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_ioengine_flagged(td, 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                 int ret;
  62
  63                 dprint(FD_FILE, "layout unlink %s\n", f->file_name);
  64
  65                 ret = td_io_unlink_file(td, f);
  66                 if (ret != 0 && ret != ENOENT) {
  67                         td_verror(td, errno, "unlink");
  68                         return 1;
  69                 }
  70         }
  71
  72         flags = O_WRONLY;
  73         if (td->o.allow_create)
  74                 flags |= O_CREAT;
  75         if (new_layout)
  76                 flags |= O_TRUNC;
  77
  78 #ifdef WIN32
  79         flags |= _O_BINARY;
  80 #endif
  81
  82         dprint(FD_FILE, "open file %s, flags %x\n", f->file_name, flags);
  83         f->fd = open(f->file_name, flags, 0644);
  84         if (f->fd < 0) {
  85                 int err = errno;
  86
  87                 if (err == ENOENT && !td->o.allow_create)
  88                         log_err("fio: file creation disallowed by "
  89                                         "allow_file_create=0\n");
  90                 else
  91                         td_verror(td, err, "open");
  92                 return 1;
  93         }
  94
  95 #ifdef CONFIG_POSIX_FALLOCATE
  96         if (!td->o.fill_device) {
  97                 switch (td->o.fallocate_mode) {
  98                 case FIO_FALLOCATE_NONE:
  99                         break;
 100                 case FIO_FALLOCATE_POSIX:
 101                         dprint(FD_FILE, "posix_fallocate file %s size %llu\n",
 102                                  f->file_name,
 103                                  (unsigned long long) f->real_file_size);
 104
 105                         r = posix_fallocate(f->fd, 0, f->real_file_size);
 106                         if (r > 0) {
 107                                 log_err("fio: posix_fallocate fails: %s\n",
 108                                                 strerror(r));
 109                         }
 110                         break;
 111 #ifdef CONFIG_LINUX_FALLOCATE
 112                 case FIO_FALLOCATE_KEEP_SIZE:
 113                         dprint(FD_FILE,
 114                                 "fallocate(FALLOC_FL_KEEP_SIZE) "
 115                                 "file %s size %llu\n", f->file_name,
 116                                 (unsigned long long) f->real_file_size);
 117
 118                         r = fallocate(f->fd, FALLOC_FL_KEEP_SIZE, 0,
 119                                         f->real_file_size);
 120                         if (r != 0)
 121                                 td_verror(td, errno, "fallocate");
 122
 123                         break;
 124 #endif /* CONFIG_LINUX_FALLOCATE */
 125                 default:
 126                         log_err("fio: unknown fallocate mode: %d\n",
 127                                 td->o.fallocate_mode);
 128                         assert(0);
 129                 }
 130         }
 131 #endif /* CONFIG_POSIX_FALLOCATE */
 132
 133         /*
 134          * If our jobs don't require regular files initially, we're done.
 135          */
 136         if (!new_layout)
 137                 goto done;
 138
 139         /*
 140          * The size will be -1ULL when fill_device is used, so don't truncate
 141          * or fallocate this file, just write it
 142          */
 143         if (!td->o.fill_device) {
 144                 dprint(FD_FILE, "truncate file %s, size %llu\n", f->file_name,
 145                                         (unsigned long long) f->real_file_size);
 146                 if (ftruncate(f->fd, f->real_file_size) == -1) {
 147                         if (errno != EFBIG) {
 148                                 td_verror(td, errno, "ftruncate");
 149                                 goto err;
 150                         }
 151                 }
 152         }
 153
 154         b = malloc(td->o.max_bs[DDIR_WRITE]);
 155
 156         left = f->real_file_size;
 157         while (left && !td->terminate) {
 158                 bs = td->o.max_bs[DDIR_WRITE];
 159                 if (bs > left)
 160                         bs = left;
 161
 162                 fill_io_buffer(td, b, bs, bs);
 163
 164                 r = write(f->fd, b, bs);
 165
 166                 if (r > 0) {
 167                         left -= r;
 168                         continue;
 169                 } else {
 170                         if (r < 0) {
 171                                 int __e = errno;
 172
 173                                 if (__e == ENOSPC) {
 174                                         if (td->o.fill_device)
 175                                                 break;
 176                                         log_info("fio: ENOSPC on laying out "
 177                                                  "file, stopping\n");
 178                                         break;
 179                                 }
 180                                 td_verror(td, errno, "write");
 181                         } else
 182                                 td_verror(td, EIO, "write");
 183
 184                         break;
 185                 }
 186         }
 187
 188         if (td->terminate) {
 189                 dprint(FD_FILE, "terminate unlink %s\n", f->file_name);
 190                 td_io_unlink_file(td, f);
 191         } else if (td->o.create_fsync) {
 192                 if (fsync(f->fd) < 0) {
 193                         td_verror(td, errno, "fsync");
 194                         goto err;
 195                 }
 196         }
 197         if (td->o.fill_device && !td_write(td)) {
 198                 fio_file_clear_size_known(f);
 199                 if (td_io_get_file_size(td, f))
 200                         goto err;
 201                 if (f->io_size > f->real_file_size)
 202                         f->io_size = f->real_file_size;
 203         }
 204
 205         free(b);
 206 done:
 207         return 0;
 208 err:
 209         close(f->fd);
 210         f->fd = -1;
 211         if (b)
 212                 free(b);
 213         return 1;
 214 }
 215
 216 static int pre_read_file(struct thread_data *td, struct fio_file *f)
 217 {
 218         int ret = 0, r, did_open = 0, old_runstate;
 219         unsigned long long left;
 220         unsigned int bs;
 221         char *b;
 222
 223         if (td_ioengine_flagged(td, FIO_PIPEIO))
 224                 return 0;
 225
 226         if (!fio_file_open(f)) {
 227                 if (td->io_ops->open_file(td, f)) {
 228                         log_err("fio: cannot pre-read, failed to open file\n");
 229                         return 1;
 230                 }
 231                 did_open = 1;
 232         }
 233
 234         old_runstate = td_bump_runstate(td, TD_PRE_READING);
 235
 236         bs = td->o.max_bs[DDIR_READ];
 237         b = malloc(bs);
 238         memset(b, 0, bs);
 239
 240         if (lseek(f->fd, f->file_offset, SEEK_SET) < 0) {
 241                 td_verror(td, errno, "lseek");
 242                 log_err("fio: failed to lseek pre-read file\n");
 243                 ret = 1;
 244                 goto error;
 245         }
 246
 247         left = f->io_size;
 248
 249         while (left && !td->terminate) {
 250                 if (bs > left)
 251                         bs = left;
 252
 253                 r = read(f->fd, b, bs);
 254
 255                 if (r == (int) bs) {
 256                         left -= bs;
 257                         continue;
 258                 } else {
 259                         td_verror(td, EIO, "pre_read");
 260                         break;
 261                 }
 262         }
 263
