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 #ifdef FIO_HAVE_FALLOCATE
  72         dprint(FD_FILE, "fallocate file %s, size %llu\n", f->file_name,
  73                                                         f->real_file_size);
  74         r = posix_fallocate(f->fd, 0, f->real_file_size);
  75         if (r < 0)
  76                 log_err("fio: posix_fallocate fails: %s\n", strerror(-r));
  77 #endif
  78
  79         b = malloc(td->o.max_bs[DDIR_WRITE]);
  80         memset(b, 0, td->o.max_bs[DDIR_WRITE]);
  81
  82         left = f->real_file_size;
  83         while (left && !td->terminate) {
  84                 bs = td->o.max_bs[DDIR_WRITE];
  85                 if (bs > left)
  86                         bs = left;
  87
  88                 r = write(f->fd, b, bs);
  89
  90                 if (r == (int) bs) {
  91                         left -= bs;
  92                         continue;
  93                 } else {
  94                         if (r < 0)
  95                                 td_verror(td, errno, "write");
  96                         else
  97                                 td_verror(td, EIO, "write");
  98
  99                         break;
 100                 }
 101         }
 102
 103         if (td->terminate) {
 104                 dprint(FD_FILE, "terminate unlink %s\n", f->file_name);
 105                 unlink(f->file_name);
 106         } else if (td->o.create_fsync) {
 107                 if (fsync(f->fd) < 0) {
 108                         td_verror(td, errno, "fsync");
 109                         goto err;
 110                 }
 111         }
 112
 113         free(b);
 114 done:
 115         return 0;
 116 err:
 117         close(f->fd);
 118         f->fd = -1;
 119         return 1;
 120 }
 121
 122 static unsigned long long get_rand_file_size(struct thread_data *td)
 123 {
 124         unsigned long long ret, sized;
 125         long r;
 126
 127         r = os_random_long(&td->file_size_state);
 128         sized = td->o.file_size_high - td->o.file_size_low;
 129         ret = (unsigned long long) ((double) sized * (r / (OS_RAND_MAX + 1.0)));
 130         ret += td->o.file_size_low;
 131         ret -= (ret % td->o.rw_min_bs);
 132         return ret;
 133 }
 134
 135 static int file_size(struct thread_data *td, struct fio_file *f)
 136 {
 137         struct stat st;
 138
 139         if (fstat(f->fd, &st) == -1) {
 140                 td_verror(td, errno, "fstat");
 141                 return 1;
 142         }
 143
 144         f->real_file_size = st.st_size;
 145         return 0;
 146 }
 147
 148 static int bdev_size(struct thread_data *td, struct fio_file *f)
 149 {
 150         unsigned long long bytes;
 151         int r;
 152
 153         r = blockdev_size(f->fd, &bytes);
 154         if (r) {
 155                 td_verror(td, r, "blockdev_size");
 156                 return 1;
 157         }
 158
 159         if (!bytes) {
 160                 log_err("%s: zero sized block device?\n", f->file_name);
 161                 return 1;
 162         }
 163
 164         f->real_file_size = bytes;
 165         return 0;
 166 }
 167
 168 static int get_file_size(struct thread_data *td, struct fio_file *f)
 169 {
 170         int ret = 0;
 171
 172         if (f->flags & FIO_SIZE_KNOWN)
 173                 return 0;
 174
 175         if (f->filetype == FIO_TYPE_FILE)
 176                 ret = file_size(td, f);
 177         else if (f->filetype == FIO_TYPE_BD)
 178                 ret = bdev_size(td, f);
 179         else
 180                 f->real_file_size = -1;
 181
 182         if (ret)
 183                 return ret;
 184
 185         if (f->file_offset > f->real_file_size) {
 186                 log_err("%s: offset extends end (%Lu > %Lu)\n", td->o.name,
 187                                         f->file_offset, f->real_file_size);
 188                 return 1;
 189         }
 190
 191         f->flags |= FIO_SIZE_KNOWN;
 192         return 0;
 193 }
 194
 195 static int __file_invalidate_cache(struct thread_data *td, struct fio_file *f,
 196                                    unsigned long long off,
 197                                    unsigned long long len)
 198 {
 199         int ret = 0;
 200
 201         if (len == -1ULL)
 202                 len = f->io_size;
 203         if (off == -1ULL)
 204                 off = f->file_offset;
