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Add filename_format option
[fio.git] / filesetup.c
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1#include <unistd.h>
2#include <fcntl.h>
3#include <string.h>
4#include <assert.h>
5#include <dirent.h>
6#include <libgen.h>
7#include <sys/stat.h>
8#include <sys/mman.h>
9#include <sys/types.h>
10
11#include "fio.h"
12#include "smalloc.h"
13#include "filehash.h"
14#include "os/os.h"
15#include "hash.h"
16#include "lib/axmap.h"
17
18#ifdef CONFIG_LINUX_FALLOCATE
19#include <linux/falloc.h>
20#endif
21
22static int root_warn;
23
24static inline void clear_error(struct thread_data *td)
25{
26 td->error = 0;
27 td->verror[0] = '\0';
28}
29
30/*
31 * Leaves f->fd open on success, caller must close
32 */
33static int extend_file(struct thread_data *td, struct fio_file *f)
34{
35 int r, new_layout = 0, unlink_file = 0, flags;
36 unsigned long long left;
37 unsigned int bs;
38 char *b;
39
40 if (read_only) {
41 log_err("fio: refusing extend of file due to read-only\n");
42 return 0;
43 }
44
45 /*
46 * check if we need to lay the file out complete again. fio
47 * does that for operations involving reads, or for writes
48 * where overwrite is set
49 */
50 if (td_read(td) || (td_write(td) && td->o.overwrite) ||
51 (td_write(td) && td->io_ops->flags & FIO_NOEXTEND))
52 new_layout = 1;
53 if (td_write(td) && !td->o.overwrite)
54 unlink_file = 1;
55
56 if (unlink_file || new_layout) {
57 dprint(FD_FILE, "layout unlink %s\n", f->file_name);
58 if ((unlink(f->file_name) < 0) && (errno != ENOENT)) {
59 td_verror(td, errno, "unlink");
60 return 1;
61 }
62 }
63
64 flags = O_WRONLY | O_CREAT;
65 if (new_layout)
66 flags |= O_TRUNC;
67
68 dprint(FD_FILE, "open file %s, flags %x\n", f->file_name, flags);
69 f->fd = open(f->file_name, flags, 0644);
70 if (f->fd < 0) {
71 td_verror(td, errno, "open");
72 return 1;
73 }
74
75#ifdef CONFIG_POSIX_FALLOCATE
76 if (!td->o.fill_device) {
77 switch (td->o.fallocate_mode) {
78 case FIO_FALLOCATE_NONE:
79 break;
80 case FIO_FALLOCATE_POSIX:
81 dprint(FD_FILE, "posix_fallocate file %s size %llu\n",
82 f->file_name,
83 (unsigned long long) f->real_file_size);
84
85 r = posix_fallocate(f->fd, 0, f->real_file_size);
86 if (r > 0) {
87 log_err("fio: posix_fallocate fails: %s\n",
88 strerror(r));
89 }
90 break;
91#ifdef CONFIG_LINUX_FALLOCATE
92 case FIO_FALLOCATE_KEEP_SIZE:
93 dprint(FD_FILE,
94 "fallocate(FALLOC_FL_KEEP_SIZE) "
95 "file %s size %llu\n", f->file_name,
96 (unsigned long long) f->real_file_size);
97
98 r = fallocate(f->fd, FALLOC_FL_KEEP_SIZE, 0,
99 f->real_file_size);
100 if (r != 0) {
101 td_verror(td, errno, "fallocate");
102 }
103 break;
104#endif /* CONFIG_LINUX_FALLOCATE */
105 default:
106 log_err("fio: unknown fallocate mode: %d\n",
107 td->o.fallocate_mode);
108 assert(0);
109 }
110 }
111#endif /* CONFIG_POSIX_FALLOCATE */
112
113 if (!new_layout)
114 goto done;
115
116 /*
117 * The size will be -1ULL when fill_device is used, so don't truncate
118 * or fallocate this file, just write it
119 */
120 if (!td->o.fill_device) {
121 dprint(FD_FILE, "truncate file %s, size %llu\n", f->file_name,
122 (unsigned long long) f->real_file_size);
123 if (ftruncate(f->fd, f->real_file_size) == -1) {
124 td_verror(td, errno, "ftruncate");
125 goto err;
126 }
127 }
128
129 b = malloc(td->o.max_bs[DDIR_WRITE]);
130 memset(b, 0, td->o.max_bs[DDIR_WRITE]);
131
132 left = f->real_file_size;
133 while (left && !td->terminate) {
134 bs = td->o.max_bs[DDIR_WRITE];
135 if (bs > left)
136 bs = left;
137
138 r = write(f->fd, b, bs);
139
140 if (r > 0) {
141 left -= r;
142 continue;
143 } else {
144 if (r < 0) {
145 int __e = errno;
146
147 if (__e == ENOSPC) {
148 if (td->o.fill_device)
149 break;
150 log_info("fio: ENOSPC on laying out "
151 "file, stopping\n");
152 break;
153 }
154 td_verror(td, errno, "write");
155 } else
156 td_verror(td, EIO, "write");
157
158 break;
159 }
160 }
161
162 if (td->terminate) {
163 dprint(FD_FILE, "terminate unlink %s\n", f->file_name);
164 unlink(f->file_name);
165 } else if (td->o.create_fsync) {
