[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>
#include <net/dst_metadata.h>

/* VXLAN protocol (RFC 7348) header:
 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 * |R|R|R|R|I|R|R|R|               Reserved                        |
 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 * |                VXLAN Network Identifier (VNI) |   Reserved    |
 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 *
 * I = VXLAN Network Identifier (VNI) present.
 */
struct vxlanhdr {
	__be32 vx_flags;
	__be32 vx_vni;
};

/* VXLAN header flags. */
#define VXLAN_HF_VNI	cpu_to_be32(BIT(27))

#define VXLAN_N_VID     (1u << 24)
#define VXLAN_VID_MASK  (VXLAN_N_VID - 1)
#define VXLAN_VNI_MASK	cpu_to_be32(VXLAN_VID_MASK << 8)
#define VXLAN_HLEN (sizeof(struct udphdr) + sizeof(struct vxlanhdr))

#define VNI_HASH_BITS	10
#define VNI_HASH_SIZE	(1<<VNI_HASH_BITS)
#define FDB_HASH_BITS	8
#define FDB_HASH_SIZE	(1<<FDB_HASH_BITS)

/* Remote checksum offload for VXLAN (VXLAN_F_REMCSUM_[RT]X):
 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 * |R|R|R|R|I|R|R|R|R|R|C|              Reserved                   |
 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 * |           VXLAN Network Identifier (VNI)      |O| Csum start  |
 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 *
 * C = Remote checksum offload bit. When set indicates that the
 *     remote checksum offload data is present.
 *
 * O = Offset bit. Indicates the checksum offset relative to
 *     checksum start.
 *
 * Csum start = Checksum start divided by two.
 *
 * http://tools.ietf.org/html/draft-herbert-vxlan-rco
 */

/* VXLAN-RCO header flags. */
#define VXLAN_HF_RCO	cpu_to_be32(BIT(21))

/* Remote checksum offload header option */
#define VXLAN_RCO_MASK	cpu_to_be32(0x7f)  /* Last byte of vni field */
#define VXLAN_RCO_UDP	cpu_to_be32(0x80)  /* Indicate UDP RCO (TCP when not set *) */
#define VXLAN_RCO_SHIFT	1		   /* Left shift of start */
#define VXLAN_RCO_SHIFT_MASK ((1 << VXLAN_RCO_SHIFT) - 1)
#define VXLAN_MAX_REMCSUM_START (0x7f << VXLAN_RCO_SHIFT)

/*
 * VXLAN Group Based Policy Extension (VXLAN_F_GBP):
 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 * |G|R|R|R|I|R|R|R|R|D|R|R|A|R|R|R|        Group Policy ID        |
 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 * |                VXLAN Network Identifier (VNI) |   Reserved    |
 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 *
 * G = Group Policy ID present.
 *
 * D = Don't Learn bit. When set, this bit indicates that the egress
 *     VTEP MUST NOT learn the source address of the encapsulated frame.
 *
 * A = Indicates that the group policy has already been applied to
 *     this packet. Policies MUST NOT be applied by devices when the
 *     A bit is set.
 *
 * https://tools.ietf.org/html/draft-smith-vxlan-group-policy
 */
struct vxlanhdr_gbp {
	u8	vx_flags;
#ifdef __LITTLE_ENDIAN_BITFIELD
	u8	reserved_flags1:3,
		policy_applied:1,
		reserved_flags2:2,
		dont_learn:1,
		reserved_flags3:1;
#elif defined(__BIG_ENDIAN_BITFIELD)
	u8	reserved_flags1:1,
		dont_learn:1,
		reserved_flags2:2,
		policy_applied:1,
		reserved_flags3:3;
#else
#error	"Please fix <asm/byteorder.h>"
#endif
	__be16	policy_id;
	__be32	vx_vni;
};

/* VXLAN-GBP header flags. */
#define VXLAN_HF_GBP	cpu_to_be32(BIT(31))

#define VXLAN_GBP_USED_BITS (VXLAN_HF_GBP | cpu_to_be32(0xFFFFFF))

/* skb->mark mapping
 *
 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 * |R|R|R|R|R|R|R|R|R|D|R|R|A|R|R|R|        Group Policy ID        |
 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 */
#define VXLAN_GBP_DONT_LEARN		(BIT(6) << 16)
#define VXLAN_GBP_POLICY_APPLIED	(BIT(3) << 16)
#define VXLAN_GBP_ID_MASK		(0xFFFF)

struct vxlan_metadata {
	u32		gbp;
};

