verify.c

   1 /*
   2  * IO verification helpers
   3  */
   4 #include <unistd.h>
   5 #include <fcntl.h>
   6 #include <string.h>
   7 #include <assert.h>
   8 #include <pthread.h>
   9 #include <libgen.h>
  10
  11 #include "fio.h"
  12 #include "verify.h"
  13 #include "trim.h"
  14 #include "lib/rand.h"
  15 #include "lib/hweight.h"
  16 #include "lib/pattern.h"
  17
  18 #include "crc/md5.h"
  19 #include "crc/crc64.h"
  20 #include "crc/crc32.h"
  21 #include "crc/crc32c.h"
  22 #include "crc/crc16.h"
  23 #include "crc/crc7.h"
  24 #include "crc/sha256.h"
  25 #include "crc/sha512.h"
  26 #include "crc/sha1.h"
  27 #include "crc/xxhash.h"
  28 #include "crc/sha3.h"
  29
  30 static void populate_hdr(struct thread_data *td, struct io_u *io_u,
  31                          struct verify_header *hdr, unsigned int header_num,
  32                          unsigned int header_len);
  33 static void fill_hdr(struct thread_data *td, struct io_u *io_u,
  34                      struct verify_header *hdr, unsigned int header_num,
  35                      unsigned int header_len, uint64_t rand_seed);
  36 static void __fill_hdr(struct thread_data *td, struct io_u *io_u,
  37                        struct verify_header *hdr, unsigned int header_num,
  38                        unsigned int header_len, uint64_t rand_seed);
  39
  40 void fill_buffer_pattern(struct thread_data *td, void *p, unsigned int len)
  41 {
  42         (void)cpy_pattern(td->o.buffer_pattern, td->o.buffer_pattern_bytes, p, len);
  43 }
  44
  45 static void __fill_buffer(struct thread_options *o, unsigned long seed, void *p,
  46                           unsigned int len)
  47 {
  48         __fill_random_buf_percentage(seed, p, o->compress_percentage, len, len, o->buffer_pattern, o->buffer_pattern_bytes);
  49 }
  50
  51 static unsigned long fill_buffer(struct thread_data *td, void *p,
  52                                  unsigned int len)
  53 {
  54         struct frand_state *fs = &td->verify_state;
  55         struct thread_options *o = &td->o;
  56
  57         return fill_random_buf_percentage(fs, p, o->compress_percentage, len, len, o->buffer_pattern, o->buffer_pattern_bytes);
  58 }
  59
  60 void fill_verify_pattern(struct thread_data *td, void *p, unsigned int len,
  61                          struct io_u *io_u, unsigned long seed, int use_seed)
  62 {
  63         struct thread_options *o = &td->o;
  64
  65         if (!o->verify_pattern_bytes) {
  66                 dprint(FD_VERIFY, "fill random bytes len=%u\n", len);
  67
  68                 if (use_seed)
  69                         __fill_buffer(o, seed, p, len);
  70                 else
  71                         io_u->rand_seed = fill_buffer(td, p, len);
  72                 return;
  73         }
  74
  75         /* Skip if we were here and we do not need to patch pattern
  76          * with format */
  77         if (!td->o.verify_fmt_sz && io_u->buf_filled_len >= len) {
  78                 dprint(FD_VERIFY, "using already filled verify pattern b=%d len=%u\n",
  79                         o->verify_pattern_bytes, len);
  80                 return;
  81         }
  82
  83         (void)paste_format(td->o.verify_pattern, td->o.verify_pattern_bytes,
  84                            td->o.verify_fmt, td->o.verify_fmt_sz,
  85                            p, len, io_u);
  86         io_u->buf_filled_len = len;
  87 }
  88
  89 static unsigned int get_hdr_inc(struct thread_data *td, struct io_u *io_u)
  90 {
  91         unsigned int hdr_inc;
  92
  93         hdr_inc = io_u->buflen;
  94         if (td->o.verify_interval && td->o.verify_interval <= io_u->buflen)
  95                 hdr_inc = td->o.verify_interval;
  96
  97         return hdr_inc;
  98 }
  99
 100 static void fill_pattern_headers(struct thread_data *td, struct io_u *io_u,
 101                                  unsigned long seed, int use_seed)
 102 {
 103         unsigned int hdr_inc, header_num;
 104         struct verify_header *hdr;
 105         void *p = io_u->buf;
 106
 107         fill_verify_pattern(td, p, io_u->buflen, io_u, seed, use_seed);
 108
 109         hdr_inc = get_hdr_inc(td, io_u);
 110         header_num = 0;
 111         for (; p < io_u->buf + io_u->buflen; p += hdr_inc) {
 112                 hdr = p;
 113                 populate_hdr(td, io_u, hdr, header_num, hdr_inc);
 114                 header_num++;
 115         }
 116 }
 117
 118 static void memswp(void *buf1, void *buf2, unsigned int len)
 119 {
 120         char swap[200];
 121
 122         assert(len <= sizeof(swap));
 123
 124         memcpy(&swap, buf1, len);
 125         memcpy(buf1, buf2, len);
 126         memcpy(buf2, &swap, len);
 127 }
 128
 129 static void hexdump(void *buffer, int len)
 130 {
 131         unsigned char *p = buffer;
 132         int i;
 133
 134         for (i = 0; i < len; i++)
 135                 log_err("%02x", p[i]);
 136         log_err("\n");
 137 }
 138
 139 /*
 140  * Prepare for separation of verify_header and checksum header
 141  */
 142 static inline unsigned int __hdr_size(int verify_type)
 143 {
 144         unsigned int len = 0;
 145
 146         switch (verify_type) {
 147         case VERIFY_NONE:
 148         case VERIFY_HDR_ONLY:
 149         case VERIFY_NULL:
 150         case VERIFY_PATTERN:
 151                 len = 0;
 152                 break;
 153         case VERIFY_MD5:
 154                 len = sizeof(struct vhdr_md5);
 155                 break;
 156         case VERIFY_CRC64:
 157                 len = sizeof(struct vhdr_crc64);
 158                 break;
 159         case VERIFY_CRC32C:
 160         case VERIFY_CRC32:
 161         case VERIFY_CRC32C_INTEL:
 162                 len = sizeof(struct vhdr_crc32);
 163                 break;
 164         case VERIFY_CRC16:
 165                 len = sizeof(struct vhdr_crc16);
 166                 break;
 167         case VERIFY_CRC7:
 168                 len = sizeof(struct vhdr_crc7);
 169                 break;
 170         case VERIFY_SHA256:
 171                 len = sizeof(struct vhdr_sha256);
 172                 break;
 173         case VERIFY_SHA512:
 174                 len = sizeof(struct vhdr_sha512);
 175                 break;
 176         case VERIFY_SHA3_224:
 177                 len = sizeof(struct vhdr_sha3_224);
 178                 break;
 179         case VERIFY_SHA3_256:
 180                 len = sizeof(struct vhdr_sha3_256);
 181                 break;
 182         case VERIFY_SHA3_384:
 183                 len = sizeof(struct vhdr_sha3_384);
 184                 break;
 185         case VERIFY_SHA3_512:
 186                 len = sizeof(struct vhdr_sha3_512);
 187                 break;
 188         case VERIFY_XXHASH:
 189                 len = sizeof(struct vhdr_xxhash);
 190                 break;
 191         case VERIFY_SHA1:
 192                 len = sizeof(struct vhdr_sha1);
 193                 break;
 194         case VERIFY_PATTERN_NO_HDR:
 195                 return 0;
 196         default:
 197                 log_err("fio: unknown verify header!\n");
 198                 assert(0);
 199         }
 200
 201         return len + sizeof(struct verify_header);
 202 }
 203
 204 static inline unsigned int hdr_size(struct thread_data *td,
 205                                     struct verify_header *hdr)
 206 {
 207         if (td->o.verify == VERIFY_PATTERN_NO_HDR)
 208                 return 0;
 209
 210         return __hdr_size(hdr->verify_type);
 211 }
 212
 213 static void *hdr_priv(struct verify_header *hdr)
 214 {
 215         void *priv = hdr;
 216
 217         return priv + sizeof(struct verify_header);
 218 }
 219
 220 /*
 221  * Verify container, pass info to verify handlers and allow them to
 222  * pass info back in case of error
 223  */
 224 struct vcont {
 225         /*
 226          * Input
 227          */
 228         struct io_u *io_u;
 229         unsigned int hdr_num;
 230         struct thread_data *td;
 231
 232         /*
 233          * Output, only valid in case of error
 234          */
 235         const char *name;
 236         void *good_crc;
 237         void *bad_crc;
 238         unsigned int crc_len;
 239 };
 240
 241 #define DUMP_BUF_SZ     255
 242 static int dump_buf_warned;
 243
 244 static void dump_buf(char *buf, unsigned int len, unsigned long long offset,
 245                      const char *type, struct fio_file *f)
 246 {
 247         char *ptr, fname[DUMP_BUF_SZ];
 248         size_t buf_left = DUMP_BUF_SZ;
 249         int ret, fd;
 250
 251         ptr = strdup(f->file_name);
 252
 253         memset(fname, 0, sizeof(fname));
 254         if (aux_path)
 255                 sprintf(fname, "%s%s", aux_path, FIO_OS_PATH_SEPARATOR);
 256
 257         strncpy(fname + strlen(fname), basename(ptr), buf_left - 1);
 258
 259         buf_left -= strlen(fname);
 260         if (buf_left <= 0) {
 261                 if (!dump_buf_warned) {
 262                         log_err("fio: verify failure dump buffer too small\n");
 263                         dump_buf_warned = 1;
 264                 }
 265                 free(ptr);
 266                 return;
 267         }
 268
 269         snprintf(fname + strlen(fname), buf_left, ".%llu.%s", offset, type);
 270
 271         fd = open(fname, O_CREAT | O_TRUNC | O_WRONLY, 0644);
 272         if (fd < 0) {
 273                 perror("open verify buf file");
 274                 free(ptr);
 275                 return;
 276         }
 277
 278         while (len) {
 279                 ret = write(fd, buf, len);
 280                 if (!ret)
 281                         break;
 282                 else if (ret < 0) {
 283                         perror("write verify buf file");
 284                         break;
 285                 }
 286                 len -= ret;
 287                 buf += ret;
 288         }
 289
 290         close(fd);
 291         log_err("       %s data dumped as %s\n", type, fname);
 292         free(ptr);
 293 }
 294
 295 /*
 296  * Dump the contents of the read block and re-generate the correct data
 297  * and dump that too.
