include/trace/events/block.h - linux - Git at Google

 /* SPDX-License-Identifier: GPL-2.0 */
 #undef TRACE_SYSTEM
 #define TRACE_SYSTEM block

 #if !defined(_TRACE_BLOCK_H) || defined(TRACE_HEADER_MULTI_READ)
 #define _TRACE_BLOCK_H

 #include <linux/blktrace_api.h>
 #include <linux/blkdev.h>
 #include <linux/buffer_head.h>
 #include <linux/tracepoint.h>

 #define RWBS_LEN	8

 DECLARE_EVENT_CLASS(block_buffer,

 	TP_PROTO(struct buffer_head *bh),

 	TP_ARGS(bh),

 	TP_STRUCT__entry (
 		__field(  dev_t,	dev			)
 		__field(  sector_t,	sector			)
 		__field(  size_t,	size			)
 	),

 	TP_fast_assign(
 		__entry->dev		= bh->b_bdev->bd_dev;
 		__entry->sector		= bh->b_blocknr;
 		__entry->size		= bh->b_size;
 	),

 	TP_printk("%d,%d sector=%llu size=%zu",
 		MAJOR(__entry->dev), MINOR(__entry->dev),
 		(unsigned long long)__entry->sector, __entry->size
 	)
 );

 /**
  * block_touch_buffer - mark a buffer accessed
  * @bh: buffer_head being touched
  *
  * Called from touch_buffer().
  */
 DEFINE_EVENT(block_buffer, block_touch_buffer,

 	TP_PROTO(struct buffer_head *bh),

 	TP_ARGS(bh)
 );

 /**
  * block_dirty_buffer - mark a buffer dirty
  * @bh: buffer_head being dirtied
  *
  * Called from mark_buffer_dirty().
  */
 DEFINE_EVENT(block_buffer, block_dirty_buffer,

 	TP_PROTO(struct buffer_head *bh),

 	TP_ARGS(bh)
 );

 /**
  * block_rq_requeue - place block IO request back on a queue
  * @rq: block IO operation request
  *
  * The block operation request @rq is being placed back into queue
  * @q.  For some reason the request was not completed and needs to be
  * put back in the queue.
  */
 TRACE_EVENT(block_rq_requeue,

 	TP_PROTO(struct request *rq),

 	TP_ARGS(rq),

 	TP_STRUCT__entry(
 		__field(  dev_t,	dev			)
 		__field(  sector_t,	sector			)
 		__field(  unsigned int,	nr_sector		)
 		__array(  char,		rwbs,	RWBS_LEN	)
 		__dynamic_array( char,	cmd,	1		)
 	),

 	TP_fast_assign(
 		__entry->dev	   = rq->rq_disk ? disk_devt(rq->rq_disk) : 0;
 		__entry->sector    = blk_rq_trace_sector(rq);
 		__entry->nr_sector = blk_rq_trace_nr_sectors(rq);

 		blk_fill_rwbs(__entry->rwbs, rq->cmd_flags);
 		__get_str(cmd)[0] = '\0';
 	),

 	TP_printk("%d,%d %s (%s) %llu + %u [%d]",
 		  MAJOR(__entry->dev), MINOR(__entry->dev),
 		  __entry->rwbs, __get_str(cmd),
 		  (unsigned long long)__entry->sector,
 		  __entry->nr_sector, 0)
 );

 /**
  * block_rq_complete - block IO operation completed by device driver
  * @rq: block operations request
  * @error: status code
  * @nr_bytes: number of completed bytes
  *
  * The block_rq_complete tracepoint event indicates that some portion
  * of operation request has been completed by the device driver.  If
  * the @rq->bio is %NULL, then there is absolutely no additional work to
  * do for the request. If @rq->bio is non-NULL then there is
  * additional work required to complete the request.
  */
 TRACE_EVENT(block_rq_complete,

 	TP_PROTO(struct request *rq, blk_status_t error, unsigned int nr_bytes),

 	TP_ARGS(rq, error, nr_bytes),

 	TP_STRUCT__entry(
 		__field(  dev_t,	dev			)
 		__field(  sector_t,	sector			)
 		__field(  unsigned int,	nr_sector		)
 		__field(  int	,	error			)
 		__array(  char,		rwbs,	RWBS_LEN	)
 		__dynamic_array( char,	cmd,	1		)
 	),

