12 static int extend_file(struct thread_data *td, struct fio_file *f)
14 int r, new_layout = 0, unlink_file = 0, flags;
15 unsigned long long left;
20 * check if we need to lay the file out complete again. fio
21 * does that for operations involving reads, or for writes
22 * where overwrite is set
24 if (td_read(td) || (td_write(td) && td->o.overwrite))
26 if (td_write(td) && !td->o.overwrite)
29 if ((unlink_file || new_layout) && (f->flags & FIO_FILE_EXISTS)) {
30 if (unlink(f->file_name) < 0) {
31 td_verror(td, errno, "unlink");
36 flags = O_WRONLY | O_CREAT;
40 f->fd = open(f->file_name, flags, 0644);
42 td_verror(td, errno, "open");
46 if (ftruncate(f->fd, f->real_file_size) == -1) {
47 td_verror(td, errno, "ftruncate");
54 if (posix_fallocate(f->fd, 0, f->real_file_size) < 0) {
55 td_verror(td, errno, "posix_fallocate");
59 b = malloc(td->o.max_bs[DDIR_WRITE]);
60 memset(b, 0, td->o.max_bs[DDIR_WRITE]);
62 left = f->real_file_size;
63 while (left && !td->terminate) {
64 bs = td->o.max_bs[DDIR_WRITE];
68 r = write(f->fd, b, bs);
75 td_verror(td, errno, "write");
77 td_verror(td, EIO, "write");
85 else if (td->o.create_fsync)
99 static unsigned long long get_rand_file_size(struct thread_data *td)
101 unsigned long long ret;
104 r = os_random_long(&td->file_size_state);
105 ret = td->o.file_size_low + (unsigned long long) ((double) td->o.file_size_high * (r / (RAND_MAX + 1.0)));
106 ret -= (ret % td->o.rw_min_bs);
110 static int file_size(struct thread_data *td, struct fio_file *f)
114 if (fstat(f->fd, &st) == -1) {
115 td_verror(td, errno, "fstat");
119 f->real_file_size = st.st_size;
123 static int bdev_size(struct thread_data *td, struct fio_file *f)
125 unsigned long long bytes;
128 r = blockdev_size(f->fd, &bytes);
130 td_verror(td, r, "blockdev_size");
134 f->real_file_size = bytes;
138 static int get_file_size(struct thread_data *td, struct fio_file *f)
142 if (f->flags & FIO_SIZE_KNOWN)
145 if (f->filetype == FIO_TYPE_FILE)
146 ret = file_size(td, f);
147 else if (f->filetype == FIO_TYPE_BD)
148 ret = bdev_size(td, f);
150 f->real_file_size = -1;
155 if (f->file_offset > f->real_file_size) {
156 log_err("%s: offset extends end (%Lu > %Lu)\n", td->o.name, f->file_offset, f->real_file_size);
160 f->flags |= FIO_SIZE_KNOWN;
164 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
172 * FIXME: add blockdev flushing too
175 ret = madvise(f->mmap, f->io_size, MADV_DONTNEED);
176 else if (f->filetype == FIO_TYPE_FILE)
177 ret = fadvise(f->fd, f->file_offset, f->io_size, POSIX_FADV_DONTNEED);
178 else if (f->filetype == FIO_TYPE_BD) {
179 ret = blockdev_invalidate_cache(f->fd);
180 if (ret < 0 && errno == EACCES && geteuid()) {
181 log_err("fio: only root may flush block devices. Cache flush bypassed!\n");
184 } else if (f->filetype == FIO_TYPE_CHAR)
188 td_verror(td, errno, "invalidate_cache");
195 void generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
201 int generic_open_file(struct thread_data *td, struct fio_file *f)
206 flags |= OS_O_DIRECT;
210 if (td_write(td) || td_rw(td)) {
213 if (f->filetype == FIO_TYPE_FILE)
216 f->fd = open(f->file_name, flags, 0600);
218 if (f->filetype == FIO_TYPE_CHAR)
223 f->fd = open(f->file_name, flags);
227 char buf[FIO_VERROR_SIZE];
230 snprintf(buf, sizeof(buf) - 1, "open(%s)", f->file_name);
232 td_verror(td, __e, buf);
235 if (get_file_size(td, f))
244 int open_files(struct thread_data *td)
250 for_each_file(td, f, i) {
251 err = td_io_open_file(td, f);
253 if (td->error == EMFILE) {
254 log_err("fio: limited open files to: %d\n", td->nr_open_files);
255 td->o.open_files = td->nr_open_files;
262 if (td->o.open_files == td->nr_open_files)
269 for_each_file(td, f, i)
270 td_io_close_file(td, f);
276 * open/close all files, so that ->real_file_size gets set
278 static int get_file_sizes(struct thread_data *td)
284 for_each_file(td, f, i) {
285 if (td->io_ops->open_file(td, f)) {
286 log_err("%s\n", td->verror);
290 td->io_ops->close_file(td, f);
292 if (f->real_file_size == -1ULL && td->o.size)
293 f->real_file_size = td->o.size / td->o.nr_files;
300 * Open the files and setup files sizes, creating files if necessary.
302 int setup_files(struct thread_data *td)
304 unsigned long long total_size, extend_size;
307 int err = 0, need_extend;
310 * if ioengine defines a setup() method, it's responsible for
311 * opening the files and setting f->real_file_size to indicate
312 * the valid range for that file.
314 if (td->io_ops->setup)
315 err = td->io_ops->setup(td);
317 err = get_file_sizes(td);
323 * check sizes. if the files/devices do not exist and the size
324 * isn't passed to fio, abort.
