forked from axboe/fio
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathfilesetup.c
2149 lines (1775 loc) · 45.7 KB
/
filesetup.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <assert.h>
#include <dirent.h>
#include <libgen.h>
#include <sys/stat.h>
#include "fio.h"
#include "smalloc.h"
#include "filehash.h"
#include "options.h"
#include "os/os.h"
#include "hash.h"
#include "lib/axmap.h"
#include "rwlock.h"
#include "zbd.h"
#ifdef CONFIG_LINUX_FALLOCATE
#include <linux/falloc.h>
#endif
static FLIST_HEAD(filename_list);
/*
* List entry for filename_list
*/
struct file_name {
struct flist_head list;
char *filename;
};
static inline void clear_error(struct thread_data *td)
{
td->error = 0;
td->verror[0] = '\0';
}
static int native_fallocate(struct thread_data *td, struct fio_file *f)
{
bool success;
success = fio_fallocate(f, 0, f->real_file_size);
dprint(FD_FILE, "native fallocate of file %s size %llu was "
"%ssuccessful\n", f->file_name,
(unsigned long long) f->real_file_size,
!success ? "un": "");
if (success)
return false;
if (errno == ENOSYS)
dprint(FD_FILE, "native fallocate is not implemented\n");
return true;
}
static void fallocate_file(struct thread_data *td, struct fio_file *f)
{
if (td->o.fill_device)
return;
switch (td->o.fallocate_mode) {
case FIO_FALLOCATE_NATIVE:
native_fallocate(td, f);
break;
case FIO_FALLOCATE_NONE:
break;
#ifdef CONFIG_POSIX_FALLOCATE
case FIO_FALLOCATE_POSIX: {
int r;
dprint(FD_FILE, "posix_fallocate file %s size %llu\n",
f->file_name,
(unsigned long long) f->real_file_size);
r = posix_fallocate(f->fd, 0, f->real_file_size);
if (r > 0)
log_err("fio: posix_fallocate fails: %s\n", strerror(r));
break;
}
#endif /* CONFIG_POSIX_FALLOCATE */
#ifdef CONFIG_LINUX_FALLOCATE
case FIO_FALLOCATE_KEEP_SIZE: {
int r;
dprint(FD_FILE, "fallocate(FALLOC_FL_KEEP_SIZE) "
"file %s size %llu\n", f->file_name,
(unsigned long long) f->real_file_size);
r = fallocate(f->fd, FALLOC_FL_KEEP_SIZE, 0, f->real_file_size);
if (r != 0)
td_verror(td, errno, "fallocate");
break;
}
#endif /* CONFIG_LINUX_FALLOCATE */
case FIO_FALLOCATE_TRUNCATE: {
int r;
dprint(FD_FILE, "ftruncate file %s size %llu\n",
f->file_name,
(unsigned long long) f->real_file_size);
r = ftruncate(f->fd, f->real_file_size);
if (r != 0)
td_verror(td, errno, "ftruncate");
break;
}
default:
log_err("fio: unknown fallocate mode: %d\n", td->o.fallocate_mode);
assert(0);
}
}
/*
* Leaves f->fd open on success, caller must close
*/
static int extend_file(struct thread_data *td, struct fio_file *f)
{
int new_layout = 0, unlink_file = 0, flags;
unsigned long long left;
unsigned long long bs;
char *b = NULL;
if (read_only) {
log_err("fio: refusing extend of file due to read-only\n");
return 0;
}
/*
* check if we need to lay the file out complete again. fio
* does that for operations involving reads, or for writes
* where overwrite is set
*/
if (td_read(td) ||
(td_write(td) && td->o.overwrite && !td->o.file_append) ||
(td_write(td) && td_ioengine_flagged(td, FIO_NOEXTEND)))
new_layout = 1;
if (td_write(td) && !td->o.overwrite && !td->o.file_append)
unlink_file = 1;
if (unlink_file || new_layout) {
int ret;
dprint(FD_FILE, "layout unlink %s\n", f->file_name);
ret = td_io_unlink_file(td, f);
if (ret != 0 && ret != ENOENT) {
td_verror(td, errno, "unlink");
return 1;
}
}
flags = O_WRONLY;
if (td->o.allow_create)
flags |= O_CREAT;
if (new_layout)
flags |= O_TRUNC;
#ifdef WIN32
flags |= _O_BINARY;
#endif
dprint(FD_FILE, "open file %s, flags %x\n", f->file_name, flags);
f->fd = open(f->file_name, flags, 0644);
if (f->fd < 0) {
int err = errno;
if (err == ENOENT && !td->o.allow_create)
log_err("fio: file creation disallowed by "
"allow_file_create=0\n");
else
td_verror(td, err, "open");
return 1;
}
fallocate_file(td, f);
/*
* If our jobs don't require regular files initially, we're done.
