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zipf: cleanup
[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 "os/os.h"
15
16#ifdef FIO_HAVE_LINUX_FALLOCATE
17#include <linux/falloc.h>
18#endif
19
20static int root_warn;
21
22static inline void clear_error(struct thread_data *td)
23{
24 td->error = 0;
25 td->verror[0] = '\0';
26}
27
28/*
29 * Leaves f->fd open on success, caller must close
30 */
31static int extend_file(struct thread_data *td, struct fio_file *f)
32{
33 int r, new_layout = 0, unlink_file = 0, flags;
34 unsigned long long left;
35 unsigned int bs;
36 char *b;
37
38 if (read_only) {
39 log_err("fio: refusing extend of file due to read-only\n");
40 return 0;
41 }
42
43 /*
44 * check if we need to lay the file out complete again. fio
45 * does that for operations involving reads, or for writes
46 * where overwrite is set
47 */
48 if (td_read(td) || (td_write(td) && td->o.overwrite) ||
49 (td_write(td) && td->io_ops->flags & FIO_NOEXTEND))
50 new_layout = 1;
51 if (td_write(td) && !td->o.overwrite)
52 unlink_file = 1;
53
54 if (unlink_file || new_layout) {
55 dprint(FD_FILE, "layout unlink %s\n", f->file_name);
56 if ((unlink(f->file_name) < 0) && (errno != ENOENT)) {
57 td_verror(td, errno, "unlink");
58 return 1;
59 }
60 }
61
62 flags = O_WRONLY | O_CREAT;
63 if (new_layout)
64 flags |= O_TRUNC;
65
66 dprint(FD_FILE, "open file %s, flags %x\n", f->file_name, flags);
67 f->fd = open(f->file_name, flags, 0644);
68 if (f->fd < 0) {
69 td_verror(td, errno, "open");
70 return 1;
71 }
72
73#ifdef FIO_HAVE_FALLOCATE
74 if (!td->o.fill_device) {
75 switch (td->o.fallocate_mode) {
76 case FIO_FALLOCATE_NONE:
77 break;
78 case FIO_FALLOCATE_POSIX:
79 dprint(FD_FILE, "posix_fallocate file %s size %llu\n",
80 f->file_name, f->real_file_size);
81
82 r = posix_fallocate(f->fd, 0, f->real_file_size);
83 if (r > 0) {
84 log_err("fio: posix_fallocate fails: %s\n",
85 strerror(r));
86 }
87 break;
88#ifdef FIO_HAVE_LINUX_FALLOCATE
89 case FIO_FALLOCATE_KEEP_SIZE:
90 dprint(FD_FILE,
91 "fallocate(FALLOC_FL_KEEP_SIZE) "
92 "file %s size %llu\n",
93 f->file_name, f->real_file_size);
94
95 r = fallocate(f->fd, FALLOC_FL_KEEP_SIZE, 0,
96 f->real_file_size);
97 if (r != 0) {
98 td_verror(td, errno, "fallocate");
99 }
100 break;
101#endif /* FIO_HAVE_LINUX_FALLOCATE */
102 default:
103 log_err("fio: unknown fallocate mode: %d\n",
104 td->o.fallocate_mode);
105 assert(0);
106 }
107 }
108#endif /* FIO_HAVE_FALLOCATE */
109
110 if (!new_layout)
111 goto done;
112
113 /*
114 * The size will be -1ULL when fill_device is used, so don't truncate
115 * or fallocate this file, just write it
116 */
117 if (!td->o.fill_device) {
118 dprint(FD_FILE, "truncate file %s, size %llu\n", f->file_name,
119 f->real_file_size);
120 if (ftruncate(f->fd, f->real_file_size) == -1) {
121 td_verror(td, errno, "ftruncate");
122 goto err;
123 }
124 }
125
126 b = malloc(td->o.max_bs[DDIR_WRITE]);
127 memset(b, 0, td->o.max_bs[DDIR_WRITE]);
128
129 left = f->real_file_size;
130 while (left && !td->terminate) {
131 bs = td->o.max_bs[DDIR_WRITE];
132 if (bs > left)
133 bs = left;
134
135 r = write(f->fd, b, bs);
136
137 if (r > 0) {
138 left -= r;
139 continue;
140 } else {
141 if (r < 0) {
142 int __e = errno;
143
144 if (__e == ENOSPC) {
145 if (td->o.fill_device)
146 break;
147 log_info("fio: ENOSPC on laying out "
148 "file, stopping\n");
149 break;
150 }
151 td_verror(td, errno, "write");
152 } else
153 td_verror(td, EIO, "write");
154
155 break;
156 }
157 }
158
159 if (td->terminate) {
160 dprint(FD_FILE, "terminate unlink %s\n", f->file_name);
161 unlink(f->file_name);
162 } else if (td->o.create_fsync) {
163 if (fsync(f->fd) < 0) {
164 td_verror(td, errno, "fsync");
165 goto err;
166 }
167 }
168 if (td->o.fill_device && !td_write(td)) {
