debug: remove extra parens
[fio.git] / verify.c
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 #include "lib/pattern.h"
17
18 #include "crc/md5.h"
19 #include "crc/crc64.h"
20 #include "crc/crc32.h"
21 #include "crc/crc32c.h"
22 #include "crc/crc16.h"
23 #include "crc/crc7.h"
24 #include "crc/sha256.h"
25 #include "crc/sha512.h"
26 #include "crc/sha1.h"
27 #include "crc/xxhash.h"
28 #include "crc/sha3.h"
29
30 static void populate_hdr(struct thread_data *td, struct io_u *io_u,
31                          struct verify_header *hdr, unsigned int header_num,
32                          unsigned int header_len);
33 static void __fill_hdr(struct thread_data *td, struct io_u *io_u,
34                        struct verify_header *hdr, unsigned int header_num,
35                        unsigned int header_len, uint64_t rand_seed);
36
37 void fill_buffer_pattern(struct thread_data *td, void *p, unsigned int len)
38 {
39         (void)cpy_pattern(td->o.buffer_pattern, td->o.buffer_pattern_bytes, p, len);
40 }
41
42 static void __fill_buffer(struct thread_options *o, unsigned long seed, void *p,
43                           unsigned int len)
44 {
45         __fill_random_buf_percentage(seed, p, o->compress_percentage, len, len, o->buffer_pattern, o->buffer_pattern_bytes);
46 }
47
48 static unsigned long fill_buffer(struct thread_data *td, void *p,
49                                  unsigned int len)
50 {
51         struct frand_state *fs = &td->verify_state;
52         struct thread_options *o = &td->o;
53
54         return fill_random_buf_percentage(fs, p, o->compress_percentage, len, len, o->buffer_pattern, o->buffer_pattern_bytes);
55 }
56
57 void fill_verify_pattern(struct thread_data *td, void *p, unsigned int len,
58                          struct io_u *io_u, unsigned long seed, int use_seed)
59 {
60         struct thread_options *o = &td->o;
61
62         if (!o->verify_pattern_bytes) {
63                 dprint(FD_VERIFY, "fill random bytes len=%u\n", len);
64
65                 if (use_seed)
66                         __fill_buffer(o, seed, p, len);
67                 else
68                         io_u->rand_seed = fill_buffer(td, p, len);
69                 return;
70         }
71
72         /* Skip if we were here and we do not need to patch pattern
73          * with format */
74         if (!td->o.verify_fmt_sz && io_u->buf_filled_len >= len) {
75                 dprint(FD_VERIFY, "using already filled verify pattern b=%d len=%u\n",
76                         o->verify_pattern_bytes, len);
77                 return;
78         }
79
80         (void)paste_format(td->o.verify_pattern, td->o.verify_pattern_bytes,
81                            td->o.verify_fmt, td->o.verify_fmt_sz,
82                            p, len, io_u);
83         io_u->buf_filled_len = len;
84 }
85
86 static unsigned int get_hdr_inc(struct thread_data *td, struct io_u *io_u)
87 {
88         unsigned int hdr_inc;
89
90         /*
91          * If we use bs_unaligned, buflen can be larger than the verify
92          * interval (which just defaults to the smallest blocksize possible).
93          */
94         hdr_inc = io_u->buflen;
95         if (td->o.verify_interval && td->o.verify_interval <= io_u->buflen &&
96             !td->o.bs_unaligned)
97                 hdr_inc = td->o.verify_interval;
98
99         return hdr_inc;
100 }
101
102 static void fill_pattern_headers(struct thread_data *td, struct io_u *io_u,
103                                  unsigned long seed, int use_seed)
104 {
105         unsigned int hdr_inc, header_num;
106         struct verify_header *hdr;
107         void *p = io_u->buf;
108
109         fill_verify_pattern(td, p, io_u->buflen, io_u, seed, use_seed);
110
111         hdr_inc = get_hdr_inc(td, io_u);
112         header_num = 0;
113         for (; p < io_u->buf + io_u->buflen; p += hdr_inc) {
114                 hdr = p;
115                 populate_hdr(td, io_u, hdr, header_num, hdr_inc);
116                 header_num++;
117         }
118 }
119
120 static void memswp(void *buf1, void *buf2, unsigned int len)
121 {
122         char swap[200];
123
124         assert(len <= sizeof(swap));
125
126         memcpy(&swap, buf1, len);
127         memcpy(buf1, buf2, len);
128         memcpy(buf2, &swap, len);
129 }
130
131 static void hexdump(void *buffer, int len)
132 {
133         unsigned char *p = buffer;
134         int i;
135
136         for (i = 0; i < len; i++)
137                 log_err("%02x", p[i]);
138         log_err("\n");
139 }
140
141 /*
142  * Prepare for separation of verify_header and checksum header
143  */
144 static inline unsigned int __hdr_size(int verify_type)
145 {
146         unsigned int len = 0;
147
148         switch (verify_type) {
149         case VERIFY_NONE:
150         case VERIFY_HDR_ONLY:
151         case VERIFY_NULL:
152         case VERIFY_PATTERN:
153                 len = 0;
154                 break;
155         case VERIFY_MD5:
156                 len = sizeof(struct vhdr_md5);
157                 break;
158         case VERIFY_CRC64:
159                 len = sizeof(struct vhdr_crc64);
160                 break;
161         case VERIFY_CRC32C:
162         case VERIFY_CRC32:
163         case VERIFY_CRC32C_INTEL:
164                 len = sizeof(struct vhdr_crc32);
165                 break;
166         case VERIFY_CRC16:
167                 len = sizeof(struct vhdr_crc16);
168                 break;
169         case VERIFY_CRC7:
170                 len = sizeof(struct vhdr_crc7);
171                 break;
172         case VERIFY_SHA256:
173                 len = sizeof(struct vhdr_sha256);
174                 break;
175         case VERIFY_SHA512:
176                 len = sizeof(struct vhdr_sha512);
177                 break;
178         case VERIFY_SHA3_224:
179                 len = sizeof(struct vhdr_sha3_224);
180                 break;
181         case VERIFY_SHA3_256:
182                 len = sizeof(struct vhdr_sha3_256);
183                 break;
184         case VERIFY_SHA3_384:
185                 len = sizeof(struct vhdr_sha3_384);
186                 break;
187         case VERIFY_SHA3_512:
188                 len = sizeof(struct vhdr_sha3_512);
189                 break;
190         case VERIFY_XXHASH:
191                 len = sizeof(struct vhdr_xxhash);
192                 break;
193         case VERIFY_SHA1:
194                 len = sizeof(struct vhdr_sha1);
195                 break;
196         case VERIFY_PATTERN_NO_HDR:
197                 return 0;
198         default:
199                 log_err("fio: unknown verify header!\n");
200                 assert(0);
201         }
202
203         return len + sizeof(struct verify_header);
204 }
205
206 static inline unsigned int hdr_size(struct thread_data *td,
207                                     struct verify_header *hdr)
208 {
209         if (td->o.verify == VERIFY_PATTERN_NO_HDR)
210                 return 0;
211
212         return __hdr_size(hdr->verify_type);
213 }
214
215 static void *hdr_priv(struct verify_header *hdr)
216 {
217         void *priv = hdr;
218
219         return priv + sizeof(struct verify_header);
220 }
221
222 /*
223  * Verify container, pass info to verify handlers and allow them to
224  * pass info back in case of error
225  */
226 struct vcont {
227         /*
228          * Input
229          */
230         struct io_u *io_u;
231         unsigned int hdr_num;
232         struct thread_data *td;
233
234         /*
235          * Output, only valid in case of error
236          */
237         const char *name;
238         void *good_crc;
239         void *bad_crc;
240         unsigned int crc_len;
241 };
242
243 #define DUMP_BUF_SZ     255
244
245 static void dump_buf(char *buf, unsigned int len, unsigned long long offset,
246                      const char *type, struct fio_file *f)
247 {
248         char *ptr, fname[DUMP_BUF_SZ];
249         size_t buf_left = DUMP_BUF_SZ;
250         int ret, fd;
251
252         ptr = strdup(f->file_name);
253
254         memset(fname, 0, sizeof(fname));
255         if (aux_path)
256                 sprintf(fname, "%s%c", aux_path, FIO_OS_PATH_SEPARATOR);
257
258         strncpy(fname + strlen(fname), basename(ptr), buf_left - 1);
259
260         buf_left -= strlen(fname);
261         if (buf_left <= 0) {
262                 if (!fio_did_warn(FIO_WARN_VERIFY_BUF))
263                         log_err("fio: verify failure dump buffer too small\n");
264                 free(ptr);
265                 return;
266         }
267
268         snprintf(fname + strlen(fname), buf_left, ".%llu.%s", offset, type);
269
270         fd = open(fname, O_CREAT | O_TRUNC | O_WRONLY, 0644);
271         if (fd < 0) {
272                 perror("open verify buf file");
273                 free(ptr);
274                 return;
275         }
276
277         while (len) {
278                 ret = write(fd, buf, len);
279                 if (!ret)
280                         break;
281                 else if (ret < 0) {
282                         perror("write verify buf file");
283                         break;
284                 }
285                 len -= ret;
286                 buf += ret;
287         }
288
289         close(fd);
290         log_err("       %s data dumped as %s\n", type, fname);
291         free(ptr);
292 }
293
294 /*
295  * Dump the contents of the read block and re-generate the correct data
296  * and dump that too.