*/
if (!new_layout)
goto done;
/*
* The size will be -1ULL when fill_device is used, so don't truncate
* or fallocate this file, just write it
*/
if (!td->o.fill_device) {
dprint(FD_FILE, "truncate file %s, size %llu\n", f->file_name,
(unsigned long long) f->real_file_size);
if (ftruncate(f->fd, f->real_file_size) == -1) {
if (errno != EFBIG) {
td_verror(td, errno, "ftruncate");
goto err;
}
}
}
left = f->real_file_size;
bs = td->o.max_bs[DDIR_WRITE];
if (bs > left)
bs = left;
b = malloc(bs);
if (!b) {
td_verror(td, errno, "malloc");
goto err;
}
while (left && !td->terminate) {
ssize_t r;
if (bs > left)
bs = left;
fill_io_buffer(td, b, bs, bs);
r = write(f->fd, b, bs);
if (r > 0) {
left -= r;
continue;
} else {
if (r < 0) {
int __e = errno;
if (__e == ENOSPC || __e == EDQUOT) {
const char *__e_name;
if (td->o.fill_device)
break;
if (__e == ENOSPC)
__e_name = "ENOSPC";
else
__e_name = "EDQUOT";
log_info("fio: %s on laying out "
"file, stopping\n", __e_name);
}
td_verror(td, errno, "write");
} else
td_verror(td, EIO, "write");
goto err;
}
}
if (td->terminate) {
dprint(FD_FILE, "terminate unlink %s\n", f->file_name);
td_io_unlink_file(td, f);
} else if (td->o.create_fsync) {
if (fsync(f->fd) < 0) {
td_verror(td, errno, "fsync");
goto err;
}
}
if (td->o.fill_device && !td_write(td)) {
fio_file_clear_size_known(f);
if (td_io_get_file_size(td, f))
goto err;
if (f->io_size > f->real_file_size)
f->io_size = f->real_file_size;
}
free(b);
done:
return 0;
err:
close(f->fd);
f->fd = -1;
if (b)
free(b);
return 1;
}
static bool pre_read_file(struct thread_data *td, struct fio_file *f)
{
int r, did_open = 0, old_runstate;
unsigned long long left;
unsigned long long bs;
bool ret = true;
char *b;
if (td_ioengine_flagged(td, FIO_PIPEIO) ||
td_ioengine_flagged(td, FIO_NOIO))
return true;
if (f->filetype == FIO_TYPE_CHAR)
return true;
if (!fio_file_open(f)) {
if (td->io_ops->open_file(td, f)) {
log_err("fio: cannot pre-read, failed to open file\n");
return false;
}
did_open = 1;
}
old_runstate = td_bump_runstate(td, TD_PRE_READING);
left = f->io_size;
bs = td->o.max_bs[DDIR_READ];
if (bs > left)
bs = left;
b = calloc(1, bs);
if (!b) {
td_verror(td, errno, "malloc");
ret = false;
goto error;
}
if (lseek(f->fd, f->file_offset, SEEK_SET) < 0) {
td_verror(td, errno, "lseek");
log_err("fio: failed to lseek pre-read file\n");
ret = false;
goto error;
}
while (left && !td->terminate) {
if (bs > left)
bs = left;
r = read(f->fd, b, bs);
if (r == (int) bs) {
left -= bs;
continue;
} else {
td_verror(td, EIO, "pre_read");
break;
}
}
error:
td_restore_runstate(td, old_runstate);
if (did_open)
td->io_ops->close_file(td, f);
free(b);
return ret;
}
/*
* Generic function to prepopulate regular file with data.
