2 * IO verification helpers
15 #include "lib/hweight.h"
16 #include "lib/pattern.h"
19 #include "crc/crc64.h"
20 #include "crc/crc32.h"
21 #include "crc/crc32c.h"
22 #include "crc/crc16.h"
24 #include "crc/sha256.h"
25 #include "crc/sha512.h"
27 #include "crc/xxhash.h"
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);
37 void fill_buffer_pattern(struct thread_data *td, void *p, unsigned int len)
39 (void)cpy_pattern(td->o.buffer_pattern, td->o.buffer_pattern_bytes, p, len);
42 static void __fill_buffer(struct thread_options *o, unsigned long seed, void *p,
45 __fill_random_buf_percentage(seed, p, o->compress_percentage, len, len, o->buffer_pattern, o->buffer_pattern_bytes);
48 static unsigned long fill_buffer(struct thread_data *td, void *p,
51 struct frand_state *fs = &td->verify_state;
52 struct thread_options *o = &td->o;
54 return fill_random_buf_percentage(fs, p, o->compress_percentage, len, len, o->buffer_pattern, o->buffer_pattern_bytes);
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)
60 struct thread_options *o = &td->o;
62 if (!o->verify_pattern_bytes) {
63 dprint(FD_VERIFY, "fill random bytes len=%u\n", len);
66 __fill_buffer(o, seed, p, len);
68 io_u->rand_seed = fill_buffer(td, p, len);
72 /* Skip if we were here and we do not need to patch pattern
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);
80 (void)paste_format(td->o.verify_pattern, td->o.verify_pattern_bytes,
81 td->o.verify_fmt, td->o.verify_fmt_sz,
83 io_u->buf_filled_len = len;
86 static unsigned int get_hdr_inc(struct thread_data *td, struct io_u *io_u)
91 * If we use bs_unaligned, buflen can be larger than the verify
92 * interval (which just defaults to the smallest blocksize possible).
94 hdr_inc = io_u->buflen;
95 if (td->o.verify_interval && td->o.verify_interval <= io_u->buflen &&
97 hdr_inc = td->o.verify_interval;
102 static void fill_pattern_headers(struct thread_data *td, struct io_u *io_u,
103 unsigned long seed, int use_seed)
105 unsigned int hdr_inc, header_num;
106 struct verify_header *hdr;
109 fill_verify_pattern(td, p, io_u->buflen, io_u, seed, use_seed);
111 hdr_inc = get_hdr_inc(td, io_u);
113 for (; p < io_u->buf + io_u->buflen; p += hdr_inc) {
115 populate_hdr(td, io_u, hdr, header_num, hdr_inc);
120 static void memswp(void *buf1, void *buf2, unsigned int len)
124 assert(len <= sizeof(swap));
126 memcpy(&swap, buf1, len);
127 memcpy(buf1, buf2, len);
128 memcpy(buf2, &swap, len);
131 static void hexdump(void *buffer, int len)
133 unsigned char *p = buffer;
136 for (i = 0; i < len; i++)
137 log_err("%02x", p[i]);
142 * Prepare for separation of verify_header and checksum header
144 static inline unsigned int __hdr_size(int verify_type)
146 unsigned int len = 0;
148 switch (verify_type) {
150 case VERIFY_HDR_ONLY:
156 len = sizeof(struct vhdr_md5);
159 len = sizeof(struct vhdr_crc64);
163 case VERIFY_CRC32C_INTEL:
164 len = sizeof(struct vhdr_crc32);
167 len = sizeof(struct vhdr_crc16);
170 len = sizeof(struct vhdr_crc7);
173 len = sizeof(struct vhdr_sha256);
176 len = sizeof(struct vhdr_sha512);
178 case VERIFY_SHA3_224:
179 len = sizeof(struct vhdr_sha3_224);
181 case VERIFY_SHA3_256:
182 len = sizeof(struct vhdr_sha3_256);
184 case VERIFY_SHA3_384:
185 len = sizeof(struct vhdr_sha3_384);
187 case VERIFY_SHA3_512:
188 len = sizeof(struct vhdr_sha3_512);
191 len = sizeof(struct vhdr_xxhash);
194 len = sizeof(struct vhdr_sha1);
196 case VERIFY_PATTERN_NO_HDR:
199 log_err("fio: unknown verify header!\n");
203 return len + sizeof(struct verify_header);
206 static inline unsigned int hdr_size(struct thread_data *td,
207 struct verify_header *hdr)
209 if (td->o.verify == VERIFY_PATTERN_NO_HDR)
212 return __hdr_size(hdr->verify_type);
215 static void *hdr_priv(struct verify_header *hdr)
219 return priv + sizeof(struct verify_header);
223 * Verify container, pass info to verify handlers and allow them to
224 * pass info back in case of error
231 unsigned int hdr_num;
232 struct thread_data *td;
235 * Output, only valid in case of error
240 unsigned int crc_len;
243 #define DUMP_BUF_SZ 255
244 static int dump_buf_warned;
246 static void dump_buf(char *buf, unsigned int len, unsigned long long offset,
247 const char *type, struct fio_file *f)
249 char *ptr, fname[DUMP_BUF_SZ];
250 size_t buf_left = DUMP_BUF_SZ;
253 ptr = strdup(f->file_name);
255 memset(fname, 0, sizeof(fname));
257 sprintf(fname, "%s%c", aux_path, FIO_OS_PATH_SEPARATOR);
259 strncpy(fname + strlen(fname), basename(ptr), buf_left - 1);
261 buf_left -= strlen(fname);
263 if (!dump_buf_warned) {
264 log_err("fio: verify failure dump buffer too small\n");
271 snprintf(fname + strlen(fname), buf_left, ".%llu.%s", offset, type);
273 fd = open(fname, O_CREAT | O_TRUNC | O_WRONLY, 0644);
275 perror("open verify buf file");
281 ret = write(fd, buf, len);
285 perror("write verify buf file");
293 log_err(" %s data dumped as %s\n", type, fname);
298 * Dump the contents of the read block and re-generate the correct data
