filesetup.c revision da27a4bf0f9753fcc9da7b63f1be482fc0349907
1#include <unistd.h> 2#include <fcntl.h> 3#include <string.h> 4#include <assert.h> 5#include <dirent.h> 6#include <libgen.h> 7#include <sys/stat.h> 8#include <sys/mman.h> 9#include <sys/types.h> 10 11#include "fio.h" 12#include "smalloc.h" 13#include "filehash.h" 14#include "options.h" 15#include "os/os.h" 16#include "hash.h" 17#include "lib/axmap.h" 18 19#ifdef CONFIG_LINUX_FALLOCATE 20#include <linux/falloc.h> 21#endif 22 23static int root_warn; 24 25static FLIST_HEAD(filename_list); 26 27static inline void clear_error(struct thread_data *td) 28{ 29 td->error = 0; 30 td->verror[0] = '\0'; 31} 32 33/* 34 * Leaves f->fd open on success, caller must close 35 */ 36static int extend_file(struct thread_data *td, struct fio_file *f) 37{ 38 int r, new_layout = 0, unlink_file = 0, flags; 39 unsigned long long left; 40 unsigned int bs; 41 char *b = NULL; 42 43 if (read_only) { 44 log_err("fio: refusing extend of file due to read-only\n"); 45 return 0; 46 } 47 48 /* 49 * check if we need to lay the file out complete again. fio 50 * does that for operations involving reads, or for writes 51 * where overwrite is set 52 */ 53 if (td_read(td) || 54 (td_write(td) && td->o.overwrite && !td->o.file_append) || 55 (td_write(td) && td->io_ops->flags & FIO_NOEXTEND)) 56 new_layout = 1; 57 if (td_write(td) && !td->o.overwrite && !td->o.file_append) 58 unlink_file = 1; 59 60 if (unlink_file || new_layout) { 61 dprint(FD_FILE, "layout unlink %s\n", f->file_name); 62 if ((unlink(f->file_name) < 0) && (errno != ENOENT)) { 63 td_verror(td, errno, "unlink"); 64 return 1; 65 } 66 } 67 68 flags = O_WRONLY | O_CREAT; 69 if (new_layout) 70 flags |= O_TRUNC; 71 72 dprint(FD_FILE, "open file %s, flags %x\n", f->file_name, flags); 73 f->fd = open(f->file_name, flags, 0644); 74 if (f->fd < 0) { 75 td_verror(td, errno, "open"); 76 return 1; 77 } 78 79#ifdef CONFIG_POSIX_FALLOCATE 80 if (!td->o.fill_device) { 81 switch (td->o.fallocate_mode) { 82 case FIO_FALLOCATE_NONE: 83 break; 84 case FIO_FALLOCATE_POSIX: 85 dprint(FD_FILE, "posix_fallocate file %s size %llu\n", 86 f->file_name, 87 (unsigned long long) f->real_file_size); 88 89 r = posix_fallocate(f->fd, 0, f->real_file_size); 90 if (r > 0) { 91 log_err("fio: posix_fallocate fails: %s\n", 92 strerror(r)); 93 } 94 break; 95#ifdef CONFIG_LINUX_FALLOCATE 96 case FIO_FALLOCATE_KEEP_SIZE: 97 dprint(FD_FILE, 98 "fallocate(FALLOC_FL_KEEP_SIZE) " 99 "file %s size %llu\n", f->file_name, 100 (unsigned long long) f->real_file_size); 101 102 r = fallocate(f->fd, FALLOC_FL_KEEP_SIZE, 0, 103 f->real_file_size); 104 if (r != 0) 105 td_verror(td, errno, "fallocate"); 106 107 break; 108#endif /* CONFIG_LINUX_FALLOCATE */ 109 default: 110 log_err("fio: unknown fallocate mode: %d\n", 111 td->o.fallocate_mode); 112 assert(0); 113 } 114 } 115#endif /* CONFIG_POSIX_FALLOCATE */ 116 117 if (!new_layout) 118 goto done; 119 120 /* 121 * The size will be -1ULL when fill_device is used, so don't truncate 122 * or fallocate this file, just write it 123 */ 124 if (!td->o.fill_device) { 125 dprint(FD_FILE, "truncate file %s, size %llu\n", f->file_name, 126 (unsigned long long) f->real_file_size); 127 if (ftruncate(f->fd, f->real_file_size) == -1) { 128 if (errno != EFBIG) { 129 td_verror(td, errno, "ftruncate"); 130 goto err; 131 } 132 } 133 } 134 135 b = malloc(td->o.max_bs[DDIR_WRITE]); 136 137 left = f->real_file_size; 138 while (left && !td->terminate) { 139 bs = td->o.max_bs[DDIR_WRITE]; 140 if (bs > left) 141 bs = left; 142 143 fill_io_buffer(td, b, bs, bs); 144 145 r = write(f->fd, b, bs); 146 147 if (r > 0) { 148 left -= r; 149 continue; 150 } else { 151 if (r < 0) { 152 int __e = errno; 153 154 if (__e == ENOSPC) { 155 if (td->o.fill_device) 156 break; 157 log_info("fio: ENOSPC on laying out " 158 "file, stopping\n"); 159 break; 160 } 161 td_verror(td, errno, "write"); 162 } else 163 td_verror(td, EIO, "write"); 164 165 break; 166 } 167 } 168 169 if (td->terminate) { 170 dprint(FD_FILE, "terminate unlink %s\n", f->file_name); 171 unlink(f->file_name); 172 } else if (td->o.create_fsync) { 173 if (fsync(f->fd) < 0) { 174 td_verror(td, errno, "fsync"); 175 goto err; 176 } 177 } 178 if (td->o.fill_device && !td_write(td)) { 179 fio_file_clear_size_known(f); 180 if (td_io_get_file_size(td, f)) 181 goto err; 182 if (f->io_size > f->real_file_size) 183 f->io_size = f->real_file_size; 184 } 185 186 free(b); 187done: 188 return 0; 189err: 190 close(f->fd); 191 f->fd = -1; 192 