[mirror_ovs.git] / datapath / linux / compat / include / net / vxlan.h

#ifndef __NET_VXLAN_WRAPPER_H
#define __NET_VXLAN_WRAPPER_H 1

#ifdef CONFIG_INET
#include <net/udp_tunnel.h>
#endif


#ifdef HAVE_METADATA_DST
#include_next <net/vxlan.h>

static inline int rpl_vxlan_init_module(void)
{
	return 0;
}
static inline void rpl_vxlan_cleanup_module(void)
{}

#define vxlan_xmit dev_queue_xmit

#else

#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>

#include "compat.h"
#include "gso.h"

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

/*
 * VXLAN Group Based Policy Extension:
 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 * |1|-|-|-|1|-|-|-|R|D|R|R|A|R|R|R|        Group Policy ID        |
 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 * |                VXLAN Network Identifier (VNI) |   Reserved    |
 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 *
 * 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.
 *
 * [0] 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;
};

#define VXLAN_GBP_USED_BITS (VXLAN_HF_GBP | 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)

/* VXLAN protocol header:
 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 * |G|R|R|R|I|R|R|C|               Reserved                        |
 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 * |                VXLAN Network Identifier (VNI) |   Reserved    |
 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 *
 * G = 1	Group Policy (VXLAN-GBP)
 * I = 1	VXLAN Network Identifier (VNI) present
 * C = 1	Remote checksum offload (RCO)
 */
struct vxlanhdr {
	__be32 vx_flags;
	__be32 vx_vni;
};

/* VXLAN header flags. */
#define VXLAN_HF_RCO BIT(24)
#define VXLAN_HF_VNI BIT(27)
#define VXLAN_HF_GBP BIT(31)

/* Remote checksum offload header option */
#define VXLAN_RCO_MASK  0x7f    /* Last byte of vni field */
#define VXLAN_RCO_UDP   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 (VXLAN_RCO_MASK << VXLAN_RCO_SHIFT)

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

struct vxlan_metadata {
	__be32          vni;
	u32             gbp;
};

#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)

/* 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;
#ifdef HAVE_UDP_OFFLOAD
	struct udp_offload udp_offloads;
#endif
	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;
	u32			 remote_vni;
	u32			 remote_ifindex;
	struct list_head	 list;
	struct rcu_head		 rcu;
};

struct vxlan_config {
	union vxlan_addr	remote_ip;
	union vxlan_addr	saddr;
	u32			vni;
	int			remote_ifindex;
	int			mtu;
	__be16			dst_port;
	__u16			port_min;
	__u16			port_max;
	__u8			tos;
	__u8			ttl;
	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 *vn_sock;	/* listening socket */
	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 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_CSUM		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)
#define vxlan_dev_create rpl_vxlan_dev_create
struct net_device *rpl_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)
{
	return inet_sport(vxlan->vn_sock->sock->sk);
}

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

	if (!skb_encapsulation(skb))
		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) && (
#ifdef ENCAP_TYPE_ETHER
	    skb->inner_protocol_type != ENCAP_TYPE_ETHER ||
#endif
	     ovs_skb_get_inner_protocol(skb) != 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)

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

int rpl_vxlan_init_module(void);
void rpl_vxlan_cleanup_module(void);

#define vxlan_xmit rpl_vxlan_xmit
netdev_tx_t rpl_vxlan_xmit(struct sk_buff *skb);
#endif

#define vxlan_init_module rpl_vxlan_init_module
#define vxlan_cleanup_module rpl_vxlan_cleanup_module

