filesetup.c

   1 #include <unistd.h>
   2 #include <fcntl.h>
   3 #include <string.h>
   4 #include <assert.h>
   5 #include <dirent.h>
   6 #include <libgen.h>
   7 #include <sys/stat.h>
   8 #include <sys/mman.h>
   9 #include <sys/types.h>
  10
  11 #include "fio.h"
  12 #include "smalloc.h"
  13 #include "filehash.h"
  14 #include "os/os.h"
  15
  16 static int root_warn;
  17
  18 static inline void clear_error(struct thread_data *td)
  19 {
  20         td->error = 0;
  21         td->verror[0] = '\0';
  22 }
  23
  24 /*
  25  * Leaves f->fd open on success, caller must close
  26  */
  27 static int extend_file(struct thread_data *td, struct fio_file *f)
  28 {
  29         int r, new_layout = 0, unlink_file = 0, flags;
  30         unsigned long long left;
  31         unsigned int bs;
  32         char *b;
  33
  34         if (read_only) {
  35                 log_err("fio: refusing extend of file due to read-only\n");
  36                 return 0;
  37         }
  38
  39         /*
  40          * check if we need to lay the file out complete again. fio
  41          * does that for operations involving reads, or for writes
  42          * where overwrite is set
  43          */
  44         if (td_read(td) || (td_write(td) && td->o.overwrite) ||
  45             (td_write(td) && td->io_ops->flags & FIO_NOEXTEND))
  46                 new_layout = 1;
  47         if (td_write(td) && !td->o.overwrite)
  48                 unlink_file = 1;
  49
  50         if (unlink_file || new_layout) {
  51                 dprint(FD_FILE, "layout unlink %s\n", f->file_name);
  52                 if ((unlink(f->file_name) < 0) && (errno != ENOENT)) {
  53                         td_verror(td, errno, "unlink");
  54                         return 1;
  55                 }
  56         }
  57
  58         flags = O_WRONLY | O_CREAT;
  59         if (new_layout)
  60                 flags |= O_TRUNC;
  61
  62         dprint(FD_FILE, "open file %s, flags %x\n", f->file_name, flags);
  63         f->fd = open(f->file_name, flags, 0644);
  64         if (f->fd < 0) {
  65                 td_verror(td, errno, "open");
  66                 return 1;
  67         }
  68
  69 #ifdef FIO_HAVE_FALLOCATE
  70         if (td->o.fallocate && !td->o.fill_device) {
  71                 dprint(FD_FILE, "fallocate file %s size %llu\n", f->file_name,
  72                                                         f->real_file_size);
  73
  74                 r = posix_fallocate(f->fd, 0, f->real_file_size);
  75                 if (r > 0) {
  76                         log_err("fio: posix_fallocate fails: %s\n",
  77                                         strerror(r));
  78                 }
  79         }
  80 #endif
  81
  82         if (!new_layout)
  83                 goto done;
  84
  85         /*
  86          * The size will be -1ULL when fill_device is used, so don't truncate
  87          * or fallocate this file, just write it
  88          */
  89         if (!td->o.fill_device) {
  90                 dprint(FD_FILE, "truncate file %s, size %llu\n", f->file_name,
  91                                                         f->real_file_size);
  92                 if (ftruncate(f->fd, f->real_file_size) == -1) {
  93                         td_verror(td, errno, "ftruncate");
  94                         goto err;
  95                 }
  96         }
  97
  98         b = malloc(td->o.max_bs[DDIR_WRITE]);
  99         memset(b, 0, td->o.max_bs[DDIR_WRITE]);
 100
 101         left = f->real_file_size;
 102         while (left && !td->terminate) {
 103                 bs = td->o.max_bs[DDIR_WRITE];
 104                 if (bs > left)
 105                         bs = left;
 106
 107                 r = write(f->fd, b, bs);
 108
 109                 if (r > 0) {
 110                         left -= r;
 111                         continue;
 112                 } else {
 113                         if (r < 0) {
 114                                 int __e = errno;
 115
 116                                 if (__e == ENOSPC) {
 117                                         if (td->o.fill_device)
 118                                                 break;
 119                                         log_info("fio: ENOSPC on laying out "
 120                                                  "file, stopping\n");
 121                                         break;
 122                                 }
 123                                 td_verror(td, errno, "write");
 124                         } else
 125                                 td_verror(td, EIO, "write");
 126
 127                         break;
 128                 }
 129         }
 130
 131         if (td->terminate) {
 132                 dprint(FD_FILE, "terminate unlink %s\n", f->file_name);
 133                 unlink(f->file_name);
 134         } else if (td->o.create_fsync) {
 135                 if (fsync(f->fd) < 0) {
 136                         td_verror(td, errno, "fsync");
 137                         goto err;
 138                 }
 139         }
 140         if (td->o.fill_device && !td_write(td)) {
 141                 fio_file_clear_size_known(f);
