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Commit eb857186 authored by David S. Miller's avatar David S. Miller
Browse files

ipv6: ndisc: Convert to dst_neigh_lookup() 



Now all code paths grab a local reference to the neigh, so if neigh
is not NULL we unconditionally release it at the end.  The old logic
would only release if we didn't have a non-NULL 'rt'.

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 0ec88662

net/ipv6/ndisc.c

+12 −6
Original line number Diff line number Diff line
@@ -1223,11 +1223,17 @@ static void ndisc_router_discovery(struct sk_buff *skb) 


	rt = rt6_get_dflt_router(&ipv6_hdr(skb)->saddr, skb->dev);



	if (rt)

		neigh = dst_get_neighbour_noref(&rt->dst);



	if (rt) {

		neigh = dst_neigh_lookup(&rt->dst, &ipv6_hdr(skb)->saddr);

		if (!neigh) {

			ND_PRINTK0(KERN_ERR

				   "ICMPv6 RA: %s() got default router without neighbour.\n",

				   __func__);

			dst_release(&rt->dst);

			return;

		}

	}

	if (rt && lifetime == 0) {

		neigh_clone(neigh);

		ip6_del_rt(rt);

		rt = NULL;

	}
@@ -1244,7 +1250,7 @@ static void ndisc_router_discovery(struct sk_buff *skb) 
			return;

		}



		neigh = dst_get_neighbour_noref(&rt->dst);

		neigh = dst_neigh_lookup(&rt->dst, &ipv6_hdr(skb)->saddr);

		if (neigh == NULL) {

			ND_PRINTK0(KERN_ERR

				   "ICMPv6 RA: %s() got default router without neighbour.\n",
@@ -1411,7 +1417,7 @@ static void ndisc_router_discovery(struct sk_buff *skb) 
out:

	if (rt)

		dst_release(&rt->dst);

	else if (neigh)

	if (neigh)

		neigh_release(neigh);

}