297  */
298 static void __dump_verify_buffers(struct verify_header *hdr, struct vcont *vc)
299 {
300         struct thread_data *td = vc->td;
301         struct io_u *io_u = vc->io_u;
302         unsigned long hdr_offset;
303         struct io_u dummy;
304         void *buf;
305
306         if (!td->o.verify_dump)
307                 return;
308
309         /*
310          * Dump the contents we just read off disk
311          */
312         hdr_offset = vc->hdr_num * hdr->len;
313
314         dump_buf(io_u->buf + hdr_offset, hdr->len, io_u->offset + hdr_offset,
315                         "received", vc->io_u->file);
316
317         /*
318          * Allocate a new buf and re-generate the original data
319          */
320         buf = malloc(io_u->buflen);
321         dummy = *io_u;
322         dummy.buf = buf;
323         dummy.rand_seed = hdr->rand_seed;
324         dummy.buf_filled_len = 0;
325         dummy.buflen = io_u->buflen;
326
327         fill_pattern_headers(td, &dummy, hdr->rand_seed, 1);
328
329         dump_buf(buf + hdr_offset, hdr->len, io_u->offset + hdr_offset,
330                         "expected", vc->io_u->file);
331         free(buf);
332 }
333
334 static void dump_verify_buffers(struct verify_header *hdr, struct vcont *vc)
335 {
336         struct thread_data *td = vc->td;
337         struct verify_header shdr;
338
339         if (td->o.verify == VERIFY_PATTERN_NO_HDR) {
340                 __fill_hdr(td, vc->io_u, &shdr, 0, vc->io_u->buflen, 0);
341                 hdr = &shdr;
342         }
343
344         __dump_verify_buffers(hdr, vc);
345 }
346
347 static void log_verify_failure(struct verify_header *hdr, struct vcont *vc)
348 {
349         unsigned long long offset;
350
351         offset = vc->io_u->offset;
352         offset += vc->hdr_num * hdr->len;
353         log_err("%.8s: verify failed at file %s offset %llu, length %u\n",
354                         vc->name, vc->io_u->file->file_name, offset, hdr->len);
355
356         if (vc->good_crc && vc->bad_crc) {
357                 log_err("       Expected CRC: ");
358                 hexdump(vc->good_crc, vc->crc_len);
359                 log_err("       Received CRC: ");
360                 hexdump(vc->bad_crc, vc->crc_len);
361         }
362
363         dump_verify_buffers(hdr, vc);
364 }
365
366 /*
367  * Return data area 'header_num'
368  */
369 static inline void *io_u_verify_off(struct verify_header *hdr, struct vcont *vc)
370 {
371         return vc->io_u->buf + vc->hdr_num * hdr->len + hdr_size(vc->td, hdr);
372 }
373
374 static int verify_io_u_pattern(struct verify_header *hdr, struct vcont *vc)
375 {
376         struct thread_data *td = vc->td;
377         struct io_u *io_u = vc->io_u;
378         char *buf, *pattern;
379         unsigned int header_size = __hdr_size(td->o.verify);
380         unsigned int len, mod, i, pattern_size;
381         int rc;
382
383         pattern = td->o.verify_pattern;
384         pattern_size = td->o.verify_pattern_bytes;
385         assert(pattern_size != 0);
386
387         (void)paste_format_inplace(pattern, pattern_size,
388                                    td->o.verify_fmt, td->o.verify_fmt_sz, io_u);
389
390         buf = (char *) hdr + header_size;
391         len = get_hdr_inc(td, io_u) - header_size;
392         mod = (get_hdr_inc(td, io_u) * vc->hdr_num + header_size) % pattern_size;
393
394         rc = cmp_pattern(pattern, pattern_size, mod, buf, len);
395         if (!rc)
396                 return 0;
397
398         /* Slow path, compare each byte */
399         for (i = 0; i < len; i++) {
400                 if (buf[i] != pattern[mod]) {
401                         unsigned int bits;
402
403                         bits = hweight8(buf[i] ^ pattern[mod]);
404                         log_err("fio: got pattern '%02x', wanted '%02x'. Bad bits %d\n",
405                                 (unsigned char)buf[i],
406                                 (unsigned char)pattern[mod],
407                                 bits);
408                         log_err("fio: bad pattern block offset %u\n", i);
409                         vc->name = "pattern";
410                         log_verify_failure(hdr, vc);
411                         return EILSEQ;
412                 }
413                 mod++;
414                 if (mod == td->o.verify_pattern_bytes)
415                         mod = 0;
416         }
417
418         /* Unreachable line */
419         assert(0);
420         return EILSEQ;
421 }
422
423 static int verify_io_u_xxhash(struct verify_header *hdr, struct vcont *vc)
424 {
425         void *p = io_u_verify_off(hdr, vc);
426         struct vhdr_xxhash *vh = hdr_priv(hdr);
427         uint32_t hash;
428         void *state;
429
430         dprint(FD_VERIFY, "xxhash verify io_u %p, len %u\n", vc->io_u, hdr->len);
431
432         state = XXH32_init(1);
433         XXH32_update(state, p, hdr->len - hdr_size(vc->td, hdr));
434         hash = XXH32_digest(state);
435
436         if (vh->hash == hash)
437                 return 0;
438
439         vc->name = "xxhash";
440         vc->good_crc = &vh->hash;
441         vc->bad_crc = &hash;
442         vc->crc_len = sizeof(hash);
443         log_verify_failure(hdr, vc);
444         return EILSEQ;
445 }
446
447 static int verify_io_u_sha3(struct verify_header *hdr, struct vcont *vc,
448                             struct fio_sha3_ctx *sha3_ctx, uint8_t *sha,
449                             unsigned int sha_size, const char *name)
450 {
451         void *p = io_u_verify_off(hdr, vc);
452
453         dprint(FD_VERIFY, "%s verify io_u %p, len %u\n", name, vc->io_u, hdr->len);
454
455         fio_sha3_update(sha3_ctx, p, hdr->len - hdr_size(vc->td, hdr));
456         fio_sha3_final(sha3_ctx);
457
458         if (!memcmp(sha, sha3_ctx->sha, sha_size))
459                 return 0;
460
461         vc->name = name;
462         vc->good_crc = sha;
463         vc->bad_crc = sha3_ctx->sha;
464         vc->crc_len = sha_size;
465         log_verify_failure(hdr, vc);
466         return EILSEQ;
467 }
468
469 static int verify_io_u_sha3_224(struct verify_header *hdr, struct vcont *vc)
470 {
471         struct vhdr_sha3_224 *vh = hdr_priv(hdr);
472         uint8_t sha[SHA3_224_DIGEST_SIZE];
473         struct fio_sha3_ctx sha3_ctx = {
474                 .sha = sha,
475         };
476
477         fio_sha3_224_init(&sha3_ctx);
478
479         return verify_io_u_sha3(hdr, vc, &sha3_ctx, vh->sha,
480                                 SHA3_224_DIGEST_SIZE, "sha3-224");
481 }
482
483 static int verify_io_u_sha3_256(struct verify_header *hdr, struct vcont *vc)
484 {
485         struct vhdr_sha3_256 *vh = hdr_priv(hdr);
486         uint8_t sha[SHA3_256_DIGEST_SIZE];
487         struct fio_sha3_ctx sha3_ctx = {
488                 .sha = sha,
489         };
490
491         fio_sha3_256_init(&sha3_ctx);
492
493         return verify_io_u_sha3(hdr, vc, &sha3_ctx, vh->sha,
494                                 SHA3_256_DIGEST_SIZE, "sha3-256");
495 }
496
497 static int verify_io_u_sha3_384(struct verify_header *hdr, struct vcont *vc)
498 {
499         struct vhdr_sha3_384 *vh = hdr_priv(hdr);
500         uint8_t sha[SHA3_384_DIGEST_SIZE];
501         struct fio_sha3_ctx sha3_ctx = {
502                 .sha = sha,
503         };
504
505         fio_sha3_384_init(&sha3_ctx);
506
507         return verify_io_u_sha3(hdr, vc, &sha3_ctx, vh->sha,
508                                 SHA3_384_DIGEST_SIZE, "sha3-384");
509 }
510
511 static int verify_io_u_sha3_512(struct verify_header *hdr, struct vcont *vc)
512 {
513         struct vhdr_sha3_512 *vh = hdr_priv(hdr);
514         uint8_t sha[SHA3_512_DIGEST_SIZE];
515         struct fio_sha3_ctx sha3_ctx = {
516                 .sha = sha,
517         };
