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
  37 void fill_buffer_pattern(struct thread_data *td, void *p, unsigned int len)
  38 {
  39         (void)cpy_pattern(td->o.buffer_pattern, td->o.buffer_pattern_bytes, p, len);
  40 }
  41
  42 static void __fill_buffer(struct thread_options *o, unsigned long seed, void *p,
  43                           unsigned int len)
  44 {
  45         __fill_random_buf_percentage(seed, p, o->compress_percentage, len, len, o->buffer_pattern, o->buffer_pattern_bytes);
  46 }
  47
  48 static unsigned long fill_buffer(struct thread_data *td, void *p,
  49                                  unsigned int len)
  50 {
  51         struct frand_state *fs = &td->verify_state;
  52         struct thread_options *o = &td->o;
  53
  54         return fill_random_buf_percentage(fs, p, o->compress_percentage, len, len, o->buffer_pattern, o->buffer_pattern_bytes);
  55 }
  56
  57 void fill_verify_pattern(struct thread_data *td, void *p, unsigned int len,
  58                          struct io_u *io_u, unsigned long seed, int use_seed)
  59 {
  60         struct thread_options *o = &td->o;
  61
  62         if (!o->verify_pattern_bytes) {
  63                 dprint(FD_VERIFY, "fill random bytes len=%u\n", len);
  64
  65                 if (use_seed)
  66                         __fill_buffer(o, seed, p, len);
  67                 else
  68                         io_u->rand_seed = fill_buffer(td, p, len);
  69                 return;
  70         }
  71
  72         /* Skip if we were here and we do not need to patch pattern
  73          * with format */
  74         if (!td->o.verify_fmt_sz && io_u->buf_filled_len >= len) {
  75                 dprint(FD_VERIFY, "using already filled verify pattern b=%d len=%u\n",
  76                         o->verify_pattern_bytes, len);
  77                 return;
  78         }
  79
  80         (void)paste_format(td->o.verify_pattern, td->o.verify_pattern_bytes,
  81                            td->o.verify_fmt, td->o.verify_fmt_sz,
  82                            p, len, io_u);
  83         io_u->buf_filled_len = len;
  84 }
  85
  86 static unsigned int get_hdr_inc(struct thread_data *td, struct io_u *io_u)
  87 {
  88         unsigned int hdr_inc;
  89
  90         hdr_inc = io_u->buflen;
  91         if (td->o.verify_interval && td->o.verify_interval <= io_u->buflen)
  92                 hdr_inc = td->o.verify_interval;
  93
  94         return hdr_inc;
  95 }
  96
  97 static void fill_pattern_headers(struct thread_data *td, struct io_u *io_u,
  98                                  unsigned long seed, int use_seed)
  99 {
 100         unsigned int hdr_inc, header_num;
 101         struct verify_header *hdr;
 102         void *p = io_u->buf;
 103
 104         fill_verify_pattern(td, p, io_u->buflen, io_u, seed, use_seed);
 105
 106         hdr_inc = get_hdr_inc(td, io_u);
 107         header_num = 0;
 108         for (; p < io_u->buf + io_u->buflen; p += hdr_inc) {
 109                 hdr = p;
 110                 populate_hdr(td, io_u, hdr, header_num, hdr_inc);
 111                 header_num++;
 112         }
 113 }
 114
 115 static void memswp(void *buf1, void *buf2, unsigned int len)
 116 {
 117         char swap[200];
 118
 119         assert(len <= sizeof(swap));
 120
 121         memcpy(&swap, buf1, len);
 122         memcpy(buf1, buf2, len);
 123         memcpy(buf2, &swap, len);
 124 }
 125
 126 static void hexdump(void *buffer, int len)
 127 {
 128         unsigned char *p = buffer;
 129         int i;
 130
 131         for (i = 0; i < len; i++)
 132                 log_err("%02x", p[i]);
 133         log_err("\n");
 134 }
 135
 136 /*
 137  * Prepare for separation of verify_header and checksum header
 138  */
 139 static inline unsigned int __hdr_size(int verify_type)
 140 {
 141         unsigned int len = 0;
 142
 143         switch (verify_type) {
 144         case VERIFY_NONE:
 145         case VERIFY_HDR_ONLY:
 146         case VERIFY_NULL:
 147         case VERIFY_PATTERN:
 148                 len = 0;
 149                 break;
 150         case VERIFY_MD5:
 151                 len = sizeof(struct vhdr_md5);
 152                 break;
 153         case VERIFY_CRC64:
 154                 len = sizeof(struct vhdr_crc64);
 155                 break;
 156         case VERIFY_CRC32C:
 157         case VERIFY_CRC32:
 158         case VERIFY_CRC32C_INTEL:
 159                 len = sizeof(struct vhdr_crc32);
 160                 break;
 161         case VERIFY_CRC16:
 162                 len = sizeof(struct vhdr_crc16);
 163                 break;
 164         case VERIFY_CRC7:
 165                 len = sizeof(struct vhdr_crc7);
 166                 break;
 167         case VERIFY_SHA256:
 168                 len = sizeof(struct vhdr_sha256);
 169                 break;
 170         case VERIFY_SHA512:
 171                 len = sizeof(struct vhdr_sha512);
 172                 break;
 173         case VERIFY_SHA3_224:
 174                 len = sizeof(struct vhdr_sha3_224);
 175                 break;
 176         case VERIFY_SHA3_256:
 177                 len = sizeof(struct vhdr_sha3_256);
 178                 break;
 179         case VERIFY_SHA3_384:
 180                 len = sizeof(struct vhdr_sha3_384);
 181                 break;
 182         case VERIFY_SHA3_512:
 183                 len = sizeof(struct vhdr_sha3_512);
 184                 break;
 185         case VERIFY_XXHASH:
 186                 len = sizeof(struct vhdr_xxhash);
 187                 break;
 188         case VERIFY_SHA1:
 189                 len = sizeof(struct vhdr_sha1);
 190                 break;
 191         case VERIFY_PATTERN_NO_HDR:
 192                 return 0;
 193         default:
 194                 log_err("fio: unknown verify header!\n");
 195                 assert(0);
 196         }
 197
 198         return len + sizeof(struct verify_header);
 199 }
 200
 201 static inline unsigned int hdr_size(struct thread_data *td,
 202                                     struct verify_header *hdr)
 203 {
 204         if (td->o.verify == VERIFY_PATTERN_NO_HDR)
 205                 return 0;
 206
 207         return __hdr_size(hdr->verify_type);
 208 }
 209
 210 static void *hdr_priv(struct verify_header *hdr)
 211 {
 212         void *priv = hdr;
 213
 214         return priv + sizeof(struct verify_header);
 215 }
 216
 217 /*
 218  * Verify container, pass info to verify handlers and allow them to
 219  * pass info back in case of error
 220  */
 221 struct vcont {
 222         /*
 223          * Input
 224          */
 225         struct io_u *io_u;
 226         unsigned int hdr_num;
 227         struct thread_data *td;
 228
 229         /*
 230          * Output, only valid in case of error
 231          */
 232         const char *name;
 233         void *good_crc;
 234         void *bad_crc;
 235         unsigned int crc_len;
 236 };
 237
 238 #define DUMP_BUF_SZ     255
 239 static int dump_buf_warned;
 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[DUMP_BUF_SZ];
 245         size_t buf_left = DUMP_BUF_SZ;
 246         int ret, fd;
 247
 248         ptr = strdup(f->file_name);
 249
 250         memset(fname, 0, sizeof(fname));
 251         if (aux_path)
 252                 sprintf(fname, "%s%c", aux_path, FIO_OS_PATH_SEPARATOR);
 253
 254         strncpy(fname + strlen(fname), basename(ptr), buf_left - 1);
 255
 256         buf_left -= strlen(fname);
 257         if (buf_left <= 0) {
 258                 if (!dump_buf_warned) {
 259                         log_err("fio: verify failure dump buffer too small\n");
 260                         dump_buf_warned = 1;
 261                 }
 262                 free(ptr);
 263                 return;
 264         }
 265
 266         snprintf(fname + strlen(fname), buf_left, ".%llu.%s", offset, type);
 267
 268         fd = open(fname, O_CREAT | O_TRUNC | O_WRONLY, 0644);
 269         if (fd < 0) {
 270                 perror("open verify buf file");
 271                 free(ptr);
 272                 return;
 273         }
 274
 275         while (len) {
 276                 ret = write(fd, buf, len);
 277                 if (!ret)
 278                         break;
 279                 else if (ret < 0) {
 280                         perror("write verify buf file");
 281                         break;
 282                 }
 283                 len -= ret;
 284                 buf += ret;
 285         }
 286
 287         close(fd);
 288         log_err("       %s data dumped as %s\n", type, fname);
 289         free(ptr);
 290 }
 291
 292 /*
 293  * Dump the contents of the read block and re-generate the correct data
 294  * and dump that too.
