17 * Leaves f->fd open on success, caller must close
19 static int extend_file(struct thread_data *td, struct fio_file *f)
21 int r, new_layout = 0, unlink_file = 0, flags;
22 unsigned long long left;
27 log_err("fio: refusing extend of file due to read-only\n");
32 * check if we need to lay the file out complete again. fio
33 * does that for operations involving reads, or for writes
34 * where overwrite is set
36 if (td_read(td) || (td_write(td) && td->o.overwrite) ||
37 (td_write(td) && td->io_ops->flags & FIO_NOEXTEND))
39 if (td_write(td) && !td->o.overwrite)
42 if (unlink_file || new_layout) {
43 dprint(FD_FILE, "layout unlink %s\n", f->file_name);
44 if ((unlink(f->file_name) < 0) && (errno != ENOENT)) {
45 td_verror(td, errno, "unlink");
50 flags = O_WRONLY | O_CREAT;
54 dprint(FD_FILE, "open file %s, flags %x\n", f->file_name, flags);
55 f->fd = open(f->file_name, flags, 0644);
57 td_verror(td, errno, "open");
64 dprint(FD_FILE, "truncate file %s, size %llu\n", f->file_name,
66 if (ftruncate(f->fd, f->real_file_size) == -1) {
67 td_verror(td, errno, "ftruncate");
71 #ifdef FIO_HAVE_FALLOCATE
72 dprint(FD_FILE, "fallocate file %s, size %llu\n", f->file_name,
74 r = posix_fallocate(f->fd, 0, f->real_file_size);
76 log_err("fio: posix_fallocate fails: %s\n", strerror(-r));
79 b = malloc(td->o.max_bs[DDIR_WRITE]);
80 memset(b, 0, td->o.max_bs[DDIR_WRITE]);
82 left = f->real_file_size;
83 while (left && !td->terminate) {
84 bs = td->o.max_bs[DDIR_WRITE];
88 r = write(f->fd, b, bs);
95 td_verror(td, errno, "write");
97 td_verror(td, EIO, "write");
104 dprint(FD_FILE, "terminate unlink %s\n", f->file_name);
105 unlink(f->file_name);
106 } else if (td->o.create_fsync) {
107 if (fsync(f->fd) < 0) {
108 td_verror(td, errno, "fsync");
122 static int pre_read_file(struct thread_data *td, struct fio_file *f)
125 unsigned long long left;
129 bs = td->o.max_bs[DDIR_READ];
133 lseek(f->fd, f->file_offset, SEEK_SET);
136 while (left && !td->terminate) {
140 r = read(f->fd, b, bs);
146 td_verror(td, EIO, "pre_read");
155 static unsigned long long get_rand_file_size(struct thread_data *td)
157 unsigned long long ret, sized;
160 r = os_random_long(&td->file_size_state);
161 sized = td->o.file_size_high - td->o.file_size_low;
162 ret = (unsigned long long) ((double) sized * (r / (OS_RAND_MAX + 1.0)));
163 ret += td->o.file_size_low;
164 ret -= (ret % td->o.rw_min_bs);
168 static int file_size(struct thread_data *td, struct fio_file *f)
172 if (stat(f->file_name, &st) == -1) {
173 td_verror(td, errno, "fstat");
177 f->real_file_size = st.st_size;
181 static int bdev_size(struct thread_data *td, struct fio_file *f)
183 unsigned long long bytes;
186 if (td->io_ops->open_file(td, f)) {
187 log_err("fio: failed opening blockdev %s for size check\n",
192 r = blockdev_size(f->fd, &bytes);
194 td_verror(td, r, "blockdev_size");
199 log_err("%s: zero sized block device?\n", f->file_name);
203 f->real_file_size = bytes;
206 td->io_ops->close_file(td, f);
210 static int get_file_size(struct thread_data *td, struct fio_file *f)
214 if (f->flags & FIO_SIZE_KNOWN)
217 if (f->filetype == FIO_TYPE_FILE)
218 ret = file_size(td, f);
219 else if (f->filetype == FIO_TYPE_BD)
220 ret = bdev_size(td, f);
222 f->real_file_size = -1;
227 if (f->file_offset > f->real_file_size) {
228 log_err("%s: offset extends end (%Lu > %Lu)\n", td->o.name,
229 f->file_offset, f->real_file_size);
233 f->flags |= FIO_SIZE_KNOWN;
237 static int __file_invalidate_cache(struct thread_data *td, struct fio_file *f,
238 unsigned long long off,
239 unsigned long long len)
246 off = f->file_offset;
248 dprint(FD_IO, "invalidate cache %s: %llu/%llu\n", f->file_name, off,
252 * FIXME: add blockdev flushing too
255 ret = madvise(f->mmap, len, MADV_DONTNEED);
256 else if (f->filetype == FIO_TYPE_FILE) {
257 ret = fadvise(f->fd, off, len, POSIX_FADV_DONTNEED);
