net: skb->dst accessors

Define three accessors to get/set dst attached to a skb

struct dst_entry *skb_dst(const struct sk_buff *skb)

void skb_dst_set(struct sk_buff *skb, struct dst_entry *dst)

void skb_dst_drop(struct sk_buff *skb)
This one should replace occurrences of :
dst_release(skb->dst)
skb->dst = NULL;

Delete skb->dst field

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

18 files changed, 139 insertions, 133 deletions

diff --git a/net/ipv6/exthdrs.c b/net/ipv6/exthdrs.c
index 1c7f400..4aae658 100644
--- a/net/ipv6/exthdrs.c
+++ b/net/ipv6/exthdrs.c
@@ -277,7 +277,7 @@ static int ipv6_destopt_rcv(struct sk_buff *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->dev), ip6_dst_idev(skb->dst),
+		IP6_INC_STATS_BH(dev_net(skb_dst(skb)->dev), ip6_dst_idev(skb_dst(skb)),
 				 IPSTATS_MIB_INHDRERRORS);
 		kfree_skb(skb);
 		return -1;
@@ -288,7 +288,7 @@ static int ipv6_destopt_rcv(struct sk_buff *skb)
 	dstbuf = opt->dst1;
 #endif
 
-	dst = dst_clone(skb->dst);
+	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;
@@ -333,7 +333,7 @@ static int ipv6_rthdr_rcv(struct sk_buff *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(net, ip6_dst_idev(skb->dst),
+		IP6_INC_STATS_BH(net, ip6_dst_idev(skb_dst(skb)),
 				 IPSTATS_MIB_INHDRERRORS);
 		kfree_skb(skb);
 		return -1;
@@ -343,7 +343,7 @@ static int ipv6_rthdr_rcv(struct sk_buff *skb)
 
 	if (ipv6_addr_is_multicast(&ipv6_hdr(skb)->daddr) ||
 	    skb->pkt_type != PACKET_HOST) {
-		IP6_INC_STATS_BH(net, ip6_dst_idev(skb->dst),
+		IP6_INC_STATS_BH(net, ip6_dst_idev(skb_dst(skb)),
 				 IPSTATS_MIB_INADDRERRORS);
 		kfree_skb(skb);
 		return -1;
@@ -358,7 +358,7 @@ looped_back:
 			 * processed by own
 			 */
 			if (!addr) {
-				IP6_INC_STATS_BH(net, ip6_dst_idev(skb->dst),
+				IP6_INC_STATS_BH(net, ip6_dst_idev(skb_dst(skb)),
 						 IPSTATS_MIB_INADDRERRORS);
 				kfree_skb(skb);
 				return -1;
@@ -384,7 +384,7 @@ looped_back:
 			goto unknown_rh;
 		/* Silently discard invalid RTH type 2 */
 		if (hdr->hdrlen != 2 || hdr->segments_left != 1) {
-			IP6_INC_STATS_BH(net, ip6_dst_idev(skb->dst),
+			IP6_INC_STATS_BH(net, ip6_dst_idev(skb_dst(skb)),
 					 IPSTATS_MIB_INHDRERRORS);
 			kfree_skb(skb);
 			return -1;
@@ -403,7 +403,7 @@ looped_back:
 	n = hdr->hdrlen >> 1;
 
 	if (hdr->segments_left > n) {
-		IP6_INC_STATS_BH(net, ip6_dst_idev(skb->dst),
+		IP6_INC_STATS_BH(net, ip6_dst_idev(skb_dst(skb)),
 				 IPSTATS_MIB_INHDRERRORS);
 		icmpv6_param_prob(skb, ICMPV6_HDR_FIELD,
 				  ((&hdr->segments_left) -
@@ -417,7 +417,7 @@ looped_back:
 	if (skb_cloned(skb)) {
 		/* the copy is a forwarded packet */
 		if (pskb_expand_head(skb, 0, 0, GFP_ATOMIC)) {
-			IP6_INC_STATS_BH(net, ip6_dst_idev(skb->dst),
+			IP6_INC_STATS_BH(net, ip6_dst_idev(skb_dst(skb)),
 					 IPSTATS_MIB_OUTDISCARDS);
 			kfree_skb(skb);
 			return -1;
@@ -440,13 +440,13 @@ looped_back:
 		if (xfrm6_input_addr(skb, (xfrm_address_t *)addr,
 				     (xfrm_address_t *)&ipv6_hdr(skb)->saddr,
 				     IPPROTO_ROUTING) < 0) {
-			IP6_INC_STATS_BH(net, ip6_dst_idev(skb->dst),
+			IP6_INC_STATS_BH(net, ip6_dst_idev(skb_dst(skb)),
 					 IPSTATS_MIB_INADDRERRORS);
 			kfree_skb(skb);
 			return -1;
 		}
-		if (!ipv6_chk_home_addr(dev_net(skb->dst->dev), addr)) {
-			IP6_INC_STATS_BH(net, ip6_dst_idev(skb->dst),
+		if (!ipv6_chk_home_addr(dev_net(skb_dst(skb)->dev), addr)) {
+			IP6_INC_STATS_BH(net, ip6_dst_idev(skb_dst(skb)),
 					 IPSTATS_MIB_INADDRERRORS);
 			kfree_skb(skb);
 			return -1;
@@ -458,7 +458,7 @@ looped_back:
 	}
 
 	if (ipv6_addr_is_multicast(addr)) {
-		IP6_INC_STATS_BH(net, ip6_dst_idev(skb->dst),
+		IP6_INC_STATS_BH(net, ip6_dst_idev(skb_dst(skb)),
 				 IPSTATS_MIB_INADDRERRORS);
 		kfree_skb(skb);
 		return -1;
@@ -468,17 +468,17 @@ looped_back:
 	ipv6_addr_copy(addr, &ipv6_hdr(skb)->daddr);
 	ipv6_addr_copy(&ipv6_hdr(skb)->daddr, &daddr);
 
-	dst_release(xchg(&skb->dst, NULL));
+	skb_dst_drop(skb);
 	ip6_route_input(skb);
-	if (skb->dst->error) {
+	if (skb_dst(skb)->error) {
 		skb_push(skb, skb->data - skb_network_header(skb));
 		dst_input(skb);
 		return -1;
 	}
 
