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 | ||
969f7ed3 JA |
45 | static int verify_io_u_crc16(struct verify_header *hdr, struct io_u *io_u) |
46 | { | |
47 | unsigned char *p = io_u->buf; | |
48 | unsigned short c; | |
49 | ||
50 | p += sizeof(*hdr); | |
51 | c = crc16(p, hdr->len - sizeof(*hdr)); | |
52 | ||
53 | if (c != hdr->crc16) { | |
54 | log_err("crc16: verify failed at %llu/%lu\n", io_u->offset, io_u->buflen); | |
55 | log_err("crc16: wanted %lx, got %x\n", hdr->crc32, c); | |
56 | return 1; | |
57 | } | |
58 | ||
59 | return 0; | |
60 | } | |
61 | ||
e29d1b70 JA |
62 | static int verify_io_u_crc32(struct verify_header *hdr, struct io_u *io_u) |
63 | { | |
969f7ed3 | 64 | unsigned char *p = io_u->buf; |
e29d1b70 JA |
65 | unsigned long c; |
66 | ||
67 | p += sizeof(*hdr); | |
68 | c = crc32(p, hdr->len - sizeof(*hdr)); | |
69 | ||
70 | if (c != hdr->crc32) { | |
a4f4fdd7 | 71 | log_err("crc32: verify failed at %llu/%lu\n", io_u->offset, io_u->buflen); |
e29d1b70 JA |
72 | log_err("crc32: wanted %lx, got %lx\n", hdr->crc32, c); |
73 | return 1; | |
74 | } | |
75 | ||
76 | return 0; | |
77 | } | |
78 | ||
79 | static int verify_io_u_md5(struct verify_header *hdr, struct io_u *io_u) | |
80 | { | |
969f7ed3 | 81 | unsigned char *p = io_u->buf; |
e29d1b70 JA |
82 | struct md5_ctx md5_ctx; |
83 | ||
84 | memset(&md5_ctx, 0, sizeof(md5_ctx)); | |
85 | p += sizeof(*hdr); | |
86 | md5_update(&md5_ctx, p, hdr->len - sizeof(*hdr)); | |
87 | ||
88 | if (memcmp(hdr->md5_digest, md5_ctx.hash, sizeof(md5_ctx.hash))) { | |
a4f4fdd7 | 89 | log_err("md5: verify failed at %llu/%lu\n", io_u->offset, io_u->buflen); |
e29d1b70 JA |
90 | hexdump(hdr->md5_digest, sizeof(hdr->md5_digest)); |
91 | hexdump(md5_ctx.hash, sizeof(md5_ctx.hash)); | |
92 | return 1; | |
93 | } | |
94 | ||
95 | return 0; | |
96 | } | |
97 | ||
36690c9b | 98 | int verify_io_u(struct thread_data *td, struct io_u *io_u) |
e29d1b70 JA |
99 | { |
100 | struct verify_header *hdr = (struct verify_header *) io_u->buf; | |
101 | int ret; | |
102 | ||
1dcc0498 | 103 | if (td->o.verify == VERIFY_NULL || io_u->ddir != DDIR_READ) |
36690c9b JA |
104 | return 0; |
105 | ||
36167d82 JA |
106 | if (hdr->fio_magic != FIO_HDR_MAGIC) { |
107 | log_err("Bad verify header %x\n", hdr->fio_magic); | |
a7dfe862 | 108 | return EIO; |
36167d82 | 109 | } |
e29d1b70 JA |
110 | |
111 | if (hdr->verify_type == VERIFY_MD5) | |
112 | ret = verify_io_u_md5(hdr, io_u); | |
113 | else if (hdr->verify_type == VERIFY_CRC32) | |
114 | ret = verify_io_u_crc32(hdr, io_u); | |
969f7ed3 JA |
115 | else if (hdr->verify_type == VERIFY_CRC16) |
116 | ret = verify_io_u_crc16(hdr, io_u); | |
e29d1b70 | 117 | else { |
1e97cce9 | 118 | log_err("Bad verify type %u\n", hdr->verify_type); |
e29d1b70 JA |
119 | ret = 1; |
120 | } | |
121 | ||
a7dfe862 JA |
122 | if (ret) |
123 | return EIO; | |
124 | ||
125 | return 0; | |
e29d1b70 JA |
126 | } |
127 | ||
969f7ed3 JA |
128 | static void fill_crc16(struct verify_header *hdr, void *p, unsigned int len) |
129 | { | |
130 | hdr->crc16 = crc16(p, len); | |
131 | } | |
132 | ||
e29d1b70 JA |
