ipv4: Handle ipv6 gateway in fib_good_nh

Update fib_good_nh to handle an ipv6 gateway.

Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
index e5a6d431bfab03ef66749b2040c4c9d67ac68b48..c1ea138335a26d8a30fd4fba1daeae86b89f6564 100644 (file)
--- a/net/ipv4/fib_semantics.c
+++ b/net/ipv4/fib_semantics.c
@@ -1909,8 +1909,14 @@ static bool fib_good_nh(const struct fib_nh *nh)
 
                rcu_read_lock_bh();
 
-               n = __ipv4_neigh_lookup_noref(nh->fib_nh_dev,
-                                             (__force u32)nh->fib_nh_gw4);
+               if (likely(nh->fib_nh_gw_family == AF_INET))
+                       n = __ipv4_neigh_lookup_noref(nh->fib_nh_dev,
+                                                  (__force u32)nh->fib_nh_gw4);
+               else if (nh->fib_nh_gw_family == AF_INET6)
+                       n = __ipv6_neigh_lookup_noref_stub(nh->fib_nh_dev,
+                                                          &nh->fib_nh_gw6);
+               else
+                       n = NULL;
                if (n)
                        state = n->nud_state;