filesetup.c

   1 #include <unistd.h>
   2 #include <fcntl.h>
   3 #include <string.h>
   4 #include <assert.h>
   5 #include <dirent.h>
   6 #include <sys/stat.h>
   7 #include <sys/mman.h>
   8 #include <sys/types.h>
   9
  10 #include "fio.h"
  11 #include "os.h"
  12
  13 /*
  14  * Check if the file exists and it's large enough.
  15  */
  16 static int file_ok(struct thread_data *td, struct fio_file *f)
  17 {
  18         struct stat st;
  19
  20         if (f->filetype != FIO_TYPE_FILE ||
  21             (td->io_ops->flags & FIO_DISKLESSIO))
  22                 return 0;
  23
  24         if (lstat(f->file_name, &st) == -1)
  25                 return 1;
  26
  27         /*
  28          * if it's a special file, size is always ok for now
  29          */
  30         if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))
  31                 return 0;
  32         if (st.st_size < (off_t) f->file_size)
  33                 return 1;
  34
  35         return 0;
  36 }
  37
  38 static int create_file(struct thread_data *td, struct fio_file *f)
  39 {
  40         unsigned long long left;
  41         unsigned int bs;
  42         char *b;
  43         int r;
  44
  45         f->fd = open(f->file_name, O_WRONLY | O_CREAT | O_TRUNC, 0644);
  46         if (f->fd < 0) {
  47                 td_verror(td, errno, "open");
  48                 return 1;
  49         }
  50
  51         if (ftruncate(f->fd, f->file_size) == -1) {
  52                 td_verror(td, errno, "ftruncate");
  53                 goto err;
  54         }
  55
  56         if (posix_fallocate(f->fd, 0, f->file_size) < 0) {
  57                 td_verror(td, errno, "posix_fallocate");
  58                 goto err;
  59         }
  60
  61         b = malloc(td->o.max_bs[DDIR_WRITE]);
  62         memset(b, 0, td->o.max_bs[DDIR_WRITE]);
  63
  64         left = f->file_size;
  65         while (left && !td->terminate) {
  66                 bs = td->o.max_bs[DDIR_WRITE];
  67                 if (bs > left)
  68                         bs = left;
  69
  70                 r = write(f->fd, b, bs);
  71
  72                 if (r == (int) bs) {
  73                         left -= bs;
  74                         continue;
  75                 } else {
  76                         if (r < 0)
  77                                 td_verror(td, errno, "write");
  78                         else
  79                                 td_verror(td, EIO, "write");
  80
  81                         break;
  82                 }
  83         }
  84
  85         if (td->terminate)
  86                 unlink(f->file_name);
  87         else if (td->o.create_fsync)
  88                 fsync(f->fd);
  89
  90         free(b);
  91         close(f->fd);
  92         f->fd = -1;
  93         return 0;
  94 err:
  95         close(f->fd);
  96         f->fd = -1;
  97         return 1;
  98 }
  99
 100 static unsigned long long set_rand_file_size(struct thread_data *td,
 101                                              unsigned long long total_size)
 102 {
 103         unsigned long long upper = total_size;
 104         unsigned long long ret;
 105         long r;
 106
 107         if (upper > td->o.file_size_high)
 108                 upper = td->o.file_size_high;
 109         else if (upper < td->o.file_size_low)
 110                 return 0;
 111         else if (!upper)
 112                 return 0;
 113
 114         r = os_random_long(&td->file_size_state);
 115         ret = td->o.file_size_low + (unsigned long long) ((double) upper * (r / (RAND_MAX + 1.0)));
 116         ret -= (ret % td->o.rw_min_bs);
 117         if (ret > upper)
 118                 ret = upper;
 119         return ret;
 120 }
 121
 122 static int fill_file_size(struct thread_data *td, struct fio_file *f,
 123                           unsigned long long *file_size, int new_files)
 124 {
 125         if (!td->o.file_size_low) {
 126                 f->file_size = *file_size / new_files;
 127                 f->real_file_size = f->file_size;
 128         } else {
 129                 /*
 130                  * If we don't have enough space left for a file
 131                  * of the minimum size, bail.
