17 #include "lib/axmap.h"
19 #ifdef CONFIG_LINUX_FALLOCATE
20 #include <linux/falloc.h>
25 static FLIST_HEAD(filename_list);
28 * List entry for filename_list
31 struct flist_head list;
35 static inline void clear_error(struct thread_data *td)
42 * Leaves f->fd open on success, caller must close
44 static int extend_file(struct thread_data *td, struct fio_file *f)
46 int r, new_layout = 0, unlink_file = 0, flags;
47 unsigned long long left;
52 log_err("fio: refusing extend of file due to read-only\n");
57 * check if we need to lay the file out complete again. fio
58 * does that for operations involving reads, or for writes
59 * where overwrite is set
62 (td_write(td) && td->o.overwrite && !td->o.file_append) ||
63 (td_write(td) && td_ioengine_flagged(td, FIO_NOEXTEND)))
65 if (td_write(td) && !td->o.overwrite && !td->o.file_append)
68 if (unlink_file || new_layout) {
71 dprint(FD_FILE, "layout unlink %s\n", f->file_name);
73 ret = td_io_unlink_file(td, f);
74 if (ret != 0 && ret != ENOENT) {
75 td_verror(td, errno, "unlink");
81 if (td->o.allow_create)
90 dprint(FD_FILE, "open file %s, flags %x\n", f->file_name, flags);
91 f->fd = open(f->file_name, flags, 0644);
95 if (err == ENOENT && !td->o.allow_create)
96 log_err("fio: file creation disallowed by "
97 "allow_file_create=0\n");
99 td_verror(td, err, "open");
103 #ifdef CONFIG_POSIX_FALLOCATE
104 if (!td->o.fill_device) {
105 switch (td->o.fallocate_mode) {
106 case FIO_FALLOCATE_NONE:
108 case FIO_FALLOCATE_POSIX:
109 dprint(FD_FILE, "posix_fallocate file %s size %llu\n",
111 (unsigned long long) f->real_file_size);
113 r = posix_fallocate(f->fd, 0, f->real_file_size);
115 log_err("fio: posix_fallocate fails: %s\n",
119 #ifdef CONFIG_LINUX_FALLOCATE
120 case FIO_FALLOCATE_KEEP_SIZE:
122 "fallocate(FALLOC_FL_KEEP_SIZE) "
123 "file %s size %llu\n", f->file_name,
124 (unsigned long long) f->real_file_size);
126 r = fallocate(f->fd, FALLOC_FL_KEEP_SIZE, 0,
129 td_verror(td, errno, "fallocate");
132 #endif /* CONFIG_LINUX_FALLOCATE */
134 log_err("fio: unknown fallocate mode: %d\n",
135 td->o.fallocate_mode);
139 #endif /* CONFIG_POSIX_FALLOCATE */
142 * If our jobs don't require regular files initially, we're done.
148 * The size will be -1ULL when fill_device is used, so don't truncate
149 * or fallocate this file, just write it
151 if (!td->o.fill_device) {
152 dprint(FD_FILE, "truncate file %s, size %llu\n", f->file_name,
153 (unsigned long long) f->real_file_size);
154 if (ftruncate(f->fd, f->real_file_size) == -1) {
155 if (errno != EFBIG) {
156 td_verror(td, errno, "ftruncate");
162 b = malloc(td->o.max_bs[DDIR_WRITE]);
164 left = f->real_file_size;
165 while (left && !td->terminate) {
166 bs = td->o.max_bs[DDIR_WRITE];
170 fill_io_buffer(td, b, bs, bs);
172 r = write(f->fd, b, bs);
182 if (td->o.fill_device)
184 log_info("fio: ENOSPC on laying out "
188 td_verror(td, errno, "write");
190 td_verror(td, EIO, "write");
197 dprint(FD_FILE, "terminate unlink %s\n", f->file_name);
198 td_io_unlink_file(td, f);
199 } else if (td->o.create_fsync) {
200 if (fsync(f->fd) < 0) {
201 td_verror(td, errno, "fsync");
205 if (td->o.fill_device && !td_write(td)) {
206 fio_file_clear_size_known(f);
207 if (td_io_get_file_size(td, f))
209 if (f->io_size > f->real_file_size)
210 f->io_size = f->real_file_size;
224 static int pre_read_file(struct thread_data *td, struct fio_file *f)
226 int ret = 0, r, did_open = 0, old_runstate;
227 unsigned long long left;
231 if (td_ioengine_flagged(td, FIO_PIPEIO))
234 if (!fio_file_open(f)) {
235 if (td->io_ops->open_file(td, f)) {
236 log_err("fio: cannot pre-read, failed to open file\n");
242 old_runstate = td_bump_runstate(td, TD_PRE_READING);
244 bs = td->o.max_bs[DDIR_READ];
248 if (lseek(f->fd, f->file_offset, SEEK_SET) < 0) {
249 td_verror(td, errno, "lseek");
250 log_err("fio: failed to lseek pre-read file\n");