 	TP_fast_assign(
 		__entry->dev	   = rq->rq_disk ? disk_devt(rq->rq_disk) : 0;
 		__entry->sector    = blk_rq_pos(rq);
 		__entry->nr_sector = nr_bytes >> 9;
 		__entry->error     = blk_status_to_errno(error);

 		blk_fill_rwbs(__entry->rwbs, rq->cmd_flags);
 		__get_str(cmd)[0] = '\0';
 	),

 	TP_printk("%d,%d %s (%s) %llu + %u [%d]",
 		  MAJOR(__entry->dev), MINOR(__entry->dev),
 		  __entry->rwbs, __get_str(cmd),
 		  (unsigned long long)__entry->sector,
 		  __entry->nr_sector, __entry->error)
 );

 DECLARE_EVENT_CLASS(block_rq,

 	TP_PROTO(struct request *rq),

 	TP_ARGS(rq),

 	TP_STRUCT__entry(
 		__field(  dev_t,	dev			)
 		__field(  sector_t,	sector			)
 		__field(  unsigned int,	nr_sector		)
 		__field(  unsigned int,	bytes			)
 		__array(  char,		rwbs,	RWBS_LEN	)
 		__array(  char,         comm,   TASK_COMM_LEN   )
 		__dynamic_array( char,	cmd,	1		)
 	),

 	TP_fast_assign(
 		__entry->dev	   = rq->rq_disk ? disk_devt(rq->rq_disk) : 0;
 		__entry->sector    = blk_rq_trace_sector(rq);
 		__entry->nr_sector = blk_rq_trace_nr_sectors(rq);
 		__entry->bytes     = blk_rq_bytes(rq);

 		blk_fill_rwbs(__entry->rwbs, rq->cmd_flags);
 		__get_str(cmd)[0] = '\0';
 		memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
 	),

 	TP_printk("%d,%d %s %u (%s) %llu + %u [%s]",
 		  MAJOR(__entry->dev), MINOR(__entry->dev),
 		  __entry->rwbs, __entry->bytes, __get_str(cmd),
 		  (unsigned long long)__entry->sector,
 		  __entry->nr_sector, __entry->comm)
 );

 /**
  * block_rq_insert - insert block operation request into queue
  * @rq: block IO operation request
  *
  * Called immediately before block operation request @rq is inserted
  * into queue @q.  The fields in the operation request @rq struct can
  * be examined to determine which device and sectors the pending
  * operation would access.
  */
 DEFINE_EVENT(block_rq, block_rq_insert,

 	TP_PROTO(struct request *rq),

 	TP_ARGS(rq)
 );

 /**
  * block_rq_issue - issue pending block IO request operation to device driver
  * @rq: block IO operation request
  *
  * Called when block operation request @rq from queue @q is sent to a
  * device driver for processing.
  */
 DEFINE_EVENT(block_rq, block_rq_issue,

 	TP_PROTO(struct request *rq),

 	TP_ARGS(rq)
 );

 /**
  * block_rq_merge - merge request with another one in the elevator
  * @rq: block IO operation request
  *
  * Called when block operation request @rq from queue @q is merged to another
  * request queued in the elevator.
  */
 DEFINE_EVENT(block_rq, block_rq_merge,

 	TP_PROTO(struct request *rq),

 	TP_ARGS(rq)
 );

 /**
  * block_bio_complete - completed all work on the block operation
  * @q: queue holding the block operation
  * @bio: block operation completed
  *
  * 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_ARGS(q, bio),

 	TP_STRUCT__entry(
 		__field( dev_t,		dev		)
 		__field( sector_t,	sector		)
 		__field( unsigned,	nr_sector	)
 		__field( int,		error		)
 		__array( char,		rwbs,	RWBS_LEN)
 	),

 	TP_fast_assign(
 		__entry->dev		= bio_dev(bio);
 		__entry->sector		= bio->bi_iter.bi_sector;
 		__entry->nr_sector	= bio_sectors(bio);
 		__entry->error		= blk_status_to_errno(bio->bi_status);
 		blk_fill_rwbs(__entry->rwbs, bio->bi_opf);
 	),