 132                  */
 133                 if (*file_size < td->o.file_size_low)
 134                         return 1;
 135
 136                 f->file_size = set_rand_file_size(td, *file_size);
 137                 f->real_file_size = f->file_size;
 138                 *file_size -= f->file_size;
 139         }
 140
 141         return 0;
 142 }
 143
 144 static int create_files(struct thread_data *td)
 145 {
 146         struct fio_file *f;
 147         int err, need_create, can_extend;
 148         unsigned long long total_file_size, local_file_size, create_size;
 149         unsigned int i, new_files;
 150
 151         new_files = 0;
 152         total_file_size = td->o.size;
 153         for_each_file(td, f, i) {
 154                 unsigned long long s;
 155
 156                 f->file_offset = td->o.start_offset;
 157
 158                 if (f->filetype != FIO_TYPE_FILE)
 159                         continue;
 160                 if (!total_file_size)
 161                         continue;
 162
 163                 if (f->flags & FIO_FILE_EXISTS) {
 164                         if ((f->file_size > td->o.size / td->o.nr_files) ||
 165                             !f->file_size)
 166                                 f->file_size = td->o.size / td->o.nr_files;
 167
 168                         s = f->file_size;
 169                         if (s > total_file_size)
 170                                 s = total_file_size;
 171
 172                         total_file_size -= s;
 173                 } else
 174                         new_files++;
 175         }
 176
 177         /*
 178          * unless specifically asked for overwrite, let normal io extend it
 179          */
 180         can_extend = !td->o.overwrite && !(td->io_ops->flags & FIO_NOEXTEND);
 181         if (can_extend && new_files) {
 182                 for_each_file(td, f, i) {
 183                         if (fill_file_size(td, f, &total_file_size, new_files)) {
 184                                 log_info("fio: limited to %d files\n", i);
 185                                 td->o.nr_files = i;
 186                                 break;
 187                         }
 188                 }
 189
 190                 return 0;
 191         }
 192
 193         local_file_size = total_file_size;
 194         if (!local_file_size)
 195                 local_file_size = -1;
 196
 197         total_file_size = 0;
 198         need_create = 0;
 199         create_size = 0;
 200         for_each_file(td, f, i) {
 201                 int file_there;
 202
 203                 if (f->filetype != FIO_TYPE_FILE)
 204                         continue;
 205                 if (f->flags & FIO_FILE_EXISTS) {
 206                         total_file_size += f->file_size;
 207                         continue;
 208                 }
 209
 210                 if (fill_file_size(td, f, &local_file_size, new_files)) {
 211                         log_info("fio: limited to %d files\n", i);
 212                         new_files -= (td->o.nr_files - i);
 213                         td->o.nr_files = i;
 214                         break;
 215                 }
 216
 217                 total_file_size += f->file_size;
 218                 create_size += f->file_size;
 219                 file_there = !file_ok(td, f);
 220
 221                 if (file_there && td_write(td) && !td->o.overwrite) {
 222                         unlink(f->file_name);
 223                         file_there = 0;
 224                 }
 225
 226                 need_create += !file_there;
 227         }
 228
 229         if (!need_create)
 230                 return 0;
 231
 232         if (!td->o.size && !total_file_size) {
 233                 log_err("Need size for create\n");
 234                 td_verror(td, EINVAL, "file_size");
 235                 return 1;
 236         }
 237
 238         temp_stall_ts = 1;
 239         log_info("%s: Laying out IO file(s) (%u files / %LuMiB)\n",
 240                                 td->o.name, new_files, create_size >> 20);
 241
 242         err = 0;
 243         for_each_file(td, f, i) {
 244                 /*
 245                  * Only unlink files that we created.
