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#ifdef WIN32 73 flags |= _O_BINARY; 74#endif 75 76 dprint(FD_FILE, "open file %s, flags %x\n", f->file_name, flags); 77 f->fd = open(f->file_name, flags, 0644); 78 if (f->fd < 0) { 79 td_verror(td, errno, "open"); 80 return 1; 81 } 82 83#ifdef CONFIG_POSIX_FALLOCATE 84 if (!td->o.fill_device) { 85 switch (td->o.fallocate_mode) { 86 case FIO_FALLOCATE_NONE: 87 break; 88 case FIO_FALLOCATE_POSIX: 89 dprint(FD_FILE, "posix_fallocate file %s size %llu\n", 90 f->file_name, 91 (unsigned long long) f->real_file_size); 92 93 r = posix_fallocate(f->fd, 0, f->real_file_size); 94 if (r > 0) { 95 log_err("fio: posix_fallocate fails: %s\n", 96 strerror(r)); 97 } 98 break; 99#ifdef CONFIG_LINUX_FALLOCATE 100 case FIO_FALLOCATE_KEEP_SIZE: 101 dprint(FD_FILE, 102 "fallocate(FALLOC_FL_KEEP_SIZE) " 103 "file %s size %llu\n", f->file_name, 104 (unsigned long long) f->real_file_size); 105 106 r = fallocate(f->fd, FALLOC_FL_KEEP_SIZE, 0, 107 f->real_file_size); 108 if (r != 0) 109 td_verror(td, errno, "fallocate"); 110 111 break; 112#endif /* CONFIG_LINUX_FALLOCATE */ 113 default: 114 log_err("fio: unknown fallocate mode: %d\n", 115 td->o.fallocate_mode); 116 assert(0); 117 } 118 } 119#endif /* CONFIG_POSIX_FALLOCATE */ 120 121 if (!new_layout) 122 goto done; 123 124 /* 125 * The size will be -1ULL when fill_device is used, so don't truncate 126 * or fallocate this file, just write it 127 */ 128 if (!td->o.fill_device) { 129 dprint(FD_FILE, "truncate file %s, size %llu\n", f->file_name, 130 (unsigned long long) f->real_file_size); 131 if (ftruncate(f->fd, f->real_file_size) == -1) { 132 if (errno != EFBIG) { 133 td_verror(td, errno, "ftruncate"); 134 goto err; 135 } 136 } 137 } 138 139 b = malloc(td->o.max_bs[DDIR_WRITE]); 140 141 left = f->real_file_size; 142 while (left && !td->terminate) { 143 bs = td->o.max_bs[DDIR_WRITE]; 144 if (bs > left) 145 bs = left; 146 147 fill_io_buffer(td, b, bs, bs); 148 149 r = write(f->fd, b, bs); 150 151 if (r > 0) { 152 left -= r; 153 continue; 154 } else { 155 if (r < 0) { 156 int __e = errno; 157 158 if (__e == ENOSPC) { 159 if (td->o.fill_device) 160 break; 161 log_info("fio: ENOSPC on laying out " 162 "file, stopping\n"); 163 break; 164 } 165 td_verror(td, errno, "write"); 166 } else 167 td_verror(td, EIO, "write"); 168 169 break; 170 } 171 } 172 173 if (td->terminate) { 174 dprint(FD_FILE, "terminate unlink %s\n", f->file_name); 175 unlink(f->file_name); 176 } else if (td->o.create_fsync) { 177 if (fsync(f->fd) < 0) { 178 td_verror(td, errno, "fsync"); 179 goto err; 180 } 181 } 182 if (td->o.fill_device && !td_write(td)) { 183 fio_file_clear_size_known(f); 184 if (td_io_get_file_size(td, f)) 185 goto err; 186 if (f->io_size > f->real_file_size) 187 f->io_size = f->real_file_size; 188 } 189 190 free(b); 191done: 192 return 0; 193err: 194 close(f->fd); 195 f->fd = -1; 196 if (b) 197 free(b); 198 return 1; 199} 200 201static int pre_read_file(struct thread_data *td, struct fio_file *f) 202{ 203 int ret = 0, r, did_open = 0, old_runstate; 204 unsigned long long left; 205 unsigned int bs; 206 char *b; 207 208 if (td->io_ops->flags & FIO_PIPEIO) 209 return 0; 210 211 if (!fio_file_open(f)) { 212 if (td->io_ops->open_file(td, f)) { 213 log_err("fio: cannot pre-read, failed to open file\n"); 214 return 1; 215 } 216 did_open = 1; 217 } 218 219 old_runstate = td_bump_runstate(td, TD_PRE_READING); 220 221 bs = td->o.max_bs[DDIR_READ]; 222 b = malloc(bs); 223 memset(b, 0, bs); 224 225 if (lseek(f->fd, f->file_offset, SEEK_SET) < 0) { 226 td_verror(td, errno, "lseek"); 227 log_err("fio: failed to lseek pre-read file\n"); 228 ret = 1; 229 goto error; 230 } 231 232 left = f->io_size; 233 234 while (left && !td->terminate) { 235 if (bs > left) 236 bs = left; 237 238 r = read(f->fd, b, bs); 239 240 if (r == (int) bs) { 241 left -= bs; 242 continue; 243 } else { 244 td_verror(td, EIO, "pre_read"); 245 break; 246 } 247 } 248 249error: 250 td_restore_runstate(td, old_runstate); 251 252 if (did_open) 253 td->io_ops->close_file(td, f); 254 255 free(b); 256 return ret; 257} 258 259static unsigned long long get_rand_file_size(struct thread_data *td) 260{ 261 unsigned long long ret, sized; 262 unsigned long r; 263 264 if (td->o.use_os_rand) { 265 r = os_random_long(&td->file_size_state); 266 sized = td->o.file_size_high - td->o.file_size_low; 