| 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 <stdlib.h> |
| 13 | #include <unistd.h> |
| 14 | #include <string.h> |
| 15 | #include <dlfcn.h> |
| 16 | #include <fcntl.h> |
| 17 | #include <assert.h> |
| 18 | #include <sys/types.h> |
| 19 | #include <dirent.h> |
| 20 | |
| 21 | #include "fio.h" |
| 22 | #include "diskutil.h" |
| 23 | #include "zbd.h" |
| 24 | |
| 25 | static FLIST_HEAD(engine_list); |
| 26 | |
| 27 | static bool check_engine_ops(struct thread_data *td, struct ioengine_ops *ops) |
| 28 | { |
| 29 | if (ops->version != FIO_IOOPS_VERSION) { |
| 30 | log_err("bad ioops version %d (want %d)\n", ops->version, |
| 31 | FIO_IOOPS_VERSION); |
| 32 | return true; |
| 33 | } |
| 34 | |
| 35 | if (!ops->queue) { |
| 36 | log_err("%s: no queue handler\n", ops->name); |
| 37 | return true; |
| 38 | } |
| 39 | |
| 40 | /* |
| 41 | * sync engines only need a ->queue() |
| 42 | */ |
| 43 | if (ops->flags & FIO_SYNCIO) |
| 44 | return false; |
| 45 | |
| 46 | /* |
| 47 | * async engines aren't reliable with offload |
| 48 | */ |
| 49 | if ((td->o.io_submit_mode == IO_MODE_OFFLOAD) && |
| 50 | (ops->flags & FIO_NO_OFFLOAD)) { |
| 51 | log_err("%s: can't be used with offloaded submit. Use a sync " |
| 52 | "engine\n", ops->name); |
| 53 | return true; |
| 54 | } |
| 55 | |
| 56 | if (!ops->event || !ops->getevents) { |
| 57 | log_err("%s: no event/getevents handler\n", ops->name); |
| 58 | return true; |
| 59 | } |
| 60 | |
| 61 | return false; |
| 62 | } |
| 63 | |
| 64 | void unregister_ioengine(struct ioengine_ops *ops) |
| 65 | { |
| 66 | dprint(FD_IO, "ioengine %s unregistered\n", ops->name); |
| 67 | flist_del_init(&ops->list); |
| 68 | } |
| 69 | |
| 70 | void register_ioengine(struct ioengine_ops *ops) |
| 71 | { |
| 72 | dprint(FD_IO, "ioengine %s registered\n", ops->name); |
| 73 | flist_add_tail(&ops->list, &engine_list); |
| 74 | } |
| 75 | |
| 76 | static struct ioengine_ops *find_ioengine(const char *name) |
| 77 | { |
| 78 | struct ioengine_ops *ops; |
| 79 | struct flist_head *entry; |
| 80 | |
| 81 | flist_for_each(entry, &engine_list) { |
| 82 | ops = flist_entry(entry, struct ioengine_ops, list); |
| 83 | if (!strcmp(name, ops->name)) |
| 84 | return ops; |
| 85 | } |
| 86 | |
| 87 | return NULL; |
| 88 | } |
| 89 | |
| 90 | #ifdef CONFIG_DYNAMIC_ENGINES |
| 91 | static void *dlopen_external(struct thread_data *td, const char *engine) |
| 92 | { |
| 93 | char engine_path[PATH_MAX]; |
| 94 | void *dlhandle; |
| 95 | |
| 96 | sprintf(engine_path, "%s/fio-%s.so", FIO_EXT_ENG_DIR, engine); |
| 97 | |
| 98 | dprint(FD_IO, "dlopen external %s\n", engine_path); |
| 99 | dlhandle = dlopen(engine_path, RTLD_LAZY); |
| 100 | if (!dlhandle) |
| 101 | log_info("Engine %s not found; Either name is invalid, was not built, or fio-engine-%s package is missing.\n", |
| 102 | engine, engine); |
| 103 | |
| 104 | return dlhandle; |
| 105 | } |
| 106 | #else |
| 107 | #define dlopen_external(td, engine) (NULL) |
| 108 | #endif |
| 109 | |
| 110 | static struct ioengine_ops *dlopen_ioengine(struct thread_data *td, |
| 111 | const char *engine_lib) |
| 112 | { |
