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 left = f->real_file_size;
163 bs = td->o.max_bs[DDIR_WRITE];
169 td_verror(td, errno, "malloc");
173 while (left && !td->terminate) {
177 fill_io_buffer(td, b, bs, bs);
179 r = write(f->fd, b, bs);
189 if (td->o.fill_device)
191 log_info("fio: ENOSPC on laying out "
195 td_verror(td, errno, "write");
197 td_verror(td, EIO, "write");
204 dprint(FD_FILE, "terminate unlink %s\n", f->file_name);
205 td_io_unlink_file(td, f);
206 } else if (td->o.create_fsync) {
207 if (fsync(f->fd) < 0) {
208 td_verror(td, errno, "fsync");
212 if (td->o.fill_device && !td_write(td)) {
213 fio_file_clear_size_known(f);
214 if (td_io_get_file_size(td, f))
216 if (f->io_size > f->real_file_size)
217 f->io_size = f->real_file_size;
231 static int pre_read_file(struct thread_data *td, struct fio_file *f)
233 int ret = 0, r, did_open = 0, old_runstate;
234 unsigned long long left;
238 if (td_ioengine_flagged(td, FIO_PIPEIO) ||
239 td_ioengine_flagged(td, FIO_NOIO))
242 if (!fio_file_open(f)) {
243 if (td->io_ops->open_file(td, f)) {
244 log_err("fio: cannot pre-read, failed to open file\n");
250 old_runstate = td_bump_runstate(td, TD_PRE_READING);
253 bs = td->o.max_bs[DDIR_READ];
259 td_verror(td, errno, "malloc");
265 if (lseek(f->fd, f->file_offset, SEEK_SET) < 0) {
266 td_verror(td, errno, "lseek");
267 log_err("fio: failed to lseek pre-read file\n");
272 while (left && !td->terminate) {
276 r = read(f->fd, b, bs);
282 td_verror(td, EIO, "pre_read");
288 td_restore_runstate(td, old_runstate);
291 td->io_ops->close_file(td, f);
297 unsigned long long get_rand_file_size(struct thread_data *td)
299 unsigned long long ret, sized;
303 frand_max = rand_max(&td->file_size_state);
304 r = __rand(&td->file_size_state);
305 sized = td->o.file_size_high - td->o.file_size_low;
306 ret = (unsigned long long) ((double) sized * (r / (frand_max + 1.0)));
307 ret += td->o.file_size_low;
308 ret -= (ret % td->o.rw_min_bs);
312 static int file_size(struct thread_data *td, struct fio_file *f)
316 if (stat(f->file_name, &st) == -1) {
317 td_verror(td, errno, "fstat");
321 f->real_file_size = st.st_size;
325 static int bdev_size(struct thread_data *td, struct fio_file *f)
327 unsigned long long bytes = 0;
330 if (td->io_ops->open_file(td, f)) {
331 log_err("fio: failed opening blockdev %s for size check\n",
336 r = blockdev_size(f, &bytes);
338 td_verror(td, r, "blockdev_size");
343 log_err("%s: zero sized block device?\n", f->file_name);
347 f->real_file_size = bytes;
348 td->io_ops->close_file(td, f);
351 td->io_ops->close_file(td, f);
355 static int char_size(struct thread_data *td, struct fio_file *f)
357 #ifdef FIO_HAVE_CHARDEV_SIZE
358 unsigned long long bytes = 0;
361 if (td->io_ops->open_file(td, f)) {
362 log_err("fio: failed opening chardev %s for size check\n",
367 r = chardev_size(f, &bytes);
369 td_verror(td, r, "chardev_size");
374 log_err("%s: zero sized char device?\n", f->file_name);
378 f->real_file_size = bytes;
379 td->io_ops->close_file(td, f);
382 td->io_ops->close_file(td, f);
385 f->real_file_size = -1ULL;
390 static int get_file_size(struct thread_data *td, struct fio_file *f)
394 if (fio_file_size_known(f))
397 if (f->filetype == FIO_TYPE_FILE)
398 ret = file_size(td, f);
399 else if (f->filetype == FIO_TYPE_BLOCK)
400 ret = bdev_size(td, f);
401 else if (f->filetype == FIO_TYPE_CHAR)
402 ret = char_size(td, f);
404 f->real_file_size = -1ULL;
407 * Leave ->real_file_size with 0 since it could be expectation
408 * of initial setup for regular files.
