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