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)
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;
97 static void fill_pattern_headers(struct thread_data *td, struct io_u *io_u,
98 unsigned long seed, int use_seed)
100 unsigned int hdr_inc, header_num;
101 struct verify_header *hdr;
104 fill_verify_pattern(td, p, io_u->buflen, io_u, seed, use_seed);
106 hdr_inc = get_hdr_inc(td, io_u);
108 for (; p < io_u->buf + io_u->buflen; p += hdr_inc) {
110 populate_hdr(td, io_u, hdr, header_num, hdr_inc);
115 static void memswp(void *buf1, void *buf2, unsigned int len)
119 assert(len <= sizeof(swap));
121 memcpy(&swap, buf1, len);
122 memcpy(buf1, buf2, len);
123 memcpy(buf2, &swap, len);
126 static void hexdump(void *buffer, int len)
128 unsigned char *p = buffer;
131 for (i = 0; i < len; i++)
132 log_err("%02x", p[i]);
137 * Prepare for separation of verify_header and checksum header
139 static inline unsigned int __hdr_size(int verify_type)
141 unsigned int len = 0;
143 switch (verify_type) {
145 case VERIFY_HDR_ONLY:
151 len = sizeof(struct vhdr_md5);
154 len = sizeof(struct vhdr_crc64);
158 case VERIFY_CRC32C_INTEL:
159 len = sizeof(struct vhdr_crc32);
162 len = sizeof(struct vhdr_crc16);
165 len = sizeof(struct vhdr_crc7);
168 len = sizeof(struct vhdr_sha256);
171 len = sizeof(struct vhdr_sha512);
173 case VERIFY_SHA3_224:
174 len = sizeof(struct vhdr_sha3_224);
176 case VERIFY_SHA3_256:
177 len = sizeof(struct vhdr_sha3_256);
179 case VERIFY_SHA3_384:
180 len = sizeof(struct vhdr_sha3_384);
182 case VERIFY_SHA3_512:
183 len = sizeof(struct vhdr_sha3_512);
186 len = sizeof(struct vhdr_xxhash);
189 len = sizeof(struct vhdr_sha1);
191 case VERIFY_PATTERN_NO_HDR:
194 log_err("fio: unknown verify header!\n");
198 return len + sizeof(struct verify_header);
201 static inline unsigned int hdr_size(struct thread_data *td,
202 struct verify_header *hdr)
204 if (td->o.verify == VERIFY_PATTERN_NO_HDR)
207 return __hdr_size(hdr->verify_type);
210 static void *hdr_priv(struct verify_header *hdr)
214 return priv + sizeof(struct verify_header);
218 * Verify container, pass info to verify handlers and allow them to
219 * pass info back in case of error
226 unsigned int hdr_num;
227 struct thread_data *td;
230 * Output, only valid in case of error
235 unsigned int crc_len;
238 #define DUMP_BUF_SZ 255
239 static int dump_buf_warned;
241 static void dump_buf(char *buf, unsigned int len, unsigned long long offset,
242 const char *type, struct fio_file *f)
244 char *ptr, fname[DUMP_BUF_SZ];
245 size_t buf_left = DUMP_BUF_SZ;
248 ptr = strdup(f->file_name);
250 memset(fname, 0, sizeof(fname));
252 sprintf(fname, "%s%c", aux_path, FIO_OS_PATH_SEPARATOR);
254 strncpy(fname + strlen(fname), basename(ptr), buf_left - 1);
256 buf_left -= strlen(fname);
258 if (!dump_buf_warned) {
259 log_err("fio: verify failure dump buffer too small\n");
266 snprintf(fname + strlen(fname), buf_left, ".%llu.%s", offset, type);
268 fd = open(fname, O_CREAT | O_TRUNC | O_WRONLY, 0644);
270 perror("open verify buf file");
276 ret = write(fd, buf, len);
280 perror("write verify buf file");
288 log_err(" %s data dumped as %s\n", type, fname);
293 * Dump the contents of the read block and re-generate the correct data
296 static void __dump_verify_buffers(struct verify_header *hdr, struct vcont *vc)
298 struct thread_data *td = vc->td;
299 struct io_u *io_u = vc->io_u;
300 unsigned long hdr_offset;
304 if (!td->o.verify_dump)
308 * Dump the contents we just read off disk
310 hdr_offset = vc->hdr_num * hdr->len;
312 dump_buf(io_u->buf + hdr_offset, hdr->len, io_u->offset + hdr_offset,
313 "received", vc->io_u->file);
316 * Allocate a new buf and re-generate the original data
318 buf = malloc(io_u->buflen);
321 dummy.rand_seed = hdr->rand_seed;
322 dummy.buf_filled_len = 0;
323 dummy.buflen = io_u->buflen;
325 fill_pattern_headers(td, &dummy, hdr->rand_seed, 1);
327 dump_buf(buf + hdr_offset, hdr->len, io_u->offset + hdr_offset,
328 "expected", vc->io_u->file);
