| 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 "smalloc.h" |
| 14 | #include "trim.h" |
| 15 | #include "lib/rand.h" |
| 16 | |
| 17 | #include "crc/md5.h" |
| 18 | #include "crc/crc64.h" |
| 19 | #include "crc/crc32.h" |
| 20 | #include "crc/crc32c.h" |
| 21 | #include "crc/crc16.h" |
| 22 | #include "crc/crc7.h" |
| 23 | #include "crc/sha256.h" |
| 24 | #include "crc/sha512.h" |
| 25 | #include "crc/sha1.h" |
| 26 | |
| 27 | static void populate_hdr(struct thread_data *td, struct io_u *io_u, |
| 28 | struct verify_header *hdr, unsigned int header_num, |
| 29 | unsigned int header_len); |
| 30 | |
| 31 | void fill_pattern(struct thread_data *td, void *p, unsigned int len, struct io_u *io_u, unsigned long seed, int use_seed) |
| 32 | { |
| 33 | switch (td->o.verify_pattern_bytes) { |
| 34 | case 0: |
| 35 | dprint(FD_VERIFY, "fill random bytes len=%u\n", len); |
| 36 | if (use_seed) |
| 37 | __fill_random_buf(p, len, seed); |
| 38 | else |
| 39 | io_u->rand_seed = fill_random_buf(&td->buf_state, p, len); |
| 40 | break; |
| 41 | case 1: |
| 42 | if (io_u->buf_filled_len >= len) { |
| 43 | dprint(FD_VERIFY, "using already filled verify pattern b=0 len=%u\n", len); |
| 44 | return; |
| 45 | } |
| 46 | dprint(FD_VERIFY, "fill verify pattern b=0 len=%u\n", len); |
| 47 | memset(p, td->o.verify_pattern[0], len); |
| 48 | io_u->buf_filled_len = len; |
| 49 | break; |
| 50 | default: { |
| 51 | unsigned int i = 0, size = 0; |
| 52 | unsigned char *b = p; |
| 53 | |
| 54 | if (io_u->buf_filled_len >= len) { |
| 55 | dprint(FD_VERIFY, "using already filled verify pattern b=%d len=%u\n", |
| 56 | td->o.verify_pattern_bytes, len); |
| 57 | return; |
| 58 | } |
| 59 | |
| 60 | dprint(FD_VERIFY, "fill verify pattern b=%d len=%u\n", |
| 61 | td->o.verify_pattern_bytes, len); |
| 62 | |
| 63 | while (i < len) { |
| 64 | size = td->o.verify_pattern_bytes; |
| 65 | if (size > (len - i)) |
| 66 | size = len - i; |
| 67 | memcpy(b+i, td->o.verify_pattern, size); |
| 68 | i += size; |
| 69 | } |
| 70 | io_u->buf_filled_len = len; |
| 71 | break; |
| 72 | } |
| 73 | } |
| 74 | } |
| 75 | |
| 76 | static unsigned int get_hdr_inc(struct thread_data *td, struct io_u *io_u) |
| 77 | { |
| 78 | unsigned int hdr_inc; |
| 79 | |
| 80 | hdr_inc = io_u->buflen; |
| 81 | if (td->o.verify_interval && td->o.verify_interval <= io_u->buflen) |
| 82 | hdr_inc = td->o.verify_interval; |
| 83 | |
| 84 | return hdr_inc; |
| 85 | } |
| 86 | |
| 87 | static void fill_pattern_headers(struct thread_data *td, struct io_u *io_u, |
| 88 | unsigned long seed, int use_seed) |
| 89 | { |
| 90 | unsigned int hdr_inc, header_num; |
| 91 | struct verify_header *hdr; |
| 92 | void *p = io_u->buf; |
| 93 | |
| 94 | fill_pattern(td, p, io_u->buflen, io_u, seed, use_seed); |
| 95 | |
| 96 | hdr_inc = get_hdr_inc(td, io_u); |
| 97 | header_num = 0; |
| 98 | for (; p < io_u->buf + io_u->buflen; p += hdr_inc) { |
| 99 | hdr = p; |
| 100 | populate_hdr(td, io_u, hdr, header_num, hdr_inc); |
| 101 | header_num++; |
| 102 | } |
| 103 | } |
| 104 | |
| 105 | static void memswp(void *buf1, void *buf2, unsigned int len) |
| 106 | { |
| 107 | char swap[200]; |
| 108 | |
| 109 | assert(len <= sizeof(swap)); |
| 110 | |
| 111 | memcpy(&swap, buf1, len); |
| 112 | memcpy(buf1, buf2, len); |
| 113 | memcpy(buf2, &swap, len); |
| 114 | } |
| 115 | |
| 116 | static void hexdump(void *buffer, int len) |
| 117 | { |
| 118 | unsigned char *p = buffer; |
| 119 | int i; |
| 120 | |
| 121 | for (i = 0; i < len; i++) |
| 122 | log_err("%02x", p[i]); |
| 123 | log_err("\n"); |
| 124 | } |
| 125 | |
| 126 | /* |
| 127 | * Prepare for seperation of verify_header and checksum header |
| 128 | */ |
| 129 | static inline unsigned int __hdr_size(int verify_type) |
| 130 | { |
| 131 | unsigned int len = 0; |
| 132 | |
| 133 | switch (verify_type) { |
| 134 | case VERIFY_NONE: |
| 135 | case VERIFY_NULL: |
| 136 | len = 0; |
| 137 | break; |
| 138 | case VERIFY_MD5: |
| 139 | len = sizeof(struct vhdr_md5); |
| 140 | break; |
| 141 | case VERIFY_CRC64: |
| 142 | len = sizeof(struct vhdr_crc64); |
| 143 | break; |
| 144 | case VERIFY_CRC32C: |
| 145 | case VERIFY_CRC32: |
| 146 | case VERIFY_CRC32C_INTEL: |
| 147 | len = sizeof(struct vhdr_crc32); |
| 148 | break; |
| 149 | case VERIFY_CRC16: |
| 150 | len = sizeof(struct vhdr_crc16); |
| 151 | break; |
| 152 | case VERIFY_CRC7: |
| 153 | len = sizeof(struct vhdr_crc7); |