301 static void __dump_verify_buffers(struct verify_header *hdr, struct vcont *vc)
303 struct thread_data *td = vc->td;
304 struct io_u *io_u = vc->io_u;
305 unsigned long hdr_offset;
309 if (!td->o.verify_dump)
313 * Dump the contents we just read off disk
315 hdr_offset = vc->hdr_num * hdr->len;
317 dump_buf(io_u->buf + hdr_offset, hdr->len, io_u->offset + hdr_offset,
318 "received", vc->io_u->file);
321 * Allocate a new buf and re-generate the original data
323 buf = malloc(io_u->buflen);
326 dummy.rand_seed = hdr->rand_seed;
327 dummy.buf_filled_len = 0;
328 dummy.buflen = io_u->buflen;
330 fill_pattern_headers(td, &dummy, hdr->rand_seed, 1);
332 dump_buf(buf + hdr_offset, hdr->len, io_u->offset + hdr_offset,
333 "expected", vc->io_u->file);
337 static void dump_verify_buffers(struct verify_header *hdr, struct vcont *vc)
339 struct thread_data *td = vc->td;
340 struct verify_header shdr;
342 if (td->o.verify == VERIFY_PATTERN_NO_HDR) {
343 __fill_hdr(td, vc->io_u, &shdr, 0, vc->io_u->buflen, 0);
347 __dump_verify_buffers(hdr, vc);
350 static void log_verify_failure(struct verify_header *hdr, struct vcont *vc)
352 unsigned long long offset;
354 offset = vc->io_u->offset;
355 offset += vc->hdr_num * hdr->len;
356 log_err("%.8s: verify failed at file %s offset %llu, length %u\n",
357 vc->name, vc->io_u->file->file_name, offset, hdr->len);
359 if (vc->good_crc && vc->bad_crc) {
360 log_err(" Expected CRC: ");
361 hexdump(vc->good_crc, vc->crc_len);
362 log_err(" Received CRC: ");
363 hexdump(vc->bad_crc, vc->crc_len);
366 dump_verify_buffers(hdr, vc);
370 * Return data area 'header_num'
372 static inline void *io_u_verify_off(struct verify_header *hdr, struct vcont *vc)
374 return vc->io_u->buf + vc->hdr_num * hdr->len + hdr_size(vc->td, hdr);
377 static int verify_io_u_pattern(struct verify_header *hdr, struct vcont *vc)
379 struct thread_data *td = vc->td;
380 struct io_u *io_u = vc->io_u;
382 unsigned int header_size = __hdr_size(td->o.verify);
383 unsigned int len, mod, i, pattern_size;
386 pattern = td->o.verify_pattern;
387 pattern_size = td->o.verify_pattern_bytes;
388 assert(pattern_size != 0);
390 (void)paste_format_inplace(pattern, pattern_size,
391 td->o.verify_fmt, td->o.verify_fmt_sz, io_u);
393 buf = (char *) hdr + header_size;
394 len = get_hdr_inc(td, io_u) - header_size;
395 mod = (get_hdr_inc(td, io_u) * vc->hdr_num + header_size) % pattern_size;
397 rc = cmp_pattern(pattern, pattern_size, mod, buf, len);
401 /* Slow path, compare each byte */
402 for (i = 0; i < len; i++) {
403 if (buf[i] != pattern[mod]) {
406 bits = hweight8(buf[i] ^ pattern[mod]);
407 log_err("fio: got pattern '%02x', wanted '%02x'. Bad bits %d\n",
408 (unsigned char)buf[i],
409 (unsigned char)pattern[mod],
411 log_err("fio: bad pattern block offset %u\n", i);
412 vc->name = "pattern";
413 log_verify_failure(hdr, vc);
417 if (mod == td->o.verify_pattern_bytes)
421 /* Unreachable line */
426 static int verify_io_u_xxhash(struct verify_header *hdr, struct vcont *vc)
428 void *p = io_u_verify_off(hdr, vc);
429 struct vhdr_xxhash *vh = hdr_priv(hdr);
433 dprint(FD_VERIFY, "xxhash verify io_u %p, len %u\n", vc->io_u, hdr->len);
435 state = XXH32_init(1);
436 XXH32_update(state, p, hdr->len - hdr_size(vc->td, hdr));
437 hash = XXH32_digest(state);
439 if (vh->hash == hash)
443 vc->good_crc = &vh->hash;
445 vc->crc_len = sizeof(hash);
446 log_verify_failure(hdr, vc);
450 static int verify_io_u_sha3(struct verify_header *hdr, struct vcont *vc,
451 struct fio_sha3_ctx *sha3_ctx, uint8_t *sha,
452 unsigned int sha_size, const char *name)
454 void *p = io_u_verify_off(hdr, vc);
456 dprint(FD_VERIFY, "%s verify io_u %p, len %u\n", name, vc->io_u, hdr->len);
458 fio_sha3_update(sha3_ctx, p, hdr->len - hdr_size(vc->td, hdr));
459 fio_sha3_final(sha3_ctx);
461 if (!memcmp(sha, sha3_ctx->sha, sha_size))
466 vc->bad_crc = sha3_ctx->sha;
467 vc->crc_len = sha_size;
468 log_verify_failure(hdr, vc);
472 static int verify_io_u_sha3_224(struct verify_header *hdr, struct vcont *vc)
474 struct vhdr_sha3_224 *vh = hdr_priv(hdr);
475 uint8_t sha[SHA3_224_DIGEST_SIZE];
476 struct fio_sha3_ctx sha3_ctx = {
480 fio_sha3_224_init(&sha3_ctx);
482 return verify_io_u_sha3(hdr, vc, &sha3_ctx, vh->sha,
483 SHA3_224_DIGEST_SIZE, "sha3-224");
486 static int verify_io_u_sha3_256(struct verify_header *hdr, struct vcont *vc)
488 struct vhdr_sha3_256 *vh = hdr_priv(hdr);
489 uint8_t sha[SHA3_256_DIGEST_SIZE];
490 struct fio_sha3_ctx sha3_ctx = {
494 fio_sha3_256_init(&sha3_ctx);
496 return verify_io_u_sha3(hdr, vc, &sha3_ctx, vh->sha,
497 SHA3_256_DIGEST_SIZE, "sha3-256");
500 static int verify_io_u_sha3_384(struct verify_header *hdr, struct vcont *vc)
502 struct vhdr_sha3_384 *vh = hdr_priv(hdr);
503 uint8_t sha[SHA3_384_DIGEST_SIZE];
504 struct fio_sha3_ctx sha3_ctx = {
508 fio_sha3_384_init(&sha3_ctx);
510 return verify_io_u_sha3(hdr, vc, &sha3_ctx, vh->sha,
511 SHA3_384_DIGEST_SIZE, "sha3-384");
514 static int verify_io_u_sha3_512(struct verify_header *hdr, struct vcont *vc)
