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)
113 static unsigned long long get_rand_file_size(struct thread_data *td)
115 unsigned long long ret;
118 r = os_random_long(&td->file_size_state);
119 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)));
120 ret -= (ret % td->o.rw_min_bs);
124 static int file_size(struct thread_data *td, struct fio_file *f)
128 if (fstat(f->fd, &st) == -1) {
129 td_verror(td, errno, "fstat");
133 f->real_file_size = st.st_size;
137 static int bdev_size(struct thread_data *td, struct fio_file *f)
139 unsigned long long bytes;
142 r = blockdev_size(f->fd, &bytes);
144 td_verror(td, r, "blockdev_size");
148 f->real_file_size = bytes;
152 static int get_file_size(struct thread_data *td, struct fio_file *f)
156 if (f->flags & FIO_SIZE_KNOWN)
159 if (f->filetype == FIO_TYPE_FILE)
160 ret = file_size(td, f);
161 else if (f->filetype == FIO_TYPE_BD)
162 ret = bdev_size(td, f);
164 f->real_file_size = -1;
169 if (f->file_offset > f->real_file_size) {
170 log_err("%s: offset extends end (%Lu > %Lu)\n", td->o.name, f->file_offset, f->real_file_size);
174 f->flags |= FIO_SIZE_KNOWN;
178 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
182 dprint(FD_IO, "invalidate cache (%d)\n", td->o.odirect);
188 * FIXME: add blockdev flushing too
191 ret = madvise(f->mmap, f->io_size, MADV_DONTNEED);
192 else if (f->filetype == FIO_TYPE_FILE)
193 ret = fadvise(f->fd, f->file_offset, f->io_size, POSIX_FADV_DONTNEED);
194 else if (f->filetype == FIO_TYPE_BD) {
195 ret = blockdev_invalidate_cache(f->fd);
196 if (ret < 0 && errno == EACCES && geteuid()) {
198 log_err("fio: only root may flush block devices. Cache flush bypassed!\n");
203 } else if (f->filetype == FIO_TYPE_CHAR || f->filetype == FIO_TYPE_PIPE)
207 td_verror(td, errno, "invalidate_cache");
214 int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
218 dprint(FD_FILE, "fd close %s\n", f->file_name);
222 if (close(f->fd) < 0)
229 int generic_open_file(struct thread_data *td, struct fio_file *f)
231 struct fio_file *__f;
236 dprint(FD_FILE, "fd open %s\n", f->file_name);
238 if (!strcmp(f->file_name, "-")) {
240 log_err("fio: can't read/write to stdin/out\n");
246 * move output logging to stderr, if we are writing to stdout
253 flags |= OS_O_DIRECT;
256 if (f->filetype != FIO_TYPE_FILE)
265 if (f->filetype == FIO_TYPE_FILE)
269 f->fd = dup(STDOUT_FILENO);
271 __f = lookup_file_hash(f->file_name);
274 f->fd = dup(__f->fd);
278 f->fd = open(f->file_name, flags, 0600);
281 if (f->filetype == FIO_TYPE_CHAR && !read_only)
287 f->fd = dup(STDIN_FILENO);
289 __f = lookup_file_hash(f->file_name);
292 f->fd = dup(__f->fd);
296 f->fd = open(f->file_name, flags);
301 char buf[FIO_VERROR_SIZE];
304 if (errno == EPERM && (flags & O_NOATIME)) {
309 snprintf(buf, sizeof(buf) - 1, "open(%s)", f->file_name);
311 td_verror(td, __e, buf);
314 if (get_file_size(td, f))
317 if (!from_hash && f->fd != -1) {
318 if (add_file_hash(f)) {
322 * OK to ignore, we haven't done anything with it
324 ret = generic_close_file(td, f);
335 int open_files(struct thread_data *td)
341 dprint(FD_FILE, "open files\n");
343 for_each_file(td, f, i) {
344 err = td_io_open_file(td, f);
346 if (td->error == EMFILE) {
347 log_err("fio: limited open files to: %d\n", td->nr_open_files);
348 td->o.open_files = td->nr_open_files;
355 if (td->o.open_files == td->nr_open_files)
362 for_each_file(td, f, i)
363 td_io_close_file(td, f);
369 * open/close all files, so that ->real_file_size gets set
371 static int get_file_sizes(struct thread_data *td)
377 for_each_file(td, f, i) {
378 if (td->io_ops->open_file(td, f)) {
379 if (td->error != ENOENT) {
380 log_err("%s\n", td->verror);
385 if (td->io_ops->close_file)
386 td->io_ops->close_file(td, f);
389 if (f->real_file_size == -1ULL && td->o.size)
390 f->real_file_size = td->o.size / td->o.nr_files;
397 * Open the files and setup files sizes, creating files if necessary.