 295  */
 296 static void __dump_verify_buffers(struct verify_header *hdr, struct vcont *vc)
 297 {
 298         struct thread_data *td = vc->td;
 299         struct io_u *io_u = vc->io_u;
 300         unsigned long hdr_offset;
 301         struct io_u dummy;
 302         void *buf;
 303
 304         if (!td->o.verify_dump)
 305                 return;
 306
 307         /*
 308          * Dump the contents we just read off disk
 309          */
 310         hdr_offset = vc->hdr_num * hdr->len;
 311
 312         dump_buf(io_u->buf + hdr_offset, hdr->len, io_u->offset + hdr_offset,
 313                         "received", vc->io_u->file);
 314
 315         /*
 316          * Allocate a new buf and re-generate the original data
 317          */
 318         buf = malloc(io_u->buflen);
 319         dummy = *io_u;
 320         dummy.buf = buf;
 321         dummy.rand_seed = hdr->rand_seed;
 322         dummy.buf_filled_len = 0;
 323         dummy.buflen = io_u->buflen;
 324
 325         fill_pattern_headers(td, &dummy, hdr->rand_seed, 1);
 326
 327         dump_buf(buf + hdr_offset, hdr->len, io_u->offset + hdr_offset,
 328                         "expected", vc->io_u->file);
 329         free(buf);
 330 }
 331
 332 static void dump_verify_buffers(struct verify_header *hdr, struct vcont *vc)
 333 {
 334         struct thread_data *td = vc->td;
 335         struct verify_header shdr;
 336
 337         if (td->o.verify == VERIFY_PATTERN_NO_HDR) {
 338                 __fill_hdr(td, vc->io_u, &shdr, 0, vc->io_u->buflen, 0);
 339                 hdr = &shdr;
 340         }
 341
 342         __dump_verify_buffers(hdr, vc);
 343 }
 344
 345 static void log_verify_failure(struct verify_header *hdr, struct vcont *vc)
 346 {
 347         unsigned long long offset;
 348
 349         offset = vc->io_u->offset;
 350         offset += vc->hdr_num * hdr->len;
 351         log_err("%.8s: verify failed at file %s offset %llu, length %u\n",
 352                         vc->name, vc->io_u->file->file_name, offset, hdr->len);
 353
 354         if (vc->good_crc && vc->bad_crc) {
 355                 log_err("       Expected CRC: ");
 356                 hexdump(vc->good_crc, vc->crc_len);
 357                 log_err("       Received CRC: ");
 358                 hexdump(vc->bad_crc, vc->crc_len);
 359         }
 360
 361         dump_verify_buffers(hdr, vc);
 362 }
 363
 364 /*
 365  * Return data area 'header_num'
 366  */
 367 static inline void *io_u_verify_off(struct verify_header *hdr, struct vcont *vc)
 368 {
 369         return vc->io_u->buf + vc->hdr_num * hdr->len + hdr_size(vc->td, hdr);
 370 }
 371
 372 static int verify_io_u_pattern(struct verify_header *hdr, struct vcont *vc)
 373 {
 374         struct thread_data *td = vc->td;
 375         struct io_u *io_u = vc->io_u;
 376         char *buf, *pattern;
 377         unsigned int header_size = __hdr_size(td->o.verify);
 378         unsigned int len, mod, i, pattern_size;
 379         int rc;
 380
 381         pattern = td->o.verify_pattern;
 382         pattern_size = td->o.verify_pattern_bytes;
 383         assert(pattern_size != 0);
 384
 385         (void)paste_format_inplace(pattern, pattern_size,
 386                                    td->o.verify_fmt, td->o.verify_fmt_sz, io_u);
 387
 388         buf = (char *) hdr + header_size;
 389         len = get_hdr_inc(td, io_u) - header_size;
 390         mod = (get_hdr_inc(td, io_u) * vc->hdr_num + header_size) % pattern_size;
 391
 392         rc = cmp_pattern(pattern, pattern_size, mod, buf, len);
 393         if (!rc)
 394                 return 0;
 395
 396         /* Slow path, compare each byte */
 397         for (i = 0; i < len; i++) {
 398                 if (buf[i] != pattern[mod]) {
 399                         unsigned int bits;
 400
 401                         bits = hweight8(buf[i] ^ pattern[mod]);
 402                         log_err("fio: got pattern '%02x', wanted '%02x'. Bad bits %d\n",
 403                                 (unsigned char)buf[i],
 404                                 (unsigned char)pattern[mod],
 405                                 bits);
 406                         log_err("fio: bad pattern block offset %u\n", i);
 407                         vc->name = "pattern";
 408                         log_verify_failure(hdr, vc);
 409                         return EILSEQ;
 410                 }
 411                 mod++;
 412                 if (mod == td->o.verify_pattern_bytes)
 413                         mod = 0;
 414         }
 415
 416         /* Unreachable line */
 417         assert(0);
 418         return EILSEQ;
 419 }
 420
 421 static int verify_io_u_xxhash(struct verify_header *hdr, struct vcont *vc)
 422 {
 423         void *p = io_u_verify_off(hdr, vc);
 424         struct vhdr_xxhash *vh = hdr_priv(hdr);
 425         uint32_t hash;
 426         void *state;
 427
 428         dprint(FD_VERIFY, "xxhash verify io_u %p, len %u\n", vc->io_u, hdr->len);
 429
 430         state = XXH32_init(1);
 431         XXH32_update(state, p, hdr->len - hdr_size(vc->td, hdr));
 432         hash = XXH32_digest(state);
 433
 434         if (vh->hash == hash)
 435                 return 0;
 436
 437         vc->name = "xxhash";
 438         vc->good_crc = &vh->hash;
 439         vc->bad_crc = &hash;
 440         vc->crc_len = sizeof(hash);
 441         log_verify_failure(hdr, vc);
 442         return EILSEQ;
 443 }
 444
 445 static int verify_io_u_sha3(struct verify_header *hdr, struct vcont *vc,
 446                             struct fio_sha3_ctx *sha3_ctx, uint8_t *sha,
 447                             unsigned int sha_size, const char *name)
 448 {
 449         void *p = io_u_verify_off(hdr, vc);
 450
 451         dprint(FD_VERIFY, "%s verify io_u %p, len %u\n", name, vc->io_u, hdr->len);
 452
 453         fio_sha3_update(sha3_ctx, p, hdr->len - hdr_size(vc->td, hdr));
 454         fio_sha3_final(sha3_ctx);
 455
 456         if (!memcmp(sha, sha3_ctx->sha, sha_size))
 457                 return 0;
 458
 459         vc->name = name;
 460         vc->good_crc = sha;
 461         vc->bad_crc = sha3_ctx->sha;
 462         vc->crc_len = sha_size;
 463         log_verify_failure(hdr, vc);
 464         return EILSEQ;
 465 }
 466
 467 static int verify_io_u_sha3_224(struct verify_header *hdr, struct vcont *vc)
 468 {
 469         struct vhdr_sha3_224 *vh = hdr_priv(hdr);
 470         uint8_t sha[SHA3_224_DIGEST_SIZE];
 471         struct fio_sha3_ctx sha3_ctx = {
 472                 .sha = sha,
 473         };
 474
 475         fio_sha3_224_init(&sha3_ctx);
 476
 477         return verify_io_u_sha3(hdr, vc, &sha3_ctx, vh->sha,
 478                                 SHA3_224_DIGEST_SIZE, "sha3-224");
 479 }
 480
 481 static int verify_io_u_sha3_256(struct verify_header *hdr, struct vcont *vc)
 482 {
 483         struct vhdr_sha3_256 *vh = hdr_priv(hdr);
 484         uint8_t sha[SHA3_256_DIGEST_SIZE];
 485         struct fio_sha3_ctx sha3_ctx = {
 486                 .sha = sha,
 487         };
 488
 489         fio_sha3_256_init(&sha3_ctx);
 490
 491         return verify_io_u_sha3(hdr, vc, &sha3_ctx, vh->sha,
 492                                 SHA3_256_DIGEST_SIZE, "sha3-256");
 493 }
 494
 495 static int verify_io_u_sha3_384(struct verify_header *hdr, struct vcont *vc)
 496 {
 497         struct vhdr_sha3_384 *vh = hdr_priv(hdr);
 498         uint8_t sha[SHA3_384_DIGEST_SIZE];
 499         struct fio_sha3_ctx sha3_ctx = {
 500                 .sha = sha,
 501         };
 502
 503         fio_sha3_384_init(&sha3_ctx);
 504
 505         return verify_io_u_sha3(hdr, vc, &sha3_ctx, vh->sha,
 506                                 SHA3_384_DIGEST_SIZE, "sha3-384");
 507 }
 508
 509 static int verify_io_u_sha3_512(struct verify_header *hdr, struct vcont *vc)
 510 {
 511         struct vhdr_sha3_512 *vh = hdr_priv(hdr);
 512         uint8_t sha[SHA3_512_DIGEST_SIZE];
 513         struct fio_sha3_ctx sha3_ctx = {
 514                 .sha = sha,
 515         };
 516
