add generic patchset levelled up to 2.6.31-rc6

SVN-Revision: 17351

1 files changed, 214 insertions, 0 deletions

diff --git a/target/linux/generic-2.6/patches-2.6.31/053-squashfs_lzma.patch b/target/linux/generic-2.6/patches-2.6.31/053-squashfs_lzma.patch
new file mode 100644
index 0000000..c07239b
--- /dev/null
+++ b/target/linux/generic-2.6/patches-2.6.31/053-squashfs_lzma.patch
@@ -0,0 +1,214 @@
+--- a/fs/squashfs/Kconfig
++++ b/fs/squashfs/Kconfig
+@@ -2,7 +2,6 @@ config SQUASHFS
+ 	tristate "SquashFS 4.0 - Squashed file system support"
+ 	depends on BLOCK
+ 	select CRYPTO
+-	select CRYPTO_ZLIB
+ 	help
+ 	  Saying Y here includes support for SquashFS 4.0 (a Compressed
+ 	  Read-Only File System).  Squashfs is a highly compressed read-only
+@@ -37,6 +36,26 @@ config SQUASHFS_EMBEDDED
+ 
+ 	  If unsure, say N.
+ 
++config SQUASHFS_SUPPORT_ZLIB
++	bool
++	prompt "Support ZLIB compression" if SQUASHFS_SUPPORT_LZMA
++	depends on SQUASHFS
++	select CRYPTO_ZLIB
++	default y
++	help
++	  ZLIB is the default compression used in squashfs. If you are
++	  using LZMA compression instead, you can remove support for ZLIB
++	  entirely.
++
++config SQUASHFS_SUPPORT_LZMA
++	bool "Support LZMA compression"
++	depends on SQUASHFS
++	select CRYPTO_UNLZMA
++	help
++	  By default SquashFS uses ZLIB compression, however (if your tools
++	  support it, you can use LZMA instead, which saves space.
++
++
+ config SQUASHFS_FRAGMENT_CACHE_SIZE
+ 	int "Number of fragments cached" if SQUASHFS_EMBEDDED
+ 	depends on SQUASHFS
+--- a/fs/squashfs/squashfs_fs.h
++++ b/fs/squashfs/squashfs_fs.h
+@@ -212,6 +212,7 @@ struct meta_index {
+  * definitions for structures on disk
+  */
+ #define ZLIB_COMPRESSION	 1
++#define LZMA_COMPRESSION	 2
+ 
+ struct squashfs_super_block {
+ 	__le32			s_magic;
+--- a/fs/squashfs/super.c
++++ b/fs/squashfs/super.c
+@@ -48,13 +48,65 @@
+ #include "squashfs.h"
+ 
+ 
+-#define SQUASHFS_CRYPTO_ALG	"zlib"
++static int squashfs_setup_zlib(struct squashfs_sb_info *msblk)
++{
++	int err = -EOPNOTSUPP;
++
++#ifdef CONFIG_SQUASHFS_SUPPORT_ZLIB
++	struct {
++		struct nlattr nla;
++		int val;
++	} params = {
++		.nla = {
++			.nla_len	= nla_attr_size(sizeof(int)),
++			.nla_type	= ZLIB_DECOMP_WINDOWBITS,
++		},
++		.val			= DEF_WBITS,
++	};
++
++	msblk->tfm = crypto_alloc_pcomp("zlib", 0,
++					CRYPTO_ALG_ASYNC);
++	if (IS_ERR(msblk->tfm)) {
++		ERROR("Failed to load zlib crypto module\n");
++		return PTR_ERR(msblk->tfm);
++	}
++
++	err = crypto_decompress_setup(msblk->tfm, &params, sizeof(params));
++	if (err) {
++		ERROR("Failed to set up decompression parameters\n");
++		crypto_free_pcomp(msblk->tfm);
++	}
++#endif
+ 
++	return err;
++}
++
++static int squashfs_setup_lzma(struct squashfs_sb_info *msblk)
++{
++	int err = -EOPNOTSUPP;
++
++#ifdef CONFIG_SQUASHFS_SUPPORT_LZMA
++	msblk->tfm = crypto_alloc_pcomp("lzma", 0,
++					CRYPTO_ALG_ASYNC);
++	if (IS_ERR(msblk->tfm)) {
++		ERROR("Failed to load lzma crypto module\n");
++		return PTR_ERR(msblk->tfm);
