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

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __NET_VXLAN_H
#define __NET_VXLAN_H 1

#include <linux/if_vlan.h>
#include <linux/rhashtable-types.h>
#include <net/udp_tunnel.h>
#include <net/dst_metadata.h>
#include <net/rtnetlink.h>
#include <net/switchdev.h>
#include <net/nexthop.h>

#define IANA_VXLAN_UDP_PORT     4789
#define IANA_VXLAN_GPE_UDP_PORT 4790

/* 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)

#define VXLAN_GBP_MASK (VXLAN_GBP_DONT_LEARN | VXLAN_GBP_POLICY_APPLIED | \
			VXLAN_GBP_ID_MASK)

/*
 * VXLAN Generic Protocol Extension (VXLAN_F_GPE):
 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 * |R|R|Ver|I|P|R|O|       Reserved                |Next Protocol  |
 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 * |                VXLAN Network Identifier (VNI) |   Reserved    |
 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 *
 * Ver = Version. Indicates VXLAN GPE protocol version.
 *
 * P = Next Protocol Bit. The P bit is set to indicate that the
 *     Next Protocol field is present.
 *
 * O = OAM Flag Bit. The O bit is set to indicate that the packet
 *     is an OAM packet.
 *
 * Next Protocol = This 8 bit field indicates the protocol header
 * immediately following the VXLAN GPE header.
 *
 * https://tools.ietf.org/html/draft-ietf-nvo3-vxlan-gpe-01
 */

struct vxlanhdr_gpe {
#if defined(__LITTLE_ENDIAN_BITFIELD)
	u8	oam_flag:1,
		reserved_flags1:1,
		np_applied:1,
		instance_applied:1,
		version:2,
		reserved_flags2:2;
#elif defined(__BIG_ENDIAN_BITFIELD)
	u8	reserved_flags2:2,
		version:2,
		instance_applied:1,
		np_applied:1,
		reserved_flags1:1,
		oam_flag:1;
#endif
	u8	reserved_flags3;
	u8	reserved_flags4;
	u8	next_protocol;
	__be32	vx_vni;
};

/* VXLAN-GPE header flags. */
#define VXLAN_HF_VER	cpu_to_be32(BIT(29) | BIT(28))
#define VXLAN_HF_NP	cpu_to_be32(BIT(26))
#define VXLAN_HF_OAM	cpu_to_be32(BIT(24))

#define VXLAN_GPE_USED_BITS (VXLAN_HF_VER | VXLAN_HF_NP | VXLAN_HF_OAM | \
			     cpu_to_be32(0xff))

struct vxlan_metadata {
	u32		gbp;
};

/* per UDP socket information */
struct vxlan_sock {
	struct hlist_node hlist;
	struct socket	 *sock;
	struct hlist_head vni_list[VNI_HASH_SIZE];
	refcount_t	  refcnt;
	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;
	u8			 offloaded:1;
	__be32			 remote_vni;
	u32			 remote_ifindex;
	struct net_device	 *remote_dev;
	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;
	enum ifla_vxlan_label_policy	label_policy;
	u32				flags;
	unsigned long			age_interval;
	unsigned int			addrmax;
	bool				no_share;
	enum ifla_vxlan_df		df;
	struct vxlanhdr			reserved_bits;
};

enum {
	VXLAN_VNI_STATS_RX,
	VXLAN_VNI_STATS_RX_DROPS,
	VXLAN_VNI_STATS_RX_ERRORS,
	VXLAN_VNI_STATS_TX,
	VXLAN_VNI_STATS_TX_DROPS,
	VXLAN_VNI_STATS_TX_ERRORS,
};

struct vxlan_vni_stats {
	u64 rx_packets;
	u64 rx_bytes;
	u64 rx_drops;
	u64 rx_errors;
	u64 tx_packets;
	u64 tx_bytes;
	u64 tx_drops;
	u64 tx_errors;
};

struct vxlan_vni_stats_pcpu {
	struct vxlan_vni_stats stats;
	struct u64_stats_sync syncp;
};

struct vxlan_dev_node {
	struct hlist_node hlist;
	struct vxlan_dev *vxlan;
};

struct vxlan_vni_node {
	struct rhash_head vnode;
	struct vxlan_dev_node hlist4; /* vni hash table for IPv4 socket */
#if IS_ENABLED(CONFIG_IPV6)
	struct vxlan_dev_node hlist6; /* vni hash table for IPv6 socket */
#endif
	struct list_head vlist;
	__be32 vni;
	union vxlan_addr remote_ip; /* default remote ip for this vni */
	struct vxlan_vni_stats_pcpu __percpu *stats;

	struct rcu_head rcu;
};

struct vxlan_vni_group {
	struct rhashtable	vni_hash;
	struct list_head	vni_list;
	u32			num_vnis;
};

