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Get rid of _set variables
[fio.git] / verify.c
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1/*
2 * IO verification helpers
3 */
4#include <unistd.h>
5#include <fcntl.h>
6#include <string.h>
7#include <assert.h>
8#include <pthread.h>
9#include <libgen.h>
10
11#include "fio.h"
12#include "verify.h"
13#include "trim.h"
14#include "lib/rand.h"
15#include "lib/hweight.h"
16
17#include "crc/md5.h"
18#include "crc/crc64.h"
19#include "crc/crc32.h"
20#include "crc/crc32c.h"
21#include "crc/crc16.h"
22#include "crc/crc7.h"
23#include "crc/sha256.h"
24#include "crc/sha512.h"
25#include "crc/sha1.h"
26#include "crc/xxhash.h"
27
28static void populate_hdr(struct thread_data *td, struct io_u *io_u,
29 struct verify_header *hdr, unsigned int header_num,
30 unsigned int header_len);
31
32void fill_buffer_pattern(struct thread_data *td, void *p, unsigned int len)
33{
34 fill_pattern(p, len, td->o.buffer_pattern, td->o.buffer_pattern_bytes);
35}
36
37void __fill_buffer(struct thread_options *o, unsigned long seed, void *p,
38 unsigned int len)
39{
40 __fill_random_buf_percentage(seed, p, o->compress_percentage, len, len, o->buffer_pattern, o->buffer_pattern_bytes);
41}
42
43unsigned long fill_buffer(struct thread_data *td, void *p, unsigned int len)
44{
45 struct frand_state *fs = &td->verify_state;
46 struct thread_options *o = &td->o;
47
48 return fill_random_buf_percentage(fs, p, o->compress_percentage, len, len, o->buffer_pattern, o->buffer_pattern_bytes);
49}
50
51void fill_verify_pattern(struct thread_data *td, void *p, unsigned int len,
52 struct io_u *io_u, unsigned long seed, int use_seed)
53{
54 struct thread_options *o = &td->o;
55
56 if (!o->verify_pattern_bytes) {
57 dprint(FD_VERIFY, "fill random bytes len=%u\n", len);
58
59 if (use_seed)
60 __fill_buffer(o, seed, p, len);
61 else
62 io_u->rand_seed = fill_buffer(td, p, len);
63 return;
64 }
65
66 if (io_u->buf_filled_len >= len) {
67 dprint(FD_VERIFY, "using already filled verify pattern b=%d len=%u\n",
68 o->verify_pattern_bytes, len);
69 return;
70 }
71
72 fill_pattern(p, len, o->verify_pattern, o->verify_pattern_bytes);
73 io_u->buf_filled_len = len;
74}
75
76static unsigned int get_hdr_inc(struct thread_data *td, struct io_u *io_u)
77{
78 unsigned int hdr_inc;
79
80 hdr_inc = io_u->buflen;
81 if (td->o.verify_interval && td->o.verify_interval <= io_u->buflen)
82 hdr_inc = td->o.verify_interval;
83
84 return hdr_inc;
85}
86
87static void fill_pattern_headers(struct thread_data *td, struct io_u *io_u,
88 unsigned long seed, int use_seed)
89{
90 unsigned int hdr_inc, header_num;
91 struct verify_header *hdr;
92 void *p = io_u->buf;
93
94 fill_verify_pattern(td, p, io_u->buflen, io_u, seed, use_seed);
95
96 hdr_inc = get_hdr_inc(td, io_u);
97 header_num = 0;
98 for (; p < io_u->buf + io_u->buflen; p += hdr_inc) {
99 hdr = p;
100 populate_hdr(td, io_u, hdr, header_num, hdr_inc);
101 header_num++;
102 }
103}
104
105static void memswp(void *buf1, void *buf2, unsigned int len)
106{
107 char swap[200];
108
109 assert(len <= sizeof(swap));
110
111 memcpy(&swap, buf1, len);
112 memcpy(buf1, buf2, len);
113 memcpy(buf2, &swap, len);
114}
115
116static void hexdump(void *buffer, int len)
117{
118 unsigned char *p = buffer;
119 int i;
120
121 for (i = 0; i < len; i++)
122 log_err("%02x", p[i]);
123 log_err("\n");
124}
125
126/*
127 * Prepare for separation of verify_header and checksum header
128 */
129static inline unsigned int __hdr_size(int verify_type)
130{
131 unsigned int len = 0;
132
133 switch (verify_type) {
134 case VERIFY_NONE:
135 case VERIFY_NULL:
136 len = 0;
137 break;
138 case VERIFY_MD5:
139 len = sizeof(struct vhdr_md5);
140 break;
141 case VERIFY_CRC64:
142 len = sizeof(struct vhdr_crc64);
143 break;
144 case VERIFY_CRC32C:
145 case VERIFY_CRC32:
146 case VERIFY_CRC32C_INTEL:
147 len = sizeof(struct vhdr_crc32);
148 break;
149 case VERIFY_CRC16:
150 len = sizeof(struct vhdr_crc16);
151 break;
152 case VERIFY_CRC7:
153 len = sizeof(struct vhdr_crc7);
154 break;
155 case VERIFY_SHA256:
156 len = sizeof(struct vhdr_sha256);
157 break;
158 case VERIFY_SHA512:
159 len = sizeof(struct vhdr_sha512);
160 break;
161 case VERIFY_XXHASH:
162 len = sizeof(struct vhdr_xxhash);
163 break;
164 case VERIFY_META:
165 len = sizeof(struct vhdr_meta);
166 break;
167 case VERIFY_SHA1:
168 len = sizeof(struct vhdr_sha1);
169 break;
170 case VERIFY_PATTERN:
171 len = 0;
172 break;
173 default:
174 log_err("fio: unknown verify header!\n");
175 assert(0);
176 }
177
178 return len + sizeof(struct verify_header);
179}
180
181static inline unsigned int hdr_size(struct verify_header *hdr)
182{
183 return __hdr_size(hdr->verify_type);
184}
185
186static void *hdr_priv(struct verify_header *hdr)
187{
188 void *priv = hdr;
189
190 return priv + sizeof(struct verify_header);
191}
192
193/*
194 * Verify container, pass info to verify handlers and allow them to
195 * pass info back in case of error
196 */
197struct vcont {
198 /*
199 * Input
200 */
201 struct io_u *io_u;
202 unsigned int hdr_num;
203 struct thread_data *td;
204
205 /*
206 * Output, only valid in case of error
207 */
208 const char *name;
209 void *good_crc;
210 void *bad_crc;
211 unsigned int crc_len;
212};
213
214#define DUMP_BUF_SZ 255
215static int dump_buf_warned;
216
217static void dump_buf(char *buf, unsigned int len, unsigned long long offset,
218 const char *type, struct fio_file *f)
219{
220 char *ptr, fname[DUMP_BUF_SZ];
221 size_t buf_left = DUMP_BUF_SZ;
222 int ret, fd;
223
224 ptr = strdup(f->file_name);
225
226 fname[DUMP_BUF_SZ - 1] = '\0';
227 strncpy(fname, basename(ptr), DUMP_BUF_SZ - 1);
228
229 buf_left -= strlen(fname);
230 if (buf_left <= 0) {
231 if (!dump_buf_warned) {
232 log_err("fio: verify failure dump buffer too small\n");
233 dump_buf_warned = 1;
234 }
235 free(ptr);
236 return;
237 }
238
239 snprintf(fname + strlen(fname), buf_left, ".%llu.%s", offset, type);
240
241 fd = open(fname, O_CREAT | O_TRUNC | O_WRONLY, 0644);
242 if (fd < 0) {
243 perror("open verify buf file");
244 return;
245 }
246
247 while (len) {
248 ret = write(fd, buf, len);
249 if (!ret)
250 break;
251 else if (ret < 0) {
252 perror("write verify buf file");
253 break;
254 }
255 len -= ret;
256 buf += ret;
257 }
258
259 close(fd);
260 log_err(" %s data dumped as %s\n", type, fname);
261 free(ptr);
262}
263
264/*
265 * Dump the contents of the read block and re-generate the correct data
266 * and dump that too.
