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         uint32_t len;
 342         struct thread_data *td = vc->td;
 343
 344         offset = vc->io_u->verify_offset;
 345         if (td->o.verify != VERIFY_PATTERN_NO_HDR) {
 346                 len = hdr->len;
 347                 offset += (unsigned long long) vc->hdr_num * len;
 348         } else {
 349                 len = vc->io_u->buflen;
 350         }
 351
 352         log_err("%.8s: verify failed at file %s offset %llu, length %u"
 353                         " (requested block: offset=%llu, length=%llu, flags=%x)\n",
 354                         vc->name, vc->io_u->file->file_name, offset, len,
 355                         vc->io_u->verify_offset, vc->io_u->buflen, vc->io_u->flags);
 356
 357         if (vc->good_crc && vc->bad_crc) {
 358                 log_err("       Expected CRC: ");
 359                 hexdump(vc->good_crc, vc->crc_len);
 360                 log_err("       Received CRC: ");
 361                 hexdump(vc->bad_crc, vc->crc_len);
 362         }
 363
 364         dump_verify_buffers(hdr, vc);
 365 }
 366
 367 /*
 368  * Return data area 'header_num'
 369  */
 370 static inline void *io_u_verify_off(struct verify_header *hdr, struct vcont *vc)
 371 {
 372         return vc->io_u->buf + vc->hdr_num * hdr->len + hdr_size(vc->td, hdr);
 373 }
 374
 375 static int verify_io_u_pattern(struct verify_header *hdr, struct vcont *vc)
 376 {
 377         struct thread_data *td = vc->td;
 378         struct io_u *io_u = vc->io_u;
 379         char *buf, *pattern;
 380         unsigned int header_size = __hdr_size(td->o.verify);
 381         unsigned int len, mod, i, pattern_size;
 382         int rc;
 383
 384         pattern = td->o.verify_pattern;
 385         pattern_size = td->o.verify_pattern_bytes;
 386         assert(pattern_size != 0);
 387
 388         (void)paste_format_inplace(pattern, pattern_size,
 389                                    td->o.verify_fmt, td->o.verify_fmt_sz, io_u);
 390
 391         buf = (char *) hdr + header_size;
 392         len = get_hdr_inc(td, io_u) - header_size;
 393         mod = (get_hdr_inc(td, io_u) * vc->hdr_num + header_size) % pattern_size;
 394
 395         rc = cmp_pattern(pattern, pattern_size, mod, buf, len);
 396         if (!rc)
 397                 return 0;
 398
 399         /* Slow path, compare each byte */
 400         for (i = 0; i < len; i++) {
 401                 if (buf[i] != pattern[mod]) {
 402                         unsigned int bits;
 403
 404                         bits = hweight8(buf[i] ^ pattern[mod]);
 405                         log_err("fio: got pattern '%02x', wanted '%02x'. Bad bits %d\n",
 406                                 (unsigned char)buf[i],
 407                                 (unsigned char)pattern[mod],
 408                                 bits);
 409                         log_err("fio: bad pattern block offset %u\n",
 410                                 i + header_size);
 411                         vc->name = "pattern";
 412                         log_verify_failure(hdr, vc);
 413                         return EILSEQ;
 414                 }
 415                 mod++;
 416                 if (mod == td->o.verify_pattern_bytes)
 417                         mod = 0;
 418         }
 419
 420         /* Unreachable line */
 421         assert(0);
 422         return EILSEQ;
 423 }
 424
 425 static int verify_io_u_xxhash(struct verify_header *hdr, struct vcont *vc)
 426 {
 427         void *p = io_u_verify_off(hdr, vc);
 428         struct vhdr_xxhash *vh = hdr_priv(hdr);
 429         uint32_t hash;
 430         void *state;
 431
 432         dprint(FD_VERIFY, "xxhash verify io_u %p, len %u\n", vc->io_u, hdr->len);
 433
 434         state = XXH32_init(1);
 435         XXH32_update(state, p, hdr->len - hdr_size(vc->td, hdr));
 436         hash = XXH32_digest(state);
 437
 438         if (vh->hash == hash)
 439                 return 0;
 440
 441         vc->name = "xxhash";
 442         vc->good_crc = &vh->hash;
 443         vc->bad_crc = &hash;
 444         vc->crc_len = sizeof(hash);
 445         log_verify_failure(hdr, vc);
 446         return EILSEQ;
 447 }
 448
 449 static int verify_io_u_sha3(struct verify_header *hdr, struct vcont *vc,
 450                             struct fio_sha3_ctx *sha3_ctx, uint8_t *sha,
 451                             unsigned int sha_size, const char *name)
 452 {
 453         void *p = io_u_verify_off(hdr, vc);
 454
 455         dprint(FD_VERIFY, "%s verify io_u %p, len %u\n", name, vc->io_u, hdr->len);
 456
 457         fio_sha3_update(sha3_ctx, p, hdr->len - hdr_size(vc->td, hdr));
 458         fio_sha3_final(sha3_ctx);
 459
 460         if (!memcmp(sha, sha3_ctx->sha, sha_size))
 461                 return 0;
 462
 463         vc->name = name;
 464         vc->good_crc = sha;
 465         vc->bad_crc = sha3_ctx->sha;
 466         vc->crc_len = sha_size;
 467         log_verify_failure(hdr, vc);
 468         return EILSEQ;
 469 }
 470
 471 static int verify_io_u_sha3_224(struct verify_header *hdr, struct vcont *vc)
 472 {
 473         struct vhdr_sha3_224 *vh = hdr_priv(hdr);
 474         uint8_t sha[SHA3_224_DIGEST_SIZE];
 475         struct fio_sha3_ctx sha3_ctx = {
 476                 .sha = sha,
 477         };
 478
 479         fio_sha3_224_init(&sha3_ctx);
 480
 481         return verify_io_u_sha3(hdr, vc, &sha3_ctx, vh->sha,
 482                                 SHA3_224_DIGEST_SIZE, "sha3-224");
 483 }
 484
 485 static int verify_io_u_sha3_256(struct verify_header *hdr, struct vcont *vc)
 486 {
 487         struct vhdr_sha3_256 *vh = hdr_priv(hdr);
 488         uint8_t sha[SHA3_256_DIGEST_SIZE];
 489         struct fio_sha3_ctx sha3_ctx = {
 490                 .sha = sha,
 491         };
 492
 493         fio_sha3_256_init(&sha3_ctx);
 494
 495         return verify_io_u_sha3(hdr, vc, &sha3_ctx, vh->sha,
 496                                 SHA3_256_DIGEST_SIZE, "sha3-256");
 497 }
 498
 499 static int verify_io_u_sha3_384(struct verify_header *hdr, struct vcont *vc)
 500 {
 501         struct vhdr_sha3_384 *vh = hdr_priv(hdr);
 502         uint8_t sha[SHA3_384_DIGEST_SIZE];
 503         struct fio_sha3_ctx sha3_ctx = {
 504                 .sha = sha,
 505         };
 506
 507         fio_sha3_384_init(&sha3_ctx);
 508
 509         return verify_io_u_sha3(hdr, vc, &sha3_ctx, vh->sha,
