEVEL0]; */
++union yaffs_tnode_union {
++	union yaffs_tnode_union *internal[YAFFS_NTNODES_INTERNAL];
+ 
+ };
+ 
+-typedef union yaffs_Tnode_union yaffs_Tnode;
++typedef union yaffs_tnode_union yaffs_tnode_t;
+ 
+-struct yaffs_TnodeList_struct {
+-	struct yaffs_TnodeList_struct *next;
+-	yaffs_Tnode *tnodes;
+-};
+-
+-typedef struct yaffs_TnodeList_struct yaffs_TnodeList;
+ 
+ /*------------------------  Object -----------------------------*/
+ /* An object can be one of:
+@@ -378,82 +367,85 @@ typedef struct yaffs_TnodeList_struct ya
+  */
+ 
+ typedef struct {
+-	__u32 fileSize;
+-	__u32 scannedFileSize;
+-	__u32 shrinkSize;
+-	int topLevel;
+-	yaffs_Tnode *top;
+-} yaffs_FileStructure;
++	__u32 file_size;
++	__u32 scanned_size;
++	__u32 shrink_size;
++	int top_level;
++	yaffs_tnode_t *top;
++} yaffs_file_s;
+ 
+ typedef struct {
+ 	struct ylist_head children;     /* list of child links */
+-} yaffs_DirectoryStructure;
++	struct ylist_head dirty;	/* Entry for list of dirty directories */
++} yaffs_dir_s;
+ 
+ typedef struct {
+ 	YCHAR *alias;
+-} yaffs_SymLinkStructure;
++} yaffs_symlink_t;
+ 
+ typedef struct {
+-	struct yaffs_ObjectStruct *equivalentObject;
+-	__u32 equivalentObjectId;
+-} yaffs_HardLinkStructure;
++	struct yaffs_obj_s *equiv_obj;
++	__u32 equiv_id;
++} yaffs_hard_link_s;
+ 
+ typedef union {
+-	yaffs_FileStructure fileVariant;
+-	yaffs_DirectoryStructure directoryVariant;
+-	yaffs_SymLinkStructure symLinkVariant;
+-	yaffs_HardLinkStructure hardLinkVariant;
+-} yaffs_ObjectVariant;
++	yaffs_file_s file_variant;
++	yaffs_dir_s dir_variant;
++	yaffs_symlink_t symlink_variant;
++	yaffs_hard_link_s hardlink_variant;
++} yaffs_obj_variant;
++
++
+ 
+-struct yaffs_ObjectStruct {
++struct yaffs_obj_s {
+ 	__u8 deleted:1;		/* This should only apply to unlinked files. */
+-	__u8 softDeleted:1;	/* it has also been soft deleted */
++	__u8 soft_del:1;	/* it has also been soft deleted */
+ 	__u8 unlinked:1;	/* An unlinked file. The file should be in the unlinked directory.*/
+ 	__u8 fake:1;		/* A fake object has no presence on NAND. */
+-	__u8 renameAllowed:1;	/* Some objects are not allowed to be renamed. */
+-	__u8 unlinkAllowed:1;
++	__u8 rename_allowed:1;	/* Some objects are not allowed to be renamed. */
++	__u8 unlink_allowed:1;
+ 	__u8 dirty:1;		/* the object needs to be written to flash */
+ 	__u8 valid:1;		/* When the file system is being loaded up, this
+ 				 * object might be created before the data
+ 				 * is available (ie. file data records appear before the header).
+ 				 */
+-	__u8 lazyLoaded:1;	/* This object has been lazy loaded and is missing some detail */
++	__u8 lazy_loaded:1;	/* This object has been lazy loaded and is missing some detail */
+ 
+-	__u8 deferedFree:1;	/* For Linux kernel. Object is removed from NAND, but is
++	__u8 defered_free:1;	/* For Linux kernel. Object is removed from NAND, but is
+ 				 * still in the inode cache. Free of object is defered.
+ 				 * until the inode is released.
+ 				 */
+-	__u8 beingCreated:1;	/* This object is still being created so skip some checks. */
++	__u8 being_created:1;	/* This object is still being created so skip some checks. */
++	__u8 is_shadowed:1;	/* This object is shadowed on the way to being renamed. */
++
++	__u8 xattr_known:1;	/* We know if this has object has xattribs or not. */
++	__u8 has_xattr:1;	/* This object has xattribs. Valid if xattr_known. */
+ 
+ 	__u8 serial;		/* serial number of chunk in NAND. Cached here */
+ 	__u16 sum;		/* sum of the name to speed searching */
+ 
+-	struct yaffs_DeviceStruct *myDev;       /* The device I'm on */
++	struct yaffs_dev_s *my_dev;       /* The device I'm on */
+ 
+-	struct ylist_head hashLink;     /* list of objects in this hash bucket */
++	struct ylist_head hash_link;     /* list of objects in this hash bucket */
+ 
+-	struct ylist_head hardLinks;    /* all the equivalent hard linked objects */
++	struct ylist_head hard_links;    /* all the equivalent hard linked objects */
+ 
+ 	/* directory structure stuff */
+ 	/* also used for linking up the free list */
+-	struct yaffs_ObjectStruct *parent;
++	struct yaffs_obj_s *parent;
+ 	struct ylist_head siblings;
+ 
+ 	/* Where's my object header in NAND? */
+-	int hdrChunk;
++	int hdr_chunk;
+ 
+-	int nDataChunks;	/* Number of data chunks attached to the file. */
++	int n_data_chunks;	/* Number of data chunks attached to the file. */
+ 
+-	__u32 objectId;		/* the object id value */
++	__u32 obj_id;		/* the object id value */
+ 
+ 	__u32 yst_mode;
+ 
+ #ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
+-	YCHAR shortName[YAFFS_SHORT_NAME_LENGTH + 1];
+-#endif
+-
+-#ifndef __KERNEL__
+-	__u32 inUse;
++	YCHAR short_name[YAFFS_SHORT_NAME_LENGTH + 1];
+ #endif
+ 
+ #ifdef CONFIG_YAFFS_WINCE
+@@ -470,53 +462,43 @@ struct yaffs_ObjectStruct {
+ 
+ 	__u32 yst_rdev;
+ 
+-#ifdef __KERNEL__
+-	struct inode *myInode;
++	void *my_inode;
+ 
+-#endif
++	yaffs_obj_type variant_type;
+ 
+-	yaffs_ObjectType variantType;
++	yaffs_obj_variant variant;
+ 
+-	yaffs_ObjectVariant variant;
+-
+-};
+-
+-typedef struct yaffs_ObjectStruct yaffs_Object;
+-
+-struct yaffs_ObjectList_struct {
+-	yaffs_Object *objects;
+-	struct yaffs_ObjectList_struct *next;
+ };
+ 
+-typedef struct yaffs_ObjectList_struct yaffs_ObjectList;
++typedef struct yaffs_obj_s yaffs_obj_t;
+ 
+ typedef struct {
+ 	struct ylist_head list;
+ 	int count;
+-} yaffs_ObjectBucket;
++} yaffs_obj_bucket;
+ 
+ 
+-/* yaffs_CheckpointObject holds the definition of an object as dumped
++/* yaffs_checkpt_obj_t holds the definition of an object as dumped
+  * by checkpointing.
+  */
+ 
+ typedef struct {
+-	int structType;
+-	__u32 objectId;
+-	__u32 parentId;
+-	int hdrChunk;
+-	yaffs_ObjectType variantType:3;
++	int struct_type;
++	__u32 obj_id;
++	__u32 parent_id;
++	int hdr_chunk;
++	yaffs_obj_type variant_type:3;
+ 	__u8 deleted:1;
+-	__u8 softDeleted:1;
++	__u8 soft_del:1;
+ 	__u8 unlinked:1;
+ 	__u8 fake:1;
+-	__u8 renameAllowed:1;
+-	__u8 unlinkAllowed:1;
++	__u8 rename_allowed:1;
++	__u8 unlink_allowed:1;
+ 	__u8 serial;
+ 
+-	int nDataChunks;
+-	__u32 fileSizeOrEquivalentObjectId;
+-} yaffs_CheckpointObject;
++	int n_data_chunks;
++	__u32 size_or_equiv_obj;
++} yaffs_checkpt_obj_t;
+ 
+ /*--------------------- Temporary buffers ----------------
+  *
+@@ -526,379 +508,462 @@ typedef struct {
+ typedef struct {
+ 	__u8 *buffer;
+ 	int line;	/* track from whence this buffer was allocated */
+-	int maxLine;
+-} yaffs_TempBuffer;
++	int max_line;
++} yaffs_buffer_t;
+ 
+ /*----------------- Device ---------------------------------*/
+ 
+-struct yaffs_DeviceStruct {
+-	struct ylist_head devList;
+-	const char *name;
+-
+-	/* Entry parameters set up way early. Yaffs sets up the rest.*/
+-	int nDataBytesPerChunk;	/* Should be a power of 2 >= 512 */
+-	int nChunksPerBlock;	/* does not need to be a power of 2 */
+-	int spareBytesPerChunk;	/* spare area size */
+-	int startBlock;		/* Start block we're allowed to use */
+-	int endBlock;		/* End block we're allowed to use */
+-	int nReservedBlocks;	/* We want this tuneable so that we can reduce */
+-				/* reserved blocks on NOR and RAM. */
+-
+ 
+-	/* Stuff used by the shared space checkpointing mechanism */
+-	/* If this value is zero, then this mechanism is disabled */
++struct yaffs_param_s {
++	const YCHAR *name;
+ 
+-/*	int nCheckpointReservedBlocks; */ /* Blocks to reserve for checkpoint data */
++	/*
++         * Entry parameters set up way early. Yaffs sets up the rest.
++         * The structure should be zeroed out before use so that unused
++         * and defualt values are zero.
++         */
++
++	int inband_tags;          /* Use unband tags */
++	__u32 total_bytes_per_chunk; /* Should be >= 512, does not need to be a power of 2 */
++	int chunks_per_block;	/* does not need to be a power of 2 */
++	int spare_bytes_per_chunk;	/* spare area size */
++	int start_block;		/* Start block we're allowed to use */
++	int end_block;		/* End block we're allowed to use */
++	int n_reserved_blocks;	/* We want this tuneable so that we can reduce */
++				/* reserved blocks on NOR and RAM. */
+ 
+ 
+-	int nShortOpCaches;	/* If <= 0, then short op caching is disabled, else
+-				 * the number of short op caches (don't use too many)
++	int n_caches;	/* If <= 0, then short op caching is disabled, else
++				 * the number of short op caches (don't use too many).
++                                 * 10 to 20 is a good bet.
+ 				 */
++	int use_nand_ecc;		/* Flag to decide whether or not to use NANDECC on data (yaffs1) */
++	int no_tags_ecc;		/* Flag to decide whether or not to do ECC on packed tags (yaffs2) */ 
+ 
+-	int useHeaderFileSize;	/* Flag to determine if we should use file sizes from the header */
++	int is_yaffs2;           /* Use yaffs2 mode on this device */
+ 
+-	int useNANDECC;		/* Flag to decide whether or not to use NANDECC */
++	int empty_lost_n_found;  /* Auto-empty lost+found directory on mount */
+ 
+-	void *genericDevice;	/* Pointer to device context
+-				 * On an mtd this holds the mtd pointer.
+-				 */
+-	void *superBlock;
++	int refresh_period;	/* How often we should check to do a block refresh */
++
++	/* Checkpoint control. Can be set before or after initialisation */
++	__u8 skip_checkpt_rd;
++	__u8 skip_checkpt_wr;
++
++	int enable_xattr;	/* Enable xattribs */
+ 
+ 	/* NAND access functions (Must be set before calling YAFFS)*/
+ 
+-	int (*writeChunkToNAND) (struct yaffs_DeviceStruct *dev,
+-					int chunkInNAND, const __u8 *data,
+-					const yaffs_Spare *spare);
+-	int (*readChunkFromNAND) (struct yaffs_DeviceStruct *dev,
+-					int chunkInNAND, __u8 *data,
+-					yaffs_Spare *spare);
+-	int (*eraseBlockInNAND) (struct yaffs_DeviceStruct *dev,
+-					int blockInNAND);
+-	int (*initialiseNAND) (struct yaffs_DeviceStruct *dev);
+-	int (*deinitialiseNAND) (struct yaffs_DeviceStruct *dev);
++	int (*write_chunk_fn) (struct yaffs_dev_s *dev,
++					int nand_chunk, const __u8 *data,
++					const yaffs_spare *spare);
++	int (*read_chunk_fn) (struct yaffs_dev_s *dev,
++					int nand_chunk, __u8 *data,
++					yaffs_spare *spare);
++	int (*erase_fn) (struct yaffs_dev_s *dev,
++					int flash_block);
++	int (*initialise_flash_fn) (struct yaffs_dev_s *dev);
++	int (*deinitialise_flash_fn) (struct yaffs_dev_s *dev);
+ 
+ #ifdef CONFIG_YAFFS_YAFFS2
+-	int (*writeChunkWithTagsToNAND) (struct yaffs_DeviceStruct *dev,
+-					 int chunkInNAND, const __u8 *data,
+-					 const yaffs_ExtendedTags *tags);
+-	int (*readChunkWithTagsFromNAND) (struct yaffs_DeviceStruct *dev,
+-					  int chunkInNAND, __u8 *data,
+-					  yaffs_ExtendedTags *tags);
+-	int (*markNANDBlockBad) (struct yaffs_DeviceStruct *dev, int blockNo);
+-	int (*queryNANDBlock) (struct yaffs_DeviceStruct *dev, int blockNo,
+-			       yaffs_BlockState *state, __u32 *sequenceNumber);
+-#endif
+-
+-	int isYaffs2;
+-
+-	/* The removeObjectCallback function must be supplied by OS flavours that
+-	 * need it. The Linux kernel does not use this, but yaffs direct does use
+-	 * it to implement the faster readdir
++	int (*write_chunk_tags_fn) (struct yaffs_dev_s *dev,
++					 int nand_chunk, const __u8 *data,
++					 const yaffs_ext_tags *tags);
++	int (*read_chunk_tags_fn) (struct yaffs_dev_s *dev,
++					  int nand_chunk, __u8 *data,
++					  yaffs_ext_tags *tags);
++	int (*bad_block_fn) (struct yaffs_dev_s *dev, int block_no);
++	int (*query_block_fn) (struct yaffs_dev_s *dev, int block_no,
++			       yaffs_block_state_t *state, __u32 *seq_number);
++#endif
++
++	/* The remove_obj_fn function must be supplied by OS flavours that
++	 * need it.
++         * yaffs direct uses it to implement the faster readdir.
++         * Linux uses it to protect the directory during unlocking.
+ 	 */
+-	void (*removeObjectCallback)(struct yaffs_ObjectStruct *obj);
++	void (*remove_obj_fn)(struct yaffs_obj_s *obj);
+ 
+-	/* Callback to mark the superblock dirsty */
+-	void (*markSuperBlockDirty)(void *superblock);
++	/* Callback to mark the superblock dirty */
++	void (*sb_dirty_fn)(struct yaffs_dev_s *dev);
++	
++	/*  Callback to control garbage collection. */
++	unsigned (*gc_control)(struct yaffs_dev_s *dev);
++
++        /* Debug control flags. Don't use unless you know what you're doing */
++	int use_header_file_size;	/* Flag to determine if we should use file sizes from the header */
++	int disable_lazy_load;	/* Disable lazy loading on this device */
++	int wide_tnodes_disabled; /* Set to disable wide tnodes */
++	int disable_soft_del;  /* yaffs 1 only: Set to disable the use of softdeletion. */
++	
++	int defered_dir_update; /* Set to defer directory updates */
+ 
+-	int wideTnodesDisabled; /* Set to disable wide tnodes */
++#ifdef CONFIG_YAFFS_AUTO_UNICODE
++	int auto_unicode;
++#endif
++	int always_check_erased; /* Force chunk erased check always on */
++};
+ 
+-	YCHAR *pathDividers;	/* String of legal path dividers */
++typedef struct yaffs_param_s yaffs_param_t;
+ 
++struct yaffs_dev_s {
++	struct yaffs_param_s param;
+ 
+-	/* End of stuff that must be set before initialisation. */
++        /* Context storage. Holds extra OS specific data for this device */
+ 
+-	/* Checkpoint control. Can be set before or after initialisation */
+-	__u8 skipCheckpointRead;
+-	__u8 skipCheckpointWrite;
++	void *os_context;
++	void *driver_context;
++
++	struct ylist_head dev_list;
+ 
+ 	/* Runtime parameters. Set up by YAFFS. */
++	int data_bytes_per_chunk;	
+ 
+-	__u16 chunkGroupBits;	/* 0 for devices <= 32MB. else log2(nchunks) - 16 */
+-	__u16 chunkGroupSize;	/* == 2^^chunkGroupBits */
++        /* Non-wide tnode stuff */
++	__u16 chunk_grp_bits;	/* Number of bits that need to be resolved if
++                                 * the tnodes are not wide enough.
++                                 */
++	__u16 chunk_grp_size;	/* == 2^^chunk_grp_bits */
+ 
+ 	/* Stuff to support wide tnodes */
+-	__u32 tnodeWidth;
+-	__u32 tnodeMask;
++	__u32 tnode_width;
++	__u32 tnode_mask;
++	__u32 tnode_size;
+ 
+ 	/* Stuff for figuring out file offset to chunk conversions */
+-	__u32 chunkShift; /* Shift value */
+-	__u32 chunkDiv;   /* Divisor after shifting: 1 for power-of-2 sizes */
+-	__u32 chunkMask;  /* Mask to use for power-of-2 case */
+-
+-	/* Stuff to handle inband tags */
+-	int inbandTags;
+-	__u32 totalBytesPerChunk;
+-
+-#ifdef __KERNEL__
+-
+-	struct semaphore sem;	/* Semaphore for waiting on erasure.*/
+-	struct semaphore grossLock;	/* Gross locking semaphore */
+-	__u8 *spareBuffer;	/* For mtdif2 use. Don't know the size of the buffer
+-				 * at compile time so we have to allocate it.
+-				 */
+-	void (*putSuperFunc) (struct super_block *sb);
+-#endif
++	__u32 chunk_shift; /* Shift value */
++	__u32 chunk_div;   /* Divisor after shifting: 1 for power-of-2 sizes */
++	__u32 chunk_mask;  /* Mask to use for power-of-2 case */
+ 
+-	int isMounted;
+ 
+-	int isCheckpointed;
++
++	int is_mounted;
++	int read_only;
++	int is_checkpointed;
+ 
+ 
+ 	/* Stuff to support block offsetting to support start block zero */
+-	int internalStartBlock;
+-	int internalEndBlock;
+-	int blockOffset;
+-	int chunkOffset;
++	int internal_start_block;
++	int internal_end_block;
++	int block_offset;
++	int chunk_offset;
+ 
+ 
+ 	/* Runtime checkpointing stuff */
+-	int checkpointPageSequence;   /* running sequence number of checkpoint pages */
+-	int checkpointByteCount;
+-	int checkpointByteOffset;
+-	__u8 *checkpointBuffer;
+-	int checkpointOpenForWrite;
+-	int blocksInCheckpoint;
+-	int checkpointCurrentChunk;
+-	int checkpointCurrentBlock;
+-	int checkpointNextBlock;
+-	int *checkpointBlockList;
+-	int checkpointMaxBlocks;
+-	__u32 checkpointSum;
+-	__u32 checkpointXor;
++	int checkpt_page_seq;   /* running sequence number of checkpoint pages */
++	int checkpt_byte_count;
++	int checkpt_byte_offs;
++	__u8 *checkpt_buffer;
++	int checkpt_open_write;
++	int blocks_in_checkpt;
++	int checkpt_cur_chunk;
++	int checkpt_cur_block;
++	int checkpt_next_block;
++	int *checkpt_block_list;
++	int checkpt_max_blocks;
++	__u32 checkpt_sum;
++	__u32 checkpt_xor;
+ 
+-	int nCheckpointBlocksRequired; /* Number of blocks needed to store current checkpoint set */
++	int checkpoint_blocks_required; /* Number of blocks needed to store current checkpoint set */
+ 
+ 	/* Block Info */
+-	yaffs_BlockInfo *blockInfo;
+-	__u8 *chunkBits;	/* bitmap of chunks in use */
+-	unsigned blockInfoAlt:1;	/* was allocated using alternative strategy */
+-	unsigned chunkBitsAlt:1;	/* was allocated using alternative strategy */
+-	int chunkBitmapStride;	/* Number of bytes of chunkBits per block.
+-				 * Must be consistent with nChunksPerBlock.
++	yaffs_block_info_t *block_info;
++	__u8 *chunk_bits;	/* bitmap of chunks in use */
++	unsigned block_info_alt:1;	/* was allocated using alternative strategy */
++	unsigned chunk_bits_alt:1;	/* was allocated using alternative strategy */
++	int chunk_bit_stride;	/* Number of bytes of chunk_bits per block.
++				 * Must be consistent with chunks_per_block.
+ 				 */
+ 
+-	int nErasedBlocks;
+-	int allocationBlock;	/* Current block being allocated off */
+-	__u32 allocationPage;
+-	int allocationBlockFinder;	/* Used to search for next allocation block */
+-
+-	/* Runtime state */
+-	int nTnodesCreated;
+-	yaffs_Tnode *freeTnodes;
+-	int nFreeTnodes;
+-	yaffs_TnodeList *allocatedTnodeList;
+-
+-	int isDoingGC;
+-	int gcBlock;
+-	int gcChunk;
+-
+-	int nObjectsCreated;
+-	yaffs_Object *freeObjects;
+-	int nFreeObjects;
+-
+-	int nHardLinks;
+-
+-	yaffs_ObjectList *allocatedObjectList;
+-
+-	yaffs_ObjectBucket objectBucket[YAFFS_NOBJECT_BUCKETS];
+-
+-	int nFreeChunks;
+-
+-	int currentDirtyChecker;	/* Used to find current dirtiest block */
+-
+-	__u32 *gcCleanupList;	/* objects to delete at the end of a GC. */
+-	int nonAggressiveSkip;	/* GC state/mode */
+-
+-	/* Statistcs */
+-	int nPageWrites;
+-	int nPageReads;
+-	int nBlockErasures;
+-	int nErasureFailures;
+-	int nGCCopies;
+-	int garbageCollections;
+-	int passiveGarbageCollections;
+-	int nRetriedWrites;
+-	int nRetiredBlocks;
+-	int eccFixed;
+-	int eccUnfixed;
+-	int tagsEccFixed;
+-	int tagsEccUnfixed;
+-	int nDeletions;
+-	int nUnmarkedDeletions;
+-
+-	int hasPendingPrioritisedGCs; /* We think this device might have pending prioritised gcs */
++	int n_erased_blocks;
++	int alloc_block;	/* Current block being allocated off */
++	__u32 alloc_page;
++	int alloc_block_finder;	/* Used to search for next allocation block */
++
++	/* Object and Tnode memory management */
++	void *allocator;
++	int n_obj;
++	int n_tnodes;
++
++	int n_hardlinks;
++
++	yaffs_obj_bucket obj_bucket[YAFFS_NOBJECT_BUCKETS];
++	__u32 bucket_finder;
++
++	int n_free_chunks;
++
++	/* Garbage collection control */
++	__u32 *gc_cleanup_list;	/* objects to delete at the end of a GC. */
++	__u32 n_clean_ups;
++
++	unsigned has_pending_prioritised_gc; /* We think this device might have pending prioritised gcs */
++	unsigned gc_disable;
++	unsigned gc_block_finder;
++	unsigned gc_dirtiest;
++	unsigned gc_pages_in_use;
++	unsigned gc_not_done;
++	unsigned gc_block;
++	unsigned gc_chunk;
++	unsigned gc_skip;
+ 
+ 	/* Special directories */
+-	yaffs_Object *rootDir;
+-	yaffs_Object *lostNFoundDir;
++	yaffs_obj_t *root_dir;
++	yaffs_obj_t *lost_n_found;
+ 
+ 	/* Buffer areas for storing data to recover from write failures TODO
+-	 *      __u8            bufferedData[YAFFS_CHUNKS_PER_BLOCK][YAFFS_BYTES_PER_CHUNK];
+-	 *      yaffs_Spare bufferedSpare[YAFFS_CHUNKS_PER_BLOCK];
++	 *      __u8            buffered_data[YAFFS_CHUNKS_PER_BLOCK][YAFFS_BYTES_PER_CHUNK];
++	 *      yaffs_spare buffered_spare[YAFFS_CHUNKS_PER_BLOCK];
+ 	 */
+ 
+-	int bufferedBlock;	/* Which block is buffered here? */
+-	int doingBufferedBlockRewrite;
+-
+-	yaffs_ChunkCache *srCache;
+-	int srLastUse;
++	int buffered_block;	/* Which block is buffered here? */
++	int doing_buffered_block_rewrite;
+ 
+-	int cacheHits;
++	yaffs_cache_t *cache;
++	int cache_last_use;
+ 
+ 	/* Stuff for background deletion and unlinked files.*/
+-	yaffs_Object *unlinkedDir;	/* Directory where unlinked and deleted files live. */
+-	yaffs_Object *deletedDir;	/* Directory where deleted objects are sent to disappear. */
+-	yaffs_Object *unlinkedDeletion;	/* Current file being background deleted.*/
+-	int nDeletedFiles;		/* Count of files awaiting deletion;*/
+-	int nUnlinkedFiles;		/* Count of unlinked files. */
+-	int nBackgroundDeletions;	/* Count of background deletions. */
+-
++	yaffs_obj_t *unlinked_dir;	/* Directory where unlinked and deleted files live. */
++	yaffs_obj_t *del_dir;	/* Directory where deleted objects are sent to disappear. */
++	yaffs_obj_t *unlinked_deletion;	/* Current file being background deleted.*/
++	int n_deleted_files;		/* Count of files awaiting deletion;*/
++	int n_unlinked_files;		/* Count of unlinked files. */
++	int n_bg_deletions;	/* Count of background deletions. */
+ 
+ 	/* Temporary buffer management */
+-	yaffs_TempBuffer tempBuffer[YAFFS_N_TEMP_BUFFERS];
+-	int maxTemp;
+-	int tempInUse;
+-	int unmanagedTempAllocations;
+-	int unmanagedTempDeallocations;
++	yaffs_buffer_t temp_buffer[YAFFS_N_TEMP_BUFFERS];
++	int max_temp;
++	int temp_in_use;
++	int unmanaged_buffer_allocs;
++	int unmanaged_buffer_deallocs;
+ 
+ 	/* yaffs2 runtime stuff */
+-	unsigned sequenceNumber;	/* Sequence number of currently allocating block */
+-	unsigned oldestDirtySequence;
++	unsigned seq_number;	/* Sequence number of currently allocating block */
++	unsigned oldest_dirty_seq;
++	unsigned oldest_dirty_block;
++
++	/* Block refreshing */
++	int refresh_skip;	/* A skip down counter. Refresh happens when this gets to zero. */
++
++	/* Dirty directory handling */
++	struct ylist_head dirty_dirs; /* List of dirty directories */
++
++
++	/* Statistcs */
++	__u32 n_page_writes;
++	__u32 n_page_reads;
++	__u32 n_erasures;
++	__u32 n_erase_failures;
++	__u32 n_gc_copies;
++	__u32 all_gcs;
++	__u32 passive_gc_count;
++	__u32 oldest_dirty_gc_count;
++	__u32 n_gc_blocks;
++	__u32 bg_gcs;
++	__u32 n_retired_writes;
++	__u32 n_retired_blocks;
++	__u32 n_ecc_fixed;
++	__u32 n_ecc_unfixed;
++	__u32 n_tags_ecc_fixed;
++	__u32 n_tags_ecc_unfixed;
++	__u32 n_deletions;
++	__u32 n_unmarked_deletions;
++	__u32 refresh_count;
++	__u32 cache_hits;
+ 
+ };
+ 
+-typedef struct yaffs_DeviceStruct yaffs_Device;
++typedef struct yaffs_dev_s yaffs_dev_t;
+ 
+ /* The static layout of block usage etc is stored in the super block header */
+ typedef struct {
+ 	int StructType;
+ 	int version;
+-	int checkpointStartBlock;
+-	int checkpointEndBlock;
+-	int startBlock;
+-	int endBlock;
++	int checkpt_start_block;
++	int checkpt_end_block;
++	int start_block;
++	int end_block;
+ 	int rfu[100];
+-} yaffs_SuperBlockHeader;
++} yaffs_sb_header;
+ 
+ /* The CheckpointDevice structure holds the device information that changes at runtime and
+  * must be preserved over unmount/mount cycles.
+  */
+ typedef struct {
+-	int structType;
+-	int nErasedBlocks;
+-	int allocationBlock;	/* Current block being allocated off */
+-	__u32 allocationPage;
+-	int nFreeChunks;
+-
+-	int nDeletedFiles;		/* Count of files awaiting deletion;*/
+-	int nUnlinkedFiles;		/* Count of unlinked files. */
+-	int nBackgroundDeletions;	/* Count of background deletions. */
++	int struct_type;
++	int n_erased_blocks;
++	int alloc_block;	/* Current block being allocated off */
++	__u32 alloc_page;
++	int n_free_chunks;
++
++	int n_deleted_files;		/* Count of files awaiting deletion;*/
++	int n_unlinked_files;		/* Count of unlinked files. */
++	int n_bg_deletions;	/* Count of background deletions. */
+ 
+ 	/* yaffs2 runtime stuff */
+-	unsigned sequenceNumber;	/* Sequence number of currently allocating block */
+-	unsigned oldestDirtySequence;
++	unsigned seq_number;	/* Sequence number of currently allocating block */
+ 
+-} yaffs_CheckpointDevice;
++} yaffs_checkpt_dev_t;
+ 
+ 
+ typedef struct {
+-	int structType;
++	int struct_type;
+ 	__u32 magic;
+ 	__u32 version;
+ 	__u32 head;
+-} yaffs_CheckpointValidity;
++} yaffs_checkpt_validty_t;
++
++
++struct yaffs_shadow_fixer_s {
++	int obj_id;
++	int shadowed_id;
++	struct yaffs_shadow_fixer_s *next;
++};
++
++/* Structure for doing xattr modifications */
++typedef struct {
++	int set; /* If 0 then this is a deletion */
++	const YCHAR *name;
++	const void *data;
++	int size;
++	int flags;
++	int result;
++}yaffs_xattr_mod;
+ 
+ 
+ /*----------------------- YAFFS Functions -----------------------*/
+ 
+-int yaffs_GutsInitialise(yaffs_Device *dev);
+-void yaffs_Deinitialise(yaffs_Device *dev);
++int yaffs_guts_initialise(yaffs_dev_t *dev);
++void yaffs_deinitialise(yaffs_dev_t *dev);
+ 
+-int yaffs_GetNumberOfFreeChunks(yaffs_Device *dev);
++int yaffs_get_n_free_chunks(yaffs_dev_t *dev);
+ 
+-int yaffs_RenameObject(yaffs_Object *oldDir, const YCHAR *oldName,
+-		       yaffs_Object *newDir, const YCHAR *newName);
++int yaffs_rename_obj(yaffs_obj_t *old_dir, const YCHAR *old_name,
++		       yaffs_obj_t *new_dir, const YCHAR *new_name);
+ 
+-int yaffs_Unlink(yaffs_Object *dir, const YCHAR *name);
+-int yaffs_DeleteObject(yaffs_Object *obj);
++int yaffs_unlinker(yaffs_obj_t *dir, const YCHAR *name);
++int yaffs_del_obj(yaffs_obj_t *obj);
+ 
+-int yaffs_GetObjectName(yaffs_Object *obj, YCHAR *name, int buffSize);
+-int yaffs_GetObjectFileLength(yaffs_Object *obj);
+-int yaffs_GetObjectInode(yaffs_Object *obj);
+-unsigned yaffs_GetObjectType(yaffs_Object *obj);
+-int yaffs_GetObjectLinkCount(yaffs_Object *obj);
++int yaffs_get_obj_name(yaffs_obj_t *obj, YCHAR *name, int buffer_size);
++int yaffs_get_obj_length(yaffs_obj_t *obj);
++int yaffs_get_obj_inode(yaffs_obj_t *obj);
++unsigned yaffs_get_obj_type(yaffs_obj_t *obj);
++int yaffs_get_obj_link_count(yaffs_obj_t *obj);
+ 
+-int yaffs_SetAttributes(yaffs_Object *obj, struct iattr *attr);
+-int yaffs_GetAttributes(yaffs_Object *obj, struct iattr *attr);
++int yaffs_set_attribs(yaffs_obj_t *obj, struct iattr *attr);
++int yaffs_get_attribs(yaffs_obj_t *obj, struct iattr *attr);
+ 
+ /* File operations */
+-int yaffs_ReadDataFromFile(yaffs_Object *obj, __u8 *buffer, loff_t offset,
+-				int nBytes);
+-int yaffs_WriteDataToFile(yaffs_Object *obj, const __u8 *buffer, loff_t offset,
+-				int nBytes, int writeThrough);
+-int yaffs_ResizeFile(yaffs_Object *obj, loff_t newSize);
++int yaffs_file_rd(yaffs_obj_t *obj, __u8 *buffer, loff_t offset,
++				int n_bytes);
++int yaffs_wr_file(yaffs_obj_t *obj, const __u8 *buffer, loff_t offset,
++				int n_bytes, int write_trhrough);
++int yaffs_resize_file(yaffs_obj_t *obj, loff_t new_size);
+ 
+-yaffs_Object *yaffs_MknodFile(yaffs_Object *parent, const YCHAR *name,
++yaffs_obj_t *yaffs_create_file(yaffs_obj_t *parent, const YCHAR *name,
+ 				__u32 mode, __u32 uid, __u32 gid);
+-int yaffs_FlushFile(yaffs_Object *obj, int updateTime);
++
++int yaffs_flush_file(yaffs_obj_t *obj, int update_time, int data_sync);
+ 
+ /* Flushing and checkpointing */
+-void yaffs_FlushEntireDeviceCache(yaffs_Device *dev);
++void yaffs_flush_whole_cache(yaffs_dev_t *dev);
+ 
+-int yaffs_CheckpointSave(yaffs_Device *dev);
+-int yaffs_CheckpointRestore(yaffs_Device *dev);
++int yaffs_checkpoint_save(yaffs_dev_t *dev);
++int yaffs_checkpoint_restore(yaffs_dev_t *dev);
+ 
+ /* Directory operations */
+-yaffs_Object *yaffs_MknodDirectory(yaffs_Object *parent, const YCHAR *name,
++yaffs_obj_t *yaffs_create_dir(yaffs_obj_t *parent, const YCHAR *name,
+ 				__u32 mode, __u32 uid, __u32 gid);
+-yaffs_Object *yaffs_FindObjectByName(yaffs_Object *theDir, const YCHAR *name);
+-int yaffs_ApplyToDirectoryChildren(yaffs_Object *theDir,
+-				   int (*fn) (yaffs_Object *));
++yaffs_obj_t *yaffs_find_by_name(yaffs_obj_t *the_dir, const YCHAR *name);
++int yaffs_ApplyToDirectoryChildren(yaffs_obj_t *the_dir,
++				   int (*fn) (yaffs_obj_t *));
+ 
+-yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device *dev, __u32 number);
++yaffs_obj_t *yaffs_find_by_number(yaffs_dev_t *dev, __u32 number);
+ 
+ /* Link operations */
+-yaffs_Object *yaffs_Link(yaffs_Object *parent, const YCHAR *name,
+-			 yaffs_Object *equivalentObject);
++yaffs_obj_t *yaffs_link_obj(yaffs_obj_t *parent, const YCHAR *name,
++			 yaffs_obj_t *equiv_obj);
+ 
+-yaffs_Object *yaffs_GetEquivalentObject(yaffs_Object *obj);
++yaffs_obj_t *yaffs_get_equivalent_obj(yaffs_obj_t *obj);
+ 
+ /* Symlink operations */
+-yaffs_Object *yaffs_MknodSymLink(yaffs_Object *parent, const YCHAR *name,
++yaffs_obj_t *yaffs_create_symlink(yaffs_obj_t *parent, const YCHAR *name,
+ 				 __u32 mode, __u32 uid, __u32 gid,
+ 				 const YCHAR *alias);
+-YCHAR *yaffs_GetSymlinkAlias(yaffs_Object *obj);
++YCHAR *yaffs_get_symlink_alias(yaffs_obj_t *obj);
+ 
+ /* Special inodes (fifos, sockets and devices) */
+-yaffs_Object *yaffs_MknodSpecial(yaffs_Object *parent, const YCHAR *name,
++yaffs_obj_t *yaffs_create_special(yaffs_obj_t *parent, const YCHAR *name,
+ 				 __u32 mode, __u32 uid, __u32 gid, __u32 rdev);
+ 
++
++int yaffs_set_xattrib(yaffs_obj_t *obj, const YCHAR *name, const void * value, int size, int flags);
++int yaffs_get_xattrib(yaffs_obj_t *obj, const YCHAR *name, void *value, int size);
++int yaffs_list_xattrib(yaffs_obj_t *obj, char *buffer, int size);
++int yaffs_remove_xattrib(yaffs_obj_t *obj, const YCHAR *name);
++
+ /* Special directories */
+-yaffs_Object *yaffs_Root(yaffs_Device *dev);
+-yaffs_Object *yaffs_LostNFound(yaffs_Device *dev);
++yaffs_obj_t *yaffs_root(yaffs_dev_t *dev);
++yaffs_obj_t *yaffs_lost_n_found(yaffs_dev_t *dev);
+ 
+ #ifdef CONFIG_YAFFS_WINCE
+ /* CONFIG_YAFFS_WINCE special stuff */
+-void yfsd_WinFileTimeNow(__u32 target[2]);
++void yfsd_win_file_time_now(__u32 target[2]);
+ #endif
+ 
+-#ifdef __KERNEL__
++void yaffs_handle_defered_free(yaffs_obj_t *obj);
+ 
+-void yaffs_HandleDeferedFree(yaffs_Object *obj);
+-#endif
++void yaffs_update_dirty_dirs(yaffs_dev_t *dev);
++
++int yaffs_bg_gc(yaffs_dev_t *dev, unsigned urgency);
+ 
+ /* Debug dump  */
+-int yaffs_DumpObject(yaffs_Object *obj);
++int yaffs_dump_obj(yaffs_obj_t *obj);
+ 
+-void yaffs_GutsTest(yaffs_Device *dev);
++void yaffs_guts_test(yaffs_dev_t *dev);
+ 
+-/* A few useful functions */
+-void yaffs_InitialiseTags(yaffs_ExtendedTags *tags);
+-void yaffs_DeleteChunk(yaffs_Device *dev, int chunkId, int markNAND, int lyn);
+-int yaffs_CheckFF(__u8 *buffer, int nBytes);
+-void yaffs_HandleChunkError(yaffs_Device *dev, yaffs_BlockInfo *bi);
++/* A few useful functions to be used within the core files*/
++void yaffs_chunk_del(yaffs_dev_t *dev, int chunk_id, int mark_flash, int lyn);
++int yaffs_check_ff(__u8 *buffer, int n_bytes);
++void yaffs_handle_chunk_error(yaffs_dev_t *dev, yaffs_block_info_t *bi);
++
++__u8 *yaffs_get_temp_buffer(yaffs_dev_t *dev, int line_no);
++void yaffs_release_temp_buffer(yaffs_dev_t *dev, __u8 *buffer, int line_no);
++
++yaffs_obj_t *yaffs_find_or_create_by_number(yaffs_dev_t *dev,
++					        int number,
++					        yaffs_obj_type type);
++int yaffs_put_chunk_in_file(yaffs_obj_t *in, int inode_chunk,
++			        int nand_chunk, int in_scan);
++void yaffs_set_obj_name(yaffs_obj_t *obj, const YCHAR *name);
++void yaffs_set_obj_name_from_oh(yaffs_obj_t *obj, const yaffs_obj_header *oh);
++void yaffs_add_obj_to_dir(yaffs_obj_t *directory,
++					yaffs_obj_t *obj);
++YCHAR *yaffs_clone_str(const YCHAR *str);
++void yaffs_link_fixup(yaffs_dev_t *dev, yaffs_obj_t *hard_list);
++void yaffs_block_became_dirty(yaffs_dev_t *dev, int block_no);
++int yaffs_update_oh(yaffs_obj_t *in, const YCHAR *name,
++				int force, int is_shrink, int shadows,
++                                yaffs_xattr_mod *xop);
++void yaffs_handle_shadowed_obj(yaffs_dev_t *dev, int obj_id,
++				int backward_scanning);
++int yaffs_check_alloc_available(yaffs_dev_t *dev, int n_chunks);
++yaffs_tnode_t *yaffs_get_tnode(yaffs_dev_t *dev);
++yaffs_tnode_t *yaffs_add_find_tnode_0(yaffs_dev_t *dev,
++					yaffs_file_s *file_struct,
++					__u32 chunk_id,
++					yaffs_tnode_t *passed_tn);
++
++int yaffs_do_file_wr(yaffs_obj_t *in, const __u8 *buffer, loff_t offset,
++			int n_bytes, int write_trhrough);
++void yaffs_resize_file_down( yaffs_obj_t *obj, loff_t new_size);
++void yaffs_skip_rest_of_block(yaffs_dev_t *dev);
++
++int yaffs_count_free_chunks(yaffs_dev_t *dev);
++
++yaffs_tnode_t *yaffs_find_tnode_0(yaffs_dev_t *dev,
++				yaffs_file_s *file_struct,
++				__u32 chunk_id);
+ 
+-__u8 *yaffs_GetTempBuffer(yaffs_Device *dev, int lineNo);
+-void yaffs_ReleaseTempBuffer(yaffs_Device *dev, __u8 *buffer, int lineNo);
++__u32 yaffs_get_group_base(yaffs_dev_t *dev, yaffs_tnode_t *tn, unsigned pos);
+ 
+ #endif
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffsinterface.h linux-2.6.36-rc8.new/fs/yaffs2/yaffsinterface.h
+--- linux-2.6.36-rc8/fs/yaffs2/yaffsinterface.h	2010-10-20 13:17:58.955000294 +0300
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffsinterface.h	2010-10-20 13:28:16.061000294 +0300
+@@ -1,7 +1,7 @@
+ /*
+  * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+  *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+  *   for Toby Churchill Ltd and Brightstar Engineering
+  *
+  * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -16,6 +16,6 @@
+ #ifndef __YAFFSINTERFACE_H__
+ #define __YAFFSINTERFACE_H__
+ 
+-int yaffs_Initialise(unsigned nBlocks);
++int yaffs_initialise(unsigned nBlocks);
+ 
+ #endif
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffs_linux_allocator.c linux-2.6.36-rc8.new/fs/yaffs2/yaffs_linux_allocator.c
+--- linux-2.6.36-rc8/fs/yaffs2/yaffs_linux_allocator.c	1970-01-01 02:00:00.000000000 +0200
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffs_linux_allocator.c	2010-10-20 13:28:16.028000294 +0300
+@@ -0,0 +1,200 @@
++/*
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2010 Aleph One Ltd.
++ *   for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ *
++ * Note: Tis code is currently unused. Being checked in in case it becomes useful.
++ */
++
++
++#include "yaffs_allocator.h"
++#include "yaffs_guts.h"
++#include "yaffs_trace.h"
++#include "yportenv.h"
++#include "yaffs_linux.h"
++/*
++ * Start out with the same allocator as yaffs direct.
++ * Todo: Change to Linux slab allocator.
++ */
++
++
++
++#define NAMELEN  20
++struct yaffs_AllocatorStruct {
++	char tnode_name[NAMELEN+1];
++	char object_name[NAMELEN+1];
++	struct kmem_cache *tnode_cache;
++	struct kmem_cache *object_cache;
++};
++
++typedef struct yaffs_AllocatorStruct yaffs_Allocator;
++
++int mount_id;
++
++void yaffs_deinit_raw_tnodes_and_objs(yaffs_dev_t *dev)
++{
++	yaffs_Allocator *allocator = (yaffs_Allocator *)dev->allocator;
++
++	T(YAFFS_TRACE_ALLOCATE,(TSTR("Deinitialising yaffs allocator\n")));
++
++	if(allocator){
++		if(allocator->tnode_cache){
++			kmem_cache_destroy(allocator->tnode_cache);
++			allocator->tnode_cache = NULL;
++		} else {
++			T(YAFFS_TRACE_ALWAYS,
++				(TSTR("NULL tnode cache\n")));
++			YBUG();
++		}
++
++		if(allocator->object_cache){
++			kmem_cache_destroy(allocator->object_cache);
++			allocator->object_cache = NULL;
++		} else {
++			T(YAFFS_TRACE_ALWAYS,
++				(TSTR("NULL object cache\n")));
++			YBUG();
++		}
++
++		YFREE(allocator);
++
++	} else {
++		T(YAFFS_TRACE_ALWAYS,
++			(TSTR("Deinitialising NULL allocator\n")));
++		YBUG();
++	}
++	dev->allocator = NULL;
++}
++
++
++static void fake_ctor0(void *data){data = data;}
++static void fake_ctor1(void *data){data = data;}
++static void fake_ctor2(void *data){data = data;}
++static void fake_ctor3(void *data){data = data;}
++static void fake_ctor4(void *data){data = data;}
++static void fake_ctor5(void *data){data = data;}
++static void fake_ctor6(void *data){data = data;}
++static void fake_ctor7(void *data){data = data;}
++static void fake_ctor8(void *data){data = data;}
++static void fake_ctor9(void *data){data = data;}
++
++static void (*fake_ctor_list[10]) (void *) = {
++	fake_ctor0,
++	fake_ctor1,
++	fake_ctor2,
++	fake_ctor3,
++	fake_ctor4,
++	fake_ctor5,
++	fake_ctor6,
++	fake_ctor7,
++	fake_ctor8,
++	fake_ctor9,
++};
++
++void yaffs_init_raw_tnodes_and_objs(yaffs_dev_t *dev)
++{
++	yaffs_Allocator *allocator;
++	unsigned mount_id = yaffs_dev_to_lc(dev)->mount_id;
++
++	T(YAFFS_TRACE_ALLOCATE,(TSTR("Initialising yaffs allocator\n")));
++
++	if(dev->allocator)
++		YBUG();
++	else if(mount_id >= 10){
++		T(YAFFS_TRACE_ALWAYS,(TSTR("Bad mount_id %u\n"),mount_id));
++	} else {
++		 allocator = YMALLOC(sizeof(yaffs_Allocator));
++		 memset(allocator,0,sizeof(yaffs_Allocator));
++		 dev->allocator = allocator;
++
++		if(!dev->allocator){
++			T(YAFFS_TRACE_ALWAYS,
++				(TSTR("yaffs allocator creation failed\n")));
++			YBUG();
++			return;
++
++		}
++
++		sprintf(allocator->tnode_name,"yaffs_t_%u",mount_id);
++		sprintf(allocator->object_name,"yaffs_o_%u",mount_id);
++
++		allocator->tnode_cache =
++			kmem_cache_create(allocator->tnode_name,
++				dev->tnode_size,
++				0, 0,
++				fake_ctor_list[mount_id]);
++		if(allocator->tnode_cache)
++			T(YAFFS_TRACE_ALLOCATE,
++				(TSTR("tnode cache \"%s\" %p\n"),
++				allocator->tnode_name,allocator->tnode_cache));
++		else {
++			T(YAFFS_TRACE_ALWAYS,
++				(TSTR("yaffs cache creation failed\n")));
++			YBUG();
++		}
++
++
++		allocator->object_cache = 
++			kmem_cache_create(allocator->object_name,
++				sizeof(yaffs_obj_t),
++				0, 0,
++				fake_ctor_list[mount_id]);
++
++		if(allocator->object_cache)
++			T(YAFFS_TRACE_ALLOCATE,
++				(TSTR("object cache \"%s\" %p\n"),
++				allocator->object_name,allocator->object_cache));
++
++		else {
++			T(YAFFS_TRACE_ALWAYS,
++				(TSTR("yaffs cache creation failed\n")));
++			YBUG();
++		}
++	} 
++}
++
++
++yaffs_tnode_t *yaffs_alloc_raw_tnode(yaffs_dev_t *dev)
++{
++	yaffs_Allocator *allocator = dev->allocator;
++	if(!allocator || !allocator->tnode_cache){
++		YBUG();
++		return NULL;
++	}
++	return kmem_cache_alloc(allocator->tnode_cache, GFP_NOFS);
++}
++
++void yaffs_free_raw_tnode(yaffs_dev_t *dev, yaffs_tnode_t *tn)
++{
++	yaffs_Allocator *allocator = dev->allocator;
++	kmem_cache_free(allocator->tnode_cache,tn);
++}
++
++yaffs_obj_t *yaffs_alloc_raw_obj(yaffs_dev_t *dev)
++{
++	yaffs_Allocator *allocator = dev->allocator;
++	if(!allocator){
++		YBUG();
++		return NULL;
++	}
++	if(!allocator->object_cache){
++		YBUG();
++		return NULL;
++	}
++	return kmem_cache_alloc(allocator->object_cache, GFP_NOFS);
++}
++
++void yaffs_free_raw_obj(yaffs_dev_t *dev, yaffs_obj_t *obj)
++{
++	yaffs_Allocator *allocator = dev->allocator;
++	kmem_cache_free(allocator->object_cache,obj);
++}
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffs_linux.h linux-2.6.36-rc8.new/fs/yaffs2/yaffs_linux.h
+--- linux-2.6.36-rc8/fs/yaffs2/yaffs_linux.h	1970-01-01 02:00:00.000000000 +0200
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffs_linux.h	2010-10-20 13:28:16.061000294 +0300
+@@ -0,0 +1,43 @@
++/*
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2010 Aleph One Ltd.
++ *   for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ */
++
++#ifndef __YAFFS_LINUX_H__
++#define __YAFFS_LINUX_H__
++
++#include "devextras.h"
++#include "yportenv.h"
++
++struct yaffs_LinuxContext {
++	struct ylist_head	contextList; /* List of these we have mounted */
++	struct yaffs_dev_s *dev;
++	struct super_block * superBlock;
++	struct task_struct *bgThread; /* Background thread for this device */
++	int bgRunning;
++        struct semaphore grossLock;     /* Gross locking semaphore */
++	__u8 *spareBuffer;      /* For mtdif2 use. Don't know the size of the buffer
++				 * at compile time so we have to allocate it.
++				 */
++	struct ylist_head searchContexts;
++	void (*putSuperFunc)(struct super_block *sb);
++
++	struct task_struct *readdirProcess;
++	unsigned mount_id;
++};
++
++#define yaffs_dev_to_lc(dev) ((struct yaffs_LinuxContext *)((dev)->os_context))
++#define yaffs_dev_to_mtd(dev) ((struct mtd_info *)((dev)->driver_context))
++
++#endif
++
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffs_list.h linux-2.6.36-rc8.new/fs/yaffs2/yaffs_list.h
+--- linux-2.6.36-rc8/fs/yaffs2/yaffs_list.h	1970-01-01 02:00:00.000000000 +0200
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffs_list.h	2010-10-20 13:28:16.062000294 +0300
+@@ -0,0 +1,127 @@
++/*
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2010 Aleph One Ltd.
++ *   for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ */
++
++/*
++ * This file is just holds extra declarations of macros that would normally
++ * be providesd in the Linux kernel. These macros have been written from
++ * scratch but are functionally equivalent to the Linux ones.
++ *
++ */
++
++#ifndef __YAFFS_LIST_H__
++#define __YAFFS_LIST_H__
++
++
++#include "yportenv.h"
++
++/*
++ * This is a simple doubly linked list implementation that matches the
++ * way the Linux kernel doubly linked list implementation works.
++ */
++
++struct ylist_head {
++	struct ylist_head *next; /* next in chain */
++	struct ylist_head *prev; /* previous in chain */
++};
++
++
++/* Initialise a static list */
++#define YLIST_HEAD(name) \
++struct ylist_head name = { &(name), &(name)}
++
++
++
++/* Initialise a list head to an empty list */
++#define YINIT_LIST_HEAD(p) \
++do { \
++	(p)->next = (p);\
++	(p)->prev = (p); \
++} while (0)
++
++
++/* Add an element to a list */
++static Y_INLINE void ylist_add(struct ylist_head *newEntry,
++				struct ylist_head *list)
++{
++	struct ylist_head *listNext = list->next;
++
++	list->next = newEntry;
++	newEntry->prev = list;
++	newEntry->next = listNext;
++	listNext->prev = newEntry;
++
++}
++
++static Y_INLINE void ylist_add_tail(struct ylist_head *newEntry,
++				 struct ylist_head *list)
++{
++	struct ylist_head *listPrev = list->prev;
++
++	list->prev = newEntry;
++	newEntry->next = list;
++	newEntry->prev = listPrev;
++	listPrev->next = newEntry;
++
++}
++
++
++/* Take an element out of its current list, with or without
++ * reinitialising the links.of the entry*/
++static Y_INLINE void ylist_del(struct ylist_head *entry)
++{
++	struct ylist_head *listNext = entry->next;
++	struct ylist_head *listPrev = entry->prev;
++
++	listNext->prev = listPrev;
++	listPrev->next = listNext;
++
++}
++
++static Y_INLINE void ylist_del_init(struct ylist_head *entry)
++{
++	ylist_del(entry);
++	entry->next = entry->prev = entry;
++}
++
++
++/* Test if the list is empty */
++static Y_INLINE int ylist_empty(struct ylist_head *entry)
++{
++	return (entry->next == entry);
++}
++
++
++/* ylist_entry takes a pointer to a list entry and offsets it to that
++ * we can find a pointer to the object it is embedded in.