 264 error:
 265         td_restore_runstate(td, old_runstate);
 266
 267         if (did_open)
 268                 td->io_ops->close_file(td, f);
 269
 270         free(b);
 271         return ret;
 272 }
 273
 274 unsigned long long get_rand_file_size(struct thread_data *td)
 275 {
 276         unsigned long long ret, sized;
 277         uint64_t frand_max;
 278         unsigned long r;
 279
 280         frand_max = rand_max(&td->file_size_state);
 281         r = __rand(&td->file_size_state);
 282         sized = td->o.file_size_high - td->o.file_size_low;
 283         ret = (unsigned long long) ((double) sized * (r / (frand_max + 1.0)));
 284         ret += td->o.file_size_low;
 285         ret -= (ret % td->o.rw_min_bs);
 286         return ret;
 287 }
 288
 289 static int file_size(struct thread_data *td, struct fio_file *f)
 290 {
 291         struct stat st;
 292
 293         if (stat(f->file_name, &st) == -1) {
 294                 td_verror(td, errno, "fstat");
 295                 return 1;
 296         }
 297
 298         f->real_file_size = st.st_size;
 299         return 0;
 300 }
 301
 302 static int bdev_size(struct thread_data *td, struct fio_file *f)
 303 {
 304         unsigned long long bytes = 0;
 305         int r;
 306
 307         if (td->io_ops->open_file(td, f)) {
 308                 log_err("fio: failed opening blockdev %s for size check\n",
 309                         f->file_name);
 310                 return 1;
 311         }
 312
 313         r = blockdev_size(f, &bytes);
 314         if (r) {
 315                 td_verror(td, r, "blockdev_size");
 316                 goto err;
 317         }
 318
 319         if (!bytes) {
 320                 log_err("%s: zero sized block device?\n", f->file_name);
 321                 goto err;
 322         }
 323
 324         f->real_file_size = bytes;
 325         td->io_ops->close_file(td, f);
 326         return 0;
 327 err:
 328         td->io_ops->close_file(td, f);
 329         return 1;
 330 }
 331
 332 static int char_size(struct thread_data *td, struct fio_file *f)
 333 {
 334 #ifdef FIO_HAVE_CHARDEV_SIZE
 335         unsigned long long bytes = 0;
 336         int r;
 337
 338         if (td->io_ops->open_file(td, f)) {
 339                 log_err("fio: failed opening chardev %s for size check\n",
 340                         f->file_name);
 341                 return 1;
 342         }
 343
 344         r = chardev_size(f, &bytes);
 345         if (r) {
 346                 td_verror(td, r, "chardev_size");
 347                 goto err;
 348         }
 349
 350         if (!bytes) {
 351                 log_err("%s: zero sized char device?\n", f->file_name);
 352                 goto err;
 353         }
 354
 355         f->real_file_size = bytes;
 356         td->io_ops->close_file(td, f);
 357         return 0;
 358 err:
 359         td->io_ops->close_file(td, f);
 360         return 1;
 361 #else
 362         f->real_file_size = -1ULL;
 363         return 0;
 364 #endif
 365 }
 366
 367 static int get_file_size(struct thread_data *td, struct fio_file *f)
 368 {
 369         int ret = 0;
 370
 371         if (fio_file_size_known(f))
 372                 return 0;
 373
 374         if (f->filetype == FIO_TYPE_FILE)
 375                 ret = file_size(td, f);
 376         else if (f->filetype == FIO_TYPE_BLOCK)
 377                 ret = bdev_size(td, f);
 378         else if (f->filetype == FIO_TYPE_CHAR)
 379                 ret = char_size(td, f);
 380         else
 381                 f->real_file_size = -1ULL;
 382
 383         /*
 384          * Leave ->real_file_size with 0 since it could be expectation
 385          * of initial setup for regular files.
 386          */
 387         if (ret)
 388                 return ret;
 389
 390         /*
 391          * If ->real_file_size is -1, a conditional for the message
 392          * "offset extends end" is always true, but it makes no sense,
 393          * so just return the same value here.
 394          */
 395         if (f->real_file_size == -1ULL) {
 396                 log_info("%s: failed to get file size of %s\n", td->o.name,
 397                                         f->file_name);
 398                 return 1;
 399         }
 400
 401         if (td->o.start_offset && f->file_offset == 0)
 402                 dprint(FD_FILE, "offset of file %s not initialized yet\n",
 403                                         f->file_name);
 404         /*
 405          * ->file_offset normally hasn't been initialized yet, so this
 406          * is basically always false.
 407          */
 408         if (f->file_offset > f->real_file_size) {
 409                 log_err("%s: offset extends end (%llu > %llu)\n", td->o.name,
 410                                         (unsigned long long) f->file_offset,
 411                                         (unsigned long long) f->real_file_size);
 412                 return 1;
 413         }
 414
 415         fio_file_set_size_known(f);
 416         return 0;
 417 }
 418
 419 static int __file_invalidate_cache(struct thread_data *td, struct fio_file *f,
 420                                    unsigned long long off,
 421                                    unsigned long long len)
 422 {
 423         int errval = 0, ret = 0;
 424
 425 #ifdef CONFIG_ESX
 426         return 0;
 427 #endif
 428
 429         if (len == -1ULL)
 430                 len = f->io_size;
 431         if (off == -1ULL)
 432                 off = f->file_offset;
 433
 434         if (len == -1ULL || off == -1ULL)
 435                 return 0;
 436
 437         dprint(FD_IO, "invalidate cache %s: %llu/%llu\n", f->file_name, off,
 438                                                                 len);
 439
 440         if (td->io_ops->invalidate) {
 441                 ret = td->io_ops->invalidate(td, f);
 442                 if (ret < 0)
 443                         errval = ret;
 444         } else if (f->filetype == FIO_TYPE_FILE) {
 445                 ret = posix_fadvise(f->fd, off, len, POSIX_FADV_DONTNEED);
 446                 if (ret)
 447                         errval = ret;
 448         } else if (f->filetype == FIO_TYPE_BLOCK) {
 449                 int retry_count = 0;
 450
 451                 ret = blockdev_invalidate_cache(f);
 452                 while (ret < 0 && errno == EAGAIN && retry_count++ < 25) {
 453                         /*
 454                          * Linux multipath devices reject ioctl while
 455                          * the maps are being updated. That window can
 456                          * last tens of milliseconds; we'll try up to
 457                          * a quarter of a second.
 458                          */
 459                         usleep(10000);
 460                         ret = blockdev_invalidate_cache(f);
 461                 }
 462                 if (ret < 0 && errno == EACCES && geteuid()) {
 463                         if (!root_warn) {
 464                                 log_err("fio: only root may flush block "
 465                                         "devices. Cache flush bypassed!\n");
 466                                 root_warn = 1;
 467                         }
 468                         ret = 0;
 469                 }
 470                 if (ret < 0)
 471                         errval = errno;
 472         } else if (f->filetype == FIO_TYPE_CHAR || f->filetype == FIO_TYPE_PIPE)
 473                 ret = 0;
 474
 475         /*
 476          * Cache flushing isn't a fatal condition, and we know it will
 477          * happen on some platforms where we don't have the proper
 478          * function to flush eg block device caches. So just warn and
 479          * continue on our way.
