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blackhole_netdev: use blackhole_netdev to invalidate dst entries

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

Signed-off-by: Mahesh Bandewar <maheshb@google.com>
Tested-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Mahesh Bandewar
2019-07-01 14:38:57 -07:00
committed by David S. Miller
parent 4de83b88c6
commit 8d7017fd62
3 changed files with 3 additions and 4 deletions
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3
net/ipv4/route.c
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@@ -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);
}