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 "options.h"
  15 #include "os/os.h"
  16 #include "hash.h"
  17 #include "lib/axmap.h"
  18
  19 #ifdef CONFIG_LINUX_FALLOCATE
  20 #include <linux/falloc.h>
  21 #endif
  22
  23 static int root_warn;
  24
  25 static FLIST_HEAD(filename_list);
  26
  27 /*
  28  * List entry for filename_list
  29  */
  30 struct file_name {
  31         struct flist_head list;
  32         char *filename;
  33 };
  34
  35 static inline void clear_error(struct thread_data *td)
  36 {
  37         td->error = 0;
  38         td->verror[0] = '\0';
  39 }
  40
  41 static inline int native_fallocate(struct thread_data *td, struct fio_file *f)
  42 {
  43         bool success;
  44
  45         success = fio_fallocate(f, 0, f->real_file_size);
  46         dprint(FD_FILE, "native fallocate of file %s size %llu was "
  47                         "%ssuccessful\n", f->file_name,
  48                         (unsigned long long) f->real_file_size,
  49                         !success ? "un": "");
  50
  51         if (success)
  52                 return 0;
  53
  54         if (errno == ENOSYS)
  55                 dprint(FD_FILE, "native fallocate is not implemented\n");
  56
  57         return -1;
  58 }
  59
  60 static void fallocate_file(struct thread_data *td, struct fio_file *f)
  61 {
  62         int r;
  63
  64         if (td->o.fill_device)
  65                 return;
  66
  67         switch (td->o.fallocate_mode) {
  68         case FIO_FALLOCATE_NATIVE:
  69                 r = native_fallocate(td, f);
  70                 if (r != 0 && errno != ENOSYS)
  71                         log_err("fio: native_fallocate call failed: %s\n",
  72                                         strerror(errno));
  73                 break;
  74         case FIO_FALLOCATE_NONE:
  75                 break;
  76 #ifdef CONFIG_POSIX_FALLOCATE
  77         case FIO_FALLOCATE_POSIX:
  78                 dprint(FD_FILE, "posix_fallocate file %s size %llu\n",
  79                                  f->file_name,
  80                                  (unsigned long long) 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", strerror(r));
  85                 break;
  86 #endif /* CONFIG_POSIX_FALLOCATE */
  87 #ifdef CONFIG_LINUX_FALLOCATE
  88         case FIO_FALLOCATE_KEEP_SIZE:
  89                 dprint(FD_FILE, "fallocate(FALLOC_FL_KEEP_SIZE) "
  90                                 "file %s size %llu\n", f->file_name,
  91                                 (unsigned long long) f->real_file_size);
  92
  93                 r = fallocate(f->fd, FALLOC_FL_KEEP_SIZE, 0, f->real_file_size);
  94                 if (r != 0)
  95                         td_verror(td, errno, "fallocate");
  96
  97                 break;
  98 #endif /* CONFIG_LINUX_FALLOCATE */
  99         default:
 100                 log_err("fio: unknown fallocate mode: %d\n", td->o.fallocate_mode);
 101                 assert(0);
 102         }
 103 }
 104
 105 /*
 106  * Leaves f->fd open on success, caller must close
 107  */
 108 static int extend_file(struct thread_data *td, struct fio_file *f)
 109 {
 110         int new_layout = 0, unlink_file = 0, flags;
 111         unsigned long long left;
 112         unsigned int bs;
 113         char *b = NULL;
 114
 115         if (read_only) {
 116                 log_err("fio: refusing extend of file due to read-only\n");
 117                 return 0;
 118         }
 119
 120         /*
 121          * check if we need to lay the file out complete again. fio
 122          * does that for operations involving reads, or for writes
 123          * where overwrite is set
 124          */
 125         if (td_read(td) ||
 126            (td_write(td) && td->o.overwrite && !td->o.file_append) ||
 127             (td_write(td) && td_ioengine_flagged(td, FIO_NOEXTEND)))
 128                 new_layout = 1;
 129         if (td_write(td) && !td->o.overwrite && !td->o.file_append)
 130                 unlink_file = 1;
 131
 132         if (unlink_file || new_layout) {
 133                 int ret;
 134
 135                 dprint(FD_FILE, "layout unlink %s\n", f->file_name);
 136
 137                 ret = td_io_unlink_file(td, f);
 138                 if (ret != 0 && ret != ENOENT) {
 139                         td_verror(td, errno, "unlink");
 140                         return 1;
 141                 }
 142         }
 143
 144         flags = O_WRONLY;
 145         if (td->o.allow_create)
 146                 flags |= O_CREAT;
 147         if (new_layout)
 148                 flags |= O_TRUNC;
 149         if (td->o.odirect)
 150                 flags |= OS_O_DIRECT;
 151
 152 #ifdef WIN32
 153         flags |= _O_BINARY;
 154 #endif
 155
 156         dprint(FD_FILE, "open file %s, flags %x\n", f->file_name, flags);
 157         f->fd = open(f->file_name, flags, 0644);
 158         if (f->fd < 0) {
 159                 int err = errno;
 160
 161                 if (err == ENOENT && !td->o.allow_create)
 162                         log_err("fio: file creation disallowed by "
 163                                         "allow_file_create=0\n");
 164                 else
 165                         td_verror(td, err, "open");
 166                 return 1;
 167         }
 168
 169         fallocate_file(td, f);
 170
 171         /*
 172          * If our jobs don't require regular files initially, we're done.
