2 #define __NET_VXLAN_H 1
5 #include <linux/ipv6.h>
6 #include <linux/if_vlan.h>
7 #include <linux/skbuff.h>
8 #include <linux/netdevice.h>
11 #define VNI_HASH_BITS 10
12 #define VNI_HASH_SIZE (1<<VNI_HASH_BITS)
14 /* VXLAN protocol header */
20 /* VXLAN header flags. */
21 #define VXLAN_HF_VNI 0x08000000
22 #define VXLAN_HF_RCO 0x00200000
24 /* Remote checksum offload header option */
25 #define VXLAN_RCO_MASK 0x7f /* Last byte of vni field */
26 #define VXLAN_RCO_UDP 0x80 /* Indicate UDP RCO (TCP when not set *) */
27 #define VXLAN_RCO_SHIFT 1 /* Left shift of start */
28 #define VXLAN_RCO_SHIFT_MASK ((1 << VXLAN_RCO_SHIFT) - 1)
29 #define VXLAN_MAX_REMCSUM_START (VXLAN_RCO_MASK << VXLAN_RCO_SHIFT)
31 #define VXLAN_N_VID (1u << 24)
32 #define VXLAN_VID_MASK (VXLAN_N_VID - 1)
33 #define VXLAN_HLEN (sizeof(struct udphdr) + sizeof(struct vxlanhdr))
36 typedef void (vxlan_rcv_t)(struct vxlan_sock *vh, struct sk_buff *skb, __be32 key);
38 /* per UDP socket information */
40 struct hlist_node hlist;
43 struct work_struct del_work;
46 struct hlist_head vni_list[VNI_HASH_SIZE];
48 struct udp_offload udp_offloads;
52 #define VXLAN_F_LEARN 0x01
53 #define VXLAN_F_PROXY 0x02
54 #define VXLAN_F_RSC 0x04
55 #define VXLAN_F_L2MISS 0x08
56 #define VXLAN_F_L3MISS 0x10
57 #define VXLAN_F_IPV6 0x20
58 #define VXLAN_F_UDP_CSUM 0x40
59 #define VXLAN_F_UDP_ZERO_CSUM6_TX 0x80
60 #define VXLAN_F_UDP_ZERO_CSUM6_RX 0x100
61 #define VXLAN_F_REMCSUM_TX 0x200
62 #define VXLAN_F_REMCSUM_RX 0x400
64 struct vxlan_sock *vxlan_sock_add(struct net *net, __be16 port,
65 vxlan_rcv_t *rcv, void *data,
66 bool no_share, u32 flags);
68 void vxlan_sock_release(struct vxlan_sock *vs);
70 int vxlan_xmit_skb(struct vxlan_sock *vs,
71 struct rtable *rt, struct sk_buff *skb,
72 __be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df,
73 __be16 src_port, __be16 dst_port, __be32 vni, bool xnet);
75 static inline netdev_features_t vxlan_features_check(struct sk_buff *skb,
76 netdev_features_t features)
80 if (!skb->encapsulation)
83 switch (vlan_get_protocol(skb)) {
85 l4_hdr = ip_hdr(skb)->protocol;
87 case htons(ETH_P_IPV6):
88 l4_hdr = ipv6_hdr(skb)->nexthdr;
94 if ((l4_hdr == IPPROTO_UDP) &&
95 (skb->inner_protocol_type != ENCAP_TYPE_ETHER ||
96 skb->inner_protocol != htons(ETH_P_TEB) ||
97 (skb_inner_mac_header(skb) - skb_transport_header(skb) !=
98 sizeof(struct udphdr) + sizeof(struct vxlanhdr))))
99 return features & ~(NETIF_F_ALL_CSUM | NETIF_F_GSO_MASK);
104 /* IP header + UDP + VXLAN + Ethernet header */
105 #define VXLAN_HEADROOM (20 + 8 + 8 + 14)
106 /* IPv6 header + UDP + VXLAN + Ethernet header */
107 #define VXLAN6_HEADROOM (40 + 8 + 8 + 14)
109 #if IS_ENABLED(CONFIG_VXLAN)
110 void vxlan_get_rx_port(struct net_device *netdev);
112 static inline void vxlan_get_rx_port(struct net_device *netdev)