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Fixup -Wshadow warnings
[fio.git] / filesetup.c
... / ...
CommitLineData
1#include <unistd.h>
2#include <fcntl.h>
3#include <string.h>
4#include <assert.h>
5#include <dirent.h>
6#include <libgen.h>
7#include <sys/stat.h>
8#include <sys/mman.h>
9#include <sys/types.h>
10
11#include "fio.h"
12#include "smalloc.h"
13#include "filehash.h"
14#include "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
267static unsigned 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 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 else if (f->filetype == FIO_TYPE_FILE)
414 ret = posix_fadvise(f->fd, off, len, POSIX_FADV_DONTNEED);
415 else if (f->filetype == FIO_TYPE_BD) {
416 int retry_count = 0;
417
418 ret = blockdev_invalidate_cache(f);
419 while (ret < 0 && errno == EAGAIN && retry_count++ < 25) {
420 /*
421 * Linux multipath devices reject ioctl while
422 * the maps are being updated. That window can
423 * last tens of milliseconds; we'll try up to
424 * a quarter of a second.
425 */
426 usleep(10000);
427 ret = blockdev_invalidate_cache(f);
428 }
429 if (ret < 0 && errno == EACCES && geteuid()) {
430 if (!root_warn) {
431 log_err("fio: only root may flush block "
432 "devices. Cache flush bypassed!\n");
433 root_warn = 1;
434 }
435 ret = 0;
436 }
437 } else if (f->filetype == FIO_TYPE_CHAR || f->filetype == FIO_TYPE_PIPE)
438 ret = 0;
439
440 /*
441 * Cache flushing isn't a fatal condition, and we know it will
442 * happen on some platforms where we don't have the proper
443 * function to flush eg block device caches. So just warn and
444 * continue on our way.
445 */
446 if (ret) {
447 log_info("fio: cache invalidation of %s failed: %s\n", f->file_name, strerror(errno));
448 ret = 0;
449 }
450
451 return 0;
452
453}
454
455int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
456{
457 if (!fio_file_open(f))
458 return 0;
459
460 return __file_invalidate_cache(td, f, -1ULL, -1ULL);
461}
462
463int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
464{
465 int ret = 0;
466
467 dprint(FD_FILE, "fd close %s\n", f->file_name);
468
469 remove_file_hash(f);
470
471 if (close(f->fd) < 0)
472 ret = errno;
473
474 f->fd = -1;
475
476 if (f->shadow_fd != -1) {
477 close(f->shadow_fd);
478 f->shadow_fd = -1;
479 }
480
481 f->engine_data = 0;
482 return ret;
483}
484
485int file_lookup_open(struct fio_file *f, int flags)
486{
487 struct fio_file *__f;
488 int from_hash;
489
490 __f = lookup_file_hash(f->file_name);
491 if (__f) {
492 dprint(FD_FILE, "found file in hash %s\n", f->file_name);
493 /*
494 * racy, need the __f->lock locked
495 */
496 f->lock = __f->lock;
497 from_hash = 1;
498 } else {
499 dprint(FD_FILE, "file not found in hash %s\n", f->file_name);
500 from_hash = 0;
501 }
502
503#ifdef WIN32
504 flags |= _O_BINARY;
505#endif
506
507 f->fd = open(f->file_name, flags, 0600);
508 return from_hash;
509}
510
511static int file_close_shadow_fds(struct thread_data *td)
512{
513 struct fio_file *f;
514 int num_closed = 0;
515 unsigned int i;
516
517 for_each_file(td, f, i) {
518 if (f->shadow_fd == -1)
519 continue;
520
521 close(f->shadow_fd);
522 f->shadow_fd = -1;
523 num_closed++;
524 }
525
526 return num_closed;
527}
528
529int generic_open_file(struct thread_data *td, struct fio_file *f)
530{
531 int is_std = 0;
532 int flags = 0;
533 int from_hash = 0;
534
535 dprint(FD_FILE, "fd open %s\n", f->file_name);
536
537 if (!strcmp(f->file_name, "-")) {
