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 (td->o.block_error_hist) {
 884                 int len;
 885
 886                 assert(td->o.nr_files == 1);    /* checked in fixup_options */
 887                 f = td->files[0];
 888                 len = f->io_size / td->o.bs[DDIR_TRIM];
 889                 if (len > MAX_NR_BLOCK_INFOS || len <= 0) {
 890                         log_err("fio: cannot calculate block histogram with "
 891                                 "%d trim blocks, maximum %d\n",
 892                                 len, MAX_NR_BLOCK_INFOS);
 893                         td_verror(td, EINVAL, "block_error_hist");
 894                         goto err_out;
 895                 }
 896
 897                 td->ts.nr_block_infos = len;
 898                 for (int i = 0; i < len; i++)
 899                         td->ts.block_infos[i] =
 900                                 BLOCK_INFO(0, BLOCK_STATE_UNINIT);
 901         } else
 902                 td->ts.nr_block_infos = 0;
 903
 904         if (!o->size || (total_size && o->size > total_size))
 905                 o->size = total_size;
 906
 907         if (o->size < td_min_bs(td)) {
 908                 log_err("fio: blocksize too large for data set\n");
 909                 goto err_out;
 910         }
 911
 912         /*
 913          * See if we need to extend some files
 914          */
 915         if (need_extend) {
 916                 temp_stall_ts = 1;
 917                 if (output_format == FIO_OUTPUT_NORMAL)
 918                         log_info("%s: Laying out IO file(s) (%u file(s) /"
 919                                  " %lluMB)\n", o->name, need_extend,
 920                                         extend_size >> 20);
 921
 922                 for_each_file(td, f, i) {
 923                         unsigned long long old_len = -1ULL, extend_len = -1ULL;
 924
 925                         if (!fio_file_extend(f))
 926                                 continue;
 927
 928                         assert(f->filetype == FIO_TYPE_FILE);
 929                         fio_file_clear_extend(f);
 930                         if (!o->fill_device) {
 931                                 old_len = f->real_file_size;
 932                                 extend_len = f->io_size + f->file_offset -
 933                                                 old_len;
 934                         }
 935                         f->real_file_size = (f->io_size + f->file_offset);
 936                         err = extend_file(td, f);
 937                         if (err)
 938                                 break;
 939
 940                         err = __file_invalidate_cache(td, f, old_len,
 941                                                                 extend_len);
 942
 943                         /*
 944                          * Shut up static checker
 945                          */
 946                         if (f->fd != -1)
 947                                 close(f->fd);
 948
 949                         f->fd = -1;
 950                         if (err)
 951                                 break;
 952                 }
 953                 temp_stall_ts = 0;
 954         }
 955
 956         if (err)
 957                 goto err_out;
 958
 959         if (!o->zone_size)
 960                 o->zone_size = o->size;
 961
 962         /*
 963          * iolog already set the total io size, if we read back
 964          * stored entries.
 965          */
 966         if (!o->read_iolog_file) {
 967                 if (o->io_limit)
 968                         td->total_io_size = o->io_limit * o->loops;
 969                 else
 970                         td->total_io_size = o->size * o->loops;
 971         }
 972
 973 done:
 974         if (o->create_only)
 975                 td->done = 1;
 976
 977         td_restore_runstate(td, old_state);
 978         return 0;
 979 err_offset:
 980         log_err("%s: you need to specify valid offset=\n", o->name);
 981 err_out:
 982         td_restore_runstate(td, old_state);
 983         return 1;
 984 }
 985
 986 int pre_read_files(struct thread_data *td)
 987 {
 988         struct fio_file *f;
 989         unsigned int i;
 990
 991         dprint(FD_FILE, "pre_read files\n");
 992
 993         for_each_file(td, f, i) {
 994                 pre_read_file(td, f);
 995         }
 996
 997         return 1;
 998 }
 999
1000 static int __init_rand_distribution(struct thread_data *td, struct fio_file *f)
1001 {
1002         unsigned int range_size, seed;
1003         unsigned long nranges;
1004         uint64_t fsize;
1005
1006         range_size = min(td->o.min_bs[DDIR_READ], td->o.min_bs[DDIR_WRITE]);
1007         fsize = min(f->real_file_size, f->io_size);