518
519         fio_sha3_512_init(&sha3_ctx);
520
521         return verify_io_u_sha3(hdr, vc, &sha3_ctx, vh->sha,
522                                 SHA3_512_DIGEST_SIZE, "sha3-512");
523 }
524
525 static int verify_io_u_sha512(struct verify_header *hdr, struct vcont *vc)
526 {
527         void *p = io_u_verify_off(hdr, vc);
528         struct vhdr_sha512 *vh = hdr_priv(hdr);
529         uint8_t sha512[128];
530         struct fio_sha512_ctx sha512_ctx = {
531                 .buf = sha512,
532         };
533
534         dprint(FD_VERIFY, "sha512 verify io_u %p, len %u\n", vc->io_u, hdr->len);
535
536         fio_sha512_init(&sha512_ctx);
537         fio_sha512_update(&sha512_ctx, p, hdr->len - hdr_size(vc->td, hdr));
538
539         if (!memcmp(vh->sha512, sha512_ctx.buf, sizeof(sha512)))
540                 return 0;
541
542         vc->name = "sha512";
543         vc->good_crc = vh->sha512;
544         vc->bad_crc = sha512_ctx.buf;
545         vc->crc_len = sizeof(vh->sha512);
546         log_verify_failure(hdr, vc);
547         return EILSEQ;
548 }
549
550 static int verify_io_u_sha256(struct verify_header *hdr, struct vcont *vc)
551 {
552         void *p = io_u_verify_off(hdr, vc);
553         struct vhdr_sha256 *vh = hdr_priv(hdr);
554         uint8_t sha256[64];
555         struct fio_sha256_ctx sha256_ctx = {
556                 .buf = sha256,
557         };
558
559         dprint(FD_VERIFY, "sha256 verify io_u %p, len %u\n", vc->io_u, hdr->len);
560
561         fio_sha256_init(&sha256_ctx);
562         fio_sha256_update(&sha256_ctx, p, hdr->len - hdr_size(vc->td, hdr));
563         fio_sha256_final(&sha256_ctx);
564
565         if (!memcmp(vh->sha256, sha256_ctx.buf, sizeof(sha256)))
566                 return 0;
567
568         vc->name = "sha256";
569         vc->good_crc = vh->sha256;
570         vc->bad_crc = sha256_ctx.buf;
571         vc->crc_len = sizeof(vh->sha256);
572         log_verify_failure(hdr, vc);
573         return EILSEQ;
574 }
575
576 static int verify_io_u_sha1(struct verify_header *hdr, struct vcont *vc)
577 {
578         void *p = io_u_verify_off(hdr, vc);
579         struct vhdr_sha1 *vh = hdr_priv(hdr);
580         uint32_t sha1[5];
581         struct fio_sha1_ctx sha1_ctx = {
582                 .H = sha1,
583         };
584
585         dprint(FD_VERIFY, "sha1 verify io_u %p, len %u\n", vc->io_u, hdr->len);
586
587         fio_sha1_init(&sha1_ctx);
588         fio_sha1_update(&sha1_ctx, p, hdr->len - hdr_size(vc->td, hdr));
589         fio_sha1_final(&sha1_ctx);
590
591         if (!memcmp(vh->sha1, sha1_ctx.H, sizeof(sha1)))
592                 return 0;
593
594         vc->name = "sha1";
595         vc->good_crc = vh->sha1;
596         vc->bad_crc = sha1_ctx.H;
597         vc->crc_len = sizeof(vh->sha1);
598         log_verify_failure(hdr, vc);
599         return EILSEQ;
600 }
601
602 static int verify_io_u_crc7(struct verify_header *hdr, struct vcont *vc)
603 {
604         void *p = io_u_verify_off(hdr, vc);
605         struct vhdr_crc7 *vh = hdr_priv(hdr);
606         unsigned char c;
607
608         dprint(FD_VERIFY, "crc7 verify io_u %p, len %u\n", vc->io_u, hdr->len);
609
610         c = fio_crc7(p, hdr->len - hdr_size(vc->td, hdr));
611
612         if (c == vh->crc7)
613                 return 0;
614
615         vc->name = "crc7";
616         vc->good_crc = &vh->crc7;
617         vc->bad_crc = &c;
618         vc->crc_len = 1;
619         log_verify_failure(hdr, vc);
620         return EILSEQ;
621 }
622
623 static int verify_io_u_crc16(struct verify_header *hdr, struct vcont *vc)
624 {
625         void *p = io_u_verify_off(hdr, vc);
626         struct vhdr_crc16 *vh = hdr_priv(hdr);
627         unsigned short c;
628
629         dprint(FD_VERIFY, "crc16 verify io_u %p, len %u\n", vc->io_u, hdr->len);
630
631         c = fio_crc16(p, hdr->len - hdr_size(vc->td, hdr));
632
633         if (c == vh->crc16)
634                 return 0;
635
636         vc->name = "crc16";
637         vc->good_crc = &vh->crc16;
638         vc->bad_crc = &c;
639         vc->crc_len = 2;
640         log_verify_failure(hdr, vc);
641         return EILSEQ;
642 }
643
644 static int verify_io_u_crc64(struct verify_header *hdr, struct vcont *vc)
645 {
646         void *p = io_u_verify_off(hdr, vc);
647         struct vhdr_crc64 *vh = hdr_priv(hdr);
648         unsigned long long c;
649
650         dprint(FD_VERIFY, "crc64 verify io_u %p, len %u\n", vc->io_u, hdr->len);
651
652         c = fio_crc64(p, hdr->len - hdr_size(vc->td, hdr));
653
654         if (c == vh->crc64)
655                 return 0;
656
657         vc->name = "crc64";
658         vc->good_crc = &vh->crc64;
659         vc->bad_crc = &c;
660         vc->crc_len = 8;
661         log_verify_failure(hdr, vc);
662         return EILSEQ;
663 }
664
665 static int verify_io_u_crc32(struct verify_header *hdr, struct vcont *vc)
666 {
667         void *p = io_u_verify_off(hdr, vc);
668         struct vhdr_crc32 *vh = hdr_priv(hdr);
669         uint32_t c;
670
671         dprint(FD_VERIFY, "crc32 verify io_u %p, len %u\n", vc->io_u, hdr->len);
672
673         c = fio_crc32(p, hdr->len - hdr_size(vc->td, hdr));
674
675         if (c == vh->crc32)
676                 return 0;
677
678         vc->name = "crc32";
679         vc->good_crc = &vh->crc32;
680         vc->bad_crc = &c;
681         vc->crc_len = 4;
682         log_verify_failure(hdr, vc);
683         return EILSEQ;
684 }
685
686 static int verify_io_u_crc32c(struct verify_header *hdr, struct vcont *vc)
687 {
688         void *p = io_u_verify_off(hdr, vc);
689         struct vhdr_crc32 *vh = hdr_priv(hdr);
690         uint32_t c;
691
692         dprint(FD_VERIFY, "crc32c verify io_u %p, len %u\n", vc->io_u, hdr->len);
693
694         c = fio_crc32c(p, hdr->len - hdr_size(vc->td, hdr));
695
696         if (c == vh->crc32)
697                 return 0;
698
699         vc->name = "crc32c";
700         vc->good_crc = &vh->crc32;
701         vc->bad_crc = &c;
702         vc->crc_len = 4;
703         log_verify_failure(hdr, vc);
704         return EILSEQ;
705 }
706
707 static int verify_io_u_md5(struct verify_header *hdr, struct vcont *vc)
708 {
709         void *p = io_u_verify_off(hdr, vc);
710         struct vhdr_md5 *vh = hdr_priv(hdr);
711         uint32_t hash[MD5_HASH_WORDS];
712         struct fio_md5_ctx md5_ctx = {
713                 .hash = hash,
714         };
715
716         dprint(FD_VERIFY, "md5 verify io_u %p, len %u\n", vc->io_u, hdr->len);
717
718         fio_md5_init(&md5_ctx);
719         fio_md5_update(&md5_ctx, p, hdr->len - hdr_size(vc->td, hdr));
720         fio_md5_final(&md5_ctx);
721
722         if (!memcmp(vh->md5_digest, md5_ctx.hash, sizeof(hash)))
723                 return 0;
724
725         vc->name = "md5";
726         vc->good_crc = vh->md5_digest;
727         vc->bad_crc = md5_ctx.hash;
728         vc->crc_len = sizeof(hash);
729         log_verify_failure(hdr, vc);
730         return EILSEQ;
731 }
732
733 /*
734  * Push IO verification to a separate thread
735  */
736 int verify_io_u_async(struct thread_data *td, struct io_u **io_u_ptr)
737 {
738         struct io_u *io_u = *io_u_ptr;
739
740         pthread_mutex_lock(&td->io_u_lock);
741
742         if (io_u->file)
743                 put_file_log(td, io_u->file);
744
745         if (io_u->flags & IO_U_F_IN_CUR_DEPTH) {
746                 td->cur_depth--;
747                 io_u_clear(td, io_u, IO_U_F_IN_CUR_DEPTH);
748         }
749         flist_add_tail(&io_u->verify_list, &td->verify_list);
750         *io_u_ptr = NULL;
751
752         pthread_cond_signal(&td->verify_cond);
753         pthread_mutex_unlock(&td->io_u_lock);
754         return 0;
755 }
756
757 /*
758  * Thanks Rusty, for spending the time so I don't have to.