169 fio_file_clear_size_known(f);
170 if (td_io_get_file_size(td, f))
171 goto err;
172 if (f->io_size > f->real_file_size)
173 f->io_size = f->real_file_size;
174 }
175
176 free(b);
177done:
178 return 0;
179err:
180 close(f->fd);
181 f->fd = -1;
182 return 1;
183}
184
185static int pre_read_file(struct thread_data *td, struct fio_file *f)
186{
187 int r, did_open = 0, old_runstate;
188 unsigned long long left;
189 unsigned int bs;
190 char *b;
191
192 if (td->io_ops->flags & FIO_PIPEIO)
193 return 0;
194
195 if (!fio_file_open(f)) {
196 if (td->io_ops->open_file(td, f)) {
197 log_err("fio: cannot pre-read, failed to open file\n");
198 return 1;
199 }
200 did_open = 1;
201 }
202
203 old_runstate = td->runstate;
204 td_set_runstate(td, TD_PRE_READING);
205
206 bs = td->o.max_bs[DDIR_READ];
207 b = malloc(bs);
208 memset(b, 0, bs);
209
210 lseek(f->fd, f->file_offset, SEEK_SET);
211 left = f->io_size;
212
213 while (left && !td->terminate) {
214 if (bs > left)
215 bs = left;
216
217 r = read(f->fd, b, bs);
218
219 if (r == (int) bs) {
220 left -= bs;
221 continue;
222 } else {
223 td_verror(td, EIO, "pre_read");
224 break;
225 }
226 }
227
228 td_set_runstate(td, old_runstate);
229
230 if (did_open)
231 td->io_ops->close_file(td, f);
232 free(b);
233 return 0;
234}
235
236static unsigned long long get_rand_file_size(struct thread_data *td)
237{
238 unsigned long long ret, sized;
239 unsigned long r;
240
241 if (td->o.use_os_rand) {
242 r = os_random_long(&td->file_size_state);
243 sized = td->o.file_size_high - td->o.file_size_low;
244 ret = (unsigned long long) ((double) sized * (r / (OS_RAND_MAX + 1.0)));
245 } else {
246 r = __rand(&td->__file_size_state);
247 sized = td->o.file_size_high - td->o.file_size_low;
248 ret = (unsigned long long) ((double) sized * (r / (FRAND_MAX + 1.0)));
249 }
250
251 ret += td->o.file_size_low;
252 ret -= (ret % td->o.rw_min_bs);
253 return ret;
254}
255
256static int file_size(struct thread_data *td, struct fio_file *f)
257{
258 struct stat st;
259
260 if (stat(f->file_name, &st) == -1) {
261 td_verror(td, errno, "fstat");
262 return 1;
263 }
264
265 f->real_file_size = st.st_size;
266 return 0;
267}
268
269static int bdev_size(struct thread_data *td, struct fio_file *f)
270{
271 unsigned long long bytes = 0;
272 int r;
273
274 if (td->io_ops->open_file(td, f)) {
275 log_err("fio: failed opening blockdev %s for size check\n",
276 f->file_name);
277 return 1;
278 }
279
280 r = blockdev_size(f, &bytes);
281 if (r) {
282 td_verror(td, r, "blockdev_size");
283 goto err;
284 }
285
286 if (!bytes) {
287 log_err("%s: zero sized block device?\n", f->file_name);
288 goto err;
289 }
290
291 f->real_file_size = bytes;
292 td->io_ops->close_file(td, f);
293 return 0;
294err:
295 td->io_ops->close_file(td, f);
296 return 1;
297}
298
299static int char_size(struct thread_data *td, struct fio_file *f)
300{
301#ifdef FIO_HAVE_CHARDEV_SIZE
302 unsigned long long bytes = 0;
303 int r;
304
305 if (td->io_ops->open_file(td, f)) {
306 log_err("fio: failed opening blockdev %s for size check\n",
307 f->file_name);
308 return 1;
309 }
310
311 r = chardev_size(f, &bytes);
312 if (r) {
313 td_verror(td, r, "chardev_size");
314 goto err;
315 }
316
317 if (!bytes) {
318 log_err("%s: zero sized char device?\n", f->file_name);
319 goto err;
320 }
321
322 f->real_file_size = bytes;
323 td->io_ops->close_file(td, f);
324 return 0;
325err:
326 td->io_ops->close_file(td, f);
327 return 1;
328#else
329 f->real_file_size = -1ULL;
330 return 0;
331#endif
332}
333
334static int get_file_size(struct thread_data *td, struct fio_file *f)
335{
336 int ret = 0;
337
338 if (fio_file_size_known(f))
339 return 0;
340
341 if (f->filetype == FIO_TYPE_FILE)
342 ret = file_size(td, f);
