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;
  69         if (td->o.allow_create)
  70                 flags |= O_CREAT;
  71         if (new_layout)
  72                 flags |= O_TRUNC;
  73
  74 #ifdef WIN32
  75         flags |= _O_BINARY;
  76 #endif
  77
  78         dprint(FD_FILE, "open file %s, flags %x\n", f->file_name, flags);
  79         f->fd = open(f->file_name, flags, 0644);
  80         if (f->fd < 0) {
  81                 int err = errno;
  82
  83                 if (err == ENOENT && !td->o.allow_create)
  84                         log_err("fio: file creation disallowed by "
  85                                         "allow_file_create=0\n");
  86                 else
  87                         td_verror(td, err, "open");
  88                 return 1;
  89         }
  90
  91 #ifdef CONFIG_POSIX_FALLOCATE
  92         if (!td->o.fill_device) {
  93                 switch (td->o.fallocate_mode) {
  94                 case FIO_FALLOCATE_NONE:
  95                         break;
  96                 case FIO_FALLOCATE_POSIX:
  97                         dprint(FD_FILE, "posix_fallocate file %s size %llu\n",
  98                                  f->file_name,
  99                                  (unsigned long long) f->real_file_size);
 100
 101                         r = posix_fallocate(f->fd, 0, f->real_file_size);
 102                         if (r > 0) {
 103                                 log_err("fio: posix_fallocate fails: %s\n",
 104                                                 strerror(r));
 105                         }
 106                         break;
 107 #ifdef CONFIG_LINUX_FALLOCATE
 108                 case FIO_FALLOCATE_KEEP_SIZE:
 109                         dprint(FD_FILE,
 110                                 "fallocate(FALLOC_FL_KEEP_SIZE) "
 111                                 "file %s size %llu\n", f->file_name,
 112                                 (unsigned long long) f->real_file_size);
 113
 114                         r = fallocate(f->fd, FALLOC_FL_KEEP_SIZE, 0,
 115                                         f->real_file_size);
 116                         if (r != 0)
 117                                 td_verror(td, errno, "fallocate");
 118
 119                         break;
 120 #endif /* CONFIG_LINUX_FALLOCATE */
 121                 default:
 122                         log_err("fio: unknown fallocate mode: %d\n",
 123                                 td->o.fallocate_mode);
 124                         assert(0);
 125                 }
 126         }
 127 #endif /* CONFIG_POSIX_FALLOCATE */
 128
 129         if (!new_layout)
 130                 goto done;
 131
 132         /*
 133          * The size will be -1ULL when fill_device is used, so don't truncate
 134          * or fallocate this file, just write it
 135          */
 136         if (!td->o.fill_device) {
 137                 dprint(FD_FILE, "truncate file %s, size %llu\n", f->file_name,
 138                                         (unsigned long long) f->real_file_size);
 139                 if (ftruncate(f->fd, f->real_file_size) == -1) {
 140                         if (errno != EFBIG) {
 141                                 td_verror(td, errno, "ftruncate");
 142                                 goto err;
 143                         }
 144                 }
 145         }
 146
 147         b = malloc(td->o.max_bs[DDIR_WRITE]);
 148
 149         left = f->real_file_size;
 150         while (left && !td->terminate) {
 151                 bs = td->o.max_bs[DDIR_WRITE];
 152                 if (bs > left)
 153                         bs = left;
 154
 155                 fill_io_buffer(td, b, bs, bs);
 156
 157                 r = write(f->fd, b, bs);
 158
 159                 if (r > 0) {
 160                         left -= r;
 161                         continue;
 162                 } else {
 163                         if (r < 0) {
 164                                 int __e = errno;
 165
 166                                 if (__e == ENOSPC) {
 167                                         if (td->o.fill_device)
 168                                                 break;
 169                                         log_info("fio: ENOSPC on laying out "
 170                                                  "file, stopping\n");
 171                                         break;
 172                                 }
 173                                 td_verror(td, errno, "write");
 174                         } else
 175                                 td_verror(td, EIO, "write");
 176
 177                         break;
 178                 }
 179         }
 180
 181         if (td->terminate) {
 182                 dprint(FD_FILE, "terminate unlink %s\n", f->file_name);
 183                 td_io_unlink_file(td, f);
 184         } else if (td->o.create_fsync) {
 185                 if (fsync(f->fd) < 0) {
 186                         td_verror(td, errno, "fsync");
 187                         goto err;
 188                 }
 189         }
 190         if (td->o.fill_device && !td_write(td)) {
 191                 fio_file_clear_size_known(f);
 192                 if (td_io_get_file_size(td, f))
 193                         goto err;
 194                 if (f->io_size > f->real_file_size)
 195                         f->io_size = f->real_file_size;
 196         }
 197
 198         free(b);
 199 done:
 200         return 0;
 201 err:
 202         close(f->fd);
 203         f->fd = -1;
 204         if (b)
 205                 free(b);
 206         return 1;
 207 }
 208
 209 static int pre_read_file(struct thread_data *td, struct fio_file *f)
 210 {
 211         int ret = 0, r, did_open = 0, old_runstate;
 212         unsigned long long left;
 213         unsigned int bs;
 214         char *b;
 215
 216         if (td->io_ops->flags & FIO_PIPEIO)
 217                 return 0;
 218
 219         if (!fio_file_open(f)) {
 220                 if (td->io_ops->open_file(td, f)) {
 221                         log_err("fio: cannot pre-read, failed to open file\n");
 222                         return 1;
 223                 }
 224                 did_open = 1;
 225         }
 226
 227         old_runstate = td_bump_runstate(td, TD_PRE_READING);
 228
 229         bs = td->o.max_bs[DDIR_READ];
 230         b = malloc(bs);
 231         memset(b, 0, bs);
 232
 233         if (lseek(f->fd, f->file_offset, SEEK_SET) < 0) {
 234                 td_verror(td, errno, "lseek");