* Useful if you want to make sure I/O engine has data to read.
* Leaves f->fd open on success, caller must close.
*/
int generic_prepopulate_file(struct thread_data *td, struct fio_file *f)
{
int flags;
unsigned long long left, bs;
char *b = NULL;
/* generic function for regular files only */
assert(f->filetype == FIO_TYPE_FILE);
if (read_only) {
log_err("fio: refusing to write a file due to read-only\n");
return 0;
}
flags = O_WRONLY;
if (td->o.allow_create)
flags |= O_CREAT;
#ifdef WIN32
flags |= _O_BINARY;
#endif
dprint(FD_FILE, "open file %s, flags %x\n", f->file_name, flags);
f->fd = open(f->file_name, flags, 0644);
if (f->fd < 0) {
int err = errno;
if (err == ENOENT && !td->o.allow_create)
log_err("fio: file creation disallowed by "
"allow_file_create=0\n");
else
td_verror(td, err, "open");
return 1;
}
left = f->real_file_size;
bs = td->o.max_bs[DDIR_WRITE];
if (bs > left)
bs = left;
b = malloc(bs);
if (!b) {
td_verror(td, errno, "malloc");
goto err;
}
while (left && !td->terminate) {
ssize_t r;
if (bs > left)
bs = left;
fill_io_buffer(td, b, bs, bs);
r = write(f->fd, b, bs);
if (r > 0) {
left -= r;
} else {
td_verror(td, errno, "write");
goto err;
}
}
if (td->terminate) {
dprint(FD_FILE, "terminate unlink %s\n", f->file_name);
td_io_unlink_file(td, f);
} else if (td->o.create_fsync) {
if (fsync(f->fd) < 0) {
td_verror(td, errno, "fsync");
goto err;
}
}
free(b);
return 0;
err:
close(f->fd);
f->fd = -1;
if (b)
free(b);
return 1;
}
unsigned long long get_rand_file_size(struct thread_data *td)
{
unsigned long long ret, sized;
uint64_t frand_max;
uint64_t r;
frand_max = rand_max(&td->file_size_state);
r = __rand(&td->file_size_state);
sized = td->o.file_size_high - td->o.file_size_low;
ret = (unsigned long long) ((double) sized * (r / (frand_max + 1.0)));
ret += td->o.file_size_low;
ret -= (ret % td->o.rw_min_bs);
return ret;
}
static int file_size(struct thread_data *td, struct fio_file *f)
{
struct stat st;
if (stat(f->file_name, &st) == -1) {
td_verror(td, errno, "fstat");
return 1;
}
f->real_file_size = st.st_size;
return 0;
}
static int bdev_size(struct thread_data *td, struct fio_file *f)
{
unsigned long long bytes = 0;
int r;
if (td->io_ops->open_file(td, f)) {
log_err("fio: failed opening blockdev %s for size check\n",
f->file_name);
return 1;
}
r = blockdev_size(f, &bytes);
if (r) {
td_verror(td, r, "blockdev_size");
goto err;
}
if (!bytes) {
log_err("%s: zero sized block device?\n", f->file_name);
goto err;
}
f->real_file_size = bytes;
td->io_ops->close_file(td, f);
return 0;
err:
td->io_ops->close_file(td, f);
return 1;
}
static int char_size(struct thread_data *td, struct fio_file *f)
{
#ifdef FIO_HAVE_CHARDEV_SIZE
unsigned long long bytes = 0;
int r;
if (td->io_ops->open_file(td, f)) {
log_err("fio: failed opening chardev %s for size check\n",
f->file_name);
return 1;
}
r = chardev_size(f, &bytes);
if (r) {
td_verror(td, r, "chardev_size");
goto err;
}
if (!bytes) {
log_err("%s: zero sized char device?\n", f->file_name);
goto err;
}
f->real_file_size = bytes;
td->io_ops->close_file(td, f);
return 0;
err:
td->io_ops->close_file(td, f);
return 1;
#else
f->real_file_size = -1ULL;
return 0;
#endif
}
static int get_file_size(struct thread_data *td, struct fio_file *f)
{
int ret = 0;
if (fio_file_size_known(f))
return 0;
if (f->filetype == FIO_TYPE_FILE)
ret = file_size(td, f);
else if (f->filetype == FIO_TYPE_BLOCK)
ret = bdev_size(td, f);
else if (f->filetype == FIO_TYPE_CHAR)
ret = char_size(td, f);
else {
f->real_file_size = -1;
log_info("%s: failed to get file size of %s\n", td->o.name,
f->file_name);
return 1; /* avoid offset extends end error message */
}
/*
* Leave ->real_file_size with 0 since it could be expectation
* of initial setup for regular files.
