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xfs: convert drop_writes to use the errortag mechanism

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We now have enhanced error injection that can control the frequency
with which errors happen, so convert drop_writes to use this.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
This commit is contained in:
Darrick J. Wong 2017-06-20 17:54:48 -07:00
parent 9e24cfd044
commit f8c47250ba
5 changed files with 15 additions and 68 deletions
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12
fs/xfs/xfs_error.h
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@ -96,7 +96,16 @@ extern void xfs_verifier_error(struct xfs_buf *bp);
#define XFS_ERRTAG_REFCOUNT_FINISH_ONE 25
#define XFS_ERRTAG_BMAP_FINISH_ONE 26
#define XFS_ERRTAG_AG_RESV_CRITICAL 27
#define XFS_ERRTAG_MAX 28
/*
* DEBUG mode instrumentation to test and/or trigger delayed allocation
* block killing in the event of failed writes. When enabled, all
* buffered writes are silenty dropped and handled as if they failed.
* All delalloc blocks in the range of the write (including pre-existing
* delalloc blocks!) are tossed as part of the write failure error
* handling sequence.
*/
#define XFS_ERRTAG_DROP_WRITES 28
#define XFS_ERRTAG_MAX 29
/*
* Random factors for above tags, 1 means always, 2 means 1/2 time, etc.
@ -129,6 +138,7 @@ extern void xfs_verifier_error(struct xfs_buf *bp);
#define XFS_RANDOM_REFCOUNT_FINISH_ONE 1
#define XFS_RANDOM_BMAP_FINISH_ONE 1
#define XFS_RANDOM_AG_RESV_CRITICAL 4
#define XFS_RANDOM_DROP_WRITES 1
#ifdef DEBUG
extern int xfs_errortag_init(struct xfs_mount *mp);