257 while (left && !td->terminate) {
261 r = read(f->fd, b, bs);
267 td_verror(td, EIO, "pre_read");
273 td_restore_runstate(td, old_runstate);
276 td->io_ops->close_file(td, f);
282 unsigned long long get_rand_file_size(struct thread_data *td)
284 unsigned long long ret, sized;
288 frand_max = rand_max(&td->file_size_state);
289 r = __rand(&td->file_size_state);
290 sized = td->o.file_size_high - td->o.file_size_low;
291 ret = (unsigned long long) ((double) sized * (r / (frand_max + 1.0)));
292 ret += td->o.file_size_low;
293 ret -= (ret % td->o.rw_min_bs);
297 static int file_size(struct thread_data *td, struct fio_file *f)
301 if (stat(f->file_name, &st) == -1) {
302 td_verror(td, errno, "fstat");
306 f->real_file_size = st.st_size;
310 static int bdev_size(struct thread_data *td, struct fio_file *f)
312 unsigned long long bytes = 0;
315 if (td->io_ops->open_file(td, f)) {
316 log_err("fio: failed opening blockdev %s for size check\n",
321 r = blockdev_size(f, &bytes);
323 td_verror(td, r, "blockdev_size");
328 log_err("%s: zero sized block device?\n", f->file_name);
332 f->real_file_size = bytes;
333 td->io_ops->close_file(td, f);
336 td->io_ops->close_file(td, f);
340 static int char_size(struct thread_data *td, struct fio_file *f)
342 #ifdef FIO_HAVE_CHARDEV_SIZE
343 unsigned long long bytes = 0;
346 if (td->io_ops->open_file(td, f)) {
347 log_err("fio: failed opening chardev %s for size check\n",
352 r = chardev_size(f, &bytes);
354 td_verror(td, r, "chardev_size");
359 log_err("%s: zero sized char device?\n", f->file_name);
363 f->real_file_size = bytes;
364 td->io_ops->close_file(td, f);
367 td->io_ops->close_file(td, f);
370 f->real_file_size = -1ULL;
375 static int get_file_size(struct thread_data *td, struct fio_file *f)
379 if (fio_file_size_known(f))
382 if (f->filetype == FIO_TYPE_FILE)
383 ret = file_size(td, f);
384 else if (f->filetype == FIO_TYPE_BLOCK)
385 ret = bdev_size(td, f);
386 else if (f->filetype == FIO_TYPE_CHAR)
387 ret = char_size(td, f);
389 f->real_file_size = -1ULL;
392 * Leave ->real_file_size with 0 since it could be expectation
393 * of initial setup for regular files.
399 * If ->real_file_size is -1, a conditional for the message
400 * "offset extends end" is always true, but it makes no sense,
401 * so just return the same value here.
403 if (f->real_file_size == -1ULL) {
404 log_info("%s: failed to get file size of %s\n", td->o.name,
409 if (td->o.start_offset && f->file_offset == 0)
410 dprint(FD_FILE, "offset of file %s not initialized yet\n",
413 * ->file_offset normally hasn't been initialized yet, so this
414 * is basically always false.
416 if (f->file_offset > f->real_file_size) {
417 log_err("%s: offset extends end (%llu > %llu)\n", td->o.name,
418 (unsigned long long) f->file_offset,
419 (unsigned long long) f->real_file_size);
423 fio_file_set_size_known(f);
427 static int __file_invalidate_cache(struct thread_data *td, struct fio_file *f,
428 unsigned long long off,
429 unsigned long long len)
431 int errval = 0, ret = 0;
440 off = f->file_offset;
442 if (len == -1ULL || off == -1ULL)
445 if (td->io_ops->invalidate) {
446 dprint(FD_IO, "invalidate %s cache %s\n", td->io_ops->name,
448 ret = td->io_ops->invalidate(td, f);
451 } else if (f->filetype == FIO_TYPE_FILE) {
452 dprint(FD_IO, "declare unneeded cache %s: %llu/%llu\n",
453 f->file_name, off, len);
454 ret = posix_fadvise(f->fd, off, len, POSIX_FADV_DONTNEED);
457 } else if (f->filetype == FIO_TYPE_BLOCK) {
460 dprint(FD_IO, "drop page cache %s\n", f->file_name);
461 ret = blockdev_invalidate_cache(f);
462 while (ret < 0 && errno == EAGAIN && retry_count++ < 25) {
464 * Linux multipath devices reject ioctl while
465 * the maps are being updated. That window can
466 * last tens of milliseconds; we'll try up to
467 * a quarter of a second.
