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