1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #undef TRACE_SYSTEM 3 #define TRACE_SYSTEM block 4 5 #if !defined(_TRACE_BLOCK_H) || defined(TRACE_HEADER_MULTI_READ) 6 #define _TRACE_BLOCK_H 7 8 #include <linux/blktrace_api.h> 9 #include <linux/blkdev.h> 10 #include <linux/buffer_head.h> 11 #include <linux/tracepoint.h> 12 13 #define RWBS_LEN 8 14 15 DECLARE_EVENT_CLASS(block_buffer, 16 17 TP_PROTO(struct buffer_head *bh), 18 19 TP_ARGS(bh), 20 21 TP_STRUCT__entry ( 22 __field( dev_t, dev ) 23 __field( sector_t, sector ) 24 __field( size_t, size ) 25 ), 26 27 TP_fast_assign( 28 __entry->dev = bh->b_bdev->bd_dev; 29 __entry->sector = bh->b_blocknr; 30 __entry->size = bh->b_size; 31 ), 32 33 TP_printk("%d,%d sector=%llu size=%zu", 34 MAJOR(__entry->dev), MINOR(__entry->dev), 35 (unsigned long long)__entry->sector, __entry->size 36 ) 37 ); 38 39 /** 40 * block_touch_buffer - mark a buffer accessed 41 * @bh: buffer_head being touched 42 * 43 * Called from touch_buffer(). 44 */ 45 DEFINE_EVENT(block_buffer, block_touch_buffer, 46 47 TP_PROTO(struct buffer_head *bh), 48 49 TP_ARGS(bh) 50 ); 51 52 /** 53 * block_dirty_buffer - mark a buffer dirty 54 * @bh: buffer_head being dirtied 55 * 56 * Called from mark_buffer_dirty(). 57 */ 58 DEFINE_EVENT(block_buffer, block_dirty_buffer, 59 60 TP_PROTO(struct buffer_head *bh), 61 62 TP_ARGS(bh) 63 ); 64 65 /** 66 * block_rq_requeue - place block IO request back on a queue 67 * @q: queue holding operation 68 * @rq: block IO operation request 69 * 70 * The block operation request @rq is being placed back into queue 71 * @q. For some reason the request was not completed and needs to be 72 * put back in the queue. 73 */ 74 TRACE_EVENT(block_rq_requeue, 75 76 TP_PROTO(struct request_queue *q, struct request *rq), 77 78 TP_ARGS(q, rq), 79 80 TP_STRUCT__entry( 81 __field( dev_t, dev ) 82 __field( sector_t, sector ) 83 __field( unsigned int, nr_sector ) 84 __array( char, rwbs, RWBS_LEN ) 85 __dynamic_array( char, cmd, 1 ) 86 ), 87 88 TP_fast_assign( 89 __entry->dev = rq->rq_disk ? disk_devt(rq->rq_disk) : 0; 90 __entry->sector = blk_rq_trace_sector(rq); 91 __entry->nr_sector = blk_rq_trace_nr_sectors(rq); 92 93 blk_fill_rwbs(__entry->rwbs, rq->cmd_flags, blk_rq_bytes(rq)); 94 __get_str(cmd)[0] = '\0'; 95 ), 96 97 TP_printk("%d,%d %s (%s) %llu + %u [%d]", 98 MAJOR(__entry->dev), MINOR(__entry->dev), 99 __entry->rwbs, __get_str(cmd), 100 (unsigned long long)__entry->sector, 101 __entry->nr_sector, 0) 102 ); 103 104 /** 105 * block_rq_complete - block IO operation completed by device driver 106 * @rq: block operations request 107 * @error: status code 108 * @nr_bytes: number of completed bytes 109 * 110 * The block_rq_complete tracepoint event indicates that some portion 111 * of operation request has been completed by the device driver. If 112 * the @rq->bio is %NULL, then there is absolutely no additional work to 113 * do for the request. If @rq->bio is non-NULL then there is 114 * additional work required to complete the request. 