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 /*
  28  * List entry for filename_list
  29  */
  30 struct file_name {
  31         struct flist_head list;
  32         char *filename;
  33 };
  34
  35 static inline void clear_error(struct thread_data *td)
  36 {
  37         td->error = 0;
  38         td->verror[0] = '\0';
  39 }
  40
  41 /*
  42  * Leaves f->fd open on success, caller must close
  43  */
  44 static int extend_file(struct thread_data *td, struct fio_file *f)
  45 {
  46         int r, new_layout = 0, unlink_file = 0, flags;
  47         unsigned long long left;
  48         unsigned int bs;
  49         char *b = NULL;
  50
  51         if (read_only) {
  52                 log_err("fio: refusing extend of file due to read-only\n");
  53                 return 0;
  54         }
  55
  56         /*
  57          * check if we need to lay the file out complete again. fio
  58          * does that for operations involving reads, or for writes
  59          * where overwrite is set
  60          */
  61         if (td_read(td) ||
  62            (td_write(td) && td->o.overwrite && !td->o.file_append) ||
  63             (td_write(td) && td_ioengine_flagged(td, FIO_NOEXTEND)))
  64                 new_layout = 1;
  65         if (td_write(td) && !td->o.overwrite && !td->o.file_append)
  66                 unlink_file = 1;
  67
  68         if (unlink_file || new_layout) {
  69                 int ret;
  70
  71                 dprint(FD_FILE, "layout unlink %s\n", f->file_name);
  72
  73                 ret = td_io_unlink_file(td, f);
  74                 if (ret != 0 && ret != ENOENT) {
  75                         td_verror(td, errno, "unlink");
  76                         return 1;
  77                 }
  78         }
  79
  80         flags = O_WRONLY;
  81         if (td->o.allow_create)
  82                 flags |= O_CREAT;
  83         if (new_layout)
  84                 flags |= O_TRUNC;
  85
  86 #ifdef WIN32
  87         flags |= _O_BINARY;
  88 #endif
  89
  90         dprint(FD_FILE, "open file %s, flags %x\n", f->file_name, flags);
  91         f->fd = open(f->file_name, flags, 0644);
  92         if (f->fd < 0) {
  93                 int err = errno;
  94
  95                 if (err == ENOENT && !td->o.allow_create)
  96                         log_err("fio: file creation disallowed by "
  97                                         "allow_file_create=0\n");
  98                 else
  99                         td_verror(td, err, "open");
 100                 return 1;
 101         }
 102
 103 #ifdef CONFIG_POSIX_FALLOCATE
 104         if (!td->o.fill_device) {
 105                 switch (td->o.fallocate_mode) {
 106                 case FIO_FALLOCATE_NONE:
 107                         break;
 108                 case FIO_FALLOCATE_POSIX:
 109                         dprint(FD_FILE, "posix_fallocate file %s size %llu\n",
 110                                  f->file_name,
 111                                  (unsigned long long) f->real_file_size);
 112
 113                         r = posix_fallocate(f->fd, 0, f->real_file_size);
 114                         if (r > 0) {
 115                                 log_err("fio: posix_fallocate fails: %s\n",
 116                                                 strerror(r));
 117                         }
 118                         break;
 119 #ifdef CONFIG_LINUX_FALLOCATE
 120                 case FIO_FALLOCATE_KEEP_SIZE:
 121                         dprint(FD_FILE,
 122                                 "fallocate(FALLOC_FL_KEEP_SIZE) "
 123                                 "file %s size %llu\n", f->file_name,
 124                                 (unsigned long long) f->real_file_size);
 125
 126                         r = fallocate(f->fd, FALLOC_FL_KEEP_SIZE, 0,
 127                                         f->real_file_size);
 128                         if (r != 0)
 129                                 td_verror(td, errno, "fallocate");
 130
 131                         break;
 132 #endif /* CONFIG_LINUX_FALLOCATE */
 133                 default:
 134                         log_err("fio: unknown fallocate mode: %d\n",
 135                                 td->o.fallocate_mode);
 136                         assert(0);
 137                 }
 138         }
 139 #endif /* CONFIG_POSIX_FALLOCATE */
 140
 141         /*
 142          * If our jobs don't require regular files initially, we're done.
 143          */
 144         if (!new_layout)
 145                 goto done;
 146
 147         /*
 148          * The size will be -1ULL when fill_device is used, so don't truncate
 149          * or fallocate this file, just write it
 150          */
 151         if (!td->o.fill_device) {
 152                 dprint(FD_FILE, "truncate file %s, size %llu\n", f->file_name,
 153                                         (unsigned long long) f->real_file_size);
 154                 if (ftruncate(f->fd, f->real_file_size) == -1) {
 155                         if (errno != EFBIG) {
 156                                 td_verror(td, errno, "ftruncate");
 157                                 goto err;
 158                         }
 159                 }
 160         }
 161
 162         left = f->real_file_size;
 163         bs = td->o.max_bs[DDIR_WRITE];
 164         if (bs > left)
 165                 bs = left;
 166
 167         b = malloc(bs);
 168         if (!b) {
 169                 td_verror(td, errno, "malloc");
 170                 goto err;
 171         }
 172
 173         while (left && !td->terminate) {
 174                 if (bs > left)
 175                         bs = left;
 176
 177                 fill_io_buffer(td, b, bs, bs);
 178
 179                 r = write(f->fd, b, bs);
 180
 181                 if (r > 0) {
 182                         left -= r;
 183                         continue;
 184                 } else {
 185                         if (r < 0) {
 186                                 int __e = errno;
 187
 188                                 if (__e == ENOSPC) {
 189                                         if (td->o.fill_device)
 190                                                 break;
 191                                         log_info("fio: ENOSPC on laying out "
 192                                                  "file, stopping\n");
 193                                         break;
 194                                 }
 195                                 td_verror(td, errno, "write");
 196                         } else
 197                                 td_verror(td, EIO, "write");
 198
 199                         break;
 200                 }
 201         }
 202
 203         if (td->terminate) {
 204                 dprint(FD_FILE, "terminate unlink %s\n", f->file_name);
 205                 td_io_unlink_file(td, f);
 206         } else if (td->o.create_fsync) {
 207                 if (fsync(f->fd) < 0) {
 208                         td_verror(td, errno, "fsync");
 209                         goto err;
 210                 }
 211         }
 212         if (td->o.fill_device && !td_write(td)) {
 213                 fio_file_clear_size_known(f);
 214                 if (td_io_get_file_size(td, f))
 215                         goto err;
 216                 if (f->io_size > f->real_file_size)
 217                         f->io_size = f->real_file_size;
 218         }
 219
 220         free(b);
 221 done:
 222         return 0;
 223 err:
 224         close(f->fd);
 225         f->fd = -1;
 226         if (b)
 227                 free(b);
 228         return 1;
 229 }
 230
 231 static int pre_read_file(struct thread_data *td, struct fio_file *f)
 232 {
 233         int ret = 0, r, did_open = 0, old_runstate;
 234         unsigned long long left;
 235         unsigned int bs;
 236         char *b;
 237
 238         if (td_ioengine_flagged(td, FIO_PIPEIO) ||
 239             td_ioengine_flagged(td, FIO_NOIO))
 240                 return 0;
 241
 242         if (!fio_file_open(f)) {
 243                 if (td->io_ops->open_file(td, f)) {
 244                         log_err("fio: cannot pre-read, failed to open file\n");
