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)
297 if (f->filetype == FIO_TYPE_FILE)
301 f->fd = dup(STDOUT_FILENO);
303 from_hash = file_lookup_open(f, flags);
305 if (f->filetype == FIO_TYPE_CHAR && !read_only)
311 f->fd = dup(STDIN_FILENO);
313 from_hash = file_lookup_open(f, flags);
317 char buf[FIO_VERROR_SIZE];
320 if (errno == EPERM && (flags & O_NOATIME)) {
325 snprintf(buf, sizeof(buf) - 1, "open(%s)", f->file_name);
327 td_verror(td, __e, buf);
330 if (get_file_size(td, f))
333 if (!from_hash && f->fd != -1) {
334 if (add_file_hash(f)) {
338 * OK to ignore, we haven't done anything with it
340 ret = generic_close_file(td, f);
351 int open_files(struct thread_data *td)
357 dprint(FD_FILE, "open files\n");
359 for_each_file(td, f, i) {
360 err = td_io_open_file(td, f);
362 if (td->error == EMFILE) {
363 log_err("fio: limited open files to: %d\n",
365 td->o.open_files = td->nr_open_files;
372 if (td->o.open_files == td->nr_open_files)
379 for_each_file(td, f, i)
380 td_io_close_file(td, f);
386 * open/close all files, so that ->real_file_size gets set
388 static int get_file_sizes(struct thread_data *td)
394 for_each_file(td, f, i) {
395 dprint(FD_FILE, "get file size for %p/%d/%p\n", f, i,
398 if (td->io_ops->open_file(td, f)) {
399 if (td->error != ENOENT) {
400 log_err("%s\n", td->verror);
405 if (td->io_ops->close_file)
406 td->io_ops->close_file(td, f);
409 if (f->real_file_size == -1ULL && td->o.size)
410 f->real_file_size = td->o.size / td->o.nr_files;
417 * Open the files and setup files sizes, creating files if necessary.
419 int setup_files(struct thread_data *td)
421 unsigned long long total_size, extend_size;
424 int err = 0, need_extend;
426 dprint(FD_FILE, "setup files\n");
428 if (td->o.read_iolog_file)
432 * if ioengine defines a setup() method, it's responsible for
433 * opening the files and setting f->real_file_size to indicate
434 * the valid range for that file.
436 if (td->io_ops->setup)
437 err = td->io_ops->setup(td);
439 err = get_file_sizes(td);
445 * check sizes. if the files/devices do not exist and the size
446 * isn't passed to fio, abort.
449 for_each_file(td, f, i) {
450 if (f->real_file_size == -1ULL)
453 total_size += f->real_file_size;
457 * device/file sizes are zero and no size given, punt
459 if ((!total_size || total_size == -1ULL) && !td->o.size &&
460 !(td->io_ops->flags & FIO_NOIO) && !td->o.fill_device) {
461 log_err("%s: you need to specify size=\n", td->o.name);
462 td_verror(td, EINVAL, "total_file_size");
467 * now file sizes are known, so we can set ->io_size. if size= is
468 * not given, ->io_size is just equal to ->real_file_size. if size
469 * is given, ->io_size is size / nr_files.
471 extend_size = total_size = 0;
473 for_each_file(td, f, i) {
474 f->file_offset = td->o.start_offset;
476 if (!td->o.file_size_low) {
478 * no file size range given, file size is equal to
479 * total size divided by number of files. if that is
480 * zero, set it to the real file size.
482 f->io_size = td->o.size / td->o.nr_files;
484 f->io_size = f->real_file_size - f->file_offset;
485 } else if (f->real_file_size < td->o.file_size_low ||
486 f->real_file_size > td->o.file_size_high) {
487 if (f->file_offset > td->o.file_size_low)
490 * file size given. if it's fixed, use that. if it's a
491 * range, generate a random size in-between.
