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| author | Christoph Hellwig <hch@lst.de> | 2012-11-16 09:20:37 +1100 |
|---|---|---|
| committer | Ben Myers <bpm@sgi.com> | 2012-11-19 20:11:24 -0600 |
| commit | bc02e8693d875c2a9b0037cfd37fe0b726d26403 (patch) | |
| tree | 6896726d63947779f941a4daf055da142ad07985 /fs/xfs/xfs_sb.h | |
| parent | 1813dd64057490e7a0678a885c4fe6d02f78bdc1 (diff) | |
| download | linux-bc02e8693d875c2a9b0037cfd37fe0b726d26403.tar.gz linux-bc02e8693d875c2a9b0037cfd37fe0b726d26403.tar.bz2 linux-bc02e8693d875c2a9b0037cfd37fe0b726d26403.zip | |
xfs: add CRC infrastructure
- add a mount feature bit for CRC enabled filesystems
- add some helpers for generating and verifying the CRCs
- add a copy_uuid helper
The checksumming helpers are loosely based on similar ones in sctp,
all other bits come from Dave Chinner.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_sb.h')
| -rw-r--r-- | fs/xfs/xfs_sb.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/xfs/xfs_sb.h b/fs/xfs/xfs_sb.h index f429d9d5d325..a05b45175fb0 100644 --- a/fs/xfs/xfs_sb.h +++ b/fs/xfs/xfs_sb.h @@ -81,6 +81,7 @@ struct xfs_mount; #define XFS_SB_VERSION2_ATTR2BIT 0x00000008 /* Inline attr rework */ #define XFS_SB_VERSION2_PARENTBIT 0x00000010 /* parent pointers */ #define XFS_SB_VERSION2_PROJID32BIT 0x00000080 /* 32 bit project id */ +#define XFS_SB_VERSION2_CRCBIT 0x00000100 /* metadata CRCs */ #define XFS_SB_VERSION2_OKREALFBITS \ (XFS_SB_VERSION2_LAZYSBCOUNTBIT | \ @@ -503,6 +504,12 @@ static inline int xfs_sb_version_hasprojid32bit(xfs_sb_t *sbp) (sbp->sb_features2 & XFS_SB_VERSION2_PROJID32BIT); } +static inline int xfs_sb_version_hascrc(xfs_sb_t *sbp) +{ + return (xfs_sb_version_hasmorebits(sbp) && + (sbp->sb_features2 & XFS_SB_VERSION2_CRCBIT)); +} + /* * end of superblock version macros */ |