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         local_file_size = total_file_size;
 157         if (!local_file_size)
 158                 local_file_size = -1;
 159
 160         total_file_size = 0;
 161         need_create = 0;
 162         for_each_file(td, f, i) {
 163                 int file_there;
 164
 165                 if (f->filetype != FIO_TYPE_FILE)
 166                         continue;
 167                 if (f->flags & FIO_FILE_EXISTS) {
 168                         total_file_size += f->file_size;
 169                         continue;
 170                 }
 171
 172                 if (!td->file_size_low)
 173                         f->file_size = total_file_size / new_files;
 174                 else {
 175                         /*
 176                          * If we don't have enough space left for a file
 177                          * of the minimum size, bail.
 178                          */
 179                         if (local_file_size < td->file_size_low) {
 180                                 log_info("fio: limited to %d files\n", i);
 181                                 new_files -= (td->nr_files - i);
 182                                 td->nr_files = i;
 183                                 break;
 184                         }
 185
 186                         f->file_size = set_rand_file_size(td, local_file_size);
 187                         local_file_size -= f->file_size;
 188                 }
 189
 190                 total_file_size += f->file_size;
 191                 file_there = !file_ok(td, f);
 192
 193                 if (file_there && td_write(td) && !td->overwrite) {
 194                         unlink(f->file_name);
 195                         file_there = 0;
 196                 }
 197
 198                 need_create += !file_there;
 199         }
 200
 201         if (!need_create)
 202                 return 0;
 203
 204         if (!td->total_file_size) {
 205                 log_err("Need size for create\n");
 206                 td_verror(td, EINVAL, "file_size");
 207                 return 1;
 208         }
 209
 210         temp_stall_ts = 1;
 211         log_info("%s: Laying out IO file(s) (%u files / %LuMiB)\n",
 212                                 td->name, new_files, total_file_size >> 20);
 213
 214         err = 0;
 215         for_each_file(td, f, i) {
 216                 /*
 217                  * Only unlink files that we created.
 218                  */
 219                 f->flags &= ~FIO_FILE_UNLINK;
 220                 if (file_ok(td, f)) {
 221                         if (td->unlink)
 222                                 f->flags |= FIO_FILE_UNLINK;
 223
 224                         err = create_file(td, f);
 225                         if (err)
 226                                 break;
 227                 }
 228         }
 229
 230         temp_stall_ts = 0;
 231         return err;
 232 }
 233
 234 static int file_size(struct thread_data *td, struct fio_file *f)
 235 {
 236         struct stat st;
 237
 238         if (td->overwrite) {
 239                 if (fstat(f->fd, &st) == -1) {
 240                         td_verror(td, errno, "fstat");
 241                         return 1;
 242                 }
 243
 244                 f->real_file_size = st.st_size;
 245
 246                 if (!f->file_size || f->file_size > f->real_file_size)
 247                         f->file_size = f->real_file_size;
 248         } else
 249                 f->real_file_size = f->file_size;
 250
 251         return 0;
 252 }
 253
 254 static int bdev_size(struct thread_data *td, struct fio_file *f)
 255 {
 256         unsigned long long bytes;
 257         int r;
 258
 259         r = blockdev_size(f->fd, &bytes);
 260         if (r) {
 261                 td_verror(td, r, "blockdev_size");
 262                 return 1;
 263         }
 264
 265         f->real_file_size = bytes;
 266
 267         /*
 268          * no extend possibilities, so limit size to device size if too large
 269          */
 270         if (!f->file_size || f->file_size > f->real_file_size)
 271                 f->file_size = f->real_file_size;
 272
 273         f->file_size -= f->file_offset;
 274         return 0;
 275 }
 276
 277 static int get_file_size(struct thread_data *td, struct fio_file *f)
 278 {
 279         int ret = 0;
 280
 281         if (f->filetype == FIO_TYPE_FILE) {
 282                 if (!(f->flags & FIO_FILE_EXISTS))
 283                         ret = file_size(td, f);
 284         } else if (f->filetype == FIO_TYPE_BD)
 285                 ret = bdev_size(td, f);
 286         else
 287                 f->real_file_size = -1;
