14 * Check if the file exists and it's large enough.
16 static int file_ok(struct thread_data *td, struct fio_file *f)
20 if (f->filetype != FIO_TYPE_FILE ||
21 (td->io_ops->flags & FIO_DISKLESSIO))
24 if (lstat(f->file_name, &st) == -1)
28 * if it's a special file, size is always ok for now
30 if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))
32 if (st.st_size < (off_t) f->file_size)
38 static int create_file(struct thread_data *td, struct fio_file *f)
40 unsigned long long left;
45 f->fd = open(f->file_name, O_WRONLY | O_CREAT | O_TRUNC, 0644);
47 td_verror(td, errno, "open");
51 if (ftruncate(f->fd, f->file_size) == -1) {
52 td_verror(td, errno, "ftruncate");
56 if (posix_fallocate(f->fd, 0, f->file_size) < 0) {
57 td_verror(td, errno, "posix_fallocate");
61 b = malloc(td->o.max_bs[DDIR_WRITE]);
62 memset(b, 0, td->o.max_bs[DDIR_WRITE]);
65 while (left && !td->terminate) {
66 bs = td->o.max_bs[DDIR_WRITE];
70 r = write(f->fd, b, bs);
77 td_verror(td, errno, "write");
79 td_verror(td, EIO, "write");
87 else if (td->o.create_fsync)
100 static unsigned long long set_rand_file_size(struct thread_data *td,
101 unsigned long long total_size)
103 unsigned long long upper = total_size;
104 unsigned long long ret;
107 if (upper > td->o.file_size_high)
108 upper = td->o.file_size_high;
109 else if (upper < td->o.file_size_low)
114 r = os_random_long(&td->file_size_state);
115 ret = td->o.file_size_low + (unsigned long long) ((double) upper * (r / (RAND_MAX + 1.0)));
116 ret -= (ret % td->o.rw_min_bs);
122 static int fill_file_size(struct thread_data *td, struct fio_file *f,
123 unsigned long long *file_size, int new_files)
125 if (!td->o.file_size_low) {
126 f->file_size = *file_size / new_files;
127 f->real_file_size = f->file_size;
130 * If we don't have enough space left for a file
131 * of the minimum size, bail.
133 if (*file_size < td->o.file_size_low)
136 f->file_size = set_rand_file_size(td, *file_size);
137 f->real_file_size = f->file_size;
138 *file_size -= f->file_size;
144 static int create_files(struct thread_data *td)
147 int err, need_create, can_extend;
148 unsigned long long total_file_size, local_file_size, create_size;
149 unsigned int i, new_files;
152 total_file_size = td->o.size;
153 for_each_file(td, f, i) {
154 unsigned long long s;
156 f->file_offset = td->o.start_offset;
158 if (f->filetype != FIO_TYPE_FILE)
161 if (f->flags & FIO_FILE_EXISTS) {
163 if (s > total_file_size)
166 total_file_size -= s;
172 * unless specifically asked for overwrite, let normal io extend it
174 can_extend = !td->o.overwrite && !(td->io_ops->flags & FIO_NOEXTEND);
176 for_each_file(td, f, i) {
177 if (fill_file_size(td, f, &total_file_size, new_files)) {
178 log_info("fio: limited to %d files\n", i);
187 local_file_size = total_file_size;
188 if (!local_file_size)
189 local_file_size = -1;
194 for_each_file(td, f, i) {
197 if (f->filetype != FIO_TYPE_FILE)
199 if (f->flags & FIO_FILE_EXISTS) {
200 total_file_size += f->file_size;
204 if (fill_file_size(td, f, &local_file_size, new_files)) {
205 log_info("fio: limited to %d files\n", i);
206 new_files -= (td->o.nr_files - i);
211 total_file_size += f->file_size;
212 create_size += f->file_size;
213 file_there = !file_ok(td, f);
215 if (file_there && td_write(td) && !td->o.overwrite) {
216 unlink(f->file_name);
220 need_create += !file_there;
226 if (!td->o.size && !total_file_size) {
227 log_err("Need size for create\n");
228 td_verror(td, EINVAL, "file_size");
233 log_info("%s: Laying out IO file(s) (%u files / %LuMiB)\n",
234 td->o.name, new_files, create_size >> 20);
237 for_each_file(td, f, i) {
239 * Only unlink files that we created.
