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 #include "hash.h"
  16 #include "lib/axmap.h"
  17
  18 #ifdef CONFIG_LINUX_FALLOCATE
  19 #include <linux/falloc.h>
  20 #endif
  21
  22 static int root_warn;
  23
  24 static inline void clear_error(struct thread_data *td)
  25 {
  26         td->error = 0;
  27         td->verror[0] = '\0';
  28 }
  29
  30 /*
  31  * Leaves f->fd open on success, caller must close
  32  */
  33 static int extend_file(struct thread_data *td, struct fio_file *f)
  34 {
  35         int r, new_layout = 0, unlink_file = 0, flags;
  36         unsigned long long left;
  37         unsigned int bs;
  38         char *b;
  39
  40         if (read_only) {
  41                 log_err("fio: refusing extend of file due to read-only\n");
  42                 return 0;
  43         }
  44
  45         /*
  46          * check if we need to lay the file out complete again. fio
  47          * does that for operations involving reads, or for writes
  48          * where overwrite is set
  49          */
  50         if (td_read(td) || (td_write(td) && td->o.overwrite) ||
  51             (td_write(td) && td->io_ops->flags & FIO_NOEXTEND))
  52                 new_layout = 1;
  53         if (td_write(td) && !td->o.overwrite)
  54                 unlink_file = 1;
  55
  56         if (unlink_file || new_layout) {
  57                 dprint(FD_FILE, "layout unlink %s\n", f->file_name);
  58                 if ((unlink(f->file_name) < 0) && (errno != ENOENT)) {
  59                         td_verror(td, errno, "unlink");
  60                         return 1;
  61                 }
  62         }
  63
  64         flags = O_WRONLY | O_CREAT;
  65         if (new_layout)
  66                 flags |= O_TRUNC;
  67
  68         dprint(FD_FILE, "open file %s, flags %x\n", f->file_name, flags);
  69         f->fd = open(f->file_name, flags, 0644);
  70         if (f->fd < 0) {
  71                 td_verror(td, errno, "open");
  72                 return 1;
  73         }
  74
  75 #ifdef CONFIG_POSIX_FALLOCATE
  76         if (!td->o.fill_device) {
  77                 switch (td->o.fallocate_mode) {
  78                 case FIO_FALLOCATE_NONE:
  79                         break;
  80                 case FIO_FALLOCATE_POSIX:
  81                         dprint(FD_FILE, "posix_fallocate file %s size %llu\n",
  82                                  f->file_name,
  83                                  (unsigned long long) f->real_file_size);
  84
  85                         r = posix_fallocate(f->fd, 0, f->real_file_size);
  86                         if (r > 0) {
  87                                 log_err("fio: posix_fallocate fails: %s\n",
  88                                                 strerror(r));
  89                         }
  90                         break;
  91 #ifdef CONFIG_LINUX_FALLOCATE
  92                 case FIO_FALLOCATE_KEEP_SIZE:
  93                         dprint(FD_FILE,
  94                                 "fallocate(FALLOC_FL_KEEP_SIZE) "
  95                                 "file %s size %llu\n", f->file_name,
  96                                 (unsigned long long) f->real_file_size);
  97
  98                         r = fallocate(f->fd, FALLOC_FL_KEEP_SIZE, 0,
  99                                         f->real_file_size);
 100                         if (r != 0)
 101                                 td_verror(td, errno, "fallocate");
 102
 103                         break;
 104 #endif /* CONFIG_LINUX_FALLOCATE */
 105                 default:
 106                         log_err("fio: unknown fallocate mode: %d\n",
 107                                 td->o.fallocate_mode);
 108                         assert(0);
 109                 }
 110         }
 111 #endif /* CONFIG_POSIX_FALLOCATE */
 112
 113         if (!new_layout)
 114                 goto done;
 115
 116         /*
 117          * The size will be -1ULL when fill_device is used, so don't truncate
 118          * or fallocate this file, just write it
 119          */
 120         if (!td->o.fill_device) {
 121                 dprint(FD_FILE, "truncate file %s, size %llu\n", f->file_name,
 122                                         (unsigned long long) f->real_file_size);
 123                 if (ftruncate(f->fd, f->real_file_size) == -1) {
 124                         if (errno != EFBIG) {
 125                                 td_verror(td, errno, "ftruncate");
 126                                 goto err;
 127                         }
 128                 }
 129         }
 130
 131         b = malloc(td->o.max_bs[DDIR_WRITE]);
 132
 133         left = f->real_file_size;
 134         while (left && !td->terminate) {
 135                 bs = td->o.max_bs[DDIR_WRITE];
 136                 if (bs > left)
 137                         bs = left;
 138
 139                 fill_io_buffer(td, b, bs, bs);
 140
 141                 r = write(f->fd, b, bs);
 142
 143                 if (r > 0) {
 144                         left -= r;
 145                         continue;
 146                 } else {
 147                         if (r < 0) {
 148                                 int __e = errno;
 149
 150                                 if (__e == ENOSPC) {
 151                                         if (td->o.fill_device)
 152                                                 break;
 153                                         log_info("fio: ENOSPC on laying out "
 154                                                  "file, stopping\n");
 155                                         break;
 156                                 }
 157                                 td_verror(td, errno, "write");
 158                         } else
 159                                 td_verror(td, EIO, "write");
 160
 161                         break;
 162                 }
 163         }
 164
 165         if (td->terminate) {
 166                 dprint(FD_FILE, "terminate unlink %s\n", f->file_name);
 167                 unlink(f->file_name);
 168         } else if (td->o.create_fsync) {
 169                 if (fsync(f->fd) < 0) {
 170                         td_verror(td, errno, "fsync");
 171                         goto err;
 172                 }
