instrumentation/events/lttng-module/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 #include <linux/trace_seq.h>
  11 #include <linux/version.h>
  12
  13 #define RWBS_LEN        8
  14
  15 #ifndef _TRACE_BLOCK_DEF_
  16 #define _TRACE_BLOCK_DEF_
  17
  18 #define __blk_dump_cmd(cmd, len)        "<unknown>"
  19
  20 enum {
  21         RWBS_FLAG_WRITE         = (1 << 0),
  22         RWBS_FLAG_DISCARD       = (1 << 1),
  23         RWBS_FLAG_READ          = (1 << 2),
  24         RWBS_FLAG_RAHEAD        = (1 << 3),
  25         RWBS_FLAG_BARRIER       = (1 << 4),
  26         RWBS_FLAG_SYNC          = (1 << 5),
  27         RWBS_FLAG_META          = (1 << 6),
  28         RWBS_FLAG_SECURE        = (1 << 7),
  29         RWBS_FLAG_FLUSH         = (1 << 8),
  30         RWBS_FLAG_FUA           = (1 << 9),
  31 };
  32
  33 #endif /* _TRACE_BLOCK_DEF_ */
  34
  35 #define __print_rwbs_flags(rwbs)                \
  36         __print_flags(rwbs, "",                 \
  37                 { RWBS_FLAG_FLUSH, "F" },       \
  38                 { RWBS_FLAG_WRITE, "W" },       \
  39                 { RWBS_FLAG_DISCARD, "D" },     \
  40                 { RWBS_FLAG_READ, "R" },        \
  41                 { RWBS_FLAG_FUA, "F" },         \
  42                 { RWBS_FLAG_RAHEAD, "A" },      \
  43                 { RWBS_FLAG_BARRIER, "B" },     \
  44                 { RWBS_FLAG_SYNC, "S" },        \
  45                 { RWBS_FLAG_META, "M" },        \
  46                 { RWBS_FLAG_SECURE, "E" })
  47
  48 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,1,0))
  49
  50 #define blk_fill_rwbs(rwbs, rw, bytes)                                        \
  51                 tp_assign(rwbs, ((rw) & WRITE ? RWBS_FLAG_WRITE :             \
  52                         ( (rw) & REQ_DISCARD ? RWBS_FLAG_DISCARD :            \
  53                         ( (bytes) ? RWBS_FLAG_READ :                          \
  54                         ( 0 ))))                                              \
  55                         | ((rw) & REQ_RAHEAD ? RWBS_FLAG_RAHEAD : 0)          \
  56                         | ((rw) & REQ_SYNC ? RWBS_FLAG_SYNC : 0)              \
  57                         | ((rw) & REQ_META ? RWBS_FLAG_META : 0)              \
  58                         | ((rw) & REQ_SECURE ? RWBS_FLAG_SECURE : 0)          \
  59                         | ((rw) & REQ_FLUSH ? RWBS_FLAG_FLUSH : 0)            \
  60                         | ((rw) & REQ_FUA ? RWBS_FLAG_FUA : 0))
  61
  62 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37))
  63
  64 #define blk_fill_rwbs(rwbs, rw, bytes)                                        \
  65                 tp_assign(rwbs, ((rw) & WRITE ? RWBS_FLAG_WRITE :             \
  66                         ( (rw) & REQ_DISCARD ? RWBS_FLAG_DISCARD :            \
  67                         ( (bytes) ? RWBS_FLAG_READ :                          \
  68                         ( 0 ))))                                              \
  69                         | ((rw) & REQ_RAHEAD ? RWBS_FLAG_RAHEAD : 0)          \
  70                         | ((rw) & REQ_SYNC ? RWBS_FLAG_SYNC : 0)              \
  71                         | ((rw) & REQ_META ? RWBS_FLAG_META : 0)              \
  72                         | ((rw) & REQ_SECURE ? RWBS_FLAG_SECURE : 0))
  73
  74 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36))
  75
  76 #define blk_fill_rwbs(rwbs, rw, bytes)                                        \
  77                 tp_assign(rwbs, ((rw) & WRITE ? RWBS_FLAG_WRITE :             \
  78                         ( (rw) & REQ_DISCARD ? RWBS_FLAG_DISCARD :            \
