[007/115] xfs: add error injection to test file mapping exchange recovery

Commit Message

Darrick J. Wong July 30, 2024, 12:25 a.m. UTC

From: Darrick J. Wong <[e-mail]>

Source kernel commit: 5fd022ec7d420dfca1eaaf997923a5d4dd0dcf62

Add an errortag so that we can test recovery of exchmaps log items.

Signed-off-by: Darrick J. Wong <[e-mail]>
Reviewed-by: Christoph Hellwig <[e-mail]>
---
 io/inject.c           |    1 +
 libxfs/xfs_errortag.h |    4 +++-
 libxfs/xfs_exchmaps.c |    3 +++
 3 files changed, 7 insertions(+), 1 deletion(-)

Patch

diff --git a/io/inject.c b/io/inject.c
index 6ef1fc8d2..4aeb6da32 100644
--- a/io/inject.c
+++ b/io/inject.c
@@ -63,6 +63,7 @@  error_tag(char *name)
 		{ XFS_ERRTAG_ATTR_LEAF_TO_NODE,		"attr_leaf_to_node" },
 		{ XFS_ERRTAG_WB_DELAY_MS,		"wb_delay_ms" },
 		{ XFS_ERRTAG_WRITE_DELAY_MS,		"write_delay_ms" },
+		{ XFS_ERRTAG_EXCHMAPS_FINISH_ONE,	"exchmaps_finish_one" },
 		{ XFS_ERRTAG_MAX,			NULL }
 	};
 	int	count;
diff --git a/libxfs/xfs_errortag.h b/libxfs/xfs_errortag.h
index 01a9e86b3..7002d7676 100644
--- a/libxfs/xfs_errortag.h
+++ b/libxfs/xfs_errortag.h
@@ -63,7 +63,8 @@ 
 #define XFS_ERRTAG_ATTR_LEAF_TO_NODE			41
 #define XFS_ERRTAG_WB_DELAY_MS				42
 #define XFS_ERRTAG_WRITE_DELAY_MS			43
-#define XFS_ERRTAG_MAX					44
+#define XFS_ERRTAG_EXCHMAPS_FINISH_ONE			44
+#define XFS_ERRTAG_MAX					45
 
 /*
  * Random factors for above tags, 1 means always, 2 means 1/2 time, etc.
@@ -111,5 +112,6 @@ 
 #define XFS_RANDOM_ATTR_LEAF_TO_NODE			1
 #define XFS_RANDOM_WB_DELAY_MS				3000
 #define XFS_RANDOM_WRITE_DELAY_MS			3000
+#define XFS_RANDOM_EXCHMAPS_FINISH_ONE			1
 
 #endif /* __XFS_ERRORTAG_H_ */
diff --git a/libxfs/xfs_exchmaps.c b/libxfs/xfs_exchmaps.c
index b2c35032d..ef30d0b27 100644
--- a/libxfs/xfs_exchmaps.c
+++ b/libxfs/xfs_exchmaps.c
@@ -434,6 +434,9 @@  xfs_exchmaps_finish_one(
 			return error;
 	}
 
+	if (XFS_TEST_ERROR(false, tp->t_mountp, XFS_ERRTAG_EXCHMAPS_FINISH_ONE))
+		return -EIO;
+
 	/* If we still have work to do, ask for a new transaction. */
 	if (xmi_has_more_exchange_work(xmi) || xmi_has_postop_work(xmi)) {
 		trace_xfs_exchmaps_defer(tp->t_mountp, xmi);