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) ||
37 (td_write(td) && td->io_ops->flags & FIO_NOEXTEND))
39 if (td_write(td) && !td->o.overwrite)
42 if (unlink_file || new_layout) {
43 dprint(FD_FILE, "layout unlink %s\n", f->file_name);
44 if ((unlink(f->file_name) < 0) && (errno != ENOENT)) {
45 td_verror(td, errno, "unlink");
50 flags = O_WRONLY | O_CREAT;
54 dprint(FD_FILE, "open file %s, flags %x\n", f->file_name, flags);
55 f->fd = open(f->file_name, flags, 0644);
57 td_verror(td, errno, "open");
64 dprint(FD_FILE, "truncate file %s, size %llu\n", f->file_name,
66 if (ftruncate(f->fd, f->real_file_size) == -1) {
67 td_verror(td, errno, "ftruncate");
71 #ifdef FIO_HAVE_FALLOCATE
72 dprint(FD_FILE, "fallocate file %s, size %llu\n", f->file_name,
74 r = posix_fallocate(f->fd, 0, f->real_file_size);
76 log_err("fio: posix_fallocate fails: %s\n", strerror(-r));
79 b = malloc(td->o.max_bs[DDIR_WRITE]);
80 memset(b, 0, td->o.max_bs[DDIR_WRITE]);
82 left = f->real_file_size;
83 while (left && !td->terminate) {
84 bs = td->o.max_bs[DDIR_WRITE];
88 r = write(f->fd, b, bs);
95 td_verror(td, errno, "write");
97 td_verror(td, EIO, "write");
104 dprint(FD_FILE, "terminate unlink %s\n", f->file_name);
105 unlink(f->file_name);
106 } else if (td->o.create_fsync) {
107 if (fsync(f->fd) < 0) {
108 td_verror(td, errno, "fsync");
122 static unsigned long long get_rand_file_size(struct thread_data *td)
124 unsigned long long ret, sized;
127 r = os_random_long(&td->file_size_state);
128 sized = td->o.file_size_high - td->o.file_size_low;
129 ret = (unsigned long long) ((double) sized * (r / (OS_RAND_MAX + 1.0)));
130 ret += td->o.file_size_low;
131 ret -= (ret % td->o.rw_min_bs);
135 static int file_size(struct thread_data *td, struct fio_file *f)
139 if (fstat(f->fd, &st) == -1) {
140 td_verror(td, errno, "fstat");
144 f->real_file_size = st.st_size;
148 static int bdev_size(struct thread_data *td, struct fio_file *f)
150 unsigned long long bytes;
153 r = blockdev_size(f->fd, &bytes);
155 td_verror(td, r, "blockdev_size");
160 log_err("%s: zero sized block device?\n", f->file_name);
164 f->real_file_size = bytes;
168 static int get_file_size(struct thread_data *td, struct fio_file *f)
172 if (f->flags & FIO_SIZE_KNOWN)
175 if (f->filetype == FIO_TYPE_FILE)
176 ret = file_size(td, f);
177 else if (f->filetype == FIO_TYPE_BD)
178 ret = bdev_size(td, f);
180 f->real_file_size = -1;
185 if (f->file_offset > f->real_file_size) {
186 log_err("%s: offset extends end (%Lu > %Lu)\n", td->o.name,
187 f->file_offset, f->real_file_size);
191 f->flags |= FIO_SIZE_KNOWN;
195 static int __file_invalidate_cache(struct thread_data *td, struct fio_file *f,
196 unsigned long long off,
197 unsigned long long len)
204 off = f->file_offset;
206 dprint(FD_IO, "invalidate cache %s: %llu/%llu\n", f->file_name, off,
210 * FIXME: add blockdev flushing too
213 ret = madvise(f->mmap, len, MADV_DONTNEED);
214 else if (f->filetype == FIO_TYPE_FILE) {
215 ret = fadvise(f->fd, off, len, POSIX_FADV_DONTNEED);
216 } else if (f->filetype == FIO_TYPE_BD) {
217 ret = blockdev_invalidate_cache(f->fd);
218 if (ret < 0 && errno == EACCES && geteuid()) {
220 log_err("fio: only root may flush block "
221 "devices. Cache flush bypassed!\n");
226 } else if (f->filetype == FIO_TYPE_CHAR || f->filetype == FIO_TYPE_PIPE)
230 td_verror(td, errno, "invalidate_cache");
232 } else if (ret > 0) {
233 td_verror(td, ret, "invalidate_cache");
241 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
243 if (!(f->flags & FIO_FILE_OPEN))
246 return __file_invalidate_cache(td, f, -1, -1);
249 int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
