verify.c

   1 /*
   2  * IO verification helpers
   3  */
   4 #include <unistd.h>
   5 #include <fcntl.h>
   6 #include <string.h>
   7 #include <assert.h>
   8 #include <pthread.h>
   9 #include <libgen.h>
  10
  11 #include "arch/arch.h"
  12 #include "fio.h"
  13 #include "verify.h"
  14 #include "trim.h"
  15 #include "lib/rand.h"
  16 #include "lib/hweight.h"
  17 #include "lib/pattern.h"
  18 #include "oslib/asprintf.h"
  19
  20 #include "crc/md5.h"
  21 #include "crc/crc64.h"
  22 #include "crc/crc32.h"
  23 #include "crc/crc32c.h"
  24 #include "crc/crc16.h"
  25 #include "crc/crc7.h"
  26 #include "crc/sha256.h"
  27 #include "crc/sha512.h"
  28 #include "crc/sha1.h"
  29 #include "crc/xxhash.h"
  30 #include "crc/sha3.h"
  31
  32 static void populate_hdr(struct thread_data *td, struct io_u *io_u,
  33                          struct verify_header *hdr, unsigned int header_num,
  34                          unsigned int header_len);
  35 static void __fill_hdr(struct thread_data *td, struct io_u *io_u,
  36                        struct verify_header *hdr, unsigned int header_num,
  37                        unsigned int header_len, uint64_t rand_seed);
  38
  39 void fill_buffer_pattern(struct thread_data *td, void *p, unsigned int len)
  40 {
  41         (void)cpy_pattern(td->o.buffer_pattern, td->o.buffer_pattern_bytes, p, len);
  42 }
  43
  44 static void __fill_buffer(struct thread_options *o, uint64_t seed, void *p,
  45                           unsigned int len)
  46 {
  47         __fill_random_buf_percentage(seed, p, o->compress_percentage, len, len, o->buffer_pattern, o->buffer_pattern_bytes);
  48 }
  49
  50 void fill_verify_pattern(struct thread_data *td, void *p, unsigned int len,
  51                          struct io_u *io_u, uint64_t seed, int use_seed)
  52 {
  53         struct thread_options *o = &td->o;
  54
  55         if (!o->verify_pattern_bytes) {
  56                 dprint(FD_VERIFY, "fill random bytes len=%u\n", len);
  57
  58                 if (!use_seed) {
  59                         seed = __rand(&td->verify_state);
  60                         if (sizeof(int) != sizeof(long *))
  61                                 seed *= (unsigned long)__rand(&td->verify_state);
  62                 }
  63                 io_u->rand_seed = seed;
  64                 __fill_buffer(o, seed, p, len);
  65                 return;
  66         }
  67
  68         /* Skip if we were here and we do not need to patch pattern
  69          * with format */
  70         if (!td->o.verify_fmt_sz && io_u->buf_filled_len >= len) {
  71                 dprint(FD_VERIFY, "using already filled verify pattern b=%d len=%u\n",
  72                         o->verify_pattern_bytes, len);
  73                 return;
  74         }
  75
  76         (void)paste_format(td->o.verify_pattern, td->o.verify_pattern_bytes,
  77                            td->o.verify_fmt, td->o.verify_fmt_sz,
  78                            p, len, io_u);
  79         io_u->buf_filled_len = len;
  80 }
  81
  82 static unsigned int get_hdr_inc(struct thread_data *td, struct io_u *io_u)
  83 {
  84         unsigned int hdr_inc;
  85
  86         /*
  87          * If we use bs_unaligned, buflen can be larger than the verify
  88          * interval (which just defaults to the smallest blocksize possible).
  89          */
  90         hdr_inc = io_u->buflen;
  91         if (td->o.verify_interval && td->o.verify_interval <= io_u->buflen &&
  92             !td->o.bs_unaligned)
  93                 hdr_inc = td->o.verify_interval;
  94
  95         return hdr_inc;
  96 }
  97
  98 static void fill_pattern_headers(struct thread_data *td, struct io_u *io_u,
  99                                  uint64_t seed, int use_seed)
 100 {
 101         unsigned int hdr_inc, header_num;
 102         struct verify_header *hdr;
 103         void *p = io_u->buf;
 104
 105         fill_verify_pattern(td, p, io_u->buflen, io_u, seed, use_seed);
 106
 107         hdr_inc = get_hdr_inc(td, io_u);
 108         header_num = 0;
 109         for (; p < io_u->buf + io_u->buflen; p += hdr_inc) {
 110                 hdr = p;
 111                 populate_hdr(td, io_u, hdr, header_num, hdr_inc);
 112                 header_num++;
 113         }
 114 }
 115
 116 static void memswp(void *buf1, void *buf2, unsigned int len)
 117 {
 118         char swap[200];
 119
 120         assert(len <= sizeof(swap));
 121
 122         memcpy(&swap, buf1, len);
 123         memcpy(buf1, buf2, len);
 124         memcpy(buf2, &swap, len);
 125 }
 126
 127 static void hexdump(void *buffer, int len)
 128 {
 129         unsigned char *p = buffer;
 130         int i;
 131
 132         for (i = 0; i < len; i++)
 133                 log_err("%02x", p[i]);
 134         log_err("\n");
 135 }
 136
 137 /*
 138  * Prepare for separation of verify_header and checksum header
 139  */
 140 static inline unsigned int __hdr_size(int verify_type)
 141 {
 142         unsigned int len = 0;
 143
 144         switch (verify_type) {
 145         case VERIFY_NONE:
 146         case VERIFY_HDR_ONLY:
 147         case VERIFY_NULL:
 148         case VERIFY_PATTERN:
 149                 len = 0;
 150                 break;
 151         case VERIFY_MD5:
 152                 len = sizeof(struct vhdr_md5);
 153                 break;
 154         case VERIFY_CRC64:
 155                 len = sizeof(struct vhdr_crc64);
 156                 break;
 157         case VERIFY_CRC32C:
 158         case VERIFY_CRC32:
 159         case VERIFY_CRC32C_INTEL:
 160                 len = sizeof(struct vhdr_crc32);
 161                 break;
 162         case VERIFY_CRC16:
 163                 len = sizeof(struct vhdr_crc16);
 164                 break;
 165         case VERIFY_CRC7:
 166                 len = sizeof(struct vhdr_crc7);
 167                 break;
 168         case VERIFY_SHA256:
 169                 len = sizeof(struct vhdr_sha256);
 170                 break;
 171         case VERIFY_SHA512:
 172                 len = sizeof(struct vhdr_sha512);
 173                 break;
 174         case VERIFY_SHA3_224:
 175                 len = sizeof(struct vhdr_sha3_224);
 176                 break;
 177         case VERIFY_SHA3_256:
 178                 len = sizeof(struct vhdr_sha3_256);
 179                 break;
 180         case VERIFY_SHA3_384:
 181                 len = sizeof(struct vhdr_sha3_384);
 182                 break;
 183         case VERIFY_SHA3_512:
 184                 len = sizeof(struct vhdr_sha3_512);
 185                 break;
 186         case VERIFY_XXHASH:
 187                 len = sizeof(struct vhdr_xxhash);
 188                 break;
 189         case VERIFY_SHA1:
 190                 len = sizeof(struct vhdr_sha1);
 191                 break;
 192         case VERIFY_PATTERN_NO_HDR:
 193                 return 0;
 194         default:
 195                 log_err("fio: unknown verify header!\n");
 196                 assert(0);
 197         }
 198
 199         return len + sizeof(struct verify_header);
 200 }
 201
 202 static inline unsigned int hdr_size(struct thread_data *td,
 203                                     struct verify_header *hdr)
 204 {
 205         if (td->o.verify == VERIFY_PATTERN_NO_HDR)
 206                 return 0;
 207
 208         return __hdr_size(hdr->verify_type);
 209 }
 210
 211 static void *hdr_priv(struct verify_header *hdr)
 212 {
 213         void *priv = hdr;
 214
 215         return priv + sizeof(struct verify_header);
 216 }
 217
 218 /*
 219  * Verify container, pass info to verify handlers and allow them to
 220  * pass info back in case of error
 221  */
 222 struct vcont {
 223         /*
 224          * Input
 225          */
 226         struct io_u *io_u;
 227         unsigned int hdr_num;
 228         struct thread_data *td;
 229
 230         /*
 231          * Output, only valid in case of error
 232          */
 233         const char *name;
 234         void *good_crc;
 235         void *bad_crc;
 236         unsigned int crc_len;
 237 };
 238
 239 #define DUMP_BUF_SZ     255
 240
 241 static void dump_buf(char *buf, unsigned int len, unsigned long long offset,
 242                      const char *type, struct fio_file *f)
 243 {
 244         char *ptr, *fname;
 245         char sep[2] = { FIO_OS_PATH_SEPARATOR, 0 };
 246         int ret, fd;
 247
 248         ptr = strdup(f->file_name);
 249
 250         if (asprintf(&fname, "%s%s%s.%llu.%s", aux_path ? : "",
 251                      aux_path ? sep : "", basename(ptr), offset, type) < 0) {
 252                 if (!fio_did_warn(FIO_WARN_VERIFY_BUF))
 253                         log_err("fio: not enough memory for dump buffer filename\n");
 254                 goto free_ptr;
 255         }
 256
 257         fd = open(fname, O_CREAT | O_TRUNC | O_WRONLY, 0644);
 258         if (fd < 0) {
 259                 perror("open verify buf file");
 260                 goto free_fname;
 261         }
 262
 263         while (len) {
 264                 ret = write(fd, buf, len);
 265                 if (!ret)
 266                         break;
 267                 else if (ret < 0) {
 268                         perror("write verify buf file");
 269                         break;
 270                 }
 271                 len -= ret;
 272                 buf += ret;
 273         }
 274
 275         close(fd);
 276         log_err("       %s data dumped as %s\n", type, fname);
 277
 278 free_fname:
 279         free(fname);
 280
 281 free_ptr:
 282         free(ptr);
 283 }
 284
 285 /*
 286  * Dump the contents of the read block and re-generate the correct data
 287  * and dump that too.