267 ret = (unsigned long long) ((double) sized * (r / (OS_RAND_MAX + 1.0))); 268 } else { 269 r = __rand(&td->__file_size_state); 270 sized = td->o.file_size_high - td->o.file_size_low; 271 ret = (unsigned long long) ((double) sized * (r / (FRAND_MAX + 1.0))); 272 } 273 274 ret += td->o.file_size_low; 275 ret -= (ret % td->o.rw_min_bs); 276 return ret; 277} 278 279static int file_size(struct thread_data *td, struct fio_file *f) 280{ 281 struct stat st; 282 283 if (stat(f->file_name, &st) == -1) { 284 td_verror(td, errno, "fstat"); 285 return 1; 286 } 287 288 f->real_file_size = st.st_size; 289 return 0; 290} 291 292static int bdev_size(struct thread_data *td, struct fio_file *f) 293{ 294 unsigned long long bytes = 0; 295 int r; 296 297 if (td->io_ops->open_file(td, f)) { 298 log_err("fio: failed opening blockdev %s for size check\n", 299 f->file_name); 300 return 1; 301 } 302 303 r = blockdev_size(f, &bytes); 304 if (r) { 305 td_verror(td, r, "blockdev_size"); 306 goto err; 307 } 308 309 if (!bytes) { 310 log_err("%s: zero sized block device?\n", f->file_name); 311 goto err; 312 } 313 314 f->real_file_size = bytes; 315 td->io_ops->close_file(td, f); 316 return 0; 317err: 318 td->io_ops->close_file(td, f); 319 return 1; 320} 321 322static int char_size(struct thread_data *td, struct fio_file *f) 323{ 324#ifdef FIO_HAVE_CHARDEV_SIZE 325 unsigned long long bytes = 0; 326 int r; 327 328 if (td->io_ops->open_file(td, f)) { 329 log_err("fio: failed opening blockdev %s for size check\n", 330 f->file_name); 331 return 1; 332 } 333 334 r = chardev_size(f, &bytes); 335 if (r) { 336 td_verror(td, r, "chardev_size"); 337 goto err; 338 } 339 340 if (!bytes) { 341 log_err("%s: zero sized char device?\n", f->file_name); 342 goto err; 343 } 344 345 f->real_file_size = bytes; 346 td->io_ops->close_file(td, f); 347 return 0; 348err: 349 td->io_ops->close_file(td, f); 350 return 1; 351#else 352 f->real_file_size = -1ULL; 353 return 0; 354#endif 355} 356 357static int get_file_size(struct thread_data *td, struct fio_file *f) 358{ 359 int ret = 0; 360 361 if (fio_file_size_known(f)) 362 return 0; 363 364 if (f->filetype == FIO_TYPE_FILE) 365 ret = file_size(td, f); 366 else if (f->filetype == FIO_TYPE_BD) 367 ret = bdev_size(td, f); 368 else if (f->filetype == FIO_TYPE_CHAR) 369 ret = char_size(td, f); 370 else 371 f->real_file_size = -1; 372 373 if (ret) 374 return ret; 375 376 if (f->file_offset > f->real_file_size) { 377 log_err("%s: offset extends end (%llu > %llu)\n", td->o.name, 378 (unsigned long long) f->file_offset, 379 (unsigned long long) f->real_file_size); 380 return 1; 381 } 382 383 fio_file_set_size_known(f); 384 return 0; 385} 386 387static int __file_invalidate_cache(struct thread_data *td, struct fio_file *f, 388 unsigned long long off, 389 unsigned long long len) 390{ 391 int ret = 0; 392 393 if (len == -1ULL) 394 len = f->io_size; 395 if (off == -1ULL) 396 off = f->file_offset; 397 398 if (len == -1ULL || off == -1ULL) 399 return 0; 400 401 dprint(FD_IO, "invalidate cache %s: %llu/%llu\n", f->file_name, off, 402 len); 403 404 if (f->mmap_ptr) { 405 ret = posix_madvise(f->mmap_ptr, f->mmap_sz, POSIX_MADV_DONTNEED); 406#ifdef FIO_MADV_FREE 407 if (f->filetype == FIO_TYPE_BD) 408 (void) posix_madvise(f->mmap_ptr, f->mmap_sz, FIO_MADV_FREE); 409#endif 410 } else if (f->filetype == FIO_TYPE_FILE) { 411 ret = posix_fadvise(f->fd, off, len, POSIX_FADV_DONTNEED); 412 } else if (f->filetype == FIO_TYPE_BD) { 413 ret = blockdev_invalidate_cache(f); 414 if (ret < 0 && errno == EACCES && geteuid()) { 415 if (!root_warn) { 416 log_err("fio: only root may flush block " 417 "devices. Cache flush bypassed!\n"); 418 root_warn = 1; 419 } 420 ret = 0; 421 } 422 } else if (f->filetype == FIO_TYPE_CHAR || f->filetype == FIO_TYPE_PIPE) 423 ret = 0; 424 425 /* 426 * Cache flushing isn't a fatal condition, and we know it will 427 * happen on some platforms where we don't have the proper 428 * function to flush eg block device caches. So just warn and 429 * continue on our way. 430 */ 431 if (ret) { 432 log_info("fio: cache invalidation of %s failed: %s\n", f->file_name, strerror(errno)); 433 ret = 0; 434 } 435 436 return 0; 437 438} 439 440int file_invalidate_cache(struct thread_data *td, struct fio_file *f) 441{ 442 if (!fio_file_open(f)) 443 return 0; 444 445 return __file_invalidate_cache(td, f, -1ULL, -1ULL); 