30 files changed, 404 insertions, 295 deletions

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 8f13d88d7db..498b927f68b 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -289,19 +289,19 @@ static int snmp6_alloc_dev(struct inet6_dev *idev)
 			  sizeof(struct ipstats_mib),
 			  __alignof__(struct ipstats_mib)) < 0)
 		goto err_ip;
-	if (snmp_mib_init((void __percpu **)idev->stats.icmpv6,
-			  sizeof(struct icmpv6_mib),
-			  __alignof__(struct icmpv6_mib)) < 0)
+	idev->stats.icmpv6dev = kzalloc(sizeof(struct icmpv6_mib_device),
+					GFP_KERNEL);
+	if (!idev->stats.icmpv6dev)
 		goto err_icmp;
-	if (snmp_mib_init((void __percpu **)idev->stats.icmpv6msg,
-			  sizeof(struct icmpv6msg_mib),
-			  __alignof__(struct icmpv6msg_mib)) < 0)
+	idev->stats.icmpv6msgdev = kzalloc(sizeof(struct icmpv6msg_mib_device),
+					   GFP_KERNEL);
+	if (!idev->stats.icmpv6msgdev)
 		goto err_icmpmsg;
 
 	return 0;
 
 err_icmpmsg:
-	snmp_mib_free((void __percpu **)idev->stats.icmpv6);
+	kfree(idev->stats.icmpv6dev);
 err_icmp:
 	snmp_mib_free((void __percpu **)idev->stats.ipv6);
 err_ip:
@@ -310,8 +310,8 @@ err_ip:
 
 static void snmp6_free_dev(struct inet6_dev *idev)
 {
-	snmp_mib_free((void __percpu **)idev->stats.icmpv6msg);
-	snmp_mib_free((void __percpu **)idev->stats.icmpv6);
+	kfree(idev->stats.icmpv6msgdev);
+	kfree(idev->stats.icmpv6dev);
 	snmp_mib_free((void __percpu **)idev->stats.ipv6);
 }
 
@@ -813,6 +813,8 @@ static void ipv6_del_addr(struct inet6_ifaddr *ifp)
 		dst_release(&rt->dst);
 	}
 
+	/* clean up prefsrc entries */
+	rt6_remove_prefsrc(ifp);
 out:
 	in6_ifa_put(ifp);
 }
@@ -1269,7 +1271,7 @@ static int ipv6_count_addresses(struct inet6_dev *idev)
 	return cnt;
 }
 
-int ipv6_chk_addr(struct net *net, struct in6_addr *addr,
+int ipv6_chk_addr(struct net *net, const struct in6_addr *addr,
 		  struct net_device *dev, int strict)
 {
 	struct inet6_ifaddr *ifp;
@@ -1312,7 +1314,7 @@ static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
 	return false;
 }
 
-int ipv6_chk_prefix(struct in6_addr *addr, struct net_device *dev)
+int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev)
 {
 	struct inet6_dev *idev;
 	struct inet6_ifaddr *ifa;
@@ -1443,7 +1445,7 @@ void addrconf_dad_failure(struct inet6_ifaddr *ifp)
 
 /* Join to solicited addr multicast group. */
 
-void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr)
+void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr)
 {
 	struct in6_addr maddr;
 
@@ -1454,7 +1456,7 @@ void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr)
 	ipv6_dev_mc_inc(dev, &maddr);
 }
 
-void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr)
+void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr)
 {
 	struct in6_addr maddr;
 
@@ -2099,7 +2101,7 @@ err_exit:
 /*
  *	Manual configuration of address on an interface
  */
-static int inet6_addr_add(struct net *net, int ifindex, struct in6_addr *pfx,
+static int inet6_addr_add(struct net *net, int ifindex, const struct in6_addr *pfx,
 			  unsigned int plen, __u8 ifa_flags, __u32 prefered_lft,
 			  __u32 valid_lft)
 {
@@ -2173,7 +2175,7 @@ static int inet6_addr_add(struct net *net, int ifindex, struct in6_addr *pfx,
 	return PTR_ERR(ifp);
 }
 
-static int inet6_addr_del(struct net *net, int ifindex, struct in6_addr *pfx,
+static int inet6_addr_del(struct net *net, int ifindex, const struct in6_addr *pfx,
 			  unsigned int plen)
 {
 	struct inet6_ifaddr *ifp;
@@ -2336,7 +2338,7 @@ static void init_loopback(struct net_device *dev)
 	add_addr(idev, &in6addr_loopback, 128, IFA_HOST);
 }
 
-static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr)
+static void addrconf_add_linklocal(struct inet6_dev *idev, const struct in6_addr *addr)
 {
 	struct inet6_ifaddr * ifp;
 	u32 addr_flags = IFA_F_PERMANENT;
@@ -3107,7 +3109,7 @@ void if6_proc_exit(void)
 
 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
 /* Check if address is a home address configured on any interface. */
-int ipv6_chk_home_addr(struct net *net, struct in6_addr *addr)
+int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr)
 {
 	int ret = 0;
 	struct inet6_ifaddr *ifp = NULL;
@@ -3824,7 +3826,7 @@ static inline size_t inet6_if_nlmsg_size(void)
 	       + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */
 }
 
-static inline void __snmp6_fill_stats(u64 *stats, void __percpu **mib,
+static inline void __snmp6_fill_statsdev(u64 *stats, atomic_long_t *mib,
 				      int items, int bytes)
 {
 	int i;
@@ -3834,7 +3836,7 @@ static inline void __snmp6_fill_stats(u64 *stats, void __percpu **mib,
 	/* Use put_unaligned() because stats may not be aligned for u64. */
 	put_unaligned(items, &stats[0]);
 	for (i = 1; i < items; i++)
-		put_unaligned(snmp_fold_field(mib, i), &stats[i]);
+		put_unaligned(atomic_long_read(&mib[i]), &stats[i]);
 
 	memset(&stats[items], 0, pad);
 }
@@ -3863,7 +3865,7 @@ static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype,
 				     IPSTATS_MIB_MAX, bytes, offsetof(struct ipstats_mib, syncp));
 		break;
 	case IFLA_INET6_ICMP6STATS:
-		__snmp6_fill_stats(stats, (void __percpu **)idev->stats.icmpv6, ICMP6_MIB_MAX, bytes);
+		__snmp6_fill_statsdev(stats, idev->stats.icmpv6dev->mibs, ICMP6_MIB_MAX, bytes);
 		break;
 	}
 }
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index afcc7099f96..b7919f901fb 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -740,7 +740,7 @@ static int ipv6_gso_pull_exthdrs(struct sk_buff *skb, int proto)
 
 static int ipv6_gso_send_check(struct sk_buff *skb)
 {
-	struct ipv6hdr *ipv6h;
+	const struct ipv6hdr *ipv6h;
 	const struct inet6_protocol *ops;
 	int err = -EINVAL;
 
diff --git a/net/ipv6/anycast.c b/net/ipv6/anycast.c
index 0e5e943446f..674255f5e6b 100644
--- a/net/ipv6/anycast.c
+++ b/net/ipv6/anycast.c
@@ -44,7 +44,7 @@
 
 #include <net/checksum.h>
 
-static int ipv6_dev_ac_dec(struct net_device *dev, struct in6_addr *addr);
+static int ipv6_dev_ac_dec(struct net_device *dev, const struct in6_addr *addr);
 
 /* Big ac list lock for all the sockets */
 static DEFINE_RWLOCK(ipv6_sk_ac_lock);
@@ -54,7 +54,7 @@ static DEFINE_RWLOCK(ipv6_sk_ac_lock);
  *	socket join an anycast group
  */
 
-int ipv6_sock_ac_join(struct sock *sk, int ifindex, struct in6_addr *addr)
+int ipv6_sock_ac_join(struct sock *sk, int ifindex, const struct in6_addr *addr)
 {
 	struct ipv6_pinfo *np = inet6_sk(sk);
 	struct net_device *dev = NULL;
@@ -145,7 +145,7 @@ error:
 /*
  *	socket leave an anycast group
  */
-int ipv6_sock_ac_drop(struct sock *sk, int ifindex, struct in6_addr *addr)
+int ipv6_sock_ac_drop(struct sock *sk, int ifindex, const struct in6_addr *addr)
 {
 	struct ipv6_pinfo *np = inet6_sk(sk);
 	struct net_device *dev;
@@ -252,7 +252,7 @@ static void aca_put(struct ifacaddr6 *ac)
 /*
  *	device anycast group inc (add if not found)
  */
-int ipv6_dev_ac_inc(struct net_device *dev, struct in6_addr *addr)
+int ipv6_dev_ac_inc(struct net_device *dev, const struct in6_addr *addr)
 {
 	struct ifacaddr6 *aca;
 	struct inet6_dev *idev;
@@ -324,7 +324,7 @@ out:
 /*
  *	device anycast group decrement
  */
-int __ipv6_dev_ac_dec(struct inet6_dev *idev, struct in6_addr *addr)
+int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr)
 {
 	struct ifacaddr6 *aca, *prev_aca;
 
@@ -358,7 +358,7 @@ int __ipv6_dev_ac_dec(struct inet6_dev *idev, struct in6_addr *addr)
 }
 
 /* called with rcu_read_lock() */
-static int ipv6_dev_ac_dec(struct net_device *dev, struct in6_addr *addr)
+static int ipv6_dev_ac_dec(struct net_device *dev, const struct in6_addr *addr)
 {
 	struct inet6_dev *idev = __in6_dev_get(dev);
 
@@ -371,7 +371,7 @@ static int ipv6_dev_ac_dec(struct net_device *dev, struct in6_addr *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)
+static int ipv6_chk_acast_dev(struct net_device *dev, const struct in6_addr *addr)
 {
 	struct inet6_dev *idev;
 	struct ifacaddr6 *aca;
@@ -392,7 +392,7 @@ static int ipv6_chk_acast_dev(struct net_device *dev, struct in6_addr *addr)
  *	check if given interface (or any, if dev==0) has this anycast address
  */
 int ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
-			struct in6_addr *addr)
+			const struct in6_addr *addr)
 {
 	int found = 0;
 
diff --git a/net/ipv6/esp6.c b/net/ipv6/esp6.c
index 59dccfbb5b1..1ac7938dd9e 100644
--- a/net/ipv6/esp6.c
+++ b/net/ipv6/esp6.c
@@ -430,7 +430,7 @@ static void esp6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
 		     u8 type, u8 code, int offset, __be32 info)
 {
 	struct net *net = dev_net(skb->dev);
-	struct ipv6hdr *iph = (struct ipv6hdr*)skb->data;
+	const struct ipv6hdr *iph = (const struct ipv6hdr *)skb->data;
 	struct ip_esp_hdr *esph = (struct ip_esp_hdr *)(skb->data + offset);
 	struct xfrm_state *x;
 
@@ -438,7 +438,8 @@ static void esp6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
 	    type != ICMPV6_PKT_TOOBIG)
 		return;
 
-	x = xfrm_state_lookup(net, skb->mark, (xfrm_address_t *)&iph->daddr, esph->spi, IPPROTO_ESP, AF_INET6);
+	x = xfrm_state_lookup(net, skb->mark, (const xfrm_address_t *)&iph->daddr,
+			      esph->spi, IPPROTO_ESP, AF_INET6);
 	if (!x)
 		return;
 	printk(KERN_DEBUG "pmtu discovery on SA ESP/%08x/%pI6\n",
diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c
index 83cb4f9add8..11900417b1c 100644
--- a/net/ipv6/icmp.c
+++ b/net/ipv6/icmp.c
@@ -372,7 +372,7 @@ void icmpv6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info)
 	struct ipv6hdr *hdr = ipv6_hdr(skb);
 	struct sock *sk;
 	struct ipv6_pinfo *np;
-	struct in6_addr *saddr = NULL;
+	const struct in6_addr *saddr = NULL;
 	struct dst_entry *dst;
 	struct icmp6hdr tmp_hdr;
 	struct flowi6 fl6;
@@ -521,7 +521,7 @@ static void icmpv6_echo_reply(struct sk_buff *skb)
 	struct sock *sk;
 	struct inet6_dev *idev;
 	struct ipv6_pinfo *np;
-	struct in6_addr *saddr = NULL;
+	const struct in6_addr *saddr = NULL;
 	struct icmp6hdr *icmph = icmp6_hdr(skb);
 	struct icmp6hdr tmp_hdr;
 	struct flowi6 fl6;
@@ -645,8 +645,8 @@ static int icmpv6_rcv(struct sk_buff *skb)
 {
 	struct net_device *dev = skb->dev;
 	struct inet6_dev *idev = __in6_dev_get(dev);
-	struct in6_addr *saddr, *daddr;
-	struct ipv6hdr *orig_hdr;
+	const struct in6_addr *saddr, *daddr;
+	const struct ipv6hdr *orig_hdr;
 	struct icmp6hdr *hdr;
 	u8 type;
 
diff --git a/net/ipv6/inet6_connection_sock.c b/net/ipv6/inet6_connection_sock.c
index f2c5b0fc0f2..8a58e8cf664 100644
--- a/net/ipv6/inet6_connection_sock.c
+++ b/net/ipv6/inet6_connection_sock.c
@@ -203,7 +203,7 @@ struct dst_entry *__inet6_csk_dst_check(struct sock *sk, u32 cookie)
 	return dst;
 }
 
-int inet6_csk_xmit(struct sk_buff *skb)
+int inet6_csk_xmit(struct sk_buff *skb, struct flowi *fl_unused)
 {
 	struct sock *sk = skb->sk;
 	struct inet_sock *inet = inet_sk(sk);
diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c
index 7548905e79e..4076a0b14b2 100644
--- a/net/ipv6/ip6_fib.c
+++ b/net/ipv6/ip6_fib.c
@@ -134,9 +134,9 @@ static __inline__ u32 fib6_new_sernum(void)
 # define BITOP_BE32_SWIZZLE	0
 #endif
 
