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fio: provide an option for a startdelay range
[fio.git] / filesetup.c
... / ...
CommitLineData
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 if (errno != EFBIG) {
125 td_verror(td, errno, "ftruncate");
126 goto err;
127 }
128 }
129 }
130
131 b = malloc(td->o.max_bs[DDIR_WRITE]);
132
133 left = f->real_file_size;
134 while (left && !td->terminate) {
135 bs = td->o.max_bs[DDIR_WRITE];
136 if (bs > left)
137 bs = left;
138
139 fill_io_buffer(td, b, bs, bs);
140
141 r = write(f->fd, b, bs);
142
143 if (r > 0) {
144 left -= r;
145 continue;
146 } else {
147 if (r < 0) {
148 int __e = errno;
149
150 if (__e == ENOSPC) {
151 if (td->o.fill_device)
152 break;
153 log_info("fio: ENOSPC on laying out "
154 "file, stopping\n");
155 break;
156 }
157 td_verror(td, errno, "write");
158 } else
159 td_verror(td, EIO, "write");
160
161 break;
162 }
163 }
164
165 if (td->terminate) {
166 dprint(FD_FILE, "terminate unlink %s\n", f->file_name);
167 unlink(f->file_name);
168 } else if (td->o.create_fsync) {
169 if (fsync(f->fd) < 0) {
170 td_verror(td, errno, "fsync");
171 goto err;
172 }
173 }
174 if (td->o.fill_device && !td_write(td)) {
175 fio_file_clear_size_known(f);
176 if (td_io_get_file_size(td, f))
177 goto err;
178 if (f->io_size > f->real_file_size)
179 f->io_size = f->real_file_size;
180 }
181
182 free(b);
183done:
184 return 0;
185err:
186 close(f->fd);
187 f->fd = -1;
188 return 1;
189}
190
191static int pre_read_file(struct thread_data *td, struct fio_file *f)
192{
193 int r, did_open = 0, old_runstate;
194 unsigned long long left;
195 unsigned int bs;
196 char *b;
197
198 if (td->io_ops->flags & FIO_PIPEIO)
199 return 0;
200
201 if (!fio_file_open(f)) {
202 if (td->io_ops->open_file(td, f)) {
203 log_err("fio: cannot pre-read, failed to open file\n");
204 return 1;
205 }
206 did_open = 1;
207 }
208
209 old_runstate = td->runstate;
210 td_set_runstate(td, TD_PRE_READING);
211
212 bs = td->o.max_bs[DDIR_READ];
213 b = malloc(bs);
214 memset(b, 0, bs);
215
216 lseek(f->fd, f->file_offset, SEEK_SET);
217 left = f->io_size;
218
219 while (left && !td->terminate) {
220 if (bs > left)
221 bs = left;
222
223 r = read(f->fd, b, bs);
224
225 if (r == (int) bs) {
226 left -= bs;
227 continue;
228 } else {
229 td_verror(td, EIO, "pre_read");
230 break;
231 }
232 }
233
234 td_set_runstate(td, old_runstate);
235
236 if (did_open)
237 td->io_ops->close_file(td, f);
238 free(b);
239 return 0;
240}
241
242static unsigned long long get_rand_file_size(struct thread_data *td)
243{
244 unsigned long long ret, sized;
245 unsigned long r;
246
247 if (td->o.use_os_rand) {
248 r = os_random_long(&td->file_size_state);
249 sized = td->o.file_size_high - td->o.file_size_low;
250 ret = (unsigned long long) ((double) sized * (r / (OS_RAND_MAX + 1.0)));
251 } else {
252 r = __rand(&td->__file_size_state);
253 sized = td->o.file_size_high - td->o.file_size_low;
254 ret = (unsigned long long) ((double) sized * (r / (FRAND_MAX + 1.0)));
255 }
256
257 ret += td->o.file_size_low;
258 ret -= (ret % td->o.rw_min_bs);
259 return ret;
260}
261
262static int file_size(struct thread_data *td, struct fio_file *f)
263{
264 struct stat st;
265
266 if (stat(f->file_name, &st) == -1) {
267 td_verror(td, errno, "fstat");
268 return 1;
269 }
270
271 f->real_file_size = st.st_size;
272 return 0;
273}
274
275static int bdev_size(struct thread_data *td, struct fio_file *f)
276{
277 unsigned long long bytes = 0;
278 int r;
279
280 if (td->io_ops->open_file(td, f)) {
281 log_err("fio: failed opening blockdev %s for size check\n",