if (b) 193 free(b); 194 return 1; 195} 196 197static int pre_read_file(struct thread_data *td, struct fio_file *f) 198{ 199 int ret = 0, r, did_open = 0, old_runstate; 200 unsigned long long left; 201 unsigned int bs; 202 char *b; 203 204 if (td->io_ops->flags & FIO_PIPEIO) 205 return 0; 206 207 if (!fio_file_open(f)) { 208 if (td->io_ops->open_file(td, f)) { 209 log_err("fio: cannot pre-read, failed to open file\n"); 210 return 1; 211 } 212 did_open = 1; 213 } 214 215 old_runstate = td_bump_runstate(td, TD_PRE_READING); 216 217 bs = td->o.max_bs[DDIR_READ]; 218 b = malloc(bs); 219 memset(b, 0, bs); 220 221 if (lseek(f->fd, f->file_offset, SEEK_SET) < 0) { 222 td_verror(td, errno, "lseek"); 223 log_err("fio: failed to lseek pre-read file\n"); 224 ret = 1; 225 goto error; 226 } 227 228 left = f->io_size; 229 230 while (left && !td->terminate) { 231 if (bs > left) 232 bs = left; 233 234 r = read(f->fd, b, bs); 235 236 if (r == (int) bs) { 237 left -= bs; 238 continue; 239 } else { 240 td_verror(td, EIO, "pre_read"); 241 break; 242 } 243 } 244 245error: 246 td_restore_runstate(td, old_runstate); 247 248 if (did_open) 249 td->io_ops->close_file(td, f); 250 251 free(b); 252 return ret; 253} 254 255static unsigned long long get_rand_file_size(struct thread_data *td) 256{ 257 unsigned long long ret, sized; 258 unsigned long r; 259 260 if (td->o.use_os_rand) { 261 r = os_random_long(&td->file_size_state); 262 sized = td->o.file_size_high - td->o.file_size_low; 263 ret = (unsigned long long) ((double) sized * (r / (OS_RAND_MAX + 1.0))); 264 } else { 265 r = __rand(&td->__file_size_state); 266 sized = td->o.file_size_high - td->o.file_size_low; 267 ret = (unsigned long long) ((double) sized * (r / (FRAND_MAX + 1.0))); 268 } 269 270 ret += td->o.file_size_low; 271 ret -= (ret % td->o.rw_min_bs); 272 return ret; 273} 274 275static int file_size(struct thread_data *td, struct fio_file *f) 276{ 277 struct stat st; 278 279 if (stat(f->file_name, &st) == -1) { 280 td_verror(td, errno, "fstat"); 281 return 1; 282 } 283 284 f->real_file_size = st.st_size; 285 return 0; 286} 287 288static int bdev_size(struct thread_data *td, struct fio_file *f) 289{ 290 unsigned long long bytes = 0; 291 int r; 292 293 if (td->io_ops->open_file(td, f)) { 294 log_err("fio: failed opening blockdev %s for size check\n", 295 f->file_name); 296 return 1; 297 } 298 299 r = blockdev_size(f, &bytes); 300 if (r) { 301 td_verror(td, r, "blockdev_size"); 302 goto err; 303 } 304 305 if (!bytes) { 306 log_err("%s: zero sized block device?\n", f->file_name); 307 goto err; 308 } 309 310 f->real_file_size = bytes; 311 td->io_ops->close_file(td, f); 312 return 0; 313err: 314 td->io_ops->close_file(td, f); 315 return 1; 316} 317 318static int char_size(struct thread_data *td, struct fio_file *f) 319{ 320#ifdef FIO_HAVE_CHARDEV_SIZE 321 unsigned long long bytes = 0; 322 int r; 323 324 if (td->io_ops->open_file(td, f)) { 325 log_err("fio: failed opening blockdev %s for size check\n", 326 f->file_name); 327 return 1; 328 } 329 330 r = chardev_size(f, &bytes); 331 if (r) { 332 td_verror(td, r, "chardev_size"); 333 goto err; 334 } 335 336 if (!bytes) { 337 log_err("%s: zero sized char device?\n", f->file_name); 338 goto err; 339 } 340 341 f->real_file_size = bytes; 342 td->io_ops->close_file(td, f); 343 return 0; 344err: 345 td->io_ops->close_file(td, f); 346 return 1; 347#else 348 f->real_file_size = -1ULL; 349 return 0; 350#endif 351} 352 353static int get_file_size(struct thread_data *td, struct fio_file *f) 354{ 355 int ret = 0; 356 357 if (fio_file_size_known(f)) 358 return 0; 359 360 if (f->filetype == FIO_TYPE_FILE) 361 ret = file_size(td, f); 362 else if (f->filetype == FIO_TYPE_BD) 363 ret = bdev_size(td, f); 364 else if (f->filetype == FIO_TYPE_CHAR) 365 ret = char_size(td, f); 366 else 367 f->real_file_size = -1; 368 369 if (ret) 370 return ret; 371 372 if (f->file_offset > f->real_file_size) { 373 log_err("%s: offset extends end (%llu > %llu)\n", td->o.name, 374 (unsigned long long) f->file_offset, 375 (unsigned long long) f->real_file_size); 376 return 1; 377 } 378 379 fio_file_set_size_known(f); 380 return 0; 381} 382 383static int __file_invalidate_cache(struct thread_data *td, struct fio_file *f, 384 unsigned long long off, 385 unsigned long long len) 386{ 387 int ret = 0; 388 389 if (len == -1ULL) 390 len = f->io_size; 391 if (off == -1ULL) 392 off = f->file_offset; 393 394 if (len == -1ULL || off == -1ULL) 395 return 0; 396 397 dprint(FD_IO, "invalidate cache %s: %llu/%llu\n", f->file_name, off, 398 len); 399 400 if (f->mmap_ptr) { 401 ret = posix_madvise(f->mmap_ptr, f->mmap_sz, POSIX_MADV_DONTNEED); 402#ifdef FIO_MADV_FREE 403 if (f->filetype == FIO_TYPE_BD) 404 (void) posix_madvise(f->mmap_ptr, f->mmap_sz, FIO_MADV_FREE); 405#endif 406 } else if (f->filetype == FIO_TYPE_FILE) { 407 ret = posix_fadvise(f->fd, off, len, POSIX_FADV_DONTNEED); 408 } else if (f->filetype == FIO_TYPE_BD) { 409 ret = blockdev_invalidate_cache(f); 410 if (ret < 0 && errno == EACCES && geteuid()) { 411 if (!root_warn) { 412 log_err("fio: only root may flush block " 413 "devices. Cache flush bypassed!