16 static int extend_file(struct thread_data *td, struct fio_file *f)
18 int r, new_layout = 0, unlink_file = 0, flags;
19 unsigned long long left;
24 log_err("fio: refusing extend of file due to read-only\n");
29 * check if we need to lay the file out complete again. fio
30 * does that for operations involving reads, or for writes
31 * where overwrite is set
33 if (td_read(td) || (td_write(td) && td->o.overwrite))
35 if (td_write(td) && !td->o.overwrite)
38 if (unlink_file || new_layout) {
39 if ((unlink(f->file_name) < 0) && (errno != ENOENT)) {
40 td_verror(td, errno, "unlink");
45 flags = O_WRONLY | O_CREAT;
49 dprint(FD_FILE, "open file %s, flags %x\n", f->file_name, flags);
50 f->fd = open(f->file_name, flags, 0644);
52 td_verror(td, errno, "open");
59 dprint(FD_FILE, "truncate file %s, size %llu\n", f->file_name,
61 if (ftruncate(f->fd, f->real_file_size) == -1) {
62 td_verror(td, errno, "ftruncate");
66 dprint(FD_FILE, "fallocate file %s, size %llu\n", f->file_name,
68 if (posix_fallocate(f->fd, 0, f->real_file_size) < 0) {
69 td_verror(td, errno, "posix_fallocate");
73 b = malloc(td->o.max_bs[DDIR_WRITE]);
74 memset(b, 0, td->o.max_bs[DDIR_WRITE]);
76 left = f->real_file_size;
77 while (left && !td->terminate) {
78 bs = td->o.max_bs[DDIR_WRITE];
82 r = write(f->fd, b, bs);
89 td_verror(td, errno, "write");
91 td_verror(td, EIO, "write");
99 else if (td->o.create_fsync) {
100 if (fsync(f->fd) < 0) {
101 td_verror(td, errno, "fsync");
117 static unsigned long long get_rand_file_size(struct thread_data *td)
119 unsigned long long ret;
122 r = os_random_long(&td->file_size_state);
123 ret = td->o.file_size_low + (unsigned long long) ((double) (td->o.file_size_high - td->o.file_size_low) * (r / (RAND_MAX + 1.0)));
124 ret -= (ret % td->o.rw_min_bs);
128 static int file_size(struct thread_data *td, struct fio_file *f)
132 if (fstat(f->fd, &st) == -1) {
133 td_verror(td, errno, "fstat");
137 f->real_file_size = st.st_size;
141 static int bdev_size(struct thread_data *td, struct fio_file *f)
143 unsigned long long bytes;
146 r = blockdev_size(f->fd, &bytes);
148 td_verror(td, r, "blockdev_size");
152 f->real_file_size = bytes;
156 static int get_file_size(struct thread_data *td, struct fio_file *f)
160 if (f->flags & FIO_SIZE_KNOWN)
163 if (f->filetype == FIO_TYPE_FILE)
164 ret = file_size(td, f);
165 else if (f->filetype == FIO_TYPE_BD)
166 ret = bdev_size(td, f);
168 f->real_file_size = -1;
173 if (f->file_offset > f->real_file_size) {
174 log_err("%s: offset extends end (%Lu > %Lu)\n", td->o.name, f->file_offset, f->real_file_size);
178 f->flags |= FIO_SIZE_KNOWN;
182 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
186 dprint(FD_IO, "invalidate cache (%d)\n", td->o.odirect);
192 * FIXME: add blockdev flushing too
195 ret = madvise(f->mmap, f->io_size, MADV_DONTNEED);
196 else if (f->filetype == FIO_TYPE_FILE)
197 ret = fadvise(f->fd, f->file_offset, f->io_size, POSIX_FADV_DONTNEED);
198 else if (f->filetype == FIO_TYPE_BD) {
199 ret = blockdev_invalidate_cache(f->fd);
200 if (ret < 0 && errno == EACCES && geteuid()) {
202 log_err("fio: only root may flush block devices. Cache flush bypassed!\n");
207 } else if (f->filetype == FIO_TYPE_CHAR || f->filetype == FIO_TYPE_PIPE)
211 td_verror(td, errno, "invalidate_cache");
218 int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
222 dprint(FD_FILE, "fd close %s\n", f->file_name);
226 if (close(f->fd) < 0)
