Loading...
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
11#define RWBS_LEN 8
12
13DECLARE_EVENT_CLASS(block_rq_with_error,
14
15 TP_PROTO(struct request_queue *q, struct request *rq),
16
17 TP_ARGS(q, rq),
18
19 TP_STRUCT__entry(
20 __field( dev_t, dev )
21 __field( sector_t, sector )
22 __field( unsigned int, nr_sector )
23 __field( int, errors )
24 __array( char, rwbs, RWBS_LEN )
25 __dynamic_array( char, cmd, blk_cmd_buf_len(rq) )
26 ),
27
28 TP_fast_assign(
29 __entry->dev = rq->rq_disk ? disk_devt(rq->rq_disk) : 0;
30 __entry->sector = (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
31 0 : blk_rq_pos(rq);
32 __entry->nr_sector = (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
33 0 : blk_rq_sectors(rq);
34 __entry->errors = rq->errors;
35
36 blk_fill_rwbs(__entry->rwbs, rq->cmd_flags, blk_rq_bytes(rq));
37 blk_dump_cmd(__get_str(cmd), rq);
38 ),
39
40 TP_printk("%d,%d %s (%s) %llu + %u [%d]",
41 MAJOR(__entry->dev), MINOR(__entry->dev),
42 __entry->rwbs, __get_str(cmd),
43 (unsigned long long)__entry->sector,
44 __entry->nr_sector, __entry->errors)
45);
46
47/**
48 * block_rq_abort - abort block operation request
49 * @q: queue containing the block operation request
50 * @rq: block IO operation request
51 *
52 * Called immediately after pending block IO operation request @rq in
53 * queue @q is aborted. The fields in the operation request @rq
54 * can be examined to determine which device and sectors the pending
55 * operation would access.
56 */
57DEFINE_EVENT(block_rq_with_error, block_rq_abort,
58
59 TP_PROTO(struct request_queue *q, struct request *rq),
60
61 TP_ARGS(q, rq)
62);
63
64/**
65 * block_rq_requeue - place block IO request back on a queue
66 * @q: queue holding operation
67 * @rq: block IO operation request
68 *
69 * The block operation request @rq is being placed back into queue
70 * @q. For some reason the request was not completed and needs to be
71 * put back in the queue.
72 */
73DEFINE_EVENT(block_rq_with_error, block_rq_requeue,
74
75 TP_PROTO(struct request_queue *q, struct request *rq),
76
77 TP_ARGS(q, rq)
78);
79
80/**
81 * block_rq_complete - block IO operation completed by device driver
82 * @q: queue containing the block operation request
83 * @rq: block operations request
84 *
85 * The block_rq_complete tracepoint event indicates that some portion
86 * of operation request has been completed by the device driver. If
87 * the @rq->bio is %NULL, then there is absolutely no additional work to
88 * do for the request. If @rq->bio is non-NULL then there is
89 * additional work required to complete the request.
90 */
91DEFINE_EVENT(block_rq_with_error, block_rq_complete,
92
93 TP_PROTO(struct request_queue *q, struct request *rq),
94
95 TP_ARGS(q, rq)
96);
97
98DECLARE_EVENT_CLASS(block_rq,
99
100 TP_PROTO(struct request_queue *q, struct request *rq),
101
102 TP_ARGS(q, rq),
103
104 TP_STRUCT__entry(
105 __field( dev_t, dev )
106 __field( sector_t, sector )
107 __field( unsigned int, nr_sector )
108 __field( unsigned int, bytes )
109 __array( char, rwbs, RWBS_LEN )
110 __array( char, comm, TASK_COMM_LEN )
111 __dynamic_array( char, cmd, blk_cmd_buf_len(rq) )
112 ),
113
114 TP_fast_assign(
115 __entry->dev = rq->rq_disk ? disk_devt(rq->rq_disk) : 0;
116 __entry->sector = (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
117 0 : blk_rq_pos(rq);
118 __entry->nr_sector = (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
119 0 : blk_rq_sectors(rq);
120 __entry->bytes = (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
121 blk_rq_bytes(rq) : 0;
122
123 blk_fill_rwbs(__entry->rwbs, rq->cmd_flags, blk_rq_bytes(rq));
124 blk_dump_cmd(__get_str(cmd), rq);
125 memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
126 ),
127
128 TP_printk("%d,%d %s %u (%s) %llu + %u [%s]",
129 MAJOR(__entry->dev), MINOR(__entry->dev),
130 __entry->rwbs, __entry->bytes, __get_str(cmd),
131 (unsigned long long)__entry->sector,
132 __entry->nr_sector, __entry->comm)
133);
134
135/**
136 * block_rq_insert - insert block operation request into queue
137 * @q: target queue
138 * @rq: block IO operation request
139 *
140 * Called immediately before block operation request @rq is inserted
141 * into queue @q. The fields in the operation request @rq struct can
142 * be examined to determine which device and sectors the pending
143 * operation would access.
144 */
145DEFINE_EVENT(block_rq, block_rq_insert,
146
147 TP_PROTO(struct request_queue *q, struct request *rq),
148
149 TP_ARGS(q, rq)
150);
151
152/**
153 * block_rq_issue - issue pending block IO request operation to device driver
154 * @q: queue holding operation
155 * @rq: block IO operation operation request
156 *
157 * Called when block operation request @rq from queue @q is sent to a
158 * device driver for processing.
