filesetup.c

   1 #include <unistd.h>
   2 #include <fcntl.h>
   3 #include <string.h>
   4 #include <assert.h>
   5 #include <dirent.h>
   6 #include <libgen.h>
   7 #include <sys/stat.h>
   8 #include <sys/mman.h>
   9 #include <sys/types.h>
  10
  11 #include "fio.h"
  12 #include "smalloc.h"
  13 #include "filehash.h"
  14 #include "os/os.h"
  15
  16 #ifdef FIO_HAVE_LINUX_FALLOCATE
  17 #include <linux/falloc.h>
  18 #endif
  19
  20 static int root_warn;
  21
  22 static inline void clear_error(struct thread_data *td)
  23 {
  24         td->error = 0;
  25         td->verror[0] = '\0';
  26 }
  27
  28 /*
  29  * Leaves f->fd open on success, caller must close
  30  */
  31 static int extend_file(struct thread_data *td, struct fio_file *f)
  32 {
  33         int r, new_layout = 0, unlink_file = 0, flags;
  34         unsigned long long left;
  35         unsigned int bs;
  36         char *b;
  37
  38         if (read_only) {
  39                 log_err("fio: refusing extend of file due to read-only\n");
  40                 return 0;
  41         }
  42
  43         /*
  44          * check if we need to lay the file out complete again. fio
  45          * does that for operations involving reads, or for writes
  46          * where overwrite is set
  47          */
  48         if (td_read(td) || (td_write(td) && td->o.overwrite) ||
  49             (td_write(td) && td->io_ops->flags & FIO_NOEXTEND))
  50                 new_layout = 1;
  51         if (td_write(td) && !td->o.overwrite)
  52                 unlink_file = 1;
  53
  54         if (unlink_file || new_layout) {
  55                 dprint(FD_FILE, "layout unlink %s\n", f->file_name);
  56                 if ((unlink(f->file_name) < 0) && (errno != ENOENT)) {
  57                         td_verror(td, errno, "unlink");
  58                         return 1;
  59                 }
  60         }
  61
  62         flags = O_WRONLY | O_CREAT;
  63         if (new_layout)
  64                 flags |= O_TRUNC;
  65
  66         dprint(FD_FILE, "open file %s, flags %x\n", f->file_name, flags);
  67         f->fd = open(f->file_name, flags, 0644);
  68         if (f->fd < 0) {
  69                 td_verror(td, errno, "open");
  70                 return 1;
  71         }
  72
  73 #ifdef FIO_HAVE_FALLOCATE
  74         if (!td->o.fill_device) {
  75                 switch (td->o.fallocate_mode) {
  76                 case FIO_FALLOCATE_NONE:
  77                         break;
  78                 case FIO_FALLOCATE_POSIX:
  79                         dprint(FD_FILE, "posix_fallocate file %s size %llu\n",
  80                                  f->file_name, f->real_file_size);
  81
  82                         r = posix_fallocate(f->fd, 0, f->real_file_size);
  83                         if (r > 0) {
  84                                 log_err("fio: posix_fallocate fails: %s\n",
  85                                                 strerror(r));
  86                         }
  87                         break;
  88 #ifdef FIO_HAVE_LINUX_FALLOCATE
  89                 case FIO_FALLOCATE_KEEP_SIZE:
  90                         dprint(FD_FILE,
  91                                 "fallocate(FALLOC_FL_KEEP_SIZE) "
  92                                 "file %s size %llu\n",
  93                                 f->file_name, f->real_file_size);
  94
  95                         r = fallocate(f->fd, FALLOC_FL_KEEP_SIZE, 0,
  96                                         f->real_file_size);
  97                         if (r != 0) {
  98                                 td_verror(td, errno, "fallocate");
  99                         }
 100                         break;
 101 #endif /* FIO_HAVE_LINUX_FALLOCATE */
 102                 default:
 103                         log_err("fio: unknown fallocate mode: %d\n",
 104                                 td->o.fallocate_mode);
 105                         assert(0);
 106                 }
 107         }
 108 #endif /* FIO_HAVE_FALLOCATE */
 109
 110         if (!new_layout)
 111                 goto done;
 112
 113         /*
 114          * The size will be -1ULL when fill_device is used, so don't truncate
 115          * or fallocate this file, just write it
 116          */
 117         if (!td->o.fill_device) {
 118                 dprint(FD_FILE, "truncate file %s, size %llu\n", f->file_name,
 119                                                         f->real_file_size);
 120                 if (ftruncate(f->fd, f->real_file_size) == -1) {
 121                         td_verror(td, errno, "ftruncate");
 122                         goto err;
 123                 }
 124         }
 125
 126         b = malloc(td->o.max_bs[DDIR_WRITE]);
 127         memset(b, 0, td->o.max_bs[DDIR_WRITE]);
 128
 129         left = f->real_file_size;
 130         while (left && !td->terminate) {
 131                 bs = td->o.max_bs[DDIR_WRITE];
 132                 if (bs > left)
 133                         bs = left;
 134
 135                 r = write(f->fd, b, bs);
 136
 137                 if (r > 0) {