 298  */
 299 static void __dump_verify_buffers(struct verify_header *hdr, struct vcont *vc)
 300 {
 301         struct thread_data *td = vc->td;
 302         struct io_u *io_u = vc->io_u;
 303         unsigned long hdr_offset;
 304         struct io_u dummy;
 305         void *buf;
 306
 307         if (!td->o.verify_dump)
 308                 return;
 309
 310         /*
 311          * Dump the contents we just read off disk
 312          */
 313         hdr_offset = vc->hdr_num * hdr->len;
 314
 315         dump_buf(io_u->buf + hdr_offset, hdr->len, io_u->offset + hdr_offset,
 316                         "received", vc->io_u->file);
 317
 318         /*
 319          * Allocate a new buf and re-generate the original data
 320          */
 321         buf = malloc(io_u->buflen);
 322         dummy = *io_u;
 323         dummy.buf = buf;
 324         dummy.rand_seed = hdr->rand_seed;
 325         dummy.buf_filled_len = 0;
 326         dummy.buflen = io_u->buflen;
 327
 328         fill_pattern_headers(td, &dummy, hdr->rand_seed, 1);
 329
 330         dump_buf(buf + hdr_offset, hdr->len, io_u->offset + hdr_offset,
 331                         "expected", vc->io_u->file);
 332         free(buf);
 333 }
 334
 335 static void dump_verify_buffers(struct verify_header *hdr, struct vcont *vc)
 336 {
 337         struct thread_data *td = vc->td;
 338         struct verify_header shdr;
 339
 340         if (td->o.verify == VERIFY_PATTERN_NO_HDR) {
 341                 __fill_hdr(td, vc->io_u, &shdr, 0, vc->io_u->buflen, 0);
 342                 hdr = &shdr;
 343         }
 344
 345         __dump_verify_buffers(hdr, vc);
 346 }
 347
 348 static void log_verify_failure(struct verify_header *hdr, struct vcont *vc)
 349 {
 350         unsigned long long offset;
 351
 352         offset = vc->io_u->offset;
 353         offset += vc->hdr_num * hdr->len;
 354         log_err("%.8s: verify failed at file %s offset %llu, length %u\n",
 355                         vc->name, vc->io_u->file->file_name, offset, hdr->len);
 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", i);
 410                         vc->name = "pattern";
 411                         log_verify_failure(hdr, vc);
 412                         return EILSEQ;
 413                 }
 414                 mod++;
 415                 if (mod == td->o.verify_pattern_bytes)
 416                         mod = 0;
 417         }
 418
 419         /* Unreachable line */
 420         assert(0);
 421         return EILSEQ;
 422 }
 423
 424 static int verify_io_u_xxhash(struct verify_header *hdr, struct vcont *vc)
 425 {
 426         void *p = io_u_verify_off(hdr, vc);
 427         struct vhdr_xxhash *vh = hdr_priv(hdr);
 428         uint32_t hash;
 429         void *state;
 430
 431         dprint(FD_VERIFY, "xxhash verify io_u %p, len %u\n", vc->io_u, hdr->len);
 432
 433         state = XXH32_init(1);
 434         XXH32_update(state, p, hdr->len - hdr_size(vc->td, hdr));
 435         hash = XXH32_digest(state);
 436
 437         if (vh->hash == hash)
 438                 return 0;
 439
 440         vc->name = "xxhash";
 441         vc->good_crc = &vh->hash;
 442         vc->bad_crc = &hash;
 443         vc->crc_len = sizeof(hash);
 444         log_verify_failure(hdr, vc);
 445         return EILSEQ;
 446 }
 447
 448 static int verify_io_u_sha3(struct verify_header *hdr, struct vcont *vc,
 449                             struct fio_sha3_ctx *sha3_ctx, uint8_t *sha,
 450                             unsigned int sha_size, const char *name)
 451 {
 452         void *p = io_u_verify_off(hdr, vc);
 453
 454         dprint(FD_VERIFY, "%s verify io_u %p, len %u\n", name, vc->io_u, hdr->len);
 455
 456         fio_sha3_update(sha3_ctx, p, hdr->len - hdr_size(vc->td, hdr));
 457         fio_sha3_final(sha3_ctx);
 458
 459         if (!memcmp(sha, sha3_ctx->sha, sha_size))
 460                 return 0;
 461
 462         vc->name = name;
 463         vc->good_crc = sha;
 464         vc->bad_crc = sha3_ctx->sha;
 465         vc->crc_len = sha_size;
 466         log_verify_failure(hdr, vc);
 467         return EILSEQ;
 468 }
 469
 470 static int verify_io_u_sha3_224(struct verify_header *hdr, struct vcont *vc)
 471 {
 472         struct vhdr_sha3_224 *vh = hdr_priv(hdr);
 473         uint8_t sha[SHA3_224_DIGEST_SIZE];
 474         struct fio_sha3_ctx sha3_ctx = {
 475                 .sha = sha,
 476         };
 477
 478         fio_sha3_224_init(&sha3_ctx);
 479
 480         return verify_io_u_sha3(hdr, vc, &sha3_ctx, vh->sha,
 481                                 SHA3_224_DIGEST_SIZE, "sha3-224");
 482 }
 483
 484 static int verify_io_u_sha3_256(struct verify_header *hdr, struct vcont *vc)
 485 {
 486         struct vhdr_sha3_256 *vh = hdr_priv(hdr);
 487         uint8_t sha[SHA3_256_DIGEST_SIZE];
 488         struct fio_sha3_ctx sha3_ctx = {
 489                 .sha = sha,
 490         };
 491
 492         fio_sha3_256_init(&sha3_ctx);
 493
 494         return verify_io_u_sha3(hdr, vc, &sha3_ctx, vh->sha,
 495                                 SHA3_256_DIGEST_SIZE, "sha3-256");
 496 }
 497
 498 static int verify_io_u_sha3_384(struct verify_header *hdr, struct vcont *vc)
 499 {
 500         struct vhdr_sha3_384 *vh = hdr_priv(hdr);
 501         uint8_t sha[SHA3_384_DIGEST_SIZE];
 502         struct fio_sha3_ctx sha3_ctx = {
 503                 .sha = sha,
 504         };
 505
 506         fio_sha3_384_init(&sha3_ctx);
 507
 508         return verify_io_u_sha3(hdr, vc, &sha3_ctx, vh->sha,
 509                                 SHA3_384_DIGEST_SIZE, "sha3-384");
 510 }
 511
 512 static int verify_io_u_sha3_512(struct verify_header *hdr, struct vcont *vc)
 513 {
 514         struct vhdr_sha3_512 *vh = hdr_priv(hdr);
 515         uint8_t sha[SHA3_512_DIGEST_SIZE];
 516         struct fio_sha3_ctx sha3_ctx = {
 517                 .sha = sha,
 518         };
 519
 520         fio_sha3_512_init(&sha3_ctx);
 521
 522         return verify_io_u_sha3(hdr, vc, &sha3_ctx, vh->sha,
 523                                 SHA3_512_DIGEST_SIZE, "sha3-512");
 524 }
 525
 526 static int verify_io_u_sha512(struct verify_header *hdr, struct vcont *vc)
 527 {
 528         void *p = io_u_verify_off(hdr, vc);
 529         struct vhdr_sha512 *vh = hdr_priv(hdr);
 530         uint8_t sha512[128];
 531         struct fio_sha512_ctx sha512_ctx = {
 532                 .buf = sha512,
 533         };
 534
 535         dprint(FD_VERIFY, "sha512 verify io_u %p, len %u\n", vc->io_u, hdr->len);
 536
 537         fio_sha512_init(&sha512_ctx);
 538         fio_sha512_update(&sha512_ctx, p, hdr->len - hdr_size(vc->td, hdr));
 539
 540         if (!memcmp(vh->sha512, sha512_ctx.buf, sizeof(sha512)))
 541                 return 0;
 542
 543         vc->name = "sha512";
 544         vc->good_crc = vh->sha512;
 545         vc->bad_crc = sha512_ctx.buf;
 546         vc->crc_len = sizeof(vh->sha512);
 547         log_verify_failure(hdr, vc);