 142                 if (td_io_get_file_size(td, f))
 143                         goto err;
 144                 if (f->io_size > f->real_file_size)
 145                         f->io_size = f->real_file_size;
 146         }
 147
 148         free(b);
 149 done:
 150         return 0;
 151 err:
 152         close(f->fd);
 153         f->fd = -1;
 154         return 1;
 155 }
 156
 157 static int pre_read_file(struct thread_data *td, struct fio_file *f)
 158 {
 159         int r, did_open = 0, old_runstate;
 160         unsigned long long left;
 161         unsigned int bs;
 162         char *b;
 163
 164         if (td->io_ops->flags & FIO_PIPEIO)
 165                 return 0;
 166
 167         if (!fio_file_open(f)) {
 168                 if (td->io_ops->open_file(td, f)) {
 169                         log_err("fio: cannot pre-read, failed to open file\n");
 170                         return 1;
 171                 }
 172                 did_open = 1;
 173         }
 174
 175         old_runstate = td->runstate;
 176         td_set_runstate(td, TD_PRE_READING);
 177
 178         bs = td->o.max_bs[DDIR_READ];
 179         b = malloc(bs);
 180         memset(b, 0, bs);
 181
 182         lseek(f->fd, f->file_offset, SEEK_SET);
 183         left = f->io_size;
 184
 185         while (left && !td->terminate) {
 186                 if (bs > left)
 187                         bs = left;
 188
 189                 r = read(f->fd, b, bs);
 190
 191                 if (r == (int) bs) {
 192                         left -= bs;
 193                         continue;
 194                 } else {
 195                         td_verror(td, EIO, "pre_read");
 196                         break;
 197                 }
 198         }
 199
 200         td_set_runstate(td, old_runstate);
 201
 202         if (did_open)
 203                 td->io_ops->close_file(td, f);
 204         free(b);
 205         return 0;
 206 }
 207
 208 static unsigned long long get_rand_file_size(struct thread_data *td)
 209 {
 210         unsigned long long ret, sized;
 211         long r;
 212
 213         r = os_random_long(&td->file_size_state);
 214         sized = td->o.file_size_high - td->o.file_size_low;
 215         ret = (unsigned long long) ((double) sized * (r / (OS_RAND_MAX + 1.0)));
 216         ret += td->o.file_size_low;
 217         ret -= (ret % td->o.rw_min_bs);
 218         return ret;
 219 }
 220
 221 static int file_size(struct thread_data *td, struct fio_file *f)
 222 {
 223         struct stat st;
 224
 225         if (stat(f->file_name, &st) == -1) {
 226                 td_verror(td, errno, "fstat");
 227                 return 1;
 228         }
 229
 230         f->real_file_size = st.st_size;
 231         return 0;
 232 }
 233
 234 static int bdev_size(struct thread_data *td, struct fio_file *f)
 235 {
 236         unsigned long long bytes = 0;
 237         int r;
 238
 239         if (td->io_ops->open_file(td, f)) {
 240                 log_err("fio: failed opening blockdev %s for size check\n",
 241                         f->file_name);
 242                 return 1;
 243         }
 244
 245         r = blockdev_size(f, &bytes);
 246         if (r) {
 247                 td_verror(td, r, "blockdev_size");
 248                 printf("fd is %d\n", f->fd);
 249                 goto err;
 250         }
 251
 252         if (!bytes) {
 253                 log_err("%s: zero sized block device?\n", f->file_name);
 254                 goto err;
 255         }
 256
 257         f->real_file_size = bytes;
 258         td->io_ops->close_file(td, f);
 259         return 0;
 260 err:
 261         td->io_ops->close_file(td, f);
 262         return 1;
 263 }
 264
 265 static int char_size(struct thread_data *td, struct fio_file *f)
 266 {
 267 #ifdef FIO_HAVE_CHARDEV_SIZE
 268         unsigned long long bytes = 0;
 269         int r;
 270
 271         if (td->io_ops->open_file(td, f)) {
 272                 log_err("fio: failed opening blockdev %s for size check\n",
 273                         f->file_name);
 274                 return 1;
 275         }
 276
 277         r = chardev_size(f, &bytes);
 278         if (r) {
 279                 td_verror(td, r, "chardev_size");
 280                 goto err;
 281         }
 282
 283         if (!bytes) {
 284                 log_err("%s: zero sized char device?\n", f->file_name);
 285                 goto err;
 286         }
 287
 288         f->real_file_size = bytes;
 289         td->io_ops->close_file(td, f);
 290         return 0;
 291 err:
 292         td->io_ops->close_file(td, f);
 293         return 1;
 294 #else
 295         f->real_file_size = -1ULL;
 296         return 0;
 297 #endif
 298 }
 299
 300 static int get_file_size(struct thread_data *td, struct fio_file *f)
 301 {
 302         int ret = 0;
 303
 304         if (fio_file_size_known(f))
 305                 return 0;
 306
 307         if (f->filetype == FIO_TYPE_FILE)
 308                 ret = file_size(td, f);
 309         else if (f->filetype == FIO_TYPE_BD)
 310                 ret = bdev_size(td, f);
 311         else if (f->filetype == FIO_TYPE_CHAR)
 312                 ret = char_size(td, f);
 313         else
 314                 f->real_file_size = -1;
