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 static inline void clear_error(struct thread_data *td)
  28 {
  29         td->error = 0;
  30         td->verror[0] = '\0';
  31 }
  32
  33 /*
  34  * Leaves f->fd open on success, caller must close
  35  */
  36 static int extend_file(struct thread_data *td, struct fio_file *f)
  37 {
  38         int r, new_layout = 0, unlink_file = 0, flags;
  39         unsigned long long left;
  40         unsigned int bs;
  41         char *b = NULL;
  42
  43         if (read_only) {
  44                 log_err("fio: refusing extend of file due to read-only\n");
  45                 return 0;
  46         }
  47
  48         /*
  49          * check if we need to lay the file out complete again. fio
  50          * does that for operations involving reads, or for writes
  51          * where overwrite is set
  52          */
  53         if (td_read(td) ||
  54            (td_write(td) && td->o.overwrite && !td->o.file_append) ||
  55             (td_write(td) && td->io_ops->flags & FIO_NOEXTEND))
  56                 new_layout = 1;
  57         if (td_write(td) && !td->o.overwrite && !td->o.file_append)
  58                 unlink_file = 1;
  59
  60         if (unlink_file || new_layout) {
  61                 dprint(FD_FILE, "layout unlink %s\n", f->file_name);
  62                 if ((td_io_unlink_file(td, f) < 0) && (errno != ENOENT)) {
  63                         td_verror(td, errno, "unlink");
  64                         return 1;
  65                 }
  66         }
  67
  68         flags = O_WRONLY;
  69         if (td->o.allow_create)
  70                 flags |= O_CREAT;
  71         if (new_layout)
  72                 flags |= O_TRUNC;
  73
  74 #ifdef WIN32
  75         flags |= _O_BINARY;
  76 #endif
  77
  78         dprint(FD_FILE, "open file %s, flags %x\n", f->file_name, flags);
  79         f->fd = open(f->file_name, flags, 0644);
  80         if (f->fd < 0) {
  81                 int err = errno;
  82
  83                 if (err == ENOENT && !td->o.allow_create)
  84                         log_err("fio: file creation disallowed by "
  85                                         "allow_file_create=0\n");
  86                 else
  87                         td_verror(td, err, "open");
  88                 return 1;
  89         }
  90
  91 #ifdef CONFIG_POSIX_FALLOCATE
  92         if (!td->o.fill_device) {
  93                 switch (td->o.fallocate_mode) {
  94                 case FIO_FALLOCATE_NONE:
  95                         break;
  96                 case FIO_FALLOCATE_POSIX:
  97                         dprint(FD_FILE, "posix_fallocate file %s size %llu\n",
  98                                  f->file_name,
  99                                  (unsigned long long) f->real_file_size);
 100
 101                         r = posix_fallocate(f->fd, 0, f->real_file_size);
 102                         if (r > 0) {
 103                                 log_err("fio: posix_fallocate fails: %s\n",
 104                                                 strerror(r));
 105                         }
 106                         break;
 107 #ifdef CONFIG_LINUX_FALLOCATE
 108                 case FIO_FALLOCATE_KEEP_SIZE:
 109                         dprint(FD_FILE,
 110                                 "fallocate(FALLOC_FL_KEEP_SIZE) "
 111                                 "file %s size %llu\n", f->file_name,
 112                                 (unsigned long long) f->real_file_size);
 113
 114                         r = fallocate(f->fd, FALLOC_FL_KEEP_SIZE, 0,
 115                                         f->real_file_size);
 116                         if (r != 0)
 117                                 td_verror(td, errno, "fallocate");
 118
 119                         break;
 120 #endif /* CONFIG_LINUX_FALLOCATE */
 121                 default:
 122                         log_err("fio: unknown fallocate mode: %d\n",
 123                                 td->o.fallocate_mode);
 124                         assert(0);
 125                 }
 126         }
 127 #endif /* CONFIG_POSIX_FALLOCATE */
 128
 129         if (!new_layout)
 130                 goto done;
 131
 132         /*
 133          * The size will be -1ULL when fill_device is used, so don't truncate
 134          * or fallocate this file, just write it
 135          */
 136         if (!td->o.fill_device) {
 137                 dprint(FD_FILE, "truncate file %s, size %llu\n", f->file_name,
 138                                         (unsigned long long) f->real_file_size);
 139                 if (ftruncate(f->fd, f->real_file_size) == -1) {
 140                         if (errno != EFBIG) {
 141                                 td_verror(td, errno, "ftruncate");
 142                                 goto err;
 143                         }
 144                 }
 145         }
 146
 147         b = malloc(td->o.max_bs[DDIR_WRITE]);
 148
 149         left = f->real_file_size;
 150         while (left && !td->terminate) {
 151                 bs = td->o.max_bs[DDIR_WRITE];
 152                 if (bs > left)
 153                         bs = left;
 154
 155                 fill_io_buffer(td, b, bs, bs);
 156
 157                 r = write(f->fd, b, bs);
 158
 159                 if (r > 0) {
 160                         left -= r;
 161                         continue;
 162                 } else {
 163                         if (r < 0) {
 164                                 int __e = errno;
 165
 166                                 if (__e == ENOSPC) {
 167                                         if (td->o.fill_device)
 168                                                 break;
 169                                         log_info("fio: ENOSPC on laying out "
 170                                                  "file, stopping\n");
 171                                         break;
 172                                 }
 173                                 td_verror(td, errno, "write");
 174                         } else
 175                                 td_verror(td, EIO, "write");
 176
 177                         break;
 178                 }
 179         }
 180
 181         if (td->terminate) {
 182                 dprint(FD_FILE, "terminate unlink %s\n", f->file_name);
 183                 td_io_unlink_file(td, f);
 184         } else if (td->o.create_fsync) {
 185                 if (fsync(f->fd) < 0) {
 186                         td_verror(td, errno, "fsync");
 187                         goto err;
 188                 }
 189         }
 190         if (td->o.fill_device && !td_write(td)) {
 191                 fio_file_clear_size_known(f);
 192                 if (td_io_get_file_size(td, f))
 193                         goto err;
 194                 if (f->io_size > f->real_file_size)
 195                         f->io_size = f->real_file_size;
 196         }
 197
 198         free(b);
 199 done:
 200         return 0;
 201 err:
 202         close(f->fd);
 203         f->fd = -1;
 204         if (b)
 205                 free(b);
 206         return 1;
 207 }
 208
 209 static int pre_read_file(struct thread_data *td, struct fio_file *f)
