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 && !td_write(td)) {
 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         td->io_ops->close_file(td, f);
 250         return 0;
 251 err:
 252         td->io_ops->close_file(td, f);
 253         return 1;
 254 }
 255
 256 static int get_file_size(struct thread_data *td, struct fio_file *f)
 257 {
 258         int ret = 0;
 259
 260         if (fio_file_size_known(f))
 261                 return 0;
 262
 263         if (f->filetype == FIO_TYPE_FILE)
 264                 ret = file_size(td, f);
 265         else if (f->filetype == FIO_TYPE_BD)
 266                 ret = bdev_size(td, f);
 267         else
 268                 f->real_file_size = -1;
 269
 270         if (ret)
 271                 return ret;
 272
 273         if (f->file_offset > f->real_file_size) {
 274                 log_err("%s: offset extends end (%Lu > %Lu)\n", td->o.name,
 275                                         f->file_offset, f->real_file_size);
 276                 return 1;
 277         }
 278
 279         fio_file_set_size_known(f);
 280         return 0;
 281 }
 282
 283 static int __file_invalidate_cache(struct thread_data *td, struct fio_file *f,
 284                                    unsigned long long off,
 285                                    unsigned long long len)
 286 {
 287         int ret = 0;
 288
 289         if (len == -1ULL)
 290                 len = f->io_size;
 291         if (off == -1ULL)
 292                 off = f->file_offset;
 293
 294         if (len == -1ULL || off == -1ULL)
 295                 return 0;
 296
 297         dprint(FD_IO, "invalidate cache %s: %llu/%llu\n", f->file_name, off,
 298                                                                 len);
 299
 300         /*
 301          * FIXME: add blockdev flushing too
 302          */
 303         if (f->mmap_ptr)
 304                 ret = madvise(f->mmap_ptr, f->mmap_sz, MADV_DONTNEED);
 305         else if (f->filetype == FIO_TYPE_FILE) {
 306                 ret = fadvise(f->fd, off, len, POSIX_FADV_DONTNEED);
 307         } else if (f->filetype == FIO_TYPE_BD) {
 308                 ret = blockdev_invalidate_cache(f->fd);
 309                 if (ret < 0 && errno == EACCES && geteuid()) {
 310                         if (!root_warn) {
 311                                 log_err("fio: only root may flush block "
 312                                         "devices. Cache flush bypassed!\n");
 313                                 root_warn = 1;
 314                         }
 315                         ret = 0;
 316                 }
 317         } else if (f->filetype == FIO_TYPE_CHAR || f->filetype == FIO_TYPE_PIPE)
 318                 ret = 0;
 319
 320         if (ret < 0) {
 321                 td_verror(td, errno, "invalidate_cache");
 322                 return 1;
 323         } else if (ret > 0) {
 324                 td_verror(td, ret, "invalidate_cache");
 325                 return 1;
 326         }
 327
 328         return ret;
 329
 330 }
 331
 332 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
 333 {
 334         if (!fio_file_open(f))
 335                 return 0;
 336
 337         return __file_invalidate_cache(td, f, -1ULL, -1ULL);
 338 }
 339
 340 int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
 341 {
 342         int ret = 0;
 343
 344         dprint(FD_FILE, "fd close %s\n", f->file_name);
 345
 346         remove_file_hash(f);
 347
 348         if (close(f->fd) < 0)
 349                 ret = errno;
 350
 351         f->fd = -1;
 352         return ret;
 353 }
 354
 355 static int file_lookup_open(struct fio_file *f, int flags)
 356 {
 357         struct fio_file *__f;
 358         int from_hash;
 359
 360         __f = lookup_file_hash(f->file_name);
 361         if (__f) {
 362                 dprint(FD_FILE, "found file in hash %s\n", f->file_name);
 363                 /*
 364                  * racy, need the __f->lock locked
 365                  */
 366                 f->lock = __f->lock;
 367                 f->lock_owner = __f->lock_owner;
 368                 f->lock_batch = __f->lock_batch;
 369                 f->lock_ddir = __f->lock_ddir;
 370                 from_hash = 1;
 371         } else {
 372                 dprint(FD_FILE, "file not found in hash %s\n", f->file_name);
 373                 from_hash = 0;
 374         }
 375
 376         f->fd = open(f->file_name, flags, 0600);
 377         return from_hash;
 378 }
 379
 380 int generic_open_file(struct thread_data *td, struct fio_file *f)
