-/*
- * The absolute minimum fragment size. Note that there are many other
- * definitions of the minimum MTU.
- */
-#define IP_MIN_MTU 68
-
-/*
- * One of these goes in struct tnl_ops and in tnl_find_port().
- * These values are in the same namespace as other TNL_T_* values, so
- * only the least significant 10 bits are available to define protocol
- * identifiers.
- */
-#define TNL_T_PROTO_GRE 0
-#define TNL_T_PROTO_CAPWAP 1
-
-/* These flags are only needed when calling tnl_find_port(). */
-#define TNL_T_KEY_EXACT (1 << 10)
-#define TNL_T_KEY_MATCH (1 << 11)
-
-/* Private flags not exposed to userspace in this form. */
-#define TNL_F_IN_KEY_MATCH (1 << 16) /* Store the key in tun_id to
- * match in flow table. */
-#define TNL_F_OUT_KEY_ACTION (1 << 17) /* Get the key from a SET_TUNNEL
- * action. */
-
-/* All public tunnel flags. */
-#define TNL_F_PUBLIC (TNL_F_CSUM | TNL_F_TOS_INHERIT | TNL_F_TTL_INHERIT | \
- TNL_F_DF_INHERIT | TNL_F_DF_DEFAULT | TNL_F_PMTUD | \
- TNL_F_HDR_CACHE | TNL_F_IPSEC)
-
-/**
- * struct port_lookup_key - Tunnel port key, used as hash table key.
- * @in_key: Key to match on input, 0 for wildcard.
- * @saddr: IPv4 source address to match, 0 to accept any source address.
- * @daddr: IPv4 destination of tunnel.
- * @tunnel_type: Set of TNL_T_* flags that define lookup.
- */
-struct port_lookup_key {
- __be64 in_key;
- __be32 saddr;
- __be32 daddr;
- u32 tunnel_type;
-};
-
-#define PORT_KEY_LEN (offsetof(struct port_lookup_key, tunnel_type) + \
- FIELD_SIZEOF(struct port_lookup_key, tunnel_type))
-
-/**
- * struct tnl_mutable_config - modifiable configuration for a tunnel.
- * @key: Used as key for tunnel port. Configured via OVS_TUNNEL_ATTR_*
- * attributes.
- * @rcu: RCU callback head for deferred destruction.
- * @seq: Sequence number for distinguishing configuration versions.
- * @tunnel_hlen: Tunnel header length.
- * @eth_addr: Source address for packets generated by tunnel itself
- * (e.g. ICMP fragmentation needed messages).
- * @out_key: Key to use on output, 0 if this tunnel has no fixed output key.
- * @flags: TNL_F_* flags.
- * @tos: IPv4 TOS value to use for tunnel, 0 if no fixed TOS.
- * @ttl: IPv4 TTL value to use for tunnel, 0 if no fixed TTL.
- */
-struct tnl_mutable_config {
- struct port_lookup_key key;
- struct rcu_head rcu;
-
- unsigned seq;
-
- unsigned tunnel_hlen;
-
- unsigned char eth_addr[ETH_ALEN];
-
- /* Configured via OVS_TUNNEL_ATTR_* attributes. */
- __be64 out_key;
- u32 flags;
- u8 tos;
- u8 ttl;
-
- /* Multicast configuration. */
- int mlink;
-};
-
-struct tnl_ops {
- u32 tunnel_type; /* Put the TNL_T_PROTO_* type in here. */
- u8 ipproto; /* The IP protocol for the tunnel. */
-
- /*
- * Returns the length of the tunnel header that will be added in
- * build_header() (i.e. excludes the IP header). Returns a negative
- * error code if the configuration is invalid.
- */
- int (*hdr_len)(const struct tnl_mutable_config *);
-
- /*
- * Builds the static portion of the tunnel header, which is stored in
- * the header cache. In general the performance of this function is
- * not too important as we try to only call it when building the cache
- * so it is preferable to shift as much work as possible here. However,
- * in some circumstances caching is disabled and this function will be
- * called for every packet, so try not to make it too slow.
- */
- void (*build_header)(const struct vport *,
- const struct tnl_mutable_config *, void *header);