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Add option for specifically setting buffer contents
[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
27static void populate_hdr(struct thread_data *td, struct io_u *io_u,
28 struct verify_header *hdr, unsigned int header_num,
29 unsigned int header_len);
30
31static void fill_pattern(struct thread_data *td, void *p, unsigned int len,
32 char *pattern, unsigned int pattern_bytes)
33{
34 switch (pattern_bytes) {
35 case 0:
36 assert(0);
37 break;
38 case 1:
39 dprint(FD_VERIFY, "fill verify pattern b=0 len=%u\n", len);
40 memset(p, pattern[0], len);
41 break;
42 default: {
43 unsigned int i = 0, size = 0;
44 unsigned char *b = p;
45
46 dprint(FD_VERIFY, "fill verify pattern b=%d len=%u\n",
47 pattern_bytes, len);
48
49 while (i < len) {
50 size = pattern_bytes;
51 if (size > (len - i))
52 size = len - i;
53 memcpy(b+i, pattern, size);
54 i += size;
55 }
56 break;
57 }
58 }
59}
60
61void fill_buffer_pattern(struct thread_data *td, void *p, unsigned int len)
62{
63 fill_pattern(td, p, len, td->o.buffer_pattern, td->o.buffer_pattern_bytes);
64}
65
66void fill_verify_pattern(struct thread_data *td, void *p, unsigned int len,
67 struct io_u *io_u, unsigned long seed, int use_seed)
68{
69 if (!td->o.verify_pattern_bytes) {
70 dprint(FD_VERIFY, "fill random bytes len=%u\n", len);
71
72 if (use_seed)
73 __fill_random_buf(p, len, seed);
74 else
75 io_u->rand_seed = fill_random_buf(&td->buf_state, p, len);
76 return;
77 }
78
79 if (io_u->buf_filled_len >= len) {
80 dprint(FD_VERIFY, "using already filled verify pattern b=%d len=%u\n",
81 td->o.verify_pattern_bytes, len);
82 return;
83 }
84
85 fill_pattern(td, p, len, td->o.verify_pattern, td->o.verify_pattern_bytes);
86
87 io_u->buf_filled_len = len;
88}
89
90static unsigned int get_hdr_inc(struct thread_data *td, struct io_u *io_u)
91{
92 unsigned int hdr_inc;
93
94 hdr_inc = io_u->buflen;
95 if (td->o.verify_interval && td->o.verify_interval <= io_u->buflen)
96 hdr_inc = td->o.verify_interval;
97
98 return hdr_inc;
99}
100
101static void fill_pattern_headers(struct thread_data *td, struct io_u *io_u,
102 unsigned long seed, int use_seed)
103{
104 unsigned int hdr_inc, header_num;
105 struct verify_header *hdr;
106 void *p = io_u->buf;
107
108 fill_verify_pattern(td, p, io_u->buflen, io_u, seed, use_seed);
109
110 hdr_inc = get_hdr_inc(td, io_u);
111 header_num = 0;
112 for (; p < io_u->buf + io_u->buflen; p += hdr_inc) {
113 hdr = p;
114 populate_hdr(td, io_u, hdr, header_num, hdr_inc);
115 header_num++;
116 }
117}
118
119static void memswp(void *buf1, void *buf2, unsigned int len)
120{
121 char swap[200];
122
123 assert(len <= sizeof(swap));
124
125 memcpy(&swap, buf1, len);
126 memcpy(buf1, buf2, len);
127 memcpy(buf2, &swap, len);
128}
129
130static void hexdump(void *buffer, int len)
131{
132 unsigned char *p = buffer;
133 int i;
134
135 for (i = 0; i < len; i++)
136 log_err("%02x", p[i]);
137 log_err("\n");
138}
139
140/*
141 * Prepare for separation of verify_header and checksum header
142 */
143static inline unsigned int __hdr_size(int verify_type)
144{
145 unsigned int len = 0;
146
147 switch (verify_type) {
148 case VERIFY_NONE:
149 case VERIFY_NULL:
150 len = 0;
151 break;
152 case VERIFY_MD5:
153 len = sizeof(struct vhdr_md5);
154 break;
155 case VERIFY_CRC64:
156 len = sizeof(struct vhdr_crc64);
157 break;
158 case VERIFY_CRC32C:
159 case VERIFY_CRC32:
160 case VERIFY_CRC32C_INTEL:
161 len = sizeof(struct vhdr_crc32);
162 break;
163 case VERIFY_CRC16:
164 len = sizeof(struct vhdr_crc16);
165 break;