 210 {
 211         int ret = 0, r, did_open = 0, old_runstate;
 212         unsigned long long left;
 213         unsigned int bs;
 214         char *b;
 215
 216         if (td->io_ops->flags & FIO_PIPEIO)
 217                 return 0;
 218
 219         if (!fio_file_open(f)) {
 220                 if (td->io_ops->open_file(td, f)) {
 221                         log_err("fio: cannot pre-read, failed to open file\n");
 222                         return 1;
 223                 }
 224                 did_open = 1;
 225         }
 226
 227         old_runstate = td_bump_runstate(td, TD_PRE_READING);
 228
 229         bs = td->o.max_bs[DDIR_READ];
 230         b = malloc(bs);
 231         memset(b, 0, bs);
 232
 233         if (lseek(f->fd, f->file_offset, SEEK_SET) < 0) {
 234                 td_verror(td, errno, "lseek");
 235                 log_err("fio: failed to lseek pre-read file\n");
 236                 ret = 1;
 237                 goto error;
 238         }
 239
 240         left = f->io_size;
 241
 242         while (left && !td->terminate) {
 243                 if (bs > left)
 244                         bs = left;
 245
 246                 r = read(f->fd, b, bs);
 247
 248                 if (r == (int) bs) {
 249                         left -= bs;
 250                         continue;
 251                 } else {
 252                         td_verror(td, EIO, "pre_read");
 253                         break;
 254                 }
 255         }
 256
 257 error:
 258         td_restore_runstate(td, old_runstate);
 259
 260         if (did_open)
 261                 td->io_ops->close_file(td, f);
 262
 263         free(b);
 264         return ret;
 265 }
 266
 267 unsigned long long get_rand_file_size(struct thread_data *td)
 268 {
 269         unsigned long long ret, sized;
 270         uint64_t frand_max;
 271         unsigned long r;
 272
 273         frand_max = rand_max(&td->file_size_state);
 274         r = __rand(&td->file_size_state);
 275         sized = td->o.file_size_high - td->o.file_size_low;
 276         ret = (unsigned long long) ((double) sized * (r / (frand_max + 1.0)));
 277         ret += td->o.file_size_low;
 278         ret -= (ret % td->o.rw_min_bs);
 279         return ret;
 280 }
 281
 282 static int file_size(struct thread_data *td, struct fio_file *f)
 283 {
 284         struct stat st;
 285
 286         if (stat(f->file_name, &st) == -1) {
 287                 td_verror(td, errno, "fstat");
 288                 return 1;
 289         }
 290
 291         f->real_file_size = st.st_size;
 292         return 0;
 293 }
 294
 295 static int bdev_size(struct thread_data *td, struct fio_file *f)
 296 {
 297         unsigned long long bytes = 0;
 298         int r;
 299
 300         if (td->io_ops->open_file(td, f)) {
 301                 log_err("fio: failed opening blockdev %s for size check\n",
 302                         f->file_name);
 303                 return 1;
 304         }
 305
 306         r = blockdev_size(f, &bytes);
 307         if (r) {
 308                 td_verror(td, r, "blockdev_size");
 309                 goto err;
 310         }
 311
 312         if (!bytes) {
 313                 log_err("%s: zero sized block device?\n", f->file_name);
 314                 goto err;
 315         }
 316
 317         f->real_file_size = bytes;
 318         td->io_ops->close_file(td, f);
 319         return 0;
 320 err:
 321         td->io_ops->close_file(td, f);
 322         return 1;
 323 }
 324
 325 static int char_size(struct thread_data *td, struct fio_file *f)
 326 {
 327 #ifdef FIO_HAVE_CHARDEV_SIZE
 328         unsigned long long bytes = 0;
 329         int r;
 330
 331         if (td->io_ops->open_file(td, f)) {
 332                 log_err("fio: failed opening blockdev %s for size check\n",
 333                         f->file_name);
 334                 return 1;
 335         }
 336
 337         r = chardev_size(f, &bytes);
 338         if (r) {
 339                 td_verror(td, r, "chardev_size");
 340                 goto err;
 341         }
 342
 343         if (!bytes) {
 344                 log_err("%s: zero sized char device?\n", f->file_name);
 345                 goto err;
 346         }
 347
 348         f->real_file_size = bytes;
 349         td->io_ops->close_file(td, f);
 350         return 0;
 351 err:
 352         td->io_ops->close_file(td, f);
 353         return 1;
 354 #else
 355         f->real_file_size = -1ULL;
 356         return 0;
 357 #endif
 358 }
 359
 360 static int get_file_size(struct thread_data *td, struct fio_file *f)
 361 {
 362         int ret = 0;
 363
 364         if (fio_file_size_known(f))
 365                 return 0;
 366
 367         if (f->filetype == FIO_TYPE_FILE)
 368                 ret = file_size(td, f);
 369         else if (f->filetype == FIO_TYPE_BD)
 370                 ret = bdev_size(td, f);
 371         else if (f->filetype == FIO_TYPE_CHAR)
 372                 ret = char_size(td, f);
 373         else
 374                 f->real_file_size = -1;
 375
 376         if (ret)
 377                 return ret;
 378
 379         if (f->file_offset > f->real_file_size) {
 380                 log_err("%s: offset extends end (%llu > %llu)\n", td->o.name,
 381                                         (unsigned long long) f->file_offset,
 382                                         (unsigned long long) f->real_file_size);
 383                 return 1;
 384         }
 385
 386         fio_file_set_size_known(f);
 387         return 0;
 388 }
 389
 390 static int __file_invalidate_cache(struct thread_data *td, struct fio_file *f,
 391                                    unsigned long long off,
 392                                    unsigned long long len)
 393 {
 394         int errval = 0, ret = 0;
 395
 396 #ifdef CONFIG_ESX
 397         return 0;
 398 #endif
 399
 400         if (len == -1ULL)
 401                 len = f->io_size;
 402         if (off == -1ULL)
 403                 off = f->file_offset;
 404
 405         if (len == -1ULL || off == -1ULL)
 406                 return 0;
 407
 408         dprint(FD_IO, "invalidate cache %s: %llu/%llu\n", f->file_name, off,
 409                                                                 len);
 410
 411         if (td->io_ops->invalidate) {
 412                 ret = td->io_ops->invalidate(td, f);
 413                 if (ret < 0)
 414                         errval = ret;
 415         } else if (f->filetype == FIO_TYPE_FILE) {
 416                 ret = posix_fadvise(f->fd, off, len, POSIX_FADV_DONTNEED);
 417                 if (ret)
 418                         errval = ret;
 419         } else if (f->filetype == FIO_TYPE_BD) {
 420                 int retry_count = 0;
 421
 422                 ret = blockdev_invalidate_cache(f);
 423                 while (ret < 0 && errno == EAGAIN && retry_count++ < 25) {
 424                         /*
 425                          * Linux multipath devices reject ioctl while
 426                          * the maps are being updated. That window can
 427                          * last tens of milliseconds; we'll try up to
 428                          * a quarter of a second.
