2 #define TRACE_SYSTEM block
4 #if !defined(_TRACE_BLOCK_H) || defined(TRACE_HEADER_MULTI_READ)
7 #include <linux/blktrace_api.h>
8 #include <linux/blkdev.h>
9 #include <linux/buffer_head.h>
10 #include <linux/tracepoint.h>
14 DECLARE_EVENT_CLASS(block_buffer,
16 TP_PROTO(struct buffer_head *bh),
22 __field( sector_t, sector )
23 __field( size_t, size )
27 __entry->dev = bh->b_bdev->bd_dev;
28 __entry->sector = bh->b_blocknr;
29 __entry->size = bh->b_size;
32 TP_printk("%d,%d sector=%llu size=%zu",
33 MAJOR(__entry->dev), MINOR(__entry->dev),
34 (unsigned long long)__entry->sector, __entry->size
39 * block_touch_buffer - mark a buffer accessed
40 * @bh: buffer_head being touched
42 * Called from touch_buffer().
44 DEFINE_EVENT(block_buffer, block_touch_buffer,
46 TP_PROTO(struct buffer_head *bh),
52 * block_dirty_buffer - mark a buffer dirty
53 * @bh: buffer_head being dirtied
55 * Called from mark_buffer_dirty().
57 DEFINE_EVENT(block_buffer, block_dirty_buffer,
59 TP_PROTO(struct buffer_head *bh),
64 DECLARE_EVENT_CLASS(block_rq_with_error,
66 TP_PROTO(struct request_queue *q, struct request *rq),
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) )
80 __entry->dev = rq->rq_disk ? disk_devt(rq->rq_disk) : 0;
81 __entry->sector = (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
83 __entry->nr_sector = (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
84 0 : blk_rq_sectors(rq);
85 __entry->errors = rq->errors;
87 blk_fill_rwbs(__entry->rwbs, rq->cmd_flags, blk_rq_bytes(rq));
88 blk_dump_cmd(__get_str(cmd), rq);
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)
99 * block_rq_abort - abort block operation request
100 * @q: queue containing the block operation request
101 * @rq: block IO operation request
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.
108 DEFINE_EVENT(block_rq_with_error, block_rq_abort,
110 TP_PROTO(struct request_queue *q, struct request *rq),
116 * block_rq_requeue - place block IO request back on a queue
117 * @q: queue holding operation
118 * @rq: block IO operation request
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.
124 DEFINE_EVENT(block_rq_with_error, block_rq_requeue,
126 TP_PROTO(struct request_queue *q, struct request *rq),
132 * block_rq_complete - block IO operation completed by device driver
133 * @q: queue containing the block operation request
134 * @rq: block operations request
136 * The block_rq_complete tracepoint event indicates that some portion
137 * of operation request has been completed by the device driver. If
138 * the @rq->bio is %NULL, then there is absolutely no additional work to
139 * do for the request. If @rq->bio is non-NULL then there is
140 * additional work required to complete the request.
142 DEFINE_EVENT(block_rq_with_error, block_rq_complete,
144 TP_PROTO(struct request_queue *q, struct request *rq),
149 DECLARE_EVENT_CLASS(block_rq,
151 TP_PROTO(struct request_queue *q, struct request *rq),
156 __field( dev_t, dev )
157 __field( sector_t, sector )
158 __field( unsigned int, nr_sector )
159 __field( unsigned int, bytes )
160 __array( char, rwbs, RWBS_LEN )
161 __array( char, comm, TASK_COMM_LEN )
162 __dynamic_array( char, cmd, blk_cmd_buf_len(rq) )
166 __entry->dev = rq->rq_disk ? disk_devt(rq->rq_disk) : 0;
167 __entry->sector = (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
169 __entry->nr_sector = (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
170 0 : blk_rq_sectors(rq);
171 __entry->bytes = (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
172 blk_rq_bytes(rq) : 0;
174 blk_fill_rwbs(__entry->rwbs, rq->cmd_flags, blk_rq_bytes(rq));
175 blk_dump_cmd(__get_str(cmd), rq);
176 memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
179 TP_printk("%d,%d %s %u (%s) %llu + %u [%s]",
180 MAJOR(__entry->dev), MINOR(__entry->dev),
181 __entry->rwbs, __entry->bytes, __get_str(cmd),
182 (unsigned long long)__entry->sector,
183 __entry->nr_sector, __entry->comm)
187 * block_rq_insert - insert block operation request into queue
189 * @rq: block IO operation request
191 * Called immediately before block operation request @rq is inserted
192 * into queue @q. The fields in the operation request @rq struct can
193 * be examined to determine which device and sectors the pending
194 * operation would access.
