Merge branch 'osd-devel' into nfs-for-next

19 files changed, 295 insertions, 181 deletions

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 12368c58606..d0611a5de45 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -428,7 +428,7 @@ static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
 	ndev->tstamp = jiffies;
 	addrconf_sysctl_register(ndev);
 	/* protected by rtnl_lock */
-	rcu_assign_pointer(dev->ip6_ptr, ndev);
+	RCU_INIT_POINTER(dev->ip6_ptr, ndev);
 
 	/* Join all-node multicast group */
 	ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes);
@@ -824,12 +824,13 @@ static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *i
 {
 	struct inet6_dev *idev = ifp->idev;
 	struct in6_addr addr, *tmpaddr;
-	unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp, age;
+	unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_tstamp, age;
 	unsigned long regen_advance;
 	int tmp_plen;
 	int ret = 0;
 	int max_addresses;
 	u32 addr_flags;
+	unsigned long now = jiffies;
 
 	write_lock(&idev->lock);
 	if (ift) {
@@ -874,7 +875,7 @@ retry:
 		goto out;
 	}
 	memcpy(&addr.s6_addr[8], idev->rndid, 8);
-	age = (jiffies - ifp->tstamp) / HZ;
+	age = (now - ifp->tstamp) / HZ;
 	tmp_valid_lft = min_t(__u32,
 			      ifp->valid_lft,
 			      idev->cnf.temp_valid_lft + age);
@@ -884,7 +885,6 @@ retry:
 				 idev->cnf.max_desync_factor);
 	tmp_plen = ifp->prefix_len;
 	max_addresses = idev->cnf.max_addresses;
-	tmp_cstamp = ifp->cstamp;
 	tmp_tstamp = ifp->tstamp;
 	spin_unlock_bh(&ifp->lock);
 
@@ -929,7 +929,7 @@ retry:
 	ift->ifpub = ifp;
 	ift->valid_lft = tmp_valid_lft;
 	ift->prefered_lft = tmp_prefered_lft;
-	ift->cstamp = tmp_cstamp;
+	ift->cstamp = now;
 	ift->tstamp = tmp_tstamp;
 	spin_unlock_bh(&ift->lock);
 
@@ -1713,6 +1713,40 @@ addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
 	ip6_route_add(&cfg);
 }
 
+
+static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx,
+						  int plen,
+						  const struct net_device *dev,
+						  u32 flags, u32 noflags)
+{
+	struct fib6_node *fn;
+	struct rt6_info *rt = NULL;
+	struct fib6_table *table;
+
+	table = fib6_get_table(dev_net(dev), RT6_TABLE_PREFIX);
+	if (table == NULL)
+		return NULL;
+
+	write_lock_bh(&table->tb6_lock);
+	fn = fib6_locate(&table->tb6_root, pfx, plen, NULL, 0);
+	if (!fn)
+		goto out;
+	for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) {
+		if (rt->rt6i_dev->ifindex != dev->ifindex)
+			continue;
+		if ((rt->rt6i_flags & flags) != flags)
+			continue;
+		if ((noflags != 0) && ((rt->rt6i_flags & flags) != 0))
+			continue;
+		dst_hold(&rt->dst);
+		break;
+	}
+out:
+	write_unlock_bh(&table->tb6_lock);
+	return rt;
+}
+
+
 /* Create "default" multicast route to the interface */
 
 static void addrconf_add_mroute(struct net_device *dev)
@@ -1842,10 +1876,13 @@ void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
 		if (addrconf_finite_timeout(rt_expires))
 			rt_expires *= HZ;
 
-		rt = rt6_lookup(net, &pinfo->prefix, NULL,
-				dev->ifindex, 1);
+		rt = addrconf_get_prefix_route(&pinfo->prefix,
+					       pinfo->prefix_len,
+					       dev,
+					       RTF_ADDRCONF | RTF_PREFIX_RT,
+					       RTF_GATEWAY | RTF_DEFAULT);
 
-		if (rt && addrconf_is_prefix_route(rt)) {
+		if (rt) {
 			/* Autoconf prefix route */
 			if (valid_lft == 0) {
 				ip6_del_rt(rt);
@@ -1999,25 +2036,50 @@ ok:
 #ifdef CONFIG_IPV6_PRIVACY
 			read_lock_bh(&in6_dev->lock);
 			/* update all temporary addresses in the list */
-			list_for_each_entry(ift, &in6_dev->tempaddr_list, tmp_list) {
-				/*
-				 * When adjusting the lifetimes of an existing
-				 * temporary address, only lower the lifetimes.
-				 * Implementations must not increase the
-				 * lifetimes of an existing temporary address
-				 * when processing a Prefix Information Option.
-				 */
+			list_for_each_entry(ift, &in6_dev->tempaddr_list,
+					    tmp_list) {
+				int age, max_valid, max_prefered;
+
 				if (ifp != ift->ifpub)
 					continue;
 
+				/*
+				 * RFC 4941 section 3.3:
+				 * If a received option will extend the lifetime
+				 * of a public address, the lifetimes of
+				 * temporary addresses should be extended,
+				 * subject to the overall constraint that no
+				 * temporary addresses should ever remain
+				 * "valid" or "preferred" for a time longer than
+				 * (TEMP_VALID_LIFETIME) or
+				 * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR),
+				 * respectively.
+				 */
+				age = (now - ift->cstamp) / HZ;
+				max_valid = in6_dev->cnf.temp_valid_lft - age;
+				if (max_valid < 0)
+					max_valid = 0;
+
+				max_prefered = in6_dev->cnf.temp_prefered_lft -
+					       in6_dev->cnf.max_desync_factor -
+					       age;
+				if (max_prefered < 0)
+					max_prefered = 0;
+
+				if (valid_lft > max_valid)
+					valid_lft = max_valid;
+
+				if (prefered_lft > max_prefered)
+					prefered_lft = max_prefered;
+
 				spin_lock(&ift->lock);
 				flags = ift->flags;
-				if (ift->valid_lft > valid_lft &&
-				    ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ)
-					ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ;
-				if (ift->prefered_lft > prefered_lft &&
-				    ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ)
-					ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ;
+				ift->valid_lft = valid_lft;
+				ift->prefered_lft = prefered_lft;
+				ift->tstamp = now;
+				if (prefered_lft > 0)
+					ift->flags &= ~IFA_F_DEPRECATED;
+
 				spin_unlock(&ift->lock);
 				if (!(flags&IFA_F_TENTATIVE))
 					ipv6_ifa_notify(0, ift);
@@ -2025,9 +2087,11 @@ ok:
 
 			if ((create || list_empty(&in6_dev->tempaddr_list)) && in6_dev->cnf.use_tempaddr > 0) {
 				/*
-				 * When a new public address is created as described in [ADDRCONF],
-				 * also create a new temporary address. Also create a temporary
-				 * address if it's enabled but no temporary address currently exists.
+				 * When a new public address is created as
+				 * described in [ADDRCONF], also create a new
+				 * temporary address. Also create a temporary
+				 * address if it's enabled but no temporary
+				 * address currently exists.
 				 */
 				read_unlock_bh(&in6_dev->lock);
 				ipv6_create_tempaddr(ifp, NULL);
@@ -2706,7 +2770,7 @@ static int addrconf_ifdown(struct net_device *dev, int how)
 		idev->dead = 1;
 
 		/* protected by rtnl_lock */
-		rcu_assign_pointer(dev->ip6_ptr, NULL);
+		RCU_INIT_POINTER(dev->ip6_ptr, NULL);
 
 		/* Step 1.5: remove snmp6 entry */
 		snmp6_unregister_dev(idev);
@@ -2969,12 +3033,12 @@ static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
 
 	ipv6_ifa_notify(RTM_NEWADDR, ifp);
 