| 154 | break; |
| 155 | case VERIFY_SHA256: |
| 156 | len = sizeof(struct vhdr_sha256); |
| 157 | break; |
| 158 | case VERIFY_SHA512: |
| 159 | len = sizeof(struct vhdr_sha512); |
| 160 | break; |
| 161 | case VERIFY_META: |
| 162 | len = sizeof(struct vhdr_meta); |
| 163 | break; |
| 164 | case VERIFY_SHA1: |
| 165 | len = sizeof(struct vhdr_sha1); |
| 166 | break; |
| 167 | case VERIFY_PATTERN: |
| 168 | len = 0; |
| 169 | break; |
| 170 | default: |
| 171 | log_err("fio: unknown verify header!\n"); |
| 172 | assert(0); |
| 173 | } |
| 174 | |
| 175 | return len + sizeof(struct verify_header); |
| 176 | } |
| 177 | |
| 178 | static inline unsigned int hdr_size(struct verify_header *hdr) |
| 179 | { |
| 180 | return __hdr_size(hdr->verify_type); |
| 181 | } |
| 182 | |
| 183 | static void *hdr_priv(struct verify_header *hdr) |
| 184 | { |
| 185 | void *priv = hdr; |
| 186 | |
| 187 | return priv + sizeof(struct verify_header); |
| 188 | } |
| 189 | |
| 190 | /* |
| 191 | * Verify container, pass info to verify handlers and allow them to |
| 192 | * pass info back in case of error |
| 193 | */ |
| 194 | struct vcont { |
| 195 | /* |
| 196 | * Input |
| 197 | */ |
| 198 | struct io_u *io_u; |
| 199 | unsigned int hdr_num; |
| 200 | struct thread_data *td; |
| 201 | |
| 202 | /* |
| 203 | * Output, only valid in case of error |
| 204 | */ |
| 205 | const char *name; |
| 206 | void *good_crc; |
| 207 | void *bad_crc; |
| 208 | unsigned int crc_len; |
| 209 | }; |
| 210 | |
| 211 | static void dump_buf(char *buf, unsigned int len, unsigned long long offset, |
| 212 | const char *type, struct fio_file *f) |
| 213 | { |
| 214 | char *ptr, fname[256]; |
| 215 | int ret, fd; |
| 216 | |
| 217 | ptr = strdup(f->file_name); |
| 218 | strcpy(fname, basename(ptr)); |
| 219 | |
| 220 | sprintf(fname + strlen(fname), ".%llu.%s", offset, type); |
| 221 | |
| 222 | fd = open(fname, O_CREAT | O_TRUNC | O_WRONLY, 0644); |
| 223 | if (fd < 0) { |
| 224 | perror("open verify buf file"); |
| 225 | return; |
| 226 | } |
| 227 | |
| 228 | while (len) { |
| 229 | ret = write(fd, buf, len); |
| 230 | if (!ret) |
| 231 | break; |
| 232 | else if (ret < 0) { |
| 233 | perror("write verify buf file"); |
| 234 | break; |
| 235 | } |
| 236 | len -= ret; |
| 237 | buf += ret; |
| 238 | } |
| 239 | |
| 240 | close(fd); |
| 241 | log_err(" %s data dumped as %s\n", type, fname); |
| 242 | free(ptr); |
| 243 | } |
| 244 | |
| 245 | /* |
| 246 | * Dump the contents of the read block and re-generate the correct data |
| 247 | * and dump that too. |
| 248 | */ |
| 249 | static void dump_verify_buffers(struct verify_header *hdr, struct vcont *vc) |
| 250 | { |
| 251 | struct thread_data *td = vc->td; |
| 252 | struct io_u *io_u = vc->io_u; |
| 253 | unsigned long hdr_offset; |
| 254 | struct io_u dummy; |
| 255 | void *buf; |
| 256 | |
| 257 | if (!td->o.verify_dump) |
| 258 | return; |
| 259 | |
| 260 | /* |
| 261 | * Dump the contents we just read off disk |
| 262 | */ |
| 263 | hdr_offset = vc->hdr_num * hdr->len; |
| 264 | |
| 265 | dump_buf(io_u->buf + hdr_offset, hdr->len, io_u->offset + hdr_offset, |
| 266 | "received", vc->io_u->file); |
| 267 | |
| 268 | /* |
| 269 | * Allocate a new buf and re-generate the original data |
| 270 | */ |
| 271 | buf = malloc(io_u->buflen); |
| 272 | dummy = *io_u; |
| 273 | dummy.buf = buf; |
| 274 | dummy.rand_seed = hdr->rand_seed; |
| 275 | dummy.buf_filled_len = 0; |
| 276 | |
| 277 | fill_pattern_headers(td, &dummy, hdr->rand_seed, 1); |
| 278 | |
| 279 | dump_buf(buf + hdr_offset, hdr->len, io_u->offset + hdr_offset, |
| 280 | "expected", vc->io_u->file); |
| 281 | free(buf); |
| 282 | } |
| 283 | |
| 284 | static void log_verify_failure(struct verify_header *hdr, struct vcont *vc) |
| 285 | { |
| 286 | unsigned long long offset; |
| 287 | |
| 288 | offset = vc->io_u->offset; |
| 289 | offset += vc->hdr_num * hdr->len; |
| 290 | log_err("%.8s: verify failed at file %s offset %llu, length %u\n", |
| 291 | vc->name, vc->io_u->file->file_name, offset, hdr->len); |
| 292 | |
| 293 | if (vc->good_crc && vc->bad_crc) { |
| 294 | log_err(" Expected CRC: "); |
| 295 | hexdump(vc->good_crc, vc->crc_len); |
| 296 | log_err(" Received CRC: "); |
| 297 | hexdump(vc->bad_crc, vc->crc_len); |
| 298 | } |
| 299 | |
| 300 | dump_verify_buffers(hdr, vc); |
| 301 | } |
| 302 | |
| 303 | /* |
| 304 | * Return data area 'header_num' |
| 305 | */ |