| 113 | struct ioengine_ops *ops; |
| 114 | void *dlhandle; |
| 115 | |
| 116 | if (!strncmp(engine_lib, "linuxaio", 8) || |
| 117 | !strncmp(engine_lib, "aio", 3)) |
| 118 | engine_lib = "libaio"; |
| 119 | |
| 120 | dprint(FD_IO, "dlopen engine %s\n", engine_lib); |
| 121 | |
| 122 | dlerror(); |
| 123 | dlhandle = dlopen(engine_lib, RTLD_LAZY); |
| 124 | if (!dlhandle) { |
| 125 | dlhandle = dlopen_external(td, engine_lib); |
| 126 | if (!dlhandle) { |
| 127 | td_vmsg(td, -1, dlerror(), "dlopen"); |
| 128 | return NULL; |
| 129 | } |
| 130 | } |
| 131 | |
| 132 | /* |
| 133 | * Unlike the included modules, external engines should have a |
| 134 | * non-static ioengine structure that we can reference. |
| 135 | */ |
| 136 | ops = dlsym(dlhandle, engine_lib); |
| 137 | if (!ops) |
| 138 | ops = dlsym(dlhandle, "ioengine"); |
| 139 | |
| 140 | /* |
| 141 | * For some external engines (like C++ ones) it is not that trivial |
| 142 | * to provide a non-static ionengine structure that we can reference. |
| 143 | * Instead we call a method which allocates the required ioengine |
| 144 | * structure. |
| 145 | */ |
| 146 | if (!ops) { |
| 147 | get_ioengine_t get_ioengine = dlsym(dlhandle, "get_ioengine"); |
| 148 | |
| 149 | if (get_ioengine) |
| 150 | get_ioengine(&ops); |
| 151 | } |
| 152 | |
| 153 | if (!ops) { |
| 154 | td_vmsg(td, -1, dlerror(), "dlsym"); |
| 155 | dlclose(dlhandle); |
| 156 | return NULL; |
| 157 | } |
| 158 | |
| 159 | ops->dlhandle = dlhandle; |
| 160 | return ops; |
| 161 | } |
| 162 | |
| 163 | static struct ioengine_ops *__load_ioengine(const char *engine) |
| 164 | { |
| 165 | /* |
| 166 | * linux libaio has alias names, so convert to what we want |
| 167 | */ |
| 168 | if (!strncmp(engine, "linuxaio", 8) || !strncmp(engine, "aio", 3)) { |
| 169 | dprint(FD_IO, "converting ioengine name: %s -> libaio\n", |
| 170 | engine); |
| 171 | engine = "libaio"; |
| 172 | } |
| 173 | |
| 174 | dprint(FD_IO, "load ioengine %s\n", engine); |
| 175 | return find_ioengine(engine); |
| 176 | } |
| 177 | |
| 178 | struct ioengine_ops *load_ioengine(struct thread_data *td) |
| 179 | { |
| 180 | struct ioengine_ops *ops = NULL; |
| 181 | const char *name; |
| 182 | |
| 183 | /* |
| 184 | * Use ->ioengine_so_path if an external ioengine path is specified. |
| 185 | * In this case, ->ioengine is "external" which also means the prefix |
| 186 | * for external ioengines "external:" is properly used. |
| 187 | */ |
| 188 | name = td->o.ioengine_so_path ?: td->o.ioengine; |
| 189 | |
| 190 | /* |
| 191 | * Try to load ->ioengine first, and if failed try to dlopen(3) either |
| 192 | * ->ioengine or ->ioengine_so_path. This is redundant for an external |
| 193 | * ioengine with prefix, and also leaves the possibility of unexpected |
| 194 | * behavior (e.g. if the "external" ioengine exists), but we do this |
| 195 | * so as not to break job files not using the prefix. |
| 196 | */ |
| 197 | ops = __load_ioengine(td->o.ioengine); |
| 198 | |
| 199 | /* We do re-dlopen existing handles, for reference counting */ |
| 200 | if (!ops || ops->dlhandle) |
