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 dprint(FD_FILE, "fallocate file %s, size %llu\n", f->file_name,
73 if (posix_fallocate(f->fd, 0, f->real_file_size) < 0) {
74 td_verror(td, errno, "posix_fallocate");
78 b = malloc(td->o.max_bs[DDIR_WRITE]);
79 memset(b, 0, td->o.max_bs[DDIR_WRITE]);
81 left = f->real_file_size;
82 while (left && !td->terminate) {
83 bs = td->o.max_bs[DDIR_WRITE];
87 r = write(f->fd, b, bs);
94 td_verror(td, errno, "write");
96 td_verror(td, EIO, "write");
103 dprint(FD_FILE, "terminate unlink %s\n", f->file_name);
104 unlink(f->file_name);
105 } else if (td->o.create_fsync) {
106 if (fsync(f->fd) < 0) {
107 td_verror(td, errno, "fsync");
121 static unsigned long long get_rand_file_size(struct thread_data *td)
123 unsigned long long ret, size_d;
126 r = os_random_long(&td->file_size_state);
127 size_d = td->o.file_size_high - td->o.file_size_low;
128 ret = (unsigned long long) ((double) size_d * (r / (RAND_MAX + 1.0)));
129 ret += td->o.file_size_low;
130 ret -= (ret % td->o.rw_min_bs);
134 static int file_size(struct thread_data *td, struct fio_file *f)
138 if (fstat(f->fd, &st) == -1) {
139 td_verror(td, errno, "fstat");
143 f->real_file_size = st.st_size;
147 static int bdev_size(struct thread_data *td, struct fio_file *f)
149 unsigned long long bytes;
152 r = blockdev_size(f->fd, &bytes);
154 td_verror(td, r, "blockdev_size");
158 f->real_file_size = bytes;
162 static int get_file_size(struct thread_data *td, struct fio_file *f)
166 if (f->flags & FIO_SIZE_KNOWN)
169 if (f->filetype == FIO_TYPE_FILE)
170 ret = file_size(td, f);
171 else if (f->filetype == FIO_TYPE_BD)
172 ret = bdev_size(td, f);
174 f->real_file_size = -1;
179 if (f->file_offset > f->real_file_size) {
180 log_err("%s: offset extends end (%Lu > %Lu)\n", td->o.name,
181 f->file_offset, f->real_file_size);
185 f->flags |= FIO_SIZE_KNOWN;
189 static int __file_invalidate_cache(struct thread_data *td, struct fio_file *f,
190 unsigned long long off,
191 unsigned long long len)
198 off = f->file_offset;
200 dprint(FD_IO, "invalidate cache %s: %llu/%llu\n", f->file_name, off,
204 * FIXME: add blockdev flushing too
207 ret = madvise(f->mmap, len, MADV_DONTNEED);
208 else if (f->filetype == FIO_TYPE_FILE) {
209 ret = fadvise(f->fd, off, len, POSIX_FADV_DONTNEED);
210 } else if (f->filetype == FIO_TYPE_BD) {
211 ret = blockdev_invalidate_cache(f->fd);
212 if (ret < 0 && errno == EACCES && geteuid()) {
214 log_err("fio: only root may flush block "
215 "devices. Cache flush bypassed!\n");
220 } else if (f->filetype == FIO_TYPE_CHAR || f->filetype == FIO_TYPE_PIPE)
224 td_verror(td, errno, "invalidate_cache");
226 } else if (ret > 0) {
227 td_verror(td, ret, "invalidate_cache");
235 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
237 return __file_invalidate_cache(td, f, -1, -1);
240 int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
244 dprint(FD_FILE, "fd close %s\n", f->file_name);
248 if (close(f->fd) < 0)
255 static int file_lookup_open(struct fio_file *f, int flags)
257 struct fio_file *__f;
260 __f = lookup_file_hash(f->file_name);
262 dprint(FD_FILE, "found file in hash %s\n", f->file_name);
264 * racy, need the __f->lock locked
267 f->lock_owner = __f->lock_owner;
268 f->lock_batch = __f->lock_batch;
269 f->lock_ddir = __f->lock_ddir;
272 dprint(FD_FILE, "file not found in hash %s\n", f->file_name);
276 f->fd = open(f->file_name, flags, 0600);
280 int generic_open_file(struct thread_data *td, struct fio_file *f)
286 dprint(FD_FILE, "fd open %s\n", f->file_name);