 205
 206         dprint(FD_IO, "invalidate cache %s: %llu/%llu\n", f->file_name, off,
 207                                                                 len);
 208
 209         /*
 210          * FIXME: add blockdev flushing too
 211          */
 212         if (f->mmap)
 213                 ret = madvise(f->mmap, len, MADV_DONTNEED);
 214         else if (f->filetype == FIO_TYPE_FILE) {
 215                 ret = fadvise(f->fd, off, len, POSIX_FADV_DONTNEED);
 216         } else if (f->filetype == FIO_TYPE_BD) {
 217                 ret = blockdev_invalidate_cache(f->fd);
 218                 if (ret < 0 && errno == EACCES && geteuid()) {
 219                         if (!root_warn) {
 220                                 log_err("fio: only root may flush block "
 221                                         "devices. Cache flush bypassed!\n");
 222                                 root_warn = 1;
 223                         }
 224                         ret = 0;
 225                 }
 226         } else if (f->filetype == FIO_TYPE_CHAR || f->filetype == FIO_TYPE_PIPE)
 227                 ret = 0;
 228
 229         if (ret < 0) {
 230                 td_verror(td, errno, "invalidate_cache");
 231                 return 1;
 232         } else if (ret > 0) {
 233                 td_verror(td, ret, "invalidate_cache");
 234                 return 1;
 235         }
 236
 237         return ret;
 238
 239 }
 240
 241 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
 242 {
 243         if (!(f->flags & FIO_FILE_OPEN))
 244                 return 0;
 245
 246         return __file_invalidate_cache(td, f, -1, -1);
 247 }
 248
 249 int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
 250 {
 251         int ret = 0;
 252
 253         dprint(FD_FILE, "fd close %s\n", f->file_name);
 254
 255         remove_file_hash(f);
 256
 257         if (close(f->fd) < 0)
 258                 ret = errno;
 259
 260         f->fd = -1;
 261         return ret;
 262 }
 263
 264 static int file_lookup_open(struct fio_file *f, int flags)
 265 {
 266         struct fio_file *__f;
 267         int from_hash;
 268
 269         __f = lookup_file_hash(f->file_name);
 270         if (__f) {
 271                 dprint(FD_FILE, "found file in hash %s\n", f->file_name);
 272                 /*
 273                  * racy, need the __f->lock locked
 274                  */
 275                 f->lock = __f->lock;
 276                 f->lock_owner = __f->lock_owner;
 277                 f->lock_batch = __f->lock_batch;
 278                 f->lock_ddir = __f->lock_ddir;
 279                 from_hash = 1;
 280         } else {
 281                 dprint(FD_FILE, "file not found in hash %s\n", f->file_name);
 282                 from_hash = 0;
 283         }
 284
 285         f->fd = open(f->file_name, flags, 0600);
 286         return from_hash;
 287 }
 288
 289 int generic_open_file(struct thread_data *td, struct fio_file *f)
 290 {
 291         int is_std = 0;
 292         int flags = 0;
 293         int from_hash = 0;
 294
 295         dprint(FD_FILE, "fd open %s\n", f->file_name);
 296
 297         if (!strcmp(f->file_name, "-")) {
 298                 if (td_rw(td)) {
 299                         log_err("fio: can't read/write to stdin/out\n");
 300                         return 1;
 301                 }
 302                 is_std = 1;
 303
 304                 /*
 305                  * move output logging to stderr, if we are writing to stdout
 306                  */
 307                 if (td_write(td))
 308                         f_out = stderr;
 309         }
 310
 311         if (td->o.odirect)
 312                 flags |= OS_O_DIRECT;
 313         if (td->o.sync_io)
 314                 flags |= O_SYNC;
 315         if (f->filetype != FIO_TYPE_FILE)
 316                 flags |= FIO_O_NOATIME;
 317         if (td->o.create_on_open)
 318                 flags |= O_CREAT;
 319
 320 open_again:
 321         if (td_write(td)) {
 322                 if (!read_only)
 323                         flags |= O_RDWR;
 324
 325                 if (f->filetype == FIO_TYPE_FILE)
 326                         flags |= O_CREAT;
 327
 328                 if (is_std)
 329                         f->fd = dup(STDOUT_FILENO);
 330                 else
 331                         from_hash = file_lookup_open(f, flags);