-	/* If added prefix is link local and forwarding is off,
-	   start sending router solicitations.
+	/* If added prefix is link local and we are prepared to process
+	   router advertisements, start sending router solicitations.
 	 */
 
-	if ((ifp->idev->cnf.forwarding == 0 ||
-	     ifp->idev->cnf.forwarding == 2) &&
+	if (((ifp->idev->cnf.accept_ra == 1 && !ifp->idev->cnf.forwarding) ||
+	     ifp->idev->cnf.accept_ra == 2) &&
 	    ifp->idev->cnf.rtr_solicits > 0 &&
 	    (dev->flags&IFF_LOOPBACK) == 0 &&
 	    (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
diff --git a/net/ipv6/datagram.c b/net/ipv6/datagram.c
index b46e9f88ce3..e2480691c22 100644
--- a/net/ipv6/datagram.c
+++ b/net/ipv6/datagram.c
@@ -297,10 +297,6 @@ void ipv6_local_rxpmtu(struct sock *sk, struct flowi6 *fl6, u32 mtu)
 	ipv6_addr_copy(&iph->daddr, &fl6->daddr);
 
 	mtu_info = IP6CBMTU(skb);
-	if (!mtu_info) {
-		kfree_skb(skb);
-		return;
-	}
 
 	mtu_info->ip6m_mtu = mtu;
 	mtu_info->ip6m_addr.sin6_family = AF_INET6;
diff --git a/net/ipv6/exthdrs.c b/net/ipv6/exthdrs.c
index 79a485e8a70..1318de4c3e8 100644
--- a/net/ipv6/exthdrs.c
+++ b/net/ipv6/exthdrs.c
@@ -273,12 +273,12 @@ static int ipv6_destopt_rcv(struct sk_buff *skb)
 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
 	__u16 dstbuf;
 #endif
-	struct dst_entry *dst;
+	struct dst_entry *dst = skb_dst(skb);
 
 	if (!pskb_may_pull(skb, skb_transport_offset(skb) + 8) ||
 	    !pskb_may_pull(skb, (skb_transport_offset(skb) +
 				 ((skb_transport_header(skb)[1] + 1) << 3)))) {
-		IP6_INC_STATS_BH(dev_net(skb_dst(skb)->dev), ip6_dst_idev(skb_dst(skb)),
+		IP6_INC_STATS_BH(dev_net(dst->dev), ip6_dst_idev(dst),
 				 IPSTATS_MIB_INHDRERRORS);
 		kfree_skb(skb);
 		return -1;
@@ -289,9 +289,7 @@ static int ipv6_destopt_rcv(struct sk_buff *skb)
 	dstbuf = opt->dst1;
 #endif
 
-	dst = dst_clone(skb_dst(skb));
 	if (ip6_parse_tlv(tlvprocdestopt_lst, skb)) {
-		dst_release(dst);
 		skb->transport_header += (skb_transport_header(skb)[1] + 1) << 3;
 		opt = IP6CB(skb);
 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
@@ -304,7 +302,6 @@ static int ipv6_destopt_rcv(struct sk_buff *skb)
 
 	IP6_INC_STATS_BH(dev_net(dst->dev),
 			 ip6_dst_idev(dst), IPSTATS_MIB_INHDRERRORS);
-	dst_release(dst);
 	return -1;
 }
 
diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c
index 11900417b1c..90868fb4275 100644
--- a/net/ipv6/icmp.c
+++ b/net/ipv6/icmp.c
@@ -490,7 +490,8 @@ void icmpv6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info)
 		goto out_dst_release;
 	}
 
-	idev = in6_dev_get(skb->dev);
+	rcu_read_lock();
+	idev = __in6_dev_get(skb->dev);
 
 	err = ip6_append_data(sk, icmpv6_getfrag, &msg,
 			      len + sizeof(struct icmp6hdr),
@@ -500,19 +501,16 @@ void icmpv6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info)
 	if (err) {
 		ICMP6_INC_STATS_BH(net, idev, ICMP6_MIB_OUTERRORS);
 		ip6_flush_pending_frames(sk);
-		goto out_put;
+	} else {
+		err = icmpv6_push_pending_frames(sk, &fl6, &tmp_hdr,
+						 len + sizeof(struct icmp6hdr));
 	}
-	err = icmpv6_push_pending_frames(sk, &fl6, &tmp_hdr, len + sizeof(struct icmp6hdr));
-
-out_put:
-	if (likely(idev != NULL))
-		in6_dev_put(idev);
+	rcu_read_unlock();
 out_dst_release:
 	dst_release(dst);
 out:
 	icmpv6_xmit_unlock(sk);
 }
-
 EXPORT_SYMBOL(icmpv6_send);
 
 static void icmpv6_echo_reply(struct sk_buff *skb)
@@ -569,7 +567,7 @@ static void icmpv6_echo_reply(struct sk_buff *skb)
 	if (hlimit < 0)
 		hlimit = ip6_dst_hoplimit(dst);
 
-	idev = in6_dev_get(skb->dev);
+	idev = __in6_dev_get(skb->dev);
 
 	msg.skb = skb;
 	msg.offset = 0;
@@ -583,13 +581,10 @@ static void icmpv6_echo_reply(struct sk_buff *skb)
 	if (err) {
 		ICMP6_INC_STATS_BH(net, idev, ICMP6_MIB_OUTERRORS);
 		ip6_flush_pending_frames(sk);
-		goto out_put;
+	} else {
+		err = icmpv6_push_pending_frames(sk, &fl6, &tmp_hdr,
+						 skb->len + sizeof(struct icmp6hdr));
 	}
-	err = icmpv6_push_pending_frames(sk, &fl6, &tmp_hdr, skb->len + sizeof(struct icmp6hdr));
-
-out_put:
-	if (likely(idev != NULL))
-		in6_dev_put(idev);
 	dst_release(dst);
 out:
 	icmpv6_xmit_unlock(sk);
@@ -840,8 +835,7 @@ static int __net_init icmpv6_sk_init(struct net *net)
 		/* Enough space for 2 64K ICMP packets, including
 		 * sk_buff struct overhead.
 		 */
-		sk->sk_sndbuf =
-			(2 * ((64 * 1024) + sizeof(struct sk_buff)));
+		sk->sk_sndbuf = 2 * SKB_TRUESIZE(64 * 1024);
 	}
 	return 0;
 
diff --git a/net/ipv6/inet6_connection_sock.c b/net/ipv6/inet6_connection_sock.c
index 8a58e8cf664..fee46d5a2f1 100644
--- a/net/ipv6/inet6_connection_sock.c
+++ b/net/ipv6/inet6_connection_sock.c
@@ -211,6 +211,7 @@ int inet6_csk_xmit(struct sk_buff *skb, struct flowi *fl_unused)
 	struct flowi6 fl6;
 	struct dst_entry *dst;
 	struct in6_addr *final_p, final;
+	int res;
 
 	memset(&fl6, 0, sizeof(fl6));
 	fl6.flowi6_proto = sk->sk_protocol;
@@ -241,12 +242,14 @@ int inet6_csk_xmit(struct sk_buff *skb, struct flowi *fl_unused)
 		__inet6_csk_dst_store(sk, dst, NULL, NULL);
 	}
 
-	skb_dst_set(skb, dst_clone(dst));
+	rcu_read_lock();
+	skb_dst_set_noref(skb, dst);
 
 	/* Restore final destination back after routing done */
 	ipv6_addr_copy(&fl6.daddr, &np->daddr);
 
