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Correct ifdef checks for posix and linux fallocate
[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, f->real_file_size);
83
84 r = posix_fallocate(f->fd, 0, f->real_file_size);
85 if (r > 0) {
86 log_err("fio: posix_fallocate fails: %s\n",
87 strerror(r));
88 }
89 break;
90#ifdef CONFIG_LINUX_FALLOCATE
91 case FIO_FALLOCATE_KEEP_SIZE:
92 dprint(FD_FILE,
93 "fallocate(FALLOC_FL_KEEP_SIZE) "
94 "file %s size %llu\n",
95 f->file_name, f->real_file_size);
96
97 r = fallocate(f->fd, FALLOC_FL_KEEP_SIZE, 0,
98 f->real_file_size);
99 if (r != 0) {
100 td_verror(td, errno, "fallocate");
101 }
102 break;
103#endif /* CONFIG_LINUX_FALLOCATE */
104 default:
105 log_err("fio: unknown fallocate mode: %d\n",
106 td->o.fallocate_mode);
107 assert(0);
108 }
109 }
110#endif /* CONFIG_POSIX_FALLOCATE */
111
112 if (!new_layout)
113 goto done;
114
115 /*
116 * The size will be -1ULL when fill_device is used, so don't truncate
117 * or fallocate this file, just write it
118 */
119 if (!td->o.fill_device) {
120 dprint(FD_FILE, "truncate file %s, size %llu\n", f->file_name,
121 f->real_file_size);
122 if (ftruncate(f->fd, f->real_file_size) == -1) {
123 td_verror(td, errno, "ftruncate");
124 goto err;
125 }
126 }
127
128 b = malloc(td->o.max_bs[DDIR_WRITE]);
129 memset(b, 0, td->o.max_bs[DDIR_WRITE]);
130
131 left = f->real_file_size;
132 while (left && !td->terminate) {
133 bs = td->o.max_bs[DDIR_WRITE];
134 if (bs > left)
135 bs = left;
136
137 r = write(f->fd, b, bs);
138
139 if (r > 0) {
140 left -= r;
141 continue;
142 } else {
143 if (r < 0) {
144 int __e = errno;
145
146 if (__e == ENOSPC) {
147 if (td->o.fill_device)
148 break;
149 log_info("fio: ENOSPC on laying out "
150 "file, stopping\n");
151 break;
152 }
153 td_verror(td, errno, "write");
154 } else
155 td_verror(td, EIO, "write");
156
157 break;
158 }
159 }
160
161 if (td->terminate) {
162 dprint(FD_FILE, "terminate unlink %s\n", f->file_name);
163 unlink(f->file_name);
164 } else if (td->o.create_fsync) {
165 if (fsync(f->fd) < 0) {
166 td_verror(td, errno, "fsync");
167 goto err;
168 }
169 }
170 if (td->o.fill_device && !td_write(td)) {
171 fio_file_clear_size_known(f);
172 if (td_io_get_file_size(td, f))
173 goto err;
174 if (f->io_size > f->real_file_size)
175 f->io_size = f->real_file_size;
176 }
177
178 free(b);
179done:
180 return 0;
181err:
182 close(f->fd);
183 f->fd = -1;
184 return 1;
185}
186
187static int pre_read_file(struct thread_data *td, struct fio_file *f)
188{
189 int r, did_open = 0, old_runstate;
190 unsigned long long left;
191 unsigned int bs;
192 char *b;
193
194 if (td->io_ops->flags & FIO_PIPEIO)
195 return 0;
196
197 if (!fio_file_open(f)) {
198 if (td->io_ops->open_file(td, f)) {
199 log_err("fio: cannot pre-read, failed to open file\n");
200 return 1;
201 }
202 did_open = 1;
203 }
204
205 old_runstate = td->runstate;
206 td_set_runstate(td, TD_PRE_READING);
207
208 bs = td->o.max_bs[DDIR_READ];
209 b = malloc(bs);
210 memset(b, 0, bs);
211
212 lseek(f->fd, f->file_offset, SEEK_SET);
213 left = f->io_size;
214
215 while (left && !td->terminate) {
216 if (bs > left)
217 bs = left;
218
219 r = read(f->fd, b, bs);
220
221 if (r == (int) bs) {
222 left -= bs;
223 continue;
224 } else {
225 td_verror(td, EIO, "pre_read");
226 break;
227 }
228 }
229
230 td_set_runstate(td, old_runstate);
231
232 if (did_open)
233 td->io_ops->close_file(td, f);
234 free(b);
235 return 0;
236}
237
238static unsigned long long get_rand_file_size(struct thread_data *td)
239{
240 unsigned long long ret, sized;
241 unsigned long r;
242
243 if (td->o.use_os_rand) {
244 r = os_random_long(&td->file_size_state);
245 sized = td->o.file_size_high - td->o.file_size_low;
246 ret = (unsigned long long) ((double) sized * (r / (OS_RAND_MAX + 1.0)));
247 } else {
