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 #ifdef FIO_HAVE_LINUX_FALLOCATE
  17 #include <linux/falloc.h>
  18 #endif
  19
  20 static int root_warn;
  21
  22 static inline void clear_error(struct thread_data *td)
  23 {
  24         td->error = 0;
  25         td->verror[0] = '\0';
  26 }
  27
  28 /*
  29  * Leaves f->fd open on success, caller must close
  30  */
  31 static int extend_file(struct thread_data *td, struct fio_file *f)
  32 {
  33         int r, new_layout = 0, unlink_file = 0, flags;
  34         unsigned long long left;
  35         unsigned int bs;
  36         char *b;
  37
  38         if (read_only) {
  39                 log_err("fio: refusing extend of file due to read-only\n");
  40                 return 0;
  41         }
  42
  43         /*
  44          * check if we need to lay the file out complete again. fio
  45          * does that for operations involving reads, or for writes
  46          * where overwrite is set
  47          */
  48         if (td_read(td) || (td_write(td) && td->o.overwrite) ||
  49             (td_write(td) && td->io_ops->flags & FIO_NOEXTEND))
  50                 new_layout = 1;
  51         if (td_write(td) && !td->o.overwrite)
  52                 unlink_file = 1;
  53
  54         if (unlink_file || new_layout) {
  55                 dprint(FD_FILE, "layout unlink %s\n", f->file_name);
  56                 if ((unlink(f->file_name) < 0) && (errno != ENOENT)) {
  57                         td_verror(td, errno, "unlink");
  58                         return 1;
  59                 }
  60         }
  61
  62         flags = O_WRONLY | O_CREAT;
  63         if (new_layout)
  64                 flags |= O_TRUNC;
  65
  66         dprint(FD_FILE, "open file %s, flags %x\n", f->file_name, flags);
  67         f->fd = open(f->file_name, flags, 0644);
  68         if (f->fd < 0) {
  69                 td_verror(td, errno, "open");
  70                 return 1;
  71         }
  72
  73 #ifdef FIO_HAVE_FALLOCATE
  74         if (!td->o.fill_device) {
  75                 switch (td->o.fallocate_mode) {
  76                 case FIO_FALLOCATE_NONE:
  77                         break;
  78                 case FIO_FALLOCATE_POSIX:
  79                         dprint(FD_FILE, "posix_fallocate file %s size %llu\n",
  80                                  f->file_name, f->real_file_size);
  81
  82                         r = posix_fallocate(f->fd, 0, f->real_file_size);
  83                         if (r > 0) {
  84                                 log_err("fio: posix_fallocate fails: %s\n",
  85                                                 strerror(r));
  86                         }
  87                         break;
  88 #ifdef FIO_HAVE_LINUX_FALLOCATE
  89                 case FIO_FALLOCATE_KEEP_SIZE:
  90                         dprint(FD_FILE,
  91                                 "fallocate(FALLOC_FL_KEEP_SIZE) "
  92                                 "file %s size %llu\n",
  93                                 f->file_name, f->real_file_size);
  94
  95                         r = fallocate(f->fd, FALLOC_FL_KEEP_SIZE, 0,
  96                                         f->real_file_size);
  97                         if (r != 0) {
  98                                 td_verror(td, errno, "fallocate");
  99                         }
 100                         break;
 101 #endif /* FIO_HAVE_LINUX_FALLOCATE */
 102                 default:
 103                         log_err("fio: unknown fallocate mode: %d\n",
 104                                 td->o.fallocate_mode);
 105                         assert(0);
 106                 }
 107         }
 108 #endif /* FIO_HAVE_FALLOCATE */
 109
 110         if (!new_layout)
 111                 goto done;
 112
 113         /*
 114          * The size will be -1ULL when fill_device is used, so don't truncate
 115          * or fallocate this file, just write it
 116          */
 117         if (!td->o.fill_device) {
 118                 dprint(FD_FILE, "truncate file %s, size %llu\n", f->file_name,
 119                                                         f->real_file_size);
 120                 if (ftruncate(f->fd, f->real_file_size) == -1) {
 121                         td_verror(td, errno, "ftruncate");
 122                         goto err;
 123                 }
 124         }
 125
 126         b = malloc(td->o.max_bs[DDIR_WRITE]);
 127         memset(b, 0, td->o.max_bs[DDIR_WRITE]);
 128
 129         left = f->real_file_size;
 130         while (left && !td->terminate) {
 131                 bs = td->o.max_bs[DDIR_WRITE];
 132                 if (bs > left)
 133                         bs = left;
 134
 135                 r = write(f->fd, b, bs);
 136
 137                 if (r > 0) {
 138                         left -= r;
 139                         continue;
 140                 } else {
 141                         if (r < 0) {
 142                                 int __e = errno;
