| 1 | #include <unistd.h> |
| 2 | #include <fcntl.h> |
| 3 | #include <string.h> |
| 4 | #include <assert.h> |
| 5 | #include <dirent.h> |
| 6 | #include <sys/stat.h> |
| 7 | #include <sys/mman.h> |
| 8 | #include <sys/types.h> |
| 9 | |
| 10 | #include "fio.h" |
| 11 | #include "os.h" |
| 12 | |
| 13 | /* |
| 14 | * Check if the file exists and it's large enough. |
| 15 | */ |
| 16 | static int file_ok(struct thread_data *td, struct fio_file *f) |
| 17 | { |
| 18 | struct stat st; |
| 19 | |
| 20 | if (f->filetype != FIO_TYPE_FILE || |
| 21 | (td->io_ops->flags & FIO_DISKLESSIO)) |
| 22 | return 0; |
| 23 | |
| 24 | if (lstat(f->file_name, &st) == -1) |
| 25 | return 1; |
| 26 | |
| 27 | /* |
| 28 | * if it's a special file, size is always ok for now |
| 29 | */ |
| 30 | if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) |
| 31 | return 0; |
| 32 | if (st.st_size < (off_t) f->file_size) |
| 33 | return 1; |
| 34 | |
| 35 | return 0; |
| 36 | } |
| 37 | |
| 38 | static int create_file(struct thread_data *td, struct fio_file *f) |
| 39 | { |
| 40 | unsigned long long left; |
| 41 | unsigned int bs; |
| 42 | char *b; |
| 43 | int r; |
| 44 | |
| 45 | f->fd = open(f->file_name, O_WRONLY | O_CREAT | O_TRUNC, 0644); |
| 46 | if (f->fd < 0) { |
| 47 | td_verror(td, errno, "open"); |
| 48 | return 1; |
| 49 | } |
| 50 | |
| 51 | if (ftruncate(f->fd, f->file_size) == -1) { |
| 52 | td_verror(td, errno, "ftruncate"); |
| 53 | goto err; |
| 54 | } |
| 55 | |
| 56 | if (posix_fallocate(f->fd, 0, f->file_size) < 0) { |
| 57 | td_verror(td, errno, "posix_fallocate"); |
| 58 | goto err; |
| 59 | } |
| 60 | |
| 61 | b = malloc(td->max_bs[DDIR_WRITE]); |
| 62 | memset(b, 0, td->max_bs[DDIR_WRITE]); |
| 63 | |
| 64 | left = f->file_size; |
| 65 | while (left && !td->terminate) { |
| 66 | bs = td->max_bs[DDIR_WRITE]; |
| 67 | if (bs > left) |
| 68 | bs = left; |
| 69 | |
| 70 | r = write(f->fd, b, bs); |
| 71 | |
| 72 | if (r == (int) bs) { |
| 73 | left -= bs; |
| 74 | continue; |
| 75 | } else { |
| 76 | if (r < 0) |
| 77 | td_verror(td, errno, "write"); |
| 78 | else |
| 79 | td_verror(td, EIO, "write"); |
| 80 | |
| 81 | break; |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | if (td->terminate) |
| 86 | unlink(f->file_name); |
| 87 | else if (td->create_fsync) |
| 88 | fsync(f->fd); |
| 89 | |
| 90 | free(b); |
| 91 | close(f->fd); |
| 92 | f->fd = -1; |
| 93 | return 0; |
| 94 | err: |
| 95 | close(f->fd); |
| 96 | f->fd = -1; |
| 97 | return 1; |
| 98 | } |
| 99 | |
| 100 | static unsigned long long set_rand_file_size(struct thread_data *td, |
| 101 | unsigned long long total_size) |
| 102 | { |
| 103 | unsigned long long upper = total_size; |
| 104 | unsigned long long ret; |
| 105 | long r; |
| 106 | |
| 107 | if (upper > td->file_size_high) |
| 108 | upper = td->file_size_high; |
| 109 | else if (upper < td->file_size_low) |
| 110 | return 0; |
| 111 | else if (!upper) |
| 112 | return 0; |
| 113 | |
| 114 | r = os_random_long(&td->file_size_state); |
| 115 | ret = td->file_size_low + (unsigned long long) ((double) upper * (r / (RAND_MAX + 1.0))); |
| 116 | ret -= (ret % td->rw_min_bs); |
| 117 | if (ret > upper) |
| 118 | ret = upper; |
| 119 | return ret; |
| 120 | } |
| 121 | |
