Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 1 | /* |
| 2 | * The io parts of the fio tool, includes workers for sync and mmap'ed |
| 3 | * io, as well as both posix and linux libaio support. |
| 4 | * |
| 5 | * sync io is implemented on top of aio. |
| 6 | * |
| 7 | * This is not really specific to fio, if the get_io_u/put_io_u and |
| 8 | * structures was pulled into this as well it would be a perfectly |
| 9 | * generic io engine that could be used for other projects. |
| 10 | * |
| 11 | */ |
| 12 | #include <stdio.h> |
| 13 | #include <stdlib.h> |
| 14 | #include <unistd.h> |
| 15 | #include <errno.h> |
| 16 | #include <assert.h> |
| 17 | #include <time.h> |
| 18 | #include <sys/mman.h> |
Jens Axboe | b1ff340 | 2006-02-17 11:35:58 +0100 | [diff] [blame] | 19 | #include <sys/poll.h> |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 20 | #include "fio.h" |
| 21 | #include "os.h" |
| 22 | |
| 23 | #ifdef FIO_HAVE_LIBAIO |
| 24 | |
| 25 | #define ev_to_iou(ev) (struct io_u *) ((unsigned long) (ev)->obj) |
| 26 | |
| 27 | static int fio_io_sync(struct thread_data *td) |
| 28 | { |
| 29 | return fsync(td->fd); |
| 30 | } |
| 31 | |
| 32 | static int fill_timespec(struct timespec *ts) |
| 33 | { |
| 34 | #ifdef _POSIX_TIMERS |
| 35 | if (!clock_gettime(CLOCK_MONOTONIC, ts)) |
| 36 | return 0; |
| 37 | |
| 38 | perror("clock_gettime"); |
| 39 | #endif |
| 40 | return 1; |
| 41 | } |
| 42 | |
| 43 | static unsigned long long ts_utime_since_now(struct timespec *t) |
| 44 | { |
| 45 | long long sec, nsec; |
| 46 | struct timespec now; |
| 47 | |
| 48 | if (fill_timespec(&now)) |
| 49 | return 0; |
| 50 | |
| 51 | sec = now.tv_sec - t->tv_sec; |
| 52 | nsec = now.tv_nsec - t->tv_nsec; |
| 53 | if (sec > 0 && nsec < 0) { |
| 54 | sec--; |
| 55 | nsec += 1000000000; |
| 56 | } |
| 57 | |
| 58 | sec *= 1000000; |
| 59 | nsec /= 1000; |
| 60 | return sec + nsec; |
| 61 | } |
| 62 | |
| 63 | struct libaio_data { |
| 64 | io_context_t aio_ctx; |
| 65 | struct io_event *aio_events; |
| 66 | }; |
| 67 | |
| 68 | static int fio_libaio_io_prep(struct thread_data *td, struct io_u *io_u) |
| 69 | { |
| 70 | if (io_u->ddir == DDIR_READ) |
| 71 | io_prep_pread(&io_u->iocb, td->fd, io_u->buf, io_u->buflen, io_u->offset); |
| 72 | else |
| 73 | io_prep_pwrite(&io_u->iocb, td->fd, io_u->buf, io_u->buflen, io_u->offset); |
| 74 | |
| 75 | return 0; |
| 76 | } |
| 77 | |
| 78 | static struct io_u *fio_libaio_event(struct thread_data *td, int event) |
| 79 | { |
| 80 | struct libaio_data *ld = td->io_data; |
| 81 | |
| 82 | return ev_to_iou(ld->aio_events + event); |
| 83 | } |
| 84 | |
| 85 | static int fio_libaio_getevents(struct thread_data *td, int min, int max, |
| 86 | struct timespec *t) |
| 87 | { |
| 88 | struct libaio_data *ld = td->io_data; |
| 89 | int r; |
| 90 | |
| 91 | do { |
| 92 | r = io_getevents(ld->aio_ctx, min, max, ld->aio_events, t); |
| 93 | if (r == -EAGAIN) { |
| 94 | usleep(100); |
| 95 | continue; |
| 96 | } else if (r == -EINTR) |
| 97 | continue; |
| 98 | else |
| 99 | break; |
| 100 | } while (1); |
| 101 | |
| 102 | return r; |
| 103 | } |
| 104 | |
| 105 | static int fio_libaio_queue(struct thread_data *td, struct io_u *io_u) |
| 106 | { |
| 107 | struct libaio_data *ld = td->io_data; |
| 108 | struct iocb *iocb = &io_u->iocb; |
| 109 | int ret; |
| 110 | |
| 111 | do { |
| 112 | ret = io_submit(ld->aio_ctx, 1, &iocb); |
| 113 | if (ret == 1) |
| 114 | return 0; |
| 115 | else if (ret == -EAGAIN) |
| 116 | usleep(100); |
| 117 | else if (ret == -EINTR) |
| 118 | continue; |
| 119 | else |
| 120 | break; |
| 121 | } while (1); |
| 122 | |
| 123 | return ret; |
| 124 | |
| 125 | } |
| 126 | |
| 127 | static int fio_libaio_cancel(struct thread_data *td, struct io_u *io_u) |
| 128 | { |
| 129 | struct libaio_data *ld = td->io_data; |
| 130 | |
| 131 | return io_cancel(ld->aio_ctx, &io_u->iocb, ld->aio_events); |
| 132 | } |
| 133 | |
| 134 | static void fio_libaio_cleanup(struct thread_data *td) |
| 135 | { |