 381 {
 382         int is_std = 0;
 383         int flags = 0;
 384         int from_hash = 0;
 385
 386         dprint(FD_FILE, "fd open %s\n", f->file_name);
 387
 388         if (!strcmp(f->file_name, "-")) {
 389                 if (td_rw(td)) {
 390                         log_err("fio: can't read/write to stdin/out\n");
 391                         return 1;
 392                 }
 393                 is_std = 1;
 394
 395                 /*
 396                  * move output logging to stderr, if we are writing to stdout
 397                  */
 398                 if (td_write(td))
 399                         f_out = stderr;
 400         }
 401
 402         if (td->o.odirect)
 403                 flags |= OS_O_DIRECT;
 404         if (td->o.sync_io)
 405                 flags |= O_SYNC;
 406         if (f->filetype != FIO_TYPE_FILE)
 407                 flags |= FIO_O_NOATIME;
 408         if (td->o.create_on_open)
 409                 flags |= O_CREAT;
 410
 411 open_again:
 412         if (td_write(td)) {
 413                 if (!read_only)
 414                         flags |= O_RDWR;
 415
 416                 if (f->filetype == FIO_TYPE_FILE)
 417                         flags |= O_CREAT;
 418
 419                 if (is_std)
 420                         f->fd = dup(STDOUT_FILENO);
 421                 else
 422                         from_hash = file_lookup_open(f, flags);
 423         } else {
 424                 if (f->filetype == FIO_TYPE_CHAR && !read_only)
 425                         flags |= O_RDWR;
 426                 else
 427                         flags |= O_RDONLY;
 428
 429                 if (is_std)
 430                         f->fd = dup(STDIN_FILENO);
 431                 else
 432                         from_hash = file_lookup_open(f, flags);
 433         }
 434
 435         if (f->fd == -1) {
 436                 char buf[FIO_VERROR_SIZE];
 437                 int __e = errno;
 438
 439                 if (__e == EPERM && (flags & FIO_O_NOATIME)) {
 440                         flags &= ~FIO_O_NOATIME;
 441                         goto open_again;
 442                 }
 443
 444                 snprintf(buf, sizeof(buf) - 1, "open(%s)", f->file_name);
 445
 446                 td_verror(td, __e, buf);
 447         }
 448
 449         if (!from_hash && f->fd != -1) {
 450                 if (add_file_hash(f)) {
 451                         int ret;
 452
 453                         /*
 454                          * OK to ignore, we haven't done anything with it
 455                          */
 456                         ret = generic_close_file(td, f);
 457                         goto open_again;
 458                 }
 459         }
 460
 461         return 0;
 462 }
 463
 464 int generic_get_file_size(struct thread_data *td, struct fio_file *f)
 465 {
 466         return get_file_size(td, f);
 467 }
 468
 469 /*
 470  * open/close all files, so that ->real_file_size gets set
 471  */
 472 static int get_file_sizes(struct thread_data *td)
 473 {
 474         struct fio_file *f;
 475         unsigned int i;
 476         int err = 0;
 477
 478         for_each_file(td, f, i) {
 479                 dprint(FD_FILE, "get file size for %p/%d/%p\n", f, i,
 480                                                                 f->file_name);
 481
 482                 if (td_io_get_file_size(td, f)) {
 483                         if (td->error != ENOENT) {
 484                                 log_err("%s\n", td->verror);
 485                                 err = 1;
 486                         }
 487                         clear_error(td);
 488                 }
 489
 490                 if (f->real_file_size == -1ULL && td->o.size)
 491                         f->real_file_size = td->o.size / td->o.nr_files;
 492         }
 493
 494         return err;
 495 }
 496
 497 /*
 498  * Open the files and setup files sizes, creating files if necessary.
 499  */
 500 int setup_files(struct thread_data *td)
 501 {
 502         unsigned long long total_size, extend_size;
 503         struct fio_file *f;
 504         unsigned int i;
 505         int err = 0, need_extend;
 506
 507         dprint(FD_FILE, "setup files\n");
 508
 509         if (td->o.read_iolog_file)
 510                 return 0;
 511
 512         /*
 513          * if ioengine defines a setup() method, it's responsible for
 514          * opening the files and setting f->real_file_size to indicate
 515          * the valid range for that file.