538 if (td_rw(td)) {
539 log_err("fio: can't read/write to stdin/out\n");
540 return 1;
541 }
542 is_std = 1;
543
544 /*
545 * move output logging to stderr, if we are writing to stdout
546 */
547 if (td_write(td))
548 f_out = stderr;
549 }
550
551 if (td_trim(td))
552 goto skip_flags;
553 if (td->o.odirect)
554 flags |= OS_O_DIRECT;
555 if (td->o.oatomic) {
556 if (!FIO_O_ATOMIC) {
557 td_verror(td, EINVAL, "OS does not support atomic IO");
558 return 1;
559 }
560 flags |= OS_O_DIRECT | FIO_O_ATOMIC;
561 }
562 if (td->o.sync_io)
563 flags |= O_SYNC;
564 if (td->o.create_on_open && td->o.allow_create)
565 flags |= O_CREAT;
566skip_flags:
567 if (f->filetype != FIO_TYPE_FILE)
568 flags |= FIO_O_NOATIME;
569
570open_again:
571 if (td_write(td)) {
572 if (!read_only)
573 flags |= O_RDWR;
574
575 if (f->filetype == FIO_TYPE_FILE && td->o.allow_create)
576 flags |= O_CREAT;
577
578 if (is_std)
579 f->fd = dup(STDOUT_FILENO);
580 else
581 from_hash = file_lookup_open(f, flags);
582 } else if (td_read(td)) {
583 if (f->filetype == FIO_TYPE_CHAR && !read_only)
584 flags |= O_RDWR;
585 else
586 flags |= O_RDONLY;
587
588 if (is_std)
589 f->fd = dup(STDIN_FILENO);
590 else
591 from_hash = file_lookup_open(f, flags);
592 } else { //td trim
593 flags |= O_RDWR;
594 from_hash = file_lookup_open(f, flags);
595 }
596
597 if (f->fd == -1) {
598 char buf[FIO_VERROR_SIZE];
599 int __e = errno;
600
601 if (__e == EPERM && (flags & FIO_O_NOATIME)) {
602 flags &= ~FIO_O_NOATIME;
603 goto open_again;
604 }
605 if (__e == EMFILE && file_close_shadow_fds(td))
606 goto open_again;
607
608 snprintf(buf, sizeof(buf), "open(%s)", f->file_name);
609
610 if (__e == EINVAL && (flags & OS_O_DIRECT)) {
611 log_err("fio: looks like your file system does not " \
612 "support direct=1/buffered=0\n");
613 }
614
615 td_verror(td, __e, buf);
616 return 1;
617 }
618
619 if (!from_hash && f->fd != -1) {
620 if (add_file_hash(f)) {
621 int fio_unused ret;
622
623 /*
624 * Stash away descriptor for later close. This is to
625 * work-around a "feature" on Linux, where a close of
626 * an fd that has been opened for write will trigger
627 * udev to call blkid to check partitions, fs id, etc.
628 * That pollutes the device cache, which can slow down
629 * unbuffered accesses.
630 */
631 if (f->shadow_fd == -1)
632 f->shadow_fd = f->fd;
633 else {
634 /*
635 * OK to ignore, we haven't done anything
636 * with it
637 */
638 ret = generic_close_file(td, f);
639 }
640 goto open_again;
641 }
642 }
643
644 return 0;
645}
646
647int generic_get_file_size(struct thread_data *td, struct fio_file *f)
648{
649 return get_file_size(td, f);
650}
651
652/*
653 * open/close all files, so that ->real_file_size gets set
654 */
655static int get_file_sizes(struct thread_data *td)
656{
657 struct fio_file *f;
658 unsigned int i;
659 int err = 0;
660
661 for_each_file(td, f, i) {
662 dprint(FD_FILE, "get file size for %p/%d/%p\n", f, i,
663 f->file_name);
664
665 if (td_io_get_file_size(td, f)) {
666 if (td->error != ENOENT) {
667 log_err("%s\n", td->verror);
668 err = 1;
669 break;
670 }
671 clear_error(td);
672 }
673
674 if (f->real_file_size == -1ULL && td->o.size)
675 f->real_file_size = td->o.size / td->o.nr_files;
676 }
677
678 return err;
679}
680
681struct fio_mount {
682 struct flist_head list;
683 const char *base;
684 char __base[256];
685 unsigned int key;
686};
687
688/*
689 * Get free number of bytes for each file on each unique mount.