759  *
760  * http://rusty.ozlabs.org/?p=560
761  */
762 static int mem_is_zero(const void *data, size_t length)
763 {
764         const unsigned char *p = data;
765         size_t len;
766
767         /* Check first 16 bytes manually */
768         for (len = 0; len < 16; len++) {
769                 if (!length)
770                         return 1;
771                 if (*p)
772                         return 0;
773                 p++;
774                 length--;
775         }
776
777         /* Now we know that's zero, memcmp with self. */
778         return memcmp(data, p, length) == 0;
779 }
780
781 static int mem_is_zero_slow(const void *data, size_t length, size_t *offset)
782 {
783         const unsigned char *p = data;
784
785         *offset = 0;
786         while (length) {
787                 if (*p)
788                         break;
789                 (*offset)++;
790                 length--;
791                 p++;
792         }
793
794         return !length;
795 }
796
797 static int verify_trimmed_io_u(struct thread_data *td, struct io_u *io_u)
798 {
799         size_t offset;
800
801         if (!td->o.trim_zero)
802                 return 0;
803
804         if (mem_is_zero(io_u->buf, io_u->buflen))
805                 return 0;
806
807         mem_is_zero_slow(io_u->buf, io_u->buflen, &offset);
808
809         log_err("trim: verify failed at file %s offset %llu, length %lu"
810                 ", block offset %lu\n",
811                         io_u->file->file_name, io_u->offset, io_u->buflen,
812                         (unsigned long) offset);
813         return EILSEQ;
814 }
815
816 static int verify_header(struct io_u *io_u, struct thread_data *td,
817                          struct verify_header *hdr, unsigned int hdr_num,
818                          unsigned int hdr_len)
819 {
820         void *p = hdr;
821         uint32_t crc;
822
823         if (hdr->magic != FIO_HDR_MAGIC) {
824                 log_err("verify: bad magic header %x, wanted %x",
825                         hdr->magic, FIO_HDR_MAGIC);
826                 goto err;
827         }
828         if (hdr->len != hdr_len) {
829                 log_err("verify: bad header length %u, wanted %u",
830                         hdr->len, hdr_len);
831                 goto err;
832         }
833         if (hdr->rand_seed != io_u->rand_seed) {
834                 log_err("verify: bad header rand_seed %"PRIu64
835                         ", wanted %"PRIu64,
836                         hdr->rand_seed, io_u->rand_seed);
837                 goto err;
838         }
839         if (hdr->offset != io_u->offset + hdr_num * td->o.verify_interval) {
840                 log_err("verify: bad header offset %"PRIu64
841                         ", wanted %llu",
842                         hdr->offset, io_u->offset);
843                 goto err;
844         }
845
846         /*
847          * For read-only workloads, the program cannot be certain of the
848          * last numberio written to a block. Checking of numberio will be
849          * done only for workloads that write data.  For verify_only,
850          * numberio will be checked in the last iteration when the correct
851          * state of numberio, that would have been written to each block
852          * in a previous run of fio, has been reached.
853          */
854         if (td_write(td) && (td_min_bs(td) == td_max_bs(td)) &&
855             !td->o.time_based)
856                 if (!td->o.verify_only || td->o.loops == 0)
857                         if (hdr->numberio != io_u->numberio) {
858                                 log_err("verify: bad header numberio %"PRIu16
859                                         ", wanted %"PRIu16,
860                                         hdr->numberio, io_u->numberio);
861                                 goto err;
862                         }
863
864         crc = fio_crc32c(p, offsetof(struct verify_header, crc32));
865         if (crc != hdr->crc32) {
866                 log_err("verify: bad header crc %x, calculated %x",
867                         hdr->crc32, crc);
868                 goto err;
869         }
870         return 0;
871
872 err:
873         log_err(" at file %s offset %llu, length %u\n",
874                 io_u->file->file_name,
875                 io_u->offset + hdr_num * hdr_len, hdr_len);
876
877         if (td->o.verify_dump)
878                 dump_buf(p, hdr_len, io_u->offset + hdr_num * hdr_len,
879                                 "hdr_fail", io_u->file);
880
881         return EILSEQ;
882 }
883
884 int verify_io_u(struct thread_data *td, struct io_u **io_u_ptr)
885 {
886         struct verify_header *hdr;
887         struct io_u *io_u = *io_u_ptr;
888         unsigned int header_size, hdr_inc, hdr_num = 0;
889         void *p;
890         int ret;
891
892         if (td->o.verify == VERIFY_NULL || io_u->ddir != DDIR_READ)
893                 return 0;
894         /*
895          * If the IO engine is faking IO (like null), then just pretend
896          * we verified everything.
897          */
898         if (td_ioengine_flagged(td, FIO_FAKEIO))
899                 return 0;
900
901         if (io_u->flags & IO_U_F_TRIMMED) {
902                 ret = verify_trimmed_io_u(td, io_u);
903                 goto done;
904         }
905
906         hdr_inc = get_hdr_inc(td, io_u);
907
908         ret = 0;
909         for (p = io_u->buf; p < io_u->buf + io_u->buflen;
910              p += hdr_inc, hdr_num++) {
911                 struct vcont vc = {
912                         .io_u           = io_u,
913                         .hdr_num        = hdr_num,
914                         .td             = td,
915                 };
916                 unsigned int verify_type;
917
918                 if (ret && td->o.verify_fatal)
919                         break;
920
921                 header_size = __hdr_size(td->o.verify);
922                 if (td->o.verify_offset)
923                         memswp(p, p + td->o.verify_offset, header_size);
924                 hdr = p;
925
926                 /*
927                  * Make rand_seed check pass when have verifysort or
928                  * verify_backlog.
