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                 td_verror(td, __e, buf);
 530         }
 531
 532         if (!from_hash && f->fd != -1) {
 533                 if (add_file_hash(f)) {
 534                         int fio_unused ret;
 535
 536                         /*
 537                          * OK to ignore, we haven't done anything with it
 538                          */
 539                         ret = generic_close_file(td, f);
 540                         goto open_again;
 541                 }
 542         }
 543
 544         return 0;
 545 }
 546
 547 int generic_get_file_size(struct thread_data *td, struct fio_file *f)
 548 {
 549         return get_file_size(td, f);
 550 }
 551
 552 /*
 553  * open/close all files, so that ->real_file_size gets set
 554  */
 555 static int get_file_sizes(struct thread_data *td)
 556 {
 557         struct fio_file *f;
 558         unsigned int i;
 559         int err = 0;
 560
 561         for_each_file(td, f, i) {
 562                 dprint(FD_FILE, "get file size for %p/%d/%p\n", f, i,
 563                                                                 f->file_name);
 564
 565                 if (td_io_get_file_size(td, f)) {
 566                         if (td->error != ENOENT) {
 567                                 log_err("%s\n", td->verror);
 568                                 err = 1;
 569                         }
 570                         clear_error(td);
 571                 }
 572
 573                 if (f->real_file_size == -1ULL && td->o.size)
 574                         f->real_file_size = td->o.size / td->o.nr_files;
 575         }
 576
 577         return err;
 578 }
 579
 580 struct fio_mount {
 581         struct flist_head list;
 582         const char *base;
 583         char __base[256];
 584         unsigned int key;
 585 };
 586
 587 /*
 588  * Get free number of bytes for each file on each unique mount.
 589  */
 590 static unsigned long long get_fs_free_counts(struct thread_data *td)
 591 {
 592         struct flist_head *n, *tmp;
 593         unsigned long long ret = 0;
 594         struct fio_mount *fm;
 595         FLIST_HEAD(list);
 596         struct fio_file *f;
 597         unsigned int i;
 598
 599         for_each_file(td, f, i) {
 600                 struct stat sb;
 601                 char buf[256];
 602
 603                 if (f->filetype == FIO_TYPE_BD || f->filetype == FIO_TYPE_CHAR) {
 604                         if (f->real_file_size != -1ULL)
 605                                 ret += f->real_file_size;
 606                         continue;
 607                 } else if (f->filetype != FIO_TYPE_FILE)
 608                         continue;
 609
 610                 strcpy(buf, f->file_name);
 611
 612                 if (stat(buf, &sb) < 0) {
 613                         if (errno != ENOENT)
 614                                 break;
 615                         strcpy(buf, ".");
 616                         if (stat(buf, &sb) < 0)
 617                                 break;
 618                 }
 619
 620                 fm = NULL;
 621                 flist_for_each(n, &list) {
 622                         fm = flist_entry(n, struct fio_mount, list);
 623                         if (fm->key == sb.st_dev)
 624                                 break;
 625
 626                         fm = NULL;
 627                 }
 628
 629                 if (fm)
 630                         continue;
 631
 632                 fm = malloc(sizeof(*fm));
 633                 strcpy(fm->__base, buf);
 634                 fm->base = basename(fm->__base);
 635                 fm->key = sb.st_dev;
 636                 flist_add(&fm->list, &list);
 637         }
 638
 639         flist_for_each_safe(n, tmp, &list) {
 640                 unsigned long long sz;
 641
 642                 fm = flist_entry(n, struct fio_mount, list);
 643                 flist_del(&fm->list);
 644
 645                 sz = get_fs_size(fm->base);
 646                 if (sz && sz != -1ULL)
 647                         ret += sz;
 648
 649                 free(fm);
 650         }
 651
 652         return ret;
 653 }
 654
 655 /*
 656  * Open the files and setup files sizes, creating files if necessary.
 657  */
 658 int setup_files(struct thread_data *td)
 659 {
 660         unsigned long long total_size, extend_size;
 661         struct fio_file *f;
 662         unsigned int i;
 663         int err = 0, need_extend;
 664
 665         dprint(FD_FILE, "setup files\n");
 666
 667         if (td->o.read_iolog_file)
 668                 return 0;
 669
 670         /*
 671          * if ioengine defines a setup() method, it's responsible for
 672          * opening the files and setting f->real_file_size to indicate
 673          * the valid range for that file.