690 */
691static unsigned long long get_fs_free_counts(struct thread_data *td)
692{
693 struct flist_head *n, *tmp;
694 unsigned long long ret = 0;
695 struct fio_mount *fm;
696 FLIST_HEAD(list);
697 struct fio_file *f;
698 unsigned int i;
699
700 for_each_file(td, f, i) {
701 struct stat sb;
702 char buf[256];
703
704 if (f->filetype == FIO_TYPE_BD || f->filetype == FIO_TYPE_CHAR) {
705 if (f->real_file_size != -1ULL)
706 ret += f->real_file_size;
707 continue;
708 } else if (f->filetype != FIO_TYPE_FILE)
709 continue;
710
711 buf[255] = '\0';
712 strncpy(buf, f->file_name, 255);
713
714 if (stat(buf, &sb) < 0) {
715 if (errno != ENOENT)
716 break;
717 strcpy(buf, ".");
718 if (stat(buf, &sb) < 0)
719 break;
720 }
721
722 fm = NULL;
723 flist_for_each(n, &list) {
724 fm = flist_entry(n, struct fio_mount, list);
725 if (fm->key == sb.st_dev)
726 break;
727
728 fm = NULL;
729 }
730
731 if (fm)
732 continue;
733
734 fm = calloc(1, sizeof(*fm));
735 strncpy(fm->__base, buf, sizeof(fm->__base) - 1);
736 fm->base = basename(fm->__base);
737 fm->key = sb.st_dev;
738 flist_add(&fm->list, &list);
739 }
740
741 flist_for_each_safe(n, tmp, &list) {
742 unsigned long long sz;
743
744 fm = flist_entry(n, struct fio_mount, list);
745 flist_del(&fm->list);
746
747 sz = get_fs_free_size(fm->base);
748 if (sz && sz != -1ULL)
749 ret += sz;
750
751 free(fm);
752 }
753
754 return ret;
755}
756
757uint64_t get_start_offset(struct thread_data *td, struct fio_file *f)
758{
759 struct thread_options *o = &td->o;
760
761 if (o->file_append && f->filetype == FIO_TYPE_FILE)
762 return f->real_file_size;
763
764 return td->o.start_offset +
765 td->subjob_number * td->o.offset_increment;
766}
767
768/*
769 * Open the files and setup files sizes, creating files if necessary.
770 */
771int setup_files(struct thread_data *td)
772{
773 unsigned long long total_size, extend_size;
774 struct thread_options *o = &td->o;
775 struct fio_file *f;
776 unsigned int i, nr_fs_extra = 0;
777 int err = 0, need_extend;
778 int old_state;
779 const unsigned int bs = td_min_bs(td);
780 uint64_t fs = 0;
781
782 dprint(FD_FILE, "setup files\n");
783
784 old_state = td_bump_runstate(td, TD_SETTING_UP);
785
786 if (o->read_iolog_file)
787 goto done;
788
789 /*
790 * if ioengine defines a setup() method, it's responsible for
791 * opening the files and setting f->real_file_size to indicate
792 * the valid range for that file.
793 */
794 if (td->io_ops->setup)
795 err = td->io_ops->setup(td);
796 else
797 err = get_file_sizes(td);
798
799 if (err)
800 goto err_out;
801
802 /*
803 * check sizes. if the files/devices do not exist and the size
804 * isn't passed to fio, abort.
805 */
806 total_size = 0;
807 for_each_file(td, f, i) {
808 if (f->real_file_size == -1ULL)
809 total_size = -1ULL;
810 else
811 total_size += f->real_file_size;
812 }
813
814 if (o->fill_device)
815 td->fill_device_size = get_fs_free_counts(td);
816
817 /*
818 * device/file sizes are zero and no size given, punt
819 */
820 if ((!total_size || total_size == -1ULL) && !o->size &&
821 !(td->io_ops->flags & FIO_NOIO) && !o->fill_device &&
822 !(o->nr_files && (o->file_size_low || o->file_size_high))) {
823 log_err("%s: you need to specify size=\n", o->name);
824 td_verror(td, EINVAL, "total_file_size");
825 goto err_out;
826 }
827
828 /*
829 * Calculate per-file size and potential extra size for the
830 * first files, if needed.
831 */
832 if (!o->file_size_low && o->nr_files) {
833 uint64_t all_fs;
834
835 fs = o->size / o->nr_files;
836 all_fs = fs * o->nr_files;
837
838 if (all_fs < o->size)
839 nr_fs_extra = (o->size - all_fs) / bs;
840 }
841
842 /*
843 * now file sizes are known, so we can set ->io_size. if size= is
844 * not given, ->io_size is just equal to ->real_file_size. if size
845 * is given, ->io_size is size / nr_files.
846 */
847 extend_size = total_size = 0;
848 need_extend = 0;
849 for_each_file(td, f, i) {
850 f->file_offset = get_start_offset(td, f);
851
852 if (!o->file_size_low) {
853 /*
854 * no file size range given, file size is equal to
855 * total size divided by number of files. If that is
856 * zero, set it to the real file size. If the size
857 * doesn't divide nicely with the min blocksize,
858 * make the first files bigger.
859 */
860 f->io_size = fs;
861 if (nr_fs_extra) {
862 nr_fs_extra--;
863 f->io_size += bs;
864 }
865
866 if (!f->io_size)
867 f->io_size = f->real_file_size - f->file_offset;
868 } else if (f->real_file_size < o->file_size_low ||
869 f->real_file_size > o->file_size_high) {
870 if (f->file_offset > o->file_size_low)
871 goto err_offset;
872 /*
873 * file size given. if it's fixed, use that. if it's a
874 * range, generate a random size in-between.