470 ret = blockdev_invalidate_cache(f);
472 if (ret < 0 && errno == EACCES && geteuid()) {
474 log_err("fio: only root may flush block "
475 "devices. Cache flush bypassed!\n");
482 else if (ret) /* probably not supported */
484 } else if (f->filetype == FIO_TYPE_CHAR ||
485 f->filetype == FIO_TYPE_PIPE) {
486 dprint(FD_IO, "invalidate not supported %s\n", f->file_name);
491 * Cache flushing isn't a fatal condition, and we know it will
492 * happen on some platforms where we don't have the proper
493 * function to flush eg block device caches. So just warn and
494 * continue on our way.
497 log_info("fio: cache invalidation of %s failed: %s\n",
498 f->file_name, strerror(errval));
504 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
506 if (!fio_file_open(f))
509 return __file_invalidate_cache(td, f, -1ULL, -1ULL);
512 int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
516 dprint(FD_FILE, "fd close %s\n", f->file_name);
520 if (close(f->fd) < 0)
525 if (f->shadow_fd != -1) {
534 int file_lookup_open(struct fio_file *f, int flags)
536 struct fio_file *__f;
539 __f = lookup_file_hash(f->file_name);
541 dprint(FD_FILE, "found file in hash %s\n", f->file_name);
545 dprint(FD_FILE, "file not found in hash %s\n", f->file_name);
553 f->fd = open(f->file_name, flags, 0600);
557 static int file_close_shadow_fds(struct thread_data *td)
563 for_each_file(td, f, i) {
564 if (f->shadow_fd == -1)
575 int generic_open_file(struct thread_data *td, struct fio_file *f)
581 dprint(FD_FILE, "fd open %s\n", f->file_name);
583 if (!strcmp(f->file_name, "-")) {
585 log_err("fio: can't read/write to stdin/out\n");
591 * move output logging to stderr, if we are writing to stdout
600 flags |= OS_O_DIRECT;
603 td_verror(td, EINVAL, "OS does not support atomic IO");
606 flags |= OS_O_DIRECT | FIO_O_ATOMIC;
610 if (td->o.create_on_open && td->o.allow_create)
613 if (f->filetype != FIO_TYPE_FILE)
614 flags |= FIO_O_NOATIME;
621 if (f->filetype == FIO_TYPE_FILE && td->o.allow_create)
625 f->fd = dup(STDOUT_FILENO);
627 from_hash = file_lookup_open(f, flags);
628 } else if (td_read(td)) {
629 if (f->filetype == FIO_TYPE_CHAR && !read_only)
635 f->fd = dup(STDIN_FILENO);
637 from_hash = file_lookup_open(f, flags);
638 } else if (td_trim(td)) {
639 assert(!td_rw(td)); /* should have matched above */
641 from_hash = file_lookup_open(f, flags);
645 char buf[FIO_VERROR_SIZE];
648 if (__e == EPERM && (flags & FIO_O_NOATIME)) {
649 flags &= ~FIO_O_NOATIME;
652 if (__e == EMFILE && file_close_shadow_fds(td))
655 snprintf(buf, sizeof(buf), "open(%s)", f->file_name);
657 if (__e == EINVAL && (flags & OS_O_DIRECT)) {
658 log_err("fio: looks like your file system does not " \
659 "support direct=1/buffered=0\n");
662 td_verror(td, __e, buf);
666 if (!from_hash && f->fd != -1) {
667 if (add_file_hash(f)) {
671 * Stash away descriptor for later close. This is to
672 * work-around a "feature" on Linux, where a close of
673 * an fd that has been opened for write will trigger
674 * udev to call blkid to check partitions, fs id, etc.
675 * That pollutes the device cache, which can slow down
676 * unbuffered accesses.
678 if (f->shadow_fd == -1)
679 f->shadow_fd = f->fd;
682 * OK to ignore, we haven't done anything
685 ret = generic_close_file(td, f);
695 * This function i.e. get_file_size() is the default .get_file_size
696 * implementation of majority of I/O engines.
698 int generic_get_file_size(struct thread_data *td, struct fio_file *f)
700 return get_file_size(td, f);
704 * open/close all files, so that ->real_file_size gets set
706 static int get_file_sizes(struct thread_data *td)
712 for_each_file(td, f, i) {
713 dprint(FD_FILE, "get file size for %p/%d/%s\n", f, i,
716 if (td_io_get_file_size(td, f)) {
717 if (td->error != ENOENT) {
718 log_err("%s\n", td->verror);
726 * There are corner cases where we end up with -1 for
727 * ->real_file_size due to unsupported file type, etc.