/* Pseudo network device */
struct vxlan_dev {
	struct vxlan_dev_node hlist4;	/* vni hash table for IPv4 socket */
#if IS_ENABLED(CONFIG_IPV6)
	struct vxlan_dev_node hlist6;	/* vni hash table for IPv6 socket */
#endif
	struct list_head  next;		/* vxlan's per namespace list */
	struct vxlan_sock __rcu *vn4_sock;	/* listening socket for IPv4 */
#if IS_ENABLED(CONFIG_IPV6)
	struct vxlan_sock __rcu *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 */

	struct timer_list age_timer;
	spinlock_t	  hash_lock[FDB_HASH_SIZE];
	unsigned int	  addrcnt;
	struct gro_cells  gro_cells;

	struct vxlan_config	cfg;

	struct vxlan_vni_group  __rcu *vnigrp;

	struct hlist_head fdb_head[FDB_HASH_SIZE];

	struct rhashtable mdb_tbl;
	struct hlist_head mdb_list;
	unsigned int mdb_seq;
};

#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
#define VXLAN_F_GPE			0x4000
#define VXLAN_F_IPV6_LINKLOCAL		0x8000
#define VXLAN_F_TTL_INHERIT		0x10000
#define VXLAN_F_VNIFILTER               0x20000
#define VXLAN_F_MDB			0x40000
#define VXLAN_F_LOCALBYPASS		0x80000

/* 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_GPE |			\
					 VXLAN_F_UDP_ZERO_CSUM6_RX |	\
					 VXLAN_F_REMCSUM_RX |		\
					 VXLAN_F_REMCSUM_NOPARTIAL |	\
					 VXLAN_F_COLLECT_METADATA |	\
					 VXLAN_F_VNIFILTER)

/* Flags that can be set together with VXLAN_F_GPE. */
#define VXLAN_F_ALLOWED_GPE		(VXLAN_F_GPE |			\
					 VXLAN_F_IPV6 |			\
					 VXLAN_F_IPV6_LINKLOCAL |	\
					 VXLAN_F_UDP_ZERO_CSUM_TX |	\
					 VXLAN_F_UDP_ZERO_CSUM6_TX |	\
					 VXLAN_F_UDP_ZERO_CSUM6_RX |	\
					 VXLAN_F_COLLECT_METADATA  |	\
					 VXLAN_F_VNIFILTER         |    \
					 VXLAN_F_LOCALBYPASS)

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

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;
}

static inline int vxlan_headroom(u32 flags)
{
	/* VXLAN:     IP4/6 header + UDP + VXLAN + Ethernet header */
	/* VXLAN-GPE: IP4/6 header + UDP + VXLAN */
	return (flags & VXLAN_F_IPV6 ? sizeof(struct ipv6hdr) :
				       sizeof(struct iphdr)) +
	       sizeof(struct udphdr) + sizeof(struct vxlanhdr) +
	       (flags & VXLAN_F_GPE ? 0 : ETH_HLEN);
}

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 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;
}

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

#if IS_ENABLED(CONFIG_IPV6)

static inline bool vxlan_addr_any(const union vxlan_addr *ipa)
{
	if (ipa->sa.sa_family == AF_INET6)
		return ipv6_addr_any(&ipa->sin6.sin6_addr);
	else
		return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY);
}

static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa)
{
	if (ipa->sa.sa_family == AF_INET6)
		return ipv6_addr_is_multicast(&ipa->sin6.sin6_addr);
	else
		return ipv4_is_multicast(ipa->sin.sin_addr.s_addr);
}

#else /* !IS_ENABLED(CONFIG_IPV6) */

static inline bool vxlan_addr_any(const union vxlan_addr *ipa)
{
	return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY);
}

static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa)
{
	return ipv4_is_multicast(ipa->sin.sin_addr.s_addr);
}

#endif /* IS_ENABLED(CONFIG_IPV6) */

static inline bool netif_is_vxlan(const struct net_device *dev)
{
	return dev->rtnl_link_ops &&
	       !strcmp(dev->rtnl_link_ops->kind, "vxlan");
}

struct switchdev_notifier_vxlan_fdb_info {
	struct switchdev_notifier_info info; /* must be first */
	union vxlan_addr remote_ip;
	__be16 remote_port;
	__be32 remote_vni;
	u32 remote_ifindex;
	u8 eth_addr[ETH_ALEN];
	__be32 vni;
	bool offloaded;
	bool added_by_user;
};

#if IS_ENABLED(CONFIG_VXLAN)
int vxlan_fdb_find_uc(struct net_device *dev, const u8 *mac, __be32 vni,
		      struct switchdev_notifier_vxlan_fdb_info *fdb_info);
int vxlan_fdb_replay(const struct net_device *dev, __be32 vni,
		     struct notifier_block *nb,
		     struct netlink_ext_ack *extack);
void vxlan_fdb_clear_offload(const struct net_device *dev, __be32 vni);

#else
static inline int
vxlan_fdb_find_uc(struct net_device *dev, const u8 *mac, __be32 vni,
		  struct switchdev_notifier_vxlan_fdb_info *fdb_info)
{
	return -ENOENT;
}

static inline int vxlan_fdb_replay(const struct net_device *dev, __be32 vni,
				   struct notifier_block *nb,
				   struct netlink_ext_ack *extack)
{
	return -EOPNOTSUPP;
}

static inline void
vxlan_fdb_clear_offload(const struct net_device *dev, __be32 vni)
{
}
#endif