/* per UDP socket information */
struct vxlan_sock {
	struct hlist_node hlist;
	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;
	u32		  flags;
};

union vxlan_addr {
	struct sockaddr_in sin;
	struct sockaddr_in6 sin6;
	struct sockaddr sa;
};

struct vxlan_rdst {
	union vxlan_addr	 remote_ip;
	__be16			 remote_port;
	__be32			 remote_vni;
	u32			 remote_ifindex;
	struct list_head	 list;
	struct rcu_head		 rcu;
	struct dst_cache	 dst_cache;
};

struct vxlan_config {
	union vxlan_addr	remote_ip;
	union vxlan_addr	saddr;
	__be32			vni;
	int			remote_ifindex;
	int			mtu;
	__be16			dst_port;
	u16			port_min;
	u16			port_max;
	u8			tos;
	u8			ttl;
	__be32			label;
	u32			flags;
	unsigned long		age_interval;
	unsigned int		addrmax;
	bool			no_share;
};

/* Pseudo network device */
struct vxlan_dev {
	struct hlist_node hlist;	/* vni hash table */
	struct list_head  next;		/* vxlan's per namespace list */
	struct vxlan_sock *vn4_sock;	/* listening socket for IPv4 */
#if IS_ENABLED(CONFIG_IPV6)
	struct vxlan_sock *vn6_sock;	/* listening socket for IPv6 */
#endif
	struct net_device *dev;
	struct net	  *net;		/* netns for packet i/o */
	struct vxlan_rdst default_dst;	/* default destination */
	u32		  flags;	/* VXLAN_F_* in vxlan.h */

	struct timer_list age_timer;
	spinlock_t	  hash_lock;
	unsigned int	  addrcnt;
	struct gro_cells  gro_cells;

	struct vxlan_config	cfg;

	struct hlist_head fdb_head[FDB_HASH_SIZE];
};

#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_ZERO_CSUM_TX	0x40
#define VXLAN_F_UDP_ZERO_CSUM6_TX	0x80
#define VXLAN_F_UDP_ZERO_CSUM6_RX	0x100
#define VXLAN_F_REMCSUM_TX		0x200
#define VXLAN_F_REMCSUM_RX		0x400
#define VXLAN_F_GBP			0x800
#define VXLAN_F_REMCSUM_NOPARTIAL	0x1000
#define VXLAN_F_COLLECT_METADATA	0x2000

/* Flags that are used in the receive path. These flags must match in
 * order for a socket to be shareable
 */
#define VXLAN_F_RCV_FLAGS		(VXLAN_F_GBP |			\
					 VXLAN_F_UDP_ZERO_CSUM6_RX |	\
					 VXLAN_F_REMCSUM_RX |		\
					 VXLAN_F_REMCSUM_NOPARTIAL |	\
					 VXLAN_F_COLLECT_METADATA)

struct net_device *vxlan_dev_create(struct net *net, const char *name,
				    u8 name_assign_type, struct vxlan_config *conf);

static inline __be16 vxlan_dev_dst_port(struct vxlan_dev *vxlan,
					unsigned short family)
{
#if IS_ENABLED(CONFIG_IPV6)
	if (family == AF_INET6)
		return inet_sk(vxlan->vn6_sock->sock->sk)->inet_sport;
#endif
	return inet_sk(vxlan->vn4_sock->sock->sk)->inet_sport;
}

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)) ||
	     (skb->ip_summed != CHECKSUM_NONE &&
	      !can_checksum_protocol(features, inner_eth_hdr(skb)->h_proto))))
		return features & ~(NETIF_F_CSUM_MASK | 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)

static inline struct vxlanhdr *vxlan_hdr(struct sk_buff *skb)
{
	return (struct vxlanhdr *)(udp_hdr(skb) + 1);
}

static inline __be32 vxlan_vni(__be32 vni_field)
{
#if defined(__BIG_ENDIAN)
	return (__force __be32)((__force u32)vni_field >> 8);
#else
	return (__force __be32)((__force u32)(vni_field & VXLAN_VNI_MASK) << 8);
#endif
}

static inline __be32 vxlan_vni_field(__be32 vni)
{
#if defined(__BIG_ENDIAN)
	return (__force __be32)((__force u32)vni << 8);
#else
	return (__force __be32)((__force u32)vni >> 8);
#endif
}

