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
 161                 if (f->flags & FIO_FILE_EXISTS) {
 162                         s = f->file_size;
 163                         if (s > total_file_size)
 164                                 s = total_file_size;
 165
 166                         total_file_size -= s;
 167                 } else
 168                         new_files++;
 169         }
 170
 171         /*
 172          * unless specifically asked for overwrite, let normal io extend it
 173          */
 174         can_extend = !td->o.overwrite && !(td->io_ops->flags & FIO_NOEXTEND);
 175         if (can_extend) {
 176                 for_each_file(td, f, i) {
 177                         if (fill_file_size(td, f, &total_file_size, new_files)) {
 178                                 log_info("fio: limited to %d files\n", i);
 179                                 td->o.nr_files = i;
 180                                 break;
 181                         }
 182                 }
 183
 184                 return 0;
 185         }
 186
 187         local_file_size = total_file_size;
 188         if (!local_file_size)
 189                 local_file_size = -1;
 190
 191         total_file_size = 0;
 192         need_create = 0;
 193         create_size = 0;
 194         for_each_file(td, f, i) {
 195                 int file_there;
 196
 197                 if (f->filetype != FIO_TYPE_FILE)
 198                         continue;
 199                 if (f->flags & FIO_FILE_EXISTS) {
 200                         total_file_size += f->file_size;
 201                         continue;
 202                 }
 203
 204                 if (fill_file_size(td, f, &local_file_size, new_files)) {
 205                         log_info("fio: limited to %d files\n", i);
 206                         new_files -= (td->o.nr_files - i);
 207                         td->o.nr_files = i;
 208                         break;
 209                 }
 210
 211                 total_file_size += f->file_size;
 212                 create_size += f->file_size;
 213                 file_there = !file_ok(td, f);
 214
 215                 if (file_there && td_write(td) && !td->o.overwrite) {
 216                         unlink(f->file_name);
 217                         file_there = 0;
 218                 }
 219
 220                 need_create += !file_there;
 221         }
 222
 223         if (!need_create)
 224                 return 0;
 225
 226         if (!td->o.size && !total_file_size) {
 227                 log_err("Need size for create\n");
 228                 td_verror(td, EINVAL, "file_size");
 229                 return 1;
 230         }
 231
 232         temp_stall_ts = 1;
 233         log_info("%s: Laying out IO file(s) (%u files / %LuMiB)\n",
 234                                 td->o.name, new_files, create_size >> 20);
 235
 236         err = 0;
 237         for_each_file(td, f, i) {
 238                 /*
 239                  * Only unlink files that we created.
 240                  */
 241                 f->flags &= ~FIO_FILE_UNLINK;
 242                 if (file_ok(td, f)) {
 243                         if (td->o.unlink)
 244                                 f->flags |= FIO_FILE_UNLINK;
 245
 246                         err = create_file(td, f);
 247                         if (err)
 248                                 break;
 249                 }
 250         }
 251
 252         temp_stall_ts = 0;
 253         return err;
 254 }
 255
 256 static int file_size(struct thread_data *td, struct fio_file *f)
 257 {
 258         struct stat st;
 259
 260         if (td->o.overwrite) {
 261                 if (fstat(f->fd, &st) == -1) {
 262                         td_verror(td, errno, "fstat");
 263                         return 1;
 264                 }
 265
 266                 f->real_file_size = st.st_size;
 267
 268                 if (!f->file_size || f->file_size > f->real_file_size)
 269                         f->file_size = f->real_file_size;
 270         } else
 271                 f->real_file_size = f->file_size;
 272
 273         return 0;
 274 }
 275
 276 static int bdev_size(struct thread_data *td, struct fio_file *f)
 277 {
 278         unsigned long long bytes;
 279         int r;
 280
 281         r = blockdev_size(f->fd, &bytes);
 282         if (r) {
 283                 td_verror(td, r, "blockdev_size");
 284                 return 1;
 285         }
 286
 287         f->real_file_size = bytes;
 288
 289         /*
 290          * no extend possibilities, so limit size to device size if too large
 291          */
 292         if (!f->file_size || f->file_size > f->real_file_size)
 293                 f->file_size = f->real_file_size;
 294
 295         f->file_size -= f->file_offset;
 296         return 0;
 297 }
 298
 299 static int get_file_size(struct thread_data *td, struct fio_file *f)
 300 {
 301         int ret = 0;
 302
 303         if (f->filetype == FIO_TYPE_FILE) {
