filesetup.c

   1 #include <unistd.h>
   2 #include <fcntl.h>
   3 #include <string.h>
   4 #include <assert.h>
   5 #include <dirent.h>
   6 #include <sys/stat.h>
   7 #include <sys/mman.h>
   8 #include <sys/types.h>
   9
  10 #include "fio.h"
  11 #include "smalloc.h"
  12 #include "filehash.h"
  13
  14 static int root_warn;
  15
  16 static inline void clear_error(struct thread_data *td)
  17 {
  18         td->error = 0;
  19         td->verror[0] = '\0';
  20 }
  21
  22 /*
  23  * Leaves f->fd open on success, caller must close
  24  */
  25 static int extend_file(struct thread_data *td, struct fio_file *f)
  26 {
  27         int r, new_layout = 0, unlink_file = 0, flags;
  28         unsigned long long left;
  29         unsigned int bs;
  30         char *b;
  31
  32         if (read_only) {
  33                 log_err("fio: refusing extend of file due to read-only\n");
  34                 return 0;
  35         }
  36
  37         /*
  38          * check if we need to lay the file out complete again. fio
  39          * does that for operations involving reads, or for writes
  40          * where overwrite is set
  41          */
  42         if (td_read(td) || (td_write(td) && td->o.overwrite) ||
  43             (td_write(td) && td->io_ops->flags & FIO_NOEXTEND))
  44                 new_layout = 1;
  45         if (td_write(td) && !td->o.overwrite)
  46                 unlink_file = 1;
  47
  48         if (unlink_file || new_layout) {
  49                 dprint(FD_FILE, "layout unlink %s\n", f->file_name);
  50                 if ((unlink(f->file_name) < 0) && (errno != ENOENT)) {
  51                         td_verror(td, errno, "unlink");
  52                         return 1;
  53                 }
  54         }
  55
  56         flags = O_WRONLY | O_CREAT;
  57         if (new_layout)
  58                 flags |= O_TRUNC;
  59
  60         dprint(FD_FILE, "open file %s, flags %x\n", f->file_name, flags);
  61         f->fd = open(f->file_name, flags, 0644);
  62         if (f->fd < 0) {
  63                 td_verror(td, errno, "open");
  64                 return 1;
  65         }
  66
  67         if (!new_layout)
  68                 goto done;
  69
  70         /*
  71          * The size will be -1ULL when fill_device is used, so don't truncate
  72          * or fallocate this file, just write it
  73          */
  74         if (!td->o.fill_device) {
  75                 dprint(FD_FILE, "truncate file %s, size %llu\n", f->file_name,
  76                                                         f->real_file_size);
  77                 if (ftruncate(f->fd, f->real_file_size) == -1) {
  78                         td_verror(td, errno, "ftruncate");
  79                         goto err;
  80                 }
  81
  82 #ifdef FIO_HAVE_FALLOCATE
  83                 dprint(FD_FILE, "fallocate file %s, size %llu\n", f->file_name,
  84                                                         f->real_file_size);
  85                 r = posix_fallocate(f->fd, 0, f->real_file_size);
  86                 if (r < 0) {
  87                         log_err("fio: posix_fallocate fails: %s\n",
  88                                         strerror(-r));
  89                 }
  90 #endif
  91         }
  92
  93         b = malloc(td->o.max_bs[DDIR_WRITE]);
  94         memset(b, 0, td->o.max_bs[DDIR_WRITE]);
  95
  96         left = f->real_file_size;
  97         while (left && !td->terminate) {
  98                 bs = td->o.max_bs[DDIR_WRITE];
  99                 if (bs > left)
 100                         bs = left;
 101
 102                 r = write(f->fd, b, bs);
 103
 104                 if (r > 0) {
 105                         left -= r;
 106                         continue;
 107                 } else {
 108                         if (r < 0) {
 109                                 int __e = errno;
 110
 111                                 if (__e == ENOSPC) {
 112                                         if (td->o.fill_device)
 113                                                 break;
 114                                         log_info("fio: ENOSPC on laying out "
 115                                                  "file, stopping\n");
 116                                         break;
 117                                 }