929                  */
930                 if (td->o.verifysort || (td->flags & TD_F_VER_BACKLOG))
931                         io_u->rand_seed = hdr->rand_seed;
932
933                 if (td->o.verify != VERIFY_PATTERN_NO_HDR) {
934                         ret = verify_header(io_u, td, hdr, hdr_num, hdr_inc);
935                         if (ret)
936                                 return ret;
937                 }
938
939                 if (td->o.verify != VERIFY_NONE)
940                         verify_type = td->o.verify;
941                 else
942                         verify_type = hdr->verify_type;
943
944                 switch (verify_type) {
945                 case VERIFY_HDR_ONLY:
946                         /* Header is always verified, check if pattern is left
947                          * for verification. */
948                         if (td->o.verify_pattern_bytes)
949                                 ret = verify_io_u_pattern(hdr, &vc);
950                         break;
951                 case VERIFY_MD5:
952                         ret = verify_io_u_md5(hdr, &vc);
953                         break;
954                 case VERIFY_CRC64:
955                         ret = verify_io_u_crc64(hdr, &vc);
956                         break;
957                 case VERIFY_CRC32C:
958                 case VERIFY_CRC32C_INTEL:
959                         ret = verify_io_u_crc32c(hdr, &vc);
960                         break;
961                 case VERIFY_CRC32:
962                         ret = verify_io_u_crc32(hdr, &vc);
963                         break;
964                 case VERIFY_CRC16:
965                         ret = verify_io_u_crc16(hdr, &vc);
966                         break;
967                 case VERIFY_CRC7:
968                         ret = verify_io_u_crc7(hdr, &vc);
969                         break;
970                 case VERIFY_SHA256:
971                         ret = verify_io_u_sha256(hdr, &vc);
972                         break;
973                 case VERIFY_SHA512:
974                         ret = verify_io_u_sha512(hdr, &vc);
975                         break;
976                 case VERIFY_SHA3_224:
977                         ret = verify_io_u_sha3_224(hdr, &vc);
978                         break;
979                 case VERIFY_SHA3_256:
980                         ret = verify_io_u_sha3_256(hdr, &vc);
981                         break;
982                 case VERIFY_SHA3_384:
983                         ret = verify_io_u_sha3_384(hdr, &vc);
984                         break;
985                 case VERIFY_SHA3_512:
986                         ret = verify_io_u_sha3_512(hdr, &vc);
987                         break;
988                 case VERIFY_XXHASH:
989                         ret = verify_io_u_xxhash(hdr, &vc);
990                         break;
991                 case VERIFY_SHA1:
992                         ret = verify_io_u_sha1(hdr, &vc);
993                         break;
994                 case VERIFY_PATTERN:
995                 case VERIFY_PATTERN_NO_HDR:
996                         ret = verify_io_u_pattern(hdr, &vc);
997                         break;
998                 default:
999                         log_err("Bad verify type %u\n", hdr->verify_type);
1000                         ret = EINVAL;
1001                 }
1002
1003                 if (ret && verify_type != hdr->verify_type)
1004                         log_err("fio: verify type mismatch (%u media, %u given)\n",
1005                                         hdr->verify_type, verify_type);
1006         }
1007
1008 done:
1009         if (ret && td->o.verify_fatal)
1010                 fio_mark_td_terminate(td);
1011
1012         return ret;
1013 }
1014
1015 static void fill_xxhash(struct verify_header *hdr, void *p, unsigned int len)
1016 {
1017         struct vhdr_xxhash *vh = hdr_priv(hdr);
1018         void *state;
1019
1020         state = XXH32_init(1);
1021         XXH32_update(state, p, len);
1022         vh->hash = XXH32_digest(state);
1023 }
1024
1025 static void fill_sha3(struct fio_sha3_ctx *sha3_ctx, void *p, unsigned int len)
1026 {
1027         fio_sha3_update(sha3_ctx, p, len);
1028         fio_sha3_final(sha3_ctx);
1029 }
1030
1031 static void fill_sha3_224(struct verify_header *hdr, void *p, unsigned int len)
1032 {
1033         struct vhdr_sha3_224 *vh = hdr_priv(hdr);
1034         struct fio_sha3_ctx sha3_ctx = {
1035                 .sha = vh->sha,
1036         };
1037
1038         fio_sha3_224_init(&sha3_ctx);
1039         fill_sha3(&sha3_ctx, p, len);
1040 }
1041
1042 static void fill_sha3_256(struct verify_header *hdr, void *p, unsigned int len)
1043 {
1044         struct vhdr_sha3_256 *vh = hdr_priv(hdr);
1045         struct fio_sha3_ctx sha3_ctx = {
1046                 .sha = vh->sha,
1047         };
1048
1049         fio_sha3_256_init(&sha3_ctx);
1050         fill_sha3(&sha3_ctx, p, len);
1051 }
1052
1053 static void fill_sha3_384(struct verify_header *hdr, void *p, unsigned int len)
1054 {
1055         struct vhdr_sha3_384 *vh = hdr_priv(hdr);
1056         struct fio_sha3_ctx sha3_ctx = {
1057                 .sha = vh->sha,
1058         };
1059
1060         fio_sha3_384_init(&sha3_ctx);
1061         fill_sha3(&sha3_ctx, p, len);
1062 }
1063
1064 static void fill_sha3_512(struct verify_header *hdr, void *p, unsigned int len)
1065 {
1066         struct vhdr_sha3_512 *vh = hdr_priv(hdr);
1067         struct fio_sha3_ctx sha3_ctx = {
1068                 .sha = vh->sha,
1069         };
1070
1071         fio_sha3_512_init(&sha3_ctx);
1072         fill_sha3(&sha3_ctx, p, len);
1073 }
1074
1075 static void fill_sha512(struct verify_header *hdr, void *p, unsigned int len)
1076 {
1077         struct vhdr_sha512 *vh = hdr_priv(hdr);
1078         struct fio_sha512_ctx sha512_ctx = {
1079                 .buf = vh->sha512,
1080         };
1081
1082         fio_sha512_init(&sha512_ctx);
1083         fio_sha512_update(&sha512_ctx, p, len);
1084 }
1085
1086 static void fill_sha256(struct verify_header *hdr, void *p, unsigned int len)
1087 {
1088         struct vhdr_sha256 *vh = hdr_priv(hdr);
1089         struct fio_sha256_ctx sha256_ctx = {
1090                 .buf = vh->sha256,
1091         };
1092
1093         fio_sha256_init(&sha256_ctx);
1094         fio_sha256_update(&sha256_ctx, p, len);
1095         fio_sha256_final(&sha256_ctx);
1096 }
1097
1098 static void fill_sha1(struct verify_header *hdr, void *p, unsigned int len)
1099 {
1100         struct vhdr_sha1 *vh = hdr_priv(hdr);
1101         struct fio_sha1_ctx sha1_ctx = {
1102                 .H = vh->sha1,
1103         };
1104
1105         fio_sha1_init(&sha1_ctx);
1106         fio_sha1_update(&sha1_ctx, p, len);
1107         fio_sha1_final(&sha1_ctx);
1108 }
1109
1110 static void fill_crc7(struct verify_header *hdr, void *p, unsigned int len)
1111 {
1112         struct vhdr_crc7 *vh = hdr_priv(hdr);
1113
1114         vh->crc7 = fio_crc7(p, len);
1115 }
1116
1117 static void fill_crc16(struct verify_header *hdr, void *p, unsigned int len)
1118 {
1119         struct vhdr_crc16 *vh = hdr_priv(hdr);
1120
1121         vh->crc16 = fio_crc16(p, len);
1122 }
1123
1124 static void fill_crc32(struct verify_header *hdr, void *p, unsigned int len)
1125 {
1126         struct vhdr_crc32 *vh = hdr_priv(hdr);
1127
1128         vh->crc32 = fio_crc32(p, len);
1129 }
1130
1131 static void fill_crc32c(struct verify_header *hdr, void *p, unsigned int len)
1132 {
1133         struct vhdr_crc32 *vh = hdr_priv(hdr);
1134
1135         vh->crc32 = fio_crc32c(p, len);
1136 }
1137
1138 static void fill_crc64(struct verify_header *hdr, void *p, unsigned int len)
1139 {
1140         struct vhdr_crc64 *vh = hdr_priv(hdr);
1141
1142         vh->crc64 = fio_crc64(p, len);
1143 }
1144
1145 static void fill_md5(struct verify_header *hdr, void *p, unsigned int len)
1146 {
1147         struct vhdr_md5 *vh = hdr_priv(hdr);
1148         struct fio_md5_ctx md5_ctx = {
1149                 .hash = (uint32_t *) vh->md5_digest,
1150         };
1151
1152         fio_md5_init(&md5_ctx);
1153         fio_md5_update(&md5_ctx, p, len);
1154         fio_md5_final(&md5_ctx);
1155 }
1156
1157 static void __fill_hdr(struct thread_data *td, struct io_u *io_u,
1158                        struct verify_header *hdr, unsigned int header_num,
