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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 "smalloc.h"
14#include "trim.h"
15#include "lib/rand.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
31void fill_pattern(struct thread_data *td, void *p, unsigned int len, struct io_u *io_u, unsigned long seed, int use_seed)
32{
33 switch (td->o.verify_pattern_bytes) {
34 case 0:
35 dprint(FD_VERIFY, "fill random bytes len=%u\n", len);
36 if (use_seed)
37 __fill_random_buf(p, len, seed);
38 else
39 io_u->rand_seed = fill_random_buf(&td->buf_state, p, len);
40 break;
41 case 1:
42 if (io_u->buf_filled_len >= len) {
43 dprint(FD_VERIFY, "using already filled verify pattern b=0 len=%u\n", len);
44 return;
45 }
46 dprint(FD_VERIFY, "fill verify pattern b=0 len=%u\n", len);
47 memset(p, td->o.verify_pattern[0], len);
48 io_u->buf_filled_len = len;
49 break;
50 default: {
51 unsigned int i = 0, size = 0;
52 unsigned char *b = p;
53
54 if (io_u->buf_filled_len >= len) {
55 dprint(FD_VERIFY, "using already filled verify pattern b=%d len=%u\n",
56 td->o.verify_pattern_bytes, len);
57 return;
58 }
59
60 dprint(FD_VERIFY, "fill verify pattern b=%d len=%u\n",
61 td->o.verify_pattern_bytes, len);
62
63 while (i < len) {
64 size = td->o.verify_pattern_bytes;
65 if (size > (len - i))
66 size = len - i;
67 memcpy(b+i, td->o.verify_pattern, size);
68 i += size;
69 }
70 io_u->buf_filled_len = len;
71 break;
72 }
73 }
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)
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_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 seperation 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_META:
162 len = sizeof(struct vhdr_meta);
163 break;
164 case VERIFY_SHA1:
165 len = sizeof(struct vhdr_sha1);
166 break;
167 case VERIFY_PATTERN:
168 len = 0;
169 break;
170 default:
171 log_err("fio: unknown verify header!\n");
172 assert(0);
173 }
174
175 return len + sizeof(struct verify_header);
176}
177
178static inline unsigned int hdr_size(struct verify_header *hdr)
179{
180 return __hdr_size(hdr->verify_type);
181}
182
183static void *hdr_priv(struct verify_header *hdr)
184{
185 void *priv = hdr;
186
187 return priv + sizeof(struct verify_header);
188}
189
190/*
191 * Verify container, pass info to verify handlers and allow them to
192 * pass info back in case of error
193 */
194struct vcont {
195 /*
196 * Input
197 */
198 struct io_u *io_u;
199 unsigned int hdr_num;
200 struct thread_data *td;
201
202 /*
203 * Output, only valid in case of error
204 */
205 const char *name;
206 void *good_crc;
207 void *bad_crc;
208 unsigned int crc_len;
209};
210
211static void dump_buf(char *buf, unsigned int len, unsigned long long offset,
212 const char *type, struct fio_file *f)
213{
214 char *ptr, fname[256];
215 int ret, fd;
216
217 ptr = strdup(f->file_name);
218 strcpy(fname, basename(ptr));
219
220 sprintf(fname + strlen(fname), ".%llu.%s", offset, type);
221
222 fd = open(fname, O_CREAT | O_TRUNC | O_WRONLY, 0644);
223 if (fd < 0) {
224 perror("open verify buf file");
225 return;
226 }
227
228 while (len) {
229 ret = write(fd, buf, len);
230 if (!ret)
231 break;
232 else if (ret < 0) {
233 perror("write verify buf file");
234 break;
235 }
236 len -= ret;
237 buf += ret;
238 }
239
240 close(fd);
241 log_err(" %s data dumped as %s\n", type, fname);
242 free(ptr);
243}
244
245/*
246 * Dump the contents of the read block and re-generate the correct data
247 * and dump that too.
