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generated by cgit v1.2.3 (git 2.25.1) at 2024-07-08 15:50:49 +0000
n class="kt">void __user *src, void *dst, int len, __wsum sum, int *err_ptr) { if (access_ok(VERIFY_READ, src, len)) return csum_partial_copy_from_user(src, dst, len, sum, err_ptr); if (len) *err_ptr = -EFAULT; return sum; } #endif #ifndef HAVE_CSUM_COPY_USER static __inline__ __wsum csum_and_copy_to_user (const void *src, void __user *dst, int len, __wsum sum, int *err_ptr) { sum = csum_partial(src, len, sum); if (access_ok(VERIFY_WRITE, dst, len)) { if (copy_to_user(dst, src, len) == 0) return sum; } if (len) *err_ptr = -EFAULT; return (__force __wsum)-1; /* invalid checksum */ } #endif static inline __wsum csum_add(__wsum csum, __wsum addend) { u32 res = (__force u32)csum; res += (__force u32)addend; return (__force __wsum)(res + (res < (__force u32)addend)); } static inline __wsum csum_sub(__wsum csum, __wsum addend) { return csum_add(csum, ~addend); } static inline __wsum csum_block_add(__wsum csum, __wsum csum2, int offset) { u32 sum = (__force u32)csum2; if (offset&1) sum = ((sum&0xFF00FF)<<8)+((sum>>8)&0xFF00FF); return csum_add(csum, (__force __wsum)sum); } static inline __wsum csum_block_sub(__wsum csum, __wsum csum2, int offset) { u32 sum = (__force u32)csum2; if (offset&1) sum = ((sum&0xFF00FF)<<8)+((sum>>8)&0xFF00FF); return csum_sub(csum, (__force __wsum)sum); } static inline __wsum csum_unfold(__sum16 n) { return (__force __wsum)n; } #define CSUM_MANGLED_0 ((__force __sum16)0xffff) static inline void csum_replace4(__sum16 *sum, __be32 from, __be32 to) { __be32 diff[] = { ~from, to }; *sum = csum_fold(csum_partial((char *)diff, sizeof(diff), ~csum_unfold(*sum))); } static inline void csum_replace2(__sum16 *sum, __be16 from, __be16 to) { csum_replace4(sum, (__force __be32)from, (__force __be32)to); } struct sk_buff; extern void inet_proto_csum_replace4(__sum16 *sum, struct sk_buff *skb, __be32 from, __be32 to, int pseudohdr); static inline void inet_proto_csum_replace2(__sum16 *sum, struct sk_buff *skb, __be16 from, __be16 to, int pseudohdr) { inet_proto_csum_replace4(sum, skb, (__force __be32)from, (__force __be32)to, pseudohdr); } #endif