vxlan: support ndo_fill_metadata_dst also for IPv6
authorJiri Benc <jbenc@redhat.com>
Mon, 7 Dec 2015 12:04:31 +0000 (13:04 +0100)
committerDavid S. Miller <davem@davemloft.net>
Mon, 7 Dec 2015 21:31:25 +0000 (16:31 -0500)
Fill the metadata correctly even when tunneling over IPv6. Also, check that
the provided metadata is of an address family that is supported by the
tunnel.

Signed-off-by: Jiri Benc <jbenc@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/vxlan.c

index 5a38558da15761f20e3502f4ce165d38e348542a..14cfa4cdf903de27c4b1b1ba5873877468ff1632 100644 (file)
@@ -2419,9 +2419,30 @@ static int vxlan_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb)
                                  vxlan->cfg.port_max, true);
        dport = info->key.tp_dst ? : vxlan->cfg.dst_port;
 
-       if (ip_tunnel_info_af(info) == AF_INET)
+       if (ip_tunnel_info_af(info) == AF_INET) {
+               if (!vxlan->vn4_sock)
+                       return -EINVAL;
                return egress_ipv4_tun_info(dev, skb, info, sport, dport);
-       return -EINVAL;
+       } else {
+#if IS_ENABLED(CONFIG_IPV6)
+               struct dst_entry *ndst;
+
+               if (!vxlan->vn6_sock)
+                       return -EINVAL;
+               ndst = vxlan6_get_route(vxlan, skb, 0,
+                                       &info->key.u.ipv6.dst,
+                                       &info->key.u.ipv6.src);
+               if (IS_ERR(ndst))
+                       return PTR_ERR(ndst);
+               dst_release(ndst);
+
+               info->key.tp_src = sport;
+               info->key.tp_dst = dport;
+#else /* !CONFIG_IPV6 */
+               return -EPFNOSUPPORT;
+#endif
+       }
+       return 0;
 }
 
 static const struct net_device_ops vxlan_netdev_ops = {