 173          */
 174         if (!new_layout)
 175                 goto done;
 176
 177         /*
 178          * The size will be -1ULL when fill_device is used, so don't truncate
 179          * or fallocate this file, just write it
 180          */
 181         if (!td->o.fill_device) {
 182                 dprint(FD_FILE, "truncate file %s, size %llu\n", f->file_name,
 183                                         (unsigned long long) f->real_file_size);
 184                 if (ftruncate(f->fd, f->real_file_size) == -1) {
 185                         if (errno != EFBIG) {
 186                                 td_verror(td, errno, "ftruncate");
 187                                 goto err;
 188                         }
 189                 }
 190         }
 191
 192         left = f->real_file_size;
 193         bs = td->o.max_bs[DDIR_WRITE];
 194         if (bs > left)
 195                 bs = left;
 196
 197         b = malloc(bs);
 198         if (!b) {
 199                 td_verror(td, errno, "malloc");
 200                 goto err;
 201         }
 202
 203         while (left && !td->terminate) {
 204                 ssize_t r;
 205
 206                 if (bs > left)
 207                         bs = left;
 208
 209                 fill_io_buffer(td, b, bs, bs);
 210
 211                 r = write(f->fd, b, bs);
 212
 213                 if (r > 0) {
 214                         left -= r;
 215                         continue;
 216                 } else {
 217                         if (r < 0) {
 218                                 int __e = errno;
 219
 220                                 if (__e == ENOSPC) {
 221                                         if (td->o.fill_device)
 222                                                 break;
 223                                         log_info("fio: ENOSPC on laying out "
 224                                                  "file, stopping\n");
 225                                         break;
 226                                 }
 227                                 td_verror(td, errno, "write");
 228                         } else
 229                                 td_verror(td, EIO, "write");
 230
 231                         break;
 232                 }
 233         }
 234
 235         if (td->terminate) {
 236                 dprint(FD_FILE, "terminate unlink %s\n", f->file_name);
 237                 td_io_unlink_file(td, f);
 238         } else if (td->o.create_fsync) {
 239                 if (fsync(f->fd) < 0) {
 240                         td_verror(td, errno, "fsync");
 241                         goto err;
 242                 }
 243         }
 244         if (td->o.fill_device && !td_write(td)) {
 245                 fio_file_clear_size_known(f);
 246                 if (td_io_get_file_size(td, f))
 247                         goto err;
 248                 if (f->io_size > f->real_file_size)
 249                         f->io_size = f->real_file_size;
 250         }
 251
 252         free(b);
 253 done:
 254         return 0;
 255 err:
 256         close(f->fd);
 257         f->fd = -1;
 258         if (b)
 259                 free(b);
 260         return 1;
 261 }
 262
 263 static int pre_read_file(struct thread_data *td, struct fio_file *f)
 264 {
 265         int ret = 0, r, did_open = 0, old_runstate;
 266         unsigned long long left;
 267         unsigned int bs;
 268         char *b;
 269
 270         if (td_ioengine_flagged(td, FIO_PIPEIO) ||
 271             td_ioengine_flagged(td, FIO_NOIO))
 272                 return 0;
 273
 274         if (f->filetype == FIO_TYPE_CHAR)
 275                 return 0;
 276
 277         if (!fio_file_open(f)) {
 278                 if (td->io_ops->open_file(td, f)) {
 279                         log_err("fio: cannot pre-read, failed to open file\n");
 280                         return 1;
 281                 }
 282                 did_open = 1;
 283         }
 284
 285         old_runstate = td_bump_runstate(td, TD_PRE_READING);
 286
 287         left = f->io_size;
 288         bs = td->o.max_bs[DDIR_READ];
 289         if (bs > left)
 290                 bs = left;
 291
 292         b = malloc(bs);
 293         if (!b) {
 294                 td_verror(td, errno, "malloc");
 295                 ret = 1;
 296                 goto error;
 297         }
 298         memset(b, 0, bs);
 299
 300         if (lseek(f->fd, f->file_offset, SEEK_SET) < 0) {
 301                 td_verror(td, errno, "lseek");
 302                 log_err("fio: failed to lseek pre-read file\n");
 303                 ret = 1;
 304                 goto error;
 305         }
 306
 307         while (left && !td->terminate) {
 308                 if (bs > left)
 309                         bs = left;
 310
 311                 r = read(f->fd, b, bs);
 312
 313                 if (r == (int) bs) {
 314                         left -= bs;
 315                         continue;
 316                 } else {
 317                         td_verror(td, EIO, "pre_read");
 318                         break;
 319                 }
 320         }
 321
 322 error:
 323         td_restore_runstate(td, old_runstate);
 324
 325         if (did_open)
 326                 td->io_ops->close_file(td, f);
 327
 328         free(b);
 329         return ret;
 330 }
 331
 332 unsigned long long get_rand_file_size(struct thread_data *td)
 333 {
 334         unsigned long long ret, sized;
 335         uint64_t frand_max;
 336         unsigned long r;
 337
 338         frand_max = rand_max(&td->file_size_state);
 339         r = __rand(&td->file_size_state);
 340         sized = td->o.file_size_high - td->o.file_size_low;
 341         ret = (unsigned long long) ((double) sized * (r / (frand_max + 1.0)));
 342         ret += td->o.file_size_low;
 343         ret -= (ret % td->o.rw_min_bs);
 344         return ret;
 345 }
 346
 347 static int file_size(struct thread_data *td, struct fio_file *f)
 348 {
 349         struct stat st;
 350
 351         if (stat(f->file_name, &st) == -1) {
 352                 td_verror(td, errno, "fstat");
 353                 return 1;
 354         }
 355
 356         f->real_file_size = st.st_size;
 357         return 0;
 358 }
 359
 360 static int bdev_size(struct thread_data *td, struct fio_file *f)
 361 {
 362         unsigned long long bytes = 0;
 363         int r;
 364
 365         if (td->io_ops->open_file(td, f)) {
 366                 log_err("fio: failed opening blockdev %s for size check\n",
 367                         f->file_name);
 368                 return 1;
 369         }
 370
 371         r = blockdev_size(f, &bytes);
 372         if (r) {
 373                 td_verror(td, r, "blockdev_size");
 374                 goto err;
 375         }
 376
 377         if (!bytes) {
 378                 log_err("%s: zero sized block device?\n", f->file_name);
 379                 goto err;
 380         }
 381
 382         f->real_file_size = bytes;
 383         td->io_ops->close_file(td, f);
 384         return 0;
 385 err:
 386         td->io_ops->close_file(td, f);
 387         return 1;
 388 }
 389
 390 static int char_size(struct thread_data *td, struct fio_file *f)
 391 {
 392 #ifdef FIO_HAVE_CHARDEV_SIZE
 393         unsigned long long bytes = 0;
 394         int r;
 395
 396         if (td->io_ops->open_file(td, f)) {
 397                 log_err("fio: failed opening chardev %s for size check\n",
 398                         f->file_name);
 399                 return 1;
 400         }
 401
 402         r = chardev_size(f, &bytes);
 403         if (r) {
 404                 td_verror(td, r, "chardev_size");
 405                 goto err;
 406         }
 407
 408         if (!bytes) {
 409                 log_err("%s: zero sized char device?\n", f->file_name);
 410                 goto err;
 411         }
 412
 413         f->real_file_size = bytes;
 414         td->io_ops->close_file(td, f);
 415         return 0;
 416 err:
 417         td->io_ops->close_file(td, f);
 418         return 1;
 419 #else
 420         f->real_file_size = -1ULL;
 421         return 0;
 422 #endif
 423 }
 424
 425 static int get_file_size(struct thread_data *td, struct fio_file *f)
 426 {
 427         int ret = 0;
 428
 429         if (fio_file_size_known(f))
 430                 return 0;
 431
 432         if (f->filetype == FIO_TYPE_FILE)
 433                 ret = file_size(td, f);
 434         else if (f->filetype == FIO_TYPE_BLOCK)
 435                 ret = bdev_size(td, f);
 436         else if (f->filetype == FIO_TYPE_CHAR)
 437                 ret = char_size(td, f);
 438         else
 439                 f->real_file_size = -1ULL;
 440
 441         /*
 442          * Leave ->real_file_size with 0 since it could be expectation
 443          * of initial setup for regular files.
 444          */
 445         if (ret)
 446                 return ret;
 447
 448         /*
 449          * If ->real_file_size is -1, a conditional for the message
 450          * "offset extends end" is always true, but it makes no sense,
 451          * so just return the same value here.
 452          */
 453         if (f->real_file_size == -1ULL) {
 454                 log_info("%s: failed to get file size of %s\n", td->o.name,
 455                                         f->file_name);
 456                 return 1;
 457         }
 458
 459         if (td->o.start_offset && f->file_offset == 0)
 460                 dprint(FD_FILE, "offset of file %s not initialized yet\n",
 461                                         f->file_name);
 462         /*
 463          * ->file_offset normally hasn't been initialized yet, so this
 464          * is basically always false.