 480          */
 481         if (errval)
 482                 log_info("fio: cache invalidation of %s failed: %s\n", f->file_name, strerror(errval));
 483
 484         return 0;
 485
 486 }
 487
 488 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
 489 {
 490         if (!fio_file_open(f))
 491                 return 0;
 492
 493         return __file_invalidate_cache(td, f, -1ULL, -1ULL);
 494 }
 495
 496 int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
 497 {
 498         int ret = 0;
 499
 500         dprint(FD_FILE, "fd close %s\n", f->file_name);
 501
 502         remove_file_hash(f);
 503
 504         if (close(f->fd) < 0)
 505                 ret = errno;
 506
 507         f->fd = -1;
 508
 509         if (f->shadow_fd != -1) {
 510                 close(f->shadow_fd);
 511                 f->shadow_fd = -1;
 512         }
 513
 514         f->engine_data = 0;
 515         return ret;
 516 }
 517
 518 int file_lookup_open(struct fio_file *f, int flags)
 519 {
 520         struct fio_file *__f;
 521         int from_hash;
 522
 523         __f = lookup_file_hash(f->file_name);
 524         if (__f) {
 525                 dprint(FD_FILE, "found file in hash %s\n", f->file_name);
 526                 f->lock = __f->lock;
 527                 from_hash = 1;
 528         } else {
 529                 dprint(FD_FILE, "file not found in hash %s\n", f->file_name);
 530                 from_hash = 0;
 531         }
 532
 533 #ifdef WIN32
 534         flags |= _O_BINARY;
 535 #endif
 536
 537         f->fd = open(f->file_name, flags, 0600);
 538         return from_hash;
 539 }
 540
 541 static int file_close_shadow_fds(struct thread_data *td)
 542 {
 543         struct fio_file *f;
 544         int num_closed = 0;
 545         unsigned int i;
 546
 547         for_each_file(td, f, i) {
 548                 if (f->shadow_fd == -1)
 549                         continue;
 550
 551                 close(f->shadow_fd);
 552                 f->shadow_fd = -1;
 553                 num_closed++;
 554         }
 555
 556         return num_closed;
 557 }
 558
 559 int generic_open_file(struct thread_data *td, struct fio_file *f)
 560 {
 561         int is_std = 0;
 562         int flags = 0;
 563         int from_hash = 0;
 564
 565         dprint(FD_FILE, "fd open %s\n", f->file_name);
 566
 567         if (!strcmp(f->file_name, "-")) {
 568                 if (td_rw(td)) {
 569                         log_err("fio: can't read/write to stdin/out\n");
 570                         return 1;
 571                 }
 572                 is_std = 1;
 573
 574                 /*
 575                  * move output logging to stderr, if we are writing to stdout
 576                  */
 577                 if (td_write(td))
 578                         f_out = stderr;
 579         }
 580
 581         if (td_trim(td))
 582                 goto skip_flags;
 583         if (td->o.odirect)
 584                 flags |= OS_O_DIRECT;
 585         if (td->o.oatomic) {
 586                 if (!FIO_O_ATOMIC) {
 587                         td_verror(td, EINVAL, "OS does not support atomic IO");
 588                         return 1;
 589                 }
 590                 flags |= OS_O_DIRECT | FIO_O_ATOMIC;
 591         }
 592         if (td->o.sync_io)
 593                 flags |= O_SYNC;
 594         if (td->o.create_on_open && td->o.allow_create)
 595                 flags |= O_CREAT;
 596 skip_flags:
 597         if (f->filetype != FIO_TYPE_FILE)
 598                 flags |= FIO_O_NOATIME;
 599
 600 open_again:
 601         if (td_write(td)) {
 602                 if (!read_only)
 603                         flags |= O_RDWR;
 604
 605                 if (f->filetype == FIO_TYPE_FILE && td->o.allow_create)
 606                         flags |= O_CREAT;
 607
 608                 if (is_std)
 609                         f->fd = dup(STDOUT_FILENO);
 610                 else
 611                         from_hash = file_lookup_open(f, flags);
 612         } else if (td_read(td)) {
 613                 if (f->filetype == FIO_TYPE_CHAR && !read_only)
 614                         flags |= O_RDWR;
 615                 else
 616                         flags |= O_RDONLY;
 617
 618                 if (is_std)
 619                         f->fd = dup(STDIN_FILENO);
 620                 else
 621                         from_hash = file_lookup_open(f, flags);
 622         } else if (td_trim(td)) {
 623                 assert(!td_rw(td)); /* should have matched above */
 624                 flags |= O_RDWR;
 625                 from_hash = file_lookup_open(f, flags);
 626         }
 627
 628         if (f->fd == -1) {
 629                 char buf[FIO_VERROR_SIZE];
 630                 int __e = errno;
 631
 632                 if (__e == EPERM && (flags & FIO_O_NOATIME)) {
 633                         flags &= ~FIO_O_NOATIME;
 634                         goto open_again;
 635                 }
 636                 if (__e == EMFILE && file_close_shadow_fds(td))
 637                         goto open_again;
 638
 639                 snprintf(buf, sizeof(buf), "open(%s)", f->file_name);
 640
 641                 if (__e == EINVAL && (flags & OS_O_DIRECT)) {
 642                         log_err("fio: looks like your file system does not " \
 643                                 "support direct=1/buffered=0\n");
 644                 }
 645
 646                 td_verror(td, __e, buf);
 647                 return 1;
 648         }
 649
 650         if (!from_hash && f->fd != -1) {
 651                 if (add_file_hash(f)) {
 652                         int fio_unused ret;
 653
 654                         /*
 655                          * Stash away descriptor for later close. This is to
 656                          * work-around a "feature" on Linux, where a close of
 657                          * an fd that has been opened for write will trigger
 658                          * udev to call blkid to check partitions, fs id, etc.
 659                          * That pollutes the device cache, which can slow down
 660                          * unbuffered accesses.
 661                          */
 662                         if (f->shadow_fd == -1)
 663                                 f->shadow_fd = f->fd;
 664                         else {
 665                                 /*
 666                                  * OK to ignore, we haven't done anything
 667                                  * with it
 668                                  */
 669                                 ret = generic_close_file(td, f);
 670                         }
 671                         goto open_again;
 672                 }
 673         }
 674
 675         return 0;
 676 }
 677
 678 /*
 679  * This function i.e. get_file_size() is the default .get_file_size
 680  * implementation of majority of I/O engines.