282 f->file_name);
283 return 1;
284 }
285
286 r = blockdev_size(f, &bytes);
287 if (r) {
288 td_verror(td, r, "blockdev_size");
289 goto err;
290 }
291
292 if (!bytes) {
293 log_err("%s: zero sized block device?\n", f->file_name);
294 goto err;
295 }
296
297 f->real_file_size = bytes;
298 td->io_ops->close_file(td, f);
299 return 0;
300err:
301 td->io_ops->close_file(td, f);
302 return 1;
303}
304
305static int char_size(struct thread_data *td, struct fio_file *f)
306{
307#ifdef FIO_HAVE_CHARDEV_SIZE
308 unsigned long long bytes = 0;
309 int r;
310
311 if (td->io_ops->open_file(td, f)) {
312 log_err("fio: failed opening blockdev %s for size check\n",
313 f->file_name);
314 return 1;
315 }
316
317 r = chardev_size(f, &bytes);
318 if (r) {
319 td_verror(td, r, "chardev_size");
320 goto err;
321 }
322
323 if (!bytes) {
324 log_err("%s: zero sized char device?\n", f->file_name);
325 goto err;
326 }
327
328 f->real_file_size = bytes;
329 td->io_ops->close_file(td, f);
330 return 0;
331err:
332 td->io_ops->close_file(td, f);
333 return 1;
334#else
335 f->real_file_size = -1ULL;
336 return 0;
337#endif
338}
339
340static int get_file_size(struct thread_data *td, struct fio_file *f)
341{
342 int ret = 0;
343
344 if (fio_file_size_known(f))
345 return 0;
346
347 if (f->filetype == FIO_TYPE_FILE)
348 ret = file_size(td, f);
349 else if (f->filetype == FIO_TYPE_BD)
350 ret = bdev_size(td, f);
351 else if (f->filetype == FIO_TYPE_CHAR)
352 ret = char_size(td, f);
353 else
354 f->real_file_size = -1;
355
356 if (ret)
357 return ret;
358
359 if (f->file_offset > f->real_file_size) {
360 log_err("%s: offset extends end (%llu > %llu)\n", td->o.name,
361 (unsigned long long) f->file_offset,
362 (unsigned long long) f->real_file_size);
363 return 1;
364 }
365
366 fio_file_set_size_known(f);
367 return 0;
368}
369
370static int __file_invalidate_cache(struct thread_data *td, struct fio_file *f,
371 unsigned long long off,
372 unsigned long long len)
373{
374 int ret = 0;
375
376 if (len == -1ULL)
377 len = f->io_size;
378 if (off == -1ULL)
379 off = f->file_offset;
380
381 if (len == -1ULL || off == -1ULL)
382 return 0;
383
384 dprint(FD_IO, "invalidate cache %s: %llu/%llu\n", f->file_name, off,
385 len);
386
387 /*
388 * FIXME: add blockdev flushing too
389 */
390 if (f->mmap_ptr) {
391 ret = posix_madvise(f->mmap_ptr, f->mmap_sz, POSIX_MADV_DONTNEED);
392#ifdef FIO_MADV_FREE
393 if (f->filetype == FIO_TYPE_BD)
394 (void) posix_madvise(f->mmap_ptr, f->mmap_sz, FIO_MADV_FREE);
395#endif
396 } else if (f->filetype == FIO_TYPE_FILE) {
397 ret = posix_fadvise(f->fd, off, len, POSIX_FADV_DONTNEED);
398 } else if (f->filetype == FIO_TYPE_BD) {
399 ret = blockdev_invalidate_cache(f);
400 if (ret < 0 && errno == EACCES && geteuid()) {
401 if (!root_warn) {
402 log_err("fio: only root may flush block "
403 "devices. Cache flush bypassed!\n");
404 root_warn = 1;
405 }
406 ret = 0;
407 }
408 } else if (f->filetype == FIO_TYPE_CHAR || f->filetype == FIO_TYPE_PIPE)
409 ret = 0;
410
411 if (ret < 0) {
412 td_verror(td, errno, "invalidate_cache");
413 return 1;
414 } else if (ret > 0) {
415 td_verror(td, ret, "invalidate_cache");
416 return 1;
417 }
418
419 return ret;
420
421}
422
423int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
424{
425 if (!fio_file_open(f))
426 return 0;
427
428 return __file_invalidate_cache(td, f, -1ULL, -1ULL);
429}
430
431int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
432{
433 int ret = 0;
434
435 dprint(FD_FILE, "fd close %s\n", f->file_name);
436
437 remove_file_hash(f);
438
439 if (close(f->fd) < 0)