 245                         return 1;
 246                 }
 247                 did_open = 1;
 248         }
 249
 250         old_runstate = td_bump_runstate(td, TD_PRE_READING);
 251
 252         left = f->io_size;
 253         bs = td->o.max_bs[DDIR_READ];
 254         if (bs > left)
 255                 bs = left;
 256
 257         b = malloc(bs);
 258         if (!b) {
 259                 td_verror(td, errno, "malloc");
 260                 ret = 1;
 261                 goto error;
 262         }
 263         memset(b, 0, bs);
 264
 265         if (lseek(f->fd, f->file_offset, SEEK_SET) < 0) {
 266                 td_verror(td, errno, "lseek");
 267                 log_err("fio: failed to lseek pre-read file\n");
 268                 ret = 1;
 269                 goto error;
 270         }
 271
 272         while (left && !td->terminate) {
 273                 if (bs > left)
 274                         bs = left;
 275
 276                 r = read(f->fd, b, bs);
 277
 278                 if (r == (int) bs) {
 279                         left -= bs;
 280                         continue;
 281                 } else {
 282                         td_verror(td, EIO, "pre_read");
 283                         break;
 284                 }
 285         }
 286
 287 error:
 288         td_restore_runstate(td, old_runstate);
 289
 290         if (did_open)
 291                 td->io_ops->close_file(td, f);
 292
 293         free(b);
 294         return ret;
 295 }
 296
 297 unsigned long long get_rand_file_size(struct thread_data *td)
 298 {
 299         unsigned long long ret, sized;
 300         uint64_t frand_max;
 301         unsigned long r;
 302
 303         frand_max = rand_max(&td->file_size_state);
 304         r = __rand(&td->file_size_state);
 305         sized = td->o.file_size_high - td->o.file_size_low;
 306         ret = (unsigned long long) ((double) sized * (r / (frand_max + 1.0)));
 307         ret += td->o.file_size_low;
 308         ret -= (ret % td->o.rw_min_bs);
 309         return ret;
 310 }
 311
 312 static int file_size(struct thread_data *td, struct fio_file *f)
 313 {
 314         struct stat st;
 315
 316         if (stat(f->file_name, &st) == -1) {
 317                 td_verror(td, errno, "fstat");
 318                 return 1;
 319         }
 320
 321         f->real_file_size = st.st_size;
 322         return 0;
 323 }
 324
 325 static int bdev_size(struct thread_data *td, struct fio_file *f)
 326 {
 327         unsigned long long bytes = 0;
 328         int r;
 329
 330         if (td->io_ops->open_file(td, f)) {
 331                 log_err("fio: failed opening blockdev %s for size check\n",
 332                         f->file_name);
 333                 return 1;
 334         }
 335
 336         r = blockdev_size(f, &bytes);
 337         if (r) {
 338                 td_verror(td, r, "blockdev_size");
 339                 goto err;
 340         }
 341
 342         if (!bytes) {
 343                 log_err("%s: zero sized block device?\n", f->file_name);
 344                 goto err;
 345         }
 346
 347         f->real_file_size = bytes;
 348         td->io_ops->close_file(td, f);
 349         return 0;
 350 err:
 351         td->io_ops->close_file(td, f);
 352         return 1;
 353 }
 354
 355 static int char_size(struct thread_data *td, struct fio_file *f)
 356 {
 357 #ifdef FIO_HAVE_CHARDEV_SIZE
 358         unsigned long long bytes = 0;
 359         int r;
 360
 361         if (td->io_ops->open_file(td, f)) {
 362                 log_err("fio: failed opening chardev %s for size check\n",
 363                         f->file_name);
 364                 return 1;
 365         }
 366
 367         r = chardev_size(f, &bytes);
 368         if (r) {
 369                 td_verror(td, r, "chardev_size");
 370                 goto err;
 371         }
 372
 373         if (!bytes) {
 374                 log_err("%s: zero sized char device?\n", f->file_name);
 375                 goto err;
 376         }
 377
 378         f->real_file_size = bytes;
 379         td->io_ops->close_file(td, f);
 380         return 0;
 381 err:
 382         td->io_ops->close_file(td, f);
 383         return 1;
 384 #else
 385         f->real_file_size = -1ULL;
 386         return 0;
 387 #endif
 388 }
 389
 390 static int get_file_size(struct thread_data *td, struct fio_file *f)
 391 {
 392         int ret = 0;
 393
 394         if (fio_file_size_known(f))
 395                 return 0;
 396
 397         if (f->filetype == FIO_TYPE_FILE)
 398                 ret = file_size(td, f);
 399         else if (f->filetype == FIO_TYPE_BLOCK)
 400                 ret = bdev_size(td, f);
 401         else if (f->filetype == FIO_TYPE_CHAR)
 402                 ret = char_size(td, f);
 403         else
 404                 f->real_file_size = -1ULL;
 405
 406         /*
 407          * Leave ->real_file_size with 0 since it could be expectation
 408          * of initial setup for regular files.
 409          */
 410         if (ret)
 411                 return ret;
 412
 413         /*
 414          * If ->real_file_size is -1, a conditional for the message
 415          * "offset extends end" is always true, but it makes no sense,
 416          * so just return the same value here.
 417          */
 418         if (f->real_file_size == -1ULL) {
 419                 log_info("%s: failed to get file size of %s\n", td->o.name,
 420                                         f->file_name);
 421                 return 1;
 422         }
 423
 424         if (td->o.start_offset && f->file_offset == 0)
 425                 dprint(FD_FILE, "offset of file %s not initialized yet\n",
 426                                         f->file_name);
 427         /*
 428          * ->file_offset normally hasn't been initialized yet, so this
 429          * is basically always false.
 430          */
 431         if (f->file_offset > f->real_file_size) {
 432                 log_err("%s: offset extends end (%llu > %llu)\n", td->o.name,
 433                                         (unsigned long long) f->file_offset,
 434                                         (unsigned long long) f->real_file_size);
 435                 return 1;
 436         }
 437
 438         fio_file_set_size_known(f);
 439         return 0;
 440 }
 441
 442 static int __file_invalidate_cache(struct thread_data *td, struct fio_file *f,
 443                                    unsigned long long off,
 444                                    unsigned long long len)
 445 {
 446         int errval = 0, ret = 0;
 447
 448 #ifdef CONFIG_ESX
 449         return 0;
 450 #endif
 451
 452         if (len == -1ULL)
 453                 len = f->io_size;
 454         if (off == -1ULL)
 455                 off = f->file_offset;
 456
 457         if (len == -1ULL || off == -1ULL)
 458                 return 0;
 459
 460         if (td->io_ops->invalidate) {
 461                 dprint(FD_IO, "invalidate %s cache %s\n", td->io_ops->name,
 462                         f->file_name);
 463                 ret = td->io_ops->invalidate(td, f);
 464                 if (ret < 0)
 465                         errval = -ret;
 466         } else if (f->filetype == FIO_TYPE_FILE) {
 467                 dprint(FD_IO, "declare unneeded cache %s: %llu/%llu\n",
 468                         f->file_name, off, len);
 469                 ret = posix_fadvise(f->fd, off, len, POSIX_FADV_DONTNEED);
 470                 if (ret)
 471                         errval = ret;
 472         } else if (f->filetype == FIO_TYPE_BLOCK) {
 473                 int retry_count = 0;
 474
 475                 dprint(FD_IO, "drop page cache %s\n", f->file_name);
 476                 ret = blockdev_invalidate_cache(f);
 477                 while (ret < 0 && errno == EAGAIN && retry_count++ < 25) {
 478                         /*
 479                          * Linux multipath devices reject ioctl while
 480                          * the maps are being updated. That window can
 481                          * last tens of milliseconds; we'll try up to
 482                          * a quarter of a second.