 548         return EILSEQ;
 549 }
 550
 551 static int verify_io_u_sha256(struct verify_header *hdr, struct vcont *vc)
 552 {
 553         void *p = io_u_verify_off(hdr, vc);
 554         struct vhdr_sha256 *vh = hdr_priv(hdr);
 555         uint8_t sha256[64];
 556         struct fio_sha256_ctx sha256_ctx = {
 557                 .buf = sha256,
 558         };
 559
 560         dprint(FD_VERIFY, "sha256 verify io_u %p, len %u\n", vc->io_u, hdr->len);
 561
 562         fio_sha256_init(&sha256_ctx);
 563         fio_sha256_update(&sha256_ctx, p, hdr->len - hdr_size(vc->td, hdr));
 564         fio_sha256_final(&sha256_ctx);
 565
 566         if (!memcmp(vh->sha256, sha256_ctx.buf, sizeof(sha256)))
 567                 return 0;
 568
 569         vc->name = "sha256";
 570         vc->good_crc = vh->sha256;
 571         vc->bad_crc = sha256_ctx.buf;
 572         vc->crc_len = sizeof(vh->sha256);
 573         log_verify_failure(hdr, vc);
 574         return EILSEQ;
 575 }
 576
 577 static int verify_io_u_sha1(struct verify_header *hdr, struct vcont *vc)
 578 {
 579         void *p = io_u_verify_off(hdr, vc);
 580         struct vhdr_sha1 *vh = hdr_priv(hdr);
 581         uint32_t sha1[5];
 582         struct fio_sha1_ctx sha1_ctx = {
 583                 .H = sha1,
 584         };
 585
 586         dprint(FD_VERIFY, "sha1 verify io_u %p, len %u\n", vc->io_u, hdr->len);
 587
 588         fio_sha1_init(&sha1_ctx);
 589         fio_sha1_update(&sha1_ctx, p, hdr->len - hdr_size(vc->td, hdr));
 590         fio_sha1_final(&sha1_ctx);
 591
 592         if (!memcmp(vh->sha1, sha1_ctx.H, sizeof(sha1)))
 593                 return 0;
 594
 595         vc->name = "sha1";
 596         vc->good_crc = vh->sha1;
 597         vc->bad_crc = sha1_ctx.H;
 598         vc->crc_len = sizeof(vh->sha1);
 599         log_verify_failure(hdr, vc);
 600         return EILSEQ;
 601 }
 602
 603 static int verify_io_u_crc7(struct verify_header *hdr, struct vcont *vc)
 604 {
 605         void *p = io_u_verify_off(hdr, vc);
 606         struct vhdr_crc7 *vh = hdr_priv(hdr);
 607         unsigned char c;
 608
 609         dprint(FD_VERIFY, "crc7 verify io_u %p, len %u\n", vc->io_u, hdr->len);
 610
 611         c = fio_crc7(p, hdr->len - hdr_size(vc->td, hdr));
 612
 613         if (c == vh->crc7)
 614                 return 0;
 615
 616         vc->name = "crc7";
 617         vc->good_crc = &vh->crc7;
 618         vc->bad_crc = &c;
 619         vc->crc_len = 1;
 620         log_verify_failure(hdr, vc);
 621         return EILSEQ;
 622 }
 623
 624 static int verify_io_u_crc16(struct verify_header *hdr, struct vcont *vc)
 625 {
 626         void *p = io_u_verify_off(hdr, vc);
 627         struct vhdr_crc16 *vh = hdr_priv(hdr);
 628         unsigned short c;
 629
 630         dprint(FD_VERIFY, "crc16 verify io_u %p, len %u\n", vc->io_u, hdr->len);
 631
 632         c = fio_crc16(p, hdr->len - hdr_size(vc->td, hdr));
 633
 634         if (c == vh->crc16)
 635                 return 0;
 636
 637         vc->name = "crc16";
 638         vc->good_crc = &vh->crc16;
 639         vc->bad_crc = &c;
 640         vc->crc_len = 2;
 641         log_verify_failure(hdr, vc);
 642         return EILSEQ;
 643 }
 644
 645 static int verify_io_u_crc64(struct verify_header *hdr, struct vcont *vc)
 646 {
 647         void *p = io_u_verify_off(hdr, vc);
 648         struct vhdr_crc64 *vh = hdr_priv(hdr);
 649         unsigned long long c;
 650
 651         dprint(FD_VERIFY, "crc64 verify io_u %p, len %u\n", vc->io_u, hdr->len);
 652
 653         c = fio_crc64(p, hdr->len - hdr_size(vc->td, hdr));
 654
 655         if (c == vh->crc64)
 656                 return 0;
 657
 658         vc->name = "crc64";
 659         vc->good_crc = &vh->crc64;
 660         vc->bad_crc = &c;
 661         vc->crc_len = 8;
 662         log_verify_failure(hdr, vc);
 663         return EILSEQ;
 664 }
 665
 666 static int verify_io_u_crc32(struct verify_header *hdr, struct vcont *vc)
 667 {
 668         void *p = io_u_verify_off(hdr, vc);
 669         struct vhdr_crc32 *vh = hdr_priv(hdr);
 670         uint32_t c;
 671
 672         dprint(FD_VERIFY, "crc32 verify io_u %p, len %u\n", vc->io_u, hdr->len);
 673
 674         c = fio_crc32(p, hdr->len - hdr_size(vc->td, hdr));
 675
 676         if (c == vh->crc32)
 677                 return 0;
 678
 679         vc->name = "crc32";
 680         vc->good_crc = &vh->crc32;
 681         vc->bad_crc = &c;
 682         vc->crc_len = 4;
 683         log_verify_failure(hdr, vc);
 684         return EILSEQ;
 685 }
 686
 687 static int verify_io_u_crc32c(struct verify_header *hdr, struct vcont *vc)
 688 {
 689         void *p = io_u_verify_off(hdr, vc);
 690         struct vhdr_crc32 *vh = hdr_priv(hdr);
 691         uint32_t c;
 692
 693         dprint(FD_VERIFY, "crc32c verify io_u %p, len %u\n", vc->io_u, hdr->len);
 694
 695         c = fio_crc32c(p, hdr->len - hdr_size(vc->td, hdr));
 696
 697         if (c == vh->crc32)
 698                 return 0;
 699
 700         vc->name = "crc32c";
 701         vc->good_crc = &vh->crc32;
 702         vc->bad_crc = &c;
 703         vc->crc_len = 4;
 704         log_verify_failure(hdr, vc);
 705         return EILSEQ;
 706 }
 707
 708 static int verify_io_u_md5(struct verify_header *hdr, struct vcont *vc)
 709 {
 710         void *p = io_u_verify_off(hdr, vc);
 711         struct vhdr_md5 *vh = hdr_priv(hdr);
 712         uint32_t hash[MD5_HASH_WORDS];
 713         struct fio_md5_ctx md5_ctx = {
 714                 .hash = hash,
 715         };
 716
 717         dprint(FD_VERIFY, "md5 verify io_u %p, len %u\n", vc->io_u, hdr->len);
 718
 719         fio_md5_init(&md5_ctx);
 720         fio_md5_update(&md5_ctx, p, hdr->len - hdr_size(vc->td, hdr));
 721         fio_md5_final(&md5_ctx);
 722
 723         if (!memcmp(vh->md5_digest, md5_ctx.hash, sizeof(hash)))
 724                 return 0;
 725
 726         vc->name = "md5";
 727         vc->good_crc = vh->md5_digest;
 728         vc->bad_crc = md5_ctx.hash;
 729         vc->crc_len = sizeof(hash);
 730         log_verify_failure(hdr, vc);
 731         return EILSEQ;
 732 }
 733
 734 /*
 735  * Push IO verification to a separate thread
 736  */
 737 int verify_io_u_async(struct thread_data *td, struct io_u **io_u_ptr)
 738 {
 739         struct io_u *io_u = *io_u_ptr;
 740
 741         pthread_mutex_lock(&td->io_u_lock);
 742
 743         if (io_u->file)
 744                 put_file_log(td, io_u->file);
 745
 746         if (io_u->flags & IO_U_F_IN_CUR_DEPTH) {
 747                 td->cur_depth--;
 748                 io_u_clear(td, io_u, IO_U_F_IN_CUR_DEPTH);
 749         }
 750         flist_add_tail(&io_u->verify_list, &td->verify_list);
 751         *io_u_ptr = NULL;
 752         pthread_mutex_unlock(&td->io_u_lock);
 753
 754         pthread_cond_signal(&td->verify_cond);
 755         return 0;
 756 }
 757
 758 /*
 759  * Thanks Rusty, for spending the time so I don't have to.
