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
23 static int root_warn;
24
25 static FLIST_HEAD(filename_list);
26
clear_error(struct thread_data * td)27 static 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 */
extend_file(struct thread_data * td,struct fio_file * f)36 static int extend_file(struct thread_data *td, struct fio_file *f)
37 {
38 int r, new_layout = 0, unlink_file = 0, flags;
39 unsigned long long left;
40 unsigned int bs;
41 char *b = NULL;
42
43 if (read_only) {
44 log_err("fio: refusing extend of file due to read-only\n");
45 return 0;
46 }
47
48 /*
49 * check if we need to lay the file out complete again. fio
50 * does that for operations involving reads, or for writes
51 * where overwrite is set
52 */
53 if (td_read(td) ||
54 (td_write(td) && td->o.overwrite && !td->o.file_append) ||
55 (td_write(td) && td->io_ops->flags & FIO_NOEXTEND))
56 new_layout = 1;
57 if (td_write(td) && !td->o.overwrite && !td->o.file_append)
58 unlink_file = 1;
59
60 if (unlink_file || new_layout) {
61 dprint(FD_FILE, "layout unlink %s\n", f->file_name);
62 if ((unlink(f->file_name) < 0) && (errno != ENOENT)) {
63 td_verror(td, errno, "unlink");
64 return 1;
65 }
66 }
67
68 flags = O_WRONLY | O_CREAT;
69 if (new_layout)
70 flags |= O_TRUNC;
71
72 #ifdef WIN32
73 flags |= _O_BINARY;
74 #endif
75
76 dprint(FD_FILE, "open file %s, flags %x\n", f->file_name, flags);
77 f->fd = open(f->file_name, flags, 0644);
78 if (f->fd < 0) {
79 td_verror(td, errno, "open");
80 return 1;
81 }
82
83 #ifdef CONFIG_POSIX_FALLOCATE
84 if (!td->o.fill_device) {
85 switch (td->o.fallocate_mode) {
86 case FIO_FALLOCATE_NONE:
87 break;
88 case FIO_FALLOCATE_POSIX:
89 dprint(FD_FILE, "posix_fallocate file %s size %llu\n",
90 f->file_name,
91 (unsigned long long) f->real_file_size);
92
93 r = posix_fallocate(f->fd, 0, f->real_file_size);
94 if (r > 0) {
95 log_err("fio: posix_fallocate fails: %s\n",
96 strerror(r));
97 }
98 break;
99 #ifdef CONFIG_LINUX_FALLOCATE
100 case FIO_FALLOCATE_KEEP_SIZE:
101 dprint(FD_FILE,
102 "fallocate(FALLOC_FL_KEEP_SIZE) "
103 "file %s size %llu\n", f->file_name,
104 (unsigned long long) f->real_file_size);
105
106 r = fallocate(f->fd, FALLOC_FL_KEEP_SIZE, 0,
107 f->real_file_size);
108 if (r != 0)
109 td_verror(td, errno, "fallocate");
110
111 break;
112 #endif /* CONFIG_LINUX_FALLOCATE */
113 default:
114 log_err("fio: unknown fallocate mode: %d\n",
115 td->o.fallocate_mode);
116 assert(0);
117 }
118 }
119 #endif /* CONFIG_POSIX_FALLOCATE */
120
121 if (!new_layout)
122 goto done;
123
124 /*
125 * The size will be -1ULL when fill_device is used, so don't truncate
126 * or fallocate this file, just write it
127 */
128 if (!td->o.fill_device) {
129 dprint(FD_FILE, "truncate file %s, size %llu\n", f->file_name,
130 (unsigned long long) f->real_file_size);
131 if (ftruncate(f->fd, f->real_file_size) == -1) {
132 if (errno != EFBIG) {
133 td_verror(td, errno, "ftruncate");
134 goto err;
135 }
136 }
137 }
138
139 b = malloc(td->o.max_bs[DDIR_WRITE]);
140
141 left = f->real_file_size;
142 while (left && !td->terminate) {
143 bs = td->o.max_bs[DDIR_WRITE];
144 if (bs > left)
145 bs = left;
146
147 fill_io_buffer(td, b, bs, bs);
148
149 r = write(f->fd, b, bs);
150
151 if (r > 0) {
152 left -= r;
153 continue;
154 } else {
155 if (r < 0) {
156 int __e = errno;
157
158 if (__e == ENOSPC) {
159 if (td->o.fill_device)
160 break;
161 log_info("fio: ENOSPC on laying out "
162 "file, stopping\n");
163 break;
164 }
165 td_verror(td, errno, "write");
166 } else
167 td_verror(td, EIO, "write");
168
169 break;
170 }
171 }
172
173 if (td->terminate) {
174 dprint(FD_FILE, "terminate unlink %s\n", f->file_name);
175 unlink(f->file_name);
176 } else if (td->o.create_fsync) {
177 if (fsync(f->fd) < 0) {
178 td_verror(td, errno, "fsync");
179 goto err;
180 }
181 }
182 if (td->o.fill_device && !td_write(td)) {
183 fio_file_clear_size_known(f);
184 if (td_io_get_file_size(td, f))
185 goto err;
186 if (f->io_size > f->real_file_size)
187 f->io_size = f->real_file_size;
188 }
189
190 free(b);
191 done:
192 return 0;
193 err:
194 close(f->fd);
195 f->fd = -1;
196 if (b)
197 free(b);
198 return 1;
199 }
200
pre_read_file(struct thread_data * td,struct fio_file * f)201 static int pre_read_file(struct thread_data *td, struct fio_file *f)
202 {
203 int ret = 0, r, did_open = 0, old_runstate;
204 unsigned long long left;
205 unsigned int bs;
206 char *b;
207
208 if (td->io_ops->flags & FIO_PIPEIO)
209 return 0;
210
211 if (!fio_file_open(f)) {
212 if (td->io_ops->open_file(td, f)) {
213 log_err("fio: cannot pre-read, failed to open file\n");
214 return 1;
215 }
216 did_open = 1;
217 }
218
219 old_runstate = td_bump_runstate(td, TD_PRE_READING);
220
221 bs = td->o.max_bs[DDIR_READ];
222 b = malloc(bs);
223 memset(b, 0, bs);
224
225 if (lseek(f->fd, f->file_offset, SEEK_SET) < 0) {
226 td_verror(td, errno, "lseek");
227 log_err("fio: failed to lseek pre-read file\n");
228 ret = 1;
229 goto error;
230 }
231
232 left = f->io_size;
233
234 while (left && !td->terminate) {