| 122 | static int create_files(struct thread_data *td) |
| 123 | { |
| 124 | struct fio_file *f; |
| 125 | int err, need_create, can_extend; |
| 126 | unsigned long long total_file_size, local_file_size; |
| 127 | unsigned int i, new_files; |
| 128 | |
| 129 | new_files = 0; |
| 130 | total_file_size = td->total_file_size; |
| 131 | for_each_file(td, f, i) { |
| 132 | unsigned long long s; |
| 133 | |
| 134 | f->file_offset = td->start_offset; |
| 135 | |
| 136 | if (f->filetype != FIO_TYPE_FILE) |
| 137 | continue; |
| 138 | |
| 139 | if (f->flags & FIO_FILE_EXISTS) { |
| 140 | s = f->file_size; |
| 141 | if (s > total_file_size) |
| 142 | s = total_file_size; |
| 143 | |
| 144 | total_file_size -= s; |
| 145 | } else |
| 146 | new_files++; |
| 147 | } |
| 148 | |
| 149 | /* |
| 150 | * unless specifically asked for overwrite, let normal io extend it |
| 151 | */ |
| 152 | can_extend = !td->overwrite && !(td->io_ops->flags & FIO_NOEXTEND); |
| 153 | if (can_extend) |
| 154 | return 0; |
| 155 | |
| 156 | need_create = 0; |
| 157 | local_file_size = total_file_size; |
| 158 | if (!local_file_size) |
| 159 | local_file_size = -1; |
| 160 | |
| 161 | for_each_file(td, f, i) { |
| 162 | int file_there; |
| 163 | |
| 164 | if (f->filetype != FIO_TYPE_FILE) |
| 165 | continue; |
| 166 | if (f->flags & FIO_FILE_EXISTS) |
| 167 | continue; |
| 168 | |
| 169 | if (!td->file_size_low) |
| 170 | f->file_size = total_file_size / new_files; |
| 171 | else { |
| 172 | /* |
| 173 | * If we don't have enough space left for a file |
| 174 | * of the minimum size, bail. |
| 175 | */ |
| 176 | if (local_file_size < td->file_size_low) { |
| 177 | log_info("fio: limited to %d files\n", i); |
| 178 | new_files -= (td->nr_files - i); |
| 179 | td->nr_files = i; |
| 180 | break; |
| 181 | } |
| 182 | |
| 183 | f->file_size = set_rand_file_size(td, local_file_size); |
| 184 | local_file_size -= f->file_size; |
| 185 | } |
| 186 | |
| 187 | file_there = !file_ok(td, f); |
| 188 | |
| 189 | if (file_there && td_write(td) && !td->overwrite) { |
| 190 | unlink(f->file_name); |
| 191 | file_there = 0; |
| 192 | } |
| 193 | |
| 194 | need_create += !file_there; |
| 195 | } |
| 196 | |
| 197 | if (!need_create) |
| 198 | return 0; |
| 199 | |
| 200 | if (!td->total_file_size) { |
| 201 | log_err("Need size for create\n"); |
| 202 | td_verror(td, EINVAL, "file_size"); |
| 203 | return 1; |
| 204 | } |
| 205 | |
| 206 | temp_stall_ts = 1; |
| 207 | fprintf(f_out, "%s: Laying out IO file(s) (%u files / %LuMiB)\n", |
| 208 | td->name, new_files, |
| 209 | total_file_size >> 20); |
| 210 | |
| 211 | err = 0; |
| 212 | for_each_file(td, f, i) { |
| 213 | /* |
| 214 | * Only unlink files that we created. |
| 215 | */ |
| 216 | f->flags &= ~FIO_FILE_UNLINK; |
| 217 | if (file_ok(td, f)) { |
| 218 | if (td->unlink) |
| 219 | f->flags |= FIO_FILE_UNLINK; |
| 220 | |
| 221 | err = create_file(td, f); |
| 222 | if (err) |
| 223 | break; |
| 224 | } |
| 225 | } |
| 226 | |
| 227 | temp_stall_ts = 0; |
| 228 | return err; |
| 229 | } |
| 230 | |
| 231 | static int file_size(struct thread_data *td, struct fio_file *f) |
| 232 | { |
| 233 | struct stat st; |
| 234 | |
| 235 | if (td->overwrite) { |
| 236 | if (fstat(f->fd, &st) == -1) { |
| 237 | td_verror(td, errno, "fstat"); |