  79                         ( (bytes) ? RWBS_FLAG_READ :                          \
  80                         ( 0 ))))                                              \
  81                         | ((rw) & REQ_RAHEAD ? RWBS_FLAG_RAHEAD : 0)          \
  82                         | ((rw) & REQ_HARDBARRIER ? RWBS_FLAG_BARRIER : 0)    \
  83                         | ((rw) & REQ_SYNC ? RWBS_FLAG_SYNC : 0)              \
  84                         | ((rw) & REQ_META ? RWBS_FLAG_META : 0)              \
  85                         | ((rw) & REQ_SECURE ? RWBS_FLAG_SECURE : 0))
  86
  87 #else
  88
  89 #define blk_fill_rwbs(rwbs, rw, bytes)                                        \
  90                 tp_assign(rwbs, ((rw) & WRITE ? RWBS_FLAG_WRITE :             \
  91                         ( (rw) & (1 << BIO_RW_DISCARD) ? RWBS_FLAG_DISCARD :  \
  92                         ( (bytes) ? RWBS_FLAG_READ :                          \
  93                         ( 0 ))))                                              \
  94                         | ((rw) & (1 << BIO_RW_AHEAD) ? RWBS_FLAG_RAHEAD : 0) \
  95                         | ((rw) & (1 << BIO_RW_SYNCIO) ? RWBS_FLAG_SYNC : 0)  \
  96                         | ((rw) & (1 << BIO_RW_META) ? RWBS_FLAG_META : 0)    \
  97                         | ((rw) & (1 << BIO_RW_BARRIER) ? RWBS_FLAG_BARRIER : 0))
  98
  99 #endif
 100
 101 DECLARE_EVENT_CLASS(block_rq_with_error,
 102
 103         TP_PROTO(struct request_queue *q, struct request *rq),
 104
 105         TP_ARGS(q, rq),
 106
 107         TP_STRUCT__entry(
 108                 __field(  dev_t,        dev                     )
 109                 __field(  sector_t,     sector                  )
 110                 __field(  unsigned int, nr_sector               )
 111                 __field(  int,          errors                  )
 112                 __field(  unsigned int, rwbs                    )
 113                 __dynamic_array_hex( unsigned char,     cmd,
 114                         (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
 115                                 rq->cmd_len : 0)
 116         ),
 117
 118         TP_fast_assign(
 119                 tp_assign(dev, rq->rq_disk ? disk_devt(rq->rq_disk) : 0)
 120                 tp_assign(sector, (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
 121                                         0 : blk_rq_pos(rq))
 122                 tp_assign(nr_sector, (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
 123                                         0 : blk_rq_sectors(rq))
 124                 tp_assign(errors, rq->errors)
 125                 blk_fill_rwbs(rwbs, rq->cmd_flags, blk_rq_bytes(rq))
 126                 tp_memcpy_dyn(cmd, (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
 127                                         rq->cmd : NULL);
 128         ),
 129
 130         TP_printk("%d,%d %s (%s) %llu + %u [%d]",
 131                   MAJOR(__entry->dev), MINOR(__entry->dev),
 132                   __print_rwbs_flags(__entry->rwbs),
 133                   __blk_dump_cmd(__get_dynamic_array(cmd),
 134                                  __get_dynamic_array_len(cmd)),
 135                   (unsigned long long)__entry->sector,
 136                   __entry->nr_sector, __entry->errors)
 137 )
 138
 139 /**
 140  * block_rq_abort - abort block operation request
 141  * @q: queue containing the block operation request
 142  * @rq: block IO operation request
 143  *
 144  * Called immediately after pending block IO operation request @rq in
 145  * queue @q is aborted. The fields in the operation request @rq
 146  * can be examined to determine which device and sectors the pending
 147  * operation would access.
