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]);
54 * Return data area 'header_num'
56 static inline void *io_u_verify_off(struct verify_header *hdr,
58 unsigned char header_num)
60 return io_u->buf + sizeof(*hdr) + header_num * hdr->len;
63 static int verify_io_u_crc7(struct verify_header *hdr, struct io_u *io_u,
64 unsigned char header_num)
66 void *p = io_u_verify_off(hdr, io_u, header_num);
69 c = crc7(p, hdr->len - sizeof(*hdr));
72 log_err("crc7: verify failed at %llu/%u\n",
73 io_u->offset + header_num * hdr->len,
75 log_err("crc7: wanted %x, got %x\n", hdr->crc7, c);
82 static int verify_io_u_crc16(struct verify_header *hdr, struct io_u *io_u,
83 unsigned int header_num)
85 void *p = io_u_verify_off(hdr, io_u, header_num);
88 c = crc16(p, hdr->len - sizeof(*hdr));
90 if (c != hdr->crc16) {
91 log_err("crc16: verify failed at %llu/%u\n",
92 io_u->offset + header_num * hdr->len,
94 log_err("crc16: wanted %x, got %x\n", hdr->crc16, c);
101 static int verify_io_u_crc64(struct verify_header *hdr, struct io_u *io_u,
102 unsigned int header_num)
104 void *p = io_u_verify_off(hdr, io_u, header_num);
105 unsigned long long c;
107 c = crc64(p, hdr->len - sizeof(*hdr));
109 if (c != hdr->crc64) {
110 log_err("crc64: verify failed at %llu/%u\n",
111 io_u->offset + header_num * hdr->len,
113 log_err("crc64: wanted %llx, got %llx\n", hdr->crc64, c);
120 static int verify_io_u_crc32(struct verify_header *hdr, struct io_u *io_u,
121 unsigned int header_num)
123 void *p = io_u_verify_off(hdr, io_u, header_num);
126 c = crc32(p, hdr->len - sizeof(*hdr));
128 if (c != hdr->crc32) {
129 log_err("crc32: verify failed at %llu/%u\n",
130 io_u->offset + header_num * hdr->len,
132 log_err("crc32: wanted %lx, got %lx\n", hdr->crc32, c);
139 static int verify_io_u_md5(struct verify_header *hdr, struct io_u *io_u,
140 unsigned int header_num)
142 void *p = io_u_verify_off(hdr, io_u, header_num);
143 uint32_t hash[MD5_HASH_WORDS];
144 struct md5_ctx md5_ctx = {
148 md5_update(&md5_ctx, p, hdr->len - sizeof(*hdr));
150 if (memcmp(hdr->md5_digest, md5_ctx.hash, sizeof(md5_ctx.hash))) {
151 log_err("md5: verify failed at %llu/%u\n",
152 io_u->offset + header_num * hdr->len,
154 hexdump(hdr->md5_digest, sizeof(hdr->md5_digest));
155 hexdump(md5_ctx.hash, sizeof(hash));
162 int verify_io_u(struct thread_data *td, struct io_u *io_u)
164 struct verify_header *hdr;
165 unsigned int hdr_inc, hdr_num = 0;
169 if (td->o.verify == VERIFY_NULL || io_u->ddir != DDIR_READ)
172 hdr_inc = io_u->buflen;
173 if (td->o.header_interval)
174 hdr_inc = td->o.header_interval;
176 for (p = io_u->buf; p < io_u->buf + io_u->buflen; p += hdr_inc) {
177 if (td->o.header_offset)
178 memswp(p, p + td->o.header_offset, sizeof(*hdr));
182 if (hdr->fio_magic != FIO_HDR_MAGIC) {
183 log_err("Bad verify header %x\n", hdr->fio_magic);
187 switch (hdr->verify_type) {
189 ret = verify_io_u_md5(hdr, io_u, hdr_num);
192 ret = verify_io_u_crc64(hdr, io_u, hdr_num);
195 ret = verify_io_u_crc32(hdr, io_u, hdr_num);
198 ret = verify_io_u_crc16(hdr, io_u, hdr_num);
201 ret = verify_io_u_crc7(hdr, io_u, hdr_num);
204 log_err("Bad verify type %u\n", hdr->verify_type);
213 static void fill_crc7(struct verify_header *hdr, void *p, unsigned int len)
215 hdr->crc7 = crc7(p, len);
218 static void fill_crc16(struct verify_header *hdr, void *p, unsigned int len)
220 hdr->crc16 = crc16(p, len);
223 static void fill_crc32(struct verify_header *hdr, void *p, unsigned int len)
225 hdr->crc32 = crc32(p, len);
228 static void fill_crc64(struct verify_header *hdr, void *p, unsigned int len)
230 hdr->crc64 = crc64(p, len);
233 static void fill_md5(struct verify_header *hdr, void *p, unsigned int len)
235 struct md5_ctx md5_ctx = {
236 .hash = (uint32_t *) hdr->md5_digest,
239 md5_update(&md5_ctx, p, len);
243 * fill body of io_u->buf with random data and add a header with the
244 * crc32 or md5 sum of that data.
246 void populate_verify_io_u(struct thread_data *td, struct io_u *io_u)
248 struct verify_header *hdr;
249 void *p = io_u->buf, *data;
250 unsigned int hdr_inc, data_len;
252 if (td->o.verify == VERIFY_NULL)
255 fill_random_bytes(td, p, io_u->buflen);
257 hdr_inc = io_u->buflen;
258 if (td->o.header_interval)
259 hdr_inc = td->o.header_interval;
260 data_len = hdr_inc - sizeof(*hdr);
262 for (;p < io_u->buf + io_u->buflen; p += hdr_inc) {
265 hdr->fio_magic = FIO_HDR_MAGIC;
266 hdr->verify_type = td->o.verify;
269 data = p + sizeof(*hdr);
270 switch (td->o.verify) {
272 fill_md5(hdr, data, data_len);
275 fill_crc64(hdr, data, data_len);
278 fill_crc32(hdr, data, data_len);
281 fill_crc16(hdr, data, data_len);
284 fill_crc7(hdr, data, data_len);
287 log_err("fio: bad verify type: %d\n", td->o.verify);
290 if (td->o.header_offset)
291 memswp(p, p + td->o.header_offset, sizeof(*hdr));
295 int get_next_verify(struct thread_data *td, struct io_u *io_u)
297 struct io_piece *ipo = NULL;
300 * this io_u is from a requeue, we already filled the offsets
305 if (!RB_EMPTY_ROOT(&td->io_hist_tree)) {
306 struct rb_node *n = rb_first(&td->io_hist_tree);
308 ipo = rb_entry(n, struct io_piece, rb_node);
309 rb_erase(n, &td->io_hist_tree);
310 } else if (!list_empty(&td->io_hist_list)) {
311 ipo = list_entry(td->io_hist_list.next, struct io_piece, list);
312 list_del(&ipo->list);
316 io_u->offset = ipo->offset;
317 io_u->buflen = ipo->len;
318 io_u->file = ipo->file;
320 if ((io_u->file->flags & FIO_FILE_OPEN) == 0) {
321 int r = td_io_open_file(td, io_u->file);
328 assert(io_u->file->flags & FIO_FILE_OPEN);
329 io_u->ddir = DDIR_READ;
330 io_u->xfer_buf = io_u->buf;
331 io_u->xfer_buflen = io_u->buflen;