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 td_verror(td, errno, "malloc");
168 left = f->real_file_size;
169 while (left && !td->terminate) {
170 bs = td->o.max_bs[DDIR_WRITE];
174 fill_io_buffer(td, b, bs, bs);
176 r = write(f->fd, b, bs);
186 if (td->o.fill_device)
188 log_info("fio: ENOSPC on laying out "
192 td_verror(td, errno, "write");
194 td_verror(td, EIO, "write");
201 dprint(FD_FILE, "terminate unlink %s\n", f->file_name);
202 td_io_unlink_file(td, f);
203 } else if (td->o.create_fsync) {
204 if (fsync(f->fd) < 0) {
205 td_verror(td, errno, "fsync");
209 if (td->o.fill_device && !td_write(td)) {
210 fio_file_clear_size_known(f);
211 if (td_io_get_file_size(td, f))
213 if (f->io_size > f->real_file_size)
214 f->io_size = f->real_file_size;
228 static int pre_read_file(struct thread_data *td, struct fio_file *f)
230 int ret = 0, r, did_open = 0, old_runstate;
231 unsigned long long left;
235 if (td_ioengine_flagged(td, FIO_PIPEIO))
238 if (!fio_file_open(f)) {
239 if (td->io_ops->open_file(td, f)) {
240 log_err("fio: cannot pre-read, failed to open file\n");
246 old_runstate = td_bump_runstate(td, TD_PRE_READING);
248 bs = td->o.max_bs[DDIR_READ];
251 td_verror(td, errno, "malloc");
257 if (lseek(f->fd, f->file_offset, SEEK_SET) < 0) {
258 td_verror(td, errno, "lseek");
259 log_err("fio: failed to lseek pre-read file\n");
266 while (left && !td->terminate) {
270 r = read(f->fd, b, bs);
276 td_verror(td, EIO, "pre_read");
282 td_restore_runstate(td, old_runstate);
285 td->io_ops->close_file(td, f);
291 unsigned long long get_rand_file_size(struct thread_data *td)
293 unsigned long long ret, sized;
297 frand_max = rand_max(&td->file_size_state);
298 r = __rand(&td->file_size_state);
299 sized = td->o.file_size_high - td->o.file_size_low;
300 ret = (unsigned long long) ((double) sized * (r / (frand_max + 1.0)));
301 ret += td->o.file_size_low;
302 ret -= (ret % td->o.rw_min_bs);
306 static int file_size(struct thread_data *td, struct fio_file *f)
310 if (stat(f->file_name, &st) == -1) {
311 td_verror(td, errno, "fstat");
315 f->real_file_size = st.st_size;
319 static int bdev_size(struct thread_data *td, struct fio_file *f)
321 unsigned long long bytes = 0;
324 if (td->io_ops->open_file(td, f)) {
325 log_err("fio: failed opening blockdev %s for size check\n",
330 r = blockdev_size(f, &bytes);
332 td_verror(td, r, "blockdev_size");
337 log_err("%s: zero sized block device?\n", f->file_name);
341 f->real_file_size = bytes;
342 td->io_ops->close_file(td, f);
345 td->io_ops->close_file(td, f);
349 static int char_size(struct thread_data *td, struct fio_file *f)
351 #ifdef FIO_HAVE_CHARDEV_SIZE
352 unsigned long long bytes = 0;
355 if (td->io_ops->open_file(td, f)) {
356 log_err("fio: failed opening chardev %s for size check\n",
361 r = chardev_size(f, &bytes);
363 td_verror(td, r, "chardev_size");
368 log_err("%s: zero sized char device?\n", f->file_name);
372 f->real_file_size = bytes;
373 td->io_ops->close_file(td, f);
376 td->io_ops->close_file(td, f);
379 f->real_file_size = -1ULL;
384 static int get_file_size(struct thread_data *td, struct fio_file *f)
388 if (fio_file_size_known(f))
391 if (f->filetype == FIO_TYPE_FILE)
392 ret = file_size(td, f);
393 else if (f->filetype == FIO_TYPE_BLOCK)
394 ret = bdev_size(td, f);
395 else if (f->filetype == FIO_TYPE_CHAR)
396 ret = char_size(td, f);
398 f->real_file_size = -1ULL;
401 * Leave ->real_file_size with 0 since it could be expectation
402 * of initial setup for regular files.