1008
1009         nranges = (fsize + range_size - 1) / range_size;
1010
1011         seed = jhash(f->file_name, strlen(f->file_name), 0) * td->thread_number;
1012         if (!td->o.rand_repeatable)
1013                 seed = td->rand_seeds[4];
1014
1015         if (td->o.random_distribution == FIO_RAND_DIST_ZIPF)
1016                 zipf_init(&f->zipf, nranges, td->o.zipf_theta.u.f, seed);
1017         else if (td->o.random_distribution == FIO_RAND_DIST_PARETO)
1018                 pareto_init(&f->zipf, nranges, td->o.pareto_h.u.f, seed);
1019         else if (td->o.random_distribution == FIO_RAND_DIST_GAUSS)
1020                 gauss_init(&f->gauss, nranges, td->o.gauss_dev.u.f, seed);
1021
1022         return 1;
1023 }
1024
1025 static int init_rand_distribution(struct thread_data *td)
1026 {
1027         struct fio_file *f;
1028         unsigned int i;
1029         int state;
1030
1031         if (td->o.random_distribution == FIO_RAND_DIST_RANDOM)
1032                 return 0;
1033
1034         state = td_bump_runstate(td, TD_SETTING_UP);
1035
1036         for_each_file(td, f, i)
1037                 __init_rand_distribution(td, f);
1038
1039         td_restore_runstate(td, state);
1040
1041         return 1;
1042 }
1043
1044 int init_random_map(struct thread_data *td)
1045 {
1046         unsigned long long blocks;
1047         struct fio_file *f;
1048         unsigned int i;
1049
1050         if (init_rand_distribution(td))
1051                 return 0;
1052         if (!td_random(td))
1053                 return 0;
1054
1055         for_each_file(td, f, i) {
1056                 uint64_t fsize = min(f->real_file_size, f->io_size);
1057
1058                 blocks = fsize / (unsigned long long) td->o.rw_min_bs;
1059
1060                 if (td->o.random_generator == FIO_RAND_GEN_LFSR) {
1061                         unsigned long seed;
1062
1063                         seed = td->rand_seeds[FIO_RAND_BLOCK_OFF];
1064
1065                         if (!lfsr_init(&f->lfsr, blocks, seed, 0)) {
1066                                 fio_file_set_lfsr(f);
1067                                 continue;
1068                         }
1069                 } else if (!td->o.norandommap) {
1070                         f->io_axmap = axmap_new(blocks);
1071                         if (f->io_axmap) {
1072                                 fio_file_set_axmap(f);
1073                                 continue;
1074                         }
1075                 } else if (td->o.norandommap)
1076                         continue;
1077
1078                 if (!td->o.softrandommap) {
1079                         log_err("fio: failed allocating random map. If running"
1080                                 " a large number of jobs, try the 'norandommap'"
1081                                 " option or set 'softrandommap'. Or give"
1082                                 " a larger --alloc-size to fio.\n");
1083                         return 1;
1084                 }
1085
1086                 log_info("fio: file %s failed allocating random map. Running "
1087                          "job without.\n", f->file_name);
1088         }
1089
1090         return 0;
1091 }
1092
1093 void close_files(struct thread_data *td)
1094 {
1095         struct fio_file *f;
1096         unsigned int i;
1097
1098         for_each_file(td, f, i) {
1099                 if (fio_file_open(f))
1100                         td_io_close_file(td, f);
1101         }
1102 }
1103
1104 void close_and_free_files(struct thread_data *td)
1105 {
1106         struct fio_file *f;
1107         unsigned int i;
1108
1109         dprint(FD_FILE, "close files\n");
1110
1111         for_each_file(td, f, i) {
1112                 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
1113                         dprint(FD_FILE, "free unlink %s\n", f->file_name);
1114                         td_io_unlink_file(td, f);
1115                 }
1116
1117                 if (fio_file_open(f))
1118                         td_io_close_file(td, f);
1119
1120                 remove_file_hash(f);
1121
1122                 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
1123                         dprint(FD_FILE, "free unlink %s\n", f->file_name);
1124                         td_io_unlink_file(td, f);
1125                 }
1126
1127                 sfree(f->file_name);
1128                 f->file_name = NULL;
1129                 if (fio_file_axmap(f)) {
1130                         axmap_free(f->io_axmap);
1131                         f->io_axmap = NULL;
1132                 }
1133                 sfree(f);
1134         }
1135
1136         td->o.filename = NULL;
1137         free(td->files);
1138         free(td->file_locks);