248 r = __rand(&td->__file_size_state);
249 sized = td->o.file_size_high - td->o.file_size_low;
250 ret = (unsigned long long) ((double) sized * (r / (FRAND_MAX + 1.0)));
251 }
252
253 ret += td->o.file_size_low;
254 ret -= (ret % td->o.rw_min_bs);
255 return ret;
256}
257
258static int file_size(struct thread_data *td, struct fio_file *f)
259{
260 struct stat st;
261
262 if (stat(f->file_name, &st) == -1) {
263 td_verror(td, errno, "fstat");
264 return 1;
265 }
266
267 f->real_file_size = st.st_size;
268 return 0;
269}
270
271static int bdev_size(struct thread_data *td, struct fio_file *f)
272{
273 unsigned long long bytes = 0;
274 int r;
275
276 if (td->io_ops->open_file(td, f)) {
277 log_err("fio: failed opening blockdev %s for size check\n",
278 f->file_name);
279 return 1;
280 }
281
282 r = blockdev_size(f, &bytes);
283 if (r) {
284 td_verror(td, r, "blockdev_size");
285 goto err;
286 }
287
288 if (!bytes) {
289 log_err("%s: zero sized block device?\n", f->file_name);
290 goto err;
291 }
292
293 f->real_file_size = bytes;
294 td->io_ops->close_file(td, f);
295 return 0;
296err:
297 td->io_ops->close_file(td, f);
298 return 1;
299}
300
301static int char_size(struct thread_data *td, struct fio_file *f)
302{
303#ifdef FIO_HAVE_CHARDEV_SIZE
304 unsigned long long bytes = 0;
305 int r;
306
307 if (td->io_ops->open_file(td, f)) {
308 log_err("fio: failed opening blockdev %s for size check\n",
309 f->file_name);
310 return 1;
311 }
312
313 r = chardev_size(f, &bytes);
314 if (r) {
315 td_verror(td, r, "chardev_size");
316 goto err;
317 }
318
319 if (!bytes) {
320 log_err("%s: zero sized char device?\n", f->file_name);
321 goto err;
322 }
323
324 f->real_file_size = bytes;
325 td->io_ops->close_file(td, f);
326 return 0;
327err:
328 td->io_ops->close_file(td, f);
329 return 1;
330#else
331 f->real_file_size = -1ULL;
332 return 0;
333#endif
334}
335
336static int get_file_size(struct thread_data *td, struct fio_file *f)
337{
338 int ret = 0;
339
340 if (fio_file_size_known(f))
341 return 0;
342
343 if (f->filetype == FIO_TYPE_FILE)
344 ret = file_size(td, f);
345 else if (f->filetype == FIO_TYPE_BD)
346 ret = bdev_size(td, f);
347 else if (f->filetype == FIO_TYPE_CHAR)
348 ret = char_size(td, f);
349 else
350 f->real_file_size = -1;
351
352 if (ret)
353 return ret;
354
355 if (f->file_offset > f->real_file_size) {
356 log_err("%s: offset extends end (%llu > %llu)\n", td->o.name,
357 f->file_offset, f->real_file_size);
358 return 1;
359 }
360
361 fio_file_set_size_known(f);
362 return 0;
363}
364
365static int __file_invalidate_cache(struct thread_data *td, struct fio_file *f,
366 unsigned long long off,
367 unsigned long long len)
368{
369 int ret = 0;
370
371 if (len == -1ULL)
372 len = f->io_size;
373 if (off == -1ULL)
374 off = f->file_offset;
375
376 if (len == -1ULL || off == -1ULL)
377 return 0;
378
379 dprint(FD_IO, "invalidate cache %s: %llu/%llu\n", f->file_name, off,
380 len);
381
382 /*
383 * FIXME: add blockdev flushing too
384 */
385 if (f->mmap_ptr) {
386 ret = posix_madvise(f->mmap_ptr, f->mmap_sz, POSIX_MADV_DONTNEED);
387#ifdef FIO_MADV_FREE
388 (void) posix_madvise(f->mmap_ptr, f->mmap_sz, FIO_MADV_FREE);
389#endif
390 } else if (f->filetype == FIO_TYPE_FILE) {
391 ret = posix_fadvise(f->fd, off, len, POSIX_FADV_DONTNEED);
392 } else if (f->filetype == FIO_TYPE_BD) {
393 ret = blockdev_invalidate_cache(f);
394 if (ret < 0 && errno == EACCES && geteuid()) {
395 if (!root_warn) {
396 log_err("fio: only root may flush block "
397 "devices. Cache flush bypassed!\n");
398 root_warn = 1;
399 }
400 ret = 0;
401 }
402 } else if (f->filetype == FIO_TYPE_CHAR || f->filetype == FIO_TYPE_PIPE)
403 ret = 0;
404
405 if (ret < 0) {
406 td_verror(td, errno, "invalidate_cache");
407 return 1;
408 } else if (ret > 0) {
409 td_verror(td, ret, "invalidate_cache");
410 return 1;