 674          */
 675         if (td->io_ops->setup)
 676                 err = td->io_ops->setup(td);
 677         else
 678                 err = get_file_sizes(td);
 679
 680         if (err)
 681                 return err;
 682
 683         /*
 684          * check sizes. if the files/devices do not exist and the size
 685          * isn't passed to fio, abort.
 686          */
 687         total_size = 0;
 688         for_each_file(td, f, i) {
 689                 if (f->real_file_size == -1ULL)
 690                         total_size = -1ULL;
 691                 else
 692                         total_size += f->real_file_size;
 693         }
 694
 695         if (td->o.fill_device)
 696                 td->fill_device_size = get_fs_free_counts(td);
 697
 698         /*
 699          * device/file sizes are zero and no size given, punt
 700          */
 701         if ((!total_size || total_size == -1ULL) && !td->o.size &&
 702             !(td->io_ops->flags & FIO_NOIO) && !td->o.fill_device) {
 703                 log_err("%s: you need to specify size=\n", td->o.name);
 704                 td_verror(td, EINVAL, "total_file_size");
 705                 return 1;
 706         }
 707
 708         /*
 709          * now file sizes are known, so we can set ->io_size. if size= is
 710          * not given, ->io_size is just equal to ->real_file_size. if size
 711          * is given, ->io_size is size / nr_files.
 712          */
 713         extend_size = total_size = 0;
 714         need_extend = 0;
 715         for_each_file(td, f, i) {
 716                 f->file_offset = td->o.start_offset;
 717
 718                 if (!td->o.file_size_low) {
 719                         /*
 720                          * no file size range given, file size is equal to
 721                          * total size divided by number of files. if that is
 722                          * zero, set it to the real file size.
 723                          */
 724                         f->io_size = td->o.size / td->o.nr_files;
 725                         if (!f->io_size)
 726                                 f->io_size = f->real_file_size - f->file_offset;
 727                 } else if (f->real_file_size < td->o.file_size_low ||
 728                            f->real_file_size > td->o.file_size_high) {
 729                         if (f->file_offset > td->o.file_size_low)
 730                                 goto err_offset;
 731                         /*
 732                          * file size given. if it's fixed, use that. if it's a
 733                          * range, generate a random size in-between.
 734                          */
 735                         if (td->o.file_size_low == td->o.file_size_high) {
 736                                 f->io_size = td->o.file_size_low
 737                                                 - f->file_offset;
 738                         } else {
 739                                 f->io_size = get_rand_file_size(td)
 740                                                 - f->file_offset;
 741                         }
 742                 } else
 743                         f->io_size = f->real_file_size - f->file_offset;
 744
 745                 if (f->io_size == -1ULL)
 746                         total_size = -1ULL;
 747                 else
 748                         total_size += f->io_size;
 749
 750                 if (f->filetype == FIO_TYPE_FILE &&
 751                     (f->io_size + f->file_offset) > f->real_file_size &&
 752                     !(td->io_ops->flags & FIO_DISKLESSIO)) {
 753                         if (!td->o.create_on_open) {
 754                                 need_extend++;
 755                                 extend_size += (f->io_size + f->file_offset);
 756                         } else
 757                                 f->real_file_size = f->io_size + f->file_offset;
 758                         fio_file_set_extend(f);
 759                 }
 760         }
 761
 762         if (td->o.size_percent)
 763                 total_size = (total_size * td->o.size_percent) / 100;
 764
 765         if (!td->o.size || td->o.size > total_size)
 766                 td->o.size = total_size;
 767
 768         /*
 769          * See if we need to extend some files
 770          */
 771         if (need_extend) {
 772                 temp_stall_ts = 1;
 773                 if (!terse_output)
 774                         log_info("%s: Laying out IO file(s) (%u file(s) /"
 775                                  " %lluMB)\n", td->o.name, need_extend,
 776                                         extend_size >> 20);
 777
 778                 for_each_file(td, f, i) {
 779                         unsigned long long old_len = -1ULL, extend_len = -1ULL;
 780
 781                         if (!fio_file_extend(f))
 782                                 continue;
 783
 784                         assert(f->filetype == FIO_TYPE_FILE);
 785                         fio_file_clear_extend(f);
 786                         if (!td->o.fill_device) {
 787                                 old_len = f->real_file_size;
 788                                 extend_len = f->io_size + f->file_offset -
 789                                                 old_len;
 790                         }
 791                         f->real_file_size = (f->io_size + f->file_offset);
 792                         err = extend_file(td, f);
 793                         if (err)
 794                                 break;
 795
 796                         err = __file_invalidate_cache(td, f, old_len,
 797                                                                 extend_len);
 798                         close(f->fd);
 799                         f->fd = -1;
 800                         if (err)
 801                                 break;
 802                 }
 803                 temp_stall_ts = 0;
 804         }
 805
 806         if (err)
 807                 return err;
 808
 809         if (!td->o.zone_size)
 810                 td->o.zone_size = td->o.size;
 811
 812         /*
 813          * iolog already set the total io size, if we read back
 814          * stored entries.
