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)
234 dprint(FD_FILE, "fd open %s\n", f->file_name);
236 if (!strcmp(f->file_name, "-")) {
238 log_err("fio: can't read/write to stdin/out\n");
244 * move output logging to stderr, if we are writing to stdout
251 flags |= OS_O_DIRECT;
254 if (f->filetype != FIO_TYPE_FILE)
263 if (f->filetype == FIO_TYPE_FILE)
267 f->fd = dup(STDOUT_FILENO);
269 f->fd = open(f->file_name, flags, 0600);
271 if (f->filetype == FIO_TYPE_CHAR && !read_only)
277 f->fd = dup(STDIN_FILENO);
279 f->fd = open(f->file_name, flags);
283 char buf[FIO_VERROR_SIZE];
286 if (errno == EPERM && (flags & O_NOATIME)) {
291 snprintf(buf, sizeof(buf) - 1, "open(%s)", f->file_name);
293 td_verror(td, __e, buf);
296 if (get_file_size(td, f))
307 int open_files(struct thread_data *td)
313 dprint(FD_FILE, "open files\n");
315 for_each_file(td, f, i) {
316 err = td_io_open_file(td, f);
318 if (td->error == EMFILE) {
319 log_err("fio: limited open files to: %d\n", td->nr_open_files);
320 td->o.open_files = td->nr_open_files;
327 if (td->o.open_files == td->nr_open_files)
334 for_each_file(td, f, i)
335 td_io_close_file(td, f);
341 * open/close all files, so that ->real_file_size gets set
343 static int get_file_sizes(struct thread_data *td)
349 for_each_file(td, f, i) {
350 if (td->io_ops->open_file(td, f)) {
351 if (td->error != ENOENT) {
352 log_err("%s\n", td->verror);
357 if (td->io_ops->close_file)
358 td->io_ops->close_file(td, f);
361 if (f->real_file_size == -1ULL && td->o.size)
362 f->real_file_size = td->o.size / td->o.nr_files;
369 * Open the files and setup files sizes, creating files if necessary.
371 int setup_files(struct thread_data *td)
373 unsigned long long total_size, extend_size;
376 int err = 0, need_extend;
378 dprint(FD_FILE, "setup files\n");
381 * if ioengine defines a setup() method, it's responsible for
382 * opening the files and setting f->real_file_size to indicate
383 * the valid range for that file.
385 if (td->io_ops->setup)
386 err = td->io_ops->setup(td);
388 err = get_file_sizes(td);
394 * check sizes. if the files/devices do not exist and the size
395 * isn't passed to fio, abort.
398 for_each_file(td, f, i) {
399 if (f->real_file_size == -1ULL)
402 total_size += f->real_file_size;
406 * device/file sizes are zero and no size given, punt
408 if ((!total_size || total_size == -1ULL) && !td->o.size &&
409 !(td->io_ops->flags & FIO_NOIO) && !td->o.fill_device) {
410 log_err("%s: you need to specify size=\n", td->o.name);
411 td_verror(td, EINVAL, "total_file_size");
416 * now file sizes are known, so we can set ->io_size. if size= is
417 * not given, ->io_size is just equal to ->real_file_size. if size
418 * is given, ->io_size is size / nr_files.
420 extend_size = total_size = 0;
422 for_each_file(td, f, i) {
423 f->file_offset = td->o.start_offset;
425 if (!td->o.file_size_low) {
427 * no file size range given, file size is equal to
428 * total size divided by number of files. if that is
429 * zero, set it to the real file size.
431 f->io_size = td->o.size / td->o.nr_files;
433 f->io_size = f->real_file_size - f->file_offset;
434 } else if (f->real_file_size < td->o.file_size_low ||
435 f->real_file_size > td->o.file_size_high) {
436 if (f->file_offset > td->o.file_size_low)
439 * file size given. if it's fixed, use that. if it's a
440 * range, generate a random size in-between.