332 static void dump_verify_buffers(struct verify_header *hdr, struct vcont *vc)
334 struct thread_data *td = vc->td;
335 struct verify_header shdr;
337 if (td->o.verify == VERIFY_PATTERN_NO_HDR) {
338 __fill_hdr(td, vc->io_u, &shdr, 0, vc->io_u->buflen, 0);
342 __dump_verify_buffers(hdr, vc);
345 static void log_verify_failure(struct verify_header *hdr, struct vcont *vc)
347 unsigned long long offset;
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);
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);
361 dump_verify_buffers(hdr, vc);
365 * Return data area 'header_num'
367 static inline void *io_u_verify_off(struct verify_header *hdr, struct vcont *vc)
369 return vc->io_u->buf + vc->hdr_num * hdr->len + hdr_size(vc->td, hdr);
372 static int verify_io_u_pattern(struct verify_header *hdr, struct vcont *vc)
374 struct thread_data *td = vc->td;
375 struct io_u *io_u = vc->io_u;
377 unsigned int header_size = __hdr_size(td->o.verify);
378 unsigned int len, mod, i, pattern_size;
381 pattern = td->o.verify_pattern;
382 pattern_size = td->o.verify_pattern_bytes;
383 assert(pattern_size != 0);
385 (void)paste_format_inplace(pattern, pattern_size,
386 td->o.verify_fmt, td->o.verify_fmt_sz, io_u);
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;
392 rc = cmp_pattern(pattern, pattern_size, mod, buf, len);
396 /* Slow path, compare each byte */
397 for (i = 0; i < len; i++) {
398 if (buf[i] != pattern[mod]) {
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],
406 log_err("fio: bad pattern block offset %u\n", i);
407 vc->name = "pattern";
408 log_verify_failure(hdr, vc);
412 if (mod == td->o.verify_pattern_bytes)
416 /* Unreachable line */
421 static int verify_io_u_xxhash(struct verify_header *hdr, struct vcont *vc)
423 void *p = io_u_verify_off(hdr, vc);
424 struct vhdr_xxhash *vh = hdr_priv(hdr);
428 dprint(FD_VERIFY, "xxhash verify io_u %p, len %u\n", vc->io_u, hdr->len);
430 state = XXH32_init(1);
431 XXH32_update(state, p, hdr->len - hdr_size(vc->td, hdr));
432 hash = XXH32_digest(state);
434 if (vh->hash == hash)
438 vc->good_crc = &vh->hash;
440 vc->crc_len = sizeof(hash);
441 log_verify_failure(hdr, vc);
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)
449 void *p = io_u_verify_off(hdr, vc);
451 dprint(FD_VERIFY, "%s verify io_u %p, len %u\n", name, vc->io_u, hdr->len);
453 fio_sha3_update(sha3_ctx, p, hdr->len - hdr_size(vc->td, hdr));
454 fio_sha3_final(sha3_ctx);
456 if (!memcmp(sha, sha3_ctx->sha, sha_size))
461 vc->bad_crc = sha3_ctx->sha;
462 vc->crc_len = sha_size;
463 log_verify_failure(hdr, vc);
467 static int verify_io_u_sha3_224(struct verify_header *hdr, struct vcont *vc)
469 struct vhdr_sha3_224 *vh = hdr_priv(hdr);
470 uint8_t sha[SHA3_224_DIGEST_SIZE];
471 struct fio_sha3_ctx sha3_ctx = {
475 fio_sha3_224_init(&sha3_ctx);
477 return verify_io_u_sha3(hdr, vc, &sha3_ctx, vh->sha,
478 SHA3_224_DIGEST_SIZE, "sha3-224");
481 static int verify_io_u_sha3_256(struct verify_header *hdr, struct vcont *vc)
483 struct vhdr_sha3_256 *vh = hdr_priv(hdr);
484 uint8_t sha[SHA3_256_DIGEST_SIZE];
485 struct fio_sha3_ctx sha3_ctx = {
489 fio_sha3_256_init(&sha3_ctx);
491 return verify_io_u_sha3(hdr, vc, &sha3_ctx, vh->sha,
492 SHA3_256_DIGEST_SIZE, "sha3-256");
495 static int verify_io_u_sha3_384(struct verify_header *hdr, struct vcont *vc)
497 struct vhdr_sha3_384 *vh = hdr_priv(hdr);
498 uint8_t sha[SHA3_384_DIGEST_SIZE];
499 struct fio_sha3_ctx sha3_ctx = {
503 fio_sha3_384_init(&sha3_ctx);
505 return verify_io_u_sha3(hdr, vc, &sha3_ctx, vh->sha,
506 SHA3_384_DIGEST_SIZE, "sha3-384");
509 static int verify_io_u_sha3_512(struct verify_header *hdr, struct vcont *vc)
511 struct vhdr_sha3_512 *vh = hdr_priv(hdr);
512 uint8_t sha[SHA3_512_DIGEST_SIZE];
513 struct fio_sha3_ctx sha3_ctx = {
517 fio_sha3_512_init(&sha3_ctx);
519 return verify_io_u_sha3(hdr, vc, &sha3_ctx, vh->sha,
520 SHA3_512_DIGEST_SIZE, "sha3-512");
523 static int verify_io_u_sha512(struct verify_header *hdr, struct vcont *vc)
