filesetup.c

   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
  23 static int root_warn;
  24
  25 static FLIST_HEAD(filename_list);
  26
  27 static 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  */
  36 static 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 ((td_io_unlink_file(td, f) < 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                 td_io_unlink_file(td, f);
 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);
 191 done:
 192         return 0;
 193 err:
 194         close(f->fd);
 195         f->fd = -1;
 196         if (b)
 197                 free(b);
 198         return 1;
 199 }
 200
 201 static 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
 249 error:
 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
 259 static unsigned long long get_rand_file_size(struct thread_data *td)
 260 {
 261         unsigned long long ret, sized;
 262         unsigned long r;
 263
 264         r = __rand(&td->file_size_state);
 265         sized = td->o.file_size_high - td->o.file_size_low;
 266         ret = (unsigned long long) ((double) sized * (r / (FRAND_MAX + 1.0)));
 267         ret += td->o.file_size_low;
 268         ret -= (ret % td->o.rw_min_bs);
 269         return ret;
 270 }
 271
 272 static int file_size(struct thread_data *td, struct fio_file *f)
 273 {
 274         struct stat st;
 275
 276         if (stat(f->file_name, &st) == -1) {
 277                 td_verror(td, errno, "fstat");
 278                 return 1;
 279         }
 280
 281         f->real_file_size = st.st_size;
 282         return 0;
 283 }
 284
 285 static int bdev_size(struct thread_data *td, struct fio_file *f)
 286 {
 287         unsigned long long bytes = 0;
 288         int r;
 289
 290         if (td->io_ops->open_file(td, f)) {
 291                 log_err("fio: failed opening blockdev %s for size check\n",
 292                         f->file_name);
 293                 return 1;
 294         }
 295
 296         r = blockdev_size(f, &bytes);
 297         if (r) {
 298                 td_verror(td, r, "blockdev_size");
 299                 goto err;
 300         }
 301
 302         if (!bytes) {
 303                 log_err("%s: zero sized block device?\n", f->file_name);
 304                 goto err;
 305         }
 306
 307         f->real_file_size = bytes;
 308         td->io_ops->close_file(td, f);
 309         return 0;
 310 err:
 311         td->io_ops->close_file(td, f);
 312         return 1;
 313 }
 314
 315 static int char_size(struct thread_data *td, struct fio_file *f)
 316 {
 317 #ifdef FIO_HAVE_CHARDEV_SIZE
 318         unsigned long long bytes = 0;
 319         int r;
 320
 321         if (td->io_ops->open_file(td, f)) {
 322                 log_err("fio: failed opening blockdev %s for size check\n",
 323                         f->file_name);
 324                 return 1;
 325         }
 326
 327         r = chardev_size(f, &bytes);
 328         if (r) {
 329                 td_verror(td, r, "chardev_size");
 330                 goto err;
 331         }
 332
 333         if (!bytes) {
 334                 log_err("%s: zero sized char device?\n", f->file_name);
 335                 goto err;
 336         }
 337
 338         f->real_file_size = bytes;
 339         td->io_ops->close_file(td, f);
 340         return 0;
 341 err:
 342         td->io_ops->close_file(td, f);
 343         return 1;
 344 #else
 345         f->real_file_size = -1ULL;
 346         return 0;
 347 #endif
 348 }
 349
 350 static int get_file_size(struct thread_data *td, struct fio_file *f)
 351 {
 352         int ret = 0;
 353
 354         if (fio_file_size_known(f))
 355                 return 0;
 356
 357         if (f->filetype == FIO_TYPE_FILE)
 358                 ret = file_size(td, f);
 359         else if (f->filetype == FIO_TYPE_BD)
 360                 ret = bdev_size(td, f);
 361         else if (f->filetype == FIO_TYPE_CHAR)
 362                 ret = char_size(td, f);
 363         else
 364                 f->real_file_size = -1;
 365
 366         if (ret)
 367                 return ret;
 368
 369         if (f->file_offset > f->real_file_size) {
 370                 log_err("%s: offset extends end (%llu > %llu)\n", td->o.name,
 371                                         (unsigned long long) f->file_offset,
 372                                         (unsigned long long) f->real_file_size);
 373                 return 1;
 374         }
 375
 376         fio_file_set_size_known(f);
 377         return 0;
 378 }
 379
 380 static int __file_invalidate_cache(struct thread_data *td, struct fio_file *f,
 381                                    unsigned long long off,
 382                                    unsigned long long len)
 383 {
 384         int ret = 0;
 385
 386 #ifdef CONFIG_ESX
 387         return 0;
 388 #endif
 389
 390         if (len == -1ULL)
 391                 len = f->io_size;
 392         if (off == -1ULL)
 393                 off = f->file_offset;
 394
 395         if (len == -1ULL || off == -1ULL)
 396                 return 0;
 397
 398         dprint(FD_IO, "invalidate cache %s: %llu/%llu\n", f->file_name, off,
 399                                                                 len);
 400
 401         if (td->io_ops->invalidate)
 402                 ret = td->io_ops->invalidate(td, f);
 403         else if (f->filetype == FIO_TYPE_FILE)
 404                 ret = posix_fadvise(f->fd, off, len, POSIX_FADV_DONTNEED);
 405         else if (f->filetype == FIO_TYPE_BD) {
 406                 ret = blockdev_invalidate_cache(f);
 407                 if (ret < 0 && errno == EACCES && geteuid()) {
 408                         if (!root_warn) {
 409                                 log_err("fio: only root may flush block "
 410                                         "devices. Cache flush bypassed!\n");
 411                                 root_warn = 1;
 412                         }
 413                         ret = 0;
 414                 }
 415         } else if (f->filetype == FIO_TYPE_CHAR || f->filetype == FIO_TYPE_PIPE)
 416                 ret = 0;
 417
 418         /*
 419          * Cache flushing isn't a fatal condition, and we know it will
 420          * happen on some platforms where we don't have the proper
 421          * function to flush eg block device caches. So just warn and
 422          * continue on our way.