 517         fio_sha3_512_init(&sha3_ctx);
 518
 519         return verify_io_u_sha3(hdr, vc, &sha3_ctx, vh->sha,
 520                                 SHA3_512_DIGEST_SIZE, "sha3-512");
 521 }
 522
 523 static int verify_io_u_sha512(struct verify_header *hdr, struct vcont *vc)
 524 {
 525         void *p = io_u_verify_off(hdr, vc);
 526         struct vhdr_sha512 *vh = hdr_priv(hdr);
 527         uint8_t sha512[128];
 528         struct fio_sha512_ctx sha512_ctx = {
 529                 .buf = sha512,
 530         };
 531
 532         dprint(FD_VERIFY, "sha512 verify io_u %p, len %u\n", vc->io_u, hdr->len);
 533
 534         fio_sha512_init(&sha512_ctx);
 535         fio_sha512_update(&sha512_ctx, p, hdr->len - hdr_size(vc->td, hdr));
 536
 537         if (!memcmp(vh->sha512, sha512_ctx.buf, sizeof(sha512)))
 538                 return 0;
 539
 540         vc->name = "sha512";
 541         vc->good_crc = vh->sha512;
 542         vc->bad_crc = sha512_ctx.buf;
 543         vc->crc_len = sizeof(vh->sha512);
 544         log_verify_failure(hdr, vc);
 545         return EILSEQ;
 546 }
 547
 548 static int verify_io_u_sha256(struct verify_header *hdr, struct vcont *vc)
 549 {
 550         void *p = io_u_verify_off(hdr, vc);
 551         struct vhdr_sha256 *vh = hdr_priv(hdr);
 552         uint8_t sha256[64];
 553         struct fio_sha256_ctx sha256_ctx = {
 554                 .buf = sha256,
 555         };
 556
 557         dprint(FD_VERIFY, "sha256 verify io_u %p, len %u\n", vc->io_u, hdr->len);
 558
 559         fio_sha256_init(&sha256_ctx);
 560         fio_sha256_update(&sha256_ctx, p, hdr->len - hdr_size(vc->td, hdr));
 561         fio_sha256_final(&sha256_ctx);
 562
 563         if (!memcmp(vh->sha256, sha256_ctx.buf, sizeof(sha256)))
 564                 return 0;
 565
 566         vc->name = "sha256";
 567         vc->good_crc = vh->sha256;
 568         vc->bad_crc = sha256_ctx.buf;
 569         vc->crc_len = sizeof(vh->sha256);
 570         log_verify_failure(hdr, vc);
 571         return EILSEQ;
 572 }
 573
 574 static int verify_io_u_sha1(struct verify_header *hdr, struct vcont *vc)
 575 {
 576         void *p = io_u_verify_off(hdr, vc);
 577         struct vhdr_sha1 *vh = hdr_priv(hdr);
 578         uint32_t sha1[5];
 579         struct fio_sha1_ctx sha1_ctx = {
 580                 .H = sha1,
 581         };
 582
 583         dprint(FD_VERIFY, "sha1 verify io_u %p, len %u\n", vc->io_u, hdr->len);
 584
 585         fio_sha1_init(&sha1_ctx);
 586         fio_sha1_update(&sha1_ctx, p, hdr->len - hdr_size(vc->td, hdr));
 587         fio_sha1_final(&sha1_ctx);
 588
 589         if (!memcmp(vh->sha1, sha1_ctx.H, sizeof(sha1)))
 590                 return 0;
 591
 592         vc->name = "sha1";
 593         vc->good_crc = vh->sha1;
 594         vc->bad_crc = sha1_ctx.H;
 595         vc->crc_len = sizeof(vh->sha1);
 596         log_verify_failure(hdr, vc);
 597         return EILSEQ;
 598 }
 599
 600 static int verify_io_u_crc7(struct verify_header *hdr, struct vcont *vc)
 601 {
 602         void *p = io_u_verify_off(hdr, vc);
 603         struct vhdr_crc7 *vh = hdr_priv(hdr);
 604         unsigned char c;
 605
 606         dprint(FD_VERIFY, "crc7 verify io_u %p, len %u\n", vc->io_u, hdr->len);
 607
 608         c = fio_crc7(p, hdr->len - hdr_size(vc->td, hdr));
 609
 610         if (c == vh->crc7)
 611                 return 0;
 612
 613         vc->name = "crc7";
 614         vc->good_crc = &vh->crc7;
 615         vc->bad_crc = &c;
 616         vc->crc_len = 1;
 617         log_verify_failure(hdr, vc);
 618         return EILSEQ;
 619 }
 620
 621 static int verify_io_u_crc16(struct verify_header *hdr, struct vcont *vc)
 622 {
 623         void *p = io_u_verify_off(hdr, vc);
 624         struct vhdr_crc16 *vh = hdr_priv(hdr);
 625         unsigned short c;
 626
 627         dprint(FD_VERIFY, "crc16 verify io_u %p, len %u\n", vc->io_u, hdr->len);
 628
 629         c = fio_crc16(p, hdr->len - hdr_size(vc->td, hdr));
 630
 631         if (c == vh->crc16)
 632                 return 0;
 633
 634         vc->name = "crc16";
 635         vc->good_crc = &vh->crc16;
 636         vc->bad_crc = &c;
 637         vc->crc_len = 2;
 638         log_verify_failure(hdr, vc);
 639         return EILSEQ;
 640 }
 641
 642 static int verify_io_u_crc64(struct verify_header *hdr, struct vcont *vc)
 643 {
 644         void *p = io_u_verify_off(hdr, vc);
 645         struct vhdr_crc64 *vh = hdr_priv(hdr);
 646         unsigned long long c;
 647
 648         dprint(FD_VERIFY, "crc64 verify io_u %p, len %u\n", vc->io_u, hdr->len);
 649
 650         c = fio_crc64(p, hdr->len - hdr_size(vc->td, hdr));
 651
 652         if (c == vh->crc64)
 653                 return 0;
 654
 655         vc->name = "crc64";
 656         vc->good_crc = &vh->crc64;
 657         vc->bad_crc = &c;
 658         vc->crc_len = 8;
 659         log_verify_failure(hdr, vc);
 660         return EILSEQ;
 661 }
 662
 663 static int verify_io_u_crc32(struct verify_header *hdr, struct vcont *vc)
 664 {
 665         void *p = io_u_verify_off(hdr, vc);
 666         struct vhdr_crc32 *vh = hdr_priv(hdr);
 667         uint32_t c;
 668
 669         dprint(FD_VERIFY, "crc32 verify io_u %p, len %u\n", vc->io_u, hdr->len);
 670
 671         c = fio_crc32(p, hdr->len - hdr_size(vc->td, hdr));
 672
 673         if (c == vh->crc32)
 674                 return 0;
 675
 676         vc->name = "crc32";
 677         vc->good_crc = &vh->crc32;
 678         vc->bad_crc = &c;
 679         vc->crc_len = 4;
 680         log_verify_failure(hdr, vc);
 681         return EILSEQ;
 682 }
 683
 684 static int verify_io_u_crc32c(struct verify_header *hdr, struct vcont *vc)
 685 {
 686         void *p = io_u_verify_off(hdr, vc);
 687         struct vhdr_crc32 *vh = hdr_priv(hdr);
 688         uint32_t c;
 689
 690         dprint(FD_VERIFY, "crc32c verify io_u %p, len %u\n", vc->io_u, hdr->len);
 691
 692         c = fio_crc32c(p, hdr->len - hdr_size(vc->td, hdr));
 693
 694         if (c == vh->crc32)
 695                 return 0;
 696
 697         vc->name = "crc32c";
 698         vc->good_crc = &vh->crc32;
 699         vc->bad_crc = &c;
 700         vc->crc_len = 4;
 701         log_verify_failure(hdr, vc);
 702         return EILSEQ;
 703 }
 704
 705 static int verify_io_u_md5(struct verify_header *hdr, struct vcont *vc)
 706 {
 707         void *p = io_u_verify_off(hdr, vc);
 708         struct vhdr_md5 *vh = hdr_priv(hdr);
 709         uint32_t hash[MD5_HASH_WORDS];
 710         struct fio_md5_ctx md5_ctx = {
 711                 .hash = hash,
 712         };
 713
 714         dprint(FD_VERIFY, "md5 verify io_u %p, len %u\n", vc->io_u, hdr->len);
 715
 716         fio_md5_init(&md5_ctx);
 717         fio_md5_update(&md5_ctx, p, hdr->len - hdr_size(vc->td, hdr));
 718         fio_md5_final(&md5_ctx);
 719
 720         if (!memcmp(vh->md5_digest, md5_ctx.hash, sizeof(hash)))
 721                 return 0;
 722
 723         vc->name = "md5";
 724         vc->good_crc = vh->md5_digest;
 725         vc->bad_crc = md5_ctx.hash;
 726         vc->crc_len = sizeof(hash);
 727         log_verify_failure(hdr, vc);
 728         return EILSEQ;
 729 }
 730
 731 /*
 732  * Push IO verification to a separate thread
 733  */
 734 int verify_io_u_async(struct thread_data *td, struct io_u **io_u_ptr)
 735 {
 736         struct io_u *io_u = *io_u_ptr;
 737
 738         pthread_mutex_lock(&td->io_u_lock);
 739
 740         if (io_u->file)
 741                 put_file_log(td, io_u->file);
 742
 743         if (io_u->flags & IO_U_F_IN_CUR_DEPTH) {
 744                 td->cur_depth--;
 745                 io_u_clear(td, io_u, IO_U_F_IN_CUR_DEPTH);
 746         }
 747         flist_add_tail(&io_u->verify_list, &td->verify_list);
 748         *io_u_ptr = NULL;
 749         pthread_mutex_unlock(&td->io_u_lock);
 750
 751         pthread_cond_signal(&td->verify_cond);
 752         return 0;
 753 }
 754
 755 /*
 756  * Thanks Rusty, for spending the time so I don't have to.