414 * If ->real_file_size is -1, a conditional for the message
415 * "offset extends end" is always true, but it makes no sense,
416 * so just return the same value here.
418 if (f->real_file_size == -1ULL) {
419 log_info("%s: failed to get file size of %s\n", td->o.name,
424 if (td->o.start_offset && f->file_offset == 0)
425 dprint(FD_FILE, "offset of file %s not initialized yet\n",
428 * ->file_offset normally hasn't been initialized yet, so this
429 * is basically always false.
431 if (f->file_offset > f->real_file_size) {
432 log_err("%s: offset extends end (%llu > %llu)\n", td->o.name,
433 (unsigned long long) f->file_offset,
434 (unsigned long long) f->real_file_size);
438 fio_file_set_size_known(f);
442 static int __file_invalidate_cache(struct thread_data *td, struct fio_file *f,
443 unsigned long long off,
444 unsigned long long len)
446 int errval = 0, ret = 0;
455 off = f->file_offset;
457 if (len == -1ULL || off == -1ULL)
460 if (td->io_ops->invalidate) {
461 dprint(FD_IO, "invalidate %s cache %s\n", td->io_ops->name,
463 ret = td->io_ops->invalidate(td, f);
466 } else if (f->filetype == FIO_TYPE_FILE) {
467 dprint(FD_IO, "declare unneeded cache %s: %llu/%llu\n",
468 f->file_name, off, len);
469 ret = posix_fadvise(f->fd, off, len, POSIX_FADV_DONTNEED);
472 } else if (f->filetype == FIO_TYPE_BLOCK) {
475 dprint(FD_IO, "drop page cache %s\n", f->file_name);
476 ret = blockdev_invalidate_cache(f);
477 while (ret < 0 && errno == EAGAIN && retry_count++ < 25) {
479 * Linux multipath devices reject ioctl while
480 * the maps are being updated. That window can
481 * last tens of milliseconds; we'll try up to
482 * a quarter of a second.
485 ret = blockdev_invalidate_cache(f);
487 if (ret < 0 && errno == EACCES && geteuid()) {
489 log_err("fio: only root may flush block "
490 "devices. Cache flush bypassed!\n");
497 else if (ret) /* probably not supported */
499 } else if (f->filetype == FIO_TYPE_CHAR ||
500 f->filetype == FIO_TYPE_PIPE) {
501 dprint(FD_IO, "invalidate not supported %s\n", f->file_name);
506 * Cache flushing isn't a fatal condition, and we know it will
507 * happen on some platforms where we don't have the proper
508 * function to flush eg block device caches. So just warn and
509 * continue on our way.
512 log_info("fio: cache invalidation of %s failed: %s\n",
513 f->file_name, strerror(errval));
519 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
521 if (!fio_file_open(f))
524 return __file_invalidate_cache(td, f, -1ULL, -1ULL);
527 int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
531 dprint(FD_FILE, "fd close %s\n", f->file_name);
535 if (close(f->fd) < 0)
540 if (f->shadow_fd != -1) {
549 int file_lookup_open(struct fio_file *f, int flags)
551 struct fio_file *__f;
554 __f = lookup_file_hash(f->file_name);
556 dprint(FD_FILE, "found file in hash %s\n", f->file_name);
560 dprint(FD_FILE, "file not found in hash %s\n", f->file_name);
568 f->fd = open(f->file_name, flags, 0600);
572 static int file_close_shadow_fds(struct thread_data *td)
578 for_each_file(td, f, i) {
579 if (f->shadow_fd == -1)
590 int generic_open_file(struct thread_data *td, struct fio_file *f)
596 dprint(FD_FILE, "fd open %s\n", f->file_name);
598 if (!strcmp(f->file_name, "-")) {
600 log_err("fio: can't read/write to stdin/out\n");
606 * move output logging to stderr, if we are writing to stdout
615 flags |= OS_O_DIRECT;
618 td_verror(td, EINVAL, "OS does not support atomic IO");
621 flags |= OS_O_DIRECT | FIO_O_ATOMIC;
625 if (td->o.create_on_open && td->o.allow_create)
628 if (f->filetype != FIO_TYPE_FILE)
629 flags |= FIO_O_NOATIME;
