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| 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_buf_item.h | |
| parent | a2050646f655a90400cbb66c3866d2e0137eee0c (diff) | |
| download | lwn-ee1a47ab0e77600fcbdf1c87d461bd8f3f63150d.tar.gz lwn-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_buf_item.h')
| -rw-r--r-- | fs/xfs/xfs_buf_item.h | 24 |
1 files changed, 19 insertions, 5 deletions
diff --git a/fs/xfs/xfs_buf_item.h b/fs/xfs/xfs_buf_item.h index ee36c88ecfde..101ef8377f1b 100644 --- a/fs/xfs/xfs_buf_item.h +++ b/fs/xfs/xfs_buf_item.h @@ -24,19 +24,33 @@ extern kmem_zone_t *xfs_buf_item_zone; * This flag indicates that the buffer contains on disk inodes * and requires special recovery handling. */ -#define XFS_BLF_INODE_BUF 0x1 +#define XFS_BLF_INODE_BUF (1<<0) /* * This flag indicates that the buffer should not be replayed * during recovery because its blocks are being freed. */ -#define XFS_BLF_CANCEL 0x2 +#define XFS_BLF_CANCEL (1<<1) + /* * This flag indicates that the buffer contains on disk * user or group dquots and may require special recovery handling. */ -#define XFS_BLF_UDQUOT_BUF 0x4 -#define XFS_BLF_PDQUOT_BUF 0x8 -#define XFS_BLF_GDQUOT_BUF 0x10 +#define XFS_BLF_UDQUOT_BUF (1<<2) +#define XFS_BLF_PDQUOT_BUF (1<<3) +#define XFS_BLF_GDQUOT_BUF (1<<4) + +/* + * all buffers now need flags to tell recovery where the magic number + * is so that it can verify and calculate the CRCs on the buffer correctly + * once the changes have been replayed into the buffer. + */ +#define XFS_BLF_BTREE_BUF (1<<5) + +#define XFS_BLF_TYPE_MASK \ + (XFS_BLF_UDQUOT_BUF | \ + XFS_BLF_PDQUOT_BUF | \ + XFS_BLF_GDQUOT_BUF | \ + XFS_BLF_BTREE_BUF) #define XFS_BLF_CHUNK 128 #define XFS_BLF_SHIFT 7 |