 681  */
 682 int generic_get_file_size(struct thread_data *td, struct fio_file *f)
 683 {
 684         return get_file_size(td, f);
 685 }
 686
 687 /*
 688  * open/close all files, so that ->real_file_size gets set
 689  */
 690 static int get_file_sizes(struct thread_data *td)
 691 {
 692         struct fio_file *f;
 693         unsigned int i;
 694         int err = 0;
 695
 696         for_each_file(td, f, i) {
 697                 dprint(FD_FILE, "get file size for %p/%d/%s\n", f, i,
 698                                                                 f->file_name);
 699
 700                 if (td_io_get_file_size(td, f)) {
 701                         if (td->error != ENOENT) {
 702                                 log_err("%s\n", td->verror);
 703                                 err = 1;
 704                                 break;
 705                         }
 706                         clear_error(td);
 707                 }
 708
 709                 /*
 710                  * There are corner cases where we end up with -1 for
 711                  * ->real_file_size due to unsupported file type, etc.
 712                  * We then just set to size option value divided by number
 713                  * of files, similar to the way file ->io_size is set.
 714                  * stat(2) failure doesn't set ->real_file_size to -1.
 715                  */
 716                 if (f->real_file_size == -1ULL && td->o.size)
 717                         f->real_file_size = td->o.size / td->o.nr_files;
 718         }
 719
 720         return err;
 721 }
 722
 723 struct fio_mount {
 724         struct flist_head list;
 725         const char *base;
 726         char __base[256];
 727         unsigned int key;
 728 };
 729
 730 /*
 731  * Get free number of bytes for each file on each unique mount.
 732  */
 733 static unsigned long long get_fs_free_counts(struct thread_data *td)
 734 {
 735         struct flist_head *n, *tmp;
 736         unsigned long long ret = 0;
 737         struct fio_mount *fm;
 738         FLIST_HEAD(list);
 739         struct fio_file *f;
 740         unsigned int i;
 741
 742         for_each_file(td, f, i) {
 743                 struct stat sb;
 744                 char buf[256];
 745
 746                 if (f->filetype == FIO_TYPE_BLOCK || f->filetype == FIO_TYPE_CHAR) {
 747                         if (f->real_file_size != -1ULL)
 748                                 ret += f->real_file_size;
 749                         continue;
 750                 } else if (f->filetype != FIO_TYPE_FILE)
 751                         continue;
 752
 753                 buf[255] = '\0';
 754                 strncpy(buf, f->file_name, 255);
 755
 756                 if (stat(buf, &sb) < 0) {
 757                         if (errno != ENOENT)
 758                                 break;
 759                         strcpy(buf, ".");
 760                         if (stat(buf, &sb) < 0)
 761                                 break;
 762                 }
 763
 764                 fm = NULL;
 765                 flist_for_each(n, &list) {
 766                         fm = flist_entry(n, struct fio_mount, list);
 767                         if (fm->key == sb.st_dev)
 768                                 break;
 769
 770                         fm = NULL;
 771                 }
 772
 773                 if (fm)
 774                         continue;
 775
 776                 fm = calloc(1, sizeof(*fm));
 777                 strncpy(fm->__base, buf, sizeof(fm->__base) - 1);
 778                 fm->base = basename(fm->__base);
 779                 fm->key = sb.st_dev;
 780                 flist_add(&fm->list, &list);
 781         }
 782
 783         flist_for_each_safe(n, tmp, &list) {
 784                 unsigned long long sz;
 785
 786                 fm = flist_entry(n, struct fio_mount, list);
 787                 flist_del(&fm->list);
 788
 789                 sz = get_fs_free_size(fm->base);
 790                 if (sz && sz != -1ULL)
 791                         ret += sz;
 792
 793                 free(fm);
 794         }
 795
 796         return ret;
 797 }
 798
 799 uint64_t get_start_offset(struct thread_data *td, struct fio_file *f)
 800 {
 801         struct thread_options *o = &td->o;
 802
 803         if (o->file_append && f->filetype == FIO_TYPE_FILE)
 804                 return f->real_file_size;
 805
 806         return td->o.start_offset +
 807                 td->subjob_number * td->o.offset_increment;
 808 }
 809
 810 /*
 811  * Open the files and setup files sizes, creating files if necessary.
 812  */
 813 int setup_files(struct thread_data *td)
 814 {
 815         unsigned long long total_size, extend_size;
 816         struct thread_options *o = &td->o;
 817         struct fio_file *f;
 818         unsigned int i, nr_fs_extra = 0;
 819         int err = 0, need_extend;
 820         int old_state;
 821         const unsigned int bs = td_min_bs(td);
 822         uint64_t fs = 0;
 823
 824         dprint(FD_FILE, "setup files\n");
 825
 826         old_state = td_bump_runstate(td, TD_SETTING_UP);
 827
 828         if (o->read_iolog_file)
 829                 goto done;
 830
 831         /*
 832          * Find out physical size of files or devices for this thread,
 833          * before we determine I/O size and range of our targets.
 834          * If ioengine defines a setup() method, it's responsible for
 835          * opening the files and setting f->real_file_size to indicate
 836          * the valid range for that file.
 837          */
 838         if (td->io_ops->setup)
 839                 err = td->io_ops->setup(td);
 840         else
 841                 err = get_file_sizes(td);
 842
 843         if (err)
 844                 goto err_out;
 845
 846         /*
 847          * check sizes. if the files/devices do not exist and the size
 848          * isn't passed to fio, abort.
 849          */
 850         total_size = 0;
 851         for_each_file(td, f, i) {
 852                 f->fileno = i;
 853                 if (f->real_file_size == -1ULL)
 854                         total_size = -1ULL;
 855                 else
 856                         total_size += f->real_file_size;
 857         }
 858
 859         if (o->fill_device)
 860                 td->fill_device_size = get_fs_free_counts(td);
 861
 862         /*
 863          * device/file sizes are zero and no size given, punt
 864          */
 865         if ((!total_size || total_size == -1ULL) && !o->size &&
 866             !td_ioengine_flagged(td, FIO_NOIO) && !o->fill_device &&
 867             !(o->nr_files && (o->file_size_low || o->file_size_high))) {
 868                 log_err("%s: you need to specify size=\n", o->name);
 869                 td_verror(td, EINVAL, "total_file_size");
 870                 goto err_out;
 871         }
 872
 873         /*
 874          * Calculate per-file size and potential extra size for the
 875          * first files, if needed (i.e. if we don't have a fixed size).
 876          */
 877         if (!o->file_size_low && o->nr_files) {
 878                 uint64_t all_fs;
 879
 880                 fs = o->size / o->nr_files;
 881                 all_fs = fs * o->nr_files;
 882
 883                 if (all_fs < o->size)
 884                         nr_fs_extra = (o->size - all_fs) / bs;
 885         }
 886
 887         /*
 888          * now file sizes are known, so we can set ->io_size. if size= is
 889          * not given, ->io_size is just equal to ->real_file_size. if size
 890          * is given, ->io_size is size / nr_files.
 891          */
 892         extend_size = total_size = 0;
 893         need_extend = 0;
 894         for_each_file(td, f, i) {
 895                 f->file_offset = get_start_offset(td, f);
 896
 897                 /*
 898                  * Update ->io_size depending on options specified.