343 else if (f->filetype == FIO_TYPE_BD)
344 ret = bdev_size(td, f);
345 else if (f->filetype == FIO_TYPE_CHAR)
346 ret = char_size(td, f);
347 else
348 f->real_file_size = -1;
349
350 if (ret)
351 return ret;
352
353 if (f->file_offset > f->real_file_size) {
354 log_err("%s: offset extends end (%llu > %llu)\n", td->o.name,
355 f->file_offset, f->real_file_size);
356 return 1;
357 }
358
359 fio_file_set_size_known(f);
360 return 0;
361}
362
363static int __file_invalidate_cache(struct thread_data *td, struct fio_file *f,
364 unsigned long long off,
365 unsigned long long len)
366{
367 int ret = 0;
368
369 if (len == -1ULL)
370 len = f->io_size;
371 if (off == -1ULL)
372 off = f->file_offset;
373
374 if (len == -1ULL || off == -1ULL)
375 return 0;
376
377 dprint(FD_IO, "invalidate cache %s: %llu/%llu\n", f->file_name, off,
378 len);
379
380 /*
381 * FIXME: add blockdev flushing too
382 */
383 if (f->mmap_ptr) {
384 ret = posix_madvise(f->mmap_ptr, f->mmap_sz, POSIX_MADV_DONTNEED);
385#ifdef FIO_MADV_FREE
386 (void) posix_madvise(f->mmap_ptr, f->mmap_sz, FIO_MADV_FREE);
387#endif
388 } else if (f->filetype == FIO_TYPE_FILE) {
389 ret = posix_fadvise(f->fd, off, len, POSIX_FADV_DONTNEED);
390 } else if (f->filetype == FIO_TYPE_BD) {
391 ret = blockdev_invalidate_cache(f);
392 if (ret < 0 && errno == EACCES && geteuid()) {
393 if (!root_warn) {
394 log_err("fio: only root may flush block "
395 "devices. Cache flush bypassed!\n");
396 root_warn = 1;
397 }
398 ret = 0;
399 }
400 } else if (f->filetype == FIO_TYPE_CHAR || f->filetype == FIO_TYPE_PIPE)
401 ret = 0;
402
403 if (ret < 0) {
404 td_verror(td, errno, "invalidate_cache");
405 return 1;
406 } else if (ret > 0) {
407 td_verror(td, ret, "invalidate_cache");
408 return 1;
409 }
410
411 return ret;
412
413}
414
415int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
416{
417 if (!fio_file_open(f))
418 return 0;
419
420 return __file_invalidate_cache(td, f, -1ULL, -1ULL);
421}
422
423int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
424{
425 int ret = 0;
426
427 dprint(FD_FILE, "fd close %s\n", f->file_name);
428
429 remove_file_hash(f);
430
431 if (close(f->fd) < 0)
432 ret = errno;
433
434 f->fd = -1;
435 return ret;
436}
437
438int file_lookup_open(struct fio_file *f, int flags)
439{
440 struct fio_file *__f;
441 int from_hash;
442
443 __f = lookup_file_hash(f->file_name);
444 if (__f) {
445 dprint(FD_FILE, "found file in hash %s\n", f->file_name);
446 /*
447 * racy, need the __f->lock locked
448 */
449 f->lock = __f->lock;
450 f->lock_owner = __f->lock_owner;
451 f->lock_batch = __f->lock_batch;
452 f->lock_ddir = __f->lock_ddir;
453 from_hash = 1;
454 } else {
455 dprint(FD_FILE, "file not found in hash %s\n", f->file_name);
456 from_hash = 0;
457 }
458
459 f->fd = open(f->file_name, flags, 0600);
460 return from_hash;
461}
462
463int generic_open_file(struct thread_data *td, struct fio_file *f)
464{
465 int is_std = 0;
466 int flags = 0;
467 int from_hash = 0;
468
469 dprint(FD_FILE, "fd open %s\n", f->file_name);
470
471 if (td_trim(td) && f->filetype != FIO_TYPE_BD) {
472 log_err("fio: trim only applies to block device\n");
473 return 1;
474 }
475
476 if (!strcmp(f->file_name, "-")) {
477 if (td_rw(td)) {
478 log_err("fio: can't read/write to stdin/out\n");
479 return 1;
480 }
481 is_std = 1;
482
483 /*
484 * move output logging to stderr, if we are writing to stdout
485 */
486 if (td_write(td))
487 f_out = stderr;
488 }
489
490 if (td_trim(td))
491 goto skip_flags;
492 if (td->o.odirect)
493 flags |= OS_O_DIRECT;
494 if (td->o.sync_io)
495 flags |= O_SYNC;
496 if (td->o.create_on_open)
497 flags |= O_CREAT;
498skip_flags:
499 if (f->filetype != FIO_TYPE_FILE)
500 flags |= FIO_O_NOATIME;
501
502open_again:
503 if (td_write(td)) {
