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->max_bs[DDIR_WRITE]);
  62         memset(b, 0, td->max_bs[DDIR_WRITE]);
  63
  64         left = f->file_size;
  65         while (left && !td->terminate) {
  66                 bs = td->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->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->file_size_high)
 108                 upper = td->file_size_high;
 109         else if (upper < td->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->file_size_low + (unsigned long long) ((double) upper * (r / (RAND_MAX + 1.0)));
 116         ret -= (ret % td->rw_min_bs);
 117         if (ret > upper)
 118                 ret = upper;
 119         return ret;
 120 }
 121
 122 static int create_files(struct thread_data *td)
 123 {
 124         struct fio_file *f;
 125         int err, need_create, can_extend;
 126         unsigned long long total_file_size, local_file_size;
 127         unsigned int i, new_files;
 128
 129         new_files = 0;
 130         total_file_size = td->total_file_size;
 131         for_each_file(td, f, i) {
 132                 unsigned long long s;
 133
 134                 f->file_offset = td->start_offset;
 135
 136                 if (f->filetype != FIO_TYPE_FILE)
 137                         continue;
 138
 139                 if (f->flags & FIO_FILE_EXISTS) {
 140                         s = f->file_size;
 141                         if (s > total_file_size)
 142                                 s = total_file_size;
 143
 144                         total_file_size -= s;
 145                 } else
 146                         new_files++;
 147         }
 148
 149         /*
 150          * unless specifically asked for overwrite, let normal io extend it
 151          */
 152         can_extend = !td->overwrite && !(td->io_ops->flags & FIO_NOEXTEND);
 153         if (can_extend)
 154                 return 0;
 155
 156         need_create = 0;
 157         local_file_size = total_file_size;
 158         if (!local_file_size)
 159                 local_file_size = -1;
 160
 161         for_each_file(td, f, i) {
 162                 int file_there;
 163
 164                 if (f->filetype != FIO_TYPE_FILE)
 165                         continue;
 166                 if (f->flags & FIO_FILE_EXISTS)
 167                         continue;
 168
 169                 if (!td->file_size_low)
 170                         f->file_size = total_file_size / new_files;
 171                 else {
 172                         /*
 173                          * If we don't have enough space left for a file
 174                          * of the minimum size, bail.
 175                          */
 176                         if (local_file_size < td->file_size_low) {
 177                                 log_info("fio: limited to %d files\n", i);
 178                                 new_files -= (td->nr_files - i);
 179                                 td->nr_files = i;
 180                                 break;
 181                         }
 182
 183                         f->file_size = set_rand_file_size(td, local_file_size);
 184                         local_file_size -= f->file_size;
 185                 }
 186
 187                 file_there = !file_ok(td, f);
 188
 189                 if (file_there && td_write(td) && !td->overwrite) {
 190                         unlink(f->file_name);
 191                         file_there = 0;
 192                 }
 193
 194                 need_create += !file_there;
 195         }
 196
 197         if (!need_create)
 198                 return 0;
 199
 200         if (!td->total_file_size) {
 201                 log_err("Need size for create\n");
 202                 td_verror(td, EINVAL, "file_size");
 203                 return 1;
 204         }
 205
 206         temp_stall_ts = 1;
 207         fprintf(f_out, "%s: Laying out IO file(s) (%u files / %LuMiB)\n",
 208                                 td->name, new_files,
 209                                 total_file_size >> 20);
 210
 211         err = 0;
 212         for_each_file(td, f, i) {
 213                 /*
 214                  * Only unlink files that we created.