 288
 289         if (ret)
 290                 return ret;
 291
 292         if (f->file_offset > f->real_file_size) {
 293                 log_err("%s: offset extends end (%Lu > %Lu)\n", td->name, f->file_offset, f->real_file_size);
 294                 return 1;
 295         }
 296
 297         return 0;
 298 }
 299
 300 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
 301 {
 302         int ret = 0;
 303
 304         if (td->odirect)
 305                 return 0;
 306
 307         /*
 308          * FIXME: add blockdev flushing too
 309          */
 310         if (f->mmap)
 311                 ret = madvise(f->mmap, f->file_size, MADV_DONTNEED);
 312         else if (f->filetype == FIO_TYPE_FILE) {
 313                 ret = fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_DONTNEED);
 314         } else if (f->filetype == FIO_TYPE_BD) {
 315                 ret = blockdev_invalidate_cache(f->fd);
 316         } else if (f->filetype == FIO_TYPE_CHAR)
 317                 ret = 0;
 318
 319         if (ret < 0) {
 320                 td_verror(td, errno, "invalidate_cache");
 321                 return 1;
 322         }
 323
 324         return ret;
 325 }
 326
 327 void generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
 328 {
 329         close(f->fd);
 330         f->fd = -1;
 331 }
 332
 333 int generic_open_file(struct thread_data *td, struct fio_file *f)
 334 {
 335         int flags = 0;
 336
 337         if (td->odirect)
 338                 flags |= OS_O_DIRECT;
 339         if (td->sync_io)
 340                 flags |= O_SYNC;
 341
 342         if (td_write(td) || td_rw(td)) {
 343                 flags |= O_RDWR;
 344
 345                 if (f->filetype == FIO_TYPE_FILE)
 346                         flags |= O_CREAT;
 347
 348                 f->fd = open(f->file_name, flags, 0600);
 349         } else {
 350                 if (f->filetype == FIO_TYPE_CHAR)
 351                         flags |= O_RDWR;
 352                 else
 353                         flags |= O_RDONLY;
 354
 355                 f->fd = open(f->file_name, flags);
 356         }
 357
 358         if (f->fd == -1) {
 359                 int __e = errno;
 360
 361                 td_verror(td, __e, "open");
 362                 if (__e == EINVAL && td->odirect)
 363                         log_err("fio: destination does not support O_DIRECT\n");
 364                 if (__e == EMFILE)
 365                         log_err("fio: try reducing/setting openfiles (failed at %u of %u)\n", td->nr_open_files, td->nr_files);
 366                 return 1;
 367         }
 368
 369         if (get_file_size(td, f))
 370                 goto err;
 371
 372         if (td->invalidate_cache && file_invalidate_cache(td, f))
 373                 goto err;
 374
 375         if (!td_random(td)) {
 376                 if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_SEQUENTIAL) < 0) {
 377                         td_verror(td, errno, "fadvise");
 378                         goto err;
 379                 }
 380         } else {
 381                 if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_RANDOM) < 0) {
 382                         td_verror(td, errno, "fadvise");
 383                         goto err;
 384                 }
 385         }
 386
 387         return 0;
 388 err:
 389         close(f->fd);
 390         return 1;
 391 }
 392
 393 int open_files(struct thread_data *td)
 394 {
 395         struct fio_file *f;
 396         unsigned int i;
 397         int err = 0;
 398
 399         for_each_file(td, f, i) {
 400                 err = td_io_open_file(td, f);
 401                 if (err)
 402                         break;
 403
 404                 if (td->open_files == td->nr_open_files)
 405                         break;
 406         }
 407
 408         if (!err)
 409                 return 0;
 410
 411         for_each_file(td, f, i)
 412                 td_io_close_file(td, f);
 413
 414         return err;
 415 }
 416
 417 int setup_files(struct thread_data *td)
 418 {
 419         struct fio_file *f;
 420         unsigned int i;
 421         int err;
 422
 423         /*
 424          * if ioengine defines a setup() method, it's responsible for
 425          * setting up everything in the td->files[] area.
 426          */
 427         if (td->io_ops->setup)
 428                 return td->io_ops->setup(td);
 429
 430         if (create_files(td))
 431                 return 1;
 432
 433         err = open_files(td);
 434         if (err)
 435                 return err;
 436
 437         /*
 438          * Recalculate the total file size now that files are set up.