 288  */
 289 static void __dump_verify_buffers(struct verify_header *hdr, struct vcont *vc)
 290 {
 291         struct thread_data *td = vc->td;
 292         struct io_u *io_u = vc->io_u;
 293         unsigned long hdr_offset;
 294         struct io_u dummy;
 295         void *buf;
 296
 297         if (!td->o.verify_dump)
 298                 return;
 299
 300         /*
 301          * Dump the contents we just read off disk
 302          */
 303         hdr_offset = vc->hdr_num * hdr->len;
 304
 305         dump_buf(io_u->buf + hdr_offset, hdr->len, io_u->verify_offset + hdr_offset,
 306                         "received", vc->io_u->file);
 307
 308         /*
 309          * Allocate a new buf and re-generate the original data
 310          */
 311         buf = malloc(io_u->buflen);
 312         dummy = *io_u;
 313         dummy.buf = buf;
 314         dummy.rand_seed = hdr->rand_seed;
 315         dummy.buf_filled_len = 0;
 316         dummy.buflen = io_u->buflen;
 317
 318         fill_pattern_headers(td, &dummy, hdr->rand_seed, 1);
 319
 320         dump_buf(buf + hdr_offset, hdr->len, io_u->verify_offset + hdr_offset,
 321                         "expected", vc->io_u->file);
 322         free(buf);
 323 }
 324
 325 static void dump_verify_buffers(struct verify_header *hdr, struct vcont *vc)
 326 {
 327         struct thread_data *td = vc->td;
 328         struct verify_header shdr;
 329
 330         if (td->o.verify == VERIFY_PATTERN_NO_HDR) {
 331                 __fill_hdr(td, vc->io_u, &shdr, 0, vc->io_u->buflen, 0);
 332                 hdr = &shdr;
 333         }
 334
 335         __dump_verify_buffers(hdr, vc);
 336 }
 337
 338 static void log_verify_failure(struct verify_header *hdr, struct vcont *vc)
 339 {
 340         unsigned long long offset;
 341
 342         offset = vc->io_u->verify_offset;
 343         offset += vc->hdr_num * hdr->len;
 344         log_err("%.8s: verify failed at file %s offset %llu, length %u"
 345                         " (requested block: offset=%llu, length=%llu, flags=%x)\n",
 346                         vc->name, vc->io_u->file->file_name, offset, hdr->len,
 347                         vc->io_u->verify_offset, vc->io_u->buflen, vc->io_u->flags);
 348
 349         if (vc->good_crc && vc->bad_crc) {
 350                 log_err("       Expected CRC: ");
 351                 hexdump(vc->good_crc, vc->crc_len);
 352                 log_err("       Received CRC: ");
 353                 hexdump(vc->bad_crc, vc->crc_len);
 354         }
 355
 356         dump_verify_buffers(hdr, vc);
 357 }
 358
 359 /*
 360  * Return data area 'header_num'
 361  */
 362 static inline void *io_u_verify_off(struct verify_header *hdr, struct vcont *vc)
 363 {
 364         return vc->io_u->buf + vc->hdr_num * hdr->len + hdr_size(vc->td, hdr);
 365 }
 366
 367 static int verify_io_u_pattern(struct verify_header *hdr, struct vcont *vc)
 368 {
 369         struct thread_data *td = vc->td;
 370         struct io_u *io_u = vc->io_u;
 371         char *buf, *pattern;
 372         unsigned int header_size = __hdr_size(td->o.verify);
 373         unsigned int len, mod, i, pattern_size;
 374         int rc;
 375
 376         pattern = td->o.verify_pattern;
 377         pattern_size = td->o.verify_pattern_bytes;
 378         assert(pattern_size != 0);
 379
 380         (void)paste_format_inplace(pattern, pattern_size,
 381                                    td->o.verify_fmt, td->o.verify_fmt_sz, io_u);
 382
 383         buf = (char *) hdr + header_size;
 384         len = get_hdr_inc(td, io_u) - header_size;
 385         mod = (get_hdr_inc(td, io_u) * vc->hdr_num + header_size) % pattern_size;
 386
 387         rc = cmp_pattern(pattern, pattern_size, mod, buf, len);
 388         if (!rc)
 389                 return 0;
 390
 391         /* Slow path, compare each byte */
 392         for (i = 0; i < len; i++) {
 393                 if (buf[i] != pattern[mod]) {
 394                         unsigned int bits;
 395
 396                         bits = hweight8(buf[i] ^ pattern[mod]);
 397                         log_err("fio: got pattern '%02x', wanted '%02x'. Bad bits %d\n",
 398                                 (unsigned char)buf[i],
 399                                 (unsigned char)pattern[mod],
 400                                 bits);
 401                         log_err("fio: bad pattern block offset %u\n", i);
 402                         vc->name = "pattern";
 403                         log_verify_failure(hdr, vc);
 404                         return EILSEQ;
 405                 }
 406                 mod++;
 407                 if (mod == td->o.verify_pattern_bytes)
 408                         mod = 0;
 409         }
 410
 411         /* Unreachable line */
 412         assert(0);
 413         return EILSEQ;
 414 }
 415
 416 static int verify_io_u_xxhash(struct verify_header *hdr, struct vcont *vc)
 417 {
 418         void *p = io_u_verify_off(hdr, vc);
 419         struct vhdr_xxhash *vh = hdr_priv(hdr);
 420         uint32_t hash;
 421         void *state;
 422
 423         dprint(FD_VERIFY, "xxhash verify io_u %p, len %u\n", vc->io_u, hdr->len);
 424
 425         state = XXH32_init(1);
 426         XXH32_update(state, p, hdr->len - hdr_size(vc->td, hdr));
 427         hash = XXH32_digest(state);
 428
 429         if (vh->hash == hash)
 430                 return 0;
 431
 432         vc->name = "xxhash";
 433         vc->good_crc = &vh->hash;
 434         vc->bad_crc = &hash;
 435         vc->crc_len = sizeof(hash);
 436         log_verify_failure(hdr, vc);
 437         return EILSEQ;
 438 }
 439
 440 static int verify_io_u_sha3(struct verify_header *hdr, struct vcont *vc,
 441                             struct fio_sha3_ctx *sha3_ctx, uint8_t *sha,
 442                             unsigned int sha_size, const char *name)
 443 {
 444         void *p = io_u_verify_off(hdr, vc);
 445
 446         dprint(FD_VERIFY, "%s verify io_u %p, len %u\n", name, vc->io_u, hdr->len);
 447
 448         fio_sha3_update(sha3_ctx, p, hdr->len - hdr_size(vc->td, hdr));
 449         fio_sha3_final(sha3_ctx);
 450
 451         if (!memcmp(sha, sha3_ctx->sha, sha_size))
 452                 return 0;
 453
 454         vc->name = name;
 455         vc->good_crc = sha;
 456         vc->bad_crc = sha3_ctx->sha;
 457         vc->crc_len = sha_size;
 458         log_verify_failure(hdr, vc);
 459         return EILSEQ;
 460 }
 461
 462 static int verify_io_u_sha3_224(struct verify_header *hdr, struct vcont *vc)
 463 {
 464         struct vhdr_sha3_224 *vh = hdr_priv(hdr);
 465         uint8_t sha[SHA3_224_DIGEST_SIZE];
 466         struct fio_sha3_ctx sha3_ctx = {
 467                 .sha = sha,
 468         };
 469
 470         fio_sha3_224_init(&sha3_ctx);
 471
 472         return verify_io_u_sha3(hdr, vc, &sha3_ctx, vh->sha,
 473                                 SHA3_224_DIGEST_SIZE, "sha3-224");
 474 }
 475
 476 static int verify_io_u_sha3_256(struct verify_header *hdr, struct vcont *vc)
 477 {
 478         struct vhdr_sha3_256 *vh = hdr_priv(hdr);
 479         uint8_t sha[SHA3_256_DIGEST_SIZE];
 480         struct fio_sha3_ctx sha3_ctx = {
 481                 .sha = sha,
 482         };
 483
 484         fio_sha3_256_init(&sha3_ctx);
 485
 486         return verify_io_u_sha3(hdr, vc, &sha3_ctx, vh->sha,
 487                                 SHA3_256_DIGEST_SIZE, "sha3-256");
 488 }
 489
 490 static int verify_io_u_sha3_384(struct verify_header *hdr, struct vcont *vc)
 491 {
 492         struct vhdr_sha3_384 *vh = hdr_priv(hdr);
 493         uint8_t sha[SHA3_384_DIGEST_SIZE];
 494         struct fio_sha3_ctx sha3_ctx = {
 495                 .sha = sha,
 496         };
 497
 498         fio_sha3_384_init(&sha3_ctx);
 499
 500         return verify_io_u_sha3(hdr, vc, &sha3_ctx, vh->sha,
 501                                 SHA3_384_DIGEST_SIZE, "sha3-384");
 502 }
 503
 504 static int verify_io_u_sha3_512(struct verify_header *hdr, struct vcont *vc)
 505 {
 506         struct vhdr_sha3_512 *vh = hdr_priv(hdr);
 507         uint8_t sha[SHA3_512_DIGEST_SIZE];
