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Diffstat (limited to 'target/linux/rb532-2.6/patches/130-custom_partitions.patch')
-rw-r--r--target/linux/rb532-2.6/patches/130-custom_partitions.patch311
1 files changed, 311 insertions, 0 deletions
diff --git a/target/linux/rb532-2.6/patches/130-custom_partitions.patch b/target/linux/rb532-2.6/patches/130-custom_partitions.patch
new file mode 100644
index 0000000..e4b3327
--- /dev/null
+++ b/target/linux/rb532-2.6/patches/130-custom_partitions.patch
@@ -0,0 +1,311 @@
+diff -urN linux.old/fs/partitions/check.c linux.dev/fs/partitions/check.c
+--- linux.old/fs/partitions/check.c 2006-05-31 02:31:44.000000000 +0200
++++ linux.dev/fs/partitions/check.c 2006-06-15 01:27:17.000000000 +0200
+@@ -29,6 +29,7 @@
+ #include "ldm.h"
+ #include "mac.h"
+ #include "msdos.h"
++#include "openwrt.h"
+ #include "osf.h"
+ #include "sgi.h"
+ #include "sun.h"
+@@ -48,6 +49,9 @@
+ * Probe partition formats with tables at disk address 0
+ * that also have an ADFS boot block at 0xdc0.
+ */
++#ifdef CONFIG_OPENWRT_PARTITION
++ openwrt_partition,
++#endif
+ #ifdef CONFIG_ACORN_PARTITION_ICS
+ adfspart_check_ICS,
+ #endif
+diff -urN linux.old/fs/partitions/Kconfig linux.dev/fs/partitions/Kconfig
+--- linux.old/fs/partitions/Kconfig 2006-05-31 02:31:44.000000000 +0200
++++ linux.dev/fs/partitions/Kconfig 2006-06-15 01:27:17.000000000 +0200
+@@ -14,6 +14,12 @@
+
+ If unsure, say N.
+
++config OPENWRT_PARTITION
++ bool "OpenWrt partition support" if PARTITION_ADVANCED
++ default y
++ help
++ Support the custom OpenWrt partition map
++
+ config ACORN_PARTITION
+ bool "Acorn partition support" if PARTITION_ADVANCED
+ default y if ARCH_ACORN
+diff -urN linux.old/fs/partitions/Makefile linux.dev/fs/partitions/Makefile
+--- linux.old/fs/partitions/Makefile 2006-05-31 02:31:44.000000000 +0200
++++ linux.dev/fs/partitions/Makefile 2006-06-15 01:27:17.000000000 +0200
+@@ -11,6 +11,7 @@
+ obj-$(CONFIG_MAC_PARTITION) += mac.o
+ obj-$(CONFIG_LDM_PARTITION) += ldm.o
+ obj-$(CONFIG_MSDOS_PARTITION) += msdos.o
++obj-$(CONFIG_OPENWRT_PARTITION) += openwrt.o
+ obj-$(CONFIG_OSF_PARTITION) += osf.o
+ obj-$(CONFIG_SGI_PARTITION) += sgi.o
+ obj-$(CONFIG_SUN_PARTITION) += sun.o
+diff -urN linux.old/fs/partitions/openwrt.c linux.dev/fs/partitions/openwrt.c
+--- linux.old/fs/partitions/openwrt.c 1970-01-01 01:00:00.000000000 +0100
++++ linux.dev/fs/partitions/openwrt.c 2006-06-15 01:27:17.000000000 +0200
+@@ -0,0 +1,249 @@
++/*
++ * fs/partitions/openwrt.c
++ *
++ * Code extracted from drivers/block/genhd.c
++ * and fs/partitions/msdos.c
++ *
++ * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
++ * Copyright (C) 1991-1998 Linus Torvalds
++ *
++ * Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
++ * in the early extended-partition checks and added DM partitions
++ *
++ * Support for DiskManager v6.0x added by Mark Lord,
++ * with information provided by OnTrack. This now works for linux fdisk
++ * and LILO, as well as loadlin and bootln. Note that disks other than
++ * /dev/hda *must* have a "DOS" type 0x51 partition in the first slot (hda1).