 439          */
 440         td->total_file_size = 0;
 441         for_each_file(td, f, i)
 442                 td->total_file_size += f->file_size;
 443
 444         td->io_size = td->total_file_size;
 445         if (td->io_size == 0) {
 446                 log_err("%s: no io blocks\n", td->name);
 447                 td_verror(td, EINVAL, "total_file_size");
 448                 return 1;
 449         }
 450
 451         if (!td->zone_size)
 452                 td->zone_size = td->io_size;
 453
 454         td->total_io_size = td->io_size * td->loops;
 455
 456         for_each_file(td, f, i)
 457                 td_io_close_file(td, f);
 458
 459         return err;
 460 }
 461
 462 void close_files(struct thread_data *td)
 463 {
 464         struct fio_file *f;
 465         unsigned int i;
 466
 467         for_each_file(td, f, i) {
 468                 if (!f->file_name && (f->flags & FIO_FILE_UNLINK) &&
 469                     f->filetype == FIO_TYPE_FILE) {
 470                         unlink(f->file_name);
 471                         free(f->file_name);
 472                         f->file_name = NULL;
 473                 }
 474
 475                 td_io_close_file(td, f);
 476
 477                 if (f->file_map)
 478                         free(f->file_map);
 479         }
 480
 481         td->filename = NULL;
 482         td->files = NULL;
 483         td->nr_files = 0;
 484 }
 485
 486 static void get_file_type(struct fio_file *f)
 487 {
 488         struct stat sb;
 489
 490         f->filetype = FIO_TYPE_FILE;
 491
 492         if (!lstat(f->file_name, &sb)) {
 493                 f->flags |= FIO_FILE_EXISTS;
 494
 495                 if (S_ISBLK(sb.st_mode))
 496                         f->filetype = FIO_TYPE_BD;
 497                 else if (S_ISCHR(sb.st_mode))
 498                         f->filetype = FIO_TYPE_CHAR;
 499                 else {
 500                         /*
 501                          * might as well do this here, and save a stat later on
 502                          */
 503                         f->real_file_size = sb.st_size;
 504                         f->file_size = f->real_file_size;
 505                 }
 506         }
 507 }
 508
 509 void add_file(struct thread_data *td, const char *fname)
 510 {
 511         int cur_files = td->files_index;
 512         struct fio_file *f;
 513
 514         td->files = realloc(td->files, (cur_files + 1) * sizeof(*f));
 515
 516         f = &td->files[cur_files];
 517         memset(f, 0, sizeof(*f));
 518         f->fd = -1;
 519         f->file_name = strdup(fname);
 520
 521         get_file_type(f);
 522
 523         td->files_index++;
 524         if (f->filetype == FIO_TYPE_FILE)
 525                 td->nr_normal_files++;
 526 }
 527
 528 void get_file(struct fio_file *f)
 529 {
 530         f->references++;
 531 }
 532
 533 void put_file(struct thread_data *td, struct fio_file *f)
 534 {
 535         if (!(f->flags & FIO_FILE_OPEN))
 536                 return;
 537
 538         assert(f->references);
 539         if (--f->references)
 540                 return;
 541
 542         if (should_fsync(td) && td->fsync_on_close)
 543                 fsync(f->fd);
 544
 545         if (td->io_ops->close_file)
 546                 td->io_ops->close_file(td, f);
 547         td->nr_open_files--;
 548         f->flags &= ~FIO_FILE_OPEN;
 549 }
 550
 551 static int recurse_dir(struct thread_data *td, const char *dirname)
 552 {
 553         struct dirent *dir;
 554         int ret = 0;
 555         DIR *D;
 556
 557         D = opendir(dirname);
 558         if (!D) {
 559                 td_verror(td, errno, "opendir");
 560                 return 1;
 561         }
 562
 563         while ((dir = readdir(D)) != NULL) {
 564                 char full_path[PATH_MAX];
 565                 struct stat sb;
 566
 567                 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
 568                         continue;
 569
 570                 sprintf(full_path, "%s/%s", dirname, dir->d_name);
 571
 572                 if (lstat(full_path, &sb) == -1) {
 573                         if (errno != ENOENT) {
 574                                 td_verror(td, errno, "stat");
 575                                 return 1;
 576                         }
 577                 }
 578
 579                 if (S_ISREG(sb.st_mode)) {
 580                         add_file(td, full_path);
 581                         td->nr_files++;
 582                         continue;
 583                 }
 584
 585                 if ((ret = recurse_dir(td, full_path)) != 0)
 586                         break;
 587         }
 588
 589         closedir(D);
 590         return ret;
 591 }
 592
 593 int add_dir_files(struct thread_data *td, const char *path)
 594 {
 595         return recurse_dir(td, path);
 596 }