17 * Leaves f->fd open on success, caller must close
19 static int extend_file(struct thread_data *td, struct fio_file *f)
21 int r, new_layout = 0, unlink_file = 0, flags;
22 unsigned long long left;
27 log_err("fio: refusing extend of file due to read-only\n");
32 * check if we need to lay the file out complete again. fio
33 * does that for operations involving reads, or for writes
34 * where overwrite is set
36 if (td_read(td) || (td_write(td) && td->o.overwrite))
38 if (td_write(td) && !td->o.overwrite)
41 if (unlink_file || new_layout) {
42 if ((unlink(f->file_name) < 0) && (errno != ENOENT)) {
43 td_verror(td, errno, "unlink");
48 flags = O_WRONLY | O_CREAT;
52 dprint(FD_FILE, "open file %s, flags %x\n", f->file_name, flags);
53 f->fd = open(f->file_name, flags, 0644);
55 td_verror(td, errno, "open");
62 dprint(FD_FILE, "truncate file %s, size %llu\n", f->file_name,
64 if (ftruncate(f->fd, f->real_file_size) == -1) {
65 td_verror(td, errno, "ftruncate");
69 dprint(FD_FILE, "fallocate file %s, size %llu\n", f->file_name,
71 if (posix_fallocate(f->fd, 0, f->real_file_size) < 0) {
72 td_verror(td, errno, "posix_fallocate");
76 b = malloc(td->o.max_bs[DDIR_WRITE]);
77 memset(b, 0, td->o.max_bs[DDIR_WRITE]);
79 left = f->real_file_size;
80 while (left && !td->terminate) {
81 bs = td->o.max_bs[DDIR_WRITE];
85 r = write(f->fd, b, bs);
92 td_verror(td, errno, "write");
94 td_verror(td, EIO, "write");
101 unlink(f->file_name);
102 else if (td->o.create_fsync) {
103 if (fsync(f->fd) < 0) {
104 td_verror(td, errno, "fsync");
118 static unsigned long long get_rand_file_size(struct thread_data *td)
120 unsigned long long ret, size_d;
123 r = os_random_long(&td->file_size_state);
124 size_d = td->o.file_size_high - td->o.file_size_low;
125 ret = (unsigned long long) ((double) size_d * (r / (RAND_MAX + 1.0)));
126 ret += td->o.file_size_low;
127 ret -= (ret % td->o.rw_min_bs);
131 static int file_size(struct thread_data *td, struct fio_file *f)
135 if (fstat(f->fd, &st) == -1) {
136 td_verror(td, errno, "fstat");
140 f->real_file_size = st.st_size;
144 static int bdev_size(struct thread_data *td, struct fio_file *f)
146 unsigned long long bytes;
149 r = blockdev_size(f->fd, &bytes);
151 td_verror(td, r, "blockdev_size");
155 f->real_file_size = bytes;
159 static int get_file_size(struct thread_data *td, struct fio_file *f)
163 if (f->flags & FIO_SIZE_KNOWN)
166 if (f->filetype == FIO_TYPE_FILE)
167 ret = file_size(td, f);
168 else if (f->filetype == FIO_TYPE_BD)
169 ret = bdev_size(td, f);
171 f->real_file_size = -1;
176 if (f->file_offset > f->real_file_size) {
177 log_err("%s: offset extends end (%Lu > %Lu)\n", td->o.name,
178 f->file_offset, f->real_file_size);
182 f->flags |= FIO_SIZE_KNOWN;
186 static int __file_invalidate_cache(struct thread_data *td, struct fio_file *f,
187 unsigned long long off,
188 unsigned long long len)
195 off = f->file_offset;
197 dprint(FD_IO, "invalidate cache %s: %llu/%llu\n", f->file_name, off,
201 * FIXME: add blockdev flushing too
204 ret = madvise(f->mmap, len, MADV_DONTNEED);
205 else if (f->filetype == FIO_TYPE_FILE) {
206 ret = fadvise(f->fd, off, len, POSIX_FADV_DONTNEED);
207 } else if (f->filetype == FIO_TYPE_BD) {
208 ret = blockdev_invalidate_cache(f->fd);
209 if (ret < 0 && errno == EACCES && geteuid()) {
211 log_err("fio: only root may flush block "
212 "devices. Cache flush bypassed!\n");
217 } else if (f->filetype == FIO_TYPE_CHAR || f->filetype == FIO_TYPE_PIPE)
221 td_verror(td, errno, "invalidate_cache");
223 } else if (ret > 0) {
224 td_verror(td, ret, "invalidate_cache");
232 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