516 struct vhdr_sha3_512 *vh = hdr_priv(hdr);
517 uint8_t sha[SHA3_512_DIGEST_SIZE];
518 struct fio_sha3_ctx sha3_ctx = {
522 fio_sha3_512_init(&sha3_ctx);
524 return verify_io_u_sha3(hdr, vc, &sha3_ctx, vh->sha,
525 SHA3_512_DIGEST_SIZE, "sha3-512");
528 static int verify_io_u_sha512(struct verify_header *hdr, struct vcont *vc)
530 void *p = io_u_verify_off(hdr, vc);
531 struct vhdr_sha512 *vh = hdr_priv(hdr);
533 struct fio_sha512_ctx sha512_ctx = {
537 dprint(FD_VERIFY, "sha512 verify io_u %p, len %u\n", vc->io_u, hdr->len);
539 fio_sha512_init(&sha512_ctx);
540 fio_sha512_update(&sha512_ctx, p, hdr->len - hdr_size(vc->td, hdr));
542 if (!memcmp(vh->sha512, sha512_ctx.buf, sizeof(sha512)))
546 vc->good_crc = vh->sha512;
547 vc->bad_crc = sha512_ctx.buf;
548 vc->crc_len = sizeof(vh->sha512);
549 log_verify_failure(hdr, vc);
553 static int verify_io_u_sha256(struct verify_header *hdr, struct vcont *vc)
555 void *p = io_u_verify_off(hdr, vc);
556 struct vhdr_sha256 *vh = hdr_priv(hdr);
558 struct fio_sha256_ctx sha256_ctx = {
562 dprint(FD_VERIFY, "sha256 verify io_u %p, len %u\n", vc->io_u, hdr->len);
564 fio_sha256_init(&sha256_ctx);
565 fio_sha256_update(&sha256_ctx, p, hdr->len - hdr_size(vc->td, hdr));
566 fio_sha256_final(&sha256_ctx);
568 if (!memcmp(vh->sha256, sha256_ctx.buf, sizeof(sha256)))
572 vc->good_crc = vh->sha256;
573 vc->bad_crc = sha256_ctx.buf;
574 vc->crc_len = sizeof(vh->sha256);
575 log_verify_failure(hdr, vc);
579 static int verify_io_u_sha1(struct verify_header *hdr, struct vcont *vc)
581 void *p = io_u_verify_off(hdr, vc);
582 struct vhdr_sha1 *vh = hdr_priv(hdr);
584 struct fio_sha1_ctx sha1_ctx = {
588 dprint(FD_VERIFY, "sha1 verify io_u %p, len %u\n", vc->io_u, hdr->len);
590 fio_sha1_init(&sha1_ctx);
591 fio_sha1_update(&sha1_ctx, p, hdr->len - hdr_size(vc->td, hdr));
592 fio_sha1_final(&sha1_ctx);
594 if (!memcmp(vh->sha1, sha1_ctx.H, sizeof(sha1)))
598 vc->good_crc = vh->sha1;
599 vc->bad_crc = sha1_ctx.H;
600 vc->crc_len = sizeof(vh->sha1);
601 log_verify_failure(hdr, vc);
605 static int verify_io_u_crc7(struct verify_header *hdr, struct vcont *vc)
607 void *p = io_u_verify_off(hdr, vc);
608 struct vhdr_crc7 *vh = hdr_priv(hdr);
611 dprint(FD_VERIFY, "crc7 verify io_u %p, len %u\n", vc->io_u, hdr->len);
613 c = fio_crc7(p, hdr->len - hdr_size(vc->td, hdr));
619 vc->good_crc = &vh->crc7;
622 log_verify_failure(hdr, vc);
626 static int verify_io_u_crc16(struct verify_header *hdr, struct vcont *vc)
628 void *p = io_u_verify_off(hdr, vc);
629 struct vhdr_crc16 *vh = hdr_priv(hdr);
632 dprint(FD_VERIFY, "crc16 verify io_u %p, len %u\n", vc->io_u, hdr->len);
634 c = fio_crc16(p, hdr->len - hdr_size(vc->td, hdr));
640 vc->good_crc = &vh->crc16;
643 log_verify_failure(hdr, vc);
647 static int verify_io_u_crc64(struct verify_header *hdr, struct vcont *vc)
649 void *p = io_u_verify_off(hdr, vc);
650 struct vhdr_crc64 *vh = hdr_priv(hdr);
651 unsigned long long c;
653 dprint(FD_VERIFY, "crc64 verify io_u %p, len %u\n", vc->io_u, hdr->len);
655 c = fio_crc64(p, hdr->len - hdr_size(vc->td, hdr));
661 vc->good_crc = &vh->crc64;
664 log_verify_failure(hdr, vc);
668 static int verify_io_u_crc32(struct verify_header *hdr, struct vcont *vc)
670 void *p = io_u_verify_off(hdr, vc);
671 struct vhdr_crc32 *vh = hdr_priv(hdr);
674 dprint(FD_VERIFY, "crc32 verify io_u %p, len %u\n", vc->io_u, hdr->len);
676 c = fio_crc32(p, hdr->len - hdr_size(vc->td, hdr));
682 vc->good_crc = &vh->crc32;
685 log_verify_failure(hdr, vc);
689 static int verify_io_u_crc32c(struct verify_header *hdr, struct vcont *vc)
691 void *p = io_u_verify_off(hdr, vc);
692 struct vhdr_crc32 *vh = hdr_priv(hdr);
695 dprint(FD_VERIFY, "crc32c verify io_u %p, len %u\n", vc->io_u, hdr->len);
697 c = fio_crc32c(p, hdr->len - hdr_size(vc->td, hdr));
703 vc->good_crc = &vh->crc32;
706 log_verify_failure(hdr, vc);
710 static int verify_io_u_md5(struct verify_header *hdr, struct vcont *vc)
712 void *p = io_u_verify_off(hdr, vc);
713 struct vhdr_md5 *vh = hdr_priv(hdr);
714 uint32_t hash[MD5_HASH_WORDS];
715 struct fio_md5_ctx md5_ctx = {
719 dprint(FD_VERIFY, "md5 verify io_u %p, len %u\n", vc->io_u, hdr->len);
721 fio_md5_init(&md5_ctx);
722 fio_md5_update(&md5_ctx, p, hdr->len - hdr_size(vc->td, hdr));
723 fio_md5_final(&md5_ctx);
725 if (!memcmp(vh->md5_digest, md5_ctx.hash, sizeof(hash)))
729 vc->good_crc = vh->md5_digest;
730 vc->bad_crc = md5_ctx.hash;
731 vc->crc_len = sizeof(hash);
732 log_verify_failure(hdr, vc);
737 * Push IO verification to a separate thread
739 int verify_io_u_async(struct thread_data *td, struct io_u **io_u_ptr)
741 struct io_u *io_u = *io_u_ptr;
743 pthread_mutex_lock(&td->io_u_lock);
746 put_file_log(td, io_u->file);
748 if (io_u->flags & IO_U_F_IN_CUR_DEPTH) {
750 io_u_clear(td, io_u, IO_U_F_IN_CUR_DEPTH);
752 flist_add_tail(&io_u->verify_list, &td->verify_list);
754 pthread_mutex_unlock(&td->io_u_lock);
756 pthread_cond_signal(&td->verify_cond);
761 * Thanks Rusty, for spending the time so I don't have to.