 235                 log_err("fio: failed to lseek pre-read file\n");
 236                 ret = 1;
 237                 goto error;
 238         }
 239
 240         left = f->io_size;
 241
 242         while (left && !td->terminate) {
 243                 if (bs > left)
 244                         bs = left;
 245
 246                 r = read(f->fd, b, bs);
 247
 248                 if (r == (int) bs) {
 249                         left -= bs;
 250                         continue;
 251                 } else {
 252                         td_verror(td, EIO, "pre_read");
 253                         break;
 254                 }
 255         }
 256
 257 error:
 258         td_restore_runstate(td, old_runstate);
 259
 260         if (did_open)
 261                 td->io_ops->close_file(td, f);
 262
 263         free(b);
 264         return ret;
 265 }
 266
 267 static unsigned long long get_rand_file_size(struct thread_data *td)
 268 {
 269         unsigned long long ret, sized;
 270         uint64_t frand_max;
 271         unsigned long r;
 272
 273         frand_max = rand_max(&td->file_size_state);
 274         r = __rand(&td->file_size_state);
 275         sized = td->o.file_size_high - td->o.file_size_low;
 276         ret = (unsigned long long) ((double) sized * (r / (frand_max + 1.0)));
 277         ret += td->o.file_size_low;
 278         ret -= (ret % td->o.rw_min_bs);
 279         return ret;
 280 }
 281
 282 static int file_size(struct thread_data *td, struct fio_file *f)
 283 {
 284         struct stat st;
 285
 286         if (stat(f->file_name, &st) == -1) {
 287                 td_verror(td, errno, "fstat");
 288                 return 1;
 289         }
 290
 291         f->real_file_size = st.st_size;
 292         return 0;
 293 }
 294
 295 static int bdev_size(struct thread_data *td, struct fio_file *f)
 296 {
 297         unsigned long long bytes = 0;
 298         int r;
 299
 300         if (td->io_ops->open_file(td, f)) {
 301                 log_err("fio: failed opening blockdev %s for size check\n",
 302                         f->file_name);
 303                 return 1;
 304         }
 305
 306         r = blockdev_size(f, &bytes);
 307         if (r) {
 308                 td_verror(td, r, "blockdev_size");
 309                 goto err;
 310         }
 311
 312         if (!bytes) {
 313                 log_err("%s: zero sized block device?\n", f->file_name);
 314                 goto err;
 315         }
 316
 317         f->real_file_size = bytes;
 318         td->io_ops->close_file(td, f);
 319         return 0;
 320 err:
 321         td->io_ops->close_file(td, f);
 322         return 1;
 323 }
 324
 325 static int char_size(struct thread_data *td, struct fio_file *f)
 326 {
 327 #ifdef FIO_HAVE_CHARDEV_SIZE
 328         unsigned long long bytes = 0;
 329         int r;
 330
 331         if (td->io_ops->open_file(td, f)) {
 332                 log_err("fio: failed opening blockdev %s for size check\n",
 333                         f->file_name);
 334                 return 1;
 335         }
 336
 337         r = chardev_size(f, &bytes);
 338         if (r) {
 339                 td_verror(td, r, "chardev_size");
 340                 goto err;
 341         }
 342
 343         if (!bytes) {
 344                 log_err("%s: zero sized char device?\n", f->file_name);
 345                 goto err;
 346         }
 347
 348         f->real_file_size = bytes;
 349         td->io_ops->close_file(td, f);
 350         return 0;
 351 err:
 352         td->io_ops->close_file(td, f);
 353         return 1;
 354 #else
 355         f->real_file_size = -1ULL;
 356         return 0;
 357 #endif
 358 }
 359
 360 static int get_file_size(struct thread_data *td, struct fio_file *f)
 361 {
 362         int ret = 0;
 363
 364         if (fio_file_size_known(f))
 365                 return 0;
 366
 367         if (f->filetype == FIO_TYPE_FILE)
 368                 ret = file_size(td, f);
 369         else if (f->filetype == FIO_TYPE_BD)
 370                 ret = bdev_size(td, f);
 371         else if (f->filetype == FIO_TYPE_CHAR)
 372                 ret = char_size(td, f);
 373         else
 374                 f->real_file_size = -1;
 375
 376         if (ret)
 377                 return ret;
 378
 379         if (f->file_offset > f->real_file_size) {
 380                 log_err("%s: offset extends end (%llu > %llu)\n", td->o.name,
 381                                         (unsigned long long) f->file_offset,
 382                                         (unsigned long long) f->real_file_size);
 383                 return 1;
 384         }
 385
 386         fio_file_set_size_known(f);
 387         return 0;
 388 }
 389
 390 static int __file_invalidate_cache(struct thread_data *td, struct fio_file *f,
 391                                    unsigned long long off,
 392                                    unsigned long long len)
 393 {
 394         int ret = 0;
 395
 396 #ifdef CONFIG_ESX
 397         return 0;
 398 #endif
 399
 400         if (len == -1ULL)
 401                 len = f->io_size;
 402         if (off == -1ULL)
 403                 off = f->file_offset;
 404
 405         if (len == -1ULL || off == -1ULL)
 406                 return 0;
 407
 408         dprint(FD_IO, "invalidate cache %s: %llu/%llu\n", f->file_name, off,
 409                                                                 len);
 410
 411         if (td->io_ops->invalidate)
 412                 ret = td->io_ops->invalidate(td, f);
 413         else if (f->filetype == FIO_TYPE_FILE)
 414                 ret = posix_fadvise(f->fd, off, len, POSIX_FADV_DONTNEED);
 415         else if (f->filetype == FIO_TYPE_BD) {
 416                 ret = blockdev_invalidate_cache(f);
 417                 if (ret < 0 && errno == EACCES && geteuid()) {
 418                         if (!root_warn) {
 419                                 log_err("fio: only root may flush block "
 420                                         "devices. Cache flush bypassed!\n");
 421                                 root_warn = 1;
 422                         }
 423                         ret = 0;
 424                 }
 425         } else if (f->filetype == FIO_TYPE_CHAR || f->filetype == FIO_TYPE_PIPE)
 426                 ret = 0;
 427
 428         /*
 429          * Cache flushing isn't a fatal condition, and we know it will
 430          * happen on some platforms where we don't have the proper
 431          * function to flush eg block device caches. So just warn and
 432          * continue on our way.