728 * We then just set to size option value divided by number
729 * of files, similar to the way file ->io_size is set.
730 * stat(2) failure doesn't set ->real_file_size to -1.
732 if (f->real_file_size == -1ULL && td->o.size)
733 f->real_file_size = td->o.size / td->o.nr_files;
740 struct flist_head list;
747 * Get free number of bytes for each file on each unique mount.
749 static unsigned long long get_fs_free_counts(struct thread_data *td)
751 struct flist_head *n, *tmp;
752 unsigned long long ret = 0;
753 struct fio_mount *fm;
758 for_each_file(td, f, i) {
762 if (f->filetype == FIO_TYPE_BLOCK || f->filetype == FIO_TYPE_CHAR) {
763 if (f->real_file_size != -1ULL)
764 ret += f->real_file_size;
766 } else if (f->filetype != FIO_TYPE_FILE)
770 strncpy(buf, f->file_name, 255);
772 if (stat(buf, &sb) < 0) {
776 if (stat(buf, &sb) < 0)
781 flist_for_each(n, &list) {
782 fm = flist_entry(n, struct fio_mount, list);
783 if (fm->key == sb.st_dev)
792 fm = calloc(1, sizeof(*fm));
793 strncpy(fm->__base, buf, sizeof(fm->__base) - 1);
794 fm->base = basename(fm->__base);
796 flist_add(&fm->list, &list);
799 flist_for_each_safe(n, tmp, &list) {
800 unsigned long long sz;
802 fm = flist_entry(n, struct fio_mount, list);
803 flist_del(&fm->list);
805 sz = get_fs_free_size(fm->base);
806 if (sz && sz != -1ULL)
815 uint64_t get_start_offset(struct thread_data *td, struct fio_file *f)
817 struct thread_options *o = &td->o;
819 if (o->file_append && f->filetype == FIO_TYPE_FILE)
820 return f->real_file_size;
822 return td->o.start_offset +
823 td->subjob_number * td->o.offset_increment;
827 * Open the files and setup files sizes, creating files if necessary.
829 int setup_files(struct thread_data *td)
831 unsigned long long total_size, extend_size;
832 struct thread_options *o = &td->o;
834 unsigned int i, nr_fs_extra = 0;
835 int err = 0, need_extend;
837 const unsigned int bs = td_min_bs(td);
840 dprint(FD_FILE, "setup files\n");
842 old_state = td_bump_runstate(td, TD_SETTING_UP);
844 if (o->read_iolog_file)
848 * Find out physical size of files or devices for this thread,
849 * before we determine I/O size and range of our targets.
850 * If ioengine defines a setup() method, it's responsible for
851 * opening the files and setting f->real_file_size to indicate
852 * the valid range for that file.
854 if (td->io_ops->setup)
855 err = td->io_ops->setup(td);
857 err = get_file_sizes(td);
863 * check sizes. if the files/devices do not exist and the size
864 * isn't passed to fio, abort.
867 for_each_file(td, f, i) {
869 if (f->real_file_size == -1ULL)
872 total_size += f->real_file_size;
876 td->fill_device_size = get_fs_free_counts(td);
879 * device/file sizes are zero and no size given, punt
881 if ((!total_size || total_size == -1ULL) && !o->size &&
882 !td_ioengine_flagged(td, FIO_NOIO) && !o->fill_device &&
883 !(o->nr_files && (o->file_size_low || o->file_size_high))) {
884 log_err("%s: you need to specify size=\n", o->name);
885 td_verror(td, EINVAL, "total_file_size");
890 * Calculate per-file size and potential extra size for the
891 * first files, if needed (i.e. if we don't have a fixed size).
893 if (!o->file_size_low && o->nr_files) {
896 fs = o->size / o->nr_files;
897 all_fs = fs * o->nr_files;
899 if (all_fs < o->size)
900 nr_fs_extra = (o->size - all_fs) / bs;
904 * now file sizes are known, so we can set ->io_size. if size= is
905 * not given, ->io_size is just equal to ->real_file_size. if size
906 * is given, ->io_size is size / nr_files.
908 extend_size = total_size = 0;
910 for_each_file(td, f, i) {
911 f->file_offset = get_start_offset(td, f);
914 * Update ->io_size depending on options specified.
915 * ->file_size_low being 0 means filesize option isn't set.
916 * Non zero ->file_size_low equals ->file_size_high means
917 * filesize option is set in a fixed size format.
918 * Non zero ->file_size_low not equals ->file_size_high means
919 * filesize option is set in a range format.
921 if (!o->file_size_low) {
923 * no file size or range given, file size is equal to
924 * total size divided by number of files. If the size
925 * doesn't divide nicely with the min blocksize,
926 * make the first files bigger.