-static __inline__ __be32 addr_bit_set(void *token, int fn_bit)
+static __inline__ __be32 addr_bit_set(const void *token, int fn_bit)
 {
-	__be32 *addr = token;
+	const __be32 *addr = token;
 	/*
 	 * Here,
 	 * 	1 << ((~fn_bit ^ BITOP_BE32_SWIZZLE) & 0x1f)
@@ -394,10 +394,11 @@ static int inet6_dump_fib(struct sk_buff *skb, struct netlink_callback *cb)
 	arg.net = net;
 	w->args = &arg;
 
+	rcu_read_lock();
 	for (h = s_h; h < FIB6_TABLE_HASHSZ; h++, s_e = 0) {
 		e = 0;
 		head = &net->ipv6.fib_table_hash[h];
-		hlist_for_each_entry(tb, node, head, tb6_hlist) {
+		hlist_for_each_entry_rcu(tb, node, head, tb6_hlist) {
 			if (e < s_e)
 				goto next;
 			res = fib6_dump_table(tb, skb, cb);
@@ -408,6 +409,7 @@ next:
 		}
 	}
 out:
+	rcu_read_unlock();
 	cb->args[1] = e;
 	cb->args[0] = h;
 
@@ -822,7 +824,7 @@ st_failure:
 
 struct lookup_args {
 	int		offset;		/* key offset on rt6_info	*/
-	struct in6_addr	*addr;		/* search key			*/
+	const struct in6_addr	*addr;		/* search key			*/
 };
 
 static struct fib6_node * fib6_lookup_1(struct fib6_node *root,
@@ -881,8 +883,8 @@ static struct fib6_node * fib6_lookup_1(struct fib6_node *root,
 	return NULL;
 }
 
-struct fib6_node * fib6_lookup(struct fib6_node *root, struct in6_addr *daddr,
-			       struct in6_addr *saddr)
+struct fib6_node * fib6_lookup(struct fib6_node *root, const struct in6_addr *daddr,
+			       const struct in6_addr *saddr)
 {
 	struct fib6_node *fn;
 	struct lookup_args args[] = {
@@ -916,7 +918,7 @@ struct fib6_node * fib6_lookup(struct fib6_node *root, struct in6_addr *daddr,
 
 
 static struct fib6_node * fib6_locate_1(struct fib6_node *root,
-					struct in6_addr *addr,
+					const struct in6_addr *addr,
 					int plen, int offset)
 {
 	struct fib6_node *fn;
@@ -946,8 +948,8 @@ static struct fib6_node * fib6_locate_1(struct fib6_node *root,
 }
 
 struct fib6_node * fib6_locate(struct fib6_node *root,
-			       struct in6_addr *daddr, int dst_len,
-			       struct in6_addr *saddr, int src_len)
+			       const struct in6_addr *daddr, int dst_len,
+			       const struct in6_addr *saddr, int src_len)
 {
 	struct fib6_node *fn;
 
diff --git a/net/ipv6/ip6_input.c b/net/ipv6/ip6_input.c
index a83e9209cec..027c7ff6f1e 100644
--- a/net/ipv6/ip6_input.c
+++ b/net/ipv6/ip6_input.c
@@ -57,7 +57,7 @@ inline int ip6_rcv_finish( struct sk_buff *skb)
 
 int ipv6_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
 {
-	struct ipv6hdr *hdr;
+	const struct ipv6hdr *hdr;
 	u32 		pkt_len;
 	struct inet6_dev *idev;
 	struct net *net = dev_net(skb->dev);
@@ -186,7 +186,7 @@ resubmit:
 		int ret;
 
 		if (ipprot->flags & INET6_PROTO_FINAL) {
-			struct ipv6hdr *hdr;
+			const struct ipv6hdr *hdr;
 
 			/* Free reference early: we don't need it any more,
 			   and it may hold ip_conntrack module loaded
@@ -242,7 +242,7 @@ int ip6_input(struct sk_buff *skb)
 
 int ip6_mc_input(struct sk_buff *skb)
 {
-	struct ipv6hdr *hdr;
+	const struct ipv6hdr *hdr;
 	int deliver;
 
 	IP6_UPD_PO_STATS_BH(dev_net(skb_dst(skb)->dev),
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 46cf7bea676..9d4b165837d 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -869,9 +869,9 @@ fail:
 	return err;
 }
 
-static inline int ip6_rt_check(struct rt6key *rt_key,
-			       struct in6_addr *fl_addr,
-			       struct in6_addr *addr_cache)
+static inline int ip6_rt_check(const struct rt6key *rt_key,
+			       const struct in6_addr *fl_addr,
+			       const struct in6_addr *addr_cache)
 {
 	return (rt_key->plen != 128 || !ipv6_addr_equal(fl_addr, &rt_key->addr)) &&
 		(addr_cache == NULL || !ipv6_addr_equal(fl_addr, addr_cache));
@@ -879,7 +879,7 @@ static inline int ip6_rt_check(struct rt6key *rt_key,
 
 static struct dst_entry *ip6_sk_dst_check(struct sock *sk,
 					  struct dst_entry *dst,
-					  struct flowi6 *fl6)
+					  const struct flowi6 *fl6)
 {
 	struct ipv6_pinfo *np = inet6_sk(sk);
 	struct rt6_info *rt = (struct rt6_info *)dst;
@@ -930,10 +930,10 @@ static int ip6_dst_lookup_tail(struct sock *sk,
 		goto out_err_release;
 
 	if (ipv6_addr_any(&fl6->saddr)) {
-		err = ipv6_dev_get_saddr(net, ip6_dst_idev(*dst)->dev,
-					 &fl6->daddr,
-					 sk ? inet6_sk(sk)->srcprefs : 0,
-					 &fl6->saddr);
+		struct rt6_info *rt = (struct rt6_info *) *dst;
+		err = ip6_route_get_saddr(net, rt, &fl6->daddr,
+					  sk ? inet6_sk(sk)->srcprefs : 0,
+					  &fl6->saddr);
 		if (err)
 			goto out_err_release;
 	}
@@ -1150,6 +1150,7 @@ int ip6_append_data(struct sock *sk, int getfrag(void *from, char *to,
 {
 	struct inet_sock *inet = inet_sk(sk);
 	struct ipv6_pinfo *np = inet6_sk(sk);
+	struct inet_cork *cork;
 	struct sk_buff *skb;
 	unsigned int maxfraglen, fragheaderlen;
 	int exthdrlen;
@@ -1163,6 +1164,7 @@ int ip6_append_data(struct sock *sk, int getfrag(void *from, char *to,
 
 	if (flags&MSG_PROBE)
 		return 0;
+	cork = &inet->cork.base;
 	if (skb_queue_empty(&sk->sk_write_queue)) {
 		/*
 		 * setup for corking
@@ -1202,7 +1204,7 @@ int ip6_append_data(struct sock *sk, int getfrag(void *from, char *to,
 			/* need source address above miyazawa*/
 		}
 		dst_hold(&rt->dst);
-		inet->cork.dst = &rt->dst;
+		cork->dst = &rt->dst;
 		inet->cork.fl.u.ip6 = *fl6;
 		np->cork.hop_limit = hlimit;
 		np->cork.tclass = tclass;
@@ -1212,10 +1214,10 @@ int ip6_append_data(struct sock *sk, int getfrag(void *from, char *to,
 			if (np->frag_size)
 				mtu = np->frag_size;
 		}
-		inet->cork.fragsize = mtu;
+		cork->fragsize = mtu;
 		if (dst_allfrag(rt->dst.path))
-			inet->cork.flags |= IPCORK_ALLFRAG;
-		inet->cork.length = 0;
+			cork->flags |= IPCORK_ALLFRAG;
+		cork->length = 0;
 		sk->sk_sndmsg_page = NULL;
 		sk->sk_sndmsg_off = 0;
 		exthdrlen = rt->dst.header_len + (opt ? opt->opt_flen : 0) -
@@ -1223,12 +1225,12 @@ int ip6_append_data(struct sock *sk, int getfrag(void *from, char *to,
 		length += exthdrlen;
 		transhdrlen += exthdrlen;
 	} else {
-		rt = (struct rt6_info *)inet->cork.dst;
+		rt = (struct rt6_info *)cork->dst;
 		fl6 = &inet->cork.fl.u.ip6;
 		opt = np->cork.opt;
 		transhdrlen = 0;
 		exthdrlen = 0;
-		mtu = inet->cork.fragsize;
+		mtu = cork->fragsize;
 	}
 
 	hh_len = LL_RESERVED_SPACE(rt->dst.dev);
@@ -1238,7 +1240,7 @@ int ip6_append_data(struct sock *sk, int getfrag(void *from, char *to,
 	maxfraglen = ((mtu - fragheaderlen) & ~7) + fragheaderlen - sizeof(struct frag_hdr);
 
 	if (mtu <= sizeof(struct ipv6hdr) + IPV6_MAXPLEN) {
-		if (inet->cork.length + length > sizeof(struct ipv6hdr) + IPV6_MAXPLEN - fragheaderlen) {
+		if (cork->length + length > sizeof(struct ipv6hdr) + IPV6_MAXPLEN - fragheaderlen) {
 			ipv6_local_error(sk, EMSGSIZE, fl6, mtu-exthdrlen);
 			return -EMSGSIZE;
 		}
@@ -1267,7 +1269,7 @@ int ip6_append_data(struct sock *sk, int getfrag(void *from, char *to,
 	 * --yoshfuji
 	 */
 
-	inet->cork.length += length;
+	cork->length += length;
 	if (length > mtu) {
 		int proto = sk->sk_protocol;
 		if (dontfrag && (proto == IPPROTO_UDP || proto == IPPROTO_RAW)){
@@ -1292,7 +1294,7 @@ int ip6_append_data(struct sock *sk, int getfrag(void *from, char *to,
 
 	while (length > 0) {
 		/* Check if the remaining data fits into current packet. */
-		copy = (inet->cork.length <= mtu && !(inet->cork.flags & IPCORK_ALLFRAG) ? mtu : maxfraglen) - skb->len;
+		copy = (cork->length <= mtu && !(cork->flags & IPCORK_ALLFRAG) ? mtu : maxfraglen) - skb->len;
 		if (copy < length)
 			copy = maxfraglen - skb->len;
 
@@ -1317,7 +1319,7 @@ alloc_new_skb:
 			 * we know we need more fragment(s).
 			 */
 			datalen = length + fraggap;
-			if (datalen > (inet->cork.length <= mtu && !(inet->cork.flags & IPCORK_ALLFRAG) ? mtu : maxfraglen) - fragheaderlen)
+			if (datalen > (cork->length <= mtu && !(cork->flags & IPCORK_ALLFRAG) ? mtu : maxfraglen) - fragheaderlen)
 				datalen = maxfraglen - fragheaderlen;
 
 			fraglen = datalen + fragheaderlen;
@@ -1481,7 +1483,7 @@ alloc_new_skb:
 	}
 	return 0;
 error:
-	inet->cork.length -= length;
+	cork->length -= length;
 	IP6_INC_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
 	return err;
 }
@@ -1497,10 +1499,10 @@ static void ip6_cork_release(struct inet_sock *inet, struct ipv6_pinfo *np)
 		np->cork.opt = NULL;
 	}
 
-	if (inet->cork.dst) {
-		dst_release(inet->cork.dst);
-		inet->cork.dst = NULL;
-		inet->cork.flags &= ~IPCORK_ALLFRAG;
+	if (inet->cork.base.dst) {
+		dst_release(inet->cork.base.dst);
+		inet->cork.base.dst = NULL;
+		inet->cork.base.flags &= ~IPCORK_ALLFRAG;
 	}
 	memset(&inet->cork.fl, 0, sizeof(inet->cork.fl));
 }
@@ -1515,7 +1517,7 @@ int ip6_push_pending_frames(struct sock *sk)
 	struct net *net = sock_net(sk);
 	struct ipv6hdr *hdr;
 	struct ipv6_txoptions *opt = np->cork.opt;
-	struct rt6_info *rt = (struct rt6_info *)inet->cork.dst;
+	struct rt6_info *rt = (struct rt6_info *)inet->cork.base.dst;
 	struct flowi6 *fl6 = &inet->cork.fl.u.ip6;
 	unsigned char proto = fl6->flowi6_proto;
 	int err = 0;
diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
index c1b1bd312df..36c2842a86b 100644
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -162,7 +162,7 @@ static inline void ip6_tnl_dst_store(struct ip6_tnl *t, struct dst_entry *dst)
 	for (t = rcu_dereference(start); t; t = rcu_dereference(t->next))
 
 static struct ip6_tnl *
-ip6_tnl_lookup(struct net *net, struct in6_addr *remote, struct in6_addr *local)
+ip6_tnl_lookup(struct net *net, const struct in6_addr *remote, const struct in6_addr *local)
 {
 	unsigned int h0 = HASH(remote);
 	unsigned int h1 = HASH(local);
@@ -194,10 +194,10 @@ ip6_tnl_lookup(struct net *net, struct in6_addr *remote, struct in6_addr *local)
  **/
 
 static struct ip6_tnl __rcu **
-ip6_tnl_bucket(struct ip6_tnl_net *ip6n, struct ip6_tnl_parm *p)
+ip6_tnl_bucket(struct ip6_tnl_net *ip6n, const struct ip6_tnl_parm *p)
 {
-	struct in6_addr *remote = &p->raddr;
-	struct in6_addr *local = &p->laddr;
+	const struct in6_addr *remote = &p->raddr;
+	const struct in6_addr *local = &p->laddr;
 	unsigned h = 0;
 	int prio = 0;
 
@@ -280,11 +280,6 @@ static struct ip6_tnl *ip6_tnl_create(struct net *net, struct ip6_tnl_parm *p)
 
 	dev_net_set(dev, net);
 