 510                                 SHA3_384_DIGEST_SIZE, "sha3-384");
 511 }
 512
 513 static int verify_io_u_sha3_512(struct verify_header *hdr, struct vcont *vc)
 514 {
 515         struct vhdr_sha3_512 *vh = hdr_priv(hdr);
 516         uint8_t sha[SHA3_512_DIGEST_SIZE];
 517         struct fio_sha3_ctx sha3_ctx = {
 518                 .sha = sha,
 519         };
 520
 521         fio_sha3_512_init(&sha3_ctx);
 522
 523         return verify_io_u_sha3(hdr, vc, &sha3_ctx, vh->sha,
 524                                 SHA3_512_DIGEST_SIZE, "sha3-512");
 525 }
 526
 527 static int verify_io_u_sha512(struct verify_header *hdr, struct vcont *vc)
 528 {
 529         void *p = io_u_verify_off(hdr, vc);
 530         struct vhdr_sha512 *vh = hdr_priv(hdr);
 531         uint8_t sha512[128];
 532         struct fio_sha512_ctx sha512_ctx = {
 533                 .buf = sha512,
 534         };
 535
 536         dprint(FD_VERIFY, "sha512 verify io_u %p, len %u\n", vc->io_u, hdr->len);
 537
 538         fio_sha512_init(&sha512_ctx);
 539         fio_sha512_update(&sha512_ctx, p, hdr->len - hdr_size(vc->td, hdr));
 540
 541         if (!memcmp(vh->sha512, sha512_ctx.buf, sizeof(sha512)))
 542                 return 0;
 543
 544         vc->name = "sha512";
 545         vc->good_crc = vh->sha512;
 546         vc->bad_crc = sha512_ctx.buf;
 547         vc->crc_len = sizeof(vh->sha512);
 548         log_verify_failure(hdr, vc);
 549         return EILSEQ;
 550 }
 551
 552 static int verify_io_u_sha256(struct verify_header *hdr, struct vcont *vc)
 553 {
 554         void *p = io_u_verify_off(hdr, vc);
 555         struct vhdr_sha256 *vh = hdr_priv(hdr);
 556         uint8_t sha256[64];
 557         struct fio_sha256_ctx sha256_ctx = {
 558                 .buf = sha256,
 559         };
 560
 561         dprint(FD_VERIFY, "sha256 verify io_u %p, len %u\n", vc->io_u, hdr->len);
 562
 563         fio_sha256_init(&sha256_ctx);
 564         fio_sha256_update(&sha256_ctx, p, hdr->len - hdr_size(vc->td, hdr));
 565         fio_sha256_final(&sha256_ctx);
 566
 567         if (!memcmp(vh->sha256, sha256_ctx.buf, sizeof(sha256)))
 568                 return 0;
 569
 570         vc->name = "sha256";
 571         vc->good_crc = vh->sha256;
 572         vc->bad_crc = sha256_ctx.buf;
 573         vc->crc_len = sizeof(vh->sha256);
 574         log_verify_failure(hdr, vc);
 575         return EILSEQ;
 576 }
 577
 578 static int verify_io_u_sha1(struct verify_header *hdr, struct vcont *vc)
 579 {
 580         void *p = io_u_verify_off(hdr, vc);
 581         struct vhdr_sha1 *vh = hdr_priv(hdr);
 582         uint32_t sha1[5];
 583         struct fio_sha1_ctx sha1_ctx = {
 584                 .H = sha1,
 585         };
 586
 587         dprint(FD_VERIFY, "sha1 verify io_u %p, len %u\n", vc->io_u, hdr->len);
 588
 589         fio_sha1_init(&sha1_ctx);
 590         fio_sha1_update(&sha1_ctx, p, hdr->len - hdr_size(vc->td, hdr));
 591         fio_sha1_final(&sha1_ctx);
 592
 593         if (!memcmp(vh->sha1, sha1_ctx.H, sizeof(sha1)))
 594                 return 0;
 595
 596         vc->name = "sha1";
 597         vc->good_crc = vh->sha1;
 598         vc->bad_crc = sha1_ctx.H;
 599         vc->crc_len = sizeof(vh->sha1);
 600         log_verify_failure(hdr, vc);
 601         return EILSEQ;
 602 }
 603
 604 static int verify_io_u_crc7(struct verify_header *hdr, struct vcont *vc)
 605 {
 606         void *p = io_u_verify_off(hdr, vc);
 607         struct vhdr_crc7 *vh = hdr_priv(hdr);
 608         unsigned char c;
 609
 610         dprint(FD_VERIFY, "crc7 verify io_u %p, len %u\n", vc->io_u, hdr->len);
 611
 612         c = fio_crc7(p, hdr->len - hdr_size(vc->td, hdr));
 613
 614         if (c == vh->crc7)
 615                 return 0;
 616
 617         vc->name = "crc7";
 618         vc->good_crc = &vh->crc7;
 619         vc->bad_crc = &c;
 620         vc->crc_len = 1;
 621         log_verify_failure(hdr, vc);
 622         return EILSEQ;
 623 }
 624
 625 static int verify_io_u_crc16(struct verify_header *hdr, struct vcont *vc)
 626 {
 627         void *p = io_u_verify_off(hdr, vc);
 628         struct vhdr_crc16 *vh = hdr_priv(hdr);
 629         unsigned short c;
 630
 631         dprint(FD_VERIFY, "crc16 verify io_u %p, len %u\n", vc->io_u, hdr->len);
 632
 633         c = fio_crc16(p, hdr->len - hdr_size(vc->td, hdr));
 634
 635         if (c == vh->crc16)
 636                 return 0;
 637
 638         vc->name = "crc16";
 639         vc->good_crc = &vh->crc16;
 640         vc->bad_crc = &c;
 641         vc->crc_len = 2;
 642         log_verify_failure(hdr, vc);
 643         return EILSEQ;
 644 }
 645
 646 static int verify_io_u_crc64(struct verify_header *hdr, struct vcont *vc)
 647 {
 648         void *p = io_u_verify_off(hdr, vc);
 649         struct vhdr_crc64 *vh = hdr_priv(hdr);
 650         unsigned long long c;
 651
 652         dprint(FD_VERIFY, "crc64 verify io_u %p, len %u\n", vc->io_u, hdr->len);
 653
 654         c = fio_crc64(p, hdr->len - hdr_size(vc->td, hdr));
 655
 656         if (c == vh->crc64)
 657                 return 0;
 658
 659         vc->name = "crc64";
 660         vc->good_crc = &vh->crc64;
 661         vc->bad_crc = &c;
 662         vc->crc_len = 8;
 663         log_verify_failure(hdr, vc);
 664         return EILSEQ;
 665 }
 666
 667 static int verify_io_u_crc32(struct verify_header *hdr, struct vcont *vc)
 668 {
 669         void *p = io_u_verify_off(hdr, vc);
 670         struct vhdr_crc32 *vh = hdr_priv(hdr);
 671         uint32_t c;
 672
 673         dprint(FD_VERIFY, "crc32 verify io_u %p, len %u\n", vc->io_u, hdr->len);
 674
 675         c = fio_crc32(p, hdr->len - hdr_size(vc->td, hdr));
 676
 677         if (c == vh->crc32)
 678                 return 0;
 679
 680         vc->name = "crc32";
 681         vc->good_crc = &vh->crc32;
 682         vc->bad_crc = &c;
 683         vc->crc_len = 4;
 684         log_verify_failure(hdr, vc);
 685         return EILSEQ;
 686 }
 687
 688 static int verify_io_u_crc32c(struct verify_header *hdr, struct vcont *vc)
 689 {
 690         void *p = io_u_verify_off(hdr, vc);
 691         struct vhdr_crc32 *vh = hdr_priv(hdr);
 692         uint32_t c;
 693
 694         dprint(FD_VERIFY, "crc32c verify io_u %p, len %u\n", vc->io_u, hdr->len);
 695
 696         c = fio_crc32c(p, hdr->len - hdr_size(vc->td, hdr));
 697