166 if (fsync(f->fd) < 0) {
167 td_verror(td, errno, "fsync");
168 goto err;
169 }
170 }
171 if (td->o.fill_device && !td_write(td)) {
172 fio_file_clear_size_known(f);
173 if (td_io_get_file_size(td, f))
174 goto err;
175 if (f->io_size > f->real_file_size)
176 f->io_size = f->real_file_size;
177 }
178
179 free(b);
180done:
181 return 0;
182err:
183 close(f->fd);
184 f->fd = -1;
185 return 1;
186}
187
188static int pre_read_file(struct thread_data *td, struct fio_file *f)
189{
190 int r, did_open = 0, old_runstate;
191 unsigned long long left;
192 unsigned int bs;
193 char *b;
194
195 if (td->io_ops->flags & FIO_PIPEIO)
196 return 0;
197
198 if (!fio_file_open(f)) {
199 if (td->io_ops->open_file(td, f)) {
200 log_err("fio: cannot pre-read, failed to open file\n");
201 return 1;
202 }
203 did_open = 1;
204 }
205
206 old_runstate = td->runstate;
207 td_set_runstate(td, TD_PRE_READING);
208
209 bs = td->o.max_bs[DDIR_READ];
210 b = malloc(bs);
211 memset(b, 0, bs);
212
213 lseek(f->fd, f->file_offset, SEEK_SET);
214 left = f->io_size;
215
216 while (left && !td->terminate) {
217 if (bs > left)
218 bs = left;
219
220 r = read(f->fd, b, bs);
221
222 if (r == (int) bs) {
223 left -= bs;
224 continue;
225 } else {
226 td_verror(td, EIO, "pre_read");
227 break;
228 }
229 }
230
231 td_set_runstate(td, old_runstate);
232
233 if (did_open)
234 td->io_ops->close_file(td, f);
235 free(b);
236 return 0;
237}
238
239static unsigned long long get_rand_file_size(struct thread_data *td)
240{
241 unsigned long long ret, sized;
242 unsigned long r;
243
244 if (td->o.use_os_rand) {
245 r = os_random_long(&td->file_size_state);
246 sized = td->o.file_size_high - td->o.file_size_low;
247 ret = (unsigned long long) ((double) sized * (r / (OS_RAND_MAX + 1.0)));
248 } else {
249 r = __rand(&td->__file_size_state);
250 sized = td->o.file_size_high - td->o.file_size_low;
251 ret = (unsigned long long) ((double) sized * (r / (FRAND_MAX + 1.0)));
252 }
253
254 ret += td->o.file_size_low;
255 ret -= (ret % td->o.rw_min_bs);
256 return ret;
257}
258
259static int file_size(struct thread_data *td, struct fio_file *f)
260{
261 struct stat st;
262
263 if (stat(f->file_name, &st) == -1) {
264 td_verror(td, errno, "fstat");
265 return 1;
266 }
267
268 f->real_file_size = st.st_size;
269 return 0;
270}
271
272static int bdev_size(struct thread_data *td, struct fio_file *f)
273{
274 unsigned long long bytes = 0;
275 int r;
276
277 if (td->io_ops->open_file(td, f)) {
278 log_err("fio: failed opening blockdev %s for size check\n",
279 f->file_name);
280 return 1;
281 }
282
283 r = blockdev_size(f, &bytes);
284 if (r) {
285 td_verror(td, r, "blockdev_size");
286 goto err;
287 }
288
289 if (!bytes) {
290 log_err("%s: zero sized block device?\n", f->file_name);
291 goto err;
292 }
293
294 f->real_file_size = bytes;
295 td->io_ops->close_file(td, f);
296 return 0;
297err:
298 td->io_ops->close_file(td, f);
299 return 1;
300}
301
302static int char_size(struct thread_data *td, struct fio_file *f)
303{
304#ifdef FIO_HAVE_CHARDEV_SIZE
305 unsigned long long bytes = 0;
306 int r;
307
308 if (td->io_ops->open_file(td, f)) {
309 log_err("fio: failed opening blockdev %s for size check\n",
310 f->file_name);
311 return 1;
312 }
313
314 r = chardev_size(f, &bytes);
315 if (r) {
316 td_verror(td, r, "chardev_size");
317 goto err;
318 }
319
320 if (!bytes) {
321 log_err("%s: zero sized char device?\n", f->file_name);
322 goto err;
323 }
324
325 f->real_file_size = bytes;
326 td->io_ops->close_file(td, f);
327 return 0;
328err:
329 td->io_ops->close_file(td, f);
330 return 1;
331#else
332 f->real_file_size = -1ULL;
333 return 0;
334#endif
335}
336
337static int get_file_size(struct thread_data *td, struct fio_file *f)
338{
339 int ret = 0;
340
341 if (fio_file_size_known(f))
342 return 0;
343
344 if (f->filetype == FIO_TYPE_FILE)
345 ret = file_size(td, f);
346 else if (f->filetype == FIO_TYPE_BD)
347 ret = bdev_size(td, f);
348 else if (f->filetype == FIO_TYPE_CHAR)
349 ret = char_size(td, f);
350 else
351 f->real_file_size = -1;
