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 static int file_lookup_open(struct fio_file *f, int flags)
231 struct fio_file *__f;
234 __f = lookup_file_hash(f->file_name);
236 dprint(FD_FILE, "found file in hash %s\n", f->file_name);
238 * racy, need the __f->lock locked
241 f->lock_owner = __f->lock_owner;
242 f->lock_batch = __f->lock_batch;
243 f->lock_ddir = __f->lock_ddir;
244 f->fd = dup(__f->fd);
248 dprint(FD_FILE, "file not found in hash %s\n", f->file_name);
249 f->fd = open(f->file_name, flags, 0600);
256 int generic_open_file(struct thread_data *td, struct fio_file *f)
262 dprint(FD_FILE, "fd open %s\n", f->file_name);
264 if (!strcmp(f->file_name, "-")) {
266 log_err("fio: can't read/write to stdin/out\n");
272 * move output logging to stderr, if we are writing to stdout
279 flags |= OS_O_DIRECT;
282 if (f->filetype != FIO_TYPE_FILE)
291 if (f->filetype == FIO_TYPE_FILE)
295 f->fd = dup(STDOUT_FILENO);
297 from_hash = file_lookup_open(f, flags);
299 if (f->filetype == FIO_TYPE_CHAR && !read_only)
305 f->fd = dup(STDIN_FILENO);
307 from_hash = file_lookup_open(f, flags);
311 char buf[FIO_VERROR_SIZE];
314 if (errno == EPERM && (flags & O_NOATIME)) {
319 snprintf(buf, sizeof(buf) - 1, "open(%s)", f->file_name);
321 td_verror(td, __e, buf);
324 if (get_file_size(td, f))
327 if (!from_hash && f->fd != -1) {
328 if (add_file_hash(f)) {
332 * OK to ignore, we haven't done anything with it
334 ret = generic_close_file(td, f);
345 int open_files(struct thread_data *td)
351 dprint(FD_FILE, "open files\n");
353 for_each_file(td, f, i) {
354 err = td_io_open_file(td, f);
356 if (td->error == EMFILE) {
357 log_err("fio: limited open files to: %d\n", td->nr_open_files);
358 td->o.open_files = td->nr_open_files;
365 if (td->o.open_files == td->nr_open_files)
372 for_each_file(td, f, i)
373 td_io_close_file(td, f);
379 * open/close all files, so that ->real_file_size gets set
381 static int get_file_sizes(struct thread_data *td)
387 for_each_file(td, f, i) {
388 dprint(FD_FILE, "get file size for %p/%d/%p\n", f, i, f->file_name);
390 if (td->io_ops->open_file(td, f)) {
391 if (td->error != ENOENT) {
392 log_err("%s\n", td->verror);
397 if (td->io_ops->close_file)
398 td->io_ops->close_file(td, f);
401 if (f->real_file_size == -1ULL && td->o.size)
402 f->real_file_size = td->o.size / td->o.nr_files;
409 * Open the files and setup files sizes, creating files if necessary.
411 int setup_files(struct thread_data *td)
413 unsigned long long total_size, extend_size;
416 int err = 0, need_extend;
418 dprint(FD_FILE, "setup files\n");
421 * if ioengine defines a setup() method, it's responsible for
422 * opening the files and setting f->real_file_size to indicate
423 * the valid range for that file.
425 if (td->io_ops->setup)
426 err = td->io_ops->setup(td);
428 err = get_file_sizes(td);
434 * check sizes. if the files/devices do not exist and the size
435 * isn't passed to fio, abort.
438 for_each_file(td, f, i) {
439 if (f->real_file_size == -1ULL)
442 total_size += f->real_file_size;
446 * device/file sizes are zero and no size given, punt
448 if ((!total_size || total_size == -1ULL) && !td->o.size &&
449 !(td->io_ops->flags & FIO_NOIO) && !td->o.fill_device) {
450 log_err("%s: you need to specify size=\n", td->o.name);
451 td_verror(td, EINVAL, "total_file_size");
456 * now file sizes are known, so we can set ->io_size. if size= is
457 * not given, ->io_size is just equal to ->real_file_size. if size
458 * is given, ->io_size is size / nr_files.
