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filesetup: make trim jobs respect --readonly during file open
[fio.git] / filesetup.c
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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
9#include "fio.h"
10#include "smalloc.h"
11#include "filehash.h"
12#include "options.h"
13#include "os/os.h"
14#include "hash.h"
15#include "lib/axmap.h"
16#include "rwlock.h"
17
18#ifdef CONFIG_LINUX_FALLOCATE
19#include <linux/falloc.h>
20#endif
21
22static FLIST_HEAD(filename_list);
23
24/*
25 * List entry for filename_list
26 */
27struct file_name {
28 struct flist_head list;
29 char *filename;
30};
31
32static inline void clear_error(struct thread_data *td)
33{
34 td->error = 0;
35 td->verror[0] = '\0';
36}
37
38static int native_fallocate(struct thread_data *td, struct fio_file *f)
39{
40 bool success;
41
42 success = fio_fallocate(f, 0, f->real_file_size);
43 dprint(FD_FILE, "native fallocate of file %s size %llu was "
44 "%ssuccessful\n", f->file_name,
45 (unsigned long long) f->real_file_size,
46 !success ? "un": "");
47
48 if (success)
49 return false;
50
51 if (errno == ENOSYS)
52 dprint(FD_FILE, "native fallocate is not implemented\n");
53
54 return true;
55}
56
57static void fallocate_file(struct thread_data *td, struct fio_file *f)
58{
59 if (td->o.fill_device)
60 return;
61
62 switch (td->o.fallocate_mode) {
63 case FIO_FALLOCATE_NATIVE:
64 native_fallocate(td, f);
65 break;
66 case FIO_FALLOCATE_NONE:
67 break;
68#ifdef CONFIG_POSIX_FALLOCATE
69 case FIO_FALLOCATE_POSIX: {
70 int r;
71
72 dprint(FD_FILE, "posix_fallocate file %s size %llu\n",
73 f->file_name,
74 (unsigned long long) f->real_file_size);
75
76 r = posix_fallocate(f->fd, 0, f->real_file_size);
77 if (r > 0)
78 log_err("fio: posix_fallocate fails: %s\n", strerror(r));
79 break;
80 }
81#endif /* CONFIG_POSIX_FALLOCATE */
82#ifdef CONFIG_LINUX_FALLOCATE
83 case FIO_FALLOCATE_KEEP_SIZE: {
84 int r;
85
86 dprint(FD_FILE, "fallocate(FALLOC_FL_KEEP_SIZE) "
87 "file %s size %llu\n", f->file_name,
88 (unsigned long long) f->real_file_size);
89
90 r = fallocate(f->fd, FALLOC_FL_KEEP_SIZE, 0, f->real_file_size);
91 if (r != 0)
92 td_verror(td, errno, "fallocate");
93
94 break;
95 }
96#endif /* CONFIG_LINUX_FALLOCATE */
97 default:
98 log_err("fio: unknown fallocate mode: %d\n", td->o.fallocate_mode);
99 assert(0);
100 }
101}
102
103/*
104 * Leaves f->fd open on success, caller must close
105 */
106static int extend_file(struct thread_data *td, struct fio_file *f)
107{
108 int new_layout = 0, unlink_file = 0, flags;
109 unsigned long long left;
110 unsigned int bs;
111 char *b = NULL;
112
113 if (read_only) {
114 log_err("fio: refusing extend of file due to read-only\n");
115 return 0;
116 }
117
118 /*
119 * check if we need to lay the file out complete again. fio
120 * does that for operations involving reads, or for writes
121 * where overwrite is set
122 */
123 if (td_read(td) ||
124 (td_write(td) && td->o.overwrite && !td->o.file_append) ||
125 (td_write(td) && td_ioengine_flagged(td, FIO_NOEXTEND)))
126 new_layout = 1;
127 if (td_write(td) && !td->o.overwrite && !td->o.file_append)
128 unlink_file = 1;
129
130 if (unlink_file || new_layout) {
131 int ret;
132
133 dprint(FD_FILE, "layout unlink %s\n", f->file_name);
134
135 ret = td_io_unlink_file(td, f);
136 if (ret != 0 && ret != ENOENT) {
137 td_verror(td, errno, "unlink");
138 return 1;
139 }
140 }
141
142 flags = O_WRONLY;
143 if (td->o.allow_create)
144 flags |= O_CREAT;
145 if (new_layout)
146 flags |= O_TRUNC;
147
148#ifdef WIN32
149 flags |= _O_BINARY;
150#endif
151
152 dprint(FD_FILE, "open file %s, flags %x\n", f->file_name, flags);
153 f->fd = open(f->file_name, flags, 0644);
154 if (f->fd < 0) {
155 int err = errno;
156
157 if (err == ENOENT && !td->o.allow_create)
158 log_err("fio: file creation disallowed by "
159 "allow_file_create=0\n");
160 else
161 td_verror(td, err, "open");
162 return 1;
163 }
164
165 fallocate_file(td, f);
166
167 /*
168 * If our jobs don't require regular files initially, we're done.
169 */
170 if (!new_layout)
171 goto done;
172
173 /*
174 * The size will be -1ULL when fill_device is used, so don't truncate
175 * or fallocate this file, just write it
176 */
177 if (!td->o.fill_device) {
178 dprint(FD_FILE, "truncate file %s, size %llu\n", f->file_name,
179 (unsigned long long) f->real_file_size);
180 if (ftruncate(f->fd, f->real_file_size) == -1) {
181 if (errno != EFBIG) {
182 td_verror(td, errno, "ftruncate");
183 goto err;
184 }
185 }
186 }
187
188 left = f->real_file_size;
189 bs = td->o.max_bs[DDIR_WRITE];
190 if (bs > left)
191 bs = left;
192
193 b = malloc(bs);
194 if (!b) {
195 td_verror(td, errno, "malloc");
196 goto err;
197 }
198
199 while (left && !td->terminate) {
200 ssize_t r;
201
202 if (bs > left)
203 bs = left;
204
205 fill_io_buffer(td, b, bs, bs);
206
207 r = write(f->fd, b, bs);
208
209 if (r > 0) {
210 left -= r;
211 continue;
212 } else {
213 if (r < 0) {
214 int __e = errno;
215
216 if (__e == ENOSPC) {
217 if (td->o.fill_device)
218 break;
219 log_info("fio: ENOSPC on laying out "
220 "file, stopping\n");
221 break;
222 }
223 td_verror(td, errno, "write");
224 } else
225 td_verror(td, EIO, "write");
226
227 break;
228 }
229 }
230
231 if (td->terminate) {
232 dprint(FD_FILE, "terminate unlink %s\n", f->file_name);
233 td_io_unlink_file(td, f);
234 } else if (td->o.create_fsync) {
235 if (fsync(f->fd) < 0) {
236 td_verror(td, errno, "fsync");
237 goto err;
238 }
239 }
240 if (td->o.fill_device && !td_write(td)) {
241 fio_file_clear_size_known(f);
242 if (td_io_get_file_size(td, f))
243 goto err;
244 if (f->io_size > f->real_file_size)
245 f->io_size = f->real_file_size;
246 }
247
248 free(b);
249done:
250 return 0;
251err:
252 close(f->fd);
253 f->fd = -1;
254 if (b)
255 free(b);
256 return 1;
257}
258
259static bool pre_read_file(struct thread_data *td, struct fio_file *f)
260{
261 int r, did_open = 0, old_runstate;