 508         struct fio_sha3_ctx sha3_ctx = {
 509                 .sha = sha,
 510         };
 511
 512         fio_sha3_512_init(&sha3_ctx);
 513
 514         return verify_io_u_sha3(hdr, vc, &sha3_ctx, vh->sha,
 515                                 SHA3_512_DIGEST_SIZE, "sha3-512");
 516 }
 517
 518 static int verify_io_u_sha512(struct verify_header *hdr, struct vcont *vc)
 519 {
 520         void *p = io_u_verify_off(hdr, vc);
 521         struct vhdr_sha512 *vh = hdr_priv(hdr);
 522         uint8_t sha512[128];
 523         struct fio_sha512_ctx sha512_ctx = {
 524                 .buf = sha512,
 525         };
 526
 527         dprint(FD_VERIFY, "sha512 verify io_u %p, len %u\n", vc->io_u, hdr->len);
 528
 529         fio_sha512_init(&sha512_ctx);
 530         fio_sha512_update(&sha512_ctx, p, hdr->len - hdr_size(vc->td, hdr));
 531
 532         if (!memcmp(vh->sha512, sha512_ctx.buf, sizeof(sha512)))
 533                 return 0;
 534
 535         vc->name = "sha512";
 536         vc->good_crc = vh->sha512;
 537         vc->bad_crc = sha512_ctx.buf;
 538         vc->crc_len = sizeof(vh->sha512);
 539         log_verify_failure(hdr, vc);
 540         return EILSEQ;
 541 }
 542
 543 static int verify_io_u_sha256(struct verify_header *hdr, struct vcont *vc)
 544 {
 545         void *p = io_u_verify_off(hdr, vc);
 546         struct vhdr_sha256 *vh = hdr_priv(hdr);
 547         uint8_t sha256[64];
 548         struct fio_sha256_ctx sha256_ctx = {
 549                 .buf = sha256,
 550         };
 551
 552         dprint(FD_VERIFY, "sha256 verify io_u %p, len %u\n", vc->io_u, hdr->len);
 553
 554         fio_sha256_init(&sha256_ctx);
 555         fio_sha256_update(&sha256_ctx, p, hdr->len - hdr_size(vc->td, hdr));
 556         fio_sha256_final(&sha256_ctx);
 557
 558         if (!memcmp(vh->sha256, sha256_ctx.buf, sizeof(sha256)))
 559                 return 0;
 560
 561         vc->name = "sha256";
 562         vc->good_crc = vh->sha256;
 563         vc->bad_crc = sha256_ctx.buf;
 564         vc->crc_len = sizeof(vh->sha256);
 565         log_verify_failure(hdr, vc);
 566         return EILSEQ;
 567 }
 568
 569 static int verify_io_u_sha1(struct verify_header *hdr, struct vcont *vc)
 570 {
 571         void *p = io_u_verify_off(hdr, vc);
 572         struct vhdr_sha1 *vh = hdr_priv(hdr);
 573         uint32_t sha1[5];
 574         struct fio_sha1_ctx sha1_ctx = {
 575                 .H = sha1,
 576         };
 577
 578         dprint(FD_VERIFY, "sha1 verify io_u %p, len %u\n", vc->io_u, hdr->len);
 579
 580         fio_sha1_init(&sha1_ctx);
 581         fio_sha1_update(&sha1_ctx, p, hdr->len - hdr_size(vc->td, hdr));
 582         fio_sha1_final(&sha1_ctx);
 583
 584         if (!memcmp(vh->sha1, sha1_ctx.H, sizeof(sha1)))
 585                 return 0;
 586
 587         vc->name = "sha1";
 588         vc->good_crc = vh->sha1;
 589         vc->bad_crc = sha1_ctx.H;
 590         vc->crc_len = sizeof(vh->sha1);
 591         log_verify_failure(hdr, vc);
 592         return EILSEQ;
 593 }
 594
 595 static int verify_io_u_crc7(struct verify_header *hdr, struct vcont *vc)
 596 {
 597         void *p = io_u_verify_off(hdr, vc);
 598         struct vhdr_crc7 *vh = hdr_priv(hdr);
 599         unsigned char c;
 600
 601         dprint(FD_VERIFY, "crc7 verify io_u %p, len %u\n", vc->io_u, hdr->len);
 602
 603         c = fio_crc7(p, hdr->len - hdr_size(vc->td, hdr));
 604
 605         if (c == vh->crc7)
 606                 return 0;
 607
 608         vc->name = "crc7";
 609         vc->good_crc = &vh->crc7;
 610         vc->bad_crc = &c;
 611         vc->crc_len = 1;
 612         log_verify_failure(hdr, vc);
 613         return EILSEQ;
 614 }
 615
 616 static int verify_io_u_crc16(struct verify_header *hdr, struct vcont *vc)
 617 {
 618         void *p = io_u_verify_off(hdr, vc);
 619         struct vhdr_crc16 *vh = hdr_priv(hdr);
 620         unsigned short c;
 621
 622         dprint(FD_VERIFY, "crc16 verify io_u %p, len %u\n", vc->io_u, hdr->len);
 623
 624         c = fio_crc16(p, hdr->len - hdr_size(vc->td, hdr));
 625
 626         if (c == vh->crc16)
 627                 return 0;
 628
 629         vc->name = "crc16";
 630         vc->good_crc = &vh->crc16;
 631         vc->bad_crc = &c;
 632         vc->crc_len = 2;
 633         log_verify_failure(hdr, vc);
 634         return EILSEQ;
 635 }
 636
 637 static int verify_io_u_crc64(struct verify_header *hdr, struct vcont *vc)
 638 {
 639         void *p = io_u_verify_off(hdr, vc);
 640         struct vhdr_crc64 *vh = hdr_priv(hdr);
 641         unsigned long long c;
 642
 643         dprint(FD_VERIFY, "crc64 verify io_u %p, len %u\n", vc->io_u, hdr->len);
 644
 645         c = fio_crc64(p, hdr->len - hdr_size(vc->td, hdr));
 646
 647         if (c == vh->crc64)
 648                 return 0;
 649
 650         vc->name = "crc64";
 651         vc->good_crc = &vh->crc64;
 652         vc->bad_crc = &c;
 653         vc->crc_len = 8;
 654         log_verify_failure(hdr, vc);
 655         return EILSEQ;
 656 }
 657
 658 static int verify_io_u_crc32(struct verify_header *hdr, struct vcont *vc)
 659 {
 660         void *p = io_u_verify_off(hdr, vc);
 661         struct vhdr_crc32 *vh = hdr_priv(hdr);
 662         uint32_t c;
 663
 664         dprint(FD_VERIFY, "crc32 verify io_u %p, len %u\n", vc->io_u, hdr->len);
 665
 666         c = fio_crc32(p, hdr->len - hdr_size(vc->td, hdr));
 667
 668         if (c == vh->crc32)
 669                 return 0;
 670
 671         vc->name = "crc32";
 672         vc->good_crc = &vh->crc32;
 673         vc->bad_crc = &c;
 674         vc->crc_len = 4;
 675         log_verify_failure(hdr, vc);
 676         return EILSEQ;
 677 }
 678
 679 static int verify_io_u_crc32c(struct verify_header *hdr, struct vcont *vc)
 680 {
 681         void *p = io_u_verify_off(hdr, vc);
 682         struct vhdr_crc32 *vh = hdr_priv(hdr);
 683         uint32_t c;
 684
 685         dprint(FD_VERIFY, "crc32c verify io_u %p, len %u\n", vc->io_u, hdr->len);
 686
 687         c = fio_crc32c(p, hdr->len - hdr_size(vc->td, hdr));
 688
 689         if (c == vh->crc32)
 690                 return 0;
 691
 692         vc->name = "crc32c";
 693         vc->good_crc = &vh->crc32;
 694         vc->bad_crc = &c;
 695         vc->crc_len = 4;
 696         log_verify_failure(hdr, vc);
 697         return EILSEQ;
 698 }
 699
 700 static int verify_io_u_md5(struct verify_header *hdr, struct vcont *vc)
 701 {
 702         void *p = io_u_verify_off(hdr, vc);
 703         struct vhdr_md5 *vh = hdr_priv(hdr);
 704         uint32_t hash[MD5_HASH_WORDS];
 705         struct fio_md5_ctx md5_ctx = {
 706                 .hash = hash,
 707         };
 708
 709         dprint(FD_VERIFY, "md5 verify io_u %p, len %u\n", vc->io_u, hdr->len);
 710
 711         fio_md5_init(&md5_ctx);
 712         fio_md5_update(&md5_ctx, p, hdr->len - hdr_size(vc->td, hdr));
 713         fio_md5_final(&md5_ctx);
 714
 715         if (!memcmp(vh->md5_digest, md5_ctx.hash, sizeof(hash)))
 716                 return 0;
 717
 718         vc->name = "md5";
 719         vc->good_crc = vh->md5_digest;
 720         vc->bad_crc = md5_ctx.hash;
 721         vc->crc_len = sizeof(hash);
 722         log_verify_failure(hdr, vc);
 723         return EILSEQ;
 724 }
 725
 726 /*
 727  * Push IO verification to a separate thread
 728  */
 729 int verify_io_u_async(struct thread_data *td, struct io_u **io_u_ptr)
 730 {
 731         struct io_u *io_u = *io_u_ptr;
 732
 733         pthread_mutex_lock(&td->io_u_lock);
 734
 735         if (io_u->file)
 736                 put_file_log(td, io_u->file);
 737
 738         if (io_u->flags & IO_U_F_IN_CUR_DEPTH) {
 739                 td->cur_depth--;
 740                 io_u_clear(td, io_u, IO_U_F_IN_CUR_DEPTH);
 741         }
 742         flist_add_tail(&io_u->verify_list, &td->verify_list);
 743         *io_u_ptr = NULL;
 744
 745         pthread_cond_signal(&td->verify_cond);
 746         pthread_mutex_unlock(&td->io_u_lock);
 747         return 0;
 748 }
 749
 750 /*
 751  * Thanks Rusty, for spending the time so I don't have to.