 143
 144                                 if (__e == ENOSPC) {
 145                                         if (td->o.fill_device)
 146                                                 break;
 147                                         log_info("fio: ENOSPC on laying out "
 148                                                  "file, stopping\n");
 149                                         break;
 150                                 }
 151                                 td_verror(td, errno, "write");
 152                         } else
 153                                 td_verror(td, EIO, "write");
 154
 155                         break;
 156                 }
 157         }
 158
 159         if (td->terminate) {
 160                 dprint(FD_FILE, "terminate unlink %s\n", f->file_name);
 161                 unlink(f->file_name);
 162         } else if (td->o.create_fsync) {
 163                 if (fsync(f->fd) < 0) {
 164                         td_verror(td, errno, "fsync");
 165                         goto err;
 166                 }
 167         }
 168         if (td->o.fill_device && !td_write(td)) {
 169                 fio_file_clear_size_known(f);
 170                 if (td_io_get_file_size(td, f))
 171                         goto err;
 172                 if (f->io_size > f->real_file_size)
 173                         f->io_size = f->real_file_size;
 174         }
 175
 176         free(b);
 177 done:
 178         return 0;
 179 err:
 180         close(f->fd);
 181         f->fd = -1;
 182         return 1;
 183 }
 184
 185 static int pre_read_file(struct thread_data *td, struct fio_file *f)
 186 {
 187         int r, did_open = 0, old_runstate;
 188         unsigned long long left;
 189         unsigned int bs;
 190         char *b;
 191
 192         if (td->io_ops->flags & FIO_PIPEIO)
 193                 return 0;
 194
 195         if (!fio_file_open(f)) {
 196                 if (td->io_ops->open_file(td, f)) {
 197                         log_err("fio: cannot pre-read, failed to open file\n");
 198                         return 1;
 199                 }
 200                 did_open = 1;
 201         }
 202
 203         old_runstate = td->runstate;
 204         td_set_runstate(td, TD_PRE_READING);
 205
 206         bs = td->o.max_bs[DDIR_READ];
 207         b = malloc(bs);
 208         memset(b, 0, bs);
 209
 210         lseek(f->fd, f->file_offset, SEEK_SET);
 211         left = f->io_size;
 212
 213         while (left && !td->terminate) {
 214                 if (bs > left)
 215                         bs = left;
 216
 217                 r = read(f->fd, b, bs);
 218
 219                 if (r == (int) bs) {
 220                         left -= bs;
 221                         continue;
 222                 } else {
 223                         td_verror(td, EIO, "pre_read");
 224                         break;
 225                 }
 226         }
 227
 228         td_set_runstate(td, old_runstate);
 229
 230         if (did_open)
 231                 td->io_ops->close_file(td, f);
 232         free(b);
 233         return 0;
 234 }
 235
 236 static unsigned long long get_rand_file_size(struct thread_data *td)
 237 {
 238         unsigned long long ret, sized;
 239         unsigned long r;
 240
 241         if (td->o.use_os_rand) {
 242                 r = os_random_long(&td->file_size_state);
 243                 sized = td->o.file_size_high - td->o.file_size_low;
 244                 ret = (unsigned long long) ((double) sized * (r / (OS_RAND_MAX + 1.0)));
 245         } else {
 246                 r = __rand(&td->__file_size_state);
 247                 sized = td->o.file_size_high - td->o.file_size_low;
 248                 ret = (unsigned long long) ((double) sized * (r / (FRAND_MAX + 1.0)));
 249         }
 250
 251         ret += td->o.file_size_low;
 252         ret -= (ret % td->o.rw_min_bs);
 253         return ret;
 254 }
 255
 256 static int file_size(struct thread_data *td, struct fio_file *f)
 257 {
 258         struct stat st;
 259
 260         if (stat(f->file_name, &st) == -1) {
 261                 td_verror(td, errno, "fstat");
 262                 return 1;
 263         }
 264
 265         f->real_file_size = st.st_size;
 266         return 0;
 267 }
 268
 269 static int bdev_size(struct thread_data *td, struct fio_file *f)
 270 {
 271         unsigned long long bytes = 0;
 272         int r;
 273
 274         if (td->io_ops->open_file(td, f)) {
 275                 log_err("fio: failed opening blockdev %s for size check\n",
 276                         f->file_name);
 277                 return 1;
 278         }
 279
 280         r = blockdev_size(f, &bytes);
 281         if (r) {
 282                 td_verror(td, r, "blockdev_size");
 283                 printf("fd is %d\n", f->fd);
 284                 goto err;
 285         }
 286
 287         if (!bytes) {
 288                 log_err("%s: zero sized block device?\n", f->file_name);