 173         }
 174         if (td->o.fill_device && !td_write(td)) {
 175                 fio_file_clear_size_known(f);
 176                 if (td_io_get_file_size(td, f))
 177                         goto err;
 178                 if (f->io_size > f->real_file_size)
 179                         f->io_size = f->real_file_size;
 180         }
 181
 182         free(b);
 183 done:
 184         return 0;
 185 err:
 186         close(f->fd);
 187         f->fd = -1;
 188         return 1;
 189 }
 190
 191 static int pre_read_file(struct thread_data *td, struct fio_file *f)
 192 {
 193         int r, did_open = 0, old_runstate;
 194         unsigned long long left;
 195         unsigned int bs;
 196         char *b;
 197
 198         if (td->io_ops->flags & FIO_PIPEIO)
 199                 return 0;
 200
 201         if (!fio_file_open(f)) {
 202                 if (td->io_ops->open_file(td, f)) {
 203                         log_err("fio: cannot pre-read, failed to open file\n");
 204                         return 1;
 205                 }
 206                 did_open = 1;
 207         }
 208
 209         old_runstate = td->runstate;
 210         td_set_runstate(td, TD_PRE_READING);
 211
 212         bs = td->o.max_bs[DDIR_READ];
 213         b = malloc(bs);
 214         memset(b, 0, bs);
 215
 216         lseek(f->fd, f->file_offset, SEEK_SET);
 217         left = f->io_size;
 218
 219         while (left && !td->terminate) {
 220                 if (bs > left)
 221                         bs = left;
 222
 223                 r = read(f->fd, b, bs);
 224
 225                 if (r == (int) bs) {
 226                         left -= bs;
 227                         continue;
 228                 } else {
 229                         td_verror(td, EIO, "pre_read");
 230                         break;
 231                 }
 232         }
 233
 234         td_set_runstate(td, old_runstate);
 235
 236         if (did_open)
 237                 td->io_ops->close_file(td, f);
 238         free(b);
 239         return 0;
 240 }
 241
 242 static unsigned long long get_rand_file_size(struct thread_data *td)
 243 {
 244         unsigned long long ret, sized;
 245         unsigned long r;
 246
 247         if (td->o.use_os_rand) {
 248                 r = os_random_long(&td->file_size_state);
 249                 sized = td->o.file_size_high - td->o.file_size_low;
 250                 ret = (unsigned long long) ((double) sized * (r / (OS_RAND_MAX + 1.0)));
 251         } else {
 252                 r = __rand(&td->__file_size_state);
 253                 sized = td->o.file_size_high - td->o.file_size_low;
 254                 ret = (unsigned long long) ((double) sized * (r / (FRAND_MAX + 1.0)));
 255         }
 256
 257         ret += td->o.file_size_low;
 258         ret -= (ret % td->o.rw_min_bs);
 259         return ret;
 260 }
 261
 262 static int file_size(struct thread_data *td, struct fio_file *f)
 263 {
 264         struct stat st;
 265
 266         if (stat(f->file_name, &st) == -1) {
 267                 td_verror(td, errno, "fstat");
 268                 return 1;
 269         }
 270
 271         f->real_file_size = st.st_size;
 272         return 0;
 273 }
 274
 275 static int bdev_size(struct thread_data *td, struct fio_file *f)
 276 {
 277         unsigned long long bytes = 0;
 278         int r;
 279
 280         if (td->io_ops->open_file(td, f)) {
 281                 log_err("fio: failed opening blockdev %s for size check\n",
 282                         f->file_name);
 283                 return 1;
 284         }
 285
 286         r = blockdev_size(f, &bytes);
 287         if (r) {
 288                 td_verror(td, r, "blockdev_size");
 289                 goto err;
 290         }
 291
 292         if (!bytes) {
 293                 log_err("%s: zero sized block device?\n", f->file_name);
 294                 goto err;
 295         }
 296
 297         f->real_file_size = bytes;
 298         td->io_ops->close_file(td, f);
 299         return 0;
 300 err:
 301         td->io_ops->close_file(td, f);
 302         return 1;
 303 }
 304
 305 static int char_size(struct thread_data *td, struct fio_file *f)
 306 {
 307 #ifdef FIO_HAVE_CHARDEV_SIZE
 308         unsigned long long bytes = 0;
 309         int r;
 310
 311         if (td->io_ops->open_file(td, f)) {
 312                 log_err("fio: failed opening blockdev %s for size check\n",
 313                         f->file_name);
 314                 return 1;
 315         }
 316
 317         r = chardev_size(f, &bytes);
 318         if (r) {
 319                 td_verror(td, r, "chardev_size");
 320                 goto err;
 321         }
 322
 323         if (!bytes) {
 324                 log_err("%s: zero sized char device?\n", f->file_name);
 325                 goto err;
 326         }
 327
 328         f->real_file_size = bytes;
 329         td->io_ops->close_file(td, f);
 330         return 0;
 331 err:
 332         td->io_ops->close_file(td, f);
 333         return 1;
 334 #else
 335         f->real_file_size = -1ULL;
 336         return 0;
 337 #endif
 338 }
 339
 340 static int get_file_size(struct thread_data *td, struct fio_file *f)
 341 {
 342         int ret = 0;
 343
 344         if (fio_file_size_known(f))
 345                 return 0;
 346
 347         if (f->filetype == FIO_TYPE_FILE)
 348                 ret = file_size(td, f);
 349         else if (f->filetype == FIO_TYPE_BD)
 350                 ret = bdev_size(td, f);
 351         else if (f->filetype == FIO_TYPE_CHAR)
 352                 ret = char_size(td, f);
 353         else
 354                 f->real_file_size = -1;
 355
 356         if (ret)
 357                 return ret;
 358
 359         if (f->file_offset > f->real_file_size) {
 360                 log_err("%s: offset extends end (%llu > %llu)\n", td->o.name,
 361                                         (unsigned long long) f->file_offset,
 362                                         (unsigned long long) f->real_file_size);
 363                 return 1;
 364         }
 365
 366         fio_file_set_size_known(f);
 367         return 0;
 368 }
 369
 370 static int __file_invalidate_cache(struct thread_data *td, struct fio_file *f,
