SCTP: Update RCU handling during the ADD-IP case

[safe/jmp/linux-2.6] / include / net / inet6_hashtables.h

diff --git a/include/net/inet6_hashtables.h b/include/net/inet6_hashtables.h
index 297c2b1..668056b 100644 (file)
--- a/include/net/inet6_hashtables.h
+++ b/include/net/inet6_hashtables.h
@@ -14,13 +14,79 @@
 #ifndef _INET6_HASHTABLES_H
 #define _INET6_HASHTABLES_H
 
+
+#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
+#include <linux/in6.h>
+#include <linux/ipv6.h>
 #include <linux/types.h>
+#include <linux/jhash.h>
+
+#include <net/inet_sock.h>
+
+#include <net/ipv6.h>
 
-struct in6_addr;
 struct inet_hashinfo;
 
+/* I have no idea if this is a good hash for v6 or not. -DaveM */
+static inline unsigned int inet6_ehashfn(const struct in6_addr *laddr, const u16 lport,
+                               const struct in6_addr *faddr, const __be16 fport)
+{
+       u32 ports = (lport ^ (__force u16)fport);
+
+       return jhash_3words((__force u32)laddr->s6_addr32[3],
+                           (__force u32)faddr->s6_addr32[3],
+                           ports, inet_ehash_secret);
+}
+
+static inline int inet6_sk_ehashfn(const struct sock *sk)
+{
+       const struct inet_sock *inet = inet_sk(sk);
+       const struct ipv6_pinfo *np = inet6_sk(sk);
+       const struct in6_addr *laddr = &np->rcv_saddr;
+       const struct in6_addr *faddr = &np->daddr;
+       const __u16 lport = inet->num;
+       const __be16 fport = inet->dport;
+       return inet6_ehashfn(laddr, lport, faddr, fport);
+}
+
+extern void __inet6_hash(struct inet_hashinfo *hashinfo, struct sock *sk);
+
+/*
+ * Sockets in TCP_CLOSE state are _always_ taken out of the hash, so
+ * we need not check it for TCP lookups anymore, thanks Alexey. -DaveM
+ *
+ * The sockhash lock must be held as a reader here.
+ */
+extern struct sock *__inet6_lookup_established(struct inet_hashinfo *hashinfo,
+                                          const struct in6_addr *saddr,
+                                          const __be16 sport,
+                                          const struct in6_addr *daddr,
+                                          const u16 hnum,
+                                          const int dif);
+
+extern struct sock *inet6_lookup_listener(struct inet_hashinfo *hashinfo,
+                                         const struct in6_addr *daddr,
+                                         const unsigned short hnum,
+                                         const int dif);
+
+static inline struct sock *__inet6_lookup(struct inet_hashinfo *hashinfo,
+                                         const struct in6_addr *saddr,
+                                         const __be16 sport,
+                                         const struct in6_addr *daddr,
+                                         const u16 hnum,
+                                         const int dif)
+{
+       struct sock *sk = __inet6_lookup_established(hashinfo, saddr, sport,
+                                                    daddr, hnum, dif);
+       if (sk)
+               return sk;
+
+       return inet6_lookup_listener(hashinfo, daddr, hnum, dif);
+}
+
 extern struct sock *inet6_lookup(struct inet_hashinfo *hashinfo,
-                                const struct in6_addr *saddr, const u16 sport,
-                                const struct in6_addr *daddr, const u16 dport,
+                                const struct in6_addr *saddr, const __be16 sport,
+                                const struct in6_addr *daddr, const __be16 dport,
                                 const int dif);
+#endif /* defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) */
 #endif /* _INET6_HASHTABLES_H */