-	if (strchr(name, '%')) {
-		if (dev_alloc_name(dev, name) < 0)
-			goto failed_free;
-	}
-
 	t = netdev_priv(dev);
 	t->parms = *p;
 	err = ip6_tnl_dev_init(dev);
@@ -321,8 +316,8 @@ failed:
 static struct ip6_tnl *ip6_tnl_locate(struct net *net,
 		struct ip6_tnl_parm *p, int create)
 {
-	struct in6_addr *remote = &p->raddr;
-	struct in6_addr *local = &p->laddr;
+	const struct in6_addr *remote = &p->raddr;
+	const struct in6_addr *local = &p->laddr;
 	struct ip6_tnl __rcu **tp;
 	struct ip6_tnl *t;
 	struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id);
@@ -374,7 +369,7 @@ ip6_tnl_dev_uninit(struct net_device *dev)
 static __u16
 parse_tlv_tnl_enc_lim(struct sk_buff *skb, __u8 * raw)
 {
-	struct ipv6hdr *ipv6h = (struct ipv6hdr *) raw;
+	const struct ipv6hdr *ipv6h = (const struct ipv6hdr *) raw;
 	__u8 nexthdr = ipv6h->nexthdr;
 	__u16 off = sizeof (*ipv6h);
 
@@ -435,7 +430,7 @@ static int
 ip6_tnl_err(struct sk_buff *skb, __u8 ipproto, struct inet6_skb_parm *opt,
 	    u8 *type, u8 *code, int *msg, __u32 *info, int offset)
 {
-	struct ipv6hdr *ipv6h = (struct ipv6hdr *) skb->data;
+	const struct ipv6hdr *ipv6h = (const struct ipv6hdr *) skb->data;
 	struct ip6_tnl *t;
 	int rel_msg = 0;
 	u8 rel_type = ICMPV6_DEST_UNREACH;
@@ -535,8 +530,9 @@ ip4ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
 	__u32 rel_info = ntohl(info);
 	int err;
 	struct sk_buff *skb2;
-	struct iphdr *eiph;
+	const struct iphdr *eiph;
 	struct rtable *rt;
+	struct flowi4 fl4;
 
 	err = ip6_tnl_err(skb, IPPROTO_IPIP, opt, &rel_type, &rel_code,
 			  &rel_msg, &rel_info, offset);
@@ -577,7 +573,7 @@ ip4ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
 	eiph = ip_hdr(skb2);
 
 	/* Try to guess incoming interface */
-	rt = ip_route_output_ports(dev_net(skb->dev), NULL,
+	rt = ip_route_output_ports(dev_net(skb->dev), &fl4, NULL,
 				   eiph->saddr, 0,
 				   0, 0,
 				   IPPROTO_IPIP, RT_TOS(eiph->tos), 0);
@@ -590,7 +586,7 @@ ip4ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
 	if (rt->rt_flags & RTCF_LOCAL) {
 		ip_rt_put(rt);
 		rt = NULL;
-		rt = ip_route_output_ports(dev_net(skb->dev), NULL,
+		rt = ip_route_output_ports(dev_net(skb->dev), &fl4, NULL,
 					   eiph->daddr, eiph->saddr,
 					   0, 0,
 					   IPPROTO_IPIP,
@@ -669,8 +665,8 @@ ip6ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
 	return 0;
 }
 
-static void ip4ip6_dscp_ecn_decapsulate(struct ip6_tnl *t,
-					struct ipv6hdr *ipv6h,
+static void ip4ip6_dscp_ecn_decapsulate(const struct ip6_tnl *t,
+					const struct ipv6hdr *ipv6h,
 					struct sk_buff *skb)
 {
 	__u8 dsfield = ipv6_get_dsfield(ipv6h) & ~INET_ECN_MASK;
@@ -682,8 +678,8 @@ static void ip4ip6_dscp_ecn_decapsulate(struct ip6_tnl *t,
 		IP_ECN_set_ce(ip_hdr(skb));
 }
 
-static void ip6ip6_dscp_ecn_decapsulate(struct ip6_tnl *t,
-					struct ipv6hdr *ipv6h,
+static void ip6ip6_dscp_ecn_decapsulate(const struct ip6_tnl *t,
+					const struct ipv6hdr *ipv6h,
 					struct sk_buff *skb)
 {
 	if (t->parms.flags & IP6_TNL_F_RCV_DSCP_COPY)
@@ -726,12 +722,12 @@ static inline int ip6_tnl_rcv_ctl(struct ip6_tnl *t)
 
 static int ip6_tnl_rcv(struct sk_buff *skb, __u16 protocol,
 		       __u8 ipproto,
-		       void (*dscp_ecn_decapsulate)(struct ip6_tnl *t,
-						    struct ipv6hdr *ipv6h,
+		       void (*dscp_ecn_decapsulate)(const struct ip6_tnl *t,
+						    const struct ipv6hdr *ipv6h,
 						    struct sk_buff *skb))
 {
 	struct ip6_tnl *t;
-	struct ipv6hdr *ipv6h = ipv6_hdr(skb);
+	const struct ipv6hdr *ipv6h = ipv6_hdr(skb);
 
 	rcu_read_lock();
 
@@ -828,7 +824,7 @@ static void init_tel_txopt(struct ipv6_tel_txoption *opt, __u8 encap_limit)
  **/
 
 static inline int
-ip6_tnl_addr_conflict(struct ip6_tnl *t, struct ipv6hdr *hdr)
+ip6_tnl_addr_conflict(const struct ip6_tnl *t, const struct ipv6hdr *hdr)
 {
 	return ipv6_addr_equal(&t->parms.raddr, &hdr->saddr);
 }
@@ -1005,7 +1001,7 @@ static inline int
 ip4ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev)
 {
 	struct ip6_tnl *t = netdev_priv(dev);
-	struct iphdr  *iph = ip_hdr(skb);
+	const struct iphdr  *iph = ip_hdr(skb);
 	int encap_limit = -1;
 	struct flowi6 fl6;
 	__u8 dsfield;
diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
index 29e48593bf2..82a809901f8 100644
--- a/net/ipv6/ip6mr.c
+++ b/net/ipv6/ip6mr.c
@@ -989,8 +989,8 @@ static int mif6_add(struct net *net, struct mr6_table *mrt,
 }
 
 static struct mfc6_cache *ip6mr_cache_find(struct mr6_table *mrt,
-					   struct in6_addr *origin,
-					   struct in6_addr *mcastgrp)
+					   const struct in6_addr *origin,
+					   const struct in6_addr *mcastgrp)
 {
 	int line = MFC6_HASH(mcastgrp, origin);
 	struct mfc6_cache *c;
diff --git a/net/ipv6/ipcomp6.c b/net/ipv6/ipcomp6.c
index 85cccd6ed0b..bba658d9a03 100644
--- a/net/ipv6/ipcomp6.c
+++ b/net/ipv6/ipcomp6.c
@@ -55,7 +55,7 @@ static void ipcomp6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
 {
 	struct net *net = dev_net(skb->dev);
 	__be32 spi;
-	struct ipv6hdr *iph = (struct ipv6hdr*)skb->data;
+	const struct ipv6hdr *iph = (const struct ipv6hdr *)skb->data;
 	struct ip_comp_hdr *ipcomph =
 		(struct ip_comp_hdr *)(skb->data + offset);
 	struct xfrm_state *x;
@@ -64,7 +64,8 @@ static void ipcomp6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
 		return;
 
 	spi = htonl(ntohs(ipcomph->cpi));
-	x = xfrm_state_lookup(net, skb->mark, (xfrm_address_t *)&iph->daddr, spi, IPPROTO_COMP, AF_INET6);
+	x = xfrm_state_lookup(net, skb->mark, (const xfrm_address_t *)&iph->daddr,
+			      spi, IPPROTO_COMP, AF_INET6);
 	if (!x)
 		return;
 
diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c
index f2d98ca7588..3e6ebcdb477 100644
--- a/net/ipv6/mcast.c
+++ b/net/ipv6/mcast.c
@@ -92,16 +92,16 @@ static void mld_gq_timer_expire(unsigned long data);
 static void mld_ifc_timer_expire(unsigned long data);
 static void mld_ifc_event(struct inet6_dev *idev);
 static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *pmc);
-static void mld_del_delrec(struct inet6_dev *idev, struct in6_addr *addr);
+static void mld_del_delrec(struct inet6_dev *idev, const struct in6_addr *addr);
 static void mld_clear_delrec(struct inet6_dev *idev);
 static int sf_setstate(struct ifmcaddr6 *pmc);
 static void sf_markstate(struct ifmcaddr6 *pmc);
 static void ip6_mc_clear_src(struct ifmcaddr6 *pmc);
-static int ip6_mc_del_src(struct inet6_dev *idev, struct in6_addr *pmca,
-			  int sfmode, int sfcount, struct in6_addr *psfsrc,
+static int ip6_mc_del_src(struct inet6_dev *idev, const struct in6_addr *pmca,
+			  int sfmode, int sfcount, const struct in6_addr *psfsrc,
 			  int delta);
-static int ip6_mc_add_src(struct inet6_dev *idev, struct in6_addr *pmca,
-			  int sfmode, int sfcount, struct in6_addr *psfsrc,
+static int ip6_mc_add_src(struct inet6_dev *idev, const struct in6_addr *pmca,
+			  int sfmode, int sfcount, const struct in6_addr *psfsrc,
 			  int delta);
 static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml,
 			    struct inet6_dev *idev);
@@ -246,7 +246,7 @@ int ipv6_sock_mc_drop(struct sock *sk, int ifindex, const struct in6_addr *addr)
 
 /* called with rcu_read_lock() */
 static struct inet6_dev *ip6_mc_find_dev_rcu(struct net *net,
-					     struct in6_addr *group,
+					     const struct in6_addr *group,
 					     int ifindex)
 {
 	struct net_device *dev = NULL;
@@ -447,7 +447,7 @@ done:
 
 int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf)
 {
-	struct in6_addr *group;
+	const struct in6_addr *group;
 	struct ipv6_mc_socklist *pmc;
 	struct inet6_dev *idev;
 	struct ipv6_pinfo *inet6 = inet6_sk(sk);
@@ -538,7 +538,7 @@ int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
 	struct group_filter __user *optval, int __user *optlen)
 {
 	int err, i, count, copycount;
-	struct in6_addr *group;
+	const struct in6_addr *group;
 	struct ipv6_mc_socklist *pmc;
 	struct inet6_dev *idev;
 	struct ipv6_pinfo *inet6 = inet6_sk(sk);
@@ -748,7 +748,7 @@ static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im)
 	spin_unlock_bh(&idev->mc_lock);
 }
 
-static void mld_del_delrec(struct inet6_dev *idev, struct in6_addr *pmca)
+static void mld_del_delrec(struct inet6_dev *idev, const struct in6_addr *pmca)
 {
 	struct ifmcaddr6 *pmc, *pmc_prev;
 	struct ip6_sf_list *psf, *psf_next;
@@ -1048,7 +1048,7 @@ static void igmp6_group_queried(struct ifmcaddr6 *ma, unsigned long resptime)
 
 /* mark EXCLUDE-mode sources */
 static int mld_xmarksources(struct ifmcaddr6 *pmc, int nsrcs,
-	struct in6_addr *srcs)
+	const struct in6_addr *srcs)
 {
 	struct ip6_sf_list *psf;
 	int i, scount;
@@ -1076,7 +1076,7 @@ static int mld_xmarksources(struct ifmcaddr6 *pmc, int nsrcs,
 }
 
 static int mld_marksources(struct ifmcaddr6 *pmc, int nsrcs,
-	struct in6_addr *srcs)
+	const struct in6_addr *srcs)
 {
 	struct ip6_sf_list *psf;
 	int i, scount;
@@ -1111,7 +1111,7 @@ int igmp6_event_query(struct sk_buff *skb)
 {
 	struct mld2_query *mlh2 = NULL;
 	struct ifmcaddr6 *ma;
-	struct in6_addr *group;
+	const struct in6_addr *group;
 	unsigned long max_delay;
 	struct inet6_dev *idev;
 	struct mld_msg *mld;
@@ -1817,7 +1817,7 @@ err_out:
 }
 
 static int ip6_mc_del1_src(struct ifmcaddr6 *pmc, int sfmode,
-	struct in6_addr *psfsrc)
+	const struct in6_addr *psfsrc)
 {
 	struct ip6_sf_list *psf, *psf_prev;
 	int rv = 0;
@@ -1853,8 +1853,8 @@ static int ip6_mc_del1_src(struct ifmcaddr6 *pmc, int sfmode,
 	return rv;
 }
 
-static int ip6_mc_del_src(struct inet6_dev *idev, struct in6_addr *pmca,
-			  int sfmode, int sfcount, struct in6_addr *psfsrc,
+static int ip6_mc_del_src(struct inet6_dev *idev, const struct in6_addr *pmca,
+			  int sfmode, int sfcount, const struct in6_addr *psfsrc,
 			  int delta)
 {
 	struct ifmcaddr6 *pmc;
@@ -1914,7 +1914,7 @@ static int ip6_mc_del_src(struct inet6_dev *idev, struct in6_addr *pmca,
  * Add multicast single-source filter to the interface list
  */
 static int ip6_mc_add1_src(struct ifmcaddr6 *pmc, int sfmode,
-	struct in6_addr *psfsrc, int delta)
+	const struct in6_addr *psfsrc, int delta)
 {
 	struct ip6_sf_list *psf, *psf_prev;
 
@@ -2017,8 +2017,8 @@ static int sf_setstate(struct ifmcaddr6 *pmc)
 /*
  * Add multicast source filter list to the interface list
  */
-static int ip6_mc_add_src(struct inet6_dev *idev, struct in6_addr *pmca,
-			  int sfmode, int sfcount, struct in6_addr *psfsrc,
+static int ip6_mc_add_src(struct inet6_dev *idev, const struct in6_addr *pmca,
+			  int sfmode, int sfcount, const struct in6_addr *psfsrc,
 			  int delta)
 {
 	struct ifmcaddr6 *pmc;
diff --git a/net/ipv6/mip6.c b/net/ipv6/mip6.c
index 9b210482fb0..43242e6e610 100644
--- a/net/ipv6/mip6.c
+++ b/net/ipv6/mip6.c
@@ -126,7 +126,7 @@ static struct mip6_report_rate_limiter mip6_report_rl = {
 
 static int mip6_destopt_input(struct xfrm_state *x, struct sk_buff *skb)
 {
-	struct ipv6hdr *iph = ipv6_hdr(skb);
+	const struct ipv6hdr *iph = ipv6_hdr(skb);
 	struct ipv6_destopt_hdr *destopt = (struct ipv6_destopt_hdr *)skb->data;
 	int err = destopt->nexthdr;
 