++ */
++
++
++#define ylist_entry(entry, type, member) \
++	((type *)((char *)(entry)-(unsigned long)(&((type *)NULL)->member)))
++
++
++/* ylist_for_each and list_for_each_safe  iterate over lists.
++ * ylist_for_each_safe uses temporary storage to make the list delete safe
++ */
++
++#define ylist_for_each(itervar, list) \
++	for (itervar = (list)->next; itervar != (list); itervar = itervar->next)
++
++#define ylist_for_each_safe(itervar, saveVar, list) \
++	for (itervar = (list)->next, saveVar = (list)->next->next; \
++		itervar != (list); itervar = saveVar, saveVar = saveVar->next)
++
++
++#endif
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffs_mtdif1.c linux-2.6.36-rc8.new/fs/yaffs2/yaffs_mtdif1.c
+--- linux-2.6.36-rc8/fs/yaffs2/yaffs_mtdif1.c	2010-10-20 13:17:58.956000294 +0300
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffs_mtdif1.c	2010-10-20 13:28:16.028000294 +0300
+@@ -2,7 +2,7 @@
+  * YAFFS: Yet another FFS. A NAND-flash specific file system.
+  * yaffs_mtdif1.c  NAND mtd interface functions for small-page NAND.
+  *
+- * Copyright (C) 2002 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+  *   for Toby Churchill Ltd and Brightstar Engineering
+  *
+  * This program is free software; you can redistribute it and/or modify
+@@ -18,15 +18,17 @@
+  *
+  * These functions are invoked via function pointers in yaffs_nand.c.
+  * This replaces functionality provided by functions in yaffs_mtdif.c
+- * and the yaffs_TagsCompatability functions in yaffs_tagscompat.c that are
++ * and the yaffs_tags_tCompatability functions in yaffs_tagscompat.c that are
+  * called in yaffs_mtdif.c when the function pointers are NULL.
+- * We assume the MTD layer is performing ECC (useNANDECC is true).
++ * We assume the MTD layer is performing ECC (use_nand_ecc is true).
+  */
+ 
+ #include "yportenv.h"
++#include "yaffs_trace.h"
+ #include "yaffs_guts.h"
+ #include "yaffs_packedtags1.h"
+-#include "yaffs_tagscompat.h"	/* for yaffs_CalcTagsECC */
++#include "yaffs_tagscompat.h"	/* for yaffs_calc_tags_ecc */
++#include "yaffs_linux.h"
+ 
+ #include "linux/kernel.h"
+ #include "linux/version.h"
+@@ -36,8 +38,6 @@
+ /* Don't compile this module if we don't have MTD's mtd_oob_ops interface */
+ #if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
+ 
+-const char *yaffs_mtdif1_c_version = "$Id: yaffs_mtdif1.c,v 1.10 2009-03-09 07:41:10 charles Exp $";
+-
+ #ifndef CONFIG_YAFFS_9BYTE_TAGS
+ # define YTAG1_SIZE 8
+ #else
+@@ -51,12 +51,12 @@ const char *yaffs_mtdif1_c_version = "$I
+  * adjust 'oobfree' to match your existing Yaffs data.
+  *
+  * This nand_ecclayout scatters/gathers to/from the old-yaffs layout with the
+- * pageStatus byte (at NAND spare offset 4) scattered/gathered from/to
++ * page_status byte (at NAND spare offset 4) scattered/gathered from/to
+  * the 9th byte.
+  *
+  * Old-style on-NAND format: T0,T1,T2,T3,P,B,T4,T5,E0,E1,E2,T6,T7,E3,E4,E5
+- * We have/need PackedTags1 plus pageStatus: T0,T1,T2,T3,T4,T5,T6,T7,P
+- * where Tn are the tag bytes, En are MTD's ECC bytes, P is the pageStatus
++ * We have/need PackedTags1 plus page_status: T0,T1,T2,T3,T4,T5,T6,T7,P
++ * where Tn are the tag bytes, En are MTD's ECC bytes, P is the page_status
+  * byte and B is the small-page bad-block indicator byte.
+  */
+ static struct nand_ecclayout nand_oob_16 = {
+@@ -88,42 +88,40 @@ static struct nand_ecclayout nand_oob_16
+  * Any underlying MTD error results in YAFFS_FAIL.
+  * Returns YAFFS_OK or YAFFS_FAIL.
+  */
+-int nandmtd1_WriteChunkWithTagsToNAND(yaffs_Device *dev,
+-	int chunkInNAND, const __u8 *data, const yaffs_ExtendedTags *etags)
++int nandmtd1_WriteChunkWithTagsToNAND(yaffs_dev_t *dev,
++	int nand_chunk, const __u8 *data, const yaffs_ext_tags *etags)
+ {
+-	struct mtd_info *mtd = dev->genericDevice;
+-	int chunkBytes = dev->nDataBytesPerChunk;
+-	loff_t addr = ((loff_t)chunkInNAND) * chunkBytes;
++	struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
++	int chunkBytes = dev->data_bytes_per_chunk;
++	loff_t addr = ((loff_t)nand_chunk) * chunkBytes;
+ 	struct mtd_oob_ops ops;
+ 	yaffs_PackedTags1 pt1;
+ 	int retval;
+ 
+-	/* we assume that PackedTags1 and yaffs_Tags are compatible */
++	/* we assume that PackedTags1 and yaffs_tags_t are compatible */
+ 	compile_time_assertion(sizeof(yaffs_PackedTags1) == 12);
+-	compile_time_assertion(sizeof(yaffs_Tags) == 8);
+-
+-	dev->nPageWrites++;
++	compile_time_assertion(sizeof(yaffs_tags_t) == 8);
+ 
+ 	yaffs_PackTags1(&pt1, etags);
+-	yaffs_CalcTagsECC((yaffs_Tags *)&pt1);
++	yaffs_calc_tags_ecc((yaffs_tags_t *)&pt1);
+ 
+ 	/* When deleting a chunk, the upper layer provides only skeletal
+-	 * etags, one with chunkDeleted set.  However, we need to update the
++	 * etags, one with is_deleted set.  However, we need to update the
+ 	 * tags, not erase them completely.  So we use the NAND write property
+ 	 * that only zeroed-bits stick and set tag bytes to all-ones and
+ 	 * zero just the (not) deleted bit.
+ 	 */
+ #ifndef CONFIG_YAFFS_9BYTE_TAGS
+-	if (etags->chunkDeleted) {
++	if (etags->is_deleted) {
+ 		memset(&pt1, 0xff, 8);
+ 		/* clear delete status bit to indicate deleted */
+ 		pt1.deleted = 0;
+ 	}
+ #else
+ 	((__u8 *)&pt1)[8] = 0xff;
+-	if (etags->chunkDeleted) {
++	if (etags->is_deleted) {
+ 		memset(&pt1, 0xff, 8);
+-		/* zero pageStatus byte to indicate deleted */
++		/* zero page_status byte to indicate deleted */
+ 		((__u8 *)&pt1)[8] = 0;
+ 	}
+ #endif
+@@ -137,20 +135,20 @@ int nandmtd1_WriteChunkWithTagsToNAND(ya
+ 
+ 	retval = mtd->write_oob(mtd, addr, &ops);
+ 	if (retval) {
+-		yaffs_trace(YAFFS_TRACE_MTD,
+-			"write_oob failed, chunk %d, mtd error %d\n",
+-			chunkInNAND, retval);
++		T(YAFFS_TRACE_MTD,
++			(TSTR("write_oob failed, chunk %d, mtd error %d"TENDSTR),
++			nand_chunk, retval));
+ 	}
+ 	return retval ? YAFFS_FAIL : YAFFS_OK;
+ }
+ 
+-/* Return with empty ExtendedTags but add eccResult.
++/* Return with empty ExtendedTags but add ecc_result.
+  */
+-static int rettags(yaffs_ExtendedTags *etags, int eccResult, int retval)
++static int rettags(yaffs_ext_tags *etags, int ecc_result, int retval)
+ {
+ 	if (etags) {
+ 		memset(etags, 0, sizeof(*etags));
+-		etags->eccResult = eccResult;
++		etags->ecc_result = ecc_result;
+ 	}
+ 	return retval;
+ }
+@@ -158,30 +156,28 @@ static int rettags(yaffs_ExtendedTags *e
+ /* Read a chunk (page) from NAND.
+  *
+  * Caller expects ExtendedTags data to be usable even on error; that is,
+- * all members except eccResult and blockBad are zeroed.
++ * all members except ecc_result and block_bad are zeroed.
+  *
+  *  - Check ECC results for data (if applicable)
+  *  - Check for blank/erased block (return empty ExtendedTags if blank)
+  *  - Check the PackedTags1 mini-ECC (correct if necessary/possible)
+  *  - Convert PackedTags1 to ExtendedTags
+- *  - Update eccResult and blockBad members to refect state.
++ *  - Update ecc_result and block_bad members to refect state.
+  *
+  * Returns YAFFS_OK or YAFFS_FAIL.
+  */
+-int nandmtd1_ReadChunkWithTagsFromNAND(yaffs_Device *dev,
+-	int chunkInNAND, __u8 *data, yaffs_ExtendedTags *etags)
++int nandmtd1_ReadChunkWithTagsFromNAND(yaffs_dev_t *dev,
++	int nand_chunk, __u8 *data, yaffs_ext_tags *etags)
+ {
+-	struct mtd_info *mtd = dev->genericDevice;
+-	int chunkBytes = dev->nDataBytesPerChunk;
+-	loff_t addr = ((loff_t)chunkInNAND) * chunkBytes;
++	struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
++	int chunkBytes = dev->data_bytes_per_chunk;
++	loff_t addr = ((loff_t)nand_chunk) * chunkBytes;
+ 	int eccres = YAFFS_ECC_RESULT_NO_ERROR;
+ 	struct mtd_oob_ops ops;
+ 	yaffs_PackedTags1 pt1;
+ 	int retval;
+ 	int deleted;
+ 
+-	dev->nPageReads++;
+-
+ 	memset(&ops, 0, sizeof(ops));
+ 	ops.mode = MTD_OOB_AUTO;
+ 	ops.len = (data) ? chunkBytes : 0;
+@@ -200,9 +196,9 @@ int nandmtd1_ReadChunkWithTagsFromNAND(y
+ 	 */
+ 	retval = mtd->read_oob(mtd, addr, &ops);
+ 	if (retval) {
+-		yaffs_trace(YAFFS_TRACE_MTD,
+-			"read_oob failed, chunk %d, mtd error %d\n",
+-			chunkInNAND, retval);
++		T(YAFFS_TRACE_MTD,
++			(TSTR("read_oob failed, chunk %d, mtd error %d"TENDSTR),
++			nand_chunk, retval));
+ 	}
+ 
+ 	switch (retval) {
+@@ -213,23 +209,23 @@ int nandmtd1_ReadChunkWithTagsFromNAND(y
+ 	case -EUCLEAN:
+ 		/* MTD's ECC fixed the data */
+ 		eccres = YAFFS_ECC_RESULT_FIXED;
+-		dev->eccFixed++;
++		dev->n_ecc_fixed++;
+ 		break;
+ 
+ 	case -EBADMSG:
+ 		/* MTD's ECC could not fix the data */
+-		dev->eccUnfixed++;
++		dev->n_ecc_unfixed++;
+ 		/* fall into... */
+ 	default:
+ 		rettags(etags, YAFFS_ECC_RESULT_UNFIXED, 0);
+-		etags->blockBad = (mtd->block_isbad)(mtd, addr);
++		etags->block_bad = (mtd->block_isbad)(mtd, addr);
+ 		return YAFFS_FAIL;
+ 	}
+ 
+ 	/* Check for a blank/erased chunk.
+ 	 */
+-	if (yaffs_CheckFF((__u8 *)&pt1, 8)) {
+-		/* when blank, upper layers want eccResult to be <= NO_ERROR */
++	if (yaffs_check_ff((__u8 *)&pt1, 8)) {
++		/* when blank, upper layers want ecc_result to be <= NO_ERROR */
+ 		return rettags(etags, YAFFS_ECC_RESULT_NO_ERROR, YAFFS_OK);
+ 	}
+ 
+@@ -241,37 +237,37 @@ int nandmtd1_ReadChunkWithTagsFromNAND(y
+ 	deleted = !pt1.deleted;
+ 	pt1.deleted = 1;
+ #else
+-	deleted = (yaffs_CountBits(((__u8 *)&pt1)[8]) < 7);
++	deleted = (yaffs_count_bits(((__u8 *)&pt1)[8]) < 7);
+ #endif
+ 
+ 	/* Check the packed tags mini-ECC and correct if necessary/possible.
+ 	 */
+-	retval = yaffs_CheckECCOnTags((yaffs_Tags *)&pt1);
++	retval = yaffs_check_tags_ecc((yaffs_tags_t *)&pt1);
+ 	switch (retval) {
+ 	case 0:
+ 		/* no tags error, use MTD result */
+ 		break;
+ 	case 1:
+ 		/* recovered tags-ECC error */
+-		dev->tagsEccFixed++;
++		dev->n_tags_ecc_fixed++;
+ 		if (eccres == YAFFS_ECC_RESULT_NO_ERROR)
+ 			eccres = YAFFS_ECC_RESULT_FIXED;
+ 		break;
+ 	default:
+ 		/* unrecovered tags-ECC error */
+-		dev->tagsEccUnfixed++;
++		dev->n_tags_ecc_unfixed++;
+ 		return rettags(etags, YAFFS_ECC_RESULT_UNFIXED, YAFFS_FAIL);
+ 	}
+ 
+ 	/* Unpack the tags to extended form and set ECC result.
+-	 * [set shouldBeFF just to keep yaffs_UnpackTags1 happy]
++	 * [set shouldBeFF just to keep yaffs_unpack_tags1 happy]
+ 	 */
+ 	pt1.shouldBeFF = 0xFFFFFFFF;
+-	yaffs_UnpackTags1(etags, &pt1);
+-	etags->eccResult = eccres;
++	yaffs_unpack_tags1(etags, &pt1);
++	etags->ecc_result = eccres;
+ 
+ 	/* Set deleted state */
+-	etags->chunkDeleted = deleted;
++	etags->is_deleted = deleted;
+ 	return YAFFS_OK;
+ }
+ 
+@@ -282,15 +278,15 @@ int nandmtd1_ReadChunkWithTagsFromNAND(y
+  *
+  * Returns YAFFS_OK or YAFFS_FAIL.
+  */
+-int nandmtd1_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo)
++int nandmtd1_MarkNANDBlockBad(struct yaffs_dev_s *dev, int block_no)
+ {
+-	struct mtd_info *mtd = dev->genericDevice;
+-	int blocksize = dev->nChunksPerBlock * dev->nDataBytesPerChunk;
++	struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
++	int blocksize = dev->param.chunks_per_block * dev->data_bytes_per_chunk;
+ 	int retval;
+ 
+-	yaffs_trace(YAFFS_TRACE_BAD_BLOCKS, "marking block %d bad\n", blockNo);
++	T(YAFFS_TRACE_BAD_BLOCKS,(TSTR("marking block %d bad"TENDSTR), block_no));
+ 
+-	retval = mtd->block_markbad(mtd, (loff_t)blocksize * blockNo);
++	retval = mtd->block_markbad(mtd, (loff_t)blocksize * block_no);
+ 	return (retval) ? YAFFS_FAIL : YAFFS_OK;
+ }
+ 
+@@ -305,9 +301,9 @@ static int nandmtd1_TestPrerequists(stru
+ 	int oobavail = mtd->ecclayout->oobavail;
+ 
+ 	if (oobavail < YTAG1_SIZE) {
+-		yaffs_trace(YAFFS_TRACE_ERROR,
+-			"mtd device has only %d bytes for tags, need %d\n",
+-			oobavail, YTAG1_SIZE);
++		T(YAFFS_TRACE_ERROR,
++			(TSTR("mtd device has only %d bytes for tags, need %d"TENDSTR),
++			oobavail, YTAG1_SIZE));
+ 		return YAFFS_FAIL;
+ 	}
+ 	return YAFFS_OK;
+@@ -322,13 +318,13 @@ static int nandmtd1_TestPrerequists(stru
+  *
+  * Always returns YAFFS_OK.
+  */
+-int nandmtd1_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
+-	yaffs_BlockState *pState, __u32 *pSequenceNumber)
++int nandmtd1_QueryNANDBlock(struct yaffs_dev_s *dev, int block_no,
++	yaffs_block_state_t *pState, __u32 *pSequenceNumber)
+ {
+-	struct mtd_info *mtd = dev->genericDevice;
+-	int chunkNo = blockNo * dev->nChunksPerBlock;
+-	loff_t addr = (loff_t)chunkNo * dev->nDataBytesPerChunk;
+-	yaffs_ExtendedTags etags;
++	struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
++	int chunkNo = block_no * dev->param.chunks_per_block;
++	loff_t addr = (loff_t)chunkNo * dev->data_bytes_per_chunk;
++	yaffs_ext_tags etags;
+ 	int state = YAFFS_BLOCK_STATE_DEAD;
+ 	int seqnum = 0;
+ 	int retval;
+@@ -340,17 +336,17 @@ int nandmtd1_QueryNANDBlock(struct yaffs
+ 		return YAFFS_FAIL;
+ 
+ 	retval = nandmtd1_ReadChunkWithTagsFromNAND(dev, chunkNo, NULL, &etags);
+-	etags.blockBad = (mtd->block_isbad)(mtd, addr);
+-	if (etags.blockBad) {
+-		yaffs_trace(YAFFS_TRACE_BAD_BLOCKS,
+-			"block %d is marked bad\n", blockNo);
++	etags.block_bad = (mtd->block_isbad)(mtd, addr);
++	if (etags.block_bad) {
++		T(YAFFS_TRACE_BAD_BLOCKS,
++			(TSTR("block %d is marked bad"TENDSTR), block_no));
+ 		state = YAFFS_BLOCK_STATE_DEAD;
+-	} else if (etags.eccResult != YAFFS_ECC_RESULT_NO_ERROR) {
++	} else if (etags.ecc_result != YAFFS_ECC_RESULT_NO_ERROR) {
+ 		/* bad tags, need to look more closely */
+ 		state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
+-	} else if (etags.chunkUsed) {
++	} else if (etags.chunk_used) {
+ 		state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
+-		seqnum = etags.sequenceNumber;
++		seqnum = etags.seq_number;
+ 	} else {
+ 		state = YAFFS_BLOCK_STATE_EMPTY;
+ 	}
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffs_mtdif1-compat.c linux-2.6.36-rc8.new/fs/yaffs2/yaffs_mtdif1-compat.c
+--- linux-2.6.36-rc8/fs/yaffs2/yaffs_mtdif1-compat.c	2010-10-20 13:17:58.956000294 +0300
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffs_mtdif1-compat.c	1970-01-01 02:00:00.000000000 +0200
+@@ -1,434 +0,0 @@
+-From ian@brightstareng.com Fri May 18 15:06:49 2007
+-From ian@brightstareng.com Fri May 18 15:08:21 2007
+-Received: from 206.173.66.57.ptr.us.xo.net ([206.173.66.57] helo=zebra.brightstareng.com)
+-	by apollo.linkchoose.co.uk with esmtp (Exim 4.60)
+-	(envelope-from <ian@brightstareng.com>)
+-	id 1Hp380-00011e-T6
+-	for david.goodenough@linkchoose.co.uk; Fri, 18 May 2007 15:08:21 +0100
+-Received: from localhost (localhost.localdomain [127.0.0.1])
+-	by zebra.brightstareng.com (Postfix) with ESMTP
+-	id 4819F28C004; Fri, 18 May 2007 10:07:49 -0400 (EDT)
+-Received: from zebra.brightstareng.com ([127.0.0.1])
+- by localhost (zebra [127.0.0.1]) (amavisd-new, port 10024) with ESMTP
+- id 05328-06; Fri, 18 May 2007 10:07:16 -0400 (EDT)
+-Received: from pippin (unknown [192.168.1.25])
+-	by zebra.brightstareng.com (Postfix) with ESMTP
+-	id 8BEF528C1BC; Fri, 18 May 2007 10:06:53 -0400 (EDT)
+-From: Ian McDonnell <ian@brightstareng.com>
+-To: David Goodenough <david.goodenough@linkchoose.co.uk>
+-Subject: Re: something tested this time -- yaffs_mtdif1-compat.c
+-Date: Fri, 18 May 2007 10:06:49 -0400
+-User-Agent: KMail/1.9.1
+-References: <200705142207.06909.ian@brightstareng.com> <200705171131.53536.ian@brightstareng.com> <200705181334.32166.david.goodenough@linkchoose.co.uk>
+-In-Reply-To: <200705181334.32166.david.goodenough@linkchoose.co.uk>
+-Cc: Andrea Conti <alyf@alyf.net>,
+- Charles Manning <manningc2@actrix.gen.nz>
+-MIME-Version: 1.0
+-Content-Type: Multipart/Mixed;
+-  boundary="Boundary-00=_5LbTGmt62YoutxM"
+-Message-Id: <200705181006.49860.ian@brightstareng.com>
+-X-Virus-Scanned: by amavisd-new at brightstareng.com
+-Status: R
+-X-Status: NT
+-X-KMail-EncryptionState:
+-X-KMail-SignatureState:
+-X-KMail-MDN-Sent:
+-
+---Boundary-00=_5LbTGmt62YoutxM
+-Content-Type: text/plain;
+-  charset="iso-8859-15"
+-Content-Transfer-Encoding: 7bit
+-Content-Disposition: inline
+-
+-David, Andrea,
+-
+-On Friday 18 May 2007 08:34, you wrote:
+-> Yea team.  With this fix in place (I put it in the wrong place
+-> at first) I can now mount and ls the Yaffs partition without
+-> an error messages!
+-
+-Good news!
+-
+-Attached is a newer yaffs_mtdif1.c with a bandaid to help the
+-2.6.18 and 2.6.19 versions of MTD not trip on the oob read.
+-See the LINUX_VERSION_CODE conditional in
+-nandmtd1_ReadChunkWithTagsFromNAND.
+-
+--imcd
+-
+---Boundary-00=_5LbTGmt62YoutxM
+-Content-Type: text/x-csrc;
+-  charset="iso-8859-15";
+-  name="yaffs_mtdif1.c"
+-Content-Transfer-Encoding: 7bit
+-Content-Disposition: attachment;
+-	filename="yaffs_mtdif1.c"
+-
+-/*
+- * YAFFS: Yet another FFS. A NAND-flash specific file system.
+- * yaffs_mtdif1.c  NAND mtd interface functions for small-page NAND.
+- *
+- * Copyright (C) 2002 Aleph One Ltd.
+- *   for Toby Churchill Ltd and Brightstar Engineering
+- *
+- * This program is free software; you can redistribute it and/or modify
+- * it under the terms of the GNU General Public License version 2 as
+- * published by the Free Software Foundation.
+- */
+-
+-/*
+- * This module provides the interface between yaffs_nand.c and the
+- * MTD API.  This version is used when the MTD interface supports the
+- * 'mtd_oob_ops' style calls to read_oob and write_oob, circa 2.6.17,
+- * and we have small-page NAND device.
+- *
+- * These functions are invoked via function pointers in yaffs_nand.c.
+- * This replaces functionality provided by functions in yaffs_mtdif.c
+- * and the yaffs_TagsCompatability functions in yaffs_tagscompat.c that are
+- * called in yaffs_mtdif.c when the function pointers are NULL.
+- * We assume the MTD layer is performing ECC (useNANDECC is true).
+- */
+-
+-#include "yportenv.h"
+-#include "yaffs_guts.h"
+-#include "yaffs_packedtags1.h"
+-#include "yaffs_tagscompat.h"	// for yaffs_CalcTagsECC
+-
+-#include "linux/kernel.h"
+-#include "linux/version.h"
+-#include "linux/types.h"
+-#include "linux/mtd/mtd.h"
+-
+-/* Don't compile this module if we don't have MTD's mtd_oob_ops interface */
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+-
+-const char *yaffs_mtdif1_c_version = "$Id$";
+-
+-#ifndef CONFIG_YAFFS_9BYTE_TAGS
+-# define YTAG1_SIZE 8
+-#else
+-# define YTAG1_SIZE 9
+-#endif
+-
+-#if 0
+-/* Use the following nand_ecclayout with MTD when using
+- * CONFIG_YAFFS_9BYTE_TAGS and the older on-NAND tags layout.
+- * If you have existing Yaffs images and the byte order differs from this,
+- * adjust 'oobfree' to match your existing Yaffs data.
+- *
+- * This nand_ecclayout scatters/gathers to/from the old-yaffs layout with the
+- * pageStatus byte (at NAND spare offset 4) scattered/gathered from/to
+- * the 9th byte.
+- *
+- * Old-style on-NAND format: T0,T1,T2,T3,P,B,T4,T5,E0,E1,E2,T6,T7,E3,E4,E5
+- * We have/need PackedTags1 plus pageStatus: T0,T1,T2,T3,T4,T5,T6,T7,P
+- * where Tn are the tag bytes, En are MTD's ECC bytes, P is the pageStatus
+- * byte and B is the small-page bad-block indicator byte.
+- */
+-static struct nand_ecclayout nand_oob_16 = {
+-	.eccbytes = 6,
+-	.eccpos = { 8, 9, 10, 13, 14, 15 },
+-	.oobavail = 9,
+-	.oobfree = { { 0, 4 }, { 6, 2 }, { 11, 2 }, { 4, 1 } }
+-};
+-#endif
+-
+-/* Write a chunk (page) of data to NAND.
+- *
+- * Caller always provides ExtendedTags data which are converted to a more
+- * compact (packed) form for storage in NAND.  A mini-ECC runs over the
+- * contents of the tags meta-data; used to valid the tags when read.
+- *
+- *  - Pack ExtendedTags to PackedTags1 form
+- *  - Compute mini-ECC for PackedTags1
+- *  - Write data and packed tags to NAND.
+- *
+- * Note: Due to the use of the PackedTags1 meta-data which does not include
+- * a full sequence number (as found in the larger PackedTags2 form) it is
+- * necessary for Yaffs to re-write a chunk/page (just once) to mark it as
+- * discarded and dirty.  This is not ideal: newer NAND parts are supposed
+- * to be written just once.  When Yaffs performs this operation, this
+- * function is called with a NULL data pointer -- calling MTD write_oob
+- * without data is valid usage (2.6.17).
+- *
+- * Any underlying MTD error results in YAFFS_FAIL.
+- * Returns YAFFS_OK or YAFFS_FAIL.
+- */
+-int nandmtd1_WriteChunkWithTagsToNAND(yaffs_Device *dev,
+-	int chunkInNAND, const __u8 * data, const yaffs_ExtendedTags * etags)
+-{
+-	struct mtd_info * mtd = dev->genericDevice;
+-	int chunkBytes = dev->nDataBytesPerChunk;
+-	loff_t addr = ((loff_t)chunkInNAND) * chunkBytes;
+-	struct mtd_oob_ops ops;
+-	yaffs_PackedTags1 pt1;
+-	int retval;
+-
+-	/* we assume that PackedTags1 and yaffs_Tags are compatible */
+-	compile_time_assertion(sizeof(yaffs_PackedTags1) == 12);
+-	compile_time_assertion(sizeof(yaffs_Tags) == 8);
+-
+-	yaffs_PackTags1(&pt1, etags);
+-	yaffs_CalcTagsECC((yaffs_Tags *)&pt1);
+-
+-	/* When deleting a chunk, the upper layer provides only skeletal
+-	 * etags, one with chunkDeleted set.  However, we need to update the
+-	 * tags, not erase them completely.  So we use the NAND write property
+-	 * that only zeroed-bits stick and set tag bytes to all-ones and
+-	 * zero just the (not) deleted bit.
+-	 */
+-#ifndef CONFIG_YAFFS_9BYTE_TAGS
+-	if (etags->chunkDeleted) {
+-		memset(&pt1, 0xff, 8);
+-		/* clear delete status bit to indicate deleted */
+-		pt1.deleted = 0;
+-	}
+-#else
+-	((__u8 *)&pt1)[8] = 0xff;
+-	if (etags->chunkDeleted) {
+-		memset(&pt1, 0xff, 8);
+-		/* zero pageStatus byte to indicate deleted */
+-		((__u8 *)&pt1)[8] = 0;
+-	}
+-#endif
+-
+-	memset(&ops, 0, sizeof(ops));
+-	ops.mode = MTD_OOB_AUTO;
+-	ops.len = (data) ? chunkBytes : 0;
+-	ops.ooblen = YTAG1_SIZE;
+-	ops.datbuf = (__u8 *)data;
+-	ops.oobbuf = (__u8 *)&pt1;
+-
+-	retval = mtd->write_oob(mtd, addr, &ops);
+-	if (retval) {
+-		yaffs_trace(YAFFS_TRACE_MTD,
+-			"write_oob failed, chunk %d, mtd error %d\n",
+-			chunkInNAND, retval);
+-	}
+-	return retval ? YAFFS_FAIL : YAFFS_OK;
+-}
+-
+-/* Return with empty ExtendedTags but add eccResult.
+- */
+-static int rettags(yaffs_ExtendedTags * etags, int eccResult, int retval)
+-{
+-	if (etags) {
+-		memset(etags, 0, sizeof(*etags));
+-		etags->eccResult = eccResult;
+-	}
+-	return retval;
+-}
+-
+-/* Read a chunk (page) from NAND.
+- *
+- * Caller expects ExtendedTags data to be usable even on error; that is,
+- * all members except eccResult and blockBad are zeroed.
+- *
+- *  - Check ECC results for data (if applicable)
+- *  - Check for blank/erased block (return empty ExtendedTags if blank)
+- *  - Check the PackedTags1 mini-ECC (correct if necessary/possible)
+- *  - Convert PackedTags1 to ExtendedTags
+- *  - Update eccResult and blockBad members to refect state.
+- *
+- * Returns YAFFS_OK or YAFFS_FAIL.
+- */
+-int nandmtd1_ReadChunkWithTagsFromNAND(yaffs_Device *dev,
+-	int chunkInNAND, __u8 * data, yaffs_ExtendedTags * etags)
+-{
+-	struct mtd_info * mtd = dev->genericDevice;
+-	int chunkBytes = dev->nDataBytesPerChunk;
+-	loff_t addr = ((loff_t)chunkInNAND) * chunkBytes;
+-	int eccres = YAFFS_ECC_RESULT_NO_ERROR;
+-	struct mtd_oob_ops ops;
+-	yaffs_PackedTags1 pt1;
+-	int retval;
+-	int deleted;
+-
+-	memset(&ops, 0, sizeof(ops));
+-	ops.mode = MTD_OOB_AUTO;
+-	ops.len = (data) ? chunkBytes : 0;
+-	ops.ooblen = YTAG1_SIZE;
+-	ops.datbuf = data;
+-	ops.oobbuf = (__u8 *)&pt1;
+-
+-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20))
+-	/* In MTD 2.6.18 to 2.6.19 nand_base.c:nand_do_read_oob() has a bug;
+-	 * help it out with ops.len = ops.ooblen when ops.datbuf == NULL.
+-	 */
+-	ops.len = (ops.datbuf) ? ops.len : ops.ooblen;
+-#endif
+-	/* Read page and oob using MTD.
+-	 * Check status and determine ECC result.
+-	 */
+-	retval = mtd->read_oob(mtd, addr, &ops);
+-	if (retval) {
+-		yaffs_trace(YAFFS_TRACE_MTD,
+-			"read_oob failed, chunk %d, mtd error %d\n",
+-			chunkInNAND, retval);
+-	}
+-
+-	switch (retval) {
+-	case 0:
+-		/* no error */
+-		break;
+-
+-	case -EUCLEAN:
+-		/* MTD's ECC fixed the data */
+-		eccres = YAFFS_ECC_RESULT_FIXED;
+-		dev->eccFixed++;
+-		break;
+-
+-	case -EBADMSG:
+-		/* MTD's ECC could not fix the data */
+-		dev->eccUnfixed++;
+-		/* fall into... */
+-	default:
+-		rettags(etags, YAFFS_ECC_RESULT_UNFIXED, 0);
+-		etags->blockBad = (mtd->block_isbad)(mtd, addr);
+-		return YAFFS_FAIL;
+-	}
+-
+-	/* Check for a blank/erased chunk.
+-	 */
+-	if (yaffs_CheckFF((__u8 *)&pt1, 8)) {
+-		/* when blank, upper layers want eccResult to be <= NO_ERROR */
+-		return rettags(etags, YAFFS_ECC_RESULT_NO_ERROR, YAFFS_OK);
+-	}
+-
+-#ifndef CONFIG_YAFFS_9BYTE_TAGS
+-	/* Read deleted status (bit) then return it to it's non-deleted
+-	 * state before performing tags mini-ECC check. pt1.deleted is
+-	 * inverted.
+-	 */
+-	deleted = !pt1.deleted;
+-	pt1.deleted = 1;
+-#else
+-	(void) deleted; /* not used */
+-#endif
+-
+-	/* Check the packed tags mini-ECC and correct if necessary/possible.
+-	 */
+-	retval = yaffs_CheckECCOnTags((yaffs_Tags *)&pt1);
+-	switch (retval) {
+-	case 0:
+-		/* no tags error, use MTD result */
+-		break;
+-	case 1:
+-		/* recovered tags-ECC error */
+-		dev->tagsEccFixed++;
+-		eccres = YAFFS_ECC_RESULT_FIXED;
+-		break;
+-	default:
+-		/* unrecovered tags-ECC error */
+-		dev->tagsEccUnfixed++;
+-		return rettags(etags, YAFFS_ECC_RESULT_UNFIXED, YAFFS_FAIL);
+-	}
+-
+-	/* Unpack the tags to extended form and set ECC result.
+-	 * [set shouldBeFF just to keep yaffs_UnpackTags1 happy]
+-	 */
+-	pt1.shouldBeFF = 0xFFFFFFFF;
+-	yaffs_UnpackTags1(etags, &pt1);
+-	etags->eccResult = eccres;
+-
+-	/* Set deleted state.
+-	 */
+-#ifndef CONFIG_YAFFS_9BYTE_TAGS
+-	etags->chunkDeleted = deleted;
+-#else
+-	etags->chunkDeleted = (yaffs_CountBits(((__u8 *)&pt1)[8]) < 7);
+-#endif
+-	return YAFFS_OK;
+-}
+-
+-/* Mark a block bad.
+- *
+- * This is a persistant state.
+- * Use of this function should be rare.
+- *
+- * Returns YAFFS_OK or YAFFS_FAIL.
+- */
+-int nandmtd1_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo)
+-{
+-	struct mtd_info * mtd = dev->genericDevice;
+-	int blocksize = dev->nChunksPerBlock * dev->nDataBytesPerChunk;
+-	int retval;
+-
+-	yaffs_trace(YAFFS_TRACE_BAD_BLOCKS, "marking block %d bad", blockNo);
+-
+-	retval = mtd->block_markbad(mtd, (loff_t)blocksize * blockNo);
+-	return (retval) ? YAFFS_FAIL : YAFFS_OK;
+-}
+-
+-/* Check any MTD prerequists.
+- *
+- * Returns YAFFS_OK or YAFFS_FAIL.
+- */
+-static int nandmtd1_TestPrerequists(struct mtd_info * mtd)
+-{
+-	/* 2.6.18 has mtd->ecclayout->oobavail */
+-	/* 2.6.21 has mtd->ecclayout->oobavail and mtd->oobavail */
+-	int oobavail = mtd->ecclayout->oobavail;
+-
+-	if (oobavail < YTAG1_SIZE) {
+-		yaffs_trace(YAFFS_TRACE_ERROR,
+-			"mtd device has only %d bytes for tags, need %d",
+-			oobavail, YTAG1_SIZE);
+-		return YAFFS_FAIL;
+-	}
+-	return YAFFS_OK;
+-}
+-
+-/* Query for the current state of a specific block.
+- *
+- * Examine the tags of the first chunk of the block and return the state:
+- *  - YAFFS_BLOCK_STATE_DEAD, the block is marked bad
+- *  - YAFFS_BLOCK_STATE_NEEDS_SCANNING, the block is in use
+- *  - YAFFS_BLOCK_STATE_EMPTY, the block is clean
+- *
+- * Always returns YAFFS_OK.
+- */
+-int nandmtd1_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
+-	yaffs_BlockState * pState, int *pSequenceNumber)
+-{
+-	struct mtd_info * mtd = dev->genericDevice;
+-	int chunkNo = blockNo * dev->nChunksPerBlock;
+-	yaffs_ExtendedTags etags;
+-	int state = YAFFS_BLOCK_STATE_DEAD;
+-	int seqnum = 0;
+-	int retval;
+-
+-	/* We don't yet have a good place to test for MTD config prerequists.
+-	 * Do it here as we are called during the initial scan.
+-	 */
+-	if (nandmtd1_TestPrerequists(mtd) != YAFFS_OK) {
+-		return YAFFS_FAIL;
+-	}
+-
+-	retval = nandmtd1_ReadChunkWithTagsFromNAND(dev, chunkNo, NULL, &etags);
+-	if (etags.blockBad) {
+-		yaffs_trace(YAFFS_TRACE_BAD_BLOCKS,
+-			"block %d is marked bad", blockNo);
+-		state = YAFFS_BLOCK_STATE_DEAD;
+-	}
+-	else if (etags.chunkUsed) {
+-		state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
+-		seqnum = etags.sequenceNumber;
+-	}
+-	else {
+-		state = YAFFS_BLOCK_STATE_EMPTY;
+-	}
+-
+-	*pState = state;
+-	*pSequenceNumber = seqnum;
+-
+-	/* query always succeeds */
+-	return YAFFS_OK;
+-}
+-
+-#endif /*KERNEL_VERSION*/
+-
+---Boundary-00=_5LbTGmt62YoutxM--
+-
+-
+-
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffs_mtdif1.h linux-2.6.36-rc8.new/fs/yaffs2/yaffs_mtdif1.h
+--- linux-2.6.36-rc8/fs/yaffs2/yaffs_mtdif1.h	2010-10-20 13:17:58.957000294 +0300
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffs_mtdif1.h	2010-10-20 13:28:16.062000294 +0300
+@@ -1,7 +1,7 @@
+ /*
+  * YAFFS: Yet another Flash File System. A NAND-flash specific file system.
+  *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+  *   for Toby Churchill Ltd and Brightstar Engineering
+  *
+  * This program is free software; you can redistribute it and/or modify
+@@ -14,15 +14,15 @@
+ #ifndef __YAFFS_MTDIF1_H__
+ #define __YAFFS_MTDIF1_H__
+ 
+-int nandmtd1_WriteChunkWithTagsToNAND(yaffs_Device *dev, int chunkInNAND,
+-	const __u8 *data, const yaffs_ExtendedTags *tags);
++int nandmtd1_WriteChunkWithTagsToNAND(yaffs_dev_t *dev, int nand_chunk,
++	const __u8 *data, const yaffs_ext_tags *tags);
+ 
+-int nandmtd1_ReadChunkWithTagsFromNAND(yaffs_Device *dev, int chunkInNAND,
+-	__u8 *data, yaffs_ExtendedTags *tags);
++int nandmtd1_ReadChunkWithTagsFromNAND(yaffs_dev_t *dev, int nand_chunk,
++	__u8 *data, yaffs_ext_tags *tags);
+ 
+-int nandmtd1_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo);
++int nandmtd1_MarkNANDBlockBad(struct yaffs_dev_s *dev, int block_no);
+ 
+-int nandmtd1_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
+-	yaffs_BlockState *state, __u32 *sequenceNumber);
++int nandmtd1_QueryNANDBlock(struct yaffs_dev_s *dev, int block_no,
++	yaffs_block_state_t *state, __u32 *seq_number);
+ 
+ #endif
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffs_mtdif2.c linux-2.6.36-rc8.new/fs/yaffs2/yaffs_mtdif2.c
+--- linux-2.6.36-rc8/fs/yaffs2/yaffs_mtdif2.c	2010-10-20 13:17:58.957000294 +0300
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffs_mtdif2.c	2010-10-20 13:28:16.028000294 +0300
+@@ -1,7 +1,7 @@
+ /*
+  * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+  *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+  *   for Toby Churchill Ltd and Brightstar Engineering
+  *
+  * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -13,11 +13,8 @@
+ 
+ /* mtd interface for YAFFS2 */
+ 
+-const char *yaffs_mtdif2_c_version =
+-	"$Id: yaffs_mtdif2.c,v 1.23 2009-03-06 17:20:53 wookey Exp $";
+-
+ #include "yportenv.h"
+-
++#include "yaffs_trace.h"
+ 
+ #include "yaffs_mtdif2.h"
+ 
+@@ -27,15 +24,17 @@ const char *yaffs_mtdif2_c_version =
+ 
+ #include "yaffs_packedtags2.h"
+ 
++#include "yaffs_linux.h"
++
+ /* NB For use with inband tags....
+  * We assume that the data buffer is of size totalBytersPerChunk so that we can also
+  * use it to load the tags.
+  */
+-int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device *dev, int chunkInNAND,
++int nandmtd2_WriteChunkWithTagsToNAND(yaffs_dev_t *dev, int nand_chunk,
+ 				      const __u8 *data,
+-				      const yaffs_ExtendedTags *tags)
++				      const yaffs_ext_tags *tags)
+ {
+-	struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
++	struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
+ #if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
+ 	struct mtd_oob_ops ops;
+ #else
+@@ -47,13 +46,16 @@ int nandmtd2_WriteChunkWithTagsToNAND(ya
+ 
+ 	yaffs_PackedTags2 pt;
+ 
++	int packed_tags_size = dev->param.no_tags_ecc ? sizeof(pt.t) : sizeof(pt);
++	void * packed_tags_ptr = dev->param.no_tags_ecc ? (void *) &pt.t : (void *)&pt;
++
+ 	T(YAFFS_TRACE_MTD,
+ 	  (TSTR
+ 	   ("nandmtd2_WriteChunkWithTagsToNAND chunk %d data %p tags %p"
+-	    TENDSTR), chunkInNAND, data, tags));
++	    TENDSTR), nand_chunk, data, tags));
+ 
+ 
+-	addr  = ((loff_t) chunkInNAND) * dev->totalBytesPerChunk;
++	addr  = ((loff_t) nand_chunk) * dev->param.total_bytes_per_chunk;
+ 
+ 	/* For yaffs2 writing there must be both data and tags.
+ 	 * If we're using inband tags, then the tags are stuffed into
+@@ -61,30 +63,30 @@ int nandmtd2_WriteChunkWithTagsToNAND(ya
+ 	 */
+ 	if (!data || !tags)
+ 		BUG();
+-	else if (dev->inbandTags) {
++	else if (dev->param.inband_tags) {
+ 		yaffs_PackedTags2TagsPart *pt2tp;
+-		pt2tp = (yaffs_PackedTags2TagsPart *)(data + dev->nDataBytesPerChunk);
++		pt2tp = (yaffs_PackedTags2TagsPart *)(data + dev->data_bytes_per_chunk);
+ 		yaffs_PackTags2TagsPart(pt2tp, tags);
+ 	} else
+-		yaffs_PackTags2(&pt, tags);
++		yaffs_PackTags2(&pt, tags, !dev->param.no_tags_ecc);
+ 
+ #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+ 	ops.mode = MTD_OOB_AUTO;
+-	ops.ooblen = (dev->inbandTags) ? 0 : sizeof(pt);
+-	ops.len = dev->totalBytesPerChunk;
++	ops.ooblen = (dev->param.inband_tags) ? 0 : packed_tags_size;
++	ops.len = dev->param.total_bytes_per_chunk;
+ 	ops.ooboffs = 0;
+ 	ops.datbuf = (__u8 *)data;
+-	ops.oobbuf = (dev->inbandTags) ? NULL : (void *)&pt;
++	ops.oobbuf = (dev->param.inband_tags) ? NULL : packed_tags_ptr;
+ 	retval = mtd->write_oob(mtd, addr, &ops);
+ 
+ #else
+-	if (!dev->inbandTags) {
++	if (!dev->param.inband_tags) {
+ 		retval =
+-		    mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
+-				   &dummy, data, (__u8 *) &pt, NULL);
++		    mtd->write_ecc(mtd, addr, dev->data_bytes_per_chunk,
++				   &dummy, data, (__u8 *) packed_tags_ptr, NULL);
+ 	} else {
+ 		retval =
+-		    mtd->write(mtd, addr, dev->totalBytesPerChunk, &dummy,
++		    mtd->write(mtd, addr, dev->param.total_bytes_per_chunk, &dummy,
+ 			       data);
+ 	}
+ #endif
+@@ -95,10 +97,10 @@ int nandmtd2_WriteChunkWithTagsToNAND(ya
+ 		return YAFFS_FAIL;
+ }
+ 
+-int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device *dev, int chunkInNAND,
+-				       __u8 *data, yaffs_ExtendedTags *tags)
++int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_dev_t *dev, int nand_chunk,
++				       __u8 *data, yaffs_ext_tags *tags)
+ {
+-	struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
++	struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
+ #if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
+ 	struct mtd_oob_ops ops;
+ #endif
+@@ -106,20 +108,23 @@ int nandmtd2_ReadChunkWithTagsFromNAND(y
+ 	int retval = 0;
+ 	int localData = 0;
+ 
+-	loff_t addr = ((loff_t) chunkInNAND) * dev->totalBytesPerChunk;
++	loff_t addr = ((loff_t) nand_chunk) * dev->param.total_bytes_per_chunk;
+ 
+ 	yaffs_PackedTags2 pt;
+ 
++	int packed_tags_size = dev->param.no_tags_ecc ? sizeof(pt.t) : sizeof(pt);
++	void * packed_tags_ptr = dev->param.no_tags_ecc ? (void *) &pt.t: (void *)&pt;
++
+ 	T(YAFFS_TRACE_MTD,
+ 	  (TSTR
+ 	   ("nandmtd2_ReadChunkWithTagsFromNAND chunk %d data %p tags %p"
+-	    TENDSTR), chunkInNAND, data, tags));
++	    TENDSTR), nand_chunk, data, tags));
+ 
+-	if (dev->inbandTags) {
++	if (dev->param.inband_tags) {
+ 
+ 		if (!data) {
+ 			localData = 1;
+-			data = yaffs_GetTempBuffer(dev, __LINE__);
++			data = yaffs_get_temp_buffer(dev, __LINE__);
+ 		}
+ 
+ 
+@@ -127,30 +132,30 @@ int nandmtd2_ReadChunkWithTagsFromNAND(y
+ 
+ 
+ #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+-	if (dev->inbandTags || (data && !tags))
+-		retval = mtd->read(mtd, addr, dev->totalBytesPerChunk,
++	if (dev->param.inband_tags || (data && !tags))
++		retval = mtd->read(mtd, addr, dev->param.total_bytes_per_chunk,
+ 				&dummy, data);
+ 	else if (tags) {
+ 		ops.mode = MTD_OOB_AUTO;
+-		ops.ooblen = sizeof(pt);
+-		ops.len = data ? dev->nDataBytesPerChunk : sizeof(pt);
++		ops.ooblen = packed_tags_size;
++		ops.len = data ? dev->data_bytes_per_chunk : packed_tags_size;
+ 		ops.ooboffs = 0;
+ 		ops.datbuf = data;
+-		ops.oobbuf = dev->spareBuffer;
++		ops.oobbuf = yaffs_dev_to_lc(dev)->spareBuffer;
+ 		retval = mtd->read_oob(mtd, addr, &ops);
+ 	}
+ #else
+-	if (!dev->inbandTags && data && tags) {
++	if (!dev->param.inband_tags && data && tags) {
+ 
+-		retval = mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
++		retval = mtd->read_ecc(mtd, addr, dev->data_bytes_per_chunk,
+ 					  &dummy, data, dev->spareBuffer,
+ 					  NULL);
+ 	} else {
+ 		if (data)
+ 			retval =
+-			    mtd->read(mtd, addr, dev->nDataBytesPerChunk, &dummy,
++			    mtd->read(mtd, addr, dev->data_bytes_per_chunk, &dummy,
+ 				      data);
+-		if (!dev->inbandTags && tags)
++		if (!dev->param.inband_tags && tags)
+ 			retval =
+ 			    mtd->read_oob(mtd, addr, mtd->oobsize, &dummy,
+ 					  dev->spareBuffer);
+@@ -158,41 +163,47 @@ int nandmtd2_ReadChunkWithTagsFromNAND(y
+ #endif
+ 
+ 
+-	if (dev->inbandTags) {
++	if (dev->param.inband_tags) {
+ 		if (tags) {
+ 			yaffs_PackedTags2TagsPart *pt2tp;
+-			pt2tp = (yaffs_PackedTags2TagsPart *)&data[dev->nDataBytesPerChunk];
+-			yaffs_UnpackTags2TagsPart(tags, pt2tp);
++			pt2tp = (yaffs_PackedTags2TagsPart *)&data[dev->data_bytes_per_chunk];
++			yaffs_unpack_tags2tags_part(tags, pt2tp);
+ 		}
+ 	} else {
+ 		if (tags) {
+-			memcpy(&pt, dev->spareBuffer, sizeof(pt));
+-			yaffs_UnpackTags2(tags, &pt);
++			memcpy(packed_tags_ptr, yaffs_dev_to_lc(dev)->spareBuffer, packed_tags_size);
++			yaffs_unpack_tags2(tags, &pt, !dev->param.no_tags_ecc);
+ 		}
+ 	}
+ 
+ 	if (localData)
+-		yaffs_ReleaseTempBuffer(dev, data, __LINE__);
++		yaffs_release_temp_buffer(dev, data, __LINE__);
+ 
+-	if (tags && retval == -EBADMSG && tags->eccResult == YAFFS_ECC_RESULT_NO_ERROR)
+-		tags->eccResult = YAFFS_ECC_RESULT_UNFIXED;
++	if (tags && retval == -EBADMSG && tags->ecc_result == YAFFS_ECC_RESULT_NO_ERROR) {
++		tags->ecc_result = YAFFS_ECC_RESULT_UNFIXED;
++		dev->n_ecc_unfixed++;
++	}
++	if(tags && retval == -EUCLEAN && tags->ecc_result == YAFFS_ECC_RESULT_NO_ERROR) {
++		tags->ecc_result = YAFFS_ECC_RESULT_FIXED;
++		dev->n_ecc_fixed++;
++	}
+ 	if (retval == 0)
+ 		return YAFFS_OK;
+ 	else
+ 		return YAFFS_FAIL;
+ }
+ 
+-int nandmtd2_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo)
++int nandmtd2_MarkNANDBlockBad(struct yaffs_dev_s *dev, int block_no)
+ {
+-	struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
++	struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
+ 	int retval;
+ 	T(YAFFS_TRACE_MTD,
+-	  (TSTR("nandmtd2_MarkNANDBlockBad %d" TENDSTR), blockNo));
++	  (TSTR("nandmtd2_MarkNANDBlockBad %d" TENDSTR), block_no));
+ 
+ 	retval =
+ 	    mtd->block_markbad(mtd,
+-			       blockNo * dev->nChunksPerBlock *
+-			       dev->totalBytesPerChunk);
++			       block_no * dev->param.chunks_per_block *
++			       dev->param.total_bytes_per_chunk);
+ 
+ 	if (retval == 0)
+ 		return YAFFS_OK;
+@@ -201,41 +212,41 @@ int nandmtd2_MarkNANDBlockBad(struct yaf
+ 
+ }
+ 
+-int nandmtd2_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
+-			    yaffs_BlockState *state, __u32 *sequenceNumber)
++int nandmtd2_QueryNANDBlock(struct yaffs_dev_s *dev, int block_no,
++			    yaffs_block_state_t *state, __u32 *seq_number)
+ {
+-	struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
++	struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
+ 	int retval;
+ 
+ 	T(YAFFS_TRACE_MTD,
+-	  (TSTR("nandmtd2_QueryNANDBlock %d" TENDSTR), blockNo));
++	  (TSTR("nandmtd2_QueryNANDBlock %d" TENDSTR), block_no));
+ 	retval =
+ 	    mtd->block_isbad(mtd,
+-			     blockNo * dev->nChunksPerBlock *
+-			     dev->totalBytesPerChunk);
++			     block_no * dev->param.chunks_per_block *
++			     dev->param.total_bytes_per_chunk);
+ 
+ 	if (retval) {
+ 		T(YAFFS_TRACE_MTD, (TSTR("block is bad" TENDSTR)));
+ 
+ 		*state = YAFFS_BLOCK_STATE_DEAD;
+-		*sequenceNumber = 0;
++		*seq_number = 0;
+ 	} else {
+-		yaffs_ExtendedTags t;
++		yaffs_ext_tags t;
+ 		nandmtd2_ReadChunkWithTagsFromNAND(dev,
+-						   blockNo *
+-						   dev->nChunksPerBlock, NULL,
++						   block_no *
++						   dev->param.chunks_per_block, NULL,
+ 						   &t);
+ 
+-		if (t.chunkUsed) {
+-			*sequenceNumber = t.sequenceNumber;
++		if (t.chunk_used) {
++			*seq_number = t.seq_number;
+ 			*state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
+ 		} else {
+-			*sequenceNumber = 0;
++			*seq_number = 0;
+ 			*state = YAFFS_BLOCK_STATE_EMPTY;
+ 		}
+ 	}
+ 	T(YAFFS_TRACE_MTD,
+-	  (TSTR("block is bad seq %d state %d" TENDSTR), *sequenceNumber,
++	  (TSTR("block is bad seq %d state %d" TENDSTR), *seq_number,
+ 	   *state));
+ 
+ 	if (retval == 0)
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffs_mtdif2.h linux-2.6.36-rc8.new/fs/yaffs2/yaffs_mtdif2.h
+--- linux-2.6.36-rc8/fs/yaffs2/yaffs_mtdif2.h	2010-10-20 13:17:58.957000294 +0300
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffs_mtdif2.h	2010-10-20 13:28:16.062000294 +0300
+@@ -1,7 +1,7 @@
+ /*
+  * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+  *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+  *   for Toby Churchill Ltd and Brightstar Engineering
+  *
+  * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -17,13 +17,13 @@
+ #define __YAFFS_MTDIF2_H__
+ 
+ #include "yaffs_guts.h"
+-int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device *dev, int chunkInNAND,
++int nandmtd2_WriteChunkWithTagsToNAND(yaffs_dev_t *dev, int nand_chunk,
+ 				const __u8 *data,
+-				const yaffs_ExtendedTags *tags);
+-int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device *dev, int chunkInNAND,
+-				__u8 *data, yaffs_ExtendedTags *tags);
+-int nandmtd2_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo);
+-int nandmtd2_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
+-			yaffs_BlockState *state, __u32 *sequenceNumber);
++				const yaffs_ext_tags *tags);
++int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_dev_t *dev, int nand_chunk,
++				__u8 *data, yaffs_ext_tags *tags);
++int nandmtd2_MarkNANDBlockBad(struct yaffs_dev_s *dev, int block_no);
++int nandmtd2_QueryNANDBlock(struct yaffs_dev_s *dev, int block_no,
++			yaffs_block_state_t *state, __u32 *seq_number);
+ 
+ #endif
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffs_mtdif.c linux-2.6.36-rc8.new/fs/yaffs2/yaffs_mtdif.c
+--- linux-2.6.36-rc8/fs/yaffs2/yaffs_mtdif.c	2010-10-20 13:17:58.958000294 +0300
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffs_mtdif.c	2010-10-20 13:28:16.029000294 +0300
+@@ -1,7 +1,7 @@
+ /*
+  * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+  *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+  *   for Toby Churchill Ltd and Brightstar Engineering
+  *
+  * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -11,9 +11,6 @@
+  * published by the Free Software Foundation.
