filesetup.c

   1 #include <unistd.h>
   2 #include <fcntl.h>
   3 #include <string.h>
   4 #include <assert.h>
   5 #include <dirent.h>
   6 #include <sys/stat.h>
   7 #include <sys/mman.h>
   8 #include <sys/types.h>
   9
  10 #include "fio.h"
  11 #include "smalloc.h"
  12 #include "filehash.h"
  13
  14 static int root_warn;
  15
  16 static int extend_file(struct thread_data *td, struct fio_file *f)
  17 {
  18         int r, new_layout = 0, unlink_file = 0, flags;
  19         unsigned long long left;
  20         unsigned int bs;
  21         char *b;
  22
  23         if (read_only) {
  24                 log_err("fio: refusing extend of file due to read-only\n");
  25                 return 0;
  26         }
  27
  28         /*
  29          * check if we need to lay the file out complete again. fio
  30          * does that for operations involving reads, or for writes
  31          * where overwrite is set
  32          */
  33         if (td_read(td) || (td_write(td) && td->o.overwrite))
  34                 new_layout = 1;
  35         if (td_write(td) && !td->o.overwrite)
  36                 unlink_file = 1;
  37
  38         if (unlink_file || new_layout) {
  39                 if ((unlink(f->file_name) < 0) && (errno != ENOENT)) {
  40                         td_verror(td, errno, "unlink");
  41                         return 1;
  42                 }
  43         }
  44
  45         flags = O_WRONLY | O_CREAT;
  46         if (new_layout)
  47                 flags |= O_TRUNC;
  48
  49         dprint(FD_FILE, "open file %s, flags %x\n", f->file_name, flags);
  50         f->fd = open(f->file_name, flags, 0644);
  51         if (f->fd < 0) {
  52                 td_verror(td, errno, "open");
  53                 return 1;
  54         }
  55
  56         if (!new_layout)
  57                 goto done;
  58
  59         dprint(FD_FILE, "truncate file %s, size %llu\n", f->file_name,
  60                                                         f->real_file_size);
  61         if (ftruncate(f->fd, f->real_file_size) == -1) {
  62                 td_verror(td, errno, "ftruncate");
  63                 goto err;
  64         }
  65
  66         dprint(FD_FILE, "fallocate file %s, size %llu\n", f->file_name,
  67                                                         f->real_file_size);
  68         if (posix_fallocate(f->fd, 0, f->real_file_size) < 0) {
  69                 td_verror(td, errno, "posix_fallocate");
  70                 goto err;
  71         }
  72
  73         b = malloc(td->o.max_bs[DDIR_WRITE]);
  74         memset(b, 0, td->o.max_bs[DDIR_WRITE]);
  75
  76         left = f->real_file_size;
  77         while (left && !td->terminate) {
  78                 bs = td->o.max_bs[DDIR_WRITE];
  79                 if (bs > left)
  80                         bs = left;
  81
  82                 r = write(f->fd, b, bs);
  83
  84                 if (r == (int) bs) {
  85                         left -= bs;
  86                         continue;
  87                 } else {
  88                         if (r < 0)
  89                                 td_verror(td, errno, "write");
  90                         else
  91                                 td_verror(td, EIO, "write");
  92
  93                         break;
  94                 }
  95         }
  96
  97         if (td->terminate)
  98                 unlink(f->file_name);
  99         else if (td->o.create_fsync) {
 100                 if (fsync(f->fd) < 0) {
 101                         td_verror(td, errno, "fsync");
 102                         goto err;
 103                 }
 104         }
 105
 106         free(b);
 107 done:
 108         close(f->fd);
 109         f->fd = -1;
 110         return 0;
 111 err:
 112         close(f->fd);
 113         f->fd = -1;
 114         return 1;
 115 }
 116
 117 static unsigned long long get_rand_file_size(struct thread_data *td)
 118 {
 119         unsigned long long ret, size_d;
 120         long r;
 121
 122         r = os_random_long(&td->file_size_state);
 123         size_d = td->o.file_size_high - td->o.file_size_low;
 124         ret = (unsigned long long) ((double) size_d * (r / (RAND_MAX + 1.0)));
 125         ret += td->o.file_size_low;
 126         ret -= (ret % td->o.rw_min_bs);
 127         return ret;
 128 }
 129
 130 static int file_size(struct thread_data *td, struct fio_file *f)
 131 {
 132         struct stat st;
 133
 134         if (fstat(f->fd, &st) == -1) {
 135                 td_verror(td, errno, "fstat");
 136                 return 1;
 137         }
 138