 899                  * ->file_size_low being 0 means filesize option isn't set.
 900                  * Non zero ->file_size_low equals ->file_size_high means
 901                  * filesize option is set in a fixed size format.
 902                  * Non zero ->file_size_low not equals ->file_size_high means
 903                  * filesize option is set in a range format.
 904                  */
 905                 if (!o->file_size_low) {
 906                         /*
 907                          * no file size or range given, file size is equal to
 908                          * total size divided by number of files. If the size
 909                          * doesn't divide nicely with the min blocksize,
 910                          * make the first files bigger.
 911                          */
 912                         f->io_size = fs;
 913                         if (nr_fs_extra) {
 914                                 nr_fs_extra--;
 915                                 f->io_size += bs;
 916                         }
 917
 918                         /*
 919                          * We normally don't come here, but if the result is 0,
 920                          * set it to the real file size. This could be size of
 921                          * the existing one if it already exists, but otherwise
 922                          * will be set to 0. A new file won't be created because
 923                          * ->io_size + ->file_offset equals ->real_file_size.
 924                          */
 925                         if (!f->io_size) {
 926                                 if (f->file_offset > f->real_file_size)
 927                                         goto err_offset;
 928                                 f->io_size = f->real_file_size - f->file_offset;
 929                                 log_info("fio: forcing file %s size to %llu\n",
 930                                         f->file_name,
 931                                         (unsigned long long)f->io_size);
 932                                 if (!f->io_size)
 933                                         log_info("fio: file %s may be ignored\n",
 934                                                 f->file_name);
 935                         }
 936                 } else if (f->real_file_size < o->file_size_low ||
 937                            f->real_file_size > o->file_size_high) {
 938                         if (f->file_offset > o->file_size_low)
 939                                 goto err_offset;
 940                         /*
 941                          * file size given. if it's fixed, use that. if it's a
 942                          * range, generate a random size in-between.
 943                          */
 944                         if (o->file_size_low == o->file_size_high)
 945                                 f->io_size = o->file_size_low - f->file_offset;
 946                         else {
 947                                 f->io_size = get_rand_file_size(td)
 948                                                 - f->file_offset;
 949                         }
 950                 } else
 951                         f->io_size = f->real_file_size - f->file_offset;
 952
 953                 if (f->io_size == -1ULL)
 954                         total_size = -1ULL;
 955                 else {
 956                         if (o->size_percent) {
 957                                 f->io_size = (f->io_size * o->size_percent) / 100;
 958                                 f->io_size -= (f->io_size % td_min_bs(td));
 959                         }
 960                         total_size += f->io_size;
 961                 }
 962
 963                 if (f->filetype == FIO_TYPE_FILE &&
 964                     (f->io_size + f->file_offset) > f->real_file_size &&
 965                     !td_ioengine_flagged(td, FIO_DISKLESSIO)) {
 966                         if (!o->create_on_open) {
 967                                 need_extend++;
 968                                 extend_size += (f->io_size + f->file_offset);
 969                         } else
 970                                 f->real_file_size = f->io_size + f->file_offset;
 971                         fio_file_set_extend(f);
 972                 }
 973         }
 974
 975         if (td->o.block_error_hist) {
 976                 int len;
 977
 978                 assert(td->o.nr_files == 1);    /* checked in fixup_options */
 979                 f = td->files[0];
 980                 len = f->io_size / td->o.bs[DDIR_TRIM];
 981                 if (len > MAX_NR_BLOCK_INFOS || len <= 0) {
 982                         log_err("fio: cannot calculate block histogram with "
 983                                 "%d trim blocks, maximum %d\n",
 984                                 len, MAX_NR_BLOCK_INFOS);
 985                         td_verror(td, EINVAL, "block_error_hist");
 986                         goto err_out;
 987                 }
 988
 989                 td->ts.nr_block_infos = len;
 990                 for (i = 0; i < len; i++)
 991                         td->ts.block_infos[i] =
 992                                 BLOCK_INFO(0, BLOCK_STATE_UNINIT);
 993         } else
 994                 td->ts.nr_block_infos = 0;
 995
 996         if (!o->size || (total_size && o->size > total_size))
 997                 o->size = total_size;
 998
 999         if (o->size < td_min_bs(td)) {
1000                 log_err("fio: blocksize too large for data set\n");
1001                 goto err_out;
1002         }
1003
1004         /*
1005          * See if we need to extend some files, typically needed when our
1006          * target regular files don't exist yet, but our jobs require them
1007          * initially due to read I/Os.
1008          */
1009         if (need_extend) {
1010                 temp_stall_ts = 1;
1011                 if (output_format & FIO_OUTPUT_NORMAL)
1012                         log_info("%s: Laying out IO file(s) (%u file(s) / %lluMiB)\n",
1013                                  o->name, need_extend, extend_size >> 20);
1014
1015                 for_each_file(td, f, i) {
1016                         unsigned long long old_len = -1ULL, extend_len = -1ULL;
1017
1018                         if (!fio_file_extend(f))
1019                                 continue;
1020
1021                         assert(f->filetype == FIO_TYPE_FILE);
1022                         fio_file_clear_extend(f);
1023                         if (!o->fill_device) {
1024                                 old_len = f->real_file_size;
1025                                 extend_len = f->io_size + f->file_offset -
1026                                                 old_len;
1027                         }
1028                         f->real_file_size = (f->io_size + f->file_offset);
1029                         err = extend_file(td, f);
1030                         if (err)
1031                                 break;
1032
1033                         err = __file_invalidate_cache(td, f, old_len,
1034                                                                 extend_len);
1035
1036                         /*
1037                          * Shut up static checker
1038                          */
1039                         if (f->fd != -1)
1040                                 close(f->fd);
1041
1042                         f->fd = -1;
1043                         if (err)
1044                                 break;
1045                 }
1046                 temp_stall_ts = 0;
1047         }
1048
1049         if (err)
1050                 goto err_out;
1051
1052         if (!o->zone_size)
1053                 o->zone_size = o->size;
1054
1055         /*
1056          * iolog already set the total io size, if we read back
1057          * stored entries.