504 if (!read_only)
505 flags |= O_RDWR;
506
507 if (f->filetype == FIO_TYPE_FILE)
508 flags |= O_CREAT;
509
510 if (is_std)
511 f->fd = dup(STDOUT_FILENO);
512 else
513 from_hash = file_lookup_open(f, flags);
514 } else if (td_read(td)) {
515 if (f->filetype == FIO_TYPE_CHAR && !read_only)
516 flags |= O_RDWR;
517 else
518 flags |= O_RDONLY;
519
520 if (is_std)
521 f->fd = dup(STDIN_FILENO);
522 else
523 from_hash = file_lookup_open(f, flags);
524 } else { //td trim
525 flags |= O_RDWR;
526 from_hash = file_lookup_open(f, flags);
527 }
528
529 if (f->fd == -1) {
530 char buf[FIO_VERROR_SIZE];
531 int __e = errno;
532
533 if (__e == EPERM && (flags & FIO_O_NOATIME)) {
534 flags &= ~FIO_O_NOATIME;
535 goto open_again;
536 }
537
538 snprintf(buf, sizeof(buf) - 1, "open(%s)", f->file_name);
539
540 if (__e == EINVAL && (flags & OS_O_DIRECT)) {
541 log_err("fio: looks like your file system does not " \
542 "support direct=1/buffered=0\n");
543 }
544
545 td_verror(td, __e, buf);
546 }
547
548 if (!from_hash && f->fd != -1) {
549 if (add_file_hash(f)) {
550 int fio_unused ret;
551
552 /*
553 * OK to ignore, we haven't done anything with it
554 */
555 ret = generic_close_file(td, f);
556 goto open_again;
557 }
558 }
559
560 return 0;
561}
562
563int generic_get_file_size(struct thread_data *td, struct fio_file *f)
564{
565 return get_file_size(td, f);
566}
567
568/*
569 * open/close all files, so that ->real_file_size gets set
570 */
571static int get_file_sizes(struct thread_data *td)
572{
573 struct fio_file *f;
574 unsigned int i;
575 int err = 0;
576
577 for_each_file(td, f, i) {
578 dprint(FD_FILE, "get file size for %p/%d/%p\n", f, i,
579 f->file_name);
580
581 if (td_io_get_file_size(td, f)) {
582 if (td->error != ENOENT) {
583 log_err("%s\n", td->verror);
584 err = 1;
585 }
586 clear_error(td);
587 }
588
589 if (f->real_file_size == -1ULL && td->o.size)
590 f->real_file_size = td->o.size / td->o.nr_files;
591 }
592
593 return err;
594}
595
596struct fio_mount {
597 struct flist_head list;
598 const char *base;
599 char __base[256];
600 unsigned int key;
601};
602
603/*
604 * Get free number of bytes for each file on each unique mount.
605 */
606static unsigned long long get_fs_free_counts(struct thread_data *td)
607{
608 struct flist_head *n, *tmp;
609 unsigned long long ret = 0;
610 struct fio_mount *fm;
611 FLIST_HEAD(list);
612 struct fio_file *f;
613 unsigned int i;
614
615 for_each_file(td, f, i) {
616 struct stat sb;
617 char buf[256];
618
619 if (f->filetype == FIO_TYPE_BD || f->filetype == FIO_TYPE_CHAR) {
620 if (f->real_file_size != -1ULL)
621 ret += f->real_file_size;
622 continue;
623 } else if (f->filetype != FIO_TYPE_FILE)
624 continue;
625
626 strcpy(buf, f->file_name);
627
628 if (stat(buf, &sb) < 0) {
629 if (errno != ENOENT)
630 break;
631 strcpy(buf, ".");
632 if (stat(buf, &sb) < 0)
633 break;
634 }
635
636 fm = NULL;
637 flist_for_each(n, &list) {
638 fm = flist_entry(n, struct fio_mount, list);
639 if (fm->key == sb.st_dev)
640 break;
641
642 fm = NULL;
643 }
644
645 if (fm)
646 continue;
647
648 fm = malloc(sizeof(*fm));
649 strcpy(fm->__base, buf);
650 fm->base = basename(fm->__base);
651 fm->key = sb.st_dev;
652 flist_add(&fm->list, &list);
653 }
654
655 flist_for_each_safe(n, tmp, &list) {
656 unsigned long long sz;
657
658 fm = flist_entry(n, struct fio_mount, list);
659 flist_del(&fm->list);
660
661 sz = get_fs_size(fm->base);
662 if (sz && sz != -1ULL)
663 ret += sz;
664
665 free(fm);
666 }
667
668 return ret;
669}
670
671unsigned long long get_start_offset(struct thread_data *td)
672{
673 return td->o.start_offset +
674 (td->thread_number - 1) * td->o.offset_increment;
675}
676
677/*
678 * Open the files and setup files sizes, creating files if necessary.