440 ret = errno;
441
442 f->fd = -1;
443
444 if (f->shadow_fd != -1) {
445 close(f->shadow_fd);
446 f->shadow_fd = -1;
447 }
448
449 f->engine_data = 0;
450 return ret;
451}
452
453int file_lookup_open(struct fio_file *f, int flags)
454{
455 struct fio_file *__f;
456 int from_hash;
457
458 __f = lookup_file_hash(f->file_name);
459 if (__f) {
460 dprint(FD_FILE, "found file in hash %s\n", f->file_name);
461 /*
462 * racy, need the __f->lock locked
463 */
464 f->lock = __f->lock;
465 from_hash = 1;
466 } else {
467 dprint(FD_FILE, "file not found in hash %s\n", f->file_name);
468 from_hash = 0;
469 }
470
471 f->fd = open(f->file_name, flags, 0600);
472 return from_hash;
473}
474
475static int file_close_shadow_fds(struct thread_data *td)
476{
477 struct fio_file *f;
478 int num_closed = 0;
479 unsigned int i;
480
481 for_each_file(td, f, i) {
482 if (f->shadow_fd == -1)
483 continue;
484
485 close(f->shadow_fd);
486 f->shadow_fd = -1;
487 num_closed++;
488 }
489
490 return num_closed;
491}
492
493int generic_open_file(struct thread_data *td, struct fio_file *f)
494{
495 int is_std = 0;
496 int flags = 0;
497 int from_hash = 0;
498
499 dprint(FD_FILE, "fd open %s\n", f->file_name);
500
501 if (td_trim(td) && f->filetype != FIO_TYPE_BD) {
502 log_err("fio: trim only applies to block device\n");
503 return 1;
504 }
505
506 if (!strcmp(f->file_name, "-")) {
507 if (td_rw(td)) {
508 log_err("fio: can't read/write to stdin/out\n");
509 return 1;
510 }
511 is_std = 1;
512
513 /*
514 * move output logging to stderr, if we are writing to stdout
515 */
516 if (td_write(td))
517 f_out = stderr;
518 }
519
520 if (td_trim(td))
521 goto skip_flags;
522 if (td->o.odirect)
523 flags |= OS_O_DIRECT;
524 if (td->o.oatomic) {
525 if (!FIO_O_ATOMIC) {
526 td_verror(td, EINVAL, "OS does not support atomic IO");
527 return 1;
528 }
529 flags |= OS_O_DIRECT | FIO_O_ATOMIC;
530 }
531 if (td->o.sync_io)
532 flags |= O_SYNC;
533 if (td->o.create_on_open)
534 flags |= O_CREAT;
535skip_flags:
536 if (f->filetype != FIO_TYPE_FILE)
537 flags |= FIO_O_NOATIME;
538
539open_again:
540 if (td_write(td)) {
541 if (!read_only)
542 flags |= O_RDWR;
543
544 if (f->filetype == FIO_TYPE_FILE)
545 flags |= O_CREAT;
546
547 if (is_std)
548 f->fd = dup(STDOUT_FILENO);
549 else
550 from_hash = file_lookup_open(f, flags);
551 } else if (td_read(td)) {
552 if (f->filetype == FIO_TYPE_CHAR && !read_only)
553 flags |= O_RDWR;
554 else
555 flags |= O_RDONLY;
556
557 if (is_std)
558 f->fd = dup(STDIN_FILENO);
559 else
560 from_hash = file_lookup_open(f, flags);
561 } else { //td trim
562 flags |= O_RDWR;
563 from_hash = file_lookup_open(f, flags);
564 }
565
566 if (f->fd == -1) {
567 char buf[FIO_VERROR_SIZE];
568 int __e = errno;
569
570 if (__e == EPERM && (flags & FIO_O_NOATIME)) {
571 flags &= ~FIO_O_NOATIME;
572 goto open_again;
573 }
574 if (__e == EMFILE && file_close_shadow_fds(td))
575 goto open_again;
576
577 snprintf(buf, sizeof(buf), "open(%s)", f->file_name);
578
579 if (__e == EINVAL && (flags & OS_O_DIRECT)) {
580 log_err("fio: looks like your file system does not " \
581 "support direct=1/buffered=0\n");
582 }
583
584 td_verror(td, __e, buf);
585 }
586
587 if (!from_hash && f->fd != -1) {
588 if (add_file_hash(f)) {
589 int fio_unused ret;
590
591 /*
592 * Stash away descriptor for later close. This is to
593 * work-around a "feature" on Linux, where a close of
594 * an fd that has been opened for write will trigger
595 * udev to call blkid to check partitions, fs id, etc.
596 * That pollutes the device cache, which can slow down
597 * unbuffered accesses.