 371                                    unsigned long long off,
 372                                    unsigned long long len)
 373 {
 374         int ret = 0;
 375
 376         if (len == -1ULL)
 377                 len = f->io_size;
 378         if (off == -1ULL)
 379                 off = f->file_offset;
 380
 381         if (len == -1ULL || off == -1ULL)
 382                 return 0;
 383
 384         dprint(FD_IO, "invalidate cache %s: %llu/%llu\n", f->file_name, off,
 385                                                                 len);
 386
 387         /*
 388          * FIXME: add blockdev flushing too
 389          */
 390         if (f->mmap_ptr) {
 391                 ret = posix_madvise(f->mmap_ptr, f->mmap_sz, POSIX_MADV_DONTNEED);
 392 #ifdef FIO_MADV_FREE
 393                 if (f->filetype == FIO_TYPE_BD)
 394                         (void) posix_madvise(f->mmap_ptr, f->mmap_sz, FIO_MADV_FREE);
 395 #endif
 396         } else if (f->filetype == FIO_TYPE_FILE) {
 397                 ret = posix_fadvise(f->fd, off, len, POSIX_FADV_DONTNEED);
 398         } else if (f->filetype == FIO_TYPE_BD) {
 399                 ret = blockdev_invalidate_cache(f);
 400                 if (ret < 0 && errno == EACCES && geteuid()) {
 401                         if (!root_warn) {
 402                                 log_err("fio: only root may flush block "
 403                                         "devices. Cache flush bypassed!\n");
 404                                 root_warn = 1;
 405                         }
 406                         ret = 0;
 407                 }
 408         } else if (f->filetype == FIO_TYPE_CHAR || f->filetype == FIO_TYPE_PIPE)
 409                 ret = 0;
 410
 411         if (ret < 0) {
 412                 td_verror(td, errno, "invalidate_cache");
 413                 return 1;
 414         } else if (ret > 0) {
 415                 td_verror(td, ret, "invalidate_cache");
 416                 return 1;
 417         }
 418
 419         return ret;
 420
 421 }
 422
 423 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
 424 {
 425         if (!fio_file_open(f))
 426                 return 0;
 427
 428         return __file_invalidate_cache(td, f, -1ULL, -1ULL);
 429 }
 430
 431 int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
 432 {
 433         int ret = 0;
 434
 435         dprint(FD_FILE, "fd close %s\n", f->file_name);
 436
 437         remove_file_hash(f);
 438
 439         if (close(f->fd) < 0)
 440                 ret = errno;
 441
 442         f->fd = -1;
 443
 444         if (f->shadow_fd != -1) {
 445                 close(f->shadow_fd);
 446                 f->shadow_fd = -1;
 447         }
 448
 449         f->engine_data = 0;
 450         return ret;
 451 }
 452
 453 int file_lookup_open(struct fio_file *f, int flags)
 454 {
 455         struct fio_file *__f;
 456         int from_hash;
 457
 458         __f = lookup_file_hash(f->file_name);
 459         if (__f) {
 460                 dprint(FD_FILE, "found file in hash %s\n", f->file_name);
 461                 /*
 462                  * racy, need the __f->lock locked
 463                  */
 464                 f->lock = __f->lock;
 465                 from_hash = 1;
 466         } else {
 467                 dprint(FD_FILE, "file not found in hash %s\n", f->file_name);
 468                 from_hash = 0;
 469         }
 470
 471         f->fd = open(f->file_name, flags, 0600);
 472         return from_hash;
 473 }
 474
 475 static int file_close_shadow_fds(struct thread_data *td)
 476 {
 477         struct fio_file *f;
 478         int num_closed = 0;
 479         unsigned int i;
 480
 481         for_each_file(td, f, i) {
 482                 if (f->shadow_fd == -1)
 483                         continue;
 484
 485                 close(f->shadow_fd);
 486                 f->shadow_fd = -1;
 487                 num_closed++;
 488         }
 489
 490         return num_closed;
 491 }
 492
 493 int generic_open_file(struct thread_data *td, struct fio_file *f)
 494 {
 495         int is_std = 0;
 496         int flags = 0;
 497         int from_hash = 0;
 498
 499         dprint(FD_FILE, "fd open %s\n", f->file_name);
 500
 501         if (td_trim(td) && f->filetype != FIO_TYPE_BD) {
 502                 log_err("fio: trim only applies to block device\n");
 503                 return 1;
 504         }
 505
 506         if (!strcmp(f->file_name, "-")) {
 507                 if (td_rw(td)) {
 508                         log_err("fio: can't read/write to stdin/out\n");
 509                         return 1;
 510                 }
 511                 is_std = 1;
 512
 513                 /*
 514                  * move output logging to stderr, if we are writing to stdout
 515                  */
 516                 if (td_write(td))
 517                         f_out = stderr;
 518         }
 519
 520         if (td_trim(td))
 521                 goto skip_flags;
 522         if (td->o.odirect)
 523                 flags |= OS_O_DIRECT;
 524         if (td->o.oatomic) {
 525                 if (!FIO_O_ATOMIC) {
 526                         td_verror(td, EINVAL, "OS does not support atomic IO");
 527                         return 1;
 528                 }
 529                 flags |= OS_O_DIRECT | FIO_O_ATOMIC;
 530         }
 531         if (td->o.sync_io)
 532                 flags |= O_SYNC;
 533         if (td->o.create_on_open)
 534                 flags |= O_CREAT;
 535 skip_flags:
 536         if (f->filetype != FIO_TYPE_FILE)
 537                 flags |= FIO_O_NOATIME;
 538
 539 open_again:
 540         if (td_write(td)) {
 541                 if (!read_only)
 542                         flags |= O_RDWR;
 543
 544                 if (f->filetype == FIO_TYPE_FILE)
 545                         flags |= O_CREAT;
 546
 547                 if (is_std)
 548                         f->fd = dup(STDOUT_FILENO);
 549                 else
 550                         from_hash = file_lookup_open(f, flags);
 551         } else if (td_read(td)) {
 552                 if (f->filetype == FIO_TYPE_CHAR && !read_only)
 553                         flags |= O_RDWR;
 554                 else
 555                         flags |= O_RDONLY;
 556