 465          */
 466         if (f->file_offset > f->real_file_size) {
 467                 log_err("%s: offset extends end (%llu > %llu)\n", td->o.name,
 468                                         (unsigned long long) f->file_offset,
 469                                         (unsigned long long) f->real_file_size);
 470                 return 1;
 471         }
 472
 473         fio_file_set_size_known(f);
 474         return 0;
 475 }
 476
 477 static int __file_invalidate_cache(struct thread_data *td, struct fio_file *f,
 478                                    unsigned long long off,
 479                                    unsigned long long len)
 480 {
 481         int errval = 0, ret = 0;
 482
 483 #ifdef CONFIG_ESX
 484         return 0;
 485 #endif
 486
 487         if (len == -1ULL)
 488                 len = f->io_size;
 489         if (off == -1ULL)
 490                 off = f->file_offset;
 491
 492         if (len == -1ULL || off == -1ULL)
 493                 return 0;
 494
 495         if (td->io_ops->invalidate) {
 496                 dprint(FD_IO, "invalidate %s cache %s\n", td->io_ops->name,
 497                         f->file_name);
 498                 ret = td->io_ops->invalidate(td, f);
 499                 if (ret < 0)
 500                         errval = -ret;
 501         } else if (f->filetype == FIO_TYPE_FILE) {
 502                 dprint(FD_IO, "declare unneeded cache %s: %llu/%llu\n",
 503                         f->file_name, off, len);
 504                 ret = posix_fadvise(f->fd, off, len, POSIX_FADV_DONTNEED);
 505                 if (ret)
 506                         errval = ret;
 507         } else if (f->filetype == FIO_TYPE_BLOCK) {
 508                 int retry_count = 0;
 509
 510                 dprint(FD_IO, "drop page cache %s\n", f->file_name);
 511                 ret = blockdev_invalidate_cache(f);
 512                 while (ret < 0 && errno == EAGAIN && retry_count++ < 25) {
 513                         /*
 514                          * Linux multipath devices reject ioctl while
 515                          * the maps are being updated. That window can
 516                          * last tens of milliseconds; we'll try up to
 517                          * a quarter of a second.
 518                          */
 519                         usleep(10000);
 520                         ret = blockdev_invalidate_cache(f);
 521                 }
 522                 if (ret < 0 && errno == EACCES && geteuid()) {
 523                         if (!root_warn) {
 524                                 log_err("fio: only root may flush block "
 525                                         "devices. Cache flush bypassed!\n");
 526                                 root_warn = 1;
 527                         }
 528                         ret = 0;
 529                 }
 530                 if (ret < 0)
 531                         errval = errno;
 532         } else if (f->filetype == FIO_TYPE_CHAR ||
 533                    f->filetype == FIO_TYPE_PIPE) {
 534                 dprint(FD_IO, "invalidate not supported %s\n", f->file_name);
 535                 ret = 0;
 536         }
 537
 538         /*
 539          * Cache flushing isn't a fatal condition, and we know it will
 540          * happen on some platforms where we don't have the proper
 541          * function to flush eg block device caches. So just warn and
 542          * continue on our way.
 543          */
 544         if (errval)
 545                 log_info("fio: cache invalidation of %s failed: %s\n",
 546                          f->file_name, strerror(errval));
 547
 548         return 0;
 549
 550 }
 551
 552 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
 553 {
 554         if (!fio_file_open(f))
 555                 return 0;
 556
 557         return __file_invalidate_cache(td, f, -1ULL, -1ULL);
 558 }
 559
 560 int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
 561 {
 562         int ret = 0;
 563
 564         dprint(FD_FILE, "fd close %s\n", f->file_name);
 565
 566         remove_file_hash(f);
 567
 568         if (close(f->fd) < 0)
 569                 ret = errno;
 570
 571         f->fd = -1;
 572
 573         if (f->shadow_fd != -1) {
 574                 close(f->shadow_fd);
 575                 f->shadow_fd = -1;
 576         }
 577
 578         f->engine_pos = 0;
 579         return ret;
 580 }
 581
 582 int file_lookup_open(struct fio_file *f, int flags)
 583 {
 584         struct fio_file *__f;
 585         int from_hash;
 586
 587         __f = lookup_file_hash(f->file_name);
 588         if (__f) {
 589                 dprint(FD_FILE, "found file in hash %s\n", f->file_name);
 590                 f->lock = __f->lock;
 591                 from_hash = 1;
 592         } else {
 593                 dprint(FD_FILE, "file not found in hash %s\n", f->file_name);
 594                 from_hash = 0;
 595         }
 596
 597 #ifdef WIN32
 598         flags |= _O_BINARY;
 599 #endif
 600
 601         f->fd = open(f->file_name, flags, 0600);
 602         return from_hash;
 603 }
 604
 605 static int file_close_shadow_fds(struct thread_data *td)
 606 {
 607         struct fio_file *f;
 608         int num_closed = 0;
 609         unsigned int i;
 610
 611         for_each_file(td, f, i) {
 612                 if (f->shadow_fd == -1)
 613                         continue;
 614
 615                 close(f->shadow_fd);
 616                 f->shadow_fd = -1;
 617                 num_closed++;
 618         }
 619
 620         return num_closed;
 621 }
 622
 623 int generic_open_file(struct thread_data *td, struct fio_file *f)
 624 {
 625         int is_std = 0;
 626         int flags = 0;
 627         int from_hash = 0;
 628
 629         dprint(FD_FILE, "fd open %s\n", f->file_name);
 630
 631         if (!strcmp(f->file_name, "-")) {
 632                 if (td_rw(td)) {
 633                         log_err("fio: can't read/write to stdin/out\n");
 634                         return 1;
 635                 }
 636                 is_std = 1;
 637
 638                 /*
 639                  * move output logging to stderr, if we are writing to stdout
 640                  */
 641                 if (td_write(td))
 642                         f_out = stderr;
 643         }
 644
 645         if (td_trim(td))
 646                 goto skip_flags;
 647         if (td->o.odirect)
 648                 flags |= OS_O_DIRECT;
 649         if (td->o.oatomic) {
 650                 if (!FIO_O_ATOMIC) {
 651                         td_verror(td, EINVAL, "OS does not support atomic IO");
 652                         return 1;
 653                 }
 654                 flags |= OS_O_DIRECT | FIO_O_ATOMIC;
 655         }
 656         if (td->o.sync_io)
 657                 flags |= O_SYNC;
 658         if (td->o.create_on_open && td->o.allow_create)
 659                 flags |= O_CREAT;
 660 skip_flags:
 661         if (f->filetype != FIO_TYPE_FILE)
 662                 flags |= FIO_O_NOATIME;
 663
 664 open_again:
 665         if (td_write(td)) {
 666                 if (!read_only)
 667                         flags |= O_RDWR;
 668
 669                 if (f->filetype == FIO_TYPE_FILE && td->o.allow_create)
 670                         flags |= O_CREAT;
 671
 672                 if (is_std)
 673                         f->fd = dup(STDOUT_FILENO);
 674                 else
 675                         from_hash = file_lookup_open(f, flags);
 676         } else if (td_read(td)) {
 677                 if (f->filetype == FIO_TYPE_CHAR && !read_only)
 678                         flags |= O_RDWR;
 679                 else
 680                         flags |= O_RDONLY;
 681
 682                 if (is_std)
 683                         f->fd = dup(STDIN_FILENO);
 684                 else
 685                         from_hash = file_lookup_open(f, flags);
 686         } else if (td_trim(td)) {
 687                 assert(!td_rw(td)); /* should have matched above */
 688                 flags |= O_RDWR;
 689                 from_hash = file_lookup_open(f, flags);
 690         }
 691
 692         if (f->fd == -1) {
 693                 char buf[FIO_VERROR_SIZE];
 694                 int __e = errno;
 695
 696                 if (__e == EPERM && (flags & FIO_O_NOATIME)) {
 697                         flags &= ~FIO_O_NOATIME;
 698                         goto open_again;
 699                 }
 700                 if (__e == EMFILE && file_close_shadow_fds(td))
 701                         goto open_again;
 702
 703                 snprintf(buf, sizeof(buf), "open(%s)", f->file_name);
 704
 705                 if (__e == EINVAL && (flags & OS_O_DIRECT)) {
 706                         log_err("fio: looks like your file system does not " \
 707                                 "support direct=1/buffered=0\n");
 708                 }
 709
 710                 td_verror(td, __e, buf);
 711                 return 1;
 712         }
 713
 714         if (!from_hash && f->fd != -1) {
 715                 if (add_file_hash(f)) {
 716                         int fio_unused ret;
 717
 718                         /*
 719                          * Stash away descriptor for later close. This is to
 720                          * work-around a "feature" on Linux, where a close of
 721                          * an fd that has been opened for write will trigger
 722                          * udev to call blkid to check partitions, fs id, etc.
