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authorJeff Moyer <jmoyer@redhat.com>2011-01-06 20:41:42 +0100
committerJens Axboe <jaxboe@fusionio.com>2011-01-07 08:43:55 +0100
commitb7908c1035af7652cd613991b54dbff9c8b6bd3a (patch)
tree91dc24bbb1299ba7f84e22bbaffd28950dd04713
parent6c23a9681c0fe7fb7dd331b39dda11926f43746e (diff)
downloadop-kernel-dev-b7908c1035af7652cd613991b54dbff9c8b6bd3a.zip
op-kernel-dev-b7908c1035af7652cd613991b54dbff9c8b6bd3a.tar.gz
block: trace event block fix unassigned field
The "error" field in block_bio_complete is not assigned, leaving the memory area uninitialized (keeping garbage data). Pass an additional tracepoint argument to this event to initialize this field. Signed-off-by: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> CC: Steven Rostedt <rostedt@goodmis.org> CC: Frederic Weisbecker <fweisbec@gmail.com> CC: Ingo Molnar <mingo@elte.hu> CC: Thomas Gleixner <tglx@linutronix.de> CC: Li Zefan <lizf@cn.fujitsu.com> CC: Alan.Brunelle@hp.com Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
-rw-r--r--drivers/md/dm.c2
-rw-r--r--include/trace/events/block.h6
2 files changed, 5 insertions, 3 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 0a2b551..f48a2f3 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -630,7 +630,7 @@ static void dec_pending(struct dm_io *io, int error)
queue_io(md, bio);
} else {
/* done with normal IO or empty flush */
- trace_block_bio_complete(md->queue, bio);
+ trace_block_bio_complete(md->queue, bio, io_error);
bio_endio(bio, io_error);
}
}
diff --git a/include/trace/events/block.h b/include/trace/events/block.h
index b56c65dc..aba421d 100644
--- a/include/trace/events/block.h
+++ b/include/trace/events/block.h
@@ -206,15 +206,16 @@ TRACE_EVENT(block_bio_bounce,
* block_bio_complete - completed all work on the block operation
* @q: queue holding the block operation
* @bio: block operation completed
+ * @error: io error value
*
* This tracepoint indicates there is no further work to do on this
* block IO operation @bio.
*/
TRACE_EVENT(block_bio_complete,
- TP_PROTO(struct request_queue *q, struct bio *bio),
+ TP_PROTO(struct request_queue *q, struct bio *bio, int error),
- TP_ARGS(q, bio),
+ TP_ARGS(q, bio, error),
TP_STRUCT__entry(
__field( dev_t, dev )
@@ -228,6 +229,7 @@ TRACE_EVENT(block_bio_complete,
__entry->dev = bio->bi_bdev->bd_dev;
__entry->sector = bio->bi_sector;
__entry->nr_sector = bio->bi_size >> 9;
+ __entry->error = error;
blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_size);
),
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