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                 goto err;
 248         }
 249
 250         if (!bytes) {
 251                 log_err("%s: zero sized block device?\n", f->file_name);
 252                 goto err;
 253         }
 254
 255         f->real_file_size = bytes;
 256         td->io_ops->close_file(td, f);
 257         return 0;
 258 err:
 259         td->io_ops->close_file(td, f);
 260         return 1;
 261 }
 262
 263 static int get_file_size(struct thread_data *td, struct fio_file *f)
 264 {
 265         int ret = 0;
 266
 267         if (fio_file_size_known(f))
 268                 return 0;
 269
 270         if (f->filetype == FIO_TYPE_FILE)
 271                 ret = file_size(td, f);
 272         else if (f->filetype == FIO_TYPE_BD)
 273                 ret = bdev_size(td, f);
 274         else
 275                 f->real_file_size = -1;
 276
 277         if (ret)
 278                 return ret;
 279
 280         if (f->file_offset > f->real_file_size) {
 281                 log_err("%s: offset extends end (%Lu > %Lu)\n", td->o.name,
 282                                         f->file_offset, f->real_file_size);
 283                 return 1;
 284         }
 285
 286         fio_file_set_size_known(f);
 287         return 0;
 288 }
 289
 290 static int __file_invalidate_cache(struct thread_data *td, struct fio_file *f,
 291                                    unsigned long long off,
 292                                    unsigned long long len)
 293 {
 294         int ret = 0;
 295
 296         if (len == -1ULL)
 297                 len = f->io_size;
 298         if (off == -1ULL)
 299                 off = f->file_offset;
 300
 301         if (len == -1ULL || off == -1ULL)
 302                 return 0;
 303
 304         dprint(FD_IO, "invalidate cache %s: %llu/%llu\n", f->file_name, off,
 305                                                                 len);
 306
 307         /*
 308          * FIXME: add blockdev flushing too
 309          */
 310         if (f->mmap_ptr) {
 311                 ret = madvise(f->mmap_ptr, f->mmap_sz, MADV_DONTNEED);
 312 #ifdef FIO_MADV_FREE
 313                 (void) madvise(f->mmap_ptr, f->mmap_sz, FIO_MADV_FREE);
 314 #endif
 315         } else if (f->filetype == FIO_TYPE_FILE) {
 316                 ret = fadvise(f->fd, off, len, POSIX_FADV_DONTNEED);
 317         } else if (f->filetype == FIO_TYPE_BD) {
 318                 ret = blockdev_invalidate_cache(f->fd);
 319                 if (ret < 0 && errno == EACCES && geteuid()) {
 320                         if (!root_warn) {
 321                                 log_err("fio: only root may flush block "
 322                                         "devices. Cache flush bypassed!\n");
 323                                 root_warn = 1;
 324                         }
 325                         ret = 0;
 326                 }
 327         } else if (f->filetype == FIO_TYPE_CHAR || f->filetype == FIO_TYPE_PIPE)
 328                 ret = 0;
 329
 330         if (ret < 0) {
 331                 td_verror(td, errno, "invalidate_cache");
 332                 return 1;
 333         } else if (ret > 0) {
 334                 td_verror(td, ret, "invalidate_cache");
 335                 return 1;
 336         }
 337
 338         return ret;
 339
 340 }
 341
 342 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
 343 {
 344         if (!fio_file_open(f))
 345                 return 0;
 346
 347         return __file_invalidate_cache(td, f, -1ULL, -1ULL);
 348 }
 349
 350 int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
 351 {
 352         int ret = 0;
 353
 354         dprint(FD_FILE, "fd close %s\n", f->file_name);
 355
 356         remove_file_hash(f);
 357
 358         if (close(f->fd) < 0)
 359                 ret = errno;
 360
 361         f->fd = -1;
 362         return ret;
 363 }
 364
 365 static int file_lookup_open(struct fio_file *f, int flags)
 366 {
 367         struct fio_file *__f;
 368         int from_hash;
 369
 370         __f = lookup_file_hash(f->file_name);
 371         if (__f) {
 372                 dprint(FD_FILE, "found file in hash %s\n", f->file_name);
 373                 /*
 374                  * racy, need the __f->lock locked
 375                  */
 376                 f->lock = __f->lock;
 377                 f->lock_owner = __f->lock_owner;
 378                 f->lock_batch = __f->lock_batch;
 379                 f->lock_ddir = __f->lock_ddir;
