vxlan: support for ndo_fdb_get

This patch implements ndo_fdb_get for a vxlan device.

Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Reviewed-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index 49d4b5854c62e0684572c36f7cf1d33e489d50c4..71c3b7b6b1abcda672eda8dbc4e71495bc6b1fe1 100644 (file)
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -1152,6 +1152,39 @@ out:
        return err;
 }
 
+static int vxlan_fdb_get(struct sk_buff *skb,
+                        struct nlattr *tb[],
+                        struct net_device *dev,
+                        const unsigned char *addr,
+                        u16 vid, u32 portid, u32 seq,
+                        struct netlink_ext_ack *extack)
+{
+       struct vxlan_dev *vxlan = netdev_priv(dev);
+       struct vxlan_fdb *f;
+       __be32 vni;
+       int err;
+
+       if (tb[NDA_VNI])
+               vni = cpu_to_be32(nla_get_u32(tb[NDA_VNI]));
+       else
+               vni = vxlan->default_dst.remote_vni;
+
+       rcu_read_lock();
+
+       f = __vxlan_find_mac(vxlan, addr, vni);
+       if (!f) {
+               NL_SET_ERR_MSG(extack, "Fdb entry not found");
+               err = -ENOENT;
+               goto errout;
+       }
+
+       err = vxlan_fdb_info(skb, vxlan, f, portid, seq,
+                            RTM_NEWNEIGH, 0, first_remote_rcu(f));
+errout:
+       rcu_read_unlock();
+       return err;
+}
+
 /* Watch incoming packets to learn mapping between Ethernet address
  * and Tunnel endpoint.
  * Return true if packet is bogus and should be dropped.
@@ -2805,6 +2838,7 @@ static const struct net_device_ops vxlan_netdev_ether_ops = {
        .ndo_fdb_add            = vxlan_fdb_add,
        .ndo_fdb_del            = vxlan_fdb_delete,
        .ndo_fdb_dump           = vxlan_fdb_dump,
+       .ndo_fdb_get            = vxlan_fdb_get,
        .ndo_fill_metadata_dst  = vxlan_fill_metadata_dst,
 };