| 136 | struct libaio_data *ld = td->io_data; |
| 137 | |
| 138 | if (ld) { |
| 139 | io_destroy(ld->aio_ctx); |
| 140 | if (ld->aio_events) |
| 141 | free(ld->aio_events); |
| 142 | |
| 143 | free(ld); |
| 144 | td->io_data = NULL; |
| 145 | } |
| 146 | } |
| 147 | |
| 148 | int fio_libaio_init(struct thread_data *td) |
| 149 | { |
| 150 | struct libaio_data *ld = malloc(sizeof(*ld)); |
| 151 | |
| 152 | memset(ld, 0, sizeof(*ld)); |
| 153 | if (io_queue_init(td->iodepth, &ld->aio_ctx)) { |
| 154 | td_verror(td, errno); |
| 155 | return 1; |
| 156 | } |
| 157 | |
| 158 | td->io_prep = fio_libaio_io_prep; |
| 159 | td->io_queue = fio_libaio_queue; |
| 160 | td->io_getevents = fio_libaio_getevents; |
| 161 | td->io_event = fio_libaio_event; |
| 162 | td->io_cancel = fio_libaio_cancel; |
| 163 | td->io_cleanup = fio_libaio_cleanup; |
| 164 | td->io_sync = fio_io_sync; |
| 165 | |
| 166 | ld->aio_events = malloc(td->iodepth * sizeof(struct io_event)); |
| 167 | td->io_data = ld; |
| 168 | return 0; |
| 169 | } |
| 170 | |
| 171 | #else /* FIO_HAVE_LIBAIO */ |
| 172 | |
| 173 | int fio_libaio_init(struct thread_data *td) |
| 174 | { |
| 175 | return EINVAL; |
| 176 | } |
| 177 | |
| 178 | #endif /* FIO_HAVE_LIBAIO */ |
| 179 | |
| 180 | #ifdef FIO_HAVE_POSIXAIO |
| 181 | |
| 182 | struct posixaio_data { |
| 183 | struct io_u **aio_events; |
| 184 | }; |
| 185 | |
| 186 | static int fio_posixaio_cancel(struct thread_data *td, struct io_u *io_u) |
| 187 | { |
| 188 | int r = aio_cancel(td->fd, &io_u->aiocb); |
| 189 | |
| 190 | if (r == 1 || r == AIO_CANCELED) |
| 191 | return 0; |
| 192 | |
| 193 | return 1; |
| 194 | } |
| 195 | |
| 196 | static int fio_posixaio_prep(struct thread_data *td, struct io_u *io_u) |
| 197 | { |
| 198 | struct aiocb *aiocb = &io_u->aiocb; |
| 199 | |
| 200 | aiocb->aio_fildes = td->fd; |
| 201 | aiocb->aio_buf = io_u->buf; |
| 202 | aiocb->aio_nbytes = io_u->buflen; |
| 203 | aiocb->aio_offset = io_u->offset; |
| 204 | |
| 205 | io_u->seen = 0; |
| 206 | return 0; |
| 207 | } |
| 208 | |
| 209 | static int fio_posixaio_getevents(struct thread_data *td, int min, int max, |
| 210 | struct timespec *t) |
| 211 | { |
| 212 | struct posixaio_data *pd = td->io_data; |
| 213 | struct list_head *entry; |
| 214 | struct timespec start; |
| 215 | int r, have_timeout = 0; |
| 216 | |
| 217 | if (t && !fill_timespec(&start)) |
| 218 | have_timeout = 1; |
| 219 | |
| 220 | r = 0; |
| 221 | restart: |
| 222 | list_for_each(entry, &td->io_u_busylist) { |
| 223 | struct io_u *io_u = list_entry(entry, struct io_u, list); |
| 224 | int err; |
| 225 | |
| 226 | if (io_u->seen) |
| 227 | continue; |
| 228 | |
| 229 | err = aio_error(&io_u->aiocb); |
| 230 | switch (err) { |
| 231 | default: |
| 232 | io_u->error = err; |
| 233 | case ECANCELED: |
| 234 | case 0: |
| 235 | pd->aio_events[r++] = io_u; |
| 236 | io_u->seen = 1; |
| 237 | break; |
| 238 | case EINPROGRESS: |
| 239 | break; |
| 240 | } |
| 241 | |
| 242 | if (r >= max) |
| 243 | break; |
| 244 | } |
| 245 | |
| 246 | if (r >= min) |
| 247 | return r; |
| 248 | |
| 249 | if (have_timeout) { |
| 250 | unsigned long long usec; |
| 251 | |
| 252 | usec = (t->tv_sec * 1000000) + (t->tv_nsec / 1000); |
| 253 | if (ts_utime_since_now(&start) > usec) |
| 254 | return r; |
| 255 | } |
| 256 | |
| 257 | /* |
| 258 | * hrmpf, we need to wait for more. we should use aio_suspend, for |
| 259 | * now just sleep a little and recheck status of busy-and-not-seen |
| 260 | */ |
| 261 | usleep(1000); |
| 262 | goto restart; |
| 263 | } |
| 264 | |
| 265 | static struct io_u *fio_posixaio_event(struct thread_data *td, int event) |
| 266 | { |
| 267 | struct posixaio_data *pd = td->io_data; |
| 268 | |
| 269 | return pd->aio_events[event]; |
| 270 | } |
| 271 | |
| 272 | static int fio_posixaio_queue(struct thread_data *td, struct io_u *io_u) |
| 273 | { |
| 274 | struct aiocb *aiocb = &io_u->aiocb; |
| 275 | int ret; |
| 276 | |
| 277 | if (io_u->ddir == DDIR_READ) |
| 278 | ret = aio_read(aiocb); |
