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>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index c1825201f9e2..3e75f9726c33 100644
--- 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)