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