 246                  */
 247                 f->flags &= ~FIO_FILE_UNLINK;
 248                 if (file_ok(td, f)) {
 249                         if (td->o.unlink)
 250                                 f->flags |= FIO_FILE_UNLINK;
 251
 252                         f->flags |= FIO_FILE_NOSORT;
 253                         err = create_file(td, f);
 254                         if (err)
 255                                 break;
 256                 }
 257         }
 258
 259         temp_stall_ts = 0;
 260         return err;
 261 }
 262
 263 static int file_size(struct thread_data *td, struct fio_file *f)
 264 {
 265         struct stat st;
 266
 267         if (td->o.overwrite) {
 268                 if (fstat(f->fd, &st) == -1) {
 269                         td_verror(td, errno, "fstat");
 270                         return 1;
 271                 }
 272
 273                 f->real_file_size = st.st_size;
 274
 275                 if (!f->file_size || f->file_size > f->real_file_size)
 276                         f->file_size = f->real_file_size;
 277         } else
 278                 f->real_file_size = f->file_size;
 279
 280         return 0;
 281 }
 282
 283 static int bdev_size(struct thread_data *td, struct fio_file *f)
 284 {
 285         unsigned long long bytes;
 286         int r;
 287
 288         r = blockdev_size(f->fd, &bytes);
 289         if (r) {
 290                 td_verror(td, r, "blockdev_size");
 291                 return 1;
 292         }
 293
 294         f->real_file_size = bytes;
 295
 296         /*
 297          * no extend possibilities, so limit size to device size if too large
 298          */
 299         if (!f->file_size || f->file_size > f->real_file_size)
 300                 f->file_size = f->real_file_size;
 301
 302         f->file_size -= f->file_offset;
 303         return 0;
 304 }
 305
 306 static int get_file_size(struct thread_data *td, struct fio_file *f)
 307 {
 308         int ret = 0;
 309
 310         if (f->filetype == FIO_TYPE_FILE) {
 311                 if (!(f->flags & FIO_FILE_EXISTS))
 312                         ret = file_size(td, f);
 313         } else if (f->filetype == FIO_TYPE_BD)
 314                 ret = bdev_size(td, f);
 315         else
 316                 f->real_file_size = -1;
 317
 318         if (ret)
 319                 return ret;
 320
 321         if (f->file_offset > f->real_file_size) {
 322                 log_err("%s: offset extends end (%Lu > %Lu)\n", td->o.name, f->file_offset, f->real_file_size);
 323                 return 1;
 324         }
 325
 326         return 0;
 327 }
 328
 329 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
 330 {
 331         int ret = 0;
 332
 333         if (td->o.odirect)
 334                 return 0;
 335
 336         /*
 337          * FIXME: add blockdev flushing too
 338          */
 339         if (f->mmap)
 340                 ret = madvise(f->mmap, f->file_size, MADV_DONTNEED);
 341         else if (f->filetype == FIO_TYPE_FILE)
 342                 ret = fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_DONTNEED);
 343         else if (f->filetype == FIO_TYPE_BD)
 344                 ret = blockdev_invalidate_cache(f->fd);
 345         else if (f->filetype == FIO_TYPE_CHAR)
 346                 ret = 0;
 347
 348         if (ret < 0) {
 349                 td_verror(td, errno, "invalidate_cache");
 350                 return 1;
 351         }
 352
 353         return ret;
 354 }
 355
 356 void generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
 357 {
 358         close(f->fd);
 359         f->fd = -1;
 360 }
 361
 362 int generic_open_file(struct thread_data *td, struct fio_file *f)
 363 {
 364         int flags = 0;
 365
 366         if (td->o.odirect)
 367                 flags |= OS_O_DIRECT;
 368         if (td->o.sync_io)
 369                 flags |= O_SYNC;
 370
 371         if (td_write(td) || td_rw(td)) {
 372                 flags |= O_RDWR;
 373
 374                 if (f->filetype == FIO_TYPE_FILE)
 375                         flags |= O_CREAT;
 376
 377                 f->fd = open(f->file_name, flags, 0600);
 378         } else {
 379                 if (f->filetype == FIO_TYPE_CHAR)
 380                         flags |= O_RDWR;
 381                 else
 382                         flags |= O_RDONLY;
 383
 384                 f->fd = open(f->file_name, flags);
 385         }
 386
 387         if (f->fd == -1) {
 388                 char buf[FIO_VERROR_SIZE];
 389                 int __e = errno;
 390
 391                 snprintf(buf, sizeof(buf) - 1, "open(%s)", f->file_name);