 315
 316         if (ret)
 317                 return ret;
 318
 319         if (f->file_offset > f->real_file_size) {
 320                 log_err("%s: offset extends end (%llu > %llu)\n", td->o.name,
 321                                         f->file_offset, f->real_file_size);
 322                 return 1;
 323         }
 324
 325         fio_file_set_size_known(f);
 326         return 0;
 327 }
 328
 329 static int __file_invalidate_cache(struct thread_data *td, struct fio_file *f,
 330                                    unsigned long long off,
 331                                    unsigned long long len)
 332 {
 333         int ret = 0;
 334
 335         if (len == -1ULL)
 336                 len = f->io_size;
 337         if (off == -1ULL)
 338                 off = f->file_offset;
 339
 340         if (len == -1ULL || off == -1ULL)
 341                 return 0;
 342
 343         dprint(FD_IO, "invalidate cache %s: %llu/%llu\n", f->file_name, off,
 344                                                                 len);
 345
 346         /*
 347          * FIXME: add blockdev flushing too
 348          */
 349         if (f->mmap_ptr) {
 350                 ret = posix_madvise(f->mmap_ptr, f->mmap_sz, POSIX_MADV_DONTNEED);
 351 #ifdef FIO_MADV_FREE
 352                 (void) posix_madvise(f->mmap_ptr, f->mmap_sz, FIO_MADV_FREE);
 353 #endif
 354         } else if (f->filetype == FIO_TYPE_FILE) {
 355                 ret = posix_fadvise(f->fd, off, len, POSIX_FADV_DONTNEED);
 356         } else if (f->filetype == FIO_TYPE_BD) {
 357                 ret = blockdev_invalidate_cache(f);
 358                 if (ret < 0 && errno == EACCES && geteuid()) {
 359                         if (!root_warn) {
 360                                 log_err("fio: only root may flush block "
 361                                         "devices. Cache flush bypassed!\n");
 362                                 root_warn = 1;
 363                         }
 364                         ret = 0;
 365                 }
 366         } else if (f->filetype == FIO_TYPE_CHAR || f->filetype == FIO_TYPE_PIPE)
 367                 ret = 0;
 368
 369         if (ret < 0) {
 370                 td_verror(td, errno, "invalidate_cache");
 371                 return 1;
 372         } else if (ret > 0) {
 373                 td_verror(td, ret, "invalidate_cache");
 374                 return 1;
 375         }
 376
 377         return ret;
 378
 379 }
 380
 381 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
 382 {
 383         if (!fio_file_open(f))
 384                 return 0;
 385
 386         return __file_invalidate_cache(td, f, -1ULL, -1ULL);
 387 }
 388
 389 int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
 390 {
 391         int ret = 0;
 392
 393         dprint(FD_FILE, "fd close %s\n", f->file_name);
 394
 395         remove_file_hash(f);
 396
 397         if (close(f->fd) < 0)
 398                 ret = errno;
 399
 400         f->fd = -1;
 401         return ret;
 402 }
 403
 404 static int file_lookup_open(struct fio_file *f, int flags)
 405 {
 406         struct fio_file *__f;
 407         int from_hash;
 408
 409         __f = lookup_file_hash(f->file_name);
 410         if (__f) {
 411                 dprint(FD_FILE, "found file in hash %s\n", f->file_name);
 412                 /*
 413                  * racy, need the __f->lock locked
 414                  */
 415                 f->lock = __f->lock;
 416                 f->lock_owner = __f->lock_owner;
 417                 f->lock_batch = __f->lock_batch;
 418                 f->lock_ddir = __f->lock_ddir;
 419                 from_hash = 1;
 420         } else {
 421                 dprint(FD_FILE, "file not found in hash %s\n", f->file_name);
 422                 from_hash = 0;
 423         }
 424
 425         f->fd = open(f->file_name, flags, 0600);
 426         return from_hash;
 427 }
 428
 429 int generic_open_file(struct thread_data *td, struct fio_file *f)
 430 {
 431         int is_std = 0;
 432         int flags = 0;
 433         int from_hash = 0;
 434
 435         dprint(FD_FILE, "fd open %s\n", f->file_name);
 436
 437         if (!strcmp(f->file_name, "-")) {
 438                 if (td_rw(td)) {
 439                         log_err("fio: can't read/write to stdin/out\n");
 440                         return 1;
 441                 }
 442                 is_std = 1;
 443
 444                 /*
 445                  * move output logging to stderr, if we are writing to stdout
 446                  */
 447                 if (td_write(td))
 448                         f_out = stderr;
 449         }
 450
 451         if (td->o.odirect)
 452                 flags |= OS_O_DIRECT;
 453         if (td->o.sync_io)
 454                 flags |= O_SYNC;
 455         if (f->filetype != FIO_TYPE_FILE)
 456                 flags |= FIO_O_NOATIME;
 457         if (td->o.create_on_open)
 458                 flags |= O_CREAT;
 459
 460 open_again:
 461         if (td_write(td)) {
 462                 if (!read_only)
 463                         flags |= O_RDWR;
 464
 465                 if (f->filetype == FIO_TYPE_FILE)
 466                         flags |= O_CREAT;