 760  *
 761  * http://rusty.ozlabs.org/?p=560
 762  */
 763 static int mem_is_zero(const void *data, size_t length)
 764 {
 765         const unsigned char *p = data;
 766         size_t len;
 767
 768         /* Check first 16 bytes manually */
 769         for (len = 0; len < 16; len++) {
 770                 if (!length)
 771                         return 1;
 772                 if (*p)
 773                         return 0;
 774                 p++;
 775                 length--;
 776         }
 777
 778         /* Now we know that's zero, memcmp with self. */
 779         return memcmp(data, p, length) == 0;
 780 }
 781
 782 static int mem_is_zero_slow(const void *data, size_t length, size_t *offset)
 783 {
 784         const unsigned char *p = data;
 785
 786         *offset = 0;
 787         while (length) {
 788                 if (*p)
 789                         break;
 790                 (*offset)++;
 791                 length--;
 792                 p++;
 793         }
 794
 795         return !length;
 796 }
 797
 798 static int verify_trimmed_io_u(struct thread_data *td, struct io_u *io_u)
 799 {
 800         size_t offset;
 801
 802         if (!td->o.trim_zero)
 803                 return 0;
 804
 805         if (mem_is_zero(io_u->buf, io_u->buflen))
 806                 return 0;
 807
 808         mem_is_zero_slow(io_u->buf, io_u->buflen, &offset);
 809
 810         log_err("trim: verify failed at file %s offset %llu, length %lu"
 811                 ", block offset %lu\n",
 812                         io_u->file->file_name, io_u->offset, io_u->buflen,
 813                         (unsigned long) offset);
 814         return EILSEQ;
 815 }
 816
 817 static int verify_header(struct io_u *io_u, struct thread_data *td,
 818                          struct verify_header *hdr, unsigned int hdr_num,
 819                          unsigned int hdr_len)
 820 {
 821         void *p = hdr;
 822         uint32_t crc;
 823
 824         if (hdr->magic != FIO_HDR_MAGIC) {
 825                 log_err("verify: bad magic header %x, wanted %x",
 826                         hdr->magic, FIO_HDR_MAGIC);
 827                 goto err;
 828         }
 829         if (hdr->len != hdr_len) {
 830                 log_err("verify: bad header length %u, wanted %u",
 831                         hdr->len, hdr_len);
 832                 goto err;
 833         }
 834         if (hdr->rand_seed != io_u->rand_seed) {
 835                 log_err("verify: bad header rand_seed %"PRIu64
 836                         ", wanted %"PRIu64,
 837                         hdr->rand_seed, io_u->rand_seed);
 838                 goto err;
 839         }
 840         if (hdr->offset != io_u->offset + hdr_num * td->o.verify_interval) {
 841                 log_err("verify: bad header offset %"PRIu64
 842                         ", wanted %llu",
 843                         hdr->offset, io_u->offset);
 844                 goto err;
 845         }
 846
 847         /*
 848          * For read-only workloads, the program cannot be certain of the
 849          * last numberio written to a block. Checking of numberio will be
 850          * done only for workloads that write data.  For verify_only,
 851          * numberio will be checked in the last iteration when the correct
 852          * state of numberio, that would have been written to each block
 853          * in a previous run of fio, has been reached.
 854          */
 855         if (td_write(td) && (td_min_bs(td) == td_max_bs(td)) &&
 856             !td->o.time_based)
 857                 if (!td->o.verify_only || td->o.loops == 0)
 858                         if (hdr->numberio != io_u->numberio) {
 859                                 log_err("verify: bad header numberio %"PRIu16
 860                                         ", wanted %"PRIu16,
 861                                         hdr->numberio, io_u->numberio);
 862                                 goto err;
 863                         }
 864
 865         crc = fio_crc32c(p, offsetof(struct verify_header, crc32));
 866         if (crc != hdr->crc32) {
 867                 log_err("verify: bad header crc %x, calculated %x",
 868                         hdr->crc32, crc);
 869                 goto err;
 870         }
 871         return 0;
 872
 873 err:
 874         log_err(" at file %s offset %llu, length %u\n",
 875                 io_u->file->file_name,
 876                 io_u->offset + hdr_num * hdr_len, hdr_len);
 877
 878         if (td->o.verify_dump)
 879                 dump_buf(p, hdr_len, io_u->offset + hdr_num * hdr_len,
 880                                 "hdr_fail", io_u->file);
 881
 882         return EILSEQ;
 883 }
 884
 885 int verify_io_u(struct thread_data *td, struct io_u **io_u_ptr)
 886 {
 887         struct verify_header *hdr;
 888         struct io_u *io_u = *io_u_ptr;
 889         unsigned int header_size, hdr_inc, hdr_num = 0;
 890         void *p;
 891         int ret;
 892
 893         if (td->o.verify == VERIFY_NULL || io_u->ddir != DDIR_READ)
 894                 return 0;
 895         /*
 896          * If the IO engine is faking IO (like null), then just pretend
 897          * we verified everything.
 898          */
 899         if (td_ioengine_flagged(td, FIO_FAKEIO))
 900                 return 0;
 901
 902         if (io_u->flags & IO_U_F_TRIMMED) {
 903                 ret = verify_trimmed_io_u(td, io_u);
 904                 goto done;
 905         }
 906
 907         hdr_inc = get_hdr_inc(td, io_u);
 908
 909         ret = 0;
 910         for (p = io_u->buf; p < io_u->buf + io_u->buflen;
 911              p += hdr_inc, hdr_num++) {
 912                 struct vcont vc = {
 913                         .io_u           = io_u,
 914                         .hdr_num        = hdr_num,
 915                         .td             = td,
 916                 };
 917                 unsigned int verify_type;
 918
 919                 if (ret && td->o.verify_fatal)
 920                         break;
 921
 922                 header_size = __hdr_size(td->o.verify);
 923                 if (td->o.verify_offset)
 924                         memswp(p, p + td->o.verify_offset, header_size);
 925                 hdr = p;
 926
 927                 /*
 928                  * Make rand_seed check pass when have verifysort or
 929                  * verify_backlog.