 483                          */
 484                         usleep(10000);
 485                         ret = blockdev_invalidate_cache(f);
 486                 }
 487                 if (ret < 0 && errno == EACCES && geteuid()) {
 488                         if (!root_warn) {
 489                                 log_err("fio: only root may flush block "
 490                                         "devices. Cache flush bypassed!\n");
 491                                 root_warn = 1;
 492                         }
 493                         ret = 0;
 494                 }
 495                 if (ret < 0)
 496                         errval = errno;
 497                 else if (ret) /* probably not supported */
 498                         errval = ret;
 499         } else if (f->filetype == FIO_TYPE_CHAR ||
 500                    f->filetype == FIO_TYPE_PIPE) {
 501                 dprint(FD_IO, "invalidate not supported %s\n", f->file_name);
 502                 ret = 0;
 503         }
 504
 505         /*
 506          * Cache flushing isn't a fatal condition, and we know it will
 507          * happen on some platforms where we don't have the proper
 508          * function to flush eg block device caches. So just warn and
 509          * continue on our way.
 510          */
 511         if (errval)
 512                 log_info("fio: cache invalidation of %s failed: %s\n",
 513                          f->file_name, strerror(errval));
 514
 515         return 0;
 516
 517 }
 518
 519 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
 520 {
 521         if (!fio_file_open(f))
 522                 return 0;
 523
 524         return __file_invalidate_cache(td, f, -1ULL, -1ULL);
 525 }
 526
 527 int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
 528 {
 529         int ret = 0;
 530
 531         dprint(FD_FILE, "fd close %s\n", f->file_name);
 532
 533         remove_file_hash(f);
 534
 535         if (close(f->fd) < 0)
 536                 ret = errno;
 537
 538         f->fd = -1;
 539
 540         if (f->shadow_fd != -1) {
 541                 close(f->shadow_fd);
 542                 f->shadow_fd = -1;
 543         }
 544
 545         f->engine_pos = 0;
 546         return ret;
 547 }
 548
 549 int file_lookup_open(struct fio_file *f, int flags)
 550 {
 551         struct fio_file *__f;
 552         int from_hash;
 553
 554         __f = lookup_file_hash(f->file_name);
 555         if (__f) {
 556                 dprint(FD_FILE, "found file in hash %s\n", f->file_name);
 557                 f->lock = __f->lock;
 558                 from_hash = 1;
 559         } else {
 560                 dprint(FD_FILE, "file not found in hash %s\n", f->file_name);
 561                 from_hash = 0;
 562         }
 563
 564 #ifdef WIN32
 565         flags |= _O_BINARY;
 566 #endif
 567
 568         f->fd = open(f->file_name, flags, 0600);
 569         return from_hash;
 570 }
 571
 572 static int file_close_shadow_fds(struct thread_data *td)
 573 {
 574         struct fio_file *f;
 575         int num_closed = 0;
 576         unsigned int i;
 577
 578         for_each_file(td, f, i) {
 579                 if (f->shadow_fd == -1)
 580                         continue;
 581
 582                 close(f->shadow_fd);
 583                 f->shadow_fd = -1;
 584                 num_closed++;
 585         }
 586
 587         return num_closed;
 588 }
 589
 590 int generic_open_file(struct thread_data *td, struct fio_file *f)
 591 {
 592         int is_std = 0;
 593         int flags = 0;
 594         int from_hash = 0;
 595
 596         dprint(FD_FILE, "fd open %s\n", f->file_name);
 597
 598         if (!strcmp(f->file_name, "-")) {
 599                 if (td_rw(td)) {
 600                         log_err("fio: can't read/write to stdin/out\n");
 601                         return 1;
 602                 }
 603                 is_std = 1;
 604
 605                 /*
 606                  * move output logging to stderr, if we are writing to stdout
 607                  */
 608                 if (td_write(td))
 609                         f_out = stderr;
 610         }
 611
 612         if (td_trim(td))
 613                 goto skip_flags;
 614         if (td->o.odirect)
 615                 flags |= OS_O_DIRECT;
 616         if (td->o.oatomic) {
 617                 if (!FIO_O_ATOMIC) {
 618                         td_verror(td, EINVAL, "OS does not support atomic IO");
 619                         return 1;
 620                 }
 621                 flags |= OS_O_DIRECT | FIO_O_ATOMIC;
 622         }
 623         if (td->o.sync_io)
 624                 flags |= O_SYNC;
 625         if (td->o.create_on_open && td->o.allow_create)
 626                 flags |= O_CREAT;
 627 skip_flags:
 628         if (f->filetype != FIO_TYPE_FILE)
 629                 flags |= FIO_O_NOATIME;
 630
 631 open_again:
 632         if (td_write(td)) {
 633                 if (!read_only)
 634                         flags |= O_RDWR;
 635
 636                 if (f->filetype == FIO_TYPE_FILE && td->o.allow_create)
 637                         flags |= O_CREAT;
 638
 639                 if (is_std)
 640                         f->fd = dup(STDOUT_FILENO);
 641                 else
 642                         from_hash = file_lookup_open(f, flags);
 643         } else if (td_read(td)) {
 644                 if (f->filetype == FIO_TYPE_CHAR && !read_only)
 645                         flags |= O_RDWR;
 646                 else
 647                         flags |= O_RDONLY;
 648
 649                 if (is_std)
 650                         f->fd = dup(STDIN_FILENO);
 651                 else
 652                         from_hash = file_lookup_open(f, flags);
 653         } else if (td_trim(td)) {
 654                 assert(!td_rw(td)); /* should have matched above */
 655                 flags |= O_RDWR;
 656                 from_hash = file_lookup_open(f, flags);
 657         }
 658
 659         if (f->fd == -1) {
 660                 char buf[FIO_VERROR_SIZE];
 661                 int __e = errno;
 662
 663                 if (__e == EPERM && (flags & FIO_O_NOATIME)) {
 664                         flags &= ~FIO_O_NOATIME;
 665                         goto open_again;
 666                 }
 667                 if (__e == EMFILE && file_close_shadow_fds(td))
 668                         goto open_again;
 669
 670                 snprintf(buf, sizeof(buf), "open(%s)", f->file_name);
 671
 672                 if (__e == EINVAL && (flags & OS_O_DIRECT)) {
 673                         log_err("fio: looks like your file system does not " \
 674                                 "support direct=1/buffered=0\n");
 675                 }
 676
 677                 td_verror(td, __e, buf);
 678                 return 1;
 679         }
 680
 681         if (!from_hash && f->fd != -1) {
 682                 if (add_file_hash(f)) {
 683                         int fio_unused ret;
 684
 685                         /*
 686                          * Stash away descriptor for later close. This is to
 687                          * work-around a "feature" on Linux, where a close of
 688                          * an fd that has been opened for write will trigger
 689                          * udev to call blkid to check partitions, fs id, etc.
