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 /*
  17  * Leaves f->fd open on success, caller must close
  18  */
  19 static int extend_file(struct thread_data *td, struct fio_file *f)
  20 {
  21         int r, new_layout = 0, unlink_file = 0, flags;
  22         unsigned long long left;
  23         unsigned int bs;
  24         char *b;
  25
  26         if (read_only) {
  27                 log_err("fio: refusing extend of file due to read-only\n");
  28                 return 0;
  29         }
  30
  31         /*
  32          * check if we need to lay the file out complete again. fio
  33          * does that for operations involving reads, or for writes
  34          * where overwrite is set
  35          */
  36         if (td_read(td) || (td_write(td) && td->o.overwrite) ||
  37             (td_write(td) && td->io_ops->flags & FIO_NOEXTEND))
  38                 new_layout = 1;
  39         if (td_write(td) && !td->o.overwrite)
  40                 unlink_file = 1;
  41
  42         if (unlink_file || new_layout) {
  43                 dprint(FD_FILE, "layout unlink %s\n", f->file_name);
  44                 if ((unlink(f->file_name) < 0) && (errno != ENOENT)) {
  45                         td_verror(td, errno, "unlink");
  46                         return 1;
  47                 }
  48         }
  49
  50         flags = O_WRONLY | O_CREAT;
  51         if (new_layout)
  52                 flags |= O_TRUNC;
  53
  54         dprint(FD_FILE, "open file %s, flags %x\n", f->file_name, flags);
  55         f->fd = open(f->file_name, flags, 0644);
  56         if (f->fd < 0) {
  57                 td_verror(td, errno, "open");
  58                 return 1;
  59         }
  60
  61         if (!new_layout)
  62                 goto done;
  63
  64         dprint(FD_FILE, "truncate file %s, size %llu\n", f->file_name,
  65                                                         f->real_file_size);
  66         if (ftruncate(f->fd, f->real_file_size) == -1) {
  67                 td_verror(td, errno, "ftruncate");
  68                 goto err;
  69         }
  70
  71         dprint(FD_FILE, "fallocate file %s, size %llu\n", f->file_name,
  72                                                         f->real_file_size);
  73         if (posix_fallocate(f->fd, 0, f->real_file_size) < 0) {
  74                 td_verror(td, errno, "posix_fallocate");
  75                 goto err;
  76         }
  77
  78         b = malloc(td->o.max_bs[DDIR_WRITE]);
  79         memset(b, 0, td->o.max_bs[DDIR_WRITE]);
  80
  81         left = f->real_file_size;
  82         while (left && !td->terminate) {
  83                 bs = td->o.max_bs[DDIR_WRITE];
  84                 if (bs > left)
  85                         bs = left;
  86
  87                 r = write(f->fd, b, bs);
  88
  89                 if (r == (int) bs) {
  90                         left -= bs;
  91                         continue;
  92                 } else {
  93                         if (r < 0)
  94                                 td_verror(td, errno, "write");
  95                         else
  96                                 td_verror(td, EIO, "write");
  97
  98                         break;
  99                 }
 100         }
 101
 102         if (td->terminate) {
 103                 dprint(FD_FILE, "terminate unlink %s\n", f->file_name);
 104                 unlink(f->file_name);
 105         } else if (td->o.create_fsync) {
 106                 if (fsync(f->fd) < 0) {
 107                         td_verror(td, errno, "fsync");
 108                         goto err;
 109                 }
 110         }
 111
 112         free(b);
 113 done:
 114         return 0;
 115 err:
 116         close(f->fd);
 117         f->fd = -1;
 118         return 1;
 119 }
 120
 121 static unsigned long long get_rand_file_size(struct thread_data *td)
 122 {
 123         unsigned long long ret, size_d;
 124         long r;
 125
 126         r = os_random_long(&td->file_size_state);
 127         size_d = td->o.file_size_high - td->o.file_size_low;
 128         ret = (unsigned long long) ((double) size_d * (r / (RAND_MAX + 1.0)));
 129         ret += td->o.file_size_low;
 130         ret -= (ret % td->o.rw_min_bs);
 131         return ret;
 132 }
 133
 134 static int file_size(struct thread_data *td, struct fio_file *f)
 135 {
 136         struct stat st;
 137
 138         if (fstat(f->fd, &st) == -1) {
 139                 td_verror(td, errno, "fstat");
 140                 return 1;
 141         }
 142
 143         f->real_file_size = st.st_size;
 144         return 0;
 145 }
 146
 147 static int bdev_size(struct thread_data *td, struct fio_file *f)
 148 {
 149         unsigned long long bytes;
 150         int r;