 752  *
 753  * http://rusty.ozlabs.org/?p=560
 754  */
 755 static int mem_is_zero(const void *data, size_t length)
 756 {
 757         const unsigned char *p = data;
 758         size_t len;
 759
 760         /* Check first 16 bytes manually */
 761         for (len = 0; len < 16; len++) {
 762                 if (!length)
 763                         return 1;
 764                 if (*p)
 765                         return 0;
 766                 p++;
 767                 length--;
 768         }
 769
 770         /* Now we know that's zero, memcmp with self. */
 771         return memcmp(data, p, length) == 0;
 772 }
 773
 774 static int mem_is_zero_slow(const void *data, size_t length, size_t *offset)
 775 {
 776         const unsigned char *p = data;
 777
 778         *offset = 0;
 779         while (length) {
 780                 if (*p)
 781                         break;
 782                 (*offset)++;
 783                 length--;
 784                 p++;
 785         }
 786
 787         return !length;
 788 }
 789
 790 static int verify_trimmed_io_u(struct thread_data *td, struct io_u *io_u)
 791 {
 792         size_t offset;
 793
 794         if (!td->o.trim_zero)
 795                 return 0;
 796
 797         if (mem_is_zero(io_u->buf, io_u->buflen))
 798                 return 0;
 799
 800         mem_is_zero_slow(io_u->buf, io_u->buflen, &offset);
 801
 802         log_err("trim: verify failed at file %s offset %llu, length %llu"
 803                 ", block offset %lu\n",
 804                         io_u->file->file_name, io_u->verify_offset, io_u->buflen,
 805                         (unsigned long) offset);
 806         return EILSEQ;
 807 }
 808
 809 static int verify_header(struct io_u *io_u, struct thread_data *td,
 810                          struct verify_header *hdr, unsigned int hdr_num,
 811                          unsigned int hdr_len)
 812 {
 813         void *p = hdr;
 814         uint32_t crc;
 815
 816         if (hdr->magic != FIO_HDR_MAGIC) {
 817                 log_err("verify: bad magic header %x, wanted %x",
 818                         hdr->magic, FIO_HDR_MAGIC);
 819                 goto err;
 820         }
 821         if (hdr->len != hdr_len) {
 822                 log_err("verify: bad header length %u, wanted %u",
 823                         hdr->len, hdr_len);
 824                 goto err;
 825         }
 826         if (hdr->rand_seed != io_u->rand_seed) {
 827                 log_err("verify: bad header rand_seed %"PRIu64
 828                         ", wanted %"PRIu64,
 829                         hdr->rand_seed, io_u->rand_seed);
 830                 goto err;
 831         }
 832         if (hdr->offset != io_u->verify_offset + hdr_num * td->o.verify_interval) {
 833                 log_err("verify: bad header offset %"PRIu64
 834                         ", wanted %llu",
 835                         hdr->offset, io_u->verify_offset);
 836                 goto err;
 837         }
 838
 839         /*
 840          * For read-only workloads, the program cannot be certain of the
 841          * last numberio written to a block. Checking of numberio will be
 842          * done only for workloads that write data.  For verify_only,
 843          * numberio check is skipped.
 844          */
 845         if (td_write(td) && (td_min_bs(td) == td_max_bs(td)) &&
 846             !td->o.time_based)
 847                 if (!td->o.verify_only)
 848                         if (hdr->numberio != io_u->numberio) {
 849                                 log_err("verify: bad header numberio %"PRIu16
 850                                         ", wanted %"PRIu16,
 851                                         hdr->numberio, io_u->numberio);
 852                                 goto err;
 853                         }
 854
 855         crc = fio_crc32c(p, offsetof(struct verify_header, crc32));
 856         if (crc != hdr->crc32) {
 857                 log_err("verify: bad header crc %x, calculated %x",
 858                         hdr->crc32, crc);
 859                 goto err;
 860         }
 861         return 0;
 862
 863 err:
 864         log_err(" at file %s offset %llu, length %u"
 865                 " (requested block: offset=%llu, length=%llu)\n",
 866                 io_u->file->file_name,
 867                 io_u->verify_offset + hdr_num * hdr_len, hdr_len,
 868                 io_u->verify_offset, io_u->buflen);
 869
 870         if (td->o.verify_dump)
 871                 dump_buf(p, hdr_len, io_u->verify_offset + hdr_num * hdr_len,
 872                                 "hdr_fail", io_u->file);
 873
 874         return EILSEQ;
 875 }
 876
 877 int verify_io_u(struct thread_data *td, struct io_u **io_u_ptr)
 878 {
 879         struct verify_header *hdr;
 880         struct io_u *io_u = *io_u_ptr;
 881         unsigned int header_size, hdr_inc, hdr_num = 0;
 882         void *p;
 883         int ret;
 884
 885         if (td->o.verify == VERIFY_NULL || io_u->ddir != DDIR_READ)
 886                 return 0;
 887         /*
 888          * If the IO engine is faking IO (like null), then just pretend
 889          * we verified everything.
 890          */
 891         if (td_ioengine_flagged(td, FIO_FAKEIO))
 892                 return 0;
 893
 894         if (io_u->flags & IO_U_F_TRIMMED) {
 895                 ret = verify_trimmed_io_u(td, io_u);
 896                 goto done;
 897         }
 898
 899         hdr_inc = get_hdr_inc(td, io_u);
 900
 901         ret = 0;
 902         for (p = io_u->buf; p < io_u->buf + io_u->buflen;
 903              p += hdr_inc, hdr_num++) {
 904                 struct vcont vc = {
 905                         .io_u           = io_u,
 906                         .hdr_num        = hdr_num,
 907                         .td             = td,
 908                 };
 909                 unsigned int verify_type;
 910
 911                 if (ret && td->o.verify_fatal)
 912                         break;
 913
 914                 header_size = __hdr_size(td->o.verify);
 915                 if (td->o.verify_offset)
 916                         memswp(p, p + td->o.verify_offset, header_size);
 917                 hdr = p;
 918
 919                 /*
 920                  * Make rand_seed check pass when have verify_backlog.