 118                                 td_verror(td, errno, "write");
 119                         } else
 120                                 td_verror(td, EIO, "write");
 121
 122                         break;
 123                 }
 124         }
 125
 126         if (td->terminate) {
 127                 dprint(FD_FILE, "terminate unlink %s\n", f->file_name);
 128                 unlink(f->file_name);
 129         } else if (td->o.create_fsync) {
 130                 if (fsync(f->fd) < 0) {
 131                         td_verror(td, errno, "fsync");
 132                         goto err;
 133                 }
 134         }
 135         if (td->o.fill_device) {
 136                 fio_file_clear_size_known(f);
 137                 if (td_io_get_file_size(td, f))
 138                         goto err;
 139                 if (f->io_size > f->real_file_size)
 140                         f->io_size = f->real_file_size;
 141         }
 142
 143         free(b);
 144 done:
 145         return 0;
 146 err:
 147         close(f->fd);
 148         f->fd = -1;
 149         return 1;
 150 }
 151
 152 static int pre_read_file(struct thread_data *td, struct fio_file *f)
 153 {
 154         int r, did_open = 0, old_runstate;
 155         unsigned long long left;
 156         unsigned int bs;
 157         char *b;
 158
 159         if (!fio_file_open(f)) {
 160                 if (td->io_ops->open_file(td, f)) {
 161                         log_err("fio: cannot pre-read, failed to open file\n");
 162                         return 1;
 163                 }
 164                 did_open = 1;
 165         }
 166
 167         old_runstate = td->runstate;
 168         td_set_runstate(td, TD_PRE_READING);
 169
 170         bs = td->o.max_bs[DDIR_READ];
 171         b = malloc(bs);
 172         memset(b, 0, bs);
 173
 174         lseek(f->fd, f->file_offset, SEEK_SET);
 175         left = f->io_size;
 176
 177         while (left && !td->terminate) {
 178                 if (bs > left)
 179                         bs = left;
 180
 181                 r = read(f->fd, b, bs);
 182
 183                 if (r == (int) bs) {
 184                         left -= bs;
 185                         continue;
 186                 } else {
 187                         td_verror(td, EIO, "pre_read");
 188                         break;
 189                 }
 190         }
 191
 192         td_set_runstate(td, old_runstate);
 193
 194         if (did_open)
 195                 td->io_ops->close_file(td, f);
 196         free(b);
 197         return 0;
 198 }
 199
 200 static unsigned long long get_rand_file_size(struct thread_data *td)
 201 {
 202         unsigned long long ret, sized;
 203         long r;
 204
 205         r = os_random_long(&td->file_size_state);
 206         sized = td->o.file_size_high - td->o.file_size_low;
 207         ret = (unsigned long long) ((double) sized * (r / (OS_RAND_MAX + 1.0)));
 208         ret += td->o.file_size_low;
 209         ret -= (ret % td->o.rw_min_bs);
 210         return ret;
 211 }
 212
 213 static int file_size(struct thread_data *td, struct fio_file *f)
 214 {
 215         struct stat st;
 216
 217         if (stat(f->file_name, &st) == -1) {
 218                 td_verror(td, errno, "fstat");
 219                 return 1;
 220         }
 221
 222         f->real_file_size = st.st_size;
 223         return 0;
 224 }
 225
 226 static int bdev_size(struct thread_data *td, struct fio_file *f)
 227 {
 228         unsigned long long bytes;
 229         int r;
 230
 231         if (td->io_ops->open_file(td, f)) {
 232                 log_err("fio: failed opening blockdev %s for size check\n",
 233                         f->file_name);
 234                 return 1;
 235         }
 236
 237         r = blockdev_size(f->fd, &bytes);
 238         if (r) {
 239                 td_verror(td, r, "blockdev_size");
 240                 goto err;
 241         }
 242
 243         if (!bytes) {
 244                 log_err("%s: zero sized block device?\n", f->file_name);
 245                 goto err;
 246         }
 247
 248         f->real_file_size = bytes;
 249         return 0;
 250 err:
 251         td->io_ops->close_file(td, f);
 252         return 1;
 253 }
 254
 255 static int get_file_size(struct thread_data *td, struct fio_file *f)
