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_ioengine_flagged(td, 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                 int ret;
  62
  63                 dprint(FD_FILE, "layout unlink %s\n", f->file_name);
  64
  65                 ret = td_io_unlink_file(td, f);
  66                 if (ret != 0 && ret != ENOENT) {
  67                         td_verror(td, errno, "unlink");
  68                         return 1;
  69                 }
  70         }
  71
  72         flags = O_WRONLY;
  73         if (td->o.allow_create)
  74                 flags |= O_CREAT;
  75         if (new_layout)
  76                 flags |= O_TRUNC;
  77
  78 #ifdef WIN32
  79         flags |= _O_BINARY;
  80 #endif
  81
  82         dprint(FD_FILE, "open file %s, flags %x\n", f->file_name, flags);
  83         f->fd = open(f->file_name, flags, 0644);
  84         if (f->fd < 0) {
  85                 int err = errno;
  86
  87                 if (err == ENOENT && !td->o.allow_create)
  88                         log_err("fio: file creation disallowed by "
  89                                         "allow_file_create=0\n");
  90                 else
  91                         td_verror(td, err, "open");
  92                 return 1;
  93         }
  94
  95 #ifdef CONFIG_POSIX_FALLOCATE
  96         if (!td->o.fill_device) {
  97                 switch (td->o.fallocate_mode) {
  98                 case FIO_FALLOCATE_NONE:
  99                         break;
 100                 case FIO_FALLOCATE_POSIX:
 101                         dprint(FD_FILE, "posix_fallocate file %s size %llu\n",
 102                                  f->file_name,
 103                                  (unsigned long long) f->real_file_size);
 104
 105                         r = posix_fallocate(f->fd, 0, f->real_file_size);
 106                         if (r > 0) {
 107                                 log_err("fio: posix_fallocate fails: %s\n",
 108                                                 strerror(r));
 109                         }
 110                         break;
 111 #ifdef CONFIG_LINUX_FALLOCATE
 112                 case FIO_FALLOCATE_KEEP_SIZE:
 113                         dprint(FD_FILE,
 114                                 "fallocate(FALLOC_FL_KEEP_SIZE) "
 115                                 "file %s size %llu\n", f->file_name,
 116                                 (unsigned long long) f->real_file_size);
 117
 118                         r = fallocate(f->fd, FALLOC_FL_KEEP_SIZE, 0,
 119                                         f->real_file_size);
 120                         if (r != 0)
 121                                 td_verror(td, errno, "fallocate");
 122
 123                         break;
 124 #endif /* CONFIG_LINUX_FALLOCATE */
 125                 default:
 126                         log_err("fio: unknown fallocate mode: %d\n",
 127                                 td->o.fallocate_mode);
 128                         assert(0);
 129                 }
 130         }
 131 #endif /* CONFIG_POSIX_FALLOCATE */
 132
 133         if (!new_layout)
 134                 goto done;
 135
 136         /*
 137          * The size will be -1ULL when fill_device is used, so don't truncate
 138          * or fallocate this file, just write it
 139          */
 140         if (!td->o.fill_device) {
 141                 dprint(FD_FILE, "truncate file %s, size %llu\n", f->file_name,
 142                                         (unsigned long long) f->real_file_size);
 143                 if (ftruncate(f->fd, f->real_file_size) == -1) {
 144                         if (errno != EFBIG) {
 145                                 td_verror(td, errno, "ftruncate");
 146                                 goto err;
 147                         }
 148                 }
 149         }
 150
 151         b = malloc(td->o.max_bs[DDIR_WRITE]);
 152
 153         left = f->real_file_size;
 154         while (left && !td->terminate) {
 155                 bs = td->o.max_bs[DDIR_WRITE];
 156                 if (bs > left)
 157                         bs = left;
 158
 159                 fill_io_buffer(td, b, bs, bs);
 160
 161                 r = write(f->fd, b, bs);
 162
 163                 if (r > 0) {
 164                         left -= r;
 165                         continue;
 166                 } else {
 167                         if (r < 0) {
 168                                 int __e = errno;
 169
 170                                 if (__e == ENOSPC) {
 171                                         if (td->o.fill_device)
 172                                                 break;
 173                                         log_info("fio: ENOSPC on laying out "
 174                                                  "file, stopping\n");
 175                                         break;
 176                                 }
 177                                 td_verror(td, errno, "write");
 178                         } else
 179                                 td_verror(td, EIO, "write");
 180
 181                         break;
 182                 }
 183         }
 184
 185         if (td->terminate) {
 186                 dprint(FD_FILE, "terminate unlink %s\n", f->file_name);
 187                 td_io_unlink_file(td, f);
 188         } else if (td->o.create_fsync) {
 189                 if (fsync(f->fd) < 0) {
 190                         td_verror(td, errno, "fsync");
 191                         goto err;
 192                 }
 193         }
 194         if (td->o.fill_device && !td_write(td)) {
 195                 fio_file_clear_size_known(f);
 196                 if (td_io_get_file_size(td, f))
 197                         goto err;
 198                 if (f->io_size > f->real_file_size)
 199                         f->io_size = f->real_file_size;
 200         }
 201
 202         free(b);
 203 done:
 204         return 0;
 205 err:
 206         close(f->fd);
 207         f->fd = -1;
 208         if (b)
 209                 free(b);
 210         return 1;
 211 }
 212
 213 static int pre_read_file(struct thread_data *td, struct fio_file *f)
 214 {
 215         int ret = 0, r, did_open = 0, old_runstate;
 216         unsigned long long left;
 217         unsigned int bs;
 218         char *b;
 219
 220         if (td_ioengine_flagged(td, FIO_PIPEIO))
 221                 return 0;
 222
 223         if (!fio_file_open(f)) {
 224                 if (td->io_ops->open_file(td, f)) {
 225                         log_err("fio: cannot pre-read, failed to open file\n");
 226                         return 1;
 227                 }
 228                 did_open = 1;
 229         }
 230
 231         old_runstate = td_bump_runstate(td, TD_PRE_READING);
 232
 233         bs = td->o.max_bs[DDIR_READ];
 234         b = malloc(bs);
 235         memset(b, 0, bs);
 236
 237         if (lseek(f->fd, f->file_offset, SEEK_SET) < 0) {
 238                 td_verror(td, errno, "lseek");
 239                 log_err("fio: failed to lseek pre-read file\n");
 240                 ret = 1;
 241                 goto error;
 242         }
 243
 244         left = f->io_size;
 245
 246         while (left && !td->terminate) {
 247                 if (bs > left)