 429                          */
 430                         usleep(10000);
 431                         ret = blockdev_invalidate_cache(f);
 432                 }
 433                 if (ret < 0 && errno == EACCES && geteuid()) {
 434                         if (!root_warn) {
 435                                 log_err("fio: only root may flush block "
 436                                         "devices. Cache flush bypassed!\n");
 437                                 root_warn = 1;
 438                         }
 439                         ret = 0;
 440                 }
 441                 if (ret < 0)
 442                         errval = errno;
 443         } else if (f->filetype == FIO_TYPE_CHAR || f->filetype == FIO_TYPE_PIPE)
 444                 ret = 0;
 445
 446         /*
 447          * Cache flushing isn't a fatal condition, and we know it will
 448          * happen on some platforms where we don't have the proper
 449          * function to flush eg block device caches. So just warn and
 450          * continue on our way.
 451          */
 452         if (errval)
 453                 log_info("fio: cache invalidation of %s failed: %s\n", f->file_name, strerror(errval));
 454
 455         return 0;
 456
 457 }
 458
 459 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
 460 {
 461         if (!fio_file_open(f))
 462                 return 0;
 463
 464         return __file_invalidate_cache(td, f, -1ULL, -1ULL);
 465 }
 466
 467 int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
 468 {
 469         int ret = 0;
 470
 471         dprint(FD_FILE, "fd close %s\n", f->file_name);
 472
 473         remove_file_hash(f);
 474
 475         if (close(f->fd) < 0)
 476                 ret = errno;
 477
 478         f->fd = -1;
 479
 480         if (f->shadow_fd != -1) {
 481                 close(f->shadow_fd);
 482                 f->shadow_fd = -1;
 483         }
 484
 485         f->engine_data = 0;
 486         return ret;
 487 }
 488
 489 int file_lookup_open(struct fio_file *f, int flags)
 490 {
 491         struct fio_file *__f;
 492         int from_hash;
 493
 494         __f = lookup_file_hash(f->file_name);
 495         if (__f) {
 496                 dprint(FD_FILE, "found file in hash %s\n", f->file_name);
 497                 /*
 498                  * racy, need the __f->lock locked
 499                  */
 500                 f->lock = __f->lock;
 501                 from_hash = 1;
 502         } else {
 503                 dprint(FD_FILE, "file not found in hash %s\n", f->file_name);
 504                 from_hash = 0;
 505         }
 506
 507 #ifdef WIN32
 508         flags |= _O_BINARY;
 509 #endif
 510
 511         f->fd = open(f->file_name, flags, 0600);
 512         return from_hash;
 513 }
 514
 515 static int file_close_shadow_fds(struct thread_data *td)
 516 {
 517         struct fio_file *f;
 518         int num_closed = 0;
 519         unsigned int i;
 520
 521         for_each_file(td, f, i) {
 522                 if (f->shadow_fd == -1)
 523                         continue;
 524
 525                 close(f->shadow_fd);
 526                 f->shadow_fd = -1;
 527                 num_closed++;
 528         }
 529
 530         return num_closed;
 531 }
 532
 533 int generic_open_file(struct thread_data *td, struct fio_file *f)
 534 {
 535         int is_std = 0;
 536         int flags = 0;
 537         int from_hash = 0;
 538
 539         dprint(FD_FILE, "fd open %s\n", f->file_name);
 540
 541         if (!strcmp(f->file_name, "-")) {
 542                 if (td_rw(td)) {
 543                         log_err("fio: can't read/write to stdin/out\n");
 544                         return 1;
 545                 }
 546                 is_std = 1;
 547
 548                 /*
 549                  * move output logging to stderr, if we are writing to stdout
 550                  */
 551                 if (td_write(td))
 552                         f_out = stderr;
 553         }
 554
 555         if (td_trim(td))
 556                 goto skip_flags;
 557         if (td->o.odirect)
 558                 flags |= OS_O_DIRECT;
 559         if (td->o.oatomic) {
 560                 if (!FIO_O_ATOMIC) {
 561                         td_verror(td, EINVAL, "OS does not support atomic IO");
 562                         return 1;
 563                 }
 564                 flags |= OS_O_DIRECT | FIO_O_ATOMIC;
 565         }
 566         if (td->o.sync_io)
 567                 flags |= O_SYNC;
 568         if (td->o.create_on_open && td->o.allow_create)
 569                 flags |= O_CREAT;
 570 skip_flags:
 571         if (f->filetype != FIO_TYPE_FILE)
 572                 flags |= FIO_O_NOATIME;
 573
 574 open_again:
 575         if (td_write(td)) {
 576                 if (!read_only)
 577                         flags |= O_RDWR;
 578
 579                 if (f->filetype == FIO_TYPE_FILE && td->o.allow_create)
 580                         flags |= O_CREAT;
 581
 582                 if (is_std)
 583                         f->fd = dup(STDOUT_FILENO);
 584                 else
 585                         from_hash = file_lookup_open(f, flags);
 586         } else if (td_read(td)) {
 587                 if (f->filetype == FIO_TYPE_CHAR && !read_only)
 588                         flags |= O_RDWR;
 589                 else
 590                         flags |= O_RDONLY;
 591
 592                 if (is_std)
 593                         f->fd = dup(STDIN_FILENO);
 594                 else
 595                         from_hash = file_lookup_open(f, flags);
 596         } else { //td trim
 597                 flags |= O_RDWR;
 598                 from_hash = file_lookup_open(f, flags);
 599         }
 600
 601         if (f->fd == -1) {
 602                 char buf[FIO_VERROR_SIZE];
 603                 int __e = errno;
 604
 605                 if (__e == EPERM && (flags & FIO_O_NOATIME)) {
 606                         flags &= ~FIO_O_NOATIME;
 607                         goto open_again;
 608                 }
 609                 if (__e == EMFILE && file_close_shadow_fds(td))
 610                         goto open_again;
 611
 612                 snprintf(buf, sizeof(buf), "open(%s)", f->file_name);
 613
 614                 if (__e == EINVAL && (flags & OS_O_DIRECT)) {
 615                         log_err("fio: looks like your file system does not " \
 616                                 "support direct=1/buffered=0\n");
 617                 }
 618
 619                 td_verror(td, __e, buf);
 620                 return 1;
 621         }
 622
 623         if (!from_hash && f->fd != -1) {
 624                 if (add_file_hash(f)) {
 625                         int fio_unused ret;
 626
 627                         /*
 628                          * Stash away descriptor for later close. This is to
 629                          * work-around a "feature" on Linux, where a close of
 630                          * an fd that has been opened for write will trigger
 631                          * udev to call blkid to check partitions, fs id, etc.