-	return ip6_xmit(sk, skb, &fl6, np->opt);
+	res = ip6_xmit(sk, skb, &fl6, np->opt, np->tclass);
+	rcu_read_unlock();
+	return res;
 }
-
 EXPORT_SYMBOL_GPL(inet6_csk_xmit);
diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c
index 320d91d20ad..93718f3db79 100644
--- a/net/ipv6/ip6_fib.c
+++ b/net/ipv6/ip6_fib.c
@@ -28,10 +28,6 @@
 #include <linux/list.h>
 #include <linux/slab.h>
 
-#ifdef 	CONFIG_PROC_FS
-#include <linux/proc_fs.h>
-#endif
-
 #include <net/ipv6.h>
 #include <net/ndisc.h>
 #include <net/addrconf.h>
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 4c882cf4e8a..84d0bd5cac9 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -180,7 +180,7 @@ int ip6_output(struct sk_buff *skb)
  */
 
 int ip6_xmit(struct sock *sk, struct sk_buff *skb, struct flowi6 *fl6,
-	     struct ipv6_txoptions *opt)
+	     struct ipv6_txoptions *opt, int tclass)
 {
 	struct net *net = sock_net(sk);
 	struct ipv6_pinfo *np = inet6_sk(sk);
@@ -190,7 +190,6 @@ int ip6_xmit(struct sock *sk, struct sk_buff *skb, struct flowi6 *fl6,
 	u8  proto = fl6->flowi6_proto;
 	int seg_len = skb->len;
 	int hlimit = -1;
-	int tclass = 0;
 	u32 mtu;
 
 	if (opt) {
@@ -228,10 +227,8 @@ int ip6_xmit(struct sock *sk, struct sk_buff *skb, struct flowi6 *fl6,
 	/*
 	 *	Fill in the IPv6 header
 	 */
-	if (np) {
-		tclass = np->tclass;
+	if (np)
 		hlimit = np->hop_limit;
-	}
 	if (hlimit < 0)
 		hlimit = ip6_dst_hoplimit(dst);
 
@@ -1126,7 +1123,7 @@ static inline int ip6_ufo_append_data(struct sock *sk,
 			hh_len + fragheaderlen + transhdrlen + 20,
 			(flags & MSG_DONTWAIT), &err);
 		if (skb == NULL)
-			return -ENOMEM;
+			return err;
 
 		/* reserve space for Hardware header */
 		skb_reserve(skb, hh_len);
@@ -1193,6 +1190,7 @@ int ip6_append_data(struct sock *sk, int getfrag(void *from, char *to,
 	struct sk_buff *skb;
 	unsigned int maxfraglen, fragheaderlen;
 	int exthdrlen;
+	int dst_exthdrlen;
 	int hh_len;
 	int mtu;
 	int copy;
@@ -1248,7 +1246,7 @@ int ip6_append_data(struct sock *sk, int getfrag(void *from, char *to,
 		np->cork.hop_limit = hlimit;
 		np->cork.tclass = tclass;
 		mtu = np->pmtudisc == IPV6_PMTUDISC_PROBE ?
-		      rt->dst.dev->mtu : dst_mtu(rt->dst.path);
+		      rt->dst.dev->mtu : dst_mtu(&rt->dst);
 		if (np->frag_size < mtu) {
 			if (np->frag_size)
 				mtu = np->frag_size;
@@ -1259,16 +1257,17 @@ int ip6_append_data(struct sock *sk, int getfrag(void *from, char *to,
 		cork->length = 0;
 		sk->sk_sndmsg_page = NULL;
 		sk->sk_sndmsg_off = 0;
-		exthdrlen = rt->dst.header_len + (opt ? opt->opt_flen : 0) -
-			    rt->rt6i_nfheader_len;
+		exthdrlen = (opt ? opt->opt_flen : 0) - rt->rt6i_nfheader_len;
 		length += exthdrlen;
 		transhdrlen += exthdrlen;
+		dst_exthdrlen = rt->dst.header_len;
 	} else {
 		rt = (struct rt6_info *)cork->dst;
 		fl6 = &inet->cork.fl.u.ip6;
 		opt = np->cork.opt;
 		transhdrlen = 0;
 		exthdrlen = 0;
+		dst_exthdrlen = 0;
 		mtu = cork->fragsize;
 	}
 
@@ -1368,6 +1367,8 @@ alloc_new_skb:
 			else
 				alloclen = datalen + fragheaderlen;
 
+			alloclen += dst_exthdrlen;
+
 			/*
 			 * The last fragment gets additional space at tail.
 			 * Note: we overallocate on fragments with MSG_MODE
@@ -1419,9 +1420,9 @@ alloc_new_skb:
 			/*
 			 *	Find where to start putting bytes
 			 */
-			data = skb_put(skb, fraglen);
-			skb_set_network_header(skb, exthdrlen);
-			data += fragheaderlen;
+			data = skb_put(skb, fraglen + dst_exthdrlen);
+			skb_set_network_header(skb, exthdrlen + dst_exthdrlen);
+			data += fragheaderlen + dst_exthdrlen;
 			skb->transport_header = (skb->network_header +
 						 fragheaderlen);
 			if (fraggap) {
@@ -1434,6 +1435,7 @@ alloc_new_skb:
 				pskb_trim_unique(skb_prev, maxfraglen);
 			}
 			copy = datalen - transhdrlen - fraggap;
+
 			if (copy < 0) {
 				err = -EINVAL;
 				kfree_skb(skb);
@@ -1448,6 +1450,7 @@ alloc_new_skb:
 			length -= datalen - fraggap;
 			transhdrlen = 0;
 			exthdrlen = 0;
+			dst_exthdrlen = 0;
 			csummode = CHECKSUM_NONE;
 
 			/*
@@ -1480,13 +1483,13 @@ alloc_new_skb:
 			if (page && (left = PAGE_SIZE - off) > 0) {
 				if (copy >= left)
 					copy = left;
-				if (page != frag->page) {
+				if (page != skb_frag_page(frag)) {
 					if (i == MAX_SKB_FRAGS) {
 						err = -EMSGSIZE;
 						goto error;
 					}
-					get_page(page);
 					skb_fill_page_desc(skb, i, page, sk->sk_sndmsg_off, 0);
+					skb_frag_ref(skb, i);
 					frag = &skb_shinfo(skb)->frags[i];
 				}
 			} else if(i < MAX_SKB_FRAGS) {
@@ -1506,12 +1509,14 @@ alloc_new_skb:
 				err = -EMSGSIZE;
 				goto error;
 			}
-			if (getfrag(from, page_address(frag->page)+frag->page_offset+frag->size, offset, copy, skb->len, skb) < 0) {
+			if (getfrag(from,
+				    skb_frag_address(frag) + skb_frag_size(frag),
+				    offset, copy, skb->len, skb) < 0) {
 				err = -EFAULT;
 				goto error;
 			}
 			sk->sk_sndmsg_off += copy;
-			frag->size += copy;
+			skb_frag_size_add(frag, copy);
 			skb->len += copy;
 			skb->data_len += copy;
 			skb->truesize += copy;
diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
index 0bc98886c38..bdc15c9003d 100644
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -218,8 +218,8 @@ ip6_tnl_link(struct ip6_tnl_net *ip6n, struct ip6_tnl *t)
 {
 	struct ip6_tnl __rcu **tp = ip6_tnl_bucket(ip6n, &t->parms);
 
-	rcu_assign_pointer(t->next , rtnl_dereference(*tp));
-	rcu_assign_pointer(*tp, t);
+	RCU_INIT_POINTER(t->next , rtnl_dereference(*tp));
+	RCU_INIT_POINTER(*tp, t);
 }
 