-	if (skb->dst->dev->flags&IFF_LOOPBACK) {
+	if (skb_dst(skb)->dev->flags&IFF_LOOPBACK) {
 		if (ipv6_hdr(skb)->hop_limit <= 1) {
-			IP6_INC_STATS_BH(net, ip6_dst_idev(skb->dst),
+			IP6_INC_STATS_BH(net, ip6_dst_idev(skb_dst(skb)),
 					 IPSTATS_MIB_INHDRERRORS);
 			icmpv6_send(skb, ICMPV6_TIME_EXCEED, ICMPV6_EXC_HOPLIMIT,
 				    0, skb->dev);
@@ -494,7 +494,7 @@ looped_back:
 	return -1;
 
 unknown_rh:
-	IP6_INC_STATS_BH(net, ip6_dst_idev(skb->dst), IPSTATS_MIB_INHDRERRORS);
+	IP6_INC_STATS_BH(net, ip6_dst_idev(skb_dst(skb)), IPSTATS_MIB_INHDRERRORS);
 	icmpv6_param_prob(skb, ICMPV6_HDR_FIELD,
 			  (&hdr->type) - skb_network_header(skb));
 	return -1;
@@ -552,11 +552,11 @@ void ipv6_exthdrs_exit(void)
  **********************************/
 
 /*
- * Note: we cannot rely on skb->dst before we assign it in ip6_route_input().
+ * Note: we cannot rely on skb_dst(skb) before we assign it in ip6_route_input().
  */
 static inline struct inet6_dev *ipv6_skb_idev(struct sk_buff *skb)
 {
-	return skb->dst ? ip6_dst_idev(skb->dst) : __in6_dev_get(skb->dev);
+	return skb_dst(skb) ? ip6_dst_idev(skb_dst(skb)) : __in6_dev_get(skb->dev);
 }
 
 /* Router Alert as of RFC 2711 */
@@ -581,7 +581,7 @@ static int ipv6_hop_jumbo(struct sk_buff *skb, int optoff)
 {
 	const unsigned char *nh = skb_network_header(skb);
 	u32 pkt_len;
-	struct net *net = dev_net(skb->dst->dev);
+	struct net *net = dev_net(skb_dst(skb)->dev);
 
 	if (nh[optoff + 1] != 4 || (optoff & 3) != 2) {
 		LIMIT_NETDEBUG(KERN_DEBUG "ipv6_hop_jumbo: wrong jumbo opt length/alignment %d\n",
diff --git a/net/ipv6/inet6_connection_sock.c b/net/ipv6/inet6_connection_sock.c
index 3c3732d..cc4797d 100644
--- a/net/ipv6/inet6_connection_sock.c
+++ b/net/ipv6/inet6_connection_sock.c
@@ -228,7 +228,7 @@ int inet6_csk_xmit(struct sk_buff *skb, int ipfragok)
 		__inet6_csk_dst_store(sk, dst, NULL, NULL);
 	}
 
-	skb->dst = dst_clone(dst);
+	skb_dst_set(skb, dst_clone(dst));
 
 	/* Restore final destination back after routing done */
 	ipv6_addr_copy(&fl.fl6_dst, &np->daddr);
diff --git a/net/ipv6/ip6_input.c b/net/ipv6/ip6_input.c
index bc1a920..c3a07d7 100644
--- a/net/ipv6/ip6_input.c
+++ b/net/ipv6/ip6_input.c
@@ -48,7 +48,7 @@
 
 inline int ip6_rcv_finish( struct sk_buff *skb)
 {
-	if (skb->dst == NULL)
+	if (skb_dst(skb) == NULL)
 		ip6_route_input(skb);
 
 	return dst_input(skb);
@@ -91,7 +91,7 @@ int ipv6_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt
 	 * arrived via the sending interface (ethX), because of the
 	 * nature of scoping architecture. --yoshfuji
 	 */
-	IP6CB(skb)->iif = skb->dst ? ip6_dst_idev(skb->dst)->dev->ifindex : dev->ifindex;
+	IP6CB(skb)->iif = skb_dst(skb) ? ip6_dst_idev(skb_dst(skb))->dev->ifindex : dev->ifindex;
 
 	if (unlikely(!pskb_may_pull(skb, sizeof(*hdr))))
 		goto err;
@@ -161,7 +161,7 @@ static int ip6_input_finish(struct sk_buff *skb)
 	int nexthdr, raw;
 	u8 hash;
 	struct inet6_dev *idev;
-	struct net *net = dev_net(skb->dst->dev);
+	struct net *net = dev_net(skb_dst(skb)->dev);
 
 	/*
 	 *	Parse extension headers
@@ -169,7 +169,7 @@ static int ip6_input_finish(struct sk_buff *skb)
 
 	rcu_read_lock();
 resubmit:
-	idev = ip6_dst_idev(skb->dst);
+	idev = ip6_dst_idev(skb_dst(skb));
 	if (!pskb_pull(skb, skb_transport_offset(skb)))
 		goto discard;
 	nhoff = IP6CB(skb)->nhoff;
@@ -242,8 +242,8 @@ int ip6_mc_input(struct sk_buff *skb)
 	struct ipv6hdr *hdr;
 	int deliver;
 
-	IP6_UPD_PO_STATS_BH(dev_net(skb->dst->dev),
-			 ip6_dst_idev(skb->dst), IPSTATS_MIB_INMCAST,
+	IP6_UPD_PO_STATS_BH(dev_net(skb_dst(skb)->dev),
+			 ip6_dst_idev(skb_dst(skb)), IPSTATS_MIB_INMCAST,
 			 skb->len);
 
 	hdr = ipv6_hdr(skb);
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 735a2bf..c8dc8e5 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -78,7 +78,7 @@ int __ip6_local_out(struct sk_buff *skb)
 		len = 0;
 	ipv6_hdr(skb)->payload_len = htons(len);
 
-	return nf_hook(PF_INET6, NF_INET_LOCAL_OUT, skb, NULL, skb->dst->dev,
+	return nf_hook(PF_INET6, NF_INET_LOCAL_OUT, skb, NULL, skb_dst(skb)->dev,
 		       dst_output);
 }
 
