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authorPhillip Lougher <phillip@lougher.demon.co.uk>2010-05-14 23:48:47 +0400
committerPhillip Lougher <phillip@lougher.demon.co.uk>2010-05-17 22:54:05 +0400
commit4b5397dc24ab12afaac85be3d0863b7f6eb8b0f0 (patch)
treebd385be428cfefcdf520f19c532196df1202d687 /fs/squashfs/squashfs_fs.h
parentb57f95a38233a2e73b679bea4a5453a1cc2a1cc9 (diff)
downloadlinux-4b5397dc24ab12afaac85be3d0863b7f6eb8b0f0.tar.xz
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.h32
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