166 case VERIFY_CRC7:
167 len = sizeof(struct vhdr_crc7);
168 break;
169 case VERIFY_SHA256:
170 len = sizeof(struct vhdr_sha256);
171 break;
172 case VERIFY_SHA512:
173 len = sizeof(struct vhdr_sha512);
174 break;
175 case VERIFY_META:
176 len = sizeof(struct vhdr_meta);
177 break;
178 case VERIFY_SHA1:
179 len = sizeof(struct vhdr_sha1);
180 break;
181 case VERIFY_PATTERN:
182 len = 0;
183 break;
184 default:
185 log_err("fio: unknown verify header!\n");
186 assert(0);
187 }
188
189 return len + sizeof(struct verify_header);
190}
191
192static inline unsigned int hdr_size(struct verify_header *hdr)
193{
194 return __hdr_size(hdr->verify_type);
195}
196
197static void *hdr_priv(struct verify_header *hdr)
198{
199 void *priv = hdr;
200
201 return priv + sizeof(struct verify_header);
202}
203
204/*
205 * Verify container, pass info to verify handlers and allow them to
206 * pass info back in case of error
207 */
208struct vcont {
209 /*
210 * Input
211 */
212 struct io_u *io_u;
213 unsigned int hdr_num;
214 struct thread_data *td;
215
216 /*
217 * Output, only valid in case of error
218 */
219 const char *name;
220 void *good_crc;
221 void *bad_crc;
222 unsigned int crc_len;
223};
224
225static void dump_buf(char *buf, unsigned int len, unsigned long long offset,
226 const char *type, struct fio_file *f)
227{
228 char *ptr, fname[256];
229 int ret, fd;
230
231 ptr = strdup(f->file_name);
232 strcpy(fname, basename(ptr));
233
234 sprintf(fname + strlen(fname), ".%llu.%s", offset, type);
235
236 fd = open(fname, O_CREAT | O_TRUNC | O_WRONLY, 0644);
237 if (fd < 0) {
238 perror("open verify buf file");
239 return;
240 }
241
242 while (len) {
243 ret = write(fd, buf, len);
244 if (!ret)
245 break;
246 else if (ret < 0) {
247 perror("write verify buf file");
248 break;
249 }
250 len -= ret;
251 buf += ret;
252 }
253
254 close(fd);
255 log_err(" %s data dumped as %s\n", type, fname);
256 free(ptr);
257}
258
259/*
260 * Dump the contents of the read block and re-generate the correct data
261 * and dump that too.
262 */
263static void dump_verify_buffers(struct verify_header *hdr, struct vcont *vc)
264{
265 struct thread_data *td = vc->td;
266 struct io_u *io_u = vc->io_u;
267 unsigned long hdr_offset;
268 struct io_u dummy;
269 void *buf;
270
271 if (!td->o.verify_dump)
272 return;
273
274 /*
275 * Dump the contents we just read off disk
276 */
277 hdr_offset = vc->hdr_num * hdr->len;
278
279 dump_buf(io_u->buf + hdr_offset, hdr->len, io_u->offset + hdr_offset,
280 "received", vc->io_u->file);
281
282 /*
283 * Allocate a new buf and re-generate the original data
284 */
285 buf = malloc(io_u->buflen);
286 dummy = *io_u;
287 dummy.buf = buf;
288 dummy.rand_seed = hdr->rand_seed;
289 dummy.buf_filled_len = 0;
290 dummy.buflen = io_u->buflen;
291
292 fill_pattern_headers(td, &dummy, hdr->rand_seed, 1);
293
294 dump_buf(buf + hdr_offset, hdr->len, io_u->offset + hdr_offset,
295 "expected", vc->io_u->file);
296 free(buf);
297}
298
299static void log_verify_failure(struct verify_header *hdr, struct vcont *vc)
300{
301 unsigned long long offset;
302
303 offset = vc->io_u->offset;
304 offset += vc->hdr_num * hdr->len;
305 log_err("%.8s: verify failed at file %s offset %llu, length %u\n",
306 vc->name, vc->io_u->file->file_name, offset, hdr->len);
307
308 if (vc->good_crc && vc->bad_crc) {
309 log_err(" Expected CRC: ");
310 hexdump(vc->good_crc, vc->crc_len);
311 log_err(" Received CRC: ");
312 hexdump(vc->bad_crc, vc->crc_len);
313 }
314
315 dump_verify_buffers(hdr, vc);
316}
317
318/*
319 * Return data area 'header_num'
320 */