408 * If ->real_file_size is -1, a conditional for the message
409 * "offset extends end" is always true, but it makes no sense,
410 * so just return the same value here.
412 if (f->real_file_size == -1ULL) {
413 log_info("%s: failed to get file size of %s\n", td->o.name,
418 if (td->o.start_offset && f->file_offset == 0)
419 dprint(FD_FILE, "offset of file %s not initialized yet\n",
422 * ->file_offset normally hasn't been initialized yet, so this
423 * is basically always false.
425 if (f->file_offset > f->real_file_size) {
426 log_err("%s: offset extends end (%llu > %llu)\n", td->o.name,
427 (unsigned long long) f->file_offset,
428 (unsigned long long) f->real_file_size);
432 fio_file_set_size_known(f);
436 static int __file_invalidate_cache(struct thread_data *td, struct fio_file *f,
437 unsigned long long off,
438 unsigned long long len)
440 int errval = 0, ret = 0;
449 off = f->file_offset;
451 if (len == -1ULL || off == -1ULL)
454 if (td->io_ops->invalidate) {
455 dprint(FD_IO, "invalidate %s cache %s\n", td->io_ops->name,
457 ret = td->io_ops->invalidate(td, f);
460 } else if (f->filetype == FIO_TYPE_FILE) {
461 dprint(FD_IO, "declare unneeded cache %s: %llu/%llu\n",
462 f->file_name, off, len);
463 ret = posix_fadvise(f->fd, off, len, POSIX_FADV_DONTNEED);
466 } else if (f->filetype == FIO_TYPE_BLOCK) {
469 dprint(FD_IO, "drop page cache %s\n", f->file_name);
470 ret = blockdev_invalidate_cache(f);
471 while (ret < 0 && errno == EAGAIN && retry_count++ < 25) {
473 * Linux multipath devices reject ioctl while
474 * the maps are being updated. That window can
475 * last tens of milliseconds; we'll try up to
476 * a quarter of a second.
479 ret = blockdev_invalidate_cache(f);
481 if (ret < 0 && errno == EACCES && geteuid()) {
483 log_err("fio: only root may flush block "
484 "devices. Cache flush bypassed!\n");
491 else if (ret) /* probably not supported */
493 } else if (f->filetype == FIO_TYPE_CHAR ||
494 f->filetype == FIO_TYPE_PIPE) {
495 dprint(FD_IO, "invalidate not supported %s\n", f->file_name);
500 * Cache flushing isn't a fatal condition, and we know it will
501 * happen on some platforms where we don't have the proper
502 * function to flush eg block device caches. So just warn and
503 * continue on our way.
506 log_info("fio: cache invalidation of %s failed: %s\n",
507 f->file_name, strerror(errval));
513 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
515 if (!fio_file_open(f))
518 return __file_invalidate_cache(td, f, -1ULL, -1ULL);
521 int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
525 dprint(FD_FILE, "fd close %s\n", f->file_name);
529 if (close(f->fd) < 0)
534 if (f->shadow_fd != -1) {
543 int file_lookup_open(struct fio_file *f, int flags)
545 struct fio_file *__f;
548 __f = lookup_file_hash(f->file_name);
550 dprint(FD_FILE, "found file in hash %s\n", f->file_name);
554 dprint(FD_FILE, "file not found in hash %s\n", f->file_name);
562 f->fd = open(f->file_name, flags, 0600);
566 static int file_close_shadow_fds(struct thread_data *td)
572 for_each_file(td, f, i) {
573 if (f->shadow_fd == -1)
584 int generic_open_file(struct thread_data *td, struct fio_file *f)
590 dprint(FD_FILE, "fd open %s\n", f->file_name);
592 if (!strcmp(f->file_name, "-")) {
594 log_err("fio: can't read/write to stdin/out\n");
600 * move output logging to stderr, if we are writing to stdout
609 flags |= OS_O_DIRECT;
612 td_verror(td, EINVAL, "OS does not support atomic IO");
615 flags |= OS_O_DIRECT | FIO_O_ATOMIC;
619 if (td->o.create_on_open && td->o.allow_create)
622 if (f->filetype != FIO_TYPE_FILE)
623 flags |= FIO_O_NOATIME;
