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, size_d;
122 r = os_random_long(&td->file_size_state);
123 size_d = td->o.file_size_high - td->o.file_size_low;
124 ret = (unsigned long long) ((double) size_d * (r / (RAND_MAX + 1.0)));
125 ret += td->o.file_size_low;
126 ret -= (ret % td->o.rw_min_bs);
130 static int file_size(struct thread_data *td, struct fio_file *f)
134 if (fstat(f->fd, &st) == -1) {
135 td_verror(td, errno, "fstat");
139 f->real_file_size = st.st_size;
143 static int bdev_size(struct thread_data *td, struct fio_file *f)
145 unsigned long long bytes;
148 r = blockdev_size(f->fd, &bytes);
150 td_verror(td, r, "blockdev_size");
154 f->real_file_size = bytes;
158 static int get_file_size(struct thread_data *td, struct fio_file *f)
162 if (f->flags & FIO_SIZE_KNOWN)
165 if (f->filetype == FIO_TYPE_FILE)
166 ret = file_size(td, f);
167 else if (f->filetype == FIO_TYPE_BD)
168 ret = bdev_size(td, f);
170 f->real_file_size = -1;
175 if (f->file_offset > f->real_file_size) {
176 log_err("%s: offset extends end (%Lu > %Lu)\n", td->o.name,
177 f->file_offset, f->real_file_size);
181 f->flags |= FIO_SIZE_KNOWN;
185 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
189 dprint(FD_IO, "invalidate cache (%d)\n", td->o.odirect);
195 * FIXME: add blockdev flushing too
198 ret = madvise(f->mmap, f->io_size, MADV_DONTNEED);
199 else if (f->filetype == FIO_TYPE_FILE) {
200 ret = fadvise(f->fd, f->file_offset, f->io_size,
201 POSIX_FADV_DONTNEED);
202 } else if (f->filetype == FIO_TYPE_BD) {
203 ret = blockdev_invalidate_cache(f->fd);
204 if (ret < 0 && errno == EACCES && geteuid()) {
206 log_err("fio: only root may flush block "
207 "devices. Cache flush bypassed!\n");
212 } else if (f->filetype == FIO_TYPE_CHAR || f->filetype == FIO_TYPE_PIPE)
216 td_verror(td, errno, "invalidate_cache");
223 int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
227 dprint(FD_FILE, "fd close %s\n", f->file_name);
231 if (close(f->fd) < 0)
238 static int file_lookup_open(struct fio_file *f, int flags)
240 struct fio_file *__f;
243 __f = lookup_file_hash(f->file_name);
245 dprint(FD_FILE, "found file in hash %s\n", f->file_name);
247 * racy, need the __f->lock locked
250 f->lock_owner = __f->lock_owner;
251 f->lock_batch = __f->lock_batch;
252 f->lock_ddir = __f->lock_ddir;
255 dprint(FD_FILE, "file not found in hash %s\n", f->file_name);
259 f->fd = open(f->file_name, flags, 0600);
263 int generic_open_file(struct thread_data *td, struct fio_file *f)
269 dprint(FD_FILE, "fd open %s\n", f->file_name);
271 if (!strcmp(f->file_name, "-")) {
273 log_err("fio: can't read/write to stdin/out\n");
279 * move output logging to stderr, if we are writing to stdout
286 flags |= OS_O_DIRECT;
289 if (f->filetype != FIO_TYPE_FILE)
298 if (f->filetype == FIO_TYPE_FILE)
302 f->fd = dup(STDOUT_FILENO);
304 from_hash = file_lookup_open(f, flags);
306 if (f->filetype == FIO_TYPE_CHAR && !read_only)
312 f->fd = dup(STDIN_FILENO);
314 from_hash = file_lookup_open(f, flags);
318 char buf[FIO_VERROR_SIZE];
321 if (errno == EPERM && (flags & O_NOATIME)) {
326 snprintf(buf, sizeof(buf) - 1, "open(%s)", f->file_name);
328 td_verror(td, __e, buf);
331 if (get_file_size(td, f))
334 if (!from_hash && f->fd != -1) {
335 if (add_file_hash(f)) {
339 * OK to ignore, we haven't done anything with it
341 ret = generic_close_file(td, f);
352 int open_files(struct thread_data *td)
358 dprint(FD_FILE, "open files\n");
360 for_each_file(td, f, i) {
361 err = td_io_open_file(td, f);
363 if (td->error == EMFILE) {
364 log_err("fio: limited open files to: %d\n",
366 td->o.open_files = td->nr_open_files;
373 if (td->o.open_files == td->nr_open_files)
380 for_each_file(td, f, i)
381 td_io_close_file(td, f);
387 * open/close all files, so that ->real_file_size gets set
389 static int get_file_sizes(struct thread_data *td)
395 for_each_file(td, f, i) {
396 dprint(FD_FILE, "get file size for %p/%d/%p\n", f, i,
399 if (td->io_ops->open_file(td, f)) {
400 if (td->error != ENOENT) {
401 log_err("%s\n", td->verror);
406 if (td->io_ops->close_file)
407 td->io_ops->close_file(td, f);
410 if (f->real_file_size == -1ULL && td->o.size)
411 f->real_file_size = td->o.size / td->o.nr_files;
418 * Open the files and setup files sizes, creating files if necessary.
