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" | |
e29d1b70 JA |
9 | |
10 | static void fill_random_bytes(struct thread_data *td, | |
11 | unsigned char *p, unsigned int len) | |
12 | { | |
13 | unsigned int todo; | |
14 | double r; | |
15 | ||
16 | while (len) { | |
17 | r = os_random_double(&td->verify_state); | |
18 | ||
19 | /* | |
20 | * lrand48_r seems to be broken and only fill the bottom | |
21 | * 32-bits, even on 64-bit archs with 64-bit longs | |
22 | */ | |
23 | todo = sizeof(r); | |
24 | if (todo > len) | |
25 | todo = len; | |
26 | ||
27 | memcpy(p, &r, todo); | |
28 | ||
29 | len -= todo; | |
30 | p += todo; | |
31 | } | |
32 | } | |
33 | ||
34 | static void hexdump(void *buffer, int len) | |
35 | { | |
36 | unsigned char *p = buffer; | |
37 | int i; | |
38 | ||
39 | for (i = 0; i < len; i++) | |
6d86144d JA |
40 | log_info("%02x", p[i]); |
41 | log_info("\n"); | |
e29d1b70 JA |
42 | } |
43 | ||
44 | static int verify_io_u_crc32(struct verify_header *hdr, struct io_u *io_u) | |
45 | { | |
46 | unsigned char *p = (unsigned char *) io_u->buf; | |
47 | unsigned long c; | |
48 | ||
49 | p += sizeof(*hdr); | |
50 | c = crc32(p, hdr->len - sizeof(*hdr)); | |
51 | ||
52 | if (c != hdr->crc32) { | |
a4f4fdd7 | 53 | log_err("crc32: verify failed at %llu/%lu\n", io_u->offset, io_u->buflen); |
e29d1b70 JA |
54 | log_err("crc32: wanted %lx, got %lx\n", hdr->crc32, c); |
55 | return 1; | |
56 | } | |
57 | ||
58 | return 0; | |
59 | } | |
60 | ||
61 | static int verify_io_u_md5(struct verify_header *hdr, struct io_u *io_u) | |
62 | { | |
63 | unsigned char *p = (unsigned char *) io_u->buf; | |
64 | struct md5_ctx md5_ctx; | |
65 | ||
66 | memset(&md5_ctx, 0, sizeof(md5_ctx)); | |
67 | p += sizeof(*hdr); | |
68 | md5_update(&md5_ctx, p, hdr->len - sizeof(*hdr)); | |
69 | ||
70 | if (memcmp(hdr->md5_digest, md5_ctx.hash, sizeof(md5_ctx.hash))) { | |
a4f4fdd7 | 71 | log_err("md5: verify failed at %llu/%lu\n", io_u->offset, io_u->buflen); |
e29d1b70 JA |
72 | hexdump(hdr->md5_digest, sizeof(hdr->md5_digest)); |
73 | hexdump(md5_ctx.hash, sizeof(md5_ctx.hash)); | |
74 | return 1; | |
75 | } | |
76 | ||
77 | return 0; | |
78 | } | |
79 | ||
36690c9b | 80 | int verify_io_u(struct thread_data *td, struct io_u *io_u) |
e29d1b70 JA |
81 | { |
82 | struct verify_header *hdr = (struct verify_header *) io_u->buf; | |
83 | int ret; | |
84 | ||
36690c9b JA |
85 | if (td->o.verify == VERIFY_NULL) |
86 | return 0; | |
87 | ||
36167d82 JA |
88 | if (hdr->fio_magic != FIO_HDR_MAGIC) { |
89 | log_err("Bad verify header %x\n", hdr->fio_magic); | |
a7dfe862 | 90 | return EIO; |
36167d82 | 91 | } |
e29d1b70 JA |
92 | |
93 | if (hdr->verify_type == VERIFY_MD5) | |
94 | ret = verify_io_u_md5(hdr, io_u); | |
95 | else if (hdr->verify_type == VERIFY_CRC32) | |
96 | ret = verify_io_u_crc32(hdr, io_u); | |
97 | else { | |
1e97cce9 | 98 | log_err("Bad verify type %u\n", hdr->verify_type); |