 423          */
 424         if (ret) {
 425                 log_info("fio: cache invalidation of %s failed: %s\n", f->file_name, strerror(errno));
 426                 ret = 0;
 427         }
 428
 429         return 0;
 430
 431 }
 432
 433 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
 434 {
 435         if (!fio_file_open(f))
 436                 return 0;
 437
 438         return __file_invalidate_cache(td, f, -1ULL, -1ULL);
 439 }
 440
 441 int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
 442 {
 443         int ret = 0;
 444
 445         dprint(FD_FILE, "fd close %s\n", f->file_name);
 446
 447         remove_file_hash(f);
 448
 449         if (close(f->fd) < 0)
 450                 ret = errno;
 451
 452         f->fd = -1;
 453
 454         if (f->shadow_fd != -1) {
 455                 close(f->shadow_fd);
 456                 f->shadow_fd = -1;
 457         }
 458
 459         f->engine_data = 0;
 460         return ret;
 461 }
 462
 463 int file_lookup_open(struct fio_file *f, int flags)
 464 {
 465         struct fio_file *__f;
 466         int from_hash;
 467
 468         __f = lookup_file_hash(f->file_name);
 469         if (__f) {
 470                 dprint(FD_FILE, "found file in hash %s\n", f->file_name);
 471                 /*
 472                  * racy, need the __f->lock locked
 473                  */
 474                 f->lock = __f->lock;
 475                 from_hash = 1;
 476         } else {
 477                 dprint(FD_FILE, "file not found in hash %s\n", f->file_name);
 478                 from_hash = 0;
 479         }
 480
 481 #ifdef WIN32
 482         flags |= _O_BINARY;
 483 #endif
 484
 485         f->fd = open(f->file_name, flags, 0600);
 486         return from_hash;
 487 }
 488
 489 static int file_close_shadow_fds(struct thread_data *td)
 490 {
 491         struct fio_file *f;
 492         int num_closed = 0;
 493         unsigned int i;
 494
 495         for_each_file(td, f, i) {
 496                 if (f->shadow_fd == -1)
 497                         continue;
 498
 499                 close(f->shadow_fd);
 500                 f->shadow_fd = -1;
 501                 num_closed++;
 502         }
 503
 504         return num_closed;
 505 }
 506
 507 int generic_open_file(struct thread_data *td, struct fio_file *f)
 508 {
 509         int is_std = 0;
 510         int flags = 0;
 511         int from_hash = 0;
 512
 513         dprint(FD_FILE, "fd open %s\n", f->file_name);
 514
 515         if (!strcmp(f->file_name, "-")) {
 516                 if (td_rw(td)) {
 517                         log_err("fio: can't read/write to stdin/out\n");
 518                         return 1;
 519                 }
 520                 is_std = 1;
 521
 522                 /*
 523                  * move output logging to stderr, if we are writing to stdout
 524                  */
 525                 if (td_write(td))
 526                         f_out = stderr;
 527         }
 528
 529         if (td_trim(td))
 530                 goto skip_flags;
 531         if (td->o.odirect)
 532                 flags |= OS_O_DIRECT;
 533         if (td->o.oatomic) {
 534                 if (!FIO_O_ATOMIC) {
 535                         td_verror(td, EINVAL, "OS does not support atomic IO");
 536                         return 1;
 537                 }
 538                 flags |= OS_O_DIRECT | FIO_O_ATOMIC;
 539         }
 540         if (td->o.sync_io)
 541                 flags |= O_SYNC;
 542         if (td->o.create_on_open)
 543                 flags |= O_CREAT;
 544 skip_flags:
 545         if (f->filetype != FIO_TYPE_FILE)
 546                 flags |= FIO_O_NOATIME;
 547
 548 open_again:
 549         if (td_write(td)) {
 550                 if (!read_only)
 551                         flags |= O_RDWR;
 552
 553                 if (f->filetype == FIO_TYPE_FILE)
 554                         flags |= O_CREAT;
 555
 556                 if (is_std)
 557                         f->fd = dup(STDOUT_FILENO);
 558                 else
 559                         from_hash = file_lookup_open(f, flags);
 560         } else if (td_read(td)) {
 561                 if (f->filetype == FIO_TYPE_CHAR && !read_only)
 562                         flags |= O_RDWR;
 563                 else
 564                         flags |= O_RDONLY;
 565
 566                 if (is_std)
 567                         f->fd = dup(STDIN_FILENO);
 568                 else
 569                         from_hash = file_lookup_open(f, flags);
 570         } else { //td trim
 571                 flags |= O_RDWR;
 572                 from_hash = file_lookup_open(f, flags);
 573         }
 574
 575         if (f->fd == -1) {
 576                 char buf[FIO_VERROR_SIZE];
 577                 int __e = errno;
 578
 579                 if (__e == EPERM && (flags & FIO_O_NOATIME)) {
 580                         flags &= ~FIO_O_NOATIME;
 581                         goto open_again;
 582                 }
 583                 if (__e == EMFILE && file_close_shadow_fds(td))
 584                         goto open_again;
 585
 586                 snprintf(buf, sizeof(buf), "open(%s)", f->file_name);
 587
 588                 if (__e == EINVAL && (flags & OS_O_DIRECT)) {
 589                         log_err("fio: looks like your file system does not " \
 590                                 "support direct=1/buffered=0\n");
 591                 }
 592
 593                 td_verror(td, __e, buf);
 594                 return 1;
 595         }
 596
 597         if (!from_hash && f->fd != -1) {
 598                 if (add_file_hash(f)) {
 599                         int fio_unused ret;
 600
 601                         /*
 602                          * Stash away descriptor for later close. This is to
 603                          * work-around a "feature" on Linux, where a close of
 604                          * an fd that has been opened for write will trigger
 605                          * udev to call blkid to check partitions, fs id, etc.