 467
 468                 if (is_std)
 469                         f->fd = dup(STDOUT_FILENO);
 470                 else
 471                         from_hash = file_lookup_open(f, flags);
 472         } else {
 473                 if (f->filetype == FIO_TYPE_CHAR && !read_only)
 474                         flags |= O_RDWR;
 475                 else
 476                         flags |= O_RDONLY;
 477
 478                 if (is_std)
 479                         f->fd = dup(STDIN_FILENO);
 480                 else
 481                         from_hash = file_lookup_open(f, flags);
 482         }
 483
 484         if (f->fd == -1) {
 485                 char buf[FIO_VERROR_SIZE];
 486                 int __e = errno;
 487
 488                 if (__e == EPERM && (flags & FIO_O_NOATIME)) {
 489                         flags &= ~FIO_O_NOATIME;
 490                         goto open_again;
 491                 }
 492
 493                 snprintf(buf, sizeof(buf) - 1, "open(%s)", f->file_name);
 494
 495                 td_verror(td, __e, buf);
 496         }
 497
 498         if (!from_hash && f->fd != -1) {
 499                 if (add_file_hash(f)) {
 500                         int ret;
 501
 502                         /*
 503                          * OK to ignore, we haven't done anything with it
 504                          */
 505                         ret = generic_close_file(td, f);
 506                         goto open_again;
 507                 }
 508         }
 509
 510         return 0;
 511 }
 512
 513 int generic_get_file_size(struct thread_data *td, struct fio_file *f)
 514 {
 515         return get_file_size(td, f);
 516 }
 517
 518 /*
 519  * open/close all files, so that ->real_file_size gets set
 520  */
 521 static int get_file_sizes(struct thread_data *td)
 522 {
 523         struct fio_file *f;
 524         unsigned int i;
 525         int err = 0;
 526
 527         for_each_file(td, f, i) {
 528                 dprint(FD_FILE, "get file size for %p/%d/%p\n", f, i,
 529                                                                 f->file_name);
 530
 531                 if (td_io_get_file_size(td, f)) {
 532                         if (td->error != ENOENT) {
 533                                 log_err("%s\n", td->verror);
 534                                 err = 1;
 535                         }
 536                         clear_error(td);
 537                 }
 538
 539                 if (f->real_file_size == -1ULL && td->o.size)
 540                         f->real_file_size = td->o.size / td->o.nr_files;
 541         }
 542
 543         return err;
 544 }
 545
 546 struct fio_mount {
 547         struct flist_head list;
 548         const char *base;
 549         char __base[256];
 550         unsigned int key;
 551 };
 552
 553 /*
 554  * Get free number of bytes for each file on each unique mount.
 555  */
 556 static unsigned long long get_fs_free_counts(struct thread_data *td)
 557 {
 558         struct flist_head *n, *tmp;
 559         unsigned long long ret = 0;
 560         struct fio_mount *fm;
 561         FLIST_HEAD(list);
 562         struct fio_file *f;
 563         unsigned int i;
 564
 565         for_each_file(td, f, i) {
 566                 struct stat sb;
 567                 char buf[256];
 568
 569                 if (f->filetype == FIO_TYPE_BD || f->filetype == FIO_TYPE_CHAR) {
 570                         if (f->real_file_size != -1ULL)
 571                                 ret += f->real_file_size;
 572                         continue;
 573                 } else if (f->filetype != FIO_TYPE_FILE)
 574                         continue;
 575
 576                 strcpy(buf, f->file_name);
 577
 578                 if (stat(buf, &sb) < 0) {
 579                         if (errno != ENOENT)
 580                                 break;
 581                         strcpy(buf, ".");
 582                         if (stat(buf, &sb) < 0)
 583                                 break;
 584                 }
 585
 586                 fm = NULL;
 587                 flist_for_each(n, &list) {
 588                         fm = flist_entry(n, struct fio_mount, list);
 589                         if (fm->key == sb.st_dev)
 590                                 break;
 591
 592                         fm = NULL;
 593                 }
 594
 595                 if (fm)
 596                         continue;
 597
 598                 fm = malloc(sizeof(*fm));
 599                 strcpy(fm->__base, buf);
 600                 fm->base = basename(fm->__base);
 601                 fm->key = sb.st_dev;
 602                 flist_add(&fm->list, &list);
 603         }
 604
 605         flist_for_each_safe(n, tmp, &list) {
 606                 unsigned long long sz;
 607
 608                 fm = flist_entry(n, struct fio_mount, list);
 609                 flist_del(&fm->list);
 610
 611                 sz = get_fs_size(fm->base);
 612                 if (sz && sz != -1ULL)
 613                         ret += sz;
 614
 615                 free(fm);
 616         }
 617
 618         return ret;
 619 }
 620
 621 /*
 622  * Open the files and setup files sizes, creating files if necessary.