 921                  */
 922                 if (!td_rw(td) || (td->flags & TD_F_VER_BACKLOG))
 923                         io_u->rand_seed = hdr->rand_seed;
 924
 925                 if (td->o.verify != VERIFY_PATTERN_NO_HDR) {
 926                         ret = verify_header(io_u, td, hdr, hdr_num, hdr_inc);
 927                         if (ret)
 928                                 return ret;
 929                 }
 930
 931                 if (td->o.verify != VERIFY_NONE)
 932                         verify_type = td->o.verify;
 933                 else
 934                         verify_type = hdr->verify_type;
 935
 936                 switch (verify_type) {
 937                 case VERIFY_HDR_ONLY:
 938                         /* Header is always verified, check if pattern is left
 939                          * for verification. */
 940                         if (td->o.verify_pattern_bytes)
 941                                 ret = verify_io_u_pattern(hdr, &vc);
 942                         break;
 943                 case VERIFY_MD5:
 944                         ret = verify_io_u_md5(hdr, &vc);
 945                         break;
 946                 case VERIFY_CRC64:
 947                         ret = verify_io_u_crc64(hdr, &vc);
 948                         break;
 949                 case VERIFY_CRC32C:
 950                 case VERIFY_CRC32C_INTEL:
 951                         ret = verify_io_u_crc32c(hdr, &vc);
 952                         break;
 953                 case VERIFY_CRC32:
 954                         ret = verify_io_u_crc32(hdr, &vc);
 955                         break;
 956                 case VERIFY_CRC16:
 957                         ret = verify_io_u_crc16(hdr, &vc);
 958                         break;
 959                 case VERIFY_CRC7:
 960                         ret = verify_io_u_crc7(hdr, &vc);
 961                         break;
 962                 case VERIFY_SHA256:
 963                         ret = verify_io_u_sha256(hdr, &vc);
 964                         break;
 965                 case VERIFY_SHA512:
 966                         ret = verify_io_u_sha512(hdr, &vc);
 967                         break;
 968                 case VERIFY_SHA3_224:
 969                         ret = verify_io_u_sha3_224(hdr, &vc);
 970                         break;
 971                 case VERIFY_SHA3_256:
 972                         ret = verify_io_u_sha3_256(hdr, &vc);
 973                         break;
 974                 case VERIFY_SHA3_384:
 975                         ret = verify_io_u_sha3_384(hdr, &vc);
 976                         break;
 977                 case VERIFY_SHA3_512:
 978                         ret = verify_io_u_sha3_512(hdr, &vc);
 979                         break;
 980                 case VERIFY_XXHASH:
 981                         ret = verify_io_u_xxhash(hdr, &vc);
 982                         break;
 983                 case VERIFY_SHA1:
 984                         ret = verify_io_u_sha1(hdr, &vc);
 985                         break;
 986                 case VERIFY_PATTERN:
 987                 case VERIFY_PATTERN_NO_HDR:
 988                         ret = verify_io_u_pattern(hdr, &vc);
 989                         break;
 990                 default:
 991                         log_err("Bad verify type %u\n", hdr->verify_type);
 992                         ret = EINVAL;
 993                 }
 994
 995                 if (ret && verify_type != hdr->verify_type)
 996                         log_err("fio: verify type mismatch (%u media, %u given)\n",
 997                                         hdr->verify_type, verify_type);
 998         }
 999
1000 done:
1001         if (ret && td->o.verify_fatal)
1002                 fio_mark_td_terminate(td);
1003
1004         return ret;
1005 }
1006
1007 static void fill_xxhash(struct verify_header *hdr, void *p, unsigned int len)
1008 {
1009         struct vhdr_xxhash *vh = hdr_priv(hdr);
1010         void *state;
1011
1012         state = XXH32_init(1);
1013         XXH32_update(state, p, len);
1014         vh->hash = XXH32_digest(state);
1015 }
1016
1017 static void fill_sha3(struct fio_sha3_ctx *sha3_ctx, void *p, unsigned int len)
1018 {
1019         fio_sha3_update(sha3_ctx, p, len);
1020         fio_sha3_final(sha3_ctx);
1021 }
1022
1023 static void fill_sha3_224(struct verify_header *hdr, void *p, unsigned int len)
1024 {
1025         struct vhdr_sha3_224 *vh = hdr_priv(hdr);
1026         struct fio_sha3_ctx sha3_ctx = {
1027                 .sha = vh->sha,
1028         };
1029
1030         fio_sha3_224_init(&sha3_ctx);
1031         fill_sha3(&sha3_ctx, p, len);
1032 }
1033
1034 static void fill_sha3_256(struct verify_header *hdr, void *p, unsigned int len)
1035 {
1036         struct vhdr_sha3_256 *vh = hdr_priv(hdr);
1037         struct fio_sha3_ctx sha3_ctx = {
1038                 .sha = vh->sha,
1039         };
1040
1041         fio_sha3_256_init(&sha3_ctx);
1042         fill_sha3(&sha3_ctx, p, len);
1043 }
1044
1045 static void fill_sha3_384(struct verify_header *hdr, void *p, unsigned int len)
1046 {
1047         struct vhdr_sha3_384 *vh = hdr_priv(hdr);
1048         struct fio_sha3_ctx sha3_ctx = {
1049                 .sha = vh->sha,
1050         };
1051
1052         fio_sha3_384_init(&sha3_ctx);
1053         fill_sha3(&sha3_ctx, p, len);
1054 }
1055
1056 static void fill_sha3_512(struct verify_header *hdr, void *p, unsigned int len)
1057 {
1058         struct vhdr_sha3_512 *vh = hdr_priv(hdr);
1059         struct fio_sha3_ctx sha3_ctx = {
1060                 .sha = vh->sha,
1061         };
1062
1063         fio_sha3_512_init(&sha3_ctx);
1064         fill_sha3(&sha3_ctx, p, len);
1065 }
1066
1067 static void fill_sha512(struct verify_header *hdr, void *p, unsigned int len)
1068 {
1069         struct vhdr_sha512 *vh = hdr_priv(hdr);
1070         struct fio_sha512_ctx sha512_ctx = {
1071                 .buf = vh->sha512,
1072         };
1073
1074         fio_sha512_init(&sha512_ctx);
1075         fio_sha512_update(&sha512_ctx, p, len);
1076 }
1077
1078 static void fill_sha256(struct verify_header *hdr, void *p, unsigned int len)
1079 {
1080         struct vhdr_sha256 *vh = hdr_priv(hdr);
1081         struct fio_sha256_ctx sha256_ctx = {
1082                 .buf = vh->sha256,
1083         };
1084
1085         fio_sha256_init(&sha256_ctx);
1086         fio_sha256_update(&sha256_ctx, p, len);
1087         fio_sha256_final(&sha256_ctx);
1088 }
1089
1090 static void fill_sha1(struct verify_header *hdr, void *p, unsigned int len)
1091 {
1092         struct vhdr_sha1 *vh = hdr_priv(hdr);
1093         struct fio_sha1_ctx sha1_ctx = {
1094                 .H = vh->sha1,
1095         };
1096
1097         fio_sha1_init(&sha1_ctx);
1098         fio_sha1_update(&sha1_ctx, p, len);
1099         fio_sha1_final(&sha1_ctx);
1100 }
1101
1102 static void fill_crc7(struct verify_header *hdr, void *p, unsigned int len)
1103 {
1104         struct vhdr_crc7 *vh = hdr_priv(hdr);
1105
1106         vh->crc7 = fio_crc7(p, len);
1107 }
1108
1109 static void fill_crc16(struct verify_header *hdr, void *p, unsigned int len)
1110 {
1111         struct vhdr_crc16 *vh = hdr_priv(hdr);
1112
1113         vh->crc16 = fio_crc16(p, len);
1114 }
1115
1116 static void fill_crc32(struct verify_header *hdr, void *p, unsigned int len)
1117 {
1118         struct vhdr_crc32 *vh = hdr_priv(hdr);
1119
1120         vh->crc32 = fio_crc32(p, len);
1121 }
1122
1123 static void fill_crc32c(struct verify_header *hdr, void *p, unsigned int len)
1124 {
1125         struct vhdr_crc32 *vh = hdr_priv(hdr);
1126
1127         vh->crc32 = fio_crc32c(p, len);
1128 }
1129
1130 static void fill_crc64(struct verify_header *hdr, void *p, unsigned int len)
1131 {
1132         struct vhdr_crc64 *vh = hdr_priv(hdr);
1133
1134         vh->crc64 = fio_crc64(p, len);
1135 }
1136
1137 static void fill_md5(struct verify_header *hdr, void *p, unsigned int len)
1138 {
1139         struct vhdr_md5 *vh = hdr_priv(hdr);
1140         struct fio_md5_ctx md5_ctx = {
1141                 .hash = (uint32_t *) vh->md5_digest,
1142         };
1143
1144         fio_md5_init(&md5_ctx);
1145         fio_md5_update(&md5_ctx, p, len);
1146         fio_md5_final(&md5_ctx);
1147 }
1148
1149 static void __fill_hdr(struct thread_data *td, struct io_u *io_u,
1150                        struct verify_header *hdr, unsigned int header_num,