 138                         left -= r;
 139                         continue;
 140                 } else {
 141                         if (r < 0) {
 142                                 int __e = errno;
 143
 144                                 if (__e == ENOSPC) {
 145                                         if (td->o.fill_device)
 146                                                 break;
 147                                         log_info("fio: ENOSPC on laying out "
 148                                                  "file, stopping\n");
 149                                         break;
 150                                 }
 151                                 td_verror(td, errno, "write");
 152                         } else
 153                                 td_verror(td, EIO, "write");
 154
 155                         break;
 156                 }
 157         }
 158
 159         if (td->terminate) {
 160                 dprint(FD_FILE, "terminate unlink %s\n", f->file_name);
 161                 unlink(f->file_name);
 162         } else if (td->o.create_fsync) {
 163                 if (fsync(f->fd) < 0) {
 164                         td_verror(td, errno, "fsync");
 165                         goto err;
 166                 }
 167         }
 168         if (td->o.fill_device && !td_write(td)) {
 169                 fio_file_clear_size_known(f);
 170                 if (td_io_get_file_size(td, f))
 171                         goto err;
 172                 if (f->io_size > f->real_file_size)
 173                         f->io_size = f->real_file_size;
 174         }
 175
 176         free(b);
 177 done:
 178         return 0;
 179 err:
 180         close(f->fd);
 181         f->fd = -1;
 182         return 1;
 183 }
 184
 185 static int pre_read_file(struct thread_data *td, struct fio_file *f)
 186 {
 187         int r, did_open = 0, old_runstate;
 188         unsigned long long left;
 189         unsigned int bs;
 190         char *b;
 191
 192         if (td->io_ops->flags & FIO_PIPEIO)
 193                 return 0;
 194
 195         if (!fio_file_open(f)) {
 196                 if (td->io_ops->open_file(td, f)) {
 197                         log_err("fio: cannot pre-read, failed to open file\n");
 198                         return 1;
 199                 }
 200                 did_open = 1;
 201         }
 202
 203         old_runstate = td->runstate;
 204         td_set_runstate(td, TD_PRE_READING);
 205
 206         bs = td->o.max_bs[DDIR_READ];
 207         b = malloc(bs);
 208         memset(b, 0, bs);
 209
 210         lseek(f->fd, f->file_offset, SEEK_SET);
 211         left = f->io_size;
 212
 213         while (left && !td->terminate) {
 214                 if (bs > left)
 215                         bs = left;
 216
 217                 r = read(f->fd, b, bs);
 218
 219                 if (r == (int) bs) {
 220                         left -= bs;
 221                         continue;
 222                 } else {
 223                         td_verror(td, EIO, "pre_read");
 224                         break;
 225                 }
 226         }
 227
 228         td_set_runstate(td, old_runstate);
 229
 230         if (did_open)
 231                 td->io_ops->close_file(td, f);
 232         free(b);
 233         return 0;
 234 }
 235
 236 static unsigned long long get_rand_file_size(struct thread_data *td)
 237 {
 238         unsigned long long ret, sized;
 239         unsigned long r;
 240
 241         if (td->o.use_os_rand) {
 242                 r = os_random_long(&td->file_size_state);
 243                 sized = td->o.file_size_high - td->o.file_size_low;
 244                 ret = (unsigned long long) ((double) sized * (r / (OS_RAND_MAX + 1.0)));
 245         } else {
 246                 r = __rand(&td->__file_size_state);
 247                 sized = td->o.file_size_high - td->o.file_size_low;
 248                 ret = (unsigned long long) ((double) sized * (r / (FRAND_MAX + 1.0)));
 249         }
 250
 251         ret += td->o.file_size_low;
 252         ret -= (ret % td->o.rw_min_bs);
 253         return ret;
 254 }
 255
 256 static int file_size(struct thread_data *td, struct fio_file *f)
 257 {
 258         struct stat st;
 259
 260         if (stat(f->file_name, &st) == -1) {
 261                 td_verror(td, errno, "fstat");
 262                 return 1;
 263         }
 264
 265         f->real_file_size = st.st_size;
 266         return 0;
 267 }
 268
 269 static int bdev_size(struct thread_data *td, struct fio_file *f)
 270 {
 271         unsigned long long bytes = 0;
 272         int r;
 273
 274         if (td->io_ops->open_file(td, f)) {
 275                 log_err("fio: failed opening blockdev %s for size check\n",
 276                         f->file_name);
 277                 return 1;
 278         }
 279
 280         r = blockdev_size(f, &bytes);
 281         if (r) {
 282                 td_verror(td, r, "blockdev_size");
 283                 goto err;
 284         }
 285
 286         if (!bytes) {
 287                 log_err("%s: zero sized block device?\n", f->file_name);
