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authorBrian Foster <bfoster@redhat.com>2017-08-08 18:21:52 -0700
committerDarrick J. Wong <darrick.wong@oracle.com>2017-08-22 09:22:24 -0700
commit7f4d01f36a3ac16f539f0fd3839de5d58fa4940f (patch)
treee564fe47a4384c36233cb1ac2cb9f87055fa234f /fs/xfs/xfs_error.h
parent4a4f66eac4681378996a1837ad1ffec3a2e2981f (diff)
xfs: add log item pinning error injection tag
Add an error injection tag to force log items in the AIL to the pinned state. This option can be used by test infrastructure to induce head behind tail conditions. Specifically, this is intended to be used by xfstests to reproduce log recovery problems after failed/corrupted log writes overwrite the last good tail LSN in the log. When enabled, AIL push attempts see log items in the AIL in the pinned state. This stalls metadata writeback and thus prevents the current tail of the log from moving forward. When disabled, subsequent AIL pushes observe the log items in their appropriate state and filesystem operation continues as normal. Signed-off-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Diffstat (limited to 'fs/xfs/xfs_error.h')
-rw-r--r--fs/xfs/xfs_error.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/xfs/xfs_error.h b/fs/xfs/xfs_error.h
index 7577be5f09bc..7c4bef3bddb7 100644
--- a/fs/xfs/xfs_error.h
+++ b/fs/xfs/xfs_error.h
@@ -106,7 +106,8 @@ extern void xfs_verifier_error(struct xfs_buf *bp);
*/
#define XFS_ERRTAG_DROP_WRITES 28
#define XFS_ERRTAG_LOG_BAD_CRC 29
-#define XFS_ERRTAG_MAX 30
+#define XFS_ERRTAG_LOG_ITEM_PIN 30
+#define XFS_ERRTAG_MAX 31
/*
* Random factors for above tags, 1 means always, 2 means 1/2 time, etc.
@@ -141,6 +142,7 @@ extern void xfs_verifier_error(struct xfs_buf *bp);
#define XFS_RANDOM_AG_RESV_CRITICAL 4
#define XFS_RANDOM_DROP_WRITES 1
#define XFS_RANDOM_LOG_BAD_CRC 1
+#define XFS_RANDOM_LOG_ITEM_PIN 1
#ifdef DEBUG
extern int xfs_errortag_init(struct xfs_mount *mp);