248 */
249static void dump_verify_buffers(struct verify_header *hdr, struct vcont *vc)
250{
251 struct thread_data *td = vc->td;
252 struct io_u *io_u = vc->io_u;
253 unsigned long hdr_offset;
254 struct io_u dummy;
255 void *buf;
256
257 if (!td->o.verify_dump)
258 return;
259
260 /*
261 * Dump the contents we just read off disk
262 */
263 hdr_offset = vc->hdr_num * hdr->len;
264
265 dump_buf(io_u->buf + hdr_offset, hdr->len, io_u->offset + hdr_offset,
266 "received", vc->io_u->file);
267
268 /*
269 * Allocate a new buf and re-generate the original data
270 */
271 buf = malloc(io_u->buflen);
272 dummy = *io_u;
273 dummy.buf = buf;
274 dummy.rand_seed = hdr->rand_seed;
275 dummy.buf_filled_len = 0;
276
277 fill_pattern_headers(td, &dummy, hdr->rand_seed, 1);
278
279 dump_buf(buf + hdr_offset, hdr->len, io_u->offset + hdr_offset,
280 "expected", vc->io_u->file);
281 free(buf);
282}
283
284static void log_verify_failure(struct verify_header *hdr, struct vcont *vc)
285{
286 unsigned long long offset;
287
288 offset = vc->io_u->offset;
289 offset += vc->hdr_num * hdr->len;
290 log_err("%.8s: verify failed at file %s offset %llu, length %u\n",
291 vc->name, vc->io_u->file->file_name, offset, hdr->len);
292
293 if (vc->good_crc && vc->bad_crc) {
294 log_err(" Expected CRC: ");
295 hexdump(vc->good_crc, vc->crc_len);
296 log_err(" Received CRC: ");
297 hexdump(vc->bad_crc, vc->crc_len);
298 }
299
300 dump_verify_buffers(hdr, vc);
301}
302
303/*
304 * Return data area 'header_num'
305 */
306static inline void *io_u_verify_off(struct verify_header *hdr, struct vcont *vc)
307{
308 return vc->io_u->buf + vc->hdr_num * hdr->len + hdr_size(hdr);
309}
310
311static unsigned int hweight8(unsigned int w)
312{
313 unsigned int res = w - ((w >> 1) & 0x55);
314
315 res = (res & 0x33) + ((res >> 2) & 0x33);
316 return (res + (res >> 4)) & 0x0F;
317}
318
319static int verify_io_u_pattern(struct verify_header *hdr, struct vcont *vc)
320{
321 struct thread_data *td = vc->td;
322 struct io_u *io_u = vc->io_u;
323 char *buf, *pattern;
324 unsigned int header_size = __hdr_size(td->o.verify);
325 unsigned int len, mod, i, size, pattern_size;
326
327 pattern = td->o.verify_pattern;
328 pattern_size = td->o.verify_pattern_bytes;
329 if (pattern_size <= 1)
330 pattern_size = MAX_PATTERN_SIZE;
331 buf = (void *) hdr + header_size;
332 len = get_hdr_inc(td, io_u) - header_size;
333 mod = header_size % pattern_size;
334
335 for (i = 0; i < len; i += size) {
336 size = pattern_size - mod;
337 if (size > (len - i))
338 size = len - i;
339 if (memcmp(buf + i, pattern + mod, size))
340 // Let the slow compare find the first mismatch byte.
341 break;
342 mod = 0;
343 }
344
345 for (; i < len; i++) {
346 if (buf[i] != pattern[mod]) {
347 unsigned int bits;
348
349 bits = hweight8(buf[i] ^ pattern[mod]);
350 log_err("fio: got pattern %x, wanted %x. Bad bits %d\n",
351 buf[i], pattern[mod], bits);
352 log_err("fio: bad pattern block offset %u\n", i);
353 dump_verify_buffers(hdr, vc);
354 return EILSEQ;
355 }
356 mod++;
357 if (mod == td->o.verify_pattern_bytes)
358 mod = 0;
359 }
360
361 return 0;
362}
363
364static int verify_io_u_meta(struct verify_header *hdr, struct vcont *vc)
365{
366 struct thread_data *td = vc->td;
