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| author | Phillip Lougher <phillip@lougher.demon.co.uk> | 2010-05-14 21:48:47 +0200 |
|---|---|---|
| committer | Phillip Lougher <phillip@lougher.demon.co.uk> | 2010-05-17 20:54:05 +0200 |
| commit | 4b5397dc24ab12afaac85be3d0863b7f6eb8b0f0 (patch) | |
| tree | bd385be428cfefcdf520f19c532196df1202d687 /fs/squashfs/squashfs_fs.h | |
| parent | Linux 2.6.34-rc7 (diff) | |
| download | linux-4b5397dc24ab12afaac85be3d0863b7f6eb8b0f0.tar.xz linux-4b5397dc24ab12afaac85be3d0863b7f6eb8b0f0.zip | |
squashfs: add xattr id support
This patch adds support for mapping xattr ids (stored in inodes)
into the on-disk location of the xattrs themselves.
Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
Diffstat (limited to 'fs/squashfs/squashfs_fs.h')
| -rw-r--r-- | fs/squashfs/squashfs_fs.h | 32 |
1 files changed, 31 insertions, 1 deletions
diff --git a/fs/squashfs/squashfs_fs.h b/fs/squashfs/squashfs_fs.h index 79024245ea00..c654e863d3c0 100644 --- a/fs/squashfs/squashfs_fs.h +++ b/fs/squashfs/squashfs_fs.h @@ -174,6 +174,24 @@ #define SQUASHFS_ID_BLOCK_BYTES(A) (SQUASHFS_ID_BLOCKS(A) *\ sizeof(u64)) +/* xattr id lookup table defines */ +#define SQUASHFS_XATTR_BYTES(A) ((A) * sizeof(struct squashfs_xattr_id)) + +#define SQUASHFS_XATTR_BLOCK(A) (SQUASHFS_XATTR_BYTES(A) / \ + SQUASHFS_METADATA_SIZE) + +#define SQUASHFS_XATTR_BLOCK_OFFSET(A) (SQUASHFS_XATTR_BYTES(A) % \ + SQUASHFS_METADATA_SIZE) + +#define SQUASHFS_XATTR_BLOCKS(A) ((SQUASHFS_XATTR_BYTES(A) + \ + SQUASHFS_METADATA_SIZE - 1) / \ + SQUASHFS_METADATA_SIZE) + +#define SQUASHFS_XATTR_BLOCK_BYTES(A) (SQUASHFS_XATTR_BLOCKS(A) *\ + sizeof(u64)) +#define SQUASHFS_XATTR_BLK(A) ((unsigned int) ((A) >> 16)) + +#define SQUASHFS_XATTR_OFFSET(A) ((unsigned int) ((A) & 0xffff)) /* cached data constants for filesystem */ #define SQUASHFS_CACHED_BLKS 8 @@ -228,7 +246,7 @@ struct squashfs_super_block { __le64 root_inode; __le64 bytes_used; __le64 id_table_start; - __le64 xattr_table_start; + __le64 xattr_id_table_start; __le64 inode_table_start; __le64 directory_table_start; __le64 fragment_table_start; @@ -377,4 +395,16 @@ struct squashfs_fragment_entry { unsigned int unused; }; +struct squashfs_xattr_id { + __le64 xattr; + __le32 count; + __le32 size; +}; + +struct squashfs_xattr_id_table { + __le64 xattr_table_start; + __le32 xattr_ids; + __le32 unused; +}; + #endif |