935 * We normally don't come here for regular files, but
936 * if the result is 0 for a regular file, set it to the
937 * real file size. This could be size of the existing
938 * one if it already exists, but otherwise will be set
939 * to 0. A new file won't be created because
940 * ->io_size + ->file_offset equals ->real_file_size.
943 if (f->file_offset > f->real_file_size)
945 f->io_size = f->real_file_size - f->file_offset;
947 log_info("fio: file %s may be ignored\n",
950 } else if (f->real_file_size < o->file_size_low ||
951 f->real_file_size > o->file_size_high) {
952 if (f->file_offset > o->file_size_low)
955 * file size given. if it's fixed, use that. if it's a
956 * range, generate a random size in-between.
958 if (o->file_size_low == o->file_size_high)
959 f->io_size = o->file_size_low - f->file_offset;
961 f->io_size = get_rand_file_size(td)
965 f->io_size = f->real_file_size - f->file_offset;
967 if (f->io_size == -1ULL)
970 if (o->size_percent) {
971 f->io_size = (f->io_size * o->size_percent) / 100;
972 f->io_size -= (f->io_size % td_min_bs(td));
974 total_size += f->io_size;
977 if (f->filetype == FIO_TYPE_FILE &&
978 (f->io_size + f->file_offset) > f->real_file_size &&
979 !td_ioengine_flagged(td, FIO_DISKLESSIO)) {
980 if (!o->create_on_open) {
982 extend_size += (f->io_size + f->file_offset);
983 fio_file_set_extend(f);
985 f->real_file_size = f->io_size + f->file_offset;
989 if (td->o.block_error_hist) {
992 assert(td->o.nr_files == 1); /* checked in fixup_options */
994 len = f->io_size / td->o.bs[DDIR_TRIM];
995 if (len > MAX_NR_BLOCK_INFOS || len <= 0) {
996 log_err("fio: cannot calculate block histogram with "
997 "%d trim blocks, maximum %d\n",
998 len, MAX_NR_BLOCK_INFOS);
999 td_verror(td, EINVAL, "block_error_hist");
1003 td->ts.nr_block_infos = len;
1004 for (i = 0; i < len; i++)
1005 td->ts.block_infos[i] =
1006 BLOCK_INFO(0, BLOCK_STATE_UNINIT);
1008 td->ts.nr_block_infos = 0;
1010 if (!o->size || (total_size && o->size > total_size))
1011 o->size = total_size;
1013 if (o->size < td_min_bs(td)) {
1014 log_err("fio: blocksize too large for data set\n");
1019 * See if we need to extend some files, typically needed when our
1020 * target regular files don't exist yet, but our jobs require them
1021 * initially due to read I/Os.
1025 if (output_format & FIO_OUTPUT_NORMAL) {
1026 log_info("%s: Laying out IO file%s (%u file%s / %s%lluMiB)\n",
1028 need_extend > 1 ? "s" : "",
1030 need_extend > 1 ? "s" : "",
1031 need_extend > 1 ? "total " : "",
1035 for_each_file(td, f, i) {
1036 unsigned long long old_len = -1ULL, extend_len = -1ULL;
1038 if (!fio_file_extend(f))
1041 assert(f->filetype == FIO_TYPE_FILE);
1042 fio_file_clear_extend(f);
1043 if (!o->fill_device) {
1044 old_len = f->real_file_size;
1045 extend_len = f->io_size + f->file_offset -
1048 f->real_file_size = (f->io_size + f->file_offset);
1049 err = extend_file(td, f);
1053 err = __file_invalidate_cache(td, f, old_len,
1057 * Shut up static checker
1073 o->zone_size = o->size;
1076 * iolog already set the total io size, if we read back
1079 if (!o->read_iolog_file) {
1081 td->total_io_size = o->io_size * o->loops;
1083 td->total_io_size = o->size * o->loops;
1090 td_restore_runstate(td, old_state);
1093 log_err("%s: you need to specify valid offset=\n", o->name);
1095 td_restore_runstate(td, old_state);
1099 int pre_read_files(struct thread_data *td)
1104 dprint(FD_FILE, "pre_read files\n");
1106 for_each_file(td, f, i) {
1107 pre_read_file(td, f);
1113 static int __init_rand_distribution(struct thread_data *td, struct fio_file *f)
1115 unsigned int range_size, seed;
1116 unsigned long nranges;
1119 range_size = min(td->o.min_bs[DDIR_READ], td->o.min_bs[DDIR_WRITE]);
1120 fsize = min(f->real_file_size, f->io_size);
1122 nranges = (fsize + range_size - 1) / range_size;
1124 seed = jhash(f->file_name, strlen(f->file_name), 0) * td->thread_number;