253 dprint(FD_FILE, "fd close %s\n", f->file_name);
257 if (close(f->fd) < 0)
264 static int file_lookup_open(struct fio_file *f, int flags)
266 struct fio_file *__f;
269 __f = lookup_file_hash(f->file_name);
271 dprint(FD_FILE, "found file in hash %s\n", f->file_name);
273 * racy, need the __f->lock locked
276 f->lock_owner = __f->lock_owner;
277 f->lock_batch = __f->lock_batch;
278 f->lock_ddir = __f->lock_ddir;
281 dprint(FD_FILE, "file not found in hash %s\n", f->file_name);
285 f->fd = open(f->file_name, flags, 0600);
289 int generic_open_file(struct thread_data *td, struct fio_file *f)
295 dprint(FD_FILE, "fd open %s\n", f->file_name);
297 if (!strcmp(f->file_name, "-")) {
299 log_err("fio: can't read/write to stdin/out\n");
305 * move output logging to stderr, if we are writing to stdout
312 flags |= OS_O_DIRECT;
315 if (f->filetype != FIO_TYPE_FILE)
316 flags |= FIO_O_NOATIME;
317 if (td->o.create_on_open)
325 if (f->filetype == FIO_TYPE_FILE)
329 f->fd = dup(STDOUT_FILENO);
331 from_hash = file_lookup_open(f, flags);
333 if (f->filetype == FIO_TYPE_CHAR && !read_only)
339 f->fd = dup(STDIN_FILENO);
341 from_hash = file_lookup_open(f, flags);
345 char buf[FIO_VERROR_SIZE];
348 if (errno == EPERM && (flags & FIO_O_NOATIME)) {
349 flags &= ~FIO_O_NOATIME;
353 snprintf(buf, sizeof(buf) - 1, "open(%s)", f->file_name);
355 td_verror(td, __e, buf);
358 if (get_file_size(td, f))
361 if (!from_hash && f->fd != -1) {
362 if (add_file_hash(f)) {
366 * OK to ignore, we haven't done anything with it
368 ret = generic_close_file(td, f);
379 int open_files(struct thread_data *td)
385 dprint(FD_FILE, "open files\n");
387 for_each_file(td, f, i) {
388 err = td_io_open_file(td, f);
390 if (td->error == EMFILE) {
391 log_err("fio: limited open files to: %d\n",
393 td->o.open_files = td->nr_open_files;
400 if (td->o.open_files == td->nr_open_files)
407 for_each_file(td, f, i)
408 td_io_close_file(td, f);
414 * open/close all files, so that ->real_file_size gets set
416 static int get_file_sizes(struct thread_data *td)
422 for_each_file(td, f, i) {
423 dprint(FD_FILE, "get file size for %p/%d/%p\n", f, i,
426 if (td->io_ops->open_file(td, f)) {
427 if (td->error != ENOENT) {
428 log_err("%s\n", td->verror);
433 if (td->io_ops->close_file)
434 td->io_ops->close_file(td, f);
437 if (f->real_file_size == -1ULL && td->o.size)
438 f->real_file_size = td->o.size / td->o.nr_files;
445 * Open the files and setup files sizes, creating files if necessary.
447 int setup_files(struct thread_data *td)
449 unsigned long long total_size, extend_size;
452 int err = 0, need_extend;
454 dprint(FD_FILE, "setup files\n");
456 if (td->o.read_iolog_file)
460 * if ioengine defines a setup() method, it's responsible for
461 * opening the files and setting f->real_file_size to indicate
462 * the valid range for that file.
464 if (td->io_ops->setup)
465 err = td->io_ops->setup(td);
467 err = get_file_sizes(td);
473 * check sizes. if the files/devices do not exist and the size
474 * isn't passed to fio, abort.
477 for_each_file(td, f, i) {
478 if (f->real_file_size == -1ULL)
481 total_size += f->real_file_size;
485 * device/file sizes are zero and no size given, punt
487 if ((!total_size || total_size == -1ULL) && !td->o.size &&
488 !(td->io_ops->flags & FIO_NOIO) && !td->o.fill_device) {
489 log_err("%s: you need to specify size=\n", td->o.name);
490 td_verror(td, EINVAL, "total_file_size");
495 * now file sizes are known, so we can set ->io_size. if size= is
496 * not given, ->io_size is just equal to ->real_file_size. if size
497 * is given, ->io_size is size / nr_files.