159 */
160DEFINE_EVENT(block_rq, block_rq_issue,
161
162 TP_PROTO(struct request_queue *q, struct request *rq),
163
164 TP_ARGS(q, rq)
165);
166
167/**
168 * block_bio_bounce - used bounce buffer when processing block operation
169 * @q: queue holding the block operation
170 * @bio: block operation
171 *
172 * A bounce buffer was used to handle the block operation @bio in @q.
173 * This occurs when hardware limitations prevent a direct transfer of
174 * data between the @bio data memory area and the IO device. Use of a
175 * bounce buffer requires extra copying of data and decreases
176 * performance.
177 */
178TRACE_EVENT(block_bio_bounce,
179
180 TP_PROTO(struct request_queue *q, struct bio *bio),
181
182 TP_ARGS(q, bio),
183
184 TP_STRUCT__entry(
185 __field( dev_t, dev )
186 __field( sector_t, sector )
187 __field( unsigned int, nr_sector )
188 __array( char, rwbs, RWBS_LEN )
189 __array( char, comm, TASK_COMM_LEN )
190 ),
191
192 TP_fast_assign(
193 __entry->dev = bio->bi_bdev ?
194 bio->bi_bdev->bd_dev : 0;
195 __entry->sector = bio->bi_sector;
196 __entry->nr_sector = bio->bi_size >> 9;
197 blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_size);
198 memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
199 ),
200
201 TP_printk("%d,%d %s %llu + %u [%s]",
202 MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
203 (unsigned long long)__entry->sector,
204 __entry->nr_sector, __entry->comm)
205);
206
207/**
208 * block_bio_complete - completed all work on the block operation
209 * @q: queue holding the block operation
210 * @bio: block operation completed
211 * @error: io error value
212 *
213 * This tracepoint indicates there is no further work to do on this
214 * block IO operation @bio.
215 */
216TRACE_EVENT(block_bio_complete,
217
218 TP_PROTO(struct request_queue *q, struct bio *bio, int error),
219
220 TP_ARGS(q, bio, error),
221
222 TP_STRUCT__entry(
223 __field( dev_t, dev )
224 __field( sector_t, sector )
225 __field( unsigned, nr_sector )
226 __field( int, error )
227 __array( char, rwbs, RWBS_LEN)
228 ),
229
230 TP_fast_assign(
231 __entry->dev = bio->bi_bdev->bd_dev;
232 __entry->sector = bio->bi_sector;
233 __entry->nr_sector = bio->bi_size >> 9;
234 __entry->error = error;
235 blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_size);
236 ),
237
238 TP_printk("%d,%d %s %llu + %u [%d]",
239 MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
240 (unsigned long long)__entry->sector,
241 __entry->nr_sector, __entry->error)
242);
243
244DECLARE_EVENT_CLASS(block_bio,
245
246 TP_PROTO(struct request_queue *q, struct bio *bio),
247
248 TP_ARGS(q, bio),
249
250 TP_STRUCT__entry(
251 __field( dev_t, dev )
252 __field( sector_t, sector )
253 __field( unsigned int, nr_sector )
254 __array( char, rwbs, RWBS_LEN )
255 __array( char, comm, TASK_COMM_LEN )
256 ),
257
258 TP_fast_assign(
259 __entry->dev = bio->bi_bdev->bd_dev;
260 __entry->sector = bio->bi_sector;
261 __entry->nr_sector = bio->bi_size >> 9;
262 blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_size);
263 memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
264 ),
265
266 TP_printk("%d,%d %s %llu + %u [%s]",
267 MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
268 (unsigned long long)__entry->sector,
269 __entry->nr_sector, __entry->comm)
270);
271
272/**
273 * block_bio_backmerge - merging block operation to the end of an existing operation
274 * @q: queue holding operation
275 * @bio: new block operation to merge
276 *
277 * Merging block request @bio to the end of an existing block request
278 * in queue @q.
279 */
280DEFINE_EVENT(block_bio, block_bio_backmerge,
281
282 TP_PROTO(struct request_queue *q, struct bio *bio),
283
284 TP_ARGS(q, bio)
285);
286
287/**
288 * block_bio_frontmerge - merging block operation to the beginning of an existing operation
289 * @q: queue holding operation
290 * @bio: new block operation to merge
291 *
292 * Merging block IO operation @bio to the beginning of an existing block
293 * operation in queue @q.
294 */
295DEFINE_EVENT(block_bio, block_bio_frontmerge,
296
297 TP_PROTO(struct request_queue *q, struct bio *bio),
298
299 TP_ARGS(q, bio)
300);
301
302/**
303 * block_bio_queue - putting new block IO operation in queue
304 * @q: queue holding operation
305 * @bio: new block operation
306 *
307 * About to place the block IO operation @bio into queue @q.