 151
 152         r = blockdev_size(f->fd, &bytes);
 153         if (r) {
 154                 td_verror(td, r, "blockdev_size");
 155                 return 1;
 156         }
 157
 158         f->real_file_size = bytes;
 159         return 0;
 160 }
 161
 162 static int get_file_size(struct thread_data *td, struct fio_file *f)
 163 {
 164         int ret = 0;
 165
 166         if (f->flags & FIO_SIZE_KNOWN)
 167                 return 0;
 168
 169         if (f->filetype == FIO_TYPE_FILE)
 170                 ret = file_size(td, f);
 171         else if (f->filetype == FIO_TYPE_BD)
 172                 ret = bdev_size(td, f);
 173         else
 174                 f->real_file_size = -1;
 175
 176         if (ret)
 177                 return ret;
 178
 179         if (f->file_offset > f->real_file_size) {
 180                 log_err("%s: offset extends end (%Lu > %Lu)\n", td->o.name,
 181                                         f->file_offset, f->real_file_size);
 182                 return 1;
 183         }
 184
 185         f->flags |= FIO_SIZE_KNOWN;
 186         return 0;
 187 }
 188
 189 static int __file_invalidate_cache(struct thread_data *td, struct fio_file *f,
 190                                    unsigned long long off,
 191                                    unsigned long long len)
 192 {
 193         int ret = 0;
 194
 195         if (len == -1ULL)
 196                 len = f->io_size;
 197         if (off == -1ULL)
 198                 off = f->file_offset;
 199
 200         dprint(FD_IO, "invalidate cache %s: %llu/%llu\n", f->file_name, off,
 201                                                                 len);
 202
 203         /*
 204          * FIXME: add blockdev flushing too
 205          */
 206         if (f->mmap)
 207                 ret = madvise(f->mmap, len, MADV_DONTNEED);
 208         else if (f->filetype == FIO_TYPE_FILE) {
 209                 ret = fadvise(f->fd, off, len, POSIX_FADV_DONTNEED);
 210         } else if (f->filetype == FIO_TYPE_BD) {
 211                 ret = blockdev_invalidate_cache(f->fd);
 212                 if (ret < 0 && errno == EACCES && geteuid()) {
 213                         if (!root_warn) {
 214                                 log_err("fio: only root may flush block "
 215                                         "devices. Cache flush bypassed!\n");
 216                                 root_warn = 1;
 217                         }
 218                         ret = 0;
 219                 }
 220         } else if (f->filetype == FIO_TYPE_CHAR || f->filetype == FIO_TYPE_PIPE)
 221                 ret = 0;
 222
 223         if (ret < 0) {
 224                 td_verror(td, errno, "invalidate_cache");
 225                 return 1;
 226         } else if (ret > 0) {
 227                 td_verror(td, ret, "invalidate_cache");
 228                 return 1;
 229         }
 230
 231         return ret;
 232
 233 }
 234
 235 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
 236 {
 237         return __file_invalidate_cache(td, f, -1, -1);
 238 }
 239
 240 int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
 241 {
 242         int ret = 0;
 243
 244         dprint(FD_FILE, "fd close %s\n", f->file_name);
 245
 246         remove_file_hash(f);
 247
 248         if (close(f->fd) < 0)
 249                 ret = errno;
 250
 251         f->fd = -1;
 252         return ret;
 253 }
 254
 255 static int file_lookup_open(struct fio_file *f, int flags)
 256 {
 257         struct fio_file *__f;
 258         int from_hash;
 259
 260         __f = lookup_file_hash(f->file_name);
 261         if (__f) {
 262                 dprint(FD_FILE, "found file in hash %s\n", f->file_name);
 263                 /*
 264                  * racy, need the __f->lock locked
 265                  */
 266                 f->lock = __f->lock;
 267                 f->lock_owner = __f->lock_owner;
 268                 f->lock_batch = __f->lock_batch;
 269                 f->lock_ddir = __f->lock_ddir;
 270                 from_hash = 1;
 271         } else {
 272                 dprint(FD_FILE, "file not found in hash %s\n", f->file_name);
 273                 from_hash = 0;
 274         }
 275
 276         f->fd = open(f->file_name, flags, 0600);
 277         return from_hash;
 278 }
 279
 280 int generic_open_file(struct thread_data *td, struct fio_file *f)
 281 {
 282         int is_std = 0;
 283         int flags = 0;
 284         int from_hash = 0;
 285
 286         dprint(FD_FILE, "fd open %s\n", f->file_name);
 287
 288         if (!strcmp(f->file_name, "-")) {
 289                 if (td_rw(td)) {
 290                         log_err("fio: can't read/write to stdin/out\n");
 291                         return 1;