 623  */
 624 int setup_files(struct thread_data *td)
 625 {
 626         unsigned long long total_size, extend_size;
 627         struct fio_file *f;
 628         unsigned int i;
 629         int err = 0, need_extend;
 630
 631         dprint(FD_FILE, "setup files\n");
 632
 633         if (td->o.read_iolog_file)
 634                 return 0;
 635
 636         /*
 637          * if ioengine defines a setup() method, it's responsible for
 638          * opening the files and setting f->real_file_size to indicate
 639          * the valid range for that file.
 640          */
 641         if (td->io_ops->setup)
 642                 err = td->io_ops->setup(td);
 643         else
 644                 err = get_file_sizes(td);
 645
 646         if (err)
 647                 return err;
 648
 649         /*
 650          * check sizes. if the files/devices do not exist and the size
 651          * isn't passed to fio, abort.
 652          */
 653         total_size = 0;
 654         for_each_file(td, f, i) {
 655                 if (f->real_file_size == -1ULL)
 656                         total_size = -1ULL;
 657                 else
 658                         total_size += f->real_file_size;
 659         }
 660
 661         if (td->o.fill_device)
 662                 td->fill_device_size = get_fs_free_counts(td);
 663
 664         /*
 665          * device/file sizes are zero and no size given, punt
 666          */
 667         if ((!total_size || total_size == -1ULL) && !td->o.size &&
 668             !(td->io_ops->flags & FIO_NOIO) && !td->o.fill_device) {
 669                 log_err("%s: you need to specify size=\n", td->o.name);
 670                 td_verror(td, EINVAL, "total_file_size");
 671                 return 1;
 672         }
 673
 674         /*
 675          * now file sizes are known, so we can set ->io_size. if size= is
 676          * not given, ->io_size is just equal to ->real_file_size. if size
 677          * is given, ->io_size is size / nr_files.
 678          */
 679         extend_size = total_size = 0;
 680         need_extend = 0;
 681         for_each_file(td, f, i) {
 682                 f->file_offset = td->o.start_offset;
 683
 684                 if (!td->o.file_size_low) {
 685                         /*
 686                          * no file size range given, file size is equal to
 687                          * total size divided by number of files. if that is
 688                          * zero, set it to the real file size.
 689                          */
 690                         f->io_size = td->o.size / td->o.nr_files;
 691                         if (!f->io_size)
 692                                 f->io_size = f->real_file_size - f->file_offset;
 693                 } else if (f->real_file_size < td->o.file_size_low ||
 694                            f->real_file_size > td->o.file_size_high) {
 695                         if (f->file_offset > td->o.file_size_low)
 696                                 goto err_offset;
 697                         /*
 698                          * file size given. if it's fixed, use that. if it's a
 699                          * range, generate a random size in-between.
