include/trace/events/block.h

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