block: add tracepoint for blk_zone_update_request_bio

Add a tracepoint in blk_zone_update_request_bio() to trace the bio sector
update on ZONE APPEND completions.

An example for this tracepoint is as follows:

<idle>-0 [001] d.h1.  381.746444: blk_zone_update_request_bio: 259,5 ZAS 131072 () 1048832 + 256 none,0,0 [swapper/1]

Signed-off-by: Johannes Thumshirn <[email protected]>
Reviewed-by: Damien Le Moal <[email protected]>

Author: morbidrsa

block/blk-zoned.c

@@ -17,6 +17,8 @@
 #include <linux/refcount.h>
 #include <linux/mempool.h>
 
+#include <trace/events/block.h>
+
 #include "blk.h"
 #include "blk-mq-sched.h"
 #include "blk-mq-debugfs.h"
@@ -1216,6 +1218,7 @@ void blk_zone_append_update_request_bio(struct request *rq, struct bio *bio)
 	 * lookup the zone write plug.
 	 */
 	bio->bi_iter.bi_sector = rq->__sector;
+	trace_blk_zone_append_update_request_bio(rq);
 }
 
 void blk_zone_write_plug_bio_endio(struct bio *bio)

include/trace/events/block.h

@@ -404,6 +404,17 @@ DEFINE_EVENT(block_bio, block_getrq,
 	TP_ARGS(bio)
 );
 
+/**
+ * block_zone_update_request_bio - update the bio sector after a zone append
+ * @bio: the completed block IO operation
+ *
+ * Update the bio's bi_sector after a zone append command has been completed.
+ */
+DEFINE_EVENT(block_rq, blk_zone_append_update_request_bio,
+	     TP_PROTO(struct request *rq),
+	     TP_ARGS(rq)
+);
+
 /**
  * block_plug - keep operations requests in request queue
  * @q: request queue to plug