 392
 393                 td_verror(td, __e, buf);
 394                 if (__e == EINVAL && td->o.odirect)
 395                         log_err("fio: destination does not support O_DIRECT\n");
 396                 if (__e == EMFILE)
 397                         log_err("fio: try reducing/setting openfiles (failed at %u of %u)\n", td->nr_open_files, td->o.nr_files);
 398                 return 1;
 399         }
 400
 401         if (get_file_size(td, f))
 402                 goto err;
 403
 404         if (td->o.invalidate_cache && file_invalidate_cache(td, f))
 405                 goto err;
 406
 407         if (!td->o.fadvise_hint)
 408                 return 0;
 409
 410         if (!td_random(td)) {
 411                 if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_SEQUENTIAL) < 0) {
 412                         td_verror(td, errno, "fadvise");
 413                         goto err;
 414                 }
 415         } else {
 416                 if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_RANDOM) < 0) {
 417                         td_verror(td, errno, "fadvise");
 418                         goto err;
 419                 }
 420         }
 421
 422         return 0;
 423 err:
 424         close(f->fd);
 425         return 1;
 426 }
 427
 428 int open_files(struct thread_data *td)
 429 {
 430         struct fio_file *f;
 431         unsigned int i;
 432         int err = 0;
 433
 434         for_each_file(td, f, i) {
 435                 err = td_io_open_file(td, f);
 436                 if (err)
 437                         break;
 438
 439                 if (td->o.open_files == td->nr_open_files)
 440                         break;
 441         }
 442
 443         if (!err)
 444                 return 0;
 445
 446         for_each_file(td, f, i)
 447                 td_io_close_file(td, f);
 448
 449         return err;
 450 }
 451
 452 int setup_files(struct thread_data *td)
 453 {
 454         struct fio_file *f;
 455         unsigned int i;
 456         int err;
 457
 458         /*
 459          * if ioengine defines a setup() method, it's responsible for
 460          * setting up everything in the td->files[] area.
 461          */
 462         if (td->io_ops->setup)
 463                 return td->io_ops->setup(td);
 464
 465         if (create_files(td))
 466                 return 1;
 467
 468         err = open_files(td);
 469         if (err)
 470                 return err;
 471
 472         /*
 473          * Recalculate the total file size now that files are set up.
 474          */
 475         td->o.size = 0;
 476         for_each_file(td, f, i)
 477                 td->o.size += f->file_size;
 478
 479         td->io_size = td->o.size;
 480         if (td->io_size == 0) {
 481                 log_err("%s: no io blocks\n", td->o.name);
 482                 td_verror(td, EINVAL, "total_file_size");
 483                 return 1;
 484         }
 485
 486         if (!td->o.zone_size)
 487                 td->o.zone_size = td->io_size;
 488
 489         td->total_io_size = td->io_size * td->o.loops;
 490
 491         for_each_file(td, f, i)
 492                 td_io_close_file(td, f);
 493
 494         return err;
 495 }
 496
 497 int init_random_map(struct thread_data *td)
 498 {
 499         int num_maps, blocks;
 500         struct fio_file *f;
 501         unsigned int i;
 502
 503         if (td->o.norandommap)
 504                 return 0;
 505
 506         for_each_file(td, f, i) {
 507                 blocks = (f->real_file_size + td->o.rw_min_bs - 1) / td->o.rw_min_bs;
 508                 num_maps = (blocks + BLOCKS_PER_MAP-1)/ BLOCKS_PER_MAP;
 509                 f->file_map = malloc(num_maps * sizeof(long));
 510                 if (!f->file_map) {
 511                         log_err("fio: failed allocating random map. If running a large number of jobs, try the 'norandommap' option\n");
 512                         return 1;
 513                 }
 514                 f->num_maps = num_maps;
 515                 memset(f->file_map, 0, num_maps * sizeof(long));
 516         }
 517
 518         return 0;
 519 }
 520
 521 void close_files(struct thread_data *td)
 522 {
 523         struct fio_file *f;
 524         unsigned int i;
 525
 526         for_each_file(td, f, i) {
 527                 if ((f->flags & FIO_FILE_UNLINK) &&
 528                     f->filetype == FIO_TYPE_FILE)
 529                         unlink(f->file_name);
 530
 531                 td_io_close_file(td, f);
 532
 533                 free(f->file_name);