367 struct vhdr_meta *vh = hdr_priv(hdr);
368 struct io_u *io_u = vc->io_u;
369 int ret = EILSEQ;
370
371 dprint(FD_VERIFY, "meta verify io_u %p, len %u\n", io_u, hdr->len);
372
373 if (vh->offset == io_u->offset + vc->hdr_num * td->o.verify_interval)
374 ret = 0;
375
376 if (td->o.verify_pattern_bytes)
377 ret |= verify_io_u_pattern(hdr, vc);
378
379 if (!ret)
380 return 0;
381
382 vc->name = "meta";
383 log_verify_failure(hdr, vc);
384 return ret;
385}
386
387static int verify_io_u_sha512(struct verify_header *hdr, struct vcont *vc)
388{
389 void *p = io_u_verify_off(hdr, vc);
390 struct vhdr_sha512 *vh = hdr_priv(hdr);
391 uint8_t sha512[128];
392 struct sha512_ctx sha512_ctx = {
393 .buf = sha512,
394 };
395
396 dprint(FD_VERIFY, "sha512 verify io_u %p, len %u\n", vc->io_u, hdr->len);
397
398 sha512_init(&sha512_ctx);
399 sha512_update(&sha512_ctx, p, hdr->len - hdr_size(hdr));
400
401 if (!memcmp(vh->sha512, sha512_ctx.buf, sizeof(sha512)))
402 return 0;
403
404 vc->name = "sha512";
405 vc->good_crc = vh->sha512;
406 vc->bad_crc = sha512_ctx.buf;
407 vc->crc_len = sizeof(vh->sha512);
408 log_verify_failure(hdr, vc);
409 return EILSEQ;
410}
411
412static int verify_io_u_sha256(struct verify_header *hdr, struct vcont *vc)
413{
414 void *p = io_u_verify_off(hdr, vc);
415 struct vhdr_sha256 *vh = hdr_priv(hdr);
416 uint8_t sha256[64];
417 struct sha256_ctx sha256_ctx = {
418 .buf = sha256,
419 };
420
421 dprint(FD_VERIFY, "sha256 verify io_u %p, len %u\n", vc->io_u, hdr->len);
422
423 sha256_init(&sha256_ctx);
424 sha256_update(&sha256_ctx, p, hdr->len - hdr_size(hdr));
425
426 if (!memcmp(vh->sha256, sha256_ctx.buf, sizeof(sha256)))
427 return 0;
428
429 vc->name = "sha256";
430 vc->good_crc = vh->sha256;
431 vc->bad_crc = sha256_ctx.buf;
432 vc->crc_len = sizeof(vh->sha256);
433 log_verify_failure(hdr, vc);
434 return EILSEQ;
435}
436
437static int verify_io_u_sha1(struct verify_header *hdr, struct vcont *vc)
438{
439 void *p = io_u_verify_off(hdr, vc);
440 struct vhdr_sha1 *vh = hdr_priv(hdr);
441 uint32_t sha1[5];
442 struct sha1_ctx sha1_ctx = {
443 .H = sha1,
444 };
445
446 dprint(FD_VERIFY, "sha1 verify io_u %p, len %u\n", vc->io_u, hdr->len);
447
448 sha1_init(&sha1_ctx);
449 sha1_update(&sha1_ctx, p, hdr->len - hdr_size(hdr));
450
451 if (!memcmp(vh->sha1, sha1_ctx.H, sizeof(sha1)))
452 return 0;
453
454 vc->name = "sha1";
455 vc->good_crc = vh->sha1;
456 vc->bad_crc = sha1_ctx.H;
457 vc->crc_len = sizeof(vh->sha1);
458 log_verify_failure(hdr, vc);
459 return EILSEQ;
460}
461
462static int verify_io_u_crc7(struct verify_header *hdr, struct vcont *vc)
463{
464 void *p = io_u_verify_off(hdr, vc);
465 struct vhdr_crc7 *vh = hdr_priv(hdr);
466 unsigned char c;
467
468 dprint(FD_VERIFY, "crc7 verify io_u %p, len %u\n", vc->io_u, hdr->len);
469
470 c = crc7(p, hdr->len - hdr_size(hdr));
471
472 if (c == vh->crc7)
473 return 0;
474
475 vc->name = "crc7";
476 vc->good_crc = &vh->crc7;
477 vc->bad_crc = &c;
478 vc->crc_len = 1;
479 log_verify_failure(hdr, vc);
480 return EILSEQ;
481}
482
483static int verify_io_u_crc16(struct verify_header *hdr, struct vcont *vc)
484{
485 void *p = io_u_verify_off(hdr, vc);
486 struct vhdr_crc16 *vh = hdr_priv(hdr);
487 unsigned short c;
488