 815          */
 816         if (!td->o.read_iolog_file)
 817                 td->total_io_size = td->o.size * td->o.loops;
 818         return 0;
 819 err_offset:
 820         log_err("%s: you need to specify valid offset=\n", td->o.name);
 821         return 1;
 822 }
 823
 824 int pre_read_files(struct thread_data *td)
 825 {
 826         struct fio_file *f;
 827         unsigned int i;
 828
 829         dprint(FD_FILE, "pre_read files\n");
 830
 831         for_each_file(td, f, i) {
 832                 pre_read_file(td, f);
 833         }
 834
 835         return 1;
 836 }
 837
 838 int init_random_map(struct thread_data *td)
 839 {
 840         unsigned long long blocks, num_maps;
 841         struct fio_file *f;
 842         unsigned int i;
 843
 844         if (td->o.norandommap || !td_random(td))
 845                 return 0;
 846
 847         for_each_file(td, f, i) {
 848                 blocks = (f->real_file_size + td->o.rw_min_bs - 1) /
 849                                 (unsigned long long) td->o.rw_min_bs;
 850                 num_maps = (blocks + BLOCKS_PER_MAP - 1) /
 851                                 (unsigned long long) BLOCKS_PER_MAP;
 852                 if (num_maps == (unsigned long) num_maps) {
 853                         f->file_map = smalloc(num_maps * sizeof(unsigned long));
 854                         if (f->file_map) {
 855                                 f->num_maps = num_maps;
 856                                 continue;
 857                         }
 858                 } else
 859                         f->file_map = NULL;
 860
 861                 if (!td->o.softrandommap) {
 862                         log_err("fio: failed allocating random map. If running"
 863                                 " a large number of jobs, try the 'norandommap'"
 864                                 " option or set 'softrandommap'. Or give"
 865                                 " a larger --alloc-size to fio.\n");
 866                         return 1;
 867                 }
 868
 869                 log_info("fio: file %s failed allocating random map. Running "
 870                          "job without.\n", f->file_name);
 871                 f->num_maps = 0;
 872         }
 873
 874         return 0;
 875 }
 876
 877 void close_files(struct thread_data *td)
 878 {
 879         struct fio_file *f;
 880         unsigned int i;
 881
 882         for_each_file(td, f, i) {
 883                 if (fio_file_open(f))
 884                         td_io_close_file(td, f);
 885         }
 886 }
 887
 888 void close_and_free_files(struct thread_data *td)
 889 {
 890         struct fio_file *f;
 891         unsigned int i;
 892
 893         dprint(FD_FILE, "close files\n");
 894
 895         for_each_file(td, f, i) {
 896                 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
 897                         dprint(FD_FILE, "free unlink %s\n", f->file_name);
 898                         unlink(f->file_name);
 899                 }
 900
 901                 if (fio_file_open(f))
 902                         td_io_close_file(td, f);
 903
 904                 remove_file_hash(f);
 905
 906                 sfree(f->file_name);
 907                 f->file_name = NULL;
 908                 sfree(f->file_map);
 909                 f->file_map = NULL;
 910                 sfree(f);
 911         }
 912
 913         td->o.filename = NULL;
 914         free(td->files);
 915         td->files_index = 0;
 916         td->files = NULL;
 917         td->o.nr_files = 0;
 918 }
 919
 920 static void get_file_type(struct fio_file *f)
 921 {
 922         struct stat sb;
 923
 924         if (!strcmp(f->file_name, "-"))
 925                 f->filetype = FIO_TYPE_PIPE;
 926         else
 927                 f->filetype = FIO_TYPE_FILE;
 928
 929         /* \\.\ is the device namespace in Windows, where every file is
 930          * a block device */
 931         if (strncmp(f->file_name, "\\\\.\\", 4) == 0)
 932                 f->filetype = FIO_TYPE_BD;
 933
 934         if (!stat(f->file_name, &sb)) {
 935                 if (S_ISBLK(sb.st_mode))
 936                         f->filetype = FIO_TYPE_BD;
 937                 else if (S_ISCHR(sb.st_mode))
 938                         f->filetype = FIO_TYPE_CHAR;
 939                 else if (S_ISFIFO(sb.st_mode))
 940                         f->filetype = FIO_TYPE_PIPE;
 941         }
 942 }
 943
 944 int add_file(struct thread_data *td, const char *fname)
 945 {
 946         int cur_files = td->files_index;
 947         char file_name[PATH_MAX];
 948         struct fio_file *f;