763 * http://rusty.ozlabs.org/?p=560
765 static int mem_is_zero(const void *data, size_t length)
767 const unsigned char *p = data;
770 /* Check first 16 bytes manually */
771 for (len = 0; len < 16; len++) {
780 /* Now we know that's zero, memcmp with self. */
781 return memcmp(data, p, length) == 0;
784 static int mem_is_zero_slow(const void *data, size_t length, size_t *offset)
786 const unsigned char *p = data;
800 static int verify_trimmed_io_u(struct thread_data *td, struct io_u *io_u)
804 if (!td->o.trim_zero)
807 if (mem_is_zero(io_u->buf, io_u->buflen))
810 mem_is_zero_slow(io_u->buf, io_u->buflen, &offset);
812 log_err("trim: verify failed at file %s offset %llu, length %lu"
813 ", block offset %lu\n",
814 io_u->file->file_name, io_u->offset, io_u->buflen,
815 (unsigned long) offset);
819 static int verify_header(struct io_u *io_u, struct thread_data *td,
820 struct verify_header *hdr, unsigned int hdr_num,
821 unsigned int hdr_len)
826 if (hdr->magic != FIO_HDR_MAGIC) {
827 log_err("verify: bad magic header %x, wanted %x",
828 hdr->magic, FIO_HDR_MAGIC);
831 if (hdr->len != hdr_len) {
832 log_err("verify: bad header length %u, wanted %u",
836 if (hdr->rand_seed != io_u->rand_seed) {
837 log_err("verify: bad header rand_seed %"PRIu64
839 hdr->rand_seed, io_u->rand_seed);
842 if (hdr->offset != io_u->offset + hdr_num * td->o.verify_interval) {
843 log_err("verify: bad header offset %"PRIu64
845 hdr->offset, io_u->offset);
850 * For read-only workloads, the program cannot be certain of the
851 * last numberio written to a block. Checking of numberio will be
852 * done only for workloads that write data. For verify_only,
853 * numberio will be checked in the last iteration when the correct
854 * state of numberio, that would have been written to each block
855 * in a previous run of fio, has been reached.
857 if (td_write(td) && (td_min_bs(td) == td_max_bs(td)) &&
859 if (!td->o.verify_only || td->o.loops == 0)
860 if (hdr->numberio != io_u->numberio) {
861 log_err("verify: bad header numberio %"PRIu16
863 hdr->numberio, io_u->numberio);
867 crc = fio_crc32c(p, offsetof(struct verify_header, crc32));
868 if (crc != hdr->crc32) {
869 log_err("verify: bad header crc %x, calculated %x",
876 log_err(" at file %s offset %llu, length %u\n",
877 io_u->file->file_name,
878 io_u->offset + hdr_num * hdr_len, hdr_len);
880 if (td->o.verify_dump)
881 dump_buf(p, hdr_len, io_u->offset + hdr_num * hdr_len,
882 "hdr_fail", io_u->file);
887 int verify_io_u(struct thread_data *td, struct io_u **io_u_ptr)
889 struct verify_header *hdr;
890 struct io_u *io_u = *io_u_ptr;
891 unsigned int header_size, hdr_inc, hdr_num = 0;
895 if (td->o.verify == VERIFY_NULL || io_u->ddir != DDIR_READ)
898 * If the IO engine is faking IO (like null), then just pretend
899 * we verified everything.
901 if (td_ioengine_flagged(td, FIO_FAKEIO))
904 if (io_u->flags & IO_U_F_TRIMMED) {
905 ret = verify_trimmed_io_u(td, io_u);
909 hdr_inc = get_hdr_inc(td, io_u);
912 for (p = io_u->buf; p < io_u->buf + io_u->buflen;
913 p += hdr_inc, hdr_num++) {
919 unsigned int verify_type;
921 if (ret && td->o.verify_fatal)
924 header_size = __hdr_size(td->o.verify);
925 if (td->o.verify_offset)
926 memswp(p, p + td->o.verify_offset, header_size);
930 * Make rand_seed check pass when have verifysort or
933 if (td->o.verifysort || (td->flags & TD_F_VER_BACKLOG))
934 io_u->rand_seed = hdr->rand_seed;
936 if (td->o.verify != VERIFY_PATTERN_NO_HDR) {
937 ret = verify_header(io_u, td, hdr, hdr_num, hdr_inc);
942 if (td->o.verify != VERIFY_NONE)
943 verify_type = td->o.verify;
945 verify_type = hdr->verify_type;
947 switch (verify_type) {
948 case VERIFY_HDR_ONLY:
949 /* Header is always verified, check if pattern is left
950 * for verification. */
951 if (td->o.verify_pattern_bytes)
952 ret = verify_io_u_pattern(hdr, &vc);
955 ret = verify_io_u_md5(hdr, &vc);
958 ret = verify_io_u_crc64(hdr, &vc);
961 case VERIFY_CRC32C_INTEL:
962 ret = verify_io_u_crc32c(hdr, &vc);
965 ret = verify_io_u_crc32(hdr, &vc);
968 ret = verify_io_u_crc16(hdr, &vc);
971 ret = verify_io_u_crc7(hdr, &vc);
974 ret = verify_io_u_sha256(hdr, &vc);
977 ret = verify_io_u_sha512(hdr, &vc);
979 case VERIFY_SHA3_224:
980 ret = verify_io_u_sha3_224(hdr, &vc);
982 case VERIFY_SHA3_256:
983 ret = verify_io_u_sha3_256(hdr, &vc);
985 case VERIFY_SHA3_384:
986 ret = verify_io_u_sha3_384(hdr, &vc);
988 case VERIFY_SHA3_512:
989 ret = verify_io_u_sha3_512(hdr, &vc);
992 ret = verify_io_u_xxhash(hdr, &vc);
995 ret = verify_io_u_sha1(hdr, &vc);
998 case VERIFY_PATTERN_NO_HDR:
999 ret = verify_io_u_pattern(hdr, &vc);
1002 log_err("Bad verify type %u\n", hdr->verify_type);
1006 if (ret && verify_type != hdr->verify_type)
1007 log_err("fio: verify type mismatch (%u media, %u given)\n",
1008 hdr->verify_type, verify_type);
1012 if (ret && td->o.verify_fatal)
1013 fio_mark_td_terminate(td);
1018 static void fill_xxhash(struct verify_header *hdr, void *p, unsigned int len)
1020 struct vhdr_xxhash *vh = hdr_priv(hdr);
1023 state = XXH32_init(1);
1024 XXH32_update(state, p, len);
1025 vh->hash = XXH32_digest(state);
1028 static void fill_sha3(struct fio_sha3_ctx *sha3_ctx, void *p, unsigned int len)
1030 fio_sha3_update(sha3_ctx, p, len);
1031 fio_sha3_final(sha3_ctx);
1034 static void fill_sha3_224(struct verify_header *hdr, void *p, unsigned int len)
1036 struct vhdr_sha3_224 *vh = hdr_priv(hdr);
1037 struct fio_sha3_ctx sha3_ctx = {
1041 fio_sha3_224_init(&sha3_ctx);
1042 fill_sha3(&sha3_ctx, p, len);
1045 static void fill_sha3_256(struct verify_header *hdr, void *p, unsigned int len)
1047 struct vhdr_sha3_256 *vh = hdr_priv(hdr);
1048 struct fio_sha3_ctx sha3_ctx = {
1052 fio_sha3_256_init(&sha3_ctx);
1053 fill_sha3(&sha3_ctx, p, len);
1056 static void fill_sha3_384(struct verify_header *hdr, void *p, unsigned int len)
1058 struct vhdr_sha3_384 *vh = hdr_priv(hdr);
1059 struct fio_sha3_ctx sha3_ctx = {
1063 fio_sha3_384_init(&sha3_ctx);
1064 fill_sha3(&sha3_ctx, p, len);
1067 static void fill_sha3_512(struct verify_header *hdr, void *p, unsigned int len)
1069 struct vhdr_sha3_512 *vh = hdr_priv(hdr);
1070 struct fio_sha3_ctx sha3_ctx = {
1074 fio_sha3_512_init(&sha3_ctx);
1075 fill_sha3(&sha3_ctx, p, len);
1078 static void fill_sha512(struct verify_header *hdr, void *p, unsigned int len)
1080 struct vhdr_sha512 *vh = hdr_priv(hdr);
1081 struct fio_sha512_ctx sha512_ctx = {
1085 fio_sha512_init(&sha512_ctx);
1086 fio_sha512_update(&sha512_ctx, p, len);
1089 static void fill_sha256(struct verify_header *hdr, void *p, unsigned int len)
1091 struct vhdr_sha256 *vh = hdr_priv(hdr);
1092 struct fio_sha256_ctx sha256_ctx = {
1096 fio_sha256_init(&sha256_ctx);
1097 fio_sha256_update(&sha256_ctx, p, len);
1098 fio_sha256_final(&sha256_ctx);
1101 static void fill_sha1(struct verify_header *hdr, void *p, unsigned int len)
1103 struct vhdr_sha1 *vh = hdr_priv(hdr);
1104 struct fio_sha1_ctx sha1_ctx = {
1108 fio_sha1_init(&sha1_ctx);
1109 fio_sha1_update(&sha1_ctx, p, len);
1110 fio_sha1_final(&sha1_ctx);
1113 static void fill_crc7(struct verify_header *hdr, void *p, unsigned int len)
1115 struct vhdr_crc7 *vh = hdr_priv(hdr);
1117 vh->crc7 = fio_crc7(p, len);
1120 static void fill_crc16(struct verify_header *hdr, void *p, unsigned int len)
1122 struct vhdr_crc16 *vh = hdr_priv(hdr);
1124 vh->crc16 = fio_crc16(p, len);
1127 static void fill_crc32(struct verify_header *hdr, void *p, unsigned int len)
1129 struct vhdr_crc32 *vh = hdr_priv(hdr);
1131 vh->crc32 = fio_crc32(p, len);
1134 static void fill_crc32c(struct verify_header *hdr, void *p, unsigned int len)
1136 struct vhdr_crc32 *vh = hdr_priv(hdr);
1138 vh->crc32 = fio_crc32c(p, len);
1141 static void fill_crc64(struct verify_header *hdr, void *p, unsigned int len)
1143 struct vhdr_crc64 *vh = hdr_priv(hdr);
1145 vh->crc64 = fio_crc64(p, len);
1148 static void fill_md5(struct verify_header *hdr, void *p, unsigned int len)
1150 struct vhdr_md5 *vh = hdr_priv(hdr);
1151 struct fio_md5_ctx md5_ctx = {
1152 .hash = (uint32_t *) vh->md5_digest,
1155 fio_md5_init(&md5_ctx);
1156 fio_md5_update(&md5_ctx, p, len);
1157 fio_md5_final(&md5_ctx);
1160 static void __fill_hdr(struct thread_data *td, struct io_u *io_u,
1161 struct verify_header *hdr, unsigned int header_num,
1162 unsigned int header_len, uint64_t rand_seed)
1166 hdr->magic = FIO_HDR_MAGIC;
1167 hdr->verify_type = td->o.verify;
1168 hdr->len = header_len;
1169 hdr->rand_seed = rand_seed;
1170 hdr->offset = io_u->offset + header_num * td->o.verify_interval;
1171 hdr->time_sec = io_u->start_time.tv_sec;