@@ -181,8 +181,8 @@ static int mip6_destopt_output(struct xfrm_state *x, struct sk_buff *skb)
 }
 
 static inline int mip6_report_rl_allow(struct timeval *stamp,
-				       struct in6_addr *dst,
-				       struct in6_addr *src, int iif)
+				       const struct in6_addr *dst,
+				       const struct in6_addr *src, int iif)
 {
 	int allow = 0;
 
@@ -349,7 +349,7 @@ static const struct xfrm_type mip6_destopt_type =
 
 static int mip6_rthdr_input(struct xfrm_state *x, struct sk_buff *skb)
 {
-	struct ipv6hdr *iph = ipv6_hdr(skb);
+	const struct ipv6hdr *iph = ipv6_hdr(skb);
 	struct rt2_hdr *rt2 = (struct rt2_hdr *)skb->data;
 	int err = rt2->rt_hdr.nexthdr;
 
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index 92f952d093d..7596f071d30 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -324,7 +324,7 @@ static inline u8 *ndisc_opt_addr_data(struct nd_opt_hdr *p,
 	return lladdr + prepad;
 }
 
-int ndisc_mc_map(struct in6_addr *addr, char *buf, struct net_device *dev, int dir)
+int ndisc_mc_map(const struct in6_addr *addr, char *buf, struct net_device *dev, int dir)
 {
 	switch (dev->type) {
 	case ARPHRD_ETHER:
@@ -611,6 +611,29 @@ static void ndisc_send_na(struct net_device *dev, struct neighbour *neigh,
 		     inc_opt ? ND_OPT_TARGET_LL_ADDR : 0);
 }
 
+static void ndisc_send_unsol_na(struct net_device *dev)
+{
+	struct inet6_dev *idev;
+	struct inet6_ifaddr *ifa;
+	struct in6_addr mcaddr;
+
+	idev = in6_dev_get(dev);
+	if (!idev)
+		return;
+
+	read_lock_bh(&idev->lock);
+	list_for_each_entry(ifa, &idev->addr_list, if_list) {
+		addrconf_addr_solict_mult(&ifa->addr, &mcaddr);
+		ndisc_send_na(dev, NULL, &mcaddr, &ifa->addr,
+			      /*router=*/ !!idev->cnf.forwarding,
+			      /*solicited=*/ false, /*override=*/ true,
+			      /*inc_opt=*/ true);
+	}
+	read_unlock_bh(&idev->lock);
+
+	in6_dev_put(idev);
+}
+
 void ndisc_send_ns(struct net_device *dev, struct neighbour *neigh,
 		   const struct in6_addr *solicit,
 		   const struct in6_addr *daddr, const struct in6_addr *saddr)
@@ -725,8 +748,8 @@ static int pndisc_is_router(const void *pkey,
 static void ndisc_recv_ns(struct sk_buff *skb)
 {
 	struct nd_msg *msg = (struct nd_msg *)skb_transport_header(skb);
-	struct in6_addr *saddr = &ipv6_hdr(skb)->saddr;
-	struct in6_addr *daddr = &ipv6_hdr(skb)->daddr;
+	const struct in6_addr *saddr = &ipv6_hdr(skb)->saddr;
+	const struct in6_addr *daddr = &ipv6_hdr(skb)->daddr;
 	u8 *lladdr = NULL;
 	u32 ndoptlen = skb->tail - (skb->transport_header +
 				    offsetof(struct nd_msg, opt));
@@ -901,8 +924,8 @@ out:
 static void ndisc_recv_na(struct sk_buff *skb)
 {
 	struct nd_msg *msg = (struct nd_msg *)skb_transport_header(skb);
-	struct in6_addr *saddr = &ipv6_hdr(skb)->saddr;
-	struct in6_addr *daddr = &ipv6_hdr(skb)->daddr;
+	const struct in6_addr *saddr = &ipv6_hdr(skb)->saddr;
+	const struct in6_addr *daddr = &ipv6_hdr(skb)->daddr;
 	u8 *lladdr = NULL;
 	u32 ndoptlen = skb->tail - (skb->transport_header +
 				    offsetof(struct nd_msg, opt));
@@ -945,9 +968,10 @@ static void ndisc_recv_na(struct sk_buff *skb)
 	}
 	ifp = ipv6_get_ifaddr(dev_net(dev), &msg->target, dev, 1);
 	if (ifp) {
-		if (ifp->flags & IFA_F_TENTATIVE) {
-			addrconf_dad_failure(ifp);
-			return;
+		if (skb->pkt_type != PACKET_LOOPBACK
+		    && (ifp->flags & IFA_F_TENTATIVE)) {
+				addrconf_dad_failure(ifp);
+				return;
 		}
 		/* What should we make now? The advertisement
 		   is invalid, but ndisc specs say nothing
@@ -1014,7 +1038,7 @@ static void ndisc_recv_rs(struct sk_buff *skb)
 	unsigned long ndoptlen = skb->len - sizeof(*rs_msg);
 	struct neighbour *neigh;
 	struct inet6_dev *idev;
-	struct in6_addr *saddr = &ipv6_hdr(skb)->saddr;
+	const struct in6_addr *saddr = &ipv6_hdr(skb)->saddr;
 	struct ndisc_options ndopts;
 	u8 *lladdr = NULL;
 
@@ -1411,8 +1435,8 @@ static void ndisc_redirect_rcv(struct sk_buff *skb)
 {
 	struct inet6_dev *in6_dev;
 	struct icmp6hdr *icmph;
-	struct in6_addr *dest;
-	struct in6_addr *target;	/* new first hop to destination */
+	const struct in6_addr *dest;
+	const struct in6_addr *target;	/* new first hop to destination */
 	struct neighbour *neigh;
 	int on_link = 0;
 	struct ndisc_options ndopts;
@@ -1445,7 +1469,7 @@ static void ndisc_redirect_rcv(struct sk_buff *skb)
 	}
 
 	icmph = icmp6_hdr(skb);
-	target = (struct in6_addr *) (icmph + 1);
+	target = (const struct in6_addr *) (icmph + 1);
 	dest = target + 1;
 
 	if (ipv6_addr_is_multicast(dest)) {
@@ -1722,6 +1746,9 @@ static int ndisc_netdev_event(struct notifier_block *this, unsigned long event,
 		neigh_ifdown(&nd_tbl, dev);
 		fib6_run_gc(~0UL, net);
 		break;
+	case NETDEV_NOTIFY_PEERS:
+		ndisc_send_unsol_na(dev);
+		break;
 	default:
 		break;
 	}
diff --git a/net/ipv6/netfilter.c b/net/ipv6/netfilter.c
index 28bc1f644b7..30fcee46544 100644
--- a/net/ipv6/netfilter.c
+++ b/net/ipv6/netfilter.c
@@ -13,7 +13,7 @@
 int ip6_route_me_harder(struct sk_buff *skb)
 {
 	struct net *net = dev_net(skb_dst(skb)->dev);
-	struct ipv6hdr *iph = ipv6_hdr(skb);
+	const struct ipv6hdr *iph = ipv6_hdr(skb);
 	struct dst_entry *dst;
 	struct flowi6 fl6 = {
 		.flowi6_oif = skb->sk ? skb->sk->sk_bound_dev_if : 0,
@@ -67,7 +67,7 @@ static void nf_ip6_saveroute(const struct sk_buff *skb,
 	struct ip6_rt_info *rt_info = nf_queue_entry_reroute(entry);
 
 	if (entry->hook == NF_INET_LOCAL_OUT) {
-		struct ipv6hdr *iph = ipv6_hdr(skb);
+		const struct ipv6hdr *iph = ipv6_hdr(skb);
 
 		rt_info->daddr = iph->daddr;
 		rt_info->saddr = iph->saddr;
@@ -81,7 +81,7 @@ static int nf_ip6_reroute(struct sk_buff *skb,
 	struct ip6_rt_info *rt_info = nf_queue_entry_reroute(entry);
 
 	if (entry->hook == NF_INET_LOCAL_OUT) {
-		struct ipv6hdr *iph = ipv6_hdr(skb);
+		const struct ipv6hdr *iph = ipv6_hdr(skb);
 		if (!ipv6_addr_equal(&iph->daddr, &rt_info->daddr) ||
 		    !ipv6_addr_equal(&iph->saddr, &rt_info->saddr) ||
 		    skb->mark != rt_info->mark)
@@ -108,7 +108,7 @@ static int nf_ip6_route(struct net *net, struct dst_entry **dst,
 __sum16 nf_ip6_checksum(struct sk_buff *skb, unsigned int hook,
 			     unsigned int dataoff, u_int8_t protocol)
 {
-	struct ipv6hdr *ip6h = ipv6_hdr(skb);
+	const struct ipv6hdr *ip6h = ipv6_hdr(skb);
 	__sum16 csum = 0;
 
 	switch (skb->ip_summed) {
@@ -142,7 +142,7 @@ static __sum16 nf_ip6_checksum_partial(struct sk_buff *skb, unsigned int hook,
 				       unsigned int dataoff, unsigned int len,
 				       u_int8_t protocol)
 {
-	struct ipv6hdr *ip6h = ipv6_hdr(skb);
+	const struct ipv6hdr *ip6h = ipv6_hdr(skb);
 	__wsum hsum;
 	__sum16 csum = 0;
 
diff --git a/net/ipv6/netfilter/ip6_tables.c b/net/ipv6/netfilter/ip6_tables.c
index 5a1c6f27ffa..94874b0bdcd 100644
--- a/net/ipv6/netfilter/ip6_tables.c
+++ b/net/ipv6/netfilter/ip6_tables.c
@@ -340,6 +340,7 @@ ip6t_do_table(struct sk_buff *skb,
 	unsigned int *stackptr, origptr, cpu;
 	const struct xt_table_info *private;
 	struct xt_action_param acpar;
+	unsigned int addend;
 
 	/* Initialization */
 	indev = in ? in->name : nulldevname;
@@ -358,7 +359,8 @@ ip6t_do_table(struct sk_buff *skb,
 
 	IP_NF_ASSERT(table->valid_hooks & (1 << hook));
 
-	xt_info_rdlock_bh();
+	local_bh_disable();
+	addend = xt_write_recseq_begin();
 	private = table->private;
 	cpu        = smp_processor_id();
 	table_base = private->entries[cpu];
@@ -442,7 +444,9 @@ ip6t_do_table(struct sk_buff *skb,
 	} while (!acpar.hotdrop);
 
 	*stackptr = origptr;
-	xt_info_rdunlock_bh();
+
+ 	xt_write_recseq_end(addend);
+ 	local_bh_enable();
 
 #ifdef DEBUG_ALLOW_ALL
 	return NF_ACCEPT;
@@ -899,7 +903,7 @@ get_counters(const struct xt_table_info *t,
 	unsigned int i;
 
 	for_each_possible_cpu(cpu) {
-		seqlock_t *lock = &per_cpu(xt_info_locks, cpu).lock;
+		seqcount_t *s = &per_cpu(xt_recseq, cpu);
 
 		i = 0;
 		xt_entry_foreach(iter, t->entries[cpu], t->size) {
@@ -907,10 +911,10 @@ get_counters(const struct xt_table_info *t,
 			unsigned int start;
 
 			do {
-				start = read_seqbegin(lock);
+				start = read_seqcount_begin(s);
 				bcnt = iter->counters.bcnt;
 				pcnt = iter->counters.pcnt;
-			} while (read_seqretry(lock, start));
+			} while (read_seqcount_retry(s, start));
 
 			ADD_COUNTER(counters[i], bcnt, pcnt);
 			++i;
@@ -1325,6 +1329,7 @@ do_add_counters(struct net *net, const void __user *user, unsigned int len,
 	int ret = 0;
 	const void *loc_cpu_entry;
 	struct ip6t_entry *iter;
+	unsigned int addend;
 #ifdef CONFIG_COMPAT
 	struct compat_xt_counters_info compat_tmp;
 
@@ -1381,13 +1386,13 @@ do_add_counters(struct net *net, const void __user *user, unsigned int len,
 	i = 0;
 	/* Choose the copy that is on our node */
 	curcpu = smp_processor_id();
-	xt_info_wrlock(curcpu);
+	addend = xt_write_recseq_begin();
 	loc_cpu_entry = private->entries[curcpu];
 	xt_entry_foreach(iter, loc_cpu_entry, private->size) {
 		ADD_COUNTER(iter->counters, paddc[i].bcnt, paddc[i].pcnt);
 		++i;
 	}
-	xt_info_wrunlock(curcpu);
+	xt_write_recseq_end(addend);
 
  unlock_up_free:
 	local_bh_enable();
@@ -1578,7 +1583,6 @@ compat_copy_entry_from_user(struct compat_ip6t_entry *e, void **dstptr,
 			    struct xt_table_info *newinfo, unsigned char *base)
 {
 	struct xt_entry_target *t;
-	struct xt_target *target;
 	struct ip6t_entry *de;
 	unsigned int origsize;
 	int ret, h;
@@ -1600,7 +1604,6 @@ compat_copy_entry_from_user(struct compat_ip6t_entry *e, void **dstptr,
 	}
 	de->target_offset = e->target_offset - (origsize - *size);
 	t = compat_ip6t_get_target(e);
-	target = t->u.kernel.target;
 	xt_compat_target_from_user(t, dstptr, size);
 
 	de->next_offset = e->next_offset - (origsize - *size);
diff --git a/net/ipv6/netfilter/ip6table_mangle.c b/net/ipv6/netfilter/ip6table_mangle.c
index 679a0a3b7b3..00d19173db7 100644
--- a/net/ipv6/netfilter/ip6table_mangle.c
+++ b/net/ipv6/netfilter/ip6table_mangle.c
@@ -64,7 +64,8 @@ ip6t_mangle_out(struct sk_buff *skb, const struct net_device *out)
 	    (memcmp(&ipv6_hdr(skb)->saddr, &saddr, sizeof(saddr)) ||
 	     memcmp(&ipv6_hdr(skb)->daddr, &daddr, sizeof(daddr)) ||
 	     skb->mark != mark ||
-	     ipv6_hdr(skb)->hop_limit != hop_limit))
+	     ipv6_hdr(skb)->hop_limit != hop_limit ||
+	     flowlabel != *((u_int32_t *)ipv6_hdr(skb))))
 		return ip6_route_me_harder(skb) == 0 ? ret : NF_DROP;
 
 	return ret;
diff --git a/net/ipv6/proc.c b/net/ipv6/proc.c
index 24b3558b8e6..18ff5df7ec0 100644
--- a/net/ipv6/proc.c
+++ b/net/ipv6/proc.c
@@ -141,7 +141,11 @@ static const struct snmp_mib snmp6_udplite6_list[] = {
 	SNMP_MIB_SENTINEL
 };
 