598 */
599 if (f->shadow_fd == -1)
600 f->shadow_fd = f->fd;
601 else {
602 /*
603 * OK to ignore, we haven't done anything
604 * with it
605 */
606 ret = generic_close_file(td, f);
607 }
608 goto open_again;
609 }
610 }
611
612 return 0;
613}
614
615int generic_get_file_size(struct thread_data *td, struct fio_file *f)
616{
617 return get_file_size(td, f);
618}
619
620/*
621 * open/close all files, so that ->real_file_size gets set
622 */
623static int get_file_sizes(struct thread_data *td)
624{
625 struct fio_file *f;
626 unsigned int i;
627 int err = 0;
628
629 for_each_file(td, f, i) {
630 dprint(FD_FILE, "get file size for %p/%d/%p\n", f, i,
631 f->file_name);
632
633 if (td_io_get_file_size(td, f)) {
634 if (td->error != ENOENT) {
635 log_err("%s\n", td->verror);
636 err = 1;
637 }
638 clear_error(td);
639 }
640
641 if (f->real_file_size == -1ULL && td->o.size)
642 f->real_file_size = td->o.size / td->o.nr_files;
643 }
644
645 return err;
646}
647
648struct fio_mount {
649 struct flist_head list;
650 const char *base;
651 char __base[256];
652 unsigned int key;
653};
654
655/*
656 * Get free number of bytes for each file on each unique mount.
657 */
658static unsigned long long get_fs_free_counts(struct thread_data *td)
659{
660 struct flist_head *n, *tmp;
661 unsigned long long ret = 0;
662 struct fio_mount *fm;
663 FLIST_HEAD(list);
664 struct fio_file *f;
665 unsigned int i;
666
667 for_each_file(td, f, i) {
668 struct stat sb;
669 char buf[256];
670
671 if (f->filetype == FIO_TYPE_BD || f->filetype == FIO_TYPE_CHAR) {
672 if (f->real_file_size != -1ULL)
673 ret += f->real_file_size;
674 continue;
675 } else if (f->filetype != FIO_TYPE_FILE)
676 continue;
677
678 strcpy(buf, f->file_name);
679
680 if (stat(buf, &sb) < 0) {
681 if (errno != ENOENT)
682 break;
683 strcpy(buf, ".");
684 if (stat(buf, &sb) < 0)
685 break;
686 }
687
688 fm = NULL;
689 flist_for_each(n, &list) {
690 fm = flist_entry(n, struct fio_mount, list);
691 if (fm->key == sb.st_dev)
692 break;
693
694 fm = NULL;
695 }
696
697 if (fm)
698 continue;
699
700 fm = malloc(sizeof(*fm));
701 strcpy(fm->__base, buf);
702 fm->base = basename(fm->__base);
703 fm->key = sb.st_dev;
704 flist_add(&fm->list, &list);
705 }
706
707 flist_for_each_safe(n, tmp, &list) {
708 unsigned long long sz;
709
710 fm = flist_entry(n, struct fio_mount, list);
711 flist_del(&fm->list);
712
713 sz = get_fs_size(fm->base);
714 if (sz && sz != -1ULL)
715 ret += sz;
716
717 free(fm);
718 }
719
720 return ret;
721}
722
723uint64_t get_start_offset(struct thread_data *td)
724{
725 return td->o.start_offset +
726 (td->thread_number - 1) * td->o.offset_increment;
727}
728
729/*
730 * Open the files and setup files sizes, creating files if necessary.
731 */
732int setup_files(struct thread_data *td)
733{
734 unsigned long long total_size, extend_size;
735 struct thread_options *o = &td->o;
736 struct fio_file *f;
737 unsigned int i, nr_fs_extra = 0;
738 int err = 0, need_extend;
739 int old_state;
740 const unsigned int bs = td_min_bs(td);
741 uint64_t fs = 0;
742
743 dprint(FD_FILE, "setup files\n");
744
745 old_state = td->runstate;
746 td_set_runstate(td, TD_SETTING_UP);
747
748 if (o->read_iolog_file)
749 goto done;
750
751 /*
752 * if ioengine defines a setup() method, it's responsible for
753 * opening the files and setting f->real_file_size to indicate
754 * the valid range for that file.
755 */
756 if (td->io_ops->setup)
757 err = td->io_ops->setup(td);
758 else
759 err = get_file_sizes(td);
760
761 if (err)
762 goto err_out;
763
764 /*
765 * check sizes. if the files/devices do not exist and the size
766 * isn't passed to fio, abort.
767 */
768 total_size = 0;
769 for_each_file(td, f, i) {
770 if (f->real_file_size == -1ULL)
771 total_size = -1ULL;
772 else
773 total_size += f->real_file_size;
774 }
775
776 if (o->fill_device)
777 td->fill_device_size = get_fs_free_counts(td);
778
779 /*
780 * device/file sizes are zero and no size given, punt
781 */
782 if ((!total_size || total_size == -1ULL) && !o->size &&
783 !(td->io_ops->flags & FIO_NOIO) && !o->fill_device &&
784 !(o->nr_files && (o->file_size_low || o->file_size_high))) {
785 log_err("%s: you need to specify size=\n", o->name);
786 td_verror(td, EINVAL, "total_file_size");
787 goto err_out;
788 }
789
790 /*
791 * Calculate per-file size and potential extra size for the
792 * first files, if needed.