1172 hdr->time_nsec = io_u->start_time.tv_nsec;
1173 hdr->thread = td->thread_number;
1174 hdr->numberio = io_u->numberio;
1175 hdr->crc32 = fio_crc32c(p, offsetof(struct verify_header, crc32));
1179 static void fill_hdr(struct thread_data *td, struct io_u *io_u,
1180 struct verify_header *hdr, unsigned int header_num,
1181 unsigned int header_len, uint64_t rand_seed)
1183 if (td->o.verify != VERIFY_PATTERN_NO_HDR)
1184 __fill_hdr(td, io_u, hdr, header_num, header_len, rand_seed);
1187 static void populate_hdr(struct thread_data *td, struct io_u *io_u,
1188 struct verify_header *hdr, unsigned int header_num,
1189 unsigned int header_len)
1191 unsigned int data_len;
1197 fill_hdr(td, io_u, hdr, header_num, header_len, io_u->rand_seed);
1199 data_len = header_len - hdr_size(td, hdr);
1201 data = p + hdr_size(td, hdr);
1202 switch (td->o.verify) {
1204 dprint(FD_VERIFY, "fill md5 io_u %p, len %u\n",
1206 fill_md5(hdr, data, data_len);
1209 dprint(FD_VERIFY, "fill crc64 io_u %p, len %u\n",
1211 fill_crc64(hdr, data, data_len);
1214 case VERIFY_CRC32C_INTEL:
1215 dprint(FD_VERIFY, "fill crc32c io_u %p, len %u\n",
1217 fill_crc32c(hdr, data, data_len);
1220 dprint(FD_VERIFY, "fill crc32 io_u %p, len %u\n",
1222 fill_crc32(hdr, data, data_len);
1225 dprint(FD_VERIFY, "fill crc16 io_u %p, len %u\n",
1227 fill_crc16(hdr, data, data_len);
1230 dprint(FD_VERIFY, "fill crc7 io_u %p, len %u\n",
1232 fill_crc7(hdr, data, data_len);
1235 dprint(FD_VERIFY, "fill sha256 io_u %p, len %u\n",
1237 fill_sha256(hdr, data, data_len);
1240 dprint(FD_VERIFY, "fill sha512 io_u %p, len %u\n",
1242 fill_sha512(hdr, data, data_len);
1244 case VERIFY_SHA3_224:
1245 dprint(FD_VERIFY, "fill sha3-224 io_u %p, len %u\n",
1247 fill_sha3_224(hdr, data, data_len);
1249 case VERIFY_SHA3_256:
1250 dprint(FD_VERIFY, "fill sha3-256 io_u %p, len %u\n",
1252 fill_sha3_256(hdr, data, data_len);
1254 case VERIFY_SHA3_384:
1255 dprint(FD_VERIFY, "fill sha3-384 io_u %p, len %u\n",
1257 fill_sha3_384(hdr, data, data_len);
1259 case VERIFY_SHA3_512:
1260 dprint(FD_VERIFY, "fill sha3-512 io_u %p, len %u\n",
1262 fill_sha3_512(hdr, data, data_len);
1265 dprint(FD_VERIFY, "fill xxhash io_u %p, len %u\n",
1267 fill_xxhash(hdr, data, data_len);
1270 dprint(FD_VERIFY, "fill sha1 io_u %p, len %u\n",
1272 fill_sha1(hdr, data, data_len);
1274 case VERIFY_HDR_ONLY:
1275 case VERIFY_PATTERN:
1276 case VERIFY_PATTERN_NO_HDR:
1277 /* nothing to do here */
1280 log_err("fio: bad verify type: %d\n", td->o.verify);
1284 if (td->o.verify_offset && hdr_size(td, hdr))
1285 memswp(p, p + td->o.verify_offset, hdr_size(td, hdr));
1289 * fill body of io_u->buf with random data and add a header with the
1290 * checksum of choice
1292 void populate_verify_io_u(struct thread_data *td, struct io_u *io_u)
1294 if (td->o.verify == VERIFY_NULL)
1297 io_u->numberio = td->io_issues[io_u->ddir];
1299 fill_pattern_headers(td, io_u, 0, 0);
1302 int get_next_verify(struct thread_data *td, struct io_u *io_u)
1304 struct io_piece *ipo = NULL;
1307 * this io_u is from a requeue, we already filled the offsets
1312 if (!RB_EMPTY_ROOT(&td->io_hist_tree)) {
1313 struct rb_node *n = rb_first(&td->io_hist_tree);
1315 ipo = rb_entry(n, struct io_piece, rb_node);
1318 * Ensure that the associated IO has completed
1321 if (ipo->flags & IP_F_IN_FLIGHT)
1324 rb_erase(n, &td->io_hist_tree);
1325 assert(ipo->flags & IP_F_ONRB);
1326 ipo->flags &= ~IP_F_ONRB;
1327 } else if (!flist_empty(&td->io_hist_list)) {
1328 ipo = flist_first_entry(&td->io_hist_list, struct io_piece, list);
1331 * Ensure that the associated IO has completed
1334 if (ipo->flags & IP_F_IN_FLIGHT)
1337 flist_del(&ipo->list);
1338 assert(ipo->flags & IP_F_ONLIST);
1339 ipo->flags &= ~IP_F_ONLIST;
1345 io_u->offset = ipo->offset;
1346 io_u->buflen = ipo->len;
1347 io_u->numberio = ipo->numberio;
1348 io_u->file = ipo->file;
1349 io_u_set(td, io_u, IO_U_F_VER_LIST);
1351 if (ipo->flags & IP_F_TRIMMED)
1352 io_u_set(td, io_u, IO_U_F_TRIMMED);
1354 if (!fio_file_open(io_u->file)) {
1355 int r = td_io_open_file(td, io_u->file);
1358 dprint(FD_VERIFY, "failed file %s open\n",
1359 io_u->file->file_name);
1364 get_file(ipo->file);
1365 assert(fio_file_open(io_u->file));
1366 io_u->ddir = DDIR_READ;
1367 io_u->xfer_buf = io_u->buf;