 139         f->real_file_size = st.st_size;
 140         return 0;
 141 }
 142
 143 static int bdev_size(struct thread_data *td, struct fio_file *f)
 144 {
 145         unsigned long long bytes;
 146         int r;
 147
 148         r = blockdev_size(f->fd, &bytes);
 149         if (r) {
 150                 td_verror(td, r, "blockdev_size");
 151                 return 1;
 152         }
 153
 154         f->real_file_size = bytes;
 155         return 0;
 156 }
 157
 158 static int get_file_size(struct thread_data *td, struct fio_file *f)
 159 {
 160         int ret = 0;
 161
 162         if (f->flags & FIO_SIZE_KNOWN)
 163                 return 0;
 164
 165         if (f->filetype == FIO_TYPE_FILE)
 166                 ret = file_size(td, f);
 167         else if (f->filetype == FIO_TYPE_BD)
 168                 ret = bdev_size(td, f);
 169         else
 170                 f->real_file_size = -1;
 171
 172         if (ret)
 173                 return ret;
 174
 175         if (f->file_offset > f->real_file_size) {
 176                 log_err("%s: offset extends end (%Lu > %Lu)\n", td->o.name,
 177                                         f->file_offset, f->real_file_size);
 178                 return 1;
 179         }
 180
 181         f->flags |= FIO_SIZE_KNOWN;
 182         return 0;
 183 }
 184
 185 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
 186 {
 187         int ret = 0;
 188
 189         dprint(FD_IO, "invalidate cache (%d)\n", td->o.odirect);
 190
 191         if (td->o.odirect)
 192                 return 0;
 193
 194         /*
 195          * FIXME: add blockdev flushing too
 196          */
 197         if (f->mmap)
 198                 ret = madvise(f->mmap, f->io_size, MADV_DONTNEED);
 199         else if (f->filetype == FIO_TYPE_FILE) {
 200                 ret = fadvise(f->fd, f->file_offset, f->io_size,
 201                                                 POSIX_FADV_DONTNEED);
 202         } else if (f->filetype == FIO_TYPE_BD) {
 203                 ret = blockdev_invalidate_cache(f->fd);
 204                 if (ret < 0 && errno == EACCES && geteuid()) {
 205                         if (!root_warn) {
 206                                 log_err("fio: only root may flush block "
 207                                         "devices. Cache flush bypassed!\n");
 208                                 root_warn = 1;
 209                         }
 210                         ret = 0;
 211                 }
 212         } else if (f->filetype == FIO_TYPE_CHAR || f->filetype == FIO_TYPE_PIPE)
 213                 ret = 0;
 214
 215         if (ret < 0) {
 216                 td_verror(td, errno, "invalidate_cache");
 217                 return 1;
 218         }
 219
 220         return ret;
 221 }
 222
 223 int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
 224 {
 225         int ret = 0;
 226
 227         dprint(FD_FILE, "fd close %s\n", f->file_name);
 228
 229         remove_file_hash(f);
 230
 231         if (close(f->fd) < 0)
 232                 ret = errno;
 233
 234         f->fd = -1;
 235         return ret;
 236 }
 237
 238 static int file_lookup_open(struct fio_file *f, int flags)
 239 {
 240         struct fio_file *__f;
 241         int from_hash;
 242
 243         __f = lookup_file_hash(f->file_name);
 244         if (__f) {
 245                 dprint(FD_FILE, "found file in hash %s\n", f->file_name);
 246                 /*
 247                  * racy, need the __f->lock locked
 248                  */
 249                 f->lock = __f->lock;
 250                 f->lock_owner = __f->lock_owner;
 251                 f->lock_batch = __f->lock_batch;
 252                 f->lock_ddir = __f->lock_ddir;
 253                 from_hash = 1;
 254         } else {
 255                 dprint(FD_FILE, "file not found in hash %s\n", f->file_name);
 256                 from_hash = 0;
 257         }
 258
 259         f->fd = open(f->file_name, flags, 0600);
 260         return from_hash;
 261 }
 262
 263 int generic_open_file(struct thread_data *td, struct fio_file *f)
 264 {
 265         int is_std = 0;
 266         int flags = 0;
 267         int from_hash = 0;
 268
 269         dprint(FD_FILE, "fd open %s\n", f->file_name);
 270
 271         if (!strcmp(f->file_name, "-")) {
 272                 if (td_rw(td)) {
 273                         log_err("fio: can't read/write to stdin/out\n");
 274                         return 1;
 275                 }
 276                 is_std = 1;
 277
 278                 /*
 279                  * move output logging to stderr, if we are writing to stdout