321static inline void *io_u_verify_off(struct verify_header *hdr, struct vcont *vc)
322{
323 return vc->io_u->buf + vc->hdr_num * hdr->len + hdr_size(hdr);
324}
325
326static int verify_io_u_pattern(struct verify_header *hdr, struct vcont *vc)
327{
328 struct thread_data *td = vc->td;
329 struct io_u *io_u = vc->io_u;
330 char *buf, *pattern;
331 unsigned int header_size = __hdr_size(td->o.verify);
332 unsigned int len, mod, i, size, pattern_size;
333
334 pattern = td->o.verify_pattern;
335 pattern_size = td->o.verify_pattern_bytes;
336 if (pattern_size <= 1)
337 pattern_size = MAX_PATTERN_SIZE;
338 buf = (void *) hdr + header_size;
339 len = get_hdr_inc(td, io_u) - header_size;
340 mod = header_size % pattern_size;
341
342 for (i = 0; i < len; i += size) {
343 size = pattern_size - mod;
344 if (size > (len - i))
345 size = len - i;
346 if (memcmp(buf + i, pattern + mod, size))
347 /* Let the slow compare find the first mismatch byte. */
348 break;
349 mod = 0;
350 }
351
352 for (; i < len; i++) {
353 if (buf[i] != pattern[mod]) {
354 unsigned int bits;
355
356 bits = hweight8(buf[i] ^ pattern[mod]);
357 log_err("fio: got pattern %x, wanted %x. Bad bits %d\n",
358 buf[i], pattern[mod], bits);
359 log_err("fio: bad pattern block offset %u\n", i);
360 dump_verify_buffers(hdr, vc);
361 return EILSEQ;
362 }
363 mod++;
364 if (mod == td->o.verify_pattern_bytes)
365 mod = 0;
366 }
367
368 return 0;
369}
370
371static int verify_io_u_meta(struct verify_header *hdr, struct vcont *vc)
372{
373 struct thread_data *td = vc->td;
374 struct vhdr_meta *vh = hdr_priv(hdr);
375 struct io_u *io_u = vc->io_u;
376 int ret = EILSEQ;
377
378 dprint(FD_VERIFY, "meta verify io_u %p, len %u\n", io_u, hdr->len);
379
380 if (vh->offset == io_u->offset + vc->hdr_num * td->o.verify_interval)
381 ret = 0;
382
383 if (td->o.verify_pattern_bytes)
384 ret |= verify_io_u_pattern(hdr, vc);
385
386 if (!ret)
387 return 0;
388
389 vc->name = "meta";
390 log_verify_failure(hdr, vc);
391 return ret;
392}
393
394static int verify_io_u_sha512(struct verify_header *hdr, struct vcont *vc)
395{
396 void *p = io_u_verify_off(hdr, vc);
397 struct vhdr_sha512 *vh = hdr_priv(hdr);
398 uint8_t sha512[128];
399 struct fio_sha512_ctx sha512_ctx = {
400 .buf = sha512,
401 };
402
403 dprint(FD_VERIFY, "sha512 verify io_u %p, len %u\n", vc->io_u, hdr->len);
404
405 fio_sha512_init(&sha512_ctx);
406 fio_sha512_update(&sha512_ctx, p, hdr->len - hdr_size(hdr));
407
408 if (!memcmp(vh->sha512, sha512_ctx.buf, sizeof(sha512)))
409 return 0;
410
411 vc->name = "sha512";
412 vc->good_crc = vh->sha512;
413 vc->bad_crc = sha512_ctx.buf;
414 vc->crc_len = sizeof(vh->sha512);
415 log_verify_failure(hdr, vc);
416 return EILSEQ;
417}
418
419static int verify_io_u_sha256(struct verify_header *hdr, struct vcont *vc)
420{
421 void *p = io_u_verify_off(hdr, vc);
422 struct vhdr_sha256 *vh = hdr_priv(hdr);
423 uint8_t sha256[64];
424 struct fio_sha256_ctx sha256_ctx = {
425 .buf = sha256,
426 };
427
428 dprint(FD_VERIFY, "sha256 verify io_u %p, len %u\n", vc->io_u, hdr->len);
429
430 fio_sha256_init(&sha256_ctx);
431 fio_sha256_update(&sha256_ctx, p, hdr->len - hdr_size(hdr));
432
433 if (!memcmp(vh->sha256, sha256_ctx.buf, sizeof(sha256)))
434 return 0;
435
436 vc->name = "sha256";
437 vc->good_crc = vh->sha256;
438 vc->bad_crc = sha256_ctx.buf;
439 vc->crc_len = sizeof(vh->sha256);
440 log_verify_failure(hdr, vc);
441 return EILSEQ;
442}
443
444static int verify_io_u_sha1(struct verify_header *hdr, struct vcont *vc)
445{
446 void *p = io_u_verify_off(hdr, vc);
447 struct vhdr_sha1 *vh = hdr_priv(hdr);
