xref: /openbmc/linux/include/net/vxlan.h (revision 6774def6)
1 #ifndef __NET_VXLAN_H
2 #define __NET_VXLAN_H 1
3 
4 #include <linux/skbuff.h>
5 #include <linux/netdevice.h>
6 #include <linux/udp.h>
7 
8 #define VNI_HASH_BITS	10
9 #define VNI_HASH_SIZE	(1<<VNI_HASH_BITS)
10 
11 struct vxlan_sock;
12 typedef void (vxlan_rcv_t)(struct vxlan_sock *vh, struct sk_buff *skb, __be32 key);
13 
14 /* per UDP socket information */
15 struct vxlan_sock {
16 	struct hlist_node hlist;
17 	vxlan_rcv_t	 *rcv;
18 	void		 *data;
19 	struct work_struct del_work;
20 	struct socket	 *sock;
21 	struct rcu_head	  rcu;
22 	struct hlist_head vni_list[VNI_HASH_SIZE];
23 	atomic_t	  refcnt;
24 	struct udp_offload udp_offloads;
25 };
26 
27 #define VXLAN_F_LEARN			0x01
28 #define VXLAN_F_PROXY			0x02
29 #define VXLAN_F_RSC			0x04
30 #define VXLAN_F_L2MISS			0x08
31 #define VXLAN_F_L3MISS			0x10
32 #define VXLAN_F_IPV6			0x20
33 #define VXLAN_F_UDP_CSUM		0x40
34 #define VXLAN_F_UDP_ZERO_CSUM6_TX	0x80
35 #define VXLAN_F_UDP_ZERO_CSUM6_RX	0x100
36 
37 struct vxlan_sock *vxlan_sock_add(struct net *net, __be16 port,
38 				  vxlan_rcv_t *rcv, void *data,
39 				  bool no_share, u32 flags);
40 
41 void vxlan_sock_release(struct vxlan_sock *vs);
42 
43 int vxlan_xmit_skb(struct vxlan_sock *vs,
44 		   struct rtable *rt, struct sk_buff *skb,
45 		   __be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df,
46 		   __be16 src_port, __be16 dst_port, __be32 vni, bool xnet);
47 
48 /* IP header + UDP + VXLAN + Ethernet header */
49 #define VXLAN_HEADROOM (20 + 8 + 8 + 14)
50 /* IPv6 header + UDP + VXLAN + Ethernet header */
51 #define VXLAN6_HEADROOM (40 + 8 + 8 + 14)
52 
53 #if IS_ENABLED(CONFIG_VXLAN)
54 void vxlan_get_rx_port(struct net_device *netdev);
55 #else
56 static inline void vxlan_get_rx_port(struct net_device *netdev)
57 {
58 }
59 #endif
60 #endif
61