static inline void vxlan_flag_attr_error(int attrtype,
					 struct netlink_ext_ack *extack)
{
#define VXLAN_FLAG(flg) \
	case IFLA_VXLAN_##flg: \
		NL_SET_ERR_MSG_MOD(extack, \
				   "cannot change " #flg " flag"); \
		break
	switch (attrtype) {
	VXLAN_FLAG(TTL_INHERIT);
	VXLAN_FLAG(LEARNING);
	VXLAN_FLAG(PROXY);
	VXLAN_FLAG(RSC);
	VXLAN_FLAG(L2MISS);
	VXLAN_FLAG(L3MISS);
	VXLAN_FLAG(COLLECT_METADATA);
	VXLAN_FLAG(UDP_ZERO_CSUM6_TX);
	VXLAN_FLAG(UDP_ZERO_CSUM6_RX);
	VXLAN_FLAG(REMCSUM_TX);
	VXLAN_FLAG(REMCSUM_RX);
	VXLAN_FLAG(GBP);
	VXLAN_FLAG(GPE);
	VXLAN_FLAG(REMCSUM_NOPARTIAL);
	default:
		NL_SET_ERR_MSG_MOD(extack, \
				   "cannot change flag");
		break;
	}
#undef VXLAN_FLAG
}

static inline bool vxlan_fdb_nh_path_select(struct nexthop *nh,
					    u32 hash,
					    struct vxlan_rdst *rdst)
{
	struct fib_nh_common *nhc;

	nhc = nexthop_path_fdb_result(nh, hash >> 1);
	if (unlikely(!nhc))
		return false;

	switch (nhc->nhc_gw_family) {
	case AF_INET:
		rdst->remote_ip.sin.sin_addr.s_addr = nhc->nhc_gw.ipv4;
		rdst->remote_ip.sa.sa_family = AF_INET;
		break;
	case AF_INET6:
		rdst->remote_ip.sin6.sin6_addr = nhc->nhc_gw.ipv6;
		rdst->remote_ip.sa.sa_family = AF_INET6;
		break;
	}

	return true;
}

static inline void vxlan_build_gbp_hdr(struct vxlanhdr *vxh, const struct vxlan_metadata *md)
{
	struct vxlanhdr_gbp *gbp;

	if (!md->gbp)
		return;

	gbp = (struct vxlanhdr_gbp *)vxh;
	vxh->vx_flags |= VXLAN_HF_GBP;

	if (md->gbp & VXLAN_GBP_DONT_LEARN)
		gbp->dont_learn = 1;

	if (md->gbp & VXLAN_GBP_POLICY_APPLIED)
		gbp->policy_applied = 1;