+  */
+ 
+-const char *yaffs_mtdif_c_version =
+-	"$Id: yaffs_mtdif.c,v 1.22 2009-03-06 17:20:51 wookey Exp $";
+-
+ #include "yportenv.h"
+ 
+ 
+@@ -24,208 +21,26 @@ const char *yaffs_mtdif_c_version =
+ #include "linux/time.h"
+ #include "linux/mtd/nand.h"
+ 
+-#if (MTD_VERSION_CODE < MTD_VERSION(2, 6, 18))
+-static struct nand_oobinfo yaffs_oobinfo = {
+-	.useecc = 1,
+-	.eccbytes = 6,
+-	.eccpos = {8, 9, 10, 13, 14, 15}
+-};
+-
+-static struct nand_oobinfo yaffs_noeccinfo = {
+-	.useecc = 0,
+-};
+-#endif
+-
+-#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
+-static inline void translate_spare2oob(const yaffs_Spare *spare, __u8 *oob)
+-{
+-	oob[0] = spare->tagByte0;
+-	oob[1] = spare->tagByte1;
+-	oob[2] = spare->tagByte2;
+-	oob[3] = spare->tagByte3;
+-	oob[4] = spare->tagByte4;
+-	oob[5] = spare->tagByte5 & 0x3f;
+-	oob[5] |= spare->blockStatus == 'Y' ? 0 : 0x80;
+-	oob[5] |= spare->pageStatus == 0 ? 0 : 0x40;
+-	oob[6] = spare->tagByte6;
+-	oob[7] = spare->tagByte7;
+-}
+-
+-static inline void translate_oob2spare(yaffs_Spare *spare, __u8 *oob)
+-{
+-	struct yaffs_NANDSpare *nspare = (struct yaffs_NANDSpare *)spare;
+-	spare->tagByte0 = oob[0];
+-	spare->tagByte1 = oob[1];
+-	spare->tagByte2 = oob[2];
+-	spare->tagByte3 = oob[3];
+-	spare->tagByte4 = oob[4];
+-	spare->tagByte5 = oob[5] == 0xff ? 0xff : oob[5] & 0x3f;
+-	spare->blockStatus = oob[5] & 0x80 ? 0xff : 'Y';
+-	spare->pageStatus = oob[5] & 0x40 ? 0xff : 0;
+-	spare->ecc1[0] = spare->ecc1[1] = spare->ecc1[2] = 0xff;
+-	spare->tagByte6 = oob[6];
+-	spare->tagByte7 = oob[7];
+-	spare->ecc2[0] = spare->ecc2[1] = spare->ecc2[2] = 0xff;
+-
+-	nspare->eccres1 = nspare->eccres2 = 0; /* FIXME */
+-}
+-#endif
+-
+-int nandmtd_WriteChunkToNAND(yaffs_Device *dev, int chunkInNAND,
+-			     const __u8 *data, const yaffs_Spare *spare)
+-{
+-	struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
+-#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
+-	struct mtd_oob_ops ops;
+-#endif
+-	size_t dummy;
+-	int retval = 0;
+-
+-	loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk;
+-#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
+-	__u8 spareAsBytes[8]; /* OOB */
+-
+-	if (data && !spare)
+-		retval = mtd->write(mtd, addr, dev->nDataBytesPerChunk,
+-				&dummy, data);
+-	else if (spare) {
+-		if (dev->useNANDECC) {
+-			translate_spare2oob(spare, spareAsBytes);
+-			ops.mode = MTD_OOB_AUTO;
+-			ops.ooblen = 8; /* temp hack */
+-		} else {
+-			ops.mode = MTD_OOB_RAW;
+-			ops.ooblen = YAFFS_BYTES_PER_SPARE;
+-		}
+-		ops.len = data ? dev->nDataBytesPerChunk : ops.ooblen;
+-		ops.datbuf = (u8 *)data;
+-		ops.ooboffs = 0;
+-		ops.oobbuf = spareAsBytes;
+-		retval = mtd->write_oob(mtd, addr, &ops);
+-	}
+-#else
+-	__u8 *spareAsBytes = (__u8 *) spare;
+-
+-	if (data && spare) {
+-		if (dev->useNANDECC)
+-			retval =
+-			    mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
+-					   &dummy, data, spareAsBytes,
+-					   &yaffs_oobinfo);
+-		else
+-			retval =
+-			    mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
+-					   &dummy, data, spareAsBytes,
+-					   &yaffs_noeccinfo);
+-	} else {
+-		if (data)
+-			retval =
+-			    mtd->write(mtd, addr, dev->nDataBytesPerChunk, &dummy,
+-				       data);
+-		if (spare)
+-			retval =
+-			    mtd->write_oob(mtd, addr, YAFFS_BYTES_PER_SPARE,
+-					   &dummy, spareAsBytes);
+-	}
+-#endif
+-
+-	if (retval == 0)
+-		return YAFFS_OK;
+-	else
+-		return YAFFS_FAIL;
+-}
+-
+-int nandmtd_ReadChunkFromNAND(yaffs_Device *dev, int chunkInNAND, __u8 *data,
+-			      yaffs_Spare *spare)
+-{
+-	struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
+-#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
+-	struct mtd_oob_ops ops;
+-#endif
+-	size_t dummy;
+-	int retval = 0;
++#include "yaffs_linux.h"
+ 
+-	loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk;
+-#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
+-	__u8 spareAsBytes[8]; /* OOB */
+-
+-	if (data && !spare)
+-		retval = mtd->read(mtd, addr, dev->nDataBytesPerChunk,
+-				&dummy, data);
+-	else if (spare) {
+-		if (dev->useNANDECC) {
+-			ops.mode = MTD_OOB_AUTO;
+-			ops.ooblen = 8; /* temp hack */
+-		} else {
+-			ops.mode = MTD_OOB_RAW;
+-			ops.ooblen = YAFFS_BYTES_PER_SPARE;
+-		}
+-		ops.len = data ? dev->nDataBytesPerChunk : ops.ooblen;
+-		ops.datbuf = data;
+-		ops.ooboffs = 0;
+-		ops.oobbuf = spareAsBytes;
+-		retval = mtd->read_oob(mtd, addr, &ops);
+-		if (dev->useNANDECC)
+-			translate_oob2spare(spare, spareAsBytes);
+-	}
+-#else
+-	__u8 *spareAsBytes = (__u8 *) spare;
+-
+-	if (data && spare) {
+-		if (dev->useNANDECC) {
+-			/* Careful, this call adds 2 ints */
+-			/* to the end of the spare data.  Calling function */
+-			/* should allocate enough memory for spare, */
+-			/* i.e. [YAFFS_BYTES_PER_SPARE+2*sizeof(int)]. */
+-			retval =
+-			    mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
+-					  &dummy, data, spareAsBytes,
+-					  &yaffs_oobinfo);
+-		} else {
+-			retval =
+-			    mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
+-					  &dummy, data, spareAsBytes,
+-					  &yaffs_noeccinfo);
+-		}
+-	} else {
+-		if (data)
+-			retval =
+-			    mtd->read(mtd, addr, dev->nDataBytesPerChunk, &dummy,
+-				      data);
+-		if (spare)
+-			retval =
+-			    mtd->read_oob(mtd, addr, YAFFS_BYTES_PER_SPARE,
+-					  &dummy, spareAsBytes);
+-	}
+-#endif
+-
+-	if (retval == 0)
+-		return YAFFS_OK;
+-	else
+-		return YAFFS_FAIL;
+-}
+-
+-int nandmtd_EraseBlockInNAND(yaffs_Device *dev, int blockNumber)
++int nandmtd_EraseBlockInNAND(yaffs_dev_t *dev, int blockNumber)
+ {
+-	struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
++	struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
+ 	__u32 addr =
+-	    ((loff_t) blockNumber) * dev->nDataBytesPerChunk
+-		* dev->nChunksPerBlock;
++	    ((loff_t) blockNumber) * dev->param.total_bytes_per_chunk
++		* dev->param.chunks_per_block;
+ 	struct erase_info ei;
++	
+ 	int retval = 0;
+ 
+ 	ei.mtd = mtd;
+ 	ei.addr = addr;
+-	ei.len = dev->nDataBytesPerChunk * dev->nChunksPerBlock;
++	ei.len = dev->param.total_bytes_per_chunk * dev->param.chunks_per_block;
+ 	ei.time = 1000;
+ 	ei.retries = 2;
+ 	ei.callback = NULL;
+ 	ei.priv = (u_long) dev;
+ 
+-	/* Todo finish off the ei if required */
+-
+-	sema_init(&dev->sem, 0);
+-
+ 	retval = mtd->erase(mtd, &ei);
+ 
+ 	if (retval == 0)
+@@ -234,7 +49,7 @@ int nandmtd_EraseBlockInNAND(yaffs_Devic
+ 		return YAFFS_FAIL;
+ }
+ 
+-int nandmtd_InitialiseNAND(yaffs_Device *dev)
++int nandmtd_InitialiseNAND(yaffs_dev_t *dev)
+ {
+ 	return YAFFS_OK;
+ }
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffs_mtdif.h linux-2.6.36-rc8.new/fs/yaffs2/yaffs_mtdif.h
+--- linux-2.6.36-rc8/fs/yaffs2/yaffs_mtdif.h	2010-10-20 13:17:58.958000294 +0300
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffs_mtdif.h	2010-10-20 13:28:16.062000294 +0300
+@@ -1,7 +1,7 @@
+ /*
+  * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+  *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+  *   for Toby Churchill Ltd and Brightstar Engineering
+  *
+  * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -22,11 +22,6 @@
+ extern struct nand_oobinfo yaffs_oobinfo;
+ extern struct nand_oobinfo yaffs_noeccinfo;
+ #endif
+-
+-int nandmtd_WriteChunkToNAND(yaffs_Device *dev, int chunkInNAND,
+-			const __u8 *data, const yaffs_Spare *spare);
+-int nandmtd_ReadChunkFromNAND(yaffs_Device *dev, int chunkInNAND, __u8 *data,
+-			yaffs_Spare *spare);
+-int nandmtd_EraseBlockInNAND(yaffs_Device *dev, int blockNumber);
+-int nandmtd_InitialiseNAND(yaffs_Device *dev);
++int nandmtd_EraseBlockInNAND(yaffs_dev_t *dev, int blockNumber);
++int nandmtd_InitialiseNAND(yaffs_dev_t *dev);
+ #endif
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffs_nameval.c linux-2.6.36-rc8.new/fs/yaffs2/yaffs_nameval.c
+--- linux-2.6.36-rc8/fs/yaffs2/yaffs_nameval.c	1970-01-01 02:00:00.000000000 +0200
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffs_nameval.c	2010-10-20 13:28:16.029000294 +0300
+@@ -0,0 +1,197 @@
++/*
++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2010 Aleph One Ltd.
++ *   for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ */
++
++/*
++ * This simple implementation of a name-value store assumes a small number of values and fits
++ * into a small finite buffer.
++ *
++ * Each attribute is stored as a record:
++ *  sizeof(int) bytes   record size.
++ *  strnlen+1 bytes name null terminated.
++ *  nbytes    value.
++ *  ----------
++ *  total size  stored in record size 
++ *
++ * This code has not been tested with unicode yet.
++ */
++
++
++#include "yaffs_nameval.h"
++
++#include "yportenv.h"
++ 
++static int nval_find(const char *xb, int xb_size, const YCHAR *name,
++		int *exist_size)
++{
++	int pos=0;
++	int size;
++
++	memcpy(&size,xb,sizeof(int));
++	while(size > 0 && (size < xb_size) && (pos + size < xb_size)){
++		if(yaffs_strncmp((YCHAR *)(xb+pos+sizeof(int)),name,size) == 0){
++			if(exist_size)
++				*exist_size = size;
++			return pos;
++		}
++		pos += size;
++		if(pos < xb_size -sizeof(int))
++			memcpy(&size,xb + pos,sizeof(int));
++		else
++			size = 0;
++	}
++	if(exist_size)
++		*exist_size = 0;
++	return -1;
++}
++
++static int nval_used(const char *xb, int xb_size)
++{
++	int pos=0;
++	int size;
++
++	memcpy(&size,xb + pos,sizeof(int));
++	while(size > 0 && (size < xb_size) && (pos + size < xb_size)){
++		pos += size;
++		if(pos < xb_size -sizeof(int))
++			memcpy(&size,xb + pos,sizeof(int));
++		else
++			size = 0;
++	}
++	return pos;
++}
++
++int nval_del(char *xb, int xb_size, const YCHAR *name)
++{
++	int pos  = nval_find(xb, xb_size, name, NULL);
++	int size;
++	
++	if(pos >= 0 && pos < xb_size){
++		/* Find size, shift rest over this record, then zero out the rest of buffer */
++		memcpy(&size,xb+pos,sizeof(int));
++		memcpy(xb + pos, xb + pos + size, xb_size - (pos + size));
++		memset(xb + (xb_size - size),0,size);
++		return 0;
++	} else
++		return -ENODATA;
++}
++
++int nval_set(char *xb, int xb_size, const YCHAR *name, const char *buf, int bsize, int flags)
++{
++	int pos;
++	int namelen = yaffs_strnlen(name,xb_size);
++	int reclen;
++	int size_exist = 0;
++	int space;
++	int start;
++
++	pos = nval_find(xb,xb_size,name, &size_exist);
++
++	if(flags & XATTR_CREATE && pos >= 0)
++		return -EEXIST;
++	if(flags & XATTR_REPLACE && pos < 0)
++		return -ENODATA;
++
++	start = nval_used(xb,xb_size);
++	space = xb_size - start + size_exist;
++
++	reclen = (sizeof(int) + namelen + 1 + bsize);
++
++	if(reclen > space)
++		return -ENOSPC;
++
++	if(pos >= 0){
++		nval_del(xb,xb_size,name);
++		start = nval_used(xb, xb_size);
++	}
++
++	pos = start;
++
++	memcpy(xb + pos,&reclen,sizeof(int));
++	pos +=sizeof(int);
++	yaffs_strncpy((YCHAR *)(xb + pos), name, reclen);
++	pos+= (namelen+1);
++	memcpy(xb + pos,buf,bsize);
++	return 0;
++}
++
++int nval_get(const char *xb, int xb_size, const YCHAR *name, char *buf, int bsize)
++{
++	int pos = nval_find(xb,xb_size,name,NULL);
++	int size;
++	
++	if(pos >= 0 && pos< xb_size){
++		
++		memcpy(&size,xb +pos,sizeof(int));
++		pos+=sizeof(int); /* advance past record length */
++		size -= sizeof(int);
++
++		/* Advance over name string */
++		while(xb[pos] && size > 0 && pos < xb_size){
++			pos++;
++			size--;
++		}
++		/*Advance over NUL */
++		pos++;
++		size--;
++
++		if(size <= bsize){
++			memcpy(buf,xb + pos,size);
++			return size;
++		}
++		
++	}
++	if(pos >= 0)
++		return -ERANGE;
++	else
++		return -ENODATA;
++}
++
++int nval_list(const char *xb, int xb_size, char *buf, int bsize)
++{
++	int pos = 0;
++	int size;
++	int name_len;
++	int ncopied = 0;
++	int filled = 0;
++
++	memcpy(&size,xb + pos,sizeof(int));
++	while(size > sizeof(int) && size <= xb_size && (pos + size) < xb_size && !filled){
++		pos+= sizeof(int);
++		size-=sizeof(int);
++		name_len = yaffs_strnlen((YCHAR *)(xb + pos), size);
++		if(ncopied + name_len + 1 < bsize){
++			memcpy(buf,xb+pos,name_len * sizeof(YCHAR));
++			buf+= name_len;
++			*buf = '\0';
++			buf++;
++			if(sizeof(YCHAR) > 1){
++				*buf = '\0';
++				buf++;
++			}
++			ncopied += (name_len+1);
++		} else
++			filled = 1;
++		pos+=size;
++		if(pos < xb_size -sizeof(int))
++			memcpy(&size,xb + pos,sizeof(int));
++		else
++			size = 0;
++	}
++	return ncopied;
++}
++
++
++int nval_hasvalues(const char *xb, int xb_size)
++{
++	return nval_used(xb, xb_size) > 0;
++}
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffs_nameval.h linux-2.6.36-rc8.new/fs/yaffs2/yaffs_nameval.h
+--- linux-2.6.36-rc8/fs/yaffs2/yaffs_nameval.h	1970-01-01 02:00:00.000000000 +0200
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffs_nameval.h	2010-10-20 13:28:16.062000294 +0300
+@@ -0,0 +1,25 @@
++/*
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2010 Aleph One Ltd.
++ *   for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ */
++#ifndef __NAMEVAL_H__
++#define __NAMEVAL_H__
++
++#include "yportenv.h"
++
++int nval_del(char *xb, int xb_size, const YCHAR *name);
++int nval_set(char *xb, int xb_size, const YCHAR *name, const char *buf, int bsize, int flags);
++int nval_get(const char *xb, int xb_size, const YCHAR *name, char *buf, int bsize);
++int nval_list(const char *xb, int xb_size, char *buf, int bsize);
++int nval_hasvalues(const char *xb, int xb_size);
++#endif
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffs_nand.c linux-2.6.36-rc8.new/fs/yaffs2/yaffs_nand.c
+--- linux-2.6.36-rc8/fs/yaffs2/yaffs_nand.c	2010-10-20 13:17:58.959000294 +0300
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffs_nand.c	2010-10-20 13:28:16.029000294 +0300
+@@ -1,7 +1,7 @@
+ /*
+  * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+  *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+  *   for Toby Churchill Ltd and Brightstar Engineering
+  *
+  * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -11,124 +11,129 @@
+  * published by the Free Software Foundation.
+  */
+ 
+-const char *yaffs_nand_c_version =
+-	"$Id: yaffs_nand.c,v 1.10 2009-03-06 17:20:54 wookey Exp $";
+-
+ #include "yaffs_nand.h"
+ #include "yaffs_tagscompat.h"
+ #include "yaffs_tagsvalidity.h"
+ 
+ #include "yaffs_getblockinfo.h"
+ 
+-int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device *dev, int chunkInNAND,
++int yaffs_rd_chunk_tags_nand(yaffs_dev_t *dev, int nand_chunk,
+ 					   __u8 *buffer,
+-					   yaffs_ExtendedTags *tags)
++					   yaffs_ext_tags *tags)
+ {
+ 	int result;
+-	yaffs_ExtendedTags localTags;
++	yaffs_ext_tags localTags;
++
++	int realignedChunkInNAND = nand_chunk - dev->chunk_offset;
+ 
+-	int realignedChunkInNAND = chunkInNAND - dev->chunkOffset;
++	dev->n_page_reads++;
+ 
+ 	/* If there are no tags provided, use local tags to get prioritised gc working */
+ 	if (!tags)
+ 		tags = &localTags;
+ 
+-	if (dev->readChunkWithTagsFromNAND)
+-		result = dev->readChunkWithTagsFromNAND(dev, realignedChunkInNAND, buffer,
++	if (dev->param.read_chunk_tags_fn)
++		result = dev->param.read_chunk_tags_fn(dev, realignedChunkInNAND, buffer,
+ 						      tags);
+ 	else
+-		result = yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(dev,
++		result = yaffs_tags_compat_rd(dev,
+ 									realignedChunkInNAND,
+ 									buffer,
+ 									tags);
+ 	if (tags &&
+-	   tags->eccResult > YAFFS_ECC_RESULT_NO_ERROR) {
++	   tags->ecc_result > YAFFS_ECC_RESULT_NO_ERROR) {
+ 
+-		yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, chunkInNAND/dev->nChunksPerBlock);
+-		yaffs_HandleChunkError(dev, bi);
++		yaffs_block_info_t *bi;
++		bi = yaffs_get_block_info(dev, nand_chunk/dev->param.chunks_per_block);
++		yaffs_handle_chunk_error(dev, bi);
+ 	}
+ 
+ 	return result;
+ }
+ 
+-int yaffs_WriteChunkWithTagsToNAND(yaffs_Device *dev,
+-						   int chunkInNAND,
++int yaffs_wr_chunk_tags_nand(yaffs_dev_t *dev,
++						   int nand_chunk,
+ 						   const __u8 *buffer,
+-						   yaffs_ExtendedTags *tags)
++						   yaffs_ext_tags *tags)
+ {
+-	chunkInNAND -= dev->chunkOffset;
++
++	dev->n_page_writes++;
++
++	nand_chunk -= dev->chunk_offset;
+ 
+ 
+ 	if (tags) {
+-		tags->sequenceNumber = dev->sequenceNumber;
+-		tags->chunkUsed = 1;
+-		if (!yaffs_ValidateTags(tags)) {
++		tags->seq_number = dev->seq_number;
++		tags->chunk_used = 1;
++		if (!yaffs_validate_tags(tags)) {
+ 			T(YAFFS_TRACE_ERROR,
+ 			  (TSTR("Writing uninitialised tags" TENDSTR)));
+ 			YBUG();
+ 		}
+ 		T(YAFFS_TRACE_WRITE,
+-		  (TSTR("Writing chunk %d tags %d %d" TENDSTR), chunkInNAND,
+-		   tags->objectId, tags->chunkId));
++		  (TSTR("Writing chunk %d tags %d %d" TENDSTR), nand_chunk,
++		   tags->obj_id, tags->chunk_id));
+ 	} else {
+ 		T(YAFFS_TRACE_ERROR, (TSTR("Writing with no tags" TENDSTR)));
+ 		YBUG();
+ 	}
+ 
+-	if (dev->writeChunkWithTagsToNAND)
+-		return dev->writeChunkWithTagsToNAND(dev, chunkInNAND, buffer,
++	if (dev->param.write_chunk_tags_fn)
++		return dev->param.write_chunk_tags_fn(dev, nand_chunk, buffer,
+ 						     tags);
+ 	else
+-		return yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(dev,
+-								       chunkInNAND,
++		return yaffs_tags_compat_wr(dev,
++								       nand_chunk,
+ 								       buffer,
+ 								       tags);
+ }
+ 
+-int yaffs_MarkBlockBad(yaffs_Device *dev, int blockNo)
++int yaffs_mark_bad(yaffs_dev_t *dev, int block_no)
+ {
+-	blockNo -= dev->blockOffset;
++	block_no -= dev->block_offset;
++
+ 
+-;
+-	if (dev->markNANDBlockBad)
+-		return dev->markNANDBlockBad(dev, blockNo);
++	if (dev->param.bad_block_fn)
++		return dev->param.bad_block_fn(dev, block_no);
+ 	else
+-		return yaffs_TagsCompatabilityMarkNANDBlockBad(dev, blockNo);
++		return yaffs_tags_compat_mark_bad(dev, block_no);
+ }
+ 
+-int yaffs_QueryInitialBlockState(yaffs_Device *dev,
+-						 int blockNo,
+-						 yaffs_BlockState *state,
+-						 __u32 *sequenceNumber)
++int yaffs_query_init_block_state(yaffs_dev_t *dev,
++						 int block_no,
++						 yaffs_block_state_t *state,
++						 __u32 *seq_number)
+ {
+-	blockNo -= dev->blockOffset;
++	block_no -= dev->block_offset;
+ 
+-	if (dev->queryNANDBlock)
+-		return dev->queryNANDBlock(dev, blockNo, state, sequenceNumber);
++	if (dev->param.query_block_fn)
++		return dev->param.query_block_fn(dev, block_no, state, seq_number);
+ 	else
+-		return yaffs_TagsCompatabilityQueryNANDBlock(dev, blockNo,
++		return yaffs_tags_compat_query_block(dev, block_no,
+ 							     state,
+-							     sequenceNumber);
++							     seq_number);
+ }
+ 
+ 
+-int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev,
+-				  int blockInNAND)
++int yaffs_erase_block(struct yaffs_dev_s *dev,
++				  int flash_block)
+ {
+ 	int result;
+ 
+-	blockInNAND -= dev->blockOffset;
++	flash_block -= dev->block_offset;
+ 
++	dev->n_erasures++;
+ 
+-	dev->nBlockErasures++;
+-	result = dev->eraseBlockInNAND(dev, blockInNAND);
++	result = dev->param.erase_fn(dev, flash_block);
+ 
+ 	return result;
+ }
+ 
+-int yaffs_InitialiseNAND(struct yaffs_DeviceStruct *dev)
++int yaffs_init_nand(struct yaffs_dev_s *dev)
+ {
+-	return dev->initialiseNAND(dev);
++	if(dev->param.initialise_flash_fn)
++		return dev->param.initialise_flash_fn(dev);
++	return YAFFS_OK;
+ }
+ 
+ 
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffs_nandemul2k.h linux-2.6.36-rc8.new/fs/yaffs2/yaffs_nandemul2k.h
+--- linux-2.6.36-rc8/fs/yaffs2/yaffs_nandemul2k.h	2010-10-20 13:17:58.959000294 +0300
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffs_nandemul2k.h	2010-10-20 13:28:16.063000294 +0300
+@@ -1,7 +1,7 @@
+ /*
+  * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+  *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+  *   for Toby Churchill Ltd and Brightstar Engineering
+  *
+  * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -20,18 +20,18 @@
+ 
+ #include "yaffs_guts.h"
+ 
+-int nandemul2k_WriteChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev,
+-					int chunkInNAND, const __u8 *data,
+-					const yaffs_ExtendedTags *tags);
+-int nandemul2k_ReadChunkWithTagsFromNAND(struct yaffs_DeviceStruct *dev,
+-					 int chunkInNAND, __u8 *data,
+-					 yaffs_ExtendedTags *tags);
+-int nandemul2k_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo);
+-int nandemul2k_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
+-			      yaffs_BlockState *state, __u32 *sequenceNumber);
+-int nandemul2k_EraseBlockInNAND(struct yaffs_DeviceStruct *dev,
+-				int blockInNAND);
+-int nandemul2k_InitialiseNAND(struct yaffs_DeviceStruct *dev);
++int nandemul2k_WriteChunkWithTagsToNAND(struct yaffs_dev_s *dev,
++					int nand_chunk, const __u8 *data,
++					const yaffs_ext_tags *tags);
++int nandemul2k_ReadChunkWithTagsFromNAND(struct yaffs_dev_s *dev,
++					 int nand_chunk, __u8 *data,
++					 yaffs_ext_tags *tags);
++int nandemul2k_MarkNANDBlockBad(struct yaffs_dev_s *dev, int block_no);
++int nandemul2k_QueryNANDBlock(struct yaffs_dev_s *dev, int block_no,
++			      yaffs_block_state_t *state, __u32 *seq_number);
++int nandemul2k_EraseBlockInNAND(struct yaffs_dev_s *dev,
++				int flash_block);
++int nandemul2k_InitialiseNAND(struct yaffs_dev_s *dev);
+ int nandemul2k_GetBytesPerChunk(void);
+ int nandemul2k_GetChunksPerBlock(void);
+ int nandemul2k_GetNumberOfBlocks(void);
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffs_nand.h linux-2.6.36-rc8.new/fs/yaffs2/yaffs_nand.h
+--- linux-2.6.36-rc8/fs/yaffs2/yaffs_nand.h	2010-10-20 13:17:58.959000294 +0300
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffs_nand.h	2010-10-20 13:28:16.063000294 +0300
+@@ -1,7 +1,7 @@
+ /*
+  * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+  *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+  *   for Toby Churchill Ltd and Brightstar Engineering
+  *
+  * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -19,26 +19,26 @@
+ 
+ 
+ 
+-int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device *dev, int chunkInNAND,
++int yaffs_rd_chunk_tags_nand(yaffs_dev_t *dev, int nand_chunk,
+ 					__u8 *buffer,
+-					yaffs_ExtendedTags *tags);
++					yaffs_ext_tags *tags);
+ 
+-int yaffs_WriteChunkWithTagsToNAND(yaffs_Device *dev,
+-						int chunkInNAND,
++int yaffs_wr_chunk_tags_nand(yaffs_dev_t *dev,
++						int nand_chunk,
+ 						const __u8 *buffer,
+-						yaffs_ExtendedTags *tags);
++						yaffs_ext_tags *tags);
+ 
+-int yaffs_MarkBlockBad(yaffs_Device *dev, int blockNo);
++int yaffs_mark_bad(yaffs_dev_t *dev, int block_no);
+ 
+-int yaffs_QueryInitialBlockState(yaffs_Device *dev,
+-						int blockNo,
+-						yaffs_BlockState *state,
+-						unsigned *sequenceNumber);
++int yaffs_query_init_block_state(yaffs_dev_t *dev,
++						int block_no,
++						yaffs_block_state_t *state,
++						unsigned *seq_number);
+ 
+-int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev,
+-				  int blockInNAND);
++int yaffs_erase_block(struct yaffs_dev_s *dev,
++				  int flash_block);
+ 
+-int yaffs_InitialiseNAND(struct yaffs_DeviceStruct *dev);
++int yaffs_init_nand(struct yaffs_dev_s *dev);
+ 
+ #endif
+ 
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffs_packedtags1.c linux-2.6.36-rc8.new/fs/yaffs2/yaffs_packedtags1.c
+--- linux-2.6.36-rc8/fs/yaffs2/yaffs_packedtags1.c	2010-10-20 13:17:58.959000294 +0300
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffs_packedtags1.c	2010-10-20 13:28:16.029000294 +0300
+@@ -1,7 +1,7 @@
+ /*
+  * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+  *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+  *   for Toby Churchill Ltd and Brightstar Engineering
+  *
+  * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -14,37 +14,37 @@
+ #include "yaffs_packedtags1.h"
+ #include "yportenv.h"
+ 
+-void yaffs_PackTags1(yaffs_PackedTags1 *pt, const yaffs_ExtendedTags *t)
++void yaffs_PackTags1(yaffs_PackedTags1 *pt, const yaffs_ext_tags *t)
+ {
+-	pt->chunkId = t->chunkId;
+-	pt->serialNumber = t->serialNumber;
+-	pt->byteCount = t->byteCount;
+-	pt->objectId = t->objectId;
++	pt->chunk_id = t->chunk_id;
++	pt->serial_number = t->serial_number;
++	pt->n_bytes = t->n_bytes;
++	pt->obj_id = t->obj_id;
+ 	pt->ecc = 0;
+-	pt->deleted = (t->chunkDeleted) ? 0 : 1;
++	pt->deleted = (t->is_deleted) ? 0 : 1;
+ 	pt->unusedStuff = 0;
+ 	pt->shouldBeFF = 0xFFFFFFFF;
+ 
+ }
+ 
+-void yaffs_UnpackTags1(yaffs_ExtendedTags *t, const yaffs_PackedTags1 *pt)
++void yaffs_unpack_tags1(yaffs_ext_tags *t, const yaffs_PackedTags1 *pt)
+ {
+ 	static const __u8 allFF[] =
+ 	    { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+ 0xff };
+ 
+ 	if (memcmp(allFF, pt, sizeof(yaffs_PackedTags1))) {
+-		t->blockBad = 0;
++		t->block_bad = 0;
+ 		if (pt->shouldBeFF != 0xFFFFFFFF)
+-			t->blockBad = 1;
+-		t->chunkUsed = 1;
+-		t->objectId = pt->objectId;
+-		t->chunkId = pt->chunkId;
+-		t->byteCount = pt->byteCount;
+-		t->eccResult = YAFFS_ECC_RESULT_NO_ERROR;
+-		t->chunkDeleted = (pt->deleted) ? 0 : 1;
+-		t->serialNumber = pt->serialNumber;
++			t->block_bad = 1;
++		t->chunk_used = 1;
++		t->obj_id = pt->obj_id;
++		t->chunk_id = pt->chunk_id;
++		t->n_bytes = pt->n_bytes;
++		t->ecc_result = YAFFS_ECC_RESULT_NO_ERROR;
++		t->is_deleted = (pt->deleted) ? 0 : 1;
++		t->serial_number = pt->serial_number;
+ 	} else {
+-		memset(t, 0, sizeof(yaffs_ExtendedTags));
++		memset(t, 0, sizeof(yaffs_ext_tags));
+ 	}
+ }
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffs_packedtags1.h linux-2.6.36-rc8.new/fs/yaffs2/yaffs_packedtags1.h
+--- linux-2.6.36-rc8/fs/yaffs2/yaffs_packedtags1.h	2010-10-20 13:17:58.960000294 +0300
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffs_packedtags1.h	2010-10-20 13:28:16.063000294 +0300
+@@ -1,7 +1,7 @@
+ /*
+  * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+  *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+  *   for Toby Churchill Ltd and Brightstar Engineering
+  *
+  * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -21,10 +21,10 @@
+ #include "yaffs_guts.h"
+ 
+ typedef struct {
+-	unsigned chunkId:20;
+-	unsigned serialNumber:2;
+-	unsigned byteCount:10;
+-	unsigned objectId:18;
++	unsigned chunk_id:20;
++	unsigned serial_number:2;
++	unsigned n_bytes:10;
++	unsigned obj_id:18;
+ 	unsigned ecc:12;
+ 	unsigned deleted:1;
+ 	unsigned unusedStuff:1;
+@@ -32,6 +32,6 @@ typedef struct {
+ 
+ } yaffs_PackedTags1;
+ 
+-void yaffs_PackTags1(yaffs_PackedTags1 *pt, const yaffs_ExtendedTags *t);
+-void yaffs_UnpackTags1(yaffs_ExtendedTags *t, const yaffs_PackedTags1 *pt);
++void yaffs_PackTags1(yaffs_PackedTags1 *pt, const yaffs_ext_tags *t);
++void yaffs_unpack_tags1(yaffs_ext_tags *t, const yaffs_PackedTags1 *pt);
+ #endif
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffs_packedtags2.c linux-2.6.36-rc8.new/fs/yaffs2/yaffs_packedtags2.c
+--- linux-2.6.36-rc8/fs/yaffs2/yaffs_packedtags2.c	2010-10-20 13:17:58.960000294 +0300
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffs_packedtags2.c	2010-10-20 13:28:16.029000294 +0300
+@@ -1,7 +1,7 @@
+ /*
+  * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+  *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+  *   for Toby Churchill Ltd and Brightstar Engineering
+  *
+  * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -13,6 +13,7 @@
+ 
+ #include "yaffs_packedtags2.h"
+ #include "yportenv.h"
++#include "yaffs_trace.h"
+ #include "yaffs_tagsvalidity.h"
+ 
+ /* This code packs a set of extended tags into a binary structure for
+@@ -24,7 +25,7 @@
+  * This is defined by having the EXTRA_HEADER_INFO_FLAG set.