 606                          * That pollutes the device cache, which can slow down
 607                          * unbuffered accesses.
 608                          */
 609                         if (f->shadow_fd == -1)
 610                                 f->shadow_fd = f->fd;
 611                         else {
 612                                 /*
 613                                  * OK to ignore, we haven't done anything
 614                                  * with it
 615                                  */
 616                                 ret = generic_close_file(td, f);
 617                         }
 618                         goto open_again;
 619                 }
 620         }
 621
 622         return 0;
 623 }
 624
 625 int generic_get_file_size(struct thread_data *td, struct fio_file *f)
 626 {
 627         return get_file_size(td, f);
 628 }
 629
 630 /*
 631  * open/close all files, so that ->real_file_size gets set
 632  */
 633 static int get_file_sizes(struct thread_data *td)
 634 {
 635         struct fio_file *f;
 636         unsigned int i;
 637         int err = 0;
 638
 639         for_each_file(td, f, i) {
 640                 dprint(FD_FILE, "get file size for %p/%d/%p\n", f, i,
 641                                                                 f->file_name);
 642
 643                 if (td_io_get_file_size(td, f)) {
 644                         if (td->error != ENOENT) {
 645                                 log_err("%s\n", td->verror);
 646                                 err = 1;
 647                                 break;
 648                         }
 649                         clear_error(td);
 650                 }
 651
 652                 if (f->real_file_size == -1ULL && td->o.size)
 653                         f->real_file_size = td->o.size / td->o.nr_files;
 654         }
 655
 656         return err;
 657 }
 658
 659 struct fio_mount {
 660         struct flist_head list;
 661         const char *base;
 662         char __base[256];
 663         unsigned int key;
 664 };
 665
 666 /*
 667  * Get free number of bytes for each file on each unique mount.
 668  */
 669 static unsigned long long get_fs_free_counts(struct thread_data *td)
 670 {
 671         struct flist_head *n, *tmp;
 672         unsigned long long ret = 0;
 673         struct fio_mount *fm;
 674         FLIST_HEAD(list);
 675         struct fio_file *f;
 676         unsigned int i;
 677
 678         for_each_file(td, f, i) {
 679                 struct stat sb;
 680                 char buf[256];
 681
 682                 if (f->filetype == FIO_TYPE_BD || f->filetype == FIO_TYPE_CHAR) {
 683                         if (f->real_file_size != -1ULL)
 684                                 ret += f->real_file_size;
 685                         continue;
 686                 } else if (f->filetype != FIO_TYPE_FILE)
 687                         continue;
 688
 689                 buf[255] = '\0';
 690                 strncpy(buf, f->file_name, 255);
 691
 692                 if (stat(buf, &sb) < 0) {
 693                         if (errno != ENOENT)
 694                                 break;
 695                         strcpy(buf, ".");
 696                         if (stat(buf, &sb) < 0)
 697                                 break;
 698                 }
 699
 700                 fm = NULL;
 701                 flist_for_each(n, &list) {
 702                         fm = flist_entry(n, struct fio_mount, list);
 703                         if (fm->key == sb.st_dev)
 704                                 break;
 705
 706                         fm = NULL;
 707                 }
 708
 709                 if (fm)
 710                         continue;
 711
 712                 fm = calloc(1, sizeof(*fm));
 713                 strncpy(fm->__base, buf, sizeof(fm->__base) - 1);
 714                 fm->base = basename(fm->__base);
 715                 fm->key = sb.st_dev;
 716                 flist_add(&fm->list, &list);
 717         }
 718
 719         flist_for_each_safe(n, tmp, &list) {
 720                 unsigned long long sz;
 721
 722                 fm = flist_entry(n, struct fio_mount, list);
 723                 flist_del(&fm->list);
 724
 725                 sz = get_fs_size(fm->base);
 726                 if (sz && sz != -1ULL)
 727                         ret += sz;
 728
 729                 free(fm);
 730         }
 731
 732         return ret;
 733 }
 734
 735 uint64_t get_start_offset(struct thread_data *td, struct fio_file *f)
 736 {
 737         struct thread_options *o = &td->o;
 738
 739         if (o->file_append && f->filetype == FIO_TYPE_FILE)
 740                 return f->real_file_size;
 741
 742         return td->o.start_offset +
 743                 td->subjob_number * td->o.offset_increment;
 744 }
 745
 746 /*
 747  * Open the files and setup files sizes, creating files if necessary.