	gbp->policy_id = htons(md->gbp & VXLAN_GBP_ID_MASK);
}

#endif
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
012a5729 PS	2	#ifndef __NET_VXLAN_H
	3	#define __NET_VXLAN_H 1
	4
5f35227e	5	#include <linux/if_vlan.h>
a3a48de5	6	#include <linux/rhashtable-types.h>
86a98057	7	#include <net/udp_tunnel.h>
ee122c79	8	#include <net/dst_metadata.h>
5ff4ff4f	9	#include <net/rtnetlink.h>
9a997353	10	#include <net/switchdev.h>
1274e1cc	11	#include <net/nexthop.h>
012a5729	12
bea96410	13	#define IANA_VXLAN_UDP_PORT 4789
ed618bd8	14	#define IANA_VXLAN_GPE_UDP_PORT 4790
bea96410	15
828788ac JB	16	/* VXLAN protocol (RFC 7348) header:
	17	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	18	* \|R\|R\|R\|R\|I\|R\|R\|R\| Reserved \|
	19	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	20	* \| VXLAN Network Identifier (VNI) \| Reserved \|
	21	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	22	*
	23	* I = VXLAN Network Identifier (VNI) present.
	24	*/
	25	struct vxlanhdr {
	26	__be32 vx_flags;
	27	__be32 vx_vni;
	28	};
	29
	30	/* VXLAN header flags. */
54bfd872	31	#define VXLAN_HF_VNI cpu_to_be32(BIT(27))
828788ac JB	32
	33	#define VXLAN_N_VID (1u << 24)
	34	#define VXLAN_VID_MASK (VXLAN_N_VID - 1)
54bfd872	35	#define VXLAN_VNI_MASK cpu_to_be32(VXLAN_VID_MASK << 8)
828788ac JB	36	#define VXLAN_HLEN (sizeof(struct udphdr) + sizeof(struct vxlanhdr))
	37
	38	#define VNI_HASH_BITS 10
	39	#define VNI_HASH_SIZE (1<<VNI_HASH_BITS)
	40	#define FDB_HASH_BITS 8
	41	#define FDB_HASH_SIZE (1<<FDB_HASH_BITS)
	42
	43	/* Remote checksum offload for VXLAN (VXLAN_F_REMCSUM_[RT]X):
	44	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	45	* \|R\|R\|R\|R\|I\|R\|R\|R\|R\|R\|C\| Reserved \|
	46	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	47	* \| VXLAN Network Identifier (VNI) \|O\| Csum start \|
	48	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	49	*
	50	* C = Remote checksum offload bit. When set indicates that the
	51	* remote checksum offload data is present.
	52	*
	53	* O = Offset bit. Indicates the checksum offset relative to
	54	* checksum start.
	55	*
	56	* Csum start = Checksum start divided by two.
	57	*
	58	* http://tools.ietf.org/html/draft-herbert-vxlan-rco
	59	*/
	60
	61	/* VXLAN-RCO header flags. */
54bfd872	62	#define VXLAN_HF_RCO cpu_to_be32(BIT(21))
828788ac JB	63
828788ac JB	64	/* Remote checksum offload header option */
54bfd872 JB	65	#define VXLAN_RCO_MASK cpu_to_be32(0x7f) /* Last byte of vni field */
	66	#define VXLAN_RCO_UDP cpu_to_be32(0x80) /* Indicate UDP RCO (TCP when not set ) /
	67	#define VXLAN_RCO_SHIFT 1 /* Left shift of start */
828788ac	68	#define VXLAN_RCO_SHIFT_MASK ((1 << VXLAN_RCO_SHIFT) - 1)
54bfd872	69	#define VXLAN_MAX_REMCSUM_START (0x7f << VXLAN_RCO_SHIFT)
828788ac	70
3511494c	71	/*
828788ac	72	* VXLAN Group Based Policy Extension (VXLAN_F_GBP):
3511494c	73	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
828788ac	74	* \|G\|R\|R\|R\|I\|R\|R\|R\|R\|D\|R\|R\|A\|R\|R\|R\| Group Policy ID \|
3511494c TG	75	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	76	* \| VXLAN Network Identifier (VNI) \| Reserved \|
	77	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	78	*
828788ac JB	79	* G = Group Policy ID present.
828788ac JB	80	*
3511494c TG	81	* D = Don't Learn bit. When set, this bit indicates that the egress
	82	* VTEP MUST NOT learn the source address of the encapsulated frame.
	83	*
	84	* A = Indicates that the group policy has already been applied to
	85	* this packet. Policies MUST NOT be applied by devices when the
	86	* A bit is set.
	87	*
828788ac	88	* https://tools.ietf.org/html/draft-smith-vxlan-group-policy
3511494c TG	89	*/
3511494c TG	90	struct vxlanhdr_gbp {
0e715d6f	91	u8 vx_flags;
3511494c	92	#ifdef __LITTLE_ENDIAN_BITFIELD
0e715d6f	93	u8 reserved_flags1:3,
3511494c TG	94	policy_applied:1,
	95	reserved_flags2:2,
	96	dont_learn:1,
	97	reserved_flags3:1;
	98	#elif defined(__BIG_ENDIAN_BITFIELD)
0e715d6f	99	u8 reserved_flags1:1,