630 if (f->filetype == FIO_TYPE_FILE && td->o.allow_create)
634 f->fd = dup(STDOUT_FILENO);
636 from_hash = file_lookup_open(f, flags);
637 } else if (td_read(td)) {
638 if (f->filetype == FIO_TYPE_CHAR && !read_only)
644 f->fd = dup(STDIN_FILENO);
646 from_hash = file_lookup_open(f, flags);
647 } else if (td_trim(td)) {
648 assert(!td_rw(td)); /* should have matched above */
650 from_hash = file_lookup_open(f, flags);
654 char buf[FIO_VERROR_SIZE];
657 if (__e == EPERM && (flags & FIO_O_NOATIME)) {
658 flags &= ~FIO_O_NOATIME;
661 if (__e == EMFILE && file_close_shadow_fds(td))
664 snprintf(buf, sizeof(buf), "open(%s)", f->file_name);
666 if (__e == EINVAL && (flags & OS_O_DIRECT)) {
667 log_err("fio: looks like your file system does not " \
668 "support direct=1/buffered=0\n");
671 td_verror(td, __e, buf);
675 if (!from_hash && f->fd != -1) {
676 if (add_file_hash(f)) {
680 * Stash away descriptor for later close. This is to
681 * work-around a "feature" on Linux, where a close of
682 * an fd that has been opened for write will trigger
683 * udev to call blkid to check partitions, fs id, etc.
684 * That pollutes the device cache, which can slow down
685 * unbuffered accesses.
687 if (f->shadow_fd == -1)
688 f->shadow_fd = f->fd;
691 * OK to ignore, we haven't done anything
694 ret = generic_close_file(td, f);
704 * This function i.e. get_file_size() is the default .get_file_size
705 * implementation of majority of I/O engines.
707 int generic_get_file_size(struct thread_data *td, struct fio_file *f)
709 return get_file_size(td, f);
713 * open/close all files, so that ->real_file_size gets set
715 static int get_file_sizes(struct thread_data *td)
721 for_each_file(td, f, i) {
722 dprint(FD_FILE, "get file size for %p/%d/%s\n", f, i,
725 if (td_io_get_file_size(td, f)) {
726 if (td->error != ENOENT) {
727 log_err("%s\n", td->verror);
735 * There are corner cases where we end up with -1 for
736 * ->real_file_size due to unsupported file type, etc.
737 * We then just set to size option value divided by number
738 * of files, similar to the way file ->io_size is set.
739 * stat(2) failure doesn't set ->real_file_size to -1.
741 if (f->real_file_size == -1ULL && td->o.size)
742 f->real_file_size = td->o.size / td->o.nr_files;
749 struct flist_head list;
756 * Get free number of bytes for each file on each unique mount.
758 static unsigned long long get_fs_free_counts(struct thread_data *td)
760 struct flist_head *n, *tmp;
761 unsigned long long ret = 0;
762 struct fio_mount *fm;
767 for_each_file(td, f, i) {
771 if (f->filetype == FIO_TYPE_BLOCK || f->filetype == FIO_TYPE_CHAR) {
772 if (f->real_file_size != -1ULL)
773 ret += f->real_file_size;
775 } else if (f->filetype != FIO_TYPE_FILE)
779 strncpy(buf, f->file_name, 255);
781 if (stat(buf, &sb) < 0) {
785 if (stat(buf, &sb) < 0)
790 flist_for_each(n, &list) {
791 fm = flist_entry(n, struct fio_mount, list);
792 if (fm->key == sb.st_dev)
801 fm = calloc(1, sizeof(*fm));
802 strncpy(fm->__base, buf, sizeof(fm->__base) - 1);
803 fm->base = basename(fm->__base);
805 flist_add(&fm->list, &list);
808 flist_for_each_safe(n, tmp, &list) {
809 unsigned long long sz;
811 fm = flist_entry(n, struct fio_mount, list);
812 flist_del(&fm->list);
814 sz = get_fs_free_size(fm->base);
815 if (sz && sz != -1ULL)
824 uint64_t get_start_offset(struct thread_data *td, struct fio_file *f)
826 struct thread_options *o = &td->o;
828 if (o->file_append && f->filetype == FIO_TYPE_FILE)
829 return f->real_file_size;
831 return td->o.start_offset +
832 td->subjob_number * td->o.offset_increment;
836 * Open the files and setup files sizes, creating files if necessary.