 148  */
 149 DEFINE_EVENT(block_rq_with_error, block_rq_abort,
 150
 151         TP_PROTO(struct request_queue *q, struct request *rq),
 152
 153         TP_ARGS(q, rq)
 154 )
 155
 156 /**
 157  * block_rq_requeue - place block IO request back on a queue
 158  * @q: queue holding operation
 159  * @rq: block IO operation request
 160  *
 161  * The block operation request @rq is being placed back into queue
 162  * @q.  For some reason the request was not completed and needs to be
 163  * put back in the queue.
 164  */
 165 DEFINE_EVENT(block_rq_with_error, block_rq_requeue,
 166
 167         TP_PROTO(struct request_queue *q, struct request *rq),
 168
 169         TP_ARGS(q, rq)
 170 )
 171
 172 /**
 173  * block_rq_complete - block IO operation completed by device driver
 174  * @q: queue containing the block operation request
 175  * @rq: block operations request
 176  *
 177  * The block_rq_complete tracepoint event indicates that some portion
 178  * of operation request has been completed by the device driver.  If
 179  * the @rq->bio is %NULL, then there is absolutely no additional work to
 180  * do for the request. If @rq->bio is non-NULL then there is
 181  * additional work required to complete the request.
 182  */
 183 DEFINE_EVENT(block_rq_with_error, block_rq_complete,
 184
 185         TP_PROTO(struct request_queue *q, struct request *rq),
 186
 187         TP_ARGS(q, rq)
 188 )
 189
 190 DECLARE_EVENT_CLASS(block_rq,
 191
 192         TP_PROTO(struct request_queue *q, struct request *rq),
 193
 194         TP_ARGS(q, rq),
 195
 196         TP_STRUCT__entry(
 197                 __field(  dev_t,        dev                     )
 198                 __field(  sector_t,     sector                  )
 199                 __field(  unsigned int, nr_sector               )
 200                 __field(  unsigned int, bytes                   )
 201                 __field(  unsigned int, rwbs                    )
 202                 __array_text(  char,         comm,   TASK_COMM_LEN   )
 203                 __dynamic_array_hex( unsigned char,     cmd,
 204                         (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
 205                                 rq->cmd_len : 0)
 206         ),
 207
 208         TP_fast_assign(
 209                 tp_assign(dev, rq->rq_disk ? disk_devt(rq->rq_disk) : 0)
 210                 tp_assign(sector, (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
 211                                         0 : blk_rq_pos(rq))
 212                 tp_assign(nr_sector, (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
 213                                         0 : blk_rq_sectors(rq))
 214                 tp_assign(bytes, (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
 215                                         blk_rq_bytes(rq) : 0)
 216                 blk_fill_rwbs(rwbs, rq->cmd_flags, blk_rq_bytes(rq))
 217                 tp_memcpy_dyn(cmd, (rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
 218                                         rq->cmd : NULL);
 219                 tp_memcpy(comm, current->comm, TASK_COMM_LEN)
 220         ),
 221
 222         TP_printk("%d,%d %s %u (%s) %llu + %u [%s]",
 223                   MAJOR(__entry->dev), MINOR(__entry->dev),
 224                   __print_rwbs_flags(__entry->rwbs),
 225                   __entry->bytes,
 226                   __blk_dump_cmd(__get_dynamic_array(cmd),
 227                                  __get_dynamic_array_len(cmd)),
 228                   (unsigned long long)__entry->sector,
 229                   __entry->nr_sector, __entry->comm)
 230 )
 231
 232 /**
 233  * block_rq_insert - insert block operation request into queue
 234  * @q: target queue
 235  * @rq: block IO operation request
 236  *
 237  * Called immediately before block operation request @rq is inserted
 238  * into queue @q.  The fields in the operation request @rq struct can
 239  * be examined to determine which device and sectors the pending
 240  * operation would access.