3511494c TG	100	dont_learn:1,
	101	reserved_flags2:2,
	102	policy_applied:1,
	103	reserved_flags3:3;
	104	#else
	105	#error "Please fix <asm/byteorder.h>"
	106	#endif
	107	__be16 policy_id;
	108	__be32 vx_vni;
	109	};
	110
828788ac	111	/* VXLAN-GBP header flags. */
54bfd872	112	#define VXLAN_HF_GBP cpu_to_be32(BIT(31))
828788ac	113
54bfd872	114	#define VXLAN_GBP_USED_BITS (VXLAN_HF_GBP \| cpu_to_be32(0xFFFFFF))
3511494c TG	115
	116	/* skb->mark mapping
	117	*
	118	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	119	* \|R\|R\|R\|R\|R\|R\|R\|R\|R\|D\|R\|R\|A\|R\|R\|R\| Group Policy ID \|
	120	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	121	*/
	122	#define VXLAN_GBP_DONT_LEARN (BIT(6) << 16)
	123	#define VXLAN_GBP_POLICY_APPLIED (BIT(3) << 16)
	124	#define VXLAN_GBP_ID_MASK (0xFFFF)
	125
13e6ce98 XL	126	#define VXLAN_GBP_MASK (VXLAN_GBP_DONT_LEARN \| VXLAN_GBP_POLICY_APPLIED \| \
	127	VXLAN_GBP_ID_MASK)
	128
e1e5314d JB	129	/*
	130	* VXLAN Generic Protocol Extension (VXLAN_F_GPE):
	131	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	132	* \|R\|R\|Ver\|I\|P\|R\|O\| Reserved \|Next Protocol \|
	133	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	134	* \| VXLAN Network Identifier (VNI) \| Reserved \|
	135	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	136	*
	137	* Ver = Version. Indicates VXLAN GPE protocol version.
	138	*
	139	* P = Next Protocol Bit. The P bit is set to indicate that the
	140	* Next Protocol field is present.
	141	*
	142	* O = OAM Flag Bit. The O bit is set to indicate that the packet
	143	* is an OAM packet.
	144	*
	145	* Next Protocol = This 8 bit field indicates the protocol header
	146	* immediately following the VXLAN GPE header.
	147	*
	148	* https://tools.ietf.org/html/draft-ietf-nvo3-vxlan-gpe-01
	149	*/
	150
	151	struct vxlanhdr_gpe {
	152	#if defined(__LITTLE_ENDIAN_BITFIELD)
	153	u8 oam_flag:1,
	154	reserved_flags1:1,
	155	np_applied:1,
	156	instance_applied:1,
	157	version:2,
f1c8d372	158	reserved_flags2:2;
e1e5314d JB	159	#elif defined(__BIG_ENDIAN_BITFIELD)
	160	u8 reserved_flags2:2,
	161	version:2,
	162	instance_applied:1,
	163	np_applied:1,
	164	reserved_flags1:1,
	165	oam_flag:1;
	166	#endif
	167	u8 reserved_flags3;
	168	u8 reserved_flags4;
	169	u8 next_protocol;
	170	__be32 vx_vni;
	171	};
	172
	173	/* VXLAN-GPE header flags. */
	174	#define VXLAN_HF_VER cpu_to_be32(BIT(29) \| BIT(28))
	175	#define VXLAN_HF_NP cpu_to_be32(BIT(26))
	176	#define VXLAN_HF_OAM cpu_to_be32(BIT(24))
	177
	178	#define VXLAN_GPE_USED_BITS (VXLAN_HF_VER \| VXLAN_HF_NP \| VXLAN_HF_OAM \| \
	179	cpu_to_be32(0xff))
	180
3511494c	181	struct vxlan_metadata {
3511494c TG	182	u32 gbp;
	183	};
	184
012a5729 PS	185	/* per UDP socket information */
	186	struct vxlan_sock {
	187	struct hlist_node hlist;
012a5729	188	struct socket *sock;
012a5729	189	struct hlist_head vni_list[VNI_HASH_SIZE];
66af846f	190	refcount_t refcnt;
dfd8645e	191	u32 flags;
012a5729 PS	192	};
012a5729 PS	193
0dfbdf41 TG	194	union vxlan_addr {
	195	struct sockaddr_in sin;
	196	struct sockaddr_in6 sin6;
	197	struct sockaddr sa;
	198	};
	199
	200	struct vxlan_rdst {
	201	union vxlan_addr remote_ip;
	202	__be16 remote_port;
0efe1173	203	u8 offloaded:1;
54bfd872	204	__be32 remote_vni;
0dfbdf41	205	u32 remote_ifindex;
0ce1822c	206	struct net_device *remote_dev;
0dfbdf41 TG	207	struct list_head list;
0dfbdf41 TG	208	struct rcu_head rcu;
0c1d70af	209	struct dst_cache dst_cache;
0dfbdf41 TG	210	};
	211
	212	struct vxlan_config {
c6e9dba3 AL	213	union vxlan_addr remote_ip;
	214	union vxlan_addr saddr;
	215	__be32 vni;
	216	int remote_ifindex;
	217	int mtu;
	218	__be16 dst_port;
	219	u16 port_min;
	220	u16 port_max;
	221	u8 tos;
	222	u8 ttl;
	223	__be32 label;
	224	enum ifla_vxlan_label_policy label_policy;
	225	u32 flags;
	226	unsigned long age_interval;
	227	unsigned int addrmax;
	228	bool no_share;
	229	enum ifla_vxlan_df df;
e4f86477	230	struct vxlanhdr reserved_bits;
0dfbdf41 TG	231	};
0dfbdf41 TG	232