448 uint32_t sha1[5];
449 struct fio_sha1_ctx sha1_ctx = {
450 .H = sha1,
451 };
452
453 dprint(FD_VERIFY, "sha1 verify io_u %p, len %u\n", vc->io_u, hdr->len);
454
455 fio_sha1_init(&sha1_ctx);
456 fio_sha1_update(&sha1_ctx, p, hdr->len - hdr_size(hdr));
457
458 if (!memcmp(vh->sha1, sha1_ctx.H, sizeof(sha1)))
459 return 0;
460
461 vc->name = "sha1";
462 vc->good_crc = vh->sha1;
463 vc->bad_crc = sha1_ctx.H;
464 vc->crc_len = sizeof(vh->sha1);
465 log_verify_failure(hdr, vc);
466 return EILSEQ;
467}
468
469static int verify_io_u_crc7(struct verify_header *hdr, struct vcont *vc)
470{
471 void *p = io_u_verify_off(hdr, vc);
472 struct vhdr_crc7 *vh = hdr_priv(hdr);
473 unsigned char c;
474
475 dprint(FD_VERIFY, "crc7 verify io_u %p, len %u\n", vc->io_u, hdr->len);
476
477 c = fio_crc7(p, hdr->len - hdr_size(hdr));
478
479 if (c == vh->crc7)
480 return 0;
481
482 vc->name = "crc7";
483 vc->good_crc = &vh->crc7;
484 vc->bad_crc = &c;
485 vc->crc_len = 1;
486 log_verify_failure(hdr, vc);
487 return EILSEQ;
488}
489
490static int verify_io_u_crc16(struct verify_header *hdr, struct vcont *vc)
491{
492 void *p = io_u_verify_off(hdr, vc);
493 struct vhdr_crc16 *vh = hdr_priv(hdr);
494 unsigned short c;
495
496 dprint(FD_VERIFY, "crc16 verify io_u %p, len %u\n", vc->io_u, hdr->len);
497
498 c = fio_crc16(p, hdr->len - hdr_size(hdr));
499
500 if (c == vh->crc16)
501 return 0;
502
503 vc->name = "crc16";
504 vc->good_crc = &vh->crc16;
505 vc->bad_crc = &c;
506 vc->crc_len = 2;
507 log_verify_failure(hdr, vc);
508 return EILSEQ;
509}
510
511static int verify_io_u_crc64(struct verify_header *hdr, struct vcont *vc)
512{
513 void *p = io_u_verify_off(hdr, vc);
514 struct vhdr_crc64 *vh = hdr_priv(hdr);
515 unsigned long long c;
516
517 dprint(FD_VERIFY, "crc64 verify io_u %p, len %u\n", vc->io_u, hdr->len);
518
519 c = fio_crc64(p, hdr->len - hdr_size(hdr));
520
521 if (c == vh->crc64)
522 return 0;
523
524 vc->name = "crc64";
525 vc->good_crc = &vh->crc64;
526 vc->bad_crc = &c;
527 vc->crc_len = 8;
528 log_verify_failure(hdr, vc);
529 return EILSEQ;
530}
531
532static int verify_io_u_crc32(struct verify_header *hdr, struct vcont *vc)
533{
534 void *p = io_u_verify_off(hdr, vc);
535 struct vhdr_crc32 *vh = hdr_priv(hdr);
536 uint32_t c;
537
538 dprint(FD_VERIFY, "crc32 verify io_u %p, len %u\n", vc->io_u, hdr->len);
539
540 c = fio_crc32(p, hdr->len - hdr_size(hdr));
541
542 if (c == vh->crc32)
543 return 0;
544
545 vc->name = "crc32";
546 vc->good_crc = &vh->crc32;
547 vc->bad_crc = &c;
548 vc->crc_len = 4;
549 log_verify_failure(hdr, vc);
550 return EILSEQ;
551}
552
553static int verify_io_u_crc32c(struct verify_header *hdr, struct vcont *vc)
554{
555 void *p = io_u_verify_off(hdr, vc);
556 struct vhdr_crc32 *vh = hdr_priv(hdr);
557 uint32_t c;
558
559 dprint(FD_VERIFY, "crc32c verify io_u %p, len %u\n", vc->io_u, hdr->len);
560
561 c = fio_crc32c(p, hdr->len - hdr_size(hdr));
562
563 if (c == vh->crc32)
564 return 0;
565
566 vc->name = "crc32c";
567 vc->good_crc = &vh->crc32;
568 vc->bad_crc = &c;
569 vc->crc_len = 4;
570 log_verify_failure(hdr, vc);
571 return EILSEQ;
572}
573
574static int verify_io_u_md5(struct verify_header *hdr, struct vcont *vc)
575{
576 void *p = io_u_verify_off(hdr, vc);
577 struct vhdr_md5 *vh = hdr_priv(hdr);
578 uint32_t hash[MD5_HASH_WORDS];
579 struct fio_md5_ctx md5_ctx = {
580 .hash = hash,
581 };
582
583 dprint(FD_VERIFY, "md5 verify io_u %p, len %u\n", vc->io_u, hdr->len);
584
585 fio_md5_init(&md5_ctx);
586 fio_md5_update(&md5_ctx, p, hdr->len - hdr_size(hdr));
587