399 int setup_files(struct thread_data *td)
401 unsigned long long total_size, extend_size;
404 int err = 0, need_extend;
406 dprint(FD_FILE, "setup files\n");
409 * if ioengine defines a setup() method, it's responsible for
410 * opening the files and setting f->real_file_size to indicate
411 * the valid range for that file.
413 if (td->io_ops->setup)
414 err = td->io_ops->setup(td);
416 err = get_file_sizes(td);
422 * check sizes. if the files/devices do not exist and the size
423 * isn't passed to fio, abort.
426 for_each_file(td, f, i) {
427 if (f->real_file_size == -1ULL)
430 total_size += f->real_file_size;
434 * device/file sizes are zero and no size given, punt
436 if ((!total_size || total_size == -1ULL) && !td->o.size &&
437 !(td->io_ops->flags & FIO_NOIO) && !td->o.fill_device) {
438 log_err("%s: you need to specify size=\n", td->o.name);
439 td_verror(td, EINVAL, "total_file_size");
444 * now file sizes are known, so we can set ->io_size. if size= is
445 * not given, ->io_size is just equal to ->real_file_size. if size
446 * is given, ->io_size is size / nr_files.
448 extend_size = total_size = 0;
450 for_each_file(td, f, i) {
451 f->file_offset = td->o.start_offset;
453 if (!td->o.file_size_low) {
455 * no file size range given, file size is equal to
456 * total size divided by number of files. if that is
457 * zero, set it to the real file size.
459 f->io_size = td->o.size / td->o.nr_files;
461 f->io_size = f->real_file_size - f->file_offset;
462 } else if (f->real_file_size < td->o.file_size_low ||
463 f->real_file_size > td->o.file_size_high) {
464 if (f->file_offset > td->o.file_size_low)
467 * file size given. if it's fixed, use that. if it's a
468 * range, generate a random size in-between.
470 if (td->o.file_size_low == td->o.file_size_high)
471 f->io_size = td->o.file_size_low - f->file_offset;
473 f->io_size = get_rand_file_size(td) - f->file_offset;
475 f->io_size = f->real_file_size - f->file_offset;
477 if (f->io_size == -1ULL)
480 total_size += f->io_size;
482 if (f->filetype == FIO_TYPE_FILE &&
483 (f->io_size + f->file_offset) > f->real_file_size &&
484 !(td->io_ops->flags & FIO_DISKLESSIO)) {
486 extend_size += (f->io_size + f->file_offset);
487 f->flags |= FIO_FILE_EXTEND;
491 if (!td->o.size || td->o.size > total_size)
492 td->o.size = total_size;
495 * See if we need to extend some files
499 log_info("%s: Laying out IO file(s) (%u file(s) / %LuMiB)\n",
500 td->o.name, need_extend, extend_size >> 20);
502 for_each_file(td, f, i) {
503 if (!(f->flags & FIO_FILE_EXTEND))
506 assert(f->filetype == FIO_TYPE_FILE);
507 f->flags &= ~FIO_FILE_EXTEND;
508 f->real_file_size = (f->io_size + f->file_offset);
509 err = extend_file(td, f);
519 if (!td->o.zone_size)
520 td->o.zone_size = td->o.size;
523 * iolog already set the total io size, if we read back
526 if (!td->o.read_iolog_file)
527 td->total_io_size = td->o.size * td->o.loops;
530 log_err("%s: you need to specify valid offset=\n", td->o.name);
534 int init_random_map(struct thread_data *td)
536 unsigned long long blocks, num_maps;
540 if (td->o.norandommap || !td_random(td))
543 for_each_file(td, f, i) {
544 blocks = (f->real_file_size + td->o.rw_min_bs - 1) / (unsigned long long) td->o.rw_min_bs;
545 num_maps = (blocks + BLOCKS_PER_MAP-1)/ (unsigned long long) BLOCKS_PER_MAP;
546 f->file_map = smalloc(num_maps * sizeof(long));
548 log_err("fio: failed allocating random map. If running a large number of jobs, try the 'norandommap' option\n");
551 f->num_maps = num_maps;
557 void close_files(struct thread_data *td)
562 for_each_file(td, f, i)