838 int setup_files(struct thread_data *td)
840 unsigned long long total_size, extend_size;
841 struct thread_options *o = &td->o;
843 unsigned int i, nr_fs_extra = 0;
844 int err = 0, need_extend;
846 const unsigned int bs = td_min_bs(td);
849 dprint(FD_FILE, "setup files\n");
851 old_state = td_bump_runstate(td, TD_SETTING_UP);
853 if (o->read_iolog_file)
857 * Find out physical size of files or devices for this thread,
858 * before we determine I/O size and range of our targets.
859 * If ioengine defines a setup() method, it's responsible for
860 * opening the files and setting f->real_file_size to indicate
861 * the valid range for that file.
863 if (td->io_ops->setup)
864 err = td->io_ops->setup(td);
866 err = get_file_sizes(td);
872 * check sizes. if the files/devices do not exist and the size
873 * isn't passed to fio, abort.
876 for_each_file(td, f, i) {
878 if (f->real_file_size == -1ULL)
881 total_size += f->real_file_size;
885 td->fill_device_size = get_fs_free_counts(td);
888 * device/file sizes are zero and no size given, punt
890 if ((!total_size || total_size == -1ULL) && !o->size &&
891 !td_ioengine_flagged(td, FIO_NOIO) && !o->fill_device &&
892 !(o->nr_files && (o->file_size_low || o->file_size_high))) {
893 log_err("%s: you need to specify size=\n", o->name);
894 td_verror(td, EINVAL, "total_file_size");
899 * Calculate per-file size and potential extra size for the
900 * first files, if needed (i.e. if we don't have a fixed size).
902 if (!o->file_size_low && o->nr_files) {
905 fs = o->size / o->nr_files;
906 all_fs = fs * o->nr_files;
908 if (all_fs < o->size)
909 nr_fs_extra = (o->size - all_fs) / bs;
913 * now file sizes are known, so we can set ->io_size. if size= is
914 * not given, ->io_size is just equal to ->real_file_size. if size
915 * is given, ->io_size is size / nr_files.
917 extend_size = total_size = 0;
919 for_each_file(td, f, i) {
920 f->file_offset = get_start_offset(td, f);
923 * Update ->io_size depending on options specified.
924 * ->file_size_low being 0 means filesize option isn't set.
925 * Non zero ->file_size_low equals ->file_size_high means
926 * filesize option is set in a fixed size format.
927 * Non zero ->file_size_low not equals ->file_size_high means
928 * filesize option is set in a range format.
930 if (!o->file_size_low) {
932 * no file size or range given, file size is equal to
933 * total size divided by number of files. If the size
934 * doesn't divide nicely with the min blocksize,
935 * make the first files bigger.
944 * We normally don't come here for regular files, but
945 * if the result is 0 for a regular file, set it to the
946 * real file size. This could be size of the existing
947 * one if it already exists, but otherwise will be set
948 * to 0. A new file won't be created because
949 * ->io_size + ->file_offset equals ->real_file_size.
952 if (f->file_offset > f->real_file_size)
954 f->io_size = f->real_file_size - f->file_offset;
956 log_info("fio: file %s may be ignored\n",
959 } else if (f->real_file_size < o->file_size_low ||
960 f->real_file_size > o->file_size_high) {
961 if (f->file_offset > o->file_size_low)
964 * file size given. if it's fixed, use that. if it's a
965 * range, generate a random size in-between.