++ *
++ * More flexible handling of extended partitions - aeb, 950831
++ *
++ * Check partition table on IDE disks for common CHS translations
++ *
++ * Re-organised Feb 1998 Russell King
++ */
++
++#include <linux/config.h>
++
++#include "check.h"
++#include "openwrt.h"
++
++/*
++ * Many architectures don't like unaligned accesses, while
++ * the nr_sects and start_sect partition table entries are
++ * at a 2 (mod 4) address.
++ */
++#include <asm/unaligned.h>
++
++#define SYS_IND(p) (get_unaligned(&p->sys_ind))
++#define NR_SECTS(p) ({ __typeof__(p->nr_sects) __a = \
++ get_unaligned(&p->nr_sects); \
++ le32_to_cpu(__a); \
++ })
++
++#define START_SECT(p) ({ __typeof__(p->start_sect) __a = \
++ get_unaligned(&p->start_sect); \
++ le32_to_cpu(__a); \
++ })
++
++static inline int is_extended_partition(struct partition *p)
++{
++ return (SYS_IND(p) == DOS_EXTENDED_PARTITION ||
++ SYS_IND(p) == WIN98_EXTENDED_PARTITION ||
++ SYS_IND(p) == LINUX_EXTENDED_PARTITION);
++}
++
++#define MSDOS_LABEL_MAGIC1 0x55
++#define MSDOS_LABEL_MAGIC2 0xAA
++
++static inline int
++msdos_magic_present(unsigned char *p)
++{
++ return (p[0] == MSDOS_LABEL_MAGIC1 && p[1] == MSDOS_LABEL_MAGIC2);
++}
++
++static inline int
++openwrt_magic_present(unsigned char *p)
++{
++ return (p[0] == 'O' &&
++ p[1] == 'W' &&
++ p[2] == 'R' &&
++ p[3] == 'T');
++}
++
++/*
++ * Create devices for each logical partition in an extended partition.
++ * The logical partitions form a linked list, with each entry being
++ * a partition table with two entries. The first entry
++ * is the real data partition (with a start relative to the partition
++ * table start). The second is a pointer to the next logical partition
++ * (with a start relative to the entire extended partition).
++ * We do not create a Linux partition for the partition tables, but
++ * only for the actual data partitions.
++ */
++
++static void
++parse_extended(struct parsed_partitions *state, struct block_device *bdev,
++ u32 first_sector, u32 first_size)
++{
++ struct partition *p;
++ Sector sect;
++ unsigned char *data;
++ u32 this_sector, this_size;
++ int sector_size = bdev_hardsect_size(bdev) / 512;
++ int loopct = 0; /* number of links followed
++ without finding a data partition */
++ int i;
++
++ this_sector = first_sector;
++ this_size = first_size;
++
++ while (1) {
++ if (++loopct > 100)
++ return;
++ if (state->next == state->limit)
++ return;
++ data = read_dev_sector(bdev, this_sector, &sect);
++ if (!data)
++ return;
++
++ if (!msdos_magic_present(data + 510))
++ goto done;
++
++ p = (struct partition *) (data + 0x1be);
++
++ /*
++ * Usually, the first entry is the real data partition,
++ * the 2nd entry is the next extended partition, or empty,
++ * and the 3rd and 4th entries are unused.
++ * However, DRDOS sometimes has the extended partition as
++ * the first entry (when the data partition is empty),
++ * and OS/2 seems to use all four entries.
++ */
++
++ /*
++ * First process the data partition(s)
++ */
++ for (i=0; i<4; i++, p++) {
++ u32 offs, size, next;
++ if (!NR_SECTS(p) || is_extended_partition(p))
++ continue;
++
++ /* Check the 3rd and 4th entries -
++ these sometimes contain random garbage */
++ offs = START_SECT(p)*sector_size;
++ size = NR_SECTS(p)*sector_size;
++ next = this_sector + offs;
++ if (i >= 2) {
++ if (offs + size > this_size)
++ continue;
++ if (next < first_sector)
++ continue;
++ if (next + size > first_sector + first_size)
++ continue;
++ }
++
++ put_partition(state, state->next, next, size);
++ if (SYS_IND(p) == LINUX_RAID_PARTITION)
++ state->parts[state->next].flags = 1;
++ loopct = 0;
++ if (++state->next == state->limit)
++ goto done;
++ }
++ /*
++ * Next, process the (first) extended partition, if present.