267 */
268static void dump_verify_buffers(struct verify_header *hdr, struct vcont *vc)
269{
270 struct thread_data *td = vc->td;
271 struct io_u *io_u = vc->io_u;
272 unsigned long hdr_offset;
273 struct io_u dummy;
274 void *buf;
275
276 if (!td->o.verify_dump)
277 return;
278
279 /*
280 * Dump the contents we just read off disk
281 */
282 hdr_offset = vc->hdr_num * hdr->len;
283
284 dump_buf(io_u->buf + hdr_offset, hdr->len, io_u->offset + hdr_offset,
285 "received", vc->io_u->file);
286
287 /*
288 * Allocate a new buf and re-generate the original data
289 */
290 buf = malloc(io_u->buflen);
291 dummy = *io_u;
292 dummy.buf = buf;
293 dummy.rand_seed = hdr->rand_seed;
294 dummy.buf_filled_len = 0;
295 dummy.buflen = io_u->buflen;
296
297 fill_pattern_headers(td, &dummy, hdr->rand_seed, 1);
298
299 dump_buf(buf + hdr_offset, hdr->len, io_u->offset + hdr_offset,
300 "expected", vc->io_u->file);
301 free(buf);
302}
303
304static void log_verify_failure(struct verify_header *hdr, struct vcont *vc)
305{
306 unsigned long long offset;
307
308 offset = vc->io_u->offset;
309 offset += vc->hdr_num * hdr->len;
310 log_err("%.8s: verify failed at file %s offset %llu, length %u\n",
311 vc->name, vc->io_u->file->file_name, offset, hdr->len);
312
313 if (vc->good_crc && vc->bad_crc) {
314 log_err(" Expected CRC: ");
315 hexdump(vc->good_crc, vc->crc_len);
316 log_err(" Received CRC: ");
317 hexdump(vc->bad_crc, vc->crc_len);
318 }
319
320 dump_verify_buffers(hdr, vc);
321}
322
323/*
324 * Return data area 'header_num'
325 */
326static inline void *io_u_verify_off(struct verify_header *hdr, struct vcont *vc)
327{
328 return vc->io_u->buf + vc->hdr_num * hdr->len + hdr_size(hdr);
329}
330
331static int verify_io_u_pattern(struct verify_header *hdr, struct vcont *vc)
332{
333 struct thread_data *td = vc->td;
334 struct io_u *io_u = vc->io_u;
335 char *buf, *pattern;
336 unsigned int header_size = __hdr_size(td->o.verify);
337 unsigned int len, mod, i, size, pattern_size;
338
339 pattern = td->o.verify_pattern;
340 pattern_size = td->o.verify_pattern_bytes;
341 if (pattern_size <= 1)
342 pattern_size = MAX_PATTERN_SIZE;
343 buf = (void *) hdr + header_size;
344 len = get_hdr_inc(td, io_u) - header_size;
345 mod = header_size % pattern_size;
346
347 for (i = 0; i < len; i += size) {
348 size = pattern_size - mod;
349 if (size > (len - i))
350 size = len - i;
351 if (memcmp(buf + i, pattern + mod, size))
352 /* Let the slow compare find the first mismatch byte. */
353 break;
354 mod = 0;
355 }
356
357 for (; i < len; i++) {
358 if (buf[i] != pattern[mod]) {
359 unsigned int bits;
360
361 bits = hweight8(buf[i] ^ pattern[mod]);
362 log_err("fio: got pattern %x, wanted %x. Bad bits %d\n",
363 buf[i], pattern[mod], bits);
364 log_err("fio: bad pattern block offset %u\n", i);
365 dump_verify_buffers(hdr, vc);
366 return EILSEQ;
367 }
368 mod++;
369 if (mod == td->o.verify_pattern_bytes)
370 mod = 0;
371 }
372
373 return 0;
374}
375
376static int verify_io_u_meta(struct verify_header *hdr, struct vcont *vc)
377{
378 struct thread_data *td = vc->td;
379 struct vhdr_meta *vh = hdr_priv(hdr);
380 struct io_u *io_u = vc->io_u;
381 int ret = EILSEQ;
382
383 dprint(FD_VERIFY, "meta verify io_u %p, len %u\n", io_u, hdr->len);
384
385 if (vh->offset == io_u->offset + vc->hdr_num * td->o.verify_interval)
386 ret = 0;
387
388 if (td->o.verify_pattern_bytes)
389 ret |= verify_io_u_pattern(hdr, vc);
390
391 /*
392 * For read-only workloads, the program cannot be certain of the
393 * last numberio written to a block. Checking of numberio will be
394 * done only for workloads that write data. For verify_only,
395 * numberio will be checked in the last iteration when the correct
396 * state of numberio, that would have been written to each block
397 * in a previous run of fio, has been reached.