| 306 | static inline void *io_u_verify_off(struct verify_header *hdr, struct vcont *vc) |
| 307 | { |
| 308 | return vc->io_u->buf + vc->hdr_num * hdr->len + hdr_size(hdr); |
| 309 | } |
| 310 | |
| 311 | static unsigned int hweight8(unsigned int w) |
| 312 | { |
| 313 | unsigned int res = w - ((w >> 1) & 0x55); |
| 314 | |
| 315 | res = (res & 0x33) + ((res >> 2) & 0x33); |
| 316 | return (res + (res >> 4)) & 0x0F; |
| 317 | } |
| 318 | |
| 319 | static int verify_io_u_pattern(struct verify_header *hdr, struct vcont *vc) |
| 320 | { |
| 321 | struct thread_data *td = vc->td; |
| 322 | struct io_u *io_u = vc->io_u; |
| 323 | char *buf, *pattern; |
| 324 | unsigned int header_size = __hdr_size(td->o.verify); |
| 325 | unsigned int len, mod, i, size, pattern_size; |
| 326 | |
| 327 | pattern = td->o.verify_pattern; |
| 328 | pattern_size = td->o.verify_pattern_bytes; |
| 329 | if (pattern_size <= 1) |
| 330 | pattern_size = MAX_PATTERN_SIZE; |
| 331 | buf = (void *) hdr + header_size; |
| 332 | len = get_hdr_inc(td, io_u) - header_size; |
| 333 | mod = header_size % pattern_size; |
| 334 | |
| 335 | for (i = 0; i < len; i += size) { |
| 336 | size = pattern_size - mod; |
| 337 | if (size > (len - i)) |
| 338 | size = len - i; |
| 339 | if (memcmp(buf + i, pattern + mod, size)) |
| 340 | /* Let the slow compare find the first mismatch byte. */ |
| 341 | break; |
| 342 | mod = 0; |
| 343 | } |
| 344 | |
| 345 | for (; i < len; i++) { |
| 346 | if (buf[i] != pattern[mod]) { |
| 347 | unsigned int bits; |
| 348 | |
| 349 | bits = hweight8(buf[i] ^ pattern[mod]); |
| 350 | log_err("fio: got pattern %x, wanted %x. Bad bits %d\n", |
| 351 | buf[i], pattern[mod], bits); |
| 352 | log_err("fio: bad pattern block offset %u\n", i); |
| 353 | dump_verify_buffers(hdr, vc); |
| 354 | return EILSEQ; |
| 355 | } |
| 356 | mod++; |
| 357 | if (mod == td->o.verify_pattern_bytes) |
| 358 | mod = 0; |
| 359 | } |
| 360 | |
| 361 | return 0; |
| 362 | } |
| 363 | |
| 364 | static int verify_io_u_meta(struct verify_header *hdr, struct vcont *vc) |
| 365 | { |
| 366 | struct thread_data *td = vc->td; |
| 367 | struct vhdr_meta *vh = hdr_priv(hdr); |
| 368 | struct io_u *io_u = vc->io_u; |
| 369 | int ret = EILSEQ; |
| 370 | |
| 371 | dprint(FD_VERIFY, "meta verify io_u %p, len %u\n", io_u, hdr->len); |
| 372 | |
| 373 | if (vh->offset == io_u->offset + vc->hdr_num * td->o.verify_interval) |
| 374 | ret = 0; |
| 375 | |
| 376 | if (td->o.verify_pattern_bytes) |
| 377 | ret |= verify_io_u_pattern(hdr, vc); |
| 378 | |
| 379 | if (!ret) |
| 380 | return 0; |
| 381 | |
| 382 | vc->name = "meta"; |
| 383 | log_verify_failure(hdr, vc); |
| 384 | return ret; |
| 385 | } |
| 386 | |
| 387 | static int verify_io_u_sha512(struct verify_header *hdr, struct vcont *vc) |
| 388 | { |
| 389 | void *p = io_u_verify_off(hdr, vc); |
| 390 | struct vhdr_sha512 *vh = hdr_priv(hdr); |
| 391 | uint8_t sha512[128]; |
| 392 | struct fio_sha512_ctx sha512_ctx = { |
| 393 | .buf = sha512, |
| 394 | }; |
| 395 | |
| 396 | dprint(FD_VERIFY, "sha512 verify io_u %p, len %u\n", vc->io_u, hdr->len); |
| 397 | |
| 398 | fio_sha512_init(&sha512_ctx); |
| 399 | fio_sha512_update(&sha512_ctx, p, hdr->len - hdr_size(hdr)); |
| 400 | |
| 401 | if (!memcmp(vh->sha512, sha512_ctx.buf, sizeof(sha512))) |
| 402 | return 0; |
| 403 | |
| 404 | vc->name = "sha512"; |
| 405 | vc->good_crc = vh->sha512; |
| 406 | vc->bad_crc = sha512_ctx.buf; |
| 407 | vc->crc_len = sizeof(vh->sha512); |
| 408 | log_verify_failure(hdr, vc); |
| 409 | return EILSEQ; |
| 410 | } |
| 411 | |
| 412 | static int verify_io_u_sha256(struct verify_header *hdr, struct vcont *vc) |
| 413 | { |
| 414 | void *p = io_u_verify_off(hdr, vc); |
| 415 | struct vhdr_sha256 *vh = hdr_priv(hdr); |
| 416 | uint8_t sha256[64]; |
| 417 | struct fio_sha256_ctx sha256_ctx = { |
| 418 | .buf = sha256, |
| 419 | }; |
| 420 | |
| 421 | dprint(FD_VERIFY, "sha256 verify io_u %p, len %u\n", vc->io_u, hdr->len); |
| 422 | |
| 423 | fio_sha256_init(&sha256_ctx); |
| 424 | fio_sha256_update(&sha256_ctx, p, hdr->len - hdr_size(hdr)); |
| 425 | |
| 426 | if (!memcmp(vh->sha256, sha256_ctx.buf, sizeof(sha256))) |
| 427 | return 0; |
| 428 | |
| 429 | vc->name = "sha256"; |
| 430 | vc->good_crc = vh->sha256; |
| 431 | vc->bad_crc = sha256_ctx.buf; |
| 432 | vc->crc_len = sizeof(vh->sha256); |
| 433 | log_verify_failure(hdr, vc); |
| 434 | return EILSEQ; |