 557                 if (is_std)
 558                         f->fd = dup(STDIN_FILENO);
 559                 else
 560                         from_hash = file_lookup_open(f, flags);
 561         } else { //td trim
 562                 flags |= O_RDWR;
 563                 from_hash = file_lookup_open(f, flags);
 564         }
 565
 566         if (f->fd == -1) {
 567                 char buf[FIO_VERROR_SIZE];
 568                 int __e = errno;
 569
 570                 if (__e == EPERM && (flags & FIO_O_NOATIME)) {
 571                         flags &= ~FIO_O_NOATIME;
 572                         goto open_again;
 573                 }
 574                 if (__e == EMFILE && file_close_shadow_fds(td))
 575                         goto open_again;
 576
 577                 snprintf(buf, sizeof(buf), "open(%s)", f->file_name);
 578
 579                 if (__e == EINVAL && (flags & OS_O_DIRECT)) {
 580                         log_err("fio: looks like your file system does not " \
 581                                 "support direct=1/buffered=0\n");
 582                 }
 583
 584                 td_verror(td, __e, buf);
 585         }
 586
 587         if (!from_hash && f->fd != -1) {
 588                 if (add_file_hash(f)) {
 589                         int fio_unused ret;
 590
 591                         /*
 592                          * Stash away descriptor for later close. This is to
 593                          * work-around a "feature" on Linux, where a close of
 594                          * an fd that has been opened for write will trigger
 595                          * udev to call blkid to check partitions, fs id, etc.
 596                          * That pollutes the device cache, which can slow down
 597                          * unbuffered accesses.
 598                          */
 599                         if (f->shadow_fd == -1)
 600                                 f->shadow_fd = f->fd;
 601                         else {
 602                                 /*
 603                                  * OK to ignore, we haven't done anything
 604                                  * with it
 605                                  */
 606                                 ret = generic_close_file(td, f);
 607                         }
 608                         goto open_again;
 609                 }
 610         }
 611
 612         return 0;
 613 }
 614
 615 int generic_get_file_size(struct thread_data *td, struct fio_file *f)
 616 {
 617         return get_file_size(td, f);
 618 }
 619
 620 /*
 621  * open/close all files, so that ->real_file_size gets set
 622  */
 623 static int get_file_sizes(struct thread_data *td)
 624 {
 625         struct fio_file *f;
 626         unsigned int i;
 627         int err = 0;
 628
 629         for_each_file(td, f, i) {
 630                 dprint(FD_FILE, "get file size for %p/%d/%p\n", f, i,
 631                                                                 f->file_name);
 632
 633                 if (td_io_get_file_size(td, f)) {
 634                         if (td->error != ENOENT) {
 635                                 log_err("%s\n", td->verror);
 636                                 err = 1;
 637                         }
 638                         clear_error(td);
 639                 }
 640
 641                 if (f->real_file_size == -1ULL && td->o.size)
 642                         f->real_file_size = td->o.size / td->o.nr_files;
 643         }
 644
 645         return err;
 646 }
 647
 648 struct fio_mount {
 649         struct flist_head list;
 650         const char *base;
 651         char __base[256];
 652         unsigned int key;
 653 };
 654
 655 /*
 656  * Get free number of bytes for each file on each unique mount.
 657  */
 658 static unsigned long long get_fs_free_counts(struct thread_data *td)
 659 {
 660         struct flist_head *n, *tmp;
 661         unsigned long long ret = 0;
 662         struct fio_mount *fm;
 663         FLIST_HEAD(list);
 664         struct fio_file *f;
 665         unsigned int i;
 666
 667         for_each_file(td, f, i) {
 668                 struct stat sb;
 669                 char buf[256];
 670
 671                 if (f->filetype == FIO_TYPE_BD || f->filetype == FIO_TYPE_CHAR) {
 672                         if (f->real_file_size != -1ULL)
 673                                 ret += f->real_file_size;
 674                         continue;
 675                 } else if (f->filetype != FIO_TYPE_FILE)
 676                         continue;
 677
 678                 strcpy(buf, f->file_name);
 679
 680                 if (stat(buf, &sb) < 0) {
 681                         if (errno != ENOENT)
 682                                 break;
 683                         strcpy(buf, ".");
 684                         if (stat(buf, &sb) < 0)
 685                                 break;
 686                 }
 687
 688                 fm = NULL;
 689                 flist_for_each(n, &list) {
 690                         fm = flist_entry(n, struct fio_mount, list);
 691                         if (fm->key == sb.st_dev)
 692                                 break;
 693
 694                         fm = NULL;
 695                 }
 696
 697                 if (fm)
 698                         continue;
 699
 700                 fm = malloc(sizeof(*fm));
 701                 strcpy(fm->__base, buf);
 702                 fm->base = basename(fm->__base);
 703                 fm->key = sb.st_dev;
 704                 flist_add(&fm->list, &list);
 705         }
 706
 707         flist_for_each_safe(n, tmp, &list) {
 708                 unsigned long long sz;
 709
 710                 fm = flist_entry(n, struct fio_mount, list);
 711                 flist_del(&fm->list);
 712
 713                 sz = get_fs_size(fm->base);
 714                 if (sz && sz != -1ULL)
 715                         ret += sz;
 716
 717                 free(fm);
 718         }
 719
 720         return ret;
 721 }
 722
 723 uint64_t get_start_offset(struct thread_data *td)
 724 {
 725         return td->o.start_offset +
 726                 (td->thread_number - 1) * td->o.offset_increment;
 727 }
 728
 729 /*
 730  * Open the files and setup files sizes, creating files if necessary.