636 if (f->filetype == FIO_TYPE_FILE && td->o.allow_create)
640 f->fd = dup(STDOUT_FILENO);
642 from_hash = file_lookup_open(f, flags);
643 } else if (td_read(td)) {
644 if (f->filetype == FIO_TYPE_CHAR && !read_only)
650 f->fd = dup(STDIN_FILENO);
652 from_hash = file_lookup_open(f, flags);
653 } else if (td_trim(td)) {
654 assert(!td_rw(td)); /* should have matched above */
656 from_hash = file_lookup_open(f, flags);
660 char buf[FIO_VERROR_SIZE];
663 if (__e == EPERM && (flags & FIO_O_NOATIME)) {
664 flags &= ~FIO_O_NOATIME;
667 if (__e == EMFILE && file_close_shadow_fds(td))
670 snprintf(buf, sizeof(buf), "open(%s)", f->file_name);
672 if (__e == EINVAL && (flags & OS_O_DIRECT)) {
673 log_err("fio: looks like your file system does not " \
674 "support direct=1/buffered=0\n");
677 td_verror(td, __e, buf);
681 if (!from_hash && f->fd != -1) {
682 if (add_file_hash(f)) {
686 * Stash away descriptor for later close. This is to
687 * work-around a "feature" on Linux, where a close of
688 * an fd that has been opened for write will trigger
689 * udev to call blkid to check partitions, fs id, etc.
690 * That pollutes the device cache, which can slow down
691 * unbuffered accesses.
693 if (f->shadow_fd == -1)
694 f->shadow_fd = f->fd;
697 * OK to ignore, we haven't done anything
700 ret = generic_close_file(td, f);
710 * This function i.e. get_file_size() is the default .get_file_size
711 * implementation of majority of I/O engines.
713 int generic_get_file_size(struct thread_data *td, struct fio_file *f)
715 return get_file_size(td, f);
719 * open/close all files, so that ->real_file_size gets set
721 static int get_file_sizes(struct thread_data *td)
727 for_each_file(td, f, i) {
728 dprint(FD_FILE, "get file size for %p/%d/%s\n", f, i,
731 if (td_io_get_file_size(td, f)) {
732 if (td->error != ENOENT) {
733 log_err("%s\n", td->verror);
741 * There are corner cases where we end up with -1 for
742 * ->real_file_size due to unsupported file type, etc.
743 * We then just set to size option value divided by number
744 * of files, similar to the way file ->io_size is set.
745 * stat(2) failure doesn't set ->real_file_size to -1.
747 if (f->real_file_size == -1ULL && td->o.size)
748 f->real_file_size = td->o.size / td->o.nr_files;
755 struct flist_head list;
762 * Get free number of bytes for each file on each unique mount.
764 static unsigned long long get_fs_free_counts(struct thread_data *td)
766 struct flist_head *n, *tmp;
767 unsigned long long ret = 0;
768 struct fio_mount *fm;
773 for_each_file(td, f, i) {
777 if (f->filetype == FIO_TYPE_BLOCK || f->filetype == FIO_TYPE_CHAR) {
778 if (f->real_file_size != -1ULL)
779 ret += f->real_file_size;
781 } else if (f->filetype != FIO_TYPE_FILE)
785 strncpy(buf, f->file_name, 255);
787 if (stat(buf, &sb) < 0) {
791 if (stat(buf, &sb) < 0)
796 flist_for_each(n, &list) {
797 fm = flist_entry(n, struct fio_mount, list);
798 if (fm->key == sb.st_dev)
807 fm = calloc(1, sizeof(*fm));
808 strncpy(fm->__base, buf, sizeof(fm->__base) - 1);
809 fm->base = basename(fm->__base);
811 flist_add(&fm->list, &list);
814 flist_for_each_safe(n, tmp, &list) {
815 unsigned long long sz;
817 fm = flist_entry(n, struct fio_mount, list);
818 flist_del(&fm->list);
820 sz = get_fs_free_size(fm->base);
821 if (sz && sz != -1ULL)
830 uint64_t get_start_offset(struct thread_data *td, struct fio_file *f)
832 struct thread_options *o = &td->o;
834 if (o->file_append && f->filetype == FIO_TYPE_FILE)
835 return f->real_file_size;
837 return td->o.start_offset +
838 td->subjob_number * td->o.offset_increment;
842 * Open the files and setup files sizes, creating files if necessary.