 	TP_printk("%d,%d %s %llu + %u [%d]",
 		  MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
 		  (unsigned long long)__entry->sector,
 		  __entry->nr_sector, __entry->error)
 );

 DECLARE_EVENT_CLASS(block_bio,

 	TP_PROTO(struct bio *bio),

 	TP_ARGS(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);
 		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_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
  * @bio: new block operation to merge
  *
  * Merging block request @bio to the end of an existing block request.
  */
 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
  * @bio: new block operation to merge
  *
  * Merging block IO operation @bio to the beginning of an existing block request.
  */
 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
  * @bio: new block operation
  *
  * About to place the block IO operation @bio into queue @q.
  */
 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
  * @bio: pending block IO operation (can be %NULL)
  *
  * A request struct has been allocated to handle the block IO operation @bio.
  */
 DEFINE_EVENT(block_bio, block_getrq,
 	TP_PROTO(struct bio *bio),
 	TP_ARGS(bio)
 );

 /**
  * block_plug - keep operations requests in request queue
  * @q: request queue to plug
  *
  * Plug the request queue @q.  Do not allow block operation requests
  * to be sent to the device driver. Instead, accumulate requests in
  * the queue to improve throughput performance of the block device.
  */
 TRACE_EVENT(block_plug,

 	TP_PROTO(struct request_queue *q),

 	TP_ARGS(q),

 	TP_STRUCT__entry(
 		__array( char,		comm,	TASK_COMM_LEN	)
 	),

 	TP_fast_assign(
 		memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
 	),

 	TP_printk("[%s]", __entry->comm)
 );

 DECLARE_EVENT_CLASS(block_unplug,

 	TP_PROTO(struct request_queue *q, unsigned int depth, bool explicit),

 	TP_ARGS(q, depth, explicit),

 	TP_STRUCT__entry(
 		__field( int,		nr_rq			)
 		__array( char,		comm,	TASK_COMM_LEN	)
 	),

 	TP_fast_assign(
 		__entry->nr_rq = depth;
 		memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
 	),

 	TP_printk("[%s] %d", __entry->comm, __entry->nr_rq)
 );

 /**
  * block_unplug - release of operations requests in request queue
  * @q: request queue to unplug
  * @depth: number of requests just added to the queue
  * @explicit: whether this was an explicit unplug, or one from schedule()
  *
  * Unplug request queue @q because device driver is scheduled to work
  * on elements in the request queue.
  */
 DEFINE_EVENT(block_unplug, block_unplug,

 	TP_PROTO(struct request_queue *q, unsigned int depth, bool explicit),

 	TP_ARGS(q, depth, explicit)
 );

 /**
  * block_split - split a single bio struct into two bio structs
  * @bio: block operation being split
  * @new_sector: The starting sector for the new bio
  *
  * The bio request @bio needs to be split into two bio requests.  The newly
  * created @bio request starts at @new_sector. This split may be required due to
  * hardware limitations such as operation crossing device boundaries in a RAID
  * system.
  */
 TRACE_EVENT(block_split,

 	TP_PROTO(struct bio *bio, unsigned int new_sector),

 	TP_ARGS(bio, new_sector),

 	TP_STRUCT__entry(
 		__field( dev_t,		dev				)
 		__field( sector_t,	sector				)
 		__field( sector_t,	new_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->new_sector	= new_sector;
 		blk_fill_rwbs(__entry->rwbs, bio->bi_opf);
 		memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
 	),

 	TP_printk("%d,%d %s %llu / %llu [%s]",
 		  MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
 		  (unsigned long long)__entry->sector,
 		  (unsigned long long)__entry->new_sector,
 		  __entry->comm)
 );

 /**
  * block_bio_remap - map request for a logical device to the raw device
  * @bio: revised operation
  * @dev: original device for the operation
  * @from: original sector for the operation
  *
  * An operation for a logical device has been mapped to the
  * raw block device.
  */
 TRACE_EVENT(block_bio_remap,

 	TP_PROTO(struct bio *bio, dev_t dev, sector_t from),

 	TP_ARGS(bio, dev, from),

 	TP_STRUCT__entry(
 		__field( dev_t,		dev		)
 		__field( sector_t,	sector		)
 		__field( unsigned int,	nr_sector	)
 		__field( dev_t,		old_dev		)
 		__field( sector_t,	old_sector	)
 		__array( char,		rwbs,	RWBS_LEN)
 	),