411 }
412
413 return ret;
414
415}
416
417int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
418{
419 if (!fio_file_open(f))
420 return 0;
421
422 return __file_invalidate_cache(td, f, -1ULL, -1ULL);
423}
424
425int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
426{
427 int ret = 0;
428
429 dprint(FD_FILE, "fd close %s\n", f->file_name);
430
431 remove_file_hash(f);
432
433 if (close(f->fd) < 0)
434 ret = errno;
435
436 f->fd = -1;
437
438 if (f->shadow_fd != -1) {
439 close(f->shadow_fd);
440 f->shadow_fd = -1;
441 }
442
443 return ret;
444}
445
446int file_lookup_open(struct fio_file *f, int flags)
447{
448 struct fio_file *__f;
449 int from_hash;
450
451 __f = lookup_file_hash(f->file_name);
452 if (__f) {
453 dprint(FD_FILE, "found file in hash %s\n", f->file_name);
454 /*
455 * racy, need the __f->lock locked
456 */
457 f->lock = __f->lock;
458 f->lock_owner = __f->lock_owner;
459 f->lock_batch = __f->lock_batch;
460 f->lock_ddir = __f->lock_ddir;
461 from_hash = 1;
462 } else {
463 dprint(FD_FILE, "file not found in hash %s\n", f->file_name);
464 from_hash = 0;
465 }
466
467 f->fd = open(f->file_name, flags, 0600);
468 return from_hash;
469}
470
471static int file_close_shadow_fds(struct thread_data *td)
472{
473 struct fio_file *f;
474 int num_closed = 0;
475 unsigned int i;
476
477 for_each_file(td, f, i) {
478 if (f->shadow_fd == -1)
479 continue;
480
481 close(f->shadow_fd);
482 f->shadow_fd = -1;
483 num_closed++;
484 }
485
486 return num_closed;
487}
488
489int generic_open_file(struct thread_data *td, struct fio_file *f)
490{
491 int is_std = 0;
492 int flags = 0;
493 int from_hash = 0;
494
495 dprint(FD_FILE, "fd open %s\n", f->file_name);
496
497 if (td_trim(td) && f->filetype != FIO_TYPE_BD) {
498 log_err("fio: trim only applies to block device\n");
499 return 1;
500 }
501
502 if (!strcmp(f->file_name, "-")) {
503 if (td_rw(td)) {
504 log_err("fio: can't read/write to stdin/out\n");
505 return 1;
506 }
507 is_std = 1;
508
509 /*
510 * move output logging to stderr, if we are writing to stdout
511 */
512 if (td_write(td))
513 f_out = stderr;
514 }
515
516 if (td_trim(td))
517 goto skip_flags;
518 if (td->o.odirect)
519 flags |= OS_O_DIRECT;
520 if (td->o.sync_io)
521 flags |= O_SYNC;
522 if (td->o.create_on_open)
523 flags |= O_CREAT;
524skip_flags:
525 if (f->filetype != FIO_TYPE_FILE)
526 flags |= FIO_O_NOATIME;
527
528open_again:
529 if (td_write(td)) {
530 if (!read_only)
531 flags |= O_RDWR;
532
533 if (f->filetype == FIO_TYPE_FILE)
534 flags |= O_CREAT;
535
536 if (is_std)
537 f->fd = dup(STDOUT_FILENO);
538 else
539 from_hash = file_lookup_open(f, flags);
540 } else if (td_read(td)) {
541 if (f->filetype == FIO_TYPE_CHAR && !read_only)
542 flags |= O_RDWR;
543 else
544 flags |= O_RDONLY;
545
546 if (is_std)
547 f->fd = dup(STDIN_FILENO);
548 else
549 from_hash = file_lookup_open(f, flags);
550 } else { //td trim
551 flags |= O_RDWR;
552 from_hash = file_lookup_open(f, flags);
553 }
554
555 if (f->fd == -1) {
556 char buf[FIO_VERROR_SIZE];
557 int __e = errno;
558
559 if (__e == EPERM && (flags & FIO_O_NOATIME)) {
560 flags &= ~FIO_O_NOATIME;
561 goto open_again;
562 }
563 if (__e == EMFILE && file_close_shadow_fds(td))
564 goto open_again;
565
566 snprintf(buf, sizeof(buf) - 1, "open(%s)", f->file_name);
567
568 if (__e == EINVAL && (flags & OS_O_DIRECT)) {
569 log_err("fio: looks like your file system does not " \
570 "support direct=1/buffered=0\n");
571 }
572
573 td_verror(td, __e, buf);
574 }
575
576 if (!from_hash && f->fd != -1) {
577 if (add_file_hash(f)) {
578 int fio_unused ret;
579
580 /*
581 * Stash away descriptor for later close. This is to
582 * work-around a "feature" on Linux, where a close of
583 * an fd that has been opened for write will trigger
584 * udev to call blkid to check partitions, fs id, etc.
