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