1125 if (!td->o.rand_repeatable)
1126 seed = td->rand_seeds[4];
1128 if (td->o.random_distribution == FIO_RAND_DIST_ZIPF)
1129 zipf_init(&f->zipf, nranges, td->o.zipf_theta.u.f, seed);
1130 else if (td->o.random_distribution == FIO_RAND_DIST_PARETO)
1131 pareto_init(&f->zipf, nranges, td->o.pareto_h.u.f, seed);
1132 else if (td->o.random_distribution == FIO_RAND_DIST_GAUSS)
1133 gauss_init(&f->gauss, nranges, td->o.gauss_dev.u.f, seed);
1138 static int init_rand_distribution(struct thread_data *td)
1144 if (td->o.random_distribution == FIO_RAND_DIST_RANDOM)
1147 state = td_bump_runstate(td, TD_SETTING_UP);
1149 for_each_file(td, f, i)
1150 __init_rand_distribution(td, f);
1152 td_restore_runstate(td, state);
1158 * Check if the number of blocks exceeds the randomness capability of
1159 * the selected generator. Tausworthe is 32-bit, the others are fullly
1162 static int check_rand_gen_limits(struct thread_data *td, struct fio_file *f,
1165 if (blocks <= FRAND32_MAX)
1167 if (td->o.random_generator != FIO_RAND_GEN_TAUSWORTHE)
1171 * If the user hasn't specified a random generator, switch
1172 * to tausworthe64 with informational warning. If the user did
1173 * specify one, just warn.
1175 log_info("fio: file %s exceeds 32-bit tausworthe random generator.\n",
1178 if (!fio_option_is_set(&td->o, random_generator)) {
1179 log_info("fio: Switching to tausworthe64. Use the "
1180 "random_generator= option to get rid of this "
1182 td->o.random_generator = FIO_RAND_GEN_TAUSWORTHE64;
1187 * Just make this information to avoid breaking scripts.
1189 log_info("fio: Use the random_generator= option to switch to lfsr or "
1194 int init_random_map(struct thread_data *td)
1196 unsigned long long blocks;
1200 if (init_rand_distribution(td))
1205 for_each_file(td, f, i) {
1206 uint64_t fsize = min(f->real_file_size, f->io_size);
1208 blocks = fsize / (unsigned long long) td->o.rw_min_bs;
1210 if (check_rand_gen_limits(td, f, blocks))
1213 if (td->o.random_generator == FIO_RAND_GEN_LFSR) {
1216 seed = td->rand_seeds[FIO_RAND_BLOCK_OFF];
1218 if (!lfsr_init(&f->lfsr, blocks, seed, 0)) {
1219 fio_file_set_lfsr(f);
1222 } else if (!td->o.norandommap) {
1223 f->io_axmap = axmap_new(blocks);
1225 fio_file_set_axmap(f);
1228 } else if (td->o.norandommap)
1231 if (!td->o.softrandommap) {
1232 log_err("fio: failed allocating random map. If running"
1233 " a large number of jobs, try the 'norandommap'"
1234 " option or set 'softrandommap'. Or give"
1235 " a larger --alloc-size to fio.\n");
1239 log_info("fio: file %s failed allocating random map. Running "
1240 "job without.\n", f->file_name);
1246 void close_files(struct thread_data *td)
1251 for_each_file(td, f, i) {
1252 if (fio_file_open(f))
1253 td_io_close_file(td, f);
1257 void close_and_free_files(struct thread_data *td)
1262 dprint(FD_FILE, "close files\n");
1264 for_each_file(td, f, i) {
1265 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
1266 dprint(FD_FILE, "free unlink %s\n", f->file_name);
1267 td_io_unlink_file(td, f);
1270 if (fio_file_open(f))
1271 td_io_close_file(td, f);
1273 remove_file_hash(f);
1275 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
1276 dprint(FD_FILE, "free unlink %s\n", f->file_name);
1277 td_io_unlink_file(td, f);
1280 sfree(f->file_name);
1281 f->file_name = NULL;
1282 if (fio_file_axmap(f)) {
1283 axmap_free(f->io_axmap);
1289 td->o.filename = NULL;
1291 free(td->file_locks);
1292 td->files_index = 0;
1294 td->file_locks = NULL;
1295 td->o.file_lock_mode = FILE_LOCK_NONE;
1299 static void get_file_type(struct fio_file *f)
1303 if (!strcmp(f->file_name, "-"))
1304 f->filetype = FIO_TYPE_PIPE;
1306 f->filetype = FIO_TYPE_FILE;
1309 /* \\.\ is the device namespace in Windows, where every file is
1311 if (strncmp(f->file_name, "\\\\.\\", 4) == 0)
1312 f->filetype = FIO_TYPE_BLOCK;
1315 if (!stat(f->file_name, &sb)) {
1316 if (S_ISBLK(sb.st_mode))