1139         td->files_index = 0;
1140         td->files = NULL;
1141         td->file_locks = NULL;
1142         td->o.file_lock_mode = FILE_LOCK_NONE;
1143         td->o.nr_files = 0;
1144 }
1145
1146 static void get_file_type(struct fio_file *f)
1147 {
1148         struct stat sb;
1149
1150         if (!strcmp(f->file_name, "-"))
1151                 f->filetype = FIO_TYPE_PIPE;
1152         else
1153                 f->filetype = FIO_TYPE_FILE;
1154
1155         /* \\.\ is the device namespace in Windows, where every file is
1156          * a block device */
1157         if (strncmp(f->file_name, "\\\\.\\", 4) == 0)
1158                 f->filetype = FIO_TYPE_BD;
1159
1160         if (!stat(f->file_name, &sb)) {
1161                 if (S_ISBLK(sb.st_mode))
1162                         f->filetype = FIO_TYPE_BD;
1163                 else if (S_ISCHR(sb.st_mode))
1164                         f->filetype = FIO_TYPE_CHAR;
1165                 else if (S_ISFIFO(sb.st_mode))
1166                         f->filetype = FIO_TYPE_PIPE;
1167         }
1168 }
1169
1170 static int __is_already_allocated(const char *fname)
1171 {
1172         struct flist_head *entry;
1173         char *filename;
1174
1175         if (flist_empty(&filename_list))
1176                 return 0;
1177
1178         flist_for_each(entry, &filename_list) {
1179                 filename = flist_entry(entry, struct file_name, list)->filename;
1180
1181                 if (strcmp(filename, fname) == 0)
1182                         return 1;
1183         }
1184
1185         return 0;
1186 }
1187
1188 static int is_already_allocated(const char *fname)
1189 {
1190         int ret;
1191
1192         fio_file_hash_lock();
1193         ret = __is_already_allocated(fname);
1194         fio_file_hash_unlock();
1195         return ret;
1196 }
1197
1198 static void set_already_allocated(const char *fname)
1199 {
1200         struct file_name *fn;
1201
1202         fn = malloc(sizeof(struct file_name));
1203         fn->filename = strdup(fname);
1204
1205         fio_file_hash_lock();
1206         if (!__is_already_allocated(fname)) {
1207                 flist_add_tail(&fn->list, &filename_list);
1208                 fn = NULL;
1209         }
1210         fio_file_hash_unlock();
1211
1212         if (fn) {
1213                 free(fn->filename);
1214                 free(fn);
1215         }
1216 }
1217
1218
1219 static void free_already_allocated(void)
1220 {
1221         struct flist_head *entry, *tmp;
1222         struct file_name *fn;
1223
1224         if (flist_empty(&filename_list))
1225                 return;
1226
1227         fio_file_hash_lock();
1228         flist_for_each_safe(entry, tmp, &filename_list) {
1229                 fn = flist_entry(entry, struct file_name, list);
1230                 free(fn->filename);
1231                 flist_del(&fn->list);
1232                 free(fn);
1233         }
1234
1235         fio_file_hash_unlock();
1236 }
1237
1238 static struct fio_file *alloc_new_file(struct thread_data *td)
1239 {
1240         struct fio_file *f;
1241
1242         f = smalloc(sizeof(*f));
1243         if (!f) {
1244                 log_err("fio: smalloc OOM\n");
1245                 assert(0);
1246                 return NULL;
1247         }
1248
1249         f->fd = -1;
1250         f->shadow_fd = -1;
1251         fio_file_reset(td, f);
1252         return f;
1253 }
1254
1255 int add_file(struct thread_data *td, const char *fname, int numjob, int inc)
1256 {
1257         int cur_files = td->files_index;
1258         char file_name[PATH_MAX];
1259         struct fio_file *f;
1260         int len = 0;
1261
1262         dprint(FD_FILE, "add file %s\n", fname);
1263
1264         if (td->o.directory)
1265                 len = set_name_idx(file_name, PATH_MAX, td->o.directory, numjob);
1266
1267         sprintf(file_name + len, "%s", fname);
1268
1269         /* clean cloned siblings using existing files */
1270         if (numjob && is_already_allocated(file_name))
1271                 return 0;
1272
1273         f = alloc_new_file(td);
1274
1275         if (td->files_size <= td->files_index) {
1276                 unsigned int new_size = td->o.nr_files + 1;
1277
1278                 dprint(FD_FILE, "resize file array to %d files\n", new_size);
1279
1280                 td->files = realloc(td->files, new_size * sizeof(f));
1281                 if (td->files == NULL) {
1282                         log_err("fio: realloc OOM\n");
1283                         assert(0);
1284                 }
1285                 if (td->o.file_lock_mode != FILE_LOCK_NONE) {
1286                         td->file_locks = realloc(td->file_locks, new_size);
1287                         if (!td->file_locks) {