525 void *p = io_u_verify_off(hdr, vc);
526 struct vhdr_sha512 *vh = hdr_priv(hdr);
528 struct fio_sha512_ctx sha512_ctx = {
532 dprint(FD_VERIFY, "sha512 verify io_u %p, len %u\n", vc->io_u, hdr->len);
534 fio_sha512_init(&sha512_ctx);
535 fio_sha512_update(&sha512_ctx, p, hdr->len - hdr_size(vc->td, hdr));
537 if (!memcmp(vh->sha512, sha512_ctx.buf, sizeof(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);
548 static int verify_io_u_sha256(struct verify_header *hdr, struct vcont *vc)
550 void *p = io_u_verify_off(hdr, vc);
551 struct vhdr_sha256 *vh = hdr_priv(hdr);
553 struct fio_sha256_ctx sha256_ctx = {
557 dprint(FD_VERIFY, "sha256 verify io_u %p, len %u\n", vc->io_u, hdr->len);
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);
563 if (!memcmp(vh->sha256, sha256_ctx.buf, sizeof(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);
574 static int verify_io_u_sha1(struct verify_header *hdr, struct vcont *vc)
576 void *p = io_u_verify_off(hdr, vc);
577 struct vhdr_sha1 *vh = hdr_priv(hdr);
579 struct fio_sha1_ctx sha1_ctx = {
583 dprint(FD_VERIFY, "sha1 verify io_u %p, len %u\n", vc->io_u, hdr->len);
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);
589 if (!memcmp(vh->sha1, sha1_ctx.H, sizeof(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);
600 static int verify_io_u_crc7(struct verify_header *hdr, struct vcont *vc)
602 void *p = io_u_verify_off(hdr, vc);
603 struct vhdr_crc7 *vh = hdr_priv(hdr);
606 dprint(FD_VERIFY, "crc7 verify io_u %p, len %u\n", vc->io_u, hdr->len);
608 c = fio_crc7(p, hdr->len - hdr_size(vc->td, hdr));
614 vc->good_crc = &vh->crc7;
617 log_verify_failure(hdr, vc);
621 static int verify_io_u_crc16(struct verify_header *hdr, struct vcont *vc)
623 void *p = io_u_verify_off(hdr, vc);
624 struct vhdr_crc16 *vh = hdr_priv(hdr);
627 dprint(FD_VERIFY, "crc16 verify io_u %p, len %u\n", vc->io_u, hdr->len);
629 c = fio_crc16(p, hdr->len - hdr_size(vc->td, hdr));
635 vc->good_crc = &vh->crc16;
638 log_verify_failure(hdr, vc);
642 static int verify_io_u_crc64(struct verify_header *hdr, struct vcont *vc)
644 void *p = io_u_verify_off(hdr, vc);
645 struct vhdr_crc64 *vh = hdr_priv(hdr);
646 unsigned long long c;
648 dprint(FD_VERIFY, "crc64 verify io_u %p, len %u\n", vc->io_u, hdr->len);
650 c = fio_crc64(p, hdr->len - hdr_size(vc->td, hdr));
656 vc->good_crc = &vh->crc64;
659 log_verify_failure(hdr, vc);
663 static int verify_io_u_crc32(struct verify_header *hdr, struct vcont *vc)
665 void *p = io_u_verify_off(hdr, vc);
666 struct vhdr_crc32 *vh = hdr_priv(hdr);
669 dprint(FD_VERIFY, "crc32 verify io_u %p, len %u\n", vc->io_u, hdr->len);
671 c = fio_crc32(p, hdr->len - hdr_size(vc->td, hdr));
677 vc->good_crc = &vh->crc32;
680 log_verify_failure(hdr, vc);
684 static int verify_io_u_crc32c(struct verify_header *hdr, struct vcont *vc)
686 void *p = io_u_verify_off(hdr, vc);
687 struct vhdr_crc32 *vh = hdr_priv(hdr);
690 dprint(FD_VERIFY, "crc32c verify io_u %p, len %u\n", vc->io_u, hdr->len);
692 c = fio_crc32c(p, hdr->len - hdr_size(vc->td, hdr));
698 vc->good_crc = &vh->crc32;
701 log_verify_failure(hdr, vc);
705 static int verify_io_u_md5(struct verify_header *hdr, struct vcont *vc)
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 = {
714 dprint(FD_VERIFY, "md5 verify io_u %p, len %u\n", vc->io_u, hdr->len);
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);
720 if (!memcmp(vh->md5_digest, md5_ctx.hash, sizeof(hash)))
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);
732 * Push IO verification to a separate thread
734 int verify_io_u_async(struct thread_data *td, struct io_u **io_u_ptr)
736 struct io_u *io_u = *io_u_ptr;
738 pthread_mutex_lock(&td->io_u_lock);
741 put_file_log(td, io_u->file);
743 if (io_u->flags & IO_U_F_IN_CUR_DEPTH) {
745 io_u_clear(td, io_u, IO_U_F_IN_CUR_DEPTH);
747 flist_add_tail(&io_u->verify_list, &td->verify_list);
749 pthread_mutex_unlock(&td->io_u_lock);
751 pthread_cond_signal(&td->verify_cond);
756 * Thanks Rusty, for spending the time so I don't have to.
