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 dprint(FD_FILE, "fallocate file %s, size %llu\n", f->file_name,
73 r = posix_fallocate(f->fd, 0, f->real_file_size);
75 log_err("fio: posix_fallocate fails: %s\n", strerror(-r));
77 b = malloc(td->o.max_bs[DDIR_WRITE]);
78 memset(b, 0, td->o.max_bs[DDIR_WRITE]);
80 left = f->real_file_size;
81 while (left && !td->terminate) {
82 bs = td->o.max_bs[DDIR_WRITE];
86 r = write(f->fd, b, bs);
93 td_verror(td, errno, "write");
95 td_verror(td, EIO, "write");
102 dprint(FD_FILE, "terminate unlink %s\n", f->file_name);
103 unlink(f->file_name);
104 } else if (td->o.create_fsync) {
105 if (fsync(f->fd) < 0) {
106 td_verror(td, errno, "fsync");
120 static unsigned long long get_rand_file_size(struct thread_data *td)
122 unsigned long long ret, size_d;
125 r = os_random_long(&td->file_size_state);
126 size_d = td->o.file_size_high - td->o.file_size_low;
127 ret = (unsigned long long) ((double) size_d * (r / (RAND_MAX + 1.0)));
128 ret += td->o.file_size_low;
129 ret -= (ret % td->o.rw_min_bs);
133 static int file_size(struct thread_data *td, struct fio_file *f)
137 if (fstat(f->fd, &st) == -1) {
138 td_verror(td, errno, "fstat");
142 f->real_file_size = st.st_size;
146 static int bdev_size(struct thread_data *td, struct fio_file *f)
148 unsigned long long bytes;
151 r = blockdev_size(f->fd, &bytes);
153 td_verror(td, r, "blockdev_size");
157 f->real_file_size = bytes;
161 static int get_file_size(struct thread_data *td, struct fio_file *f)
165 if (f->flags & FIO_SIZE_KNOWN)
168 if (f->filetype == FIO_TYPE_FILE)
169 ret = file_size(td, f);
170 else if (f->filetype == FIO_TYPE_BD)
171 ret = bdev_size(td, f);
173 f->real_file_size = -1;
178 if (f->file_offset > f->real_file_size) {
179 log_err("%s: offset extends end (%Lu > %Lu)\n", td->o.name,
180 f->file_offset, f->real_file_size);
184 f->flags |= FIO_SIZE_KNOWN;
188 static int __file_invalidate_cache(struct thread_data *td, struct fio_file *f,
189 unsigned long long off,
190 unsigned long long len)
197 off = f->file_offset;
199 dprint(FD_IO, "invalidate cache %s: %llu/%llu\n", f->file_name, off,
203 * FIXME: add blockdev flushing too
206 ret = madvise(f->mmap, len, MADV_DONTNEED);
207 else if (f->filetype == FIO_TYPE_FILE) {
208 ret = fadvise(f->fd, off, len, POSIX_FADV_DONTNEED);
209 } else if (f->filetype == FIO_TYPE_BD) {
210 ret = blockdev_invalidate_cache(f->fd);
211 if (ret < 0 && errno == EACCES && geteuid()) {
213 log_err("fio: only root may flush block "
214 "devices. Cache flush bypassed!\n");
219 } else if (f->filetype == FIO_TYPE_CHAR || f->filetype == FIO_TYPE_PIPE)
223 td_verror(td, errno, "invalidate_cache");
225 } else if (ret > 0) {
226 td_verror(td, ret, "invalidate_cache");
234 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
236 if (!(f->flags & FIO_FILE_OPEN))
239 return __file_invalidate_cache(td, f, -1, -1);
242 int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
246 dprint(FD_FILE, "fd close %s\n", f->file_name);
250 if (close(f->fd) < 0)
257 static int file_lookup_open(struct fio_file *f, int flags)
259 struct fio_file *__f;
262 __f = lookup_file_hash(f->file_name);
264 dprint(FD_FILE, "found file in hash %s\n", f->file_name);
266 * racy, need the __f->lock locked
269 f->lock_owner = __f->lock_owner;
270 f->lock_batch = __f->lock_batch;
271 f->lock_ddir = __f->lock_ddir;
274 dprint(FD_FILE, "file not found in hash %s\n", f->file_name);