 304                 if (!(f->flags & FIO_FILE_EXISTS))
 305                         ret = file_size(td, f);
 306         } else if (f->filetype == FIO_TYPE_BD)
 307                 ret = bdev_size(td, f);
 308         else
 309                 f->real_file_size = -1;
 310
 311         if (ret)
 312                 return ret;
 313
 314         if (f->file_offset > f->real_file_size) {
 315                 log_err("%s: offset extends end (%Lu > %Lu)\n", td->o.name, f->file_offset, f->real_file_size);
 316                 return 1;
 317         }
 318
 319         return 0;
 320 }
 321
 322 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
 323 {
 324         int ret = 0;
 325
 326         if (td->o.odirect)
 327                 return 0;
 328
 329         /*
 330          * FIXME: add blockdev flushing too
 331          */
 332         if (f->mmap)
 333                 ret = madvise(f->mmap, f->file_size, MADV_DONTNEED);
 334         else if (f->filetype == FIO_TYPE_FILE)
 335                 ret = fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_DONTNEED);
 336         else if (f->filetype == FIO_TYPE_BD)
 337                 ret = blockdev_invalidate_cache(f->fd);
 338         else if (f->filetype == FIO_TYPE_CHAR)
 339                 ret = 0;
 340
 341         if (ret < 0) {
 342                 td_verror(td, errno, "invalidate_cache");
 343                 return 1;
 344         }
 345
 346         return ret;
 347 }
 348
 349 void generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
 350 {
 351         close(f->fd);
 352         f->fd = -1;
 353 }
 354
 355 int generic_open_file(struct thread_data *td, struct fio_file *f)
 356 {
 357         int flags = 0;
 358
 359         if (td->o.odirect)
 360                 flags |= OS_O_DIRECT;
 361         if (td->o.sync_io)
 362                 flags |= O_SYNC;
 363
 364         if (td_write(td) || td_rw(td)) {
 365                 flags |= O_RDWR;
 366
 367                 if (f->filetype == FIO_TYPE_FILE)
 368                         flags |= O_CREAT;
 369
 370                 f->fd = open(f->file_name, flags, 0600);
 371         } else {
 372                 if (f->filetype == FIO_TYPE_CHAR)
 373                         flags |= O_RDWR;
 374                 else
 375                         flags |= O_RDONLY;
 376
 377                 f->fd = open(f->file_name, flags);
 378         }
 379
 380         if (f->fd == -1) {
 381                 int __e = errno;
 382
 383                 td_verror(td, __e, "open");
 384                 if (__e == EINVAL && td->o.odirect)
 385                         log_err("fio: destination does not support O_DIRECT\n");
 386                 if (__e == EMFILE)
 387                         log_err("fio: try reducing/setting openfiles (failed at %u of %u)\n", td->nr_open_files, td->o.nr_files);
 388                 return 1;
 389         }
 390
 391         if (get_file_size(td, f))
 392                 goto err;
 393
 394         if (td->o.invalidate_cache && file_invalidate_cache(td, f))
 395                 goto err;
 396
 397         if (!td_random(td)) {
 398                 if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_SEQUENTIAL) < 0) {
 399                         td_verror(td, errno, "fadvise");
 400                         goto err;
 401                 }
 402         } else {
 403                 if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_RANDOM) < 0) {
 404                         td_verror(td, errno, "fadvise");
 405                         goto err;
 406                 }
 407         }
 408
 409         return 0;
 410 err:
 411         close(f->fd);
 412         return 1;
 413 }
 414
 415 int open_files(struct thread_data *td)
 416 {
 417         struct fio_file *f;
 418         unsigned int i;
 419         int err = 0;
 420
 421         for_each_file(td, f, i) {
 422                 err = td_io_open_file(td, f);
 423                 if (err)
 424                         break;
 425
 426                 if (td->o.open_files == td->nr_open_files)
 427                         break;
 428         }
 429
 430         if (!err)
 431                 return 0;
 432
 433         for_each_file(td, f, i)
 434                 td_io_close_file(td, f);
 435
 436         return err;
 437 }
 438
 439 int setup_files(struct thread_data *td)
 440 {
 441         struct fio_file *f;
 442         unsigned int i;
 443         int err;
 444
 445         /*
 446          * if ioengine defines a setup() method, it's responsible for
 447          * setting up everything in the td->files[] area.
 448          */
 449         if (td->io_ops->setup)
 450                 return td->io_ops->setup(td);
 451
 452         if (create_files(td))
 453                 return 1;
 454
 455         err = open_files(td);
 456         if (err)
 457                 return err;
 458
 459         /*
 460          * Recalculate the total file size now that files are set up.
