[RFC PATCH v3 2/2] xfs: add leaf to node error tag

[Catherine Hoang <catherine.hoang@oracle.com>]

Add an error tag on xfs_attr3_leaf_to_node to test log attribute
recovery and replay.

Signed-off-by: Catherine Hoang <catherine.hoang@oracle.com>
Reviewed-by: Allison Henderson <allison.henderson@oracle.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
---
 fs/xfs/libxfs/xfs_attr_leaf.c | 6 ++++++
 fs/xfs/libxfs/xfs_errortag.h  | 4 +++-
 fs/xfs/xfs_error.c            | 3 +++
 3 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/fs/xfs/libxfs/xfs_attr_leaf.c b/fs/xfs/libxfs/xfs_attr_leaf.c
index 74b76b09509f..0fe028d95c77 100644
--- a/fs/xfs/libxfs/xfs_attr_leaf.c
+++ b/fs/xfs/libxfs/xfs_attr_leaf.c
@@ -28,6 +28,7 @@
 #include "xfs_dir2.h"
 #include "xfs_log.h"
 #include "xfs_ag.h"
+#include "xfs_errortag.h"
 
 
 /*
@@ -1189,6 +1190,11 @@ xfs_attr3_leaf_to_node(
 
 	trace_xfs_attr_leaf_to_node(args);
 
+	if (XFS_TEST_ERROR(false, mp, XFS_ERRTAG_LARP_LEAF_TO_NODE)) {
+		error = -EIO;
+		goto out;
+	}
+
 	error = xfs_da_grow_inode(args, &blkno);
 	if (error)
 		goto out;
diff --git a/fs/xfs/libxfs/xfs_errortag.h b/fs/xfs/libxfs/xfs_errortag.h
index 6d06a502bbdf..74b753194615 100644
--- a/fs/xfs/libxfs/xfs_errortag.h
+++ b/fs/xfs/libxfs/xfs_errortag.h
@@ -61,7 +61,8 @@
 #define XFS_ERRTAG_AG_RESV_FAIL				38
 #define XFS_ERRTAG_LARP					39
 #define XFS_ERRTAG_DA_LEAF_SPLIT			40
-#define XFS_ERRTAG_MAX					41
+#define XFS_ERRTAG_LARP_LEAF_TO_NODE			41
+#define XFS_ERRTAG_MAX					42
 
 /*
  * Random factors for above tags, 1 means always, 2 means 1/2 time, etc.
@@ -107,5 +108,6 @@
 #define XFS_RANDOM_AG_RESV_FAIL				1
 #define XFS_RANDOM_LARP					1
 #define XFS_RANDOM_DA_LEAF_SPLIT			1
+#define XFS_RANDOM_LARP_LEAF_TO_NODE			1
 
 #endif /* __XFS_ERRORTAG_H_ */
diff --git a/fs/xfs/xfs_error.c b/fs/xfs/xfs_error.c
index 2aa5d4d2b30a..94ae630dc819 100644
--- a/fs/xfs/xfs_error.c
+++ b/fs/xfs/xfs_error.c
@@ -59,6 +59,7 @@ static unsigned int xfs_errortag_random_default[] = {
 	XFS_RANDOM_AG_RESV_FAIL,
 	XFS_RANDOM_LARP,
 	XFS_RANDOM_DA_LEAF_SPLIT,
+	XFS_RANDOM_LARP_LEAF_TO_NODE,
 };
 
 struct xfs_errortag_attr {
@@ -174,6 +175,7 @@ XFS_ERRORTAG_ATTR_RW(bmap_alloc_minlen_extent,	XFS_ERRTAG_BMAP_ALLOC_MINLEN_EXTE
 XFS_ERRORTAG_ATTR_RW(ag_resv_fail, XFS_ERRTAG_AG_RESV_FAIL);
 XFS_ERRORTAG_ATTR_RW(larp,		XFS_ERRTAG_LARP);
 XFS_ERRORTAG_ATTR_RW(da_leaf_split,	XFS_ERRTAG_DA_LEAF_SPLIT);
+XFS_ERRORTAG_ATTR_RW(larp_leaf_to_node,	XFS_ERRTAG_LARP_LEAF_TO_NODE);
 
 static struct attribute *xfs_errortag_attrs[] = {
 	XFS_ERRORTAG_ATTR_LIST(noerror),
@@ -217,6 +219,7 @@ static struct attribute *xfs_errortag_attrs[] = {
 	XFS_ERRORTAG_ATTR_LIST(ag_resv_fail),
 	XFS_ERRORTAG_ATTR_LIST(larp),
 	XFS_ERRORTAG_ATTR_LIST(da_leaf_split),
+	XFS_ERRORTAG_ATTR_LIST(larp_leaf_to_node),
 	NULL,
 };
 ATTRIBUTE_GROUPS(xfs_errortag);
-- 
2.25.1