 748  */
 749 int setup_files(struct thread_data *td)
 750 {
 751         unsigned long long total_size, extend_size;
 752         struct thread_options *o = &td->o;
 753         struct fio_file *f;
 754         unsigned int i, nr_fs_extra = 0;
 755         int err = 0, need_extend;
 756         int old_state;
 757         const unsigned int bs = td_min_bs(td);
 758         uint64_t fs = 0;
 759
 760         dprint(FD_FILE, "setup files\n");
 761
 762         old_state = td_bump_runstate(td, TD_SETTING_UP);
 763
 764         if (o->read_iolog_file)
 765                 goto done;
 766
 767         /*
 768          * if ioengine defines a setup() method, it's responsible for
 769          * opening the files and setting f->real_file_size to indicate
 770          * the valid range for that file.
 771          */
 772         if (td->io_ops->setup)
 773                 err = td->io_ops->setup(td);
 774         else
 775                 err = get_file_sizes(td);
 776
 777         if (err)
 778                 goto err_out;
 779
 780         /*
 781          * check sizes. if the files/devices do not exist and the size
 782          * isn't passed to fio, abort.
 783          */
 784         total_size = 0;
 785         for_each_file(td, f, i) {
 786                 if (f->real_file_size == -1ULL)
 787                         total_size = -1ULL;
 788                 else
 789                         total_size += f->real_file_size;
 790         }
 791
 792         if (o->fill_device)
 793                 td->fill_device_size = get_fs_free_counts(td);
 794
 795         /*
 796          * device/file sizes are zero and no size given, punt
 797          */
 798         if ((!total_size || total_size == -1ULL) && !o->size &&
 799             !(td->io_ops->flags & FIO_NOIO) && !o->fill_device &&
 800             !(o->nr_files && (o->file_size_low || o->file_size_high))) {
 801                 log_err("%s: you need to specify size=\n", o->name);
 802                 td_verror(td, EINVAL, "total_file_size");
 803                 goto err_out;
 804         }
 805
 806         /*
 807          * Calculate per-file size and potential extra size for the
 808          * first files, if needed.
 809          */
 810         if (!o->file_size_low && o->nr_files) {
 811                 uint64_t all_fs;
 812
 813                 fs = o->size / o->nr_files;
 814                 all_fs = fs * o->nr_files;
 815
 816                 if (all_fs < o->size)
 817                         nr_fs_extra = (o->size - all_fs) / bs;
 818         }
 819
 820         /*
 821          * now file sizes are known, so we can set ->io_size. if size= is
 822          * not given, ->io_size is just equal to ->real_file_size. if size
 823          * is given, ->io_size is size / nr_files.
 824          */
 825         extend_size = total_size = 0;
 826         need_extend = 0;
 827         for_each_file(td, f, i) {
 828                 f->file_offset = get_start_offset(td, f);
 829
 830                 if (!o->file_size_low) {
 831                         /*
 832                          * no file size range given, file size is equal to
 833                          * total size divided by number of files. If that is
 834                          * zero, set it to the real file size. If the size
 835                          * doesn't divide nicely with the min blocksize,
 836                          * make the first files bigger.
 837                          */
 838                         f->io_size = fs;
 839                         if (nr_fs_extra) {
 840                                 nr_fs_extra--;
 841                                 f->io_size += bs;
 842                         }
 843
 844                         if (!f->io_size)
 845                                 f->io_size = f->real_file_size - f->file_offset;
 846                 } else if (f->real_file_size < o->file_size_low ||
 847                            f->real_file_size > o->file_size_high) {
 848                         if (f->file_offset > o->file_size_low)
 849                                 goto err_offset;
 850                         /*
 851                          * file size given. if it's fixed, use that. if it's a
 852                          * range, generate a random size in-between.