1317 f->filetype = FIO_TYPE_BLOCK;
1318 else if (S_ISCHR(sb.st_mode))
1319 f->filetype = FIO_TYPE_CHAR;
1320 else if (S_ISFIFO(sb.st_mode))
1321 f->filetype = FIO_TYPE_PIPE;
1325 static bool __is_already_allocated(const char *fname, bool set)
1327 struct flist_head *entry;
1330 ret = file_bloom_exists(fname, set);
1334 flist_for_each(entry, &filename_list) {
1335 struct file_name *fn;
1337 fn = flist_entry(entry, struct file_name, list);
1339 if (!strcmp(fn->filename, fname))
1346 static bool is_already_allocated(const char *fname)
1350 fio_file_hash_lock();
1351 ret = __is_already_allocated(fname, false);
1352 fio_file_hash_unlock();
1357 static void set_already_allocated(const char *fname)
1359 struct file_name *fn;
1361 fn = malloc(sizeof(struct file_name));
1362 fn->filename = strdup(fname);
1364 fio_file_hash_lock();
1365 if (!__is_already_allocated(fname, true)) {
1366 flist_add_tail(&fn->list, &filename_list);
1369 fio_file_hash_unlock();
1377 static void free_already_allocated(void)
1379 struct flist_head *entry, *tmp;
1380 struct file_name *fn;
1382 if (flist_empty(&filename_list))
1385 fio_file_hash_lock();
1386 flist_for_each_safe(entry, tmp, &filename_list) {
1387 fn = flist_entry(entry, struct file_name, list);
1389 flist_del(&fn->list);
1393 fio_file_hash_unlock();
1396 static struct fio_file *alloc_new_file(struct thread_data *td)
1400 f = smalloc(sizeof(*f));
1408 fio_file_reset(td, f);
1412 bool exists_and_not_regfile(const char *filename)
1416 if (lstat(filename, &sb) == -1)
1419 #ifndef WIN32 /* NOT Windows */
1420 if (S_ISREG(sb.st_mode))
1423 /* \\.\ is the device namespace in Windows, where every file
1424 * is a device node */
1425 if (S_ISREG(sb.st_mode) && strncmp(filename, "\\\\.\\", 4) != 0)
1432 int add_file(struct thread_data *td, const char *fname, int numjob, int inc)
1434 int cur_files = td->files_index;
1435 char file_name[PATH_MAX];
1439 dprint(FD_FILE, "add file %s\n", fname);
1441 if (td->o.directory)
1442 len = set_name_idx(file_name, PATH_MAX, td->o.directory, numjob,
1443 td->o.unique_filename);
1445 sprintf(file_name + len, "%s", fname);
1447 /* clean cloned siblings using existing files */
1448 if (numjob && is_already_allocated(file_name) &&
1449 !exists_and_not_regfile(fname))
1452 f = alloc_new_file(td);
1454 if (td->files_size <= td->files_index) {
1455 unsigned int new_size = td->o.nr_files + 1;
1457 dprint(FD_FILE, "resize file array to %d files\n", new_size);
1459 td->files = realloc(td->files, new_size * sizeof(f));
1460 if (td->files == NULL) {
1461 log_err("fio: realloc OOM\n");
1464 if (td->o.file_lock_mode != FILE_LOCK_NONE) {
1465 td->file_locks = realloc(td->file_locks, new_size);
1466 if (!td->file_locks) {
1467 log_err("fio: realloc OOM\n");
1470 td->file_locks[cur_files] = FILE_LOCK_NONE;
1472 td->files_size = new_size;
1474 td->files[cur_files] = f;
1475 f->fileno = cur_files;
1478 * init function, io engine may not be loaded yet
1480 if (td->io_ops && td_ioengine_flagged(td, FIO_DISKLESSIO))
1481 f->real_file_size = -1ULL;
1483 f->file_name = smalloc_strdup(file_name);
1489 switch (td->o.file_lock_mode) {
1490 case FILE_LOCK_NONE:
1492 case FILE_LOCK_READWRITE:
1493 f->rwlock = fio_rwlock_init();
1495 case FILE_LOCK_EXCLUSIVE:
1496 f->lock = fio_mutex_init(FIO_MUTEX_UNLOCKED);
1499 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
1504 if (f->filetype == FIO_TYPE_FILE)
1505 td->nr_normal_files++;
1507 set_already_allocated(file_name);
1512 dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name,
1518 int add_file_exclusive(struct thread_data *td, const char *fname)
1523 for_each_file(td, f, i) {
1524 if (!strcmp(f->file_name, fname))
1528 return add_file(td, fname, 0, 1);
1531 void get_file(struct fio_file *f)
1533 dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
1534 assert(fio_file_open(f));
1538 int put_file(struct thread_data *td, struct fio_file *f)