875 */
876 if (o->file_size_low == o->file_size_high)
877 f->io_size = o->file_size_low - f->file_offset;
878 else {
879 f->io_size = get_rand_file_size(td)
880 - f->file_offset;
881 }
882 } else
883 f->io_size = f->real_file_size - f->file_offset;
884
885 if (f->io_size == -1ULL)
886 total_size = -1ULL;
887 else {
888 if (o->size_percent)
889 f->io_size = (f->io_size * o->size_percent) / 100;
890 total_size += f->io_size;
891 }
892
893 if (f->filetype == FIO_TYPE_FILE &&
894 (f->io_size + f->file_offset) > f->real_file_size &&
895 !(td->io_ops->flags & FIO_DISKLESSIO)) {
896 if (!o->create_on_open) {
897 need_extend++;
898 extend_size += (f->io_size + f->file_offset);
899 } else
900 f->real_file_size = f->io_size + f->file_offset;
901 fio_file_set_extend(f);
902 }
903 }
904
905 if (td->o.block_error_hist) {
906 int len;
907
908 assert(td->o.nr_files == 1); /* checked in fixup_options */
909 f = td->files[0];
910 len = f->io_size / td->o.bs[DDIR_TRIM];
911 if (len > MAX_NR_BLOCK_INFOS || len <= 0) {
912 log_err("fio: cannot calculate block histogram with "
913 "%d trim blocks, maximum %d\n",
914 len, MAX_NR_BLOCK_INFOS);
915 td_verror(td, EINVAL, "block_error_hist");
916 goto err_out;
917 }
918
919 td->ts.nr_block_infos = len;
920 for (i = 0; i < len; i++)
921 td->ts.block_infos[i] =
922 BLOCK_INFO(0, BLOCK_STATE_UNINIT);
923 } else
924 td->ts.nr_block_infos = 0;
925
926 if (!o->size || (total_size && o->size > total_size))
927 o->size = total_size;
928
929 if (o->size < td_min_bs(td)) {
930 log_err("fio: blocksize too large for data set\n");
931 goto err_out;
932 }
933
934 /*
935 * See if we need to extend some files
936 */
937 if (need_extend) {
938 temp_stall_ts = 1;
939 if (output_format & FIO_OUTPUT_NORMAL)
940 log_info("%s: Laying out IO file(s) (%u file(s) /"
941 " %lluMB)\n", o->name, need_extend,
942 extend_size >> 20);
943
944 for_each_file(td, f, i) {
945 unsigned long long old_len = -1ULL, extend_len = -1ULL;
946
947 if (!fio_file_extend(f))
948 continue;
949
950 assert(f->filetype == FIO_TYPE_FILE);
951 fio_file_clear_extend(f);
952 if (!o->fill_device) {
953 old_len = f->real_file_size;
954 extend_len = f->io_size + f->file_offset -
955 old_len;
956 }
957 f->real_file_size = (f->io_size + f->file_offset);
958 err = extend_file(td, f);
959 if (err)
960 break;
961
962 err = __file_invalidate_cache(td, f, old_len,
963 extend_len);
964
965 /*
966 * Shut up static checker
967 */
968 if (f->fd != -1)
969 close(f->fd);
970
971 f->fd = -1;
972 if (err)
973 break;
974 }
975 temp_stall_ts = 0;
976 }
977
978 if (err)
979 goto err_out;
980
981 if (!o->zone_size)
982 o->zone_size = o->size;
983
984 /*
985 * iolog already set the total io size, if we read back
986 * stored entries.