 256 {
 257         int ret = 0;
 258
 259         if (fio_file_size_known(f))
 260                 return 0;
 261
 262         if (f->filetype == FIO_TYPE_FILE)
 263                 ret = file_size(td, f);
 264         else if (f->filetype == FIO_TYPE_BD)
 265                 ret = bdev_size(td, f);
 266         else
 267                 f->real_file_size = -1;
 268
 269         if (ret)
 270                 return ret;
 271
 272         if (f->file_offset > f->real_file_size) {
 273                 log_err("%s: offset extends end (%Lu > %Lu)\n", td->o.name,
 274                                         f->file_offset, f->real_file_size);
 275                 return 1;
 276         }
 277
 278         fio_file_set_size_known(f);
 279         return 0;
 280 }
 281
 282 static int __file_invalidate_cache(struct thread_data *td, struct fio_file *f,
 283                                    unsigned long long off,
 284                                    unsigned long long len)
 285 {
 286         int ret = 0;
 287
 288         if (len == -1ULL)
 289                 len = f->io_size;
 290         if (off == -1ULL)
 291                 off = f->file_offset;
 292
 293         dprint(FD_IO, "invalidate cache %s: %llu/%llu\n", f->file_name, off,
 294                                                                 len);
 295
 296         /*
 297          * FIXME: add blockdev flushing too
 298          */
 299         if (f->mmap_ptr)
 300                 ret = madvise(f->mmap_ptr, f->mmap_sz, MADV_DONTNEED);
 301         else if (f->filetype == FIO_TYPE_FILE) {
 302                 ret = fadvise(f->fd, off, len, POSIX_FADV_DONTNEED);
 303         } else if (f->filetype == FIO_TYPE_BD) {
 304                 ret = blockdev_invalidate_cache(f->fd);
 305                 if (ret < 0 && errno == EACCES && geteuid()) {
 306                         if (!root_warn) {
 307                                 log_err("fio: only root may flush block "
 308                                         "devices. Cache flush bypassed!\n");
 309                                 root_warn = 1;
 310                         }
 311                         ret = 0;
 312                 }
 313         } else if (f->filetype == FIO_TYPE_CHAR || f->filetype == FIO_TYPE_PIPE)
 314                 ret = 0;
 315
 316         if (ret < 0) {
 317                 td_verror(td, errno, "invalidate_cache");
 318                 return 1;
 319         } else if (ret > 0) {
 320                 td_verror(td, ret, "invalidate_cache");
 321                 return 1;
 322         }
 323
 324         return ret;
 325
 326 }
 327
 328 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
 329 {
 330         if (!fio_file_open(f))
 331                 return 0;
 332
 333         return __file_invalidate_cache(td, f, -1ULL, -1ULL);
 334 }
 335
 336 int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
 337 {
 338         int ret = 0;
 339
 340         dprint(FD_FILE, "fd close %s\n", f->file_name);
 341
 342         remove_file_hash(f);
 343
 344         if (close(f->fd) < 0)
 345                 ret = errno;
 346
 347         f->fd = -1;
 348         return ret;
 349 }
 350
 351 static int file_lookup_open(struct fio_file *f, int flags)
 352 {
 353         struct fio_file *__f;
 354         int from_hash;
 355
 356         __f = lookup_file_hash(f->file_name);
 357         if (__f) {
 358                 dprint(FD_FILE, "found file in hash %s\n", f->file_name);
 359                 /*
 360                  * racy, need the __f->lock locked
 361                  */
 362                 f->lock = __f->lock;
 363                 f->lock_owner = __f->lock_owner;
 364                 f->lock_batch = __f->lock_batch;
 365                 f->lock_ddir = __f->lock_ddir;
 366                 from_hash = 1;
 367         } else {
 368                 dprint(FD_FILE, "file not found in hash %s\n", f->file_name);
 369                 from_hash = 0;
 370         }
 371
 372         f->fd = open(f->file_name, flags, 0600);
 373         return from_hash;
 374 }
 375
 376 int generic_open_file(struct thread_data *td, struct fio_file *f)
 377 {
 378         int is_std = 0;
 379         int flags = 0;
 380         int from_hash = 0;
 381
 382         dprint(FD_FILE, "fd open %s\n", f->file_name);
 383
 384         if (!strcmp(f->file_name, "-")) {