278 f->fd = open(f->file_name, flags, 0600);
282 int generic_open_file(struct thread_data *td, struct fio_file *f)
288 dprint(FD_FILE, "fd open %s\n", f->file_name);
290 if (!strcmp(f->file_name, "-")) {
292 log_err("fio: can't read/write to stdin/out\n");
298 * move output logging to stderr, if we are writing to stdout
305 flags |= OS_O_DIRECT;
308 if (f->filetype != FIO_TYPE_FILE)
309 flags |= FIO_O_NOATIME;
316 if (f->filetype == FIO_TYPE_FILE)
320 f->fd = dup(STDOUT_FILENO);
322 from_hash = file_lookup_open(f, flags);
324 if (f->filetype == FIO_TYPE_CHAR && !read_only)
330 f->fd = dup(STDIN_FILENO);
332 from_hash = file_lookup_open(f, flags);
336 char buf[FIO_VERROR_SIZE];
339 if (errno == EPERM && (flags & FIO_O_NOATIME)) {
340 flags &= ~FIO_O_NOATIME;
344 snprintf(buf, sizeof(buf) - 1, "open(%s)", f->file_name);
346 td_verror(td, __e, buf);
349 if (get_file_size(td, f))
352 if (!from_hash && f->fd != -1) {
353 if (add_file_hash(f)) {
357 * OK to ignore, we haven't done anything with it
359 ret = generic_close_file(td, f);
370 int open_files(struct thread_data *td)
376 dprint(FD_FILE, "open files\n");
378 for_each_file(td, f, i) {
379 err = td_io_open_file(td, f);
381 if (td->error == EMFILE) {
382 log_err("fio: limited open files to: %d\n",
384 td->o.open_files = td->nr_open_files;
391 if (td->o.open_files == td->nr_open_files)
398 for_each_file(td, f, i)
399 td_io_close_file(td, f);
405 * open/close all files, so that ->real_file_size gets set
407 static int get_file_sizes(struct thread_data *td)
413 for_each_file(td, f, i) {
414 dprint(FD_FILE, "get file size for %p/%d/%p\n", f, i,
417 if (td->io_ops->open_file(td, f)) {
418 if (td->error != ENOENT) {
419 log_err("%s\n", td->verror);
424 if (td->io_ops->close_file)
425 td->io_ops->close_file(td, f);
428 if (f->real_file_size == -1ULL && td->o.size)
429 f->real_file_size = td->o.size / td->o.nr_files;
436 * Open the files and setup files sizes, creating files if necessary.
438 int setup_files(struct thread_data *td)
440 unsigned long long total_size, extend_size;
443 int err = 0, need_extend;
445 dprint(FD_FILE, "setup files\n");
447 if (td->o.read_iolog_file)
451 * if ioengine defines a setup() method, it's responsible for
452 * opening the files and setting f->real_file_size to indicate
453 * the valid range for that file.
455 if (td->io_ops->setup)
456 err = td->io_ops->setup(td);
458 err = get_file_sizes(td);
464 * check sizes. if the files/devices do not exist and the size
465 * isn't passed to fio, abort.
468 for_each_file(td, f, i) {
469 if (f->real_file_size == -1ULL)
472 total_size += f->real_file_size;
476 * device/file sizes are zero and no size given, punt
478 if ((!total_size || total_size == -1ULL) && !td->o.size &&
479 !(td->io_ops->flags & FIO_NOIO) && !td->o.fill_device) {
480 log_err("%s: you need to specify size=\n", td->o.name);
481 td_verror(td, EINVAL, "total_file_size");
486 * now file sizes are known, so we can set ->io_size. if size= is
487 * not given, ->io_size is just equal to ->real_file_size. if size
488 * is given, ->io_size is size / nr_files.
490 extend_size = total_size = 0;
492 for_each_file(td, f, i) {
493 f->file_offset = td->o.start_offset;
495 if (!td->o.file_size_low) {
497 * no file size range given, file size is equal to
498 * total size divided by number of files. if that is
499 * zero, set it to the real file size.