@@ -96,7 +96,7 @@ EXPORT_SYMBOL_GPL(ip6_local_out);
 
 static int ip6_output_finish(struct sk_buff *skb)
 {
-	struct dst_entry *dst = skb->dst;
+	struct dst_entry *dst = skb_dst(skb);
 
 	if (dst->hh)
 		return neigh_hh_output(dst->hh, skb);
@@ -117,7 +117,7 @@ static int ip6_dev_loopback_xmit(struct sk_buff *newskb)
 	__skb_pull(newskb, skb_network_offset(newskb));
 	newskb->pkt_type = PACKET_LOOPBACK;
 	newskb->ip_summed = CHECKSUM_UNNECESSARY;
-	WARN_ON(!newskb->dst);
+	WARN_ON(!skb_dst(newskb));
 
 	netif_rx(newskb);
 	return 0;
@@ -126,7 +126,7 @@ static int ip6_dev_loopback_xmit(struct sk_buff *newskb)
 
 static int ip6_output2(struct sk_buff *skb)
 {
-	struct dst_entry *dst = skb->dst;
+	struct dst_entry *dst = skb_dst(skb);
 	struct net_device *dev = dst->dev;
 
 	skb->protocol = htons(ETH_P_IPV6);
@@ -134,7 +134,7 @@ static int ip6_output2(struct sk_buff *skb)
 
 	if (ipv6_addr_is_multicast(&ipv6_hdr(skb)->daddr)) {
 		struct ipv6_pinfo* np = skb->sk ? inet6_sk(skb->sk) : NULL;
-		struct inet6_dev *idev = ip6_dst_idev(skb->dst);
+		struct inet6_dev *idev = ip6_dst_idev(skb_dst(skb));
 
 		if (!(dev->flags & IFF_LOOPBACK) && (!np || np->mc_loop) &&
 		    ((mroute6_socket(dev_net(dev)) &&
@@ -172,21 +172,21 @@ static inline int ip6_skb_dst_mtu(struct sk_buff *skb)
 	struct ipv6_pinfo *np = skb->sk ? inet6_sk(skb->sk) : NULL;
 
 	return (np && np->pmtudisc == IPV6_PMTUDISC_PROBE) ?
-	       skb->dst->dev->mtu : dst_mtu(skb->dst);
+	       skb_dst(skb)->dev->mtu : dst_mtu(skb_dst(skb));
 }
 
 int ip6_output(struct sk_buff *skb)
 {
-	struct inet6_dev *idev = ip6_dst_idev(skb->dst);
+	struct inet6_dev *idev = ip6_dst_idev(skb_dst(skb));
 	if (unlikely(idev->cnf.disable_ipv6)) {
-		IP6_INC_STATS(dev_net(skb->dst->dev), idev,
+		IP6_INC_STATS(dev_net(skb_dst(skb)->dev), idev,
 			      IPSTATS_MIB_OUTDISCARDS);
 		kfree_skb(skb);
 		return 0;
 	}
 
 	if ((skb->len > ip6_skb_dst_mtu(skb) && !skb_is_gso(skb)) ||
-				dst_allfrag(skb->dst))
+				dst_allfrag(skb_dst(skb)))
 		return ip6_fragment(skb, ip6_output2);
 	else
 		return ip6_output2(skb);
@@ -202,7 +202,7 @@ int ip6_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl,
 	struct net *net = sock_net(sk);
 	struct ipv6_pinfo *np = inet6_sk(sk);
 	struct in6_addr *first_hop = &fl->fl6_dst;
-	struct dst_entry *dst = skb->dst;
+	struct dst_entry *dst = skb_dst(skb);
 	struct ipv6hdr *hdr;
 	u8  proto = fl->proto;
 	int seg_len = skb->len;
@@ -222,7 +222,7 @@ int ip6_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl,
 		if (skb_headroom(skb) < head_room) {
 			struct sk_buff *skb2 = skb_realloc_headroom(skb, head_room);
 			if (skb2 == NULL) {
-				IP6_INC_STATS(net, ip6_dst_idev(skb->dst),
+				IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)),
 					      IPSTATS_MIB_OUTDISCARDS);
 				kfree_skb(skb);
 				return -ENOBUFS;
@@ -276,7 +276,7 @@ int ip6_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl,
 
 	mtu = dst_mtu(dst);
 	if ((skb->len <= mtu) || skb->local_df || skb_is_gso(skb)) {
-		IP6_UPD_PO_STATS(net, ip6_dst_idev(skb->dst),
+		IP6_UPD_PO_STATS(net, ip6_dst_idev(skb_dst(skb)),
 			      IPSTATS_MIB_OUT, skb->len);
 		return NF_HOOK(PF_INET6, NF_INET_LOCAL_OUT, skb, NULL, dst->dev,
 				dst_output);
@@ -286,7 +286,7 @@ int ip6_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl,
 		printk(KERN_DEBUG "IPv6: sending pkt_too_big to self\n");
 	skb->dev = dst->dev;
 	icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu, skb->dev);
-	IP6_INC_STATS(net, ip6_dst_idev(skb->dst), IPSTATS_MIB_FRAGFAILS);
+	IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)), IPSTATS_MIB_FRAGFAILS);
 	kfree_skb(skb);
 	return -EMSGSIZE;
 }
@@ -416,7 +416,7 @@ static inline int ip6_forward_finish(struct sk_buff *skb)
 
 int ip6_forward(struct sk_buff *skb)
 {
-	struct dst_entry *dst = skb->dst;
+	struct dst_entry *dst = skb_dst(skb);
 	struct ipv6hdr *hdr = ipv6_hdr(skb);
 	struct inet6_skb_parm *opt = IP6CB(skb);
 	struct net *net = dev_net(dst->dev);
@@ -485,7 +485,7 @@ int ip6_forward(struct sk_buff *skb)
 		IP6_INC_STATS(net, ip6_dst_idev(dst), IPSTATS_MIB_INDISCARDS);
 		goto drop;
 	}
-	dst = skb->dst;
+	dst = skb_dst(skb);
 
 	/* IPv6 specs say nothing about it, but it is clear that we cannot
 	   send redirects to source routed frames.
@@ -566,8 +566,8 @@ static void ip6_copy_metadata(struct sk_buff *to, struct sk_buff *from)
 	to->pkt_type = from->pkt_type;
 	to->priority = from->priority;
 	to->protocol = from->protocol;
-	dst_release(to->dst);
-	to->dst = dst_clone(from->dst);
+	skb_dst_drop(to);
+	skb_dst_set(to, dst_clone(skb_dst(from)));
 	to->dev = from->dev;
 	to->mark = from->mark;
 
