LXR linux/net/openvswitch/conntrack.h

   1/*
   2 * Copyright (c) 2015 Nicira, Inc.
   3 *
   4 * This program is free software; you can redistribute it and/or
   5 * modify it under the terms of version 2 of the GNU General Public
   6 * License as published by the Free Software Foundation.
   7 *
   8 * This program is distributed in the hope that it will be useful, but
   9 * WITHOUT ANY WARRANTY; without even the implied warranty of
  10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  11 * General Public License for more details.
  12 */
  13
  14#ifndef OVS_CONNTRACK_H
  15#define OVS_CONNTRACK_H 1
  16
  17#include "flow.h"
  18
  19struct ovs_conntrack_info;
  20enum ovs_key_attr;
  21
  22#if IS_ENABLED(CONFIG_NF_CONNTRACK)
  23void ovs_ct_init(struct net *);
  24void ovs_ct_exit(struct net *);
  25bool ovs_ct_verify(struct net *, enum ovs_key_attr attr);
  26int ovs_ct_copy_action(struct net *, const struct nlattr *,
  27                       const struct sw_flow_key *, struct sw_flow_actions **,
  28                       bool log);
  29int ovs_ct_action_to_attr(const struct ovs_conntrack_info *, struct sk_buff *);
  30
  31int ovs_ct_execute(struct net *, struct sk_buff *, struct sw_flow_key *,
  32                   const struct ovs_conntrack_info *);
  33
  34void ovs_ct_fill_key(const struct sk_buff *skb, struct sw_flow_key *key);
  35int ovs_ct_put_key(const struct sw_flow_key *key, struct sk_buff *skb);
  36void ovs_ct_free_action(const struct nlattr *a);
  37
  38#define CT_SUPPORTED_MASK (OVS_CS_F_NEW | OVS_CS_F_ESTABLISHED | \
  39                           OVS_CS_F_RELATED | OVS_CS_F_REPLY_DIR | \
  40                           OVS_CS_F_INVALID | OVS_CS_F_TRACKED | \
  41                           OVS_CS_F_SRC_NAT | OVS_CS_F_DST_NAT)
  42#else
  43#include <linux/errno.h>
  44
  45static inline void ovs_ct_init(struct net *net) { }
  46
  47static inline void ovs_ct_exit(struct net *net) { }
  48
  49static inline bool ovs_ct_verify(struct net *net, int attr)
  50{
  51        return false;
  52}
  53
  54static inline int ovs_ct_copy_action(struct net *net, const struct nlattr *nla,
  55                                     const struct sw_flow_key *key,
  56                                     struct sw_flow_actions **acts, bool log)
  57{
  58        return -ENOTSUPP;
  59}
  60
  61static inline int ovs_ct_action_to_attr(const struct ovs_conntrack_info *info,
  62                                        struct sk_buff *skb)
  63{
  64        return -ENOTSUPP;
  65}
  66
  67static inline int ovs_ct_execute(struct net *net, struct sk_buff *skb,
  68                                 struct sw_flow_key *key,
  69                                 const struct ovs_conntrack_info *info)
  70{
  71        kfree_skb(skb);
  72        return -ENOTSUPP;
  73}
  74
  75static inline void ovs_ct_fill_key(const struct sk_buff *skb,
  76                                   struct sw_flow_key *key)
  77{
  78        key->ct.state = 0;
  79        key->ct.zone = 0;
  80        key->ct.mark = 0;
  81        memset(&key->ct.labels, 0, sizeof(key->ct.labels));
  82}
  83
  84static inline int ovs_ct_put_key(const struct sw_flow_key *key,
  85                                 struct sk_buff *skb)
  86{
  87        return 0;
  88}
  89
  90static inline void ovs_ct_free_action(const struct nlattr *a) { }
  91
  92#define CT_SUPPORTED_MASK 0
  93#endif /* CONFIG_NF_CONNTRACK */
  94#endif /* ovs_conntrack.h */
  95