 632                          * That pollutes the device cache, which can slow down
 633                          * unbuffered accesses.
 634                          */
 635                         if (f->shadow_fd == -1)
 636                                 f->shadow_fd = f->fd;
 637                         else {
 638                                 /*
 639                                  * OK to ignore, we haven't done anything
 640                                  * with it
 641                                  */
 642                                 ret = generic_close_file(td, f);
 643                         }
 644                         goto open_again;
 645                 }
 646         }
 647
 648         return 0;
 649 }
 650
 651 int generic_get_file_size(struct thread_data *td, struct fio_file *f)
 652 {
 653         return get_file_size(td, f);
 654 }
 655
 656 /*
 657  * open/close all files, so that ->real_file_size gets set
 658  */
 659 static int get_file_sizes(struct thread_data *td)
 660 {
 661         struct fio_file *f;
 662         unsigned int i;
 663         int err = 0;
 664
 665         for_each_file(td, f, i) {
 666                 dprint(FD_FILE, "get file size for %p/%d/%p\n", f, i,
 667                                                                 f->file_name);
 668
 669                 if (td_io_get_file_size(td, f)) {
 670                         if (td->error != ENOENT) {
 671                                 log_err("%s\n", td->verror);
 672                                 err = 1;
 673                                 break;
 674                         }
 675                         clear_error(td);
 676                 }
 677
 678                 if (f->real_file_size == -1ULL && td->o.size)
 679                         f->real_file_size = td->o.size / td->o.nr_files;
 680         }
 681
 682         return err;
 683 }
 684
 685 struct fio_mount {
 686         struct flist_head list;
 687         const char *base;
 688         char __base[256];
 689         unsigned int key;
 690 };
 691
 692 /*
 693  * Get free number of bytes for each file on each unique mount.
 694  */
 695 static unsigned long long get_fs_free_counts(struct thread_data *td)
 696 {
 697         struct flist_head *n, *tmp;
 698         unsigned long long ret = 0;
 699         struct fio_mount *fm;
 700         FLIST_HEAD(list);
 701         struct fio_file *f;
 702         unsigned int i;
 703
 704         for_each_file(td, f, i) {
 705                 struct stat sb;
 706                 char buf[256];
 707
 708                 if (f->filetype == FIO_TYPE_BD || f->filetype == FIO_TYPE_CHAR) {
 709                         if (f->real_file_size != -1ULL)
 710                                 ret += f->real_file_size;
 711                         continue;
 712                 } else if (f->filetype != FIO_TYPE_FILE)
 713                         continue;
 714
 715                 buf[255] = '\0';
 716                 strncpy(buf, f->file_name, 255);
 717
 718                 if (stat(buf, &sb) < 0) {
 719                         if (errno != ENOENT)
 720                                 break;
 721                         strcpy(buf, ".");
 722                         if (stat(buf, &sb) < 0)
 723                                 break;
 724                 }
 725
 726                 fm = NULL;
 727                 flist_for_each(n, &list) {
 728                         fm = flist_entry(n, struct fio_mount, list);
 729                         if (fm->key == sb.st_dev)
 730                                 break;
 731
 732                         fm = NULL;
 733                 }
 734
 735                 if (fm)
 736                         continue;
 737
 738                 fm = calloc(1, sizeof(*fm));
 739                 strncpy(fm->__base, buf, sizeof(fm->__base) - 1);
 740                 fm->base = basename(fm->__base);
 741                 fm->key = sb.st_dev;
 742                 flist_add(&fm->list, &list);
 743         }
 744
 745         flist_for_each_safe(n, tmp, &list) {
 746                 unsigned long long sz;
 747
 748                 fm = flist_entry(n, struct fio_mount, list);
 749                 flist_del(&fm->list);
 750
 751                 sz = get_fs_free_size(fm->base);
 752                 if (sz && sz != -1ULL)
 753                         ret += sz;
 754
 755                 free(fm);
 756         }
 757
 758         return ret;
 759 }
 760
 761 uint64_t get_start_offset(struct thread_data *td, struct fio_file *f)
 762 {
 763         struct thread_options *o = &td->o;
 764         uint64_t offset;
 765
 766         if (o->file_append && f->filetype == FIO_TYPE_FILE)
 767                 return f->real_file_size;
 768
 769         offset = td->o.start_offset + td->subjob_number * td->o.offset_increment;
 770         if (offset % td_max_bs(td))
 771                 offset -= (offset % td_max_bs(td));
 772
 773         return offset;
 774 }
 775
 776 /*
 777  * Open the files and setup files sizes, creating files if necessary.
 778  */
 779 int setup_files(struct thread_data *td)
 780 {
 781         unsigned long long total_size, extend_size;
 782         struct thread_options *o = &td->o;
 783         struct fio_file *f;
 784         unsigned int i, nr_fs_extra = 0;
 785         int err = 0, need_extend;
 786         int old_state;
 787         const unsigned int bs = td_min_bs(td);
 788         uint64_t fs = 0;
 789
 790         dprint(FD_FILE, "setup files\n");
 791
 792         old_state = td_bump_runstate(td, TD_SETTING_UP);
 793
 794         if (o->read_iolog_file)
 795                 goto done;
 796
 797         /*
 798          * if ioengine defines a setup() method, it's responsible for
 799          * opening the files and setting f->real_file_size to indicate
 800          * the valid range for that file.
 801          */
 802         if (td->io_ops->setup)
 803                 err = td->io_ops->setup(td);
 804         else
 805                 err = get_file_sizes(td);
 806
 807         if (err)
 808                 goto err_out;
 809
 810         /*
 811          * check sizes. if the files/devices do not exist and the size
 812          * isn't passed to fio, abort.
 813          */
 814         total_size = 0;
 815         for_each_file(td, f, i) {
 816                 f->fileno = i;
 817                 if (f->real_file_size == -1ULL)
 818                         total_size = -1ULL;
 819                 else
 820                         total_size += f->real_file_size;
 821         }
 822
 823         if (o->fill_device)
 824                 td->fill_device_size = get_fs_free_counts(td);
 825
 826         /*
 827          * device/file sizes are zero and no size given, punt
 828          */
 829         if ((!total_size || total_size == -1ULL) && !o->size &&
 830             !(td->io_ops->flags & FIO_NOIO) && !o->fill_device &&
 831             !(o->nr_files && (o->file_size_low || o->file_size_high))) {
 832                 log_err("%s: you need to specify size=\n", o->name);
 833                 td_verror(td, EINVAL, "total_file_size");
 834                 goto err_out;
 835         }
 836
 837         /*
 838          * Calculate per-file size and potential extra size for the
 839          * first files, if needed.