 731  */
 732 int setup_files(struct thread_data *td)
 733 {
 734         unsigned long long total_size, extend_size;
 735         struct thread_options *o = &td->o;
 736         struct fio_file *f;
 737         unsigned int i;
 738         int err = 0, need_extend;
 739         int old_state;
 740
 741         dprint(FD_FILE, "setup files\n");
 742
 743         old_state = td->runstate;
 744         td_set_runstate(td, TD_SETTING_UP);
 745
 746         if (o->read_iolog_file)
 747                 goto done;
 748
 749         /*
 750          * if ioengine defines a setup() method, it's responsible for
 751          * opening the files and setting f->real_file_size to indicate
 752          * the valid range for that file.
 753          */
 754         if (td->io_ops->setup)
 755                 err = td->io_ops->setup(td);
 756         else
 757                 err = get_file_sizes(td);
 758
 759         if (err)
 760                 goto err_out;
 761
 762         /*
 763          * check sizes. if the files/devices do not exist and the size
 764          * isn't passed to fio, abort.
 765          */
 766         total_size = 0;
 767         for_each_file(td, f, i) {
 768                 if (f->real_file_size == -1ULL)
 769                         total_size = -1ULL;
 770                 else
 771                         total_size += f->real_file_size;
 772         }
 773
 774         if (o->fill_device)
 775                 td->fill_device_size = get_fs_free_counts(td);
 776
 777         /*
 778          * device/file sizes are zero and no size given, punt
 779          */
 780         if ((!total_size || total_size == -1ULL) && !o->size &&
 781             !(td->io_ops->flags & FIO_NOIO) && !o->fill_device &&
 782             !(o->nr_files && (o->file_size_low || o->file_size_high))) {
 783                 log_err("%s: you need to specify size=\n", o->name);
 784                 td_verror(td, EINVAL, "total_file_size");
 785                 goto err_out;
 786         }
 787
 788         /*
 789          * now file sizes are known, so we can set ->io_size. if size= is
 790          * not given, ->io_size is just equal to ->real_file_size. if size
 791          * is given, ->io_size is size / nr_files.
 792          */
 793         extend_size = total_size = 0;
 794         need_extend = 0;
 795         for_each_file(td, f, i) {
 796                 f->file_offset = get_start_offset(td);
 797
 798                 if (!o->file_size_low) {
 799                         /*
 800                          * no file size range given, file size is equal to
 801                          * total size divided by number of files. if that is
 802                          * zero, set it to the real file size.
 803                          */
 804                         f->io_size = o->size / o->nr_files;
 805                         if (!f->io_size)
 806                                 f->io_size = f->real_file_size - f->file_offset;
 807                 } else if (f->real_file_size < o->file_size_low ||
 808                            f->real_file_size > o->file_size_high) {
 809                         if (f->file_offset > o->file_size_low)
 810                                 goto err_offset;
 811                         /*
 812                          * file size given. if it's fixed, use that. if it's a
 813                          * range, generate a random size in-between.
 814                          */
 815                         if (o->file_size_low == o->file_size_high)
 816                                 f->io_size = o->file_size_low - f->file_offset;
 817                         else {
 818                                 f->io_size = get_rand_file_size(td)
 819                                                 - f->file_offset;
 820                         }
 821                 } else
 822                         f->io_size = f->real_file_size - f->file_offset;
 823
 824                 if (f->io_size == -1ULL)
 825                         total_size = -1ULL;
 826                 else {
 827                         if (o->size_percent)
 828                                 f->io_size = (f->io_size * o->size_percent) / 100;
 829                         total_size += f->io_size;
 830                 }
 831
 832                 if (f->filetype == FIO_TYPE_FILE &&
 833                     (f->io_size + f->file_offset) > f->real_file_size &&
 834                     !(td->io_ops->flags & FIO_DISKLESSIO)) {
 835                         if (!o->create_on_open) {
 836                                 need_extend++;
 837                                 extend_size += (f->io_size + f->file_offset);
 838                         } else
 839                                 f->real_file_size = f->io_size + f->file_offset;
 840                         fio_file_set_extend(f);
 841                 }
 842         }
 843
 844         if (!o->size || o->size > total_size)
 845                 o->size = total_size;
 846
 847         /*
 848          * See if we need to extend some files
 849          */
 850         if (need_extend) {
 851                 temp_stall_ts = 1;
 852                 if (output_format == FIO_OUTPUT_NORMAL)
 853                         log_info("%s: Laying out IO file(s) (%u file(s) /"
 854                                  " %lluMB)\n", o->name, need_extend,
 855                                         extend_size >> 20);
 856
 857                 for_each_file(td, f, i) {
 858                         unsigned long long old_len = -1ULL, extend_len = -1ULL;
 859
 860                         if (!fio_file_extend(f))
 861                                 continue;
 862
 863                         assert(f->filetype == FIO_TYPE_FILE);
 864                         fio_file_clear_extend(f);
 865                         if (!o->fill_device) {
 866                                 old_len = f->real_file_size;
 867                                 extend_len = f->io_size + f->file_offset -
 868                                                 old_len;
 869                         }
 870                         f->real_file_size = (f->io_size + f->file_offset);
 871                         err = extend_file(td, f);
 872                         if (err)
 873                                 break;
 874
 875                         err = __file_invalidate_cache(td, f, old_len,
 876                                                                 extend_len);
 877                         close(f->fd);
 878                         f->fd = -1;
 879                         if (err)
 880                                 break;
 881                 }
 882                 temp_stall_ts = 0;
 883         }
 884
 885         if (err)
 886                 goto err_out;
 887
 888         if (!o->zone_size)
 889                 o->zone_size = o->size;
 890
 891         /*
 892          * iolog already set the total io size, if we read back
 893          * stored entries.
