xfs: random buffer write failure errortag

Source kernel commit: 7376d74547344598008d00419eae0caa5f50f4f0

Introduce an error tag to randomly fail async buffer writes. This is
primarily to facilitate testing of the XFS error configuration
mechanism.

Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Allison Collins <allison.henderson@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Eric Sandeen <sandeen@sandeen.net>

diff --git a/io/inject.c b/io/inject.c
index 4191c84ead4114f702b69305fab1cd22c2d550a4..352d27ce5d1c07fb875909c1d832e28d0d1d90d5 100644 (file)
--- a/io/inject.c
+++ b/io/inject.c
@@ -54,6 +54,7 @@ error_tag(char *name)
                { XFS_ERRTAG_FORCE_SCRUB_REPAIR,        "force_repair" },
                { XFS_ERRTAG_FORCE_SUMMARY_RECALC,      "bad_summary" },
                { XFS_ERRTAG_IUNLINK_FALLBACK,          "iunlink_fallback" },
+               { XFS_ERRTAG_BUF_IOERROR,               "buf_ioerror" },
                { XFS_ERRTAG_MAX,                       NULL }
        };
        int     count;

diff --git a/libxfs/xfs_errortag.h b/libxfs/xfs_errortag.h
index 79e6c4fb1d8a8440ae744c2bc032658da0bb5da0..2486dab19023d2924717c4c99fa721e364232e5d 100644 (file)
--- a/libxfs/xfs_errortag.h
+++ b/libxfs/xfs_errortag.h
@@ -55,7 +55,8 @@
 #define XFS_ERRTAG_FORCE_SCRUB_REPAIR                  32
 #define XFS_ERRTAG_FORCE_SUMMARY_RECALC                        33
 #define XFS_ERRTAG_IUNLINK_FALLBACK                    34
-#define XFS_ERRTAG_MAX                                 35
+#define XFS_ERRTAG_BUF_IOERROR                         35
+#define XFS_ERRTAG_MAX                                 36
 
 /*
  * Random factors for above tags, 1 means always, 2 means 1/2 time, etc.
@@ -95,5 +96,6 @@
 #define XFS_RANDOM_FORCE_SCRUB_REPAIR                  1
 #define XFS_RANDOM_FORCE_SUMMARY_RECALC                        1
 #define XFS_RANDOM_IUNLINK_FALLBACK                    (XFS_RANDOM_DEFAULT/10)
+#define XFS_RANDOM_BUF_IOERROR                         XFS_RANDOM_DEFAULT
 
 #endif /* __XFS_ERRORTAG_H_ */