352
353 if (ret)
354 return ret;
355
356 if (f->file_offset > f->real_file_size) {
357 log_err("%s: offset extends end (%llu > %llu)\n", td->o.name,
358 f->file_offset, f->real_file_size);
359 return 1;
360 }
361
362 fio_file_set_size_known(f);
363 return 0;
364}
365
366static int __file_invalidate_cache(struct thread_data *td, struct fio_file *f,
367 unsigned long long off,
368 unsigned long long len)
369{
370 int ret = 0;
371
372 if (len == -1ULL)
373 len = f->io_size;
374 if (off == -1ULL)
375 off = f->file_offset;
376
377 if (len == -1ULL || off == -1ULL)
378 return 0;
379
380 dprint(FD_IO, "invalidate cache %s: %llu/%llu\n", f->file_name, off,
381 len);
382
383 /*
384 * FIXME: add blockdev flushing too
385 */
386 if (f->mmap_ptr) {
387 ret = posix_madvise(f->mmap_ptr, f->mmap_sz, POSIX_MADV_DONTNEED);
388#ifdef FIO_MADV_FREE
389 (void) posix_madvise(f->mmap_ptr, f->mmap_sz, FIO_MADV_FREE);
390#endif
391 } else if (f->filetype == FIO_TYPE_FILE) {
392 ret = posix_fadvise(f->fd, off, len, POSIX_FADV_DONTNEED);
393 } else if (f->filetype == FIO_TYPE_BD) {
394 ret = blockdev_invalidate_cache(f);
395 if (ret < 0 && errno == EACCES && geteuid()) {
396 if (!root_warn) {
397 log_err("fio: only root may flush block "
398 "devices. Cache flush bypassed!\n");
399 root_warn = 1;
400 }
401 ret = 0;
402 }
403 } else if (f->filetype == FIO_TYPE_CHAR || f->filetype == FIO_TYPE_PIPE)
404 ret = 0;
405
406 if (ret < 0) {
407 td_verror(td, errno, "invalidate_cache");
408 return 1;
409 } else if (ret > 0) {
410 td_verror(td, ret, "invalidate_cache");
411 return 1;
412 }
413
414 return ret;
415
416}
417
418int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
419{
420 if (!fio_file_open(f))
421 return 0;
422
423 return __file_invalidate_cache(td, f, -1ULL, -1ULL);
424}
425
426int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
427{
428 int ret = 0;
429
430 dprint(FD_FILE, "fd close %s\n", f->file_name);
431
432 remove_file_hash(f);
433
434 if (close(f->fd) < 0)
435 ret = errno;
436
437 f->fd = -1;
438
439 if (f->shadow_fd != -1) {
440 close(f->shadow_fd);
441 f->shadow_fd = -1;
442 }
443
444 return ret;
445}
446
447int file_lookup_open(struct fio_file *f, int flags)
448{
449 struct fio_file *__f;
450 int from_hash;
451
452 __f = lookup_file_hash(f->file_name);
453 if (__f) {
454 dprint(FD_FILE, "found file in hash %s\n", f->file_name);
455 /*
456 * racy, need the __f->lock locked
457 */
458 f->lock = __f->lock;
459 from_hash = 1;
460 } else {
461 dprint(FD_FILE, "file not found in hash %s\n", f->file_name);
462 from_hash = 0;
463 }
464
465 f->fd = open(f->file_name, flags, 0600);
466 return from_hash;
467}
468
469static int file_close_shadow_fds(struct thread_data *td)
470{
471 struct fio_file *f;
472 int num_closed = 0;
473 unsigned int i;
474
475 for_each_file(td, f, i) {
476 if (f->shadow_fd == -1)
477 continue;
478
479 close(f->shadow_fd);
480 f->shadow_fd = -1;
481 num_closed++;
482 }
483
484 return num_closed;
485}
486
487int generic_open_file(struct thread_data *td, struct fio_file *f)
488{
489 int is_std = 0;
490 int flags = 0;
491 int from_hash = 0;
492
493 dprint(FD_FILE, "fd open %s\n", f->file_name);
494
495 if (td_trim(td) && f->filetype != FIO_TYPE_BD) {
496 log_err("fio: trim only applies to block device\n");
497 return 1;
498 }
499
500 if (!strcmp(f->file_name, "-")) {
501 if (td_rw(td)) {
502 log_err("fio: can't read/write to stdin/out\n");
503 return 1;
504 }
505 is_std = 1;
506
507 /*
508 * move output logging to stderr, if we are writing to stdout
509 */
510 if (td_write(td))
511 f_out = stderr;
512 }
513
514 if (td_trim(td))
515 goto skip_flags;
516 if (td->o.odirect)
517 flags |= OS_O_DIRECT;
518 if (td->o.sync_io)
519 flags |= O_SYNC;
520 if (td->o.create_on_open)
521 flags |= O_CREAT;
522skip_flags:
523 if (f->filetype != FIO_TYPE_FILE)
524 flags |= FIO_O_NOATIME;
525
526open_again:
527 if (td_write(td)) {
528 if (!read_only)
529 flags |= O_RDWR;
530
531 if (f->filetype == FIO_TYPE_FILE)
532 flags |= O_CREAT;
533
534 if (is_std)
535 f->fd = dup(STDOUT_FILENO);