234 return __file_invalidate_cache(td, f, -1, -1);
237 int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
241 dprint(FD_FILE, "fd close %s\n", f->file_name);
245 if (close(f->fd) < 0)
252 static int file_lookup_open(struct fio_file *f, int flags)
254 struct fio_file *__f;
257 __f = lookup_file_hash(f->file_name);
259 dprint(FD_FILE, "found file in hash %s\n", f->file_name);
261 * racy, need the __f->lock locked
264 f->lock_owner = __f->lock_owner;
265 f->lock_batch = __f->lock_batch;
266 f->lock_ddir = __f->lock_ddir;
269 dprint(FD_FILE, "file not found in hash %s\n", f->file_name);
273 f->fd = open(f->file_name, flags, 0600);
277 int generic_open_file(struct thread_data *td, struct fio_file *f)
283 dprint(FD_FILE, "fd open %s\n", f->file_name);
285 if (!strcmp(f->file_name, "-")) {
287 log_err("fio: can't read/write to stdin/out\n");
293 * move output logging to stderr, if we are writing to stdout
300 flags |= OS_O_DIRECT;
303 if (f->filetype != FIO_TYPE_FILE)
311 if (f->filetype == FIO_TYPE_FILE)
315 f->fd = dup(STDOUT_FILENO);
317 from_hash = file_lookup_open(f, flags);
319 if (f->filetype == FIO_TYPE_CHAR && !read_only)
325 f->fd = dup(STDIN_FILENO);
327 from_hash = file_lookup_open(f, flags);
331 char buf[FIO_VERROR_SIZE];
334 if (errno == EPERM && (flags & O_NOATIME)) {
339 snprintf(buf, sizeof(buf) - 1, "open(%s)", f->file_name);
341 td_verror(td, __e, buf);
344 if (get_file_size(td, f))
347 if (!from_hash && f->fd != -1) {
348 if (add_file_hash(f)) {
352 * OK to ignore, we haven't done anything with it
354 ret = generic_close_file(td, f);
365 int open_files(struct thread_data *td)
371 dprint(FD_FILE, "open files\n");
373 for_each_file(td, f, i) {
374 err = td_io_open_file(td, f);
376 if (td->error == EMFILE) {
377 log_err("fio: limited open files to: %d\n",
379 td->o.open_files = td->nr_open_files;
386 if (td->o.open_files == td->nr_open_files)
393 for_each_file(td, f, i)
394 td_io_close_file(td, f);
400 * open/close all files, so that ->real_file_size gets set
402 static int get_file_sizes(struct thread_data *td)
408 for_each_file(td, f, i) {
409 dprint(FD_FILE, "get file size for %p/%d/%p\n", f, i,
412 if (td->io_ops->open_file(td, f)) {
413 if (td->error != ENOENT) {
414 log_err("%s\n", td->verror);
419 if (td->io_ops->close_file)
420 td->io_ops->close_file(td, f);
423 if (f->real_file_size == -1ULL && td->o.size)
424 f->real_file_size = td->o.size / td->o.nr_files;
431 * Open the files and setup files sizes, creating files if necessary.
433 int setup_files(struct thread_data *td)
435 unsigned long long total_size, extend_size;
438 int err = 0, need_extend;
440 dprint(FD_FILE, "setup files\n");
442 if (td->o.read_iolog_file)
446 * if ioengine defines a setup() method, it's responsible for
447 * opening the files and setting f->real_file_size to indicate
448 * the valid range for that file.
450 if (td->io_ops->setup)
451 err = td->io_ops->setup(td);
453 err = get_file_sizes(td);
459 * check sizes. if the files/devices do not exist and the size
460 * isn't passed to fio, abort.
463 for_each_file(td, f, i) {
464 if (f->real_file_size == -1ULL)
467 total_size += f->real_file_size;
471 * device/file sizes are zero and no size given, punt
473 if ((!total_size || total_size == -1ULL) && !td->o.size &&
474 !(td->io_ops->flags & FIO_NOIO) && !td->o.fill_device) {
475 log_err("%s: you need to specify size=\n", td->o.name);
476 td_verror(td, EINVAL, "total_file_size");
481 * now file sizes are known, so we can set ->io_size. if size= is
482 * not given, ->io_size is just equal to ->real_file_size. if size
483 * is given, ->io_size is size / nr_files.