4095e0e1 NA	233	enum {
	234	VXLAN_VNI_STATS_RX,
	235	VXLAN_VNI_STATS_RX_DROPS,
	236	VXLAN_VNI_STATS_RX_ERRORS,
	237	VXLAN_VNI_STATS_TX,
	238	VXLAN_VNI_STATS_TX_DROPS,
	239	VXLAN_VNI_STATS_TX_ERRORS,
	240	};
	241
	242	struct vxlan_vni_stats {
	243	u64 rx_packets;
	244	u64 rx_bytes;
	245	u64 rx_drops;
	246	u64 rx_errors;
	247	u64 tx_packets;
	248	u64 tx_bytes;
	249	u64 tx_drops;
	250	u64 tx_errors;
	251	};
	252
	253	struct vxlan_vni_stats_pcpu {
	254	struct vxlan_vni_stats stats;
	255	struct u64_stats_sync syncp;
	256	};
	257
69e76661 JB	258	struct vxlan_dev_node {
	259	struct hlist_node hlist;
	260	struct vxlan_dev *vxlan;
	261	};
	262
f9c4bb0b RP	263	struct vxlan_vni_node {
	264	struct rhash_head vnode;
	265	struct vxlan_dev_node hlist4; /* vni hash table for IPv4 socket */
	266	#if IS_ENABLED(CONFIG_IPV6)
	267	struct vxlan_dev_node hlist6; /* vni hash table for IPv6 socket */
	268	#endif
	269	struct list_head vlist;
	270	__be32 vni;
	271	union vxlan_addr remote_ip; /* default remote ip for this vni */
4095e0e1	272	struct vxlan_vni_stats_pcpu __percpu *stats;
f9c4bb0b RP	273
	274	struct rcu_head rcu;
	275	};
	276
	277	struct vxlan_vni_group {
	278	struct rhashtable vni_hash;
	279	struct list_head vni_list;
	280	u32 num_vnis;
	281	};
	282
0dfbdf41 TG	283	/* Pseudo network device */
0dfbdf41 TG	284	struct vxlan_dev {
69e76661 JB	285	struct vxlan_dev_node hlist4; /* vni hash table for IPv4 socket */
	286	#if IS_ENABLED(CONFIG_IPV6)
	287	struct vxlan_dev_node hlist6; /* vni hash table for IPv6 socket */
	288	#endif
0dfbdf41	289	struct list_head next; /* vxlan's per namespace list */
c6fcc4fc	290	struct vxlan_sock __rcu vn4_sock; / listening socket for IPv4 */
b1be00a6	291	#if IS_ENABLED(CONFIG_IPV6)
c6fcc4fc	292	struct vxlan_sock __rcu vn6_sock; / listening socket for IPv6 */
b1be00a6	293	#endif
0dfbdf41 TG	294	struct net_device *dev;
	295	struct net net; / netns for packet i/o */
	296	struct vxlan_rdst default_dst; /* default destination */
0dfbdf41 TG	297
0dfbdf41 TG	298	struct timer_list age_timer;
fe1e0713	299	spinlock_t hash_lock[FDB_HASH_SIZE];
0dfbdf41	300	unsigned int addrcnt;
58ce31cc	301	struct gro_cells gro_cells;
0dfbdf41 TG	302
	303	struct vxlan_config cfg;
	304
f9c4bb0b RP	305	struct vxlan_vni_group __rcu *vnigrp;
f9c4bb0b RP	306
0dfbdf41	307	struct hlist_head fdb_head[FDB_HASH_SIZE];
a3a48de5 IS	308
	309	struct rhashtable mdb_tbl;
	310	struct hlist_head mdb_list;
	311	unsigned int mdb_seq;
0dfbdf41 TG	312	};
0dfbdf41 TG	313
359a0ea9 TH	314	#define VXLAN_F_LEARN 0x01
	315	#define VXLAN_F_PROXY 0x02
	316	#define VXLAN_F_RSC 0x04
	317	#define VXLAN_F_L2MISS 0x08
	318	#define VXLAN_F_L3MISS 0x10
	319	#define VXLAN_F_IPV6 0x20
6ceb31ca	320	#define VXLAN_F_UDP_ZERO_CSUM_TX 0x40
359a0ea9 TH	321	#define VXLAN_F_UDP_ZERO_CSUM6_TX 0x80
359a0ea9 TH	322	#define VXLAN_F_UDP_ZERO_CSUM6_RX 0x100
dfd8645e TH	323	#define VXLAN_F_REMCSUM_TX 0x200
dfd8645e TH	324	#define VXLAN_F_REMCSUM_RX 0x400
3511494c	325	#define VXLAN_F_GBP 0x800
0ace2ca8	326	#define VXLAN_F_REMCSUM_NOPARTIAL 0x1000
ee122c79	327	#define VXLAN_F_COLLECT_METADATA 0x2000
e1e5314d	328	#define VXLAN_F_GPE 0x4000
0f22a3c6	329	#define VXLAN_F_IPV6_LINKLOCAL 0x8000
72f6d71e	330	#define VXLAN_F_TTL_INHERIT 0x10000
f9c4bb0b	331	#define VXLAN_F_VNIFILTER 0x20000
bc6c6b01	332	#define VXLAN_F_MDB 0x40000
69474a8a	333	#define VXLAN_F_LOCALBYPASS 0x80000
359a0ea9	334
d299ce14	335	/* Flags that are used in the receive path. These flags must match in
af33c1ad TH	336	* order for a socket to be shareable
	337	*/
	338	#define VXLAN_F_RCV_FLAGS (VXLAN_F_GBP \| \
e1e5314d	339	VXLAN_F_GPE \| \
af33c1ad	340	VXLAN_F_UDP_ZERO_CSUM6_RX \| \
0ace2ca8	341	VXLAN_F_REMCSUM_RX \| \
ee122c79	342	VXLAN_F_REMCSUM_NOPARTIAL \| \
f9c4bb0b RP	343	VXLAN_F_COLLECT_METADATA \| \
f9c4bb0b RP	344	VXLAN_F_VNIFILTER)
ac5132d1	345
e1e5314d JB	346	/* Flags that can be set together with VXLAN_F_GPE. */
	347	#define VXLAN_F_ALLOWED_GPE (VXLAN_F_GPE \| \
	348	VXLAN_F_IPV6 \| \