1151                        unsigned int header_len, uint64_t rand_seed)
1152 {
1153         void *p = hdr;
1154
1155         hdr->magic = FIO_HDR_MAGIC;
1156         hdr->verify_type = td->o.verify;
1157         hdr->len = header_len;
1158         hdr->rand_seed = rand_seed;
1159         hdr->offset = io_u->verify_offset + header_num * td->o.verify_interval;
1160         hdr->time_sec = io_u->start_time.tv_sec;
1161         hdr->time_nsec = io_u->start_time.tv_nsec;
1162         hdr->thread = td->thread_number;
1163         hdr->numberio = io_u->numberio;
1164         hdr->crc32 = fio_crc32c(p, offsetof(struct verify_header, crc32));
1165 }
1166
1167
1168 static void fill_hdr(struct thread_data *td, struct io_u *io_u,
1169                      struct verify_header *hdr, unsigned int header_num,
1170                      unsigned int header_len, uint64_t rand_seed)
1171 {
1172         if (td->o.verify != VERIFY_PATTERN_NO_HDR)
1173                 __fill_hdr(td, io_u, hdr, header_num, header_len, rand_seed);
1174 }
1175
1176 static void populate_hdr(struct thread_data *td, struct io_u *io_u,
1177                          struct verify_header *hdr, unsigned int header_num,
1178                          unsigned int header_len)
1179 {
1180         unsigned int data_len;
1181         void *data;
1182         char *p;
1183
1184         p = (char *) hdr;
1185
1186         fill_hdr(td, io_u, hdr, header_num, header_len, io_u->rand_seed);
1187
1188         if (header_len <= hdr_size(td, hdr)) {
1189                 td_verror(td, EINVAL, "Blocksize too small");
1190                 return;
1191         }
1192         data_len = header_len - hdr_size(td, hdr);
1193
1194         data = p + hdr_size(td, hdr);
1195         switch (td->o.verify) {
1196         case VERIFY_MD5:
1197                 dprint(FD_VERIFY, "fill md5 io_u %p, len %u\n",
1198                                                 io_u, hdr->len);
1199                 fill_md5(hdr, data, data_len);
1200                 break;
1201         case VERIFY_CRC64:
1202                 dprint(FD_VERIFY, "fill crc64 io_u %p, len %u\n",
1203                                                 io_u, hdr->len);
1204                 fill_crc64(hdr, data, data_len);
1205                 break;
1206         case VERIFY_CRC32C:
1207         case VERIFY_CRC32C_INTEL:
1208                 dprint(FD_VERIFY, "fill crc32c io_u %p, len %u\n",
1209                                                 io_u, hdr->len);
1210                 fill_crc32c(hdr, data, data_len);
1211                 break;
1212         case VERIFY_CRC32:
1213                 dprint(FD_VERIFY, "fill crc32 io_u %p, len %u\n",
1214                                                 io_u, hdr->len);
1215                 fill_crc32(hdr, data, data_len);
1216                 break;
1217         case VERIFY_CRC16:
1218                 dprint(FD_VERIFY, "fill crc16 io_u %p, len %u\n",
1219                                                 io_u, hdr->len);
1220                 fill_crc16(hdr, data, data_len);
1221                 break;
1222         case VERIFY_CRC7:
1223                 dprint(FD_VERIFY, "fill crc7 io_u %p, len %u\n",
1224                                                 io_u, hdr->len);
1225                 fill_crc7(hdr, data, data_len);
1226                 break;
1227         case VERIFY_SHA256:
1228                 dprint(FD_VERIFY, "fill sha256 io_u %p, len %u\n",
1229                                                 io_u, hdr->len);
1230                 fill_sha256(hdr, data, data_len);
1231                 break;
1232         case VERIFY_SHA512:
1233                 dprint(FD_VERIFY, "fill sha512 io_u %p, len %u\n",
1234                                                 io_u, hdr->len);
1235                 fill_sha512(hdr, data, data_len);
1236                 break;
1237         case VERIFY_SHA3_224:
1238                 dprint(FD_VERIFY, "fill sha3-224 io_u %p, len %u\n",
1239                                                 io_u, hdr->len);
1240                 fill_sha3_224(hdr, data, data_len);
1241                 break;
1242         case VERIFY_SHA3_256:
1243                 dprint(FD_VERIFY, "fill sha3-256 io_u %p, len %u\n",
1244                                                 io_u, hdr->len);
1245                 fill_sha3_256(hdr, data, data_len);
1246                 break;
1247         case VERIFY_SHA3_384:
1248                 dprint(FD_VERIFY, "fill sha3-384 io_u %p, len %u\n",
1249                                                 io_u, hdr->len);
1250                 fill_sha3_384(hdr, data, data_len);
1251                 break;
1252         case VERIFY_SHA3_512:
1253                 dprint(FD_VERIFY, "fill sha3-512 io_u %p, len %u\n",
1254                                                 io_u, hdr->len);
1255                 fill_sha3_512(hdr, data, data_len);
1256                 break;
1257         case VERIFY_XXHASH:
1258                 dprint(FD_VERIFY, "fill xxhash io_u %p, len %u\n",
1259                                                 io_u, hdr->len);
1260                 fill_xxhash(hdr, data, data_len);
1261                 break;
1262         case VERIFY_SHA1:
1263                 dprint(FD_VERIFY, "fill sha1 io_u %p, len %u\n",
1264                                                 io_u, hdr->len);
1265                 fill_sha1(hdr, data, data_len);
1266                 break;
1267         case VERIFY_HDR_ONLY:
1268         case VERIFY_PATTERN:
1269         case VERIFY_PATTERN_NO_HDR:
1270                 /* nothing to do here */
1271                 break;
1272         default:
1273                 log_err("fio: bad verify type: %d\n", td->o.verify);
1274                 assert(0);
1275         }
1276
1277         if (td->o.verify_offset && hdr_size(td, hdr))
1278                 memswp(p, p + td->o.verify_offset, hdr_size(td, hdr));
1279 }
1280
1281 /*
1282  * fill body of io_u->buf with random data and add a header with the
1283  * checksum of choice
1284  */
1285 void populate_verify_io_u(struct thread_data *td, struct io_u *io_u)
1286 {
1287         if (td->o.verify == VERIFY_NULL)
1288                 return;
1289
1290         io_u->numberio = td->io_issues[io_u->ddir];
1291
1292         fill_pattern_headers(td, io_u, 0, 0);
1293 }
1294
1295 int get_next_verify(struct thread_data *td, struct io_u *io_u)
1296 {
1297         struct io_piece *ipo = NULL;
1298
1299         /*
1300          * this io_u is from a requeue, we already filled the offsets
1301          */
1302         if (io_u->file)
1303                 return 0;
1304
1305         if (!RB_EMPTY_ROOT(&td->io_hist_tree)) {
1306                 struct fio_rb_node *n = rb_first(&td->io_hist_tree);
1307
1308                 ipo = rb_entry(n, struct io_piece, rb_node);
1309
1310                 /*
1311                  * Ensure that the associated IO has completed
1312                  */
1313                 if (atomic_load_acquire(&ipo->flags) & IP_F_IN_FLIGHT)
1314                         goto nothing;
1315
1316                 rb_erase(n, &td->io_hist_tree);
1317                 assert(ipo->flags & IP_F_ONRB);
1318                 ipo->flags &= ~IP_F_ONRB;
1319         } else if (!flist_empty(&td->io_hist_list)) {
1320                 ipo = flist_first_entry(&td->io_hist_list, struct io_piece, list);
1321
1322                 /*
1323                  * Ensure that the associated IO has completed
1324                  */
1325                 if (atomic_load_acquire(&ipo->flags) & IP_F_IN_FLIGHT)
1326                         goto nothing;
1327
1328                 flist_del(&ipo->list);
1329                 assert(ipo->flags & IP_F_ONLIST);
1330                 ipo->flags &= ~IP_F_ONLIST;
1331         }
1332
1333         if (ipo) {
1334                 td->io_hist_len--;
1335
1336                 io_u->offset = ipo->offset;
1337                 io_u->verify_offset = ipo->offset;
1338                 io_u->buflen = ipo->len;
1339                 io_u->numberio = ipo->numberio;
1340                 io_u->file = ipo->file;
1341                 io_u_set(td, io_u, IO_U_F_VER_LIST);
1342
1343                 if (ipo->flags & IP_F_TRIMMED)
1344                         io_u_set(td, io_u, IO_U_F_TRIMMED);
1345
1346                 if (!fio_file_open(io_u->file)) {
1347                         int r = td_io_open_file(td, io_u->file);
1348
1349                         if (r) {