 757  *
 758  * http://rusty.ozlabs.org/?p=560
 759  */
 760 static int mem_is_zero(const void *data, size_t length)
 761 {
 762         const unsigned char *p = data;
 763         size_t len;
 764
 765         /* Check first 16 bytes manually */
 766         for (len = 0; len < 16; len++) {
 767                 if (!length)
 768                         return 1;
 769                 if (*p)
 770                         return 0;
 771                 p++;
 772                 length--;
 773         }
 774
 775         /* Now we know that's zero, memcmp with self. */
 776         return memcmp(data, p, length) == 0;
 777 }
 778
 779 static int mem_is_zero_slow(const void *data, size_t length, size_t *offset)
 780 {
 781         const unsigned char *p = data;
 782
 783         *offset = 0;
 784         while (length) {
 785                 if (*p)
 786                         break;
 787                 (*offset)++;
 788                 length--;
 789                 p++;
 790         }
 791
 792         return !length;
 793 }
 794
 795 static int verify_trimmed_io_u(struct thread_data *td, struct io_u *io_u)
 796 {
 797         size_t offset;
 798
 799         if (!td->o.trim_zero)
 800                 return 0;
 801
 802         if (mem_is_zero(io_u->buf, io_u->buflen))
 803                 return 0;
 804
 805         mem_is_zero_slow(io_u->buf, io_u->buflen, &offset);
 806
 807         log_err("trim: verify failed at file %s offset %llu, length %lu"
 808                 ", block offset %lu\n",
 809                         io_u->file->file_name, io_u->offset, io_u->buflen,
 810                         (unsigned long) offset);
 811         return EILSEQ;
 812 }
 813
 814 static int verify_header(struct io_u *io_u, struct thread_data *td,
 815                          struct verify_header *hdr, unsigned int hdr_num,
 816                          unsigned int hdr_len)
 817 {
 818         void *p = hdr;
 819         uint32_t crc;
 820
 821         if (hdr->magic != FIO_HDR_MAGIC) {
 822                 log_err("verify: bad magic header %x, wanted %x",
 823                         hdr->magic, FIO_HDR_MAGIC);
 824                 goto err;
 825         }
 826         if (hdr->len != hdr_len) {
 827                 log_err("verify: bad header length %u, wanted %u",
 828                         hdr->len, hdr_len);
 829                 goto err;
 830         }
 831         if (hdr->rand_seed != io_u->rand_seed) {
 832                 log_err("verify: bad header rand_seed %"PRIu64
 833                         ", wanted %"PRIu64,
 834                         hdr->rand_seed, io_u->rand_seed);
 835                 goto err;
 836         }
 837         if (hdr->offset != io_u->offset + hdr_num * td->o.verify_interval) {
 838                 log_err("verify: bad header offset %"PRIu64
 839                         ", wanted %llu",
 840                         hdr->offset, io_u->offset);
 841                 goto err;
 842         }
 843
 844         /*
 845          * For read-only workloads, the program cannot be certain of the
 846          * last numberio written to a block. Checking of numberio will be
 847          * done only for workloads that write data.  For verify_only,
 848          * numberio will be checked in the last iteration when the correct
 849          * state of numberio, that would have been written to each block
 850          * in a previous run of fio, has been reached.
 851          */
 852         if (td_write(td) && (td_min_bs(td) == td_max_bs(td)) &&
 853             !td->o.time_based)
 854                 if (!td->o.verify_only || td->o.loops == 0)
 855                         if (hdr->numberio != io_u->numberio) {
 856                                 log_err("verify: bad header numberio %"PRIu16
 857                                         ", wanted %"PRIu16,
 858                                         hdr->numberio, io_u->numberio);
 859                                 goto err;
 860                         }
 861
 862         crc = fio_crc32c(p, offsetof(struct verify_header, crc32));
 863         if (crc != hdr->crc32) {
 864                 log_err("verify: bad header crc %x, calculated %x",
 865                         hdr->crc32, crc);
 866                 goto err;
 867         }
 868         return 0;
 869
 870 err:
 871         log_err(" at file %s offset %llu, length %u\n",
 872                 io_u->file->file_name,
 873                 io_u->offset + hdr_num * hdr_len, hdr_len);
 874
 875         if (td->o.verify_dump)
 876                 dump_buf(p, hdr_len, io_u->offset + hdr_num * hdr_len,
 877                                 "hdr_fail", io_u->file);
 878
 879         return EILSEQ;
 880 }
 881
 882 int verify_io_u(struct thread_data *td, struct io_u **io_u_ptr)
 883 {
 884         struct verify_header *hdr;
 885         struct io_u *io_u = *io_u_ptr;
 886         unsigned int header_size, hdr_inc, hdr_num = 0;
 887         void *p;
 888         int ret;
 889
 890         if (td->o.verify == VERIFY_NULL || io_u->ddir != DDIR_READ)
 891                 return 0;
 892         /*
 893          * If the IO engine is faking IO (like null), then just pretend
 894          * we verified everything.
 895          */
 896         if (td_ioengine_flagged(td, FIO_FAKEIO))
 897                 return 0;
 898
 899         if (io_u->flags & IO_U_F_TRIMMED) {
 900                 ret = verify_trimmed_io_u(td, io_u);
 901                 goto done;
 902         }
 903
 904         hdr_inc = get_hdr_inc(td, io_u);
 905
 906         ret = 0;
 907         for (p = io_u->buf; p < io_u->buf + io_u->buflen;
 908              p += hdr_inc, hdr_num++) {
 909                 struct vcont vc = {
 910                         .io_u           = io_u,
 911                         .hdr_num        = hdr_num,
 912                         .td             = td,
 913                 };
 914                 unsigned int verify_type;
 915
 916                 if (ret && td->o.verify_fatal)
 917                         break;
 918
 919                 header_size = __hdr_size(td->o.verify);
 920                 if (td->o.verify_offset)
 921                         memswp(p, p + td->o.verify_offset, header_size);
 922                 hdr = p;
 923
 924                 /*
 925                  * Make rand_seed check pass when have verifysort or
 926                  * verify_backlog.