| 279 | else |
| 280 | ret = aio_write(aiocb); |
| 281 | |
| 282 | if (ret) |
| 283 | io_u->error = errno; |
| 284 | |
| 285 | return io_u->error; |
| 286 | } |
| 287 | |
| 288 | static void fio_posixaio_cleanup(struct thread_data *td) |
| 289 | { |
| 290 | struct posixaio_data *pd = td->io_data; |
| 291 | |
| 292 | if (pd) { |
| 293 | free(pd->aio_events); |
| 294 | free(pd); |
| 295 | td->io_data = NULL; |
| 296 | } |
| 297 | } |
| 298 | |
| 299 | int fio_posixaio_init(struct thread_data *td) |
| 300 | { |
| 301 | struct posixaio_data *pd = malloc(sizeof(*pd)); |
| 302 | |
| 303 | pd->aio_events = malloc(td->iodepth * sizeof(struct io_u *)); |
| 304 | |
| 305 | td->io_prep = fio_posixaio_prep; |
| 306 | td->io_queue = fio_posixaio_queue; |
| 307 | td->io_getevents = fio_posixaio_getevents; |
| 308 | td->io_event = fio_posixaio_event; |
| 309 | td->io_cancel = fio_posixaio_cancel; |
| 310 | td->io_cleanup = fio_posixaio_cleanup; |
| 311 | td->io_sync = fio_io_sync; |
| 312 | |
| 313 | td->io_data = pd; |
| 314 | return 0; |
| 315 | } |
| 316 | |
| 317 | #else /* FIO_HAVE_POSIXAIO */ |
| 318 | |
| 319 | int fio_posixaio_init(struct thread_data *td) |
| 320 | { |
| 321 | return EINVAL; |
| 322 | } |
| 323 | |
| 324 | #endif /* FIO_HAVE_POSIXAIO */ |
| 325 | |
| 326 | struct syncio_data { |
| 327 | struct io_u *last_io_u; |
| 328 | }; |
| 329 | |
| 330 | static int fio_syncio_getevents(struct thread_data *td, int min, int max, |
| 331 | struct timespec *t) |
| 332 | { |
| 333 | assert(max <= 1); |
| 334 | |
| 335 | /* |
| 336 | * we can only have one finished io_u for sync io, since the depth |
| 337 | * is always 1 |
| 338 | */ |
| 339 | if (list_empty(&td->io_u_busylist)) |
| 340 | return 0; |
| 341 | |
| 342 | return 1; |
| 343 | } |
| 344 | |
| 345 | static struct io_u *fio_syncio_event(struct thread_data *td, int event) |
| 346 | { |
| 347 | struct syncio_data *sd = td->io_data; |
| 348 | |
| 349 | assert(event == 0); |
| 350 | |
| 351 | return sd->last_io_u; |
| 352 | } |
| 353 | |
| 354 | static int fio_syncio_prep(struct thread_data *td, struct io_u *io_u) |
| 355 | { |
Jens Axboe | 77cf845 | 2005-12-08 20:09:36 +0100 | [diff] [blame] | 356 | if (lseek(td->fd, io_u->offset, SEEK_SET) == -1) { |
| 357 | td_verror(td, errno); |
| 358 | return 1; |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 359 | } |
| 360 | |
| 361 | return 0; |
| 362 | } |
| 363 | |
| 364 | static int fio_syncio_queue(struct thread_data *td, struct io_u *io_u) |
| 365 | { |
| 366 | struct syncio_data *sd = td->io_data; |
| 367 | int ret; |
| 368 | |
| 369 | if (io_u->ddir == DDIR_READ) |
| 370 | ret = read(td->fd, io_u->buf, io_u->buflen); |
| 371 | else |
| 372 | ret = write(td->fd, io_u->buf, io_u->buflen); |
| 373 | |
| 374 | if ((unsigned int) ret != io_u->buflen) { |
| 375 | if (ret > 0) { |
| 376 | io_u->resid = io_u->buflen - ret; |
| 377 | io_u->error = ENODATA; |
| 378 | } else |
| 379 | io_u->error = errno; |
| 380 | } |
| 381 | |
| 382 | if (!io_u->error) |
| 383 | sd->last_io_u = io_u; |
| 384 | |
| 385 | return io_u->error; |
| 386 | } |
| 387 | |
| 388 | static void fio_syncio_cleanup(struct thread_data *td) |
| 389 | { |
| 390 | if (td->io_data) { |
| 391 | free(td->io_data); |
| 392 | td->io_data = NULL; |
| 393 | } |
| 394 | } |
| 395 | |
| 396 | int fio_syncio_init(struct thread_data *td) |
| 397 | { |
| 398 | struct syncio_data *sd = malloc(sizeof(*sd)); |
| 399 | |
| 400 | td->io_prep = fio_syncio_prep; |
| 401 | td->io_queue = fio_syncio_queue; |
| 402 | td->io_getevents = fio_syncio_getevents; |
| 403 | td->io_event = fio_syncio_event; |
| 404 | td->io_cancel = NULL; |
| 405 | td->io_cleanup = fio_syncio_cleanup; |
| 406 | td->io_sync = fio_io_sync; |
| 407 | |
| 408 | sd->last_io_u = NULL; |
| 409 | td->io_data = sd; |
| 410 | return 0; |
| 411 | } |
| 412 | |
| 413 | static int fio_mmapio_queue(struct thread_data *td, struct io_u *io_u) |
| 414 | { |
| 415 | unsigned long long real_off = io_u->offset - td->file_offset; |
