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git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - fs/ceph/decode.h
1 #ifndef __CEPH_DECODE_H
2 #define __CEPH_DECODE_H
4 #include <asm/unaligned.h>
10 * void **p pointer to position pointer
11 * void *end pointer to end of buffer (last byte + 1)
14 static inline u64
ceph_decode_64(void **p
)
16 u64 v
= get_unaligned_le64(*p
);
20 static inline u32
ceph_decode_32(void **p
)
22 u32 v
= get_unaligned_le32(*p
);
26 static inline u16
ceph_decode_16(void **p
)
28 u16 v
= get_unaligned_le16(*p
);
32 static inline u8
ceph_decode_8(void **p
)
38 static inline void ceph_decode_copy(void **p
, void *pv
, size_t n
)
47 #define ceph_decode_need(p, end, n, bad) \
49 if (unlikely(*(p) + (n) > (end))) \
53 #define ceph_decode_64_safe(p, end, v, bad) \
55 ceph_decode_need(p, end, sizeof(u64), bad); \
56 v = ceph_decode_64(p); \
58 #define ceph_decode_32_safe(p, end, v, bad) \
60 ceph_decode_need(p, end, sizeof(u32), bad); \
61 v = ceph_decode_32(p); \
63 #define ceph_decode_16_safe(p, end, v, bad) \
65 ceph_decode_need(p, end, sizeof(u16), bad); \
66 v = ceph_decode_16(p); \
69 #define ceph_decode_copy_safe(p, end, pv, n, bad) \
71 ceph_decode_need(p, end, n, bad); \
72 ceph_decode_copy(p, pv, n); \
76 * struct ceph_timespec <-> struct timespec
78 static inline void ceph_decode_timespec(struct timespec
*ts
,
79 const struct ceph_timespec
*tv
)
81 ts
->tv_sec
= le32_to_cpu(tv
->tv_sec
);
82 ts
->tv_nsec
= le32_to_cpu(tv
->tv_nsec
);
84 static inline void ceph_encode_timespec(struct ceph_timespec
*tv
,
85 const struct timespec
*ts
)
87 tv
->tv_sec
= cpu_to_le32(ts
->tv_sec
);
88 tv
->tv_nsec
= cpu_to_le32(ts
->tv_nsec
);
92 * sockaddr_storage <-> ceph_sockaddr
94 static inline void ceph_encode_addr(struct ceph_entity_addr
*a
)
96 a
->in_addr
.ss_family
= htons(a
->in_addr
.ss_family
);
98 static inline void ceph_decode_addr(struct ceph_entity_addr
*a
)
100 a
->in_addr
.ss_family
= ntohs(a
->in_addr
.ss_family
);
106 static inline void ceph_encode_64(void **p
, u64 v
)
108 put_unaligned_le64(v
, (__le64
*)*p
);
111 static inline void ceph_encode_32(void **p
, u32 v
)
113 put_unaligned_le32(v
, (__le32
*)*p
);
116 static inline void ceph_encode_16(void **p
, u16 v
)
118 put_unaligned_le16(v
, (__le16
*)*p
);
121 static inline void ceph_encode_8(void **p
, u8 v
)
128 * filepath, string encoders
130 static inline void ceph_encode_filepath(void **p
, void *end
,
131 u64 ino
, const char *path
)
133 u32 len
= path
? strlen(path
) : 0;
134 BUG_ON(*p
+ sizeof(ino
) + sizeof(len
) + len
> end
);
135 ceph_encode_64(p
, ino
);
136 ceph_encode_32(p
, len
);
138 memcpy(*p
, path
, len
);
142 static inline void ceph_encode_string(void **p
, void *end
,
143 const char *s
, u32 len
)
145 BUG_ON(*p
+ sizeof(len
) + len
> end
);
146 ceph_encode_32(p
, len
);