Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / include / net / udp_tunnel.h

diff --git a/kernel/include/net/udp_tunnel.h b/kernel/include/net/udp_tunnel.h
new file mode 100644 (file)
index 0000000..c491c12
--- /dev/null
+++ b/kernel/include/net/udp_tunnel.h
@@ -0,0 +1,123 @@
+#ifndef __NET_UDP_TUNNEL_H
+#define __NET_UDP_TUNNEL_H
+
+#include <net/ip_tunnels.h>
+#include <net/udp.h>
+
+#if IS_ENABLED(CONFIG_IPV6)
+#include <net/ipv6.h>
+#include <net/addrconf.h>
+#endif
+
+struct udp_port_cfg {
+       u8                      family;
+
+       /* Used only for kernel-created sockets */
+       union {
+               struct in_addr          local_ip;
+#if IS_ENABLED(CONFIG_IPV6)
+               struct in6_addr         local_ip6;
+#endif
+       };
+
+       union {
+               struct in_addr          peer_ip;
+#if IS_ENABLED(CONFIG_IPV6)
+               struct in6_addr         peer_ip6;
+#endif
+       };
+
+       __be16                  local_udp_port;
+       __be16                  peer_udp_port;
+       unsigned int            use_udp_checksums:1,
+                               use_udp6_tx_checksums:1,
+                               use_udp6_rx_checksums:1;
+};
+
+int udp_sock_create4(struct net *net, struct udp_port_cfg *cfg,
+                    struct socket **sockp);
+
+#if IS_ENABLED(CONFIG_IPV6)
+int udp_sock_create6(struct net *net, struct udp_port_cfg *cfg,
+                    struct socket **sockp);
+#else
+static inline int udp_sock_create6(struct net *net, struct udp_port_cfg *cfg,
+                                  struct socket **sockp)
+{
+       return 0;
+}
+#endif
+
+static inline int udp_sock_create(struct net *net,
+                                 struct udp_port_cfg *cfg,
+                                 struct socket **sockp)
+{
+       if (cfg->family == AF_INET)
+               return udp_sock_create4(net, cfg, sockp);
+
+       if (cfg->family == AF_INET6)
+               return udp_sock_create6(net, cfg, sockp);
+
+       return -EPFNOSUPPORT;
+}
+
+typedef int (*udp_tunnel_encap_rcv_t)(struct sock *sk, struct sk_buff *skb);
+typedef void (*udp_tunnel_encap_destroy_t)(struct sock *sk);
+
+struct udp_tunnel_sock_cfg {
+       void *sk_user_data;     /* user data used by encap_rcv call back */
+       /* Used for setting up udp_sock fields, see udp.h for details */
+       __u8  encap_type;
+       udp_tunnel_encap_rcv_t encap_rcv;
+       udp_tunnel_encap_destroy_t encap_destroy;
+};
+
+/* Setup the given (UDP) sock to receive UDP encapsulated packets */
+void setup_udp_tunnel_sock(struct net *net, struct socket *sock,
+                          struct udp_tunnel_sock_cfg *sock_cfg);
+
+/* Transmit the skb using UDP encapsulation. */
+int udp_tunnel_xmit_skb(struct rtable *rt, struct sock *sk, struct sk_buff *skb,
+                       __be32 src, __be32 dst, __u8 tos, __u8 ttl,
+                       __be16 df, __be16 src_port, __be16 dst_port,
+                       bool xnet, bool nocheck);
+
+#if IS_ENABLED(CONFIG_IPV6)
+int udp_tunnel6_xmit_skb(struct dst_entry *dst, struct sock *sk,
+                        struct sk_buff *skb,
+                        struct net_device *dev, struct in6_addr *saddr,
+                        struct in6_addr *daddr,
+                        __u8 prio, __u8 ttl, __be16 src_port,
+                        __be16 dst_port, bool nocheck);
+#endif
+
+void udp_tunnel_sock_release(struct socket *sock);
+
+static inline struct sk_buff *udp_tunnel_handle_offloads(struct sk_buff *skb,
+                                                        bool udp_csum)
+{
+       int type = udp_csum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL;
+
+       return iptunnel_handle_offloads(skb, udp_csum, type);
+}
+
+static inline void udp_tunnel_gro_complete(struct sk_buff *skb, int nhoff)
+{
+       struct udphdr *uh;
+
+       uh = (struct udphdr *)(skb->data + nhoff - sizeof(struct udphdr));
+       skb_shinfo(skb)->gso_type |= uh->check ?
+                               SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL;
+}
+
+static inline void udp_tunnel_encap_enable(struct socket *sock)
+{
+#if IS_ENABLED(CONFIG_IPV6)
+       if (sock->sk->sk_family == PF_INET6)
+               ipv6_stub->udpv6_encap_enable();
+       else
+#endif
+               udp_encap_enable();
+}
+
+#endif