 288                 goto err;
 289         }
 290
 291         f->real_file_size = bytes;
 292         td->io_ops->close_file(td, f);
 293         return 0;
 294 err:
 295         td->io_ops->close_file(td, f);
 296         return 1;
 297 }
 298
 299 static int char_size(struct thread_data *td, struct fio_file *f)
 300 {
 301 #ifdef FIO_HAVE_CHARDEV_SIZE
 302         unsigned long long bytes = 0;
 303         int r;
 304
 305         if (td->io_ops->open_file(td, f)) {
 306                 log_err("fio: failed opening blockdev %s for size check\n",
 307                         f->file_name);
 308                 return 1;
 309         }
 310
 311         r = chardev_size(f, &bytes);
 312         if (r) {
 313                 td_verror(td, r, "chardev_size");
 314                 goto err;
 315         }
 316
 317         if (!bytes) {
 318                 log_err("%s: zero sized char device?\n", f->file_name);
 319                 goto err;
 320         }
 321
 322         f->real_file_size = bytes;
 323         td->io_ops->close_file(td, f);
 324         return 0;
 325 err:
 326         td->io_ops->close_file(td, f);
 327         return 1;
 328 #else
 329         f->real_file_size = -1ULL;
 330         return 0;
 331 #endif
 332 }
 333
 334 static int get_file_size(struct thread_data *td, struct fio_file *f)
 335 {
 336         int ret = 0;
 337
 338         if (fio_file_size_known(f))
 339                 return 0;
 340
 341         if (f->filetype == FIO_TYPE_FILE)
 342                 ret = file_size(td, f);
 343         else if (f->filetype == FIO_TYPE_BD)
 344                 ret = bdev_size(td, f);
 345         else if (f->filetype == FIO_TYPE_CHAR)
 346                 ret = char_size(td, f);
 347         else
 348                 f->real_file_size = -1;
 349
 350         if (ret)
 351                 return ret;
 352
 353         if (f->file_offset > f->real_file_size) {
 354                 log_err("%s: offset extends end (%llu > %llu)\n", td->o.name,
 355                                         f->file_offset, f->real_file_size);
 356                 return 1;
 357         }
 358
 359         fio_file_set_size_known(f);
 360         return 0;
 361 }
 362
 363 static int __file_invalidate_cache(struct thread_data *td, struct fio_file *f,
 364                                    unsigned long long off,
 365                                    unsigned long long len)
 366 {
 367         int ret = 0;
 368
 369         if (len == -1ULL)
 370                 len = f->io_size;
 371         if (off == -1ULL)
 372                 off = f->file_offset;
 373
 374         if (len == -1ULL || off == -1ULL)
 375                 return 0;
 376
 377         dprint(FD_IO, "invalidate cache %s: %llu/%llu\n", f->file_name, off,
 378                                                                 len);
 379
 380         /*
 381          * FIXME: add blockdev flushing too
 382          */
 383         if (f->mmap_ptr) {
 384                 ret = posix_madvise(f->mmap_ptr, f->mmap_sz, POSIX_MADV_DONTNEED);
 385 #ifdef FIO_MADV_FREE
 386                 (void) posix_madvise(f->mmap_ptr, f->mmap_sz, FIO_MADV_FREE);
 387 #endif
 388         } else if (f->filetype == FIO_TYPE_FILE) {
 389                 ret = posix_fadvise(f->fd, off, len, POSIX_FADV_DONTNEED);
 390         } else if (f->filetype == FIO_TYPE_BD) {
 391                 ret = blockdev_invalidate_cache(f);
 392                 if (ret < 0 && errno == EACCES && geteuid()) {
 393                         if (!root_warn) {
 394                                 log_err("fio: only root may flush block "
 395                                         "devices. Cache flush bypassed!\n");
 396                                 root_warn = 1;
 397                         }
 398                         ret = 0;
 399                 }
 400         } else if (f->filetype == FIO_TYPE_CHAR || f->filetype == FIO_TYPE_PIPE)
 401                 ret = 0;
 402
 403         if (ret < 0) {
 404                 td_verror(td, errno, "invalidate_cache");
 405                 return 1;
 406         } else if (ret > 0) {
 407                 td_verror(td, ret, "invalidate_cache");
 408                 return 1;
 409         }
 410
 411         return ret;
 412
 413 }
 414
 415 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
 416 {
 417         if (!fio_file_open(f))
 418                 return 0;
 419
 420         return __file_invalidate_cache(td, f, -1ULL, -1ULL);
 421 }
 422
 423 int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
 424 {
 425         int ret = 0;
 426
 427         dprint(FD_FILE, "fd close %s\n", f->file_name);
 428
 429         remove_file_hash(f);
 430
 431         if (close(f->fd) < 0)
 432                 ret = errno;
 433
 434         f->fd = -1;
 435         return ret;
 436 }
 437
 438 static int file_lookup_open(struct fio_file *f, int flags)
 439 {
 440         struct fio_file *__f;
 441         int from_hash;
 442
 443         __f = lookup_file_hash(f->file_name);
 444         if (__f) {