 	TP_fast_assign(
 		__entry->dev		= bio_dev(bio);
 		__entry->sector		= bio->bi_iter.bi_sector;
 		__entry->nr_sector	= bio_sectors(bio);
 		__entry->old_dev	= dev;
 		__entry->old_sector	= from;
 		blk_fill_rwbs(__entry->rwbs, bio->bi_opf);
 	),

 	TP_printk("%d,%d %s %llu + %u <- (%d,%d) %llu",
 		  MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
 		  (unsigned long long)__entry->sector,
 		  __entry->nr_sector,
 		  MAJOR(__entry->old_dev), MINOR(__entry->old_dev),
 		  (unsigned long long)__entry->old_sector)
 );

 /**
  * block_rq_remap - map request for a block operation request
  * @rq: block IO operation request
  * @dev: device for the operation
  * @from: original sector for the operation
  *
  * The block operation request @rq in @q has been remapped.  The block
  * operation request @rq holds the current information and @from hold
  * the original sector.
  */
 TRACE_EVENT(block_rq_remap,

 	TP_PROTO(struct request *rq, dev_t dev, sector_t from),

 	TP_ARGS(rq, dev, from),

 	TP_STRUCT__entry(
 		__field( dev_t,		dev		)
 		__field( sector_t,	sector		)
 		__field( unsigned int,	nr_sector	)
 		__field( dev_t,		old_dev		)
 		__field( sector_t,	old_sector	)
 		__field( unsigned int,	nr_bios		)
 		__array( char,		rwbs,	RWBS_LEN)
 	),

 	TP_fast_assign(
 		__entry->dev		= disk_devt(rq->rq_disk);
 		__entry->sector		= blk_rq_pos(rq);
 		__entry->nr_sector	= blk_rq_sectors(rq);
 		__entry->old_dev	= dev;
 		__entry->old_sector	= from;
 		__entry->nr_bios	= blk_rq_count_bios(rq);
 		blk_fill_rwbs(__entry->rwbs, rq->cmd_flags);
 	),

 	TP_printk("%d,%d %s %llu + %u <- (%d,%d) %llu %u",
 		  MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
 		  (unsigned long long)__entry->sector,
 		  __entry->nr_sector,
 		  MAJOR(__entry->old_dev), MINOR(__entry->old_dev),
 		  (unsigned long long)__entry->old_sector, __entry->nr_bios)
 );

 #endif /* _TRACE_BLOCK_H */

 /* This part must be outside protection */
 #include <trace/define_trace.h>
	/* SPDX-License-Identifier: GPL-2.0 */
	#undef TRACE_SYSTEM
	#define TRACE_SYSTEM block

	#if !defined(_TRACE_BLOCK_H) \|\| defined(TRACE_HEADER_MULTI_READ)
	#define _TRACE_BLOCK_H

	#include <linux/blktrace_api.h>
	#include <linux/blkdev.h>
	#include <linux/buffer_head.h>
	#include <linux/tracepoint.h>

	#define RWBS_LEN 8

	DECLARE_EVENT_CLASS(block_buffer,

	TP_PROTO(struct buffer_head *bh),

	TP_ARGS(bh),

	TP_STRUCT__entry (
	__field( dev_t, dev )
	__field( sector_t, sector )
	__field( size_t, size )
	),

	TP_fast_assign(
	__entry->dev = bh->b_bdev->bd_dev;
	__entry->sector = bh->b_blocknr;
	__entry->size = bh->b_size;
	),

	TP_printk("%d,%d sector=%llu size=%zu",
	MAJOR(__entry->dev), MINOR(__entry->dev),
	(unsigned long long)__entry->sector, __entry->size
	)
	);

	/**
	* block_touch_buffer - mark a buffer accessed
	* @bh: buffer_head being touched
	*
	* Called from touch_buffer().
	*/
	DEFINE_EVENT(block_buffer, block_touch_buffer,

	TP_PROTO(struct buffer_head *bh),

	TP_ARGS(bh)
	);

	/**
	* block_dirty_buffer - mark a buffer dirty
	* @bh: buffer_head being dirtied
	*
	* Called from mark_buffer_dirty().
	*/
	DEFINE_EVENT(block_buffer, block_dirty_buffer,