 292                 }
 293                 is_std = 1;
 294
 295                 /*
 296                  * move output logging to stderr, if we are writing to stdout
 297                  */
 298                 if (td_write(td))
 299                         f_out = stderr;
 300         }
 301
 302         if (td->o.odirect)
 303                 flags |= OS_O_DIRECT;
 304         if (td->o.sync_io)
 305                 flags |= O_SYNC;
 306         if (f->filetype != FIO_TYPE_FILE)
 307                 flags |= O_NOATIME;
 308
 309 open_again:
 310         if (td_write(td)) {
 311                 if (!read_only)
 312                         flags |= O_RDWR;
 313
 314                 if (f->filetype == FIO_TYPE_FILE)
 315                         flags |= O_CREAT;
 316
 317                 if (is_std)
 318                         f->fd = dup(STDOUT_FILENO);
 319                 else
 320                         from_hash = file_lookup_open(f, flags);
 321         } else {
 322                 if (f->filetype == FIO_TYPE_CHAR && !read_only)
 323                         flags |= O_RDWR;
 324                 else
 325                         flags |= O_RDONLY;
 326
 327                 if (is_std)
 328                         f->fd = dup(STDIN_FILENO);
 329                 else
 330                         from_hash = file_lookup_open(f, flags);
 331         }
 332
 333         if (f->fd == -1) {
 334                 char buf[FIO_VERROR_SIZE];
 335                 int __e = errno;
 336
 337                 if (errno == EPERM && (flags & O_NOATIME)) {
 338                         flags &= ~O_NOATIME;
 339                         goto open_again;
 340                 }
 341
 342                 snprintf(buf, sizeof(buf) - 1, "open(%s)", f->file_name);
 343
 344                 td_verror(td, __e, buf);
 345         }
 346
 347         if (get_file_size(td, f))
 348                 goto err;
 349
 350         if (!from_hash && f->fd != -1) {
 351                 if (add_file_hash(f)) {
 352                         int ret;
 353
 354                         /*
 355                          * OK to ignore, we haven't done anything with it
 356                          */
 357                         ret = generic_close_file(td, f);
 358                         goto open_again;
 359                 }
 360         }
 361
 362         return 0;
 363 err:
 364         close(f->fd);
 365         return 1;
 366 }
 367
 368 int open_files(struct thread_data *td)
 369 {
 370         struct fio_file *f;
 371         unsigned int i;
 372         int err = 0;
 373
 374         dprint(FD_FILE, "open files\n");
 375
 376         for_each_file(td, f, i) {
 377                 err = td_io_open_file(td, f);
 378                 if (err) {
 379                         if (td->error == EMFILE) {
 380                                 log_err("fio: limited open files to: %d\n",
 381                                                         td->nr_open_files);
 382                                 td->o.open_files = td->nr_open_files;
 383                                 err = 0;
 384                                 clear_error(td);
 385                         }
 386                         break;
 387                 }
 388
 389                 if (td->o.open_files == td->nr_open_files)
 390                         break;
 391         }
 392
 393         if (!err)
 394                 return 0;
 395
 396         for_each_file(td, f, i)
 397                 td_io_close_file(td, f);
 398
 399         return err;
 400 }
 401
 402 /*
 403  * open/close all files, so that ->real_file_size gets set
 404  */
 405 static int get_file_sizes(struct thread_data *td)
 406 {
 407         struct fio_file *f;
 408         unsigned int i;
 409         int err = 0;
 410
 411         for_each_file(td, f, i) {
 412                 dprint(FD_FILE, "get file size for %p/%d/%p\n", f, i,
 413                                                                 f->file_name);
 414
 415                 if (td->io_ops->open_file(td, f)) {
 416                         if (td->error != ENOENT) {
 417                                 log_err("%s\n", td->verror);
 418                                 err = 1;
 419                         }
 420                         clear_error(td);
 421                 } else {
 422                         if (td->io_ops->close_file)
 423                                 td->io_ops->close_file(td, f);
 424                 }
 425
 426                 if (f->real_file_size == -1ULL && td->o.size)
 427                         f->real_file_size = td->o.size / td->o.nr_files;
 428         }
 429
 430         return err;
 431 }
 432
 433 /*
 434  * Open the files and setup files sizes, creating files if necessary.