| 435 | } |
| 436 | |
| 437 | static int verify_io_u_sha1(struct verify_header *hdr, struct vcont *vc) |
| 438 | { |
| 439 | void *p = io_u_verify_off(hdr, vc); |
| 440 | struct vhdr_sha1 *vh = hdr_priv(hdr); |
| 441 | uint32_t sha1[5]; |
| 442 | struct fio_sha1_ctx sha1_ctx = { |
| 443 | .H = sha1, |
| 444 | }; |
| 445 | |
| 446 | dprint(FD_VERIFY, "sha1 verify io_u %p, len %u\n", vc->io_u, hdr->len); |
| 447 | |
| 448 | fio_sha1_init(&sha1_ctx); |
| 449 | fio_sha1_update(&sha1_ctx, p, hdr->len - hdr_size(hdr)); |
| 450 | |
| 451 | if (!memcmp(vh->sha1, sha1_ctx.H, sizeof(sha1))) |
| 452 | return 0; |
| 453 | |
| 454 | vc->name = "sha1"; |
| 455 | vc->good_crc = vh->sha1; |
| 456 | vc->bad_crc = sha1_ctx.H; |
| 457 | vc->crc_len = sizeof(vh->sha1); |
| 458 | log_verify_failure(hdr, vc); |
| 459 | return EILSEQ; |
| 460 | } |
| 461 | |
| 462 | static int verify_io_u_crc7(struct verify_header *hdr, struct vcont *vc) |
| 463 | { |
| 464 | void *p = io_u_verify_off(hdr, vc); |
| 465 | struct vhdr_crc7 *vh = hdr_priv(hdr); |
| 466 | unsigned char c; |
| 467 | |
| 468 | dprint(FD_VERIFY, "crc7 verify io_u %p, len %u\n", vc->io_u, hdr->len); |
| 469 | |
| 470 | c = fio_crc7(p, hdr->len - hdr_size(hdr)); |
| 471 | |
| 472 | if (c == vh->crc7) |
| 473 | return 0; |
| 474 | |
| 475 | vc->name = "crc7"; |
| 476 | vc->good_crc = &vh->crc7; |
| 477 | vc->bad_crc = &c; |
| 478 | vc->crc_len = 1; |
| 479 | log_verify_failure(hdr, vc); |
| 480 | return EILSEQ; |
| 481 | } |
| 482 | |
| 483 | static int verify_io_u_crc16(struct verify_header *hdr, struct vcont *vc) |
| 484 | { |
| 485 | void *p = io_u_verify_off(hdr, vc); |
| 486 | struct vhdr_crc16 *vh = hdr_priv(hdr); |
| 487 | unsigned short c; |
| 488 | |
| 489 | dprint(FD_VERIFY, "crc16 verify io_u %p, len %u\n", vc->io_u, hdr->len); |
| 490 | |
| 491 | c = fio_crc16(p, hdr->len - hdr_size(hdr)); |
| 492 | |
| 493 | if (c == vh->crc16) |
| 494 | return 0; |
| 495 | |
| 496 | vc->name = "crc16"; |
| 497 | vc->good_crc = &vh->crc16; |
| 498 | vc->bad_crc = &c; |
| 499 | vc->crc_len = 2; |
| 500 | log_verify_failure(hdr, vc); |
| 501 | return EILSEQ; |
| 502 | } |
| 503 | |
| 504 | static int verify_io_u_crc64(struct verify_header *hdr, struct vcont *vc) |
| 505 | { |
| 506 | void *p = io_u_verify_off(hdr, vc); |
| 507 | struct vhdr_crc64 *vh = hdr_priv(hdr); |
| 508 | unsigned long long c; |
| 509 | |
| 510 | dprint(FD_VERIFY, "crc64 verify io_u %p, len %u\n", vc->io_u, hdr->len); |
| 511 | |
| 512 | c = fio_crc64(p, hdr->len - hdr_size(hdr)); |
| 513 | |
| 514 | if (c == vh->crc64) |
| 515 | return 0; |
| 516 | |
| 517 | vc->name = "crc64"; |
| 518 | vc->good_crc = &vh->crc64; |
| 519 | vc->bad_crc = &c; |
| 520 | vc->crc_len = 8; |
| 521 | log_verify_failure(hdr, vc); |
| 522 | return EILSEQ; |
| 523 | } |
| 524 | |
| 525 | static int verify_io_u_crc32(struct verify_header *hdr, struct vcont *vc) |
| 526 | { |
| 527 | void *p = io_u_verify_off(hdr, vc); |
| 528 | struct vhdr_crc32 *vh = hdr_priv(hdr); |
| 529 | uint32_t c; |
| 530 | |
| 531 | dprint(FD_VERIFY, "crc32 verify io_u %p, len %u\n", vc->io_u, hdr->len); |
| 532 | |
| 533 | c = fio_crc32(p, hdr->len - hdr_size(hdr)); |
| 534 | |
| 535 | if (c == vh->crc32) |
| 536 | return 0; |
| 537 | |
| 538 | vc->name = "crc32"; |
| 539 | vc->good_crc = &vh->crc32; |
| 540 | vc->bad_crc = &c; |
| 541 | vc->crc_len = 4; |
| 542 | log_verify_failure(hdr, vc); |
| 543 | return EILSEQ; |
| 544 | } |
| 545 | |
| 546 | static int verify_io_u_crc32c(struct verify_header *hdr, struct vcont *vc) |
| 547 | { |
| 548 | void *p = io_u_verify_off(hdr, vc); |
| 549 | struct vhdr_crc32 *vh = hdr_priv(hdr); |
| 550 | uint32_t c; |
| 551 | |
| 552 | dprint(FD_VERIFY, "crc32c verify io_u %p, len %u\n", vc->io_u, hdr->len); |
| 553 | |
| 554 | c = fio_crc32c(p, hdr->len - hdr_size(hdr)); |
| 555 | |
| 556 | if (c == vh->crc32) |
| 557 | return 0; |
| 558 | |
| 559 | vc->name = "crc32c"; |
| 560 | vc->good_crc = &vh->crc32; |
| 561 | vc->bad_crc = &c; |
| 562 | vc->crc_len = 4; |
| 563 | log_verify_failure(hdr, vc); |
| 564 | return EILSEQ; |
| 565 | } |
| 566 | |
| 567 | static int verify_io_u_md5(struct verify_header *hdr, struct vcont *vc) |
| 568 | { |
| 569 | void *p = io_u_verify_off(hdr, vc); |
| 570 | struct vhdr_md5 *vh = hdr_priv(hdr); |
| 571 | uint32_t hash[MD5_HASH_WORDS]; |
| 572 | struct fio_md5_ctx md5_ctx = { |
| 573 | .hash = hash, |
| 574 | }; |
| 575 | |