115 */ 116 TRACE_EVENT(block_rq_complete, 117 118 TP_PROTO(struct request *rq, int error, unsigned int nr_bytes), 119 120 TP_ARGS(rq, error, nr_bytes), 121 122 TP_STRUCT__entry( 123 __field( dev_t, dev ) 124 __field( sector_t, sector ) 125 __field( unsigned int, nr_sector ) 126 __field( int, error ) 127 __array( char, rwbs, RWBS_LEN ) 128 __dynamic_array( char, cmd, 1 ) 129 ), 130 131 TP_fast_assign( 132 __entry->dev = rq->rq_disk ? disk_devt(rq->rq_disk) : 0; 133 __entry->sector = blk_rq_pos(rq); 134 __entry->nr_sector = nr_bytes >> 9; 135 __entry->error = error; 136 137 blk_fill_rwbs(__entry->rwbs, rq->cmd_flags, nr_bytes); 138 __get_str(cmd)[0] = '\0'; 139 ), 140 141 TP_printk("%d,%d %s (%s) %llu + %u [%d]", 142 MAJOR(__entry->dev), MINOR(__entry->dev), 143 __entry->rwbs, __get_str(cmd), 144 (unsigned long long)__entry->sector, 145 __entry->nr_sector, __entry->error) 146 ); 147 148 DECLARE_EVENT_CLASS(block_rq, 149 150 TP_PROTO(struct request_queue *q, struct request *rq), 151 152 TP_ARGS(q, rq), 153 154 TP_STRUCT__entry( 155 __field( dev_t, dev ) 156 __field( sector_t, sector ) 157 __field( unsigned int, nr_sector ) 158 __field( unsigned int, bytes ) 159 __array( char, rwbs, RWBS_LEN ) 160 __array( char, comm, TASK_COMM_LEN ) 161 __dynamic_array( char, cmd, 1 ) 162 ), 163 164 TP_fast_assign( 165 __entry->dev = rq->rq_disk ? disk_devt(rq->rq_disk) : 0; 166 __entry->sector = blk_rq_trace_sector(rq); 167 __entry->nr_sector = blk_rq_trace_nr_sectors(rq); 168 __entry->bytes = blk_rq_bytes(rq); 169 170 blk_fill_rwbs(__entry->rwbs, rq->cmd_flags, blk_rq_bytes(rq)); 171 __get_str(cmd)[0] = '\0'; 172 memcpy(__entry->comm, current->comm, TASK_COMM_LEN); 173 ), 174 175 TP_printk("%d,%d %s %u (%s) %llu + %u [%s]", 176 MAJOR(__entry->dev), MINOR(__entry->dev), 177 __entry->rwbs, __entry->bytes, __get_str(cmd), 178 (unsigned long long)__entry->sector, 179 __entry->nr_sector, __entry->comm) 180 ); 181 182 /** 183 * block_rq_insert - insert block operation request into queue 184 * @q: target queue 185 * @rq: block IO operation request 186 * 187 * Called immediately before block operation request @rq is inserted 188 * into queue @q. The fields in the operation request @rq struct can 189 * be examined to determine which device and sectors the pending 190 * operation would access. 191 */ 192 DEFINE_EVENT(block_rq, block_rq_insert, 193 194 TP_PROTO(struct request_queue *q, struct request *rq), 195 196 TP_ARGS(q, rq) 197 ); 198 199 /** 200 * block_rq_issue - issue pending block IO request operation to device driver 201 * @q: queue holding operation 202 * @rq: block IO operation operation request 203 * 204 * Called when block operation request @rq from queue @q is sent to a 205 * device driver for processing. 206 */ 207 DEFINE_EVENT(block_rq, block_rq_issue, 208 209 TP_PROTO(struct request_queue *q, struct request *rq), 210 211 TP_ARGS(q, rq) 212 ); 213 214 /** 215 * block_bio_bounce - used bounce buffer when processing block operation 216 * @q: queue holding the block operation 217 * @bio: block operation 218 * 219 * A bounce buffer was used to handle the block operation @bio in @q. 220 * This occurs when hardware limitations prevent a direct transfer of 221 * data between the @bio data memory area and the IO device. Use of a 222 * bounce buffer requires extra copying of data and decreases 223 * performance. 