 248                         bs = left;
 249
 250                 r = read(f->fd, b, bs);
 251
 252                 if (r == (int) bs) {
 253                         left -= bs;
 254                         continue;
 255                 } else {
 256                         td_verror(td, EIO, "pre_read");
 257                         break;
 258                 }
 259         }
 260
 261 error:
 262         td_restore_runstate(td, old_runstate);
 263
 264         if (did_open)
 265                 td->io_ops->close_file(td, f);
 266
 267         free(b);
 268         return ret;
 269 }
 270
 271 unsigned long long get_rand_file_size(struct thread_data *td)
 272 {
 273         unsigned long long ret, sized;
 274         uint64_t frand_max;
 275         unsigned long r;
 276
 277         frand_max = rand_max(&td->file_size_state);
 278         r = __rand(&td->file_size_state);
 279         sized = td->o.file_size_high - td->o.file_size_low;
 280         ret = (unsigned long long) ((double) sized * (r / (frand_max + 1.0)));
 281         ret += td->o.file_size_low;
 282         ret -= (ret % td->o.rw_min_bs);
 283         return ret;
 284 }
 285
 286 static int file_size(struct thread_data *td, struct fio_file *f)
 287 {
 288         struct stat st;
 289
 290         if (stat(f->file_name, &st) == -1) {
 291                 td_verror(td, errno, "fstat");
 292                 return 1;
 293         }
 294
 295         f->real_file_size = st.st_size;
 296         return 0;
 297 }
 298
 299 static int bdev_size(struct thread_data *td, struct fio_file *f)
 300 {
 301         unsigned long long bytes = 0;
 302         int r;
 303
 304         if (td->io_ops->open_file(td, f)) {
 305                 log_err("fio: failed opening blockdev %s for size check\n",
 306                         f->file_name);
 307                 return 1;
 308         }
 309
 310         r = blockdev_size(f, &bytes);
 311         if (r) {
 312                 td_verror(td, r, "blockdev_size");
 313                 goto err;
 314         }
 315
 316         if (!bytes) {
 317                 log_err("%s: zero sized block device?\n", f->file_name);
 318                 goto err;
 319         }
 320
 321         f->real_file_size = bytes;
 322         td->io_ops->close_file(td, f);
 323         return 0;
 324 err:
 325         td->io_ops->close_file(td, f);
 326         return 1;
 327 }
 328
 329 static int char_size(struct thread_data *td, struct fio_file *f)
 330 {
 331 #ifdef FIO_HAVE_CHARDEV_SIZE
 332         unsigned long long bytes = 0;
 333         int r;
 334
 335         if (td->io_ops->open_file(td, f)) {
 336                 log_err("fio: failed opening chardev %s for size check\n",
 337                         f->file_name);
 338                 return 1;
 339         }
 340
 341         r = chardev_size(f, &bytes);
 342         if (r) {
 343                 td_verror(td, r, "chardev_size");
 344                 goto err;
 345         }
 346
 347         if (!bytes) {
 348                 log_err("%s: zero sized char device?\n", f->file_name);
 349                 goto err;
 350         }
 351
 352         f->real_file_size = bytes;
 353         td->io_ops->close_file(td, f);
 354         return 0;
 355 err:
 356         td->io_ops->close_file(td, f);
 357         return 1;
 358 #else
 359         f->real_file_size = -1ULL;
 360         return 0;
 361 #endif
 362 }
 363
 364 static int get_file_size(struct thread_data *td, struct fio_file *f)
 365 {
 366         int ret = 0;
 367
 368         if (fio_file_size_known(f))
 369                 return 0;
 370
 371         if (f->filetype == FIO_TYPE_FILE)
 372                 ret = file_size(td, f);
 373         else if (f->filetype == FIO_TYPE_BLOCK)
 374                 ret = bdev_size(td, f);
 375         else if (f->filetype == FIO_TYPE_CHAR)
 376                 ret = char_size(td, f);
 377         else
 378                 f->real_file_size = -1ULL;
 379
 380         if (ret) {
 381                 f->real_file_size = -1ULL;
 382                 return ret;
 383         }
 384
 385         if (f->file_offset > f->real_file_size) {
 386                 log_err("%s: offset extends end (%llu > %llu)\n", td->o.name,
 387                                         (unsigned long long) f->file_offset,
 388                                         (unsigned long long) f->real_file_size);
 389                 return 1;
 390         }
 391
 392         fio_file_set_size_known(f);
 393         return 0;
 394 }
 395
 396 static int __file_invalidate_cache(struct thread_data *td, struct fio_file *f,
 397                                    unsigned long long off,
 398                                    unsigned long long len)
 399 {
 400         int errval = 0, ret = 0;
 401
 402 #ifdef CONFIG_ESX
 403         return 0;
 404 #endif
 405
 406         if (len == -1ULL)
 407                 len = f->io_size;
 408         if (off == -1ULL)
 409                 off = f->file_offset;
 410
 411         if (len == -1ULL || off == -1ULL)
 412                 return 0;
 413
 414         dprint(FD_IO, "invalidate cache %s: %llu/%llu\n", f->file_name, off,
 415                                                                 len);
 416
 417         if (td->io_ops->invalidate) {
 418                 ret = td->io_ops->invalidate(td, f);
 419                 if (ret < 0)
 420                         errval = ret;
 421         } else if (f->filetype == FIO_TYPE_FILE) {
 422                 ret = posix_fadvise(f->fd, off, len, POSIX_FADV_DONTNEED);
 423                 if (ret)
 424                         errval = ret;
 425         } else if (f->filetype == FIO_TYPE_BLOCK) {
 426                 int retry_count = 0;
 427
 428                 ret = blockdev_invalidate_cache(f);
 429                 while (ret < 0 && errno == EAGAIN && retry_count++ < 25) {
 430                         /*
 431                          * Linux multipath devices reject ioctl while
 432                          * the maps are being updated. That window can
 433                          * last tens of milliseconds; we'll try up to
 434                          * a quarter of a second.
 435                          */
 436                         usleep(10000);
 437                         ret = blockdev_invalidate_cache(f);
 438                 }
 439                 if (ret < 0 && errno == EACCES && geteuid()) {
 440                         if (!root_warn) {
 441                                 log_err("fio: only root may flush block "
 442                                         "devices. Cache flush bypassed!\n");
 443                                 root_warn = 1;
 444                         }
 445                         ret = 0;
 446                 }
 447                 if (ret < 0)
 448                         errval = errno;
 449         } else if (f->filetype == FIO_TYPE_CHAR || f->filetype == FIO_TYPE_PIPE)
 450                 ret = 0;
 451
 452         /*
 453          * Cache flushing isn't a fatal condition, and we know it will
 454          * happen on some platforms where we don't have the proper
 455          * function to flush eg block device caches. So just warn and
 456          * continue on our way.