 380                 from_hash = 1;
 381         } else {
 382                 dprint(FD_FILE, "file not found in hash %s\n", f->file_name);
 383                 from_hash = 0;
 384         }
 385
 386         f->fd = open(f->file_name, flags, 0600);
 387         return from_hash;
 388 }
 389
 390 int generic_open_file(struct thread_data *td, struct fio_file *f)
 391 {
 392         int is_std = 0;
 393         int flags = 0;
 394         int from_hash = 0;
 395
 396         dprint(FD_FILE, "fd open %s\n", f->file_name);
 397
 398         if (!strcmp(f->file_name, "-")) {
 399                 if (td_rw(td)) {
 400                         log_err("fio: can't read/write to stdin/out\n");
 401                         return 1;
 402                 }
 403                 is_std = 1;
 404
 405                 /*
 406                  * move output logging to stderr, if we are writing to stdout
 407                  */
 408                 if (td_write(td))
 409                         f_out = stderr;
 410         }
 411
 412         if (td->o.odirect)
 413                 flags |= OS_O_DIRECT;
 414         if (td->o.sync_io)
 415                 flags |= O_SYNC;
 416         if (f->filetype != FIO_TYPE_FILE)
 417                 flags |= FIO_O_NOATIME;
 418         if (td->o.create_on_open)
 419                 flags |= O_CREAT;
 420
 421 open_again:
 422         if (td_write(td)) {
 423                 if (!read_only)
 424                         flags |= O_RDWR;
 425
 426                 if (f->filetype == FIO_TYPE_FILE)
 427                         flags |= O_CREAT;
 428
 429                 if (is_std)
 430                         f->fd = dup(STDOUT_FILENO);
 431                 else
 432                         from_hash = file_lookup_open(f, flags);
 433         } else {
 434                 if (f->filetype == FIO_TYPE_CHAR && !read_only)
 435                         flags |= O_RDWR;
 436                 else
 437                         flags |= O_RDONLY;
 438
 439                 if (is_std)
 440                         f->fd = dup(STDIN_FILENO);
 441                 else
 442                         from_hash = file_lookup_open(f, flags);
 443         }
 444
 445         if (f->fd == -1) {
 446                 char buf[FIO_VERROR_SIZE];
 447                 int __e = errno;
 448
 449                 if (__e == EPERM && (flags & FIO_O_NOATIME)) {
 450                         flags &= ~FIO_O_NOATIME;
 451                         goto open_again;
 452                 }
 453
 454                 snprintf(buf, sizeof(buf) - 1, "open(%s)", f->file_name);
 455
 456                 td_verror(td, __e, buf);
 457         }
 458
 459         if (!from_hash && f->fd != -1) {
 460                 if (add_file_hash(f)) {
 461                         int ret;
 462
 463                         /*
 464                          * OK to ignore, we haven't done anything with it
 465                          */
 466                         ret = generic_close_file(td, f);
 467                         goto open_again;
 468                 }
 469         }
 470
 471         return 0;
 472 }
 473
 474 int generic_get_file_size(struct thread_data *td, struct fio_file *f)
 475 {
 476         return get_file_size(td, f);
 477 }
 478
 479 /*
 480  * open/close all files, so that ->real_file_size gets set
 481  */
 482 static int get_file_sizes(struct thread_data *td)
 483 {
 484         struct fio_file *f;
 485         unsigned int i;
 486         int err = 0;
 487
 488         for_each_file(td, f, i) {
 489                 dprint(FD_FILE, "get file size for %p/%d/%p\n", f, i,
 490                                                                 f->file_name);
 491
 492                 if (td_io_get_file_size(td, f)) {
 493                         if (td->error != ENOENT) {
 494                                 log_err("%s\n", td->verror);
 495                                 err = 1;
 496                         }
 497                         clear_error(td);
 498                 }
 499
 500                 if (f->real_file_size == -1ULL && td->o.size)
 501                         f->real_file_size = td->o.size / td->o.nr_files;
 502         }
 503
 504         return err;
 505 }
 506
 507 struct fio_mount {
 508         struct flist_head list;
 509         const char *base;
 510         char __base[256];
 511         unsigned int key;
 512 };
 513
 514 /*
 515  * Get free number of bytes for each file on each unique mount.