 927                  */
 928                 if (td->o.verifysort || (td->flags & TD_F_VER_BACKLOG))
 929                         io_u->rand_seed = hdr->rand_seed;
 930
 931                 if (td->o.verify != VERIFY_PATTERN_NO_HDR) {
 932                         ret = verify_header(io_u, td, hdr, hdr_num, hdr_inc);
 933                         if (ret)
 934                                 return ret;
 935                 }
 936
 937                 if (td->o.verify != VERIFY_NONE)
 938                         verify_type = td->o.verify;
 939                 else
 940                         verify_type = hdr->verify_type;
 941
 942                 switch (verify_type) {
 943                 case VERIFY_HDR_ONLY:
 944                         /* Header is always verified, check if pattern is left
 945                          * for verification. */
 946                         if (td->o.verify_pattern_bytes)
 947                                 ret = verify_io_u_pattern(hdr, &vc);
 948                         break;
 949                 case VERIFY_MD5:
 950                         ret = verify_io_u_md5(hdr, &vc);
 951                         break;
 952                 case VERIFY_CRC64:
 953                         ret = verify_io_u_crc64(hdr, &vc);
 954                         break;
 955                 case VERIFY_CRC32C:
 956                 case VERIFY_CRC32C_INTEL:
 957                         ret = verify_io_u_crc32c(hdr, &vc);
 958                         break;
 959                 case VERIFY_CRC32:
 960                         ret = verify_io_u_crc32(hdr, &vc);
 961                         break;
 962                 case VERIFY_CRC16:
 963                         ret = verify_io_u_crc16(hdr, &vc);
 964                         break;
 965                 case VERIFY_CRC7:
 966                         ret = verify_io_u_crc7(hdr, &vc);
 967                         break;
 968                 case VERIFY_SHA256:
 969                         ret = verify_io_u_sha256(hdr, &vc);
 970                         break;
 971                 case VERIFY_SHA512:
 972                         ret = verify_io_u_sha512(hdr, &vc);
 973                         break;
 974                 case VERIFY_SHA3_224:
 975                         ret = verify_io_u_sha3_224(hdr, &vc);
 976                         break;
 977                 case VERIFY_SHA3_256:
 978                         ret = verify_io_u_sha3_256(hdr, &vc);
 979                         break;
 980                 case VERIFY_SHA3_384:
 981                         ret = verify_io_u_sha3_384(hdr, &vc);
 982                         break;
 983                 case VERIFY_SHA3_512:
 984                         ret = verify_io_u_sha3_512(hdr, &vc);
 985                         break;
 986                 case VERIFY_XXHASH:
 987                         ret = verify_io_u_xxhash(hdr, &vc);
 988                         break;
 989                 case VERIFY_SHA1:
 990                         ret = verify_io_u_sha1(hdr, &vc);
 991                         break;
 992                 case VERIFY_PATTERN:
 993                 case VERIFY_PATTERN_NO_HDR:
 994                         ret = verify_io_u_pattern(hdr, &vc);
 995                         break;
 996                 default:
 997                         log_err("Bad verify type %u\n", hdr->verify_type);
 998                         ret = EINVAL;
 999                 }
1000
1001                 if (ret && verify_type != hdr->verify_type)
1002                         log_err("fio: verify type mismatch (%u media, %u given)\n",
1003                                         hdr->verify_type, verify_type);
1004         }
1005
1006 done:
1007         if (ret && td->o.verify_fatal)
1008                 fio_mark_td_terminate(td);
1009
1010         return ret;
1011 }
1012
1013 static void fill_xxhash(struct verify_header *hdr, void *p, unsigned int len)
1014 {
1015         struct vhdr_xxhash *vh = hdr_priv(hdr);
1016         void *state;
1017
1018         state = XXH32_init(1);
1019         XXH32_update(state, p, len);
1020         vh->hash = XXH32_digest(state);
1021 }
1022
1023 static void fill_sha3(struct fio_sha3_ctx *sha3_ctx, void *p, unsigned int len)
1024 {
1025         fio_sha3_update(sha3_ctx, p, len);
1026         fio_sha3_final(sha3_ctx);
1027 }
1028
1029 static void fill_sha3_224(struct verify_header *hdr, void *p, unsigned int len)
1030 {
1031         struct vhdr_sha3_224 *vh = hdr_priv(hdr);
1032         struct fio_sha3_ctx sha3_ctx = {
1033                 .sha = vh->sha,
1034         };
1035
1036         fio_sha3_224_init(&sha3_ctx);
1037         fill_sha3(&sha3_ctx, p, len);
1038 }
1039
1040 static void fill_sha3_256(struct verify_header *hdr, void *p, unsigned int len)
1041 {
1042         struct vhdr_sha3_256 *vh = hdr_priv(hdr);
1043         struct fio_sha3_ctx sha3_ctx = {
1044                 .sha = vh->sha,
1045         };
1046
1047         fio_sha3_256_init(&sha3_ctx);
1048         fill_sha3(&sha3_ctx, p, len);
1049 }
1050
1051 static void fill_sha3_384(struct verify_header *hdr, void *p, unsigned int len)
1052 {
1053         struct vhdr_sha3_384 *vh = hdr_priv(hdr);
1054         struct fio_sha3_ctx sha3_ctx = {
1055                 .sha = vh->sha,
1056         };
1057
1058         fio_sha3_384_init(&sha3_ctx);
1059         fill_sha3(&sha3_ctx, p, len);
1060 }
1061
1062 static void fill_sha3_512(struct verify_header *hdr, void *p, unsigned int len)
1063 {
1064         struct vhdr_sha3_512 *vh = hdr_priv(hdr);
1065         struct fio_sha3_ctx sha3_ctx = {
1066                 .sha = vh->sha,
1067         };
1068
1069         fio_sha3_512_init(&sha3_ctx);
1070         fill_sha3(&sha3_ctx, p, len);
1071 }
1072
1073 static void fill_sha512(struct verify_header *hdr, void *p, unsigned int len)
1074 {
1075         struct vhdr_sha512 *vh = hdr_priv(hdr);
1076         struct fio_sha512_ctx sha512_ctx = {
1077                 .buf = vh->sha512,
1078         };
1079
1080         fio_sha512_init(&sha512_ctx);
1081         fio_sha512_update(&sha512_ctx, p, len);
1082 }
1083
1084 static void fill_sha256(struct verify_header *hdr, void *p, unsigned int len)
1085 {
1086         struct vhdr_sha256 *vh = hdr_priv(hdr);
1087         struct fio_sha256_ctx sha256_ctx = {
1088                 .buf = vh->sha256,
1089         };
1090
1091         fio_sha256_init(&sha256_ctx);
1092         fio_sha256_update(&sha256_ctx, p, len);
1093         fio_sha256_final(&sha256_ctx);
1094 }
1095
1096 static void fill_sha1(struct verify_header *hdr, void *p, unsigned int len)
1097 {
1098         struct vhdr_sha1 *vh = hdr_priv(hdr);
1099         struct fio_sha1_ctx sha1_ctx = {
1100                 .H = vh->sha1,
1101         };
1102
1103         fio_sha1_init(&sha1_ctx);
1104         fio_sha1_update(&sha1_ctx, p, len);
1105         fio_sha1_final(&sha1_ctx);
1106 }
1107
1108 static void fill_crc7(struct verify_header *hdr, void *p, unsigned int len)
1109 {
1110         struct vhdr_crc7 *vh = hdr_priv(hdr);
1111
1112         vh->crc7 = fio_crc7(p, len);
1113 }
1114
1115 static void fill_crc16(struct verify_header *hdr, void *p, unsigned int len)
1116 {
1117         struct vhdr_crc16 *vh = hdr_priv(hdr);
1118
1119         vh->crc16 = fio_crc16(p, len);
1120 }
1121
1122 static void fill_crc32(struct verify_header *hdr, void *p, unsigned int len)
1123 {
1124         struct vhdr_crc32 *vh = hdr_priv(hdr);
1125
1126         vh->crc32 = fio_crc32(p, len);
1127 }
1128
1129 static void fill_crc32c(struct verify_header *hdr, void *p, unsigned int len)
1130 {
1131         struct vhdr_crc32 *vh = hdr_priv(hdr);
1132
1133         vh->crc32 = fio_crc32c(p, len);
1134 }
1135
1136 static void fill_crc64(struct verify_header *hdr, void *p, unsigned int len)
1137 {
1138         struct vhdr_crc64 *vh = hdr_priv(hdr);
1139
1140         vh->crc64 = fio_crc64(p, len);
1141 }
1142
1143 static void fill_md5(struct verify_header *hdr, void *p, unsigned int len)
1144 {
1145         struct vhdr_md5 *vh = hdr_priv(hdr);
1146         struct fio_md5_ctx md5_ctx = {
1147                 .hash = (uint32_t *) vh->md5_digest,
1148         };
1149
1150         fio_md5_init(&md5_ctx);
1151         fio_md5_update(&md5_ctx, p, len);
1152         fio_md5_final(&md5_ctx);
1153 }
1154
1155 static void __fill_hdr(struct thread_data *td, struct io_u *io_u,