1350                                 dprint(FD_VERIFY, "failed file %s open\n",
1351                                                 io_u->file->file_name);
1352                                 return 1;
1353                         }
1354                 }
1355
1356                 get_file(ipo->file);
1357                 assert(fio_file_open(io_u->file));
1358                 io_u->ddir = DDIR_READ;
1359                 io_u->xfer_buf = io_u->buf;
1360                 io_u->xfer_buflen = io_u->buflen;
1361
1362                 remove_trim_entry(td, ipo);
1363                 free(ipo);
1364                 dprint(FD_VERIFY, "get_next_verify: ret io_u %p\n", io_u);
1365
1366                 if (!td->o.verify_pattern_bytes) {
1367                         io_u->rand_seed = __rand(&td->verify_state);
1368                         if (sizeof(int) != sizeof(long *))
1369                                 io_u->rand_seed *= __rand(&td->verify_state);
1370                 }
1371                 return 0;
1372         }
1373
1374 nothing:
1375         dprint(FD_VERIFY, "get_next_verify: empty\n");
1376         return 1;
1377 }
1378
1379 void fio_verify_init(struct thread_data *td)
1380 {
1381         if (td->o.verify == VERIFY_CRC32C_INTEL ||
1382             td->o.verify == VERIFY_CRC32C) {
1383                 crc32c_arm64_probe();
1384                 crc32c_intel_probe();
1385         }
1386 }
1387
1388 static void *verify_async_thread(void *data)
1389 {
1390         struct thread_data *td = data;
1391         struct io_u *io_u;
1392         int ret = 0;
1393
1394         if (fio_option_is_set(&td->o, verify_cpumask) &&
1395             fio_setaffinity(td->pid, td->o.verify_cpumask)) {
1396                 log_err("fio: failed setting verify thread affinity\n");
1397                 goto done;
1398         }
1399
1400         do {
1401                 FLIST_HEAD(list);
1402
1403                 read_barrier();
1404                 if (td->verify_thread_exit)
1405                         break;
1406
1407                 pthread_mutex_lock(&td->io_u_lock);
1408
1409                 while (flist_empty(&td->verify_list) &&
1410                        !td->verify_thread_exit) {
1411                         ret = pthread_cond_wait(&td->verify_cond,
1412                                                         &td->io_u_lock);
1413                         if (ret) {
1414                                 pthread_mutex_unlock(&td->io_u_lock);
1415                                 break;
1416                         }
1417                 }
1418
1419                 flist_splice_init(&td->verify_list, &list);
1420                 pthread_mutex_unlock(&td->io_u_lock);
1421
1422                 if (flist_empty(&list))
1423                         continue;
1424
1425                 while (!flist_empty(&list)) {
1426                         io_u = flist_first_entry(&list, struct io_u, verify_list);
1427                         flist_del_init(&io_u->verify_list);
1428
1429                         io_u_set(td, io_u, IO_U_F_NO_FILE_PUT);
1430                         ret = verify_io_u(td, &io_u);
1431
1432                         put_io_u(td, io_u);
1433                         if (!ret)
1434                                 continue;
1435                         if (td_non_fatal_error(td, ERROR_TYPE_VERIFY_BIT, ret)) {
1436                                 update_error_count(td, ret);
1437                                 td_clear_error(td);
1438                                 ret = 0;
1439                         }
1440                 }
1441         } while (!ret);
1442
1443         if (ret) {
1444                 td_verror(td, ret, "async_verify");
1445                 if (td->o.verify_fatal)
1446                         fio_mark_td_terminate(td);
1447         }
1448
1449 done:
1450         pthread_mutex_lock(&td->io_u_lock);
1451         td->nr_verify_threads--;
1452         pthread_cond_signal(&td->free_cond);
1453         pthread_mutex_unlock(&td->io_u_lock);
1454
1455         return NULL;
1456 }
1457
1458 int verify_async_init(struct thread_data *td)
1459 {
1460         int i, ret;
1461         pthread_attr_t attr;
1462
1463         pthread_attr_init(&attr);
1464         pthread_attr_setstacksize(&attr, 2 * PTHREAD_STACK_MIN);
1465
1466         td->verify_thread_exit = 0;
1467
1468         td->verify_threads = malloc(sizeof(pthread_t) * td->o.verify_async);
1469         for (i = 0; i < td->o.verify_async; i++) {
1470                 ret = pthread_create(&td->verify_threads[i], &attr,
1471                                         verify_async_thread, td);
1472                 if (ret) {
1473                         log_err("fio: async verify creation failed: %s\n",
1474                                         strerror(ret));
1475                         break;
1476                 }
1477                 ret = pthread_detach(td->verify_threads[i]);
1478                 if (ret) {
1479                         log_err("fio: async verify thread detach failed: %s\n",
1480                                         strerror(ret));
1481                         break;
1482                 }
1483                 td->nr_verify_threads++;
1484         }
1485
1486         pthread_attr_destroy(&attr);
1487
1488         if (i != td->o.verify_async) {
1489                 log_err("fio: only %d verify threads started, exiting\n", i);
1490
1491                 pthread_mutex_lock(&td->io_u_lock);
1492                 td->verify_thread_exit = 1;
1493                 pthread_cond_broadcast(&td->verify_cond);
1494                 pthread_mutex_unlock(&td->io_u_lock);
1495
1496                 return 1;
1497         }
1498
1499         return 0;
1500 }
1501
1502 void verify_async_exit(struct thread_data *td)
1503 {
1504         pthread_mutex_lock(&td->io_u_lock);
1505         td->verify_thread_exit = 1;
1506         pthread_cond_broadcast(&td->verify_cond);
1507
1508         while (td->nr_verify_threads)
1509                 pthread_cond_wait(&td->free_cond, &td->io_u_lock);
1510
1511         pthread_mutex_unlock(&td->io_u_lock);
1512         free(td->verify_threads);
1513         td->verify_threads = NULL;
1514 }
1515
1516 int paste_blockoff(char *buf, unsigned int len, void *priv)
1517 {
1518         struct io_u *io = priv;
1519         unsigned long long off;
1520
1521         typecheck(__typeof__(off), io->offset);
1522         off = cpu_to_le64((uint64_t)io->offset);
1523         len = min(len, (unsigned int)sizeof(off));
1524         memcpy(buf, &off, len);
1525         return 0;
1526 }
1527
1528 static int __fill_file_completions(struct thread_data *td,
1529                                    struct thread_io_list *s,
1530                                    struct fio_file *f, unsigned int *index)
1531 {
1532         unsigned int comps;
1533         int i, j;
1534
1535         if (!f->last_write_comp)
1536                 return 0;
1537
1538         if (td->io_blocks[DDIR_WRITE] < td->o.iodepth)
1539                 comps = td->io_blocks[DDIR_WRITE];
1540         else
1541                 comps = td->o.iodepth;
1542
1543         j = f->last_write_idx - 1;
1544         for (i = 0; i < comps; i++) {
1545                 if (j == -1)
1546                         j = td->o.iodepth - 1;
1547                 s->comps[*index].fileno = __cpu_to_le64(f->fileno);
1548                 s->comps[*index].offset = cpu_to_le64(f->last_write_comp[j]);
1549                 (*index)++;
1550                 j--;
1551         }
1552
1553         return comps;
1554 }
1555
1556 static int fill_file_completions(struct thread_data *td,
1557                                  struct thread_io_list *s, unsigned int *index)
1558 {
1559         struct fio_file *f;
1560         unsigned int i;
1561         int comps = 0;
1562
1563         for_each_file(td, f, i)
1564                 comps += __fill_file_completions(td, s, f, index);
1565
1566         return comps;
1567 }
1568
1569 struct all_io_list *get_all_io_list(int save_mask, size_t *sz)
1570 {
1571         struct all_io_list *rep;
1572         struct thread_data *td;
1573         size_t depth;
1574         void *next;
1575         int i, nr;
1576
1577         compiletime_assert(sizeof(struct all_io_list) == 8, "all_io_list");
1578
1579         /*
1580          * Calculate reply space needed. We need one 'io_state' per thread,
1581          * and the size will vary depending on depth.