 930                  */
 931                 if (td->o.verifysort || (td->flags & TD_F_VER_BACKLOG))
 932                         io_u->rand_seed = hdr->rand_seed;
 933
 934                 if (td->o.verify != VERIFY_PATTERN_NO_HDR) {
 935                         ret = verify_header(io_u, td, hdr, hdr_num, hdr_inc);
 936                         if (ret)
 937                                 return ret;
 938                 }
 939
 940                 if (td->o.verify != VERIFY_NONE)
 941                         verify_type = td->o.verify;
 942                 else
 943                         verify_type = hdr->verify_type;
 944
 945                 switch (verify_type) {
 946                 case VERIFY_HDR_ONLY:
 947                         /* Header is always verified, check if pattern is left
 948                          * for verification. */
 949                         if (td->o.verify_pattern_bytes)
 950                                 ret = verify_io_u_pattern(hdr, &vc);
 951                         break;
 952                 case VERIFY_MD5:
 953                         ret = verify_io_u_md5(hdr, &vc);
 954                         break;
 955                 case VERIFY_CRC64:
 956                         ret = verify_io_u_crc64(hdr, &vc);
 957                         break;
 958                 case VERIFY_CRC32C:
 959                 case VERIFY_CRC32C_INTEL:
 960                         ret = verify_io_u_crc32c(hdr, &vc);
 961                         break;
 962                 case VERIFY_CRC32:
 963                         ret = verify_io_u_crc32(hdr, &vc);
 964                         break;
 965                 case VERIFY_CRC16:
 966                         ret = verify_io_u_crc16(hdr, &vc);
 967                         break;
 968                 case VERIFY_CRC7:
 969                         ret = verify_io_u_crc7(hdr, &vc);
 970                         break;
 971                 case VERIFY_SHA256:
 972                         ret = verify_io_u_sha256(hdr, &vc);
 973                         break;
 974                 case VERIFY_SHA512:
 975                         ret = verify_io_u_sha512(hdr, &vc);
 976                         break;
 977                 case VERIFY_SHA3_224:
 978                         ret = verify_io_u_sha3_224(hdr, &vc);
 979                         break;
 980                 case VERIFY_SHA3_256:
 981                         ret = verify_io_u_sha3_256(hdr, &vc);
 982                         break;
 983                 case VERIFY_SHA3_384:
 984                         ret = verify_io_u_sha3_384(hdr, &vc);
 985                         break;
 986                 case VERIFY_SHA3_512:
 987                         ret = verify_io_u_sha3_512(hdr, &vc);
 988                         break;
 989                 case VERIFY_XXHASH:
 990                         ret = verify_io_u_xxhash(hdr, &vc);
 991                         break;
 992                 case VERIFY_SHA1:
 993                         ret = verify_io_u_sha1(hdr, &vc);
 994                         break;
 995                 case VERIFY_PATTERN:
 996                 case VERIFY_PATTERN_NO_HDR:
 997                         ret = verify_io_u_pattern(hdr, &vc);
 998                         break;
 999                 default:
1000                         log_err("Bad verify type %u\n", hdr->verify_type);
1001                         ret = EINVAL;
1002                 }
1003
1004                 if (ret && verify_type != hdr->verify_type)
1005                         log_err("fio: verify type mismatch (%u media, %u given)\n",
1006                                         hdr->verify_type, verify_type);
1007         }
1008
1009 done:
1010         if (ret && td->o.verify_fatal)
1011                 fio_mark_td_terminate(td);
1012
1013         return ret;
1014 }
1015
1016 static void fill_xxhash(struct verify_header *hdr, void *p, unsigned int len)
1017 {
1018         struct vhdr_xxhash *vh = hdr_priv(hdr);
1019         void *state;
1020
1021         state = XXH32_init(1);
1022         XXH32_update(state, p, len);
1023         vh->hash = XXH32_digest(state);
1024 }
1025
1026 static void fill_sha3(struct fio_sha3_ctx *sha3_ctx, void *p, unsigned int len)
1027 {
1028         fio_sha3_update(sha3_ctx, p, len);
1029         fio_sha3_final(sha3_ctx);
1030 }
1031
1032 static void fill_sha3_224(struct verify_header *hdr, void *p, unsigned int len)
1033 {
1034         struct vhdr_sha3_224 *vh = hdr_priv(hdr);
1035         struct fio_sha3_ctx sha3_ctx = {
1036                 .sha = vh->sha,
1037         };
1038
1039         fio_sha3_224_init(&sha3_ctx);
1040         fill_sha3(&sha3_ctx, p, len);
1041 }
1042
1043 static void fill_sha3_256(struct verify_header *hdr, void *p, unsigned int len)
1044 {
1045         struct vhdr_sha3_256 *vh = hdr_priv(hdr);
1046         struct fio_sha3_ctx sha3_ctx = {
1047                 .sha = vh->sha,
1048         };
1049
1050         fio_sha3_256_init(&sha3_ctx);
1051         fill_sha3(&sha3_ctx, p, len);
1052 }
1053
1054 static void fill_sha3_384(struct verify_header *hdr, void *p, unsigned int len)
1055 {
1056         struct vhdr_sha3_384 *vh = hdr_priv(hdr);
1057         struct fio_sha3_ctx sha3_ctx = {
1058                 .sha = vh->sha,
1059         };
1060
1061         fio_sha3_384_init(&sha3_ctx);
1062         fill_sha3(&sha3_ctx, p, len);
1063 }
1064
1065 static void fill_sha3_512(struct verify_header *hdr, void *p, unsigned int len)
1066 {
1067         struct vhdr_sha3_512 *vh = hdr_priv(hdr);
1068         struct fio_sha3_ctx sha3_ctx = {
1069                 .sha = vh->sha,
1070         };
1071
1072         fio_sha3_512_init(&sha3_ctx);
1073         fill_sha3(&sha3_ctx, p, len);
1074 }
1075
1076 static void fill_sha512(struct verify_header *hdr, void *p, unsigned int len)
1077 {
1078         struct vhdr_sha512 *vh = hdr_priv(hdr);
1079         struct fio_sha512_ctx sha512_ctx = {
1080                 .buf = vh->sha512,
1081         };
1082
1083         fio_sha512_init(&sha512_ctx);
1084         fio_sha512_update(&sha512_ctx, p, len);
1085 }
1086
1087 static void fill_sha256(struct verify_header *hdr, void *p, unsigned int len)
1088 {
1089         struct vhdr_sha256 *vh = hdr_priv(hdr);
1090         struct fio_sha256_ctx sha256_ctx = {
1091                 .buf = vh->sha256,
1092         };
1093
1094         fio_sha256_init(&sha256_ctx);
1095         fio_sha256_update(&sha256_ctx, p, len);
1096         fio_sha256_final(&sha256_ctx);
1097 }
1098
1099 static void fill_sha1(struct verify_header *hdr, void *p, unsigned int len)
1100 {
1101         struct vhdr_sha1 *vh = hdr_priv(hdr);
1102         struct fio_sha1_ctx sha1_ctx = {
1103                 .H = vh->sha1,
1104         };
1105
1106         fio_sha1_init(&sha1_ctx);
1107         fio_sha1_update(&sha1_ctx, p, len);
1108         fio_sha1_final(&sha1_ctx);
1109 }
1110
1111 static void fill_crc7(struct verify_header *hdr, void *p, unsigned int len)
1112 {
1113         struct vhdr_crc7 *vh = hdr_priv(hdr);
1114
1115         vh->crc7 = fio_crc7(p, len);
1116 }
1117
1118 static void fill_crc16(struct verify_header *hdr, void *p, unsigned int len)
1119 {
1120         struct vhdr_crc16 *vh = hdr_priv(hdr);
1121
1122         vh->crc16 = fio_crc16(p, len);
1123 }
1124
1125 static void fill_crc32(struct verify_header *hdr, void *p, unsigned int len)
1126 {
1127         struct vhdr_crc32 *vh = hdr_priv(hdr);
1128
1129         vh->crc32 = fio_crc32(p, len);
1130 }
1131
1132 static void fill_crc32c(struct verify_header *hdr, void *p, unsigned int len)
1133 {
1134         struct vhdr_crc32 *vh = hdr_priv(hdr);
1135
1136         vh->crc32 = fio_crc32c(p, len);
1137 }
1138
1139 static void fill_crc64(struct verify_header *hdr, void *p, unsigned int len)
1140 {
1141         struct vhdr_crc64 *vh = hdr_priv(hdr);
1142
1143         vh->crc64 = fio_crc64(p, len);
1144 }
1145
1146 static void fill_md5(struct verify_header *hdr, void *p, unsigned int len)
1147 {
1148         struct vhdr_md5 *vh = hdr_priv(hdr);
1149         struct fio_md5_ctx md5_ctx = {
1150                 .hash = (uint32_t *) vh->md5_digest,
1151         };
1152
1153         fio_md5_init(&md5_ctx);
1154         fio_md5_update(&md5_ctx, p, len);
1155         fio_md5_final(&md5_ctx);
1156 }
1157
1158 static void __fill_hdr(struct thread_data *td, struct io_u *io_u,