-static void snmp6_seq_show_icmpv6msg(struct seq_file *seq, void __percpu **mib)
+/* can be called either with percpu mib (pcpumib != NULL),
+ * or shared one (smib != NULL)
+ */
+static void snmp6_seq_show_icmpv6msg(struct seq_file *seq, void __percpu **pcpumib,
+				     atomic_long_t *smib)
 {
 	char name[32];
 	int i;
@@ -158,14 +162,14 @@ static void snmp6_seq_show_icmpv6msg(struct seq_file *seq, void __percpu **mib)
 		snprintf(name, sizeof(name), "Icmp6%s%s",
 			i & 0x100 ? "Out" : "In", p);
 		seq_printf(seq, "%-32s\t%lu\n", name,
-			snmp_fold_field(mib, i));
+			pcpumib ? snmp_fold_field(pcpumib, i) : atomic_long_read(smib + i));
 	}
 
 	/* print by number (nonzero only) - ICMPMsgStat format */
 	for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
 		unsigned long val;
 
-		val = snmp_fold_field(mib, i);
+		val = pcpumib ? snmp_fold_field(pcpumib, i) : atomic_long_read(smib + i);
 		if (!val)
 			continue;
 		snprintf(name, sizeof(name), "Icmp6%sType%u",
@@ -174,14 +178,22 @@ static void snmp6_seq_show_icmpv6msg(struct seq_file *seq, void __percpu **mib)
 	}
 }
 
-static void snmp6_seq_show_item(struct seq_file *seq, void __percpu **mib,
+/* can be called either with percpu mib (pcpumib != NULL),
+ * or shared one (smib != NULL)
+ */
+static void snmp6_seq_show_item(struct seq_file *seq, void __percpu **pcpumib,
+				atomic_long_t *smib,
 				const struct snmp_mib *itemlist)
 {
 	int i;
+	unsigned long val;
 
-	for (i = 0; itemlist[i].name; i++)
-		seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name,
-			   snmp_fold_field(mib, itemlist[i].entry));
+	for (i = 0; itemlist[i].name; i++) {
+		val = pcpumib ?
+			snmp_fold_field(pcpumib, itemlist[i].entry) :
+			atomic_long_read(smib + itemlist[i].entry);
+		seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name, val);
+	}
 }
 
 static void snmp6_seq_show_item64(struct seq_file *seq, void __percpu **mib,
@@ -201,13 +213,13 @@ static int snmp6_seq_show(struct seq_file *seq, void *v)
 	snmp6_seq_show_item64(seq, (void __percpu **)net->mib.ipv6_statistics,
 			    snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp));
 	snmp6_seq_show_item(seq, (void __percpu **)net->mib.icmpv6_statistics,
-			    snmp6_icmp6_list);
+			    NULL, snmp6_icmp6_list);
 	snmp6_seq_show_icmpv6msg(seq,
-			    (void __percpu **)net->mib.icmpv6msg_statistics);
+			    (void __percpu **)net->mib.icmpv6msg_statistics, NULL);
 	snmp6_seq_show_item(seq, (void __percpu **)net->mib.udp_stats_in6,
-			    snmp6_udp6_list);
+			    NULL, snmp6_udp6_list);
 	snmp6_seq_show_item(seq, (void __percpu **)net->mib.udplite_stats_in6,
-			    snmp6_udplite6_list);
+			    NULL, snmp6_udplite6_list);
 	return 0;
 }
 
@@ -229,11 +241,11 @@ static int snmp6_dev_seq_show(struct seq_file *seq, void *v)
 	struct inet6_dev *idev = (struct inet6_dev *)seq->private;
 
 	seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex);
-	snmp6_seq_show_item(seq, (void __percpu **)idev->stats.ipv6,
+	snmp6_seq_show_item(seq, (void __percpu **)idev->stats.ipv6, NULL,
 			    snmp6_ipstats_list);
-	snmp6_seq_show_item(seq, (void __percpu **)idev->stats.icmpv6,
+	snmp6_seq_show_item(seq, NULL, idev->stats.icmpv6dev->mibs,
 			    snmp6_icmp6_list);
-	snmp6_seq_show_icmpv6msg(seq, (void __percpu **)idev->stats.icmpv6msg);
+	snmp6_seq_show_icmpv6msg(seq, NULL, idev->stats.icmpv6msgdev->mibs);
 	return 0;
 }
 
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index 4a1c3b46c56..ae64984f81a 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -67,8 +67,8 @@ static struct raw_hashinfo raw_v6_hashinfo = {
 };
 
 static struct sock *__raw_v6_lookup(struct net *net, struct sock *sk,
-		unsigned short num, struct in6_addr *loc_addr,
-		struct in6_addr *rmt_addr, int dif)
+		unsigned short num, const struct in6_addr *loc_addr,
+		const struct in6_addr *rmt_addr, int dif)
 {
 	struct hlist_node *node;
 	int is_multicast = ipv6_addr_is_multicast(loc_addr);
@@ -154,8 +154,8 @@ EXPORT_SYMBOL(rawv6_mh_filter_unregister);
  */
 static int ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
 {
-	struct in6_addr *saddr;
-	struct in6_addr *daddr;
+	const struct in6_addr *saddr;
+	const struct in6_addr *daddr;
 	struct sock *sk;
 	int delivered = 0;
 	__u8 hash;
@@ -348,7 +348,7 @@ void raw6_icmp_error(struct sk_buff *skb, int nexthdr,
 {
 	struct sock *sk;
 	int hash;
-	struct in6_addr *saddr, *daddr;
+	const struct in6_addr *saddr, *daddr;
 	struct net *net;
 
 	hash = nexthdr & (RAW_HTABLE_SIZE - 1);
@@ -357,7 +357,7 @@ void raw6_icmp_error(struct sk_buff *skb, int nexthdr,
 	sk = sk_head(&raw_v6_hashinfo.ht[hash]);
 	if (sk != NULL) {
 		/* Note: ipv6_hdr(skb) != skb->data */
-		struct ipv6hdr *ip6h = (struct ipv6hdr *)skb->data;
+		const struct ipv6hdr *ip6h = (const struct ipv6hdr *)skb->data;
 		saddr = &ip6h->saddr;
 		daddr = &ip6h->daddr;
 		net = dev_net(skb->dev);
@@ -542,8 +542,8 @@ static int rawv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6,
 		goto out;
 
 	offset = rp->offset;
-	total_len = inet_sk(sk)->cork.length - (skb_network_header(skb) -
-						skb->data);
+	total_len = inet_sk(sk)->cork.base.length - (skb_network_header(skb) -
+						     skb->data);
 	if (offset >= total_len - 1) {
 		err = -EINVAL;
 		ip6_flush_pending_frames(sk);
@@ -1231,7 +1231,7 @@ struct proto rawv6_prot = {
 static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
 {
 	struct ipv6_pinfo *np = inet6_sk(sp);
-	struct in6_addr *dest, *src;
+	const struct in6_addr *dest, *src;
 	__u16 destp, srcp;
 
 	dest  = &np->daddr;
diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c
index 07beeb06f75..7b954e2539d 100644
--- a/net/ipv6/reassembly.c
+++ b/net/ipv6/reassembly.c
@@ -224,7 +224,7 @@ out:
 }
 
 static __inline__ struct frag_queue *
-fq_find(struct net *net, __be32 id, struct in6_addr *src, struct in6_addr *dst)
+fq_find(struct net *net, __be32 id, const struct in6_addr *src, const struct in6_addr *dst)
 {
 	struct inet_frag_queue *q;
 	struct ip6_create_arg arg;
@@ -535,7 +535,7 @@ static int ipv6_frag_rcv(struct sk_buff *skb)
 {
 	struct frag_hdr *fhdr;
 	struct frag_queue *fq;
-	struct ipv6hdr *hdr = ipv6_hdr(skb);
+	const struct ipv6hdr *hdr = ipv6_hdr(skb);
 	struct net *net = dev_net(skb_dst(skb)->dev);
 
 	IP6_INC_STATS_BH(net, ip6_dst_idev(skb_dst(skb)), IPSTATS_MIB_REASMREQDS);
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index fd0eec6f88c..f1be5c5c85e 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -89,12 +89,12 @@ static void		ip6_rt_update_pmtu(struct dst_entry *dst, u32 mtu);
 
 #ifdef CONFIG_IPV6_ROUTE_INFO
 static struct rt6_info *rt6_add_route_info(struct net *net,
-					   struct in6_addr *prefix, int prefixlen,
-					   struct in6_addr *gwaddr, int ifindex,
+					   const struct in6_addr *prefix, int prefixlen,
+					   const struct in6_addr *gwaddr, int ifindex,
 					   unsigned pref);
 static struct rt6_info *rt6_get_route_info(struct net *net,
-					   struct in6_addr *prefix, int prefixlen,
-					   struct in6_addr *gwaddr, int ifindex);
+					   const struct in6_addr *prefix, int prefixlen,
+					   const struct in6_addr *gwaddr, int ifindex);
 #endif
 
 static u32 *ipv6_cow_metrics(struct dst_entry *dst, unsigned long old)
@@ -227,9 +227,14 @@ static struct rt6_info ip6_blk_hole_entry_template = {
 #endif
 
 /* allocate dst with ip6_dst_ops */
-static inline struct rt6_info *ip6_dst_alloc(struct dst_ops *ops)
+static inline struct rt6_info *ip6_dst_alloc(struct dst_ops *ops,
+					     struct net_device *dev)
 {
-	return (struct rt6_info *)dst_alloc(ops, 0);
+	struct rt6_info *rt = dst_alloc(ops, dev, 0, 0, 0);
+
+	memset(&rt->rt6i_table, 0, sizeof(*rt) - sizeof(struct dst_entry));
+
+	return rt;
 }
 
 static void ip6_dst_destroy(struct dst_entry *dst)
@@ -290,7 +295,7 @@ static __inline__ int rt6_check_expired(const struct rt6_info *rt)
 		time_after(jiffies, rt->rt6i_expires);
 }
 
-static inline int rt6_need_strict(struct in6_addr *daddr)
+static inline int rt6_need_strict(const struct in6_addr *daddr)
 {
 	return ipv6_addr_type(daddr) &
 		(IPV6_ADDR_MULTICAST | IPV6_ADDR_LINKLOCAL | IPV6_ADDR_LOOPBACK);
@@ -302,7 +307,7 @@ static inline int rt6_need_strict(struct in6_addr *daddr)
 
 static inline struct rt6_info *rt6_device_match(struct net *net,
 						    struct rt6_info *rt,
-						    struct in6_addr *saddr,
+						    const struct in6_addr *saddr,
 						    int oif,
 						    int flags)
 {
@@ -514,7 +519,7 @@ static struct rt6_info *rt6_select(struct fib6_node *fn, int oif, int strict)
 
 #ifdef CONFIG_IPV6_ROUTE_INFO
 int rt6_route_rcv(struct net_device *dev, u8 *opt, int len,
-		  struct in6_addr *gwaddr)
+		  const struct in6_addr *gwaddr)
 {
 	struct net *net = dev_net(dev);
 	struct route_info *rinfo = (struct route_info *) opt;
@@ -677,8 +682,8 @@ int ip6_ins_rt(struct rt6_info *rt)
 	return __ip6_ins_rt(rt, &info);
 }
 
-static struct rt6_info *rt6_alloc_cow(struct rt6_info *ort, struct in6_addr *daddr,
-				      struct in6_addr *saddr)
+static struct rt6_info *rt6_alloc_cow(struct rt6_info *ort, const struct in6_addr *daddr,
+				      const struct in6_addr *saddr)
 {
 	struct rt6_info *rt;
 
@@ -746,7 +751,7 @@ static struct rt6_info *rt6_alloc_cow(struct rt6_info *ort, struct in6_addr *dad
 	return rt;
 }
 
-static struct rt6_info *rt6_alloc_clone(struct rt6_info *ort, struct in6_addr *daddr)
+static struct rt6_info *rt6_alloc_clone(struct rt6_info *ort, const struct in6_addr *daddr)
 {
 	struct rt6_info *rt = ip6_rt_copy(ort);
 	if (rt) {
@@ -837,7 +842,7 @@ static struct rt6_info *ip6_pol_route_input(struct net *net, struct fib6_table *
 
 void ip6_route_input(struct sk_buff *skb)
 {
-	struct ipv6hdr *iph = ipv6_hdr(skb);
+	const struct ipv6hdr *iph = ipv6_hdr(skb);
 	struct net *net = dev_net(skb->dev);
 	int flags = RT6_LOOKUP_F_HAS_SADDR;
 	struct flowi6 fl6 = {
@@ -881,11 +886,13 @@ EXPORT_SYMBOL(ip6_route_output);
 
 struct dst_entry *ip6_blackhole_route(struct net *net, struct dst_entry *dst_orig)
 {
-	struct rt6_info *rt = dst_alloc(&ip6_dst_blackhole_ops, 1);
-	struct rt6_info *ort = (struct rt6_info *) dst_orig;
+	struct rt6_info *rt, *ort = (struct rt6_info *) dst_orig;
 	struct dst_entry *new = NULL;
 