 433          */
 434         if (ret) {
 435                 log_info("fio: cache invalidation of %s failed: %s\n", f->file_name, strerror(errno));
 436                 ret = 0;
 437         }
 438
 439         return 0;
 440
 441 }
 442
 443 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
 444 {
 445         if (!fio_file_open(f))
 446                 return 0;
 447
 448         return __file_invalidate_cache(td, f, -1ULL, -1ULL);
 449 }
 450
 451 int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
 452 {
 453         int ret = 0;
 454
 455         dprint(FD_FILE, "fd close %s\n", f->file_name);
 456
 457         remove_file_hash(f);
 458
 459         if (close(f->fd) < 0)
 460                 ret = errno;
 461
 462         f->fd = -1;
 463
 464         if (f->shadow_fd != -1) {
 465                 close(f->shadow_fd);
 466                 f->shadow_fd = -1;
 467         }
 468
 469         f->engine_data = 0;
 470         return ret;
 471 }
 472
 473 int file_lookup_open(struct fio_file *f, int flags)
 474 {
 475         struct fio_file *__f;
 476         int from_hash;
 477
 478         __f = lookup_file_hash(f->file_name);
 479         if (__f) {
 480                 dprint(FD_FILE, "found file in hash %s\n", f->file_name);
 481                 /*
 482                  * racy, need the __f->lock locked
 483                  */
 484                 f->lock = __f->lock;
 485                 from_hash = 1;
 486         } else {
 487                 dprint(FD_FILE, "file not found in hash %s\n", f->file_name);
 488                 from_hash = 0;
 489         }
 490
 491 #ifdef WIN32
 492         flags |= _O_BINARY;
 493 #endif
 494
 495         f->fd = open(f->file_name, flags, 0600);
 496         return from_hash;
 497 }
 498
 499 static int file_close_shadow_fds(struct thread_data *td)
 500 {
 501         struct fio_file *f;
 502         int num_closed = 0;
 503         unsigned int i;
 504
 505         for_each_file(td, f, i) {
 506                 if (f->shadow_fd == -1)
 507                         continue;
 508
 509                 close(f->shadow_fd);
 510                 f->shadow_fd = -1;
 511                 num_closed++;
 512         }
 513
 514         return num_closed;
 515 }
 516
 517 int generic_open_file(struct thread_data *td, struct fio_file *f)
 518 {
 519         int is_std = 0;
 520         int flags = 0;
 521         int from_hash = 0;
 522
 523         dprint(FD_FILE, "fd open %s\n", f->file_name);
 524
 525         if (!strcmp(f->file_name, "-")) {
 526                 if (td_rw(td)) {
 527                         log_err("fio: can't read/write to stdin/out\n");
 528                         return 1;
 529                 }
 530                 is_std = 1;
 531
 532                 /*
 533                  * move output logging to stderr, if we are writing to stdout
 534                  */
 535                 if (td_write(td))
 536                         f_out = stderr;
 537         }
 538
 539         if (td_trim(td))
 540                 goto skip_flags;
 541         if (td->o.odirect)
 542                 flags |= OS_O_DIRECT;
 543         if (td->o.oatomic) {
 544                 if (!FIO_O_ATOMIC) {
 545                         td_verror(td, EINVAL, "OS does not support atomic IO");
 546                         return 1;
 547                 }
 548                 flags |= OS_O_DIRECT | FIO_O_ATOMIC;
 549         }
 550         if (td->o.sync_io)
 551                 flags |= O_SYNC;
 552         if (td->o.create_on_open && td->o.allow_create)
 553                 flags |= O_CREAT;
 554 skip_flags:
 555         if (f->filetype != FIO_TYPE_FILE)
 556                 flags |= FIO_O_NOATIME;
 557
 558 open_again:
 559         if (td_write(td)) {
 560                 if (!read_only)
 561                         flags |= O_RDWR;
 562
 563                 if (f->filetype == FIO_TYPE_FILE && td->o.allow_create)
 564                         flags |= O_CREAT;
 565
 566                 if (is_std)
 567                         f->fd = dup(STDOUT_FILENO);
 568                 else
 569                         from_hash = file_lookup_open(f, flags);
 570         } else if (td_read(td)) {
 571                 if (f->filetype == FIO_TYPE_CHAR && !read_only)
 572                         flags |= O_RDWR;
 573                 else
 574                         flags |= O_RDONLY;
 575
 576                 if (is_std)
 577                         f->fd = dup(STDIN_FILENO);
 578                 else
 579                         from_hash = file_lookup_open(f, flags);
 580         } else { //td trim
 581                 flags |= O_RDWR;
 582                 from_hash = file_lookup_open(f, flags);
 583         }
 584
 585         if (f->fd == -1) {
 586                 char buf[FIO_VERROR_SIZE];
 587                 int __e = errno;
 588
 589                 if (__e == EPERM && (flags & FIO_O_NOATIME)) {
 590                         flags &= ~FIO_O_NOATIME;
 591                         goto open_again;
 592                 }
 593                 if (__e == EMFILE && file_close_shadow_fds(td))
 594                         goto open_again;
 595
 596                 snprintf(buf, sizeof(buf), "open(%s)", f->file_name);
 597
 598                 if (__e == EINVAL && (flags & OS_O_DIRECT)) {
 599                         log_err("fio: looks like your file system does not " \
 600                                 "support direct=1/buffered=0\n");
 601                 }
 602
 603                 td_verror(td, __e, buf);
 604                 return 1;
 605         }
 606
 607         if (!from_hash && f->fd != -1) {
 608                 if (add_file_hash(f)) {
 609                         int fio_unused ret;
 610
 611                         /*
 612                          * Stash away descriptor for later close. This is to
 613                          * work-around a "feature" on Linux, where a close of
 614                          * an fd that has been opened for write will trigger
 615                          * udev to call blkid to check partitions, fs id, etc.
 616                          * That pollutes the device cache, which can slow down
 617                          * unbuffered accesses.
 618                          */
 619                         if (f->shadow_fd == -1)
 620                                 f->shadow_fd = f->fd;
 621                         else {
 622                                 /*
 623                                  * OK to ignore, we haven't done anything
 624                                  * with it
 625                                  */
 626                                 ret = generic_close_file(td, f);
 627                         }
 628                         goto open_again;
 629                 }
 630         }
 631
 632         return 0;
 633 }
 634
 635 int generic_get_file_size(struct thread_data *td, struct fio_file *f)
 636 {
 637         return get_file_size(td, f);
 638 }
 639
 640 /*
 641  * open/close all files, so that ->real_file_size gets set
 642  */
 643 static int get_file_sizes(struct thread_data *td)
 644 {
 645         struct fio_file *f;
 646         unsigned int i;
 647         int err = 0;
 648
 649         for_each_file(td, f, i) {
 650                 dprint(FD_FILE, "get file size for %p/%d/%p\n", f, i,
 651                                                                 f->file_name);
 652
 653                 if (td_io_get_file_size(td, f)) {
 654                         if (td->error != ENOENT) {
 655                                 log_err("%s\n", td->verror);
 656                                 err = 1;
 657                                 break;
 658                         }
 659                         clear_error(td);
 660                 }
 661
 662                 if (f->real_file_size == -1ULL && td->o.size)
 663                         f->real_file_size = td->o.size / td->o.nr_files;
 664         }
 665
 666         return err;
 667 }
 668
 669 struct fio_mount {
 670         struct flist_head list;
 671         const char *base;
 672         char __base[256];
 673         unsigned int key;
 674 };
 675
 676 /*
 677  * Get free number of bytes for each file on each unique mount.