262 unsigned long long left;
263 unsigned int bs;
264 bool ret = true;
265 char *b;
266
267 if (td_ioengine_flagged(td, FIO_PIPEIO) ||
268 td_ioengine_flagged(td, FIO_NOIO))
269 return true;
270
271 if (f->filetype == FIO_TYPE_CHAR)
272 return true;
273
274 if (!fio_file_open(f)) {
275 if (td->io_ops->open_file(td, f)) {
276 log_err("fio: cannot pre-read, failed to open file\n");
277 return false;
278 }
279 did_open = 1;
280 }
281
282 old_runstate = td_bump_runstate(td, TD_PRE_READING);
283
284 left = f->io_size;
285 bs = td->o.max_bs[DDIR_READ];
286 if (bs > left)
287 bs = left;
288
289 b = malloc(bs);
290 if (!b) {
291 td_verror(td, errno, "malloc");
292 ret = false;
293 goto error;
294 }
295 memset(b, 0, bs);
296
297 if (lseek(f->fd, f->file_offset, SEEK_SET) < 0) {
298 td_verror(td, errno, "lseek");
299 log_err("fio: failed to lseek pre-read file\n");
300 ret = false;
301 goto error;
302 }
303
304 while (left && !td->terminate) {
305 if (bs > left)
306 bs = left;
307
308 r = read(f->fd, b, bs);
309
310 if (r == (int) bs) {
311 left -= bs;
312 continue;
313 } else {
314 td_verror(td, EIO, "pre_read");
315 break;
316 }
317 }
318
319error:
320 td_restore_runstate(td, old_runstate);
321
322 if (did_open)
323 td->io_ops->close_file(td, f);
324
325 free(b);
326 return ret;
327}
328
329unsigned long long get_rand_file_size(struct thread_data *td)
330{
331 unsigned long long ret, sized;
332 uint64_t frand_max;
333 unsigned long r;
334
335 frand_max = rand_max(&td->file_size_state);
336 r = __rand(&td->file_size_state);
337 sized = td->o.file_size_high - td->o.file_size_low;
338 ret = (unsigned long long) ((double) sized * (r / (frand_max + 1.0)));
339 ret += td->o.file_size_low;
340 ret -= (ret % td->o.rw_min_bs);
341 return ret;
342}
343
344static int file_size(struct thread_data *td, struct fio_file *f)
345{
346 struct stat st;
347
348 if (stat(f->file_name, &st) == -1) {
349 td_verror(td, errno, "fstat");
350 return 1;
351 }
352
353 f->real_file_size = st.st_size;
354 return 0;
355}
356
357static int bdev_size(struct thread_data *td, struct fio_file *f)
358{
359 unsigned long long bytes = 0;
360 int r;
361
362 if (td->io_ops->open_file(td, f)) {
363 log_err("fio: failed opening blockdev %s for size check\n",
364 f->file_name);
365 return 1;
366 }
367
368 r = blockdev_size(f, &bytes);
369 if (r) {
370 td_verror(td, r, "blockdev_size");
371 goto err;
372 }
373
374 if (!bytes) {
375 log_err("%s: zero sized block device?\n", f->file_name);
376 goto err;
377 }
378
379 f->real_file_size = bytes;
380 td->io_ops->close_file(td, f);
381 return 0;
382err:
383 td->io_ops->close_file(td, f);
384 return 1;
385}
386
387static int char_size(struct thread_data *td, struct fio_file *f)
388{
389#ifdef FIO_HAVE_CHARDEV_SIZE
390 unsigned long long bytes = 0;
391 int r;
392
393 if (td->io_ops->open_file(td, f)) {
394 log_err("fio: failed opening chardev %s for size check\n",
395 f->file_name);
396 return 1;
397 }
398
399 r = chardev_size(f, &bytes);
400 if (r) {
401 td_verror(td, r, "chardev_size");
402 goto err;
403 }
404
405 if (!bytes) {
406 log_err("%s: zero sized char device?\n", f->file_name);
407 goto err;
408 }
409
410 f->real_file_size = bytes;
411 td->io_ops->close_file(td, f);
412 return 0;
413err:
414 td->io_ops->close_file(td, f);
415 return 1;
416#else
417 f->real_file_size = -1ULL;
418 return 0;
419#endif
420}
421
422static int get_file_size(struct thread_data *td, struct fio_file *f)
423{
424 int ret = 0;
425
426 if (fio_file_size_known(f))
427 return 0;
428
429 if (f->filetype == FIO_TYPE_FILE)
430 ret = file_size(td, f);
431 else if (f->filetype == FIO_TYPE_BLOCK)
432 ret = bdev_size(td, f);
433 else if (f->filetype == FIO_TYPE_CHAR)
434 ret = char_size(td, f);
435 else {
436 f->real_file_size = -1;
437 log_info("%s: failed to get file size of %s\n", td->o.name,
438 f->file_name);
439 return 1; /* avoid offset extends end error message */
440 }
441
442 /*
443 * Leave ->real_file_size with 0 since it could be expectation
444 * of initial setup for regular files.
445 */
446 if (ret)
447 return ret;
448
449 /*
450 * ->file_offset normally hasn't been initialized yet, so this
451 * is basically always false unless ->real_file_size is -1, but
452 * if ->real_file_size is -1 this message doesn't make sense.
453 * As a result, this message is basically useless.
454 */
455 if (f->file_offset > f->real_file_size) {
456 log_err("%s: offset extends end (%llu > %llu)\n", td->o.name,
457 (unsigned long long) f->file_offset,
458 (unsigned long long) f->real_file_size);
459 return 1;
460 }
461
462 fio_file_set_size_known(f);
463 return 0;
464}
465
466static int __file_invalidate_cache(struct thread_data *td, struct fio_file *f,
467 unsigned long long off,
468 unsigned long long len)
469{
470 int errval = 0, ret = 0;
471
472#ifdef CONFIG_ESX
473 return 0;
474#endif
475
476 if (len == -1ULL)
477 len = f->io_size;
478 if (off == -1ULL)
479 off = f->file_offset;
480
481 if (len == -1ULL || off == -1ULL)
482 return 0;
483
484 if (td->io_ops->invalidate) {
485 dprint(FD_IO, "invalidate %s cache %s\n", td->io_ops->name,
486 f->file_name);
487 ret = td->io_ops->invalidate(td, f);
488 if (ret < 0)
489 errval = -ret;
490 } else if (td_ioengine_flagged(td, FIO_DISKLESSIO)) {
491 dprint(FD_IO, "invalidate not supported by ioengine %s\n",
492 td->io_ops->name);
493 } else if (f->filetype == FIO_TYPE_FILE) {
494 dprint(FD_IO, "declare unneeded cache %s: %llu/%llu\n",
495 f->file_name, off, len);
496 ret = posix_fadvise(f->fd, off, len, POSIX_FADV_DONTNEED);
497 if (ret)
498 errval = ret;
499 } else if (f->filetype == FIO_TYPE_BLOCK) {
500 int retry_count = 0;
501
502 dprint(FD_IO, "drop page cache %s\n", f->file_name);
503 ret = blockdev_invalidate_cache(f);
504 while (ret < 0 && errno == EAGAIN && retry_count++ < 25) {
505 /*
506 * Linux multipath devices reject ioctl while
507 * the maps are being updated. That window can
508 * last tens of milliseconds; we'll try up to
509 * a quarter of a second.