 894          */
 895         if (!o->read_iolog_file)
 896                 td->total_io_size = o->size * o->loops;
 897
 898 done:
 899         if (o->create_only)
 900                 td->done = 1;
 901
 902         td_set_runstate(td, old_state);
 903         return 0;
 904 err_offset:
 905         log_err("%s: you need to specify valid offset=\n", o->name);
 906 err_out:
 907         td_set_runstate(td, old_state);
 908         return 1;
 909 }
 910
 911 int pre_read_files(struct thread_data *td)
 912 {
 913         struct fio_file *f;
 914         unsigned int i;
 915
 916         dprint(FD_FILE, "pre_read files\n");
 917
 918         for_each_file(td, f, i) {
 919                 pre_read_file(td, f);
 920         }
 921
 922         return 1;
 923 }
 924
 925 static int __init_rand_distribution(struct thread_data *td, struct fio_file *f)
 926 {
 927         unsigned int range_size, seed;
 928         unsigned long nranges;
 929         uint64_t file_size;
 930
 931         range_size = min(td->o.min_bs[DDIR_READ], td->o.min_bs[DDIR_WRITE]);
 932         file_size = min(f->real_file_size, f->io_size);
 933
 934         nranges = (file_size + range_size - 1) / range_size;
 935
 936         seed = jhash(f->file_name, strlen(f->file_name), 0) * td->thread_number;
 937         if (!td->o.rand_repeatable)
 938                 seed = td->rand_seeds[4];
 939
 940         if (td->o.random_distribution == FIO_RAND_DIST_ZIPF)
 941                 zipf_init(&f->zipf, nranges, td->o.zipf_theta.u.f, seed);
 942         else
 943                 pareto_init(&f->zipf, nranges, td->o.pareto_h.u.f, seed);
 944
 945         return 1;
 946 }
 947
 948 static int init_rand_distribution(struct thread_data *td)
 949 {
 950         struct fio_file *f;
 951         unsigned int i;
 952         int state;
 953
 954         if (td->o.random_distribution == FIO_RAND_DIST_RANDOM)
 955                 return 0;
 956
 957         state = td->runstate;
 958         td_set_runstate(td, TD_SETTING_UP);
 959         for_each_file(td, f, i)
 960                 __init_rand_distribution(td, f);
 961         td_set_runstate(td, state);
 962
 963         return 1;
 964 }
 965
 966 int init_random_map(struct thread_data *td)
 967 {
 968         unsigned long long blocks;
 969         struct fio_file *f;
 970         unsigned int i;
 971
 972         if (init_rand_distribution(td))
 973                 return 0;
 974         if (!td_random(td))
 975                 return 0;
 976
 977         for_each_file(td, f, i) {
 978                 uint64_t file_size = min(f->real_file_size, f->io_size);
 979
 980                 blocks = file_size / (unsigned long long) td->o.rw_min_bs;
 981
 982                 if (td->o.random_generator == FIO_RAND_GEN_LFSR) {
 983                         unsigned long seed;
 984
 985                         seed = td->rand_seeds[FIO_RAND_BLOCK_OFF];
 986
 987                         if (!lfsr_init(&f->lfsr, blocks, seed, seed & 0xF))
 988                                 continue;
 989                 } else if (!td->o.norandommap) {
 990                         f->io_axmap = axmap_new(blocks);
 991                         if (f->io_axmap)
 992                                 continue;
 993                 } else if (td->o.norandommap)
 994                         continue;
 995
 996                 if (!td->o.softrandommap) {
 997                         log_err("fio: failed allocating random map. If running"
 998                                 " a large number of jobs, try the 'norandommap'"
 999                                 " option or set 'softrandommap'. Or give"
1000                                 " a larger --alloc-size to fio.\n");
1001                         return 1;
1002                 }
1003
1004                 log_info("fio: file %s failed allocating random map. Running "
1005                          "job without.\n", f->file_name);
1006         }
1007
1008         return 0;
1009 }
1010
1011 void close_files(struct thread_data *td)
1012 {
1013         struct fio_file *f;
1014         unsigned int i;
1015
1016         for_each_file(td, f, i) {
1017                 if (fio_file_open(f))
1018                         td_io_close_file(td, f);
1019         }
1020 }
1021
1022 void close_and_free_files(struct thread_data *td)
1023 {
1024         struct fio_file *f;
1025         unsigned int i;
1026
1027         dprint(FD_FILE, "close files\n");
1028
1029         for_each_file(td, f, i) {
1030                 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
1031                         dprint(FD_FILE, "free unlink %s\n", f->file_name);
1032                         unlink(f->file_name);
1033                 }
1034
1035                 if (fio_file_open(f))
1036                         td_io_close_file(td, f);
1037
1038                 remove_file_hash(f);
1039
1040                 sfree(f->file_name);
1041                 f->file_name = NULL;
1042                 axmap_free(f->io_axmap);
1043                 f->io_axmap = NULL;
1044                 sfree(f);
1045         }
1046
1047         td->o.filename = NULL;
1048         free(td->files);
1049         free(td->file_locks);
1050         td->files_index = 0;
1051         td->files = NULL;
1052         td->file_locks = NULL;
1053         td->o.file_lock_mode = FILE_LOCK_NONE;
1054         td->o.nr_files = 0;
1055 }
1056
1057 static void get_file_type(struct fio_file *f)
