/include/trace/events/block.h

  1#undef TRACE_SYSTEM
  2#define TRACE_SYSTEM block
  3
  4#if !defined(_TRACE_BLOCK_H) || defined(TRACE_HEADER_MULTI_READ)
  5#define _TRACE_BLOCK_H
  6
  7#include <linux/blktrace_api.h>
  8#include <linux/blkdev.h>
  9#include <linux/tracepoint.h>
 10
 11DECLARE_EVENT_CLASS(block_rq_with_error,
 12
 13	TP_PROTO(struct request_queue *q, struct request *rq),
 14
 15	TP_ARGS(q, rq),
 16
 17	TP_STRUCT__entry(
 18		__field(  dev_t,	dev			)
 19		__field(  sector_t,	sector			)
 20		__field(  unsigned int,	nr_sector		)
 21		__field(  int,		errors			)
 22		__array(  char,		rwbs,	6		)
 23		__dynamic_array( char,	cmd,	blk_cmd_buf_len(rq)	)
 24	),
 25
 26	TP_fast_assign(
 27		__entry->dev	   = rq->rq_disk ? disk_devt(rq->rq_disk) : 0;
 28		__entry->sector    = blk_pc_request(rq) ? 0 : blk_rq_pos(rq);
 29		__entry->nr_sector = blk_pc_request(rq) ? 0 : blk_rq_sectors(rq);
 30		__entry->errors    = rq->errors;
 31
 32		blk_fill_rwbs_rq(__entry->rwbs, rq);
 33		blk_dump_cmd(__get_str(cmd), rq);
 34	),
 35
 36	TP_printk("%d,%d %s (%s) %llu + %u [%d]",
 37		  MAJOR(__entry->dev), MINOR(__entry->dev),
 38		  __entry->rwbs, __get_str(cmd),
 39		  (unsigned long long)__entry->sector,
 40		  __entry->nr_sector, __entry->errors)
 41);
 42
 43/**
 44 * block_rq_abort - abort block operation request
 45 * @q: queue containing the block operation request
 46 * @rq: block IO operation request
 47 *
 48 * Called immediately after pending block IO operation request @rq in
 49 * queue @q is aborted. The fields in the operation request @rq
 50 * can be examined to determine which device and sectors the pending
 51 * operation would access.
 52 */
 53DEFINE_EVENT(block_rq_with_error, block_rq_abort,
 54
 55	TP_PROTO(struct request_queue *q, struct request *rq),
 56
 57	TP_ARGS(q, rq)
 58);
 59
 60/**
 61 * block_rq_requeue - place block IO request back on a queue
 62 * @q: queue holding operation
 63 * @rq: block IO operation request
 64 *
 65 * The block operation request @rq is being placed back into queue
 66 * @q.  For some reason the request was not completed and needs to be
 67 * put back in the queue.
 68 */
 69DEFINE_EVENT(block_rq_with_error, block_rq_requeue,
 70
 71	TP_PROTO(struct request_queue *q, struct request *rq),
 72
 73	TP_ARGS(q, rq)
 74);
 75
 76/**
 77 * block_rq_complete - block IO operation completed by device driver
 78 * @q: queue containing the block operation request
 79 * @rq: block operations request
 80 *
 81 * The block_rq_complete tracepoint event indicates that some portion
 82 * of operation request has been completed by the device driver.  If
 83 * the @rq->bio is %NULL, then there is absolutely no additional work to
 84 * do for the request. If @rq->bio is non-NULL then there is
 85 * additional work required to complete the request.