510 */
511 usleep(10000);
512 ret = blockdev_invalidate_cache(f);
513 }
514 if (ret < 0 && errno == EACCES && geteuid()) {
515 if (!fio_did_warn(FIO_WARN_ROOT_FLUSH)) {
516 log_err("fio: only root may flush block "
517 "devices. Cache flush bypassed!\n");
518 }
519 }
520 if (ret < 0)
521 errval = errno;
522 } else if (f->filetype == FIO_TYPE_CHAR ||
523 f->filetype == FIO_TYPE_PIPE) {
524 dprint(FD_IO, "invalidate not supported %s\n", f->file_name);
525 }
526
527 /*
528 * Cache flushing isn't a fatal condition, and we know it will
529 * happen on some platforms where we don't have the proper
530 * function to flush eg block device caches. So just warn and
531 * continue on our way.
532 */
533 if (errval)
534 log_info("fio: cache invalidation of %s failed: %s\n",
535 f->file_name, strerror(errval));
536
537 return 0;
538
539}
540
541int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
542{
543 if (!fio_file_open(f))
544 return 0;
545
546 return __file_invalidate_cache(td, f, -1ULL, -1ULL);
547}
548
549int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
550{
551 int ret = 0;
552
553 dprint(FD_FILE, "fd close %s\n", f->file_name);
554
555 remove_file_hash(f);
556
557 if (close(f->fd) < 0)
558 ret = errno;
559
560 f->fd = -1;
561
562 if (f->shadow_fd != -1) {
563 close(f->shadow_fd);
564 f->shadow_fd = -1;
565 }
566
567 f->engine_pos = 0;
568 return ret;
569}
570
571int file_lookup_open(struct fio_file *f, int flags)
572{
573 struct fio_file *__f;
574 int from_hash;
575
576 __f = lookup_file_hash(f->file_name);
577 if (__f) {
578 dprint(FD_FILE, "found file in hash %s\n", f->file_name);
579 f->lock = __f->lock;
580 from_hash = 1;
581 } else {
582 dprint(FD_FILE, "file not found in hash %s\n", f->file_name);
583 from_hash = 0;
584 }
585
586#ifdef WIN32
587 flags |= _O_BINARY;
588#endif
589
590 f->fd = open(f->file_name, flags, 0600);
591 return from_hash;
592}
593
594static int file_close_shadow_fds(struct thread_data *td)
595{
596 struct fio_file *f;
597 int num_closed = 0;
598 unsigned int i;
599
600 for_each_file(td, f, i) {
601 if (f->shadow_fd == -1)
602 continue;
603
604 close(f->shadow_fd);
605 f->shadow_fd = -1;
606 num_closed++;
607 }
608
609 return num_closed;
610}
611
612int generic_open_file(struct thread_data *td, struct fio_file *f)
613{
614 int is_std = 0;
615 int flags = 0;
616 int from_hash = 0;
617
618 dprint(FD_FILE, "fd open %s\n", f->file_name);
619
620 if (!strcmp(f->file_name, "-")) {
621 if (td_rw(td)) {
622 log_err("fio: can't read/write to stdin/out\n");
623 return 1;
624 }
625 is_std = 1;
626
627 /*
628 * move output logging to stderr, if we are writing to stdout
629 */
630 if (td_write(td))
631 f_out = stderr;
632 }
633
634 if (td_trim(td))
635 goto skip_flags;
636 if (td->o.odirect)
637 flags |= OS_O_DIRECT;
638 if (td->o.oatomic) {
639 if (!FIO_O_ATOMIC) {
640 td_verror(td, EINVAL, "OS does not support atomic IO");
641 return 1;
642 }
643 flags |= OS_O_DIRECT | FIO_O_ATOMIC;
644 }
645 if (td->o.sync_io)
646 flags |= O_SYNC;
647 if (td->o.create_on_open && td->o.allow_create)
648 flags |= O_CREAT;
649skip_flags:
650 if (f->filetype != FIO_TYPE_FILE)
651 flags |= FIO_O_NOATIME;
652
653open_again:
654 if (td_write(td)) {
655 if (!read_only)
656 flags |= O_RDWR;
657
658 if (f->filetype == FIO_TYPE_FILE && td->o.allow_create)
659 flags |= O_CREAT;
660
661 if (is_std)
662 f->fd = dup(STDOUT_FILENO);
663 else
664 from_hash = file_lookup_open(f, flags);
665 } else if (td_read(td)) {
666 if (f->filetype == FIO_TYPE_CHAR && !read_only)
667 flags |= O_RDWR;
668 else
669 flags |= O_RDONLY;
670
671 if (is_std)
672 f->fd = dup(STDIN_FILENO);
673 else
674 from_hash = file_lookup_open(f, flags);
675 } else if (td_trim(td)) {
676 assert(!td_rw(td)); /* should have matched above */
677 if (!read_only)
678 flags |= O_RDWR;
679 from_hash = file_lookup_open(f, flags);
680 }
681
682 if (f->fd == -1) {
683 char buf[FIO_VERROR_SIZE];
684 int __e = errno;
685
686 if (__e == EPERM && (flags & FIO_O_NOATIME)) {
687 flags &= ~FIO_O_NOATIME;
688 goto open_again;
689 }
690 if (__e == EMFILE && file_close_shadow_fds(td))
691 goto open_again;
692
693 snprintf(buf, sizeof(buf), "open(%s)", f->file_name);
694
695 if (__e == EINVAL && (flags & OS_O_DIRECT)) {
696 log_err("fio: looks like your file system does not " \
697 "support direct=1/buffered=0\n");
698 }
699
700 td_verror(td, __e, buf);
701 return 1;
702 }
703
704 if (!from_hash && f->fd != -1) {
705 if (add_file_hash(f)) {
706 int fio_unused ret;
707
708 /*
709 * Stash away descriptor for later close. This is to
710 * work-around a "feature" on Linux, where a close of
711 * an fd that has been opened for write will trigger
712 * udev to call blkid to check partitions, fs id, etc.
713 * That pollutes the device cache, which can slow down
714 * unbuffered accesses.
715 */
716 if (f->shadow_fd == -1)
717 f->shadow_fd = f->fd;
718 else {
719 /*
720 * OK to ignore, we haven't done anything
721 * with it
722 */
723 ret = generic_close_file(td, f);
724 }
725 goto open_again;
726 }
727 }
728
729 return 0;
730}
731
732/*
733 * This function i.e. get_file_size() is the default .get_file_size
734 * implementation of majority of I/O engines.
735 */
736int generic_get_file_size(struct thread_data *td, struct fio_file *f)
737{
738 return get_file_size(td, f);
739}
740
741/*
742 * open/close all files, so that ->real_file_size gets set
743 */
744static int get_file_sizes(struct thread_data *td)
745{
746 struct fio_file *f;
747 unsigned int i;
748 int err = 0;
749
750 for_each_file(td, f, i) {
751 dprint(FD_FILE, "get file size for %p/%d/%s\n", f, i,
752 f->file_name);
753
754 if (td_io_get_file_size(td, f)) {
755 if (td->error != ENOENT) {
756 log_err("%s\n", td->verror);
757 err = 1;
758 break;
759 }
760 clear_error(td);
761 }
762
763 /*
764 * There are corner cases where we end up with -1 for
765 * ->real_file_size due to unsupported file type, etc.