1058 {
1059         struct stat sb;
1060
1061         if (!strcmp(f->file_name, "-"))
1062                 f->filetype = FIO_TYPE_PIPE;
1063         else
1064                 f->filetype = FIO_TYPE_FILE;
1065
1066         /* \\.\ is the device namespace in Windows, where every file is
1067          * a block device */
1068         if (strncmp(f->file_name, "\\\\.\\", 4) == 0)
1069                 f->filetype = FIO_TYPE_BD;
1070
1071         if (!stat(f->file_name, &sb)) {
1072                 if (S_ISBLK(sb.st_mode))
1073                         f->filetype = FIO_TYPE_BD;
1074                 else if (S_ISCHR(sb.st_mode))
1075                         f->filetype = FIO_TYPE_CHAR;
1076                 else if (S_ISFIFO(sb.st_mode))
1077                         f->filetype = FIO_TYPE_PIPE;
1078         }
1079 }
1080
1081 int add_file(struct thread_data *td, const char *fname)
1082 {
1083         int cur_files = td->files_index;
1084         char file_name[PATH_MAX];
1085         struct fio_file *f;
1086         int len = 0;
1087
1088         dprint(FD_FILE, "add file %s\n", fname);
1089
1090         f = smalloc(sizeof(*f));
1091         if (!f) {
1092                 log_err("fio: smalloc OOM\n");
1093                 assert(0);
1094         }
1095
1096         f->fd = -1;
1097         f->shadow_fd = -1;
1098         fio_file_reset(td, f);
1099
1100         if (td->files_size <= td->files_index) {
1101                 unsigned int new_size = td->o.nr_files + 1;
1102
1103                 dprint(FD_FILE, "resize file array to %d files\n", new_size);
1104
1105                 td->files = realloc(td->files, new_size * sizeof(f));
1106                 if (td->files == NULL) {
1107                         log_err("fio: realloc OOM\n");
1108                         assert(0);
1109                 }
1110                 if (td->o.file_lock_mode != FILE_LOCK_NONE) {
1111                         td->file_locks = realloc(td->file_locks, new_size);
1112                         if (!td->file_locks) {
1113                                 log_err("fio: realloc OOM\n");
1114                                 assert(0);
1115                         }
1116                         td->file_locks[cur_files] = FILE_LOCK_NONE;
1117                 }
1118                 td->files_size = new_size;
1119         }
1120         td->files[cur_files] = f;
1121         f->fileno = cur_files;
1122
1123         /*
1124          * init function, io engine may not be loaded yet
1125          */
1126         if (td->io_ops && (td->io_ops->flags & FIO_DISKLESSIO))
1127                 f->real_file_size = -1ULL;
1128
1129         if (td->o.directory)
1130                 len = sprintf(file_name, "%s/", td->o.directory);
1131
1132         sprintf(file_name + len, "%s", fname);
1133         f->file_name = smalloc_strdup(file_name);
1134         if (!f->file_name) {
1135                 log_err("fio: smalloc OOM\n");
1136                 assert(0);
1137         }
1138
1139         get_file_type(f);
1140
1141         switch (td->o.file_lock_mode) {
1142         case FILE_LOCK_NONE:
1143                 break;
1144         case FILE_LOCK_READWRITE:
1145                 f->rwlock = fio_rwlock_init();
1146                 break;
1147         case FILE_LOCK_EXCLUSIVE:
1148                 f->lock = fio_mutex_init(FIO_MUTEX_UNLOCKED);
1149                 break;
1150         default:
1151                 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
1152                 assert(0);
1153         }
1154
1155         td->files_index++;
1156         if (f->filetype == FIO_TYPE_FILE)
1157                 td->nr_normal_files++;
1158
1159         dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name,
1160                                                         cur_files);
1161
1162         return cur_files;
1163 }
1164
1165 int add_file_exclusive(struct thread_data *td, const char *fname)
1166 {
1167         struct fio_file *f;
1168         unsigned int i;
1169
1170         for_each_file(td, f, i) {
1171                 if (!strcmp(f->file_name, fname))
1172                         return i;
1173         }
1174
1175         return add_file(td, fname);
1176 }
1177
1178 void get_file(struct fio_file *f)
1179 {
1180         dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
1181         assert(fio_file_open(f));
1182         f->references++;
1183 }
1184
1185 int put_file(struct thread_data *td, struct fio_file *f)
1186 {
1187         int f_ret = 0, ret = 0;
1188
1189         dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
1190
1191         if (!fio_file_open(f)) {
1192                 assert(f->fd == -1);
1193                 return 0;
1194         }
1195
1196         assert(f->references);
1197         if (--f->references)
1198                 return 0;
1199
1200         if (should_fsync(td) && td->o.fsync_on_close)
1201                 f_ret = fsync(f->fd);
1202
1203         if (td->io_ops->close_file)
1204                 ret = td->io_ops->close_file(td, f);
1205
1206         if (!ret)
1207                 ret = f_ret;
1208
1209         td->nr_open_files--;
1210         fio_file_clear_open(f);
1211         assert(f->fd == -1);
1212         return ret;
1213 }
1214
1215 void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
1216 {
1217         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1218                 return;
1219