 385                 if (td_rw(td)) {
 386                         log_err("fio: can't read/write to stdin/out\n");
 387                         return 1;
 388                 }
 389                 is_std = 1;
 390
 391                 /*
 392                  * move output logging to stderr, if we are writing to stdout
 393                  */
 394                 if (td_write(td))
 395                         f_out = stderr;
 396         }
 397
 398         if (td->o.odirect)
 399                 flags |= OS_O_DIRECT;
 400         if (td->o.sync_io)
 401                 flags |= O_SYNC;
 402         if (f->filetype != FIO_TYPE_FILE)
 403                 flags |= FIO_O_NOATIME;
 404         if (td->o.create_on_open)
 405                 flags |= O_CREAT;
 406
 407 open_again:
 408         if (td_write(td)) {
 409                 if (!read_only)
 410                         flags |= O_RDWR;
 411
 412                 if (f->filetype == FIO_TYPE_FILE)
 413                         flags |= O_CREAT;
 414
 415                 if (is_std)
 416                         f->fd = dup(STDOUT_FILENO);
 417                 else
 418                         from_hash = file_lookup_open(f, flags);
 419         } else {
 420                 if (f->filetype == FIO_TYPE_CHAR && !read_only)
 421                         flags |= O_RDWR;
 422                 else
 423                         flags |= O_RDONLY;
 424
 425                 if (is_std)
 426                         f->fd = dup(STDIN_FILENO);
 427                 else
 428                         from_hash = file_lookup_open(f, flags);
 429         }
 430
 431         if (f->fd == -1) {
 432                 char buf[FIO_VERROR_SIZE];
 433                 int __e = errno;
 434
 435                 if (errno == EPERM && (flags & FIO_O_NOATIME)) {
 436                         flags &= ~FIO_O_NOATIME;
 437                         goto open_again;
 438                 }
 439
 440                 snprintf(buf, sizeof(buf) - 1, "open(%s)", f->file_name);
 441
 442                 td_verror(td, __e, buf);
 443         }
 444
 445         if (!from_hash && f->fd != -1) {
 446                 if (add_file_hash(f)) {
 447                         int ret;
 448
 449                         /*
 450                          * OK to ignore, we haven't done anything with it
 451                          */
 452                         ret = generic_close_file(td, f);
 453                         goto open_again;
 454                 }
 455         }
 456
 457         return 0;
 458 }
 459
 460 int generic_get_file_size(struct thread_data *td, struct fio_file *f)
 461 {
 462         return get_file_size(td, f);
 463 }
 464
 465 /*
 466  * open/close all files, so that ->real_file_size gets set
 467  */
 468 static int get_file_sizes(struct thread_data *td)
 469 {
 470         struct fio_file *f;
 471         unsigned int i;
 472         int err = 0;
 473
 474         for_each_file(td, f, i) {
 475                 dprint(FD_FILE, "get file size for %p/%d/%p\n", f, i,
 476                                                                 f->file_name);
 477
 478                 if (td_io_get_file_size(td, f)) {
 479                         if (td->error != ENOENT) {
 480                                 log_err("%s\n", td->verror);
 481                                 err = 1;
 482                         }
 483                         clear_error(td);
 484                 }
 485
 486                 if (f->real_file_size == -1ULL && td->o.size)
 487                         f->real_file_size = td->o.size / td->o.nr_files;
 488         }
 489
 490         return err;
 491 }
 492
 493 /*
 494  * Open the files and setup files sizes, creating files if necessary.
 495  */
 496 int setup_files(struct thread_data *td)
 497 {
 498         unsigned long long total_size, extend_size;
 499         struct fio_file *f;
 500         unsigned int i;
 501         int err = 0, need_extend;
 502
 503         dprint(FD_FILE, "setup files\n");
 504
 505         if (td->o.read_iolog_file)
 506                 return 0;
 507
 508         /*
 509          * if ioengine defines a setup() method, it's responsible for
 510          * opening the files and setting f->real_file_size to indicate
 511          * the valid range for that file.
