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) {
 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                 int __e = errno;
 388
 389                 td_verror(td, __e, "open");
 390                 if (__e == EINVAL && td->o.odirect)
 391                         log_err("fio: destination does not support O_DIRECT\n");
 392                 if (__e == EMFILE)
 393                         log_err("fio: try reducing/setting openfiles (failed at %u of %u)\n", td->nr_open_files, td->o.nr_files);
 394                 return 1;
 395         }
 396
 397         if (get_file_size(td, f))
 398                 goto err;
 399
 400         if (td->o.invalidate_cache && file_invalidate_cache(td, f))
 401                 goto err;
 402
 403         if (!td_random(td)) {
 404                 if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_SEQUENTIAL) < 0) {
 405                         td_verror(td, errno, "fadvise");
 406                         goto err;
 407                 }
 408         } else {
 409                 if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_RANDOM) < 0) {
 410                         td_verror(td, errno, "fadvise");
 411                         goto err;
 412                 }
 413         }
 414
 415         return 0;
 416 err:
 417         close(f->fd);
 418         return 1;
 419 }
 420
 421 int open_files(struct thread_data *td)
 422 {
 423         struct fio_file *f;
 424         unsigned int i;
 425         int err = 0;
 426
 427         for_each_file(td, f, i) {
 428                 err = td_io_open_file(td, f);
 429                 if (err)
 430                         break;
 431
 432                 if (td->o.open_files == td->nr_open_files)
 433                         break;
 434         }
 435
 436         if (!err)
 437                 return 0;
 438
 439         for_each_file(td, f, i)
 440                 td_io_close_file(td, f);
 441
 442         return err;
 443 }
 444
 445 int setup_files(struct thread_data *td)
 446 {
 447         struct fio_file *f;
 448         unsigned int i;
 449         int err;
 450
 451         /*
 452          * if ioengine defines a setup() method, it's responsible for
 453          * setting up everything in the td->files[] area.
 454          */
 455         if (td->io_ops->setup)
 456                 return td->io_ops->setup(td);
 457
 458         if (create_files(td))
 459                 return 1;
 460
 461         err = open_files(td);
 462         if (err)
 463                 return err;
 464
 465         /*
 466          * Recalculate the total file size now that files are set up.
 467          */
 468         td->o.size = 0;
 469         for_each_file(td, f, i)
 470                 td->o.size += f->file_size;
 471
 472         td->io_size = td->o.size;
 473         if (td->io_size == 0) {
 474                 log_err("%s: no io blocks\n", td->o.name);
 475                 td_verror(td, EINVAL, "total_file_size");
 476                 return 1;
 477         }
 478
 479         if (!td->o.zone_size)
 480                 td->o.zone_size = td->io_size;
 481
 482         td->total_io_size = td->io_size * td->o.loops;
 483
 484         for_each_file(td, f, i)
 485                 td_io_close_file(td, f);
 486
 487         return err;
 488 }
 489
 490 int init_random_map(struct thread_data *td)
 491 {
 492         int num_maps, blocks;
 493         struct fio_file *f;
 494         unsigned int i;
 495
 496         if (td->o.norandommap)
 497                 return 0;
 498
 499         for_each_file(td, f, i) {
 500                 blocks = (f->real_file_size + td->o.rw_min_bs - 1) / td->o.rw_min_bs;
 501                 num_maps = (blocks + BLOCKS_PER_MAP-1)/ BLOCKS_PER_MAP;
 502                 f->file_map = malloc(num_maps * sizeof(long));
 503                 if (!f->file_map) {
 504                         log_err("fio: failed allocating random map. If running a large number of jobs, try the 'norandommap' option\n");
 505                         return 1;
 506                 }
 507                 f->num_maps = num_maps;
 508                 memset(f->file_map, 0, num_maps * sizeof(long));
 509         }
 510
 511         return 0;