#endif
Commit	Line	Data
1b7ee51f	1	#ifndef __NET_VXLAN_WRAPPER_H
e23775f2	2	#define __NET_VXLAN_WRAPPER_H 1
1b7ee51f	3
e23775f2 PS	4	#ifdef CONFIG_INET
	5	#include <net/udp_tunnel.h>
	6	#endif
ababf424	7
9ffdbf41	8
e23775f2	9	#ifdef HAVE_METADATA_DST
29c71cfa	10	#include_next <net/vxlan.h>
ababf424	11
e23775f2 PS	12	static inline int rpl_vxlan_init_module(void)
	13	{
	14	return 0;
	15	}
	16	static inline void rpl_vxlan_cleanup_module(void)
	17	{}
c7d084d6	18
e23775f2 PS	19	#define vxlan_xmit dev_queue_xmit
	20
	21	#else
	22
	23	#include <linux/ip.h>
	24	#include <linux/ipv6.h>
	25	#include <linux/if_vlan.h>
	26	#include <linux/skbuff.h>
	27	#include <linux/netdevice.h>
	28	#include <linux/udp.h>
	29	#include <net/dst_metadata.h>
	30
	31	#include "compat.h"
	32	#include "gso.h"
	33
	34	#define VNI_HASH_BITS 10
	35	#define VNI_HASH_SIZE (1<<VNI_HASH_BITS)
ababf424	36
3174a818 TG	37	/*
	38	* VXLAN Group Based Policy Extension:
	39	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	40	* \|1\|-\|-\|-\|1\|-\|-\|-\|R\|D\|R\|R\|A\|R\|R\|R\| Group Policy ID \|
	41	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	42	* \| VXLAN Network Identifier (VNI) \| Reserved \|
	43	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	44	*
	45	* D = Don't Learn bit. When set, this bit indicates that the egress
	46	* VTEP MUST NOT learn the source address of the encapsulated frame.
	47	*
	48	* A = Indicates that the group policy has already been applied to
	49	* this packet. Policies MUST NOT be applied by devices when the
	50	* A bit is set.
	51	*
	52	* [0] https://tools.ietf.org/html/draft-smith-vxlan-group-policy
	53	*/
	54	struct vxlanhdr_gbp {
	55	__u8 vx_flags;
	56	#ifdef __LITTLE_ENDIAN_BITFIELD
	57	__u8 reserved_flags1:3,
	58	policy_applied:1,
	59	reserved_flags2:2,
	60	dont_learn:1,
	61	reserved_flags3:1;
	62	#elif defined(__BIG_ENDIAN_BITFIELD)
	63	__u8 reserved_flags1:1,
	64	dont_learn:1,
	65	reserved_flags2:2,
	66	policy_applied:1,
	67	reserved_flags3:3;
	68	#else
	69	#error "Please fix <asm/byteorder.h>"
	70	#endif
	71	__be16 policy_id;
	72	__be32 vx_vni;
	73	};
e23775f2	74
3174a818 TG	75	#define VXLAN_GBP_USED_BITS (VXLAN_HF_GBP \| 0xFFFFFF)
	76
	77	/* skb->mark mapping
	78	*
	79	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	80	* \|R\|R\|R\|R\|R\|R\|R\|R\|R\|D\|R\|R\|A\|R\|R\|R\| Group Policy ID \|
	81	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	82	*/
	83	#define VXLAN_GBP_DONT_LEARN (BIT(6) << 16)
	84	#define VXLAN_GBP_POLICY_APPLIED (BIT(3) << 16)
	85	#define VXLAN_GBP_ID_MASK (0xFFFF)
	86
e23775f2 PS	87	/* VXLAN protocol header:
	88	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	89	* \|G\|R\|R\|R\|I\|R\|R\|C\| Reserved \|
	90	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	91	* \| VXLAN Network Identifier (VNI) \| Reserved \|
	92	* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	93	*
