[IPV6]: Introduce inet6_timewait_sock

[net-next-2.6.git] / include / net / inet6_hashtables.h

diff --git a/include/net/inet6_hashtables.h b/include/net/inet6_hashtables.h
index 03df3b157960cb711bccf0d44fab11127dde1b3b..25f708ff020e9b158e26fe95c56b2706774c8bdf 100644 (file)
--- a/include/net/inet6_hashtables.h
+++ b/include/net/inet6_hashtables.h
@@ -26,19 +26,18 @@
 struct inet_hashinfo;
 
 /* I have no idea if this is a good hash for v6 or not. -DaveM */
-static inline int inet6_ehashfn(const struct in6_addr *laddr, const u16 lport,
-                               const struct in6_addr *faddr, const u16 fport,
-                               const int ehash_size)
+static inline unsigned int inet6_ehashfn(const struct in6_addr *laddr, const u16 lport,
+                               const struct in6_addr *faddr, const u16 fport)
 {
-       int hashent = (lport ^ fport);
+       unsigned int hashent = (lport ^ fport);
 
        hashent ^= (laddr->s6_addr32[3] ^ faddr->s6_addr32[3]);
        hashent ^= hashent >> 16;
        hashent ^= hashent >> 8;
-       return (hashent & (ehash_size - 1));
+       return hashent;
 }
 
-static inline int inet6_sk_ehashfn(const struct sock *sk, const int ehash_size)
+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);
@@ -46,7 +45,33 @@ static inline int inet6_sk_ehashfn(const struct sock *sk, const int ehash_size)
        const struct in6_addr *faddr = &np->daddr;
        const __u16 lport = inet->num;
        const __u16 fport = inet->dport;
-       return inet6_ehashfn(laddr, lport, faddr, fport, ehash_size);
+       return inet6_ehashfn(laddr, lport, faddr, fport);
+}
+
+static inline void __inet6_hash(struct inet_hashinfo *hashinfo,
+                               struct sock *sk)
+{
+       struct hlist_head *list;
+       rwlock_t *lock;
+
+       BUG_TRAP(sk_unhashed(sk));
+
+       if (sk->sk_state == TCP_LISTEN) {
+               list = &hashinfo->listening_hash[inet_sk_listen_hashfn(sk)];
+               lock = &hashinfo->lhash_lock;
+               inet_listen_wlock(hashinfo);
+       } else {
+               unsigned int hash;
+               sk->sk_hash = hash = inet6_sk_ehashfn(sk);
+               hash &= (hashinfo->ehash_size - 1);
+               list = &hashinfo->ehash[hash].chain;
+               lock = &hashinfo->ehash[hash].lock;
+               write_lock(lock);
+       }
+
+       __sk_add_node(sk, list);
+       sock_prot_inc_use(sk->sk_prot);
+       write_unlock(lock);
 }
 
 /*
@@ -69,14 +94,14 @@ static inline struct sock *
        /* Optimize here for direct hit, only listening connections can
         * have wildcards anyways.
         */
-       const int hash = inet6_ehashfn(daddr, hnum, saddr, sport,
-                                      hashinfo->ehash_size);
-       struct inet_ehash_bucket *head = &hashinfo->ehash[hash];
+       unsigned int hash = inet6_ehashfn(daddr, hnum, saddr, sport);
+       struct inet_ehash_bucket *head = inet_ehash_bucket(hashinfo, hash);
 
+       prefetch(head->chain.first);
        read_lock(&head->lock);
        sk_for_each(sk, node, &head->chain) {
                /* For IPV6 do the cheaper port and family tests first. */
-               if (INET6_MATCH(sk, saddr, daddr, ports, dif))
+               if (INET6_MATCH(sk, hash, saddr, daddr, ports, dif))
                        goto hit; /* You sunk my battleship! */
        }
        /* Must check for a TIME_WAIT'er before going to listener hash. */
@@ -85,10 +110,10 @@ static inline struct sock *
 
                if(*((__u32 *)&(tw->tw_dport))  == ports        &&
                   sk->sk_family                == PF_INET6) {
-                       const struct tcp6_timewait_sock *tcp6tw = tcp6_twsk(sk);
+                       const struct inet6_timewait_sock *tw6 = inet6_twsk(sk);
 
-                       if (ipv6_addr_equal(&tcp6tw->tw_v6_daddr, saddr)        &&
-                           ipv6_addr_equal(&tcp6tw->tw_v6_rcv_saddr, daddr)    &&
+                       if (ipv6_addr_equal(&tw6->tw_v6_daddr, saddr)   &&
+                           ipv6_addr_equal(&tw6->tw_v6_rcv_saddr, daddr)       &&
                            (!sk->sk_bound_dev_if || sk->sk_bound_dev_if == dif))
                                goto hit;
                }