 723                          * That pollutes the device cache, which can slow down
 724                          * unbuffered accesses.
 725                          */
 726                         if (f->shadow_fd == -1)
 727                                 f->shadow_fd = f->fd;
 728                         else {
 729                                 /*
 730                                  * OK to ignore, we haven't done anything
 731                                  * with it
 732                                  */
 733                                 ret = generic_close_file(td, f);
 734                         }
 735                         goto open_again;
 736                 }
 737         }
 738
 739         return 0;
 740 }
 741
 742 /*
 743  * This function i.e. get_file_size() is the default .get_file_size
 744  * implementation of majority of I/O engines.
 745  */
 746 int generic_get_file_size(struct thread_data *td, struct fio_file *f)
 747 {
 748         return get_file_size(td, f);
 749 }
 750
 751 /*
 752  * open/close all files, so that ->real_file_size gets set
 753  */
 754 static int get_file_sizes(struct thread_data *td)
 755 {
 756         struct fio_file *f;
 757         unsigned int i;
 758         int err = 0;
 759
 760         for_each_file(td, f, i) {
 761                 dprint(FD_FILE, "get file size for %p/%d/%s\n", f, i,
 762                                                                 f->file_name);
 763
 764                 if (td_io_get_file_size(td, f)) {
 765                         if (td->error != ENOENT) {
 766                                 log_err("%s\n", td->verror);
 767                                 err = 1;
 768                                 break;
 769                         }
 770                         clear_error(td);
 771                 }
 772
 773                 /*
 774                  * There are corner cases where we end up with -1 for
 775                  * ->real_file_size due to unsupported file type, etc.
 776                  * We then just set to size option value divided by number
 777                  * of files, similar to the way file ->io_size is set.
 778                  * stat(2) failure doesn't set ->real_file_size to -1.
 779                  */
 780                 if (f->real_file_size == -1ULL && td->o.size)
 781                         f->real_file_size = td->o.size / td->o.nr_files;
 782         }
 783
 784         return err;
 785 }
 786
 787 struct fio_mount {
 788         struct flist_head list;
 789         const char *base;
 790         char __base[256];
 791         unsigned int key;
 792 };
 793
 794 /*
 795  * Get free number of bytes for each file on each unique mount.
 796  */
 797 static unsigned long long get_fs_free_counts(struct thread_data *td)
 798 {
 799         struct flist_head *n, *tmp;
 800         unsigned long long ret = 0;
 801         struct fio_mount *fm;
 802         FLIST_HEAD(list);
 803         struct fio_file *f;
 804         unsigned int i;
 805
 806         for_each_file(td, f, i) {
 807                 struct stat sb;
 808                 char buf[256];
 809
 810                 if (f->filetype == FIO_TYPE_BLOCK || f->filetype == FIO_TYPE_CHAR) {
 811                         if (f->real_file_size != -1ULL)
 812                                 ret += f->real_file_size;
 813                         continue;
 814                 } else if (f->filetype != FIO_TYPE_FILE)
 815                         continue;
 816
 817                 buf[255] = '\0';
 818                 strncpy(buf, f->file_name, 255);
 819
 820                 if (stat(buf, &sb) < 0) {
 821                         if (errno != ENOENT)
 822                                 break;
 823                         strcpy(buf, ".");
 824                         if (stat(buf, &sb) < 0)
 825                                 break;
 826                 }
 827
 828                 fm = NULL;
 829                 flist_for_each(n, &list) {
 830                         fm = flist_entry(n, struct fio_mount, list);
 831                         if (fm->key == sb.st_dev)
 832                                 break;
 833
 834                         fm = NULL;
 835                 }
 836
 837                 if (fm)
 838                         continue;
 839
 840                 fm = calloc(1, sizeof(*fm));
 841                 strncpy(fm->__base, buf, sizeof(fm->__base) - 1);
 842                 fm->base = basename(fm->__base);
 843                 fm->key = sb.st_dev;
 844                 flist_add(&fm->list, &list);
 845         }
 846
 847         flist_for_each_safe(n, tmp, &list) {
 848                 unsigned long long sz;
 849
 850                 fm = flist_entry(n, struct fio_mount, list);
 851                 flist_del(&fm->list);
 852
 853                 sz = get_fs_free_size(fm->base);
 854                 if (sz && sz != -1ULL)
 855                         ret += sz;
 856
 857                 free(fm);
 858         }
 859
 860         return ret;
 861 }
 862
 863 uint64_t get_start_offset(struct thread_data *td, struct fio_file *f)
 864 {
 865         struct thread_options *o = &td->o;
 866         unsigned long long align_bs;
 867         unsigned long long offset;
 868
 869         if (o->file_append && f->filetype == FIO_TYPE_FILE)
 870                 return f->real_file_size;
 871
 872         if (o->start_offset_percent > 0) {
 873                 /*
 874                  * if blockalign is provided, find the min across read, write,
 875                  * and trim
 876                  */
 877                 if (fio_option_is_set(o, ba)) {
 878                         align_bs = (unsigned long long) min(o->ba[DDIR_READ], o->ba[DDIR_WRITE]);
 879                         align_bs = min((unsigned long long) o->ba[DDIR_TRIM], align_bs);
 880                 } else {
 881                         /* else take the minimum block size */
 882                         align_bs = td_min_bs(td);
 883                 }
 884
 885                 /* calculate the raw offset */
 886                 offset = (f->real_file_size * o->start_offset_percent / 100) +
 887                         (td->subjob_number * o->offset_increment);
 888
 889                 /*
 890                  * block align the offset at the next available boundary at
 891                  * ceiling(offset / align_bs) * align_bs
 892                  */
 893                 offset = (offset / align_bs + (offset % align_bs != 0)) * align_bs;
 894
 895         } else {
 896                 /* start_offset_percent not set */
 897                 offset = o->start_offset +
 898                                 td->subjob_number * o->offset_increment;
 899         }
 900
 901         return offset;
 902 }
 903
 904 /*
 905  * Open the files and setup files sizes, creating files if necessary.
 906  */
 907 int setup_files(struct thread_data *td)
 908 {
 909         unsigned long long total_size, extend_size;
 910         struct thread_options *o = &td->o;
 911         struct fio_file *f;
 912         unsigned int i, nr_fs_extra = 0;
 913         int err = 0, need_extend;
 914         int old_state;
 915         const unsigned int bs = td_min_bs(td);
 916         uint64_t fs = 0;
 917
 918         dprint(FD_FILE, "setup files\n");
 919
 920         old_state = td_bump_runstate(td, TD_SETTING_UP);
 921
 922         if (o->read_iolog_file)
 923                 goto done;
 924
 925         /*
 926          * Find out physical size of files or devices for this thread,
 927          * before we determine I/O size and range of our targets.
 928          * If ioengine defines a setup() method, it's responsible for
 929          * opening the files and setting f->real_file_size to indicate
 930          * the valid range for that file.
