Merge branch 'master' of /repos/git/net-next-2.6

Conflicts:
	include/net/netfilter/xt_rateest.h
	net/bridge/br_netfilter.c
	net/netfilter/nf_conntrack_core.c

Signed-off-by: Patrick McHardy <kaber@trash.net>

22 files changed, 443 insertions, 503 deletions

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index e1a698df570..b97bb1f3080 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -557,7 +557,7 @@ void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
 		pr_warning("Freeing alive inet6 address %p\n", ifp);
 		return;
 	}
-	dst_release(&ifp->rt->u.dst);
+	dst_release(&ifp->rt->dst);
 
 	call_rcu(&ifp->rcu, inet6_ifa_finish_destroy_rcu);
 }
@@ -823,7 +823,7 @@ static void ipv6_del_addr(struct inet6_ifaddr *ifp)
 				rt->rt6i_flags |= RTF_EXPIRES;
 			}
 		}
-		dst_release(&rt->u.dst);
+		dst_release(&rt->dst);
 	}
 
 out:
@@ -1863,7 +1863,7 @@ void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
 					      dev, expires, flags);
 		}
 		if (rt)
-			dst_release(&rt->u.dst);
+			dst_release(&rt->dst);
 	}
 
 	/* Try to figure out our local address for this prefix */
@@ -4093,11 +4093,11 @@ static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
 		if (ifp->idev->cnf.forwarding)
 			addrconf_leave_anycast(ifp);
 		addrconf_leave_solict(ifp->idev, &ifp->addr);
-		dst_hold(&ifp->rt->u.dst);
+		dst_hold(&ifp->rt->dst);
 
 		if (ifp->state == INET6_IFADDR_STATE_DEAD &&
 		    ip6_del_rt(ifp->rt))
-			dst_free(&ifp->rt->u.dst);
+			dst_free(&ifp->rt->dst);
 		break;
 	}
 }
diff --git a/net/ipv6/addrlabel.c b/net/ipv6/addrlabel.c
index 8c4348cb195..f0e774cea38 100644
--- a/net/ipv6/addrlabel.c
+++ b/net/ipv6/addrlabel.c
@@ -53,11 +53,7 @@ static struct ip6addrlbl_table
 static inline
 struct net *ip6addrlbl_net(const struct ip6addrlbl_entry *lbl)
 {
-#ifdef CONFIG_NET_NS
-	return lbl->lbl_net;
-#else
-	return &init_net;
-#endif
+	return read_pnet(&lbl->lbl_net);
 }
 
 /*
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index e733942dafe..94b1b9c954b 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -651,7 +651,7 @@ int inet6_sk_rebuild_header(struct sock *sk)
 
 	if (dst == NULL) {
 		struct inet_sock *inet = inet_sk(sk);
-		struct in6_addr *final_p = NULL, final;
+		struct in6_addr *final_p, final;
 		struct flowi fl;
 
 		memset(&fl, 0, sizeof(fl));
@@ -665,12 +665,7 @@ int inet6_sk_rebuild_header(struct sock *sk)
 		fl.fl_ip_sport = inet->inet_sport;
 		security_sk_classify_flow(sk, &fl);
 
-		if (np->opt && np->opt->srcrt) {
-			struct rt0_hdr *rt0 = (struct rt0_hdr *) np->opt->srcrt;
-			ipv6_addr_copy(&final, &fl.fl6_dst);
-			ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
-			final_p = &final;
-		}
+		final_p = fl6_update_dst(&fl, np->opt, &final);
 
 		err = ip6_dst_lookup(sk, &dst, &fl);
 		if (err) {
diff --git a/net/ipv6/anycast.c b/net/ipv6/anycast.c
index b5b07054508..0e5e943446f 100644
--- a/net/ipv6/anycast.c
+++ b/net/ipv6/anycast.c
@@ -77,41 +77,40 @@ int ipv6_sock_ac_join(struct sock *sk, int ifindex, struct in6_addr *addr)
 	pac->acl_next = NULL;
 	ipv6_addr_copy(&pac->acl_addr, addr);
 
+	rcu_read_lock();
 	if (ifindex == 0) {
 		struct rt6_info *rt;
 
 		rt = rt6_lookup(net, addr, NULL, 0, 0);
 		if (rt) {
 			dev = rt->rt6i_dev;
-			dev_hold(dev);
-			dst_release(&rt->u.dst);
+			dst_release(&rt->dst);
 		} else if (ishost) {
 			err = -EADDRNOTAVAIL;
-			goto out_free_pac;
+			goto error;
 		} else {
 			/* router, no matching interface: just pick one */
-
-			dev = dev_get_by_flags(net, IFF_UP, IFF_UP|IFF_LOOPBACK);
+			dev = dev_get_by_flags_rcu(net, IFF_UP,
+						   IFF_UP | IFF_LOOPBACK);
 		}
 	} else
-		dev = dev_get_by_index(net, ifindex);
+		dev = dev_get_by_index_rcu(net, ifindex);
 
 	if (dev == NULL) {
 		err = -ENODEV;
-		goto out_free_pac;
+		goto error;
 	}
 
-	idev = in6_dev_get(dev);
+	idev = __in6_dev_get(dev);
 	if (!idev) {
 		if (ifindex)
 			err = -ENODEV;
 		else
 			err = -EADDRNOTAVAIL;
-		goto out_dev_put;
+		goto error;
 	}
 	/* reset ishost, now that we have a specific device */
 	ishost = !idev->cnf.forwarding;
-	in6_dev_put(idev);
 
 	pac->acl_ifindex = dev->ifindex;
 
@@ -124,26 +123,22 @@ int ipv6_sock_ac_join(struct sock *sk, int ifindex, struct in6_addr *addr)
 		if (ishost)
 			err = -EADDRNOTAVAIL;
 		if (err)
-			goto out_dev_put;
+			goto error;
 	}
 
 	err = ipv6_dev_ac_inc(dev, addr);
-	if (err)
-		goto out_dev_put;
-
-	write_lock_bh(&ipv6_sk_ac_lock);
-	pac->acl_next = np->ipv6_ac_list;
-	np->ipv6_ac_list = pac;
-	write_unlock_bh(&ipv6_sk_ac_lock);
-
-	dev_put(dev);
-
-	return 0;
+	if (!err) {
+		write_lock_bh(&ipv6_sk_ac_lock);
+		pac->acl_next = np->ipv6_ac_list;
+		np->ipv6_ac_list = pac;
+		write_unlock_bh(&ipv6_sk_ac_lock);
+		pac = NULL;
+	}
 
-out_dev_put:
-	dev_put(dev);
-out_free_pac:
-	sock_kfree_s(sk, pac, sizeof(*pac));
+error:
+	rcu_read_unlock();
+	if (pac)
+		sock_kfree_s(sk, pac, sizeof(*pac));
 	return err;
 }
 
@@ -176,11 +171,12 @@ int ipv6_sock_ac_drop(struct sock *sk, int ifindex, struct in6_addr *addr)
 
 	write_unlock_bh(&ipv6_sk_ac_lock);
 
-	dev = dev_get_by_index(net, pac->acl_ifindex);
-	if (dev) {
+	rcu_read_lock();
+	dev = dev_get_by_index_rcu(net, pac->acl_ifindex);
+	if (dev)
 		ipv6_dev_ac_dec(dev, &pac->acl_addr);
-		dev_put(dev);
-	}
+	rcu_read_unlock();
+
 	sock_kfree_s(sk, pac, sizeof(*pac));
 	return 0;
 }
@@ -199,13 +195,12 @@ void ipv6_sock_ac_close(struct sock *sk)
 	write_unlock_bh(&ipv6_sk_ac_lock);
 
 	prev_index = 0;
+	rcu_read_lock();
 	while (pac) {
 		struct ipv6_ac_socklist *next = pac->acl_next;
 
 		if (pac->acl_ifindex != prev_index) {
-			if (dev)
-				dev_put(dev);
-			dev = dev_get_by_index(net, pac->acl_ifindex);
+			dev = dev_get_by_index_rcu(net, pac->acl_ifindex);
 			prev_index = pac->acl_ifindex;
 		}
 		if (dev)
@@ -213,8 +208,7 @@ void ipv6_sock_ac_close(struct sock *sk)
 		sock_kfree_s(sk, pac, sizeof(*pac));
 		pac = next;
 	}
-	if (dev)
-		dev_put(dev);
+	rcu_read_unlock();
 }
 
 #if 0
@@ -250,7 +244,7 @@ static void aca_put(struct ifacaddr6 *ac)
 {
 	if (atomic_dec_and_test(&ac->aca_refcnt)) {
 		in6_dev_put(ac->aca_idev);
-		dst_release(&ac->aca_rt->u.dst);
+		dst_release(&ac->aca_rt->dst);
 		kfree(ac);
 	}
 }
@@ -356,40 +350,39 @@ int __ipv6_dev_ac_dec(struct inet6_dev *idev, struct in6_addr *addr)
 	write_unlock_bh(&idev->lock);
 	addrconf_leave_solict(idev, &aca->aca_addr);
 
-	dst_hold(&aca->aca_rt->u.dst);
+	dst_hold(&aca->aca_rt->dst);
 	ip6_del_rt(aca->aca_rt);
 
 	aca_put(aca);
 	return 0;
 }
 
+/* called with rcu_read_lock() */
 static int ipv6_dev_ac_dec(struct net_device *dev, struct in6_addr *addr)
 {
-	int ret;
-	struct inet6_dev *idev = in6_dev_get(dev);
+	struct inet6_dev *idev = __in6_dev_get(dev);
+
 	if (idev == NULL)
 		return -ENODEV;
-	ret = __ipv6_dev_ac_dec(idev, addr);
-	in6_dev_put(idev);
-	return ret;
+	return __ipv6_dev_ac_dec(idev, addr);
 }
 
 /*
  *	check if the interface has this anycast address
+ *	called with rcu_read_lock()
  */
 static int ipv6_chk_acast_dev(struct net_device *dev, struct in6_addr *addr)
 {
 	struct inet6_dev *idev;
 	struct ifacaddr6 *aca;
 
-	idev = in6_dev_get(dev);
+	idev = __in6_dev_get(dev);
 	if (idev) {
 		read_lock_bh(&idev->lock);
 		for (aca = idev->ac_list; aca; aca = aca->aca_next)
 			if (ipv6_addr_equal(&aca->aca_addr, addr))
 				break;
 		read_unlock_bh(&idev->lock);
-		in6_dev_put(idev);
 		return aca != NULL;
 	}
 	return 0;
@@ -403,14 +396,15 @@ int ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
 {
 	int found = 0;
 
-	if (dev)
-		return ipv6_chk_acast_dev(dev, addr);
 	rcu_read_lock();
-	for_each_netdev_rcu(net, dev)
-		if (ipv6_chk_acast_dev(dev, addr)) {
-			found = 1;
-			break;
-		}
+	if (dev)
+		found = ipv6_chk_acast_dev(dev, addr);
+	else
+		for_each_netdev_rcu(net, dev)
+			if (ipv6_chk_acast_dev(dev, addr)) {
+				found = 1;
+				break;
+			}
 	rcu_read_unlock();
 	return found;
 }
diff --git a/net/ipv6/datagram.c b/net/ipv6/datagram.c
index 712684687c9..7d929a22cbc 100644
--- a/net/ipv6/datagram.c
+++ b/net/ipv6/datagram.c
@@ -38,10 +38,11 @@ int ip6_datagram_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
 	struct sockaddr_in6	*usin = (struct sockaddr_in6 *) uaddr;
 	struct inet_sock      	*inet = inet_sk(sk);
 	struct ipv6_pinfo      	*np = inet6_sk(sk);
-	struct in6_addr		*daddr, *final_p = NULL, final;
+	struct in6_addr		*daddr, *final_p, final;
 	struct dst_entry	*dst;
 	struct flowi		fl;
 	struct ip6_flowlabel	*flowlabel = NULL;
+	struct ipv6_txoptions   *opt;
 	int			addr_type;
 	int			err;
 
@@ -155,19 +156,8 @@ ipv4_connected:
 
 	security_sk_classify_flow(sk, &fl);
 
-	if (flowlabel) {
-		if (flowlabel->opt && flowlabel->opt->srcrt) {
-			struct rt0_hdr *rt0 = (struct rt0_hdr *) flowlabel->opt->srcrt;
-			ipv6_addr_copy(&final, &fl.fl6_dst);
-			ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
-			final_p = &final;
-		}
-	} else if (np->opt && np->opt->srcrt) {
-		struct rt0_hdr *rt0 = (struct rt0_hdr *)np->opt->srcrt;
-		ipv6_addr_copy(&final, &fl.fl6_dst);
-		ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
-		final_p = &final;
-	}
+	opt = flowlabel ? flowlabel->opt : np->opt;
+	final_p = fl6_update_dst(&fl, opt, &final);
 
 	err = ip6_dst_lookup(sk, &dst, &fl);
 	if (err)
diff --git a/net/ipv6/exthdrs.c b/net/ipv6/exthdrs.c
index 8a659f92d17..262f105d23b 100644
--- a/net/ipv6/exthdrs.c
+++ b/net/ipv6/exthdrs.c
@@ -312,6 +312,7 @@ static int ipv6_destopt_rcv(struct sk_buff *skb)
   Routing header.
  ********************************/
 
+/* called with rcu_read_lock() */
 static int ipv6_rthdr_rcv(struct sk_buff *skb)
 {
 	struct inet6_skb_parm *opt = IP6CB(skb);
@@ -324,12 +325,9 @@ static int ipv6_rthdr_rcv(struct sk_buff *skb)
 	struct net *net = dev_net(skb->dev);
 	int accept_source_route = net->ipv6.devconf_all->accept_source_route;
 
-	idev = in6_dev_get(skb->dev);
-	if (idev) {
-		if (accept_source_route > idev->cnf.accept_source_route)
-			accept_source_route = idev->cnf.accept_source_route;
-		in6_dev_put(idev);
-	}
+	idev = __in6_dev_get(skb->dev);
+	if (idev && accept_source_route > idev->cnf.accept_source_route)
+		accept_source_route = idev->cnf.accept_source_route;
 
 	if (!pskb_may_pull(skb, skb_transport_offset(skb) + 8) ||
 	    !pskb_may_pull(skb, (skb_transport_offset(skb) +
@@ -874,3 +872,27 @@ struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space,
 	return opt;
 }
 