793 */
794 if (!o->file_size_low) {
795 uint64_t all_fs;
796
797 fs = o->size / o->nr_files;
798 all_fs = fs * o->nr_files;
799
800 if (all_fs < o->size)
801 nr_fs_extra = (o->size - all_fs) / bs;
802 }
803
804 /*
805 * now file sizes are known, so we can set ->io_size. if size= is
806 * not given, ->io_size is just equal to ->real_file_size. if size
807 * is given, ->io_size is size / nr_files.
808 */
809 extend_size = total_size = 0;
810 need_extend = 0;
811 for_each_file(td, f, i) {
812 f->file_offset = get_start_offset(td);
813
814 if (!o->file_size_low) {
815 /*
816 * no file size range given, file size is equal to
817 * total size divided by number of files. If that is
818 * zero, set it to the real file size. If the size
819 * doesn't divide nicely with the min blocksize,
820 * make the first files bigger.
821 */
822 f->io_size = fs;
823 if (nr_fs_extra) {
824 nr_fs_extra--;
825 f->io_size += bs;
826 }
827
828 if (!f->io_size)
829 f->io_size = f->real_file_size - f->file_offset;
830 } else if (f->real_file_size < o->file_size_low ||
831 f->real_file_size > o->file_size_high) {
832 if (f->file_offset > o->file_size_low)
833 goto err_offset;
834 /*
835 * file size given. if it's fixed, use that. if it's a
836 * range, generate a random size in-between.
837 */
838 if (o->file_size_low == o->file_size_high)
839 f->io_size = o->file_size_low - f->file_offset;
840 else {
841 f->io_size = get_rand_file_size(td)
842 - f->file_offset;
843 }
844 } else
845 f->io_size = f->real_file_size - f->file_offset;
846
847 if (f->io_size == -1ULL)
848 total_size = -1ULL;
849 else {
850 if (o->size_percent)
851 f->io_size = (f->io_size * o->size_percent) / 100;
852 total_size += f->io_size;
853 }
854
855 if (f->filetype == FIO_TYPE_FILE &&
856 (f->io_size + f->file_offset) > f->real_file_size &&
857 !(td->io_ops->flags & FIO_DISKLESSIO)) {
858 if (!o->create_on_open) {
859 need_extend++;
860 extend_size += (f->io_size + f->file_offset);
861 } else
862 f->real_file_size = f->io_size + f->file_offset;
863 fio_file_set_extend(f);
864 }
865 }
866
867 if (!o->size || o->size > total_size)
868 o->size = total_size;
869
870 /*
871 * See if we need to extend some files
872 */
873 if (need_extend) {
874 temp_stall_ts = 1;
875 if (output_format == FIO_OUTPUT_NORMAL)
876 log_info("%s: Laying out IO file(s) (%u file(s) /"
877 " %lluMB)\n", o->name, need_extend,
878 extend_size >> 20);
879
880 for_each_file(td, f, i) {
881 unsigned long long old_len = -1ULL, extend_len = -1ULL;
882
883 if (!fio_file_extend(f))
884 continue;
885
886 assert(f->filetype == FIO_TYPE_FILE);
887 fio_file_clear_extend(f);
888 if (!o->fill_device) {
889 old_len = f->real_file_size;
890 extend_len = f->io_size + f->file_offset -
891 old_len;
892 }
893 f->real_file_size = (f->io_size + f->file_offset);
894 err = extend_file(td, f);
895 if (err)
896 break;
897
898 err = __file_invalidate_cache(td, f, old_len,
899 extend_len);
900 close(f->fd);
901 f->fd = -1;
902 if (err)
903 break;
904 }
905 temp_stall_ts = 0;
906 }
907
908 if (err)
909 goto err_out;
910
911 if (!o->zone_size)
912 o->zone_size = o->size;
913
914 /*
915 * iolog already set the total io size, if we read back
916 * stored entries.