+  */
+ 
+-/* Extra flags applied to chunkId */
++/* Extra flags applied to chunk_id */
+ 
+ #define EXTRA_HEADER_INFO_FLAG	0x80000000
+ #define EXTRA_SHRINK_FLAG	0x40000000
+@@ -42,53 +43,53 @@ static void yaffs_DumpPackedTags2TagsPar
+ {
+ 	T(YAFFS_TRACE_MTD,
+ 	  (TSTR("packed tags obj %d chunk %d byte %d seq %d" TENDSTR),
+-	   ptt->objectId, ptt->chunkId, ptt->byteCount,
+-	   ptt->sequenceNumber));
++	   ptt->obj_id, ptt->chunk_id, ptt->n_bytes,
++	   ptt->seq_number));
+ }
+ static void yaffs_DumpPackedTags2(const yaffs_PackedTags2 *pt)
+ {
+ 	yaffs_DumpPackedTags2TagsPart(&pt->t);
+ }
+ 
+-static void yaffs_DumpTags2(const yaffs_ExtendedTags *t)
++static void yaffs_DumpTags2(const yaffs_ext_tags *t)
+ {
+ 	T(YAFFS_TRACE_MTD,
+ 	  (TSTR
+ 	   ("ext.tags eccres %d blkbad %d chused %d obj %d chunk%d byte %d del %d ser %d seq %d"
+-	    TENDSTR), t->eccResult, t->blockBad, t->chunkUsed, t->objectId,
+-	   t->chunkId, t->byteCount, t->chunkDeleted, t->serialNumber,
+-	   t->sequenceNumber));
++	    TENDSTR), t->ecc_result, t->block_bad, t->chunk_used, t->obj_id,
++	   t->chunk_id, t->n_bytes, t->is_deleted, t->serial_number,
++	   t->seq_number));
+ 
+ }
+ 
+ void yaffs_PackTags2TagsPart(yaffs_PackedTags2TagsPart *ptt,
+-		const yaffs_ExtendedTags *t)
++		const yaffs_ext_tags *t)
+ {
+-	ptt->chunkId = t->chunkId;
+-	ptt->sequenceNumber = t->sequenceNumber;
+-	ptt->byteCount = t->byteCount;
+-	ptt->objectId = t->objectId;
++	ptt->chunk_id = t->chunk_id;
++	ptt->seq_number = t->seq_number;
++	ptt->n_bytes = t->n_bytes;
++	ptt->obj_id = t->obj_id;
+ 
+-	if (t->chunkId == 0 && t->extraHeaderInfoAvailable) {
++	if (t->chunk_id == 0 && t->extra_available) {
+ 		/* Store the extra header info instead */
+-		/* We save the parent object in the chunkId */
+-		ptt->chunkId = EXTRA_HEADER_INFO_FLAG
+-			| t->extraParentObjectId;
+-		if (t->extraIsShrinkHeader)
+-			ptt->chunkId |= EXTRA_SHRINK_FLAG;
+-		if (t->extraShadows)
+-			ptt->chunkId |= EXTRA_SHADOWS_FLAG;
+-
+-		ptt->objectId &= ~EXTRA_OBJECT_TYPE_MASK;
+-		ptt->objectId |=
+-		    (t->extraObjectType << EXTRA_OBJECT_TYPE_SHIFT);
+-
+-		if (t->extraObjectType == YAFFS_OBJECT_TYPE_HARDLINK)
+-			ptt->byteCount = t->extraEquivalentObjectId;
+-		else if (t->extraObjectType == YAFFS_OBJECT_TYPE_FILE)
+-			ptt->byteCount = t->extraFileLength;
++		/* We save the parent object in the chunk_id */
++		ptt->chunk_id = EXTRA_HEADER_INFO_FLAG
++			| t->extra_parent_id;
++		if (t->extra_is_shrink)
++			ptt->chunk_id |= EXTRA_SHRINK_FLAG;
++		if (t->extra_shadows)
++			ptt->chunk_id |= EXTRA_SHADOWS_FLAG;
++
++		ptt->obj_id &= ~EXTRA_OBJECT_TYPE_MASK;
++		ptt->obj_id |=
++		    (t->extra_obj_type << EXTRA_OBJECT_TYPE_SHIFT);
++
++		if (t->extra_obj_type == YAFFS_OBJECT_TYPE_HARDLINK)
++			ptt->n_bytes = t->extra_equiv_id;
++		else if (t->extra_obj_type == YAFFS_OBJECT_TYPE_FILE)
++			ptt->n_bytes = t->extra_length;
+ 		else
+-			ptt->byteCount = 0;
++			ptt->n_bytes = 0;
+ 	}
+ 
+ 	yaffs_DumpPackedTags2TagsPart(ptt);
+@@ -96,59 +97,56 @@ void yaffs_PackTags2TagsPart(yaffs_Packe
+ }
+ 
+ 
+-void yaffs_PackTags2(yaffs_PackedTags2 *pt, const yaffs_ExtendedTags *t)
++void yaffs_PackTags2(yaffs_PackedTags2 *pt, const yaffs_ext_tags *t, int tagsECC)
+ {
+ 	yaffs_PackTags2TagsPart(&pt->t, t);
+ 
+-#ifndef YAFFS_IGNORE_TAGS_ECC
+-	{
+-		yaffs_ECCCalculateOther((unsigned char *)&pt->t,
++	if(tagsECC)
++		yaffs_ecc_calc_other((unsigned char *)&pt->t,
+ 					sizeof(yaffs_PackedTags2TagsPart),
+ 					&pt->ecc);
+-	}
+-#endif
+ }
+ 
+ 
+-void yaffs_UnpackTags2TagsPart(yaffs_ExtendedTags *t,
++void yaffs_unpack_tags2tags_part(yaffs_ext_tags *t,
+ 		yaffs_PackedTags2TagsPart *ptt)
+ {
+ 
+-	memset(t, 0, sizeof(yaffs_ExtendedTags));
++	memset(t, 0, sizeof(yaffs_ext_tags));
+ 
+-	yaffs_InitialiseTags(t);
++	yaffs_init_tags(t);
+ 
+-	if (ptt->sequenceNumber != 0xFFFFFFFF) {
+-		t->blockBad = 0;
+-		t->chunkUsed = 1;
+-		t->objectId = ptt->objectId;
+-		t->chunkId = ptt->chunkId;
+-		t->byteCount = ptt->byteCount;
+-		t->chunkDeleted = 0;
+-		t->serialNumber = 0;
+-		t->sequenceNumber = ptt->sequenceNumber;
++	if (ptt->seq_number != 0xFFFFFFFF) {
++		t->block_bad = 0;
++		t->chunk_used = 1;
++		t->obj_id = ptt->obj_id;
++		t->chunk_id = ptt->chunk_id;
++		t->n_bytes = ptt->n_bytes;
++		t->is_deleted = 0;
++		t->serial_number = 0;
++		t->seq_number = ptt->seq_number;
+ 
+ 		/* Do extra header info stuff */
+ 
+-		if (ptt->chunkId & EXTRA_HEADER_INFO_FLAG) {
+-			t->chunkId = 0;
+-			t->byteCount = 0;
+-
+-			t->extraHeaderInfoAvailable = 1;
+-			t->extraParentObjectId =
+-			    ptt->chunkId & (~(ALL_EXTRA_FLAGS));
+-			t->extraIsShrinkHeader =
+-			    (ptt->chunkId & EXTRA_SHRINK_FLAG) ? 1 : 0;
+-			t->extraShadows =
+-			    (ptt->chunkId & EXTRA_SHADOWS_FLAG) ? 1 : 0;
+-			t->extraObjectType =
+-			    ptt->objectId >> EXTRA_OBJECT_TYPE_SHIFT;
+-			t->objectId &= ~EXTRA_OBJECT_TYPE_MASK;
++		if (ptt->chunk_id & EXTRA_HEADER_INFO_FLAG) {
++			t->chunk_id = 0;
++			t->n_bytes = 0;
++
++			t->extra_available = 1;
++			t->extra_parent_id =
++			    ptt->chunk_id & (~(ALL_EXTRA_FLAGS));
++			t->extra_is_shrink =
++			    (ptt->chunk_id & EXTRA_SHRINK_FLAG) ? 1 : 0;
++			t->extra_shadows =
++			    (ptt->chunk_id & EXTRA_SHADOWS_FLAG) ? 1 : 0;
++			t->extra_obj_type =
++			    ptt->obj_id >> EXTRA_OBJECT_TYPE_SHIFT;
++			t->obj_id &= ~EXTRA_OBJECT_TYPE_MASK;
+ 
+-			if (t->extraObjectType == YAFFS_OBJECT_TYPE_HARDLINK)
+-				t->extraEquivalentObjectId = ptt->byteCount;
++			if (t->extra_obj_type == YAFFS_OBJECT_TYPE_HARDLINK)
++				t->extra_equiv_id = ptt->n_bytes;
+ 			else
+-				t->extraFileLength = ptt->byteCount;
++				t->extra_length = ptt->n_bytes;
+ 		}
+ 	}
+ 
+@@ -158,49 +156,43 @@ void yaffs_UnpackTags2TagsPart(yaffs_Ext
+ }
+ 
+ 
+-void yaffs_UnpackTags2(yaffs_ExtendedTags *t, yaffs_PackedTags2 *pt)
++void yaffs_unpack_tags2(yaffs_ext_tags *t, yaffs_PackedTags2 *pt, int tagsECC)
+ {
+ 
+-	yaffs_ECCResult eccResult = YAFFS_ECC_RESULT_NO_ERROR;
++	yaffs_ecc_result ecc_result = YAFFS_ECC_RESULT_NO_ERROR;
+ 
+-	if (pt->t.sequenceNumber != 0xFFFFFFFF) {
+-		/* Page is in use */
+-#ifndef YAFFS_IGNORE_TAGS_ECC
+-		{
+-			yaffs_ECCOther ecc;
+-			int result;
+-			yaffs_ECCCalculateOther((unsigned char *)&pt->t,
+-						sizeof
+-						(yaffs_PackedTags2TagsPart),
+-						&ecc);
+-			result =
+-			    yaffs_ECCCorrectOther((unsigned char *)&pt->t,
+-						  sizeof
+-						  (yaffs_PackedTags2TagsPart),
+-						  &pt->ecc, &ecc);
+-			switch (result) {
++	if (pt->t.seq_number != 0xFFFFFFFF &&
++	    tagsECC){
++		/* Chunk is in use and we need to do ECC */
++		
++		yaffs_ECCOther ecc;
++		int result;
++		yaffs_ecc_calc_other((unsigned char *)&pt->t,
++					sizeof(yaffs_PackedTags2TagsPart),
++					&ecc);
++		result = yaffs_ecc_correct_other((unsigned char *)&pt->t,
++						sizeof(yaffs_PackedTags2TagsPart),
++						&pt->ecc, &ecc);
++		switch (result) {
+ 			case 0:
+-				eccResult = YAFFS_ECC_RESULT_NO_ERROR;
++				ecc_result = YAFFS_ECC_RESULT_NO_ERROR;
+ 				break;
+ 			case 1:
+-				eccResult = YAFFS_ECC_RESULT_FIXED;
++				ecc_result = YAFFS_ECC_RESULT_FIXED;
+ 				break;
+ 			case -1:
+-				eccResult = YAFFS_ECC_RESULT_UNFIXED;
++				ecc_result = YAFFS_ECC_RESULT_UNFIXED;
+ 				break;
+ 			default:
+-				eccResult = YAFFS_ECC_RESULT_UNKNOWN;
+-			}
++				ecc_result = YAFFS_ECC_RESULT_UNKNOWN;
+ 		}
+-#endif
+ 	}
+ 
+-	yaffs_UnpackTags2TagsPart(t, &pt->t);
++	yaffs_unpack_tags2tags_part(t, &pt->t);
+ 
+-	t->eccResult = eccResult;
++	t->ecc_result = ecc_result;
+ 
+ 	yaffs_DumpPackedTags2(pt);
+ 	yaffs_DumpTags2(t);
+-
+ }
+ 
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffs_packedtags2.h linux-2.6.36-rc8.new/fs/yaffs2/yaffs_packedtags2.h
+--- linux-2.6.36-rc8/fs/yaffs2/yaffs_packedtags2.h	2010-10-20 13:17:58.960000294 +0300
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffs_packedtags2.h	2010-10-20 13:28:16.063000294 +0300
+@@ -1,7 +1,7 @@
+ /*
+  * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+  *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+  *   for Toby Churchill Ltd and Brightstar Engineering
+  *
+  * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -22,10 +22,10 @@
+ #include "yaffs_ecc.h"
+ 
+ typedef struct {
+-	unsigned sequenceNumber;
+-	unsigned objectId;
+-	unsigned chunkId;
+-	unsigned byteCount;
++	unsigned seq_number;
++	unsigned obj_id;
++	unsigned chunk_id;
++	unsigned n_bytes;
+ } yaffs_PackedTags2TagsPart;
+ 
+ typedef struct {
+@@ -34,10 +34,10 @@ typedef struct {
+ } yaffs_PackedTags2;
+ 
+ /* Full packed tags with ECC, used for oob tags */
+-void yaffs_PackTags2(yaffs_PackedTags2 *pt, const yaffs_ExtendedTags *t);
+-void yaffs_UnpackTags2(yaffs_ExtendedTags *t, yaffs_PackedTags2 *pt);
++void yaffs_PackTags2(yaffs_PackedTags2 *pt, const yaffs_ext_tags *t, int tagsECC);
++void yaffs_unpack_tags2(yaffs_ext_tags *t, yaffs_PackedTags2 *pt, int tagsECC);
+ 
+ /* Only the tags part (no ECC for use with inband tags */
+-void yaffs_PackTags2TagsPart(yaffs_PackedTags2TagsPart *pt, const yaffs_ExtendedTags *t);
+-void yaffs_UnpackTags2TagsPart(yaffs_ExtendedTags *t, yaffs_PackedTags2TagsPart *pt);
++void yaffs_PackTags2TagsPart(yaffs_PackedTags2TagsPart *pt, const yaffs_ext_tags *t);
++void yaffs_unpack_tags2tags_part(yaffs_ext_tags *t, yaffs_PackedTags2TagsPart *pt);
+ #endif
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffs_qsort.h linux-2.6.36-rc8.new/fs/yaffs2/yaffs_qsort.h
+--- linux-2.6.36-rc8/fs/yaffs2/yaffs_qsort.h	2010-10-20 13:17:58.961000294 +0300
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffs_qsort.h	2010-10-20 13:28:16.063000294 +0300
+@@ -1,7 +1,7 @@
+ /*
+  * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+  *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+  *   for Toby Churchill Ltd and Brightstar Engineering
+  *
+  * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -17,7 +17,18 @@
+ #ifndef __YAFFS_QSORT_H__
+ #define __YAFFS_QSORT_H__
+ 
++#ifdef __KERNEL__
++#include <linux/sort.h>
++
++extern void yaffs_qsort(void *const base, size_t total_elems, size_t size,
++			int (*cmp)(const void *, const void *)){
++	sort(base, total_elems, size, cmp, NULL);
++}
++
++#else
++
+ extern void yaffs_qsort(void *const base, size_t total_elems, size_t size,
+ 			int (*cmp)(const void *, const void *));
+ 
+ #endif
++#endif
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffs_tagscompat.c linux-2.6.36-rc8.new/fs/yaffs2/yaffs_tagscompat.c
+--- linux-2.6.36-rc8/fs/yaffs2/yaffs_tagscompat.c	2010-10-20 13:17:58.961000294 +0300
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffs_tagscompat.c	2010-10-20 13:28:16.030000294 +0300
+@@ -1,7 +1,7 @@
+ /*
+  * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+  *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+  *   for Toby Churchill Ltd and Brightstar Engineering
+  *
+  * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -15,19 +15,20 @@
+ #include "yaffs_tagscompat.h"
+ #include "yaffs_ecc.h"
+ #include "yaffs_getblockinfo.h"
++#include "yaffs_trace.h"
+ 
+-static void yaffs_HandleReadDataError(yaffs_Device *dev, int chunkInNAND);
++static void yaffs_handle_rd_data_error(yaffs_dev_t *dev, int nand_chunk);
+ #ifdef NOTYET
+-static void yaffs_CheckWrittenBlock(yaffs_Device *dev, int chunkInNAND);
+-static void yaffs_HandleWriteChunkOk(yaffs_Device *dev, int chunkInNAND,
++static void yaffs_check_written_block(yaffs_dev_t *dev, int nand_chunk);
++static void yaffs_handle_chunk_wr_ok(yaffs_dev_t *dev, int nand_chunk,
+ 				     const __u8 *data,
+-				     const yaffs_Spare *spare);
+-static void yaffs_HandleUpdateChunk(yaffs_Device *dev, int chunkInNAND,
+-				    const yaffs_Spare *spare);
+-static void yaffs_HandleWriteChunkError(yaffs_Device *dev, int chunkInNAND);
++				     const yaffs_spare *spare);
++static void yaffs_handle_chunk_update(yaffs_dev_t *dev, int nand_chunk,
++				    const yaffs_spare *spare);
++static void yaffs_handle_chunk_wr_error(yaffs_dev_t *dev, int nand_chunk);
+ #endif
+ 
+-static const char yaffs_countBitsTable[256] = {
++static const char yaffs_count_bits_table[256] = {
+ 	0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4,
+ 	1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5,
+ 	1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5,
+@@ -46,26 +47,26 @@ static const char yaffs_countBitsTable[2
+ 	4, 5, 5, 6, 5, 6, 6, 7, 5, 6, 6, 7, 6, 7, 7, 8
+ };
+ 
+-int yaffs_CountBits(__u8 x)
++int yaffs_count_bits(__u8 x)
+ {
+ 	int retVal;
+-	retVal = yaffs_countBitsTable[x];
++	retVal = yaffs_count_bits_table[x];
+ 	return retVal;
+ }
+ 
+ /********** Tags ECC calculations  *********/
+ 
+-void yaffs_CalcECC(const __u8 *data, yaffs_Spare *spare)
++void yaffs_calc_ecc(const __u8 *data, yaffs_spare *spare)
+ {
+-	yaffs_ECCCalculate(data, spare->ecc1);
+-	yaffs_ECCCalculate(&data[256], spare->ecc2);
++	yaffs_ecc_cacl(data, spare->ecc1);
++	yaffs_ecc_cacl(&data[256], spare->ecc2);
+ }
+ 
+-void yaffs_CalcTagsECC(yaffs_Tags *tags)
++void yaffs_calc_tags_ecc(yaffs_tags_t *tags)
+ {
+ 	/* Calculate an ecc */
+ 
+-	unsigned char *b = ((yaffs_TagsUnion *) tags)->asBytes;
++	unsigned char *b = ((yaffs_tags_union_t *) tags)->as_bytes;
+ 	unsigned i, j;
+ 	unsigned ecc = 0;
+ 	unsigned bit = 0;
+@@ -84,24 +85,24 @@ void yaffs_CalcTagsECC(yaffs_Tags *tags)
+ 
+ }
+ 
+-int yaffs_CheckECCOnTags(yaffs_Tags *tags)
++int yaffs_check_tags_ecc(yaffs_tags_t *tags)
+ {
+ 	unsigned ecc = tags->ecc;
+ 
+-	yaffs_CalcTagsECC(tags);
++	yaffs_calc_tags_ecc(tags);
+ 
+ 	ecc ^= tags->ecc;
+ 
+ 	if (ecc && ecc <= 64) {
+ 		/* TODO: Handle the failure better. Retire? */
+-		unsigned char *b = ((yaffs_TagsUnion *) tags)->asBytes;
++		unsigned char *b = ((yaffs_tags_union_t *) tags)->as_bytes;
+ 
+ 		ecc--;
+ 
+ 		b[ecc / 8] ^= (1 << (ecc & 7));
+ 
+ 		/* Now recvalc the ecc */
+-		yaffs_CalcTagsECC(tags);
++		yaffs_calc_tags_ecc(tags);
+ 
+ 		return 1;	/* recovered error */
+ 	} else if (ecc) {
+@@ -115,76 +116,73 @@ int yaffs_CheckECCOnTags(yaffs_Tags *tag
+ 
+ /********** Tags **********/
+ 
+-static void yaffs_LoadTagsIntoSpare(yaffs_Spare *sparePtr,
+-				yaffs_Tags *tagsPtr)
++static void yaffs_load_tags_to_spare(yaffs_spare *sparePtr,
++				yaffs_tags_t *tagsPtr)
+ {
+-	yaffs_TagsUnion *tu = (yaffs_TagsUnion *) tagsPtr;
++	yaffs_tags_union_t *tu = (yaffs_tags_union_t *) tagsPtr;
+ 
+-	yaffs_CalcTagsECC(tagsPtr);
++	yaffs_calc_tags_ecc(tagsPtr);
+ 
+-	sparePtr->tagByte0 = tu->asBytes[0];
+-	sparePtr->tagByte1 = tu->asBytes[1];
+-	sparePtr->tagByte2 = tu->asBytes[2];
+-	sparePtr->tagByte3 = tu->asBytes[3];
+-	sparePtr->tagByte4 = tu->asBytes[4];
+-	sparePtr->tagByte5 = tu->asBytes[5];
+-	sparePtr->tagByte6 = tu->asBytes[6];
+-	sparePtr->tagByte7 = tu->asBytes[7];
++	sparePtr->tb0 = tu->as_bytes[0];
++	sparePtr->tb1 = tu->as_bytes[1];
++	sparePtr->tb2 = tu->as_bytes[2];
++	sparePtr->tb3 = tu->as_bytes[3];
++	sparePtr->tb4 = tu->as_bytes[4];
++	sparePtr->tb5 = tu->as_bytes[5];
++	sparePtr->tb6 = tu->as_bytes[6];
++	sparePtr->tb7 = tu->as_bytes[7];
+ }
+ 
+-static void yaffs_GetTagsFromSpare(yaffs_Device *dev, yaffs_Spare *sparePtr,
+-				yaffs_Tags *tagsPtr)
++static void yaffs_get_tags_from_spare(yaffs_dev_t *dev, yaffs_spare *sparePtr,
++				yaffs_tags_t *tagsPtr)
+ {
+-	yaffs_TagsUnion *tu = (yaffs_TagsUnion *) tagsPtr;
++	yaffs_tags_union_t *tu = (yaffs_tags_union_t *) tagsPtr;
+ 	int result;
+ 
+-	tu->asBytes[0] = sparePtr->tagByte0;
+-	tu->asBytes[1] = sparePtr->tagByte1;
+-	tu->asBytes[2] = sparePtr->tagByte2;
+-	tu->asBytes[3] = sparePtr->tagByte3;
+-	tu->asBytes[4] = sparePtr->tagByte4;
+-	tu->asBytes[5] = sparePtr->tagByte5;
+-	tu->asBytes[6] = sparePtr->tagByte6;
+-	tu->asBytes[7] = sparePtr->tagByte7;
++	tu->as_bytes[0] = sparePtr->tb0;
++	tu->as_bytes[1] = sparePtr->tb1;
++	tu->as_bytes[2] = sparePtr->tb2;
++	tu->as_bytes[3] = sparePtr->tb3;
++	tu->as_bytes[4] = sparePtr->tb4;
++	tu->as_bytes[5] = sparePtr->tb5;
++	tu->as_bytes[6] = sparePtr->tb6;
++	tu->as_bytes[7] = sparePtr->tb7;
+ 
+-	result = yaffs_CheckECCOnTags(tagsPtr);
++	result = yaffs_check_tags_ecc(tagsPtr);
+ 	if (result > 0)
+-		dev->tagsEccFixed++;
++		dev->n_tags_ecc_fixed++;
+ 	else if (result < 0)
+-		dev->tagsEccUnfixed++;
++		dev->n_tags_ecc_unfixed++;
+ }
+ 
+-static void yaffs_SpareInitialise(yaffs_Spare *spare)
++static void yaffs_spare_init(yaffs_spare *spare)
+ {
+-	memset(spare, 0xFF, sizeof(yaffs_Spare));
++	memset(spare, 0xFF, sizeof(yaffs_spare));
+ }
+ 
+-static int yaffs_WriteChunkToNAND(struct yaffs_DeviceStruct *dev,
+-				int chunkInNAND, const __u8 *data,
+-				yaffs_Spare *spare)
++static int yaffs_wr_nand(struct yaffs_dev_s *dev,
++				int nand_chunk, const __u8 *data,
++				yaffs_spare *spare)
+ {
+-	if (chunkInNAND < dev->startBlock * dev->nChunksPerBlock) {
++	if (nand_chunk < dev->param.start_block * dev->param.chunks_per_block) {
+ 		T(YAFFS_TRACE_ERROR,
+ 		  (TSTR("**>> yaffs chunk %d is not valid" TENDSTR),
+-		   chunkInNAND));
++		   nand_chunk));
+ 		return YAFFS_FAIL;
+ 	}
+ 
+-	dev->nPageWrites++;
+-	return dev->writeChunkToNAND(dev, chunkInNAND, data, spare);
++	return dev->param.write_chunk_fn(dev, nand_chunk, data, spare);
+ }
+ 
+-static int yaffs_ReadChunkFromNAND(struct yaffs_DeviceStruct *dev,
+-				   int chunkInNAND,
++static int yaffs_rd_chunk_nand(struct yaffs_dev_s *dev,
++				   int nand_chunk,
+ 				   __u8 *data,
+-				   yaffs_Spare *spare,
+-				   yaffs_ECCResult *eccResult,
++				   yaffs_spare *spare,
++				   yaffs_ecc_result *ecc_result,
+ 				   int doErrorCorrection)
+ {
+ 	int retVal;
+-	yaffs_Spare localSpare;
+-
+-	dev->nPageReads++;
++	yaffs_spare localSpare;
+ 
+ 	if (!spare && data) {
+ 		/* If we don't have a real spare, then we use a local one. */
+@@ -192,107 +190,107 @@ static int yaffs_ReadChunkFromNAND(struc
+ 		spare = &localSpare;
+ 	}
+ 
+-	if (!dev->useNANDECC) {
+-		retVal = dev->readChunkFromNAND(dev, chunkInNAND, data, spare);
++	if (!dev->param.use_nand_ecc) {
++		retVal = dev->param.read_chunk_fn(dev, nand_chunk, data, spare);
+ 		if (data && doErrorCorrection) {
+ 			/* Do ECC correction */
+ 			/* Todo handle any errors */
+-			int eccResult1, eccResult2;
++			int ecc_result1, ecc_result2;
+ 			__u8 calcEcc[3];
+ 
+-			yaffs_ECCCalculate(data, calcEcc);
+-			eccResult1 =
+-			    yaffs_ECCCorrect(data, spare->ecc1, calcEcc);
+-			yaffs_ECCCalculate(&data[256], calcEcc);
+-			eccResult2 =
+-			    yaffs_ECCCorrect(&data[256], spare->ecc2, calcEcc);
++			yaffs_ecc_cacl(data, calcEcc);
++			ecc_result1 =
++			    yaffs_ecc_correct(data, spare->ecc1, calcEcc);
++			yaffs_ecc_cacl(&data[256], calcEcc);
++			ecc_result2 =
++			    yaffs_ecc_correct(&data[256], spare->ecc2, calcEcc);
+ 
+-			if (eccResult1 > 0) {
++			if (ecc_result1 > 0) {
+ 				T(YAFFS_TRACE_ERROR,
+ 				  (TSTR
+ 				   ("**>>yaffs ecc error fix performed on chunk %d:0"
+-				    TENDSTR), chunkInNAND));
+-				dev->eccFixed++;
+-			} else if (eccResult1 < 0) {
++				    TENDSTR), nand_chunk));
++				dev->n_ecc_fixed++;
++			} else if (ecc_result1 < 0) {
+ 				T(YAFFS_TRACE_ERROR,
+ 				  (TSTR
+ 				   ("**>>yaffs ecc error unfixed on chunk %d:0"
+-				    TENDSTR), chunkInNAND));
+-				dev->eccUnfixed++;
++				    TENDSTR), nand_chunk));
++				dev->n_ecc_unfixed++;
+ 			}
+ 
+-			if (eccResult2 > 0) {
++			if (ecc_result2 > 0) {
+ 				T(YAFFS_TRACE_ERROR,
+ 				  (TSTR
+ 				   ("**>>yaffs ecc error fix performed on chunk %d:1"
+-				    TENDSTR), chunkInNAND));
+-				dev->eccFixed++;
+-			} else if (eccResult2 < 0) {
++				    TENDSTR), nand_chunk));
++				dev->n_ecc_fixed++;
++			} else if (ecc_result2 < 0) {
+ 				T(YAFFS_TRACE_ERROR,
+ 				  (TSTR
+ 				   ("**>>yaffs ecc error unfixed on chunk %d:1"
+-				    TENDSTR), chunkInNAND));
+-				dev->eccUnfixed++;
++				    TENDSTR), nand_chunk));
++				dev->n_ecc_unfixed++;
+ 			}
+ 
+-			if (eccResult1 || eccResult2) {
++			if (ecc_result1 || ecc_result2) {
+ 				/* We had a data problem on this page */
+-				yaffs_HandleReadDataError(dev, chunkInNAND);
++				yaffs_handle_rd_data_error(dev, nand_chunk);
+ 			}
+ 
+-			if (eccResult1 < 0 || eccResult2 < 0)
+-				*eccResult = YAFFS_ECC_RESULT_UNFIXED;
+-			else if (eccResult1 > 0 || eccResult2 > 0)
+-				*eccResult = YAFFS_ECC_RESULT_FIXED;
++			if (ecc_result1 < 0 || ecc_result2 < 0)
++				*ecc_result = YAFFS_ECC_RESULT_UNFIXED;
++			else if (ecc_result1 > 0 || ecc_result2 > 0)
++				*ecc_result = YAFFS_ECC_RESULT_FIXED;
+ 			else
+-				*eccResult = YAFFS_ECC_RESULT_NO_ERROR;
++				*ecc_result = YAFFS_ECC_RESULT_NO_ERROR;
+ 		}
+ 	} else {
+ 		/* Must allocate enough memory for spare+2*sizeof(int) */
+ 		/* for ecc results from device. */
+-		struct yaffs_NANDSpare nspare;
++		struct yaffs_nand_spare nspare;
+ 
+ 		memset(&nspare, 0, sizeof(nspare));
+ 
+-		retVal = dev->readChunkFromNAND(dev, chunkInNAND, data,
+-					(yaffs_Spare *) &nspare);
+-		memcpy(spare, &nspare, sizeof(yaffs_Spare));
++		retVal = dev->param.read_chunk_fn(dev, nand_chunk, data,
++					(yaffs_spare *) &nspare);
++		memcpy(spare, &nspare, sizeof(yaffs_spare));
+ 		if (data && doErrorCorrection) {
+ 			if (nspare.eccres1 > 0) {
+ 				T(YAFFS_TRACE_ERROR,
+ 				  (TSTR
+ 				   ("**>>mtd ecc error fix performed on chunk %d:0"
+-				    TENDSTR), chunkInNAND));
++				    TENDSTR), nand_chunk));
+ 			} else if (nspare.eccres1 < 0) {
+ 				T(YAFFS_TRACE_ERROR,
+ 				  (TSTR
+ 				   ("**>>mtd ecc error unfixed on chunk %d:0"
+-				    TENDSTR), chunkInNAND));
++				    TENDSTR), nand_chunk));
+ 			}
+ 
+ 			if (nspare.eccres2 > 0) {
+ 				T(YAFFS_TRACE_ERROR,
+ 				  (TSTR
+ 				   ("**>>mtd ecc error fix performed on chunk %d:1"
+-				    TENDSTR), chunkInNAND));
++				    TENDSTR), nand_chunk));
+ 			} else if (nspare.eccres2 < 0) {
+ 				T(YAFFS_TRACE_ERROR,
+ 				  (TSTR
+ 				   ("**>>mtd ecc error unfixed on chunk %d:1"
+-				    TENDSTR), chunkInNAND));
++				    TENDSTR), nand_chunk));
+ 			}
+ 
+ 			if (nspare.eccres1 || nspare.eccres2) {
+ 				/* We had a data problem on this page */
+-				yaffs_HandleReadDataError(dev, chunkInNAND);
++				yaffs_handle_rd_data_error(dev, nand_chunk);
+ 			}
+ 
+ 			if (nspare.eccres1 < 0 || nspare.eccres2 < 0)
+-				*eccResult = YAFFS_ECC_RESULT_UNFIXED;
++				*ecc_result = YAFFS_ECC_RESULT_UNFIXED;
+ 			else if (nspare.eccres1 > 0 || nspare.eccres2 > 0)
+-				*eccResult = YAFFS_ECC_RESULT_FIXED;
++				*ecc_result = YAFFS_ECC_RESULT_FIXED;
+ 			else
+-				*eccResult = YAFFS_ECC_RESULT_NO_ERROR;
++				*ecc_result = YAFFS_ECC_RESULT_NO_ERROR;
+ 
+ 		}
+ 	}
+@@ -300,17 +298,17 @@ static int yaffs_ReadChunkFromNAND(struc
+ }
+ 
+ #ifdef NOTYET
+-static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,
+-				  int chunkInNAND)
++static int yaffs_check_chunk_erased(struct yaffs_dev_s *dev,
++				  int nand_chunk)
+ {
+ 	static int init;
+ 	static __u8 cmpbuf[YAFFS_BYTES_PER_CHUNK];
+ 	static __u8 data[YAFFS_BYTES_PER_CHUNK];
+ 	/* Might as well always allocate the larger size for */
+-	/* dev->useNANDECC == true; */
+-	static __u8 spare[sizeof(struct yaffs_NANDSpare)];
++	/* dev->param.use_nand_ecc == true; */
++	static __u8 spare[sizeof(struct yaffs_nand_spare)];
+ 
+-	dev->readChunkFromNAND(dev, chunkInNAND, data, (yaffs_Spare *) spare);
++	dev->param.read_chunk_fn(dev, nand_chunk, data, (yaffs_spare *) spare);
+ 
+ 	if (!init) {
+ 		memset(cmpbuf, 0xff, YAFFS_BYTES_PER_CHUNK);
+@@ -331,14 +329,14 @@ static int yaffs_CheckChunkErased(struct
+  * Functions for robustisizing
+  */
+ 
+-static void yaffs_HandleReadDataError(yaffs_Device *dev, int chunkInNAND)
++static void yaffs_handle_rd_data_error(yaffs_dev_t *dev, int nand_chunk)
+ {
+-	int blockInNAND = chunkInNAND / dev->nChunksPerBlock;
++	int flash_block = nand_chunk / dev->param.chunks_per_block;
+ 
+ 	/* Mark the block for retirement */
+-	yaffs_GetBlockInfo(dev, blockInNAND + dev->blockOffset)->needsRetiring = 1;
++	yaffs_get_block_info(dev, flash_block + dev->block_offset)->needs_retiring = 1;
+ 	T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
+-	  (TSTR("**>>Block %d marked for retirement" TENDSTR), blockInNAND));
++	  (TSTR("**>>Block %d marked for retirement" TENDSTR), flash_block));
+ 
+ 	/* TODO:
+ 	 * Just do a garbage collection on the affected block
+@@ -348,44 +346,44 @@ static void yaffs_HandleReadDataError(ya
+ }
+ 
+ #ifdef NOTYET
+-static void yaffs_CheckWrittenBlock(yaffs_Device *dev, int chunkInNAND)
++static void yaffs_check_written_block(yaffs_dev_t *dev, int nand_chunk)
+ {
+ }
+ 
+-static void yaffs_HandleWriteChunkOk(yaffs_Device *dev, int chunkInNAND,
++static void yaffs_handle_chunk_wr_ok(yaffs_dev_t *dev, int nand_chunk,
+ 				     const __u8 *data,
+-				     const yaffs_Spare *spare)
++				     const yaffs_spare *spare)
+ {
+ }
+ 
+-static void yaffs_HandleUpdateChunk(yaffs_Device *dev, int chunkInNAND,
+-				    const yaffs_Spare *spare)
++static void yaffs_handle_chunk_update(yaffs_dev_t *dev, int nand_chunk,
++				    const yaffs_spare *spare)
+ {
+ }
+ 
+-static void yaffs_HandleWriteChunkError(yaffs_Device *dev, int chunkInNAND)
++static void yaffs_handle_chunk_wr_error(yaffs_dev_t *dev, int nand_chunk)
+ {
+-	int blockInNAND = chunkInNAND / dev->nChunksPerBlock;
++	int flash_block = nand_chunk / dev->param.chunks_per_block;
+ 
+ 	/* Mark the block for retirement */
+-	yaffs_GetBlockInfo(dev, blockInNAND)->needsRetiring = 1;
++	yaffs_get_block_info(dev, flash_block)->needs_retiring = 1;
+ 	/* Delete the chunk */
+-	yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__);
++	yaffs_chunk_del(dev, nand_chunk, 1, __LINE__);
+ }
+ 
+-static int yaffs_VerifyCompare(const __u8 *d0, const __u8 *d1,
+-			       const yaffs_Spare *s0, const yaffs_Spare *s1)
++static int yaffs_verify_cmp(const __u8 *d0, const __u8 *d1,
++			       const yaffs_spare *s0, const yaffs_spare *s1)
+ {
+ 
+ 	if (memcmp(d0, d1, YAFFS_BYTES_PER_CHUNK) != 0 ||
+-	    s0->tagByte0 != s1->tagByte0 ||
+-	    s0->tagByte1 != s1->tagByte1 ||
+-	    s0->tagByte2 != s1->tagByte2 ||
+-	    s0->tagByte3 != s1->tagByte3 ||
+-	    s0->tagByte4 != s1->tagByte4 ||
+-	    s0->tagByte5 != s1->tagByte5 ||
+-	    s0->tagByte6 != s1->tagByte6 ||
+-	    s0->tagByte7 != s1->tagByte7 ||
++	    s0->tb0 != s1->tb0 ||
++	    s0->tb1 != s1->tb1 ||
++	    s0->tb2 != s1->tb2 ||
++	    s0->tb3 != s1->tb3 ||
++	    s0->tb4 != s1->tb4 ||
++	    s0->tb5 != s1->tb5 ||
++	    s0->tb6 != s1->tb6 ||
++	    s0->tb7 != s1->tb7 ||
+ 	    s0->ecc1[0] != s1->ecc1[0] ||
+ 	    s0->ecc1[1] != s1->ecc1[1] ||
+ 	    s0->ecc1[2] != s1->ecc1[2] ||
+@@ -398,53 +396,53 @@ static int yaffs_VerifyCompare(const __u
+ }
+ #endif				/* NOTYET */
+ 
+-int yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(yaffs_Device *dev,
+-						int chunkInNAND,
++int yaffs_tags_compat_wr(yaffs_dev_t *dev,
++						int nand_chunk,
+ 						const __u8 *data,
+-						const yaffs_ExtendedTags *eTags)
++						const yaffs_ext_tags *eTags)
+ {
+-	yaffs_Spare spare;
+-	yaffs_Tags tags;
++	yaffs_spare spare;
++	yaffs_tags_t tags;
+ 
+-	yaffs_SpareInitialise(&spare);
++	yaffs_spare_init(&spare);
+ 
+-	if (eTags->chunkDeleted)
+-		spare.pageStatus = 0;
++	if (eTags->is_deleted)
++		spare.page_status = 0;
+ 	else {
+-		tags.objectId = eTags->objectId;
+-		tags.chunkId = eTags->chunkId;
++		tags.obj_id = eTags->obj_id;
++		tags.chunk_id = eTags->chunk_id;
+ 
+-		tags.byteCountLSB = eTags->byteCount & 0x3ff;
++		tags.n_bytes_lsb = eTags->n_bytes & 0x3ff;
+ 
+-		if (dev->nDataBytesPerChunk >= 1024)
+-			tags.byteCountMSB = (eTags->byteCount >> 10) & 3;
++		if (dev->data_bytes_per_chunk >= 1024)
++			tags.n_bytes_msb = (eTags->n_bytes >> 10) & 3;
+ 		else
+-			tags.byteCountMSB = 3;
++			tags.n_bytes_msb = 3;
+ 
+ 
+-		tags.serialNumber = eTags->serialNumber;
++		tags.serial_number = eTags->serial_number;
+ 
+-		if (!dev->useNANDECC && data)
+-			yaffs_CalcECC(data, &spare);
++		if (!dev->param.use_nand_ecc && data)
++			yaffs_calc_ecc(data, &spare);
+ 
+-		yaffs_LoadTagsIntoSpare(&spare, &tags);
++		yaffs_load_tags_to_spare(&spare, &tags);
+ 
+ 	}
+ 
+-	return yaffs_WriteChunkToNAND(dev, chunkInNAND, data, &spare);
++	return yaffs_wr_nand(dev, nand_chunk, data, &spare);
+ }
+ 
+-int yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(yaffs_Device *dev,
+-						     int chunkInNAND,
++int yaffs_tags_compat_rd(yaffs_dev_t *dev,
++						     int nand_chunk,
+ 						     __u8 *data,
+-						     yaffs_ExtendedTags *eTags)
++						     yaffs_ext_tags *eTags)
+ {
+ 
+-	yaffs_Spare spare;
+-	yaffs_Tags tags;
+-	yaffs_ECCResult eccResult = YAFFS_ECC_RESULT_UNKNOWN;
++	yaffs_spare spare;
++	yaffs_tags_t tags;
++	yaffs_ecc_result ecc_result = YAFFS_ECC_RESULT_UNKNOWN;
+ 
+-	static yaffs_Spare spareFF;
++	static yaffs_spare spareFF;
+ 	static int init;
+ 
+ 	if (!init) {
+@@ -452,33 +450,33 @@ int yaffs_TagsCompatabilityReadChunkWith
+ 		init = 1;
+ 	}
+ 
+-	if (yaffs_ReadChunkFromNAND
+-	    (dev, chunkInNAND, data, &spare, &eccResult, 1)) {
++	if (yaffs_rd_chunk_nand
++	    (dev, nand_chunk, data, &spare, &ecc_result, 1)) {
+ 		/* eTags may be NULL */
+ 		if (eTags) {
+ 
+ 			int deleted =
+-			    (yaffs_CountBits(spare.pageStatus) < 7) ? 1 : 0;
++			    (yaffs_count_bits(spare.page_status) < 7) ? 1 : 0;
+ 
+-			eTags->chunkDeleted = deleted;
+-			eTags->eccResult = eccResult;
+-			eTags->blockBad = 0;	/* We're reading it */
++			eTags->is_deleted = deleted;
++			eTags->ecc_result = ecc_result;
++			eTags->block_bad = 0;	/* We're reading it */
+ 			/* therefore it is not a bad block */
+-			eTags->chunkUsed =
++			eTags->chunk_used =
+ 			    (memcmp(&spareFF, &spare, sizeof(spareFF)) !=
+ 			     0) ? 1 : 0;
+ 
+-			if (eTags->chunkUsed) {
+-				yaffs_GetTagsFromSpare(dev, &spare, &tags);
++			if (eTags->chunk_used) {
++				yaffs_get_tags_from_spare(dev, &spare, &tags);
+ 
+-				eTags->objectId = tags.objectId;
+-				eTags->chunkId = tags.chunkId;
+-				eTags->byteCount = tags.byteCountLSB;
++				eTags->obj_id = tags.obj_id;
++				eTags->chunk_id = tags.chunk_id;
++				eTags->n_bytes = tags.n_bytes_lsb;
+ 
+-				if (dev->nDataBytesPerChunk >= 1024)
+-					eTags->byteCount |= (((unsigned) tags.byteCountMSB) << 10);
++				if (dev->data_bytes_per_chunk >= 1024)
++					eTags->n_bytes |= (((unsigned) tags.n_bytes_msb) << 10);
+ 
+-				eTags->serialNumber = tags.serialNumber;
++				eTags->serial_number = tags.serial_number;
+ 			}
+ 		}
+ 
+@@ -488,49 +486,49 @@ int yaffs_TagsCompatabilityReadChunkWith
+ 	}
+ }
+ 
+-int yaffs_TagsCompatabilityMarkNANDBlockBad(struct yaffs_DeviceStruct *dev,
+-					    int blockInNAND)
++int yaffs_tags_compat_mark_bad(struct yaffs_dev_s *dev,
++					    int flash_block)
+ {
+ 
+-	yaffs_Spare spare;
++	yaffs_spare spare;
+ 
+-	memset(&spare, 0xff, sizeof(yaffs_Spare));
++	memset(&spare, 0xff, sizeof(yaffs_spare));
+ 
+-	spare.blockStatus = 'Y';
++	spare.block_status = 'Y';
+ 
+-	yaffs_WriteChunkToNAND(dev, blockInNAND * dev->nChunksPerBlock, NULL,
++	yaffs_wr_nand(dev, flash_block * dev->param.chunks_per_block, NULL,
+ 			       &spare);
+-	yaffs_WriteChunkToNAND(dev, blockInNAND * dev->nChunksPerBlock + 1,
++	yaffs_wr_nand(dev, flash_block * dev->param.chunks_per_block + 1,
+ 			       NULL, &spare);
+ 
+ 	return YAFFS_OK;
+ 
+ }
+ 
+-int yaffs_TagsCompatabilityQueryNANDBlock(struct yaffs_DeviceStruct *dev,
+-					  int blockNo,
+-					  yaffs_BlockState *state,
+-					  __u32 *sequenceNumber)
++int yaffs_tags_compat_query_block(struct yaffs_dev_s *dev,
++					  int block_no,
++					  yaffs_block_state_t *state,
++					  __u32 *seq_number)
+ {
+ 
+-	yaffs_Spare spare0, spare1;
+-	static yaffs_Spare spareFF;
++	yaffs_spare spare0, spare1;
++	static yaffs_spare spareFF;
+ 	static int init;
+-	yaffs_ECCResult dummy;
++	yaffs_ecc_result dummy;
+ 
+ 	if (!init) {
+ 		memset(&spareFF, 0xFF, sizeof(spareFF));
+ 		init = 1;
+ 	}
+ 
+-	*sequenceNumber = 0;
++	*seq_number = 0;
+ 
+-	yaffs_ReadChunkFromNAND(dev, blockNo * dev->nChunksPerBlock, NULL,
++	yaffs_rd_chunk_nand(dev, block_no * dev->param.chunks_per_block, NULL,
+ 				&spare0, &dummy, 1);
+-	yaffs_ReadChunkFromNAND(dev, blockNo * dev->nChunksPerBlock + 1, NULL,
++	yaffs_rd_chunk_nand(dev, block_no * dev->param.chunks_per_block + 1, NULL,
+ 				&spare1, &dummy, 1);
+ 
+-	if (yaffs_CountBits(spare0.blockStatus & spare1.blockStatus) < 7)
++	if (yaffs_count_bits(spare0.block_status & spare1.block_status) < 7)
+ 		*state = YAFFS_BLOCK_STATE_DEAD;
+ 	else if (memcmp(&spareFF, &spare0, sizeof(spareFF)) == 0)
+ 		*state = YAFFS_BLOCK_STATE_EMPTY;
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffs_tagscompat.h linux-2.6.36-rc8.new/fs/yaffs2/yaffs_tagscompat.h
+--- linux-2.6.36-rc8/fs/yaffs2/yaffs_tagscompat.h	2010-10-20 13:17:58.961000294 +0300
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffs_tagscompat.h	2010-10-20 13:28:16.064000294 +0300
+@@ -1,7 +1,7 @@
+ /*
+  * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+  *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+  *   for Toby Churchill Ltd and Brightstar Engineering
+  *
+  * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -17,23 +17,23 @@
+ #define __YAFFS_TAGSCOMPAT_H__
+ 
+ #include "yaffs_guts.h"
+-int yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(yaffs_Device *dev,
+-						int chunkInNAND,
++int yaffs_tags_compat_wr(yaffs_dev_t *dev,
++						int nand_chunk,
+ 						const __u8 *data,
+-						const yaffs_ExtendedTags *tags);
+-int yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(yaffs_Device *dev,
+-						int chunkInNAND,
++						const yaffs_ext_tags *tags);
++int yaffs_tags_compat_rd(yaffs_dev_t *dev,
++						int nand_chunk,
+ 						__u8 *data,
+-						yaffs_ExtendedTags *tags);
+-int yaffs_TagsCompatabilityMarkNANDBlockBad(struct yaffs_DeviceStruct *dev,
+-					    int blockNo);
+-int yaffs_TagsCompatabilityQueryNANDBlock(struct yaffs_DeviceStruct *dev,
+-					  int blockNo,
+-					  yaffs_BlockState *state,
+-					  __u32 *sequenceNumber);
++						yaffs_ext_tags *tags);
++int yaffs_tags_compat_mark_bad(struct yaffs_dev_s *dev,
++					    int block_no);
++int yaffs_tags_compat_query_block(struct yaffs_dev_s *dev,
++					  int block_no,
++					  yaffs_block_state_t *state,
++					  __u32 *seq_number);
+ 
+-void yaffs_CalcTagsECC(yaffs_Tags *tags);
+-int yaffs_CheckECCOnTags(yaffs_Tags *tags);
+-int yaffs_CountBits(__u8 byte);
++void yaffs_calc_tags_ecc(yaffs_tags_t *tags);
++int yaffs_check_tags_ecc(yaffs_tags_t *tags);
++int yaffs_count_bits(__u8 byte);
+ 
+ #endif
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffs_tagsvalidity.c linux-2.6.36-rc8.new/fs/yaffs2/yaffs_tagsvalidity.c
+--- linux-2.6.36-rc8/fs/yaffs2/yaffs_tagsvalidity.c	2010-10-20 13:17:58.962000294 +0300
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffs_tagsvalidity.c	2010-10-20 13:28:16.030000294 +0300
+@@ -1,7 +1,7 @@
+ /*
+  * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+  *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+  *   for Toby Churchill Ltd and Brightstar Engineering
+  *
+  * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -13,16 +13,16 @@
+ 
+ #include "yaffs_tagsvalidity.h"
+ 
+-void yaffs_InitialiseTags(yaffs_ExtendedTags *tags)
++void yaffs_init_tags(yaffs_ext_tags *tags)
+ {
+-	memset(tags, 0, sizeof(yaffs_ExtendedTags));
+-	tags->validMarker0 = 0xAAAAAAAA;
+-	tags->validMarker1 = 0x55555555;
++	memset(tags, 0, sizeof(yaffs_ext_tags));
++	tags->validity1 = 0xAAAAAAAA;
++	tags->validty1 = 0x55555555;
+ }
+ 
+-int yaffs_ValidateTags(yaffs_ExtendedTags *tags)
++int yaffs_validate_tags(yaffs_ext_tags *tags)
+ {
+-	return (tags->validMarker0 == 0xAAAAAAAA &&
+-		tags->validMarker1 == 0x55555555);
++	return (tags->validity1 == 0xAAAAAAAA &&
++		tags->validty1 == 0x55555555);
+ 
+ }
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffs_tagsvalidity.h linux-2.6.36-rc8.new/fs/yaffs2/yaffs_tagsvalidity.h
+--- linux-2.6.36-rc8/fs/yaffs2/yaffs_tagsvalidity.h	2010-10-20 13:17:58.962000294 +0300
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffs_tagsvalidity.h	2010-10-20 13:28:16.064000294 +0300
+@@ -1,7 +1,7 @@
+ /*
+  * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+  *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+  *   for Toby Churchill Ltd and Brightstar Engineering
+  *
+  * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -19,6 +19,6 @@
+ 
+ #include "yaffs_guts.h"
+ 
+-void yaffs_InitialiseTags(yaffs_ExtendedTags *tags);
+-int yaffs_ValidateTags(yaffs_ExtendedTags *tags);
++void yaffs_init_tags(yaffs_ext_tags *tags);
++int yaffs_validate_tags(yaffs_ext_tags *tags);
+ #endif
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffs_trace.h linux-2.6.36-rc8.new/fs/yaffs2/yaffs_trace.h
+--- linux-2.6.36-rc8/fs/yaffs2/yaffs_trace.h	1970-01-01 02:00:00.000000000 +0200
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffs_trace.h	2010-10-20 13:28:16.064000294 +0300
+@@ -0,0 +1,60 @@
++/*
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2010 Aleph One Ltd.
++ *   for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ */
++
++
++#ifndef __YTRACE_H__
++#define __YTRACE_H__
++
++extern unsigned int yaffs_trace_mask;
++extern unsigned int yaffs_wr_attempts;
++
++/*
++ * Tracing flags.
++ * The flags masked in YAFFS_TRACE_ALWAYS are always traced.
++ */
++
++#define YAFFS_TRACE_OS			0x00000002
++#define YAFFS_TRACE_ALLOCATE		0x00000004
++#define YAFFS_TRACE_SCAN		0x00000008
++#define YAFFS_TRACE_BAD_BLOCKS		0x00000010
++#define YAFFS_TRACE_ERASE		0x00000020
++#define YAFFS_TRACE_GC			0x00000040
++#define YAFFS_TRACE_WRITE		0x00000080
++#define YAFFS_TRACE_TRACING		0x00000100
++#define YAFFS_TRACE_DELETION		0x00000200
++#define YAFFS_TRACE_BUFFERS		0x00000400
++#define YAFFS_TRACE_NANDACCESS		0x00000800
++#define YAFFS_TRACE_GC_DETAIL		0x00001000
++#define YAFFS_TRACE_SCAN_DEBUG		0x00002000
++#define YAFFS_TRACE_MTD			0x00004000
++#define YAFFS_TRACE_CHECKPOINT		0x00008000
++
++#define YAFFS_TRACE_VERIFY		0x00010000
++#define YAFFS_TRACE_VERIFY_NAND		0x00020000
++#define YAFFS_TRACE_VERIFY_FULL		0x00040000
++#define YAFFS_TRACE_VERIFY_ALL		0x000F0000
++
++#define YAFFS_TRACE_SYNC		0x00100000
++#define YAFFS_TRACE_BACKGROUND		0x00200000
++#define YAFFS_TRACE_LOCK		0x00400000
++
++#define YAFFS_TRACE_ERROR		0x40000000
++#define YAFFS_TRACE_BUG			0x80000000
++#define YAFFS_TRACE_ALWAYS		0xF0000000
++
++
++#define T(mask, p) do { if ((mask) & (yaffs_trace_mask | YAFFS_TRACE_ALWAYS)) TOUT(p); } while (0)
++
++#endif
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffs_verify.c linux-2.6.36-rc8.new/fs/yaffs2/yaffs_verify.c
+--- linux-2.6.36-rc8/fs/yaffs2/yaffs_verify.c	1970-01-01 02:00:00.000000000 +0200
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffs_verify.c	2010-10-20 13:28:16.031000294 +0300
+@@ -0,0 +1,626 @@
++/*
++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2010 Aleph One Ltd.
++ *   for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ */
++
++
++#include "yaffs_verify.h"
++#include "yaffs_trace.h"
++#include "yaffs_bitmap.h"
++#include "yaffs_getblockinfo.h"
++#include "yaffs_nand.h"
++
++int yaffs_skip_verification(yaffs_dev_t *dev)
++{
++	dev=dev;
++	return !(yaffs_trace_mask & (YAFFS_TRACE_VERIFY | YAFFS_TRACE_VERIFY_FULL));
++}
++
++static int yaffs_skip_full_verification(yaffs_dev_t *dev)
++{
++	dev=dev;
++	return !(yaffs_trace_mask & (YAFFS_TRACE_VERIFY_FULL));
++}
++
++static int yaffs_skip_nand_verification(yaffs_dev_t *dev)
++{
++	dev=dev;
++	return !(yaffs_trace_mask & (YAFFS_TRACE_VERIFY_NAND));
++}
++
++
++static const char *block_stateName[] = {
++"Unknown",
++"Needs scanning",
++"Scanning",
++"Empty",
++"Allocating",
++"Full",
++"Dirty",
++"Checkpoint",
++"Collecting",
++"Dead"
++};
++
++
++void yaffs_verify_blk(yaffs_dev_t *dev, yaffs_block_info_t *bi, int n)
++{
++	int actuallyUsed;
++	int inUse;
++
++	if (yaffs_skip_verification(dev))
++		return;
++
++	/* Report illegal runtime states */
++	if (bi->block_state >= YAFFS_NUMBER_OF_BLOCK_STATES)
++		T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has undefined state %d"TENDSTR), n, bi->block_state));
++
++	switch (bi->block_state) {
++	case YAFFS_BLOCK_STATE_UNKNOWN:
++	case YAFFS_BLOCK_STATE_SCANNING:
++	case YAFFS_BLOCK_STATE_NEEDS_SCANNING:
++		T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has bad run-state %s"TENDSTR),
++		n, block_stateName[bi->block_state]));
++	}
++
++	/* Check pages in use and soft deletions are legal */
++
++	actuallyUsed = bi->pages_in_use - bi->soft_del_pages;
++
++	if (bi->pages_in_use < 0 || bi->pages_in_use > dev->param.chunks_per_block ||
++	   bi->soft_del_pages < 0 || bi->soft_del_pages > dev->param.chunks_per_block ||
++	   actuallyUsed < 0 || actuallyUsed > dev->param.chunks_per_block)
++		T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has illegal values pages_in_used %d soft_del_pages %d"TENDSTR),
++		n, bi->pages_in_use, bi->soft_del_pages));
++
++
++	/* Check chunk bitmap legal */
++	inUse = yaffs_count_chunk_bits(dev, n);
++	if (inUse != bi->pages_in_use)
++		T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has inconsistent values pages_in_use %d counted chunk bits %d"TENDSTR),
++			n, bi->pages_in_use, inUse));
++
++}
++
++
++
++void yaffs_verify_collected_blk(yaffs_dev_t *dev, yaffs_block_info_t *bi, int n)
++{
++	yaffs_verify_blk(dev, bi, n);
++
++	/* After collection the block should be in the erased state */
++
++	if (bi->block_state != YAFFS_BLOCK_STATE_COLLECTING &&
++			bi->block_state != YAFFS_BLOCK_STATE_EMPTY) {
++		T(YAFFS_TRACE_ERROR, (TSTR("Block %d is in state %d after gc, should be erased"TENDSTR),
++			n, bi->block_state));
++	}
++}
++
++void yaffs_verify_blocks(yaffs_dev_t *dev)
++{
++	int i;
++	int nBlocksPerState[YAFFS_NUMBER_OF_BLOCK_STATES];
++	int nIllegalBlockStates = 0;
++
++	if (yaffs_skip_verification(dev))
++		return;
++
++	memset(nBlocksPerState, 0, sizeof(nBlocksPerState));
++
++	for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) {
++		yaffs_block_info_t *bi = yaffs_get_block_info(dev, i);
++		yaffs_verify_blk(dev, bi, i);
++
++		if (bi->block_state < YAFFS_NUMBER_OF_BLOCK_STATES)
++			nBlocksPerState[bi->block_state]++;
++		else
++			nIllegalBlockStates++;
++	}
++
++	T(YAFFS_TRACE_VERIFY, (TSTR(""TENDSTR)));
++	T(YAFFS_TRACE_VERIFY, (TSTR("Block summary"TENDSTR)));
++
++	T(YAFFS_TRACE_VERIFY, (TSTR("%d blocks have illegal states"TENDSTR), nIllegalBlockStates));
++	if (nBlocksPerState[YAFFS_BLOCK_STATE_ALLOCATING] > 1)
++		T(YAFFS_TRACE_VERIFY, (TSTR("Too many allocating blocks"TENDSTR)));
++
++	for (i = 0; i < YAFFS_NUMBER_OF_BLOCK_STATES; i++)
++		T(YAFFS_TRACE_VERIFY,
++		  (TSTR("%s %d blocks"TENDSTR),
++		  block_stateName[i], nBlocksPerState[i]));
++
++	if (dev->blocks_in_checkpt != nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT])
++		T(YAFFS_TRACE_VERIFY,
++		 (TSTR("Checkpoint block count wrong dev %d count %d"TENDSTR),
++		 dev->blocks_in_checkpt, nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT]));
++
++	if (dev->n_erased_blocks != nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY])
++		T(YAFFS_TRACE_VERIFY,
++		 (TSTR("Erased block count wrong dev %d count %d"TENDSTR),
++		 dev->n_erased_blocks, nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY]));
++
++	if (nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING] > 1)
++		T(YAFFS_TRACE_VERIFY,
++		 (TSTR("Too many collecting blocks %d (max is 1)"TENDSTR),
++		 nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING]));
++
++	T(YAFFS_TRACE_VERIFY, (TSTR(""TENDSTR)));
++
++}
++
++/*
++ * Verify the object header. oh must be valid, but obj and tags may be NULL in which
++ * case those tests will not be performed.
++ */
++void yaffs_verify_oh(yaffs_obj_t *obj, yaffs_obj_header *oh, yaffs_ext_tags *tags, int parentCheck)
++{
++	if (obj && yaffs_skip_verification(obj->my_dev))
++		return;
++
++	if (!(tags && obj && oh)) {
++		T(YAFFS_TRACE_VERIFY,
++				(TSTR("Verifying object header tags %p obj %p oh %p"TENDSTR),
++				tags, obj, oh));
++		return;
++	}
++
++	if (oh->type <= YAFFS_OBJECT_TYPE_UNKNOWN ||
++			oh->type > YAFFS_OBJECT_TYPE_MAX)
++		T(YAFFS_TRACE_VERIFY,
++			(TSTR("Obj %d header type is illegal value 0x%x"TENDSTR),
++			tags->obj_id, oh->type));
++
++	if (tags->obj_id != obj->obj_id)
++		T(YAFFS_TRACE_VERIFY,
++			(TSTR("Obj %d header mismatch obj_id %d"TENDSTR),
++			tags->obj_id, obj->obj_id));
++
++
++	/*
++	 * Check that the object's parent ids match if parentCheck requested.
++	 *
++	 * Tests do not apply to the root object.
++	 */
++
++	if (parentCheck && tags->obj_id > 1 && !obj->parent)
++		T(YAFFS_TRACE_VERIFY,
++			(TSTR("Obj %d header mismatch parent_id %d obj->parent is NULL"TENDSTR),
++			tags->obj_id, oh->parent_obj_id));
++
++	if (parentCheck && obj->parent &&
++			oh->parent_obj_id != obj->parent->obj_id &&
++			(oh->parent_obj_id != YAFFS_OBJECTID_UNLINKED ||
++			obj->parent->obj_id != YAFFS_OBJECTID_DELETED))
++		T(YAFFS_TRACE_VERIFY,
++			(TSTR("Obj %d header mismatch parent_id %d parent_obj_id %d"TENDSTR),
++			tags->obj_id, oh->parent_obj_id, obj->parent->obj_id));
++
++	if (tags->obj_id > 1 && oh->name[0] == 0) /* Null name */
++		T(YAFFS_TRACE_VERIFY,
++			(TSTR("Obj %d header name is NULL"TENDSTR),
++			obj->obj_id));
++
++	if (tags->obj_id > 1 && ((__u8)(oh->name[0])) == 0xff) /* Trashed name */
++		T(YAFFS_TRACE_VERIFY,
++			(TSTR("Obj %d header name is 0xFF"TENDSTR),
++			obj->obj_id));
++}
++
++
++#if 0
++/* Not being used, but don't want to throw away yet */
++int yaffs_verify_tnode_worker(yaffs_obj_t *obj, yaffs_tnode_t *tn,
++					__u32 level, int chunk_offset)
++{
++	int i;
++	yaffs_dev_t *dev = obj->my_dev;
++	int ok = 1;
++
++	if (tn) {
++		if (level > 0) {
++
++			for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) {
++				if (tn->internal[i]) {
++					ok = yaffs_verify_tnode_worker(obj,
++							tn->internal[i],
++							level - 1,
++							(chunk_offset<<YAFFS_TNODES_INTERNAL_BITS) + i);
++				}
++			}
++		} else if (level == 0) {
++			yaffs_ext_tags tags;
++			__u32 obj_id = obj->obj_id;
++
++			chunk_offset <<=  YAFFS_TNODES_LEVEL0_BITS;
++
++			for (i = 0; i < YAFFS_NTNODES_LEVEL0; i++) {
++				__u32 theChunk = yaffs_get_group_base(dev, tn, i);
++
++				if (theChunk > 0) {
++					/* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),tags.obj_id,tags.chunk_id,theChunk)); */
++					yaffs_rd_chunk_tags_nand(dev, theChunk, NULL, &tags);
++					if (tags.obj_id != obj_id || tags.chunk_id != chunk_offset) {
++						T(~0, (TSTR("Object %d chunk_id %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR),
++							obj_id, chunk_offset, theChunk,
++							tags.obj_id, tags.chunk_id));
++					}
++				}
++				chunk_offset++;
++			}
++		}
++	}
++
++	return ok;
++
++}
++
++#endif
++
++void yaffs_verify_file(yaffs_obj_t *obj)
++{
++	int requiredTallness;
++	int actualTallness;
++	__u32 lastChunk;
++	__u32 x;
++	__u32 i;
++	yaffs_dev_t *dev;
++	yaffs_ext_tags tags;
++	yaffs_tnode_t *tn;
++	__u32 obj_id;
++
++	if (!obj)
++		return;
++
++	if (yaffs_skip_verification(obj->my_dev))
++		return;
++
++	dev = obj->my_dev;
++	obj_id = obj->obj_id;
++
++	/* Check file size is consistent with tnode depth */
++	lastChunk =  obj->variant.file_variant.file_size / dev->data_bytes_per_chunk + 1;
++	x = lastChunk >> YAFFS_TNODES_LEVEL0_BITS;
++	requiredTallness = 0;
++	while (x > 0) {
++		x >>= YAFFS_TNODES_INTERNAL_BITS;
++		requiredTallness++;
++	}
++
++	actualTallness = obj->variant.file_variant.top_level;
++
++	/* Check that the chunks in the tnode tree are all correct.
++	 * We do this by scanning through the tnode tree and
++	 * checking the tags for every chunk match.