+/**
+ * fl6_update_dst - update flowi destination address with info given
+ *                  by srcrt option, if any.
+ *
+ * @fl: flowi for which fl6_dst is to be updated
+ * @opt: struct ipv6_txoptions in which to look for srcrt opt
+ * @orig: copy of original fl6_dst address if modified
+ *
+ * Returns NULL if no txoptions or no srcrt, otherwise returns orig
+ * and initial value of fl->fl6_dst set in orig
+ */
+struct in6_addr *fl6_update_dst(struct flowi *fl,
+				const struct ipv6_txoptions *opt,
+				struct in6_addr *orig)
+{
+	if (!opt || !opt->srcrt)
+		return NULL;
+
+	ipv6_addr_copy(orig, &fl->fl6_dst);
+	ipv6_addr_copy(&fl->fl6_dst, ((struct rt0_hdr *)opt->srcrt)->addr);
+	return orig;
+}
+
+EXPORT_SYMBOL_GPL(fl6_update_dst);
diff --git a/net/ipv6/fib6_rules.c b/net/ipv6/fib6_rules.c
index 8e44f8f9c18..b1108ede18e 100644
--- a/net/ipv6/fib6_rules.c
+++ b/net/ipv6/fib6_rules.c
@@ -43,8 +43,8 @@ struct dst_entry *fib6_rule_lookup(struct net *net, struct flowi *fl,
 	if (arg.result)
 		return arg.result;
 
-	dst_hold(&net->ipv6.ip6_null_entry->u.dst);
-	return &net->ipv6.ip6_null_entry->u.dst;
+	dst_hold(&net->ipv6.ip6_null_entry->dst);
+	return &net->ipv6.ip6_null_entry->dst;
 }
 
 static int fib6_rule_action(struct fib_rule *rule, struct flowi *flp,
@@ -86,7 +86,7 @@ static int fib6_rule_action(struct fib_rule *rule, struct flowi *flp,
 			struct in6_addr saddr;
 
 			if (ipv6_dev_get_saddr(net,
-					       ip6_dst_idev(&rt->u.dst)->dev,
+					       ip6_dst_idev(&rt->dst)->dev,
 					       &flp->fl6_dst,
 					       rt6_flags2srcprefs(flags),
 					       &saddr))
@@ -99,12 +99,12 @@ static int fib6_rule_action(struct fib_rule *rule, struct flowi *flp,
 		goto out;
 	}
 again:
-	dst_release(&rt->u.dst);
+	dst_release(&rt->dst);
 	rt = NULL;
 	goto out;
 
 discard_pkt:
-	dst_hold(&rt->u.dst);
+	dst_hold(&rt->dst);
 out:
 	arg->result = rt;
 	return rt == NULL ? -EAGAIN : 0;
diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c
index ce799298255..03e62f94ff8 100644
--- a/net/ipv6/icmp.c
+++ b/net/ipv6/icmp.c
@@ -483,7 +483,7 @@ route_done:
 			      np->tclass, NULL, &fl, (struct rt6_info*)dst,
 			      MSG_DONTWAIT, np->dontfrag);
 	if (err) {
-		ICMP6_INC_STATS_BH(net, idev, ICMP6_MIB_OUTMSGS);
+		ICMP6_INC_STATS_BH(net, idev, ICMP6_MIB_OUTERRORS);
 		ip6_flush_pending_frames(sk);
 		goto out_put;
 	}
@@ -565,7 +565,7 @@ static void icmpv6_echo_reply(struct sk_buff *skb)
 				np->dontfrag);
 
 	if (err) {
-		ICMP6_INC_STATS_BH(net, idev, ICMP6_MIB_OUTMSGS);
+		ICMP6_INC_STATS_BH(net, idev, ICMP6_MIB_OUTERRORS);
 		ip6_flush_pending_frames(sk);
 		goto out_put;
 	}
diff --git a/net/ipv6/inet6_connection_sock.c b/net/ipv6/inet6_connection_sock.c
index 0c5e3c3b7fd..8a1628023bd 100644
--- a/net/ipv6/inet6_connection_sock.c
+++ b/net/ipv6/inet6_connection_sock.c
@@ -185,7 +185,7 @@ int inet6_csk_xmit(struct sk_buff *skb)
 	struct ipv6_pinfo *np = inet6_sk(sk);
 	struct flowi fl;
 	struct dst_entry *dst;
-	struct in6_addr *final_p = NULL, final;
+	struct in6_addr *final_p, final;
 
 	memset(&fl, 0, sizeof(fl));
 	fl.proto = sk->sk_protocol;
@@ -199,12 +199,7 @@ int inet6_csk_xmit(struct sk_buff *skb)
 	fl.fl_ip_dport = inet->inet_dport;
 	security_sk_classify_flow(sk, &fl);
 
-	if (np->opt && np->opt->srcrt) {
-		struct rt0_hdr *rt0 = (struct rt0_hdr *)np->opt->srcrt;
-		ipv6_addr_copy(&final, &fl.fl6_dst);
-		ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
-		final_p = &final;
-	}
+	final_p = fl6_update_dst(&fl, np->opt, &final);
 
 	dst = __inet6_csk_dst_check(sk, np->dst_cookie);
 
diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c
index 92a122b7795..b6a585909d3 100644
--- a/net/ipv6/ip6_fib.c
+++ b/net/ipv6/ip6_fib.c
@@ -165,7 +165,7 @@ static __inline__ void node_free(struct fib6_node * fn)
 static __inline__ void rt6_release(struct rt6_info *rt)
 {
 	if (atomic_dec_and_test(&rt->rt6i_ref))
-		dst_free(&rt->u.dst);
+		dst_free(&rt->dst);
 }
 
 static void fib6_link_table(struct net *net, struct fib6_table *tb)
@@ -278,7 +278,7 @@ static int fib6_dump_node(struct fib6_walker_t *w)
 	int res;
 	struct rt6_info *rt;
 
-	for (rt = w->leaf; rt; rt = rt->u.dst.rt6_next) {
+	for (rt = w->leaf; rt; rt = rt->dst.rt6_next) {
 		res = rt6_dump_route(rt, w->args);
 		if (res < 0) {
 			/* Frame is full, suspend walking */
@@ -619,7 +619,7 @@ static int fib6_add_rt2node(struct fib6_node *fn, struct rt6_info *rt,
 
 	ins = &fn->leaf;
 
-	for (iter = fn->leaf; iter; iter=iter->u.dst.rt6_next) {
+	for (iter = fn->leaf; iter; iter=iter->dst.rt6_next) {
 		/*
 		 *	Search for duplicates
 		 */
@@ -647,7 +647,7 @@ static int fib6_add_rt2node(struct fib6_node *fn, struct rt6_info *rt,
 		if (iter->rt6i_metric > rt->rt6i_metric)
 			break;
 
-		ins = &iter->u.dst.rt6_next;
+		ins = &iter->dst.rt6_next;
 	}
 
 	/* Reset round-robin state, if necessary */
@@ -658,7 +658,7 @@ static int fib6_add_rt2node(struct fib6_node *fn, struct rt6_info *rt,
 	 *	insert node
 	 */
 
-	rt->u.dst.rt6_next = iter;
+	rt->dst.rt6_next = iter;
 	*ins = rt;
 	rt->rt6i_node = fn;
 	atomic_inc(&rt->rt6i_ref);
@@ -799,7 +799,7 @@ out:
 			atomic_inc(&pn->leaf->rt6i_ref);
 		}
 #endif
-		dst_free(&rt->u.dst);
+		dst_free(&rt->dst);
 	}
 	return err;
 
@@ -810,7 +810,7 @@ out:
 st_failure:
 	if (fn && !(fn->fn_flags & (RTN_RTINFO|RTN_ROOT)))
 		fib6_repair_tree(info->nl_net, fn);
-	dst_free(&rt->u.dst);
+	dst_free(&rt->dst);
 	return err;
 #endif
 }
@@ -1108,7 +1108,7 @@ static void fib6_del_route(struct fib6_node *fn, struct rt6_info **rtp,
 	RT6_TRACE("fib6_del_route\n");
 
 	/* Unlink it */
-	*rtp = rt->u.dst.rt6_next;
+	*rtp = rt->dst.rt6_next;
 	rt->rt6i_node = NULL;
 	net->ipv6.rt6_stats->fib_rt_entries--;
 	net->ipv6.rt6_stats->fib_discarded_routes++;
@@ -1122,14 +1122,14 @@ static void fib6_del_route(struct fib6_node *fn, struct rt6_info **rtp,
 	FOR_WALKERS(w) {
 		if (w->state == FWS_C && w->leaf == rt) {
 			RT6_TRACE("walker %p adjusted by delroute\n", w);
-			w->leaf = rt->u.dst.rt6_next;
+			w->leaf = rt->dst.rt6_next;
 			if (w->leaf == NULL)
 				w->state = FWS_U;
 		}
 	}
 	read_unlock(&fib6_walker_lock);
 
-	rt->u.dst.rt6_next = NULL;
+	rt->dst.rt6_next = NULL;
 
 	/* If it was last route, expunge its radix tree node */
 	if (fn->leaf == NULL) {
@@ -1168,7 +1168,7 @@ int fib6_del(struct rt6_info *rt, struct nl_info *info)
 	struct rt6_info **rtp;
 
 #if RT6_DEBUG >= 2
-	if (rt->u.dst.obsolete>0) {
+	if (rt->dst.obsolete>0) {
 		WARN_ON(fn != NULL);
 		return -ENOENT;
 	}
@@ -1195,7 +1195,7 @@ int fib6_del(struct rt6_info *rt, struct nl_info *info)
 	 *	Walk the leaf entries looking for ourself
 	 */
 
-	for (rtp = &fn->leaf; *rtp; rtp = &(*rtp)->u.dst.rt6_next) {
+	for (rtp = &fn->leaf; *rtp; rtp = &(*rtp)->dst.rt6_next) {
 		if (*rtp == rt) {
 			fib6_del_route(fn, rtp, info);
 			return 0;
@@ -1334,7 +1334,7 @@ static int fib6_clean_node(struct fib6_walker_t *w)
 		.nl_net = c->net,
 	};
 
-	for (rt = w->leaf; rt; rt = rt->u.dst.rt6_next) {
+	for (rt = w->leaf; rt; rt = rt->dst.rt6_next) {
 		res = c->func(rt, c->arg);
 		if (res < 0) {
 			w->leaf = rt;
@@ -1448,8 +1448,8 @@ static int fib6_age(struct rt6_info *rt, void *arg)
 		}
 		gc_args.more++;
 	} else if (rt->rt6i_flags & RTF_CACHE) {
-		if (atomic_read(&rt->u.dst.__refcnt) == 0 &&
-		    time_after_eq(now, rt->u.dst.lastuse + gc_args.timeout)) {
+		if (atomic_read(&rt->dst.__refcnt) == 0 &&
+		    time_after_eq(now, rt->dst.lastuse + gc_args.timeout)) {
 			RT6_TRACE("aging clone %p\n", rt);
 			return -1;
 		} else if ((rt->rt6i_flags & RTF_GATEWAY) &&
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 89425af0684..d40b330c0ee 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -698,7 +698,7 @@ static int ip6_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *))
 		ipv6_hdr(skb)->payload_len = htons(first_len -
 						   sizeof(struct ipv6hdr));
 
-		dst_hold(&rt->u.dst);
+		dst_hold(&rt->dst);
 
 		for (;;) {
 			/* Prepare header of the next frame,
@@ -726,7 +726,7 @@ static int ip6_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *))
 
 			err = output(skb);
 			if(!err)
-				IP6_INC_STATS(net, ip6_dst_idev(&rt->u.dst),
+				IP6_INC_STATS(net, ip6_dst_idev(&rt->dst),
 					      IPSTATS_MIB_FRAGCREATES);
 
 			if (err || !frag)
@@ -740,9 +740,9 @@ static int ip6_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *))
 		kfree(tmp_hdr);
 
 		if (err == 0) {
-			IP6_INC_STATS(net, ip6_dst_idev(&rt->u.dst),
+			IP6_INC_STATS(net, ip6_dst_idev(&rt->dst),
 				      IPSTATS_MIB_FRAGOKS);
-			dst_release(&rt->u.dst);
+			dst_release(&rt->dst);
 			return 0;
 		}
 
@@ -752,9 +752,9 @@ static int ip6_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *))
 			frag = skb;
 		}
 
-		IP6_INC_STATS(net, ip6_dst_idev(&rt->u.dst),
+		IP6_INC_STATS(net, ip6_dst_idev(&rt->dst),
 			      IPSTATS_MIB_FRAGFAILS);
-		dst_release(&rt->u.dst);
+		dst_release(&rt->dst);
 		return err;
 	}
 
@@ -785,7 +785,7 @@ slow_path:
 		 *	Allocate buffer.
 		 */
 
-		if ((frag = alloc_skb(len+hlen+sizeof(struct frag_hdr)+LL_ALLOCATED_SPACE(rt->u.dst.dev), GFP_ATOMIC)) == NULL) {
+		if ((frag = alloc_skb(len+hlen+sizeof(struct frag_hdr)+LL_ALLOCATED_SPACE(rt->dst.dev), GFP_ATOMIC)) == NULL) {
 			NETDEBUG(KERN_INFO "IPv6: frag: no memory for new fragment!\n");
 			IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)),
 				      IPSTATS_MIB_FRAGFAILS);
@@ -798,7 +798,7 @@ slow_path:
 		 */
 
 		ip6_copy_metadata(frag, skb);
-		skb_reserve(frag, LL_RESERVED_SPACE(rt->u.dst.dev));
+		skb_reserve(frag, LL_RESERVED_SPACE(rt->dst.dev));
 		skb_put(frag, len + hlen + sizeof(struct frag_hdr));
 		skb_reset_network_header(frag);
 		fh = (struct frag_hdr *)(skb_network_header(frag) + hlen);
@@ -1156,24 +1156,24 @@ int ip6_append_data(struct sock *sk, int getfrag(void *from, char *to,
 