*/
if (ret)
return ret;
/*
* ->file_offset normally hasn't been initialized yet, so this
* is basically always false unless ->real_file_size is -1, but
* if ->real_file_size is -1 this message doesn't make sense.
* As a result, this message is basically useless.
*/
if (f->file_offset > f->real_file_size) {
log_err("%s: offset extends end (%llu > %llu)\n", td->o.name,
(unsigned long long) f->file_offset,
(unsigned long long) f->real_file_size);
return 1;
}
fio_file_set_size_known(f);
return 0;
}
static int __file_invalidate_cache(struct thread_data *td, struct fio_file *f,
unsigned long long off,
unsigned long long len)
{
int errval = 0, ret = 0;
#ifdef CONFIG_ESX
return 0;
#endif
if (len == -1ULL)
len = f->io_size;
if (off == -1ULL)
off = f->file_offset;
if (len == -1ULL || off == -1ULL)
return 0;
if (td->io_ops->invalidate) {
dprint(FD_IO, "invalidate %s cache %s\n", td->io_ops->name,
f->file_name);
ret = td->io_ops->invalidate(td, f);
if (ret < 0)
errval = -ret;
} else if (td_ioengine_flagged(td, FIO_DISKLESSIO)) {
dprint(FD_IO, "invalidate not supported by ioengine %s\n",
td->io_ops->name);
} else if (f->filetype == FIO_TYPE_FILE) {
dprint(FD_IO, "declare unneeded cache %s: %llu/%llu\n",
f->file_name, off, len);
ret = posix_fadvise(f->fd, off, len, POSIX_FADV_DONTNEED);
if (ret)
errval = ret;
} else if (f->filetype == FIO_TYPE_BLOCK) {
int retry_count = 0;
dprint(FD_IO, "drop page cache %s\n", f->file_name);
ret = blockdev_invalidate_cache(f);
while (ret < 0 && errno == EAGAIN && retry_count++ < 25) {
/*
* Linux multipath devices reject ioctl while
* the maps are being updated. That window can
* last tens of milliseconds; we'll try up to
* a quarter of a second.
*/
usleep(10000);
ret = blockdev_invalidate_cache(f);
}
if (ret < 0 && errno == EACCES && geteuid()) {
if (!fio_did_warn(FIO_WARN_ROOT_FLUSH)) {
log_err("fio: only root may flush block "
"devices. Cache flush bypassed!\n");
}
}
if (ret < 0)
errval = errno;
} else if (f->filetype == FIO_TYPE_CHAR ||
f->filetype == FIO_TYPE_PIPE) {
dprint(FD_IO, "invalidate not supported %s\n", f->file_name);
}
/*
* Cache flushing isn't a fatal condition, and we know it will
* happen on some platforms where we don't have the proper
* function to flush eg block device caches. So just warn and
* continue on our way.