| 576 | dprint(FD_VERIFY, "md5 verify io_u %p, len %u\n", vc->io_u, hdr->len); |
| 577 | |
| 578 | fio_md5_init(&md5_ctx); |
| 579 | fio_md5_update(&md5_ctx, p, hdr->len - hdr_size(hdr)); |
| 580 | |
| 581 | if (!memcmp(vh->md5_digest, md5_ctx.hash, sizeof(hash))) |
| 582 | return 0; |
| 583 | |
| 584 | vc->name = "md5"; |
| 585 | vc->good_crc = vh->md5_digest; |
| 586 | vc->bad_crc = md5_ctx.hash; |
| 587 | vc->crc_len = sizeof(hash); |
| 588 | log_verify_failure(hdr, vc); |
| 589 | return EILSEQ; |
| 590 | } |
| 591 | |
| 592 | /* |
| 593 | * Push IO verification to a separate thread |
| 594 | */ |
| 595 | int verify_io_u_async(struct thread_data *td, struct io_u *io_u) |
| 596 | { |
| 597 | if (io_u->file) |
| 598 | put_file_log(td, io_u->file); |
| 599 | |
| 600 | pthread_mutex_lock(&td->io_u_lock); |
| 601 | |
| 602 | if (io_u->flags & IO_U_F_IN_CUR_DEPTH) { |
| 603 | td->cur_depth--; |
| 604 | io_u->flags &= ~IO_U_F_IN_CUR_DEPTH; |
| 605 | } |
| 606 | flist_del(&io_u->list); |
| 607 | flist_add_tail(&io_u->list, &td->verify_list); |
| 608 | io_u->flags |= IO_U_F_FREE_DEF; |
| 609 | pthread_mutex_unlock(&td->io_u_lock); |
| 610 | |
| 611 | pthread_cond_signal(&td->verify_cond); |
| 612 | return 0; |
| 613 | } |
| 614 | |
| 615 | static int verify_trimmed_io_u(struct thread_data *td, struct io_u *io_u) |
| 616 | { |
| 617 | static char zero_buf[1024]; |
| 618 | unsigned int this_len, len; |
| 619 | int ret = 0; |
| 620 | void *p; |
| 621 | |
| 622 | if (!td->o.trim_zero) |
| 623 | return 0; |
| 624 | |
| 625 | len = io_u->buflen; |
| 626 | p = io_u->buf; |
| 627 | do { |
| 628 | this_len = sizeof(zero_buf); |
| 629 | if (this_len > len) |
| 630 | this_len = len; |
| 631 | if (memcmp(p, zero_buf, this_len)) { |
| 632 | ret = EILSEQ; |
| 633 | break; |
| 634 | } |
| 635 | len -= this_len; |
| 636 | p += this_len; |
| 637 | } while (len); |
| 638 | |
| 639 | if (!ret) |
| 640 | return 0; |
| 641 | |
| 642 | log_err("trim: verify failed at file %s offset %llu, length %lu" |
| 643 | ", block offset %lu\n", |
| 644 | io_u->file->file_name, io_u->offset, io_u->buflen, |
| 645 | (unsigned long) (p - io_u->buf)); |
| 646 | return ret; |
| 647 | } |
| 648 | |
| 649 | static int verify_header(struct io_u *io_u, struct verify_header *hdr) |
| 650 | { |
| 651 | void *p = hdr; |
| 652 | uint32_t crc; |
| 653 | |
| 654 | if (hdr->magic != FIO_HDR_MAGIC) |
| 655 | return 0; |
| 656 | if (hdr->len > io_u->buflen) { |
| 657 | log_err("fio: verify header exceeds buffer length (%u > %lu)\n", hdr->len, io_u->buflen); |
| 658 | return 0; |
| 659 | } |
| 660 | |
| 661 | crc = fio_crc32c(p, offsetof(struct verify_header, crc32)); |
| 662 | if (crc == hdr->crc32) |
| 663 | return 1; |
| 664 | |
| 665 | log_err("fio: verify header crc %x, calculated %x\n", hdr->crc32, crc); |
| 666 | return 0; |
| 667 | } |
| 668 | |
| 669 | int verify_io_u(struct thread_data *td, struct io_u *io_u) |
| 670 | { |
| 671 | struct verify_header *hdr; |
| 672 | unsigned int header_size, hdr_inc, hdr_num = 0; |
| 673 | void *p; |
| 674 | int ret; |
| 675 | |
| 676 | if (td->o.verify == VERIFY_NULL || io_u->ddir != DDIR_READ) |
| 677 | return 0; |
| 678 | if (io_u->flags & IO_U_F_TRIMMED) { |
| 679 | ret = verify_trimmed_io_u(td, io_u); |
| 680 | goto done; |
| 681 | } |
| 682 | |
| 683 | hdr_inc = get_hdr_inc(td, io_u); |
| 684 | |
| 685 | ret = 0; |
| 686 | for (p = io_u->buf; p < io_u->buf + io_u->buflen; |
| 687 | p += hdr_inc, hdr_num++) { |
| 688 | struct vcont vc = { |
| 689 | .io_u = io_u, |
| 690 | .hdr_num = hdr_num, |
| 691 | .td = td, |
| 692 | }; |
| 693 | |
| 694 | if (ret && td->o.verify_fatal) |
| 695 | break; |
| 696 | |
| 697 | header_size = __hdr_size(td->o.verify); |
| 698 | if (td->o.verify_offset) |
| 699 | memswp(p, p + td->o.verify_offset, header_size); |
| 700 | hdr = p; |
| 701 | |
| 702 | if (!verify_header(io_u, hdr)) { |
| 703 | log_err("verify: bad magic header %x, wanted %x at " |
| 704 | "file %s offset %llu, length %u\n", |
| 705 | hdr->magic, FIO_HDR_MAGIC, |
| 706 | io_u->file->file_name, |
| 707 | io_u->offset + hdr_num * hdr->len, hdr->len); |
| 708 | return EILSEQ; |
| 709 | } |
| 710 | |
| 711 | switch (hdr->verify_type) { |
| 712 | case VERIFY_MD5: |
| 713 | ret = verify_io_u_md5(hdr, &vc); |
| 714 | break; |
| 715 | case VERIFY_CRC64: |
| 716 | ret = verify_io_u_crc64(hdr, &vc); |
| 717 | break; |
| 718 | case VERIFY_CRC32C: |
| 719 | case VERIFY_CRC32C_INTEL: |