917 */
918 if (!o->read_iolog_file)
919 td->total_io_size = o->size * o->loops;
920
921done:
922 if (o->create_only)
923 td->done = 1;
924
925 td_set_runstate(td, old_state);
926 return 0;
927err_offset:
928 log_err("%s: you need to specify valid offset=\n", o->name);
929err_out:
930 td_set_runstate(td, old_state);
931 return 1;
932}
933
934int pre_read_files(struct thread_data *td)
935{
936 struct fio_file *f;
937 unsigned int i;
938
939 dprint(FD_FILE, "pre_read files\n");
940
941 for_each_file(td, f, i) {
942 pre_read_file(td, f);
943 }
944
945 return 1;
946}
947
948static int __init_rand_distribution(struct thread_data *td, struct fio_file *f)
949{
950 unsigned int range_size, seed;
951 unsigned long nranges;
952 uint64_t file_size;
953
954 range_size = min(td->o.min_bs[DDIR_READ], td->o.min_bs[DDIR_WRITE]);
955 file_size = min(f->real_file_size, f->io_size);
956
957 nranges = (file_size + range_size - 1) / range_size;
958
959 seed = jhash(f->file_name, strlen(f->file_name), 0) * td->thread_number;
960 if (!td->o.rand_repeatable)
961 seed = td->rand_seeds[4];
962
963 if (td->o.random_distribution == FIO_RAND_DIST_ZIPF)
964 zipf_init(&f->zipf, nranges, td->o.zipf_theta.u.f, seed);
965 else
966 pareto_init(&f->zipf, nranges, td->o.pareto_h.u.f, seed);
967
968 return 1;
969}
970
971static int init_rand_distribution(struct thread_data *td)
972{
973 struct fio_file *f;
974 unsigned int i;
975 int state;
976
977 if (td->o.random_distribution == FIO_RAND_DIST_RANDOM)
978 return 0;
979
980 state = td->runstate;
981 td_set_runstate(td, TD_SETTING_UP);
982 for_each_file(td, f, i)
983 __init_rand_distribution(td, f);
984 td_set_runstate(td, state);
985
986 return 1;
987}
988
989int init_random_map(struct thread_data *td)
990{
991 unsigned long long blocks;
992 struct fio_file *f;
993 unsigned int i;
994
995 if (init_rand_distribution(td))
996 return 0;
997 if (!td_random(td))
998 return 0;
999
1000 for_each_file(td, f, i) {
1001 uint64_t file_size = min(f->real_file_size, f->io_size);
1002
1003 blocks = file_size / (unsigned long long) td->o.rw_min_bs;
1004
1005 if (td->o.random_generator == FIO_RAND_GEN_LFSR) {
1006 unsigned long seed;
1007
1008 seed = td->rand_seeds[FIO_RAND_BLOCK_OFF];
1009
1010 if (!lfsr_init(&f->lfsr, blocks, seed, seed & 0xF))
1011 continue;
1012 } else if (!td->o.norandommap) {
1013 f->io_axmap = axmap_new(blocks);
1014 if (f->io_axmap)
1015 continue;
1016 } else if (td->o.norandommap)
1017 continue;
1018
1019 if (!td->o.softrandommap) {
1020 log_err("fio: failed allocating random map. If running"
1021 " a large number of jobs, try the 'norandommap'"
1022 " option or set 'softrandommap'. Or give"
1023 " a larger --alloc-size to fio.\n");
1024 return 1;
1025 }
1026
1027 log_info("fio: file %s failed allocating random map. Running "
1028 "job without.\n", f->file_name);
1029 }
1030
1031 return 0;
1032}
1033
1034void close_files(struct thread_data *td)
1035{
1036 struct fio_file *f;
1037 unsigned int i;
1038
1039 for_each_file(td, f, i) {
1040 if (fio_file_open(f))
1041 td_io_close_file(td, f);
1042 }
1043}
1044
1045void close_and_free_files(struct thread_data *td)
1046{
1047 struct fio_file *f;
1048 unsigned int i;
1049
1050 dprint(FD_FILE, "close files\n");
1051
1052 for_each_file(td, f, i) {
1053 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
1054 dprint(FD_FILE, "free unlink %s\n", f->file_name);
1055 unlink(f->file_name);
1056 }
1057
1058 if (fio_file_open(f))
1059 td_io_close_file(td, f);
1060
1061 remove_file_hash(f);
1062
1063 sfree(f->file_name);
1064 f->file_name = NULL;
1065 axmap_free(f->io_axmap);
1066 f->io_axmap = NULL;
1067 sfree(f);
1068 }
1069
1070 td->o.filename = NULL;
1071 free(td->files);
1072 free(td->file_locks);
1073 td->files_index = 0;
1074 td->files = NULL;
1075 td->file_locks = NULL;
1076 td->o.file_lock_mode = FILE_LOCK_NONE;
1077 td->o.nr_files = 0;
1078}
1079
1080static void get_file_type(struct fio_file *f)
1081{
1082 struct stat sb;
1083
1084 if (!strcmp(f->file_name, "-"))
1085 f->filetype = FIO_TYPE_PIPE;
1086 else
1087 f->filetype = FIO_TYPE_FILE;