398 */
399 if ((td_write(td) || td_rw(td)) && (td_min_bs(td) == td_max_bs(td)) &&
400 !td->o.time_based)
401 if (!td->o.verify_only || td->o.loops == 0)
402 if (vh->numberio != io_u->numberio)
403 ret = EILSEQ;
404
405 if (!ret)
406 return 0;
407
408 vc->name = "meta";
409 log_verify_failure(hdr, vc);
410 return ret;
411}
412
413static int verify_io_u_xxhash(struct verify_header *hdr, struct vcont *vc)
414{
415 void *p = io_u_verify_off(hdr, vc);
416 struct vhdr_xxhash *vh = hdr_priv(hdr);
417 uint32_t hash;
418 void *state;
419
420 dprint(FD_VERIFY, "xxhash verify io_u %p, len %u\n", vc->io_u, hdr->len);
421
422 state = XXH32_init(1);
423 XXH32_update(state, p, hdr->len - hdr_size(hdr));
424 hash = XXH32_digest(state);
425
426 if (vh->hash == hash)
427 return 0;
428
429 vc->name = "xxhash";
430 vc->good_crc = &vh->hash;
431 vc->bad_crc = &hash;
432 vc->crc_len = sizeof(hash);
433 log_verify_failure(hdr, vc);
434 return EILSEQ;
435}
436
437static int verify_io_u_sha512(struct verify_header *hdr, struct vcont *vc)
438{
439 void *p = io_u_verify_off(hdr, vc);
440 struct vhdr_sha512 *vh = hdr_priv(hdr);
441 uint8_t sha512[128];
442 struct fio_sha512_ctx sha512_ctx = {
443 .buf = sha512,
444 };
445
446 dprint(FD_VERIFY, "sha512 verify io_u %p, len %u\n", vc->io_u, hdr->len);
447
448 fio_sha512_init(&sha512_ctx);
449 fio_sha512_update(&sha512_ctx, p, hdr->len - hdr_size(hdr));
450
451 if (!memcmp(vh->sha512, sha512_ctx.buf, sizeof(sha512)))
452 return 0;
453
454 vc->name = "sha512";
455 vc->good_crc = vh->sha512;
456 vc->bad_crc = sha512_ctx.buf;
457 vc->crc_len = sizeof(vh->sha512);
458 log_verify_failure(hdr, vc);
459 return EILSEQ;
460}
461
462static int verify_io_u_sha256(struct verify_header *hdr, struct vcont *vc)
463{
464 void *p = io_u_verify_off(hdr, vc);
465 struct vhdr_sha256 *vh = hdr_priv(hdr);
466 uint8_t sha256[64];
467 struct fio_sha256_ctx sha256_ctx = {
468 .buf = sha256,
469 };
470
471 dprint(FD_VERIFY, "sha256 verify io_u %p, len %u\n", vc->io_u, hdr->len);
472
473 fio_sha256_init(&sha256_ctx);
474 fio_sha256_update(&sha256_ctx, p, hdr->len - hdr_size(hdr));
475
476 if (!memcmp(vh->sha256, sha256_ctx.buf, sizeof(sha256)))
477 return 0;
478
479 vc->name = "sha256";
480 vc->good_crc = vh->sha256;
481 vc->bad_crc = sha256_ctx.buf;
482 vc->crc_len = sizeof(vh->sha256);
483 log_verify_failure(hdr, vc);
484 return EILSEQ;
485}
486
487static int verify_io_u_sha1(struct verify_header *hdr, struct vcont *vc)
488{
489 void *p = io_u_verify_off(hdr, vc);
490 struct vhdr_sha1 *vh = hdr_priv(hdr);
491 uint32_t sha1[5];
492 struct fio_sha1_ctx sha1_ctx = {
493 .H = sha1,
494 };
495
496 dprint(FD_VERIFY, "sha1 verify io_u %p, len %u\n", vc->io_u, hdr->len);
497
498 fio_sha1_init(&sha1_ctx);
499 fio_sha1_update(&sha1_ctx, p, hdr->len - hdr_size(hdr));
500
501 if (!memcmp(vh->sha1, sha1_ctx.H, sizeof(sha1)))
502 return 0;
503
504 vc->name = "sha1";
505 vc->good_crc = vh->sha1;
506 vc->bad_crc = sha1_ctx.H;
507 vc->crc_len = sizeof(vh->sha1);
508 log_verify_failure(hdr, vc);
509 return EILSEQ;
510}
511
512static int verify_io_u_crc7(struct verify_header *hdr, struct vcont *vc)
513{
514 void *p = io_u_verify_off(hdr, vc);
515 struct vhdr_crc7 *vh = hdr_priv(hdr);
516 unsigned char c;
517
518 dprint(FD_VERIFY, "crc7 verify io_u %p, len %u\n", vc->io_u, hdr->len);
519
520 c = fio_crc7(p, hdr->len - hdr_size(hdr));
521
522 if (c == vh->crc7)
523 return 0;
524
525 vc->name = "crc7";
526 vc->good_crc = &vh->crc7;
527 vc->bad_crc = &c;
528 vc->crc_len = 1;
529 log_verify_failure(hdr, vc);
530 return EILSEQ;
531}
532
533static int verify_io_u_crc16(struct verify_header *hdr, struct vcont *vc)
534{
535 void *p = io_u_verify_off(hdr, vc);
536 struct vhdr_crc16 *vh = hdr_priv(hdr);
537 unsigned short c;
538
539 dprint(FD_VERIFY, "crc16 verify io_u %p, len %u\n", vc->io_u, hdr->len);
540
541 c = fio_crc16(p, hdr->len - hdr_size(hdr));
542
543 if (c == vh->crc16)
544 return 0;
545
546 vc->name = "crc16";
547 vc->good_crc = &vh->crc16;
548 vc->bad_crc = &c;
549 vc->crc_len = 2;
550 log_verify_failure(hdr, vc);
551 return EILSEQ;
552}
553
554static int verify_io_u_crc64(struct verify_header *hdr, struct vcont *vc)
555{
556 void *p = io_u_verify_off(hdr, vc);
557 struct vhdr_crc64 *vh = hdr_priv(hdr);
558 unsigned long long c;
559
560 dprint(FD_VERIFY, "crc64 verify io_u %p, len %u\n", vc->io_u, hdr->len);
561
562 c = fio_crc64(p, hdr->len - hdr_size(hdr));
563
564 if (c == vh->crc64)
565 return 0;
566
567 vc->name = "crc64";
568 vc->good_crc = &vh->crc64;
569 vc->bad_crc = &c;
570 vc->crc_len = 8;
571 log_verify_failure(hdr, vc);
572 return EILSEQ;
573}
574
575static int verify_io_u_crc32(struct verify_header *hdr, struct vcont *vc)
576{
577 void *p = io_u_verify_off(hdr, vc);
578 struct vhdr_crc32 *vh = hdr_priv(hdr);
579 uint32_t c;
580
581 dprint(FD_VERIFY, "crc32 verify io_u %p, len %u\n", vc->io_u, hdr->len);
582