563 td_io_close_file(td, f);
566 void close_and_free_files(struct thread_data *td)
571 dprint(FD_FILE, "close files\n");
573 for_each_file(td, f, i) {
574 if (td->o.unlink && f->filetype == FIO_TYPE_FILE)
575 unlink(f->file_name);
577 td_io_close_file(td, f);
589 td->o.filename = NULL;
595 static void get_file_type(struct fio_file *f)
599 if (!strcmp(f->file_name, "-"))
600 f->filetype = FIO_TYPE_PIPE;
602 f->filetype = FIO_TYPE_FILE;
604 if (!lstat(f->file_name, &sb)) {
605 if (S_ISBLK(sb.st_mode))
606 f->filetype = FIO_TYPE_BD;
607 else if (S_ISCHR(sb.st_mode))
608 f->filetype = FIO_TYPE_CHAR;
609 else if (S_ISFIFO(sb.st_mode))
610 f->filetype = FIO_TYPE_PIPE;
614 int add_file(struct thread_data *td, const char *fname)
616 int cur_files = td->files_index;
617 char file_name[PATH_MAX];
621 dprint(FD_FILE, "add file %s\n", fname);
623 f = smalloc(sizeof(*f));
626 td->files = realloc(td->files, (cur_files + 1) * sizeof(f));
628 td->files[cur_files] = f;
631 * init function, io engine may not be loaded yet
633 if (td->io_ops && (td->io_ops->flags & FIO_DISKLESSIO))
634 f->real_file_size = -1ULL;
637 len = sprintf(file_name, "%s/", td->o.directory);
639 sprintf(file_name + len, "%s", fname);
640 f->file_name = smalloc_strdup(file_name);
645 f->sem = fio_sem_init(1);
648 if (f->filetype == FIO_TYPE_FILE)
649 td->nr_normal_files++;
654 void get_file(struct fio_file *f)
656 dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
657 assert(f->flags & FIO_FILE_OPEN);
661 int put_file(struct thread_data *td, struct fio_file *f)
665 dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
667 if (!(f->flags & FIO_FILE_OPEN))
670 assert(f->references);
674 if (should_fsync(td) && td->o.fsync_on_close)
677 if (td->io_ops->close_file)
678 ret = td->io_ops->close_file(td, f);
681 f->flags &= ~FIO_FILE_OPEN;
685 void lock_file(struct thread_data *td, struct fio_file *f)
688 if (f->sem_owner == td && f->sem_batch--)
691 fio_sem_down(f->sem);
693 f->sem_batch = td->o.lockfile_batch;
697 void unlock_file(struct fio_file *f)
705 sem_getvalue(&f->sem->sem, &sem_val);
712 static int recurse_dir(struct thread_data *td, const char *dirname)
718 D = opendir(dirname);
720 char buf[FIO_VERROR_SIZE];
722 snprintf(buf, FIO_VERROR_SIZE - 1, "opendir(%s)", dirname);
723 td_verror(td, errno, buf);
727 while ((dir = readdir(D)) != NULL) {
728 char full_path[PATH_MAX];
731 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
734 sprintf(full_path, "%s/%s", dirname, dir->d_name);
736 if (lstat(full_path, &sb) == -1) {
737 if (errno != ENOENT) {
738 td_verror(td, errno, "stat");
743 if (S_ISREG(sb.st_mode)) {
744 add_file(td, full_path);
748 if (!S_ISDIR(sb.st_mode))
751 if ((ret = recurse_dir(td, full_path)) != 0)
759 int add_dir_files(struct thread_data *td, const char *path)
761 int ret = recurse_dir(td, path);
764 log_info("fio: opendir added %d files\n", td->o.nr_files);
769 void dup_files(struct thread_data *td, struct thread_data *org)
778 bytes = org->files_index * sizeof(f);
779 td->files = malloc(bytes);
780 memcpy(td->files, org->files, bytes);
782 for_each_file(td, f, i) {
783 struct fio_file *__f;
785 __f = smalloc(sizeof(*__f));
788 __f->file_name = smalloc_strdup(f->file_name);
795 * Returns the index that matches the filename, or -1 if not there
797 int get_fileno(struct thread_data *td, const char *fname)
802 for_each_file(td, f, i)
803 if (!strcmp(f->file_name, fname))
810 * For log usage, where we add/open/close files automatically
812 void free_release_files(struct thread_data *td)
816 td->nr_normal_files = 0;