++	}
++
++	err = crypto_decompress_setup(msblk->tfm, NULL, 0);
++	if (err) {
++		ERROR("Failed to set up decompression parameters\n");
++		crypto_free_pcomp(msblk->tfm);
++	}
++#endif
++
++	return err;
++}
+ 
+ static struct file_system_type squashfs_fs_type;
+ static struct super_operations squashfs_super_ops;
+ 
+-static int supported_squashfs_filesystem(short major, short minor, short comp)
++static int supported_squashfs_filesystem(short major, short minor)
+ {
+ 	if (major < SQUASHFS_MAJOR) {
+ 		ERROR("Major/Minor mismatch, older Squashfs %d.%d "
+@@ -67,9 +119,6 @@ static int supported_squashfs_filesystem
+ 		return -EINVAL;
+ 	}
+ 
+-	if (comp != ZLIB_COMPRESSION)
+-		return -EINVAL;
+-
+ 	return 0;
+ }
+ 
+@@ -84,16 +133,6 @@ static int squashfs_fill_super(struct su
+ 	unsigned short flags;
+ 	unsigned int fragments;
+ 	u64 lookup_table_start;
+-	struct {
+-		struct nlattr nla;
+-		int val;
+-	} params = {
+-		.nla = {
+-			.nla_len	= nla_attr_size(sizeof(int)),
+-			.nla_type	= ZLIB_DECOMP_WINDOWBITS,
+-		},
+-		.val			= DEF_WBITS,
+-	};
+ 	int err;
+ 
+ 	TRACE("Entered squashfs_fill_superblock\n");
+@@ -105,21 +144,6 @@ static int squashfs_fill_super(struct su
+ 	}
+ 	msblk = sb->s_fs_info;
+ 
+-	msblk->tfm = crypto_alloc_pcomp(SQUASHFS_CRYPTO_ALG, 0,
+-					CRYPTO_ALG_ASYNC);
+-	if (IS_ERR(msblk->tfm)) {
+-		ERROR("Failed to load %s crypto module\n",
+-		      SQUASHFS_CRYPTO_ALG);
+-		err = PTR_ERR(msblk->tfm);
+-		goto failed_pcomp;
+-	}
+-
+-	err = crypto_decompress_setup(msblk->tfm, &params, sizeof(params));
+-	if (err) {
+-		ERROR("Failed to set up decompression parameters\n");
+-		goto failure;
+-	}
+-
+ 	sblk = kzalloc(sizeof(*sblk), GFP_KERNEL);
+ 	if (sblk == NULL) {
+ 		ERROR("Failed to allocate squashfs_super_block\n");
+@@ -159,8 +183,21 @@ static int squashfs_fill_super(struct su
+ 
+ 	/* Check the MAJOR & MINOR versions and compression type */
+ 	err = supported_squashfs_filesystem(le16_to_cpu(sblk->s_major),
+-			le16_to_cpu(sblk->s_minor),
+-			le16_to_cpu(sblk->compression));
++			le16_to_cpu(sblk->s_minor));
++	if (err < 0)
++		goto failed_mount;
++
++	switch(le16_to_cpu(sblk->compression)) {
++	case ZLIB_COMPRESSION:
++		err = squashfs_setup_zlib(msblk);
++		break;
++	case LZMA_COMPRESSION:
++		err = squashfs_setup_lzma(msblk);
++		break;
++	default:
++		err = -EINVAL;
++		break;
++	}
+ 	if (err < 0)
+ 		goto failed_mount;
+ 
+@@ -316,21 +353,16 @@ allocate_root:
+ 	return 0;
+ 
+ failed_mount:
++	if (msblk->tfm)
++		crypto_free_pcomp(msblk->tfm);
+ 	squashfs_cache_delete(msblk->block_cache);
+ 	squashfs_cache_delete(msblk->fragment_cache);
+ 	squashfs_cache_delete(msblk->read_page);
+ 	kfree(msblk->inode_lookup_table);
+ 	kfree(msblk->fragment_index);
+ 	kfree(msblk->id_table);
+-	crypto_free_pcomp(msblk->tfm);
+-	kfree(sb->s_fs_info);
+-	sb->s_fs_info = NULL;
+ 	kfree(sblk);
+-	return err;
+-
+ failure:
+-	crypto_free_pcomp(msblk->tfm);
+-failed_pcomp:
+ 	kfree(sb->s_fs_info);
+ 	sb->s_fs_info = NULL;
+ 	return err;