1058          */
1059         if (!o->read_iolog_file) {
1060                 if (o->io_size)
1061                         td->total_io_size = o->io_size * o->loops;
1062                 else
1063                         td->total_io_size = o->size * o->loops;
1064         }
1065
1066 done:
1067         if (o->create_only)
1068                 td->done = 1;
1069
1070         td_restore_runstate(td, old_state);
1071         return 0;
1072 err_offset:
1073         log_err("%s: you need to specify valid offset=\n", o->name);
1074 err_out:
1075         td_restore_runstate(td, old_state);
1076         return 1;
1077 }
1078
1079 int pre_read_files(struct thread_data *td)
1080 {
1081         struct fio_file *f;
1082         unsigned int i;
1083
1084         dprint(FD_FILE, "pre_read files\n");
1085
1086         for_each_file(td, f, i) {
1087                 pre_read_file(td, f);
1088         }
1089
1090         return 1;
1091 }
1092
1093 static int __init_rand_distribution(struct thread_data *td, struct fio_file *f)
1094 {
1095         unsigned int range_size, seed;
1096         unsigned long nranges;
1097         uint64_t fsize;
1098
1099         range_size = min(td->o.min_bs[DDIR_READ], td->o.min_bs[DDIR_WRITE]);
1100         fsize = min(f->real_file_size, f->io_size);
1101
1102         nranges = (fsize + range_size - 1) / range_size;
1103
1104         seed = jhash(f->file_name, strlen(f->file_name), 0) * td->thread_number;
1105         if (!td->o.rand_repeatable)
1106                 seed = td->rand_seeds[4];
1107
1108         if (td->o.random_distribution == FIO_RAND_DIST_ZIPF)
1109                 zipf_init(&f->zipf, nranges, td->o.zipf_theta.u.f, seed);
1110         else if (td->o.random_distribution == FIO_RAND_DIST_PARETO)
1111                 pareto_init(&f->zipf, nranges, td->o.pareto_h.u.f, seed);
1112         else if (td->o.random_distribution == FIO_RAND_DIST_GAUSS)
1113                 gauss_init(&f->gauss, nranges, td->o.gauss_dev.u.f, seed);
1114
1115         return 1;
1116 }
1117
1118 static int init_rand_distribution(struct thread_data *td)
1119 {
1120         struct fio_file *f;
1121         unsigned int i;
1122         int state;
1123
1124         if (td->o.random_distribution == FIO_RAND_DIST_RANDOM)
1125                 return 0;
1126
1127         state = td_bump_runstate(td, TD_SETTING_UP);
1128
1129         for_each_file(td, f, i)
1130                 __init_rand_distribution(td, f);
1131
1132         td_restore_runstate(td, state);
1133
1134         return 1;
1135 }
1136
1137 /*
1138  * Check if the number of blocks exceeds the randomness capability of
1139  * the selected generator. Tausworthe is 32-bit, the others are fullly
1140  * 64-bit capable.
1141  */
1142 static int check_rand_gen_limits(struct thread_data *td, struct fio_file *f,
1143                                  uint64_t blocks)
1144 {
1145         if (blocks <= FRAND32_MAX)
1146                 return 0;
1147         if (td->o.random_generator != FIO_RAND_GEN_TAUSWORTHE)
1148                 return 0;
1149
1150         /*
1151          * If the user hasn't specified a random generator, switch
1152          * to tausworthe64 with informational warning. If the user did
1153          * specify one, just warn.
1154          */
1155         log_info("fio: file %s exceeds 32-bit tausworthe random generator.\n",
1156                         f->file_name);
1157
1158         if (!fio_option_is_set(&td->o, random_generator)) {
1159                 log_info("fio: Switching to tausworthe64. Use the "
1160                          "random_generator= option to get rid of this "
1161                          "warning.\n");
1162                 td->o.random_generator = FIO_RAND_GEN_TAUSWORTHE64;
1163                 return 0;
1164         }
1165
1166         /*
1167          * Just make this information to avoid breaking scripts.
1168          */
1169         log_info("fio: Use the random_generator= option to switch to lfsr or "
1170                          "tausworthe64.\n");
1171         return 0;
1172 }
1173
1174 int init_random_map(struct thread_data *td)
1175 {
1176         unsigned long long blocks;
1177         struct fio_file *f;
1178         unsigned int i;
1179
1180         if (init_rand_distribution(td))
1181                 return 0;
1182         if (!td_random(td))
1183                 return 0;
1184
1185         for_each_file(td, f, i) {
1186                 uint64_t fsize = min(f->real_file_size, f->io_size);
1187
1188                 blocks = fsize / (unsigned long long) td->o.rw_min_bs;
1189
1190                 if (check_rand_gen_limits(td, f, blocks))
1191                         return 1;
1192
1193                 if (td->o.random_generator == FIO_RAND_GEN_LFSR) {
1194                         unsigned long seed;
1195
1196                         seed = td->rand_seeds[FIO_RAND_BLOCK_OFF];
1197
1198                         if (!lfsr_init(&f->lfsr, blocks, seed, 0)) {
1199                                 fio_file_set_lfsr(f);
1200                                 continue;
1201                         }
1202                 } else if (!td->o.norandommap) {
1203                         f->io_axmap = axmap_new(blocks);
1204                         if (f->io_axmap) {
1205                                 fio_file_set_axmap(f);
1206                                 continue;
1207                         }
1208                 } else if (td->o.norandommap)
1209                         continue;
1210
1211                 if (!td->o.softrandommap) {
1212                         log_err("fio: failed allocating random map. If running"
1213                                 " a large number of jobs, try the 'norandommap'"
1214                                 " option or set 'softrandommap'. Or give"
1215                                 " a larger --alloc-size to fio.\n");
1216                         return 1;
1217                 }
1218
1219                 log_info("fio: file %s failed allocating random map. Running "
1220                          "job without.\n", f->file_name);
1221         }
1222
1223         return 0;
1224 }
1225
1226 void close_files(struct thread_data *td)
1227 {
1228         struct fio_file *f;
1229         unsigned int i;
1230
1231         for_each_file(td, f, i) {
1232                 if (fio_file_open(f))
1233                         td_io_close_file(td, f);
1234         }
1235 }
1236
1237 void close_and_free_files(struct thread_data *td)
1238 {
1239         struct fio_file *f;
1240         unsigned int i;
1241
1242         dprint(FD_FILE, "close files\n");
1243
1244         for_each_file(td, f, i) {
1245                 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
1246                         dprint(FD_FILE, "free unlink %s\n", f->file_name);
1247                         td_io_unlink_file(td, f);
1248                 }
1249
1250                 if (fio_file_open(f))
1251                         td_io_close_file(td, f);
1252
1253                 remove_file_hash(f);
1254
1255                 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
1256                         dprint(FD_FILE, "free unlink %s\n", f->file_name);
1257                         td_io_unlink_file(td, f);
1258                 }
1259
1260                 sfree(f->file_name);
1261                 f->file_name = NULL;
1262                 if (fio_file_axmap(f)) {
1263                         axmap_free(f->io_axmap);
1264                         f->io_axmap = NULL;
1265                 }