\n"); 414 root_warn = 1; 415 } 416 ret = 0; 417 } 418 } else if (f->filetype == FIO_TYPE_CHAR || f->filetype == FIO_TYPE_PIPE) 419 ret = 0; 420 421 /* 422 * Cache flushing isn't a fatal condition, and we know it will 423 * happen on some platforms where we don't have the proper 424 * function to flush eg block device caches. So just warn and 425 * continue on our way. 426 */ 427 if (ret) { 428 log_info("fio: cache invalidation of %s failed: %s\n", f->file_name, strerror(errno)); 429 ret = 0; 430 } 431 432 return 0; 433 434} 435 436int file_invalidate_cache(struct thread_data *td, struct fio_file *f) 437{ 438 if (!fio_file_open(f)) 439 return 0; 440 441 return __file_invalidate_cache(td, f, -1ULL, -1ULL); 442} 443 444int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f) 445{ 446 int ret = 0; 447 448 dprint(FD_FILE, "fd close %s\n", f->file_name); 449 450 remove_file_hash(f); 451 452 if (close(f->fd) < 0) 453 ret = errno; 454 455 f->fd = -1; 456 457 if (f->shadow_fd != -1) { 458 close(f->shadow_fd); 459 f->shadow_fd = -1; 460 } 461 462 f->engine_data = 0; 463 return ret; 464} 465 466int file_lookup_open(struct fio_file *f, int flags) 467{ 468 struct fio_file *__f; 469 int from_hash; 470 471 __f = lookup_file_hash(f->file_name); 472 if (__f) { 473 dprint(FD_FILE, "found file in hash %s\n", f->file_name); 474 /* 475 * racy, need the __f->lock locked 476 */ 477 f->lock = __f->lock; 478 from_hash = 1; 479 } else { 480 dprint(FD_FILE, "file not found in hash %s\n", f->file_name); 481 from_hash = 0; 482 } 483 484 f->fd = open(f->file_name, flags, 0600); 485 return from_hash; 486} 487 488static int file_close_shadow_fds(struct thread_data *td) 489{ 490 struct fio_file *f; 491 int num_closed = 0; 492 unsigned int i; 493 494 for_each_file(td, f, i) { 495 if (f->shadow_fd == -1) 496 continue; 497 498 close(f->shadow_fd); 499 f->shadow_fd = -1; 500 num_closed++; 501 } 502 503 return num_closed; 504} 505 506int generic_open_file(struct thread_data *td, struct fio_file *f) 507{ 508 int is_std = 0; 509 int flags = 0; 510 int from_hash = 0; 511 512 dprint(FD_FILE, "fd open %s\n", f->file_name); 513 514 if (td_trim(td) && f->filetype != FIO_TYPE_BD) { 515 log_err("fio: trim only applies to block device\n"); 516 return 1; 517 } 518 519 if (!strcmp(f->file_name, "-")) { 520 if (td_rw(td)) { 521 log_err("fio: can't read/write to stdin/out\n"); 522 return 1; 523 } 524 is_std = 1; 525 526 /* 527 * move output logging to stderr, if we are writing to stdout 528 */ 529 if (td_write(td)) 530 f_out = stderr; 531 } 532 533 if (td_trim(td)) 534 goto skip_flags; 535 if (td->o.odirect) 536 flags |= OS_O_DIRECT; 537 if (td->o.oatomic) { 538 if (!FIO_O_ATOMIC) { 539 td_verror(td, EINVAL, "OS does not support atomic IO"); 540 return 1; 541 } 542 flags |= OS_O_DIRECT | FIO_O_ATOMIC; 543 } 544 if (td->o.sync_io) 545 flags |= O_SYNC; 546 if (td->o.create_on_open) 547 flags |= O_CREAT; 548skip_flags: 549 if (f->filetype != FIO_TYPE_FILE) 550 flags |= FIO_O_NOATIME; 551 552open_again: 553 if (td_write(td)) { 554 if (!read_only) 555 flags |= O_RDWR; 556 557 if (f->filetype == FIO_TYPE_FILE) 558 flags |= O_CREAT; 559 560 if (is_std) 561 f->fd = dup(STDOUT_FILENO); 562 else 563 from_hash = file_lookup_open(f, flags); 564 } else if (td_read(td)) { 565 if (f->filetype == FIO_TYPE_CHAR && !read_only) 566 flags |= O_RDWR; 567 else 568 flags |= O_RDONLY; 569 570 if (is_std) 571 f->fd = dup(STDIN_FILENO); 572 else 573 from_hash = file_lookup_open(f, flags); 574 } else { //td trim 575 flags |= O_RDWR; 576 from_hash = file_lookup_open(f, flags); 577 } 578 579 if (f->fd == -1) { 580 char buf[FIO_VERROR_SIZE]; 581 int __e = errno; 582 583 if (__e == EPERM && (flags & FIO_O_NOATIME)) { 584 flags &= ~FIO_O_NOATIME; 585 goto open_again; 586 } 587 if (__e == EMFILE && file_close_shadow_fds(td)) 588 goto open_again; 589 590 snprintf(buf, sizeof(buf), "open(%s)", f->file_name); 591 592 if (__e == EINVAL && (flags & OS_O_DIRECT)) { 593 log_err("fio: looks like your file system does not " \ 594 "support direct=1/buffered=0\n"); 595 } 596 597 td_verror(td, __e, buf); 598 } 599 600 if (!from_hash && f->fd != -1) { 601 if (add_file_hash(f)) { 602 int fio_unused ret; 603 604 /* 605 * Stash away descriptor for later close. This is to 606 * work-around a "feature" on Linux, where a close of 607 * an fd that has been opened for write will trigger 608 * udev to call blkid to check partitions, fs id, etc. 609 * That pollutes the device cache, which can slow down 610 * unbuffered accesses. 