235 if (bs > left)
236 bs = left;
237
238 r = read(f->fd, b, bs);
239
240 if (r == (int) bs) {
241 left -= bs;
242 continue;
243 } else {
244 td_verror(td, EIO, "pre_read");
245 break;
246 }
247 }
248
249 error:
250 td_restore_runstate(td, old_runstate);
251
252 if (did_open)
253 td->io_ops->close_file(td, f);
254
255 free(b);
256 return ret;
257 }
258
get_rand_file_size(struct thread_data * td)259 static unsigned long long get_rand_file_size(struct thread_data *td)
260 {
261 unsigned long long ret, sized;
262 unsigned long r;
263
264 if (td->o.use_os_rand) {
265 r = os_random_long(&td->file_size_state);
266 sized = td->o.file_size_high - td->o.file_size_low;
267 ret = (unsigned long long) ((double) sized * (r / (OS_RAND_MAX + 1.0)));
268 } else {
269 r = __rand(&td->__file_size_state);
270 sized = td->o.file_size_high - td->o.file_size_low;
271 ret = (unsigned long long) ((double) sized * (r / (FRAND_MAX + 1.0)));
272 }
273
274 ret += td->o.file_size_low;
275 ret -= (ret % td->o.rw_min_bs);
276 return ret;
277 }
278
file_size(struct thread_data * td,struct fio_file * f)279 static int file_size(struct thread_data *td, struct fio_file *f)
280 {
281 struct stat st;
282
283 if (stat(f->file_name, &st) == -1) {
284 td_verror(td, errno, "fstat");
285 return 1;
286 }
287
288 f->real_file_size = st.st_size;
289 return 0;
290 }
291
bdev_size(struct thread_data * td,struct fio_file * f)292 static int bdev_size(struct thread_data *td, struct fio_file *f)
293 {
294 unsigned long long bytes = 0;
295 int r;
296
297 if (td->io_ops->open_file(td, f)) {
298 log_err("fio: failed opening blockdev %s for size check\n",
299 f->file_name);
300 return 1;
301 }
302
303 r = blockdev_size(f, &bytes);
304 if (r) {
305 td_verror(td, r, "blockdev_size");
306 goto err;
307 }
308
309 if (!bytes) {
310 log_err("%s: zero sized block device?\n", f->file_name);
311 goto err;
312 }
313
314 f->real_file_size = bytes;
315 td->io_ops->close_file(td, f);
316 return 0;
317 err:
318 td->io_ops->close_file(td, f);
319 return 1;
320 }
321
char_size(struct thread_data * td,struct fio_file * f)322 static int char_size(struct thread_data *td, struct fio_file *f)
323 {
324 #ifdef FIO_HAVE_CHARDEV_SIZE
325 unsigned long long bytes = 0;
326 int r;
327
328 if (td->io_ops->open_file(td, f)) {
329 log_err("fio: failed opening blockdev %s for size check\n",
330 f->file_name);
331 return 1;
332 }
333
334 r = chardev_size(f, &bytes);
335 if (r) {
336 td_verror(td, r, "chardev_size");
337 goto err;
338 }
339
340 if (!bytes) {
341 log_err("%s: zero sized char device?\n", f->file_name);
342 goto err;
343 }
344
345 f->real_file_size = bytes;
346 td->io_ops->close_file(td, f);
347 return 0;
348 err:
349 td->io_ops->close_file(td, f);
350 return 1;
351 #else
352 f->real_file_size = -1ULL;
353 return 0;
354 #endif
355 }
356
get_file_size(struct thread_data * td,struct fio_file * f)357 static int get_file_size(struct thread_data *td, struct fio_file *f)
358 {
359 int ret = 0;
360
361 if (fio_file_size_known(f))
362 return 0;
363
364 if (f->filetype == FIO_TYPE_FILE)
365 ret = file_size(td, f);
366 else if (f->filetype == FIO_TYPE_BD)
367 ret = bdev_size(td, f);
368 else if (f->filetype == FIO_TYPE_CHAR)
369 ret = char_size(td, f);
370 else
371 f->real_file_size = -1;
372
373 if (ret)
374 return ret;
375
376 if (f->file_offset > f->real_file_size) {
377 log_err("%s: offset extends end (%llu > %llu)\n", td->o.name,
378 (unsigned long long) f->file_offset,
379 (unsigned long long) f->real_file_size);
380 return 1;
381 }
382
383 fio_file_set_size_known(f);
384 return 0;
385 }
386
__file_invalidate_cache(struct thread_data * td,struct fio_file * f,unsigned long long off,unsigned long long len)387 static int __file_invalidate_cache(struct thread_data *td, struct fio_file *f,
388 unsigned long long off,
389 unsigned long long len)
390 {
391 int ret = 0;
392
393 if (len == -1ULL)
394 len = f->io_size;
395 if (off == -1ULL)
396 off = f->file_offset;
397
398 if (len == -1ULL || off == -1ULL)
399 return 0;
400
401 dprint(FD_IO, "invalidate cache %s: %llu/%llu\n", f->file_name, off,
402 len);
403
404 if (f->mmap_ptr) {
405 ret = posix_madvise(f->mmap_ptr, f->mmap_sz, POSIX_MADV_DONTNEED);
406 #ifdef FIO_MADV_FREE
407 if (f->filetype == FIO_TYPE_BD)
408 (void) posix_madvise(f->mmap_ptr, f->mmap_sz, FIO_MADV_FREE);
409 #endif
410 } else if (f->filetype == FIO_TYPE_FILE) {
411 ret = posix_fadvise(f->fd, off, len, POSIX_FADV_DONTNEED);
412 } else if (f->filetype == FIO_TYPE_BD) {
413 ret = blockdev_invalidate_cache(f);
414 if (ret < 0 && errno == EACCES && geteuid()) {
415 if (!root_warn) {
416 log_err("fio: only root may flush block "
417 "devices. Cache flush bypassed!\n");
418 root_warn = 1;
419 }
420 ret = 0;
421 }
422 } else if (f->filetype == FIO_TYPE_CHAR || f->filetype == FIO_TYPE_PIPE)
423 ret = 0;
424
425 /*
426 * Cache flushing isn't a fatal condition, and we know it will
427 * happen on some platforms where we don't have the proper
428 * function to flush eg block device caches. So just warn and
429 * continue on our way.