| 416 | struct syncio_data *sd = td->io_data; |
| 417 | |
| 418 | if (io_u->ddir == DDIR_READ) |
| 419 | memcpy(io_u->buf, td->mmap + real_off, io_u->buflen); |
| 420 | else |
| 421 | memcpy(td->mmap + real_off, io_u->buf, io_u->buflen); |
| 422 | |
| 423 | /* |
| 424 | * not really direct, but should drop the pages from the cache |
| 425 | */ |
| 426 | if (td->odirect) { |
| 427 | if (msync(td->mmap + real_off, io_u->buflen, MS_SYNC) < 0) |
| 428 | io_u->error = errno; |
| 429 | if (madvise(td->mmap + real_off, io_u->buflen, MADV_DONTNEED) < 0) |
| 430 | io_u->error = errno; |
| 431 | } |
| 432 | |
| 433 | if (!io_u->error) |
| 434 | sd->last_io_u = io_u; |
| 435 | |
| 436 | return io_u->error; |
| 437 | } |
| 438 | |
| 439 | static int fio_mmapio_sync(struct thread_data *td) |
| 440 | { |
| 441 | return msync(td->mmap, td->file_size, MS_SYNC); |
| 442 | } |
| 443 | |
| 444 | int fio_mmapio_init(struct thread_data *td) |
| 445 | { |
| 446 | struct syncio_data *sd = malloc(sizeof(*sd)); |
| 447 | |
| 448 | td->io_prep = NULL; |
| 449 | td->io_queue = fio_mmapio_queue; |
| 450 | td->io_getevents = fio_syncio_getevents; |
| 451 | td->io_event = fio_syncio_event; |
| 452 | td->io_cancel = NULL; |
| 453 | td->io_cleanup = fio_syncio_cleanup; |
| 454 | td->io_sync = fio_mmapio_sync; |
| 455 | |
| 456 | sd->last_io_u = NULL; |
| 457 | td->io_data = sd; |
| 458 | return 0; |
| 459 | } |
| 460 | |
| 461 | #ifdef FIO_HAVE_SGIO |
| 462 | |
Jens Axboe | b1ff340 | 2006-02-17 11:35:58 +0100 | [diff] [blame] | 463 | struct sgio_cmd { |
Jens Axboe | 5f2b7b5 | 2006-02-17 11:34:47 +0100 | [diff] [blame] | 464 | unsigned char cdb[10]; |
Jens Axboe | b1ff340 | 2006-02-17 11:35:58 +0100 | [diff] [blame] | 465 | int nr; |
| 466 | }; |
| 467 | |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 468 | struct sgio_data { |
Jens Axboe | b1ff340 | 2006-02-17 11:35:58 +0100 | [diff] [blame] | 469 | struct sgio_cmd *cmds; |
| 470 | struct io_u **events; |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 471 | unsigned int bs; |
| 472 | }; |
| 473 | |
Jens Axboe | b1ff340 | 2006-02-17 11:35:58 +0100 | [diff] [blame] | 474 | static void sgio_hdr_init(struct sgio_data *sd, struct sg_io_hdr *hdr, |
| 475 | struct io_u *io_u, int fs) |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 476 | { |
Jens Axboe | b1ff340 | 2006-02-17 11:35:58 +0100 | [diff] [blame] | 477 | struct sgio_cmd *sc = &sd->cmds[io_u->index]; |
| 478 | |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 479 | memset(hdr, 0, sizeof(*hdr)); |
Jens Axboe | b1ff340 | 2006-02-17 11:35:58 +0100 | [diff] [blame] | 480 | memset(sc->cdb, 0, sizeof(sc->cdb)); |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 481 | |
| 482 | hdr->interface_id = 'S'; |
Jens Axboe | b1ff340 | 2006-02-17 11:35:58 +0100 | [diff] [blame] | 483 | hdr->cmdp = sc->cdb; |
| 484 | hdr->cmd_len = sizeof(sc->cdb); |
| 485 | hdr->pack_id = io_u->index; |
| 486 | hdr->usr_ptr = io_u; |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 487 | |
Jens Axboe | b1ff340 | 2006-02-17 11:35:58 +0100 | [diff] [blame] | 488 | if (fs) { |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 489 | hdr->dxferp = io_u->buf; |
| 490 | hdr->dxfer_len = io_u->buflen; |
| 491 | } |
| 492 | } |
| 493 | |
Jens Axboe | b1ff340 | 2006-02-17 11:35:58 +0100 | [diff] [blame] | 494 | static int fio_sgio_getevents(struct thread_data *td, int min, int max, |
| 495 | struct timespec *t) |
Jens Axboe | 0af7b54 | 2006-02-17 10:10:12 +0100 | [diff] [blame] | 496 | { |
Jens Axboe | b1ff340 | 2006-02-17 11:35:58 +0100 | [diff] [blame] | 497 | struct sgio_data *sd = td->io_data; |
| 498 | struct pollfd pfd = { .fd = td->fd, .events = POLLIN }; |
| 499 | void *buf = malloc(max * sizeof(struct sg_io_hdr)); |
Jens Axboe | 5f2b7b5 | 2006-02-17 11:34:47 +0100 | [diff] [blame] | 500 | int left = max, ret, events, i, r = 0, fl = 0; |
Jens Axboe | b1ff340 | 2006-02-17 11:35:58 +0100 | [diff] [blame] | 501 | |
| 502 | /* |
| 503 | * don't block for !events |