536 else
537 from_hash = file_lookup_open(f, flags);
538 } else if (td_read(td)) {
539 if (f->filetype == FIO_TYPE_CHAR && !read_only)
540 flags |= O_RDWR;
541 else
542 flags |= O_RDONLY;
543
544 if (is_std)
545 f->fd = dup(STDIN_FILENO);
546 else
547 from_hash = file_lookup_open(f, flags);
548 } else { //td trim
549 flags |= O_RDWR;
550 from_hash = file_lookup_open(f, flags);
551 }
552
553 if (f->fd == -1) {
554 char buf[FIO_VERROR_SIZE];
555 int __e = errno;
556
557 if (__e == EPERM && (flags & FIO_O_NOATIME)) {
558 flags &= ~FIO_O_NOATIME;
559 goto open_again;
560 }
561 if (__e == EMFILE && file_close_shadow_fds(td))
562 goto open_again;
563
564 snprintf(buf, sizeof(buf), "open(%s)", f->file_name);
565
566 if (__e == EINVAL && (flags & OS_O_DIRECT)) {
567 log_err("fio: looks like your file system does not " \
568 "support direct=1/buffered=0\n");
569 }
570
571 td_verror(td, __e, buf);
572 }
573
574 if (!from_hash && f->fd != -1) {
575 if (add_file_hash(f)) {
576 int fio_unused ret;
577
578 /*
579 * Stash away descriptor for later close. This is to
580 * work-around a "feature" on Linux, where a close of
581 * an fd that has been opened for write will trigger
582 * udev to call blkid to check partitions, fs id, etc.
583 * That polutes the device cache, which can slow down
584 * unbuffered accesses.
585 */
586 if (f->shadow_fd == -1)
587 f->shadow_fd = f->fd;
588 else {
589 /*
590 * OK to ignore, we haven't done anything
591 * with it
592 */
593 ret = generic_close_file(td, f);
594 }
595 goto open_again;
596 }
597 }
598
599 return 0;
600}
601
602int generic_get_file_size(struct thread_data *td, struct fio_file *f)
603{
604 return get_file_size(td, f);
605}
606
607/*
608 * open/close all files, so that ->real_file_size gets set
609 */
610static int get_file_sizes(struct thread_data *td)
611{
612 struct fio_file *f;
613 unsigned int i;
614 int err = 0;
615
616 for_each_file(td, f, i) {
617 dprint(FD_FILE, "get file size for %p/%d/%p\n", f, i,
618 f->file_name);
619
620 if (td_io_get_file_size(td, f)) {
621 if (td->error != ENOENT) {
622 log_err("%s\n", td->verror);
623 err = 1;
624 }
625 clear_error(td);
626 }
627
628 if (f->real_file_size == -1ULL && td->o.size)
629 f->real_file_size = td->o.size / td->o.nr_files;
630 }
631
632 return err;
633}
634
635struct fio_mount {
636 struct flist_head list;
637 const char *base;
638 char __base[256];
639 unsigned int key;
640};
641
642/*
643 * Get free number of bytes for each file on each unique mount.
644 */
645static unsigned long long get_fs_free_counts(struct thread_data *td)
646{
647 struct flist_head *n, *tmp;
648 unsigned long long ret = 0;
649 struct fio_mount *fm;
650 FLIST_HEAD(list);
651 struct fio_file *f;
652 unsigned int i;
653
654 for_each_file(td, f, i) {
655 struct stat sb;
656 char buf[256];
657
658 if (f->filetype == FIO_TYPE_BD || f->filetype == FIO_TYPE_CHAR) {
659 if (f->real_file_size != -1ULL)
660 ret += f->real_file_size;
661 continue;
662 } else if (f->filetype != FIO_TYPE_FILE)
663 continue;
664
665 strcpy(buf, f->file_name);
666
667 if (stat(buf, &sb) < 0) {
668 if (errno != ENOENT)
669 break;
670 strcpy(buf, ".");
671 if (stat(buf, &sb) < 0)
672 break;
673 }
674
675 fm = NULL;
676 flist_for_each(n, &list) {
677 fm = flist_entry(n, struct fio_mount, list);
678 if (fm->key == sb.st_dev)
679 break;
680
681 fm = NULL;
682 }
683
684 if (fm)
685 continue;
686
687 fm = malloc(sizeof(*fm));
688 strcpy(fm->__base, buf);
689 fm->base = basename(fm->__base);
690 fm->key = sb.st_dev;
691 flist_add(&fm->list, &list);
692 }
693
694 flist_for_each_safe(n, tmp, &list) {
695 unsigned long long sz;
696
697 fm = flist_entry(n, struct fio_mount, list);
698 flist_del(&fm->list);
699
700 sz = get_fs_size(fm->base);
701 if (sz && sz != -1ULL)
702 ret += sz;
703
704 free(fm);
705 }
706
707 return ret;
708}
709
710uint64_t get_start_offset(struct thread_data *td)
711{
712 return td->o.start_offset +
713 (td->thread_number - 1) * td->o.offset_increment;
714}
715
716/*
717 * Open the files and setup files sizes, creating files if necessary.