 853                          */
 854                         if (o->file_size_low == o->file_size_high)
 855                                 f->io_size = o->file_size_low - f->file_offset;
 856                         else {
 857                                 f->io_size = get_rand_file_size(td)
 858                                                 - f->file_offset;
 859                         }
 860                 } else
 861                         f->io_size = f->real_file_size - f->file_offset;
 862
 863                 if (f->io_size == -1ULL)
 864                         total_size = -1ULL;
 865                 else {
 866                         if (o->size_percent)
 867                                 f->io_size = (f->io_size * o->size_percent) / 100;
 868                         total_size += f->io_size;
 869                 }
 870
 871                 if (f->filetype == FIO_TYPE_FILE &&
 872                     (f->io_size + f->file_offset) > f->real_file_size &&
 873                     !(td->io_ops->flags & FIO_DISKLESSIO)) {
 874                         if (!o->create_on_open) {
 875                                 need_extend++;
 876                                 extend_size += (f->io_size + f->file_offset);
 877                         } else
 878                                 f->real_file_size = f->io_size + f->file_offset;
 879                         fio_file_set_extend(f);
 880                 }
 881         }
 882
 883         if (!o->size || (total_size && o->size > total_size))
 884                 o->size = total_size;
 885
 886         if (o->size < td_min_bs(td)) {
 887                 log_err("fio: blocksize too large for data set\n");
 888                 goto err_out;
 889         }
 890
 891         /*
 892          * See if we need to extend some files
 893          */
 894         if (need_extend) {
 895                 temp_stall_ts = 1;
 896                 if (output_format == FIO_OUTPUT_NORMAL)
 897                         log_info("%s: Laying out IO file(s) (%u file(s) /"
 898                                  " %lluMB)\n", o->name, need_extend,
 899                                         extend_size >> 20);
 900
 901                 for_each_file(td, f, i) {
 902                         unsigned long long old_len = -1ULL, extend_len = -1ULL;
 903
 904                         if (!fio_file_extend(f))
 905                                 continue;
 906
 907                         assert(f->filetype == FIO_TYPE_FILE);
 908                         fio_file_clear_extend(f);
 909                         if (!o->fill_device) {
 910                                 old_len = f->real_file_size;
 911                                 extend_len = f->io_size + f->file_offset -
 912                                                 old_len;
 913                         }
 914                         f->real_file_size = (f->io_size + f->file_offset);
 915                         err = extend_file(td, f);
 916                         if (err)
 917                                 break;
 918
 919                         err = __file_invalidate_cache(td, f, old_len,
 920                                                                 extend_len);
 921
 922                         /*
 923                          * Shut up static checker
 924                          */
 925                         if (f->fd != -1)
 926                                 close(f->fd);
 927
 928                         f->fd = -1;
 929                         if (err)
 930                                 break;
 931                 }
 932                 temp_stall_ts = 0;
 933         }
 934
 935         if (err)
 936                 goto err_out;
 937
 938         if (!o->zone_size)
 939                 o->zone_size = o->size;
 940
 941         /*
 942          * iolog already set the total io size, if we read back
 943          * stored entries.
 944          */
 945         if (!o->read_iolog_file) {
 946                 if (o->io_limit)
 947                         td->total_io_size = o->io_limit * o->loops;
 948                 else
 949                         td->total_io_size = o->size * o->loops;
 950         }
 951
 952 done:
 953         if (o->create_only)
 954                 td->done = 1;
 955
 956         td_restore_runstate(td, old_state);
 957         return 0;
 958 err_offset:
 959         log_err("%s: you need to specify valid offset=\n", o->name);
 960 err_out:
 961         td_restore_runstate(td, old_state);
 962         return 1;
 963 }
 964
 965 int pre_read_files(struct thread_data *td)
 966 {
 967         struct fio_file *f;
 968         unsigned int i;
 969
 970         dprint(FD_FILE, "pre_read files\n");
 971
 972         for_each_file(td, f, i) {
 973                 pre_read_file(td, f);
 974         }
 975
 976         return 1;
 977 }
 978
 979 static int __init_rand_distribution(struct thread_data *td, struct fio_file *f)
 980 {
 981         unsigned int range_size, seed;
 982         unsigned long nranges;
 983         uint64_t fsize;
 984
 985         range_size = min(td->o.min_bs[DDIR_READ], td->o.min_bs[DDIR_WRITE]);
 986         fsize = min(f->real_file_size, f->io_size);
 987
 988         nranges = (fsize + range_size - 1) / range_size;
 989
 990         seed = jhash(f->file_name, strlen(f->file_name), 0) * td->thread_number;
 991         if (!td->o.rand_repeatable)
 992                 seed = td->rand_seeds[4];
 993
 994         if (td->o.random_distribution == FIO_RAND_DIST_ZIPF)
 995                 zipf_init(&f->zipf, nranges, td->o.zipf_theta.u.f, seed);
 996         else if (td->o.random_distribution == FIO_RAND_DIST_PARETO)
 997                 pareto_init(&f->zipf, nranges, td->o.pareto_h.u.f, seed);
 998         else if (td->o.random_distribution == FIO_RAND_DIST_GAUSS)
 999                 gauss_init(&f->gauss, nranges, td->o.gauss_dev.u.f, seed);
1000
1001         return 1;
1002 }
1003
1004 static int init_rand_distribution(struct thread_data *td)
1005 {
1006         struct fio_file *f;