 516  */
 517 static unsigned long long get_fs_free_counts(struct thread_data *td)
 518 {
 519         struct flist_head *n, *tmp;
 520         unsigned long long ret = 0;
 521         struct fio_mount *fm;
 522         FLIST_HEAD(list);
 523         struct fio_file *f;
 524         unsigned int i;
 525
 526         for_each_file(td, f, i) {
 527                 struct stat sb;
 528                 char buf[256];
 529
 530                 if (f->filetype == FIO_TYPE_BD) {
 531                         ret += f->real_file_size;
 532                         continue;
 533                 } else if (f->filetype != FIO_TYPE_FILE)
 534                         continue;
 535
 536                 strcpy(buf, f->file_name);
 537
 538                 if (stat(buf, &sb) < 0) {
 539                         if (errno != ENOENT)
 540                                 break;
 541                         strcpy(buf, ".");
 542                         if (stat(buf, &sb) < 0)
 543                                 break;
 544                 }
 545
 546                 fm = NULL;
 547                 flist_for_each(n, &list) {
 548                         fm = flist_entry(n, struct fio_mount, list);
 549                         if (fm->key == sb.st_dev)
 550                                 break;
 551
 552                         fm = NULL;
 553                 }
 554
 555                 if (fm)
 556                         continue;
 557
 558                 fm = malloc(sizeof(*fm));
 559                 strcpy(fm->__base, buf);
 560                 fm->base = basename(fm->__base);
 561                 fm->key = sb.st_dev;
 562                 flist_add(&fm->list, &list);
 563         }
 564
 565         flist_for_each_safe(n, tmp, &list) {
 566                 unsigned long long sz;
 567
 568                 fm = flist_entry(n, struct fio_mount, list);
 569                 flist_del(&fm->list);
 570
 571                 sz = get_fs_size(fm->base);
 572                 if (sz && sz != -1ULL)
 573                         ret += sz;
 574
 575                 free(fm);
 576         }
 577
 578         return ret;
 579 }
 580
 581 /*
 582  * Open the files and setup files sizes, creating files if necessary.
 583  */
 584 int setup_files(struct thread_data *td)
 585 {
 586         unsigned long long total_size, extend_size;
 587         struct fio_file *f;
 588         unsigned int i;
 589         int err = 0, need_extend;
 590
 591         dprint(FD_FILE, "setup files\n");
 592
 593         if (td->o.read_iolog_file)
 594                 return 0;
 595
 596         /*
 597          * if ioengine defines a setup() method, it's responsible for
 598          * opening the files and setting f->real_file_size to indicate
 599          * the valid range for that file.
 600          */
 601         if (td->io_ops->setup)
 602                 err = td->io_ops->setup(td);
 603         else
 604                 err = get_file_sizes(td);
 605
 606         if (err)
 607                 return err;
 608
 609         /*
 610          * check sizes. if the files/devices do not exist and the size
 611          * isn't passed to fio, abort.
 612          */
 613         total_size = 0;
 614         for_each_file(td, f, i) {
 615                 if (f->real_file_size == -1ULL)
 616                         total_size = -1ULL;
 617                 else
 618                         total_size += f->real_file_size;
 619         }
 620
 621         if (td->o.fill_device)
 622                 td->fill_device_size = get_fs_free_counts(td);
 623
 624         /*
 625          * device/file sizes are zero and no size given, punt
 626          */
 627         if ((!total_size || total_size == -1ULL) && !td->o.size &&
 628             !(td->io_ops->flags & FIO_NOIO) && !td->o.fill_device) {
 629                 log_err("%s: you need to specify size=\n", td->o.name);
 630                 td_verror(td, EINVAL, "total_file_size");
 631                 return 1;
 632         }
 633
 634         /*
 635          * now file sizes are known, so we can set ->io_size. if size= is
 636          * not given, ->io_size is just equal to ->real_file_size. if size
 637          * is given, ->io_size is size / nr_files.
