Commit | Line | Data |
---|---|---|
e29d1b70 JA |
1 | /* |
2 | * IO verification helpers | |
3 | */ | |
4 | #include <unistd.h> | |
5 | #include <fcntl.h> | |
6 | #include <string.h> | |
7 | ||
8 | #include "fio.h" | |
9 | #include "os.h" | |
10 | ||
11 | static void fill_random_bytes(struct thread_data *td, | |
12 | unsigned char *p, unsigned int len) | |
13 | { | |
14 | unsigned int todo; | |
15 | double r; | |
16 | ||
17 | while (len) { | |
18 | r = os_random_double(&td->verify_state); | |
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++) | |
41 | fprintf(f_out, "%02x", p[i]); | |
42 | fprintf(f_out, "\n"); | |
43 | } | |
44 | ||
45 | static int verify_io_u_crc32(struct verify_header *hdr, struct io_u *io_u) | |
46 | { | |
47 | unsigned char *p = (unsigned char *) io_u->buf; | |
48 | unsigned long c; | |
49 | ||
50 | p += sizeof(*hdr); | |
51 | c = crc32(p, hdr->len - sizeof(*hdr)); | |
52 | ||
53 | if (c != hdr->crc32) { | |
54 | log_err("crc32: verify failed at %llu/%u\n", io_u->offset, io_u->buflen); | |
55 | log_err("crc32: wanted %lx, got %lx\n", hdr->crc32, c); | |
56 | return 1; | |
57 | } | |
58 | ||
59 | return 0; | |
60 | } | |
61 | ||
62 | static int verify_io_u_md5(struct verify_header *hdr, struct io_u *io_u) | |
63 | { | |
64 | unsigned char *p = (unsigned char *) io_u->buf; | |
65 | struct md5_ctx md5_ctx; | |
66 | ||
67 | memset(&md5_ctx, 0, sizeof(md5_ctx)); | |
68 | p += sizeof(*hdr); | |
69 | md5_update(&md5_ctx, p, hdr->len - sizeof(*hdr)); | |
70 | ||
71 | if (memcmp(hdr->md5_digest, md5_ctx.hash, sizeof(md5_ctx.hash))) { | |
72 | log_err("md5: verify failed at %llu/%u\n", io_u->offset, io_u->buflen); | |
73 | hexdump(hdr->md5_digest, sizeof(hdr->md5_digest)); | |
74 | hexdump(md5_ctx.hash, sizeof(md5_ctx.hash)); | |
75 | return 1; | |
76 | } | |
77 | ||
78 | return 0; | |
79 | } | |
80 | ||
a9619d44 | 81 | static int verify_io_u(struct io_u *io_u) |
e29d1b70 JA |
82 | { |
83 | struct verify_header *hdr = (struct verify_header *) io_u->buf; | |
84 | int ret; | |
85 | ||
86 | if (hdr->fio_magic != FIO_HDR_MAGIC) | |
87 | return 1; | |
88 | ||
89 | if (hdr->verify_type == VERIFY_MD5) | |
90 | ret = verify_io_u_md5(hdr, io_u); | |
91 | else if (hdr->verify_type == VERIFY_CRC32) | |
92 | ret = verify_io_u_crc32(hdr, io_u); | |
93 | else { | |
94 | log_err("Bad verify type %d\n", hdr->verify_type); | |
95 | ret = 1; | |
96 | } | |
97 | ||
98 | return ret; | |
99 | } | |
100 | ||
101 | static void fill_crc32(struct verify_header *hdr, void *p, unsigned int len) | |
102 | { | |
103 | hdr->crc32 = crc32(p, len); | |
104 | } | |
105 | ||
106 | static void fill_md5(struct verify_header *hdr, void *p, unsigned int len) | |
107 | { | |
108 | struct md5_ctx md5_ctx; | |
109 | ||
110 | memset(&md5_ctx, 0, sizeof(md5_ctx)); | |
111 | md5_update(&md5_ctx, p, len); | |
112 | memcpy(hdr->md5_digest, md5_ctx.hash, sizeof(md5_ctx.hash)); | |
113 | } | |
114 | ||
115 | /* | |
116 | * fill body of io_u->buf with random data and add a header with the | |
117 | * crc32 or md5 sum of that data. | |
118 | */ | |
119 | void populate_verify_io_u(struct thread_data *td, struct io_u *io_u) | |
120 | { | |
121 | unsigned char *p = (unsigned char *) io_u->buf; | |
122 | struct verify_header hdr; | |
123 | ||
124 | hdr.fio_magic = FIO_HDR_MAGIC; | |
125 | hdr.len = io_u->buflen; | |
126 | p += sizeof(hdr); | |
127 | fill_random_bytes(td, p, io_u->buflen - sizeof(hdr)); | |
128 | ||
129 | if (td->verify == VERIFY_MD5) { | |
130 | fill_md5(&hdr, p, io_u->buflen - sizeof(hdr)); | |
131 | hdr.verify_type = VERIFY_MD5; | |
132 | } else { | |
133 | fill_crc32(&hdr, p, io_u->buflen - sizeof(hdr)); | |
134 | hdr.verify_type = VERIFY_CRC32; | |
135 | } | |
136 | ||
137 | memcpy(io_u->buf, &hdr, sizeof(hdr)); | |
138 | } | |
139 | ||
140 | int get_next_verify(struct thread_data *td, struct io_u *io_u) | |
141 | { | |
142 | struct io_piece *ipo; | |
143 | ||
144 | if (!list_empty(&td->io_hist_list)) { | |
145 | ipo = list_entry(td->io_hist_list.next, struct io_piece, list); | |
146 | ||
147 | list_del(&ipo->list); | |
148 | ||
149 | io_u->offset = ipo->offset; | |
150 | io_u->buflen = ipo->len; | |
151 | io_u->ddir = DDIR_READ; | |
152 | free(ipo); | |
153 | return 0; | |
154 | } | |
155 | ||
156 | return 1; | |
157 | } | |
a9619d44 JA |
158 | |
159 | int do_io_u_verify(struct thread_data *td, struct io_u **io_u) | |
160 | { | |
161 | struct io_u *v_io_u = *io_u; | |
162 | int ret = 0; | |
163 | ||
164 | if (v_io_u) { | |
165 | ret = verify_io_u(v_io_u); | |
166 | put_io_u(td, v_io_u); | |
167 | *io_u = NULL; | |
168 | } | |
169 | ||
170 | return ret; | |
171 | } |