679 */
680int setup_files(struct thread_data *td)
681{
682 unsigned long long total_size, extend_size;
683 struct fio_file *f;
684 unsigned int i;
685 int err = 0, need_extend;
686
687 dprint(FD_FILE, "setup files\n");
688
689 if (td->o.read_iolog_file)
690 goto done;
691
692 /*
693 * if ioengine defines a setup() method, it's responsible for
694 * opening the files and setting f->real_file_size to indicate
695 * the valid range for that file.
696 */
697 if (td->io_ops->setup)
698 err = td->io_ops->setup(td);
699 else
700 err = get_file_sizes(td);
701
702 if (err)
703 return err;
704
705 /*
706 * check sizes. if the files/devices do not exist and the size
707 * isn't passed to fio, abort.
708 */
709 total_size = 0;
710 for_each_file(td, f, i) {
711 if (f->real_file_size == -1ULL)
712 total_size = -1ULL;
713 else
714 total_size += f->real_file_size;
715 }
716
717 if (td->o.fill_device)
718 td->fill_device_size = get_fs_free_counts(td);
719
720 /*
721 * device/file sizes are zero and no size given, punt
722 */
723 if ((!total_size || total_size == -1ULL) && !td->o.size &&
724 !(td->io_ops->flags & FIO_NOIO) && !td->o.fill_device) {
725 log_err("%s: you need to specify size=\n", td->o.name);
726 td_verror(td, EINVAL, "total_file_size");
727 return 1;
728 }
729
730 /*
731 * now file sizes are known, so we can set ->io_size. if size= is
732 * not given, ->io_size is just equal to ->real_file_size. if size
733 * is given, ->io_size is size / nr_files.
734 */
735 extend_size = total_size = 0;
736 need_extend = 0;
737 for_each_file(td, f, i) {
738 f->file_offset = get_start_offset(td);
739
740 if (!td->o.file_size_low) {
741 /*
742 * no file size range given, file size is equal to
743 * total size divided by number of files. if that is
744 * zero, set it to the real file size.
745 */
746 f->io_size = td->o.size / td->o.nr_files;
747 if (!f->io_size)
748 f->io_size = f->real_file_size - f->file_offset;
749 } else if (f->real_file_size < td->o.file_size_low ||
750 f->real_file_size > td->o.file_size_high) {
751 if (f->file_offset > td->o.file_size_low)
752 goto err_offset;
753 /*
754 * file size given. if it's fixed, use that. if it's a
755 * range, generate a random size in-between.
756 */
757 if (td->o.file_size_low == td->o.file_size_high) {
758 f->io_size = td->o.file_size_low
759 - f->file_offset;
760 } else {
761 f->io_size = get_rand_file_size(td)
762 - f->file_offset;
763 }
764 } else
765 f->io_size = f->real_file_size - f->file_offset;
766
767 if (f->io_size == -1ULL)
768 total_size = -1ULL;
769 else {
770 if (td->o.size_percent)
771 f->io_size = (f->io_size * td->o.size_percent) / 100;
772 total_size += f->io_size;
773 }
774
775 if (f->filetype == FIO_TYPE_FILE &&
776 (f->io_size + f->file_offset) > f->real_file_size &&
777 !(td->io_ops->flags & FIO_DISKLESSIO)) {
778 if (!td->o.create_on_open) {
779 need_extend++;
780 extend_size += (f->io_size + f->file_offset);
781 } else
782 f->real_file_size = f->io_size + f->file_offset;
783 fio_file_set_extend(f);
784 }
785 }
786
787 if (!td->o.size || td->o.size > total_size)
788 td->o.size = total_size;
789
790 /*
791 * See if we need to extend some files
792 */
793 if (need_extend) {
794 temp_stall_ts = 1;
795 if (output_format == FIO_OUTPUT_NORMAL)
796 log_info("%s: Laying out IO file(s) (%u file(s) /"
797 " %lluMB)\n", td->o.name, need_extend,
798 extend_size >> 20);
799
800 for_each_file(td, f, i) {
801 unsigned long long old_len = -1ULL, extend_len = -1ULL;
802
803 if (!fio_file_extend(f))
804 continue;
805
806 assert(f->filetype == FIO_TYPE_FILE);
807 fio_file_clear_extend(f);
808 if (!td->o.fill_device) {
809 old_len = f->real_file_size;
810 extend_len = f->io_size + f->file_offset -
811 old_len;
812 }
813 f->real_file_size = (f->io_size + f->file_offset);
814 err = extend_file(td, f);
815 if (err)
816 break;
817
818 err = __file_invalidate_cache(td, f, old_len,
819 extend_len);
820 close(f->fd);
821 f->fd = -1;
822 if (err)
823 break;
824 }
825 temp_stall_ts = 0;
826 }
827
828 if (err)
829 return err;
830
831 if (!td->o.zone_size)
832 td->o.zone_size = td->o.size;
833
834 /*
835 * iolog already set the total io size, if we read back
836 * stored entries.