1368 io_u->xfer_buflen = io_u->buflen;
1370 remove_trim_entry(td, ipo);
1372 dprint(FD_VERIFY, "get_next_verify: ret io_u %p\n", io_u);
1374 if (!td->o.verify_pattern_bytes) {
1375 io_u->rand_seed = __rand(&td->verify_state);
1376 if (sizeof(int) != sizeof(long *))
1377 io_u->rand_seed *= __rand(&td->verify_state);
1383 dprint(FD_VERIFY, "get_next_verify: empty\n");
1387 void fio_verify_init(struct thread_data *td)
1389 if (td->o.verify == VERIFY_CRC32C_INTEL ||
1390 td->o.verify == VERIFY_CRC32C) {
1391 crc32c_arm64_probe();
1392 crc32c_intel_probe();
1396 static void *verify_async_thread(void *data)
1398 struct thread_data *td = data;
1402 if (fio_option_is_set(&td->o, verify_cpumask) &&
1403 fio_setaffinity(td->pid, td->o.verify_cpumask)) {
1404 log_err("fio: failed setting verify thread affinity\n");
1412 if (td->verify_thread_exit)
1415 pthread_mutex_lock(&td->io_u_lock);
1417 while (flist_empty(&td->verify_list) &&
1418 !td->verify_thread_exit) {
1419 ret = pthread_cond_wait(&td->verify_cond,
1422 pthread_mutex_unlock(&td->io_u_lock);
1427 flist_splice_init(&td->verify_list, &list);
1428 pthread_mutex_unlock(&td->io_u_lock);
1430 if (flist_empty(&list))
1433 while (!flist_empty(&list)) {
1434 io_u = flist_first_entry(&list, struct io_u, verify_list);
1435 flist_del_init(&io_u->verify_list);
1437 io_u_set(td, io_u, IO_U_F_NO_FILE_PUT);
1438 ret = verify_io_u(td, &io_u);
1443 if (td_non_fatal_error(td, ERROR_TYPE_VERIFY_BIT, ret)) {
1444 update_error_count(td, ret);
1452 td_verror(td, ret, "async_verify");
1453 if (td->o.verify_fatal)
1454 fio_mark_td_terminate(td);
1458 pthread_mutex_lock(&td->io_u_lock);
1459 td->nr_verify_threads--;
1460 pthread_mutex_unlock(&td->io_u_lock);
1462 pthread_cond_signal(&td->free_cond);
1466 int verify_async_init(struct thread_data *td)
1469 pthread_attr_t attr;
1471 pthread_attr_init(&attr);
1472 pthread_attr_setstacksize(&attr, 2 * PTHREAD_STACK_MIN);
1474 td->verify_thread_exit = 0;
1476 td->verify_threads = malloc(sizeof(pthread_t) * td->o.verify_async);
1477 for (i = 0; i < td->o.verify_async; i++) {
1478 ret = pthread_create(&td->verify_threads[i], &attr,
1479 verify_async_thread, td);
1481 log_err("fio: async verify creation failed: %s\n",
1485 ret = pthread_detach(td->verify_threads[i]);
1487 log_err("fio: async verify thread detach failed: %s\n",
1491 td->nr_verify_threads++;
1494 pthread_attr_destroy(&attr);
1496 if (i != td->o.verify_async) {
1497 log_err("fio: only %d verify threads started, exiting\n", i);
1498 td->verify_thread_exit = 1;
1500 pthread_cond_broadcast(&td->verify_cond);
1507 void verify_async_exit(struct thread_data *td)
1509 td->verify_thread_exit = 1;
1511 pthread_cond_broadcast(&td->verify_cond);
1513 pthread_mutex_lock(&td->io_u_lock);
1515 while (td->nr_verify_threads)
1516 pthread_cond_wait(&td->free_cond, &td->io_u_lock);
1518 pthread_mutex_unlock(&td->io_u_lock);
1519 free(td->verify_threads);
1520 td->verify_threads = NULL;
1523 int paste_blockoff(char *buf, unsigned int len, void *priv)
1525 struct io_u *io = priv;
1526 unsigned long long off;
1528 typecheck(typeof(off), io->offset);
1529 off = cpu_to_le64((uint64_t)io->offset);
1530 len = min(len, (unsigned int)sizeof(off));
1531 memcpy(buf, &off, len);
1535 static int __fill_file_completions(struct thread_data *td,
1536 struct thread_io_list *s,
1537 struct fio_file *f, unsigned int *index)
1542 if (!f->last_write_comp)
1545 if (td->io_blocks[DDIR_WRITE] < td->o.iodepth)
1546 comps = td->io_blocks[DDIR_WRITE];
1548 comps = td->o.iodepth;
1550 j = f->last_write_idx - 1;
1551 for (i = 0; i < comps; i++) {
1553 j = td->o.iodepth - 1;
1554 s->comps[*index].fileno = __cpu_to_le64(f->fileno);
1555 s->comps[*index].offset = cpu_to_le64(f->last_write_comp[j]);
1563 static int fill_file_completions(struct thread_data *td,
1564 struct thread_io_list *s, unsigned int *index)
1570 for_each_file(td, f, i)
1571 comps += __fill_file_completions(td, s, f, index);
1576 struct all_io_list *get_all_io_list(int save_mask, size_t *sz)
1578 struct all_io_list *rep;
1579 struct thread_data *td;
1584 compiletime_assert(sizeof(struct all_io_list) == 8, "all_io_list");
1587 * Calculate reply space needed. We need one 'io_state' per thread,
1588 * and the size will vary depending on depth.