 457          */
 458         if (errval)
 459                 log_info("fio: cache invalidation of %s failed: %s\n", f->file_name, strerror(errval));
 460
 461         return 0;
 462
 463 }
 464
 465 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
 466 {
 467         if (!fio_file_open(f))
 468                 return 0;
 469
 470         return __file_invalidate_cache(td, f, -1ULL, -1ULL);
 471 }
 472
 473 int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
 474 {
 475         int ret = 0;
 476
 477         dprint(FD_FILE, "fd close %s\n", f->file_name);
 478
 479         remove_file_hash(f);
 480
 481         if (close(f->fd) < 0)
 482                 ret = errno;
 483
 484         f->fd = -1;
 485
 486         if (f->shadow_fd != -1) {
 487                 close(f->shadow_fd);
 488                 f->shadow_fd = -1;
 489         }
 490
 491         f->engine_data = 0;
 492         return ret;
 493 }
 494
 495 int file_lookup_open(struct fio_file *f, int flags)
 496 {
 497         struct fio_file *__f;
 498         int from_hash;
 499
 500         __f = lookup_file_hash(f->file_name);
 501         if (__f) {
 502                 dprint(FD_FILE, "found file in hash %s\n", f->file_name);
 503                 f->lock = __f->lock;
 504                 from_hash = 1;
 505         } else {
 506                 dprint(FD_FILE, "file not found in hash %s\n", f->file_name);
 507                 from_hash = 0;
 508         }
 509
 510 #ifdef WIN32
 511         flags |= _O_BINARY;
 512 #endif
 513
 514         f->fd = open(f->file_name, flags, 0600);
 515         return from_hash;
 516 }
 517
 518 static int file_close_shadow_fds(struct thread_data *td)
 519 {
 520         struct fio_file *f;
 521         int num_closed = 0;
 522         unsigned int i;
 523
 524         for_each_file(td, f, i) {
 525                 if (f->shadow_fd == -1)
 526                         continue;
 527
 528                 close(f->shadow_fd);
 529                 f->shadow_fd = -1;
 530                 num_closed++;
 531         }
 532
 533         return num_closed;
 534 }
 535
 536 int generic_open_file(struct thread_data *td, struct fio_file *f)
 537 {
 538         int is_std = 0;
 539         int flags = 0;
 540         int from_hash = 0;
 541
 542         dprint(FD_FILE, "fd open %s\n", f->file_name);
 543
 544         if (!strcmp(f->file_name, "-")) {
 545                 if (td_rw(td)) {
 546                         log_err("fio: can't read/write to stdin/out\n");
 547                         return 1;
 548                 }
 549                 is_std = 1;
 550
 551                 /*
 552                  * move output logging to stderr, if we are writing to stdout
 553                  */
 554                 if (td_write(td))
 555                         f_out = stderr;
 556         }
 557
 558         if (td_trim(td))
 559                 goto skip_flags;
 560         if (td->o.odirect)
 561                 flags |= OS_O_DIRECT;
 562         if (td->o.oatomic) {
 563                 if (!FIO_O_ATOMIC) {
 564                         td_verror(td, EINVAL, "OS does not support atomic IO");
 565                         return 1;
 566                 }
 567                 flags |= OS_O_DIRECT | FIO_O_ATOMIC;
 568         }
 569         if (td->o.sync_io)
 570                 flags |= O_SYNC;
 571         if (td->o.create_on_open && td->o.allow_create)
 572                 flags |= O_CREAT;
 573 skip_flags:
 574         if (f->filetype != FIO_TYPE_FILE)
 575                 flags |= FIO_O_NOATIME;
 576
 577 open_again:
 578         if (td_write(td)) {
 579                 if (!read_only)
 580                         flags |= O_RDWR;
 581
 582                 if (f->filetype == FIO_TYPE_FILE && td->o.allow_create)
 583                         flags |= O_CREAT;
 584
 585                 if (is_std)
 586                         f->fd = dup(STDOUT_FILENO);
 587                 else
 588                         from_hash = file_lookup_open(f, flags);
 589         } else if (td_read(td)) {
 590                 if (f->filetype == FIO_TYPE_CHAR && !read_only)
 591                         flags |= O_RDWR;
 592                 else
 593                         flags |= O_RDONLY;
 594
 595                 if (is_std)
 596                         f->fd = dup(STDIN_FILENO);
 597                 else
 598                         from_hash = file_lookup_open(f, flags);
 599         } else { //td trim
 600                 flags |= O_RDWR;
 601                 from_hash = file_lookup_open(f, flags);
 602         }
 603
 604         if (f->fd == -1) {
 605                 char buf[FIO_VERROR_SIZE];
 606                 int __e = errno;
 607
 608                 if (__e == EPERM && (flags & FIO_O_NOATIME)) {
 609                         flags &= ~FIO_O_NOATIME;
 610                         goto open_again;
 611                 }
 612                 if (__e == EMFILE && file_close_shadow_fds(td))
 613                         goto open_again;
 614
 615                 snprintf(buf, sizeof(buf), "open(%s)", f->file_name);
 616
 617                 if (__e == EINVAL && (flags & OS_O_DIRECT)) {
 618                         log_err("fio: looks like your file system does not " \
 619                                 "support direct=1/buffered=0\n");
 620                 }
 621
 622                 td_verror(td, __e, buf);
 623                 return 1;
 624         }
 625
 626         if (!from_hash && f->fd != -1) {
 627                 if (add_file_hash(f)) {
 628                         int fio_unused ret;
 629
 630                         /*
 631                          * Stash away descriptor for later close. This is to
 632                          * work-around a "feature" on Linux, where a close of
 633                          * an fd that has been opened for write will trigger
 634                          * udev to call blkid to check partitions, fs id, etc.
 635                          * That pollutes the device cache, which can slow down
 636                          * unbuffered accesses.
