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->max_bs[DDIR_WRITE]);
62 memset(b, 0, td->max_bs[DDIR_WRITE]);
65 while (left && !td->terminate) {
66 bs = td->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->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->file_size_high)
108 upper = td->file_size_high;
109 else if (upper < td->file_size_low)
114 r = os_random_long(&td->file_size_state);
115 ret = td->file_size_low + (unsigned long long) ((double) upper * (r / (RAND_MAX + 1.0)));
116 ret -= (ret % td->rw_min_bs);
122 static int create_files(struct thread_data *td)
125 int err, need_create, can_extend;
126 unsigned long long total_file_size, local_file_size;
127 unsigned int i, new_files;
130 total_file_size = td->total_file_size;
131 for_each_file(td, f, i) {
132 unsigned long long s;
134 f->file_offset = td->start_offset;
136 if (f->filetype != FIO_TYPE_FILE)
139 if (f->flags & FIO_FILE_EXISTS) {
141 if (s > total_file_size)
144 total_file_size -= s;
150 * unless specifically asked for overwrite, let normal io extend it
152 can_extend = !td->overwrite && !(td->io_ops->flags & FIO_NOEXTEND);
157 local_file_size = total_file_size;
158 if (!local_file_size)
159 local_file_size = -1;
161 for_each_file(td, f, i) {
164 if (f->filetype != FIO_TYPE_FILE)
166 if (f->flags & FIO_FILE_EXISTS)
169 if (!td->file_size_low)
170 f->file_size = total_file_size / new_files;
173 * If we don't have enough space left for a file
174 * of the minimum size, bail.
176 if (local_file_size < td->file_size_low) {
177 log_info("fio: limited to %d files\n", i);
178 new_files -= (td->nr_files - i);
183 f->file_size = set_rand_file_size(td, local_file_size);
184 local_file_size -= f->file_size;
187 file_there = !file_ok(td, f);
189 if (file_there && td_write(td) && !td->overwrite) {
190 unlink(f->file_name);
194 need_create += !file_there;
200 if (!td->total_file_size) {
201 log_err("Need size for create\n");
202 td_verror(td, EINVAL, "file_size");
207 log_info("%s: Laying out IO file(s) (%u files / %LuMiB)\n",
208 td->name, new_files, total_file_size >> 20);
211 for_each_file(td, f, i) {
213 * Only unlink files that we created.
215 f->flags &= ~FIO_FILE_UNLINK;
216 if (file_ok(td, f)) {
218 f->flags |= FIO_FILE_UNLINK;
220 err = create_file(td, f);
230 static int file_size(struct thread_data *td, struct fio_file *f)
235 if (fstat(f->fd, &st) == -1) {
236 td_verror(td, errno, "fstat");
240 f->real_file_size = st.st_size;
242 if (!f->file_size || f->file_size > f->real_file_size)
243 f->file_size = f->real_file_size;
245 f->real_file_size = f->file_size;
250 static int bdev_size(struct thread_data *td, struct fio_file *f)
252 unsigned long long bytes;
255 r = blockdev_size(f->fd, &bytes);
257 td_verror(td, r, "blockdev_size");
261 f->real_file_size = bytes;
264 * no extend possibilities, so limit size to device size if too large
266 if (!f->file_size || f->file_size > f->real_file_size)
267 f->file_size = f->real_file_size;
269 f->file_size -= f->file_offset;
273 static int get_file_size(struct thread_data *td, struct fio_file *f)
277 if (f->filetype == FIO_TYPE_FILE) {
278 if (!(f->flags & FIO_FILE_EXISTS))
279 ret = file_size(td, f);
280 } else if (f->filetype == FIO_TYPE_BD)
281 ret = bdev_size(td, f);
283 f->real_file_size = -1;
288 if (f->file_offset > f->real_file_size) {
289 log_err("%s: offset extends end (%Lu > %Lu)\n", td->name, f->file_offset, f->real_file_size);
296 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
304 * FIXME: add blockdev flushing too
307 ret = madvise(f->mmap, f->file_size, MADV_DONTNEED);
308 else if (f->filetype == FIO_TYPE_FILE) {
309 ret = fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_DONTNEED);
310 } else if (f->filetype == FIO_TYPE_BD) {
311 ret = blockdev_invalidate_cache(f->fd);
312 } else if (f->filetype == FIO_TYPE_CHAR)