 840          */
 841         if (!o->file_size_low && o->nr_files) {
 842                 uint64_t all_fs;
 843
 844                 fs = o->size / o->nr_files;
 845                 all_fs = fs * o->nr_files;
 846
 847                 if (all_fs < o->size)
 848                         nr_fs_extra = (o->size - all_fs) / bs;
 849         }
 850
 851         /*
 852          * now file sizes are known, so we can set ->io_size. if size= is
 853          * not given, ->io_size is just equal to ->real_file_size. if size
 854          * is given, ->io_size is size / nr_files.
 855          */
 856         extend_size = total_size = 0;
 857         need_extend = 0;
 858         for_each_file(td, f, i) {
 859                 f->file_offset = get_start_offset(td, f);
 860
 861                 if (!o->file_size_low) {
 862                         /*
 863                          * no file size range given, file size is equal to
 864                          * total size divided by number of files. If that is
 865                          * zero, set it to the real file size. If the size
 866                          * doesn't divide nicely with the min blocksize,
 867                          * make the first files bigger.
 868                          */
 869                         f->io_size = fs;
 870                         if (nr_fs_extra) {
 871                                 nr_fs_extra--;
 872                                 f->io_size += bs;
 873                         }
 874
 875                         if (!f->io_size)
 876                                 f->io_size = f->real_file_size - f->file_offset;
 877                 } else if (f->real_file_size < o->file_size_low ||
 878                            f->real_file_size > o->file_size_high) {
 879                         if (f->file_offset > o->file_size_low)
 880                                 goto err_offset;
 881                         /*
 882                          * file size given. if it's fixed, use that. if it's a
 883                          * range, generate a random size in-between.
 884                          */
 885                         if (o->file_size_low == o->file_size_high)
 886                                 f->io_size = o->file_size_low - f->file_offset;
 887                         else {
 888                                 f->io_size = get_rand_file_size(td)
 889                                                 - f->file_offset;
 890                         }
 891                 } else
 892                         f->io_size = f->real_file_size - f->file_offset;
 893
 894                 if (f->io_size == -1ULL)
 895                         total_size = -1ULL;
 896                 else {
 897                         if (o->size_percent) {
 898                                 f->io_size = (f->io_size * o->size_percent) / 100;
 899                                 f->io_size -= (f->io_size % td_min_bs(td));
 900                         }
 901                         total_size += f->io_size;
 902                 }
 903
 904                 if (f->filetype == FIO_TYPE_FILE &&
 905                     (f->io_size + f->file_offset) > f->real_file_size &&
 906                     !(td->io_ops->flags & FIO_DISKLESSIO)) {
 907                         if (!o->create_on_open) {
 908                                 need_extend++;
 909                                 extend_size += (f->io_size + f->file_offset);
 910                         } else
 911                                 f->real_file_size = f->io_size + f->file_offset;
 912                         fio_file_set_extend(f);
 913                 }
 914         }
 915
 916         if (td->o.block_error_hist) {
 917                 int len;
 918
 919                 assert(td->o.nr_files == 1);    /* checked in fixup_options */
 920                 f = td->files[0];
 921                 len = f->io_size / td->o.bs[DDIR_TRIM];
 922                 if (len > MAX_NR_BLOCK_INFOS || len <= 0) {
 923                         log_err("fio: cannot calculate block histogram with "
 924                                 "%d trim blocks, maximum %d\n",
 925                                 len, MAX_NR_BLOCK_INFOS);
 926                         td_verror(td, EINVAL, "block_error_hist");
 927                         goto err_out;
 928                 }
 929
 930                 td->ts.nr_block_infos = len;
 931                 for (i = 0; i < len; i++)
 932                         td->ts.block_infos[i] =
 933                                 BLOCK_INFO(0, BLOCK_STATE_UNINIT);
 934         } else
 935                 td->ts.nr_block_infos = 0;
 936
 937         if (!o->size || (total_size && o->size > total_size))
 938                 o->size = total_size;
 939
 940         if (o->size < td_min_bs(td)) {
 941                 log_err("fio: blocksize too large for data set\n");
 942                 goto err_out;
 943         }
 944
 945         /*
 946          * See if we need to extend some files
 947          */
 948         if (need_extend) {
 949                 temp_stall_ts = 1;
 950                 if (output_format & FIO_OUTPUT_NORMAL)
 951                         log_info("%s: Laying out IO file(s) (%u file(s) /"
 952                                  " %lluMB)\n", o->name, need_extend,
 953                                         extend_size >> 20);
 954
 955                 for_each_file(td, f, i) {
 956                         unsigned long long old_len = -1ULL, extend_len = -1ULL;
 957
 958                         if (!fio_file_extend(f))
 959                                 continue;
 960
 961                         assert(f->filetype == FIO_TYPE_FILE);
 962                         fio_file_clear_extend(f);
 963                         if (!o->fill_device) {
 964                                 old_len = f->real_file_size;
 965                                 extend_len = f->io_size + f->file_offset -
 966                                                 old_len;
 967                         }
 968                         f->real_file_size = (f->io_size + f->file_offset);
 969                         err = extend_file(td, f);
 970                         if (err)
 971                                 break;
 972
 973                         err = __file_invalidate_cache(td, f, old_len,
 974                                                                 extend_len);
 975
 976                         /*
 977                          * Shut up static checker
 978                          */
 979                         if (f->fd != -1)
 980                                 close(f->fd);
 981
 982                         f->fd = -1;
 983                         if (err)
 984                                 break;
 985                 }
 986                 temp_stall_ts = 0;
 987         }
 988
 989         if (err)
 990                 goto err_out;
 991
 992         if (!o->zone_size)
 993                 o->zone_size = o->size;
 994
 995         /*
 996          * iolog already set the total io size, if we read back
 997          * stored entries.
