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_rq(__entry->rwbs, 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_rq(__entry->rwbs, 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  *
 210  * This tracepoint indicates there is no further work to do on this
 211  * block IO operation @bio.
 212  */
 213 TRACE_EVENT(block_bio_complete,
 214
 215         TP_PROTO(struct request_queue *q, struct bio *bio),
 216
 217         TP_ARGS(q, bio),
 218
 219         TP_STRUCT__entry(
 220                 __field( dev_t,         dev             )
 221                 __field( sector_t,      sector          )
 222                 __field( unsigned,      nr_sector       )
 223                 __field( int,           error           )
 224                 __array( char,          rwbs,   6       )
 225         ),
 226
 227         TP_fast_assign(
 228                 __entry->dev            = bio->bi_bdev->bd_dev;
 229                 __entry->sector         = bio->bi_sector;
 230                 __entry->nr_sector      = bio->bi_size >> 9;
 231                 blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_size);
 232         ),
 233
 234         TP_printk("%d,%d %s %llu + %u [%d]",
 235                   MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
 236                   (unsigned long long)__entry->sector,
 237                   __entry->nr_sector, __entry->error)
 238 );
 239
 240 DECLARE_EVENT_CLASS(block_bio,
 241
 242         TP_PROTO(struct request_queue *q, struct bio *bio),
 243
 244         TP_ARGS(q, bio),
 245
 246         TP_STRUCT__entry(
 247                 __field( dev_t,         dev                     )
 248                 __field( sector_t,      sector                  )
 249                 __field( unsigned int,  nr_sector               )
 250                 __array( char,          rwbs,   6               )
 251                 __array( char,          comm,   TASK_COMM_LEN   )
 252         ),
 253
 254         TP_fast_assign(
 255                 __entry->dev            = bio->bi_bdev->bd_dev;
 256                 __entry->sector         = bio->bi_sector;
 257                 __entry->nr_sector      = bio->bi_size >> 9;
 258                 blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_size);
 259                 memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
 260         ),
 261
 262         TP_printk("%d,%d %s %llu + %u [%s]",
 263                   MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
 264                   (unsigned long long)__entry->sector,
 265                   __entry->nr_sector, __entry->comm)
 266 );
 267
 268 /**
 269  * block_bio_backmerge - merging block operation to the end of an existing operation
 270  * @q: queue holding operation
 271  * @bio: new block operation to merge
 272  *
 273  * Merging block request @bio to the end of an existing block request
 274  * in queue @q.
 275  */
 276 DEFINE_EVENT(block_bio, block_bio_backmerge,
 277
 278         TP_PROTO(struct request_queue *q, struct bio *bio),
 279
 280         TP_ARGS(q, bio)
 281 );
 282
 283 /**
 284  * block_bio_frontmerge - merging block operation to the beginning of an existing operation
 285  * @q: queue holding operation
 286  * @bio: new block operation to merge
 287  *
 288  * Merging block IO operation @bio to the beginning of an existing block
 289  * operation in queue @q.
 290  */
 291 DEFINE_EVENT(block_bio, block_bio_frontmerge,
 292
 293         TP_PROTO(struct request_queue *q, struct bio *bio),
 294
 295         TP_ARGS(q, bio)
 296 );
 297
 298 /**
 299  * block_bio_queue - putting new block IO operation in queue
 300  * @q: queue holding operation
 301  * @bio: new block operation
 302  *
 303  * About to place the block IO operation @bio into queue @q.
 304  */
 305 DEFINE_EVENT(block_bio, block_bio_queue,
 306
 307         TP_PROTO(struct request_queue *q, struct bio *bio),
 308
 309         TP_ARGS(q, bio)
 310 );
 311
 312 DECLARE_EVENT_CLASS(block_get_rq,
 313
 314         TP_PROTO(struct request_queue *q, struct bio *bio, int rw),
 315
 316         TP_ARGS(q, bio, rw),
 317
 318         TP_STRUCT__entry(
 319                 __field( dev_t,         dev                     )
 320                 __field( sector_t,      sector                  )
 321                 __field( unsigned int,  nr_sector               )
 322                 __array( char,          rwbs,   6               )
 323                 __array( char,          comm,   TASK_COMM_LEN   )
 324         ),
 325
 326         TP_fast_assign(
 327                 __entry->dev            = bio ? bio->bi_bdev->bd_dev : 0;
 328                 __entry->sector         = bio ? bio->bi_sector : 0;
 329                 __entry->nr_sector      = bio ? bio->bi_size >> 9 : 0;
 330                 blk_fill_rwbs(__entry->rwbs,
 331                               bio ? bio->bi_rw : 0, __entry->nr_sector);
 332                 memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
 333         ),
 334
 335         TP_printk("%d,%d %s %llu + %u [%s]",
 336                   MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
 337                   (unsigned long long)__entry->sector,
 338                   __entry->nr_sector, __entry->comm)
 339 );
 340
 341 /**
 342  * block_getrq - get a free request entry in queue for block IO operations
 343  * @q: queue for operations
 344  * @bio: pending block IO operation
 345  * @rw: low bit indicates a read (%0) or a write (%1)
 346  *
 347  * A request struct for queue @q has been allocated to handle the
 348  * block IO operation @bio.