1088
1089 /* \\.\ is the device namespace in Windows, where every file is
1090 * a block device */
1091 if (strncmp(f->file_name, "\\\\.\\", 4) == 0)
1092 f->filetype = FIO_TYPE_BD;
1093
1094 if (!stat(f->file_name, &sb)) {
1095 if (S_ISBLK(sb.st_mode))
1096 f->filetype = FIO_TYPE_BD;
1097 else if (S_ISCHR(sb.st_mode))
1098 f->filetype = FIO_TYPE_CHAR;
1099 else if (S_ISFIFO(sb.st_mode))
1100 f->filetype = FIO_TYPE_PIPE;
1101 }
1102}
1103
1104int add_file(struct thread_data *td, const char *fname)
1105{
1106 int cur_files = td->files_index;
1107 char file_name[PATH_MAX];
1108 struct fio_file *f;
1109 int len = 0;
1110
1111 dprint(FD_FILE, "add file %s\n", fname);
1112
1113 f = smalloc(sizeof(*f));
1114 if (!f) {
1115 log_err("fio: smalloc OOM\n");
1116 assert(0);
1117 }
1118
1119 f->fd = -1;
1120 f->shadow_fd = -1;
1121 fio_file_reset(td, f);
1122
1123 if (td->files_size <= td->files_index) {
1124 unsigned int new_size = td->o.nr_files + 1;
1125
1126 dprint(FD_FILE, "resize file array to %d files\n", new_size);
1127
1128 td->files = realloc(td->files, new_size * sizeof(f));
1129 if (td->files == NULL) {
1130 log_err("fio: realloc OOM\n");
1131 assert(0);
1132 }
1133 if (td->o.file_lock_mode != FILE_LOCK_NONE) {
1134 td->file_locks = realloc(td->file_locks, new_size);
1135 if (!td->file_locks) {
1136 log_err("fio: realloc OOM\n");
1137 assert(0);
1138 }
1139 td->file_locks[cur_files] = FILE_LOCK_NONE;
1140 }
1141 td->files_size = new_size;
1142 }
1143 td->files[cur_files] = f;
1144 f->fileno = cur_files;
1145
1146 /*
1147 * init function, io engine may not be loaded yet
1148 */
1149 if (td->io_ops && (td->io_ops->flags & FIO_DISKLESSIO))
1150 f->real_file_size = -1ULL;
1151
1152 if (td->o.directory)
1153 len = sprintf(file_name, "%s/", td->o.directory);
1154
1155 sprintf(file_name + len, "%s", fname);
1156 f->file_name = smalloc_strdup(file_name);
1157 if (!f->file_name) {
1158 log_err("fio: smalloc OOM\n");
1159 assert(0);
1160 }
1161
1162 get_file_type(f);
1163
1164 switch (td->o.file_lock_mode) {
1165 case FILE_LOCK_NONE:
1166 break;
1167 case FILE_LOCK_READWRITE:
1168 f->rwlock = fio_rwlock_init();
1169 break;
1170 case FILE_LOCK_EXCLUSIVE:
1171 f->lock = fio_mutex_init(FIO_MUTEX_UNLOCKED);
1172 break;
1173 default:
1174 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
1175 assert(0);
1176 }
1177
1178 td->files_index++;
1179 if (f->filetype == FIO_TYPE_FILE)
1180 td->nr_normal_files++;
1181
1182 dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name,
1183 cur_files);
1184
1185 return cur_files;
1186}
1187
1188int add_file_exclusive(struct thread_data *td, const char *fname)
1189{
1190 struct fio_file *f;
1191 unsigned int i;
1192
1193 for_each_file(td, f, i) {
1194 if (!strcmp(f->file_name, fname))
1195 return i;
1196 }
1197
1198 return add_file(td, fname);
1199}
1200
1201void get_file(struct fio_file *f)
1202{
1203 dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
1204 assert(fio_file_open(f));
1205 f->references++;
1206}
1207
1208int put_file(struct thread_data *td, struct fio_file *f)
1209{
1210 int f_ret = 0, ret = 0;
1211
1212 dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
1213
1214 if (!fio_file_open(f)) {
1215 assert(f->fd == -1);
1216 return 0;
1217 }
1218
1219 assert(f->references);
1220 if (--f->references)
1221 return 0;
1222
1223 if (should_fsync(td) && td->o.fsync_on_close)
1224 f_ret = fsync(f->fd);
1225
1226 if (td->io_ops->close_file)
1227 ret = td->io_ops->close_file(td, f);
1228
1229 if (!ret)
1230 ret = f_ret;
1231
1232 td->nr_open_files--;
1233 fio_file_clear_open(f);
1234 assert(f->fd == -1);
1235 return ret;
1236}
1237
1238void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
1239{
1240 if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1241 return;
1242
1243 if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
1244 if (ddir == DDIR_READ)
1245 fio_rwlock_read(f->rwlock);
1246 else
1247 fio_rwlock_write(f->rwlock);
1248 } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1249 fio_mutex_down(f->lock);
1250