489 dprint(FD_VERIFY, "crc16 verify io_u %p, len %u\n", vc->io_u, hdr->len);
490
491 c = crc16(p, hdr->len - hdr_size(hdr));
492
493 if (c == vh->crc16)
494 return 0;
495
496 vc->name = "crc16";
497 vc->good_crc = &vh->crc16;
498 vc->bad_crc = &c;
499 vc->crc_len = 2;
500 log_verify_failure(hdr, vc);
501 return EILSEQ;
502}
503
504static int verify_io_u_crc64(struct verify_header *hdr, struct vcont *vc)
505{
506 void *p = io_u_verify_off(hdr, vc);
507 struct vhdr_crc64 *vh = hdr_priv(hdr);
508 unsigned long long c;
509
510 dprint(FD_VERIFY, "crc64 verify io_u %p, len %u\n", vc->io_u, hdr->len);
511
512 c = crc64(p, hdr->len - hdr_size(hdr));
513
514 if (c == vh->crc64)
515 return 0;
516
517 vc->name = "crc64";
518 vc->good_crc = &vh->crc64;
519 vc->bad_crc = &c;
520 vc->crc_len = 8;
521 log_verify_failure(hdr, vc);
522 return EILSEQ;
523}
524
525static int verify_io_u_crc32(struct verify_header *hdr, struct vcont *vc)
526{
527 void *p = io_u_verify_off(hdr, vc);
528 struct vhdr_crc32 *vh = hdr_priv(hdr);
529 uint32_t c;
530
531 dprint(FD_VERIFY, "crc32 verify io_u %p, len %u\n", vc->io_u, hdr->len);
532
533 c = crc32(p, hdr->len - hdr_size(hdr));
534
535 if (c == vh->crc32)
536 return 0;
537
538 vc->name = "crc32";
539 vc->good_crc = &vh->crc32;
540 vc->bad_crc = &c;
541 vc->crc_len = 4;
542 log_verify_failure(hdr, vc);
543 return EILSEQ;
544}
545
546static int verify_io_u_crc32c(struct verify_header *hdr, struct vcont *vc)
547{
548 void *p = io_u_verify_off(hdr, vc);
549 struct vhdr_crc32 *vh = hdr_priv(hdr);
550 uint32_t c;
551
552 dprint(FD_VERIFY, "crc32c verify io_u %p, len %u\n", vc->io_u, hdr->len);
553
554 c = crc32c(p, hdr->len - hdr_size(hdr));
555
556 if (c == vh->crc32)
557 return 0;
558
559 vc->name = "crc32c";
560 vc->good_crc = &vh->crc32;
561 vc->bad_crc = &c;
562 vc->crc_len = 4;
563 log_verify_failure(hdr, vc);
564 return EILSEQ;
565}
566
567static int verify_io_u_md5(struct verify_header *hdr, struct vcont *vc)
568{
569 void *p = io_u_verify_off(hdr, vc);
570 struct vhdr_md5 *vh = hdr_priv(hdr);
571 uint32_t hash[MD5_HASH_WORDS];
572 struct md5_ctx md5_ctx = {
573 .hash = hash,
574 };
575
576 dprint(FD_VERIFY, "md5 verify io_u %p, len %u\n", vc->io_u, hdr->len);
577
578 md5_init(&md5_ctx);
579 md5_update(&md5_ctx, p, hdr->len - hdr_size(hdr));
580
581 if (!memcmp(vh->md5_digest, md5_ctx.hash, sizeof(hash)))
582 return 0;
583
584 vc->name = "md5";
585 vc->good_crc = vh->md5_digest;
586 vc->bad_crc = md5_ctx.hash;
587 vc->crc_len = sizeof(hash);
588 log_verify_failure(hdr, vc);
589 return EILSEQ;
590}
591
592/*
593 * Push IO verification to a separate thread
594 */
595int verify_io_u_async(struct thread_data *td, struct io_u *io_u)
596{
597 if (io_u->file)
598 put_file_log(td, io_u->file);
599
600 pthread_mutex_lock(&td->io_u_lock);
601
602 if (io_u->flags & IO_U_F_IN_CUR_DEPTH) {
603 td->cur_depth--;
604 io_u->flags &= ~IO_U_F_IN_CUR_DEPTH;
605 }
606 flist_del(&io_u->list);
607 flist_add_tail(&io_u->list, &td->verify_list);
608 io_u->flags |= IO_U_F_FREE_DEF;
609 pthread_mutex_unlock(&td->io_u_lock);
610
611 pthread_cond_signal(&td->verify_cond);
612 return 0;
613}
614
615static int verify_trimmed_io_u(struct thread_data *td, struct io_u *io_u)
616{
617 static char zero_buf[1024];