 241  */
 242 DEFINE_EVENT(block_rq, block_rq_insert,
 243
 244         TP_PROTO(struct request_queue *q, struct request *rq),
 245
 246         TP_ARGS(q, rq)
 247 )
 248
 249 /**
 250  * block_rq_issue - issue pending block IO request operation to device driver
 251  * @q: queue holding operation
 252  * @rq: block IO operation operation request
 253  *
 254  * Called when block operation request @rq from queue @q is sent to a
 255  * device driver for processing.
 256  */
 257 DEFINE_EVENT(block_rq, block_rq_issue,
 258
 259         TP_PROTO(struct request_queue *q, struct request *rq),
 260
 261         TP_ARGS(q, rq)
 262 )
 263
 264 /**
 265  * block_bio_bounce - used bounce buffer when processing block operation
 266  * @q: queue holding the block operation
 267  * @bio: block operation
 268  *
 269  * A bounce buffer was used to handle the block operation @bio in @q.
 270  * This occurs when hardware limitations prevent a direct transfer of
 271  * data between the @bio data memory area and the IO device.  Use of a
 272  * bounce buffer requires extra copying of data and decreases
 273  * performance.
 274  */
 275 TRACE_EVENT(block_bio_bounce,
 276
 277         TP_PROTO(struct request_queue *q, struct bio *bio),
 278
 279         TP_ARGS(q, bio),
 280
 281         TP_STRUCT__entry(
 282                 __field( dev_t,         dev                     )
 283                 __field( sector_t,      sector                  )
 284                 __field( unsigned int,  nr_sector               )
 285                 __field( unsigned int,  rwbs                    )
 286                 __array_text( char,             comm,   TASK_COMM_LEN   )
 287         ),
 288
 289         TP_fast_assign(
 290                 tp_assign(dev, bio->bi_bdev ?
 291                                           bio->bi_bdev->bd_dev : 0)
 292                 tp_assign(sector, bio->bi_sector)
 293                 tp_assign(nr_sector, bio->bi_size >> 9)
 294                 blk_fill_rwbs(rwbs, bio->bi_rw, bio->bi_size)
 295                 tp_memcpy(comm, current->comm, TASK_COMM_LEN)
 296         ),
 297
 298         TP_printk("%d,%d %s %llu + %u [%s]",
 299                   MAJOR(__entry->dev), MINOR(__entry->dev),
 300                   __print_rwbs_flags(__entry->rwbs),
 301                   (unsigned long long)__entry->sector,
 302                   __entry->nr_sector, __entry->comm)
 303 )
 304
 305 /**
 306  * block_bio_complete - completed all work on the block operation
 307  * @q: queue holding the block operation
 308  * @bio: block operation completed
 309  * @error: io error value
 310  *
 311  * This tracepoint indicates there is no further work to do on this
 312  * block IO operation @bio.