1582          */
1583         depth = 0;
1584         nr = 0;
1585         for_each_td(td, i) {
1586                 if (save_mask != IO_LIST_ALL && (i + 1) != save_mask)
1587                         continue;
1588                 td->stop_io = 1;
1589                 td->flags |= TD_F_VSTATE_SAVED;
1590                 depth += (td->o.iodepth * td->o.nr_files);
1591                 nr++;
1592         }
1593
1594         if (!nr)
1595                 return NULL;
1596
1597         *sz = sizeof(*rep);
1598         *sz += nr * sizeof(struct thread_io_list);
1599         *sz += depth * sizeof(struct file_comp);
1600         rep = malloc(*sz);
1601         memset(rep, 0, *sz);
1602
1603         rep->threads = cpu_to_le64((uint64_t) nr);
1604
1605         next = &rep->state[0];
1606         for_each_td(td, i) {
1607                 struct thread_io_list *s = next;
1608                 unsigned int comps, index = 0;
1609
1610                 if (save_mask != IO_LIST_ALL && (i + 1) != save_mask)
1611                         continue;
1612
1613                 comps = fill_file_completions(td, s, &index);
1614
1615                 s->no_comps = cpu_to_le64((uint64_t) comps);
1616                 s->depth = cpu_to_le64((uint64_t) td->o.iodepth);
1617                 s->nofiles = cpu_to_le64((uint64_t) td->o.nr_files);
1618                 s->numberio = cpu_to_le64((uint64_t) td->io_issues[DDIR_WRITE]);
1619                 s->index = cpu_to_le64((uint64_t) i);
1620                 if (td->random_state.use64) {
1621                         s->rand.state64.s[0] = cpu_to_le64(td->random_state.state64.s1);
1622                         s->rand.state64.s[1] = cpu_to_le64(td->random_state.state64.s2);
1623                         s->rand.state64.s[2] = cpu_to_le64(td->random_state.state64.s3);
1624                         s->rand.state64.s[3] = cpu_to_le64(td->random_state.state64.s4);
1625                         s->rand.state64.s[4] = cpu_to_le64(td->random_state.state64.s5);
1626                         s->rand.state64.s[5] = 0;
1627                         s->rand.use64 = cpu_to_le64((uint64_t)1);
1628                 } else {
1629                         s->rand.state32.s[0] = cpu_to_le32(td->random_state.state32.s1);
1630                         s->rand.state32.s[1] = cpu_to_le32(td->random_state.state32.s2);
1631                         s->rand.state32.s[2] = cpu_to_le32(td->random_state.state32.s3);
1632                         s->rand.state32.s[3] = 0;
1633                         s->rand.use64 = 0;
1634                 }
1635                 snprintf((char *) s->name, sizeof(s->name), "%s", td->o.name);
1636                 next = io_list_next(s);
1637         }
1638
1639         return rep;
1640 }
1641
1642 static int open_state_file(const char *name, const char *prefix, int num,
1643                            int for_write)
1644 {
1645         char out[PATH_MAX];
1646         int flags;
1647         int fd;
1648
1649         if (for_write)
1650                 flags = O_CREAT | O_TRUNC | O_WRONLY | O_SYNC;
1651         else
1652                 flags = O_RDONLY;
1653
1654         verify_state_gen_name(out, sizeof(out), name, prefix, num);
1655
1656         fd = open(out, flags, 0644);
1657         if (fd == -1) {
1658                 perror("fio: open state file");
1659                 log_err("fio: state file: %s (for_write=%d)\n", out, for_write);
1660                 return -1;
1661         }
1662
1663         return fd;
1664 }
1665
1666 static int write_thread_list_state(struct thread_io_list *s,
1667                                    const char *prefix)
1668 {
1669         struct verify_state_hdr hdr;
1670         uint64_t crc;
1671         ssize_t ret;
1672         int fd;
1673
1674         fd = open_state_file((const char *) s->name, prefix, s->index, 1);
1675         if (fd == -1)
1676                 return 1;
1677
1678         crc = fio_crc32c((void *)s, thread_io_list_sz(s));
1679
1680         hdr.version = cpu_to_le64((uint64_t) VSTATE_HDR_VERSION);
1681         hdr.size = cpu_to_le64((uint64_t) thread_io_list_sz(s));
1682         hdr.crc = cpu_to_le64(crc);
1683         ret = write(fd, &hdr, sizeof(hdr));
1684         if (ret != sizeof(hdr))
1685                 goto write_fail;
1686
1687         ret = write(fd, s, thread_io_list_sz(s));
1688         if (ret != thread_io_list_sz(s)) {
1689 write_fail:
1690                 if (ret < 0)
1691                         perror("fio: write state file");
1692                 log_err("fio: failed to write state file\n");
1693                 ret = 1;
1694         } else
1695                 ret = 0;
1696
1697         close(fd);
1698         return ret;
1699 }
1700
1701 void __verify_save_state(struct all_io_list *state, const char *prefix)
1702 {
1703         struct thread_io_list *s = &state->state[0];
1704         unsigned int i;
1705
1706         for (i = 0; i < le64_to_cpu(state->threads); i++) {
1707                 write_thread_list_state(s,  prefix);
1708                 s = io_list_next(s);
1709         }
1710 }
1711
1712 void verify_save_state(int mask)
1713 {
1714         struct all_io_list *state;
1715         size_t sz;
1716
1717         state = get_all_io_list(mask, &sz);
1718         if (state) {
1719                 char prefix[PATH_MAX];
1720
1721                 if (aux_path)
1722                         sprintf(prefix, "%s%clocal", aux_path, FIO_OS_PATH_SEPARATOR);
1723                 else
1724                         strcpy(prefix, "local");
1725
1726                 __verify_save_state(state, prefix);
1727                 free(state);
1728         }
1729 }
1730
1731 void verify_free_state(struct thread_data *td)
1732 {
1733         if (td->vstate)
1734                 free(td->vstate);
1735 }
1736
1737 void verify_assign_state(struct thread_data *td, void *p)
1738 {
1739         struct thread_io_list *s = p;
1740         int i;
1741
1742         s->no_comps = le64_to_cpu(s->no_comps);
1743         s->depth = le32_to_cpu(s->depth);
1744         s->nofiles = le32_to_cpu(s->nofiles);
1745         s->numberio = le64_to_cpu(s->numberio);
1746         s->rand.use64 = le64_to_cpu(s->rand.use64);
1747
1748         if (s->rand.use64) {
1749                 for (i = 0; i < 6; i++)
1750                         s->rand.state64.s[i] = le64_to_cpu(s->rand.state64.s[i]);
1751         } else {
1752                 for (i = 0; i < 4; i++)
1753                         s->rand.state32.s[i] = le32_to_cpu(s->rand.state32.s[i]);
1754         }
1755
1756         for (i = 0; i < s->no_comps; i++) {
1757                 s->comps[i].fileno = le64_to_cpu(s->comps[i].fileno);
1758                 s->comps[i].offset = le64_to_cpu(s->comps[i].offset);
1759         }
1760
1761         td->vstate = p;
1762 }
1763
1764 int verify_state_hdr(struct verify_state_hdr *hdr, struct thread_io_list *s)
1765 {
1766         uint64_t crc;
1767
1768         hdr->version = le64_to_cpu(hdr->version);
1769         hdr->size = le64_to_cpu(hdr->size);
1770         hdr->crc = le64_to_cpu(hdr->crc);
1771
1772         if (hdr->version != VSTATE_HDR_VERSION)
1773                 return 1;
1774
1775         crc = fio_crc32c((void *)s, hdr->size);
1776         if (crc != hdr->crc)
1777                 return 1;
1778
1779         return 0;
1780 }
1781
1782 int verify_load_state(struct thread_data *td, const char *prefix)
1783 {
1784         struct verify_state_hdr hdr;
1785         void *s = NULL;
1786         uint64_t crc;
1787         ssize_t ret;
1788         int fd;
1789
1790         if (!td->o.verify_state)
1791                 return 0;
1792
1793         fd = open_state_file(td->o.name, prefix, td->thread_number - 1, 0);
1794         if (fd == -1)
1795                 return 1;
1796
1797         ret = read(fd, &hdr, sizeof(hdr));
1798         if (ret != sizeof(hdr)) {
1799                 if (ret < 0)
1800                         td_verror(td, errno, "read verify state hdr");
1801                 log_err("fio: failed reading verify state header\n");
1802                 goto err;
1803         }
1804
1805         hdr.version = le64_to_cpu(hdr.version);
1806         hdr.size = le64_to_cpu(hdr.size);
1807         hdr.crc = le64_to_cpu(hdr.crc);
1808
1809         if (hdr.version != VSTATE_HDR_VERSION) {
1810                 log_err("fio: unsupported (%d) version in verify state header\n",
1811                                 (unsigned int) hdr.version);
1812                 goto err;
1813         }
1814
1815         s = malloc(hdr.size);
1816         ret = read(fd, s, hdr.size);
1817         if (ret != hdr.size) {
1818                 if (ret < 0)
1819                         td_verror(td, errno, "read verify state");
1820                 log_err("fio: failed reading verity state\n");
1821                 goto err;
1822         }
1823
1824         crc = fio_crc32c(s, hdr.size);
1825         if (crc != hdr.crc) {
1826                 log_err("fio: verify state is corrupt\n");
1827                 goto err;
1828         }
1829
1830         close(fd);
1831
1832         verify_assign_state(td, s);
1833         return 0;
1834 err:
1835         if (s)
1836                 free(s);
1837         close(fd);
1838         return 1;
1839 }
1840
1841 /*
1842  * Use the loaded verify state to know when to stop doing verification
1843  */
1844 int verify_state_should_stop(struct thread_data *td, struct io_u *io_u)
1845 {
1846         struct thread_io_list *s = td->vstate;
1847         struct fio_file *f = io_u->file;
1848         int i;
1849
1850         if (!s || !f)
1851                 return 0;
1852
1853         /*
1854          * If we're not into the window of issues - depth yet, continue. If
1855          * issue is shorter than depth, do check.
1856          */
1857         if ((td->io_blocks[DDIR_READ] < s->depth ||
1858             s->numberio - td->io_blocks[DDIR_READ] > s->depth) &&
1859             s->numberio > s->depth)
1860                 return 0;
1861
1862         /*
1863          * We're in the window of having to check if this io was
1864          * completed or not. If the IO was seen as completed, then
1865          * lets verify it.
1866          */
1867         for (i = 0; i < s->no_comps; i++) {
1868                 if (s->comps[i].fileno != f->fileno)
1869                         continue;
1870                 if (io_u->verify_offset == s->comps[i].offset)
1871                         return 0;
1872         }
1873
1874         /*
1875          * Not found, we have to stop
1876          */
1877         return 1;
1878 }