258 } else if (f->filetype == FIO_TYPE_BD) {
259 ret = blockdev_invalidate_cache(f->fd);
260 if (ret < 0 && errno == EACCES && geteuid()) {
262 log_err("fio: only root may flush block "
263 "devices. Cache flush bypassed!\n");
268 } else if (f->filetype == FIO_TYPE_CHAR || f->filetype == FIO_TYPE_PIPE)
272 td_verror(td, errno, "invalidate_cache");
274 } else if (ret > 0) {
275 td_verror(td, ret, "invalidate_cache");
283 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
285 if (!(f->flags & FIO_FILE_OPEN))
288 return __file_invalidate_cache(td, f, -1, -1);
291 int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
295 dprint(FD_FILE, "fd close %s\n", f->file_name);
299 if (close(f->fd) < 0)
306 static int file_lookup_open(struct fio_file *f, int flags)
308 struct fio_file *__f;
311 __f = lookup_file_hash(f->file_name);
313 dprint(FD_FILE, "found file in hash %s\n", f->file_name);
315 * racy, need the __f->lock locked
318 f->lock_owner = __f->lock_owner;
319 f->lock_batch = __f->lock_batch;
320 f->lock_ddir = __f->lock_ddir;
323 dprint(FD_FILE, "file not found in hash %s\n", f->file_name);
327 f->fd = open(f->file_name, flags, 0600);
331 int generic_open_file(struct thread_data *td, struct fio_file *f)
337 dprint(FD_FILE, "fd open %s\n", f->file_name);
339 if (!strcmp(f->file_name, "-")) {
341 log_err("fio: can't read/write to stdin/out\n");
347 * move output logging to stderr, if we are writing to stdout
354 flags |= OS_O_DIRECT;
357 if (f->filetype != FIO_TYPE_FILE)
358 flags |= FIO_O_NOATIME;
359 if (td->o.create_on_open)
367 if (f->filetype == FIO_TYPE_FILE)
371 f->fd = dup(STDOUT_FILENO);
373 from_hash = file_lookup_open(f, flags);
375 if (f->filetype == FIO_TYPE_CHAR && !read_only)
381 f->fd = dup(STDIN_FILENO);
383 from_hash = file_lookup_open(f, flags);
387 char buf[FIO_VERROR_SIZE];
390 if (errno == EPERM && (flags & FIO_O_NOATIME)) {
391 flags &= ~FIO_O_NOATIME;
395 snprintf(buf, sizeof(buf) - 1, "open(%s)", f->file_name);
397 td_verror(td, __e, buf);
400 if (!from_hash && f->fd != -1) {
401 if (add_file_hash(f)) {
405 * OK to ignore, we haven't done anything with it
407 ret = generic_close_file(td, f);
415 int generic_get_file_size(struct thread_data *td, struct fio_file *f)
417 return get_file_size(td, f);
421 * open/close all files, so that ->real_file_size gets set
423 static int get_file_sizes(struct thread_data *td)
429 for_each_file(td, f, i) {
430 dprint(FD_FILE, "get file size for %p/%d/%p\n", f, i,
433 if (td_io_get_file_size(td, f)) {
434 if (td->error != ENOENT) {
435 log_err("%s\n", td->verror);
441 if (f->real_file_size == -1ULL && td->o.size)
442 f->real_file_size = td->o.size / td->o.nr_files;
449 * Open the files and setup files sizes, creating files if necessary.
451 int setup_files(struct thread_data *td)
453 unsigned long long total_size, extend_size;
456 int err = 0, need_extend;
458 dprint(FD_FILE, "setup files\n");
460 if (td->o.read_iolog_file)
464 * if ioengine defines a setup() method, it's responsible for
465 * opening the files and setting f->real_file_size to indicate
466 * the valid range for that file.
468 if (td->io_ops->setup)
469 err = td->io_ops->setup(td);
471 err = get_file_sizes(td);
477 * check sizes. if the files/devices do not exist and the size
478 * isn't passed to fio, abort.
481 for_each_file(td, f, i) {
482 if (f->real_file_size == -1ULL)
485 total_size += f->real_file_size;
489 * device/file sizes are zero and no size given, punt
491 if ((!total_size || total_size == -1ULL) && !td->o.size &&
492 !(td->io_ops->flags & FIO_NOIO) && !td->o.fill_device) {
493 log_err("%s: you need to specify size=\n", td->o.name);
494 td_verror(td, EINVAL, "total_file_size");
499 * now file sizes are known, so we can set ->io_size. if size= is
500 * not given, ->io_size is just equal to ->real_file_size. if size
501 * is given, ->io_size is size / nr_files.