 289                 goto err;
 290         }
 291
 292         f->real_file_size = bytes;
 293         td->io_ops->close_file(td, f);
 294         return 0;
 295 err:
 296         td->io_ops->close_file(td, f);
 297         return 1;
 298 }
 299
 300 static int char_size(struct thread_data *td, struct fio_file *f)
 301 {
 302 #ifdef FIO_HAVE_CHARDEV_SIZE
 303         unsigned long long bytes = 0;
 304         int r;
 305
 306         if (td->io_ops->open_file(td, f)) {
 307                 log_err("fio: failed opening blockdev %s for size check\n",
 308                         f->file_name);
 309                 return 1;
 310         }
 311
 312         r = chardev_size(f, &bytes);
 313         if (r) {
 314                 td_verror(td, r, "chardev_size");
 315                 goto err;
 316         }
 317
 318         if (!bytes) {
 319                 log_err("%s: zero sized char device?\n", f->file_name);
 320                 goto err;
 321         }
 322
 323         f->real_file_size = bytes;
 324         td->io_ops->close_file(td, f);
 325         return 0;
 326 err:
 327         td->io_ops->close_file(td, f);
 328         return 1;
 329 #else
 330         f->real_file_size = -1ULL;
 331         return 0;
 332 #endif
 333 }
 334
 335 static int get_file_size(struct thread_data *td, struct fio_file *f)
 336 {
 337         int ret = 0;
 338
 339         if (fio_file_size_known(f))
 340                 return 0;
 341
 342         if (f->filetype == FIO_TYPE_FILE)
 343                 ret = file_size(td, f);
 344         else if (f->filetype == FIO_TYPE_BD)
 345                 ret = bdev_size(td, f);
 346         else if (f->filetype == FIO_TYPE_CHAR)
 347                 ret = char_size(td, f);
 348         else
 349                 f->real_file_size = -1;
 350
 351         if (ret)
 352                 return ret;
 353
 354         if (f->file_offset > f->real_file_size) {
 355                 log_err("%s: offset extends end (%llu > %llu)\n", td->o.name,
 356                                         f->file_offset, f->real_file_size);
 357                 return 1;
 358         }
 359
 360         fio_file_set_size_known(f);
 361         return 0;
 362 }
 363
 364 static int __file_invalidate_cache(struct thread_data *td, struct fio_file *f,
 365                                    unsigned long long off,
 366                                    unsigned long long len)
 367 {
 368         int ret = 0;
 369
 370         if (len == -1ULL)
 371                 len = f->io_size;
 372         if (off == -1ULL)
 373                 off = f->file_offset;
 374
 375         if (len == -1ULL || off == -1ULL)
 376                 return 0;
 377
 378         dprint(FD_IO, "invalidate cache %s: %llu/%llu\n", f->file_name, off,
 379                                                                 len);
 380
 381         /*
 382          * FIXME: add blockdev flushing too
 383          */
 384         if (f->mmap_ptr) {
 385                 ret = posix_madvise(f->mmap_ptr, f->mmap_sz, POSIX_MADV_DONTNEED);
 386 #ifdef FIO_MADV_FREE
 387                 (void) posix_madvise(f->mmap_ptr, f->mmap_sz, FIO_MADV_FREE);
 388 #endif
 389         } else if (f->filetype == FIO_TYPE_FILE) {
 390                 ret = posix_fadvise(f->fd, off, len, POSIX_FADV_DONTNEED);
 391         } else if (f->filetype == FIO_TYPE_BD) {
 392                 ret = blockdev_invalidate_cache(f);
 393                 if (ret < 0 && errno == EACCES && geteuid()) {
 394                         if (!root_warn) {
 395                                 log_err("fio: only root may flush block "
 396                                         "devices. Cache flush bypassed!\n");
 397                                 root_warn = 1;
 398                         }
 399                         ret = 0;
 400                 }
 401         } else if (f->filetype == FIO_TYPE_CHAR || f->filetype == FIO_TYPE_PIPE)
 402                 ret = 0;
 403
 404         if (ret < 0) {
 405                 td_verror(td, errno, "invalidate_cache");
 406                 return 1;
 407         } else if (ret > 0) {
 408                 td_verror(td, ret, "invalidate_cache");
 409                 return 1;
 410         }
 411
 412         return ret;
 413
 414 }
 415
 416 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
 417 {
 418         if (!fio_file_open(f))
 419                 return 0;
 420
 421         return __file_invalidate_cache(td, f, -1ULL, -1ULL);
 422 }
 423
 424 int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
 425 {
 426         int ret = 0;
 427
 428         dprint(FD_FILE, "fd close %s\n", f->file_name);
 429
 430         remove_file_hash(f);
 431
 432         if (close(f->fd) < 0)
 433                 ret = errno;
 434
 435         f->fd = -1;
 436         return ret;
 437 }
 438
 439 static int file_lookup_open(struct fio_file *f, int flags)
 440 {
 441         struct fio_file *__f;
