2 * IO verification helpers
11 static void fill_random_bytes(struct thread_data *td,
12 void *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 void memswp(void* buf1, void* buf2, unsigned int len)
37 struct verify_header swap;
38 memcpy(&swap, buf1, len);
39 memcpy(buf1, buf2, len);
40 memcpy(buf2, &swap, len);
43 static void hexdump(void *buffer, int len)
45 unsigned char *p = buffer;
48 for (i = 0; i < len; i++)
49 log_info("%02x", p[i]);
53 static int verify_io_u_crc7(struct verify_header *hdr, struct io_u *io_u,
54 unsigned char header_num)
56 void *p = io_u->buf + header_num * hdr->len + sizeof(*hdr);
59 c = crc7(p, hdr->len - sizeof(*hdr));
62 log_err("crc7: verify failed at %llu/%u\n",
63 io_u->offset + header_num * hdr->len,
65 log_err("crc7: wanted %x, got %x\n", hdr->crc7, c);
72 static int verify_io_u_crc16(struct verify_header *hdr, struct io_u *io_u,
73 unsigned int header_num)
75 void *p = io_u->buf + header_num * hdr->len + sizeof(*hdr);
78 c = crc16(p, hdr->len - sizeof(*hdr));
80 if (c != hdr->crc16) {
81 log_err("crc16: verify failed at %llu/%u\n",
82 io_u->offset + header_num * hdr->len,
84 log_err("crc16: wanted %x, got %x\n", hdr->crc16, c);
91 static int verify_io_u_crc64(struct verify_header *hdr, struct io_u *io_u,
92 unsigned int header_num)
94 void *p = io_u->buf + header_num * hdr->len + sizeof(*hdr);
97 c = crc64(p, hdr->len - sizeof(*hdr));
99 if (c != hdr->crc64) {
100 log_err("crc64: verify failed at %llu/%u\n",
101 io_u->offset + header_num * hdr->len,
103 log_err("crc64: wanted %llx, got %llx\n", hdr->crc64, c);
110 static int verify_io_u_crc32(struct verify_header *hdr, struct io_u *io_u,
111 unsigned int header_num)
113 void *p = io_u->buf + header_num * hdr->len + sizeof(*hdr);
116 c = crc32(p, hdr->len - sizeof(*hdr));
118 if (c != hdr->crc32) {
119 log_err("crc32: verify failed at %llu/%u\n",
120 io_u->offset + header_num * hdr->len,
122 log_err("crc32: wanted %lx, got %lx\n", hdr->crc32, c);
129 static int verify_io_u_md5(struct verify_header *hdr, struct io_u *io_u,
130 unsigned int header_num)
132 void *p = io_u->buf + header_num * hdr->len + sizeof(*hdr);
133 uint32_t hash[MD5_HASH_WORDS];
134 struct md5_ctx md5_ctx = {
138 md5_update(&md5_ctx, p, hdr->len - sizeof(*hdr));
140 if (memcmp(hdr->md5_digest, md5_ctx.hash, sizeof(md5_ctx.hash))) {
141 log_err("md5: verify failed at %llu/%u\n",
142 io_u->offset + header_num * hdr->len,
144 hexdump(hdr->md5_digest, sizeof(hdr->md5_digest));
145 hexdump(md5_ctx.hash, sizeof(hash));
152 int verify_io_u(struct thread_data *td, struct io_u *io_u)
154 struct verify_header *hdr;
155 unsigned int hdr_inc, hdr_num = 0;
159 if (td->o.verify == VERIFY_NULL || io_u->ddir != DDIR_READ)
162 hdr_inc = io_u->buflen;
163 if (td->o.header_interval)
164 hdr_inc = td->o.header_interval;
166 for (p = io_u->buf; p < io_u->buf + io_u->buflen; p += hdr_inc) {
167 if (td->o.header_offset)