1592 for_each_td(td, i) {
1593 if (save_mask != IO_LIST_ALL && (i + 1) != save_mask)
1596 td->flags |= TD_F_VSTATE_SAVED;
1597 depth += (td->o.iodepth * td->o.nr_files);
1605 *sz += nr * sizeof(struct thread_io_list);
1606 *sz += depth * sizeof(struct file_comp);
1608 memset(rep, 0, *sz);
1610 rep->threads = cpu_to_le64((uint64_t) nr);
1612 next = &rep->state[0];
1613 for_each_td(td, i) {
1614 struct thread_io_list *s = next;
1615 unsigned int comps, index = 0;
1617 if (save_mask != IO_LIST_ALL && (i + 1) != save_mask)
1620 comps = fill_file_completions(td, s, &index);
1622 s->no_comps = cpu_to_le64((uint64_t) comps);
1623 s->depth = cpu_to_le64((uint64_t) td->o.iodepth);
1624 s->nofiles = cpu_to_le64((uint64_t) td->o.nr_files);
1625 s->numberio = cpu_to_le64((uint64_t) td->io_issues[DDIR_WRITE]);
1626 s->index = cpu_to_le64((uint64_t) i);
1627 if (td->random_state.use64) {
1628 s->rand.state64.s[0] = cpu_to_le64(td->random_state.state64.s1);
1629 s->rand.state64.s[1] = cpu_to_le64(td->random_state.state64.s2);
1630 s->rand.state64.s[2] = cpu_to_le64(td->random_state.state64.s3);
1631 s->rand.state64.s[3] = cpu_to_le64(td->random_state.state64.s4);
1632 s->rand.state64.s[4] = cpu_to_le64(td->random_state.state64.s5);
1633 s->rand.state64.s[5] = 0;
1634 s->rand.use64 = cpu_to_le64((uint64_t)1);
1636 s->rand.state32.s[0] = cpu_to_le32(td->random_state.state32.s1);
1637 s->rand.state32.s[1] = cpu_to_le32(td->random_state.state32.s2);
1638 s->rand.state32.s[2] = cpu_to_le32(td->random_state.state32.s3);
1639 s->rand.state32.s[3] = 0;
1642 s->name[sizeof(s->name) - 1] = '\0';
1643 strncpy((char *) s->name, td->o.name, sizeof(s->name) - 1);
1644 next = io_list_next(s);
1650 static int open_state_file(const char *name, const char *prefix, int num,
1658 flags = O_CREAT | O_TRUNC | O_WRONLY | O_SYNC;
1662 verify_state_gen_name(out, sizeof(out), name, prefix, num);
1664 fd = open(out, flags, 0644);
1666 perror("fio: open state file");
1667 log_err("fio: state file: %s (for_write=%d)\n", out, for_write);
1674 static int write_thread_list_state(struct thread_io_list *s,
1677 struct verify_state_hdr hdr;
1682 fd = open_state_file((const char *) s->name, prefix, s->index, 1);
1686 crc = fio_crc32c((void *)s, thread_io_list_sz(s));
1688 hdr.version = cpu_to_le64((uint64_t) VSTATE_HDR_VERSION);
1689 hdr.size = cpu_to_le64((uint64_t) thread_io_list_sz(s));
1690 hdr.crc = cpu_to_le64(crc);
1691 ret = write(fd, &hdr, sizeof(hdr));
1692 if (ret != sizeof(hdr))
1695 ret = write(fd, s, thread_io_list_sz(s));
1696 if (ret != thread_io_list_sz(s)) {
1699 perror("fio: write state file");
1700 log_err("fio: failed to write state file\n");
1709 void __verify_save_state(struct all_io_list *state, const char *prefix)
1711 struct thread_io_list *s = &state->state[0];
1714 for (i = 0; i < le64_to_cpu(state->threads); i++) {
1715 write_thread_list_state(s, prefix);
1716 s = io_list_next(s);
1720 void verify_save_state(int mask)
1722 struct all_io_list *state;
1725 state = get_all_io_list(mask, &sz);
1727 char prefix[PATH_MAX];
1730 sprintf(prefix, "%s%clocal", aux_path, FIO_OS_PATH_SEPARATOR);
1732 strcpy(prefix, "local");
1734 __verify_save_state(state, prefix);
1739 void verify_free_state(struct thread_data *td)
1745 void verify_assign_state(struct thread_data *td, void *p)
1747 struct thread_io_list *s = p;
1750 s->no_comps = le64_to_cpu(s->no_comps);
1751 s->depth = le32_to_cpu(s->depth);
1752 s->nofiles = le32_to_cpu(s->nofiles);
1753 s->numberio = le64_to_cpu(s->numberio);
1754 s->rand.use64 = le64_to_cpu(s->rand.use64);
1756 if (s->rand.use64) {
1757 for (i = 0; i < 6; i++)
1758 s->rand.state64.s[i] = le64_to_cpu(s->rand.state64.s[i]);
1760 for (i = 0; i < 4; i++)
1761 s->rand.state32.s[i] = le32_to_cpu(s->rand.state32.s[i]);
1764 for (i = 0; i < s->no_comps; i++) {
1765 s->comps[i].fileno = le64_to_cpu(s->comps[i].fileno);
1766 s->comps[i].offset = le64_to_cpu(s->comps[i].offset);
1772 int verify_state_hdr(struct verify_state_hdr *hdr, struct thread_io_list *s)
1776 hdr->version = le64_to_cpu(hdr->version);
1777 hdr->size = le64_to_cpu(hdr->size);
1778 hdr->crc = le64_to_cpu(hdr->crc);
1780 if (hdr->version != VSTATE_HDR_VERSION)
1783 crc = fio_crc32c((void *)s, hdr->size);
1784 if (crc != hdr->crc)
1790 int verify_load_state(struct thread_data *td, const char *prefix)
1792 struct verify_state_hdr hdr;
1798 if (!td->o.verify_state)
1801 fd = open_state_file(td->o.name, prefix, td->thread_number - 1, 0);
1805 ret = read(fd, &hdr, sizeof(hdr));
1806 if (ret != sizeof(hdr)) {
1808 td_verror(td, errno, "read verify state hdr");
1809 log_err("fio: failed reading verify state header\n");
1813 hdr.version = le64_to_cpu(hdr.version);
1814 hdr.size = le64_to_cpu(hdr.size);
1815 hdr.crc = le64_to_cpu(hdr.crc);
1817 if (hdr.version != VSTATE_HDR_VERSION) {
1818 log_err("fio: unsupported (%d) version in verify state header\n",
1819 (unsigned int) hdr.version);
1823 s = malloc(hdr.size);
1824 ret = read(fd, s, hdr.size);
1825 if (ret != hdr.size) {
1827 td_verror(td, errno, "read verify state");
1828 log_err("fio: failed reading verity state\n");
1832 crc = fio_crc32c(s, hdr.size);
1833 if (crc != hdr.crc) {
1834 log_err("fio: verify state is corrupt\n");
1840 verify_assign_state(td, s);
1850 * Use the loaded verify state to know when to stop doing verification
1852 int verify_state_should_stop(struct thread_data *td, struct io_u *io_u)
1854 struct thread_io_list *s = td->vstate;
1855 struct fio_file *f = io_u->file;
1862 * If we're not into the window of issues - depth yet, continue. If
1863 * issue is shorter than depth, do check.
1865 if ((td->io_blocks[DDIR_READ] < s->depth ||
1866 s->numberio - td->io_blocks[DDIR_READ] > s->depth) &&
1867 s->numberio > s->depth)
1871 * We're in the window of having to check if this io was
1872 * completed or not. If the IO was seen as completed, then
1875 for (i = 0; i < s->no_comps; i++) {
1876 if (s->comps[i].fileno != f->fileno)
1878 if (io_u->offset == s->comps[i].offset)
1883 * Not found, we have to stop