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