X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=datapath%2Ftunnel.h;h=19240171005aaab2cdb9c1c815a2956aaf8fd74f;hb=e615b0a347057f9af7e93922acd4ae794ac87015;hp=63f7dd42c0c5a2b334b5edcf3e172c771cfdccbd;hpb=94903c989826268a7fab3c730cd7d0b35ef423d5;p=openvswitch diff --git a/datapath/tunnel.h b/datapath/tunnel.h index 63f7dd42..19240171 100644 --- a/datapath/tunnel.h +++ b/datapath/tunnel.h @@ -1,19 +1,30 @@ /* - * Copyright (c) 2010 Nicira Networks. - * Distributed under the terms of the GNU GPL version 2. + * Copyright (c) 2007-2012 Nicira, Inc. * - * Significant portions of this file may be copied from parts of the Linux - * kernel, by Linus Torvalds and others. + * This program is free software; you can redistribute it and/or + * modify it under the terms of version 2 of the GNU General Public + * License as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA */ #ifndef TUNNEL_H #define TUNNEL_H 1 #include +#include +#include #include "flow.h" #include "openvswitch/tunnel.h" -#include "table.h" #include "vport.h" /* @@ -34,20 +45,81 @@ /* These flags are only needed when calling tnl_find_port(). */ #define TNL_T_KEY_EXACT (1 << 10) #define TNL_T_KEY_MATCH (1 << 11) -#define TNL_T_KEY_EITHER (TNL_T_KEY_EXACT | TNL_T_KEY_MATCH) +/* 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. + * @net: Network namespace of the port. + * @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; +#ifdef CONFIG_NET_NS + struct net *net; +#endif + __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)) + +static inline struct net *port_key_get_net(const struct port_lookup_key *key) +{ + return read_pnet(&key->net); +} + +static inline void port_key_set_net(struct port_lookup_key *key, struct net *net) +{ + write_pnet(&key->net, net); +} + +/** + * 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; /* Sequence number to identify this config. */ + unsigned seq; - u32 tunnel_type; /* Set of TNL_T_* flags that define lookup. */ - unsigned tunnel_hlen; /* Tunnel header length. */ + unsigned tunnel_hlen; unsigned char eth_addr[ETH_ALEN]; - unsigned mtu; - struct tnl_port_config port_config; + /* Configured via OVS_TUNNEL_ATTR_* attributes. */ + __be64 out_key; + u32 flags; + u8 tos; + u8 ttl; + + /* Multicast configuration. */ + int mlink; }; struct tnl_ops { @@ -59,7 +131,7 @@ struct tnl_ops { * build_header() (i.e. excludes the IP header). Returns a negative * error code if the configuration is invalid. */ - int (*hdr_len)(const struct tnl_port_config *); + int (*hdr_len)(const struct tnl_mutable_config *); /* * Builds the static portion of the tunnel header, which is stored in @@ -107,8 +179,10 @@ struct tnl_cache { struct rcu_head rcu; int len; /* Length of data to be memcpy'd from cache. */ + int hh_len; /* Hardware hdr length, cached from hh_cache. */ - /* Sequence number of mutable->seq from which this cache was generated. */ + /* Sequence number of mutable->seq from which this cache was + * generated. */ unsigned mutable_seq; #ifdef HAVE_HH_SEQ @@ -156,12 +230,12 @@ struct tnl_cache { struct tnl_vport { struct rcu_head rcu; - struct tbl_node tbl_node; + struct hlist_node hash_node; char name[IFNAMSIZ]; const struct tnl_ops *tnl_ops; - struct tnl_mutable_config *mutable; /* Protected by RCU. */ + struct tnl_mutable_config __rcu *mutable; /* * ID of last fragment sent (for tunnel protocols with direct support @@ -171,7 +245,7 @@ struct tnl_vport { atomic_t frag_id; spinlock_t cache_lock; - struct tnl_cache *cache; /* Protected by RCU/cache_lock. */ + struct tnl_cache __rcu *cache; /* Protected by RCU/cache_lock. */ #ifdef NEED_CACHE_TIMEOUT /* @@ -184,30 +258,32 @@ struct tnl_vport { #endif }; -struct vport *tnl_create(const struct vport_parms *, const struct vport_ops *, - const struct tnl_ops *); -int tnl_modify(struct vport *, const void __user *config); -int tnl_destroy(struct vport *); -int tnl_set_mtu(struct vport *vport, int mtu); -int tnl_set_addr(struct vport *vport, const unsigned char *addr); -const char *tnl_get_name(const struct vport *vport); -const unsigned char *tnl_get_addr(const struct vport *vport); -int tnl_get_mtu(const struct vport *vport); -int tnl_send(struct vport *vport, struct sk_buff *skb); -void tnl_rcv(struct vport *vport, struct sk_buff *skb); - -struct vport *tnl_find_port(__be32 saddr, __be32 daddr, __be32 key, - int tunnel_type, - const struct tnl_mutable_config **mutable); -bool tnl_frag_needed(struct vport *vport, - const struct tnl_mutable_config *mutable, - struct sk_buff *skb, unsigned int mtu, __be32 flow_key); -void tnl_free_linked_skbs(struct sk_buff *skb); - +struct vport *ovs_tnl_create(const struct vport_parms *, const struct vport_ops *, + const struct tnl_ops *); +void ovs_tnl_destroy(struct vport *); + +int ovs_tnl_set_options(struct vport *, struct nlattr *); +int ovs_tnl_get_options(const struct vport *, struct sk_buff *); + +int ovs_tnl_set_addr(struct vport *vport, const unsigned char *addr); +const char *ovs_tnl_get_name(const struct vport *vport); +const unsigned char *ovs_tnl_get_addr(const struct vport *vport); +int ovs_tnl_send(struct vport *vport, struct sk_buff *skb); +void ovs_tnl_rcv(struct vport *vport, struct sk_buff *skb, u8 tos); + +struct vport *ovs_tnl_find_port(struct net *net, __be32 saddr, __be32 daddr, + __be64 key, int tunnel_type, + const struct tnl_mutable_config **mutable); +bool ovs_tnl_frag_needed(struct vport *vport, + const struct tnl_mutable_config *mutable, + struct sk_buff *skb, unsigned int mtu, __be64 flow_key); +void ovs_tnl_free_linked_skbs(struct sk_buff *skb); + +int ovs_tnl_init(void); +void ovs_tnl_exit(void); static inline struct tnl_vport *tnl_vport_priv(const struct vport *vport) { return vport_priv(vport); } - #endif /* tunnel.h */