233 static int file_lookup_open(struct fio_file *f, int flags)
235 struct fio_file *__f;
238 __f = lookup_file_hash(f->file_name);
240 dprint(FD_FILE, "found file in hash %s\n", f->file_name);
242 * racy, need the __f->lock locked
245 f->lock_owner = __f->lock_owner;
246 f->lock_batch = __f->lock_batch;
247 f->lock_ddir = __f->lock_ddir;
250 dprint(FD_FILE, "file not found in hash %s\n", f->file_name);
254 f->fd = open(f->file_name, flags, 0600);
258 int generic_open_file(struct thread_data *td, struct fio_file *f)
264 dprint(FD_FILE, "fd open %s\n", f->file_name);
266 if (!strcmp(f->file_name, "-")) {
268 log_err("fio: can't read/write to stdin/out\n");
274 * move output logging to stderr, if we are writing to stdout
281 flags |= OS_O_DIRECT;
284 if (f->filetype != FIO_TYPE_FILE)
293 if (f->filetype == FIO_TYPE_FILE)
297 f->fd = dup(STDOUT_FILENO);
299 from_hash = file_lookup_open(f, flags);
301 if (f->filetype == FIO_TYPE_CHAR && !read_only)
307 f->fd = dup(STDIN_FILENO);
309 from_hash = file_lookup_open(f, flags);
313 char buf[FIO_VERROR_SIZE];
316 if (errno == EPERM && (flags & O_NOATIME)) {
321 snprintf(buf, sizeof(buf) - 1, "open(%s)", f->file_name);
323 td_verror(td, __e, buf);
326 if (get_file_size(td, f))
329 if (!from_hash && f->fd != -1) {
330 if (add_file_hash(f)) {
334 * OK to ignore, we haven't done anything with it
336 ret = generic_close_file(td, f);
347 int open_files(struct thread_data *td)
353 dprint(FD_FILE, "open files\n");
355 for_each_file(td, f, i) {
356 err = td_io_open_file(td, f);
358 if (td->error == EMFILE) {
359 log_err("fio: limited open files to: %d\n", td->nr_open_files);
360 td->o.open_files = td->nr_open_files;
367 if (td->o.open_files == td->nr_open_files)
374 for_each_file(td, f, i)
375 td_io_close_file(td, f);
381 * open/close all files, so that ->real_file_size gets set
383 static int get_file_sizes(struct thread_data *td)
389 for_each_file(td, f, i) {
390 dprint(FD_FILE, "get file size for %p/%d/%p\n", f, i, f->file_name);
392 if (td->io_ops->open_file(td, f)) {
393 if (td->error != ENOENT) {
394 log_err("%s\n", td->verror);
399 if (td->io_ops->close_file)
400 td->io_ops->close_file(td, f);
403 if (f->real_file_size == -1ULL && td->o.size)
404 f->real_file_size = td->o.size / td->o.nr_files;
411 * Open the files and setup files sizes, creating files if necessary.
413 int setup_files(struct thread_data *td)
415 unsigned long long total_size, extend_size;
418 int err = 0, need_extend;
420 dprint(FD_FILE, "setup files\n");
423 * if ioengine defines a setup() method, it's responsible for
424 * opening the files and setting f->real_file_size to indicate
425 * the valid range for that file.
427 if (td->io_ops->setup)
428 err = td->io_ops->setup(td);
430 err = get_file_sizes(td);
436 * check sizes. if the files/devices do not exist and the size
437 * isn't passed to fio, abort.
440 for_each_file(td, f, i) {
441 if (f->real_file_size == -1ULL)
444 total_size += f->real_file_size;
448 * device/file sizes are zero and no size given, punt
450 if ((!total_size || total_size == -1ULL) && !td->o.size &&
451 !(td->io_ops->flags & FIO_NOIO) && !td->o.fill_device) {
452 log_err("%s: you need to specify size=\n", td->o.name);
453 td_verror(td, EINVAL, "total_file_size");
458 * now file sizes are known, so we can set ->io_size. if size= is
459 * not given, ->io_size is just equal to ->real_file_size. if size
460 * is given, ->io_size is size / nr_files.