493 if (td->o.file_size_low == td->o.file_size_high) {
494 f->io_size = td->o.file_size_low
497 f->io_size = get_rand_file_size(td)
501 f->io_size = f->real_file_size - f->file_offset;
503 if (f->io_size == -1ULL)
506 total_size += f->io_size;
508 if (f->filetype == FIO_TYPE_FILE &&
509 (f->io_size + f->file_offset) > f->real_file_size &&
510 !(td->io_ops->flags & FIO_DISKLESSIO)) {
512 extend_size += (f->io_size + f->file_offset);
513 f->flags |= FIO_FILE_EXTEND;
517 if (!td->o.size || td->o.size > total_size)
518 td->o.size = total_size;
521 * See if we need to extend some files
525 log_info("%s: Laying out IO file(s) (%u file(s) / %LuMiB)\n",
526 td->o.name, need_extend, extend_size >> 20);
528 for_each_file(td, f, i) {
529 if (!(f->flags & FIO_FILE_EXTEND))
532 assert(f->filetype == FIO_TYPE_FILE);
533 f->flags &= ~FIO_FILE_EXTEND;
534 f->real_file_size = (f->io_size + f->file_offset);
535 err = extend_file(td, f);
545 if (!td->o.zone_size)
546 td->o.zone_size = td->o.size;
549 * iolog already set the total io size, if we read back
552 if (!td->o.read_iolog_file)
553 td->total_io_size = td->o.size * td->o.loops;
556 log_err("%s: you need to specify valid offset=\n", td->o.name);
560 int init_random_map(struct thread_data *td)
562 unsigned long long blocks, num_maps;
566 if (td->o.norandommap || !td_random(td))
569 for_each_file(td, f, i) {
570 blocks = (f->real_file_size + td->o.rw_min_bs - 1) /
571 (unsigned long long) td->o.rw_min_bs;
572 num_maps = (blocks + BLOCKS_PER_MAP - 1) /
573 (unsigned long long) BLOCKS_PER_MAP;
574 f->file_map = smalloc(num_maps * sizeof(long));
576 log_err("fio: failed allocating random map. If running"
577 " a large number of jobs, try the 'norandommap'"
581 f->num_maps = num_maps;
587 void close_files(struct thread_data *td)
592 for_each_file(td, f, i)
593 td_io_close_file(td, f);
596 void close_and_free_files(struct thread_data *td)
601 dprint(FD_FILE, "close files\n");
603 for_each_file(td, f, i) {
604 if (td->o.unlink && f->filetype == FIO_TYPE_FILE)
605 unlink(f->file_name);
607 td_io_close_file(td, f);
619 td->o.filename = NULL;
626 static void get_file_type(struct fio_file *f)
630 if (!strcmp(f->file_name, "-"))
631 f->filetype = FIO_TYPE_PIPE;
633 f->filetype = FIO_TYPE_FILE;
635 if (!lstat(f->file_name, &sb)) {
636 if (S_ISBLK(sb.st_mode))
637 f->filetype = FIO_TYPE_BD;
638 else if (S_ISCHR(sb.st_mode))
639 f->filetype = FIO_TYPE_CHAR;
640 else if (S_ISFIFO(sb.st_mode))
641 f->filetype = FIO_TYPE_PIPE;
645 int add_file(struct thread_data *td, const char *fname)
647 int cur_files = td->files_index;
648 char file_name[PATH_MAX];
652 dprint(FD_FILE, "add file %s\n", fname);
654 f = smalloc(sizeof(*f));
657 dprint(FD_FILE, "resize file array to %d files\n", cur_files + 1);
659 td->files = realloc(td->files, (cur_files + 1) * sizeof(f));
660 td->files[cur_files] = f;
663 * init function, io engine may not be loaded yet
665 if (td->io_ops && (td->io_ops->flags & FIO_DISKLESSIO))
666 f->real_file_size = -1ULL;
669 len = sprintf(file_name, "%s/", td->o.directory);
671 sprintf(file_name + len, "%s", fname);
672 f->file_name = smalloc_strdup(file_name);
676 switch (td->o.file_lock_mode) {
679 case FILE_LOCK_READWRITE:
680 f->lock = fio_mutex_rw_init();
682 case FILE_LOCK_EXCLUSIVE:
683 f->lock = fio_mutex_init(1);