611 */ 612 if (f->shadow_fd == -1) 613 f->shadow_fd = f->fd; 614 else { 615 /* 616 * OK to ignore, we haven't done anything 617 * with it 618 */ 619 ret = generic_close_file(td, f); 620 } 621 goto open_again; 622 } 623 } 624 625 return 0; 626} 627 628int generic_get_file_size(struct thread_data *td, struct fio_file *f) 629{ 630 return get_file_size(td, f); 631} 632 633/* 634 * open/close all files, so that ->real_file_size gets set 635 */ 636static int get_file_sizes(struct thread_data *td) 637{ 638 struct fio_file *f; 639 unsigned int i; 640 int err = 0; 641 642 for_each_file(td, f, i) { 643 dprint(FD_FILE, "get file size for %p/%d/%p\n", f, i, 644 f->file_name); 645 646 if (td_io_get_file_size(td, f)) { 647 if (td->error != ENOENT) { 648 log_err("%s\n", td->verror); 649 err = 1; 650 } 651 clear_error(td); 652 } 653 654 if (f->real_file_size == -1ULL && td->o.size) 655 f->real_file_size = td->o.size / td->o.nr_files; 656 } 657 658 return err; 659} 660 661struct fio_mount { 662 struct flist_head list; 663 const char *base; 664 char __base[256]; 665 unsigned int key; 666}; 667 668/* 669 * Get free number of bytes for each file on each unique mount. 670 */ 671static unsigned long long get_fs_free_counts(struct thread_data *td) 672{ 673 struct flist_head *n, *tmp; 674 unsigned long long ret = 0; 675 struct fio_mount *fm; 676 FLIST_HEAD(list); 677 struct fio_file *f; 678 unsigned int i; 679 680 for_each_file(td, f, i) { 681 struct stat sb; 682 char buf[256]; 683 684 if (f->filetype == FIO_TYPE_BD || f->filetype == FIO_TYPE_CHAR) { 685 if (f->real_file_size != -1ULL) 686 ret += f->real_file_size; 687 continue; 688 } else if (f->filetype != FIO_TYPE_FILE) 689 continue; 690 691 buf[255] = '\0'; 692 strncpy(buf, f->file_name, 255); 693 694 if (stat(buf, &sb) < 0) { 695 if (errno != ENOENT) 696 break; 697 strcpy(buf, "."); 698 if (stat(buf, &sb) < 0) 699 break; 700 } 701 702 fm = NULL; 703 flist_for_each(n, &list) { 704 fm = flist_entry(n, struct fio_mount, list); 705 if (fm->key == sb.st_dev) 706 break; 707 708 fm = NULL; 709 } 710 711 if (fm) 712 continue; 713 714 fm = malloc(sizeof(*fm)); 715 strcpy(fm->__base, buf); 716 fm->base = basename(fm->__base); 717 fm->key = sb.st_dev; 718 flist_add(&fm->list, &list); 719 } 720 721 flist_for_each_safe(n, tmp, &list) { 722 unsigned long long sz; 723 724 fm = flist_entry(n, struct fio_mount, list); 725 flist_del(&fm->list); 726 727 sz = get_fs_size(fm->base); 728 if (sz && sz != -1ULL) 729 ret += sz; 730 731 free(fm); 732 } 733 734 return ret; 735} 736 737uint64_t get_start_offset(struct thread_data *td, struct fio_file *f) 738{ 739 struct thread_options *o = &td->o; 740 741 if (o->file_append && f->filetype == FIO_TYPE_FILE) 742 return f->real_file_size; 743 744 return td->o.start_offset + 745 (td->thread_number - 1) * td->o.offset_increment; 746} 747 748/* 749 * Open the files and setup files sizes, creating files if necessary. 750 */ 751int setup_files(struct thread_data *td) 752{ 753 unsigned long long total_size, extend_size; 754 struct thread_options *o = &td->o; 755 struct fio_file *f; 756 unsigned int i, nr_fs_extra = 0; 757 int err = 0, need_extend; 758 int old_state; 759 const unsigned int bs = td_min_bs(td); 760 uint64_t fs = 0; 761 762 dprint(FD_FILE, "setup files\n"); 763 764 old_state = td_bump_runstate(td, TD_SETTING_UP); 765 766 if (o->read_iolog_file) 767 goto done; 768 769 /* 770 * if ioengine defines a setup() method, it's responsible for 771 * opening the files and setting f->real_file_size to indicate 772 * the valid range for that file. 773 */ 774 if (td->io_ops->setup) 775 err = td->io_ops->setup(td); 776 else 777 err = get_file_sizes(td); 778 779 if (err) 780 goto err_out; 781 782 /* 783 * check sizes. if the files/devices do not exist and the size 784 * isn't passed to fio, abort. 