++	 */
++
++	if (yaffs_skip_nand_verification(dev))
++		return;
++
++	for (i = 1; i <= lastChunk; i++) {
++		tn = yaffs_find_tnode_0(dev, &obj->variant.file_variant, i);
++
++		if (tn) {
++			__u32 theChunk = yaffs_get_group_base(dev, tn, i);
++			if (theChunk > 0) {
++				/* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),obj_id,i,theChunk)); */
++				yaffs_rd_chunk_tags_nand(dev, theChunk, NULL, &tags);
++				if (tags.obj_id != obj_id || tags.chunk_id != i) {
++					T(~0, (TSTR("Object %d chunk_id %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR),
++						obj_id, i, theChunk,
++						tags.obj_id, tags.chunk_id));
++				}
++			}
++		}
++	}
++}
++
++
++void yaffs_verify_link(yaffs_obj_t *obj)
++{
++	if (obj && yaffs_skip_verification(obj->my_dev))
++		return;
++
++	/* Verify sane equivalent object */
++}
++
++void yaffs_verify_symlink(yaffs_obj_t *obj)
++{
++	if (obj && yaffs_skip_verification(obj->my_dev))
++		return;
++
++	/* Verify symlink string */
++}
++
++void yaffs_verify_special(yaffs_obj_t *obj)
++{
++	if (obj && yaffs_skip_verification(obj->my_dev))
++		return;
++}
++
++void yaffs_verify_obj(yaffs_obj_t *obj)
++{
++	yaffs_dev_t *dev;
++
++	__u32 chunkMin;
++	__u32 chunkMax;
++
++	__u32 chunk_idOk;
++	__u32 chunkInRange;
++	__u32 chunkShouldNotBeDeleted;
++	__u32 chunkValid;
++
++	if (!obj)
++		return;
++
++	if (obj->being_created)
++		return;
++
++	dev = obj->my_dev;
++
++	if (yaffs_skip_verification(dev))
++		return;
++
++	/* Check sane object header chunk */
++
++	chunkMin = dev->internal_start_block * dev->param.chunks_per_block;
++	chunkMax = (dev->internal_end_block+1) * dev->param.chunks_per_block - 1;
++
++	chunkInRange = (((unsigned)(obj->hdr_chunk)) >= chunkMin && ((unsigned)(obj->hdr_chunk)) <= chunkMax);
++	chunk_idOk = chunkInRange || (obj->hdr_chunk == 0);
++	chunkValid = chunkInRange &&
++			yaffs_check_chunk_bit(dev,
++					obj->hdr_chunk / dev->param.chunks_per_block,
++					obj->hdr_chunk % dev->param.chunks_per_block);
++	chunkShouldNotBeDeleted = chunkInRange && !chunkValid;
++
++	if (!obj->fake &&
++			(!chunk_idOk || chunkShouldNotBeDeleted)) {
++		T(YAFFS_TRACE_VERIFY,
++			(TSTR("Obj %d has chunk_id %d %s %s"TENDSTR),
++			obj->obj_id, obj->hdr_chunk,
++			chunk_idOk ? "" : ",out of range",
++			chunkShouldNotBeDeleted ? ",marked as deleted" : ""));
++	}
++
++	if (chunkValid && !yaffs_skip_nand_verification(dev)) {
++		yaffs_ext_tags tags;
++		yaffs_obj_header *oh;
++		__u8 *buffer = yaffs_get_temp_buffer(dev, __LINE__);
++
++		oh = (yaffs_obj_header *)buffer;
++
++		yaffs_rd_chunk_tags_nand(dev, obj->hdr_chunk, buffer,
++				&tags);
++
++		yaffs_verify_oh(obj, oh, &tags, 1);
++
++		yaffs_release_temp_buffer(dev, buffer, __LINE__);
++	}
++
++	/* Verify it has a parent */
++	if (obj && !obj->fake &&
++			(!obj->parent || obj->parent->my_dev != dev)) {
++		T(YAFFS_TRACE_VERIFY,
++			(TSTR("Obj %d has parent pointer %p which does not look like an object"TENDSTR),
++			obj->obj_id, obj->parent));
++	}
++
++	/* Verify parent is a directory */
++	if (obj->parent && obj->parent->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
++		T(YAFFS_TRACE_VERIFY,
++			(TSTR("Obj %d's parent is not a directory (type %d)"TENDSTR),
++			obj->obj_id, obj->parent->variant_type));
++	}
++
++	switch (obj->variant_type) {
++	case YAFFS_OBJECT_TYPE_FILE:
++		yaffs_verify_file(obj);
++		break;
++	case YAFFS_OBJECT_TYPE_SYMLINK:
++		yaffs_verify_symlink(obj);
++		break;
++	case YAFFS_OBJECT_TYPE_DIRECTORY:
++		yaffs_verify_dir(obj);
++		break;
++	case YAFFS_OBJECT_TYPE_HARDLINK:
++		yaffs_verify_link(obj);
++		break;
++	case YAFFS_OBJECT_TYPE_SPECIAL:
++		yaffs_verify_special(obj);
++		break;
++	case YAFFS_OBJECT_TYPE_UNKNOWN:
++	default:
++		T(YAFFS_TRACE_VERIFY,
++		(TSTR("Obj %d has illegaltype %d"TENDSTR),
++		obj->obj_id, obj->variant_type));
++		break;
++	}
++}
++
++void yaffs_verify_objects(yaffs_dev_t *dev)
++{
++	yaffs_obj_t *obj;
++	int i;
++	struct ylist_head *lh;
++
++	if (yaffs_skip_verification(dev))
++		return;
++
++	/* Iterate through the objects in each hash entry */
++
++	for (i = 0; i <  YAFFS_NOBJECT_BUCKETS; i++) {
++		ylist_for_each(lh, &dev->obj_bucket[i].list) {
++			if (lh) {
++				obj = ylist_entry(lh, yaffs_obj_t, hash_link);
++				yaffs_verify_obj(obj);
++			}
++		}
++	}
++}
++
++
++void yaffs_verify_obj_in_dir(yaffs_obj_t *obj)
++{
++	struct ylist_head *lh;
++	yaffs_obj_t *listObj;
++
++	int count = 0;
++
++	if (!obj) {
++		T(YAFFS_TRACE_ALWAYS, (TSTR("No object to verify" TENDSTR)));
++		YBUG();
++		return;
++	}
++
++	if (yaffs_skip_verification(obj->my_dev))
++		return;
++
++	if (!obj->parent) {
++		T(YAFFS_TRACE_ALWAYS, (TSTR("Object does not have parent" TENDSTR)));
++		YBUG();
++		return;
++	}
++
++	if (obj->parent->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
++		T(YAFFS_TRACE_ALWAYS, (TSTR("Parent is not directory" TENDSTR)));
++		YBUG();
++	}
++
++	/* Iterate through the objects in each hash entry */
++
++	ylist_for_each(lh, &obj->parent->variant.dir_variant.children) {
++		if (lh) {
++			listObj = ylist_entry(lh, yaffs_obj_t, siblings);
++			yaffs_verify_obj(listObj);
++			if (obj == listObj)
++				count++;
++		}
++	 }
++
++	if (count != 1) {
++		T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory %d times" TENDSTR), count));
++		YBUG();
++	}
++}
++
++void yaffs_verify_dir(yaffs_obj_t *directory)
++{
++	struct ylist_head *lh;
++	yaffs_obj_t *listObj;
++
++	if (!directory) {
++		YBUG();
++		return;
++	}
++
++	if (yaffs_skip_full_verification(directory->my_dev))
++		return;
++
++	if (directory->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
++		T(YAFFS_TRACE_ALWAYS, (TSTR("Directory has wrong type: %d" TENDSTR), directory->variant_type));
++		YBUG();
++	}
++
++	/* Iterate through the objects in each hash entry */
++
++	ylist_for_each(lh, &directory->variant.dir_variant.children) {
++		if (lh) {
++			listObj = ylist_entry(lh, yaffs_obj_t, siblings);
++			if (listObj->parent != directory) {
++				T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory list has wrong parent %p" TENDSTR), listObj->parent));
++				YBUG();
++			}
++			yaffs_verify_obj_in_dir(listObj);
++		}
++	}
++}
++
++static int yaffs_free_verification_failures;
++
++void yaffs_verify_free_chunks(yaffs_dev_t *dev)
++{
++	int counted;
++	int difference;
++
++	if (yaffs_skip_verification(dev))
++		return;
++
++	counted = yaffs_count_free_chunks(dev);
++
++	difference = dev->n_free_chunks - counted;
++
++	if (difference) {
++		T(YAFFS_TRACE_ALWAYS,
++		  (TSTR("Freechunks verification failure %d %d %d" TENDSTR),
++		   dev->n_free_chunks, counted, difference));
++		yaffs_free_verification_failures++;
++	}
++}
++
++int yaffs_verify_file_sane(yaffs_obj_t *in)
++{
++#if 0
++	int chunk;
++	int n_chunks;
++	int fSize;
++	int failed = 0;
++	int obj_id;
++	yaffs_tnode_t *tn;
++	yaffs_tags_t localTags;
++	yaffs_tags_t *tags = &localTags;
++	int theChunk;
++	int is_deleted;
++
++	if (in->variant_type != YAFFS_OBJECT_TYPE_FILE)
++		return YAFFS_FAIL;
++
++	obj_id = in->obj_id;
++	fSize = in->variant.file_variant.file_size;
++	n_chunks =
++	    (fSize + in->my_dev->data_bytes_per_chunk - 1) / in->my_dev->data_bytes_per_chunk;
++
++	for (chunk = 1; chunk <= n_chunks; chunk++) {
++		tn = yaffs_find_tnode_0(in->my_dev, &in->variant.file_variant,
++					   chunk);
++
++		if (tn) {
++
++			theChunk = yaffs_get_group_base(dev, tn, chunk);
++
++			if (yaffs_check_chunk_bits
++			    (dev, theChunk / dev->param.chunks_per_block,
++			     theChunk % dev->param.chunks_per_block)) {
++
++				yaffs_rd_chunk_tags_nand(in->my_dev, theChunk,
++							    tags,
++							    &is_deleted);
++				if (yaffs_tags_match
++				    (tags, in->obj_id, chunk, is_deleted)) {
++					/* found it; */
++
++				}
++			} else {
++
++				failed = 1;
++			}
++
++		} else {
++			/* T(("No level 0 found for %d\n", chunk)); */
++		}
++	}
++
++	return failed ? YAFFS_FAIL : YAFFS_OK;
++#else
++	in=in;
++	return YAFFS_OK;
++#endif
++}
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffs_verify.h linux-2.6.36-rc8.new/fs/yaffs2/yaffs_verify.h
+--- linux-2.6.36-rc8/fs/yaffs2/yaffs_verify.h	1970-01-01 02:00:00.000000000 +0200
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffs_verify.h	2010-10-20 13:28:16.064000294 +0300
+@@ -0,0 +1,39 @@
++/*
++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2010 Aleph One Ltd.
++ *   for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ */
++
++#ifndef __YAFFS_VERIFY_H__
++#define __YAFFS_VERIFY_H__
++
++#include "yaffs_guts.h"
++
++void yaffs_verify_blk(yaffs_dev_t *dev, yaffs_block_info_t *bi, int n);
++void yaffs_verify_collected_blk(yaffs_dev_t *dev, yaffs_block_info_t *bi, int n);
++void yaffs_verify_blocks(yaffs_dev_t *dev);
++
++void yaffs_verify_oh(yaffs_obj_t *obj, yaffs_obj_header *oh, yaffs_ext_tags *tags, int parentCheck);
++void yaffs_verify_file(yaffs_obj_t *obj);
++void yaffs_verify_link(yaffs_obj_t *obj);
++void yaffs_verify_symlink(yaffs_obj_t *obj);
++void yaffs_verify_special(yaffs_obj_t *obj);
++void yaffs_verify_obj(yaffs_obj_t *obj);
++void yaffs_verify_objects(yaffs_dev_t *dev);
++void yaffs_verify_obj_in_dir(yaffs_obj_t *obj);
++void yaffs_verify_dir(yaffs_obj_t *directory);
++void yaffs_verify_free_chunks(yaffs_dev_t *dev);
++
++int yaffs_verify_file_sane(yaffs_obj_t *obj);
++
++int yaffs_skip_verification(yaffs_dev_t *dev);
++
++#endif
++
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffs_vfs_glue.c linux-2.6.36-rc8.new/fs/yaffs2/yaffs_vfs_glue.c
+--- linux-2.6.36-rc8/fs/yaffs2/yaffs_vfs_glue.c	1970-01-01 02:00:00.000000000 +0200
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffs_vfs_glue.c	2010-10-20 13:28:16.069000294 +0300
+@@ -0,0 +1,3576 @@
++/*
++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2010 Aleph One Ltd.
++ *   for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ * Acknowledgements:
++ * Luc van OostenRyck for numerous patches.
++ * Nick Bane for numerous patches.
++ * Nick Bane for 2.5/2.6 integration.
++ * Andras Toth for mknod rdev issue.
++ * Michael Fischer for finding the problem with inode inconsistency.
++ * Some code bodily lifted from JFFS
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ */
++
++/*
++ *
++ * This is the file system front-end to YAFFS that hooks it up to
++ * the VFS.
++ *
++ * Special notes:
++ * >> 2.4: sb->u.generic_sbp points to the yaffs_dev_t associated with
++ *         this superblock
++ * >> 2.6: sb->s_fs_info  points to the yaffs_dev_t associated with this
++ *         superblock
++ * >> inode->u.generic_ip points to the associated yaffs_obj_t.
++ */
++
++/*
++ * There are two variants of the VFS glue code. This variant should compile
++ * for any version of Linux.
++ */
++#include <linux/version.h>
++
++#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 10))
++#define YAFFS_COMPILE_BACKGROUND
++#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6, 23))
++#define YAFFS_COMPILE_FREEZER
++#endif
++#endif
++
++#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28))
++#define YAFFS_COMPILE_EXPORTFS
++#endif
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,35))
++#define YAFFS_USE_SETATTR_COPY
++#define YAFFS_USE_TRUNCATE_SETSIZE
++#endif
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,35))
++#define YAFFS_HAS_EVICT_INODE
++#endif
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,13))
++#define YAFFS_NEW_FOLLOW_LINK 1
++#else
++#define YAFFS_NEW_FOLLOW_LINK 0
++#endif
++
++#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
++#include <linux/config.h>
++#endif
++
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/slab.h>
++#include <linux/init.h>
++#include <linux/fs.h>
++#include <linux/proc_fs.h>
++#include <linux/smp_lock.h>
++#include <linux/pagemap.h>
++#include <linux/mtd/mtd.h>
++#include <linux/interrupt.h>
++#include <linux/string.h>
++#include <linux/ctype.h>
++
++#if (YAFFS_NEW_FOLLOW_LINK == 1)
++#include <linux/namei.h>
++#endif
++
++#ifdef YAFFS_COMPILE_EXPORTFS
++#include <linux/exportfs.h>
++#endif
++
++#ifdef YAFFS_COMPILE_BACKGROUND
++#include <linux/kthread.h>
++#include <linux/delay.h>
++#endif
++#ifdef YAFFS_COMPILE_FREEZER
++#include <linux/freezer.h>
++#endif
++
++#include <asm/div64.h>
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++
++#include <linux/statfs.h>
++
++#define UnlockPage(p) unlock_page(p)
++#define Page_Uptodate(page)	test_bit(PG_uptodate, &(page)->flags)
++
++/* FIXME: use sb->s_id instead ? */
++#define yaffs_devname(sb, buf)	bdevname(sb->s_bdev, buf)
++
++#else
++
++#include <linux/locks.h>
++#define	BDEVNAME_SIZE		0
++#define	yaffs_devname(sb, buf)	kdevname(sb->s_dev)
++
++#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0))
++/* added NCB 26/5/2006 for 2.4.25-vrs2-tcl1 kernel */
++#define __user
++#endif
++
++#endif
++
++#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26))
++#define YPROC_ROOT  (&proc_root)
++#else
++#define YPROC_ROOT  NULL
++#endif
++
++#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,26))
++#define Y_INIT_TIMER(a)	init_timer(a)
++#else
++#define Y_INIT_TIMER(a)	init_timer_on_stack(a)
++#endif
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
++#define WRITE_SIZE_STR "writesize"
++#define WRITE_SIZE(mtd) ((mtd)->writesize)
++#else
++#define WRITE_SIZE_STR "oobblock"
++#define WRITE_SIZE(mtd) ((mtd)->oobblock)
++#endif
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 27))
++#define YAFFS_USE_WRITE_BEGIN_END 1
++#else
++#define YAFFS_USE_WRITE_BEGIN_END 0
++#endif
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 28))
++static uint32_t YCALCBLOCKS(uint64_t partition_size, uint32_t block_size)
++{
++	uint64_t result = partition_size;
++	do_div(result, block_size);
++	return (uint32_t)result;
++}
++#else
++#define YCALCBLOCKS(s, b) ((s)/(b))
++#endif
++
++#include <linux/uaccess.h>
++#include <linux/mtd/mtd.h>
++
++#include "yportenv.h"
++#include "yaffs_trace.h"
++#include "yaffs_guts.h"
++
++#include "yaffs_linux.h"
++
++#include "yaffs_mtdif.h"
++#include "yaffs_mtdif1.h"
++#include "yaffs_mtdif2.h"
++
++unsigned int yaffs_trace_mask = YAFFS_TRACE_BAD_BLOCKS | YAFFS_TRACE_ALWAYS;
++unsigned int yaffs_wr_attempts = YAFFS_WR_ATTEMPTS;
++unsigned int yaffs_auto_checkpoint = 1;
++unsigned int yaffs_gc_control = 1;
++unsigned int yaffs_bg_enable = 1;
++
++/* Module Parameters */
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++module_param(yaffs_trace_mask, uint, 0644);
++module_param(yaffs_wr_attempts, uint, 0644);
++module_param(yaffs_auto_checkpoint, uint, 0644);
++module_param(yaffs_gc_control, uint, 0644);
++module_param(yaffs_bg_enable, uint, 0644);
++#else
++MODULE_PARM(yaffs_trace_mask, "i");
++MODULE_PARM(yaffs_wr_attempts, "i");
++MODULE_PARM(yaffs_auto_checkpoint, "i");
++MODULE_PARM(yaffs_gc_control, "i");
++#endif
++
++#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25))
++/* use iget and read_inode */
++#define Y_IGET(sb, inum) iget((sb), (inum))
++static void yaffs_read_inode(struct inode *inode);
++
++#else
++/* Call local equivalent */
++#define YAFFS_USE_OWN_IGET
++#define Y_IGET(sb, inum) yaffs_iget((sb), (inum))
++
++static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino);
++#endif
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
++#define yaffs_InodeToObjectLV(iptr) ((iptr)->i_private)
++#else
++#define yaffs_InodeToObjectLV(iptr) ((iptr)->u.generic_ip)
++#endif
++
++#define yaffs_InodeToObject(iptr) ((yaffs_obj_t *)(yaffs_InodeToObjectLV(iptr)))
++#define yaffs_dentry_to_obj(dptr) yaffs_InodeToObject((dptr)->d_inode)
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++#define yaffs_SuperToDevice(sb)	((yaffs_dev_t *)sb->s_fs_info)
++#else
++#define yaffs_SuperToDevice(sb)	((yaffs_dev_t *)sb->u.generic_sbp)
++#endif
++
++
++#define update_dir_time(dir) do {\
++			(dir)->i_ctime = (dir)->i_mtime = CURRENT_TIME; \
++		} while(0)
++		
++static void yaffs_put_super(struct super_block *sb);
++
++static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
++				loff_t *pos);
++static ssize_t yaffs_hold_space(struct file *f);
++static void yaffs_release_space(struct file *f);
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
++static int yaffs_file_flush(struct file *file, fl_owner_t id);
++#else
++static int yaffs_file_flush(struct file *file);
++#endif
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34))
++static int yaffs_sync_object(struct file *file, int datasync);
++#else
++static int yaffs_sync_object(struct file *file, struct dentry *dentry,
++				int datasync);
++#endif
++
++static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir);
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
++			struct nameidata *n);
++static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
++					struct nameidata *n);
++#else
++static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode);
++static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry);
++#endif
++static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
++			struct dentry *dentry);
++static int yaffs_unlink(struct inode *dir, struct dentry *dentry);
++static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
++			const char *symname);
++static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode);
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
++			dev_t dev);
++#else
++static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
++			int dev);
++#endif
++static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
++			struct inode *new_dir, struct dentry *new_dentry);
++static int yaffs_setattr(struct dentry *dentry, struct iattr *attr);
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
++static int yaffs_sync_fs(struct super_block *sb, int wait);
++static void yaffs_write_super(struct super_block *sb);
++#else
++static int yaffs_sync_fs(struct super_block *sb);
++static int yaffs_write_super(struct super_block *sb);
++#endif
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
++static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf);
++#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf);
++#else
++static int yaffs_statfs(struct super_block *sb, struct statfs *buf);
++#endif
++
++#ifdef YAFFS_HAS_PUT_INODE
++static void yaffs_put_inode(struct inode *inode);
++#endif
++
++#ifdef YAFFS_HAS_EVICT_INODE
++static void yaffs_evict_inode(struct inode *);
++#else
++static void yaffs_delete_inode(struct inode *);
++static void yaffs_clear_inode(struct inode *);
++#endif
++
++static int yaffs_readpage(struct file *file, struct page *page);
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++static int yaffs_writepage(struct page *page, struct writeback_control *wbc);
++#else
++static int yaffs_writepage(struct page *page);
++#endif
++
++#ifdef CONFIG_YAFFS_XATTR
++int yaffs_setxattr(struct dentry *dentry, const char *name,
++			const void *value, size_t size, int flags);
++ssize_t yaffs_getxattr(struct dentry *dentry, const char *name, void *buff,
++			size_t size);
++int yaffs_removexattr(struct dentry *dentry, const char *name);
++ssize_t yaffs_listxattr(struct dentry *dentry, char *buff, size_t size);
++#endif
++
++
++#if (YAFFS_USE_WRITE_BEGIN_END != 0)
++static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
++				loff_t pos, unsigned len, unsigned flags,
++				struct page **pagep, void **fsdata);
++static int yaffs_write_end(struct file *filp, struct address_space *mapping,
++				loff_t pos, unsigned len, unsigned copied,
++				struct page *pg, void *fsdadata);
++#else
++static int yaffs_prepare_write(struct file *f, struct page *pg,
++				unsigned offset, unsigned to);
++static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
++				unsigned to);
++
++#endif
++
++static int yaffs_readlink(struct dentry *dentry, char __user *buffer,
++				int buflen);
++#if (YAFFS_NEW_FOLLOW_LINK == 1)
++void yaffs_put_link(struct dentry *dentry, struct nameidata *nd, void *alias);
++static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
++#else
++static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
++#endif
++
++static void yaffs_touch_super(yaffs_dev_t *dev);
++
++static loff_t yaffs_dir_llseek(struct file *file, loff_t offset, int origin);
++
++static int yaffs_vfs_setattr(struct inode *, struct iattr *);
++
++
++static struct address_space_operations yaffs_file_address_operations = {
++	.readpage = yaffs_readpage,
++	.writepage = yaffs_writepage,
++#if (YAFFS_USE_WRITE_BEGIN_END > 0)
++	.write_begin = yaffs_write_begin,
++	.write_end = yaffs_write_end,
++#else
++	.prepare_write = yaffs_prepare_write,
++	.commit_write = yaffs_commit_write,
++#endif
++};
++
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 22))
++static const struct file_operations yaffs_file_operations = {
++	.read = do_sync_read,
++	.write = do_sync_write,
++	.aio_read = generic_file_aio_read,
++	.aio_write = generic_file_aio_write,
++	.mmap = generic_file_mmap,
++	.flush = yaffs_file_flush,
++	.fsync = yaffs_sync_object,
++	.splice_read = generic_file_splice_read,
++	.splice_write = generic_file_splice_write,
++	.llseek = generic_file_llseek,
++};
++
++#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
++
++static const struct file_operations yaffs_file_operations = {
++	.read = do_sync_read,
++	.write = do_sync_write,
++	.aio_read = generic_file_aio_read,
++	.aio_write = generic_file_aio_write,
++	.mmap = generic_file_mmap,
++	.flush = yaffs_file_flush,
++	.fsync = yaffs_sync_object,
++	.sendfile = generic_file_sendfile,
++};
++
++#else
++
++static const struct file_operations yaffs_file_operations = {
++	.read = generic_file_read,
++	.write = generic_file_write,
++	.mmap = generic_file_mmap,
++	.flush = yaffs_file_flush,
++	.fsync = yaffs_sync_object,
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++	.sendfile = generic_file_sendfile,
++#endif
++};
++#endif
++
++#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,25))
++static void zero_user_segment(struct page *page, unsigned start, unsigned end)
++{
++	void * kaddr = kmap_atomic(page, KM_USER0);
++	memset(kaddr + start, 0, end - start);
++	kunmap_atomic(kaddr, KM_USER0);
++	flush_dcache_page(page);
++}
++#endif
++
++
++static const struct inode_operations yaffs_file_inode_operations = {
++	.setattr = yaffs_setattr,
++#ifdef CONFIG_YAFFS_XATTR
++	.setxattr = yaffs_setxattr,
++	.getxattr = yaffs_getxattr,
++	.listxattr = yaffs_listxattr,
++	.removexattr = yaffs_removexattr,
++#endif
++};
++
++static const struct inode_operations yaffs_symlink_inode_operations = {
++	.readlink = yaffs_readlink,
++	.follow_link = yaffs_follow_link,
++#if (YAFFS_NEW_FOLLOW_LINK == 1)
++	.put_link = yaffs_put_link,
++#endif
++	.setattr = yaffs_setattr,
++#ifdef CONFIG_YAFFS_XATTR
++	.setxattr = yaffs_setxattr,
++	.getxattr = yaffs_getxattr,
++	.listxattr = yaffs_listxattr,
++	.removexattr = yaffs_removexattr,
++#endif
++};
++
++static const struct inode_operations yaffs_dir_inode_operations = {
++	.create = yaffs_create,
++	.lookup = yaffs_lookup,
++	.link = yaffs_link,
++	.unlink = yaffs_unlink,
++	.symlink = yaffs_symlink,
++	.mkdir = yaffs_mkdir,
++	.rmdir = yaffs_unlink,
++	.mknod = yaffs_mknod,
++	.rename = yaffs_rename,
++	.setattr = yaffs_setattr,
++#ifdef CONFIG_YAFFS_XATTR
++	.setxattr = yaffs_setxattr,
++	.getxattr = yaffs_getxattr,
++	.listxattr = yaffs_listxattr,
++	.removexattr = yaffs_removexattr,
++#endif
++};
++
++static const struct file_operations yaffs_dir_operations = {
++	.read = generic_read_dir,
++	.readdir = yaffs_readdir,
++	.fsync = yaffs_sync_object,
++	.llseek = yaffs_dir_llseek,
++};
++
++static const struct super_operations yaffs_super_ops = {
++	.statfs = yaffs_statfs,
++
++#ifndef YAFFS_USE_OWN_IGET
++	.read_inode = yaffs_read_inode,
++#endif
++#ifdef YAFFS_HAS_PUT_INODE
++	.put_inode = yaffs_put_inode,
++#endif
++	.put_super = yaffs_put_super,
++#ifdef YAFFS_HAS_EVICT_INODE
++	.evict_inode = yaffs_evict_inode,
++#else
++	.delete_inode = yaffs_delete_inode,
++	.clear_inode = yaffs_clear_inode,
++#endif
++	.sync_fs = yaffs_sync_fs,
++	.write_super = yaffs_write_super,
++};
++
++
++static  int yaffs_vfs_setattr(struct inode *inode, struct iattr *attr)
++{
++#ifdef  YAFFS_USE_SETATTR_COPY
++	setattr_copy(inode,attr);
++	return 0;
++#else
++	return inode_setattr(inode, attr);
++#endif
++
++}
++
++static  int yaffs_vfs_setsize(struct inode *inode, loff_t newsize)
++{
++#ifdef  YAFFS_USE_TRUNCATE_SETSIZE
++	truncate_setsize(inode,newsize);
++	return 0;
++#else
++	truncate_inode_pages(&inode->i_data,newsize);
++	return 0;
++#endif
++
++}
++
++static unsigned yaffs_gc_control_callback(yaffs_dev_t *dev)
++{
++	return yaffs_gc_control;
++}
++                	                                                                                          	
++static void yaffs_gross_lock(yaffs_dev_t *dev)
++{
++	T(YAFFS_TRACE_LOCK, (TSTR("yaffs locking %p\n"), current));
++	down(&(yaffs_dev_to_lc(dev)->grossLock));
++	T(YAFFS_TRACE_LOCK, (TSTR("yaffs locked %p\n"), current));
++}
++
++static void yaffs_gross_unlock(yaffs_dev_t *dev)
++{
++	T(YAFFS_TRACE_LOCK, (TSTR("yaffs unlocking %p\n"), current));
++	up(&(yaffs_dev_to_lc(dev)->grossLock));
++}
++
++#ifdef YAFFS_COMPILE_EXPORTFS
++
++static struct inode *
++yaffs2_nfs_get_inode(struct super_block *sb, uint64_t ino, uint32_t generation)
++{
++	return Y_IGET(sb, ino);
++}
++
++static struct dentry *
++yaffs2_fh_to_dentry(struct super_block *sb, struct fid *fid, int fh_len, int fh_type)
++{
++	return generic_fh_to_dentry(sb, fid, fh_len, fh_type, yaffs2_nfs_get_inode) ;
++}
++
++static struct dentry *
++ yaffs2_fh_to_parent(struct super_block *sb, struct fid *fid, int fh_len, int fh_type)
++{
++	return generic_fh_to_parent(sb, fid, fh_len, fh_type, yaffs2_nfs_get_inode);
++}
++
++struct dentry *yaffs2_get_parent(struct dentry *dentry)
++{
++
++	struct super_block *sb = dentry->d_inode->i_sb;
++	struct dentry *parent = ERR_PTR(-ENOENT);
++	struct inode *inode;
++	unsigned long parent_ino;
++	yaffs_obj_t *d_obj;
++	yaffs_obj_t *parent_obj;
++
++	d_obj = yaffs_InodeToObject(dentry->d_inode);
++
++	if (d_obj) {
++		parent_obj = d_obj->parent;
++		if (parent_obj) {
++			parent_ino = yaffs_get_obj_inode(parent_obj);
++			inode = Y_IGET(sb, parent_ino);
++
++			if (IS_ERR(inode)) {
++				parent = ERR_CAST(inode);
++			} else {
++				parent = d_obtain_alias(inode);
++				if (!IS_ERR(parent)) {
++					parent = ERR_PTR(-ENOMEM);
++					iput(inode);
++				}
++			}
++		}
++	}
++
++	return parent;
++}
++
++/* Just declare a zero structure as a NULL value implies
++ * using the default functions of exportfs.
++ */
++
++static struct export_operations yaffs_export_ops =
++{
++	.fh_to_dentry = yaffs2_fh_to_dentry,
++	.fh_to_parent = yaffs2_fh_to_parent,
++	.get_parent = yaffs2_get_parent,
++} ;
++
++#endif
++
++/*-----------------------------------------------------------------*/
++/* Directory search context allows us to unlock access to yaffs during
++ * filldir without causing problems with the directory being modified.
++ * This is similar to the tried and tested mechanism used in yaffs direct.
++ *
++ * A search context iterates along a doubly linked list of siblings in the
++ * directory. If the iterating object is deleted then this would corrupt
++ * the list iteration, likely causing a crash. The search context avoids
++ * this by using the remove_obj_fn to move the search context to the
++ * next object before the object is deleted.
++ *
++ * Many readdirs (and thus seach conexts) may be alive simulateously so
++ * each yaffs_dev_t has a list of these.
++ *
++ * A seach context lives for the duration of a readdir.
++ *
++ * All these functions must be called while yaffs is locked.
++ */
++
++struct yaffs_SearchContext {
++	yaffs_dev_t *dev;
++	yaffs_obj_t *dirObj;
++	yaffs_obj_t *nextReturn;
++	struct ylist_head others;
++};
++
++/*
++ * yaffs_NewSearch() creates a new search context, initialises it and
++ * adds it to the device's search context list.
++ *
++ * Called at start of readdir.
++ */
++static struct yaffs_SearchContext * yaffs_NewSearch(yaffs_obj_t *dir)
++{
++	yaffs_dev_t *dev = dir->my_dev;
++	struct yaffs_SearchContext *sc = YMALLOC(sizeof(struct yaffs_SearchContext));
++	if(sc){
++		sc->dirObj = dir;
++		sc->dev = dev;
++		if( ylist_empty(&sc->dirObj->variant.dir_variant.children))
++			sc->nextReturn = NULL;
++		else
++			sc->nextReturn = ylist_entry(
++                                dir->variant.dir_variant.children.next,
++				yaffs_obj_t,siblings);
++		YINIT_LIST_HEAD(&sc->others);
++		ylist_add(&sc->others,&(yaffs_dev_to_lc(dev)->searchContexts));
++	}
++	return sc;
++}
++
++/*
++ * yaffs_search_end() disposes of a search context and cleans up.
++ */
++static void yaffs_search_end(struct yaffs_SearchContext * sc)
++{
++	if(sc){
++		ylist_del(&sc->others);
++		YFREE(sc);
++	}
++}
++
++/*
++ * yaffs_search_advance() moves a search context to the next object.
++ * Called when the search iterates or when an object removal causes
++ * the search context to be moved to the next object.
++ */
++static void yaffs_search_advance(struct yaffs_SearchContext *sc)
++{
++        if(!sc)
++                return;
++
++        if( sc->nextReturn == NULL ||
++                ylist_empty(&sc->dirObj->variant.dir_variant.children))
++                sc->nextReturn = NULL;
++        else {
++                struct ylist_head *next = sc->nextReturn->siblings.next;
++
++                if( next == &sc->dirObj->variant.dir_variant.children)
++                        sc->nextReturn = NULL; /* end of list */
++                else
++                        sc->nextReturn = ylist_entry(next,yaffs_obj_t,siblings);
++        }
++}
++
++/*
++ * yaffs_remove_obj_callback() is called when an object is unlinked.
++ * We check open search contexts and advance any which are currently
++ * on the object being iterated.
++ */
++static void yaffs_remove_obj_callback(yaffs_obj_t *obj)
++{
++
++        struct ylist_head *i;
++        struct yaffs_SearchContext *sc;
++        struct ylist_head *search_contexts = &(yaffs_dev_to_lc(obj->my_dev)->searchContexts);
++
++
++        /* Iterate through the directory search contexts.
++         * If any are currently on the object being removed, then advance
++         * the search context to the next object to prevent a hanging pointer.
++         */
++         ylist_for_each(i, search_contexts) {
++                if (i) {
++                        sc = ylist_entry(i, struct yaffs_SearchContext,others);
++                        if(sc->nextReturn == obj)
++                                yaffs_search_advance(sc);
++                }
++	}
++
++}
++
++
++/*-----------------------------------------------------------------*/
++
++static int yaffs_readlink(struct dentry *dentry, char __user *buffer,
++			int buflen)
++{
++	unsigned char *alias;
++	int ret;
++
++	yaffs_dev_t *dev = yaffs_dentry_to_obj(dentry)->my_dev;
++
++	yaffs_gross_lock(dev);
++
++	alias = yaffs_get_symlink_alias(yaffs_dentry_to_obj(dentry));
++
++	yaffs_gross_unlock(dev);
++
++	if (!alias)
++		return -ENOMEM;
++
++	ret = vfs_readlink(dentry, buffer, buflen, alias);
++	kfree(alias);
++	return ret;
++}
++
++#if (YAFFS_NEW_FOLLOW_LINK == 1)
++static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
++#else
++static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
++#endif
++{
++	unsigned char *alias;
++	int ret;
++	yaffs_dev_t *dev = yaffs_dentry_to_obj(dentry)->my_dev;
++
++	yaffs_gross_lock(dev);
++
++	alias = yaffs_get_symlink_alias(yaffs_dentry_to_obj(dentry));
++	yaffs_gross_unlock(dev);
++
++	if (!alias) {
++		ret = -ENOMEM;
++		goto out;
++	}
++
++#if (YAFFS_NEW_FOLLOW_LINK == 1)
++	nd_set_link(nd, alias);
++	ret = (int)alias;
++out:
++	return ERR_PTR(ret);
++#else
++	ret = vfs_follow_link(nd, alias);
++	kfree(alias);
++out:
++	return ret;
++#endif
++}
++
++#if (YAFFS_NEW_FOLLOW_LINK == 1)
++void yaffs_put_link(struct dentry *dentry, struct nameidata *nd, void *alias) {
++	kfree(alias);
++}
++#endif
++
++struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
++				yaffs_obj_t *obj);
++
++/*
++ * Lookup is used to find objects in the fs
++ */
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++
++static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
++				struct nameidata *n)
++#else
++static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry)
++#endif
++{
++	yaffs_obj_t *obj;
++	struct inode *inode = NULL;	/* NCB 2.5/2.6 needs NULL here */
++
++	yaffs_dev_t *dev = yaffs_InodeToObject(dir)->my_dev;
++
++	if(current != yaffs_dev_to_lc(dev)->readdirProcess)
++		yaffs_gross_lock(dev);
++
++	T(YAFFS_TRACE_OS,
++		(TSTR("yaffs_lookup for %d:%s\n"),
++		yaffs_InodeToObject(dir)->obj_id, dentry->d_name.name));
++
++	obj = yaffs_find_by_name(yaffs_InodeToObject(dir),
++					dentry->d_name.name);
++
++	obj = yaffs_get_equivalent_obj(obj);	/* in case it was a hardlink */
++
++	/* Can't hold gross lock when calling yaffs_get_inode() */
++	if(current != yaffs_dev_to_lc(dev)->readdirProcess)
++		yaffs_gross_unlock(dev);
++
++	if (obj) {
++		T(YAFFS_TRACE_OS,
++			(TSTR("yaffs_lookup found %d\n"), obj->obj_id));
++
++		inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
++
++		if (inode) {
++			T(YAFFS_TRACE_OS,
++				(TSTR("yaffs_loookup dentry \n")));
++/* #if 0 asserted by NCB for 2.5/6 compatability - falls through to
++ * d_add even if NULL inode */
++#if 0
++			/*dget(dentry); // try to solve directory bug */
++			d_add(dentry, inode);
++
++			/* return dentry; */
++			return NULL;
++#endif
++		}
++
++	} else {
++		T(YAFFS_TRACE_OS,(TSTR("yaffs_lookup not found\n")));
++
++	}
++
++/* added NCB for 2.5/6 compatability - forces add even if inode is
++ * NULL which creates dentry hash */
++	d_add(dentry, inode);
++
++	return NULL;
++}
++
++
++#ifdef YAFFS_HAS_PUT_INODE
++
++/* For now put inode is just for debugging
++ * Put inode is called when the inode **structure** is put.
++ */
++static void yaffs_put_inode(struct inode *inode)
++{
++	T(YAFFS_TRACE_OS,
++		(TSTR("yaffs_put_inode: ino %d, count %d\n"), (int)inode->i_ino,
++		atomic_read(&inode->i_count)));
++
++}
++#endif
++
++
++static void yaffs_unstitch_obj(struct inode *inode, yaffs_obj_t *obj)
++{
++	/* Clear the association between the inode and
++	 * the yaffs_obj_t.
++	 */
++	obj->my_inode = NULL;
++	yaffs_InodeToObjectLV(inode) = NULL;
++
++	/* If the object freeing was deferred, then the real
++	 * free happens now.
++	 * This should fix the inode inconsistency problem.
++	 */
++	yaffs_handle_defered_free(obj);
++}
++
++#ifdef YAFFS_HAS_EVICT_INODE
++/* yaffs_evict_inode combines into one operation what was previously done in
++ * yaffs_clear_inode() and yaffs_delete_inode()
++ *
++ */
++static void yaffs_evict_inode( struct inode *inode)
++{
++	yaffs_obj_t *obj;
++	yaffs_dev_t *dev;
++	int deleteme = 0;
++
++	obj = yaffs_InodeToObject(inode);
++
++	T(YAFFS_TRACE_OS,
++		(TSTR("yaffs_evict_inode: ino %d, count %d %s\n"), (int)inode->i_ino,
++		atomic_read(&inode->i_count),
++		obj ? "object exists" : "null object"));
++
++	if (!inode->i_nlink && !is_bad_inode(inode))
++		deleteme = 1;
++	truncate_inode_pages(&inode->i_data,0);
++	end_writeback(inode);
++
++	if(deleteme && obj){
++		dev = obj->my_dev;
++		yaffs_gross_lock(dev);
++		yaffs_del_obj(obj);
++		yaffs_gross_unlock(dev);
++	}
++	if (obj) {
++		dev = obj->my_dev;
++		yaffs_gross_lock(dev);
++		yaffs_unstitch_obj(inode,obj);
++		yaffs_gross_unlock(dev);
++	}
++
++
++}
++#else
++
++/* clear is called to tell the fs to release any per-inode data it holds.
++ * The object might still exist on disk and is just being thrown out of the cache
++ * or else the object has actually been deleted and we're being called via
++ * the chain
++ *   yaffs_delete_inode() -> clear_inode()->yaffs_clear_inode()
++ */
++
++static void yaffs_clear_inode(struct inode *inode)
++{
++	yaffs_obj_t *obj;
++	yaffs_dev_t *dev;
++
++	obj = yaffs_InodeToObject(inode);
++
++	T(YAFFS_TRACE_OS,
++		(TSTR("yaffs_clear_inode: ino %d, count %d %s\n"), (int)inode->i_ino,
++		atomic_read(&inode->i_count),
++		obj ? "object exists" : "null object"));
++
++	if (obj) {
++		dev = obj->my_dev;
++		yaffs_gross_lock(dev);
++		yaffs_unstitch_obj(inode,obj);
++		yaffs_gross_unlock(dev);
++	}
++
++}
++
++/* delete is called when the link count is zero and the inode
++ * is put (ie. nobody wants to know about it anymore, time to
++ * delete the file).
++ * NB Must call clear_inode()
++ */
++static void yaffs_delete_inode(struct inode *inode)
++{
++	yaffs_obj_t *obj = yaffs_InodeToObject(inode);
++	yaffs_dev_t *dev;
++
++	T(YAFFS_TRACE_OS,
++		(TSTR("yaffs_delete_inode: ino %d, count %d %s\n"), (int)inode->i_ino,
++		atomic_read(&inode->i_count),
++		obj ? "object exists" : "null object"));
++
++	if (obj) {
++		dev = obj->my_dev;
++		yaffs_gross_lock(dev);
++		yaffs_del_obj(obj);
++		yaffs_gross_unlock(dev);
++	}
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
++	truncate_inode_pages(&inode->i_data, 0);
++#endif
++	clear_inode(inode);
++}
++#endif
++
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
++static int yaffs_file_flush(struct file *file, fl_owner_t id)
++#else
++static int yaffs_file_flush(struct file *file)
++#endif
++{
++	yaffs_obj_t *obj = yaffs_dentry_to_obj(file->f_dentry);
++
++	yaffs_dev_t *dev = obj->my_dev;
++
++	T(YAFFS_TRACE_OS,
++		(TSTR("yaffs_file_flush object %d (%s)\n"), obj->obj_id,
++		obj->dirty ? "dirty" : "clean"));
++
++	yaffs_gross_lock(dev);
++
++	yaffs_flush_file(obj, 1, 0);
++
++	yaffs_gross_unlock(dev);
++
++	return 0;
++}
++
++static int yaffs_readpage_nolock(struct file *f, struct page *pg)
++{
++	/* Lifted from jffs2 */
++
++	yaffs_obj_t *obj;
++	unsigned char *pg_buf;
++	int ret;
++
++	yaffs_dev_t *dev;
++
++	T(YAFFS_TRACE_OS,
++		(TSTR("yaffs_readpage_nolock at %08x, size %08x\n"),
++		(unsigned)(pg->index << PAGE_CACHE_SHIFT),
++		(unsigned)PAGE_CACHE_SIZE));
++
++	obj = yaffs_dentry_to_obj(f->f_dentry);
++
++	dev = obj->my_dev;
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++	BUG_ON(!PageLocked(pg));
++#else
++	if (!PageLocked(pg))
++		PAGE_BUG(pg);
++#endif
++
++	pg_buf = kmap(pg);
++	/* FIXME: Can kmap fail? */
++
++	yaffs_gross_lock(dev);
++
++	ret = yaffs_file_rd(obj, pg_buf,
++				pg->index << PAGE_CACHE_SHIFT,
++				PAGE_CACHE_SIZE);
++
++	yaffs_gross_unlock(dev);
++
++	if (ret >= 0)
++		ret = 0;
++
++	if (ret) {
++		ClearPageUptodate(pg);
++		SetPageError(pg);
++	} else {
++		SetPageUptodate(pg);
++		ClearPageError(pg);
++	}
++
++	flush_dcache_page(pg);
++	kunmap(pg);
++
++	T(YAFFS_TRACE_OS, (TSTR("yaffs_readpage_nolock done\n")));
++	return ret;
++}
++
++static int yaffs_readpage_unlock(struct file *f, struct page *pg)
++{
++	int ret = yaffs_readpage_nolock(f, pg);
++	UnlockPage(pg);
++	return ret;
++}
++
++static int yaffs_readpage(struct file *f, struct page *pg)
++{
++	int ret;
++
++	T(YAFFS_TRACE_OS, (TSTR("yaffs_readpage\n")));
++	ret=yaffs_readpage_unlock(f, pg);
++	T(YAFFS_TRACE_OS, (TSTR("yaffs_readpage done\n")));
++	return ret;
++}
++
++/* writepage inspired by/stolen from smbfs */
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++static int yaffs_writepage(struct page *page, struct writeback_control *wbc)
++#else
++static int yaffs_writepage(struct page *page)
++#endif
++{
++	yaffs_dev_t *dev;
++	struct address_space *mapping = page->mapping;
++	struct inode *inode;
++	unsigned long end_index;
++	char *buffer;
++	yaffs_obj_t *obj;
++	int nWritten = 0;
++	unsigned n_bytes;
++	loff_t i_size;
++
++	if (!mapping)
++		BUG();
++	inode = mapping->host;
++	if (!inode)
++		BUG();
++	i_size = i_size_read(inode);
++
++	end_index = i_size >> PAGE_CACHE_SHIFT;
++
++	if(page->index < end_index)
++		n_bytes = PAGE_CACHE_SIZE;
++	else {
++		n_bytes = i_size & (PAGE_CACHE_SIZE -1);
++
++		if (page->index > end_index || !n_bytes) {
++			T(YAFFS_TRACE_OS,
++				(TSTR("yaffs_writepage at %08x, inode size = %08x!!!\n"),
++				(unsigned)(page->index << PAGE_CACHE_SHIFT),
++				(unsigned)inode->i_size));
++			T(YAFFS_TRACE_OS,
++				(TSTR("                -> don't care!!\n")));
++
++			zero_user_segment(page,0,PAGE_CACHE_SIZE);
++			set_page_writeback(page);
++			unlock_page(page);
++			end_page_writeback(page);
++			return 0;
++		}
++	}
++
++	if(n_bytes != PAGE_CACHE_SIZE)
++		zero_user_segment(page,n_bytes,PAGE_CACHE_SIZE);
++
++	get_page(page);
++
++	buffer = kmap(page);
++
++	obj = yaffs_InodeToObject(inode);
++	dev = obj->my_dev;
++	yaffs_gross_lock(dev);
++
++	T(YAFFS_TRACE_OS,
++		(TSTR("yaffs_writepage at %08x, size %08x\n"),
++		(unsigned)(page->index << PAGE_CACHE_SHIFT), n_bytes));
++	T(YAFFS_TRACE_OS,
++		(TSTR("writepag0: obj = %05x, ino = %05x\n"),
++		(int)obj->variant.file_variant.file_size, (int)inode->i_size));
++
++	nWritten = yaffs_wr_file(obj, buffer,
++			page->index << PAGE_CACHE_SHIFT, n_bytes, 0);
++
++	yaffs_touch_super(dev);
++
++	T(YAFFS_TRACE_OS,
++		(TSTR("writepag1: obj = %05x, ino = %05x\n"),
++		(int)obj->variant.file_variant.file_size, (int)inode->i_size));
++
++	yaffs_gross_unlock(dev);
++
++	kunmap(page);
++	set_page_writeback(page);
++	unlock_page(page);
++	end_page_writeback(page);
++	put_page(page);
++
++	return (nWritten == n_bytes) ? 0 : -ENOSPC;
++}
++
++
++#if (YAFFS_USE_WRITE_BEGIN_END > 0)
++static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
++				loff_t pos, unsigned len, unsigned flags,
++				struct page **pagep, void **fsdata)
++{
++	struct page *pg = NULL;
++	pgoff_t index = pos >> PAGE_CACHE_SHIFT;
++
++	int ret = 0;
++	int space_held = 0;
++
++	/* Get a page */
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28)
++	pg = grab_cache_page_write_begin(mapping, index, flags);
++#else
++	pg = __grab_cache_page(mapping, index);
++#endif
++
++	*pagep = pg;
++	if (!pg) {
++		ret =  -ENOMEM;
++		goto out;
++	}
++	T(YAFFS_TRACE_OS,
++		(TSTR("start yaffs_write_begin index %d(%x) uptodate %d\n"),
++		(int)index,(int)index,Page_Uptodate(pg) ? 1 : 0));
++
++	/* Get fs space */
++	space_held = yaffs_hold_space(filp);
++
++	if (!space_held) {
++		ret = -ENOSPC;
++		goto out;
++	}
++
++	/* Update page if required */
++
++	if (!Page_Uptodate(pg))
++		ret = yaffs_readpage_nolock(filp, pg);
++
++	if (ret)
++		goto out;
++
++	/* Happy path return */
++	T(YAFFS_TRACE_OS, (TSTR("end yaffs_write_begin - ok\n")));
++
++	return 0;
++
++out:
++	T(YAFFS_TRACE_OS,
++		(TSTR("end yaffs_write_begin fail returning %d\n"), ret));
++	if (space_held)
++		yaffs_release_space(filp);
++	if (pg) {
++		unlock_page(pg);
++		page_cache_release(pg);
++	}
++	return ret;
++}
++
++#else
++
++static int yaffs_prepare_write(struct file *f, struct page *pg,
++				unsigned offset, unsigned to)
++{
++	T(YAFFS_TRACE_OS, (TSTR("yaffs_prepair_write\n")));
++
++	if (!Page_Uptodate(pg))
++		return yaffs_readpage_nolock(f, pg);
++	return 0;
++}
++#endif
++
++#if (YAFFS_USE_WRITE_BEGIN_END > 0)
++static int yaffs_write_end(struct file *filp, struct address_space *mapping,
++				loff_t pos, unsigned len, unsigned copied,
++				struct page *pg, void *fsdadata)
++{
++	int ret = 0;
++	void *addr, *kva;
++	uint32_t offset_into_page = pos & (PAGE_CACHE_SIZE - 1);
++
++	kva = kmap(pg);
++	addr = kva + offset_into_page;
++
++	T(YAFFS_TRACE_OS,
++		("yaffs_write_end addr %p pos %x n_bytes %d\n",
++		addr,(unsigned)pos, copied));
++
++	ret = yaffs_file_write(filp, addr, copied, &pos);
++
++	if (ret != copied) {
++		T(YAFFS_TRACE_OS,
++			(TSTR("yaffs_write_end not same size ret %d  copied %d\n"),
++			ret, copied));
++		SetPageError(pg);
++	} else {
++		/* Nothing */
++	}
++
++	kunmap(pg);
++
++	yaffs_release_space(filp);
++	unlock_page(pg);
++	page_cache_release(pg);
++	return ret;
++}
++#else
++
++static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
++				unsigned to)
++{
++	void *addr, *kva;
++
++	loff_t pos = (((loff_t) pg->index) << PAGE_CACHE_SHIFT) + offset;
++	int n_bytes = to - offset;
++	int nWritten;
++
++	unsigned spos = pos;
++	unsigned saddr;
++
++	kva = kmap(pg);
++	addr = kva + offset;
++
++	saddr = (unsigned) addr;
++
++	T(YAFFS_TRACE_OS,
++		(TSTR("yaffs_commit_write addr %x pos %x n_bytes %d\n"),
++		saddr, spos, n_bytes));
++
++	nWritten = yaffs_file_write(f, addr, n_bytes, &pos);
++
++	if (nWritten != n_bytes) {
++		T(YAFFS_TRACE_OS,
++			(TSTR("yaffs_commit_write not same size nWritten %d  n_bytes %d\n"),
++			nWritten, n_bytes));
++		SetPageError(pg);
++	} else {
++		/* Nothing */
++	}
++
++	kunmap(pg);
++
++	T(YAFFS_TRACE_OS,
++		(TSTR("yaffs_commit_write returning %d\n"),
++		nWritten == n_bytes ? 0 : nWritten));
++
++	return nWritten == n_bytes ? 0 : nWritten;
++}
++#endif
++
++
++static void yaffs_fill_inode_from_obj(struct inode *inode, yaffs_obj_t *obj)
++{
++	if (inode && obj) {
++
++
++		/* Check mode against the variant type and attempt to repair if broken. */
++		__u32 mode = obj->yst_mode;
++		switch (obj->variant_type) {
++		case YAFFS_OBJECT_TYPE_FILE:
++			if (!S_ISREG(mode)) {
++				obj->yst_mode &= ~S_IFMT;
++				obj->yst_mode |= S_IFREG;
++			}
++
++			break;
++		case YAFFS_OBJECT_TYPE_SYMLINK:
++			if (!S_ISLNK(mode)) {
++				obj->yst_mode &= ~S_IFMT;
++				obj->yst_mode |= S_IFLNK;
++			}
++
++			break;
++		case YAFFS_OBJECT_TYPE_DIRECTORY:
++			if (!S_ISDIR(mode)) {
++				obj->yst_mode &= ~S_IFMT;
++				obj->yst_mode |= S_IFDIR;
++			}
++
++			break;
++		case YAFFS_OBJECT_TYPE_UNKNOWN:
++		case YAFFS_OBJECT_TYPE_HARDLINK:
++		case YAFFS_OBJECT_TYPE_SPECIAL:
++		default:
++			/* TODO? */
++			break;
++		}
++
++		inode->i_flags |= S_NOATIME;
++
++		inode->i_ino = obj->obj_id;
++		inode->i_mode = obj->yst_mode;
++		inode->i_uid = obj->yst_uid;
++		inode->i_gid = obj->yst_gid;
++#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
++		inode->i_blksize = inode->i_sb->s_blocksize;
++#endif
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++
++		inode->i_rdev = old_decode_dev(obj->yst_rdev);
++		inode->i_atime.tv_sec = (time_t) (obj->yst_atime);
++		inode->i_atime.tv_nsec = 0;
++		inode->i_mtime.tv_sec = (time_t) obj->yst_mtime;
++		inode->i_mtime.tv_nsec = 0;
++		inode->i_ctime.tv_sec = (time_t) obj->yst_ctime;
++		inode->i_ctime.tv_nsec = 0;
++#else
++		inode->i_rdev = obj->yst_rdev;
++		inode->i_atime = obj->yst_atime;
++		inode->i_mtime = obj->yst_mtime;
++		inode->i_ctime = obj->yst_ctime;
++#endif
++		inode->i_size = yaffs_get_obj_length(obj);
++		inode->i_blocks = (inode->i_size + 511) >> 9;
++
++		inode->i_nlink = yaffs_get_obj_link_count(obj);
++
++		T(YAFFS_TRACE_OS,
++			(TSTR("yaffs_fill_inode mode %x uid %d gid %d size %d count %d\n"),
++			inode->i_mode, inode->i_uid, inode->i_gid,
++			(int)inode->i_size, atomic_read(&inode->i_count)));
++
++		switch (obj->yst_mode & S_IFMT) {
++		default:	/* fifo, device or socket */
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++			init_special_inode(inode, obj->yst_mode,
++					old_decode_dev(obj->yst_rdev));
++#else
++			init_special_inode(inode, obj->yst_mode,
++					(dev_t) (obj->yst_rdev));
++#endif
++			break;
++		case S_IFREG:	/* file */
++			inode->i_op = &yaffs_file_inode_operations;
++			inode->i_fop = &yaffs_file_operations;
++			inode->i_mapping->a_ops =
++				&yaffs_file_address_operations;
++			break;
++		case S_IFDIR:	/* directory */
++			inode->i_op = &yaffs_dir_inode_operations;
++			inode->i_fop = &yaffs_dir_operations;
++			break;
++		case S_IFLNK:	/* symlink */
++			inode->i_op = &yaffs_symlink_inode_operations;
++			break;
++		}
++
++		yaffs_InodeToObjectLV(inode) = obj;
++
++		obj->my_inode = inode;
++
++	} else {
++		T(YAFFS_TRACE_OS,
++			(TSTR("yaffs_FileInode invalid parameters\n")));
++	}
++
++}
++
++struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
++				yaffs_obj_t *obj)
++{
++	struct inode *inode;
++
++	if (!sb) {
++		T(YAFFS_TRACE_OS,
++			(TSTR("yaffs_get_inode for NULL super_block!!\n")));
++		return NULL;
++
++	}
++
++	if (!obj) {
++		T(YAFFS_TRACE_OS,
++			(TSTR("yaffs_get_inode for NULL object!!\n")));
++		return NULL;
++
++	}
++
++	T(YAFFS_TRACE_OS,
++		(TSTR("yaffs_get_inode for object %d\n"), obj->obj_id));
++
++	inode = Y_IGET(sb, obj->obj_id);
++	if (IS_ERR(inode))
++		return NULL;
++
++	/* NB Side effect: iget calls back to yaffs_read_inode(). */
++	/* iget also increments the inode's i_count */
++	/* NB You can't be holding grossLock or deadlock will happen! */
++
++	return inode;
++}
++
++static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
++				loff_t *pos)
++{
++	yaffs_obj_t *obj;
++	int nWritten, ipos;
++	struct inode *inode;
++	yaffs_dev_t *dev;
++
++	obj = yaffs_dentry_to_obj(f->f_dentry);
++
++	dev = obj->my_dev;
++
++	yaffs_gross_lock(dev);
++
++	inode = f->f_dentry->d_inode;
++
++	if (!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND)
++		ipos = inode->i_size;
++	else
++		ipos = *pos;
++
++	if (!obj)
++		T(YAFFS_TRACE_OS,
++			(TSTR("yaffs_file_write: hey obj is null!\n")));
++	else
++		T(YAFFS_TRACE_OS,
++			(TSTR("yaffs_file_write about to write writing %u(%x) bytes"
++			"to object %d at %d(%x)\n"),
++			(unsigned) n, (unsigned) n, obj->obj_id, ipos,ipos));
++
++	nWritten = yaffs_wr_file(obj, buf, ipos, n, 0);
++
++	yaffs_touch_super(dev);
++
++	T(YAFFS_TRACE_OS,
++		(TSTR("yaffs_file_write: %d(%x) bytes written\n"),
++		(unsigned )n,(unsigned)n));
++
++	if (nWritten > 0) {
++		ipos += nWritten;
++		*pos = ipos;
++		if (ipos > inode->i_size) {
++			inode->i_size = ipos;
++			inode->i_blocks = (ipos + 511) >> 9;
++
++			T(YAFFS_TRACE_OS,
++				(TSTR("yaffs_file_write size updated to %d bytes, "
++				"%d blocks\n"),
++				ipos, (int)(inode->i_blocks)));
++		}
++
++	}
++	yaffs_gross_unlock(dev);
++	return (nWritten == 0) && (n > 0) ? -ENOSPC : nWritten;
++}
++
++/* Space holding and freeing is done to ensure we have space available for write_begin/end */
++/* For now we just assume few parallel writes and check against a small number. */
++/* Todo: need to do this with a counter to handle parallel reads better */
++
++static ssize_t yaffs_hold_space(struct file *f)
++{
++	yaffs_obj_t *obj;
++	yaffs_dev_t *dev;
++
++	int n_free_chunks;
++
++
++	obj = yaffs_dentry_to_obj(f->f_dentry);
++
++	dev = obj->my_dev;
++
++	yaffs_gross_lock(dev);
++
++	n_free_chunks = yaffs_get_n_free_chunks(dev);
++
++	yaffs_gross_unlock(dev);
++
++	return (n_free_chunks > 20) ? 1 : 0;
++}
++
++static void yaffs_release_space(struct file *f)
++{
++	yaffs_obj_t *obj;
++	yaffs_dev_t *dev;
++
++
++	obj = yaffs_dentry_to_obj(f->f_dentry);
++
++	dev = obj->my_dev;
++
++	yaffs_gross_lock(dev);
++
++
++	yaffs_gross_unlock(dev);
++}
++
++
++static loff_t yaffs_dir_llseek(struct file *file, loff_t offset, int origin)
++{
++	long long retval;
++
++	lock_kernel();
++
++	switch (origin){
++	case 2:
++		offset += i_size_read(file->f_path.dentry->d_inode);
++		break;
++	case 1:
++		offset += file->f_pos;
++	}
++	retval = -EINVAL;
++
++	if (offset >= 0){
++		if (offset != file->f_pos)
++			file->f_pos = offset;
++
++		retval = offset;
++	}
++	unlock_kernel();
++	return retval;
++}
++
++
++static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
++{
++	yaffs_obj_t *obj;
++	yaffs_dev_t *dev;
++        struct yaffs_SearchContext *sc;
++	struct inode *inode = f->f_dentry->d_inode;
++	unsigned long offset, curoffs;
++	yaffs_obj_t *l;
++        int retVal = 0;
++
++	char name[YAFFS_MAX_NAME_LENGTH + 1];
++
++	obj = yaffs_dentry_to_obj(f->f_dentry);
++	dev = obj->my_dev;
++
++	yaffs_gross_lock(dev);
++
++	yaffs_dev_to_lc(dev)->readdirProcess = current;
++
++	offset = f->f_pos;
++
++        sc = yaffs_NewSearch(obj);
++        if(!sc){
++                retVal = -ENOMEM;
++                goto out;
++        }
++
++	T(YAFFS_TRACE_OS, (TSTR("yaffs_readdir: starting at %d\n"), (int)offset));
++
++	if (offset == 0) {
++		T(YAFFS_TRACE_OS,
++			(TSTR("yaffs_readdir: entry . ino %d \n"),
++			(int)inode->i_ino));
++		yaffs_gross_unlock(dev);
++		if (filldir(dirent, ".", 1, offset, inode->i_ino, DT_DIR) < 0){
++			yaffs_gross_lock(dev);
++			goto out;
++		}
++		yaffs_gross_lock(dev);
++		offset++;
++		f->f_pos++;
++	}
++	if (offset == 1) {
++		T(YAFFS_TRACE_OS,
++			(TSTR("yaffs_readdir: entry .. ino %d \n"),
++			(int)f->f_dentry->d_parent->d_inode->i_ino));
++		yaffs_gross_unlock(dev);
++		if (filldir(dirent, "..", 2, offset,
++			f->f_dentry->d_parent->d_inode->i_ino, DT_DIR) < 0){
++			yaffs_gross_lock(dev);
++			goto out;
++		}
++		yaffs_gross_lock(dev);
++		offset++;
++		f->f_pos++;
++	}
++
++	curoffs = 1;
++
++	/* If the directory has changed since the open or last call to
++	   readdir, rewind to after the 2 canned entries. */
++	if (f->f_version != inode->i_version) {
++		offset = 2;
++		f->f_pos = offset;
++		f->f_version = inode->i_version;
++	}
++
++	while(sc->nextReturn){
++		curoffs++;
++                l = sc->nextReturn;
++		if (curoffs >= offset) {
++                        int this_inode = yaffs_get_obj_inode(l);
++                        int this_type = yaffs_get_obj_type(l);
++
++			yaffs_get_obj_name(l, name,
++					    YAFFS_MAX_NAME_LENGTH + 1);
++			T(YAFFS_TRACE_OS,
++			  (TSTR("yaffs_readdir: %s inode %d\n"),
++			  name, yaffs_get_obj_inode(l)));
++
++                        yaffs_gross_unlock(dev);
++
++			if (filldir(dirent,
++					name,
++					strlen(name),
++					offset,
++					this_inode,
++					this_type) < 0){
++				yaffs_gross_lock(dev);
++				goto out;
++			}
++
++                        yaffs_gross_lock(dev);
++
++			offset++;
++			f->f_pos++;
++		}
++                yaffs_search_advance(sc);
++	}
++
++out:
++	yaffs_search_end(sc);
++	yaffs_dev_to_lc(dev)->readdirProcess = NULL;
++	yaffs_gross_unlock(dev);
++
++	return retVal;
++}
++
++
++
++/*
++ * File creation. Allocate an inode, and we're done..