 445                 dprint(FD_FILE, "found file in hash %s\n", f->file_name);
 446                 /*
 447                  * racy, need the __f->lock locked
 448                  */
 449                 f->lock = __f->lock;
 450                 f->lock_owner = __f->lock_owner;
 451                 f->lock_batch = __f->lock_batch;
 452                 f->lock_ddir = __f->lock_ddir;
 453                 from_hash = 1;
 454         } else {
 455                 dprint(FD_FILE, "file not found in hash %s\n", f->file_name);
 456                 from_hash = 0;
 457         }
 458
 459         f->fd = open(f->file_name, flags, 0600);
 460         return from_hash;
 461 }
 462
 463 int generic_open_file(struct thread_data *td, struct fio_file *f)
 464 {
 465         int is_std = 0;
 466         int flags = 0;
 467         int from_hash = 0;
 468
 469         dprint(FD_FILE, "fd open %s\n", f->file_name);
 470
 471         if (!strcmp(f->file_name, "-")) {
 472                 if (td_rw(td)) {
 473                         log_err("fio: can't read/write to stdin/out\n");
 474                         return 1;
 475                 }
 476                 is_std = 1;
 477
 478                 /*
 479                  * move output logging to stderr, if we are writing to stdout
 480                  */
 481                 if (td_write(td))
 482                         f_out = stderr;
 483         }
 484
 485         if (td->o.odirect)
 486                 flags |= OS_O_DIRECT;
 487         if (td->o.sync_io)
 488                 flags |= O_SYNC;
 489         if (f->filetype != FIO_TYPE_FILE)
 490                 flags |= FIO_O_NOATIME;
 491         if (td->o.create_on_open)
 492                 flags |= O_CREAT;
 493
 494 open_again:
 495         if (td_write(td)) {
 496                 if (!read_only)
 497                         flags |= O_RDWR;
 498
 499                 if (f->filetype == FIO_TYPE_FILE)
 500                         flags |= O_CREAT;
 501
 502                 if (is_std)
 503                         f->fd = dup(STDOUT_FILENO);
 504                 else
 505                         from_hash = file_lookup_open(f, flags);
 506         } else {
 507                 if (f->filetype == FIO_TYPE_CHAR && !read_only)
 508                         flags |= O_RDWR;
 509                 else
 510                         flags |= O_RDONLY;
 511
 512                 if (is_std)
 513                         f->fd = dup(STDIN_FILENO);
 514                 else
 515                         from_hash = file_lookup_open(f, flags);
 516         }
 517
 518         if (f->fd == -1) {
 519                 char buf[FIO_VERROR_SIZE];
 520                 int __e = errno;
 521
 522                 if (__e == EPERM && (flags & FIO_O_NOATIME)) {
 523                         flags &= ~FIO_O_NOATIME;
 524                         goto open_again;
 525                 }
 526
 527                 snprintf(buf, sizeof(buf) - 1, "open(%s)", f->file_name);
 528
 529                 if (__e == EINVAL && (flags & OS_O_DIRECT)) {
 530                         log_err("fio: looks like your file system does not " \
 531                                 "support direct=1/buffered=0\n");
 532                 }
 533
 534                 td_verror(td, __e, buf);
 535         }
 536
 537         if (!from_hash && f->fd != -1) {
 538                 if (add_file_hash(f)) {
 539                         int fio_unused ret;
 540
 541                         /*
 542                          * OK to ignore, we haven't done anything with it
 543                          */
 544                         ret = generic_close_file(td, f);
 545                         goto open_again;
 546                 }
 547         }
 548
 549         return 0;
 550 }
 551
 552 int generic_get_file_size(struct thread_data *td, struct fio_file *f)
 553 {
 554         return get_file_size(td, f);
 555 }
 556
 557 /*
 558  * open/close all files, so that ->real_file_size gets set
 559  */
 560 static int get_file_sizes(struct thread_data *td)
 561 {
 562         struct fio_file *f;
 563         unsigned int i;
 564         int err = 0;
 565
 566         for_each_file(td, f, i) {
 567                 dprint(FD_FILE, "get file size for %p/%d/%p\n", f, i,
 568                                                                 f->file_name);
 569
 570                 if (td_io_get_file_size(td, f)) {
 571                         if (td->error != ENOENT) {
 572                                 log_err("%s\n", td->verror);
 573                                 err = 1;
 574                         }
 575                         clear_error(td);
 576                 }
 577
 578                 if (f->real_file_size == -1ULL && td->o.size)
 579                         f->real_file_size = td->o.size / td->o.nr_files;
 580         }
 581
 582         return err;
 583 }
 584
 585 struct fio_mount {
 586         struct flist_head list;
 587         const char *base;
 588         char __base[256];
 589         unsigned int key;
 590 };
 591
 592 /*
 593  * Get free number of bytes for each file on each unique mount.