	TP_PROTO(struct buffer_head *bh),

	TP_ARGS(bh)
	);

	/**
	* block_rq_requeue - place block IO request back on a queue
	* @rq: block IO operation request
	*
	* The block operation request @rq is being placed back into queue
	* @q. For some reason the request was not completed and needs to be
	* put back in the queue.
	*/
	TRACE_EVENT(block_rq_requeue,

	TP_PROTO(struct request *rq),

	TP_ARGS(rq),

	TP_STRUCT__entry(
	__field( dev_t, dev )
	__field( sector_t, sector )
	__field( unsigned int, nr_sector )
	__array( char, rwbs, RWBS_LEN )
	__dynamic_array( char, cmd, 1 )
	),

	TP_fast_assign(
	__entry->dev = rq->rq_disk ? disk_devt(rq->rq_disk) : 0;
	__entry->sector = blk_rq_trace_sector(rq);
	__entry->nr_sector = blk_rq_trace_nr_sectors(rq);

	blk_fill_rwbs(__entry->rwbs, rq->cmd_flags);
	__get_str(cmd)[0] = '\0';
	),

	TP_printk("%d,%d %s (%s) %llu + %u [%d]",
	MAJOR(__entry->dev), MINOR(__entry->dev),
	__entry->rwbs, __get_str(cmd),
	(unsigned long long)__entry->sector,
	__entry->nr_sector, 0)
	);

	/**
	* block_rq_complete - block IO operation completed by device driver
	* @rq: block operations request
	* @error: status code
	* @nr_bytes: number of completed bytes
	*
	* The block_rq_complete tracepoint event indicates that some portion
	* of operation request has been completed by the device driver. If
	* the @rq->bio is %NULL, then there is absolutely no additional work to
	* do for the request. If @rq->bio is non-NULL then there is
	* additional work required to complete the request.
	*/
	TRACE_EVENT(block_rq_complete,

	TP_PROTO(struct request *rq, blk_status_t error, unsigned int nr_bytes),

	TP_ARGS(rq, error, nr_bytes),

	TP_STRUCT__entry(
	__field( dev_t, dev )
	__field( sector_t, sector )
	__field( unsigned int, nr_sector )
	__field( int , error )
	__array( char, rwbs, RWBS_LEN )
	__dynamic_array( char, cmd, 1 )
	),

	TP_fast_assign(
	__entry->dev = rq->rq_disk ? disk_devt(rq->rq_disk) : 0;
	__entry->sector = blk_rq_pos(rq);
	__entry->nr_sector = nr_bytes >> 9;
	__entry->error = blk_status_to_errno(error);

	blk_fill_rwbs(__entry->rwbs, rq->cmd_flags);
	__get_str(cmd)[0] = '\0';
	),

	TP_printk("%d,%d %s (%s) %llu + %u [%d]",
	MAJOR(__entry->dev), MINOR(__entry->dev),
	__entry->rwbs, __get_str(cmd),
	(unsigned long long)__entry->sector,
	__entry->nr_sector, __entry->error)
	);

	DECLARE_EVENT_CLASS(block_rq,

	TP_PROTO(struct request *rq),

	TP_ARGS(rq),

	TP_STRUCT__entry(
	__field( dev_t, dev )
	__field( sector_t, sector )
	__field( unsigned int, nr_sector )
	__field( unsigned int, bytes )
	__array( char, rwbs, RWBS_LEN )
	__array( char, comm, TASK_COMM_LEN )
	__dynamic_array( char, cmd, 1 )
	),

	TP_fast_assign(
	__entry->dev = rq->rq_disk ? disk_devt(rq->rq_disk) : 0;
	__entry->sector = blk_rq_trace_sector(rq);
	__entry->nr_sector = blk_rq_trace_nr_sectors(rq);
	__entry->bytes = blk_rq_bytes(rq);

	blk_fill_rwbs(__entry->rwbs, rq->cmd_flags);
	__get_str(cmd)[0] = '\0';
	memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
	),

	TP_printk("%d,%d %s %u (%s) %llu + %u [%s]",
	MAJOR(__entry->dev), MINOR(__entry->dev),
	__entry->rwbs, __entry->bytes, __get_str(cmd),
	(unsigned long long)__entry->sector,
	__entry->nr_sector, __entry->comm)
	);