442 if (td->o.file_size_low == td->o.file_size_high)
443 f->io_size = td->o.file_size_low - f->file_offset;
445 f->io_size = get_rand_file_size(td) - f->file_offset;
447 f->io_size = f->real_file_size - f->file_offset;
449 if (f->io_size == -1ULL)
452 total_size += f->io_size;
454 if (f->filetype == FIO_TYPE_FILE &&
455 (f->io_size + f->file_offset) > f->real_file_size &&
456 !(td->io_ops->flags & FIO_DISKLESSIO)) {
458 extend_size += (f->io_size + f->file_offset);
459 f->flags |= FIO_FILE_EXTEND;
463 if (!td->o.size || td->o.size > total_size)
464 td->o.size = total_size;
467 * See if we need to extend some files
471 log_info("%s: Laying out IO file(s) (%u file(s) / %LuMiB)\n",
472 td->o.name, need_extend, extend_size >> 20);
474 for_each_file(td, f, i) {
475 if (!(f->flags & FIO_FILE_EXTEND))
478 assert(f->filetype == FIO_TYPE_FILE);
479 f->flags &= ~FIO_FILE_EXTEND;
480 f->real_file_size = (f->io_size + f->file_offset);
481 err = extend_file(td, f);
491 if (!td->o.zone_size)
492 td->o.zone_size = td->o.size;
495 * iolog already set the total io size, if we read back
498 if (!td->o.read_iolog_file)
499 td->total_io_size = td->o.size * td->o.loops;
502 log_err("%s: you need to specify valid offset=\n", td->o.name);
506 int init_random_map(struct thread_data *td)
508 unsigned long long blocks, num_maps;
512 if (td->o.norandommap || !td_random(td))
515 for_each_file(td, f, i) {
516 blocks = (f->real_file_size + td->o.rw_min_bs - 1) / (unsigned long long) td->o.rw_min_bs;
517 num_maps = (blocks + BLOCKS_PER_MAP-1)/ (unsigned long long) BLOCKS_PER_MAP;
518 f->file_map = smalloc(num_maps * sizeof(long));
520 log_err("fio: failed allocating random map. If running a large number of jobs, try the 'norandommap' option\n");
523 f->num_maps = num_maps;
529 void close_files(struct thread_data *td)
534 for_each_file(td, f, i)
535 td_io_close_file(td, f);
538 void close_and_free_files(struct thread_data *td)
543 dprint(FD_FILE, "close files\n");
545 for_each_file(td, f, i) {
546 if (td->o.unlink && f->filetype == FIO_TYPE_FILE)
547 unlink(f->file_name);
549 td_io_close_file(td, f);
561 td->o.filename = NULL;
567 static void get_file_type(struct fio_file *f)
571 if (!strcmp(f->file_name, "-"))
572 f->filetype = FIO_TYPE_PIPE;
574 f->filetype = FIO_TYPE_FILE;
576 if (!lstat(f->file_name, &sb)) {
577 if (S_ISBLK(sb.st_mode))
578 f->filetype = FIO_TYPE_BD;
579 else if (S_ISCHR(sb.st_mode))
580 f->filetype = FIO_TYPE_CHAR;
581 else if (S_ISFIFO(sb.st_mode))
582 f->filetype = FIO_TYPE_PIPE;
586 int add_file(struct thread_data *td, const char *fname)
588 int cur_files = td->files_index;
589 char file_name[PATH_MAX];
593 dprint(FD_FILE, "add file %s\n", fname);
595 f = smalloc(sizeof(*f));
598 td->files = realloc(td->files, (cur_files + 1) * sizeof(f));
600 td->files[cur_files] = f;
603 * init function, io engine may not be loaded yet
605 if (td->io_ops && (td->io_ops->flags & FIO_DISKLESSIO))
606 f->real_file_size = -1ULL;
609 len = sprintf(file_name, "%s/", td->o.directory);
611 sprintf(file_name + len, "%s", fname);
612 f->file_name = smalloc_strdup(file_name);
617 if (f->filetype == FIO_TYPE_FILE)
618 td->nr_normal_files++;
623 void get_file(struct fio_file *f)
625 dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
626 assert(f->flags & FIO_FILE_OPEN);
630 int put_file(struct thread_data *td, struct fio_file *f)
634 dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
636 if (!(f->flags & FIO_FILE_OPEN))
639 assert(f->references);
643 if (should_fsync(td) && td->o.fsync_on_close)
646 if (td->io_ops->close_file)
647 ret = td->io_ops->close_file(td, f);
650 f->flags &= ~FIO_FILE_OPEN;
654 void lock_file(struct thread_data *td, struct fio_file *f)
658 void unlock_file(struct fio_file *f)
662 static int recurse_dir(struct thread_data *td, const char *dirname)
668 D = opendir(dirname);
670 char buf[FIO_VERROR_SIZE];
672 snprintf(buf, FIO_VERROR_SIZE - 1, "opendir(%s)", dirname);
673 td_verror(td, errno, buf);
677 while ((dir = readdir(D)) != NULL) {
678 char full_path[PATH_MAX];
681 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
684 sprintf(full_path, "%s/%s", dirname, dir->d_name);
686 if (lstat(full_path, &sb) == -1) {
687 if (errno != ENOENT) {
688 td_verror(td, errno, "stat");
693 if (S_ISREG(sb.st_mode)) {
694 add_file(td, full_path);
698 if (!S_ISDIR(sb.st_mode))
701 if ((ret = recurse_dir(td, full_path)) != 0)
709 int add_dir_files(struct thread_data *td, const char *path)
711 int ret = recurse_dir(td, path);
714 log_info("fio: opendir added %d files\n", td->o.nr_files);
719 void dup_files(struct thread_data *td, struct thread_data *org)
728 bytes = org->files_index * sizeof(f);
729 td->files = malloc(bytes);
730 memcpy(td->files, org->files, bytes);
732 for_each_file(td, f, i) {
733 struct fio_file *__f;
735 __f = smalloc(sizeof(*__f));
738 __f->file_name = smalloc_strdup(f->file_name);
745 * Returns the index that matches the filename, or -1 if not there
747 int get_fileno(struct thread_data *td, const char *fname)
752 for_each_file(td, f, i)
753 if (!strcmp(f->file_name, fname))
760 * For log usage, where we add/open/close files automatically
762 void free_release_files(struct thread_data *td)
766 td->nr_normal_files = 0;