 442         int from_hash;
 443
 444         __f = lookup_file_hash(f->file_name);
 445         if (__f) {
 446                 dprint(FD_FILE, "found file in hash %s\n", f->file_name);
 447                 /*
 448                  * racy, need the __f->lock locked
 449                  */
 450                 f->lock = __f->lock;
 451                 f->lock_owner = __f->lock_owner;
 452                 f->lock_batch = __f->lock_batch;
 453                 f->lock_ddir = __f->lock_ddir;
 454                 from_hash = 1;
 455         } else {
 456                 dprint(FD_FILE, "file not found in hash %s\n", f->file_name);
 457                 from_hash = 0;
 458         }
 459
 460         f->fd = open(f->file_name, flags, 0600);
 461         return from_hash;
 462 }
 463
 464 int generic_open_file(struct thread_data *td, struct fio_file *f)
 465 {
 466         int is_std = 0;
 467         int flags = 0;
 468         int from_hash = 0;
 469
 470         dprint(FD_FILE, "fd open %s\n", f->file_name);
 471
 472         if (!strcmp(f->file_name, "-")) {
 473                 if (td_rw(td)) {
 474                         log_err("fio: can't read/write to stdin/out\n");
 475                         return 1;
 476                 }
 477                 is_std = 1;
 478
 479                 /*
 480                  * move output logging to stderr, if we are writing to stdout
 481                  */
 482                 if (td_write(td))
 483                         f_out = stderr;
 484         }
 485
 486         if (td->o.odirect)
 487                 flags |= OS_O_DIRECT;
 488         if (td->o.sync_io)
 489                 flags |= O_SYNC;
 490         if (f->filetype != FIO_TYPE_FILE)
 491                 flags |= FIO_O_NOATIME;
 492         if (td->o.create_on_open)
 493                 flags |= O_CREAT;
 494
 495 open_again:
 496         if (td_write(td)) {
 497                 if (!read_only)
 498                         flags |= O_RDWR;
 499
 500                 if (f->filetype == FIO_TYPE_FILE)
 501                         flags |= O_CREAT;
 502
 503                 if (is_std)
 504                         f->fd = dup(STDOUT_FILENO);
 505                 else
 506                         from_hash = file_lookup_open(f, flags);
 507         } else {
 508                 if (f->filetype == FIO_TYPE_CHAR && !read_only)
 509                         flags |= O_RDWR;
 510                 else
 511                         flags |= O_RDONLY;
 512
 513                 if (is_std)
 514                         f->fd = dup(STDIN_FILENO);
 515                 else
 516                         from_hash = file_lookup_open(f, flags);
 517         }
 518
 519         if (f->fd == -1) {
 520                 char buf[FIO_VERROR_SIZE];
 521                 int __e = errno;
 522
 523                 if (__e == EPERM && (flags & FIO_O_NOATIME)) {
 524                         flags &= ~FIO_O_NOATIME;
 525                         goto open_again;
 526                 }
 527
 528                 snprintf(buf, sizeof(buf) - 1, "open(%s)", f->file_name);
 529
 530                 td_verror(td, __e, buf);
 531         }
 532
 533         if (!from_hash && f->fd != -1) {
 534                 if (add_file_hash(f)) {
 535                         int fio_unused ret;
 536
 537                         /*
 538                          * OK to ignore, we haven't done anything with it
 539                          */
 540                         ret = generic_close_file(td, f);
 541                         goto open_again;
 542                 }
 543         }
 544
 545         return 0;
 546 }
 547
 548 int generic_get_file_size(struct thread_data *td, struct fio_file *f)
 549 {
 550         return get_file_size(td, f);
 551 }
 552
 553 /*
 554  * open/close all files, so that ->real_file_size gets set
 555  */
 556 static int get_file_sizes(struct thread_data *td)
 557 {
 558         struct fio_file *f;
 559         unsigned int i;
 560         int err = 0;
 561
 562         for_each_file(td, f, i) {
 563                 dprint(FD_FILE, "get file size for %p/%d/%p\n", f, i,
 564                                                                 f->file_name);
 565
 566                 if (td_io_get_file_size(td, f)) {
 567                         if (td->error != ENOENT) {
 568                                 log_err("%s\n", td->verror);
 569                                 err = 1;
 570                         }
 571                         clear_error(td);
 572                 }
 573
 574                 if (f->real_file_size == -1ULL && td->o.size)
 575                         f->real_file_size = td->o.size / td->o.nr_files;
 576         }
 577
 578         return err;
 579 }
 580
 581 struct fio_mount {
 582         struct flist_head list;
 583         const char *base;
 584         char __base[256];
 585         unsigned int key;
 586 };
 587
 588 /*
 589  * Get free number of bytes for each file on each unique mount.