1159                        unsigned int header_len, uint64_t rand_seed)
1160 {
1161         void *p = hdr;
1162
1163         hdr->magic = FIO_HDR_MAGIC;
1164         hdr->verify_type = td->o.verify;
1165         hdr->len = header_len;
1166         hdr->rand_seed = rand_seed;
1167         hdr->offset = io_u->offset + header_num * td->o.verify_interval;
1168         hdr->time_sec = io_u->start_time.tv_sec;
1169         hdr->time_nsec = io_u->start_time.tv_nsec;
1170         hdr->thread = td->thread_number;
1171         hdr->numberio = io_u->numberio;
1172         hdr->crc32 = fio_crc32c(p, offsetof(struct verify_header, crc32));
1173 }
1174
1175
1176 static void fill_hdr(struct thread_data *td, struct io_u *io_u,
1177                      struct verify_header *hdr, unsigned int header_num,
1178                      unsigned int header_len, uint64_t rand_seed)
1179 {
1180         if (td->o.verify != VERIFY_PATTERN_NO_HDR)
1181                 __fill_hdr(td, io_u, hdr, header_num, header_len, rand_seed);
1182 }
1183
1184 static void populate_hdr(struct thread_data *td, struct io_u *io_u,
1185                          struct verify_header *hdr, unsigned int header_num,
1186                          unsigned int header_len)
1187 {
1188         unsigned int data_len;
1189         void *data;
1190         char *p;
1191
1192         p = (char *) hdr;
1193
1194         fill_hdr(td, io_u, hdr, header_num, header_len, io_u->rand_seed);
1195
1196         data_len = header_len - hdr_size(td, hdr);
1197
1198         data = p + hdr_size(td, hdr);
1199         switch (td->o.verify) {
1200         case VERIFY_MD5:
1201                 dprint(FD_VERIFY, "fill md5 io_u %p, len %u\n",
1202                                                 io_u, hdr->len);
1203                 fill_md5(hdr, data, data_len);
1204                 break;
1205         case VERIFY_CRC64:
1206                 dprint(FD_VERIFY, "fill crc64 io_u %p, len %u\n",
1207                                                 io_u, hdr->len);
1208                 fill_crc64(hdr, data, data_len);
1209                 break;
1210         case VERIFY_CRC32C:
1211         case VERIFY_CRC32C_INTEL:
1212                 dprint(FD_VERIFY, "fill crc32c io_u %p, len %u\n",
1213                                                 io_u, hdr->len);
1214                 fill_crc32c(hdr, data, data_len);
1215                 break;
1216         case VERIFY_CRC32:
1217                 dprint(FD_VERIFY, "fill crc32 io_u %p, len %u\n",
1218                                                 io_u, hdr->len);
1219                 fill_crc32(hdr, data, data_len);
1220                 break;
1221         case VERIFY_CRC16:
1222                 dprint(FD_VERIFY, "fill crc16 io_u %p, len %u\n",
1223                                                 io_u, hdr->len);
1224                 fill_crc16(hdr, data, data_len);
1225                 break;
1226         case VERIFY_CRC7:
1227                 dprint(FD_VERIFY, "fill crc7 io_u %p, len %u\n",
1228                                                 io_u, hdr->len);
1229                 fill_crc7(hdr, data, data_len);
1230                 break;
1231         case VERIFY_SHA256:
1232                 dprint(FD_VERIFY, "fill sha256 io_u %p, len %u\n",
1233                                                 io_u, hdr->len);
1234                 fill_sha256(hdr, data, data_len);
1235                 break;
1236         case VERIFY_SHA512:
1237                 dprint(FD_VERIFY, "fill sha512 io_u %p, len %u\n",
1238                                                 io_u, hdr->len);
1239                 fill_sha512(hdr, data, data_len);
1240                 break;
1241         case VERIFY_SHA3_224:
1242                 dprint(FD_VERIFY, "fill sha3-224 io_u %p, len %u\n",
1243                                                 io_u, hdr->len);
1244                 fill_sha3_224(hdr, data, data_len);
1245                 break;
1246         case VERIFY_SHA3_256:
1247                 dprint(FD_VERIFY, "fill sha3-256 io_u %p, len %u\n",
1248                                                 io_u, hdr->len);
1249                 fill_sha3_256(hdr, data, data_len);
1250                 break;
1251         case VERIFY_SHA3_384:
1252                 dprint(FD_VERIFY, "fill sha3-384 io_u %p, len %u\n",
1253                                                 io_u, hdr->len);
1254                 fill_sha3_384(hdr, data, data_len);
1255                 break;
1256         case VERIFY_SHA3_512:
1257                 dprint(FD_VERIFY, "fill sha3-512 io_u %p, len %u\n",
1258                                                 io_u, hdr->len);
1259                 fill_sha3_512(hdr, data, data_len);
1260                 break;
1261         case VERIFY_XXHASH:
1262                 dprint(FD_VERIFY, "fill xxhash io_u %p, len %u\n",
1263                                                 io_u, hdr->len);
1264                 fill_xxhash(hdr, data, data_len);
1265                 break;
1266         case VERIFY_SHA1:
1267                 dprint(FD_VERIFY, "fill sha1 io_u %p, len %u\n",
1268                                                 io_u, hdr->len);
1269                 fill_sha1(hdr, data, data_len);
1270                 break;
1271         case VERIFY_HDR_ONLY:
1272         case VERIFY_PATTERN:
1273         case VERIFY_PATTERN_NO_HDR:
1274                 /* nothing to do here */
1275                 break;
1276         default:
1277                 log_err("fio: bad verify type: %d\n", td->o.verify);
1278                 assert(0);
1279         }
1280
1281         if (td->o.verify_offset && hdr_size(td, hdr))
1282                 memswp(p, p + td->o.verify_offset, hdr_size(td, hdr));
1283 }
1284
1285 /*
1286  * fill body of io_u->buf with random data and add a header with the
1287  * checksum of choice
1288  */
1289 void populate_verify_io_u(struct thread_data *td, struct io_u *io_u)
1290 {
1291         if (td->o.verify == VERIFY_NULL)
1292                 return;
1293
1294         io_u->numberio = td->io_issues[io_u->ddir];
1295
1296         fill_pattern_headers(td, io_u, 0, 0);
1297 }
1298
1299 int get_next_verify(struct thread_data *td, struct io_u *io_u)
1300 {
1301         struct io_piece *ipo = NULL;
1302
1303         /*
1304          * this io_u is from a requeue, we already filled the offsets
1305          */
1306         if (io_u->file)
1307                 return 0;
1308
1309         if (!RB_EMPTY_ROOT(&td->io_hist_tree)) {
1310                 struct fio_rb_node *n = rb_first(&td->io_hist_tree);
1311
1312                 ipo = rb_entry(n, struct io_piece, rb_node);
1313
1314                 /*
1315                  * Ensure that the associated IO has completed
1316                  */
1317                 read_barrier();
1318                 if (ipo->flags & IP_F_IN_FLIGHT)
1319                         goto nothing;
1320
1321                 rb_erase(n, &td->io_hist_tree);
1322                 assert(ipo->flags & IP_F_ONRB);
1323                 ipo->flags &= ~IP_F_ONRB;
1324         } else if (!flist_empty(&td->io_hist_list)) {
1325                 ipo = flist_first_entry(&td->io_hist_list, struct io_piece, list);
1326
1327                 /*
1328                  * Ensure that the associated IO has completed
1329                  */
1330                 read_barrier();
1331                 if (ipo->flags & IP_F_IN_FLIGHT)
1332                         goto nothing;
1333
1334                 flist_del(&ipo->list);
1335                 assert(ipo->flags & IP_F_ONLIST);
1336                 ipo->flags &= ~IP_F_ONLIST;
1337         }
1338
1339         if (ipo) {
1340                 td->io_hist_len--;
1341
1342                 io_u->offset = ipo->offset;
1343                 io_u->buflen = ipo->len;
1344                 io_u->numberio = ipo->numberio;
1345                 io_u->file = ipo->file;
1346                 io_u_set(td, io_u, IO_U_F_VER_LIST);
1347
1348                 if (ipo->flags & IP_F_TRIMMED)
1349                         io_u_set(td, io_u, IO_U_F_TRIMMED);
1350
1351                 if (!fio_file_open(io_u->file)) {
1352                         int r = td_io_open_file(td, io_u->file);
1353
1354                         if (r) {
1355                                 dprint(FD_VERIFY, "failed file %s open\n",