 700                          */
 701                         if (td->o.file_size_low == td->o.file_size_high) {
 702                                 f->io_size = td->o.file_size_low
 703                                                 - f->file_offset;
 704                         } else {
 705                                 f->io_size = get_rand_file_size(td)
 706                                                 - f->file_offset;
 707                         }
 708                 } else
 709                         f->io_size = f->real_file_size - f->file_offset;
 710
 711                 if (f->io_size == -1ULL)
 712                         total_size = -1ULL;
 713                 else
 714                         total_size += f->io_size;
 715
 716                 if (f->filetype == FIO_TYPE_FILE &&
 717                     (f->io_size + f->file_offset) > f->real_file_size &&
 718                     !(td->io_ops->flags & FIO_DISKLESSIO)) {
 719                         if (!td->o.create_on_open) {
 720                                 need_extend++;
 721                                 extend_size += (f->io_size + f->file_offset);
 722                         } else
 723                                 f->real_file_size = f->io_size + f->file_offset;
 724                         fio_file_set_extend(f);
 725                 }
 726         }
 727
 728         if (!td->o.size || td->o.size > total_size)
 729                 td->o.size = total_size;
 730
 731         /*
 732          * See if we need to extend some files
 733          */
 734         if (need_extend) {
 735                 temp_stall_ts = 1;
 736                 if (!terse_output)
 737                         log_info("%s: Laying out IO file(s) (%u file(s) /"
 738                                  " %lluMB)\n", td->o.name, need_extend,
 739                                         extend_size >> 20);
 740
 741                 for_each_file(td, f, i) {
 742                         unsigned long long old_len = -1ULL, extend_len = -1ULL;
 743
 744                         if (!fio_file_extend(f))
 745                                 continue;
 746
 747                         assert(f->filetype == FIO_TYPE_FILE);
 748                         fio_file_clear_extend(f);
 749                         if (!td->o.fill_device) {
 750                                 old_len = f->real_file_size;
 751                                 extend_len = f->io_size + f->file_offset -
 752                                                 old_len;
 753                         }
 754                         f->real_file_size = (f->io_size + f->file_offset);
 755                         err = extend_file(td, f);
 756                         if (err)
 757                                 break;
 758
 759                         err = __file_invalidate_cache(td, f, old_len,
 760                                                                 extend_len);
 761                         close(f->fd);
 762                         f->fd = -1;
 763                         if (err)
 764                                 break;
 765                 }
 766                 temp_stall_ts = 0;
 767         }
 768
 769         if (err)
 770                 return err;
 771
 772         if (!td->o.zone_size)
 773                 td->o.zone_size = td->o.size;
 774
 775         /*
 776          * iolog already set the total io size, if we read back
 777          * stored entries.
 778          */
 779         if (!td->o.read_iolog_file)
 780                 td->total_io_size = td->o.size * td->o.loops;
 781         return 0;
 782 err_offset:
 783         log_err("%s: you need to specify valid offset=\n", td->o.name);
 784         return 1;
 785 }
 786
 787 int pre_read_files(struct thread_data *td)
 788 {
 789         struct fio_file *f;
 790         unsigned int i;
 791
 792         dprint(FD_FILE, "pre_read files\n");
 793
 794         for_each_file(td, f, i) {
 795                 pre_read_file(td, f);
 796         }
 797
 798         return 1;
 799 }
 800
 801 int init_random_map(struct thread_data *td)
 802 {
 803         unsigned long long blocks, num_maps;
 804         struct fio_file *f;
 805         unsigned int i;
 806
 807         if (td->o.norandommap || !td_random(td))
 808                 return 0;
 809
 810         for_each_file(td, f, i) {
 811                 blocks = (f->real_file_size + td->o.rw_min_bs - 1) /
 812                                 (unsigned long long) td->o.rw_min_bs;
 813                 num_maps = (blocks + BLOCKS_PER_MAP - 1) /
 814                                 (unsigned long long) BLOCKS_PER_MAP;
 815                 f->file_map = smalloc(num_maps * sizeof(unsigned long));
 816                 if (f->file_map) {
 817                         f->num_maps = num_maps;
 818                         continue;
 819                 }
 820                 if (!td->o.softrandommap) {
 821                         log_err("fio: failed allocating random map. If running"
 822                                 " a large number of jobs, try the 'norandommap'"
 823                                 " option or set 'softrandommap'. Or give"
 824                                 " a larger --alloc-size to fio.\n");
 825                         return 1;
 826                 }
 827
 828                 log_info("fio: file %s failed allocating random map. Running "
 829                          "job without.\n", f->file_name);
 830                 f->num_maps = 0;
 831         }
 832
 833         return 0;
 834 }
 835
 836 void close_files(struct thread_data *td)
 837 {
 838         struct fio_file *f;
 839         unsigned int i;
 840
 841         for_each_file(td, f, i) {