 690                          * That pollutes the device cache, which can slow down
 691                          * unbuffered accesses.
 692                          */
 693                         if (f->shadow_fd == -1)
 694                                 f->shadow_fd = f->fd;
 695                         else {
 696                                 /*
 697                                  * OK to ignore, we haven't done anything
 698                                  * with it
 699                                  */
 700                                 ret = generic_close_file(td, f);
 701                         }
 702                         goto open_again;
 703                 }
 704         }
 705
 706         return 0;
 707 }
 708
 709 /*
 710  * This function i.e. get_file_size() is the default .get_file_size
 711  * implementation of majority of I/O engines.
 712  */
 713 int generic_get_file_size(struct thread_data *td, struct fio_file *f)
 714 {
 715         return get_file_size(td, f);
 716 }
 717
 718 /*
 719  * open/close all files, so that ->real_file_size gets set
 720  */
 721 static int get_file_sizes(struct thread_data *td)
 722 {
 723         struct fio_file *f;
 724         unsigned int i;
 725         int err = 0;
 726
 727         for_each_file(td, f, i) {
 728                 dprint(FD_FILE, "get file size for %p/%d/%s\n", f, i,
 729                                                                 f->file_name);
 730
 731                 if (td_io_get_file_size(td, f)) {
 732                         if (td->error != ENOENT) {
 733                                 log_err("%s\n", td->verror);
 734                                 err = 1;
 735                                 break;
 736                         }
 737                         clear_error(td);
 738                 }
 739
 740                 /*
 741                  * There are corner cases where we end up with -1 for
 742                  * ->real_file_size due to unsupported file type, etc.
 743                  * We then just set to size option value divided by number
 744                  * of files, similar to the way file ->io_size is set.
 745                  * stat(2) failure doesn't set ->real_file_size to -1.
 746                  */
 747                 if (f->real_file_size == -1ULL && td->o.size)
 748                         f->real_file_size = td->o.size / td->o.nr_files;
 749         }
 750
 751         return err;
 752 }
 753
 754 struct fio_mount {
 755         struct flist_head list;
 756         const char *base;
 757         char __base[256];
 758         unsigned int key;
 759 };
 760
 761 /*
 762  * Get free number of bytes for each file on each unique mount.
 763  */
 764 static unsigned long long get_fs_free_counts(struct thread_data *td)
 765 {
 766         struct flist_head *n, *tmp;
 767         unsigned long long ret = 0;
 768         struct fio_mount *fm;
 769         FLIST_HEAD(list);
 770         struct fio_file *f;
 771         unsigned int i;
 772
 773         for_each_file(td, f, i) {
 774                 struct stat sb;
 775                 char buf[256];
 776
 777                 if (f->filetype == FIO_TYPE_BLOCK || f->filetype == FIO_TYPE_CHAR) {
 778                         if (f->real_file_size != -1ULL)
 779                                 ret += f->real_file_size;
 780                         continue;
 781                 } else if (f->filetype != FIO_TYPE_FILE)
 782                         continue;
 783
 784                 buf[255] = '\0';
 785                 strncpy(buf, f->file_name, 255);
 786
 787                 if (stat(buf, &sb) < 0) {
 788                         if (errno != ENOENT)
 789                                 break;
 790                         strcpy(buf, ".");
 791                         if (stat(buf, &sb) < 0)
 792                                 break;
 793                 }
 794
 795                 fm = NULL;
 796                 flist_for_each(n, &list) {
 797                         fm = flist_entry(n, struct fio_mount, list);
 798                         if (fm->key == sb.st_dev)
 799                                 break;
 800
 801                         fm = NULL;
 802                 }
 803
 804                 if (fm)
 805                         continue;
 806
 807                 fm = calloc(1, sizeof(*fm));
 808                 strncpy(fm->__base, buf, sizeof(fm->__base) - 1);
 809                 fm->base = basename(fm->__base);
 810                 fm->key = sb.st_dev;
 811                 flist_add(&fm->list, &list);
 812         }
 813
 814         flist_for_each_safe(n, tmp, &list) {
 815                 unsigned long long sz;
 816
 817                 fm = flist_entry(n, struct fio_mount, list);
 818                 flist_del(&fm->list);
 819
 820                 sz = get_fs_free_size(fm->base);
 821                 if (sz && sz != -1ULL)
 822                         ret += sz;
 823
 824                 free(fm);
 825         }
 826
 827         return ret;
 828 }
 829
 830 uint64_t get_start_offset(struct thread_data *td, struct fio_file *f)
 831 {
 832         struct thread_options *o = &td->o;
 833
 834         if (o->file_append && f->filetype == FIO_TYPE_FILE)
 835                 return f->real_file_size;
 836
 837         return td->o.start_offset +
 838                 td->subjob_number * td->o.offset_increment;
 839 }
 840
 841 /*
 842  * Open the files and setup files sizes, creating files if necessary.
 843  */
 844 int setup_files(struct thread_data *td)
 845 {
 846         unsigned long long total_size, extend_size;
 847         struct thread_options *o = &td->o;
 848         struct fio_file *f;
 849         unsigned int i, nr_fs_extra = 0;
 850         int err = 0, need_extend;
 851         int old_state;
 852         const unsigned int bs = td_min_bs(td);
 853         uint64_t fs = 0;
 854
 855         dprint(FD_FILE, "setup files\n");
 856
 857         old_state = td_bump_runstate(td, TD_SETTING_UP);
 858
 859         if (o->read_iolog_file)
 860                 goto done;
 861
 862         /*
 863          * Find out physical size of files or devices for this thread,
 864          * before we determine I/O size and range of our targets.
 865          * If ioengine defines a setup() method, it's responsible for
 866          * opening the files and setting f->real_file_size to indicate
 867          * the valid range for that file.
 868          */
 869         if (td->io_ops->setup)
 870                 err = td->io_ops->setup(td);
 871         else
 872                 err = get_file_sizes(td);
 873
 874         if (err)
 875                 goto err_out;
 876
 877         /*
 878          * check sizes. if the files/devices do not exist and the size
 879          * isn't passed to fio, abort.
 880          */
 881         total_size = 0;
 882         for_each_file(td, f, i) {
 883                 f->fileno = i;
 884                 if (f->real_file_size == -1ULL)
 885                         total_size = -1ULL;
 886                 else
 887                         total_size += f->real_file_size;
 888         }
 889
 890         if (o->fill_device)
 891                 td->fill_device_size = get_fs_free_counts(td);
 892
 893         /*
 894          * device/file sizes are zero and no size given, punt
 895          */
 896         if ((!total_size || total_size == -1ULL) && !o->size &&
 897             !td_ioengine_flagged(td, FIO_NOIO) && !o->fill_device &&
 898             !(o->nr_files && (o->file_size_low || o->file_size_high))) {
 899                 log_err("%s: you need to specify size=\n", o->name);
 900                 td_verror(td, EINVAL, "total_file_size");
 901                 goto err_out;
 902         }
 903
 904         /*
 905          * Calculate per-file size and potential extra size for the
 906          * first files, if needed (i.e. if we don't have a fixed size).