585 * That polutes the device cache, which can slow down
586 * unbuffered accesses.
587 */
588 if (f->shadow_fd == -1)
589 f->shadow_fd = f->fd;
590 else {
591 /*
592 * OK to ignore, we haven't done anything
593 * with it
594 */
595 ret = generic_close_file(td, f);
596 }
597 goto open_again;
598 }
599 }
600
601 return 0;
602}
603
604int generic_get_file_size(struct thread_data *td, struct fio_file *f)
605{
606 return get_file_size(td, f);
607}
608
609/*
610 * open/close all files, so that ->real_file_size gets set
611 */
612static int get_file_sizes(struct thread_data *td)
613{
614 struct fio_file *f;
615 unsigned int i;
616 int err = 0;
617
618 for_each_file(td, f, i) {
619 dprint(FD_FILE, "get file size for %p/%d/%p\n", f, i,
620 f->file_name);
621
622 if (td_io_get_file_size(td, f)) {
623 if (td->error != ENOENT) {
624 log_err("%s\n", td->verror);
625 err = 1;
626 }
627 clear_error(td);
628 }
629
630 if (f->real_file_size == -1ULL && td->o.size)
631 f->real_file_size = td->o.size / td->o.nr_files;
632 }
633
634 return err;
635}
636
637struct fio_mount {
638 struct flist_head list;
639 const char *base;
640 char __base[256];
641 unsigned int key;
642};
643
644/*
645 * Get free number of bytes for each file on each unique mount.
646 */
647static unsigned long long get_fs_free_counts(struct thread_data *td)
648{
649 struct flist_head *n, *tmp;
650 unsigned long long ret = 0;
651 struct fio_mount *fm;
652 FLIST_HEAD(list);
653 struct fio_file *f;
654 unsigned int i;
655
656 for_each_file(td, f, i) {
657 struct stat sb;
658 char buf[256];
659
660 if (f->filetype == FIO_TYPE_BD || f->filetype == FIO_TYPE_CHAR) {
661 if (f->real_file_size != -1ULL)
662 ret += f->real_file_size;
663 continue;
664 } else if (f->filetype != FIO_TYPE_FILE)
665 continue;
666
667 strcpy(buf, f->file_name);
668
669 if (stat(buf, &sb) < 0) {
670 if (errno != ENOENT)
671 break;
672 strcpy(buf, ".");
673 if (stat(buf, &sb) < 0)
674 break;
675 }
676
677 fm = NULL;
678 flist_for_each(n, &list) {
679 fm = flist_entry(n, struct fio_mount, list);
680 if (fm->key == sb.st_dev)
681 break;
682
683 fm = NULL;
684 }
685
686 if (fm)
687 continue;
688
689 fm = malloc(sizeof(*fm));
690 strcpy(fm->__base, buf);
691 fm->base = basename(fm->__base);
692 fm->key = sb.st_dev;
693 flist_add(&fm->list, &list);
694 }
695
696 flist_for_each_safe(n, tmp, &list) {
697 unsigned long long sz;
698
699 fm = flist_entry(n, struct fio_mount, list);
700 flist_del(&fm->list);
701
702 sz = get_fs_size(fm->base);
703 if (sz && sz != -1ULL)
704 ret += sz;
705
706 free(fm);
707 }
708
709 return ret;
710}
711
712uint64_t get_start_offset(struct thread_data *td)
713{
714 return td->o.start_offset +
715 (td->thread_number - 1) * td->o.offset_increment;
716}
717
718/*
719 * Open the files and setup files sizes, creating files if necessary.