 349  */
 350 DEFINE_EVENT(block_get_rq, block_getrq,
 351
 352         TP_PROTO(struct request_queue *q, struct bio *bio, int rw),
 353
 354         TP_ARGS(q, bio, rw)
 355 );
 356
 357 /**
 358  * block_sleeprq - waiting to get a free request entry in queue for block IO operation
 359  * @q: queue for operation
 360  * @bio: pending block IO operation
 361  * @rw: low bit indicates a read (%0) or a write (%1)
 362  *
 363  * In the case where a request struct cannot be provided for queue @q
 364  * the process needs to wait for an request struct to become
 365  * available.  This tracepoint event is generated each time the
 366  * process goes to sleep waiting for request struct become available.
 367  */
 368 DEFINE_EVENT(block_get_rq, block_sleeprq,
 369
 370         TP_PROTO(struct request_queue *q, struct bio *bio, int rw),
 371
 372         TP_ARGS(q, bio, rw)
 373 );
 374
 375 /**
 376  * block_plug - keep operations requests in request queue
 377  * @q: request queue to plug
 378  *
 379  * Plug the request queue @q.  Do not allow block operation requests
 380  * to be sent to the device driver. Instead, accumulate requests in
 381  * the queue to improve throughput performance of the block device.
 382  */
 383 TRACE_EVENT(block_plug,
 384
 385         TP_PROTO(struct request_queue *q),
 386
 387         TP_ARGS(q),
 388
 389         TP_STRUCT__entry(
 390                 __array( char,          comm,   TASK_COMM_LEN   )
 391         ),
 392
 393         TP_fast_assign(
 394                 memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
 395         ),
 396
 397         TP_printk("[%s]", __entry->comm)
 398 );
 399
 400 DECLARE_EVENT_CLASS(block_unplug,
 401
 402         TP_PROTO(struct request_queue *q),
 403
 404         TP_ARGS(q),
 405
 406         TP_STRUCT__entry(
 407                 __field( int,           nr_rq                   )
 408                 __array( char,          comm,   TASK_COMM_LEN   )
 409         ),
 410
 411         TP_fast_assign(
 412                 __entry->nr_rq  = q->rq.count[READ] + q->rq.count[WRITE];
 413                 memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
 414         ),
 415
 416         TP_printk("[%s] %d", __entry->comm, __entry->nr_rq)
 417 );
 418
 419 /**
 420  * block_unplug_timer - timed release of operations requests in queue to device driver
 421  * @q: request queue to unplug
 422  *
 423  * Unplug the request queue @q because a timer expired and allow block
 424  * operation requests to be sent to the device driver.
 425  */
 426 DEFINE_EVENT(block_unplug, block_unplug_timer,
 427
 428         TP_PROTO(struct request_queue *q),
 429
 430         TP_ARGS(q)
 431 );
 432
 433 /**
 434  * block_unplug_io - release of operations requests in request queue
 435  * @q: request queue to unplug
 436  *
 437  * Unplug request queue @q because device driver is scheduled to work
 438  * on elements in the request queue.
 439  */
 440 DEFINE_EVENT(block_unplug, block_unplug_io,
 441
 442         TP_PROTO(struct request_queue *q),
 443
 444         TP_ARGS(q)
 445 );
 446
 447 /**
 448  * block_split - split a single bio struct into two bio structs
 449  * @q: queue containing the bio
 450  * @bio: block operation being split
 451  * @new_sector: The starting sector for the new bio
 452  *
 453  * The bio request @bio in request queue @q needs to be split into two
 454  * bio requests. The newly created @bio request starts at
 455  * @new_sector. This split may be required due to hardware limitation
 456  * such as operation crossing device boundaries in a RAID system.