1156                        struct verify_header *hdr, unsigned int header_num,
1157                        unsigned int header_len, uint64_t rand_seed)
1158 {
1159         void *p = hdr;
1160
1161         hdr->magic = FIO_HDR_MAGIC;
1162         hdr->verify_type = td->o.verify;
1163         hdr->len = header_len;
1164         hdr->rand_seed = rand_seed;
1165         hdr->offset = io_u->offset + header_num * td->o.verify_interval;
1166         hdr->time_sec = io_u->start_time.tv_sec;
1167         hdr->time_nsec = io_u->start_time.tv_nsec;
1168         hdr->thread = td->thread_number;
1169         hdr->numberio = io_u->numberio;
1170         hdr->crc32 = fio_crc32c(p, offsetof(struct verify_header, crc32));
1171 }
1172
1173
1174 static void fill_hdr(struct thread_data *td, struct io_u *io_u,
1175                      struct verify_header *hdr, unsigned int header_num,
1176                      unsigned int header_len, uint64_t rand_seed)
1177 {
1178
1179         if (td->o.verify != VERIFY_PATTERN_NO_HDR)
1180                 __fill_hdr(td, io_u, hdr, header_num, header_len, rand_seed);
1181 }
1182
1183 static void populate_hdr(struct thread_data *td, struct io_u *io_u,
1184                          struct verify_header *hdr, unsigned int header_num,
1185                          unsigned int header_len)
1186 {
1187         unsigned int data_len;
1188         void *data;
1189         char *p;
1190
1191         p = (char *) hdr;
1192
1193         fill_hdr(td, io_u, hdr, header_num, header_len, io_u->rand_seed);
1194
1195         data_len = header_len - hdr_size(td, hdr);
1196
1197         data = p + hdr_size(td, hdr);
1198         switch (td->o.verify) {
1199         case VERIFY_MD5:
1200                 dprint(FD_VERIFY, "fill md5 io_u %p, len %u\n",
1201                                                 io_u, hdr->len);
1202                 fill_md5(hdr, data, data_len);
1203                 break;
1204         case VERIFY_CRC64:
1205                 dprint(FD_VERIFY, "fill crc64 io_u %p, len %u\n",
1206                                                 io_u, hdr->len);
1207                 fill_crc64(hdr, data, data_len);
1208                 break;
1209         case VERIFY_CRC32C:
1210         case VERIFY_CRC32C_INTEL:
1211                 dprint(FD_VERIFY, "fill crc32c io_u %p, len %u\n",
1212                                                 io_u, hdr->len);
1213                 fill_crc32c(hdr, data, data_len);
1214                 break;
1215         case VERIFY_CRC32:
1216                 dprint(FD_VERIFY, "fill crc32 io_u %p, len %u\n",
1217                                                 io_u, hdr->len);
1218                 fill_crc32(hdr, data, data_len);
1219                 break;
1220         case VERIFY_CRC16:
1221                 dprint(FD_VERIFY, "fill crc16 io_u %p, len %u\n",
1222                                                 io_u, hdr->len);
1223                 fill_crc16(hdr, data, data_len);
1224                 break;
1225         case VERIFY_CRC7:
1226                 dprint(FD_VERIFY, "fill crc7 io_u %p, len %u\n",
1227                                                 io_u, hdr->len);
1228                 fill_crc7(hdr, data, data_len);
1229                 break;
1230         case VERIFY_SHA256:
1231                 dprint(FD_VERIFY, "fill sha256 io_u %p, len %u\n",
1232                                                 io_u, hdr->len);
1233                 fill_sha256(hdr, data, data_len);
1234                 break;
1235         case VERIFY_SHA512:
1236                 dprint(FD_VERIFY, "fill sha512 io_u %p, len %u\n",
1237                                                 io_u, hdr->len);
1238                 fill_sha512(hdr, data, data_len);
1239                 break;
1240         case VERIFY_SHA3_224:
1241                 dprint(FD_VERIFY, "fill sha3-224 io_u %p, len %u\n",
1242                                                 io_u, hdr->len);
1243                 fill_sha3_224(hdr, data, data_len);
1244                 break;
1245         case VERIFY_SHA3_256:
1246                 dprint(FD_VERIFY, "fill sha3-256 io_u %p, len %u\n",
1247                                                 io_u, hdr->len);
1248                 fill_sha3_256(hdr, data, data_len);
1249                 break;
1250         case VERIFY_SHA3_384:
1251                 dprint(FD_VERIFY, "fill sha3-384 io_u %p, len %u\n",
1252                                                 io_u, hdr->len);
1253                 fill_sha3_384(hdr, data, data_len);
1254                 break;
1255         case VERIFY_SHA3_512:
1256                 dprint(FD_VERIFY, "fill sha3-512 io_u %p, len %u\n",
1257                                                 io_u, hdr->len);
1258                 fill_sha3_512(hdr, data, data_len);
1259                 break;
1260         case VERIFY_XXHASH:
1261                 dprint(FD_VERIFY, "fill xxhash io_u %p, len %u\n",
1262                                                 io_u, hdr->len);
1263                 fill_xxhash(hdr, data, data_len);
1264                 break;
1265         case VERIFY_SHA1:
1266                 dprint(FD_VERIFY, "fill sha1 io_u %p, len %u\n",
1267                                                 io_u, hdr->len);
1268                 fill_sha1(hdr, data, data_len);
1269                 break;
1270         case VERIFY_HDR_ONLY:
1271         case VERIFY_PATTERN:
1272         case VERIFY_PATTERN_NO_HDR:
1273                 /* nothing to do here */
1274                 break;
1275         default:
1276                 log_err("fio: bad verify type: %d\n", td->o.verify);
1277                 assert(0);
1278         }
1279
1280         if (td->o.verify_offset && hdr_size(td, hdr))
1281                 memswp(p, p + td->o.verify_offset, hdr_size(td, hdr));
1282 }
1283
1284 /*
1285  * fill body of io_u->buf with random data and add a header with the
1286  * checksum of choice
1287  */
1288 void populate_verify_io_u(struct thread_data *td, struct io_u *io_u)
1289 {
1290         if (td->o.verify == VERIFY_NULL)
1291                 return;
1292
1293         io_u->numberio = td->io_issues[io_u->ddir];
1294
1295         fill_pattern_headers(td, io_u, 0, 0);
1296 }
1297
1298 int get_next_verify(struct thread_data *td, struct io_u *io_u)
1299 {
1300         struct io_piece *ipo = NULL;
1301
1302         /*
1303          * this io_u is from a requeue, we already filled the offsets
1304          */
1305         if (io_u->file)
1306                 return 0;
1307
1308         if (!RB_EMPTY_ROOT(&td->io_hist_tree)) {
1309                 struct rb_node *n = rb_first(&td->io_hist_tree);
1310
1311                 ipo = rb_entry(n, struct io_piece, rb_node);
1312
1313                 /*
1314                  * Ensure that the associated IO has completed
1315                  */
1316                 read_barrier();
1317                 if (ipo->flags & IP_F_IN_FLIGHT)
1318                         goto nothing;
1319
1320                 rb_erase(n, &td->io_hist_tree);
1321                 assert(ipo->flags & IP_F_ONRB);
1322                 ipo->flags &= ~IP_F_ONRB;
1323         } else if (!flist_empty(&td->io_hist_list)) {
1324                 ipo = flist_first_entry(&td->io_hist_list, struct io_piece, list);
1325
1326                 /*
1327                  * Ensure that the associated IO has completed
1328                  */
1329                 read_barrier();
1330                 if (ipo->flags & IP_F_IN_FLIGHT)
1331                         goto nothing;
1332
1333                 flist_del(&ipo->list);
1334                 assert(ipo->flags & IP_F_ONLIST);
1335                 ipo->flags &= ~IP_F_ONLIST;
1336         }
1337
1338         if (ipo) {
1339                 td->io_hist_len--;
1340
1341                 io_u->offset = ipo->offset;
1342                 io_u->buflen = ipo->len;
1343                 io_u->numberio = ipo->numberio;
1344                 io_u->file = ipo->file;
1345                 io_u_set(td, io_u, IO_U_F_VER_LIST);
1346
1347                 if (ipo->flags & IP_F_TRIMMED)
1348                         io_u_set(td, io_u, IO_U_F_TRIMMED);
1349
1350                 if (!fio_file_open(io_u->file)) {
1351                         int r = td_io_open_file(td, io_u->file);
1352
1353                         if (r) {
