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 *);
  33int ovs_ct_clear(struct sk_buff *skb, struct sw_flow_key *key);
  34
  35void ovs_ct_fill_key(const struct sk_buff *skb, struct sw_flow_key *key);
  36int ovs_ct_put_key(const struct sw_flow_key *swkey,
  37                   const struct sw_flow_key *output, struct sk_buff *skb);
  38void ovs_ct_free_action(const struct nlattr *a);
  39
  40#define CT_SUPPORTED_MASK (OVS_CS_F_NEW | OVS_CS_F_ESTABLISHED | \
  41                           OVS_CS_F_RELATED | OVS_CS_F_REPLY_DIR | \
  42                           OVS_CS_F_INVALID | OVS_CS_F_TRACKED | \
  43                           OVS_CS_F_SRC_NAT | OVS_CS_F_DST_NAT)
  44#else
  45#include <linux/errno.h>
  46
  47static inline void ovs_ct_init(struct net *net) { }
  48
  49static inline void ovs_ct_exit(struct net *net) { }
  50
  51static inline bool ovs_ct_verify(struct net *net, int attr)
  52{
  53        return false;
  54}
  55
  56static inline int ovs_ct_copy_action(struct net *net, const struct nlattr *nla,
  57                                     const struct sw_flow_key *key,
  58                                     struct sw_flow_actions **acts, bool log)
  59{
  60        return -ENOTSUPP;
  61}
  62
  63static inline int ovs_ct_action_to_attr(const struct ovs_conntrack_info *info,
  64                                        struct sk_buff *skb)
  65{
  66        return -ENOTSUPP;
  67}
  68
  69static inline int ovs_ct_execute(struct net *net, struct sk_buff *skb,
  70                                 struct sw_flow_key *key,
  71                                 const struct ovs_conntrack_info *info)
  72{
  73        kfree_skb(skb);
  74        return -ENOTSUPP;
  75}
  76
  77static inline int ovs_ct_clear(struct sk_buff *skb,
  78                               struct sw_flow_key *key)
  79{
  80        return -ENOTSUPP;
  81}
  82
  83static inline void ovs_ct_fill_key(const struct sk_buff *skb,
  84                                   struct sw_flow_key *key)
  85{
  86        key->ct_state = 0;
  87        key->ct_zone = 0;
  88        key->ct.mark = 0;
  89        memset(&key->ct.labels, 0, sizeof(key->ct.labels));
  90        /* Clear 'ct_orig_proto' to mark the non-existence of original
  91         * direction key fields.
  92         */
  93        key->ct_orig_proto = 0;
  94}
  95
  96static inline int ovs_ct_put_key(const struct sw_flow_key *swkey,
  97                                 const struct sw_flow_key *output,
  98                                 struct sk_buff *skb)
  99{
 100        return 0;
 101}
 102
 103static inline void ovs_ct_free_action(const struct nlattr *a) { }
 104
 105#define CT_SUPPORTED_MASK 0
 106#endif /* CONFIG_NF_CONNTRACK */
 107#endif /* ovs_conntrack.h */
 108