1288                                 log_err("fio: realloc OOM\n");
1289                                 assert(0);
1290                         }
1291                         td->file_locks[cur_files] = FILE_LOCK_NONE;
1292                 }
1293                 td->files_size = new_size;
1294         }
1295         td->files[cur_files] = f;
1296         f->fileno = cur_files;
1297
1298         /*
1299          * init function, io engine may not be loaded yet
1300          */
1301         if (td->io_ops && (td->io_ops->flags & FIO_DISKLESSIO))
1302                 f->real_file_size = -1ULL;
1303
1304         f->file_name = smalloc_strdup(file_name);
1305         if (!f->file_name) {
1306                 log_err("fio: smalloc OOM\n");
1307                 assert(0);
1308         }
1309
1310         get_file_type(f);
1311
1312         switch (td->o.file_lock_mode) {
1313         case FILE_LOCK_NONE:
1314                 break;
1315         case FILE_LOCK_READWRITE:
1316                 f->rwlock = fio_rwlock_init();
1317                 break;
1318         case FILE_LOCK_EXCLUSIVE:
1319                 f->lock = fio_mutex_init(FIO_MUTEX_UNLOCKED);
1320                 break;
1321         default:
1322                 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
1323                 assert(0);
1324         }
1325
1326         td->files_index++;
1327         if (f->filetype == FIO_TYPE_FILE)
1328                 td->nr_normal_files++;
1329
1330         set_already_allocated(file_name);
1331
1332         if (inc)
1333                 td->o.nr_files++;
1334
1335         dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name,
1336                                                         cur_files);
1337
1338         return cur_files;
1339 }
1340
1341 int add_file_exclusive(struct thread_data *td, const char *fname)
1342 {
1343         struct fio_file *f;
1344         unsigned int i;
1345
1346         for_each_file(td, f, i) {
1347                 if (!strcmp(f->file_name, fname))
1348                         return i;
1349         }
1350
1351         return add_file(td, fname, 0, 1);
1352 }
1353
1354 void get_file(struct fio_file *f)
1355 {
1356         dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
1357         assert(fio_file_open(f));
1358         f->references++;
1359 }
1360
1361 int put_file(struct thread_data *td, struct fio_file *f)
1362 {
1363         int f_ret = 0, ret = 0;
1364
1365         dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
1366
1367         if (!fio_file_open(f)) {
1368                 assert(f->fd == -1);
1369                 return 0;
1370         }
1371
1372         assert(f->references);
1373         if (--f->references)
1374                 return 0;
1375
1376         if (should_fsync(td) && td->o.fsync_on_close) {
1377                 f_ret = fsync(f->fd);
1378                 if (f_ret < 0)
1379                         f_ret = errno;
1380         }
1381
1382         if (td->io_ops->close_file)
1383                 ret = td->io_ops->close_file(td, f);
1384
1385         if (!ret)
1386                 ret = f_ret;
1387
1388         td->nr_open_files--;
1389         fio_file_clear_open(f);
1390         assert(f->fd == -1);
1391         return ret;
1392 }
1393
1394 void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
1395 {
1396         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1397                 return;
1398
1399         if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
1400                 if (ddir == DDIR_READ)
1401                         fio_rwlock_read(f->rwlock);
1402                 else
1403                         fio_rwlock_write(f->rwlock);
1404         } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1405                 fio_mutex_down(f->lock);
1406
1407         td->file_locks[f->fileno] = td->o.file_lock_mode;
1408 }
1409
1410 void unlock_file(struct thread_data *td, struct fio_file *f)
1411 {
1412         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1413                 return;
1414
1415         if (td->o.file_lock_mode == FILE_LOCK_READWRITE)
1416                 fio_rwlock_unlock(f->rwlock);
1417         else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1418                 fio_mutex_up(f->lock);
1419
1420         td->file_locks[f->fileno] = FILE_LOCK_NONE;
1421 }
1422
1423 void unlock_file_all(struct thread_data *td, struct fio_file *f)
1424 {
1425         if (td->o.file_lock_mode == FILE_LOCK_NONE || !td->file_locks)
1426                 return;
1427         if (td->file_locks[f->fileno] != FILE_LOCK_NONE)
1428                 unlock_file(td, f);
1429 }
1430
1431 static int recurse_dir(struct thread_data *td, const char *dirname)
1432 {
1433         struct dirent *dir;
