Commit | Line | Data |
---|---|---|
e29d1b70 JA |
1 | /* |
2 | * IO verification helpers | |
3 | */ | |
4 | #include <unistd.h> | |
5 | #include <fcntl.h> | |
6 | #include <string.h> | |
97af62ce | 7 | #include <assert.h> |
e29d1b70 JA |
8 | |
9 | #include "fio.h" | |
e29d1b70 JA |
10 | |
11 | static void fill_random_bytes(struct thread_data *td, | |
12 | unsigned char *p, unsigned int len) | |
13 | { | |
14 | unsigned int todo; | |
4c5946c6 | 15 | int r; |
e29d1b70 JA |
16 | |
17 | while (len) { | |
4c5946c6 | 18 | r = os_random_long(&td->verify_state); |
e29d1b70 JA |
19 | |
20 | /* | |
21 | * lrand48_r seems to be broken and only fill the bottom | |
22 | * 32-bits, even on 64-bit archs with 64-bit longs | |
23 | */ | |
24 | todo = sizeof(r); | |
25 | if (todo > len) | |
26 | todo = len; | |
27 | ||
28 | memcpy(p, &r, todo); | |
29 | ||
30 | len -= todo; | |
31 | p += todo; | |
32 | } | |
33 | } | |
34 | ||
35 | static void hexdump(void *buffer, int len) | |
36 | { | |
37 | unsigned char *p = buffer; | |
38 | int i; | |
39 | ||
40 | for (i = 0; i < len; i++) | |
6d86144d JA |
41 | log_info("%02x", p[i]); |
42 | log_info("\n"); | |
e29d1b70 JA |
43 | } |
44 | ||
1e154bdb JA |
45 | static int verify_io_u_crc7(struct verify_header *hdr, struct io_u *io_u) |
46 | { | |
47 | unsigned char *p = io_u->buf; | |
48 | unsigned char c; | |
49 | ||
50 | p += sizeof(*hdr); | |
51 | c = crc7(p, hdr->len - sizeof(*hdr)); | |
52 | ||
53 | if (c != hdr->crc7) { | |
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); | |
56 | return 1; | |
57 | } | |
58 | ||
59 | return 0; | |
60 | } | |
61 | ||
969f7ed3 JA |
62 | static int verify_io_u_crc16(struct verify_header *hdr, struct io_u *io_u) |
63 | { | |
64 | unsigned char *p = io_u->buf; | |
65 | unsigned short c; | |
66 | ||
67 | p += sizeof(*hdr); | |
68 | c = crc16(p, hdr->len - sizeof(*hdr)); | |
69 | ||
70 | if (c != hdr->crc16) { | |
71 | log_err("crc16: verify failed at %llu/%lu\n", io_u->offset, io_u->buflen); | |
1f24ea44 | 72 | log_err("crc16: wanted %x, got %x\n", hdr->crc16, c); |
969f7ed3 JA |
73 | return 1; |
74 | } | |
75 | ||
76 | return 0; | |
77 | } | |
78 | ||
e29d1b70 JA |
79 | static int verify_io_u_crc32(struct verify_header *hdr, struct io_u *io_u) |
80 | { | |
969f7ed3 | 81 | unsigned char *p = io_u->buf; |
e29d1b70 JA |
82 | unsigned long c; |
83 | ||
84 | p += sizeof(*hdr); | |
85 | c = crc32(p, hdr->len - sizeof(*hdr)); | |
86 | ||
87 | if (c != hdr->crc32) { | |
a4f4fdd7 | 88 | log_err("crc32: verify failed at %llu/%lu\n", io_u->offset, io_u->buflen); |
e29d1b70 JA |
89 | log_err("crc32: wanted %lx, got %lx\n", hdr->crc32, c); |
90 | return 1; | |
91 | } | |
92 | ||
93 | return 0; | |
94 | } | |
95 | ||
96 | static int verify_io_u_md5(struct verify_header *hdr, struct io_u *io_u) | |
97 | { | |
8c432325 JA |
98 | unsigned char *p = io_u->buf + sizeof(*hdr); |
99 | uint32_t hash[MD5_HASH_WORDS]; | |
100 | struct md5_ctx md5_ctx = { | |
101 | .hash = hash, | |
102 | }; | |
e29d1b70 | 103 | |
e29d1b70 JA |
104 | md5_update(&md5_ctx, p, hdr->len - sizeof(*hdr)); |
105 | ||
8c432325 | 106 | if (memcmp(hdr->md5_digest, md5_ctx.hash, sizeof(hash))) { |
a4f4fdd7 | 107 | log_err("md5: verify failed at %llu/%lu\n", io_u->offset, io_u->buflen); |
e29d1b70 | 108 | hexdump(hdr->md5_digest, sizeof(hdr->md5_digest)); |
8c432325 | 109 | hexdump(md5_ctx.hash, sizeof(hash)); |
e29d1b70 JA |
110 | return 1; |
111 | } | |
112 | ||
113 | return 0; | |
114 | } | |
115 | ||
36690c9b | 116 | int verify_io_u(struct thread_data *td, struct io_u *io_u) |
e29d1b70 JA |
117 | { |
118 | struct verify_header *hdr = (struct verify_header *) io_u->buf; | |
119 | int ret; | |
120 | ||
1dcc0498 | 121 | if (td->o.verify == VERIFY_NULL || io_u->ddir != DDIR_READ) |
36690c9b JA |
122 | return 0; |
123 | ||
36167d82 JA |
124 | if (hdr->fio_magic != FIO_HDR_MAGIC) { |
125 | log_err("Bad verify header %x\n", hdr->fio_magic); | |
a7dfe862 | 126 | return EIO; |
36167d82 | 127 | } |
e29d1b70 | 128 | |
a3ff21e3 JA |
129 | switch (hdr->verify_type) { |