 516          */
 517         if (td->io_ops->setup)
 518                 err = td->io_ops->setup(td);
 519         else
 520                 err = get_file_sizes(td);
 521
 522         if (err)
 523                 return err;
 524
 525         /*
 526          * check sizes. if the files/devices do not exist and the size
 527          * isn't passed to fio, abort.
 528          */
 529         total_size = 0;
 530         for_each_file(td, f, i) {
 531                 if (f->real_file_size == -1ULL)
 532                         total_size = -1ULL;
 533                 else
 534                         total_size += f->real_file_size;
 535         }
 536
 537         /*
 538          * device/file sizes are zero and no size given, punt
 539          */
 540         if ((!total_size || total_size == -1ULL) && !td->o.size &&
 541             !(td->io_ops->flags & FIO_NOIO) && !td->o.fill_device) {
 542                 log_err("%s: you need to specify size=\n", td->o.name);
 543                 td_verror(td, EINVAL, "total_file_size");
 544                 return 1;
 545         }
 546
 547         /*
 548          * now file sizes are known, so we can set ->io_size. if size= is
 549          * not given, ->io_size is just equal to ->real_file_size. if size
 550          * is given, ->io_size is size / nr_files.
 551          */
 552         extend_size = total_size = 0;
 553         need_extend = 0;
 554         for_each_file(td, f, i) {
 555                 f->file_offset = td->o.start_offset;
 556
 557                 if (!td->o.file_size_low) {
 558                         /*
 559                          * no file size range given, file size is equal to
 560                          * total size divided by number of files. if that is
 561                          * zero, set it to the real file size.
 562                          */
 563                         f->io_size = td->o.size / td->o.nr_files;
 564                         if (!f->io_size)
 565                                 f->io_size = f->real_file_size - f->file_offset;
 566                 } else if (f->real_file_size < td->o.file_size_low ||
 567                            f->real_file_size > td->o.file_size_high) {
 568                         if (f->file_offset > td->o.file_size_low)
 569                                 goto err_offset;
 570                         /*
 571                          * file size given. if it's fixed, use that. if it's a
 572                          * range, generate a random size in-between.
 573                          */
 574                         if (td->o.file_size_low == td->o.file_size_high) {
 575                                 f->io_size = td->o.file_size_low
 576                                                 - f->file_offset;
 577                         } else {
 578                                 f->io_size = get_rand_file_size(td)
 579                                                 - f->file_offset;
 580                         }
 581                 } else
 582                         f->io_size = f->real_file_size - f->file_offset;
 583
 584                 if (f->io_size == -1ULL)
 585                         total_size = -1ULL;
 586                 else
 587                         total_size += f->io_size;
 588
 589                 if (f->filetype == FIO_TYPE_FILE &&
 590                     (f->io_size + f->file_offset) > f->real_file_size &&
 591                     !(td->io_ops->flags & FIO_DISKLESSIO)) {
 592                         if (!td->o.create_on_open) {
 593                                 need_extend++;
 594                                 extend_size += (f->io_size + f->file_offset);
 595                         } else
 596                                 f->real_file_size = f->io_size + f->file_offset;
 597                         fio_file_set_extend(f);
 598                 }
 599         }
 600
 601         if (!td->o.size || td->o.size > total_size)
 602                 td->o.size = total_size;
 603
 604         /*
 605          * See if we need to extend some files
 606          */
 607         if (need_extend) {
 608                 temp_stall_ts = 1;
 609                 if (!terse_output)
 610                         log_info("%s: Laying out IO file(s) (%u file(s) /"
 611                                  " %LuMiB)\n", td->o.name, need_extend,
 612                                         extend_size >> 20);
 613
 614                 for_each_file(td, f, i) {
 615                         unsigned long long old_len = -1ULL, extend_len = -1ULL;
 616
 617                         if (!fio_file_extend(f))
 618                                 continue;
 619
 620                         assert(f->filetype == FIO_TYPE_FILE);
 621                         fio_file_clear_extend(f);
 622                         if (!td->o.fill_device) {
 623                                 old_len = f->real_file_size;
 624                                 extend_len = f->io_size + f->file_offset - old_len;
 625                         }
 626                         f->real_file_size = (f->io_size + f->file_offset);
 627                         err = extend_file(td, f);
 628                         if (err)
 629                                 break;
 630
 631                         err = __file_invalidate_cache(td, f, old_len,
 632                                                                 extend_len);
 633                         close(f->fd);
 634                         f->fd = -1;
 635                         if (err)
 636                                 break;
 637                 }
 638                 temp_stall_ts = 0;
 639         }
 640
 641         if (err)
 642                 return err;
 643
 644         if (!td->o.zone_size)
 645                 td->o.zone_size = td->o.size;
 646
 647         /*
 648          * iolog already set the total io size, if we read back
 649          * stored entries.