583 c = fio_crc32(p, hdr->len - hdr_size(hdr));
584
585 if (c == vh->crc32)
586 return 0;
587
588 vc->name = "crc32";
589 vc->good_crc = &vh->crc32;
590 vc->bad_crc = &c;
591 vc->crc_len = 4;
592 log_verify_failure(hdr, vc);
593 return EILSEQ;
594}
595
596static int verify_io_u_crc32c(struct verify_header *hdr, struct vcont *vc)
597{
598 void *p = io_u_verify_off(hdr, vc);
599 struct vhdr_crc32 *vh = hdr_priv(hdr);
600 uint32_t c;
601
602 dprint(FD_VERIFY, "crc32c verify io_u %p, len %u\n", vc->io_u, hdr->len);
603
604 c = fio_crc32c(p, hdr->len - hdr_size(hdr));
605
606 if (c == vh->crc32)
607 return 0;
608
609 vc->name = "crc32c";
610 vc->good_crc = &vh->crc32;
611 vc->bad_crc = &c;
612 vc->crc_len = 4;
613 log_verify_failure(hdr, vc);
614 return EILSEQ;
615}
616
617static int verify_io_u_md5(struct verify_header *hdr, struct vcont *vc)
618{
619 void *p = io_u_verify_off(hdr, vc);
620 struct vhdr_md5 *vh = hdr_priv(hdr);
621 uint32_t hash[MD5_HASH_WORDS];
622 struct fio_md5_ctx md5_ctx = {
623 .hash = hash,
624 };
625
626 dprint(FD_VERIFY, "md5 verify io_u %p, len %u\n", vc->io_u, hdr->len);
627
628 fio_md5_init(&md5_ctx);
629 fio_md5_update(&md5_ctx, p, hdr->len - hdr_size(hdr));
630
631 if (!memcmp(vh->md5_digest, md5_ctx.hash, sizeof(hash)))
632 return 0;
633
634 vc->name = "md5";
635 vc->good_crc = vh->md5_digest;
636 vc->bad_crc = md5_ctx.hash;
637 vc->crc_len = sizeof(hash);
638 log_verify_failure(hdr, vc);
639 return EILSEQ;
640}
641
642/*
643 * Push IO verification to a separate thread
644 */
645int verify_io_u_async(struct thread_data *td, struct io_u **io_u_ptr)
646{
647 struct io_u *io_u = *io_u_ptr;
648
649 pthread_mutex_lock(&td->io_u_lock);
650
651 if (io_u->file)
652 put_file_log(td, io_u->file);
653
654 if (io_u->flags & IO_U_F_IN_CUR_DEPTH) {
655 td->cur_depth--;
656 io_u->flags &= ~IO_U_F_IN_CUR_DEPTH;
657 }
658 flist_add_tail(&io_u->verify_list, &td->verify_list);
659 *io_u_ptr = NULL;
660 pthread_mutex_unlock(&td->io_u_lock);
661
662 pthread_cond_signal(&td->verify_cond);
663 return 0;
664}
665
666static int verify_trimmed_io_u(struct thread_data *td, struct io_u *io_u)
667{
668 static char zero_buf[1024];
669 unsigned int this_len, len;
670 int ret = 0;
671 void *p;
672
673 if (!td->o.trim_zero)
674 return 0;
675
676 len = io_u->buflen;
677 p = io_u->buf;
678 do {
679 this_len = sizeof(zero_buf);
680 if (this_len > len)
681 this_len = len;
682 if (memcmp(p, zero_buf, this_len)) {
683 ret = EILSEQ;
684 break;
685 }
686 len -= this_len;
687 p += this_len;
688 } while (len);
689
690 if (!ret)
691 return 0;
692
693 log_err("trim: verify failed at file %s offset %llu, length %lu"
694 ", block offset %lu\n",
695 io_u->file->file_name, io_u->offset, io_u->buflen,
696 (unsigned long) (p - io_u->buf));
697 return ret;
698}
699
700static int verify_header(struct io_u *io_u, struct verify_header *hdr,
701 unsigned int hdr_num, unsigned int hdr_len)
702{
703 void *p = hdr;
704 uint32_t crc;
705
706 if (hdr->magic != FIO_HDR_MAGIC) {
707 log_err("verify: bad magic header %x, wanted %x",
708 hdr->magic, FIO_HDR_MAGIC);
709 goto err;
710 }
711 if (hdr->len != hdr_len) {
712 log_err("verify: bad header length %u, wanted %u",
713 hdr->len, hdr_len);
714 goto err;
715 }
716 if (hdr->rand_seed != io_u->rand_seed) {
717 log_err("verify: bad header rand_seed %"PRIu64
718 ", wanted %"PRIu64,
719 hdr->rand_seed, io_u->rand_seed);
720 goto err;
721 }
722
723 crc = fio_crc32c(p, offsetof(struct verify_header, crc32));
724 if (crc != hdr->crc32) {
725 log_err("verify: bad header crc %x, calculated %x",
726 hdr->crc32, crc);
727 goto err;
728 }
729 return 0;
730
731err:
732 log_err(" at file %s offset %llu, length %u\n",
733 io_u->file->file_name,
734 io_u->offset + hdr_num * hdr_len, hdr_len);
735 return EILSEQ;
736}
737
738int verify_io_u(struct thread_data *td, struct io_u **io_u_ptr)
739{
740 struct verify_header *hdr;
741 struct io_u *io_u = *io_u_ptr;
742 unsigned int header_size, hdr_inc, hdr_num = 0;
743 void *p;
744 int ret;
745
746 if (td->o.verify == VERIFY_NULL || io_u->ddir != DDIR_READ)
747 return 0;
748 /*
749 * If the IO engine is faking IO (like null), then just pretend
750 * we verified everything.
751 */
752 if (td->io_ops->flags & FIO_FAKEIO)
753 return 0;
754
755 if (io_u->flags & IO_U_F_TRIMMED) {
756 ret = verify_trimmed_io_u(td, io_u);
757 goto done;
758 }
759
760 hdr_inc = get_hdr_inc(td, io_u);
761
762 ret = 0;
763 for (p = io_u->buf; p < io_u->buf + io_u->buflen;
764 p += hdr_inc, hdr_num++) {
765 struct vcont vc = {
766 .io_u = io_u,
767 .hdr_num = hdr_num,
768 .td = td,
769 };
770 unsigned int verify_type;
771
772 if (ret && td->o.verify_fatal)
773 break;
774
775 header_size = __hdr_size(td->o.verify);
776 if (td->o.verify_offset)
777 memswp(p, p + td->o.verify_offset, header_size);
778 hdr = p;
779
780 /*
781 * Make rand_seed check pass when have verifysort or
782 * verify_backlog.