420 int setup_files(struct thread_data *td)
422 unsigned long long total_size, extend_size;
425 int err = 0, need_extend;
427 dprint(FD_FILE, "setup files\n");
430 * if ioengine defines a setup() method, it's responsible for
431 * opening the files and setting f->real_file_size to indicate
432 * the valid range for that file.
434 if (td->io_ops->setup)
435 err = td->io_ops->setup(td);
437 err = get_file_sizes(td);
443 * check sizes. if the files/devices do not exist and the size
444 * isn't passed to fio, abort.
447 for_each_file(td, f, i) {
448 if (f->real_file_size == -1ULL)
451 total_size += f->real_file_size;
455 * device/file sizes are zero and no size given, punt
457 if ((!total_size || total_size == -1ULL) && !td->o.size &&
458 !(td->io_ops->flags & FIO_NOIO) && !td->o.fill_device) {
459 log_err("%s: you need to specify size=\n", td->o.name);
460 td_verror(td, EINVAL, "total_file_size");
465 * now file sizes are known, so we can set ->io_size. if size= is
466 * not given, ->io_size is just equal to ->real_file_size. if size
467 * is given, ->io_size is size / nr_files.
469 extend_size = total_size = 0;
471 for_each_file(td, f, i) {
472 f->file_offset = td->o.start_offset;
474 if (!td->o.file_size_low) {
476 * no file size range given, file size is equal to
477 * total size divided by number of files. if that is
478 * zero, set it to the real file size.
480 f->io_size = td->o.size / td->o.nr_files;
482 f->io_size = f->real_file_size - f->file_offset;
483 } else if (f->real_file_size < td->o.file_size_low ||
484 f->real_file_size > td->o.file_size_high) {
485 if (f->file_offset > td->o.file_size_low)
488 * file size given. if it's fixed, use that. if it's a
489 * range, generate a random size in-between.
491 if (td->o.file_size_low == td->o.file_size_high) {
492 f->io_size = td->o.file_size_low
495 f->io_size = get_rand_file_size(td)
499 f->io_size = f->real_file_size - f->file_offset;
501 if (f->io_size == -1ULL)
504 total_size += f->io_size;
506 if (f->filetype == FIO_TYPE_FILE &&
507 (f->io_size + f->file_offset) > f->real_file_size &&
508 !(td->io_ops->flags & FIO_DISKLESSIO)) {
510 extend_size += (f->io_size + f->file_offset);
511 f->flags |= FIO_FILE_EXTEND;
515 if (!td->o.size || td->o.size > total_size)
516 td->o.size = total_size;
519 * See if we need to extend some files
523 log_info("%s: Laying out IO file(s) (%u file(s) / %LuMiB)\n",
524 td->o.name, need_extend, extend_size >> 20);
526 for_each_file(td, f, i) {
527 if (!(f->flags & FIO_FILE_EXTEND))
530 assert(f->filetype == FIO_TYPE_FILE);
531 f->flags &= ~FIO_FILE_EXTEND;
532 f->real_file_size = (f->io_size + f->file_offset);
533 err = extend_file(td, f);
543 if (!td->o.zone_size)
544 td->o.zone_size = td->o.size;
547 * iolog already set the total io size, if we read back
550 if (!td->o.read_iolog_file)
551 td->total_io_size = td->o.size * td->o.loops;
554 log_err("%s: you need to specify valid offset=\n", td->o.name);
558 int init_random_map(struct thread_data *td)
560 unsigned long long blocks, num_maps;
564 if (td->o.norandommap || !td_random(td))
567 for_each_file(td, f, i) {
568 blocks = (f->real_file_size + td->o.rw_min_bs - 1) /
569 (unsigned long long) td->o.rw_min_bs;
570 num_maps = (blocks + BLOCKS_PER_MAP - 1) /
571 (unsigned long long) BLOCKS_PER_MAP;
572 f->file_map = smalloc(num_maps * sizeof(long));
574 log_err("fio: failed allocating random map. If running"
575 " a large number of jobs, try the 'norandommap'"
579 f->num_maps = num_maps;
585 void close_files(struct thread_data *td)
590 for_each_file(td, f, i)
591 td_io_close_file(td, f);
594 void close_and_free_files(struct thread_data *td)
599 dprint(FD_FILE, "close files\n");
601 for_each_file(td, f, i) {
602 if (td->o.unlink && f->filetype == FIO_TYPE_FILE)
603 unlink(f->file_name);
605 td_io_close_file(td, f);
617 td->o.filename = NULL;
624 static void get_file_type(struct fio_file *f)
628 if (!strcmp(f->file_name, "-"))
629 f->filetype = FIO_TYPE_PIPE;
631 f->filetype = FIO_TYPE_FILE;
633 if (!lstat(f->file_name, &sb)) {
634 if (S_ISBLK(sb.st_mode))
635 f->filetype = FIO_TYPE_BD;
636 else if (S_ISCHR(sb.st_mode))
637 f->filetype = FIO_TYPE_CHAR;
638 else if (S_ISFIFO(sb.st_mode))