1266                 sfree(f);
1267         }
1268
1269         td->o.filename = NULL;
1270         free(td->files);
1271         free(td->file_locks);
1272         td->files_index = 0;
1273         td->files = NULL;
1274         td->file_locks = NULL;
1275         td->o.file_lock_mode = FILE_LOCK_NONE;
1276         td->o.nr_files = 0;
1277 }
1278
1279 static void get_file_type(struct fio_file *f)
1280 {
1281         struct stat sb;
1282
1283         if (!strcmp(f->file_name, "-"))
1284                 f->filetype = FIO_TYPE_PIPE;
1285         else
1286                 f->filetype = FIO_TYPE_FILE;
1287
1288 #ifdef WIN32
1289         /* \\.\ is the device namespace in Windows, where every file is
1290          * a block device */
1291         if (strncmp(f->file_name, "\\\\.\\", 4) == 0)
1292                 f->filetype = FIO_TYPE_BLOCK;
1293 #endif
1294
1295         if (!stat(f->file_name, &sb)) {
1296                 if (S_ISBLK(sb.st_mode))
1297                         f->filetype = FIO_TYPE_BLOCK;
1298                 else if (S_ISCHR(sb.st_mode))
1299                         f->filetype = FIO_TYPE_CHAR;
1300                 else if (S_ISFIFO(sb.st_mode))
1301                         f->filetype = FIO_TYPE_PIPE;
1302         }
1303 }
1304
1305 static bool __is_already_allocated(const char *fname, bool set)
1306 {
1307         struct flist_head *entry;
1308         bool ret;
1309
1310         ret = file_bloom_exists(fname, set);
1311         if (!ret)
1312                 return ret;
1313
1314         flist_for_each(entry, &filename_list) {
1315                 struct file_name *fn;
1316
1317                 fn = flist_entry(entry, struct file_name, list);
1318
1319                 if (!strcmp(fn->filename, fname))
1320                         return true;
1321         }
1322
1323         return false;
1324 }
1325
1326 static bool is_already_allocated(const char *fname)
1327 {
1328         bool ret;
1329
1330         fio_file_hash_lock();
1331         ret = __is_already_allocated(fname, false);
1332         fio_file_hash_unlock();
1333
1334         return ret;
1335 }
1336
1337 static void set_already_allocated(const char *fname)
1338 {
1339         struct file_name *fn;
1340
1341         fn = malloc(sizeof(struct file_name));
1342         fn->filename = strdup(fname);
1343
1344         fio_file_hash_lock();
1345         if (!__is_already_allocated(fname, true)) {
1346                 flist_add_tail(&fn->list, &filename_list);
1347                 fn = NULL;
1348         }
1349         fio_file_hash_unlock();
1350
1351         if (fn) {
1352                 free(fn->filename);
1353                 free(fn);
1354         }
1355 }
1356
1357 static void free_already_allocated(void)
1358 {
1359         struct flist_head *entry, *tmp;
1360         struct file_name *fn;
1361
1362         if (flist_empty(&filename_list))
1363                 return;
1364
1365         fio_file_hash_lock();
1366         flist_for_each_safe(entry, tmp, &filename_list) {
1367                 fn = flist_entry(entry, struct file_name, list);
1368                 free(fn->filename);
1369                 flist_del(&fn->list);
1370                 free(fn);
1371         }
1372
1373         fio_file_hash_unlock();
1374 }
1375
1376 static struct fio_file *alloc_new_file(struct thread_data *td)
1377 {
1378         struct fio_file *f;
1379
1380         f = smalloc(sizeof(*f));
1381         if (!f) {
1382                 assert(0);
1383                 return NULL;
1384         }
1385
1386         f->fd = -1;
1387         f->shadow_fd = -1;
1388         fio_file_reset(td, f);
1389         return f;
1390 }
1391
1392 bool exists_and_not_regfile(const char *filename)
1393 {
1394         struct stat sb;
1395
1396         if (lstat(filename, &sb) == -1)
1397                 return false;
1398
1399 #ifndef WIN32 /* NOT Windows */
1400         if (S_ISREG(sb.st_mode))
1401                 return false;
1402 #else
1403         /* \\.\ is the device namespace in Windows, where every file
1404          * is a device node */
1405         if (S_ISREG(sb.st_mode) && strncmp(filename, "\\\\.\\", 4) != 0)
1406                 return false;
1407 #endif
1408
1409         return true;
1410 }
1411
1412 int add_file(struct thread_data *td, const char *fname, int numjob, int inc)
1413 {
1414         int cur_files = td->files_index;
1415         char file_name[PATH_MAX];
1416         struct fio_file *f;
1417         int len = 0;
1418
1419         dprint(FD_FILE, "add file %s\n", fname);
1420
1421         if (td->o.directory)
1422                 len = set_name_idx(file_name, PATH_MAX, td->o.directory, numjob,
1423                                         td->o.unique_filename);
1424
1425         sprintf(file_name + len, "%s", fname);
1426
1427         /* clean cloned siblings using existing files */
1428         if (numjob && is_already_allocated(file_name) &&
1429             !exists_and_not_regfile(fname))
1430                 return 0;
1431
1432         f = alloc_new_file(td);
1433
1434         if (td->files_size <= td->files_index) {
1435                 unsigned int new_size = td->o.nr_files + 1;
1436
1437                 dprint(FD_FILE, "resize file array to %d files\n", new_size);
1438
1439                 td->files = realloc(td->files, new_size * sizeof(f));
1440                 if (td->files == NULL) {
1441                         log_err("fio: realloc OOM\n");
1442                         assert(0);
1443                 }
1444                 if (td->o.file_lock_mode != FILE_LOCK_NONE) {
1445                         td->file_locks = realloc(td->file_locks, new_size);
1446                         if (!td->file_locks) {
1447                                 log_err("fio: realloc OOM\n");
1448                                 assert(0);
1449                         }
1450                         td->file_locks[cur_files] = FILE_LOCK_NONE;
1451                 }
1452                 td->files_size = new_size;
1453         }
1454         td->files[cur_files] = f;
1455         f->fileno = cur_files;
1456
1457         /*
1458          * init function, io engine may not be loaded yet
1459          */
1460         if (td->io_ops && td_ioengine_flagged(td, FIO_DISKLESSIO))
1461                 f->real_file_size = -1ULL;
1462
1463         f->file_name = smalloc_strdup(file_name);
1464         if (!f->file_name)
1465                 assert(0);
1466
1467         get_file_type(f);
1468
1469         switch (td->o.file_lock_mode) {
1470         case FILE_LOCK_NONE:
1471                 break;
1472         case FILE_LOCK_READWRITE:
1473                 f->rwlock = fio_rwlock_init();
1474                 break;
1475         case FILE_LOCK_EXCLUSIVE:
1476                 f->lock = fio_mutex_init(FIO_MUTEX_UNLOCKED);
1477                 break;
1478         default:
1479                 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
1480                 assert(0);
1481         }
1482
1483         td->files_index++;
1484         if (f->filetype == FIO_TYPE_FILE)
1485                 td->nr_normal_files++;
1486
1487         set_already_allocated(file_name);
1488
1489         if (inc)
1490                 td->o.nr_files++;
1491
1492         dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name,
1493                                                         cur_files);
1494
1495         return cur_files;
1496 }
1497
1498 int add_file_exclusive(struct thread_data *td, const char *fname)
1499 {
1500         struct fio_file *f;
1501         unsigned int i;
