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