+	rt = dst_alloc(&ip6_dst_blackhole_ops, ort->dst.dev, 1, 0, 0);
 	if (rt) {
+		memset(&rt->rt6i_table, 0, sizeof(*rt) - sizeof(struct dst_entry));
+
 		new = &rt->dst;
 
 		new->__use = 1;
@@ -893,9 +900,6 @@ struct dst_entry *ip6_blackhole_route(struct net *net, struct dst_entry *dst_ori
 		new->output = dst_discard;
 
 		dst_copy_metrics(new, &ort->dst);
-		new->dev = ort->dst.dev;
-		if (new->dev)
-			dev_hold(new->dev);
 		rt->rt6i_idev = ort->rt6i_idev;
 		if (rt->rt6i_idev)
 			in6_dev_hold(rt->rt6i_idev);
@@ -1038,13 +1042,12 @@ struct dst_entry *icmp6_dst_alloc(struct net_device *dev,
 	if (unlikely(idev == NULL))
 		return NULL;
 
-	rt = ip6_dst_alloc(&net->ipv6.ip6_dst_ops);
+	rt = ip6_dst_alloc(&net->ipv6.ip6_dst_ops, dev);
 	if (unlikely(rt == NULL)) {
 		in6_dev_put(idev);
 		goto out;
 	}
 
-	dev_hold(dev);
 	if (neigh)
 		neigh_hold(neigh);
 	else {
@@ -1053,7 +1056,6 @@ struct dst_entry *icmp6_dst_alloc(struct net_device *dev,
 			neigh = NULL;
 	}
 
-	rt->rt6i_dev	  = dev;
 	rt->rt6i_idev     = idev;
 	rt->rt6i_nexthop  = neigh;
 	atomic_set(&rt->dst.__refcnt, 1);
@@ -1212,7 +1214,7 @@ int ip6_route_add(struct fib6_config *cfg)
 		goto out;
 	}
 
-	rt = ip6_dst_alloc(&net->ipv6.ip6_dst_ops);
+	rt = ip6_dst_alloc(&net->ipv6.ip6_dst_ops, NULL);
 
 	if (rt == NULL) {
 		err = -ENOMEM;
@@ -1279,7 +1281,7 @@ int ip6_route_add(struct fib6_config *cfg)
 	}
 
 	if (cfg->fc_flags & RTF_GATEWAY) {
-		struct in6_addr *gw_addr;
+		const struct in6_addr *gw_addr;
 		int gwa_type;
 
 		gw_addr = &cfg->fc_gateway;
@@ -1332,6 +1334,16 @@ int ip6_route_add(struct fib6_config *cfg)
 	if (dev == NULL)
 		goto out;
 
+	if (!ipv6_addr_any(&cfg->fc_prefsrc)) {
+		if (!ipv6_chk_addr(net, &cfg->fc_prefsrc, dev, 0)) {
+			err = -EINVAL;
+			goto out;
+		}
+		ipv6_addr_copy(&rt->rt6i_prefsrc.addr, &cfg->fc_prefsrc);
+		rt->rt6i_prefsrc.plen = 128;
+	} else
+		rt->rt6i_prefsrc.plen = 0;
+
 	if (cfg->fc_flags & (RTF_GATEWAY | RTF_NONEXTHOP)) {
 		rt->rt6i_nexthop = __neigh_lookup_errno(&nd_tbl, &rt->rt6i_gateway, dev);
 		if (IS_ERR(rt->rt6i_nexthop)) {
@@ -1509,9 +1521,9 @@ out:
 	return rt;
 };
 
-static struct rt6_info *ip6_route_redirect(struct in6_addr *dest,
-					   struct in6_addr *src,
-					   struct in6_addr *gateway,
+static struct rt6_info *ip6_route_redirect(const struct in6_addr *dest,
+					   const struct in6_addr *src,
+					   const struct in6_addr *gateway,
 					   struct net_device *dev)
 {
 	int flags = RT6_LOOKUP_F_HAS_SADDR;
@@ -1533,8 +1545,8 @@ static struct rt6_info *ip6_route_redirect(struct in6_addr *dest,
 						   flags, __ip6_route_redirect);
 }
 
-void rt6_redirect(struct in6_addr *dest, struct in6_addr *src,
-		  struct in6_addr *saddr,
+void rt6_redirect(const struct in6_addr *dest, const struct in6_addr *src,
+		  const struct in6_addr *saddr,
 		  struct neighbour *neigh, u8 *lladdr, int on_link)
 {
 	struct rt6_info *rt, *nrt = NULL;
@@ -1608,7 +1620,7 @@ out:
  *	i.e. Path MTU discovery
  */
 
-static void rt6_do_pmtu_disc(struct in6_addr *daddr, struct in6_addr *saddr,
+static void rt6_do_pmtu_disc(const struct in6_addr *daddr, const struct in6_addr *saddr,
 			     struct net *net, u32 pmtu, int ifindex)
 {
 	struct rt6_info *rt, *nrt;
@@ -1693,7 +1705,7 @@ out:
 	dst_release(&rt->dst);
 }
 
-void rt6_pmtu_discovery(struct in6_addr *daddr, struct in6_addr *saddr,
+void rt6_pmtu_discovery(const struct in6_addr *daddr, const struct in6_addr *saddr,
 			struct net_device *dev, u32 pmtu)
 {
 	struct net *net = dev_net(dev);
@@ -1721,7 +1733,8 @@ void rt6_pmtu_discovery(struct in6_addr *daddr, struct in6_addr *saddr,
 static struct rt6_info * ip6_rt_copy(struct rt6_info *ort)
 {
 	struct net *net = dev_net(ort->rt6i_dev);
-	struct rt6_info *rt = ip6_dst_alloc(&net->ipv6.ip6_dst_ops);
+	struct rt6_info *rt = ip6_dst_alloc(&net->ipv6.ip6_dst_ops,
+					    ort->dst.dev);
 
 	if (rt) {
 		rt->dst.input = ort->dst.input;
@@ -1729,9 +1742,6 @@ static struct rt6_info * ip6_rt_copy(struct rt6_info *ort)
 
 		dst_copy_metrics(&rt->dst, &ort->dst);
 		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);
@@ -1753,8 +1763,8 @@ static struct rt6_info * ip6_rt_copy(struct rt6_info *ort)
 
 #ifdef CONFIG_IPV6_ROUTE_INFO
 static struct rt6_info *rt6_get_route_info(struct net *net,
-					   struct in6_addr *prefix, int prefixlen,
-					   struct in6_addr *gwaddr, int ifindex)
+					   const struct in6_addr *prefix, int prefixlen,
+					   const struct in6_addr *gwaddr, int ifindex)
 {
 	struct fib6_node *fn;
 	struct rt6_info *rt = NULL;
@@ -1785,8 +1795,8 @@ out:
 }
 
 static struct rt6_info *rt6_add_route_info(struct net *net,
-					   struct in6_addr *prefix, int prefixlen,
-					   struct in6_addr *gwaddr, int ifindex,
+					   const struct in6_addr *prefix, int prefixlen,
+					   const struct in6_addr *gwaddr, int ifindex,
 					   unsigned pref)
 {
 	struct fib6_config cfg = {
@@ -1814,7 +1824,7 @@ static struct rt6_info *rt6_add_route_info(struct net *net,
 }
 #endif
 
-struct rt6_info *rt6_get_dflt_router(struct in6_addr *addr, struct net_device *dev)
+struct rt6_info *rt6_get_dflt_router(const struct in6_addr *addr, struct net_device *dev)
 {
 	struct rt6_info *rt;
 	struct fib6_table *table;
@@ -1836,7 +1846,7 @@ struct rt6_info *rt6_get_dflt_router(struct in6_addr *addr, struct net_device *d
 	return rt;
 }
 
-struct rt6_info *rt6_add_dflt_router(struct in6_addr *gwaddr,
+struct rt6_info *rt6_add_dflt_router(const struct in6_addr *gwaddr,
 				     struct net_device *dev,
 				     unsigned int pref)
 {
@@ -2001,7 +2011,8 @@ struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
 				    int anycast)
 {
 	struct net *net = dev_net(idev->dev);
-	struct rt6_info *rt = ip6_dst_alloc(&net->ipv6.ip6_dst_ops);
+	struct rt6_info *rt = ip6_dst_alloc(&net->ipv6.ip6_dst_ops,
+					    net->loopback_dev);
 	struct neighbour *neigh;
 
 	if (rt == NULL) {
@@ -2011,13 +2022,11 @@ struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
 		return ERR_PTR(-ENOMEM);
 	}
 
-	dev_hold(net->loopback_dev);
 	in6_dev_hold(idev);
 
 	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->dst.obsolete = -1;
 
@@ -2043,6 +2052,55 @@ struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
 	return rt;
 }
 
+int ip6_route_get_saddr(struct net *net,
+			struct rt6_info *rt,
+			const struct in6_addr *daddr,
+			unsigned int prefs,
+			struct in6_addr *saddr)
+{
+	struct inet6_dev *idev = ip6_dst_idev((struct dst_entry*)rt);
+	int err = 0;
+	if (rt->rt6i_prefsrc.plen)
+		ipv6_addr_copy(saddr, &rt->rt6i_prefsrc.addr);
+	else
+		err = ipv6_dev_get_saddr(net, idev ? idev->dev : NULL,
+					 daddr, prefs, saddr);
+	return err;
+}
+
+/* remove deleted ip from prefsrc entries */
+struct arg_dev_net_ip {
+	struct net_device *dev;
+	struct net *net;
+	struct in6_addr *addr;
+};
+
+static int fib6_remove_prefsrc(struct rt6_info *rt, void *arg)
+{
+	struct net_device *dev = ((struct arg_dev_net_ip *)arg)->dev;
+	struct net *net = ((struct arg_dev_net_ip *)arg)->net;
+	struct in6_addr *addr = ((struct arg_dev_net_ip *)arg)->addr;
+
+	if (((void *)rt->rt6i_dev == dev || dev == NULL) &&
+	    rt != net->ipv6.ip6_null_entry &&
+	    ipv6_addr_equal(addr, &rt->rt6i_prefsrc.addr)) {
+		/* remove prefsrc entry */
+		rt->rt6i_prefsrc.plen = 0;
+	}
+	return 0;
+}
+
+void rt6_remove_prefsrc(struct inet6_ifaddr *ifp)
+{
+	struct net *net = dev_net(ifp->idev->dev);
+	struct arg_dev_net_ip adni = {
+		.dev = ifp->idev->dev,
+		.net = net,
+		.addr = &ifp->addr,
+	};
+	fib6_clean_all(net, fib6_remove_prefsrc, 0, &adni);
+}
+
 struct arg_dev_net {
 	struct net_device *dev;
 	struct net *net;
@@ -2189,6 +2247,9 @@ static int rtm_to_fib6_config(struct sk_buff *skb, struct nlmsghdr *nlh,
 		nla_memcpy(&cfg->fc_src, tb[RTA_SRC], plen);
 	}
 
+	if (tb[RTA_PREFSRC])
+		nla_memcpy(&cfg->fc_prefsrc, tb[RTA_PREFSRC], 16);
+
 	if (tb[RTA_OIF])
 		cfg->fc_ifindex = nla_get_u32(tb[RTA_OIF]);
 
@@ -2331,13 +2392,17 @@ 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->dst);
 		struct in6_addr saddr_buf;
-		if (ipv6_dev_get_saddr(net, idev ? idev->dev : NULL,
-				       dst, 0, &saddr_buf) == 0)
+		if (ip6_route_get_saddr(net, rt, dst, 0, &saddr_buf) == 0)
 			NLA_PUT(skb, RTA_PREFSRC, 16, &saddr_buf);
 	}
 
+	if (rt->rt6i_prefsrc.plen) {
+		struct in6_addr saddr_buf;
+		ipv6_addr_copy(&saddr_buf, &rt->rt6i_prefsrc.addr);
+		NLA_PUT(skb, RTA_PREFSRC, 16, &saddr_buf);
+	}
+
 	if (rtnetlink_put_metrics(skb, dst_metrics_ptr(&rt->dst)) < 0)
 		goto nla_put_failure;
 
diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index 5f35d595e4a..1cca5761aea 100644
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -250,11 +250,6 @@ static struct ip_tunnel *ipip6_tunnel_locate(struct net *net,
 
 	dev_net_set(dev, net);
 
-	if (strchr(name, '%')) {
-		if (dev_alloc_name(dev, name) < 0)
-			goto failed_free;
-	}
-
 	nt = netdev_priv(dev);
 
 	nt->parms = *parms;
@@ -447,7 +442,7 @@ out:
 }
 
 static int
-isatap_chksrc(struct sk_buff *skb, struct iphdr *iph, struct ip_tunnel *t)
+isatap_chksrc(struct sk_buff *skb, const struct iphdr *iph, struct ip_tunnel *t)
 {
 	struct ip_tunnel_prl_entry *p;
 	int ok = 1;
@@ -460,7 +455,8 @@ isatap_chksrc(struct sk_buff *skb, struct iphdr *iph, struct ip_tunnel *t)
 		else
 			skb->ndisc_nodetype = NDISC_NODETYPE_NODEFAULT;
 	} else {
-		struct in6_addr *addr6 = &ipv6_hdr(skb)->saddr;
+		const struct in6_addr *addr6 = &ipv6_hdr(skb)->saddr;
+
 		if (ipv6_addr_is_isatap(addr6) &&
 		    (addr6->s6_addr32[3] == iph->saddr) &&
 		    ipv6_chk_prefix(addr6, t->dev))
@@ -494,7 +490,7 @@ static int ipip6_err(struct sk_buff *skb, u32 info)
    8 bytes of packet payload. It means, that precise relaying of
    ICMP in the real Internet is absolutely infeasible.
  */
-	struct iphdr *iph = (struct iphdr*)skb->data;
+	const struct iphdr *iph = (const struct iphdr *)skb->data;
 	const int type = icmp_hdr(skb)->type;
 	const int code = icmp_hdr(skb)->code;
 	struct ip_tunnel *t;
@@ -552,7 +548,7 @@ out:
 	return err;
 }
 