430 */
431 if (ret) {
432 log_info("fio: cache invalidation of %s failed: %s\n", f->file_name, strerror(errno));
433 ret = 0;
434 }
435
436 return 0;
437
438 }
439
file_invalidate_cache(struct thread_data * td,struct fio_file * f)440 int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
441 {
442 if (!fio_file_open(f))
443 return 0;
444
445 return __file_invalidate_cache(td, f, -1ULL, -1ULL);
446 }
447
generic_close_file(struct thread_data fio_unused * td,struct fio_file * f)448 int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
449 {
450 int ret = 0;
451
452 dprint(FD_FILE, "fd close %s\n", f->file_name);
453
454 remove_file_hash(f);
455
456 if (close(f->fd) < 0)
457 ret = errno;
458
459 f->fd = -1;
460
461 if (f->shadow_fd != -1) {
462 close(f->shadow_fd);
463 f->shadow_fd = -1;
464 }
465
466 f->engine_data = 0;
467 return ret;
468 }
469
file_lookup_open(struct fio_file * f,int flags)470 int file_lookup_open(struct fio_file *f, int flags)
471 {
472 struct fio_file *__f;
473 int from_hash;
474
475 __f = lookup_file_hash(f->file_name);
476 if (__f) {
477 dprint(FD_FILE, "found file in hash %s\n", f->file_name);
478 /*
479 * racy, need the __f->lock locked
480 */
481 f->lock = __f->lock;
482 from_hash = 1;
483 } else {
484 dprint(FD_FILE, "file not found in hash %s\n", f->file_name);
485 from_hash = 0;
486 }
487
488 #ifdef WIN32
489 flags |= _O_BINARY;
490 #endif
491
492 f->fd = open(f->file_name, flags, 0600);
493 return from_hash;
494 }
495
file_close_shadow_fds(struct thread_data * td)496 static int file_close_shadow_fds(struct thread_data *td)
497 {
498 struct fio_file *f;
499 int num_closed = 0;
500 unsigned int i;
501
502 for_each_file(td, f, i) {
503 if (f->shadow_fd == -1)
504 continue;
505
506 close(f->shadow_fd);
507 f->shadow_fd = -1;
508 num_closed++;
509 }
510
511 return num_closed;
512 }
513
generic_open_file(struct thread_data * td,struct fio_file * f)514 int generic_open_file(struct thread_data *td, struct fio_file *f)
515 {
516 int is_std = 0;
517 int flags = 0;
518 int from_hash = 0;
519
520 dprint(FD_FILE, "fd open %s\n", f->file_name);
521
522 if (td_trim(td) && f->filetype != FIO_TYPE_BD) {
523 log_err("fio: trim only applies to block device\n");
524 return 1;
525 }
526
527 if (!strcmp(f->file_name, "-")) {
528 if (td_rw(td)) {
529 log_err("fio: can't read/write to stdin/out\n");
530 return 1;
531 }
532 is_std = 1;
533
534 /*
535 * move output logging to stderr, if we are writing to stdout
536 */
537 if (td_write(td))
538 f_out = stderr;
539 }
540
541 if (td_trim(td))
542 goto skip_flags;
543 if (td->o.odirect)
544 flags |= OS_O_DIRECT;
545 if (td->o.oatomic) {
546 if (!FIO_O_ATOMIC) {
547 td_verror(td, EINVAL, "OS does not support atomic IO");
548 return 1;
549 }
550 flags |= OS_O_DIRECT | FIO_O_ATOMIC;
551 }
552 if (td->o.sync_io)
553 flags |= O_SYNC;
554 if (td->o.create_on_open)
555 flags |= O_CREAT;
556 skip_flags:
557 if (f->filetype != FIO_TYPE_FILE)
558 flags |= FIO_O_NOATIME;
559
560 open_again:
561 if (td_write(td)) {
562 if (!read_only)
563 flags |= O_RDWR;
564
565 if (f->filetype == FIO_TYPE_FILE)
566 flags |= O_CREAT;
567
568 if (is_std)
569 f->fd = dup(STDOUT_FILENO);
570 else
571 from_hash = file_lookup_open(f, flags);
572 } else if (td_read(td)) {
573 if (f->filetype == FIO_TYPE_CHAR && !read_only)
574 flags |= O_RDWR;
575 else
576 flags |= O_RDONLY;
577
578 if (is_std)
579 f->fd = dup(STDIN_FILENO);
580 else
581 from_hash = file_lookup_open(f, flags);
582 } else { //td trim
583 flags |= O_RDWR;
584 from_hash = file_lookup_open(f, flags);
585 }
586
587 if (f->fd == -1) {
588 char buf[FIO_VERROR_SIZE];
589 int __e = errno;
590
591 if (__e == EPERM && (flags & FIO_O_NOATIME)) {
592 flags &= ~FIO_O_NOATIME;
593 goto open_again;
594 }
595 if (__e == EMFILE && file_close_shadow_fds(td))
596 goto open_again;
597
598 snprintf(buf, sizeof(buf), "open(%s)", f->file_name);
599
600 if (__e == EINVAL && (flags & OS_O_DIRECT)) {
601 log_err("fio: looks like your file system does not " \
602 "support direct=1/buffered=0\n");
603 }
604
605 td_verror(td, __e, buf);
606 }
607
608 if (!from_hash && f->fd != -1) {
609 if (add_file_hash(f)) {
610 int fio_unused ret;
611
612 /*
613 * Stash away descriptor for later close. This is to
614 * work-around a "feature" on Linux, where a close of
615 * an fd that has been opened for write will trigger
616 * udev to call blkid to check partitions, fs id, etc.