1540 int f_ret = 0, ret = 0;
1542 dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
1544 if (!fio_file_open(f)) {
1545 assert(f->fd == -1);
1549 assert(f->references);
1550 if (--f->references)
1553 if (should_fsync(td) && td->o.fsync_on_close) {
1554 f_ret = fsync(f->fd);
1559 if (td->io_ops->close_file)
1560 ret = td->io_ops->close_file(td, f);
1565 td->nr_open_files--;
1566 fio_file_clear_open(f);
1567 assert(f->fd == -1);
1571 void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
1573 if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1576 if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
1577 if (ddir == DDIR_READ)
1578 fio_rwlock_read(f->rwlock);
1580 fio_rwlock_write(f->rwlock);
1581 } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1582 fio_mutex_down(f->lock);
1584 td->file_locks[f->fileno] = td->o.file_lock_mode;
1587 void unlock_file(struct thread_data *td, struct fio_file *f)
1589 if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1592 if (td->o.file_lock_mode == FILE_LOCK_READWRITE)
1593 fio_rwlock_unlock(f->rwlock);
1594 else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1595 fio_mutex_up(f->lock);
1597 td->file_locks[f->fileno] = FILE_LOCK_NONE;
1600 void unlock_file_all(struct thread_data *td, struct fio_file *f)
1602 if (td->o.file_lock_mode == FILE_LOCK_NONE || !td->file_locks)
1604 if (td->file_locks[f->fileno] != FILE_LOCK_NONE)
1608 static int recurse_dir(struct thread_data *td, const char *dirname)
1614 D = opendir(dirname);
1616 char buf[FIO_VERROR_SIZE];
1618 snprintf(buf, FIO_VERROR_SIZE, "opendir(%s)", dirname);
1619 td_verror(td, errno, buf);
1623 while ((dir = readdir(D)) != NULL) {
1624 char full_path[PATH_MAX];
1627 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
1630 sprintf(full_path, "%s%s%s", dirname, FIO_OS_PATH_SEPARATOR, dir->d_name);
1632 if (lstat(full_path, &sb) == -1) {
1633 if (errno != ENOENT) {
1634 td_verror(td, errno, "stat");
1640 if (S_ISREG(sb.st_mode)) {
1641 add_file(td, full_path, 0, 1);
1644 if (!S_ISDIR(sb.st_mode))
1647 ret = recurse_dir(td, full_path);
1656 int add_dir_files(struct thread_data *td, const char *path)
1658 int ret = recurse_dir(td, path);
1661 log_info("fio: opendir added %d files\n", td->o.nr_files);
1666 void dup_files(struct thread_data *td, struct thread_data *org)
1671 dprint(FD_FILE, "dup files: %d\n", org->files_index);
1676 td->files = malloc(org->files_index * sizeof(f));
1678 if (td->o.file_lock_mode != FILE_LOCK_NONE)
1679 td->file_locks = malloc(org->files_index);
1681 for_each_file(org, f, i) {
1682 struct fio_file *__f;
1684 __f = alloc_new_file(td);
1687 __f->file_name = smalloc_strdup(f->file_name);
1688 if (!__f->file_name)
1691 __f->filetype = f->filetype;
1694 if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1695 __f->lock = f->lock;
1696 else if (td->o.file_lock_mode == FILE_LOCK_READWRITE)
1697 __f->rwlock = f->rwlock;
1704 * Returns the index that matches the filename, or -1 if not there
1706 int get_fileno(struct thread_data *td, const char *fname)
1711 for_each_file(td, f, i)
1712 if (!strcmp(f->file_name, fname))
1719 * For log usage, where we add/open/close files automatically
1721 void free_release_files(struct thread_data *td)
1725 td->o.open_files = 0;
1726 td->files_index = 0;
1727 td->nr_normal_files = 0;
1730 void fio_file_reset(struct thread_data *td, struct fio_file *f)
1734 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1735 f->last_pos[i] = f->file_offset;
1736 f->last_start[i] = -1ULL;
1739 if (fio_file_axmap(f))
1740 axmap_reset(f->io_axmap);
1741 else if (fio_file_lfsr(f))
1742 lfsr_reset(&f->lfsr, td->rand_seeds[FIO_RAND_BLOCK_OFF]);
1745 bool fio_files_done(struct thread_data *td)
1750 for_each_file(td, f, i)
1751 if (!fio_file_done(f))
1757 /* free memory used in initialization phase only */
1758 void filesetup_mem_free(void)
1760 free_already_allocated();