618 unsigned int this_len, len;
619 int ret = 0;
620 void *p;
621
622 if (!td->o.trim_zero)
623 return 0;
624
625 len = io_u->buflen;
626 p = io_u->buf;
627 do {
628 this_len = sizeof(zero_buf);
629 if (this_len > len)
630 this_len = len;
631 if (memcmp(p, zero_buf, this_len)) {
632 ret = EILSEQ;
633 break;
634 }
635 len -= this_len;
636 p += this_len;
637 } while (len);
638
639 if (!ret)
640 return 0;
641
642 log_err("trim: verify failed at file %s offset %llu, length %lu"
643 ", block offset %lu\n",
644 io_u->file->file_name, io_u->offset, io_u->buflen,
645 (unsigned long) (p - io_u->buf));
646 return ret;
647}
648
649static int verify_hdr_crc(struct verify_header *hdr)
650{
651 void *p = hdr;
652 uint32_t crc;
653
654 crc = crc32c(p, sizeof(*hdr) - sizeof(hdr->crc32));
655 if (crc == hdr->crc32)
656 return 1;
657
658 log_err("fio: verify header crc %x, calculated %x\n", hdr->crc32, crc);
659 return 0;
660}
661
662int verify_io_u(struct thread_data *td, struct io_u *io_u)
663{
664 struct verify_header *hdr;
665 unsigned int header_size, hdr_inc, hdr_num = 0;
666 void *p;
667 int ret;
668
669 if (td->o.verify == VERIFY_NULL || io_u->ddir != DDIR_READ)
670 return 0;
671 if (io_u->flags & IO_U_F_TRIMMED) {
672 ret = verify_trimmed_io_u(td, io_u);
673 goto done;
674 }
675
676 hdr_inc = get_hdr_inc(td, io_u);
677
678 ret = 0;
679 for (p = io_u->buf; p < io_u->buf + io_u->buflen;
680 p += hdr_inc, hdr_num++) {
681 struct vcont vc = {
682 .io_u = io_u,
683 .hdr_num = hdr_num,
684 .td = td,
685 };
686
687 if (ret && td->o.verify_fatal)
688 break;
689
690 header_size = __hdr_size(td->o.verify);
691 if (td->o.verify_offset)
692 memswp(p, p + td->o.verify_offset, header_size);
693 hdr = p;
694
695 if (hdr->fio_magic == FIO_HDR_MAGIC2) {
696 if (!verify_hdr_crc(hdr)) {
697 log_err("fio: bad crc on verify header.\n");
698 return EILSEQ;
699 }
700 } else if (hdr->fio_magic == FIO_HDR_MAGIC) {
701 log_err("fio: v1 headers no longer supported.\n");
702 log_err("fio: re-run the write workload.\n");
703 return EILSEQ;
704 } else {
705 log_err("verify: bad magic header %x, wanted %x at file %s offset %llu, length %u\n",
706 hdr->fio_magic, FIO_HDR_MAGIC2,
707 io_u->file->file_name,
708 io_u->offset + hdr_num * hdr->len, hdr->len);
709 return EILSEQ;
710 }
711
712 switch (hdr->verify_type) {
713 case VERIFY_MD5:
714 ret = verify_io_u_md5(hdr, &vc);
715 break;
716 case VERIFY_CRC64:
717 ret = verify_io_u_crc64(hdr, &vc);
718 break;
719 case VERIFY_CRC32C:
720 case VERIFY_CRC32C_INTEL:
721 ret = verify_io_u_crc32c(hdr, &vc);
722 break;
723 case VERIFY_CRC32:
724 ret = verify_io_u_crc32(hdr, &vc);
725 break;
726 case VERIFY_CRC16:
727 ret = verify_io_u_crc16(hdr, &vc);
728 break;
729 case VERIFY_CRC7:
730 ret = verify_io_u_crc7(hdr, &vc);
731 break;
732 case VERIFY_SHA256:
733 ret = verify_io_u_sha256(hdr, &vc);
734 break;
735 case VERIFY_SHA512:
736 ret = verify_io_u_sha512(hdr, &vc);
737 break;
738 case VERIFY_META:
739 ret = verify_io_u_meta(hdr, &vc);
740 break;
741 case VERIFY_SHA1:
742 ret = verify_io_u_sha1(hdr, &vc);
743 break;
744 case VERIFY_PATTERN:
745 ret = verify_io_u_pattern(hdr, &vc);
746 break;
747 default:
748 log_err("Bad verify type %u\n", hdr->verify_type);
749 ret = EINVAL;