499 extend_size = total_size = 0;
501 for_each_file(td, f, i) {
502 f->file_offset = td->o.start_offset;
504 if (!td->o.file_size_low) {
506 * no file size range given, file size is equal to
507 * total size divided by number of files. if that is
508 * zero, set it to the real file size.
510 f->io_size = td->o.size / td->o.nr_files;
512 f->io_size = f->real_file_size - f->file_offset;
513 } else if (f->real_file_size < td->o.file_size_low ||
514 f->real_file_size > td->o.file_size_high) {
515 if (f->file_offset > td->o.file_size_low)
518 * file size given. if it's fixed, use that. if it's a
519 * range, generate a random size in-between.
521 if (td->o.file_size_low == td->o.file_size_high) {
522 f->io_size = td->o.file_size_low
525 f->io_size = get_rand_file_size(td)
529 f->io_size = f->real_file_size - f->file_offset;
531 if (f->io_size == -1ULL)
534 total_size += f->io_size;
536 if (f->filetype == FIO_TYPE_FILE &&
537 (f->io_size + f->file_offset) > f->real_file_size &&
538 !(td->io_ops->flags & FIO_DISKLESSIO)) {
539 if (!td->o.create_on_open) {
541 extend_size += (f->io_size + f->file_offset);
543 f->real_file_size = f->io_size + f->file_offset;
544 f->flags |= FIO_FILE_EXTEND;
548 if (!td->o.size || td->o.size > total_size)
549 td->o.size = total_size;
552 * See if we need to extend some files
557 log_info("%s: Laying out IO file(s) (%u file(s) /"
558 " %LuMiB)\n", td->o.name, need_extend,
561 for_each_file(td, f, i) {
562 unsigned long long old_len, extend_len;
564 if (!(f->flags & FIO_FILE_EXTEND))
567 assert(f->filetype == FIO_TYPE_FILE);
568 f->flags &= ~FIO_FILE_EXTEND;
569 old_len = f->real_file_size;
570 extend_len = f->io_size + f->file_offset - old_len;
571 f->real_file_size = (f->io_size + f->file_offset);
572 err = extend_file(td, f);
576 err = __file_invalidate_cache(td, f, old_len,
589 if (!td->o.zone_size)
590 td->o.zone_size = td->o.size;
593 * iolog already set the total io size, if we read back
596 if (!td->o.read_iolog_file)
597 td->total_io_size = td->o.size * td->o.loops;
600 log_err("%s: you need to specify valid offset=\n", td->o.name);
604 int init_random_map(struct thread_data *td)
606 unsigned long long blocks, num_maps;
610 if (td->o.norandommap || !td_random(td))
613 for_each_file(td, f, i) {
614 blocks = (f->real_file_size + td->o.rw_min_bs - 1) /
615 (unsigned long long) td->o.rw_min_bs;
616 num_maps = (blocks + BLOCKS_PER_MAP - 1) /
617 (unsigned long long) BLOCKS_PER_MAP;
618 f->file_map = smalloc(num_maps * sizeof(int));
620 f->num_maps = num_maps;
623 if (!td->o.softrandommap) {
624 log_err("fio: failed allocating random map. If running"
625 " a large number of jobs, try the 'norandommap'"
626 " option or set 'softrandommap'. Or give"
627 " a larger --alloc-size to fio.\n");
631 log_info("fio: file %s failed allocating random map. Running "
632 "job without.\n", f->file_name);
639 void close_files(struct thread_data *td)
644 for_each_file(td, f, i)
645 td_io_close_file(td, f);
648 void close_and_free_files(struct thread_data *td)
653 dprint(FD_FILE, "close files\n");
655 for_each_file(td, f, i) {
656 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
657 dprint(FD_FILE, "free unlink %s\n", f->file_name);
658 unlink(f->file_name);
661 td_io_close_file(td, f);
674 td->o.filename = NULL;
681 static void get_file_type(struct fio_file *f)
685 if (!strcmp(f->file_name, "-"))
686 f->filetype = FIO_TYPE_PIPE;
688 f->filetype = FIO_TYPE_FILE;
690 if (!lstat(f->file_name, &sb)) {
691 if (S_ISBLK(sb.st_mode))
692 f->filetype = FIO_TYPE_BD;
693 else if (S_ISCHR(sb.st_mode))
694 f->filetype = FIO_TYPE_CHAR;
695 else if (S_ISFIFO(sb.st_mode))
696 f->filetype = FIO_TYPE_PIPE;
700 int add_file(struct thread_data *td, const char *fname)
702 int cur_files = td->files_index;
703 char file_name[PATH_MAX];
707 dprint(FD_FILE, "add file %s\n", fname);
709 f = smalloc(sizeof(*f));
711 log_err("fio: smalloc OOM\n");
717 dprint(FD_FILE, "resize file array to %d files\n", cur_files + 1);