 /**
@@ -237,7 +237,7 @@ ip6_tnl_unlink(struct ip6_tnl_net *ip6n, struct ip6_tnl *t)
 	     (iter = rtnl_dereference(*tp)) != NULL;
 	     tp = &iter->next) {
 		if (t == iter) {
-			rcu_assign_pointer(*tp, t->next);
+			RCU_INIT_POINTER(*tp, t->next);
 			break;
 		}
 	}
@@ -350,7 +350,7 @@ ip6_tnl_dev_uninit(struct net_device *dev)
 	struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id);
 
 	if (dev == ip6n->fb_tnl_dev)
-		rcu_assign_pointer(ip6n->tnls_wc[0], NULL);
+		RCU_INIT_POINTER(ip6n->tnls_wc[0], NULL);
 	else
 		ip6_tnl_unlink(ip6n, t);
 	ip6_tnl_dst_reset(t);
@@ -889,7 +889,7 @@ static int ip6_tnl_xmit2(struct sk_buff *skb,
 	struct net_device_stats *stats = &t->dev->stats;
 	struct ipv6hdr *ipv6h = ipv6_hdr(skb);
 	struct ipv6_tel_txoption opt;
-	struct dst_entry *dst;
+	struct dst_entry *dst = NULL, *ndst = NULL;
 	struct net_device *tdev;
 	int mtu;
 	unsigned int max_headroom = sizeof(struct ipv6hdr);
@@ -897,19 +897,20 @@ static int ip6_tnl_xmit2(struct sk_buff *skb,
 	int err = -1;
 	int pkt_len;
 
-	if ((dst = ip6_tnl_dst_check(t)) != NULL)
-		dst_hold(dst);
-	else {
-		dst = ip6_route_output(net, NULL, fl6);
+	if (!fl6->flowi6_mark)
+		dst = ip6_tnl_dst_check(t);
+	if (!dst) {
+		ndst = ip6_route_output(net, NULL, fl6);
 
-		if (dst->error)
+		if (ndst->error)
 			goto tx_err_link_failure;
-		dst = xfrm_lookup(net, dst, flowi6_to_flowi(fl6), NULL, 0);
-		if (IS_ERR(dst)) {
-			err = PTR_ERR(dst);
-			dst = NULL;
+		ndst = xfrm_lookup(net, ndst, flowi6_to_flowi(fl6), NULL, 0);
+		if (IS_ERR(ndst)) {
+			err = PTR_ERR(ndst);
+			ndst = NULL;
 			goto tx_err_link_failure;
 		}
+		dst = ndst;
 	}
 
 	tdev = dst->dev;
@@ -955,8 +956,12 @@ static int ip6_tnl_xmit2(struct sk_buff *skb,
 		skb = new_skb;
 	}
 	skb_dst_drop(skb);
-	skb_dst_set(skb, dst_clone(dst));
-
+	if (fl6->flowi6_mark) {
+		skb_dst_set(skb, dst);
+		ndst = NULL;
+	} else {
+		skb_dst_set_noref(skb, dst);
+	}
 	skb->transport_header = skb->network_header;
 
 	proto = fl6->flowi6_proto;
@@ -987,13 +992,14 @@ static int ip6_tnl_xmit2(struct sk_buff *skb,
 		stats->tx_errors++;
 		stats->tx_aborted_errors++;
 	}
-	ip6_tnl_dst_store(t, dst);
+	if (ndst)
+		ip6_tnl_dst_store(t, ndst);
 	return 0;
 tx_err_link_failure:
 	stats->tx_carrier_errors++;
 	dst_link_failure(skb);
 tx_err_dst_release:
-	dst_release(dst);
+	dst_release(ndst);
 	return err;
 }
 
@@ -1020,9 +1026,11 @@ ip4ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev)
 
 	dsfield = ipv4_get_dsfield(iph);
 
-	if ((t->parms.flags & IP6_TNL_F_USE_ORIG_TCLASS))
+	if (t->parms.flags & IP6_TNL_F_USE_ORIG_TCLASS)
 		fl6.flowlabel |= htonl((__u32)iph->tos << IPV6_TCLASS_SHIFT)
 					  & IPV6_TCLASS_MASK;
+	if (t->parms.flags & IP6_TNL_F_USE_ORIG_FWMARK)
+		fl6.flowi6_mark = skb->mark;
 
 	err = ip6_tnl_xmit2(skb, dev, dsfield, &fl6, encap_limit, &mtu);
 	if (err != 0) {
@@ -1069,10 +1077,12 @@ ip6ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev)
 	fl6.flowi6_proto = IPPROTO_IPV6;
 
 	dsfield = ipv6_get_dsfield(ipv6h);
-	if ((t->parms.flags & IP6_TNL_F_USE_ORIG_TCLASS))
+	if (t->parms.flags & IP6_TNL_F_USE_ORIG_TCLASS)
 		fl6.flowlabel |= (*(__be32 *) ipv6h & IPV6_TCLASS_MASK);
-	if ((t->parms.flags & IP6_TNL_F_USE_ORIG_FLOWLABEL))
+	if (t->parms.flags & IP6_TNL_F_USE_ORIG_FLOWLABEL)
 		fl6.flowlabel |= (*(__be32 *) ipv6h & IPV6_FLOWLABEL_MASK);
+	if (t->parms.flags & IP6_TNL_F_USE_ORIG_FWMARK)
+		fl6.flowi6_mark = skb->mark;
 
 	err = ip6_tnl_xmit2(skb, dev, dsfield, &fl6, encap_limit, &mtu);
 	if (err != 0) {
@@ -1439,7 +1449,7 @@ static int __net_init ip6_fb_tnl_dev_init(struct net_device *dev)
 
 	t->parms.proto = IPPROTO_IPV6;
 	dev_hold(dev);
-	rcu_assign_pointer(ip6n->tnls_wc[0], t);
+	RCU_INIT_POINTER(ip6n->tnls_wc[0], t);
 	return 0;
 }
 
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index 2fbda5fc4cc..c99e3ee9781 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -343,7 +343,7 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
 		break;
 
 	case IPV6_TRANSPARENT:
-		if (!capable(CAP_NET_ADMIN)) {
+		if (valbool && !capable(CAP_NET_ADMIN) && !capable(CAP_NET_RAW)) {
 			retv = -EPERM;
 			break;
 		}
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index 9da6e02eaae..44e5b7f2a6c 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -370,17 +370,14 @@ static int ndisc_constructor(struct neighbour *neigh)
 	struct neigh_parms *parms;
 	int is_multicast = ipv6_addr_is_multicast(addr);
 
-	rcu_read_lock();
 	in6_dev = in6_dev_get(dev);
 	if (in6_dev == NULL) {
-		rcu_read_unlock();
 		return -EINVAL;
 	}
 
 	parms = in6_dev->nd_parms;
 	__neigh_parms_put(neigh->parms);
 	neigh->parms = neigh_parms_clone(parms);
-	rcu_read_unlock();
 
 	neigh->type = is_multicast ? RTN_MULTICAST : RTN_UNICAST;
 	if (!dev->header_ops) {
@@ -533,7 +530,8 @@ void ndisc_send_skb(struct sk_buff *skb,
 
 	skb_dst_set(skb, dst);
 
-	idev = in6_dev_get(dst->dev);
+	rcu_read_lock();
+	idev = __in6_dev_get(dst->dev);
 	IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUT, skb->len);
 
 	err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL, dst->dev,
@@ -543,8 +541,7 @@ void ndisc_send_skb(struct sk_buff *skb,
 		ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS);
 	}
 
-	if (likely(idev != NULL))
-		in6_dev_put(idev);
+	rcu_read_unlock();
 }
 
 EXPORT_SYMBOL(ndisc_send_skb);
@@ -1039,7 +1036,7 @@ static void ndisc_recv_rs(struct sk_buff *skb)
 	if (skb->len < sizeof(*rs_msg))
 		return;
 