718 */
719int setup_files(struct thread_data *td)
720{
721 unsigned long long total_size, extend_size;
722 struct thread_options *o = &td->o;
723 struct fio_file *f;
724 unsigned int i;
725 int err = 0, need_extend;
726
727 dprint(FD_FILE, "setup files\n");
728
729 if (o->read_iolog_file)
730 goto done;
731
732 /*
733 * if ioengine defines a setup() method, it's responsible for
734 * opening the files and setting f->real_file_size to indicate
735 * the valid range for that file.
736 */
737 if (td->io_ops->setup)
738 err = td->io_ops->setup(td);
739 else
740 err = get_file_sizes(td);
741
742 if (err)
743 return err;
744
745 /*
746 * check sizes. if the files/devices do not exist and the size
747 * isn't passed to fio, abort.
748 */
749 total_size = 0;
750 for_each_file(td, f, i) {
751 if (f->real_file_size == -1ULL)
752 total_size = -1ULL;
753 else
754 total_size += f->real_file_size;
755 }
756
757 if (o->fill_device)
758 td->fill_device_size = get_fs_free_counts(td);
759
760 /*
761 * device/file sizes are zero and no size given, punt
762 */
763 if ((!total_size || total_size == -1ULL) && !o->size &&
764 !(td->io_ops->flags & FIO_NOIO) && !o->fill_device &&
765 !(o->nr_files && (o->file_size_low || o->file_size_high))) {
766 log_err("%s: you need to specify size=\n", o->name);
767 td_verror(td, EINVAL, "total_file_size");
768 return 1;
769 }
770
771 /*
772 * now file sizes are known, so we can set ->io_size. if size= is
773 * not given, ->io_size is just equal to ->real_file_size. if size
774 * is given, ->io_size is size / nr_files.
775 */
776 extend_size = total_size = 0;
777 need_extend = 0;
778 for_each_file(td, f, i) {
779 f->file_offset = get_start_offset(td);
780
781 if (!o->file_size_low) {
782 /*
783 * no file size range given, file size is equal to
784 * total size divided by number of files. if that is
785 * zero, set it to the real file size.
786 */
787 f->io_size = o->size / o->nr_files;
788 if (!f->io_size)
789 f->io_size = f->real_file_size - f->file_offset;
790 } else if (f->real_file_size < o->file_size_low ||
791 f->real_file_size > o->file_size_high) {
792 if (f->file_offset > o->file_size_low)
793 goto err_offset;
794 /*
795 * file size given. if it's fixed, use that. if it's a
796 * range, generate a random size in-between.
797 */
798 if (o->file_size_low == o->file_size_high)
799 f->io_size = o->file_size_low - f->file_offset;
800 else {
801 f->io_size = get_rand_file_size(td)
802 - f->file_offset;
803 }
804 } else
805 f->io_size = f->real_file_size - f->file_offset;
806
807 if (f->io_size == -1ULL)
808 total_size = -1ULL;
809 else {
810 if (o->size_percent)
811 f->io_size = (f->io_size * o->size_percent) / 100;
812 total_size += f->io_size;
813 }
814
815 if (f->filetype == FIO_TYPE_FILE &&
816 (f->io_size + f->file_offset) > f->real_file_size &&
817 !(td->io_ops->flags & FIO_DISKLESSIO)) {
818 if (!o->create_on_open) {
819 need_extend++;
820 extend_size += (f->io_size + f->file_offset);
821 } else
822 f->real_file_size = f->io_size + f->file_offset;
823 fio_file_set_extend(f);
824 }
825 }
826
827 if (!o->size || o->size > total_size)
828 o->size = total_size;
829
830 /*
831 * See if we need to extend some files
832 */
833 if (need_extend) {
834 temp_stall_ts = 1;
835 if (output_format == FIO_OUTPUT_NORMAL)
836 log_info("%s: Laying out IO file(s) (%u file(s) /"
837 " %lluMB)\n", o->name, need_extend,
838 extend_size >> 20);
839
840 for_each_file(td, f, i) {
841 unsigned long long old_len = -1ULL, extend_len = -1ULL;
842
843 if (!fio_file_extend(f))
844 continue;
845
846 assert(f->filetype == FIO_TYPE_FILE);
847 fio_file_clear_extend(f);
848 if (!o->fill_device) {
849 old_len = f->real_file_size;
850 extend_len = f->io_size + f->file_offset -
851 old_len;
852 }
853 f->real_file_size = (f->io_size + f->file_offset);
854 err = extend_file(td, f);
855 if (err)
856 break;
857
858 err = __file_invalidate_cache(td, f, old_len,
859 extend_len);
860 close(f->fd);
861 f->fd = -1;
862 if (err)
863 break;
864 }
865 temp_stall_ts = 0;
866 }
867
868 if (err)
869 return err;
870
871 if (!o->zone_size)
872 o->zone_size = o->size;
873
874 /*
875 * iolog already set the total io size, if we read back
876 * stored entries.