446} 447 448int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f) 449{ 450 int ret = 0; 451 452 dprint(FD_FILE, "fd close %s\n", f->file_name); 453 454 remove_file_hash(f); 455 456 if (close(f->fd) < 0) 457 ret = errno; 458 459 f->fd = -1; 460 461 if (f->shadow_fd != -1) { 462 close(f->shadow_fd); 463 f->shadow_fd = -1; 464 } 465 466 f->engine_data = 0; 467 return ret; 468} 469 470int file_lookup_open(struct fio_file *f, int flags) 471{ 472 struct fio_file *__f; 473 int from_hash; 474 475 __f = lookup_file_hash(f->file_name); 476 if (__f) { 477 dprint(FD_FILE, "found file in hash %s\n", f->file_name); 478 /* 479 * racy, need the __f->lock locked 480 */ 481 f->lock = __f->lock; 482 from_hash = 1; 483 } else { 484 dprint(FD_FILE, "file not found in hash %s\n", f->file_name); 485 from_hash = 0; 486 } 487 488#ifdef WIN32 489 flags |= _O_BINARY; 490#endif 491 492 f->fd = open(f->file_name, flags, 0600); 493 return from_hash; 494} 495 496static int file_close_shadow_fds(struct thread_data *td) 497{ 498 struct fio_file *f; 499 int num_closed = 0; 500 unsigned int i; 501 502 for_each_file(td, f, i) { 503 if (f->shadow_fd == -1) 504 continue; 505 506 close(f->shadow_fd); 507 f->shadow_fd = -1; 508 num_closed++; 509 } 510 511 return num_closed; 512} 513 514int generic_open_file(struct thread_data *td, struct fio_file *f) 515{ 516 int is_std = 0; 517 int flags = 0; 518 int from_hash = 0; 519 520 dprint(FD_FILE, "fd open %s\n", f->file_name); 521 522 if (td_trim(td) && f->filetype != FIO_TYPE_BD) { 523 log_err("fio: trim only applies to block device\n"); 524 return 1; 525 } 526 527 if (!strcmp(f->file_name, "-")) { 528 if (td_rw(td)) { 529 log_err("fio: can't read/write to stdin/out\n"); 530 return 1; 531 } 532 is_std = 1; 533 534 /* 535 * move output logging to stderr, if we are writing to stdout 536 */ 537 if (td_write(td)) 538 f_out = stderr; 539 } 540 541 if (td_trim(td)) 542 goto skip_flags; 543 if (td->o.odirect) 544 flags |= OS_O_DIRECT; 545 if (td->o.oatomic) { 546 if (!FIO_O_ATOMIC) { 547 td_verror(td, EINVAL, "OS does not support atomic IO"); 548 return 1; 549 } 550 flags |= OS_O_DIRECT | FIO_O_ATOMIC; 551 } 552 if (td->o.sync_io) 553 flags |= O_SYNC; 554 if (td->o.create_on_open) 555 flags |= O_CREAT; 556skip_flags: 557 if (f->filetype != FIO_TYPE_FILE) 558 flags |= FIO_O_NOATIME; 559 560open_again: 561 if (td_write(td)) { 562 if (!read_only) 563 flags |= O_RDWR; 564 565 if (f->filetype == FIO_TYPE_FILE) 566 flags |= O_CREAT; 567 568 if (is_std) 569 f->fd = dup(STDOUT_FILENO); 570 else 571 from_hash = file_lookup_open(f, flags); 572 } else if (td_read(td)) { 573 if (f->filetype == FIO_TYPE_CHAR && !read_only) 574 flags |= O_RDWR; 575 else 576 flags |= O_RDONLY; 577 578 if (is_std) 579 f->fd = dup(STDIN_FILENO); 580 else 581 from_hash = file_lookup_open(f, flags); 582 } else { //td trim 583 flags |= O_RDWR; 584 from_hash = file_lookup_open(f, flags); 585 } 586 587 if (f->fd == -1) { 588 char buf[FIO_VERROR_SIZE]; 589 int __e = errno; 590 591 if (__e == EPERM && (flags & FIO_O_NOATIME)) { 592 flags &= ~FIO_O_NOATIME; 593 goto open_again; 594 } 595 if (__e == EMFILE && file_close_shadow_fds(td)) 596 goto open_again; 597 598 snprintf(buf, sizeof(buf), "open(%s)", f->file_name); 599 600 if (__e == EINVAL && (flags & OS_O_DIRECT)) { 601 log_err("fio: looks like your file system does not " \ 602 "support direct=1/buffered=0\n"); 603 } 604 605 td_verror(td, __e, buf); 606 } 607 608 if (!from_hash && f->fd != -1) { 609 if (add_file_hash(f)) { 610 int fio_unused ret; 611 612 /* 613 * Stash away descriptor for later close. This is to 614 * work-around a "feature" on Linux, where a close of 615 * an fd that has been opened for write will trigger 616 * udev to call blkid to check partitions, fs id, etc. 617 * That pollutes the device cache, which can slow down 618 * unbuffered accesses. 