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xfs: don't log the entire end of the AGF 

When we're logging the last non-spare field in the AGF, we don't
need to log the spare fields, so plumb in a new AGF logging flag
to help us avoid that.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Darrick J. Wong 2016-08-26 15:59:31 +10:00 committed by Dave Chinner
parent 738f57c16a
commit da1f039d69
2 changed files with 6 additions and 2 deletions
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2
fs/xfs/libxfs/xfs_alloc.c
View File

@ -2278,6 +2278,8 @@ xfs_alloc_log_agf(
offsetof(xfs_agf_t, agf_btreeblks),
offsetof(xfs_agf_t, agf_uuid),
offsetof(xfs_agf_t, agf_rmap_blocks),
/* needed so that we don't log the whole rest of the structure: */
offsetof(xfs_agf_t, agf_spare64),
sizeof(xfs_agf_t)
};

6
fs/xfs/libxfs/xfs_format.h
View File

@ -674,7 +674,8 @@ typedef struct xfs_agf {
#define XFS_AGF_BTREEBLKS 0x00000800
#define XFS_AGF_UUID 0x00001000
#define XFS_AGF_RMAP_BLOCKS 0x00002000
#define XFS_AGF_NUM_BITS 14
#define XFS_AGF_SPARE64 0x00004000
#define XFS_AGF_NUM_BITS 15
#define XFS_AGF_ALL_BITS ((1 << XFS_AGF_NUM_BITS) - 1)
#define XFS_AGF_FLAGS \
@ -691,7 +692,8 @@ typedef struct xfs_agf {
{ XFS_AGF_LONGEST, "LONGEST" }, \
{ XFS_AGF_BTREEBLKS, "BTREEBLKS" }, \
{ XFS_AGF_UUID, "UUID" }, \
{ XFS_AGF_RMAP_BLOCKS, "RMAP_BLOCKS" }
{ XFS_AGF_RMAP_BLOCKS, "RMAP_BLOCKS" }, \
{ XFS_AGF_SPARE64, "SPARE64" }
/* disk block (xfs_daddr_t) in the AG */
#define XFS_AGF_DADDR(mp) ((xfs_daddr_t)(1 << (mp)->m_sectbb_log))