summaryrefslogtreecommitdiffstats
path: root/fs/xfs/xfs_ialloc_btree.h
diff options
context:
space:
mode:
authorChristoph Hellwig <hch@lst.de>2013-04-21 14:53:46 -0500
committerBen Myers <bpm@sgi.com>2013-04-21 14:53:46 -0500
commitee1a47ab0e77600fcbdf1c87d461bd8f3f63150d (patch)
tree6340d9f4b8b53c0d18045da1372599645375efce /fs/xfs/xfs_ialloc_btree.h
parenta2050646f655a90400cbb66c3866d2e0137eee0c (diff)
downloadlinux-ee1a47ab0e77600fcbdf1c87d461bd8f3f63150d.tar.gz
linux-ee1a47ab0e77600fcbdf1c87d461bd8f3f63150d.tar.bz2
linux-ee1a47ab0e77600fcbdf1c87d461bd8f3f63150d.zip
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.h9
1 files changed, 5 insertions, 4 deletions
diff --git a/fs/xfs/xfs_ialloc_btree.h b/fs/xfs/xfs_ialloc_btree.h
index 25c0239a8eab..3ac36b7642e9 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.