224 */ 225 TRACE_EVENT(block_bio_bounce, 226 227 TP_PROTO(struct request_queue *q, struct bio *bio), 228 229 TP_ARGS(q, bio), 230 231 TP_STRUCT__entry( 232 __field( dev_t, dev ) 233 __field( sector_t, sector ) 234 __field( unsigned int, nr_sector ) 235 __array( char, rwbs, RWBS_LEN ) 236 __array( char, comm, TASK_COMM_LEN ) 237 ), 238 239 TP_fast_assign( 240 __entry->dev = bio_dev(bio); 241 __entry->sector = bio->bi_iter.bi_sector; 242 __entry->nr_sector = bio_sectors(bio); 243 blk_fill_rwbs(__entry->rwbs, bio->bi_opf, bio->bi_iter.bi_size); 244 memcpy(__entry->comm, current->comm, TASK_COMM_LEN); 245 ), 246 247 TP_printk("%d,%d %s %llu + %u [%s]", 248 MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs, 249 (unsigned long long)__entry->sector, 250 __entry->nr_sector, __entry->comm) 251 ); 252 253 /** 254 * block_bio_complete - completed all work on the block operation 255 * @q: queue holding the block operation 256 * @bio: block operation completed 257 * @error: io error value 258 * 259 * This tracepoint indicates there is no further work to do on this 260 * block IO operation @bio. 261 */ 262 TRACE_EVENT(block_bio_complete, 263 264 TP_PROTO(struct request_queue *q, struct bio *bio, int error), 265 266 TP_ARGS(q, bio, error), 267 268 TP_STRUCT__entry( 269 __field( dev_t, dev ) 270 __field( sector_t, sector ) 271 __field( unsigned, nr_sector ) 272 __field( int, error ) 273 __array( char, rwbs, RWBS_LEN) 274 ), 275 276 TP_fast_assign( 277 __entry->dev = bio_dev(bio); 278 __entry->sector = bio->bi_iter.bi_sector; 279 __entry->nr_sector = bio_sectors(bio); 280 __entry->error = error; 281 blk_fill_rwbs(__entry->rwbs, bio->bi_opf, bio->bi_iter.bi_size); 282 ), 283 284 TP_printk("%d,%d %s %llu + %u [%d]", 285 MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs, 286 (unsigned long long)__entry->sector, 287 __entry->nr_sector, __entry->error) 288 ); 289 290 DECLARE_EVENT_CLASS(block_bio_merge, 291 292 TP_PROTO(struct request_queue *q, struct request *rq, struct bio *bio), 293 294 TP_ARGS(q, rq, bio), 295 296 TP_STRUCT__entry( 297 __field( dev_t, dev ) 298 __field( sector_t, sector ) 299 __field( unsigned int, nr_sector ) 300 __array( char, rwbs, RWBS_LEN ) 301 __array( char, comm, TASK_COMM_LEN ) 302 ), 303 304 TP_fast_assign( 305 __entry->dev = bio_dev(bio); 306 __entry->sector = bio->bi_iter.bi_sector; 307 __entry->nr_sector = bio_sectors(bio); 308 blk_fill_rwbs(__entry->rwbs, bio->bi_opf, bio->bi_iter.bi_size); 309 memcpy(__entry->comm, current->comm, TASK_COMM_LEN); 310 ), 311 312 TP_printk("%d,%d %s %llu + %u [%s]", 313 MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs, 314 (unsigned long long)__entry->sector, 315 __entry->nr_sector, __entry->comm) 316 ); 317 318 /** 319 * block_bio_backmerge - merging block operation to the end of an existing operation 320 * @q: queue holding operation 321 * @rq: request bio is being merged into 322 * @bio: new block operation to merge 323 * 324 * Merging block request @bio to the end of an existing block request 325 * in queue @q. 326 */ 327 DEFINE_EVENT(block_bio_merge, block_bio_backmerge, 328 329 TP_PROTO(struct request_queue *q, struct