967 if (o->file_size_low == o->file_size_high)
968 f->io_size = o->file_size_low - f->file_offset;
970 f->io_size = get_rand_file_size(td)
974 f->io_size = f->real_file_size - f->file_offset;
976 if (f->io_size == -1ULL)
979 if (o->size_percent) {
980 f->io_size = (f->io_size * o->size_percent) / 100;
981 f->io_size -= (f->io_size % td_min_bs(td));
983 total_size += f->io_size;
986 if (f->filetype == FIO_TYPE_FILE &&
987 (f->io_size + f->file_offset) > f->real_file_size &&
988 !td_ioengine_flagged(td, FIO_DISKLESSIO)) {
989 if (!o->create_on_open) {
991 extend_size += (f->io_size + f->file_offset);
992 fio_file_set_extend(f);
994 f->real_file_size = f->io_size + f->file_offset;
998 if (td->o.block_error_hist) {
1001 assert(td->o.nr_files == 1); /* checked in fixup_options */
1003 len = f->io_size / td->o.bs[DDIR_TRIM];
1004 if (len > MAX_NR_BLOCK_INFOS || len <= 0) {
1005 log_err("fio: cannot calculate block histogram with "
1006 "%d trim blocks, maximum %d\n",
1007 len, MAX_NR_BLOCK_INFOS);
1008 td_verror(td, EINVAL, "block_error_hist");
1012 td->ts.nr_block_infos = len;
1013 for (i = 0; i < len; i++)
1014 td->ts.block_infos[i] =
1015 BLOCK_INFO(0, BLOCK_STATE_UNINIT);
1017 td->ts.nr_block_infos = 0;
1019 if (!o->size || (total_size && o->size > total_size))
1020 o->size = total_size;
1022 if (o->size < td_min_bs(td)) {
1023 log_err("fio: blocksize too large for data set\n");
1028 * See if we need to extend some files, typically needed when our
1029 * target regular files don't exist yet, but our jobs require them
1030 * initially due to read I/Os.
1034 if (output_format & FIO_OUTPUT_NORMAL) {
1035 log_info("%s: Laying out IO file%s (%u file%s / %s%lluMiB)\n",
1037 need_extend > 1 ? "s" : "",
1039 need_extend > 1 ? "s" : "",
1040 need_extend > 1 ? "total " : "",
1044 for_each_file(td, f, i) {
1045 unsigned long long old_len = -1ULL, extend_len = -1ULL;
1047 if (!fio_file_extend(f))
1050 assert(f->filetype == FIO_TYPE_FILE);
1051 fio_file_clear_extend(f);
1052 if (!o->fill_device) {
1053 old_len = f->real_file_size;
1054 extend_len = f->io_size + f->file_offset -
1057 f->real_file_size = (f->io_size + f->file_offset);
1058 err = extend_file(td, f);
1062 err = __file_invalidate_cache(td, f, old_len,
1066 * Shut up static checker
1082 o->zone_size = o->size;
1085 * iolog already set the total io size, if we read back
1088 if (!o->read_iolog_file) {
1090 td->total_io_size = o->io_size * o->loops;
1092 td->total_io_size = o->size * o->loops;
1099 td_restore_runstate(td, old_state);
1102 log_err("%s: you need to specify valid offset=\n", o->name);
1104 td_restore_runstate(td, old_state);
1108 int pre_read_files(struct thread_data *td)
1113 dprint(FD_FILE, "pre_read files\n");
1115 for_each_file(td, f, i) {
1116 pre_read_file(td, f);
1122 static int __init_rand_distribution(struct thread_data *td, struct fio_file *f)
1124 unsigned int range_size, seed;
1125 unsigned long nranges;
1128 range_size = min(td->o.min_bs[DDIR_READ], td->o.min_bs[DDIR_WRITE]);
1129 fsize = min(f->real_file_size, f->io_size);
1131 nranges = (fsize + range_size - 1) / range_size;
1133 seed = jhash(f->file_name, strlen(f->file_name), 0) * td->thread_number;
1134 if (!td->o.rand_repeatable)
1135 seed = td->rand_seeds[4];
1137 if (td->o.random_distribution == FIO_RAND_DIST_ZIPF)
1138 zipf_init(&f->zipf, nranges, td->o.zipf_theta.u.f, seed);
1139 else if (td->o.random_distribution == FIO_RAND_DIST_PARETO)
1140 pareto_init(&f->zipf, nranges, td->o.pareto_h.u.f, seed);
1141 else if (td->o.random_distribution == FIO_RAND_DIST_GAUSS)
1142 gauss_init(&f->gauss, nranges, td->o.gauss_dev.u.f, seed);
1147 static int init_rand_distribution(struct thread_data *td)
1153 if (td->o.random_distribution == FIO_RAND_DIST_RANDOM)
1156 state = td_bump_runstate(td, TD_SETTING_UP);
1158 for_each_file(td, f, i)
1159 __init_rand_distribution(td, f);
1161 td_restore_runstate(td, state);
1167 * Check if the number of blocks exceeds the randomness capability of
1168 * the selected generator. Tausworthe is 32-bit, the others are fullly
1171 static int check_rand_gen_limits(struct thread_data *td, struct fio_file *f,
1174 if (blocks <= FRAND32_MAX)
1176 if (td->o.random_generator != FIO_RAND_GEN_TAUSWORTHE)
1180 * If the user hasn't specified a random generator, switch
1181 * to tausworthe64 with informational warning. If the user did
1182 * specify one, just warn.
