[deliverable/linux.git] / include / net / vxlan.h

#ifndef __NET_VXLAN_H
#define __NET_VXLAN_H 1

#include <linux/ip.h>
#include <linux/ipv6.h>
#include <linux/if_vlan.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/udp.h>

#define VNI_HASH_BITS	10
#define VNI_HASH_SIZE	(1<<VNI_HASH_BITS)

/* VXLAN protocol header */
struct vxlanhdr {
	__be32 vx_flags;
	__be32 vx_vni;
};

/* VXLAN header flags. */
#define VXLAN_HF_VNI 0x08000000

#define VXLAN_N_VID     (1u << 24)
#define VXLAN_VID_MASK  (VXLAN_N_VID - 1)
#define VXLAN_HLEN (sizeof(struct udphdr) + sizeof(struct vxlanhdr))

struct vxlan_sock;
typedef void (vxlan_rcv_t)(struct vxlan_sock *vh, struct sk_buff *skb, __be32 key);

/* per UDP socket information */
struct vxlan_sock {
	struct hlist_node hlist;
	vxlan_rcv_t	 *rcv;
	void		 *data;
	struct work_struct del_work;
	struct socket	 *sock;
	struct rcu_head	  rcu;
	struct hlist_head vni_list[VNI_HASH_SIZE];
	atomic_t	  refcnt;
	struct udp_offload udp_offloads;
};

#define VXLAN_F_LEARN			0x01
#define VXLAN_F_PROXY			0x02
#define VXLAN_F_RSC			0x04
#define VXLAN_F_L2MISS			0x08
#define VXLAN_F_L3MISS			0x10
#define VXLAN_F_IPV6			0x20
#define VXLAN_F_UDP_CSUM		0x40
#define VXLAN_F_UDP_ZERO_CSUM6_TX	0x80
#define VXLAN_F_UDP_ZERO_CSUM6_RX	0x100

struct vxlan_sock *vxlan_sock_add(struct net *net, __be16 port,
				  vxlan_rcv_t *rcv, void *data,
				  bool no_share, u32 flags);

void vxlan_sock_release(struct vxlan_sock *vs);

int vxlan_xmit_skb(struct vxlan_sock *vs,
		   struct rtable *rt, struct sk_buff *skb,
		   __be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df,
		   __be16 src_port, __be16 dst_port, __be32 vni, bool xnet);

static inline netdev_features_t vxlan_features_check(struct sk_buff *skb,
						     netdev_features_t features)
{
	u8 l4_hdr = 0;

	if (!skb->encapsulation)
		return features;

	switch (vlan_get_protocol(skb)) {
	case htons(ETH_P_IP):
		l4_hdr = ip_hdr(skb)->protocol;
		break;
	case htons(ETH_P_IPV6):
		l4_hdr = ipv6_hdr(skb)->nexthdr;
		break;
	default:
		return features;;
	}

	if ((l4_hdr == IPPROTO_UDP) &&
	    (skb->inner_protocol_type != ENCAP_TYPE_ETHER ||
	     skb->inner_protocol != htons(ETH_P_TEB) ||
	     (skb_inner_mac_header(skb) - skb_transport_header(skb) !=
	      sizeof(struct udphdr) + sizeof(struct vxlanhdr))))
		return features & ~(NETIF_F_ALL_CSUM | NETIF_F_GSO_MASK);

	return features;
}

/* IP header + UDP + VXLAN + Ethernet header */
#define VXLAN_HEADROOM (20 + 8 + 8 + 14)
/* IPv6 header + UDP + VXLAN + Ethernet header */
#define VXLAN6_HEADROOM (40 + 8 + 8 + 14)