460 extend_size = total_size = 0;
462 for_each_file(td, f, i) {
463 f->file_offset = td->o.start_offset;
465 if (!td->o.file_size_low) {
467 * no file size range given, file size is equal to
468 * total size divided by number of files. if that is
469 * zero, set it to the real file size.
471 f->io_size = td->o.size / td->o.nr_files;
473 f->io_size = f->real_file_size - f->file_offset;
474 } else if (f->real_file_size < td->o.file_size_low ||
475 f->real_file_size > td->o.file_size_high) {
476 if (f->file_offset > td->o.file_size_low)
479 * file size given. if it's fixed, use that. if it's a
480 * range, generate a random size in-between.
482 if (td->o.file_size_low == td->o.file_size_high)
483 f->io_size = td->o.file_size_low - f->file_offset;
485 f->io_size = get_rand_file_size(td) - f->file_offset;
487 f->io_size = f->real_file_size - f->file_offset;
489 if (f->io_size == -1ULL)
492 total_size += f->io_size;
494 if (f->filetype == FIO_TYPE_FILE &&
495 (f->io_size + f->file_offset) > f->real_file_size &&
496 !(td->io_ops->flags & FIO_DISKLESSIO)) {
498 extend_size += (f->io_size + f->file_offset);
499 f->flags |= FIO_FILE_EXTEND;
503 if (!td->o.size || td->o.size > total_size)
504 td->o.size = total_size;
507 * See if we need to extend some files
511 log_info("%s: Laying out IO file(s) (%u file(s) / %LuMiB)\n",
512 td->o.name, need_extend, extend_size >> 20);
514 for_each_file(td, f, i) {
515 if (!(f->flags & FIO_FILE_EXTEND))
518 assert(f->filetype == FIO_TYPE_FILE);
519 f->flags &= ~FIO_FILE_EXTEND;
520 f->real_file_size = (f->io_size + f->file_offset);
521 err = extend_file(td, f);
531 if (!td->o.zone_size)
532 td->o.zone_size = td->o.size;
535 * iolog already set the total io size, if we read back
538 if (!td->o.read_iolog_file)
539 td->total_io_size = td->o.size * td->o.loops;
542 log_err("%s: you need to specify valid offset=\n", td->o.name);
546 int init_random_map(struct thread_data *td)
548 unsigned long long blocks, num_maps;
552 if (td->o.norandommap || !td_random(td))
555 for_each_file(td, f, i) {
556 blocks = (f->real_file_size + td->o.rw_min_bs - 1) / (unsigned long long) td->o.rw_min_bs;
557 num_maps = (blocks + BLOCKS_PER_MAP-1)/ (unsigned long long) BLOCKS_PER_MAP;
558 f->file_map = smalloc(num_maps * sizeof(long));
560 log_err("fio: failed allocating random map. If running a large number of jobs, try the 'norandommap' option\n");
563 f->num_maps = num_maps;
569 void close_files(struct thread_data *td)
574 for_each_file(td, f, i)
575 td_io_close_file(td, f);
578 void close_and_free_files(struct thread_data *td)
583 dprint(FD_FILE, "close files\n");
585 for_each_file(td, f, i) {
586 if (td->o.unlink && f->filetype == FIO_TYPE_FILE)
587 unlink(f->file_name);
589 td_io_close_file(td, f);
601 td->o.filename = NULL;
608 static void get_file_type(struct fio_file *f)
612 if (!strcmp(f->file_name, "-"))
613 f->filetype = FIO_TYPE_PIPE;
615 f->filetype = FIO_TYPE_FILE;
617 if (!lstat(f->file_name, &sb)) {
618 if (S_ISBLK(sb.st_mode))
619 f->filetype = FIO_TYPE_BD;
620 else if (S_ISCHR(sb.st_mode))
621 f->filetype = FIO_TYPE_CHAR;
622 else if (S_ISFIFO(sb.st_mode))
623 f->filetype = FIO_TYPE_PIPE;
627 int add_file(struct thread_data *td, const char *fname)
629 int cur_files = td->files_index;
630 char file_name[PATH_MAX];
634 dprint(FD_FILE, "add file %s\n", fname);
636 f = smalloc(sizeof(*f));
639 dprint(FD_FILE, "resize file array to %d files\n", cur_files + 1);
641 td->files = realloc(td->files, (cur_files + 1) * sizeof(f));
642 td->files[cur_files] = f;
645 * init function, io engine may not be loaded yet
647 if (td->io_ops && (td->io_ops->flags & FIO_DISKLESSIO))