1184 log_info("fio: file %s exceeds 32-bit tausworthe random generator.\n",
1187 if (!fio_option_is_set(&td->o, random_generator)) {
1188 log_info("fio: Switching to tausworthe64. Use the "
1189 "random_generator= option to get rid of this "
1191 td->o.random_generator = FIO_RAND_GEN_TAUSWORTHE64;
1196 * Just make this information to avoid breaking scripts.
1198 log_info("fio: Use the random_generator= option to switch to lfsr or "
1203 int init_random_map(struct thread_data *td)
1205 unsigned long long blocks;
1209 if (init_rand_distribution(td))
1214 for_each_file(td, f, i) {
1215 uint64_t fsize = min(f->real_file_size, f->io_size);
1217 blocks = fsize / (unsigned long long) td->o.rw_min_bs;
1219 if (check_rand_gen_limits(td, f, blocks))
1222 if (td->o.random_generator == FIO_RAND_GEN_LFSR) {
1225 seed = td->rand_seeds[FIO_RAND_BLOCK_OFF];
1227 if (!lfsr_init(&f->lfsr, blocks, seed, 0)) {
1228 fio_file_set_lfsr(f);
1231 } else if (!td->o.norandommap) {
1232 f->io_axmap = axmap_new(blocks);
1234 fio_file_set_axmap(f);
1237 } else if (td->o.norandommap)
1240 if (!td->o.softrandommap) {
1241 log_err("fio: failed allocating random map. If running"
1242 " a large number of jobs, try the 'norandommap'"
1243 " option or set 'softrandommap'. Or give"
1244 " a larger --alloc-size to fio.\n");
1248 log_info("fio: file %s failed allocating random map. Running "
1249 "job without.\n", f->file_name);
1255 void close_files(struct thread_data *td)
1260 for_each_file(td, f, i) {
1261 if (fio_file_open(f))
1262 td_io_close_file(td, f);
1266 void close_and_free_files(struct thread_data *td)
1271 dprint(FD_FILE, "close files\n");
1273 for_each_file(td, f, i) {
1274 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
1275 dprint(FD_FILE, "free unlink %s\n", f->file_name);
1276 td_io_unlink_file(td, f);
1279 if (fio_file_open(f))
1280 td_io_close_file(td, f);
1282 remove_file_hash(f);
1284 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
1285 dprint(FD_FILE, "free unlink %s\n", f->file_name);
1286 td_io_unlink_file(td, f);
1289 sfree(f->file_name);
1290 f->file_name = NULL;
1291 if (fio_file_axmap(f)) {
1292 axmap_free(f->io_axmap);
1298 td->o.filename = NULL;
1300 free(td->file_locks);
1301 td->files_index = 0;
1303 td->file_locks = NULL;
1304 td->o.file_lock_mode = FILE_LOCK_NONE;
1308 static void get_file_type(struct fio_file *f)
1312 if (!strcmp(f->file_name, "-"))
1313 f->filetype = FIO_TYPE_PIPE;
1315 f->filetype = FIO_TYPE_FILE;
1318 /* \\.\ is the device namespace in Windows, where every file is
1320 if (strncmp(f->file_name, "\\\\.\\", 4) == 0)
1321 f->filetype = FIO_TYPE_BLOCK;
1324 if (!stat(f->file_name, &sb)) {
1325 if (S_ISBLK(sb.st_mode))
1326 f->filetype = FIO_TYPE_BLOCK;
1327 else if (S_ISCHR(sb.st_mode))
1328 f->filetype = FIO_TYPE_CHAR;
1329 else if (S_ISFIFO(sb.st_mode))
1330 f->filetype = FIO_TYPE_PIPE;
1334 static bool __is_already_allocated(const char *fname, bool set)
1336 struct flist_head *entry;
1339 ret = file_bloom_exists(fname, set);
1343 flist_for_each(entry, &filename_list) {
1344 struct file_name *fn;
1346 fn = flist_entry(entry, struct file_name, list);
1348 if (!strcmp(fn->filename, fname))
1355 static bool is_already_allocated(const char *fname)
1359 fio_file_hash_lock();
1360 ret = __is_already_allocated(fname, false);
1361 fio_file_hash_unlock();
1366 static void set_already_allocated(const char *fname)
1368 struct file_name *fn;
1370 fn = malloc(sizeof(struct file_name));
1371 fn->filename = strdup(fname);
