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->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); 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); 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 *rq), 150 151 TP_ARGS(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); 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 * @rq: block IO operation request 184 * 185 * Called immediately before block operation request @rq is inserted 186 * into queue @q. The fields in the operation request @rq struct can 187 * be examined to determine which device and sectors the pending 188 * operation would access. 189 */ 190 DEFINE_EVENT(block_rq, block_rq_insert, 191 192 TP_PROTO(struct request *rq), 193 194 TP_ARGS(rq) 195 ); 196 197 /** 198 * block_rq_issue - issue pending block IO request operation to device driver 199 * @rq: block IO operation request 200 * 201 * Called when block operation request @rq from queue @q is sent to a 202 * device driver for processing. 203 */ 204 DEFINE_EVENT(block_rq, block_rq_issue, 205 206 TP_PROTO(struct request *rq), 207 208 TP_ARGS(rq) 209 ); 210 211 /** 212 * block_rq_merge - merge request with another one in the elevator 213 * @rq: block IO operation request 214 * 215 * Called when block operation request @rq from queue @q is merged to another 216 * request queued in the elevator. 217 */ 218 DEFINE_EVENT(block_rq, block_rq_merge, 219 220 TP_PROTO(struct request *rq), 221 222 TP_ARGS(rq) 223 ); 224 225 /** 226 * block_bio_complete - completed all work on the block operation 227 * @q: queue holding the block operation 228 * @bio: block operation completed 229 * 230 * This tracepoint indicates there is no further work to do on this 231 * block IO operation @bio. 232 */ 233 TRACE_EVENT(block_bio_complete, 234 235 TP_PROTO(struct request_queue *q, struct bio *bio), 236 237 TP_ARGS(q, bio), 238 239 TP_STRUCT__entry( 240 __field( dev_t, dev ) 241 __field( sector_t, sector ) 242 __field( unsigned, nr_sector ) 243 __field( int, error ) 244 __array( char, rwbs, RWBS_LEN) 245 ), 246 247 TP_fast_assign( 248 __entry->dev = bio_dev(bio); 249 __entry->sector = bio->bi_iter.bi_sector; 250 __entry->nr_sector = bio_sectors(bio); 251 __entry->error = blk_status_to_errno(bio->bi_status); 252 blk_fill_rwbs(__entry->rwbs, bio->bi_opf); 253 ), 254 255 TP_printk("%d,%d %s %llu + %u [%d]", 256 MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs, 257 (unsigned long long)__entry->sector, 258 __entry->nr_sector, __entry->error) 259 ); 260 261 DECLARE_EVENT_CLASS(block_bio, 262 263 TP_PROTO(struct bio *bio), 264 265 TP_ARGS(bio), 266 267 TP_STRUCT__entry( 268 __field( dev_t, dev ) 269 __field( sector_t, sector ) 270 __field( unsigned int, nr_sector ) 271 __array( char, rwbs, RWBS_LEN ) 272 __array( char, comm, TASK_COMM_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 blk_fill_rwbs(__entry->rwbs, bio->bi_opf); 280 memcpy(__entry->comm, current->comm, TASK_COMM_LEN); 281 ), 282 283 TP_printk("%d,%d %s %llu + %u [%s]", 284 MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs, 285 (unsigned long long)__entry->sector, 286 __entry->nr_sector, __entry->comm) 287 ); 288 289 /** 290 * block_bio_bounce - used bounce buffer when processing block operation 291 * @bio: block operation 292 * 293 * A bounce buffer was used to handle the block operation @bio in @q. 294 * This occurs when hardware limitations prevent a direct transfer of 295 * data between the @bio data memory area and the IO device. Use of a 296 * bounce buffer requires extra copying of data and decreases 297 * performance. 