758 * http://rusty.ozlabs.org/?p=560
760 static int mem_is_zero(const void *data, size_t length)
762 const unsigned char *p = data;
765 /* Check first 16 bytes manually */
766 for (len = 0; len < 16; len++) {
775 /* Now we know that's zero, memcmp with self. */
776 return memcmp(data, p, length) == 0;
779 static int mem_is_zero_slow(const void *data, size_t length, size_t *offset)
781 const unsigned char *p = data;
795 static int verify_trimmed_io_u(struct thread_data *td, struct io_u *io_u)
799 if (!td->o.trim_zero)
802 if (mem_is_zero(io_u->buf, io_u->buflen))
805 mem_is_zero_slow(io_u->buf, io_u->buflen, &offset);
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);
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)
821 if (hdr->magic != FIO_HDR_MAGIC) {
822 log_err("verify: bad magic header %x, wanted %x",
823 hdr->magic, FIO_HDR_MAGIC);
826 if (hdr->len != hdr_len) {
827 log_err("verify: bad header length %u, wanted %u",
831 if (hdr->rand_seed != io_u->rand_seed) {
832 log_err("verify: bad header rand_seed %"PRIu64
834 hdr->rand_seed, io_u->rand_seed);
837 if (hdr->offset != io_u->offset + hdr_num * td->o.verify_interval) {
838 log_err("verify: bad header offset %"PRIu64
840 hdr->offset, io_u->offset);
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.
852 if (td_write(td) && (td_min_bs(td) == td_max_bs(td)) &&
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
858 hdr->numberio, io_u->numberio);
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",
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);
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);
882 int verify_io_u(struct thread_data *td, struct io_u **io_u_ptr)
884 struct verify_header *hdr;
885 struct io_u *io_u = *io_u_ptr;
886 unsigned int header_size, hdr_inc, hdr_num = 0;
890 if (td->o.verify == VERIFY_NULL || io_u->ddir != DDIR_READ)
893 * If the IO engine is faking IO (like null), then just pretend
894 * we verified everything.
896 if (td_ioengine_flagged(td, FIO_FAKEIO))
899 if (io_u->flags & IO_U_F_TRIMMED) {
900 ret = verify_trimmed_io_u(td, io_u);
904 hdr_inc = get_hdr_inc(td, io_u);
907 for (p = io_u->buf; p < io_u->buf + io_u->buflen;
908 p += hdr_inc, hdr_num++) {
914 unsigned int verify_type;
916 if (ret && td->o.verify_fatal)
919 header_size = __hdr_size(td->o.verify);
920 if (td->o.verify_offset)
921 memswp(p, p + td->o.verify_offset, header_size);
925 * Make rand_seed check pass when have verifysort or
928 if (td->o.verifysort || (td->flags & TD_F_VER_BACKLOG))
929 io_u->rand_seed = hdr->rand_seed;
931 if (td->o.verify != VERIFY_PATTERN_NO_HDR) {
932 ret = verify_header(io_u, td, hdr, hdr_num, hdr_inc);
937 if (td->o.verify != VERIFY_NONE)
938 verify_type = td->o.verify;
940 verify_type = hdr->verify_type;
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);
950 ret = verify_io_u_md5(hdr, &vc);
953 ret = verify_io_u_crc64(hdr, &vc);
956 case VERIFY_CRC32C_INTEL:
957 ret = verify_io_u_crc32c(hdr, &vc);
960 ret = verify_io_u_crc32(hdr, &vc);
963 ret = verify_io_u_crc16(hdr, &vc);
966 ret = verify_io_u_crc7(hdr, &vc);
969 ret = verify_io_u_sha256(hdr, &vc);
972 ret = verify_io_u_sha512(hdr, &vc);
974 case VERIFY_SHA3_224:
975 ret = verify_io_u_sha3_224(hdr, &vc);
977 case VERIFY_SHA3_256:
978 ret = verify_io_u_sha3_256(hdr, &vc);
980 case VERIFY_SHA3_384:
981 ret = verify_io_u_sha3_384(hdr, &vc);
983 case VERIFY_SHA3_512:
984 ret = verify_io_u_sha3_512(hdr, &vc);
987 ret = verify_io_u_xxhash(hdr, &vc);
990 ret = verify_io_u_sha1(hdr, &vc);