 931          */
 932         if (td->io_ops->setup)
 933                 err = td->io_ops->setup(td);
 934         else
 935                 err = get_file_sizes(td);
 936
 937         if (err)
 938                 goto err_out;
 939
 940         /*
 941          * check sizes. if the files/devices do not exist and the size
 942          * isn't passed to fio, abort.
 943          */
 944         total_size = 0;
 945         for_each_file(td, f, i) {
 946                 f->fileno = i;
 947                 if (f->real_file_size == -1ULL)
 948                         total_size = -1ULL;
 949                 else
 950                         total_size += f->real_file_size;
 951         }
 952
 953         if (o->fill_device)
 954                 td->fill_device_size = get_fs_free_counts(td);
 955
 956         /*
 957          * device/file sizes are zero and no size given, punt
 958          */
 959         if ((!total_size || total_size == -1ULL) && !o->size &&
 960             !td_ioengine_flagged(td, FIO_NOIO) && !o->fill_device &&
 961             !(o->nr_files && (o->file_size_low || o->file_size_high))) {
 962                 log_err("%s: you need to specify size=\n", o->name);
 963                 td_verror(td, EINVAL, "total_file_size");
 964                 goto err_out;
 965         }
 966
 967         /*
 968          * Calculate per-file size and potential extra size for the
 969          * first files, if needed (i.e. if we don't have a fixed size).
 970          */
 971         if (!o->file_size_low && o->nr_files) {
 972                 uint64_t all_fs;
 973
 974                 fs = o->size / o->nr_files;
 975                 all_fs = fs * o->nr_files;
 976
 977                 if (all_fs < o->size)
 978                         nr_fs_extra = (o->size - all_fs) / bs;
 979         }
 980
 981         /*
 982          * now file sizes are known, so we can set ->io_size. if size= is
 983          * not given, ->io_size is just equal to ->real_file_size. if size
 984          * is given, ->io_size is size / nr_files.
 985          */
 986         extend_size = total_size = 0;
 987         need_extend = 0;
 988         for_each_file(td, f, i) {
 989                 f->file_offset = get_start_offset(td, f);
 990
 991                 /*
 992                  * Update ->io_size depending on options specified.
 993                  * ->file_size_low being 0 means filesize option isn't set.
 994                  * Non zero ->file_size_low equals ->file_size_high means
 995                  * filesize option is set in a fixed size format.
 996                  * Non zero ->file_size_low not equals ->file_size_high means
 997                  * filesize option is set in a range format.
 998                  */
 999                 if (!o->file_size_low) {
1000                         /*
1001                          * no file size or range given, file size is equal to
1002                          * total size divided by number of files. If the size
1003                          * doesn't divide nicely with the min blocksize,
1004                          * make the first files bigger.
1005                          */
1006                         f->io_size = fs;
1007                         if (nr_fs_extra) {
1008                                 nr_fs_extra--;
1009                                 f->io_size += bs;
1010                         }
1011
1012                         /*
1013                          * We normally don't come here for regular files, but
1014                          * if the result is 0 for a regular file, set it to the
1015                          * real file size. This could be size of the existing
1016                          * one if it already exists, but otherwise will be set
1017                          * to 0. A new file won't be created because
1018                          * ->io_size + ->file_offset equals ->real_file_size.
1019                          */
1020                         if (!f->io_size) {
1021                                 if (f->file_offset > f->real_file_size)
1022                                         goto err_offset;
1023                                 f->io_size = f->real_file_size - f->file_offset;
1024                                 if (!f->io_size)
1025                                         log_info("fio: file %s may be ignored\n",
1026                                                 f->file_name);
1027                         }
1028                 } else if (f->real_file_size < o->file_size_low ||
1029                            f->real_file_size > o->file_size_high) {
1030                         if (f->file_offset > o->file_size_low)
1031                                 goto err_offset;
1032                         /*
1033                          * file size given. if it's fixed, use that. if it's a
1034                          * range, generate a random size in-between.
1035                          */
1036                         if (o->file_size_low == o->file_size_high)
1037                                 f->io_size = o->file_size_low - f->file_offset;
1038                         else {
1039                                 f->io_size = get_rand_file_size(td)
1040                                                 - f->file_offset;
1041                         }
1042                 } else
1043                         f->io_size = f->real_file_size - f->file_offset;
1044
1045                 if (f->io_size == -1ULL)
1046                         total_size = -1ULL;
1047                 else {
1048                         if (o->size_percent) {
1049                                 uint64_t file_size;
1050
1051                                 file_size = f->io_size + f->file_offset;
1052                                 f->io_size = (file_size *
1053                                               o->size_percent) / 100;
1054                                 if (f->io_size > (file_size - f->file_offset))
1055                                         f->io_size = file_size - f->file_offset;
1056
1057                                 f->io_size -= (f->io_size % td_min_bs(td));
1058                         }
1059                         total_size += f->io_size;
1060                 }
1061
1062                 if (f->filetype == FIO_TYPE_FILE &&
1063                     (f->io_size + f->file_offset) > f->real_file_size &&
1064                     !td_ioengine_flagged(td, FIO_DISKLESSIO)) {
1065                         if (!o->create_on_open) {
1066                                 need_extend++;
1067                                 extend_size += (f->io_size + f->file_offset);
1068                                 fio_file_set_extend(f);
1069                         } else
1070                                 f->real_file_size = f->io_size + f->file_offset;
1071                 }
1072         }
1073
1074         if (td->o.block_error_hist) {
1075                 int len;
1076
1077                 assert(td->o.nr_files == 1);    /* checked in fixup_options */
1078                 f = td->files[0];
1079                 len = f->io_size / td->o.bs[DDIR_TRIM];
1080                 if (len > MAX_NR_BLOCK_INFOS || len <= 0) {
1081                         log_err("fio: cannot calculate block histogram with "
1082                                 "%d trim blocks, maximum %d\n",
1083                                 len, MAX_NR_BLOCK_INFOS);
1084                         td_verror(td, EINVAL, "block_error_hist");
1085                         goto err_out;
1086                 }
1087
1088                 td->ts.nr_block_infos = len;
1089                 for (i = 0; i < len; i++)
1090                         td->ts.block_infos[i] =
1091                                 BLOCK_INFO(0, BLOCK_STATE_UNINIT);
1092         } else
1093                 td->ts.nr_block_infos = 0;
1094
1095         if (!o->size || (total_size && o->size > total_size))
1096                 o->size = total_size;
1097
1098         if (o->size < td_min_bs(td)) {
1099                 log_err("fio: blocksize too large for data set\n");
1100                 goto err_out;
1101         }
1102
1103         /*
1104          * See if we need to extend some files, typically needed when our
1105          * target regular files don't exist yet, but our jobs require them
1106          * initially due to read I/Os.