-	idev = in6_dev_get(skb->dev);
+	idev = __in6_dev_get(skb->dev);
 	if (!idev) {
 		if (net_ratelimit())
 			ND_PRINTK1("ICMP6 RS: can't find in6 device\n");
@@ -1080,7 +1077,7 @@ static void ndisc_recv_rs(struct sk_buff *skb)
 		neigh_release(neigh);
 	}
 out:
-	in6_dev_put(idev);
+	return;
 }
 
 static void ndisc_ra_useropt(struct sk_buff *ra, struct nd_opt_hdr *opt)
@@ -1179,7 +1176,7 @@ static void ndisc_router_discovery(struct sk_buff *skb)
 	 *	set the RA_RECV flag in the interface
 	 */
 
-	in6_dev = in6_dev_get(skb->dev);
+	in6_dev = __in6_dev_get(skb->dev);
 	if (in6_dev == NULL) {
 		ND_PRINTK0(KERN_ERR
 			   "ICMPv6 RA: can't find inet6 device for %s.\n",
@@ -1188,7 +1185,6 @@ static void ndisc_router_discovery(struct sk_buff *skb)
 	}
 
 	if (!ndisc_parse_options(opt, optlen, &ndopts)) {
-		in6_dev_put(in6_dev);
 		ND_PRINTK2(KERN_WARNING
 			   "ICMP6 RA: invalid ND options\n");
 		return;
@@ -1225,6 +1221,9 @@ static void ndisc_router_discovery(struct sk_buff *skb)
 	if (!in6_dev->cnf.accept_ra_defrtr)
 		goto skip_defrtr;
 
+	if (ipv6_chk_addr(dev_net(in6_dev->dev), &ipv6_hdr(skb)->saddr, NULL, 0))
+		goto skip_defrtr;
+
 	lifetime = ntohs(ra_msg->icmph.icmp6_rt_lifetime);
 
 #ifdef CONFIG_IPV6_ROUTER_PREF
@@ -1255,7 +1254,6 @@ static void ndisc_router_discovery(struct sk_buff *skb)
 			ND_PRINTK0(KERN_ERR
 				   "ICMPv6 RA: %s() failed to add default route.\n",
 				   __func__);
-			in6_dev_put(in6_dev);
 			return;
 		}
 
@@ -1265,7 +1263,6 @@ static void ndisc_router_discovery(struct sk_buff *skb)
 				   "ICMPv6 RA: %s() got default router without neighbour.\n",
 				   __func__);
 			dst_release(&rt->dst);
-			in6_dev_put(in6_dev);
 			return;
 		}
 		neigh->flags |= NTF_ROUTER;
@@ -1349,6 +1346,9 @@ skip_linkparms:
 		goto out;
 
 #ifdef CONFIG_IPV6_ROUTE_INFO
+	if (ipv6_chk_addr(dev_net(in6_dev->dev), &ipv6_hdr(skb)->saddr, NULL, 0))
+		goto skip_routeinfo;
+
 	if (in6_dev->cnf.accept_ra_rtr_pref && ndopts.nd_opts_ri) {
 		struct nd_opt_hdr *p;
 		for (p = ndopts.nd_opts_ri;
@@ -1366,6 +1366,8 @@ skip_linkparms:
 				      &ipv6_hdr(skb)->saddr);
 		}
 	}
+
+skip_routeinfo:
 #endif
 
 #ifdef CONFIG_IPV6_NDISC_NODETYPE
@@ -1422,7 +1424,6 @@ out:
 		dst_release(&rt->dst);
 	else if (neigh)
 		neigh_release(neigh);
-	in6_dev_put(in6_dev);
 }
 
 static void ndisc_redirect_rcv(struct sk_buff *skb)
@@ -1481,13 +1482,11 @@ static void ndisc_redirect_rcv(struct sk_buff *skb)
 		return;
 	}
 
-	in6_dev = in6_dev_get(skb->dev);
+	in6_dev = __in6_dev_get(skb->dev);
 	if (!in6_dev)
 		return;
-	if (in6_dev->cnf.forwarding || !in6_dev->cnf.accept_redirects) {
-		in6_dev_put(in6_dev);
+	if (in6_dev->cnf.forwarding || !in6_dev->cnf.accept_redirects)
 		return;
-	}
 
 	/* RFC2461 8.1:
 	 *	The IP source address of the Redirect MUST be the same as the current
@@ -1497,7 +1496,6 @@ static void ndisc_redirect_rcv(struct sk_buff *skb)
 	if (!ndisc_parse_options((u8*)(dest + 1), optlen, &ndopts)) {
 		ND_PRINTK2(KERN_WARNING
 			   "ICMPv6 Redirect: invalid ND options\n");
-		in6_dev_put(in6_dev);
 		return;
 	}
 	if (ndopts.nd_opts_tgt_lladdr) {
@@ -1506,7 +1504,6 @@ static void ndisc_redirect_rcv(struct sk_buff *skb)
 		if (!lladdr) {
 			ND_PRINTK2(KERN_WARNING
 				   "ICMPv6 Redirect: invalid link-layer address length\n");
-			in6_dev_put(in6_dev);
 			return;
 		}
 	}
@@ -1518,7 +1515,6 @@ static void ndisc_redirect_rcv(struct sk_buff *skb)
 			     on_link);
 		neigh_release(neigh);
 	}
-	in6_dev_put(in6_dev);
 }
 
 void ndisc_send_redirect(struct sk_buff *skb, struct neighbour *neigh,
@@ -1651,7 +1647,8 @@ void ndisc_send_redirect(struct sk_buff *skb, struct neighbour *neigh,
 					     csum_partial(icmph, len, 0));
 
 	skb_dst_set(buff, dst);
-	idev = in6_dev_get(dst->dev);
+	rcu_read_lock();
+	idev = __in6_dev_get(dst->dev);
 	IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUT, skb->len);
 	err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, buff, NULL, dst->dev,
 		      dst_output);
@@ -1660,8 +1657,7 @@ void ndisc_send_redirect(struct sk_buff *skb, struct neighbour *neigh,
 		ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS);
 	}
 
-	if (likely(idev != NULL))
-		in6_dev_put(idev);
+	rcu_read_unlock();
 	return;
 
 release:
diff --git a/net/ipv6/netfilter/nf_conntrack_reasm.c b/net/ipv6/netfilter/nf_conntrack_reasm.c
index 08572726381..e8762c73b17 100644
--- a/net/ipv6/netfilter/nf_conntrack_reasm.c
+++ b/net/ipv6/netfilter/nf_conntrack_reasm.c
@@ -378,8 +378,8 @@ nf_ct_frag6_reasm(struct nf_ct_frag6_queue *fq, struct net_device *dev)
 		head->next = clone;
 		skb_shinfo(clone)->frag_list = skb_shinfo(head)->frag_list;
 		skb_frag_list_init(head);
-		for (i=0; i<skb_shinfo(head)->nr_frags; i++)
-			plen += skb_shinfo(head)->frags[i].size;
+		for (i = 0; i < skb_shinfo(head)->nr_frags; i++)
+			plen += skb_frag_size(&skb_shinfo(head)->frags[i]);
 		clone->len = clone->data_len = head->data_len - plen;
 		head->data_len -= clone->len;
 		head->len -= clone->len;
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index 343852e5c70..6f7824e1cea 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -130,14 +130,14 @@ static mh_filter_t __rcu *mh_filter __read_mostly;
 
 int rawv6_mh_filter_register(mh_filter_t filter)
 {
-	rcu_assign_pointer(mh_filter, filter);
+	RCU_INIT_POINTER(mh_filter, filter);
 	return 0;
 }
 EXPORT_SYMBOL(rawv6_mh_filter_register);
 
 int rawv6_mh_filter_unregister(mh_filter_t filter)
 {
-	rcu_assign_pointer(mh_filter, NULL);
+	RCU_INIT_POINTER(mh_filter, NULL);
 	synchronize_rcu();
 	return 0;
 }
@@ -372,9 +372,9 @@ void raw6_icmp_error(struct sk_buff *skb, int nexthdr,
 	read_unlock(&raw_v6_hashinfo.lock);
 }
 