-static inline void ipip6_ecn_decapsulate(struct iphdr *iph, struct sk_buff *skb)
+static inline void ipip6_ecn_decapsulate(const struct iphdr *iph, struct sk_buff *skb)
 {
 	if (INET_ECN_is_ce(iph->tos))
 		IP6_ECN_set_ce(ipv6_hdr(skb));
@@ -560,7 +556,7 @@ static inline void ipip6_ecn_decapsulate(struct iphdr *iph, struct sk_buff *skb)
 
 static int ipip6_rcv(struct sk_buff *skb)
 {
-	struct iphdr *iph;
+	const struct iphdr *iph;
 	struct ip_tunnel *tunnel;
 
 	if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
@@ -616,7 +612,7 @@ out:
  * comes from 6rd / 6to4 (RFC 3056) addr space.
  */
 static inline
-__be32 try_6rd(struct in6_addr *v6dst, struct ip_tunnel *tunnel)
+__be32 try_6rd(const struct in6_addr *v6dst, struct ip_tunnel *tunnel)
 {
 	__be32 dst = 0;
 
@@ -659,8 +655,8 @@ static netdev_tx_t ipip6_tunnel_xmit(struct sk_buff *skb,
 {
 	struct ip_tunnel *tunnel = netdev_priv(dev);
 	struct pcpu_tstats *tstats;
-	struct iphdr  *tiph = &tunnel->parms.iph;
-	struct ipv6hdr *iph6 = ipv6_hdr(skb);
+	const struct iphdr  *tiph = &tunnel->parms.iph;
+	const struct ipv6hdr *iph6 = ipv6_hdr(skb);
 	u8     tos = tunnel->parms.iph.tos;
 	__be16 df = tiph->frag_off;
 	struct rtable *rt;     			/* Route to the other host */
@@ -668,8 +664,9 @@ static netdev_tx_t ipip6_tunnel_xmit(struct sk_buff *skb,
 	struct iphdr  *iph;			/* Our new IP header */
 	unsigned int max_headroom;		/* The extra header space needed */
 	__be32 dst = tiph->daddr;
+	struct flowi4 fl4;
 	int    mtu;
-	struct in6_addr *addr6;
+	const struct in6_addr *addr6;
 	int addr_type;
 
 	if (skb->protocol != htons(ETH_P_IPV6))
@@ -688,7 +685,7 @@ static netdev_tx_t ipip6_tunnel_xmit(struct sk_buff *skb,
 			goto tx_error;
 		}
 
-		addr6 = (struct in6_addr*)&neigh->primary_key;
+		addr6 = (const struct in6_addr*)&neigh->primary_key;
 		addr_type = ipv6_addr_type(addr6);
 
 		if ((addr_type & IPV6_ADDR_UNICAST) &&
@@ -713,7 +710,7 @@ static netdev_tx_t ipip6_tunnel_xmit(struct sk_buff *skb,
 			goto tx_error;
 		}
 
-		addr6 = (struct in6_addr*)&neigh->primary_key;
+		addr6 = (const struct in6_addr*)&neigh->primary_key;
 		addr_type = ipv6_addr_type(addr6);
 
 		if (addr_type == IPV6_ADDR_ANY) {
@@ -727,7 +724,7 @@ static netdev_tx_t ipip6_tunnel_xmit(struct sk_buff *skb,
 		dst = addr6->s6_addr32[3];
 	}
 
-	rt = ip_route_output_ports(dev_net(dev), NULL,
+	rt = ip_route_output_ports(dev_net(dev), &fl4, NULL,
 				   dst, tiph->saddr,
 				   0, 0,
 				   IPPROTO_IPV6, RT_TOS(tos),
@@ -821,8 +818,8 @@ static netdev_tx_t ipip6_tunnel_xmit(struct sk_buff *skb,
 	iph->frag_off		=	df;
 	iph->protocol		=	IPPROTO_IPV6;
 	iph->tos		=	INET_ECN_encapsulate(tos, ipv6_get_dsfield(iph6));
-	iph->daddr		=	rt->rt_dst;
-	iph->saddr		=	rt->rt_src;
+	iph->daddr		=	fl4.daddr;
+	iph->saddr		=	fl4.saddr;
 
 	if ((iph->ttl = tiph->ttl) == 0)
 		iph->ttl	=	iph6->hop_limit;
@@ -844,13 +841,14 @@ static void ipip6_tunnel_bind_dev(struct net_device *dev)
 {
 	struct net_device *tdev = NULL;
 	struct ip_tunnel *tunnel;
-	struct iphdr *iph;
+	const struct iphdr *iph;
+	struct flowi4 fl4;
 
 	tunnel = netdev_priv(dev);
 	iph = &tunnel->parms.iph;
 
 	if (iph->daddr) {
-		struct rtable *rt = ip_route_output_ports(dev_net(dev), NULL,
+		struct rtable *rt = ip_route_output_ports(dev_net(dev), &fl4, NULL,
 							  iph->daddr, iph->saddr,
 							  0, 0,
 							  IPPROTO_IPV6,
diff --git a/net/ipv6/syncookies.c b/net/ipv6/syncookies.c
index 352c26081f5..8b9644a8b69 100644
--- a/net/ipv6/syncookies.c
+++ b/net/ipv6/syncookies.c
@@ -66,7 +66,7 @@ static inline struct sock *get_cookie_sock(struct sock *sk, struct sk_buff *skb,
 static DEFINE_PER_CPU(__u32 [16 + 5 + SHA_WORKSPACE_WORDS],
 		      ipv6_cookie_scratch);
 
-static u32 cookie_hash(struct in6_addr *saddr, struct in6_addr *daddr,
+static u32 cookie_hash(const struct in6_addr *saddr, const struct in6_addr *daddr,
 		       __be16 sport, __be16 dport, u32 count, int c)
 {
 	__u32 *tmp = __get_cpu_var(ipv6_cookie_scratch);
@@ -86,7 +86,8 @@ static u32 cookie_hash(struct in6_addr *saddr, struct in6_addr *daddr,
 	return tmp[17];
 }
 
-static __u32 secure_tcp_syn_cookie(struct in6_addr *saddr, struct in6_addr *daddr,
+static __u32 secure_tcp_syn_cookie(const struct in6_addr *saddr,
+				   const struct in6_addr *daddr,
 				   __be16 sport, __be16 dport, __u32 sseq,
 				   __u32 count, __u32 data)
 {
@@ -96,8 +97,8 @@ static __u32 secure_tcp_syn_cookie(struct in6_addr *saddr, struct in6_addr *dadd
 		& COOKIEMASK));
 }
 
-static __u32 check_tcp_syn_cookie(__u32 cookie, struct in6_addr *saddr,
-				  struct in6_addr *daddr, __be16 sport,
+static __u32 check_tcp_syn_cookie(__u32 cookie, const struct in6_addr *saddr,
+				  const struct in6_addr *daddr, __be16 sport,
 				  __be16 dport, __u32 sseq, __u32 count,
 				  __u32 maxdiff)
 {
@@ -116,7 +117,7 @@ static __u32 check_tcp_syn_cookie(__u32 cookie, struct in6_addr *saddr,
 
 __u32 cookie_v6_init_sequence(struct sock *sk, struct sk_buff *skb, __u16 *mssp)
 {
-	struct ipv6hdr *iph = ipv6_hdr(skb);
+	const struct ipv6hdr *iph = ipv6_hdr(skb);
 	const struct tcphdr *th = tcp_hdr(skb);
 	int mssind;
 	const __u16 mss = *mssp;
@@ -138,7 +139,7 @@ __u32 cookie_v6_init_sequence(struct sock *sk, struct sk_buff *skb, __u16 *mssp)
 
 static inline int cookie_check(struct sk_buff *skb, __u32 cookie)
 {
-	struct ipv6hdr *iph = ipv6_hdr(skb);
+	const struct ipv6hdr *iph = ipv6_hdr(skb);
 	const struct tcphdr *th = tcp_hdr(skb);
 	__u32 seq = ntohl(th->seq) - 1;
 	__u32 mssind = check_tcp_syn_cookie(cookie, &iph->saddr, &iph->daddr,
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 4f49e5dd41b..868366470b4 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -76,8 +76,8 @@ static void	tcp_v6_reqsk_send_ack(struct sock *sk, struct sk_buff *skb,
 
 static int	tcp_v6_do_rcv(struct sock *sk, struct sk_buff *skb);
 static void	__tcp_v6_send_check(struct sk_buff *skb,
-				    struct in6_addr *saddr,
-				    struct in6_addr *daddr);
+				    const struct in6_addr *saddr,
+				    const struct in6_addr *daddr);
 
 static const struct inet_connection_sock_af_ops ipv6_mapped;
 static const struct inet_connection_sock_af_ops ipv6_specific;
@@ -86,7 +86,7 @@ static const struct tcp_sock_af_ops tcp_sock_ipv6_specific;
 static const struct tcp_sock_af_ops tcp_sock_ipv6_mapped_specific;
 #else
 static struct tcp_md5sig_key *tcp_v6_md5_do_lookup(struct sock *sk,
-						   struct in6_addr *addr)
+						   const struct in6_addr *addr)
 {
 	return NULL;
 }
@@ -106,8 +106,8 @@ static void tcp_v6_hash(struct sock *sk)
 }
 
 static __inline__ __sum16 tcp_v6_check(int len,
-				   struct in6_addr *saddr,
-				   struct in6_addr *daddr,
+				   const struct in6_addr *saddr,
+				   const struct in6_addr *daddr,
 				   __wsum base)
 {
 	return csum_ipv6_magic(saddr, daddr, len, IPPROTO_TCP, base);
@@ -331,7 +331,7 @@ failure:
 static void tcp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
 		u8 type, u8 code, int offset, __be32 info)
 {
-	struct ipv6hdr *hdr = (struct ipv6hdr*)skb->data;
+	const struct ipv6hdr *hdr = (const struct ipv6hdr*)skb->data;
 	const struct tcphdr *th = (struct tcphdr *)(skb->data+offset);
 	struct ipv6_pinfo *np;
 	struct sock *sk;
@@ -551,7 +551,7 @@ static void tcp_v6_reqsk_destructor(struct request_sock *req)
 
 #ifdef CONFIG_TCP_MD5SIG
 static struct tcp_md5sig_key *tcp_v6_md5_do_lookup(struct sock *sk,
-						   struct in6_addr *addr)
+						   const struct in6_addr *addr)
 {
 	struct tcp_sock *tp = tcp_sk(sk);
 	int i;
@@ -580,7 +580,7 @@ static struct tcp_md5sig_key *tcp_v6_reqsk_md5_lookup(struct sock *sk,
 	return tcp_v6_md5_do_lookup(sk, &inet6_rsk(req)->rmt_addr);
 }
 
-static int tcp_v6_md5_do_add(struct sock *sk, struct in6_addr *peer,
+static int tcp_v6_md5_do_add(struct sock *sk, const struct in6_addr *peer,
 			     char *newkey, u8 newkeylen)
 {
 	/* Add key to the list */
@@ -645,7 +645,7 @@ static int tcp_v6_md5_add_func(struct sock *sk, struct sock *addr_sk,
 				 newkey, newkeylen);
 }
 
-static int tcp_v6_md5_do_del(struct sock *sk, struct in6_addr *peer)
+static int tcp_v6_md5_do_del(struct sock *sk, const struct in6_addr *peer)
 {
 	struct tcp_sock *tp = tcp_sk(sk);
 	int i;
@@ -753,8 +753,8 @@ static int tcp_v6_parse_md5_keys (struct sock *sk, char __user *optval,
 }
 
 static int tcp_v6_md5_hash_pseudoheader(struct tcp_md5sig_pool *hp,
-					struct in6_addr *daddr,
-					struct in6_addr *saddr, int nbytes)
+					const struct in6_addr *daddr,
+					const struct in6_addr *saddr, int nbytes)
 {
 	struct tcp6_pseudohdr *bp;
 	struct scatterlist sg;
@@ -771,7 +771,7 @@ static int tcp_v6_md5_hash_pseudoheader(struct tcp_md5sig_pool *hp,
 }
 
 static int tcp_v6_md5_hash_hdr(char *md5_hash, struct tcp_md5sig_key *key,
-			       struct in6_addr *daddr, struct in6_addr *saddr,
+			       const struct in6_addr *daddr, struct in6_addr *saddr,
 			       struct tcphdr *th)
 {
 	struct tcp_md5sig_pool *hp;
@@ -807,7 +807,7 @@ static int tcp_v6_md5_hash_skb(char *md5_hash, struct tcp_md5sig_key *key,
 			       struct sock *sk, struct request_sock *req,
 			       struct sk_buff *skb)
 {
-	struct in6_addr *saddr, *daddr;
+	const struct in6_addr *saddr, *daddr;
 	struct tcp_md5sig_pool *hp;
 	struct hash_desc *desc;
 	struct tcphdr *th = tcp_hdr(skb);
@@ -819,7 +819,7 @@ static int tcp_v6_md5_hash_skb(char *md5_hash, struct tcp_md5sig_key *key,
 		saddr = &inet6_rsk(req)->loc_addr;
 		daddr = &inet6_rsk(req)->rmt_addr;
 	} else {
-		struct ipv6hdr *ip6h = ipv6_hdr(skb);
+		const struct ipv6hdr *ip6h = ipv6_hdr(skb);
 		saddr = &ip6h->saddr;
 		daddr = &ip6h->daddr;
 	}
@@ -857,7 +857,7 @@ static int tcp_v6_inbound_md5_hash (struct sock *sk, struct sk_buff *skb)
 {
 	__u8 *hash_location = NULL;
 	struct tcp_md5sig_key *hash_expected;
-	struct ipv6hdr *ip6h = ipv6_hdr(skb);
+	const struct ipv6hdr *ip6h = ipv6_hdr(skb);
 	struct tcphdr *th = tcp_hdr(skb);
 	int genhash;
 	u8 newhash[16];
@@ -915,7 +915,7 @@ static const struct tcp_request_sock_ops tcp_request_sock_ipv6_ops = {
 #endif
 
 static void __tcp_v6_send_check(struct sk_buff *skb,
-				struct in6_addr *saddr, struct in6_addr *daddr)
+				const struct in6_addr *saddr, const struct in6_addr *daddr)
 {
 	struct tcphdr *th = tcp_hdr(skb);
 