619 */ 620 if (f->shadow_fd == -1) 621 f->shadow_fd = f->fd; 622 else { 623 /* 624 * OK to ignore, we haven't done anything 625 * with it 626 */ 627 ret = generic_close_file(td, f); 628 } 629 goto open_again; 630 } 631 } 632 633 return 0; 634} 635 636int generic_get_file_size(struct thread_data *td, struct fio_file *f) 637{ 638 return get_file_size(td, f); 639} 640 641/* 642 * open/close all files, so that ->real_file_size gets set 643 */ 644static int get_file_sizes(struct thread_data *td) 645{ 646 struct fio_file *f; 647 unsigned int i; 648 int err = 0; 649 650 for_each_file(td, f, i) { 651 dprint(FD_FILE, "get file size for %p/%d/%p\n", f, i, 652 f->file_name); 653 654 if (td_io_get_file_size(td, f)) { 655 if (td->error != ENOENT) { 656 log_err("%s\n", td->verror); 657 err = 1; 658 } 659 clear_error(td); 660 } 661 662 if (f->real_file_size == -1ULL && td->o.size) 663 f->real_file_size = td->o.size / td->o.nr_files; 664 } 665 666 return err; 667} 668 669struct fio_mount { 670 struct flist_head list; 671 const char *base; 672 char __base[256]; 673 unsigned int key; 674}; 675 676/* 677 * Get free number of bytes for each file on each unique mount. 678 */ 679static unsigned long long get_fs_free_counts(struct thread_data *td) 680{ 681 struct flist_head *n, *tmp; 682 unsigned long long ret = 0; 683 struct fio_mount *fm; 684 FLIST_HEAD(list); 685 struct fio_file *f; 686 unsigned int i; 687 688 for_each_file(td, f, i) { 689 struct stat sb; 690 char buf[256]; 691 692 if (f->filetype == FIO_TYPE_BD || f->filetype == FIO_TYPE_CHAR) { 693 if (f->real_file_size != -1ULL) 694 ret += f->real_file_size; 695 continue; 696 } else if (f->filetype != FIO_TYPE_FILE) 697 continue; 698 699 buf[255] = '\0'; 700 strncpy(buf, f->file_name, 255); 701 702 if (stat(buf, &sb) < 0) { 703 if (errno != ENOENT) 704 break; 705 strcpy(buf, "."); 706 if (stat(buf, &sb) < 0) 707 break; 708 } 709 710 fm = NULL; 711 flist_for_each(n, &list) { 712 fm = flist_entry(n, struct fio_mount, list); 713 if (fm->key == sb.st_dev) 714 break; 715 716 fm = NULL; 717 } 718 719 if (fm) 720 continue; 721 722 fm = calloc(1, sizeof(*fm)); 723 strncpy(fm->__base, buf, sizeof(fm->__base) - 1); 724 fm->base = basename(fm->__base); 725 fm->key = sb.st_dev; 726 flist_add(&fm->list, &list); 727 } 728 729 flist_for_each_safe(n, tmp, &list) { 730 unsigned long long sz; 731 732 fm = flist_entry(n, struct fio_mount, list); 733 flist_del(&fm->list); 734 735 sz = get_fs_size(fm->base); 736 if (sz && sz != -1ULL) 737 ret += sz; 738 739 free(fm); 740 } 741 742 return ret; 743} 744 745uint64_t get_start_offset(struct thread_data *td, struct fio_file *f) 746{ 747 struct thread_options *o = &td->o; 748 749 if (o->file_append && f->filetype == FIO_TYPE_FILE) 750 return f->real_file_size; 751 752 return td->o.start_offset + 753 (td->thread_number - 1) * td->o.offset_increment; 754} 755 756/* 757 * Open the files and setup files sizes, creating files if necessary. 758 */ 759int setup_files(struct thread_data *td) 760{ 761 unsigned long long total_size, extend_size; 762 struct thread_options *o = &td->o; 763 struct fio_file *f; 764 unsigned int i, nr_fs_extra = 0; 765 int err = 0, need_extend; 766 int old_state; 767 const unsigned int bs = td_min_bs(td); 768 uint64_t fs = 0; 769 770 dprint(FD_FILE, "setup files\n"); 771 772 old_state = td_bump_runstate(td, TD_SETTING_UP); 773 774 if (o->read_iolog_file) 775 goto done; 776 777 /* 778 * if ioengine defines a setup() method, it's responsible for 779 * opening the files and setting f->real_file_size to indicate 780 * the valid range for that file. 781 */ 782 if (td->io_ops->setup) 783 err = td->io_ops->setup(td); 784 else 785 err = get_file_sizes(td); 786 787 if (err) 788 goto err_out; 789 790 /* 791 * check sizes. if the files/devices do not exist and the size 792 * isn't passed to fio, abort. 793 */ 794 total_size = 0; 795 for_each_file(td, f, i) { 796 if (f->real_file_size == -1ULL) 797 total_size = -1ULL; 798 else 799 total_size += f->real_file_size; 800 } 801 802 if (o->fill_device) 803 td->fill_device_size = get_fs_free_counts(td); 804 805 /* 806 * device/file sizes are zero and no size given, punt 807 */ 808 if ((!total_size || total_size == -1ULL) && !o->size && 809 !(td->io_ops->flags & FIO_NOIO) && !o->fill_device && 810 !(o->nr_files && (o->file_size_low || o->file_size_high))) { 811 log_err("%s: you need to specify size=\n", o->name); 812 td_verror(td, EINVAL, "total_file_size"); 813 goto err_out; 814 } 815 816 /* 817 * Calculate per-file size and potential extra size for the 818 * first files, if needed. 819 */ 820 if (!o->file_size_low && o->nr_files) { 821 uint64_t all_fs; 822 823 fs = o->size / o->nr_files; 824 all_fs = fs * o->nr_files; 825 826 if (all_fs < o->size) 827 nr_fs_extra = (o->size - all_fs) / bs; 828 } 829 830 /* 831 * now file sizes are known, so we can set ->io_size. if size= is 832 * not given, ->io_size is just equal to ->real_file_size. if size 833 * is given, ->io_size is size / nr_files. 