 86 */
 87DEFINE_EVENT(block_rq_with_error, block_rq_complete,
 88
 89	TP_PROTO(struct request_queue *q, struct request *rq),
 90
 91	TP_ARGS(q, rq)
 92);
 93
 94DECLARE_EVENT_CLASS(block_rq,
 95
 96	TP_PROTO(struct request_queue *q, struct request *rq),
 97
 98	TP_ARGS(q, rq),
 99
100	TP_STRUCT__entry(
101		__field(  dev_t,	dev			)
102		__field(  sector_t,	sector			)
103		__field(  unsigned int,	nr_sector		)
104		__field(  unsigned int,	bytes			)
105		__array(  char,		rwbs,	6		)
106		__array(  char,         comm,   TASK_COMM_LEN   )
107		__dynamic_array( char,	cmd,	blk_cmd_buf_len(rq)	)
108	),
109
110	TP_fast_assign(
111		__entry->dev	   = rq->rq_disk ? disk_devt(rq->rq_disk) : 0;
112		__entry->sector    = blk_pc_request(rq) ? 0 : blk_rq_pos(rq);
113		__entry->nr_sector = blk_pc_request(rq) ? 0 : blk_rq_sectors(rq);
114		__entry->bytes     = blk_pc_request(rq) ? blk_rq_bytes(rq) : 0;
115
116		blk_fill_rwbs_rq(__entry->rwbs, rq);
117		blk_dump_cmd(__get_str(cmd), rq);
118		memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
119	),
120
121	TP_printk("%d,%d %s %u (%s) %llu + %u [%s]",
122		  MAJOR(__entry->dev), MINOR(__entry->dev),
123		  __entry->rwbs, __entry->bytes, __get_str(cmd),
124		  (unsigned long long)__entry->sector,
125		  __entry->nr_sector, __entry->comm)
126);
127
128/**
129 * block_rq_insert - insert block operation request into queue
130 * @q: target queue
131 * @rq: block IO operation request
132 *
133 * Called immediately before block operation request @rq is inserted
134 * into queue @q.  The fields in the operation request @rq struct can
135 * be examined to determine which device and sectors the pending
136 * operation would access.
137 */
138DEFINE_EVENT(block_rq, block_rq_insert,
139
140	TP_PROTO(struct request_queue *q, struct request *rq),
141
142	TP_ARGS(q, rq)
143);
144
145/**
146 * block_rq_issue - issue pending block IO request operation to device driver
147 * @q: queue holding operation
148 * @rq: block IO operation operation request
149 *
150 * Called when block operation request @rq from queue @q is sent to a
151 * device driver for processing.
152 */
153DEFINE_EVENT(block_rq, block_rq_issue,
154
155	TP_PROTO(struct request_queue *q, struct request *rq),
156
157	TP_ARGS(q, rq)
158);
159
160/**
161 * block_bio_bounce - used bounce buffer when processing block operation
162 * @q: queue holding the block operation
163 * @bio: block operation
164 *
165 * A bounce buffer was used to handle the block operation @bio in @q.
166 * This occurs when hardware limitations prevent a direct transfer of
167 * data between the @bio data memory area and the IO device.  Use of a
168 * bounce buffer requires extra copying of data and decreases
169 * performance.
170 */
171TRACE_EVENT(block_bio_bounce,
172
173	TP_PROTO(struct request_queue *q, struct bio *bio),
174
175	TP_ARGS(q, bio),
176
177	TP_STRUCT__entry(
178		__field( dev_t,		dev			)
179		__field( sector_t,	sector			)
180		__field( unsigned int,	nr_sector		)
181		__array( char,		rwbs,	6		)
182		__array( char,		comm,	TASK_COMM_LEN	)
183	),
184
185	TP_fast_assign(
186		__entry->dev		= bio->bi_bdev ?
187					  bio->bi_bdev->bd_dev : 0;
188		__entry->sector		= bio->bi_sector;
189		__entry->nr_sector	= bio->bi_size >> 9;
190		blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_size);
191		memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
192	),
193
194	TP_printk("%d,%d %s %llu + %u [%s]",
195		  MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
196		  (unsigned long long)__entry->sector,
197		  __entry->nr_sector, __entry->comm)
198);
199
200/**
201 * block_bio_complete - completed all work on the block operation
202 * @q: queue holding the block operation
203 * @bio: block operation completed
204 *
205 * This tracepoint indicates there is no further work to do on this
206 * block IO operation @bio.