 512 }
 513
 514 void close_files(struct thread_data *td)
 515 {
 516         struct fio_file *f;
 517         unsigned int i;
 518
 519         for_each_file(td, f, i) {
 520                 if (!f->file_name && (f->flags & FIO_FILE_UNLINK) &&
 521                     f->filetype == FIO_TYPE_FILE) {
 522                         unlink(f->file_name);
 523                         free(f->file_name);
 524                         f->file_name = NULL;
 525                 }
 526
 527                 td_io_close_file(td, f);
 528
 529                 if (f->file_map)
 530                         free(f->file_map);
 531         }
 532
 533         td->o.filename = NULL;
 534         td->files = NULL;
 535         td->o.nr_files = 0;
 536 }
 537
 538 static void get_file_type(struct fio_file *f)
 539 {
 540         struct stat sb;
 541
 542         f->filetype = FIO_TYPE_FILE;
 543
 544         if (!lstat(f->file_name, &sb)) {
 545                 f->flags |= FIO_FILE_EXISTS;
 546
 547                 if (S_ISBLK(sb.st_mode))
 548                         f->filetype = FIO_TYPE_BD;
 549                 else if (S_ISCHR(sb.st_mode))
 550                         f->filetype = FIO_TYPE_CHAR;
 551                 else {
 552                         /*
 553                          * might as well do this here, and save a stat later on
 554                          */
 555                         f->real_file_size = sb.st_size;
 556                         f->file_size = f->real_file_size;
 557                 }
 558         }
 559 }
 560
 561 void add_file(struct thread_data *td, const char *fname)
 562 {
 563         int cur_files = td->files_index;
 564         struct fio_file *f;
 565
 566         td->files = realloc(td->files, (cur_files + 1) * sizeof(*f));
 567
 568         f = &td->files[cur_files];
 569         memset(f, 0, sizeof(*f));
 570         f->fd = -1;
 571         f->file_name = strdup(fname);
 572
 573         get_file_type(f);
 574
 575         td->files_index++;
 576         if (f->filetype == FIO_TYPE_FILE)
 577                 td->nr_normal_files++;
 578 }
 579
 580 void get_file(struct fio_file *f)
 581 {
 582         f->references++;
 583 }
 584
 585 void put_file(struct thread_data *td, struct fio_file *f)
 586 {
 587         if (!(f->flags & FIO_FILE_OPEN))
 588                 return;
 589
 590         assert(f->references);
 591         if (--f->references)
 592                 return;
 593
 594         if (should_fsync(td) && td->o.fsync_on_close)
 595                 fsync(f->fd);
 596
 597         if (td->io_ops->close_file)
 598                 td->io_ops->close_file(td, f);
 599         td->nr_open_files--;
 600         f->flags &= ~FIO_FILE_OPEN;
 601 }
 602
 603 static int recurse_dir(struct thread_data *td, const char *dirname)
 604 {
 605         struct dirent *dir;
 606         int ret = 0;
 607         DIR *D;
 608
 609         D = opendir(dirname);
 610         if (!D) {
 611                 td_verror(td, errno, "opendir");
 612                 return 1;
 613         }
 614
 615         while ((dir = readdir(D)) != NULL) {
 616                 char full_path[PATH_MAX];
 617                 struct stat sb;
 618
 619                 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
 620                         continue;
 621
 622                 sprintf(full_path, "%s/%s", dirname, dir->d_name);
 623
 624                 if (lstat(full_path, &sb) == -1) {
 625                         if (errno != ENOENT) {
 626                                 td_verror(td, errno, "stat");
 627                                 return 1;
 628                         }
 629                 }
 630
 631                 if (S_ISREG(sb.st_mode)) {
 632                         add_file(td, full_path);
 633                         td->o.nr_files++;
 634                         continue;
 635                 }
 636
 637                 if ((ret = recurse_dir(td, full_path)) != 0)
 638                         break;
 639         }
 640
 641         closedir(D);
 642         return ret;
 643 }
 644
 645 int add_dir_files(struct thread_data *td, const char *path)
 646 {
 647         return recurse_dir(td, path);
 648 }