834 */ 835 extend_size = total_size = 0; 836 need_extend = 0; 837 for_each_file(td, f, i) { 838 f->file_offset = get_start_offset(td, f); 839 840 if (!o->file_size_low) { 841 /* 842 * no file size range given, file size is equal to 843 * total size divided by number of files. If that is 844 * zero, set it to the real file size. If the size 845 * doesn't divide nicely with the min blocksize, 846 * make the first files bigger. 847 */ 848 f->io_size = fs; 849 if (nr_fs_extra) { 850 nr_fs_extra--; 851 f->io_size += bs; 852 } 853 854 if (!f->io_size) 855 f->io_size = f->real_file_size - f->file_offset; 856 } else if (f->real_file_size < o->file_size_low || 857 f->real_file_size > o->file_size_high) { 858 if (f->file_offset > o->file_size_low) 859 goto err_offset; 860 /* 861 * file size given. if it's fixed, use that. if it's a 862 * range, generate a random size in-between. 863 */ 864 if (o->file_size_low == o->file_size_high) 865 f->io_size = o->file_size_low - f->file_offset; 866 else { 867 f->io_size = get_rand_file_size(td) 868 - f->file_offset; 869 } 870 } else 871 f->io_size = f->real_file_size - f->file_offset; 872 873 if (f->io_size == -1ULL) 874 total_size = -1ULL; 875 else { 876 if (o->size_percent) 877 f->io_size = (f->io_size * o->size_percent) / 100; 878 total_size += f->io_size; 879 } 880 881 if (f->filetype == FIO_TYPE_FILE && 882 (f->io_size + f->file_offset) > f->real_file_size && 883 !(td->io_ops->flags & FIO_DISKLESSIO)) { 884 if (!o->create_on_open) { 885 need_extend++; 886 extend_size += (f->io_size + f->file_offset); 887 } else 888 f->real_file_size = f->io_size + f->file_offset; 889 fio_file_set_extend(f); 890 } 891 } 892 893 if (!o->size || o->size > total_size) 894 o->size = total_size; 895 896 if (o->size < td_min_bs(td)) { 897 log_err("fio: blocksize too large for data set\n"); 898 goto err_out; 899 } 900 901 /* 902 * See if we need to extend some files 903 */ 904 if (need_extend) { 905 temp_stall_ts = 1; 906 if (output_format == FIO_OUTPUT_NORMAL) 907 log_info("%s: Laying out IO file(s) (%u file(s) /" 908 " %lluMB)\n", o->name, need_extend, 909 extend_size >> 20); 910 911 for_each_file(td, f, i) { 912 unsigned long long old_len = -1ULL, extend_len = -1ULL; 913 914 if (!fio_file_extend(f)) 915 continue; 916 917 assert(f->filetype == FIO_TYPE_FILE); 918 fio_file_clear_extend(f); 919 if (!o->fill_device) { 920 old_len = f->real_file_size; 921 extend_len = f->io_size + f->file_offset - 922 old_len; 923 } 924 f->real_file_size = (f->io_size + f->file_offset); 925 err = extend_file(td, f); 926 if (err) 927 break; 928 929 err = __file_invalidate_cache(td, f, old_len, 930 extend_len); 931 932 /* 933 * Shut up static checker 934 */ 935 if (f->fd != -1) 936 close(f->fd); 937 938 f->fd = -1; 939 if (err) 940 break; 941 } 942 temp_stall_ts = 0; 943 } 944 945 if (err) 946 goto err_out; 947 948 if (!o->zone_size) 949 o->zone_size = o->size; 950 951 /* 952 * iolog already set the total io size, if we read back 953 * stored entries. 954 */ 955 if (!o->read_iolog_file) { 956 if (o->io_limit) 957 td->total_io_size = o->io_limit * o->loops; 958 else 959 td->total_io_size = o->size * o->loops; 960 } 961 962done: 963 if (o->create_only) 964 td->done = 1; 965 966 td_restore_runstate(td, old_state); 967 return 0; 968err_offset: 969 log_err("%s: you need to specify valid offset=\n", o->name); 970err_out: 971 td_restore_runstate(td, old_state); 972 return 1; 973} 974 975int pre_read_files(struct thread_data *td) 976{ 977 struct fio_file *f; 978 unsigned int i; 979 980 dprint(FD_FILE, "pre_read files\n"); 981 982 for_each_file(td, f, i) { 983 pre_read_file(td, f); 984 } 985 986 return 1; 987} 988 989static int __init_rand_distribution(struct thread_data *td, struct fio_file *f) 990{ 991 unsigned int range_size, seed; 992 unsigned long nranges; 993 uint64_t file_size; 994 995 range_size = min(td->o.min_bs[DDIR_READ], td->o.min_bs[DDIR_WRITE]); 996 file_size = min(f->real_file_size, f->io_size); 997 998 nranges = (file_size + range_size - 1) / range_size; 999 1000 seed = jhash(f->file_name, strlen(f->file_name), 0) * td->thread_number; 1001 if (!td->o.rand_repeatable) 1002 seed = td->rand_seeds[4]; 1003 1004 if (td->o.random_distribution == FIO_RAND_DIST_ZIPF) 1005 zipf_init(&f->zipf, nranges, td->o.zipf_theta.u.f, seed); 1006 else 1007 pareto_init(&f->zipf, nranges, td->o.pareto_h.u.f, seed); 1008 1009 return 1; 1010} 1011 1012static int init_rand_distribution(struct thread_data *td) 1013{ 1014 struct fio_file *f; 1015 unsigned int i; 1016 int state; 1017 1018 if (td->o.random_distribution == FIO_RAND_DIST_RANDOM) 1019 return 0; 1020 1021 state = td_bump_runstate(td, TD_SETTING_UP); 1022 1023 for_each_file(td, f, i) 1024 __init_rand_distribution(td, f); 1025 1026 td_restore_runstate(td, state); 1027 1028 return 1; 1029} 1030 1031int init_random_map(struct thread_data *td) 1032{ 1033 unsigned long long blocks; 1034 struct fio_file *f; 1035 unsigned int i; 1036 1037 if (init_rand_distribution(td)) 1038 return 0; 1039 if (!td_random(td)) 1040 return 0; 1041 1042 for_each_file(td, f, i) { 1043 uint64_t file_size = min(f->real_file_size, f->io_size); 1044 1045 blocks = file_size / (unsigned long long) td->o.rw_min_bs; 1046 1047 if (td->o.random_generator == FIO_RAND_GEN_LFSR) { 1048 unsigned long seed; 1049 1050 seed = td->rand_seeds[FIO_RAND_BLOCK_OFF]; 1051 1052 if (!lfsr_init(&f->lfsr, blocks, seed, 0)) 1053 continue; 1054 } else if (!td->o.norandommap) { 1055 f->io_axmap = axmap_new(blocks); 1056 if (f->io_axmap) 1057 continue; 1058 } else if (td->o.norandommap) 1059 continue; 1060 1061 if (!td->o.softrandommap) { 1062 log_err("fio: failed allocating random map. If running" 1063 " a large number of jobs, try the 'norandommap'" 1064 " option or set 'softrandommap'. Or give" 1065 " a larger --alloc-size to fio.\n"); 1066 return 1; 1067 } 1068 1069 log_info("fio: file %s failed allocating random map. Running " 1070 "job without.\n", f->file_name); 1071 } 1072 1073 return 0; 1074} 1075 1076void close_files(struct thread_data *td) 1077{ 1078 struct fio_file *f; 1079 unsigned int i; 1080 1081 for_each_file(td, f, i) { 1082 if (fio_file_open(f)) 1083 td_io_close_file(td, f); 1084 } 1085} 1086 1087void close_and_free_files(struct thread_data *td) 1088{ 1089 struct fio_file *f; 1090 unsigned int i; 1091 1092 dprint(FD_FILE, "close files\n"); 1093 1094 for_each_file(td, f, i) { 1095 if (fio_file_open(f)) 1096 td_io_close_file(td, f); 1097 1098 remove_file_hash(f); 1099 1100 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) { 1101 dprint(FD_FILE, "free unlink %s\n", f->file_name); 1102 unlink(f->file_name); 1103 } 1104 1105 sfree(f->file_name); 1106 f->file_name = NULL; 1107 axmap_free(f->io_axmap); 1108 f->io_axmap = NULL; 1109 sfree(f); 1110 } 1111 1112 td->o.filename = NULL; 1113 free(td->files); 1114 free(td->file_locks); 1115 td->files_index = 0; 1116 td->files = NULL; 1117 td->file_locks = NULL; 1118 td->o.file_lock_mode = FILE_LOCK_NONE; 1119 td->o.nr_files = 0; 1120} 1121 1122static void get_file_type(struct fio_file *f) 1123{ 1124 struct stat sb; 1125 1126 if (!strcmp(f->file_name, "-")) 1127 f->filetype = FIO_TYPE_PIPE; 1128 else 1129 f->filetype = FIO_TYPE_FILE; 1130 1131 /* \\.\ is the device namespace in Windows, where every file is 1132 * a block device */ 1133 if (strncmp(f->file_name, "\\\\.\\", 4) == 0) 1134 f->filetype = FIO_TYPE_BD; 1135 1136 if (!stat(f->file_name, &sb)) { 1137 if (S_ISBLK(sb.st_mode)) 1138 f->filetype = FIO_TYPE_BD; 1139 else if (S_ISCHR(sb.st_mode)) 1140 f->filetype = FIO_TYPE_CHAR; 1141 else if (S_ISFIFO(sb.st_mode)) 1142 f->filetype = FIO_TYPE_PIPE; 1143 } 1144} 1145 1146static int __is_already_allocated(const char *fname) 1147{ 1148 struct flist_head *entry; 1149 char *filename; 1150 1151 if (flist_empty(&filename_list)) 1152 return 0; 1153 1154 flist_for_each(entry, &filename_list) { 1155 filename = flist_entry(entry, struct file_name, list)->filename; 1156 1157 if (strcmp(filename, fname) == 0) 1158 return 1; 1159 } 1160 1161 return 0; 1162} 1163 1164static int is_already_allocated(const char *fname) 1165{ 1166 int ret; 1167 1168 fio_file_hash_lock(); 1169 ret = __is_already_allocated(fname); 1170 fio_file_hash_unlock(); 1171 return ret; 1172} 1173 1174static void set_already_allocated(const char *fname) 1175{ 1176 struct file_name *fn; 1177 1178 fn = malloc(sizeof(struct file_name)); 1179 fn->filename = strdup(fname); 1180 1181 fio_file_hash_lock(); 1182 if (!