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authorDarrick J. Wong <darrick.wong@oracle.com>2017-06-20 17:54:48 -0700
committerDarrick J. Wong <darrick.wong@oracle.com>2017-06-27 18:23:20 -0700
commitf8c47250ba46eb221d1ac537266ac65bcf2866d5 (patch)
tree34b722bde56dd32d002993116f97a433013720f5 /fs/xfs/xfs_error.h
parent9e24cfd044853e0e46e7149b91b7bb09effb0a79 (diff)
xfs: convert drop_writes to use the errortag mechanism
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>
Diffstat (limited to 'fs/xfs/xfs_error.h')
-rw-r--r--fs/xfs/xfs_error.h12
1 files changed, 11 insertions, 1 deletions
diff --git a/fs/xfs/xfs_error.h b/fs/xfs/xfs_error.h
index ae8935b90a93..e0e4cf776fac 100644
--- a/fs/xfs/xfs_error.h
+++ b/fs/xfs/xfs_error.h
@@ -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);