 998          */
 999         if (!o->read_iolog_file) {
1000                 if (o->io_limit)
1001                         td->total_io_size = o->io_limit * o->loops;
1002                 else
1003                         td->total_io_size = o->size * o->loops;
1004         }
1005
1006 done:
1007         if (o->create_only)
1008                 td->done = 1;
1009
1010         td_restore_runstate(td, old_state);
1011         return 0;
1012 err_offset:
1013         log_err("%s: you need to specify valid offset=\n", o->name);
1014 err_out:
1015         td_restore_runstate(td, old_state);
1016         return 1;
1017 }
1018
1019 int pre_read_files(struct thread_data *td)
1020 {
1021         struct fio_file *f;
1022         unsigned int i;
1023
1024         dprint(FD_FILE, "pre_read files\n");
1025
1026         for_each_file(td, f, i) {
1027                 pre_read_file(td, f);
1028         }
1029
1030         return 1;
1031 }
1032
1033 static int __init_rand_distribution(struct thread_data *td, struct fio_file *f)
1034 {
1035         unsigned int range_size, seed;
1036         unsigned long nranges;
1037         uint64_t fsize;
1038
1039         range_size = min(td->o.min_bs[DDIR_READ], td->o.min_bs[DDIR_WRITE]);
1040         fsize = min(f->real_file_size, f->io_size);
1041
1042         nranges = (fsize + range_size - 1) / range_size;
1043
1044         seed = jhash(f->file_name, strlen(f->file_name), 0) * td->thread_number;
1045         if (!td->o.rand_repeatable)
1046                 seed = td->rand_seeds[4];
1047
1048         if (td->o.random_distribution == FIO_RAND_DIST_ZIPF)
1049                 zipf_init(&f->zipf, nranges, td->o.zipf_theta.u.f, seed);
1050         else if (td->o.random_distribution == FIO_RAND_DIST_PARETO)
1051                 pareto_init(&f->zipf, nranges, td->o.pareto_h.u.f, seed);
1052         else if (td->o.random_distribution == FIO_RAND_DIST_GAUSS)
1053                 gauss_init(&f->gauss, nranges, td->o.gauss_dev.u.f, seed);
1054
1055         return 1;
1056 }
1057
1058 static int init_rand_distribution(struct thread_data *td)
1059 {
1060         struct fio_file *f;
1061         unsigned int i;
1062         int state;
1063
1064         if (td->o.random_distribution == FIO_RAND_DIST_RANDOM)
1065                 return 0;
1066
1067         state = td_bump_runstate(td, TD_SETTING_UP);
1068
1069         for_each_file(td, f, i)
1070                 __init_rand_distribution(td, f);
1071
1072         td_restore_runstate(td, state);
1073
1074         return 1;
1075 }
1076
1077 /*
1078  * Check if the number of blocks exceeds the randomness capability of
1079  * the selected generator. Tausworthe is 32-bit, the others are fullly
1080  * 64-bit capable.
1081  */
1082 static int check_rand_gen_limits(struct thread_data *td, struct fio_file *f,
1083                                  uint64_t blocks)
1084 {
1085         if (blocks <= FRAND32_MAX)
1086                 return 0;
1087         if (td->o.random_generator != FIO_RAND_GEN_TAUSWORTHE)
1088                 return 0;
1089
1090         /*
1091          * If the user hasn't specified a random generator, switch
1092          * to tausworthe64 with informational warning. If the user did
1093          * specify one, just warn.
1094          */
1095         log_info("fio: file %s exceeds 32-bit tausworthe random generator.\n",
1096                         f->file_name);
1097
1098         if (!fio_option_is_set(&td->o, random_generator)) {
1099                 log_info("fio: Switching to tausworthe64. Use the "
1100                          "random_generator= option to get rid of this "
1101                          " warning.\n");
1102                 td->o.random_generator = FIO_RAND_GEN_TAUSWORTHE64;
1103                 return 0;
1104         }
1105
1106         /*
1107          * Just make this information to avoid breaking scripts.
1108          */
1109         log_info("fio: Use the random_generator= option to switch to lfsr or "
1110                          "tausworthe64.\n");
1111         return 0;
1112 }
1113
1114 int init_random_map(struct thread_data *td)
1115 {
1116         unsigned long long blocks;
1117         struct fio_file *f;
1118         unsigned int i;
1119
1120         if (init_rand_distribution(td))
1121                 return 0;
1122         if (!td_random(td))
1123                 return 0;
1124
1125         for_each_file(td, f, i) {
1126                 uint64_t fsize = min(f->real_file_size, f->io_size);
1127
1128                 blocks = fsize / (unsigned long long) td->o.rw_min_bs;
1129
1130                 if (check_rand_gen_limits(td, f, blocks))
1131                         return 1;
1132
1133                 if (td->o.random_generator == FIO_RAND_GEN_LFSR) {
1134                         unsigned long seed;
1135
1136                         seed = td->rand_seeds[FIO_RAND_BLOCK_OFF];
1137
1138                         if (!lfsr_init(&f->lfsr, blocks, seed, 0)) {
1139                                 fio_file_set_lfsr(f);
1140                                 continue;
1141                         }
1142                 } else if (!td->o.norandommap) {
1143                         f->io_axmap = axmap_new(blocks);
1144                         if (f->io_axmap) {
1145                                 fio_file_set_axmap(f);
1146                                 continue;
1147                         }
1148                 } else if (td->o.norandommap)
1149                         continue;
1150
1151                 if (!td->o.softrandommap) {
1152                         log_err("fio: failed allocating random map. If running"
1153                                 " a large number of jobs, try the 'norandommap'"
1154                                 " option or set 'softrandommap'. Or give"
1155                                 " a larger --alloc-size to fio.\n");
1156                         return 1;
1157                 }
1158
1159                 log_info("fio: file %s failed allocating random map. Running "
1160                          "job without.\n", f->file_name);
1161         }
1162
1163         return 0;
1164 }
1165
1166 void close_files(struct thread_data *td)
1167 {
1168         struct fio_file *f;
1169         unsigned int i;
1170
1171         for_each_file(td, f, i) {
1172                 if (fio_file_open(f))
1173                         td_io_close_file(td, f);
1174         }
1175 }
1176
1177 void close_and_free_files(struct thread_data *td)
1178 {
1179         struct fio_file *f;
1180         unsigned int i;
1181
1182         dprint(FD_FILE, "close files\n");
1183
1184         for_each_file(td, f, i) {
1185                 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
1186                         dprint(FD_FILE, "free unlink %s\n", f->file_name);
1187                         td_io_unlink_file(td, f);
1188                 }
1189
1190                 if (fio_file_open(f))
1191                         td_io_close_file(td, f);
1192
1193                 remove_file_hash(f);
1194
1195                 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
1196                         dprint(FD_FILE, "free unlink %s\n", f->file_name);
1197                         td_io_unlink_file(td, f);
1198                 }
1199
1200                 sfree(f->file_name);
1201                 f->file_name = NULL;