| 720 | ret = verify_io_u_crc32c(hdr, &vc); |
| 721 | break; |
| 722 | case VERIFY_CRC32: |
| 723 | ret = verify_io_u_crc32(hdr, &vc); |
| 724 | break; |
| 725 | case VERIFY_CRC16: |
| 726 | ret = verify_io_u_crc16(hdr, &vc); |
| 727 | break; |
| 728 | case VERIFY_CRC7: |
| 729 | ret = verify_io_u_crc7(hdr, &vc); |
| 730 | break; |
| 731 | case VERIFY_SHA256: |
| 732 | ret = verify_io_u_sha256(hdr, &vc); |
| 733 | break; |
| 734 | case VERIFY_SHA512: |
| 735 | ret = verify_io_u_sha512(hdr, &vc); |
| 736 | break; |
| 737 | case VERIFY_META: |
| 738 | ret = verify_io_u_meta(hdr, &vc); |
| 739 | break; |
| 740 | case VERIFY_SHA1: |
| 741 | ret = verify_io_u_sha1(hdr, &vc); |
| 742 | break; |
| 743 | case VERIFY_PATTERN: |
| 744 | ret = verify_io_u_pattern(hdr, &vc); |
| 745 | break; |
| 746 | default: |
| 747 | log_err("Bad verify type %u\n", hdr->verify_type); |
| 748 | ret = EINVAL; |
| 749 | } |
| 750 | } |
| 751 | |
| 752 | done: |
| 753 | if (ret && td->o.verify_fatal) |
| 754 | td->terminate = 1; |
| 755 | |
| 756 | return ret; |
| 757 | } |
| 758 | |
| 759 | static void fill_meta(struct verify_header *hdr, struct thread_data *td, |
| 760 | struct io_u *io_u, unsigned int header_num) |
| 761 | { |
| 762 | struct vhdr_meta *vh = hdr_priv(hdr); |
| 763 | |
| 764 | vh->thread = td->thread_number; |
| 765 | |
| 766 | vh->time_sec = io_u->start_time.tv_sec; |
| 767 | vh->time_usec = io_u->start_time.tv_usec; |
| 768 | |
| 769 | vh->numberio = td->io_issues[DDIR_WRITE]; |
| 770 | |
| 771 | vh->offset = io_u->offset + header_num * td->o.verify_interval; |
| 772 | } |
| 773 | |
| 774 | static void fill_sha512(struct verify_header *hdr, void *p, unsigned int len) |
| 775 | { |
| 776 | struct vhdr_sha512 *vh = hdr_priv(hdr); |
| 777 | struct fio_sha512_ctx sha512_ctx = { |
| 778 | .buf = vh->sha512, |
| 779 | }; |
| 780 | |
| 781 | fio_sha512_init(&sha512_ctx); |
| 782 | fio_sha512_update(&sha512_ctx, p, len); |
| 783 | } |
| 784 | |
| 785 | static void fill_sha256(struct verify_header *hdr, void *p, unsigned int len) |
| 786 | { |
| 787 | struct vhdr_sha256 *vh = hdr_priv(hdr); |
| 788 | struct fio_sha256_ctx sha256_ctx = { |
| 789 | .buf = vh->sha256, |
| 790 | }; |
| 791 | |
| 792 | fio_sha256_init(&sha256_ctx); |
| 793 | fio_sha256_update(&sha256_ctx, p, len); |
| 794 | } |
| 795 | |
| 796 | static void fill_sha1(struct verify_header *hdr, void *p, unsigned int len) |
| 797 | { |
| 798 | struct vhdr_sha1 *vh = hdr_priv(hdr); |
| 799 | struct fio_sha1_ctx sha1_ctx = { |
| 800 | .H = vh->sha1, |
| 801 | }; |
| 802 | |
| 803 | fio_sha1_init(&sha1_ctx); |
| 804 | fio_sha1_update(&sha1_ctx, p, len); |
| 805 | } |
| 806 | |
| 807 | static void fill_crc7(struct verify_header *hdr, void *p, unsigned int len) |
| 808 | { |
| 809 | struct vhdr_crc7 *vh = hdr_priv(hdr); |
| 810 | |
| 811 | vh->crc7 = fio_crc7(p, len); |
| 812 | } |
| 813 | |
| 814 | static void fill_crc16(struct verify_header *hdr, void *p, unsigned int len) |
| 815 | { |
| 816 | struct vhdr_crc16 *vh = hdr_priv(hdr); |
| 817 | |
| 818 | vh->crc16 = fio_crc16(p, len); |
| 819 | } |
| 820 | |
| 821 | static void fill_crc32(struct verify_header *hdr, void *p, unsigned int len) |
| 822 | { |
| 823 | struct vhdr_crc32 *vh = hdr_priv(hdr); |
| 824 | |
| 825 | vh->crc32 = fio_crc32(p, len); |
| 826 | } |
| 827 | |
| 828 | static void fill_crc32c(struct verify_header *hdr, void *p, unsigned int len) |
| 829 | { |
| 830 | struct vhdr_crc32 *vh = hdr_priv(hdr); |
| 831 | |
| 832 | vh->crc32 = fio_crc32c(p, len); |
| 833 | } |
| 834 | |
| 835 | static void fill_crc64(struct verify_header *hdr, void *p, unsigned int len) |
| 836 | { |
| 837 | struct vhdr_crc64 *vh = hdr_priv(hdr); |
| 838 | |
| 839 | vh->crc64 = fio_crc64(p, len); |
| 840 | } |
| 841 | |
| 842 | static void fill_md5(struct verify_header *hdr, void *p, unsigned int len) |
| 843 | { |
| 844 | struct vhdr_md5 *vh = hdr_priv(hdr); |
| 845 | struct fio_md5_ctx md5_ctx = { |
| 846 | .hash = (uint32_t *) vh->md5_digest, |
| 847 | }; |
| 848 | |
| 849 | fio_md5_init(&md5_ctx); |
| 850 | fio_md5_update(&md5_ctx, p, len); |
| 851 | } |
| 852 | |
| 853 | static void populate_hdr(struct thread_data *td, struct io_u *io_u, |
| 854 | struct verify_header *hdr, unsigned int header_num, |
| 855 | unsigned int header_len) |
| 856 | { |
| 857 | unsigned int data_len; |
| 858 | void *data, *p; |
| 859 | |
| 860 | p = (void *) hdr; |