| 201 | ops = dlopen_ioengine(td, name); |
| 202 | |
| 203 | /* |
| 204 | * If ops is NULL, we failed to load ->ioengine, and also failed to |
| 205 | * dlopen(3) either ->ioengine or ->ioengine_so_path as a path. |
| 206 | */ |
| 207 | if (!ops) { |
| 208 | log_err("fio: engine %s not loadable\n", name); |
| 209 | return NULL; |
| 210 | } |
| 211 | |
| 212 | /* |
| 213 | * Check that the required methods are there. |
| 214 | */ |
| 215 | if (check_engine_ops(td, ops)) |
| 216 | return NULL; |
| 217 | |
| 218 | return ops; |
| 219 | } |
| 220 | |
| 221 | /* |
| 222 | * For cleaning up an ioengine which never made it to init(). |
| 223 | */ |
| 224 | void free_ioengine(struct thread_data *td) |
| 225 | { |
| 226 | dprint(FD_IO, "free ioengine %s\n", td->io_ops->name); |
| 227 | |
| 228 | if (td->eo && td->io_ops->options) { |
| 229 | options_free(td->io_ops->options, td->eo); |
| 230 | free(td->eo); |
| 231 | td->eo = NULL; |
| 232 | } |
| 233 | |
| 234 | if (td->io_ops->dlhandle) { |
| 235 | dprint(FD_IO, "dlclose ioengine %s\n", td->io_ops->name); |
| 236 | dlclose(td->io_ops->dlhandle); |
| 237 | } |
| 238 | |
| 239 | td->io_ops = NULL; |
| 240 | } |
| 241 | |
| 242 | void close_ioengine(struct thread_data *td) |
| 243 | { |
| 244 | dprint(FD_IO, "close ioengine %s\n", td->io_ops->name); |
| 245 | |
| 246 | if (td->io_ops->cleanup) { |
| 247 | td->io_ops->cleanup(td); |
| 248 | td->io_ops_data = NULL; |
| 249 | } |
| 250 | |
| 251 | free_ioengine(td); |
| 252 | } |
| 253 | |
| 254 | int td_io_prep(struct thread_data *td, struct io_u *io_u) |
| 255 | { |
| 256 | dprint_io_u(io_u, "prep"); |
| 257 | fio_ro_check(td, io_u); |
| 258 | |
| 259 | lock_file(td, io_u->file, io_u->ddir); |
| 260 | |
| 261 | if (td->io_ops->prep) { |
| 262 | int ret = td->io_ops->prep(td, io_u); |
| 263 | |
| 264 | dprint(FD_IO, "prep: io_u %p: ret=%d\n", io_u, ret); |
| 265 | |
| 266 | if (ret) |
| 267 | unlock_file(td, io_u->file); |
| 268 | return ret; |
| 269 | } |
| 270 | |
| 271 | return 0; |
| 272 | } |
| 273 | |
| 274 | int td_io_getevents(struct thread_data *td, unsigned int min, unsigned int max, |
| 275 | const struct timespec *t) |
| 276 | { |
| 277 | int r = 0; |
| 278 | |
| 279 | /* |
| 280 | * For ioengine=rdma one side operation RDMA_WRITE or RDMA_READ, |
| 281 | * server side gets a message from the client |
| 282 | * side that the task is finished, and |
| 283 | * td->done is set to 1 after td_io_commit(). In this case, |
| 284 | * there is no need to reap complete event in server side. |
| 285 | */ |
| 286 | if (td->done) |
| 287 | return 0; |
| 288 | |
| 289 | if (min > 0 && td->io_ops->commit) { |
| 290 | r = td->io_ops->commit(td); |
| 291 | if (r < 0) |
| 292 | goto out; |
| 293 | } |
| 294 | if (max > td->cur_depth) |
| 295 | max = td->cur_depth; |
| 296 | if (min > max) |
| 297 | max = min; |
| 298 | |
| 299 | r = 0; |
| 300 | if (max && td->io_ops->getevents) |
| 301 | r = td->io_ops->getevents(td, min, max, t); |
| 302 | out: |
| 303 | if (r >= 0) { |
| 304 | /* |
| 305 | * Reflect that our submitted requests were retrieved with |
| 306 | * whatever OS async calls are in the underlying engine. |