 512          */
 513         if (td->io_ops->setup)
 514                 err = td->io_ops->setup(td);
 515         else
 516                 err = get_file_sizes(td);
 517
 518         if (err)
 519                 return err;
 520
 521         /*
 522          * check sizes. if the files/devices do not exist and the size
 523          * isn't passed to fio, abort.
 524          */
 525         total_size = 0;
 526         for_each_file(td, f, i) {
 527                 if (f->real_file_size == -1ULL)
 528                         total_size = -1ULL;
 529                 else
 530                         total_size += f->real_file_size;
 531         }
 532
 533         /*
 534          * device/file sizes are zero and no size given, punt
 535          */
 536         if ((!total_size || total_size == -1ULL) && !td->o.size &&
 537             !(td->io_ops->flags & FIO_NOIO) && !td->o.fill_device) {
 538                 log_err("%s: you need to specify size=\n", td->o.name);
 539                 td_verror(td, EINVAL, "total_file_size");
 540                 return 1;
 541         }
 542
 543         /*
 544          * now file sizes are known, so we can set ->io_size. if size= is
 545          * not given, ->io_size is just equal to ->real_file_size. if size
 546          * is given, ->io_size is size / nr_files.
 547          */
 548         extend_size = total_size = 0;
 549         need_extend = 0;
 550         for_each_file(td, f, i) {
 551                 f->file_offset = td->o.start_offset;
 552
 553                 if (!td->o.file_size_low) {
 554                         /*
 555                          * no file size range given, file size is equal to
 556                          * total size divided by number of files. if that is
 557                          * zero, set it to the real file size.
 558                          */
 559                         f->io_size = td->o.size / td->o.nr_files;
 560                         if (!f->io_size)
 561                                 f->io_size = f->real_file_size - f->file_offset;
 562                 } else if (f->real_file_size < td->o.file_size_low ||
 563                            f->real_file_size > td->o.file_size_high) {
 564                         if (f->file_offset > td->o.file_size_low)
 565                                 goto err_offset;
 566                         /*
 567                          * file size given. if it's fixed, use that. if it's a
 568                          * range, generate a random size in-between.
 569                          */
 570                         if (td->o.file_size_low == td->o.file_size_high) {
 571                                 f->io_size = td->o.file_size_low
 572                                                 - f->file_offset;
 573                         } else {
 574                                 f->io_size = get_rand_file_size(td)
 575                                                 - f->file_offset;
 576                         }
 577                 } else
 578                         f->io_size = f->real_file_size - f->file_offset;
 579
 580                 if (f->io_size == -1ULL)
 581                         total_size = -1ULL;
 582                 else
 583                         total_size += f->io_size;
 584
 585                 if (f->filetype == FIO_TYPE_FILE &&
 586                     (f->io_size + f->file_offset) > f->real_file_size &&
 587                     !(td->io_ops->flags & FIO_DISKLESSIO)) {
 588                         if (!td->o.create_on_open) {
 589                                 need_extend++;
 590                                 extend_size += (f->io_size + f->file_offset);
 591                         } else
 592                                 f->real_file_size = f->io_size + f->file_offset;
 593                         fio_file_set_extend(f);
 594                 }
 595         }
 596
 597         if (!td->o.size || td->o.size > total_size)
 598                 td->o.size = total_size;
 599
 600         /*
 601          * See if we need to extend some files
 602          */
 603         if (need_extend) {
 604                 temp_stall_ts = 1;
 605                 if (!terse_output)
 606                         log_info("%s: Laying out IO file(s) (%u file(s) /"
 607                                  " %LuMiB)\n", td->o.name, need_extend,
 608                                         extend_size >> 20);
 609
 610                 for_each_file(td, f, i) {
 611                         unsigned long long old_len = -1ULL, extend_len = -1ULL;
 612
 613                         if (!fio_file_extend(f))
 614                                 continue;
 615
 616                         assert(f->filetype == FIO_TYPE_FILE);
 617                         fio_file_clear_extend(f);
 618                         if (!td->o.fill_device) {
 619                                 old_len = f->real_file_size;
 620                                 extend_len = f->io_size + f->file_offset - old_len;
 621                         }
 622                         f->real_file_size = (f->io_size + f->file_offset);
 623                         err = extend_file(td, f);
 624                         if (err)
 625                                 break;
 626
 627                         err = __file_invalidate_cache(td, f, old_len,
 628                                                                 extend_len);
 629                         close(f->fd);
 630                         f->fd = -1;
 631                         if (err)
 632                                 break;
 633                 }
 634                 temp_stall_ts = 0;
 635         }
 636
 637         if (err)
 638                 return err;
 639
 640         if (!td->o.zone_size)
 641                 td->o.zone_size = td->o.size;
 642
 643         /*
 644          * iolog already set the total io size, if we read back
 645          * stored entries.
