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