1012a5729SPravin B Shelar #ifndef __NET_VXLAN_H 2012a5729SPravin B Shelar #define __NET_VXLAN_H 1 3012a5729SPravin B Shelar 45f35227eSJesse Gross #include <linux/ip.h> 55f35227eSJesse Gross #include <linux/ipv6.h> 65f35227eSJesse Gross #include <linux/if_vlan.h> 7012a5729SPravin B Shelar #include <linux/skbuff.h> 8012a5729SPravin B Shelar #include <linux/netdevice.h> 9012a5729SPravin B Shelar #include <linux/udp.h> 10012a5729SPravin B Shelar 11012a5729SPravin B Shelar #define VNI_HASH_BITS 10 12012a5729SPravin B Shelar #define VNI_HASH_SIZE (1<<VNI_HASH_BITS) 13012a5729SPravin B Shelar 1411bf7828SJoe Stringer /* VXLAN protocol header */ 1511bf7828SJoe Stringer struct vxlanhdr { 1611bf7828SJoe Stringer __be32 vx_flags; 1711bf7828SJoe Stringer __be32 vx_vni; 1811bf7828SJoe Stringer }; 1911bf7828SJoe Stringer 203bf39475STom Herbert /* VXLAN header flags. */ 213bf39475STom Herbert #define VXLAN_HF_VNI 0x08000000 223bf39475STom Herbert 233bf39475STom Herbert #define VXLAN_N_VID (1u << 24) 243bf39475STom Herbert #define VXLAN_VID_MASK (VXLAN_N_VID - 1) 253bf39475STom Herbert #define VXLAN_HLEN (sizeof(struct udphdr) + sizeof(struct vxlanhdr)) 263bf39475STom Herbert 27012a5729SPravin B Shelar struct vxlan_sock; 28012a5729SPravin B Shelar typedef void (vxlan_rcv_t)(struct vxlan_sock *vh, struct sk_buff *skb, __be32 key); 29012a5729SPravin B Shelar 30012a5729SPravin B Shelar /* per UDP socket information */ 31012a5729SPravin B Shelar struct vxlan_sock { 32012a5729SPravin B Shelar struct hlist_node hlist; 33012a5729SPravin B Shelar vxlan_rcv_t *rcv; 34012a5729SPravin B Shelar void *data; 35012a5729SPravin B Shelar struct work_struct del_work; 36012a5729SPravin B Shelar struct socket *sock; 37012a5729SPravin B Shelar struct rcu_head rcu; 38012a5729SPravin B Shelar struct hlist_head vni_list[VNI_HASH_SIZE]; 39012a5729SPravin B Shelar atomic_t refcnt; 40dc01e7d3SOr Gerlitz struct udp_offload udp_offloads; 41012a5729SPravin B Shelar }; 42012a5729SPravin B Shelar 43359a0ea9STom Herbert #define VXLAN_F_LEARN 0x01 44359a0ea9STom Herbert #define VXLAN_F_PROXY 0x02 45359a0ea9STom Herbert #define VXLAN_F_RSC 0x04 46359a0ea9STom Herbert #define VXLAN_F_L2MISS 0x08 47359a0ea9STom Herbert #define VXLAN_F_L3MISS 0x10 48359a0ea9STom Herbert #define VXLAN_F_IPV6 0x20 49359a0ea9STom Herbert #define VXLAN_F_UDP_CSUM 0x40 50359a0ea9STom Herbert #define VXLAN_F_UDP_ZERO_CSUM6_TX 0x80 51359a0ea9STom Herbert #define VXLAN_F_UDP_ZERO_CSUM6_RX 0x100 52359a0ea9STom Herbert 53012a5729SPravin B Shelar struct vxlan_sock *vxlan_sock_add(struct net *net, __be16 port, 54012a5729SPravin B Shelar vxlan_rcv_t *rcv, void *data, 55359a0ea9STom Herbert bool no_share, u32 flags); 56012a5729SPravin B Shelar 57012a5729SPravin B Shelar void vxlan_sock_release(struct vxlan_sock *vs); 5849560532SPravin B Shelar 5911796187SNicolas Dichtel int vxlan_xmit_skb(struct vxlan_sock *vs, 6049560532SPravin B Shelar struct rtable *rt, struct sk_buff *skb, 6149560532SPravin B Shelar __be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df, 62f01ec1c0SNicolas Dichtel __be16 src_port, __be16 dst_port, __be32 vni, bool xnet); 6349560532SPravin B Shelar 645f35227eSJesse Gross static inline netdev_features_t vxlan_features_check(struct sk_buff *skb, 655f35227eSJesse Gross netdev_features_t features) 6611bf7828SJoe Stringer { 675f35227eSJesse Gross u8 l4_hdr = 0; 685f35227eSJesse Gross 695f35227eSJesse Gross if (!skb->encapsulation) 705f35227eSJesse Gross return features; 715f35227eSJesse Gross 725f35227eSJesse Gross switch (vlan_get_protocol(skb)) { 735f35227eSJesse Gross case htons(ETH_P_IP): 745f35227eSJesse Gross l4_hdr = ip_hdr(skb)->protocol; 755f35227eSJesse Gross break; 765f35227eSJesse Gross case htons(ETH_P_IPV6): 775f35227eSJesse Gross l4_hdr = ipv6_hdr(skb)->nexthdr; 785f35227eSJesse Gross break; 795f35227eSJesse Gross default: 805f35227eSJesse Gross return features;; 815f35227eSJesse Gross } 825f35227eSJesse Gross 835f35227eSJesse Gross if ((l4_hdr == IPPROTO_UDP) && 8411bf7828SJoe Stringer (skb->inner_protocol_type != ENCAP_TYPE_ETHER || 8511bf7828SJoe Stringer skb->inner_protocol != htons(ETH_P_TEB) || 8611bf7828SJoe Stringer (skb_inner_mac_header(skb) - skb_transport_header(skb) != 8711bf7828SJoe Stringer sizeof(struct udphdr) + sizeof(struct vxlanhdr)))) 885f35227eSJesse Gross return features & ~(NETIF_F_ALL_CSUM | NETIF_F_GSO_MASK); 8911bf7828SJoe Stringer 905f35227eSJesse Gross return features; 9111bf7828SJoe Stringer } 9223e62de3SJoe Stringer 93e6cd988cSJoseph Gasparakis /* IP header + UDP + VXLAN + Ethernet header */ 94e6cd988cSJoseph Gasparakis #define VXLAN_HEADROOM (20 + 8 + 8 + 14) 95e6cd988cSJoseph Gasparakis /* IPv6 header + UDP + VXLAN + Ethernet header */ 96e6cd988cSJoseph Gasparakis #define VXLAN6_HEADROOM (40 + 8 + 8 + 14) 97e6cd988cSJoseph Gasparakis 98e6cd988cSJoseph Gasparakis #if IS_ENABLED(CONFIG_VXLAN) 9953cf5275SJoseph Gasparakis void vxlan_get_rx_port(struct net_device *netdev); 100e6cd988cSJoseph Gasparakis #else 101e6cd988cSJoseph Gasparakis static inline void vxlan_get_rx_port(struct net_device *netdev) 102e6cd988cSJoseph Gasparakis { 103e6cd988cSJoseph Gasparakis } 104e6cd988cSJoseph Gasparakis #endif 105012a5729SPravin B Shelar #endif 106