588 if (!memcmp(vh->md5_digest, md5_ctx.hash, sizeof(hash)))
589 return 0;
590
591 vc->name = "md5";
592 vc->good_crc = vh->md5_digest;
593 vc->bad_crc = md5_ctx.hash;
594 vc->crc_len = sizeof(hash);
595 log_verify_failure(hdr, vc);
596 return EILSEQ;
597}
598
599/*
600 * Push IO verification to a separate thread
601 */
602int verify_io_u_async(struct thread_data *td, struct io_u *io_u)
603{
604 if (io_u->file)
605 put_file_log(td, io_u->file);
606
607 pthread_mutex_lock(&td->io_u_lock);
608
609 if (io_u->flags & IO_U_F_IN_CUR_DEPTH) {
610 td->cur_depth--;
611 io_u->flags &= ~IO_U_F_IN_CUR_DEPTH;
612 }
613 flist_add_tail(&io_u->verify_list, &td->verify_list);
614 io_u->flags |= IO_U_F_FREE_DEF;
615 pthread_mutex_unlock(&td->io_u_lock);
616
617 pthread_cond_signal(&td->verify_cond);
618 return 0;
619}
620
621static int verify_trimmed_io_u(struct thread_data *td, struct io_u *io_u)
622{
623 static char zero_buf[1024];
624 unsigned int this_len, len;
625 int ret = 0;
626 void *p;
627
628 if (!td->o.trim_zero)
629 return 0;
630
631 len = io_u->buflen;
632 p = io_u->buf;
633 do {
634 this_len = sizeof(zero_buf);
635 if (this_len > len)
636 this_len = len;
637 if (memcmp(p, zero_buf, this_len)) {
638 ret = EILSEQ;
639 break;
640 }
641 len -= this_len;
642 p += this_len;
643 } while (len);
644
645 if (!ret)
646 return 0;
647
648 log_err("trim: verify failed at file %s offset %llu, length %lu"
649 ", block offset %lu\n",
650 io_u->file->file_name, io_u->offset, io_u->buflen,
651 (unsigned long) (p - io_u->buf));
652 return ret;
653}
654
655static int verify_header(struct io_u *io_u, struct verify_header *hdr)
656{
657 void *p = hdr;
658 uint32_t crc;
659
660 if (hdr->magic != FIO_HDR_MAGIC)
661 return 0;
662 if (hdr->len > io_u->buflen) {
663 log_err("fio: verify header exceeds buffer length (%u > %lu)\n", hdr->len, io_u->buflen);
664 return 0;
665 }
666
667 crc = fio_crc32c(p, offsetof(struct verify_header, crc32));
668 if (crc == hdr->crc32)
669 return 1;
670
671 log_err("fio: verify header crc %x, calculated %x\n", hdr->crc32, crc);
672 return 0;
673}
674
675int verify_io_u(struct thread_data *td, struct io_u *io_u)
676{
677 struct verify_header *hdr;
678 unsigned int header_size, hdr_inc, hdr_num = 0;
679 void *p;
680 int ret;
681
682 if (td->o.verify == VERIFY_NULL || io_u->ddir != DDIR_READ)
683 return 0;
684 if (io_u->flags & IO_U_F_TRIMMED) {
685 ret = verify_trimmed_io_u(td, io_u);
686 goto done;
687 }
688
689 hdr_inc = get_hdr_inc(td, io_u);
690
691 ret = 0;
692 for (p = io_u->buf; p < io_u->buf + io_u->buflen;
693 p += hdr_inc, hdr_num++) {
694 struct vcont vc = {
695 .io_u = io_u,
696 .hdr_num = hdr_num,
697 .td = td,
698 };
699 unsigned int verify_type;
700
701 if (ret && td->o.verify_fatal)
702 break;
703
704 header_size = __hdr_size(td->o.verify);
705 if (td->o.verify_offset)
706 memswp(p, p + td->o.verify_offset, header_size);
707 hdr = p;
708
709 if (!verify_header(io_u, hdr)) {
710 log_err("verify: bad magic header %x, wanted %x at "
711 "file %s offset %llu, length %u\n",
712 hdr->magic, FIO_HDR_MAGIC,
713 io_u->file->file_name,
714 io_u->offset + hdr_num * hdr->len, hdr->len);
715 return EILSEQ;
716 }
717
718 if (td->o.verify != VERIFY_NONE)
719 verify_type = td->o.verify;
720 else
721 verify_type = hdr->verify_type;
722
723 switch (verify_type) {
724 case VERIFY_MD5:
725 ret = verify_io_u_md5(hdr, &vc);
726 break;
727 case VERIFY_CRC64:
728 ret = verify_io_u_crc64(hdr, &vc);
729 break;
730 case VERIFY_CRC32C:
731 case VERIFY_CRC32C_INTEL:
732 ret = verify_io_u_crc32c(hdr, &vc);
733 break;
734 case VERIFY_CRC32:
735 ret = verify_io_u_crc32(hdr, &vc);