 678  */
 679 static unsigned long long get_fs_free_counts(struct thread_data *td)
 680 {
 681         struct flist_head *n, *tmp;
 682         unsigned long long ret = 0;
 683         struct fio_mount *fm;
 684         FLIST_HEAD(list);
 685         struct fio_file *f;
 686         unsigned int i;
 687
 688         for_each_file(td, f, i) {
 689                 struct stat sb;
 690                 char buf[256];
 691
 692                 if (f->filetype == FIO_TYPE_BD || f->filetype == FIO_TYPE_CHAR) {
 693                         if (f->real_file_size != -1ULL)
 694                                 ret += f->real_file_size;
 695                         continue;
 696                 } else if (f->filetype != FIO_TYPE_FILE)
 697                         continue;
 698
 699                 buf[255] = '\0';
 700                 strncpy(buf, f->file_name, 255);
 701
 702                 if (stat(buf, &sb) < 0) {
 703                         if (errno != ENOENT)
 704                                 break;
 705                         strcpy(buf, ".");
 706                         if (stat(buf, &sb) < 0)
 707                                 break;
 708                 }
 709
 710                 fm = NULL;
 711                 flist_for_each(n, &list) {
 712                         fm = flist_entry(n, struct fio_mount, list);
 713                         if (fm->key == sb.st_dev)
 714                                 break;
 715
 716                         fm = NULL;
 717                 }
 718
 719                 if (fm)
 720                         continue;
 721
 722                 fm = calloc(1, sizeof(*fm));
 723                 strncpy(fm->__base, buf, sizeof(fm->__base) - 1);
 724                 fm->base = basename(fm->__base);
 725                 fm->key = sb.st_dev;
 726                 flist_add(&fm->list, &list);
 727         }
 728
 729         flist_for_each_safe(n, tmp, &list) {
 730                 unsigned long long sz;
 731
 732                 fm = flist_entry(n, struct fio_mount, list);
 733                 flist_del(&fm->list);
 734
 735                 sz = get_fs_free_size(fm->base);
 736                 if (sz && sz != -1ULL)
 737                         ret += sz;
 738
 739                 free(fm);
 740         }
 741
 742         return ret;
 743 }
 744
 745 uint64_t get_start_offset(struct thread_data *td, struct fio_file *f)
 746 {
 747         struct thread_options *o = &td->o;
 748
 749         if (o->file_append && f->filetype == FIO_TYPE_FILE)
 750                 return f->real_file_size;
 751
 752         return td->o.start_offset +
 753                 td->subjob_number * td->o.offset_increment;
 754 }
 755
 756 /*
 757  * Open the files and setup files sizes, creating files if necessary.
 758  */
 759 int setup_files(struct thread_data *td)
 760 {
 761         unsigned long long total_size, extend_size;
 762         struct thread_options *o = &td->o;
 763         struct fio_file *f;
 764         unsigned int i, nr_fs_extra = 0;
 765         int err = 0, need_extend;
 766         int old_state;
 767         const unsigned int bs = td_min_bs(td);
 768         uint64_t fs = 0;
 769
 770         dprint(FD_FILE, "setup files\n");
 771
 772         old_state = td_bump_runstate(td, TD_SETTING_UP);
 773
 774         if (o->read_iolog_file)
 775                 goto done;
 776
 777         /*
 778          * if ioengine defines a setup() method, it's responsible for
 779          * opening the files and setting f->real_file_size to indicate
 780          * the valid range for that file.
 781          */
 782         if (td->io_ops->setup)
 783                 err = td->io_ops->setup(td);
 784         else
 785                 err = get_file_sizes(td);
 786
 787         if (err)
 788                 goto err_out;
 789
 790         /*
 791          * check sizes. if the files/devices do not exist and the size
 792          * isn't passed to fio, abort.
 793          */
 794         total_size = 0;
 795         for_each_file(td, f, i) {
 796                 if (f->real_file_size == -1ULL)
 797                         total_size = -1ULL;
 798                 else
 799                         total_size += f->real_file_size;
 800         }
 801
 802         if (o->fill_device)
 803                 td->fill_device_size = get_fs_free_counts(td);
 804
 805         /*
 806          * device/file sizes are zero and no size given, punt
 807          */
 808         if ((!total_size || total_size == -1ULL) && !o->size &&
 809             !(td->io_ops->flags & FIO_NOIO) && !o->fill_device &&
 810             !(o->nr_files && (o->file_size_low || o->file_size_high))) {
 811                 log_err("%s: you need to specify size=\n", o->name);
 812                 td_verror(td, EINVAL, "total_file_size");
 813                 goto err_out;
 814         }
 815
 816         /*
 817          * Calculate per-file size and potential extra size for the
 818          * first files, if needed.
 819          */
 820         if (!o->file_size_low && o->nr_files) {
 821                 uint64_t all_fs;
 822
 823                 fs = o->size / o->nr_files;
 824                 all_fs = fs * o->nr_files;
 825
 826                 if (all_fs < o->size)
 827                         nr_fs_extra = (o->size - all_fs) / bs;
 828         }
 829
 830         /*
 831          * now file sizes are known, so we can set ->io_size. if size= is
 832          * not given, ->io_size is just equal to ->real_file_size. if size
 833          * is given, ->io_size is size / nr_files.
 834          */
 835         extend_size = total_size = 0;
 836         need_extend = 0;
 837         for_each_file(td, f, i) {
 838                 f->file_offset = get_start_offset(td, f);
 839
 840                 if (!o->file_size_low) {
 841                         /*
 842                          * no file size range given, file size is equal to
 843                          * total size divided by number of files. If that is
 844                          * zero, set it to the real file size. If the size
 845                          * doesn't divide nicely with the min blocksize,
 846                          * make the first files bigger.