| 307 | */ |
| 308 | td->io_u_in_flight -= r; |
| 309 | io_u_mark_complete(td, r); |
| 310 | } else |
| 311 | td_verror(td, r, "get_events"); |
| 312 | |
| 313 | dprint(FD_IO, "getevents: %d\n", r); |
| 314 | return r; |
| 315 | } |
| 316 | |
| 317 | enum fio_q_status td_io_queue(struct thread_data *td, struct io_u *io_u) |
| 318 | { |
| 319 | const enum fio_ddir ddir = acct_ddir(io_u); |
| 320 | unsigned long long buflen = io_u->xfer_buflen; |
| 321 | enum fio_q_status ret; |
| 322 | |
| 323 | dprint_io_u(io_u, "queue"); |
| 324 | fio_ro_check(td, io_u); |
| 325 | |
| 326 | assert((io_u->flags & IO_U_F_FLIGHT) == 0); |
| 327 | io_u_set(td, io_u, IO_U_F_FLIGHT); |
| 328 | |
| 329 | /* |
| 330 | * If overlap checking was enabled in offload mode we |
| 331 | * can release this lock that was acquired when we |
| 332 | * started the overlap check because the IO_U_F_FLIGHT |
| 333 | * flag is now set |
| 334 | */ |
| 335 | if (td_offload_overlap(td)) { |
| 336 | int res = pthread_mutex_unlock(&overlap_check); |
| 337 | assert(res == 0); |
| 338 | } |
| 339 | |
| 340 | assert(fio_file_open(io_u->file)); |
| 341 | |
| 342 | /* |
| 343 | * If using a write iolog, store this entry. |
| 344 | */ |
| 345 | log_io_u(td, io_u); |
| 346 | |
| 347 | io_u->error = 0; |
| 348 | io_u->resid = 0; |
| 349 | |
| 350 | if (td_ioengine_flagged(td, FIO_SYNCIO) || |
| 351 | (td_ioengine_flagged(td, FIO_ASYNCIO_SYNC_TRIM) && |
| 352 | io_u->ddir == DDIR_TRIM)) { |
| 353 | if (fio_fill_issue_time(td)) |
| 354 | fio_gettime(&io_u->issue_time, NULL); |
| 355 | |
| 356 | /* |
| 357 | * only used for iolog |
| 358 | */ |
| 359 | if (td->o.read_iolog_file) |
| 360 | memcpy(&td->last_issue, &io_u->issue_time, |
| 361 | sizeof(io_u->issue_time)); |
| 362 | } |
| 363 | |
| 364 | |
| 365 | if (ddir_rw(ddir)) { |
| 366 | if (!(io_u->flags & IO_U_F_VER_LIST)) { |
| 367 | td->io_issues[ddir]++; |
| 368 | td->io_issue_bytes[ddir] += buflen; |
| 369 | } |
| 370 | td->rate_io_issue_bytes[ddir] += buflen; |
| 371 | } |
| 372 | |
| 373 | ret = td->io_ops->queue(td, io_u); |
| 374 | zbd_queue_io_u(td, io_u, ret); |
| 375 | |
| 376 | unlock_file(td, io_u->file); |
| 377 | |
| 378 | if (ret == FIO_Q_BUSY && ddir_rw(ddir)) { |
| 379 | td->io_issues[ddir]--; |
| 380 | td->io_issue_bytes[ddir] -= buflen; |
| 381 | td->rate_io_issue_bytes[ddir] -= buflen; |
| 382 | io_u_clear(td, io_u, IO_U_F_FLIGHT); |
| 383 | } |
| 384 | |
| 385 | /* |
| 386 | * If an error was seen and the io engine didn't propagate it |
| 387 | * back to 'td', do so. |
| 388 | */ |
| 389 | if (io_u->error && !td->error) |
| 390 | td_verror(td, io_u->error, "td_io_queue"); |
| 391 | |
| 392 | /* |
| 393 | * Add warning for O_DIRECT so that users have an easier time |
| 394 | * spotting potentially bad alignment. If this triggers for the first |
| 395 | * IO, then it's likely an alignment problem or because the host fs |
| 396 | * does not support O_DIRECT |
| 397 | */ |
| 398 | if (io_u->error == EINVAL && td->io_issues[io_u->ddir & 1] == 1 && |
| 399 | td->o.odirect) { |
| 400 | |
| 401 | log_info("fio: first direct IO errored. File system may not " |