993 case VERIFY_PATTERN_NO_HDR:
994 ret = verify_io_u_pattern(hdr, &vc);
997 log_err("Bad verify type %u\n", hdr->verify_type);
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);
1007 if (ret && td->o.verify_fatal)
1008 fio_mark_td_terminate(td);
1013 static void fill_xxhash(struct verify_header *hdr, void *p, unsigned int len)
1015 struct vhdr_xxhash *vh = hdr_priv(hdr);
1018 state = XXH32_init(1);
1019 XXH32_update(state, p, len);
1020 vh->hash = XXH32_digest(state);
1023 static void fill_sha3(struct fio_sha3_ctx *sha3_ctx, void *p, unsigned int len)
1025 fio_sha3_update(sha3_ctx, p, len);
1026 fio_sha3_final(sha3_ctx);
1029 static void fill_sha3_224(struct verify_header *hdr, void *p, unsigned int len)
1031 struct vhdr_sha3_224 *vh = hdr_priv(hdr);
1032 struct fio_sha3_ctx sha3_ctx = {
1036 fio_sha3_224_init(&sha3_ctx);
1037 fill_sha3(&sha3_ctx, p, len);
1040 static void fill_sha3_256(struct verify_header *hdr, void *p, unsigned int len)
1042 struct vhdr_sha3_256 *vh = hdr_priv(hdr);
1043 struct fio_sha3_ctx sha3_ctx = {
1047 fio_sha3_256_init(&sha3_ctx);
1048 fill_sha3(&sha3_ctx, p, len);
1051 static void fill_sha3_384(struct verify_header *hdr, void *p, unsigned int len)
1053 struct vhdr_sha3_384 *vh = hdr_priv(hdr);
1054 struct fio_sha3_ctx sha3_ctx = {
1058 fio_sha3_384_init(&sha3_ctx);
1059 fill_sha3(&sha3_ctx, p, len);
1062 static void fill_sha3_512(struct verify_header *hdr, void *p, unsigned int len)
1064 struct vhdr_sha3_512 *vh = hdr_priv(hdr);
1065 struct fio_sha3_ctx sha3_ctx = {
1069 fio_sha3_512_init(&sha3_ctx);
1070 fill_sha3(&sha3_ctx, p, len);
1073 static void fill_sha512(struct verify_header *hdr, void *p, unsigned int len)
1075 struct vhdr_sha512 *vh = hdr_priv(hdr);
1076 struct fio_sha512_ctx sha512_ctx = {
1080 fio_sha512_init(&sha512_ctx);
1081 fio_sha512_update(&sha512_ctx, p, len);
1084 static void fill_sha256(struct verify_header *hdr, void *p, unsigned int len)
1086 struct vhdr_sha256 *vh = hdr_priv(hdr);
1087 struct fio_sha256_ctx sha256_ctx = {
1091 fio_sha256_init(&sha256_ctx);
1092 fio_sha256_update(&sha256_ctx, p, len);
1093 fio_sha256_final(&sha256_ctx);
1096 static void fill_sha1(struct verify_header *hdr, void *p, unsigned int len)
1098 struct vhdr_sha1 *vh = hdr_priv(hdr);
1099 struct fio_sha1_ctx sha1_ctx = {
1103 fio_sha1_init(&sha1_ctx);
1104 fio_sha1_update(&sha1_ctx, p, len);
1105 fio_sha1_final(&sha1_ctx);
1108 static void fill_crc7(struct verify_header *hdr, void *p, unsigned int len)
1110 struct vhdr_crc7 *vh = hdr_priv(hdr);
1112 vh->crc7 = fio_crc7(p, len);
1115 static void fill_crc16(struct verify_header *hdr, void *p, unsigned int len)
1117 struct vhdr_crc16 *vh = hdr_priv(hdr);
1119 vh->crc16 = fio_crc16(p, len);
1122 static void fill_crc32(struct verify_header *hdr, void *p, unsigned int len)
1124 struct vhdr_crc32 *vh = hdr_priv(hdr);
1126 vh->crc32 = fio_crc32(p, len);
1129 static void fill_crc32c(struct verify_header *hdr, void *p, unsigned int len)
1131 struct vhdr_crc32 *vh = hdr_priv(hdr);
1133 vh->crc32 = fio_crc32c(p, len);
1136 static void fill_crc64(struct verify_header *hdr, void *p, unsigned int len)
1138 struct vhdr_crc64 *vh = hdr_priv(hdr);
1140 vh->crc64 = fio_crc64(p, len);
1143 static void fill_md5(struct verify_header *hdr, void *p, unsigned int len)
1145 struct vhdr_md5 *vh = hdr_priv(hdr);
1146 struct fio_md5_ctx md5_ctx = {
1147 .hash = (uint32_t *) vh->md5_digest,
1150 fio_md5_init(&md5_ctx);
1151 fio_md5_update(&md5_ctx, p, len);
1152 fio_md5_final(&md5_ctx);
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)