 534                 f->file_name = NULL;
 535
 536                 if (f->file_map) {
 537                         free(f->file_map);
 538                         f->file_map = NULL;
 539                 }
 540         }
 541
 542         td->o.filename = NULL;
 543         free(td->files);
 544         td->files = NULL;
 545         td->o.nr_files = 0;
 546 }
 547
 548 static void get_file_type(struct fio_file *f)
 549 {
 550         struct stat sb;
 551
 552         f->filetype = FIO_TYPE_FILE;
 553
 554         if (!lstat(f->file_name, &sb)) {
 555                 f->flags |= FIO_FILE_EXISTS;
 556
 557                 if (S_ISBLK(sb.st_mode))
 558                         f->filetype = FIO_TYPE_BD;
 559                 else if (S_ISCHR(sb.st_mode))
 560                         f->filetype = FIO_TYPE_CHAR;
 561                 else {
 562                         /*
 563                          * might as well do this here, and save a stat later on
 564                          */
 565                         f->real_file_size = sb.st_size;
 566                         f->file_size = f->real_file_size;
 567                 }
 568         }
 569 }
 570
 571 void add_file(struct thread_data *td, const char *fname)
 572 {
 573         int cur_files = td->files_index;
 574         char file_name[PATH_MAX];
 575         struct fio_file *f;
 576         int len = 0;
 577
 578         td->files = realloc(td->files, (cur_files + 1) * sizeof(*f));
 579
 580         f = &td->files[cur_files];
 581         memset(f, 0, sizeof(*f));
 582         f->fd = -1;
 583
 584         if (td->o.directory)
 585                 len = sprintf(file_name, "%s/", td->o.directory);
 586
 587         sprintf(file_name + len, "%s", fname);
 588         f->file_name = strdup(file_name);
 589
 590         get_file_type(f);
 591
 592         td->files_index++;
 593         if (f->filetype == FIO_TYPE_FILE)
 594                 td->nr_normal_files++;
 595 }
 596
 597 void get_file(struct fio_file *f)
 598 {
 599         f->references++;
 600 }
 601
 602 void put_file(struct thread_data *td, struct fio_file *f)
 603 {
 604         if (!(f->flags & FIO_FILE_OPEN))
 605                 return;
 606
 607         assert(f->references);
 608         if (--f->references)
 609                 return;
 610
 611         if (should_fsync(td) && td->o.fsync_on_close)
 612                 fsync(f->fd);
 613
 614         if (td->io_ops->close_file)
 615                 td->io_ops->close_file(td, f);
 616         td->nr_open_files--;
 617         f->flags &= ~FIO_FILE_OPEN;
 618 }
 619
 620 static int recurse_dir(struct thread_data *td, const char *dirname)
 621 {
 622         struct dirent *dir;
 623         int ret = 0;
 624         DIR *D;
 625
 626         D = opendir(dirname);
 627         if (!D) {
 628                 td_verror(td, errno, "opendir");
 629                 return 1;
 630         }
 631
 632         while ((dir = readdir(D)) != NULL) {
 633                 char full_path[PATH_MAX];
 634                 struct stat sb;
 635
 636                 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
 637                         continue;
 638
 639                 sprintf(full_path, "%s/%s", dirname, dir->d_name);
 640
 641                 if (lstat(full_path, &sb) == -1) {
 642                         if (errno != ENOENT) {
 643                                 td_verror(td, errno, "stat");
 644                                 return 1;
 645                         }
 646                 }
 647
 648                 if (S_ISREG(sb.st_mode)) {
 649                         add_file(td, full_path);
 650                         td->o.nr_files++;
 651                         continue;
 652                 }
 653
 654                 if ((ret = recurse_dir(td, full_path)) != 0)
 655                         break;
 656         }
 657
 658         closedir(D);
 659         return ret;
 660 }
 661
 662 int add_dir_files(struct thread_data *td, const char *path)
 663 {
 664         return recurse_dir(td, path);
 665 }
 666
 667 void dup_files(struct thread_data *td, struct thread_data *org)
 668 {
 669         struct fio_file *f;
 670         unsigned int i;
 671         size_t bytes;
 672
 673         if (!org->files)
 674                 return;
 675
 676         bytes = org->files_index * sizeof(*f);
 677         td->files = malloc(bytes);
 678         memcpy(td->files, org->files, bytes);
 679
 680         for_each_file(td, f, i) {
 681                 if (f->file_name)
 682                         f->file_name = strdup(f->file_name);
 683         }
 684 }