 847                          */
 848                         f->io_size = fs;
 849                         if (nr_fs_extra) {
 850                                 nr_fs_extra--;
 851                                 f->io_size += bs;
 852                         }
 853
 854                         if (!f->io_size)
 855                                 f->io_size = f->real_file_size - f->file_offset;
 856                 } else if (f->real_file_size < o->file_size_low ||
 857                            f->real_file_size > o->file_size_high) {
 858                         if (f->file_offset > o->file_size_low)
 859                                 goto err_offset;
 860                         /*
 861                          * file size given. if it's fixed, use that. if it's a
 862                          * range, generate a random size in-between.
 863                          */
 864                         if (o->file_size_low == o->file_size_high)
 865                                 f->io_size = o->file_size_low - f->file_offset;
 866                         else {
 867                                 f->io_size = get_rand_file_size(td)
 868                                                 - f->file_offset;
 869                         }
 870                 } else
 871                         f->io_size = f->real_file_size - f->file_offset;
 872
 873                 if (f->io_size == -1ULL)
 874                         total_size = -1ULL;
 875                 else {
 876                         if (o->size_percent)
 877                                 f->io_size = (f->io_size * o->size_percent) / 100;
 878                         total_size += f->io_size;
 879                 }
 880
 881                 if (f->filetype == FIO_TYPE_FILE &&
 882                     (f->io_size + f->file_offset) > f->real_file_size &&
 883                     !(td->io_ops->flags & FIO_DISKLESSIO)) {
 884                         if (!o->create_on_open) {
 885                                 need_extend++;
 886                                 extend_size += (f->io_size + f->file_offset);
 887                         } else
 888                                 f->real_file_size = f->io_size + f->file_offset;
 889                         fio_file_set_extend(f);
 890                 }
 891         }
 892
 893         if (td->o.block_error_hist) {
 894                 int len;
 895
 896                 assert(td->o.nr_files == 1);    /* checked in fixup_options */
 897                 f = td->files[0];
 898                 len = f->io_size / td->o.bs[DDIR_TRIM];
 899                 if (len > MAX_NR_BLOCK_INFOS || len <= 0) {
 900                         log_err("fio: cannot calculate block histogram with "
 901                                 "%d trim blocks, maximum %d\n",
 902                                 len, MAX_NR_BLOCK_INFOS);
 903                         td_verror(td, EINVAL, "block_error_hist");
 904                         goto err_out;
 905                 }
 906
 907                 td->ts.nr_block_infos = len;
 908                 for (int i = 0; i < len; i++)
 909                         td->ts.block_infos[i] =
 910                                 BLOCK_INFO(0, BLOCK_STATE_UNINIT);
 911         } else
 912                 td->ts.nr_block_infos = 0;
 913
 914         if (!o->size || (total_size && o->size > total_size))
 915                 o->size = total_size;
 916
 917         if (o->size < td_min_bs(td)) {
 918                 log_err("fio: blocksize too large for data set\n");
 919                 goto err_out;
 920         }
 921
 922         /*
 923          * See if we need to extend some files
 924          */
 925         if (need_extend) {
 926                 temp_stall_ts = 1;
 927                 if (output_format == FIO_OUTPUT_NORMAL)
 928                         log_info("%s: Laying out IO file(s) (%u file(s) /"
 929                                  " %lluMB)\n", o->name, need_extend,
 930                                         extend_size >> 20);
 931
 932                 for_each_file(td, f, i) {
 933                         unsigned long long old_len = -1ULL, extend_len = -1ULL;
 934
 935                         if (!fio_file_extend(f))
 936                                 continue;
 937
 938                         assert(f->filetype == FIO_TYPE_FILE);
 939                         fio_file_clear_extend(f);
 940                         if (!o->fill_device) {
 941                                 old_len = f->real_file_size;
 942                                 extend_len = f->io_size + f->file_offset -
 943                                                 old_len;
 944                         }
 945                         f->real_file_size = (f->io_size + f->file_offset);
 946                         err = extend_file(td, f);
 947                         if (err)
 948                                 break;
 949
 950                         err = __file_invalidate_cache(td, f, old_len,
 951                                                                 extend_len);
 952
 953                         /*
 954                          * Shut up static checker
 955                          */
 956                         if (f->fd != -1)
 957                                 close(f->fd);
 958
 959                         f->fd = -1;
 960                         if (err)
 961                                 break;
 962                 }
 963                 temp_stall_ts = 0;
 964         }
 965
 966         if (err)
 967                 goto err_out;
 968
 969         if (!o->zone_size)
 970                 o->zone_size = o->size;
 971
 972         /*
 973          * iolog already set the total io size, if we read back
 974          * stored entries.
 975          */
 976         if (!o->read_iolog_file) {
 977                 if (o->io_limit)
 978                         td->total_io_size = o->io_limit * o->loops;
 979                 else
 980                         td->total_io_size = o->size * o->loops;
 981         }
 982
 983 done:
 984         if (o->create_only)
 985                 td->done = 1;
 986
 987         td_restore_runstate(td, old_state);
 988         return 0;
 989 err_offset:
 990         log_err("%s: you need to specify valid offset=\n", o->name);
 991 err_out:
 992         td_restore_runstate(td, old_state);
 993         return 1;
 994 }
 995
 996 int pre_read_files(struct thread_data *td)
 997 {
 998         struct fio_file *f;
 999         unsigned int i;
1000
1001         dprint(FD_FILE, "pre_read files\n");
1002
1003         for_each_file(td, f, i) {
1004                 pre_read_file(td, f);
1005         }
1006
1007         return 1;
1008 }
1009
1010 static int __init_rand_distribution(struct thread_data *td, struct fio_file *f)
1011 {
1012         unsigned int range_size, seed;
1013         unsigned long nranges;
1014         uint64_t fsize;
1015
1016         range_size = min(td->o.min_bs[DDIR_READ], td->o.min_bs[DDIR_WRITE]);
1017         fsize = min(f->real_file_size, f->io_size);
1018
1019         nranges = (fsize + range_size - 1) / range_size;
1020
1021         seed = jhash(f->file_name, strlen(f->file_name), 0) * td->thread_number;
1022         if (!td->o.rand_repeatable)
1023                 seed = td->rand_seeds[4];
1024
1025         if (td->o.random_distribution == FIO_RAND_DIST_ZIPF)
1026                 zipf_init(&f->zipf, nranges, td->o.zipf_theta.u.f, seed);
1027         else if (td->o.random_distribution == FIO_RAND_DIST_PARETO)
1028                 pareto_init(&f->zipf, nranges, td->o.pareto_h.u.f, seed);
1029         else if (td->o.random_distribution == FIO_RAND_DIST_GAUSS)
1030                 gauss_init(&f->gauss, nranges, td->o.gauss_dev.u.f, seed);
1031
1032         return 1;
1033 }
1034
1035 static int init_rand_distribution(struct thread_data *td)
1036 {
1037         struct fio_file *f;
1038         unsigned int i;
1039         int state;
1040
1041         if (td->o.random_distribution == FIO_RAND_DIST_RANDOM)
1042                 return 0;
1043
1044         state = td_bump_runstate(td, TD_SETTING_UP);
1045
1046         for_each_file(td, f, i)
1047                 __init_rand_distribution(td, f);
1048
1049         td_restore_runstate(td, state);
1050
1051         return 1;
1052 }
1053
1054 /*
1055  * Check if the number of blocks exceeds the randomness capability of
1056  * the selected generator. Tausworthe is 32-bit, the others are fullly
1057  * 64-bit capable.