617 * That pollutes the device cache, which can slow down
618 * unbuffered accesses.
619 */
620 if (f->shadow_fd == -1)
621 f->shadow_fd = f->fd;
622 else {
623 /*
624 * OK to ignore, we haven't done anything
625 * with it
626 */
627 ret = generic_close_file(td, f);
628 }
629 goto open_again;
630 }
631 }
632
633 return 0;
634 }
635
generic_get_file_size(struct thread_data * td,struct fio_file * f)636 int generic_get_file_size(struct thread_data *td, struct fio_file *f)
637 {
638 return get_file_size(td, f);
639 }
640
641 /*
642 * open/close all files, so that ->real_file_size gets set
643 */
get_file_sizes(struct thread_data * td)644 static int get_file_sizes(struct thread_data *td)
645 {
646 struct fio_file *f;
647 unsigned int i;
648 int err = 0;
649
650 for_each_file(td, f, i) {
651 dprint(FD_FILE, "get file size for %p/%d/%p\n", f, i,
652 f->file_name);
653
654 if (td_io_get_file_size(td, f)) {
655 if (td->error != ENOENT) {
656 log_err("%s\n", td->verror);
657 err = 1;
658 }
659 clear_error(td);
660 }
661
662 if (f->real_file_size == -1ULL && td->o.size)
663 f->real_file_size = td->o.size / td->o.nr_files;
664 }
665
666 return err;
667 }
668
669 struct fio_mount {
670 struct flist_head list;
671 const char *base;
672 char __base[256];
673 unsigned int key;
674 };
675
676 /*
677 * Get free number of bytes for each file on each unique mount.
678 */
get_fs_free_counts(struct thread_data * td)679 static unsigned long long get_fs_free_counts(struct thread_data *td)
680 {
681 struct flist_head *n, *tmp;
682 unsigned long long ret = 0;
683 struct fio_mount *fm;
684 FLIST_HEAD(list);
685 struct fio_file *f;
686 unsigned int i;
687
688 for_each_file(td, f, i) {
689 struct stat sb;
690 char buf[256];
691
692 if (f->filetype == FIO_TYPE_BD || f->filetype == FIO_TYPE_CHAR) {
693 if (f->real_file_size != -1ULL)
694 ret += f->real_file_size;
695 continue;
696 } else if (f->filetype != FIO_TYPE_FILE)
697 continue;
698
699 buf[255] = '\0';
700 strncpy(buf, f->file_name, 255);
701
702 if (stat(buf, &sb) < 0) {
703 if (errno != ENOENT)
704 break;
705 strcpy(buf, ".");
706 if (stat(buf, &sb) < 0)
707 break;
708 }
709
710 fm = NULL;
711 flist_for_each(n, &list) {
712 fm = flist_entry(n, struct fio_mount, list);
713 if (fm->key == sb.st_dev)
714 break;
715
716 fm = NULL;
717 }
718
719 if (fm)
720 continue;
721
722 fm = calloc(1, sizeof(*fm));
723 strncpy(fm->__base, buf, sizeof(fm->__base) - 1);
724 fm->base = basename(fm->__base);
725 fm->key = sb.st_dev;
726 flist_add(&fm->list, &list);
727 }
728
729 flist_for_each_safe(n, tmp, &list) {
730 unsigned long long sz;
731
732 fm = flist_entry(n, struct fio_mount, list);
733 flist_del(&fm->list);
734
735 sz = get_fs_size(fm->base);
736 if (sz && sz != -1ULL)
737 ret += sz;
738
739 free(fm);
740 }
741
742 return ret;
743 }
744
get_start_offset(struct thread_data * td,struct fio_file * f)745 uint64_t get_start_offset(struct thread_data *td, struct fio_file *f)
746 {
747 struct thread_options *o = &td->o;
748
749 if (o->file_append && f->filetype == FIO_TYPE_FILE)
750 return f->real_file_size;
751
752 return td->o.start_offset +
753 (td->thread_number - 1) * td->o.offset_increment;
754 }
755
756 /*
757 * Open the files and setup files sizes, creating files if necessary.
758 */
setup_files(struct thread_data * td)759 int setup_files(struct thread_data *td)
760 {
761 unsigned long long total_size, extend_size;
762 struct thread_options *o = &td->o;
763 struct fio_file *f;
764 unsigned int i, nr_fs_extra = 0;
765 int err = 0, need_extend;
766 int old_state;
767 const unsigned int bs = td_min_bs(td);
768 uint64_t fs = 0;
769
770 dprint(FD_FILE, "setup files\n");
771
772 old_state = td_bump_runstate(td, TD_SETTING_UP);
773
774 if (o->read_iolog_file)
775 goto done;
776
777 /*
778 * if ioengine defines a setup() method, it's responsible for
779 * opening the files and setting f->real_file_size to indicate
780 * the valid range for that file.
781 */
782 if (td->io_ops->setup)
783 err = td->io_ops->setup(td);
784 else
785 err = get_file_sizes(td);
786
787 if (err)
788 goto err_out;
789
790 /*
791 * check sizes. if the files/devices do not exist and the size
792 * isn't passed to fio, abort.