 313  */
 314 TRACE_EVENT(block_bio_complete,
 315
 316 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,38))
 317         TP_PROTO(struct request_queue *q, struct bio *bio, int error),
 318
 319         TP_ARGS(q, bio, error),
 320 #else
 321         TP_PROTO(struct request_queue *q, struct bio *bio),
 322
 323         TP_ARGS(q, bio),
 324 #endif
 325
 326         TP_STRUCT__entry(
 327                 __field( dev_t,         dev             )
 328                 __field( sector_t,      sector          )
 329                 __field( unsigned,      nr_sector       )
 330                 __field( int,           error           )
 331                 __field( unsigned int,  rwbs            )
 332         ),
 333
 334         TP_fast_assign(
 335                 tp_assign(dev, bio->bi_bdev->bd_dev)
 336                 tp_assign(sector, bio->bi_sector)
 337                 tp_assign(nr_sector, bio->bi_size >> 9)
 338 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,38))
 339                 tp_assign(error, error)
 340 #else
 341                 tp_assign(error, 0)
 342 #endif
 343                 blk_fill_rwbs(rwbs, bio->bi_rw, bio->bi_size)
 344         ),
 345
 346         TP_printk("%d,%d %s %llu + %u [%d]",
 347                   MAJOR(__entry->dev), MINOR(__entry->dev),
 348                   __print_rwbs_flags(__entry->rwbs),
 349                   (unsigned long long)__entry->sector,
 350                   __entry->nr_sector, __entry->error)
 351 )
 352
 353 DECLARE_EVENT_CLASS(block_bio,
 354
 355         TP_PROTO(struct request_queue *q, struct bio *bio),
 356
 357         TP_ARGS(q, bio),
 358
 359         TP_STRUCT__entry(
 360                 __field( dev_t,         dev                     )
 361                 __field( sector_t,      sector                  )
 362                 __field( unsigned int,  nr_sector               )
 363                 __field( unsigned int,  rwbs                    )
 364                 __array_text( char,             comm,   TASK_COMM_LEN   )
 365         ),
 366
 367         TP_fast_assign(
 368                 tp_assign(dev, bio->bi_bdev->bd_dev)
 369                 tp_assign(sector, bio->bi_sector)
 370                 tp_assign(nr_sector, bio->bi_size >> 9)
 371                 blk_fill_rwbs(rwbs, bio->bi_rw, bio->bi_size)
 372                 tp_memcpy(comm, current->comm, TASK_COMM_LEN)
 373         ),
 374
 375         TP_printk("%d,%d %s %llu + %u [%s]",
 376                   MAJOR(__entry->dev), MINOR(__entry->dev),
 377                   __print_rwbs_flags(__entry->rwbs),
 378                   (unsigned long long)__entry->sector,
 379                   __entry->nr_sector, __entry->comm)
 380 )
 381
 382 /**
 383  * block_bio_backmerge - merging block operation to the end of an existing operation
 384  * @q: queue holding operation
 385  * @bio: new block operation to merge
 386  *
 387  * Merging block request @bio to the end of an existing block request
 388  * in queue @q.
 389  */
 390 DEFINE_EVENT(block_bio, block_bio_backmerge,
 391
 392 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,9,0))
 393         TP_PROTO(struct request_queue *q, struct request *rq, struct bio *bio),
 394
 395         TP_ARGS(q, rq, bio)
 396 #else
 397         TP_PROTO(struct request_queue *q, struct bio *bio),
 398
 399         TP_ARGS(q, bio)
 400 #endif
 401 )
 402
 403 /**
 404  * block_bio_frontmerge - merging block operation to the beginning of an existing operation
 405  * @q: queue holding operation
 406  * @bio: new block operation to merge
 407  *
 408  * Merging block IO operation @bio to the beginning of an existing block
 409  * operation in queue @q.
 410  */
 411 DEFINE_EVENT(block_bio, block_bio_frontmerge,
 412
 413 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,9,0))
 414         TP_PROTO(struct request_queue *q, struct request *rq, struct bio *bio),
 415
 416         TP_ARGS(q, rq, bio)
 417 #else
 418         TP_PROTO(struct request_queue *q, struct bio *bio),
 419
 420         TP_ARGS(q, bio)
 421 #endif
 422 )
 423
 424 /**
 425  * block_bio_queue - putting new block IO operation in queue
 426  * @q: queue holding operation
 427  * @bio: new block operation
 428  *
 429  * About to place the block IO operation @bio into queue @q.