 842                 if (fio_file_open(f))
 843                         td_io_close_file(td, f);
 844         }
 845 }
 846
 847 void close_and_free_files(struct thread_data *td)
 848 {
 849         struct fio_file *f;
 850         unsigned int i;
 851
 852         dprint(FD_FILE, "close files\n");
 853
 854         for_each_file(td, f, i) {
 855                 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
 856                         dprint(FD_FILE, "free unlink %s\n", f->file_name);
 857                         unlink(f->file_name);
 858                 }
 859
 860                 if (fio_file_open(f))
 861                         td_io_close_file(td, f);
 862
 863                 remove_file_hash(f);
 864
 865                 sfree(f->file_name);
 866                 f->file_name = NULL;
 867                 sfree(f->file_map);
 868                 f->file_map = NULL;
 869                 sfree(f);
 870         }
 871
 872         td->o.filename = NULL;
 873         free(td->files);
 874         td->files_index = 0;
 875         td->files = NULL;
 876         td->o.nr_files = 0;
 877 }
 878
 879 static void get_file_type(struct fio_file *f)
 880 {
 881         struct stat sb;
 882
 883         if (!strcmp(f->file_name, "-"))
 884                 f->filetype = FIO_TYPE_PIPE;
 885         else
 886                 f->filetype = FIO_TYPE_FILE;
 887
 888         if (!stat(f->file_name, &sb)) {
 889                 /* \\.\ is the device namespace in Windows, where every file is
 890                  * a block device */
 891                 if (S_ISBLK(sb.st_mode) || strncmp(f->file_name, "\\\\.\\", 4) == 0)
 892                         f->filetype = FIO_TYPE_BD;
 893                 else if (S_ISCHR(sb.st_mode))
 894                         f->filetype = FIO_TYPE_CHAR;
 895                 else if (S_ISFIFO(sb.st_mode))
 896                         f->filetype = FIO_TYPE_PIPE;
 897         }
 898 }
 899
 900 int add_file(struct thread_data *td, const char *fname)
 901 {
 902         int cur_files = td->files_index;
 903         char file_name[PATH_MAX];
 904         struct fio_file *f;
 905         int len = 0;
 906
 907         dprint(FD_FILE, "add file %s\n", fname);
 908
 909         f = smalloc(sizeof(*f));
 910         if (!f) {
 911                 log_err("fio: smalloc OOM\n");
 912                 assert(0);
 913         }
 914
 915         f->fd = -1;
 916         fio_file_reset(f);
 917
 918         if (td->files_size <= td->files_index) {
 919                 int new_size = td->o.nr_files + 1;
 920
 921                 dprint(FD_FILE, "resize file array to %d files\n", new_size);
 922
 923                 td->files = realloc(td->files, new_size * sizeof(f));
 924                 td->files_size = new_size;
 925         }
 926         td->files[cur_files] = f;
 927
 928         /*
 929          * init function, io engine may not be loaded yet
 930          */
 931         if (td->io_ops && (td->io_ops->flags & FIO_DISKLESSIO))
 932                 f->real_file_size = -1ULL;
 933
 934         if (td->o.directory)
 935                 len = sprintf(file_name, "%s/", td->o.directory);
 936
 937         sprintf(file_name + len, "%s", fname);
 938         f->file_name = smalloc_strdup(file_name);
 939         if (!f->file_name) {
 940                 log_err("fio: smalloc OOM\n");
 941                 assert(0);
 942         }
 943
 944         get_file_type(f);
 945
 946         switch (td->o.file_lock_mode) {
 947         case FILE_LOCK_NONE:
 948                 break;
 949         case FILE_LOCK_READWRITE:
 950                 f->lock = fio_mutex_rw_init();
 951                 break;
 952         case FILE_LOCK_EXCLUSIVE:
 953                 f->lock = fio_mutex_init(1);
 954                 break;
 955         default:
 956                 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
 957                 assert(0);
 958         }
 959
 960         td->files_index++;
 961         if (f->filetype == FIO_TYPE_FILE)
 962                 td->nr_normal_files++;
 963
 964         dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name,
 965                                                         cur_files);
 966
 967         return cur_files;
 968 }
 969
 970 int add_file_exclusive(struct thread_data *td, const char *fname)
 971 {
 972         struct fio_file *f;
 973         unsigned int i;
 974
 975         for_each_file(td, f, i) {
 976                 if (!strcmp(f->file_name, fname))
 977                         return i;
 978         }
 979
 980         return add_file(td, fname);
 981 }
 982
 983 void get_file(struct fio_file *f)
 984 {
 985         dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
 986         assert(fio_file_open(f));
 987         f->references++;
 988 }
 989
 990 int put_file(struct thread_data *td, struct fio_file *f)
 991 {
 992         int f_ret = 0, ret = 0;
 993
 994         dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
 995
 996         if (!fio_file_open(f)) {
 997                 assert(f->fd == -1);
 998                 return 0;
 999         }
1000
1001         assert(f->references);
1002         if (--f->references)
1003                 return 0;
1004
1005         if (should_fsync(td) && td->o.fsync_on_close)
1006                 f_ret = fsync(f->fd);
1007
1008         if (td->io_ops->close_file)
1009                 ret = td->io_ops->close_file(td, f);
1010
1011         if (!ret)
1012                 ret = f_ret;
1013
1014         td->nr_open_files--;
1015         fio_file_clear_open(f);
1016         assert(f->fd == -1);
1017         return ret;
1018 }
1019
1020 void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
