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