request *rq, struct bio *bio), 330 331 TP_ARGS(q, rq, bio) 332 ); 333 334 /** 335 * block_bio_frontmerge - merging block operation to the beginning of an existing operation 336 * @q: queue holding operation 337 * @rq: request bio is being merged into 338 * @bio: new block operation to merge 339 * 340 * Merging block IO operation @bio to the beginning of an existing block 341 * operation in queue @q. 342 */ 343 DEFINE_EVENT(block_bio_merge, block_bio_frontmerge, 344 345 TP_PROTO(struct request_queue *q, struct request *rq, struct bio *bio), 346 347 TP_ARGS(q, rq, bio) 348 ); 349 350 /** 351 * block_bio_queue - putting new block IO operation in queue 352 * @q: queue holding operation 353 * @bio: new block operation 354 * 355 * About to place the block IO operation @bio into queue @q. 356 */ 357 TRACE_EVENT(block_bio_queue, 358 359 TP_PROTO(struct request_queue *q, struct bio *bio), 360 361 TP_ARGS(q, bio), 362 363 TP_STRUCT__entry( 364 __field( dev_t, dev ) 365 __field( sector_t, sector ) 366 __field( unsigned int, nr_sector ) 367 __array( char, rwbs, RWBS_LEN ) 368 __array( char, comm, TASK_COMM_LEN ) 369 ), 370 371 TP_fast_assign( 372 __entry->dev = bio_dev(bio); 373 __entry->sector = bio->bi_iter.bi_sector; 374 __entry->nr_sector = bio_sectors(bio); 375 blk_fill_rwbs(__entry->rwbs, bio->bi_opf, bio->bi_iter.bi_size); 376 memcpy(__entry->comm, current->comm, TASK_COMM_LEN); 377 ), 378 379 TP_printk("%d,%d %s %llu + %u [%s]", 380 MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs, 381 (unsigned long long)__entry->sector, 382 __entry->nr_sector, __entry->comm) 383 ); 384 385 DECLARE_EVENT_CLASS(block_get_rq, 386 387 TP_PROTO(struct request_queue *q, struct bio *bio, int rw), 388 389 TP_ARGS(q, bio, rw), 390 391 TP_STRUCT__entry( 392 __field( dev_t, dev ) 393 __field( sector_t, sector ) 394 __field( unsigned int, nr_sector ) 395 __array( char, rwbs, RWBS_LEN ) 396 __array( char, comm, TASK_COMM_LEN ) 397 ), 398 399 TP_fast_assign( 400 __entry->dev = bio ? bio_dev(bio) : 0; 401 __entry->sector = bio ? bio->bi_iter.bi_sector : 0; 402 __entry->nr_sector = bio ? bio_sectors(bio) : 0; 403 blk_fill_rwbs(__entry->rwbs, 404 bio ? bio->bi_opf : 0, __entry->nr_sector); 405 memcpy(__entry->comm, current->comm, TASK_COMM_LEN); 406 ), 407 408 TP_printk("%d,%d %s %llu + %u [%s]", 409 MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs, 410 (unsigned long long)__entry->sector, 411 __entry->nr_sector, __entry->comm) 412 ); 413 414 /** 415 * block_getrq - get a free request entry in queue for block IO operations 416 * @q: queue for operations 417 * @bio: pending block IO operation (can be %NULL) 418 * @rw: low bit indicates a read (%0) or a write (%1) 419 * 420 * A request struct for queue @q has been allocated to handle the 421 * block IO operation @bio. 422 */ 423 DEFINE_EVENT(block_get_rq, block_getrq, 424 425 TP_PROTO(struct request_queue *q, struct bio *bio, int rw), 426 427 TP_ARGS(q, bio, rw) 428 ); 429 430 /** 431 * block_sleeprq - waiting to get a free request entry in queue for block IO operation 432 * @q: queue for operation 433 * @bio: pending block IO operation (can be %NULL) 434 * @rw: low bit indicates a read (%0) or a write (%1) 435 * 436 * In the case where a request struct cannot be provided for queue @q 437 * the process needs to wait for an request struct to become 438 * available. This tracepoint event is generated each time the 439 * process goes to sleep waiting for request struct become available. 