++ * (So far, there seems to be no reason to make
++ * parse_extended() recursive and allow a tree
++ * of extended partitions.)
++ * It should be a link to the next logical partition.
++ */
++ p -= 4;
++ for (i=0; i<4; i++, p++)
++ if (NR_SECTS(p) && is_extended_partition(p))
++ break;
++ if (i == 4)
++ goto done; /* nothing left to do */
++
++ this_sector = first_sector + START_SECT(p) * sector_size;
++ this_size = NR_SECTS(p) * sector_size;
++ put_dev_sector(sect);
++ }
++done:
++ put_dev_sector(sect);
++}
++
++
++int openwrt_partition(struct parsed_partitions *state, struct block_device *bdev)
++{
++ int sector_size = bdev_hardsect_size(bdev) / 512;
++ Sector sect;
++ unsigned char *data;
++ struct partition *p;
++ int slot;
++ u32 last_block = 0;
++ u32 size = 0;
++ int firstfree = 5;
++
++ data = read_dev_sector(bdev, 0, &sect);
++ if (!data)
++ return -1;
++ if (!openwrt_magic_present(data)) {
++ printk("No OpenWrt partition table detected\n");
++ put_dev_sector(sect);
++ return 0;
++ }
++
++ /*
++ * Now that the 55aa signature is present, this is probably
++ * either the boot sector of a FAT filesystem or a DOS-type
++ * partition table. Reject this in case the boot indicator
++ * is not 0 or 0x80.
++ */
++ p = (struct partition *) (data + 0x1be);
++ for (slot = 1; slot <= 4; slot++, p++) {
++ if (p->boot_ind != 0 && p->boot_ind != 0x80) {
++ put_dev_sector(sect);
++ return 0;
++ }
++ }
++
++ p = (struct partition *) (data + 0x1be);
++
++ /*
++ * Look for partitions in two passes:
++ * First find the primary and DOS-type extended partitions.
++ */
++
++ state->next = 6;
++ for (slot = 1 ; slot <= 4 ; slot++, p++) {
++ u32 start = START_SECT(p)*sector_size;
++ size = NR_SECTS(p)*sector_size;
++ if (!size) {
++ if (firstfree > slot)
++ firstfree = slot;
++
++ continue;
++ }
++ if (is_extended_partition(p)) {
++ /* prevent someone doing mkfs or mkswap on an
++ extended partition, but leave room for LILO */
++ last_block = start + size;
++ put_partition(state, slot, start, size == 1 ? 1 : 2);
++ printk(" <");
++ parse_extended(state, bdev, start, size);
++ printk(" >");
++ continue;
++ }
++ if ((start + size) > get_capacity(bdev->bd_disk))
++ size = get_capacity(bdev->bd_disk) - start;
++ last_block = start + size;
++ put_partition(state, slot, start, size);
++ }
++ if (last_block + 1024 < (size = get_capacity(bdev->bd_disk)))
++ put_partition(state, firstfree, last_block, size - last_block);
++
++ printk("\n");
++
++ put_dev_sector(sect);
++ return 1;
++}
++
+diff -urN linux.old/fs/partitions/openwrt.h linux.dev/fs/partitions/openwrt.h
+--- linux.old/fs/partitions/openwrt.h 1970-01-01 01:00:00.000000000 +0100
++++ linux.dev/fs/partitions/openwrt.h 2006-06-15 01:27:17.000000000 +0200
+@@ -0,0 +1,6 @@
++/*
++ * fs/partitions/openwrt.h
++ */
++
++int openwrt_partition(struct parsed_partitions *state, struct block_device *bdev);
++