987 */
988 if (!o->read_iolog_file) {
989 if (o->io_limit)
990 td->total_io_size = o->io_limit * o->loops;
991 else
992 td->total_io_size = o->size * o->loops;
993 }
994
995done:
996 if (o->create_only)
997 td->done = 1;
998
999 td_restore_runstate(td, old_state);
1000 return 0;
1001err_offset:
1002 log_err("%s: you need to specify valid offset=\n", o->name);
1003err_out:
1004 td_restore_runstate(td, old_state);
1005 return 1;
1006}
1007
1008int pre_read_files(struct thread_data *td)
1009{
1010 struct fio_file *f;
1011 unsigned int i;
1012
1013 dprint(FD_FILE, "pre_read files\n");
1014
1015 for_each_file(td, f, i) {
1016 pre_read_file(td, f);
1017 }
1018
1019 return 1;
1020}
1021
1022static int __init_rand_distribution(struct thread_data *td, struct fio_file *f)
1023{
1024 unsigned int range_size, seed;
1025 unsigned long nranges;
1026 uint64_t fsize;
1027
1028 range_size = min(td->o.min_bs[DDIR_READ], td->o.min_bs[DDIR_WRITE]);
1029 fsize = min(f->real_file_size, f->io_size);
1030
1031 nranges = (fsize + range_size - 1) / range_size;
1032
1033 seed = jhash(f->file_name, strlen(f->file_name), 0) * td->thread_number;
1034 if (!td->o.rand_repeatable)
1035 seed = td->rand_seeds[4];
1036
1037 if (td->o.random_distribution == FIO_RAND_DIST_ZIPF)
1038 zipf_init(&f->zipf, nranges, td->o.zipf_theta.u.f, seed);
1039 else if (td->o.random_distribution == FIO_RAND_DIST_PARETO)
1040 pareto_init(&f->zipf, nranges, td->o.pareto_h.u.f, seed);
1041 else if (td->o.random_distribution == FIO_RAND_DIST_GAUSS)
1042 gauss_init(&f->gauss, nranges, td->o.gauss_dev.u.f, seed);
1043
1044 return 1;
1045}
1046
1047static int init_rand_distribution(struct thread_data *td)
1048{
1049 struct fio_file *f;
1050 unsigned int i;
1051 int state;
1052
1053 if (td->o.random_distribution == FIO_RAND_DIST_RANDOM)
1054 return 0;
1055
1056 state = td_bump_runstate(td, TD_SETTING_UP);
1057
1058 for_each_file(td, f, i)
1059 __init_rand_distribution(td, f);
1060
1061 td_restore_runstate(td, state);
1062
1063 return 1;
1064}
1065
1066/*
1067 * Check if the number of blocks exceeds the randomness capability of
1068 * the selected generator. Tausworthe is 32-bit, the others are fullly
1069 * 64-bit capable.
1070 */
1071static int check_rand_gen_limits(struct thread_data *td, struct fio_file *f,
1072 uint64_t blocks)
1073{
1074 if (blocks <= FRAND32_MAX)
1075 return 0;
1076 if (td->o.random_generator != FIO_RAND_GEN_TAUSWORTHE)
1077 return 0;
1078
1079 /*
1080 * If the user hasn't specified a random generator, switch
1081 * to tausworthe64 with informational warning. If the user did
1082 * specify one, just warn.
1083 */
1084 log_info("fio: file %s exceeds 32-bit tausworthe random generator.\n",
1085 f->file_name);
1086
1087 if (!fio_option_is_set(&td->o, random_generator)) {
1088 log_info("fio: Switching to tausworthe64. Use the "
1089 "random_generator= option to get rid of this "
1090 " warning.\n");
1091 td->o.random_generator = FIO_RAND_GEN_TAUSWORTHE64;
1092 return 0;
1093 }
1094
1095 /*
1096 * Just make this information to avoid breaking scripts.
1097 */
1098 log_info("fio: Use the random_generator= option to switch to lfsr or "
1099 "tausworthe64.\n");
1100 return 0;
1101}
1102
1103int init_random_map(struct thread_data *td)
1104{
1105 unsigned long long blocks;
1106 struct fio_file *f;
1107 unsigned int i;
1108
1109 if (init_rand_distribution(td))
1110 return 0;
1111 if (!td_random(td))
1112 return 0;
1113
1114 for_each_file(td, f, i) {
1115 uint64_t fsize = min(f->real_file_size, f->io_size);
1116
1117 blocks = fsize / (unsigned long long) td->o.rw_min_bs;
1118
1119 if (check_rand_gen_limits(td, f, blocks))
1120 return 1;
1121
1122 if (td->o.random_generator == FIO_RAND_GEN_LFSR) {
1123 unsigned long seed;
1124
1125 seed = td->rand_seeds[FIO_RAND_BLOCK_OFF];
1126
1127 if (!lfsr_init(&f->lfsr, blocks, seed, 0)) {
1128 fio_file_set_lfsr(f);
1129 continue;
1130 }
1131 } else if (!td->o.norandommap) {
1132 f->io_axmap = axmap_new(blocks);
1133 if (f->io_axmap) {
1134 fio_file_set_axmap(f);
1135 continue;