 461          */
 462         td->o.size = 0;
 463         for_each_file(td, f, i)
 464                 td->o.size += f->file_size;
 465
 466         td->io_size = td->o.size;
 467         if (td->io_size == 0) {
 468                 log_err("%s: no io blocks\n", td->o.name);
 469                 td_verror(td, EINVAL, "total_file_size");
 470                 return 1;
 471         }
 472
 473         if (!td->o.zone_size)
 474                 td->o.zone_size = td->io_size;
 475
 476         td->total_io_size = td->io_size * td->o.loops;
 477
 478         for_each_file(td, f, i)
 479                 td_io_close_file(td, f);
 480
 481         return err;
 482 }
 483
 484 int init_random_map(struct thread_data *td)
 485 {
 486         int num_maps, blocks;
 487         struct fio_file *f;
 488         unsigned int i;
 489
 490         if (td->o.norandommap)
 491                 return 0;
 492
 493         for_each_file(td, f, i) {
 494                 blocks = (f->real_file_size + td->o.rw_min_bs - 1) / td->o.rw_min_bs;
 495                 num_maps = (blocks + BLOCKS_PER_MAP-1)/ BLOCKS_PER_MAP;
 496                 f->file_map = malloc(num_maps * sizeof(long));
 497                 if (!f->file_map) {
 498                         log_err("fio: failed allocating random map. If running a large number of jobs, try the 'norandommap' option\n");
 499                         return 1;
 500                 }
 501                 f->num_maps = num_maps;
 502                 memset(f->file_map, 0, num_maps * sizeof(long));
 503         }
 504
 505         return 0;
 506 }
 507
 508 void close_files(struct thread_data *td)
 509 {
 510         struct fio_file *f;
 511         unsigned int i;
 512
 513         for_each_file(td, f, i) {
 514                 if (!f->file_name && (f->flags & FIO_FILE_UNLINK) &&
 515                     f->filetype == FIO_TYPE_FILE) {
 516                         unlink(f->file_name);
 517                         free(f->file_name);
 518                         f->file_name = NULL;
 519                 }
 520
 521                 td_io_close_file(td, f);
 522
 523                 if (f->file_map)
 524                         free(f->file_map);
 525         }
 526
 527         td->o.filename = NULL;
 528         td->files = NULL;
 529         td->o.nr_files = 0;
 530 }
 531
 532 static void get_file_type(struct fio_file *f)
 533 {
 534         struct stat sb;
 535
 536         f->filetype = FIO_TYPE_FILE;
 537
 538         if (!lstat(f->file_name, &sb)) {
 539                 f->flags |= FIO_FILE_EXISTS;
 540
 541                 if (S_ISBLK(sb.st_mode))
 542                         f->filetype = FIO_TYPE_BD;
 543                 else if (S_ISCHR(sb.st_mode))
 544                         f->filetype = FIO_TYPE_CHAR;
 545                 else {
 546                         /*
 547                          * might as well do this here, and save a stat later on
 548                          */
 549                         f->real_file_size = sb.st_size;
 550                         f->file_size = f->real_file_size;
 551                 }
 552         }
 553 }
 554
 555 void add_file(struct thread_data *td, const char *fname)
 556 {
 557         int cur_files = td->files_index;
 558         struct fio_file *f;
 559
 560         td->files = realloc(td->files, (cur_files + 1) * sizeof(*f));
 561
 562         f = &td->files[cur_files];
 563         memset(f, 0, sizeof(*f));
 564         f->fd = -1;
 565         f->file_name = strdup(fname);
 566
 567         get_file_type(f);
 568
 569         td->files_index++;
 570         if (f->filetype == FIO_TYPE_FILE)
 571                 td->nr_normal_files++;
 572 }
 573
 574 void get_file(struct fio_file *f)
 575 {
 576         f->references++;
 577 }
 578
 579 void put_file(struct thread_data *td, struct fio_file *f)
 580 {
 581         if (!(f->flags & FIO_FILE_OPEN))
 582                 return;
 583
 584         assert(f->references);
 585         if (--f->references)
 586                 return;
 587
 588         if (should_fsync(td) && td->o.fsync_on_close)
 589                 fsync(f->fd);
 590
 591         if (td->io_ops->close_file)
 592                 td->io_ops->close_file(td, f);
 593         td->nr_open_files--;
 594         f->flags &= ~FIO_FILE_OPEN;
 595 }
 596
 597 static int recurse_dir(struct thread_data *td, const char *dirname)
 598 {
 599         struct dirent *dir;
 600         int ret = 0;
 601         DIR *D;
 602
 603         D = opendir(dirname);
 604         if (!D) {
 605                 td_verror(td, errno, "opendir");
 606                 return 1;
 607         }
 608
 609         while ((dir = readdir(D)) != NULL) {
 610                 char full_path[PATH_MAX];
 611                 struct stat sb;
 612
 613                 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
 614                         continue;
 615
 616                 sprintf(full_path, "%s/%s", dirname, dir->d_name);
 617
 618                 if (lstat(full_path, &sb) == -1) {
 619                         if (errno != ENOENT) {
 620                                 td_verror(td, errno, "stat");
 621                                 return 1;
 622                         }
 623                 }
 624
 625                 if (S_ISREG(sb.st_mode)) {
 626                         add_file(td, full_path);
 627                         td->o.nr_files++;
 628                         continue;
 629                 }
 630
 631                 if ((ret = recurse_dir(td, full_path)) != 0)
 632                         break;
 633         }
 634
 635         closedir(D);
 636         return ret;
 637 }
 638
 639 int add_dir_files(struct thread_data *td, const char *path)
 640 {
 641         return recurse_dir(td, path);
 642 }