 698         if (c == vh->crc32)
 699                 return 0;
 700
 701         vc->name = "crc32c";
 702         vc->good_crc = &vh->crc32;
 703         vc->bad_crc = &c;
 704         vc->crc_len = 4;
 705         log_verify_failure(hdr, vc);
 706         return EILSEQ;
 707 }
 708
 709 static int verify_io_u_md5(struct verify_header *hdr, struct vcont *vc)
 710 {
 711         void *p = io_u_verify_off(hdr, vc);
 712         struct vhdr_md5 *vh = hdr_priv(hdr);
 713         uint32_t hash[MD5_HASH_WORDS];
 714         struct fio_md5_ctx md5_ctx = {
 715                 .hash = hash,
 716         };
 717
 718         dprint(FD_VERIFY, "md5 verify io_u %p, len %u\n", vc->io_u, hdr->len);
 719
 720         fio_md5_init(&md5_ctx);
 721         fio_md5_update(&md5_ctx, p, hdr->len - hdr_size(vc->td, hdr));
 722         fio_md5_final(&md5_ctx);
 723
 724         if (!memcmp(vh->md5_digest, md5_ctx.hash, sizeof(hash)))
 725                 return 0;
 726
 727         vc->name = "md5";
 728         vc->good_crc = vh->md5_digest;
 729         vc->bad_crc = md5_ctx.hash;
 730         vc->crc_len = sizeof(hash);
 731         log_verify_failure(hdr, vc);
 732         return EILSEQ;
 733 }
 734
 735 /*
 736  * Push IO verification to a separate thread
 737  */
 738 int verify_io_u_async(struct thread_data *td, struct io_u **io_u_ptr)
 739 {
 740         struct io_u *io_u = *io_u_ptr;
 741
 742         pthread_mutex_lock(&td->io_u_lock);
 743
 744         if (io_u->file)
 745                 put_file_log(td, io_u->file);
 746
 747         if (io_u->flags & IO_U_F_IN_CUR_DEPTH) {
 748                 td->cur_depth--;
 749                 io_u_clear(td, io_u, IO_U_F_IN_CUR_DEPTH);
 750         }
 751         flist_add_tail(&io_u->verify_list, &td->verify_list);
 752         *io_u_ptr = NULL;
 753
 754         pthread_cond_signal(&td->verify_cond);
 755         pthread_mutex_unlock(&td->io_u_lock);
 756         return 0;
 757 }
 758
 759 /*
 760  * Thanks Rusty, for spending the time so I don't have to.
 761  *
 762  * http://rusty.ozlabs.org/?p=560
 763  */
 764 static int mem_is_zero(const void *data, size_t length)
 765 {
 766         const unsigned char *p = data;
 767         size_t len;
 768
 769         /* Check first 16 bytes manually */
 770         for (len = 0; len < 16; len++) {
 771                 if (!length)
 772                         return 1;
 773                 if (*p)
 774                         return 0;
 775                 p++;
 776                 length--;
 777         }
 778
 779         /* Now we know that's zero, memcmp with self. */
 780         return memcmp(data, p, length) == 0;
 781 }
 782
 783 static int mem_is_zero_slow(const void *data, size_t length, size_t *offset)
 784 {
 785         const unsigned char *p = data;
 786
 787         *offset = 0;
 788         while (length) {
 789                 if (*p)
 790                         break;
 791                 (*offset)++;
 792                 length--;
 793                 p++;
 794         }
 795
 796         return !length;
 797 }
 798
 799 static int verify_trimmed_io_u(struct thread_data *td, struct io_u *io_u)
 800 {
 801         size_t offset;
 802
 803         if (!td->o.trim_zero)
 804                 return 0;
 805
 806         if (mem_is_zero(io_u->buf, io_u->buflen))
 807                 return 0;
 808
 809         mem_is_zero_slow(io_u->buf, io_u->buflen, &offset);
 810
 811         log_err("trim: verify failed at file %s offset %llu, length %llu"
 812                 ", block offset %lu\n",
 813                         io_u->file->file_name, io_u->verify_offset, io_u->buflen,
 814                         (unsigned long) offset);
 815         return EILSEQ;
 816 }
 817
 818 static int verify_header(struct io_u *io_u, struct thread_data *td,
 819                          struct verify_header *hdr, unsigned int hdr_num,
 820                          unsigned int hdr_len)
 821 {
 822         void *p = hdr;
 823         uint32_t crc;
 824
 825         if (hdr->magic != FIO_HDR_MAGIC) {
 826                 log_err("verify: bad magic header %x, wanted %x",
 827                         hdr->magic, FIO_HDR_MAGIC);
 828                 goto err;
 829         }
 830         if (hdr->len != hdr_len) {
 831                 log_err("verify: bad header length %u, wanted %u",
 832                         hdr->len, hdr_len);
 833                 goto err;
 834         }
 835         if (hdr->rand_seed != io_u->rand_seed) {
 836                 log_err("verify: bad header rand_seed %"PRIu64
 837                         ", wanted %"PRIu64,
 838                         hdr->rand_seed, io_u->rand_seed);
 839                 goto err;
 840         }
 841         if (hdr->offset != io_u->verify_offset + hdr_num * td->o.verify_interval) {
 842                 log_err("verify: bad header offset %"PRIu64
 843                         ", wanted %llu",
 844                         hdr->offset, io_u->verify_offset);
 845                 goto err;
 846         }
 847
 848         /*
 849          * For read-only workloads, the program cannot be certain of the
 850          * last numberio written to a block. Checking of numberio will be
 851          * done only for workloads that write data.  For verify_only,
 852          * numberio check is skipped.
 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)
 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"
 874                 " (requested block: offset=%llu, length=%llu)\n",
 875                 io_u->file->file_name,
 876                 io_u->verify_offset + hdr_num * hdr_len, hdr_len,
 877                 io_u->verify_offset, io_u->buflen);
 878
 879         if (td->o.verify_dump)
 880                 dump_buf(p, hdr_len, io_u->verify_offset + hdr_num * hdr_len,
 881                                 "hdr_fail", io_u->file);
 882
 883         return EILSEQ;
 884 }
 885
 886 int verify_io_u(struct thread_data *td, struct io_u **io_u_ptr)
 887 {
 888         struct verify_header *hdr;
 889         struct io_u *io_u = *io_u_ptr;
 890         unsigned int header_size, hdr_inc, hdr_num = 0;
 891         void *p;
 892         int ret;
 893
 894         if (td->o.verify == VERIFY_NULL || io_u->ddir != DDIR_READ)
 895                 return 0;
 896         /*
 897          * If the IO engine is faking IO (like null), then just pretend
 898          * we verified everything.