750 }
751 }
752
753done:
754 if (ret && td->o.verify_fatal)
755 td->terminate = 1;
756
757 return ret;
758}
759
760static void fill_meta(struct verify_header *hdr, struct thread_data *td,
761 struct io_u *io_u, unsigned int header_num)
762{
763 struct vhdr_meta *vh = hdr_priv(hdr);
764
765 vh->thread = td->thread_number;
766
767 vh->time_sec = io_u->start_time.tv_sec;
768 vh->time_usec = io_u->start_time.tv_usec;
769
770 vh->numberio = td->io_issues[DDIR_WRITE];
771
772 vh->offset = io_u->offset + header_num * td->o.verify_interval;
773}
774
775static void fill_sha512(struct verify_header *hdr, void *p, unsigned int len)
776{
777 struct vhdr_sha512 *vh = hdr_priv(hdr);
778 struct sha512_ctx sha512_ctx = {
779 .buf = vh->sha512,
780 };
781
782 sha512_init(&sha512_ctx);
783 sha512_update(&sha512_ctx, p, len);
784}
785
786static void fill_sha256(struct verify_header *hdr, void *p, unsigned int len)
787{
788 struct vhdr_sha256 *vh = hdr_priv(hdr);
789 struct sha256_ctx sha256_ctx = {
790 .buf = vh->sha256,
791 };
792
793 sha256_init(&sha256_ctx);
794 sha256_update(&sha256_ctx, p, len);
795}
796
797static void fill_sha1(struct verify_header *hdr, void *p, unsigned int len)
798{
799 struct vhdr_sha1 *vh = hdr_priv(hdr);
800 struct sha1_ctx sha1_ctx = {
801 .H = vh->sha1,
802 };
803
804 sha1_init(&sha1_ctx);
805 sha1_update(&sha1_ctx, p, len);
806}
807
808static void fill_crc7(struct verify_header *hdr, void *p, unsigned int len)
809{
810 struct vhdr_crc7 *vh = hdr_priv(hdr);
811
812 vh->crc7 = crc7(p, len);
813}
814
815static void fill_crc16(struct verify_header *hdr, void *p, unsigned int len)
816{
817 struct vhdr_crc16 *vh = hdr_priv(hdr);
818
819 vh->crc16 = crc16(p, len);
820}
821
822static void fill_crc32(struct verify_header *hdr, void *p, unsigned int len)
823{
824 struct vhdr_crc32 *vh = hdr_priv(hdr);
825
826 vh->crc32 = crc32(p, len);
827}
828
829static void fill_crc32c(struct verify_header *hdr, void *p, unsigned int len)
830{
831 struct vhdr_crc32 *vh = hdr_priv(hdr);
832
833 vh->crc32 = crc32c(p, len);
834}
835
836static void fill_crc64(struct verify_header *hdr, void *p, unsigned int len)
837{
838 struct vhdr_crc64 *vh = hdr_priv(hdr);
839
840 vh->crc64 = crc64(p, len);
841}
842
843static void fill_md5(struct verify_header *hdr, void *p, unsigned int len)
844{
845 struct vhdr_md5 *vh = hdr_priv(hdr);
846 struct md5_ctx md5_ctx = {
847 .hash = (uint32_t *) vh->md5_digest,
848 };
849
850 md5_init(&md5_ctx);
851 md5_update(&md5_ctx, p, len);
852}
853
854static void populate_hdr(struct thread_data *td, struct io_u *io_u,
855 struct verify_header *hdr, unsigned int header_num,
856 unsigned int header_len)
857{
858 unsigned int data_len;
859 void *data, *p;
860
861 p = (void *) hdr;
862
863 hdr->fio_magic = FIO_HDR_MAGIC2;
864 hdr->len = header_len;
865 hdr->verify_type = td->o.verify;
866 hdr->pad1 = 0;
867 hdr->rand_seed = io_u->rand_seed;
868 hdr->pad2 = 0;
869 hdr->crc32 = crc32c(p, sizeof(*hdr) - sizeof(hdr->crc32));
870
871 data_len = header_len - hdr_size(hdr);
872
873 data = p + hdr_size(hdr);
874 switch (td->o.verify) {
875 case VERIFY_MD5:
876 dprint(FD_VERIFY, "fill md5 io_u %p, len %u\n",
877 io_u, hdr->len);
878 fill_md5(hdr, data, data_len);
879 break;
880 case VERIFY_CRC64:
881 dprint(FD_VERIFY, "fill crc64 io_u %p, len %u\n",
882 io_u, hdr->len);
883 fill_crc64(hdr, data, data_len);
884 break;
885 case VERIFY_CRC32C:
886 case VERIFY_CRC32C_INTEL:
887 dprint(FD_VERIFY, "fill crc32c io_u %p, len %u\n",
888 io_u, hdr->len);
889 fill_crc32c(hdr, data, data_len);
890 break;
891 case VERIFY_CRC32:
892 dprint(FD_VERIFY, "fill crc32 io_u %p, len %u\n",
893 io_u, hdr->len);
894 fill_crc32(hdr, data, data_len);
895 break;
896 case VERIFY_CRC16:
897 dprint(FD_VERIFY, "fill crc16 io_u %p, len %u\n",
898 io_u, hdr->len);
899 fill_crc16(hdr, data, data_len);
900 break;
901 case VERIFY_CRC7:
902 dprint(FD_VERIFY, "fill crc7 io_u %p, len %u\n",
903 io_u, hdr->len);
904 fill_crc7(hdr, data, data_len);
905 break;
906 case VERIFY_SHA256:
907 dprint(FD_VERIFY, "fill sha256 io_u %p, len %u\n",
908 io_u, hdr->len);
909 fill_sha256(hdr, data, data_len);
910 break;
911 case VERIFY_SHA512:
912 dprint(FD_VERIFY, "fill sha512 io_u %p, len %u\n",
913 io_u, hdr->len);
914 fill_sha512(hdr, data, data_len);
915 break;
916 case VERIFY_META:
917 dprint(FD_VERIFY, "fill meta io_u %p, len %u\n",
918 io_u, hdr->len);
919 fill_meta(hdr, td, io_u, header_num);
920 break;
921 case VERIFY_SHA1:
922 dprint(FD_VERIFY, "fill sha1 io_u %p, len %u\n",
923 io_u, hdr->len);
924 fill_sha1(hdr, data, data_len);
925 break;
926 case VERIFY_PATTERN:
927 /* nothing to do here */
928 break;
929 default:
930 log_err("fio: bad verify type: %d\n", td->o.verify);
931 assert(0);
932 }
933 if (td->o.verify_offset)
934 memswp(p, p + td->o.verify_offset, hdr_size(hdr));
935}
936
937/*
938 * fill body of io_u->buf with random data and add a header with the
939 * checksum of choice
940 */
941void populate_verify_io_u(struct thread_data *td, struct io_u *io_u)
942{
943 if (td->o.verify == VERIFY_NULL)
944 return;
945
946 fill_pattern_headers(td, io_u, 0, 0);
947}
948
949int get_next_verify(struct thread_data *td, struct io_u *io_u)
950{
951 struct io_piece *ipo = NULL;
952
953 /*
954 * this io_u is from a requeue, we already filled the offsets
955 */
956 if (io_u->file)
957 return 0;
958
959 if (!RB_EMPTY_ROOT(&td->io_hist_tree)) {
960 struct rb_node *n = rb_first(&td->io_hist_tree);
961
962 ipo = rb_entry(n, struct io_piece, rb_node);
963 rb_erase(n, &td->io_hist_tree);
964 assert(ipo->flags & IP_F_ONRB);
965 ipo->flags &= ~IP_F_ONRB;
966 } else if (!flist_empty(&td->io_hist_list)) {
967 ipo = flist_entry(td->io_hist_list.next, struct io_piece, list);
968 flist_del(&ipo->list);
969 assert(ipo->flags & IP_F_ONLIST);
970 ipo->flags &= ~IP_F_ONLIST;
971 }
972
973 if (ipo) {
974 td->io_hist_len--;
975
976 io_u->offset = ipo->offset;
977 io_u->buflen = ipo->len;
978 io_u->file = ipo->file;
979
980 if (ipo->flags & IP_F_TRIMMED)
981 io_u->flags |= IO_U_F_TRIMMED;
982
983 if (!fio_file_open(io_u->file)) {
984 int r = td_io_open_file(td, io_u->file);
985
986 if (r) {
987 dprint(FD_VERIFY, "failed file %s open\n",
988 io_u->file->file_name);
989 return 1;
990 }
991 }
992
993 get_file(ipo->file);
994 assert(fio_file_open(io_u->file));
995 io_u->ddir = DDIR_READ;
996 io_u->xfer_buf = io_u->buf;
997 io_u->xfer_buflen = io_u->buflen;
998
999 remove_trim_entry(td, ipo);
1000 free(ipo);