 594  */
 595 static unsigned long long get_fs_free_counts(struct thread_data *td)
 596 {
 597         struct flist_head *n, *tmp;
 598         unsigned long long ret = 0;
 599         struct fio_mount *fm;
 600         FLIST_HEAD(list);
 601         struct fio_file *f;
 602         unsigned int i;
 603
 604         for_each_file(td, f, i) {
 605                 struct stat sb;
 606                 char buf[256];
 607
 608                 if (f->filetype == FIO_TYPE_BD || f->filetype == FIO_TYPE_CHAR) {
 609                         if (f->real_file_size != -1ULL)
 610                                 ret += f->real_file_size;
 611                         continue;
 612                 } else if (f->filetype != FIO_TYPE_FILE)
 613                         continue;
 614
 615                 strcpy(buf, f->file_name);
 616
 617                 if (stat(buf, &sb) < 0) {
 618                         if (errno != ENOENT)
 619                                 break;
 620                         strcpy(buf, ".");
 621                         if (stat(buf, &sb) < 0)
 622                                 break;
 623                 }
 624
 625                 fm = NULL;
 626                 flist_for_each(n, &list) {
 627                         fm = flist_entry(n, struct fio_mount, list);
 628                         if (fm->key == sb.st_dev)
 629                                 break;
 630
 631                         fm = NULL;
 632                 }
 633
 634                 if (fm)
 635                         continue;
 636
 637                 fm = malloc(sizeof(*fm));
 638                 strcpy(fm->__base, buf);
 639                 fm->base = basename(fm->__base);
 640                 fm->key = sb.st_dev;
 641                 flist_add(&fm->list, &list);
 642         }
 643
 644         flist_for_each_safe(n, tmp, &list) {
 645                 unsigned long long sz;
 646
 647                 fm = flist_entry(n, struct fio_mount, list);
 648                 flist_del(&fm->list);
 649
 650                 sz = get_fs_size(fm->base);
 651                 if (sz && sz != -1ULL)
 652                         ret += sz;
 653
 654                 free(fm);
 655         }
 656
 657         return ret;
 658 }
 659
 660 unsigned long long get_start_offset(struct thread_data *td)
 661 {
 662         return td->o.start_offset +
 663                 (td->thread_number - 1) * td->o.offset_increment;
 664 }
 665
 666 /*
 667  * Open the files and setup files sizes, creating files if necessary.
 668  */
 669 int setup_files(struct thread_data *td)
 670 {
 671         unsigned long long total_size, extend_size;
 672         struct fio_file *f;
 673         unsigned int i;
 674         int err = 0, need_extend;
 675
 676         dprint(FD_FILE, "setup files\n");
 677
 678         if (td->o.read_iolog_file)
 679                 goto done;
 680
 681         /*
 682          * if ioengine defines a setup() method, it's responsible for
 683          * opening the files and setting f->real_file_size to indicate
 684          * the valid range for that file.
 685          */
 686         if (td->io_ops->setup)
 687                 err = td->io_ops->setup(td);
 688         else
 689                 err = get_file_sizes(td);
 690
 691         if (err)
 692                 return err;
 693
 694         /*
 695          * check sizes. if the files/devices do not exist and the size
 696          * isn't passed to fio, abort.
 697          */
 698         total_size = 0;
 699         for_each_file(td, f, i) {
 700                 if (f->real_file_size == -1ULL)
 701                         total_size = -1ULL;
 702                 else
 703                         total_size += f->real_file_size;
 704         }
 705
 706         if (td->o.fill_device)
 707                 td->fill_device_size = get_fs_free_counts(td);
 708
 709         /*
 710          * device/file sizes are zero and no size given, punt
 711          */
 712         if ((!total_size || total_size == -1ULL) && !td->o.size &&
 713             !(td->io_ops->flags & FIO_NOIO) && !td->o.fill_device) {
 714                 log_err("%s: you need to specify size=\n", td->o.name);
 715                 td_verror(td, EINVAL, "total_file_size");
 716                 return 1;
 717         }
 718
 719         /*
 720          * now file sizes are known, so we can set ->io_size. if size= is
 721          * not given, ->io_size is just equal to ->real_file_size. if size
 722          * is given, ->io_size is size / nr_files.
 723          */
 724         extend_size = total_size = 0;
 725         need_extend = 0;
 726         for_each_file(td, f, i) {
 727                 f->file_offset = get_start_offset(td);
 728
 729                 if (!td->o.file_size_low) {
 730                         /*
 731                          * no file size range given, file size is equal to
 732                          * total size divided by number of files. if that is
 733                          * zero, set it to the real file size.
 734                          */
 735                         f->io_size = td->o.size / td->o.nr_files;
 736                         if (!f->io_size)
 737                                 f->io_size = f->real_file_size - f->file_offset;
 738                 } else if (f->real_file_size < td->o.file_size_low ||
 739                            f->real_file_size > td->o.file_size_high) {
 740                         if (f->file_offset > td->o.file_size_low)
 741                                 goto err_offset;
 742                         /*
 743                          * file size given. if it's fixed, use that. if it's a
 744                          * range, generate a random size in-between.