1107          */
1108         if (need_extend) {
1109                 temp_stall_ts = 1;
1110                 if (output_format & FIO_OUTPUT_NORMAL) {
1111                         log_info("%s: Laying out IO file%s (%u file%s / %s%lluMiB)\n",
1112                                  o->name,
1113                                  need_extend > 1 ? "s" : "",
1114                                  need_extend,
1115                                  need_extend > 1 ? "s" : "",
1116                                  need_extend > 1 ? "total " : "",
1117                                  extend_size >> 20);
1118                 }
1119
1120                 for_each_file(td, f, i) {
1121                         unsigned long long old_len = -1ULL, extend_len = -1ULL;
1122
1123                         if (!fio_file_extend(f))
1124                                 continue;
1125
1126                         assert(f->filetype == FIO_TYPE_FILE);
1127                         fio_file_clear_extend(f);
1128                         if (!o->fill_device) {
1129                                 old_len = f->real_file_size;
1130                                 extend_len = f->io_size + f->file_offset -
1131                                                 old_len;
1132                         }
1133                         f->real_file_size = (f->io_size + f->file_offset);
1134                         err = extend_file(td, f);
1135                         if (err)
1136                                 break;
1137
1138                         err = __file_invalidate_cache(td, f, old_len,
1139                                                                 extend_len);
1140
1141                         /*
1142                          * Shut up static checker
1143                          */
1144                         if (f->fd != -1)
1145                                 close(f->fd);
1146
1147                         f->fd = -1;
1148                         if (err)
1149                                 break;
1150                 }
1151                 temp_stall_ts = 0;
1152         }
1153
1154         if (err)
1155                 goto err_out;
1156
1157         if (!o->zone_size)
1158                 o->zone_size = o->size;
1159
1160         /*
1161          * iolog already set the total io size, if we read back
1162          * stored entries.
1163          */
1164         if (!o->read_iolog_file) {
1165                 if (o->io_size)
1166                         td->total_io_size = o->io_size * o->loops;
1167                 else
1168                         td->total_io_size = o->size * o->loops;
1169         }
1170
1171 done:
1172         if (o->create_only)
1173                 td->done = 1;
1174
1175         td_restore_runstate(td, old_state);
1176         return 0;
1177 err_offset:
1178         log_err("%s: you need to specify valid offset=\n", o->name);
1179 err_out:
1180         td_restore_runstate(td, old_state);
1181         return 1;
1182 }
1183
1184 int pre_read_files(struct thread_data *td)
1185 {
1186         struct fio_file *f;
1187         unsigned int i;
1188
1189         dprint(FD_FILE, "pre_read files\n");
1190
1191         for_each_file(td, f, i) {
1192                 if (pre_read_file(td, f))
1193                         return -1;
1194         }
1195
1196         return 0;
1197 }
1198
1199 static int __init_rand_distribution(struct thread_data *td, struct fio_file *f)
1200 {
1201         unsigned int range_size, seed;
1202         unsigned long nranges;
1203         uint64_t fsize;
1204
1205         range_size = min(td->o.min_bs[DDIR_READ], td->o.min_bs[DDIR_WRITE]);
1206         fsize = min(f->real_file_size, f->io_size);
1207
1208         nranges = (fsize + range_size - 1) / range_size;
1209
1210         seed = jhash(f->file_name, strlen(f->file_name), 0) * td->thread_number;
1211         if (!td->o.rand_repeatable)
1212                 seed = td->rand_seeds[4];
1213
1214         if (td->o.random_distribution == FIO_RAND_DIST_ZIPF)
1215                 zipf_init(&f->zipf, nranges, td->o.zipf_theta.u.f, seed);
1216         else if (td->o.random_distribution == FIO_RAND_DIST_PARETO)
1217                 pareto_init(&f->zipf, nranges, td->o.pareto_h.u.f, seed);
1218         else if (td->o.random_distribution == FIO_RAND_DIST_GAUSS)
1219                 gauss_init(&f->gauss, nranges, td->o.gauss_dev.u.f, seed);
1220
1221         return 1;
1222 }
1223
1224 static int init_rand_distribution(struct thread_data *td)
1225 {
1226         struct fio_file *f;
1227         unsigned int i;
1228         int state;
1229
1230         if (td->o.random_distribution == FIO_RAND_DIST_RANDOM)
1231                 return 0;
1232
1233         state = td_bump_runstate(td, TD_SETTING_UP);
1234
1235         for_each_file(td, f, i)
1236                 __init_rand_distribution(td, f);
1237
1238         td_restore_runstate(td, state);
1239
1240         return 1;
1241 }
1242
1243 /*
1244  * Check if the number of blocks exceeds the randomness capability of
1245  * the selected generator. Tausworthe is 32-bit, the others are fullly
1246  * 64-bit capable.
1247  */
1248 static int check_rand_gen_limits(struct thread_data *td, struct fio_file *f,
1249                                  uint64_t blocks)
1250 {
1251         if (blocks <= FRAND32_MAX)
1252                 return 0;
1253         if (td->o.random_generator != FIO_RAND_GEN_TAUSWORTHE)
1254                 return 0;
1255
1256         /*
1257          * If the user hasn't specified a random generator, switch
1258          * to tausworthe64 with informational warning. If the user did
1259          * specify one, just warn.
1260          */
1261         log_info("fio: file %s exceeds 32-bit tausworthe random generator.\n",
1262                         f->file_name);
1263
1264         if (!fio_option_is_set(&td->o, random_generator)) {
1265                 log_info("fio: Switching to tausworthe64. Use the "
1266                          "random_generator= option to get rid of this "
1267                          "warning.\n");
1268                 td->o.random_generator = FIO_RAND_GEN_TAUSWORTHE64;
1269                 return 0;
1270         }
1271
1272         /*
1273          * Just make this information to avoid breaking scripts.
1274          */
1275         log_info("fio: Use the random_generator= option to switch to lfsr or "
1276                          "tausworthe64.\n");
1277         return 0;
1278 }
1279
1280 int init_random_map(struct thread_data *td)
1281 {
1282         unsigned long long blocks;
1283         struct fio_file *f;
1284         unsigned int i;
1285
1286         if (init_rand_distribution(td))
1287                 return 0;
1288         if (!td_random(td))
1289                 return 0;
1290
1291         for_each_file(td, f, i) {
1292                 uint64_t fsize = min(f->real_file_size, f->io_size);
1293
1294                 blocks = fsize / (unsigned long long) td->o.rw_min_bs;
1295
1296                 if (check_rand_gen_limits(td, f, blocks))
1297                         return 1;
1298
1299                 if (td->o.random_generator == FIO_RAND_GEN_LFSR) {
1300                         unsigned long seed;
1301
1302                         seed = td->rand_seeds[FIO_RAND_BLOCK_OFF];
1303
1304                         if (!lfsr_init(&f->lfsr, blocks, seed, 0)) {
1305                                 fio_file_set_lfsr(f);
1306                                 continue;
1307                         }
1308                 } else if (!td->o.norandommap) {
1309                         f->io_axmap = axmap_new(blocks);
1310                         if (f->io_axmap) {
1311                                 fio_file_set_axmap(f);
1312                                 continue;
1313                         }
1314                 } else if (td->o.norandommap)
1315                         continue;
1316
1317                 if (!td->o.softrandommap) {
1318                         log_err("fio: failed allocating random map. If running"
1319                                 " a large number of jobs, try the 'norandommap'"
1320                                 " option or set 'softrandommap'. Or give"
1321                                 " a larger --alloc-size to fio.\n");
1322                         return 1;
1323                 }