766 * We then just set to size option value divided by number
767 * of files, similar to the way file ->io_size is set.
768 * stat(2) failure doesn't set ->real_file_size to -1.
769 */
770 if (f->real_file_size == -1ULL && td->o.size)
771 f->real_file_size = td->o.size / td->o.nr_files;
772 }
773
774 return err;
775}
776
777struct fio_mount {
778 struct flist_head list;
779 const char *base;
780 char __base[256];
781 unsigned int key;
782};
783
784/*
785 * Get free number of bytes for each file on each unique mount.
786 */
787static unsigned long long get_fs_free_counts(struct thread_data *td)
788{
789 struct flist_head *n, *tmp;
790 unsigned long long ret = 0;
791 struct fio_mount *fm;
792 FLIST_HEAD(list);
793 struct fio_file *f;
794 unsigned int i;
795
796 for_each_file(td, f, i) {
797 struct stat sb;
798 char buf[256];
799
800 if (f->filetype == FIO_TYPE_BLOCK || f->filetype == FIO_TYPE_CHAR) {
801 if (f->real_file_size != -1ULL)
802 ret += f->real_file_size;
803 continue;
804 } else if (f->filetype != FIO_TYPE_FILE)
805 continue;
806
807 buf[255] = '\0';
808 strncpy(buf, f->file_name, 255);
809
810 if (stat(buf, &sb) < 0) {
811 if (errno != ENOENT)
812 break;
813 strcpy(buf, ".");
814 if (stat(buf, &sb) < 0)
815 break;
816 }
817
818 fm = NULL;
819 flist_for_each(n, &list) {
820 fm = flist_entry(n, struct fio_mount, list);
821 if (fm->key == sb.st_dev)
822 break;
823
824 fm = NULL;
825 }
826
827 if (fm)
828 continue;
829
830 fm = calloc(1, sizeof(*fm));
831 strncpy(fm->__base, buf, sizeof(fm->__base) - 1);
832 fm->base = basename(fm->__base);
833 fm->key = sb.st_dev;
834 flist_add(&fm->list, &list);
835 }
836
837 flist_for_each_safe(n, tmp, &list) {
838 unsigned long long sz;
839
840 fm = flist_entry(n, struct fio_mount, list);
841 flist_del(&fm->list);
842
843 sz = get_fs_free_size(fm->base);
844 if (sz && sz != -1ULL)
845 ret += sz;
846
847 free(fm);
848 }
849
850 return ret;
851}
852
853uint64_t get_start_offset(struct thread_data *td, struct fio_file *f)
854{
855 struct thread_options *o = &td->o;
856 unsigned long long align_bs;
857 unsigned long long offset;
858
859 if (o->file_append && f->filetype == FIO_TYPE_FILE)
860 return f->real_file_size;
861
862 if (o->start_offset_percent > 0) {
863 /*
864 * if offset_align is provided, set initial offset
865 */
866 if (fio_option_is_set(o, start_offset_align)) {
867 align_bs = o->start_offset_align;
868 } else {
869 /* else take the minimum block size */
870 align_bs = td_min_bs(td);
871 }
872
873 /* calculate the raw offset */
874 offset = (f->real_file_size * o->start_offset_percent / 100) +
875 (td->subjob_number * o->offset_increment);
876
877 /*
878 * block align the offset at the next available boundary at
879 * ceiling(offset / align_bs) * align_bs
880 */
881 offset = (offset / align_bs + (offset % align_bs != 0)) * align_bs;
882
883 } else {
884 /* start_offset_percent not set */
885 offset = o->start_offset +
886 td->subjob_number * o->offset_increment;
887 }
888
889 return offset;
890}
891
892/*
893 * Open the files and setup files sizes, creating files if necessary.
894 */
895int setup_files(struct thread_data *td)
896{
897 unsigned long long total_size, extend_size;
898 struct thread_options *o = &td->o;
899 struct fio_file *f;
900 unsigned int i, nr_fs_extra = 0;
901 int err = 0, need_extend;
902 int old_state;
903 const unsigned int bs = td_min_bs(td);
904 uint64_t fs = 0;
905
906 dprint(FD_FILE, "setup files\n");
907
908 old_state = td_bump_runstate(td, TD_SETTING_UP);
909
910 if (o->read_iolog_file)
911 goto done;
912
913 /*
914 * Find out physical size of files or devices for this thread,
915 * before we determine I/O size and range of our targets.
916 * If ioengine defines a setup() method, it's responsible for
917 * opening the files and setting f->real_file_size to indicate
918 * the valid range for that file.
919 */
920 if (td->io_ops->setup)
921 err = td->io_ops->setup(td);
922 else
923 err = get_file_sizes(td);
924
925 if (err)
926 goto err_out;
927
928 /*
929 * check sizes. if the files/devices do not exist and the size
930 * isn't passed to fio, abort.
931 */
932 total_size = 0;
933 for_each_file(td, f, i) {
934 f->fileno = i;
935 if (f->real_file_size == -1ULL)
936 total_size = -1ULL;
937 else
938 total_size += f->real_file_size;
939 }
940
941 if (o->fill_device)
942 td->fill_device_size = get_fs_free_counts(td);
943
944 /*
945 * device/file sizes are zero and no size given, punt
946 */
947 if ((!total_size || total_size == -1ULL) && !o->size &&
948 !td_ioengine_flagged(td, FIO_NOIO) && !o->fill_device &&
949 !(o->nr_files && (o->file_size_low || o->file_size_high))) {
950 log_err("%s: you need to specify size=\n", o->name);
951 td_verror(td, EINVAL, "total_file_size");
952 goto err_out;
953 }
954
955 /*
956 * Calculate per-file size and potential extra size for the
957 * first files, if needed (i.e. if we don't have a fixed size).
958 */
959 if (!o->file_size_low && o->nr_files) {
960 uint64_t all_fs;
961
962 fs = o->size / o->nr_files;
963 all_fs = fs * o->nr_files;
964
965 if (all_fs < o->size)
966 nr_fs_extra = (o->size - all_fs) / bs;
967 }
968
969 /*
970 * now file sizes are known, so we can set ->io_size. if size= is
971 * not given, ->io_size is just equal to ->real_file_size. if size
972 * is given, ->io_size is size / nr_files.
973 */
974 extend_size = total_size = 0;
975 need_extend = 0;
976 for_each_file(td, f, i) {
977 f->file_offset = get_start_offset(td, f);
978
979 /*
980 * Update ->io_size depending on options specified.
981 * ->file_size_low being 0 means filesize option isn't set.
982 * Non zero ->file_size_low equals ->file_size_high means
983 * filesize option is set in a fixed size format.
984 * Non zero ->file_size_low not equals ->file_size_high means
985 * filesize option is set in a range format.
986 */
987 if (!o->file_size_low) {
988 /*
989 * no file size or range given, file size is equal to
990 * total size divided by number of files. If the size
991 * doesn't divide nicely with the min blocksize,
992 * make the first files bigger.