1373 fio_file_hash_lock();
1374 if (!__is_already_allocated(fname, true)) {
1375 flist_add_tail(&fn->list, &filename_list);
1378 fio_file_hash_unlock();
1386 static void free_already_allocated(void)
1388 struct flist_head *entry, *tmp;
1389 struct file_name *fn;
1391 if (flist_empty(&filename_list))
1394 fio_file_hash_lock();
1395 flist_for_each_safe(entry, tmp, &filename_list) {
1396 fn = flist_entry(entry, struct file_name, list);
1398 flist_del(&fn->list);
1402 fio_file_hash_unlock();
1405 static struct fio_file *alloc_new_file(struct thread_data *td)
1409 f = smalloc(sizeof(*f));
1417 fio_file_reset(td, f);
1421 bool exists_and_not_regfile(const char *filename)
1425 if (lstat(filename, &sb) == -1)
1428 #ifndef WIN32 /* NOT Windows */
1429 if (S_ISREG(sb.st_mode))
1432 /* \\.\ is the device namespace in Windows, where every file
1433 * is a device node */
1434 if (S_ISREG(sb.st_mode) && strncmp(filename, "\\\\.\\", 4) != 0)
1441 int add_file(struct thread_data *td, const char *fname, int numjob, int inc)
1443 int cur_files = td->files_index;
1444 char file_name[PATH_MAX];
1448 dprint(FD_FILE, "add file %s\n", fname);
1450 if (td->o.directory)
1451 len = set_name_idx(file_name, PATH_MAX, td->o.directory, numjob,
1452 td->o.unique_filename);
1454 sprintf(file_name + len, "%s", fname);
1456 /* clean cloned siblings using existing files */
1457 if (numjob && is_already_allocated(file_name) &&
1458 !exists_and_not_regfile(fname))
1461 f = alloc_new_file(td);
1463 if (td->files_size <= td->files_index) {
1464 unsigned int new_size = td->o.nr_files + 1;
1466 dprint(FD_FILE, "resize file array to %d files\n", new_size);
1468 td->files = realloc(td->files, new_size * sizeof(f));
1469 if (td->files == NULL) {
1470 log_err("fio: realloc OOM\n");
1473 if (td->o.file_lock_mode != FILE_LOCK_NONE) {
1474 td->file_locks = realloc(td->file_locks, new_size);
1475 if (!td->file_locks) {
1476 log_err("fio: realloc OOM\n");
1479 td->file_locks[cur_files] = FILE_LOCK_NONE;
1481 td->files_size = new_size;
1483 td->files[cur_files] = f;
1484 f->fileno = cur_files;
1487 * init function, io engine may not be loaded yet
1489 if (td->io_ops && td_ioengine_flagged(td, FIO_DISKLESSIO))
1490 f->real_file_size = -1ULL;
1492 f->file_name = smalloc_strdup(file_name);
1498 switch (td->o.file_lock_mode) {
1499 case FILE_LOCK_NONE:
1501 case FILE_LOCK_READWRITE:
1502 f->rwlock = fio_rwlock_init();
1504 case FILE_LOCK_EXCLUSIVE:
1505 f->lock = fio_mutex_init(FIO_MUTEX_UNLOCKED);
1508 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
1513 if (f->filetype == FIO_TYPE_FILE)
1514 td->nr_normal_files++;
1516 set_already_allocated(file_name);
1521 dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name,
1527 int add_file_exclusive(struct thread_data *td, const char *fname)
1532 for_each_file(td, f, i) {
1533 if (!strcmp(f->file_name, fname))
1537 return add_file(td, fname, 0, 1);
1540 void get_file(struct fio_file *f)
1542 dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
1543 assert(fio_file_open(f));
1547 int put_file(struct thread_data *td, struct fio_file *f)
1549 int f_ret = 0, ret = 0;
1551 dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
1553 if (!fio_file_open(f)) {
1554 assert(f->fd == -1);
1558 assert(f->references);
1559 if (--f->references)
1562 if (should_fsync(td) && td->o.fsync_on_close) {
1563 f_ret = fsync(f->fd);
1568 if (td->io_ops->close_file)
1569 ret = td->io_ops->close_file(td, f);
1574 td->nr_open_files--;
1575 fio_file_clear_open(f);