static inline __be32 vxlan_tun_id_to_vni(__be64 tun_id)
{
#if defined(__BIG_ENDIAN)
	return (__force __be32)tun_id;
#else
	return (__force __be32)((__force u64)tun_id >> 32);
#endif
}

static inline __be64 vxlan_vni_to_tun_id(__be32 vni)
{
#if defined(__BIG_ENDIAN)
	return (__force __be64)vni;
#else
	return (__force __be64)((u64)(__force u32)vni << 32);
#endif
}

static inline size_t vxlan_rco_start(__be32 vni_field)
{
	return be32_to_cpu(vni_field & VXLAN_RCO_MASK) << VXLAN_RCO_SHIFT;
}

static inline size_t vxlan_rco_offset(__be32 vni_field)
{
	return (vni_field & VXLAN_RCO_UDP) ?
		offsetof(struct udphdr, check) :
		offsetof(struct tcphdr, check);
}

static inline __be32 vxlan_compute_rco(unsigned int start, unsigned int offset)
{
	__be32 vni_field = cpu_to_be32(start >> VXLAN_RCO_SHIFT);

	if (offset == offsetof(struct udphdr, check))
		vni_field |= VXLAN_RCO_UDP;
	return vni_field;
}

#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

static inline unsigned short vxlan_get_sk_family(struct vxlan_sock *vs)
{
	return vs->sock->sk->sk_family;
}