993 */
994 f->io_size = fs;
995 if (nr_fs_extra) {
996 nr_fs_extra--;
997 f->io_size += bs;
998 }
999
1000 /*
1001 * We normally don't come here for regular files, but
1002 * if the result is 0 for a regular file, set it to the
1003 * real file size. This could be size of the existing
1004 * one if it already exists, but otherwise will be set
1005 * to 0. A new file won't be created because
1006 * ->io_size + ->file_offset equals ->real_file_size.
1007 */
1008 if (!f->io_size) {
1009 if (f->file_offset > f->real_file_size)
1010 goto err_offset;
1011 f->io_size = f->real_file_size - f->file_offset;
1012 if (!f->io_size)
1013 log_info("fio: file %s may be ignored\n",
1014 f->file_name);
1015 }
1016 } else if (f->real_file_size < o->file_size_low ||
1017 f->real_file_size > o->file_size_high) {
1018 if (f->file_offset > o->file_size_low)
1019 goto err_offset;
1020 /*
1021 * file size given. if it's fixed, use that. if it's a
1022 * range, generate a random size in-between.
1023 */
1024 if (o->file_size_low == o->file_size_high)
1025 f->io_size = o->file_size_low - f->file_offset;
1026 else {
1027 f->io_size = get_rand_file_size(td)
1028 - f->file_offset;
1029 }
1030 } else
1031 f->io_size = f->real_file_size - f->file_offset;
1032
1033 if (f->io_size == -1ULL)
1034 total_size = -1ULL;
1035 else {
1036 if (o->size_percent && o->size_percent != 100) {
1037 uint64_t file_size;
1038
1039 file_size = f->io_size + f->file_offset;
1040 f->io_size = (file_size *
1041 o->size_percent) / 100;
1042 if (f->io_size > (file_size - f->file_offset))
1043 f->io_size = file_size - f->file_offset;
1044
1045 f->io_size -= (f->io_size % td_min_bs(td));
1046 }
1047 total_size += f->io_size;
1048 }
1049
1050 if (f->filetype == FIO_TYPE_FILE &&
1051 (f->io_size + f->file_offset) > f->real_file_size &&
1052 !td_ioengine_flagged(td, FIO_DISKLESSIO)) {
1053 if (!o->create_on_open) {
1054 need_extend++;
1055 extend_size += (f->io_size + f->file_offset);
1056 fio_file_set_extend(f);
1057 } else
1058 f->real_file_size = f->io_size + f->file_offset;
1059 }
1060 }
1061
1062 if (td->o.block_error_hist) {
1063 int len;
1064
1065 assert(td->o.nr_files == 1); /* checked in fixup_options */
1066 f = td->files[0];
1067 len = f->io_size / td->o.bs[DDIR_TRIM];
1068 if (len > MAX_NR_BLOCK_INFOS || len <= 0) {
1069 log_err("fio: cannot calculate block histogram with "
1070 "%d trim blocks, maximum %d\n",
1071 len, MAX_NR_BLOCK_INFOS);
1072 td_verror(td, EINVAL, "block_error_hist");
1073 goto err_out;
1074 }
1075
1076 td->ts.nr_block_infos = len;
1077 for (i = 0; i < len; i++)
1078 td->ts.block_infos[i] =
1079 BLOCK_INFO(0, BLOCK_STATE_UNINIT);
1080 } else
1081 td->ts.nr_block_infos = 0;
1082
1083 if (!o->size || (total_size && o->size > total_size))
1084 o->size = total_size;
1085
1086 if (o->size < td_min_bs(td)) {
1087 log_err("fio: blocksize too large for data set\n");
1088 goto err_out;
1089 }
1090
1091 /*
1092 * See if we need to extend some files, typically needed when our
1093 * target regular files don't exist yet, but our jobs require them
1094 * initially due to read I/Os.
1095 */
1096 if (need_extend) {
1097 temp_stall_ts = 1;
1098 if (output_format & FIO_OUTPUT_NORMAL) {
1099 log_info("%s: Laying out IO file%s (%u file%s / %s%lluMiB)\n",
1100 o->name,
1101 need_extend > 1 ? "s" : "",
1102 need_extend,
1103 need_extend > 1 ? "s" : "",
1104 need_extend > 1 ? "total " : "",
1105 extend_size >> 20);
1106 }
1107
1108 for_each_file(td, f, i) {
1109 unsigned long long old_len = -1ULL, extend_len = -1ULL;
1110
1111 if (!fio_file_extend(f))
1112 continue;
1113
1114 assert(f->filetype == FIO_TYPE_FILE);
1115 fio_file_clear_extend(f);
1116 if (!o->fill_device) {
1117 old_len = f->real_file_size;
1118 extend_len = f->io_size + f->file_offset -
1119 old_len;
1120 }
1121 f->real_file_size = (f->io_size + f->file_offset);
1122 err = extend_file(td, f);
1123 if (err)
1124 break;
1125
1126 err = __file_invalidate_cache(td, f, old_len,
1127 extend_len);
1128
1129 /*
1130 * Shut up static checker
1131 */
1132 if (f->fd != -1)
1133 close(f->fd);
1134
1135 f->fd = -1;
1136 if (err)
1137 break;
1138 }
1139 temp_stall_ts = 0;
1140 }
1141
1142 if (err)
1143 goto err_out;
1144
1145 if (!o->zone_size)
1146 o->zone_size = o->size;
1147
1148 /*
1149 * iolog already set the total io size, if we read back
1150 * stored entries.
1151 */
1152 if (!o->read_iolog_file) {
1153 if (o->io_size)
1154 td->total_io_size = o->io_size * o->loops;
1155 else
1156 td->total_io_size = o->size * o->loops;
1157 }
1158
1159done:
1160 if (o->create_only)
1161 td->done = 1;
1162
1163 td_restore_runstate(td, old_state);
1164 return 0;
1165err_offset:
1166 log_err("%s: you need to specify valid offset=\n", o->name);
1167err_out:
1168 td_restore_runstate(td, old_state);
1169 return 1;
1170}
1171
1172bool pre_read_files(struct thread_data *td)
1173{
1174 struct fio_file *f;
1175 unsigned int i;
1176
1177 dprint(FD_FILE, "pre_read files\n");
1178
1179 for_each_file(td, f, i) {
1180 if (!pre_read_file(td, f))
1181 return false;
1182 }
1183
1184 return true;
1185}
1186
1187static void __init_rand_distribution(struct thread_data *td, struct fio_file *f)
1188{
1189 unsigned int range_size, seed;
1190 unsigned long nranges;
1191 uint64_t fsize;
1192
1193 range_size = min(td->o.min_bs[DDIR_READ], td->o.min_bs[DDIR_WRITE]);
1194 fsize = min(f->real_file_size, f->io_size);
1195
1196 nranges = (fsize + range_size - 1) / range_size;
1197
1198 seed = jhash(f->file_name, strlen(f->file_name), 0) * td->thread_number;
1199 if (!td->o.rand_repeatable)
1200 seed = td->rand_seeds[4];
1201
1202 if (td->o.random_distribution == FIO_RAND_DIST_ZIPF)
1203 zipf_init(&f->zipf, nranges, td->o.zipf_theta.u.f, seed);
1204 else if (td->o.random_distribution == FIO_RAND_DIST_PARETO)
1205 pareto_init(&f->zipf, nranges, td->o.pareto_h.u.f, seed);
1206 else if (td->o.random_distribution == FIO_RAND_DIST_GAUSS)
1207 gauss_init(&f->gauss, nranges, td->o.gauss_dev.u.f, seed);
1208}
1209
1210static bool init_rand_distribution(struct thread_data *td)
1211{
1212 struct fio_file *f;
1213 unsigned int i;
1214 int state;
1215
1216 if (td->o.random_distribution == FIO_RAND_DIST_RANDOM)
1217 return false;
1218
1219 state = td_bump_runstate(td, TD_SETTING_UP);
1220
1221 for_each_file(td, f, i)
1222 __init_rand_distribution(td, f);
1223
1224 td_restore_runstate(td, state);
1225 return true;
1226}
1227
1228/*
1229 * Check if the number of blocks exceeds the randomness capability of
1230 * the selected generator. Tausworthe is 32-bit, the others are fullly
1231 * 64-bit capable.