 646          */
 647         if (!td->o.read_iolog_file)
 648                 td->total_io_size = td->o.size * td->o.loops;
 649         return 0;
 650 err_offset:
 651         log_err("%s: you need to specify valid offset=\n", td->o.name);
 652         return 1;
 653 }
 654
 655 int pre_read_files(struct thread_data *td)
 656 {
 657         struct fio_file *f;
 658         unsigned int i;
 659
 660         dprint(FD_FILE, "pre_read files\n");
 661
 662         for_each_file(td, f, i) {
 663                 pre_read_file(td, f);
 664         }
 665
 666         return 1;
 667 }
 668
 669 int init_random_map(struct thread_data *td)
 670 {
 671         unsigned long long blocks, num_maps;
 672         struct fio_file *f;
 673         unsigned int i;
 674
 675         if (td->o.norandommap || !td_random(td))
 676                 return 0;
 677
 678         for_each_file(td, f, i) {
 679                 blocks = (f->real_file_size + td->o.rw_min_bs - 1) /
 680                                 (unsigned long long) td->o.rw_min_bs;
 681                 num_maps = (blocks + BLOCKS_PER_MAP - 1) /
 682                                 (unsigned long long) BLOCKS_PER_MAP;
 683                 f->file_map = smalloc(num_maps * sizeof(int));
 684                 if (f->file_map) {
 685                         f->num_maps = num_maps;
 686                         continue;
 687                 }
 688                 if (!td->o.softrandommap) {
 689                         log_err("fio: failed allocating random map. If running"
 690                                 " a large number of jobs, try the 'norandommap'"
 691                                 " option or set 'softrandommap'. Or give"
 692                                 " a larger --alloc-size to fio.\n");
 693                         return 1;
 694                 }
 695
 696                 log_info("fio: file %s failed allocating random map. Running "
 697                          "job without.\n", f->file_name);
 698                 f->num_maps = 0;
 699         }
 700
 701         return 0;
 702 }
 703
 704 void close_files(struct thread_data *td)
 705 {
 706         struct fio_file *f;
 707         unsigned int i;
 708
 709         for_each_file(td, f, i)
 710                 td_io_close_file(td, f);
 711 }
 712
 713 void close_and_free_files(struct thread_data *td)
 714 {
 715         struct fio_file *f;
 716         unsigned int i;
 717
 718         dprint(FD_FILE, "close files\n");
 719
 720         for_each_file(td, f, i) {
 721                 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
 722                         dprint(FD_FILE, "free unlink %s\n", f->file_name);
 723                         unlink(f->file_name);
 724                 }
 725
 726                 td_io_close_file(td, f);
 727                 remove_file_hash(f);
 728
 729                 sfree(f->file_name);
 730                 f->file_name = NULL;
 731
 732                 if (f->file_map) {
 733                         sfree(f->file_map);
 734                         f->file_map = NULL;
 735                 }
 736                 sfree(f);
 737         }
 738
 739         td->o.filename = NULL;
 740         free(td->files);
 741         td->files_index = 0;
 742         td->files = NULL;
 743         td->o.nr_files = 0;
 744 }
 745
 746 static void get_file_type(struct fio_file *f)
 747 {
 748         struct stat sb;
 749
 750         if (!strcmp(f->file_name, "-"))
 751                 f->filetype = FIO_TYPE_PIPE;
 752         else
 753                 f->filetype = FIO_TYPE_FILE;
 754
 755         if (!lstat(f->file_name, &sb)) {
 756                 if (S_ISBLK(sb.st_mode))
 757                         f->filetype = FIO_TYPE_BD;
 758                 else if (S_ISCHR(sb.st_mode))
 759                         f->filetype = FIO_TYPE_CHAR;
 760                 else if (S_ISFIFO(sb.st_mode))
 761                         f->filetype = FIO_TYPE_PIPE;
 762         }
 763 }
 764
 765 int add_file(struct thread_data *td, const char *fname)
 766 {
 767         int cur_files = td->files_index;
 768         char file_name[PATH_MAX];
 769         struct fio_file *f;
 770         int len = 0;
 771
 772         dprint(FD_FILE, "add file %s\n", fname);
 773
 774         f = smalloc(sizeof(*f));