844 int setup_files(struct thread_data *td)
846 unsigned long long total_size, extend_size;
847 struct thread_options *o = &td->o;
849 unsigned int i, nr_fs_extra = 0;
850 int err = 0, need_extend;
852 const unsigned int bs = td_min_bs(td);
855 dprint(FD_FILE, "setup files\n");
857 old_state = td_bump_runstate(td, TD_SETTING_UP);
859 if (o->read_iolog_file)
863 * Find out physical size of files or devices for this thread,
864 * before we determine I/O size and range of our targets.
865 * If ioengine defines a setup() method, it's responsible for
866 * opening the files and setting f->real_file_size to indicate
867 * the valid range for that file.
869 if (td->io_ops->setup)
870 err = td->io_ops->setup(td);
872 err = get_file_sizes(td);
878 * check sizes. if the files/devices do not exist and the size
879 * isn't passed to fio, abort.
882 for_each_file(td, f, i) {
884 if (f->real_file_size == -1ULL)
887 total_size += f->real_file_size;
891 td->fill_device_size = get_fs_free_counts(td);
894 * device/file sizes are zero and no size given, punt
896 if ((!total_size || total_size == -1ULL) && !o->size &&
897 !td_ioengine_flagged(td, FIO_NOIO) && !o->fill_device &&
898 !(o->nr_files && (o->file_size_low || o->file_size_high))) {
899 log_err("%s: you need to specify size=\n", o->name);
900 td_verror(td, EINVAL, "total_file_size");
905 * Calculate per-file size and potential extra size for the
906 * first files, if needed (i.e. if we don't have a fixed size).
908 if (!o->file_size_low && o->nr_files) {
911 fs = o->size / o->nr_files;
912 all_fs = fs * o->nr_files;
914 if (all_fs < o->size)
915 nr_fs_extra = (o->size - all_fs) / bs;
919 * now file sizes are known, so we can set ->io_size. if size= is
920 * not given, ->io_size is just equal to ->real_file_size. if size
921 * is given, ->io_size is size / nr_files.
923 extend_size = total_size = 0;
925 for_each_file(td, f, i) {
926 f->file_offset = get_start_offset(td, f);
929 * Update ->io_size depending on options specified.
930 * ->file_size_low being 0 means filesize option isn't set.
931 * Non zero ->file_size_low equals ->file_size_high means
932 * filesize option is set in a fixed size format.
933 * Non zero ->file_size_low not equals ->file_size_high means
934 * filesize option is set in a range format.
936 if (!o->file_size_low) {
938 * no file size or range given, file size is equal to
939 * total size divided by number of files. If the size
940 * doesn't divide nicely with the min blocksize,
941 * make the first files bigger.
950 * We normally don't come here for regular files, but
951 * if the result is 0 for a regular file, set it to the
952 * real file size. This could be size of the existing
953 * one if it already exists, but otherwise will be set
954 * to 0. A new file won't be created because
955 * ->io_size + ->file_offset equals ->real_file_size.
958 if (f->file_offset > f->real_file_size)
960 f->io_size = f->real_file_size - f->file_offset;
962 log_info("fio: file %s may be ignored\n",
965 } else if (f->real_file_size < o->file_size_low ||
966 f->real_file_size > o->file_size_high) {
967 if (f->file_offset > o->file_size_low)
970 * file size given. if it's fixed, use that. if it's a
971 * range, generate a random size in-between.