1232 */
1233static int check_rand_gen_limits(struct thread_data *td, struct fio_file *f,
1234 uint64_t blocks)
1235{
1236 if (blocks <= FRAND32_MAX)
1237 return 0;
1238 if (td->o.random_generator != FIO_RAND_GEN_TAUSWORTHE)
1239 return 0;
1240
1241 /*
1242 * If the user hasn't specified a random generator, switch
1243 * to tausworthe64 with informational warning. If the user did
1244 * specify one, just warn.
1245 */
1246 log_info("fio: file %s exceeds 32-bit tausworthe random generator.\n",
1247 f->file_name);
1248
1249 if (!fio_option_is_set(&td->o, random_generator)) {
1250 log_info("fio: Switching to tausworthe64. Use the "
1251 "random_generator= option to get rid of this "
1252 "warning.\n");
1253 td->o.random_generator = FIO_RAND_GEN_TAUSWORTHE64;
1254 return 0;
1255 }
1256
1257 /*
1258 * Just make this information to avoid breaking scripts.
1259 */
1260 log_info("fio: Use the random_generator= option to switch to lfsr or "
1261 "tausworthe64.\n");
1262 return 0;
1263}
1264
1265bool init_random_map(struct thread_data *td)
1266{
1267 unsigned long long blocks;
1268 struct fio_file *f;
1269 unsigned int i;
1270
1271 if (init_rand_distribution(td))
1272 return true;
1273 if (!td_random(td))
1274 return true;
1275
1276 for_each_file(td, f, i) {
1277 uint64_t fsize = min(f->real_file_size, f->io_size);
1278
1279 blocks = fsize / (unsigned long long) td->o.rw_min_bs;
1280
1281 if (check_rand_gen_limits(td, f, blocks))
1282 return false;
1283
1284 if (td->o.random_generator == FIO_RAND_GEN_LFSR) {
1285 unsigned long seed;
1286
1287 seed = td->rand_seeds[FIO_RAND_BLOCK_OFF];
1288
1289 if (!lfsr_init(&f->lfsr, blocks, seed, 0)) {
1290 fio_file_set_lfsr(f);
1291 continue;
1292 }
1293 } else if (!td->o.norandommap) {
1294 f->io_axmap = axmap_new(blocks);
1295 if (f->io_axmap) {
1296 fio_file_set_axmap(f);
1297 continue;
1298 }
1299 } else if (td->o.norandommap)
1300 continue;
1301
1302 if (!td->o.softrandommap) {
1303 log_err("fio: failed allocating random map. If running"
1304 " a large number of jobs, try the 'norandommap'"
1305 " option or set 'softrandommap'. Or give"
1306 " a larger --alloc-size to fio.\n");
1307 return false;
1308 }
1309
1310 log_info("fio: file %s failed allocating random map. Running "
1311 "job without.\n", f->file_name);
1312 }
1313
1314 return true;
1315}
1316
1317void close_files(struct thread_data *td)
1318{
1319 struct fio_file *f;
1320 unsigned int i;
1321
1322 for_each_file(td, f, i) {
1323 if (fio_file_open(f))
1324 td_io_close_file(td, f);
1325 }
1326}
1327
1328void close_and_free_files(struct thread_data *td)
1329{
1330 struct fio_file *f;
1331 unsigned int i;
1332 bool use_free = td_ioengine_flagged(td, FIO_NOFILEHASH);
1333
1334 dprint(FD_FILE, "close files\n");
1335
1336 for_each_file(td, f, i) {
1337 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
1338 dprint(FD_FILE, "free unlink %s\n", f->file_name);
1339 td_io_unlink_file(td, f);
1340 }
1341
1342 if (fio_file_open(f))
1343 td_io_close_file(td, f);
1344
1345 remove_file_hash(f);
1346
1347 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
1348 dprint(FD_FILE, "free unlink %s\n", f->file_name);
1349 td_io_unlink_file(td, f);
1350 }
1351
1352 if (use_free)
1353 free(f->file_name);
1354 else
1355 sfree(f->file_name);
1356 f->file_name = NULL;
1357 if (fio_file_axmap(f)) {
1358 axmap_free(f->io_axmap);
1359 f->io_axmap = NULL;
1360 }
1361 if (use_free)
1362 free(f);
1363 else
1364 sfree(f);
1365 }
1366
1367 td->o.filename = NULL;
1368 free(td->files);
1369 free(td->file_locks);
1370 td->files_index = 0;
1371 td->files = NULL;
1372 td->file_locks = NULL;
1373 td->o.file_lock_mode = FILE_LOCK_NONE;
1374 td->o.nr_files = 0;
1375}
1376
1377static void get_file_type(struct fio_file *f)
1378{
1379 struct stat sb;
1380
1381 if (!strcmp(f->file_name, "-"))
1382 f->filetype = FIO_TYPE_PIPE;
1383 else
1384 f->filetype = FIO_TYPE_FILE;
1385
1386#ifdef WIN32
1387 /* \\.\ is the device namespace in Windows, where every file is
1388 * a block device */
1389 if (strncmp(f->file_name, "\\\\.\\", 4) == 0)
1390 f->filetype = FIO_TYPE_BLOCK;
1391#endif
1392
1393 if (!stat(f->file_name, &sb)) {
1394 if (S_ISBLK(sb.st_mode))
1395 f->filetype = FIO_TYPE_BLOCK;
1396 else if (S_ISCHR(sb.st_mode))
1397 f->filetype = FIO_TYPE_CHAR;
1398 else if (S_ISFIFO(sb.st_mode))
1399 f->filetype = FIO_TYPE_PIPE;
1400 }
1401}
1402
1403static bool __is_already_allocated(const char *fname, bool set)
1404{
1405 struct flist_head *entry;
1406 bool ret;
1407
1408 ret = file_bloom_exists(fname, set);
1409 if (!ret)
1410 return ret;
1411
1412 flist_for_each(entry, &filename_list) {
1413 struct file_name *fn;
1414
1415 fn = flist_entry(entry, struct file_name, list);
1416
1417 if (!strcmp(fn->filename, fname))
1418 return true;
1419 }
1420
1421 return false;
1422}
1423
1424static bool is_already_allocated(const char *fname)
1425{
1426 bool ret;
1427
1428 fio_file_hash_lock();
1429 ret = __is_already_allocated(fname, false);
1430 fio_file_hash_unlock();
1431
1432 return ret;
1433}
1434
1435static void set_already_allocated(const char *fname)
1436{
1437 struct file_name *fn;
1438
1439 fn = malloc(sizeof(struct file_name));
1440 fn->filename = strdup(fname);
1441
1442 fio_file_hash_lock();
1443 if (!__is_already_allocated(fname, true)) {
1444 flist_add_tail(&fn->list, &filename_list);
1445 fn = NULL;
1446 }
1447 fio_file_hash_unlock();
1448
1449 if (fn) {
1450 free(fn->filename);
1451 free(fn);
1452 }
1453}
1454
1455static void free_already_allocated(void)
1456{
1457 struct flist_head *entry, *tmp;
1458 struct file_name *fn;
1459
1460 if (flist_empty(&filename_list))