++ */
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
++#define YCRED(x) x
++#else
++#define YCRED(x) (x->cred)
++#endif
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
++			dev_t rdev)
++#else
++static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
++			int rdev)
++#endif
++{
++	struct inode *inode;
++
++	yaffs_obj_t *obj = NULL;
++	yaffs_dev_t *dev;
++
++	yaffs_obj_t *parent = yaffs_InodeToObject(dir);
++
++	int error = -ENOSPC;
++	uid_t uid = YCRED(current)->fsuid;
++	gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid;
++
++	if ((dir->i_mode & S_ISGID) && S_ISDIR(mode))
++		mode |= S_ISGID;
++
++	if (parent) {
++		T(YAFFS_TRACE_OS,
++			(TSTR("yaffs_mknod: parent object %d type %d\n"),
++			parent->obj_id, parent->variant_type));
++	} else {
++		T(YAFFS_TRACE_OS,
++			(TSTR("yaffs_mknod: could not get parent object\n")));
++		return -EPERM;
++	}
++
++	T(YAFFS_TRACE_OS, (TSTR("yaffs_mknod: making oject for %s, "
++			"mode %x dev %x\n"),
++			dentry->d_name.name, mode, rdev));
++
++	dev = parent->my_dev;
++
++	yaffs_gross_lock(dev);
++
++	switch (mode & S_IFMT) {
++	default:
++		/* Special (socket, fifo, device...) */
++		T(YAFFS_TRACE_OS, (TSTR("yaffs_mknod: making special\n")));
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++		obj = yaffs_create_special(parent, dentry->d_name.name, mode, uid,
++				gid, old_encode_dev(rdev));
++#else
++		obj = yaffs_create_special(parent, dentry->d_name.name, mode, uid,
++				gid, rdev);
++#endif
++		break;
++	case S_IFREG:		/* file          */
++		T(YAFFS_TRACE_OS, (TSTR("yaffs_mknod: making file\n")));
++		obj = yaffs_create_file(parent, dentry->d_name.name, mode, uid,
++				gid);
++		break;
++	case S_IFDIR:		/* directory */
++		T(YAFFS_TRACE_OS,
++			(TSTR("yaffs_mknod: making directory\n")));
++		obj = yaffs_create_dir(parent, dentry->d_name.name, mode,
++					uid, gid);
++		break;
++	case S_IFLNK:		/* symlink */
++		T(YAFFS_TRACE_OS, (TSTR("yaffs_mknod: making symlink\n")));
++		obj = NULL;	/* Do we ever get here? */
++		break;
++	}
++
++	/* Can not call yaffs_get_inode() with gross lock held */
++	yaffs_gross_unlock(dev);
++
++	if (obj) {
++		inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj);
++		d_instantiate(dentry, inode);
++		update_dir_time(dir);
++		T(YAFFS_TRACE_OS,
++			(TSTR("yaffs_mknod created object %d count = %d\n"),
++			obj->obj_id, atomic_read(&inode->i_count)));
++		error = 0;
++		yaffs_fill_inode_from_obj(dir,parent);
++	} else {
++		T(YAFFS_TRACE_OS,
++			(TSTR("yaffs_mknod failed making object\n")));
++		error = -ENOMEM;
++	}
++
++	return error;
++}
++
++static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
++{
++	int retVal;
++	T(YAFFS_TRACE_OS, (TSTR("yaffs_mkdir\n")));
++	retVal = yaffs_mknod(dir, dentry, mode | S_IFDIR, 0);
++	return retVal;
++}
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
++			struct nameidata *n)
++#else
++static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode)
++#endif
++{
++	T(YAFFS_TRACE_OS,(TSTR("yaffs_create\n")));
++	return yaffs_mknod(dir, dentry, mode | S_IFREG, 0);
++}
++
++static int yaffs_unlink(struct inode *dir, struct dentry *dentry)
++{
++	int retVal;
++
++	yaffs_dev_t *dev;
++	yaffs_obj_t *obj;
++
++	T(YAFFS_TRACE_OS,
++		(TSTR("yaffs_unlink %d:%s\n"),
++		(int)(dir->i_ino),
++		dentry->d_name.name));
++	obj = yaffs_InodeToObject(dir);
++	dev = obj->my_dev;
++
++	yaffs_gross_lock(dev);
++
++	retVal = yaffs_unlinker(obj, dentry->d_name.name);
++
++	if (retVal == YAFFS_OK) {
++		dentry->d_inode->i_nlink--;
++		dir->i_version++;
++		yaffs_gross_unlock(dev);
++		mark_inode_dirty(dentry->d_inode);
++		update_dir_time(dir);
++		return 0;
++	}
++	yaffs_gross_unlock(dev);
++	return -ENOTEMPTY;
++}
++
++/*
++ * Create a link...
++ */
++static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
++			struct dentry *dentry)
++{
++	struct inode *inode = old_dentry->d_inode;
++	yaffs_obj_t *obj = NULL;
++	yaffs_obj_t *link = NULL;
++	yaffs_dev_t *dev;
++
++	T(YAFFS_TRACE_OS, (TSTR("yaffs_link\n")));
++
++	obj = yaffs_InodeToObject(inode);
++	dev = obj->my_dev;
++
++	yaffs_gross_lock(dev);
++
++	if (!S_ISDIR(inode->i_mode))		/* Don't link directories */
++		link = yaffs_link_obj(yaffs_InodeToObject(dir), dentry->d_name.name,
++			obj);
++
++	if (link) {
++		old_dentry->d_inode->i_nlink = yaffs_get_obj_link_count(obj);
++		d_instantiate(dentry, old_dentry->d_inode);
++		atomic_inc(&old_dentry->d_inode->i_count);
++		T(YAFFS_TRACE_OS,
++			(TSTR("yaffs_link link count %d i_count %d\n"),
++			old_dentry->d_inode->i_nlink,
++			atomic_read(&old_dentry->d_inode->i_count)));
++	}
++
++	yaffs_gross_unlock(dev);
++
++	if (link){
++		update_dir_time(dir);
++		return 0;
++	}
++
++	return -EPERM;
++}
++
++static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
++				const char *symname)
++{
++	yaffs_obj_t *obj;
++	yaffs_dev_t *dev;
++	uid_t uid = YCRED(current)->fsuid;
++	gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid;
++
++	T(YAFFS_TRACE_OS, (TSTR("yaffs_symlink\n")));
++
++	dev = yaffs_InodeToObject(dir)->my_dev;
++	yaffs_gross_lock(dev);
++	obj = yaffs_create_symlink(yaffs_InodeToObject(dir), dentry->d_name.name,
++				S_IFLNK | S_IRWXUGO, uid, gid, symname);
++	yaffs_gross_unlock(dev);
++
++	if (obj) {
++		struct inode *inode;
++
++		inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
++		d_instantiate(dentry, inode);
++		update_dir_time(dir);
++		T(YAFFS_TRACE_OS, (TSTR("symlink created OK\n")));
++		return 0;
++	} else {
++		T(YAFFS_TRACE_OS, (TSTR("symlink not created\n")));
++	}
++
++	return -ENOMEM;
++}
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34))
++static int yaffs_sync_object(struct file *file, int datasync)
++#else
++static int yaffs_sync_object(struct file *file, struct dentry *dentry,
++				int datasync)
++#endif
++{
++
++	yaffs_obj_t *obj;
++	yaffs_dev_t *dev;
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34))
++	struct dentry *dentry = file->f_path.dentry;
++#endif
++
++	obj = yaffs_dentry_to_obj(dentry);
++
++	dev = obj->my_dev;
++
++	T(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC,
++		(TSTR("yaffs_sync_object\n")));
++	yaffs_gross_lock(dev);
++	yaffs_flush_file(obj, 1, datasync);
++	yaffs_gross_unlock(dev);
++	return 0;
++}
++
++/*
++ * The VFS layer already does all the dentry stuff for rename.
++ *
++ * NB: POSIX says you can rename an object over an old object of the same name
++ */
++static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
++			struct inode *new_dir, struct dentry *new_dentry)
++{
++	yaffs_dev_t *dev;
++	int retVal = YAFFS_FAIL;
++	yaffs_obj_t *target;
++
++	T(YAFFS_TRACE_OS, (TSTR("yaffs_rename\n")));
++	dev = yaffs_InodeToObject(old_dir)->my_dev;
++
++	yaffs_gross_lock(dev);
++
++	/* Check if the target is an existing directory that is not empty. */
++	target = yaffs_find_by_name(yaffs_InodeToObject(new_dir),
++				new_dentry->d_name.name);
++
++
++
++	if (target && target->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY &&
++		!ylist_empty(&target->variant.dir_variant.children)) {
++
++		T(YAFFS_TRACE_OS, (TSTR("target is non-empty dir\n")));
++
++		retVal = YAFFS_FAIL;
++	} else {
++		/* Now does unlinking internally using shadowing mechanism */
++		T(YAFFS_TRACE_OS, (TSTR("calling yaffs_rename_obj\n")));
++
++		retVal = yaffs_rename_obj(yaffs_InodeToObject(old_dir),
++				old_dentry->d_name.name,
++				yaffs_InodeToObject(new_dir),
++				new_dentry->d_name.name);
++	}
++	yaffs_gross_unlock(dev);
++
++	if (retVal == YAFFS_OK) {
++		if (target) {
++			new_dentry->d_inode->i_nlink--;
++			mark_inode_dirty(new_dentry->d_inode);
++		}
++		
++		update_dir_time(old_dir);
++		if(old_dir != new_dir)
++			update_dir_time(new_dir);
++		return 0;
++	} else {
++		return -ENOTEMPTY;
++	}
++}
++
++static int yaffs_setattr(struct dentry *dentry, struct iattr *attr)
++{
++	struct inode *inode = dentry->d_inode;
++	int error = 0;
++	yaffs_dev_t *dev;
++
++	T(YAFFS_TRACE_OS,
++		(TSTR("yaffs_setattr of object %d\n"),
++		yaffs_InodeToObject(inode)->obj_id));
++
++	/* Fail if a requested resize >= 2GB */		
++	if (attr->ia_valid & ATTR_SIZE &&
++		(attr->ia_size >> 31))
++		error = -EINVAL;
++
++	if (error == 0)
++		error = inode_change_ok(inode, attr);
++	if (error == 0) {
++		int result;
++		if (!error){
++			error = yaffs_vfs_setattr(inode, attr);
++			T(YAFFS_TRACE_OS,(TSTR("inode_setattr called\n")));
++			if (attr->ia_valid & ATTR_SIZE){
++                        	yaffs_vfs_setsize(inode,attr->ia_size);
++                        	inode->i_blocks = (inode->i_size + 511) >> 9;
++			}
++		}
++		dev = yaffs_InodeToObject(inode)->my_dev;
++		if (attr->ia_valid & ATTR_SIZE){
++			T(YAFFS_TRACE_OS,(TSTR("resize to %d(%x)\n"),
++				(int)(attr->ia_size),(int)(attr->ia_size)));
++		}
++		yaffs_gross_lock(dev);
++		result = yaffs_set_attribs(yaffs_InodeToObject(inode), attr);
++		if(result == YAFFS_OK) {
++			error = 0;
++		} else {
++			error = -EPERM;
++		}
++		yaffs_gross_unlock(dev);
++
++	}
++
++	T(YAFFS_TRACE_OS,
++		(TSTR("yaffs_setattr done returning %d\n"),error));
++
++	return error;
++}
++
++#ifdef CONFIG_YAFFS_XATTR
++int yaffs_setxattr(struct dentry *dentry, const char *name,
++			const void *value, size_t size, int flags)
++{
++	struct inode *inode = dentry->d_inode;
++	int error = 0;
++	yaffs_dev_t *dev;
++	yaffs_obj_t *obj = yaffs_InodeToObject(inode);
++
++	T(YAFFS_TRACE_OS,
++		(TSTR("yaffs_setxattr of object %d\n"),
++		obj->obj_id));
++
++
++	if (error == 0) {
++		int result;
++		dev = obj->my_dev;
++		yaffs_gross_lock(dev);
++		result = yaffs_set_xattrib(obj, name, value, size, flags);
++		if(result == YAFFS_OK)
++			error = 0;
++		else if(result < 0)
++			error = result;
++		yaffs_gross_unlock(dev);
++
++	}
++	T(YAFFS_TRACE_OS,
++		(TSTR("yaffs_setxattr done returning %d\n"),error));
++
++	return error;
++}
++
++
++ssize_t yaffs_getxattr(struct dentry *dentry, const char *name, void *buff,
++			size_t size)
++{
++	struct inode *inode = dentry->d_inode;
++	int error = 0;
++	yaffs_dev_t *dev;
++	yaffs_obj_t *obj = yaffs_InodeToObject(inode);
++
++	T(YAFFS_TRACE_OS,
++		(TSTR("yaffs_getxattr \"%s\" from object %d\n"),
++		name, obj->obj_id));
++
++	if (error == 0) {
++		dev = obj->my_dev;
++		yaffs_gross_lock(dev);
++		error = yaffs_get_xattrib(obj, name, buff, size);
++		yaffs_gross_unlock(dev);
++
++	}
++	T(YAFFS_TRACE_OS,
++		(TSTR("yaffs_getxattr done returning %d\n"),error));
++
++	return error;
++}
++
++int yaffs_removexattr(struct dentry *dentry, const char *name)
++{
++	struct inode *inode = dentry->d_inode;
++	int error = 0;
++	yaffs_dev_t *dev;
++	yaffs_obj_t *obj = yaffs_InodeToObject(inode);
++
++	T(YAFFS_TRACE_OS,
++		(TSTR("yaffs_removexattr of object %d\n"),
++		obj->obj_id));
++
++
++	if (error == 0) {
++		int result;
++		dev = obj->my_dev;
++		yaffs_gross_lock(dev);
++		result = yaffs_remove_xattrib(obj, name);
++		if(result == YAFFS_OK)
++			error = 0;
++		else if(result < 0)
++			error = result;
++		yaffs_gross_unlock(dev);
++
++	}
++	T(YAFFS_TRACE_OS,
++		(TSTR("yaffs_removexattr done returning %d\n"),error));
++
++	return error;
++}
++
++ssize_t yaffs_listxattr(struct dentry *dentry, char *buff, size_t size)
++{
++	struct inode *inode = dentry->d_inode;
++	int error = 0;
++	yaffs_dev_t *dev;
++	yaffs_obj_t *obj = yaffs_InodeToObject(inode);
++
++	T(YAFFS_TRACE_OS,
++		(TSTR("yaffs_listxattr of object %d\n"),
++		obj->obj_id));
++
++
++	if (error == 0) {
++		dev = obj->my_dev;
++		yaffs_gross_lock(dev);
++		error = yaffs_list_xattrib(obj, buff, size);
++		yaffs_gross_unlock(dev);
++
++	}
++	T(YAFFS_TRACE_OS,
++		(TSTR("yaffs_listxattr done returning %d\n"),error));
++
++	return error;
++}
++
++#endif
++
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
++static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf)
++{
++	yaffs_dev_t *dev = yaffs_dentry_to_obj(dentry)->my_dev;
++	struct super_block *sb = dentry->d_sb;
++#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf)
++{
++	yaffs_dev_t *dev = yaffs_SuperToDevice(sb);
++#else
++static int yaffs_statfs(struct super_block *sb, struct statfs *buf)
++{
++	yaffs_dev_t *dev = yaffs_SuperToDevice(sb);
++#endif
++
++	T(YAFFS_TRACE_OS, (TSTR("yaffs_statfs\n")));
++
++	yaffs_gross_lock(dev);
++
++	buf->f_type = YAFFS_MAGIC;
++	buf->f_bsize = sb->s_blocksize;
++	buf->f_namelen = 255;
++
++	if (dev->data_bytes_per_chunk & (dev->data_bytes_per_chunk - 1)) {
++		/* Do this if chunk size is not a power of 2 */
++
++		uint64_t bytesInDev;
++		uint64_t bytesFree;
++
++		bytesInDev = ((uint64_t)((dev->param.end_block - dev->param.start_block + 1))) *
++			((uint64_t)(dev->param.chunks_per_block * dev->data_bytes_per_chunk));
++
++		do_div(bytesInDev, sb->s_blocksize); /* bytesInDev becomes the number of blocks */
++		buf->f_blocks = bytesInDev;
++
++		bytesFree  = ((uint64_t)(yaffs_get_n_free_chunks(dev))) *
++			((uint64_t)(dev->data_bytes_per_chunk));
++
++		do_div(bytesFree, sb->s_blocksize);
++
++		buf->f_bfree = bytesFree;
++
++	} else if (sb->s_blocksize > dev->data_bytes_per_chunk) {
++
++		buf->f_blocks =
++			(dev->param.end_block - dev->param.start_block + 1) *
++			dev->param.chunks_per_block /
++			(sb->s_blocksize / dev->data_bytes_per_chunk);
++		buf->f_bfree =
++			yaffs_get_n_free_chunks(dev) /
++			(sb->s_blocksize / dev->data_bytes_per_chunk);
++	} else {
++		buf->f_blocks =
++			(dev->param.end_block - dev->param.start_block + 1) *
++			dev->param.chunks_per_block *
++			(dev->data_bytes_per_chunk / sb->s_blocksize);
++
++		buf->f_bfree =
++			yaffs_get_n_free_chunks(dev) *
++			(dev->data_bytes_per_chunk / sb->s_blocksize);
++	}
++
++	buf->f_files = 0;
++	buf->f_ffree = 0;
++	buf->f_bavail = buf->f_bfree;
++
++	yaffs_gross_unlock(dev);
++	return 0;
++}
++
++
++
++static void yaffs_flush_inodes(struct super_block *sb)
++{
++	struct inode *iptr;
++	yaffs_obj_t *obj;
++	
++	list_for_each_entry(iptr,&sb->s_inodes, i_sb_list){
++		obj = yaffs_InodeToObject(iptr);
++		if(obj){
++			T(YAFFS_TRACE_OS, (TSTR("flushing obj %d\n"),
++				obj->obj_id));
++			yaffs_flush_file(obj,1,0);
++		}
++	}
++}
++
++
++static void yaffs_flush_super(struct super_block *sb, int do_checkpoint)
++{
++	yaffs_dev_t *dev = yaffs_SuperToDevice(sb);	
++	if(!dev)
++		return;
++	
++	yaffs_flush_inodes(sb);
++	yaffs_update_dirty_dirs(dev);
++	yaffs_flush_whole_cache(dev);
++	if(do_checkpoint)
++		yaffs_checkpoint_save(dev);
++}
++
++
++static unsigned yaffs_bg_gc_urgency(yaffs_dev_t *dev)
++{
++	unsigned erasedChunks = dev->n_erased_blocks * dev->param.chunks_per_block;
++	struct yaffs_LinuxContext *context = yaffs_dev_to_lc(dev);
++	unsigned scatteredFree = 0; /* Free chunks not in an erased block */
++
++	if(erasedChunks < dev->n_free_chunks)
++		scatteredFree = (dev->n_free_chunks - erasedChunks);
++
++	if(!context->bgRunning)
++		return 0;
++	else if(scatteredFree < (dev->param.chunks_per_block * 2))
++		return 0;
++	else if(erasedChunks > dev->n_free_chunks/2)
++		return 0;
++	else if(erasedChunks > dev->n_free_chunks/4)
++		return 1;
++	else
++		return 2;
++}
++
++static int yaffs_do_sync_fs(struct super_block *sb,
++				int request_checkpoint)
++{
++
++	yaffs_dev_t *dev = yaffs_SuperToDevice(sb);
++	unsigned int oneshot_checkpoint = (yaffs_auto_checkpoint & 4);
++	unsigned gc_urgent = yaffs_bg_gc_urgency(dev);
++	int do_checkpoint;
++
++	T(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC | YAFFS_TRACE_BACKGROUND,
++		(TSTR("yaffs_do_sync_fs: gc-urgency %d %s %s%s\n"),
++		gc_urgent,
++		sb->s_dirt ? "dirty" : "clean",
++		request_checkpoint ? "checkpoint requested" : "no checkpoint",
++		oneshot_checkpoint ? " one-shot" : "" ));
++
++	yaffs_gross_lock(dev);
++	do_checkpoint = ((request_checkpoint && !gc_urgent) ||
++			oneshot_checkpoint) &&
++			!dev->is_checkpointed;
++
++	if (sb->s_dirt || do_checkpoint) {
++		yaffs_flush_super(sb, !dev->is_checkpointed && do_checkpoint);
++		sb->s_dirt = 0;
++		if(oneshot_checkpoint)
++			yaffs_auto_checkpoint &= ~4;
++	}
++	yaffs_gross_unlock(dev);
++
++	return 0;
++}
++
++/*
++ * yaffs background thread functions .
++ * yaffs_bg_thread_fn() the thread function
++ * yaffs_bg_start() launches the background thread.
++ * yaffs_bg_stop() cleans up the background thread.
++ *
++ * NB: 
++ * The thread should only run after the yaffs is initialised
++ * The thread should be stopped before yaffs is unmounted.
++ * The thread should not do any writing while the fs is in read only.
++ */
++
++#ifdef YAFFS_COMPILE_BACKGROUND
++
++void yaffs_background_waker(unsigned long data)
++{
++	wake_up_process((struct task_struct *)data);
++}
++
++static int yaffs_bg_thread_fn(void *data)
++{
++	yaffs_dev_t *dev = (yaffs_dev_t *)data;
++	struct yaffs_LinuxContext *context = yaffs_dev_to_lc(dev);
++	unsigned long now = jiffies;
++	unsigned long next_dir_update = now;
++	unsigned long next_gc = now;
++	unsigned long expires;
++	unsigned int urgency;
++
++	int gcResult;
++	struct timer_list timer;
++
++	T(YAFFS_TRACE_BACKGROUND,
++		(TSTR("yaffs_background starting for dev %p\n"),
++		(void *)dev));
++
++#ifdef YAFFS_COMPILE_FREEZER
++	set_freezable();
++#endif
++	while(context->bgRunning){
++		T(YAFFS_TRACE_BACKGROUND,
++			(TSTR("yaffs_background\n")));
++
++		if(kthread_should_stop())
++			break;
++
++#ifdef YAFFS_COMPILE_FREEZER
++		if(try_to_freeze())
++			continue;
++#endif
++		yaffs_gross_lock(dev);
++
++		now = jiffies;
++
++		if(time_after(now, next_dir_update) && yaffs_bg_enable){
++			yaffs_update_dirty_dirs(dev);
++			next_dir_update = now + HZ;
++		}
++
++		if(time_after(now,next_gc) && yaffs_bg_enable){
++			if(!dev->is_checkpointed){
++				urgency = yaffs_bg_gc_urgency(dev);
++				gcResult = yaffs_bg_gc(dev, urgency);
++				if(urgency > 1)
++					next_gc = now + HZ/20+1;
++				else if(urgency > 0)
++					next_gc = now + HZ/10+1;
++				else
++					next_gc = now + HZ * 2;
++			} else /*
++				* gc not running so set to next_dir_update
++				* to cut down on wake ups
++				*/
++				next_gc = next_dir_update;
++		}
++		yaffs_gross_unlock(dev);
++#if 1
++		expires = next_dir_update;
++		if (time_before(next_gc,expires))
++			expires = next_gc;
++		if(time_before(expires,now))
++			expires = now + HZ;
++
++		Y_INIT_TIMER(&timer);
++		timer.expires = expires+1;
++		timer.data = (unsigned long) current;
++		timer.function = yaffs_background_waker;
++
++                set_current_state(TASK_INTERRUPTIBLE);
++		add_timer(&timer);
++		schedule();
++		del_timer_sync(&timer);
++#else
++		msleep(10);
++#endif
++	}
++
++	return 0;
++}
++
++static int yaffs_bg_start(yaffs_dev_t *dev)
++{
++	int retval = 0;
++	struct yaffs_LinuxContext *context = yaffs_dev_to_lc(dev);
++
++	if(dev->read_only)
++		return -1;
++
++	context->bgRunning = 1;
++
++	context->bgThread = kthread_run(yaffs_bg_thread_fn,
++	                        (void *)dev,"yaffs-bg-%d",context->mount_id);
++
++	if(IS_ERR(context->bgThread)){
++		retval = PTR_ERR(context->bgThread);
++		context->bgThread = NULL;
++		context->bgRunning = 0;
++	}
++	return retval;
++}
++
++static void yaffs_bg_stop(yaffs_dev_t *dev)
++{
++	struct yaffs_LinuxContext *ctxt = yaffs_dev_to_lc(dev);
++
++	ctxt->bgRunning = 0;
++
++	if( ctxt->bgThread){
++		kthread_stop(ctxt->bgThread);
++		ctxt->bgThread = NULL;
++	}
++}
++#else
++static int yaffs_bg_thread_fn(void *data)
++{
++	return 0;
++}
++
++static int yaffs_bg_start(yaffs_dev_t *dev)
++{
++	return 0;
++}
++
++static void yaffs_bg_stop(yaffs_dev_t *dev)
++{
++}
++#endif
++
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
++static void yaffs_write_super(struct super_block *sb)
++#else
++static int yaffs_write_super(struct super_block *sb)
++#endif
++{
++	unsigned request_checkpoint = (yaffs_auto_checkpoint >= 2);
++
++	T(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC | YAFFS_TRACE_BACKGROUND,
++		(TSTR("yaffs_write_super%s\n"),
++		request_checkpoint ? " checkpt" : ""));
++
++	yaffs_do_sync_fs(sb, request_checkpoint);
++
++#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 18))
++	return 0;
++#endif
++}
++
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
++static int yaffs_sync_fs(struct super_block *sb, int wait)
++#else
++static int yaffs_sync_fs(struct super_block *sb)
++#endif
++{
++	unsigned request_checkpoint = (yaffs_auto_checkpoint >= 1);
++
++	T(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC,
++		(TSTR("yaffs_sync_fs%s\n"),
++		request_checkpoint ? " checkpt" : ""));
++
++	yaffs_do_sync_fs(sb, request_checkpoint);
++
++	return 0;
++}
++
++#ifdef YAFFS_USE_OWN_IGET
++
++static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino)
++{
++	struct inode *inode;
++	yaffs_obj_t *obj;
++	yaffs_dev_t *dev = yaffs_SuperToDevice(sb);
++
++	T(YAFFS_TRACE_OS,
++		(TSTR("yaffs_iget for %lu\n"), ino));
++
++	inode = iget_locked(sb, ino);
++	if (!inode)
++		return ERR_PTR(-ENOMEM);
++	if (!(inode->i_state & I_NEW))
++		return inode;
++
++	/* NB This is called as a side effect of other functions, but
++	 * we had to release the lock to prevent deadlocks, so
++	 * need to lock again.
++	 */
++
++	yaffs_gross_lock(dev);
++
++	obj = yaffs_find_by_number(dev, inode->i_ino);
++
++	yaffs_fill_inode_from_obj(inode, obj);
++
++	yaffs_gross_unlock(dev);
++
++	unlock_new_inode(inode);
++	return inode;
++}
++
++#else
++
++static void yaffs_read_inode(struct inode *inode)
++{
++	/* NB This is called as a side effect of other functions, but
++	 * we had to release the lock to prevent deadlocks, so
++	 * need to lock again.
++	 */
++
++	yaffs_obj_t *obj;
++	yaffs_dev_t *dev = yaffs_SuperToDevice(inode->i_sb);
++
++	T(YAFFS_TRACE_OS,
++		(TSTR("yaffs_read_inode for %d\n"), (int)inode->i_ino));
++
++	if(current != yaffs_dev_to_lc(dev)->readdirProcess)
++		yaffs_gross_lock(dev);
++
++	obj = yaffs_find_by_number(dev, inode->i_ino);
++
++	yaffs_fill_inode_from_obj(inode, obj);
++
++	if(current != yaffs_dev_to_lc(dev)->readdirProcess)
++		yaffs_gross_unlock(dev);
++}
++
++#endif
++
++static YLIST_HEAD(yaffs_context_list);
++struct semaphore yaffs_context_lock;
++
++static void yaffs_put_super(struct super_block *sb)
++{
++	yaffs_dev_t *dev = yaffs_SuperToDevice(sb);
++
++	T(YAFFS_TRACE_OS, (TSTR("yaffs_put_super\n")));
++
++	T(YAFFS_TRACE_OS | YAFFS_TRACE_BACKGROUND,
++		(TSTR("Shutting down yaffs background thread\n")));
++	yaffs_bg_stop(dev);
++	T(YAFFS_TRACE_OS | YAFFS_TRACE_BACKGROUND,
++		(TSTR("yaffs background thread shut down\n")));
++
++	yaffs_gross_lock(dev);
++
++	yaffs_flush_super(sb,1);
++
++	if (yaffs_dev_to_lc(dev)->putSuperFunc)
++		yaffs_dev_to_lc(dev)->putSuperFunc(sb);
++
++
++	yaffs_deinitialise(dev);
++
++	yaffs_gross_unlock(dev);
++
++	down(&yaffs_context_lock);
++	ylist_del_init(&(yaffs_dev_to_lc(dev)->contextList));
++	up(&yaffs_context_lock);
++
++	if (yaffs_dev_to_lc(dev)->spareBuffer) {
++		YFREE(yaffs_dev_to_lc(dev)->spareBuffer);
++		yaffs_dev_to_lc(dev)->spareBuffer = NULL;
++	}
++
++	kfree(dev);
++}
++
++
++static void yaffs_MTDPutSuper(struct super_block *sb)
++{
++	struct mtd_info *mtd = yaffs_dev_to_mtd(yaffs_SuperToDevice(sb));
++
++	if (mtd->sync)
++		mtd->sync(mtd);
++
++	put_mtd_device(mtd);
++}
++
++
++static void yaffs_touch_super(yaffs_dev_t *dev)
++{
++	struct super_block *sb = yaffs_dev_to_lc(dev)->superBlock;
++
++	T(YAFFS_TRACE_OS, (TSTR("yaffs_touch_super() sb = %p\n"), sb));
++	if (sb)
++		sb->s_dirt = 1;
++}
++
++typedef struct {
++	int inband_tags;
++	int skip_checkpoint_read;
++	int skip_checkpoint_write;
++	int no_cache;
++	int tags_ecc_on;
++	int tags_ecc_overridden;
++	int lazy_loading_enabled;
++	int lazy_loading_overridden;
++	int empty_lost_and_found;
++	int empty_lost_and_found_overridden;
++} yaffs_options;
++
++#define MAX_OPT_LEN 30
++static int yaffs_parse_options(yaffs_options *options, const char *options_str)
++{
++	char cur_opt[MAX_OPT_LEN + 1];
++	int p;
++	int error = 0;
++
++	/* Parse through the options which is a comma seperated list */
++
++	while (options_str && *options_str && !error) {
++		memset(cur_opt, 0, MAX_OPT_LEN + 1);
++		p = 0;
++
++		while(*options_str == ',')
++			options_str++;
++
++		while (*options_str && *options_str != ',') {
++			if (p < MAX_OPT_LEN) {
++				cur_opt[p] = *options_str;
++				p++;
++			}
++			options_str++;
++		}
++
++		if (!strcmp(cur_opt, "inband-tags"))
++			options->inband_tags = 1;
++		else if (!strcmp(cur_opt, "tags-ecc-off")){
++			options->tags_ecc_on = 0;
++			options->tags_ecc_overridden=1;
++		} else if (!strcmp(cur_opt, "tags-ecc-on")){
++			options->tags_ecc_on = 1;
++			options->tags_ecc_overridden = 1;
++		} else if (!strcmp(cur_opt, "lazy-loading-off")){
++			options->lazy_loading_enabled = 0;
++			options->lazy_loading_overridden=1;
++		} else if (!strcmp(cur_opt, "lazy-loading-on")){
++			options->lazy_loading_enabled = 1;
++			options->lazy_loading_overridden = 1;
++		} else if (!strcmp(cur_opt, "empty-lost-and-found-off")){
++			options->empty_lost_and_found = 0;
++			options->empty_lost_and_found_overridden=1;
++		} else if (!strcmp(cur_opt, "empty-lost-and-found-on")){
++			options->empty_lost_and_found = 1;
++			options->empty_lost_and_found_overridden=1;
++		} else if (!strcmp(cur_opt, "no-cache"))
++			options->no_cache = 1;
++		else if (!strcmp(cur_opt, "no-checkpoint-read"))
++			options->skip_checkpoint_read = 1;
++		else if (!strcmp(cur_opt, "no-checkpoint-write"))
++			options->skip_checkpoint_write = 1;
++		else if (!strcmp(cur_opt, "no-checkpoint")) {
++			options->skip_checkpoint_read = 1;
++			options->skip_checkpoint_write = 1;
++		} else {
++			printk(KERN_INFO "yaffs: Bad mount option \"%s\"\n",
++					cur_opt);
++			error = 1;
++		}
++	}
++
++	return error;
++}
++
++static struct super_block *yaffs_internal_read_super(int yaffs_version,
++						struct super_block *sb,
++						void *data, int silent)
++{
++	int nBlocks;
++	struct inode *inode = NULL;
++	struct dentry *root;
++	yaffs_dev_t *dev = 0;
++	char devname_buf[BDEVNAME_SIZE + 1];
++	struct mtd_info *mtd;
++	int err;
++	char *data_str = (char *)data;
++	struct yaffs_LinuxContext *context = NULL;
++	yaffs_param_t *param;
++
++	int read_only = 0;
++
++	yaffs_options options;
++
++	unsigned mount_id;
++	int found;
++	struct yaffs_LinuxContext *context_iterator;
++	struct ylist_head *l;
++
++	sb->s_magic = YAFFS_MAGIC;
++	sb->s_op = &yaffs_super_ops;
++	sb->s_flags |= MS_NOATIME;
++
++	read_only =((sb->s_flags & MS_RDONLY) != 0);
++
++
++#ifdef YAFFS_COMPILE_EXPORTFS
++	sb->s_export_op = &yaffs_export_ops;
++#endif
++
++	if (!sb)
++		printk(KERN_INFO "yaffs: sb is NULL\n");
++	else if (!sb->s_dev)
++		printk(KERN_INFO "yaffs: sb->s_dev is NULL\n");
++	else if (!yaffs_devname(sb, devname_buf))
++		printk(KERN_INFO "yaffs: devname is NULL\n");
++	else
++		printk(KERN_INFO "yaffs: dev is %d name is \"%s\" %s\n",
++		       sb->s_dev,
++		       yaffs_devname(sb, devname_buf),
++		       read_only ? "ro" : "rw");
++
++	if (!data_str)
++		data_str = "";
++
++	printk(KERN_INFO "yaffs: passed flags \"%s\"\n", data_str);
++
++	memset(&options, 0, sizeof(options));
++
++	if (yaffs_parse_options(&options, data_str)) {
++		/* Option parsing failed */
++		return NULL;
++	}
++
++
++	sb->s_blocksize = PAGE_CACHE_SIZE;
++	sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
++
++	T(YAFFS_TRACE_OS,
++		(TSTR("yaffs_read_super: Using yaffs%d\n"), yaffs_version));
++	T(YAFFS_TRACE_OS,
++		(TSTR("yaffs_read_super: block size %d\n"),
++		(int)(sb->s_blocksize)));
++
++	T(YAFFS_TRACE_ALWAYS,
++		(TSTR("yaffs: Attempting MTD mount of %u.%u,\"%s\"\n"),
++	       MAJOR(sb->s_dev), MINOR(sb->s_dev),
++	       yaffs_devname(sb, devname_buf)));
++
++	/* Check it's an mtd device..... */
++	if (MAJOR(sb->s_dev) != MTD_BLOCK_MAJOR)
++		return NULL;	/* This isn't an mtd device */
++
++	/* Get the device */
++	mtd = get_mtd_device(NULL, MINOR(sb->s_dev));
++	if (!mtd) {
++		T(YAFFS_TRACE_ALWAYS,
++			(TSTR("yaffs: MTD device #%u doesn't appear to exist\n"),
++			MINOR(sb->s_dev)));
++		return NULL;
++	}
++	/* Check it's NAND */
++	if (mtd->type != MTD_NANDFLASH) {
++		T(YAFFS_TRACE_ALWAYS,
++			(TSTR("yaffs: MTD device is not NAND it's type %d\n"),
++			mtd->type));
++		return NULL;
++	}
++
++	T(YAFFS_TRACE_OS, (TSTR(" erase %p\n"), mtd->erase));
++	T(YAFFS_TRACE_OS, (TSTR(" read %p\n"), mtd->read));
++	T(YAFFS_TRACE_OS, (TSTR(" write %p\n"), mtd->write));
++	T(YAFFS_TRACE_OS, (TSTR(" readoob %p\n"), mtd->read_oob));
++	T(YAFFS_TRACE_OS, (TSTR(" writeoob %p\n"), mtd->write_oob));
++	T(YAFFS_TRACE_OS, (TSTR(" block_isbad %p\n"), mtd->block_isbad));
++	T(YAFFS_TRACE_OS, (TSTR(" block_markbad %p\n"), mtd->block_markbad));
++	T(YAFFS_TRACE_OS, (TSTR(" %s %d\n"), WRITE_SIZE_STR, WRITE_SIZE(mtd)));
++	T(YAFFS_TRACE_OS, (TSTR(" oobsize %d\n"), mtd->oobsize));
++	T(YAFFS_TRACE_OS, (TSTR(" erasesize %d\n"), mtd->erasesize));
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
++	T(YAFFS_TRACE_OS, (TSTR(" size %u\n"), mtd->size));
++#else
++	T(YAFFS_TRACE_OS, (TSTR(" size %lld\n"), mtd->size));
++#endif
++
++#ifdef CONFIG_YAFFS_AUTO_YAFFS2
++
++	if (yaffs_version == 1 && WRITE_SIZE(mtd) >= 2048) {
++		T(YAFFS_TRACE_ALWAYS,
++			(TSTR("yaffs: auto selecting yaffs2\n")));
++		yaffs_version = 2;
++	}
++
++	/* Added NCB 26/5/2006 for completeness */
++	if (yaffs_version == 2 && !options.inband_tags && WRITE_SIZE(mtd) == 512) {
++		T(YAFFS_TRACE_ALWAYS,
++			(TSTR("yaffs: auto selecting yaffs1\n")));
++		yaffs_version = 1;
++	}
++
++#endif
++
++	if (yaffs_version == 2) {
++		/* Check for version 2 style functions */
++		if (!mtd->erase ||
++		    !mtd->block_isbad ||
++		    !mtd->block_markbad ||
++		    !mtd->read ||
++		    !mtd->write ||
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
++		    !mtd->read_oob || !mtd->write_oob) {
++#else
++		    !mtd->write_ecc ||
++		    !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) {
++#endif
++			T(YAFFS_TRACE_ALWAYS,
++			  (TSTR("yaffs: MTD device does not support required "
++			   "functions\n")));
++			return NULL;
++		}
++
++		if ((WRITE_SIZE(mtd) < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
++		    mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE) &&
++		    !options.inband_tags) {
++			T(YAFFS_TRACE_ALWAYS,
++			  (TSTR("yaffs: MTD device does not have the "
++			   "right page sizes\n")));
++			return NULL;
++		}
++	} else {
++		/* Check for V1 style functions */
++		if (!mtd->erase ||
++		    !mtd->read ||
++		    !mtd->write ||
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
++		    !mtd->read_oob || !mtd->write_oob) {
++#else
++		    !mtd->write_ecc ||
++		    !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) {
++#endif
++			T(YAFFS_TRACE_ALWAYS,
++			  (TSTR("yaffs: MTD device does not support required "
++			   "functions\n")));
++			return NULL;
++		}
++
++		if (WRITE_SIZE(mtd) < YAFFS_BYTES_PER_CHUNK ||
++		    mtd->oobsize != YAFFS_BYTES_PER_SPARE) {
++			T(YAFFS_TRACE_ALWAYS,
++			  (TSTR("yaffs: MTD device does not support have the "
++			   "right page sizes\n")));
++			return NULL;
++		}
++	}
++
++	/* OK, so if we got here, we have an MTD that's NAND and looks
++	 * like it has the right capabilities
++	 * Set the yaffs_dev_t up for mtd
++	 */
++
++	if (!read_only && !(mtd->flags & MTD_WRITEABLE)){
++		read_only = 1;
++		printk(KERN_INFO "yaffs: mtd is read only, setting superblock read only");
++		sb->s_flags |= MS_RDONLY;
++	}
++
++	dev = kmalloc(sizeof(yaffs_dev_t), GFP_KERNEL);
++	context = kmalloc(sizeof(struct yaffs_LinuxContext),GFP_KERNEL);
++	
++	if(!dev || !context ){
++		if(dev)
++			kfree(dev);
++		if(context)
++			kfree(context);
++		dev = NULL;
++		context = NULL;
++	}
++
++	if (!dev) {
++		/* Deep shit could not allocate device structure */
++		T(YAFFS_TRACE_ALWAYS,
++		  (TSTR("yaffs_read_super: Failed trying to allocate "
++		   "yaffs_dev_t. \n")));
++		return NULL;
++	}
++	memset(dev, 0, sizeof(yaffs_dev_t));
++	param = &(dev->param);
++
++	memset(context,0,sizeof(struct yaffs_LinuxContext));
++	dev->os_context = context;
++	YINIT_LIST_HEAD(&(context->contextList));
++	context->dev = dev;
++	context->superBlock = sb;
++
++	dev->read_only = read_only;
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++	sb->s_fs_info = dev;
++#else
++	sb->u.generic_sbp = dev;
++#endif
++	
++	dev->driver_context = mtd;
++	param->name = mtd->name;
++
++	/* Set up the memory size parameters.... */
++
++	nBlocks = YCALCBLOCKS(mtd->size, (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK));
++
++	param->start_block = 0;
++	param->end_block = nBlocks - 1;
++	param->chunks_per_block = YAFFS_CHUNKS_PER_BLOCK;
++	param->total_bytes_per_chunk = YAFFS_BYTES_PER_CHUNK;
++	param->n_reserved_blocks = 5;
++	param->n_caches = (options.no_cache) ? 0 : 10;
++	param->inband_tags = options.inband_tags;
++
++#ifdef CONFIG_YAFFS_DISABLE_LAZY_LOAD
++	param->disable_lazy_load = 1;
++#endif
++#ifdef CONFIG_YAFFS_XATTR
++	param->enable_xattr = 1;
++#endif
++	if(options.lazy_loading_overridden)
++		param->disable_lazy_load = !options.lazy_loading_enabled;
++
++#ifdef CONFIG_YAFFS_DISABLE_TAGS_ECC
++	param->no_tags_ecc = 1;
++#endif
++
++#ifdef CONFIG_YAFFS_DISABLE_BACKGROUND
++#else
++	param->defered_dir_update = 1;
++#endif
++
++	if(options.tags_ecc_overridden)
++		param->no_tags_ecc = !options.tags_ecc_on;
++
++#ifdef CONFIG_YAFFS_EMPTY_LOST_AND_FOUND
++	param->empty_lost_n_found = 1;
++#endif
++
++#ifdef CONFIG_YAFFS_DISABLE_BLOCK_REFRESHING
++	param->refresh_period = 0;
++#else
++	param->refresh_period = 500;
++#endif
++
++#ifdef CONFIG_YAFFS__ALWAYS_CHECK_CHUNK_ERASED
++	param->always_check_erased = 1;
++#endif
++
++	if(options.empty_lost_and_found_overridden)
++		param->empty_lost_n_found = options.empty_lost_and_found;
++
++	/* ... and the functions. */
++	if (yaffs_version == 2) {
++		param->write_chunk_tags_fn =
++		    nandmtd2_WriteChunkWithTagsToNAND;
++		param->read_chunk_tags_fn =
++		    nandmtd2_ReadChunkWithTagsFromNAND;
++		param->bad_block_fn = nandmtd2_MarkNANDBlockBad;
++		param->query_block_fn = nandmtd2_QueryNANDBlock;
++		yaffs_dev_to_lc(dev)->spareBuffer = YMALLOC(mtd->oobsize);
++		param->is_yaffs2 = 1;
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
++		param->total_bytes_per_chunk = mtd->writesize;
++		param->chunks_per_block = mtd->erasesize / mtd->writesize;
++#else
++		param->total_bytes_per_chunk = mtd->oobblock;
++		param->chunks_per_block = mtd->erasesize / mtd->oobblock;
++#endif
++		nBlocks = YCALCBLOCKS(mtd->size, mtd->erasesize);
++
++		param->start_block = 0;
++		param->end_block = nBlocks - 1;
++	} else {
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
++		/* use the MTD interface in yaffs_mtdif1.c */
++		param->write_chunk_tags_fn =
++			nandmtd1_WriteChunkWithTagsToNAND;
++		param->read_chunk_tags_fn =
++			nandmtd1_ReadChunkWithTagsFromNAND;
++		param->bad_block_fn = nandmtd1_MarkNANDBlockBad;
++		param->query_block_fn = nandmtd1_QueryNANDBlock;
++#else
++		param->write_chunk_fn = nandmtd_WriteChunkToNAND;
++		param->read_chunk_fn = nandmtd_ReadChunkFromNAND;
++#endif
++		param->is_yaffs2 = 0;
++	}
++	/* ... and common functions */
++	param->erase_fn = nandmtd_EraseBlockInNAND;
++	param->initialise_flash_fn = nandmtd_InitialiseNAND;
++
++	yaffs_dev_to_lc(dev)->putSuperFunc = yaffs_MTDPutSuper;
++
++	param->sb_dirty_fn = yaffs_touch_super;
++	param->gc_control = yaffs_gc_control_callback;
++
++	yaffs_dev_to_lc(dev)->superBlock= sb;
++	
++
++#ifndef CONFIG_YAFFS_DOES_ECC
++	param->use_nand_ecc = 1;
++#endif
++
++#ifdef CONFIG_YAFFS_DISABLE_WIDE_TNODES
++	param->wide_tnodes_disabled = 1;
++#endif
++
++	param->skip_checkpt_rd = options.skip_checkpoint_read;
++	param->skip_checkpt_wr = options.skip_checkpoint_write;
++
++	down(&yaffs_context_lock);
++	/* Get a mount id */
++	found = 0;
++	for(mount_id=0; ! found; mount_id++){
++		found = 1;
++		ylist_for_each(l,&yaffs_context_list){
++			context_iterator = ylist_entry(l,struct yaffs_LinuxContext,contextList);
++			if(context_iterator->mount_id == mount_id)
++				found = 0;
++		}
++	}
++	context->mount_id = mount_id;
++
++	ylist_add_tail(&(yaffs_dev_to_lc(dev)->contextList), &yaffs_context_list);
++	up(&yaffs_context_lock);
++
++        /* Directory search handling...*/
++        YINIT_LIST_HEAD(&(yaffs_dev_to_lc(dev)->searchContexts));
++        param->remove_obj_fn = yaffs_remove_obj_callback;
++
++	init_MUTEX(&(yaffs_dev_to_lc(dev)->grossLock));
++
++	yaffs_gross_lock(dev);
++
++	err = yaffs_guts_initialise(dev);
++
++	T(YAFFS_TRACE_OS,
++	  (TSTR("yaffs_read_super: guts initialised %s\n"),
++	   (err == YAFFS_OK) ? "OK" : "FAILED"));
++	   
++	if(err == YAFFS_OK)
++		yaffs_bg_start(dev);
++		
++	if(!context->bgThread)
++		param->defered_dir_update = 0;
++
++
++	/* Release lock before yaffs_get_inode() */
++	yaffs_gross_unlock(dev);
++
++	/* Create root inode */
++	if (err == YAFFS_OK)
++		inode = yaffs_get_inode(sb, S_IFDIR | 0755, 0,
++					yaffs_root(dev));
++
++	if (!inode)
++		return NULL;
++
++	inode->i_op = &yaffs_dir_inode_operations;
++	inode->i_fop = &yaffs_dir_operations;
++
++	T(YAFFS_TRACE_OS, (TSTR("yaffs_read_super: got root inode\n")));
++
++	root = d_alloc_root(inode);
++
++	T(YAFFS_TRACE_OS, (TSTR("yaffs_read_super: d_alloc_root done\n")));
++
++	if (!root) {
++		iput(inode);
++		return NULL;
++	}
++	sb->s_root = root;
++	sb->s_dirt = !dev->is_checkpointed;
++	T(YAFFS_TRACE_ALWAYS,
++		(TSTR("yaffs_read_super: is_checkpointed %d\n"),
++		dev->is_checkpointed));
++
++	T(YAFFS_TRACE_OS, (TSTR("yaffs_read_super: done\n")));
++	return sb;
++}
++
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++static int yaffs_internal_read_super_mtd(struct super_block *sb, void *data,
++					 int silent)
++{
++	return yaffs_internal_read_super(1, sb, data, silent) ? 0 : -EINVAL;
++}
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
++static int yaffs_read_super(struct file_system_type *fs,
++			    int flags, const char *dev_name,
++			    void *data, struct vfsmount *mnt)
++{
++
++	return get_sb_bdev(fs, flags, dev_name, data,
++			   yaffs_internal_read_super_mtd, mnt);
++}
++#else
++static struct super_block *yaffs_read_super(struct file_system_type *fs,
++					    int flags, const char *dev_name,
++					    void *data)
++{
++
++	return get_sb_bdev(fs, flags, dev_name, data,
++			   yaffs_internal_read_super_mtd);
++}
++#endif
++
++static struct file_system_type yaffs_fs_type = {
++	.owner = THIS_MODULE,
++	.name = "yaffs",
++	.get_sb = yaffs_read_super,
++	.kill_sb = kill_block_super,
++	.fs_flags = FS_REQUIRES_DEV,
++};
++#else
++static struct super_block *yaffs_read_super(struct super_block *sb, void *data,
++					    int silent)
++{
++	return yaffs_internal_read_super(1, sb, data, silent);
++}
++
++static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super,
++		      FS_REQUIRES_DEV);
++#endif
++
++
++#ifdef CONFIG_YAFFS_YAFFS2
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++static int yaffs2_internal_read_super_mtd(struct super_block *sb, void *data,
++					  int silent)
++{
++	return yaffs_internal_read_super(2, sb, data, silent) ? 0 : -EINVAL;
++}
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
++static int yaffs2_read_super(struct file_system_type *fs,
++			int flags, const char *dev_name, void *data,
++			struct vfsmount *mnt)
++{
++	return get_sb_bdev(fs, flags, dev_name, data,
++			yaffs2_internal_read_super_mtd, mnt);
++}
++#else
++static struct super_block *yaffs2_read_super(struct file_system_type *fs,
++					     int flags, const char *dev_name,
++					     void *data)
++{
++
++	return get_sb_bdev(fs, flags, dev_name, data,
++			   yaffs2_internal_read_super_mtd);
++}
++#endif
++
++static struct file_system_type yaffs2_fs_type = {
++	.owner = THIS_MODULE,
++	.name = "yaffs2",
++	.get_sb = yaffs2_read_super,
++	.kill_sb = kill_block_super,
++	.fs_flags = FS_REQUIRES_DEV,
++};
++#else
++static struct super_block *yaffs2_read_super(struct super_block *sb,
++					     void *data, int silent)
++{
++	return yaffs_internal_read_super(2, sb, data, silent);
++}
++
++static DECLARE_FSTYPE(yaffs2_fs_type, "yaffs2", yaffs2_read_super,
++		      FS_REQUIRES_DEV);
++#endif
++
++#endif				/* CONFIG_YAFFS_YAFFS2 */
++
++static struct proc_dir_entry *my_proc_entry;
++static struct proc_dir_entry *debug_proc_entry;
++
++static char *yaffs_dump_dev_part0(char *buf, yaffs_dev_t * dev)
++{
++	buf += sprintf(buf, "start_block.......... %d\n", dev->param.start_block);
++	buf += sprintf(buf, "end_block............ %d\n", dev->param.end_block);
++	buf += sprintf(buf, "total_bytes_per_chunk %d\n", dev->param.total_bytes_per_chunk);
++	buf += sprintf(buf, "use_nand_ecc......... %d\n", dev->param.use_nand_ecc);
++	buf += sprintf(buf, "no_tags_ecc.......... %d\n", dev->param.no_tags_ecc);
++	buf += sprintf(buf, "is_yaffs2............ %d\n", dev->param.is_yaffs2);
++	buf += sprintf(buf, "inband_tags.......... %d\n", dev->param.inband_tags);
++	buf += sprintf(buf, "empty_lost_n_found... %d\n", dev->param.empty_lost_n_found);
++	buf += sprintf(buf, "disable_lazy_load.... %d\n", dev->param.disable_lazy_load);
++	buf += sprintf(buf, "refresh_period....... %d\n", dev->param.refresh_period);
++	buf += sprintf(buf, "n_caches............. %d\n", dev->param.n_caches);
++	buf += sprintf(buf, "n_reserved_blocks.... %d\n", dev->param.n_reserved_blocks);
++	buf += sprintf(buf, "always_check_erased.. %d\n", dev->param.always_check_erased);
++
++	buf += sprintf(buf, "\n");
++
++	return buf;
++}
++
++
++static char *yaffs_dump_dev_part1(char *buf, yaffs_dev_t * dev)
++{
++	buf += sprintf(buf, "data_bytes_per_chunk. %d\n", dev->data_bytes_per_chunk);
++	buf += sprintf(buf, "chunk_grp_bits....... %d\n", dev->chunk_grp_bits);
++	buf += sprintf(buf, "chunk_grp_size....... %d\n", dev->chunk_grp_size);
++	buf += sprintf(buf, "n_erased_blocks...... %d\n", dev->n_erased_blocks);
++	buf += sprintf(buf, "blocks_in_checkpt.... %d\n", dev->blocks_in_checkpt);
++	buf += sprintf(buf, "\n");
++	buf += sprintf(buf, "n_tnodes............. %d\n", dev->n_tnodes);
++	buf += sprintf(buf, "n_obj................ %d\n", dev->n_obj);
++	buf += sprintf(buf, "n_free_chunks........ %d\n", dev->n_free_chunks);
++	buf += sprintf(buf, "\n");
++	buf += sprintf(buf, "n_page_writes........ %u\n", dev->n_page_writes);
++	buf += sprintf(buf, "n_page_reads......... %u\n", dev->n_page_reads);
++	buf += sprintf(buf, "n_erasures........... %u\n", dev->n_erasures);
++	buf += sprintf(buf, "n_gc_copies.......... %u\n", dev->n_gc_copies);
++	buf += sprintf(buf, "all_gcs.............. %u\n", dev->all_gcs);
++	buf += sprintf(buf, "passive_gc_count..... %u\n", dev->passive_gc_count);
++	buf += sprintf(buf, "oldest_dirty_gc_count %u\n", dev->oldest_dirty_gc_count);
++	buf += sprintf(buf, "n_gc_blocks.......... %u\n", dev->n_gc_blocks);
++	buf += sprintf(buf, "bg_gcs............... %u\n", dev->bg_gcs);
++	buf += sprintf(buf, "n_retired_writes..... %u\n", dev->n_retired_writes);
++	buf += sprintf(buf, "nRetireBlocks........ %u\n", dev->n_retired_blocks);
++	buf += sprintf(buf, "n_ecc_fixed.......... %u\n", dev->n_ecc_fixed);
++	buf += sprintf(buf, "n_ecc_unfixed........ %u\n", dev->n_ecc_unfixed);
++	buf += sprintf(buf, "n_tags_ecc_fixed..... %u\n", dev->n_tags_ecc_fixed);
++	buf += sprintf(buf, "n_tags_ecc_unfixed... %u\n", dev->n_tags_ecc_unfixed);
++	buf += sprintf(buf, "cache_hits........... %u\n", dev->cache_hits);
++	buf += sprintf(buf, "n_deleted_files...... %u\n", dev->n_deleted_files);
++	buf += sprintf(buf, "n_unlinked_files..... %u\n", dev->n_unlinked_files);
++	buf += sprintf(buf, "refresh_count........ %u\n", dev->refresh_count);
++	buf += sprintf(buf, "n_bg_deletions....... %u\n", dev->n_bg_deletions);
++
++	return buf;
++}
++
++static int yaffs_proc_read(char *page,
++			   char **start,
++			   off_t offset, int count, int *eof, void *data)
++{
++	struct ylist_head *item;
++	char *buf = page;
++	int step = offset;
++	int n = 0;
++
++	/* Get proc_file_read() to step 'offset' by one on each sucessive call.
