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xfs: check minimum block size for CRC filesystems 

Check the minimum block size on v5 filesystems.

[dchinner: cleaned up XFS_MIN_CRC_BLOCKSIZE check]

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Darrick J. Wong 2016-11-09 12:11:12 +11:00 committed by Dave Chinner
parent 4fd29ec472
commit bec9d48d7a
2 changed files with 9 additions and 0 deletions
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6
fs/xfs/libxfs/xfs_sb.c
View File

@ -262,6 +262,12 @@ xfs_mount_validate_sb(
return -EFSCORRUPTED;
}
if (xfs_sb_version_hascrc(&mp->m_sb) &&
sbp->sb_blocksize < XFS_MIN_CRC_BLOCKSIZE) {
xfs_notice(mp, "v5 SB sanity check failed");
return -EFSCORRUPTED;
}
/*
* Until this is fixed only page-sized or smaller data blocks work.
*/

3
fs/xfs/libxfs/xfs_types.h
View File

@ -75,11 +75,14 @@ typedef __int64_t xfs_sfiloff_t; /* signed block number in a file */
* Minimum and maximum blocksize and sectorsize.
* The blocksize upper limit is pretty much arbitrary.
* The sectorsize upper limit is due to sizeof(sb_sectsize).
* CRC enable filesystems use 512 byte inodes, meaning 512 byte block sizes
* cannot be used.
*/
#define XFS_MIN_BLOCKSIZE_LOG 9 /* i.e. 512 bytes */
#define XFS_MAX_BLOCKSIZE_LOG 16 /* i.e. 65536 bytes */
#define XFS_MIN_BLOCKSIZE (1 << XFS_MIN_BLOCKSIZE_LOG)
#define XFS_MAX_BLOCKSIZE (1 << XFS_MAX_BLOCKSIZE_LOG)
#define XFS_MIN_CRC_BLOCKSIZE (1 << (XFS_MIN_BLOCKSIZE_LOG + 1))
#define XFS_MIN_SECTORSIZE_LOG 9 /* i.e. 512 bytes */
#define XFS_MAX_SECTORSIZE_LOG 15 /* i.e. 32768 bytes */
#define XFS_MIN_SECTORSIZE (1 << XFS_MIN_SECTORSIZE_LOG)