ipv6: do not create neighbor entries for local delivery

They will be created at output, if ever needed. This avoids creating
empty neighbor entries when TPROXYing/Forwarding packets for addresses
that are not even directly reachable.

Note that IPv4 already handles it this way. No neighbor entries are
created for local input.

Tested by myself and customer.

Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: Marcelo Ricardo Leitner <mleitner@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index e229a3bc345dc4138a188282c4ab4f1717882832..363d8b7772e8d23f180a8db6c0ae707225ad8a63 100644 (file)
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -928,7 +928,7 @@ restart:
        dst_hold(&rt->dst);
        read_unlock_bh(&table->tb6_lock);
 
-       if (!rt->n && !(rt->rt6i_flags & RTF_NONEXTHOP))
+       if (!rt->n && !(rt->rt6i_flags & (RTF_NONEXTHOP | RTF_LOCAL)))
                nrt = rt6_alloc_cow(rt, &fl6->daddr, &fl6->saddr);
        else if (!(rt->dst.flags & DST_HOST))
                nrt = rt6_alloc_clone(rt, &fl6->daddr);