308 */
309DEFINE_EVENT(block_bio, block_bio_queue,
310
311 TP_PROTO(struct request_queue *q, struct bio *bio),
312
313 TP_ARGS(q, bio)
314);
315
316DECLARE_EVENT_CLASS(block_get_rq,
317
318 TP_PROTO(struct request_queue *q, struct bio *bio, int rw),
319
320 TP_ARGS(q, bio, rw),
321
322 TP_STRUCT__entry(
323 __field( dev_t, dev )
324 __field( sector_t, sector )
325 __field( unsigned int, nr_sector )
326 __array( char, rwbs, RWBS_LEN )
327 __array( char, comm, TASK_COMM_LEN )
328 ),
329
330 TP_fast_assign(
331 __entry->dev = bio ? bio->bi_bdev->bd_dev : 0;
332 __entry->sector = bio ? bio->bi_sector : 0;
333 __entry->nr_sector = bio ? bio->bi_size >> 9 : 0;
334 blk_fill_rwbs(__entry->rwbs,
335 bio ? bio->bi_rw : 0, __entry->nr_sector);
336 memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
337 ),
338
339 TP_printk("%d,%d %s %llu + %u [%s]",
340 MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
341 (unsigned long long)__entry->sector,
342 __entry->nr_sector, __entry->comm)
343);
344
345/**
346 * block_getrq - get a free request entry in queue for block IO operations
347 * @q: queue for operations
348 * @bio: pending block IO operation
349 * @rw: low bit indicates a read (%0) or a write (%1)
350 *
351 * A request struct for queue @q has been allocated to handle the
352 * block IO operation @bio.
353 */
354DEFINE_EVENT(block_get_rq, block_getrq,
355
356 TP_PROTO(struct request_queue *q, struct bio *bio, int rw),
357
358 TP_ARGS(q, bio, rw)
359);
360
361/**
362 * block_sleeprq - waiting to get a free request entry in queue for block IO operation
363 * @q: queue for operation
364 * @bio: pending block IO operation
365 * @rw: low bit indicates a read (%0) or a write (%1)
366 *
367 * In the case where a request struct cannot be provided for queue @q
368 * the process needs to wait for an request struct to become
369 * available. This tracepoint event is generated each time the
370 * process goes to sleep waiting for request struct become available.
371 */
372DEFINE_EVENT(block_get_rq, block_sleeprq,
373
374 TP_PROTO(struct request_queue *q, struct bio *bio, int rw),
375
376 TP_ARGS(q, bio, rw)
377);
378
379/**
380 * block_plug - keep operations requests in request queue
381 * @q: request queue to plug
382 *
383 * Plug the request queue @q. Do not allow block operation requests
384 * to be sent to the device driver. Instead, accumulate requests in
385 * the queue to improve throughput performance of the block device.
386 */
387TRACE_EVENT(block_plug,
388
389 TP_PROTO(struct request_queue *q),
390
391 TP_ARGS(q),
392
393 TP_STRUCT__entry(
394 __array( char, comm, TASK_COMM_LEN )
395 ),
396
397 TP_fast_assign(
398 memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
399 ),
400
401 TP_printk("[%s]", __entry->comm)
402);
403
404DECLARE_EVENT_CLASS(block_unplug,
405
406 TP_PROTO(struct request_queue *q, unsigned int depth, bool explicit),
407
408 TP_ARGS(q, depth, explicit),
409
410 TP_STRUCT__entry(
411 __field( int, nr_rq )
412 __array( char, comm, TASK_COMM_LEN )
413 ),
414
415 TP_fast_assign(
416 __entry->nr_rq = depth;
417 memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
418 ),
419
420 TP_printk("[%s] %d", __entry->comm, __entry->nr_rq)
421);
422
423/**
424 * block_unplug - release of operations requests in request queue
425 * @q: request queue to unplug
426 * @depth: number of requests just added to the queue
427 * @explicit: whether this was an explicit unplug, or one from schedule()
428 *
429 * Unplug request queue @q because device driver is scheduled to work
430 * on elements in the request queue.
431 */
432DEFINE_EVENT(block_unplug, block_unplug,
433
434 TP_PROTO(struct request_queue *q, unsigned int depth, bool explicit),
435
436 TP_ARGS(q, depth, explicit)
437);
438
439/**
440 * block_split - split a single bio struct into two bio structs
441 * @q: queue containing the bio
442 * @bio: block operation being split
443 * @new_sector: The starting sector for the new bio
444 *
445 * The bio request @bio in request queue @q needs to be split into two
446 * bio requests. The newly created @bio request starts at
447 * @new_sector. This split may be required due to hardware limitation
448 * such as operation crossing device boundaries in a RAID system.
449 */
450TRACE_EVENT(block_split,
451
452 TP_PROTO(struct request_queue *q, struct bio *bio,
453 unsigned int new_sector),
454
455 TP_ARGS(q, bio, new_sector),
456
457 TP_STRUCT__entry(
458 __field( dev_t, dev )
459 __field( sector_t, sector )
460 __field( sector_t, new_sector )
461 __array( char, rwbs, RWBS_LEN )
462 __array( char, comm, TASK_COMM_LEN )
463 ),
464
465 TP_fast_assign(
466 __entry->dev = bio->bi_bdev->bd_dev;
467 __entry->sector = bio->bi_sector;
468 __entry->new_sector = new_sector;
469 blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_size);
470 memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
471 ),
472
473 TP_printk("%d,%d %s %llu / %llu [%s]",
474 MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
475 (unsigned long long)__entry->sector,
476 (unsigned long long)__entry->new_sector,
477 __entry->comm)
478);
479
480/**
481 * block_bio_remap - map request for a logical device to the raw device
482 * @q: queue holding the operation
483 * @bio: revised operation
484 * @dev: device for the operation
485 * @from: original sector for the operation
486 *
487 * An operation for a logical device has been mapped to the
488 * raw block device.