| 504 | */ |
| 505 | if (!min) { |
| 506 | fl = fcntl(td->fd, F_GETFL); |
| 507 | fcntl(td->fd, F_SETFL, fl | O_NONBLOCK); |
| 508 | } |
| 509 | |
| 510 | while (left) { |
| 511 | do { |
| 512 | if (!min) |
| 513 | break; |
| 514 | poll(&pfd, 1, -1); |
| 515 | if (pfd.revents & POLLIN) |
| 516 | break; |
| 517 | } while (1); |
| 518 | |
| 519 | ret = read(td->fd, buf, left * sizeof(struct sg_io_hdr)); |
| 520 | if (ret < 0) { |
| 521 | if (errno == EAGAIN) |
| 522 | break; |
| 523 | td_verror(td, errno); |
| 524 | r = -1; |
| 525 | break; |
| 526 | } else if (!ret) |
| 527 | break; |
| 528 | |
| 529 | events = ret / sizeof(struct sg_io_hdr); |
| 530 | left -= events; |
| 531 | r += events; |
| 532 | |
| 533 | for (i = 0; i < events; i++) { |
| 534 | struct sg_io_hdr *hdr = (struct sg_io_hdr *) buf + i; |
| 535 | |
| 536 | sd->events[i] = hdr->usr_ptr; |
| 537 | } |
| 538 | } |
| 539 | |
| 540 | if (!min) |
| 541 | fcntl(td->fd, F_SETFL, fl); |
| 542 | |
| 543 | free(buf); |
| 544 | return r; |
| 545 | } |
| 546 | |
Jens Axboe | f3a4ef5 | 2006-05-25 01:30:48 +0200 | [diff] [blame] | 547 | static int fio_sgio_ioctl_doio(struct thread_data *td, struct io_u *io_u) |
Jens Axboe | b1ff340 | 2006-02-17 11:35:58 +0100 | [diff] [blame] | 548 | { |
| 549 | struct sgio_data *sd = td->io_data; |
| 550 | struct sg_io_hdr *hdr = &io_u->hdr; |
Jens Axboe | 0af7b54 | 2006-02-17 10:10:12 +0100 | [diff] [blame] | 551 | |
Jens Axboe | f3a4ef5 | 2006-05-25 01:30:48 +0200 | [diff] [blame] | 552 | sd->events[0] = io_u; |
| 553 | |
| 554 | return ioctl(td->fd, SG_IO, hdr); |
| 555 | } |
| 556 | |
| 557 | static int fio_sgio_rw_doio(struct thread_data *td, struct io_u *io_u, int sync) |
| 558 | { |
| 559 | struct sg_io_hdr *hdr = &io_u->hdr; |
| 560 | int ret; |
Jens Axboe | 0af7b54 | 2006-02-17 10:10:12 +0100 | [diff] [blame] | 561 | |
| 562 | ret = write(td->fd, hdr, sizeof(*hdr)); |
| 563 | if (ret < 0) |
| 564 | return errno; |
| 565 | |
Jens Axboe | b1ff340 | 2006-02-17 11:35:58 +0100 | [diff] [blame] | 566 | if (sync) { |
| 567 | ret = read(td->fd, hdr, sizeof(*hdr)); |
| 568 | if (ret < 0) |
| 569 | return errno; |
| 570 | } |
Jens Axboe | 0af7b54 | 2006-02-17 10:10:12 +0100 | [diff] [blame] | 571 | |
| 572 | return 0; |
| 573 | } |
| 574 | |
Jens Axboe | f3a4ef5 | 2006-05-25 01:30:48 +0200 | [diff] [blame] | 575 | static int fio_sgio_doio(struct thread_data *td, struct io_u *io_u, int sync) |
| 576 | { |
| 577 | if (td->filetype == FIO_TYPE_BD) |
| 578 | return fio_sgio_ioctl_doio(td, io_u); |
| 579 | |
| 580 | return fio_sgio_rw_doio(td, io_u, sync); |
| 581 | } |
| 582 | |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 583 | static int fio_sgio_sync(struct thread_data *td) |
| 584 | { |
| 585 | struct sgio_data *sd = td->io_data; |
Jens Axboe | b1ff340 | 2006-02-17 11:35:58 +0100 | [diff] [blame] | 586 | struct sg_io_hdr *hdr; |
| 587 | struct io_u *io_u; |
| 588 | int ret; |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 589 | |
Jens Axboe | b1ff340 | 2006-02-17 11:35:58 +0100 | [diff] [blame] | 590 | io_u = __get_io_u(td); |
| 591 | if (!io_u) |
| 592 | return ENOMEM; |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 593 | |
Jens Axboe | b1ff340 | 2006-02-17 11:35:58 +0100 | [diff] [blame] | 594 | hdr = &io_u->hdr; |
| 595 | sgio_hdr_init(sd, hdr, io_u, 0); |
| 596 | hdr->dxfer_direction = SG_DXFER_NONE; |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 597 | |
Jens Axboe | b1ff340 | 2006-02-17 11:35:58 +0100 | [diff] [blame] | 598 | hdr->cmdp[0] = 0x35; |
| 599 | |
| 600 | ret = fio_sgio_doio(td, io_u, 1); |
| 601 | put_io_u(td, io_u); |
| 602 | return ret; |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 603 | } |
| 604 | |
| 605 | static int fio_sgio_prep(struct thread_data *td, struct io_u *io_u) |
| 606 | { |
| 607 | struct sg_io_hdr *hdr = &io_u->hdr; |
| 608 | struct sgio_data *sd = td->io_data; |
| 609 | int nr_blocks, lba; |
| 610 | |
| 611 | if (io_u->buflen & (sd->bs - 1)) { |