241 f->flags &= ~FIO_FILE_UNLINK;
242 if (file_ok(td, f)) {
244 f->flags |= FIO_FILE_UNLINK;
246 err = create_file(td, f);
256 static int file_size(struct thread_data *td, struct fio_file *f)
260 if (td->o.overwrite) {
261 if (fstat(f->fd, &st) == -1) {
262 td_verror(td, errno, "fstat");
266 f->real_file_size = st.st_size;
268 if (!f->file_size || f->file_size > f->real_file_size)
269 f->file_size = f->real_file_size;
271 f->real_file_size = f->file_size;
276 static int bdev_size(struct thread_data *td, struct fio_file *f)
278 unsigned long long bytes;
281 r = blockdev_size(f->fd, &bytes);
283 td_verror(td, r, "blockdev_size");
287 f->real_file_size = bytes;
290 * no extend possibilities, so limit size to device size if too large
292 if (!f->file_size || f->file_size > f->real_file_size)
293 f->file_size = f->real_file_size;
295 f->file_size -= f->file_offset;
299 static int get_file_size(struct thread_data *td, struct fio_file *f)
303 if (f->filetype == FIO_TYPE_FILE) {
304 if (!(f->flags & FIO_FILE_EXISTS))
305 ret = file_size(td, f);
306 } else if (f->filetype == FIO_TYPE_BD)
307 ret = bdev_size(td, f);
309 f->real_file_size = -1;
314 if (f->file_offset > f->real_file_size) {
315 log_err("%s: offset extends end (%Lu > %Lu)\n", td->o.name, f->file_offset, f->real_file_size);
322 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
330 * FIXME: add blockdev flushing too
333 ret = madvise(f->mmap, f->file_size, MADV_DONTNEED);
334 else if (f->filetype == FIO_TYPE_FILE)
335 ret = fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_DONTNEED);
336 else if (f->filetype == FIO_TYPE_BD)
337 ret = blockdev_invalidate_cache(f->fd);
338 else if (f->filetype == FIO_TYPE_CHAR)
342 td_verror(td, errno, "invalidate_cache");
349 void generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
355 int generic_open_file(struct thread_data *td, struct fio_file *f)
360 flags |= OS_O_DIRECT;
364 if (td_write(td) || td_rw(td)) {
367 if (f->filetype == FIO_TYPE_FILE)
370 f->fd = open(f->file_name, flags, 0600);
372 if (f->filetype == FIO_TYPE_CHAR)
377 f->fd = open(f->file_name, flags);
383 td_verror(td, __e, "open");
384 if (__e == EINVAL && td->o.odirect)
385 log_err("fio: destination does not support O_DIRECT\n");
387 log_err("fio: try reducing/setting openfiles (failed at %u of %u)\n", td->nr_open_files, td->o.nr_files);
391 if (get_file_size(td, f))
394 if (td->o.invalidate_cache && file_invalidate_cache(td, f))
397 if (!td_random(td)) {
398 if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_SEQUENTIAL) < 0) {
399 td_verror(td, errno, "fadvise");
403 if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_RANDOM) < 0) {
404 td_verror(td, errno, "fadvise");
415 int open_files(struct thread_data *td)
421 for_each_file(td, f, i) {
422 err = td_io_open_file(td, f);
426 if (td->o.open_files == td->nr_open_files)
433 for_each_file(td, f, i)
434 td_io_close_file(td, f);
439 int setup_files(struct thread_data *td)
446 * if ioengine defines a setup() method, it's responsible for
447 * setting up everything in the td->files[] area.
