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                         err = create_file(td, f);
 253                         if (err)
 254                                 break;
 255                 }
 256         }
 257
 258         temp_stall_ts = 0;
 259         return err;
 260 }
 261
 262 static int file_size(struct thread_data *td, struct fio_file *f)
 263 {
 264         struct stat st;
 265
 266         if (td->o.overwrite) {
 267                 if (fstat(f->fd, &st) == -1) {
 268                         td_verror(td, errno, "fstat");
 269                         return 1;
 270                 }
 271
 272                 f->real_file_size = st.st_size;
 273
 274                 if (!f->file_size || f->file_size > f->real_file_size)
 275                         f->file_size = f->real_file_size;
 276         } else
 277                 f->real_file_size = f->file_size;
 278
 279         return 0;
 280 }
 281
 282 static int bdev_size(struct thread_data *td, struct fio_file *f)
 283 {
 284         unsigned long long bytes;
 285         int r;
 286
 287         r = blockdev_size(f->fd, &bytes);
 288         if (r) {
 289                 td_verror(td, r, "blockdev_size");
 290                 return 1;
 291         }
 292
 293         f->real_file_size = bytes;
 294
 295         /*
 296          * no extend possibilities, so limit size to device size if too large
 297          */
 298         if (!f->file_size || f->file_size > f->real_file_size)
 299                 f->file_size = f->real_file_size;
 300
 301         f->file_size -= f->file_offset;
 302         return 0;
 303 }
 304
 305 static int get_file_size(struct thread_data *td, struct fio_file *f)
 306 {
 307         int ret = 0;
 308
 309         if (f->filetype == FIO_TYPE_FILE) {
 310                 if (!(f->flags & FIO_FILE_EXISTS))
 311                         ret = file_size(td, f);
 312         } else if (f->filetype == FIO_TYPE_BD)
 313                 ret = bdev_size(td, f);
 314         else
 315                 f->real_file_size = -1;
 316
 317         if (ret)
 318                 return ret;
 319
 320         if (f->file_offset > f->real_file_size) {
 321                 log_err("%s: offset extends end (%Lu > %Lu)\n", td->o.name, f->file_offset, f->real_file_size);
 322                 return 1;
 323         }
 324
 325         return 0;
 326 }
 327
 328 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
 329 {
 330         int ret = 0;
 331
 332         if (td->o.odirect)
 333                 return 0;
 334
 335         /*
 336          * FIXME: add blockdev flushing too
 337          */
 338         if (f->mmap)
 339                 ret = madvise(f->mmap, f->file_size, MADV_DONTNEED);
 340         else if (f->filetype == FIO_TYPE_FILE)
 341                 ret = fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_DONTNEED);
 342         else if (f->filetype == FIO_TYPE_BD)
 343                 ret = blockdev_invalidate_cache(f->fd);
 344         else if (f->filetype == FIO_TYPE_CHAR)
 345                 ret = 0;
 346
 347         if (ret < 0) {
 348                 td_verror(td, errno, "invalidate_cache");
 349                 return 1;
 350         }
 351
 352         return ret;
 353 }
 354
 355 void generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
 356 {
 357         close(f->fd);
 358         f->fd = -1;
 359 }
 360
 361 int generic_open_file(struct thread_data *td, struct fio_file *f)
 362 {
 363         int flags = 0;
 364
 365         if (td->o.odirect)
 366                 flags |= OS_O_DIRECT;
 367         if (td->o.sync_io)
 368                 flags |= O_SYNC;
 369
 370         if (td_write(td) || td_rw(td)) {
 371                 flags |= O_RDWR;
 372
 373                 if (f->filetype == FIO_TYPE_FILE)
 374                         flags |= O_CREAT;
 375
 376                 f->fd = open(f->file_name, flags, 0600);
 377         } else {
 378                 if (f->filetype == FIO_TYPE_CHAR)
 379                         flags |= O_RDWR;
 380                 else
 381                         flags |= O_RDONLY;
 382
 383                 f->fd = open(f->file_name, flags);
 384         }
 385
 386         if (f->fd == -1) {
 387                 char buf[FIO_VERROR_SIZE];