 332         } else {
 333                 if (f->filetype == FIO_TYPE_CHAR && !read_only)
 334                         flags |= O_RDWR;
 335                 else
 336                         flags |= O_RDONLY;
 337
 338                 if (is_std)
 339                         f->fd = dup(STDIN_FILENO);
 340                 else
 341                         from_hash = file_lookup_open(f, flags);
 342         }
 343
 344         if (f->fd == -1) {
 345                 char buf[FIO_VERROR_SIZE];
 346                 int __e = errno;
 347
 348                 if (errno == EPERM && (flags & FIO_O_NOATIME)) {
 349                         flags &= ~FIO_O_NOATIME;
 350                         goto open_again;
 351                 }
 352
 353                 snprintf(buf, sizeof(buf) - 1, "open(%s)", f->file_name);
 354
 355                 td_verror(td, __e, buf);
 356         }
 357
 358         if (get_file_size(td, f))
 359                 goto err;
 360
 361         if (!from_hash && f->fd != -1) {
 362                 if (add_file_hash(f)) {
 363                         int ret;
 364
 365                         /*
 366                          * OK to ignore, we haven't done anything with it
 367                          */
 368                         ret = generic_close_file(td, f);
 369                         goto open_again;
 370                 }
 371         }
 372
 373         return 0;
 374 err:
 375         close(f->fd);
 376         return 1;
 377 }
 378
 379 int open_files(struct thread_data *td)
 380 {
 381         struct fio_file *f;
 382         unsigned int i;
 383         int err = 0;
 384
 385         dprint(FD_FILE, "open files\n");
 386
 387         for_each_file(td, f, i) {
 388                 err = td_io_open_file(td, f);
 389                 if (err) {
 390                         if (td->error == EMFILE) {
 391                                 log_err("fio: limited open files to: %d\n",
 392                                                         td->nr_open_files);
 393                                 td->o.open_files = td->nr_open_files;
 394                                 err = 0;
 395                                 clear_error(td);
 396                         }
 397                         break;
 398                 }
 399
 400                 if (td->o.open_files == td->nr_open_files)
 401                         break;
 402         }
 403
 404         if (!err)
 405                 return 0;
 406
 407         for_each_file(td, f, i)
 408                 td_io_close_file(td, f);
 409
 410         return err;
 411 }
 412
 413 /*
 414  * open/close all files, so that ->real_file_size gets set
 415  */
 416 static int get_file_sizes(struct thread_data *td)
 417 {
 418         struct fio_file *f;
 419         unsigned int i;
 420         int err = 0;
 421
 422         for_each_file(td, f, i) {
 423                 dprint(FD_FILE, "get file size for %p/%d/%p\n", f, i,
 424                                                                 f->file_name);
 425
 426                 if (td->io_ops->open_file(td, f)) {
 427                         if (td->error != ENOENT) {
 428                                 log_err("%s\n", td->verror);
 429                                 err = 1;
 430                         }
 431                         clear_error(td);
 432                 } else {
 433                         if (td->io_ops->close_file)
 434                                 td->io_ops->close_file(td, f);
 435                 }
 436
 437                 if (f->real_file_size == -1ULL && td->o.size)
 438                         f->real_file_size = td->o.size / td->o.nr_files;
 439         }
 440
 441         return err;
 442 }
 443
 444 /*
 445  * Open the files and setup files sizes, creating files if necessary.
 446  */
 447 int setup_files(struct thread_data *td)
 448 {
 449         unsigned long long total_size, extend_size;
 450         struct fio_file *f;
 451         unsigned int i;
 452         int err = 0, need_extend;
 453
 454         dprint(FD_FILE, "setup files\n");
 455
 456         if (td->o.read_iolog_file)
 457                 return 0;
 458
 459         /*
 460          * if ioengine defines a setup() method, it's responsible for
 461          * opening the files and setting f->real_file_size to indicate
 462          * the valid range for that file.