 899          */
 900         if (td_ioengine_flagged(td, FIO_FAKEIO))
 901                 return 0;
 902
 903         if (io_u->flags & IO_U_F_TRIMMED) {
 904                 ret = verify_trimmed_io_u(td, io_u);
 905                 goto done;
 906         }
 907
 908         hdr_inc = get_hdr_inc(td, io_u);
 909
 910         ret = 0;
 911         for (p = io_u->buf; p < io_u->buf + io_u->buflen;
 912              p += hdr_inc, hdr_num++) {
 913                 struct vcont vc = {
 914                         .io_u           = io_u,
 915                         .hdr_num        = hdr_num,
 916                         .td             = td,
 917                 };
 918                 unsigned int verify_type;
 919
 920                 if (ret && td->o.verify_fatal)
 921                         break;
 922
 923                 header_size = __hdr_size(td->o.verify);
 924                 if (td->o.verify_offset)
 925                         memswp(p, p + td->o.verify_offset, header_size);
 926                 hdr = p;
 927
 928                 /*
 929                  * Make rand_seed check pass when have verify_backlog or
 930                  * zone reset frequency for zonemode=zbd.
 931                  */
 932                 if (!td_rw(td) || (td->flags & TD_F_VER_BACKLOG) ||
 933                     td->o.zrf.u.f)
 934                         io_u->rand_seed = hdr->rand_seed;
 935
 936                 if (td->o.verify != VERIFY_PATTERN_NO_HDR) {
 937                         ret = verify_header(io_u, td, hdr, hdr_num, hdr_inc);
 938                         if (ret)
 939                                 return ret;
 940                 }
 941
 942                 if (td->o.verify != VERIFY_NONE)
 943                         verify_type = td->o.verify;
 944                 else
 945                         verify_type = hdr->verify_type;
 946
 947                 switch (verify_type) {
 948                 case VERIFY_HDR_ONLY:
 949                         /* Header is always verified, check if pattern is left
 950                          * for verification. */
 951                         if (td->o.verify_pattern_bytes)
 952                                 ret = verify_io_u_pattern(hdr, &vc);
 953                         break;
 954                 case VERIFY_MD5:
 955                         ret = verify_io_u_md5(hdr, &vc);
 956                         break;
 957                 case VERIFY_CRC64:
 958                         ret = verify_io_u_crc64(hdr, &vc);
 959                         break;
 960                 case VERIFY_CRC32C:
 961                 case VERIFY_CRC32C_INTEL:
 962                         ret = verify_io_u_crc32c(hdr, &vc);
 963                         break;
 964                 case VERIFY_CRC32:
 965                         ret = verify_io_u_crc32(hdr, &vc);
 966                         break;
 967                 case VERIFY_CRC16:
 968                         ret = verify_io_u_crc16(hdr, &vc);
 969                         break;
 970                 case VERIFY_CRC7:
 971                         ret = verify_io_u_crc7(hdr, &vc);
 972                         break;
 973                 case VERIFY_SHA256:
 974                         ret = verify_io_u_sha256(hdr, &vc);
 975                         break;
 976                 case VERIFY_SHA512:
 977                         ret = verify_io_u_sha512(hdr, &vc);
 978                         break;
 979                 case VERIFY_SHA3_224:
 980                         ret = verify_io_u_sha3_224(hdr, &vc);
 981                         break;
 982                 case VERIFY_SHA3_256:
 983                         ret = verify_io_u_sha3_256(hdr, &vc);
 984                         break;
 985                 case VERIFY_SHA3_384:
 986                         ret = verify_io_u_sha3_384(hdr, &vc);
 987                         break;
 988                 case VERIFY_SHA3_512:
 989                         ret = verify_io_u_sha3_512(hdr, &vc);
 990                         break;
 991                 case VERIFY_XXHASH:
 992                         ret = verify_io_u_xxhash(hdr, &vc);
 993                         break;
 994                 case VERIFY_SHA1:
 995                         ret = verify_io_u_sha1(hdr, &vc);
 996                         break;
 997                 case VERIFY_PATTERN:
 998                 case VERIFY_PATTERN_NO_HDR:
 999                         ret = verify_io_u_pattern(hdr, &vc);
1000                         break;
1001                 default:
1002                         log_err("Bad verify type %u\n", hdr->verify_type);
1003                         ret = EINVAL;
1004                 }
1005
1006                 if (ret && verify_type != hdr->verify_type)
1007                         log_err("fio: verify type mismatch (%u media, %u given)\n",
1008                                         hdr->verify_type, verify_type);
1009         }
1010
1011 done:
1012         if (ret && td->o.verify_fatal)
1013                 fio_mark_td_terminate(td);
1014
1015         return ret;
1016 }
1017
1018 static void fill_xxhash(struct verify_header *hdr, void *p, unsigned int len)
1019 {
1020         struct vhdr_xxhash *vh = hdr_priv(hdr);
1021         void *state;
1022
1023         state = XXH32_init(1);
1024         XXH32_update(state, p, len);
1025         vh->hash = XXH32_digest(state);
1026 }
1027
1028 static void fill_sha3(struct fio_sha3_ctx *sha3_ctx, void *p, unsigned int len)
1029 {
1030         fio_sha3_update(sha3_ctx, p, len);
1031         fio_sha3_final(sha3_ctx);
1032 }
1033
1034 static void fill_sha3_224(struct verify_header *hdr, void *p, unsigned int len)
1035 {
1036         struct vhdr_sha3_224 *vh = hdr_priv(hdr);
1037         struct fio_sha3_ctx sha3_ctx = {
1038                 .sha = vh->sha,
1039         };
1040
1041         fio_sha3_224_init(&sha3_ctx);
1042         fill_sha3(&sha3_ctx, p, len);
1043 }
1044
1045 static void fill_sha3_256(struct verify_header *hdr, void *p, unsigned int len)
1046 {
1047         struct vhdr_sha3_256 *vh = hdr_priv(hdr);
1048         struct fio_sha3_ctx sha3_ctx = {
1049                 .sha = vh->sha,
1050         };
1051
1052         fio_sha3_256_init(&sha3_ctx);
1053         fill_sha3(&sha3_ctx, p, len);
1054 }
1055
1056 static void fill_sha3_384(struct verify_header *hdr, void *p, unsigned int len)
1057 {
1058         struct vhdr_sha3_384 *vh = hdr_priv(hdr);
1059         struct fio_sha3_ctx sha3_ctx = {
1060                 .sha = vh->sha,
1061         };
1062
1063         fio_sha3_384_init(&sha3_ctx);
1064         fill_sha3(&sha3_ctx, p, len);
1065 }
1066
1067 static void fill_sha3_512(struct verify_header *hdr, void *p, unsigned int len)
1068 {
1069         struct vhdr_sha3_512 *vh = hdr_priv(hdr);
1070         struct fio_sha3_ctx sha3_ctx = {
1071                 .sha = vh->sha,
1072         };
1073
1074         fio_sha3_512_init(&sha3_ctx);
1075         fill_sha3(&sha3_ctx, p, len);
1076 }
1077
1078 static void fill_sha512(struct verify_header *hdr, void *p, unsigned int len)
1079 {
1080         struct vhdr_sha512 *vh = hdr_priv(hdr);
1081         struct fio_sha512_ctx sha512_ctx = {
1082                 .buf = vh->sha512,
1083         };
1084
1085         fio_sha512_init(&sha512_ctx);
1086         fio_sha512_update(&sha512_ctx, p, len);
1087 }