e29d1b70 JA |
99 | ret = 1; |
100 | } | |
101 | ||
a7dfe862 JA |
102 | if (ret) |
103 | return EIO; | |
104 | ||
105 | return 0; | |
e29d1b70 JA |
106 | } |
107 | ||
108 | static void fill_crc32(struct verify_header *hdr, void *p, unsigned int len) | |
109 | { | |
110 | hdr->crc32 = crc32(p, len); | |
111 | } | |
112 | ||
113 | static void fill_md5(struct verify_header *hdr, void *p, unsigned int len) | |
114 | { | |
115 | struct md5_ctx md5_ctx; | |
116 | ||
117 | memset(&md5_ctx, 0, sizeof(md5_ctx)); | |
118 | md5_update(&md5_ctx, p, len); | |
119 | memcpy(hdr->md5_digest, md5_ctx.hash, sizeof(md5_ctx.hash)); | |
120 | } | |
121 | ||
122 | /* | |
123 | * fill body of io_u->buf with random data and add a header with the | |
124 | * crc32 or md5 sum of that data. | |
125 | */ | |
126 | void populate_verify_io_u(struct thread_data *td, struct io_u *io_u) | |
127 | { | |
128 | unsigned char *p = (unsigned char *) io_u->buf; | |
129 | struct verify_header hdr; | |
130 | ||
9cc3d150 JA |
131 | if (td->o.verify == VERIFY_NULL) |
132 | return; | |
133 | ||
e29d1b70 JA |
134 | hdr.fio_magic = FIO_HDR_MAGIC; |
135 | hdr.len = io_u->buflen; | |
136 | p += sizeof(hdr); | |
137 | fill_random_bytes(td, p, io_u->buflen - sizeof(hdr)); | |
138 | ||
2dc1bbeb | 139 | if (td->o.verify == VERIFY_MD5) { |
e29d1b70 JA |
140 | fill_md5(&hdr, p, io_u->buflen - sizeof(hdr)); |
141 | hdr.verify_type = VERIFY_MD5; | |
36690c9b | 142 | } else if (td->o.verify == VERIFY_CRC32) { |
e29d1b70 JA |
143 | fill_crc32(&hdr, p, io_u->buflen - sizeof(hdr)); |
144 | hdr.verify_type = VERIFY_CRC32; | |
145 | } | |
146 | ||
147 | memcpy(io_u->buf, &hdr, sizeof(hdr)); | |
148 | } | |
149 | ||
150 | int get_next_verify(struct thread_data *td, struct io_u *io_u) | |
151 | { | |
8de8f047 | 152 | struct io_piece *ipo = NULL; |
e29d1b70 | 153 | |
d2d7fa53 JA |
154 | /* |
155 | * this io_u is from a requeue, we already filled the offsets | |
156 | */ | |
157 | if (io_u->file) | |
158 | return 0; | |
159 | ||
8de8f047 JA |
160 | if (!RB_EMPTY_ROOT(&td->io_hist_tree)) { |
161 | struct rb_node *n = rb_first(&td->io_hist_tree); | |
e29d1b70 | 162 | |
8de8f047 | 163 | ipo = rb_entry(n, struct io_piece, rb_node); |
4b87898e | 164 | rb_erase(n, &td->io_hist_tree); |
8de8f047 JA |
165 | } else if (!list_empty(&td->io_hist_list)) { |
166 | ipo = list_entry(td->io_hist_list.next, struct io_piece, list); | |
167 | list_del(&ipo->list); | |
168 | } | |
e29d1b70 | 169 | |
8de8f047 | 170 | if (ipo) { |
e29d1b70 JA |
171 | io_u->offset = ipo->offset; |
172 | io_u->buflen = ipo->len; | |
36167d82 | 173 | io_u->file = ipo->file; |
e29d1b70 | 174 | io_u->ddir = DDIR_READ; |
36167d82 JA |
175 | io_u->xfer_buf = io_u->buf; |
176 | io_u->xfer_buflen = io_u->buflen; | |
e29d1b70 JA |
177 | free(ipo); |
178 | return 0; | |
179 | } | |
180 | ||
181 | return 1; | |
182 | } |