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