 435  */
 436 int setup_files(struct thread_data *td)
 437 {
 438         unsigned long long total_size, extend_size;
 439         struct fio_file *f;
 440         unsigned int i;
 441         int err = 0, need_extend;
 442
 443         dprint(FD_FILE, "setup files\n");
 444
 445         if (td->o.read_iolog_file)
 446                 return 0;
 447
 448         /*
 449          * if ioengine defines a setup() method, it's responsible for
 450          * opening the files and setting f->real_file_size to indicate
 451          * the valid range for that file.
 452          */
 453         if (td->io_ops->setup)
 454                 err = td->io_ops->setup(td);
 455         else
 456                 err = get_file_sizes(td);
 457
 458         if (err)
 459                 return err;
 460
 461         /*
 462          * check sizes. if the files/devices do not exist and the size
 463          * isn't passed to fio, abort.
 464          */
 465         total_size = 0;
 466         for_each_file(td, f, i) {
 467                 if (f->real_file_size == -1ULL)
 468                         total_size = -1ULL;
 469                 else
 470                         total_size += f->real_file_size;
 471         }
 472
 473         /*
 474          * device/file sizes are zero and no size given, punt
 475          */
 476         if ((!total_size || total_size == -1ULL) && !td->o.size &&
 477             !(td->io_ops->flags & FIO_NOIO) && !td->o.fill_device) {
 478                 log_err("%s: you need to specify size=\n", td->o.name);
 479                 td_verror(td, EINVAL, "total_file_size");
 480                 return 1;
 481         }
 482
 483         /*
 484          * now file sizes are known, so we can set ->io_size. if size= is
 485          * not given, ->io_size is just equal to ->real_file_size. if size
 486          * is given, ->io_size is size / nr_files.
 487          */
 488         extend_size = total_size = 0;
 489         need_extend = 0;
 490         for_each_file(td, f, i) {
 491                 f->file_offset = td->o.start_offset;
 492
 493                 if (!td->o.file_size_low) {
 494                         /*
 495                          * no file size range given, file size is equal to
 496                          * total size divided by number of files. if that is
 497                          * zero, set it to the real file size.
 498                          */
 499                         f->io_size = td->o.size / td->o.nr_files;
 500                         if (!f->io_size)
 501                                 f->io_size = f->real_file_size - f->file_offset;
 502                 } else if (f->real_file_size < td->o.file_size_low ||
 503                            f->real_file_size > td->o.file_size_high) {
 504                         if (f->file_offset > td->o.file_size_low)
 505                                 goto err_offset;
 506                         /*
 507                          * file size given. if it's fixed, use that. if it's a
 508                          * range, generate a random size in-between.