449 if (td->io_ops->setup)
450 return td->io_ops->setup(td);
452 if (create_files(td))
455 err = open_files(td);
460 * Recalculate the total file size now that files are set up.
463 for_each_file(td, f, i)
464 td->o.size += f->file_size;
466 td->io_size = td->o.size;
467 if (td->io_size == 0) {
468 log_err("%s: no io blocks\n", td->o.name);
469 td_verror(td, EINVAL, "total_file_size");
473 if (!td->o.zone_size)
474 td->o.zone_size = td->io_size;
476 td->total_io_size = td->io_size * td->o.loops;
478 for_each_file(td, f, i)
479 td_io_close_file(td, f);
484 int init_random_map(struct thread_data *td)
486 int num_maps, blocks;
490 if (td->o.norandommap)
493 for_each_file(td, f, i) {
494 blocks = (f->real_file_size + td->o.rw_min_bs - 1) / td->o.rw_min_bs;
495 num_maps = (blocks + BLOCKS_PER_MAP-1)/ BLOCKS_PER_MAP;
496 f->file_map = malloc(num_maps * sizeof(long));
498 log_err("fio: failed allocating random map. If running a large number of jobs, try the 'norandommap' option\n");
501 f->num_maps = num_maps;
502 memset(f->file_map, 0, num_maps * sizeof(long));
508 void close_files(struct thread_data *td)
513 for_each_file(td, f, i) {
514 if (!f->file_name && (f->flags & FIO_FILE_UNLINK) &&
515 f->filetype == FIO_TYPE_FILE) {
516 unlink(f->file_name);
521 td_io_close_file(td, f);
527 td->o.filename = NULL;
532 static void get_file_type(struct fio_file *f)
536 f->filetype = FIO_TYPE_FILE;
538 if (!lstat(f->file_name, &sb)) {
539 f->flags |= FIO_FILE_EXISTS;
541 if (S_ISBLK(sb.st_mode))
542 f->filetype = FIO_TYPE_BD;
543 else if (S_ISCHR(sb.st_mode))
544 f->filetype = FIO_TYPE_CHAR;
547 * might as well do this here, and save a stat later on
549 f->real_file_size = sb.st_size;
550 f->file_size = f->real_file_size;
555 void add_file(struct thread_data *td, const char *fname)
557 int cur_files = td->files_index;
560 td->files = realloc(td->files, (cur_files + 1) * sizeof(*f));
562 f = &td->files[cur_files];
563 memset(f, 0, sizeof(*f));
565 f->file_name = strdup(fname);
570 if (f->filetype == FIO_TYPE_FILE)
571 td->nr_normal_files++;
574 void get_file(struct fio_file *f)
579 void put_file(struct thread_data *td, struct fio_file *f)
581 if (!(f->flags & FIO_FILE_OPEN))
584 assert(f->references);
588 if (should_fsync(td) && td->o.fsync_on_close)
591 if (td->io_ops->close_file)
592 td->io_ops->close_file(td, f);
594 f->flags &= ~FIO_FILE_OPEN;
597 static int recurse_dir(struct thread_data *td, const char *dirname)
603 D = opendir(dirname);
605 td_verror(td, errno, "opendir");
609 while ((dir = readdir(D)) != NULL) {
610 char full_path[PATH_MAX];
613 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
616 sprintf(full_path, "%s/%s", dirname, dir->d_name);
618 if (lstat(full_path, &sb) == -1) {
619 if (errno != ENOENT) {
620 td_verror(td, errno, "stat");
625 if (S_ISREG(sb.st_mode)) {
626 add_file(td, full_path);
631 if ((ret = recurse_dir(td, full_path)) != 0)
639 int add_dir_files(struct thread_data *td, const char *path)
641 return recurse_dir(td, path);