#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>
ee122c79	10	#include <net/dst_metadata.h>
012a5729	11
828788ac JB	12	/* VXLAN protocol (RFC 7348) header:
	13	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	14	* \|R\|R\|R\|R\|I\|R\|R\|R\| Reserved \|
	15	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	16	* \| VXLAN Network Identifier (VNI) \| Reserved \|
	17	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	18	*
	19	* I = VXLAN Network Identifier (VNI) present.
	20	*/
	21	struct vxlanhdr {
	22	__be32 vx_flags;
	23	__be32 vx_vni;
	24	};
	25
	26	/* VXLAN header flags. */
54bfd872	27	#define VXLAN_HF_VNI cpu_to_be32(BIT(27))
828788ac JB	28
	29	#define VXLAN_N_VID (1u << 24)
	30	#define VXLAN_VID_MASK (VXLAN_N_VID - 1)
54bfd872	31	#define VXLAN_VNI_MASK cpu_to_be32(VXLAN_VID_MASK << 8)
828788ac JB	32	#define VXLAN_HLEN (sizeof(struct udphdr) + sizeof(struct vxlanhdr))
	33
	34	#define VNI_HASH_BITS 10
	35	#define VNI_HASH_SIZE (1<<VNI_HASH_BITS)
	36	#define FDB_HASH_BITS 8
	37	#define FDB_HASH_SIZE (1<<FDB_HASH_BITS)
	38
	39	/* Remote checksum offload for VXLAN (VXLAN_F_REMCSUM_[RT]X):
	40	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	41	* \|R\|R\|R\|R\|I\|R\|R\|R\|R\|R\|C\| Reserved \|
	42	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	43	* \| VXLAN Network Identifier (VNI) \|O\| Csum start \|
	44	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	45	*
	46	* C = Remote checksum offload bit. When set indicates that the
	47	* remote checksum offload data is present.
	48	*
	49	* O = Offset bit. Indicates the checksum offset relative to
	50	* checksum start.
	51	*
	52	* Csum start = Checksum start divided by two.
	53	*
	54	* http://tools.ietf.org/html/draft-herbert-vxlan-rco
	55	*/
	56
	57	/* VXLAN-RCO header flags. */
54bfd872	58	#define VXLAN_HF_RCO cpu_to_be32(BIT(21))
828788ac JB	59
828788ac JB	60	/* Remote checksum offload header option */
54bfd872 JB	61	#define VXLAN_RCO_MASK cpu_to_be32(0x7f) /* Last byte of vni field */
	62	#define VXLAN_RCO_UDP cpu_to_be32(0x80) /* Indicate UDP RCO (TCP when not set ) /
	63	#define VXLAN_RCO_SHIFT 1 /* Left shift of start */
828788ac	64	#define VXLAN_RCO_SHIFT_MASK ((1 << VXLAN_RCO_SHIFT) - 1)
54bfd872	65	#define VXLAN_MAX_REMCSUM_START (0x7f << VXLAN_RCO_SHIFT)
828788ac	66
3511494c	67	/*
828788ac	68	* VXLAN Group Based Policy Extension (VXLAN_F_GBP):
3511494c	69	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
828788ac	70	* \|G\|R\|R\|R\|I\|R\|R\|R\|R\|D\|R\|R\|A\|R\|R\|R\| Group Policy ID \|
3511494c TG	71	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	72	* \| VXLAN Network Identifier (VNI) \| Reserved \|
	73	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	74	*
828788ac JB	75	* G = Group Policy ID present.
828788ac JB	76	*
3511494c TG	77	* D = Don't Learn bit. When set, this bit indicates that the egress
	78	* VTEP MUST NOT learn the source address of the encapsulated frame.
	79	*
	80	* A = Indicates that the group policy has already been applied to
	81	* this packet. Policies MUST NOT be applied by devices when the
	82	* A bit is set.
	83	*
828788ac	84	* https://tools.ietf.org/html/draft-smith-vxlan-group-policy
3511494c TG	85	*/
3511494c TG	86	struct vxlanhdr_gbp {
0e715d6f	87	u8 vx_flags;
3511494c	88	#ifdef __LITTLE_ENDIAN_BITFIELD
0e715d6f	89	u8 reserved_flags1:3,
3511494c TG	90	policy_applied:1,
	91	reserved_flags2:2,
	92	dont_learn:1,
	93	reserved_flags3:1;
	94	#elif defined(__BIG_ENDIAN_BITFIELD)
0e715d6f	95	u8 reserved_flags1:1,
3511494c TG	96	dont_learn:1,
	97	reserved_flags2:2,
	98	policy_applied:1,
	99	reserved_flags3:3;
	100	#else
	101	#error "Please fix <asm/byteorder.h>"
	102	#endif
	103	__be16 policy_id;
	104	__be32 vx_vni;
	105	};
	106
828788ac	107	/* VXLAN-GBP header flags. */
54bfd872	108	#define VXLAN_HF_GBP cpu_to_be32(BIT(31))