| 238 | return 1; |
| 239 | } |
| 240 | |
| 241 | f->real_file_size = st.st_size; |
| 242 | |
| 243 | if (!f->file_size || f->file_size > f->real_file_size) |
| 244 | f->file_size = f->real_file_size; |
| 245 | } else |
| 246 | f->real_file_size = f->file_size; |
| 247 | |
| 248 | return 0; |
| 249 | } |
| 250 | |
| 251 | static int bdev_size(struct thread_data *td, struct fio_file *f) |
| 252 | { |
| 253 | unsigned long long bytes; |
| 254 | int r; |
| 255 | |
| 256 | r = blockdev_size(f->fd, &bytes); |
| 257 | if (r) { |
| 258 | td_verror(td, r, "blockdev_size"); |
| 259 | return 1; |
| 260 | } |
| 261 | |
| 262 | f->real_file_size = bytes; |
| 263 | |
| 264 | /* |
| 265 | * no extend possibilities, so limit size to device size if too large |
| 266 | */ |
| 267 | if (!f->file_size || f->file_size > f->real_file_size) |
| 268 | f->file_size = f->real_file_size; |
| 269 | |
| 270 | f->file_size -= f->file_offset; |
| 271 | return 0; |
| 272 | } |
| 273 | |
| 274 | static int get_file_size(struct thread_data *td, struct fio_file *f) |
| 275 | { |
| 276 | int ret = 0; |
| 277 | |
| 278 | if (f->filetype == FIO_TYPE_FILE) { |
| 279 | if (!(f->flags & FIO_FILE_EXISTS)) |
| 280 | ret = file_size(td, f); |
| 281 | } else if (f->filetype == FIO_TYPE_BD) |
| 282 | ret = bdev_size(td, f); |
| 283 | else |
| 284 | f->real_file_size = -1; |
| 285 | |
| 286 | if (ret) |
| 287 | return ret; |
| 288 | |
| 289 | if (f->file_offset > f->real_file_size) { |
| 290 | log_err("%s: offset extends end (%Lu > %Lu)\n", td->name, f->file_offset, f->real_file_size); |
| 291 | return 1; |
| 292 | } |
| 293 | |
| 294 | return 0; |
| 295 | } |
| 296 | |
| 297 | int file_invalidate_cache(struct thread_data *td, struct fio_file *f) |
| 298 | { |
| 299 | int ret = 0; |
| 300 | |
| 301 | if (td->odirect) |
| 302 | return 0; |
| 303 | |
| 304 | /* |
| 305 | * FIXME: add blockdev flushing too |
| 306 | */ |
| 307 | if (f->mmap) |
| 308 | ret = madvise(f->mmap, f->file_size, MADV_DONTNEED); |
| 309 | else if (f->filetype == FIO_TYPE_FILE) { |
| 310 | ret = fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_DONTNEED); |
| 311 | } else if (f->filetype == FIO_TYPE_BD) { |
| 312 | ret = blockdev_invalidate_cache(f->fd); |
| 313 | } else if (f->filetype == FIO_TYPE_CHAR) |
| 314 | ret = 0; |
| 315 | |
| 316 | if (ret < 0) { |
| 317 | td_verror(td, errno, "invalidate_cache"); |
| 318 | return 1; |
| 319 | } |
| 320 | |
| 321 | return ret; |
| 322 | } |
| 323 | |
| 324 | void generic_close_file(struct thread_data fio_unused *td, struct fio_file *f) |
| 325 | { |
| 326 | close(f->fd); |
| 327 | f->fd = -1; |
| 328 | } |
| 329 | |
| 330 | int generic_open_file(struct thread_data *td, struct fio_file *f) |
| 331 | { |
| 332 | int flags = 0; |
| 333 | |
| 334 | if (td->odirect) |
| 335 | flags |= OS_O_DIRECT; |
| 336 | if (td->sync_io) |
| 337 | flags |= O_SYNC; |
| 338 | |
| 339 | if (td_write(td) || td_rw(td)) { |
| 340 | flags |= O_RDWR; |
| 341 | |
| 342 | if (f->filetype == FIO_TYPE_FILE) |
| 343 | flags |= O_CREAT; |
| 344 | |
| 345 | f->fd = open(f->file_name, flags, 0600); |
| 346 | } else { |
| 347 | if (f->filetype == FIO_TYPE_CHAR) |
| 348 | flags |= O_RDWR; |
| 349 | else |
| 350 | flags |= O_RDONLY; |
| 351 | |