130 | case VERIFY_MD5: | |
e29d1b70 | 131 | ret = verify_io_u_md5(hdr, io_u); |
a3ff21e3 JA |
132 | break; |
133 | case VERIFY_CRC32: | |
e29d1b70 | 134 | ret = verify_io_u_crc32(hdr, io_u); |
a3ff21e3 JA |
135 | break; |
136 | case VERIFY_CRC16: | |
969f7ed3 | 137 | ret = verify_io_u_crc16(hdr, io_u); |
a3ff21e3 JA |
138 | break; |
139 | case VERIFY_CRC7: | |
1e154bdb | 140 | ret = verify_io_u_crc7(hdr, io_u); |
a3ff21e3 JA |
141 | break; |
142 | default: | |
1e97cce9 | 143 | log_err("Bad verify type %u\n", hdr->verify_type); |
e29d1b70 JA |
144 | ret = 1; |
145 | } | |
146 | ||
a7dfe862 JA |
147 | if (ret) |
148 | return EIO; | |
149 | ||
150 | return 0; | |
e29d1b70 JA |
151 | } |
152 | ||
1e154bdb JA |
153 | static void fill_crc7(struct verify_header *hdr, void *p, unsigned int len) |
154 | { | |
155 | hdr->crc7 = crc7(p, len); | |
156 | } | |
157 | ||
969f7ed3 JA |
158 | static void fill_crc16(struct verify_header *hdr, void *p, unsigned int len) |
159 | { | |
160 | hdr->crc16 = crc16(p, len); | |
161 | } | |
162 | ||
e29d1b70 JA |
163 | static void fill_crc32(struct verify_header *hdr, void *p, unsigned int len) |
164 | { | |
165 | hdr->crc32 = crc32(p, len); | |
166 | } | |
167 | ||
168 | static void fill_md5(struct verify_header *hdr, void *p, unsigned int len) | |
169 | { | |
8c432325 JA |
170 | struct md5_ctx md5_ctx = { |
171 | .hash = (uint32_t *) hdr->md5_digest, | |
172 | }; | |
e29d1b70 | 173 | |
e29d1b70 | 174 | md5_update(&md5_ctx, p, len); |
e29d1b70 JA |
175 | } |
176 | ||
177 | /* | |
178 | * fill body of io_u->buf with random data and add a header with the | |
179 | * crc32 or md5 sum of that data. | |
180 | */ | |
181 | void populate_verify_io_u(struct thread_data *td, struct io_u *io_u) | |
182 | { | |
baefa9be JA |
183 | const unsigned int len = io_u->buflen - sizeof(struct verify_header); |
184 | struct verify_header *hdr; | |
185 | unsigned char *p; | |
e29d1b70 | 186 | |
9cc3d150 JA |
187 | if (td->o.verify == VERIFY_NULL) |
188 | return; | |
189 | ||
baefa9be JA |
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; | |
194 | ||
195 | p = io_u->buf + sizeof(*hdr); | |
196 | fill_random_bytes(td, p, len); | |
197 | ||
198 | switch (td->o.verify) { | |
199 | case VERIFY_MD5: | |
200 | fill_md5(hdr, p, len); | |
201 | break; | |
202 | case VERIFY_CRC32: | |
203 | fill_crc32(hdr, p, len); | |
204 | break; | |
205 | case VERIFY_CRC16: | |
206 | fill_crc16(hdr, p, len); | |
207 | break; | |
208 | case VERIFY_CRC7: | |
209 | fill_crc7(hdr, p, len); | |
210 | break; | |
211 | default: | |
212 | log_err("fio: bad verify type: %d\n", td->o.verify); | |
213 | assert(0); | |
e29d1b70 | 214 | } |
e29d1b70 JA |
215 | } |
216 | ||
217 | int get_next_verify(struct thread_data *td, struct io_u *io_u) | |
218 | { | |
8de8f047 | 219 | struct io_piece *ipo = NULL; |
e29d1b70 | 220 | |
d2d7fa53 JA |
221 | /* |
222 | * this io_u is from a requeue, we already filled the offsets | |
223 | */ | |
224 | if (io_u->file) | |
225 | return 0; | |
226 | ||
8de8f047 JA |
227 | if (!RB_EMPTY_ROOT(&td->io_hist_tree)) { |
228 | struct rb_node *n = rb_first(&td->io_hist_tree); | |
e29d1b70 | 229 | |
8de8f047 | 230 | ipo = rb_entry(n, struct io_piece, rb_node); |
4b87898e | 231 | rb_erase(n, &td->io_hist_tree); |
8de8f047 JA |
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); | |
235 | } | |
e29d1b70 | 236 | |
8de8f047 | 237 | if (ipo) { |
e29d1b70 JA |
238 | io_u->offset = ipo->offset; |
239 | io_u->buflen = ipo->len; | |
36167d82 | 240 | io_u->file = ipo->file; |
97af62ce JA |
241 | |
242 | if ((io_u->file->flags & FIO_FILE_OPEN) == 0) { | |
243 | int r = td_io_open_file(td, io_u->file); | |
244 | ||
245 | if (r) | |
246 | return 1; | |
247 | } | |
248 | ||
249 | get_file(ipo->file); | |
250 | assert(io_u->file->flags & FIO_FILE_OPEN); | |
e29d1b70 | 251 | io_u->ddir = DDIR_READ; |
36167d82 JA |
252 | io_u->xfer_buf = io_u->buf; |
253 | io_u->xfer_buflen = io_u->buflen; | |
e29d1b70 JA |
254 | free(ipo); |
255 | return 0; | |
256 | } | |
257 | ||
258 | return 1; | |
259 | } |