 430  */
 431 DEFINE_EVENT(block_bio, block_bio_queue,
 432
 433         TP_PROTO(struct request_queue *q, struct bio *bio),
 434
 435         TP_ARGS(q, bio)
 436 )
 437
 438 DECLARE_EVENT_CLASS(block_get_rq,
 439
 440         TP_PROTO(struct request_queue *q, struct bio *bio, int rw),
 441
 442         TP_ARGS(q, bio, rw),
 443
 444         TP_STRUCT__entry(
 445                 __field( dev_t,         dev                     )
 446                 __field( sector_t,      sector                  )
 447                 __field( unsigned int,  nr_sector               )
 448                 __field( unsigned int,  rwbs                    )
 449                 __array_text( char,             comm,   TASK_COMM_LEN   )
 450         ),
 451
 452         TP_fast_assign(
 453                 tp_assign(dev, bio ? bio->bi_bdev->bd_dev : 0)
 454                 tp_assign(sector, bio ? bio->bi_sector : 0)
 455                 tp_assign(nr_sector, bio ? bio->bi_size >> 9 : 0)
 456                 blk_fill_rwbs(rwbs, bio ? bio->bi_rw : 0,
 457                               bio ? bio->bi_size >> 9 : 0)
 458                 tp_memcpy(comm, current->comm, TASK_COMM_LEN)
 459         ),
 460
 461         TP_printk("%d,%d %s %llu + %u [%s]",
 462                   MAJOR(__entry->dev), MINOR(__entry->dev),
 463                   __print_rwbs_flags(__entry->rwbs),
 464                   (unsigned long long)__entry->sector,
 465                   __entry->nr_sector, __entry->comm)
 466 )
 467
 468 /**
 469  * block_getrq - get a free request entry in queue for block IO operations
 470  * @q: queue for operations
 471  * @bio: pending block IO operation
 472  * @rw: low bit indicates a read (%0) or a write (%1)
 473  *
 474  * A request struct for queue @q has been allocated to handle the
 475  * block IO operation @bio.
 476  */
 477 DEFINE_EVENT(block_get_rq, block_getrq,
 478
 479         TP_PROTO(struct request_queue *q, struct bio *bio, int rw),
 480
 481         TP_ARGS(q, bio, rw)
 482 )
 483
 484 /**
 485  * block_sleeprq - waiting to get a free request entry in queue for block IO operation
 486  * @q: queue for operation
 487  * @bio: pending block IO operation
 488  * @rw: low bit indicates a read (%0) or a write (%1)
 489  *
 490  * In the case where a request struct cannot be provided for queue @q
 491  * the process needs to wait for an request struct to become
 492  * available.  This tracepoint event is generated each time the
 493  * process goes to sleep waiting for request struct become available.
 494  */
 495 DEFINE_EVENT(block_get_rq, block_sleeprq,
 496
 497         TP_PROTO(struct request_queue *q, struct bio *bio, int rw),
 498
 499         TP_ARGS(q, bio, rw)
 500 )
 501
 502 /**
 503  * block_plug - keep operations requests in request queue
 504  * @q: request queue to plug
 505  *
 506  * Plug the request queue @q.  Do not allow block operation requests
 507  * to be sent to the device driver. Instead, accumulate requests in
 508  * the queue to improve throughput performance of the block device.
 509  */
 510 TRACE_EVENT(block_plug,
 511
 512         TP_PROTO(struct request_queue *q),
 513
 514         TP_ARGS(q),
 515
 516         TP_STRUCT__entry(
 517                 __array_text( char,             comm,   TASK_COMM_LEN   )
 518         ),
 519
 520         TP_fast_assign(
 521                 tp_memcpy(comm, current->comm, TASK_COMM_LEN)
 522         ),
 523
 524         TP_printk("[%s]", __entry->comm)
 525 )
 526
 527 DECLARE_EVENT_CLASS(block_unplug,
 528
 529 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,39))
 530         TP_PROTO(struct request_queue *q, unsigned int depth, bool explicit),
 531
 532         TP_ARGS(q, depth, explicit),
 533 #else
 534         TP_PROTO(struct request_queue *q),
 535
 536         TP_ARGS(q),
 537 #endif
 538
 539         TP_STRUCT__entry(
 540                 __field( int,           nr_rq                   )
 541                 __array_text( char,             comm,   TASK_COMM_LEN   )
 542         ),
 543
 544         TP_fast_assign(
 545 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,39))
 546                 tp_assign(nr_rq, depth)
 547 #else
 548                 tp_assign(nr_rq, q->rq.count[READ] + q->rq.count[WRITE])
 549 #endif
 550                 tp_memcpy(comm, current->comm, TASK_COMM_LEN)
 551         ),
 552
 553         TP_printk("[%s] %d", __entry->comm, __entry->nr_rq)
 554 )
 555
 556 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,39))
 557 /**
 558  * block_unplug_timer - timed release of operations requests in queue to device driver
 559  * @q: request queue to unplug
 560  *
 561  * Unplug the request queue @q because a timer expired and allow block
 562  * operation requests to be sent to the device driver.