 637                          */
 638                         if (f->shadow_fd == -1)
 639                                 f->shadow_fd = f->fd;
 640                         else {
 641                                 /*
 642                                  * OK to ignore, we haven't done anything
 643                                  * with it
 644                                  */
 645                                 ret = generic_close_file(td, f);
 646                         }
 647                         goto open_again;
 648                 }
 649         }
 650
 651         return 0;
 652 }
 653
 654 int generic_get_file_size(struct thread_data *td, struct fio_file *f)
 655 {
 656         return get_file_size(td, f);
 657 }
 658
 659 /*
 660  * open/close all files, so that ->real_file_size gets set
 661  */
 662 static int get_file_sizes(struct thread_data *td)
 663 {
 664         struct fio_file *f;
 665         unsigned int i;
 666         int err = 0;
 667
 668         for_each_file(td, f, i) {
 669                 dprint(FD_FILE, "get file size for %p/%d/%p\n", f, i,
 670                                                                 f->file_name);
 671
 672                 if (td_io_get_file_size(td, f)) {
 673                         if (td->error != ENOENT) {
 674                                 log_err("%s\n", td->verror);
 675                                 err = 1;
 676                                 break;
 677                         }
 678                         clear_error(td);
 679                 }
 680
 681                 if (f->real_file_size == -1ULL && td->o.size)
 682                         f->real_file_size = td->o.size / td->o.nr_files;
 683         }
 684
 685         return err;
 686 }
 687
 688 struct fio_mount {
 689         struct flist_head list;
 690         const char *base;
 691         char __base[256];
 692         unsigned int key;
 693 };
 694
 695 /*
 696  * Get free number of bytes for each file on each unique mount.
 697  */
 698 static unsigned long long get_fs_free_counts(struct thread_data *td)
 699 {
 700         struct flist_head *n, *tmp;
 701         unsigned long long ret = 0;
 702         struct fio_mount *fm;
 703         FLIST_HEAD(list);
 704         struct fio_file *f;
 705         unsigned int i;
 706
 707         for_each_file(td, f, i) {
 708                 struct stat sb;
 709                 char buf[256];
 710
 711                 if (f->filetype == FIO_TYPE_BLOCK || f->filetype == FIO_TYPE_CHAR) {
 712                         if (f->real_file_size != -1ULL)
 713                                 ret += f->real_file_size;
 714                         continue;
 715                 } else if (f->filetype != FIO_TYPE_FILE)
 716                         continue;
 717
 718                 buf[255] = '\0';
 719                 strncpy(buf, f->file_name, 255);
 720
 721                 if (stat(buf, &sb) < 0) {
 722                         if (errno != ENOENT)
 723                                 break;
 724                         strcpy(buf, ".");
 725                         if (stat(buf, &sb) < 0)
 726                                 break;
 727                 }
 728
 729                 fm = NULL;
 730                 flist_for_each(n, &list) {
 731                         fm = flist_entry(n, struct fio_mount, list);
 732                         if (fm->key == sb.st_dev)
 733                                 break;
 734
 735                         fm = NULL;
 736                 }
 737
 738                 if (fm)
 739                         continue;
 740
 741                 fm = calloc(1, sizeof(*fm));
 742                 strncpy(fm->__base, buf, sizeof(fm->__base) - 1);
 743                 fm->base = basename(fm->__base);
 744                 fm->key = sb.st_dev;
 745                 flist_add(&fm->list, &list);
 746         }
 747
 748         flist_for_each_safe(n, tmp, &list) {
 749                 unsigned long long sz;
 750
 751                 fm = flist_entry(n, struct fio_mount, list);
 752                 flist_del(&fm->list);
 753
 754                 sz = get_fs_free_size(fm->base);
 755                 if (sz && sz != -1ULL)
 756                         ret += sz;
 757
 758                 free(fm);
 759         }
 760
 761         return ret;
 762 }
 763
 764 uint64_t get_start_offset(struct thread_data *td, struct fio_file *f)
 765 {
 766         struct thread_options *o = &td->o;
 767
 768         if (o->file_append && f->filetype == FIO_TYPE_FILE)
 769                 return f->real_file_size;
 770
 771         return td->o.start_offset +
 772                 td->subjob_number * td->o.offset_increment;
 773 }
 774
 775 /*
 776  * Open the files and setup files sizes, creating files if necessary.
 777  */
 778 int setup_files(struct thread_data *td)
 779 {
 780         unsigned long long total_size, extend_size;
 781         struct thread_options *o = &td->o;
 782         struct fio_file *f;
 783         unsigned int i, nr_fs_extra = 0;
 784         int err = 0, need_extend;
 785         int old_state;
 786         const unsigned int bs = td_min_bs(td);
 787         uint64_t fs = 0;
 788
 789         dprint(FD_FILE, "setup files\n");
 790
 791         old_state = td_bump_runstate(td, TD_SETTING_UP);
 792
 793         if (o->read_iolog_file)
 794                 goto done;
 795
 796         /*
 797          * if ioengine defines a setup() method, it's responsible for
 798          * opening the files and setting f->real_file_size to indicate
 799          * the valid range for that file.
 800          */
 801         if (td->io_ops->setup)
 802                 err = td->io_ops->setup(td);
 803         else
 804                 err = get_file_sizes(td);
 805
 806         if (err)
 807                 goto err_out;
 808
 809         /*
 810          * check sizes. if the files/devices do not exist and the size
 811          * isn't passed to fio, abort.
 812          */
 813         total_size = 0;
 814         for_each_file(td, f, i) {
 815                 f->fileno = i;
 816                 if (f->real_file_size == -1ULL)
 817                         total_size = -1ULL;
 818                 else
 819                         total_size += f->real_file_size;
 820         }
 821
 822         if (o->fill_device)
 823                 td->fill_device_size = get_fs_free_counts(td);
 824
 825         /*
 826          * device/file sizes are zero and no size given, punt
 827          */
 828         if ((!total_size || total_size == -1ULL) && !o->size &&
 829             !td_ioengine_flagged(td, FIO_NOIO) && !o->fill_device &&
 830             !(o->nr_files && (o->file_size_low || o->file_size_high))) {
 831                 log_err("%s: you need to specify size=\n", o->name);
 832                 td_verror(td, EINVAL, "total_file_size");
 833                 goto err_out;
 834         }
 835
 836         /*
 837          * Calculate per-file size and potential extra size for the
 838          * first files, if needed.
 839          */
 840         if (!o->file_size_low && o->nr_files) {
 841                 uint64_t all_fs;
 842
 843                 fs = o->size / o->nr_files;
 844                 all_fs = fs * o->nr_files;
 845
 846                 if (all_fs < o->size)
 847                         nr_fs_extra = (o->size - all_fs) / bs;
 848         }
 849
 850         /*
 851          * now file sizes are known, so we can set ->io_size. if size= is
 852          * not given, ->io_size is just equal to ->real_file_size. if size
 853          * is given, ->io_size is size / nr_files.
 854          */
 855         extend_size = total_size = 0;
 856         need_extend = 0;
 857         for_each_file(td, f, i) {
 858                 f->file_offset = get_start_offset(td, f);
 859
 860                 if (!o->file_size_low) {
 861                         /*
 862                          * no file size range given, file size is equal to
 863                          * total size divided by number of files. If that is
 864                          * zero, set it to the real file size. If the size
 865                          * doesn't divide nicely with the min blocksize,
 866                          * make the first files bigger.