196 DEFINE_EVENT(block_rq, block_rq_insert,
198 TP_PROTO(struct request_queue *q, struct request *rq),
204 * block_rq_issue - issue pending block IO request operation to device driver
205 * @q: queue holding operation
206 * @rq: block IO operation operation request
208 * Called when block operation request @rq from queue @q is sent to a
209 * device driver for processing.
211 DEFINE_EVENT(block_rq, block_rq_issue,
213 TP_PROTO(struct request_queue *q, struct request *rq),
219 * block_bio_bounce - used bounce buffer when processing block operation
220 * @q: queue holding the block operation
221 * @bio: block operation
223 * A bounce buffer was used to handle the block operation @bio in @q.
224 * This occurs when hardware limitations prevent a direct transfer of
225 * data between the @bio data memory area and the IO device. Use of a
226 * bounce buffer requires extra copying of data and decreases
229 TRACE_EVENT(block_bio_bounce,
231 TP_PROTO(struct request_queue *q, struct bio *bio),
236 __field( dev_t, dev )
237 __field( sector_t, sector )
238 __field( unsigned int, nr_sector )
239 __array( char, rwbs, RWBS_LEN )
240 __array( char, comm, TASK_COMM_LEN )
244 __entry->dev = bio->bi_bdev ?
245 bio->bi_bdev->bd_dev : 0;
246 __entry->sector = bio->bi_iter.bi_sector;
247 __entry->nr_sector = bio_sectors(bio);
248 blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_iter.bi_size);
249 memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
252 TP_printk("%d,%d %s %llu + %u [%s]",
253 MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
254 (unsigned long long)__entry->sector,
255 __entry->nr_sector, __entry->comm)
259 * block_bio_complete - completed all work on the block operation
260 * @q: queue holding the block operation
261 * @bio: block operation completed
262 * @error: io error value
264 * This tracepoint indicates there is no further work to do on this
265 * block IO operation @bio.
267 TRACE_EVENT(block_bio_complete,
269 TP_PROTO(struct request_queue *q, struct bio *bio, int error),
271 TP_ARGS(q, bio, error),
274 __field( dev_t, dev )
275 __field( sector_t, sector )
276 __field( unsigned, nr_sector )
277 __field( int, error )
278 __array( char, rwbs, RWBS_LEN)
282 __entry->dev = bio->bi_bdev->bd_dev;
283 __entry->sector = bio->bi_iter.bi_sector;
284 __entry->nr_sector = bio_sectors(bio);
285 __entry->error = error;
286 blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_iter.bi_size);
289 TP_printk("%d,%d %s %llu + %u [%d]",
290 MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
291 (unsigned long long)__entry->sector,
292 __entry->nr_sector, __entry->error)
295 DECLARE_EVENT_CLASS(block_bio_merge,
297 TP_PROTO(struct request_queue *q, struct request *rq, struct bio *bio),
302 __field( dev_t, dev )
303 __field( sector_t, sector )
304 __field( unsigned int, nr_sector )
305 __array( char, rwbs, RWBS_LEN )
306 __array( char, comm, TASK_COMM_LEN )
310 __entry->dev = bio->bi_bdev->bd_dev;
311 __entry->sector = bio->bi_iter.bi_sector;
312 __entry->nr_sector = bio_sectors(bio);
313 blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_iter.bi_size);
314 memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
317 TP_printk("%d,%d %s %llu + %u [%s]",
318 MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
319 (unsigned long long)__entry->sector,
320 __entry->nr_sector, __entry->comm)
324 * block_bio_backmerge - merging block operation to the end of an existing operation
325 * @q: queue holding operation
326 * @rq: request bio is being merged into
327 * @bio: new block operation to merge
329 * Merging block request @bio to the end of an existing block request
332 DEFINE_EVENT(block_bio_merge, block_bio_backmerge,
334 TP_PROTO(struct request_queue *q, struct request *rq, struct bio *bio),
340 * block_bio_frontmerge - merging block operation to the beginning of an existing operation
341 * @q: queue holding operation
342 * @rq: request bio is being merged into
343 * @bio: new block operation to merge
345 * Merging block IO operation @bio to the beginning of an existing block
346 * operation in queue @q.