877 */
878 if (!o->read_iolog_file)
879 td->total_io_size = o->size * o->loops;
880
881done:
882 if (o->create_only)
883 td->done = 1;
884
885 return 0;
886err_offset:
887 log_err("%s: you need to specify valid offset=\n", o->name);
888 return 1;
889}
890
891int pre_read_files(struct thread_data *td)
892{
893 struct fio_file *f;
894 unsigned int i;
895
896 dprint(FD_FILE, "pre_read files\n");
897
898 for_each_file(td, f, i) {
899 pre_read_file(td, f);
900 }
901
902 return 1;
903}
904
905static int __init_rand_distribution(struct thread_data *td, struct fio_file *f)
906{
907 unsigned int range_size, seed;
908 unsigned long nranges;
909 uint64_t file_size;
910
911 range_size = min(td->o.min_bs[DDIR_READ], td->o.min_bs[DDIR_WRITE]);
912 file_size = min(f->real_file_size, f->io_size);
913
914 nranges = (file_size + range_size - 1) / range_size;
915
916 seed = jhash(f->file_name, strlen(f->file_name), 0) * td->thread_number;
917 if (!td->o.rand_repeatable)
918 seed = td->rand_seeds[4];
919
920 if (td->o.random_distribution == FIO_RAND_DIST_ZIPF)
921 zipf_init(&f->zipf, nranges, td->o.zipf_theta, seed);
922 else
923 pareto_init(&f->zipf, nranges, td->o.pareto_h, seed);
924
925 return 1;
926}
927
928static int init_rand_distribution(struct thread_data *td)
929{
930 struct fio_file *f;
931 unsigned int i;
932 int state;
933
934 if (td->o.random_distribution == FIO_RAND_DIST_RANDOM)
935 return 0;
936
937 state = td->runstate;
938 td_set_runstate(td, TD_SETTING_UP);
939 for_each_file(td, f, i)
940 __init_rand_distribution(td, f);
941 td_set_runstate(td, state);
942
943 return 1;
944}
945
946int init_random_map(struct thread_data *td)
947{
948 unsigned long long blocks;
949 struct fio_file *f;
950 unsigned int i;
951
952 if (init_rand_distribution(td))
953 return 0;
954 if (!td_random(td))
955 return 0;
956
957 for_each_file(td, f, i) {
958 uint64_t file_size = min(f->real_file_size, f->io_size);
959
960 blocks = file_size / (unsigned long long) td->o.rw_min_bs;
961
962 if (td->o.random_generator == FIO_RAND_GEN_LFSR) {
963 unsigned long seed;
964
965 seed = td->rand_seeds[FIO_RAND_BLOCK_OFF];
966
967 if (!lfsr_init(&f->lfsr, blocks, seed, seed & 0xF))
968 continue;
969 } else if (!td->o.norandommap) {
970 f->io_axmap = axmap_new(blocks);
971 if (f->io_axmap)
972 continue;
973 } else if (td->o.norandommap)
974 continue;
975
976 if (!td->o.softrandommap) {
977 log_err("fio: failed allocating random map. If running"
978 " a large number of jobs, try the 'norandommap'"
979 " option or set 'softrandommap'. Or give"
980 " a larger --alloc-size to fio.\n");
981 return 1;
982 }
983
984 log_info("fio: file %s failed allocating random map. Running "
985 "job without.\n", f->file_name);
986 }
987
988 return 0;
989}
990
991void close_files(struct thread_data *td)
992{
993 struct fio_file *f;
994 unsigned int i;
995
996 for_each_file(td, f, i) {
997 if (fio_file_open(f))
998 td_io_close_file(td, f);
999 }
1000}
1001
1002void close_and_free_files(struct thread_data *td)
1003{
1004 struct fio_file *f;
1005 unsigned int i;
1006
1007 dprint(FD_FILE, "close files\n");
1008
1009 for_each_file(td, f, i) {
1010 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
1011 dprint(FD_FILE, "free unlink %s\n", f->file_name);
1012 unlink(f->file_name);
1013 }
1014
1015 if (fio_file_open(f))
1016 td_io_close_file(td, f);
1017
1018 remove_file_hash(f);
1019
1020 sfree(f->file_name);
1021 f->file_name = NULL;
1022 axmap_free(f->io_axmap);
1023 f->io_axmap = NULL;
1024 sfree(f);
1025 }
1026
1027 td->o.filename = NULL;
1028 free(td->files);
1029 free(td->file_locks);
1030 td->files_index = 0;
1031 td->files = NULL;
1032 td->file_locks = NULL;
1033 td->o.nr_files = 0;
1034}
1035
1036static void get_file_type(struct fio_file *f)
1037{
1038 struct stat sb;
1039
1040 if (!strcmp(f->file_name, "-"))
1041 f->filetype = FIO_TYPE_PIPE;