783 */
784 if (td->o.verifysort || (td->flags & TD_F_VER_BACKLOG))
785 io_u->rand_seed = hdr->rand_seed;
786
787 ret = verify_header(io_u, hdr, hdr_num, hdr_inc);
788 if (ret)
789 return ret;
790
791 if (td->o.verify != VERIFY_NONE)
792 verify_type = td->o.verify;
793 else
794 verify_type = hdr->verify_type;
795
796 switch (verify_type) {
797 case VERIFY_MD5:
798 ret = verify_io_u_md5(hdr, &vc);
799 break;
800 case VERIFY_CRC64:
801 ret = verify_io_u_crc64(hdr, &vc);
802 break;
803 case VERIFY_CRC32C:
804 case VERIFY_CRC32C_INTEL:
805 ret = verify_io_u_crc32c(hdr, &vc);
806 break;
807 case VERIFY_CRC32:
808 ret = verify_io_u_crc32(hdr, &vc);
809 break;
810 case VERIFY_CRC16:
811 ret = verify_io_u_crc16(hdr, &vc);
812 break;
813 case VERIFY_CRC7:
814 ret = verify_io_u_crc7(hdr, &vc);
815 break;
816 case VERIFY_SHA256:
817 ret = verify_io_u_sha256(hdr, &vc);
818 break;
819 case VERIFY_SHA512:
820 ret = verify_io_u_sha512(hdr, &vc);
821 break;
822 case VERIFY_XXHASH:
823 ret = verify_io_u_xxhash(hdr, &vc);
824 break;
825 case VERIFY_META:
826 ret = verify_io_u_meta(hdr, &vc);
827 break;
828 case VERIFY_SHA1:
829 ret = verify_io_u_sha1(hdr, &vc);
830 break;
831 case VERIFY_PATTERN:
832 ret = verify_io_u_pattern(hdr, &vc);
833 break;
834 default:
835 log_err("Bad verify type %u\n", hdr->verify_type);
836 ret = EINVAL;
837 }
838
839 if (ret && verify_type != hdr->verify_type)
840 log_err("fio: verify type mismatch (%u media, %u given)\n",
841 hdr->verify_type, verify_type);
842 }
843
844done:
845 if (ret && td->o.verify_fatal)
846 fio_mark_td_terminate(td);
847
848 return ret;
849}
850
851static void fill_meta(struct verify_header *hdr, struct thread_data *td,
852 struct io_u *io_u, unsigned int header_num)
853{
854 struct vhdr_meta *vh = hdr_priv(hdr);
855
856 vh->thread = td->thread_number;
857
858 vh->time_sec = io_u->start_time.tv_sec;
859 vh->time_usec = io_u->start_time.tv_usec;
860
861 vh->numberio = io_u->numberio;
862
863 vh->offset = io_u->offset + header_num * td->o.verify_interval;
864}
865
866static void fill_xxhash(struct verify_header *hdr, void *p, unsigned int len)
867{
868 struct vhdr_xxhash *vh = hdr_priv(hdr);
869 void *state;
870
871 state = XXH32_init(1);
872 XXH32_update(state, p, len);
873 vh->hash = XXH32_digest(state);
874}
875
876static void fill_sha512(struct verify_header *hdr, void *p, unsigned int len)
877{
878 struct vhdr_sha512 *vh = hdr_priv(hdr);
879 struct fio_sha512_ctx sha512_ctx = {
880 .buf = vh->sha512,
881 };
882
883 fio_sha512_init(&sha512_ctx);
884 fio_sha512_update(&sha512_ctx, p, len);
885}
886
887static void fill_sha256(struct verify_header *hdr, void *p, unsigned int len)
888{
889 struct vhdr_sha256 *vh = hdr_priv(hdr);
890 struct fio_sha256_ctx sha256_ctx = {
891 .buf = vh->sha256,
892 };
893
894 fio_sha256_init(&sha256_ctx);
895 fio_sha256_update(&sha256_ctx, p, len);
896}
897
898static void fill_sha1(struct verify_header *hdr, void *p, unsigned int len)
899{
900 struct vhdr_sha1 *vh = hdr_priv(hdr);
901 struct fio_sha1_ctx sha1_ctx = {
902 .H = vh->sha1,
903 };
904
905 fio_sha1_init(&sha1_ctx);
906 fio_sha1_update(&sha1_ctx, p, len);
907}
908
909static void fill_crc7(struct verify_header *hdr, void *p, unsigned int len)
910{
911 struct vhdr_crc7 *vh = hdr_priv(hdr);
912
913 vh->crc7 = fio_crc7(p, len);
914}
915
916static void fill_crc16(struct verify_header *hdr, void *p, unsigned int len)
917{
918 struct vhdr_crc16 *vh = hdr_priv(hdr);
919
920 vh->crc16 = fio_crc16(p, len);
921}
922
923static void fill_crc32(struct verify_header *hdr, void *p, unsigned int len)
924{
925 struct vhdr_crc32 *vh = hdr_priv(hdr);
926
927 vh->crc32 = fio_crc32(p, len);
928}
929
930static void fill_crc32c(struct verify_header *hdr, void *p, unsigned int len)
931{
932 struct vhdr_crc32 *vh = hdr_priv(hdr);
933
934 vh->crc32 = fio_crc32c(p, len);
935}
936
937static void fill_crc64(struct verify_header *hdr, void *p, unsigned int len)
938{
939 struct vhdr_crc64 *vh = hdr_priv(hdr);
940
941 vh->crc64 = fio_crc64(p, len);
942}
943
944static void fill_md5(struct verify_header *hdr, void *p, unsigned int len)
945{
946 struct vhdr_md5 *vh = hdr_priv(hdr);
947 struct fio_md5_ctx md5_ctx = {
948 .hash = (uint32_t *) vh->md5_digest,
949 };
950
951 fio_md5_init(&md5_ctx);
952 fio_md5_update(&md5_ctx, p, len);
953}
954
955static void populate_hdr(struct thread_data *td, struct io_u *io_u,
956 struct verify_header *hdr, unsigned int header_num,
957 unsigned int header_len)
958{
959 unsigned int data_len;
960 void *data, *p;
961
962 p = (void *) hdr;
963
964 hdr->magic = FIO_HDR_MAGIC;
965 hdr->verify_type = td->o.verify;
966 hdr->len = header_len;
967 hdr->rand_seed = io_u->rand_seed;
968 hdr->crc32 = fio_crc32c(p, offsetof(struct verify_header, crc32));
969
970 data_len = header_len - hdr_size(hdr);
971
972 data = p + hdr_size(hdr);
973 switch (td->o.verify) {
974 case VERIFY_MD5:
975 dprint(FD_VERIFY, "fill md5 io_u %p, len %u\n",