736 break;
737 case VERIFY_CRC16:
738 ret = verify_io_u_crc16(hdr, &vc);
739 break;
740 case VERIFY_CRC7:
741 ret = verify_io_u_crc7(hdr, &vc);
742 break;
743 case VERIFY_SHA256:
744 ret = verify_io_u_sha256(hdr, &vc);
745 break;
746 case VERIFY_SHA512:
747 ret = verify_io_u_sha512(hdr, &vc);
748 break;
749 case VERIFY_META:
750 ret = verify_io_u_meta(hdr, &vc);
751 break;
752 case VERIFY_SHA1:
753 ret = verify_io_u_sha1(hdr, &vc);
754 break;
755 case VERIFY_PATTERN:
756 ret = verify_io_u_pattern(hdr, &vc);
757 break;
758 default:
759 log_err("Bad verify type %u\n", hdr->verify_type);
760 ret = EINVAL;
761 }
762
763 if (ret && verify_type != hdr->verify_type)
764 log_err("fio: verify type mismatch (%u media, %u given)\n",
765 hdr->verify_type, verify_type);
766 }
767
768done:
769 if (ret && td->o.verify_fatal)
770 td->terminate = 1;
771
772 return ret;
773}
774
775static void fill_meta(struct verify_header *hdr, struct thread_data *td,
776 struct io_u *io_u, unsigned int header_num)
777{
778 struct vhdr_meta *vh = hdr_priv(hdr);
779
780 vh->thread = td->thread_number;
781
782 vh->time_sec = io_u->start_time.tv_sec;
783 vh->time_usec = io_u->start_time.tv_usec;
784
785 vh->numberio = td->io_issues[DDIR_WRITE];
786
787 vh->offset = io_u->offset + header_num * td->o.verify_interval;
788}
789
790static void fill_sha512(struct verify_header *hdr, void *p, unsigned int len)
791{
792 struct vhdr_sha512 *vh = hdr_priv(hdr);
793 struct fio_sha512_ctx sha512_ctx = {
794 .buf = vh->sha512,
795 };
796
797 fio_sha512_init(&sha512_ctx);
798 fio_sha512_update(&sha512_ctx, p, len);
799}
800
801static void fill_sha256(struct verify_header *hdr, void *p, unsigned int len)
802{
803 struct vhdr_sha256 *vh = hdr_priv(hdr);
804 struct fio_sha256_ctx sha256_ctx = {
805 .buf = vh->sha256,
806 };
807
808 fio_sha256_init(&sha256_ctx);
809 fio_sha256_update(&sha256_ctx, p, len);
810}
811
812static void fill_sha1(struct verify_header *hdr, void *p, unsigned int len)
813{
814 struct vhdr_sha1 *vh = hdr_priv(hdr);
815 struct fio_sha1_ctx sha1_ctx = {
816 .H = vh->sha1,
817 };
818
819 fio_sha1_init(&sha1_ctx);
820 fio_sha1_update(&sha1_ctx, p, len);
821}
822
823static void fill_crc7(struct verify_header *hdr, void *p, unsigned int len)
824{
825 struct vhdr_crc7 *vh = hdr_priv(hdr);
826
827 vh->crc7 = fio_crc7(p, len);
828}
829
830static void fill_crc16(struct verify_header *hdr, void *p, unsigned int len)
831{
832 struct vhdr_crc16 *vh = hdr_priv(hdr);
833
834 vh->crc16 = fio_crc16(p, len);
835}
836
837static void fill_crc32(struct verify_header *hdr, void *p, unsigned int len)
838{
839 struct vhdr_crc32 *vh = hdr_priv(hdr);
840
841 vh->crc32 = fio_crc32(p, len);
842}
843
844static void fill_crc32c(struct verify_header *hdr, void *p, unsigned int len)
845{
846 struct vhdr_crc32 *vh = hdr_priv(hdr);
847
848 vh->crc32 = fio_crc32c(p, len);
849}
850
851static void fill_crc64(struct verify_header *hdr, void *p, unsigned int len)
852{
853 struct vhdr_crc64 *vh = hdr_priv(hdr);
854
855 vh->crc64 = fio_crc64(p, len);
856}
857
858static void fill_md5(struct verify_header *hdr, void *p, unsigned int len)
859{
860 struct vhdr_md5 *vh = hdr_priv(hdr);
861 struct fio_md5_ctx md5_ctx = {
862 .hash = (uint32_t *) vh->md5_digest,
863 };
864
865 fio_md5_init(&md5_ctx);
866 fio_md5_update(&md5_ctx, p, len);
867}
868
869static void populate_hdr(struct thread_data *td, struct io_u *io_u,
870 struct verify_header *hdr, unsigned int header_num,
871 unsigned int header_len)
872{
873 unsigned int data_len;
874 void *data, *p;
875
876 p = (void *) hdr;
877
