block: simplify and extend the block_bio_merge tracepoint class

The block_bio_merge tracepoint class can be reused for most bio-based
tracepoints.  For that it just needs to lose the superfluous q and rq
parameters.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

1 files changed, 33 insertions, 125 deletions

diff --git a/include/trace/events/block.h b/include/trace/events/block.h
index 76459cf750e1..506c29dc7c76 100644
--- a/include/trace/events/block.h
+++ b/include/trace/events/block.h
@@ -227,45 +227,6 @@ DEFINE_EVENT(block_rq, block_rq_merge,
 );
 
 /**
- * block_bio_bounce - used bounce buffer when processing block operation
- * @q: queue holding the block operation
- * @bio: block operation
- *
- * A bounce buffer was used to handle the block operation @bio in @q.
- * This occurs when hardware limitations prevent a direct transfer of
- * data between the @bio data memory area and the IO device.  Use of a
- * bounce buffer requires extra copying of data and decreases
- * performance.
- */
-TRACE_EVENT(block_bio_bounce,
-
-	TP_PROTO(struct request_queue *q, struct bio *bio),
-
-	TP_ARGS(q, bio),
-
-	TP_STRUCT__entry(
-		__field( dev_t,		dev			)
-		__field( sector_t,	sector			)
-		__field( unsigned int,	nr_sector		)
-		__array( char,		rwbs,	RWBS_LEN	)
-		__array( char,		comm,	TASK_COMM_LEN	)
-	),
-
-	TP_fast_assign(
-		__entry->dev		= bio_dev(bio);
-		__entry->sector		= bio->bi_iter.bi_sector;
-		__entry->nr_sector	= bio_sectors(bio);
-		blk_fill_rwbs(__entry->rwbs, bio->bi_opf, bio->bi_iter.bi_size);
-		memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
-	),
-
-	TP_printk("%d,%d %s %llu + %u [%s]",
-		  MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
-		  (unsigned long long)__entry->sector,
-		  __entry->nr_sector, __entry->comm)
-);
-
-/**
  * block_bio_complete - completed all work on the block operation
  * @q: queue holding the block operation
  * @bio: block operation completed
@@ -301,11 +262,11 @@ TRACE_EVENT(block_bio_complete,
 		  __entry->nr_sector, __entry->error)
 );
 
-DECLARE_EVENT_CLASS(block_bio_merge,
+DECLARE_EVENT_CLASS(block_bio,
 
-	TP_PROTO(struct request_queue *q, struct request *rq, struct bio *bio),
+	TP_PROTO(struct bio *bio),
 
-	TP_ARGS(q, rq, bio),
+	TP_ARGS(bio),
 
 	TP_STRUCT__entry(
 		__field( dev_t,		dev			)
@@ -330,115 +291,62 @@ DECLARE_EVENT_CLASS(block_bio_merge,
 );
 
 /**
+ * block_bio_bounce - used bounce buffer when processing block operation
+ * @bio: block operation
+ *
+ * A bounce buffer was used to handle the block operation @bio in @q.
+ * This occurs when hardware limitations prevent a direct transfer of
+ * data between the @bio data memory area and the IO device.  Use of a
+ * bounce buffer requires extra copying of data and decreases
+ * performance.
+ */
+DEFINE_EVENT(block_bio, block_bio_bounce,
+	TP_PROTO(struct bio *bio),
+	TP_ARGS(bio)
+);
+
+/**
  * block_bio_backmerge - merging block operation to the end of an existing operation
- * @q: queue holding operation
- * @rq: request bio is being merged into
  * @bio: new block operation to merge
  *
- * Merging block request @bio to the end of an existing block request
- * in queue @q.
+ * Merging block request @bio to the end of an existing block request.
  */
-DEFINE_EVENT(block_bio_merge, block_bio_backmerge,
-
-	TP_PROTO(struct request_queue *q, struct request *rq, struct bio *bio),
-
-	TP_ARGS(q, rq, bio)
+DEFINE_EVENT(block_bio, block_bio_backmerge,
+	TP_PROTO(struct bio *bio),
+	TP_ARGS(bio)
 );
 