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));
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)
1179 if (td->o.verify != VERIFY_PATTERN_NO_HDR)
1180 __fill_hdr(td, io_u, hdr, header_num, header_len, rand_seed);
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)
1187 unsigned int data_len;
1193 fill_hdr(td, io_u, hdr, header_num, header_len, io_u->rand_seed);
1195 data_len = header_len - hdr_size(td, hdr);
1197 data = p + hdr_size(td, hdr);
1198 switch (td->o.verify) {
1200 dprint(FD_VERIFY, "fill md5 io_u %p, len %u\n",
1202 fill_md5(hdr, data, data_len);
1205 dprint(FD_VERIFY, "fill crc64 io_u %p, len %u\n",
1207 fill_crc64(hdr, data, data_len);
1210 case VERIFY_CRC32C_INTEL:
1211 dprint(FD_VERIFY, "fill crc32c io_u %p, len %u\n",
1213 fill_crc32c(hdr, data, data_len);
1216 dprint(FD_VERIFY, "fill crc32 io_u %p, len %u\n",
1218 fill_crc32(hdr, data, data_len);
1221 dprint(FD_VERIFY, "fill crc16 io_u %p, len %u\n",
1223 fill_crc16(hdr, data, data_len);
1226 dprint(FD_VERIFY, "fill crc7 io_u %p, len %u\n",
1228 fill_crc7(hdr, data, data_len);
1231 dprint(FD_VERIFY, "fill sha256 io_u %p, len %u\n",
1233 fill_sha256(hdr, data, data_len);
1236 dprint(FD_VERIFY, "fill sha512 io_u %p, len %u\n",
1238 fill_sha512(hdr, data, data_len);
1240 case VERIFY_SHA3_224:
1241 dprint(FD_VERIFY, "fill sha3-224 io_u %p, len %u\n",
1243 fill_sha3_224(hdr, data, data_len);
1245 case VERIFY_SHA3_256:
1246 dprint(FD_VERIFY, "fill sha3-256 io_u %p, len %u\n",
1248 fill_sha3_256(hdr, data, data_len);
1250 case VERIFY_SHA3_384:
1251 dprint(FD_VERIFY, "fill sha3-384 io_u %p, len %u\n",
1253 fill_sha3_384(hdr, data, data_len);
1255 case VERIFY_SHA3_512:
1256 dprint(FD_VERIFY, "fill sha3-512 io_u %p, len %u\n",
1258 fill_sha3_512(hdr, data, data_len);
1261 dprint(FD_VERIFY, "fill xxhash io_u %p, len %u\n",
1263 fill_xxhash(hdr, data, data_len);
1266 dprint(FD_VERIFY, "fill sha1 io_u %p, len %u\n",
1268 fill_sha1(hdr, data, data_len);
1270 case VERIFY_HDR_ONLY:
1271 case VERIFY_PATTERN:
1272 case VERIFY_PATTERN_NO_HDR:
1273 /* nothing to do here */
1276 log_err("fio: bad verify type: %d\n", td->o.verify);
1280 if (td->o.verify_offset && hdr_size(td, hdr))
1281 memswp(p, p + td->o.verify_offset, hdr_size(td, hdr));
1285 * fill body of io_u->buf with random data and add a header with the
1286 * checksum of choice
1288 void populate_verify_io_u(struct thread_data *td, struct io_u *io_u)
1290 if (td->o.verify == VERIFY_NULL)
1293 io_u->numberio = td->io_issues[io_u->ddir];
1295 fill_pattern_headers(td, io_u, 0, 0);
1298 int get_next_verify(struct thread_data *td, struct io_u *io_u)
1300 struct io_piece *ipo = NULL;
1303 * this io_u is from a requeue, we already filled the offsets
1308 if (!RB_EMPTY_ROOT(&td->io_hist_tree)) {
1309 struct rb_node *n = rb_first(&td->io_hist_tree);
1311 ipo = rb_entry(n, struct io_piece, rb_node);
1314 * Ensure that the associated IO has completed
1317 if (ipo->flags & IP_F_IN_FLIGHT)
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);
1327 * Ensure that the associated IO has completed
1330 if (ipo->flags & IP_F_IN_FLIGHT)
1333 flist_del(&ipo->list);
1334 assert(ipo->flags & IP_F_ONLIST);
1335 ipo->flags &= ~IP_F_ONLIST;
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);
1347 if (ipo->flags & IP_F_TRIMMED)
1348 io_u_set(td, io_u, IO_U_F_TRIMMED);
1350 if (!fio_file_open(io_u->file)) {
1351 int r = td_io_open_file(td, io_u->file);
1354 dprint(FD_VERIFY, "failed file %s open\n",
1355 io_u->file->file_name);