1058  */
1059 static int check_rand_gen_limits(struct thread_data *td, struct fio_file *f,
1060                                  uint64_t blocks)
1061 {
1062         if (blocks <= FRAND32_MAX)
1063                 return 0;
1064         if (td->o.random_generator != FIO_RAND_GEN_TAUSWORTHE)
1065                 return 0;
1066
1067         /*
1068          * If the user hasn't specified a random generator, switch
1069          * to tausworthe64 with informational warning. If the user did
1070          * specify one, just warn.
1071          */
1072         log_info("fio: file %s exceeds 32-bit tausworthe random generator.\n",
1073                         f->file_name);
1074
1075         if (!fio_option_is_set(&td->o, random_generator)) {
1076                 log_info("fio: Switching to tausworthe64. Use the "
1077                          "random_generator= option to get rid of this "
1078                          " warning.\n");
1079                 td->o.random_generator = FIO_RAND_GEN_TAUSWORTHE64;
1080                 return 0;
1081         }
1082
1083         /*
1084          * Just make this information to avoid breaking scripts.
1085          */
1086         log_info("fio: Use the random_generator= option to switch to lfsr or "
1087                          "tausworthe64.\n");
1088         return 0;
1089 }
1090
1091 int init_random_map(struct thread_data *td)
1092 {
1093         unsigned long long blocks;
1094         struct fio_file *f;
1095         unsigned int i;
1096
1097         if (init_rand_distribution(td))
1098                 return 0;
1099         if (!td_random(td))
1100                 return 0;
1101
1102         for_each_file(td, f, i) {
1103                 uint64_t fsize = min(f->real_file_size, f->io_size);
1104
1105                 blocks = fsize / (unsigned long long) td->o.rw_min_bs;
1106
1107                 if (check_rand_gen_limits(td, f, blocks))
1108                         return 1;
1109
1110                 if (td->o.random_generator == FIO_RAND_GEN_LFSR) {
1111                         unsigned long seed;
1112
1113                         seed = td->rand_seeds[FIO_RAND_BLOCK_OFF];
1114
1115                         if (!lfsr_init(&f->lfsr, blocks, seed, 0)) {
1116                                 fio_file_set_lfsr(f);
1117                                 continue;
1118                         }
1119                 } else if (!td->o.norandommap) {
1120                         f->io_axmap = axmap_new(blocks);
1121                         if (f->io_axmap) {
1122                                 fio_file_set_axmap(f);
1123                                 continue;
1124                         }
1125                 } else if (td->o.norandommap)
1126                         continue;
1127
1128                 if (!td->o.softrandommap) {
1129                         log_err("fio: failed allocating random map. If running"
1130                                 " a large number of jobs, try the 'norandommap'"
1131                                 " option or set 'softrandommap'. Or give"
1132                                 " a larger --alloc-size to fio.\n");
1133                         return 1;
1134                 }
1135
1136                 log_info("fio: file %s failed allocating random map. Running "
1137                          "job without.\n", f->file_name);
1138         }
1139
1140         return 0;
1141 }
1142
1143 void close_files(struct thread_data *td)
1144 {
1145         struct fio_file *f;
1146         unsigned int i;
1147
1148         for_each_file(td, f, i) {
1149                 if (fio_file_open(f))
1150                         td_io_close_file(td, f);
1151         }
1152 }
1153
1154 void close_and_free_files(struct thread_data *td)
1155 {
1156         struct fio_file *f;
1157         unsigned int i;
1158
1159         dprint(FD_FILE, "close files\n");
1160
1161         for_each_file(td, f, i) {
1162                 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
1163                         dprint(FD_FILE, "free unlink %s\n", f->file_name);
1164                         td_io_unlink_file(td, f);
1165                 }
1166
1167                 if (fio_file_open(f))
1168                         td_io_close_file(td, f);
1169
1170                 remove_file_hash(f);
1171
1172                 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
1173                         dprint(FD_FILE, "free unlink %s\n", f->file_name);
1174                         td_io_unlink_file(td, f);
1175                 }
1176
1177                 sfree(f->file_name);
1178                 f->file_name = NULL;
1179                 if (fio_file_axmap(f)) {
1180                         axmap_free(f->io_axmap);
1181                         f->io_axmap = NULL;
1182                 }
1183                 sfree(f);
1184         }
1185
1186         td->o.filename = NULL;
1187         free(td->files);
1188         free(td->file_locks);
1189         td->files_index = 0;
1190         td->files = NULL;
1191         td->file_locks = NULL;
1192         td->o.file_lock_mode = FILE_LOCK_NONE;
1193         td->o.nr_files = 0;
1194 }
1195
1196 static void get_file_type(struct fio_file *f)
1197 {
1198         struct stat sb;
1199
1200         if (!strcmp(f->file_name, "-"))
1201                 f->filetype = FIO_TYPE_PIPE;
1202         else
1203                 f->filetype = FIO_TYPE_FILE;
1204
1205         /* \\.\ is the device namespace in Windows, where every file is
1206          * a block device */
1207         if (strncmp(f->file_name, "\\\\.\\", 4) == 0)
1208                 f->filetype = FIO_TYPE_BD;
1209
1210         if (!stat(f->file_name, &sb)) {
1211                 if (S_ISBLK(sb.st_mode))
1212                         f->filetype = FIO_TYPE_BD;
1213                 else if (S_ISCHR(sb.st_mode))
1214                         f->filetype = FIO_TYPE_CHAR;
1215                 else if (S_ISFIFO(sb.st_mode))
1216                         f->filetype = FIO_TYPE_PIPE;
1217         }
1218 }
1219
1220 static int __is_already_allocated(const char *fname)
1221 {
1222         struct flist_head *entry;
1223         char *filename;
1224
1225         if (flist_empty(&filename_list))
1226                 return 0;
1227
1228         flist_for_each(entry, &filename_list) {
1229                 filename = flist_entry(entry, struct file_name, list)->filename;
1230