__is_already_allocated(fname)) { 1183 flist_add_tail(&fn->list, &filename_list); 1184 fn = NULL; 1185 } 1186 fio_file_hash_unlock(); 1187 1188 if (fn) { 1189 free(fn->filename); 1190 free(fn); 1191 } 1192} 1193 1194 1195static void free_already_allocated(void) 1196{ 1197 struct flist_head *entry, *tmp; 1198 struct file_name *fn; 1199 1200 if (flist_empty(&filename_list)) 1201 return; 1202 1203 fio_file_hash_lock(); 1204 flist_for_each_safe(entry, tmp, &filename_list) { 1205 fn = flist_entry(entry, struct file_name, list); 1206 free(fn->filename); 1207 flist_del(&fn->list); 1208 free(fn); 1209 } 1210 1211 fio_file_hash_unlock(); 1212} 1213 1214static struct fio_file *alloc_new_file(struct thread_data *td) 1215{ 1216 struct fio_file *f; 1217 1218 f = smalloc(sizeof(*f)); 1219 if (!f) { 1220 log_err("fio: smalloc OOM\n"); 1221 assert(0); 1222 return NULL; 1223 } 1224 1225 f->fd = -1; 1226 f->shadow_fd = -1; 1227 fio_file_reset(td, f); 1228 return f; 1229} 1230 1231int add_file(struct thread_data *td, const char *fname, int numjob, int inc) 1232{ 1233 int cur_files = td->files_index; 1234 char file_name[PATH_MAX]; 1235 struct fio_file *f; 1236 int len = 0; 1237 1238 dprint(FD_FILE, "add file %s\n", fname); 1239 1240 if (td->o.directory) 1241 len = set_name_idx(file_name, td->o.directory, numjob); 1242 1243 sprintf(file_name + len, "%s", fname); 1244 1245 /* clean cloned siblings using existing files */ 1246 if (numjob && is_already_allocated(file_name)) 1247 return 0; 1248 1249 f = alloc_new_file(td); 1250 1251 if (td->files_size <= td->files_index) { 1252 unsigned int new_size = td->o.nr_files + 1; 1253 1254 dprint(FD_FILE, "resize file array to %d files\n", new_size); 1255 1256 td->files = realloc(td->files, new_size * sizeof(f)); 1257 if (td->files == NULL) { 1258 log_err("fio: realloc OOM\n"); 1259 assert(0); 1260 } 1261 if (td->o.file_lock_mode != FILE_LOCK_NONE) { 1262 td->file_locks = realloc(td->file_locks, new_size); 1263 if (!td->file_locks) { 1264 log_err("fio: realloc OOM\n"); 1265 assert(0); 1266 } 1267 td->file_locks[cur_files] = FILE_LOCK_NONE; 1268 } 1269 td->files_size = new_size; 1270 } 1271 td->files[cur_files] = f; 1272 f->fileno = cur_files; 1273 1274 /* 1275 * init function, io engine may not be loaded yet 1276 */ 1277 if (td->io_ops && (td->io_ops->flags & FIO_DISKLESSIO)) 1278 f->real_file_size = -1ULL; 1279 1280 f->file_name = smalloc_strdup(file_name); 1281 if (!f->file_name) { 1282 log_err("fio: smalloc OOM\n"); 1283 assert(0); 1284 } 1285 1286 get_file_type(f); 1287 1288 switch (td->o.file_lock_mode) { 1289 case FILE_LOCK_NONE: 1290 break; 1291 case FILE_LOCK_READWRITE: 1292 f->rwlock = fio_rwlock_init(); 1293 break; 1294 case FILE_LOCK_EXCLUSIVE: 1295 f->lock = fio_mutex_init(FIO_MUTEX_UNLOCKED); 1296 break; 1297 default: 1298 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode); 1299 assert(0); 1300 } 1301 1302 td->files_index++; 1303 if (f->filetype == FIO_TYPE_FILE) 1304 td->nr_normal_files++; 1305 1306 set_already_allocated(file_name); 1307 1308 if (inc) 1309 td->o.nr_files++; 1310 1311 dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name, 1312 cur_files); 1313 1314 return cur_files; 1315} 1316 1317int add_file_exclusive(struct thread_data *td, const char *fname) 1318{ 1319 struct fio_file *f; 1320 unsigned int i; 1321 1322 for_each_file(td, f, i) { 1323 if (!strcmp(f->file_name, fname)) 1324 return i; 1325 } 1326 1327 return add_file(td, fname, 0, 1); 1328} 1329 1330void get_file(struct fio_file *f) 1331{ 1332 dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references); 1333 assert(fio_file_open(f)); 1334 f->references++; 1335} 1336 1337int put_file(struct thread_data *td, struct fio_file *f) 1338{ 1339 int f_ret = 0, ret = 0; 1340 1341 dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references); 1342 1343 if (!fio_file_open(f)) { 1344 assert(f->fd == -1); 1345 return 0; 1346 } 1347 1348 assert(f->references); 1349 if (--f->references) 1350 return 0; 1351 1352 if (should_fsync(td) && td->o.fsync_on_close) { 1353 f_ret = fsync(f->fd); 1354 if (f_ret < 0) 1355 f_ret = errno; 1356 } 1357 1358 if (td->io_ops->close_file) 1359 ret = td->io_ops->close_file(td, f); 1360 1361 if (!ret) 1362 ret = f_ret; 1363 1364 td->nr_open_files--; 1365 fio_file_clear_open(f); 1366 assert(f->fd == -1); 1367 return ret; 1368} 1369 1370void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir) 1371{ 1372 if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE) 1373 return; 