 907          */
 908         if (!o->file_size_low && o->nr_files) {
 909                 uint64_t all_fs;
 910
 911                 fs = o->size / o->nr_files;
 912                 all_fs = fs * o->nr_files;
 913
 914                 if (all_fs < o->size)
 915                         nr_fs_extra = (o->size - all_fs) / bs;
 916         }
 917
 918         /*
 919          * now file sizes are known, so we can set ->io_size. if size= is
 920          * not given, ->io_size is just equal to ->real_file_size. if size
 921          * is given, ->io_size is size / nr_files.
 922          */
 923         extend_size = total_size = 0;
 924         need_extend = 0;
 925         for_each_file(td, f, i) {
 926                 f->file_offset = get_start_offset(td, f);
 927
 928                 /*
 929                  * Update ->io_size depending on options specified.
 930                  * ->file_size_low being 0 means filesize option isn't set.
 931                  * Non zero ->file_size_low equals ->file_size_high means
 932                  * filesize option is set in a fixed size format.
 933                  * Non zero ->file_size_low not equals ->file_size_high means
 934                  * filesize option is set in a range format.
 935                  */
 936                 if (!o->file_size_low) {
 937                         /*
 938                          * no file size or range given, file size is equal to
 939                          * total size divided by number of files. If the size
 940                          * doesn't divide nicely with the min blocksize,
 941                          * make the first files bigger.
 942                          */
 943                         f->io_size = fs;
 944                         if (nr_fs_extra) {
 945                                 nr_fs_extra--;
 946                                 f->io_size += bs;
 947                         }
 948
 949                         /*
 950                          * We normally don't come here for regular files, but
 951                          * if the result is 0 for a regular file, set it to the
 952                          * real file size. This could be size of the existing
 953                          * one if it already exists, but otherwise will be set
 954                          * to 0. A new file won't be created because
 955                          * ->io_size + ->file_offset equals ->real_file_size.
 956                          */
 957                         if (!f->io_size) {
 958                                 if (f->file_offset > f->real_file_size)
 959                                         goto err_offset;
 960                                 f->io_size = f->real_file_size - f->file_offset;
 961                                 if (!f->io_size)
 962                                         log_info("fio: file %s may be ignored\n",
 963                                                 f->file_name);
 964                         }
 965                 } else if (f->real_file_size < o->file_size_low ||
 966                            f->real_file_size > o->file_size_high) {
 967                         if (f->file_offset > o->file_size_low)
 968                                 goto err_offset;
 969                         /*
 970                          * file size given. if it's fixed, use that. if it's a
 971                          * range, generate a random size in-between.
 972                          */
 973                         if (o->file_size_low == o->file_size_high)
 974                                 f->io_size = o->file_size_low - f->file_offset;
 975                         else {
 976                                 f->io_size = get_rand_file_size(td)
 977                                                 - f->file_offset;
 978                         }
 979                 } else
 980                         f->io_size = f->real_file_size - f->file_offset;
 981
 982                 if (f->io_size == -1ULL)
 983                         total_size = -1ULL;
 984                 else {
 985                         if (o->size_percent) {
 986                                 f->io_size = (f->io_size * o->size_percent) / 100;
 987                                 f->io_size -= (f->io_size % td_min_bs(td));
 988                         }
 989                         total_size += f->io_size;
 990                 }
 991
 992                 if (f->filetype == FIO_TYPE_FILE &&
 993                     (f->io_size + f->file_offset) > f->real_file_size &&
 994                     !td_ioengine_flagged(td, FIO_DISKLESSIO)) {
 995                         if (!o->create_on_open) {
 996                                 need_extend++;
 997                                 extend_size += (f->io_size + f->file_offset);
 998                                 fio_file_set_extend(f);
 999                         } else
1000                                 f->real_file_size = f->io_size + f->file_offset;
1001                 }
1002         }
1003
1004         if (td->o.block_error_hist) {
1005                 int len;
1006
1007                 assert(td->o.nr_files == 1);    /* checked in fixup_options */
1008                 f = td->files[0];
1009                 len = f->io_size / td->o.bs[DDIR_TRIM];
1010                 if (len > MAX_NR_BLOCK_INFOS || len <= 0) {
1011                         log_err("fio: cannot calculate block histogram with "
1012                                 "%d trim blocks, maximum %d\n",
1013                                 len, MAX_NR_BLOCK_INFOS);
1014                         td_verror(td, EINVAL, "block_error_hist");
1015                         goto err_out;
1016                 }
1017
1018                 td->ts.nr_block_infos = len;
1019                 for (i = 0; i < len; i++)
1020                         td->ts.block_infos[i] =
1021                                 BLOCK_INFO(0, BLOCK_STATE_UNINIT);
1022         } else
1023                 td->ts.nr_block_infos = 0;
1024
1025         if (!o->size || (total_size && o->size > total_size))
1026                 o->size = total_size;
1027
1028         if (o->size < td_min_bs(td)) {
1029                 log_err("fio: blocksize too large for data set\n");
1030                 goto err_out;
1031         }
1032
1033         /*
1034          * See if we need to extend some files, typically needed when our
1035          * target regular files don't exist yet, but our jobs require them
1036          * initially due to read I/Os.
1037          */
1038         if (need_extend) {
1039                 temp_stall_ts = 1;
1040                 if (output_format & FIO_OUTPUT_NORMAL) {
1041                         log_info("%s: Laying out IO file%s (%u file%s / %s%lluMiB)\n",
1042                                  o->name,
1043                                  need_extend > 1 ? "s" : "",
1044                                  need_extend,
1045                                  need_extend > 1 ? "s" : "",
1046                                  need_extend > 1 ? "total " : "",
1047                                  extend_size >> 20);
1048                 }
1049
1050                 for_each_file(td, f, i) {
1051                         unsigned long long old_len = -1ULL, extend_len = -1ULL;
1052
1053                         if (!fio_file_extend(f))
1054                                 continue;
1055
1056                         assert(f->filetype == FIO_TYPE_FILE);
1057                         fio_file_clear_extend(f);
1058                         if (!o->fill_device) {
1059                                 old_len = f->real_file_size;
1060                                 extend_len = f->io_size + f->file_offset -
1061                                                 old_len;
1062                         }
1063                         f->real_file_size = (f->io_size + f->file_offset);
1064                         err = extend_file(td, f);
1065                         if (err)
1066                                 break;
1067
1068                         err = __file_invalidate_cache(td, f, old_len,
1069                                                                 extend_len);
1070
1071                         /*
1072                          * Shut up static checker
1073                          */
1074                         if (f->fd != -1)
1075                                 close(f->fd);
1076
1077                         f->fd = -1;
1078                         if (err)
1079                                 break;
1080                 }
1081                 temp_stall_ts = 0;
1082         }
1083
1084         if (err)
1085                 goto err_out;
1086
1087         if (!o->zone_size)
1088                 o->zone_size = o->size;
1089
1090         /*
1091          * iolog already set the total io size, if we read back
1092          * stored entries.