 388                 int __e = errno;
 389
 390                 snprintf(buf, sizeof(buf) - 1, "open(%s)", f->file_name);
 391
 392                 td_verror(td, __e, buf);
 393                 if (__e == EINVAL && td->o.odirect)
 394                         log_err("fio: destination does not support O_DIRECT\n");
 395                 if (__e == EMFILE)
 396                         log_err("fio: try reducing/setting openfiles (failed at %u of %u)\n", td->nr_open_files, td->o.nr_files);
 397                 return 1;
 398         }
 399
 400         if (get_file_size(td, f))
 401                 goto err;
 402
 403         if (td->o.invalidate_cache && file_invalidate_cache(td, f))
 404                 goto err;
 405
 406         if (!td_random(td)) {
 407                 if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_SEQUENTIAL) < 0) {
 408                         td_verror(td, errno, "fadvise");
 409                         goto err;
 410                 }
 411         } else {
 412                 if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_RANDOM) < 0) {
 413                         td_verror(td, errno, "fadvise");
 414                         goto err;
 415                 }
 416         }
 417
 418         return 0;
 419 err:
 420         close(f->fd);
 421         return 1;
 422 }
 423
 424 int open_files(struct thread_data *td)
 425 {
 426         struct fio_file *f;
 427         unsigned int i;
 428         int err = 0;
 429
 430         for_each_file(td, f, i) {
 431                 err = td_io_open_file(td, f);
 432                 if (err)
 433                         break;
 434
 435                 if (td->o.open_files == td->nr_open_files)
 436                         break;
 437         }
 438
 439         if (!err)
 440                 return 0;
 441
 442         for_each_file(td, f, i)
 443                 td_io_close_file(td, f);
 444
 445         return err;
 446 }
 447
 448 int setup_files(struct thread_data *td)
 449 {
 450         struct fio_file *f;
 451         unsigned int i;
 452         int err;
 453
 454         /*
 455          * if ioengine defines a setup() method, it's responsible for
 456          * setting up everything in the td->files[] area.
 457          */
 458         if (td->io_ops->setup)
 459                 return td->io_ops->setup(td);
 460
 461         if (create_files(td))
 462                 return 1;
 463
 464         err = open_files(td);
 465         if (err)
 466                 return err;
 467
 468         /*
 469          * Recalculate the total file size now that files are set up.
 470          */
 471         td->o.size = 0;
 472         for_each_file(td, f, i)
 473                 td->o.size += f->file_size;
 474
 475         td->io_size = td->o.size;
 476         if (td->io_size == 0) {
 477                 log_err("%s: no io blocks\n", td->o.name);
 478                 td_verror(td, EINVAL, "total_file_size");
 479                 return 1;
 480         }
 481
 482         if (!td->o.zone_size)
 483                 td->o.zone_size = td->io_size;
 484
 485         td->total_io_size = td->io_size * td->o.loops;
 486
 487         for_each_file(td, f, i)
 488                 td_io_close_file(td, f);
 489
 490         return err;
 491 }
 492
 493 int init_random_map(struct thread_data *td)
 494 {
 495         int num_maps, blocks;
 496         struct fio_file *f;
 497         unsigned int i;
 498
 499         if (td->o.norandommap)
 500                 return 0;
 501
 502         for_each_file(td, f, i) {
 503                 blocks = (f->real_file_size + td->o.rw_min_bs - 1) / td->o.rw_min_bs;
 504                 num_maps = (blocks + BLOCKS_PER_MAP-1)/ BLOCKS_PER_MAP;
 505                 f->file_map = malloc(num_maps * sizeof(long));
 506                 if (!f->file_map) {
 507                         log_err("fio: failed allocating random map. If running a large number of jobs, try the 'norandommap' option\n");
 508                         return 1;
 509                 }
 510                 f->num_maps = num_maps;
 511                 memset(f->file_map, 0, num_maps * sizeof(long));
 512         }
 513
 514         return 0;
 515 }
 516