1434         int ret = 0;
1435         DIR *D;
1436
1437         D = opendir(dirname);
1438         if (!D) {
1439                 char buf[FIO_VERROR_SIZE];
1440
1441                 snprintf(buf, FIO_VERROR_SIZE, "opendir(%s)", dirname);
1442                 td_verror(td, errno, buf);
1443                 return 1;
1444         }
1445
1446         while ((dir = readdir(D)) != NULL) {
1447                 char full_path[PATH_MAX];
1448                 struct stat sb;
1449
1450                 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
1451                         continue;
1452
1453                 sprintf(full_path, "%s%s%s", dirname, FIO_OS_PATH_SEPARATOR, dir->d_name);
1454
1455                 if (lstat(full_path, &sb) == -1) {
1456                         if (errno != ENOENT) {
1457                                 td_verror(td, errno, "stat");
1458                                 ret = 1;
1459                                 break;
1460                         }
1461                 }
1462
1463                 if (S_ISREG(sb.st_mode)) {
1464                         add_file(td, full_path, 0, 1);
1465                         continue;
1466                 }
1467                 if (!S_ISDIR(sb.st_mode))
1468                         continue;
1469
1470                 ret = recurse_dir(td, full_path);
1471                 if (ret)
1472                         break;
1473         }
1474
1475         closedir(D);
1476         return ret;
1477 }
1478
1479 int add_dir_files(struct thread_data *td, const char *path)
1480 {
1481         int ret = recurse_dir(td, path);
1482
1483         if (!ret)
1484                 log_info("fio: opendir added %d files\n", td->o.nr_files);
1485
1486         return ret;
1487 }
1488
1489 void dup_files(struct thread_data *td, struct thread_data *org)
1490 {
1491         struct fio_file *f;
1492         unsigned int i;
1493
1494         dprint(FD_FILE, "dup files: %d\n", org->files_index);
1495
1496         if (!org->files)
1497                 return;
1498
1499         td->files = malloc(org->files_index * sizeof(f));
1500
1501         if (td->o.file_lock_mode != FILE_LOCK_NONE)
1502                 td->file_locks = malloc(org->files_index);
1503
1504         for_each_file(org, f, i) {
1505                 struct fio_file *__f;
1506
1507                 __f = alloc_new_file(td);
1508
1509                 if (f->file_name) {
1510                         __f->file_name = smalloc_strdup(f->file_name);
1511                         if (!__f->file_name) {
1512                                 log_err("fio: smalloc OOM\n");
1513                                 assert(0);
1514                         }
1515
1516                         __f->filetype = f->filetype;
1517                 }
1518
1519                 if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1520                         __f->lock = f->lock;
1521                 else if (td->o.file_lock_mode == FILE_LOCK_READWRITE)
1522                         __f->rwlock = f->rwlock;
1523
1524                 td->files[i] = __f;
1525         }
1526 }
1527
1528 /*
1529  * Returns the index that matches the filename, or -1 if not there
1530  */
1531 int get_fileno(struct thread_data *td, const char *fname)
1532 {
1533         struct fio_file *f;
1534         unsigned int i;
1535
1536         for_each_file(td, f, i)
1537                 if (!strcmp(f->file_name, fname))
1538                         return i;
1539
1540         return -1;
1541 }
1542
1543 /*
1544  * For log usage, where we add/open/close files automatically
1545  */
1546 void free_release_files(struct thread_data *td)
1547 {
1548         close_files(td);
1549         td->o.nr_files = 0;
1550         td->o.open_files = 0;
1551         td->files_index = 0;
1552         td->nr_normal_files = 0;
1553 }
1554
1555 void fio_file_reset(struct thread_data *td, struct fio_file *f)
1556 {
1557         int i;
1558
1559         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1560                 f->last_pos[i] = f->file_offset;
1561                 f->last_start[i] = -1ULL;
1562         }
1563
1564         if (fio_file_axmap(f))
1565                 axmap_reset(f->io_axmap);
1566         else if (fio_file_lfsr(f))
1567                 lfsr_reset(&f->lfsr, td->rand_seeds[FIO_RAND_BLOCK_OFF]);
1568 }
1569
1570 int fio_files_done(struct thread_data *td)
1571 {
1572         struct fio_file *f;
1573         unsigned int i;
1574
1575         for_each_file(td, f, i)
1576                 if (!fio_file_done(f))
1577                         return 0;
1578
1579         return 1;
1580 }
1581
1582 /* free memory used in initialization phase only */
1583 void filesetup_mem_free(void)
1584 {
1585         free_already_allocated();
1586 }