1088
1089 static void fill_sha256(struct verify_header *hdr, void *p, unsigned int len)
1090 {
1091         struct vhdr_sha256 *vh = hdr_priv(hdr);
1092         struct fio_sha256_ctx sha256_ctx = {
1093                 .buf = vh->sha256,
1094         };
1095
1096         fio_sha256_init(&sha256_ctx);
1097         fio_sha256_update(&sha256_ctx, p, len);
1098         fio_sha256_final(&sha256_ctx);
1099 }
1100
1101 static void fill_sha1(struct verify_header *hdr, void *p, unsigned int len)
1102 {
1103         struct vhdr_sha1 *vh = hdr_priv(hdr);
1104         struct fio_sha1_ctx sha1_ctx = {
1105                 .H = vh->sha1,
1106         };
1107
1108         fio_sha1_init(&sha1_ctx);
1109         fio_sha1_update(&sha1_ctx, p, len);
1110         fio_sha1_final(&sha1_ctx);
1111 }
1112
1113 static void fill_crc7(struct verify_header *hdr, void *p, unsigned int len)
1114 {
1115         struct vhdr_crc7 *vh = hdr_priv(hdr);
1116
1117         vh->crc7 = fio_crc7(p, len);
1118 }
1119
1120 static void fill_crc16(struct verify_header *hdr, void *p, unsigned int len)
1121 {
1122         struct vhdr_crc16 *vh = hdr_priv(hdr);
1123
1124         vh->crc16 = fio_crc16(p, len);
1125 }
1126
1127 static void fill_crc32(struct verify_header *hdr, void *p, unsigned int len)
1128 {
1129         struct vhdr_crc32 *vh = hdr_priv(hdr);
1130
1131         vh->crc32 = fio_crc32(p, len);
1132 }
1133
1134 static void fill_crc32c(struct verify_header *hdr, void *p, unsigned int len)
1135 {
1136         struct vhdr_crc32 *vh = hdr_priv(hdr);
1137
1138         vh->crc32 = fio_crc32c(p, len);
1139 }
1140
1141 static void fill_crc64(struct verify_header *hdr, void *p, unsigned int len)
1142 {
1143         struct vhdr_crc64 *vh = hdr_priv(hdr);
1144
1145         vh->crc64 = fio_crc64(p, len);
1146 }
1147
1148 static void fill_md5(struct verify_header *hdr, void *p, unsigned int len)
1149 {
1150         struct vhdr_md5 *vh = hdr_priv(hdr);
1151         struct fio_md5_ctx md5_ctx = {
1152                 .hash = (uint32_t *) vh->md5_digest,
1153         };
1154
1155         fio_md5_init(&md5_ctx);
1156         fio_md5_update(&md5_ctx, p, len);
1157         fio_md5_final(&md5_ctx);
1158 }
1159
1160 static void __fill_hdr(struct thread_data *td, struct io_u *io_u,
1161                        struct verify_header *hdr, unsigned int header_num,
1162                        unsigned int header_len, uint64_t rand_seed)
1163 {
1164         void *p = hdr;
1165
1166         hdr->magic = FIO_HDR_MAGIC;
1167         hdr->verify_type = td->o.verify;
1168         hdr->len = header_len;
1169         hdr->rand_seed = rand_seed;
1170         hdr->offset = io_u->verify_offset + header_num * td->o.verify_interval;
1171         hdr->time_sec = io_u->start_time.tv_sec;
1172         hdr->time_nsec = io_u->start_time.tv_nsec;
1173         hdr->thread = td->thread_number;
1174         hdr->numberio = io_u->numberio;
1175         hdr->crc32 = fio_crc32c(p, offsetof(struct verify_header, crc32));
1176 }
1177
1178
1179 static void fill_hdr(struct thread_data *td, struct io_u *io_u,
1180                      struct verify_header *hdr, unsigned int header_num,
1181                      unsigned int header_len, uint64_t rand_seed)
1182 {
1183         if (td->o.verify != VERIFY_PATTERN_NO_HDR)
1184                 __fill_hdr(td, io_u, hdr, header_num, header_len, rand_seed);
1185 }
1186
1187 static void populate_hdr(struct thread_data *td, struct io_u *io_u,
1188                          struct verify_header *hdr, unsigned int header_num,
1189                          unsigned int header_len)
1190 {
1191         unsigned int data_len;
1192         void *data;
1193         char *p;
1194
1195         p = (char *) hdr;
1196
1197         fill_hdr(td, io_u, hdr, header_num, header_len, io_u->rand_seed);
1198
1199         if (header_len <= hdr_size(td, hdr)) {
1200                 td_verror(td, EINVAL, "Blocksize too small");
1201                 return;
1202         }
1203         data_len = header_len - hdr_size(td, hdr);
1204
1205         data = p + hdr_size(td, hdr);
1206         switch (td->o.verify) {
1207         case VERIFY_MD5:
1208                 dprint(FD_VERIFY, "fill md5 io_u %p, len %u\n",
1209                                                 io_u, hdr->len);
1210                 fill_md5(hdr, data, data_len);
1211                 break;
1212         case VERIFY_CRC64:
1213                 dprint(FD_VERIFY, "fill crc64 io_u %p, len %u\n",
1214                                                 io_u, hdr->len);
1215                 fill_crc64(hdr, data, data_len);
1216                 break;
1217         case VERIFY_CRC32C:
1218         case VERIFY_CRC32C_INTEL:
1219                 dprint(FD_VERIFY, "fill crc32c io_u %p, len %u\n",
1220                                                 io_u, hdr->len);
1221                 fill_crc32c(hdr, data, data_len);
1222                 break;
1223         case VERIFY_CRC32:
1224                 dprint(FD_VERIFY, "fill crc32 io_u %p, len %u\n",
1225                                                 io_u, hdr->len);
1226                 fill_crc32(hdr, data, data_len);
1227                 break;
1228         case VERIFY_CRC16:
1229                 dprint(FD_VERIFY, "fill crc16 io_u %p, len %u\n",
1230                                                 io_u, hdr->len);
1231                 fill_crc16(hdr, data, data_len);
1232                 break;
1233         case VERIFY_CRC7:
1234                 dprint(FD_VERIFY, "fill crc7 io_u %p, len %u\n",
1235                                                 io_u, hdr->len);
1236                 fill_crc7(hdr, data, data_len);
1237                 break;
1238         case VERIFY_SHA256:
1239                 dprint(FD_VERIFY, "fill sha256 io_u %p, len %u\n",
1240                                                 io_u, hdr->len);
1241                 fill_sha256(hdr, data, data_len);
1242                 break;
1243         case VERIFY_SHA512:
1244                 dprint(FD_VERIFY, "fill sha512 io_u %p, len %u\n",
1245                                                 io_u, hdr->len);
1246                 fill_sha512(hdr, data, data_len);
1247                 break;
1248         case VERIFY_SHA3_224:
1249                 dprint(FD_VERIFY, "fill sha3-224 io_u %p, len %u\n",
1250                                                 io_u, hdr->len);
1251                 fill_sha3_224(hdr, data, data_len);
1252                 break;
1253         case VERIFY_SHA3_256:
1254                 dprint(FD_VERIFY, "fill sha3-256 io_u %p, len %u\n",
1255                                                 io_u, hdr->len);
1256                 fill_sha3_256(hdr, data, data_len);
1257                 break;
1258         case VERIFY_SHA3_384:
1259                 dprint(FD_VERIFY, "fill sha3-384 io_u %p, len %u\n",
1260                                                 io_u, hdr->len);
1261                 fill_sha3_384(hdr, data, data_len);
1262                 break;
1263         case VERIFY_SHA3_512:
1264                 dprint(FD_VERIFY, "fill sha3-512 io_u %p, len %u\n",
1265                                                 io_u, hdr->len);
1266                 fill_sha3_512(hdr, data, data_len);
1267                 break;
1268         case VERIFY_XXHASH:
1269                 dprint(FD_VERIFY, "fill xxhash io_u %p, len %u\n",