720 */
721int setup_files(struct thread_data *td)
722{
723 unsigned long long total_size, extend_size;
724 struct fio_file *f;
725 unsigned int i;
726 int err = 0, need_extend;
727
728 dprint(FD_FILE, "setup files\n");
729
730 if (td->o.read_iolog_file)
731 goto done;
732
733 /*
734 * if ioengine defines a setup() method, it's responsible for
735 * opening the files and setting f->real_file_size to indicate
736 * the valid range for that file.
737 */
738 if (td->io_ops->setup)
739 err = td->io_ops->setup(td);
740 else
741 err = get_file_sizes(td);
742
743 if (err)
744 return err;
745
746 /*
747 * check sizes. if the files/devices do not exist and the size
748 * isn't passed to fio, abort.
749 */
750 total_size = 0;
751 for_each_file(td, f, i) {
752 if (f->real_file_size == -1ULL)
753 total_size = -1ULL;
754 else
755 total_size += f->real_file_size;
756 }
757
758 if (td->o.fill_device)
759 td->fill_device_size = get_fs_free_counts(td);
760
761 /*
762 * device/file sizes are zero and no size given, punt
763 */
764 if ((!total_size || total_size == -1ULL) && !td->o.size &&
765 !(td->io_ops->flags & FIO_NOIO) && !td->o.fill_device) {
766 log_err("%s: you need to specify size=\n", td->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 (!td->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 = td->o.size / td->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 < td->o.file_size_low ||
791 f->real_file_size > td->o.file_size_high) {
792 if (f->file_offset > td->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 (td->o.file_size_low == td->o.file_size_high) {
799 f->io_size = td->o.file_size_low
800 - f->file_offset;
801 } else {
802 f->io_size = get_rand_file_size(td)
803 - f->file_offset;
804 }
805 } else
806 f->io_size = f->real_file_size - f->file_offset;
807
808 if (f->io_size == -1ULL)
809 total_size = -1ULL;
810 else {
811 if (td->o.size_percent)
812 f->io_size = (f->io_size * td->o.size_percent) / 100;
813 total_size += f->io_size;
814 }
815
816 if (f->filetype == FIO_TYPE_FILE &&
817 (f->io_size + f->file_offset) > f->real_file_size &&
818 !(td->io_ops->flags & FIO_DISKLESSIO)) {
819 if (!td->o.create_on_open) {
820 need_extend++;
821 extend_size += (f->io_size + f->file_offset);
822 } else
823 f->real_file_size = f->io_size + f->file_offset;
824 fio_file_set_extend(f);
825 }
826 }
827
828 if (!td->o.size || td->o.size > total_size)
829 td->o.size = total_size;
830
831 /*
832 * See if we need to extend some files
833 */
834 if (need_extend) {
835 temp_stall_ts = 1;
836 if (output_format == FIO_OUTPUT_NORMAL)
837 log_info("%s: Laying out IO file(s) (%u file(s) /"
838 " %lluMB)\n", td->o.name, need_extend,
839 extend_size >> 20);
840
841 for_each_file(td, f, i) {
842 unsigned long long old_len = -1ULL, extend_len = -1ULL;
843
844 if (!fio_file_extend(f))
845 continue;
846
847 assert(f->filetype == FIO_TYPE_FILE);
848 fio_file_clear_extend(f);
849 if (!td->o.fill_device) {
850 old_len = f->real_file_size;
851 extend_len = f->io_size + f->file_offset -
852 old_len;
853 }
854 f->real_file_size = (f->io_size + f->file_offset);
855 err = extend_file(td, f);
856 if (err)
857 break;
858
859 err = __file_invalidate_cache(td, f, old_len,
860 extend_len);
861 close(f->fd);
862 f->fd = -1;
863 if (err)
864 break;
865 }
866 temp_stall_ts = 0;
867 }
868
869 if (err)
870 return err;
871
872 if (!td->o.zone_size)
873 td->o.zone_size = td->o.size;
874
875 /*
876 * iolog already set the total io size, if we read back
877 * stored entries.