 509                          */
 510                         if (td->o.file_size_low == td->o.file_size_high) {
 511                                 f->io_size = td->o.file_size_low
 512                                                 - f->file_offset;
 513                         } else {
 514                                 f->io_size = get_rand_file_size(td)
 515                                                 - f->file_offset;
 516                         }
 517                 } else
 518                         f->io_size = f->real_file_size - f->file_offset;
 519
 520                 if (f->io_size == -1ULL)
 521                         total_size = -1ULL;
 522                 else
 523                         total_size += f->io_size;
 524
 525                 if (f->filetype == FIO_TYPE_FILE &&
 526                     (f->io_size + f->file_offset) > f->real_file_size &&
 527                     !(td->io_ops->flags & FIO_DISKLESSIO)) {
 528                         need_extend++;
 529                         extend_size += (f->io_size + f->file_offset);
 530                         f->flags |= FIO_FILE_EXTEND;
 531                 }
 532         }
 533
 534         if (!td->o.size || td->o.size > total_size)
 535                 td->o.size = total_size;
 536
 537         /*
 538          * See if we need to extend some files
 539          */
 540         if (need_extend) {
 541                 temp_stall_ts = 1;
 542                 log_info("%s: Laying out IO file(s) (%u file(s) / %LuMiB)\n",
 543                         td->o.name, need_extend, extend_size >> 20);
 544
 545                 for_each_file(td, f, i) {
 546                         unsigned long long old_len, extend_len;
 547
 548                         if (!(f->flags & FIO_FILE_EXTEND))
 549                                 continue;
 550
 551                         assert(f->filetype == FIO_TYPE_FILE);
 552                         f->flags &= ~FIO_FILE_EXTEND;
 553                         old_len = f->real_file_size;
 554                         extend_len = f->io_size + f->file_offset - old_len;
 555                         f->real_file_size = (f->io_size + f->file_offset);
 556                         err = extend_file(td, f);
 557                         if (err)
 558                                 break;
 559
 560                         err = __file_invalidate_cache(td, f, old_len,
 561                                                                 extend_len);
 562                         close(f->fd);
 563                         f->fd = -1;
 564                         if (err)
 565                                 break;
 566                 }
 567                 temp_stall_ts = 0;
 568         }
 569
 570         if (err)
 571                 return err;
 572
 573         if (!td->o.zone_size)
 574                 td->o.zone_size = td->o.size;
 575
 576         /*
 577          * iolog already set the total io size, if we read back
 578          * stored entries.
 579          */
 580         if (!td->o.read_iolog_file)
 581                 td->total_io_size = td->o.size * td->o.loops;
 582         return 0;
 583 err_offset:
 584         log_err("%s: you need to specify valid offset=\n", td->o.name);
 585         return 1;
 586 }
 587
 588 int init_random_map(struct thread_data *td)
 589 {
 590         unsigned long long blocks, num_maps;
 591         struct fio_file *f;
 592         unsigned int i;
 593
 594         if (td->o.norandommap || !td_random(td))
 595                 return 0;
 596
 597         for_each_file(td, f, i) {
 598                 blocks = (f->real_file_size + td->o.rw_min_bs - 1) /
 599                                 (unsigned long long) td->o.rw_min_bs;
 600                 num_maps = (blocks + BLOCKS_PER_MAP - 1) /
 601                                 (unsigned long long) BLOCKS_PER_MAP;
 602                 f->file_map = smalloc(num_maps * sizeof(long));
 603                 if (f->file_map) {
 604                         f->num_maps = num_maps;
 605                         continue;
 606                 }
 607                 if (!td->o.softrandommap) {
 608                         log_err("fio: failed allocating random map. If running"
 609                                 " a large number of jobs, try the 'norandommap'"
 610                                 " option or set 'softrandommap'. Or give"
 611                                 " a larger --alloc-size to fio.\n");
 612                         return 1;
 613                 }
 614
 615                 log_info("fio: file %s failed allocating random map. Running "
 616                          "job without.\n", f->file_name);
 617                 f->num_maps = 0;
 618         }
 619
 620         return 0;
 621 }
 622
 623 void close_files(struct thread_data *td)
 624 {
 625         struct fio_file *f;
 626         unsigned int i;