 /**
  * block_bio_frontmerge - merging block operation to the beginning of an existing operation
- * @q: queue holding operation
- * @rq: request bio is being merged into
  * @bio: new block operation to merge
  *
- * Merging block IO operation @bio to the beginning of an existing block
- * operation in queue @q.
+ * Merging block IO operation @bio to the beginning of an existing block request.
  */
-DEFINE_EVENT(block_bio_merge, block_bio_frontmerge,
-
-	TP_PROTO(struct request_queue *q, struct request *rq, struct bio *bio),
-
-	TP_ARGS(q, rq, bio)
+DEFINE_EVENT(block_bio, block_bio_frontmerge,
+	TP_PROTO(struct bio *bio),
+	TP_ARGS(bio)
 );
 
 /**
  * block_bio_queue - putting new block IO operation in queue
- * @q: queue holding operation
  * @bio: new block operation
  *
  * About to place the block IO operation @bio into queue @q.
  */
-TRACE_EVENT(block_bio_queue,
-
-	TP_PROTO(struct request_queue *q, struct bio *bio),
-
-	TP_ARGS(q, bio),
-
-	TP_STRUCT__entry(
-		__field( dev_t,		dev			)
-		__field( sector_t,	sector			)
-		__field( unsigned int,	nr_sector		)
-		__array( char,		rwbs,	RWBS_LEN	)
-		__array( char,		comm,	TASK_COMM_LEN	)
-	),
-
-	TP_fast_assign(
-		__entry->dev		= bio_dev(bio);
-		__entry->sector		= bio->bi_iter.bi_sector;
-		__entry->nr_sector	= bio_sectors(bio);
-		blk_fill_rwbs(__entry->rwbs, bio->bi_opf, bio->bi_iter.bi_size);
-		memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
-	),
-
-	TP_printk("%d,%d %s %llu + %u [%s]",
-		  MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
-		  (unsigned long long)__entry->sector,
-		  __entry->nr_sector, __entry->comm)
-);
-
-DECLARE_EVENT_CLASS(block_get_rq,
-
-	TP_PROTO(struct request_queue *q, struct bio *bio, int rw),
-
-	TP_ARGS(q, bio, rw),
-
-	TP_STRUCT__entry(
-		__field( dev_t,		dev			)
-		__field( sector_t,	sector			)
-		__field( unsigned int,	nr_sector		)
-		__array( char,		rwbs,	RWBS_LEN	)
-		__array( char,		comm,	TASK_COMM_LEN	)
-        ),
-
-	TP_fast_assign(
-		__entry->dev		= bio ? bio_dev(bio) : 0;
-		__entry->sector		= bio ? bio->bi_iter.bi_sector : 0;
-		__entry->nr_sector	= bio ? bio_sectors(bio) : 0;
-		blk_fill_rwbs(__entry->rwbs,
-			      bio ? bio->bi_opf : 0, __entry->nr_sector);
-		memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
-        ),
-
-	TP_printk("%d,%d %s %llu + %u [%s]",
-		  MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
-		  (unsigned long long)__entry->sector,
-		  __entry->nr_sector, __entry->comm)
+DEFINE_EVENT(block_bio, block_bio_queue,
+	TP_PROTO(struct bio *bio),
+	TP_ARGS(bio)
 );
 
 /**
  * block_getrq - get a free request entry in queue for block IO operations
- * @q: queue for operations
  * @bio: pending block IO operation (can be %NULL)
- * @rw: low bit indicates a read (%0) or a write (%1)
  *
- * A request struct for queue @q has been allocated to handle the
- * block IO operation @bio.
+ * A request struct has been allocated to handle the block IO operation @bio.
  */
-DEFINE_EVENT(block_get_rq, block_getrq,
-
-	TP_PROTO(struct request_queue *q, struct bio *bio, int rw),
-
-	TP_ARGS(q, bio, rw)
+DEFINE_EVENT(block_bio, block_getrq,
+	TP_PROTO(struct bio *bio),
+	TP_ARGS(bio)
 );
 
 /**