1159                        struct verify_header *hdr, unsigned int header_num,
1160                        unsigned int header_len, uint64_t rand_seed)
1161 {
1162         void *p = hdr;
1163
1164         hdr->magic = FIO_HDR_MAGIC;
1165         hdr->verify_type = td->o.verify;
1166         hdr->len = header_len;
1167         hdr->rand_seed = rand_seed;
1168         hdr->offset = io_u->offset + header_num * td->o.verify_interval;
1169         hdr->time_sec = io_u->start_time.tv_sec;
1170         hdr->time_usec = io_u->start_time.tv_nsec / 1000;
1171         hdr->thread = td->thread_number;
1172         hdr->numberio = io_u->numberio;
1173         hdr->crc32 = fio_crc32c(p, offsetof(struct verify_header, crc32));
1174 }
1175
1176
1177 static void fill_hdr(struct thread_data *td, struct io_u *io_u,
1178                      struct verify_header *hdr, unsigned int header_num,
1179                      unsigned int header_len, uint64_t rand_seed)
1180 {
1181
1182         if (td->o.verify != VERIFY_PATTERN_NO_HDR)
1183                 __fill_hdr(td, io_u, hdr, header_num, header_len, rand_seed);
1184 }
1185
1186 static void populate_hdr(struct thread_data *td, struct io_u *io_u,
1187                          struct verify_header *hdr, unsigned int header_num,
1188                          unsigned int header_len)
1189 {
1190         unsigned int data_len;
1191         void *data;
1192         char *p;
1193
1194         p = (char *) hdr;
1195
1196         fill_hdr(td, io_u, hdr, header_num, header_len, io_u->rand_seed);
1197
1198         data_len = header_len - hdr_size(td, hdr);
1199
1200         data = p + hdr_size(td, hdr);
1201         switch (td->o.verify) {
1202         case VERIFY_MD5:
1203                 dprint(FD_VERIFY, "fill md5 io_u %p, len %u\n",
1204                                                 io_u, hdr->len);
1205                 fill_md5(hdr, data, data_len);
1206                 break;
1207         case VERIFY_CRC64:
1208                 dprint(FD_VERIFY, "fill crc64 io_u %p, len %u\n",
1209                                                 io_u, hdr->len);
1210                 fill_crc64(hdr, data, data_len);
1211                 break;
1212         case VERIFY_CRC32C:
1213         case VERIFY_CRC32C_INTEL:
1214                 dprint(FD_VERIFY, "fill crc32c io_u %p, len %u\n",
1215                                                 io_u, hdr->len);
1216                 fill_crc32c(hdr, data, data_len);
1217                 break;
1218         case VERIFY_CRC32:
1219                 dprint(FD_VERIFY, "fill crc32 io_u %p, len %u\n",
1220                                                 io_u, hdr->len);
1221                 fill_crc32(hdr, data, data_len);
1222                 break;
1223         case VERIFY_CRC16:
1224                 dprint(FD_VERIFY, "fill crc16 io_u %p, len %u\n",
1225                                                 io_u, hdr->len);
1226                 fill_crc16(hdr, data, data_len);
1227                 break;
1228         case VERIFY_CRC7:
1229                 dprint(FD_VERIFY, "fill crc7 io_u %p, len %u\n",
1230                                                 io_u, hdr->len);
1231                 fill_crc7(hdr, data, data_len);
1232                 break;
1233         case VERIFY_SHA256:
1234                 dprint(FD_VERIFY, "fill sha256 io_u %p, len %u\n",
1235                                                 io_u, hdr->len);
1236                 fill_sha256(hdr, data, data_len);
1237                 break;
1238         case VERIFY_SHA512:
1239                 dprint(FD_VERIFY, "fill sha512 io_u %p, len %u\n",
1240                                                 io_u, hdr->len);
1241                 fill_sha512(hdr, data, data_len);
1242                 break;
1243         case VERIFY_SHA3_224:
1244                 dprint(FD_VERIFY, "fill sha3-224 io_u %p, len %u\n",
1245                                                 io_u, hdr->len);
1246                 fill_sha3_224(hdr, data, data_len);
1247                 break;
1248         case VERIFY_SHA3_256:
1249                 dprint(FD_VERIFY, "fill sha3-256 io_u %p, len %u\n",
1250                                                 io_u, hdr->len);
1251                 fill_sha3_256(hdr, data, data_len);
1252                 break;
1253         case VERIFY_SHA3_384:
1254                 dprint(FD_VERIFY, "fill sha3-384 io_u %p, len %u\n",
1255                                                 io_u, hdr->len);
1256                 fill_sha3_384(hdr, data, data_len);
1257                 break;
1258         case VERIFY_SHA3_512:
1259                 dprint(FD_VERIFY, "fill sha3-512 io_u %p, len %u\n",
1260                                                 io_u, hdr->len);
1261                 fill_sha3_512(hdr, data, data_len);
1262                 break;
1263         case VERIFY_XXHASH:
1264                 dprint(FD_VERIFY, "fill xxhash io_u %p, len %u\n",
1265                                                 io_u, hdr->len);
1266                 fill_xxhash(hdr, data, data_len);
1267                 break;
1268         case VERIFY_SHA1:
1269                 dprint(FD_VERIFY, "fill sha1 io_u %p, len %u\n",
1270                                                 io_u, hdr->len);
1271                 fill_sha1(hdr, data, data_len);
1272                 break;
1273         case VERIFY_HDR_ONLY:
1274         case VERIFY_PATTERN:
1275         case VERIFY_PATTERN_NO_HDR:
1276                 /* nothing to do here */
1277                 break;
1278         default:
1279                 log_err("fio: bad verify type: %d\n", td->o.verify);
1280                 assert(0);
1281         }
1282
1283         if (td->o.verify_offset && hdr_size(td, hdr))
1284                 memswp(p, p + td->o.verify_offset, hdr_size(td, hdr));
1285 }
1286
1287 /*
1288  * fill body of io_u->buf with random data and add a header with the
1289  * checksum of choice
1290  */
1291 void populate_verify_io_u(struct thread_data *td, struct io_u *io_u)
1292 {
1293         if (td->o.verify == VERIFY_NULL)
1294                 return;
1295
1296         io_u->numberio = td->io_issues[io_u->ddir];
1297
1298         fill_pattern_headers(td, io_u, 0, 0);
1299 }
1300
1301 int get_next_verify(struct thread_data *td, struct io_u *io_u)
1302 {
1303         struct io_piece *ipo = NULL;
1304
1305         /*
1306          * this io_u is from a requeue, we already filled the offsets
1307          */
1308         if (io_u->file)
1309                 return 0;
1310
1311         if (!RB_EMPTY_ROOT(&td->io_hist_tree)) {
1312                 struct rb_node *n = rb_first(&td->io_hist_tree);
1313
1314                 ipo = rb_entry(n, struct io_piece, rb_node);
1315
1316                 /*
1317                  * Ensure that the associated IO has completed
1318                  */
1319                 read_barrier();
1320                 if (ipo->flags & IP_F_IN_FLIGHT)
1321                         goto nothing;
1322
1323                 rb_erase(n, &td->io_hist_tree);
1324                 assert(ipo->flags & IP_F_ONRB);
1325                 ipo->flags &= ~IP_F_ONRB;
1326         } else if (!flist_empty(&td->io_hist_list)) {
1327                 ipo = flist_first_entry(&td->io_hist_list, struct io_piece, list);
1328
1329                 /*
1330                  * Ensure that the associated IO has completed
1331                  */
1332                 read_barrier();
1333                 if (ipo->flags & IP_F_IN_FLIGHT)
1334                         goto nothing;
1335
1336                 flist_del(&ipo->list);
1337                 assert(ipo->flags & IP_F_ONLIST);
1338                 ipo->flags &= ~IP_F_ONLIST;
1339         }
1340
1341         if (ipo) {
1342                 td->io_hist_len--;
1343
1344                 io_u->offset = ipo->offset;
1345                 io_u->buflen = ipo->len;
1346                 io_u->numberio = ipo->numberio;
1347                 io_u->file = ipo->file;
1348                 io_u_set(td, io_u, IO_U_F_VER_LIST);
1349
1350                 if (ipo->flags & IP_F_TRIMMED)
1351                         io_u_set(td, io_u, IO_U_F_TRIMMED);
1352
1353                 if (!fio_file_open(io_u->file)) {
1354                         int r = td_io_open_file(td, io_u->file);
1355
1356                         if (r) {
