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Commit | Line | Data |
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31b8006e SW |
1 | #ifndef __CEPH_DECODE_H |
2 | #define __CEPH_DECODE_H | |
3 | ||
4 | #include <asm/unaligned.h> | |
c7e337d6 | 5 | #include <linux/time.h> |
31b8006e | 6 | |
c89136ea SW |
7 | #include "types.h" |
8 | ||
31b8006e SW |
9 | /* |
10 | * in all cases, | |
11 | * void **p pointer to position pointer | |
12 | * void *end pointer to end of buffer (last byte + 1) | |
13 | */ | |
14 | ||
c89136ea SW |
15 | static inline u64 ceph_decode_64(void **p) |
16 | { | |
17 | u64 v = get_unaligned_le64(*p); | |
18 | *p += sizeof(u64); | |
19 | return v; | |
20 | } | |
21 | static inline u32 ceph_decode_32(void **p) | |
22 | { | |
23 | u32 v = get_unaligned_le32(*p); | |
24 | *p += sizeof(u32); | |
25 | return v; | |
26 | } | |
27 | static inline u16 ceph_decode_16(void **p) | |
28 | { | |
29 | u16 v = get_unaligned_le16(*p); | |
30 | *p += sizeof(u16); | |
31 | return v; | |
32 | } | |
33 | static inline u8 ceph_decode_8(void **p) | |
34 | { | |
35 | u8 v = *(u8 *)*p; | |
36 | (*p)++; | |
37 | return v; | |
38 | } | |
39 | static inline void ceph_decode_copy(void **p, void *pv, size_t n) | |
40 | { | |
41 | memcpy(pv, *p, n); | |
42 | *p += n; | |
43 | } | |
44 | ||
31b8006e SW |
45 | /* |
46 | * bounds check input. | |
47 | */ | |
48 | #define ceph_decode_need(p, end, n, bad) \ | |
49 | do { \ | |
50 | if (unlikely(*(p) + (n) > (end))) \ | |
51 | goto bad; \ | |
52 | } while (0) | |
53 | ||
31b8006e SW |
54 | #define ceph_decode_64_safe(p, end, v, bad) \ |
55 | do { \ | |
56 | ceph_decode_need(p, end, sizeof(u64), bad); \ | |
c89136ea | 57 | v = ceph_decode_64(p); \ |
31b8006e SW |
58 | } while (0) |
59 | #define ceph_decode_32_safe(p, end, v, bad) \ | |
60 | do { \ | |
61 | ceph_decode_need(p, end, sizeof(u32), bad); \ | |
c89136ea | 62 | v = ceph_decode_32(p); \ |
31b8006e SW |
63 | } while (0) |
64 | #define ceph_decode_16_safe(p, end, v, bad) \ | |
65 | do { \ | |
66 | ceph_decode_need(p, end, sizeof(u16), bad); \ | |
c89136ea | 67 | v = ceph_decode_16(p); \ |
31b8006e | 68 | } while (0) |
c7e337d6 SW |
69 | #define ceph_decode_8_safe(p, end, v, bad) \ |
70 | do { \ | |
71 | ceph_decode_need(p, end, sizeof(u8), bad); \ | |
72 | v = ceph_decode_8(p); \ | |
73 | } while (0) | |
31b8006e SW |
74 | |
75 | #define ceph_decode_copy_safe(p, end, pv, n, bad) \ | |
76 | do { \ | |
77 | ceph_decode_need(p, end, n, bad); \ | |
78 | ceph_decode_copy(p, pv, n); \ | |
79 | } while (0) | |
80 | ||
81 | /* | |
82 | * struct ceph_timespec <-> struct timespec | |
83 | */ | |
c89136ea | 84 | static inline void ceph_decode_timespec(struct timespec *ts, |
63f2d211 | 85 | const struct ceph_timespec *tv) |
c89136ea SW |
86 | { |
87 | ts->tv_sec = le32_to_cpu(tv->tv_sec); | |
88 | ts->tv_nsec = le32_to_cpu(tv->tv_nsec); | |
89 | } | |
90 | static inline void ceph_encode_timespec(struct ceph_timespec *tv, | |
63f2d211 | 91 | const struct timespec *ts) |
c89136ea SW |
92 | { |
93 | tv->tv_sec = cpu_to_le32(ts->tv_sec); | |
94 | tv->tv_nsec = cpu_to_le32(ts->tv_nsec); | |
95 | } | |
31b8006e | 96 | |
63f2d211 SW |
97 | /* |
98 | * sockaddr_storage <-> ceph_sockaddr | |
99 | */ | |
100 | static inline void ceph_encode_addr(struct ceph_entity_addr *a) | |