1007         unsigned int i;
1008         int state;
1009
1010         if (td->o.random_distribution == FIO_RAND_DIST_RANDOM)
1011                 return 0;
1012
1013         state = td_bump_runstate(td, TD_SETTING_UP);
1014
1015         for_each_file(td, f, i)
1016                 __init_rand_distribution(td, f);
1017
1018         td_restore_runstate(td, state);
1019
1020         return 1;
1021 }
1022
1023 int init_random_map(struct thread_data *td)
1024 {
1025         unsigned long long blocks;
1026         struct fio_file *f;
1027         unsigned int i;
1028
1029         if (init_rand_distribution(td))
1030                 return 0;
1031         if (!td_random(td))
1032                 return 0;
1033
1034         for_each_file(td, f, i) {
1035                 uint64_t fsize = min(f->real_file_size, f->io_size);
1036
1037                 blocks = fsize / (unsigned long long) td->o.rw_min_bs;
1038
1039                 if (td->o.random_generator == FIO_RAND_GEN_LFSR) {
1040                         unsigned long seed;
1041
1042                         seed = td->rand_seeds[FIO_RAND_BLOCK_OFF];
1043
1044                         if (!lfsr_init(&f->lfsr, blocks, seed, 0)) {
1045                                 fio_file_set_lfsr(f);
1046                                 continue;
1047                         }
1048                 } else if (!td->o.norandommap) {
1049                         f->io_axmap = axmap_new(blocks);
1050                         if (f->io_axmap) {
1051                                 fio_file_set_axmap(f);
1052                                 continue;
1053                         }
1054                 } else if (td->o.norandommap)
1055                         continue;
1056
1057                 if (!td->o.softrandommap) {
1058                         log_err("fio: failed allocating random map. If running"
1059                                 " a large number of jobs, try the 'norandommap'"
1060                                 " option or set 'softrandommap'. Or give"
1061                                 " a larger --alloc-size to fio.\n");
1062                         return 1;
1063                 }
1064
1065                 log_info("fio: file %s failed allocating random map. Running "
1066                          "job without.\n", f->file_name);
1067         }
1068
1069         return 0;
1070 }
1071
1072 void close_files(struct thread_data *td)
1073 {
1074         struct fio_file *f;
1075         unsigned int i;
1076
1077         for_each_file(td, f, i) {
1078                 if (fio_file_open(f))
1079                         td_io_close_file(td, f);
1080         }
1081 }
1082
1083 void close_and_free_files(struct thread_data *td)
1084 {
1085         struct fio_file *f;
1086         unsigned int i;
1087
1088         dprint(FD_FILE, "close files\n");
1089
1090         for_each_file(td, f, i) {
1091                 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
1092                         dprint(FD_FILE, "free unlink %s\n", f->file_name);
1093                         td_io_unlink_file(td, f);
1094                 }
1095
1096                 if (fio_file_open(f))
1097                         td_io_close_file(td, f);
1098
1099                 remove_file_hash(f);
1100
1101                 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
1102                         dprint(FD_FILE, "free unlink %s\n", f->file_name);
1103                         td_io_unlink_file(td, f);
1104                 }
1105
1106                 sfree(f->file_name);
1107                 f->file_name = NULL;
1108                 if (fio_file_axmap(f)) {
1109                         axmap_free(f->io_axmap);
1110                         f->io_axmap = NULL;
1111                 }
1112                 sfree(f);
1113         }
1114
1115         td->o.filename = NULL;
1116         free(td->files);
1117         free(td->file_locks);
1118         td->files_index = 0;
1119         td->files = NULL;
1120         td->file_locks = NULL;
1121         td->o.file_lock_mode = FILE_LOCK_NONE;
1122         td->o.nr_files = 0;
1123 }
1124
1125 static void get_file_type(struct fio_file *f)
1126 {
1127         struct stat sb;
1128
1129         if (!strcmp(f->file_name, "-"))
1130                 f->filetype = FIO_TYPE_PIPE;
1131         else
1132                 f->filetype = FIO_TYPE_FILE;
1133
1134         /* \\.\ is the device namespace in Windows, where every file is
1135          * a block device */
1136         if (strncmp(f->file_name, "\\\\.\\", 4) == 0)
1137                 f->filetype = FIO_TYPE_BD;
1138
1139         if (!stat(f->file_name, &sb)) {
1140                 if (S_ISBLK(sb.st_mode))
1141                         f->filetype = FIO_TYPE_BD;
1142                 else if (S_ISCHR(sb.st_mode))
1143                         f->filetype = FIO_TYPE_CHAR;
1144                 else if (S_ISFIFO(sb.st_mode))
1145                         f->filetype = FIO_TYPE_PIPE;
1146         }
1147 }
1148
1149 static int __is_already_allocated(const char *fname)
1150 {
1151         struct flist_head *entry;
1152         char *filename;
1153
1154         if (flist_empty(&filename_list))
1155                 return 0;
1156
1157         flist_for_each(entry, &filename_list) {
1158                 filename = flist_entry(entry, struct file_name, list)->filename;
1159
1160                 if (strcmp(filename, fname) == 0)
1161                         return 1;
1162         }
1163
1164         return 0;
1165 }
1166
1167 static int is_already_allocated(const char *fname)
1168 {
1169         int ret;
1170
1171         fio_file_hash_lock();
1172         ret = __is_already_allocated(fname);
1173         fio_file_hash_unlock();
1174         return ret;
1175 }
1176
1177 static void set_already_allocated(const char *fname)
1178 {
1179         struct file_name *fn;
1180
1181         fn = malloc(sizeof(struct file_name));
1182         fn->filename = strdup(fname);
1183
1184         fio_file_hash_lock();
1185         if (!__is_already_allocated(fname)) {