1461 return;
1462
1463 fio_file_hash_lock();
1464 flist_for_each_safe(entry, tmp, &filename_list) {
1465 fn = flist_entry(entry, struct file_name, list);
1466 free(fn->filename);
1467 flist_del(&fn->list);
1468 free(fn);
1469 }
1470
1471 fio_file_hash_unlock();
1472}
1473
1474static struct fio_file *alloc_new_file(struct thread_data *td)
1475{
1476 struct fio_file *f;
1477
1478 if (td_ioengine_flagged(td, FIO_NOFILEHASH))
1479 f = calloc(1, sizeof(*f));
1480 else
1481 f = scalloc(1, sizeof(*f));
1482 if (!f) {
1483 assert(0);
1484 return NULL;
1485 }
1486
1487 f->fd = -1;
1488 f->shadow_fd = -1;
1489 fio_file_reset(td, f);
1490 return f;
1491}
1492
1493bool exists_and_not_regfile(const char *filename)
1494{
1495 struct stat sb;
1496
1497 if (lstat(filename, &sb) == -1)
1498 return false;
1499
1500#ifndef WIN32 /* NOT Windows */
1501 if (S_ISREG(sb.st_mode))
1502 return false;
1503#else
1504 /* \\.\ is the device namespace in Windows, where every file
1505 * is a device node */
1506 if (S_ISREG(sb.st_mode) && strncmp(filename, "\\\\.\\", 4) != 0)
1507 return false;
1508#endif
1509
1510 return true;
1511}
1512
1513static bool create_work_dirs(struct thread_data *td, const char *fname)
1514{
1515 char path[PATH_MAX];
1516 char *start, *end;
1517
1518 if (td->o.directory) {
1519 snprintf(path, PATH_MAX, "%s%c%s", td->o.directory,
1520 FIO_OS_PATH_SEPARATOR, fname);
1521 start = strstr(path, fname);
1522 } else {
1523 snprintf(path, PATH_MAX, "%s", fname);
1524 start = path;
1525 }
1526
1527 end = start;
1528 while ((end = strchr(end, FIO_OS_PATH_SEPARATOR)) != NULL) {
1529 if (end == start)
1530 break;
1531 *end = '\0';
1532 errno = 0;
1533#ifdef CONFIG_HAVE_MKDIR_TWO
1534 if (mkdir(path, 0600) && errno != EEXIST) {
1535#else
1536 if (mkdir(path) && errno != EEXIST) {
1537#endif
1538 log_err("fio: failed to create dir (%s): %d\n",
1539 start, errno);
1540 return false;
1541 }
1542 *end = FIO_OS_PATH_SEPARATOR;
1543 end++;
1544 }
1545 td->flags |= TD_F_DIRS_CREATED;
1546 return true;
1547}
1548
1549int add_file(struct thread_data *td, const char *fname, int numjob, int inc)
1550{
1551 int cur_files = td->files_index;
1552 char file_name[PATH_MAX];
1553 struct fio_file *f;
1554 int len = 0;
1555
1556 dprint(FD_FILE, "add file %s\n", fname);
1557
1558 if (td->o.directory)
1559 len = set_name_idx(file_name, PATH_MAX, td->o.directory, numjob,
1560 td->o.unique_filename);
1561
1562 sprintf(file_name + len, "%s", fname);
1563
1564 if (strchr(fname, FIO_OS_PATH_SEPARATOR) &&
1565 !(td->flags & TD_F_DIRS_CREATED) &&
1566 !create_work_dirs(td, fname))
1567 return 1;
1568
1569 /* clean cloned siblings using existing files */
1570 if (numjob && is_already_allocated(file_name) &&
1571 !exists_and_not_regfile(fname))
1572 return 0;
1573
1574 f = alloc_new_file(td);
1575
1576 if (td->files_size <= td->files_index) {
1577 unsigned int new_size = td->o.nr_files + 1;
1578
1579 dprint(FD_FILE, "resize file array to %d files\n", new_size);
1580
1581 td->files = realloc(td->files, new_size * sizeof(f));
1582 if (td->files == NULL) {
1583 log_err("fio: realloc OOM\n");
1584 assert(0);
1585 }
1586 if (td->o.file_lock_mode != FILE_LOCK_NONE) {
1587 td->file_locks = realloc(td->file_locks, new_size);
1588 if (!td->file_locks) {
1589 log_err("fio: realloc OOM\n");
1590 assert(0);
1591 }
1592 td->file_locks[cur_files] = FILE_LOCK_NONE;
1593 }
1594 td->files_size = new_size;
1595 }
1596 td->files[cur_files] = f;
1597 f->fileno = cur_files;
1598
1599 /*
1600 * init function, io engine may not be loaded yet
1601 */
1602 if (td->io_ops && td_ioengine_flagged(td, FIO_DISKLESSIO))
1603 f->real_file_size = -1ULL;
1604
1605 if (td_ioengine_flagged(td, FIO_NOFILEHASH))
1606 f->file_name = strdup(file_name);
1607 else
1608 f->file_name = smalloc_strdup(file_name);
1609
1610 /* can't handle smalloc failure from here */
1611 assert(f->file_name);
1612
1613 get_file_type(f);
1614
1615 switch (td->o.file_lock_mode) {
1616 case FILE_LOCK_NONE:
1617 break;
1618 case FILE_LOCK_READWRITE:
1619 f->rwlock = fio_rwlock_init();
1620 break;
1621 case FILE_LOCK_EXCLUSIVE:
1622 f->lock = fio_sem_init(FIO_SEM_UNLOCKED);
1623 break;
1624 default:
1625 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
1626 assert(0);
1627 }
1628
1629 td->files_index++;
1630
1631 if (td->o.numjobs > 1)
1632 set_already_allocated(file_name);
1633
1634 if (inc)
1635 td->o.nr_files++;
1636
1637 dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name,
1638 cur_files);
1639
1640 return cur_files;
1641}
1642
1643int add_file_exclusive(struct thread_data *td, const char *fname)
1644{
1645 struct fio_file *f;
1646 unsigned int i;
1647
1648 for_each_file(td, f, i) {
1649 if (!strcmp(f->file_name, fname))
1650 return i;
1651 }
1652
1653 return add_file(td, fname, 0, 1);
1654}
1655
1656void get_file(struct fio_file *f)
1657{
1658 dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
1659 assert(fio_file_open(f));
1660 f->references++;
1661}
1662
1663int put_file(struct thread_data *td, struct fio_file *f)
1664{
1665 int f_ret = 0, ret = 0;
1666
1667 dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
1668
1669 if (!fio_file_open(f)) {
1670 assert(f->fd == -1);
1671 return 0;
1672 }
1673
1674 assert(f->references);
1675 if (--f->references)
1676 return 0;
1677
1678 if (should_fsync(td) && td->o.fsync_on_close) {
1679 f_ret = fsync(f->fd);
1680 if (f_ret < 0)
1681 f_ret = errno;
1682 }
1683
1684 if (td->io_ops->close_file)
1685 ret = td->io_ops->close_file(td, f);
1686
1687 if (!ret)
1688 ret = f_ret;
1689
1690 td->nr_open_files--;
1691 fio_file_clear_open(f);