 			/* need source address above miyazawa*/
 		}
-		dst_hold(&rt->u.dst);
-		inet->cork.dst = &rt->u.dst;
+		dst_hold(&rt->dst);
+		inet->cork.dst = &rt->dst;
 		inet->cork.fl = *fl;
 		np->cork.hop_limit = hlimit;
 		np->cork.tclass = tclass;
 		mtu = np->pmtudisc == IPV6_PMTUDISC_PROBE ?
-		      rt->u.dst.dev->mtu : dst_mtu(rt->u.dst.path);
+		      rt->dst.dev->mtu : dst_mtu(rt->dst.path);
 		if (np->frag_size < mtu) {
 			if (np->frag_size)
 				mtu = np->frag_size;
 		}
 		inet->cork.fragsize = mtu;
-		if (dst_allfrag(rt->u.dst.path))
+		if (dst_allfrag(rt->dst.path))
 			inet->cork.flags |= IPCORK_ALLFRAG;
 		inet->cork.length = 0;
 		sk->sk_sndmsg_page = NULL;
 		sk->sk_sndmsg_off = 0;
-		exthdrlen = rt->u.dst.header_len + (opt ? opt->opt_flen : 0) -
+		exthdrlen = rt->dst.header_len + (opt ? opt->opt_flen : 0) -
 			    rt->rt6i_nfheader_len;
 		length += exthdrlen;
 		transhdrlen += exthdrlen;
@@ -1186,7 +1186,7 @@ int ip6_append_data(struct sock *sk, int getfrag(void *from, char *to,
 		mtu = inet->cork.fragsize;
 	}
 
-	hh_len = LL_RESERVED_SPACE(rt->u.dst.dev);
+	hh_len = LL_RESERVED_SPACE(rt->dst.dev);
 
 	fragheaderlen = sizeof(struct ipv6hdr) + rt->rt6i_nfheader_len +
 			(opt ? opt->opt_nflen : 0);
@@ -1224,7 +1224,7 @@ int ip6_append_data(struct sock *sk, int getfrag(void *from, char *to,
 		}
 
 		if (proto == IPPROTO_UDP &&
-		    (rt->u.dst.dev->features & NETIF_F_UFO)) {
+		    (rt->dst.dev->features & NETIF_F_UFO)) {
 
 			err = ip6_ufo_append_data(sk, getfrag, from, length,
 						  hh_len, fragheaderlen,
@@ -1270,7 +1270,7 @@ alloc_new_skb:
 
 			fraglen = datalen + fragheaderlen;
 			if ((flags & MSG_MORE) &&
-			    !(rt->u.dst.dev->features&NETIF_F_SG))
+			    !(rt->dst.dev->features&NETIF_F_SG))
 				alloclen = mtu;
 			else
 				alloclen = datalen + fragheaderlen;
@@ -1281,7 +1281,7 @@ alloc_new_skb:
 			 * because we have no idea if we're the last one.
 			 */
 			if (datalen == length + fraggap)
-				alloclen += rt->u.dst.trailer_len;
+				alloclen += rt->dst.trailer_len;
 
 			/*
 			 * We just reserve space for fragment header.
@@ -1358,7 +1358,7 @@ alloc_new_skb:
 		if (copy > length)
 			copy = length;
 
-		if (!(rt->u.dst.dev->features&NETIF_F_SG)) {
+		if (!(rt->dst.dev->features&NETIF_F_SG)) {
 			unsigned int off;
 
 			off = skb->len;
@@ -1503,7 +1503,7 @@ int ip6_push_pending_frames(struct sock *sk)
 	skb->priority = sk->sk_priority;
 	skb->mark = sk->sk_mark;
 
-	skb_dst_set(skb, dst_clone(&rt->u.dst));
+	skb_dst_set(skb, dst_clone(&rt->dst));
 	IP6_UPD_PO_STATS(net, rt->rt6i_idev, IPSTATS_MIB_OUT, skb->len);
 	if (proto == IPPROTO_ICMPV6) {
 		struct inet6_dev *idev = ip6_dst_idev(skb_dst(skb));
diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
index 8f39893d808..0fd027f3f47 100644
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -552,7 +552,7 @@ ip4ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
 	if (ip_route_output_key(dev_net(skb->dev), &rt, &fl))
 		goto out;
 
-	skb2->dev = rt->u.dst.dev;
+	skb2->dev = rt->dst.dev;
 
 	/* route "incoming" packet */
 	if (rt->rt_flags & RTCF_LOCAL) {
@@ -562,7 +562,7 @@ ip4ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
 		fl.fl4_src = eiph->saddr;
 		fl.fl4_tos = eiph->tos;
 		if (ip_route_output_key(dev_net(skb->dev), &rt, &fl) ||
-		    rt->u.dst.dev->type != ARPHRD_TUNNEL) {
+		    rt->dst.dev->type != ARPHRD_TUNNEL) {
 			ip_rt_put(rt);
 			goto out;
 		}
@@ -626,7 +626,7 @@ ip6ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
 		icmpv6_send(skb2, rel_type, rel_code, rel_info);
 
 		if (rt)
-			dst_release(&rt->u.dst);
+			dst_release(&rt->dst);
 
 		kfree_skb(skb2);
 	}
@@ -1135,7 +1135,7 @@ static void ip6_tnl_link_config(struct ip6_tnl *t)
 			if (dev->mtu < IPV6_MIN_MTU)
 				dev->mtu = IPV6_MIN_MTU;
 		}
-		dst_release(&rt->u.dst);
+		dst_release(&rt->dst);
 	}
 }
 
diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
index 073071f2b75..66078dad7fe 100644
--- a/net/ipv6/ip6mr.c
+++ b/net/ipv6/ip6mr.c
@@ -120,7 +120,7 @@ static void mroute_clean_tables(struct mr6_table *mrt);
 static void ipmr_expire_process(unsigned long arg);
 
 #ifdef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES
-#define ip6mr_for_each_table(mrt, met) \
+#define ip6mr_for_each_table(mrt, net) \
 	list_for_each_entry_rcu(mrt, &net->ipv6.mr6_tables, list)
 
 static struct mr6_table *ip6mr_get_table(struct net *net, u32 id)
@@ -254,8 +254,10 @@ static void __net_exit ip6mr_rules_exit(struct net *net)
 {
 	struct mr6_table *mrt, *next;
 
-	list_for_each_entry_safe(mrt, next, &net->ipv6.mr6_tables, list)
+	list_for_each_entry_safe(mrt, next, &net->ipv6.mr6_tables, list) {
+		list_del(&mrt->list);
 		ip6mr_free_table(mrt);
+	}
 	fib_rules_unregister(net->ipv6.mr6_rules_ops);
 }
 #else
diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c
index 59f1881968c..d1444b95ad7 100644
--- a/net/ipv6/mcast.c
+++ b/net/ipv6/mcast.c
@@ -152,18 +152,19 @@ int ipv6_sock_mc_join(struct sock *sk, int ifindex, const struct in6_addr *addr)
 	mc_lst->next = NULL;
 	ipv6_addr_copy(&mc_lst->addr, addr);
 
+	rcu_read_lock();
 	if (ifindex == 0) {
 		struct rt6_info *rt;
 		rt = rt6_lookup(net, addr, NULL, 0, 0);
 		if (rt) {
 			dev = rt->rt6i_dev;
-			dev_hold(dev);
-			dst_release(&rt->u.dst);
+			dst_release(&rt->dst);
 		}
 	} else
-		dev = dev_get_by_index(net, ifindex);
+		dev = dev_get_by_index_rcu(net, ifindex);
 
 	if (dev == NULL) {
+		rcu_read_unlock();
 		sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
 		return -ENODEV;
 	}
@@ -180,8 +181,8 @@ int ipv6_sock_mc_join(struct sock *sk, int ifindex, const struct in6_addr *addr)
 	err = ipv6_dev_mc_inc(dev, addr);
 
 	if (err) {
+		rcu_read_unlock();
 		sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
-		dev_put(dev);
 		return err;
 	}
 
@@ -190,7 +191,7 @@ int ipv6_sock_mc_join(struct sock *sk, int ifindex, const struct in6_addr *addr)
 	np->ipv6_mc_list = mc_lst;
 	write_unlock_bh(&ipv6_sk_mc_lock);
 
-	dev_put(dev);
+	rcu_read_unlock();
 
 	return 0;
 }
@@ -213,18 +214,17 @@ int ipv6_sock_mc_drop(struct sock *sk, int ifindex, const struct in6_addr *addr)
 			*lnk = mc_lst->next;
 			write_unlock_bh(&ipv6_sk_mc_lock);
 
-			dev = dev_get_by_index(net, mc_lst->ifindex);
+			rcu_read_lock();
+			dev = dev_get_by_index_rcu(net, mc_lst->ifindex);
 			if (dev != NULL) {
-				struct inet6_dev *idev = in6_dev_get(dev);
+				struct inet6_dev *idev = __in6_dev_get(dev);
 
 				(void) ip6_mc_leave_src(sk, mc_lst, idev);
-				if (idev) {
+				if (idev)
 					__ipv6_dev_mc_dec(idev, &mc_lst->addr);
-					in6_dev_put(idev);
-				}
-				dev_put(dev);
 			} else
 				(void) ip6_mc_leave_src(sk, mc_lst, NULL);
+			rcu_read_unlock();
 			sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
 			return 0;
 		}
@@ -234,43 +234,36 @@ int ipv6_sock_mc_drop(struct sock *sk, int ifindex, const struct in6_addr *addr)
 	return -EADDRNOTAVAIL;
 }
 
-static struct inet6_dev *ip6_mc_find_dev(struct net *net,
-					 struct in6_addr *group,
-					 int ifindex)
+/* called with rcu_read_lock() */
+static struct inet6_dev *ip6_mc_find_dev_rcu(struct net *net,
+					     struct in6_addr *group,
+					     int ifindex)
 {
 	struct net_device *dev = NULL;
 	struct inet6_dev *idev = NULL;
 
 	if (ifindex == 0) {
-		struct rt6_info *rt;
+		struct rt6_info *rt = rt6_lookup(net, group, NULL, 0, 0);
 
-		rt = rt6_lookup(net, group, NULL, 0, 0);
 		if (rt) {
 			dev = rt->rt6i_dev;
 			dev_hold(dev);
-			dst_release(&rt->u.dst);
+			dst_release(&rt->dst);
 		}
 	} else
-		dev = dev_get_by_index(net, ifindex);
+		dev = dev_get_by_index_rcu(net, ifindex);
 
 	if (!dev)
-		goto nodev;
-	idev = in6_dev_get(dev);
+		return NULL;
+	idev = __in6_dev_get(dev);
 	if (!idev)
-		goto release;
+		return NULL;;
 	read_lock_bh(&idev->lock);
-	if (idev->dead)
-		goto unlock_release;
-
+	if (idev->dead) {
+		read_unlock_bh(&idev->lock);
+		return NULL;
+	}
 	return idev;
-
-unlock_release:
-	read_unlock_bh(&idev->lock);
-	in6_dev_put(idev);
-release:
-	dev_put(dev);
-nodev:
-	return NULL;
 }
 
 void ipv6_sock_mc_close(struct sock *sk)
@@ -286,19 +279,17 @@ void ipv6_sock_mc_close(struct sock *sk)
 		np->ipv6_mc_list = mc_lst->next;
 		write_unlock_bh(&ipv6_sk_mc_lock);
 
-		dev = dev_get_by_index(net, mc_lst->ifindex);
+		rcu_read_lock();
+		dev = dev_get_by_index_rcu(net, mc_lst->ifindex);
 		if (dev) {
-			struct inet6_dev *idev = in6_dev_get(dev);
+			struct inet6_dev *idev = __in6_dev_get(dev);
 
 			(void) ip6_mc_leave_src(sk, mc_lst, idev);
-			if (idev) {
+			if (idev)
 				__ipv6_dev_mc_dec(idev, &mc_lst->addr);
-				in6_dev_put(idev);
-			}
-			dev_put(dev);
 		} else
 			(void) ip6_mc_leave_src(sk, mc_lst, NULL);
-
+		rcu_read_unlock();
 		sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
 
 		write_lock_bh(&ipv6_sk_mc_lock);
@@ -327,14 +318,17 @@ int ip6_mc_source(int add, int omode, struct sock *sk,
 	if (!ipv6_addr_is_multicast(group))
 		return -EINVAL;
 
-	idev = ip6_mc_find_dev(net, group, pgsr->gsr_interface);
-	if (!idev)
+	rcu_read_lock();
+	idev = ip6_mc_find_dev_rcu(net, group, pgsr->gsr_interface);
+	if (!idev) {
+		rcu_read_unlock();
 		return -ENODEV;
+	}
 	dev = idev->dev;
 
 	err = -EADDRNOTAVAIL;
 
-	read_lock_bh(&ipv6_sk_mc_lock);
+	read_lock(&ipv6_sk_mc_lock);
 	for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) {
 		if (pgsr->gsr_interface && pmc->ifindex != pgsr->gsr_interface)
 			continue;
@@ -358,7 +352,7 @@ int ip6_mc_source(int add, int omode, struct sock *sk,
 		pmc->sfmode = omode;
 	}
 
-	write_lock_bh(&pmc->sflock);
+	write_lock(&pmc->sflock);
 	pmclocked = 1;
 
 	psl = pmc->sflist;
@@ -433,11 +427,10 @@ int ip6_mc_source(int add, int omode, struct sock *sk,
 	ip6_mc_add_src(idev, group, omode, 1, source, 1);
 done:
 	if (pmclocked)
-		write_unlock_bh(&pmc->sflock);
-	read_unlock_bh(&ipv6_sk_mc_lock);
+		write_unlock(&pmc->sflock);
+	read_unlock(&ipv6_sk_mc_lock);
 	read_unlock_bh(&idev->lock);
-	in6_dev_put(idev);
-	dev_put(dev);
+	rcu_read_unlock();
 	if (leavegroup)
 		return ipv6_sock_mc_drop(sk, pgsr->gsr_interface, group);
 	return err;
@@ -463,14 +456,17 @@ int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf)
 	    gsf->gf_fmode != MCAST_EXCLUDE)
 		return -EINVAL;
 
