forge/linux-pinenote
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

xfs: add support for large btree blocks

Browse source 
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>
This commit is contained in:
Christoph Hellwig 2013-04-21 14:53:46 -05:00 • committed by Ben Myers
parent a2050646f6
commit ee1a47ab0e
17 changed files with 642 additions and 206 deletions
Download patch file Download diff file Expand all files Collapse all files

24
fs/xfs/xfs_buf_item.h
View file

@ -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