2 * Copyright (c) 2010 Nicira Networks.
3 * Distributed under the terms of the GNU GPL version 2.
5 * Significant portions of this file may be copied from parts of the Linux
6 * kernel, by Linus Torvalds and others.
12 #include "openvswitch/tunnel.h"
16 /* The absolute minimum fragment size. Note that there are many other
17 * definitions of the minimum MTU. */
21 * One of these goes in your struct tnl_ops and in tnl_find_port().
22 * These values are in the same namespace as other TNL_T_* values, so
23 * you have only the first 10 bits to define protocol identifiers.
25 #define TNL_T_PROTO_GRE 0
27 /* You only need these flags when you are calling tnl_find_port(). */
28 #define TNL_T_KEY_EXACT (1 << 10)
29 #define TNL_T_KEY_MATCH (1 << 11)
30 #define TNL_T_KEY_EITHER (TNL_T_KEY_EXACT | TNL_T_KEY_MATCH)
32 struct tnl_mutable_config {
35 unsigned char eth_addr[ETH_ALEN];
37 struct tnl_port_config port_config;
39 /* Set of TNL_T_* flags that define the category for lookup. */
42 int tunnel_hlen; /* Tunnel header length. */
46 /* Put your TNL_T_PROTO_* type in here. */
50 int (*hdr_len)(const struct tnl_port_config *);
51 void (*build_header)(struct sk_buff *, const struct vport *,
52 const struct tnl_mutable_config *);
57 struct tbl_node tbl_node;
60 const struct tnl_ops *tnl_ops;
62 /* Protected by RCU. */
63 struct tnl_mutable_config *mutable;
68 struct vport *tnl_create(const char *name, const void __user *config,
69 const struct vport_ops *,
70 const struct tnl_ops *);
71 int tnl_modify(struct vport *, const void __user *config);
72 int tnl_destroy(struct vport *);
73 int tnl_set_mtu(struct vport *vport, int mtu);
74 int tnl_set_addr(struct vport *vport, const unsigned char *addr);
75 const char *tnl_get_name(const struct vport *vport);
76 const unsigned char *tnl_get_addr(const struct vport *vport);
77 int tnl_get_mtu(const struct vport *vport);
78 int tnl_send(struct vport *vport, struct sk_buff *skb);
79 void tnl_rcv(struct vport *vport, struct sk_buff *skb);
81 struct vport *tnl_find_port(__be32 saddr, __be32 daddr, __be32 key,
83 const struct tnl_mutable_config **mutable);
84 bool tnl_frag_needed(struct vport *vport,
85 const struct tnl_mutable_config *mutable,
86 struct sk_buff *skb, unsigned int mtu, __be32 flow_key);
88 static inline struct tnl_vport *tnl_vport_priv(const struct vport *vport)
90 return vport_priv(vport);