976 io_u, hdr->len);
977 fill_md5(hdr, data, data_len);
978 break;
979 case VERIFY_CRC64:
980 dprint(FD_VERIFY, "fill crc64 io_u %p, len %u\n",
981 io_u, hdr->len);
982 fill_crc64(hdr, data, data_len);
983 break;
984 case VERIFY_CRC32C:
985 case VERIFY_CRC32C_INTEL:
986 dprint(FD_VERIFY, "fill crc32c io_u %p, len %u\n",
987 io_u, hdr->len);
988 fill_crc32c(hdr, data, data_len);
989 break;
990 case VERIFY_CRC32:
991 dprint(FD_VERIFY, "fill crc32 io_u %p, len %u\n",
992 io_u, hdr->len);
993 fill_crc32(hdr, data, data_len);
994 break;
995 case VERIFY_CRC16:
996 dprint(FD_VERIFY, "fill crc16 io_u %p, len %u\n",
997 io_u, hdr->len);
998 fill_crc16(hdr, data, data_len);
999 break;
1000 case VERIFY_CRC7:
1001 dprint(FD_VERIFY, "fill crc7 io_u %p, len %u\n",
1002 io_u, hdr->len);
1003 fill_crc7(hdr, data, data_len);
1004 break;
1005 case VERIFY_SHA256:
1006 dprint(FD_VERIFY, "fill sha256 io_u %p, len %u\n",
1007 io_u, hdr->len);
1008 fill_sha256(hdr, data, data_len);
1009 break;
1010 case VERIFY_SHA512:
1011 dprint(FD_VERIFY, "fill sha512 io_u %p, len %u\n",
1012 io_u, hdr->len);
1013 fill_sha512(hdr, data, data_len);
1014 break;
1015 case VERIFY_XXHASH:
1016 dprint(FD_VERIFY, "fill xxhash io_u %p, len %u\n",
1017 io_u, hdr->len);
1018 fill_xxhash(hdr, data, data_len);
1019 break;
1020 case VERIFY_META:
1021 dprint(FD_VERIFY, "fill meta io_u %p, len %u\n",
1022 io_u, hdr->len);
1023 fill_meta(hdr, td, io_u, header_num);
1024 break;
1025 case VERIFY_SHA1:
1026 dprint(FD_VERIFY, "fill sha1 io_u %p, len %u\n",
1027 io_u, hdr->len);
1028 fill_sha1(hdr, data, data_len);
1029 break;
1030 case VERIFY_PATTERN:
1031 /* nothing to do here */
1032 break;
1033 default:
1034 log_err("fio: bad verify type: %d\n", td->o.verify);
1035 assert(0);
1036 }
1037 if (td->o.verify_offset)
1038 memswp(p, p + td->o.verify_offset, hdr_size(hdr));
1039}
1040
1041/*
1042 * fill body of io_u->buf with random data and add a header with the
1043 * checksum of choice
1044 */
1045void populate_verify_io_u(struct thread_data *td, struct io_u *io_u)
1046{
1047 if (td->o.verify == VERIFY_NULL)
1048 return;
1049
1050 io_u->numberio = td->io_issues[io_u->ddir];
1051
1052 fill_pattern_headers(td, io_u, 0, 0);
1053}
1054
1055int get_next_verify(struct thread_data *td, struct io_u *io_u)
1056{
1057 struct io_piece *ipo = NULL;
1058
1059 /*
1060 * this io_u is from a requeue, we already filled the offsets
1061 */
1062 if (io_u->file)
1063 return 0;
1064
1065 if (!RB_EMPTY_ROOT(&td->io_hist_tree)) {
1066 struct rb_node *n = rb_first(&td->io_hist_tree);
1067
1068 ipo = rb_entry(n, struct io_piece, rb_node);
1069
1070 /*
1071 * Ensure that the associated IO has completed
1072 */
1073 read_barrier();
1074 if (ipo->flags & IP_F_IN_FLIGHT)
1075 goto nothing;
1076
1077 rb_erase(n, &td->io_hist_tree);
1078 assert(ipo->flags & IP_F_ONRB);
1079 ipo->flags &= ~IP_F_ONRB;
1080 } else if (!flist_empty(&td->io_hist_list)) {
1081 ipo = flist_first_entry(&td->io_hist_list, struct io_piece, list);
1082
1083 /*
1084 * Ensure that the associated IO has completed
1085 */
1086 read_barrier();
1087 if (ipo->flags & IP_F_IN_FLIGHT)
1088 goto nothing;
1089
1090 flist_del(&ipo->list);
1091 assert(ipo->flags & IP_F_ONLIST);
1092 ipo->flags &= ~IP_F_ONLIST;
1093 }
1094
1095 if (ipo) {
1096 td->io_hist_len--;
1097
1098 io_u->offset = ipo->offset;
1099 io_u->buflen = ipo->len;
1100 io_u->numberio = ipo->numberio;
1101 io_u->file = ipo->file;
1102 io_u->flags |= IO_U_F_VER_LIST;
1103
1104 if (ipo->flags & IP_F_TRIMMED)
1105 io_u->flags |= IO_U_F_TRIMMED;
1106
1107 if (!fio_file_open(io_u->file)) {
1108 int r = td_io_open_file(td, io_u->file);
1109
1110 if (r) {
1111 dprint(FD_VERIFY, "failed file %s open\n",
1112 io_u->file->file_name);
1113 return 1;
1114 }
1115 }
1116
1117 get_file(ipo->file);
1118 assert(fio_file_open(io_u->file));
1119 io_u->ddir = DDIR_READ;
1120 io_u->xfer_buf = io_u->buf;
1121 io_u->xfer_buflen = io_u->buflen;
1122
1123 remove_trim_entry(td, ipo);
1124 free(ipo);
1125 dprint(FD_VERIFY, "get_next_verify: ret io_u %p\n", io_u);
1126
1127 if (!td->o.verify_pattern_bytes) {
1128 io_u->rand_seed = __rand(&td->verify_state);
1129 if (sizeof(int) != sizeof(long *))
1130 io_u->rand_seed *= __rand(&td->verify_state);
1131 }
1132 return 0;
1133 }
1134
1135nothing:
1136 dprint(FD_VERIFY, "get_next_verify: empty\n");
1137 return 1;
1138}
1139
1140void fio_verify_init(struct thread_data *td)
1141{
1142 if (td->o.verify == VERIFY_CRC32C_INTEL ||
1143 td->o.verify == VERIFY_CRC32C) {
1144 crc32c_intel_probe();
1145 }
1146}
1147
1148static void *verify_async_thread(void *data)
1149{
1150 struct thread_data *td = data;
1151 struct io_u *io_u;
1152 int ret = 0;
1153
1154 if (fio_option_is_set(&td->o, verify_cpumask) &&
1155 fio_setaffinity(td->pid, td->o.verify_cpumask)) {
1156 log_err("fio: failed setting verify thread affinity\n");
1157 goto done;
1158 }
1159
1160 do {
1161 FLIST_HEAD(list);
1162
1163 read_barrier();