@@ -624,7 +624,7 @@ int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr)
 static int ip6_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *))
 {
 	struct sk_buff *frag;
-	struct rt6_info *rt = (struct rt6_info*)skb->dst;
+	struct rt6_info *rt = (struct rt6_info*)skb_dst(skb);
 	struct ipv6_pinfo *np = skb->sk ? inet6_sk(skb->sk) : NULL;
 	struct ipv6hdr *tmp_hdr;
 	struct frag_hdr *fh;
@@ -632,7 +632,7 @@ static int ip6_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *))
 	__be32 frag_id = 0;
 	int ptr, offset = 0, err=0;
 	u8 *prevhdr, nexthdr = 0;
-	struct net *net = dev_net(skb->dst->dev);
+	struct net *net = dev_net(skb_dst(skb)->dev);
 
 	hlen = ip6_find_1stfragopt(skb, &prevhdr);
 	nexthdr = *prevhdr;
@@ -644,9 +644,9 @@ static int ip6_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *))
 	 * check should be redundant, but it's free.)
 	 */
 	if (!skb->local_df) {
-		skb->dev = skb->dst->dev;
+		skb->dev = skb_dst(skb)->dev;
 		icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu, skb->dev);
-		IP6_INC_STATS(net, ip6_dst_idev(skb->dst),
+		IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)),
 			      IPSTATS_MIB_FRAGFAILS);
 		kfree_skb(skb);
 		return -EMSGSIZE;
@@ -696,7 +696,7 @@ static int ip6_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *))
 		*prevhdr = NEXTHDR_FRAGMENT;
 		tmp_hdr = kmemdup(skb_network_header(skb), hlen, GFP_ATOMIC);
 		if (!tmp_hdr) {
-			IP6_INC_STATS(net, ip6_dst_idev(skb->dst),
+			IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)),
 				      IPSTATS_MIB_FRAGFAILS);
 			return -ENOMEM;
 		}
@@ -809,7 +809,7 @@ slow_path:
 
 		if ((frag = alloc_skb(len+hlen+sizeof(struct frag_hdr)+LL_ALLOCATED_SPACE(rt->u.dst.dev), GFP_ATOMIC)) == NULL) {
 			NETDEBUG(KERN_INFO "IPv6: frag: no memory for new fragment!\n");
-			IP6_INC_STATS(net, ip6_dst_idev(skb->dst),
+			IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)),
 				      IPSTATS_MIB_FRAGFAILS);
 			err = -ENOMEM;
 			goto fail;
@@ -873,16 +873,16 @@ slow_path:
 		if (err)
 			goto fail;
 
-		IP6_INC_STATS(net, ip6_dst_idev(skb->dst),
+		IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)),
 			      IPSTATS_MIB_FRAGCREATES);
 	}
-	IP6_INC_STATS(net, ip6_dst_idev(skb->dst),
+	IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)),
 		      IPSTATS_MIB_FRAGOKS);
 	kfree_skb(skb);
 	return err;
 
 fail:
-	IP6_INC_STATS(net, ip6_dst_idev(skb->dst),
+	IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)),
 		      IPSTATS_MIB_FRAGFAILS);
 	kfree_skb(skb);
 	return err;
@@ -1516,10 +1516,10 @@ int ip6_push_pending_frames(struct sock *sk)
 	skb->priority = sk->sk_priority;
 	skb->mark = sk->sk_mark;
 
-	skb->dst = dst_clone(&rt->u.dst);
+	skb_dst_set(skb, dst_clone(&rt->u.dst));
 	IP6_UPD_PO_STATS(net, rt->rt6i_idev, IPSTATS_MIB_OUT, skb->len);
 	if (proto == IPPROTO_ICMPV6) {
-		struct inet6_dev *idev = ip6_dst_idev(skb->dst);
+		struct inet6_dev *idev = ip6_dst_idev(skb_dst(skb));
 
 		ICMP6MSGOUT_INC_STATS_BH(net, idev, icmp6_hdr(skb)->icmp6_type);
 		ICMP6_INC_STATS_BH(net, idev, ICMP6_MIB_OUTMSGS);
@@ -1545,8 +1545,8 @@ void ip6_flush_pending_frames(struct sock *sk)
 	struct sk_buff *skb;
 
 	while ((skb = __skb_dequeue_tail(&sk->sk_write_queue)) != NULL) {
-		if (skb->dst)
-			IP6_INC_STATS(sock_net(sk), ip6_dst_idev(skb->dst),
+		if (skb_dst(skb))
+			IP6_INC_STATS(sock_net(sk), ip6_dst_idev(skb_dst(skb)),
 				      IPSTATS_MIB_OUTDISCARDS);
 		kfree_skb(skb);
 	}
diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
index af256d4..404d16a 100644
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -532,8 +532,8 @@ ip4ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
 	if (!skb2)
 		return 0;
 
-	dst_release(skb2->dst);
-	skb2->dst = NULL;
+	skb_dst_drop(skb2);
+
 	skb_pull(skb2, offset);
 	skb_reset_network_header(skb2);
 	eiph = ip_hdr(skb2);
@@ -560,21 +560,21 @@ ip4ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
 			ip_rt_put(rt);
 			goto out;
 		}
-		skb2->dst = (struct dst_entry *)rt;
+		skb_dst_set(skb2, (struct dst_entry *)rt);
 	} else {
 		ip_rt_put(rt);
 		if (ip_route_input(skb2, eiph->daddr, eiph->saddr, eiph->tos,
 				   skb2->dev) ||
-		    skb2->dst->dev->type != ARPHRD_TUNNEL)
+		    skb_dst(skb2)->dev->type != ARPHRD_TUNNEL)
 			goto out;
 	}
 
 	/* change mtu on this route */
 	if (rel_type == ICMP_DEST_UNREACH && rel_code == ICMP_FRAG_NEEDED) {
-		if (rel_info > dst_mtu(skb2->dst))
+		if (rel_info > dst_mtu(skb_dst(skb2)))
 			goto out;
 
-		skb2->dst->ops->update_pmtu(skb2->dst, rel_info);
+		skb_dst(skb2)->ops->update_pmtu(skb_dst(skb2), rel_info);
 	}
 
 	icmp_send(skb2, rel_type, rel_code, htonl(rel_info));
@@ -606,8 +606,7 @@ ip6ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
 		if (!skb2)
 			return 0;
 
-		dst_release(skb2->dst);
-		skb2->dst = NULL;
+		skb_dst_drop(skb2);
 		skb_pull(skb2, offset);
 		skb_reset_network_header(skb2);
 