 463          */
 464         if (td->io_ops->setup)
 465                 err = td->io_ops->setup(td);
 466         else
 467                 err = get_file_sizes(td);
 468
 469         if (err)
 470                 return err;
 471
 472         /*
 473          * check sizes. if the files/devices do not exist and the size
 474          * isn't passed to fio, abort.
 475          */
 476         total_size = 0;
 477         for_each_file(td, f, i) {
 478                 if (f->real_file_size == -1ULL)
 479                         total_size = -1ULL;
 480                 else
 481                         total_size += f->real_file_size;
 482         }
 483
 484         /*
 485          * device/file sizes are zero and no size given, punt
 486          */
 487         if ((!total_size || total_size == -1ULL) && !td->o.size &&
 488             !(td->io_ops->flags & FIO_NOIO) && !td->o.fill_device) {
 489                 log_err("%s: you need to specify size=\n", td->o.name);
 490                 td_verror(td, EINVAL, "total_file_size");
 491                 return 1;
 492         }
 493
 494         /*
 495          * now file sizes are known, so we can set ->io_size. if size= is
 496          * not given, ->io_size is just equal to ->real_file_size. if size
 497          * is given, ->io_size is size / nr_files.
 498          */
 499         extend_size = total_size = 0;
 500         need_extend = 0;
 501         for_each_file(td, f, i) {
 502                 f->file_offset = td->o.start_offset;
 503
 504                 if (!td->o.file_size_low) {
 505                         /*
 506                          * no file size range given, file size is equal to
 507                          * total size divided by number of files. if that is
 508                          * zero, set it to the real file size.
 509                          */
 510                         f->io_size = td->o.size / td->o.nr_files;
 511                         if (!f->io_size)
 512                                 f->io_size = f->real_file_size - f->file_offset;
 513                 } else if (f->real_file_size < td->o.file_size_low ||
 514                            f->real_file_size > td->o.file_size_high) {
 515                         if (f->file_offset > td->o.file_size_low)
 516                                 goto err_offset;
 517                         /*
 518                          * file size given. if it's fixed, use that. if it's a
 519                          * range, generate a random size in-between.
 520                          */
 521                         if (td->o.file_size_low == td->o.file_size_high) {
 522                                 f->io_size = td->o.file_size_low
 523                                                 - f->file_offset;
 524                         } else {
 525                                 f->io_size = get_rand_file_size(td)
 526                                                 - f->file_offset;
 527                         }
 528                 } else
 529                         f->io_size = f->real_file_size - f->file_offset;
 530
 531                 if (f->io_size == -1ULL)
 532                         total_size = -1ULL;
 533                 else
 534                         total_size += f->io_size;
 535
 536                 if (f->filetype == FIO_TYPE_FILE &&
 537                     (f->io_size + f->file_offset) > f->real_file_size &&
 538                     !(td->io_ops->flags & FIO_DISKLESSIO)) {
 539                         if (!td->o.create_on_open) {
 540                                 need_extend++;
 541                                 extend_size += (f->io_size + f->file_offset);
 542                         } else
 543                                 f->real_file_size = f->io_size + f->file_offset;
 544                         f->flags |= FIO_FILE_EXTEND;
 545                 }
 546         }
 547
 548         if (!td->o.size || td->o.size > total_size)
 549                 td->o.size = total_size;
 550
 551         /*
 552          * See if we need to extend some files
 553          */
 554         if (need_extend) {
 555                 temp_stall_ts = 1;
 556                 if (!terse_output)
 557                         log_info("%s: Laying out IO file(s) (%u file(s) /"
 558                                  " %LuMiB)\n", td->o.name, need_extend,
 559                                         extend_size >> 20);
 560
 561                 for_each_file(td, f, i) {
 562                         unsigned long long old_len, extend_len;
 563
 564                         if (!(f->flags & FIO_FILE_EXTEND))
 565                                 continue;
 566
 567                         assert(f->filetype == FIO_TYPE_FILE);
 568                         f->flags &= ~FIO_FILE_EXTEND;
 569                         old_len = f->real_file_size;
 570                         extend_len = f->io_size + f->file_offset - old_len;
 571                         f->real_file_size = (f->io_size + f->file_offset);
 572                         err = extend_file(td, f);
 573                         if (err)
 574                                 break;
 575
 576                         err = __file_invalidate_cache(td, f, old_len,
 577                                                                 extend_len);
 578                         close(f->fd);
 579                         f->fd = -1;
 580                         if (err)
 581                                 break;
 582                 }
 583                 temp_stall_ts = 0;
 584         }
 585
 586         if (err)
 587                 return err;
 588
 589         if (!td->o.zone_size)
 590                 td->o.zone_size = td->o.size;
 591
 592         /*
 593          * iolog already set the total io size, if we read back
 594          * stored entries.