1356                                                 io_u->file->file_name);
1357                                 return 1;
1358                         }
1359                 }
1360
1361                 get_file(ipo->file);
1362                 assert(fio_file_open(io_u->file));
1363                 io_u->ddir = DDIR_READ;
1364                 io_u->xfer_buf = io_u->buf;
1365                 io_u->xfer_buflen = io_u->buflen;
1366
1367                 remove_trim_entry(td, ipo);
1368                 free(ipo);
1369                 dprint(FD_VERIFY, "get_next_verify: ret io_u %p\n", io_u);
1370
1371                 if (!td->o.verify_pattern_bytes) {
1372                         io_u->rand_seed = __rand(&td->verify_state);
1373                         if (sizeof(int) != sizeof(long *))
1374                                 io_u->rand_seed *= __rand(&td->verify_state);
1375                 }
1376                 return 0;
1377         }
1378
1379 nothing:
1380         dprint(FD_VERIFY, "get_next_verify: empty\n");
1381         return 1;
1382 }
1383
1384 void fio_verify_init(struct thread_data *td)
1385 {
1386         if (td->o.verify == VERIFY_CRC32C_INTEL ||
1387             td->o.verify == VERIFY_CRC32C) {
1388                 crc32c_arm64_probe();
1389                 crc32c_intel_probe();
1390         }
1391 }
1392
1393 static void *verify_async_thread(void *data)
1394 {
1395         struct thread_data *td = data;
1396         struct io_u *io_u;
1397         int ret = 0;
1398
1399         if (fio_option_is_set(&td->o, verify_cpumask) &&
1400             fio_setaffinity(td->pid, td->o.verify_cpumask)) {
1401                 log_err("fio: failed setting verify thread affinity\n");
1402                 goto done;
1403         }
1404
1405         do {
1406                 FLIST_HEAD(list);
1407
1408                 read_barrier();
1409                 if (td->verify_thread_exit)
1410                         break;
1411
1412                 pthread_mutex_lock(&td->io_u_lock);
1413
1414                 while (flist_empty(&td->verify_list) &&
1415                        !td->verify_thread_exit) {
1416                         ret = pthread_cond_wait(&td->verify_cond,
1417                                                         &td->io_u_lock);
1418                         if (ret) {
1419                                 pthread_mutex_unlock(&td->io_u_lock);
1420                                 break;
1421                         }
1422                 }
1423
1424                 flist_splice_init(&td->verify_list, &list);
1425                 pthread_mutex_unlock(&td->io_u_lock);
1426
1427                 if (flist_empty(&list))
1428                         continue;
1429
1430                 while (!flist_empty(&list)) {
1431                         io_u = flist_first_entry(&list, struct io_u, verify_list);
1432                         flist_del_init(&io_u->verify_list);
1433
1434                         io_u_set(td, io_u, IO_U_F_NO_FILE_PUT);
1435                         ret = verify_io_u(td, &io_u);
1436
1437                         put_io_u(td, io_u);
1438                         if (!ret)
1439                                 continue;
1440                         if (td_non_fatal_error(td, ERROR_TYPE_VERIFY_BIT, ret)) {
1441                                 update_error_count(td, ret);
1442                                 td_clear_error(td);
1443                                 ret = 0;
1444                         }
1445                 }
1446         } while (!ret);
1447
1448         if (ret) {
1449                 td_verror(td, ret, "async_verify");
1450                 if (td->o.verify_fatal)
1451                         fio_mark_td_terminate(td);
1452         }
1453
1454 done:
1455         pthread_mutex_lock(&td->io_u_lock);
1456         td->nr_verify_threads--;
1457         pthread_cond_signal(&td->free_cond);
1458         pthread_mutex_unlock(&td->io_u_lock);
1459
1460         return NULL;
1461 }
1462
1463 int verify_async_init(struct thread_data *td)
1464 {
1465         int i, ret;
1466         pthread_attr_t attr;
1467
1468         pthread_attr_init(&attr);
1469         pthread_attr_setstacksize(&attr, 2 * PTHREAD_STACK_MIN);
1470
1471         td->verify_thread_exit = 0;
1472
1473         td->verify_threads = malloc(sizeof(pthread_t) * td->o.verify_async);
1474         for (i = 0; i < td->o.verify_async; i++) {
1475                 ret = pthread_create(&td->verify_threads[i], &attr,
1476                                         verify_async_thread, td);
1477                 if (ret) {
1478                         log_err("fio: async verify creation failed: %s\n",
1479                                         strerror(ret));
1480                         break;
1481                 }
1482                 ret = pthread_detach(td->verify_threads[i]);
1483                 if (ret) {
1484                         log_err("fio: async verify thread detach failed: %s\n",
1485                                         strerror(ret));
1486                         break;
1487                 }
1488                 td->nr_verify_threads++;
1489         }
1490
1491         pthread_attr_destroy(&attr);
1492
1493         if (i != td->o.verify_async) {
1494                 log_err("fio: only %d verify threads started, exiting\n", i);
1495
1496                 pthread_mutex_lock(&td->io_u_lock);
1497                 td->verify_thread_exit = 1;
1498                 pthread_cond_broadcast(&td->verify_cond);
1499                 pthread_mutex_unlock(&td->io_u_lock);
1500
1501                 return 1;
1502         }
1503
1504         return 0;
1505 }
1506
1507 void verify_async_exit(struct thread_data *td)
1508 {
1509         pthread_mutex_lock(&td->io_u_lock);
1510         td->verify_thread_exit = 1;
1511         pthread_cond_broadcast(&td->verify_cond);
1512
1513         while (td->nr_verify_threads)
1514                 pthread_cond_wait(&td->free_cond, &td->io_u_lock);
1515
1516         pthread_mutex_unlock(&td->io_u_lock);
1517         free(td->verify_threads);
1518         td->verify_threads = NULL;
1519 }
1520
1521 int paste_blockoff(char *buf, unsigned int len, void *priv)
1522 {
1523         struct io_u *io = priv;
1524         unsigned long long off;
1525
1526         typecheck(typeof(off), io->offset);
1527         off = cpu_to_le64((uint64_t)io->offset);
1528         len = min(len, (unsigned int)sizeof(off));
1529         memcpy(buf, &off, len);
1530         return 0;
1531 }
1532
1533 static int __fill_file_completions(struct thread_data *td,
1534                                    struct thread_io_list *s,
1535                                    struct fio_file *f, unsigned int *index)
1536 {
1537         unsigned int comps;
1538         int i, j;
1539
1540         if (!f->last_write_comp)
1541                 return 0;
1542
1543         if (td->io_blocks[DDIR_WRITE] < td->o.iodepth)
1544                 comps = td->io_blocks[DDIR_WRITE];
1545         else
1546                 comps = td->o.iodepth;
1547
1548         j = f->last_write_idx - 1;
1549         for (i = 0; i < comps; i++) {
1550                 if (j == -1)
1551                         j = td->o.iodepth - 1;
1552                 s->comps[*index].fileno = __cpu_to_le64(f->fileno);
1553                 s->comps[*index].offset = cpu_to_le64(f->last_write_comp[j]);
1554                 (*index)++;
1555                 j--;
1556         }
1557
1558         return comps;
1559 }
1560
1561 static int fill_file_completions(struct thread_data *td,
1562                                  struct thread_io_list *s, unsigned int *index)
1563 {
1564         struct fio_file *f;
1565         unsigned int i;
1566         int comps = 0;
1567
1568         for_each_file(td, f, i)
1569                 comps += __fill_file_completions(td, s, f, index);
1570
1571         return comps;
1572 }
1573
1574 struct all_io_list *get_all_io_list(int save_mask, size_t *sz)
1575 {
1576         struct all_io_list *rep;
1577         struct thread_data *td;
1578         size_t depth;
1579         void *next;
1580         int i, nr;
1581
1582         compiletime_assert(sizeof(struct all_io_list) == 8, "all_io_list");
1583
1584         /*
1585          * Calculate reply space needed. We need one 'io_state' per thread,
1586          * and the size will vary depending on depth.