 563  */
 564 DEFINE_EVENT(block_unplug, block_unplug_timer,
 565
 566         TP_PROTO(struct request_queue *q),
 567
 568         TP_ARGS(q)
 569 )
 570 #endif
 571
 572 /**
 573  * block_unplug - release of operations requests in request queue
 574  * @q: request queue to unplug
 575  * @depth: number of requests just added to the queue
 576  * @explicit: whether this was an explicit unplug, or one from schedule()
 577  *
 578  * Unplug request queue @q because device driver is scheduled to work
 579  * on elements in the request queue.
 580  */
 581 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,39))
 582 DEFINE_EVENT(block_unplug, block_unplug,
 583 #else
 584 DEFINE_EVENT(block_unplug, block_unplug_io,
 585 #endif
 586
 587 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,39))
 588         TP_PROTO(struct request_queue *q, unsigned int depth, bool explicit),
 589
 590         TP_ARGS(q, depth, explicit)
 591 #else
 592         TP_PROTO(struct request_queue *q),
 593
 594         TP_ARGS(q)
 595 #endif
 596 )
 597
 598 /**
 599  * block_split - split a single bio struct into two bio structs
 600  * @q: queue containing the bio
 601  * @bio: block operation being split
 602  * @new_sector: The starting sector for the new bio
 603  *
 604  * The bio request @bio in request queue @q needs to be split into two
 605  * bio requests. The newly created @bio request starts at
 606  * @new_sector. This split may be required due to hardware limitation
 607  * such as operation crossing device boundaries in a RAID system.
 608  */
 609 TRACE_EVENT(block_split,
 610
 611         TP_PROTO(struct request_queue *q, struct bio *bio,
 612                  unsigned int new_sector),
 613
 614         TP_ARGS(q, bio, new_sector),
 615
 616         TP_STRUCT__entry(
 617                 __field( dev_t,         dev                             )
 618                 __field( sector_t,      sector                          )
 619                 __field( sector_t,      new_sector                      )
 620                 __field( unsigned int,  rwbs            )
 621                 __array_text( char,             comm,           TASK_COMM_LEN   )
 622         ),
 623
 624         TP_fast_assign(
 625                 tp_assign(dev, bio->bi_bdev->bd_dev)
 626                 tp_assign(sector, bio->bi_sector)
 627                 tp_assign(new_sector, new_sector)
 628                 blk_fill_rwbs(rwbs, bio->bi_rw, bio->bi_size)
 629                 tp_memcpy(comm, current->comm, TASK_COMM_LEN)
 630         ),
 631
 632         TP_printk("%d,%d %s %llu / %llu [%s]",
 633                   MAJOR(__entry->dev), MINOR(__entry->dev),
 634                   __print_rwbs_flags(__entry->rwbs),
 635                   (unsigned long long)__entry->sector,
 636                   (unsigned long long)__entry->new_sector,
 637                   __entry->comm)
 638 )
 639
 640 /**
 641  * block_bio_remap - map request for a logical device to the raw device
 642  * @q: queue holding the operation
 643  * @bio: revised operation
 644  * @dev: device for the operation
 645  * @from: original sector for the operation
 646  *
 647  * An operation for a logical device has been mapped to the
 648  * raw block device.