 590  */
 591 static unsigned long long get_fs_free_counts(struct thread_data *td)
 592 {
 593         struct flist_head *n, *tmp;
 594         unsigned long long ret = 0;
 595         struct fio_mount *fm;
 596         FLIST_HEAD(list);
 597         struct fio_file *f;
 598         unsigned int i;
 599
 600         for_each_file(td, f, i) {
 601                 struct stat sb;
 602                 char buf[256];
 603
 604                 if (f->filetype == FIO_TYPE_BD || f->filetype == FIO_TYPE_CHAR) {
 605                         if (f->real_file_size != -1ULL)
 606                                 ret += f->real_file_size;
 607                         continue;
 608                 } else if (f->filetype != FIO_TYPE_FILE)
 609                         continue;
 610
 611                 strcpy(buf, f->file_name);
 612
 613                 if (stat(buf, &sb) < 0) {
 614                         if (errno != ENOENT)
 615                                 break;
 616                         strcpy(buf, ".");
 617                         if (stat(buf, &sb) < 0)
 618                                 break;
 619                 }
 620
 621                 fm = NULL;
 622                 flist_for_each(n, &list) {
 623                         fm = flist_entry(n, struct fio_mount, list);
 624                         if (fm->key == sb.st_dev)
 625                                 break;
 626
 627                         fm = NULL;
 628                 }
 629
 630                 if (fm)
 631                         continue;
 632
 633                 fm = malloc(sizeof(*fm));
 634                 strcpy(fm->__base, buf);
 635                 fm->base = basename(fm->__base);
 636                 fm->key = sb.st_dev;
 637                 flist_add(&fm->list, &list);
 638         }
 639
 640         flist_for_each_safe(n, tmp, &list) {
 641                 unsigned long long sz;
 642
 643                 fm = flist_entry(n, struct fio_mount, list);
 644                 flist_del(&fm->list);
 645
 646                 sz = get_fs_size(fm->base);
 647                 if (sz && sz != -1ULL)
 648                         ret += sz;
 649
 650                 free(fm);
 651         }
 652
 653         return ret;
 654 }
 655
 656 /*
 657  * Open the files and setup files sizes, creating files if necessary.
 658  */
 659 int setup_files(struct thread_data *td)
 660 {
 661         unsigned long long total_size, extend_size;
 662         struct fio_file *f;
 663         unsigned int i;
 664         int err = 0, need_extend;
 665
 666         dprint(FD_FILE, "setup files\n");
 667
 668         if (td->o.read_iolog_file)
 669                 return 0;
 670
 671         /*
 672          * if ioengine defines a setup() method, it's responsible for
 673          * opening the files and setting f->real_file_size to indicate
 674          * the valid range for that file.
 675          */
 676         if (td->io_ops->setup)
 677                 err = td->io_ops->setup(td);
 678         else
 679                 err = get_file_sizes(td);
 680
 681         if (err)
 682                 return err;
 683
 684         /*
 685          * check sizes. if the files/devices do not exist and the size
 686          * isn't passed to fio, abort.
 687          */
 688         total_size = 0;
 689         for_each_file(td, f, i) {
 690                 if (f->real_file_size == -1ULL)
 691                         total_size = -1ULL;
 692                 else
 693                         total_size += f->real_file_size;
 694         }
 695
 696         if (td->o.fill_device)
 697                 td->fill_device_size = get_fs_free_counts(td);
 698
 699         /*
 700          * device/file sizes are zero and no size given, punt
 701          */
 702         if ((!total_size || total_size == -1ULL) && !td->o.size &&
 703             !(td->io_ops->flags & FIO_NOIO) && !td->o.fill_device) {
 704                 log_err("%s: you need to specify size=\n", td->o.name);
 705                 td_verror(td, EINVAL, "total_file_size");
 706                 return 1;
 707         }
 708
 709         /*
 710          * now file sizes are known, so we can set ->io_size. if size= is
 711          * not given, ->io_size is just equal to ->real_file_size. if size
 712          * is given, ->io_size is size / nr_files.
 713          */
 714         extend_size = total_size = 0;
 715         need_extend = 0;
 716         for_each_file(td, f, i) {
 717                 f->file_offset = td->o.start_offset;
 718
 719                 if (!td->o.file_size_low) {
 720                         /*
 721                          * no file size range given, file size is equal to
 722                          * total size divided by number of files. if that is
 723                          * zero, set it to the real file size.
 724                          */
 725                         f->io_size = td->o.size / td->o.nr_files;
 726                         if (!f->io_size)
 727                                 f->io_size = f->real_file_size - f->file_offset;
 728                 } else if (f->real_file_size < td->o.file_size_low ||
 729                            f->real_file_size > td->o.file_size_high) {
 730                         if (f->file_offset > td->o.file_size_low)
 731                                 goto err_offset;
 732                         /*
 733                          * file size given. if it's fixed, use that. if it's a
 734                          * range, generate a random size in-between.