973 if (o->file_size_low == o->file_size_high)
974 f->io_size = o->file_size_low - f->file_offset;
976 f->io_size = get_rand_file_size(td)
980 f->io_size = f->real_file_size - f->file_offset;
982 if (f->io_size == -1ULL)
985 if (o->size_percent) {
986 f->io_size = (f->io_size * o->size_percent) / 100;
987 f->io_size -= (f->io_size % td_min_bs(td));
989 total_size += f->io_size;
992 if (f->filetype == FIO_TYPE_FILE &&
993 (f->io_size + f->file_offset) > f->real_file_size &&
994 !td_ioengine_flagged(td, FIO_DISKLESSIO)) {
995 if (!o->create_on_open) {
997 extend_size += (f->io_size + f->file_offset);
998 fio_file_set_extend(f);
1000 f->real_file_size = f->io_size + f->file_offset;
1004 if (td->o.block_error_hist) {
1007 assert(td->o.nr_files == 1); /* checked in fixup_options */
1009 len = f->io_size / td->o.bs[DDIR_TRIM];
1010 if (len > MAX_NR_BLOCK_INFOS || len <= 0) {
1011 log_err("fio: cannot calculate block histogram with "
1012 "%d trim blocks, maximum %d\n",
1013 len, MAX_NR_BLOCK_INFOS);
1014 td_verror(td, EINVAL, "block_error_hist");
1018 td->ts.nr_block_infos = len;
1019 for (i = 0; i < len; i++)
1020 td->ts.block_infos[i] =
1021 BLOCK_INFO(0, BLOCK_STATE_UNINIT);
1023 td->ts.nr_block_infos = 0;
1025 if (!o->size || (total_size && o->size > total_size))
1026 o->size = total_size;
1028 if (o->size < td_min_bs(td)) {
1029 log_err("fio: blocksize too large for data set\n");
1034 * See if we need to extend some files, typically needed when our
1035 * target regular files don't exist yet, but our jobs require them
1036 * initially due to read I/Os.
1040 if (output_format & FIO_OUTPUT_NORMAL) {
1041 log_info("%s: Laying out IO file%s (%u file%s / %s%lluMiB)\n",
1043 need_extend > 1 ? "s" : "",
1045 need_extend > 1 ? "s" : "",
1046 need_extend > 1 ? "total " : "",
1050 for_each_file(td, f, i) {
1051 unsigned long long old_len = -1ULL, extend_len = -1ULL;
1053 if (!fio_file_extend(f))
1056 assert(f->filetype == FIO_TYPE_FILE);
1057 fio_file_clear_extend(f);
1058 if (!o->fill_device) {
1059 old_len = f->real_file_size;
1060 extend_len = f->io_size + f->file_offset -
1063 f->real_file_size = (f->io_size + f->file_offset);
1064 err = extend_file(td, f);
1068 err = __file_invalidate_cache(td, f, old_len,
1072 * Shut up static checker
1088 o->zone_size = o->size;
1091 * iolog already set the total io size, if we read back
1094 if (!o->read_iolog_file) {
1096 td->total_io_size = o->io_size * o->loops;
1098 td->total_io_size = o->size * o->loops;
1105 td_restore_runstate(td, old_state);
1108 log_err("%s: you need to specify valid offset=\n", o->name);
1110 td_restore_runstate(td, old_state);
1114 int pre_read_files(struct thread_data *td)
1119 dprint(FD_FILE, "pre_read files\n");
1121 for_each_file(td, f, i) {
1122 pre_read_file(td, f);
1128 static int __init_rand_distribution(struct thread_data *td, struct fio_file *f)
1130 unsigned int range_size, seed;
1131 unsigned long nranges;
1134 range_size = min(td->o.min_bs[DDIR_READ], td->o.min_bs[DDIR_WRITE]);
1135 fsize = min(f->real_file_size, f->io_size);
1137 nranges = (fsize + range_size - 1) / range_size;
1139 seed = jhash(f->file_name, strlen(f->file_name), 0) * td->thread_number;
1140 if (!td->o.rand_repeatable)
1141 seed = td->rand_seeds[4];
1143 if (td->o.random_distribution == FIO_RAND_DIST_ZIPF)
1144 zipf_init(&f->zipf, nranges, td->o.zipf_theta.u.f, seed);
1145 else if (td->o.random_distribution == FIO_RAND_DIST_PARETO)
1146 pareto_init(&f->zipf, nranges, td->o.pareto_h.u.f, seed);
1147 else if (td->o.random_distribution == FIO_RAND_DIST_GAUSS)
1148 gauss_init(&f->gauss, nranges, td->o.gauss_dev.u.f, seed);
1153 static int init_rand_distribution(struct thread_data *td)
1159 if (td->o.random_distribution == FIO_RAND_DIST_RANDOM)
1162 state = td_bump_runstate(td, TD_SETTING_UP);
1164 for_each_file(td, f, i)
1165 __init_rand_distribution(td, f);
1167 td_restore_runstate(td, state);
1173 * Check if the number of blocks exceeds the randomness capability of
1174 * the selected generator. Tausworthe is 32-bit, the others are fullly
1177 static int check_rand_gen_limits(struct thread_data *td, struct fio_file *f,
1180 if (blocks <= FRAND32_MAX)
1182 if (td->o.random_generator != FIO_RAND_GEN_TAUSWORTHE)
1186 * If the user hasn't specified a random generator, switch
1187 * to tausworthe64 with informational warning. If the user did
1188 * specify one, just warn.