316 td_verror(td, errno, "invalidate_cache");
323 void generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
329 int generic_open_file(struct thread_data *td, struct fio_file *f)
334 flags |= OS_O_DIRECT;
338 if (td_write(td) || td_rw(td)) {
341 if (f->filetype == FIO_TYPE_FILE)
344 f->fd = open(f->file_name, flags, 0600);
346 if (f->filetype == FIO_TYPE_CHAR)
351 f->fd = open(f->file_name, flags);
357 td_verror(td, __e, "open");
358 if (__e == EINVAL && td->odirect)
359 log_err("fio: destination does not support O_DIRECT\n");
361 log_err("fio: try reducing/setting openfiles (failed at %u of %u)\n", td->nr_open_files, td->nr_files);
365 if (get_file_size(td, f))
368 if (td->invalidate_cache && file_invalidate_cache(td, f))
371 if (!td_random(td)) {
372 if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_SEQUENTIAL) < 0) {
373 td_verror(td, errno, "fadvise");
377 if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_RANDOM) < 0) {
378 td_verror(td, errno, "fadvise");
389 int open_files(struct thread_data *td)
395 for_each_file(td, f, i) {
396 err = td_io_open_file(td, f);
400 if (td->open_files == td->nr_open_files)
407 for_each_file(td, f, i)
408 td_io_close_file(td, f);
413 int setup_files(struct thread_data *td)
420 * if ioengine defines a setup() method, it's responsible for
421 * setting up everything in the td->files[] area.
423 if (td->io_ops->setup)
424 return td->io_ops->setup(td);
426 if (create_files(td))
429 err = open_files(td);
434 * Recalculate the total file size now that files are set up.
436 td->total_file_size = 0;
437 for_each_file(td, f, i)
438 td->total_file_size += f->file_size;
440 td->io_size = td->total_file_size;
441 if (td->io_size == 0) {
442 log_err("%s: no io blocks\n", td->name);
443 td_verror(td, EINVAL, "total_file_size");
448 td->zone_size = td->io_size;
450 td->total_io_size = td->io_size * td->loops;
452 for_each_file(td, f, i)
453 td_io_close_file(td, f);
458 void close_files(struct thread_data *td)
463 for_each_file(td, f, i) {
464 if (!f->file_name && (f->flags & FIO_FILE_UNLINK) &&
465 f->filetype == FIO_TYPE_FILE) {
466 unlink(f->file_name);
471 td_io_close_file(td, f);
482 static void get_file_type(struct fio_file *f)
486 f->filetype = FIO_TYPE_FILE;
488 if (!lstat(f->file_name, &sb)) {
489 f->flags |= FIO_FILE_EXISTS;
491 if (S_ISBLK(sb.st_mode))
492 f->filetype = FIO_TYPE_BD;
493 else if (S_ISCHR(sb.st_mode))
494 f->filetype = FIO_TYPE_CHAR;
497 * might as well do this here, and save a stat later on
499 f->real_file_size = sb.st_size;
500 f->file_size = f->real_file_size;
505 void add_file(struct thread_data *td, const char *fname)
507 int cur_files = td->files_index;
510 td->files = realloc(td->files, (cur_files + 1) * sizeof(*f));
512 f = &td->files[cur_files];
513 memset(f, 0, sizeof(*f));
515 f->file_name = strdup(fname);
520 if (f->filetype == FIO_TYPE_FILE)
521 td->nr_normal_files++;
524 void get_file(struct fio_file *f)
529 void put_file(struct thread_data *td, struct fio_file *f)
531 if (!(f->flags & FIO_FILE_OPEN))
534 assert(f->references);
538 if (should_fsync(td) && td->fsync_on_close)
541 if (td->io_ops->close_file)
542 td->io_ops->close_file(td, f);
544 f->flags &= ~FIO_FILE_OPEN;
547 static int recurse_dir(struct thread_data *td, const char *dirname)
553 D = opendir(dirname);
555 td_verror(td, errno, "opendir");
559 while ((dir = readdir(D)) != NULL) {
560 char full_path[PATH_MAX];
563 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
566 sprintf(full_path, "%s/%s", dirname, dir->d_name);
568 if (lstat(full_path, &sb) == -1) {
569 if (errno != ENOENT) {
570 td_verror(td, errno, "stat");
575 if (S_ISREG(sb.st_mode)) {
576 add_file(td, full_path);
581 if ((ret = recurse_dir(td, full_path)) != 0)
589 int add_dir_files(struct thread_data *td, const char *path)
591 return recurse_dir(td, path);