-static inline int rawv6_rcv_skb(struct sock * sk, struct sk_buff * skb)
+static inline int rawv6_rcv_skb(struct sock *sk, struct sk_buff *skb)
 {
-	if ((raw6_sk(sk)->checksum || rcu_dereference_raw(sk->sk_filter)) &&
+	if ((raw6_sk(sk)->checksum || rcu_access_pointer(sk->sk_filter)) &&
 	    skb_checksum_complete(skb)) {
 		atomic_inc(&sk->sk_drops);
 		kfree_skb(skb);
@@ -542,8 +542,7 @@ static int rawv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6,
 		goto out;
 
 	offset = rp->offset;
-	total_len = inet_sk(sk)->cork.base.length - (skb_network_header(skb) -
-						     skb->data);
+	total_len = inet_sk(sk)->cork.base.length;
 	if (offset >= total_len - 1) {
 		err = -EINVAL;
 		ip6_flush_pending_frames(sk);
diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c
index 7b954e2539d..cc22099ac8b 100644
--- a/net/ipv6/reassembly.c
+++ b/net/ipv6/reassembly.c
@@ -464,8 +464,8 @@ static int ip6_frag_reasm(struct frag_queue *fq, struct sk_buff *prev,
 		head->next = clone;
 		skb_shinfo(clone)->frag_list = skb_shinfo(head)->frag_list;
 		skb_frag_list_init(head);
-		for (i=0; i<skb_shinfo(head)->nr_frags; i++)
-			plen += skb_shinfo(head)->frags[i].size;
+		for (i = 0; i < skb_shinfo(head)->nr_frags; i++)
+			plen += skb_frag_size(&skb_shinfo(head)->frags[i]);
 		clone->len = clone->data_len = head->data_len - plen;
 		head->data_len -= clone->len;
 		head->len -= clone->len;
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index fb545edef6e..57b82dc1ae9 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -1086,11 +1086,10 @@ struct dst_entry *icmp6_dst_alloc(struct net_device *dev,
 	rt->dst.output  = ip6_output;
 	dst_set_neighbour(&rt->dst, neigh);
 	atomic_set(&rt->dst.__refcnt, 1);
-	dst_metric_set(&rt->dst, RTAX_HOPLIMIT, 255);
-
 	ipv6_addr_copy(&rt->rt6i_dst.addr, addr);
 	rt->rt6i_dst.plen = 128;
 	rt->rt6i_idev     = idev;
+	dst_metric_set(&rt->dst, RTAX_HOPLIMIT, 255);
 
 	spin_lock_bh(&icmp6_dst_lock);
 	rt->dst.next = icmp6_dst_gc_list;
diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index 00b15ac7a70..a7a18602a04 100644
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -182,7 +182,7 @@ static void ipip6_tunnel_unlink(struct sit_net *sitn, struct ip_tunnel *t)
 	     (iter = rtnl_dereference(*tp)) != NULL;
 	     tp = &iter->next) {
 		if (t == iter) {
-			rcu_assign_pointer(*tp, t->next);
+			RCU_INIT_POINTER(*tp, t->next);
 			break;
 		}
 	}
@@ -192,8 +192,8 @@ static void ipip6_tunnel_link(struct sit_net *sitn, struct ip_tunnel *t)
 {
 	struct ip_tunnel __rcu **tp = ipip6_bucket(sitn, t);
 
-	rcu_assign_pointer(t->next, rtnl_dereference(*tp));
-	rcu_assign_pointer(*tp, t);
+	RCU_INIT_POINTER(t->next, rtnl_dereference(*tp));
+	RCU_INIT_POINTER(*tp, t);
 }
 
 static void ipip6_tunnel_clone_6rd(struct net_device *dev, struct sit_net *sitn)
@@ -391,7 +391,7 @@ ipip6_tunnel_add_prl(struct ip_tunnel *t, struct ip_tunnel_prl *a, int chg)
 	p->addr = a->addr;
 	p->flags = a->flags;
 	t->prl_count++;
-	rcu_assign_pointer(t->prl, p);
+	RCU_INIT_POINTER(t->prl, p);
 out:
 	return err;
 }
@@ -474,7 +474,7 @@ static void ipip6_tunnel_uninit(struct net_device *dev)
 	struct sit_net *sitn = net_generic(net, sit_net_id);
 
 	if (dev == sitn->fb_tunnel_dev) {
-		rcu_assign_pointer(sitn->tunnels_wc[0], NULL);
+		RCU_INIT_POINTER(sitn->tunnels_wc[0], NULL);
 	} else {
 		ipip6_tunnel_unlink(sitn, netdev_priv(dev));
 		ipip6_tunnel_del_prl(netdev_priv(dev), NULL);
@@ -1176,7 +1176,7 @@ static int __net_init ipip6_fb_tunnel_init(struct net_device *dev)
 	if (!dev->tstats)
 		return -ENOMEM;
 	dev_hold(dev);
-	rcu_assign_pointer(sitn->tunnels_wc[0], tunnel);
+	RCU_INIT_POINTER(sitn->tunnels_wc[0], tunnel);
 	return 0;
 }
 
diff --git a/net/ipv6/syncookies.c b/net/ipv6/syncookies.c
index ac838965ff3..5a0d6648bbb 100644
--- a/net/ipv6/syncookies.c
+++ b/net/ipv6/syncookies.c
@@ -115,7 +115,7 @@ static __u32 check_tcp_syn_cookie(__u32 cookie, const struct in6_addr *saddr,
 		& COOKIEMASK;
 }
 
-__u32 cookie_v6_init_sequence(struct sock *sk, struct sk_buff *skb, __u16 *mssp)
+__u32 cookie_v6_init_sequence(struct sock *sk, const struct sk_buff *skb, __u16 *mssp)
 {
 	const struct ipv6hdr *iph = ipv6_hdr(skb);
 	const struct tcphdr *th = tcp_hdr(skb);
@@ -137,7 +137,7 @@ __u32 cookie_v6_init_sequence(struct sock *sk, struct sk_buff *skb, __u16 *mssp)
 				     jiffies / (HZ * 60), mssind);
 }
 
-static inline int cookie_check(struct sk_buff *skb, __u32 cookie)
+static inline int cookie_check(const struct sk_buff *skb, __u32 cookie)
 {
 	const struct ipv6hdr *iph = ipv6_hdr(skb);
 	const struct tcphdr *th = tcp_hdr(skb);
@@ -152,7 +152,7 @@ static inline int cookie_check(struct sk_buff *skb, __u32 cookie)
 struct sock *cookie_v6_check(struct sock *sk, struct sk_buff *skb)
 {
 	struct tcp_options_received tcp_opt;
-	u8 *hash_location;
+	const u8 *hash_location;
 	struct inet_request_sock *ireq;
 	struct inet6_request_sock *ireq6;
 	struct tcp_request_sock *treq;
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 7b8fc579435..10b2b3165a1 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -114,7 +114,7 @@ static __inline__ __sum16 tcp_v6_check(int len,
 	return csum_ipv6_magic(saddr, daddr, len, IPPROTO_TCP, base);
 }
 