0f22a3c6	349	VXLAN_F_IPV6_LINKLOCAL \| \
e1e5314d JB	350	VXLAN_F_UDP_ZERO_CSUM_TX \| \
	351	VXLAN_F_UDP_ZERO_CSUM6_TX \| \
	352	VXLAN_F_UDP_ZERO_CSUM6_RX \| \
f9c4bb0b	353	VXLAN_F_COLLECT_METADATA \| \
69474a8a VN	354	VXLAN_F_VNIFILTER \| \
69474a8a VN	355	VXLAN_F_LOCALBYPASS)
e1e5314d	356
0dfbdf41 TG	357	struct net_device vxlan_dev_create(struct net net, const char *name,
	358	u8 name_assign_type, struct vxlan_config *conf);
	359
5f35227e JG	360	static inline netdev_features_t vxlan_features_check(struct sk_buff *skb,
5f35227e JG	361	netdev_features_t features)
11bf7828	362	{
5f35227e JG	363	u8 l4_hdr = 0;
	364
	365	if (!skb->encapsulation)
	366	return features;
	367
	368	switch (vlan_get_protocol(skb)) {
	369	case htons(ETH_P_IP):
	370	l4_hdr = ip_hdr(skb)->protocol;
	371	break;
	372	case htons(ETH_P_IPV6):
	373	l4_hdr = ipv6_hdr(skb)->nexthdr;
	374	break;
	375	default:
5ef7e0ba	376	return features;
5f35227e JG	377	}
	378
	379	if ((l4_hdr == IPPROTO_UDP) &&
11bf7828 JS	380	(skb->inner_protocol_type != ENCAP_TYPE_ETHER \|\|
	381	skb->inner_protocol != htons(ETH_P_TEB) \|\|
	382	(skb_inner_mac_header(skb) - skb_transport_header(skb) !=
af67eb9e AD	383	sizeof(struct udphdr) + sizeof(struct vxlanhdr)) \|\|
	384	(skb->ip_summed != CHECKSUM_NONE &&
	385	!can_checksum_protocol(features, inner_eth_hdr(skb)->h_proto))))
a188222b	386	return features & ~(NETIF_F_CSUM_MASK \| NETIF_F_GSO_MASK);
11bf7828	387
5f35227e	388	return features;
11bf7828	389	}
23e62de3	390
94d166c5 JB	391	static inline int vxlan_headroom(u32 flags)
	392	{
	393	/* VXLAN: IP4/6 header + UDP + VXLAN + Ethernet header */
	394	/* VXLAN-GPE: IP4/6 header + UDP + VXLAN */
	395	return (flags & VXLAN_F_IPV6 ? sizeof(struct ipv6hdr) :
	396	sizeof(struct iphdr)) +
	397	sizeof(struct udphdr) + sizeof(struct vxlanhdr) +
	398	(flags & VXLAN_F_GPE ? 0 : ETH_HLEN);
	399	}
e6cd988c	400
d4ac05ff JB	401	static inline struct vxlanhdr vxlan_hdr(struct sk_buff skb)
	402	{
	403	return (struct vxlanhdr *)(udp_hdr(skb) + 1);
	404	}
	405
54bfd872 JB	406	static inline __be32 vxlan_vni(__be32 vni_field)
	407	{
	408	#if defined(__BIG_ENDIAN)
5692d7ea	409	return (__force __be32)((__force u32)vni_field >> 8);
54bfd872	410	#else
5692d7ea	411	return (__force __be32)((__force u32)(vni_field & VXLAN_VNI_MASK) << 8);
54bfd872 JB	412	#endif
	413	}
	414
	415	static inline __be32 vxlan_vni_field(__be32 vni)
	416	{
	417	#if defined(__BIG_ENDIAN)
5692d7ea	418	return (__force __be32)((__force u32)vni << 8);
54bfd872	419	#else
5692d7ea	420	return (__force __be32)((__force u32)vni >> 8);
54bfd872 JB	421	#endif
	422	}
	423
54bfd872 JB	424	static inline size_t vxlan_rco_start(__be32 vni_field)
	425	{
	426	return be32_to_cpu(vni_field & VXLAN_RCO_MASK) << VXLAN_RCO_SHIFT;
	427	}
	428
	429	static inline size_t vxlan_rco_offset(__be32 vni_field)
	430	{
	431	return (vni_field & VXLAN_RCO_UDP) ?
	432	offsetof(struct udphdr, check) :
	433	offsetof(struct tcphdr, check);
	434	}
	435
	436	static inline __be32 vxlan_compute_rco(unsigned int start, unsigned int offset)
	437	{
	438	__be32 vni_field = cpu_to_be32(start >> VXLAN_RCO_SHIFT);
	439
	440	if (offset == offsetof(struct udphdr, check))
	441	vni_field \|= VXLAN_RCO_UDP;
	442	return vni_field;
	443	}
	444
705cc62f JB	445	static inline unsigned short vxlan_get_sk_family(struct vxlan_sock *vs)
	446	{
	447	return vs->sock->sk->sk_family;
	448	}
48e92c44	449
cca45e05 IS	450	#if IS_ENABLED(CONFIG_IPV6)
	451
	452	static inline bool vxlan_addr_any(const union vxlan_addr *ipa)
	453	{
	454	if (ipa->sa.sa_family == AF_INET6)
	455	return ipv6_addr_any(&ipa->sin6.sin6_addr);
	456	else
	457	return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY);
	458	}
	459
	460	static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa)
	461	{
	462	if (ipa->sa.sa_family == AF_INET6)
	463	return ipv6_addr_is_multicast(&ipa->sin6.sin6_addr);
	464	else
842841ec	465	return ipv4_is_multicast(ipa->sin.sin_addr.s_addr);
cca45e05 IS	466	}
	467
	468	#else /* !IS_ENABLED(CONFIG_IPV6) */