1251 td->file_locks[f->fileno] = td->o.file_lock_mode;
1252}
1253
1254void unlock_file(struct thread_data *td, struct fio_file *f)
1255{
1256 if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1257 return;
1258
1259 if (td->o.file_lock_mode == FILE_LOCK_READWRITE)
1260 fio_rwlock_unlock(f->rwlock);
1261 else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1262 fio_mutex_up(f->lock);
1263
1264 td->file_locks[f->fileno] = FILE_LOCK_NONE;
1265}
1266
1267void unlock_file_all(struct thread_data *td, struct fio_file *f)
1268{
1269 if (td->o.file_lock_mode == FILE_LOCK_NONE || !td->file_locks)
1270 return;
1271 if (td->file_locks[f->fileno] != FILE_LOCK_NONE)
1272 unlock_file(td, f);
1273}
1274
1275static int recurse_dir(struct thread_data *td, const char *dirname)
1276{
1277 struct dirent *dir;
1278 int ret = 0;
1279 DIR *D;
1280
1281 D = opendir(dirname);
1282 if (!D) {
1283 char buf[FIO_VERROR_SIZE];
1284
1285 snprintf(buf, FIO_VERROR_SIZE, "opendir(%s)", dirname);
1286 td_verror(td, errno, buf);
1287 return 1;
1288 }
1289
1290 while ((dir = readdir(D)) != NULL) {
1291 char full_path[PATH_MAX];
1292 struct stat sb;
1293
1294 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
1295 continue;
1296
1297 sprintf(full_path, "%s%s%s", dirname, FIO_OS_PATH_SEPARATOR, dir->d_name);
1298
1299 if (lstat(full_path, &sb) == -1) {
1300 if (errno != ENOENT) {
1301 td_verror(td, errno, "stat");
1302 return 1;
1303 }
1304 }
1305
1306 if (S_ISREG(sb.st_mode)) {
1307 add_file(td, full_path);
1308 td->o.nr_files++;
1309 continue;
1310 }
1311 if (!S_ISDIR(sb.st_mode))
1312 continue;
1313
1314 ret = recurse_dir(td, full_path);
1315 if (ret)
1316 break;
1317 }
1318
1319 closedir(D);
1320 return ret;
1321}
1322
1323int add_dir_files(struct thread_data *td, const char *path)
1324{
1325 int ret = recurse_dir(td, path);
1326
1327 if (!ret)
1328 log_info("fio: opendir added %d files\n", td->o.nr_files);
1329
1330 return ret;
1331}
1332
1333void dup_files(struct thread_data *td, struct thread_data *org)
1334{
1335 struct fio_file *f;
1336 unsigned int i;
1337
1338 dprint(FD_FILE, "dup files: %d\n", org->files_index);
1339
1340 if (!org->files)
1341 return;
1342
1343 td->files = malloc(org->files_index * sizeof(f));
1344
1345 if (td->o.file_lock_mode != FILE_LOCK_NONE)
1346 td->file_locks = malloc(org->files_index);
1347
1348 for_each_file(org, f, i) {
1349 struct fio_file *__f;
1350
1351 __f = smalloc(sizeof(*__f));
1352 if (!__f) {
1353 log_err("fio: smalloc OOM\n");
1354 assert(0);
1355 }
1356 __f->fd = -1;
1357 fio_file_reset(td, __f);
1358
1359 if (f->file_name) {
1360 __f->file_name = smalloc_strdup(f->file_name);
1361 if (!__f->file_name) {
1362 log_err("fio: smalloc OOM\n");
1363 assert(0);
1364 }
1365
1366 __f->filetype = f->filetype;
1367 }
1368
1369 if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1370 __f->lock = f->lock;
1371 else if (td->o.file_lock_mode == FILE_LOCK_READWRITE)
1372 __f->rwlock = f->rwlock;
1373
1374 td->files[i] = __f;
1375 }
1376}
1377
1378/*
1379 * Returns the index that matches the filename, or -1 if not there
1380 */
1381int get_fileno(struct thread_data *td, const char *fname)
1382{
1383 struct fio_file *f;
1384 unsigned int i;
1385
1386 for_each_file(td, f, i)
1387 if (!strcmp(f->file_name, fname))
1388 return i;
1389
1390 return -1;
1391}
1392
1393/*
1394 * For log usage, where we add/open/close files automatically
1395 */
1396void free_release_files(struct thread_data *td)
1397{
1398 close_files(td);
1399 td->files_index = 0;
1400 td->nr_normal_files = 0;
1401}
1402
1403void fio_file_reset(struct thread_data *td, struct fio_file *f)
1404{
1405 f->last_pos = f->file_offset;
1406 f->last_start = -1ULL;
1407 if (f->io_axmap)
1408 axmap_reset(f->io_axmap);
1409 if (td->o.random_generator == FIO_RAND_GEN_LFSR)
1410 lfsr_reset(&f->lfsr, td->rand_seeds[FIO_RAND_BLOCK_OFF]);
1411}
1412
1413int fio_files_done(struct thread_data *td)
1414{
1415 struct fio_file *f;
1416 unsigned int i;
1417
1418 for_each_file(td, f, i)
1419 if (!fio_file_done(f))
1420 return 0;
1421
1422 return 1;
1423}
fio - Flexible IO Tester