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