207 */
208TRACE_EVENT(block_bio_complete,
209
210	TP_PROTO(struct request_queue *q, struct bio *bio),
211
212	TP_ARGS(q, bio),
213
214	TP_STRUCT__entry(
215		__field( dev_t,		dev		)
216		__field( sector_t,	sector		)
217		__field( unsigned,	nr_sector	)
218		__field( int,		error		)
219		__array( char,		rwbs,	6	)
220	),
221
222	TP_fast_assign(
223		__entry->dev		= bio->bi_bdev->bd_dev;
224		__entry->sector		= bio->bi_sector;
225		__entry->nr_sector	= bio->bi_size >> 9;
226		blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_size);
227	),
228
229	TP_printk("%d,%d %s %llu + %u [%d]",
230		  MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
231		  (unsigned long long)__entry->sector,
232		  __entry->nr_sector, __entry->error)
233);
234
235DECLARE_EVENT_CLASS(block_bio,
236
237	TP_PROTO(struct request_queue *q, struct bio *bio),
238
239	TP_ARGS(q, bio),
240
241	TP_STRUCT__entry(
242		__field( dev_t,		dev			)
243		__field( sector_t,	sector			)
244		__field( unsigned int,	nr_sector		)
245		__array( char,		rwbs,	6		)
246		__array( char,		comm,	TASK_COMM_LEN	)
247	),
248
249	TP_fast_assign(
250		__entry->dev		= bio->bi_bdev->bd_dev;
251		__entry->sector		= bio->bi_sector;
252		__entry->nr_sector	= bio->bi_size >> 9;
253		blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_size);
254		memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
255	),
256
257	TP_printk("%d,%d %s %llu + %u [%s]",
258		  MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
259		  (unsigned long long)__entry->sector,
260		  __entry->nr_sector, __entry->comm)
261);
262
263/**
264 * block_bio_backmerge - merging block operation to the end of an existing operation
265 * @q: queue holding operation
266 * @bio: new block operation to merge
267 *
268 * Merging block request @bio to the end of an existing block request
269 * in queue @q.
270 */
271DEFINE_EVENT(block_bio, block_bio_backmerge,
272
273	TP_PROTO(struct request_queue *q, struct bio *bio),
274
275	TP_ARGS(q, bio)
276);
277
278/**
279 * block_bio_frontmerge - merging block operation to the beginning of an existing operation
280 * @q: queue holding operation
281 * @bio: new block operation to merge
282 *
283 * Merging block IO operation @bio to the beginning of an existing block
284 * operation in queue @q.
285 */
286DEFINE_EVENT(block_bio, block_bio_frontmerge,
287
288	TP_PROTO(struct request_queue *q, struct bio *bio),
289
290	TP_ARGS(q, bio)
291);
292
293/**
294 * block_bio_queue - putting new block IO operation in queue
295 * @q: queue holding operation
296 * @bio: new block operation
297 *
298 * About to place the block IO operation @bio into queue @q.
299 */
300DEFINE_EVENT(block_bio, block_bio_queue,
301
302	TP_PROTO(struct request_queue *q, struct bio *bio),
303
304	TP_ARGS(q, bio)
305);
306
307DECLARE_EVENT_CLASS(block_get_rq,
308
309	TP_PROTO(struct request_queue *q, struct bio *bio, int rw),
310
311	TP_ARGS(q, bio, rw),
312
313	TP_STRUCT__entry(
314		__field( dev_t,		dev			)
315		__field( sector_t,	sector			)
316		__field( unsigned int,	nr_sector		)
317		__array( char,		rwbs,	6		)
318		__array( char,		comm,	TASK_COMM_LEN	)
319        ),
320
321	TP_fast_assign(
322		__entry->dev		= bio ? bio->bi_bdev->bd_dev : 0;
323		__entry->sector		= bio ? bio->bi_sector : 0;
324		__entry->nr_sector	= bio ? bio->bi_size >> 9 : 0;
325		blk_fill_rwbs(__entry->rwbs,
326			      bio ? bio->bi_rw : 0, __entry->nr_sector);
327		memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
328        ),
329
330	TP_printk("%d,%d %s %llu + %u [%s]",
331		  MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
332		  (unsigned long long)__entry->sector,
333		  __entry->nr_sector, __entry->comm)
334);
335
336/**
337 * block_getrq - get a free request entry in queue for block IO operations
338 * @q: queue for operations
339 * @bio: pending block IO operation
340 * @rw: low bit indicates a read (%0) or a write (%1)
341 *
342 * A request struct for queue @q has been allocated to handle the
343 * block IO operation @bio.
