#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/udp.h>
+#include <net/gre.h>
-struct vxlan_sock;
-typedef void (vxlan_rcv_t)(struct vxlan_sock *vs, struct sk_buff *skb, __be32 key);
+#include <linux/version.h>
+
+#ifdef USE_KERNEL_TUNNEL_API
+#include_next <net/vxlan.h>
+#endif
+
+#ifndef VXLAN_HLEN
+/* VXLAN header flags. */
+#define VXLAN_HF_VNI 0x08000000
+#ifndef VXLAN_HF_GBP
+#define VXLAN_HF_GBP 0x80000000
+#endif
+
+#define VXLAN_N_VID (1u << 24)
+#define VXLAN_VID_MASK (VXLAN_N_VID - 1)
+#define VXLAN_HLEN (sizeof(struct udphdr) + sizeof(struct vxlanhdr))
+#endif
+
+#ifndef VXLAN_GBP_USED_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)
+
+#define VXLAN_F_GBP 0x800
+#endif
+
+#ifdef HAVE_VXLAN_METADATA
+static inline int rpl_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,
+ struct vxlan_metadata *md)
+{
+ if (skb_is_gso(skb) && skb_is_encapsulated(skb)) {
+ kfree_skb(skb);
+ return -ENOSYS;
+ }
+
+ return vxlan_xmit_skb(vs, rt, skb, src, dst, tos, ttl, df,
+ src_port, dst_port, md, false);
+}
+
+#define vxlan_xmit_skb rpl_vxlan_xmit_skb
+#else /* HAVE_VXLAN_METADATA */
+
+struct vxlan_metadata {
+ __be32 vni;
+ u32 gbp;
+};
+
+#define vxlan_sock rpl_vxlan_sock
+struct rpl_vxlan_sock;
+
+#define vxlan_rcv_t rpl_vxlan_rcv_t
+typedef void (vxlan_rcv_t)(struct vxlan_sock *vh, struct sk_buff *skb,
+ struct vxlan_metadata *md);
/* per UDP socket information */
struct vxlan_sock {
struct work_struct del_work;
struct socket *sock;
struct rcu_head rcu;
+ u32 flags;
};
+#define vxlan_sock_add rpl_vxlan_sock_add
struct vxlan_sock *vxlan_sock_add(struct net *net, __be16 port,
vxlan_rcv_t *rcv, void *data,
- bool no_share);
+ bool no_share, u32 flags);
+#define vxlan_sock_release rpl_vxlan_sock_release
void vxlan_sock_release(struct vxlan_sock *vs);
+#define vxlan_xmit_skb rpl_vxlan_xmit_skb
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);
+ __be16 src_port, __be16 dst_port,
+ struct vxlan_metadata *md);
+#define vxlan_src_port rpl_vxlan_src_port
__be16 vxlan_src_port(__u16 port_min, __u16 port_max, struct sk_buff *skb);
+#endif /* !HAVE_VXLAN_METADATA */
#endif