 627
 628         for_each_file(td, f, i)
 629                 td_io_close_file(td, f);
 630 }
 631
 632 void close_and_free_files(struct thread_data *td)
 633 {
 634         struct fio_file *f;
 635         unsigned int i;
 636
 637         dprint(FD_FILE, "close files\n");
 638
 639         for_each_file(td, f, i) {
 640                 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
 641                         dprint(FD_FILE, "free unlink %s\n", f->file_name);
 642                         unlink(f->file_name);
 643                 }
 644
 645                 td_io_close_file(td, f);
 646
 647                 sfree(f->file_name);
 648                 f->file_name = NULL;
 649
 650                 if (f->file_map) {
 651                         sfree(f->file_map);
 652                         f->file_map = NULL;
 653                 }
 654                 sfree(f);
 655         }
 656
 657         td->o.filename = NULL;
 658         free(td->files);
 659         td->files_index = 0;
 660         td->files = NULL;
 661         td->o.nr_files = 0;
 662 }
 663
 664 static void get_file_type(struct fio_file *f)
 665 {
 666         struct stat sb;
 667
 668         if (!strcmp(f->file_name, "-"))
 669                 f->filetype = FIO_TYPE_PIPE;
 670         else
 671                 f->filetype = FIO_TYPE_FILE;
 672
 673         if (!lstat(f->file_name, &sb)) {
 674                 if (S_ISBLK(sb.st_mode))
 675                         f->filetype = FIO_TYPE_BD;
 676                 else if (S_ISCHR(sb.st_mode))
 677                         f->filetype = FIO_TYPE_CHAR;
 678                 else if (S_ISFIFO(sb.st_mode))
 679                         f->filetype = FIO_TYPE_PIPE;
 680         }
 681 }
 682
 683 int add_file(struct thread_data *td, const char *fname)
 684 {
 685         int cur_files = td->files_index;
 686         char file_name[PATH_MAX];
 687         struct fio_file *f;
 688         int len = 0;
 689
 690         dprint(FD_FILE, "add file %s\n", fname);
 691
 692         f = smalloc(sizeof(*f));
 693         f->fd = -1;
 694
 695         dprint(FD_FILE, "resize file array to %d files\n", cur_files + 1);
 696
 697         td->files = realloc(td->files, (cur_files + 1) * sizeof(f));
 698         td->files[cur_files] = f;
 699
 700         /*
 701          * init function, io engine may not be loaded yet
 702          */
 703         if (td->io_ops && (td->io_ops->flags & FIO_DISKLESSIO))
 704                 f->real_file_size = -1ULL;
 705
 706         if (td->o.directory)
 707                 len = sprintf(file_name, "%s/", td->o.directory);
 708
 709         sprintf(file_name + len, "%s", fname);
 710         f->file_name = smalloc_strdup(file_name);
 711
 712         get_file_type(f);
 713
 714         switch (td->o.file_lock_mode) {
 715         case FILE_LOCK_NONE:
 716                 break;
 717         case FILE_LOCK_READWRITE:
 718                 f->lock = fio_mutex_rw_init();
 719                 break;
 720         case FILE_LOCK_EXCLUSIVE:
 721                 f->lock = fio_mutex_init(1);
 722                 break;
 723         default:
 724                 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
 725                 assert(0);
 726         }
 727
 728         td->files_index++;
 729         if (f->filetype == FIO_TYPE_FILE)
 730                 td->nr_normal_files++;
 731
 732         dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name,
 733                                                         cur_files);
 734
 735         return cur_files;
 736 }
 737
 738 void get_file(struct fio_file *f)
 739 {
 740         dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
 741         assert(f->flags & FIO_FILE_OPEN);
 742         f->references++;
 743 }
 744
 745 int put_file(struct thread_data *td, struct fio_file *f)
 746 {
 747         int f_ret = 0, ret = 0;
 748
 749         dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
 750
 751         if (!(f->flags & FIO_FILE_OPEN))
 752                 return 0;
 753
 754         assert(f->references);
 755         if (--f->references)
 756                 return 0;
 757
 758         if (should_fsync(td) && td->o.fsync_on_close)
 759                 f_ret = fsync(f->fd);
 760
 761         if (td->io_ops->close_file)
 762                 ret = td->io_ops->close_file(td, f);
 763
 764         if (!ret)
 765                 ret = !f_ret;
 766
 767         td->nr_open_files--;
 768         f->flags &= ~FIO_FILE_OPEN;
 769         return ret;
 770 }
 771
 772 void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
 773 {
 774         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
 775                 return;
 776
 777         if (f->lock_owner == td && f->lock_batch--)
 778                 return;
 779
 780         if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