828788ac	109
54bfd872	110	#define VXLAN_GBP_USED_BITS (VXLAN_HF_GBP \| cpu_to_be32(0xFFFFFF))
3511494c TG	111
	112	/* skb->mark mapping
	113	*
	114	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	115	* \|R\|R\|R\|R\|R\|R\|R\|R\|R\|D\|R\|R\|A\|R\|R\|R\| Group Policy ID \|
	116	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	117	*/
	118	#define VXLAN_GBP_DONT_LEARN (BIT(6) << 16)
	119	#define VXLAN_GBP_POLICY_APPLIED (BIT(3) << 16)
	120	#define VXLAN_GBP_ID_MASK (0xFFFF)
	121
3511494c	122	struct vxlan_metadata {
3511494c TG	123	u32 gbp;
	124	};
	125
012a5729 PS	126	/* per UDP socket information */
	127	struct vxlan_sock {
	128	struct hlist_node hlist;
012a5729 PS	129	struct work_struct del_work;
	130	struct socket *sock;
	131	struct rcu_head rcu;
	132	struct hlist_head vni_list[VNI_HASH_SIZE];
	133	atomic_t refcnt;
dc01e7d3	134	struct udp_offload udp_offloads;
dfd8645e	135	u32 flags;
012a5729 PS	136	};
012a5729 PS	137
0dfbdf41 TG	138	union vxlan_addr {
	139	struct sockaddr_in sin;
	140	struct sockaddr_in6 sin6;
	141	struct sockaddr sa;
	142	};
	143
	144	struct vxlan_rdst {
	145	union vxlan_addr remote_ip;
	146	__be16 remote_port;
54bfd872	147	__be32 remote_vni;
0dfbdf41 TG	148	u32 remote_ifindex;
	149	struct list_head list;
	150	struct rcu_head rcu;
0c1d70af	151	struct dst_cache dst_cache;
0dfbdf41 TG	152	};
	153
	154	struct vxlan_config {
	155	union vxlan_addr remote_ip;
	156	union vxlan_addr saddr;
54bfd872	157	__be32 vni;
0dfbdf41 TG	158	int remote_ifindex;
	159	int mtu;
	160	__be16 dst_port;
0e715d6f JB	161	u16 port_min;
	162	u16 port_max;
	163	u8 tos;
	164	u8 ttl;
e7f70af1	165	__be32 label;
0dfbdf41 TG	166	u32 flags;
	167	unsigned long age_interval;
	168	unsigned int addrmax;
	169	bool no_share;
	170	};
	171
	172	/* Pseudo network device */
	173	struct vxlan_dev {
	174	struct hlist_node hlist; /* vni hash table */
	175	struct list_head next; /* vxlan's per namespace list */
b1be00a6 JB	176	struct vxlan_sock vn4_sock; / listening socket for IPv4 */
	177	#if IS_ENABLED(CONFIG_IPV6)
	178	struct vxlan_sock vn6_sock; / listening socket for IPv6 */
	179	#endif
0dfbdf41 TG	180	struct net_device *dev;
	181	struct net net; / netns for packet i/o */
	182	struct vxlan_rdst default_dst; /* default destination */
	183	u32 flags; /* VXLAN_F_* in vxlan.h */
	184
	185	struct timer_list age_timer;
	186	spinlock_t hash_lock;
	187	unsigned int addrcnt;
58ce31cc	188	struct gro_cells gro_cells;
0dfbdf41 TG	189
	190	struct vxlan_config cfg;
	191
	192	struct hlist_head fdb_head[FDB_HASH_SIZE];
	193	};
	194
359a0ea9 TH	195	#define VXLAN_F_LEARN 0x01
	196	#define VXLAN_F_PROXY 0x02
	197	#define VXLAN_F_RSC 0x04
	198	#define VXLAN_F_L2MISS 0x08
	199	#define VXLAN_F_L3MISS 0x10
	200	#define VXLAN_F_IPV6 0x20
6ceb31ca	201	#define VXLAN_F_UDP_ZERO_CSUM_TX 0x40
359a0ea9 TH	202	#define VXLAN_F_UDP_ZERO_CSUM6_TX 0x80
359a0ea9 TH	203	#define VXLAN_F_UDP_ZERO_CSUM6_RX 0x100
dfd8645e TH	204	#define VXLAN_F_REMCSUM_TX 0x200
dfd8645e TH	205	#define VXLAN_F_REMCSUM_RX 0x400
3511494c	206	#define VXLAN_F_GBP 0x800
0ace2ca8	207	#define VXLAN_F_REMCSUM_NOPARTIAL 0x1000
ee122c79	208	#define VXLAN_F_COLLECT_METADATA 0x2000
359a0ea9	209
d299ce14	210	/* Flags that are used in the receive path. These flags must match in
af33c1ad TH	211	* order for a socket to be shareable
	212	*/
	213	#define VXLAN_F_RCV_FLAGS (VXLAN_F_GBP \| \
	214	VXLAN_F_UDP_ZERO_CSUM6_RX \| \
0ace2ca8	215	VXLAN_F_REMCSUM_RX \| \
ee122c79	216	VXLAN_F_REMCSUM_NOPARTIAL \| \
da8b43c0	217	VXLAN_F_COLLECT_METADATA)
ac5132d1	218
0dfbdf41 TG	219	struct net_device vxlan_dev_create(struct net net, const char *name,
	220	u8 name_assign_type, struct vxlan_config *conf);
	221
b1be00a6 JB	222	static inline __be16 vxlan_dev_dst_port(struct vxlan_dev *vxlan,
b1be00a6 JB	223	unsigned short family)