| 352 | f->fd = open(f->file_name, flags); |
| 353 | } |
| 354 | |
| 355 | if (f->fd == -1) { |
| 356 | int __e = errno; |
| 357 | |
| 358 | td_verror(td, __e, "open"); |
| 359 | if (__e == EINVAL && td->odirect) |
| 360 | log_err("fio: destination does not support O_DIRECT\n"); |
| 361 | if (__e == EMFILE) |
| 362 | log_err("fio: try reducing/setting openfiles (failed at %u of %u)\n", td->nr_open_files, td->nr_files); |
| 363 | return 1; |
| 364 | } |
| 365 | |
| 366 | if (get_file_size(td, f)) |
| 367 | goto err; |
| 368 | |
| 369 | if (td->invalidate_cache && file_invalidate_cache(td, f)) |
| 370 | goto err; |
| 371 | |
| 372 | if (!td_random(td)) { |
| 373 | if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_SEQUENTIAL) < 0) { |
| 374 | td_verror(td, errno, "fadvise"); |
| 375 | goto err; |
| 376 | } |
| 377 | } else { |
| 378 | if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_RANDOM) < 0) { |
| 379 | td_verror(td, errno, "fadvise"); |
| 380 | goto err; |
| 381 | } |
| 382 | } |
| 383 | |
| 384 | return 0; |
| 385 | err: |
| 386 | close(f->fd); |
| 387 | return 1; |
| 388 | } |
| 389 | |
| 390 | int open_files(struct thread_data *td) |
| 391 | { |
| 392 | struct fio_file *f; |
| 393 | unsigned int i; |
| 394 | int err = 0; |
| 395 | |
| 396 | for_each_file(td, f, i) { |
| 397 | err = td_io_open_file(td, f); |
| 398 | if (err) |
| 399 | break; |
| 400 | |
| 401 | if (td->open_files == td->nr_open_files) |
| 402 | break; |
| 403 | } |
| 404 | |
| 405 | if (!err) |
| 406 | return 0; |
| 407 | |
| 408 | for_each_file(td, f, i) |
| 409 | td_io_close_file(td, f); |
| 410 | |
| 411 | return err; |
| 412 | } |
| 413 | |
| 414 | int setup_files(struct thread_data *td) |
| 415 | { |
| 416 | struct fio_file *f; |
| 417 | unsigned int i; |
| 418 | int err; |
| 419 | |
| 420 | /* |
| 421 | * if ioengine defines a setup() method, it's responsible for |
| 422 | * setting up everything in the td->files[] area. |
| 423 | */ |
| 424 | if (td->io_ops->setup) |
| 425 | return td->io_ops->setup(td); |
| 426 | |
| 427 | if (create_files(td)) |
| 428 | return 1; |
| 429 | |
| 430 | err = open_files(td); |
| 431 | if (err) |
| 432 | return err; |
| 433 | |
| 434 | /* |
| 435 | * Recalculate the total file size now that files are set up. |
| 436 | */ |
| 437 | td->total_file_size = 0; |
| 438 | for_each_file(td, f, i) |
| 439 | td->total_file_size += f->file_size; |
| 440 | |
| 441 | td->io_size = td->total_file_size; |
| 442 | if (td->io_size == 0) { |
| 443 | log_err("%s: no io blocks\n", td->name); |
| 444 | td_verror(td, EINVAL, "total_file_size"); |
| 445 | return 1; |
| 446 | } |
| 447 | |
| 448 | if (!td->zone_size) |
| 449 | td->zone_size = td->io_size; |
| 450 | |
| 451 | td->total_io_size = td->io_size * td->loops; |
| 452 | |
| 453 | for_each_file(td, f, i) |
| 454 | td_io_close_file(td, f); |
| 455 | |
| 456 | return err; |
| 457 | } |
| 458 | |
| 459 | void close_files(struct thread_data *td) |
| 460 | { |
| 461 | struct fio_file *f; |
| 462 | unsigned int i; |
| 463 | |
| 464 | for_each_file(td, f, i) { |
| 465 | if (!f->file_name && (f->flags & FIO_FILE_UNLINK) && |
| 466 | f->filetype == FIO_TYPE_FILE) { |
| 467 | unlink(f->file_name); |
| 468 | free(f->file_name); |
| 469 | f->file_name = NULL; |
