include/trace/events/block.h

   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