 280                  */
 281                 if (td_write(td))
 282                         f_out = stderr;
 283         }
 284
 285         if (td->o.odirect)
 286                 flags |= OS_O_DIRECT;
 287         if (td->o.sync_io)
 288                 flags |= O_SYNC;
 289         if (f->filetype != FIO_TYPE_FILE)
 290                 flags |= O_NOATIME;
 291
 292 open_again:
 293         if (td_write(td)) {
 294                 if (!read_only)
 295                         flags |= O_RDWR;
 296
 297                 if (f->filetype == FIO_TYPE_FILE)
 298                         flags |= O_CREAT;
 299
 300                 if (is_std)
 301                         f->fd = dup(STDOUT_FILENO);
 302                 else
 303                         from_hash = file_lookup_open(f, flags);
 304         } else {
 305                 if (f->filetype == FIO_TYPE_CHAR && !read_only)
 306                         flags |= O_RDWR;
 307                 else
 308                         flags |= O_RDONLY;
 309
 310                 if (is_std)
 311                         f->fd = dup(STDIN_FILENO);
 312                 else
 313                         from_hash = file_lookup_open(f, flags);
 314         }
 315
 316         if (f->fd == -1) {
 317                 char buf[FIO_VERROR_SIZE];
 318                 int __e = errno;
 319
 320                 if (errno == EPERM && (flags & O_NOATIME)) {
 321                         flags &= ~O_NOATIME;
 322                         goto open_again;
 323                 }
 324
 325                 snprintf(buf, sizeof(buf) - 1, "open(%s)", f->file_name);
 326
 327                 td_verror(td, __e, buf);
 328         }
 329
 330         if (get_file_size(td, f))
 331                 goto err;
 332
 333         if (!from_hash && f->fd != -1) {
 334                 if (add_file_hash(f)) {
 335                         int ret;
 336
 337                         /*
 338                          * OK to ignore, we haven't done anything with it
 339                          */
 340                         ret = generic_close_file(td, f);
 341                         goto open_again;
 342                 }
 343         }
 344
 345         return 0;
 346 err:
 347         close(f->fd);
 348         return 1;
 349 }
 350
 351 int open_files(struct thread_data *td)
 352 {
 353         struct fio_file *f;
 354         unsigned int i;
 355         int err = 0;
 356
 357         dprint(FD_FILE, "open files\n");
 358
 359         for_each_file(td, f, i) {
 360                 err = td_io_open_file(td, f);
 361                 if (err) {
 362                         if (td->error == EMFILE) {
 363                                 log_err("fio: limited open files to: %d\n",
 364                                                         td->nr_open_files);
 365                                 td->o.open_files = td->nr_open_files;
 366                                 err = 0;
 367                                 clear_error(td);
 368                         }
 369                         break;
 370                 }
 371
 372                 if (td->o.open_files == td->nr_open_files)
 373                         break;
 374         }
 375
 376         if (!err)
 377                 return 0;
 378
 379         for_each_file(td, f, i)
 380                 td_io_close_file(td, f);
 381
 382         return err;
 383 }
 384
 385 /*
 386  * open/close all files, so that ->real_file_size gets set
 387  */
 388 static int get_file_sizes(struct thread_data *td)
 389 {
 390         struct fio_file *f;
 391         unsigned int i;
 392         int err = 0;
 393
 394         for_each_file(td, f, i) {
 395                 dprint(FD_FILE, "get file size for %p/%d/%p\n", f, i,
 396                                                                 f->file_name);
 397
 398                 if (td->io_ops->open_file(td, f)) {
 399                         if (td->error != ENOENT) {
 400                                 log_err("%s\n", td->verror);
 401                                 err = 1;
 402                         }
 403                         clear_error(td);
 404                 } else {
 405                         if (td->io_ops->close_file)
 406                                 td->io_ops->close_file(td, f);
 407                 }
 408
 409                 if (f->real_file_size == -1ULL && td->o.size)
 410                         f->real_file_size = td->o.size / td->o.nr_files;
 411         }
 412
 413         return err;
 414 }
 415
 416 /*
 417  * Open the files and setup files sizes, creating files if necessary.
