1 files changed, 21 insertions, 16 deletions

diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 84d0bd5cac93..d97e07183ce9 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -136,7 +136,7 @@ static int ip6_finish_output2(struct sk_buff *skb)
 	}
 
 	rcu_read_lock();
-	neigh = dst_get_neighbour(dst);
+	neigh = dst_get_neighbour_noref(dst);
 	if (neigh) {
 		int res = neigh_output(neigh, skb);
 
@@ -238,8 +238,8 @@ int ip6_xmit(struct sock *sk, struct sk_buff *skb, struct flowi6 *fl6,
 	hdr->nexthdr = proto;
 	hdr->hop_limit = hlimit;
 
-	ipv6_addr_copy(&hdr->saddr, &fl6->saddr);
-	ipv6_addr_copy(&hdr->daddr, first_hop);
+	hdr->saddr = fl6->saddr;
+	hdr->daddr = *first_hop;
 
 	skb->priority = sk->sk_priority;
 	skb->mark = sk->sk_mark;
@@ -290,8 +290,8 @@ int ip6_nd_hdr(struct sock *sk, struct sk_buff *skb, struct net_device *dev,
 	hdr->nexthdr = proto;
 	hdr->hop_limit = np->hop_limit;
 
-	ipv6_addr_copy(&hdr->saddr, saddr);
-	ipv6_addr_copy(&hdr->daddr, daddr);
+	hdr->saddr = *saddr;
+	hdr->daddr = *daddr;
 
 	return 0;
 }
@@ -329,10 +329,11 @@ static int ip6_forward_proxy_check(struct sk_buff *skb)
 {
 	struct ipv6hdr *hdr = ipv6_hdr(skb);
 	u8 nexthdr = hdr->nexthdr;
+	__be16 frag_off;
 	int offset;
 
 	if (ipv6_ext_hdr(nexthdr)) {
-		offset = ipv6_skip_exthdr(skb, sizeof(*hdr), &nexthdr);
+		offset = ipv6_skip_exthdr(skb, sizeof(*hdr), &nexthdr, &frag_off);
 		if (offset < 0)
 			return 0;
 	} else
@@ -462,7 +463,7 @@ int ip6_forward(struct sk_buff *skb)
 	   send redirects to source routed frames.
 	   We don't send redirects to frames decapsulated from IPsec.
 	 */
-	n = dst_get_neighbour(dst);
+	n = dst_get_neighbour_noref(dst);
 	if (skb->dev == dst->dev && n && opt->srcrt == 0 && !skb_sec_path(skb)) {
 		struct in6_addr *target = NULL;
 		struct rt6_info *rt;
@@ -603,7 +604,7 @@ void ipv6_select_ident(struct frag_hdr *fhdr, struct rt6_info *rt)
 	static atomic_t ipv6_fragmentation_id;
 	int old, new;
 
-	if (rt) {
+	if (rt && !(rt->dst.flags & DST_NOPEER)) {
 		struct inet_peer *peer;
 
 		if (!rt->rt6i_peer)
@@ -631,6 +632,7 @@ int ip6_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *))
 	struct ipv6hdr *tmp_hdr;
 	struct frag_hdr *fh;
 	unsigned int mtu, hlen, left, len;
+	int hroom, troom;
 	__be32 frag_id = 0;
 	int ptr, offset = 0, err=0;
 	u8 *prevhdr, nexthdr = 0;
@@ -797,6 +799,8 @@ slow_path:
 	 */
 
 	*prevhdr = NEXTHDR_FRAGMENT;
+	hroom = LL_RESERVED_SPACE(rt->dst.dev);
+	troom = rt->dst.dev->needed_tailroom;
 
 	/*
 	 *	Keep copying data until we run out.
@@ -815,7 +819,8 @@ slow_path:
 		 *	Allocate buffer.
 		 */
 
-		if ((frag = alloc_skb(len+hlen+sizeof(struct frag_hdr)+LL_ALLOCATED_SPACE(rt->dst.dev), GFP_ATOMIC)) == NULL) {
+		if ((frag = alloc_skb(len + hlen + sizeof(struct frag_hdr) +
+				      hroom + troom, GFP_ATOMIC)) == NULL) {
 			NETDEBUG(KERN_INFO "IPv6: frag: no memory for new fragment!\n");
 			IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)),
 				      IPSTATS_MIB_FRAGFAILS);
@@ -828,7 +833,7 @@ slow_path:
 		 */
 
 		ip6_copy_metadata(frag, skb);
-		skb_reserve(frag, LL_RESERVED_SPACE(rt->dst.dev));
+		skb_reserve(frag, hroom);
 		skb_put(frag, len + hlen + sizeof(struct frag_hdr));
 		skb_reset_network_header(frag);
 		fh = (struct frag_hdr *)(skb_network_header(frag) + hlen);
@@ -978,7 +983,7 @@ static int ip6_dst_lookup_tail(struct sock *sk,
 	 * dst entry of the nexthop router
 	 */
 	rcu_read_lock();
-	n = dst_get_neighbour(*dst);
+	n = dst_get_neighbour_noref(*dst);
 	if (n && !(n->nud_state & NUD_VALID)) {
 		struct inet6_ifaddr *ifp;
 		struct flowi6 fl_gw6;
@@ -1059,7 +1064,7 @@ struct dst_entry *ip6_dst_lookup_flow(struct sock *sk, struct flowi6 *fl6,
 	if (err)
 		return ERR_PTR(err);
 	if (final_dst)
-		ipv6_addr_copy(&fl6->daddr, final_dst);
+		fl6->daddr = *final_dst;
 	if (can_sleep)
 		fl6->flowi6_flags |= FLOWI_FLAG_CAN_SLEEP;
 
@@ -1095,7 +1100,7 @@ struct dst_entry *ip6_sk_dst_lookup_flow(struct sock *sk, struct flowi6 *fl6,
 	if (err)
 		return ERR_PTR(err);
 	if (final_dst)
-		ipv6_addr_copy(&fl6->daddr, final_dst);
+		fl6->daddr = *final_dst;
 	if (can_sleep)
 		fl6->flowi6_flags |= FLOWI_FLAG_CAN_SLEEP;
 
@@ -1588,7 +1593,7 @@ int ip6_push_pending_frames(struct sock *sk)
 	if (np->pmtudisc < IPV6_PMTUDISC_DO)
 		skb->local_df = 1;
 
-	ipv6_addr_copy(final_dst, &fl6->daddr);
+	*final_dst = fl6->daddr;
 	__skb_pull(skb, skb_network_header_len(skb));
 	if (opt && opt->opt_flen)
 		ipv6_push_frag_opts(skb, opt, &proto);
@@ -1604,8 +1609,8 @@ int ip6_push_pending_frames(struct sock *sk)
 
 	hdr->hop_limit = np->cork.hop_limit;
 	hdr->nexthdr = proto;
-	ipv6_addr_copy(&hdr->saddr, &fl6->saddr);
-	ipv6_addr_copy(&hdr->daddr, final_dst);
+	hdr->saddr = fl6->saddr;
+	hdr->daddr = *final_dst;
 
 	skb->priority = sk->sk_priority;
 	skb->mark = sk->sk_mark;