-static __u32 tcp_v6_init_sequence(struct sk_buff *skb)
+static __u32 tcp_v6_init_sequence(const struct sk_buff *skb)
 {
 	return secure_tcpv6_sequence_number(ipv6_hdr(skb)->daddr.s6_addr32,
 					    ipv6_hdr(skb)->saddr.s6_addr32,
@@ -513,7 +513,7 @@ static int tcp_v6_send_synack(struct sock *sk, struct request_sock *req,
 		__tcp_v6_send_check(skb, &treq->loc_addr, &treq->rmt_addr);
 
 		ipv6_addr_copy(&fl6.daddr, &treq->rmt_addr);
-		err = ip6_xmit(sk, skb, &fl6, opt);
+		err = ip6_xmit(sk, skb, &fl6, opt, np->tclass);
 		err = net_xmit_eval(err);
 	}
 
@@ -761,7 +761,7 @@ 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,
 			       const struct in6_addr *daddr, struct in6_addr *saddr,
-			       struct tcphdr *th)
+			       const struct tcphdr *th)
 {
 	struct tcp_md5sig_pool *hp;
 	struct hash_desc *desc;
@@ -793,13 +793,14 @@ clear_hash_noput:
 }
 
 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)
+			       const struct sock *sk,
+			       const struct request_sock *req,
+			       const struct sk_buff *skb)
 {
 	const struct in6_addr *saddr, *daddr;
 	struct tcp_md5sig_pool *hp;
 	struct hash_desc *desc;
-	struct tcphdr *th = tcp_hdr(skb);
+	const struct tcphdr *th = tcp_hdr(skb);
 
 	if (sk) {
 		saddr = &inet6_sk(sk)->saddr;
@@ -842,12 +843,12 @@ clear_hash_noput:
 	return 1;
 }
 
-static int tcp_v6_inbound_md5_hash (struct sock *sk, struct sk_buff *skb)
+static int tcp_v6_inbound_md5_hash(struct sock *sk, const struct sk_buff *skb)
 {
-	__u8 *hash_location = NULL;
+	const __u8 *hash_location = NULL;
 	struct tcp_md5sig_key *hash_expected;
 	const struct ipv6hdr *ip6h = ipv6_hdr(skb);
-	struct tcphdr *th = tcp_hdr(skb);
+	const struct tcphdr *th = tcp_hdr(skb);
 	int genhash;
 	u8 newhash[16];
 
@@ -978,9 +979,10 @@ static int tcp6_gro_complete(struct sk_buff *skb)
 }
 
 static void tcp_v6_send_response(struct sk_buff *skb, u32 seq, u32 ack, u32 win,
-				 u32 ts, struct tcp_md5sig_key *key, int rst)
+				 u32 ts, struct tcp_md5sig_key *key, int rst, u8 tclass)
 {
-	struct tcphdr *th = tcp_hdr(skb), *t1;
+	const struct tcphdr *th = tcp_hdr(skb);
+	struct tcphdr *t1;
 	struct sk_buff *buff;
 	struct flowi6 fl6;
 	struct net *net = dev_net(skb_dst(skb)->dev);
@@ -1058,7 +1060,7 @@ static void tcp_v6_send_response(struct sk_buff *skb, u32 seq, u32 ack, u32 win,
 	dst = ip6_dst_lookup_flow(ctl_sk, &fl6, NULL, false);
 	if (!IS_ERR(dst)) {
 		skb_dst_set(buff, dst);
-		ip6_xmit(ctl_sk, buff, &fl6, NULL);
+		ip6_xmit(ctl_sk, buff, &fl6, NULL, tclass);
 		TCP_INC_STATS_BH(net, TCP_MIB_OUTSEGS);
 		if (rst)
 			TCP_INC_STATS_BH(net, TCP_MIB_OUTRSTS);
@@ -1070,7 +1072,7 @@ static void tcp_v6_send_response(struct sk_buff *skb, u32 seq, u32 ack, u32 win,
 
 static void tcp_v6_send_reset(struct sock *sk, struct sk_buff *skb)
 {
-	struct tcphdr *th = tcp_hdr(skb);
+	const struct tcphdr *th = tcp_hdr(skb);
 	u32 seq = 0, ack_seq = 0;
 	struct tcp_md5sig_key *key = NULL;
 
@@ -1091,13 +1093,13 @@ static void tcp_v6_send_reset(struct sock *sk, struct sk_buff *skb)
 		ack_seq = ntohl(th->seq) + th->syn + th->fin + skb->len -
 			  (th->doff << 2);
 
-	tcp_v6_send_response(skb, seq, ack_seq, 0, 0, key, 1);
+	tcp_v6_send_response(skb, seq, ack_seq, 0, 0, key, 1, 0);
 }
 
 static void tcp_v6_send_ack(struct sk_buff *skb, u32 seq, u32 ack, u32 win, u32 ts,
-			    struct tcp_md5sig_key *key)
+			    struct tcp_md5sig_key *key, u8 tclass)
 {
-	tcp_v6_send_response(skb, seq, ack, win, ts, key, 0);
+	tcp_v6_send_response(skb, seq, ack, win, ts, key, 0, tclass);
 }
 
 static void tcp_v6_timewait_ack(struct sock *sk, struct sk_buff *skb)
@@ -1107,7 +1109,8 @@ static void tcp_v6_timewait_ack(struct sock *sk, struct sk_buff *skb)
 
 	tcp_v6_send_ack(skb, tcptw->tw_snd_nxt, tcptw->tw_rcv_nxt,
 			tcptw->tw_rcv_wnd >> tw->tw_rcv_wscale,
-			tcptw->tw_ts_recent, tcp_twsk_md5_key(tcptw));
+			tcptw->tw_ts_recent, tcp_twsk_md5_key(tcptw),
+			tw->tw_tclass);
 
 	inet_twsk_put(tw);
 }
@@ -1116,7 +1119,7 @@ static void tcp_v6_reqsk_send_ack(struct sock *sk, struct sk_buff *skb,
 				  struct request_sock *req)
 {
 	tcp_v6_send_ack(skb, tcp_rsk(req)->snt_isn + 1, tcp_rsk(req)->rcv_isn + 1, req->rcv_wnd, req->ts_recent,
-			tcp_v6_md5_do_lookup(sk, &ipv6_hdr(skb)->daddr));
+			tcp_v6_md5_do_lookup(sk, &ipv6_hdr(skb)->daddr), 0);
 }
 
 
@@ -1160,7 +1163,7 @@ static int tcp_v6_conn_request(struct sock *sk, struct sk_buff *skb)
 {
 	struct tcp_extend_values tmp_ext;
 	struct tcp_options_received tmp_opt;
-	u8 *hash_location;
+	const u8 *hash_location;
 	struct request_sock *req;
 	struct inet6_request_sock *treq;
 	struct ipv6_pinfo *np = inet6_sk(sk);
@@ -1608,7 +1611,7 @@ static int tcp_v6_do_rcv(struct sock *sk, struct sk_buff *skb)
 		opt_skb = skb_clone(skb, GFP_ATOMIC);
 
 	if (sk->sk_state == TCP_ESTABLISHED) { /* Fast path */
-		sock_rps_save_rxhash(sk, skb->rxhash);
+		sock_rps_save_rxhash(sk, skb);
 		if (tcp_rcv_established(sk, skb, tcp_hdr(skb), skb->len))
 			goto reset;
 		if (opt_skb)
@@ -1630,7 +1633,7 @@ static int tcp_v6_do_rcv(struct sock *sk, struct sk_buff *skb)
 		 * the new socket..
 		 */
 		if(nsk != sk) {
-			sock_rps_save_rxhash(nsk, skb->rxhash);
+			sock_rps_save_rxhash(nsk, skb);
 			if (tcp_child_process(sk, nsk, skb))
 				goto reset;
 			if (opt_skb)
@@ -1638,7 +1641,7 @@ static int tcp_v6_do_rcv(struct sock *sk, struct sk_buff *skb)
 			return 0;
 		}
 	} else
-		sock_rps_save_rxhash(sk, skb->rxhash);
+		sock_rps_save_rxhash(sk, skb);
 