 775         if (!f) {
 776                 log_err("fio: smalloc OOM\n");
 777                 assert(0);
 778         }
 779
 780         f->fd = -1;
 781
 782         if (td->files_size <= td->files_index) {
 783                 int new_size = td->o.nr_files + 1;
 784
 785                 dprint(FD_FILE, "resize file array to %d files\n", new_size);
 786
 787                 td->files = realloc(td->files, new_size * sizeof(f));
 788                 td->files_size = new_size;
 789         }
 790         td->files[cur_files] = f;
 791
 792         /*
 793          * init function, io engine may not be loaded yet
 794          */
 795         if (td->io_ops && (td->io_ops->flags & FIO_DISKLESSIO))
 796                 f->real_file_size = -1ULL;
 797
 798         if (td->o.directory)
 799                 len = sprintf(file_name, "%s/", td->o.directory);
 800
 801         sprintf(file_name + len, "%s", fname);
 802         f->file_name = smalloc_strdup(file_name);
 803         if (!f->file_name) {
 804                 log_err("fio: smalloc OOM\n");
 805                 assert(0);
 806         }
 807
 808         get_file_type(f);
 809
 810         switch (td->o.file_lock_mode) {
 811         case FILE_LOCK_NONE:
 812                 break;
 813         case FILE_LOCK_READWRITE:
 814                 f->lock = fio_mutex_rw_init();
 815                 break;
 816         case FILE_LOCK_EXCLUSIVE:
 817                 f->lock = fio_mutex_init(1);
 818                 break;
 819         default:
 820                 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
 821                 assert(0);
 822         }
 823
 824         td->files_index++;
 825         if (f->filetype == FIO_TYPE_FILE)
 826                 td->nr_normal_files++;
 827
 828         dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name,
 829                                                         cur_files);
 830
 831         return cur_files;
 832 }
 833
 834 void get_file(struct fio_file *f)
 835 {
 836         dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
 837         assert(fio_file_open(f));
 838         f->references++;
 839 }
 840
 841 int put_file(struct thread_data *td, struct fio_file *f)
 842 {
 843         int f_ret = 0, ret = 0;
 844
 845         dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
 846
 847         if (!fio_file_open(f))
 848                 return 0;
 849
 850         assert(f->references);
 851         if (--f->references)
 852                 return 0;
 853
 854         if (should_fsync(td) && td->o.fsync_on_close)
 855                 f_ret = fsync(f->fd);
 856
 857         if (td->io_ops->close_file)
 858                 ret = td->io_ops->close_file(td, f);
 859
 860         if (!ret)
 861                 ret = f_ret;
 862
 863         td->nr_open_files--;
 864         fio_file_clear_open(f);
 865         return ret;
 866 }
 867
 868 void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
 869 {
 870         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
 871                 return;
 872
 873         if (f->lock_owner == td && f->lock_batch--)
 874                 return;
 875
 876         if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
 877                 if (ddir == DDIR_READ)
 878                         fio_mutex_down_read(f->lock);
 879                 else
 880                         fio_mutex_down_write(f->lock);
 881         } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
 882                 fio_mutex_down(f->lock);
 883
 884         f->lock_owner = td;
 885         f->lock_batch = td->o.lockfile_batch;
 886         f->lock_ddir = ddir;
 887 }
 888
 889 void unlock_file(struct thread_data *td, struct fio_file *f)
 890 {
 891         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
 892                 return;
 893         if (f->lock_batch)
 894                 return;
 895
 896         if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
 897                 const int is_read = f->lock_ddir == DDIR_READ;
 898                 int val = fio_mutex_getval(f->lock);
 899
 900                 if ((is_read && val == 1) || (!is_read && val == -1))
 901                         f->lock_owner = NULL;
 902
 903                 if (is_read)