837 */
838 if (!td->o.read_iolog_file)
839 td->total_io_size = td->o.size * td->o.loops;
840
841done:
842 if (td->o.create_only)
843 td->done = 1;
844
845 return 0;
846err_offset:
847 log_err("%s: you need to specify valid offset=\n", td->o.name);
848 return 1;
849}
850
851int pre_read_files(struct thread_data *td)
852{
853 struct fio_file *f;
854 unsigned int i;
855
856 dprint(FD_FILE, "pre_read files\n");
857
858 for_each_file(td, f, i) {
859 pre_read_file(td, f);
860 }
861
862 return 1;
863}
864
865static int __init_rand_distribution(struct thread_data *td, struct fio_file *f)
866{
867 unsigned int range_size;
868 unsigned long nranges;
869
870 range_size = min(td->o.min_bs[DDIR_READ], td->o.min_bs[DDIR_WRITE]);
871
872 nranges = (f->real_file_size + range_size - 1) / range_size;
873
874 if (td->o.random_distribution == FIO_RAND_DIST_ZIPF)
875 zipf_init(&f->zipf, nranges, td->o.zipf_theta);
876 else
877 pareto_init(&f->zipf, nranges, td->o.pareto_h);
878
879 return 1;
880}
881
882static int init_rand_distribution(struct thread_data *td)
883{
884 struct fio_file *f;
885 unsigned int i;
886 int state;
887
888 if (td->o.random_distribution == FIO_RAND_DIST_RANDOM)
889 return 0;
890
891 state = td->runstate;
892 td_set_runstate(td, TD_SETTING_UP);
893 for_each_file(td, f, i)
894 __init_rand_distribution(td, f);
895 td_set_runstate(td, state);
896
897 return 1;
898}
899
900int init_random_map(struct thread_data *td)
901{
902 unsigned long long blocks, num_maps;
903 struct fio_file *f;
904 unsigned int i;
905
906 if (init_rand_distribution(td))
907 return 0;
908 if (td->o.norandommap || !td_random(td))
909 return 0;
910
911 for_each_file(td, f, i) {
912 blocks = (f->real_file_size + td->o.rw_min_bs - 1) /
913 (unsigned long long) td->o.rw_min_bs;
914 num_maps = (blocks + BLOCKS_PER_MAP - 1) /
915 (unsigned long long) BLOCKS_PER_MAP;
916 if (num_maps == (unsigned long) num_maps) {
917 f->file_map = smalloc(num_maps * sizeof(unsigned long));
918 if (f->file_map) {
919 f->num_maps = num_maps;
920 continue;
921 }
922 } else
923 f->file_map = NULL;
924
925 if (!td->o.softrandommap) {
926 log_err("fio: failed allocating random map. If running"
927 " a large number of jobs, try the 'norandommap'"
928 " option or set 'softrandommap'. Or give"
929 " a larger --alloc-size to fio.\n");
930 return 1;
931 }
932
933 log_info("fio: file %s failed allocating random map. Running "
934 "job without.\n", f->file_name);
935 f->num_maps = 0;
936 }
937
938 return 0;
939}
940
941void close_files(struct thread_data *td)
942{
943 struct fio_file *f;
944 unsigned int i;
945
946 for_each_file(td, f, i) {
947 if (fio_file_open(f))
948 td_io_close_file(td, f);
949 }
950}
951
952void close_and_free_files(struct thread_data *td)
953{
954 struct fio_file *f;
955 unsigned int i;
956
957 dprint(FD_FILE, "close files\n");
958
959 for_each_file(td, f, i) {
960 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
961 dprint(FD_FILE, "free unlink %s\n", f->file_name);
962 unlink(f->file_name);
963 }
964
965 if (fio_file_open(f))
966 td_io_close_file(td, f);
967
968 remove_file_hash(f);
969
970 sfree(f->file_name);
971 f->file_name = NULL;
972 sfree(f->file_map);
973 f->file_map = NULL;
974 sfree(f);
975 }
976
977 td->o.filename = NULL;
978 free(td->files);
979 td->files_index = 0;
980 td->files = NULL;
981 td->o.nr_files = 0;
982}
983
984static void get_file_type(struct fio_file *f)
985{
986 struct stat sb;
987
988 if (!strcmp(f->file_name, "-"))
989 f->filetype = FIO_TYPE_PIPE;
990 else
991 f->filetype = FIO_TYPE_FILE;
992
993 /* \\.\ is the device namespace in Windows, where every file is