 867                          */
 868                         f->io_size = fs;
 869                         if (nr_fs_extra) {
 870                                 nr_fs_extra--;
 871                                 f->io_size += bs;
 872                         }
 873
 874                         if (!f->io_size)
 875                                 f->io_size = f->real_file_size - f->file_offset;
 876                 } else if (f->real_file_size < o->file_size_low ||
 877                            f->real_file_size > o->file_size_high) {
 878                         if (f->file_offset > o->file_size_low)
 879                                 goto err_offset;
 880                         /*
 881                          * file size given. if it's fixed, use that. if it's a
 882                          * range, generate a random size in-between.
 883                          */
 884                         if (o->file_size_low == o->file_size_high)
 885                                 f->io_size = o->file_size_low - f->file_offset;
 886                         else {
 887                                 f->io_size = get_rand_file_size(td)
 888                                                 - f->file_offset;
 889                         }
 890                 } else
 891                         f->io_size = f->real_file_size - f->file_offset;
 892
 893                 if (f->io_size == -1ULL)
 894                         total_size = -1ULL;
 895                 else {
 896                         if (o->size_percent) {
 897                                 f->io_size = (f->io_size * o->size_percent) / 100;
 898                                 f->io_size -= (f->io_size % td_min_bs(td));
 899                         }
 900                         total_size += f->io_size;
 901                 }
 902
 903                 if (f->filetype == FIO_TYPE_FILE &&
 904                     (f->io_size + f->file_offset) > f->real_file_size &&
 905                     !td_ioengine_flagged(td, FIO_DISKLESSIO)) {
 906                         if (!o->create_on_open) {
 907                                 need_extend++;
 908                                 extend_size += (f->io_size + f->file_offset);
 909                         } else
 910                                 f->real_file_size = f->io_size + f->file_offset;
 911                         fio_file_set_extend(f);
 912                 }
 913         }
 914
 915         if (td->o.block_error_hist) {
 916                 int len;
 917
 918                 assert(td->o.nr_files == 1);    /* checked in fixup_options */
 919                 f = td->files[0];
 920                 len = f->io_size / td->o.bs[DDIR_TRIM];
 921                 if (len > MAX_NR_BLOCK_INFOS || len <= 0) {
 922                         log_err("fio: cannot calculate block histogram with "
 923                                 "%d trim blocks, maximum %d\n",
 924                                 len, MAX_NR_BLOCK_INFOS);
 925                         td_verror(td, EINVAL, "block_error_hist");
 926                         goto err_out;
 927                 }
 928
 929                 td->ts.nr_block_infos = len;
 930                 for (i = 0; i < len; i++)
 931                         td->ts.block_infos[i] =
 932                                 BLOCK_INFO(0, BLOCK_STATE_UNINIT);
 933         } else
 934                 td->ts.nr_block_infos = 0;
 935
 936         if (!o->size || (total_size && o->size > total_size))
 937                 o->size = total_size;
 938
 939         if (o->size < td_min_bs(td)) {
 940                 log_err("fio: blocksize too large for data set\n");
 941                 goto err_out;
 942         }
 943
 944         /*
 945          * See if we need to extend some files
 946          */
 947         if (need_extend) {
 948                 temp_stall_ts = 1;
 949                 if (output_format & FIO_OUTPUT_NORMAL)
 950                         log_info("%s: Laying out IO file(s) (%u file(s) / %lluMiB)\n",
 951                                  o->name, need_extend, extend_size >> 20);
 952
 953                 for_each_file(td, f, i) {
 954                         unsigned long long old_len = -1ULL, extend_len = -1ULL;
 955
 956                         if (!fio_file_extend(f))
 957                                 continue;
 958
 959                         assert(f->filetype == FIO_TYPE_FILE);
 960                         fio_file_clear_extend(f);
 961                         if (!o->fill_device) {
 962                                 old_len = f->real_file_size;
 963                                 extend_len = f->io_size + f->file_offset -
 964                                                 old_len;
 965                         }
 966                         f->real_file_size = (f->io_size + f->file_offset);
 967                         err = extend_file(td, f);
 968                         if (err)
 969                                 break;
 970
 971                         err = __file_invalidate_cache(td, f, old_len,
 972                                                                 extend_len);
 973
 974                         /*
 975                          * Shut up static checker
 976                          */
 977                         if (f->fd != -1)
 978                                 close(f->fd);
 979
 980                         f->fd = -1;
 981                         if (err)
 982                                 break;
 983                 }
 984                 temp_stall_ts = 0;
 985         }
 986
 987         if (err)
 988                 goto err_out;
 989
 990         if (!o->zone_size)
 991                 o->zone_size = o->size;
 992
 993         /*
 994          * iolog already set the total io size, if we read back
 995          * stored entries.
 996          */
 997         if (!o->read_iolog_file) {
 998                 if (o->io_limit)
 999                         td->total_io_size = o->io_limit * o->loops;
1000                 else
1001                         td->total_io_size = o->size * o->loops;
1002         }
1003
1004 done:
1005         if (o->create_only)
1006                 td->done = 1;
1007
1008         td_restore_runstate(td, old_state);
1009         return 0;
1010 err_offset:
1011         log_err("%s: you need to specify valid offset=\n", o->name);
1012 err_out:
1013         td_restore_runstate(td, old_state);
1014         return 1;
1015 }
1016
1017 int pre_read_files(struct thread_data *td)
1018 {
1019         struct fio_file *f;
1020         unsigned int i;
1021
1022         dprint(FD_FILE, "pre_read files\n");
1023
1024         for_each_file(td, f, i) {
1025                 pre_read_file(td, f);
1026         }
1027
1028         return 1;
1029 }
1030
1031 static int __init_rand_distribution(struct thread_data *td, struct fio_file *f)
1032 {
1033         unsigned int range_size, seed;
1034         unsigned long nranges;
1035         uint64_t fsize;
1036
1037         range_size = min(td->o.min_bs[DDIR_READ], td->o.min_bs[DDIR_WRITE]);
1038         fsize = min(f->real_file_size, f->io_size);
1039
1040         nranges = (fsize + range_size - 1) / range_size;
1041
1042         seed = jhash(f->file_name, strlen(f->file_name), 0) * td->thread_number;
1043         if (!td->o.rand_repeatable)
1044                 seed = td->rand_seeds[4];
1045
1046         if (td->o.random_distribution == FIO_RAND_DIST_ZIPF)
1047                 zipf_init(&f->zipf, nranges, td->o.zipf_theta.u.f, seed);
1048         else if (td->o.random_distribution == FIO_RAND_DIST_PARETO)
1049                 pareto_init(&f->zipf, nranges, td->o.pareto_h.u.f, seed);
1050         else if (td->o.random_distribution == FIO_RAND_DIST_GAUSS)
1051                 gauss_init(&f->gauss, nranges, td->o.gauss_dev.u.f, seed);
1052
1053         return 1;
1054 }
1055
1056 static int init_rand_distribution(struct thread_data *td)
1057 {
1058         struct fio_file *f;
1059         unsigned int i;
1060         int state;
1061
1062         if (td->o.random_distribution == FIO_RAND_DIST_RANDOM)
1063                 return 0;
1064
1065         state = td_bump_runstate(td, TD_SETTING_UP);
1066
1067         for_each_file(td, f, i)
1068                 __init_rand_distribution(td, f);
1069
1070         td_restore_runstate(td, state);
1071
1072         return 1;
1073 }
1074
1075 /*
1076  * Check if the number of blocks exceeds the randomness capability of
1077  * the selected generator. Tausworthe is 32-bit, the others are fullly
1078  * 64-bit capable.