793 */
794 total_size = 0;
795 for_each_file(td, f, i) {
796 if (f->real_file_size == -1ULL)
797 total_size = -1ULL;
798 else
799 total_size += f->real_file_size;
800 }
801
802 if (o->fill_device)
803 td->fill_device_size = get_fs_free_counts(td);
804
805 /*
806 * device/file sizes are zero and no size given, punt
807 */
808 if ((!total_size || total_size == -1ULL) && !o->size &&
809 !(td->io_ops->flags & FIO_NOIO) && !o->fill_device &&
810 !(o->nr_files && (o->file_size_low || o->file_size_high))) {
811 log_err("%s: you need to specify size=\n", o->name);
812 td_verror(td, EINVAL, "total_file_size");
813 goto err_out;
814 }
815
816 /*
817 * Calculate per-file size and potential extra size for the
818 * first files, if needed.
819 */
820 if (!o->file_size_low && o->nr_files) {
821 uint64_t all_fs;
822
823 fs = o->size / o->nr_files;
824 all_fs = fs * o->nr_files;
825
826 if (all_fs < o->size)
827 nr_fs_extra = (o->size - all_fs) / bs;
828 }
829
830 /*
831 * now file sizes are known, so we can set ->io_size. if size= is
832 * not given, ->io_size is just equal to ->real_file_size. if size
833 * is given, ->io_size is size / nr_files.
834 */
835 extend_size = total_size = 0;
836 need_extend = 0;
837 for_each_file(td, f, i) {
838 f->file_offset = get_start_offset(td, f);
839
840 if (!o->file_size_low) {
841 /*
842 * no file size range given, file size is equal to
843 * total size divided by number of files. If that is
844 * zero, set it to the real file size. If the size
845 * doesn't divide nicely with the min blocksize,
846 * make the first files bigger.
847 */
848 f->io_size = fs;
849 if (nr_fs_extra) {
850 nr_fs_extra--;
851 f->io_size += bs;
852 }
853
854 if (!f->io_size)
855 f->io_size = f->real_file_size - f->file_offset;
856 } else if (f->real_file_size < o->file_size_low ||
857 f->real_file_size > o->file_size_high) {
858 if (f->file_offset > o->file_size_low)
859 goto err_offset;
860 /*
861 * file size given. if it's fixed, use that. if it's a
862 * range, generate a random size in-between.
863 */
864 if (o->file_size_low == o->file_size_high)
865 f->io_size = o->file_size_low - f->file_offset;
866 else {
867 f->io_size = get_rand_file_size(td)
868 - f->file_offset;
869 }
870 } else
871 f->io_size = f->real_file_size - f->file_offset;
872
873 if (f->io_size == -1ULL)
874 total_size = -1ULL;
875 else {
876 if (o->size_percent)
877 f->io_size = (f->io_size * o->size_percent) / 100;
878 total_size += f->io_size;
879 }
880
881 if (f->filetype == FIO_TYPE_FILE &&
882 (f->io_size + f->file_offset) > f->real_file_size &&
883 !(td->io_ops->flags & FIO_DISKLESSIO)) {
884 if (!o->create_on_open) {
885 need_extend++;
886 extend_size += (f->io_size + f->file_offset);
887 } else
888 f->real_file_size = f->io_size + f->file_offset;
889 fio_file_set_extend(f);
890 }
891 }
892
893 if (!o->size || o->size > total_size)
894 o->size = total_size;
895
896 if (o->size < td_min_bs(td)) {
897 log_err("fio: blocksize too large for data set\n");
898 goto err_out;
899 }
900
901 /*
902 * See if we need to extend some files
903 */
904 if (need_extend) {
905 temp_stall_ts = 1;
906 if (output_format == FIO_OUTPUT_NORMAL)
907 log_info("%s: Laying out IO file(s) (%u file(s) /"
908 " %lluMB)\n", o->name, need_extend,
909 extend_size >> 20);
910
911 for_each_file(td, f, i) {
912 unsigned long long old_len = -1ULL, extend_len = -1ULL;
913
914 if (!fio_file_extend(f))
915 continue;
916
917 assert(f->filetype == FIO_TYPE_FILE);
918 fio_file_clear_extend(f);
919 if (!o->fill_device) {
920 old_len = f->real_file_size;
921 extend_len = f->io_size + f->file_offset -
922 old_len;
923 }
924 f->real_file_size = (f->io_size + f->file_offset);
925 err = extend_file(td, f);
926 if (err)
927 break;
928
929 err = __file_invalidate_cache(td, f, old_len,
930 extend_len);
931
932 /*
933 * Shut up static checker
934 */
935 if (f->fd != -1)
936 close(f->fd);
937
938 f->fd = -1;
939 if (err)
940 break;
941 }
942 temp_stall_ts = 0;
943 }
944
945 if (err)
946 goto err_out;
947
948 if (!o->zone_size)
949 o->zone_size = o->size;
950
951 /*
952 * iolog already set the total io size, if we read back
953 * stored entries.