 735                          */
 736                         if (td->o.file_size_low == td->o.file_size_high) {
 737                                 f->io_size = td->o.file_size_low
 738                                                 - f->file_offset;
 739                         } else {
 740                                 f->io_size = get_rand_file_size(td)
 741                                                 - f->file_offset;
 742                         }
 743                 } else
 744                         f->io_size = f->real_file_size - f->file_offset;
 745
 746                 if (f->io_size == -1ULL)
 747                         total_size = -1ULL;
 748                 else
 749                         total_size += f->io_size;
 750
 751                 if (f->filetype == FIO_TYPE_FILE &&
 752                     (f->io_size + f->file_offset) > f->real_file_size &&
 753                     !(td->io_ops->flags & FIO_DISKLESSIO)) {
 754                         if (!td->o.create_on_open) {
 755                                 need_extend++;
 756                                 extend_size += (f->io_size + f->file_offset);
 757                         } else
 758                                 f->real_file_size = f->io_size + f->file_offset;
 759                         fio_file_set_extend(f);
 760                 }
 761         }
 762
 763         if (!td->o.size || td->o.size > total_size)
 764                 td->o.size = total_size;
 765
 766         /*
 767          * See if we need to extend some files
 768          */
 769         if (need_extend) {
 770                 temp_stall_ts = 1;
 771                 if (!terse_output)
 772                         log_info("%s: Laying out IO file(s) (%u file(s) /"
 773                                  " %lluMB)\n", td->o.name, need_extend,
 774                                         extend_size >> 20);
 775
 776                 for_each_file(td, f, i) {
 777                         unsigned long long old_len = -1ULL, extend_len = -1ULL;
 778
 779                         if (!fio_file_extend(f))
 780                                 continue;
 781
 782                         assert(f->filetype == FIO_TYPE_FILE);
 783                         fio_file_clear_extend(f);
 784                         if (!td->o.fill_device) {
 785                                 old_len = f->real_file_size;
 786                                 extend_len = f->io_size + f->file_offset -
 787                                                 old_len;
 788                         }
 789                         f->real_file_size = (f->io_size + f->file_offset);
 790                         err = extend_file(td, f);
 791                         if (err)
 792                                 break;
 793
 794                         err = __file_invalidate_cache(td, f, old_len,
 795                                                                 extend_len);
 796                         close(f->fd);
 797                         f->fd = -1;
 798                         if (err)
 799                                 break;
 800                 }
 801                 temp_stall_ts = 0;
 802         }
 803
 804         if (err)
 805                 return err;
 806
 807         if (!td->o.zone_size)
 808                 td->o.zone_size = td->o.size;
 809
 810         /*
 811          * iolog already set the total io size, if we read back
 812          * stored entries.
 813          */
 814         if (!td->o.read_iolog_file)
 815                 td->total_io_size = td->o.size * td->o.loops;
 816         return 0;
 817 err_offset:
 818         log_err("%s: you need to specify valid offset=\n", td->o.name);
 819         return 1;
 820 }
 821
 822 int pre_read_files(struct thread_data *td)
 823 {
 824         struct fio_file *f;
 825         unsigned int i;
 826
 827         dprint(FD_FILE, "pre_read files\n");
 828
 829         for_each_file(td, f, i) {
 830                 pre_read_file(td, f);
 831         }
 832
 833         return 1;
 834 }
 835
 836 int init_random_map(struct thread_data *td)
 837 {
 838         unsigned long long blocks, num_maps;
 839         struct fio_file *f;
 840         unsigned int i;
 841
 842         if (td->o.norandommap || !td_random(td))
 843                 return 0;
 844
 845         for_each_file(td, f, i) {
 846                 blocks = (f->real_file_size + td->o.rw_min_bs - 1) /
 847                                 (unsigned long long) td->o.rw_min_bs;
 848                 num_maps = (blocks + BLOCKS_PER_MAP - 1) /
 849                                 (unsigned long long) BLOCKS_PER_MAP;
 850                 f->file_map = smalloc(num_maps * sizeof(unsigned long));
 851                 if (f->file_map) {
 852                         f->num_maps = num_maps;
 853                         continue;
 854                 }
 855                 if (!td->o.softrandommap) {
 856                         log_err("fio: failed allocating random map. If running"
 857                                 " a large number of jobs, try the 'norandommap'"
 858                                 " option or set 'softrandommap'. Or give"
 859                                 " a larger --alloc-size to fio.\n");
 860                         return 1;
 861                 }
 862
 863                 log_info("fio: file %s failed allocating random map. Running "
 864                          "job without.\n", f->file_name);
 865                 f->num_maps = 0;
 866         }
 867
 868         return 0;
 869 }
 870
 871 void close_files(struct thread_data *td)
 872 {
 873         struct fio_file *f;
 874         unsigned int i;
 875