1186                 flist_add_tail(&fn->list, &filename_list);
1187                 fn = NULL;
1188         }
1189         fio_file_hash_unlock();
1190
1191         if (fn) {
1192                 free(fn->filename);
1193                 free(fn);
1194         }
1195 }
1196
1197
1198 static void free_already_allocated(void)
1199 {
1200         struct flist_head *entry, *tmp;
1201         struct file_name *fn;
1202
1203         if (flist_empty(&filename_list))
1204                 return;
1205
1206         fio_file_hash_lock();
1207         flist_for_each_safe(entry, tmp, &filename_list) {
1208                 fn = flist_entry(entry, struct file_name, list);
1209                 free(fn->filename);
1210                 flist_del(&fn->list);
1211                 free(fn);
1212         }
1213
1214         fio_file_hash_unlock();
1215 }
1216
1217 static struct fio_file *alloc_new_file(struct thread_data *td)
1218 {
1219         struct fio_file *f;
1220
1221         f = smalloc(sizeof(*f));
1222         if (!f) {
1223                 log_err("fio: smalloc OOM\n");
1224                 assert(0);
1225                 return NULL;
1226         }
1227
1228         f->fd = -1;
1229         f->shadow_fd = -1;
1230         fio_file_reset(td, f);
1231         return f;
1232 }
1233
1234 int add_file(struct thread_data *td, const char *fname, int numjob, int inc)
1235 {
1236         int cur_files = td->files_index;
1237         char file_name[PATH_MAX];
1238         struct fio_file *f;
1239         int len = 0;
1240
1241         dprint(FD_FILE, "add file %s\n", fname);
1242
1243         if (td->o.directory)
1244                 len = set_name_idx(file_name, td->o.directory, numjob);
1245
1246         sprintf(file_name + len, "%s", fname);
1247
1248         /* clean cloned siblings using existing files */
1249         if (numjob && is_already_allocated(file_name))
1250                 return 0;
1251
1252         f = alloc_new_file(td);
1253
1254         if (td->files_size <= td->files_index) {
1255                 unsigned int new_size = td->o.nr_files + 1;
1256
1257                 dprint(FD_FILE, "resize file array to %d files\n", new_size);
1258
1259                 td->files = realloc(td->files, new_size * sizeof(f));
1260                 if (td->files == NULL) {
1261                         log_err("fio: realloc OOM\n");
1262                         assert(0);
1263                 }
1264                 if (td->o.file_lock_mode != FILE_LOCK_NONE) {
1265                         td->file_locks = realloc(td->file_locks, new_size);
1266                         if (!td->file_locks) {
1267                                 log_err("fio: realloc OOM\n");
1268                                 assert(0);
1269                         }
1270                         td->file_locks[cur_files] = FILE_LOCK_NONE;
1271                 }
1272                 td->files_size = new_size;
1273         }
1274         td->files[cur_files] = f;
1275         f->fileno = cur_files;
1276
1277         /*
1278          * init function, io engine may not be loaded yet
1279          */
1280         if (td->io_ops && (td->io_ops->flags & FIO_DISKLESSIO))
1281                 f->real_file_size = -1ULL;
1282
1283         f->file_name = smalloc_strdup(file_name);
1284         if (!f->file_name) {
1285                 log_err("fio: smalloc OOM\n");
1286                 assert(0);
1287         }
1288
1289         get_file_type(f);
1290
1291         switch (td->o.file_lock_mode) {
1292         case FILE_LOCK_NONE:
1293                 break;
1294         case FILE_LOCK_READWRITE:
1295                 f->rwlock = fio_rwlock_init();
1296                 break;
1297         case FILE_LOCK_EXCLUSIVE:
1298                 f->lock = fio_mutex_init(FIO_MUTEX_UNLOCKED);
1299                 break;
1300         default:
1301                 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
1302                 assert(0);
1303         }
1304
1305         td->files_index++;
1306         if (f->filetype == FIO_TYPE_FILE)
1307                 td->nr_normal_files++;
1308
1309         set_already_allocated(file_name);
1310
1311         if (inc)
1312                 td->o.nr_files++;
1313
1314         dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name,
1315                                                         cur_files);
1316
1317         return cur_files;
1318 }
1319
1320 int add_file_exclusive(struct thread_data *td, const char *fname)
1321 {
1322         struct fio_file *f;
1323         unsigned int i;
1324
1325         for_each_file(td, f, i) {
1326                 if (!strcmp(f->file_name, fname))
1327                         return i;
1328         }
1329
1330         return add_file(td, fname, 0, 1);
1331 }
1332
1333 void get_file(struct fio_file *f)
1334 {
1335         dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
1336         assert(fio_file_open(f));
1337         f->references++;
1338 }
1339
1340 int put_file(struct thread_data *td, struct fio_file *f)
1341 {
1342         int f_ret = 0, ret = 0;
1343
1344         dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
1345
1346         if (!fio_file_open(f)) {
1347                 assert(f->fd == -1);
1348                 return 0;
1349         }
1350
1351         assert(f->references);
1352         if (--f->references)
1353                 return 0;
1354
1355         if (should_fsync(td) && td->o.fsync_on_close) {
1356                 f_ret = fsync(f->fd);
1357                 if (f_ret < 0)
1358                         f_ret = errno;
1359         }
1360
1361         if (td->io_ops->close_file)
1362                 ret = td->io_ops->close_file(td, f);
1363
1364         if (!ret)
1365                 ret = f_ret;
1366
1367         td->nr_open_files--;
1368         fio_file_clear_open(f);
1369         assert(f->fd == -1);
1370         return ret;
1371 }
1372
1373 void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
1374 {
1375         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1376                 return;
1377