@@ -720,8 +719,7 @@ static int ip6_tnl_rcv(struct sk_buff *skb, __u16 protocol,
 		skb->pkt_type = PACKET_HOST;
 		memset(skb->cb, 0, sizeof(struct inet6_skb_parm));
 		skb->dev = t->dev;
-		dst_release(skb->dst);
-		skb->dst = NULL;
+		skb_dst_drop(skb);
 		nf_reset(skb);
 
 		dscp_ecn_decapsulate(t, ipv6h, skb);
@@ -885,8 +883,8 @@ static int ip6_tnl_xmit2(struct sk_buff *skb,
 	}
 	if (mtu < IPV6_MIN_MTU)
 		mtu = IPV6_MIN_MTU;
-	if (skb->dst)
-		skb->dst->ops->update_pmtu(skb->dst, mtu);
+	if (skb_dst(skb))
+		skb_dst(skb)->ops->update_pmtu(skb_dst(skb), mtu);
 	if (skb->len > mtu) {
 		*pmtu = mtu;
 		err = -EMSGSIZE;
@@ -910,8 +908,8 @@ static int ip6_tnl_xmit2(struct sk_buff *skb,
 		kfree_skb(skb);
 		skb = new_skb;
 	}
-	dst_release(skb->dst);
-	skb->dst = dst_clone(dst);
+	skb_dst_drop(skb);
+	skb_dst_set(skb, dst_clone(dst));
 
 	skb->transport_header = skb->network_header;
 
diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
index 228be55..a35d8fc 100644
--- a/net/ipv6/ip6mr.c
+++ b/net/ipv6/ip6mr.c
@@ -398,10 +398,9 @@ static int pim6_rcv(struct sk_buff *skb)
 	skb->protocol = htons(ETH_P_IPV6);
 	skb->ip_summed = 0;
 	skb->pkt_type = PACKET_HOST;
-	dst_release(skb->dst);
+	skb_dst_drop(skb);
 	reg_dev->stats.rx_bytes += skb->len;
 	reg_dev->stats.rx_packets++;
-	skb->dst = NULL;
 	nf_reset(skb);
 	netif_rx(skb);
 	dev_put(reg_dev);
@@ -849,7 +848,7 @@ static int ip6mr_cache_report(struct net *net, struct sk_buff *pkt, mifi_t mifi,
 	ipv6_addr_copy(&msg->im6_src, &ipv6_hdr(pkt)->saddr);
 	ipv6_addr_copy(&msg->im6_dst, &ipv6_hdr(pkt)->daddr);
 
-	skb->dst = dst_clone(pkt->dst);
+	skb_dst_set(skb, dst_clone(skb_dst(pkt)));
 	skb->ip_summed = CHECKSUM_UNNECESSARY;
 	}
 
@@ -1487,7 +1486,7 @@ int ip6mr_ioctl(struct sock *sk, int cmd, void __user *arg)
 
 static inline int ip6mr_forward2_finish(struct sk_buff *skb)
 {
-	IP6_INC_STATS_BH(dev_net(skb->dst->dev), ip6_dst_idev(skb->dst),
+	IP6_INC_STATS_BH(dev_net(skb_dst(skb)->dev), ip6_dst_idev(skb_dst(skb)),
 			 IPSTATS_MIB_OUTFORWDATAGRAMS);
 	return dst_output(skb);
 }
@@ -1532,8 +1531,8 @@ static int ip6mr_forward2(struct sk_buff *skb, struct mfc6_cache *c, int vifi)
 	if (!dst)
 		goto out_free;
 
-	dst_release(skb->dst);
-	skb->dst = dst;
+	skb_dst_drop(skb);
+	skb_dst_set(skb, dst);
 
 	/*
 	 * RFC1584 teaches, that DVMRP/PIM router must deliver packets locally
@@ -1722,7 +1721,7 @@ int ip6mr_get_route(struct net *net,
 {
 	int err;
 	struct mfc6_cache *cache;
-	struct rt6_info *rt = (struct rt6_info *)skb->dst;
+	struct rt6_info *rt = (struct rt6_info *)skb_dst(skb);
 
 	read_lock(&mrt_lock);
 	cache = ip6mr_cache_find(net, &rt->rt6i_src.addr, &rt->rt6i_dst.addr);
diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c
index 4b48819..4b264ed 100644
--- a/net/ipv6/mcast.c
+++ b/net/ipv6/mcast.c
@@ -1448,6 +1448,7 @@ static void mld_sendpack(struct sk_buff *skb)
 	struct net *net = dev_net(skb->dev);
 	int err;
 	struct flowi fl;
+	struct dst_entry *dst;
 
 	IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUT, skb->len);
 
@@ -1459,9 +1460,9 @@ static void mld_sendpack(struct sk_buff *skb)
 		IPPROTO_ICMPV6, csum_partial(skb_transport_header(skb),
 					     mldlen, 0));
 
-	skb->dst = icmp6_dst_alloc(skb->dev, NULL, &ipv6_hdr(skb)->daddr);
+	dst = icmp6_dst_alloc(skb->dev, NULL, &ipv6_hdr(skb)->daddr);
 
-	if (!skb->dst) {
+	if (!dst) {
 		err = -ENOMEM;
 		goto err_out;
 	}
@@ -1470,7 +1471,8 @@ static void mld_sendpack(struct sk_buff *skb)
 			 &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
 			 skb->dev->ifindex);
 
-	err = xfrm_lookup(net, &skb->dst, &fl, NULL, 0);
+	err = xfrm_lookup(net, &dst, &fl, NULL, 0);
+	skb_dst_set(skb, dst);
 	if (err)
 		goto err_out;
 
@@ -1775,6 +1777,7 @@ static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type)
 		     IPV6_TLV_ROUTERALERT, 2, 0, 0,
 		     IPV6_TLV_PADN, 0 };
 	struct flowi fl;
+	struct dst_entry *dst;
 
 	if (type == ICMPV6_MGM_REDUCTION)
 		snd_addr = &in6addr_linklocal_allrouters;
@@ -1828,8 +1831,8 @@ static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type)
 
 	idev = in6_dev_get(skb->dev);
 
-	skb->dst = icmp6_dst_alloc(skb->dev, NULL, &ipv6_hdr(skb)->daddr);
-	if (!skb->dst) {
+	dst = icmp6_dst_alloc(skb->dev, NULL, &ipv6_hdr(skb)->daddr);
+	if (!dst) {
 		err = -ENOMEM;
 		goto err_out;
 	}
@@ -1838,11 +1841,11 @@ static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type)
 			 &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
 			 skb->dev->ifindex);
 