440 */ 441 DEFINE_EVENT(block_get_rq, block_sleeprq, 442 443 TP_PROTO(struct request_queue *q, struct bio *bio, int rw), 444 445 TP_ARGS(q, bio, rw) 446 ); 447 448 /** 449 * block_plug - keep operations requests in request queue 450 * @q: request queue to plug 451 * 452 * Plug the request queue @q. Do not allow block operation requests 453 * to be sent to the device driver. Instead, accumulate requests in 454 * the queue to improve throughput performance of the block device. 455 */ 456 TRACE_EVENT(block_plug, 457 458 TP_PROTO(struct request_queue *q), 459 460 TP_ARGS(q), 461 462 TP_STRUCT__entry( 463 __array( char, comm, TASK_COMM_LEN ) 464 ), 465 466 TP_fast_assign( 467 memcpy(__entry->comm, current->comm, TASK_COMM_LEN); 468 ), 469 470 TP_printk("[%s]", __entry->comm) 471 ); 472 473 DECLARE_EVENT_CLASS(block_unplug, 474 475 TP_PROTO(struct request_queue *q, unsigned int depth, bool explicit), 476 477 TP_ARGS(q, depth, explicit), 478 479 TP_STRUCT__entry( 480 __field( int, nr_rq ) 481 __array( char, comm, TASK_COMM_LEN ) 482 ), 483 484 TP_fast_assign( 485 __entry->nr_rq = depth; 486 memcpy(__entry->comm, current->comm, TASK_COMM_LEN); 487 ), 488 489 TP_printk("[%s] %d", __entry->comm, __entry->nr_rq) 490 ); 491 492 /** 493 * block_unplug - release of operations requests in request queue 494 * @q: request queue to unplug 495 * @depth: number of requests just added to the queue 496 * @explicit: whether this was an explicit unplug, or one from schedule() 497 * 498 * Unplug request queue @q because device driver is scheduled to work 499 * on elements in the request queue. 500 */ 501 DEFINE_EVENT(block_unplug, block_unplug, 502 503 TP_PROTO(struct request_queue *q, unsigned int depth, bool explicit), 504 505 TP_ARGS(q, depth, explicit) 506 ); 507 508 /** 509 * block_split - split a single bio struct into two bio structs 510 * @q: queue containing the bio 511 * @bio: block operation being split 512 * @new_sector: The starting sector for the new bio 513 * 514 * The bio request @bio in request queue @q needs to be split into two 515 * bio requests. The newly created @bio request starts at 516 * @new_sector. This split may be required due to hardware limitation 517 * such as operation crossing device boundaries in a RAID system. 518 */ 519 TRACE_EVENT(block_split, 520 521 TP_PROTO(struct request_queue *q, struct bio *bio, 522 unsigned int new_sector), 523 524 TP_ARGS(q, bio, new_sector), 525 526 TP_STRUCT__entry( 527 __field( dev_t, dev ) 528 __field( sector_t, sector ) 529 __field( sector_t, new_sector ) 530 __array( char, rwbs, RWBS_LEN ) 531 __array( char, comm, TASK_COMM_LEN ) 532 ), 533 534 TP_fast_assign( 535 __entry->dev = bio_dev(bio); 536 __entry->sector = bio->bi_iter.bi_sector; 537 __entry->new_sector = new_sector; 538 blk_fill_rwbs(__entry->rwbs, bio->bi_opf, bio->bi_iter.bi_size); 539 memcpy(__entry->comm, current->comm, TASK_COMM_LEN); 