1093          */
1094         if (!o->read_iolog_file) {
1095                 if (o->io_size)
1096                         td->total_io_size = o->io_size * o->loops;
1097                 else
1098                         td->total_io_size = o->size * o->loops;
1099         }
1100
1101 done:
1102         if (o->create_only)
1103                 td->done = 1;
1104
1105         td_restore_runstate(td, old_state);
1106         return 0;
1107 err_offset:
1108         log_err("%s: you need to specify valid offset=\n", o->name);
1109 err_out:
1110         td_restore_runstate(td, old_state);
1111         return 1;
1112 }
1113
1114 int pre_read_files(struct thread_data *td)
1115 {
1116         struct fio_file *f;
1117         unsigned int i;
1118
1119         dprint(FD_FILE, "pre_read files\n");
1120
1121         for_each_file(td, f, i) {
1122                 pre_read_file(td, f);
1123         }
1124
1125         return 1;
1126 }
1127
1128 static int __init_rand_distribution(struct thread_data *td, struct fio_file *f)
1129 {
1130         unsigned int range_size, seed;
1131         unsigned long nranges;
1132         uint64_t fsize;
1133
1134         range_size = min(td->o.min_bs[DDIR_READ], td->o.min_bs[DDIR_WRITE]);
1135         fsize = min(f->real_file_size, f->io_size);
1136
1137         nranges = (fsize + range_size - 1) / range_size;
1138
1139         seed = jhash(f->file_name, strlen(f->file_name), 0) * td->thread_number;
1140         if (!td->o.rand_repeatable)
1141                 seed = td->rand_seeds[4];
1142
1143         if (td->o.random_distribution == FIO_RAND_DIST_ZIPF)
1144                 zipf_init(&f->zipf, nranges, td->o.zipf_theta.u.f, seed);
1145         else if (td->o.random_distribution == FIO_RAND_DIST_PARETO)
1146                 pareto_init(&f->zipf, nranges, td->o.pareto_h.u.f, seed);
1147         else if (td->o.random_distribution == FIO_RAND_DIST_GAUSS)
1148                 gauss_init(&f->gauss, nranges, td->o.gauss_dev.u.f, seed);
1149
1150         return 1;
1151 }
1152
1153 static int init_rand_distribution(struct thread_data *td)
1154 {
1155         struct fio_file *f;
1156         unsigned int i;
1157         int state;
1158
1159         if (td->o.random_distribution == FIO_RAND_DIST_RANDOM)
1160                 return 0;
1161
1162         state = td_bump_runstate(td, TD_SETTING_UP);
1163
1164         for_each_file(td, f, i)
1165                 __init_rand_distribution(td, f);
1166
1167         td_restore_runstate(td, state);
1168
1169         return 1;
1170 }
1171
1172 /*
1173  * Check if the number of blocks exceeds the randomness capability of
1174  * the selected generator. Tausworthe is 32-bit, the others are fullly
1175  * 64-bit capable.
1176  */
1177 static int check_rand_gen_limits(struct thread_data *td, struct fio_file *f,
1178                                  uint64_t blocks)
1179 {
1180         if (blocks <= FRAND32_MAX)
1181                 return 0;
1182         if (td->o.random_generator != FIO_RAND_GEN_TAUSWORTHE)
1183                 return 0;
1184
1185         /*
1186          * If the user hasn't specified a random generator, switch
1187          * to tausworthe64 with informational warning. If the user did
1188          * specify one, just warn.
1189          */
1190         log_info("fio: file %s exceeds 32-bit tausworthe random generator.\n",
1191                         f->file_name);
1192
1193         if (!fio_option_is_set(&td->o, random_generator)) {
1194                 log_info("fio: Switching to tausworthe64. Use the "
1195                          "random_generator= option to get rid of this "
1196                          "warning.\n");
1197                 td->o.random_generator = FIO_RAND_GEN_TAUSWORTHE64;
1198                 return 0;
1199         }
1200
1201         /*
1202          * Just make this information to avoid breaking scripts.
1203          */
1204         log_info("fio: Use the random_generator= option to switch to lfsr or "
1205                          "tausworthe64.\n");
1206         return 0;
1207 }
1208
1209 int init_random_map(struct thread_data *td)
1210 {
1211         unsigned long long blocks;
1212         struct fio_file *f;
1213         unsigned int i;
1214
1215         if (init_rand_distribution(td))
1216                 return 0;
1217         if (!td_random(td))
1218                 return 0;
1219
1220         for_each_file(td, f, i) {
1221                 uint64_t fsize = min(f->real_file_size, f->io_size);
1222
1223                 blocks = fsize / (unsigned long long) td->o.rw_min_bs;
1224
1225                 if (check_rand_gen_limits(td, f, blocks))
1226                         return 1;
1227
1228                 if (td->o.random_generator == FIO_RAND_GEN_LFSR) {
1229                         unsigned long seed;
1230
1231                         seed = td->rand_seeds[FIO_RAND_BLOCK_OFF];
1232
1233                         if (!lfsr_init(&f->lfsr, blocks, seed, 0)) {
1234                                 fio_file_set_lfsr(f);
1235                                 continue;
1236                         }
1237                 } else if (!td->o.norandommap) {
1238                         f->io_axmap = axmap_new(blocks);
1239                         if (f->io_axmap) {
1240                                 fio_file_set_axmap(f);
1241                                 continue;
1242                         }
1243                 } else if (td->o.norandommap)
1244                         continue;
1245
1246                 if (!td->o.softrandommap) {
1247                         log_err("fio: failed allocating random map. If running"
1248                                 " a large number of jobs, try the 'norandommap'"
1249                                 " option or set 'softrandommap'. Or give"
1250                                 " a larger --alloc-size to fio.\n");
1251                         return 1;
1252                 }
1253
1254                 log_info("fio: file %s failed allocating random map. Running "
1255                          "job without.\n", f->file_name);
1256         }
1257
1258         return 0;
1259 }
1260
1261 void close_files(struct thread_data *td)
1262 {
1263         struct fio_file *f;
1264         unsigned int i;
1265
1266         for_each_file(td, f, i) {
1267                 if (fio_file_open(f))
1268                         td_io_close_file(td, f);
1269         }
1270 }
1271
1272 void close_and_free_files(struct thread_data *td)
1273 {
1274         struct fio_file *f;
1275         unsigned int i;
1276
1277         dprint(FD_FILE, "close files\n");
1278
1279         for_each_file(td, f, i) {
1280                 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
1281                         dprint(FD_FILE, "free unlink %s\n", f->file_name);
1282                         td_io_unlink_file(td, f);
1283                 }
1284
1285                 if (fio_file_open(f))
1286                         td_io_close_file(td, f);
1287
1288                 remove_file_hash(f);
1289
1290                 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
1291                         dprint(FD_FILE, "free unlink %s\n", f->file_name);
1292                         td_io_unlink_file(td, f);
1293                 }
1294
1295                 sfree(f->file_name);
1296                 f->file_name = NULL;
1297                 if (fio_file_axmap(f)) {
1298                         axmap_free(f->io_axmap);
1299                         f->io_axmap = NULL;
1300                 }