348 DEFINE_EVENT(block_bio_merge, block_bio_frontmerge,
350 TP_PROTO(struct request_queue *q, struct request *rq, struct bio *bio),
356 * block_bio_queue - putting new block IO operation in queue
357 * @q: queue holding operation
358 * @bio: new block operation
360 * About to place the block IO operation @bio into queue @q.
362 TRACE_EVENT(block_bio_queue,
364 TP_PROTO(struct request_queue *q, struct bio *bio),
369 __field( dev_t, dev )
370 __field( sector_t, sector )
371 __field( unsigned int, nr_sector )
372 __array( char, rwbs, RWBS_LEN )
373 __array( char, comm, TASK_COMM_LEN )
377 __entry->dev = bio->bi_bdev->bd_dev;
378 __entry->sector = bio->bi_iter.bi_sector;
379 __entry->nr_sector = bio_sectors(bio);
380 blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_iter.bi_size);
381 memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
384 TP_printk("%d,%d %s %llu + %u [%s]",
385 MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
386 (unsigned long long)__entry->sector,
387 __entry->nr_sector, __entry->comm)
390 DECLARE_EVENT_CLASS(block_get_rq,
392 TP_PROTO(struct request_queue *q, struct bio *bio, int rw),
397 __field( dev_t, dev )
398 __field( sector_t, sector )
399 __field( unsigned int, nr_sector )
400 __array( char, rwbs, RWBS_LEN )
401 __array( char, comm, TASK_COMM_LEN )
405 __entry->dev = bio ? bio->bi_bdev->bd_dev : 0;
406 __entry->sector = bio ? bio->bi_iter.bi_sector : 0;
407 __entry->nr_sector = bio ? bio_sectors(bio) : 0;
408 blk_fill_rwbs(__entry->rwbs,
409 bio ? bio->bi_rw : 0, __entry->nr_sector);
410 memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
413 TP_printk("%d,%d %s %llu + %u [%s]",
414 MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
415 (unsigned long long)__entry->sector,
416 __entry->nr_sector, __entry->comm)
420 * block_getrq - get a free request entry in queue for block IO operations
421 * @q: queue for operations
422 * @bio: pending block IO operation
423 * @rw: low bit indicates a read (%0) or a write (%1)
425 * A request struct for queue @q has been allocated to handle the
426 * block IO operation @bio.
428 DEFINE_EVENT(block_get_rq, block_getrq,
430 TP_PROTO(struct request_queue *q, struct bio *bio, int rw),
436 * block_sleeprq - waiting to get a free request entry in queue for block IO operation
437 * @q: queue for operation
438 * @bio: pending block IO operation
439 * @rw: low bit indicates a read (%0) or a write (%1)
441 * In the case where a request struct cannot be provided for queue @q
442 * the process needs to wait for an request struct to become
443 * available. This tracepoint event is generated each time the
444 * process goes to sleep waiting for request struct become available.
446 DEFINE_EVENT(block_get_rq, block_sleeprq,
448 TP_PROTO(struct request_queue *q, struct bio *bio, int rw),
454 * block_plug - keep operations requests in request queue
455 * @q: request queue to plug
457 * Plug the request queue @q. Do not allow block operation requests
458 * to be sent to the device driver. Instead, accumulate requests in
459 * the queue to improve throughput performance of the block device.
461 TRACE_EVENT(block_plug,
463 TP_PROTO(struct request_queue *q),
468 __array( char, comm, TASK_COMM_LEN )
472 memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
475 TP_printk("[%s]", __entry->comm)
478 DECLARE_EVENT_CLASS(block_unplug,
480 TP_PROTO(struct request_queue *q, unsigned int depth, bool explicit),
482 TP_ARGS(q, depth, explicit),
485 __field( int, nr_rq )
486 __array( char, comm, TASK_COMM_LEN )
490 __entry->nr_rq = depth;
491 memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
494 TP_printk("[%s] %d", __entry->comm, __entry->nr_rq)
498 * block_unplug - release of operations requests in request queue
499 * @q: request queue to unplug
500 * @depth: number of requests just added to the queue
501 * @explicit: whether this was an explicit unplug, or one from schedule()
503 * Unplug request queue @q because device driver is scheduled to work
504 * on elements in the request queue.