| 402 | "support direct IO, or iomem_align= is bad, or " |
| 403 | "invalid block size. Try setting direct=0.\n"); |
| 404 | } |
| 405 | |
| 406 | if (zbd_unaligned_write(io_u->error) && |
| 407 | td->io_issues[io_u->ddir & 1] == 1 && |
| 408 | td->o.zone_mode != ZONE_MODE_ZBD) { |
| 409 | log_info("fio: first I/O failed. If %s is a zoned block device, consider --zonemode=zbd\n", |
| 410 | io_u->file->file_name); |
| 411 | } |
| 412 | |
| 413 | if (!td->io_ops->commit) { |
| 414 | io_u_mark_submit(td, 1); |
| 415 | io_u_mark_complete(td, 1); |
| 416 | } |
| 417 | |
| 418 | if (ret == FIO_Q_COMPLETED) { |
| 419 | if (ddir_rw(io_u->ddir) || |
| 420 | (ddir_sync(io_u->ddir) && td->runstate != TD_FSYNCING)) { |
| 421 | io_u_mark_depth(td, 1); |
| 422 | td->ts.total_io_u[io_u->ddir]++; |
| 423 | } |
| 424 | } else if (ret == FIO_Q_QUEUED) { |
| 425 | td->io_u_queued++; |
| 426 | |
| 427 | if (ddir_rw(io_u->ddir) || |
| 428 | (ddir_sync(io_u->ddir) && td->runstate != TD_FSYNCING)) |
| 429 | td->ts.total_io_u[io_u->ddir]++; |
| 430 | |
| 431 | if (td->io_u_queued >= td->o.iodepth_batch) |
| 432 | td_io_commit(td); |
| 433 | } |
| 434 | |
| 435 | if (!td_ioengine_flagged(td, FIO_SYNCIO) && |
| 436 | (!td_ioengine_flagged(td, FIO_ASYNCIO_SYNC_TRIM) || |
| 437 | io_u->ddir != DDIR_TRIM)) { |
| 438 | if (fio_fill_issue_time(td)) |
| 439 | fio_gettime(&io_u->issue_time, NULL); |
| 440 | |
| 441 | /* |
| 442 | * only used for iolog |
| 443 | */ |
| 444 | if (td->o.read_iolog_file) |
| 445 | memcpy(&td->last_issue, &io_u->issue_time, |
| 446 | sizeof(io_u->issue_time)); |
| 447 | } |
| 448 | |
| 449 | return ret; |
| 450 | } |
| 451 | |
| 452 | int td_io_init(struct thread_data *td) |
| 453 | { |
| 454 | int ret = 0; |
| 455 | |
| 456 | if (td->io_ops->init) { |
| 457 | ret = td->io_ops->init(td); |
| 458 | if (ret) |
| 459 | log_err("fio: io engine %s init failed.%s\n", |
| 460 | td->io_ops->name, |
| 461 | td->o.iodepth > 1 ? |
| 462 | " Perhaps try reducing io depth?" : ""); |
| 463 | else |
| 464 | td->io_ops_init = 1; |
| 465 | if (!td->error) |
| 466 | td->error = ret; |
| 467 | } |
| 468 | |
| 469 | return ret; |
| 470 | } |
| 471 | |
| 472 | void td_io_commit(struct thread_data *td) |
| 473 | { |
| 474 | int ret; |
| 475 | |
| 476 | dprint(FD_IO, "calling ->commit(), depth %d\n", td->cur_depth); |
| 477 | |
| 478 | if (!td->cur_depth || !td->io_u_queued) |
| 479 | return; |
| 480 | |
| 481 | io_u_mark_depth(td, td->io_u_queued); |
| 482 | |
| 483 | if (td->io_ops->commit) { |
| 484 | ret = td->io_ops->commit(td); |
| 485 | if (ret) |
| 486 | td_verror(td, -ret, "io commit"); |
| 487 | } |
| 488 | |
| 489 | /* |
| 490 | * Reflect that events were submitted as async IO requests. |
| 491 | */ |
| 492 | td->io_u_in_flight += td->io_u_queued; |
| 493 | td->io_u_queued = 0; |
| 494 | } |
| 495 | |
| 496 | int td_io_open_file(struct thread_data *td, struct fio_file *f) |
| 497 | { |
| 498 | if (fio_file_closing(f)) { |
| 499 | /* |
| 500 | * Open translates to undo closing. |
| 501 | */ |
| 502 | fio_file_clear_closing(f); |
| 503 | get_file(f); |
| 504 | return 0; |