 876         for_each_file(td, f, i) {
 877                 if (fio_file_open(f))
 878                         td_io_close_file(td, f);
 879         }
 880 }
 881
 882 void close_and_free_files(struct thread_data *td)
 883 {
 884         struct fio_file *f;
 885         unsigned int i;
 886
 887         dprint(FD_FILE, "close files\n");
 888
 889         for_each_file(td, f, i) {
 890                 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
 891                         dprint(FD_FILE, "free unlink %s\n", f->file_name);
 892                         unlink(f->file_name);
 893                 }
 894
 895                 if (fio_file_open(f))
 896                         td_io_close_file(td, f);
 897
 898                 remove_file_hash(f);
 899
 900                 sfree(f->file_name);
 901                 f->file_name = NULL;
 902                 sfree(f->file_map);
 903                 f->file_map = NULL;
 904                 sfree(f);
 905         }
 906
 907         td->o.filename = NULL;
 908         free(td->files);
 909         td->files_index = 0;
 910         td->files = NULL;
 911         td->o.nr_files = 0;
 912 }
 913
 914 static void get_file_type(struct fio_file *f)
 915 {
 916         struct stat sb;
 917
 918         if (!strcmp(f->file_name, "-"))
 919                 f->filetype = FIO_TYPE_PIPE;
 920         else
 921                 f->filetype = FIO_TYPE_FILE;
 922
 923         if (!stat(f->file_name, &sb)) {
 924                 /* \\.\ is the device namespace in Windows, where every file is
 925                  * a block device */
 926                 if (S_ISBLK(sb.st_mode) || strncmp(f->file_name, "\\\\.\\", 4) == 0)
 927                         f->filetype = FIO_TYPE_BD;
 928                 else if (S_ISCHR(sb.st_mode))
 929                         f->filetype = FIO_TYPE_CHAR;
 930                 else if (S_ISFIFO(sb.st_mode))
 931                         f->filetype = FIO_TYPE_PIPE;
 932         }
 933 }
 934
 935 int add_file(struct thread_data *td, const char *fname)
 936 {
 937         int cur_files = td->files_index;
 938         char file_name[PATH_MAX];
 939         struct fio_file *f;
 940         int len = 0;
 941
 942         dprint(FD_FILE, "add file %s\n", fname);
 943
 944         f = smalloc(sizeof(*f));
 945         if (!f) {
 946                 log_err("fio: smalloc OOM\n");
 947                 assert(0);
 948         }
 949
 950         f->fd = -1;
 951         fio_file_reset(f);
 952
 953         if (td->files_size <= td->files_index) {
 954                 int new_size = td->o.nr_files + 1;
 955
 956                 dprint(FD_FILE, "resize file array to %d files\n", new_size);
 957
 958                 td->files = realloc(td->files, new_size * sizeof(f));
 959                 td->files_size = new_size;
 960         }
 961         td->files[cur_files] = f;
 962
 963         /*
 964          * init function, io engine may not be loaded yet
 965          */
 966         if (td->io_ops && (td->io_ops->flags & FIO_DISKLESSIO))
 967                 f->real_file_size = -1ULL;
 968
 969         if (td->o.directory)
 970                 len = sprintf(file_name, "%s/", td->o.directory);
 971
 972         sprintf(file_name + len, "%s", fname);
 973         f->file_name = smalloc_strdup(file_name);
 974         if (!f->file_name) {
 975                 log_err("fio: smalloc OOM\n");
 976                 assert(0);
 977         }
 978
 979         get_file_type(f);
 980
 981         switch (td->o.file_lock_mode) {
 982         case FILE_LOCK_NONE:
 983                 break;
 984         case FILE_LOCK_READWRITE:
 985                 f->lock = fio_mutex_rw_init();
 986                 break;
 987         case FILE_LOCK_EXCLUSIVE:
 988                 f->lock = fio_mutex_init(1);
 989                 break;
 990         default:
 991                 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
 992                 assert(0);
 993         }
 994
 995         td->files_index++;
 996         if (f->filetype == FIO_TYPE_FILE)
 997                 td->nr_normal_files++;
 998
 999         dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name,
1000                                                         cur_files);
1001
1002         return cur_files;
1003 }
1004
1005 int add_file_exclusive(struct thread_data *td, const char *fname)
1006 {
1007         struct fio_file *f;
1008         unsigned int i;
1009
1010         for_each_file(td, f, i) {
1011                 if (!strcmp(f->file_name, fname))
1012                         return i;
1013         }
1014
1015         return add_file(td, fname);
1016 }
1017
1018 void get_file(struct fio_file *f)
1019 {
1020         dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
1021         assert(fio_file_open(f));
1022         f->references++;
1023 }
1024
1025 int put_file(struct thread_data *td, struct fio_file *f)
1026 {
1027         int f_ret = 0, ret = 0;
1028
1029         dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
1030
1031         if (!fio_file_open(f)) {
1032                 assert(f->fd == -1);
1033                 return 0;
1034         }
1035
1036         assert(f->references);
1037         if (--f->references)
1038                 return 0;
1039
1040         if (should_fsync(td) && td->o.fsync_on_close)
1041                 f_ret = fsync(f->fd);
1042
1043         if (td->io_ops->close_file)
1044                 ret = td->io_ops->close_file(td, f);
1045
1046         if (!ret)
1047                 ret = f_ret;
1048
1049         td->nr_open_files--;
1050         fio_file_clear_open(f);
1051         assert(f->fd == -1);
1052         return ret;
1053 }
1054
1055 void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