 	if (tcp_rcv_state_process(sk, skb, tcp_hdr(skb), skb->len))
 		goto reset;
@@ -1688,7 +1691,7 @@ ipv6_pktoptions:
 
 static int tcp_v6_rcv(struct sk_buff *skb)
 {
-	struct tcphdr *th;
+	const struct tcphdr *th;
 	const struct ipv6hdr *hdr;
 	struct sock *sk;
 	int ret;
@@ -1722,7 +1725,7 @@ static int tcp_v6_rcv(struct sk_buff *skb)
 				    skb->len - th->doff*4);
 	TCP_SKB_CB(skb)->ack_seq = ntohl(th->ack_seq);
 	TCP_SKB_CB(skb)->when = 0;
-	TCP_SKB_CB(skb)->flags = ipv6_get_dsfield(hdr);
+	TCP_SKB_CB(skb)->ip_dsfield = ipv6_get_dsfield(hdr);
 	TCP_SKB_CB(skb)->sacked = 0;
 
 	sk = __inet6_lookup_skb(&tcp_hashinfo, skb, th->source, th->dest);
@@ -1856,8 +1859,8 @@ static struct inet_peer *tcp_v6_get_peer(struct sock *sk, bool *release_it)
 
 static void *tcp_v6_tw_get_peer(struct sock *sk)
 {
-	struct inet6_timewait_sock *tw6 = inet6_twsk(sk);
-	struct inet_timewait_sock *tw = inet_twsk(sk);
+	const struct inet6_timewait_sock *tw6 = inet6_twsk(sk);
+	const struct inet_timewait_sock *tw = inet_twsk(sk);
 
 	if (tw->tw_family == AF_INET)
 		return tcp_v4_tw_get_peer(sk);
@@ -2012,7 +2015,7 @@ static void tcp_v6_destroy_sock(struct sock *sk)
 #ifdef CONFIG_PROC_FS
 /* Proc filesystem TCPv6 sock list dumping. */
 static void get_openreq6(struct seq_file *seq,
-			 struct sock *sk, struct request_sock *req, int i, int uid)
+			 const struct sock *sk, struct request_sock *req, int i, int uid)
 {
 	int ttd = req->expires - jiffies;
 	const struct in6_addr *src = &inet6_rsk(req)->loc_addr;
@@ -2048,10 +2051,10 @@ static void get_tcp6_sock(struct seq_file *seq, struct sock *sp, int i)
 	__u16 destp, srcp;
 	int timer_active;
 	unsigned long timer_expires;
-	struct inet_sock *inet = inet_sk(sp);
-	struct tcp_sock *tp = tcp_sk(sp);
+	const struct inet_sock *inet = inet_sk(sp);
+	const struct tcp_sock *tp = tcp_sk(sp);
 	const struct inet_connection_sock *icsk = inet_csk(sp);
-	struct ipv6_pinfo *np = inet6_sk(sp);
+	const struct ipv6_pinfo *np = inet6_sk(sp);
 
 	dest  = &np->daddr;
 	src   = &np->rcv_saddr;
@@ -2103,7 +2106,7 @@ static void get_timewait6_sock(struct seq_file *seq,
 {
 	const struct in6_addr *dest, *src;
 	__u16 destp, srcp;
-	struct inet6_timewait_sock *tw6 = inet6_twsk((struct sock *)tw);
+	const struct inet6_timewait_sock *tw6 = inet6_twsk((struct sock *)tw);
 	int ttd = tw->tw_ttd - jiffies;
 
 	if (ttd < 0)
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index bb95e8e1c6f..f4ca0a5b345 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -509,7 +509,7 @@ int udpv6_queue_rcv_skb(struct sock * sk, struct sk_buff *skb)
 	int is_udplite = IS_UDPLITE(sk);
 
 	if (!ipv6_addr_any(&inet6_sk(sk)->daddr))
-		sock_rps_save_rxhash(sk, skb->rxhash);
+		sock_rps_save_rxhash(sk, skb);
 
 	if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb))
 		goto drop;
@@ -533,7 +533,7 @@ int udpv6_queue_rcv_skb(struct sock * sk, struct sk_buff *skb)
 		}
 	}
 
-	if (rcu_dereference_raw(sk->sk_filter)) {
+	if (rcu_access_pointer(sk->sk_filter)) {
 		if (udp_lib_checksum_complete(skb))
 			goto drop;
 	}
diff --git a/net/ipv6/xfrm6_output.c b/net/ipv6/xfrm6_output.c
index 49a91c5f562..faae41737fc 100644
--- a/net/ipv6/xfrm6_output.c
+++ b/net/ipv6/xfrm6_output.c
@@ -28,6 +28,43 @@ int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
 
 EXPORT_SYMBOL(xfrm6_find_1stfragopt);
 
+static int xfrm6_local_dontfrag(struct sk_buff *skb)
+{
+	int proto;
+	struct sock *sk = skb->sk;
+
+	if (sk) {
+		proto = sk->sk_protocol;
+
+		if (proto == IPPROTO_UDP || proto == IPPROTO_RAW)
+			return inet6_sk(sk)->dontfrag;
+	}
+
+	return 0;
+}
+
+static void xfrm6_local_rxpmtu(struct sk_buff *skb, u32 mtu)
+{
+	struct flowi6 fl6;
+	struct sock *sk = skb->sk;
+
+	fl6.flowi6_oif = sk->sk_bound_dev_if;
+	ipv6_addr_copy(&fl6.daddr, &ipv6_hdr(skb)->daddr);
+
+	ipv6_local_rxpmtu(sk, &fl6, mtu);
+}
+
+static void xfrm6_local_error(struct sk_buff *skb, u32 mtu)
+{
+	struct flowi6 fl6;
+	struct sock *sk = skb->sk;
+
+	fl6.fl6_dport = inet_sk(sk)->inet_dport;
+	ipv6_addr_copy(&fl6.daddr, &ipv6_hdr(skb)->daddr);
+
+	ipv6_local_error(sk, EMSGSIZE, &fl6, mtu);
+}
+
 static int xfrm6_tunnel_check_size(struct sk_buff *skb)
 {
 	int mtu, ret = 0;
@@ -39,7 +76,13 @@ static int xfrm6_tunnel_check_size(struct sk_buff *skb)
 
 	if (!skb->local_df && skb->len > mtu) {
 		skb->dev = dst->dev;
-		icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
+
+		if (xfrm6_local_dontfrag(skb))
+			xfrm6_local_rxpmtu(skb, mtu);
+		else if (skb->sk)
+			xfrm6_local_error(skb, mtu);
+		else
+			icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
 		ret = -EMSGSIZE;
 	}
 
@@ -93,9 +136,18 @@ static int __xfrm6_output(struct sk_buff *skb)
 {
 	struct dst_entry *dst = skb_dst(skb);
 	struct xfrm_state *x = dst->xfrm;
+	int mtu = ip6_skb_dst_mtu(skb);
+
+	if (skb->len > mtu && xfrm6_local_dontfrag(skb)) {
+		xfrm6_local_rxpmtu(skb, mtu);
+		return -EMSGSIZE;
+	} else if (!skb->local_df && skb->len > mtu && skb->sk) {
+		xfrm6_local_error(skb, mtu);
+		return -EMSGSIZE;
+	}
 
 	if ((x && x->props.mode == XFRM_MODE_TUNNEL) &&
-	    ((skb->len > ip6_skb_dst_mtu(skb) && !skb_is_gso(skb)) ||
+	    ((skb->len > mtu && !skb_is_gso(skb)) ||
 		dst_allfrag(skb_dst(skb)))) {
 			return ip6_fragment(skb, x->outer_mode->afinfo->output_finish);
 	}