2 * IO verification helpers
11 static void fill_random_bytes(struct thread_data *td,
12 unsigned char *p, unsigned int len)
18 r = os_random_long(&td->verify_state);
21 * lrand48_r seems to be broken and only fill the bottom
22 * 32-bits, even on 64-bit archs with 64-bit longs
35 static void hexdump(void *buffer, int len)
37 unsigned char *p = buffer;
40 for (i = 0; i < len; i++)
41 log_info("%02x", p[i]);
45 static int verify_io_u_crc7(struct verify_header *hdr, struct io_u *io_u)
47 unsigned char *p = io_u->buf;
51 c = crc7(p, hdr->len - sizeof(*hdr));
54 log_err("crc7: verify failed at %llu/%lu\n", io_u->offset, io_u->buflen);
55 log_err("crc7: wanted %x, got %x\n", hdr->crc7, c);
62 static int verify_io_u_crc16(struct verify_header *hdr, struct io_u *io_u)
64 unsigned char *p = io_u->buf;
68 c = crc16(p, hdr->len - sizeof(*hdr));
70 if (c != hdr->crc16) {
71 log_err("crc16: verify failed at %llu/%lu\n", io_u->offset, io_u->buflen);
72 log_err("crc16: wanted %x, got %x\n", hdr->crc16, c);
79 static int verify_io_u_crc32(struct verify_header *hdr, struct io_u *io_u)
81 unsigned char *p = io_u->buf;
85 c = crc32(p, hdr->len - sizeof(*hdr));
87 if (c != hdr->crc32) {
88 log_err("crc32: verify failed at %llu/%lu\n", io_u->offset, io_u->buflen);
89 log_err("crc32: wanted %lx, got %lx\n", hdr->crc32, c);
96 static int verify_io_u_md5(struct verify_header *hdr, struct io_u *io_u)
98 unsigned char *p = io_u->buf + sizeof(*hdr);
99 uint32_t hash[MD5_HASH_WORDS];
100 struct md5_ctx md5_ctx = {
104 md5_update(&md5_ctx, p, hdr->len - sizeof(*hdr));
106 if (memcmp(hdr->md5_digest, md5_ctx.hash, sizeof(hash))) {
107 log_err("md5: verify failed at %llu/%lu\n", io_u->offset, io_u->buflen);
108 hexdump(hdr->md5_digest, sizeof(hdr->md5_digest));
109 hexdump(md5_ctx.hash, sizeof(hash));
116 int verify_io_u(struct thread_data *td, struct io_u *io_u)
118 struct verify_header *hdr = (struct verify_header *) io_u->buf;
121 if (td->o.verify == VERIFY_NULL || io_u->ddir != DDIR_READ)
124 if (hdr->fio_magic != FIO_HDR_MAGIC) {
125 log_err("Bad verify header %x\n", hdr->fio_magic);
129 switch (hdr->verify_type) {
131 ret = verify_io_u_md5(hdr, io_u);
134 ret = verify_io_u_crc32(hdr, io_u);
137 ret = verify_io_u_crc16(hdr, io_u);
140 ret = verify_io_u_crc7(hdr, io_u);
143 log_err("Bad verify type %u\n", hdr->verify_type);
153 static void fill_crc7(struct verify_header *hdr, void *p, unsigned int len)
155 hdr->crc7 = crc7(p, len);
158 static void fill_crc16(struct verify_header *hdr, void *p, unsigned int len)
160 hdr->crc16 = crc16(p, len);
163 static void fill_crc32(struct verify_header *hdr, void *p, unsigned int len)
165 hdr->crc32 = crc32(p, len);
168 static void fill_md5(struct verify_header *hdr, void *p, unsigned int len)
170 struct md5_ctx md5_ctx = {
171 .hash = (uint32_t *) hdr->md5_digest,
174 md5_update(&md5_ctx, p, len);
178 * fill body of io_u->buf with random data and add a header with the
179 * crc32 or md5 sum of that data.
181 void populate_verify_io_u(struct thread_data *td, struct io_u *io_u)
183 const unsigned int len = io_u->buflen - sizeof(struct verify_header);
184 struct verify_header *hdr;
187 if (td->o.verify == VERIFY_NULL)
190 hdr = (struct verify_header *) io_u->buf;
191 hdr->fio_magic = FIO_HDR_MAGIC;
192 hdr->len = io_u->buflen;
193 hdr->verify_type = td->o.verify;
195 p = io_u->buf + sizeof(*hdr);
196 fill_random_bytes(td, p, len);
198 switch (td->o.verify) {
200 fill_md5(hdr, p, len);
203 fill_crc32(hdr, p, len);
206 fill_crc16(hdr, p, len);
209 fill_crc7(hdr, p, len);
212 log_err("fio: bad verify type: %d\n", td->o.verify);
217 int get_next_verify(struct thread_data *td, struct io_u *io_u)
219 struct io_piece *ipo = NULL;
222 * this io_u is from a requeue, we already filled the offsets
227 if (!RB_EMPTY_ROOT(&td->io_hist_tree)) {
228 struct rb_node *n = rb_first(&td->io_hist_tree);
230 ipo = rb_entry(n, struct io_piece, rb_node);
231 rb_erase(n, &td->io_hist_tree);
232 } else if (!list_empty(&td->io_hist_list)) {
233 ipo = list_entry(td->io_hist_list.next, struct io_piece, list);
234 list_del(&ipo->list);
238 io_u->offset = ipo->offset;
239 io_u->buflen = ipo->len;
240 io_u->file = ipo->file;
242 if ((io_u->file->flags & FIO_FILE_OPEN) == 0) {
243 int r = td_io_open_file(td, io_u->file);
250 assert(io_u->file->flags & FIO_FILE_OPEN);
251 io_u->ddir = DDIR_READ;
252 io_u->xfer_buf = io_u->buf;
253 io_u->xfer_buflen = io_u->buflen;