1001 dprint(FD_VERIFY, "get_next_verify: ret io_u %p\n", io_u);
1002 return 0;
1003 }
1004
1005 dprint(FD_VERIFY, "get_next_verify: empty\n");
1006 return 1;
1007}
1008
1009static void *verify_async_thread(void *data)
1010{
1011 struct thread_data *td = data;
1012 struct io_u *io_u;
1013 int ret = 0;
1014
1015 if (td->o.verify_cpumask_set &&
1016 fio_setaffinity(td->pid, td->o.verify_cpumask)) {
1017 log_err("fio: failed setting verify thread affinity\n");
1018 goto done;
1019 }
1020
1021 do {
1022 FLIST_HEAD(list);
1023
1024 read_barrier();
1025 if (td->verify_thread_exit)
1026 break;
1027
1028 pthread_mutex_lock(&td->io_u_lock);
1029
1030 while (flist_empty(&td->verify_list) &&
1031 !td->verify_thread_exit) {
1032 ret = pthread_cond_wait(&td->verify_cond,
1033 &td->io_u_lock);
1034 if (ret) {
1035 pthread_mutex_unlock(&td->io_u_lock);
1036 break;
1037 }
1038 }
1039
1040 flist_splice_init(&td->verify_list, &list);
1041 pthread_mutex_unlock(&td->io_u_lock);
1042
1043 if (flist_empty(&list))
1044 continue;
1045
1046 while (!flist_empty(&list)) {
1047 io_u = flist_entry(list.next, struct io_u, list);
1048 flist_del_init(&io_u->list);
1049
1050 ret = verify_io_u(td, io_u);
1051 put_io_u(td, io_u);
1052 if (!ret)
1053 continue;
1054 if (td->o.continue_on_error & ERROR_TYPE_VERIFY &&
1055 td_non_fatal_error(ret)) {
1056 update_error_count(td, ret);
1057 td_clear_error(td);
1058 ret = 0;
1059 }
1060 }
1061 } while (!ret);
1062
1063 if (ret) {
1064 td_verror(td, ret, "async_verify");
1065 if (td->o.verify_fatal)
1066 td->terminate = 1;
1067 }
1068
1069done:
1070 pthread_mutex_lock(&td->io_u_lock);
1071 td->nr_verify_threads--;
1072 pthread_mutex_unlock(&td->io_u_lock);
1073
1074 pthread_cond_signal(&td->free_cond);
1075 return NULL;
1076}
1077
1078int verify_async_init(struct thread_data *td)
1079{
1080 int i, ret;
1081 pthread_attr_t attr;
1082
1083 pthread_attr_init(&attr);
1084 pthread_attr_setstacksize(&attr, PTHREAD_STACK_MIN);
1085
1086 td->verify_thread_exit = 0;
1087
1088 td->verify_threads = malloc(sizeof(pthread_t) * td->o.verify_async);
1089 for (i = 0; i < td->o.verify_async; i++) {
1090 ret = pthread_create(&td->verify_threads[i], &attr,
1091 verify_async_thread, td);
1092 if (ret) {
1093 log_err("fio: async verify creation failed: %s\n",
1094 strerror(ret));
1095 break;
1096 }
1097 ret = pthread_detach(td->verify_threads[i]);
1098 if (ret) {
1099 log_err("fio: async verify thread detach failed: %s\n",
1100 strerror(ret));
1101 break;
1102 }
1103 td->nr_verify_threads++;
1104 }
1105
1106 pthread_attr_destroy(&attr);
1107
1108 if (i != td->o.verify_async) {
1109 log_err("fio: only %d verify threads started, exiting\n", i);
1110 td->verify_thread_exit = 1;
1111 write_barrier();
1112 pthread_cond_broadcast(&td->verify_cond);
1113 return 1;
1114 }
1115
1116 return 0;
1117}
1118
1119void verify_async_exit(struct thread_data *td)
1120{
1121 td->verify_thread_exit = 1;
1122 write_barrier();
1123 pthread_cond_broadcast(&td->verify_cond);
1124
1125 pthread_mutex_lock(&td->io_u_lock);
1126
1127 while (td->nr_verify_threads)
1128 pthread_cond_wait(&td->free_cond, &td->io_u_lock);
1129
1130 pthread_mutex_unlock(&td->io_u_lock);
1131 free(td->verify_threads);
1132 td->verify_threads = NULL;
1133}
fio - Flexible IO Tester