954 */
955 if (!o->read_iolog_file) {
956 if (o->io_limit)
957 td->total_io_size = o->io_limit * o->loops;
958 else
959 td->total_io_size = o->size * o->loops;
960 }
961
962 done:
963 if (o->create_only)
964 td->done = 1;
965
966 td_restore_runstate(td, old_state);
967 return 0;
968 err_offset:
969 log_err("%s: you need to specify valid offset=\n", o->name);
970 err_out:
971 td_restore_runstate(td, old_state);
972 return 1;
973 }
974
pre_read_files(struct thread_data * td)975 int pre_read_files(struct thread_data *td)
976 {
977 struct fio_file *f;
978 unsigned int i;
979
980 dprint(FD_FILE, "pre_read files\n");
981
982 for_each_file(td, f, i) {
983 pre_read_file(td, f);
984 }
985
986 return 1;
987 }
988
__init_rand_distribution(struct thread_data * td,struct fio_file * f)989 static int __init_rand_distribution(struct thread_data *td, struct fio_file *f)
990 {
991 unsigned int range_size, seed;
992 unsigned long nranges;
993 uint64_t file_size;
994
995 range_size = min(td->o.min_bs[DDIR_READ], td->o.min_bs[DDIR_WRITE]);
996 file_size = min(f->real_file_size, f->io_size);
997
998 nranges = (file_size + range_size - 1) / range_size;
999
1000 seed = jhash(f->file_name, strlen(f->file_name), 0) * td->thread_number;
1001 if (!td->o.rand_repeatable)
1002 seed = td->rand_seeds[4];
1003
1004 if (td->o.random_distribution == FIO_RAND_DIST_ZIPF)
1005 zipf_init(&f->zipf, nranges, td->o.zipf_theta.u.f, seed);
1006 else
1007 pareto_init(&f->zipf, nranges, td->o.pareto_h.u.f, seed);
1008
1009 return 1;
1010 }
1011
init_rand_distribution(struct thread_data * td)1012 static int init_rand_distribution(struct thread_data *td)
1013 {
1014 struct fio_file *f;
1015 unsigned int i;
1016 int state;
1017
1018 if (td->o.random_distribution == FIO_RAND_DIST_RANDOM)
1019 return 0;
1020
1021 state = td_bump_runstate(td, TD_SETTING_UP);
1022
1023 for_each_file(td, f, i)
1024 __init_rand_distribution(td, f);
1025
1026 td_restore_runstate(td, state);
1027
1028 return 1;
1029 }
1030
init_random_map(struct thread_data * td)1031 int init_random_map(struct thread_data *td)
1032 {
1033 unsigned long long blocks;
1034 struct fio_file *f;
1035 unsigned int i;
1036
1037 if (init_rand_distribution(td))
1038 return 0;
1039 if (!td_random(td))
1040 return 0;
1041
1042 for_each_file(td, f, i) {
1043 uint64_t file_size = min(f->real_file_size, f->io_size);
1044
1045 blocks = file_size / (unsigned long long) td->o.rw_min_bs;
1046
1047 if (td->o.random_generator == FIO_RAND_GEN_LFSR) {
1048 unsigned long seed;
1049
1050 seed = td->rand_seeds[FIO_RAND_BLOCK_OFF];
1051
1052 if (!lfsr_init(&f->lfsr, blocks, seed, 0))
1053 continue;
1054 } else if (!td->o.norandommap) {
1055 f->io_axmap = axmap_new(blocks);
1056 if (f->io_axmap)
1057 continue;
1058 } else if (td->o.norandommap)
1059 continue;
1060
1061 if (!td->o.softrandommap) {
1062 log_err("fio: failed allocating random map. If running"
1063 " a large number of jobs, try the 'norandommap'"
1064 " option or set 'softrandommap'. Or give"
1065 " a larger --alloc-size to fio.\n");
1066 return 1;
1067 }
1068
1069 log_info("fio: file %s failed allocating random map. Running "
1070 "job without.\n", f->file_name);
1071 }
1072
1073 return 0;
1074 }
1075
close_files(struct thread_data * td)1076 void close_files(struct thread_data *td)
1077 {
1078 struct fio_file *f;
1079 unsigned int i;
1080
1081 for_each_file(td, f, i) {
1082 if (fio_file_open(f))
1083 td_io_close_file(td, f);
1084 }
1085 }
1086
close_and_free_files(struct thread_data * td)1087 void close_and_free_files(struct thread_data *td)
1088 {
1089 struct fio_file *f;
1090 unsigned int i;
1091
1092 dprint(FD_FILE, "close files\n");
1093
1094 for_each_file(td, f, i) {
1095 if (fio_file_open(f))
1096 td_io_close_file(td, f);
1097
1098 remove_file_hash(f);
1099
1100 if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
1101 dprint(FD_FILE, "free unlink %s\n", f->file_name);
1102 unlink(f->file_name);
1103 }
1104
1105 sfree(f->file_name);
1106 f->file_name = NULL;
1107 axmap_free(f->io_axmap);
1108 f->io_axmap = NULL;
1109 sfree(f);
1110 }
1111
1112 td->o.filename = NULL;
1113 free(td->files);
1114 free(td->file_locks);
1115 td->files_index = 0;
1116 td->files = NULL;
1117 td->file_locks = NULL;
1118 td->o.file_lock_mode = FILE_LOCK_NONE;
1119 td->o.nr_files = 0;
1120 }
1121
get_file_type(struct fio_file * f)1122 static void get_file_type(struct fio_file *f)
1123 {
1124 struct stat sb;
1125
1126 if (!strcmp(f->file_name, "-"))
1127 f->filetype = FIO_TYPE_PIPE;
1128 else
1129 f->filetype = FIO_TYPE_FILE;
1130
1131 /* \\.\ is the device namespace in Windows, where every file is
1132 * a block device */
1133 if (strncmp(f->file_name, "\\\\.\\", 4) == 0)
1134 f->filetype = FIO_TYPE_BD;
1135
1136 if (!stat(f->file_name, &sb)) {
1137 if (S_ISBLK(sb.st_mode))
1138 f->filetype = FIO_TYPE_BD;
1139 else if (S_ISCHR(sb.st_mode))
1140 f->filetype = FIO_TYPE_CHAR;
1141 else if (S_ISFIFO(sb.st_mode))
1142 f->filetype = FIO_TYPE_PIPE;
1143 }
1144 }
1145
__is_already_allocated(const char * fname)1146 static int __is_already_allocated(const char *fname)
1147 {
1148 struct flist_head *entry;
1149 char *filename;
1150
1151 if (flist_empty(&filename_list))
1152 return 0;
1153