-	err = xfrm_lookup(net, &skb->dst, &fl, NULL, 0);
+	err = xfrm_lookup(net, &dst, &fl, NULL, 0);
 	if (err)
 		goto err_out;
 
-
+	skb_dst_set(skb, dst);
 	err = NF_HOOK(PF_INET6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev,
 		      dst_output);
 out:
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index 1d13d99..9eb68e9 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -530,7 +530,7 @@ void ndisc_send_skb(struct sk_buff *skb,
 		return;
 	}
 
-	skb->dst = dst;
+	skb_dst_set(skb, dst);
 
 	idev = in6_dev_get(dst->dev);
 	IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUT, skb->len);
@@ -1612,7 +1612,7 @@ void ndisc_send_redirect(struct sk_buff *skb, struct neighbour *neigh,
 					     len, IPPROTO_ICMPV6,
 					     csum_partial(icmph, len, 0));
 
-	buff->dst = dst;
+	skb_dst_set(buff, dst);
 	idev = in6_dev_get(dst->dev);
 	IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUT, skb->len);
 	err = NF_HOOK(PF_INET6, NF_INET_LOCAL_OUT, buff, NULL, dst->dev,
diff --git a/net/ipv6/netfilter.c b/net/ipv6/netfilter.c
index 834cea6..d5ed92b 100644
--- a/net/ipv6/netfilter.c
+++ b/net/ipv6/netfilter.c
@@ -12,7 +12,7 @@
 
 int ip6_route_me_harder(struct sk_buff *skb)
 {
-	struct net *net = dev_net(skb->dst->dev);
+	struct net *net = dev_net(skb_dst(skb)->dev);
 	struct ipv6hdr *iph = ipv6_hdr(skb);
 	struct dst_entry *dst;
 	struct flowi fl = {
@@ -28,9 +28,15 @@ int ip6_route_me_harder(struct sk_buff *skb)
 
 #ifdef CONFIG_XFRM
 	if (!(IP6CB(skb)->flags & IP6SKB_XFRM_TRANSFORMED) &&
-	    xfrm_decode_session(skb, &fl, AF_INET6) == 0)
-		if (xfrm_lookup(net, &skb->dst, &fl, skb->sk, 0))
+	    xfrm_decode_session(skb, &fl, AF_INET6) == 0) {
+		struct dst_entry *dst2 = skb_dst(skb);
+
+		if (xfrm_lookup(net, &dst2, &fl, skb->sk, 0)) {
+			skb_dst_set(skb, NULL);
 			return -1;
+		}
+		skb_dst_set(skb, dst2);
+	}
 #endif
 
 	if (dst->error) {
@@ -41,9 +47,9 @@ int ip6_route_me_harder(struct sk_buff *skb)
 	}
 
 	/* Drop old route. */
-	dst_release(skb->dst);
+	skb_dst_drop(skb);
 
-	skb->dst = dst;
+	skb_dst_set(skb, dst);
 	return 0;
 }
 EXPORT_SYMBOL(ip6_route_me_harder);
diff --git a/net/ipv6/netfilter/ip6t_REJECT.c b/net/ipv6/netfilter/ip6t_REJECT.c
index 5a2d0a4..5a7f00c 100644
--- a/net/ipv6/netfilter/ip6t_REJECT.c
+++ b/net/ipv6/netfilter/ip6t_REJECT.c
@@ -112,7 +112,7 @@ static void send_reset(struct net *net, struct sk_buff *oldskb)
 		return;
 	}
 
-	nskb->dst = dst;
+	skb_dst_set(nskb, dst);
 
 	skb_reserve(nskb, hh_len + dst->header_len);
 
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index e99307f..36a090d 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -625,7 +625,7 @@ static int rawv6_send_hdrinc(struct sock *sk, void *from, int length,
 
 	skb->priority = sk->sk_priority;
 	skb->mark = sk->sk_mark;
-	skb->dst = dst_clone(&rt->u.dst);
+	skb_dst_set(skb, dst_clone(&rt->u.dst));
 
 	skb_put(skb, length);
 	skb_reset_network_header(skb);
diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c
index e9ac7a1..54a387d 100644
--- a/net/ipv6/reassembly.c
+++ b/net/ipv6/reassembly.c
@@ -267,7 +267,7 @@ static int ip6_frag_queue(struct frag_queue *fq, struct sk_buff *skb,
 	struct sk_buff *prev, *next;
 	struct net_device *dev;
 	int offset, end;
-	struct net *net = dev_net(skb->dst->dev);
+	struct net *net = dev_net(skb_dst(skb)->dev);
 
 	if (fq->q.last_in & INET_FRAG_COMPLETE)
 		goto err;
@@ -277,7 +277,7 @@ static int ip6_frag_queue(struct frag_queue *fq, struct sk_buff *skb,
 			((u8 *)(fhdr + 1) - (u8 *)(ipv6_hdr(skb) + 1)));
 
 	if ((unsigned int)end > IPV6_MAXPLEN) {
-		IP6_INC_STATS_BH(net, ip6_dst_idev(skb->dst),
+		IP6_INC_STATS_BH(net, ip6_dst_idev(skb_dst(skb)),
 				 IPSTATS_MIB_INHDRERRORS);
 		icmpv6_param_prob(skb, ICMPV6_HDR_FIELD,
 				  ((u8 *)&fhdr->frag_off -
@@ -310,7 +310,7 @@ static int ip6_frag_queue(struct frag_queue *fq, struct sk_buff *skb,
 			/* RFC2460 says always send parameter problem in
 			 * this case. -DaveM
 			 */
-			IP6_INC_STATS_BH(net, ip6_dst_idev(skb->dst),
+			IP6_INC_STATS_BH(net, ip6_dst_idev(skb_dst(skb)),
 					 IPSTATS_MIB_INHDRERRORS);
 			icmpv6_param_prob(skb, ICMPV6_HDR_FIELD,
 					  offsetof(struct ipv6hdr, payload_len));
@@ -434,7 +434,7 @@ static int ip6_frag_queue(struct frag_queue *fq, struct sk_buff *skb,
 	return -1;
 
 err:
-	IP6_INC_STATS(net, ip6_dst_idev(skb->dst),
+	IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)),
 		      IPSTATS_MIB_REASMFAILS);
 	kfree_skb(skb);
 	return -1;
@@ -576,9 +576,9 @@ static int ipv6_frag_rcv(struct sk_buff *skb)
 	struct frag_hdr *fhdr;
 	struct frag_queue *fq;
 	struct ipv6hdr *hdr = ipv6_hdr(skb);
-	struct net *net = dev_net(skb->dst->dev);
+	struct net *net = dev_net(skb_dst(skb)->dev);
 