501 f->io_size = td->o.size / td->o.nr_files;
503 f->io_size = f->real_file_size - f->file_offset;
504 } else if (f->real_file_size < td->o.file_size_low ||
505 f->real_file_size > td->o.file_size_high) {
506 if (f->file_offset > td->o.file_size_low)
509 * file size given. if it's fixed, use that. if it's a
510 * range, generate a random size in-between.
512 if (td->o.file_size_low == td->o.file_size_high) {
513 f->io_size = td->o.file_size_low
516 f->io_size = get_rand_file_size(td)
520 f->io_size = f->real_file_size - f->file_offset;
522 if (f->io_size == -1ULL)
525 total_size += f->io_size;
527 if (f->filetype == FIO_TYPE_FILE &&
528 (f->io_size + f->file_offset) > f->real_file_size &&
529 !(td->io_ops->flags & FIO_DISKLESSIO)) {
531 extend_size += (f->io_size + f->file_offset);
532 f->flags |= FIO_FILE_EXTEND;
536 if (!td->o.size || td->o.size > total_size)
537 td->o.size = total_size;
540 * See if we need to extend some files
544 log_info("%s: Laying out IO file(s) (%u file(s) / %LuMiB)\n",
545 td->o.name, need_extend, extend_size >> 20);
547 for_each_file(td, f, i) {
548 unsigned long long old_len, extend_len;
550 if (!(f->flags & FIO_FILE_EXTEND))
553 assert(f->filetype == FIO_TYPE_FILE);
554 f->flags &= ~FIO_FILE_EXTEND;
555 old_len = f->real_file_size;
556 extend_len = f->io_size + f->file_offset - old_len;
557 f->real_file_size = (f->io_size + f->file_offset);
558 err = extend_file(td, f);
562 err = __file_invalidate_cache(td, f, old_len,
575 if (!td->o.zone_size)
576 td->o.zone_size = td->o.size;
579 * iolog already set the total io size, if we read back
582 if (!td->o.read_iolog_file)
583 td->total_io_size = td->o.size * td->o.loops;
586 log_err("%s: you need to specify valid offset=\n", td->o.name);
590 int init_random_map(struct thread_data *td)
592 unsigned long long blocks, num_maps;
596 if (td->o.norandommap || !td_random(td))
599 for_each_file(td, f, i) {
600 blocks = (f->real_file_size + td->o.rw_min_bs - 1) /
601 (unsigned long long) td->o.rw_min_bs;
602 num_maps = (blocks + BLOCKS_PER_MAP - 1) /
603 (unsigned long long) BLOCKS_PER_MAP;
604 f->file_map = smalloc(num_maps * sizeof(int));
606 f->num_maps = num_maps;
609 if (!td->o.softrandommap) {
610 log_err("fio: failed allocating random map. If running"
611 " a large number of jobs, try the 'norandommap'"
612 " option or set 'softrandommap'. Or give"
613 " a larger --alloc-size to fio.\n");
617 log_info("fio: file %s failed allocating random map. Running "
618 "job without.\n", f->file_name);
625 void close_files(struct thread_data *td)
630 for_each_file(td, f, i)
631 td_io_close_file(td, f);
634 void close_and_free_files(struct thread_data *td)
639 dprint(FD_FILE, "close files\n");
641 for_each_file(td, f, i) {
642 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
643 dprint(FD_FILE, "free unlink %s\n", f->file_name);
644 unlink(f->file_name);
647 td_io_close_file(td, f);
659 td->o.filename = NULL;
666 static void get_file_type(struct fio_file *f)
670 if (!strcmp(f->file_name, "-"))
671 f->filetype = FIO_TYPE_PIPE;
673 f->filetype = FIO_TYPE_FILE;
675 if (!lstat(f->file_name, &sb)) {
676 if (S_ISBLK(sb.st_mode))
677 f->filetype = FIO_TYPE_BD;
678 else if (S_ISCHR(sb.st_mode))
679 f->filetype = FIO_TYPE_CHAR;
680 else if (S_ISFIFO(sb.st_mode))
681 f->filetype = FIO_TYPE_PIPE;
685 int add_file(struct thread_data *td, const char *fname)
687 int cur_files = td->files_index;
688 char file_name[PATH_MAX];
692 dprint(FD_FILE, "add file %s\n", fname);
694 f = smalloc(sizeof(*f));
697 dprint(FD_FILE, "resize file array to %d files\n", cur_files + 1);
699 td->files = realloc(td->files, (cur_files + 1) * sizeof(f));
700 td->files[cur_files] = f;
703 * init function, io engine may not be loaded yet