1136 }
1137 } else if (td->o.norandommap)
1138 continue;
1139
1140 if (!td->o.softrandommap) {
1141 log_err("fio: failed allocating random map. If running"
1142 " a large number of jobs, try the 'norandommap'"
1143 " option or set 'softrandommap'. Or give"
1144 " a larger --alloc-size to fio.\n");
1145 return 1;
1146 }
1147
1148 log_info("fio: file %s failed allocating random map. Running "
1149 "job without.\n", f->file_name);
1150 }
1151
1152 return 0;
1153}
1154
1155void close_files(struct thread_data *td)
1156{
1157 struct fio_file *f;
1158 unsigned int i;
1159
1160 for_each_file(td, f, i) {
1161 if (fio_file_open(f))
1162 td_io_close_file(td, f);
1163 }
1164}
1165
1166void close_and_free_files(struct thread_data *td)
1167{
1168 struct fio_file *f;
1169 unsigned int i;
1170
1171 dprint(FD_FILE, "close files\n");
1172
1173 for_each_file(td, f, i) {
1174 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
1175 dprint(FD_FILE, "free unlink %s\n", f->file_name);
1176 td_io_unlink_file(td, f);
1177 }
1178
1179 if (fio_file_open(f))
1180 td_io_close_file(td, f);
1181
1182 remove_file_hash(f);
1183
1184 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
1185 dprint(FD_FILE, "free unlink %s\n", f->file_name);
1186 td_io_unlink_file(td, f);
1187 }
1188
1189 sfree(f->file_name);
1190 f->file_name = NULL;
1191 if (fio_file_axmap(f)) {
1192 axmap_free(f->io_axmap);
1193 f->io_axmap = NULL;
1194 }
1195 sfree(f);
1196 }
1197
1198 td->o.filename = NULL;
1199 free(td->files);
1200 free(td->file_locks);
1201 td->files_index = 0;
1202 td->files = NULL;
1203 td->file_locks = NULL;
1204 td->o.file_lock_mode = FILE_LOCK_NONE;
1205 td->o.nr_files = 0;
1206}
1207
1208static void get_file_type(struct fio_file *f)
1209{
1210 struct stat sb;
1211
1212 if (!strcmp(f->file_name, "-"))
1213 f->filetype = FIO_TYPE_PIPE;
1214 else
1215 f->filetype = FIO_TYPE_FILE;
1216
1217 /* \\.\ is the device namespace in Windows, where every file is
1218 * a block device */
1219 if (strncmp(f->file_name, "\\\\.\\", 4) == 0)
1220 f->filetype = FIO_TYPE_BD;
1221
1222 if (!stat(f->file_name, &sb)) {
1223 if (S_ISBLK(sb.st_mode))
1224 f->filetype = FIO_TYPE_BD;
1225 else if (S_ISCHR(sb.st_mode))
1226 f->filetype = FIO_TYPE_CHAR;
1227 else if (S_ISFIFO(sb.st_mode))
1228 f->filetype = FIO_TYPE_PIPE;
1229 }
1230}
1231
1232static int __is_already_allocated(const char *fname)
1233{
1234 struct flist_head *entry;
1235 char *filename;
1236
1237 if (flist_empty(&filename_list))
1238 return 0;
1239
1240 flist_for_each(entry, &filename_list) {
1241 filename = flist_entry(entry, struct file_name, list)->filename;
1242
1243 if (strcmp(filename, fname) == 0)
1244 return 1;
1245 }
1246
1247 return 0;
1248}
1249
1250static int is_already_allocated(const char *fname)
1251{
1252 int ret;
1253
1254 fio_file_hash_lock();
1255 ret = __is_already_allocated(fname);
1256 fio_file_hash_unlock();
1257 return ret;
1258}
1259
1260static void set_already_allocated(const char *fname)
1261{
1262 struct file_name *fn;
1263
1264 fn = malloc(sizeof(struct file_name));
1265 fn->filename = strdup(fname);
1266
1267 fio_file_hash_lock();
1268 if (!__is_already_allocated(fname)) {
1269 flist_add_tail(&fn->list, &filename_list);
1270 fn = NULL;
1271 }
1272 fio_file_hash_unlock();
1273
1274 if (fn) {
1275 free(fn->filename);
1276 free(fn);
1277 }
1278}
1279
1280
1281static void free_already_allocated(void)
1282{
1283 struct flist_head *entry, *tmp;
1284 struct file_name *fn;
1285
1286 if (flist_empty(&filename_list))
1287 return;
1288
1289 fio_file_hash_lock();
1290 flist_for_each_safe(entry, tmp, &filename_list) {
1291 fn = flist_entry(entry, struct file_name, list);
1292 free(fn->filename);
1293 flist_del(&fn->list);
1294 free(fn);
1295 }
1296
1297 fio_file_hash_unlock();
1298}
1299
1300static struct fio_file *alloc_new_file(struct thread_data *td)
1301{
1302 struct fio_file *f;
1303
1304 f = smalloc(sizeof(*f));
1305 if (!f) {
1306 log_err("fio: smalloc OOM\n");
1307 assert(0);
1308 return NULL;
1309 }
1310
1311 f->fd = -1;