1231                 if (strcmp(filename, fname) == 0)
1232                         return 1;
1233         }
1234
1235         return 0;
1236 }
1237
1238 static int is_already_allocated(const char *fname)
1239 {
1240         int ret;
1241
1242         fio_file_hash_lock();
1243         ret = __is_already_allocated(fname);
1244         fio_file_hash_unlock();
1245         return ret;
1246 }
1247
1248 static void set_already_allocated(const char *fname)
1249 {
1250         struct file_name *fn;
1251
1252         fn = malloc(sizeof(struct file_name));
1253         fn->filename = strdup(fname);
1254
1255         fio_file_hash_lock();
1256         if (!__is_already_allocated(fname)) {
1257                 flist_add_tail(&fn->list, &filename_list);
1258                 fn = NULL;
1259         }
1260         fio_file_hash_unlock();
1261
1262         if (fn) {
1263                 free(fn->filename);
1264                 free(fn);
1265         }
1266 }
1267
1268
1269 static void free_already_allocated(void)
1270 {
1271         struct flist_head *entry, *tmp;
1272         struct file_name *fn;
1273
1274         if (flist_empty(&filename_list))
1275                 return;
1276
1277         fio_file_hash_lock();
1278         flist_for_each_safe(entry, tmp, &filename_list) {
1279                 fn = flist_entry(entry, struct file_name, list);
1280                 free(fn->filename);
1281                 flist_del(&fn->list);
1282                 free(fn);
1283         }
1284
1285         fio_file_hash_unlock();
1286 }
1287
1288 static struct fio_file *alloc_new_file(struct thread_data *td)
1289 {
1290         struct fio_file *f;
1291
1292         f = smalloc(sizeof(*f));
1293         if (!f) {
1294                 log_err("fio: smalloc OOM\n");
1295                 assert(0);
1296                 return NULL;
1297         }
1298
1299         f->fd = -1;
1300         f->shadow_fd = -1;
1301         fio_file_reset(td, f);
1302         return f;
1303 }
1304
1305 int add_file(struct thread_data *td, const char *fname, int numjob, int inc)
1306 {
1307         int cur_files = td->files_index;
1308         char file_name[PATH_MAX];
1309         struct fio_file *f;
1310         int len = 0;
1311
1312         dprint(FD_FILE, "add file %s\n", fname);
1313
1314         if (td->o.directory)
1315                 len = set_name_idx(file_name, PATH_MAX, td->o.directory, numjob);
1316
1317         sprintf(file_name + len, "%s", fname);
1318
1319         /* clean cloned siblings using existing files */
1320         if (numjob && is_already_allocated(file_name))
1321                 return 0;
1322
1323         f = alloc_new_file(td);
1324
1325         if (td->files_size <= td->files_index) {
1326                 unsigned int new_size = td->o.nr_files + 1;
1327
1328                 dprint(FD_FILE, "resize file array to %d files\n", new_size);
1329
1330                 td->files = realloc(td->files, new_size * sizeof(f));
1331                 if (td->files == NULL) {
1332                         log_err("fio: realloc OOM\n");
1333                         assert(0);
1334                 }
1335                 if (td->o.file_lock_mode != FILE_LOCK_NONE) {
1336                         td->file_locks = realloc(td->file_locks, new_size);
1337                         if (!td->file_locks) {
1338                                 log_err("fio: realloc OOM\n");
1339                                 assert(0);
1340                         }
1341                         td->file_locks[cur_files] = FILE_LOCK_NONE;
1342                 }
1343                 td->files_size = new_size;
1344         }
1345         td->files[cur_files] = f;
1346         f->fileno = cur_files;
1347
1348         /*
1349          * init function, io engine may not be loaded yet
1350          */
1351         if (td->io_ops && (td->io_ops->flags & FIO_DISKLESSIO))
1352                 f->real_file_size = -1ULL;
1353
1354         f->file_name = smalloc_strdup(file_name);
1355         if (!f->file_name) {
1356                 log_err("fio: smalloc OOM\n");
1357                 assert(0);
1358         }
1359
1360         get_file_type(f);
1361
1362         switch (td->o.file_lock_mode) {
1363         case FILE_LOCK_NONE:
1364                 break;
1365         case FILE_LOCK_READWRITE:
1366                 f->rwlock = fio_rwlock_init();
1367                 break;
1368         case FILE_LOCK_EXCLUSIVE:
1369                 f->lock = fio_mutex_init(FIO_MUTEX_UNLOCKED);
1370                 break;
1371         default:
1372                 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
1373                 assert(0);
1374         }
1375
1376         td->files_index++;
1377         if (f->filetype == FIO_TYPE_FILE)
1378                 td->nr_normal_files++;
1379
1380         set_already_allocated(file_name);
1381
1382         if (inc)
1383                 td->o.nr_files++;
1384
1385         dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name,
1386                                                         cur_files);
1387
1388         return cur_files;
1389 }
1390
1391 int add_file_exclusive(struct thread_data *td, const char *fname)
1392 {
1393         struct fio_file *f;
1394         unsigned int i;
1395
1396         for_each_file(td, f, i) {
1397                 if (!strcmp(f->file_name, fname))
1398                         return i;
1399         }
1400
1401         return add_file(td, fname, 0, 1);
1402 }
1403
1404 void get_file(struct fio_file *f)
1405 {
1406         dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
1407         assert(fio_file_open(f));
1408         f->references++;
1409 }
1410
1411 int put_file(struct thread_data *td, struct fio_file *f)
1412 {
1413         int f_ret = 0, ret = 0;
1414
1415         dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
1416
1417         if (!fio_file_open(f)) {
1418                 assert(f->fd == -1);
1419                 return 0;
1420         }
1421
1422         assert(f->references);
1423         if (--f->references)
1424                 return 0;
1425
1426         if (should_fsync(td) && td->o.fsync_on_close) {
1427                 f_ret = fsync(f->fd);
1428                 if (f_ret < 0)
1429                         f_ret = errno;
1430         }
1431
1432         if (td->io_ops->close_file)
1433                 ret = td->io_ops->close_file(td, f);
1434
1435         if (!ret)
1436                 ret = f_ret;