1202                 if (fio_file_axmap(f)) {
1203                         axmap_free(f->io_axmap);
1204                         f->io_axmap = NULL;
1205                 }
1206                 sfree(f);
1207         }
1208
1209         td->o.filename = NULL;
1210         free(td->files);
1211         free(td->file_locks);
1212         td->files_index = 0;
1213         td->files = NULL;
1214         td->file_locks = NULL;
1215         td->o.file_lock_mode = FILE_LOCK_NONE;
1216         td->o.nr_files = 0;
1217 }
1218
1219 static void get_file_type(struct fio_file *f)
1220 {
1221         struct stat sb;
1222
1223         if (!strcmp(f->file_name, "-"))
1224                 f->filetype = FIO_TYPE_PIPE;
1225         else
1226                 f->filetype = FIO_TYPE_FILE;
1227
1228         /* \\.\ is the device namespace in Windows, where every file is
1229          * a block device */
1230         if (strncmp(f->file_name, "\\\\.\\", 4) == 0)
1231                 f->filetype = FIO_TYPE_BD;
1232
1233         if (!stat(f->file_name, &sb)) {
1234                 if (S_ISBLK(sb.st_mode))
1235                         f->filetype = FIO_TYPE_BD;
1236                 else if (S_ISCHR(sb.st_mode))
1237                         f->filetype = FIO_TYPE_CHAR;
1238                 else if (S_ISFIFO(sb.st_mode))
1239                         f->filetype = FIO_TYPE_PIPE;
1240         }
1241 }
1242
1243 static int __is_already_allocated(const char *fname)
1244 {
1245         struct flist_head *entry;
1246         char *filename;
1247
1248         if (flist_empty(&filename_list))
1249                 return 0;
1250
1251         flist_for_each(entry, &filename_list) {
1252                 filename = flist_entry(entry, struct file_name, list)->filename;
1253
1254                 if (strcmp(filename, fname) == 0)
1255                         return 1;
1256         }
1257
1258         return 0;
1259 }
1260
1261 static int is_already_allocated(const char *fname)
1262 {
1263         int ret;
1264
1265         fio_file_hash_lock();
1266         ret = __is_already_allocated(fname);
1267         fio_file_hash_unlock();
1268         return ret;
1269 }
1270
1271 static void set_already_allocated(const char *fname)
1272 {
1273         struct file_name *fn;
1274
1275         fn = malloc(sizeof(struct file_name));
1276         fn->filename = strdup(fname);
1277
1278         fio_file_hash_lock();
1279         if (!__is_already_allocated(fname)) {
1280                 flist_add_tail(&fn->list, &filename_list);
1281                 fn = NULL;
1282         }
1283         fio_file_hash_unlock();
1284
1285         if (fn) {
1286                 free(fn->filename);
1287                 free(fn);
1288         }
1289 }
1290
1291
1292 static void free_already_allocated(void)
1293 {
1294         struct flist_head *entry, *tmp;
1295         struct file_name *fn;
1296
1297         if (flist_empty(&filename_list))
1298                 return;
1299
1300         fio_file_hash_lock();
1301         flist_for_each_safe(entry, tmp, &filename_list) {
1302                 fn = flist_entry(entry, struct file_name, list);
1303                 free(fn->filename);
1304                 flist_del(&fn->list);
1305                 free(fn);
1306         }
1307
1308         fio_file_hash_unlock();
1309 }
1310
1311 static struct fio_file *alloc_new_file(struct thread_data *td)
1312 {
1313         struct fio_file *f;
1314
1315         f = smalloc(sizeof(*f));
1316         if (!f) {
1317                 log_err("fio: smalloc OOM\n");
1318                 assert(0);
1319                 return NULL;
1320         }
1321
1322         f->fd = -1;
1323         f->shadow_fd = -1;
1324         fio_file_reset(td, f);
1325         return f;
1326 }
1327
1328 int add_file(struct thread_data *td, const char *fname, int numjob, int inc)
1329 {
1330         int cur_files = td->files_index;
1331         char file_name[PATH_MAX];
1332         struct fio_file *f;
1333         int len = 0;
1334
1335         dprint(FD_FILE, "add file %s\n", fname);
1336
1337         if (td->o.directory)
1338                 len = set_name_idx(file_name, PATH_MAX, td->o.directory, numjob,
1339                                         td->o.unique_filename);
1340
1341         sprintf(file_name + len, "%s", fname);
1342
1343         /* clean cloned siblings using existing files */
1344         if (numjob && is_already_allocated(file_name))
1345                 return 0;
1346
1347         f = alloc_new_file(td);
1348
1349         if (td->files_size <= td->files_index) {
1350                 unsigned int new_size = td->o.nr_files + 1;
1351
1352                 dprint(FD_FILE, "resize file array to %d files\n", new_size);
1353
1354                 td->files = realloc(td->files, new_size * sizeof(f));
1355                 if (td->files == NULL) {
1356                         log_err("fio: realloc OOM\n");
1357                         assert(0);
1358                 }
1359                 if (td->o.file_lock_mode != FILE_LOCK_NONE) {
1360                         td->file_locks = realloc(td->file_locks, new_size);
1361                         if (!td->file_locks) {
1362                                 log_err("fio: realloc OOM\n");
1363                                 assert(0);
1364                         }
1365                         td->file_locks[cur_files] = FILE_LOCK_NONE;
1366                 }
1367                 td->files_size = new_size;
1368         }
1369         td->files[cur_files] = f;
1370         f->fileno = cur_files;
1371
1372         /*
1373          * init function, io engine may not be loaded yet
1374          */
1375         if (td->io_ops && (td->io_ops->flags & FIO_DISKLESSIO))
1376                 f->real_file_size = -1ULL;
1377
1378         f->file_name = smalloc_strdup(file_name);
1379         if (!f->file_name) {
1380                 log_err("fio: smalloc OOM\n");
1381                 assert(0);
1382         }
1383
1384         get_file_type(f);
1385
1386         switch (td->o.file_lock_mode) {
1387         case FILE_LOCK_NONE:
1388                 break;
1389         case FILE_LOCK_READWRITE:
1390                 f->rwlock = fio_rwlock_init();
1391                 break;
1392         case FILE_LOCK_EXCLUSIVE:
1393                 f->lock = fio_mutex_init(FIO_MUTEX_UNLOCKED);
1394                 break;
1395         default:
1396                 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
1397                 assert(0);
1398         }
1399
1400         td->files_index++;
1401         if (f->filetype == FIO_TYPE_FILE)
1402                 td->nr_normal_files++;
1403
1404         set_already_allocated(file_name);
1405
1406         if (inc)
1407                 td->o.nr_files++;
1408
1409         dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name,
1410                                                         cur_files);
1411
1412         return cur_files;
1413 }
1414
1415 int add_file_exclusive(struct thread_data *td, const char *fname)
1416 {
1417         struct fio_file *f;
1418         unsigned int i;
1419
1420         for_each_file(td, f, i) {
1421                 if (!strcmp(f->file_name, fname))
1422                         return i;
1423         }
1424
1425         return add_file(td, fname, 0, 1);
1426 }
1427
1428 void get_file(struct fio_file *f)
1429 {