489 */
490TRACE_EVENT(block_bio_remap,
491
492 TP_PROTO(struct request_queue *q, struct bio *bio, dev_t dev,
493 sector_t from),
494
495 TP_ARGS(q, bio, dev, from),
496
497 TP_STRUCT__entry(
498 __field( dev_t, dev )
499 __field( sector_t, sector )
500 __field( unsigned int, nr_sector )
501 __field( dev_t, old_dev )
502 __field( sector_t, old_sector )
503 __array( char, rwbs, RWBS_LEN)
504 ),
505
506 TP_fast_assign(
507 __entry->dev = bio->bi_bdev->bd_dev;
508 __entry->sector = bio->bi_sector;
509 __entry->nr_sector = bio->bi_size >> 9;
510 __entry->old_dev = dev;
511 __entry->old_sector = from;
512 blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_size);
513 ),
514
515 TP_printk("%d,%d %s %llu + %u <- (%d,%d) %llu",
516 MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
517 (unsigned long long)__entry->sector,
518 __entry->nr_sector,
519 MAJOR(__entry->old_dev), MINOR(__entry->old_dev),
520 (unsigned long long)__entry->old_sector)
521);
522
523/**
524 * block_rq_remap - map request for a block operation request
525 * @q: queue holding the operation
526 * @rq: block IO operation request
527 * @dev: device for the operation
528 * @from: original sector for the operation
529 *
530 * The block operation request @rq in @q has been remapped. The block
531 * operation request @rq holds the current information and @from hold
532 * the original sector.
533 */
534TRACE_EVENT(block_rq_remap,
535
536 TP_PROTO(struct request_queue *q, struct request *rq, dev_t dev,
537 sector_t from),
538
539 TP_ARGS(q, rq, dev, from),
540
541 TP_STRUCT__entry(
542 __field( dev_t, dev )
543 __field( sector_t, sector )
544 __field( unsigned int, nr_sector )
545 __field( dev_t, old_dev )
546 __field( sector_t, old_sector )
547 __array( char, rwbs, RWBS_LEN)
548 ),
549
550 TP_fast_assign(
551 __entry->dev = disk_devt(rq->rq_disk);
552 __entry->sector = blk_rq_pos(rq);
553 __entry->nr_sector = blk_rq_sectors(rq);
554 __entry->old_dev = dev;
555 __entry->old_sector = from;
556 blk_fill_rwbs(__entry->rwbs, rq->cmd_flags, blk_rq_bytes(rq));
557 ),
558
559 TP_printk("%d,%d %s %llu + %u <- (%d,%d) %llu",
560 MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
561 (unsigned long long)__entry->sector,
562 __entry->nr_sector,
563 MAJOR(__entry->old_dev), MINOR(__entry->old_dev),
564 (unsigned long long)__entry->old_sector)
565);
566
567#endif /* _TRACE_BLOCK_H */
568
569/* This part must be outside protection */
570#include <trace/define_trace.h>
571
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/buffer_head.h>
10#include <linux/tracepoint.h>
11
12#define RWBS_LEN 8
13
14DECLARE_EVENT_CLASS(block_buffer,
15
16 TP_PROTO(struct buffer_head *bh),
17
18 TP_ARGS(bh),
19
20 TP_STRUCT__entry (
21 __field( dev_t, dev )
22 __field( sector_t, sector )
23 __field( size_t, size )
24 ),
25
26 TP_fast_assign(
27 __entry->dev = bh->b_bdev->bd_dev;
28 __entry->sector = bh->b_blocknr;
29 __entry->size = bh->b_size;
30 ),
31
32 TP_printk("%d,%d sector=%llu size=%zu",
33 MAJOR(__entry->dev), MINOR(__entry->dev),
34 (unsigned long long)__entry->sector, __entry->size
35 )
36);
37
38/**
39 * block_touch_buffer - mark a buffer accessed
40 * @bh: buffer_head being touched
41 *
42 * Called from touch_buffer().
43 */
44DEFINE_EVENT(block_buffer, block_touch_buffer,
45
46 TP_PROTO(struct buffer_head *bh),
47
48 TP_ARGS(bh)
49);
50
51/**
52 * block_dirty_buffer - mark a buffer dirty
53 * @bh: buffer_head being dirtied
54 *
55 * Called from mark_buffer_dirty().