1042 else
1043 f->filetype = FIO_TYPE_FILE;
1044
1045 /* \\.\ is the device namespace in Windows, where every file is
1046 * a block device */
1047 if (strncmp(f->file_name, "\\\\.\\", 4) == 0)
1048 f->filetype = FIO_TYPE_BD;
1049
1050 if (!stat(f->file_name, &sb)) {
1051 if (S_ISBLK(sb.st_mode))
1052 f->filetype = FIO_TYPE_BD;
1053 else if (S_ISCHR(sb.st_mode))
1054 f->filetype = FIO_TYPE_CHAR;
1055 else if (S_ISFIFO(sb.st_mode))
1056 f->filetype = FIO_TYPE_PIPE;
1057 }
1058}
1059
1060int add_file(struct thread_data *td, const char *fname)
1061{
1062 int cur_files = td->files_index;
1063 char file_name[PATH_MAX];
1064 struct fio_file *f;
1065 int len = 0;
1066
1067 dprint(FD_FILE, "add file %s\n", fname);
1068
1069 f = smalloc(sizeof(*f));
1070 if (!f) {
1071 log_err("fio: smalloc OOM\n");
1072 assert(0);
1073 }
1074
1075 f->fd = -1;
1076 f->shadow_fd = -1;
1077 fio_file_reset(td, f);
1078
1079 if (td->files_size <= td->files_index) {
1080 unsigned int new_size = td->o.nr_files + 1;
1081
1082 dprint(FD_FILE, "resize file array to %d files\n", new_size);
1083
1084 td->files = realloc(td->files, new_size * sizeof(f));
1085 if (td->files == NULL) {
1086 log_err("fio: realloc OOM\n");
1087 assert(0);
1088 }
1089 if (td->o.file_lock_mode != FILE_LOCK_NONE) {
1090 td->file_locks = realloc(td->file_locks, new_size);
1091 if (!td->file_locks) {
1092 log_err("fio: realloc OOM\n");
1093 assert(0);
1094 }
1095 td->file_locks[cur_files] = FILE_LOCK_NONE;
1096 }
1097 td->files_size = new_size;
1098 }
1099 td->files[cur_files] = f;
1100 f->fileno = cur_files;
1101
1102 /*
1103 * init function, io engine may not be loaded yet
1104 */
1105 if (td->io_ops && (td->io_ops->flags & FIO_DISKLESSIO))
1106 f->real_file_size = -1ULL;
1107
1108 if (td->o.directory)
1109 len = sprintf(file_name, "%s/", td->o.directory);
1110
1111 sprintf(file_name + len, "%s", fname);
1112 f->file_name = smalloc_strdup(file_name);
1113 if (!f->file_name) {
1114 log_err("fio: smalloc OOM\n");
1115 assert(0);
1116 }
1117
1118 get_file_type(f);
1119
1120 switch (td->o.file_lock_mode) {
1121 case FILE_LOCK_NONE:
1122 break;
1123 case FILE_LOCK_READWRITE:
1124 f->rwlock = fio_rwlock_init();
1125 break;
1126 case FILE_LOCK_EXCLUSIVE:
1127 f->lock = fio_mutex_init(FIO_MUTEX_UNLOCKED);
1128 break;
1129 default:
1130 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
1131 assert(0);
1132 }
1133
1134 td->files_index++;
1135 if (f->filetype == FIO_TYPE_FILE)
1136 td->nr_normal_files++;
1137
1138 dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name,
1139 cur_files);
1140
1141 return cur_files;
1142}
1143
1144int add_file_exclusive(struct thread_data *td, const char *fname)
1145{
1146 struct fio_file *f;
1147 unsigned int i;
1148
1149 for_each_file(td, f, i) {
1150 if (!strcmp(f->file_name, fname))
1151 return i;
1152 }
1153
1154 return add_file(td, fname);
1155}
1156
1157void get_file(struct fio_file *f)
1158{
1159 dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
1160 assert(fio_file_open(f));
1161 f->references++;
1162}
1163
1164int put_file(struct thread_data *td, struct fio_file *f)
1165{
1166 int f_ret = 0, ret = 0;
1167
1168 dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
1169
1170 if (!fio_file_open(f)) {
1171 assert(f->fd == -1);
1172 return 0;
1173 }
1174
1175 assert(f->references);
1176 if (--f->references)
1177 return 0;
1178
1179 if (should_fsync(td) && td->o.fsync_on_close)
1180 f_ret = fsync(f->fd);
1181
1182 if (td->io_ops->close_file)
1183 ret = td->io_ops->close_file(td, f);
1184
1185 if (!ret)
1186 ret = f_ret;
1187
1188 td->nr_open_files--;
1189 fio_file_clear_open(f);
1190 assert(f->fd == -1);
1191 return ret;
1192}
1193
1194void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
1195{
1196 if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1197 return;
1198
1199 if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