1576 assert(f->fd == -1);
1580 void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
1582 if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1585 if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
1586 if (ddir == DDIR_READ)
1587 fio_rwlock_read(f->rwlock);
1589 fio_rwlock_write(f->rwlock);
1590 } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1591 fio_mutex_down(f->lock);
1593 td->file_locks[f->fileno] = td->o.file_lock_mode;
1596 void unlock_file(struct thread_data *td, struct fio_file *f)
1598 if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1601 if (td->o.file_lock_mode == FILE_LOCK_READWRITE)
1602 fio_rwlock_unlock(f->rwlock);
1603 else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1604 fio_mutex_up(f->lock);
1606 td->file_locks[f->fileno] = FILE_LOCK_NONE;
1609 void unlock_file_all(struct thread_data *td, struct fio_file *f)
1611 if (td->o.file_lock_mode == FILE_LOCK_NONE || !td->file_locks)
1613 if (td->file_locks[f->fileno] != FILE_LOCK_NONE)
1617 static int recurse_dir(struct thread_data *td, const char *dirname)
1623 D = opendir(dirname);
1625 char buf[FIO_VERROR_SIZE];
1627 snprintf(buf, FIO_VERROR_SIZE, "opendir(%s)", dirname);
1628 td_verror(td, errno, buf);
1632 while ((dir = readdir(D)) != NULL) {
1633 char full_path[PATH_MAX];
1636 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
1639 sprintf(full_path, "%s%s%s", dirname, FIO_OS_PATH_SEPARATOR, dir->d_name);
1641 if (lstat(full_path, &sb) == -1) {
1642 if (errno != ENOENT) {
1643 td_verror(td, errno, "stat");
1649 if (S_ISREG(sb.st_mode)) {
1650 add_file(td, full_path, 0, 1);
1653 if (!S_ISDIR(sb.st_mode))
1656 ret = recurse_dir(td, full_path);
1665 int add_dir_files(struct thread_data *td, const char *path)
1667 int ret = recurse_dir(td, path);
1670 log_info("fio: opendir added %d files\n", td->o.nr_files);
1675 void dup_files(struct thread_data *td, struct thread_data *org)
1680 dprint(FD_FILE, "dup files: %d\n", org->files_index);
1685 td->files = malloc(org->files_index * sizeof(f));
1687 if (td->o.file_lock_mode != FILE_LOCK_NONE)
1688 td->file_locks = malloc(org->files_index);
1690 for_each_file(org, f, i) {
1691 struct fio_file *__f;
1693 __f = alloc_new_file(td);
1696 __f->file_name = smalloc_strdup(f->file_name);
1697 if (!__f->file_name)
1700 __f->filetype = f->filetype;
1703 if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1704 __f->lock = f->lock;
1705 else if (td->o.file_lock_mode == FILE_LOCK_READWRITE)
1706 __f->rwlock = f->rwlock;
1713 * Returns the index that matches the filename, or -1 if not there
1715 int get_fileno(struct thread_data *td, const char *fname)
1720 for_each_file(td, f, i)
1721 if (!strcmp(f->file_name, fname))
1728 * For log usage, where we add/open/close files automatically
1730 void free_release_files(struct thread_data *td)
1734 td->o.open_files = 0;
1735 td->files_index = 0;
1736 td->nr_normal_files = 0;
1739 void fio_file_reset(struct thread_data *td, struct fio_file *f)
1743 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1744 f->last_pos[i] = f->file_offset;
1745 f->last_start[i] = -1ULL;
1748 if (fio_file_axmap(f))
1749 axmap_reset(f->io_axmap);
1750 else if (fio_file_lfsr(f))
1751 lfsr_reset(&f->lfsr, td->rand_seeds[FIO_RAND_BLOCK_OFF]);
1754 bool fio_files_done(struct thread_data *td)
1759 for_each_file(td, f, i)
1760 if (!fio_file_done(f))
1766 /* free memory used in initialization phase only */
1767 void filesetup_mem_free(void)
1769 free_already_allocated();