linux/ceph/decode.h

16  *   void *end    pointer to end of buffer (last byte + 1)
52 static inline bool ceph_has_room(void **p, void *end, size_t n)
54 	return end >= *p && n <= end - *p;
57 #define ceph_decode_need(p, end, n, bad)			\
59 		if (!likely(ceph_has_room(p, end, n)))		\
63 #define ceph_decode_64_safe(p, end, v, bad)			\
65 		ceph_decode_need(p, end, sizeof(u64), bad);	\
68 #define ceph_decode_32_safe(p, end, v, bad)			\
70 		ceph_decode_need(p, end, sizeof(u32), bad);	\
73 #define ceph_decode_16_safe(p, end, v, bad)			\
75 		ceph_decode_need(p, end, sizeof(u16), bad);	\
78 #define ceph_decode_8_safe(p, end, v, bad)			\
80 		ceph_decode_need(p, end, sizeof(u8), bad);	\
84 #define ceph_decode_copy_safe(p, end, pv, n, bad)		\
86 		ceph_decode_need(p, end, n, bad);		\
104  *     beyond the "end" pointer provided (-ERANGE)
107 static inline char *ceph_extract_encoded_string(void **p, void *end,
114 	ceph_decode_32_safe(&sp, end, len, bad);
115 	if (!ceph_has_room(&sp, end, len))
139 #define ceph_decode_skip_n(p, end, n, bad)			\
141 		ceph_decode_need(p, end, n, bad);		\
145 #define ceph_decode_skip_64(p, end, bad)			\
146 ceph_decode_skip_n(p, end, sizeof(u64), bad)
148 #define ceph_decode_skip_32(p, end, bad)			\
149 ceph_decode_skip_n(p, end, sizeof(u32), bad)
151 #define ceph_decode_skip_16(p, end, bad)			\
152 ceph_decode_skip_n(p, end, sizeof(u16), bad)
154 #define ceph_decode_skip_8(p, end, bad)				\
155 ceph_decode_skip_n(p, end, sizeof(u8), bad)
157 #define ceph_decode_skip_string(p, end, bad)			\
161 		ceph_decode_32_safe(p, end, len, bad);		\
162 		ceph_decode_skip_n(p, end, len, bad);		\
165 #define ceph_decode_skip_set(p, end, type, bad)			\
169 		ceph_decode_32_safe(p, end, len, bad);		\
171 			ceph_decode_skip_##type(p, end, bad);	\
174 #define ceph_decode_skip_map(p, end, ktype, vtype, bad)		\
178 		ceph_decode_32_safe(p, end, len, bad);		\
180 			ceph_decode_skip_##ktype(p, end, bad);	\
181 			ceph_decode_skip_##vtype(p, end, bad);	\
185 #define ceph_decode_skip_map_of_map(p, end, ktype1, ktype2, vtype2, bad) \
189 		ceph_decode_32_safe(p, end, len, bad);		\
191 			ceph_decode_skip_##ktype1(p, end, bad);	\
192 			ceph_decode_skip_map(p, end, ktype2, vtype2, bad); \
242 extern int ceph_decode_entity_addr(void **p, void *end,
244 int ceph_decode_entity_addrvec(void **p, void *end, bool msgr2,
282 static inline void ceph_encode_filepath(void **p, void *end,
286 	BUG_ON(*p + 1 + sizeof(ino) + sizeof(len) + len > end);
295 static inline void ceph_encode_string(void **p, void *end,
298 	BUG_ON(*p + sizeof(len) + len > end);
336 static inline int ceph_start_decoding(void **p, void *end, u8 v,
342 	ceph_decode_need(p, end, CEPH_ENCODING_START_BLK_LEN, bad);
352 	ceph_decode_need(p, end, *struct_len, bad);
359 #define ceph_encode_need(p, end, n, bad)			\
361 		if (!likely(ceph_has_room(p, end, n)))		\
365 #define ceph_encode_64_safe(p, end, v, bad)			\
367 		ceph_encode_need(p, end, sizeof(u64), bad);	\
370 #define ceph_encode_32_safe(p, end, v, bad)			\
372 		ceph_encode_need(p, end, sizeof(u32), bad);	\
375 #define ceph_encode_16_safe(p, end, v, bad)			\
377 		ceph_encode_need(p, end, sizeof(u16), bad);	\
380 #define ceph_encode_8_safe(p, end, v, bad)			\
382 		ceph_encode_need(p, end, sizeof(u8), bad);	\
386 #define ceph_encode_copy_safe(p, end, pv, n, bad)		\
388 		ceph_encode_need(p, end, n, bad);		\
391 #define ceph_encode_string_safe(p, end, s, n, bad)		\
393 		ceph_encode_need(p, end, n, bad);		\
394 		ceph_encode_string(p, end, s, n);		\