1430         dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
1431         assert(fio_file_open(f));
1432         f->references++;
1433 }
1434
1435 int put_file(struct thread_data *td, struct fio_file *f)
1436 {
1437         int f_ret = 0, ret = 0;
1438
1439         dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
1440
1441         if (!fio_file_open(f)) {
1442                 assert(f->fd == -1);
1443                 return 0;
1444         }
1445
1446         assert(f->references);
1447         if (--f->references)
1448                 return 0;
1449
1450         if (should_fsync(td) && td->o.fsync_on_close) {
1451                 f_ret = fsync(f->fd);
1452                 if (f_ret < 0)
1453                         f_ret = errno;
1454         }
1455
1456         if (td->io_ops->close_file)
1457                 ret = td->io_ops->close_file(td, f);
1458
1459         if (!ret)
1460                 ret = f_ret;
1461
1462         td->nr_open_files--;
1463         fio_file_clear_open(f);
1464         assert(f->fd == -1);
1465         return ret;
1466 }
1467
1468 void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
1469 {
1470         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1471                 return;
1472
1473         if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
1474                 if (ddir == DDIR_READ)
1475                         fio_rwlock_read(f->rwlock);
1476                 else
1477                         fio_rwlock_write(f->rwlock);
1478         } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1479                 fio_mutex_down(f->lock);
1480
1481         td->file_locks[f->fileno] = td->o.file_lock_mode;
1482 }
1483
1484 void unlock_file(struct thread_data *td, struct fio_file *f)
1485 {
1486         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1487                 return;
1488
1489         if (td->o.file_lock_mode == FILE_LOCK_READWRITE)
1490                 fio_rwlock_unlock(f->rwlock);
1491         else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1492                 fio_mutex_up(f->lock);
1493
1494         td->file_locks[f->fileno] = FILE_LOCK_NONE;
1495 }
1496
1497 void unlock_file_all(struct thread_data *td, struct fio_file *f)
1498 {
1499         if (td->o.file_lock_mode == FILE_LOCK_NONE || !td->file_locks)
1500                 return;
1501         if (td->file_locks[f->fileno] != FILE_LOCK_NONE)
1502                 unlock_file(td, f);
1503 }
1504
1505 static int recurse_dir(struct thread_data *td, const char *dirname)
1506 {
1507         struct dirent *dir;
1508         int ret = 0;
1509         DIR *D;
1510
1511         D = opendir(dirname);
1512         if (!D) {
1513                 char buf[FIO_VERROR_SIZE];
1514
1515                 snprintf(buf, FIO_VERROR_SIZE, "opendir(%s)", dirname);
1516                 td_verror(td, errno, buf);
1517                 return 1;
1518         }
1519
1520         while ((dir = readdir(D)) != NULL) {
1521                 char full_path[PATH_MAX];
1522                 struct stat sb;
1523
1524                 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
1525                         continue;
1526
1527                 sprintf(full_path, "%s%s%s", dirname, FIO_OS_PATH_SEPARATOR, dir->d_name);
1528
1529                 if (lstat(full_path, &sb) == -1) {
1530                         if (errno != ENOENT) {
1531                                 td_verror(td, errno, "stat");
1532                                 ret = 1;
1533                                 break;
1534                         }
1535                 }
1536
1537                 if (S_ISREG(sb.st_mode)) {
1538                         add_file(td, full_path, 0, 1);
1539                         continue;
1540                 }
1541                 if (!S_ISDIR(sb.st_mode))
1542                         continue;
1543
1544                 ret = recurse_dir(td, full_path);
1545                 if (ret)
1546                         break;
1547         }
1548
1549         closedir(D);
1550         return ret;
1551 }
1552
1553 int add_dir_files(struct thread_data *td, const char *path)
1554 {
1555         int ret = recurse_dir(td, path);
1556
1557         if (!ret)
1558                 log_info("fio: opendir added %d files\n", td->o.nr_files);
1559
1560         return ret;
1561 }
1562
1563 void dup_files(struct thread_data *td, struct thread_data *org)
1564 {
1565         struct fio_file *f;
1566         unsigned int i;
1567
1568         dprint(FD_FILE, "dup files: %d\n", org->files_index);
1569
1570         if (!org->files)
1571                 return;
1572
1573         td->files = malloc(org->files_index * sizeof(f));
1574
1575         if (td->o.file_lock_mode != FILE_LOCK_NONE)
1576                 td->file_locks = malloc(org->files_index);
1577
1578         for_each_file(org, f, i) {
1579                 struct fio_file *__f;
1580
1581                 __f = alloc_new_file(td);
1582
1583                 if (f->file_name) {
1584                         __f->file_name = smalloc_strdup(f->file_name);
1585                         if (!__f->file_name) {
1586                                 log_err("fio: smalloc OOM\n");
1587                                 assert(0);
1588                         }
1589
1590                         __f->filetype = f->filetype;
1591                 }
1592
1593                 if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1594                         __f->lock = f->lock;
1595                 else if (td->o.file_lock_mode == FILE_LOCK_READWRITE)
1596                         __f->rwlock = f->rwlock;
1597
1598                 td->files[i] = __f;
1599         }
1600 }
1601
1602 /*
1603  * Returns the index that matches the filename, or -1 if not there
1604  */
1605 int get_fileno(struct thread_data *td, const char *fname)
1606 {
1607         struct fio_file *f;
1608         unsigned int i;
1609
1610         for_each_file(td, f, i)
1611                 if (!strcmp(f->file_name, fname))
1612                         return i;
1613
1614         return -1;
1615 }
1616
1617 /*
1618  * For log usage, where we add/open/close files automatically
1619  */
1620 void free_release_files(struct thread_data *td)
1621 {
1622         close_files(td);
1623         td->o.nr_files = 0;
1624         td->o.open_files = 0;
1625         td->files_index = 0;
1626         td->nr_normal_files = 0;
1627 }
1628
1629 void fio_file_reset(struct thread_data *td, struct fio_file *f)
1630 {
1631         int i;
1632
1633         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1634                 f->last_pos[i] = f->file_offset;
1635                 f->last_start[i] = -1ULL;
1636         }
1637
1638         if (fio_file_axmap(f))
1639                 axmap_reset(f->io_axmap);
1640         else if (fio_file_lfsr(f))
1641                 lfsr_reset(&f->lfsr, td->rand_seeds[FIO_RAND_BLOCK_OFF]);
1642 }
1643
1644 int fio_files_done(struct thread_data *td)
1645 {
1646         struct fio_file *f;
1647         unsigned int i;
1648
1649         for_each_file(td, f, i)
1650                 if (!fio_file_done(f))
1651                         return 0;
1652
1653         return 1;
1654 }
1655
1656 /* free memory used in initialization phase only */
1657 void filesetup_mem_free(void)
1658 {
1659         free_already_allocated();
1660 }