639 f->filetype = FIO_TYPE_PIPE;
643 int add_file(struct thread_data *td, const char *fname)
645 int cur_files = td->files_index;
646 char file_name[PATH_MAX];
650 dprint(FD_FILE, "add file %s\n", fname);
652 f = smalloc(sizeof(*f));
655 dprint(FD_FILE, "resize file array to %d files\n", cur_files + 1);
657 td->files = realloc(td->files, (cur_files + 1) * sizeof(f));
658 td->files[cur_files] = f;
661 * init function, io engine may not be loaded yet
663 if (td->io_ops && (td->io_ops->flags & FIO_DISKLESSIO))
664 f->real_file_size = -1ULL;
667 len = sprintf(file_name, "%s/", td->o.directory);
669 sprintf(file_name + len, "%s", fname);
670 f->file_name = smalloc_strdup(file_name);
674 switch (td->o.file_lock_mode) {
677 case FILE_LOCK_READWRITE:
678 f->lock = fio_mutex_rw_init();
680 case FILE_LOCK_EXCLUSIVE:
681 f->lock = fio_mutex_init(1);
684 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
689 if (f->filetype == FIO_TYPE_FILE)
690 td->nr_normal_files++;
692 dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name,
698 void get_file(struct fio_file *f)
700 dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
701 assert(f->flags & FIO_FILE_OPEN);
705 int put_file(struct thread_data *td, struct fio_file *f)
707 int f_ret = 0, ret = 0;
709 dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
711 if (!(f->flags & FIO_FILE_OPEN))
714 assert(f->references);
718 if (should_fsync(td) && td->o.fsync_on_close)
719 f_ret = fsync(f->fd);
721 if (td->io_ops->close_file)
722 ret = td->io_ops->close_file(td, f);
728 f->flags &= ~FIO_FILE_OPEN;
732 void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
734 if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
737 if (f->lock_owner == td && f->lock_batch--)
740 if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
741 if (ddir == DDIR_READ)
742 fio_mutex_down_read(f->lock);
744 fio_mutex_down_write(f->lock);
745 } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
746 fio_mutex_down(f->lock);
749 f->lock_batch = td->o.lockfile_batch;
753 void unlock_file(struct thread_data *td, struct fio_file *f)
755 if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
760 if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
761 const int is_read = f->lock_ddir == DDIR_READ;
762 int val = fio_mutex_getval(f->lock);
764 if ((is_read && val == 1) || (!is_read && val == -1))
765 f->lock_owner = NULL;
768 fio_mutex_up_read(f->lock);
770 fio_mutex_up_write(f->lock);
771 } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE) {
772 int val = fio_mutex_getval(f->lock);
775 f->lock_owner = NULL;
777 fio_mutex_up(f->lock);
781 void unlock_file_all(struct thread_data *td, struct fio_file *f)
783 if (f->lock_owner != td)
790 static int recurse_dir(struct thread_data *td, const char *dirname)
796 D = opendir(dirname);
798 char buf[FIO_VERROR_SIZE];
800 snprintf(buf, FIO_VERROR_SIZE - 1, "opendir(%s)", dirname);
801 td_verror(td, errno, buf);
805 while ((dir = readdir(D)) != NULL) {
806 char full_path[PATH_MAX];
809 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
812 sprintf(full_path, "%s/%s", dirname, dir->d_name);
814 if (lstat(full_path, &sb) == -1) {
815 if (errno != ENOENT) {
816 td_verror(td, errno, "stat");
821 if (S_ISREG(sb.st_mode)) {
822 add_file(td, full_path);
826 if (!S_ISDIR(sb.st_mode))
829 ret = recurse_dir(td, full_path);
838 int add_dir_files(struct thread_data *td, const char *path)
840 int ret = recurse_dir(td, path);
843 log_info("fio: opendir added %d files\n", td->o.nr_files);
848 void dup_files(struct thread_data *td, struct thread_data *org)
853 dprint(FD_FILE, "dup files: %d\n", org->files_index);
858 td->files = malloc(org->files_index * sizeof(f));
860 for_each_file(org, f, i) {
861 struct fio_file *__f;
863 __f = smalloc(sizeof(*__f));
866 __f->file_name = smalloc_strdup(f->file_name);
873 * Returns the index that matches the filename, or -1 if not there
875 int get_fileno(struct thread_data *td, const char *fname)
880 for_each_file(td, f, i)
881 if (!strcmp(f->file_name, fname))
888 * For log usage, where we add/open/close files automatically
890 void free_release_files(struct thread_data *td)
894 td->nr_normal_files = 0;