101 | { | |
cd84db6e YS |
102 | __be16 ss_family = htons(a->in_addr.ss_family); |
103 | a->in_addr.ss_family = *(__u16 *)&ss_family; | |
63f2d211 SW |
104 | } |
105 | static inline void ceph_decode_addr(struct ceph_entity_addr *a) | |
106 | { | |
cd84db6e YS |
107 | __be16 ss_family = *(__be16 *)&a->in_addr.ss_family; |
108 | a->in_addr.ss_family = ntohs(ss_family); | |
4e7a5dcd | 109 | WARN_ON(a->in_addr.ss_family == 512); |
63f2d211 SW |
110 | } |
111 | ||
31b8006e SW |
112 | /* |
113 | * encoders | |
114 | */ | |
c89136ea SW |
115 | static inline void ceph_encode_64(void **p, u64 v) |
116 | { | |
117 | put_unaligned_le64(v, (__le64 *)*p); | |
118 | *p += sizeof(u64); | |
119 | } | |
120 | static inline void ceph_encode_32(void **p, u32 v) | |
121 | { | |
122 | put_unaligned_le32(v, (__le32 *)*p); | |
123 | *p += sizeof(u32); | |
124 | } | |
125 | static inline void ceph_encode_16(void **p, u16 v) | |
126 | { | |
127 | put_unaligned_le16(v, (__le16 *)*p); | |
128 | *p += sizeof(u16); | |
129 | } | |
130 | static inline void ceph_encode_8(void **p, u8 v) | |
131 | { | |
132 | *(u8 *)*p = v; | |
133 | (*p)++; | |
134 | } | |
4e7a5dcd SW |
135 | static inline void ceph_encode_copy(void **p, const void *s, int len) |
136 | { | |
137 | memcpy(*p, s, len); | |
138 | *p += len; | |
139 | } | |
31b8006e SW |
140 | |
141 | /* | |
142 | * filepath, string encoders | |
143 | */ | |
144 | static inline void ceph_encode_filepath(void **p, void *end, | |
145 | u64 ino, const char *path) | |
146 | { | |
147 | u32 len = path ? strlen(path) : 0; | |
148 | BUG_ON(*p + sizeof(ino) + sizeof(len) + len > end); | |
ac8839d7 | 149 | ceph_encode_8(p, 1); |
31b8006e SW |
150 | ceph_encode_64(p, ino); |
151 | ceph_encode_32(p, len); | |
152 | if (len) | |
153 | memcpy(*p, path, len); | |
154 | *p += len; | |
155 | } | |
156 | ||
157 | static inline void ceph_encode_string(void **p, void *end, | |
158 | const char *s, u32 len) | |
159 | { | |
160 | BUG_ON(*p + sizeof(len) + len > end); | |
161 | ceph_encode_32(p, len); | |
162 | if (len) | |
163 | memcpy(*p, s, len); | |
164 | *p += len; | |
165 | } | |
166 | ||
c7e337d6 SW |
167 | #define ceph_encode_need(p, end, n, bad) \ |
168 | do { \ | |
169 | if (unlikely(*(p) + (n) > (end))) \ | |
170 | goto bad; \ | |
171 | } while (0) | |
172 | ||
173 | #define ceph_encode_64_safe(p, end, v, bad) \ | |
174 | do { \ | |
175 | ceph_encode_need(p, end, sizeof(u64), bad); \ | |
176 | ceph_encode_64(p, v); \ | |
177 | } while (0) | |
178 | #define ceph_encode_32_safe(p, end, v, bad) \ | |
179 | do { \ | |
180 | ceph_encode_need(p, end, sizeof(u32), bad); \ | |
181 | ceph_encode_32(p, v); \ | |
182 | } while (0) | |
183 | #define ceph_encode_16_safe(p, end, v, bad) \ | |
184 | do { \ | |
185 | ceph_encode_need(p, end, sizeof(u16), bad); \ | |
186 | ceph_encode_16(p, v); \ | |
187 | } while (0) | |
188 | ||
189 | #define ceph_encode_copy_safe(p, end, pv, n, bad) \ | |
190 | do { \ | |
191 | ceph_encode_need(p, end, n, bad); \ | |
192 | ceph_encode_copy(p, pv, n); \ | |
193 | } while (0) | |
ae1533b6 YS |
194 | #define ceph_encode_string_safe(p, end, s, n, bad) \ |
195 | do { \ | |
196 | ceph_encode_need(p, end, n, bad); \ | |
197 | ceph_encode_string(p, end, s, n); \ | |
198 | } while (0) | |
c7e337d6 | 199 | |
31b8006e SW |
200 | |
201 | #endif |