1021 {
1022         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1023                 return;
1024
1025         if (f->lock_owner == td && f->lock_batch--)
1026                 return;
1027
1028         if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
1029                 if (ddir == DDIR_READ)
1030                         fio_mutex_down_read(f->lock);
1031                 else
1032                         fio_mutex_down_write(f->lock);
1033         } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1034                 fio_mutex_down(f->lock);
1035
1036         f->lock_owner = td;
1037         f->lock_batch = td->o.lockfile_batch;
1038         f->lock_ddir = ddir;
1039 }
1040
1041 void unlock_file(struct thread_data *td, struct fio_file *f)
1042 {
1043         if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1044                 return;
1045         if (f->lock_batch)
1046                 return;
1047
1048         if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
1049                 const int is_read = f->lock_ddir == DDIR_READ;
1050                 int val = fio_mutex_getval(f->lock);
1051
1052                 if ((is_read && val == 1) || (!is_read && val == -1))
1053                         f->lock_owner = NULL;
1054
1055                 if (is_read)
1056                         fio_mutex_up_read(f->lock);
1057                 else
1058                         fio_mutex_up_write(f->lock);
1059         } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE) {
1060                 int val = fio_mutex_getval(f->lock);
1061
1062                 if (val == 0)
1063                         f->lock_owner = NULL;
1064
1065                 fio_mutex_up(f->lock);
1066         }
1067 }
1068
1069 void unlock_file_all(struct thread_data *td, struct fio_file *f)
1070 {
1071         if (f->lock_owner != td)
1072                 return;
1073
1074         f->lock_batch = 0;
1075         unlock_file(td, f);
1076 }
1077
1078 static int recurse_dir(struct thread_data *td, const char *dirname)
1079 {
1080         struct dirent *dir;
1081         int ret = 0;
1082         DIR *D;
1083
1084         D = opendir(dirname);
1085         if (!D) {
1086                 char buf[FIO_VERROR_SIZE];
1087
1088                 snprintf(buf, FIO_VERROR_SIZE - 1, "opendir(%s)", dirname);
1089                 td_verror(td, errno, buf);
1090                 return 1;
1091         }
1092
1093         while ((dir = readdir(D)) != NULL) {
1094                 char full_path[PATH_MAX];
1095                 struct stat sb;
1096
1097                 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
1098                         continue;
1099
1100                 sprintf(full_path, "%s/%s", dirname, dir->d_name);
1101
1102                 if (lstat(full_path, &sb) == -1) {
1103                         if (errno != ENOENT) {
1104                                 td_verror(td, errno, "stat");
1105                                 return 1;
1106                         }
1107                 }
1108
1109                 if (S_ISREG(sb.st_mode)) {
1110                         add_file(td, full_path);
1111                         td->o.nr_files++;
1112                         continue;
1113                 }
1114                 if (!S_ISDIR(sb.st_mode))
1115                         continue;
1116
1117                 ret = recurse_dir(td, full_path);
1118                 if (ret)
1119                         break;
1120         }
1121
1122         closedir(D);
1123         return ret;
1124 }
1125
1126 int add_dir_files(struct thread_data *td, const char *path)
1127 {
1128         int ret = recurse_dir(td, path);
1129
1130         if (!ret)
1131                 log_info("fio: opendir added %d files\n", td->o.nr_files);
1132
1133         return ret;
1134 }
1135
1136 void dup_files(struct thread_data *td, struct thread_data *org)
1137 {
1138         struct fio_file *f;
1139         unsigned int i;
1140
1141         dprint(FD_FILE, "dup files: %d\n", org->files_index);
1142
1143         if (!org->files)
1144                 return;
1145
1146         td->files = malloc(org->files_index * sizeof(f));
1147
1148         for_each_file(org, f, i) {
1149                 struct fio_file *__f;
1150
1151                 __f = smalloc(sizeof(*__f));
1152                 if (!__f) {
1153                         log_err("fio: smalloc OOM\n");
1154                         assert(0);
1155                 }
1156                 __f->fd = -1;
1157                 fio_file_reset(__f);
1158
1159                 if (f->file_name) {
1160                         __f->file_name = smalloc_strdup(f->file_name);
1161                         if (!__f->file_name) {
1162                                 log_err("fio: smalloc OOM\n");
1163                                 assert(0);
1164                         }
1165
1166                         __f->filetype = f->filetype;
1167                 }
1168
1169                 td->files[i] = __f;
1170         }
1171 }
1172
1173 /*
1174  * Returns the index that matches the filename, or -1 if not there
1175  */
1176 int get_fileno(struct thread_data *td, const char *fname)
1177 {
1178         struct fio_file *f;
1179         unsigned int i;
1180
1181         for_each_file(td, f, i)
1182                 if (!strcmp(f->file_name, fname))
1183                         return i;
1184
1185         return -1;
1186 }
1187
1188 /*
1189  * For log usage, where we add/open/close files automatically
1190  */
1191 void free_release_files(struct thread_data *td)
1192 {
1193         close_files(td);
1194         td->files_index = 0;
1195         td->nr_normal_files = 0;
1196 }