56 */
57DEFINE_EVENT(block_buffer, block_dirty_buffer,
58
59 TP_PROTO(struct buffer_head *bh),
60
61 TP_ARGS(bh)
62);
63
64DECLARE_EVENT_CLASS(block_rq_with_error,
65
66 TP_PROTO(struct request_queue *q, struct request *rq),
67
68 TP_ARGS(q, rq),
69
70 TP_STRUCT__entry(
71 __field( dev_t, dev )
72 __field( sector_t, sector )
73 __field( unsigned int, nr_sector )
74 __field( int, errors )
75 __array( char, rwbs, RWBS_LEN )
76 __dynamic_array( char, cmd, blk_cmd_buf_len(rq) )
77 ),
78
79 TP_fast_assign(
80 __entry->dev = rq->rq_disk ? disk_devt(rq->rq_disk) : 0;
81 __entry->sector = (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
82 0 : blk_rq_pos(rq);
83 __entry->nr_sector = (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
84 0 : blk_rq_sectors(rq);
85 __entry->errors = rq->errors;
86
87 blk_fill_rwbs(__entry->rwbs, rq->cmd_flags, blk_rq_bytes(rq));
88 blk_dump_cmd(__get_str(cmd), rq);
89 ),
90
91 TP_printk("%d,%d %s (%s) %llu + %u [%d]",
92 MAJOR(__entry->dev), MINOR(__entry->dev),
93 __entry->rwbs, __get_str(cmd),
94 (unsigned long long)__entry->sector,
95 __entry->nr_sector, __entry->errors)
96);
97
98/**
99 * block_rq_abort - abort block operation request
100 * @q: queue containing the block operation request
101 * @rq: block IO operation request
102 *
103 * Called immediately after pending block IO operation request @rq in
104 * queue @q is aborted. The fields in the operation request @rq
105 * can be examined to determine which device and sectors the pending
106 * operation would access.
107 */
108DEFINE_EVENT(block_rq_with_error, block_rq_abort,
109
110 TP_PROTO(struct request_queue *q, struct request *rq),
111
112 TP_ARGS(q, rq)
113);
114
115/**
116 * block_rq_requeue - place block IO request back on a queue
117 * @q: queue holding operation
118 * @rq: block IO operation request
119 *
120 * The block operation request @rq is being placed back into queue
121 * @q. For some reason the request was not completed and needs to be
122 * put back in the queue.
123 */
124DEFINE_EVENT(block_rq_with_error, block_rq_requeue,
125
126 TP_PROTO(struct request_queue *q, struct request *rq),
127
128 TP_ARGS(q, rq)
129);
130
131/**
132 * block_rq_complete - block IO operation completed by device driver
133 * @q: queue containing the block operation request
134 * @rq: block operations request
135 * @nr_bytes: number of completed bytes
136 *
137 * The block_rq_complete tracepoint event indicates that some portion
138 * of operation request has been completed by the device driver. If
139 * the @rq->bio is %NULL, then there is absolutely no additional work to
140 * do for the request. If @rq->bio is non-NULL then there is
141 * additional work required to complete the request.
142 */
143TRACE_EVENT(block_rq_complete,
144
145 TP_PROTO(struct request_queue *q, struct request *rq,
146 unsigned int nr_bytes),
147
148 TP_ARGS(q, rq, nr_bytes),
149
150 TP_STRUCT__entry(
151 __field( dev_t, dev )
152 __field( sector_t, sector )
153 __field( unsigned int, nr_sector )
154 __field( int, errors )
155 __array( char, rwbs, RWBS_LEN )
156 __dynamic_array( char, cmd, blk_cmd_buf_len(rq) )
157 ),
158
159 TP_fast_assign(
160 __entry->dev = rq->rq_disk ? disk_devt(rq->rq_disk) : 0;
161 __entry->sector = blk_rq_pos(rq);
162 __entry->nr_sector = nr_bytes >> 9;
163 __entry->errors = rq->errors;
164
165 blk_fill_rwbs(__entry->rwbs, rq->cmd_flags, nr_bytes);
166 blk_dump_cmd(__get_str(cmd), rq);
167 ),
168
169 TP_printk("%d,%d %s (%s) %llu + %u [%d]",
170 MAJOR(__entry->dev), MINOR(__entry->dev),
171 __entry->rwbs, __get_str(cmd),
172 (unsigned long long)__entry->sector,
173 __entry->nr_sector, __entry->errors)
174);
175
176DECLARE_EVENT_CLASS(block_rq,
177
178 TP_PROTO(struct request_queue *q, struct request *rq),
179
180 TP_ARGS(q, rq),
181
182 TP_STRUCT__entry(
183 __field( dev_t, dev )
184 __field( sector_t, sector )
185 __field( unsigned int, nr_sector )
186 __field( unsigned int, bytes )
187 __array( char, rwbs, RWBS_LEN )
188 __array( char, comm, TASK_COMM_LEN )
189 __dynamic_array( char, cmd, blk_cmd_buf_len(rq) )
190 ),
191
192 TP_fast_assign(
193 __entry->dev = rq->rq_disk ? disk_devt(rq->rq_disk) : 0;
194 __entry->sector = (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
195 0 : blk_rq_pos(rq);
196 __entry->nr_sector = (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
197 0 : blk_rq_sectors(rq);
198 __entry->bytes = (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
199 blk_rq_bytes(rq) : 0;
200
201 blk_fill_rwbs(__entry->rwbs, rq->cmd_flags, blk_rq_bytes(rq));
202 blk_dump_cmd(__get_str(cmd), rq);
203 memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
204 ),
205
206 TP_printk("%d,%d %s %u (%s) %llu + %u [%s]",
207 MAJOR(__entry->dev), MINOR(__entry->dev),
208 __entry->rwbs, __entry->bytes, __get_str(cmd),
209 (unsigned long long)__entry->sector,
210 __entry->nr_sector, __entry->comm)
211);
212
213/**
214 * block_rq_insert - insert block operation request into queue
215 * @q: target queue
216 * @rq: block IO operation request
217 *
218 * Called immediately before block operation request @rq is inserted
219 * into queue @q. The fields in the operation request @rq struct can
220 * be examined to determine which device and sectors the pending
221 * operation would access.