1154 flist_for_each(entry, &filename_list) {
1155 filename = flist_entry(entry, struct file_name, list)->filename;
1156
1157 if (strcmp(filename, fname) == 0)
1158 return 1;
1159 }
1160
1161 return 0;
1162 }
1163
is_already_allocated(const char * fname)1164 static int is_already_allocated(const char *fname)
1165 {
1166 int ret;
1167
1168 fio_file_hash_lock();
1169 ret = __is_already_allocated(fname);
1170 fio_file_hash_unlock();
1171 return ret;
1172 }
1173
set_already_allocated(const char * fname)1174 static void set_already_allocated(const char *fname)
1175 {
1176 struct file_name *fn;
1177
1178 fn = malloc(sizeof(struct file_name));
1179 fn->filename = strdup(fname);
1180
1181 fio_file_hash_lock();
1182 if (!__is_already_allocated(fname)) {
1183 flist_add_tail(&fn->list, &filename_list);
1184 fn = NULL;
1185 }
1186 fio_file_hash_unlock();
1187
1188 if (fn) {
1189 free(fn->filename);
1190 free(fn);
1191 }
1192 }
1193
1194
free_already_allocated(void)1195 static void free_already_allocated(void)
1196 {
1197 struct flist_head *entry, *tmp;
1198 struct file_name *fn;
1199
1200 if (flist_empty(&filename_list))
1201 return;
1202
1203 fio_file_hash_lock();
1204 flist_for_each_safe(entry, tmp, &filename_list) {
1205 fn = flist_entry(entry, struct file_name, list);
1206 free(fn->filename);
1207 flist_del(&fn->list);
1208 free(fn);
1209 }
1210
1211 fio_file_hash_unlock();
1212 }
1213
alloc_new_file(struct thread_data * td)1214 static struct fio_file *alloc_new_file(struct thread_data *td)
1215 {
1216 struct fio_file *f;
1217
1218 f = smalloc(sizeof(*f));
1219 if (!f) {
1220 log_err("fio: smalloc OOM\n");
1221 assert(0);
1222 return NULL;
1223 }
1224
1225 f->fd = -1;
1226 f->shadow_fd = -1;
1227 fio_file_reset(td, f);
1228 return f;
1229 }
1230
add_file(struct thread_data * td,const char * fname,int numjob,int inc)1231 int add_file(struct thread_data *td, const char *fname, int numjob, int inc)
1232 {
1233 int cur_files = td->files_index;
1234 char file_name[PATH_MAX];
1235 struct fio_file *f;
1236 int len = 0;
1237
1238 dprint(FD_FILE, "add file %s\n", fname);
1239
1240 if (td->o.directory)
1241 len = set_name_idx(file_name, td->o.directory, numjob);
1242
1243 sprintf(file_name + len, "%s", fname);
1244
1245 /* clean cloned siblings using existing files */
1246 if (numjob && is_already_allocated(file_name))
1247 return 0;
1248
1249 f = alloc_new_file(td);
1250
1251 if (td->files_size <= td->files_index) {
1252 unsigned int new_size = td->o.nr_files + 1;
1253
1254 dprint(FD_FILE, "resize file array to %d files\n", new_size);
1255
1256 td->files = realloc(td->files, new_size * sizeof(f));
1257 if (td->files == NULL) {
1258 log_err("fio: realloc OOM\n");
1259 assert(0);
1260 }
1261 if (td->o.file_lock_mode != FILE_LOCK_NONE) {
1262 td->file_locks = realloc(td->file_locks, new_size);
1263 if (!td->file_locks) {
1264 log_err("fio: realloc OOM\n");
1265 assert(0);
1266 }
1267 td->file_locks[cur_files] = FILE_LOCK_NONE;
1268 }
1269 td->files_size = new_size;
1270 }
1271 td->files[cur_files] = f;
1272 f->fileno = cur_files;
1273
1274 /*
1275 * init function, io engine may not be loaded yet
1276 */
1277 if (td->io_ops && (td->io_ops->flags & FIO_DISKLESSIO))
1278 f->real_file_size = -1ULL;
1279
1280 f->file_name = smalloc_strdup(file_name);
1281 if (!f->file_name) {
1282 log_err("fio: smalloc OOM\n");
1283 assert(0);
1284 }
1285
1286 get_file_type(f);
1287
1288 switch (td->o.file_lock_mode) {
1289 case FILE_LOCK_NONE:
1290 break;
1291 case FILE_LOCK_READWRITE:
1292 f->rwlock = fio_rwlock_init();
1293 break;
1294 case FILE_LOCK_EXCLUSIVE:
1295 f->lock = fio_mutex_init(FIO_MUTEX_UNLOCKED);
1296 break;
1297 default:
1298 log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
1299 assert(0);
1300 }
1301
1302 td->files_index++;
1303 if (f->filetype == FIO_TYPE_FILE)
1304 td->nr_normal_files++;
1305
1306 set_already_allocated(file_name);
1307
1308 if (inc)
1309 td->o.nr_files++;
1310
1311 dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name,
1312 cur_files);
1313
1314 return cur_files;
1315 }
1316
add_file_exclusive(struct thread_data * td,const char * fname)1317 int add_file_exclusive(struct thread_data *td, const char *fname)
1318 {
1319 struct fio_file *f;
1320 unsigned int i;
1321
1322 for_each_file(td, f, i) {
1323 if (!strcmp(f->file_name, fname))
1324 return i;
1325 }
1326
1327 return add_file(td, fname, 0, 1);
1328 }
1329
get_file(struct fio_file * f)1330 void get_file(struct fio_file *f)
1331 {
1332 dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
1333 assert(fio_file_open(f));
1334 f->references++;
1335 }
1336
put_file(struct thread_data * td,struct fio_file * f)1337 int put_file(struct thread_data *td, struct fio_file *f)
1338 {
1339 int f_ret = 0, ret = 0;
1340
1341 dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
1342
1343 if (!fio_file_open(f)) {
1344 assert(f->fd == -1);
1345 return 0;
1346 }
1347
1348 assert(f->references);
1349 if (--f->references)
1350 return 0;
1351
1352 if (should_fsync(td) && td->o.fsync_on_close) {
1353 f_ret = fsync(f->fd);
1354 if (f_ret < 0)
1355 f_ret = errno;
1356 }
1357
1358 if (td->io_ops->close_file)
1359 ret = td->io_ops->close_file(td, f);
1360
1361 if (!ret)
1362 ret = f_ret;
1363