*/
if (errval)
log_info("fio: cache invalidation of %s failed: %s\n",
f->file_name, strerror(errval));
return 0;
}
int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
{
if (!fio_file_open(f))
return 0;
return __file_invalidate_cache(td, f, -1ULL, -1ULL);
}
int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
{
int ret = 0;
dprint(FD_FILE, "fd close %s\n", f->file_name);
remove_file_hash(f);
if (close(f->fd) < 0)
ret = errno;
f->fd = -1;
if (f->shadow_fd != -1) {
close(f->shadow_fd);
f->shadow_fd = -1;
}
f->engine_pos = 0;
return ret;
}
int file_lookup_open(struct fio_file *f, int flags)
{
struct fio_file *__f;
int from_hash;
__f = lookup_file_hash(f->file_name);
if (__f) {
dprint(FD_FILE, "found file in hash %s\n", f->file_name);
f->lock = __f->lock;
from_hash = 1;
} else {
dprint(FD_FILE, "file not found in hash %s\n", f->file_name);
from_hash = 0;
}
#ifdef WIN32
flags |= _O_BINARY;
#endif
f->fd = open(f->file_name, flags, 0600);
return from_hash;
}
static int file_close_shadow_fds(struct thread_data *td)
{
struct fio_file *f;
int num_closed = 0;
unsigned int i;
for_each_file(td, f, i) {
if (f->shadow_fd == -1)
continue;
close(f->shadow_fd);
f->shadow_fd = -1;
num_closed++;
}
return num_closed;
}
int generic_open_file(struct thread_data *td, struct fio_file *f)
{
int is_std = 0;
int flags = 0;
int from_hash = 0;
dprint(FD_FILE, "fd open %s\n", f->file_name);
if (!strcmp(f->file_name, "-")) {
if (td_rw(td)) {
log_err("fio: can't read/write to stdin/out\n");
return 1;
}
is_std = 1;
/*
* move output logging to stderr, if we are writing to stdout
*/
if (td_write(td))
f_out = stderr;
}
if (td->o.odirect)
flags |= OS_O_DIRECT;
flags |= td->o.sync_io;
if (td->o.create_on_open && td->o.allow_create)
flags |= O_CREAT;
if (f->filetype != FIO_TYPE_FILE)
flags |= FIO_O_NOATIME;
open_again:
if (td_write(td)) {
if (!read_only)
flags |= O_RDWR;
if (td->o.verify_only) {
flags &= ~O_RDWR;
flags |= O_RDONLY;
}
if (f->filetype == FIO_TYPE_FILE && td->o.allow_create)
flags |= O_CREAT;
if (is_std)
f->fd = dup(STDOUT_FILENO);
else
from_hash = file_lookup_open(f, flags);
} else if (td_read(td)) {
if (td_ioengine_flagged(td, FIO_RO_NEEDS_RW_OPEN) && !read_only)
flags |= O_RDWR;
else
flags |= O_RDONLY;
if (is_std)
f->fd = dup(STDIN_FILENO);
else
from_hash = file_lookup_open(f, flags);
} else if (td_trim(td)) {
assert(!td_rw(td)); /* should have matched above */
if (!read_only)
flags |= O_RDWR;
from_hash = file_lookup_open(f, flags);
}
if (f->fd == -1) {
char buf[FIO_VERROR_SIZE];
int __e = errno;
if (__e == EPERM && (flags & FIO_O_NOATIME)) {
flags &= ~FIO_O_NOATIME;
goto open_again;
}
if (__e == EMFILE && file_close_shadow_fds(td))
goto open_again;
snprintf(buf, sizeof(buf), "open(%s)", f->file_name);
if (__e == EINVAL && (flags & OS_O_DIRECT)) {
log_err("fio: looks like your file system does not " \
"support direct=1/buffered=0\n");
}
td_verror(td, __e, buf);
return 1;
}
if (!from_hash && f->fd != -1) {
if (add_file_hash(f)) {
int fio_unused ret;
/*
* Stash away descriptor for later close. This is to
* work-around a "feature" on Linux, where a close of
* an fd that has been opened for write will trigger
* udev to call blkid to check partitions, fs id, etc.
* That pollutes the device cache, which can slow down
* unbuffered accesses.
*/
if (f->shadow_fd == -1)
f->shadow_fd = f->fd;
else {
/*
* OK to ignore, we haven't done anything
* with it
*/
ret = generic_close_file(td, f);
}
goto open_again;
}
}
return 0;
}
/*
* This function i.e. get_file_size() is the default .get_file_size
* implementation of majority of I/O engines.