-	idev = ip6_mc_find_dev(net, group, gsf->gf_interface);
+	rcu_read_lock();
+	idev = ip6_mc_find_dev_rcu(net, group, gsf->gf_interface);
 
-	if (!idev)
+	if (!idev) {
+		rcu_read_unlock();
 		return -ENODEV;
+	}
 	dev = idev->dev;
 
 	err = 0;
-	read_lock_bh(&ipv6_sk_mc_lock);
+	read_lock(&ipv6_sk_mc_lock);
 
 	if (gsf->gf_fmode == MCAST_INCLUDE && gsf->gf_numsrc == 0) {
 		leavegroup = 1;
@@ -512,7 +508,7 @@ int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf)
 		(void) ip6_mc_add_src(idev, group, gsf->gf_fmode, 0, NULL, 0);
 	}
 
-	write_lock_bh(&pmc->sflock);
+	write_lock(&pmc->sflock);
 	psl = pmc->sflist;
 	if (psl) {
 		(void) ip6_mc_del_src(idev, group, pmc->sfmode,
@@ -522,13 +518,12 @@ int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf)
 		(void) ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0);
 	pmc->sflist = newpsl;
 	pmc->sfmode = gsf->gf_fmode;
-	write_unlock_bh(&pmc->sflock);
+	write_unlock(&pmc->sflock);
 	err = 0;
 done:
-	read_unlock_bh(&ipv6_sk_mc_lock);
+	read_unlock(&ipv6_sk_mc_lock);
 	read_unlock_bh(&idev->lock);
-	in6_dev_put(idev);
-	dev_put(dev);
+	rcu_read_unlock();
 	if (leavegroup)
 		err = ipv6_sock_mc_drop(sk, gsf->gf_interface, group);
 	return err;
@@ -551,11 +546,13 @@ int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
 	if (!ipv6_addr_is_multicast(group))
 		return -EINVAL;
 
-	idev = ip6_mc_find_dev(net, group, gsf->gf_interface);
+	rcu_read_lock();
+	idev = ip6_mc_find_dev_rcu(net, group, gsf->gf_interface);
 
-	if (!idev)
+	if (!idev) {
+		rcu_read_unlock();
 		return -ENODEV;
-
+	}
 	dev = idev->dev;
 
 	err = -EADDRNOTAVAIL;
@@ -577,8 +574,7 @@ int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
 	psl = pmc->sflist;
 	count = psl ? psl->sl_count : 0;
 	read_unlock_bh(&idev->lock);
-	in6_dev_put(idev);
-	dev_put(dev);
+	rcu_read_unlock();
 
 	copycount = count < gsf->gf_numsrc ? count : gsf->gf_numsrc;
 	gsf->gf_numsrc = count;
@@ -604,8 +600,7 @@ int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
 	return 0;
 done:
 	read_unlock_bh(&idev->lock);
-	in6_dev_put(idev);
-	dev_put(dev);
+	rcu_read_unlock();
 	return err;
 }
 
@@ -822,6 +817,7 @@ int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr)
 	struct ifmcaddr6 *mc;
 	struct inet6_dev *idev;
 
+	/* we need to take a reference on idev */
 	idev = in6_dev_get(dev);
 
 	if (idev == NULL)
@@ -860,7 +856,7 @@ int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr)
 	setup_timer(&mc->mca_timer, igmp6_timer_handler, (unsigned long)mc);
 
 	ipv6_addr_copy(&mc->mca_addr, addr);
-	mc->idev = idev;
+	mc->idev = idev; /* (reference taken) */
 	mc->mca_users = 1;
 	/* mca_stamp should be updated upon changes */
 	mc->mca_cstamp = mc->mca_tstamp = jiffies;
@@ -915,16 +911,18 @@ int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr)
 
 int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr)
 {
-	struct inet6_dev *idev = in6_dev_get(dev);
+	struct inet6_dev *idev;
 	int err;
 
-	if (!idev)
-		return -ENODEV;
-
-	err = __ipv6_dev_mc_dec(idev, addr);
+	rcu_read_lock();
 
-	in6_dev_put(idev);
+	idev = __in6_dev_get(dev);
+	if (!idev)
+		err = -ENODEV;
+	else
+		err = __ipv6_dev_mc_dec(idev, addr);
 
+	rcu_read_unlock();
 	return err;
 }
 
@@ -965,7 +963,8 @@ int ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group,
 	struct ifmcaddr6 *mc;
 	int rv = 0;
 
-	idev = in6_dev_get(dev);
+	rcu_read_lock();
+	idev = __in6_dev_get(dev);
 	if (idev) {
 		read_lock_bh(&idev->lock);
 		for (mc = idev->mc_list; mc; mc=mc->next) {
@@ -992,8 +991,8 @@ int ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group,
 				rv = 1; /* don't filter unspecified source */
 		}
 		read_unlock_bh(&idev->lock);
-		in6_dev_put(idev);
 	}
+	rcu_read_unlock();
 	return rv;
 }
 
@@ -1104,6 +1103,7 @@ static int mld_marksources(struct ifmcaddr6 *pmc, int nsrcs,
 	return 1;
 }
 
+/* called with rcu_read_lock() */
 int igmp6_event_query(struct sk_buff *skb)
 {
 	struct mld2_query *mlh2 = NULL;
@@ -1127,7 +1127,7 @@ int igmp6_event_query(struct sk_buff *skb)
 	if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL))
 		return -EINVAL;
 
-	idev = in6_dev_get(skb->dev);
+	idev = __in6_dev_get(skb->dev);
 
 	if (idev == NULL)
 		return 0;
@@ -1137,10 +1137,8 @@ int igmp6_event_query(struct sk_buff *skb)
 	group_type = ipv6_addr_type(group);
 
 	if (group_type != IPV6_ADDR_ANY &&
-	    !(group_type&IPV6_ADDR_MULTICAST)) {
-		in6_dev_put(idev);
+	    !(group_type&IPV6_ADDR_MULTICAST))
 		return -EINVAL;
-	}
 
 	if (len == 24) {
 		int switchback;
@@ -1161,10 +1159,9 @@ int igmp6_event_query(struct sk_buff *skb)
 	} else if (len >= 28) {
 		int srcs_offset = sizeof(struct mld2_query) -
 				  sizeof(struct icmp6hdr);
-		if (!pskb_may_pull(skb, srcs_offset)) {
-			in6_dev_put(idev);
+		if (!pskb_may_pull(skb, srcs_offset))
 			return -EINVAL;
-		}
+
 		mlh2 = (struct mld2_query *)skb_transport_header(skb);
 		max_delay = (MLDV2_MRC(ntohs(mlh2->mld2q_mrc))*HZ)/1000;
 		if (!max_delay)
@@ -1173,28 +1170,23 @@ int igmp6_event_query(struct sk_buff *skb)
 		if (mlh2->mld2q_qrv)
 			idev->mc_qrv = mlh2->mld2q_qrv;
 		if (group_type == IPV6_ADDR_ANY) { /* general query */
-			if (mlh2->mld2q_nsrcs) {
-				in6_dev_put(idev);
+			if (mlh2->mld2q_nsrcs)
 				return -EINVAL; /* no sources allowed */
-			}
+
 			mld_gq_start_timer(idev);
-			in6_dev_put(idev);
 			return 0;
 		}
 		/* mark sources to include, if group & source-specific */
 		if (mlh2->mld2q_nsrcs != 0) {
 			if (!pskb_may_pull(skb, srcs_offset +
-			    ntohs(mlh2->mld2q_nsrcs) * sizeof(struct in6_addr))) {
-				in6_dev_put(idev);
+			    ntohs(mlh2->mld2q_nsrcs) * sizeof(struct in6_addr)))
 				return -EINVAL;
-			}
+
 			mlh2 = (struct mld2_query *)skb_transport_header(skb);
 			mark = 1;
 		}
-	} else {
-		in6_dev_put(idev);
+	} else
 		return -EINVAL;
-	}
 
 	read_lock_bh(&idev->lock);
 	if (group_type == IPV6_ADDR_ANY) {
@@ -1227,12 +1219,11 @@ int igmp6_event_query(struct sk_buff *skb)
 		}
 	}
 	read_unlock_bh(&idev->lock);
-	in6_dev_put(idev);
 
 	return 0;
 }
 
-
+/* called with rcu_read_lock() */
 int igmp6_event_report(struct sk_buff *skb)
 {
 	struct ifmcaddr6 *ma;
@@ -1260,7 +1251,7 @@ int igmp6_event_report(struct sk_buff *skb)
 	    !(addr_type&IPV6_ADDR_LINKLOCAL))
 		return -EINVAL;
 
-	idev = in6_dev_get(skb->dev);
+	idev = __in6_dev_get(skb->dev);
 	if (idev == NULL)
 		return -ENODEV;
 
@@ -1280,7 +1271,6 @@ int igmp6_event_report(struct sk_buff *skb)
 		}
 	}
 	read_unlock_bh(&idev->lock);
-	in6_dev_put(idev);
 	return 0;
 }
 
@@ -1356,7 +1346,10 @@ static struct sk_buff *mld_newpack(struct net_device *dev, int size)
 		     IPV6_TLV_PADN, 0 };
 
 	/* we assume size > sizeof(ra) here */
-	skb = sock_alloc_send_skb(sk, size + LL_ALLOCATED_SPACE(dev), 1, &err);
+	size += LL_ALLOCATED_SPACE(dev);
+	/* limit our allocations to order-0 page */
+	size = min_t(int, size, SKB_MAX_ORDER(0, 0));
+	skb = sock_alloc_send_skb(sk, size, 1, &err);
 
 	if (!skb)
 		return NULL;
@@ -1393,12 +1386,14 @@ static void mld_sendpack(struct sk_buff *skb)
 	struct mld2_report *pmr =
 			      (struct mld2_report *)skb_transport_header(skb);
 	int payload_len, mldlen;
-	struct inet6_dev *idev = in6_dev_get(skb->dev);
+	struct inet6_dev *idev;
 	struct net *net = dev_net(skb->dev);
 	int err;
 	struct flowi fl;
 	struct dst_entry *dst;
 
+	rcu_read_lock();
+	idev = __in6_dev_get(skb->dev);
 	IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUT, skb->len);
 
 	payload_len = (skb->tail - skb->network_header) - sizeof(*pip6);
@@ -1438,8 +1433,7 @@ out:
 	} else
 		IP6_INC_STATS_BH(net, idev, IPSTATS_MIB_OUTDISCARDS);
 
-	if (likely(idev != NULL))
-		in6_dev_put(idev);
+	rcu_read_unlock();
 	return;
 
 err_out:
@@ -1776,7 +1770,8 @@ static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type)
 					 IPPROTO_ICMPV6,
 					 csum_partial(hdr, len, 0));
 
-	idev = in6_dev_get(skb->dev);
+	rcu_read_lock();
+	idev = __in6_dev_get(skb->dev);
 
 	dst = icmp6_dst_alloc(skb->dev, NULL, &ipv6_hdr(skb)->daddr);
 	if (!dst) {
@@ -1803,8 +1798,7 @@ out:
 	} else
 		IP6_INC_STATS(net, idev, IPSTATS_MIB_OUTDISCARDS);
 
-	if (likely(idev != NULL))
-		in6_dev_put(idev);
+	rcu_read_unlock();
 	return;
 
 err_out:
@@ -1995,8 +1989,7 @@ static int sf_setstate(struct ifmcaddr6 *pmc)
 				    &psf->sf_addr))
 					break;
 			if (!dpsf) {
-				dpsf = (struct ip6_sf_list *)
-					kmalloc(sizeof(*dpsf), GFP_ATOMIC);
+				dpsf = kmalloc(sizeof(*dpsf), GFP_ATOMIC);
 				if (!dpsf)
 					continue;
 				*dpsf = *psf;
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index 0abdc242ddb..1fc46fc60ef 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -1229,7 +1229,7 @@ static void ndisc_router_discovery(struct sk_buff *skb)
 			ND_PRINTK0(KERN_ERR
 				   "ICMPv6 RA: %s() got default router without neighbour.\n",
 				   __func__);
-			dst_release(&rt->u.dst);
+			dst_release(&rt->dst);
 			in6_dev_put(in6_dev);
 			return;
 		}
@@ -1244,7 +1244,7 @@ static void ndisc_router_discovery(struct sk_buff *skb)
 	if (ra_msg->icmph.icmp6_hop_limit) {
 		in6_dev->cnf.hop_limit = ra_msg->icmph.icmp6_hop_limit;
 		if (rt)
-			rt->u.dst.metrics[RTAX_HOPLIMIT-1] = ra_msg->icmph.icmp6_hop_limit;
+			rt->dst.metrics[RTAX_HOPLIMIT-1] = ra_msg->icmph.icmp6_hop_limit;
 	}
 
 skip_defrtr:
@@ -1363,7 +1363,7 @@ skip_linkparms:
 			in6_dev->cnf.mtu6 = mtu;
 
 			if (rt)
-				rt->u.dst.metrics[RTAX_MTU-1] = mtu;
+				rt->dst.metrics[RTAX_MTU-1] = mtu;
 
 			rt6_mtu_change(skb->dev, mtu);
 		}
@@ -1384,7 +1384,7 @@ skip_linkparms:
 	}
 out:
 	if (rt)
-		dst_release(&rt->u.dst);
+		dst_release(&rt->dst);
 	else if (neigh)
 		neigh_release(neigh);
 	in6_dev_put(in6_dev);
diff --git a/net/ipv6/netfilter/ip6_tables.c b/net/ipv6/netfilter/ip6_tables.c
index 82945ef6c9f..dc41d6d3c6c 100644
--- a/net/ipv6/netfilter/ip6_tables.c
+++ b/net/ipv6/netfilter/ip6_tables.c
@@ -363,7 +363,7 @@ ip6t_do_table(struct sk_buff *skb,
 	cpu        = smp_processor_id();
 	table_base = private->entries[cpu];
 	jumpstack  = (struct ip6t_entry **)private->jumpstack[cpu];
-	stackptr   = &private->stackptr[cpu];
+	stackptr   = per_cpu_ptr(private->stackptr, cpu);
 	origptr    = *stackptr;
 
 	e = get_entry(table_base, private->hook_entry[hook]);
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index 4a4dcbe4f8b..e677937a07f 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -602,31 +602,33 @@ out:
 }
 
 static int rawv6_send_hdrinc(struct sock *sk, void *from, int length,
-			struct flowi *fl, struct rt6_info *rt,
+			struct flowi *fl, struct dst_entry **dstp,
 			unsigned int flags)
 {
 	struct ipv6_pinfo *np = inet6_sk(sk);
 	struct ipv6hdr *iph;
 	struct sk_buff *skb;
 	int err;
+	struct rt6_info *rt = (struct rt6_info *)*dstp;
 