298 */ 299 DEFINE_EVENT(block_bio, block_bio_bounce, 300 TP_PROTO(struct bio *bio), 301 TP_ARGS(bio) 302 ); 303 304 /** 305 * block_bio_backmerge - merging block operation to the end of an existing operation 306 * @bio: new block operation to merge 307 * 308 * Merging block request @bio to the end of an existing block request. 309 */ 310 DEFINE_EVENT(block_bio, block_bio_backmerge, 311 TP_PROTO(struct bio *bio), 312 TP_ARGS(bio) 313 ); 314 315 /** 316 * block_bio_frontmerge - merging block operation to the beginning of an existing operation 317 * @bio: new block operation to merge 318 * 319 * Merging block IO operation @bio to the beginning of an existing block request. 320 */ 321 DEFINE_EVENT(block_bio, block_bio_frontmerge, 322 TP_PROTO(struct bio *bio), 323 TP_ARGS(bio) 324 ); 325 326 /** 327 * block_bio_queue - putting new block IO operation in queue 328 * @bio: new block operation 329 * 330 * About to place the block IO operation @bio into queue @q. 331 */ 332 DEFINE_EVENT(block_bio, block_bio_queue, 333 TP_PROTO(struct bio *bio), 334 TP_ARGS(bio) 335 ); 336 337 /** 338 * block_getrq - get a free request entry in queue for block IO operations 339 * @bio: pending block IO operation (can be %NULL) 340 * 341 * A request struct has been allocated to handle the block IO operation @bio. 342 */ 343 DEFINE_EVENT(block_bio, block_getrq, 344 TP_PROTO(struct bio *bio), 345 TP_ARGS(bio) 346 ); 347 348 /** 349 * block_plug - keep operations requests in request queue 350 * @q: request queue to plug 351 * 352 * Plug the request queue @q. Do not allow block operation requests 353 * to be sent to the device driver. Instead, accumulate requests in 354 * the queue to improve throughput performance of the block device. 355 */ 356 TRACE_EVENT(block_plug, 357 358 TP_PROTO(struct request_queue *q), 359 360 TP_ARGS(q), 361 362 TP_STRUCT__entry( 363 __array( char, comm, TASK_COMM_LEN ) 364 ), 365 366 TP_fast_assign( 367 memcpy(__entry->comm, current->comm, TASK_COMM_LEN); 368 ), 369 370 TP_printk("[%s]", __entry->comm) 371 ); 372 373 DECLARE_EVENT_CLASS(block_unplug, 374 375 TP_PROTO(struct request_queue *q, unsigned int depth, bool explicit), 376 377 TP_ARGS(q, depth, explicit), 378 379 TP_STRUCT__entry( 380 __field( int, nr_rq ) 381 __array( char, comm, TASK_COMM_LEN ) 382 ), 383 384 TP_fast_assign( 385 __entry->nr_rq = depth; 386 memcpy(__entry->comm, current->comm, TASK_COMM_LEN); 387 ), 388 389 TP_printk("[%s] %d", __entry->comm, __entry->nr_rq) 390 ); 391 392 /** 393 * block_unplug - release of operations requests in request queue 394 * @q: request queue to unplug 395 * @depth: number of requests just added to the queue 396 * @explicit: whether this was an explicit unplug, or one from schedule() 397 * 398 * Unplug request queue @q because device driver is scheduled to work 399 * on elements in the request queue. 400 */ 401 DEFINE_EVENT(block_unplug, block_unplug, 402 403 TP_PROTO(struct request_queue *q, unsigned int depth, bool explicit), 404 405 TP_ARGS(q, depth, explicit) 406 ); 407 408 /** 409 * block_split - split a single bio struct into two bio structs 410 * @bio: block operation being split 411 * @new_sector: The starting sector for the new bio 412 * 413 * The bio request @bio needs to be split into two bio requests. The newly 414 * created @bio request starts at @new_sector. This split may be required due to 415 * hardware limitations such as operation crossing device boundaries in a RAID 416 * system. 