 949         int len = 0;
 950
 951         dprint(FD_FILE, "add file %s\n", fname);
 952
 953         f = smalloc(sizeof(*f));
 954         if (!f) {
 955                 log_err("fio: smalloc OOM\n");
 956                 assert(0);
 957         }
 958
 959         f->fd = -1;
 960         fio_file_reset(f);
 961
 962         if (td->files_size <= td->files_index) {
 963                 int new_size = td->o.nr_files + 1;
 964
 965                 dprint(FD_FILE, "resize file array to %d files\n", new_size);
 966
 967                 td->files = realloc(td->files, new_size * sizeof(f));
 968                 td->files_size = new_size;
 969         }
 970         td->files[cur_files] = f;
 971
 972         /*
 973          * init function, io engine may not be loaded yet
 974          */
 975         if (td->io_ops && (td->io_ops->flags & FIO_DISKLESSIO))
 976                 f->real_file_size = -1ULL;
 977
 978         if (td->o.directory)
 979                 len = sprintf(file_name, "%s/", td->o.directory);
 980
 981         sprintf(file_name + len, "%s", fname);
 982         f->file_name = smalloc_strdup(file_name);
 983         if (!f->file_name) {
 984                 log_err("fio: smalloc OOM\n");
 985                 assert(0);
 986         }
 987
 988         get_file_type(f);
 989
 990         switch (td->o.file_lock_mode) {
 991         case FILE_LOCK_NONE:
 992                 break;
 993         case FILE_LOCK_READWRITE:
 994                 f->lock = fio_mutex_rw_init();
 995                 break;
 996         case FILE_LOCK_EXCLUSIVE:
 997                 f->lock = fio_mutex_init(1);
 998                 break;
 999         default:
1000                 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
1001                 assert(0);
1002         }
1003
1004         td->files_index++;
1005         if (f->filetype == FIO_TYPE_FILE)
1006                 td->nr_normal_files++;
1007
1008         dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name,
1009                                                         cur_files);
1010
1011         return cur_files;
1012 }
1013
1014 int add_file_exclusive(struct thread_data *td, const char *fname)
1015 {
1016         struct fio_file *f;
1017         unsigned int i;
1018
1019         for_each_file(td, f, i) {
1020                 if (!strcmp(f->file_name, fname))
1021                         return i;
1022         }
1023
1024         return add_file(td, fname);
1025 }
1026
1027 void get_file(struct fio_file *f)
1028 {
1029         dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
1030         assert(fio_file_open(f));
1031         f->references++;
1032 }
1033
1034 int put_file(struct thread_data *td, struct fio_file *f)
1035 {
1036         int f_ret = 0, ret = 0;
1037
1038         dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
1039
1040         if (!fio_file_open(f)) {
1041                 assert(f->fd == -1);
1042                 return 0;
1043         }
1044
1045         assert(f->references);
1046         if (--f->references)
1047                 return 0;
1048
1049         if (should_fsync(td) && td->o.fsync_on_close)
1050                 f_ret = fsync(f->fd);
1051
1052         if (td->io_ops->close_file)
1053                 ret = td->io_ops->close_file(td, f);
1054
1055         if (!ret)
1056                 ret = f_ret;
1057
1058         td->nr_open_files--;
1059         fio_file_clear_open(f);
1060         assert(f->fd == -1);
1061         return ret;
1062 }
1063
1064 void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
1065 {
1066         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1067                 return;
1068
1069         if (f->lock_owner == td && f->lock_batch--)
1070                 return;
1071
1072         if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
1073                 if (ddir == DDIR_READ)
1074                         fio_mutex_down_read(f->lock);
1075                 else
1076                         fio_mutex_down_write(f->lock);
1077         } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1078                 fio_mutex_down(f->lock);
1079
1080         f->lock_owner = td;
1081         f->lock_batch = td->o.lockfile_batch;
1082         f->lock_ddir = ddir;
1083 }
1084
1085 void unlock_file(struct thread_data *td, struct fio_file *f)
1086 {
1087         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1088                 return;
1089         if (f->lock_batch)
1090                 return;
1091
1092         if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
1093                 const int is_read = f->lock_ddir == DDIR_READ;