1270                                                 io_u, hdr->len);
1271                 fill_xxhash(hdr, data, data_len);
1272                 break;
1273         case VERIFY_SHA1:
1274                 dprint(FD_VERIFY, "fill sha1 io_u %p, len %u\n",
1275                                                 io_u, hdr->len);
1276                 fill_sha1(hdr, data, data_len);
1277                 break;
1278         case VERIFY_HDR_ONLY:
1279         case VERIFY_PATTERN:
1280         case VERIFY_PATTERN_NO_HDR:
1281                 /* nothing to do here */
1282                 break;
1283         default:
1284                 log_err("fio: bad verify type: %d\n", td->o.verify);
1285                 assert(0);
1286         }
1287
1288         if (td->o.verify_offset && hdr_size(td, hdr))
1289                 memswp(p, p + td->o.verify_offset, hdr_size(td, hdr));
1290 }
1291
1292 /*
1293  * fill body of io_u->buf with random data and add a header with the
1294  * checksum of choice
1295  */
1296 void populate_verify_io_u(struct thread_data *td, struct io_u *io_u)
1297 {
1298         if (td->o.verify == VERIFY_NULL)
1299                 return;
1300
1301         fill_pattern_headers(td, io_u, 0, 0);
1302 }
1303
1304 int get_next_verify(struct thread_data *td, struct io_u *io_u)
1305 {
1306         struct io_piece *ipo = NULL;
1307
1308         /*
1309          * this io_u is from a requeue, we already filled the offsets
1310          */
1311         if (io_u->file)
1312                 return 0;
1313
1314         if (!RB_EMPTY_ROOT(&td->io_hist_tree)) {
1315                 struct fio_rb_node *n = rb_first(&td->io_hist_tree);
1316
1317                 ipo = rb_entry(n, struct io_piece, rb_node);
1318
1319                 /*
1320                  * Ensure that the associated IO has completed
1321                  */
1322                 if (atomic_load_acquire(&ipo->flags) & IP_F_IN_FLIGHT)
1323                         goto nothing;
1324
1325                 rb_erase(n, &td->io_hist_tree);
1326                 assert(ipo->flags & IP_F_ONRB);
1327                 ipo->flags &= ~IP_F_ONRB;
1328         } else if (!flist_empty(&td->io_hist_list)) {
1329                 ipo = flist_first_entry(&td->io_hist_list, struct io_piece, list);
1330
1331                 /*
1332                  * Ensure that the associated IO has completed
1333                  */
1334                 if (atomic_load_acquire(&ipo->flags) & IP_F_IN_FLIGHT)
1335                         goto nothing;
1336
1337                 flist_del(&ipo->list);
1338                 assert(ipo->flags & IP_F_ONLIST);
1339                 ipo->flags &= ~IP_F_ONLIST;
1340         }
1341
1342         if (ipo) {
1343                 td->io_hist_len--;
1344
1345                 io_u->offset = ipo->offset;
1346                 io_u->verify_offset = ipo->offset;
1347                 io_u->buflen = ipo->len;
1348                 io_u->numberio = ipo->numberio;
1349                 io_u->file = ipo->file;
1350                 io_u_set(td, io_u, IO_U_F_VER_LIST);
1351
1352                 if (ipo->flags & IP_F_TRIMMED)
1353                         io_u_set(td, io_u, IO_U_F_TRIMMED);
1354
1355                 if (!fio_file_open(io_u->file)) {
1356                         int r = td_io_open_file(td, io_u->file);
1357
1358                         if (r) {
1359                                 dprint(FD_VERIFY, "failed file %s open\n",
1360                                                 io_u->file->file_name);
1361                                 return 1;
1362                         }
1363                 }
1364
1365                 get_file(ipo->file);
1366                 assert(fio_file_open(io_u->file));
1367                 io_u->ddir = DDIR_READ;
1368                 io_u->xfer_buf = io_u->buf;
1369                 io_u->xfer_buflen = io_u->buflen;
1370
1371                 remove_trim_entry(td, ipo);
1372                 free(ipo);
1373                 dprint(FD_VERIFY, "get_next_verify: ret io_u %p\n", io_u);
1374
1375                 if (!td->o.verify_pattern_bytes) {
1376                         io_u->rand_seed = __rand(&td->verify_state);
1377                         if (sizeof(int) != sizeof(long *))
1378                                 io_u->rand_seed *= __rand(&td->verify_state);
1379                 }
1380                 return 0;
1381         }
1382
1383 nothing:
1384         dprint(FD_VERIFY, "get_next_verify: empty\n");
1385         return 1;
1386 }
1387
1388 void fio_verify_init(struct thread_data *td)
1389 {
1390         if (td->o.verify == VERIFY_CRC32C_INTEL ||
1391             td->o.verify == VERIFY_CRC32C) {
1392                 crc32c_arm64_probe();
1393                 crc32c_intel_probe();
1394         }
1395 }
1396
1397 static void *verify_async_thread(void *data)
1398 {
1399         struct thread_data *td = data;
1400         struct io_u *io_u;
1401         int ret = 0;
1402
1403         if (fio_option_is_set(&td->o, verify_cpumask) &&
1404             fio_setaffinity(td->pid, td->o.verify_cpumask)) {
1405                 log_err("fio: failed setting verify thread affinity\n");
1406                 goto done;
1407         }
1408
1409         do {
1410                 FLIST_HEAD(list);
1411
1412                 read_barrier();
1413                 if (td->verify_thread_exit)
1414                         break;
1415
1416                 pthread_mutex_lock(&td->io_u_lock);
1417
1418                 while (flist_empty(&td->verify_list) &&
1419                        !td->verify_thread_exit) {
1420                         ret = pthread_cond_wait(&td->verify_cond,
1421                                                         &td->io_u_lock);
1422                         if (ret) {
1423                                 break;
1424                         }
1425                 }
1426
1427                 flist_splice_init(&td->verify_list, &list);
1428                 pthread_mutex_unlock(&td->io_u_lock);
1429
1430                 if (flist_empty(&list))
1431                         continue;
1432
1433                 while (!flist_empty(&list)) {
1434                         io_u = flist_first_entry(&list, struct io_u, verify_list);
1435                         flist_del_init(&io_u->verify_list);
1436
1437                         io_u_set(td, io_u, IO_U_F_NO_FILE_PUT);
1438                         ret = verify_io_u(td, &io_u);
1439
1440                         put_io_u(td, io_u);
1441                         if (!ret)
1442                                 continue;
1443                         if (td_non_fatal_error(td, ERROR_TYPE_VERIFY_BIT, ret)) {
1444                                 update_error_count(td, ret);
1445                                 td_clear_error(td);
1446                                 ret = 0;
1447                         }
1448                 }
1449         } while (!ret);
1450
1451         if (ret) {
1452                 td_verror(td, ret, "async_verify");
1453                 if (td->o.verify_fatal)
1454                         fio_mark_td_terminate(td);
1455         }
1456
1457 done:
1458         pthread_mutex_lock(&td->io_u_lock);
1459         td->nr_verify_threads--;
1460         pthread_cond_signal(&td->free_cond);
1461         pthread_mutex_unlock(&td->io_u_lock);
1462