 638          */
 639         extend_size = total_size = 0;
 640         need_extend = 0;
 641         for_each_file(td, f, i) {
 642                 f->file_offset = td->o.start_offset;
 643
 644                 if (!td->o.file_size_low) {
 645                         /*
 646                          * no file size range given, file size is equal to
 647                          * total size divided by number of files. if that is
 648                          * zero, set it to the real file size.
 649                          */
 650                         f->io_size = td->o.size / td->o.nr_files;
 651                         if (!f->io_size)
 652                                 f->io_size = f->real_file_size - f->file_offset;
 653                 } else if (f->real_file_size < td->o.file_size_low ||
 654                            f->real_file_size > td->o.file_size_high) {
 655                         if (f->file_offset > td->o.file_size_low)
 656                                 goto err_offset;
 657                         /*
 658                          * file size given. if it's fixed, use that. if it's a
 659                          * range, generate a random size in-between.
 660                          */
 661                         if (td->o.file_size_low == td->o.file_size_high) {
 662                                 f->io_size = td->o.file_size_low
 663                                                 - f->file_offset;
 664                         } else {
 665                                 f->io_size = get_rand_file_size(td)
 666                                                 - f->file_offset;
 667                         }
 668                 } else
 669                         f->io_size = f->real_file_size - f->file_offset;
 670
 671                 if (f->io_size == -1ULL)
 672                         total_size = -1ULL;
 673                 else
 674                         total_size += f->io_size;
 675
 676                 if (f->filetype == FIO_TYPE_FILE &&
 677                     (f->io_size + f->file_offset) > f->real_file_size &&
 678                     !(td->io_ops->flags & FIO_DISKLESSIO)) {
 679                         if (!td->o.create_on_open) {
 680                                 need_extend++;
 681                                 extend_size += (f->io_size + f->file_offset);
 682                         } else
 683                                 f->real_file_size = f->io_size + f->file_offset;
 684                         fio_file_set_extend(f);
 685                 }
 686         }
 687
 688         if (!td->o.size || td->o.size > total_size)
 689                 td->o.size = total_size;
 690
 691         /*
 692          * See if we need to extend some files
 693          */
 694         if (need_extend) {
 695                 temp_stall_ts = 1;
 696                 if (!terse_output)
 697                         log_info("%s: Laying out IO file(s) (%u file(s) /"
 698                                  " %LuMB)\n", td->o.name, need_extend,
 699                                         extend_size >> 20);
 700
 701                 for_each_file(td, f, i) {
 702                         unsigned long long old_len = -1ULL, extend_len = -1ULL;
 703
 704                         if (!fio_file_extend(f))
 705                                 continue;
 706
 707                         assert(f->filetype == FIO_TYPE_FILE);
 708                         fio_file_clear_extend(f);
 709                         if (!td->o.fill_device) {
 710                                 old_len = f->real_file_size;
 711                                 extend_len = f->io_size + f->file_offset -
 712                                                 old_len;
 713                         }
 714                         f->real_file_size = (f->io_size + f->file_offset);
 715                         err = extend_file(td, f);
 716                         if (err)
 717                                 break;
 718
 719                         err = __file_invalidate_cache(td, f, old_len,
 720                                                                 extend_len);
 721                         close(f->fd);
 722                         f->fd = -1;
 723                         if (err)
 724                                 break;
 725                 }
 726                 temp_stall_ts = 0;
 727         }
 728
 729         if (err)
 730                 return err;
 731
 732         if (!td->o.zone_size)
 733                 td->o.zone_size = td->o.size;
 734
 735         /*
 736          * iolog already set the total io size, if we read back
 737          * stored entries.