1094                 int val = fio_mutex_getval(f->lock);
1095
1096                 if ((is_read && val == 1) || (!is_read && val == -1))
1097                         f->lock_owner = NULL;
1098
1099                 if (is_read)
1100                         fio_mutex_up_read(f->lock);
1101                 else
1102                         fio_mutex_up_write(f->lock);
1103         } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE) {
1104                 int val = fio_mutex_getval(f->lock);
1105
1106                 if (val == 0)
1107                         f->lock_owner = NULL;
1108
1109                 fio_mutex_up(f->lock);
1110         }
1111 }
1112
1113 void unlock_file_all(struct thread_data *td, struct fio_file *f)
1114 {
1115         if (f->lock_owner != td)
1116                 return;
1117
1118         f->lock_batch = 0;
1119         unlock_file(td, f);
1120 }
1121
1122 static int recurse_dir(struct thread_data *td, const char *dirname)
1123 {
1124         struct dirent *dir;
1125         int ret = 0;
1126         DIR *D;
1127
1128         D = opendir(dirname);
1129         if (!D) {
1130                 char buf[FIO_VERROR_SIZE];
1131
1132                 snprintf(buf, FIO_VERROR_SIZE - 1, "opendir(%s)", dirname);
1133                 td_verror(td, errno, buf);
1134                 return 1;
1135         }
1136
1137         while ((dir = readdir(D)) != NULL) {
1138                 char full_path[PATH_MAX];
1139                 struct stat sb;
1140
1141                 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
1142                         continue;
1143
1144                 sprintf(full_path, "%s%s%s", dirname, FIO_OS_PATH_SEPARATOR, dir->d_name);
1145
1146                 if (lstat(full_path, &sb) == -1) {
1147                         if (errno != ENOENT) {
1148                                 td_verror(td, errno, "stat");
1149                                 return 1;
1150                         }
1151                 }
1152
1153                 if (S_ISREG(sb.st_mode)) {
1154                         add_file(td, full_path);
1155                         td->o.nr_files++;
1156                         continue;
1157                 }
1158                 if (!S_ISDIR(sb.st_mode))
1159                         continue;
1160
1161                 ret = recurse_dir(td, full_path);
1162                 if (ret)
1163                         break;
1164         }
1165
1166         closedir(D);
1167         return ret;
1168 }
1169
1170 int add_dir_files(struct thread_data *td, const char *path)
1171 {
1172         int ret = recurse_dir(td, path);
1173
1174         if (!ret)
1175                 log_info("fio: opendir added %d files\n", td->o.nr_files);
1176
1177         return ret;
1178 }
1179
1180 void dup_files(struct thread_data *td, struct thread_data *org)
1181 {
1182         struct fio_file *f;
1183         unsigned int i;
1184
1185         dprint(FD_FILE, "dup files: %d\n", org->files_index);
1186
1187         if (!org->files)
1188                 return;
1189
1190         td->files = malloc(org->files_index * sizeof(f));
1191
1192         for_each_file(org, f, i) {
1193                 struct fio_file *__f;
1194
1195                 __f = smalloc(sizeof(*__f));
1196                 if (!__f) {
1197                         log_err("fio: smalloc OOM\n");
1198                         assert(0);
1199                 }
1200                 __f->fd = -1;
1201                 fio_file_reset(__f);
1202
1203                 if (f->file_name) {
1204                         __f->file_name = smalloc_strdup(f->file_name);
1205                         if (!__f->file_name) {
1206                                 log_err("fio: smalloc OOM\n");
1207                                 assert(0);
1208                         }
1209
1210                         __f->filetype = f->filetype;
1211                 }
1212
1213                 td->files[i] = __f;
1214         }
1215 }
1216
1217 /*
1218  * Returns the index that matches the filename, or -1 if not there
1219  */
1220 int get_fileno(struct thread_data *td, const char *fname)
1221 {
1222         struct fio_file *f;
1223         unsigned int i;
1224
1225         for_each_file(td, f, i)
1226                 if (!strcmp(f->file_name, fname))
1227                         return i;
1228
1229         return -1;
1230 }
1231
1232 /*
1233  * For log usage, where we add/open/close files automatically
1234  */
1235 void free_release_files(struct thread_data *td)
1236 {
1237         close_files(td);
1238         td->files_index = 0;
1239         td->nr_normal_files = 0;
1240 }