 650          */
 651         if (!td->o.read_iolog_file)
 652                 td->total_io_size = td->o.size * td->o.loops;
 653         return 0;
 654 err_offset:
 655         log_err("%s: you need to specify valid offset=\n", td->o.name);
 656         return 1;
 657 }
 658
 659 int pre_read_files(struct thread_data *td)
 660 {
 661         struct fio_file *f;
 662         unsigned int i;
 663
 664         dprint(FD_FILE, "pre_read files\n");
 665
 666         for_each_file(td, f, i) {
 667                 pre_read_file(td, f);
 668         }
 669
 670         return 1;
 671 }
 672
 673 int init_random_map(struct thread_data *td)
 674 {
 675         unsigned long long blocks, num_maps;
 676         struct fio_file *f;
 677         unsigned int i;
 678
 679         if (td->o.norandommap || !td_random(td))
 680                 return 0;
 681
 682         for_each_file(td, f, i) {
 683                 blocks = (f->real_file_size + td->o.rw_min_bs - 1) /
 684                                 (unsigned long long) td->o.rw_min_bs;
 685                 num_maps = (blocks + BLOCKS_PER_MAP - 1) /
 686                                 (unsigned long long) BLOCKS_PER_MAP;
 687                 f->file_map = smalloc(num_maps * sizeof(int));
 688                 if (f->file_map) {
 689                         f->num_maps = num_maps;
 690                         continue;
 691                 }
 692                 if (!td->o.softrandommap) {
 693                         log_err("fio: failed allocating random map. If running"
 694                                 " a large number of jobs, try the 'norandommap'"
 695                                 " option or set 'softrandommap'. Or give"
 696                                 " a larger --alloc-size to fio.\n");
 697                         return 1;
 698                 }
 699
 700                 log_info("fio: file %s failed allocating random map. Running "
 701                          "job without.\n", f->file_name);
 702                 f->num_maps = 0;
 703         }
 704
 705         return 0;
 706 }
 707
 708 void close_files(struct thread_data *td)
 709 {
 710         struct fio_file *f;
 711         unsigned int i;
 712
 713         for_each_file(td, f, i) {
 714                 if (fio_file_open(f))
 715                         td_io_close_file(td, f);
 716         }
 717 }
 718
 719 void close_and_free_files(struct thread_data *td)
 720 {
 721         struct fio_file *f;
 722         unsigned int i;
 723
 724         dprint(FD_FILE, "close files\n");
 725
 726         for_each_file(td, f, i) {
 727                 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
 728                         dprint(FD_FILE, "free unlink %s\n", f->file_name);
 729                         unlink(f->file_name);
 730                 }
 731
 732                 if (fio_file_open(f))
 733                         td_io_close_file(td, f);
 734
 735                 remove_file_hash(f);
 736
 737                 sfree(f->file_name);
 738                 f->file_name = NULL;
 739
 740                 if (f->file_map) {
 741                         sfree(f->file_map);
 742                         f->file_map = NULL;
 743                 }
 744                 sfree(f);
 745         }
 746
 747         td->o.filename = NULL;
 748         free(td->files);
 749         td->files_index = 0;
 750         td->files = NULL;
 751         td->o.nr_files = 0;
 752 }
 753
 754 static void get_file_type(struct fio_file *f)
 755 {
 756         struct stat sb;
 757
 758         if (!strcmp(f->file_name, "-"))
 759                 f->filetype = FIO_TYPE_PIPE;
 760         else
 761                 f->filetype = FIO_TYPE_FILE;
 762
 763         if (!lstat(f->file_name, &sb)) {
 764                 if (S_ISBLK(sb.st_mode))
 765                         f->filetype = FIO_TYPE_BD;
 766                 else if (S_ISCHR(sb.st_mode))
 767                         f->filetype = FIO_TYPE_CHAR;
 768                 else if (S_ISFIFO(sb.st_mode))
 769                         f->filetype = FIO_TYPE_PIPE;
 770         }
 771 }
 772
 773 int add_file(struct thread_data *td, const char *fname)
 774 {
 775         int cur_files = td->files_index;
 776         char file_name[PATH_MAX];
 777         struct fio_file *f;
 778         int len = 0;
 779
 780         dprint(FD_FILE, "add file %s\n", fname);