1164 if (td->verify_thread_exit)
1165 break;
1166
1167 pthread_mutex_lock(&td->io_u_lock);
1168
1169 while (flist_empty(&td->verify_list) &&
1170 !td->verify_thread_exit) {
1171 ret = pthread_cond_wait(&td->verify_cond,
1172 &td->io_u_lock);
1173 if (ret) {
1174 pthread_mutex_unlock(&td->io_u_lock);
1175 break;
1176 }
1177 }
1178
1179 flist_splice_init(&td->verify_list, &list);
1180 pthread_mutex_unlock(&td->io_u_lock);
1181
1182 if (flist_empty(&list))
1183 continue;
1184
1185 while (!flist_empty(&list)) {
1186 io_u = flist_first_entry(&list, struct io_u, verify_list);
1187 flist_del_init(&io_u->verify_list);
1188
1189 io_u->flags |= IO_U_F_NO_FILE_PUT;
1190 ret = verify_io_u(td, &io_u);
1191
1192 put_io_u(td, io_u);
1193 if (!ret)
1194 continue;
1195 if (td_non_fatal_error(td, ERROR_TYPE_VERIFY_BIT, ret)) {
1196 update_error_count(td, ret);
1197 td_clear_error(td);
1198 ret = 0;
1199 }
1200 }
1201 } while (!ret);
1202
1203 if (ret) {
1204 td_verror(td, ret, "async_verify");
1205 if (td->o.verify_fatal)
1206 fio_mark_td_terminate(td);
1207 }
1208
1209done:
1210 pthread_mutex_lock(&td->io_u_lock);
1211 td->nr_verify_threads--;
1212 pthread_mutex_unlock(&td->io_u_lock);
1213
1214 pthread_cond_signal(&td->free_cond);
1215 return NULL;
1216}
1217
1218int verify_async_init(struct thread_data *td)
1219{
1220 int i, ret;
1221 pthread_attr_t attr;
1222
1223 pthread_attr_init(&attr);
1224 pthread_attr_setstacksize(&attr, PTHREAD_STACK_MIN);
1225
1226 td->verify_thread_exit = 0;
1227
1228 td->verify_threads = malloc(sizeof(pthread_t) * td->o.verify_async);
1229 for (i = 0; i < td->o.verify_async; i++) {
1230 ret = pthread_create(&td->verify_threads[i], &attr,
1231 verify_async_thread, td);
1232 if (ret) {
1233 log_err("fio: async verify creation failed: %s\n",
1234 strerror(ret));
1235 break;
1236 }
1237 ret = pthread_detach(td->verify_threads[i]);
1238 if (ret) {
1239 log_err("fio: async verify thread detach failed: %s\n",
1240 strerror(ret));
1241 break;
1242 }
1243 td->nr_verify_threads++;
1244 }
1245
1246 pthread_attr_destroy(&attr);
1247
1248 if (i != td->o.verify_async) {
1249 log_err("fio: only %d verify threads started, exiting\n", i);
1250 td->verify_thread_exit = 1;
1251 write_barrier();
1252 pthread_cond_broadcast(&td->verify_cond);
1253 return 1;
1254 }
1255
1256 return 0;
1257}
1258
1259void verify_async_exit(struct thread_data *td)
1260{
1261 td->verify_thread_exit = 1;
1262 write_barrier();
1263 pthread_cond_broadcast(&td->verify_cond);
1264
1265 pthread_mutex_lock(&td->io_u_lock);
1266
1267 while (td->nr_verify_threads)
1268 pthread_cond_wait(&td->free_cond, &td->io_u_lock);
1269
1270 pthread_mutex_unlock(&td->io_u_lock);
1271 free(td->verify_threads);
1272 td->verify_threads = NULL;
1273}
1274
1275struct all_io_list *get_all_io_list(int save_mask, size_t *sz)
1276{
1277 struct all_io_list *rep;
1278 struct thread_data *td;
1279 size_t depth;
1280 void *next;
1281 int i, nr;
1282
1283 compiletime_assert(sizeof(struct all_io_list) == 8, "all_io_list");
1284
1285 /*
1286 * Calculate reply space needed. We need one 'io_state' per thread,
1287 * and the size will vary depending on depth.
1288 */
1289 depth = 0;
1290 nr = 0;
1291 for_each_td(td, i) {
1292 if (save_mask != IO_LIST_ALL && (i + 1) != save_mask)
1293 continue;
1294 td->stop_io = 1;
1295 td->flags |= TD_F_VSTATE_SAVED;
1296 depth += td->o.iodepth;
1297 nr++;
1298 }
1299
1300 if (!nr)
1301 return NULL;
1302
1303 *sz = sizeof(*rep);
1304 *sz += nr * sizeof(struct thread_io_list);
1305 *sz += depth * sizeof(uint64_t);
1306 rep = malloc(*sz);
1307
1308 rep->threads = cpu_to_le64((uint64_t) nr);
1309
1310 next = &rep->state[0];
1311 for_each_td(td, i) {
1312 struct thread_io_list *s = next;
1313 unsigned int comps;
1314
1315 if (save_mask != IO_LIST_ALL && (i + 1) != save_mask)
1316 continue;
1317
1318 if (td->last_write_comp) {
1319 int j, k;
1320
1321 if (td->io_blocks[DDIR_WRITE] < td->o.iodepth)
1322 comps = td->io_blocks[DDIR_WRITE];
1323 else
1324 comps = td->o.iodepth;
1325
1326 k = td->last_write_idx - 1;
1327 for (j = 0; j < comps; j++) {
1328 if (k == -1)
1329 k = td->o.iodepth - 1;
1330 s->offsets[j] = cpu_to_le64(td->last_write_comp[k]);
1331 k--;
1332 }
1333 } else
1334 comps = 0;
1335
1336 s->no_comps = cpu_to_le64((uint64_t) comps);
1337 s->depth = cpu_to_le64((uint64_t) td->o.iodepth);
1338 s->numberio = cpu_to_le64((uint64_t) td->io_issues[DDIR_WRITE]);
1339 s->index = cpu_to_le64((uint64_t) i);
1340 s->rand.s[0] = cpu_to_le32(td->random_state.s1);
1341 s->rand.s[1] = cpu_to_le32(td->random_state.s2);
1342 s->rand.s[2] = cpu_to_le32(td->random_state.s3);
1343 s->rand.s[3] = 0;
1344 strncpy((char *) s->name, td->o.name, sizeof(s->name));
1345 next = io_list_next(s);
1346 }
1347
1348 return rep;
1349}
1350
1351static int open_state_file(const char *name, const char *prefix, int num,
1352 int for_write)
1353{
1354 char out[64];
1355 int flags;
1356 int fd;
1357
1358 if (for_write)
