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;
  20struct ovs_ct_limit_info;
  21enum ovs_key_attr;
  22
  23#if IS_ENABLED(CONFIG_NF_CONNTRACK)
  24int ovs_ct_init(struct net *);
  25void ovs_ct_exit(struct net *);
  26bool ovs_ct_verify(struct net *, enum ovs_key_attr attr);
  27int ovs_ct_copy_action(struct net *, const struct nlattr *,
  28                       const struct sw_flow_key *, struct sw_flow_actions **,
  29                       bool log);
  30int ovs_ct_action_to_attr(const struct ovs_conntrack_info *, struct sk_buff *);
  31
  32int ovs_ct_execute(struct net *, struct sk_buff *, struct sw_flow_key *,
  33                   const struct ovs_conntrack_info *);
  34int ovs_ct_clear(struct sk_buff *skb, struct sw_flow_key *key);
  35
  36void ovs_ct_fill_key(const struct sk_buff *skb, struct sw_flow_key *key);
  37int ovs_ct_put_key(const struct sw_flow_key *swkey,
  38                   const struct sw_flow_key *output, struct sk_buff *skb);
  39void ovs_ct_free_action(const struct nlattr *a);
  40
  41#define CT_SUPPORTED_MASK (OVS_CS_F_NEW | OVS_CS_F_ESTABLISHED | \
  42                           OVS_CS_F_RELATED | OVS_CS_F_REPLY_DIR | \
  43                           OVS_CS_F_INVALID | OVS_CS_F_TRACKED | \
  44                           OVS_CS_F_SRC_NAT | OVS_CS_F_DST_NAT)
  45#else
  46#include <linux/errno.h>
  47
  48static inline int ovs_ct_init(struct net *net) { return 0; }
  49
  50static inline void ovs_ct_exit(struct net *net) { }
  51
  52static inline bool ovs_ct_verify(struct net *net, int attr)
  53{
  54        return false;
  55}
  56
  57static inline int ovs_ct_copy_action(struct net *net, const struct nlattr *nla,
  58                                     const struct sw_flow_key *key,
  59                                     struct sw_flow_actions **acts, bool log)
  60{
  61        return -ENOTSUPP;
  62}
  63
  64static inline int ovs_ct_action_to_attr(const struct ovs_conntrack_info *info,
  65                                        struct sk_buff *skb)
  66{
  67        return -ENOTSUPP;
  68}
  69
  70static inline int ovs_ct_execute(struct net *net, struct sk_buff *skb,
  71                                 struct sw_flow_key *key,
  72                                 const struct ovs_conntrack_info *info)
  73{
  74        kfree_skb(skb);
  75        return -ENOTSUPP;
  76}
  77
  78static inline int ovs_ct_clear(struct sk_buff *skb,
  79                               struct sw_flow_key *key)
  80{
  81        return -ENOTSUPP;
  82}
  83
  84static inline void ovs_ct_fill_key(const struct sk_buff *skb,
  85                                   struct sw_flow_key *key)
  86{
  87        key->ct_state = 0;
  88        key->ct_zone = 0;
  89        key->ct.mark = 0;
  90        memset(&key->ct.labels, 0, sizeof(key->ct.labels));
  91        /* Clear 'ct_orig_proto' to mark the non-existence of original
  92         * direction key fields.
  93         */
  94        key->ct_orig_proto = 0;
  95}
  96
  97static inline int ovs_ct_put_key(const struct sw_flow_key *swkey,
  98                                 const struct sw_flow_key *output,
  99                                 struct sk_buff *skb)
 100{
 101        return 0;
 102}
 103
 104static inline void ovs_ct_free_action(const struct nlattr *a) { }
 105
 106#define CT_SUPPORTED_MASK 0
 107#endif /* CONFIG_NF_CONNTRACK */
 108
 109#if IS_ENABLED(CONFIG_NETFILTER_CONNCOUNT)
 110extern struct genl_family dp_ct_limit_genl_family;
 111#endif
 112#endif /* ovs_conntrack.h */
 113