1190 log_info("fio: file %s exceeds 32-bit tausworthe random generator.\n",
1193 if (!fio_option_is_set(&td->o, random_generator)) {
1194 log_info("fio: Switching to tausworthe64. Use the "
1195 "random_generator= option to get rid of this "
1197 td->o.random_generator = FIO_RAND_GEN_TAUSWORTHE64;
1202 * Just make this information to avoid breaking scripts.
1204 log_info("fio: Use the random_generator= option to switch to lfsr or "
1209 int init_random_map(struct thread_data *td)
1211 unsigned long long blocks;
1215 if (init_rand_distribution(td))
1220 for_each_file(td, f, i) {
1221 uint64_t fsize = min(f->real_file_size, f->io_size);
1223 blocks = fsize / (unsigned long long) td->o.rw_min_bs;
1225 if (check_rand_gen_limits(td, f, blocks))
1228 if (td->o.random_generator == FIO_RAND_GEN_LFSR) {
1231 seed = td->rand_seeds[FIO_RAND_BLOCK_OFF];
1233 if (!lfsr_init(&f->lfsr, blocks, seed, 0)) {
1234 fio_file_set_lfsr(f);
1237 } else if (!td->o.norandommap) {
1238 f->io_axmap = axmap_new(blocks);
1240 fio_file_set_axmap(f);
1243 } else if (td->o.norandommap)
1246 if (!td->o.softrandommap) {
1247 log_err("fio: failed allocating random map. If running"
1248 " a large number of jobs, try the 'norandommap'"
1249 " option or set 'softrandommap'. Or give"
1250 " a larger --alloc-size to fio.\n");
1254 log_info("fio: file %s failed allocating random map. Running "
1255 "job without.\n", f->file_name);
1261 void close_files(struct thread_data *td)
1266 for_each_file(td, f, i) {
1267 if (fio_file_open(f))
1268 td_io_close_file(td, f);
1272 void close_and_free_files(struct thread_data *td)
1277 dprint(FD_FILE, "close files\n");
1279 for_each_file(td, f, i) {
1280 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
1281 dprint(FD_FILE, "free unlink %s\n", f->file_name);
1282 td_io_unlink_file(td, f);
1285 if (fio_file_open(f))
1286 td_io_close_file(td, f);
1288 remove_file_hash(f);
1290 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
1291 dprint(FD_FILE, "free unlink %s\n", f->file_name);
1292 td_io_unlink_file(td, f);
1295 sfree(f->file_name);
1296 f->file_name = NULL;
1297 if (fio_file_axmap(f)) {
1298 axmap_free(f->io_axmap);
1304 td->o.filename = NULL;
1306 free(td->file_locks);
1307 td->files_index = 0;
1309 td->file_locks = NULL;
1310 td->o.file_lock_mode = FILE_LOCK_NONE;
1314 static void get_file_type(struct fio_file *f)
1318 if (!strcmp(f->file_name, "-"))
1319 f->filetype = FIO_TYPE_PIPE;
1321 f->filetype = FIO_TYPE_FILE;
1324 /* \\.\ is the device namespace in Windows, where every file is
1326 if (strncmp(f->file_name, "\\\\.\\", 4) == 0)
1327 f->filetype = FIO_TYPE_BLOCK;
1330 if (!stat(f->file_name, &sb)) {
1331 if (S_ISBLK(sb.st_mode))
1332 f->filetype = FIO_TYPE_BLOCK;
1333 else if (S_ISCHR(sb.st_mode))
1334 f->filetype = FIO_TYPE_CHAR;
1335 else if (S_ISFIFO(sb.st_mode))
1336 f->filetype = FIO_TYPE_PIPE;
1340 static bool __is_already_allocated(const char *fname, bool set)
1342 struct flist_head *entry;
1345 ret = file_bloom_exists(fname, set);
1349 flist_for_each(entry, &filename_list) {
1350 struct file_name *fn;
1352 fn = flist_entry(entry, struct file_name, list);
1354 if (!strcmp(fn->filename, fname))
1361 static bool is_already_allocated(const char *fname)
1365 fio_file_hash_lock();
1366 ret = __is_already_allocated(fname, false);
1367 fio_file_hash_unlock();
1372 static void set_already_allocated(const char *fname)
1374 struct file_name *fn;
1376 fn = malloc(sizeof(struct file_name));
1377 fn->filename = strdup(fname);