506 DEFINE_EVENT(block_unplug, block_unplug,
508 TP_PROTO(struct request_queue *q, unsigned int depth, bool explicit),
510 TP_ARGS(q, depth, explicit)
514 * block_split - split a single bio struct into two bio structs
515 * @q: queue containing the bio
516 * @bio: block operation being split
517 * @new_sector: The starting sector for the new bio
519 * The bio request @bio in request queue @q needs to be split into two
520 * bio requests. The newly created @bio request starts at
521 * @new_sector. This split may be required due to hardware limitation
522 * such as operation crossing device boundaries in a RAID system.
524 TRACE_EVENT(block_split,
526 TP_PROTO(struct request_queue *q, struct bio *bio,
527 unsigned int new_sector),
529 TP_ARGS(q, bio, new_sector),
532 __field( dev_t, dev )
533 __field( sector_t, sector )
534 __field( sector_t, new_sector )
535 __array( char, rwbs, RWBS_LEN )
536 __array( char, comm, TASK_COMM_LEN )
540 __entry->dev = bio->bi_bdev->bd_dev;
541 __entry->sector = bio->bi_iter.bi_sector;
542 __entry->new_sector = new_sector;
543 blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_iter.bi_size);
544 memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
547 TP_printk("%d,%d %s %llu / %llu [%s]",
548 MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
549 (unsigned long long)__entry->sector,
550 (unsigned long long)__entry->new_sector,
555 * block_bio_remap - map request for a logical device to the raw device
556 * @q: queue holding the operation
557 * @bio: revised operation
558 * @dev: device for the operation
559 * @from: original sector for the operation
561 * An operation for a logical device has been mapped to the
564 TRACE_EVENT(block_bio_remap,
566 TP_PROTO(struct request_queue *q, struct bio *bio, dev_t dev,
569 TP_ARGS(q, bio, dev, from),
572 __field( dev_t, dev )
573 __field( sector_t, sector )
574 __field( unsigned int, nr_sector )
575 __field( dev_t, old_dev )
576 __field( sector_t, old_sector )
577 __array( char, rwbs, RWBS_LEN)
581 __entry->dev = bio->bi_bdev->bd_dev;
582 __entry->sector = bio->bi_iter.bi_sector;
583 __entry->nr_sector = bio_sectors(bio);
584 __entry->old_dev = dev;
585 __entry->old_sector = from;
586 blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_iter.bi_size);
589 TP_printk("%d,%d %s %llu + %u <- (%d,%d) %llu",
590 MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
591 (unsigned long long)__entry->sector,
593 MAJOR(__entry->old_dev), MINOR(__entry->old_dev),
594 (unsigned long long)__entry->old_sector)
598 * block_rq_remap - map request for a block operation request
599 * @q: queue holding the operation
600 * @rq: block IO operation request
601 * @dev: device for the operation
602 * @from: original sector for the operation
604 * The block operation request @rq in @q has been remapped. The block
605 * operation request @rq holds the current information and @from hold
606 * the original sector.
608 TRACE_EVENT(block_rq_remap,
610 TP_PROTO(struct request_queue *q, struct request *rq, dev_t dev,
613 TP_ARGS(q, rq, dev, from),
616 __field( dev_t, dev )
617 __field( sector_t, sector )
618 __field( unsigned int, nr_sector )
619 __field( dev_t, old_dev )
620 __field( sector_t, old_sector )
621 __field( unsigned int, nr_bios )
622 __array( char, rwbs, RWBS_LEN)
626 __entry->dev = disk_devt(rq->rq_disk);
627 __entry->sector = blk_rq_pos(rq);
628 __entry->nr_sector = blk_rq_sectors(rq);
629 __entry->old_dev = dev;
630 __entry->old_sector = from;
631 __entry->nr_bios = blk_rq_count_bios(rq);
632 blk_fill_rwbs(__entry->rwbs, rq->cmd_flags, blk_rq_bytes(rq));
635 TP_printk("%d,%d %s %llu + %u <- (%d,%d) %llu %u",
636 MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
637 (unsigned long long)__entry->sector,
639 MAJOR(__entry->old_dev), MINOR(__entry->old_dev),
640 (unsigned long long)__entry->old_sector, __entry->nr_bios)
643 #endif /* _TRACE_BLOCK_H */
645 /* This part must be outside protection */
646 #include <trace/define_trace.h>