1312 f->shadow_fd = -1;
1313 fio_file_reset(td, f);
1314 return f;
1315}
1316
1317int add_file(struct thread_data *td, const char *fname, int numjob, int inc)
1318{
1319 int cur_files = td->files_index;
1320 char file_name[PATH_MAX];
1321 struct fio_file *f;
1322 int len = 0;
1323
1324 dprint(FD_FILE, "add file %s\n", fname);
1325
1326 if (td->o.directory)
1327 len = set_name_idx(file_name, PATH_MAX, td->o.directory, numjob);
1328
1329 sprintf(file_name + len, "%s", fname);
1330
1331 /* clean cloned siblings using existing files */
1332 if (numjob && is_already_allocated(file_name))
1333 return 0;
1334
1335 f = alloc_new_file(td);
1336
1337 if (td->files_size <= td->files_index) {
1338 unsigned int new_size = td->o.nr_files + 1;
1339
1340 dprint(FD_FILE, "resize file array to %d files\n", new_size);
1341
1342 td->files = realloc(td->files, new_size * sizeof(f));
1343 if (td->files == NULL) {
1344 log_err("fio: realloc OOM\n");
1345 assert(0);
1346 }
1347 if (td->o.file_lock_mode != FILE_LOCK_NONE) {
1348 td->file_locks = realloc(td->file_locks, new_size);
1349 if (!td->file_locks) {
1350 log_err("fio: realloc OOM\n");
1351 assert(0);
1352 }
1353 td->file_locks[cur_files] = FILE_LOCK_NONE;
1354 }
1355 td->files_size = new_size;
1356 }
1357 td->files[cur_files] = f;
1358 f->fileno = cur_files;
1359
1360 /*
1361 * init function, io engine may not be loaded yet
1362 */
1363 if (td->io_ops && (td->io_ops->flags & FIO_DISKLESSIO))
1364 f->real_file_size = -1ULL;
1365
1366 f->file_name = smalloc_strdup(file_name);
1367 if (!f->file_name) {
1368 log_err("fio: smalloc OOM\n");
1369 assert(0);
1370 }
1371
1372 get_file_type(f);
1373
1374 switch (td->o.file_lock_mode) {
1375 case FILE_LOCK_NONE:
1376 break;
1377 case FILE_LOCK_READWRITE:
1378 f->rwlock = fio_rwlock_init();
1379 break;
1380 case FILE_LOCK_EXCLUSIVE:
1381 f->lock = fio_mutex_init(FIO_MUTEX_UNLOCKED);
1382 break;
1383 default:
1384 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
1385 assert(0);
1386 }
1387
1388 td->files_index++;
1389 if (f->filetype == FIO_TYPE_FILE)
1390 td->nr_normal_files++;
1391
1392 set_already_allocated(file_name);
1393
1394 if (inc)
1395 td->o.nr_files++;
1396
1397 dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name,
1398 cur_files);
1399
1400 return cur_files;
1401}
1402
1403int add_file_exclusive(struct thread_data *td, const char *fname)
1404{
1405 struct fio_file *f;
1406 unsigned int i;
1407
1408 for_each_file(td, f, i) {
1409 if (!strcmp(f->file_name, fname))
1410 return i;
1411 }
1412
1413 return add_file(td, fname, 0, 1);
1414}
1415
1416void get_file(struct fio_file *f)
1417{
1418 dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
1419 assert(fio_file_open(f));
1420 f->references++;
1421}
1422
1423int put_file(struct thread_data *td, struct fio_file *f)
1424{
1425 int f_ret = 0, ret = 0;
1426
1427 dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
1428
1429 if (!fio_file_open(f)) {
1430 assert(f->fd == -1);
1431 return 0;
1432 }
1433
1434 assert(f->references);
1435 if (--f->references)
1436 return 0;
1437
1438 if (should_fsync(td) && td->o.fsync_on_close) {
1439 f_ret = fsync(f->fd);
1440 if (f_ret < 0)
1441 f_ret = errno;
1442 }
1443
1444 if (td->io_ops->close_file)
1445 ret = td->io_ops->close_file(td, f);
1446
1447 if (!ret)
1448 ret = f_ret;
1449
1450 td->nr_open_files--;
1451 fio_file_clear_open(f);
1452 assert(f->fd == -1);
1453 return ret;
1454}
1455
1456void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
1457{
1458 if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1459 return;
1460
1461 if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
1462 if (ddir == DDIR_READ)
1463 fio_rwlock_read(f->rwlock);
1464 else
1465 fio_rwlock_write(f->rwlock);
1466 } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1467 fio_mutex_down(f->lock);
1468
1469 td->file_locks[f->fileno] = td->o.file_lock_mode;
1470}
1471
1472void unlock_file(struct thread_data *td, struct fio_file *f)
1473{
1474 if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1475 return;