| 861 | |
| 862 | hdr->magic = FIO_HDR_MAGIC; |
| 863 | hdr->verify_type = td->o.verify; |
| 864 | hdr->len = header_len; |
| 865 | hdr->rand_seed = io_u->rand_seed; |
| 866 | hdr->crc32 = fio_crc32c(p, offsetof(struct verify_header, crc32)); |
| 867 | |
| 868 | data_len = header_len - hdr_size(hdr); |
| 869 | |
| 870 | data = p + hdr_size(hdr); |
| 871 | switch (td->o.verify) { |
| 872 | case VERIFY_MD5: |
| 873 | dprint(FD_VERIFY, "fill md5 io_u %p, len %u\n", |
| 874 | io_u, hdr->len); |
| 875 | fill_md5(hdr, data, data_len); |
| 876 | break; |
| 877 | case VERIFY_CRC64: |
| 878 | dprint(FD_VERIFY, "fill crc64 io_u %p, len %u\n", |
| 879 | io_u, hdr->len); |
| 880 | fill_crc64(hdr, data, data_len); |
| 881 | break; |
| 882 | case VERIFY_CRC32C: |
| 883 | case VERIFY_CRC32C_INTEL: |
| 884 | dprint(FD_VERIFY, "fill crc32c io_u %p, len %u\n", |
| 885 | io_u, hdr->len); |
| 886 | fill_crc32c(hdr, data, data_len); |
| 887 | break; |
| 888 | case VERIFY_CRC32: |
| 889 | dprint(FD_VERIFY, "fill crc32 io_u %p, len %u\n", |
| 890 | io_u, hdr->len); |
| 891 | fill_crc32(hdr, data, data_len); |
| 892 | break; |
| 893 | case VERIFY_CRC16: |
| 894 | dprint(FD_VERIFY, "fill crc16 io_u %p, len %u\n", |
| 895 | io_u, hdr->len); |
| 896 | fill_crc16(hdr, data, data_len); |
| 897 | break; |
| 898 | case VERIFY_CRC7: |
| 899 | dprint(FD_VERIFY, "fill crc7 io_u %p, len %u\n", |
| 900 | io_u, hdr->len); |
| 901 | fill_crc7(hdr, data, data_len); |
| 902 | break; |
| 903 | case VERIFY_SHA256: |
| 904 | dprint(FD_VERIFY, "fill sha256 io_u %p, len %u\n", |
| 905 | io_u, hdr->len); |
| 906 | fill_sha256(hdr, data, data_len); |
| 907 | break; |
| 908 | case VERIFY_SHA512: |
| 909 | dprint(FD_VERIFY, "fill sha512 io_u %p, len %u\n", |
| 910 | io_u, hdr->len); |
| 911 | fill_sha512(hdr, data, data_len); |
| 912 | break; |
| 913 | case VERIFY_META: |
| 914 | dprint(FD_VERIFY, "fill meta io_u %p, len %u\n", |
| 915 | io_u, hdr->len); |
| 916 | fill_meta(hdr, td, io_u, header_num); |
| 917 | break; |
| 918 | case VERIFY_SHA1: |
| 919 | dprint(FD_VERIFY, "fill sha1 io_u %p, len %u\n", |
| 920 | io_u, hdr->len); |
| 921 | fill_sha1(hdr, data, data_len); |
| 922 | break; |
| 923 | case VERIFY_PATTERN: |
| 924 | /* nothing to do here */ |
| 925 | break; |
| 926 | default: |
| 927 | log_err("fio: bad verify type: %d\n", td->o.verify); |
| 928 | assert(0); |
| 929 | } |
| 930 | if (td->o.verify_offset) |
| 931 | memswp(p, p + td->o.verify_offset, hdr_size(hdr)); |
| 932 | } |
| 933 | |
| 934 | /* |
| 935 | * fill body of io_u->buf with random data and add a header with the |
| 936 | * checksum of choice |
| 937 | */ |
| 938 | void populate_verify_io_u(struct thread_data *td, struct io_u *io_u) |
| 939 | { |
| 940 | if (td->o.verify == VERIFY_NULL) |
| 941 | return; |
| 942 | |
| 943 | fill_pattern_headers(td, io_u, 0, 0); |
| 944 | } |
| 945 | |
| 946 | int get_next_verify(struct thread_data *td, struct io_u *io_u) |
| 947 | { |
| 948 | struct io_piece *ipo = NULL; |
| 949 | |
| 950 | /* |
| 951 | * this io_u is from a requeue, we already filled the offsets |
| 952 | */ |
| 953 | if (io_u->file) |
| 954 | return 0; |
| 955 | |
| 956 | if (!RB_EMPTY_ROOT(&td->io_hist_tree)) { |
| 957 | struct rb_node *n = rb_first(&td->io_hist_tree); |
| 958 | |
| 959 | ipo = rb_entry(n, struct io_piece, rb_node); |
| 960 | rb_erase(n, &td->io_hist_tree); |
| 961 | assert(ipo->flags & IP_F_ONRB); |
| 962 | ipo->flags &= ~IP_F_ONRB; |
| 963 | } else if (!flist_empty(&td->io_hist_list)) { |
| 964 | ipo = flist_entry(td->io_hist_list.next, struct io_piece, list); |
| 965 | flist_del(&ipo->list); |
| 966 | assert(ipo->flags & IP_F_ONLIST); |
| 967 | ipo->flags &= ~IP_F_ONLIST; |
| 968 | } |
| 969 | |
| 970 | if (ipo) { |
| 971 | td->io_hist_len--; |
| 972 | |
| 973 | io_u->offset = ipo->offset; |
| 974 | io_u->buflen = ipo->len; |
| 975 | io_u->file = ipo->file; |
| 976 | io_u->flags |= IO_U_F_VER_LIST; |
| 977 | |
| 978 | if (ipo->flags & IP_F_TRIMMED) |
| 979 | io_u->flags |= IO_U_F_TRIMMED; |
| 980 | |
| 981 | if (!fio_file_open(io_u->file)) { |
| 982 | int r = td_io_open_file(td, io_u->file); |
| 983 | |
| 984 | if (r) { |
| 985 | dprint(FD_VERIFY, "failed file %s open\n", |
| 986 | io_u->file->file_name); |
| 987 | return 1; |
| 988 | } |
| 989 | } |
| 990 | |
| 991 | get_file(ipo->file); |
| 992 | assert(fio_file_open(io_u->file)); |
| 993 | io_u->ddir = DDIR_READ; |
| 994 | io_u->xfer_buf = io_u->buf; |