 745                          */
 746                         if (td->o.file_size_low == td->o.file_size_high) {
 747                                 f->io_size = td->o.file_size_low
 748                                                 - f->file_offset;
 749                         } else {
 750                                 f->io_size = get_rand_file_size(td)
 751                                                 - f->file_offset;
 752                         }
 753                 } else
 754                         f->io_size = f->real_file_size - f->file_offset;
 755
 756                 if (f->io_size == -1ULL)
 757                         total_size = -1ULL;
 758                 else
 759                         total_size += f->io_size;
 760
 761                 if (f->filetype == FIO_TYPE_FILE &&
 762                     (f->io_size + f->file_offset) > f->real_file_size &&
 763                     !(td->io_ops->flags & FIO_DISKLESSIO)) {
 764                         if (!td->o.create_on_open) {
 765                                 need_extend++;
 766                                 extend_size += (f->io_size + f->file_offset);
 767                         } else
 768                                 f->real_file_size = f->io_size + f->file_offset;
 769                         fio_file_set_extend(f);
 770                 }
 771         }
 772
 773         if (td->o.size_percent)
 774                 total_size = (total_size * td->o.size_percent) / 100;
 775
 776         if (!td->o.size || td->o.size > total_size)
 777                 td->o.size = total_size;
 778
 779         /*
 780          * See if we need to extend some files
 781          */
 782         if (need_extend) {
 783                 temp_stall_ts = 1;
 784                 if (!terse_output)
 785                         log_info("%s: Laying out IO file(s) (%u file(s) /"
 786                                  " %lluMB)\n", td->o.name, need_extend,
 787                                         extend_size >> 20);
 788
 789                 for_each_file(td, f, i) {
 790                         unsigned long long old_len = -1ULL, extend_len = -1ULL;
 791
 792                         if (!fio_file_extend(f))
 793                                 continue;
 794
 795                         assert(f->filetype == FIO_TYPE_FILE);
 796                         fio_file_clear_extend(f);
 797                         if (!td->o.fill_device) {
 798                                 old_len = f->real_file_size;
 799                                 extend_len = f->io_size + f->file_offset -
 800                                                 old_len;
 801                         }
 802                         f->real_file_size = (f->io_size + f->file_offset);
 803                         err = extend_file(td, f);
 804                         if (err)
 805                                 break;
 806
 807                         err = __file_invalidate_cache(td, f, old_len,
 808                                                                 extend_len);
 809                         close(f->fd);
 810                         f->fd = -1;
 811                         if (err)
 812                                 break;
 813                 }
 814                 temp_stall_ts = 0;
 815         }
 816
 817         if (err)
 818                 return err;
 819
 820         if (!td->o.zone_size)
 821                 td->o.zone_size = td->o.size;
 822
 823         /*
 824          * iolog already set the total io size, if we read back
 825          * stored entries.
 826          */
 827         if (!td->o.read_iolog_file)
 828                 td->total_io_size = td->o.size * td->o.loops;
 829
 830 done:
 831         if (td->o.create_only)
 832                 td->done = 1;
 833
 834         return 0;
 835 err_offset:
 836         log_err("%s: you need to specify valid offset=\n", td->o.name);
 837         return 1;
 838 }
 839
 840 int pre_read_files(struct thread_data *td)
 841 {
 842         struct fio_file *f;
 843         unsigned int i;
 844
 845         dprint(FD_FILE, "pre_read files\n");
 846
 847         for_each_file(td, f, i) {
 848                 pre_read_file(td, f);
 849         }
 850
 851         return 1;
 852 }
 853
 854 int init_random_map(struct thread_data *td)
 855 {
 856         unsigned long long blocks, num_maps;
 857         struct fio_file *f;
 858         unsigned int i;
 859
 860         if (td->o.norandommap || !td_random(td))
 861                 return 0;
 862
 863         for_each_file(td, f, i) {
 864                 blocks = (f->real_file_size + td->o.rw_min_bs - 1) /
 865                                 (unsigned long long) td->o.rw_min_bs;
 866                 num_maps = (blocks + BLOCKS_PER_MAP - 1) /
 867                                 (unsigned long long) BLOCKS_PER_MAP;
 868                 if (num_maps == (unsigned long) num_maps) {
 869                         f->file_map = smalloc(num_maps * sizeof(unsigned long));
 870                         if (f->file_map) {
 871                                 f->num_maps = num_maps;
 872                                 continue;
 873                         }
 874                 } else
 875                         f->file_map = NULL;
 876
 877                 if (!td->o.softrandommap) {
 878                         log_err("fio: failed allocating random map. If running"
 879                                 " a large number of jobs, try the 'norandommap'"
 880                                 " option or set 'softrandommap'. Or give"
 881                                 " a larger --alloc-size to fio.\n");
 882                         return 1;
 883                 }
 884
 885                 log_info("fio: file %s failed allocating random map. Running "
 886                          "job without.\n", f->file_name);