 595          */
 596         if (!td->o.read_iolog_file)
 597                 td->total_io_size = td->o.size * td->o.loops;
 598         return 0;
 599 err_offset:
 600         log_err("%s: you need to specify valid offset=\n", td->o.name);
 601         return 1;
 602 }
 603
 604 int init_random_map(struct thread_data *td)
 605 {
 606         unsigned long long blocks, num_maps;
 607         struct fio_file *f;
 608         unsigned int i;
 609
 610         if (td->o.norandommap || !td_random(td))
 611                 return 0;
 612
 613         for_each_file(td, f, i) {
 614                 blocks = (f->real_file_size + td->o.rw_min_bs - 1) /
 615                                 (unsigned long long) td->o.rw_min_bs;
 616                 num_maps = (blocks + BLOCKS_PER_MAP - 1) /
 617                                 (unsigned long long) BLOCKS_PER_MAP;
 618                 f->file_map = smalloc(num_maps * sizeof(int));
 619                 if (f->file_map) {
 620                         f->num_maps = num_maps;
 621                         continue;
 622                 }
 623                 if (!td->o.softrandommap) {
 624                         log_err("fio: failed allocating random map. If running"
 625                                 " a large number of jobs, try the 'norandommap'"
 626                                 " option or set 'softrandommap'. Or give"
 627                                 " a larger --alloc-size to fio.\n");
 628                         return 1;
 629                 }
 630
 631                 log_info("fio: file %s failed allocating random map. Running "
 632                          "job without.\n", f->file_name);
 633                 f->num_maps = 0;
 634         }
 635
 636         return 0;
 637 }
 638
 639 void close_files(struct thread_data *td)
 640 {
 641         struct fio_file *f;
 642         unsigned int i;
 643
 644         for_each_file(td, f, i)
 645                 td_io_close_file(td, f);
 646 }
 647
 648 void close_and_free_files(struct thread_data *td)
 649 {
 650         struct fio_file *f;
 651         unsigned int i;
 652
 653         dprint(FD_FILE, "close files\n");
 654
 655         for_each_file(td, f, i) {
 656                 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
 657                         dprint(FD_FILE, "free unlink %s\n", f->file_name);
 658                         unlink(f->file_name);
 659                 }
 660
 661                 td_io_close_file(td, f);
 662                 remove_file_hash(f);
 663
 664                 sfree(f->file_name);
 665                 f->file_name = NULL;
 666
 667                 if (f->file_map) {
 668                         sfree(f->file_map);
 669                         f->file_map = NULL;
 670                 }
 671                 sfree(f);
 672         }
 673
 674         td->o.filename = NULL;
 675         free(td->files);
 676         td->files_index = 0;
 677         td->files = NULL;
 678         td->o.nr_files = 0;
 679 }
 680
 681 static void get_file_type(struct fio_file *f)
 682 {
 683         struct stat sb;
 684
 685         if (!strcmp(f->file_name, "-"))
 686                 f->filetype = FIO_TYPE_PIPE;
 687         else
 688                 f->filetype = FIO_TYPE_FILE;
 689
 690         if (!lstat(f->file_name, &sb)) {
 691                 if (S_ISBLK(sb.st_mode))
 692                         f->filetype = FIO_TYPE_BD;
 693                 else if (S_ISCHR(sb.st_mode))
 694                         f->filetype = FIO_TYPE_CHAR;
 695                 else if (S_ISFIFO(sb.st_mode))
 696                         f->filetype = FIO_TYPE_PIPE;
 697         }
 698 }
 699
 700 int add_file(struct thread_data *td, const char *fname)
 701 {
 702         int cur_files = td->files_index;
 703         char file_name[PATH_MAX];
 704         struct fio_file *f;
 705         int len = 0;
 706
 707         dprint(FD_FILE, "add file %s\n", fname);
 708
 709         f = smalloc(sizeof(*f));
 710         if (!f) {
 711                 log_err("fio: smalloc OOM\n");
 712                 assert(0);
 713         }
 714
 715         f->fd = -1;
 716
 717         if (td->files_size <= td->files_index) {
