vxlan: fdb: allow specifying multiple destinations for zero MAC

The zero MAC entry in the fdb is used as default destination. With
multiple default destinations it is possible to use vxlan in
environments that disable multicast on the infrastructure level, e.g.
public clouds.

Signed-off-by: Mike Rapoport <mike.rapoport@ravellosystems.com>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>

diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index c1825201f9e278ad3f862e55c3b4e17535437164..3e75f9726c33fd9a0f3057664bebffafdf3fce46 100644 (file)
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -458,7 +458,8 @@ static int vxlan_fdb_create(struct vxlan_dev *vxlan,
                        notify = 1;
                }
                if ((flags & NLM_F_APPEND) &&
-                   is_multicast_ether_addr(f->eth_addr)) {
+                   (is_multicast_ether_addr(f->eth_addr) ||
+                    is_zero_ether_addr(f->eth_addr))) {
                        int rc = vxlan_fdb_append(f, ip, port, vni, ifindex);
 
                        if (rc < 0)