878 */
879 if (!td->o.read_iolog_file)
880 td->total_io_size = td->o.size * td->o.loops;
881
882done:
883 if (td->o.create_only)
884 td->done = 1;
885
886 return 0;
887err_offset:
888 log_err("%s: you need to specify valid offset=\n", td->o.name);
889 return 1;
890}
891
892int pre_read_files(struct thread_data *td)
893{
894 struct fio_file *f;
895 unsigned int i;
896
897 dprint(FD_FILE, "pre_read files\n");
898
899 for_each_file(td, f, i) {
900 pre_read_file(td, f);
901 }
902
903 return 1;
904}
905
906static int __init_rand_distribution(struct thread_data *td, struct fio_file *f)
907{
908 unsigned int range_size, seed;
909 unsigned long nranges;
910 uint64_t file_size;
911
912 range_size = min(td->o.min_bs[DDIR_READ], td->o.min_bs[DDIR_WRITE]);
913 file_size = min(f->real_file_size, f->io_size);
914
915 nranges = (file_size + range_size - 1) / range_size;
916
917 seed = jhash(f->file_name, strlen(f->file_name), 0) * td->thread_number;
918 if (!td->o.rand_repeatable)
919 seed = td->rand_seeds[4];
920
921 if (td->o.random_distribution == FIO_RAND_DIST_ZIPF)
922 zipf_init(&f->zipf, nranges, td->o.zipf_theta, seed);
923 else
924 pareto_init(&f->zipf, nranges, td->o.pareto_h, seed);
925
926 return 1;
927}
928
929static int init_rand_distribution(struct thread_data *td)
930{
931 struct fio_file *f;
932 unsigned int i;
933 int state;
934
935 if (td->o.random_distribution == FIO_RAND_DIST_RANDOM)
936 return 0;
937
938 state = td->runstate;
939 td_set_runstate(td, TD_SETTING_UP);
940 for_each_file(td, f, i)
941 __init_rand_distribution(td, f);
942 td_set_runstate(td, state);
943
944 return 1;
945}
946
947int init_random_map(struct thread_data *td)
948{
949 unsigned long long blocks;
950 struct fio_file *f;
951 unsigned int i;
952
953 if (init_rand_distribution(td))
954 return 0;
955 if (!td_random(td))
956 return 0;
957
958 for_each_file(td, f, i) {
959 uint64_t file_size = min(f->real_file_size, f->io_size);
960
961 blocks = (file_size + td->o.rw_min_bs - 1) /
962 (unsigned long long) td->o.rw_min_bs;
963 if (td->o.random_generator == FIO_RAND_GEN_LFSR) {
964 unsigned long seed;
965
966 seed = td->rand_seeds[FIO_RAND_BLOCK_OFF];
967
968 if (!lfsr_init(&f->lfsr, blocks, seed))
969 continue;
970 } else if (!td->o.norandommap) {
971 f->io_axmap = axmap_new(blocks);
972 if (f->io_axmap)
973 continue;
974 } else if (td->o.norandommap)
975 continue;
976
977 if (!td->o.softrandommap) {
978 log_err("fio: failed allocating random map. If running"
979 " a large number of jobs, try the 'norandommap'"
980 " option or set 'softrandommap'. Or give"
981 " a larger --alloc-size to fio.\n");
982 return 1;
983 }
984
985 log_info("fio: file %s failed allocating random map. Running "
986 "job without.\n", f->file_name);
987 }
988
989 return 0;
990}
991
992void close_files(struct thread_data *td)
993{
994 struct fio_file *f;
995 unsigned int i;
996
997 for_each_file(td, f, i) {
998 if (fio_file_open(f))
999 td_io_close_file(td, f);
1000 }
1001}
1002
1003void close_and_free_files(struct thread_data *td)
1004{
1005 struct fio_file *f;
1006 unsigned int i;
1007
1008 dprint(FD_FILE, "close files\n");
1009
1010 for_each_file(td, f, i) {
1011 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
1012 dprint(FD_FILE, "free unlink %s\n", f->file_name);
1013 unlink(f->file_name);
1014 }
1015
1016 if (fio_file_open(f))
1017 td_io_close_file(td, f);
1018
1019 remove_file_hash(f);
1020
1021 sfree(f->file_name);
1022 f->file_name = NULL;
1023 axmap_free(f->io_axmap);
1024 f->io_axmap = NULL;
1025 sfree(f);
1026 }
1027
1028 td->o.filename = NULL;
1029 free(td->files);
1030 td->files_index = 0;
1031 td->files = NULL;
1032 td->o.nr_files = 0;
1033}
1034
1035static void get_file_type(struct fio_file *f)
1036{
1037 struct stat sb;
1038
1039 if (!strcmp(f->file_name, "-"))
1040 f->filetype = FIO_TYPE_PIPE;
1041 else
1042 f->filetype = FIO_TYPE_FILE;
1043