| 470 | } |
| 471 | |
| 472 | td_io_close_file(td, f); |
| 473 | |
| 474 | if (f->file_map) |
| 475 | free(f->file_map); |
| 476 | } |
| 477 | |
| 478 | td->filename = NULL; |
| 479 | td->files = NULL; |
| 480 | td->nr_files = 0; |
| 481 | } |
| 482 | |
| 483 | static void get_file_type(struct fio_file *f) |
| 484 | { |
| 485 | struct stat sb; |
| 486 | |
| 487 | f->filetype = FIO_TYPE_FILE; |
| 488 | |
| 489 | if (!lstat(f->file_name, &sb)) { |
| 490 | f->flags |= FIO_FILE_EXISTS; |
| 491 | |
| 492 | if (S_ISBLK(sb.st_mode)) |
| 493 | f->filetype = FIO_TYPE_BD; |
| 494 | else if (S_ISCHR(sb.st_mode)) |
| 495 | f->filetype = FIO_TYPE_CHAR; |
| 496 | else { |
| 497 | /* |
| 498 | * might as well do this here, and save a stat later on |
| 499 | */ |
| 500 | f->real_file_size = sb.st_size; |
| 501 | f->file_size = f->real_file_size; |
| 502 | } |
| 503 | } |
| 504 | } |
| 505 | |
| 506 | void add_file(struct thread_data *td, const char *fname) |
| 507 | { |
| 508 | int cur_files = td->files_index; |
| 509 | struct fio_file *f; |
| 510 | |
| 511 | td->files = realloc(td->files, (cur_files + 1) * sizeof(*f)); |
| 512 | |
| 513 | f = &td->files[cur_files]; |
| 514 | memset(f, 0, sizeof(*f)); |
| 515 | f->fd = -1; |
| 516 | f->file_name = strdup(fname); |
| 517 | |
| 518 | get_file_type(f); |
| 519 | |
| 520 | td->files_index++; |
| 521 | if (f->filetype == FIO_TYPE_FILE) |
| 522 | td->nr_normal_files++; |
| 523 | } |
| 524 | |
| 525 | void get_file(struct fio_file *f) |
| 526 | { |
| 527 | f->references++; |
| 528 | } |
| 529 | |
| 530 | void put_file(struct thread_data *td, struct fio_file *f) |
| 531 | { |
| 532 | if (!(f->flags & FIO_FILE_OPEN)) |
| 533 | return; |
| 534 | |
| 535 | assert(f->references); |
| 536 | if (--f->references) |
| 537 | return; |
| 538 | |
| 539 | if (should_fsync(td) && td->fsync_on_close) |
| 540 | fsync(f->fd); |
| 541 | |
| 542 | if (td->io_ops->close_file) |
| 543 | td->io_ops->close_file(td, f); |
| 544 | td->nr_open_files--; |
| 545 | f->flags &= ~FIO_FILE_OPEN; |
| 546 | } |
| 547 | |
| 548 | static int recurse_dir(struct thread_data *td, const char *dirname) |
| 549 | { |
| 550 | struct dirent *dir; |
| 551 | int ret = 0; |
| 552 | DIR *D; |
| 553 | |
| 554 | D = opendir(dirname); |
| 555 | if (!D) { |
| 556 | td_verror(td, errno, "opendir"); |
| 557 | return 1; |
| 558 | } |
| 559 | |
| 560 | while ((dir = readdir(D)) != NULL) { |
| 561 | char full_path[PATH_MAX]; |
| 562 | struct stat sb; |
| 563 | |
| 564 | if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, "..")) |
| 565 | continue; |
| 566 | |
| 567 | sprintf(full_path, "%s/%s", dirname, dir->d_name); |
| 568 | |
| 569 | if (lstat(full_path, &sb) == -1) { |
| 570 | if (errno != ENOENT) { |
| 571 | td_verror(td, errno, "stat"); |
| 572 | return 1; |
| 573 | } |
| 574 | } |
| 575 | |
| 576 | if (S_ISREG(sb.st_mode)) { |
| 577 | add_file(td, full_path); |
| 578 | td->nr_files++; |
| 579 | continue; |
| 580 | } |
| 581 | |
| 582 | if ((ret = recurse_dir(td, full_path)) != 0) |
| 583 | break; |
| 584 | } |
| 585 | |
| 586 | closedir(D); |
| 587 | return ret; |
| 588 | } |
| 589 | |
| 590 | int add_dir_files(struct thread_data *td, const char *path) |
| 591 | { |
| 592 | return recurse_dir(td, path); |
| 593 | } |