1476
1477 if (td->o.file_lock_mode == FILE_LOCK_READWRITE)
1478 fio_rwlock_unlock(f->rwlock);
1479 else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1480 fio_mutex_up(f->lock);
1481
1482 td->file_locks[f->fileno] = FILE_LOCK_NONE;
1483}
1484
1485void unlock_file_all(struct thread_data *td, struct fio_file *f)
1486{
1487 if (td->o.file_lock_mode == FILE_LOCK_NONE || !td->file_locks)
1488 return;
1489 if (td->file_locks[f->fileno] != FILE_LOCK_NONE)
1490 unlock_file(td, f);
1491}
1492
1493static int recurse_dir(struct thread_data *td, const char *dirname)
1494{
1495 struct dirent *dir;
1496 int ret = 0;
1497 DIR *D;
1498
1499 D = opendir(dirname);
1500 if (!D) {
1501 char buf[FIO_VERROR_SIZE];
1502
1503 snprintf(buf, FIO_VERROR_SIZE, "opendir(%s)", dirname);
1504 td_verror(td, errno, buf);
1505 return 1;
1506 }
1507
1508 while ((dir = readdir(D)) != NULL) {
1509 char full_path[PATH_MAX];
1510 struct stat sb;
1511
1512 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
1513 continue;
1514
1515 sprintf(full_path, "%s%s%s", dirname, FIO_OS_PATH_SEPARATOR, dir->d_name);
1516
1517 if (lstat(full_path, &sb) == -1) {
1518 if (errno != ENOENT) {
1519 td_verror(td, errno, "stat");
1520 ret = 1;
1521 break;
1522 }
1523 }
1524
1525 if (S_ISREG(sb.st_mode)) {
1526 add_file(td, full_path, 0, 1);
1527 continue;
1528 }
1529 if (!S_ISDIR(sb.st_mode))
1530 continue;
1531
1532 ret = recurse_dir(td, full_path);
1533 if (ret)
1534 break;
1535 }
1536
1537 closedir(D);
1538 return ret;
1539}
1540
1541int add_dir_files(struct thread_data *td, const char *path)
1542{
1543 int ret = recurse_dir(td, path);
1544
1545 if (!ret)
1546 log_info("fio: opendir added %d files\n", td->o.nr_files);
1547
1548 return ret;
1549}
1550
1551void dup_files(struct thread_data *td, struct thread_data *org)
1552{
1553 struct fio_file *f;
1554 unsigned int i;
1555
1556 dprint(FD_FILE, "dup files: %d\n", org->files_index);
1557
1558 if (!org->files)
1559 return;
1560
1561 td->files = malloc(org->files_index * sizeof(f));
1562
1563 if (td->o.file_lock_mode != FILE_LOCK_NONE)
1564 td->file_locks = malloc(org->files_index);
1565
1566 for_each_file(org, f, i) {
1567 struct fio_file *__f;
1568
1569 __f = alloc_new_file(td);
1570
1571 if (f->file_name) {
1572 __f->file_name = smalloc_strdup(f->file_name);
1573 if (!__f->file_name) {
1574 log_err("fio: smalloc OOM\n");
1575 assert(0);
1576 }
1577
1578 __f->filetype = f->filetype;
1579 }
1580
1581 if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1582 __f->lock = f->lock;
1583 else if (td->o.file_lock_mode == FILE_LOCK_READWRITE)
1584 __f->rwlock = f->rwlock;
1585
1586 td->files[i] = __f;
1587 }
1588}
1589
1590/*
1591 * Returns the index that matches the filename, or -1 if not there
1592 */
1593int get_fileno(struct thread_data *td, const char *fname)
1594{
1595 struct fio_file *f;
1596 unsigned int i;
1597
1598 for_each_file(td, f, i)
1599 if (!strcmp(f->file_name, fname))
1600 return i;
1601
1602 return -1;
1603}
1604
1605/*
1606 * For log usage, where we add/open/close files automatically
1607 */
1608void free_release_files(struct thread_data *td)
1609{
1610 close_files(td);
1611 td->o.nr_files = 0;
1612 td->o.open_files = 0;
1613 td->files_index = 0;
1614 td->nr_normal_files = 0;
1615}
1616
1617void fio_file_reset(struct thread_data *td, struct fio_file *f)
1618{
1619 int i;
1620
1621 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1622 f->last_pos[i] = f->file_offset;
1623 f->last_start[i] = -1ULL;
1624 }
1625
1626 if (fio_file_axmap(f))
1627 axmap_reset(f->io_axmap);
1628 else if (fio_file_lfsr(f))
1629 lfsr_reset(&f->lfsr, td->rand_seeds[FIO_RAND_BLOCK_OFF]);
1630}
1631
1632int fio_files_done(struct thread_data *td)
1633{
1634 struct fio_file *f;
1635 unsigned int i;
1636
1637 for_each_file(td, f, i)
1638 if (!fio_file_done(f))
1639 return 0;
1640
1641 return 1;
1642}
1643
1644/* free memory used in initialization phase only */
1645void filesetup_mem_free(void)
1646{
1647 free_already_allocated();
1648}
fio - Flexible IO Tester