 418  */
 419 int setup_files(struct thread_data *td)
 420 {
 421         unsigned long long total_size, extend_size;
 422         struct fio_file *f;
 423         unsigned int i;
 424         int err = 0, need_extend;
 425
 426         dprint(FD_FILE, "setup files\n");
 427
 428         /*
 429          * if ioengine defines a setup() method, it's responsible for
 430          * opening the files and setting f->real_file_size to indicate
 431          * the valid range for that file.
 432          */
 433         if (td->io_ops->setup)
 434                 err = td->io_ops->setup(td);
 435         else
 436                 err = get_file_sizes(td);
 437
 438         if (err)
 439                 return err;
 440
 441         /*
 442          * check sizes. if the files/devices do not exist and the size
 443          * isn't passed to fio, abort.
 444          */
 445         total_size = 0;
 446         for_each_file(td, f, i) {
 447                 if (f->real_file_size == -1ULL)
 448                         total_size = -1ULL;
 449                 else
 450                         total_size += f->real_file_size;
 451         }
 452
 453         /*
 454          * device/file sizes are zero and no size given, punt
 455          */
 456         if ((!total_size || total_size == -1ULL) && !td->o.size &&
 457             !(td->io_ops->flags & FIO_NOIO) && !td->o.fill_device) {
 458                 log_err("%s: you need to specify size=\n", td->o.name);
 459                 td_verror(td, EINVAL, "total_file_size");
 460                 return 1;
 461         }
 462
 463         /*
 464          * now file sizes are known, so we can set ->io_size. if size= is
 465          * not given, ->io_size is just equal to ->real_file_size. if size
 466          * is given, ->io_size is size / nr_files.
 467          */
 468         extend_size = total_size = 0;
 469         need_extend = 0;
 470         for_each_file(td, f, i) {
 471                 f->file_offset = td->o.start_offset;
 472
 473                 if (!td->o.file_size_low) {
 474                         /*
 475                          * no file size range given, file size is equal to
 476                          * total size divided by number of files. if that is
 477                          * zero, set it to the real file size.
 478                          */
 479                         f->io_size = td->o.size / td->o.nr_files;
 480                         if (!f->io_size)
 481                                 f->io_size = f->real_file_size - f->file_offset;
 482                 } else if (f->real_file_size < td->o.file_size_low ||
 483                            f->real_file_size > td->o.file_size_high) {
 484                         if (f->file_offset > td->o.file_size_low)
 485                                 goto err_offset;
 486                         /*
 487                          * file size given. if it's fixed, use that. if it's a
 488                          * range, generate a random size in-between.