-	IP6_INC_STATS_BH(net, ip6_dst_idev(skb->dst), IPSTATS_MIB_REASMREQDS);
+	IP6_INC_STATS_BH(net, ip6_dst_idev(skb_dst(skb)), IPSTATS_MIB_REASMREQDS);
 
 	/* Jumbo payload inhibits frag. header */
 	if (hdr->payload_len==0)
@@ -595,17 +595,17 @@ static int ipv6_frag_rcv(struct sk_buff *skb)
 		/* It is not a fragmented frame */
 		skb->transport_header += sizeof(struct frag_hdr);
 		IP6_INC_STATS_BH(net,
-				 ip6_dst_idev(skb->dst), IPSTATS_MIB_REASMOKS);
+				 ip6_dst_idev(skb_dst(skb)), IPSTATS_MIB_REASMOKS);
 
 		IP6CB(skb)->nhoff = (u8 *)fhdr - skb_network_header(skb);
 		return 1;
 	}
 
 	if (atomic_read(&net->ipv6.frags.mem) > net->ipv6.frags.high_thresh)
-		ip6_evictor(net, ip6_dst_idev(skb->dst));
+		ip6_evictor(net, ip6_dst_idev(skb_dst(skb)));
 
 	if ((fq = fq_find(net, fhdr->identification, &hdr->saddr, &hdr->daddr,
-			  ip6_dst_idev(skb->dst))) != NULL) {
+			  ip6_dst_idev(skb_dst(skb)))) != NULL) {
 		int ret;
 
 		spin_lock(&fq->q.lock);
@@ -617,12 +617,12 @@ static int ipv6_frag_rcv(struct sk_buff *skb)
 		return ret;
 	}
 
-	IP6_INC_STATS_BH(net, ip6_dst_idev(skb->dst), IPSTATS_MIB_REASMFAILS);
+	IP6_INC_STATS_BH(net, ip6_dst_idev(skb_dst(skb)), IPSTATS_MIB_REASMFAILS);
 	kfree_skb(skb);
 	return -1;
 
 fail_hdr:
-	IP6_INC_STATS(net, ip6_dst_idev(skb->dst), IPSTATS_MIB_INHDRERRORS);
+	IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)), IPSTATS_MIB_INHDRERRORS);
 	icmpv6_param_prob(skb, ICMPV6_HDR_FIELD, skb_network_header_len(skb));
 	return -1;
 }
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 032a5ec..658293e 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -800,7 +800,7 @@ void ip6_route_input(struct sk_buff *skb)
 	if (rt6_need_strict(&iph->daddr) && skb->dev->type != ARPHRD_PIMREG)
 		flags |= RT6_LOOKUP_F_IFACE;
 
-	skb->dst = fib6_rule_lookup(net, &fl, flags, ip6_pol_route_input);
+	skb_dst_set(skb, fib6_rule_lookup(net, &fl, flags, ip6_pol_route_input));
 }
 
 static struct rt6_info *ip6_pol_route_output(struct net *net, struct fib6_table *table,
@@ -911,7 +911,7 @@ static void ip6_link_failure(struct sk_buff *skb)
 
 	icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_ADDR_UNREACH, 0, skb->dev);
 
-	rt = (struct rt6_info *) skb->dst;
+	rt = (struct rt6_info *) skb_dst(skb);
 	if (rt) {
 		if (rt->rt6i_flags&RTF_CACHE) {
 			dst_set_expires(&rt->u.dst, 0);
@@ -1868,7 +1868,7 @@ int ipv6_route_ioctl(struct net *net, unsigned int cmd, void __user *arg)
 static int ip6_pkt_drop(struct sk_buff *skb, int code, int ipstats_mib_noroutes)
 {
 	int type;
-	struct dst_entry *dst = skb->dst;
+	struct dst_entry *dst = skb_dst(skb);
 	switch (ipstats_mib_noroutes) {
 	case IPSTATS_MIB_INNOROUTES:
 		type = ipv6_addr_type(&ipv6_hdr(skb)->daddr);
@@ -1895,7 +1895,7 @@ static int ip6_pkt_discard(struct sk_buff *skb)
 
 static int ip6_pkt_discard_out(struct sk_buff *skb)
 {
-	skb->dev = skb->dst->dev;
+	skb->dev = skb_dst(skb)->dev;
 	return ip6_pkt_drop(skb, ICMPV6_NOROUTE, IPSTATS_MIB_OUTNOROUTES);
 }
 
@@ -1908,7 +1908,7 @@ static int ip6_pkt_prohibit(struct sk_buff *skb)
 
 static int ip6_pkt_prohibit_out(struct sk_buff *skb)
 {
-	skb->dev = skb->dst->dev;
+	skb->dev = skb_dst(skb)->dev;
 	return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_OUTNOROUTES);
 }
 
@@ -2366,7 +2366,7 @@ static int inet6_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void
 	skb_reserve(skb, MAX_HEADER + sizeof(struct ipv6hdr));
 
 	rt = (struct rt6_info*) ip6_route_output(net, NULL, &fl);
-	skb->dst = &rt->u.dst;
+	skb_dst_set(skb, &rt->u.dst);
 
 	err = rt6_fill_node(net, skb, rt, &fl.fl6_dst, &fl.fl6_src, iif,
 			    RTM_NEWROUTE, NETLINK_CB(in_skb).pid,
diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index b3a59bd..68e5230 100644
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -575,8 +575,7 @@ static int ipip6_rcv(struct sk_buff *skb)
 		tunnel->dev->stats.rx_packets++;
 		tunnel->dev->stats.rx_bytes += skb->len;
 		skb->dev = tunnel->dev;
-		dst_release(skb->dst);
-		skb->dst = NULL;
+		skb_dst_drop(skb);
 		nf_reset(skb);
 		ipip6_ecn_decapsulate(iph, skb);
 		netif_rx(skb);
@@ -638,8 +637,8 @@ static int ipip6_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
 	if (dev->priv_flags & IFF_ISATAP) {
 		struct neighbour *neigh = NULL;
 
-		if (skb->dst)
-			neigh = skb->dst->neighbour;
+		if (skb_dst(skb))
+			neigh = skb_dst(skb)->neighbour;
 
 		if (neigh == NULL) {
 			if (net_ratelimit())
@@ -663,8 +662,8 @@ static int ipip6_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
 	if (!dst) {
 		struct neighbour *neigh = NULL;
 