1220         if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
1221                 if (ddir == DDIR_READ)
1222                         fio_rwlock_read(f->rwlock);
1223                 else
1224                         fio_rwlock_write(f->rwlock);
1225         } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1226                 fio_mutex_down(f->lock);
1227
1228         td->file_locks[f->fileno] = td->o.file_lock_mode;
1229 }
1230
1231 void unlock_file(struct thread_data *td, struct fio_file *f)
1232 {
1233         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1234                 return;
1235
1236         if (td->o.file_lock_mode == FILE_LOCK_READWRITE)
1237                 fio_rwlock_unlock(f->rwlock);
1238         else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1239                 fio_mutex_up(f->lock);
1240
1241         td->file_locks[f->fileno] = FILE_LOCK_NONE;
1242 }
1243
1244 void unlock_file_all(struct thread_data *td, struct fio_file *f)
1245 {
1246         if (td->o.file_lock_mode == FILE_LOCK_NONE)
1247                 return;
1248         if (td->file_locks[f->fileno] != FILE_LOCK_NONE)
1249                 unlock_file(td, f);
1250 }
1251
1252 static int recurse_dir(struct thread_data *td, const char *dirname)
1253 {
1254         struct dirent *dir;
1255         int ret = 0;
1256         DIR *D;
1257
1258         D = opendir(dirname);
1259         if (!D) {
1260                 char buf[FIO_VERROR_SIZE];
1261
1262                 snprintf(buf, FIO_VERROR_SIZE, "opendir(%s)", dirname);
1263                 td_verror(td, errno, buf);
1264                 return 1;
1265         }
1266
1267         while ((dir = readdir(D)) != NULL) {
1268                 char full_path[PATH_MAX];
1269                 struct stat sb;
1270
1271                 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
1272                         continue;
1273
1274                 sprintf(full_path, "%s%s%s", dirname, FIO_OS_PATH_SEPARATOR, dir->d_name);
1275
1276                 if (lstat(full_path, &sb) == -1) {
1277                         if (errno != ENOENT) {
1278                                 td_verror(td, errno, "stat");
1279                                 return 1;
1280                         }
1281                 }
1282
1283                 if (S_ISREG(sb.st_mode)) {
1284                         add_file(td, full_path);
1285                         td->o.nr_files++;
1286                         continue;
1287                 }
1288                 if (!S_ISDIR(sb.st_mode))
1289                         continue;
1290
1291                 ret = recurse_dir(td, full_path);
1292                 if (ret)
1293                         break;
1294         }
1295
1296         closedir(D);
1297         return ret;
1298 }
1299
1300 int add_dir_files(struct thread_data *td, const char *path)
1301 {
1302         int ret = recurse_dir(td, path);
1303
1304         if (!ret)
1305                 log_info("fio: opendir added %d files\n", td->o.nr_files);
1306
1307         return ret;
1308 }
1309
1310 void dup_files(struct thread_data *td, struct thread_data *org)
1311 {
1312         struct fio_file *f;
1313         unsigned int i;
1314
1315         dprint(FD_FILE, "dup files: %d\n", org->files_index);
1316
1317         if (!org->files)
1318                 return;
1319
1320         td->files = malloc(org->files_index * sizeof(f));
1321
1322         if (td->o.file_lock_mode != FILE_LOCK_NONE)
1323                 td->file_locks = malloc(org->files_index);
1324
1325         for_each_file(org, f, i) {
1326                 struct fio_file *__f;
1327
1328                 __f = smalloc(sizeof(*__f));
1329                 if (!__f) {
1330                         log_err("fio: smalloc OOM\n");
1331                         assert(0);
1332                 }
1333                 __f->fd = -1;
1334                 fio_file_reset(td, __f);
1335
1336                 if (f->file_name) {
1337                         __f->file_name = smalloc_strdup(f->file_name);
1338                         if (!__f->file_name) {
1339                                 log_err("fio: smalloc OOM\n");
1340                                 assert(0);
1341                         }
1342
1343                         __f->filetype = f->filetype;
1344                 }
1345
1346                 td->files[i] = __f;
1347         }
1348 }
1349
1350 /*
1351  * Returns the index that matches the filename, or -1 if not there
1352  */
1353 int get_fileno(struct thread_data *td, const char *fname)
1354 {
1355         struct fio_file *f;
1356         unsigned int i;
1357
1358         for_each_file(td, f, i)
1359                 if (!strcmp(f->file_name, fname))
1360                         return i;
1361
1362         return -1;
1363 }
1364
1365 /*
1366  * For log usage, where we add/open/close files automatically
1367  */
1368 void free_release_files(struct thread_data *td)
1369 {
1370         close_files(td);
1371         td->files_index = 0;
1372         td->nr_normal_files = 0;
1373 }
1374
1375 void fio_file_reset(struct thread_data *td, struct fio_file *f)
1376 {
1377         f->last_pos = f->file_offset;
1378         f->last_start = -1ULL;
1379         if (f->io_axmap)
1380                 axmap_reset(f->io_axmap);
1381         if (td->o.random_generator == FIO_RAND_GEN_LFSR)
1382                 lfsr_reset(&f->lfsr, td->rand_seeds[FIO_RAND_BLOCK_OFF]);
1383 }