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;
1366 remove_trim_entry(td, ipo);
1368 dprint(FD_VERIFY, "get_next_verify: ret io_u %p\n", io_u);
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);
1379 dprint(FD_VERIFY, "get_next_verify: empty\n");
1383 void fio_verify_init(struct thread_data *td)
1385 if (td->o.verify == VERIFY_CRC32C_INTEL ||
1386 td->o.verify == VERIFY_CRC32C) {
1387 crc32c_arm64_probe();
1388 crc32c_intel_probe();
1392 static void *verify_async_thread(void *data)
1394 struct thread_data *td = data;
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");
1408 if (td->verify_thread_exit)
1411 pthread_mutex_lock(&td->io_u_lock);
1413 while (flist_empty(&td->verify_list) &&
1414 !td->verify_thread_exit) {
1415 ret = pthread_cond_wait(&td->verify_cond,
1418 pthread_mutex_unlock(&td->io_u_lock);
1423 flist_splice_init(&td->verify_list, &list);
1424 pthread_mutex_unlock(&td->io_u_lock);
1426 if (flist_empty(&list))
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);
1433 io_u_set(td, io_u, IO_U_F_NO_FILE_PUT);
1434 ret = verify_io_u(td, &io_u);
1439 if (td_non_fatal_error(td, ERROR_TYPE_VERIFY_BIT, ret)) {
1440 update_error_count(td, ret);
1448 td_verror(td, ret, "async_verify");
1449 if (td->o.verify_fatal)
1450 fio_mark_td_terminate(td);
1454 pthread_mutex_lock(&td->io_u_lock);
1455 td->nr_verify_threads--;
1456 pthread_mutex_unlock(&td->io_u_lock);
1458 pthread_cond_signal(&td->free_cond);
1462 int verify_async_init(struct thread_data *td)
1465 pthread_attr_t attr;
1467 pthread_attr_init(&attr);
1468 pthread_attr_setstacksize(&attr, 2 * PTHREAD_STACK_MIN);
1470 td->verify_thread_exit = 0;
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);
1477 log_err("fio: async verify creation failed: %s\n",
1481 ret = pthread_detach(td->verify_threads[i]);
1483 log_err("fio: async verify thread detach failed: %s\n",
1487 td->nr_verify_threads++;
1490 pthread_attr_destroy(&attr);
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;
1496 pthread_cond_broadcast(&td->verify_cond);
1503 void verify_async_exit(struct thread_data *td)
1505 td->verify_thread_exit = 1;
1507 pthread_cond_broadcast(&td->verify_cond);
1509 pthread_mutex_lock(&td->io_u_lock);
1511 while (td->nr_verify_threads)
1512 pthread_cond_wait(&td->free_cond, &td->io_u_lock);
1514 pthread_mutex_unlock(&td->io_u_lock);
1515 free(td->verify_threads);
1516 td->verify_threads = NULL;
1519 int paste_blockoff(char *buf, unsigned int len, void *priv)
1521 struct io_u *io = priv;
1522 unsigned long long off;
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);
1531 static int __fill_file_completions(struct thread_data *td,
1532 struct thread_io_list *s,
1533 struct fio_file *f, unsigned int *index)
1538 if (!f->last_write_comp)
1541 if (td->io_blocks[DDIR_WRITE] < td->o.iodepth)
1542 comps = td->io_blocks[DDIR_WRITE];
1544 comps = td->o.iodepth;
1546 j = f->last_write_idx - 1;
1547 for (i = 0; i < comps; i++) {
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]);
1559 static int fill_file_completions(struct thread_data *td,
1560 struct thread_io_list *s, unsigned int *index)
1566 for_each_file(td, f, i)
1567 comps += __fill_file_completions(td, s, f, index);
1572 struct all_io_list *get_all_io_list(int save_mask, size_t *sz)
1574 struct all_io_list *rep;
1575 struct thread_data *td;
1580 compiletime_assert(sizeof(struct all_io_list) == 8, "all_io_list");
1583 * Calculate reply space needed. We need one 'io_state' per thread,
1584 * and the size will vary depending on depth.