1437
1438         td->nr_open_files--;
1439         fio_file_clear_open(f);
1440         assert(f->fd == -1);
1441         return ret;
1442 }
1443
1444 void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
1445 {
1446         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1447                 return;
1448
1449         if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
1450                 if (ddir == DDIR_READ)
1451                         fio_rwlock_read(f->rwlock);
1452                 else
1453                         fio_rwlock_write(f->rwlock);
1454         } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1455                 fio_mutex_down(f->lock);
1456
1457         td->file_locks[f->fileno] = td->o.file_lock_mode;
1458 }
1459
1460 void unlock_file(struct thread_data *td, struct fio_file *f)
1461 {
1462         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1463                 return;
1464
1465         if (td->o.file_lock_mode == FILE_LOCK_READWRITE)
1466                 fio_rwlock_unlock(f->rwlock);
1467         else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1468                 fio_mutex_up(f->lock);
1469
1470         td->file_locks[f->fileno] = FILE_LOCK_NONE;
1471 }
1472
1473 void unlock_file_all(struct thread_data *td, struct fio_file *f)
1474 {
1475         if (td->o.file_lock_mode == FILE_LOCK_NONE || !td->file_locks)
1476                 return;
1477         if (td->file_locks[f->fileno] != FILE_LOCK_NONE)
1478                 unlock_file(td, f);
1479 }
1480
1481 static int recurse_dir(struct thread_data *td, const char *dirname)
1482 {
1483         struct dirent *dir;
1484         int ret = 0;
1485         DIR *D;
1486
1487         D = opendir(dirname);
1488         if (!D) {
1489                 char buf[FIO_VERROR_SIZE];
1490
1491                 snprintf(buf, FIO_VERROR_SIZE, "opendir(%s)", dirname);
1492                 td_verror(td, errno, buf);
1493                 return 1;
1494         }
1495
1496         while ((dir = readdir(D)) != NULL) {
1497                 char full_path[PATH_MAX];
1498                 struct stat sb;
1499
1500                 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
1501                         continue;
1502
1503                 sprintf(full_path, "%s%s%s", dirname, FIO_OS_PATH_SEPARATOR, dir->d_name);
1504
1505                 if (lstat(full_path, &sb) == -1) {
1506                         if (errno != ENOENT) {
1507                                 td_verror(td, errno, "stat");
1508                                 ret = 1;
1509                                 break;
1510                         }
1511                 }
1512
1513                 if (S_ISREG(sb.st_mode)) {
1514                         add_file(td, full_path, 0, 1);
1515                         continue;
1516                 }
1517                 if (!S_ISDIR(sb.st_mode))
1518                         continue;
1519
1520                 ret = recurse_dir(td, full_path);
1521                 if (ret)
1522                         break;
1523         }
1524
1525         closedir(D);
1526         return ret;
1527 }
1528
1529 int add_dir_files(struct thread_data *td, const char *path)
1530 {
1531         int ret = recurse_dir(td, path);
1532
1533         if (!ret)
1534                 log_info("fio: opendir added %d files\n", td->o.nr_files);
1535
1536         return ret;
1537 }
1538
1539 void dup_files(struct thread_data *td, struct thread_data *org)
1540 {
1541         struct fio_file *f;
1542         unsigned int i;
1543
1544         dprint(FD_FILE, "dup files: %d\n", org->files_index);
1545
1546         if (!org->files)
1547                 return;
1548
1549         td->files = malloc(org->files_index * sizeof(f));
1550
1551         if (td->o.file_lock_mode != FILE_LOCK_NONE)
1552                 td->file_locks = malloc(org->files_index);
1553
1554         for_each_file(org, f, i) {
1555                 struct fio_file *__f;
1556
1557                 __f = alloc_new_file(td);
1558
1559                 if (f->file_name) {
1560                         __f->file_name = smalloc_strdup(f->file_name);
1561                         if (!__f->file_name) {
1562                                 log_err("fio: smalloc OOM\n");
1563                                 assert(0);
1564                         }
1565
1566                         __f->filetype = f->filetype;
1567                 }
1568
1569                 if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1570                         __f->lock = f->lock;
1571                 else if (td->o.file_lock_mode == FILE_LOCK_READWRITE)
1572                         __f->rwlock = f->rwlock;
1573
1574                 td->files[i] = __f;
1575         }
1576 }
1577
1578 /*
1579  * Returns the index that matches the filename, or -1 if not there
1580  */
1581 int get_fileno(struct thread_data *td, const char *fname)
1582 {
1583         struct fio_file *f;
1584         unsigned int i;
1585
1586         for_each_file(td, f, i)
1587                 if (!strcmp(f->file_name, fname))
1588                         return i;
1589
1590         return -1;
1591 }
1592
1593 /*
1594  * For log usage, where we add/open/close files automatically
1595  */
1596 void free_release_files(struct thread_data *td)
1597 {
1598         close_files(td);
1599         td->o.nr_files = 0;
1600         td->o.open_files = 0;
1601         td->files_index = 0;
1602         td->nr_normal_files = 0;
1603 }
1604
1605 void fio_file_reset(struct thread_data *td, struct fio_file *f)
1606 {
1607         int i;
1608
1609         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1610                 f->last_pos[i] = f->file_offset;
1611                 f->last_start[i] = -1ULL;
1612         }
1613
1614         if (fio_file_axmap(f))
1615                 axmap_reset(f->io_axmap);
1616         else if (fio_file_lfsr(f))
1617                 lfsr_reset(&f->lfsr, td->rand_seeds[FIO_RAND_BLOCK_OFF]);
1618 }
1619
1620 int fio_files_done(struct thread_data *td)
1621 {
1622         struct fio_file *f;
1623         unsigned int i;
1624
1625         for_each_file(td, f, i)
1626                 if (!fio_file_done(f))
1627                         return 0;
1628
1629         return 1;
1630 }
1631
1632 /* free memory used in initialization phase only */
1633 void filesetup_mem_free(void)
1634 {
1635         free_already_allocated();
1636 }