288 if (!strcmp(f->file_name, "-")) {
290 log_err("fio: can't read/write to stdin/out\n");
296 * move output logging to stderr, if we are writing to stdout
303 flags |= OS_O_DIRECT;
306 if (f->filetype != FIO_TYPE_FILE)
314 if (f->filetype == FIO_TYPE_FILE)
318 f->fd = dup(STDOUT_FILENO);
320 from_hash = file_lookup_open(f, flags);
322 if (f->filetype == FIO_TYPE_CHAR && !read_only)
328 f->fd = dup(STDIN_FILENO);
330 from_hash = file_lookup_open(f, flags);
334 char buf[FIO_VERROR_SIZE];
337 if (errno == EPERM && (flags & O_NOATIME)) {
342 snprintf(buf, sizeof(buf) - 1, "open(%s)", f->file_name);
344 td_verror(td, __e, buf);
347 if (get_file_size(td, f))
350 if (!from_hash && f->fd != -1) {
351 if (add_file_hash(f)) {
355 * OK to ignore, we haven't done anything with it
357 ret = generic_close_file(td, f);
368 int open_files(struct thread_data *td)
374 dprint(FD_FILE, "open files\n");
376 for_each_file(td, f, i) {
377 err = td_io_open_file(td, f);
379 if (td->error == EMFILE) {
380 log_err("fio: limited open files to: %d\n",
382 td->o.open_files = td->nr_open_files;
389 if (td->o.open_files == td->nr_open_files)
396 for_each_file(td, f, i)
397 td_io_close_file(td, f);
403 * open/close all files, so that ->real_file_size gets set
405 static int get_file_sizes(struct thread_data *td)
411 for_each_file(td, f, i) {
412 dprint(FD_FILE, "get file size for %p/%d/%p\n", f, i,
415 if (td->io_ops->open_file(td, f)) {
416 if (td->error != ENOENT) {
417 log_err("%s\n", td->verror);
422 if (td->io_ops->close_file)
423 td->io_ops->close_file(td, f);
426 if (f->real_file_size == -1ULL && td->o.size)
427 f->real_file_size = td->o.size / td->o.nr_files;
434 * Open the files and setup files sizes, creating files if necessary.
436 int setup_files(struct thread_data *td)
438 unsigned long long total_size, extend_size;
441 int err = 0, need_extend;
443 dprint(FD_FILE, "setup files\n");
445 if (td->o.read_iolog_file)
449 * if ioengine defines a setup() method, it's responsible for
450 * opening the files and setting f->real_file_size to indicate
451 * the valid range for that file.
453 if (td->io_ops->setup)
454 err = td->io_ops->setup(td);
456 err = get_file_sizes(td);
462 * check sizes. if the files/devices do not exist and the size
463 * isn't passed to fio, abort.
466 for_each_file(td, f, i) {
467 if (f->real_file_size == -1ULL)
470 total_size += f->real_file_size;
474 * device/file sizes are zero and no size given, punt
476 if ((!total_size || total_size == -1ULL) && !td->o.size &&
477 !(td->io_ops->flags & FIO_NOIO) && !td->o.fill_device) {
478 log_err("%s: you need to specify size=\n", td->o.name);
479 td_verror(td, EINVAL, "total_file_size");
484 * now file sizes are known, so we can set ->io_size. if size= is
485 * not given, ->io_size is just equal to ->real_file_size. if size
486 * is given, ->io_size is size / nr_files.
488 extend_size = total_size = 0;
490 for_each_file(td, f, i) {
491 f->file_offset = td->o.start_offset;
493 if (!td->o.file_size_low) {
495 * no file size range given, file size is equal to
496 * total size divided by number of files. if that is
497 * zero, set it to the real file size.
499 f->io_size = td->o.size / td->o.nr_files;
501 f->io_size = f->real_file_size - f->file_offset;
502 } else if (f->real_file_size < td->o.file_size_low ||
503 f->real_file_size > td->o.file_size_high) {
504 if (f->file_offset > td->o.file_size_low)
507 * file size given. if it's fixed, use that. if it's a
508 * range, generate a random size in-between.