222 */
223DEFINE_EVENT(block_rq, block_rq_insert,
224
225 TP_PROTO(struct request_queue *q, struct request *rq),
226
227 TP_ARGS(q, rq)
228);
229
230/**
231 * block_rq_issue - issue pending block IO request operation to device driver
232 * @q: queue holding operation
233 * @rq: block IO operation operation request
234 *
235 * Called when block operation request @rq from queue @q is sent to a
236 * device driver for processing.
237 */
238DEFINE_EVENT(block_rq, block_rq_issue,
239
240 TP_PROTO(struct request_queue *q, struct request *rq),
241
242 TP_ARGS(q, rq)
243);
244
245/**
246 * block_bio_bounce - used bounce buffer when processing block operation
247 * @q: queue holding the block operation
248 * @bio: block operation
249 *
250 * A bounce buffer was used to handle the block operation @bio in @q.
251 * This occurs when hardware limitations prevent a direct transfer of
252 * data between the @bio data memory area and the IO device. Use of a
253 * bounce buffer requires extra copying of data and decreases
254 * performance.
255 */
256TRACE_EVENT(block_bio_bounce,
257
258 TP_PROTO(struct request_queue *q, struct bio *bio),
259
260 TP_ARGS(q, bio),
261
262 TP_STRUCT__entry(
263 __field( dev_t, dev )
264 __field( sector_t, sector )
265 __field( unsigned int, nr_sector )
266 __array( char, rwbs, RWBS_LEN )
267 __array( char, comm, TASK_COMM_LEN )
268 ),
269
270 TP_fast_assign(
271 __entry->dev = bio->bi_bdev ?
272 bio->bi_bdev->bd_dev : 0;
273 __entry->sector = bio->bi_iter.bi_sector;
274 __entry->nr_sector = bio_sectors(bio);
275 blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_iter.bi_size);
276 memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
277 ),
278
279 TP_printk("%d,%d %s %llu + %u [%s]",
280 MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
281 (unsigned long long)__entry->sector,
282 __entry->nr_sector, __entry->comm)
283);
284
285/**
286 * block_bio_complete - completed all work on the block operation
287 * @q: queue holding the block operation
288 * @bio: block operation completed
289 * @error: io error value
290 *
291 * This tracepoint indicates there is no further work to do on this
292 * block IO operation @bio.
293 */
294TRACE_EVENT(block_bio_complete,
295
296 TP_PROTO(struct request_queue *q, struct bio *bio, int error),
297
298 TP_ARGS(q, bio, error),
299
300 TP_STRUCT__entry(
301 __field( dev_t, dev )
302 __field( sector_t, sector )
303 __field( unsigned, nr_sector )
304 __field( int, error )
305 __array( char, rwbs, RWBS_LEN)
306 ),
307
308 TP_fast_assign(
309 __entry->dev = bio->bi_bdev->bd_dev;
310 __entry->sector = bio->bi_iter.bi_sector;
311 __entry->nr_sector = bio_sectors(bio);
312 __entry->error = error;
313 blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_iter.bi_size);
314 ),
315
316 TP_printk("%d,%d %s %llu + %u [%d]",
317 MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
318 (unsigned long long)__entry->sector,
319 __entry->nr_sector, __entry->error)
320);
321
322DECLARE_EVENT_CLASS(block_bio_merge,
323
324 TP_PROTO(struct request_queue *q, struct request *rq, struct bio *bio),
325
326 TP_ARGS(q, rq, bio),
327
328 TP_STRUCT__entry(
329 __field( dev_t, dev )
330 __field( sector_t, sector )
331 __field( unsigned int, nr_sector )
332 __array( char, rwbs, RWBS_LEN )
333 __array( char, comm, TASK_COMM_LEN )
334 ),
335
336 TP_fast_assign(
337 __entry->dev = bio->bi_bdev->bd_dev;
338 __entry->sector = bio->bi_iter.bi_sector;
339 __entry->nr_sector = bio_sectors(bio);
340 blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_iter.bi_size);
341 memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
342 ),
343
344 TP_printk("%d,%d %s %llu + %u [%s]",
345 MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
346 (unsigned long long)__entry->sector,
347 __entry->nr_sector, __entry->comm)
348);
349
350/**
351 * block_bio_backmerge - merging block operation to the end of an existing operation
352 * @q: queue holding operation
353 * @rq: request bio is being merged into
354 * @bio: new block operation to merge
355 *
356 * Merging block request @bio to the end of an existing block request
357 * in queue @q.
358 */
359DEFINE_EVENT(block_bio_merge, block_bio_backmerge,
360
361 TP_PROTO(struct request_queue *q, struct request *rq, struct bio *bio),
362
363 TP_ARGS(q, rq, bio)
364);
365
366/**
367 * block_bio_frontmerge - merging block operation to the beginning of an existing operation
368 * @q: queue holding operation
369 * @rq: request bio is being merged into
370 * @bio: new block operation to merge
371 *
372 * Merging block IO operation @bio to the beginning of an existing block
373 * operation in queue @q.
