[PATCH v22 13/16] xfs: Add delayed attributes error tag

[Allison Henderson <allison.henderson@xxxxxxxxxx>]

This patch adds an error tag that we can use to test delayed attribute
recovery and replay

Signed-off-by: Allison Henderson <allison.henderson@xxxxxxxxxx>
Reviewed-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
 fs/xfs/libxfs/xfs_errortag.h | 4 +++-
 fs/xfs/xfs_attr_item.c       | 7 +++++++
 fs/xfs/xfs_error.c           | 3 +++
 3 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/fs/xfs/libxfs/xfs_errortag.h b/fs/xfs/libxfs/xfs_errortag.h
index a23a52e..46f359c 100644
--- a/fs/xfs/libxfs/xfs_errortag.h
+++ b/fs/xfs/libxfs/xfs_errortag.h
@@ -59,7 +59,8 @@
 #define XFS_ERRTAG_REDUCE_MAX_IEXTENTS			36
 #define XFS_ERRTAG_BMAP_ALLOC_MINLEN_EXTENT		37
 #define XFS_ERRTAG_AG_RESV_FAIL				38
-#define XFS_ERRTAG_MAX					39
+#define XFS_ERRTAG_DELAYED_ATTR				39
+#define XFS_ERRTAG_MAX					40
 
 /*
  * Random factors for above tags, 1 means always, 2 means 1/2 time, etc.
@@ -103,5 +104,6 @@
 #define XFS_RANDOM_REDUCE_MAX_IEXTENTS			1
 #define XFS_RANDOM_BMAP_ALLOC_MINLEN_EXTENT		1
 #define XFS_RANDOM_AG_RESV_FAIL				1
+#define XFS_RANDOM_DELAYED_ATTR				1
 
 #endif /* __XFS_ERRORTAG_H_ */
diff --git a/fs/xfs/xfs_attr_item.c b/fs/xfs/xfs_attr_item.c
index 12a0151..2efd94f 100644
--- a/fs/xfs/xfs_attr_item.c
+++ b/fs/xfs/xfs_attr_item.c
@@ -34,6 +34,7 @@
 #include "xfs_inode.h"
 #include "xfs_quota.h"
 #include "xfs_trans_space.h"
+#include "xfs_errortag.h"
 #include "xfs_error.h"
 #include "xfs_log_priv.h"
 #include "xfs_log_recover.h"
@@ -296,6 +297,11 @@ xfs_trans_attr_finish_update(
 	if (error)
 		return error;
 
+	if (XFS_TEST_ERROR(false, args->dp->i_mount, XFS_ERRTAG_DELAYED_ATTR)) {
+		error = -EIO;
+		goto out;
+	}
+
 	switch (op) {
 	case XFS_ATTR_OP_FLAGS_SET:
 		args->op_flags |= XFS_DA_OP_ADDNAME;
@@ -310,6 +316,7 @@ xfs_trans_attr_finish_update(
 		break;
 	}
 
+out:
 	/*
 	 * Mark the transaction dirty, even on error. This ensures the
 	 * transaction is aborted, which:
diff --git a/fs/xfs/xfs_error.c b/fs/xfs/xfs_error.c
index ce3bc1b..eca5e34 100644
--- a/fs/xfs/xfs_error.c
+++ b/fs/xfs/xfs_error.c
@@ -57,6 +57,7 @@ static unsigned int xfs_errortag_random_default[] = {
 	XFS_RANDOM_REDUCE_MAX_IEXTENTS,
 	XFS_RANDOM_BMAP_ALLOC_MINLEN_EXTENT,
 	XFS_RANDOM_AG_RESV_FAIL,
+	XFS_RANDOM_DELAYED_ATTR,
 };
 
 struct xfs_errortag_attr {
@@ -170,6 +171,7 @@ XFS_ERRORTAG_ATTR_RW(buf_ioerror,	XFS_ERRTAG_BUF_IOERROR);
 XFS_ERRORTAG_ATTR_RW(reduce_max_iextents,	XFS_ERRTAG_REDUCE_MAX_IEXTENTS);
 XFS_ERRORTAG_ATTR_RW(bmap_alloc_minlen_extent,	XFS_ERRTAG_BMAP_ALLOC_MINLEN_EXTENT);
 XFS_ERRORTAG_ATTR_RW(ag_resv_fail, XFS_ERRTAG_AG_RESV_FAIL);
+XFS_ERRORTAG_ATTR_RW(delayed_attr,	XFS_ERRTAG_DELAYED_ATTR);
 
 static struct attribute *xfs_errortag_attrs[] = {
 	XFS_ERRORTAG_ATTR_LIST(noerror),
@@ -211,6 +213,7 @@ static struct attribute *xfs_errortag_attrs[] = {
 	XFS_ERRORTAG_ATTR_LIST(reduce_max_iextents),
 	XFS_ERRORTAG_ATTR_LIST(bmap_alloc_minlen_extent),
 	XFS_ERRORTAG_ATTR_LIST(ag_resv_fail),
+	XFS_ERRORTAG_ATTR_LIST(delayed_attr),
 	NULL,
 };
 
-- 
2.7.4