1079  */
1080 static int check_rand_gen_limits(struct thread_data *td, struct fio_file *f,
1081                                  uint64_t blocks)
1082 {
1083         if (blocks <= FRAND32_MAX)
1084                 return 0;
1085         if (td->o.random_generator != FIO_RAND_GEN_TAUSWORTHE)
1086                 return 0;
1087
1088         /*
1089          * If the user hasn't specified a random generator, switch
1090          * to tausworthe64 with informational warning. If the user did
1091          * specify one, just warn.
1092          */
1093         log_info("fio: file %s exceeds 32-bit tausworthe random generator.\n",
1094                         f->file_name);
1095
1096         if (!fio_option_is_set(&td->o, random_generator)) {
1097                 log_info("fio: Switching to tausworthe64. Use the "
1098                          "random_generator= option to get rid of this "
1099                          "warning.\n");
1100                 td->o.random_generator = FIO_RAND_GEN_TAUSWORTHE64;
1101                 return 0;
1102         }
1103
1104         /*
1105          * Just make this information to avoid breaking scripts.
1106          */
1107         log_info("fio: Use the random_generator= option to switch to lfsr or "
1108                          "tausworthe64.\n");
1109         return 0;
1110 }
1111
1112 int init_random_map(struct thread_data *td)
1113 {
1114         unsigned long long blocks;
1115         struct fio_file *f;
1116         unsigned int i;
1117
1118         if (init_rand_distribution(td))
1119                 return 0;
1120         if (!td_random(td))
1121                 return 0;
1122
1123         for_each_file(td, f, i) {
1124                 uint64_t fsize = min(f->real_file_size, f->io_size);
1125
1126                 blocks = fsize / (unsigned long long) td->o.rw_min_bs;
1127
1128                 if (check_rand_gen_limits(td, f, blocks))
1129                         return 1;
1130
1131                 if (td->o.random_generator == FIO_RAND_GEN_LFSR) {
1132                         unsigned long seed;
1133
1134                         seed = td->rand_seeds[FIO_RAND_BLOCK_OFF];
1135
1136                         if (!lfsr_init(&f->lfsr, blocks, seed, 0)) {
1137                                 fio_file_set_lfsr(f);
1138                                 continue;
1139                         }
1140                 } else if (!td->o.norandommap) {
1141                         f->io_axmap = axmap_new(blocks);
1142                         if (f->io_axmap) {
1143                                 fio_file_set_axmap(f);
1144                                 continue;
1145                         }
1146                 } else if (td->o.norandommap)
1147                         continue;
1148
1149                 if (!td->o.softrandommap) {
1150                         log_err("fio: failed allocating random map. If running"
1151                                 " a large number of jobs, try the 'norandommap'"
1152                                 " option or set 'softrandommap'. Or give"
1153                                 " a larger --alloc-size to fio.\n");
1154                         return 1;
1155                 }
1156
1157                 log_info("fio: file %s failed allocating random map. Running "
1158                          "job without.\n", f->file_name);
1159         }
1160
1161         return 0;
1162 }
1163
1164 void close_files(struct thread_data *td)
1165 {
1166         struct fio_file *f;
1167         unsigned int i;
1168
1169         for_each_file(td, f, i) {
1170                 if (fio_file_open(f))
1171                         td_io_close_file(td, f);
1172         }
1173 }
1174
1175 void close_and_free_files(struct thread_data *td)
1176 {
1177         struct fio_file *f;
1178         unsigned int i;
1179
1180         dprint(FD_FILE, "close files\n");
1181
1182         for_each_file(td, f, i) {
1183                 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
1184                         dprint(FD_FILE, "free unlink %s\n", f->file_name);
1185                         td_io_unlink_file(td, f);
1186                 }
1187
1188                 if (fio_file_open(f))
1189                         td_io_close_file(td, f);
1190
1191                 remove_file_hash(f);
1192
1193                 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
1194                         dprint(FD_FILE, "free unlink %s\n", f->file_name);
1195                         td_io_unlink_file(td, f);
1196                 }
1197
1198                 sfree(f->file_name);
1199                 f->file_name = NULL;
1200                 if (fio_file_axmap(f)) {
1201                         axmap_free(f->io_axmap);
1202                         f->io_axmap = NULL;
1203                 }
1204                 sfree(f);
1205         }
1206
1207         td->o.filename = NULL;
1208         free(td->files);
1209         free(td->file_locks);
1210         td->files_index = 0;
1211         td->files = NULL;
1212         td->file_locks = NULL;
1213         td->o.file_lock_mode = FILE_LOCK_NONE;
1214         td->o.nr_files = 0;
1215 }
1216
1217 static void get_file_type(struct fio_file *f)
1218 {
1219         struct stat sb;
1220
1221         if (!strcmp(f->file_name, "-"))
1222                 f->filetype = FIO_TYPE_PIPE;
1223         else
1224                 f->filetype = FIO_TYPE_FILE;
1225
1226 #ifdef WIN32
1227         /* \\.\ is the device namespace in Windows, where every file is
1228          * a block device */
1229         if (strncmp(f->file_name, "\\\\.\\", 4) == 0)
1230                 f->filetype = FIO_TYPE_BLOCK;
1231 #endif
1232
1233         if (!stat(f->file_name, &sb)) {
1234                 if (S_ISBLK(sb.st_mode))
1235                         f->filetype = FIO_TYPE_BLOCK;
1236                 else if (S_ISCHR(sb.st_mode))
1237                         f->filetype = FIO_TYPE_CHAR;
1238                 else if (S_ISFIFO(sb.st_mode))
1239                         f->filetype = FIO_TYPE_PIPE;
1240         }
1241 }
1242
1243 static bool __is_already_allocated(const char *fname, bool set)
1244 {
1245         struct flist_head *entry;
1246         bool ret;
1247
1248         ret = file_bloom_exists(fname, set);
1249         if (!ret)
1250                 return ret;
1251
1252         flist_for_each(entry, &filename_list) {
1253                 struct file_name *fn;
1254
1255                 fn = flist_entry(entry, struct file_name, list);
1256
1257                 if (!strcmp(fn->filename, fname))
1258                         return true;
1259         }
1260