| 505 | } |
| 506 | assert(!fio_file_open(f)); |
| 507 | assert(f->fd == -1); |
| 508 | assert(td->io_ops->open_file); |
| 509 | |
| 510 | if (td->io_ops->open_file(td, f)) { |
| 511 | if (td->error == EINVAL && td->o.odirect) |
| 512 | log_err("fio: destination does not support O_DIRECT\n"); |
| 513 | if (td->error == EMFILE) { |
| 514 | log_err("fio: try reducing/setting openfiles (failed" |
| 515 | " at %u of %u)\n", td->nr_open_files, |
| 516 | td->o.nr_files); |
| 517 | } |
| 518 | |
| 519 | assert(f->fd == -1); |
| 520 | assert(!fio_file_open(f)); |
| 521 | return 1; |
| 522 | } |
| 523 | |
| 524 | fio_file_reset(td, f); |
| 525 | fio_file_set_open(f); |
| 526 | fio_file_clear_closing(f); |
| 527 | disk_util_inc(f->du); |
| 528 | |
| 529 | td->nr_open_files++; |
| 530 | get_file(f); |
| 531 | |
| 532 | if (f->filetype == FIO_TYPE_PIPE) { |
| 533 | if (td_random(td)) { |
| 534 | log_err("fio: can't seek on pipes (no random io)\n"); |
| 535 | goto err; |
| 536 | } |
| 537 | } |
| 538 | |
| 539 | if (td_ioengine_flagged(td, FIO_DISKLESSIO)) |
| 540 | goto done; |
| 541 | |
| 542 | if (td->o.invalidate_cache && file_invalidate_cache(td, f)) |
| 543 | goto err; |
| 544 | |
| 545 | if (td->o.fadvise_hint != F_ADV_NONE && |
| 546 | (f->filetype == FIO_TYPE_BLOCK || f->filetype == FIO_TYPE_FILE)) { |
| 547 | int flags; |
| 548 | |
| 549 | if (td->o.fadvise_hint == F_ADV_TYPE) { |
| 550 | if (td_random(td)) |
| 551 | flags = POSIX_FADV_RANDOM; |
| 552 | else |
| 553 | flags = POSIX_FADV_SEQUENTIAL; |
| 554 | } else if (td->o.fadvise_hint == F_ADV_RANDOM) |
| 555 | flags = POSIX_FADV_RANDOM; |
| 556 | else if (td->o.fadvise_hint == F_ADV_SEQUENTIAL) |
| 557 | flags = POSIX_FADV_SEQUENTIAL; |
| 558 | else { |
| 559 | log_err("fio: unknown fadvise type %d\n", |
| 560 | td->o.fadvise_hint); |
| 561 | flags = POSIX_FADV_NORMAL; |
| 562 | } |
| 563 | |
| 564 | if (posix_fadvise(f->fd, f->file_offset, f->io_size, flags) < 0) { |
| 565 | if (!fio_did_warn(FIO_WARN_FADVISE)) |
| 566 | log_err("fio: fadvise hint failed\n"); |
| 567 | } |
| 568 | } |
| 569 | #ifdef FIO_HAVE_WRITE_HINT |
| 570 | if (fio_option_is_set(&td->o, write_hint) && |
| 571 | (f->filetype == FIO_TYPE_BLOCK || f->filetype == FIO_TYPE_FILE)) { |
| 572 | uint64_t hint = td->o.write_hint; |
| 573 | int cmd; |
| 574 | |
| 575 | /* |
| 576 | * For direct IO, we just need/want to set the hint on |
| 577 | * the file descriptor. For buffered IO, we need to set |
| 578 | * it on the inode. |
| 579 | */ |
| 580 | if (td->o.odirect) |
| 581 | cmd = F_SET_FILE_RW_HINT; |
| 582 | else |
| 583 | cmd = F_SET_RW_HINT; |
| 584 | |
| 585 | if (fcntl(f->fd, cmd, &hint) < 0) { |
| 586 | td_verror(td, errno, "fcntl write hint"); |
| 587 | goto err; |
| 588 | } |
| 589 | } |
| 590 | #endif |
| 591 | |
| 592 | if (td->o.odirect && !OS_O_DIRECT && fio_set_directio(td, f)) |
| 593 | goto err; |
| 594 | |
| 595 | done: |
| 596 | log_file(td, f, FIO_LOG_OPEN_FILE); |
| 597 | return 0; |
| 598 | err: |
| 599 | disk_util_dec(f->du); |
| 600 | if (td->io_ops->close_file) |
| 601 | td->io_ops->close_file(td, f); |
| 602 | return 1; |
