blktrace: correct remap names
This attempts to clarify names utilized during block I/O remap
operations (partition, volume manager). It correctly matches up the
/from/ information for both device & sector. This takes in the concept
from Kosaki Motohiro and extends it to include better naming for the
"device_from" field.
[ Impact: cleanup ]
Signed-off-by: Alan D. Brunelle <alan.brunelle@hp.com>
Reviewed-by: Li Zefan <lizf@cn.fujitsu.com>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <49FF4FAE.3000301@hp.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/include/linux/blktrace_api.h b/include/linux/blktrace_api.h
index 62763c9..82b4636 100644
--- a/include/linux/blktrace_api.h
+++ b/include/linux/blktrace_api.h
@@ -116,9 +116,9 @@
* The remap event
*/
struct blk_io_trace_remap {
- __be32 device;
__be32 device_from;
- __be64 sector;
+ __be32 device_to;
+ __be64 sector_from;
};
enum {
diff --git a/include/trace/block.h b/include/trace/block.h
index 25b7068..87f6456 100644
--- a/include/trace/block.h
+++ b/include/trace/block.h
@@ -70,7 +70,7 @@
DECLARE_TRACE(block_remap,
TP_PROTO(struct request_queue *q, struct bio *bio, dev_t dev,
- sector_t from, sector_t to),
- TP_ARGS(q, bio, dev, from, to));
+ sector_t to, sector_t from),
+ TP_ARGS(q, bio, dev, to, from));
#endif