 781
 782         f = smalloc(sizeof(*f));
 783         if (!f) {
 784                 log_err("fio: smalloc OOM\n");
 785                 assert(0);
 786         }
 787
 788         f->fd = -1;
 789
 790         if (td->files_size <= td->files_index) {
 791                 int new_size = td->o.nr_files + 1;
 792
 793                 dprint(FD_FILE, "resize file array to %d files\n", new_size);
 794
 795                 td->files = realloc(td->files, new_size * sizeof(f));
 796                 td->files_size = new_size;
 797         }
 798         td->files[cur_files] = f;
 799
 800         /*
 801          * init function, io engine may not be loaded yet
 802          */
 803         if (td->io_ops && (td->io_ops->flags & FIO_DISKLESSIO))
 804                 f->real_file_size = -1ULL;
 805
 806         if (td->o.directory)
 807                 len = sprintf(file_name, "%s/", td->o.directory);
 808
 809         sprintf(file_name + len, "%s", fname);
 810         f->file_name = smalloc_strdup(file_name);
 811         if (!f->file_name) {
 812                 log_err("fio: smalloc OOM\n");
 813                 assert(0);
 814         }
 815
 816         get_file_type(f);
 817
 818         switch (td->o.file_lock_mode) {
 819         case FILE_LOCK_NONE:
 820                 break;
 821         case FILE_LOCK_READWRITE:
 822                 f->lock = fio_mutex_rw_init();
 823                 break;
 824         case FILE_LOCK_EXCLUSIVE:
 825                 f->lock = fio_mutex_init(1);
 826                 break;
 827         default:
 828                 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
 829                 assert(0);
 830         }
 831
 832         td->files_index++;
 833         if (f->filetype == FIO_TYPE_FILE)
 834                 td->nr_normal_files++;
 835
 836         dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name,
 837                                                         cur_files);
 838
 839         return cur_files;
 840 }
 841
 842 void get_file(struct fio_file *f)
 843 {
 844         dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
 845         assert(fio_file_open(f));
 846         f->references++;
 847 }
 848
 849 int put_file(struct thread_data *td, struct fio_file *f)
 850 {
 851         int f_ret = 0, ret = 0;
 852
 853         dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
 854
 855         if (!fio_file_open(f)) {
 856                 assert(f->fd == -1);
 857                 return 0;
 858         }
 859
 860         assert(f->references);
 861         if (--f->references)
 862                 return 0;
 863
 864         if (should_fsync(td) && td->o.fsync_on_close)
 865                 f_ret = fsync(f->fd);
 866
 867         if (td->io_ops->close_file)
 868                 ret = td->io_ops->close_file(td, f);
 869
 870         if (!ret)
 871                 ret = f_ret;
 872
 873         td->nr_open_files--;
 874         fio_file_clear_open(f);
 875         assert(f->fd == -1);
 876         return ret;
 877 }
 878
 879 void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
 880 {
 881         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
 882                 return;
 883
 884         if (f->lock_owner == td && f->lock_batch--)
 885                 return;
 886
 887         if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
 888                 if (ddir == DDIR_READ)
 889                         fio_mutex_down_read(f->lock);
 890                 else
 891                         fio_mutex_down_write(f->lock);
 892         } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
 893                 fio_mutex_down(f->lock);
 894
 895         f->lock_owner = td;
 896         f->lock_batch = td->o.lockfile_batch;
 897         f->lock_ddir = ddir;
 898 }
 899
 900 void unlock_file(struct thread_data *td, struct fio_file *f)
 901 {
 902         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
 903                 return;
 904         if (f->lock_batch)
 905                 return;
 906
 907         if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
 908                 const int is_read = f->lock_ddir == DDIR_READ;
 909                 int val = fio_mutex_getval(f->lock);
 910
 911                 if ((is_read && val == 1) || (!is_read && val == -1))
 912                         f->lock_owner = NULL;