462 extend_size = total_size = 0;
464 for_each_file(td, f, i) {
465 f->file_offset = td->o.start_offset;
467 if (!td->o.file_size_low) {
469 * no file size range given, file size is equal to
470 * total size divided by number of files. if that is
471 * zero, set it to the real file size.
473 f->io_size = td->o.size / td->o.nr_files;
475 f->io_size = f->real_file_size - f->file_offset;
476 } else if (f->real_file_size < td->o.file_size_low ||
477 f->real_file_size > td->o.file_size_high) {
478 if (f->file_offset > td->o.file_size_low)
481 * file size given. if it's fixed, use that. if it's a
482 * range, generate a random size in-between.
484 if (td->o.file_size_low == td->o.file_size_high)
485 f->io_size = td->o.file_size_low - f->file_offset;
487 f->io_size = get_rand_file_size(td) - f->file_offset;
489 f->io_size = f->real_file_size - f->file_offset;
491 if (f->io_size == -1ULL)
494 total_size += f->io_size;
496 if (f->filetype == FIO_TYPE_FILE &&
497 (f->io_size + f->file_offset) > f->real_file_size &&
498 !(td->io_ops->flags & FIO_DISKLESSIO)) {
500 extend_size += (f->io_size + f->file_offset);
501 f->flags |= FIO_FILE_EXTEND;
505 if (!td->o.size || td->o.size > total_size)
506 td->o.size = total_size;
509 * See if we need to extend some files
513 log_info("%s: Laying out IO file(s) (%u file(s) / %LuMiB)\n",
514 td->o.name, need_extend, extend_size >> 20);
516 for_each_file(td, f, i) {
517 if (!(f->flags & FIO_FILE_EXTEND))
520 assert(f->filetype == FIO_TYPE_FILE);
521 f->flags &= ~FIO_FILE_EXTEND;
522 f->real_file_size = (f->io_size + f->file_offset);
523 err = extend_file(td, f);
533 if (!td->o.zone_size)
534 td->o.zone_size = td->o.size;
537 * iolog already set the total io size, if we read back
540 if (!td->o.read_iolog_file)
541 td->total_io_size = td->o.size * td->o.loops;
544 log_err("%s: you need to specify valid offset=\n", td->o.name);
548 int init_random_map(struct thread_data *td)
550 unsigned long long blocks, num_maps;
554 if (td->o.norandommap || !td_random(td))
557 for_each_file(td, f, i) {
558 blocks = (f->real_file_size + td->o.rw_min_bs - 1) / (unsigned long long) td->o.rw_min_bs;
559 num_maps = (blocks + BLOCKS_PER_MAP-1)/ (unsigned long long) BLOCKS_PER_MAP;
560 f->file_map = smalloc(num_maps * sizeof(long));
562 log_err("fio: failed allocating random map. If running a large number of jobs, try the 'norandommap' option\n");
565 f->num_maps = num_maps;
571 void close_files(struct thread_data *td)
576 for_each_file(td, f, i)
577 td_io_close_file(td, f);
580 void close_and_free_files(struct thread_data *td)
585 dprint(FD_FILE, "close files\n");
587 for_each_file(td, f, i) {
588 if (td->o.unlink && f->filetype == FIO_TYPE_FILE)
589 unlink(f->file_name);
591 td_io_close_file(td, f);
603 td->o.filename = NULL;
610 static void get_file_type(struct fio_file *f)
614 if (!strcmp(f->file_name, "-"))
615 f->filetype = FIO_TYPE_PIPE;
617 f->filetype = FIO_TYPE_FILE;
619 if (!lstat(f->file_name, &sb)) {
620 if (S_ISBLK(sb.st_mode))
621 f->filetype = FIO_TYPE_BD;
622 else if (S_ISCHR(sb.st_mode))
623 f->filetype = FIO_TYPE_CHAR;
624 else if (S_ISFIFO(sb.st_mode))
625 f->filetype = FIO_TYPE_PIPE;
629 int add_file(struct thread_data *td, const char *fname)
631 int cur_files = td->files_index;
632 char file_name[PATH_MAX];
636 dprint(FD_FILE, "add file %s\n", fname);
638 f = smalloc(sizeof(*f));
641 dprint(FD_FILE, "resize file array to %d files\n", cur_files + 1);
643 td->files = realloc(td->files, (cur_files + 1) * sizeof(f));
644 td->files[cur_files] = f;
647 * init function, io engine may not be loaded yet
649 if (td->io_ops && (td->io_ops->flags & FIO_DISKLESSIO))
650 f->real_file_size = -1ULL;
