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