1692 assert(f->fd == -1);
1693 return ret;
1694}
1695
1696void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
1697{
1698 if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1699 return;
1700
1701 if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
1702 if (ddir == DDIR_READ)
1703 fio_rwlock_read(f->rwlock);
1704 else
1705 fio_rwlock_write(f->rwlock);
1706 } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1707 fio_sem_down(f->lock);
1708
1709 td->file_locks[f->fileno] = td->o.file_lock_mode;
1710}
1711
1712void unlock_file(struct thread_data *td, struct fio_file *f)
1713{
1714 if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1715 return;
1716
1717 if (td->o.file_lock_mode == FILE_LOCK_READWRITE)
1718 fio_rwlock_unlock(f->rwlock);
1719 else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1720 fio_sem_up(f->lock);
1721
1722 td->file_locks[f->fileno] = FILE_LOCK_NONE;
1723}
1724
1725void unlock_file_all(struct thread_data *td, struct fio_file *f)
1726{
1727 if (td->o.file_lock_mode == FILE_LOCK_NONE || !td->file_locks)
1728 return;
1729 if (td->file_locks[f->fileno] != FILE_LOCK_NONE)
1730 unlock_file(td, f);
1731}
1732
1733static bool recurse_dir(struct thread_data *td, const char *dirname)
1734{
1735 struct dirent *dir;
1736 bool ret = false;
1737 DIR *D;
1738
1739 D = opendir(dirname);
1740 if (!D) {
1741 char buf[FIO_VERROR_SIZE];
1742
1743 snprintf(buf, FIO_VERROR_SIZE, "opendir(%s)", dirname);
1744 td_verror(td, errno, buf);
1745 return true;
1746 }
1747
1748 while ((dir = readdir(D)) != NULL) {
1749 char full_path[PATH_MAX];
1750 struct stat sb;
1751
1752 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
1753 continue;
1754
1755 sprintf(full_path, "%s%c%s", dirname, FIO_OS_PATH_SEPARATOR, dir->d_name);
1756
1757 if (lstat(full_path, &sb) == -1) {
1758 if (errno != ENOENT) {
1759 td_verror(td, errno, "stat");
1760 ret = true;
1761 break;
1762 }
1763 }
1764
1765 if (S_ISREG(sb.st_mode)) {
1766 add_file(td, full_path, 0, 1);
1767 continue;
1768 }
1769 if (!S_ISDIR(sb.st_mode))
1770 continue;
1771
1772 ret = recurse_dir(td, full_path);
1773 if (ret)
1774 break;
1775 }
1776
1777 closedir(D);
1778 return ret;
1779}
1780
1781int add_dir_files(struct thread_data *td, const char *path)
1782{
1783 int ret = recurse_dir(td, path);
1784
1785 if (!ret)
1786 log_info("fio: opendir added %d files\n", td->o.nr_files);
1787
1788 return ret;
1789}
1790
1791void dup_files(struct thread_data *td, struct thread_data *org)
1792{
1793 struct fio_file *f;
1794 unsigned int i;
1795
1796 dprint(FD_FILE, "dup files: %d\n", org->files_index);
1797
1798 if (!org->files)
1799 return;
1800
1801 td->files = malloc(org->files_index * sizeof(f));
1802
1803 if (td->o.file_lock_mode != FILE_LOCK_NONE)
1804 td->file_locks = malloc(org->files_index);
1805
1806 for_each_file(org, f, i) {
1807 struct fio_file *__f;
1808
1809 __f = alloc_new_file(td);
1810
1811 if (f->file_name) {
1812 if (td_ioengine_flagged(td, FIO_NOFILEHASH))
1813 __f->file_name = strdup(f->file_name);
1814 else
1815 __f->file_name = smalloc_strdup(f->file_name);
1816
1817 /* can't handle smalloc failure from here */
1818 assert(__f->file_name);
1819 __f->filetype = f->filetype;
1820 }
1821
1822 if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1823 __f->lock = f->lock;
1824 else if (td->o.file_lock_mode == FILE_LOCK_READWRITE)
1825 __f->rwlock = f->rwlock;
1826
1827 td->files[i] = __f;
1828 }
1829}
1830
1831/*
1832 * Returns the index that matches the filename, or -1 if not there
1833 */
1834int get_fileno(struct thread_data *td, const char *fname)
1835{
1836 struct fio_file *f;
1837 unsigned int i;
1838
1839 for_each_file(td, f, i)
1840 if (!strcmp(f->file_name, fname))
1841 return i;
1842
1843 return -1;
1844}
1845
1846/*
1847 * For log usage, where we add/open/close files automatically
1848 */
1849void free_release_files(struct thread_data *td)
1850{
1851 close_files(td);
1852 td->o.nr_files = 0;
1853 td->o.open_files = 0;
1854 td->files_index = 0;
1855}
1856
1857void fio_file_reset(struct thread_data *td, struct fio_file *f)
1858{
1859 int i;
1860
1861 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1862 f->last_pos[i] = f->file_offset;
1863 f->last_start[i] = -1ULL;
1864 }
1865
1866 if (fio_file_axmap(f))
1867 axmap_reset(f->io_axmap);
1868 else if (fio_file_lfsr(f))
1869 lfsr_reset(&f->lfsr, td->rand_seeds[FIO_RAND_BLOCK_OFF]);
1870}
1871
1872bool fio_files_done(struct thread_data *td)
1873{
1874 struct fio_file *f;
1875 unsigned int i;
1876
1877 for_each_file(td, f, i)
1878 if (!fio_file_done(f))
1879 return false;
1880
1881 return true;
1882}
1883
1884/* free memory used in initialization phase only */
1885void filesetup_mem_free(void)
1886{
1887 free_already_allocated();
1888}
1889
1890/*
1891 * This function is for platforms which support direct I/O but not O_DIRECT.
1892 */
1893int fio_set_directio(struct thread_data *td, struct fio_file *f)
1894{
1895#ifdef FIO_OS_DIRECTIO
1896 int ret = fio_set_odirect(f);
1897
1898 if (ret) {
1899 td_verror(td, ret, "fio_set_directio");
1900#if defined(__sun__)
1901 if (ret == ENOTTY) { /* ENOTTY suggests RAW device or ZFS */
1902 log_err("fio: doing directIO to RAW devices or ZFS not supported\n");
1903 } else {
1904 log_err("fio: the file system does not seem to support direct IO\n");
1905 }
1906#else
1907 log_err("fio: the file system does not seem to support direct IO\n");
1908#endif
1909 return -1;
1910 }
1911
1912 return 0;
1913#else
1914 log_err("fio: direct IO is not supported on this host operating system\n");
1915 return -1;
1916#endif
1917}
fio - Flexible IO Tester