417 */ 418 TRACE_EVENT(block_split, 419 420 TP_PROTO(struct bio *bio, unsigned int new_sector), 421 422 TP_ARGS(bio, new_sector), 423 424 TP_STRUCT__entry( 425 __field( dev_t, dev ) 426 __field( sector_t, sector ) 427 __field( sector_t, new_sector ) 428 __array( char, rwbs, RWBS_LEN ) 429 __array( char, comm, TASK_COMM_LEN ) 430 ), 431 432 TP_fast_assign( 433 __entry->dev = bio_dev(bio); 434 __entry->sector = bio->bi_iter.bi_sector; 435 __entry->new_sector = new_sector; 436 blk_fill_rwbs(__entry->rwbs, bio->bi_opf); 437 memcpy(__entry->comm, current->comm, TASK_COMM_LEN); 438 ), 439 440 TP_printk("%d,%d %s %llu / %llu [%s]", 441 MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs, 442 (unsigned long long)__entry->sector, 443 (unsigned long long)__entry->new_sector, 444 __entry->comm) 445 ); 446 447 /** 448 * block_bio_remap - map request for a logical device to the raw device 449 * @bio: revised operation 450 * @dev: original device for the operation 451 * @from: original sector for the operation 452 * 453 * An operation for a logical device has been mapped to the 454 * raw block device. 455 */ 456 TRACE_EVENT(block_bio_remap, 457 458 TP_PROTO(struct bio *bio, dev_t dev, sector_t from), 459 460 TP_ARGS(bio, dev, from), 461 462 TP_STRUCT__entry( 463 __field( dev_t, dev ) 464 __field( sector_t, sector ) 465 __field( unsigned int, nr_sector ) 466 __field( dev_t, old_dev ) 467 __field( sector_t, old_sector ) 468 __array( char, rwbs, RWBS_LEN) 469 ), 470 471 TP_fast_assign( 472 __entry->dev = bio_dev(bio); 473 __entry->sector = bio->bi_iter.bi_sector; 474 __entry->nr_sector = bio_sectors(bio); 475 __entry->old_dev = dev; 476 __entry->old_sector = from; 477 blk_fill_rwbs(__entry->rwbs, bio->bi_opf); 478 ), 479 480 TP_printk("%d,%d %s %llu + %u <- (%d,%d) %llu", 481 MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs, 482 (unsigned long long)__entry->sector, 483 __entry->nr_sector, 484 MAJOR(__entry->old_dev), MINOR(__entry->old_dev), 485 (unsigned long long)__entry->old_sector) 486 ); 487 488 /** 489 * block_rq_remap - map request for a block operation request 490 * @rq: block IO operation request 491 * @dev: device for the operation 492 * @from: original sector for the operation 493 * 494 * The block operation request @rq in @q has been remapped. The block 495 * operation request @rq holds the current information and @from hold 496 * the original sector. 497 */ 498 TRACE_EVENT(block_rq_remap, 499 500 TP_PROTO(struct request *rq, dev_t dev, sector_t from), 501 502 TP_ARGS(rq, dev, from), 503 504 TP_STRUCT__entry( 505 __field( dev_t, dev ) 506 __field( sector_t, sector ) 507 __field( unsigned int, nr_sector ) 508 __field( dev_t, old_dev ) 509 __field( sector_t, old_sector ) 510 __field( unsigned int, nr_bios ) 511 __array( char, rwbs, RWBS_LEN) 512 ), 513 514 TP_fast_assign( 515 __entry->dev = disk_devt(rq->rq_disk); 516 __entry->sector = blk_rq_pos(rq); 517 __entry->nr_sector = blk_rq_sectors(rq); 518 __entry->old_dev = dev; 519 __entry->old_sector = from; 520 __entry->nr_bios = blk_rq_count_bios(rq); 521 blk_fill_rwbs(__entry->rwbs, rq->cmd_flags); 522 ), 523 524 TP_printk("%d,%d %s %llu + %u <- (%d,%d) %llu %u", 525 MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs, 526 (unsigned long long)__entry->sector, 527 __entry->nr_sector, 528 MAJOR(__entry->old_dev), MINOR(__entry->old_dev), 529 (unsigned long long)__entry->old_sector, __entry->nr_bios) 530 ); 531 532 #endif /* _TRACE_BLOCK_H */ 533 534 /* This part must be outside protection */ 535 #include <trace/define_trace.h> 536 537