1261         return false;
1262 }
1263
1264 static bool is_already_allocated(const char *fname)
1265 {
1266         bool ret;
1267
1268         fio_file_hash_lock();
1269         ret = __is_already_allocated(fname, false);
1270         fio_file_hash_unlock();
1271
1272         return ret;
1273 }
1274
1275 static void set_already_allocated(const char *fname)
1276 {
1277         struct file_name *fn;
1278
1279         fn = malloc(sizeof(struct file_name));
1280         fn->filename = strdup(fname);
1281
1282         fio_file_hash_lock();
1283         if (!__is_already_allocated(fname, true)) {
1284                 flist_add_tail(&fn->list, &filename_list);
1285                 fn = NULL;
1286         }
1287         fio_file_hash_unlock();
1288
1289         if (fn) {
1290                 free(fn->filename);
1291                 free(fn);
1292         }
1293 }
1294
1295 static void free_already_allocated(void)
1296 {
1297         struct flist_head *entry, *tmp;
1298         struct file_name *fn;
1299
1300         if (flist_empty(&filename_list))
1301                 return;
1302
1303         fio_file_hash_lock();
1304         flist_for_each_safe(entry, tmp, &filename_list) {
1305                 fn = flist_entry(entry, struct file_name, list);
1306                 free(fn->filename);
1307                 flist_del(&fn->list);
1308                 free(fn);
1309         }
1310
1311         fio_file_hash_unlock();
1312 }
1313
1314 static struct fio_file *alloc_new_file(struct thread_data *td)
1315 {
1316         struct fio_file *f;
1317
1318         f = smalloc(sizeof(*f));
1319         if (!f) {
1320                 assert(0);
1321                 return NULL;
1322         }
1323
1324         f->fd = -1;
1325         f->shadow_fd = -1;
1326         fio_file_reset(td, f);
1327         return f;
1328 }
1329
1330 bool exists_and_not_regfile(const char *filename)
1331 {
1332         struct stat sb;
1333
1334         if (lstat(filename, &sb) == -1)
1335                 return false;
1336
1337 #ifndef WIN32 /* NOT Windows */
1338         if (S_ISREG(sb.st_mode))
1339                 return false;
1340 #else
1341         /* \\.\ is the device namespace in Windows, where every file
1342          * is a device node */
1343         if (S_ISREG(sb.st_mode) && strncmp(filename, "\\\\.\\", 4) != 0)
1344                 return false;
1345 #endif
1346
1347         return true;
1348 }
1349
1350 int add_file(struct thread_data *td, const char *fname, int numjob, int inc)
1351 {
1352         int cur_files = td->files_index;
1353         char file_name[PATH_MAX];
1354         struct fio_file *f;
1355         int len = 0;
1356
1357         dprint(FD_FILE, "add file %s\n", fname);
1358
1359         if (td->o.directory)
1360                 len = set_name_idx(file_name, PATH_MAX, td->o.directory, numjob,
1361                                         td->o.unique_filename);
1362
1363         sprintf(file_name + len, "%s", fname);
1364
1365         /* clean cloned siblings using existing files */
1366         if (numjob && is_already_allocated(file_name) &&
1367             !exists_and_not_regfile(fname))
1368                 return 0;
1369
1370         f = alloc_new_file(td);
1371
1372         if (td->files_size <= td->files_index) {
1373                 unsigned int new_size = td->o.nr_files + 1;
1374
1375                 dprint(FD_FILE, "resize file array to %d files\n", new_size);
1376
1377                 td->files = realloc(td->files, new_size * sizeof(f));
1378                 if (td->files == NULL) {
1379                         log_err("fio: realloc OOM\n");
1380                         assert(0);
1381                 }
1382                 if (td->o.file_lock_mode != FILE_LOCK_NONE) {
1383                         td->file_locks = realloc(td->file_locks, new_size);
1384                         if (!td->file_locks) {
1385                                 log_err("fio: realloc OOM\n");
1386                                 assert(0);
1387                         }
1388                         td->file_locks[cur_files] = FILE_LOCK_NONE;
1389                 }
1390                 td->files_size = new_size;
1391         }
1392         td->files[cur_files] = f;
1393         f->fileno = cur_files;
1394
1395         /*
1396          * init function, io engine may not be loaded yet
1397          */
1398         if (td->io_ops && td_ioengine_flagged(td, FIO_DISKLESSIO))
1399                 f->real_file_size = -1ULL;
1400
1401         f->file_name = smalloc_strdup(file_name);
1402         if (!f->file_name)
1403                 assert(0);
1404
1405         get_file_type(f);
1406
1407         switch (td->o.file_lock_mode) {
1408         case FILE_LOCK_NONE:
1409                 break;
1410         case FILE_LOCK_READWRITE:
1411                 f->rwlock = fio_rwlock_init();
1412                 break;
1413         case FILE_LOCK_EXCLUSIVE:
1414                 f->lock = fio_mutex_init(FIO_MUTEX_UNLOCKED);
1415                 break;
1416         default:
1417                 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
1418                 assert(0);
1419         }
1420
1421         td->files_index++;
1422         if (f->filetype == FIO_TYPE_FILE)
1423                 td->nr_normal_files++;
1424
1425         set_already_allocated(file_name);
1426
1427         if (inc)
1428                 td->o.nr_files++;
1429
1430         dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name,
1431                                                         cur_files);
1432
1433         return cur_files;
1434 }
1435
1436 int add_file_exclusive(struct thread_data *td, const char *fname)
1437 {
1438         struct fio_file *f;
1439         unsigned int i;
1440
1441         for_each_file(td, f, i) {
1442                 if (!strcmp(f->file_name, fname))
1443                         return i;
1444         }
1445
1446         return add_file(td, fname, 0, 1);
1447 }
1448
1449 void get_file(struct fio_file *f)
1450 {
1451         dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
1452         assert(fio_file_open(f));
1453         f->references++;
1454 }
1455
1456 int put_file(struct thread_data *td, struct fio_file *f)
1457 {
1458         int f_ret = 0, ret = 0;
1459
1460         dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
1461
1462         if (!fio_file_open(f)) {
1463                 assert(f->fd == -1);
1464                 return 0;
1465         }
1466
1467         assert(f->references);
1468         if (--f->references)
1469                 return 0;
1470
1471         if (should_fsync(td) && td->o.fsync_on_close) {