| 612 | fprintf(stderr, "read/write not sector aligned\n"); |
| 613 | return EINVAL; |
| 614 | } |
| 615 | |
Jens Axboe | b1ff340 | 2006-02-17 11:35:58 +0100 | [diff] [blame] | 616 | sgio_hdr_init(sd, hdr, io_u, 1); |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 617 | |
| 618 | if (io_u->ddir == DDIR_READ) { |
| 619 | hdr->dxfer_direction = SG_DXFER_FROM_DEV; |
| 620 | hdr->cmdp[0] = 0x28; |
| 621 | } else { |
| 622 | hdr->dxfer_direction = SG_DXFER_TO_DEV; |
| 623 | hdr->cmdp[0] = 0x2a; |
| 624 | } |
| 625 | |
| 626 | nr_blocks = io_u->buflen / sd->bs; |
| 627 | lba = io_u->offset / sd->bs; |
| 628 | hdr->cmdp[2] = (lba >> 24) & 0xff; |
| 629 | hdr->cmdp[3] = (lba >> 16) & 0xff; |
| 630 | hdr->cmdp[4] = (lba >> 8) & 0xff; |
| 631 | hdr->cmdp[5] = lba & 0xff; |
| 632 | hdr->cmdp[7] = (nr_blocks >> 8) & 0xff; |
| 633 | hdr->cmdp[8] = nr_blocks & 0xff; |
| 634 | return 0; |
| 635 | } |
| 636 | |
| 637 | static int fio_sgio_queue(struct thread_data *td, struct io_u *io_u) |
| 638 | { |
| 639 | struct sg_io_hdr *hdr = &io_u->hdr; |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 640 | int ret; |
| 641 | |
Jens Axboe | b1ff340 | 2006-02-17 11:35:58 +0100 | [diff] [blame] | 642 | ret = fio_sgio_doio(td, io_u, 0); |
Jens Axboe | 0af7b54 | 2006-02-17 10:10:12 +0100 | [diff] [blame] | 643 | |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 644 | if (ret < 0) |
| 645 | io_u->error = errno; |
| 646 | else if (hdr->status) { |
| 647 | io_u->resid = hdr->resid; |
| 648 | io_u->error = EIO; |
| 649 | } |
| 650 | |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 651 | return io_u->error; |
| 652 | } |
| 653 | |
| 654 | static struct io_u *fio_sgio_event(struct thread_data *td, int event) |
| 655 | { |
| 656 | struct sgio_data *sd = td->io_data; |
| 657 | |
Jens Axboe | b1ff340 | 2006-02-17 11:35:58 +0100 | [diff] [blame] | 658 | return sd->events[event]; |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 659 | } |
| 660 | |
Jens Axboe | 0af7b54 | 2006-02-17 10:10:12 +0100 | [diff] [blame] | 661 | static int fio_sgio_get_bs(struct thread_data *td, unsigned int *bs) |
| 662 | { |
| 663 | struct sgio_data *sd = td->io_data; |
Jens Axboe | b1ff340 | 2006-02-17 11:35:58 +0100 | [diff] [blame] | 664 | struct io_u *io_u; |
| 665 | struct sg_io_hdr *hdr; |
Jens Axboe | 0af7b54 | 2006-02-17 10:10:12 +0100 | [diff] [blame] | 666 | unsigned char buf[8]; |
| 667 | int ret; |
| 668 | |
Jens Axboe | b1ff340 | 2006-02-17 11:35:58 +0100 | [diff] [blame] | 669 | io_u = __get_io_u(td); |
| 670 | assert(io_u); |
| 671 | |
| 672 | hdr = &io_u->hdr; |
| 673 | sgio_hdr_init(sd, hdr, io_u, 0); |
Jens Axboe | 0af7b54 | 2006-02-17 10:10:12 +0100 | [diff] [blame] | 674 | memset(buf, 0, sizeof(buf)); |
| 675 | |
Jens Axboe | b1ff340 | 2006-02-17 11:35:58 +0100 | [diff] [blame] | 676 | hdr->cmdp[0] = 0x25; |
| 677 | hdr->dxfer_direction = SG_DXFER_FROM_DEV; |
| 678 | hdr->dxferp = buf; |
| 679 | hdr->dxfer_len = sizeof(buf); |
Jens Axboe | 0af7b54 | 2006-02-17 10:10:12 +0100 | [diff] [blame] | 680 | |
Jens Axboe | b1ff340 | 2006-02-17 11:35:58 +0100 | [diff] [blame] | 681 | ret = fio_sgio_doio(td, io_u, 1); |
| 682 | if (ret) { |
| 683 | put_io_u(td, io_u); |
Jens Axboe | 0af7b54 | 2006-02-17 10:10:12 +0100 | [diff] [blame] | 684 | return ret; |
Jens Axboe | b1ff340 | 2006-02-17 11:35:58 +0100 | [diff] [blame] | 685 | } |
Jens Axboe | 0af7b54 | 2006-02-17 10:10:12 +0100 | [diff] [blame] | 686 | |
| 687 | *bs = (buf[4] << 24) | (buf[5] << 16) | (buf[6] << 8) | buf[7]; |
Jens Axboe | b1ff340 | 2006-02-17 11:35:58 +0100 | [diff] [blame] | 688 | put_io_u(td, io_u); |
Jens Axboe | 0af7b54 | 2006-02-17 10:10:12 +0100 | [diff] [blame] | 689 | return 0; |
| 690 | } |
| 691 | |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 692 | int fio_sgio_init(struct thread_data *td) |
| 693 | { |
| 694 | struct sgio_data *sd; |
Jens Axboe | 0af7b54 | 2006-02-17 10:10:12 +0100 | [diff] [blame] | 695 | unsigned int bs; |
| 696 | int ret; |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 697 | |
