diff options
| author | Christoph Hellwig <hch@lst.de> | 2013-04-21 19:53:46 (GMT) |
|---|---|---|
| committer | Ben Myers <bpm@sgi.com> | 2013-04-21 19:53:46 (GMT) |
| commit | ee1a47ab0e77600fcbdf1c87d461bd8f3f63150d (patch) | |
| tree | 6340d9f4b8b53c0d18045da1372599645375efce /fs/xfs/xfs_ialloc_btree.h | |
| parent | a2050646f655a90400cbb66c3866d2e0137eee0c (diff) | |
| download | linux-ee1a47ab0e77600fcbdf1c87d461bd8f3f63150d.tar.xz | |
xfs: add support for large btree blocks
Add support for larger btree blocks that contains a CRC32C checksum,
a filesystem uuid and block number for detecting filesystem
consistency and out of place writes.
[dchinner@redhat.com] Also include an owner field to allow reverse
mappings to be implemented for improved repairability and a LSN
field to so that log recovery can easily determine the last
modification that made it to disk for each buffer.
[dchinner@redhat.com] Add buffer log format flags to indicate the
type of buffer to recovery so that we don't have to do blind magic
number tests to determine what the buffer is.
[dchinner@redhat.com] Modified to fit into the verifier structure.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Ben Myers <bpm@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_ialloc_btree.h')
| -rw-r--r-- | fs/xfs/xfs_ialloc_btree.h | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/fs/xfs/xfs_ialloc_btree.h b/fs/xfs/xfs_ialloc_btree.h index 25c0239..3ac36b76 100644 --- a/fs/xfs/xfs_ialloc_btree.h +++ b/fs/xfs/xfs_ialloc_btree.h @@ -29,7 +29,8 @@ struct xfs_mount; /* * There is a btree for the inode map per allocation group. */ -#define XFS_IBT_MAGIC 0x49414254 /* 'IABT' */ +#define XFS_IBT_MAGIC 0x49414254 /* 'IABT' */ +#define XFS_IBT_CRC_MAGIC 0x49414233 /* 'IAB3' */ typedef __uint64_t xfs_inofree_t; #define XFS_INODES_PER_CHUNK (NBBY * sizeof(xfs_inofree_t)) @@ -76,10 +77,10 @@ typedef __be32 xfs_inobt_ptr_t; /* * Btree block header size depends on a superblock flag. - * - * (not quite yet, but soon) */ -#define XFS_INOBT_BLOCK_LEN(mp) XFS_BTREE_SBLOCK_LEN +#define XFS_INOBT_BLOCK_LEN(mp) \ + (xfs_sb_version_hascrc(&((mp)->m_sb)) ? \ + XFS_BTREE_SBLOCK_CRC_LEN : XFS_BTREE_SBLOCK_LEN) /* * Record, key, and pointer address macros for btree blocks. |