686 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
691 if (f->filetype == FIO_TYPE_FILE)
692 td->nr_normal_files++;
694 dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name,
700 void get_file(struct fio_file *f)
702 dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
703 assert(f->flags & FIO_FILE_OPEN);
707 int put_file(struct thread_data *td, struct fio_file *f)
709 int f_ret = 0, ret = 0;
711 dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
713 if (!(f->flags & FIO_FILE_OPEN))
716 assert(f->references);
720 if (should_fsync(td) && td->o.fsync_on_close)
721 f_ret = fsync(f->fd);
723 if (td->io_ops->close_file)
724 ret = td->io_ops->close_file(td, f);
730 f->flags &= ~FIO_FILE_OPEN;
734 void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
736 if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
739 if (f->lock_owner == td && f->lock_batch--)
742 if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
743 if (ddir == DDIR_READ)
744 fio_mutex_down_read(f->lock);
746 fio_mutex_down_write(f->lock);
747 } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
748 fio_mutex_down(f->lock);
751 f->lock_batch = td->o.lockfile_batch;
755 void unlock_file(struct thread_data *td, struct fio_file *f)
757 if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
762 if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
763 const int is_read = f->lock_ddir == DDIR_READ;
764 int val = fio_mutex_getval(f->lock);
766 if ((is_read && val == 1) || (!is_read && val == -1))
767 f->lock_owner = NULL;
770 fio_mutex_up_read(f->lock);
772 fio_mutex_up_write(f->lock);
773 } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE) {
774 int val = fio_mutex_getval(f->lock);
777 f->lock_owner = NULL;
779 fio_mutex_up(f->lock);
783 void unlock_file_all(struct thread_data *td, struct fio_file *f)
785 if (f->lock_owner != td)
792 static int recurse_dir(struct thread_data *td, const char *dirname)
798 D = opendir(dirname);
800 char buf[FIO_VERROR_SIZE];
802 snprintf(buf, FIO_VERROR_SIZE - 1, "opendir(%s)", dirname);
803 td_verror(td, errno, buf);
807 while ((dir = readdir(D)) != NULL) {
808 char full_path[PATH_MAX];
811 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
814 sprintf(full_path, "%s/%s", dirname, dir->d_name);
816 if (lstat(full_path, &sb) == -1) {
817 if (errno != ENOENT) {
818 td_verror(td, errno, "stat");
823 if (S_ISREG(sb.st_mode)) {
824 add_file(td, full_path);
828 if (!S_ISDIR(sb.st_mode))
831 ret = recurse_dir(td, full_path);
840 int add_dir_files(struct thread_data *td, const char *path)
842 int ret = recurse_dir(td, path);
845 log_info("fio: opendir added %d files\n", td->o.nr_files);
850 void dup_files(struct thread_data *td, struct thread_data *org)
855 dprint(FD_FILE, "dup files: %d\n", org->files_index);
860 td->files = malloc(org->files_index * sizeof(f));
862 for_each_file(org, f, i) {
863 struct fio_file *__f;
865 __f = smalloc(sizeof(*__f));
868 __f->file_name = smalloc_strdup(f->file_name);
875 * Returns the index that matches the filename, or -1 if not there
877 int get_fileno(struct thread_data *td, const char *fname)
882 for_each_file(td, f, i)
883 if (!strcmp(f->file_name, fname))
890 * For log usage, where we add/open/close files automatically
892 void free_release_files(struct thread_data *td)
896 td->nr_normal_files = 0;