diff options
| author | Christoph Hellwig <hch@lst.de> | 2013-04-21 14:53:46 -0500 |
|---|---|---|
| committer | Ben Myers <bpm@sgi.com> | 2013-04-21 14:53:46 -0500 |
| commit | ee1a47ab0e77600fcbdf1c87d461bd8f3f63150d (patch) | |
| tree | 6340d9f4b8b53c0d18045da1372599645375efce /fs/xfs/xfs_alloc_btree.h | |
| parent | a2050646f655a90400cbb66c3866d2e0137eee0c (diff) | |
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_alloc_btree.h')
| -rw-r--r-- | fs/xfs/xfs_alloc_btree.h | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/fs/xfs/xfs_alloc_btree.h b/fs/xfs/xfs_alloc_btree.h index 7e89a2b429dd..e3a3f7424192 100644 --- a/fs/xfs/xfs_alloc_btree.h +++ b/fs/xfs/xfs_alloc_btree.h @@ -31,8 +31,10 @@ struct xfs_mount; * by blockcount and blockno. All blocks look the same to make the code * simpler; if we have time later, we'll make the optimizations. */ -#define XFS_ABTB_MAGIC 0x41425442 /* 'ABTB' for bno tree */ -#define XFS_ABTC_MAGIC 0x41425443 /* 'ABTC' for cnt tree */ +#define XFS_ABTB_MAGIC 0x41425442 /* 'ABTB' for bno tree */ +#define XFS_ABTB_CRC_MAGIC 0x41423342 /* 'AB3B' */ +#define XFS_ABTC_MAGIC 0x41425443 /* 'ABTC' for cnt tree */ +#define XFS_ABTC_CRC_MAGIC 0x41423343 /* 'AB3C' */ /* * Data record/key structure @@ -59,10 +61,10 @@ typedef __be32 xfs_alloc_ptr_t; /* * Btree block header size depends on a superblock flag. - * - * (not quite yet, but soon) */ -#define XFS_ALLOC_BLOCK_LEN(mp) XFS_BTREE_SBLOCK_LEN +#define XFS_ALLOC_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. |