374 */
375DEFINE_EVENT(block_bio_merge, block_bio_frontmerge,
376
377 TP_PROTO(struct request_queue *q, struct request *rq, struct bio *bio),
378
379 TP_ARGS(q, rq, bio)
380);
381
382/**
383 * block_bio_queue - putting new block IO operation in queue
384 * @q: queue holding operation
385 * @bio: new block operation
386 *
387 * About to place the block IO operation @bio into queue @q.
388 */
389TRACE_EVENT(block_bio_queue,
390
391 TP_PROTO(struct request_queue *q, struct bio *bio),
392
393 TP_ARGS(q, bio),
394
395 TP_STRUCT__entry(
396 __field( dev_t, dev )
397 __field( sector_t, sector )
398 __field( unsigned int, nr_sector )
399 __array( char, rwbs, RWBS_LEN )
400 __array( char, comm, TASK_COMM_LEN )
401 ),
402
403 TP_fast_assign(
404 __entry->dev = bio->bi_bdev->bd_dev;
405 __entry->sector = bio->bi_iter.bi_sector;
406 __entry->nr_sector = bio_sectors(bio);
407 blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_iter.bi_size);
408 memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
409 ),
410
411 TP_printk("%d,%d %s %llu + %u [%s]",
412 MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
413 (unsigned long long)__entry->sector,
414 __entry->nr_sector, __entry->comm)
415);
416
417DECLARE_EVENT_CLASS(block_get_rq,
418
419 TP_PROTO(struct request_queue *q, struct bio *bio, int rw),
420
421 TP_ARGS(q, bio, rw),
422
423 TP_STRUCT__entry(
424 __field( dev_t, dev )
425 __field( sector_t, sector )
426 __field( unsigned int, nr_sector )
427 __array( char, rwbs, RWBS_LEN )
428 __array( char, comm, TASK_COMM_LEN )
429 ),
430
431 TP_fast_assign(
432 __entry->dev = bio ? bio->bi_bdev->bd_dev : 0;
433 __entry->sector = bio ? bio->bi_iter.bi_sector : 0;
434 __entry->nr_sector = bio ? bio_sectors(bio) : 0;
435 blk_fill_rwbs(__entry->rwbs,
436 bio ? bio->bi_rw : 0, __entry->nr_sector);
437 memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
438 ),
439
440 TP_printk("%d,%d %s %llu + %u [%s]",
441 MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
442 (unsigned long long)__entry->sector,
443 __entry->nr_sector, __entry->comm)
444);
445
446/**
447 * block_getrq - get a free request entry in queue for block IO operations
448 * @q: queue for operations
449 * @bio: pending block IO operation
450 * @rw: low bit indicates a read (%0) or a write (%1)
451 *
452 * A request struct for queue @q has been allocated to handle the
453 * block IO operation @bio.
454 */
455DEFINE_EVENT(block_get_rq, block_getrq,
456
457 TP_PROTO(struct request_queue *q, struct bio *bio, int rw),
458
459 TP_ARGS(q, bio, rw)
460);
461
462/**
463 * block_sleeprq - waiting to get a free request entry in queue for block IO operation
464 * @q: queue for operation
465 * @bio: pending block IO operation
466 * @rw: low bit indicates a read (%0) or a write (%1)
467 *
468 * In the case where a request struct cannot be provided for queue @q
469 * the process needs to wait for an request struct to become
470 * available. This tracepoint event is generated each time the
471 * process goes to sleep waiting for request struct become available.
472 */
473DEFINE_EVENT(block_get_rq, block_sleeprq,
474
475 TP_PROTO(struct request_queue *q, struct bio *bio, int rw),
476
477 TP_ARGS(q, bio, rw)
478);
479
480/**
481 * block_plug - keep operations requests in request queue
482 * @q: request queue to plug
483 *
484 * Plug the request queue @q. Do not allow block operation requests
485 * to be sent to the device driver. Instead, accumulate requests in
486 * the queue to improve throughput performance of the block device.
487 */
488TRACE_EVENT(block_plug,
489
490 TP_PROTO(struct request_queue *q),
491
492 TP_ARGS(q),
493
494 TP_STRUCT__entry(
495 __array( char, comm, TASK_COMM_LEN )
496 ),
497
498 TP_fast_assign(
499 memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
500 ),
501
502 TP_printk("[%s]", __entry->comm)
503);
504
505DECLARE_EVENT_CLASS(block_unplug,
506
507 TP_PROTO(struct request_queue *q, unsigned int depth, bool explicit),
508
509 TP_ARGS(q, depth, explicit),
510
511 TP_STRUCT__entry(
512 __field( int, nr_rq )
513 __array( char, comm, TASK_COMM_LEN )
514 ),
515
516 TP_fast_assign(
517 __entry->nr_rq = depth;
518 memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
519 ),
520
521 TP_printk("[%s] %d", __entry->comm, __entry->nr_rq)
522);
523
524/**
525 * block_unplug - release of operations requests in request queue
526 * @q: request queue to unplug
527 * @depth: number of requests just added to the queue
528 * @explicit: whether this was an explicit unplug, or one from schedule()
529 *
530 * Unplug request queue @q because device driver is scheduled to work
531 * on elements in the request queue.