| 603 | } |
| 604 | |
| 605 | int td_io_close_file(struct thread_data *td, struct fio_file *f) |
| 606 | { |
| 607 | if (!fio_file_closing(f)) |
| 608 | log_file(td, f, FIO_LOG_CLOSE_FILE); |
| 609 | |
| 610 | /* |
| 611 | * mark as closing, do real close when last io on it has completed |
| 612 | */ |
| 613 | fio_file_set_closing(f); |
| 614 | |
| 615 | return put_file(td, f); |
| 616 | } |
| 617 | |
| 618 | int td_io_unlink_file(struct thread_data *td, struct fio_file *f) |
| 619 | { |
| 620 | if (td->io_ops->unlink_file) |
| 621 | return td->io_ops->unlink_file(td, f); |
| 622 | else { |
| 623 | int ret; |
| 624 | |
| 625 | ret = unlink(f->file_name); |
| 626 | if (ret < 0) |
| 627 | return errno; |
| 628 | |
| 629 | return 0; |
| 630 | } |
| 631 | } |
| 632 | |
| 633 | int td_io_get_file_size(struct thread_data *td, struct fio_file *f) |
| 634 | { |
| 635 | if (!td->io_ops->get_file_size) |
| 636 | return 0; |
| 637 | |
| 638 | return td->io_ops->get_file_size(td, f); |
| 639 | } |
| 640 | |
| 641 | #ifdef CONFIG_DYNAMIC_ENGINES |
| 642 | /* Load all dynamic engines in FIO_EXT_ENG_DIR for enghelp command */ |
| 643 | static void |
| 644 | fio_load_dynamic_engines(struct thread_data *td) |
| 645 | { |
| 646 | DIR *dirhandle = NULL; |
| 647 | struct dirent *dirent = NULL; |
| 648 | char engine_path[PATH_MAX]; |
| 649 | |
| 650 | dirhandle = opendir(FIO_EXT_ENG_DIR); |
| 651 | if (!dirhandle) |
| 652 | return; |
| 653 | |
| 654 | while ((dirent = readdir(dirhandle)) != NULL) { |
| 655 | if (!strcmp(dirent->d_name, ".") || |
| 656 | !strcmp(dirent->d_name, "..")) |
| 657 | continue; |
| 658 | |
| 659 | sprintf(engine_path, "%s/%s", FIO_EXT_ENG_DIR, dirent->d_name); |
| 660 | dlopen_ioengine(td, engine_path); |
| 661 | } |
| 662 | |
| 663 | closedir(dirhandle); |
| 664 | } |
| 665 | #else |
| 666 | #define fio_load_dynamic_engines(td) do { } while (0) |
| 667 | #endif |
| 668 | |
| 669 | int fio_show_ioengine_help(const char *engine) |
| 670 | { |
| 671 | struct flist_head *entry; |
| 672 | struct thread_data td; |
| 673 | struct ioengine_ops *io_ops; |
| 674 | char *sep; |
| 675 | int ret = 1; |
| 676 | |
| 677 | memset(&td, 0, sizeof(struct thread_data)); |
| 678 | |
| 679 | if (!engine || !*engine) { |
| 680 | log_info("Available IO engines:\n"); |
| 681 | fio_load_dynamic_engines(&td); |
| 682 | flist_for_each(entry, &engine_list) { |
| 683 | io_ops = flist_entry(entry, struct ioengine_ops, list); |
| 684 | log_info("\t%s\n", io_ops->name); |
| 685 | } |
| 686 | return 0; |
| 687 | } |
| 688 | sep = strchr(engine, ','); |
| 689 | if (sep) { |
| 690 | *sep = 0; |
| 691 | sep++; |
| 692 | } |
| 693 | |
| 694 | td.o.ioengine = (char *)engine; |
| 695 | td.io_ops = load_ioengine(&td); |
| 696 | |
| 697 | if (!td.io_ops) { |
| 698 | log_info("IO engine %s not found\n", engine); |
| 699 | return 1; |
| 700 | } |
| 701 | |
| 702 | if (td.io_ops->options) |
| 703 | ret = show_cmd_help(td.io_ops->options, sep); |
| 704 | else |
| 705 | log_info("IO engine %s has no options\n", td.io_ops->name); |
| 706 | |
| 707 | free_ioengine(&td); |
| 708 | return ret; |
| 709 | } |