327 for_each_file(td, f, i) {
328 if (f->real_file_size == -1ULL)
331 total_size += f->real_file_size;
335 * device/file sizes are zero and no size given, punt
337 if ((!total_size || total_size == -1ULL) && !td->o.size) {
338 log_err("%s: you need to specify size=\n", td->o.name);
339 td_verror(td, EINVAL, "total_file_size");
344 * now file sizes are known, so we can set ->io_size. if size= is
345 * not given, ->io_size is just equal to ->real_file_size. if size
346 * is given, ->io_size is size / nr_files.
348 extend_size = total_size = 0;
350 for_each_file(td, f, i) {
351 if (!td->o.file_size_low) {
353 * no file size range given, file size is equal to
354 * total size divided by number of files. if that is
355 * zero, set it to the real file size.
357 f->io_size = td->o.size / td->o.nr_files;
359 f->io_size = f->real_file_size;
360 } else if (f->real_file_size < td->o.file_size_low ||
361 f->real_file_size > td->o.file_size_high) {
363 * file size given. if it's fixed, use that. if it's a
364 * range, generate a random size in-between.
366 if (td->o.file_size_low == td->o.file_size_high)
367 f->io_size = td->o.file_size_low;
369 f->io_size = get_rand_file_size(td);
371 f->io_size = f->real_file_size;
373 if (f->io_size == -1ULL)
376 total_size += f->io_size;
378 if (f->filetype == FIO_TYPE_FILE &&
379 f->io_size > f->real_file_size &&
380 !(td->io_ops->flags & FIO_DISKLESSIO)) {
382 extend_size += f->io_size;
383 f->flags |= FIO_FILE_EXTEND;
388 td->o.size = total_size;
391 * See if we need to extend some files
395 log_info("%s: Laying out IO file(s) (%u files / %LuMiB)\n",
396 td->o.name, need_extend, extend_size >> 20);
398 for_each_file(td, f, i) {
399 if (!(f->flags & FIO_FILE_EXTEND))
402 assert(f->filetype == FIO_TYPE_FILE);
403 f->flags &= ~FIO_FILE_EXTEND;
404 f->real_file_size = f->io_size;
405 err = extend_file(td, f);
415 if (!td->o.zone_size)
416 td->o.zone_size = td->o.size;
418 td->total_io_size = td->o.size * td->o.loops;
422 int init_random_map(struct thread_data *td)
424 int num_maps, blocks;
428 if (td->o.norandommap)
431 for_each_file(td, f, i) {
432 blocks = (f->real_file_size + td->o.rw_min_bs - 1) / td->o.rw_min_bs;
433 num_maps = (blocks + BLOCKS_PER_MAP-1)/ BLOCKS_PER_MAP;
434 f->file_map = malloc(num_maps * sizeof(long));
436 log_err("fio: failed allocating random map. If running a large number of jobs, try the 'norandommap' option\n");
439 f->num_maps = num_maps;
440 memset(f->file_map, 0, num_maps * sizeof(long));
446 void close_files(struct thread_data *td)
451 for_each_file(td, f, i) {
452 if ((f->flags & FIO_FILE_UNLINK) &&
453 f->filetype == FIO_TYPE_FILE)
454 unlink(f->file_name);
456 td_io_close_file(td, f);
467 td->o.filename = NULL;
473 static void get_file_type(struct fio_file *f)
477 f->filetype = FIO_TYPE_FILE;
479 if (!lstat(f->file_name, &sb)) {
480 if (S_ISBLK(sb.st_mode))
481 f->filetype = FIO_TYPE_BD;
482 else if (S_ISCHR(sb.st_mode))
483 f->filetype = FIO_TYPE_CHAR;
487 void add_file(struct thread_data *td, const char *fname)
489 int cur_files = td->files_index;
490 char file_name[PATH_MAX];
494 td->files = realloc(td->files, (cur_files + 1) * sizeof(*f));
496 f = &td->files[cur_files];
497 memset(f, 0, sizeof(*f));
501 len = sprintf(file_name, "%s/", td->o.directory);
503 sprintf(file_name + len, "%s", fname);
504 f->file_name = strdup(file_name);
509 if (f->filetype == FIO_TYPE_FILE)
510 td->nr_normal_files++;
513 void get_file(struct fio_file *f)
518 void put_file(struct thread_data *td, struct fio_file *f)
520 if (!(f->flags & FIO_FILE_OPEN))
523 assert(f->references);
527 if (should_fsync(td) && td->o.fsync_on_close)
530 if (td->io_ops->close_file)
531 td->io_ops->close_file(td, f);
534 f->flags &= ~FIO_FILE_OPEN;
537 static int recurse_dir(struct thread_data *td, const char *dirname)
543 D = opendir(dirname);
545 char buf[FIO_VERROR_SIZE];
547 snprintf(buf, FIO_VERROR_SIZE - 1, "opendir(%s)", dirname);
548 td_verror(td, errno, buf);
552 while ((dir = readdir(D)) != NULL) {
553 char full_path[PATH_MAX];
556 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
559 sprintf(full_path, "%s/%s", dirname, dir->d_name);
561 if (lstat(full_path, &sb) == -1) {
562 if (errno != ENOENT) {
563 td_verror(td, errno, "stat");
568 if (S_ISREG(sb.st_mode)) {
569 add_file(td, full_path);
573 if (!S_ISDIR(sb.st_mode))
576 if ((ret = recurse_dir(td, full_path)) != 0)
584 int add_dir_files(struct thread_data *td, const char *path)
586 int ret = recurse_dir(td, path);
589 log_info("fio: opendir added %d files\n", td->o.nr_files);
594 void dup_files(struct thread_data *td, struct thread_data *org)
603 bytes = org->files_index * sizeof(*f);
604 td->files = malloc(bytes);
605 memcpy(td->files, org->files, bytes);
607 for_each_file(td, f, i) {
609 f->file_name = strdup(f->file_name);