1463         return NULL;
1464 }
1465
1466 int verify_async_init(struct thread_data *td)
1467 {
1468         int i, ret;
1469         pthread_attr_t attr;
1470
1471         pthread_attr_init(&attr);
1472         pthread_attr_setstacksize(&attr, 2 * PTHREAD_STACK_MIN);
1473
1474         td->verify_thread_exit = 0;
1475
1476         td->verify_threads = malloc(sizeof(pthread_t) * td->o.verify_async);
1477         for (i = 0; i < td->o.verify_async; i++) {
1478                 ret = pthread_create(&td->verify_threads[i], &attr,
1479                                         verify_async_thread, td);
1480                 if (ret) {
1481                         log_err("fio: async verify creation failed: %s\n",
1482                                         strerror(ret));
1483                         break;
1484                 }
1485                 ret = pthread_detach(td->verify_threads[i]);
1486                 if (ret) {
1487                         log_err("fio: async verify thread detach failed: %s\n",
1488                                         strerror(ret));
1489                         break;
1490                 }
1491                 td->nr_verify_threads++;
1492         }
1493
1494         pthread_attr_destroy(&attr);
1495
1496         if (i != td->o.verify_async) {
1497                 log_err("fio: only %d verify threads started, exiting\n", i);
1498
1499                 pthread_mutex_lock(&td->io_u_lock);
1500                 td->verify_thread_exit = 1;
1501                 pthread_cond_broadcast(&td->verify_cond);
1502                 pthread_mutex_unlock(&td->io_u_lock);
1503
1504                 return 1;
1505         }
1506
1507         return 0;
1508 }
1509
1510 void verify_async_exit(struct thread_data *td)
1511 {
1512         pthread_mutex_lock(&td->io_u_lock);
1513         td->verify_thread_exit = 1;
1514         pthread_cond_broadcast(&td->verify_cond);
1515
1516         while (td->nr_verify_threads)
1517                 pthread_cond_wait(&td->free_cond, &td->io_u_lock);
1518
1519         pthread_mutex_unlock(&td->io_u_lock);
1520         free(td->verify_threads);
1521         td->verify_threads = NULL;
1522 }
1523
1524 int paste_blockoff(char *buf, unsigned int len, void *priv)
1525 {
1526         struct io_u *io = priv;
1527         unsigned long long off;
1528
1529         typecheck(__typeof__(off), io->offset);
1530         off = cpu_to_le64((uint64_t)io->offset);
1531         len = min(len, (unsigned int)sizeof(off));
1532         memcpy(buf, &off, len);
1533         return 0;
1534 }
1535
1536 static int __fill_file_completions(struct thread_data *td,
1537                                    struct thread_io_list *s,
1538                                    struct fio_file *f, unsigned int *index)
1539 {
1540         unsigned int comps;
1541         int i, j;
1542
1543         if (!f->last_write_comp)
1544                 return 0;
1545
1546         if (td->io_blocks[DDIR_WRITE] < td->o.iodepth)
1547                 comps = td->io_blocks[DDIR_WRITE];
1548         else
1549                 comps = td->o.iodepth;
1550
1551         j = f->last_write_idx - 1;
1552         for (i = 0; i < comps; i++) {
1553                 if (j == -1)
1554                         j = td->o.iodepth - 1;
1555                 s->comps[*index].fileno = __cpu_to_le64(f->fileno);
1556                 s->comps[*index].offset = cpu_to_le64(f->last_write_comp[j]);
1557                 (*index)++;
1558                 j--;
1559         }
1560
1561         return comps;
1562 }
1563
1564 static int fill_file_completions(struct thread_data *td,
1565                                  struct thread_io_list *s, unsigned int *index)
1566 {
1567         struct fio_file *f;
1568         unsigned int i;
1569         int comps = 0;
1570
1571         for_each_file(td, f, i)
1572                 comps += __fill_file_completions(td, s, f, index);
1573
1574         return comps;
1575 }
1576
1577 struct all_io_list *get_all_io_list(int save_mask, size_t *sz)
1578 {
1579         struct all_io_list *rep;
1580         size_t depth;
1581         void *next;
1582         int nr;
1583
1584         compiletime_assert(sizeof(struct all_io_list) == 8, "all_io_list");
1585
1586         /*
1587          * Calculate reply space needed. We need one 'io_state' per thread,
1588          * and the size will vary depending on depth.
1589          */
1590         depth = 0;
1591         nr = 0;
1592         for_each_td(td) {
1593                 if (save_mask != IO_LIST_ALL && (__td_index + 1) != save_mask)
1594                         continue;
1595                 td->stop_io = 1;
1596                 td->flags |= TD_F_VSTATE_SAVED;
1597                 depth += (td->o.iodepth * td->o.nr_files);
1598                 nr++;
1599         } end_for_each();
1600
1601         if (!nr)
1602                 return NULL;
1603
1604         *sz = sizeof(*rep);
1605         *sz += nr * sizeof(struct thread_io_list);
1606         *sz += depth * sizeof(struct file_comp);
1607         rep = calloc(1, *sz);
1608
1609         rep->threads = cpu_to_le64((uint64_t) nr);
1610
1611         next = &rep->state[0];
1612         for_each_td(td) {
1613                 struct thread_io_list *s = next;
1614                 unsigned int comps, index = 0;
1615
1616                 if (save_mask != IO_LIST_ALL && (__td_index + 1) != save_mask)
1617                         continue;
1618
1619                 comps = fill_file_completions(td, s, &index);
1620
1621                 s->no_comps = cpu_to_le64((uint64_t) comps);
1622                 s->depth = cpu_to_le64((uint64_t) td->o.iodepth);
1623                 s->nofiles = cpu_to_le64((uint64_t) td->o.nr_files);
1624                 s->numberio = cpu_to_le64((uint64_t) td->io_issues[DDIR_WRITE]);
1625                 s->index = cpu_to_le64((uint64_t) __td_index);
1626                 if (td->random_state.use64) {
1627                         s->rand.state64.s[0] = cpu_to_le64(td->random_state.state64.s1);
1628                         s->rand.state64.s[1] = cpu_to_le64(td->random_state.state64.s2);
1629                         s->rand.state64.s[2] = cpu_to_le64(td->random_state.state64.s3);
1630                         s->rand.state64.s[3] = cpu_to_le64(td->random_state.state64.s4);
1631                         s->rand.state64.s[4] = cpu_to_le64(td->random_state.state64.s5);
1632                         s->rand.state64.s[5] = 0;
1633                         s->rand.use64 = cpu_to_le64((uint64_t)1);
1634                 } else {
1635                         s->rand.state32.s[0] = cpu_to_le32(td->random_state.state32.s1);
1636                         s->rand.state32.s[1] = cpu_to_le32(td->random_state.state32.s2);
1637                         s->rand.state32.s[2] = cpu_to_le32(td->random_state.state32.s3);
1638                         s->rand.state32.s[3] = 0;
1639                         s->rand.use64 = 0;
1640                 }
1641                 snprintf((char *) s->name, sizeof(s->name), "%s", td->o.name);
1642                 next = io_list_next(s);
1643         } end_for_each();
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 #ifdef _WIN32
1661         flags |= O_BINARY;
1662 #endif
1663
1664         verify_state_gen_name(out, sizeof(out), name, prefix, num);
1665
1666         fd = open(out, flags, 0644);