 517 void close_files(struct thread_data *td)
 518 {
 519         struct fio_file *f;
 520         unsigned int i;
 521
 522         for_each_file(td, f, i) {
 523                 if (!f->file_name && (f->flags & FIO_FILE_UNLINK) &&
 524                     f->filetype == FIO_TYPE_FILE) {
 525                         unlink(f->file_name);
 526                         free(f->file_name);
 527                         f->file_name = NULL;
 528                 }
 529
 530                 td_io_close_file(td, f);
 531
 532                 if (f->file_map) {
 533                         free(f->file_map);
 534                         f->file_map = NULL;
 535                 }
 536         }
 537
 538         td->o.filename = NULL;
 539         td->files = NULL;
 540         td->o.nr_files = 0;
 541 }
 542
 543 static void get_file_type(struct fio_file *f)
 544 {
 545         struct stat sb;
 546
 547         f->filetype = FIO_TYPE_FILE;
 548
 549         if (!lstat(f->file_name, &sb)) {
 550                 f->flags |= FIO_FILE_EXISTS;
 551
 552                 if (S_ISBLK(sb.st_mode))
 553                         f->filetype = FIO_TYPE_BD;
 554                 else if (S_ISCHR(sb.st_mode))
 555                         f->filetype = FIO_TYPE_CHAR;
 556                 else {
 557                         /*
 558                          * might as well do this here, and save a stat later on
 559                          */
 560                         f->real_file_size = sb.st_size;
 561                         f->file_size = f->real_file_size;
 562                 }
 563         }
 564 }
 565
 566 void add_file(struct thread_data *td, const char *fname)
 567 {
 568         int cur_files = td->files_index;
 569         struct fio_file *f;
 570
 571         td->files = realloc(td->files, (cur_files + 1) * sizeof(*f));
 572
 573         f = &td->files[cur_files];
 574         memset(f, 0, sizeof(*f));
 575         f->fd = -1;
 576         f->file_name = strdup(fname);
 577
 578         get_file_type(f);
 579
 580         td->files_index++;
 581         if (f->filetype == FIO_TYPE_FILE)
 582                 td->nr_normal_files++;
 583 }
 584
 585 void get_file(struct fio_file *f)
 586 {
 587         f->references++;
 588 }
 589
 590 void put_file(struct thread_data *td, struct fio_file *f)
 591 {
 592         if (!(f->flags & FIO_FILE_OPEN))
 593                 return;
 594
 595         assert(f->references);
 596         if (--f->references)
 597                 return;
 598
 599         if (should_fsync(td) && td->o.fsync_on_close)
 600                 fsync(f->fd);
 601
 602         if (td->io_ops->close_file)
 603                 td->io_ops->close_file(td, f);
 604         td->nr_open_files--;
 605         f->flags &= ~FIO_FILE_OPEN;
 606 }
 607
 608 static int recurse_dir(struct thread_data *td, const char *dirname)
 609 {
 610         struct dirent *dir;
 611         int ret = 0;
 612         DIR *D;
 613
 614         D = opendir(dirname);
 615         if (!D) {
 616                 td_verror(td, errno, "opendir");
 617                 return 1;
 618         }
 619
 620         while ((dir = readdir(D)) != NULL) {
 621                 char full_path[PATH_MAX];
 622                 struct stat sb;
 623
 624                 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
 625                         continue;
 626
 627                 sprintf(full_path, "%s/%s", dirname, dir->d_name);
 628
 629                 if (lstat(full_path, &sb) == -1) {
 630                         if (errno != ENOENT) {
 631                                 td_verror(td, errno, "stat");
 632                                 return 1;
 633                         }
 634                 }
 635
 636                 if (S_ISREG(sb.st_mode)) {
 637                         add_file(td, full_path);
 638                         td->o.nr_files++;
 639                         continue;
 640                 }
 641
 642                 if ((ret = recurse_dir(td, full_path)) != 0)
 643                         break;
 644         }
 645
 646         closedir(D);
 647         return ret;
 648 }
 649
 650 int add_dir_files(struct thread_data *td, const char *path)
 651 {
 652         return recurse_dir(td, path);
 653 }