532 */
533DEFINE_EVENT(block_unplug, block_unplug,
534
535 TP_PROTO(struct request_queue *q, unsigned int depth, bool explicit),
536
537 TP_ARGS(q, depth, explicit)
538);
539
540/**
541 * block_split - split a single bio struct into two bio structs
542 * @q: queue containing the bio
543 * @bio: block operation being split
544 * @new_sector: The starting sector for the new bio
545 *
546 * The bio request @bio in request queue @q needs to be split into two
547 * bio requests. The newly created @bio request starts at
548 * @new_sector. This split may be required due to hardware limitation
549 * such as operation crossing device boundaries in a RAID system.
550 */
551TRACE_EVENT(block_split,
552
553 TP_PROTO(struct request_queue *q, struct bio *bio,
554 unsigned int new_sector),
555
556 TP_ARGS(q, bio, new_sector),
557
558 TP_STRUCT__entry(
559 __field( dev_t, dev )
560 __field( sector_t, sector )
561 __field( sector_t, new_sector )
562 __array( char, rwbs, RWBS_LEN )
563 __array( char, comm, TASK_COMM_LEN )
564 ),
565
566 TP_fast_assign(
567 __entry->dev = bio->bi_bdev->bd_dev;
568 __entry->sector = bio->bi_iter.bi_sector;
569 __entry->new_sector = new_sector;
570 blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_iter.bi_size);
571 memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
572 ),
573
574 TP_printk("%d,%d %s %llu / %llu [%s]",
575 MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
576 (unsigned long long)__entry->sector,
577 (unsigned long long)__entry->new_sector,
578 __entry->comm)
579);
580
581/**
582 * block_bio_remap - map request for a logical device to the raw device
583 * @q: queue holding the operation
584 * @bio: revised operation
585 * @dev: device for the operation
586 * @from: original sector for the operation
587 *
588 * An operation for a logical device has been mapped to the
589 * raw block device.
590 */
591TRACE_EVENT(block_bio_remap,
592
593 TP_PROTO(struct request_queue *q, struct bio *bio, dev_t dev,
594 sector_t from),
595
596 TP_ARGS(q, bio, dev, from),
597
598 TP_STRUCT__entry(
599 __field( dev_t, dev )
600 __field( sector_t, sector )
601 __field( unsigned int, nr_sector )
602 __field( dev_t, old_dev )
603 __field( sector_t, old_sector )
604 __array( char, rwbs, RWBS_LEN)
605 ),
606
607 TP_fast_assign(
608 __entry->dev = bio->bi_bdev->bd_dev;
609 __entry->sector = bio->bi_iter.bi_sector;
610 __entry->nr_sector = bio_sectors(bio);
611 __entry->old_dev = dev;
612 __entry->old_sector = from;
613 blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_iter.bi_size);
614 ),
615
616 TP_printk("%d,%d %s %llu + %u <- (%d,%d) %llu",
617 MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
618 (unsigned long long)__entry->sector,
619 __entry->nr_sector,
620 MAJOR(__entry->old_dev), MINOR(__entry->old_dev),
621 (unsigned long long)__entry->old_sector)
622);
623
624/**
625 * block_rq_remap - map request for a block operation request
626 * @q: queue holding the operation
627 * @rq: block IO operation request
628 * @dev: device for the operation
629 * @from: original sector for the operation
630 *
631 * The block operation request @rq in @q has been remapped. The block
632 * operation request @rq holds the current information and @from hold
633 * the original sector.
634 */
635TRACE_EVENT(block_rq_remap,
636
637 TP_PROTO(struct request_queue *q, struct request *rq, dev_t dev,
638 sector_t from),
639
640 TP_ARGS(q, rq, dev, from),
641
642 TP_STRUCT__entry(
643 __field( dev_t, dev )
644 __field( sector_t, sector )
645 __field( unsigned int, nr_sector )
646 __field( dev_t, old_dev )
647 __field( sector_t, old_sector )
648 __field( unsigned int, nr_bios )
649 __array( char, rwbs, RWBS_LEN)
650 ),
651
652 TP_fast_assign(
653 __entry->dev = disk_devt(rq->rq_disk);
654 __entry->sector = blk_rq_pos(rq);
655 __entry->nr_sector = blk_rq_sectors(rq);
656 __entry->old_dev = dev;
657 __entry->old_sector = from;
658 __entry->nr_bios = blk_rq_count_bios(rq);
659 blk_fill_rwbs(__entry->rwbs, rq->cmd_flags, blk_rq_bytes(rq));
660 ),
661
662 TP_printk("%d,%d %s %llu + %u <- (%d,%d) %llu %u",
663 MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
664 (unsigned long long)__entry->sector,
665 __entry->nr_sector,
666 MAJOR(__entry->old_dev), MINOR(__entry->old_dev),
667 (unsigned long long)__entry->old_sector, __entry->nr_bios)
668);
669
670#endif /* _TRACE_BLOCK_H */
671
672/* This part must be outside protection */
673#include <trace/define_trace.h>
674