 649  */
 650 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,38))
 651 TRACE_EVENT(block_bio_remap,
 652 #else
 653 TRACE_EVENT(block_remap,
 654 #endif
 655
 656         TP_PROTO(struct request_queue *q, struct bio *bio, dev_t dev,
 657                  sector_t from),
 658
 659         TP_ARGS(q, bio, dev, from),
 660
 661         TP_STRUCT__entry(
 662                 __field( dev_t,         dev             )
 663                 __field( sector_t,      sector          )
 664                 __field( unsigned int,  nr_sector       )
 665                 __field( dev_t,         old_dev         )
 666                 __field( sector_t,      old_sector      )
 667                 __field( unsigned int,  rwbs            )
 668         ),
 669
 670         TP_fast_assign(
 671                 tp_assign(dev, bio->bi_bdev->bd_dev)
 672                 tp_assign(sector, bio->bi_sector)
 673                 tp_assign(nr_sector, bio->bi_size >> 9)
 674                 tp_assign(old_dev, dev)
 675                 tp_assign(old_sector, from)
 676                 blk_fill_rwbs(rwbs, bio->bi_rw, bio->bi_size)
 677         ),
 678
 679         TP_printk("%d,%d %s %llu + %u <- (%d,%d) %llu",
 680                   MAJOR(__entry->dev), MINOR(__entry->dev),
 681                   __print_rwbs_flags(__entry->rwbs),
 682                   (unsigned long long)__entry->sector,
 683                   __entry->nr_sector,
 684                   MAJOR(__entry->old_dev), MINOR(__entry->old_dev),
 685                   (unsigned long long)__entry->old_sector)
 686 )
 687
 688 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32))
 689 /**
 690  * block_rq_remap - map request for a block operation request
 691  * @q: queue holding the operation
 692  * @rq: block IO operation request
 693  * @dev: device for the operation
 694  * @from: original sector for the operation
 695  *
 696  * The block operation request @rq in @q has been remapped.  The block
 697  * operation request @rq holds the current information and @from hold
 698  * the original sector.
 699  */
 700 TRACE_EVENT(block_rq_remap,
 701
 702         TP_PROTO(struct request_queue *q, struct request *rq, dev_t dev,
 703                  sector_t from),
 704
 705         TP_ARGS(q, rq, dev, from),
 706
 707         TP_STRUCT__entry(
 708                 __field( dev_t,         dev             )
 709                 __field( sector_t,      sector          )
 710                 __field( unsigned int,  nr_sector       )
 711                 __field( dev_t,         old_dev         )
 712                 __field( sector_t,      old_sector      )
 713                 __field( unsigned int,  rwbs            )
 714         ),
 715
 716         TP_fast_assign(
 717                 tp_assign(dev, disk_devt(rq->rq_disk))
 718                 tp_assign(sector, blk_rq_pos(rq))
 719                 tp_assign(nr_sector, blk_rq_sectors(rq))
 720                 tp_assign(old_dev, dev)
 721                 tp_assign(old_sector, from)
 722                 blk_fill_rwbs(rwbs, rq->cmd_flags, blk_rq_bytes(rq))
 723         ),
 724
 725         TP_printk("%d,%d %s %llu + %u <- (%d,%d) %llu",
 726                   MAJOR(__entry->dev), MINOR(__entry->dev),
 727                   __print_rwbs_flags(__entry->rwbs),
 728                   (unsigned long long)__entry->sector,
 729                   __entry->nr_sector,
 730                   MAJOR(__entry->old_dev), MINOR(__entry->old_dev),
 731                   (unsigned long long)__entry->old_sector)
 732 )
 733 #endif
 734
 735 #undef __print_rwbs_flags
 736 #undef blk_fill_rwbs
 737
 738 #endif /* _TRACE_BLOCK_H */
 739
 740 /* This part must be outside protection */
 741 #include "../../../probes/define_trace.h"
 742