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