 887                 f->num_maps = 0;
 888         }
 889
 890         return 0;
 891 }
 892
 893 void close_files(struct thread_data *td)
 894 {
 895         struct fio_file *f;
 896         unsigned int i;
 897
 898         for_each_file(td, f, i) {
 899                 if (fio_file_open(f))
 900                         td_io_close_file(td, f);
 901         }
 902 }
 903
 904 void close_and_free_files(struct thread_data *td)
 905 {
 906         struct fio_file *f;
 907         unsigned int i;
 908
 909         dprint(FD_FILE, "close files\n");
 910
 911         for_each_file(td, f, i) {
 912                 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
 913                         dprint(FD_FILE, "free unlink %s\n", f->file_name);
 914                         unlink(f->file_name);
 915                 }
 916
 917                 if (fio_file_open(f))
 918                         td_io_close_file(td, f);
 919
 920                 remove_file_hash(f);
 921
 922                 sfree(f->file_name);
 923                 f->file_name = NULL;
 924                 sfree(f->file_map);
 925                 f->file_map = NULL;
 926                 sfree(f);
 927         }
 928
 929         td->o.filename = NULL;
 930         free(td->files);
 931         td->files_index = 0;
 932         td->files = NULL;
 933         td->o.nr_files = 0;
 934 }
 935
 936 static void get_file_type(struct fio_file *f)
 937 {
 938         struct stat sb;
 939
 940         if (!strcmp(f->file_name, "-"))
 941                 f->filetype = FIO_TYPE_PIPE;
 942         else
 943                 f->filetype = FIO_TYPE_FILE;
 944
 945         /* \\.\ is the device namespace in Windows, where every file is
 946          * a block device */
 947         if (strncmp(f->file_name, "\\\\.\\", 4) == 0)
 948                 f->filetype = FIO_TYPE_BD;
 949
 950         if (!stat(f->file_name, &sb)) {
 951                 if (S_ISBLK(sb.st_mode))
 952                         f->filetype = FIO_TYPE_BD;
 953                 else if (S_ISCHR(sb.st_mode))
 954                         f->filetype = FIO_TYPE_CHAR;
 955                 else if (S_ISFIFO(sb.st_mode))
 956                         f->filetype = FIO_TYPE_PIPE;
 957         }
 958 }
 959
 960 int add_file(struct thread_data *td, const char *fname)
 961 {
 962         int cur_files = td->files_index;
 963         char file_name[PATH_MAX];
 964         struct fio_file *f;
 965         int len = 0;
 966
 967         dprint(FD_FILE, "add file %s\n", fname);
 968
 969         f = smalloc(sizeof(*f));
 970         if (!f) {
 971                 log_err("fio: smalloc OOM\n");
 972                 assert(0);
 973         }
 974
 975         f->fd = -1;
 976         fio_file_reset(f);
 977
 978         if (td->files_size <= td->files_index) {
 979                 int new_size = td->o.nr_files + 1;
 980
 981                 dprint(FD_FILE, "resize file array to %d files\n", new_size);
 982
 983                 td->files = realloc(td->files, new_size * sizeof(f));
 984                 td->files_size = new_size;
 985         }
 986         td->files[cur_files] = f;
 987         f->fileno = cur_files;
 988
 989         /*
 990          * init function, io engine may not be loaded yet
 991          */
 992         if (td->io_ops && (td->io_ops->flags & FIO_DISKLESSIO))
 993                 f->real_file_size = -1ULL;
 994
 995         if (td->o.directory)
 996                 len = sprintf(file_name, "%s/", td->o.directory);
 997
 998         sprintf(file_name + len, "%s", fname);
 999         f->file_name = smalloc_strdup(file_name);
1000         if (!f->file_name) {
1001                 log_err("fio: smalloc OOM\n");
1002                 assert(0);
1003         }
1004
1005         get_file_type(f);
1006
1007         switch (td->o.file_lock_mode) {
1008         case FILE_LOCK_NONE:
1009                 break;
1010         case FILE_LOCK_READWRITE:
1011                 f->lock = fio_mutex_rw_init();
1012                 break;
1013         case FILE_LOCK_EXCLUSIVE:
1014                 f->lock = fio_mutex_init(FIO_MUTEX_UNLOCKED);
1015                 break;
1016         default:
1017                 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
1018                 assert(0);
1019         }
1020
1021         td->files_index++;
1022         if (f->filetype == FIO_TYPE_FILE)
1023                 td->nr_normal_files++;
1024
1025         dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name,
1026                                                         cur_files);
1027
1028         return cur_files;
1029 }
1030
1031 int add_file_exclusive(struct thread_data *td, const char *fname)
1032 {
1033         struct fio_file *f;
1034         unsigned int i;
1035
1036         for_each_file(td, f, i) {
1037                 if (!strcmp(f->file_name, fname))
1038                         return i;
1039         }
1040
1041         return add_file(td, fname);
1042 }
1043
1044 void get_file(struct fio_file *f)
1045 {
1046         dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
1047         assert(fio_file_open(f));
1048         f->references++;
1049 }
1050
1051 int put_file(struct thread_data *td, struct fio_file *f)
1052 {
1053         int f_ret = 0, ret = 0;
1054
1055         dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
1056
1057         if (!fio_file_open(f)) {
1058                 assert(f->fd == -1);
1059                 return 0;
1060         }
1061
1062         assert(f->references);
1063         if (--f->references)
1064                 return 0;
1065
1066         if (should_fsync(td) && td->o.fsync_on_close)
1067                 f_ret = fsync(f->fd);
1068
1069         if (td->io_ops->close_file)
1070                 ret = td->io_ops->close_file(td, f);
1071
1072         if (!ret)
1073                 ret = f_ret;
1074
1075         td->nr_open_files--;