1056 {
1057         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1058                 return;
1059
1060         if (f->lock_owner == td && f->lock_batch--)
1061                 return;
1062
1063         if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
1064                 if (ddir == DDIR_READ)
1065                         fio_mutex_down_read(f->lock);
1066                 else
1067                         fio_mutex_down_write(f->lock);
1068         } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1069                 fio_mutex_down(f->lock);
1070
1071         f->lock_owner = td;
1072         f->lock_batch = td->o.lockfile_batch;
1073         f->lock_ddir = ddir;
1074 }
1075
1076 void unlock_file(struct thread_data *td, struct fio_file *f)
1077 {
1078         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1079                 return;
1080         if (f->lock_batch)
1081                 return;
1082
1083         if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
1084                 const int is_read = f->lock_ddir == DDIR_READ;
1085                 int val = fio_mutex_getval(f->lock);
1086
1087                 if ((is_read && val == 1) || (!is_read && val == -1))
1088                         f->lock_owner = NULL;
1089
1090                 if (is_read)
1091                         fio_mutex_up_read(f->lock);
1092                 else
1093                         fio_mutex_up_write(f->lock);
1094         } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE) {
1095                 int val = fio_mutex_getval(f->lock);
1096
1097                 if (val == 0)
1098                         f->lock_owner = NULL;
1099
1100                 fio_mutex_up(f->lock);
1101         }
1102 }
1103
1104 void unlock_file_all(struct thread_data *td, struct fio_file *f)
1105 {
1106         if (f->lock_owner != td)
1107                 return;
1108
1109         f->lock_batch = 0;
1110         unlock_file(td, f);
1111 }
1112
1113 static int recurse_dir(struct thread_data *td, const char *dirname)
1114 {
1115         struct dirent *dir;
1116         int ret = 0;
1117         DIR *D;
1118
1119         D = opendir(dirname);
1120         if (!D) {
1121                 char buf[FIO_VERROR_SIZE];
1122
1123                 snprintf(buf, FIO_VERROR_SIZE - 1, "opendir(%s)", dirname);
1124                 td_verror(td, errno, buf);
1125                 return 1;
1126         }
1127
1128         while ((dir = readdir(D)) != NULL) {
1129                 char full_path[PATH_MAX];
1130                 struct stat sb;
1131
1132                 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
1133                         continue;
1134
1135                 sprintf(full_path, "%s/%s", dirname, dir->d_name);
1136
1137                 if (lstat(full_path, &sb) == -1) {
1138                         if (errno != ENOENT) {
1139                                 td_verror(td, errno, "stat");
1140                                 return 1;
1141                         }
1142                 }
1143
1144                 if (S_ISREG(sb.st_mode)) {
1145                         add_file(td, full_path);
1146                         td->o.nr_files++;
1147                         continue;
1148                 }
1149                 if (!S_ISDIR(sb.st_mode))
1150                         continue;
1151
1152                 ret = recurse_dir(td, full_path);
1153                 if (ret)
1154                         break;
1155         }
1156
1157         closedir(D);
1158         return ret;
1159 }
1160
1161 int add_dir_files(struct thread_data *td, const char *path)
1162 {
1163         int ret = recurse_dir(td, path);
1164
1165         if (!ret)
1166                 log_info("fio: opendir added %d files\n", td->o.nr_files);
1167
1168         return ret;
1169 }
1170
1171 void dup_files(struct thread_data *td, struct thread_data *org)
1172 {
1173         struct fio_file *f;
1174         unsigned int i;
1175
1176         dprint(FD_FILE, "dup files: %d\n", org->files_index);
1177
1178         if (!org->files)
1179                 return;
1180
1181         td->files = malloc(org->files_index * sizeof(f));
1182
1183         for_each_file(org, f, i) {
1184                 struct fio_file *__f;
1185
1186                 __f = smalloc(sizeof(*__f));
1187                 if (!__f) {
1188                         log_err("fio: smalloc OOM\n");
1189                         assert(0);
1190                 }
1191                 __f->fd = -1;
1192                 fio_file_reset(__f);
1193
1194                 if (f->file_name) {
1195                         __f->file_name = smalloc_strdup(f->file_name);
1196                         if (!__f->file_name) {
1197                                 log_err("fio: smalloc OOM\n");
1198                                 assert(0);
1199                         }
1200
1201                         __f->filetype = f->filetype;
1202                 }
1203
1204                 td->files[i] = __f;
1205         }
1206 }
1207
1208 /*
1209  * Returns the index that matches the filename, or -1 if not there
1210  */
1211 int get_fileno(struct thread_data *td, const char *fname)
1212 {
1213         struct fio_file *f;
1214         unsigned int i;
1215
1216         for_each_file(td, f, i)
1217                 if (!strcmp(f->file_name, fname))
1218                         return i;
1219
1220         return -1;
1221 }
1222
1223 /*
1224  * For log usage, where we add/open/close files automatically
1225  */
1226 void free_release_files(struct thread_data *td)
1227 {
1228         close_files(td);
1229         td->files_index = 0;
1230         td->nr_normal_files = 0;
1231 }