-	if (length > rt->u.dst.dev->mtu) {
-		ipv6_local_error(sk, EMSGSIZE, fl, rt->u.dst.dev->mtu);
+	if (length > rt->dst.dev->mtu) {
+		ipv6_local_error(sk, EMSGSIZE, fl, rt->dst.dev->mtu);
 		return -EMSGSIZE;
 	}
 	if (flags&MSG_PROBE)
 		goto out;
 
 	skb = sock_alloc_send_skb(sk,
-				  length + LL_ALLOCATED_SPACE(rt->u.dst.dev) + 15,
+				  length + LL_ALLOCATED_SPACE(rt->dst.dev) + 15,
 				  flags & MSG_DONTWAIT, &err);
 	if (skb == NULL)
 		goto error;
-	skb_reserve(skb, LL_RESERVED_SPACE(rt->u.dst.dev));
+	skb_reserve(skb, LL_RESERVED_SPACE(rt->dst.dev));
 
 	skb->priority = sk->sk_priority;
 	skb->mark = sk->sk_mark;
-	skb_dst_set(skb, dst_clone(&rt->u.dst));
+	skb_dst_set(skb, &rt->dst);
+	*dstp = NULL;
 
 	skb_put(skb, length);
 	skb_reset_network_header(skb);
@@ -641,7 +643,7 @@ static int rawv6_send_hdrinc(struct sock *sk, void *from, int length,
 
 	IP6_UPD_PO_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUT, skb->len);
 	err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL,
-		      rt->u.dst.dev, dst_output);
+		      rt->dst.dev, dst_output);
 	if (err > 0)
 		err = net_xmit_errno(err);
 	if (err)
@@ -725,7 +727,7 @@ static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
 {
 	struct ipv6_txoptions opt_space;
 	struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name;
-	struct in6_addr *daddr, *final_p = NULL, final;
+	struct in6_addr *daddr, *final_p, final;
 	struct inet_sock *inet = inet_sk(sk);
 	struct ipv6_pinfo *np = inet6_sk(sk);
 	struct raw6_sock *rp = raw6_sk(sk);
@@ -847,13 +849,7 @@ static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
 	if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr))
 		ipv6_addr_copy(&fl.fl6_src, &np->saddr);
 
-	/* merge ip6_build_xmit from ip6_output */
-	if (opt && opt->srcrt) {
-		struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt;
-		ipv6_addr_copy(&final, &fl.fl6_dst);
-		ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
-		final_p = &final;
-	}
+	final_p = fl6_update_dst(&fl, opt, &final);
 
 	if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst))
 		fl.oif = np->mcast_oif;
@@ -892,9 +888,9 @@ static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
 		goto do_confirm;
 
 back_from_confirm:
-	if (inet->hdrincl) {
-		err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl, (struct rt6_info*)dst, msg->msg_flags);
-	} else {
+	if (inet->hdrincl)
+		err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl, &dst, msg->msg_flags);
+	else {
 		lock_sock(sk);
 		err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov,
 			len, 0, hlimit, tclass, opt, &fl, (struct rt6_info*)dst,
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 252d76199c4..8f2d0400cf8 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -126,16 +126,14 @@ static struct dst_ops ip6_dst_blackhole_ops = {
 };
 
 static struct rt6_info ip6_null_entry_template = {
-	.u = {
-		.dst = {
-			.__refcnt	= ATOMIC_INIT(1),
-			.__use		= 1,
-			.obsolete	= -1,
-			.error		= -ENETUNREACH,
-			.metrics	= { [RTAX_HOPLIMIT - 1] = 255, },
-			.input		= ip6_pkt_discard,
-			.output		= ip6_pkt_discard_out,
-		}
+	.dst = {
+		.__refcnt	= ATOMIC_INIT(1),
+		.__use		= 1,
+		.obsolete	= -1,
+		.error		= -ENETUNREACH,
+		.metrics	= { [RTAX_HOPLIMIT - 1] = 255, },
+		.input		= ip6_pkt_discard,
+		.output		= ip6_pkt_discard_out,
 	},
 	.rt6i_flags	= (RTF_REJECT | RTF_NONEXTHOP),
 	.rt6i_protocol  = RTPROT_KERNEL,
@@ -149,16 +147,14 @@ static int ip6_pkt_prohibit(struct sk_buff *skb);
 static int ip6_pkt_prohibit_out(struct sk_buff *skb);
 
 static struct rt6_info ip6_prohibit_entry_template = {
-	.u = {
-		.dst = {
-			.__refcnt	= ATOMIC_INIT(1),
-			.__use		= 1,
-			.obsolete	= -1,
-			.error		= -EACCES,
-			.metrics	= { [RTAX_HOPLIMIT - 1] = 255, },
-			.input		= ip6_pkt_prohibit,
-			.output		= ip6_pkt_prohibit_out,
-		}
+	.dst = {
+		.__refcnt	= ATOMIC_INIT(1),
+		.__use		= 1,
+		.obsolete	= -1,
+		.error		= -EACCES,
+		.metrics	= { [RTAX_HOPLIMIT - 1] = 255, },
+		.input		= ip6_pkt_prohibit,
+		.output		= ip6_pkt_prohibit_out,
 	},
 	.rt6i_flags	= (RTF_REJECT | RTF_NONEXTHOP),
 	.rt6i_protocol  = RTPROT_KERNEL,
@@ -167,16 +163,14 @@ static struct rt6_info ip6_prohibit_entry_template = {
 };
 
 static struct rt6_info ip6_blk_hole_entry_template = {
-	.u = {
-		.dst = {
-			.__refcnt	= ATOMIC_INIT(1),
-			.__use		= 1,
-			.obsolete	= -1,
-			.error		= -EINVAL,
-			.metrics	= { [RTAX_HOPLIMIT - 1] = 255, },
-			.input		= dst_discard,
-			.output		= dst_discard,
-		}
+	.dst = {
+		.__refcnt	= ATOMIC_INIT(1),
+		.__use		= 1,
+		.obsolete	= -1,
+		.error		= -EINVAL,
+		.metrics	= { [RTAX_HOPLIMIT - 1] = 255, },
+		.input		= dst_discard,
+		.output		= dst_discard,
 	},
 	.rt6i_flags	= (RTF_REJECT | RTF_NONEXTHOP),
 	.rt6i_protocol  = RTPROT_KERNEL,
@@ -249,7 +243,7 @@ static inline struct rt6_info *rt6_device_match(struct net *net,
 	if (!oif && ipv6_addr_any(saddr))
 		goto out;
 
-	for (sprt = rt; sprt; sprt = sprt->u.dst.rt6_next) {
+	for (sprt = rt; sprt; sprt = sprt->dst.rt6_next) {
 		struct net_device *dev = sprt->rt6i_dev;
 
 		if (oif) {
@@ -407,10 +401,10 @@ static struct rt6_info *find_rr_leaf(struct fib6_node *fn,
 
 	match = NULL;
 	for (rt = rr_head; rt && rt->rt6i_metric == metric;
-	     rt = rt->u.dst.rt6_next)
+	     rt = rt->dst.rt6_next)
 		match = find_match(rt, oif, strict, &mpri, match);
 	for (rt = fn->leaf; rt && rt != rr_head && rt->rt6i_metric == metric;
-	     rt = rt->u.dst.rt6_next)
+	     rt = rt->dst.rt6_next)
 		match = find_match(rt, oif, strict, &mpri, match);
 
 	return match;
@@ -432,7 +426,7 @@ static struct rt6_info *rt6_select(struct fib6_node *fn, int oif, int strict)
 
 	if (!match &&
 	    (strict & RT6_LOOKUP_F_REACHABLE)) {
-		struct rt6_info *next = rt0->u.dst.rt6_next;
+		struct rt6_info *next = rt0->dst.rt6_next;
 
 		/* no entries matched; do round-robin */
 		if (!next || next->rt6i_metric != rt0->rt6i_metric)
@@ -517,7 +511,7 @@ int rt6_route_rcv(struct net_device *dev, u8 *opt, int len,
 			rt->rt6i_expires = jiffies + HZ * lifetime;
 			rt->rt6i_flags |= RTF_EXPIRES;
 		}
-		dst_release(&rt->u.dst);
+		dst_release(&rt->dst);
 	}
 	return 0;
 }
@@ -555,7 +549,7 @@ restart:
 	rt = rt6_device_match(net, rt, &fl->fl6_src, fl->oif, flags);
 	BACKTRACK(net, &fl->fl6_src);
 out:
-	dst_use(&rt->u.dst, jiffies);
+	dst_use(&rt->dst, jiffies);
 	read_unlock_bh(&table->tb6_lock);
 	return rt;
 
@@ -643,7 +637,7 @@ static struct rt6_info *rt6_alloc_cow(struct rt6_info *ort, struct in6_addr *dad
 		ipv6_addr_copy(&rt->rt6i_dst.addr, daddr);
 		rt->rt6i_dst.plen = 128;
 		rt->rt6i_flags |= RTF_CACHE;
-		rt->u.dst.flags |= DST_HOST;
+		rt->dst.flags |= DST_HOST;
 
 #ifdef CONFIG_IPV6_SUBTREES
 		if (rt->rt6i_src.plen && saddr) {
@@ -677,7 +671,7 @@ static struct rt6_info *rt6_alloc_cow(struct rt6_info *ort, struct in6_addr *dad
 			if (net_ratelimit())
 				printk(KERN_WARNING
 				       "Neighbour table overflow.\n");
-			dst_free(&rt->u.dst);
+			dst_free(&rt->dst);
 			return NULL;
 		}
 		rt->rt6i_nexthop = neigh;
@@ -694,7 +688,7 @@ static struct rt6_info *rt6_alloc_clone(struct rt6_info *ort, struct in6_addr *d
 		ipv6_addr_copy(&rt->rt6i_dst.addr, daddr);
 		rt->rt6i_dst.plen = 128;
 		rt->rt6i_flags |= RTF_CACHE;
-		rt->u.dst.flags |= DST_HOST;
+		rt->dst.flags |= DST_HOST;
 		rt->rt6i_nexthop = neigh_clone(ort->rt6i_nexthop);
 	}
 	return rt;
@@ -726,7 +720,7 @@ restart:
 	    rt->rt6i_flags & RTF_CACHE)
 		goto out;
 
-	dst_hold(&rt->u.dst);
+	dst_hold(&rt->dst);
 	read_unlock_bh(&table->tb6_lock);
 
 	if (!rt->rt6i_nexthop && !(rt->rt6i_flags & RTF_NONEXTHOP))
@@ -739,10 +733,10 @@ restart:
 #endif
 	}
 
-	dst_release(&rt->u.dst);
+	dst_release(&rt->dst);
 	rt = nrt ? : net->ipv6.ip6_null_entry;
 
-	dst_hold(&rt->u.dst);
+	dst_hold(&rt->dst);
 	if (nrt) {
 		err = ip6_ins_rt(nrt);
 		if (!err)
@@ -756,7 +750,7 @@ restart:
 	 * Race condition! In the gap, when table->tb6_lock was
 	 * released someone could insert this route.  Relookup.
 	 */
-	dst_release(&rt->u.dst);
+	dst_release(&rt->dst);
 	goto relookup;
 
 out:
@@ -764,11 +758,11 @@ out:
 		reachable = 0;
 		goto restart_2;
 	}
-	dst_hold(&rt->u.dst);
+	dst_hold(&rt->dst);
 	read_unlock_bh(&table->tb6_lock);
 out2:
-	rt->u.dst.lastuse = jiffies;
-	rt->u.dst.__use++;
+	rt->dst.lastuse = jiffies;
+	rt->dst.__use++;
 
 	return rt;
 }
@@ -835,15 +829,15 @@ int ip6_dst_blackhole(struct sock *sk, struct dst_entry **dstp, struct flowi *fl
 	struct dst_entry *new = NULL;
 
 	if (rt) {
-		new = &rt->u.dst;
+		new = &rt->dst;
 
 		atomic_set(&new->__refcnt, 1);
 		new->__use = 1;
 		new->input = dst_discard;
 		new->output = dst_discard;
 
-		memcpy(new->metrics, ort->u.dst.metrics, RTAX_MAX*sizeof(u32));
-		new->dev = ort->u.dst.dev;
+		memcpy(new->metrics, ort->dst.metrics, RTAX_MAX*sizeof(u32));
+		new->dev = ort->dst.dev;
 		if (new->dev)
 			dev_hold(new->dev);
 		rt->rt6i_idev = ort->rt6i_idev;
@@ -912,7 +906,7 @@ static void ip6_link_failure(struct sk_buff *skb)
 	rt = (struct rt6_info *) skb_dst(skb);
 	if (rt) {
 		if (rt->rt6i_flags&RTF_CACHE) {
-			dst_set_expires(&rt->u.dst, 0);
+			dst_set_expires(&rt->dst, 0);
 			rt->rt6i_flags |= RTF_EXPIRES;
 		} else if (rt->rt6i_node && (rt->rt6i_flags & RTF_DEFAULT))
 			rt->rt6i_node->fn_sernum = -1;
@@ -986,14 +980,14 @@ struct dst_entry *icmp6_dst_alloc(struct net_device *dev,
 	rt->rt6i_dev	  = dev;
 	rt->rt6i_idev     = idev;
 	rt->rt6i_nexthop  = neigh;
-	atomic_set(&rt->u.dst.__refcnt, 1);
-	rt->u.dst.metrics[RTAX_HOPLIMIT-1] = 255;
-	rt->u.dst.metrics[RTAX_MTU-1] = ipv6_get_mtu(rt->rt6i_dev);
-	rt->u.dst.metrics[RTAX_ADVMSS-1] = ipv6_advmss(net, dst_mtu(&rt->u.dst));
-	rt->u.dst.output  = ip6_output;
+	atomic_set(&rt->dst.__refcnt, 1);
+	rt->dst.metrics[RTAX_HOPLIMIT-1] = 255;
+	rt->dst.metrics[RTAX_MTU-1] = ipv6_get_mtu(rt->rt6i_dev);
+	rt->dst.metrics[RTAX_ADVMSS-1] = ipv6_advmss(net, dst_mtu(&rt->dst));
+	rt->dst.output  = ip6_output;
 