485 extend_size = total_size = 0;
487 for_each_file(td, f, i) {
488 f->file_offset = td->o.start_offset;
490 if (!td->o.file_size_low) {
492 * no file size range given, file size is equal to
493 * total size divided by number of files. if that is
494 * zero, set it to the real file size.
496 f->io_size = td->o.size / td->o.nr_files;
498 f->io_size = f->real_file_size - f->file_offset;
499 } else if (f->real_file_size < td->o.file_size_low ||
500 f->real_file_size > td->o.file_size_high) {
501 if (f->file_offset > td->o.file_size_low)
504 * file size given. if it's fixed, use that. if it's a
505 * range, generate a random size in-between.
507 if (td->o.file_size_low == td->o.file_size_high) {
508 f->io_size = td->o.file_size_low
511 f->io_size = get_rand_file_size(td)
515 f->io_size = f->real_file_size - f->file_offset;
517 if (f->io_size == -1ULL)
520 total_size += f->io_size;
522 if (f->filetype == FIO_TYPE_FILE &&
523 (f->io_size + f->file_offset) > f->real_file_size &&
524 !(td->io_ops->flags & FIO_DISKLESSIO)) {
526 extend_size += (f->io_size + f->file_offset);
527 f->flags |= FIO_FILE_EXTEND;
531 if (!td->o.size || td->o.size > total_size)
532 td->o.size = total_size;
535 * See if we need to extend some files
539 log_info("%s: Laying out IO file(s) (%u file(s) / %LuMiB)\n",
540 td->o.name, need_extend, extend_size >> 20);
542 for_each_file(td, f, i) {
543 unsigned long long old_len, extend_len;
545 if (!(f->flags & FIO_FILE_EXTEND))
548 assert(f->filetype == FIO_TYPE_FILE);
549 f->flags &= ~FIO_FILE_EXTEND;
550 old_len = f->real_file_size;
551 extend_len = f->io_size + f->file_offset - old_len;
552 f->real_file_size = (f->io_size + f->file_offset);
553 err = extend_file(td, f);
557 err = __file_invalidate_cache(td, f, old_len,
570 if (!td->o.zone_size)
571 td->o.zone_size = td->o.size;
574 * iolog already set the total io size, if we read back
577 if (!td->o.read_iolog_file)
578 td->total_io_size = td->o.size * td->o.loops;
581 log_err("%s: you need to specify valid offset=\n", td->o.name);
585 int init_random_map(struct thread_data *td)
587 unsigned long long blocks, num_maps;
591 if (td->o.norandommap || !td_random(td))
594 for_each_file(td, f, i) {
595 blocks = (f->real_file_size + td->o.rw_min_bs - 1) /
596 (unsigned long long) td->o.rw_min_bs;
597 num_maps = (blocks + BLOCKS_PER_MAP - 1) /
598 (unsigned long long) BLOCKS_PER_MAP;
599 f->file_map = smalloc(num_maps * sizeof(long));
601 log_err("fio: failed allocating random map. If running"
602 " a large number of jobs, try the 'norandommap'"
606 f->num_maps = num_maps;
612 void close_files(struct thread_data *td)
617 for_each_file(td, f, i)
618 td_io_close_file(td, f);
621 void close_and_free_files(struct thread_data *td)
626 dprint(FD_FILE, "close files\n");
628 for_each_file(td, f, i) {
629 if (td->o.unlink && f->filetype == FIO_TYPE_FILE)
630 unlink(f->file_name);
632 td_io_close_file(td, f);
644 td->o.filename = NULL;
651 static void get_file_type(struct fio_file *f)
655 if (!strcmp(f->file_name, "-"))
656 f->filetype = FIO_TYPE_PIPE;
658 f->filetype = FIO_TYPE_FILE;
660 if (!lstat(f->file_name, &sb)) {
661 if (S_ISBLK(sb.st_mode))
662 f->filetype = FIO_TYPE_BD;
663 else if (S_ISCHR(sb.st_mode))
664 f->filetype = FIO_TYPE_CHAR;
665 else if (S_ISFIFO(sb.st_mode))
666 f->filetype = FIO_TYPE_PIPE;
670 int add_file(struct thread_data *td, const char *fname)
672 int cur_files = td->files_index;
673 char file_name[PATH_MAX];
677 dprint(FD_FILE, "add file %s\n", fname);
679 f = smalloc(sizeof(*f));
682 dprint(FD_FILE, "resize file array to %d files\n", cur_files + 1);
684 td->files = realloc(td->files, (cur_files + 1) * sizeof(f));
685 td->files[cur_files] = f;
688 * init function, io engine may not be loaded yet