-		if (skb->dst)
-			neigh = skb->dst->neighbour;
+		if (skb_dst(skb))
+			neigh = skb_dst(skb)->neighbour;
 
 		if (neigh == NULL) {
 			if (net_ratelimit())
@@ -714,7 +713,7 @@ static int ipip6_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
 	if (tiph->frag_off)
 		mtu = dst_mtu(&rt->u.dst) - sizeof(struct iphdr);
 	else
-		mtu = skb->dst ? dst_mtu(skb->dst) : dev->mtu;
+		mtu = skb_dst(skb) ? dst_mtu(skb_dst(skb)) : dev->mtu;
 
 	if (mtu < 68) {
 		stats->collisions++;
@@ -723,8 +722,8 @@ static int ipip6_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
 	}
 	if (mtu < IPV6_MIN_MTU)
 		mtu = IPV6_MIN_MTU;
-	if (tunnel->parms.iph.daddr && skb->dst)
-		skb->dst->ops->update_pmtu(skb->dst, mtu);
+	if (tunnel->parms.iph.daddr && skb_dst(skb))
+		skb_dst(skb)->ops->update_pmtu(skb_dst(skb), mtu);
 
 	if (skb->len > mtu) {
 		icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu, dev);
@@ -768,8 +767,8 @@ static int ipip6_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
 	skb_reset_network_header(skb);
 	memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
 	IPCB(skb)->flags = 0;
-	dst_release(skb->dst);
-	skb->dst = &rt->u.dst;
+	skb_dst_drop(skb);
+	skb_dst_set(skb, &rt->u.dst);
 
 	/*
 	 *	Push down and install the IPIP header.
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index ea37741..53b6a41 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -981,9 +981,10 @@ static void tcp_v6_send_response(struct sk_buff *skb, u32 seq, u32 ack, u32 win,
 	struct tcphdr *th = tcp_hdr(skb), *t1;
 	struct sk_buff *buff;
 	struct flowi fl;
-	struct net *net = dev_net(skb->dst->dev);
+	struct net *net = dev_net(skb_dst(skb)->dev);
 	struct sock *ctl_sk = net->ipv6.tcp_sk;
 	unsigned int tot_len = sizeof(struct tcphdr);
+	struct dst_entry *dst;
 	__be32 *topt;
 
 	if (ts)
@@ -1052,8 +1053,9 @@ static void tcp_v6_send_response(struct sk_buff *skb, u32 seq, u32 ack, u32 win,
 	 * Underlying function will use this to retrieve the network
 	 * namespace
 	 */
-	if (!ip6_dst_lookup(ctl_sk, &buff->dst, &fl)) {
-		if (xfrm_lookup(net, &buff->dst, &fl, NULL, 0) >= 0) {
+	if (!ip6_dst_lookup(ctl_sk, &dst, &fl)) {
+		if (xfrm_lookup(net, &dst, &fl, NULL, 0) >= 0) {
+			skb_dst_set(buff, dst);
 			ip6_xmit(ctl_sk, buff, &fl, NULL, 0);
 			TCP_INC_STATS_BH(net, TCP_MIB_OUTSEGS);
 			if (rst)
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 8905712..fc333d8 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -177,10 +177,9 @@ static struct sock *__udp6_lib_lookup_skb(struct sk_buff *skb,
 
 	if (unlikely(sk = skb_steal_sock(skb)))
 		return sk;
-	else
-		return __udp6_lib_lookup(dev_net(skb->dst->dev), &iph->saddr, sport,
-					 &iph->daddr, dport, inet6_iif(skb),
-					 udptable);
+	return __udp6_lib_lookup(dev_net(skb_dst(skb)->dev), &iph->saddr, sport,
+				 &iph->daddr, dport, inet6_iif(skb),
+				 udptable);
 }
 
 /*
diff --git a/net/ipv6/xfrm6_mode_tunnel.c b/net/ipv6/xfrm6_mode_tunnel.c
index e20529b..3927832 100644
--- a/net/ipv6/xfrm6_mode_tunnel.c
+++ b/net/ipv6/xfrm6_mode_tunnel.c
@@ -31,7 +31,7 @@ static inline void ipip6_ecn_decapsulate(struct sk_buff *skb)
  */
 static int xfrm6_mode_tunnel_output(struct xfrm_state *x, struct sk_buff *skb)
 {
-	struct dst_entry *dst = skb->dst;
+	struct dst_entry *dst = skb_dst(skb);
 	struct ipv6hdr *top_iph;
 	int dsfield;
 
@@ -45,7 +45,7 @@ static int xfrm6_mode_tunnel_output(struct xfrm_state *x, struct sk_buff *skb)
 
 	memcpy(top_iph->flow_lbl, XFRM_MODE_SKB_CB(skb)->flow_lbl,
 	       sizeof(top_iph->flow_lbl));
-	top_iph->nexthdr = xfrm_af2proto(skb->dst->ops->family);
+	top_iph->nexthdr = xfrm_af2proto(skb_dst(skb)->ops->family);
 
 	dsfield = XFRM_MODE_SKB_CB(skb)->tos;
 	dsfield = INET_ECN_encapsulate(dsfield, dsfield);
diff --git a/net/ipv6/xfrm6_output.c b/net/ipv6/xfrm6_output.c
index 5ee5a03..c4f4eef 100644
--- a/net/ipv6/xfrm6_output.c
+++ b/net/ipv6/xfrm6_output.c
@@ -30,7 +30,7 @@ EXPORT_SYMBOL(xfrm6_find_1stfragopt);
 static int xfrm6_tunnel_check_size(struct sk_buff *skb)
 {
 	int mtu, ret = 0;
-	struct dst_entry *dst = skb->dst;
+	struct dst_entry *dst = skb_dst(skb);
 
 	mtu = dst_mtu(dst);
 	if (mtu < IPV6_MIN_MTU)
@@ -90,6 +90,6 @@ static int xfrm6_output_finish(struct sk_buff *skb)
 
 int xfrm6_output(struct sk_buff *skb)
 {
-	return NF_HOOK(PF_INET6, NF_INET_POST_ROUTING, skb, NULL, skb->dst->dev,
+	return NF_HOOK(PF_INET6, NF_INET_POST_ROUTING, skb, NULL, skb_dst(skb)->dev,
 		       xfrm6_output_finish);
 }