994 * a block device */
995 if (strncmp(f->file_name, "\\\\.\\", 4) == 0)
996 f->filetype = FIO_TYPE_BD;
997
998 if (!stat(f->file_name, &sb)) {
999 if (S_ISBLK(sb.st_mode))
1000 f->filetype = FIO_TYPE_BD;
1001 else if (S_ISCHR(sb.st_mode))
1002 f->filetype = FIO_TYPE_CHAR;
1003 else if (S_ISFIFO(sb.st_mode))
1004 f->filetype = FIO_TYPE_PIPE;
1005 }
1006}
1007
1008int add_file(struct thread_data *td, const char *fname)
1009{
1010 int cur_files = td->files_index;
1011 char file_name[PATH_MAX];
1012 struct fio_file *f;
1013 int len = 0;
1014
1015 dprint(FD_FILE, "add file %s\n", fname);
1016
1017 f = smalloc(sizeof(*f));
1018 if (!f) {
1019 log_err("fio: smalloc OOM\n");
1020 assert(0);
1021 }
1022
1023 f->fd = -1;
1024 fio_file_reset(f);
1025
1026 if (td->files_size <= td->files_index) {
1027 int new_size = td->o.nr_files + 1;
1028
1029 dprint(FD_FILE, "resize file array to %d files\n", new_size);
1030
1031 td->files = realloc(td->files, new_size * sizeof(f));
1032 td->files_size = new_size;
1033 }
1034 td->files[cur_files] = f;
1035 f->fileno = cur_files;
1036
1037 /*
1038 * init function, io engine may not be loaded yet
1039 */
1040 if (td->io_ops && (td->io_ops->flags & FIO_DISKLESSIO))
1041 f->real_file_size = -1ULL;
1042
1043 if (td->o.directory)
1044 len = sprintf(file_name, "%s/", td->o.directory);
1045
1046 sprintf(file_name + len, "%s", fname);
1047 f->file_name = smalloc_strdup(file_name);
1048 if (!f->file_name) {
1049 log_err("fio: smalloc OOM\n");
1050 assert(0);
1051 }
1052
1053 get_file_type(f);
1054
1055 switch (td->o.file_lock_mode) {
1056 case FILE_LOCK_NONE:
1057 break;
1058 case FILE_LOCK_READWRITE:
1059 f->lock = fio_mutex_rw_init();
1060 break;
1061 case FILE_LOCK_EXCLUSIVE:
1062 f->lock = fio_mutex_init(FIO_MUTEX_UNLOCKED);
1063 break;
1064 default:
1065 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
1066 assert(0);
1067 }
1068
1069 td->files_index++;
1070 if (f->filetype == FIO_TYPE_FILE)
1071 td->nr_normal_files++;
1072
1073 dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name,
1074 cur_files);
1075
1076 return cur_files;
1077}
1078
1079int add_file_exclusive(struct thread_data *td, const char *fname)
1080{
1081 struct fio_file *f;
1082 unsigned int i;
1083
1084 for_each_file(td, f, i) {
1085 if (!strcmp(f->file_name, fname))
1086 return i;
1087 }
1088
1089 return add_file(td, fname);
1090}
1091
1092void get_file(struct fio_file *f)
1093{
1094 dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
1095 assert(fio_file_open(f));
1096 f->references++;
1097}
1098
1099int put_file(struct thread_data *td, struct fio_file *f)
1100{
1101 int f_ret = 0, ret = 0;
1102
1103 dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
1104
1105 if (!fio_file_open(f)) {
1106 assert(f->fd == -1);
1107 return 0;
1108 }
1109
1110 assert(f->references);
1111 if (--f->references)
1112 return 0;
1113
1114 if (should_fsync(td) && td->o.fsync_on_close)
1115 f_ret = fsync(f->fd);
1116
1117 if (td->io_ops->close_file)
1118 ret = td->io_ops->close_file(td, f);
1119
1120 if (!ret)
1121 ret = f_ret;
1122
1123 td->nr_open_files--;
1124 fio_file_clear_open(f);
1125 assert(f->fd == -1);
1126 return ret;
1127}
1128
1129void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
1130{
1131 if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1132 return;
1133
1134 if (f->lock_owner == td && f->lock_batch--)
1135 return;
1136
1137 if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
1138 if (ddir == DDIR_READ)
1139 fio_mutex_down_read(f->lock);
1140 else
1141 fio_mutex_down_write(f->lock);
1142 } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1143 fio_mutex_down(f->lock);