1354                                 dprint(FD_VERIFY, "failed file %s open\n",
1355                                                 io_u->file->file_name);
1356                                 return 1;
1357                         }
1358                 }
1359
1360                 get_file(ipo->file);
1361                 assert(fio_file_open(io_u->file));
1362                 io_u->ddir = DDIR_READ;
1363                 io_u->xfer_buf = io_u->buf;
1364                 io_u->xfer_buflen = io_u->buflen;
1365
1366                 remove_trim_entry(td, ipo);
1367                 free(ipo);
1368                 dprint(FD_VERIFY, "get_next_verify: ret io_u %p\n", io_u);
1369
1370                 if (!td->o.verify_pattern_bytes) {
1371                         io_u->rand_seed = __rand(&td->verify_state);
1372                         if (sizeof(int) != sizeof(long *))
1373                                 io_u->rand_seed *= __rand(&td->verify_state);
1374                 }
1375                 return 0;
1376         }
1377
1378 nothing:
1379         dprint(FD_VERIFY, "get_next_verify: empty\n");
1380         return 1;
1381 }
1382
1383 void fio_verify_init(struct thread_data *td)
1384 {
1385         if (td->o.verify == VERIFY_CRC32C_INTEL ||
1386             td->o.verify == VERIFY_CRC32C) {
1387                 crc32c_arm64_probe();
1388                 crc32c_intel_probe();
1389         }
1390 }
1391
1392 static void *verify_async_thread(void *data)
1393 {
1394         struct thread_data *td = data;
1395         struct io_u *io_u;
1396         int ret = 0;
1397
1398         if (fio_option_is_set(&td->o, verify_cpumask) &&
1399             fio_setaffinity(td->pid, td->o.verify_cpumask)) {
1400                 log_err("fio: failed setting verify thread affinity\n");
1401                 goto done;
1402         }
1403
1404         do {
1405                 FLIST_HEAD(list);
1406
1407                 read_barrier();
1408                 if (td->verify_thread_exit)
1409                         break;
1410
1411                 pthread_mutex_lock(&td->io_u_lock);
1412
1413                 while (flist_empty(&td->verify_list) &&
1414                        !td->verify_thread_exit) {
1415                         ret = pthread_cond_wait(&td->verify_cond,
1416                                                         &td->io_u_lock);
1417                         if (ret) {
1418                                 pthread_mutex_unlock(&td->io_u_lock);
1419                                 break;
1420                         }
1421                 }
1422
1423                 flist_splice_init(&td->verify_list, &list);
1424                 pthread_mutex_unlock(&td->io_u_lock);
1425
1426                 if (flist_empty(&list))
1427                         continue;
1428
1429                 while (!flist_empty(&list)) {
1430                         io_u = flist_first_entry(&list, struct io_u, verify_list);
1431                         flist_del_init(&io_u->verify_list);
1432
1433                         io_u_set(td, io_u, IO_U_F_NO_FILE_PUT);
1434                         ret = verify_io_u(td, &io_u);
1435
1436                         put_io_u(td, io_u);
1437                         if (!ret)
1438                                 continue;
1439                         if (td_non_fatal_error(td, ERROR_TYPE_VERIFY_BIT, ret)) {
1440                                 update_error_count(td, ret);
1441                                 td_clear_error(td);
1442                                 ret = 0;
1443                         }
1444                 }
1445         } while (!ret);
1446
1447         if (ret) {
1448                 td_verror(td, ret, "async_verify");
1449                 if (td->o.verify_fatal)
1450                         fio_mark_td_terminate(td);
1451         }
1452
1453 done:
1454         pthread_mutex_lock(&td->io_u_lock);
1455         td->nr_verify_threads--;
1456         pthread_mutex_unlock(&td->io_u_lock);
1457
1458         pthread_cond_signal(&td->free_cond);
1459         return NULL;
1460 }
1461
1462 int verify_async_init(struct thread_data *td)
1463 {
1464         int i, ret;
1465         pthread_attr_t attr;
1466
1467         pthread_attr_init(&attr);
1468         pthread_attr_setstacksize(&attr, 2 * PTHREAD_STACK_MIN);
1469
1470         td->verify_thread_exit = 0;
1471
1472         td->verify_threads = malloc(sizeof(pthread_t) * td->o.verify_async);
1473         for (i = 0; i < td->o.verify_async; i++) {
1474                 ret = pthread_create(&td->verify_threads[i], &attr,
1475                                         verify_async_thread, td);
1476                 if (ret) {
1477                         log_err("fio: async verify creation failed: %s\n",
1478                                         strerror(ret));
1479                         break;
1480                 }
1481                 ret = pthread_detach(td->verify_threads[i]);
1482                 if (ret) {
1483                         log_err("fio: async verify thread detach failed: %s\n",
1484                                         strerror(ret));
1485                         break;
1486                 }
1487                 td->nr_verify_threads++;
1488         }
1489
1490         pthread_attr_destroy(&attr);
1491
1492         if (i != td->o.verify_async) {
1493                 log_err("fio: only %d verify threads started, exiting\n", i);
1494                 td->verify_thread_exit = 1;
1495                 write_barrier();
1496                 pthread_cond_broadcast(&td->verify_cond);
1497                 return 1;
1498         }
1499
1500         return 0;
1501 }
1502
1503 void verify_async_exit(struct thread_data *td)
1504 {
1505         td->verify_thread_exit = 1;
1506         write_barrier();
1507         pthread_cond_broadcast(&td->verify_cond);
1508
1509         pthread_mutex_lock(&td->io_u_lock);
1510
1511         while (td->nr_verify_threads)
1512                 pthread_cond_wait(&td->free_cond, &td->io_u_lock);
1513
1514         pthread_mutex_unlock(&td->io_u_lock);
1515         free(td->verify_threads);
1516         td->verify_threads = NULL;
1517 }
1518
1519 int paste_blockoff(char *buf, unsigned int len, void *priv)
1520 {
1521         struct io_u *io = priv;
1522         unsigned long long off;
1523
1524         typecheck(typeof(off), io->offset);
1525         off = cpu_to_le64((uint64_t)io->offset);
1526         len = min(len, (unsigned int)sizeof(off));
1527         memcpy(buf, &off, len);
1528         return 0;
1529 }
1530
1531 static int __fill_file_completions(struct thread_data *td,
1532                                    struct thread_io_list *s,
1533                                    struct fio_file *f, unsigned int *index)
1534 {
1535         unsigned int comps;
1536         int i, j;
1537
1538         if (!f->last_write_comp)
1539                 return 0;
1540
1541         if (td->io_blocks[DDIR_WRITE] < td->o.iodepth)
1542                 comps = td->io_blocks[DDIR_WRITE];
1543         else
1544                 comps = td->o.iodepth;
1545
1546         j = f->last_write_idx - 1;
1547         for (i = 0; i < comps; i++) {
1548                 if (j == -1)
1549                         j = td->o.iodepth - 1;
1550                 s->comps[*index].fileno = __cpu_to_le64(f->fileno);
1551                 s->comps[*index].offset = cpu_to_le64(f->last_write_comp[j]);
1552                 (*index)++;
1553                 j--;
1554         }
1555
1556         return comps;
1557 }
1558
1559 static int fill_file_completions(struct thread_data *td,
1560                                  struct thread_io_list *s, unsigned int *index)
1561 {
1562         struct fio_file *f;
1563         unsigned int i;
1564         int comps = 0;
1565
1566         for_each_file(td, f, i)
1567                 comps += __fill_file_completions(td, s, f, index);
1568
1569         return comps;
1570 }
1571
1572 struct all_io_list *get_all_io_list(int save_mask, size_t *sz)
1573 {
1574         struct all_io_list *rep;
1575         struct thread_data *td;
1576         size_t depth;
1577         void *next;
1578         int i, nr;
1579
1580         compiletime_assert(sizeof(struct all_io_list) == 8, "all_io_list");
1581
1582         /*
1583          * Calculate reply space needed. We need one 'io_state' per thread,
1584          * and the size will vary depending on depth.