 489                          */
 490                         if (td->o.file_size_low == td->o.file_size_high) {
 491                                 f->io_size = td->o.file_size_low
 492                                                 - f->file_offset;
 493                         } else {
 494                                 f->io_size = get_rand_file_size(td)
 495                                                 - f->file_offset;
 496                         }
 497                 } else
 498                         f->io_size = f->real_file_size - f->file_offset;
 499
 500                 if (f->io_size == -1ULL)
 501                         total_size = -1ULL;
 502                 else
 503                         total_size += f->io_size;
 504
 505                 if (f->filetype == FIO_TYPE_FILE &&
 506                     (f->io_size + f->file_offset) > f->real_file_size &&
 507                     !(td->io_ops->flags & FIO_DISKLESSIO)) {
 508                         need_extend++;
 509                         extend_size += (f->io_size + f->file_offset);
 510                         f->flags |= FIO_FILE_EXTEND;
 511                 }
 512         }
 513
 514         if (!td->o.size || td->o.size > total_size)
 515                 td->o.size = total_size;
 516
 517         /*
 518          * See if we need to extend some files
 519          */
 520         if (need_extend) {
 521                 temp_stall_ts = 1;
 522                 log_info("%s: Laying out IO file(s) (%u file(s) / %LuMiB)\n",
 523                         td->o.name, need_extend, extend_size >> 20);
 524
 525                 for_each_file(td, f, i) {
 526                         if (!(f->flags & FIO_FILE_EXTEND))
 527                                 continue;
 528
 529                         assert(f->filetype == FIO_TYPE_FILE);
 530                         f->flags &= ~FIO_FILE_EXTEND;
 531                         f->real_file_size = (f->io_size + f->file_offset);
 532                         err = extend_file(td, f);
 533                         if (err)
 534                                 break;
 535                 }
 536                 temp_stall_ts = 0;
 537         }
 538
 539         if (err)
 540                 return err;
 541
 542         if (!td->o.zone_size)
 543                 td->o.zone_size = td->o.size;
 544
 545         /*
 546          * iolog already set the total io size, if we read back
 547          * stored entries.
 548          */
 549         if (!td->o.read_iolog_file)
 550                 td->total_io_size = td->o.size * td->o.loops;
 551         return 0;
 552 err_offset:
 553         log_err("%s: you need to specify valid offset=\n", td->o.name);
 554         return 1;
 555 }
 556
 557 int init_random_map(struct thread_data *td)
 558 {
 559         unsigned long long blocks, num_maps;
 560         struct fio_file *f;
 561         unsigned int i;
 562
 563         if (td->o.norandommap || !td_random(td))
 564                 return 0;
 565
 566         for_each_file(td, f, i) {
 567                 blocks = (f->real_file_size + td->o.rw_min_bs - 1) /
 568                                 (unsigned long long) td->o.rw_min_bs;
 569                 num_maps = (blocks + BLOCKS_PER_MAP - 1) /
 570                                 (unsigned long long) BLOCKS_PER_MAP;
 571                 f->file_map = smalloc(num_maps * sizeof(long));
 572                 if (!f->file_map) {
 573                         log_err("fio: failed allocating random map. If running"
 574                                 " a large number of jobs, try the 'norandommap'"
 575                                 " option\n");
 576                         return 1;
 577                 }
 578                 f->num_maps = num_maps;
 579         }
 580
 581         return 0;
 582 }
 583
 584 void close_files(struct thread_data *td)
 585 {
 586         struct fio_file *f;
 587         unsigned int i;
 588
 589         for_each_file(td, f, i)
 590                 td_io_close_file(td, f);
 591 }
 592
 593 void close_and_free_files(struct thread_data *td)
 594 {
 595         struct fio_file *f;
 596         unsigned int i;
 597
 598         dprint(FD_FILE, "close files\n");
 599
 600         for_each_file(td, f, i) {
 601                 if (td->o.unlink && f->filetype == FIO_TYPE_FILE)
 602                         unlink(f->file_name);
 603
 604                 td_io_close_file(td, f);
 605
 606                 sfree(f->file_name);
 607                 f->file_name = NULL;
 608