1374 1375 if (td->o.file_lock_mode == FILE_LOCK_READWRITE) { 1376 if (ddir == DDIR_READ) 1377 fio_rwlock_read(f->rwlock); 1378 else 1379 fio_rwlock_write(f->rwlock); 1380 } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE) 1381 fio_mutex_down(f->lock); 1382 1383 td->file_locks[f->fileno] = td->o.file_lock_mode; 1384} 1385 1386void unlock_file(struct thread_data *td, struct fio_file *f) 1387{ 1388 if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE) 1389 return; 1390 1391 if (td->o.file_lock_mode == FILE_LOCK_READWRITE) 1392 fio_rwlock_unlock(f->rwlock); 1393 else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE) 1394 fio_mutex_up(f->lock); 1395 1396 td->file_locks[f->fileno] = FILE_LOCK_NONE; 1397} 1398 1399void unlock_file_all(struct thread_data *td, struct fio_file *f) 1400{ 1401 if (td->o.file_lock_mode == FILE_LOCK_NONE || !td->file_locks) 1402 return; 1403 if (td->file_locks[f->fileno] != FILE_LOCK_NONE) 1404 unlock_file(td, f); 1405} 1406 1407static int recurse_dir(struct thread_data *td, const char *dirname) 1408{ 1409 struct dirent *dir; 1410 int ret = 0; 1411 DIR *D; 1412 1413 D = opendir(dirname); 1414 if (!D) { 1415 char buf[FIO_VERROR_SIZE]; 1416 1417 snprintf(buf, FIO_VERROR_SIZE, "opendir(%s)", dirname); 1418 td_verror(td, errno, buf); 1419 return 1; 1420 } 1421 1422 while ((dir = readdir(D)) != NULL) { 1423 char full_path[PATH_MAX]; 1424 struct stat sb; 1425 1426 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, "..")) 1427 continue; 1428 1429 sprintf(full_path, "%s%s%s", dirname, FIO_OS_PATH_SEPARATOR, dir->d_name); 1430 1431 if (lstat(full_path, &sb) == -1) { 1432 if (errno != ENOENT) { 1433 td_verror(td, errno, "stat"); 1434 ret = 1; 1435 break; 1436 } 1437 } 1438 1439 if (S_ISREG(sb.st_mode)) { 1440 add_file(td, full_path, 0, 1); 1441 continue; 1442 } 1443 if (!S_ISDIR(sb.st_mode)) 1444 continue; 1445 1446 ret = recurse_dir(td, full_path); 1447 if (ret) 1448 break; 1449 } 1450 1451 closedir(D); 1452 return ret; 1453} 1454 1455int add_dir_files(struct thread_data *td, const char *path) 1456{ 1457 int ret = recurse_dir(td, path); 1458 1459 if (!ret) 1460 log_info("fio: opendir added %d files\n", td->o.nr_files); 1461 1462 return ret; 1463} 1464 1465void dup_files(struct thread_data *td, struct thread_data *org) 1466{ 1467 struct fio_file *f; 1468 unsigned int i; 1469 1470 dprint(FD_FILE, "dup files: %d\n", org->files_index); 1471 1472 if (!org->files) 1473 return; 1474 1475 td->files = malloc(org->files_index * sizeof(f)); 1476 1477 if (td->o.file_lock_mode != FILE_LOCK_NONE) 1478 td->file_locks = malloc(org->files_index); 1479 1480 for_each_file(org, f, i) { 1481 struct fio_file *__f; 1482 1483 __f = alloc_new_file(td); 1484 1485 if (f->file_name) { 1486 __f->file_name = smalloc_strdup(f->file_name); 1487 if (!__f->file_name) { 1488 log_err("fio: smalloc OOM\n"); 1489 assert(0); 1490 } 1491 1492 __f->filetype = f->filetype; 1493 } 1494 1495 if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE) 1496 __f->lock = f->lock; 1497 else if (td->o.file_lock_mode == FILE_LOCK_READWRITE) 1498 __f->rwlock = f->rwlock; 1499 1500 td->files[i] = __f; 1501 } 1502} 1503 1504/* 1505 * Returns the index that matches the filename, or -1 if not there 1506 */ 1507int get_fileno(struct thread_data *td, const char *fname) 1508{ 1509 struct fio_file *f; 1510 unsigned int i; 1511 1512 for_each_file(td, f, i) 1513 if (!strcmp(f->file_name, fname)) 1514 return i; 1515 1516 return -1; 1517} 1518 1519/* 1520 * For log usage, where we add/open/close files automatically 1521 */ 1522void free_release_files(struct thread_data *td) 1523{ 1524 close_files(td); 1525 td->files_index = 0; 1526 td->nr_normal_files = 0; 1527} 1528 1529void fio_file_reset(struct thread_data *td, struct fio_file *f) 1530{ 1531 f->last_pos = f->file_offset; 1532 f->last_start = -1ULL; 1533 if (f->io_axmap) 1534 axmap_reset(f->io_axmap); 1535 if (td->o.random_generator == FIO_RAND_GEN_LFSR) 1536 lfsr_reset(&f->lfsr, td->rand_seeds[FIO_RAND_BLOCK_OFF]); 1537} 1538 1539int fio_files_done(struct thread_data *td) 1540{ 1541 struct fio_file *f; 1542 unsigned int i; 1543 1544 for_each_file(td, f, i) 1545 if (!fio_file_done(f)) 1546 return 0; 1547 1548 return 1; 1549} 1550 1551/* free memory used in initialization phase only */ 1552void filesetup_mem_free(void) 1553{ 1554 free_already_allocated(); 1555} 1556