 #if 0	/* there's no chance to use these for ndisc */
-	rt->u.dst.flags   = ipv6_addr_type(addr) & IPV6_ADDR_UNICAST
+	rt->dst.flags   = ipv6_addr_type(addr) & IPV6_ADDR_UNICAST
 				? DST_HOST
 				: 0;
 	ipv6_addr_copy(&rt->rt6i_dst.addr, addr);
@@ -1001,14 +995,14 @@ struct dst_entry *icmp6_dst_alloc(struct net_device *dev,
 #endif
 
 	spin_lock_bh(&icmp6_dst_lock);
-	rt->u.dst.next = icmp6_dst_gc_list;
-	icmp6_dst_gc_list = &rt->u.dst;
+	rt->dst.next = icmp6_dst_gc_list;
+	icmp6_dst_gc_list = &rt->dst;
 	spin_unlock_bh(&icmp6_dst_lock);
 
 	fib6_force_start_gc(net);
 
 out:
-	return &rt->u.dst;
+	return &rt->dst;
 }
 
 int icmp6_dst_gc(void)
@@ -1090,11 +1084,11 @@ static int ipv6_get_mtu(struct net_device *dev)
 	int mtu = IPV6_MIN_MTU;
 	struct inet6_dev *idev;
 
-	idev = in6_dev_get(dev);
-	if (idev) {
+	rcu_read_lock();
+	idev = __in6_dev_get(dev);
+	if (idev)
 		mtu = idev->cnf.mtu6;
-		in6_dev_put(idev);
-	}
+	rcu_read_unlock();
 	return mtu;
 }
 
@@ -1103,12 +1097,15 @@ int ip6_dst_hoplimit(struct dst_entry *dst)
 	int hoplimit = dst_metric(dst, RTAX_HOPLIMIT);
 	if (hoplimit < 0) {
 		struct net_device *dev = dst->dev;
-		struct inet6_dev *idev = in6_dev_get(dev);
-		if (idev) {
+		struct inet6_dev *idev;
+
+		rcu_read_lock();
+		idev = __in6_dev_get(dev);
+		if (idev)
 			hoplimit = idev->cnf.hop_limit;
-			in6_dev_put(idev);
-		} else
+		else
 			hoplimit = dev_net(dev)->ipv6.devconf_all->hop_limit;
+		rcu_read_unlock();
 	}
 	return hoplimit;
 }
@@ -1159,7 +1156,7 @@ int ip6_route_add(struct fib6_config *cfg)
 		goto out;
 	}
 
-	rt->u.dst.obsolete = -1;
+	rt->dst.obsolete = -1;
 	rt->rt6i_expires = (cfg->fc_flags & RTF_EXPIRES) ?
 				jiffies + clock_t_to_jiffies(cfg->fc_expires) :
 				0;
@@ -1171,16 +1168,16 @@ int ip6_route_add(struct fib6_config *cfg)
 	addr_type = ipv6_addr_type(&cfg->fc_dst);
 
 	if (addr_type & IPV6_ADDR_MULTICAST)
-		rt->u.dst.input = ip6_mc_input;
+		rt->dst.input = ip6_mc_input;
 	else
-		rt->u.dst.input = ip6_forward;
+		rt->dst.input = ip6_forward;
 
-	rt->u.dst.output = ip6_output;
+	rt->dst.output = ip6_output;
 
 	ipv6_addr_prefix(&rt->rt6i_dst.addr, &cfg->fc_dst, cfg->fc_dst_len);
 	rt->rt6i_dst.plen = cfg->fc_dst_len;
 	if (rt->rt6i_dst.plen == 128)
-	       rt->u.dst.flags = DST_HOST;
+	       rt->dst.flags = DST_HOST;
 
 #ifdef CONFIG_IPV6_SUBTREES
 	ipv6_addr_prefix(&rt->rt6i_src.addr, &cfg->fc_src, cfg->fc_src_len);
@@ -1208,9 +1205,9 @@ int ip6_route_add(struct fib6_config *cfg)
 				goto out;
 			}
 		}
-		rt->u.dst.output = ip6_pkt_discard_out;
-		rt->u.dst.input = ip6_pkt_discard;
-		rt->u.dst.error = -ENETUNREACH;
+		rt->dst.output = ip6_pkt_discard_out;
+		rt->dst.input = ip6_pkt_discard;
+		rt->dst.error = -ENETUNREACH;
 		rt->rt6i_flags = RTF_REJECT|RTF_NONEXTHOP;
 		goto install_route;
 	}
@@ -1244,7 +1241,7 @@ int ip6_route_add(struct fib6_config *cfg)
 				goto out;
 			if (dev) {
 				if (dev != grt->rt6i_dev) {
-					dst_release(&grt->u.dst);
+					dst_release(&grt->dst);
 					goto out;
 				}
 			} else {
@@ -1255,7 +1252,7 @@ int ip6_route_add(struct fib6_config *cfg)
 			}
 			if (!(grt->rt6i_flags&RTF_GATEWAY))
 				err = 0;
-			dst_release(&grt->u.dst);
+			dst_release(&grt->dst);
 
 			if (err)
 				goto out;
@@ -1294,18 +1291,18 @@ install_route:
 					goto out;
 				}
 
-				rt->u.dst.metrics[type - 1] = nla_get_u32(nla);
+				rt->dst.metrics[type - 1] = nla_get_u32(nla);
 			}
 		}
 	}
 
-	if (dst_metric(&rt->u.dst, RTAX_HOPLIMIT) == 0)
-		rt->u.dst.metrics[RTAX_HOPLIMIT-1] = -1;
-	if (!dst_mtu(&rt->u.dst))
-		rt->u.dst.metrics[RTAX_MTU-1] = ipv6_get_mtu(dev);
-	if (!dst_metric(&rt->u.dst, RTAX_ADVMSS))
-		rt->u.dst.metrics[RTAX_ADVMSS-1] = ipv6_advmss(net, dst_mtu(&rt->u.dst));
-	rt->u.dst.dev = dev;
+	if (dst_metric(&rt->dst, RTAX_HOPLIMIT) == 0)
+		rt->dst.metrics[RTAX_HOPLIMIT-1] = -1;
+	if (!dst_mtu(&rt->dst))
+		rt->dst.metrics[RTAX_MTU-1] = ipv6_get_mtu(dev);
+	if (!dst_metric(&rt->dst, RTAX_ADVMSS))
+		rt->dst.metrics[RTAX_ADVMSS-1] = ipv6_advmss(net, dst_mtu(&rt->dst));
+	rt->dst.dev = dev;
 	rt->rt6i_idev = idev;
 	rt->rt6i_table = table;
 
@@ -1319,7 +1316,7 @@ out:
 	if (idev)
 		in6_dev_put(idev);
 	if (rt)
-		dst_free(&rt->u.dst);
+		dst_free(&rt->dst);
 	return err;
 }
 
@@ -1336,7 +1333,7 @@ static int __ip6_del_rt(struct rt6_info *rt, struct nl_info *info)
 	write_lock_bh(&table->tb6_lock);
 
 	err = fib6_del(rt, info);
-	dst_release(&rt->u.dst);
+	dst_release(&rt->dst);
 
 	write_unlock_bh(&table->tb6_lock);
 
@@ -1369,7 +1366,7 @@ static int ip6_route_del(struct fib6_config *cfg)
 			 &cfg->fc_src, cfg->fc_src_len);
 
 	if (fn) {
-		for (rt = fn->leaf; rt; rt = rt->u.dst.rt6_next) {
+		for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) {
 			if (cfg->fc_ifindex &&
 			    (rt->rt6i_dev == NULL ||
 			     rt->rt6i_dev->ifindex != cfg->fc_ifindex))
@@ -1379,7 +1376,7 @@ static int ip6_route_del(struct fib6_config *cfg)
 				continue;
 			if (cfg->fc_metric && cfg->fc_metric != rt->rt6i_metric)
 				continue;
-			dst_hold(&rt->u.dst);
+			dst_hold(&rt->dst);
 			read_unlock_bh(&table->tb6_lock);
 
 			return __ip6_del_rt(rt, &cfg->fc_nlinfo);
@@ -1421,7 +1418,7 @@ static struct rt6_info *__ip6_route_redirect(struct net *net,
 	read_lock_bh(&table->tb6_lock);
 	fn = fib6_lookup(&table->tb6_root, &fl->fl6_dst, &fl->fl6_src);
 restart:
-	for (rt = fn->leaf; rt; rt = rt->u.dst.rt6_next) {
+	for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) {
 		/*
 		 * Current route is on-link; redirect is always invalid.
 		 *
@@ -1445,7 +1442,7 @@ restart:
 		rt = net->ipv6.ip6_null_entry;
 	BACKTRACK(net, &fl->fl6_src);
 out:
-	dst_hold(&rt->u.dst);
+	dst_hold(&rt->dst);
 
 	read_unlock_bh(&table->tb6_lock);
 
@@ -1513,10 +1510,10 @@ void rt6_redirect(struct in6_addr *dest, struct in6_addr *src,
 	 * Look, redirects are sent only in response to data packets,
 	 * so that this nexthop apparently is reachable. --ANK
 	 */
-	dst_confirm(&rt->u.dst);
+	dst_confirm(&rt->dst);
 
 	/* Duplicate redirect: silently ignore. */
-	if (neigh == rt->u.dst.neighbour)
+	if (neigh == rt->dst.neighbour)
 		goto out;
 
 	nrt = ip6_rt_copy(rt);
@@ -1529,20 +1526,20 @@ void rt6_redirect(struct in6_addr *dest, struct in6_addr *src,
 
 	ipv6_addr_copy(&nrt->rt6i_dst.addr, dest);
 	nrt->rt6i_dst.plen = 128;
-	nrt->u.dst.flags |= DST_HOST;
+	nrt->dst.flags |= DST_HOST;
 
 	ipv6_addr_copy(&nrt->rt6i_gateway, (struct in6_addr*)neigh->primary_key);
 	nrt->rt6i_nexthop = neigh_clone(neigh);
 	/* Reset pmtu, it may be better */
-	nrt->u.dst.metrics[RTAX_MTU-1] = ipv6_get_mtu(neigh->dev);
-	nrt->u.dst.metrics[RTAX_ADVMSS-1] = ipv6_advmss(dev_net(neigh->dev),
-							dst_mtu(&nrt->u.dst));
+	nrt->dst.metrics[RTAX_MTU-1] = ipv6_get_mtu(neigh->dev);
+	nrt->dst.metrics[RTAX_ADVMSS-1] = ipv6_advmss(dev_net(neigh->dev),
+							dst_mtu(&nrt->dst));
 
 	if (ip6_ins_rt(nrt))
 		goto out;
 
-	netevent.old = &rt->u.dst;
-	netevent.new = &nrt->u.dst;
+	netevent.old = &rt->dst;
+	netevent.new = &nrt->dst;
 	call_netevent_notifiers(NETEVENT_REDIRECT, &netevent);
 
 	if (rt->rt6i_flags&RTF_CACHE) {
@@ -1551,7 +1548,7 @@ void rt6_redirect(struct in6_addr *dest, struct in6_addr *src,
 	}
 
 out:
-	dst_release(&rt->u.dst);
+	dst_release(&rt->dst);
 }
 
 /*
@@ -1570,7 +1567,7 @@ void rt6_pmtu_discovery(struct in6_addr *daddr, struct in6_addr *saddr,
 	if (rt == NULL)
 		return;
 
-	if (pmtu >= dst_mtu(&rt->u.dst))
+	if (pmtu >= dst_mtu(&rt->dst))
 		goto out;
 
 	if (pmtu < IPV6_MIN_MTU) {
@@ -1588,7 +1585,7 @@ void rt6_pmtu_discovery(struct in6_addr *daddr, struct in6_addr *saddr,
 	   They are sent only in response to data packets,
 	   so that this nexthop apparently is reachable. --ANK
 	 */
-	dst_confirm(&rt->u.dst);
+	dst_confirm(&rt->dst);
 
 	/* Host route. If it is static, it would be better
 	   not to override it, but add new one, so that
@@ -1596,10 +1593,10 @@ void rt6_pmtu_discovery(struct in6_addr *daddr, struct in6_addr *saddr,
 	   would return automatically.
 	 */
 	if (rt->rt6i_flags & RTF_CACHE) {
-		rt->u.dst.metrics[RTAX_MTU-1] = pmtu;
+		rt->dst.metrics[RTAX_MTU-1] = pmtu;
 		if (allfrag)
-			rt->u.dst.metrics[RTAX_FEATURES-1] |= RTAX_FEATURE_ALLFRAG;
-		dst_set_expires(&rt->u.dst, net->ipv6.sysctl.ip6_rt_mtu_expires);
+			rt->dst.metrics[RTAX_FEATURES-1] |= RTAX_FEATURE_ALLFRAG;
+		dst_set_expires(&rt->dst, net->ipv6.sysctl.ip6_rt_mtu_expires);
 		rt->rt6i_flags |= RTF_MODIFIED|RTF_EXPIRES;
 		goto out;
 	}
@@ -1615,9 +1612,9 @@ void rt6_pmtu_discovery(struct in6_addr *daddr, struct in6_addr *saddr,
 		nrt = rt6_alloc_clone(rt, daddr);
 
 	if (nrt) {
-		nrt->u.dst.metrics[RTAX_MTU-1] = pmtu;
+		nrt->dst.metrics[RTAX_MTU-1] = pmtu;
 		if (allfrag)
-			nrt->u.dst.metrics[RTAX_FEATURES-1] |= RTAX_FEATURE_ALLFRAG;
+			nrt->dst.metrics[RTAX_FEATURES-1] |= RTAX_FEATURE_ALLFRAG;
 