	/**
	* block_rq_insert - insert block operation request into queue
	* @rq: block IO operation request
	*
	* Called immediately before block operation request @rq is inserted
	* into queue @q. The fields in the operation request @rq struct can
	* be examined to determine which device and sectors the pending
	* operation would access.
	*/
	DEFINE_EVENT(block_rq, block_rq_insert,

	TP_PROTO(struct request *rq),

	TP_ARGS(rq)
	);

	/**
	* block_rq_issue - issue pending block IO request operation to device driver
	* @rq: block IO operation request
	*
	* Called when block operation request @rq from queue @q is sent to a
	* device driver for processing.
	*/
	DEFINE_EVENT(block_rq, block_rq_issue,

	TP_PROTO(struct request *rq),

	TP_ARGS(rq)
	);

	/**
	* block_rq_merge - merge request with another one in the elevator
	* @rq: block IO operation request
	*
	* Called when block operation request @rq from queue @q is merged to another
	* request queued in the elevator.
	*/
	DEFINE_EVENT(block_rq, block_rq_merge,

	TP_PROTO(struct request *rq),

	TP_ARGS(rq)
	);

	/**
	* block_bio_complete - completed all work on the block operation
	* @q: queue holding the block operation
	* @bio: block operation completed
	*
	* 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_ARGS(q, bio),

	TP_STRUCT__entry(
	__field( dev_t, dev )
	__field( sector_t, sector )
	__field( unsigned, nr_sector )
	__field( int, error )
	__array( char, rwbs, RWBS_LEN)
	),

	TP_fast_assign(
	__entry->dev = bio_dev(bio);
	__entry->sector = bio->bi_iter.bi_sector;
	__entry->nr_sector = bio_sectors(bio);
	__entry->error = blk_status_to_errno(bio->bi_status);
	blk_fill_rwbs(__entry->rwbs, bio->bi_opf);
	),

	TP_printk("%d,%d %s %llu + %u [%d]",
	MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
	(unsigned long long)__entry->sector,
	__entry->nr_sector, __entry->error)
	);

	DECLARE_EVENT_CLASS(block_bio,

	TP_PROTO(struct bio *bio),

	TP_ARGS(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);
	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_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
	* @bio: new block operation to merge
	*
	* Merging block request @bio to the end of an existing block request.
	*/
	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
	* @bio: new block operation to merge
	*
	* Merging block IO operation @bio to the beginning of an existing block request.
	*/
	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
	* @bio: new block operation
	*
	* About to place the block IO operation @bio into queue @q.
	*/
	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
	* @bio: pending block IO operation (can be %NULL)
	*
	* A request struct has been allocated to handle the block IO operation @bio.
	*/
	DEFINE_EVENT(block_bio, block_getrq,
	TP_PROTO(struct bio *bio),
	TP_ARGS(bio)
	);

	/**
	* block_plug - keep operations requests in request queue
	* @q: request queue to plug
	*
	* Plug the request queue @q. Do not allow block operation requests
	* to be sent to the device driver. Instead, accumulate requests in
	* the queue to improve throughput performance of the block device.
	*/
	TRACE_EVENT(block_plug,

	TP_PROTO(struct request_queue *q),

	TP_ARGS(q),

	TP_STRUCT__entry(
	__array( char, comm, TASK_COMM_LEN )
	),

	TP_fast_assign(
	memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
	),

	TP_printk("[%s]", __entry->comm)
	);

	DECLARE_EVENT_CLASS(block_unplug,

	TP_PROTO(struct request_queue *q, unsigned int depth, bool explicit),

	TP_ARGS(q, depth, explicit),

	TP_STRUCT__entry(
	__field( int, nr_rq )
	__array( char, comm, TASK_COMM_LEN )
	),

	TP_fast_assign(
	__entry->nr_rq = depth;
	memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
	),

	TP_printk("[%s] %d", __entry->comm, __entry->nr_rq)
	);

	/**
	* block_unplug - release of operations requests in request queue
	* @q: request queue to unplug
	* @depth: number of requests just added to the queue
	* @explicit: whether this was an explicit unplug, or one from schedule()
	*
	* Unplug request queue @q because device driver is scheduled to work
	* on elements in the request queue.
	*/
	DEFINE_EVENT(block_unplug, block_unplug,