878 hdr->magic = FIO_HDR_MAGIC;
879 hdr->verify_type = td->o.verify;
880 hdr->len = header_len;
881 hdr->rand_seed = io_u->rand_seed;
882 hdr->crc32 = fio_crc32c(p, offsetof(struct verify_header, crc32));
883
884 data_len = header_len - hdr_size(hdr);
885
886 data = p + hdr_size(hdr);
887 switch (td->o.verify) {
888 case VERIFY_MD5:
889 dprint(FD_VERIFY, "fill md5 io_u %p, len %u\n",
890 io_u, hdr->len);
891 fill_md5(hdr, data, data_len);
892 break;
893 case VERIFY_CRC64:
894 dprint(FD_VERIFY, "fill crc64 io_u %p, len %u\n",
895 io_u, hdr->len);
896 fill_crc64(hdr, data, data_len);
897 break;
898 case VERIFY_CRC32C:
899 case VERIFY_CRC32C_INTEL:
900 dprint(FD_VERIFY, "fill crc32c io_u %p, len %u\n",
901 io_u, hdr->len);
902 fill_crc32c(hdr, data, data_len);
903 break;
904 case VERIFY_CRC32:
905 dprint(FD_VERIFY, "fill crc32 io_u %p, len %u\n",
906 io_u, hdr->len);
907 fill_crc32(hdr, data, data_len);
908 break;
909 case VERIFY_CRC16:
910 dprint(FD_VERIFY, "fill crc16 io_u %p, len %u\n",
911 io_u, hdr->len);
912 fill_crc16(hdr, data, data_len);
913 break;
914 case VERIFY_CRC7:
915 dprint(FD_VERIFY, "fill crc7 io_u %p, len %u\n",
916 io_u, hdr->len);
917 fill_crc7(hdr, data, data_len);
918 break;
919 case VERIFY_SHA256:
920 dprint(FD_VERIFY, "fill sha256 io_u %p, len %u\n",
921 io_u, hdr->len);
922 fill_sha256(hdr, data, data_len);
923 break;
924 case VERIFY_SHA512:
925 dprint(FD_VERIFY, "fill sha512 io_u %p, len %u\n",
926 io_u, hdr->len);
927 fill_sha512(hdr, data, data_len);
928 break;
929 case VERIFY_META:
930 dprint(FD_VERIFY, "fill meta io_u %p, len %u\n",
931 io_u, hdr->len);
932 fill_meta(hdr, td, io_u, header_num);
933 break;
934 case VERIFY_SHA1:
935 dprint(FD_VERIFY, "fill sha1 io_u %p, len %u\n",
936 io_u, hdr->len);
937 fill_sha1(hdr, data, data_len);
938 break;
939 case VERIFY_PATTERN:
940 /* nothing to do here */
941 break;
942 default:
943 log_err("fio: bad verify type: %d\n", td->o.verify);
944 assert(0);
945 }
946 if (td->o.verify_offset)
947 memswp(p, p + td->o.verify_offset, hdr_size(hdr));
948}
949
950/*
951 * fill body of io_u->buf with random data and add a header with the
952 * checksum of choice
953 */
954void populate_verify_io_u(struct thread_data *td, struct io_u *io_u)
955{
956 if (td->o.verify == VERIFY_NULL)
957 return;
958
959 fill_pattern_headers(td, io_u, 0, 0);
960}
961
962int get_next_verify(struct thread_data *td, struct io_u *io_u)
963{
964 struct io_piece *ipo = NULL;
965
966 /*
967 * this io_u is from a requeue, we already filled the offsets
968 */
969 if (io_u->file)
970 return 0;
971
972 if (!RB_EMPTY_ROOT(&td->io_hist_tree)) {
973 struct rb_node *n = rb_first(&td->io_hist_tree);
974
975 ipo = rb_entry(n, struct io_piece, rb_node);
976 rb_erase(n, &td->io_hist_tree);
977 assert(ipo->flags & IP_F_ONRB);
978 ipo->flags &= ~IP_F_ONRB;
979 } else if (!flist_empty(&td->io_hist_list)) {
980 ipo = flist_entry(td->io_hist_list.next, struct io_piece, list);
981 flist_del(&ipo->list);
982 assert(ipo->flags & IP_F_ONLIST);
983 ipo->flags &= ~IP_F_ONLIST;
984 }
985
986 if (ipo) {
987 td->io_hist_len--;
988
989 io_u->offset = ipo->offset;
990 io_u->buflen = ipo->len;
991 io_u->file = ipo->file;
992 io_u->flags |= IO_U_F_VER_LIST;
993
994 if (ipo->flags & IP_F_TRIMMED)
995 io_u->flags |= IO_U_F_TRIMMED;
996
997 if (!fio_file_open(io_u->file)) {
998 int r = td_io_open_file(td, io_u->file);
999
1000 if (r) {
1001 dprint(FD_VERIFY, "failed file %s open\n",
1002 io_u->file->file_name);
1003 return 1;
1004 }
1005 }
1006
1007 get_file(ipo->file);
1008 assert(fio_file_open(io_u->file));