 		/* According to RFC 1981, detecting PMTU increase shouldn't be
 		 * happened within 5 mins, the recommended timer is 10 mins.
@@ -1625,13 +1622,13 @@ void rt6_pmtu_discovery(struct in6_addr *daddr, struct in6_addr *saddr,
 		 * which is 10 mins. After 10 mins the decreased pmtu is expired
 		 * and detecting PMTU increase will be automatically happened.
 		 */
-		dst_set_expires(&nrt->u.dst, net->ipv6.sysctl.ip6_rt_mtu_expires);
+		dst_set_expires(&nrt->dst, net->ipv6.sysctl.ip6_rt_mtu_expires);
 		nrt->rt6i_flags |= RTF_DYNAMIC|RTF_EXPIRES;
 
 		ip6_ins_rt(nrt);
 	}
 out:
-	dst_release(&rt->u.dst);
+	dst_release(&rt->dst);
 }
 
 /*
@@ -1644,18 +1641,18 @@ static struct rt6_info * ip6_rt_copy(struct rt6_info *ort)
 	struct rt6_info *rt = ip6_dst_alloc(&net->ipv6.ip6_dst_ops);
 
 	if (rt) {
-		rt->u.dst.input = ort->u.dst.input;
-		rt->u.dst.output = ort->u.dst.output;
-
-		memcpy(rt->u.dst.metrics, ort->u.dst.metrics, RTAX_MAX*sizeof(u32));
-		rt->u.dst.error = ort->u.dst.error;
-		rt->u.dst.dev = ort->u.dst.dev;
-		if (rt->u.dst.dev)
-			dev_hold(rt->u.dst.dev);
+		rt->dst.input = ort->dst.input;
+		rt->dst.output = ort->dst.output;
+
+		memcpy(rt->dst.metrics, ort->dst.metrics, RTAX_MAX*sizeof(u32));
+		rt->dst.error = ort->dst.error;
+		rt->dst.dev = ort->dst.dev;
+		if (rt->dst.dev)
+			dev_hold(rt->dst.dev);
 		rt->rt6i_idev = ort->rt6i_idev;
 		if (rt->rt6i_idev)
 			in6_dev_hold(rt->rt6i_idev);
-		rt->u.dst.lastuse = jiffies;
+		rt->dst.lastuse = jiffies;
 		rt->rt6i_expires = 0;
 
 		ipv6_addr_copy(&rt->rt6i_gateway, &ort->rt6i_gateway);
@@ -1689,14 +1686,14 @@ static struct rt6_info *rt6_get_route_info(struct net *net,
 	if (!fn)
 		goto out;
 
-	for (rt = fn->leaf; rt; rt = rt->u.dst.rt6_next) {
+	for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) {
 		if (rt->rt6i_dev->ifindex != ifindex)
 			continue;
 		if ((rt->rt6i_flags & (RTF_ROUTEINFO|RTF_GATEWAY)) != (RTF_ROUTEINFO|RTF_GATEWAY))
 			continue;
 		if (!ipv6_addr_equal(&rt->rt6i_gateway, gwaddr))
 			continue;
-		dst_hold(&rt->u.dst);
+		dst_hold(&rt->dst);
 		break;
 	}
 out:
@@ -1744,14 +1741,14 @@ struct rt6_info *rt6_get_dflt_router(struct in6_addr *addr, struct net_device *d
 		return NULL;
 
 	write_lock_bh(&table->tb6_lock);
-	for (rt = table->tb6_root.leaf; rt; rt=rt->u.dst.rt6_next) {
+	for (rt = table->tb6_root.leaf; rt; rt=rt->dst.rt6_next) {
 		if (dev == rt->rt6i_dev &&
 		    ((rt->rt6i_flags & (RTF_ADDRCONF | RTF_DEFAULT)) == (RTF_ADDRCONF | RTF_DEFAULT)) &&
 		    ipv6_addr_equal(&rt->rt6i_gateway, addr))
 			break;
 	}
 	if (rt)
-		dst_hold(&rt->u.dst);
+		dst_hold(&rt->dst);
 	write_unlock_bh(&table->tb6_lock);
 	return rt;
 }
@@ -1790,9 +1787,9 @@ void rt6_purge_dflt_routers(struct net *net)
 
 restart:
 	read_lock_bh(&table->tb6_lock);
-	for (rt = table->tb6_root.leaf; rt; rt = rt->u.dst.rt6_next) {
+	for (rt = table->tb6_root.leaf; rt; rt = rt->dst.rt6_next) {
 		if (rt->rt6i_flags & (RTF_DEFAULT | RTF_ADDRCONF)) {
-			dst_hold(&rt->u.dst);
+			dst_hold(&rt->dst);
 			read_unlock_bh(&table->tb6_lock);
 			ip6_del_rt(rt);
 			goto restart;
@@ -1930,15 +1927,15 @@ struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
 	dev_hold(net->loopback_dev);
 	in6_dev_hold(idev);
 
-	rt->u.dst.flags = DST_HOST;
-	rt->u.dst.input = ip6_input;
-	rt->u.dst.output = ip6_output;
+	rt->dst.flags = DST_HOST;
+	rt->dst.input = ip6_input;
+	rt->dst.output = ip6_output;
 	rt->rt6i_dev = net->loopback_dev;
 	rt->rt6i_idev = idev;
-	rt->u.dst.metrics[RTAX_MTU-1] = ipv6_get_mtu(rt->rt6i_dev);
-	rt->u.dst.metrics[RTAX_ADVMSS-1] = ipv6_advmss(net, dst_mtu(&rt->u.dst));
-	rt->u.dst.metrics[RTAX_HOPLIMIT-1] = -1;
-	rt->u.dst.obsolete = -1;
+	rt->dst.metrics[RTAX_MTU-1] = ipv6_get_mtu(rt->rt6i_dev);
+	rt->dst.metrics[RTAX_ADVMSS-1] = ipv6_advmss(net, dst_mtu(&rt->dst));
+	rt->dst.metrics[RTAX_HOPLIMIT-1] = -1;
+	rt->dst.obsolete = -1;
 
 	rt->rt6i_flags = RTF_UP | RTF_NONEXTHOP;
 	if (anycast)
@@ -1947,7 +1944,7 @@ struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
 		rt->rt6i_flags |= RTF_LOCAL;
 	neigh = ndisc_get_neigh(rt->rt6i_dev, &rt->rt6i_gateway);
 	if (IS_ERR(neigh)) {
-		dst_free(&rt->u.dst);
+		dst_free(&rt->dst);
 
 		/* We are casting this because that is the return
 		 * value type.  But an errno encoded pointer is the
@@ -1962,7 +1959,7 @@ struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
 	rt->rt6i_dst.plen = 128;
 	rt->rt6i_table = fib6_get_table(net, RT6_TABLE_LOCAL);
 
-	atomic_set(&rt->u.dst.__refcnt, 1);
+	atomic_set(&rt->dst.__refcnt, 1);
 
 	return rt;
 }
@@ -2033,12 +2030,12 @@ static int rt6_mtu_change_route(struct rt6_info *rt, void *p_arg)
 	   PMTU discouvery.
 	 */
 	if (rt->rt6i_dev == arg->dev &&
-	    !dst_metric_locked(&rt->u.dst, RTAX_MTU) &&
-	    (dst_mtu(&rt->u.dst) >= arg->mtu ||
-	     (dst_mtu(&rt->u.dst) < arg->mtu &&
-	      dst_mtu(&rt->u.dst) == idev->cnf.mtu6))) {
-		rt->u.dst.metrics[RTAX_MTU-1] = arg->mtu;
-		rt->u.dst.metrics[RTAX_ADVMSS-1] = ipv6_advmss(net, arg->mtu);
+	    !dst_metric_locked(&rt->dst, RTAX_MTU) &&
+	    (dst_mtu(&rt->dst) >= arg->mtu ||
+	     (dst_mtu(&rt->dst) < arg->mtu &&
+	      dst_mtu(&rt->dst) == idev->cnf.mtu6))) {
+		rt->dst.metrics[RTAX_MTU-1] = arg->mtu;
+		rt->dst.metrics[RTAX_ADVMSS-1] = ipv6_advmss(net, arg->mtu);
 	}
 	return 0;
 }
@@ -2252,20 +2249,20 @@ static int rt6_fill_node(struct net *net,
 #endif
 			NLA_PUT_U32(skb, RTA_IIF, iif);
 	} else if (dst) {
-		struct inet6_dev *idev = ip6_dst_idev(&rt->u.dst);
+		struct inet6_dev *idev = ip6_dst_idev(&rt->dst);
 		struct in6_addr saddr_buf;
 		if (ipv6_dev_get_saddr(net, idev ? idev->dev : NULL,
 				       dst, 0, &saddr_buf) == 0)
 			NLA_PUT(skb, RTA_PREFSRC, 16, &saddr_buf);
 	}
 
-	if (rtnetlink_put_metrics(skb, rt->u.dst.metrics) < 0)
+	if (rtnetlink_put_metrics(skb, rt->dst.metrics) < 0)
 		goto nla_put_failure;
 
-	if (rt->u.dst.neighbour)
-		NLA_PUT(skb, RTA_GATEWAY, 16, &rt->u.dst.neighbour->primary_key);
+	if (rt->dst.neighbour)
+		NLA_PUT(skb, RTA_GATEWAY, 16, &rt->dst.neighbour->primary_key);
 
-	if (rt->u.dst.dev)
+	if (rt->dst.dev)
 		NLA_PUT_U32(skb, RTA_OIF, rt->rt6i_dev->ifindex);
 
 	NLA_PUT_U32(skb, RTA_PRIORITY, rt->rt6i_metric);
@@ -2277,8 +2274,8 @@ static int rt6_fill_node(struct net *net,
 	else
 		expires = INT_MAX;
 
-	if (rtnl_put_cacheinfo(skb, &rt->u.dst, 0, 0, 0,
-			       expires, rt->u.dst.error) < 0)
+	if (rtnl_put_cacheinfo(skb, &rt->dst, 0, 0, 0,
+			       expires, rt->dst.error) < 0)
 		goto nla_put_failure;
 
 	return nlmsg_end(skb, nlh);
@@ -2364,7 +2361,7 @@ static int inet6_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void
 	skb_reserve(skb, MAX_HEADER + sizeof(struct ipv6hdr));
 
 	rt = (struct rt6_info*) ip6_route_output(net, NULL, &fl);
-	skb_dst_set(skb, &rt->u.dst);
+	skb_dst_set(skb, &rt->dst);
 
 	err = rt6_fill_node(net, skb, rt, &fl.fl6_dst, &fl.fl6_src, iif,
 			    RTM_NEWROUTE, NETLINK_CB(in_skb).pid,
@@ -2416,12 +2413,12 @@ static int ip6_route_dev_notify(struct notifier_block *this,
 	struct net *net = dev_net(dev);
 
 	if (event == NETDEV_REGISTER && (dev->flags & IFF_LOOPBACK)) {
-		net->ipv6.ip6_null_entry->u.dst.dev = dev;
+		net->ipv6.ip6_null_entry->dst.dev = dev;
 		net->ipv6.ip6_null_entry->rt6i_idev = in6_dev_get(dev);
 #ifdef CONFIG_IPV6_MULTIPLE_TABLES
-		net->ipv6.ip6_prohibit_entry->u.dst.dev = dev;
+		net->ipv6.ip6_prohibit_entry->dst.dev = dev;
 		net->ipv6.ip6_prohibit_entry->rt6i_idev = in6_dev_get(dev);
-		net->ipv6.ip6_blk_hole_entry->u.dst.dev = dev;
+		net->ipv6.ip6_blk_hole_entry->dst.dev = dev;
 		net->ipv6.ip6_blk_hole_entry->rt6i_idev = in6_dev_get(dev);
 #endif
 	}
@@ -2464,8 +2461,8 @@ static int rt6_info_route(struct rt6_info *rt, void *p_arg)
 		seq_puts(m, "00000000000000000000000000000000");
 	}
 	seq_printf(m, " %08x %08x %08x %08x %8s\n",
-		   rt->rt6i_metric, atomic_read(&rt->u.dst.__refcnt),
-		   rt->u.dst.__use, rt->rt6i_flags,
+		   rt->rt6i_metric, atomic_read(&rt->dst.__refcnt),
+		   rt->dst.__use, rt->rt6i_flags,
 		   rt->rt6i_dev ? rt->rt6i_dev->name : "");
 	return 0;
 }
@@ -2646,9 +2643,9 @@ static int __net_init ip6_route_net_init(struct net *net)
 					   GFP_KERNEL);
 	if (!net->ipv6.ip6_null_entry)
 		goto out_ip6_dst_ops;
-	net->ipv6.ip6_null_entry->u.dst.path =
+	net->ipv6.ip6_null_entry->dst.path =
 		(struct dst_entry *)net->ipv6.ip6_null_entry;
-	net->ipv6.ip6_null_entry->u.dst.ops = &net->ipv6.ip6_dst_ops;
+	net->ipv6.ip6_null_entry->dst.ops = &net->ipv6.ip6_dst_ops;
 