1357                                 dprint(FD_VERIFY, "failed file %s open\n",
1358                                                 io_u->file->file_name);
1359                                 return 1;
1360                         }
1361                 }
1362
1363                 get_file(ipo->file);
1364                 assert(fio_file_open(io_u->file));
1365                 io_u->ddir = DDIR_READ;
1366                 io_u->xfer_buf = io_u->buf;
1367                 io_u->xfer_buflen = io_u->buflen;
1368
1369                 remove_trim_entry(td, ipo);
1370                 free(ipo);
1371                 dprint(FD_VERIFY, "get_next_verify: ret io_u %p\n", io_u);
1372
1373                 if (!td->o.verify_pattern_bytes) {
1374                         io_u->rand_seed = __rand(&td->verify_state);
1375                         if (sizeof(int) != sizeof(long *))
1376                                 io_u->rand_seed *= __rand(&td->verify_state);
1377                 }
1378                 return 0;
1379         }
1380
1381 nothing:
1382         dprint(FD_VERIFY, "get_next_verify: empty\n");
1383         return 1;
1384 }
1385
1386 void fio_verify_init(struct thread_data *td)
1387 {
1388         if (td->o.verify == VERIFY_CRC32C_INTEL ||
1389             td->o.verify == VERIFY_CRC32C) {
1390                 crc32c_arm64_probe();
1391                 crc32c_intel_probe();
1392         }
1393 }
1394
1395 static void *verify_async_thread(void *data)
1396 {
1397         struct thread_data *td = data;
1398         struct io_u *io_u;
1399         int ret = 0;
1400
1401         if (fio_option_is_set(&td->o, verify_cpumask) &&
1402             fio_setaffinity(td->pid, td->o.verify_cpumask)) {
1403                 log_err("fio: failed setting verify thread affinity\n");
1404                 goto done;
1405         }
1406
1407         do {
1408                 FLIST_HEAD(list);
1409
1410                 read_barrier();
1411                 if (td->verify_thread_exit)
1412                         break;
1413
1414                 pthread_mutex_lock(&td->io_u_lock);
1415
1416                 while (flist_empty(&td->verify_list) &&
1417                        !td->verify_thread_exit) {
1418                         ret = pthread_cond_wait(&td->verify_cond,
1419                                                         &td->io_u_lock);
1420                         if (ret) {
1421                                 pthread_mutex_unlock(&td->io_u_lock);
1422                                 break;
1423                         }
1424                 }
1425
1426                 flist_splice_init(&td->verify_list, &list);
1427                 pthread_mutex_unlock(&td->io_u_lock);
1428
1429                 if (flist_empty(&list))
1430                         continue;
1431
1432                 while (!flist_empty(&list)) {
1433                         io_u = flist_first_entry(&list, struct io_u, verify_list);
1434                         flist_del_init(&io_u->verify_list);
1435
1436                         io_u_set(td, io_u, IO_U_F_NO_FILE_PUT);
1437                         ret = verify_io_u(td, &io_u);
1438
1439                         put_io_u(td, io_u);
1440                         if (!ret)
1441                                 continue;
1442                         if (td_non_fatal_error(td, ERROR_TYPE_VERIFY_BIT, ret)) {
1443                                 update_error_count(td, ret);
1444                                 td_clear_error(td);
1445                                 ret = 0;
1446                         }
1447                 }
1448         } while (!ret);
1449
1450         if (ret) {
1451                 td_verror(td, ret, "async_verify");
1452                 if (td->o.verify_fatal)
1453                         fio_mark_td_terminate(td);
1454         }
1455
1456 done:
1457         pthread_mutex_lock(&td->io_u_lock);
1458         td->nr_verify_threads--;
1459         pthread_mutex_unlock(&td->io_u_lock);
1460
1461         pthread_cond_signal(&td->free_cond);
1462         return NULL;
1463 }
1464
1465 int verify_async_init(struct thread_data *td)
1466 {
1467         int i, ret;
1468         pthread_attr_t attr;
1469
1470         pthread_attr_init(&attr);
1471         pthread_attr_setstacksize(&attr, 2 * PTHREAD_STACK_MIN);
1472
1473         td->verify_thread_exit = 0;
1474
1475         td->verify_threads = malloc(sizeof(pthread_t) * td->o.verify_async);
1476         for (i = 0; i < td->o.verify_async; i++) {
1477                 ret = pthread_create(&td->verify_threads[i], &attr,
1478                                         verify_async_thread, td);
1479                 if (ret) {
1480                         log_err("fio: async verify creation failed: %s\n",
1481                                         strerror(ret));
1482                         break;
1483                 }
1484                 ret = pthread_detach(td->verify_threads[i]);
1485                 if (ret) {
1486                         log_err("fio: async verify thread detach failed: %s\n",
1487                                         strerror(ret));
1488                         break;
1489                 }
1490                 td->nr_verify_threads++;
1491         }
1492
1493         pthread_attr_destroy(&attr);
1494
1495         if (i != td->o.verify_async) {
1496                 log_err("fio: only %d verify threads started, exiting\n", i);
1497                 td->verify_thread_exit = 1;
1498                 write_barrier();
1499                 pthread_cond_broadcast(&td->verify_cond);
1500                 return 1;
1501         }
1502
1503         return 0;
1504 }
1505
1506 void verify_async_exit(struct thread_data *td)
1507 {
1508         td->verify_thread_exit = 1;
1509         write_barrier();
1510         pthread_cond_broadcast(&td->verify_cond);
1511
1512         pthread_mutex_lock(&td->io_u_lock);
1513
1514         while (td->nr_verify_threads)
1515                 pthread_cond_wait(&td->free_cond, &td->io_u_lock);
1516
1517         pthread_mutex_unlock(&td->io_u_lock);
1518         free(td->verify_threads);
1519         td->verify_threads = NULL;
1520 }
1521
1522 int paste_blockoff(char *buf, unsigned int len, void *priv)
1523 {
1524         struct io_u *io = priv;
1525         unsigned long long off;
1526
1527         typecheck(typeof(off), io->offset);
1528         off = cpu_to_le64((uint64_t)io->offset);
1529         len = min(len, (unsigned int)sizeof(off));
1530         memcpy(buf, &off, len);
1531         return 0;
1532 }
1533
1534 static int __fill_file_completions(struct thread_data *td,
1535                                    struct thread_io_list *s,
1536                                    struct fio_file *f, unsigned int *index)
1537 {
1538         unsigned int comps;
1539         int i, j;
1540
1541         if (!f->last_write_comp)
1542                 return 0;
1543
1544         if (td->io_blocks[DDIR_WRITE] < td->o.iodepth)
1545                 comps = td->io_blocks[DDIR_WRITE];
1546         else
1547                 comps = td->o.iodepth;
1548
1549         j = f->last_write_idx - 1;
1550         for (i = 0; i < comps; i++) {
1551                 if (j == -1)
1552                         j = td->o.iodepth - 1;
1553                 s->comps[*index].fileno = __cpu_to_le64(f->fileno);
1554                 s->comps[*index].offset = cpu_to_le64(f->last_write_comp[j]);
1555                 (*index)++;
1556                 j--;
1557         }
1558
1559         return comps;
1560 }
1561
1562 static int fill_file_completions(struct thread_data *td,
1563                                  struct thread_io_list *s, unsigned int *index)
1564 {
1565         struct fio_file *f;
1566         unsigned int i;
1567         int comps = 0;
1568
1569         for_each_file(td, f, i)
1570                 comps += __fill_file_completions(td, s, f, index);
1571
1572         return comps;
1573 }
1574
1575 struct all_io_list *get_all_io_list(int save_mask, size_t *sz)
1576 {
1577         struct all_io_list *rep;
1578         struct thread_data *td;
1579         size_t depth;
1580         void *next;
1581         int i, nr;
1582
1583         compiletime_assert(sizeof(struct all_io_list) == 8, "all_io_list");
1584
1585         /*
1586          * Calculate reply space needed. We need one 'io_state' per thread,
1587          * and the size will vary depending on depth.