785 */ 786 total_size = 0; 787 for_each_file(td, f, i) { 788 if (f->real_file_size == -1ULL) 789 total_size = -1ULL; 790 else 791 total_size += f->real_file_size; 792 } 793 794 if (o->fill_device) 795 td->fill_device_size = get_fs_free_counts(td); 796 797 /* 798 * device/file sizes are zero and no size given, punt 799 */ 800 if ((!total_size || total_size == -1ULL) && !o->size && 801 !(td->io_ops->flags & FIO_NOIO) && !o->fill_device && 802 !(o->nr_files && (o->file_size_low || o->file_size_high))) { 803 log_err("%s: you need to specify size=\n", o->name); 804 td_verror(td, EINVAL, "total_file_size"); 805 goto err_out; 806 } 807 808 /* 809 * Calculate per-file size and potential extra size for the 810 * first files, if needed. 811 */ 812 if (!o->file_size_low && o->nr_files) { 813 uint64_t all_fs; 814 815 fs = o->size / o->nr_files; 816 all_fs = fs * o->nr_files; 817 818 if (all_fs < o->size) 819 nr_fs_extra = (o->size - all_fs) / bs; 820 } 821 822 /* 823 * now file sizes are known, so we can set ->io_size. if size= is 824 * not given, ->io_size is just equal to ->real_file_size. if size 825 * is given, ->io_size is size / nr_files. 826 */ 827 extend_size = total_size = 0; 828 need_extend = 0; 829 for_each_file(td, f, i) { 830 f->file_offset = get_start_offset(td, f); 831 832 if (!o->file_size_low) { 833 /* 834 * no file size range given, file size is equal to 835 * total size divided by number of files. If that is 836 * zero, set it to the real file size. If the size 837 * doesn't divide nicely with the min blocksize, 838 * make the first files bigger. 839 */ 840 f->io_size = fs; 841 if (nr_fs_extra) { 842 nr_fs_extra--; 843 f->io_size += bs; 844 } 845 846 if (!f->io_size) 847 f->io_size = f->real_file_size - f->file_offset; 848 } else if (f->real_file_size < o->file_size_low || 849 f->real_file_size > o->file_size_high) { 850 if (f->file_offset > o->file_size_low) 851 goto err_offset; 852 /* 853 * file size given. if it's fixed, use that. if it's a 854 * range, generate a random size in-between. 855 */ 856 if (o->file_size_low == o->file_size_high) 857 f->io_size = o->file_size_low - f->file_offset; 858 else { 859 f->io_size = get_rand_file_size(td) 860 - f->file_offset; 861 } 862 } else 863 f->io_size = f->real_file_size - f->file_offset; 864 865 if (f->io_size == -1ULL) 866 total_size = -1ULL; 867 else { 868 if (o->size_percent) 869 f->io_size = (f->io_size * o->size_percent) / 100; 870 total_size += f->io_size; 871 } 872 873 if (f->filetype == FIO_TYPE_FILE && 874 (f->io_size + f->file_offset) > f->real_file_size && 875 !(td->io_ops->flags & FIO_DISKLESSIO)) { 876 if (!o->create_on_open) { 877 need_extend++; 878 extend_size += (f->io_size + f->file_offset); 879 } else 880 f->real_file_size = f->io_size + f->file_offset; 881 fio_file_set_extend(f); 882 } 883 } 884 885 if (!o->size || o->size > total_size) 886 o->size = total_size; 887 888 /* 889 * See if we need to extend some files 890 */ 891 if (need_extend) { 892 temp_stall_ts = 1; 893 if (output_format == FIO_OUTPUT_NORMAL) 894 log_info("%s: Laying out IO file(s) (%u file(s) /" 895 " %lluMB)\n", o->name, need_extend, 896 extend_size >> 20); 897 898 for_each_file(td, f, i) { 899 unsigned long long old_len = -1ULL, extend_len = -1ULL; 900 901 if (!fio_file_extend(f)) 902 continue; 903 904 assert(f->filetype == FIO_TYPE_FILE); 905 fio_file_clear_extend(f); 906 if (!o->fill_device) { 907 old_len = f->real_file_size; 908 extend_len = f->io_size + f->file_offset - 909 old_len; 910 } 911 f->real_file_size = (f->io_size + f->file_offset); 912 err = extend_file(td, f); 913 if (err) 914 break; 915 916 err = __file_invalidate_cache(td, f, old_len, 917 extend_len); 918 close(f->fd); 919 f->fd = -1; 920 if (err) 921 break; 922 } 923 temp_stall_ts = 0; 924 } 925 926 if (err) 927 goto err_out; 928 929 if (!o->zone_size) 930 o->zone_size = o->size; 931 932 /* 933 * iolog already set the total io size, if we read back 934 * stored entries. 