 781                 if (ddir == DDIR_READ)
 782                         fio_mutex_down_read(f->lock);
 783                 else
 784                         fio_mutex_down_write(f->lock);
 785         } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
 786                 fio_mutex_down(f->lock);
 787
 788         f->lock_owner = td;
 789         f->lock_batch = td->o.lockfile_batch;
 790         f->lock_ddir = ddir;
 791 }
 792
 793 void unlock_file(struct thread_data *td, struct fio_file *f)
 794 {
 795         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
 796                 return;
 797         if (f->lock_batch)
 798                 return;
 799
 800         if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
 801                 const int is_read = f->lock_ddir == DDIR_READ;
 802                 int val = fio_mutex_getval(f->lock);
 803
 804                 if ((is_read && val == 1) || (!is_read && val == -1))
 805                         f->lock_owner = NULL;
 806
 807                 if (is_read)
 808                         fio_mutex_up_read(f->lock);
 809                 else
 810                         fio_mutex_up_write(f->lock);
 811         } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE) {
 812                 int val = fio_mutex_getval(f->lock);
 813
 814                 if (val == 0)
 815                         f->lock_owner = NULL;
 816
 817                 fio_mutex_up(f->lock);
 818         }
 819 }
 820
 821 void unlock_file_all(struct thread_data *td, struct fio_file *f)
 822 {
 823         if (f->lock_owner != td)
 824                 return;
 825
 826         f->lock_batch = 0;
 827         unlock_file(td, f);
 828 }
 829
 830 static int recurse_dir(struct thread_data *td, const char *dirname)
 831 {
 832         struct dirent *dir;
 833         int ret = 0;
 834         DIR *D;
 835
 836         D = opendir(dirname);
 837         if (!D) {
 838                 char buf[FIO_VERROR_SIZE];
 839
 840                 snprintf(buf, FIO_VERROR_SIZE - 1, "opendir(%s)", dirname);
 841                 td_verror(td, errno, buf);
 842                 return 1;
 843         }
 844
 845         while ((dir = readdir(D)) != NULL) {
 846                 char full_path[PATH_MAX];
 847                 struct stat sb;
 848
 849                 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
 850                         continue;
 851
 852                 sprintf(full_path, "%s/%s", dirname, dir->d_name);
 853
 854                 if (lstat(full_path, &sb) == -1) {
 855                         if (errno != ENOENT) {
 856                                 td_verror(td, errno, "stat");
 857                                 return 1;
 858                         }
 859                 }
 860
 861                 if (S_ISREG(sb.st_mode)) {
 862                         add_file(td, full_path);
 863                         td->o.nr_files++;
 864                         continue;
 865                 }
 866                 if (!S_ISDIR(sb.st_mode))
 867                         continue;
 868
 869                 ret = recurse_dir(td, full_path);
 870                 if (ret)
 871                         break;
 872         }
 873
 874         closedir(D);
 875         return ret;
 876 }
 877
 878 int add_dir_files(struct thread_data *td, const char *path)
 879 {
 880         int ret = recurse_dir(td, path);
 881
 882         if (!ret)
 883                 log_info("fio: opendir added %d files\n", td->o.nr_files);
 884
 885         return ret;
 886 }
 887
 888 void dup_files(struct thread_data *td, struct thread_data *org)
 889 {
 890         struct fio_file *f;
 891         unsigned int i;
 892
 893         dprint(FD_FILE, "dup files: %d\n", org->files_index);
 894
 895         if (!org->files)
 896                 return;
 897
 898         td->files = malloc(org->files_index * sizeof(f));
 899
 900         for_each_file(org, f, i) {
 901                 struct fio_file *__f;
 902
 903                 __f = smalloc(sizeof(*__f));
 904
 905                 if (f->file_name)
 906                         __f->file_name = smalloc_strdup(f->file_name);
 907
 908                 td->files[i] = __f;
 909         }
 910 }
 911
 912 /*
 913  * Returns the index that matches the filename, or -1 if not there
 914  */
 915 int get_fileno(struct thread_data *td, const char *fname)
 916 {
 917         struct fio_file *f;
 918         unsigned int i;
 919
 920         for_each_file(td, f, i)
 921                 if (!strcmp(f->file_name, fname))
 922                         return i;
 923
 924         return -1;
 925 }
 926
 927 /*
 928  * For log usage, where we add/open/close files automatically
 929  */
 930 void free_release_files(struct thread_data *td)
 931 {
 932         close_files(td);
 933         td->files_index = 0;
 934         td->nr_normal_files = 0;
 935 }