1144
1145 f->lock_owner = td;
1146 f->lock_batch = td->o.lockfile_batch;
1147 f->lock_ddir = ddir;
1148}
1149
1150void unlock_file(struct thread_data *td, struct fio_file *f)
1151{
1152 if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1153 return;
1154 if (f->lock_batch)
1155 return;
1156
1157 if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
1158 const int is_read = f->lock_ddir == DDIR_READ;
1159 int val = fio_mutex_getval(f->lock);
1160
1161 if ((is_read && val == 1) || (!is_read && val == -1))
1162 f->lock_owner = NULL;
1163
1164 if (is_read)
1165 fio_mutex_up_read(f->lock);
1166 else
1167 fio_mutex_up_write(f->lock);
1168 } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE) {
1169 int val = fio_mutex_getval(f->lock);
1170
1171 if (val == 0)
1172 f->lock_owner = NULL;
1173
1174 fio_mutex_up(f->lock);
1175 }
1176}
1177
1178void unlock_file_all(struct thread_data *td, struct fio_file *f)
1179{
1180 if (f->lock_owner != td)
1181 return;
1182
1183 f->lock_batch = 0;
1184 unlock_file(td, f);
1185}
1186
1187static int recurse_dir(struct thread_data *td, const char *dirname)
1188{
1189 struct dirent *dir;
1190 int ret = 0;
1191 DIR *D;
1192
1193 D = opendir(dirname);
1194 if (!D) {
1195 char buf[FIO_VERROR_SIZE];
1196
1197 snprintf(buf, FIO_VERROR_SIZE - 1, "opendir(%s)", dirname);
1198 td_verror(td, errno, buf);
1199 return 1;
1200 }
1201
1202 while ((dir = readdir(D)) != NULL) {
1203 char full_path[PATH_MAX];
1204 struct stat sb;
1205
1206 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
1207 continue;
1208
1209 sprintf(full_path, "%s%s%s", dirname, FIO_OS_PATH_SEPARATOR, dir->d_name);
1210
1211 if (lstat(full_path, &sb) == -1) {
1212 if (errno != ENOENT) {
1213 td_verror(td, errno, "stat");
1214 return 1;
1215 }
1216 }
1217
1218 if (S_ISREG(sb.st_mode)) {
1219 add_file(td, full_path);
1220 td->o.nr_files++;
1221 continue;
1222 }
1223 if (!S_ISDIR(sb.st_mode))
1224 continue;
1225
1226 ret = recurse_dir(td, full_path);
1227 if (ret)
1228 break;
1229 }
1230
1231 closedir(D);
1232 return ret;
1233}
1234
1235int add_dir_files(struct thread_data *td, const char *path)
1236{
1237 int ret = recurse_dir(td, path);
1238
1239 if (!ret)
1240 log_info("fio: opendir added %d files\n", td->o.nr_files);
1241
1242 return ret;
1243}
1244
1245void dup_files(struct thread_data *td, struct thread_data *org)
1246{
1247 struct fio_file *f;
1248 unsigned int i;
1249
1250 dprint(FD_FILE, "dup files: %d\n", org->files_index);
1251
1252 if (!org->files)
1253 return;
1254
1255 td->files = malloc(org->files_index * sizeof(f));
1256
1257 for_each_file(org, f, i) {
1258 struct fio_file *__f;
1259
1260 __f = smalloc(sizeof(*__f));
1261 if (!__f) {
1262 log_err("fio: smalloc OOM\n");
1263 assert(0);
1264 }
1265 __f->fd = -1;
1266 fio_file_reset(__f);
1267
1268 if (f->file_name) {
1269 __f->file_name = smalloc_strdup(f->file_name);
1270 if (!__f->file_name) {
1271 log_err("fio: smalloc OOM\n");
1272 assert(0);
1273 }
1274
1275 __f->filetype = f->filetype;
1276 }
1277
1278 td->files[i] = __f;
1279 }
1280}
1281
1282/*
1283 * Returns the index that matches the filename, or -1 if not there
1284 */
1285int get_fileno(struct thread_data *td, const char *fname)
1286{
1287 struct fio_file *f;
1288 unsigned int i;
1289
1290 for_each_file(td, f, i)
1291 if (!strcmp(f->file_name, fname))
1292 return i;
1293
1294 return -1;
1295}
1296
1297/*
1298 * For log usage, where we add/open/close files automatically
1299 */
1300void free_release_files(struct thread_data *td)
1301{
1302 close_files(td);
1303 td->files_index = 0;
1304 td->nr_normal_files = 0;
1305}
fio - Flexible IO Tester