133 | static void fill_crc32(struct verify_header *hdr, void *p, unsigned int len) |
134 | { | |
135 | hdr->crc32 = crc32(p, len); | |
136 | } | |
137 | ||
138 | static void fill_md5(struct verify_header *hdr, void *p, unsigned int len) | |
139 | { | |
140 | struct md5_ctx md5_ctx; | |
141 | ||
142 | memset(&md5_ctx, 0, sizeof(md5_ctx)); | |
143 | md5_update(&md5_ctx, p, len); | |
144 | memcpy(hdr->md5_digest, md5_ctx.hash, sizeof(md5_ctx.hash)); | |
145 | } | |
146 | ||
147 | /* | |
148 | * fill body of io_u->buf with random data and add a header with the | |
149 | * crc32 or md5 sum of that data. | |
150 | */ | |
151 | void populate_verify_io_u(struct thread_data *td, struct io_u *io_u) | |
152 | { | |
153 | unsigned char *p = (unsigned char *) io_u->buf; | |
154 | struct verify_header hdr; | |
155 | ||
9cc3d150 JA |
156 | if (td->o.verify == VERIFY_NULL) |
157 | return; | |
158 | ||
e29d1b70 JA |
159 | hdr.fio_magic = FIO_HDR_MAGIC; |
160 | hdr.len = io_u->buflen; | |
161 | p += sizeof(hdr); | |
162 | fill_random_bytes(td, p, io_u->buflen - sizeof(hdr)); | |
163 | ||
2dc1bbeb | 164 | if (td->o.verify == VERIFY_MD5) { |
e29d1b70 JA |
165 | fill_md5(&hdr, p, io_u->buflen - sizeof(hdr)); |
166 | hdr.verify_type = VERIFY_MD5; | |
36690c9b | 167 | } else if (td->o.verify == VERIFY_CRC32) { |
e29d1b70 JA |
168 | fill_crc32(&hdr, p, io_u->buflen - sizeof(hdr)); |
169 | hdr.verify_type = VERIFY_CRC32; | |
969f7ed3 JA |
170 | } else if (td->o.verify == VERIFY_CRC16) { |
171 | fill_crc16(&hdr, p, io_u->buflen - sizeof(hdr)); | |
172 | hdr.verify_type = VERIFY_CRC16; | |
e29d1b70 JA |
173 | } |
174 | ||
175 | memcpy(io_u->buf, &hdr, sizeof(hdr)); | |
176 | } | |
177 | ||
178 | int get_next_verify(struct thread_data *td, struct io_u *io_u) | |
179 | { | |
8de8f047 | 180 | struct io_piece *ipo = NULL; |
e29d1b70 | 181 | |
d2d7fa53 JA |
182 | /* |
183 | * this io_u is from a requeue, we already filled the offsets | |
184 | */ | |
185 | if (io_u->file) | |
186 | return 0; | |
187 | ||
8de8f047 JA |
188 | if (!RB_EMPTY_ROOT(&td->io_hist_tree)) { |
189 | struct rb_node *n = rb_first(&td->io_hist_tree); | |
e29d1b70 | 190 | |
8de8f047 | 191 | ipo = rb_entry(n, struct io_piece, rb_node); |
4b87898e | 192 | rb_erase(n, &td->io_hist_tree); |
8de8f047 JA |
193 | } else if (!list_empty(&td->io_hist_list)) { |
194 | ipo = list_entry(td->io_hist_list.next, struct io_piece, list); | |
195 | list_del(&ipo->list); | |
196 | } | |
e29d1b70 | 197 | |
8de8f047 | 198 | if (ipo) { |
e29d1b70 JA |
199 | io_u->offset = ipo->offset; |
200 | io_u->buflen = ipo->len; | |
36167d82 | 201 | io_u->file = ipo->file; |
97af62ce JA |
202 | |
203 | if ((io_u->file->flags & FIO_FILE_OPEN) == 0) { | |
204 | int r = td_io_open_file(td, io_u->file); | |
205 | ||
206 | if (r) | |
207 | return 1; | |
208 | } | |
209 | ||
210 | get_file(ipo->file); | |
211 | assert(io_u->file->flags & FIO_FILE_OPEN); | |
e29d1b70 | 212 | io_u->ddir = DDIR_READ; |
36167d82 JA |
213 | io_u->xfer_buf = io_u->buf; |
214 | io_u->xfer_buflen = io_u->buflen; | |
e29d1b70 JA |
215 | free(ipo); |
216 | return 0; | |
217 | } | |
218 | ||
219 | return 1; | |
220 | } |