344 */
345DEFINE_EVENT(block_get_rq, block_getrq,
346
347	TP_PROTO(struct request_queue *q, struct bio *bio, int rw),
348
349	TP_ARGS(q, bio, rw)
350);
351
352/**
353 * block_sleeprq - waiting to get a free request entry in queue for block IO operation
354 * @q: queue for operation
355 * @bio: pending block IO operation
356 * @rw: low bit indicates a read (%0) or a write (%1)
357 *
358 * In the case where a request struct cannot be provided for queue @q
359 * the process needs to wait for an request struct to become
360 * available.  This tracepoint event is generated each time the
361 * process goes to sleep waiting for request struct become available.
362 */
363DEFINE_EVENT(block_get_rq, block_sleeprq,
364
365	TP_PROTO(struct request_queue *q, struct bio *bio, int rw),
366
367	TP_ARGS(q, bio, rw)
368);
369
370/**
371 * block_plug - keep operations requests in request queue
372 * @q: request queue to plug
373 *
374 * Plug the request queue @q.  Do not allow block operation requests
375 * to be sent to the device driver. Instead, accumulate requests in
376 * the queue to improve throughput performance of the block device.
377 */
378TRACE_EVENT(block_plug,
379
380	TP_PROTO(struct request_queue *q),
381
382	TP_ARGS(q),
383
384	TP_STRUCT__entry(
385		__array( char,		comm,	TASK_COMM_LEN	)
386	),
387
388	TP_fast_assign(
389		memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
390	),
391
392	TP_printk("[%s]", __entry->comm)
393);
394
395DECLARE_EVENT_CLASS(block_unplug,
396
397	TP_PROTO(struct request_queue *q),
398
399	TP_ARGS(q),
400
401	TP_STRUCT__entry(
402		__field( int,		nr_rq			)
403		__array( char,		comm,	TASK_COMM_LEN	)
404	),
405
406	TP_fast_assign(
407		__entry->nr_rq	= q->rq.count[READ] + q->rq.count[WRITE];
408		memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
409	),
410
411	TP_printk("[%s] %d", __entry->comm, __entry->nr_rq)
412);
413
414/**
415 * block_unplug_timer - timed release of operations requests in queue to device driver
416 * @q: request queue to unplug
417 *
418 * Unplug the request queue @q because a timer expired and allow block
419 * operation requests to be sent to the device driver.
420 */
421DEFINE_EVENT(block_unplug, block_unplug_timer,
422
423	TP_PROTO(struct request_queue *q),
424
425	TP_ARGS(q)
426);
427
428/**
429 * block_unplug_io - release of operations requests in request queue
430 * @q: request queue to unplug
431 *
432 * Unplug request queue @q because device driver is scheduled to work
433 * on elements in the request queue.
434 */
435DEFINE_EVENT(block_unplug, block_unplug_io,
436
437	TP_PROTO(struct request_queue *q),
438
439	TP_ARGS(q)
440);
441
442/**
443 * block_split - split a single bio struct into two bio structs
444 * @q: queue containing the bio
445 * @bio: block operation being split
446 * @new_sector: The starting sector for the new bio
447 *
448 * The bio request @bio in request queue @q needs to be split into two
449 * bio requests. The newly created @bio request starts at
450 * @new_sector. This split may be required due to hardware limitation
451 * such as operation crossing device boundaries in a RAID system.