	94	* G = 1 Group Policy (VXLAN-GBP)
	95	* I = 1 VXLAN Network Identifier (VNI) present
	96	* C = 1 Remote checksum offload (RCO)
	97	*/
	98	struct vxlanhdr {
	99	__be32 vx_flags;
	100	__be32 vx_vni;
	101	};
44e1f2a8	102
e23775f2 PS	103	/* VXLAN header flags. */
	104	#define VXLAN_HF_RCO BIT(24)
	105	#define VXLAN_HF_VNI BIT(27)
	106	#define VXLAN_HF_GBP BIT(31)
c7d084d6	107
e23775f2 PS	108	/* Remote checksum offload header option */
	109	#define VXLAN_RCO_MASK 0x7f /* Last byte of vni field */
	110	#define VXLAN_RCO_UDP 0x80 /* Indicate UDP RCO (TCP when not set ) /
	111	#define VXLAN_RCO_SHIFT 1 /* Left shift of start */
	112	#define VXLAN_RCO_SHIFT_MASK ((1 << VXLAN_RCO_SHIFT) - 1)
	113	#define VXLAN_MAX_REMCSUM_START (VXLAN_RCO_MASK << VXLAN_RCO_SHIFT)
c7d084d6	114
e23775f2 PS	115	#define VXLAN_N_VID (1u << 24)
	116	#define VXLAN_VID_MASK (VXLAN_N_VID - 1)
	117	#define VXLAN_VNI_MASK (VXLAN_VID_MASK << 8)
	118	#define VXLAN_HLEN (sizeof(struct udphdr) + sizeof(struct vxlanhdr))
29c71cfa	119
3174a818	120	struct vxlan_metadata {
e23775f2 PS	121	__be32 vni;
e23775f2 PS	122	u32 gbp;
3174a818 TG	123	};
3174a818 TG	124
e23775f2 PS	125	#define VNI_HASH_BITS 10
	126	#define VNI_HASH_SIZE (1<<VNI_HASH_BITS)
	127	#define FDB_HASH_BITS 8
	128	#define FDB_HASH_SIZE (1<<FDB_HASH_BITS)
a109c9fb	129
1b7ee51f PS	130	/* per UDP socket information */
	131	struct vxlan_sock {
	132	struct hlist_node hlist;
1b7ee51f	133	struct work_struct del_work;
a109c9fb PS	134	struct socket *sock;
a109c9fb PS	135	struct rcu_head rcu;
e23775f2 PS	136	struct hlist_head vni_list[VNI_HASH_SIZE];
	137	atomic_t refcnt;
	138	#ifdef HAVE_UDP_OFFLOAD
	139	struct udp_offload udp_offloads;
	140	#endif
3174a818	141	u32 flags;
1b7ee51f PS	142	};
1b7ee51f PS	143
e23775f2 PS	144	union vxlan_addr {
	145	struct sockaddr_in sin;
	146	struct sockaddr_in6 sin6;
	147	struct sockaddr sa;
	148	};
	149
	150	struct vxlan_rdst {
	151	union vxlan_addr remote_ip;
	152	__be16 remote_port;
	153	u32 remote_vni;
	154	u32 remote_ifindex;
	155	struct list_head list;
	156	struct rcu_head rcu;
	157	};
	158
	159	struct vxlan_config {
	160	union vxlan_addr remote_ip;
	161	union vxlan_addr saddr;
	162	u32 vni;
	163	int remote_ifindex;
	164	int mtu;
	165	__be16 dst_port;
	166	__u16 port_min;
	167	__u16 port_max;
	168	__u8 tos;
	169	__u8 ttl;
	170	u32 flags;
	171	unsigned long age_interval;
	172	unsigned int addrmax;
	173	bool no_share;
	174	};
	175
	176	/* Pseudo network device */
	177	struct vxlan_dev {
	178	struct hlist_node hlist; /* vni hash table */
	179	struct list_head next; /* vxlan's per namespace list */
	180	struct vxlan_sock vn_sock; / listening socket */
	181	struct net_device *dev;
	182	struct net net; / netns for packet i/o */
	183	struct vxlan_rdst default_dst; /* default destination */
	184	u32 flags; /* VXLAN_F_* in vxlan.h */
	185
	186	struct timer_list age_timer;