1667         if (fd == -1) {
1668                 perror("fio: open state file");
1669                 log_err("fio: state file: %s (for_write=%d)\n", out, for_write);
1670                 return -1;
1671         }
1672
1673         return fd;
1674 }
1675
1676 static int write_thread_list_state(struct thread_io_list *s,
1677                                    const char *prefix)
1678 {
1679         struct verify_state_hdr hdr;
1680         uint64_t crc;
1681         ssize_t ret;
1682         int fd;
1683
1684         fd = open_state_file((const char *) s->name, prefix, s->index, 1);
1685         if (fd == -1)
1686                 return 1;
1687
1688         crc = fio_crc32c((void *)s, thread_io_list_sz(s));
1689
1690         hdr.version = cpu_to_le64((uint64_t) VSTATE_HDR_VERSION);
1691         hdr.size = cpu_to_le64((uint64_t) thread_io_list_sz(s));
1692         hdr.crc = cpu_to_le64(crc);
1693         ret = write(fd, &hdr, sizeof(hdr));
1694         if (ret != sizeof(hdr))
1695                 goto write_fail;
1696
1697         ret = write(fd, s, thread_io_list_sz(s));
1698         if (ret != thread_io_list_sz(s)) {
1699 write_fail:
1700                 if (ret < 0)
1701                         perror("fio: write state file");
1702                 log_err("fio: failed to write state file\n");
1703                 ret = 1;
1704         } else
1705                 ret = 0;
1706
1707         close(fd);
1708         return ret;
1709 }
1710
1711 void __verify_save_state(struct all_io_list *state, const char *prefix)
1712 {
1713         struct thread_io_list *s = &state->state[0];
1714         unsigned int i;
1715
1716         for (i = 0; i < le64_to_cpu(state->threads); i++) {
1717                 write_thread_list_state(s,  prefix);
1718                 s = io_list_next(s);
1719         }
1720 }
1721
1722 void verify_save_state(int mask)
1723 {
1724         struct all_io_list *state;
1725         size_t sz;
1726
1727         state = get_all_io_list(mask, &sz);
1728         if (state) {
1729                 char prefix[PATH_MAX];
1730
1731                 if (aux_path)
1732                         sprintf(prefix, "%s%clocal", aux_path, FIO_OS_PATH_SEPARATOR);
1733                 else
1734                         strcpy(prefix, "local");
1735
1736                 __verify_save_state(state, prefix);
1737                 free(state);
1738         }
1739 }
1740
1741 void verify_free_state(struct thread_data *td)
1742 {
1743         if (td->vstate)
1744                 free(td->vstate);
1745 }
1746
1747 void verify_assign_state(struct thread_data *td, void *p)
1748 {
1749         struct thread_io_list *s = p;
1750         int i;
1751
1752         s->no_comps = le64_to_cpu(s->no_comps);
1753         s->depth = le32_to_cpu(s->depth);
1754         s->nofiles = le32_to_cpu(s->nofiles);
1755         s->numberio = le64_to_cpu(s->numberio);
1756         s->rand.use64 = le64_to_cpu(s->rand.use64);
1757
1758         if (s->rand.use64) {
1759                 for (i = 0; i < 6; i++)
1760                         s->rand.state64.s[i] = le64_to_cpu(s->rand.state64.s[i]);
1761         } else {
1762                 for (i = 0; i < 4; i++)
1763                         s->rand.state32.s[i] = le32_to_cpu(s->rand.state32.s[i]);
1764         }
1765
1766         for (i = 0; i < s->no_comps; i++) {
1767                 s->comps[i].fileno = le64_to_cpu(s->comps[i].fileno);
1768                 s->comps[i].offset = le64_to_cpu(s->comps[i].offset);
1769         }
1770
1771         td->vstate = p;
1772 }
1773
1774 int verify_state_hdr(struct verify_state_hdr *hdr, struct thread_io_list *s)
1775 {
1776         uint64_t crc;
1777
1778         hdr->version = le64_to_cpu(hdr->version);
1779         hdr->size = le64_to_cpu(hdr->size);
1780         hdr->crc = le64_to_cpu(hdr->crc);
1781
1782         if (hdr->version != VSTATE_HDR_VERSION)
1783                 return 1;
1784
1785         crc = fio_crc32c((void *)s, hdr->size);
1786         if (crc != hdr->crc)
1787                 return 1;
1788
1789         return 0;
1790 }
1791
1792 int verify_load_state(struct thread_data *td, const char *prefix)
1793 {
1794         struct verify_state_hdr hdr;
1795         void *s = NULL;
1796         uint64_t crc;
1797         ssize_t ret;
1798         int fd;
1799
1800         if (!td->o.verify_state)
1801                 return 0;
1802
1803         fd = open_state_file(td->o.name, prefix, td->thread_number - 1, 0);
1804         if (fd == -1)
1805                 return 1;
1806
1807         ret = read(fd, &hdr, sizeof(hdr));
1808         if (ret != sizeof(hdr)) {
1809                 if (ret < 0)
1810                         td_verror(td, errno, "read verify state hdr");
1811                 log_err("fio: failed reading verify state header\n");
1812                 goto err;
1813         }
1814
1815         hdr.version = le64_to_cpu(hdr.version);
1816         hdr.size = le64_to_cpu(hdr.size);
1817         hdr.crc = le64_to_cpu(hdr.crc);
1818
1819         if (hdr.version != VSTATE_HDR_VERSION) {
1820                 log_err("fio: unsupported (%d) version in verify state header\n",
1821                                 (unsigned int) hdr.version);
1822                 goto err;
1823         }
1824
1825         s = malloc(hdr.size);
1826         ret = read(fd, s, hdr.size);
1827         if (ret != hdr.size) {
1828                 if (ret < 0)
1829                         td_verror(td, errno, "read verify state");
1830                 log_err("fio: failed reading verity state\n");
1831                 goto err;
1832         }
1833
1834         crc = fio_crc32c(s, hdr.size);
1835         if (crc != hdr.crc) {
1836                 log_err("fio: verify state is corrupt\n");
1837                 goto err;
1838         }
1839
1840         close(fd);
1841
1842         verify_assign_state(td, s);
1843         return 0;
1844 err:
1845         if (s)
1846                 free(s);
1847         close(fd);
1848         return 1;
1849 }
1850
1851 /*
1852  * Use the loaded verify state to know when to stop doing verification
1853  */
1854 int verify_state_should_stop(struct thread_data *td, struct io_u *io_u)
1855 {
1856         struct thread_io_list *s = td->vstate;
1857         struct fio_file *f = io_u->file;
1858         int i;
1859
1860         if (!s || !f)
1861                 return 0;
1862
1863         /*
1864          * If we're not into the window of issues - depth yet, continue. If
1865          * issue is shorter than depth, do check.
1866          */
1867         if ((td->io_blocks[DDIR_READ] < s->depth ||
1868             s->numberio - td->io_blocks[DDIR_READ] > s->depth) &&
1869             s->numberio > s->depth)
1870                 return 0;
1871
1872         /*
1873          * We're in the window of having to check if this io was
1874          * completed or not. If the IO was seen as completed, then
1875          * lets verify it.
1876          */
1877         for (i = 0; i < s->no_comps; i++) {
1878                 if (s->comps[i].fileno != f->fileno)
1879                         continue;
1880                 if (io_u->verify_offset == s->comps[i].offset)
1881                         return 0;
1882         }
1883
1884         /*
1885          * Not found, we have to stop
1886          */
1887         return 1;
1888 }