653 len = sprintf(file_name, "%s/", td->o.directory);
655 sprintf(file_name + len, "%s", fname);
656 f->file_name = smalloc_strdup(file_name);
660 switch (td->o.file_lock_mode) {
663 case FILE_LOCK_READWRITE:
664 f->lock = fio_mutex_rw_init();
666 case FILE_LOCK_EXCLUSIVE:
667 f->lock = fio_mutex_init(1);
670 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
675 if (f->filetype == FIO_TYPE_FILE)
676 td->nr_normal_files++;
678 dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name, cur_files);
683 void get_file(struct fio_file *f)
685 dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
686 assert(f->flags & FIO_FILE_OPEN);
690 int put_file(struct thread_data *td, struct fio_file *f)
692 int f_ret = 0, ret = 0;
694 dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
696 if (!(f->flags & FIO_FILE_OPEN))
699 assert(f->references);
703 if (should_fsync(td) && td->o.fsync_on_close)
704 f_ret = fsync(f->fd);
706 if (td->io_ops->close_file)
707 ret = td->io_ops->close_file(td, f);
713 f->flags &= ~FIO_FILE_OPEN;
717 void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
719 if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
722 if (f->lock_owner == td && f->lock_batch--)
725 if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
726 if (ddir == DDIR_READ)
727 fio_mutex_down_read(f->lock);
729 fio_mutex_down_write(f->lock);
730 } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
731 fio_mutex_down(f->lock);
734 f->lock_batch = td->o.lockfile_batch;
738 void unlock_file(struct thread_data *td, struct fio_file *f)
740 if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
745 if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
746 const int is_read = f->lock_ddir == DDIR_READ;
747 int val = fio_mutex_getval(f->lock);
749 if ((is_read && val == 1) || (!is_read && val == -1))
750 f->lock_owner = NULL;
753 fio_mutex_up_read(f->lock);
755 fio_mutex_up_write(f->lock);
756 } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE) {
757 int val = fio_mutex_getval(f->lock);
760 f->lock_owner = NULL;
762 fio_mutex_up(f->lock);
766 void unlock_file_all(struct thread_data *td, struct fio_file *f)
768 if (f->lock_owner != td)
775 static int recurse_dir(struct thread_data *td, const char *dirname)
781 D = opendir(dirname);
783 char buf[FIO_VERROR_SIZE];
785 snprintf(buf, FIO_VERROR_SIZE - 1, "opendir(%s)", dirname);
786 td_verror(td, errno, buf);
790 while ((dir = readdir(D)) != NULL) {
791 char full_path[PATH_MAX];
794 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
797 sprintf(full_path, "%s/%s", dirname, dir->d_name);
799 if (lstat(full_path, &sb) == -1) {
800 if (errno != ENOENT) {
801 td_verror(td, errno, "stat");
806 if (S_ISREG(sb.st_mode)) {
807 add_file(td, full_path);
811 if (!S_ISDIR(sb.st_mode))
814 if ((ret = recurse_dir(td, full_path)) != 0)
822 int add_dir_files(struct thread_data *td, const char *path)
824 int ret = recurse_dir(td, path);
827 log_info("fio: opendir added %d files\n", td->o.nr_files);
832 void dup_files(struct thread_data *td, struct thread_data *org)
837 dprint(FD_FILE, "dup files: %d\n", org->files_index);
842 td->files = malloc(org->files_index * sizeof(f));
844 for_each_file(org, f, i) {
845 struct fio_file *__f;
847 __f = smalloc(sizeof(*__f));
850 __f->file_name = smalloc_strdup(f->file_name);
857 * Returns the index that matches the filename, or -1 if not there
859 int get_fileno(struct thread_data *td, const char *fname)
864 for_each_file(td, f, i)
865 if (!strcmp(f->file_name, fname))
872 * For log usage, where we add/open/close files automatically
874 void free_release_files(struct thread_data *td)
878 td->nr_normal_files = 0;