	187	spinlock_t hash_lock;
	188	unsigned int addrcnt;
1b7ee51f	189
e23775f2 PS	190	struct vxlan_config cfg;
	191	struct hlist_head fdb_head[FDB_HASH_SIZE];
	192	};
	193
	194	#define VXLAN_F_LEARN 0x01
	195	#define VXLAN_F_PROXY 0x02
	196	#define VXLAN_F_RSC 0x04
	197	#define VXLAN_F_L2MISS 0x08
	198	#define VXLAN_F_L3MISS 0x10
	199	#define VXLAN_F_IPV6 0x20
	200	#define VXLAN_F_UDP_CSUM 0x40
	201	#define VXLAN_F_UDP_ZERO_CSUM6_TX 0x80
	202	#define VXLAN_F_UDP_ZERO_CSUM6_RX 0x100
	203	#define VXLAN_F_REMCSUM_TX 0x200
	204	#define VXLAN_F_REMCSUM_RX 0x400
	205	#define VXLAN_F_GBP 0x800
	206	#define VXLAN_F_REMCSUM_NOPARTIAL 0x1000
	207	#define VXLAN_F_COLLECT_METADATA 0x2000
	208
	209	/* Flags that are used in the receive path. These flags must match in
	210	* order for a socket to be shareable
	211	*/
	212	#define VXLAN_F_RCV_FLAGS (VXLAN_F_GBP \| \
	213	VXLAN_F_UDP_ZERO_CSUM6_RX \| \
	214	VXLAN_F_REMCSUM_RX \| \
	215	VXLAN_F_REMCSUM_NOPARTIAL \| \
	216	VXLAN_F_COLLECT_METADATA)
	217	#define vxlan_dev_create rpl_vxlan_dev_create
	218	struct net_device rpl_vxlan_dev_create(struct net net, const char *name,
	219	u8 name_assign_type, struct vxlan_config *conf);
	220
	221	static inline __be16 vxlan_dev_dst_port(struct vxlan_dev *vxlan)
	222	{
	223	return inet_sport(vxlan->vn_sock->sock->sk);
	224	}
	225
	226	static inline netdev_features_t vxlan_features_check(struct sk_buff *skb,
	227	netdev_features_t features)
	228	{
	229	u8 l4_hdr = 0;
	230
	231	if (!skb_encapsulation(skb))
	232	return features;
	233
	234	switch (vlan_get_protocol(skb)) {
	235	case htons(ETH_P_IP):
	236	l4_hdr = ip_hdr(skb)->protocol;
	237	break;
	238	case htons(ETH_P_IPV6):
	239	l4_hdr = ipv6_hdr(skb)->nexthdr;
	240	break;
	241	default:
	242	return features;
	243	}
	244
	245	if ((l4_hdr == IPPROTO_UDP) && (
	246	#ifdef ENCAP_TYPE_ETHER
	247	skb->inner_protocol_type != ENCAP_TYPE_ETHER \|\|
	248	#endif
	249	ovs_skb_get_inner_protocol(skb) != htons(ETH_P_TEB) \|\|
	250	(skb_inner_mac_header(skb) - skb_transport_header(skb) !=
	251	sizeof(struct udphdr) + sizeof(struct vxlanhdr))))
	252	return features & ~(NETIF_F_ALL_CSUM \| NETIF_F_GSO_MASK);
	253
254	return features;
255	}
256
257	/* IP header + UDP + VXLAN + Ethernet header */
258	#define VXLAN_HEADROOM (20 + 8 + 8 + 14)
259	/* IPv6 header + UDP + VXLAN + Ethernet header */
260	#define VXLAN6_HEADROOM (40 + 8 + 8 + 14)
261
262	static inline unsigned short vxlan_get_sk_family(struct vxlan_sock *vs)
263	{
264	return vs->sock->sk->sk_family;
265	}
266
267	int rpl_vxlan_init_module(void);
268	void rpl_vxlan_cleanup_module(void);
269
270	#define vxlan_xmit rpl_vxlan_xmit
271	netdev_tx_t rpl_vxlan_xmit(struct sk_buff *skb);
272	#endif
1b7ee51f	273
e23775f2 PS	274	#define vxlan_init_module rpl_vxlan_init_module
e23775f2 PS	275	#define vxlan_cleanup_module rpl_vxlan_cleanup_module
1b7ee51f	276
1b7ee51f	277	#endif