 904                         fio_mutex_up_read(f->lock);
 905                 else
 906                         fio_mutex_up_write(f->lock);
 907         } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE) {
 908                 int val = fio_mutex_getval(f->lock);
 909
 910                 if (val == 0)
 911                         f->lock_owner = NULL;
 912
 913                 fio_mutex_up(f->lock);
 914         }
 915 }
 916
 917 void unlock_file_all(struct thread_data *td, struct fio_file *f)
 918 {
 919         if (f->lock_owner != td)
 920                 return;
 921
 922         f->lock_batch = 0;
 923         unlock_file(td, f);
 924 }
 925
 926 static int recurse_dir(struct thread_data *td, const char *dirname)
 927 {
 928         struct dirent *dir;
 929         int ret = 0;
 930         DIR *D;
 931
 932         D = opendir(dirname);
 933         if (!D) {
 934                 char buf[FIO_VERROR_SIZE];
 935
 936                 snprintf(buf, FIO_VERROR_SIZE - 1, "opendir(%s)", dirname);
 937                 td_verror(td, errno, buf);
 938                 return 1;
 939         }
 940
 941         while ((dir = readdir(D)) != NULL) {
 942                 char full_path[PATH_MAX];
 943                 struct stat sb;
 944
 945                 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
 946                         continue;
 947
 948                 sprintf(full_path, "%s/%s", dirname, dir->d_name);
 949
 950                 if (lstat(full_path, &sb) == -1) {
 951                         if (errno != ENOENT) {
 952                                 td_verror(td, errno, "stat");
 953                                 return 1;
 954                         }
 955                 }
 956
 957                 if (S_ISREG(sb.st_mode)) {
 958                         add_file(td, full_path);
 959                         td->o.nr_files++;
 960                         continue;
 961                 }
 962                 if (!S_ISDIR(sb.st_mode))
 963                         continue;
 964
 965                 ret = recurse_dir(td, full_path);
 966                 if (ret)
 967                         break;
 968         }
 969
 970         closedir(D);
 971         return ret;
 972 }
 973
 974 int add_dir_files(struct thread_data *td, const char *path)
 975 {
 976         int ret = recurse_dir(td, path);
 977
 978         if (!ret)
 979                 log_info("fio: opendir added %d files\n", td->o.nr_files);
 980
 981         return ret;
 982 }
 983
 984 void dup_files(struct thread_data *td, struct thread_data *org)
 985 {
 986         struct fio_file *f;
 987         unsigned int i;
 988
 989         dprint(FD_FILE, "dup files: %d\n", org->files_index);
 990
 991         if (!org->files)
 992                 return;
 993
 994         td->files = malloc(org->files_index * sizeof(f));
 995
 996         for_each_file(org, f, i) {
 997                 struct fio_file *__f;
 998
 999                 __f = smalloc(sizeof(*__f));
1000                 if (!__f) {
1001                         log_err("fio: smalloc OOM\n");
1002                         assert(0);
1003                 }
1004
1005                 if (f->file_name) {
1006                         __f->file_name = smalloc_strdup(f->file_name);
1007                         if (!__f->file_name) {
1008                                 log_err("fio: smalloc OOM\n");
1009                                 assert(0);
1010                         }
1011
1012                         __f->filetype = f->filetype;
1013                 }
1014
1015                 td->files[i] = __f;
1016         }
1017 }
1018
1019 /*
1020  * Returns the index that matches the filename, or -1 if not there
1021  */
1022 int get_fileno(struct thread_data *td, const char *fname)
1023 {
1024         struct fio_file *f;
1025         unsigned int i;
1026
1027         for_each_file(td, f, i)
1028                 if (!strcmp(f->file_name, fname))
1029                         return i;
1030
1031         return -1;
1032 }
1033
1034 /*
1035  * For log usage, where we add/open/close files automatically
1036  */
1037 void free_release_files(struct thread_data *td)
1038 {
1039         close_files(td);
1040         td->files_index = 0;
1041         td->nr_normal_files = 0;
1042 }