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authorDarrick J. Wong <darrick.wong@oracle.com>2016-10-03 09:11:51 -0700
committerDarrick J. Wong <darrick.wong@oracle.com>2016-10-05 16:26:31 -0700
commita35eb41519ab8db90e87d375ee9362d6e080ca4c (patch)
tree6db45615c97decf9d8c75bbc8c590e0ca5d936b2 /fs/xfs
parent4f435ebe7d0422af61cdcddbbcc659888645a1e1 (diff)
xfs: simulate per-AG reservations being critically low
Create an error injection point that enables us to simulate being critically low on per-AG block reservations. This should enable us to simulate this specific ENOSPC condition so that we can test falling back to a regular file copy. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'fs/xfs')
-rw-r--r--fs/xfs/libxfs/xfs_ag_resv.c4
-rw-r--r--fs/xfs/xfs_error.h4
2 files changed, 6 insertions, 2 deletions
diff --git a/fs/xfs/libxfs/xfs_ag_resv.c b/fs/xfs/libxfs/xfs_ag_resv.c
index adf770f0d011..e5ebc3770460 100644
--- a/fs/xfs/libxfs/xfs_ag_resv.c
+++ b/fs/xfs/libxfs/xfs_ag_resv.c
@@ -109,7 +109,9 @@ xfs_ag_resv_critical(
trace_xfs_ag_resv_critical(pag, type, avail);
/* Critically low if less than 10% or max btree height remains. */
- return avail < orig / 10 || avail < XFS_BTREE_MAXLEVELS;
+ return XFS_TEST_ERROR(avail < orig / 10 || avail < XFS_BTREE_MAXLEVELS,
+ pag->pag_mount, XFS_ERRTAG_AG_RESV_CRITICAL,
+ XFS_RANDOM_AG_RESV_CRITICAL);
}
/*
diff --git a/fs/xfs/xfs_error.h b/fs/xfs/xfs_error.h
index 8d8e1b07d295..05f8666733a0 100644
--- a/fs/xfs/xfs_error.h
+++ b/fs/xfs/xfs_error.h
@@ -95,7 +95,8 @@ extern void xfs_verifier_error(struct xfs_buf *bp);
#define XFS_ERRTAG_REFCOUNT_CONTINUE_UPDATE 24
#define XFS_ERRTAG_REFCOUNT_FINISH_ONE 25
#define XFS_ERRTAG_BMAP_FINISH_ONE 26
-#define XFS_ERRTAG_MAX 27
+#define XFS_ERRTAG_AG_RESV_CRITICAL 27
+#define XFS_ERRTAG_MAX 28
/*
* Random factors for above tags, 1 means always, 2 means 1/2 time, etc.
@@ -127,6 +128,7 @@ extern void xfs_verifier_error(struct xfs_buf *bp);
#define XFS_RANDOM_REFCOUNT_CONTINUE_UPDATE 1
#define XFS_RANDOM_REFCOUNT_FINISH_ONE 1
#define XFS_RANDOM_BMAP_FINISH_ONE 1
+#define XFS_RANDOM_AG_RESV_CRITICAL 4
#ifdef DEBUG
extern int xfs_error_test_active;