1364 td->nr_open_files--;
1365 fio_file_clear_open(f);
1366 assert(f->fd == -1);
1367 return ret;
1368 }
1369
lock_file(struct thread_data * td,struct fio_file * f,enum fio_ddir ddir)1370 void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
1371 {
1372 if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1373 return;
1374
1375 if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
1376 if (ddir == DDIR_READ)
1377 fio_rwlock_read(f->rwlock);
1378 else
1379 fio_rwlock_write(f->rwlock);
1380 } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1381 fio_mutex_down(f->lock);
1382
1383 td->file_locks[f->fileno] = td->o.file_lock_mode;
1384 }
1385
unlock_file(struct thread_data * td,struct fio_file * f)1386 void unlock_file(struct thread_data *td, struct fio_file *f)
1387 {
1388 if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
1389 return;
1390
1391 if (td->o.file_lock_mode == FILE_LOCK_READWRITE)
1392 fio_rwlock_unlock(f->rwlock);
1393 else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1394 fio_mutex_up(f->lock);
1395
1396 td->file_locks[f->fileno] = FILE_LOCK_NONE;
1397 }
1398
unlock_file_all(struct thread_data * td,struct fio_file * f)1399 void unlock_file_all(struct thread_data *td, struct fio_file *f)
1400 {
1401 if (td->o.file_lock_mode == FILE_LOCK_NONE || !td->file_locks)
1402 return;
1403 if (td->file_locks[f->fileno] != FILE_LOCK_NONE)
1404 unlock_file(td, f);
1405 }
1406
recurse_dir(struct thread_data * td,const char * dirname)1407 static int recurse_dir(struct thread_data *td, const char *dirname)
1408 {
1409 struct dirent *dir;
1410 int ret = 0;
1411 DIR *D;
1412
1413 D = opendir(dirname);
1414 if (!D) {
1415 char buf[FIO_VERROR_SIZE];
1416
1417 snprintf(buf, FIO_VERROR_SIZE, "opendir(%s)", dirname);
1418 td_verror(td, errno, buf);
1419 return 1;
1420 }
1421
1422 while ((dir = readdir(D)) != NULL) {
1423 char full_path[PATH_MAX];
1424 struct stat sb;
1425
1426 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
1427 continue;
1428
1429 sprintf(full_path, "%s%s%s", dirname, FIO_OS_PATH_SEPARATOR, dir->d_name);
1430
1431 if (lstat(full_path, &sb) == -1) {
1432 if (errno != ENOENT) {
1433 td_verror(td, errno, "stat");
1434 ret = 1;
1435 break;
1436 }
1437 }
1438
1439 if (S_ISREG(sb.st_mode)) {
1440 add_file(td, full_path, 0, 1);
1441 continue;
1442 }
1443 if (!S_ISDIR(sb.st_mode))
1444 continue;
1445
1446 ret = recurse_dir(td, full_path);
1447 if (ret)
1448 break;
1449 }
1450
1451 closedir(D);
1452 return ret;
1453 }
1454
add_dir_files(struct thread_data * td,const char * path)1455 int add_dir_files(struct thread_data *td, const char *path)
1456 {
1457 int ret = recurse_dir(td, path);
1458
1459 if (!ret)
1460 log_info("fio: opendir added %d files\n", td->o.nr_files);
1461
1462 return ret;
1463 }
1464
dup_files(struct thread_data * td,struct thread_data * org)1465 void dup_files(struct thread_data *td, struct thread_data *org)
1466 {
1467 struct fio_file *f;
1468 unsigned int i;
1469
1470 dprint(FD_FILE, "dup files: %d\n", org->files_index);
1471
1472 if (!org->files)
1473 return;
1474
1475 td->files = malloc(org->files_index * sizeof(f));
1476
1477 if (td->o.file_lock_mode != FILE_LOCK_NONE)
1478 td->file_locks = malloc(org->files_index);
1479
1480 for_each_file(org, f, i) {
1481 struct fio_file *__f;
1482
1483 __f = alloc_new_file(td);
1484
1485 if (f->file_name) {
1486 __f->file_name = smalloc_strdup(f->file_name);
1487 if (!__f->file_name) {
1488 log_err("fio: smalloc OOM\n");
1489 assert(0);
1490 }
1491
1492 __f->filetype = f->filetype;
1493 }
1494
1495 if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
1496 __f->lock = f->lock;
1497 else if (td->o.file_lock_mode == FILE_LOCK_READWRITE)
1498 __f->rwlock = f->rwlock;
1499
1500 td->files[i] = __f;
1501 }
1502 }
1503
1504 /*
1505 * Returns the index that matches the filename, or -1 if not there
1506 */
get_fileno(struct thread_data * td,const char * fname)1507 int get_fileno(struct thread_data *td, const char *fname)
1508 {
1509 struct fio_file *f;
1510 unsigned int i;
1511
1512 for_each_file(td, f, i)
1513 if (!strcmp(f->file_name, fname))
1514 return i;
1515
1516 return -1;
1517 }
1518
1519 /*
1520 * For log usage, where we add/open/close files automatically
1521 */
free_release_files(struct thread_data * td)1522 void free_release_files(struct thread_data *td)
1523 {
1524 close_files(td);
1525 td->files_index = 0;
1526 td->nr_normal_files = 0;
1527 }
1528
fio_file_reset(struct thread_data * td,struct fio_file * f)1529 void fio_file_reset(struct thread_data *td, struct fio_file *f)
1530 {
1531 f->last_pos = f->file_offset;
1532 f->last_start = -1ULL;
1533 if (f->io_axmap)
1534 axmap_reset(f->io_axmap);
1535 if (td->o.random_generator == FIO_RAND_GEN_LFSR)
1536 lfsr_reset(&f->lfsr, td->rand_seeds[FIO_RAND_BLOCK_OFF]);
1537 }
1538
fio_files_done(struct thread_data * td)1539 int fio_files_done(struct thread_data *td)
1540 {
1541 struct fio_file *f;
1542 unsigned int i;
1543
1544 for_each_file(td, f, i)
1545 if (!fio_file_done(f))
1546 return 0;
1547
1548 return 1;
1549 }
1550
1551 /* free memory used in initialization phase only */
filesetup_mem_free(void)1552 void filesetup_mem_free(void)
1553 {
1554 free_already_allocated();
1555 }
1556