diff options
Diffstat (limited to 'target/linux/generic-2.6/patches-2.6.30/053-squashfs_lzma.patch')
| -rw-r--r-- | target/linux/generic-2.6/patches-2.6.30/053-squashfs_lzma.patch | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/target/linux/generic-2.6/patches-2.6.30/053-squashfs_lzma.patch b/target/linux/generic-2.6/patches-2.6.30/053-squashfs_lzma.patch new file mode 100644 index 0000000000..b632e05926 --- /dev/null +++ b/target/linux/generic-2.6/patches-2.6.30/053-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_LZMA ++ 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 +@@ -47,13 +47,65 @@ + #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, ¶ms, 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 " +@@ -66,9 +118,6 @@ static int supported_squashfs_filesystem + return -EINVAL; + } + +- if (comp != ZLIB_COMPRESSION) +- return -EINVAL; +- + return 0; + } + +@@ -83,16 +132,6 @@ 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"); +@@ -104,21 +143,6 @@ 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, ¶ms, 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"); +@@ -158,8 +182,21 @@ 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; + +@@ -305,21 +342,16 @@ 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; |