 718                 int new_size = td->o.nr_files;
 719
 720                 dprint(FD_FILE, "resize file array to %d files\n", new_size);
 721
 722                 td->files = realloc(td->files, new_size * sizeof(f));
 723                 td->files_size = new_size;
 724         }
 725         td->files[cur_files] = f;
 726
 727         /*
 728          * init function, io engine may not be loaded yet
 729          */
 730         if (td->io_ops && (td->io_ops->flags & FIO_DISKLESSIO))
 731                 f->real_file_size = -1ULL;
 732
 733         if (td->o.directory)
 734                 len = sprintf(file_name, "%s/", td->o.directory);
 735
 736         sprintf(file_name + len, "%s", fname);
 737         f->file_name = smalloc_strdup(file_name);
 738         if (!f->file_name) {
 739                 log_err("fio: smalloc OOM\n");
 740                 assert(0);
 741         }
 742
 743         get_file_type(f);
 744
 745         switch (td->o.file_lock_mode) {
 746         case FILE_LOCK_NONE:
 747                 break;
 748         case FILE_LOCK_READWRITE:
 749                 f->lock = fio_mutex_rw_init();
 750                 break;
 751         case FILE_LOCK_EXCLUSIVE:
 752                 f->lock = fio_mutex_init(1);
 753                 break;
 754         default:
 755                 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
 756                 assert(0);
 757         }
 758
 759         td->files_index++;
 760         if (f->filetype == FIO_TYPE_FILE)
 761                 td->nr_normal_files++;
 762
 763         dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name,
 764                                                         cur_files);
 765
 766         return cur_files;
 767 }
 768
 769 void get_file(struct fio_file *f)
 770 {
 771         dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
 772         assert(f->flags & FIO_FILE_OPEN);
 773         f->references++;
 774 }
 775
 776 int put_file(struct thread_data *td, struct fio_file *f)
 777 {
 778         int f_ret = 0, ret = 0;
 779
 780         dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
 781
 782         if (!(f->flags & FIO_FILE_OPEN))
 783                 return 0;
 784
 785         assert(f->references);
 786         if (--f->references)
 787                 return 0;
 788
 789         if (should_fsync(td) && td->o.fsync_on_close)
 790                 f_ret = fsync(f->fd);
 791
 792         if (td->io_ops->close_file)
 793                 ret = td->io_ops->close_file(td, f);
 794
 795         if (!ret)
 796                 ret = f_ret;
 797
 798         td->nr_open_files--;
 799         f->flags &= ~FIO_FILE_OPEN;
 800         return ret;
 801 }
 802
 803 void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
 804 {
 805         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
 806                 return;
 807
 808         if (f->lock_owner == td && f->lock_batch--)
 809                 return;
 810
 811         if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
 812                 if (ddir == DDIR_READ)
 813                         fio_mutex_down_read(f->lock);
 814                 else
 815                         fio_mutex_down_write(f->lock);
 816         } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
 817                 fio_mutex_down(f->lock);
 818
 819         f->lock_owner = td;
 820         f->lock_batch = td->o.lockfile_batch;
 821         f->lock_ddir = ddir;
 822 }
 823
 824 void unlock_file(struct thread_data *td, struct fio_file *f)
 825 {
 826         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
 827                 return;
 828         if (f->lock_batch)
 829                 return;
 830
 831         if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
 832                 const int is_read = f->lock_ddir == DDIR_READ;
 833                 int val = fio_mutex_getval(f->lock);
 834
 835                 if ((is_read && val == 1) || (!is_read && val == -1))
 836                         f->lock_owner = NULL;
 837
 838                 if (is_read)
 839                         fio_mutex_up_read(f->lock);
 840                 else
