vxlan: Add new UDP encapsulation offload type for VXLAN-GPE (b9adcd69) · Commits · 戴 / test

The fact is VXLAN with Generic Protocol Extensions cannot be supported by the same hardware parsers that support VXLAN. The protocol extensions allow for things like a Next Protocol field which in turn allows for things other than Ethernet to be passed over the tunnel. Most existing parsers will not know how to interpret this. To resolve this I am giving VXLAN-GPE its own UDP encapsulation offload type. This way hardware that does support GPE can simply add this type to the switch statement for VXLAN, and if they don't support it then this will fix any issues where headers might be interpreted incorrectly. Signed-off-by:

Alexander Duyck <aduyck@mirantis.com> Acked-by:

Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by:

David S. Miller <davem@davemloft.net>

drivers/net/vxlan.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -998,6 +998,8 @@ static bool __vxlan_sock_release_prep(struct vxlan_sock *vs)
		spin_lock(&vn->sock_lock);
		hlist_del_rcu(&vs->hlist);
		udp_tunnel_notify_del_rx_port(vs->sock,
		(vs->flags & VXLAN_F_GPE) ?
		UDP_TUNNEL_TYPE_VXLAN_GPE :
		UDP_TUNNEL_TYPE_VXLAN);
		spin_unlock(&vn->sock_lock);

		@@ -2488,6 +2490,8 @@ static void vxlan_push_rx_ports(struct net_device *dev)
		for (i = 0; i < PORT_HASH_SIZE; ++i) {
		hlist_for_each_entry_rcu(vs, &vn->sock_list[i], hlist)
		udp_tunnel_push_rx_port(dev, vs->sock,
		(vs->flags & VXLAN_F_GPE) ?
		UDP_TUNNEL_TYPE_VXLAN_GPE :
		UDP_TUNNEL_TYPE_VXLAN);
		}
		spin_unlock(&vn->sock_lock);
		@@ -2691,6 +2695,8 @@ static struct vxlan_sock vxlan_socket_create(struct net net, bool ipv6,
		spin_lock(&vn->sock_lock);
		hlist_add_head_rcu(&vs->hlist, vs_head(net, port));
		udp_tunnel_notify_add_rx_port(sock,
		(vs->flags & VXLAN_F_GPE) ?
		UDP_TUNNEL_TYPE_VXLAN_GPE :
		UDP_TUNNEL_TYPE_VXLAN);
		spin_unlock(&vn->sock_lock);

include/net/udp_tunnel.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -103,6 +103,7 @@ void setup_udp_tunnel_sock(struct net net, struct socket sock,
		enum udp_parsable_tunnel_type {
		UDP_TUNNEL_TYPE_VXLAN, /* RFC 7348 */
		UDP_TUNNEL_TYPE_GENEVE, /* draft-ietf-nvo3-geneve */
		UDP_TUNNEL_TYPE_VXLAN_GPE, /* draft-ietf-nvo3-vxlan-gpe */
		};

		struct udp_tunnel_info {

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