 913
 914                 if (is_read)
 915                         fio_mutex_up_read(f->lock);
 916                 else
 917                         fio_mutex_up_write(f->lock);
 918         } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE) {
 919                 int val = fio_mutex_getval(f->lock);
 920
 921                 if (val == 0)
 922                         f->lock_owner = NULL;
 923
 924                 fio_mutex_up(f->lock);
 925         }
 926 }
 927
 928 void unlock_file_all(struct thread_data *td, struct fio_file *f)
 929 {
 930         if (f->lock_owner != td)
 931                 return;
 932
 933         f->lock_batch = 0;
 934         unlock_file(td, f);
 935 }
 936
 937 static int recurse_dir(struct thread_data *td, const char *dirname)
 938 {
 939         struct dirent *dir;
 940         int ret = 0;
 941         DIR *D;
 942
 943         D = opendir(dirname);
 944         if (!D) {
 945                 char buf[FIO_VERROR_SIZE];
 946
 947                 snprintf(buf, FIO_VERROR_SIZE - 1, "opendir(%s)", dirname);
 948                 td_verror(td, errno, buf);
 949                 return 1;
 950         }
 951
 952         while ((dir = readdir(D)) != NULL) {
 953                 char full_path[PATH_MAX];
 954                 struct stat sb;
 955
 956                 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
 957                         continue;
 958
 959                 sprintf(full_path, "%s/%s", dirname, dir->d_name);
 960
 961                 if (lstat(full_path, &sb) == -1) {
 962                         if (errno != ENOENT) {
 963                                 td_verror(td, errno, "stat");
 964                                 return 1;
 965                         }
 966                 }
 967
 968                 if (S_ISREG(sb.st_mode)) {
 969                         add_file(td, full_path);
 970                         td->o.nr_files++;
 971                         continue;
 972                 }
 973                 if (!S_ISDIR(sb.st_mode))
 974                         continue;
 975
 976                 ret = recurse_dir(td, full_path);
 977                 if (ret)
 978                         break;
 979         }
 980
 981         closedir(D);
 982         return ret;
 983 }
 984
 985 int add_dir_files(struct thread_data *td, const char *path)
 986 {
 987         int ret = recurse_dir(td, path);
 988
 989         if (!ret)
 990                 log_info("fio: opendir added %d files\n", td->o.nr_files);
 991
 992         return ret;
 993 }
 994
 995 void dup_files(struct thread_data *td, struct thread_data *org)
 996 {
 997         struct fio_file *f;
 998         unsigned int i;
 999
1000         dprint(FD_FILE, "dup files: %d\n", org->files_index);
1001
1002         if (!org->files)
1003                 return;
1004
1005         td->files = malloc(org->files_index * sizeof(f));
1006
1007         for_each_file(org, f, i) {
1008                 struct fio_file *__f;
1009
1010                 __f = smalloc(sizeof(*__f));
1011                 if (!__f) {
1012                         log_err("fio: smalloc OOM\n");
1013                         assert(0);
1014                 }
1015                 __f->fd = -1;
1016
1017                 if (f->file_name) {
1018                         __f->file_name = smalloc_strdup(f->file_name);
1019                         if (!__f->file_name) {
1020                                 log_err("fio: smalloc OOM\n");
1021                                 assert(0);
1022                         }
1023
1024                         __f->filetype = f->filetype;
1025                 }
1026
1027                 td->files[i] = __f;
1028         }
1029 }
1030
1031 /*
1032  * Returns the index that matches the filename, or -1 if not there
1033  */
1034 int get_fileno(struct thread_data *td, const char *fname)
1035 {
1036         struct fio_file *f;
1037         unsigned int i;
1038
1039         for_each_file(td, f, i)
1040                 if (!strcmp(f->file_name, fname))
1041                         return i;
1042
1043         return -1;
1044 }
1045
1046 /*
1047  * For log usage, where we add/open/close files automatically
1048  */
1049 void free_release_files(struct thread_data *td)
1050 {
1051         close_files(td);
1052         td->files_index = 0;
1053         td->nr_normal_files = 0;
1054 }