	TP_PROTO(struct request_queue *q, unsigned int depth, bool explicit),

	TP_ARGS(q, depth, explicit)
	);

	/**
	* block_split - split a single bio struct into two bio structs
	* @bio: block operation being split
	* @new_sector: The starting sector for the new bio
	*
	* The bio request @bio needs to be split into two bio requests. The newly
	* created @bio request starts at @new_sector. This split may be required due to
	* hardware limitations such as operation crossing device boundaries in a RAID
	* system.
	*/
	TRACE_EVENT(block_split,

	TP_PROTO(struct bio *bio, unsigned int new_sector),

	TP_ARGS(bio, new_sector),

	TP_STRUCT__entry(
	__field( dev_t, dev )
	__field( sector_t, sector )
	__field( sector_t, new_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->new_sector = new_sector;
	blk_fill_rwbs(__entry->rwbs, bio->bi_opf);
	memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
	),

	TP_printk("%d,%d %s %llu / %llu [%s]",
	MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
	(unsigned long long)__entry->sector,
	(unsigned long long)__entry->new_sector,
	__entry->comm)
	);

	/**
	* block_bio_remap - map request for a logical device to the raw device
	* @bio: revised operation
	* @dev: original device for the operation
	* @from: original sector for the operation
	*
	* An operation for a logical device has been mapped to the
	* raw block device.
	*/
	TRACE_EVENT(block_bio_remap,

	TP_PROTO(struct bio *bio, dev_t dev, sector_t from),

	TP_ARGS(bio, dev, from),

	TP_STRUCT__entry(
	__field( dev_t, dev )
	__field( sector_t, sector )
	__field( unsigned int, nr_sector )
	__field( dev_t, old_dev )
	__field( sector_t, old_sector )
	__array( char, rwbs, RWBS_LEN)
	),

	TP_fast_assign(
	__entry->dev = bio_dev(bio);
	__entry->sector = bio->bi_iter.bi_sector;
	__entry->nr_sector = bio_sectors(bio);
	__entry->old_dev = dev;
	__entry->old_sector = from;
	blk_fill_rwbs(__entry->rwbs, bio->bi_opf);
	),

	TP_printk("%d,%d %s %llu + %u <- (%d,%d) %llu",
	MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
	(unsigned long long)__entry->sector,
	__entry->nr_sector,
	MAJOR(__entry->old_dev), MINOR(__entry->old_dev),
	(unsigned long long)__entry->old_sector)
	);

	/**
	* block_rq_remap - map request for a block operation request
	* @rq: block IO operation request
	* @dev: device for the operation
	* @from: original sector for the operation
	*
	* The block operation request @rq in @q has been remapped. The block
	* operation request @rq holds the current information and @from hold
	* the original sector.
	*/
	TRACE_EVENT(block_rq_remap,

	TP_PROTO(struct request *rq, dev_t dev, sector_t from),

	TP_ARGS(rq, dev, from),

	TP_STRUCT__entry(
	__field( dev_t, dev )
	__field( sector_t, sector )
	__field( unsigned int, nr_sector )
	__field( dev_t, old_dev )
	__field( sector_t, old_sector )
	__field( unsigned int, nr_bios )
	__array( char, rwbs, RWBS_LEN)
	),

	TP_fast_assign(
	__entry->dev = disk_devt(rq->rq_disk);
	__entry->sector = blk_rq_pos(rq);
	__entry->nr_sector = blk_rq_sectors(rq);
	__entry->old_dev = dev;
	__entry->old_sector = from;
	__entry->nr_bios = blk_rq_count_bios(rq);
	blk_fill_rwbs(__entry->rwbs, rq->cmd_flags);
	),

	TP_printk("%d,%d %s %llu + %u <- (%d,%d) %llu %u",
	MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
	(unsigned long long)__entry->sector,
	__entry->nr_sector,
	MAJOR(__entry->old_dev), MINOR(__entry->old_dev),
	(unsigned long long)__entry->old_sector, __entry->nr_bios)
	);

	#endif /* _TRACE_BLOCK_H */

	/* This part must be outside protection */
	#include <trace/define_trace.h>