 215                  */
 216                 f->flags &= ~FIO_FILE_UNLINK;
 217                 if (file_ok(td, f)) {
 218                         if (td->unlink)
 219                                 f->flags |= FIO_FILE_UNLINK;
 220
 221                         err = create_file(td, f);
 222                         if (err)
 223                                 break;
 224                 }
 225         }
 226
 227         temp_stall_ts = 0;
 228         return err;
 229 }
 230
 231 static int file_size(struct thread_data *td, struct fio_file *f)
 232 {
 233         struct stat st;
 234
 235         if (td->overwrite) {
 236                 if (fstat(f->fd, &st) == -1) {
 237                         td_verror(td, errno, "fstat");
 238                         return 1;
 239                 }
 240
 241                 f->real_file_size = st.st_size;
 242
 243                 if (!f->file_size || f->file_size > f->real_file_size)
 244                         f->file_size = f->real_file_size;
 245         } else
 246                 f->real_file_size = f->file_size;
 247
 248         return 0;
 249 }
 250
 251 static int bdev_size(struct thread_data *td, struct fio_file *f)
 252 {
 253         unsigned long long bytes;
 254         int r;
 255
 256         r = blockdev_size(f->fd, &bytes);
 257         if (r) {
 258                 td_verror(td, r, "blockdev_size");
 259                 return 1;
 260         }
 261
 262         f->real_file_size = bytes;
 263
 264         /*
 265          * no extend possibilities, so limit size to device size if too large
 266          */
 267         if (!f->file_size || f->file_size > f->real_file_size)
 268                 f->file_size = f->real_file_size;
 269
 270         f->file_size -= f->file_offset;
 271         return 0;
 272 }
 273
 274 static int get_file_size(struct thread_data *td, struct fio_file *f)
 275 {
 276         int ret = 0;
 277
 278         if (f->filetype == FIO_TYPE_FILE) {
 279                 if (!(f->flags & FIO_FILE_EXISTS))
 280                         ret = file_size(td, f);
 281         } else if (f->filetype == FIO_TYPE_BD)
 282                 ret = bdev_size(td, f);
 283         else
 284                 f->real_file_size = -1;
 285
 286         if (ret)
 287                 return ret;
 288
 289         if (f->file_offset > f->real_file_size) {
 290                 log_err("%s: offset extends end (%Lu > %Lu)\n", td->name, f->file_offset, f->real_file_size);
 291                 return 1;
 292         }
 293
 294         return 0;
 295 }
 296
 297 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
 298 {
 299         int ret = 0;
 300
 301         if (td->odirect)
 302                 return 0;
 303
 304         /*
 305          * FIXME: add blockdev flushing too
 306          */
 307         if (f->mmap)
 308                 ret = madvise(f->mmap, f->file_size, MADV_DONTNEED);
 309         else if (f->filetype == FIO_TYPE_FILE) {
 310                 ret = fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_DONTNEED);
 311         } else if (f->filetype == FIO_TYPE_BD) {
 312                 ret = blockdev_invalidate_cache(f->fd);
 313         } else if (f->filetype == FIO_TYPE_CHAR)
 314                 ret = 0;
 315
 316         if (ret < 0) {
 317                 td_verror(td, errno, "invalidate_cache");
 318                 return 1;
 319         }
 320
 321         return ret;
 322 }
 323
 324 void generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
 325 {
 326         close(f->fd);
 327         f->fd = -1;
 328 }
 329
 330 int generic_open_file(struct thread_data *td, struct fio_file *f)
 331 {
 332         int flags = 0;
 333
 334         if (td->odirect)
 335                 flags |= OS_O_DIRECT;
 336         if (td->sync_io)
 337                 flags |= O_SYNC;
 338
 339         if (td_write(td) || td_rw(td)) {
 340                 flags |= O_RDWR;
 341
 342                 if (f->filetype == FIO_TYPE_FILE)
 343                         flags |= O_CREAT;
 344
 345                 f->fd = open(f->file_name, flags, 0600);
 346         } else {
 347                 if (f->filetype == FIO_TYPE_CHAR)
 348                         flags |= O_RDWR;
 349                 else
 350                         flags |= O_RDONLY;
 351
 352                 f->fd = open(f->file_name, flags);
 353         }
 354
 355         if (f->fd == -1) {
 356                 int __e = errno;
 357
 358                 td_verror(td, __e, "open");
 359                 if (__e == EINVAL && td->odirect)
 360                         log_err("fio: destination does not support O_DIRECT\n");
 361                 if (__e == EMFILE)
 362                         log_err("fio: try reducing/setting openfiles (failed at %u of %u)\n", td->nr_open_files, td->nr_files);
 363                 return 1;
 364         }
 365
 366         if (get_file_size(td, f))
 367                 goto err;
 368
 369         if (td->invalidate_cache && file_invalidate_cache(td, f))
 370                 goto err;
 371
 372         if (!td_random(td)) {
 373                 if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_SEQUENTIAL) < 0) {
 374                         td_verror(td, errno, "fadvise");
 375                         goto err;
 376                 }
 377         } else {
 378                 if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_RANDOM) < 0) {
 379                         td_verror(td, errno, "fadvise");
 380                         goto err;
 381                 }
 382         }
 383
 384         return 0;
 385 err:
 386         close(f->fd);
 387         return 1;
 388 }
 389
 390 int open_files(struct thread_data *td)
 391 {
 392         struct fio_file *f;
 393         unsigned int i;
 394         int err = 0;
 395
 396         for_each_file(td, f, i) {
 397                 err = td_io_open_file(td, f);
 398                 if (err)
 399                         break;
 400
 401                 if (td->open_files == td->nr_open_files)
 402                         break;
 403         }
 404
 405         if (!err)
 406                 return 0;
 407
 408         for_each_file(td, f, i)
 409                 td_io_close_file(td, f);
 410
 411         return err;
 412 }
 413
 414 int setup_files(struct thread_data *td)
 415 {
 416         struct fio_file *f;
 417         unsigned int i;
 418         int err;
 419
 420         /*
 421          * if ioengine defines a setup() method, it's responsible for
 422          * setting up everything in the td->files[] area.