540 ), 541 542 TP_printk("%d,%d %s %llu / %llu [%s]", 543 MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs, 544 (unsigned long long)__entry->sector, 545 (unsigned long long)__entry->new_sector, 546 __entry->comm) 547 ); 548 549 /** 550 * block_bio_remap - map request for a logical device to the raw device 551 * @q: queue holding the operation 552 * @bio: revised operation 553 * @dev: device for the operation 554 * @from: original sector for the operation 555 * 556 * An operation for a logical device has been mapped to the 557 * raw block device. 558 */ 559 TRACE_EVENT(block_bio_remap, 560 561 TP_PROTO(struct request_queue *q, struct bio *bio, dev_t dev, 562 sector_t from), 563 564 TP_ARGS(q, bio, dev, from), 565 566 TP_STRUCT__entry( 567 __field( dev_t, dev ) 568 __field( sector_t, sector ) 569 __field( unsigned int, nr_sector ) 570 __field( dev_t, old_dev ) 571 __field( sector_t, old_sector ) 572 __array( char, rwbs, RWBS_LEN) 573 ), 574 575 TP_fast_assign( 576 __entry->dev = bio_dev(bio); 577 __entry->sector = bio->bi_iter.bi_sector; 578 __entry->nr_sector = bio_sectors(bio); 579 __entry->old_dev = dev; 580 __entry->old_sector = from; 581 blk_fill_rwbs(__entry->rwbs, bio->bi_opf, bio->bi_iter.bi_size); 582 ), 583 584 TP_printk("%d,%d %s %llu + %u <- (%d,%d) %llu", 585 MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs, 586 (unsigned long long)__entry->sector, 587 __entry->nr_sector, 588 MAJOR(__entry->old_dev), MINOR(__entry->old_dev), 589 (unsigned long long)__entry->old_sector) 590 ); 591 592 /** 593 * block_rq_remap - map request for a block operation request 594 * @q: queue holding the operation 595 * @rq: block IO operation request 596 * @dev: device for the operation 597 * @from: original sector for the operation 598 * 599 * The block operation request @rq in @q has been remapped. The block 600 * operation request @rq holds the current information and @from hold 601 * the original sector. 602 */ 603 TRACE_EVENT(block_rq_remap, 604 605 TP_PROTO(struct request_queue *q, struct request *rq, dev_t dev, 606 sector_t from), 607 608 TP_ARGS(q, rq, dev, from), 609 610 TP_STRUCT__entry( 611 __field( dev_t, dev ) 612 __field( sector_t, sector ) 613 __field( unsigned int, nr_sector ) 614 __field( dev_t, old_dev ) 615 __field( sector_t, old_sector ) 616 __field( unsigned int, nr_bios ) 617 __array( char, rwbs, RWBS_LEN) 618 ), 619 620 TP_fast_assign( 621 __entry->dev = disk_devt(rq->rq_disk); 622 __entry->sector = blk_rq_pos(rq); 623 __entry->nr_sector = blk_rq_sectors(rq); 624 __entry->old_dev = dev; 625 __entry->old_sector = from; 626 __entry->nr_bios = blk_rq_count_bios(rq); 627 blk_fill_rwbs(__entry->rwbs, rq->cmd_flags, blk_rq_bytes(rq)); 628 ), 629 630 TP_printk("%d,%d %s %llu + %u <- (%d,%d) %llu %u", 631 MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs, 632 (unsigned long long)__entry->sector, 633 __entry->nr_sector, 634 MAJOR(__entry->old_dev), MINOR(__entry->old_dev), 635 (unsigned long long)__entry->old_sector, __entry->nr_bios) 636 ); 637 638 #endif /* _TRACE_BLOCK_H */ 639 640 /* This part must be outside protection */ 641 #include <trace/define_trace.h> 642 643