 738          */
 739         if (!td->o.read_iolog_file)
 740                 td->total_io_size = td->o.size * td->o.loops;
 741         return 0;
 742 err_offset:
 743         log_err("%s: you need to specify valid offset=\n", td->o.name);
 744         return 1;
 745 }
 746
 747 int pre_read_files(struct thread_data *td)
 748 {
 749         struct fio_file *f;
 750         unsigned int i;
 751
 752         dprint(FD_FILE, "pre_read files\n");
 753
 754         for_each_file(td, f, i) {
 755                 pre_read_file(td, f);
 756         }
 757
 758         return 1;
 759 }
 760
 761 int init_random_map(struct thread_data *td)
 762 {
 763         unsigned long long blocks, num_maps;
 764         struct fio_file *f;
 765         unsigned int i;
 766
 767         if (td->o.norandommap || !td_random(td))
 768                 return 0;
 769
 770         for_each_file(td, f, i) {
 771                 blocks = (f->real_file_size + td->o.rw_min_bs - 1) /
 772                                 (unsigned long long) td->o.rw_min_bs;
 773                 num_maps = (blocks + BLOCKS_PER_MAP - 1) /
 774                                 (unsigned long long) BLOCKS_PER_MAP;
 775                 f->file_map = smalloc(num_maps * sizeof(int));
 776                 if (f->file_map) {
 777                         f->num_maps = num_maps;
 778                         continue;
 779                 }
 780                 if (!td->o.softrandommap) {
 781                         log_err("fio: failed allocating random map. If running"
 782                                 " a large number of jobs, try the 'norandommap'"
 783                                 " option or set 'softrandommap'. Or give"
 784                                 " a larger --alloc-size to fio.\n");
 785                         return 1;
 786                 }
 787
 788                 log_info("fio: file %s failed allocating random map. Running "
 789                          "job without.\n", f->file_name);
 790                 f->num_maps = 0;
 791         }
 792
 793         return 0;
 794 }
 795
 796 void close_files(struct thread_data *td)
 797 {
 798         struct fio_file *f;
 799         unsigned int i;
 800
 801         for_each_file(td, f, i) {
 802                 if (fio_file_open(f))
 803                         td_io_close_file(td, f);
 804         }
 805 }
 806
 807 void close_and_free_files(struct thread_data *td)
 808 {
 809         struct fio_file *f;
 810         unsigned int i;
 811
 812         dprint(FD_FILE, "close files\n");
 813
 814         for_each_file(td, f, i) {
 815                 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
 816                         dprint(FD_FILE, "free unlink %s\n", f->file_name);
 817                         unlink(f->file_name);
 818                 }
 819
 820                 if (fio_file_open(f))
 821                         td_io_close_file(td, f);
 822
 823                 remove_file_hash(f);
 824
 825                 sfree(f->file_name);
 826                 f->file_name = NULL;
 827                 sfree(f->file_map);
 828                 f->file_map = NULL;
 829                 sfree(f);
 830         }
 831
 832         td->o.filename = NULL;
 833         free(td->files);
 834         td->files_index = 0;
 835         td->files = NULL;
 836         td->o.nr_files = 0;
 837 }
 838
 839 static void get_file_type(struct fio_file *f)
 840 {
 841         struct stat sb;
 842
 843         if (!strcmp(f->file_name, "-"))
 844                 f->filetype = FIO_TYPE_PIPE;
 845         else
 846                 f->filetype = FIO_TYPE_FILE;
 847
 848         if (!stat(f->file_name, &sb)) {
 849                 if (S_ISBLK(sb.st_mode))
 850                         f->filetype = FIO_TYPE_BD;
 851                 else if (S_ISCHR(sb.st_mode))
 852                         f->filetype = FIO_TYPE_CHAR;
 853                 else if (S_ISFIFO(sb.st_mode))
 854                         f->filetype = FIO_TYPE_PIPE;
 855         }
 856 }
 857
 858 int add_file(struct thread_data *td, const char *fname)
 859 {
 860         int cur_files = td->files_index;
 861         char file_name[PATH_MAX];
 862         struct fio_file *f;
 863         int len = 0;
 864
 865         dprint(FD_FILE, "add file %s\n", fname);
 866
 867         f = smalloc(sizeof(*f));