#if IS_ENABLED(CONFIG_VXLAN)
void vxlan_get_rx_port(struct net_device *netdev);
#else
static inline void vxlan_get_rx_port(struct net_device *netdev)
{
}
#endif
#endif
Commit	Line	Data
012a5729 PS	1	#ifndef __NET_VXLAN_H
	2	#define __NET_VXLAN_H 1
	3
5f35227e JG	4	#include <linux/ip.h>
	5	#include <linux/ipv6.h>
	6	#include <linux/if_vlan.h>
012a5729 PS	7	#include <linux/skbuff.h>
	8	#include <linux/netdevice.h>
	9	#include <linux/udp.h>
	10
	11	#define VNI_HASH_BITS 10
	12	#define VNI_HASH_SIZE (1<<VNI_HASH_BITS)
	13
11bf7828 JS	14	/* VXLAN protocol header */
	15	struct vxlanhdr {
	16	__be32 vx_flags;
	17	__be32 vx_vni;
	18	};
	19
3bf39475 TH	20	/* VXLAN header flags. */
	21	#define VXLAN_HF_VNI 0x08000000
	22
	23	#define VXLAN_N_VID (1u << 24)
	24	#define VXLAN_VID_MASK (VXLAN_N_VID - 1)
	25	#define VXLAN_HLEN (sizeof(struct udphdr) + sizeof(struct vxlanhdr))
	26
012a5729 PS	27	struct vxlan_sock;
	28	typedef void (vxlan_rcv_t)(struct vxlan_sock vh, struct sk_buff skb, __be32 key);
	29
	30	/* per UDP socket information */
	31	struct vxlan_sock {
	32	struct hlist_node hlist;
	33	vxlan_rcv_t *rcv;
	34	void *data;
	35	struct work_struct del_work;
	36	struct socket *sock;
	37	struct rcu_head rcu;
	38	struct hlist_head vni_list[VNI_HASH_SIZE];
	39	atomic_t refcnt;
dc01e7d3	40	struct udp_offload udp_offloads;
012a5729 PS	41	};
012a5729 PS	42
359a0ea9 TH	43	#define VXLAN_F_LEARN 0x01
	44	#define VXLAN_F_PROXY 0x02
	45	#define VXLAN_F_RSC 0x04
	46	#define VXLAN_F_L2MISS 0x08
	47	#define VXLAN_F_L3MISS 0x10
	48	#define VXLAN_F_IPV6 0x20
	49	#define VXLAN_F_UDP_CSUM 0x40
	50	#define VXLAN_F_UDP_ZERO_CSUM6_TX 0x80
	51	#define VXLAN_F_UDP_ZERO_CSUM6_RX 0x100
	52
012a5729 PS	53	struct vxlan_sock vxlan_sock_add(struct net net, __be16 port,
012a5729 PS	54	vxlan_rcv_t rcv, void data,
359a0ea9	55	bool no_share, u32 flags);
012a5729 PS	56
012a5729 PS	57	void vxlan_sock_release(struct vxlan_sock *vs);
49560532	58
11796187	59	int vxlan_xmit_skb(struct vxlan_sock *vs,
49560532 PS	60	struct rtable rt, struct sk_buff skb,
49560532 PS	61	__be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df,
f01ec1c0	62	__be16 src_port, __be16 dst_port, __be32 vni, bool xnet);
49560532	63
5f35227e JG	64	static inline netdev_features_t vxlan_features_check(struct sk_buff *skb,
5f35227e JG	65	netdev_features_t features)
11bf7828	66	{
5f35227e JG	67	u8 l4_hdr = 0;
	68
	69	if (!skb->encapsulation)
	70	return features;
	71
	72	switch (vlan_get_protocol(skb)) {
	73	case htons(ETH_P_IP):
	74	l4_hdr = ip_hdr(skb)->protocol;
	75	break;
	76	case htons(ETH_P_IPV6):
	77	l4_hdr = ipv6_hdr(skb)->nexthdr;
	78	break;
	79	default:
	80	return features;;
	81	}
	82
	83	if ((l4_hdr == IPPROTO_UDP) &&
11bf7828 JS	84	(skb->inner_protocol_type != ENCAP_TYPE_ETHER \|\|
	85	skb->inner_protocol != htons(ETH_P_TEB) \|\|
	86	(skb_inner_mac_header(skb) - skb_transport_header(skb) !=
	87	sizeof(struct udphdr) + sizeof(struct vxlanhdr))))
5f35227e	88	return features & ~(NETIF_F_ALL_CSUM \| NETIF_F_GSO_MASK);
11bf7828	89
5f35227e	90	return features;
11bf7828	91	}
23e62de3	92
e6cd988c JG	93	/* IP header + UDP + VXLAN + Ethernet header */
	94	#define VXLAN_HEADROOM (20 + 8 + 8 + 14)
	95	/* IPv6 header + UDP + VXLAN + Ethernet header */
	96	#define VXLAN6_HEADROOM (40 + 8 + 8 + 14)
	97
	98	#if IS_ENABLED(CONFIG_VXLAN)
53cf5275	99	void vxlan_get_rx_port(struct net_device *netdev);
e6cd988c JG	100	#else
	101	static inline void vxlan_get_rx_port(struct net_device *netdev)
	102	{
	103	}
	104	#endif
012a5729	105	#endif