1585          */
1586         depth = 0;
1587         nr = 0;
1588         for_each_td(td, i) {
1589                 if (save_mask != IO_LIST_ALL && (i + 1) != save_mask)
1590                         continue;
1591                 td->stop_io = 1;
1592                 td->flags |= TD_F_VSTATE_SAVED;
1593                 depth += (td->o.iodepth * td->o.nr_files);
1594                 nr++;
1595         }
1596
1597         if (!nr)
1598                 return NULL;
1599
1600         *sz = sizeof(*rep);
1601         *sz += nr * sizeof(struct thread_io_list);
1602         *sz += depth * sizeof(struct file_comp);
1603         rep = malloc(*sz);
1604         memset(rep, 0, *sz);
1605
1606         rep->threads = cpu_to_le64((uint64_t) nr);
1607
1608         next = &rep->state[0];
1609         for_each_td(td, i) {
1610                 struct thread_io_list *s = next;
1611                 unsigned int comps, index = 0;
1612
1613                 if (save_mask != IO_LIST_ALL && (i + 1) != save_mask)
1614                         continue;
1615
1616                 comps = fill_file_completions(td, s, &index);
1617
1618                 s->no_comps = cpu_to_le64((uint64_t) comps);
1619                 s->depth = cpu_to_le64((uint64_t) td->o.iodepth);
1620                 s->nofiles = cpu_to_le64((uint64_t) td->o.nr_files);
1621                 s->numberio = cpu_to_le64((uint64_t) td->io_issues[DDIR_WRITE]);
1622                 s->index = cpu_to_le64((uint64_t) i);
1623                 if (td->random_state.use64) {
1624                         s->rand.state64.s[0] = cpu_to_le64(td->random_state.state64.s1);
1625                         s->rand.state64.s[1] = cpu_to_le64(td->random_state.state64.s2);
1626                         s->rand.state64.s[2] = cpu_to_le64(td->random_state.state64.s3);
1627                         s->rand.state64.s[3] = cpu_to_le64(td->random_state.state64.s4);
1628                         s->rand.state64.s[4] = cpu_to_le64(td->random_state.state64.s5);
1629                         s->rand.state64.s[5] = 0;
1630                         s->rand.use64 = cpu_to_le64((uint64_t)1);
1631                 } else {
1632                         s->rand.state32.s[0] = cpu_to_le32(td->random_state.state32.s1);
1633                         s->rand.state32.s[1] = cpu_to_le32(td->random_state.state32.s2);
1634                         s->rand.state32.s[2] = cpu_to_le32(td->random_state.state32.s3);
1635                         s->rand.state32.s[3] = 0;
1636                         s->rand.use64 = 0;
1637                 }
1638                 s->name[sizeof(s->name) - 1] = '\0';
1639                 strncpy((char *) s->name, td->o.name, sizeof(s->name) - 1);
1640                 next = io_list_next(s);
1641         }
1642
1643         return rep;
1644 }
1645
1646 static int open_state_file(const char *name, const char *prefix, int num,
1647                            int for_write)
1648 {
1649         char out[PATH_MAX];
1650         int flags;
1651         int fd;
1652
1653         if (for_write)
1654                 flags = O_CREAT | O_TRUNC | O_WRONLY | O_SYNC;
1655         else
1656                 flags = O_RDONLY;
1657
1658         verify_state_gen_name(out, sizeof(out), name, prefix, num);
1659
1660         fd = open(out, flags, 0644);
1661         if (fd == -1) {
1662                 perror("fio: open state file");
1663                 log_err("fio: state file: %s (for_write=%d)\n", out, for_write);
1664                 return -1;
1665         }
1666
1667         return fd;
1668 }
1669
1670 static int write_thread_list_state(struct thread_io_list *s,
1671                                    const char *prefix)
1672 {
1673         struct verify_state_hdr hdr;
1674         uint64_t crc;
1675         ssize_t ret;
1676         int fd;
1677
1678         fd = open_state_file((const char *) s->name, prefix, s->index, 1);
1679         if (fd == -1)
1680                 return 1;
1681
1682         crc = fio_crc32c((void *)s, thread_io_list_sz(s));
1683
1684         hdr.version = cpu_to_le64((uint64_t) VSTATE_HDR_VERSION);
1685         hdr.size = cpu_to_le64((uint64_t) thread_io_list_sz(s));
1686         hdr.crc = cpu_to_le64(crc);
1687         ret = write(fd, &hdr, sizeof(hdr));
1688         if (ret != sizeof(hdr))
1689                 goto write_fail;
1690
1691         ret = write(fd, s, thread_io_list_sz(s));
1692         if (ret != thread_io_list_sz(s)) {
1693 write_fail:
1694                 if (ret < 0)
1695                         perror("fio: write state file");
1696                 log_err("fio: failed to write state file\n");
1697                 ret = 1;
1698         } else
1699                 ret = 0;
1700
1701         close(fd);
1702         return ret;
1703 }
1704
1705 void __verify_save_state(struct all_io_list *state, const char *prefix)
1706 {
1707         struct thread_io_list *s = &state->state[0];
1708         unsigned int i;
1709
1710         for (i = 0; i < le64_to_cpu(state->threads); i++) {
1711                 write_thread_list_state(s,  prefix);
1712                 s = io_list_next(s);
1713         }
1714 }
1715
1716 void verify_save_state(int mask)
1717 {
1718         struct all_io_list *state;
1719         size_t sz;
1720
1721         state = get_all_io_list(mask, &sz);
1722         if (state) {
1723                 char prefix[PATH_MAX];
1724
1725                 if (aux_path)
1726                         sprintf(prefix, "%s%clocal", aux_path, FIO_OS_PATH_SEPARATOR);
1727                 else
1728                         strcpy(prefix, "local");
1729
1730                 __verify_save_state(state, prefix);
1731                 free(state);
1732         }
1733 }
1734
1735 void verify_free_state(struct thread_data *td)
1736 {
1737         if (td->vstate)
1738                 free(td->vstate);
1739 }
1740
1741 void verify_assign_state(struct thread_data *td, void *p)
1742 {
1743         struct thread_io_list *s = p;
1744         int i;
1745
1746         s->no_comps = le64_to_cpu(s->no_comps);
1747         s->depth = le32_to_cpu(s->depth);
1748         s->nofiles = le32_to_cpu(s->nofiles);
1749         s->numberio = le64_to_cpu(s->numberio);
1750         s->rand.use64 = le64_to_cpu(s->rand.use64);
1751
1752         if (s->rand.use64) {
1753                 for (i = 0; i < 6; i++)
1754                         s->rand.state64.s[i] = le64_to_cpu(s->rand.state64.s[i]);
1755         } else {
1756                 for (i = 0; i < 4; i++)
1757                         s->rand.state32.s[i] = le32_to_cpu(s->rand.state32.s[i]);
1758         }
1759
1760         for (i = 0; i < s->no_comps; i++) {
1761                 s->comps[i].fileno = le64_to_cpu(s->comps[i].fileno);
1762                 s->comps[i].offset = le64_to_cpu(s->comps[i].offset);
1763         }
1764
1765         td->vstate = p;
1766 }
1767
1768 int verify_state_hdr(struct verify_state_hdr *hdr, struct thread_io_list *s)
1769 {
1770         uint64_t crc;
1771
1772         hdr->version = le64_to_cpu(hdr->version);
1773         hdr->size = le64_to_cpu(hdr->size);
1774         hdr->crc = le64_to_cpu(hdr->crc);
1775
1776         if (hdr->version != VSTATE_HDR_VERSION)
1777                 return 1;
1778
1779         crc = fio_crc32c((void *)s, hdr->size);
1780         if (crc != hdr->crc)
1781                 return 1;
1782
1783         return 0;
1784 }
1785
1786 int verify_load_state(struct thread_data *td, const char *prefix)
1787 {
1788         struct verify_state_hdr hdr;
1789         void *s = NULL;
1790         uint64_t crc;
1791         ssize_t ret;
1792         int fd;
1793
1794         if (!td->o.verify_state)
1795                 return 0;
1796
1797         fd = open_state_file(td->o.name, prefix, td->thread_number - 1, 0);
1798         if (fd == -1)
1799                 return 1;
1800
1801         ret = read(fd, &hdr, sizeof(hdr));
1802         if (ret != sizeof(hdr)) {
1803                 if (ret < 0)
1804                         td_verror(td, errno, "read verify state hdr");
1805                 log_err("fio: failed reading verify state header\n");
1806                 goto err;
1807         }
1808
1809         hdr.version = le64_to_cpu(hdr.version);
1810         hdr.size = le64_to_cpu(hdr.size);
1811         hdr.crc = le64_to_cpu(hdr.crc);
1812
1813         if (hdr.version != VSTATE_HDR_VERSION) {
1814                 log_err("fio: unsupported (%d) version in verify state header\n",
1815                                 (unsigned int) hdr.version);
1816                 goto err;
1817         }
1818
1819         s = malloc(hdr.size);
1820         ret = read(fd, s, hdr.size);
1821         if (ret != hdr.size) {
1822                 if (ret < 0)
1823                         td_verror(td, errno, "read verify state");
1824                 log_err("fio: failed reading verity state\n");
1825                 goto err;
1826         }
1827
1828         crc = fio_crc32c(s, hdr.size);
1829         if (crc != hdr.crc) {
1830                 log_err("fio: verify state is corrupt\n");
1831                 goto err;
1832         }
1833
1834         close(fd);
1835
1836         verify_assign_state(td, s);
1837         return 0;
1838 err:
1839         if (s)
1840                 free(s);
1841         close(fd);
1842         return 1;
1843 }
1844
1845 /*
1846  * Use the loaded verify state to know when to stop doing verification
1847  */
1848 int verify_state_should_stop(struct thread_data *td, struct io_u *io_u)
1849 {
1850         struct thread_io_list *s = td->vstate;
1851         struct fio_file *f = io_u->file;
1852         int i;
1853
1854         if (!s || !f)
1855                 return 0;
1856
1857         /*
1858          * If we're not into the window of issues - depth yet, continue. If
1859          * issue is shorter than depth, do check.
1860          */
1861         if ((td->io_blocks[DDIR_READ] < s->depth ||
1862             s->numberio - td->io_blocks[DDIR_READ] > s->depth) &&
1863             s->numberio > s->depth)
1864                 return 0;
1865
1866         /*
1867          * We're in the window of having to check if this io was
1868          * completed or not. If the IO was seen as completed, then
1869          * lets verify it.
1870          */
1871         for (i = 0; i < s->no_comps; i++) {
1872                 if (s->comps[i].fileno != f->fileno)
1873                         continue;
1874                 if (io_u->offset == s->comps[i].offset)
1875                         return 0;
1876         }
1877
1878         /*
1879          * Not found, we have to stop
1880          */
1881         return 1;
1882 }