1379 fio_file_hash_lock();
1380 if (!__is_already_allocated(fname, true)) {
1381 flist_add_tail(&fn->list, &filename_list);
1384 fio_file_hash_unlock();
1392 static void free_already_allocated(void)
1394 struct flist_head *entry, *tmp;
1395 struct file_name *fn;
1397 if (flist_empty(&filename_list))
1400 fio_file_hash_lock();
1401 flist_for_each_safe(entry, tmp, &filename_list) {
1402 fn = flist_entry(entry, struct file_name, list);
1404 flist_del(&fn->list);
1408 fio_file_hash_unlock();
1411 static struct fio_file *alloc_new_file(struct thread_data *td)
1415 f = smalloc(sizeof(*f));
1423 fio_file_reset(td, f);
1427 bool exists_and_not_regfile(const char *filename)
1431 if (lstat(filename, &sb) == -1)
1434 #ifndef WIN32 /* NOT Windows */
1435 if (S_ISREG(sb.st_mode))
1438 /* \\.\ is the device namespace in Windows, where every file
1439 * is a device node */
1440 if (S_ISREG(sb.st_mode) && strncmp(filename, "\\\\.\\", 4) != 0)
1447 int add_file(struct thread_data *td, const char *fname, int numjob, int inc)
1449 int cur_files = td->files_index;
1450 char file_name[PATH_MAX];
1454 dprint(FD_FILE, "add file %s\n", fname);
1456 if (td->o.directory)
1457 len = set_name_idx(file_name, PATH_MAX, td->o.directory, numjob,
1458 td->o.unique_filename);
1460 sprintf(file_name + len, "%s", fname);
1462 /* clean cloned siblings using existing files */
1463 if (numjob && is_already_allocated(file_name) &&
1464 !exists_and_not_regfile(fname))
1467 f = alloc_new_file(td);
1469 if (td->files_size <= td->files_index) {
1470 unsigned int new_size = td->o.nr_files + 1;
1472 dprint(FD_FILE, "resize file array to %d files\n", new_size);
1474 td->files = realloc(td->files, new_size * sizeof(f));
1475 if (td->files == NULL) {
1476 log_err("fio: realloc OOM\n");
1479 if (td->o.file_lock_mode != FILE_LOCK_NONE) {
1480 td->file_locks = realloc(td->file_locks, new_size);
1481 if (!td->file_locks) {
1482 log_err("fio: realloc OOM\n");
1485 td->file_locks[cur_files] = FILE_LOCK_NONE;
1487 td->files_size = new_size;
1489 td->files[cur_files] = f;
1490 f->fileno = cur_files;
1493 * init function, io engine may not be loaded yet
1495 if (td->io_ops && td_ioengine_flagged(td, FIO_DISKLESSIO))
1496 f->real_file_size = -1ULL;
1498 f->file_name = smalloc_strdup(file_name);
1504 switch (td->o.file_lock_mode) {
1505 case FILE_LOCK_NONE:
1507 case FILE_LOCK_READWRITE:
1508 f->rwlock = fio_rwlock_init();
1510 case FILE_LOCK_EXCLUSIVE:
1511 f->lock = fio_mutex_init(FIO_MUTEX_UNLOCKED);
1514 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
1519 if (f->filetype == FIO_TYPE_FILE)
1520 td->nr_normal_files++;
1522 set_already_allocated(file_name);
1527 dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name,
1533 int add_file_exclusive(struct thread_data *td, const char *fname)
1538 for_each_file(td, f, i) {
1539 if (!strcmp(f->file_name, fname))
1543 return add_file(td, fname, 0, 1);
1546 void get_file(struct fio_file *f)
1548 dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
1549 assert(fio_file_open(f));
1553 int put_file(struct thread_data *td, struct fio_file *f)
1555 int f_ret = 0, ret = 0;
1557 dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
1559 if (!fio_file_open(f)) {
1560 assert(f->fd == -1);
1564 assert(f->references);
1565 if (--f->references)
1568 if (should_fsync(td) && td->o.fsync_on_close) {
1569 f_ret = fsync(f->fd);
1574 if (td->io_ops->close_file)
1575 ret = td->io_ops->close_file(td, f);
1580 td->nr_open_files--;
1581 fio_file_clear_open(f);