@@ -939,7 +939,7 @@ static void tcp_v6_send_check(struct sock *sk, struct sk_buff *skb)
 
 static int tcp_v6_gso_send_check(struct sk_buff *skb)
 {
-	struct ipv6hdr *ipv6h;
+	const struct ipv6hdr *ipv6h;
 	struct tcphdr *th;
 
 	if (!pskb_may_pull(skb, sizeof(*th)))
@@ -957,7 +957,7 @@ static int tcp_v6_gso_send_check(struct sk_buff *skb)
 static struct sk_buff **tcp6_gro_receive(struct sk_buff **head,
 					 struct sk_buff *skb)
 {
-	struct ipv6hdr *iph = skb_gro_network_header(skb);
+	const struct ipv6hdr *iph = skb_gro_network_header(skb);
 
 	switch (skb->ip_summed) {
 	case CHECKSUM_COMPLETE:
@@ -978,7 +978,7 @@ static struct sk_buff **tcp6_gro_receive(struct sk_buff **head,
 
 static int tcp6_gro_complete(struct sk_buff *skb)
 {
-	struct ipv6hdr *iph = ipv6_hdr(skb);
+	const struct ipv6hdr *iph = ipv6_hdr(skb);
 	struct tcphdr *th = tcp_hdr(skb);
 
 	th->check = ~tcp_v6_check(skb->len - skb_transport_offset(skb),
@@ -1469,7 +1469,7 @@ static struct sock * tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
 
 	   First: no IPv4 options.
 	 */
-	newinet->opt = NULL;
+	newinet->inet_opt = NULL;
 	newnp->ipv6_fl_list = NULL;
 
 	/* Clone RX bits */
@@ -1702,7 +1702,7 @@ ipv6_pktoptions:
 static int tcp_v6_rcv(struct sk_buff *skb)
 {
 	struct tcphdr *th;
-	struct ipv6hdr *hdr;
+	const struct ipv6hdr *hdr;
 	struct sock *sk;
 	int ret;
 	struct net *net = dev_net(skb->dev);
@@ -2028,8 +2028,8 @@ static void get_openreq6(struct seq_file *seq,
 			 struct sock *sk, struct request_sock *req, int i, int uid)
 {
 	int ttd = req->expires - jiffies;
-	struct in6_addr *src = &inet6_rsk(req)->loc_addr;
-	struct in6_addr *dest = &inet6_rsk(req)->rmt_addr;
+	const struct in6_addr *src = &inet6_rsk(req)->loc_addr;
+	const struct in6_addr *dest = &inet6_rsk(req)->rmt_addr;
 
 	if (ttd < 0)
 		ttd = 0;
@@ -2057,7 +2057,7 @@ static void get_openreq6(struct seq_file *seq,
 
 static void get_tcp6_sock(struct seq_file *seq, struct sock *sp, int i)
 {
-	struct in6_addr *dest, *src;
+	const struct in6_addr *dest, *src;
 	__u16 destp, srcp;
 	int timer_active;
 	unsigned long timer_expires;
@@ -2114,7 +2114,7 @@ static void get_tcp6_sock(struct seq_file *seq, struct sock *sp, int i)
 static void get_timewait6_sock(struct seq_file *seq,
 			       struct inet_timewait_sock *tw, int i)
 {
-	struct in6_addr *dest, *src;
+	const struct in6_addr *dest, *src;
 	__u16 destp, srcp;
 	struct inet6_timewait_sock *tw6 = inet6_twsk((struct sock *)tw);
 	int ttd = tw->tw_ttd - jiffies;
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 9e305d74b3d..fc0c42a88e5 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -311,7 +311,7 @@ static struct sock *__udp6_lib_lookup_skb(struct sk_buff *skb,
 					  struct udp_table *udptable)
 {
 	struct sock *sk;
-	struct ipv6hdr *iph = ipv6_hdr(skb);
+	const struct ipv6hdr *iph = ipv6_hdr(skb);
 
 	if (unlikely(sk = skb_steal_sock(skb)))
 		return sk;
@@ -463,9 +463,9 @@ void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
 		    struct udp_table *udptable)
 {
 	struct ipv6_pinfo *np;
-	struct ipv6hdr *hdr = (struct ipv6hdr*)skb->data;
-	struct in6_addr *saddr = &hdr->saddr;
-	struct in6_addr *daddr = &hdr->daddr;
+	const struct ipv6hdr *hdr = (const struct ipv6hdr *)skb->data;
+	const struct in6_addr *saddr = &hdr->saddr;
+	const struct in6_addr *daddr = &hdr->daddr;
 	struct udphdr *uh = (struct udphdr*)(skb->data+offset);
 	struct sock *sk;
 	int err;
@@ -553,8 +553,8 @@ drop_no_sk_drops_inc:
 }
 
 static struct sock *udp_v6_mcast_next(struct net *net, struct sock *sk,
-				      __be16 loc_port, struct in6_addr *loc_addr,
-				      __be16 rmt_port, struct in6_addr *rmt_addr,
+				      __be16 loc_port, const struct in6_addr *loc_addr,
+				      __be16 rmt_port, const struct in6_addr *rmt_addr,
 				      int dif)
 {
 	struct hlist_nulls_node *node;
@@ -633,7 +633,7 @@ drop:
  * so we don't need to lock the hashes.
  */
 static int __udp6_lib_mcast_deliver(struct net *net, struct sk_buff *skb,
-		struct in6_addr *saddr, struct in6_addr *daddr,
+		const struct in6_addr *saddr, const struct in6_addr *daddr,
 		struct udp_table *udptable)
 {
 	struct sock *sk, *stack[256 / sizeof(struct sock *)];
@@ -716,7 +716,7 @@ int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable,
 	struct net *net = dev_net(skb->dev);
 	struct sock *sk;
 	struct udphdr *uh;
-	struct in6_addr *saddr, *daddr;
+	const struct in6_addr *saddr, *daddr;
 	u32 ulen = 0;
 
 	if (!pskb_may_pull(skb, sizeof(struct udphdr)))
@@ -1278,7 +1278,7 @@ int compat_udpv6_getsockopt(struct sock *sk, int level, int optname,
 
 static int udp6_ufo_send_check(struct sk_buff *skb)
 {
-	struct ipv6hdr *ipv6h;
+	const struct ipv6hdr *ipv6h;
 	struct udphdr *uh;
 
 	if (!pskb_may_pull(skb, sizeof(*uh)))
@@ -1328,7 +1328,7 @@ static struct sk_buff *udp6_ufo_fragment(struct sk_buff *skb, u32 features)
 	/* Do software UFO. Complete and fill in the UDP checksum as HW cannot
 	 * do checksum of UDP packets sent as multiple IP fragments.
 	 */
-	offset = skb->csum_start - skb_headroom(skb);
+	offset = skb_checksum_start_offset(skb);
 	csum = skb_checksum(skb, offset, skb->len- offset, 0);
 	offset += skb->csum_offset;
 	*(__sum16 *)(skb->data + offset) = csum_fold(csum);
@@ -1382,7 +1382,7 @@ static void udp6_sock_seq_show(struct seq_file *seq, struct sock *sp, int bucket
 {
 	struct inet_sock *inet = inet_sk(sp);
 	struct ipv6_pinfo *np = inet6_sk(sp);
-	struct in6_addr *dest, *src;
+	const struct in6_addr *dest, *src;
 	__u16 destp, srcp;
 
 	dest  = &np->daddr;
diff --git a/net/ipv6/xfrm6_mode_beet.c b/net/ipv6/xfrm6_mode_beet.c
index bbd48b101ba..3437d7d4eed 100644
--- a/net/ipv6/xfrm6_mode_beet.c
+++ b/net/ipv6/xfrm6_mode_beet.c
@@ -41,10 +41,8 @@ static int xfrm6_beet_output(struct xfrm_state *x, struct sk_buff *skb)
 {
 	struct ipv6hdr *top_iph;
 	struct ip_beet_phdr *ph;
-	struct iphdr *iphv4;
 	int optlen, hdr_len;
 
-	iphv4 = ip_hdr(skb);
 	hdr_len = 0;
 	optlen = XFRM_MODE_SKB_CB(skb)->optlen;
 	if (unlikely(optlen))
diff --git a/net/ipv6/xfrm6_mode_tunnel.c b/net/ipv6/xfrm6_mode_tunnel.c
index 645cb968d45..4d6edff0498 100644
--- a/net/ipv6/xfrm6_mode_tunnel.c
+++ b/net/ipv6/xfrm6_mode_tunnel.c
@@ -20,7 +20,7 @@
 
 static inline void ipip6_ecn_decapsulate(struct sk_buff *skb)
 {
-	struct ipv6hdr *outer_iph = ipv6_hdr(skb);
+	const struct ipv6hdr *outer_iph = ipv6_hdr(skb);
 	struct ipv6hdr *inner_iph = ipipv6_hdr(skb);
 
 	if (INET_ECN_is_ce(ipv6_get_dsfield(outer_iph)))
@@ -55,8 +55,8 @@ static int xfrm6_mode_tunnel_output(struct xfrm_state *x, struct sk_buff *skb)
 		dsfield &= ~INET_ECN_MASK;
 	ipv6_change_dsfield(top_iph, 0, dsfield);
 	top_iph->hop_limit = ip6_dst_hoplimit(dst->child);
-	ipv6_addr_copy(&top_iph->saddr, (struct in6_addr *)&x->props.saddr);
-	ipv6_addr_copy(&top_iph->daddr, (struct in6_addr *)&x->id.daddr);
+	ipv6_addr_copy(&top_iph->saddr, (const struct in6_addr *)&x->props.saddr);
+	ipv6_addr_copy(&top_iph->daddr, (const struct in6_addr *)&x->id.daddr);
 	return 0;
 }
 
diff --git a/net/ipv6/xfrm6_policy.c b/net/ipv6/xfrm6_policy.c
index 05e34c8ec91..d879f7efbd1 100644
--- a/net/ipv6/xfrm6_policy.c
+++ b/net/ipv6/xfrm6_policy.c
@@ -124,7 +124,7 @@ _decode_session6(struct sk_buff *skb, struct flowi *fl, int reverse)
 	struct flowi6 *fl6 = &fl->u.ip6;
 	int onlyproto = 0;
 	u16 offset = skb_network_header_len(skb);
-	struct ipv6hdr *hdr = ipv6_hdr(skb);
+	const struct ipv6hdr *hdr = ipv6_hdr(skb);
 	struct ipv6_opt_hdr *exthdr;
 	const unsigned char *nh = skb_network_header(skb);
 	u8 nexthdr = nh[IP6CB(skb)->nhoff];
diff --git a/net/ipv6/xfrm6_tunnel.c b/net/ipv6/xfrm6_tunnel.c
index 2969cad408d..a6770a04e3b 100644
--- a/net/ipv6/xfrm6_tunnel.c
+++ b/net/ipv6/xfrm6_tunnel.c
@@ -68,7 +68,7 @@ static DEFINE_SPINLOCK(xfrm6_tunnel_spi_lock);
 
 static struct kmem_cache *xfrm6_tunnel_spi_kmem __read_mostly;
 
-static inline unsigned xfrm6_tunnel_spi_hash_byaddr(xfrm_address_t *addr)
+static inline unsigned xfrm6_tunnel_spi_hash_byaddr(const xfrm_address_t *addr)
 {
 	unsigned h;
 
@@ -85,7 +85,7 @@ static inline unsigned xfrm6_tunnel_spi_hash_byspi(u32 spi)
 	return spi % XFRM6_TUNNEL_SPI_BYSPI_HSIZE;
 }
 
-static struct xfrm6_tunnel_spi *__xfrm6_tunnel_spi_lookup(struct net *net, xfrm_address_t *saddr)
+static struct xfrm6_tunnel_spi *__xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr)
 {
 	struct xfrm6_tunnel_net *xfrm6_tn = xfrm6_tunnel_pernet(net);
 	struct xfrm6_tunnel_spi *x6spi;
@@ -101,7 +101,7 @@ static struct xfrm6_tunnel_spi *__xfrm6_tunnel_spi_lookup(struct net *net, xfrm_
 	return NULL;
 }
 
-__be32 xfrm6_tunnel_spi_lookup(struct net *net, xfrm_address_t *saddr)
+__be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr)
 {
 	struct xfrm6_tunnel_spi *x6spi;
 	u32 spi;
@@ -237,10 +237,10 @@ static int xfrm6_tunnel_input(struct xfrm_state *x, struct sk_buff *skb)
 static int xfrm6_tunnel_rcv(struct sk_buff *skb)
 {
 	struct net *net = dev_net(skb->dev);
-	struct ipv6hdr *iph = ipv6_hdr(skb);
+	const struct ipv6hdr *iph = ipv6_hdr(skb);
 	__be32 spi;
 
-	spi = xfrm6_tunnel_spi_lookup(net, (xfrm_address_t *)&iph->saddr);
+	spi = xfrm6_tunnel_spi_lookup(net, (const xfrm_address_t *)&iph->saddr);
 	return xfrm6_rcv_spi(skb, IPPROTO_IPV6, spi) > 0 ? : 0;
 }