 457  */
 458 TRACE_EVENT(block_split,
 459
 460         TP_PROTO(struct request_queue *q, struct bio *bio,
 461                  unsigned int new_sector),
 462
 463         TP_ARGS(q, bio, new_sector),
 464
 465         TP_STRUCT__entry(
 466                 __field( dev_t,         dev                             )
 467                 __field( sector_t,      sector                          )
 468                 __field( sector_t,      new_sector                      )
 469                 __array( char,          rwbs,           6               )
 470                 __array( char,          comm,           TASK_COMM_LEN   )
 471         ),
 472
 473         TP_fast_assign(
 474                 __entry->dev            = bio->bi_bdev->bd_dev;
 475                 __entry->sector         = bio->bi_sector;
 476                 __entry->new_sector     = new_sector;
 477                 blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_size);
 478                 memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
 479         ),
 480
 481         TP_printk("%d,%d %s %llu / %llu [%s]",
 482                   MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
 483                   (unsigned long long)__entry->sector,
 484                   (unsigned long long)__entry->new_sector,
 485                   __entry->comm)
 486 );
 487
 488 /**
 489  * block_bio_remap - map request for a logical device to the raw device
 490  * @q: queue holding the operation
 491  * @bio: revised operation
 492  * @dev: device for the operation
 493  * @from: original sector for the operation
 494  *
 495  * An operation for a logical device has been mapped to the
 496  * raw block device.
 497  */
 498 TRACE_EVENT(block_bio_remap,
 499
 500         TP_PROTO(struct request_queue *q, struct bio *bio, dev_t dev,
 501                  sector_t from),
 502
 503         TP_ARGS(q, bio, dev, from),
 504
 505         TP_STRUCT__entry(
 506                 __field( dev_t,         dev             )
 507                 __field( sector_t,      sector          )
 508                 __field( unsigned int,  nr_sector       )
 509                 __field( dev_t,         old_dev         )
 510                 __field( sector_t,      old_sector      )
 511                 __array( char,          rwbs,   6       )
 512         ),
 513
 514         TP_fast_assign(
 515                 __entry->dev            = bio->bi_bdev->bd_dev;
 516                 __entry->sector         = bio->bi_sector;
 517                 __entry->nr_sector      = bio->bi_size >> 9;
 518                 __entry->old_dev        = dev;
 519                 __entry->old_sector     = from;
 520                 blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_size);
 521         ),
 522
 523         TP_printk("%d,%d %s %llu + %u <- (%d,%d) %llu",
 524                   MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
 525                   (unsigned long long)__entry->sector,
 526                   __entry->nr_sector,
 527                   MAJOR(__entry->old_dev), MINOR(__entry->old_dev),
 528                   (unsigned long long)__entry->old_sector)
 529 );
 530
 531 /**
 532  * block_rq_remap - map request for a block operation request
 533  * @q: queue holding the operation
 534  * @rq: block IO operation request
 535  * @dev: device for the operation
 536  * @from: original sector for the operation
 537  *
 538  * The block operation request @rq in @q has been remapped.  The block
 539  * operation request @rq holds the current information and @from hold
 540  * the original sector.
 541  */
 542 TRACE_EVENT(block_rq_remap,
 543
 544         TP_PROTO(struct request_queue *q, struct request *rq, dev_t dev,
 545                  sector_t from),
 546
 547         TP_ARGS(q, rq, dev, from),
 548
 549         TP_STRUCT__entry(
 550                 __field( dev_t,         dev             )
 551                 __field( sector_t,      sector          )
 552                 __field( unsigned int,  nr_sector       )
 553                 __field( dev_t,         old_dev         )
 554                 __field( sector_t,      old_sector      )
 555                 __array( char,          rwbs,   6       )
 556         ),
 557
 558         TP_fast_assign(
 559                 __entry->dev            = disk_devt(rq->rq_disk);
 560                 __entry->sector         = blk_rq_pos(rq);
 561                 __entry->nr_sector      = blk_rq_sectors(rq);
 562                 __entry->old_dev        = dev;
 563                 __entry->old_sector     = from;
 564                 blk_fill_rwbs_rq(__entry->rwbs, rq);
 565         ),
 566
 567         TP_printk("%d,%d %s %llu + %u <- (%d,%d) %llu",
 568                   MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs,
 569                   (unsigned long long)__entry->sector,
 570                   __entry->nr_sector,
 571                   MAJOR(__entry->old_dev), MINOR(__entry->old_dev),
 572                   (unsigned long long)__entry->old_sector)
 573 );
 574
 575 #endif /* _TRACE_BLOCK_H */
 576
 577 /* This part must be outside protection */
 578 #include <trace/define_trace.h>
 579