510 if (td->o.file_size_low == td->o.file_size_high) {
511 f->io_size = td->o.file_size_low
514 f->io_size = get_rand_file_size(td)
518 f->io_size = f->real_file_size - f->file_offset;
520 if (f->io_size == -1ULL)
523 total_size += f->io_size;
525 if (f->filetype == FIO_TYPE_FILE &&
526 (f->io_size + f->file_offset) > f->real_file_size &&
527 !(td->io_ops->flags & FIO_DISKLESSIO)) {
529 extend_size += (f->io_size + f->file_offset);
530 f->flags |= FIO_FILE_EXTEND;
534 if (!td->o.size || td->o.size > total_size)
535 td->o.size = total_size;
538 * See if we need to extend some files
542 log_info("%s: Laying out IO file(s) (%u file(s) / %LuMiB)\n",
543 td->o.name, need_extend, extend_size >> 20);
545 for_each_file(td, f, i) {
546 unsigned long long old_len, extend_len;
548 if (!(f->flags & FIO_FILE_EXTEND))
551 assert(f->filetype == FIO_TYPE_FILE);
552 f->flags &= ~FIO_FILE_EXTEND;
553 old_len = f->real_file_size;
554 extend_len = f->io_size + f->file_offset - old_len;
555 f->real_file_size = (f->io_size + f->file_offset);
556 err = extend_file(td, f);
560 err = __file_invalidate_cache(td, f, old_len,
573 if (!td->o.zone_size)
574 td->o.zone_size = td->o.size;
577 * iolog already set the total io size, if we read back
580 if (!td->o.read_iolog_file)
581 td->total_io_size = td->o.size * td->o.loops;
584 log_err("%s: you need to specify valid offset=\n", td->o.name);
588 int init_random_map(struct thread_data *td)
590 unsigned long long blocks, num_maps;
594 if (td->o.norandommap || !td_random(td))
597 for_each_file(td, f, i) {
598 blocks = (f->real_file_size + td->o.rw_min_bs - 1) /
599 (unsigned long long) td->o.rw_min_bs;
600 num_maps = (blocks + BLOCKS_PER_MAP - 1) /
601 (unsigned long long) BLOCKS_PER_MAP;
602 f->file_map = smalloc(num_maps * sizeof(long));
604 f->num_maps = num_maps;
607 if (!td->o.softrandommap) {
608 log_err("fio: failed allocating random map. If running"
609 " a large number of jobs, try the 'norandommap'"
610 " option or set 'softrandommap'. Or give"
611 " a larger --alloc-size to fio.\n");
615 log_info("fio: file %s failed allocating random map. Running "
616 "job without.\n", f->file_name);
623 void close_files(struct thread_data *td)
628 for_each_file(td, f, i)
629 td_io_close_file(td, f);
632 void close_and_free_files(struct thread_data *td)
637 dprint(FD_FILE, "close files\n");
639 for_each_file(td, f, i) {
640 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
641 dprint(FD_FILE, "free unlink %s\n", f->file_name);
642 unlink(f->file_name);
645 td_io_close_file(td, f);
657 td->o.filename = NULL;
664 static void get_file_type(struct fio_file *f)
668 if (!strcmp(f->file_name, "-"))
669 f->filetype = FIO_TYPE_PIPE;
671 f->filetype = FIO_TYPE_FILE;
673 if (!lstat(f->file_name, &sb)) {
674 if (S_ISBLK(sb.st_mode))
675 f->filetype = FIO_TYPE_BD;
676 else if (S_ISCHR(sb.st_mode))
677 f->filetype = FIO_TYPE_CHAR;
678 else if (S_ISFIFO(sb.st_mode))
679 f->filetype = FIO_TYPE_PIPE;
683 int add_file(struct thread_data *td, const char *fname)
685 int cur_files = td->files_index;
686 char file_name[PATH_MAX];
690 dprint(FD_FILE, "add file %s\n", fname);
692 f = smalloc(sizeof(*f));
695 dprint(FD_FILE, "resize file array to %d files\n", cur_files + 1);
697 td->files = realloc(td->files, (cur_files + 1) * sizeof(f));
698 td->files[cur_files] = f;
701 * init function, io engine may not be loaded yet
703 if (td->io_ops && (td->io_ops->flags & FIO_DISKLESSIO))
704 f->real_file_size = -1ULL;
707 len = sprintf(file_name, "%s/", td->o.directory);
709 sprintf(file_name + len, "%s", fname);
