linux 2.6.16.38 w/ vs2.0.3-rc1

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

diff --git a/include/net/inet6_hashtables.h b/include/net/inet6_hashtables.h
index bc6a71d..25f708f 100644 (file)
--- a/include/net/inet6_hashtables.h
+++ b/include/net/inet6_hashtables.h
@@ -14,6 +14,7 @@
 #ifndef _INET6_HASHTABLES_H
 #define _INET6_HASHTABLES_H
 
+#include <linux/config.h>
 
 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
 #include <linux/in6.h>
@@ -47,7 +48,31 @@ static inline int inet6_sk_ehashfn(const struct sock *sk)
        return inet6_ehashfn(laddr, lport, faddr, fport);
 }
 
-extern void __inet6_hash(struct inet_hashinfo *hashinfo, struct sock *sk);
+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);
+}
 
 /*
  * Sockets in TCP_CLOSE state are _always_ taken out of the hash, so
@@ -55,12 +80,52 @@ extern void __inet6_hash(struct inet_hashinfo *hashinfo, struct sock *sk);
  *
  * The sockhash lock must be held as a reader here.
  */
-extern struct sock *__inet6_lookup_established(struct inet_hashinfo *hashinfo,
+static inline struct sock *
+               __inet6_lookup_established(struct inet_hashinfo *hashinfo,
                                           const struct in6_addr *saddr,
                                           const u16 sport,
                                           const struct in6_addr *daddr,
                                           const u16 hnum,
-                                          const int dif);
+                                          const int dif)
+{
+       struct sock *sk;
+       const struct hlist_node *node;
+       const __u32 ports = INET_COMBINED_PORTS(sport, hnum);
+       /* Optimize here for direct hit, only listening connections can
+        * have wildcards anyways.
+        */
+       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, hash, saddr, daddr, ports, dif))
+                       goto hit; /* You sunk my battleship! */
+       }
+       /* Must check for a TIME_WAIT'er before going to listener hash. */
+       sk_for_each(sk, node, &(head + hashinfo->ehash_size)->chain) {
+               const struct inet_timewait_sock *tw = inet_twsk(sk);
+
+               if(*((__u32 *)&(tw->tw_dport))  == ports        &&
+                  sk->sk_family                == PF_INET6) {
+                       const struct inet6_timewait_sock *tw6 = inet6_twsk(sk);
+
+                       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;
+               }
+       }
+       read_unlock(&head->lock);
+       return NULL;
+
+hit:
+       sock_hold(sk);
+       read_unlock(&head->lock);
+       return sk;
+}
 
 extern struct sock *inet6_lookup_listener(struct inet_hashinfo *hashinfo,
                                          const struct in6_addr *daddr,