1502
1503         for_each_file(td, f, i) {
1504                 if (!strcmp(f->file_name, fname))
1505                         return i;
1506         }
1507
1508         return add_file(td, fname, 0, 1);
1509 }
1510
1511 void get_file(struct fio_file *f)
1512 {
1513         dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
1514         assert(fio_file_open(f));
1515         f->references++;
1516 }
1517
1518 int put_file(struct thread_data *td, struct fio_file *f)
1519 {
1520         int f_ret = 0, ret = 0;
1521
1522         dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
1523
1524         if (!fio_file_open(f)) {
1525                 assert(f->fd == -1);
1526                 return 0;
1527         }
1528
1529         assert(f->references);
1530         if (--f->references)
1531                 return 0;
1532
1533         if (should_fsync(td) && td->o.fsync_on_close) {
1534                 f_ret = fsync(f->fd);
1535                 if (f_ret < 0)
1536                         f_ret = errno;
1537         }
1538
1539         if (td->io_ops->close_file)
1540                 ret = td->io_ops->close_file(td, f);
1541
1542         if (!ret)
1543                 ret = f_ret;
1544
1545         td->nr_open_files--;
1546         fio_file_clear_open(f);
1547         assert(f->fd == -1);
1548         return ret;
1549 }
1550
1551 void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
1552 {
1553         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1554                 return;
1555
1556         if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
1557                 if (ddir == DDIR_READ)
1558                         fio_rwlock_read(f->rwlock);
1559                 else
1560                         fio_rwlock_write(f->rwlock);
1561         } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1562                 fio_mutex_down(f->lock);
1563
1564         td->file_locks[f->fileno] = td->o.file_lock_mode;
1565 }
1566
1567 void unlock_file(struct thread_data *td, struct fio_file *f)
1568 {
1569         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1570                 return;
1571
1572         if (td->o.file_lock_mode == FILE_LOCK_READWRITE)
1573                 fio_rwlock_unlock(f->rwlock);
1574         else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1575                 fio_mutex_up(f->lock);
1576
1577         td->file_locks[f->fileno] = FILE_LOCK_NONE;
1578 }
1579
1580 void unlock_file_all(struct thread_data *td, struct fio_file *f)
1581 {
1582         if (td->o.file_lock_mode == FILE_LOCK_NONE || !td->file_locks)
1583                 return;
1584         if (td->file_locks[f->fileno] != FILE_LOCK_NONE)
1585                 unlock_file(td, f);
1586 }
1587
1588 static int recurse_dir(struct thread_data *td, const char *dirname)
1589 {
1590         struct dirent *dir;
1591         int ret = 0;
1592         DIR *D;
1593
1594         D = opendir(dirname);
1595         if (!D) {
1596                 char buf[FIO_VERROR_SIZE];
1597
1598                 snprintf(buf, FIO_VERROR_SIZE, "opendir(%s)", dirname);
1599                 td_verror(td, errno, buf);
1600                 return 1;
1601         }
1602
1603         while ((dir = readdir(D)) != NULL) {
1604                 char full_path[PATH_MAX];
1605                 struct stat sb;
1606
1607                 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
1608                         continue;
1609
1610                 sprintf(full_path, "%s%s%s", dirname, FIO_OS_PATH_SEPARATOR, dir->d_name);
1611
1612                 if (lstat(full_path, &sb) == -1) {
1613                         if (errno != ENOENT) {
1614                                 td_verror(td, errno, "stat");
1615                                 ret = 1;
1616                                 break;
1617                         }
1618                 }
1619
1620                 if (S_ISREG(sb.st_mode)) {
1621                         add_file(td, full_path, 0, 1);
1622                         continue;
1623                 }
1624                 if (!S_ISDIR(sb.st_mode))
1625                         continue;
1626
1627                 ret = recurse_dir(td, full_path);
1628                 if (ret)
1629                         break;
1630         }
1631
1632         closedir(D);
1633         return ret;
1634 }
1635
1636 int add_dir_files(struct thread_data *td, const char *path)
1637 {
1638         int ret = recurse_dir(td, path);
1639
1640         if (!ret)
1641                 log_info("fio: opendir added %d files\n", td->o.nr_files);
1642
1643         return ret;
1644 }
1645
1646 void dup_files(struct thread_data *td, struct thread_data *org)
1647 {
1648         struct fio_file *f;
1649         unsigned int i;
1650
1651         dprint(FD_FILE, "dup files: %d\n", org->files_index);
1652
1653         if (!org->files)
1654                 return;
1655
1656         td->files = malloc(org->files_index * sizeof(f));
1657
1658         if (td->o.file_lock_mode != FILE_LOCK_NONE)
1659                 td->file_locks = malloc(org->files_index);
1660
1661         for_each_file(org, f, i) {
1662                 struct fio_file *__f;
1663
1664                 __f = alloc_new_file(td);
1665
1666                 if (f->file_name) {
1667                         __f->file_name = smalloc_strdup(f->file_name);
1668                         if (!__f->file_name)
1669                                 assert(0);
1670
1671                         __f->filetype = f->filetype;
1672                 }
1673
1674                 if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1675                         __f->lock = f->lock;
1676                 else if (td->o.file_lock_mode == FILE_LOCK_READWRITE)
1677                         __f->rwlock = f->rwlock;
1678
1679                 td->files[i] = __f;
1680         }
1681 }
1682
1683 /*
1684  * Returns the index that matches the filename, or -1 if not there
1685  */
1686 int get_fileno(struct thread_data *td, const char *fname)
1687 {
1688         struct fio_file *f;
1689         unsigned int i;
1690
1691         for_each_file(td, f, i)
1692                 if (!strcmp(f->file_name, fname))
1693                         return i;
1694
1695         return -1;
1696 }
1697
1698 /*
1699  * For log usage, where we add/open/close files automatically
1700  */
1701 void free_release_files(struct thread_data *td)
1702 {
1703         close_files(td);
1704         td->o.nr_files = 0;
1705         td->o.open_files = 0;
1706         td->files_index = 0;
1707         td->nr_normal_files = 0;
1708 }
1709
1710 void fio_file_reset(struct thread_data *td, struct fio_file *f)
1711 {
1712         int i;
1713
1714         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1715                 f->last_pos[i] = f->file_offset;
1716                 f->last_start[i] = -1ULL;
1717         }
1718
1719         if (fio_file_axmap(f))
1720                 axmap_reset(f->io_axmap);
1721         else if (fio_file_lfsr(f))
1722                 lfsr_reset(&f->lfsr, td->rand_seeds[FIO_RAND_BLOCK_OFF]);
1723 }
1724
1725 bool fio_files_done(struct thread_data *td)
1726 {
1727         struct fio_file *f;
1728         unsigned int i;
1729
1730         for_each_file(td, f, i)
1731                 if (!fio_file_done(f))
1732                         return false;
1733
1734         return true;
1735 }
1736
1737 /* free memory used in initialization phase only */
1738 void filesetup_mem_free(void)
1739 {
1740         free_already_allocated();
1741 }