719 td->files = realloc(td->files, (cur_files + 1) * sizeof(f));
720 td->files[cur_files] = f;
723 * init function, io engine may not be loaded yet
725 if (td->io_ops && (td->io_ops->flags & FIO_DISKLESSIO))
726 f->real_file_size = -1ULL;
729 len = sprintf(file_name, "%s/", td->o.directory);
731 sprintf(file_name + len, "%s", fname);
732 f->file_name = smalloc_strdup(file_name);
734 log_err("fio: smalloc OOM\n");
740 switch (td->o.file_lock_mode) {
743 case FILE_LOCK_READWRITE:
744 f->lock = fio_mutex_rw_init();
746 case FILE_LOCK_EXCLUSIVE:
747 f->lock = fio_mutex_init(1);
750 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
755 if (f->filetype == FIO_TYPE_FILE)
756 td->nr_normal_files++;
758 dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name,
764 void get_file(struct fio_file *f)
766 dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
767 assert(f->flags & FIO_FILE_OPEN);
771 int put_file(struct thread_data *td, struct fio_file *f)
773 int f_ret = 0, ret = 0;
775 dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
777 if (!(f->flags & FIO_FILE_OPEN))
780 assert(f->references);
784 if (should_fsync(td) && td->o.fsync_on_close)
785 f_ret = fsync(f->fd);
787 if (td->io_ops->close_file)
788 ret = td->io_ops->close_file(td, f);
794 f->flags &= ~FIO_FILE_OPEN;
798 void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
800 if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
803 if (f->lock_owner == td && f->lock_batch--)
806 if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
807 if (ddir == DDIR_READ)
808 fio_mutex_down_read(f->lock);
810 fio_mutex_down_write(f->lock);
811 } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
812 fio_mutex_down(f->lock);
815 f->lock_batch = td->o.lockfile_batch;
819 void unlock_file(struct thread_data *td, struct fio_file *f)
821 if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
826 if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
827 const int is_read = f->lock_ddir == DDIR_READ;
828 int val = fio_mutex_getval(f->lock);
830 if ((is_read && val == 1) || (!is_read && val == -1))
831 f->lock_owner = NULL;
834 fio_mutex_up_read(f->lock);
836 fio_mutex_up_write(f->lock);
837 } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE) {
838 int val = fio_mutex_getval(f->lock);
841 f->lock_owner = NULL;
843 fio_mutex_up(f->lock);
847 void unlock_file_all(struct thread_data *td, struct fio_file *f)
849 if (f->lock_owner != td)
856 static int recurse_dir(struct thread_data *td, const char *dirname)
862 D = opendir(dirname);
864 char buf[FIO_VERROR_SIZE];
866 snprintf(buf, FIO_VERROR_SIZE - 1, "opendir(%s)", dirname);
867 td_verror(td, errno, buf);
871 while ((dir = readdir(D)) != NULL) {
872 char full_path[PATH_MAX];
875 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
878 sprintf(full_path, "%s/%s", dirname, dir->d_name);
880 if (lstat(full_path, &sb) == -1) {
881 if (errno != ENOENT) {
882 td_verror(td, errno, "stat");
887 if (S_ISREG(sb.st_mode)) {
888 add_file(td, full_path);
892 if (!S_ISDIR(sb.st_mode))
895 ret = recurse_dir(td, full_path);
904 int add_dir_files(struct thread_data *td, const char *path)
906 int ret = recurse_dir(td, path);
909 log_info("fio: opendir added %d files\n", td->o.nr_files);
914 void dup_files(struct thread_data *td, struct thread_data *org)
919 dprint(FD_FILE, "dup files: %d\n", org->files_index);
924 td->files = malloc(org->files_index * sizeof(f));
926 for_each_file(org, f, i) {
927 struct fio_file *__f;
929 __f = smalloc(sizeof(*__f));
931 log_err("fio: smalloc OOM\n");
936 __f->file_name = smalloc_strdup(f->file_name);
937 if (!__f->file_name) {
938 log_err("fio: smalloc OOM\n");
942 __f->filetype = f->filetype;
950 * Returns the index that matches the filename, or -1 if not there
952 int get_fileno(struct thread_data *td, const char *fname)
957 for_each_file(td, f, i)
958 if (!strcmp(f->file_name, fname))
965 * For log usage, where we add/open/close files automatically
967 void free_release_files(struct thread_data *td)
971 td->nr_normal_files = 0;