Jens Axboe | 0af7b54 | 2006-02-17 10:10:12 +0100 | [diff] [blame] | 698 | sd = malloc(sizeof(*sd)); |
Jens Axboe | b1ff340 | 2006-02-17 11:35:58 +0100 | [diff] [blame] | 699 | sd->cmds = malloc(td->iodepth * sizeof(struct sgio_cmd)); |
| 700 | sd->events = malloc(td->iodepth * sizeof(struct io_u *)); |
Jens Axboe | 0af7b54 | 2006-02-17 10:10:12 +0100 | [diff] [blame] | 701 | td->io_data = sd; |
| 702 | |
| 703 | if (td->filetype == FIO_TYPE_BD) { |
| 704 | if (ioctl(td->fd, BLKSSZGET, &bs) < 0) { |
| 705 | td_verror(td, errno); |
| 706 | return 1; |
| 707 | } |
| 708 | } else if (td->filetype == FIO_TYPE_CHAR) { |
| 709 | int version; |
| 710 | |
| 711 | if (ioctl(td->fd, SG_GET_VERSION_NUM, &version) < 0) { |
| 712 | td_verror(td, errno); |
| 713 | return 1; |
| 714 | } |
| 715 | |
| 716 | ret = fio_sgio_get_bs(td, &bs); |
| 717 | if (ret) |
| 718 | return ret; |
| 719 | } else { |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 720 | fprintf(stderr, "ioengine sgio only works on block devices\n"); |
| 721 | return 1; |
| 722 | } |
| 723 | |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 724 | sd->bs = bs; |
| 725 | |
| 726 | td->io_prep = fio_sgio_prep; |
| 727 | td->io_queue = fio_sgio_queue; |
Jens Axboe | b1ff340 | 2006-02-17 11:35:58 +0100 | [diff] [blame] | 728 | |
| 729 | if (td->filetype == FIO_TYPE_BD) |
| 730 | td->io_getevents = fio_syncio_getevents; |
| 731 | else |
| 732 | td->io_getevents = fio_sgio_getevents; |
| 733 | |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 734 | td->io_event = fio_sgio_event; |
| 735 | td->io_cancel = NULL; |
| 736 | td->io_cleanup = fio_syncio_cleanup; |
| 737 | td->io_sync = fio_sgio_sync; |
| 738 | |
| 739 | /* |
| 740 | * we want to do it, regardless of whether odirect is set or not |
| 741 | */ |
| 742 | td->override_sync = 1; |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 743 | return 0; |
| 744 | } |
| 745 | |
| 746 | #else /* FIO_HAVE_SGIO */ |
| 747 | |
| 748 | int fio_sgio_init(struct thread_data *td) |
| 749 | { |
| 750 | return EINVAL; |
| 751 | } |
| 752 | |
| 753 | #endif /* FIO_HAVE_SGIO */ |
Jens Axboe | 8756e4d | 2006-05-27 20:24:53 +0200 | [diff] [blame] | 754 | |
| 755 | #ifdef FIO_HAVE_SPLICE |
| 756 | struct spliceio_data { |
| 757 | struct io_u *last_io_u; |
| 758 | int pipe[2]; |
| 759 | }; |
| 760 | |
| 761 | static struct io_u *fio_spliceio_event(struct thread_data *td, int event) |
| 762 | { |
Jens Axboe | 5185228 | 2006-05-27 20:32:34 +0200 | [diff] [blame] | 763 | struct spliceio_data *sd = td->io_data; |
Jens Axboe | 8756e4d | 2006-05-27 20:24:53 +0200 | [diff] [blame] | 764 | |
| 765 | assert(event == 0); |
| 766 | |
| 767 | return sd->last_io_u; |
| 768 | } |
| 769 | |
| 770 | /* |
| 771 | * For splice reading, we unfortunately cannot (yet) vmsplice the other way. |
| 772 | * So just splice the data from the file into the pipe, and use regular |
| 773 | * read to fill the buffer. Doesn't make a lot of sense, but... |
| 774 | */ |
| 775 | static int fio_splice_read(struct thread_data *td, struct io_u *io_u) |
| 776 | { |
| 777 | struct spliceio_data *sd = td->io_data; |
| 778 | int ret, ret2, buflen; |
Jens Axboe | 3feedc6 | 2006-05-28 20:13:51 +0200 | [diff] [blame] | 779 | off_t offset; |
Jens Axboe | 8756e4d | 2006-05-27 20:24:53 +0200 | [diff] [blame] | 780 | void *p; |
| 781 | |
Jens Axboe | 3feedc6 | 2006-05-28 20:13:51 +0200 | [diff] [blame] | 782 | offset = io_u->offset; |
Jens Axboe | 8756e4d | 2006-05-27 20:24:53 +0200 | [diff] [blame] | 783 | buflen = io_u->buflen; |
| 784 | p = io_u->buf; |
Jens Axboe | 5185228 | 2006-05-27 20:32:34 +0200 | [diff] [blame] | 785 | while (buflen) { |
Jens Axboe | 3feedc6 | 2006-05-28 20:13:51 +0200 | [diff] [blame] | 786 | int this_len = buflen; |
Jens Axboe | 8756e4d | 2006-05-27 20:24:53 +0200 | [diff] [blame] | 787 | |
Jens Axboe | 3feedc6 | 2006-05-28 20:13:51 +0200 | [diff] [blame] | 788 | if (this_len > SPLICE_DEF_SIZE) |
| 789 | this_len = SPLICE_DEF_SIZE; |
| 790 | |