648 f->real_file_size = -1ULL;
651 len = sprintf(file_name, "%s/", td->o.directory);
653 sprintf(file_name + len, "%s", fname);
654 f->file_name = smalloc_strdup(file_name);
658 switch (td->o.file_lock_mode) {
661 case FILE_LOCK_READWRITE:
662 f->lock = fio_mutex_rw_init();
664 case FILE_LOCK_EXCLUSIVE:
665 f->lock = fio_mutex_init(1);
668 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
673 if (f->filetype == FIO_TYPE_FILE)
674 td->nr_normal_files++;
676 dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name, cur_files);
681 void get_file(struct fio_file *f)
683 dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
684 assert(f->flags & FIO_FILE_OPEN);
688 int put_file(struct thread_data *td, struct fio_file *f)
692 dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
694 if (!(f->flags & FIO_FILE_OPEN))
697 assert(f->references);
701 if (should_fsync(td) && td->o.fsync_on_close)
704 if (td->io_ops->close_file)
705 ret = td->io_ops->close_file(td, f);
708 f->flags &= ~FIO_FILE_OPEN;
712 void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
714 if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
717 if (f->lock_owner == td && f->lock_batch--)
720 if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
721 if (ddir == DDIR_READ)
722 fio_mutex_down_read(f->lock);
724 fio_mutex_down_write(f->lock);
725 } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
726 fio_mutex_down(f->lock);
729 f->lock_batch = td->o.lockfile_batch;
733 void unlock_file(struct thread_data *td, struct fio_file *f)
735 if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
740 if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
741 const int is_read = f->lock_ddir == DDIR_READ;
742 int val = fio_mutex_getval(f->lock);
744 if ((is_read && val == 1) || (!is_read && val == -1))
745 f->lock_owner = NULL;
748 fio_mutex_up_read(f->lock);
750 fio_mutex_up_write(f->lock);
751 } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE) {
752 int val = fio_mutex_getval(f->lock);
755 f->lock_owner = NULL;
757 fio_mutex_up(f->lock);
761 void unlock_file_all(struct thread_data *td, struct fio_file *f)
763 if (f->lock_owner != td)
770 static int recurse_dir(struct thread_data *td, const char *dirname)
776 D = opendir(dirname);
778 char buf[FIO_VERROR_SIZE];
780 snprintf(buf, FIO_VERROR_SIZE - 1, "opendir(%s)", dirname);
781 td_verror(td, errno, buf);
785 while ((dir = readdir(D)) != NULL) {
786 char full_path[PATH_MAX];
789 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
792 sprintf(full_path, "%s/%s", dirname, dir->d_name);
794 if (lstat(full_path, &sb) == -1) {
795 if (errno != ENOENT) {
796 td_verror(td, errno, "stat");
801 if (S_ISREG(sb.st_mode)) {
802 add_file(td, full_path);
806 if (!S_ISDIR(sb.st_mode))
809 if ((ret = recurse_dir(td, full_path)) != 0)
817 int add_dir_files(struct thread_data *td, const char *path)
819 int ret = recurse_dir(td, path);
822 log_info("fio: opendir added %d files\n", td->o.nr_files);
827 void dup_files(struct thread_data *td, struct thread_data *org)
832 dprint(FD_FILE, "dup files: %d\n", org->files_index);
837 td->files = malloc(org->files_index * sizeof(f));
839 for_each_file(org, f, i) {
840 struct fio_file *__f;
842 __f = smalloc(sizeof(*__f));
845 __f->file_name = smalloc_strdup(f->file_name);
852 * Returns the index that matches the filename, or -1 if not there
854 int get_fileno(struct thread_data *td, const char *fname)
859 for_each_file(td, f, i)
860 if (!strcmp(f->file_name, fname))
867 * For log usage, where we add/open/close files automatically
869 void free_release_files(struct thread_data *td)
873 td->nr_normal_files = 0;