503 extend_size = total_size = 0;
505 for_each_file(td, f, i) {
506 f->file_offset = td->o.start_offset;
508 if (!td->o.file_size_low) {
510 * no file size range given, file size is equal to
511 * total size divided by number of files. if that is
512 * zero, set it to the real file size.
514 f->io_size = td->o.size / td->o.nr_files;
516 f->io_size = f->real_file_size - f->file_offset;
517 } else if (f->real_file_size < td->o.file_size_low ||
518 f->real_file_size > td->o.file_size_high) {
519 if (f->file_offset > td->o.file_size_low)
522 * file size given. if it's fixed, use that. if it's a
523 * range, generate a random size in-between.
525 if (td->o.file_size_low == td->o.file_size_high) {
526 f->io_size = td->o.file_size_low
529 f->io_size = get_rand_file_size(td)
533 f->io_size = f->real_file_size - f->file_offset;
535 if (f->io_size == -1ULL)
538 total_size += f->io_size;
540 if (f->filetype == FIO_TYPE_FILE &&
541 (f->io_size + f->file_offset) > f->real_file_size &&
542 !(td->io_ops->flags & FIO_DISKLESSIO)) {
543 if (!td->o.create_on_open) {
545 extend_size += (f->io_size + f->file_offset);
547 f->real_file_size = f->io_size + f->file_offset;
548 f->flags |= FIO_FILE_EXTEND;
552 if (!td->o.size || td->o.size > total_size)
553 td->o.size = total_size;
556 * See if we need to extend some files
561 log_info("%s: Laying out IO file(s) (%u file(s) /"
562 " %LuMiB)\n", td->o.name, need_extend,
565 for_each_file(td, f, i) {
566 unsigned long long old_len, extend_len;
568 if (!(f->flags & FIO_FILE_EXTEND))
571 assert(f->filetype == FIO_TYPE_FILE);
572 f->flags &= ~FIO_FILE_EXTEND;
573 old_len = f->real_file_size;
574 extend_len = f->io_size + f->file_offset - old_len;
575 f->real_file_size = (f->io_size + f->file_offset);
576 err = extend_file(td, f);
580 err = __file_invalidate_cache(td, f, old_len,
593 if (!td->o.zone_size)
594 td->o.zone_size = td->o.size;
597 * iolog already set the total io size, if we read back
600 if (!td->o.read_iolog_file)
601 td->total_io_size = td->o.size * td->o.loops;
604 log_err("%s: you need to specify valid offset=\n", td->o.name);
608 int pre_read_files(struct thread_data *td)
613 dprint(FD_FILE, "pre_read files\n");
615 for_each_file(td, f, i) {
616 pre_read_file(td, f);
622 int init_random_map(struct thread_data *td)
624 unsigned long long blocks, num_maps;
628 if (td->o.norandommap || !td_random(td))
631 for_each_file(td, f, i) {
632 blocks = (f->real_file_size + td->o.rw_min_bs - 1) /
633 (unsigned long long) td->o.rw_min_bs;
634 num_maps = (blocks + BLOCKS_PER_MAP - 1) /
635 (unsigned long long) BLOCKS_PER_MAP;
636 f->file_map = smalloc(num_maps * sizeof(int));
638 f->num_maps = num_maps;
641 if (!td->o.softrandommap) {
642 log_err("fio: failed allocating random map. If running"
643 " a large number of jobs, try the 'norandommap'"
644 " option or set 'softrandommap'. Or give"
645 " a larger --alloc-size to fio.\n");
649 log_info("fio: file %s failed allocating random map. Running "
650 "job without.\n", f->file_name);
657 void close_files(struct thread_data *td)
662 for_each_file(td, f, i)
663 td_io_close_file(td, f);
666 void close_and_free_files(struct thread_data *td)
671 dprint(FD_FILE, "close files\n");
673 for_each_file(td, f, i) {
674 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
675 dprint(FD_FILE, "free unlink %s\n", f->file_name);
676 unlink(f->file_name);
679 td_io_close_file(td, f);
692 td->o.filename = NULL;
699 static void get_file_type(struct fio_file *f)
703 if (!strcmp(f->file_name, "-"))
704 f->filetype = FIO_TYPE_PIPE;
706 f->filetype = FIO_TYPE_FILE;
708 if (!lstat(f->file_name, &sb)) {
709 if (S_ISBLK(sb.st_mode))
710 f->filetype = FIO_TYPE_BD;
711 else if (S_ISCHR(sb.st_mode))
712 f->filetype = FIO_TYPE_CHAR;
713 else if (S_ISFIFO(sb.st_mode))
714 f->filetype = FIO_TYPE_PIPE;
718 int add_file(struct thread_data *td, const char *fname)
720 int cur_files = td->files_index;
721 char file_name[PATH_MAX];
725 dprint(FD_FILE, "add file %s\n", fname);
727 f = smalloc(sizeof(*f));
729 log_err("fio: smalloc OOM\n");
735 if (td->files_size <= td->files_index) {
736 int new_size = td->o.nr_files + 1;