935 */ 936 if (!o->read_iolog_file) 937 td->total_io_size = o->size * o->loops; 938 939done: 940 if (o->create_only) 941 td->done = 1; 942 943 td_restore_runstate(td, old_state); 944 return 0; 945err_offset: 946 log_err("%s: you need to specify valid offset=\n", o->name); 947err_out: 948 td_restore_runstate(td, old_state); 949 return 1; 950} 951 952int pre_read_files(struct thread_data *td) 953{ 954 struct fio_file *f; 955 unsigned int i; 956 957 dprint(FD_FILE, "pre_read files\n"); 958 959 for_each_file(td, f, i) { 960 pre_read_file(td, f); 961 } 962 963 return 1; 964} 965 966static int __init_rand_distribution(struct thread_data *td, struct fio_file *f) 967{ 968 unsigned int range_size, seed; 969 unsigned long nranges; 970 uint64_t file_size; 971 972 range_size = min(td->o.min_bs[DDIR_READ], td->o.min_bs[DDIR_WRITE]); 973 file_size = min(f->real_file_size, f->io_size); 974 975 nranges = (file_size + range_size - 1) / range_size; 976 977 seed = jhash(f->file_name, strlen(f->file_name), 0) * td->thread_number; 978 if (!td->o.rand_repeatable) 979 seed = td->rand_seeds[4]; 980 981 if (td->o.random_distribution == FIO_RAND_DIST_ZIPF) 982 zipf_init(&f->zipf, nranges, td->o.zipf_theta.u.f, seed); 983 else 984 pareto_init(&f->zipf, nranges, td->o.pareto_h.u.f, seed); 985 986 return 1; 987} 988 989static int init_rand_distribution(struct thread_data *td) 990{ 991 struct fio_file *f; 992 unsigned int i; 993 int state; 994 995 if (td->o.random_distribution == FIO_RAND_DIST_RANDOM) 996 return 0; 997 998 state = td_bump_runstate(td, TD_SETTING_UP); 999 1000 for_each_file(td, f, i) 1001 __init_rand_distribution(td, f); 1002 1003 td_restore_runstate(td, state); 1004 1005 return 1; 1006} 1007 1008int init_random_map(struct thread_data *td) 1009{ 1010 unsigned long long blocks; 1011 struct fio_file *f; 1012 unsigned int i; 1013 1014 if (init_rand_distribution(td)) 1015 return 0; 1016 if (!td_random(td)) 1017 return 0; 1018 1019 for_each_file(td, f, i) { 1020 uint64_t file_size = min(f->real_file_size, f->io_size); 1021 1022 blocks = file_size / (unsigned long long) td->o.rw_min_bs; 1023 1024 if (td->o.random_generator == FIO_RAND_GEN_LFSR) { 1025 unsigned long seed; 1026 1027 seed = td->rand_seeds[FIO_RAND_BLOCK_OFF]; 1028 1029 if (!lfsr_init(&f->lfsr, blocks, seed, 0)) 1030 continue; 1031 } else if (!td->o.norandommap) { 1032 f->io_axmap = axmap_new(blocks); 1033 if (f->io_axmap) 1034 continue; 1035 } else if (td->o.norandommap) 1036 continue; 1037 1038 if (!td->o.softrandommap) { 1039 log_err("fio: failed allocating random map. If running" 1040 " a large number of jobs, try the 'norandommap'" 1041 " option or set 'softrandommap'. Or give" 1042 " a larger --alloc-size to fio.\n"); 1043 return 1; 1044 } 1045 1046 log_info("fio: file %s failed allocating random map. Running " 1047 "job without.\n", f->file_name); 1048 } 1049 1050 return 0; 1051} 1052 1053void close_files(struct thread_data *td) 1054{ 1055 struct fio_file *f; 1056 unsigned int i; 1057 1058 for_each_file(td, f, i) { 1059 if (fio_file_open(f)) 1060 td_io_close_file(td, f); 1061 } 1062} 1063 1064void close_and_free_files(struct thread_data *td) 1065{ 1066 struct fio_file *f; 1067 unsigned int i; 1068 1069 dprint(FD_FILE, "close files\n"); 1070 1071 for_each_file(td, f, i) { 1072 if (fio_file_open(f)) 1073 td_io_close_file(td, f); 1074 1075 remove_file_hash(f); 1076 1077 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) { 1078 dprint(FD_FILE, "free unlink %s\n", f->file_name); 1079 unlink(f->file_name); 1080 } 1081 1082 sfree(f->file_name); 1083 f->file_name = NULL; 1084 axmap_free(f->io_axmap); 1085 f->io_axmap = NULL; 1086 sfree(f); 1087 } 1088 1089 td->o.filename = NULL; 1090 free(td->files); 1091 free(td->file_locks); 1092 td->files_index = 0; 1093 td->files = NULL; 1094 td->file_locks = NULL; 1095 td->o.file_lock_mode = FILE_LOCK_NONE; 1096 td->o.nr_files = 0; 1097} 1098 1099static void get_file_type(struct fio_file *f) 1100{ 1101 struct stat sb; 1102 1103 if (!strcmp(f->file_name, "-")) 1104 f->filetype = FIO_TYPE_PIPE; 1105 else 1106 f->filetype = FIO_TYPE_FILE; 1107 1108 /* \\.\ is the device namespace in Windows, where every file is 1109 * a block device */ 1110 if (strncmp(f->file_name, "\\\\.\\", 4) == 0) 1111 f->filetype = FIO_TYPE_BD; 1112 1113 if (!stat(f->file_name, &sb)) { 1114 if (S_ISBLK(sb.st_mode)) 1115 f->filetype = FIO_TYPE_BD; 1116 else if (S_ISCHR(sb.st_mode)) 1117 f->filetype = FIO_TYPE_CHAR; 1118 else if (S_ISFIFO(sb.st_mode)) 1119 f->filetype = FIO_TYPE_PIPE; 1120 } 1121} 1122 1123static int __is_already_allocated(const char *fname) 1124{ 1125 struct flist_head *entry; 1126 char *filename; 1127 1128 if (flist_empty(&filename_list)) 1129 return 0; 1130 1131 flist_for_each(entry, &filename_list) { 1132 filename = flist_entry(entry, struct file_name, list)->filename; 1133 1134 if (strcmp(filename, fname) == 0) 1135 return 1; 1136 } 1137 1138 return 0; 1139} 1140 1141static int is_already_allocated(const char *fname) 1142{ 1143 int ret; 1144 1145 fio_file_hash_lock(); 1146 ret = __is_already_allocated(fname); 1147 fio_file_hash_unlock(); 1148 return ret; 1149} 1150 1151static void set_already_allocated(const char *fname) 1152{ 1153 struct file_name *fn; 1154 1155 fn = malloc(sizeof(struct file_name)); 1156 fn->filename = strdup(fname); 1157 1158 fio_file_hash_lock(); 1159 if (!