1587          */
1588         depth = 0;
1589         nr = 0;
1590         for_each_td(td, i) {
1591                 if (save_mask != IO_LIST_ALL && (i + 1) != save_mask)
1592                         continue;
1593                 td->stop_io = 1;
1594                 td->flags |= TD_F_VSTATE_SAVED;
1595                 depth += (td->o.iodepth * td->o.nr_files);
1596                 nr++;
1597         }
1598
1599         if (!nr)
1600                 return NULL;
1601
1602         *sz = sizeof(*rep);
1603         *sz += nr * sizeof(struct thread_io_list);
1604         *sz += depth * sizeof(struct file_comp);
1605         rep = malloc(*sz);
1606         memset(rep, 0, *sz);
1607
1608         rep->threads = cpu_to_le64((uint64_t) nr);
1609
1610         next = &rep->state[0];
1611         for_each_td(td, i) {
1612                 struct thread_io_list *s = next;
1613                 unsigned int comps, index = 0;
1614
1615                 if (save_mask != IO_LIST_ALL && (i + 1) != save_mask)
1616                         continue;
1617
1618                 comps = fill_file_completions(td, s, &index);
1619
1620                 s->no_comps = cpu_to_le64((uint64_t) comps);
1621                 s->depth = cpu_to_le64((uint64_t) td->o.iodepth);
1622                 s->nofiles = cpu_to_le64((uint64_t) td->o.nr_files);
1623                 s->numberio = cpu_to_le64((uint64_t) td->io_issues[DDIR_WRITE]);
1624                 s->index = cpu_to_le64((uint64_t) i);
1625                 if (td->random_state.use64) {
1626                         s->rand.state64.s[0] = cpu_to_le64(td->random_state.state64.s1);
1627                         s->rand.state64.s[1] = cpu_to_le64(td->random_state.state64.s2);
1628                         s->rand.state64.s[2] = cpu_to_le64(td->random_state.state64.s3);
1629                         s->rand.state64.s[3] = cpu_to_le64(td->random_state.state64.s4);
1630                         s->rand.state64.s[4] = cpu_to_le64(td->random_state.state64.s5);
1631                         s->rand.state64.s[5] = 0;
1632                         s->rand.use64 = cpu_to_le64((uint64_t)1);
1633                 } else {
1634                         s->rand.state32.s[0] = cpu_to_le32(td->random_state.state32.s1);
1635                         s->rand.state32.s[1] = cpu_to_le32(td->random_state.state32.s2);
1636                         s->rand.state32.s[2] = cpu_to_le32(td->random_state.state32.s3);
1637                         s->rand.state32.s[3] = 0;
1638                         s->rand.use64 = 0;
1639                 }
1640                 s->name[sizeof(s->name) - 1] = '\0';
1641                 strncpy((char *) s->name, td->o.name, sizeof(s->name) - 1);
1642                 next = io_list_next(s);
1643         }
1644
1645         return rep;
1646 }
1647
1648 static int open_state_file(const char *name, const char *prefix, int num,
1649                            int for_write)
1650 {
1651         char out[PATH_MAX];
1652         int flags;
1653         int fd;
1654
1655         if (for_write)
1656                 flags = O_CREAT | O_TRUNC | O_WRONLY | O_SYNC;
1657         else
1658                 flags = O_RDONLY;
1659
1660         verify_state_gen_name(out, sizeof(out), name, prefix, num);
1661
1662         fd = open(out, flags, 0644);
1663         if (fd == -1) {
1664                 perror("fio: open state file");
1665                 log_err("fio: state file: %s (for_write=%d)\n", out, for_write);
1666                 return -1;
1667         }
1668
1669         return fd;
1670 }
1671
1672 static int write_thread_list_state(struct thread_io_list *s,
1673                                    const char *prefix)
1674 {
1675         struct verify_state_hdr hdr;
1676         uint64_t crc;
1677         ssize_t ret;
1678         int fd;
1679
1680         fd = open_state_file((const char *) s->name, prefix, s->index, 1);
1681         if (fd == -1)
1682                 return 1;
1683
1684         crc = fio_crc32c((void *)s, thread_io_list_sz(s));
1685
1686         hdr.version = cpu_to_le64((uint64_t) VSTATE_HDR_VERSION);
1687         hdr.size = cpu_to_le64((uint64_t) thread_io_list_sz(s));
1688         hdr.crc = cpu_to_le64(crc);
1689         ret = write(fd, &hdr, sizeof(hdr));
1690         if (ret != sizeof(hdr))
1691                 goto write_fail;
1692
1693         ret = write(fd, s, thread_io_list_sz(s));
1694         if (ret != thread_io_list_sz(s)) {
1695 write_fail:
1696                 if (ret < 0)
1697                         perror("fio: write state file");
1698                 log_err("fio: failed to write state file\n");
1699                 ret = 1;
1700         } else
1701                 ret = 0;
1702
1703         close(fd);
1704         return ret;
1705 }
1706
1707 void __verify_save_state(struct all_io_list *state, const char *prefix)
1708 {
1709         struct thread_io_list *s = &state->state[0];
1710         unsigned int i;
1711
1712         for (i = 0; i < le64_to_cpu(state->threads); i++) {
1713                 write_thread_list_state(s,  prefix);
1714                 s = io_list_next(s);
1715         }
1716 }
1717
1718 void verify_save_state(int mask)
1719 {
1720         struct all_io_list *state;
1721         size_t sz;
1722
1723         state = get_all_io_list(mask, &sz);
1724         if (state) {
1725                 char prefix[PATH_MAX];
1726
1727                 if (aux_path)
1728                         sprintf(prefix, "%s%clocal", aux_path, FIO_OS_PATH_SEPARATOR);
1729                 else
1730                         strcpy(prefix, "local");
1731
1732                 __verify_save_state(state, prefix);
1733                 free(state);
1734         }
1735 }
1736
1737 void verify_free_state(struct thread_data *td)
1738 {
1739         if (td->vstate)
1740                 free(td->vstate);
1741 }
1742
1743 void verify_assign_state(struct thread_data *td, void *p)
1744 {
1745         struct thread_io_list *s = p;
1746         int i;
1747
1748         s->no_comps = le64_to_cpu(s->no_comps);
1749         s->depth = le32_to_cpu(s->depth);
1750         s->nofiles = le32_to_cpu(s->nofiles);
1751         s->numberio = le64_to_cpu(s->numberio);
1752         s->rand.use64 = le64_to_cpu(s->rand.use64);
1753
1754         if (s->rand.use64) {
1755                 for (i = 0; i < 6; i++)
1756                         s->rand.state64.s[i] = le64_to_cpu(s->rand.state64.s[i]);
1757         } else {
1758                 for (i = 0; i < 4; i++)
1759                         s->rand.state32.s[i] = le32_to_cpu(s->rand.state32.s[i]);
1760         }
1761
1762         for (i = 0; i < s->no_comps; i++) {
1763                 s->comps[i].fileno = le64_to_cpu(s->comps[i].fileno);
1764                 s->comps[i].offset = le64_to_cpu(s->comps[i].offset);
1765         }
1766
1767         td->vstate = p;
1768 }
1769
1770 int verify_state_hdr(struct verify_state_hdr *hdr, struct thread_io_list *s)
1771 {
1772         uint64_t crc;
1773
1774         hdr->version = le64_to_cpu(hdr->version);
1775         hdr->size = le64_to_cpu(hdr->size);
1776         hdr->crc = le64_to_cpu(hdr->crc);
1777
1778         if (hdr->version != VSTATE_HDR_VERSION)
1779                 return 1;
1780
1781         crc = fio_crc32c((void *)s, hdr->size);
1782         if (crc != hdr->crc)
1783                 return 1;
1784
1785         return 0;
1786 }
1787
1788 int verify_load_state(struct thread_data *td, const char *prefix)
1789 {
1790         struct verify_state_hdr hdr;
1791         void *s = NULL;
1792         uint64_t crc;
1793         ssize_t ret;
1794         int fd;
1795
1796         if (!td->o.verify_state)
1797                 return 0;
1798
1799         fd = open_state_file(td->o.name, prefix, td->thread_number - 1, 0);
1800         if (fd == -1)
1801                 return 1;
1802
1803         ret = read(fd, &hdr, sizeof(hdr));
1804         if (ret != sizeof(hdr)) {
1805                 if (ret < 0)
1806                         td_verror(td, errno, "read verify state hdr");
1807                 log_err("fio: failed reading verify state header\n");
1808                 goto err;
1809         }
1810
1811         hdr.version = le64_to_cpu(hdr.version);
1812         hdr.size = le64_to_cpu(hdr.size);
1813         hdr.crc = le64_to_cpu(hdr.crc);
1814
1815         if (hdr.version != VSTATE_HDR_VERSION) {
1816                 log_err("fio: unsupported (%d) version in verify state header\n",
1817                                 (unsigned int) hdr.version);
1818                 goto err;
1819         }
1820
1821         s = malloc(hdr.size);
1822         ret = read(fd, s, hdr.size);
1823         if (ret != hdr.size) {
1824                 if (ret < 0)
1825                         td_verror(td, errno, "read verify state");
1826                 log_err("fio: failed reading verity state\n");
1827                 goto err;
1828         }
1829
1830         crc = fio_crc32c(s, hdr.size);
1831         if (crc != hdr.crc) {
1832                 log_err("fio: verify state is corrupt\n");
1833                 goto err;
1834         }
1835
1836         close(fd);
1837
1838         verify_assign_state(td, s);
1839         return 0;
1840 err:
1841         if (s)
1842                 free(s);
1843         close(fd);
1844         return 1;
1845 }
1846
1847 /*
1848  * Use the loaded verify state to know when to stop doing verification
1849  */
1850 int verify_state_should_stop(struct thread_data *td, struct io_u *io_u)
1851 {
1852         struct thread_io_list *s = td->vstate;
1853         struct fio_file *f = io_u->file;
1854         int i;
1855
1856         if (!s || !f)
1857                 return 0;
1858
1859         /*
1860          * If we're not into the window of issues - depth yet, continue. If
1861          * issue is shorter than depth, do check.
1862          */
1863         if ((td->io_blocks[DDIR_READ] < s->depth ||
1864             s->numberio - td->io_blocks[DDIR_READ] > s->depth) &&
1865             s->numberio > s->depth)
1866                 return 0;
1867
1868         /*
1869          * We're in the window of having to check if this io was
1870          * completed or not. If the IO was seen as completed, then
1871          * lets verify it.
1872          */
1873         for (i = 0; i < s->no_comps; i++) {
1874                 if (s->comps[i].fileno != f->fileno)
1875                         continue;
1876                 if (io_u->offset == s->comps[i].offset)
1877                         return 0;
1878         }
1879
1880         /*
1881          * Not found, we have to stop
1882          */
1883         return 1;
1884 }