 609                 if (f->file_map) {
 610                         sfree(f->file_map);
 611                         f->file_map = NULL;
 612                 }
 613                 sfree(f);
 614         }
 615
 616         td->o.filename = NULL;
 617         free(td->files);
 618         td->files_index = 0;
 619         td->files = NULL;
 620         td->o.nr_files = 0;
 621 }
 622
 623 static void get_file_type(struct fio_file *f)
 624 {
 625         struct stat sb;
 626
 627         if (!strcmp(f->file_name, "-"))
 628                 f->filetype = FIO_TYPE_PIPE;
 629         else
 630                 f->filetype = FIO_TYPE_FILE;
 631
 632         if (!lstat(f->file_name, &sb)) {
 633                 if (S_ISBLK(sb.st_mode))
 634                         f->filetype = FIO_TYPE_BD;
 635                 else if (S_ISCHR(sb.st_mode))
 636                         f->filetype = FIO_TYPE_CHAR;
 637                 else if (S_ISFIFO(sb.st_mode))
 638                         f->filetype = FIO_TYPE_PIPE;
 639         }
 640 }
 641
 642 int add_file(struct thread_data *td, const char *fname)
 643 {
 644         int cur_files = td->files_index;
 645         char file_name[PATH_MAX];
 646         struct fio_file *f;
 647         int len = 0;
 648
 649         dprint(FD_FILE, "add file %s\n", fname);
 650
 651         f = smalloc(sizeof(*f));
 652         f->fd = -1;
 653
 654         dprint(FD_FILE, "resize file array to %d files\n", cur_files + 1);
 655
 656         td->files = realloc(td->files, (cur_files + 1) * sizeof(f));
 657         td->files[cur_files] = f;
 658
 659         /*
 660          * init function, io engine may not be loaded yet
 661          */
 662         if (td->io_ops && (td->io_ops->flags & FIO_DISKLESSIO))
 663                 f->real_file_size = -1ULL;
 664
 665         if (td->o.directory)
 666                 len = sprintf(file_name, "%s/", td->o.directory);
 667
 668         sprintf(file_name + len, "%s", fname);
 669         f->file_name = smalloc_strdup(file_name);
 670
 671         get_file_type(f);
 672
 673         switch (td->o.file_lock_mode) {
 674         case FILE_LOCK_NONE:
 675                 break;
 676         case FILE_LOCK_READWRITE:
 677                 f->lock = fio_mutex_rw_init();
 678                 break;
 679         case FILE_LOCK_EXCLUSIVE:
 680                 f->lock = fio_mutex_init(1);
 681                 break;
 682         default:
 683                 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
 684                 assert(0);
 685         }
 686
 687         td->files_index++;
 688         if (f->filetype == FIO_TYPE_FILE)
 689                 td->nr_normal_files++;
 690
 691         dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name,
 692                                                         cur_files);
 693
 694         return cur_files;
 695 }
 696
 697 void get_file(struct fio_file *f)
 698 {
 699         dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
 700         assert(f->flags & FIO_FILE_OPEN);
 701         f->references++;
 702 }
 703
 704 int put_file(struct thread_data *td, struct fio_file *f)
 705 {
 706         int f_ret = 0, ret = 0;
 707
 708         dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
 709
 710         if (!(f->flags & FIO_FILE_OPEN))
 711                 return 0;
 712
 713         assert(f->references);
 714         if (--f->references)
 715                 return 0;
 716
 717         if (should_fsync(td) && td->o.fsync_on_close)
 718                 f_ret = fsync(f->fd);
 719
 720         if (td->io_ops->close_file)
 721                 ret = td->io_ops->close_file(td, f);
 722
 723         if (!ret)
 724                 ret = !f_ret;
 725
 726         td->nr_open_files--;
 727         f->flags &= ~FIO_FILE_OPEN;
 728         return ret;
 729 }
 730
 731 void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
 732 {
 733         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
 734                 return;
 735
 736         if (f->lock_owner == td && f->lock_batch--)
 737                 return;
 738
 739         if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
 740                 if (ddir == DDIR_READ)
 741                         fio_mutex_down_read(f->lock);
 742                 else
 743                         fio_mutex_down_write(f->lock);
 744         } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
 745                 fio_mutex_down(f->lock);
 746
 747         f->lock_owner = td;