 868         if (!f) {
 869                 log_err("fio: smalloc OOM\n");
 870                 assert(0);
 871         }
 872
 873         f->fd = -1;
 874
 875         if (td->files_size <= td->files_index) {
 876                 int new_size = td->o.nr_files + 1;
 877
 878                 dprint(FD_FILE, "resize file array to %d files\n", new_size);
 879
 880                 td->files = realloc(td->files, new_size * sizeof(f));
 881                 td->files_size = new_size;
 882         }
 883         td->files[cur_files] = f;
 884
 885         /*
 886          * init function, io engine may not be loaded yet
 887          */
 888         if (td->io_ops && (td->io_ops->flags & FIO_DISKLESSIO))
 889                 f->real_file_size = -1ULL;
 890
 891         if (td->o.directory)
 892                 len = sprintf(file_name, "%s/", td->o.directory);
 893
 894         sprintf(file_name + len, "%s", fname);
 895         f->file_name = smalloc_strdup(file_name);
 896         if (!f->file_name) {
 897                 log_err("fio: smalloc OOM\n");
 898                 assert(0);
 899         }
 900
 901         get_file_type(f);
 902
 903         switch (td->o.file_lock_mode) {
 904         case FILE_LOCK_NONE:
 905                 break;
 906         case FILE_LOCK_READWRITE:
 907                 f->lock = fio_mutex_rw_init();
 908                 break;
 909         case FILE_LOCK_EXCLUSIVE:
 910                 f->lock = fio_mutex_init(1);
 911                 break;
 912         default:
 913                 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
 914                 assert(0);
 915         }
 916
 917         td->files_index++;
 918         if (f->filetype == FIO_TYPE_FILE)
 919                 td->nr_normal_files++;
 920
 921         dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name,
 922                                                         cur_files);
 923
 924         return cur_files;
 925 }
 926
 927 void get_file(struct fio_file *f)
 928 {
 929         dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
 930         assert(fio_file_open(f));
 931         f->references++;
 932 }
 933
 934 int put_file(struct thread_data *td, struct fio_file *f)
 935 {
 936         int f_ret = 0, ret = 0;
 937
 938         dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
 939
 940         if (!fio_file_open(f)) {
 941                 assert(f->fd == -1);
 942                 return 0;
 943         }
 944
 945         assert(f->references);
 946         if (--f->references)
 947                 return 0;
 948
 949         if (should_fsync(td) && td->o.fsync_on_close)
 950                 f_ret = fsync(f->fd);
 951
 952         if (td->io_ops->close_file)
 953                 ret = td->io_ops->close_file(td, f);
 954
 955         if (!ret)
 956                 ret = f_ret;
 957
 958         td->nr_open_files--;
 959         fio_file_clear_open(f);
 960         assert(f->fd == -1);
 961         return ret;
 962 }
 963
 964 void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
 965 {
 966         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
 967                 return;
 968
 969         if (f->lock_owner == td && f->lock_batch--)
 970                 return;
 971
 972         if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
 973                 if (ddir == DDIR_READ)
 974                         fio_mutex_down_read(f->lock);
 975                 else
 976                         fio_mutex_down_write(f->lock);
 977         } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
 978                 fio_mutex_down(f->lock);
 979
 980         f->lock_owner = td;
 981         f->lock_batch = td->o.lockfile_batch;
 982         f->lock_ddir = ddir;
 983 }
 984
 985 void unlock_file(struct thread_data *td, struct fio_file *f)
 986 {
 987         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
 988                 return;
 989         if (f->lock_batch)
 990                 return;
 991
 992         if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
 993                 const int is_read = f->lock_ddir == DDIR_READ;
 994                 int val = fio_mutex_getval(f->lock);
 995
 996                 if ((is_read && val == 1) || (!is_read && val == -1))
 997                         f->lock_owner = NULL;
 998