690 if (td->io_ops && (td->io_ops->flags & FIO_DISKLESSIO))
691 f->real_file_size = -1ULL;
694 len = sprintf(file_name, "%s/", td->o.directory);
696 sprintf(file_name + len, "%s", fname);
697 f->file_name = smalloc_strdup(file_name);
701 switch (td->o.file_lock_mode) {
704 case FILE_LOCK_READWRITE:
705 f->lock = fio_mutex_rw_init();
707 case FILE_LOCK_EXCLUSIVE:
708 f->lock = fio_mutex_init(1);
711 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
716 if (f->filetype == FIO_TYPE_FILE)
717 td->nr_normal_files++;
719 dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name,
725 void get_file(struct fio_file *f)
727 dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
728 assert(f->flags & FIO_FILE_OPEN);
732 int put_file(struct thread_data *td, struct fio_file *f)
734 int f_ret = 0, ret = 0;
736 dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
738 if (!(f->flags & FIO_FILE_OPEN))
741 assert(f->references);
745 if (should_fsync(td) && td->o.fsync_on_close)
746 f_ret = fsync(f->fd);
748 if (td->io_ops->close_file)
749 ret = td->io_ops->close_file(td, f);
755 f->flags &= ~FIO_FILE_OPEN;
759 void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
761 if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
764 if (f->lock_owner == td && f->lock_batch--)
767 if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
768 if (ddir == DDIR_READ)
769 fio_mutex_down_read(f->lock);
771 fio_mutex_down_write(f->lock);
772 } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
773 fio_mutex_down(f->lock);
776 f->lock_batch = td->o.lockfile_batch;
780 void unlock_file(struct thread_data *td, struct fio_file *f)
782 if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
787 if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
788 const int is_read = f->lock_ddir == DDIR_READ;
789 int val = fio_mutex_getval(f->lock);
791 if ((is_read && val == 1) || (!is_read && val == -1))
792 f->lock_owner = NULL;
795 fio_mutex_up_read(f->lock);
797 fio_mutex_up_write(f->lock);
798 } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE) {
799 int val = fio_mutex_getval(f->lock);
802 f->lock_owner = NULL;
804 fio_mutex_up(f->lock);
808 void unlock_file_all(struct thread_data *td, struct fio_file *f)
810 if (f->lock_owner != td)
817 static int recurse_dir(struct thread_data *td, const char *dirname)
823 D = opendir(dirname);
825 char buf[FIO_VERROR_SIZE];
827 snprintf(buf, FIO_VERROR_SIZE - 1, "opendir(%s)", dirname);
828 td_verror(td, errno, buf);
832 while ((dir = readdir(D)) != NULL) {
833 char full_path[PATH_MAX];
836 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
839 sprintf(full_path, "%s/%s", dirname, dir->d_name);
841 if (lstat(full_path, &sb) == -1) {
842 if (errno != ENOENT) {
843 td_verror(td, errno, "stat");
848 if (S_ISREG(sb.st_mode)) {
849 add_file(td, full_path);
853 if (!S_ISDIR(sb.st_mode))
856 ret = recurse_dir(td, full_path);
865 int add_dir_files(struct thread_data *td, const char *path)
867 int ret = recurse_dir(td, path);
870 log_info("fio: opendir added %d files\n", td->o.nr_files);
875 void dup_files(struct thread_data *td, struct thread_data *org)
880 dprint(FD_FILE, "dup files: %d\n", org->files_index);
885 td->files = malloc(org->files_index * sizeof(f));
887 for_each_file(org, f, i) {
888 struct fio_file *__f;
890 __f = smalloc(sizeof(*__f));
893 __f->file_name = smalloc_strdup(f->file_name);
900 * Returns the index that matches the filename, or -1 if not there
902 int get_fileno(struct thread_data *td, const char *fname)
907 for_each_file(td, f, i)
908 if (!strcmp(f->file_name, fname))
915 * For log usage, where we add/open/close files automatically
917 void free_release_files(struct thread_data *td)
921 td->nr_normal_files = 0;