net: add infrastructure to un-offload UDP tunnel port
This adds a new NETDEV_UDP_TUNNEL_DROP_INFO event, similar to
NETDEV_UDP_TUNNEL_PUSH_INFO, to signal to un-offload ports.
This also adds udp_tunnel_drop_rx_port(), which calls
ndo_udp_tunnel_del.
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/udp_tunnel.c b/net/ipv4/udp_tunnel.c
index 0d3f14c..6539ff1 100644
--- a/net/ipv4/udp_tunnel.c
+++ b/net/ipv4/udp_tunnel.c
@@ -94,6 +94,24 @@
}
EXPORT_SYMBOL_GPL(udp_tunnel_push_rx_port);
+void udp_tunnel_drop_rx_port(struct net_device *dev, struct socket *sock,
+ unsigned short type)
+{
+ struct sock *sk = sock->sk;
+ struct udp_tunnel_info ti;
+
+ if (!dev->netdev_ops->ndo_udp_tunnel_del ||
+ !(dev->features & NETIF_F_RX_UDP_TUNNEL_PORT))
+ return;
+
+ ti.type = type;
+ ti.sa_family = sk->sk_family;
+ ti.port = inet_sk(sk)->inet_sport;
+
+ dev->netdev_ops->ndo_udp_tunnel_del(dev, &ti);
+}
+EXPORT_SYMBOL_GPL(udp_tunnel_drop_rx_port);
+
/* Notify netdevs that UDP port started listening */
void udp_tunnel_notify_add_rx_port(struct socket *sock, unsigned short type)
{