1044 /* \\.\ is the device namespace in Windows, where every file is
1045 * a block device */
1046 if (strncmp(f->file_name, "\\\\.\\", 4) == 0)
1047 f->filetype = FIO_TYPE_BD;
1048
1049 if (!stat(f->file_name, &sb)) {
1050 if (S_ISBLK(sb.st_mode))
1051 f->filetype = FIO_TYPE_BD;
1052 else if (S_ISCHR(sb.st_mode))
1053 f->filetype = FIO_TYPE_CHAR;
1054 else if (S_ISFIFO(sb.st_mode))
1055 f->filetype = FIO_TYPE_PIPE;
1056 }
1057}
1058
1059int add_file(struct thread_data *td, const char *fname)
1060{
1061 int cur_files = td->files_index;
1062 char file_name[PATH_MAX];
1063 struct fio_file *f;
1064 int len = 0;
1065
1066 dprint(FD_FILE, "add file %s\n", fname);
1067
1068 f = smalloc(sizeof(*f));
1069 if (!f) {
1070 log_err("fio: smalloc OOM\n");
1071 assert(0);
1072 }
1073
1074 f->fd = -1;
1075 f->shadow_fd = -1;
1076 fio_file_reset(td, f);
1077
1078 if (td->files_size <= td->files_index) {
1079 unsigned int new_size = td->o.nr_files + 1;
1080
1081 dprint(FD_FILE, "resize file array to %d files\n", new_size);
1082
1083 td->files = realloc(td->files, new_size * sizeof(f));
1084 if (td->files == NULL) {
1085 log_err("fio: realloc OOM\n");
1086 assert(0);
1087 }
1088 td->files_size = new_size;
1089 }
1090 td->files[cur_files] = f;
1091 f->fileno = cur_files;
1092
1093 /*
1094 * init function, io engine may not be loaded yet
1095 */
1096 if (td->io_ops && (td->io_ops->flags & FIO_DISKLESSIO))
1097 f->real_file_size = -1ULL;
1098
1099 if (td->o.directory)
1100 len = sprintf(file_name, "%s/", td->o.directory);
1101
1102 sprintf(file_name + len, "%s", fname);
1103 f->file_name = smalloc_strdup(file_name);
1104 if (!f->file_name) {
1105 log_err("fio: smalloc OOM\n");
1106 assert(0);
1107 }
1108
1109 get_file_type(f);
1110
1111 switch (td->o.file_lock_mode) {
1112 case FILE_LOCK_NONE:
1113 break;
1114 case FILE_LOCK_READWRITE:
1115 f->lock = fio_mutex_rw_init();
1116 break;
1117 case FILE_LOCK_EXCLUSIVE:
1118 f->lock = fio_mutex_init(FIO_MUTEX_UNLOCKED);
1119 break;
1120 default:
1121 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
1122 assert(0);
1123 }
1124
1125 td->files_index++;
1126 if (f->filetype == FIO_TYPE_FILE)
1127 td->nr_normal_files++;
1128
1129 dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name,
1130 cur_files);
1131
1132 return cur_files;
1133}
1134
1135int add_file_exclusive(struct thread_data *td, const char *fname)
1136{
1137 struct fio_file *f;
1138 unsigned int i;
1139
1140 for_each_file(td, f, i) {
1141 if (!strcmp(f->file_name, fname))
1142 return i;
1143 }
1144
1145 return add_file(td, fname);
1146}
1147
1148void get_file(struct fio_file *f)
1149{
1150 dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
1151 assert(fio_file_open(f));
1152 f->references++;
1153}
1154
1155int put_file(struct thread_data *td, struct fio_file *f)
1156{
1157 int f_ret = 0, ret = 0;
1158
1159 dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
1160
1161 if (!fio_file_open(f)) {
1162 assert(f->fd == -1);
1163 return 0;
1164 }
1165
1166 assert(f->references);
1167 if (--f->references)
1168 return 0;
1169
1170 if (should_fsync(td) && td->o.fsync_on_close)
1171 f_ret = fsync(f->fd);
1172
1173 if (td->io_ops->close_file)
1174 ret = td->io_ops->close_file(td, f);
1175
1176 if (!ret)
1177 ret = f_ret;
1178
1179 td->nr_open_files--;
1180 fio_file_clear_open(f);
1181 assert(f->fd == -1);
1182 return ret;
1183}
1184
1185void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
1186{
1187 if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1188 return;
1189
1190 if (f->lock_owner == td && f->lock_batch--)
1191 return;
1192
1193 if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
1194 if (ddir == DDIR_READ)
1195 fio_mutex_down_read(f->lock);
1196 else
1197 fio_mutex_down_write(f->lock);
1198 } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1199 fio_mutex_down(f->lock);
1200
1201 f->lock_owner = td;
1202 f->lock_batch = td->o.lockfile_batch;