1301                 sfree(f);
1302         }
1303
1304         td->o.filename = NULL;
1305         free(td->files);
1306         free(td->file_locks);
1307         td->files_index = 0;
1308         td->files = NULL;
1309         td->file_locks = NULL;
1310         td->o.file_lock_mode = FILE_LOCK_NONE;
1311         td->o.nr_files = 0;
1312 }
1313
1314 static void get_file_type(struct fio_file *f)
1315 {
1316         struct stat sb;
1317
1318         if (!strcmp(f->file_name, "-"))
1319                 f->filetype = FIO_TYPE_PIPE;
1320         else
1321                 f->filetype = FIO_TYPE_FILE;
1322
1323 #ifdef WIN32
1324         /* \\.\ is the device namespace in Windows, where every file is
1325          * a block device */
1326         if (strncmp(f->file_name, "\\\\.\\", 4) == 0)
1327                 f->filetype = FIO_TYPE_BLOCK;
1328 #endif
1329
1330         if (!stat(f->file_name, &sb)) {
1331                 if (S_ISBLK(sb.st_mode))
1332                         f->filetype = FIO_TYPE_BLOCK;
1333                 else if (S_ISCHR(sb.st_mode))
1334                         f->filetype = FIO_TYPE_CHAR;
1335                 else if (S_ISFIFO(sb.st_mode))
1336                         f->filetype = FIO_TYPE_PIPE;
1337         }
1338 }
1339
1340 static bool __is_already_allocated(const char *fname, bool set)
1341 {
1342         struct flist_head *entry;
1343         bool ret;
1344
1345         ret = file_bloom_exists(fname, set);
1346         if (!ret)
1347                 return ret;
1348
1349         flist_for_each(entry, &filename_list) {
1350                 struct file_name *fn;
1351
1352                 fn = flist_entry(entry, struct file_name, list);
1353
1354                 if (!strcmp(fn->filename, fname))
1355                         return true;
1356         }
1357
1358         return false;
1359 }
1360
1361 static bool is_already_allocated(const char *fname)
1362 {
1363         bool ret;
1364
1365         fio_file_hash_lock();
1366         ret = __is_already_allocated(fname, false);
1367         fio_file_hash_unlock();
1368
1369         return ret;
1370 }
1371
1372 static void set_already_allocated(const char *fname)
1373 {
1374         struct file_name *fn;
1375
1376         fn = malloc(sizeof(struct file_name));
1377         fn->filename = strdup(fname);
1378
1379         fio_file_hash_lock();
1380         if (!__is_already_allocated(fname, true)) {
1381                 flist_add_tail(&fn->list, &filename_list);
1382                 fn = NULL;
1383         }
1384         fio_file_hash_unlock();
1385
1386         if (fn) {
1387                 free(fn->filename);
1388                 free(fn);
1389         }
1390 }
1391
1392 static void free_already_allocated(void)
1393 {
1394         struct flist_head *entry, *tmp;
1395         struct file_name *fn;
1396
1397         if (flist_empty(&filename_list))
1398                 return;
1399
1400         fio_file_hash_lock();
1401         flist_for_each_safe(entry, tmp, &filename_list) {
1402                 fn = flist_entry(entry, struct file_name, list);
1403                 free(fn->filename);
1404                 flist_del(&fn->list);
1405                 free(fn);
1406         }
1407
1408         fio_file_hash_unlock();
1409 }
1410
1411 static struct fio_file *alloc_new_file(struct thread_data *td)
1412 {
1413         struct fio_file *f;
1414
1415         f = smalloc(sizeof(*f));
1416         if (!f) {
1417                 assert(0);
1418                 return NULL;
1419         }
1420
1421         f->fd = -1;
1422         f->shadow_fd = -1;
1423         fio_file_reset(td, f);
1424         return f;
1425 }
1426
1427 bool exists_and_not_regfile(const char *filename)
1428 {
1429         struct stat sb;
1430
1431         if (lstat(filename, &sb) == -1)
1432                 return false;
1433
1434 #ifndef WIN32 /* NOT Windows */
1435         if (S_ISREG(sb.st_mode))
1436                 return false;
1437 #else
1438         /* \\.\ is the device namespace in Windows, where every file
1439          * is a device node */
1440         if (S_ISREG(sb.st_mode) && strncmp(filename, "\\\\.\\", 4) != 0)
1441                 return false;
1442 #endif
1443
1444         return true;
1445 }
1446
1447 int add_file(struct thread_data *td, const char *fname, int numjob, int inc)
1448 {
1449         int cur_files = td->files_index;
1450         char file_name[PATH_MAX];
1451         struct fio_file *f;
1452         int len = 0;
1453
1454         dprint(FD_FILE, "add file %s\n", fname);
1455
1456         if (td->o.directory)
1457                 len = set_name_idx(file_name, PATH_MAX, td->o.directory, numjob,
1458                                         td->o.unique_filename);
1459
1460         sprintf(file_name + len, "%s", fname);
1461
1462         /* clean cloned siblings using existing files */
1463         if (numjob && is_already_allocated(file_name) &&
1464             !exists_and_not_regfile(fname))
1465                 return 0;
1466
1467         f = alloc_new_file(td);
1468
1469         if (td->files_size <= td->files_index) {
1470                 unsigned int new_size = td->o.nr_files + 1;
1471
1472                 dprint(FD_FILE, "resize file array to %d files\n", new_size);
1473
1474                 td->files = realloc(td->files, new_size * sizeof(f));
1475                 if (td->files == NULL) {
1476                         log_err("fio: realloc OOM\n");
1477                         assert(0);
1478                 }
1479                 if (td->o.file_lock_mode != FILE_LOCK_NONE) {
1480                         td->file_locks = realloc(td->file_locks, new_size);
1481                         if (!td->file_locks) {
1482                                 log_err("fio: realloc OOM\n");
1483                                 assert(0);
1484                         }
1485                         td->file_locks[cur_files] = FILE_LOCK_NONE;
1486                 }
1487                 td->files_size = new_size;
1488         }
1489         td->files[cur_files] = f;
1490         f->fileno = cur_files;
1491
1492         /*
1493          * init function, io engine may not be loaded yet
1494          */
1495         if (td->io_ops && td_ioengine_flagged(td, FIO_DISKLESSIO))
1496                 f->real_file_size = -1ULL;
1497
1498         f->file_name = smalloc_strdup(file_name);
1499         if (!f->file_name)
1500                 assert(0);
1501
1502         get_file_type(f);
1503
1504         switch (td->o.file_lock_mode) {
1505         case FILE_LOCK_NONE:
1506                 break;
1507         case FILE_LOCK_READWRITE:
1508                 f->rwlock = fio_rwlock_init();
1509                 break;
1510         case FILE_LOCK_EXCLUSIVE:
1511                 f->lock = fio_mutex_init(FIO_MUTEX_UNLOCKED);
1512                 break;
1513         default:
1514                 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
1515                 assert(0);
1516         }
1517
1518         td->files_index++;
1519         if (f->filetype == FIO_TYPE_FILE)
1520                 td->nr_normal_files++;
1521
1522         set_already_allocated(file_name);
1523
1524         if (inc)
1525                 td->o.nr_files++;
1526
1527         dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name,
1528                                                         cur_files);
1529
1530         return cur_files;
1531 }
1532
1533 int add_file_exclusive(struct thread_data *td, const char *fname)
1534 {
1535         struct fio_file *f;
1536         unsigned int i;