1378         if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
1379                 if (ddir == DDIR_READ)
1380                         fio_rwlock_read(f->rwlock);
1381                 else
1382                         fio_rwlock_write(f->rwlock);
1383         } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1384                 fio_mutex_down(f->lock);
1385
1386         td->file_locks[f->fileno] = td->o.file_lock_mode;
1387 }
1388
1389 void unlock_file(struct thread_data *td, struct fio_file *f)
1390 {
1391         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1392                 return;
1393
1394         if (td->o.file_lock_mode == FILE_LOCK_READWRITE)
1395                 fio_rwlock_unlock(f->rwlock);
1396         else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1397                 fio_mutex_up(f->lock);
1398
1399         td->file_locks[f->fileno] = FILE_LOCK_NONE;
1400 }
1401
1402 void unlock_file_all(struct thread_data *td, struct fio_file *f)
1403 {
1404         if (td->o.file_lock_mode == FILE_LOCK_NONE || !td->file_locks)
1405                 return;
1406         if (td->file_locks[f->fileno] != FILE_LOCK_NONE)
1407                 unlock_file(td, f);
1408 }
1409
1410 static int recurse_dir(struct thread_data *td, const char *dirname)
1411 {
1412         struct dirent *dir;
1413         int ret = 0;
1414         DIR *D;
1415
1416         D = opendir(dirname);
1417         if (!D) {
1418                 char buf[FIO_VERROR_SIZE];
1419
1420                 snprintf(buf, FIO_VERROR_SIZE, "opendir(%s)", dirname);
1421                 td_verror(td, errno, buf);
1422                 return 1;
1423         }
1424
1425         while ((dir = readdir(D)) != NULL) {
1426                 char full_path[PATH_MAX];
1427                 struct stat sb;
1428
1429                 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
1430                         continue;
1431
1432                 sprintf(full_path, "%s%s%s", dirname, FIO_OS_PATH_SEPARATOR, dir->d_name);
1433
1434                 if (lstat(full_path, &sb) == -1) {
1435                         if (errno != ENOENT) {
1436                                 td_verror(td, errno, "stat");
1437                                 ret = 1;
1438                                 break;
1439                         }
1440                 }
1441
1442                 if (S_ISREG(sb.st_mode)) {
1443                         add_file(td, full_path, 0, 1);
1444                         continue;
1445                 }
1446                 if (!S_ISDIR(sb.st_mode))
1447                         continue;
1448
1449                 ret = recurse_dir(td, full_path);
1450                 if (ret)
1451                         break;
1452         }
1453
1454         closedir(D);
1455         return ret;
1456 }
1457
1458 int add_dir_files(struct thread_data *td, const char *path)
1459 {
1460         int ret = recurse_dir(td, path);
1461
1462         if (!ret)
1463                 log_info("fio: opendir added %d files\n", td->o.nr_files);
1464
1465         return ret;
1466 }
1467
1468 void dup_files(struct thread_data *td, struct thread_data *org)
1469 {
1470         struct fio_file *f;
1471         unsigned int i;
1472
1473         dprint(FD_FILE, "dup files: %d\n", org->files_index);
1474
1475         if (!org->files)
1476                 return;
1477
1478         td->files = malloc(org->files_index * sizeof(f));
1479
1480         if (td->o.file_lock_mode != FILE_LOCK_NONE)
1481                 td->file_locks = malloc(org->files_index);
1482
1483         for_each_file(org, f, i) {
1484                 struct fio_file *__f;
1485
1486                 __f = alloc_new_file(td);
1487
1488                 if (f->file_name) {
1489                         __f->file_name = smalloc_strdup(f->file_name);
1490                         if (!__f->file_name) {
1491                                 log_err("fio: smalloc OOM\n");
1492                                 assert(0);
1493                         }
1494
1495                         __f->filetype = f->filetype;
1496                 }
1497
1498                 if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1499                         __f->lock = f->lock;
1500                 else if (td->o.file_lock_mode == FILE_LOCK_READWRITE)
1501                         __f->rwlock = f->rwlock;
1502
1503                 td->files[i] = __f;
1504         }
1505 }
1506
1507 /*
1508  * Returns the index that matches the filename, or -1 if not there
1509  */
1510 int get_fileno(struct thread_data *td, const char *fname)
1511 {
1512         struct fio_file *f;
1513         unsigned int i;
1514
1515         for_each_file(td, f, i)
1516                 if (!strcmp(f->file_name, fname))
1517                         return i;
1518
1519         return -1;
1520 }
1521
1522 /*
1523  * For log usage, where we add/open/close files automatically
1524  */
1525 void free_release_files(struct thread_data *td)
1526 {
1527         close_files(td);
1528         td->o.nr_files = 0;
1529         td->o.open_files = 0;
1530         td->files_index = 0;
1531         td->nr_normal_files = 0;
1532 }
1533
1534 void fio_file_reset(struct thread_data *td, struct fio_file *f)
1535 {
1536         int i;
1537
1538         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1539                 f->last_pos[i] = f->file_offset;
1540                 f->last_start[i] = -1ULL;
1541         }
1542
1543         if (fio_file_axmap(f))
1544                 axmap_reset(f->io_axmap);
1545         else if (fio_file_lfsr(f))
1546                 lfsr_reset(&f->lfsr, td->rand_seeds[FIO_RAND_BLOCK_OFF]);
1547 }
1548
1549 int fio_files_done(struct thread_data *td)
1550 {
1551         struct fio_file *f;
1552         unsigned int i;
1553
1554         for_each_file(td, f, i)
1555                 if (!fio_file_done(f))
1556                         return 0;
1557
1558         return 1;
1559 }
1560
1561 /* free memory used in initialization phase only */
1562 void filesetup_mem_free(void)
1563 {
1564         free_already_allocated();
1565 }