1200 if (ddir == DDIR_READ)
1201 fio_rwlock_read(f->rwlock);
1202 else
1203 fio_rwlock_write(f->rwlock);
1204 } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1205 fio_mutex_down(f->lock);
1206
1207 td->file_locks[f->fileno] = td->o.file_lock_mode;
1208}
1209
1210void unlock_file(struct thread_data *td, struct fio_file *f)
1211{
1212 if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1213 return;
1214
1215 if (td->o.file_lock_mode == FILE_LOCK_READWRITE)
1216 fio_rwlock_unlock(f->rwlock);
1217 else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1218 fio_mutex_up(f->lock);
1219
1220 td->file_locks[f->fileno] = FILE_LOCK_NONE;
1221}
1222
1223void unlock_file_all(struct thread_data *td, struct fio_file *f)
1224{
1225 if (td->file_locks[f->fileno] != FILE_LOCK_NONE)
1226 unlock_file(td, f);
1227}
1228
1229static int recurse_dir(struct thread_data *td, const char *dirname)
1230{
1231 struct dirent *dir;
1232 int ret = 0;
1233 DIR *D;
1234
1235 D = opendir(dirname);
1236 if (!D) {
1237 char buf[FIO_VERROR_SIZE];
1238
1239 snprintf(buf, FIO_VERROR_SIZE, "opendir(%s)", dirname);
1240 td_verror(td, errno, buf);
1241 return 1;
1242 }
1243
1244 while ((dir = readdir(D)) != NULL) {
1245 char full_path[PATH_MAX];
1246 struct stat sb;
1247
1248 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
1249 continue;
1250
1251 sprintf(full_path, "%s%s%s", dirname, FIO_OS_PATH_SEPARATOR, dir->d_name);
1252
1253 if (lstat(full_path, &sb) == -1) {
1254 if (errno != ENOENT) {
1255 td_verror(td, errno, "stat");
1256 return 1;
1257 }
1258 }
1259
1260 if (S_ISREG(sb.st_mode)) {
1261 add_file(td, full_path);
1262 td->o.nr_files++;
1263 continue;
1264 }
1265 if (!S_ISDIR(sb.st_mode))
1266 continue;
1267
1268 ret = recurse_dir(td, full_path);
1269 if (ret)
1270 break;
1271 }
1272
1273 closedir(D);
1274 return ret;
1275}
1276
1277int add_dir_files(struct thread_data *td, const char *path)
1278{
1279 int ret = recurse_dir(td, path);
1280
1281 if (!ret)
1282 log_info("fio: opendir added %d files\n", td->o.nr_files);
1283
1284 return ret;
1285}
1286
1287void dup_files(struct thread_data *td, struct thread_data *org)
1288{
1289 struct fio_file *f;
1290 unsigned int i;
1291
1292 dprint(FD_FILE, "dup files: %d\n", org->files_index);
1293
1294 if (!org->files)
1295 return;
1296
1297 td->files = malloc(org->files_index * sizeof(f));
1298
1299 if (td->o.file_lock_mode != FILE_LOCK_NONE)
1300 td->file_locks = malloc(org->files_index);
1301
1302 for_each_file(org, f, i) {
1303 struct fio_file *__f;
1304
1305 __f = smalloc(sizeof(*__f));
1306 if (!__f) {
1307 log_err("fio: smalloc OOM\n");
1308 assert(0);
1309 }
1310 __f->fd = -1;
1311 fio_file_reset(td, __f);
1312
1313 if (f->file_name) {
1314 __f->file_name = smalloc_strdup(f->file_name);
1315 if (!__f->file_name) {
1316 log_err("fio: smalloc OOM\n");
1317 assert(0);
1318 }
1319
1320 __f->filetype = f->filetype;
1321 }
1322
1323 td->files[i] = __f;
1324 }
1325}
1326
1327/*
1328 * Returns the index that matches the filename, or -1 if not there
1329 */
1330int get_fileno(struct thread_data *td, const char *fname)
1331{
1332 struct fio_file *f;
1333 unsigned int i;
1334
1335 for_each_file(td, f, i)
1336 if (!strcmp(f->file_name, fname))
1337 return i;
1338
1339 return -1;
1340}
1341
1342/*
1343 * For log usage, where we add/open/close files automatically
1344 */
1345void free_release_files(struct thread_data *td)
1346{
1347 close_files(td);
1348 td->files_index = 0;
1349 td->nr_normal_files = 0;
1350}
1351
1352void fio_file_reset(struct thread_data *td, struct fio_file *f)
1353{
1354 f->last_pos = f->file_offset;
1355 f->last_start = -1ULL;
1356 if (f->io_axmap)
1357 axmap_reset(f->io_axmap);
1358 if (td->o.random_generator == FIO_RAND_GEN_LFSR)
1359 lfsr_reset(&f->lfsr, td->rand_seeds[FIO_RAND_BLOCK_OFF]);
1360}
fio - Flexible IO Tester