614732ea	224	{
b1be00a6 JB	225	#if IS_ENABLED(CONFIG_IPV6)
	226	if (family == AF_INET6)
	227	return inet_sk(vxlan->vn6_sock->sock->sk)->inet_sport;
	228	#endif
	229	return inet_sk(vxlan->vn4_sock->sock->sk)->inet_sport;
614732ea	230	}
49560532	231
5f35227e JG	232	static inline netdev_features_t vxlan_features_check(struct sk_buff *skb,
5f35227e JG	233	netdev_features_t features)
11bf7828	234	{
5f35227e JG	235	u8 l4_hdr = 0;
	236
	237	if (!skb->encapsulation)
	238	return features;
	239
	240	switch (vlan_get_protocol(skb)) {
	241	case htons(ETH_P_IP):
	242	l4_hdr = ip_hdr(skb)->protocol;
	243	break;
	244	case htons(ETH_P_IPV6):
	245	l4_hdr = ipv6_hdr(skb)->nexthdr;
	246	break;
	247	default:
	248	return features;;
	249	}
	250
	251	if ((l4_hdr == IPPROTO_UDP) &&
11bf7828 JS	252	(skb->inner_protocol_type != ENCAP_TYPE_ETHER \|\|
	253	skb->inner_protocol != htons(ETH_P_TEB) \|\|
	254	(skb_inner_mac_header(skb) - skb_transport_header(skb) !=
af67eb9e AD	255	sizeof(struct udphdr) + sizeof(struct vxlanhdr)) \|\|
	256	(skb->ip_summed != CHECKSUM_NONE &&
	257	!can_checksum_protocol(features, inner_eth_hdr(skb)->h_proto))))
a188222b	258	return features & ~(NETIF_F_CSUM_MASK \| NETIF_F_GSO_MASK);
11bf7828	259
5f35227e	260	return features;
11bf7828	261	}
23e62de3	262
e6cd988c JG	263	/* IP header + UDP + VXLAN + Ethernet header */
	264	#define VXLAN_HEADROOM (20 + 8 + 8 + 14)
	265	/* IPv6 header + UDP + VXLAN + Ethernet header */
	266	#define VXLAN6_HEADROOM (40 + 8 + 8 + 14)
	267
d4ac05ff JB	268	static inline struct vxlanhdr vxlan_hdr(struct sk_buff skb)
	269	{
	270	return (struct vxlanhdr *)(udp_hdr(skb) + 1);
	271	}
	272
54bfd872 JB	273	static inline __be32 vxlan_vni(__be32 vni_field)
	274	{
	275	#if defined(__BIG_ENDIAN)
5692d7ea	276	return (__force __be32)((__force u32)vni_field >> 8);
54bfd872	277	#else
5692d7ea	278	return (__force __be32)((__force u32)(vni_field & VXLAN_VNI_MASK) << 8);
54bfd872 JB	279	#endif
	280	}
	281
	282	static inline __be32 vxlan_vni_field(__be32 vni)
	283	{
	284	#if defined(__BIG_ENDIAN)
5692d7ea	285	return (__force __be32)((__force u32)vni << 8);
54bfd872	286	#else
5692d7ea	287	return (__force __be32)((__force u32)vni >> 8);
54bfd872 JB	288	#endif
	289	}
	290
	291	static inline __be32 vxlan_tun_id_to_vni(__be64 tun_id)
	292	{
	293	#if defined(__BIG_ENDIAN)
5692d7ea	294	return (__force __be32)tun_id;
54bfd872	295	#else
5692d7ea	296	return (__force __be32)((__force u64)tun_id >> 32);
54bfd872 JB	297	#endif
	298	}
	299
07dabf20 JB	300	static inline __be64 vxlan_vni_to_tun_id(__be32 vni)
	301	{
	302	#if defined(__BIG_ENDIAN)
5692d7ea	303	return (__force __be64)vni;
07dabf20	304	#else
5692d7ea	305	return (__force __be64)((u64)(__force u32)vni << 32);
07dabf20 JB	306	#endif
	307	}
	308
54bfd872 JB	309	static inline size_t vxlan_rco_start(__be32 vni_field)
	310	{
	311	return be32_to_cpu(vni_field & VXLAN_RCO_MASK) << VXLAN_RCO_SHIFT;
	312	}
	313
	314	static inline size_t vxlan_rco_offset(__be32 vni_field)
	315	{
	316	return (vni_field & VXLAN_RCO_UDP) ?
	317	offsetof(struct udphdr, check) :
	318	offsetof(struct tcphdr, check);
	319	}
	320
	321	static inline __be32 vxlan_compute_rco(unsigned int start, unsigned int offset)
	322	{
	323	__be32 vni_field = cpu_to_be32(start >> VXLAN_RCO_SHIFT);
	324
	325	if (offset == offsetof(struct udphdr, check))
	326	vni_field \|= VXLAN_RCO_UDP;
	327	return vni_field;
	328	}
	329
e6cd988c	330	#if IS_ENABLED(CONFIG_VXLAN)
53cf5275	331	void vxlan_get_rx_port(struct net_device *netdev);
e6cd988c JG	332	#else
	333	static inline void vxlan_get_rx_port(struct net_device *netdev)
	334	{
	335	}
	336	#endif
705cc62f JB	337
	338	static inline unsigned short vxlan_get_sk_family(struct vxlan_sock *vs)
	339	{
	340	return vs->sock->sk->sk_family;
	341	}
48e92c44 JB	342
48e92c44 JB	343	#endif