452 */
453TRACE_EVENT(block_split,
454
455	TP_PROTO(struct request_queue *q, struct bio *bio,
456		 unsigned int new_sector),
457
458	TP_ARGS(q, bio, new_sector),
459
460	TP_STRUCT__entry(
461		__field( dev_t,		dev				)
462		__field( sector_t,	sector				)
463		__field( sector_t,	new_sector			)
464		__array( char,		rwbs,		6		)
465		__array( char,		comm,		TASK_COMM_LEN	)
466	),
467
468	TP_fast_assign(
469		__entry->dev		= bio->bi_bdev->bd_dev;
470		__entry->sector		= bio->bi_sector;
471		__entry->new_sector	= new_sector;
472		blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_size);
473		memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
474	),
475
476	TP_printk("%d,%d %s %llu / %llu [%s]",
477		  MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
478		  (unsigned long long)__entry->sector,
479		  (unsigned long long)__entry->new_sector,
480		  __entry->comm)
481);
482
483/**
484 * block_remap - map request for a partition to the raw device
485 * @q: queue holding the operation
486 * @bio: revised operation
487 * @dev: device for the operation
488 * @from: original sector for the operation
489 *
490 * An operation for a partition on a block device has been mapped to the
491 * raw block device.
492 */
493TRACE_EVENT(block_remap,
494
495	TP_PROTO(struct request_queue *q, struct bio *bio, dev_t dev,
496		 sector_t from),
497
498	TP_ARGS(q, bio, dev, from),
499
500	TP_STRUCT__entry(
501		__field( dev_t,		dev		)
502		__field( sector_t,	sector		)
503		__field( unsigned int,	nr_sector	)
504		__field( dev_t,		old_dev		)
505		__field( sector_t,	old_sector	)
506		__array( char,		rwbs,	6	)
507	),
508
509	TP_fast_assign(
510		__entry->dev		= bio->bi_bdev->bd_dev;
511		__entry->sector		= bio->bi_sector;
512		__entry->nr_sector	= bio->bi_size >> 9;
513		__entry->old_dev	= dev;
514		__entry->old_sector	= from;
515		blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_size);
516	),
517
518	TP_printk("%d,%d %s %llu + %u <- (%d,%d) %llu",
519		  MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
520		  (unsigned long long)__entry->sector,
521		  __entry->nr_sector,
522		  MAJOR(__entry->old_dev), MINOR(__entry->old_dev),
523		  (unsigned long long)__entry->old_sector)
524);
525
526/**
527 * block_rq_remap - map request for a block operation request
528 * @q: queue holding the operation
529 * @rq: block IO operation request
530 * @dev: device for the operation
531 * @from: original sector for the operation
532 *
533 * The block operation request @rq in @q has been remapped.  The block
534 * operation request @rq holds the current information and @from hold
535 * the original sector.
536 */
537TRACE_EVENT(block_rq_remap,
538
539	TP_PROTO(struct request_queue *q, struct request *rq, dev_t dev,
540		 sector_t from),
541
542	TP_ARGS(q, rq, dev, from),
543
544	TP_STRUCT__entry(
545		__field( dev_t,		dev		)
546		__field( sector_t,	sector		)
547		__field( unsigned int,	nr_sector	)
548		__field( dev_t,		old_dev		)
549		__field( sector_t,	old_sector	)
550		__array( char,		rwbs,	6	)
551	),
552
553	TP_fast_assign(
554		__entry->dev		= disk_devt(rq->rq_disk);
555		__entry->sector		= blk_rq_pos(rq);
556		__entry->nr_sector	= blk_rq_sectors(rq);
557		__entry->old_dev	= dev;
558		__entry->old_sector	= from;
559		blk_fill_rwbs_rq(__entry->rwbs, rq);
560	),
561
562	TP_printk("%d,%d %s %llu + %u <- (%d,%d) %llu",
563		  MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
564		  (unsigned long long)__entry->sector,
565		  __entry->nr_sector,
566		  MAJOR(__entry->old_dev), MINOR(__entry->old_dev),
567		  (unsigned long long)__entry->old_sector)
568);
569
570#endif /* _TRACE_BLOCK_H */
571
572/* This part must be outside protection */
573#include <trace/define_trace.h>
574