__is_already_allocated(fname)) { 1160 flist_add_tail(&fn->list, &filename_list); 1161 fn = NULL; 1162 } 1163 fio_file_hash_unlock(); 1164 1165 if (fn) { 1166 free(fn->filename); 1167 free(fn); 1168 } 1169} 1170 1171 1172static void free_already_allocated(void) 1173{ 1174 struct flist_head *entry, *tmp; 1175 struct file_name *fn; 1176 1177 if (flist_empty(&filename_list)) 1178 return; 1179 1180 fio_file_hash_lock(); 1181 flist_for_each_safe(entry, tmp, &filename_list) { 1182 fn = flist_entry(entry, struct file_name, list); 1183 free(fn->filename); 1184 flist_del(&fn->list); 1185 free(fn); 1186 } 1187 1188 fio_file_hash_unlock(); 1189} 1190 1191static struct fio_file *alloc_new_file(struct thread_data *td) 1192{ 1193 struct fio_file *f; 1194 1195 f = smalloc(sizeof(*f)); 1196 if (!f) { 1197 log_err("fio: smalloc OOM\n"); 1198 assert(0); 1199 return NULL; 1200 } 1201 1202 f->fd = -1; 1203 f->shadow_fd = -1; 1204 fio_file_reset(td, f); 1205 return f; 1206} 1207 1208int add_file(struct thread_data *td, const char *fname, int numjob, int inc) 1209{ 1210 int cur_files = td->files_index; 1211 char file_name[PATH_MAX]; 1212 struct fio_file *f; 1213 int len = 0; 1214 1215 dprint(FD_FILE, "add file %s\n", fname); 1216 1217 if (td->o.directory) 1218 len = set_name_idx(file_name, td->o.directory, numjob); 1219 1220 sprintf(file_name + len, "%s", fname); 1221 1222 /* clean cloned siblings using existing files */ 1223 if (numjob && is_already_allocated(file_name)) 1224 return 0; 1225 1226 f = alloc_new_file(td); 1227 1228 if (td->files_size <= td->files_index) { 1229 unsigned int new_size = td->o.nr_files + 1; 1230 1231 dprint(FD_FILE, "resize file array to %d files\n", new_size); 1232 1233 td->files = realloc(td->files, new_size * sizeof(f)); 1234 if (td->files == NULL) { 1235 log_err("fio: realloc OOM\n"); 1236 assert(0); 1237 } 1238 if (td->o.file_lock_mode != FILE_LOCK_NONE) { 1239 td->file_locks = realloc(td->file_locks, new_size); 1240 if (!td->file_locks) { 1241 log_err("fio: realloc OOM\n"); 1242 assert(0); 1243 } 1244 td->file_locks[cur_files] = FILE_LOCK_NONE; 1245 } 1246 td->files_size = new_size; 1247 } 1248 td->files[cur_files] = f; 1249 f->fileno = cur_files; 1250 1251 /* 1252 * init function, io engine may not be loaded yet 1253 */ 1254 if (td->io_ops && (td->io_ops->flags & FIO_DISKLESSIO)) 1255 f->real_file_size = -1ULL; 1256 1257 f->file_name = smalloc_strdup(file_name); 1258 if (!f->file_name) { 1259 log_err("fio: smalloc OOM\n"); 1260 assert(0); 1261 } 1262 1263 get_file_type(f); 1264 1265 switch (td->o.file_lock_mode) { 1266 case FILE_LOCK_NONE: 1267 break; 1268 case FILE_LOCK_READWRITE: 1269 f->rwlock = fio_rwlock_init(); 1270 break; 1271 case FILE_LOCK_EXCLUSIVE: 1272 f->lock = fio_mutex_init(FIO_MUTEX_UNLOCKED); 1273 break; 1274 default: 1275 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode); 1276 assert(0); 1277 } 1278 1279 td->files_index++; 1280 if (f->filetype == FIO_TYPE_FILE) 1281 td->nr_normal_files++; 1282 1283 set_already_allocated(file_name); 1284 1285 if (inc) 1286 td->o.nr_files++; 1287 1288 dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name, 1289 cur_files); 1290 1291 return cur_files; 1292} 1293 1294int add_file_exclusive(struct thread_data *td, const char *fname) 1295{ 1296 struct fio_file *f; 1297 unsigned int i; 1298 1299 for_each_file(td, f, i) { 1300 if (!strcmp(f->file_name, fname)) 1301 return i; 1302 } 1303 1304 return add_file(td, fname, 0, 1); 1305} 1306 1307void get_file(struct fio_file *f) 1308{ 1309 dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references); 1310 assert(fio_file_open(f)); 1311 f->references++; 1312} 1313 1314int put_file(struct thread_data *td, struct fio_file *f) 1315{ 1316 int f_ret = 0, ret = 0; 1317 1318 dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references); 1319 1320 if (!fio_file_open(f)) { 1321 assert(f->fd == -1); 1322 return 0; 1323 } 1324 1325 assert(f->references); 1326 if (--f->references) 1327 return 0; 1328 1329 if (should_fsync(td) && td->o.fsync_on_close) 1330 f_ret = fsync(f->fd); 1331 1332 if (td->io_ops->close_file) 1333 ret = td->io_ops->close_file(td, f); 1334 1335 if (!ret) 1336 ret = f_ret; 1337 1338 td->nr_open_files--; 1339 fio_file_clear_open(f); 1340 assert(f->fd == -1); 1341 return ret; 1342} 1343 