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Commit 8d7017fd authored by Mahesh Bandewar's avatar Mahesh Bandewar Committed by David S. Miller
Browse files

blackhole_netdev: use blackhole_netdev to invalidate dst entries 



Use blackhole_netdev instead of 'lo' device with lower MTU when marking
dst "dead".

Signed-off-by: default avatarMahesh Bandewar <maheshb@google.com>
Tested-by: default avatarMichael Chan <michael.chan@broadcom.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 4de83b88

net/core/dst.c

+1 −1
Original line number Diff line number Diff line
@@ -160,7 +160,7 @@ void dst_dev_put(struct dst_entry *dst) 
		dst->ops->ifdown(dst, dev, true);

	dst->input = dst_discard;

	dst->output = dst_discard_out;

	dst->dev = dev_net(dst->dev)->loopback_dev;

	dst->dev = blackhole_netdev;

	dev_hold(dst->dev);

	dev_put(dev);

}

net/ipv4/route.c

+1 −2
Original line number Diff line number Diff line
@@ -1532,7 +1532,6 @@ static void ipv4_dst_destroy(struct dst_entry *dst) 


void rt_flush_dev(struct net_device *dev)

{

	struct net *net = dev_net(dev);

	struct rtable *rt;

	int cpu;
@@ -1543,7 +1542,7 @@ void rt_flush_dev(struct net_device *dev) 
		list_for_each_entry(rt, &ul->head, rt_uncached) {

			if (rt->dst.dev != dev)

				continue;

			rt->dst.dev = net->loopback_dev;

			rt->dst.dev = blackhole_netdev;

			dev_hold(rt->dst.dev);

			dev_put(dev);

		}

net/ipv6/route.c

+1 −1
Original line number Diff line number Diff line
@@ -176,7 +176,7 @@ static void rt6_uncached_list_flush_dev(struct net *net, struct net_device *dev) 
			}



			if (rt_dev == dev) {

				rt->dst.dev = loopback_dev;

				rt->dst.dev = blackhole_netdev;

				dev_hold(rt->dst.dev);

				dev_put(rt_dev);

			}