++	 * We use 'offset' (*ppos) to indicate where we are in dev_list.
++	 * This also assumes the user has posted a read buffer large
++	 * enough to hold the complete output; but that's life in /proc.
++	 */
++
++	*(int *)start = 1;
++
++	/* Print header first */
++	if (step == 0)
++		buf += sprintf(buf, "Multi-version YAFFS built:" __DATE__ " " __TIME__"\n");
++	else if (step == 1)
++		buf += sprintf(buf,"\n");
++	else {
++		step-=2;
++		
++		down(&yaffs_context_lock);
++
++		/* Locate and print the Nth entry.  Order N-squared but N is small. */
++		ylist_for_each(item, &yaffs_context_list) {
++			struct yaffs_LinuxContext *dc = ylist_entry(item, struct yaffs_LinuxContext, contextList);
++			yaffs_dev_t *dev = dc->dev;
++
++			if (n < (step & ~1)) {
++				n+=2;
++				continue;
++			}
++			if((step & 1)==0){
++				buf += sprintf(buf, "\nDevice %d \"%s\"\n", n, dev->param.name);
++				buf = yaffs_dump_dev_part0(buf, dev);
++			} else
++				buf = yaffs_dump_dev_part1(buf, dev);
++			
++			break;
++		}
++		up(&yaffs_context_lock);
++	}
++
++	return buf - page < count ? buf - page : count;
++}
++
++static int yaffs_stats_proc_read(char *page,
++				char **start,
++				off_t offset, int count, int *eof, void *data)
++{
++	struct ylist_head *item;
++	char *buf = page;
++	int n = 0;
++
++	down(&yaffs_context_lock);
++
++	/* Locate and print the Nth entry.  Order N-squared but N is small. */
++	ylist_for_each(item, &yaffs_context_list) {
++		struct yaffs_LinuxContext *dc = ylist_entry(item, struct yaffs_LinuxContext, contextList);
++		yaffs_dev_t *dev = dc->dev;
++
++		int erasedChunks;
++
++		erasedChunks = dev->n_erased_blocks * dev->param.chunks_per_block;
++		
++		buf += sprintf(buf,"%d, %d, %d, %u, %u, %u, %u\n",
++				n, dev->n_free_chunks, erasedChunks,
++				dev->bg_gcs, dev->oldest_dirty_gc_count,
++				dev->n_obj, dev->n_tnodes);
++	}
++	up(&yaffs_context_lock);
++
++
++	return buf - page < count ? buf - page : count;
++}
++
++/**
++ * Set the verbosity of the warnings and error messages.
++ *
++ * Note that the names can only be a..z or _ with the current code.
++ */
++
++static struct {
++	char *mask_name;
++	unsigned mask_bitfield;
++} mask_flags[] = {
++	{"allocate", YAFFS_TRACE_ALLOCATE},
++	{"always", YAFFS_TRACE_ALWAYS},
++	{"background", YAFFS_TRACE_BACKGROUND},
++	{"bad_blocks", YAFFS_TRACE_BAD_BLOCKS},
++	{"buffers", YAFFS_TRACE_BUFFERS},
++	{"bug", YAFFS_TRACE_BUG},
++	{"checkpt", YAFFS_TRACE_CHECKPOINT},
++	{"deletion", YAFFS_TRACE_DELETION},
++	{"erase", YAFFS_TRACE_ERASE},
++	{"error", YAFFS_TRACE_ERROR},
++	{"gc_detail", YAFFS_TRACE_GC_DETAIL},
++	{"gc", YAFFS_TRACE_GC},
++	{"lock", YAFFS_TRACE_LOCK},
++	{"mtd", YAFFS_TRACE_MTD},
++	{"nandaccess", YAFFS_TRACE_NANDACCESS},
++	{"os", YAFFS_TRACE_OS},
++	{"scan_debug", YAFFS_TRACE_SCAN_DEBUG},
++	{"scan", YAFFS_TRACE_SCAN},
++	{"tracing", YAFFS_TRACE_TRACING},
++	{"sync", YAFFS_TRACE_SYNC},
++	{"write", YAFFS_TRACE_WRITE},
++
++	{"verify", YAFFS_TRACE_VERIFY},
++	{"verify_nand", YAFFS_TRACE_VERIFY_NAND},
++	{"verify_full", YAFFS_TRACE_VERIFY_FULL},
++	{"verify_all", YAFFS_TRACE_VERIFY_ALL},
++
++	{"all", 0xffffffff},
++	{"none", 0},
++	{NULL, 0},
++};
++
++#define MAX_MASK_NAME_LENGTH 40
++static int yaffs_proc_write_trace_options(struct file *file, const char *buf,
++					 unsigned long count, void *data)
++{
++	unsigned rg = 0, mask_bitfield;
++	char *end;
++	char *mask_name;
++	const char *x;
++	char substring[MAX_MASK_NAME_LENGTH + 1];
++	int i;
++	int done = 0;
++	int add, len = 0;
++	int pos = 0;
++
++	rg = yaffs_trace_mask;
++
++	while (!done && (pos < count)) {
++		done = 1;
++		while ((pos < count) && isspace(buf[pos]))
++			pos++;
++
++		switch (buf[pos]) {
++		case '+':
++		case '-':
++		case '=':
++			add = buf[pos];
++			pos++;
++			break;
++
++		default:
++			add = ' ';
++			break;
++		}
++		mask_name = NULL;
++
++		mask_bitfield = simple_strtoul(buf + pos, &end, 0);
++
++		if (end > buf + pos) {
++			mask_name = "numeral";
++			len = end - (buf + pos);
++			pos += len;
++			done = 0;
++		} else {
++			for (x = buf + pos, i = 0;
++			    (*x == '_' || (*x >= 'a' && *x <= 'z')) &&
++			    i < MAX_MASK_NAME_LENGTH; x++, i++, pos++)
++				substring[i] = *x;
++			substring[i] = '\0';
++
++			for (i = 0; mask_flags[i].mask_name != NULL; i++) {
++				if (strcmp(substring, mask_flags[i].mask_name) == 0) {
++					mask_name = mask_flags[i].mask_name;
++					mask_bitfield = mask_flags[i].mask_bitfield;
++					done = 0;
++					break;
++				}
++			}
++		}
++
++		if (mask_name != NULL) {
++			done = 0;
++			switch (add) {
++			case '-':
++				rg &= ~mask_bitfield;
++				break;
++			case '+':
++				rg |= mask_bitfield;
++				break;
++			case '=':
++				rg = mask_bitfield;
++				break;
++			default:
++				rg |= mask_bitfield;
++				break;
++			}
++		}
++	}
++
++	yaffs_trace_mask = rg | YAFFS_TRACE_ALWAYS;
++
++	printk(KERN_DEBUG "new trace = 0x%08X\n", yaffs_trace_mask);
++
++	if (rg & YAFFS_TRACE_ALWAYS) {
++		for (i = 0; mask_flags[i].mask_name != NULL; i++) {
++			char flag;
++			flag = ((rg & mask_flags[i].mask_bitfield) ==
++				mask_flags[i].mask_bitfield) ? '+' : '-';
++			printk(KERN_DEBUG "%c%s\n", flag, mask_flags[i].mask_name);
++		}
++	}
++
++	return count;
++}
++
++
++static int yaffs_proc_write(struct file *file, const char *buf,
++					 unsigned long count, void *data)
++{
++        return yaffs_proc_write_trace_options(file, buf, count, data);
++}
++
++/* Stuff to handle installation of file systems */
++struct file_system_to_install {
++	struct file_system_type *fst;
++	int installed;
++};
++
++static struct file_system_to_install fs_to_install[] = {
++	{&yaffs_fs_type, 0},
++	{&yaffs2_fs_type, 0},
++	{NULL, 0}
++};
++
++static int __init init_yaffs_fs(void)
++{
++	int error = 0;
++	struct file_system_to_install *fsinst;
++
++	T(YAFFS_TRACE_ALWAYS,
++	  (TSTR("yaffs built " __DATE__ " " __TIME__ " Installing. \n")));
++
++#ifdef CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED
++	T(YAFFS_TRACE_ALWAYS,
++	  (TSTR(" \n\n\n\nYAFFS-WARNING CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED selected.\n\n\n\n")));
++#endif
++
++
++
++
++	init_MUTEX(&yaffs_context_lock);
++
++	/* Install the proc_fs entries */
++	my_proc_entry = create_proc_entry("yaffs",
++					       S_IRUGO | S_IFREG,
++					       YPROC_ROOT);
++
++	if (my_proc_entry) {
++		my_proc_entry->write_proc = yaffs_proc_write;
++		my_proc_entry->read_proc = yaffs_proc_read;
++		my_proc_entry->data = NULL;
++	} else
++		return -ENOMEM;
++
++	debug_proc_entry = create_proc_entry("yaffs_stats",
++					       S_IRUGO | S_IFREG,
++					       YPROC_ROOT);
++
++	if (debug_proc_entry) {
++		debug_proc_entry->write_proc = NULL;
++		debug_proc_entry->read_proc = yaffs_stats_proc_read;
++		debug_proc_entry->data = NULL;
++	} else
++		return -ENOMEM;
++
++	/* Now add the file system entries */
++
++	fsinst = fs_to_install;
++
++	while (fsinst->fst && !error) {
++		error = register_filesystem(fsinst->fst);
++		if (!error)
++			fsinst->installed = 1;
++		fsinst++;
++	}
++
++	/* Any errors? uninstall  */
++	if (error) {
++		fsinst = fs_to_install;
++
++		while (fsinst->fst) {
++			if (fsinst->installed) {
++				unregister_filesystem(fsinst->fst);
++				fsinst->installed = 0;
++			}
++			fsinst++;
++		}
++	}
++
++	return error;
++}
++
++static void __exit exit_yaffs_fs(void)
++{
++
++	struct file_system_to_install *fsinst;
++
++	T(YAFFS_TRACE_ALWAYS,
++		(TSTR("yaffs built " __DATE__ " " __TIME__ " removing. \n")));
++
++	remove_proc_entry("yaffs", YPROC_ROOT);
++	remove_proc_entry("yaffs_stats", YPROC_ROOT);
++
++	fsinst = fs_to_install;
++
++	while (fsinst->fst) {
++		if (fsinst->installed) {
++			unregister_filesystem(fsinst->fst);
++			fsinst->installed = 0;
++		}
++		fsinst++;
++	}
++}
++
++module_init(init_yaffs_fs)
++module_exit(exit_yaffs_fs)
++
++MODULE_DESCRIPTION("YAFFS2 - a NAND specific flash file system");
++MODULE_AUTHOR("Charles Manning, Aleph One Ltd., 2002-2010");
++MODULE_LICENSE("GPL");
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffs_yaffs1.c linux-2.6.36-rc8.new/fs/yaffs2/yaffs_yaffs1.c
+--- linux-2.6.36-rc8/fs/yaffs2/yaffs_yaffs1.c	1970-01-01 02:00:00.000000000 +0200
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffs_yaffs1.c	2010-10-20 13:28:16.039000295 +0300
+@@ -0,0 +1,465 @@
++/*
++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2010 Aleph One Ltd.
++ *   for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ */
++#include "yaffs_yaffs1.h"
++#include "yportenv.h"
++#include "yaffs_trace.h"
++#include "yaffs_bitmap.h"
++#include "yaffs_getblockinfo.h"
++#include "yaffs_nand.h"
++
++
++int yaffs1_scan(yaffs_dev_t *dev)
++{
++	yaffs_ext_tags tags;
++	int blk;
++	int blockIterator;
++	int startIterator;
++	int endIterator;
++	int result;
++
++	int chunk;
++	int c;
++	int deleted;
++	yaffs_block_state_t state;
++	yaffs_obj_t *hard_list = NULL;
++	yaffs_block_info_t *bi;
++	__u32 seq_number;
++	yaffs_obj_header *oh;
++	yaffs_obj_t *in;
++	yaffs_obj_t *parent;
++
++	int alloc_failed = 0;
++
++	struct yaffs_shadow_fixer_s *shadowFixerList = NULL;
++
++
++	__u8 *chunkData;
++
++
++
++	T(YAFFS_TRACE_SCAN,
++	  (TSTR("yaffs1_scan starts  intstartblk %d intendblk %d..." TENDSTR),
++	   dev->internal_start_block, dev->internal_end_block));
++
++	chunkData = yaffs_get_temp_buffer(dev, __LINE__);
++
++	dev->seq_number = YAFFS_LOWEST_SEQUENCE_NUMBER;
++
++	/* Scan all the blocks to determine their state */
++	bi = dev->block_info;
++	for (blk = dev->internal_start_block; blk <= dev->internal_end_block; blk++) {
++		yaffs_clear_chunk_bits(dev, blk);
++		bi->pages_in_use = 0;
++		bi->soft_del_pages = 0;
++
++		yaffs_query_init_block_state(dev, blk, &state, &seq_number);
++
++		bi->block_state = state;
++		bi->seq_number = seq_number;
++
++		if (bi->seq_number == YAFFS_SEQUENCE_BAD_BLOCK)
++			bi->block_state = state = YAFFS_BLOCK_STATE_DEAD;
++
++		T(YAFFS_TRACE_SCAN_DEBUG,
++		  (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk,
++		   state, seq_number));
++
++		if (state == YAFFS_BLOCK_STATE_DEAD) {
++			T(YAFFS_TRACE_BAD_BLOCKS,
++			  (TSTR("block %d is bad" TENDSTR), blk));
++		} else if (state == YAFFS_BLOCK_STATE_EMPTY) {
++			T(YAFFS_TRACE_SCAN_DEBUG,
++			  (TSTR("Block empty " TENDSTR)));
++			dev->n_erased_blocks++;
++			dev->n_free_chunks += dev->param.chunks_per_block;
++		}
++		bi++;
++	}
++
++	startIterator = dev->internal_start_block;
++	endIterator = dev->internal_end_block;
++
++	/* For each block.... */
++	for (blockIterator = startIterator; !alloc_failed && blockIterator <= endIterator;
++	     blockIterator++) {
++
++		YYIELD();
++
++		YYIELD();
++
++		blk = blockIterator;
++
++		bi = yaffs_get_block_info(dev, blk);
++		state = bi->block_state;
++
++		deleted = 0;
++
++		/* For each chunk in each block that needs scanning....*/
++		for (c = 0; !alloc_failed && c < dev->param.chunks_per_block &&
++		     state == YAFFS_BLOCK_STATE_NEEDS_SCANNING; c++) {
++			/* Read the tags and decide what to do */
++			chunk = blk * dev->param.chunks_per_block + c;
++
++			result = yaffs_rd_chunk_tags_nand(dev, chunk, NULL,
++							&tags);
++
++			/* Let's have a good look at this chunk... */
++
++			if (tags.ecc_result == YAFFS_ECC_RESULT_UNFIXED || tags.is_deleted) {
++				/* YAFFS1 only...
++				 * A deleted chunk
++				 */
++				deleted++;
++				dev->n_free_chunks++;
++				/*T((" %d %d deleted\n",blk,c)); */
++			} else if (!tags.chunk_used) {
++				/* An unassigned chunk in the block
++				 * This means that either the block is empty or
++				 * this is the one being allocated from
++				 */
++
++				if (c == 0) {
++					/* We're looking at the first chunk in the block so the block is unused */
++					state = YAFFS_BLOCK_STATE_EMPTY;
++					dev->n_erased_blocks++;
++				} else {
++					/* this is the block being allocated from */
++					T(YAFFS_TRACE_SCAN,
++					  (TSTR
++					   (" Allocating from %d %d" TENDSTR),
++					   blk, c));
++					state = YAFFS_BLOCK_STATE_ALLOCATING;
++					dev->alloc_block = blk;
++					dev->alloc_page = c;
++					dev->alloc_block_finder = blk;
++					/* Set block finder here to encourage the allocator to go forth from here. */
++
++				}
++
++				dev->n_free_chunks += (dev->param.chunks_per_block - c);
++			} else if (tags.chunk_id > 0) {
++				/* chunk_id > 0 so it is a data chunk... */
++				unsigned int endpos;
++
++				yaffs_set_chunk_bit(dev, blk, c);
++				bi->pages_in_use++;
++
++				in = yaffs_find_or_create_by_number(dev,
++								      tags.
++								      obj_id,
++								      YAFFS_OBJECT_TYPE_FILE);
++				/* PutChunkIntoFile checks for a clash (two data chunks with
++				 * the same chunk_id).
++				 */
++
++				if (!in)
++					alloc_failed = 1;
++
++				if (in) {
++					if (!yaffs_put_chunk_in_file(in, tags.chunk_id, chunk, 1))
++						alloc_failed = 1;
++				}
++
++				endpos =
++				    (tags.chunk_id - 1) * dev->data_bytes_per_chunk +
++				    tags.n_bytes;
++				if (in &&
++				    in->variant_type == YAFFS_OBJECT_TYPE_FILE
++				    && in->variant.file_variant.scanned_size <
++				    endpos) {
++					in->variant.file_variant.
++					    scanned_size = endpos;
++					if (!dev->param.use_header_file_size) {
++						in->variant.file_variant.
++						    file_size =
++						    in->variant.file_variant.
++						    scanned_size;
++					}
++
++				}
++				/* T((" %d %d data %d %d\n",blk,c,tags.obj_id,tags.chunk_id));   */
++			} else {
++				/* chunk_id == 0, so it is an ObjectHeader.
++				 * Thus, we read in the object header and make the object
++				 */
++				yaffs_set_chunk_bit(dev, blk, c);
++				bi->pages_in_use++;
++
++				result = yaffs_rd_chunk_tags_nand(dev, chunk,
++								chunkData,
++								NULL);
++
++				oh = (yaffs_obj_header *) chunkData;
++
++				in = yaffs_find_by_number(dev,
++							      tags.obj_id);
++				if (in && in->variant_type != oh->type) {
++					/* This should not happen, but somehow
++					 * Wev'e ended up with an obj_id that has been reused but not yet
++					 * deleted, and worse still it has changed type. Delete the old object.
++					 */
++
++					yaffs_del_obj(in);
++
++					in = 0;
++				}
++
++				in = yaffs_find_or_create_by_number(dev,
++								      tags.
++								      obj_id,
++								      oh->type);
++
++				if (!in)
++					alloc_failed = 1;
++
++				if (in && oh->shadows_obj > 0) {
++
++					struct yaffs_shadow_fixer_s *fixer;
++					fixer = YMALLOC(sizeof(struct yaffs_shadow_fixer_s));
++					if (fixer) {
++						fixer->next = shadowFixerList;
++						shadowFixerList = fixer;
++						fixer->obj_id = tags.obj_id;
++						fixer->shadowed_id = oh->shadows_obj;
++						T(YAFFS_TRACE_SCAN,
++						  (TSTR
++						   (" Shadow fixer: %d shadows %d" TENDSTR),
++						   fixer->obj_id, fixer->shadowed_id));
++
++					}
++
++				}
++
++				if (in && in->valid) {
++					/* We have already filled this one. We have a duplicate and need to resolve it. */
++
++					unsigned existingSerial = in->serial;
++					unsigned newSerial = tags.serial_number;
++
++					if (((existingSerial + 1) & 3) == newSerial) {
++						/* Use new one - destroy the exisiting one */
++						yaffs_chunk_del(dev,
++								  in->hdr_chunk,
++								  1, __LINE__);
++						in->valid = 0;
++					} else {
++						/* Use existing - destroy this one. */
++						yaffs_chunk_del(dev, chunk, 1,
++								  __LINE__);
++					}
++				}
++
++				if (in && !in->valid &&
++				    (tags.obj_id == YAFFS_OBJECTID_ROOT ||
++				     tags.obj_id == YAFFS_OBJECTID_LOSTNFOUND)) {
++					/* We only load some info, don't fiddle with directory structure */
++					in->valid = 1;
++					in->variant_type = oh->type;
++
++					in->yst_mode = oh->yst_mode;
++#ifdef CONFIG_YAFFS_WINCE
++					in->win_atime[0] = oh->win_atime[0];
++					in->win_ctime[0] = oh->win_ctime[0];
++					in->win_mtime[0] = oh->win_mtime[0];
++					in->win_atime[1] = oh->win_atime[1];
++					in->win_ctime[1] = oh->win_ctime[1];
++					in->win_mtime[1] = oh->win_mtime[1];
++#else
++					in->yst_uid = oh->yst_uid;
++					in->yst_gid = oh->yst_gid;
++					in->yst_atime = oh->yst_atime;
++					in->yst_mtime = oh->yst_mtime;
++					in->yst_ctime = oh->yst_ctime;
++					in->yst_rdev = oh->yst_rdev;
++#endif
++					in->hdr_chunk = chunk;
++					in->serial = tags.serial_number;
++
++				} else if (in && !in->valid) {
++					/* we need to load this info */
++
++					in->valid = 1;
++					in->variant_type = oh->type;
++
++					in->yst_mode = oh->yst_mode;
++#ifdef CONFIG_YAFFS_WINCE
++					in->win_atime[0] = oh->win_atime[0];
++					in->win_ctime[0] = oh->win_ctime[0];
++					in->win_mtime[0] = oh->win_mtime[0];
++					in->win_atime[1] = oh->win_atime[1];
++					in->win_ctime[1] = oh->win_ctime[1];
++					in->win_mtime[1] = oh->win_mtime[1];
++#else
++					in->yst_uid = oh->yst_uid;
++					in->yst_gid = oh->yst_gid;
++					in->yst_atime = oh->yst_atime;
++					in->yst_mtime = oh->yst_mtime;
++					in->yst_ctime = oh->yst_ctime;
++					in->yst_rdev = oh->yst_rdev;
++#endif
++					in->hdr_chunk = chunk;
++					in->serial = tags.serial_number;
++
++					yaffs_set_obj_name_from_oh(in, oh);
++					in->dirty = 0;
++
++					/* directory stuff...
++					 * hook up to parent
++					 */
++
++					parent =
++					    yaffs_find_or_create_by_number
++					    (dev, oh->parent_obj_id,
++					     YAFFS_OBJECT_TYPE_DIRECTORY);
++					if (!parent)
++						alloc_failed = 1;
++					if (parent && parent->variant_type ==
++					    YAFFS_OBJECT_TYPE_UNKNOWN) {
++						/* Set up as a directory */
++						parent->variant_type =
++							YAFFS_OBJECT_TYPE_DIRECTORY;
++						YINIT_LIST_HEAD(&parent->variant.
++								dir_variant.
++								children);
++					} else if (!parent || parent->variant_type !=
++						   YAFFS_OBJECT_TYPE_DIRECTORY) {
++						/* Hoosterman, another problem....
++						 * We're trying to use a non-directory as a directory
++						 */
++
++						T(YAFFS_TRACE_ERROR,
++						  (TSTR
++						   ("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
++						    TENDSTR)));
++						parent = dev->lost_n_found;
++					}
++
++					yaffs_add_obj_to_dir(parent, in);
++
++					if (0 && (parent == dev->del_dir ||
++						  parent == dev->unlinked_dir)) {
++						in->deleted = 1;	/* If it is unlinked at start up then it wants deleting */
++						dev->n_deleted_files++;
++					}
++					/* Note re hardlinks.
++					 * Since we might scan a hardlink before its equivalent object is scanned
++					 * we put them all in a list.
++					 * After scanning is complete, we should have all the objects, so we run through this
++					 * list and fix up all the chains.
++					 */
++
++					switch (in->variant_type) {
++					case YAFFS_OBJECT_TYPE_UNKNOWN:
++						/* Todo got a problem */
++						break;
++					case YAFFS_OBJECT_TYPE_FILE:
++						if (dev->param.use_header_file_size)
++
++							in->variant.file_variant.
++							    file_size =
++							    oh->file_size;
++
++						break;
++					case YAFFS_OBJECT_TYPE_HARDLINK:
++						in->variant.hardlink_variant.
++							equiv_id =
++							oh->equiv_id;
++						in->hard_links.next =
++							(struct ylist_head *)
++							hard_list;
++						hard_list = in;
++						break;
++					case YAFFS_OBJECT_TYPE_DIRECTORY:
++						/* Do nothing */
++						break;
++					case YAFFS_OBJECT_TYPE_SPECIAL:
++						/* Do nothing */
++						break;
++					case YAFFS_OBJECT_TYPE_SYMLINK:
++						in->variant.symlink_variant.alias =
++						    yaffs_clone_str(oh->alias);
++						if (!in->variant.symlink_variant.alias)
++							alloc_failed = 1;
++						break;
++					}
++
++				}
++			}
++		}
++
++		if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
++			/* If we got this far while scanning, then the block is fully allocated.*/
++			state = YAFFS_BLOCK_STATE_FULL;
++		}
++
++		if (state == YAFFS_BLOCK_STATE_ALLOCATING) {
++			/* If the block was partially allocated then treat it as fully allocated.*/
++			state = YAFFS_BLOCK_STATE_FULL;
++			dev->alloc_block = -1;
++		}
++
++		bi->block_state = state;
++
++		/* Now let's see if it was dirty */
++		if (bi->pages_in_use == 0 &&
++		    !bi->has_shrink_hdr &&
++		    bi->block_state == YAFFS_BLOCK_STATE_FULL) {
++			yaffs_block_became_dirty(dev, blk);
++		}
++
++	}
++
++
++	/* Ok, we've done all the scanning.
++	 * Fix up the hard link chains.
++	 * We should now have scanned all the objects, now it's time to add these
++	 * hardlinks.
++	 */
++
++	yaffs_link_fixup(dev, hard_list);
++
++	/* Fix up any shadowed objects */
++	{
++		struct yaffs_shadow_fixer_s *fixer;
++		yaffs_obj_t *obj;
++
++		while (shadowFixerList) {
++			fixer = shadowFixerList;
++			shadowFixerList = fixer->next;
++			/* Complete the rename transaction by deleting the shadowed object
++			 * then setting the object header to unshadowed.
++			 */
++			obj = yaffs_find_by_number(dev, fixer->shadowed_id);
++			if (obj)
++				yaffs_del_obj(obj);
++
++			obj = yaffs_find_by_number(dev, fixer->obj_id);
++
++			if (obj)
++				yaffs_update_oh(obj, NULL, 1, 0, 0, NULL);
++
++			YFREE(fixer);
++		}
++	}
++
++	yaffs_release_temp_buffer(dev, chunkData, __LINE__);
++
++	if (alloc_failed)
++		return YAFFS_FAIL;
++
++	T(YAFFS_TRACE_SCAN, (TSTR("yaffs1_scan ends" TENDSTR)));
++
++
++	return YAFFS_OK;
++}
++
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffs_yaffs1.h linux-2.6.36-rc8.new/fs/yaffs2/yaffs_yaffs1.h
+--- linux-2.6.36-rc8/fs/yaffs2/yaffs_yaffs1.h	1970-01-01 02:00:00.000000000 +0200
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffs_yaffs1.h	2010-10-20 13:28:16.064000294 +0300
+@@ -0,0 +1,22 @@
++/*
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2010 Aleph One Ltd.
++ *   for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ */
++
++#ifndef __YAFFS_YAFFS1_H__
++#define __YAFFS_YAFFS1_H__
++
++#include "yaffs_guts.h"
++int yaffs1_scan(yaffs_dev_t *dev);
++
++#endif
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffs_yaffs2.c linux-2.6.36-rc8.new/fs/yaffs2/yaffs_yaffs2.c
+--- linux-2.6.36-rc8/fs/yaffs2/yaffs_yaffs2.c	1970-01-01 02:00:00.000000000 +0200
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffs_yaffs2.c	2010-10-20 13:28:16.050000294 +0300
+@@ -0,0 +1,1540 @@
++/*
++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2010 Aleph One Ltd.
++ *   for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ */
++
++
++#include "yaffs_guts.h"
++#include "yaffs_trace.h"
++#include "yaffs_yaffs2.h"
++#include "yaffs_checkptrw.h"
++#include "yaffs_bitmap.h"
++#include "yaffs_qsort.h"
++#include "yaffs_nand.h"
++#include "yaffs_getblockinfo.h"
++#include "yaffs_verify.h"
++
++/*
++ * Checkpoints are really no benefit on very small partitions.
++ *
++ * To save space on small partitions don't bother with checkpoints unless
++ * the partition is at least this big.
++ */
++#define YAFFS_CHECKPOINT_MIN_BLOCKS 60
++
++#define YAFFS_SMALL_HOLE_THRESHOLD 4
++
++
++/*
++ * Oldest Dirty Sequence Number handling.
++ */
++ 
++/* yaffs_calc_oldest_dirty_seq()
++ * yaffs2_find_oldest_dirty_seq()
++ * Calculate the oldest dirty sequence number if we don't know it.
++ */
++void yaffs_calc_oldest_dirty_seq(yaffs_dev_t *dev)
++{
++	int i;
++	unsigned seq;
++	unsigned block_no = 0;
++	yaffs_block_info_t *b;
++
++	if(!dev->param.is_yaffs2)
++		return;
++
++	/* Find the oldest dirty sequence number. */
++	seq = dev->seq_number + 1;
++	b = dev->block_info;
++	for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) {
++		if (b->block_state == YAFFS_BLOCK_STATE_FULL &&
++			(b->pages_in_use - b->soft_del_pages) < dev->param.chunks_per_block &&
++			b->seq_number < seq) {
++			seq = b->seq_number;
++			block_no = i;
++		}
++		b++;
++	}
++
++	if(block_no){
++		dev->oldest_dirty_seq = seq;
++		dev->oldest_dirty_block = block_no;
++	}
++
++}
++
++
++void yaffs2_find_oldest_dirty_seq(yaffs_dev_t *dev)
++{
++	if(!dev->param.is_yaffs2)
++		return;
++
++	if(!dev->oldest_dirty_seq)
++		yaffs_calc_oldest_dirty_seq(dev);
++}
++
++/*
++ * yaffs_clear_oldest_dirty_seq()
++ * Called when a block is erased or marked bad. (ie. when its seq_number
++ * becomes invalid). If the value matches the oldest then we clear 
++ * dev->oldest_dirty_seq to force its recomputation.
++ */
++void yaffs2_clear_oldest_dirty_seq(yaffs_dev_t *dev, yaffs_block_info_t *bi)
++{
++
++	if(!dev->param.is_yaffs2)
++		return;
++
++	if(!bi || bi->seq_number == dev->oldest_dirty_seq){
++		dev->oldest_dirty_seq = 0;
++		dev->oldest_dirty_block = 0;
++	}
++}
++
++/*
++ * yaffs2_update_oldest_dirty_seq()
++ * Update the oldest dirty sequence number whenever we dirty a block.
++ * Only do this if the oldest_dirty_seq is actually being tracked.
++ */
++void yaffs2_update_oldest_dirty_seq(yaffs_dev_t *dev, unsigned block_no, yaffs_block_info_t *bi)
++{
++	if(!dev->param.is_yaffs2)
++		return;
++
++	if(dev->oldest_dirty_seq){
++		if(dev->oldest_dirty_seq > bi->seq_number){
++			dev->oldest_dirty_seq = bi->seq_number;
++			dev->oldest_dirty_block = block_no;
++		}
++	}
++}
++
++int yaffs_block_ok_for_gc(yaffs_dev_t *dev,
++					yaffs_block_info_t *bi)
++{
++
++	if (!dev->param.is_yaffs2)
++		return 1;	/* disqualification only applies to yaffs2. */
++
++	if (!bi->has_shrink_hdr)
++		return 1;	/* can gc */
++
++	yaffs2_find_oldest_dirty_seq(dev);
++
++	/* Can't do gc of this block if there are any blocks older than this one that have
++	 * discarded pages.
++	 */
++	return (bi->seq_number <= dev->oldest_dirty_seq);
++}
++
++/*
++ * yaffs2_find_refresh_block()
++ * periodically finds the oldest full block by sequence number for refreshing.
++ * Only for yaffs2.
++ */
++__u32 yaffs2_find_refresh_block(yaffs_dev_t *dev)
++{
++	__u32 b ;
++
++	__u32 oldest = 0;
++	__u32 oldestSequence = 0;
++
++	yaffs_block_info_t *bi;
++
++	if(!dev->param.is_yaffs2)
++		return oldest;
++
++	/*
++	 * If refresh period < 10 then refreshing is disabled.
++	 */
++	if(dev->param.refresh_period < 10)
++	        return oldest;
++
++        /*
++         * Fix broken values.
++         */
++        if(dev->refresh_skip > dev->param.refresh_period)
++                dev->refresh_skip = dev->param.refresh_period;
++
++	if(dev->refresh_skip > 0)
++	        return oldest;
++
++	/*
++	 * Refresh skip is now zero.
++	 * We'll do a refresh this time around....
++	 * Update the refresh skip and find the oldest block.
++	 */
++	dev->refresh_skip = dev->param.refresh_period;
++	dev->refresh_count++;
++	bi = dev->block_info;
++	for (b = dev->internal_start_block; b <=dev->internal_end_block; b++){
++
++		if (bi->block_state == YAFFS_BLOCK_STATE_FULL){
++
++			if(oldest < 1 ||
++                                bi->seq_number < oldestSequence){
++                                oldest = b;
++                                oldestSequence = bi->seq_number;
++                        }
++		}
++		bi++;
++	}
++
++	if (oldest > 0) {
++		T(YAFFS_TRACE_GC,
++		  (TSTR("GC refresh count %d selected block %d with seq_number %d" TENDSTR),
++		   dev->refresh_count, oldest, oldestSequence));
++	}
++
++	return oldest;
++}
++
++int yaffs2_checkpt_required(yaffs_dev_t *dev)
++{
++	int nblocks;
++	
++	if(!dev->param.is_yaffs2)
++		return 0;
++	
++	nblocks = dev->internal_end_block - dev->internal_start_block + 1 ;
++
++	return 	!dev->param.skip_checkpt_wr &&
++		!dev->read_only &&
++		(nblocks >= YAFFS_CHECKPOINT_MIN_BLOCKS);
++}
++
++int yaffs_calc_checkpt_blocks_required(yaffs_dev_t *dev)
++{
++	int retval;
++
++	if(!dev->param.is_yaffs2)
++		return 0;
++
++	if (!dev->checkpoint_blocks_required &&
++		yaffs2_checkpt_required(dev)){
++		/* Not a valid value so recalculate */
++		int n_bytes = 0;
++		int nBlocks;
++		int devBlocks = (dev->param.end_block - dev->param.start_block + 1);
++
++		n_bytes += sizeof(yaffs_checkpt_validty_t);
++		n_bytes += sizeof(yaffs_checkpt_dev_t);
++		n_bytes += devBlocks * sizeof(yaffs_block_info_t);
++		n_bytes += devBlocks * dev->chunk_bit_stride;
++		n_bytes += (sizeof(yaffs_checkpt_obj_t) + sizeof(__u32)) * (dev->n_obj);
++		n_bytes += (dev->tnode_size + sizeof(__u32)) * (dev->n_tnodes);
++		n_bytes += sizeof(yaffs_checkpt_validty_t);
++		n_bytes += sizeof(__u32); /* checksum*/
++
++		/* Round up and add 2 blocks to allow for some bad blocks, so add 3 */
++
++		nBlocks = (n_bytes/(dev->data_bytes_per_chunk * dev->param.chunks_per_block)) + 3;
++
++		dev->checkpoint_blocks_required = nBlocks;
++	}
++
++	retval = dev->checkpoint_blocks_required - dev->blocks_in_checkpt;
++	if(retval < 0)
++		retval = 0;
++	return retval;
++}
++
++/*--------------------- Checkpointing --------------------*/
++
++
++static int yaffs2_wr_checkpt_validity_marker(yaffs_dev_t *dev, int head)
++{
++	yaffs_checkpt_validty_t cp;
++
++	memset(&cp, 0, sizeof(cp));
++
++	cp.struct_type = sizeof(cp);
++	cp.magic = YAFFS_MAGIC;
++	cp.version = YAFFS_CHECKPOINT_VERSION;
++	cp.head = (head) ? 1 : 0;
++
++	return (yaffs2_checkpt_wr(dev, &cp, sizeof(cp)) == sizeof(cp)) ?