 841                         fio_mutex_up_write(f->lock);
 842         } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE) {
 843                 int val = fio_mutex_getval(f->lock);
 844
 845                 if (val == 0)
 846                         f->lock_owner = NULL;
 847
 848                 fio_mutex_up(f->lock);
 849         }
 850 }
 851
 852 void unlock_file_all(struct thread_data *td, struct fio_file *f)
 853 {
 854         if (f->lock_owner != td)
 855                 return;
 856
 857         f->lock_batch = 0;
 858         unlock_file(td, f);
 859 }
 860
 861 static int recurse_dir(struct thread_data *td, const char *dirname)
 862 {
 863         struct dirent *dir;
 864         int ret = 0;
 865         DIR *D;
 866
 867         D = opendir(dirname);
 868         if (!D) {
 869                 char buf[FIO_VERROR_SIZE];
 870
 871                 snprintf(buf, FIO_VERROR_SIZE - 1, "opendir(%s)", dirname);
 872                 td_verror(td, errno, buf);
 873                 return 1;
 874         }
 875
 876         while ((dir = readdir(D)) != NULL) {
 877                 char full_path[PATH_MAX];
 878                 struct stat sb;
 879
 880                 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
 881                         continue;
 882
 883                 sprintf(full_path, "%s/%s", dirname, dir->d_name);
 884
 885                 if (lstat(full_path, &sb) == -1) {
 886                         if (errno != ENOENT) {
 887                                 td_verror(td, errno, "stat");
 888                                 return 1;
 889                         }
 890                 }
 891
 892                 if (S_ISREG(sb.st_mode)) {
 893                         add_file(td, full_path);
 894                         td->o.nr_files++;
 895                         continue;
 896                 }
 897                 if (!S_ISDIR(sb.st_mode))
 898                         continue;
 899
 900                 ret = recurse_dir(td, full_path);
 901                 if (ret)
 902                         break;
 903         }
 904
 905         closedir(D);
 906         return ret;
 907 }
 908
 909 int add_dir_files(struct thread_data *td, const char *path)
 910 {
 911         int ret = recurse_dir(td, path);
 912
 913         if (!ret)
 914                 log_info("fio: opendir added %d files\n", td->o.nr_files);
 915
 916         return ret;
 917 }
 918
 919 void dup_files(struct thread_data *td, struct thread_data *org)
 920 {
 921         struct fio_file *f;
 922         unsigned int i;
 923
 924         dprint(FD_FILE, "dup files: %d\n", org->files_index);
 925
 926         if (!org->files)
 927                 return;
 928
 929         td->files = malloc(org->files_index * sizeof(f));
 930
 931         for_each_file(org, f, i) {
 932                 struct fio_file *__f;
 933
 934                 __f = smalloc(sizeof(*__f));
 935                 if (!__f) {
 936                         log_err("fio: smalloc OOM\n");
 937                         assert(0);
 938                 }
 939
 940                 if (f->file_name) {
 941                         __f->file_name = smalloc_strdup(f->file_name);
 942                         if (!__f->file_name) {
 943                                 log_err("fio: smalloc OOM\n");
 944                                 assert(0);
 945                         }
 946
 947                         __f->filetype = f->filetype;
 948                 }
 949
 950                 td->files[i] = __f;
 951         }
 952 }
 953
 954 /*
 955  * Returns the index that matches the filename, or -1 if not there
 956  */
 957 int get_fileno(struct thread_data *td, const char *fname)
 958 {
 959         struct fio_file *f;
 960         unsigned int i;
 961
 962         for_each_file(td, f, i)
 963                 if (!strcmp(f->file_name, fname))
 964                         return i;
 965
 966         return -1;
 967 }
 968
 969 /*
 970  * For log usage, where we add/open/close files automatically
 971  */
 972 void free_release_files(struct thread_data *td)
 973 {
 974         close_files(td);
 975         td->files_index = 0;
 976         td->nr_normal_files = 0;
 977 }