710 f->file_name = smalloc_strdup(file_name);
714 switch (td->o.file_lock_mode) {
717 case FILE_LOCK_READWRITE:
718 f->lock = fio_mutex_rw_init();
720 case FILE_LOCK_EXCLUSIVE:
721 f->lock = fio_mutex_init(1);
724 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
729 if (f->filetype == FIO_TYPE_FILE)
730 td->nr_normal_files++;
732 dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name,
738 void get_file(struct fio_file *f)
740 dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
741 assert(f->flags & FIO_FILE_OPEN);
745 int put_file(struct thread_data *td, struct fio_file *f)
747 int f_ret = 0, ret = 0;
749 dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
751 if (!(f->flags & FIO_FILE_OPEN))
754 assert(f->references);
758 if (should_fsync(td) && td->o.fsync_on_close)
759 f_ret = fsync(f->fd);
761 if (td->io_ops->close_file)
762 ret = td->io_ops->close_file(td, f);
768 f->flags &= ~FIO_FILE_OPEN;
772 void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
774 if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
777 if (f->lock_owner == td && f->lock_batch--)
780 if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
781 if (ddir == DDIR_READ)
782 fio_mutex_down_read(f->lock);
784 fio_mutex_down_write(f->lock);
785 } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
786 fio_mutex_down(f->lock);
789 f->lock_batch = td->o.lockfile_batch;
793 void unlock_file(struct thread_data *td, struct fio_file *f)
795 if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
800 if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
801 const int is_read = f->lock_ddir == DDIR_READ;
802 int val = fio_mutex_getval(f->lock);
804 if ((is_read && val == 1) || (!is_read && val == -1))
805 f->lock_owner = NULL;
808 fio_mutex_up_read(f->lock);
810 fio_mutex_up_write(f->lock);
811 } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE) {
812 int val = fio_mutex_getval(f->lock);
815 f->lock_owner = NULL;
817 fio_mutex_up(f->lock);
821 void unlock_file_all(struct thread_data *td, struct fio_file *f)
823 if (f->lock_owner != td)
830 static int recurse_dir(struct thread_data *td, const char *dirname)
836 D = opendir(dirname);
838 char buf[FIO_VERROR_SIZE];
840 snprintf(buf, FIO_VERROR_SIZE - 1, "opendir(%s)", dirname);
841 td_verror(td, errno, buf);
845 while ((dir = readdir(D)) != NULL) {
846 char full_path[PATH_MAX];
849 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
852 sprintf(full_path, "%s/%s", dirname, dir->d_name);
854 if (lstat(full_path, &sb) == -1) {
855 if (errno != ENOENT) {
856 td_verror(td, errno, "stat");
861 if (S_ISREG(sb.st_mode)) {
862 add_file(td, full_path);
866 if (!S_ISDIR(sb.st_mode))
869 ret = recurse_dir(td, full_path);
878 int add_dir_files(struct thread_data *td, const char *path)
880 int ret = recurse_dir(td, path);
883 log_info("fio: opendir added %d files\n", td->o.nr_files);
888 void dup_files(struct thread_data *td, struct thread_data *org)
893 dprint(FD_FILE, "dup files: %d\n", org->files_index);
898 td->files = malloc(org->files_index * sizeof(f));
900 for_each_file(org, f, i) {
901 struct fio_file *__f;
903 __f = smalloc(sizeof(*__f));
906 __f->file_name = smalloc_strdup(f->file_name);
913 * Returns the index that matches the filename, or -1 if not there
915 int get_fileno(struct thread_data *td, const char *fname)
920 for_each_file(td, f, i)
921 if (!strcmp(f->file_name, fname))
928 * For log usage, where we add/open/close files automatically
930 void free_release_files(struct thread_data *td)
934 td->nr_normal_files = 0;