1582 assert(f->fd == -1);
1586 void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
1588 if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1591 if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
1592 if (ddir == DDIR_READ)
1593 fio_rwlock_read(f->rwlock);
1595 fio_rwlock_write(f->rwlock);
1596 } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1597 fio_mutex_down(f->lock);
1599 td->file_locks[f->fileno] = td->o.file_lock_mode;
1602 void unlock_file(struct thread_data *td, struct fio_file *f)
1604 if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1607 if (td->o.file_lock_mode == FILE_LOCK_READWRITE)
1608 fio_rwlock_unlock(f->rwlock);
1609 else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1610 fio_mutex_up(f->lock);
1612 td->file_locks[f->fileno] = FILE_LOCK_NONE;
1615 void unlock_file_all(struct thread_data *td, struct fio_file *f)
1617 if (td->o.file_lock_mode == FILE_LOCK_NONE || !td->file_locks)
1619 if (td->file_locks[f->fileno] != FILE_LOCK_NONE)
1623 static int recurse_dir(struct thread_data *td, const char *dirname)
1629 D = opendir(dirname);
1631 char buf[FIO_VERROR_SIZE];
1633 snprintf(buf, FIO_VERROR_SIZE, "opendir(%s)", dirname);
1634 td_verror(td, errno, buf);
1638 while ((dir = readdir(D)) != NULL) {
1639 char full_path[PATH_MAX];
1642 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
1645 sprintf(full_path, "%s%s%s", dirname, FIO_OS_PATH_SEPARATOR, dir->d_name);
1647 if (lstat(full_path, &sb) == -1) {
1648 if (errno != ENOENT) {
1649 td_verror(td, errno, "stat");
1655 if (S_ISREG(sb.st_mode)) {
1656 add_file(td, full_path, 0, 1);
1659 if (!S_ISDIR(sb.st_mode))
1662 ret = recurse_dir(td, full_path);
1671 int add_dir_files(struct thread_data *td, const char *path)
1673 int ret = recurse_dir(td, path);
1676 log_info("fio: opendir added %d files\n", td->o.nr_files);
1681 void dup_files(struct thread_data *td, struct thread_data *org)
1686 dprint(FD_FILE, "dup files: %d\n", org->files_index);
1691 td->files = malloc(org->files_index * sizeof(f));
1693 if (td->o.file_lock_mode != FILE_LOCK_NONE)
1694 td->file_locks = malloc(org->files_index);
1696 for_each_file(org, f, i) {
1697 struct fio_file *__f;
1699 __f = alloc_new_file(td);
1702 __f->file_name = smalloc_strdup(f->file_name);
1703 if (!__f->file_name)
1706 __f->filetype = f->filetype;
1709 if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1710 __f->lock = f->lock;
1711 else if (td->o.file_lock_mode == FILE_LOCK_READWRITE)
1712 __f->rwlock = f->rwlock;
1719 * Returns the index that matches the filename, or -1 if not there
1721 int get_fileno(struct thread_data *td, const char *fname)
1726 for_each_file(td, f, i)
1727 if (!strcmp(f->file_name, fname))
1734 * For log usage, where we add/open/close files automatically
1736 void free_release_files(struct thread_data *td)
1740 td->o.open_files = 0;
1741 td->files_index = 0;
1742 td->nr_normal_files = 0;
1745 void fio_file_reset(struct thread_data *td, struct fio_file *f)
1749 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1750 f->last_pos[i] = f->file_offset;
1751 f->last_start[i] = -1ULL;
1754 if (fio_file_axmap(f))
1755 axmap_reset(f->io_axmap);
1756 else if (fio_file_lfsr(f))
1757 lfsr_reset(&f->lfsr, td->rand_seeds[FIO_RAND_BLOCK_OFF]);
1760 bool fio_files_done(struct thread_data *td)
1765 for_each_file(td, f, i)
1766 if (!fio_file_done(f))
1772 /* free memory used in initialization phase only */
1773 void filesetup_mem_free(void)
1775 free_already_allocated();