static inline bool ipv6_addr_loopback(const struct in6_addr *a)
{
+#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
+ const unsigned long *ul = (const unsigned long *)a;
+
+ return (ul[0] | (ul[1] ^ cpu_to_be64(1))) == 0UL;
+#else
return (a->s6_addr32[0] | a->s6_addr32[1] |
a->s6_addr32[2] | (a->s6_addr32[3] ^ htonl(1))) == 0;
+#endif
}
static inline bool ipv6_addr_v4mapped(const struct in6_addr *a)
{
- return (a->s6_addr32[0] | a->s6_addr32[1] |
- (a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0;
+ return (
+#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
+ *(__be64 *)a |
+#else
+ (a->s6_addr32[0] | a->s6_addr32[1]) |
+#endif
+ (a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0UL;
}
/*
* find the first different bit between two addresses
* length of address must be a multiple of 32bits
*/
-static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen)
+static inline int __ipv6_addr_diff32(const void *token1, const void *token2, int addrlen)
{
const __be32 *a1 = token1, *a2 = token2;
int i;
return addrlen << 5;
}
+#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
+static inline int __ipv6_addr_diff64(const void *token1, const void *token2, int addrlen)
+{
+ const __be64 *a1 = token1, *a2 = token2;
+ int i;
+
+ addrlen >>= 3;
+
+ for (i = 0; i < addrlen; i++) {
+ __be64 xb = a1[i] ^ a2[i];
+ if (xb)
+ return i * 64 + 63 - __fls(be64_to_cpu(xb));
+ }
+
+ return addrlen << 6;
+}
+#endif
+
+static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen)
+{
+#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
+ if (__builtin_constant_p(addrlen) && !(addrlen & 7))
+ return __ipv6_addr_diff64(token1, token2, addrlen);
+#endif
+ return __ipv6_addr_diff32(token1, token2, addrlen);
+}
+
static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2)
{
return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr));
extern void ipv6_select_ident(struct frag_hdr *fhdr, struct rt6_info *rt);
+/*
+ * Header manipulation
+ */
+static inline void ip6_flow_hdr(struct ipv6hdr *hdr, unsigned int tclass,
+ __be32 flowlabel)
+{
+ *(__be32 *)hdr = ntohl(0x60000000 | (tclass << 20)) | flowlabel;
+}
+
+static inline __be32 ip6_flowinfo(const struct ipv6hdr *hdr)
+{
+ return *(__be32 *)hdr & IPV6_FLOWINFO_MASK;
+}
+
/*
* Prototypes exported by ipv6
*/