1588 for_each_td(td, i) {
1589 if (save_mask != IO_LIST_ALL && (i + 1) != save_mask)
1592 td->flags |= TD_F_VSTATE_SAVED;
1593 depth += (td->o.iodepth * td->o.nr_files);
1601 *sz += nr * sizeof(struct thread_io_list);
1602 *sz += depth * sizeof(struct file_comp);
1604 memset(rep, 0, *sz);
1606 rep->threads = cpu_to_le64((uint64_t) nr);
1608 next = &rep->state[0];
1609 for_each_td(td, i) {
1610 struct thread_io_list *s = next;
1611 unsigned int comps, index = 0;
1613 if (save_mask != IO_LIST_ALL && (i + 1) != save_mask)
1616 comps = fill_file_completions(td, s, &index);
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);
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;
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);
1646 static int open_state_file(const char *name, const char *prefix, int num,
1654 flags = O_CREAT | O_TRUNC | O_WRONLY | O_SYNC;
1658 verify_state_gen_name(out, sizeof(out), name, prefix, num);
1660 fd = open(out, flags, 0644);
1662 perror("fio: open state file");
1663 log_err("fio: state file: %s (for_write=%d)\n", out, for_write);
1670 static int write_thread_list_state(struct thread_io_list *s,
1673 struct verify_state_hdr hdr;
1678 fd = open_state_file((const char *) s->name, prefix, s->index, 1);
1682 crc = fio_crc32c((void *)s, thread_io_list_sz(s));
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))
1691 ret = write(fd, s, thread_io_list_sz(s));
1692 if (ret != thread_io_list_sz(s)) {
1695 perror("fio: write state file");
1696 log_err("fio: failed to write state file\n");
1705 void __verify_save_state(struct all_io_list *state, const char *prefix)
1707 struct thread_io_list *s = &state->state[0];
1710 for (i = 0; i < le64_to_cpu(state->threads); i++) {
1711 write_thread_list_state(s, prefix);
1712 s = io_list_next(s);
1716 void verify_save_state(int mask)
1718 struct all_io_list *state;
1721 state = get_all_io_list(mask, &sz);
1723 char prefix[PATH_MAX];
1726 sprintf(prefix, "%s%clocal", aux_path, FIO_OS_PATH_SEPARATOR);
1728 strcpy(prefix, "local");
1730 __verify_save_state(state, prefix);
1735 void verify_free_state(struct thread_data *td)
1741 void verify_assign_state(struct thread_data *td, void *p)
1743 struct thread_io_list *s = p;
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);
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]);
1756 for (i = 0; i < 4; i++)
1757 s->rand.state32.s[i] = le32_to_cpu(s->rand.state32.s[i]);
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);
1768 int verify_state_hdr(struct verify_state_hdr *hdr, struct thread_io_list *s)
1772 hdr->version = le64_to_cpu(hdr->version);
1773 hdr->size = le64_to_cpu(hdr->size);
1774 hdr->crc = le64_to_cpu(hdr->crc);
1776 if (hdr->version != VSTATE_HDR_VERSION)
1779 crc = fio_crc32c((void *)s, hdr->size);
1780 if (crc != hdr->crc)
1786 int verify_load_state(struct thread_data *td, const char *prefix)
1788 struct verify_state_hdr hdr;
1794 if (!td->o.verify_state)
1797 fd = open_state_file(td->o.name, prefix, td->thread_number - 1, 0);
1801 ret = read(fd, &hdr, sizeof(hdr));
1802 if (ret != sizeof(hdr)) {
1804 td_verror(td, errno, "read verify state hdr");
1805 log_err("fio: failed reading verify state header\n");
1809 hdr.version = le64_to_cpu(hdr.version);
1810 hdr.size = le64_to_cpu(hdr.size);
1811 hdr.crc = le64_to_cpu(hdr.crc);
1813 if (hdr.version != VSTATE_HDR_VERSION) {
1814 log_err("fio: unsupported (%d) version in verify state header\n",
1815 (unsigned int) hdr.version);
1819 s = malloc(hdr.size);
1820 ret = read(fd, s, hdr.size);
1821 if (ret != hdr.size) {
1823 td_verror(td, errno, "read verify state");
1824 log_err("fio: failed reading verity state\n");
1828 crc = fio_crc32c(s, hdr.size);
1829 if (crc != hdr.crc) {
1830 log_err("fio: verify state is corrupt\n");
1836 verify_assign_state(td, s);
1846 * Use the loaded verify state to know when to stop doing verification
1848 int verify_state_should_stop(struct thread_data *td, struct io_u *io_u)
1850 struct thread_io_list *s = td->vstate;
1851 struct fio_file *f = io_u->file;
1858 * If we're not into the window of issues - depth yet, continue. If
1859 * issue is shorter than depth, do check.
1861 if ((td->io_blocks[DDIR_READ] < s->depth ||
1862 s->numberio - td->io_blocks[DDIR_READ] > s->depth) &&
1863 s->numberio > s->depth)
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
1871 for (i = 0; i < s->no_comps; i++) {
1872 if (s->comps[i].fileno != f->fileno)
1874 if (io_u->offset == s->comps[i].offset)
1879 * Not found, we have to stop