1588          */
1589         depth = 0;
1590         nr = 0;
1591         for_each_td(td, i) {
1592                 if (save_mask != IO_LIST_ALL && (i + 1) != save_mask)
1593                         continue;
1594                 td->stop_io = 1;
1595                 td->flags |= TD_F_VSTATE_SAVED;
1596                 depth += (td->o.iodepth * td->o.nr_files);
1597                 nr++;
1598         }
1599
1600         if (!nr)
1601                 return NULL;
1602
1603         *sz = sizeof(*rep);
1604         *sz += nr * sizeof(struct thread_io_list);
1605         *sz += depth * sizeof(struct file_comp);
1606         rep = malloc(*sz);
1607         memset(rep, 0, *sz);
1608
1609         rep->threads = cpu_to_le64((uint64_t) nr);
1610
1611         next = &rep->state[0];
1612         for_each_td(td, i) {
1613                 struct thread_io_list *s = next;
1614                 unsigned int comps, index = 0;
1615
1616                 if (save_mask != IO_LIST_ALL && (i + 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) i);
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                 s->name[sizeof(s->name) - 1] = '\0';
1642                 strncpy((char *) s->name, td->o.name, sizeof(s->name) - 1);
1643                 next = io_list_next(s);
1644         }
1645
1646         return rep;
1647 }
1648
1649 static int open_state_file(const char *name, const char *prefix, int num,
1650                            int for_write)
1651 {
1652         char out[PATH_MAX];
1653         int flags;
1654         int fd;
1655
1656         if (for_write)
1657                 flags = O_CREAT | O_TRUNC | O_WRONLY | O_SYNC;
1658         else
1659                 flags = O_RDONLY;
1660
1661         verify_state_gen_name(out, sizeof(out), name, prefix, num);
1662
1663         fd = open(out, flags, 0644);
1664         if (fd == -1) {
1665                 perror("fio: open state file");
1666                 log_err("fio: state file: %s (for_write=%d)\n", out, for_write);
1667                 return -1;
1668         }
1669
1670         return fd;
1671 }
1672
1673 static int write_thread_list_state(struct thread_io_list *s,
1674                                    const char *prefix)
1675 {
1676         struct verify_state_hdr hdr;
1677         uint64_t crc;
1678         ssize_t ret;
1679         int fd;
1680
1681         fd = open_state_file((const char *) s->name, prefix, s->index, 1);
1682         if (fd == -1)
1683                 return 1;
1684
1685         crc = fio_crc32c((void *)s, thread_io_list_sz(s));
1686
1687         hdr.version = cpu_to_le64((uint64_t) VSTATE_HDR_VERSION);
1688         hdr.size = cpu_to_le64((uint64_t) thread_io_list_sz(s));
1689         hdr.crc = cpu_to_le64(crc);
1690         ret = write(fd, &hdr, sizeof(hdr));
1691         if (ret != sizeof(hdr))
1692                 goto write_fail;
1693
1694         ret = write(fd, s, thread_io_list_sz(s));
1695         if (ret != thread_io_list_sz(s)) {
1696 write_fail:
1697                 if (ret < 0)
1698                         perror("fio: write state file");
1699                 log_err("fio: failed to write state file\n");
1700                 ret = 1;
1701         } else
1702                 ret = 0;
1703
1704         close(fd);
1705         return ret;
1706 }
1707
1708 void __verify_save_state(struct all_io_list *state, const char *prefix)
1709 {
1710         struct thread_io_list *s = &state->state[0];
1711         unsigned int i;
1712
1713         for (i = 0; i < le64_to_cpu(state->threads); i++) {
1714                 write_thread_list_state(s,  prefix);
1715                 s = io_list_next(s);
1716         }
1717 }
1718
1719 void verify_save_state(int mask)
1720 {
1721         struct all_io_list *state;
1722         size_t sz;
1723
1724         state = get_all_io_list(mask, &sz);
1725         if (state) {
1726                 char prefix[PATH_MAX];
1727
1728                 if (aux_path)
1729                         sprintf(prefix, "%s%slocal", aux_path, FIO_OS_PATH_SEPARATOR);
1730                 else
1731                         strcpy(prefix, "local");
1732
1733                 __verify_save_state(state, prefix);
1734                 free(state);
1735         }
1736 }
1737
1738 void verify_free_state(struct thread_data *td)
1739 {
1740         if (td->vstate)
1741                 free(td->vstate);
1742 }
1743
1744 void verify_assign_state(struct thread_data *td, void *p)
1745 {
1746         struct thread_io_list *s = p;
1747         int i;
1748
1749         s->no_comps = le64_to_cpu(s->no_comps);
1750         s->depth = le32_to_cpu(s->depth);
1751         s->nofiles = le32_to_cpu(s->nofiles);
1752         s->numberio = le64_to_cpu(s->numberio);
1753         s->rand.use64 = le64_to_cpu(s->rand.use64);
1754
1755         if (s->rand.use64) {
1756                 for (i = 0; i < 6; i++)
1757                         s->rand.state64.s[i] = le64_to_cpu(s->rand.state64.s[i]);
1758         } else {
1759                 for (i = 0; i < 4; i++)
1760                         s->rand.state32.s[i] = le32_to_cpu(s->rand.state32.s[i]);
1761         }
1762
1763         for (i = 0; i < s->no_comps; i++) {
1764                 s->comps[i].fileno = le64_to_cpu(s->comps[i].fileno);
1765                 s->comps[i].offset = le64_to_cpu(s->comps[i].offset);
1766         }
1767
1768         td->vstate = p;
1769 }
1770
1771 int verify_state_hdr(struct verify_state_hdr *hdr, struct thread_io_list *s)
1772 {
1773         uint64_t crc;
1774
1775         hdr->version = le64_to_cpu(hdr->version);
1776         hdr->size = le64_to_cpu(hdr->size);
1777         hdr->crc = le64_to_cpu(hdr->crc);
1778
1779         if (hdr->version != VSTATE_HDR_VERSION)
1780                 return 1;
1781
1782         crc = fio_crc32c((void *)s, hdr->size);
1783         if (crc != hdr->crc)
1784                 return 1;
1785
1786         return 0;
1787 }
1788
1789 int verify_load_state(struct thread_data *td, const char *prefix)
1790 {
1791         struct verify_state_hdr hdr;
1792         void *s = NULL;
1793         uint64_t crc;
1794         ssize_t ret;
1795         int fd;
1796
1797         if (!td->o.verify_state)
1798                 return 0;
1799
1800         fd = open_state_file(td->o.name, prefix, td->thread_number - 1, 0);
1801         if (fd == -1)
1802                 return 1;
1803
1804         ret = read(fd, &hdr, sizeof(hdr));
1805         if (ret != sizeof(hdr)) {
1806                 if (ret < 0)
1807                         td_verror(td, errno, "read verify state hdr");
1808                 log_err("fio: failed reading verify state header\n");
1809                 goto err;
1810         }
1811
1812         hdr.version = le64_to_cpu(hdr.version);
1813         hdr.size = le64_to_cpu(hdr.size);
1814         hdr.crc = le64_to_cpu(hdr.crc);
1815
1816         if (hdr.version != VSTATE_HDR_VERSION) {
1817                 log_err("fio: unsupported (%d) version in verify state header\n",
1818                                 (unsigned int) hdr.version);
1819                 goto err;
1820         }
1821
1822         s = malloc(hdr.size);
1823         ret = read(fd, s, hdr.size);
1824         if (ret != hdr.size) {
1825                 if (ret < 0)
1826                         td_verror(td, errno, "read verify state");
1827                 log_err("fio: failed reading verity state\n");
1828                 goto err;
1829         }
1830
1831         crc = fio_crc32c(s, hdr.size);
1832         if (crc != hdr.crc) {
1833                 log_err("fio: verify state is corrupt\n");
1834                 goto err;
1835         }
1836
1837         close(fd);
1838
1839         verify_assign_state(td, s);
1840         return 0;
1841 err:
1842         if (s)
1843                 free(s);
1844         close(fd);
1845         return 1;
1846 }
1847
1848 /*
1849  * Use the loaded verify state to know when to stop doing verification
1850  */
1851 int verify_state_should_stop(struct thread_data *td, struct io_u *io_u)
1852 {
1853         struct thread_io_list *s = td->vstate;
1854         struct fio_file *f = io_u->file;
1855         int i;
1856
1857         if (!s || !f)
1858                 return 0;
1859
1860         /*
1861          * If we're not into the window of issues - depth yet, continue. If
1862          * issue is shorter than depth, do check.
1863          */
1864         if ((td->io_blocks[DDIR_READ] < s->depth ||
1865             s->numberio - td->io_blocks[DDIR_READ] > s->depth) &&
1866             s->numberio > s->depth)
1867                 return 0;
1868
1869         /*
1870          * We're in the window of having to check if this io was
1871          * completed or not. If the IO was seen as completed, then
1872          * lets verify it.
1873          */
1874         for (i = 0; i < s->no_comps; i++) {
1875                 if (s->comps[i].fileno != f->fileno)
1876                         continue;
1877                 if (io_u->offset == s->comps[i].offset)
1878                         return 0;
1879         }
1880
1881         /*
1882          * Not found, we have to stop
1883          */
1884         return 1;
1885 }