1537
1538         for_each_file(td, f, i) {
1539                 if (!strcmp(f->file_name, fname))
1540                         return i;
1541         }
1542
1543         return add_file(td, fname, 0, 1);
1544 }
1545
1546 void get_file(struct fio_file *f)
1547 {
1548         dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
1549         assert(fio_file_open(f));
1550         f->references++;
1551 }
1552
1553 int put_file(struct thread_data *td, struct fio_file *f)
1554 {
1555         int f_ret = 0, ret = 0;
1556
1557         dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
1558
1559         if (!fio_file_open(f)) {
1560                 assert(f->fd == -1);
1561                 return 0;
1562         }
1563
1564         assert(f->references);
1565         if (--f->references)
1566                 return 0;
1567
1568         if (should_fsync(td) && td->o.fsync_on_close) {
1569                 f_ret = fsync(f->fd);
1570                 if (f_ret < 0)
1571                         f_ret = errno;
1572         }
1573
1574         if (td->io_ops->close_file)
1575                 ret = td->io_ops->close_file(td, f);
1576
1577         if (!ret)
1578                 ret = f_ret;
1579
1580         td->nr_open_files--;
1581         fio_file_clear_open(f);
1582         assert(f->fd == -1);
1583         return ret;
1584 }
1585
1586 void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
1587 {
1588         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1589                 return;
1590
1591         if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
1592                 if (ddir == DDIR_READ)
1593                         fio_rwlock_read(f->rwlock);
1594                 else
1595                         fio_rwlock_write(f->rwlock);
1596         } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1597                 fio_mutex_down(f->lock);
1598
1599         td->file_locks[f->fileno] = td->o.file_lock_mode;
1600 }
1601
1602 void unlock_file(struct thread_data *td, struct fio_file *f)
1603 {
1604         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1605                 return;
1606
1607         if (td->o.file_lock_mode == FILE_LOCK_READWRITE)
1608                 fio_rwlock_unlock(f->rwlock);
1609         else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1610                 fio_mutex_up(f->lock);
1611
1612         td->file_locks[f->fileno] = FILE_LOCK_NONE;
1613 }
1614
1615 void unlock_file_all(struct thread_data *td, struct fio_file *f)
1616 {
1617         if (td->o.file_lock_mode == FILE_LOCK_NONE || !td->file_locks)
1618                 return;
1619         if (td->file_locks[f->fileno] != FILE_LOCK_NONE)
1620                 unlock_file(td, f);
1621 }
1622
1623 static int recurse_dir(struct thread_data *td, const char *dirname)
1624 {
1625         struct dirent *dir;
1626         int ret = 0;
1627         DIR *D;
1628
1629         D = opendir(dirname);
1630         if (!D) {
1631                 char buf[FIO_VERROR_SIZE];
1632
1633                 snprintf(buf, FIO_VERROR_SIZE, "opendir(%s)", dirname);
1634                 td_verror(td, errno, buf);
1635                 return 1;
1636         }
1637
1638         while ((dir = readdir(D)) != NULL) {
1639                 char full_path[PATH_MAX];
1640                 struct stat sb;
1641
1642                 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
1643                         continue;
1644
1645                 sprintf(full_path, "%s%s%s", dirname, FIO_OS_PATH_SEPARATOR, dir->d_name);
1646
1647                 if (lstat(full_path, &sb) == -1) {
1648                         if (errno != ENOENT) {
1649                                 td_verror(td, errno, "stat");
1650                                 ret = 1;
1651                                 break;
1652                         }
1653                 }
1654
1655                 if (S_ISREG(sb.st_mode)) {
1656                         add_file(td, full_path, 0, 1);
1657                         continue;
1658                 }
1659                 if (!S_ISDIR(sb.st_mode))
1660                         continue;
1661
1662                 ret = recurse_dir(td, full_path);
1663                 if (ret)
1664                         break;
1665         }
1666
1667         closedir(D);
1668         return ret;
1669 }
1670
1671 int add_dir_files(struct thread_data *td, const char *path)
1672 {
1673         int ret = recurse_dir(td, path);
1674
1675         if (!ret)
1676                 log_info("fio: opendir added %d files\n", td->o.nr_files);
1677
1678         return ret;
1679 }
1680
1681 void dup_files(struct thread_data *td, struct thread_data *org)
1682 {
1683         struct fio_file *f;
1684         unsigned int i;
1685
1686         dprint(FD_FILE, "dup files: %d\n", org->files_index);
1687
1688         if (!org->files)
1689                 return;
1690
1691         td->files = malloc(org->files_index * sizeof(f));
1692
1693         if (td->o.file_lock_mode != FILE_LOCK_NONE)
1694                 td->file_locks = malloc(org->files_index);
1695
1696         for_each_file(org, f, i) {
1697                 struct fio_file *__f;
1698
1699                 __f = alloc_new_file(td);
1700
1701                 if (f->file_name) {
1702                         __f->file_name = smalloc_strdup(f->file_name);
1703                         if (!__f->file_name)
1704                                 assert(0);
1705
1706                         __f->filetype = f->filetype;
1707                 }
1708
1709                 if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1710                         __f->lock = f->lock;
1711                 else if (td->o.file_lock_mode == FILE_LOCK_READWRITE)
1712                         __f->rwlock = f->rwlock;
1713
1714                 td->files[i] = __f;
1715         }
1716 }
1717
1718 /*
1719  * Returns the index that matches the filename, or -1 if not there
1720  */
1721 int get_fileno(struct thread_data *td, const char *fname)
1722 {
1723         struct fio_file *f;
1724         unsigned int i;
1725
1726         for_each_file(td, f, i)
1727                 if (!strcmp(f->file_name, fname))
1728                         return i;
1729
1730         return -1;
1731 }
1732
1733 /*
1734  * For log usage, where we add/open/close files automatically
1735  */
1736 void free_release_files(struct thread_data *td)
1737 {
1738         close_files(td);
1739         td->o.nr_files = 0;
1740         td->o.open_files = 0;
1741         td->files_index = 0;
1742         td->nr_normal_files = 0;
1743 }
1744
1745 void fio_file_reset(struct thread_data *td, struct fio_file *f)
1746 {
1747         int i;
1748
1749         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1750                 f->last_pos[i] = f->file_offset;
1751                 f->last_start[i] = -1ULL;
1752         }
1753
1754         if (fio_file_axmap(f))
1755                 axmap_reset(f->io_axmap);
1756         else if (fio_file_lfsr(f))
1757                 lfsr_reset(&f->lfsr, td->rand_seeds[FIO_RAND_BLOCK_OFF]);
1758 }
1759
1760 bool fio_files_done(struct thread_data *td)
1761 {
1762         struct fio_file *f;
1763         unsigned int i;
1764
1765         for_each_file(td, f, i)
1766                 if (!fio_file_done(f))
1767                         return false;
1768
1769         return true;
1770 }
1771
1772 /* free memory used in initialization phase only */
1773 void filesetup_mem_free(void)
1774 {
1775         free_already_allocated();
1776 }