 #ifdef CONFIG_IPV6_MULTIPLE_TABLES
 	net->ipv6.ip6_prohibit_entry = kmemdup(&ip6_prohibit_entry_template,
@@ -2656,18 +2653,18 @@ static int __net_init ip6_route_net_init(struct net *net)
 					       GFP_KERNEL);
 	if (!net->ipv6.ip6_prohibit_entry)
 		goto out_ip6_null_entry;
-	net->ipv6.ip6_prohibit_entry->u.dst.path =
+	net->ipv6.ip6_prohibit_entry->dst.path =
 		(struct dst_entry *)net->ipv6.ip6_prohibit_entry;
-	net->ipv6.ip6_prohibit_entry->u.dst.ops = &net->ipv6.ip6_dst_ops;
+	net->ipv6.ip6_prohibit_entry->dst.ops = &net->ipv6.ip6_dst_ops;
 
 	net->ipv6.ip6_blk_hole_entry = kmemdup(&ip6_blk_hole_entry_template,
 					       sizeof(*net->ipv6.ip6_blk_hole_entry),
 					       GFP_KERNEL);
 	if (!net->ipv6.ip6_blk_hole_entry)
 		goto out_ip6_prohibit_entry;
-	net->ipv6.ip6_blk_hole_entry->u.dst.path =
+	net->ipv6.ip6_blk_hole_entry->dst.path =
 		(struct dst_entry *)net->ipv6.ip6_blk_hole_entry;
-	net->ipv6.ip6_blk_hole_entry->u.dst.ops = &net->ipv6.ip6_dst_ops;
+	net->ipv6.ip6_blk_hole_entry->dst.ops = &net->ipv6.ip6_dst_ops;
 #endif
 
 	net->ipv6.sysctl.flush_delay = 0;
@@ -2742,12 +2739,12 @@ int __init ip6_route_init(void)
 	/* Registering of the loopback is done before this portion of code,
 	 * the loopback reference in rt6_info will not be taken, do it
 	 * manually for init_net */
-	init_net.ipv6.ip6_null_entry->u.dst.dev = init_net.loopback_dev;
+	init_net.ipv6.ip6_null_entry->dst.dev = init_net.loopback_dev;
 	init_net.ipv6.ip6_null_entry->rt6i_idev = in6_dev_get(init_net.loopback_dev);
   #ifdef CONFIG_IPV6_MULTIPLE_TABLES
-	init_net.ipv6.ip6_prohibit_entry->u.dst.dev = init_net.loopback_dev;
+	init_net.ipv6.ip6_prohibit_entry->dst.dev = init_net.loopback_dev;
 	init_net.ipv6.ip6_prohibit_entry->rt6i_idev = in6_dev_get(init_net.loopback_dev);
-	init_net.ipv6.ip6_blk_hole_entry->u.dst.dev = init_net.loopback_dev;
+	init_net.ipv6.ip6_blk_hole_entry->dst.dev = init_net.loopback_dev;
 	init_net.ipv6.ip6_blk_hole_entry->rt6i_idev = in6_dev_get(init_net.loopback_dev);
   #endif
 	ret = fib6_init();
diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index e51e650ea80..4699cd3c311 100644
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -249,8 +249,6 @@ failed:
 	return NULL;
 }
 
-static DEFINE_SPINLOCK(ipip6_prl_lock);
-
 #define for_each_prl_rcu(start)			\
 	for (prl = rcu_dereference(start);	\
 	     prl;				\
@@ -340,7 +338,7 @@ ipip6_tunnel_add_prl(struct ip_tunnel *t, struct ip_tunnel_prl *a, int chg)
 	if (a->addr == htonl(INADDR_ANY))
 		return -EINVAL;
 
-	spin_lock(&ipip6_prl_lock);
+	ASSERT_RTNL();
 
 	for (p = t->prl; p; p = p->next) {
 		if (p->addr == a->addr) {
@@ -370,7 +368,6 @@ ipip6_tunnel_add_prl(struct ip_tunnel *t, struct ip_tunnel_prl *a, int chg)
 	t->prl_count++;
 	rcu_assign_pointer(t->prl, p);
 out:
-	spin_unlock(&ipip6_prl_lock);
 	return err;
 }
 
@@ -397,7 +394,7 @@ ipip6_tunnel_del_prl(struct ip_tunnel *t, struct ip_tunnel_prl *a)
 	struct ip_tunnel_prl_entry *x, **p;
 	int err = 0;
 
-	spin_lock(&ipip6_prl_lock);
+	ASSERT_RTNL();
 
 	if (a && a->addr != htonl(INADDR_ANY)) {
 		for (p = &t->prl; *p; p = &(*p)->next) {
@@ -419,7 +416,6 @@ ipip6_tunnel_del_prl(struct ip_tunnel *t, struct ip_tunnel_prl *a)
 		}
 	}
 out:
-	spin_unlock(&ipip6_prl_lock);
 	return err;
 }
 
@@ -716,7 +712,7 @@ static netdev_tx_t ipip6_tunnel_xmit(struct sk_buff *skb,
 		stats->tx_carrier_errors++;
 		goto tx_error_icmp;
 	}
-	tdev = rt->u.dst.dev;
+	tdev = rt->dst.dev;
 
 	if (tdev == dev) {
 		ip_rt_put(rt);
@@ -725,7 +721,7 @@ static netdev_tx_t ipip6_tunnel_xmit(struct sk_buff *skb,
 	}
 
 	if (df) {
-		mtu = dst_mtu(&rt->u.dst) - sizeof(struct iphdr);
+		mtu = dst_mtu(&rt->dst) - sizeof(struct iphdr);
 
 		if (mtu < 68) {
 			stats->collisions++;
@@ -784,7 +780,7 @@ static netdev_tx_t ipip6_tunnel_xmit(struct sk_buff *skb,
 	memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
 	IPCB(skb)->flags = 0;
 	skb_dst_drop(skb);
-	skb_dst_set(skb, &rt->u.dst);
+	skb_dst_set(skb, &rt->dst);
 
 	/*
 	 *	Push down and install the IPIP header.
@@ -833,7 +829,7 @@ static void ipip6_tunnel_bind_dev(struct net_device *dev)
 				    .proto = IPPROTO_IPV6 };
 		struct rtable *rt;
 		if (!ip_route_output_key(dev_net(dev), &rt, &fl)) {
-			tdev = rt->u.dst.dev;
+			tdev = rt->dst.dev;
 			ip_rt_put(rt);
 		}
 		dev->flags |= IFF_POINTOPOINT;
diff --git a/net/ipv6/syncookies.c b/net/ipv6/syncookies.c
index 34d1f0690d7..70d330f8c99 100644
--- a/net/ipv6/syncookies.c
+++ b/net/ipv6/syncookies.c
@@ -27,28 +27,17 @@ extern __u32 syncookie_secret[2][16-4+SHA_DIGEST_WORDS];
 #define COOKIEBITS 24	/* Upper bits store count */
 #define COOKIEMASK (((__u32)1 << COOKIEBITS) - 1)
 
-/*
- * This table has to be sorted and terminated with (__u16)-1.
- * XXX generate a better table.
- * Unresolved Issues: HIPPI with a 64k MSS is not well supported.
- *
- * Taken directly from ipv4 implementation.
- * Should this list be modified for ipv6 use or is it close enough?
- * rfc 2460 8.3 suggests mss values 20 bytes less than ipv4 counterpart
- */
+/* Table must be sorted. */
 static __u16 const msstab[] = {
-	64 - 1,
-	256 - 1,
-	512 - 1,
-	536 - 1,
-	1024 - 1,
-	1440 - 1,
-	1460 - 1,
-	4312 - 1,
-	(__u16)-1
+	64,
+	512,
+	536,
+	1280 - 60,
+	1480 - 60,
+	1500 - 60,
+	4460 - 60,
+	9000 - 60,
 };
-/* The number doesn't include the -1 terminator */
-#define NUM_MSS (ARRAY_SIZE(msstab) - 1)
 
 /*
  * This (misnamed) value is the age of syncookie which is permitted.
@@ -134,9 +123,11 @@ __u32 cookie_v6_init_sequence(struct sock *sk, struct sk_buff *skb, __u16 *mssp)
 
 	tcp_synq_overflow(sk);
 
-	for (mssind = 0; mss > msstab[mssind + 1]; mssind++)
-		;
-	*mssp = msstab[mssind] + 1;
+	for (mssind = ARRAY_SIZE(msstab) - 1; mssind ; mssind--)
+		if (mss >= msstab[mssind])
+			break;
+
+	*mssp = msstab[mssind];
 
 	NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_SYNCOOKIESSENT);
 
@@ -154,7 +145,7 @@ static inline int cookie_check(struct sk_buff *skb, __u32 cookie)
 					    th->source, th->dest, seq,
 					    jiffies / (HZ * 60), COUNTER_TRIES);
 
-	return mssind < NUM_MSS ? msstab[mssind] + 1 : 0;
+	return mssind < ARRAY_SIZE(msstab) ? msstab[mssind] : 0;
 }
 
 struct sock *cookie_v6_check(struct sock *sk, struct sk_buff *skb)
@@ -174,7 +165,7 @@ struct sock *cookie_v6_check(struct sock *sk, struct sk_buff *skb)
 	struct dst_entry *dst;
 	__u8 rcv_wscale;
 
-	if (!sysctl_tcp_syncookies || !th->ack)
+	if (!sysctl_tcp_syncookies || !th->ack || th->rst)
 		goto out;
 
 	if (tcp_synq_no_recent_overflow(sk) ||
@@ -240,17 +231,12 @@ struct sock *cookie_v6_check(struct sock *sk, struct sk_buff *skb)
 	 * me if there is a preferred way.
 	 */
 	{
-		struct in6_addr *final_p = NULL, final;
+		struct in6_addr *final_p, final;
 		struct flowi fl;
 		memset(&fl, 0, sizeof(fl));
 		fl.proto = IPPROTO_TCP;
 		ipv6_addr_copy(&fl.fl6_dst, &ireq6->rmt_addr);
-		if (np->opt && np->opt->srcrt) {
-			struct rt0_hdr *rt0 = (struct rt0_hdr *) np->opt->srcrt;
-			ipv6_addr_copy(&final, &fl.fl6_dst);
-			ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
-			final_p = &final;
-		}
+		final_p = fl6_update_dst(&fl, np->opt, &final);
 		ipv6_addr_copy(&fl.fl6_src, &ireq6->loc_addr);
 		fl.oif = sk->sk_bound_dev_if;
 		fl.mark = sk->sk_mark;
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 2b7c3a100e2..5887141ad64 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -129,7 +129,7 @@ static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
 	struct inet_connection_sock *icsk = inet_csk(sk);
 	struct ipv6_pinfo *np = inet6_sk(sk);
 	struct tcp_sock *tp = tcp_sk(sk);
-	struct in6_addr *saddr = NULL, *final_p = NULL, final;
+	struct in6_addr *saddr = NULL, *final_p, final;
 	struct flowi fl;
 	struct dst_entry *dst;
 	int addr_type;
@@ -250,12 +250,7 @@ static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
 	fl.fl_ip_dport = usin->sin6_port;
 	fl.fl_ip_sport = inet->inet_sport;
 
-	if (np->opt && np->opt->srcrt) {
-		struct rt0_hdr *rt0 = (struct rt0_hdr *)np->opt->srcrt;
-		ipv6_addr_copy(&final, &fl.fl6_dst);
-		ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
-		final_p = &final;
-	}
+	final_p = fl6_update_dst(&fl, np->opt, &final);
 
 	security_sk_classify_flow(sk, &fl);
 
@@ -477,7 +472,7 @@ static int tcp_v6_send_synack(struct sock *sk, struct request_sock *req,
 	struct ipv6_pinfo *np = inet6_sk(sk);
 	struct sk_buff * skb;
 	struct ipv6_txoptions *opt = NULL;
-	struct in6_addr * final_p = NULL, final;
+	struct in6_addr * final_p, final;
 	struct flowi fl;
 	struct dst_entry *dst;
 	int err = -1;
@@ -494,12 +489,7 @@ static int tcp_v6_send_synack(struct sock *sk, struct request_sock *req,
 	security_req_classify_flow(req, &fl);
 
 	opt = np->opt;
-	if (opt && opt->srcrt) {
-		struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt;
-		ipv6_addr_copy(&final, &fl.fl6_dst);
-		ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
-		final_p = &final;
-	}
+	final_p = fl6_update_dst(&fl, opt, &final);
 
 	err = ip6_dst_lookup(sk, &dst, &fl);
 	if (err)
@@ -1167,7 +1157,7 @@ static struct sock *tcp_v6_hnd_req(struct sock *sk,struct sk_buff *skb)
 	}
 
 #ifdef CONFIG_SYN_COOKIES
-	if (!th->rst && !th->syn && th->ack)
+	if (!th->syn)
 		sk = cookie_v6_check(sk, skb);
 #endif
 	return sk;
@@ -1392,18 +1382,13 @@ static struct sock * tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
 		goto out_overflow;
 
 	if (dst == NULL) {
-		struct in6_addr *final_p = NULL, final;
+		struct in6_addr *final_p, final;
 		struct flowi fl;
 
 		memset(&fl, 0, sizeof(fl));
 		fl.proto = IPPROTO_TCP;
 		ipv6_addr_copy(&fl.fl6_dst, &treq->rmt_addr);
-		if (opt && opt->srcrt) {
-			struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt;
-			ipv6_addr_copy(&final, &fl.fl6_dst);
-			ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
-			final_p = &final;
-		}
+		final_p = fl6_update_dst(&fl, opt, &final);
 		ipv6_addr_copy(&fl.fl6_src, &treq->loc_addr);
 		fl.oif = sk->sk_bound_dev_if;
 		fl.mark = sk->sk_mark;
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 3048f906c04..1dd1affdead 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -466,11 +466,9 @@ void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
 	if (sk->sk_state != TCP_ESTABLISHED && !np->recverr)
 		goto out;
 
-	if (np->recverr) {
-		bh_lock_sock(sk);
+	if (np->recverr)
 		ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1));
-		bh_unlock_sock(sk);
-	}
+
 	sk->sk_err = err;
 	sk->sk_error_report(sk);
 out:
@@ -929,7 +927,7 @@ int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk,
 	struct inet_sock *inet = inet_sk(sk);
 	struct ipv6_pinfo *np = inet6_sk(sk);
 	struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) msg->msg_name;
-	struct in6_addr *daddr, *final_p = NULL, final;
+	struct in6_addr *daddr, *final_p, final;
 	struct ipv6_txoptions *opt = NULL;
 	struct ip6_flowlabel *flowlabel = NULL;
 	struct flowi fl;
@@ -1099,14 +1097,9 @@ do_udp_sendmsg:
 		ipv6_addr_copy(&fl.fl6_src, &np->saddr);
 	fl.fl_ip_sport = inet->inet_sport;
 
-	/* merge ip6_build_xmit from ip6_output */
-	if (opt && opt->srcrt) {
-		struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt;
-		ipv6_addr_copy(&final, &fl.fl6_dst);
-		ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
-		final_p = &final;
+	final_p = fl6_update_dst(&fl, opt, &final);
+	if (final_p)
 		connected = 0;
-	}
 
 	if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) {
 		fl.oif = np->mcast_oif;