1009 io_u->ddir = DDIR_READ;
1010 io_u->xfer_buf = io_u->buf;
1011 io_u->xfer_buflen = io_u->buflen;
1012
1013 remove_trim_entry(td, ipo);
1014 free(ipo);
1015 dprint(FD_VERIFY, "get_next_verify: ret io_u %p\n", io_u);
1016 return 0;
1017 }
1018
1019 dprint(FD_VERIFY, "get_next_verify: empty\n");
1020 return 1;
1021}
1022
1023void fio_verify_init(struct thread_data *td)
1024{
1025 if (td->o.verify == VERIFY_CRC32C_INTEL ||
1026 td->o.verify == VERIFY_CRC32C) {
1027 crc32c_intel_probe();
1028 }
1029}
1030
1031static void *verify_async_thread(void *data)
1032{
1033 struct thread_data *td = data;
1034 struct io_u *io_u;
1035 int ret = 0;
1036
1037 if (td->o.verify_cpumask_set &&
1038 fio_setaffinity(td->pid, td->o.verify_cpumask)) {
1039 log_err("fio: failed setting verify thread affinity\n");
1040 goto done;
1041 }
1042
1043 do {
1044 FLIST_HEAD(list);
1045
1046 read_barrier();
1047 if (td->verify_thread_exit)
1048 break;
1049
1050 pthread_mutex_lock(&td->io_u_lock);
1051
1052 while (flist_empty(&td->verify_list) &&
1053 !td->verify_thread_exit) {
1054 ret = pthread_cond_wait(&td->verify_cond,
1055 &td->io_u_lock);
1056 if (ret) {
1057 pthread_mutex_unlock(&td->io_u_lock);
1058 break;
1059 }
1060 }
1061
1062 flist_splice_init(&td->verify_list, &list);
1063 pthread_mutex_unlock(&td->io_u_lock);
1064
1065 if (flist_empty(&list))
1066 continue;
1067
1068 while (!flist_empty(&list)) {
1069 io_u = flist_entry(list.next, struct io_u, verify_list);
1070 flist_del(&io_u->verify_list);
1071
1072 ret = verify_io_u(td, io_u);
1073 put_io_u(td, io_u);
1074 if (!ret)
1075 continue;
1076 if (td_non_fatal_error(td, ERROR_TYPE_VERIFY_BIT, ret)) {
1077 update_error_count(td, ret);
1078 td_clear_error(td);
1079 ret = 0;
1080 }
1081 }
1082 } while (!ret);
1083
1084 if (ret) {
1085 td_verror(td, ret, "async_verify");
1086 if (td->o.verify_fatal)
1087 td->terminate = 1;
1088 }
1089
1090done:
1091 pthread_mutex_lock(&td->io_u_lock);
1092 td->nr_verify_threads--;
1093 pthread_mutex_unlock(&td->io_u_lock);
1094
1095 pthread_cond_signal(&td->free_cond);
1096 return NULL;
1097}
1098
1099int verify_async_init(struct thread_data *td)
1100{
1101 int i, ret;
1102 pthread_attr_t attr;
1103
1104 pthread_attr_init(&attr);
1105 pthread_attr_setstacksize(&attr, PTHREAD_STACK_MIN);
1106
1107 td->verify_thread_exit = 0;
1108
1109 td->verify_threads = malloc(sizeof(pthread_t) * td->o.verify_async);
1110 for (i = 0; i < td->o.verify_async; i++) {
1111 ret = pthread_create(&td->verify_threads[i], &attr,
1112 verify_async_thread, td);
1113 if (ret) {
1114 log_err("fio: async verify creation failed: %s\n",
1115 strerror(ret));
1116 break;
1117 }
1118 ret = pthread_detach(td->verify_threads[i]);
1119 if (ret) {
1120 log_err("fio: async verify thread detach failed: %s\n",
1121 strerror(ret));
1122 break;
1123 }
1124 td->nr_verify_threads++;
1125 }
1126
1127 pthread_attr_destroy(&attr);
1128
1129 if (i != td->o.verify_async) {
1130 log_err("fio: only %d verify threads started, exiting\n", i);
1131 td->verify_thread_exit = 1;
1132 write_barrier();
1133 pthread_cond_broadcast(&td->verify_cond);
1134 return 1;
1135 }
1136
1137 return 0;
1138}
1139
1140void verify_async_exit(struct thread_data *td)
1141{
1142 td->verify_thread_exit = 1;
1143 write_barrier();
1144 pthread_cond_broadcast(&td->verify_cond);
1145
1146 pthread_mutex_lock(&td->io_u_lock);
1147
1148 while (td->nr_verify_threads)
1149 pthread_cond_wait(&td->free_cond, &td->io_u_lock);
1150
1151 pthread_mutex_unlock(&td->io_u_lock);
1152 free(td->verify_threads);
1153 td->verify_threads = NULL;
1154}
fio - Flexible IO Tester