Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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 */
12struct vxlanhdr {
13 __be32 vx_flags;
14 __be32 vx_vni;
15};
16
17struct vxlan_sock;
18typedef void (vxlan_rcv_t)(struct vxlan_sock *vh, struct sk_buff *skb, __be32 key);
19
20/* per UDP socket information */
21struct 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
43struct vxlan_sock *vxlan_sock_add(struct net *net, __be16 port,
44 vxlan_rcv_t *rcv, void *data,
45 bool no_share, u32 flags);
46
47void vxlan_sock_release(struct vxlan_sock *vs);
48
49int 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
54static 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)
72void vxlan_get_rx_port(struct net_device *netdev);
73#else
74static inline void vxlan_get_rx_port(struct net_device *netdev)
75{
76}
77#endif
78#endif