| 995 | io_u->xfer_buflen = io_u->buflen; |
| 996 | |
| 997 | remove_trim_entry(td, ipo); |
| 998 | free(ipo); |
| 999 | dprint(FD_VERIFY, "get_next_verify: ret io_u %p\n", io_u); |
| 1000 | return 0; |
| 1001 | } |
| 1002 | |
| 1003 | dprint(FD_VERIFY, "get_next_verify: empty\n"); |
| 1004 | return 1; |
| 1005 | } |
| 1006 | |
| 1007 | void fio_verify_init(struct thread_data *td) |
| 1008 | { |
| 1009 | if (td->o.verify == VERIFY_CRC32C_INTEL || |
| 1010 | td->o.verify == VERIFY_CRC32C) { |
| 1011 | crc32c_intel_probe(); |
| 1012 | } |
| 1013 | } |
| 1014 | |
| 1015 | static void *verify_async_thread(void *data) |
| 1016 | { |
| 1017 | struct thread_data *td = data; |
| 1018 | struct io_u *io_u; |
| 1019 | int ret = 0; |
| 1020 | |
| 1021 | if (td->o.verify_cpumask_set && |
| 1022 | fio_setaffinity(td->pid, td->o.verify_cpumask)) { |
| 1023 | log_err("fio: failed setting verify thread affinity\n"); |
| 1024 | goto done; |
| 1025 | } |
| 1026 | |
| 1027 | do { |
| 1028 | FLIST_HEAD(list); |
| 1029 | |
| 1030 | read_barrier(); |
| 1031 | if (td->verify_thread_exit) |
| 1032 | break; |
| 1033 | |
| 1034 | pthread_mutex_lock(&td->io_u_lock); |
| 1035 | |
| 1036 | while (flist_empty(&td->verify_list) && |
| 1037 | !td->verify_thread_exit) { |
| 1038 | ret = pthread_cond_wait(&td->verify_cond, |
| 1039 | &td->io_u_lock); |
| 1040 | if (ret) { |
| 1041 | pthread_mutex_unlock(&td->io_u_lock); |
| 1042 | break; |
| 1043 | } |
| 1044 | } |
| 1045 | |
| 1046 | flist_splice_init(&td->verify_list, &list); |
| 1047 | pthread_mutex_unlock(&td->io_u_lock); |
| 1048 | |
| 1049 | if (flist_empty(&list)) |
| 1050 | continue; |
| 1051 | |
| 1052 | while (!flist_empty(&list)) { |
| 1053 | io_u = flist_entry(list.next, struct io_u, list); |
| 1054 | flist_del_init(&io_u->list); |
| 1055 | |
| 1056 | ret = verify_io_u(td, io_u); |
| 1057 | put_io_u(td, io_u); |
| 1058 | if (!ret) |
| 1059 | continue; |
| 1060 | if (td->o.continue_on_error & ERROR_TYPE_VERIFY && |
| 1061 | td_non_fatal_error(ret)) { |
| 1062 | update_error_count(td, ret); |
| 1063 | td_clear_error(td); |
| 1064 | ret = 0; |
| 1065 | } |
| 1066 | } |
| 1067 | } while (!ret); |
| 1068 | |
| 1069 | if (ret) { |
| 1070 | td_verror(td, ret, "async_verify"); |
| 1071 | if (td->o.verify_fatal) |
| 1072 | td->terminate = 1; |
| 1073 | } |
| 1074 | |
| 1075 | done: |
| 1076 | pthread_mutex_lock(&td->io_u_lock); |
| 1077 | td->nr_verify_threads--; |
| 1078 | pthread_mutex_unlock(&td->io_u_lock); |
| 1079 | |
| 1080 | pthread_cond_signal(&td->free_cond); |
| 1081 | return NULL; |
| 1082 | } |
| 1083 | |
| 1084 | int verify_async_init(struct thread_data *td) |
| 1085 | { |
| 1086 | int i, ret; |
| 1087 | pthread_attr_t attr; |
| 1088 | |
| 1089 | pthread_attr_init(&attr); |
| 1090 | pthread_attr_setstacksize(&attr, PTHREAD_STACK_MIN); |
| 1091 | |
| 1092 | td->verify_thread_exit = 0; |
| 1093 | |
| 1094 | td->verify_threads = malloc(sizeof(pthread_t) * td->o.verify_async); |
| 1095 | for (i = 0; i < td->o.verify_async; i++) { |
| 1096 | ret = pthread_create(&td->verify_threads[i], &attr, |
| 1097 | verify_async_thread, td); |
| 1098 | if (ret) { |
| 1099 | log_err("fio: async verify creation failed: %s\n", |
| 1100 | strerror(ret)); |
| 1101 | break; |
| 1102 | } |
| 1103 | ret = pthread_detach(td->verify_threads[i]); |
| 1104 | if (ret) { |
| 1105 | log_err("fio: async verify thread detach failed: %s\n", |
| 1106 | strerror(ret)); |
| 1107 | break; |
| 1108 | } |
| 1109 | td->nr_verify_threads++; |
| 1110 | } |
| 1111 | |
| 1112 | pthread_attr_destroy(&attr); |
| 1113 | |
| 1114 | if (i != td->o.verify_async) { |
| 1115 | log_err("fio: only %d verify threads started, exiting\n", i); |
| 1116 | td->verify_thread_exit = 1; |
| 1117 | write_barrier(); |
| 1118 | pthread_cond_broadcast(&td->verify_cond); |
| 1119 | return 1; |
| 1120 | } |
| 1121 | |
| 1122 | return 0; |
| 1123 | } |
| 1124 | |
| 1125 | void verify_async_exit(struct thread_data *td) |
| 1126 | { |
| 1127 | td->verify_thread_exit = 1; |
| 1128 | write_barrier(); |
| 1129 | pthread_cond_broadcast(&td->verify_cond); |
| 1130 | |
| 1131 | pthread_mutex_lock(&td->io_u_lock); |
| 1132 | |
| 1133 | while (td->nr_verify_threads) |
| 1134 | pthread_cond_wait(&td->free_cond, &td->io_u_lock); |
| 1135 | |
| 1136 | pthread_mutex_unlock(&td->io_u_lock); |
| 1137 | free(td->verify_threads); |
| 1138 | td->verify_threads = NULL; |
| 1139 | } |