filesetup.c

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