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 /* VXLAN protocol header */ 12 struct vxlanhdr { 13 __be32 vx_flags; 14 __be32 vx_vni; 15 }; 16 17 struct vxlan_sock; 18 typedef void (vxlan_rcv_t)(struct vxlan_sock *vh, struct sk_buff *skb, __be32 key); 19 20 /* per UDP socket information */ 21 struct vxlan_sock { 22 struct hlist_node hlist; 23 vxlan_rcv_t *rcv; 24 void *data; 25 struct work_struct del_work; 26 struct socket *sock; 27 struct rcu_head rcu; 28 struct hlist_head vni_list[VNI_HASH_SIZE]; 29 atomic_t refcnt; 30 struct udp_offload udp_offloads; 31 }; 32 33 #define VXLAN_F_LEARN 0x01 34 #define VXLAN_F_PROXY 0x02 35 #define VXLAN_F_RSC 0x04 36 #define VXLAN_F_L2MISS 0x08 37 #define VXLAN_F_L3MISS 0x10 38 #define VXLAN_F_IPV6 0x20 39 #define VXLAN_F_UDP_CSUM 0x40 40 #define VXLAN_F_UDP_ZERO_CSUM6_TX 0x80 41 #define VXLAN_F_UDP_ZERO_CSUM6_RX 0x100 42 43 struct vxlan_sock *vxlan_sock_add(struct net *net, __be16 port, 44 vxlan_rcv_t *rcv, void *data, 45 bool no_share, u32 flags); 46 47 void vxlan_sock_release(struct vxlan_sock *vs); 48 49 int vxlan_xmit_skb(struct vxlan_sock *vs, 50 struct rtable *rt, struct sk_buff *skb, 51 __be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df, 52 __be16 src_port, __be16 dst_port, __be32 vni, bool xnet); 53 54 static inline bool vxlan_gso_check(struct sk_buff *skb) 55 { 56 if ((skb_shinfo(skb)->gso_type & SKB_GSO_UDP_TUNNEL) && 57 (skb->inner_protocol_type != ENCAP_TYPE_ETHER || 58 skb->inner_protocol != htons(ETH_P_TEB) || 59 (skb_inner_mac_header(skb) - skb_transport_header(skb) != 60 sizeof(struct udphdr) + sizeof(struct vxlanhdr)))) 61 return false; 62 63 return true; 64 } 65 66 /* IP header + UDP + VXLAN + Ethernet header */ 67 #define VXLAN_HEADROOM (20 + 8 + 8 + 14) 68 /* IPv6 header + UDP + VXLAN + Ethernet header */ 69 #define VXLAN6_HEADROOM (40 + 8 + 8 + 14) 70 71 #if IS_ENABLED(CONFIG_VXLAN) 72 void vxlan_get_rx_port(struct net_device *netdev); 73 #else 74 static inline void vxlan_get_rx_port(struct net_device *netdev) 75 { 76 } 77 #endif 78 #endif 79