 748         f->lock_batch = td->o.lockfile_batch;
 749         f->lock_ddir = ddir;
 750 }
 751
 752 void unlock_file(struct thread_data *td, struct fio_file *f)
 753 {
 754         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
 755                 return;
 756         if (f->lock_batch)
 757                 return;
 758
 759         if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
 760                 const int is_read = f->lock_ddir == DDIR_READ;
 761                 int val = fio_mutex_getval(f->lock);
 762
 763                 if ((is_read && val == 1) || (!is_read && val == -1))
 764                         f->lock_owner = NULL;
 765
 766                 if (is_read)
 767                         fio_mutex_up_read(f->lock);
 768                 else
 769                         fio_mutex_up_write(f->lock);
 770         } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE) {
 771                 int val = fio_mutex_getval(f->lock);
 772
 773                 if (val == 0)
 774                         f->lock_owner = NULL;
 775
 776                 fio_mutex_up(f->lock);
 777         }
 778 }
 779
 780 void unlock_file_all(struct thread_data *td, struct fio_file *f)
 781 {
 782         if (f->lock_owner != td)
 783                 return;
 784
 785         f->lock_batch = 0;
 786         unlock_file(td, f);
 787 }
 788
 789 static int recurse_dir(struct thread_data *td, const char *dirname)
 790 {
 791         struct dirent *dir;
 792         int ret = 0;
 793         DIR *D;
 794
 795         D = opendir(dirname);
 796         if (!D) {
 797                 char buf[FIO_VERROR_SIZE];
 798
 799                 snprintf(buf, FIO_VERROR_SIZE - 1, "opendir(%s)", dirname);
 800                 td_verror(td, errno, buf);
 801                 return 1;
 802         }
 803
 804         while ((dir = readdir(D)) != NULL) {
 805                 char full_path[PATH_MAX];
 806                 struct stat sb;
 807
 808                 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
 809                         continue;
 810
 811                 sprintf(full_path, "%s/%s", dirname, dir->d_name);
 812
 813                 if (lstat(full_path, &sb) == -1) {
 814                         if (errno != ENOENT) {
 815                                 td_verror(td, errno, "stat");
 816                                 return 1;
 817                         }
 818                 }
 819
 820                 if (S_ISREG(sb.st_mode)) {
 821                         add_file(td, full_path);
 822                         td->o.nr_files++;
 823                         continue;
 824                 }
 825                 if (!S_ISDIR(sb.st_mode))
 826                         continue;
 827
 828                 ret = recurse_dir(td, full_path);
 829                 if (ret)
 830                         break;
 831         }
 832
 833         closedir(D);
 834         return ret;
 835 }
 836
 837 int add_dir_files(struct thread_data *td, const char *path)
 838 {
 839         int ret = recurse_dir(td, path);
 840
 841         if (!ret)
 842                 log_info("fio: opendir added %d files\n", td->o.nr_files);
 843
 844         return ret;
 845 }
 846
 847 void dup_files(struct thread_data *td, struct thread_data *org)
 848 {
 849         struct fio_file *f;
 850         unsigned int i;
 851
 852         dprint(FD_FILE, "dup files: %d\n", org->files_index);
 853
 854         if (!org->files)
 855                 return;
 856
 857         td->files = malloc(org->files_index * sizeof(f));
 858
 859         for_each_file(org, f, i) {
 860                 struct fio_file *__f;
 861
 862                 __f = smalloc(sizeof(*__f));
 863
 864                 if (f->file_name)
 865                         __f->file_name = smalloc_strdup(f->file_name);
 866
 867                 td->files[i] = __f;
 868         }
 869 }
 870
 871 /*
 872  * Returns the index that matches the filename, or -1 if not there
 873  */
 874 int get_fileno(struct thread_data *td, const char *fname)
 875 {
 876         struct fio_file *f;
 877         unsigned int i;
 878
 879         for_each_file(td, f, i)
 880                 if (!strcmp(f->file_name, fname))
 881                         return i;
 882
 883         return -1;
 884 }
 885
 886 /*
 887  * For log usage, where we add/open/close files automatically
 888  */
 889 void free_release_files(struct thread_data *td)
 890 {
 891         close_files(td);
 892         td->files_index = 0;
 893         td->nr_normal_files = 0;
 894 }