168 memswp(p, p + td->o.header_offset, sizeof(*hdr));
172 if (hdr->fio_magic != FIO_HDR_MAGIC) {
173 log_err("Bad verify header %x\n", hdr->fio_magic);
177 switch (hdr->verify_type) {
179 ret = verify_io_u_md5(hdr, io_u, hdr_num);
182 ret = verify_io_u_crc64(hdr, io_u, hdr_num);
185 ret = verify_io_u_crc32(hdr, io_u, hdr_num);
188 ret = verify_io_u_crc16(hdr, io_u, hdr_num);
191 ret = verify_io_u_crc7(hdr, io_u, hdr_num);
194 log_err("Bad verify type %u\n", hdr->verify_type);
203 static void fill_crc7(struct verify_header *hdr, void *p, unsigned int len)
205 hdr->crc7 = crc7(p, len);
208 static void fill_crc16(struct verify_header *hdr, void *p, unsigned int len)
210 hdr->crc16 = crc16(p, len);
213 static void fill_crc32(struct verify_header *hdr, void *p, unsigned int len)
215 hdr->crc32 = crc32(p, len);
218 static void fill_crc64(struct verify_header *hdr, void *p, unsigned int len)
220 hdr->crc64 = crc64(p, len);
223 static void fill_md5(struct verify_header *hdr, void *p, unsigned int len)
225 struct md5_ctx md5_ctx = {
226 .hash = (uint32_t *) hdr->md5_digest,
229 md5_update(&md5_ctx, p, len);
233 * fill body of io_u->buf with random data and add a header with the
234 * crc32 or md5 sum of that data.
236 void populate_verify_io_u(struct thread_data *td, struct io_u *io_u)
238 struct verify_header *hdr;
239 void *p = io_u->buf, *data;
240 unsigned int hdr_inc, data_len;
242 if (td->o.verify == VERIFY_NULL)
245 fill_random_bytes(td, p, io_u->buflen);
247 hdr_inc = io_u->buflen;
248 if (td->o.header_interval)
249 hdr_inc = td->o.header_interval;
250 data_len = hdr_inc - sizeof(*hdr);
252 for (;p < io_u->buf + io_u->buflen; p += hdr_inc) {
255 hdr->fio_magic = FIO_HDR_MAGIC;
256 hdr->verify_type = td->o.verify;
259 data = p + sizeof(*hdr);
260 switch (td->o.verify) {
262 fill_md5(hdr, data, data_len);
265 fill_crc64(hdr, data, data_len);
268 fill_crc32(hdr, data, data_len);
271 fill_crc16(hdr, data, data_len);
274 fill_crc7(hdr, data, data_len);
277 log_err("fio: bad verify type: %d\n", td->o.verify);
280 if (td->o.header_offset)
281 memswp(p, p + td->o.header_offset, sizeof(*hdr));
285 int get_next_verify(struct thread_data *td, struct io_u *io_u)
287 struct io_piece *ipo = NULL;
290 * this io_u is from a requeue, we already filled the offsets
295 if (!RB_EMPTY_ROOT(&td->io_hist_tree)) {
296 struct rb_node *n = rb_first(&td->io_hist_tree);
298 ipo = rb_entry(n, struct io_piece, rb_node);
299 rb_erase(n, &td->io_hist_tree);
300 } else if (!list_empty(&td->io_hist_list)) {
301 ipo = list_entry(td->io_hist_list.next, struct io_piece, list);
302 list_del(&ipo->list);
306 io_u->offset = ipo->offset;
307 io_u->buflen = ipo->len;
308 io_u->file = ipo->file;
310 if ((io_u->file->flags & FIO_FILE_OPEN) == 0) {
311 int r = td_io_open_file(td, io_u->file);
318 assert(io_u->file->flags & FIO_FILE_OPEN);
319 io_u->ddir = DDIR_READ;
320 io_u->xfer_buf = io_u->buf;
321 io_u->xfer_buflen = io_u->buflen;