1076         fio_file_clear_open(f);
1077         assert(f->fd == -1);
1078         return ret;
1079 }
1080
1081 void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
1082 {
1083         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1084                 return;
1085
1086         if (f->lock_owner == td && f->lock_batch--)
1087                 return;
1088
1089         if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
1090                 if (ddir == DDIR_READ)
1091                         fio_mutex_down_read(f->lock);
1092                 else
1093                         fio_mutex_down_write(f->lock);
1094         } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1095                 fio_mutex_down(f->lock);
1096
1097         f->lock_owner = td;
1098         f->lock_batch = td->o.lockfile_batch;
1099         f->lock_ddir = ddir;
1100 }
1101
1102 void unlock_file(struct thread_data *td, struct fio_file *f)
1103 {
1104         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1105                 return;
1106         if (f->lock_batch)
1107                 return;
1108
1109         if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
1110                 const int is_read = f->lock_ddir == DDIR_READ;
1111                 int val = fio_mutex_getval(f->lock);
1112
1113                 if ((is_read && val == 1) || (!is_read && val == -1))
1114                         f->lock_owner = NULL;
1115
1116                 if (is_read)
1117                         fio_mutex_up_read(f->lock);
1118                 else
1119                         fio_mutex_up_write(f->lock);
1120         } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE) {
1121                 int val = fio_mutex_getval(f->lock);
1122
1123                 if (val == 0)
1124                         f->lock_owner = NULL;
1125
1126                 fio_mutex_up(f->lock);
1127         }
1128 }
1129
1130 void unlock_file_all(struct thread_data *td, struct fio_file *f)
1131 {
1132         if (f->lock_owner != td)
1133                 return;
1134
1135         f->lock_batch = 0;
1136         unlock_file(td, f);
1137 }
1138
1139 static int recurse_dir(struct thread_data *td, const char *dirname)
1140 {
1141         struct dirent *dir;
1142         int ret = 0;
1143         DIR *D;
1144
1145         D = opendir(dirname);
1146         if (!D) {
1147                 char buf[FIO_VERROR_SIZE];
1148
1149                 snprintf(buf, FIO_VERROR_SIZE - 1, "opendir(%s)", dirname);
1150                 td_verror(td, errno, buf);
1151                 return 1;
1152         }
1153
1154         while ((dir = readdir(D)) != NULL) {
1155                 char full_path[PATH_MAX];
1156                 struct stat sb;
1157
1158                 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
1159                         continue;
1160
1161                 sprintf(full_path, "%s%s%s", dirname, FIO_OS_PATH_SEPARATOR, dir->d_name);
1162
1163                 if (lstat(full_path, &sb) == -1) {
1164                         if (errno != ENOENT) {
1165                                 td_verror(td, errno, "stat");
1166                                 return 1;
1167                         }
1168                 }
1169
1170                 if (S_ISREG(sb.st_mode)) {
1171                         add_file(td, full_path);
1172                         td->o.nr_files++;
1173                         continue;
1174                 }
1175                 if (!S_ISDIR(sb.st_mode))
1176                         continue;
1177
1178                 ret = recurse_dir(td, full_path);
1179                 if (ret)
1180                         break;
1181         }
1182
1183         closedir(D);
1184         return ret;
1185 }
1186
1187 int add_dir_files(struct thread_data *td, const char *path)
1188 {
1189         int ret = recurse_dir(td, path);
1190
1191         if (!ret)
1192                 log_info("fio: opendir added %d files\n", td->o.nr_files);
1193
1194         return ret;
1195 }
1196
1197 void dup_files(struct thread_data *td, struct thread_data *org)
1198 {
1199         struct fio_file *f;
1200         unsigned int i;
1201
1202         dprint(FD_FILE, "dup files: %d\n", org->files_index);
1203
1204         if (!org->files)
1205                 return;
1206
1207         td->files = malloc(org->files_index * sizeof(f));
1208
1209         for_each_file(org, f, i) {
1210                 struct fio_file *__f;
1211
1212                 __f = smalloc(sizeof(*__f));
1213                 if (!__f) {
1214                         log_err("fio: smalloc OOM\n");
1215                         assert(0);
1216                 }
1217                 __f->fd = -1;
1218                 fio_file_reset(__f);
1219
1220                 if (f->file_name) {
1221                         __f->file_name = smalloc_strdup(f->file_name);
1222                         if (!__f->file_name) {
1223                                 log_err("fio: smalloc OOM\n");
1224                                 assert(0);
1225                         }
1226
1227                         __f->filetype = f->filetype;
1228                 }
1229
1230                 td->files[i] = __f;
1231         }
1232 }
1233
1234 /*
1235  * Returns the index that matches the filename, or -1 if not there
1236  */
1237 int get_fileno(struct thread_data *td, const char *fname)
1238 {
1239         struct fio_file *f;
1240         unsigned int i;
1241
1242         for_each_file(td, f, i)
1243                 if (!strcmp(f->file_name, fname))
1244                         return i;
1245
1246         return -1;
1247 }
1248
1249 /*
1250  * For log usage, where we add/open/close files automatically
1251  */
1252 void free_release_files(struct thread_data *td)
1253 {
1254         close_files(td);
1255         td->files_index = 0;
1256         td->nr_normal_files = 0;
1257 }