 423          */
 424         if (td->io_ops->setup)
 425                 return td->io_ops->setup(td);
 426
 427         if (create_files(td))
 428                 return 1;
 429
 430         err = open_files(td);
 431         if (err)
 432                 return err;
 433
 434         /*
 435          * Recalculate the total file size now that files are set up.
 436          */
 437         td->total_file_size = 0;
 438         for_each_file(td, f, i)
 439                 td->total_file_size += f->file_size;
 440
 441         td->io_size = td->total_file_size;
 442         if (td->io_size == 0) {
 443                 log_err("%s: no io blocks\n", td->name);
 444                 td_verror(td, EINVAL, "total_file_size");
 445                 return 1;
 446         }
 447
 448         if (!td->zone_size)
 449                 td->zone_size = td->io_size;
 450
 451         td->total_io_size = td->io_size * td->loops;
 452
 453         for_each_file(td, f, i)
 454                 td_io_close_file(td, f);
 455
 456         return err;
 457 }
 458
 459 void close_files(struct thread_data *td)
 460 {
 461         struct fio_file *f;
 462         unsigned int i;
 463
 464         for_each_file(td, f, i) {
 465                 if (!f->file_name && (f->flags & FIO_FILE_UNLINK) &&
 466                     f->filetype == FIO_TYPE_FILE) {
 467                         unlink(f->file_name);
 468                         free(f->file_name);
 469                         f->file_name = NULL;
 470                 }
 471
 472                 td_io_close_file(td, f);
 473
 474                 if (f->file_map)
 475                         free(f->file_map);
 476         }
 477
 478         td->filename = NULL;
 479         td->files = NULL;
 480         td->nr_files = 0;
 481 }
 482
 483 static void get_file_type(struct fio_file *f)
 484 {
 485         struct stat sb;
 486
 487         f->filetype = FIO_TYPE_FILE;
 488
 489         if (!lstat(f->file_name, &sb)) {
 490                 f->flags |= FIO_FILE_EXISTS;
 491
 492                 if (S_ISBLK(sb.st_mode))
 493                         f->filetype = FIO_TYPE_BD;
 494                 else if (S_ISCHR(sb.st_mode))
 495                         f->filetype = FIO_TYPE_CHAR;
 496                 else {
 497                         /*
 498                          * might as well do this here, and save a stat later on
 499                          */
 500                         f->real_file_size = sb.st_size;
 501                         f->file_size = f->real_file_size;
 502                 }
 503         }
 504 }
 505
 506 void add_file(struct thread_data *td, const char *fname)
 507 {
 508         int cur_files = td->files_index;
 509         struct fio_file *f;
 510
 511         td->files = realloc(td->files, (cur_files + 1) * sizeof(*f));
 512
 513         f = &td->files[cur_files];
 514         memset(f, 0, sizeof(*f));
 515         f->fd = -1;
 516         f->file_name = strdup(fname);
 517
 518         get_file_type(f);
 519
 520         td->files_index++;
 521         if (f->filetype == FIO_TYPE_FILE)
 522                 td->nr_normal_files++;
 523 }
 524
 525 void get_file(struct fio_file *f)
 526 {
 527         f->references++;
 528 }
 529
 530 void put_file(struct thread_data *td, struct fio_file *f)
 531 {
 532         if (!(f->flags & FIO_FILE_OPEN))
 533                 return;
 534
 535         assert(f->references);
 536         if (--f->references)
 537                 return;
 538
 539         if (should_fsync(td) && td->fsync_on_close)
 540                 fsync(f->fd);
 541
 542         if (td->io_ops->close_file)
 543                 td->io_ops->close_file(td, f);
 544         td->nr_open_files--;
 545         f->flags &= ~FIO_FILE_OPEN;
 546 }
 547
 548 static int recurse_dir(struct thread_data *td, const char *dirname)
 549 {
 550         struct dirent *dir;
 551         int ret = 0;
 552         DIR *D;
 553
 554         D = opendir(dirname);
 555         if (!D) {
 556                 td_verror(td, errno, "opendir");
 557                 return 1;
 558         }
 559
 560         while ((dir = readdir(D)) != NULL) {
 561                 char full_path[PATH_MAX];
 562                 struct stat sb;
 563
 564                 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
 565                         continue;
 566
 567                 sprintf(full_path, "%s/%s", dirname, dir->d_name);
 568
 569                 if (lstat(full_path, &sb) == -1) {
 570                         if (errno != ENOENT) {
 571                                 td_verror(td, errno, "stat");
 572                                 return 1;
 573                         }
 574                 }
 575
 576                 if (S_ISREG(sb.st_mode)) {
 577                         add_file(td, full_path);
 578                         td->nr_files++;
 579                         continue;
 580                 }
 581
 582                 if ((ret = recurse_dir(td, full_path)) != 0)
 583                         break;
 584         }
 585
 586         closedir(D);
 587         return ret;
 588 }
 589
 590 int add_dir_files(struct thread_data *td, const char *path)
 591 {
 592         return recurse_dir(td, path);
 593 }