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