| 791 | ret = splice(td->fd, &offset, sd->pipe[1], NULL, this_len, SPLICE_F_MORE); |
| 792 | if (ret < 0) { |
| 793 | if (errno == ENODATA || errno == EAGAIN) |
| 794 | continue; |
| 795 | |
Jens Axboe | 8756e4d | 2006-05-27 20:24:53 +0200 | [diff] [blame] | 796 | return errno; |
Jens Axboe | 3feedc6 | 2006-05-28 20:13:51 +0200 | [diff] [blame] | 797 | } |
Jens Axboe | 8756e4d | 2006-05-27 20:24:53 +0200 | [diff] [blame] | 798 | |
| 799 | buflen -= ret; |
| 800 | |
| 801 | while (ret) { |
| 802 | ret2 = read(sd->pipe[0], p, ret); |
| 803 | if (ret2 < 0) |
| 804 | return errno; |
| 805 | |
| 806 | ret -= ret2; |
| 807 | p += ret2; |
| 808 | } |
Jens Axboe | 5185228 | 2006-05-27 20:32:34 +0200 | [diff] [blame] | 809 | } |
Jens Axboe | 8756e4d | 2006-05-27 20:24:53 +0200 | [diff] [blame] | 810 | |
| 811 | return io_u->buflen; |
| 812 | } |
| 813 | |
| 814 | /* |
| 815 | * For splice writing, we can vmsplice our data buffer directly into a |
| 816 | * pipe and then splice that to a file. |
| 817 | */ |
| 818 | static int fio_splice_write(struct thread_data *td, struct io_u *io_u) |
| 819 | { |
| 820 | struct spliceio_data *sd = td->io_data; |
| 821 | struct iovec iov[1] = { |
| 822 | { |
| 823 | .iov_base = io_u->buf, |
| 824 | .iov_len = io_u->buflen, |
| 825 | } |
| 826 | }; |
| 827 | struct pollfd pfd = { .fd = sd->pipe[1], .events = POLLOUT, }; |
Jens Axboe | 3feedc6 | 2006-05-28 20:13:51 +0200 | [diff] [blame] | 828 | off_t off = io_u->offset; |
Jens Axboe | 8756e4d | 2006-05-27 20:24:53 +0200 | [diff] [blame] | 829 | int ret, ret2; |
| 830 | |
| 831 | while (iov[0].iov_len) { |
| 832 | if (poll(&pfd, 1, -1) < 0) |
| 833 | return errno; |
| 834 | |
| 835 | ret = vmsplice(sd->pipe[1], iov, 1, SPLICE_F_NONBLOCK); |
| 836 | if (ret < 0) |
| 837 | return errno; |
| 838 | |
| 839 | iov[0].iov_len -= ret; |
| 840 | iov[0].iov_base += ret; |
| 841 | |
| 842 | while (ret) { |
Jens Axboe | 8756e4d | 2006-05-27 20:24:53 +0200 | [diff] [blame] | 843 | ret2 = splice(sd->pipe[0], NULL, td->fd, &off, ret, 0); |
| 844 | if (ret2 < 0) |
| 845 | return errno; |
| 846 | |
| 847 | ret -= ret2; |
| 848 | } |
| 849 | } |
| 850 | |
| 851 | return io_u->buflen; |
| 852 | } |
| 853 | |
| 854 | static int fio_spliceio_queue(struct thread_data *td, struct io_u *io_u) |
| 855 | { |
| 856 | struct spliceio_data *sd = td->io_data; |
| 857 | int ret; |
| 858 | |
| 859 | if (io_u->ddir == DDIR_READ) |
| 860 | ret = fio_splice_read(td, io_u); |
| 861 | else |
| 862 | ret = fio_splice_write(td, io_u); |
| 863 | |
| 864 | if ((unsigned int) ret != io_u->buflen) { |
| 865 | if (ret > 0) { |
| 866 | io_u->resid = io_u->buflen - ret; |
| 867 | io_u->error = ENODATA; |
| 868 | } else |
| 869 | io_u->error = errno; |
| 870 | } |
| 871 | |
| 872 | if (!io_u->error) |
| 873 | sd->last_io_u = io_u; |
| 874 | |
| 875 | return io_u->error; |
| 876 | } |
| 877 | |
| 878 | static void fio_spliceio_cleanup(struct thread_data *td) |
| 879 | { |
| 880 | struct spliceio_data *sd = td->io_data; |
| 881 | |
| 882 | if (sd) { |
| 883 | close(sd->pipe[0]); |
| 884 | close(sd->pipe[1]); |
| 885 | free(sd); |
| 886 | td->io_data = NULL; |
| 887 | } |
| 888 | } |
| 889 | |
| 890 | int fio_spliceio_init(struct thread_data *td) |
| 891 | { |
| 892 | struct spliceio_data *sd = malloc(sizeof(*sd)); |
| 893 | |
| 894 | td->io_queue = fio_spliceio_queue; |
| 895 | td->io_getevents = fio_syncio_getevents; |
| 896 | td->io_event = fio_spliceio_event; |
| 897 | td->io_cancel = NULL; |
| 898 | td->io_cleanup = fio_spliceio_cleanup; |
| 899 | td->io_sync = fio_io_sync; |
| 900 | |
| 901 | sd->last_io_u = NULL; |
| 902 | if (pipe(sd->pipe) < 0) { |
| 903 | td_verror(td, errno); |
| 904 | free(sd); |
| 905 | return 1; |
| 906 | } |
| 907 | |
| 908 | td->io_data = sd; |
| 909 | return 0; |
| 910 | } |
| 911 | |
| 912 | #else /* FIO_HAVE_SPLICE */ |
| 913 | |
| 914 | int fio_spliceio_init(struct thread_data *td) |
| 915 | { |
| 916 | return EINVAL; |
| 917 | } |
| 918 | |
| 919 | #endif /* FIO_HAVE_SPLICE */ |