 999                 if (is_read)
1000                         fio_mutex_up_read(f->lock);
1001                 else
1002                         fio_mutex_up_write(f->lock);
1003         } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE) {
1004                 int val = fio_mutex_getval(f->lock);
1005
1006                 if (val == 0)
1007                         f->lock_owner = NULL;
1008
1009                 fio_mutex_up(f->lock);
1010         }
1011 }
1012
1013 void unlock_file_all(struct thread_data *td, struct fio_file *f)
1014 {
1015         if (f->lock_owner != td)
1016                 return;
1017
1018         f->lock_batch = 0;
1019         unlock_file(td, f);
1020 }
1021
1022 static int recurse_dir(struct thread_data *td, const char *dirname)
1023 {
1024         struct dirent *dir;
1025         int ret = 0;
1026         DIR *D;
1027
1028         D = opendir(dirname);
1029         if (!D) {
1030                 char buf[FIO_VERROR_SIZE];
1031
1032                 snprintf(buf, FIO_VERROR_SIZE - 1, "opendir(%s)", dirname);
1033                 td_verror(td, errno, buf);
1034                 return 1;
1035         }
1036
1037         while ((dir = readdir(D)) != NULL) {
1038                 char full_path[PATH_MAX];
1039                 struct stat sb;
1040
1041                 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
1042                         continue;
1043
1044                 sprintf(full_path, "%s/%s", dirname, dir->d_name);
1045
1046                 if (lstat(full_path, &sb) == -1) {
1047                         if (errno != ENOENT) {
1048                                 td_verror(td, errno, "stat");
1049                                 return 1;
1050                         }
1051                 }
1052
1053                 if (S_ISREG(sb.st_mode)) {
1054                         add_file(td, full_path);
1055                         td->o.nr_files++;
1056                         continue;
1057                 }
1058                 if (!S_ISDIR(sb.st_mode))
1059                         continue;
1060
1061                 ret = recurse_dir(td, full_path);
1062                 if (ret)
1063                         break;
1064         }
1065
1066         closedir(D);
1067         return ret;
1068 }
1069
1070 int add_dir_files(struct thread_data *td, const char *path)
1071 {
1072         int ret = recurse_dir(td, path);
1073
1074         if (!ret)
1075                 log_info("fio: opendir added %d files\n", td->o.nr_files);
1076
1077         return ret;
1078 }
1079
1080 void dup_files(struct thread_data *td, struct thread_data *org)
1081 {
1082         struct fio_file *f;
1083         unsigned int i;
1084
1085         dprint(FD_FILE, "dup files: %d\n", org->files_index);
1086
1087         if (!org->files)
1088                 return;
1089
1090         td->files = malloc(org->files_index * sizeof(f));
1091
1092         for_each_file(org, f, i) {
1093                 struct fio_file *__f;
1094
1095                 __f = smalloc(sizeof(*__f));
1096                 if (!__f) {
1097                         log_err("fio: smalloc OOM\n");
1098                         assert(0);
1099                 }
1100                 __f->fd = -1;
1101
1102                 if (f->file_name) {
1103                         __f->file_name = smalloc_strdup(f->file_name);
1104                         if (!__f->file_name) {
1105                                 log_err("fio: smalloc OOM\n");
1106                                 assert(0);
1107                         }
1108
1109                         __f->filetype = f->filetype;
1110                 }
1111
1112                 td->files[i] = __f;
1113         }
1114 }
1115
1116 /*
1117  * Returns the index that matches the filename, or -1 if not there
1118  */
1119 int get_fileno(struct thread_data *td, const char *fname)
1120 {
1121         struct fio_file *f;
1122         unsigned int i;
1123
1124         for_each_file(td, f, i)
1125                 if (!strcmp(f->file_name, fname))
1126                         return i;
1127
1128         return -1;
1129 }
1130
1131 /*
1132  * For log usage, where we add/open/close files automatically
1133  */
1134 void free_release_files(struct thread_data *td)
1135 {
1136         close_files(td);
1137         td->files_index = 0;
1138         td->nr_normal_files = 0;
1139 }