1344void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir) 1345{ 1346 if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE) 1347 return; 1348 1349 if (td->o.file_lock_mode == FILE_LOCK_READWRITE) { 1350 if (ddir == DDIR_READ) 1351 fio_rwlock_read(f->rwlock); 1352 else 1353 fio_rwlock_write(f->rwlock); 1354 } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE) 1355 fio_mutex_down(f->lock); 1356 1357 td->file_locks[f->fileno] = td->o.file_lock_mode; 1358} 1359 1360void unlock_file(struct thread_data *td, struct fio_file *f) 1361{ 1362 if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE) 1363 return; 1364 1365 if (td->o.file_lock_mode == FILE_LOCK_READWRITE) 1366 fio_rwlock_unlock(f->rwlock); 1367 else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE) 1368 fio_mutex_up(f->lock); 1369 1370 td->file_locks[f->fileno] = FILE_LOCK_NONE; 1371} 1372 1373void unlock_file_all(struct thread_data *td, struct fio_file *f) 1374{ 1375 if (td->o.file_lock_mode == FILE_LOCK_NONE || !td->file_locks) 1376 return; 1377 if (td->file_locks[f->fileno] != FILE_LOCK_NONE) 1378 unlock_file(td, f); 1379} 1380 1381static int recurse_dir(struct thread_data *td, const char *dirname) 1382{ 1383 struct dirent *dir; 1384 int ret = 0; 1385 DIR *D; 1386 1387 D = opendir(dirname); 1388 if (!D) { 1389 char buf[FIO_VERROR_SIZE]; 1390 1391 snprintf(buf, FIO_VERROR_SIZE, "opendir(%s)", dirname); 1392 td_verror(td, errno, buf); 1393 return 1; 1394 } 1395 1396 while ((dir = readdir(D)) != NULL) { 1397 char full_path[PATH_MAX]; 1398 struct stat sb; 1399 1400 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, "..")) 1401 continue; 1402 1403 sprintf(full_path, "%s%s%s", dirname, FIO_OS_PATH_SEPARATOR, dir->d_name); 1404 1405 if (lstat(full_path, &sb) == -1) { 1406 if (errno != ENOENT) { 1407 td_verror(td, errno, "stat"); 1408 ret = 1; 1409 break; 1410 } 1411 } 1412 1413 if (S_ISREG(sb.st_mode)) { 1414 add_file(td, full_path, 0, 1); 1415 continue; 1416 } 1417 if (!S_ISDIR(sb.st_mode)) 1418 continue; 1419 1420 ret = recurse_dir(td, full_path); 1421 if (ret) 1422 break; 1423 } 1424 1425 closedir(D); 1426 return ret; 1427} 1428 1429int add_dir_files(struct thread_data *td, const char *path) 1430{ 1431 int ret = recurse_dir(td, path); 1432 1433 if (!ret) 1434 log_info("fio: opendir added %d files\n", td->o.nr_files); 1435 1436 return ret; 1437} 1438 1439void dup_files(struct thread_data *td, struct thread_data *org) 1440{ 1441 struct fio_file *f; 1442 unsigned int i; 1443 1444 dprint(FD_FILE, "dup files: %d\n", org->files_index); 1445 1446 if (!org->files) 1447 return; 1448 1449 td->files = malloc(org->files_index * sizeof(f)); 1450 1451 if (td->o.file_lock_mode != FILE_LOCK_NONE) 1452 td->file_locks = malloc(org->files_index); 1453 1454 for_each_file(org, f, i) { 1455 struct fio_file *__f; 1456 1457 __f = alloc_new_file(td); 1458 1459 if (f->file_name) { 1460 __f->file_name = smalloc_strdup(f->file_name); 1461 if (!__f->file_name) { 1462 log_err("fio: smalloc OOM\n"); 1463 assert(0); 1464 } 1465 1466 __f->filetype = f->filetype; 1467 } 1468 1469 if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE) 1470 __f->lock = f->lock; 1471 else if (td->o.file_lock_mode == FILE_LOCK_READWRITE) 1472 __f->rwlock = f->rwlock; 1473 1474 td->files[i] = __f; 1475 } 1476} 1477 1478/* 1479 * Returns the index that matches the filename, or -1 if not there 1480 */ 1481int get_fileno(struct thread_data *td, const char *fname) 1482{ 1483 struct fio_file *f; 1484 unsigned int i; 1485 1486 for_each_file(td, f, i) 1487 if (!strcmp(f->file_name, fname)) 1488 return i; 1489 1490 return -1; 1491} 1492 1493/* 1494 * For log usage, where we add/open/close files automatically 1495 */ 1496void free_release_files(struct thread_data *td) 1497{ 1498 close_files(td); 1499 td->files_index = 0; 1500 td->nr_normal_files = 0; 1501} 1502 1503void fio_file_reset(struct thread_data *td, struct fio_file *f) 1504{ 1505 f->last_pos = f->file_offset; 1506 f->last_start = -1ULL; 1507 if (f->io_axmap) 1508 axmap_reset(f->io_axmap); 1509 if (td->o.random_generator == FIO_RAND_GEN_LFSR) 1510 lfsr_reset(&f->lfsr, td->rand_seeds[FIO_RAND_BLOCK_OFF]); 1511} 1512 1513int fio_files_done(struct thread_data *td) 1514{ 1515 struct fio_file *f; 1516 unsigned int i; 1517 1518 for_each_file(td, f, i) 1519 if (!fio_file_done(f)) 1520 return 0; 1521 1522 return 1; 1523} 1524 1525/* free memory used in initialization phase only */ 1526void filesetup_mem_free(void) 1527{ 1528 free_already_allocated(); 1529} 1530