	469
	470	static inline bool vxlan_addr_any(const union vxlan_addr *ipa)
	471	{
	472	return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY);
	473	}
	474
	475	static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa)
	476	{
842841ec	477	return ipv4_is_multicast(ipa->sin.sin_addr.s_addr);
cca45e05 IS	478	}
	479
	480	#endif /* IS_ENABLED(CONFIG_IPV6) */
	481
5ff4ff4f IS	482	static inline bool netif_is_vxlan(const struct net_device *dev)
	483	{
	484	return dev->rtnl_link_ops &&
	485	!strcmp(dev->rtnl_link_ops->kind, "vxlan");
	486	}
	487
9a997353 PM	488	struct switchdev_notifier_vxlan_fdb_info {
	489	struct switchdev_notifier_info info; /* must be first */
	490	union vxlan_addr remote_ip;
	491	__be16 remote_port;
	492	__be32 remote_vni;
	493	u32 remote_ifindex;
	494	u8 eth_addr[ETH_ALEN];
	495	__be32 vni;
0efe1173	496	bool offloaded;
45598c1c	497	bool added_by_user;
9a997353 PM	498	};
9a997353 PM	499
1941f1d6 PM	500	#if IS_ENABLED(CONFIG_VXLAN)
	501	int vxlan_fdb_find_uc(struct net_device dev, const u8 mac, __be32 vni,
	502	struct switchdev_notifier_vxlan_fdb_info *fdb_info);
4f89f5b5	503	int vxlan_fdb_replay(const struct net_device *dev, __be32 vni,
4c59b7d1 PM	504	struct notifier_block *nb,
4c59b7d1 PM	505	struct netlink_ext_ack *extack);
e5ff4b19	506	void vxlan_fdb_clear_offload(const struct net_device *dev, __be32 vni);
4f89f5b5	507
1941f1d6 PM	508	#else
	509	static inline int
	510	vxlan_fdb_find_uc(struct net_device dev, const u8 mac, __be32 vni,
	511	struct switchdev_notifier_vxlan_fdb_info *fdb_info)
	512	{
	513	return -ENOENT;
	514	}
4f89f5b5 PM	515
4f89f5b5 PM	516	static inline int vxlan_fdb_replay(const struct net_device *dev, __be32 vni,
4c59b7d1 PM	517	struct notifier_block *nb,
4c59b7d1 PM	518	struct netlink_ext_ack *extack)
4f89f5b5 PM	519	{
	520	return -EOPNOTSUPP;
	521	}
e5ff4b19 PM	522
	523	static inline void
	524	vxlan_fdb_clear_offload(const struct net_device *dev, __be32 vni)
	525	{
	526	}
1941f1d6 PM	527	#endif
1941f1d6 PM	528
70fb0828 RP	529	static inline void vxlan_flag_attr_error(int attrtype,
	530	struct netlink_ext_ack *extack)
	531	{
	532	#define VXLAN_FLAG(flg) \
	533	case IFLA_VXLAN_##flg: \
	534	NL_SET_ERR_MSG_MOD(extack, \
	535	"cannot change " #flg " flag"); \
	536	break
	537	switch (attrtype) {
	538	VXLAN_FLAG(TTL_INHERIT);
	539	VXLAN_FLAG(LEARNING);
	540	VXLAN_FLAG(PROXY);
	541	VXLAN_FLAG(RSC);
	542	VXLAN_FLAG(L2MISS);
	543	VXLAN_FLAG(L3MISS);
	544	VXLAN_FLAG(COLLECT_METADATA);
	545	VXLAN_FLAG(UDP_ZERO_CSUM6_TX);
	546	VXLAN_FLAG(UDP_ZERO_CSUM6_RX);
	547	VXLAN_FLAG(REMCSUM_TX);
	548	VXLAN_FLAG(REMCSUM_RX);
	549	VXLAN_FLAG(GBP);
	550	VXLAN_FLAG(GPE);
	551	VXLAN_FLAG(REMCSUM_NOPARTIAL);
	552	default:
	553	NL_SET_ERR_MSG_MOD(extack, \
	554	"cannot change flag");
	555	break;
	556	}
	557	#undef VXLAN_FLAG
	558	}
	559
1274e1cc	560	static inline bool vxlan_fdb_nh_path_select(struct nexthop *nh,
0756384f	561	u32 hash,
1274e1cc RP	562	struct vxlan_rdst *rdst)
	563	{
	564	struct fib_nh_common *nhc;
	565
0756384f	566	nhc = nexthop_path_fdb_result(nh, hash >> 1);
1274e1cc RP	567	if (unlikely(!nhc))
	568	return false;
	569
	570	switch (nhc->nhc_gw_family) {
	571	case AF_INET:
	572	rdst->remote_ip.sin.sin_addr.s_addr = nhc->nhc_gw.ipv4;
	573	rdst->remote_ip.sa.sa_family = AF_INET;
	574	break;
	575	case AF_INET6:
	576	rdst->remote_ip.sin6.sin6_addr = nhc->nhc_gw.ipv6;
	577	rdst->remote_ip.sa.sa_family = AF_INET6;
	578	break;
	579	}
	580
	581	return true;
	582	}
	583
c641e927 GL	584	static inline void vxlan_build_gbp_hdr(struct vxlanhdr vxh, const struct vxlan_metadata md)
	585	{
	586	struct vxlanhdr_gbp *gbp;
	587
	588	if (!md->gbp)
	589	return;
	590
	591	gbp = (struct vxlanhdr_gbp *)vxh;
	592	vxh->vx_flags \|= VXLAN_HF_GBP;
	593
	594	if (md->gbp & VXLAN_GBP_DONT_LEARN)
	595	gbp->dont_learn = 1;
	596
	597	if (md->gbp & VXLAN_GBP_POLICY_APPLIED)
	598	gbp->policy_applied = 1;
	599
	600	gbp->policy_id = htons(md->gbp & VXLAN_GBP_ID_MASK);
	601	}
	602
48e92c44	603	#endif