1324
1325                 log_info("fio: file %s failed allocating random map. Running "
1326                          "job without.\n", f->file_name);
1327         }
1328
1329         return 0;
1330 }
1331
1332 void close_files(struct thread_data *td)
1333 {
1334         struct fio_file *f;
1335         unsigned int i;
1336
1337         for_each_file(td, f, i) {
1338                 if (fio_file_open(f))
1339                         td_io_close_file(td, f);
1340         }
1341 }
1342
1343 void close_and_free_files(struct thread_data *td)
1344 {
1345         struct fio_file *f;
1346         unsigned int i;
1347
1348         dprint(FD_FILE, "close files\n");
1349
1350         for_each_file(td, f, i) {
1351                 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
1352                         dprint(FD_FILE, "free unlink %s\n", f->file_name);
1353                         td_io_unlink_file(td, f);
1354                 }
1355
1356                 if (fio_file_open(f))
1357                         td_io_close_file(td, f);
1358
1359                 remove_file_hash(f);
1360
1361                 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
1362                         dprint(FD_FILE, "free unlink %s\n", f->file_name);
1363                         td_io_unlink_file(td, f);
1364                 }
1365
1366                 sfree(f->file_name);
1367                 f->file_name = NULL;
1368                 if (fio_file_axmap(f)) {
1369                         axmap_free(f->io_axmap);
1370                         f->io_axmap = NULL;
1371                 }
1372                 sfree(f);
1373         }
1374
1375         td->o.filename = NULL;
1376         free(td->files);
1377         free(td->file_locks);
1378         td->files_index = 0;
1379         td->files = NULL;
1380         td->file_locks = NULL;
1381         td->o.file_lock_mode = FILE_LOCK_NONE;
1382         td->o.nr_files = 0;
1383 }
1384
1385 static void get_file_type(struct fio_file *f)
1386 {
1387         struct stat sb;
1388
1389         if (!strcmp(f->file_name, "-"))
1390                 f->filetype = FIO_TYPE_PIPE;
1391         else
1392                 f->filetype = FIO_TYPE_FILE;
1393
1394 #ifdef WIN32
1395         /* \\.\ is the device namespace in Windows, where every file is
1396          * a block device */
1397         if (strncmp(f->file_name, "\\\\.\\", 4) == 0)
1398                 f->filetype = FIO_TYPE_BLOCK;
1399 #endif
1400
1401         if (!stat(f->file_name, &sb)) {
1402                 if (S_ISBLK(sb.st_mode))
1403                         f->filetype = FIO_TYPE_BLOCK;
1404                 else if (S_ISCHR(sb.st_mode))
1405                         f->filetype = FIO_TYPE_CHAR;
1406                 else if (S_ISFIFO(sb.st_mode))
1407                         f->filetype = FIO_TYPE_PIPE;
1408         }
1409 }
1410
1411 static bool __is_already_allocated(const char *fname, bool set)
1412 {
1413         struct flist_head *entry;
1414         bool ret;
1415
1416         ret = file_bloom_exists(fname, set);
1417         if (!ret)
1418                 return ret;
1419
1420         flist_for_each(entry, &filename_list) {
1421                 struct file_name *fn;
1422
1423                 fn = flist_entry(entry, struct file_name, list);
1424
1425                 if (!strcmp(fn->filename, fname))
1426                         return true;
1427         }
1428
1429         return false;
1430 }
1431
1432 static bool is_already_allocated(const char *fname)
1433 {
1434         bool ret;
1435
1436         fio_file_hash_lock();
1437         ret = __is_already_allocated(fname, false);
1438         fio_file_hash_unlock();
1439
1440         return ret;
1441 }
1442
1443 static void set_already_allocated(const char *fname)
1444 {
1445         struct file_name *fn;
1446
1447         fn = malloc(sizeof(struct file_name));
1448         fn->filename = strdup(fname);
1449
1450         fio_file_hash_lock();
1451         if (!__is_already_allocated(fname, true)) {
1452                 flist_add_tail(&fn->list, &filename_list);
1453                 fn = NULL;
1454         }
1455         fio_file_hash_unlock();
1456
1457         if (fn) {
1458                 free(fn->filename);
1459                 free(fn);
1460         }
1461 }
1462
1463 static void free_already_allocated(void)
1464 {
1465         struct flist_head *entry, *tmp;
1466         struct file_name *fn;
1467
1468         if (flist_empty(&filename_list))
1469                 return;
1470
1471         fio_file_hash_lock();
1472         flist_for_each_safe(entry, tmp, &filename_list) {
1473                 fn = flist_entry(entry, struct file_name, list);
1474                 free(fn->filename);
1475                 flist_del(&fn->list);
1476                 free(fn);
1477         }
1478
1479         fio_file_hash_unlock();
1480 }
1481
1482 static struct fio_file *alloc_new_file(struct thread_data *td)
1483 {
1484         struct fio_file *f;
1485
1486         f = smalloc(sizeof(*f));
1487         if (!f) {
1488                 assert(0);
1489                 return NULL;
1490         }
1491
1492         f->fd = -1;
1493         f->shadow_fd = -1;
1494         fio_file_reset(td, f);
1495         return f;
1496 }
1497
1498 bool exists_and_not_regfile(const char *filename)
1499 {
1500         struct stat sb;
1501
1502         if (lstat(filename, &sb) == -1)
1503                 return false;
1504
1505 #ifndef WIN32 /* NOT Windows */
1506         if (S_ISREG(sb.st_mode))
1507                 return false;
1508 #else
1509         /* \\.\ is the device namespace in Windows, where every file
1510          * is a device node */
1511         if (S_ISREG(sb.st_mode) && strncmp(filename, "\\\\.\\", 4) != 0)
1512                 return false;
1513 #endif
1514
1515         return true;
1516 }
1517
1518 int add_file(struct thread_data *td, const char *fname, int numjob, int inc)
1519 {
1520         int cur_files = td->files_index;
1521         char file_name[PATH_MAX];
1522         struct fio_file *f;
1523         int len = 0;
1524
1525         dprint(FD_FILE, "add file %s\n", fname);
1526
1527         if (td->o.directory)
1528                 len = set_name_idx(file_name, PATH_MAX, td->o.directory, numjob,
1529                                         td->o.unique_filename);
1530
1531         sprintf(file_name + len, "%s", fname);
1532
1533         /* clean cloned siblings using existing files */
1534         if (numjob && is_already_allocated(file_name) &&
1535             !exists_and_not_regfile(fname))
1536                 return 0;
1537
1538         f = alloc_new_file(td);
1539
1540         if (td->files_size <= td->files_index) {
1541                 unsigned int new_size = td->o.nr_files + 1;
1542
1543                 dprint(FD_FILE, "resize file array to %d files\n", new_size);
1544
1545                 td->files = realloc(td->files, new_size * sizeof(f));
1546                 if (td->files == NULL) {
1547                         log_err("fio: realloc OOM\n");
1548                         assert(0);
1549                 }
1550                 if (td->o.file_lock_mode != FILE_LOCK_NONE) {
1551                         td->file_locks = realloc(td->file_locks, new_size);
1552                         if (!td->file_locks) {
1553                                 log_err("fio: realloc OOM\n");
1554                                 assert(0);
1555                         }
1556                         td->file_locks[cur_files] = FILE_LOCK_NONE;
1557                 }
1558                 td->files_size = new_size;
1559         }
1560         td->files[cur_files] = f;
1561         f->fileno = cur_files;
1562
1563         /*
1564          * init function, io engine may not be loaded yet
1565          */
1566         if (td->io_ops && td_ioengine_flagged(td, FIO_DISKLESSIO))
1567                 f->real_file_size = -1ULL;
1568
1569         f->file_name = smalloc_strdup(file_name);
1570         if (!f->file_name)
1571                 assert(0);
1572
1573         get_file_type(f);
1574
1575         switch (td->o.file_lock_mode) {
1576         case FILE_LOCK_NONE:
1577                 break;
1578         case FILE_LOCK_READWRITE:
1579                 f->rwlock = fio_rwlock_init();
1580                 break;
1581         case FILE_LOCK_EXCLUSIVE:
1582                 f->lock = fio_mutex_init(FIO_MUTEX_UNLOCKED);
1583                 break;
1584         default:
1585                 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
1586                 assert(0);
1587         }
1588
1589         td->files_index++;
1590         if (f->filetype == FIO_TYPE_FILE)
1591                 td->nr_normal_files++;
1592
1593         set_already_allocated(file_name);
1594
1595         if (inc)
1596                 td->o.nr_files++;
1597
1598         dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name,
1599                                                         cur_files);
1600
1601         return cur_files;
1602 }
1603
1604 int add_file_exclusive(struct thread_data *td, const char *fname)
1605 {
1606         struct fio_file *f;
1607         unsigned int i;
1608
1609         for_each_file(td, f, i) {
1610                 if (!strcmp(f->file_name, fname))
1611                         return i;
1612         }
1613
1614         return add_file(td, fname, 0, 1);
1615 }
1616
1617 void get_file(struct fio_file *f)
1618 {
1619         dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
1620         assert(fio_file_open(f));
1621         f->references++;
1622 }
1623
1624 int put_file(struct thread_data *td, struct fio_file *f)
1625 {
1626         int f_ret = 0, ret = 0;
1627
1628         dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
1629
1630         if (!fio_file_open(f)) {
1631                 assert(f->fd == -1);
1632                 return 0;
1633         }
1634
1635         assert(f->references);
1636         if (--f->references)
1637                 return 0;
1638
1639         if (should_fsync(td) && td->o.fsync_on_close) {
1640                 f_ret = fsync(f->fd);
1641                 if (f_ret < 0)
1642                         f_ret = errno;
1643         }
1644
1645         if (td->io_ops->close_file)
1646                 ret = td->io_ops->close_file(td, f);
1647
1648         if (!ret)
1649                 ret = f_ret;
1650
1651         td->nr_open_files--;
1652         fio_file_clear_open(f);
1653         assert(f->fd == -1);
1654         return ret;
1655 }
1656
1657 void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
1658 {
1659         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1660                 return;
1661
1662         if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
1663                 if (ddir == DDIR_READ)
1664                         fio_rwlock_read(f->rwlock);
1665                 else
1666                         fio_rwlock_write(f->rwlock);
1667         } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1668                 fio_mutex_down(f->lock);
1669
1670         td->file_locks[f->fileno] = td->o.file_lock_mode;
1671 }
1672
1673 void unlock_file(struct thread_data *td, struct fio_file *f)
1674 {
1675         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1676                 return;
1677
1678         if (td->o.file_lock_mode == FILE_LOCK_READWRITE)
1679                 fio_rwlock_unlock(f->rwlock);
1680         else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1681                 fio_mutex_up(f->lock);
1682
1683         td->file_locks[f->fileno] = FILE_LOCK_NONE;
1684 }
1685
1686 void unlock_file_all(struct thread_data *td, struct fio_file *f)
1687 {
1688         if (td->o.file_lock_mode == FILE_LOCK_NONE || !td->file_locks)
1689                 return;
1690         if (td->file_locks[f->fileno] != FILE_LOCK_NONE)
1691                 unlock_file(td, f);
1692 }
1693
1694 static int recurse_dir(struct thread_data *td, const char *dirname)
1695 {
1696         struct dirent *dir;
1697         int ret = 0;
1698         DIR *D;
1699
1700         D = opendir(dirname);
1701         if (!D) {
1702                 char buf[FIO_VERROR_SIZE];
1703
1704                 snprintf(buf, FIO_VERROR_SIZE, "opendir(%s)", dirname);
1705                 td_verror(td, errno, buf);
1706                 return 1;
1707         }
1708
1709         while ((dir = readdir(D)) != NULL) {
1710                 char full_path[PATH_MAX];
1711                 struct stat sb;
1712
1713                 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
1714                         continue;
1715
1716                 sprintf(full_path, "%s%s%s", dirname, FIO_OS_PATH_SEPARATOR, dir->d_name);
1717
1718                 if (lstat(full_path, &sb) == -1) {
1719                         if (errno != ENOENT) {
1720                                 td_verror(td, errno, "stat");
1721                                 ret = 1;
1722                                 break;
1723                         }
1724                 }
1725
1726                 if (S_ISREG(sb.st_mode)) {
1727                         add_file(td, full_path, 0, 1);
1728                         continue;
1729                 }
1730                 if (!S_ISDIR(sb.st_mode))
1731                         continue;
1732
1733                 ret = recurse_dir(td, full_path);
1734                 if (ret)
1735                         break;
1736         }
1737
1738         closedir(D);
1739         return ret;
1740 }
1741
1742 int add_dir_files(struct thread_data *td, const char *path)
1743 {
1744         int ret = recurse_dir(td, path);
1745
1746         if (!ret)
1747                 log_info("fio: opendir added %d files\n", td->o.nr_files);
1748
1749         return ret;
1750 }
1751
1752 void dup_files(struct thread_data *td, struct thread_data *org)
1753 {
1754         struct fio_file *f;
1755         unsigned int i;
1756
1757         dprint(FD_FILE, "dup files: %d\n", org->files_index);
1758
1759         if (!org->files)
1760                 return;
1761
1762         td->files = malloc(org->files_index * sizeof(f));
1763
1764         if (td->o.file_lock_mode != FILE_LOCK_NONE)
1765                 td->file_locks = malloc(org->files_index);
1766
1767         for_each_file(org, f, i) {
1768                 struct fio_file *__f;
1769
1770                 __f = alloc_new_file(td);
1771
1772                 if (f->file_name) {
1773                         __f->file_name = smalloc_strdup(f->file_name);
1774                         if (!__f->file_name)
1775                                 assert(0);
1776
1777                         __f->filetype = f->filetype;
1778                 }
1779
1780                 if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1781                         __f->lock = f->lock;
1782                 else if (td->o.file_lock_mode == FILE_LOCK_READWRITE)
1783                         __f->rwlock = f->rwlock;
1784
1785                 td->files[i] = __f;
1786         }
1787 }
1788
1789 /*
1790  * Returns the index that matches the filename, or -1 if not there
1791  */
1792 int get_fileno(struct thread_data *td, const char *fname)
1793 {
1794         struct fio_file *f;
1795         unsigned int i;
1796
1797         for_each_file(td, f, i)
1798                 if (!strcmp(f->file_name, fname))
1799                         return i;
1800
1801         return -1;
1802 }
1803
1804 /*
1805  * For log usage, where we add/open/close files automatically
1806  */
1807 void free_release_files(struct thread_data *td)
1808 {
1809         close_files(td);
1810         td->o.nr_files = 0;
1811         td->o.open_files = 0;
1812         td->files_index = 0;
1813         td->nr_normal_files = 0;
1814 }
1815
1816 void fio_file_reset(struct thread_data *td, struct fio_file *f)
1817 {
1818         int i;
1819
1820         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1821                 f->last_pos[i] = f->file_offset;
1822                 f->last_start[i] = -1ULL;
1823         }
1824
1825         if (fio_file_axmap(f))
1826                 axmap_reset(f->io_axmap);
1827         else if (fio_file_lfsr(f))
1828                 lfsr_reset(&f->lfsr, td->rand_seeds[FIO_RAND_BLOCK_OFF]);
1829 }
1830
1831 bool fio_files_done(struct thread_data *td)
1832 {
1833         struct fio_file *f;
1834         unsigned int i;
1835
1836         for_each_file(td, f, i)
1837                 if (!fio_file_done(f))
1838                         return false;
1839
1840         return true;
1841 }
1842
1843 /* free memory used in initialization phase only */
1844 void filesetup_mem_free(void)
1845 {
1846         free_already_allocated();
1847 }