738 dprint(FD_FILE, "resize file array to %d files\n", new_size);
740 td->files = realloc(td->files, new_size * sizeof(f));
741 td->files_size = new_size;
743 td->files[cur_files] = f;
746 * init function, io engine may not be loaded yet
748 if (td->io_ops && (td->io_ops->flags & FIO_DISKLESSIO))
749 f->real_file_size = -1ULL;
752 len = sprintf(file_name, "%s/", td->o.directory);
754 sprintf(file_name + len, "%s", fname);
755 f->file_name = smalloc_strdup(file_name);
757 log_err("fio: smalloc OOM\n");
763 switch (td->o.file_lock_mode) {
766 case FILE_LOCK_READWRITE:
767 f->lock = fio_mutex_rw_init();
769 case FILE_LOCK_EXCLUSIVE:
770 f->lock = fio_mutex_init(1);
773 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
778 if (f->filetype == FIO_TYPE_FILE)
779 td->nr_normal_files++;
781 dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name,
787 void get_file(struct fio_file *f)
789 dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
790 assert(f->flags & FIO_FILE_OPEN);
794 int put_file(struct thread_data *td, struct fio_file *f)
796 int f_ret = 0, ret = 0;
798 dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
800 if (!(f->flags & FIO_FILE_OPEN))
803 assert(f->references);
807 if (should_fsync(td) && td->o.fsync_on_close)
808 f_ret = fsync(f->fd);
810 if (td->io_ops->close_file)
811 ret = td->io_ops->close_file(td, f);
817 f->flags &= ~FIO_FILE_OPEN;
821 void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
823 if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
826 if (f->lock_owner == td && f->lock_batch--)
829 if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
830 if (ddir == DDIR_READ)
831 fio_mutex_down_read(f->lock);
833 fio_mutex_down_write(f->lock);
834 } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
835 fio_mutex_down(f->lock);
838 f->lock_batch = td->o.lockfile_batch;
842 void unlock_file(struct thread_data *td, struct fio_file *f)
844 if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
849 if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
850 const int is_read = f->lock_ddir == DDIR_READ;
851 int val = fio_mutex_getval(f->lock);
853 if ((is_read && val == 1) || (!is_read && val == -1))
854 f->lock_owner = NULL;
857 fio_mutex_up_read(f->lock);
859 fio_mutex_up_write(f->lock);
860 } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE) {
861 int val = fio_mutex_getval(f->lock);
864 f->lock_owner = NULL;
866 fio_mutex_up(f->lock);
870 void unlock_file_all(struct thread_data *td, struct fio_file *f)
872 if (f->lock_owner != td)
879 static int recurse_dir(struct thread_data *td, const char *dirname)
885 D = opendir(dirname);
887 char buf[FIO_VERROR_SIZE];
889 snprintf(buf, FIO_VERROR_SIZE - 1, "opendir(%s)", dirname);
890 td_verror(td, errno, buf);
894 while ((dir = readdir(D)) != NULL) {
895 char full_path[PATH_MAX];
898 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
901 sprintf(full_path, "%s/%s", dirname, dir->d_name);
903 if (lstat(full_path, &sb) == -1) {
904 if (errno != ENOENT) {
905 td_verror(td, errno, "stat");
910 if (S_ISREG(sb.st_mode)) {
911 add_file(td, full_path);
915 if (!S_ISDIR(sb.st_mode))
918 ret = recurse_dir(td, full_path);
927 int add_dir_files(struct thread_data *td, const char *path)
929 int ret = recurse_dir(td, path);
932 log_info("fio: opendir added %d files\n", td->o.nr_files);
937 void dup_files(struct thread_data *td, struct thread_data *org)
942 dprint(FD_FILE, "dup files: %d\n", org->files_index);
947 td->files = malloc(org->files_index * sizeof(f));
949 for_each_file(org, f, i) {
950 struct fio_file *__f;
952 __f = smalloc(sizeof(*__f));
954 log_err("fio: smalloc OOM\n");
959 __f->file_name = smalloc_strdup(f->file_name);
960 if (!__f->file_name) {
961 log_err("fio: smalloc OOM\n");
965 __f->filetype = f->filetype;
973 * Returns the index that matches the filename, or -1 if not there
975 int get_fileno(struct thread_data *td, const char *fname)
980 for_each_file(td, f, i)
981 if (!strcmp(f->file_name, fname))
988 * For log usage, where we add/open/close files automatically
990 void free_release_files(struct thread_data *td)
994 td->nr_normal_files = 0;