1472                 f_ret = fsync(f->fd);
1473                 if (f_ret < 0)
1474                         f_ret = errno;
1475         }
1476
1477         if (td->io_ops->close_file)
1478                 ret = td->io_ops->close_file(td, f);
1479
1480         if (!ret)
1481                 ret = f_ret;
1482
1483         td->nr_open_files--;
1484         fio_file_clear_open(f);
1485         assert(f->fd == -1);
1486         return ret;
1487 }
1488
1489 void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
1490 {
1491         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1492                 return;
1493
1494         if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
1495                 if (ddir == DDIR_READ)
1496                         fio_rwlock_read(f->rwlock);
1497                 else
1498                         fio_rwlock_write(f->rwlock);
1499         } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1500                 fio_mutex_down(f->lock);
1501
1502         td->file_locks[f->fileno] = td->o.file_lock_mode;
1503 }
1504
1505 void unlock_file(struct thread_data *td, struct fio_file *f)
1506 {
1507         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1508                 return;
1509
1510         if (td->o.file_lock_mode == FILE_LOCK_READWRITE)
1511                 fio_rwlock_unlock(f->rwlock);
1512         else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1513                 fio_mutex_up(f->lock);
1514
1515         td->file_locks[f->fileno] = FILE_LOCK_NONE;
1516 }
1517
1518 void unlock_file_all(struct thread_data *td, struct fio_file *f)
1519 {
1520         if (td->o.file_lock_mode == FILE_LOCK_NONE || !td->file_locks)
1521                 return;
1522         if (td->file_locks[f->fileno] != FILE_LOCK_NONE)
1523                 unlock_file(td, f);
1524 }
1525
1526 static int recurse_dir(struct thread_data *td, const char *dirname)
1527 {
1528         struct dirent *dir;
1529         int ret = 0;
1530         DIR *D;
1531
1532         D = opendir(dirname);
1533         if (!D) {
1534                 char buf[FIO_VERROR_SIZE];
1535
1536                 snprintf(buf, FIO_VERROR_SIZE, "opendir(%s)", dirname);
1537                 td_verror(td, errno, buf);
1538                 return 1;
1539         }
1540
1541         while ((dir = readdir(D)) != NULL) {
1542                 char full_path[PATH_MAX];
1543                 struct stat sb;
1544
1545                 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
1546                         continue;
1547
1548                 sprintf(full_path, "%s%s%s", dirname, FIO_OS_PATH_SEPARATOR, dir->d_name);
1549
1550                 if (lstat(full_path, &sb) == -1) {
1551                         if (errno != ENOENT) {
1552                                 td_verror(td, errno, "stat");
1553                                 ret = 1;
1554                                 break;
1555                         }
1556                 }
1557
1558                 if (S_ISREG(sb.st_mode)) {
1559                         add_file(td, full_path, 0, 1);
1560                         continue;
1561                 }
1562                 if (!S_ISDIR(sb.st_mode))
1563                         continue;
1564
1565                 ret = recurse_dir(td, full_path);
1566                 if (ret)
1567                         break;
1568         }
1569
1570         closedir(D);
1571         return ret;
1572 }
1573
1574 int add_dir_files(struct thread_data *td, const char *path)
1575 {
1576         int ret = recurse_dir(td, path);
1577
1578         if (!ret)
1579                 log_info("fio: opendir added %d files\n", td->o.nr_files);
1580
1581         return ret;
1582 }
1583
1584 void dup_files(struct thread_data *td, struct thread_data *org)
1585 {
1586         struct fio_file *f;
1587         unsigned int i;
1588
1589         dprint(FD_FILE, "dup files: %d\n", org->files_index);
1590
1591         if (!org->files)
1592                 return;
1593
1594         td->files = malloc(org->files_index * sizeof(f));
1595
1596         if (td->o.file_lock_mode != FILE_LOCK_NONE)
1597                 td->file_locks = malloc(org->files_index);
1598
1599         for_each_file(org, f, i) {
1600                 struct fio_file *__f;
1601
1602                 __f = alloc_new_file(td);
1603
1604                 if (f->file_name) {
1605                         __f->file_name = smalloc_strdup(f->file_name);
1606                         if (!__f->file_name)
1607                                 assert(0);
1608
1609                         __f->filetype = f->filetype;
1610                 }
1611
1612                 if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1613                         __f->lock = f->lock;
1614                 else if (td->o.file_lock_mode == FILE_LOCK_READWRITE)
1615                         __f->rwlock = f->rwlock;
1616
1617                 td->files[i] = __f;
1618         }
1619 }
1620
1621 /*
1622  * Returns the index that matches the filename, or -1 if not there
1623  */
1624 int get_fileno(struct thread_data *td, const char *fname)
1625 {
1626         struct fio_file *f;
1627         unsigned int i;
1628
1629         for_each_file(td, f, i)
1630                 if (!strcmp(f->file_name, fname))
1631                         return i;
1632
1633         return -1;
1634 }
1635
1636 /*
1637  * For log usage, where we add/open/close files automatically
1638  */
1639 void free_release_files(struct thread_data *td)
1640 {
1641         close_files(td);
1642         td->o.nr_files = 0;
1643         td->o.open_files = 0;
1644         td->files_index = 0;
1645         td->nr_normal_files = 0;
1646 }
1647
1648 void fio_file_reset(struct thread_data *td, struct fio_file *f)
1649 {
1650         int i;
1651
1652         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1653                 f->last_pos[i] = f->file_offset;
1654                 f->last_start[i] = -1ULL;
1655         }
1656
1657         if (fio_file_axmap(f))
1658                 axmap_reset(f->io_axmap);
1659         else if (fio_file_lfsr(f))
1660                 lfsr_reset(&f->lfsr, td->rand_seeds[FIO_RAND_BLOCK_OFF]);
1661 }
1662
1663 bool fio_files_done(struct thread_data *td)
1664 {
1665         struct fio_file *f;
1666         unsigned int i;
1667
1668         for_each_file(td, f, i)
1669                 if (!fio_file_done(f))
1670                         return false;
1671
1672         return true;
1673 }
1674
1675 /* free memory used in initialization phase only */
1676 void filesetup_mem_free(void)
1677 {
1678         free_already_allocated();
1679 }