++		1 : 0;
++}
++
++static int yaffs2_rd_checkpt_validty_marker(yaffs_dev_t *dev, int head)
++{
++	yaffs_checkpt_validty_t cp;
++	int ok;
++
++	ok = (yaffs2_checkpt_rd(dev, &cp, sizeof(cp)) == sizeof(cp));
++
++	if (ok)
++		ok = (cp.struct_type == sizeof(cp)) &&
++		     (cp.magic == YAFFS_MAGIC) &&
++		     (cp.version == YAFFS_CHECKPOINT_VERSION) &&
++		     (cp.head == ((head) ? 1 : 0));
++	return ok ? 1 : 0;
++}
++
++static void yaffs2_dev_to_checkpt_dev(yaffs_checkpt_dev_t *cp,
++					   yaffs_dev_t *dev)
++{
++	cp->n_erased_blocks = dev->n_erased_blocks;
++	cp->alloc_block = dev->alloc_block;
++	cp->alloc_page = dev->alloc_page;
++	cp->n_free_chunks = dev->n_free_chunks;
++
++	cp->n_deleted_files = dev->n_deleted_files;
++	cp->n_unlinked_files = dev->n_unlinked_files;
++	cp->n_bg_deletions = dev->n_bg_deletions;
++	cp->seq_number = dev->seq_number;
++
++}
++
++static void yaffs_checkpt_dev_to_dev(yaffs_dev_t *dev,
++					   yaffs_checkpt_dev_t *cp)
++{
++	dev->n_erased_blocks = cp->n_erased_blocks;
++	dev->alloc_block = cp->alloc_block;
++	dev->alloc_page = cp->alloc_page;
++	dev->n_free_chunks = cp->n_free_chunks;
++
++	dev->n_deleted_files = cp->n_deleted_files;
++	dev->n_unlinked_files = cp->n_unlinked_files;
++	dev->n_bg_deletions = cp->n_bg_deletions;
++	dev->seq_number = cp->seq_number;
++}
++
++
++static int yaffs2_wr_checkpt_dev(yaffs_dev_t *dev)
++{
++	yaffs_checkpt_dev_t cp;
++	__u32 n_bytes;
++	__u32 nBlocks = (dev->internal_end_block - dev->internal_start_block + 1);
++
++	int ok;
++
++	/* Write device runtime values*/
++	yaffs2_dev_to_checkpt_dev(&cp, dev);
++	cp.struct_type = sizeof(cp);
++
++	ok = (yaffs2_checkpt_wr(dev, &cp, sizeof(cp)) == sizeof(cp));
++
++	/* Write block info */
++	if (ok) {
++		n_bytes = nBlocks * sizeof(yaffs_block_info_t);
++		ok = (yaffs2_checkpt_wr(dev, dev->block_info, n_bytes) == n_bytes);
++	}
++
++	/* Write chunk bits */
++	if (ok) {
++		n_bytes = nBlocks * dev->chunk_bit_stride;
++		ok = (yaffs2_checkpt_wr(dev, dev->chunk_bits, n_bytes) == n_bytes);
++	}
++	return	 ok ? 1 : 0;
++
++}
++
++static int yaffs2_rd_checkpt_dev(yaffs_dev_t *dev)
++{
++	yaffs_checkpt_dev_t cp;
++	__u32 n_bytes;
++	__u32 nBlocks = (dev->internal_end_block - dev->internal_start_block + 1);
++
++	int ok;
++
++	ok = (yaffs2_checkpt_rd(dev, &cp, sizeof(cp)) == sizeof(cp));
++	if (!ok)
++		return 0;
++
++	if (cp.struct_type != sizeof(cp))
++		return 0;
++
++
++	yaffs_checkpt_dev_to_dev(dev, &cp);
++
++	n_bytes = nBlocks * sizeof(yaffs_block_info_t);
++
++	ok = (yaffs2_checkpt_rd(dev, dev->block_info, n_bytes) == n_bytes);
++
++	if (!ok)
++		return 0;
++	n_bytes = nBlocks * dev->chunk_bit_stride;
++
++	ok = (yaffs2_checkpt_rd(dev, dev->chunk_bits, n_bytes) == n_bytes);
++
++	return ok ? 1 : 0;
++}
++
++static void yaffs2_obj_checkpt_obj(yaffs_checkpt_obj_t *cp,
++					   yaffs_obj_t *obj)
++{
++
++	cp->obj_id = obj->obj_id;
++	cp->parent_id = (obj->parent) ? obj->parent->obj_id : 0;
++	cp->hdr_chunk = obj->hdr_chunk;
++	cp->variant_type = obj->variant_type;
++	cp->deleted = obj->deleted;
++	cp->soft_del = obj->soft_del;
++	cp->unlinked = obj->unlinked;
++	cp->fake = obj->fake;
++	cp->rename_allowed = obj->rename_allowed;
++	cp->unlink_allowed = obj->unlink_allowed;
++	cp->serial = obj->serial;
++	cp->n_data_chunks = obj->n_data_chunks;
++
++	if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE)
++		cp->size_or_equiv_obj = obj->variant.file_variant.file_size;
++	else if (obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK)
++		cp->size_or_equiv_obj = obj->variant.hardlink_variant.equiv_id;
++}
++
++static int taffs2_checkpt_obj_to_obj(yaffs_obj_t *obj, yaffs_checkpt_obj_t *cp)
++{
++
++	yaffs_obj_t *parent;
++
++	if (obj->variant_type != cp->variant_type) {
++		T(YAFFS_TRACE_ERROR, (TSTR("Checkpoint read object %d type %d "
++			TCONT("chunk %d does not match existing object type %d")
++			TENDSTR), cp->obj_id, cp->variant_type, cp->hdr_chunk,
++			obj->variant_type));
++		return 0;
++	}
++
++	obj->obj_id = cp->obj_id;
++
++	if (cp->parent_id)
++		parent = yaffs_find_or_create_by_number(
++					obj->my_dev,
++					cp->parent_id,
++					YAFFS_OBJECT_TYPE_DIRECTORY);
++	else
++		parent = NULL;
++
++	if (parent) {
++		if (parent->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
++			T(YAFFS_TRACE_ALWAYS, (TSTR("Checkpoint read object %d parent %d type %d"
++				TCONT(" chunk %d Parent type, %d, not directory")
++				TENDSTR),
++				cp->obj_id, cp->parent_id, cp->variant_type,
++				cp->hdr_chunk, parent->variant_type));
++			return 0;
++		}
++		yaffs_add_obj_to_dir(parent, obj);
++	}
++
++	obj->hdr_chunk = cp->hdr_chunk;
++	obj->variant_type = cp->variant_type;
++	obj->deleted = cp->deleted;
++	obj->soft_del = cp->soft_del;
++	obj->unlinked = cp->unlinked;
++	obj->fake = cp->fake;
++	obj->rename_allowed = cp->rename_allowed;
++	obj->unlink_allowed = cp->unlink_allowed;
++	obj->serial = cp->serial;
++	obj->n_data_chunks = cp->n_data_chunks;
++
++	if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE)
++		obj->variant.file_variant.file_size = cp->size_or_equiv_obj;
++	else if (obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK)
++		obj->variant.hardlink_variant.equiv_id = cp->size_or_equiv_obj;
++
++	if (obj->hdr_chunk > 0)
++		obj->lazy_loaded = 1;
++	return 1;
++}
++
++
++
++static int yaffs2_checkpt_tnode_worker(yaffs_obj_t *in, yaffs_tnode_t *tn,
++					__u32 level, int chunk_offset)
++{
++	int i;
++	yaffs_dev_t *dev = in->my_dev;
++	int ok = 1;
++
++	if (tn) {
++		if (level > 0) {
++
++			for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) {
++				if (tn->internal[i]) {
++					ok = yaffs2_checkpt_tnode_worker(in,
++							tn->internal[i],
++							level - 1,
++							(chunk_offset<<YAFFS_TNODES_INTERNAL_BITS) + i);
++				}
++			}
++		} else if (level == 0) {
++			__u32 baseOffset = chunk_offset <<  YAFFS_TNODES_LEVEL0_BITS;
++			ok = (yaffs2_checkpt_wr(dev, &baseOffset, sizeof(baseOffset)) == sizeof(baseOffset));
++			if (ok)
++				ok = (yaffs2_checkpt_wr(dev, tn, dev->tnode_size) == dev->tnode_size);
++		}
++	}
++
++	return ok;
++
++}
++
++static int yaffs2_wr_checkpt_tnodes(yaffs_obj_t *obj)
++{
++	__u32 endMarker = ~0;
++	int ok = 1;
++
++	if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE) {
++		ok = yaffs2_checkpt_tnode_worker(obj,
++					    obj->variant.file_variant.top,
++					    obj->variant.file_variant.top_level,
++					    0);
++		if (ok)
++			ok = (yaffs2_checkpt_wr(obj->my_dev, &endMarker, sizeof(endMarker)) ==
++				sizeof(endMarker));
++	}
++
++	return ok ? 1 : 0;
++}
++
++static int yaffs2_rd_checkpt_tnodes(yaffs_obj_t *obj)
++{
++	__u32 baseChunk;
++	int ok = 1;
++	yaffs_dev_t *dev = obj->my_dev;
++	yaffs_file_s *fileStructPtr = &obj->variant.file_variant;
++	yaffs_tnode_t *tn;
++	int nread = 0;
++
++	ok = (yaffs2_checkpt_rd(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk));
++
++	while (ok && (~baseChunk)) {
++		nread++;
++		/* Read level 0 tnode */
++
++
++		tn = yaffs_get_tnode(dev);
++		if (tn){
++			ok = (yaffs2_checkpt_rd(dev, tn, dev->tnode_size) == dev->tnode_size);
++		} else
++			ok = 0;
++
++		if (tn && ok)
++			ok = yaffs_add_find_tnode_0(dev,
++							fileStructPtr,
++							baseChunk,
++							tn) ? 1 : 0;
++
++		if (ok)
++			ok = (yaffs2_checkpt_rd(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk));
++
++	}
++
++	T(YAFFS_TRACE_CHECKPOINT, (
++		TSTR("Checkpoint read tnodes %d records, last %d. ok %d" TENDSTR),
++		nread, baseChunk, ok));
++
++	return ok ? 1 : 0;
++}
++
++
++static int yaffs2_wr_checkpt_objs(yaffs_dev_t *dev)
++{
++	yaffs_obj_t *obj;
++	yaffs_checkpt_obj_t cp;
++	int i;
++	int ok = 1;
++	struct ylist_head *lh;
++
++
++	/* Iterate through the objects in each hash entry,
++	 * dumping them to the checkpointing stream.
++	 */
++
++	for (i = 0; ok &&  i <  YAFFS_NOBJECT_BUCKETS; i++) {
++		ylist_for_each(lh, &dev->obj_bucket[i].list) {
++			if (lh) {
++				obj = ylist_entry(lh, yaffs_obj_t, hash_link);
++				if (!obj->defered_free) {
++					yaffs2_obj_checkpt_obj(&cp, obj);
++					cp.struct_type = sizeof(cp);
++
++					T(YAFFS_TRACE_CHECKPOINT, (
++						TSTR("Checkpoint write object %d parent %d type %d chunk %d obj addr %p" TENDSTR),
++						cp.obj_id, cp.parent_id, cp.variant_type, cp.hdr_chunk, obj));
++
++					ok = (yaffs2_checkpt_wr(dev, &cp, sizeof(cp)) == sizeof(cp));
++
++					if (ok && obj->variant_type == YAFFS_OBJECT_TYPE_FILE)
++						ok = yaffs2_wr_checkpt_tnodes(obj);
++				}
++			}
++		}
++	}
++
++	/* Dump end of list */
++	memset(&cp, 0xFF, sizeof(yaffs_checkpt_obj_t));
++	cp.struct_type = sizeof(cp);
++
++	if (ok)
++		ok = (yaffs2_checkpt_wr(dev, &cp, sizeof(cp)) == sizeof(cp));
++
++	return ok ? 1 : 0;
++}
++
++static int yaffs2_rd_checkpt_objs(yaffs_dev_t *dev)
++{
++	yaffs_obj_t *obj;
++	yaffs_checkpt_obj_t cp;
++	int ok = 1;
++	int done = 0;
++	yaffs_obj_t *hard_list = NULL;
++
++	while (ok && !done) {
++		ok = (yaffs2_checkpt_rd(dev, &cp, sizeof(cp)) == sizeof(cp));
++		if (cp.struct_type != sizeof(cp)) {
++			T(YAFFS_TRACE_CHECKPOINT, (TSTR("struct size %d instead of %d ok %d"TENDSTR),
++				cp.struct_type, (int)sizeof(cp), ok));
++			ok = 0;
++		}
++
++		T(YAFFS_TRACE_CHECKPOINT, (TSTR("Checkpoint read object %d parent %d type %d chunk %d " TENDSTR),
++			cp.obj_id, cp.parent_id, cp.variant_type, cp.hdr_chunk));
++
++		if (ok && cp.obj_id == ~0)
++			done = 1;
++		else if (ok) {
++			obj = yaffs_find_or_create_by_number(dev, cp.obj_id, cp.variant_type);
++			if (obj) {
++				ok = taffs2_checkpt_obj_to_obj(obj, &cp);
++				if (!ok)
++					break;
++				if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE) {
++					ok = yaffs2_rd_checkpt_tnodes(obj);
++				} else if (obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK) {
++					obj->hard_links.next =
++						(struct ylist_head *) hard_list;
++					hard_list = obj;
++				}
++			} else
++				ok = 0;
++		}
++	}
++
++	if (ok)
++		yaffs_link_fixup(dev, hard_list);
++
++	return ok ? 1 : 0;
++}
++
++static int yaffs2_wr_checkpt_sum(yaffs_dev_t *dev)
++{
++	__u32 checkpt_sum;
++	int ok;
++
++	yaffs2_get_checkpt_sum(dev, &checkpt_sum);
++
++	ok = (yaffs2_checkpt_wr(dev, &checkpt_sum, sizeof(checkpt_sum)) == sizeof(checkpt_sum));
++
++	if (!ok)
++		return 0;
++
++	return 1;
++}
++
++static int yaffs2_rd_checkpt_sum(yaffs_dev_t *dev)
++{
++	__u32 checkpt_sum0;
++	__u32 checkpt_sum1;
++	int ok;
++
++	yaffs2_get_checkpt_sum(dev, &checkpt_sum0);
++
++	ok = (yaffs2_checkpt_rd(dev, &checkpt_sum1, sizeof(checkpt_sum1)) == sizeof(checkpt_sum1));
++
++	if (!ok)
++		return 0;
++
++	if (checkpt_sum0 != checkpt_sum1)
++		return 0;
++
++	return 1;
++}
++
++
++static int yaffs2_wr_checkpt_data(yaffs_dev_t *dev)
++{
++	int ok = 1;
++
++	if (!yaffs2_checkpt_required(dev)) {
++		T(YAFFS_TRACE_CHECKPOINT, (TSTR("skipping checkpoint write" TENDSTR)));
++		ok = 0;
++	}
++
++	if (ok)
++		ok = yaffs2_checkpt_open(dev, 1);
++
++	if (ok) {
++		T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint validity" TENDSTR)));
++		ok = yaffs2_wr_checkpt_validity_marker(dev, 1);
++	}
++	if (ok) {
++		T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint device" TENDSTR)));
++		ok = yaffs2_wr_checkpt_dev(dev);
++	}
++	if (ok) {
++		T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint objects" TENDSTR)));
++		ok = yaffs2_wr_checkpt_objs(dev);
++	}
++	if (ok) {
++		T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint validity" TENDSTR)));
++		ok = yaffs2_wr_checkpt_validity_marker(dev, 0);
++	}
++
++	if (ok)
++		ok = yaffs2_wr_checkpt_sum(dev);
++
++	if (!yaffs_checkpt_close(dev))
++		ok = 0;
++
++	if (ok)
++		dev->is_checkpointed = 1;
++	else
++		dev->is_checkpointed = 0;
++
++	return dev->is_checkpointed;
++}
++
++static int yaffs2_rd_checkpt_data(yaffs_dev_t *dev)
++{
++	int ok = 1;
++	
++	if(!dev->param.is_yaffs2)
++		ok = 0;
++
++	if (ok && dev->param.skip_checkpt_rd) {
++		T(YAFFS_TRACE_CHECKPOINT, (TSTR("skipping checkpoint read" TENDSTR)));
++		ok = 0;
++	}
++
++	if (ok)
++		ok = yaffs2_checkpt_open(dev, 0); /* open for read */
++
++	if (ok) {
++		T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint validity" TENDSTR)));
++		ok = yaffs2_rd_checkpt_validty_marker(dev, 1);
++	}
++	if (ok) {
++		T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint device" TENDSTR)));
++		ok = yaffs2_rd_checkpt_dev(dev);
++	}
++	if (ok) {
++		T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint objects" TENDSTR)));
++		ok = yaffs2_rd_checkpt_objs(dev);
++	}
++	if (ok) {
++		T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint validity" TENDSTR)));
++		ok = yaffs2_rd_checkpt_validty_marker(dev, 0);
++	}
++
++	if (ok) {
++		ok = yaffs2_rd_checkpt_sum(dev);
++		T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint checksum %d" TENDSTR), ok));
++	}
++
++	if (!yaffs_checkpt_close(dev))
++		ok = 0;
++
++	if (ok)
++		dev->is_checkpointed = 1;
++	else
++		dev->is_checkpointed = 0;
++
++	return ok ? 1 : 0;
++
++}
++
++void yaffs2_checkpt_invalidate(yaffs_dev_t *dev)
++{
++	if (dev->is_checkpointed ||
++			dev->blocks_in_checkpt > 0) {
++		dev->is_checkpointed = 0;
++		yaffs2_checkpt_invalidate_stream(dev);
++	}
++	if (dev->param.sb_dirty_fn)
++		dev->param.sb_dirty_fn(dev);
++}
++
++
++int yaffs_checkpoint_save(yaffs_dev_t *dev)
++{
++
++	T(YAFFS_TRACE_CHECKPOINT, (TSTR("save entry: is_checkpointed %d"TENDSTR), dev->is_checkpointed));
++
++	yaffs_verify_objects(dev);
++	yaffs_verify_blocks(dev);
++	yaffs_verify_free_chunks(dev);
++
++	if (!dev->is_checkpointed) {
++		yaffs2_checkpt_invalidate(dev);
++		yaffs2_wr_checkpt_data(dev);
++	}
++
++	T(YAFFS_TRACE_ALWAYS, (TSTR("save exit: is_checkpointed %d"TENDSTR), dev->is_checkpointed));
++
++	return dev->is_checkpointed;
++}
++
++int yaffs2_checkpt_restore(yaffs_dev_t *dev)
++{
++	int retval;
++	T(YAFFS_TRACE_CHECKPOINT, (TSTR("restore entry: is_checkpointed %d"TENDSTR), dev->is_checkpointed));
++
++	retval = yaffs2_rd_checkpt_data(dev);
++
++	if (dev->is_checkpointed) {
++		yaffs_verify_objects(dev);
++		yaffs_verify_blocks(dev);
++		yaffs_verify_free_chunks(dev);
++	}
++
++	T(YAFFS_TRACE_CHECKPOINT, (TSTR("restore exit: is_checkpointed %d"TENDSTR), dev->is_checkpointed));
++
++	return retval;
++}
++
++int yaffs2_handle_hole(yaffs_obj_t *obj, loff_t new_size)
++{
++	/* if newsSize > oldFileSize.
++	 * We're going to be writing a hole.
++	 * If the hole is small then write zeros otherwise write a start of hole marker.
++	 */
++		
++
++	loff_t oldFileSize;
++	int increase;
++	int smallHole   ;
++	int result = YAFFS_OK;
++	yaffs_dev_t *dev = NULL;
++
++	__u8 *localBuffer = NULL;
++	
++	int smallIncreaseOk = 0;
++	
++	if(!obj)
++		return YAFFS_FAIL;
++
++	if(obj->variant_type != YAFFS_OBJECT_TYPE_FILE)
++		return YAFFS_FAIL;
++	
++	dev = obj->my_dev;
++	
++	/* Bail out if not yaffs2 mode */
++	if(!dev->param.is_yaffs2)
++		return YAFFS_OK;
++
++	oldFileSize = obj->variant.file_variant.file_size;
++
++	if (new_size <= oldFileSize)
++		return YAFFS_OK;
++
++	increase = new_size - oldFileSize;
++
++	if(increase < YAFFS_SMALL_HOLE_THRESHOLD * dev->data_bytes_per_chunk &&
++		yaffs_check_alloc_available(dev, YAFFS_SMALL_HOLE_THRESHOLD + 1))
++		smallHole = 1;
++	else
++		smallHole = 0;
++
++	if(smallHole)
++		localBuffer= yaffs_get_temp_buffer(dev, __LINE__);
++	
++	if(localBuffer){
++		/* fill hole with zero bytes */
++		int pos = oldFileSize;
++		int thisWrite;
++		int written;
++		memset(localBuffer,0,dev->data_bytes_per_chunk);
++		smallIncreaseOk = 1;
++
++		while(increase > 0 && smallIncreaseOk){
++			thisWrite = increase;
++			if(thisWrite > dev->data_bytes_per_chunk)
++				thisWrite = dev->data_bytes_per_chunk;
++			written = yaffs_do_file_wr(obj,localBuffer,pos,thisWrite,0);
++			if(written == thisWrite){
++				pos += thisWrite;
++				increase -= thisWrite;
++			} else
++				smallIncreaseOk = 0;
++		}
++
++		yaffs_release_temp_buffer(dev,localBuffer,__LINE__);
++
++		/* If we were out of space then reverse any chunks we've added */		
++		if(!smallIncreaseOk)
++			yaffs_resize_file_down(obj, oldFileSize);
++	}
++	
++	if (!smallIncreaseOk &&
++		obj->parent &&
++		obj->parent->obj_id != YAFFS_OBJECTID_UNLINKED &&
++		obj->parent->obj_id != YAFFS_OBJECTID_DELETED){
++		/* Write a hole start header with the old file size */
++		yaffs_update_oh(obj, NULL, 0, 1, 0, NULL);
++	}
++
++	return result;
++
++}
++
++
++typedef struct {
++	int seq;
++	int block;
++} yaffs_BlockIndex;
++
++
++static int yaffs2_ybicmp(const void *a, const void *b)
++{
++	register int aseq = ((yaffs_BlockIndex *)a)->seq;
++	register int bseq = ((yaffs_BlockIndex *)b)->seq;
++	register int ablock = ((yaffs_BlockIndex *)a)->block;
++	register int bblock = ((yaffs_BlockIndex *)b)->block;
++	if (aseq == bseq)
++		return ablock - bblock;
++	else
++		return aseq - bseq;
++}
++
++int yaffs2_scan_backwards(yaffs_dev_t *dev)
++{
++	yaffs_ext_tags tags;
++	int blk;
++	int blockIterator;
++	int startIterator;
++	int endIterator;
++	int nBlocksToScan = 0;
++
++	int chunk;
++	int result;
++	int c;
++	int deleted;
++	yaffs_block_state_t state;
++	yaffs_obj_t *hard_list = NULL;
++	yaffs_block_info_t *bi;
++	__u32 seq_number;
++	yaffs_obj_header *oh;
++	yaffs_obj_t *in;
++	yaffs_obj_t *parent;
++	int nBlocks = dev->internal_end_block - dev->internal_start_block + 1;
++	int itsUnlinked;
++	__u8 *chunkData;
++
++	int file_size;
++	int is_shrink;
++	int foundChunksInBlock;
++	int equiv_id;
++	int alloc_failed = 0;
++
++
++	yaffs_BlockIndex *blockIndex = NULL;
++	int altBlockIndex = 0;
++
++	T(YAFFS_TRACE_SCAN,
++	  (TSTR
++	   ("yaffs2_scan_backwards starts  intstartblk %d intendblk %d..."
++	    TENDSTR), dev->internal_start_block, dev->internal_end_block));
++
++
++	dev->seq_number = YAFFS_LOWEST_SEQUENCE_NUMBER;
++
++	blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex));
++
++	if (!blockIndex) {
++		blockIndex = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockIndex));
++		altBlockIndex = 1;
++	}
++
++	if (!blockIndex) {
++		T(YAFFS_TRACE_SCAN,
++		  (TSTR("yaffs2_scan_backwards() could not allocate block index!" TENDSTR)));
++		return YAFFS_FAIL;
++	}
++
++	dev->blocks_in_checkpt = 0;
++
++	chunkData = yaffs_get_temp_buffer(dev, __LINE__);
++
++	/* Scan all the blocks to determine their state */
++	bi = dev->block_info;
++	for (blk = dev->internal_start_block; blk <= dev->internal_end_block; blk++) {
++		yaffs_clear_chunk_bits(dev, blk);
++		bi->pages_in_use = 0;
++		bi->soft_del_pages = 0;
++
++		yaffs_query_init_block_state(dev, blk, &state, &seq_number);
++
++		bi->block_state = state;
++		bi->seq_number = seq_number;
++
++		if (bi->seq_number == YAFFS_SEQUENCE_CHECKPOINT_DATA)
++			bi->block_state = state = YAFFS_BLOCK_STATE_CHECKPOINT;
++		if (bi->seq_number == YAFFS_SEQUENCE_BAD_BLOCK)
++			bi->block_state = state = YAFFS_BLOCK_STATE_DEAD;
++
++		T(YAFFS_TRACE_SCAN_DEBUG,
++		  (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk,
++		   state, seq_number));
++
++
++		if (state == YAFFS_BLOCK_STATE_CHECKPOINT) {
++			dev->blocks_in_checkpt++;
++
++		} else if (state == YAFFS_BLOCK_STATE_DEAD) {
++			T(YAFFS_TRACE_BAD_BLOCKS,
++			  (TSTR("block %d is bad" TENDSTR), blk));
++		} else if (state == YAFFS_BLOCK_STATE_EMPTY) {
++			T(YAFFS_TRACE_SCAN_DEBUG,
++			  (TSTR("Block empty " TENDSTR)));
++			dev->n_erased_blocks++;
++			dev->n_free_chunks += dev->param.chunks_per_block;
++		} else if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
++
++			/* Determine the highest sequence number */
++			if (seq_number >= YAFFS_LOWEST_SEQUENCE_NUMBER &&
++			    seq_number < YAFFS_HIGHEST_SEQUENCE_NUMBER) {
++
++				blockIndex[nBlocksToScan].seq = seq_number;
++				blockIndex[nBlocksToScan].block = blk;
++
++				nBlocksToScan++;
++
++				if (seq_number >= dev->seq_number)
++					dev->seq_number = seq_number;
++			} else {
++				/* TODO: Nasty sequence number! */
++				T(YAFFS_TRACE_SCAN,
++				  (TSTR
++				   ("Block scanning block %d has bad sequence number %d"
++				    TENDSTR), blk, seq_number));
++
++			}
++		}
++		bi++;
++	}
++
++	T(YAFFS_TRACE_SCAN,
++	(TSTR("%d blocks to be sorted..." TENDSTR), nBlocksToScan));
++
++
++
++	YYIELD();
++
++	/* Sort the blocks by sequence number*/
++	yaffs_qsort(blockIndex, nBlocksToScan, sizeof(yaffs_BlockIndex), yaffs2_ybicmp);
++
++	YYIELD();
++
++	T(YAFFS_TRACE_SCAN, (TSTR("...done" TENDSTR)));
++
++	/* Now scan the blocks looking at the data. */
++	startIterator = 0;
++	endIterator = nBlocksToScan - 1;
++	T(YAFFS_TRACE_SCAN_DEBUG,
++	  (TSTR("%d blocks to be scanned" TENDSTR), nBlocksToScan));
++
++	/* For each block.... backwards */
++	for (blockIterator = endIterator; !alloc_failed && blockIterator >= startIterator;
++			blockIterator--) {
++		/* Cooperative multitasking! This loop can run for so
++		   long that watchdog timers expire. */
++		YYIELD();
++
++		/* get the block to scan in the correct order */
++		blk = blockIndex[blockIterator].block;
++
++		bi = yaffs_get_block_info(dev, blk);
++
++
++		state = bi->block_state;
++
++		deleted = 0;
++
++		/* For each chunk in each block that needs scanning.... */
++		foundChunksInBlock = 0;
++		for (c = dev->param.chunks_per_block - 1;
++		     !alloc_failed && c >= 0 &&
++		     (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
++		      state == YAFFS_BLOCK_STATE_ALLOCATING); c--) {
++			/* Scan backwards...
++			 * Read the tags and decide what to do
++			 */
++
++			chunk = blk * dev->param.chunks_per_block + c;
++
++			result = yaffs_rd_chunk_tags_nand(dev, chunk, NULL,
++							&tags);
++
++			/* Let's have a good look at this chunk... */
++
++			if (!tags.chunk_used) {
++				/* An unassigned chunk in the block.
++				 * If there are used chunks after this one, then
++				 * it is a chunk that was skipped due to failing the erased
++				 * check. Just skip it so that it can be deleted.
++				 * But, more typically, We get here when this is an unallocated
++				 * chunk and his means that either the block is empty or
++				 * this is the one being allocated from
++				 */
++
++				if (foundChunksInBlock) {
++					/* This is a chunk that was skipped due to failing the erased check */
++				} else if (c == 0) {
++					/* We're looking at the first chunk in the block so the block is unused */
++					state = YAFFS_BLOCK_STATE_EMPTY;
++					dev->n_erased_blocks++;
++				} else {
++					if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
++					    state == YAFFS_BLOCK_STATE_ALLOCATING) {
++						if (dev->seq_number == bi->seq_number) {
++							/* this is the block being allocated from */
++
++							T(YAFFS_TRACE_SCAN,
++							  (TSTR
++							   (" Allocating from %d %d"
++							    TENDSTR), blk, c));
++
++							state = YAFFS_BLOCK_STATE_ALLOCATING;
++							dev->alloc_block = blk;
++							dev->alloc_page = c;
++							dev->alloc_block_finder = blk;
++						} else {
++							/* This is a partially written block that is not
++							 * the current allocation block.
++							 */
++
++							 T(YAFFS_TRACE_SCAN,
++							 (TSTR("Partially written block %d detected" TENDSTR),
++							 blk));
++						}
++					}
++				}
++
++				dev->n_free_chunks++;
++
++			} else if (tags.ecc_result == YAFFS_ECC_RESULT_UNFIXED) {
++				T(YAFFS_TRACE_SCAN,
++				  (TSTR(" Unfixed ECC in chunk(%d:%d), chunk ignored"TENDSTR),
++				  blk, c));
++
++				  dev->n_free_chunks++;
++
++			} else if (tags.obj_id > YAFFS_MAX_OBJECT_ID ||
++				tags.chunk_id > YAFFS_MAX_CHUNK_ID ||
++				(tags.chunk_id > 0 && tags.n_bytes > dev->data_bytes_per_chunk) ||
++				tags.seq_number != bi->seq_number ) {
++				T(YAFFS_TRACE_SCAN,
++				  (TSTR("Chunk (%d:%d) with bad tags:obj = %d, chunk_id = %d, n_bytes = %d, ignored"TENDSTR),
++				  blk, c,tags.obj_id, tags.chunk_id, tags.n_bytes));
++
++				  dev->n_free_chunks++;
++
++			} else if (tags.chunk_id > 0) {
++				/* chunk_id > 0 so it is a data chunk... */
++				unsigned int endpos;
++				__u32 chunkBase =
++				    (tags.chunk_id - 1) * dev->data_bytes_per_chunk;
++
++				foundChunksInBlock = 1;
++
++
++				yaffs_set_chunk_bit(dev, blk, c);
++				bi->pages_in_use++;
++
++				in = yaffs_find_or_create_by_number(dev,
++								      tags.
++								      obj_id,
++								      YAFFS_OBJECT_TYPE_FILE);
++				if (!in) {
++					/* Out of memory */
++					alloc_failed = 1;
++				}
++
++				if (in &&
++				    in->variant_type == YAFFS_OBJECT_TYPE_FILE
++				    && chunkBase < in->variant.file_variant.shrink_size) {
++					/* This has not been invalidated by a resize */
++					if (!yaffs_put_chunk_in_file(in, tags.chunk_id, chunk, -1)) {
++						alloc_failed = 1;
++					}
++
++					/* File size is calculated by looking at the data chunks if we have not
++					 * seen an object header yet. Stop this practice once we find an object header.
++					 */
++					endpos = chunkBase + tags.n_bytes;
++
++					if (!in->valid &&	/* have not got an object header yet */
++					    in->variant.file_variant.scanned_size < endpos) {
++						in->variant.file_variant.scanned_size = endpos;
++						in->variant.file_variant.file_size = endpos;
++					}
++
++				} else if (in) {
++					/* This chunk has been invalidated by a resize, or a past file deletion
++					 * so delete the chunk*/
++					yaffs_chunk_del(dev, chunk, 1, __LINE__);
++
++				}
++			} else {
++				/* chunk_id == 0, so it is an ObjectHeader.
++				 * Thus, we read in the object header and make the object
++				 */
++				foundChunksInBlock = 1;
++
++				yaffs_set_chunk_bit(dev, blk, c);
++				bi->pages_in_use++;
++
++				oh = NULL;
++				in = NULL;
++
++				if (tags.extra_available) {
++					in = yaffs_find_or_create_by_number(dev,
++						tags.obj_id,
++						tags.extra_obj_type);
++					if (!in)
++						alloc_failed = 1;
++				}
++
++				if (!in ||
++				    (!in->valid && dev->param.disable_lazy_load) ||
++				    tags.extra_shadows ||
++				    (!in->valid &&
++				    (tags.obj_id == YAFFS_OBJECTID_ROOT ||
++				     tags.obj_id == YAFFS_OBJECTID_LOSTNFOUND))) {
++
++					/* If we don't have  valid info then we need to read the chunk
++					 * TODO In future we can probably defer reading the chunk and
++					 * living with invalid data until needed.
++					 */
++
++					result = yaffs_rd_chunk_tags_nand(dev,
++									chunk,
++									chunkData,
++									NULL);
++
++					oh = (yaffs_obj_header *) chunkData;
++
++					if (dev->param.inband_tags) {
++						/* Fix up the header if they got corrupted by inband tags */
++						oh->shadows_obj = oh->inband_shadowed_obj_id;
++						oh->is_shrink = oh->inband_is_shrink;
++					}
++
++					if (!in) {
++						in = yaffs_find_or_create_by_number(dev, tags.obj_id, oh->type);
++						if (!in)
++							alloc_failed = 1;
++					}
++
++				}
++
++				if (!in) {
++					/* TODO Hoosterman we have a problem! */
++					T(YAFFS_TRACE_ERROR,
++					  (TSTR
++					   ("yaffs tragedy: Could not make object for object  %d at chunk %d during scan"
++					    TENDSTR), tags.obj_id, chunk));
++					continue;
++				}
++
++				if (in->valid) {
++					/* We have already filled this one.
++					 * We have a duplicate that will be discarded, but
++					 * we first have to suck out resize info if it is a file.
++					 */
++
++					if ((in->variant_type == YAFFS_OBJECT_TYPE_FILE) &&
++					     ((oh &&
++					       oh->type == YAFFS_OBJECT_TYPE_FILE) ||
++					      (tags.extra_available  &&
++					       tags.extra_obj_type == YAFFS_OBJECT_TYPE_FILE))) {
++						__u32 thisSize =
++						    (oh) ? oh->file_size : tags.
++						    extra_length;
++						__u32 parent_obj_id =
++						    (oh) ? oh->
++						    parent_obj_id : tags.
++						    extra_parent_id;
++
++
++						is_shrink =
++						    (oh) ? oh->is_shrink : tags.
++						    extra_is_shrink;
++
++						/* If it is deleted (unlinked at start also means deleted)
++						 * we treat the file size as being zeroed at this point.
++						 */
++						if (parent_obj_id ==
++						    YAFFS_OBJECTID_DELETED
++						    || parent_obj_id ==
++						    YAFFS_OBJECTID_UNLINKED) {
++							thisSize = 0;
++							is_shrink = 1;
++						}
++
++						if (is_shrink && in->variant.file_variant.shrink_size > thisSize)
++							in->variant.file_variant.shrink_size = thisSize;
++
++						if (is_shrink)
++							bi->has_shrink_hdr = 1;
++
++					}
++					/* Use existing - destroy this one. */
++					yaffs_chunk_del(dev, chunk, 1, __LINE__);
++
++				}
++
++				if (!in->valid && in->variant_type !=
++				    (oh ? oh->type : tags.extra_obj_type))
++					T(YAFFS_TRACE_ERROR, (
++						TSTR("yaffs tragedy: Bad object type, "
++					    TCONT("%d != %d, for object %d at chunk ")
++					    TCONT("%d during scan")
++						TENDSTR), oh ?
++					    oh->type : tags.extra_obj_type,
++					    in->variant_type, tags.obj_id,
++					    chunk));
++
++				if (!in->valid &&
++				    (tags.obj_id == YAFFS_OBJECTID_ROOT ||
++				     tags.obj_id ==
++				     YAFFS_OBJECTID_LOSTNFOUND)) {
++					/* We only load some info, don't fiddle with directory structure */
++					in->valid = 1;
++
++					if (oh) {
++
++						in->yst_mode = oh->yst_mode;
++#ifdef CONFIG_YAFFS_WINCE
++						in->win_atime[0] = oh->win_atime[0];
++						in->win_ctime[0] = oh->win_ctime[0];
++						in->win_mtime[0] = oh->win_mtime[0];
++						in->win_atime[1] = oh->win_atime[1];
++						in->win_ctime[1] = oh->win_ctime[1];
++						in->win_mtime[1] = oh->win_mtime[1];
++#else
++						in->yst_uid = oh->yst_uid;
++						in->yst_gid = oh->yst_gid;
++						in->yst_atime = oh->yst_atime;
++						in->yst_mtime = oh->yst_mtime;
++						in->yst_ctime = oh->yst_ctime;
++						in->yst_rdev = oh->yst_rdev;
++
++						in->lazy_loaded = 0;
++
++#endif
++					} else
++						in->lazy_loaded = 1;
++
++					in->hdr_chunk = chunk;
++
++				} else if (!in->valid) {
++					/* we need to load this info */
++
++					in->valid = 1;
++					in->hdr_chunk = chunk;
++
++					if (oh) {
++						in->variant_type = oh->type;
++
++						in->yst_mode = oh->yst_mode;
++#ifdef CONFIG_YAFFS_WINCE
++						in->win_atime[0] = oh->win_atime[0];
++						in->win_ctime[0] = oh->win_ctime[0];
++						in->win_mtime[0] = oh->win_mtime[0];
++						in->win_atime[1] = oh->win_atime[1];
++						in->win_ctime[1] = oh->win_ctime[1];
++						in->win_mtime[1] = oh->win_mtime[1];
++#else
++						in->yst_uid = oh->yst_uid;
++						in->yst_gid = oh->yst_gid;
++						in->yst_atime = oh->yst_atime;
++						in->yst_mtime = oh->yst_mtime;
++						in->yst_ctime = oh->yst_ctime;
++						in->yst_rdev = oh->yst_rdev;
++#endif
++
++						if (oh->shadows_obj > 0)
++							yaffs_handle_shadowed_obj(dev,
++									   oh->
++									   shadows_obj,
++									   1);
++							
++
++
++						yaffs_set_obj_name_from_oh(in, oh);
++						parent =
++						    yaffs_find_or_create_by_number
++							(dev, oh->parent_obj_id,
++							 YAFFS_OBJECT_TYPE_DIRECTORY);
++
++						 file_size = oh->file_size;
++						 is_shrink = oh->is_shrink;
++						 equiv_id = oh->equiv_id;
++
++					} else {
++						in->variant_type = tags.extra_obj_type;
++						parent =
++						    yaffs_find_or_create_by_number
++							(dev, tags.extra_parent_id,
++							 YAFFS_OBJECT_TYPE_DIRECTORY);
++						 file_size = tags.extra_length;
++						 is_shrink = tags.extra_is_shrink;
++						 equiv_id = tags.extra_equiv_id;
++						in->lazy_loaded = 1;
++
++					}
++					in->dirty = 0;
++
++					if (!parent)
++						alloc_failed = 1;
++
++					/* directory stuff...
++					 * hook up to parent
++					 */
++
++					if (parent && parent->variant_type ==
++					    YAFFS_OBJECT_TYPE_UNKNOWN) {
++						/* Set up as a directory */
++						parent->variant_type =
++							YAFFS_OBJECT_TYPE_DIRECTORY;
++						YINIT_LIST_HEAD(&parent->variant.
++							dir_variant.
++							children);
++					} else if (!parent || parent->variant_type !=
++						   YAFFS_OBJECT_TYPE_DIRECTORY) {
++						/* Hoosterman, another problem....
++						 * We're trying to use a non-directory as a directory
++						 */
++
++						T(YAFFS_TRACE_ERROR,
++						  (TSTR
++						   ("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
++						    TENDSTR)));
++						parent = dev->lost_n_found;
++					}
++
++					yaffs_add_obj_to_dir(parent, in);
++
++					itsUnlinked = (parent == dev->del_dir) ||
++						      (parent == dev->unlinked_dir);
++
++					if (is_shrink) {
++						/* Mark the block as having a shrinkHeader */
++						bi->has_shrink_hdr = 1;
++					}
++
++					/* Note re hardlinks.
++					 * Since we might scan a hardlink before its equivalent object is scanned
++					 * we put them all in a list.
++					 * After scanning is complete, we should have all the objects, so we run
++					 * through this list and fix up all the chains.
++					 */
++
++					switch (in->variant_type) {
++					case YAFFS_OBJECT_TYPE_UNKNOWN:
++						/* Todo got a problem */
++						break;
++					case YAFFS_OBJECT_TYPE_FILE:
++
++						if (in->variant.file_variant.
++						    scanned_size < file_size) {
++							/* This covers the case where the file size is greater
++							 * than where the data is
++							 * This will happen if the file is resized to be larger
++							 * than its current data extents.
++							 */
++							in->variant.file_variant.file_size = file_size;
++							in->variant.file_variant.scanned_size = file_size;
++						}
++
++						if (in->variant.file_variant.shrink_size > file_size)
++							in->variant.file_variant.shrink_size = file_size;
++				
++
++						break;
++					case YAFFS_OBJECT_TYPE_HARDLINK:
++						if (!itsUnlinked) {
++							in->variant.hardlink_variant.equiv_id =
++								equiv_id;
++							in->hard_links.next =
++								(struct ylist_head *) hard_list;
++							hard_list = in;
++						}
++						break;
++					case YAFFS_OBJECT_TYPE_DIRECTORY:
++						/* Do nothing */
++						break;
++					case YAFFS_OBJECT_TYPE_SPECIAL:
++						/* Do nothing */
++						break;
++					case YAFFS_OBJECT_TYPE_SYMLINK:
++						if (oh) {
++							in->variant.symlink_variant.alias =
++								yaffs_clone_str(oh->alias);
++							if (!in->variant.symlink_variant.alias)
++								alloc_failed = 1;
++						}
++						break;
++					}
++
++				}
++
++			}
++
++		} /* End of scanning for each chunk */
++
++		if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
++			/* If we got this far while scanning, then the block is fully allocated. */
++			state = YAFFS_BLOCK_STATE_FULL;
++		}
++
++
++		bi->block_state = state;
++
++		/* Now let's see if it was dirty */
++		if (bi->pages_in_use == 0 &&
++		    !bi->has_shrink_hdr &&
++		    bi->block_state == YAFFS_BLOCK_STATE_FULL) {
++			yaffs_block_became_dirty(dev, blk);
++		}
++
++	}
++	
++	yaffs_skip_rest_of_block(dev);
++
++	if (altBlockIndex)
++		YFREE_ALT(blockIndex);
++	else
++		YFREE(blockIndex);
++
++	/* Ok, we've done all the scanning.
++	 * Fix up the hard link chains.
++	 * We should now have scanned all the objects, now it's time to add these
++	 * hardlinks.
++	 */
++	yaffs_link_fixup(dev, hard_list);
++
++
++	yaffs_release_temp_buffer(dev, chunkData, __LINE__);
++
++	if (alloc_failed)
++		return YAFFS_FAIL;
++
++	T(YAFFS_TRACE_SCAN, (TSTR("yaffs2_scan_backwards ends" TENDSTR)));
++
++	return YAFFS_OK;
++}
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yaffs_yaffs2.h linux-2.6.36-rc8.new/fs/yaffs2/yaffs_yaffs2.h
+--- linux-2.6.36-rc8/fs/yaffs2/yaffs_yaffs2.h	1970-01-01 02:00:00.000000000 +0200
++++ linux-2.6.36-rc8.new/fs/yaffs2/yaffs_yaffs2.h	2010-10-20 13:28:16.067000294 +0300
+@@ -0,0 +1,36 @@
++/*
++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2010 Aleph One Ltd.
++ *   for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ */
++
++#ifndef __YAFFS_YAFFS2_H__
++#define __YAFFS_YAFFS2_H__
++
++#include "yaffs_guts.h"
++
++void yaffs_calc_oldest_dirty_seq(yaffs_dev_t *dev);
++void yaffs2_find_oldest_dirty_seq(yaffs_dev_t *dev);
++void yaffs2_clear_oldest_dirty_seq(yaffs_dev_t *dev, yaffs_block_info_t *bi);
++void yaffs2_update_oldest_dirty_seq(yaffs_dev_t *dev, unsigned block_no, yaffs_block_info_t *bi);
++int yaffs_block_ok_for_gc(yaffs_dev_t *dev, yaffs_block_info_t *bi);
++__u32 yaffs2_find_refresh_block(yaffs_dev_t *dev);
++int yaffs2_checkpt_required(yaffs_dev_t *dev);
++int yaffs_calc_checkpt_blocks_required(yaffs_dev_t *dev);
++
++
++void yaffs2_checkpt_invalidate(yaffs_dev_t *dev);
++int yaffs2_checkpt_save(yaffs_dev_t *dev);
++int yaffs2_checkpt_restore(yaffs_dev_t *dev);
++
++int yaffs2_handle_hole(yaffs_obj_t *obj, loff_t new_size);
++int yaffs2_scan_backwards(yaffs_dev_t *dev);
++
++#endif
+diff -Nrup linux-2.6.36-rc8/fs/yaffs2/yportenv.h linux-2.6.36-rc8.new/fs/yaffs2/yportenv.h
+--- linux-2.6.36-rc8/fs/yaffs2/yportenv.h	2010-10-20 13:17:58.988000294 +0300
++++ linux-2.6.36-rc8.new/fs/yaffs2/yportenv.h	2010-10-20 13:28:16.067000294 +0300
+@@ -1,7 +1,7 @@
+ /*
+  * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+  *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+  *   for Toby Churchill Ltd and Brightstar Engineering
+  *
+  * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -41,12 +41,14 @@
+ #if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
+ #include <linux/config.h>
+ #endif
++
+ #include <linux/kernel.h>
+ #include <linux/mm.h>
+ #include <linux/sched.h>
+ #include <linux/string.h>
+ #include <linux/slab.h>
+ #include <linux/vmalloc.h>
++#include <linux/xattr.h>
+ 
+ #define YCHAR char
+ #define YUCHAR unsigned char
+@@ -55,11 +57,11 @@
+ #define yaffs_strcpy(a, b)     strcpy(a, b)
+ #define yaffs_strncpy(a, b, c) strncpy(a, b, c)
+ #define yaffs_strncmp(a, b, c) strncmp(a, b, c)
+-#define yaffs_strlen(s)	       strlen(s)
++#define yaffs_strnlen(s,m)	strnlen(s,m)
+ #define yaffs_sprintf	       sprintf
+ #define yaffs_toupper(a)       toupper(a)
+ 
+-#define Y_INLINE inline
++#define Y_INLINE __inline__
+ 
+ #define YAFFS_LOSTNFOUND_NAME		"lost+found"
+ #define YAFFS_LOSTNFOUND_PREFIX		"obj"
+@@ -71,11 +73,11 @@
+ #define YFREE_ALT(x)   vfree(x)
+ #define YMALLOC_DMA(x) YMALLOC(x)
+ 
+-/* KR - added for use in scan so processes aren't blocked indefinitely. */
+ #define YYIELD() schedule()
++#define Y_DUMP_STACK() dump_stack()
+ 
+-#define YAFFS_ROOT_MODE			0666
+-#define YAFFS_LOSTNFOUND_MODE		0666
++#define YAFFS_ROOT_MODE			0755
++#define YAFFS_LOSTNFOUND_MODE		0700
+ 
+ #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+ #define Y_CURRENT_TIME CURRENT_TIME.tv_sec
+@@ -85,19 +87,14 @@
+ #define Y_TIME_CONVERT(x) (x)
+ #endif
+ 
+-#define yaffs_SumCompare(x, y) ((x) == (y))
++#define yaffs_sum_cmp(x, y) ((x) == (y))
+ #define yaffs_strcmp(a, b) strcmp(a, b)
+ 
+ #define TENDSTR "\n"
+-#define TSTR(x) KERN_WARNING x
++#define TSTR(x) KERN_DEBUG x
+ #define TCONT(x) x
+ #define TOUT(p) printk p
+ 
+-#define yaffs_trace(mask, fmt, args...) \
+-	do { if ((mask) & (yaffs_traceMask|YAFFS_TRACE_ERROR)) \
+-		printk(KERN_WARNING "yaffs: " fmt, ## args); \
+-	} while (0)
+-
+ #define compile_time_assertion(assertion) \
+ 	({ int x = __builtin_choose_expr(assertion, 0, (void)0); (void) x; })
+ 
+@@ -116,7 +113,6 @@
+ #include "stdio.h"
+ #include "string.h"
+ 
+-#include "devextras.h"
+ 
+ #define YMALLOC(x) malloc(x)
+ #define YFREE(x)   free(x)
+@@ -129,7 +125,7 @@
+ #define yaffs_strcat(a, b)     strcat(a, b)
+ #define yaffs_strcpy(a, b)     strcpy(a, b)
+ #define yaffs_strncpy(a, b, c) strncpy(a, b, c)
+-#define yaffs_strlen(s)	       strlen(s)
++#define yaffs_strnlen(s,m)	       strnlen(s,m)
+ #define yaffs_sprintf	       sprintf
+ #define yaffs_toupper(a)       toupper(a)
+ 
+@@ -146,10 +142,10 @@
+ #define YAFFS_LOSTNFOUND_PREFIX		"obj"
+ /* #define YPRINTF(x) printf x */
+ 
+-#define YAFFS_ROOT_MODE				0666
+-#define YAFFS_LOSTNFOUND_MODE		0666
++#define YAFFS_ROOT_MODE			0755
++#define YAFFS_LOSTNFOUND_MODE		0700
+ 
+-#define yaffs_SumCompare(x, y) ((x) == (y))
++#define yaffs_sum_cmp(x, y) ((x) == (y))
+ #define yaffs_strcmp(a, b) strcmp(a, b)
+ 
+ #else
+@@ -158,46 +154,180 @@
+ 
+ #endif
+ 
+-/* see yaffs_fs.c */
+-extern unsigned int yaffs_traceMask;
+-extern unsigned int yaffs_wr_attempts;
++#if defined(CONFIG_YAFFS_DIRECT) || defined(CONFIG_YAFFS_WINCE)
+ 
+-/*
+- * Tracing flags.
+- * The flags masked in YAFFS_TRACE_ALWAYS are always traced.
+- */
++#ifdef CONFIG_YAFFSFS_PROVIDE_VALUES
++
++#ifndef O_RDONLY
++#define O_RDONLY        00
++#endif
++
++#ifndef O_WRONLY
++#define O_WRONLY	01
++#endif
++
++#ifndef O_RDWR
++#define O_RDWR		02
++#endif
++
++#ifndef O_CREAT		
++#define O_CREAT 	0100
++#endif
++
++#ifndef O_EXCL
++#define O_EXCL		0200
++#endif
++
++#ifndef O_TRUNC
++#define O_TRUNC		01000
++#endif
++
++#ifndef O_APPEND
++#define O_APPEND	02000
++#endif
++
++#ifndef SEEK_SET
++#define SEEK_SET	0
++#endif
++
++#ifndef SEEK_CUR
++#define SEEK_CUR	1
++#endif
++
++#ifndef SEEK_END
++#define SEEK_END	2
++#endif
++
++#ifndef EBUSY
++#define EBUSY	16
++#endif
++
++#ifndef ENODEV
++#define ENODEV	19
++#endif
++
++#ifndef EINVAL
++#define EINVAL	22
++#endif
++
++#ifndef EBADF
++#define EBADF	9
++#endif
++
++#ifndef EACCES
++#define EACCES	13
++#endif
++
++#ifndef EXDEV	
++#define EXDEV	18
++#endif
++
++#ifndef ENOENT
++#define ENOENT	2
++#endif
++
++#ifndef ENOSPC
++#define ENOSPC	28
++#endif
++
++#ifndef ERANGE
++#define ERANGE 34
++#endif
++
++#ifndef ENODATA
++#define ENODATA 61
++#endif
++
++#ifndef ENOTEMPTY
++#define ENOTEMPTY 39
++#endif
++
++#ifndef ENAMETOOLONG
++#define ENAMETOOLONG 36
++#endif
++
++#ifndef ENOMEM
++#define ENOMEM 12
++#endif
++
++#ifndef EEXIST
++#define EEXIST 17
++#endif
++
++#ifndef ENOTDIR
++#define ENOTDIR 20
++#endif
++
++#ifndef EISDIR
++#define EISDIR 21
++#endif
++
++
++// Mode flags
++
++#ifndef S_IFMT
++#define S_IFMT		0170000
++#endif
++
++#ifndef S_IFLNK
++#define S_IFLNK		0120000
++#endif
+ 
+-#define YAFFS_TRACE_OS			0x00000002
+-#define YAFFS_TRACE_ALLOCATE		0x00000004
+-#define YAFFS_TRACE_SCAN		0x00000008
+-#define YAFFS_TRACE_BAD_BLOCKS		0x00000010
+-#define YAFFS_TRACE_ERASE		0x00000020
+-#define YAFFS_TRACE_GC			0x00000040
+-#define YAFFS_TRACE_WRITE		0x00000080
+-#define YAFFS_TRACE_TRACING		0x00000100
+-#define YAFFS_TRACE_DELETION		0x00000200
+-#define YAFFS_TRACE_BUFFERS		0x00000400
+-#define YAFFS_TRACE_NANDACCESS		0x00000800
+-#define YAFFS_TRACE_GC_DETAIL		0x00001000
+-#define YAFFS_TRACE_SCAN_DEBUG		0x00002000
+-#define YAFFS_TRACE_MTD			0x00004000
+-#define YAFFS_TRACE_CHECKPOINT		0x00008000
+-
+-#define YAFFS_TRACE_VERIFY		0x00010000
+-#define YAFFS_TRACE_VERIFY_NAND		0x00020000
+-#define YAFFS_TRACE_VERIFY_FULL		0x00040000
+-#define YAFFS_TRACE_VERIFY_ALL		0x000F0000
+-
+-
+-#define YAFFS_TRACE_ERROR		0x40000000
+-#define YAFFS_TRACE_BUG			0x80000000
+-#define YAFFS_TRACE_ALWAYS		0xF0000000
++#ifndef S_IFDIR
++#define S_IFDIR		0040000
++#endif
++
++#ifndef S_IFREG
++#define S_IFREG		0100000
++#endif
+ 
++#ifndef S_IREAD 
++#define S_IREAD		0000400
++#endif
++
++#ifndef S_IWRITE
++#define	S_IWRITE	0000200
++#endif
+ 
+-#define T(mask, p) do { if ((mask) & (yaffs_traceMask | YAFFS_TRACE_ALWAYS)) TOUT(p); } while (0)
++#ifndef S_IEXEC
++#define	S_IEXEC	0000100
++#endif
++
++#ifndef XATTR_CREATE
++#define XATTR_CREATE 1
++#endif
++
++#ifndef XATTR_REPLACE
++#define XATTR_REPLACE 2
++#endif
++
++#ifndef R_OK
++#define R_OK	4
++#define W_OK	2
++#define X_OK	1
++#define F_OK	0
++#endif
++
++#else
++#include <errno.h>
++#include <sys/stat.h>
++#include <fcntl.h>
++#endif
++
++#endif
++
++#ifndef Y_DUMP_STACK
++#define Y_DUMP_STACK() do { } while (0)
++#endif
+ 
+ #ifndef YBUG
+-#define YBUG() do {T(YAFFS_TRACE_BUG, (TSTR("==>> yaffs bug: " __FILE__ " %d" TENDSTR), __LINE__)); } while (0)
++#define YBUG() do {\
++	T(YAFFS_TRACE_BUG,\
++		(TSTR("==>> yaffs bug: " __FILE__ " %d" TENDSTR),\
++		__LINE__));\
++	Y_DUMP_STACK();\
++} while (0)
+ #endif
+ 
++
+ #endif