705 if (td->io_ops && (td->io_ops->flags & FIO_DISKLESSIO))
706 f->real_file_size = -1ULL;
709 len = sprintf(file_name, "%s/", td->o.directory);
711 sprintf(file_name + len, "%s", fname);
712 f->file_name = smalloc_strdup(file_name);
716 switch (td->o.file_lock_mode) {
719 case FILE_LOCK_READWRITE:
720 f->lock = fio_mutex_rw_init();
722 case FILE_LOCK_EXCLUSIVE:
723 f->lock = fio_mutex_init(1);
726 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
731 if (f->filetype == FIO_TYPE_FILE)
732 td->nr_normal_files++;
734 dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name,
740 void get_file(struct fio_file *f)
742 dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
743 assert(f->flags & FIO_FILE_OPEN);
747 int put_file(struct thread_data *td, struct fio_file *f)
749 int f_ret = 0, ret = 0;
751 dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
753 if (!(f->flags & FIO_FILE_OPEN))
756 assert(f->references);
760 if (should_fsync(td) && td->o.fsync_on_close)
761 f_ret = fsync(f->fd);
763 if (td->io_ops->close_file)
764 ret = td->io_ops->close_file(td, f);
770 f->flags &= ~FIO_FILE_OPEN;
774 void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
776 if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
779 if (f->lock_owner == td && f->lock_batch--)
782 if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
783 if (ddir == DDIR_READ)
784 fio_mutex_down_read(f->lock);
786 fio_mutex_down_write(f->lock);
787 } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
788 fio_mutex_down(f->lock);
791 f->lock_batch = td->o.lockfile_batch;
795 void unlock_file(struct thread_data *td, struct fio_file *f)
797 if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
802 if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
803 const int is_read = f->lock_ddir == DDIR_READ;
804 int val = fio_mutex_getval(f->lock);
806 if ((is_read && val == 1) || (!is_read && val == -1))
807 f->lock_owner = NULL;
810 fio_mutex_up_read(f->lock);
812 fio_mutex_up_write(f->lock);
813 } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE) {
814 int val = fio_mutex_getval(f->lock);
817 f->lock_owner = NULL;
819 fio_mutex_up(f->lock);
823 void unlock_file_all(struct thread_data *td, struct fio_file *f)
825 if (f->lock_owner != td)
832 static int recurse_dir(struct thread_data *td, const char *dirname)
838 D = opendir(dirname);
840 char buf[FIO_VERROR_SIZE];
842 snprintf(buf, FIO_VERROR_SIZE - 1, "opendir(%s)", dirname);
843 td_verror(td, errno, buf);
847 while ((dir = readdir(D)) != NULL) {
848 char full_path[PATH_MAX];
851 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
854 sprintf(full_path, "%s/%s", dirname, dir->d_name);
856 if (lstat(full_path, &sb) == -1) {
857 if (errno != ENOENT) {
858 td_verror(td, errno, "stat");
863 if (S_ISREG(sb.st_mode)) {
864 add_file(td, full_path);
868 if (!S_ISDIR(sb.st_mode))
871 ret = recurse_dir(td, full_path);
880 int add_dir_files(struct thread_data *td, const char *path)
882 int ret = recurse_dir(td, path);
885 log_info("fio: opendir added %d files\n", td->o.nr_files);
890 void dup_files(struct thread_data *td, struct thread_data *org)
895 dprint(FD_FILE, "dup files: %d\n", org->files_index);
900 td->files = malloc(org->files_index * sizeof(f));
902 for_each_file(org, f, i) {
903 struct fio_file *__f;
905 __f = smalloc(sizeof(*__f));
908 __f->file_name = smalloc_strdup(f->file_name);
915 * Returns the index that matches the filename, or -1 if not there
917 int get_fileno(struct thread_data *td, const char *fname)
922 for_each_file(td, f, i)
923 if (!strcmp(f->file_name, fname))
930 * For log usage, where we add/open/close files automatically
932 void free_release_files(struct thread_data *td)
936 td->nr_normal_files = 0;