1203 f->lock_ddir = ddir;
1204}
1205
1206void unlock_file(struct thread_data *td, struct fio_file *f)
1207{
1208 if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1209 return;
1210 if (f->lock_batch)
1211 return;
1212
1213 if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
1214 const int is_read = f->lock_ddir == DDIR_READ;
1215 int val = fio_mutex_getval(f->lock);
1216
1217 if ((is_read && val == 1) || (!is_read && val == -1))
1218 f->lock_owner = NULL;
1219
1220 if (is_read)
1221 fio_mutex_up_read(f->lock);
1222 else
1223 fio_mutex_up_write(f->lock);
1224 } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE) {
1225 int val = fio_mutex_getval(f->lock);
1226
1227 if (val == 0)
1228 f->lock_owner = NULL;
1229
1230 fio_mutex_up(f->lock);
1231 }
1232}
1233
1234void unlock_file_all(struct thread_data *td, struct fio_file *f)
1235{
1236 if (f->lock_owner != td)
1237 return;
1238
1239 f->lock_batch = 0;
1240 unlock_file(td, f);
1241}
1242
1243static int recurse_dir(struct thread_data *td, const char *dirname)
1244{
1245 struct dirent *dir;
1246 int ret = 0;
1247 DIR *D;
1248
1249 D = opendir(dirname);
1250 if (!D) {
1251 char buf[FIO_VERROR_SIZE];
1252
1253 snprintf(buf, FIO_VERROR_SIZE - 1, "opendir(%s)", dirname);
1254 td_verror(td, errno, buf);
1255 return 1;
1256 }
1257
1258 while ((dir = readdir(D)) != NULL) {
1259 char full_path[PATH_MAX];
1260 struct stat sb;
1261
1262 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
1263 continue;
1264
1265 sprintf(full_path, "%s%s%s", dirname, FIO_OS_PATH_SEPARATOR, dir->d_name);
1266
1267 if (lstat(full_path, &sb) == -1) {
1268 if (errno != ENOENT) {
1269 td_verror(td, errno, "stat");
1270 return 1;
1271 }
1272 }
1273
1274 if (S_ISREG(sb.st_mode)) {
1275 add_file(td, full_path);
1276 td->o.nr_files++;
1277 continue;
1278 }
1279 if (!S_ISDIR(sb.st_mode))
1280 continue;
1281
1282 ret = recurse_dir(td, full_path);
1283 if (ret)
1284 break;
1285 }
1286
1287 closedir(D);
1288 return ret;
1289}
1290
1291int add_dir_files(struct thread_data *td, const char *path)
1292{
1293 int ret = recurse_dir(td, path);
1294
1295 if (!ret)
1296 log_info("fio: opendir added %d files\n", td->o.nr_files);
1297
1298 return ret;
1299}
1300
1301void dup_files(struct thread_data *td, struct thread_data *org)
1302{
1303 struct fio_file *f;
1304 unsigned int i;
1305
1306 dprint(FD_FILE, "dup files: %d\n", org->files_index);
1307
1308 if (!org->files)
1309 return;
1310
1311 td->files = malloc(org->files_index * sizeof(f));
1312
1313 for_each_file(org, f, i) {
1314 struct fio_file *__f;
1315
1316 __f = smalloc(sizeof(*__f));
1317 if (!__f) {
1318 log_err("fio: smalloc OOM\n");
1319 assert(0);
1320 }
1321 __f->fd = -1;
1322 fio_file_reset(td, __f);
1323
1324 if (f->file_name) {
1325 __f->file_name = smalloc_strdup(f->file_name);
1326 if (!__f->file_name) {
1327 log_err("fio: smalloc OOM\n");
1328 assert(0);
1329 }
1330
1331 __f->filetype = f->filetype;
1332 }
1333
1334 td->files[i] = __f;
1335 }
1336}
1337
1338/*
1339 * Returns the index that matches the filename, or -1 if not there
1340 */
1341int get_fileno(struct thread_data *td, const char *fname)
1342{
1343 struct fio_file *f;
1344 unsigned int i;
1345
1346 for_each_file(td, f, i)
1347 if (!strcmp(f->file_name, fname))
1348 return i;
1349
1350 return -1;
1351}
1352
1353/*
1354 * For log usage, where we add/open/close files automatically
1355 */
1356void free_release_files(struct thread_data *td)
1357{
1358 close_files(td);
1359 td->files_index = 0;
1360 td->nr_normal_files = 0;
1361}
1362
1363void fio_file_reset(struct thread_data *td, struct fio_file *f)
1364{
1365 f->last_pos = f->file_offset;
1366 f->last_start = -1ULL;
1367 if (f->io_axmap)
1368 axmap_reset(f->io_axmap);
1369 if (td->o.random_generator == FIO_RAND_GEN_LFSR)
1370 lfsr_reset(&f->lfsr, td->rand_seeds[FIO_RAND_BLOCK_OFF]);
1371}
fio - Flexible IO Tester