1359 flags = O_CREAT | O_TRUNC | O_WRONLY | O_SYNC;
1360 else
1361 flags = O_RDONLY;
1362
1363 verify_state_gen_name(out, sizeof(out), name, prefix, num);
1364
1365 fd = open(out, flags, 0644);
1366 if (fd == -1) {
1367 perror("fio: open state file");
1368 return -1;
1369 }
1370
1371 return fd;
1372}
1373
1374static int write_thread_list_state(struct thread_io_list *s,
1375 const char *prefix)
1376{
1377 struct verify_state_hdr hdr;
1378 uint64_t crc;
1379 ssize_t ret;
1380 int fd;
1381
1382 fd = open_state_file((const char *) s->name, prefix, s->index, 1);
1383 if (fd == -1)
1384 return 1;
1385
1386 crc = fio_crc32c((void *)s, thread_io_list_sz(s));
1387
1388 hdr.version = cpu_to_le64((uint64_t) VSTATE_HDR_VERSION);
1389 hdr.size = cpu_to_le64((uint64_t) thread_io_list_sz(s));
1390 hdr.crc = cpu_to_le64(crc);
1391 ret = write(fd, &hdr, sizeof(hdr));
1392 if (ret != sizeof(hdr))
1393 goto write_fail;
1394
1395 ret = write(fd, s, thread_io_list_sz(s));
1396 if (ret != thread_io_list_sz(s)) {
1397write_fail:
1398 if (ret < 0)
1399 perror("fio: write state file");
1400 log_err("fio: failed to write state file\n");
1401 ret = 1;
1402 } else
1403 ret = 0;
1404
1405 close(fd);
1406 return ret;
1407}
1408
1409void __verify_save_state(struct all_io_list *state, const char *prefix)
1410{
1411 struct thread_io_list *s = &state->state[0];
1412 unsigned int i;
1413
1414 for (i = 0; i < le64_to_cpu(state->threads); i++) {
1415 write_thread_list_state(s, prefix);
1416 s = io_list_next(s);
1417 }
1418}
1419
1420void verify_save_state(void)
1421{
1422 struct all_io_list *state;
1423 size_t sz;
1424
1425 state = get_all_io_list(IO_LIST_ALL, &sz);
1426 if (state) {
1427 __verify_save_state(state, "local");
1428 free(state);
1429 }
1430}
1431
1432void verify_free_state(struct thread_data *td)
1433{
1434 if (td->vstate)
1435 free(td->vstate);
1436}
1437
1438void verify_convert_assign_state(struct thread_data *td,
1439 struct thread_io_list *s)
1440{
1441 int i;
1442
1443 s->no_comps = le64_to_cpu(s->no_comps);
1444 s->depth = le64_to_cpu(s->depth);
1445 s->numberio = le64_to_cpu(s->numberio);
1446 for (i = 0; i < 4; i++)
1447 s->rand.s[i] = le32_to_cpu(s->rand.s[i]);
1448 for (i = 0; i < s->no_comps; i++)
1449 s->offsets[i] = le64_to_cpu(s->offsets[i]);
1450
1451 td->vstate = s;
1452}
1453
1454int verify_state_hdr(struct verify_state_hdr *hdr, struct thread_io_list *s)
1455{
1456 uint64_t crc;
1457
1458 hdr->version = le64_to_cpu(hdr->version);
1459 hdr->size = le64_to_cpu(hdr->size);
1460 hdr->crc = le64_to_cpu(hdr->crc);
1461
1462 if (hdr->version != VSTATE_HDR_VERSION)
1463 return 1;
1464
1465 crc = fio_crc32c((void *)s, hdr->size);
1466 if (crc != hdr->crc)
1467 return 1;
1468
1469 return 0;
1470}
1471
1472int verify_load_state(struct thread_data *td, const char *prefix)
1473{
1474 struct thread_io_list *s = NULL;
1475 struct verify_state_hdr hdr;
1476 uint64_t crc;
1477 ssize_t ret;
1478 int fd;
1479
1480 if (!td->o.verify_state)
1481 return 0;
1482
1483 fd = open_state_file(td->o.name, prefix, td->thread_number - 1, 0);
1484 if (fd == -1)
1485 return 1;
1486
1487 ret = read(fd, &hdr, sizeof(hdr));
1488 if (ret != sizeof(hdr)) {
1489 if (ret < 0)
1490 td_verror(td, errno, "read verify state hdr");
1491 log_err("fio: failed reading verify state header\n");
1492 goto err;
1493 }
1494
1495 hdr.version = le64_to_cpu(hdr.version);
1496 hdr.size = le64_to_cpu(hdr.size);
1497 hdr.crc = le64_to_cpu(hdr.crc);
1498
1499 if (hdr.version != VSTATE_HDR_VERSION) {
1500 log_err("fio: bad version in verify state header\n");
1501 goto err;
1502 }
1503
1504 s = malloc(hdr.size);
1505 ret = read(fd, s, hdr.size);
1506 if (ret != hdr.size) {
1507 if (ret < 0)
1508 td_verror(td, errno, "read verify state");
1509 log_err("fio: failed reading verity state\n");
1510 goto err;
1511 }
1512
1513 crc = fio_crc32c((void *)s, hdr.size);
1514 if (crc != hdr.crc) {
1515 log_err("fio: verify state is corrupt\n");
1516 goto err;
1517 }
1518
1519 close(fd);
1520
1521 verify_convert_assign_state(td, s);
1522 return 0;
1523err:
1524 if (s)
1525 free(s);
1526 close(fd);
1527 return 1;
1528}
1529
1530/*
1531 * Use the loaded verify state to know when to stop doing verification
1532 */
1533int verify_state_should_stop(struct thread_data *td, struct io_u *io_u)
1534{
1535 struct thread_io_list *s = td->vstate;
1536 int i;
1537
1538 if (!s)
1539 return 0;
1540
1541 /*
1542 * If we're not into the window of issues - depth yet, continue
1543 */
1544 if (td->io_blocks[DDIR_READ] < s->depth ||
1545 s->numberio - td->io_blocks[DDIR_READ] > s->depth)
1546 return 0;
1547
1548 /*
1549 * We're in the window of having to check if this io was
1550 * completed or not. If the IO was seen as completed, then
1551 * lets verify it.
1552 */
1553 for (i = 0; i < s->no_comps; i++)
1554 if (io_u->offset == s->offsets[i])
1555 return 0;
1556
1557 /*
1558 * Not found, we have to stop
1559 */
1560 return 1;
1561}
fio - Flexible IO Tester