*/
int generic_get_file_size(struct thread_data *td, struct fio_file *f)
{
return get_file_size(td, f);
}
/*
* open/close all files, so that ->real_file_size gets set
*/
static int get_file_sizes(struct thread_data *td)
{
struct fio_file *f;
unsigned int i;
int err = 0;
for_each_file(td, f, i) {
dprint(FD_FILE, "get file size for %p/%d/%s\n", f, i,
f->file_name);
if (td_io_get_file_size(td, f)) {
if (td->error != ENOENT) {
log_err("%s\n", td->verror);
err = 1;
break;
}
clear_error(td);
}
/*
* There are corner cases where we end up with -1 for
* ->real_file_size due to unsupported file type, etc.
* We then just set to size option value divided by number
* of files, similar to the way file ->io_size is set.
* stat(2) failure doesn't set ->real_file_size to -1.
*/
if (f->real_file_size == -1ULL && td->o.size)
f->real_file_size = td->o.size / td->o.nr_files;
}
return err;
}
struct fio_mount {
struct flist_head list;
const char *base;
char __base[256];
unsigned int key;
};
/*
* Get free number of bytes for each file on each unique mount.
*/
static unsigned long long get_fs_free_counts(struct thread_data *td)
{
struct flist_head *n, *tmp;
unsigned long long ret = 0;
struct fio_mount *fm;
FLIST_HEAD(list);
struct fio_file *f;
unsigned int i;
for_each_file(td, f, i) {
struct stat sb;
char buf[256];
if (f->filetype == FIO_TYPE_BLOCK || f->filetype == FIO_TYPE_CHAR) {
if (f->real_file_size != -1ULL)
ret += f->real_file_size;
continue;
} else if (f->filetype != FIO_TYPE_FILE)
continue;
snprintf(buf, FIO_ARRAY_SIZE(buf), "%s", f->file_name);
if (stat(buf, &sb) < 0) {
if (errno != ENOENT)
break;
strcpy(buf, ".");
if (stat(buf, &sb) < 0)
break;
}
fm = NULL;
flist_for_each(n, &list) {
fm = flist_entry(n, struct fio_mount, list);
if (fm->key == sb.st_dev)
break;
fm = NULL;
}
if (fm)
continue;
fm = calloc(1, sizeof(*fm));
snprintf(fm->__base, FIO_ARRAY_SIZE(fm->__base), "%s", buf);
fm->base = basename(fm->__base);
fm->key = sb.st_dev;
flist_add(&fm->list, &list);
}
flist_for_each_safe(n, tmp, &list) {
unsigned long long sz;
fm = flist_entry(n, struct fio_mount, list);
flist_del(&fm->list);
sz = get_fs_free_size(fm->base);
if (sz && sz != -1ULL)
ret += sz;
free(fm);
}
return ret;
}
uint64_t get_start_offset(struct thread_data *td, struct fio_file *f)
{
bool align = false;
struct thread_options *o = &td->o;
unsigned long long align_bs;
unsigned long long offset;
unsigned long long increment;
if (o->file_append && f->filetype == FIO_TYPE_FILE)
return f->real_file_size;
if (o->offset_increment_percent) {
assert(!o->offset_increment);
increment = o->offset_increment_percent * f->real_file_size / 100;
align = true;
} else
increment = o->offset_increment;
if (o->start_offset_percent > 0) {
/* calculate the raw offset */
offset = (f->real_file_size * o->start_offset_percent / 100) +
(td->subjob_number * increment);
align = true;
} else {
/* start_offset_percent not set */
offset = o->start_offset +
td->subjob_number * increment;
}
if (align) {
/*
* if offset_align is provided, use it
*/
if (fio_option_is_set(o, start_offset_align)) {
align_bs = o->start_offset_align;
} else {
/* else take the minimum block size */
align_bs = td_min_bs(td);
}
/*
* block align the offset at the next available boundary at
* ceiling(offset / align_bs) * align_bs
*/
offset = (offset / align_bs + (offset % align_bs != 0)) * align_bs;
}
return offset;
}