LXR linux/net/openvswitch/conntrack.h

   1/* SPDX-License-Identifier: GPL-2.0-only */
   2/*
   3 * Copyright (c) 2015 Nicira, Inc.
   4 */
   5
   6#ifndef OVS_CONNTRACK_H
   7#define OVS_CONNTRACK_H 1
   8
   9#include "flow.h"
  10
  11struct ovs_conntrack_info;
  12struct ovs_ct_limit_info;
  13enum ovs_key_attr;
  14
  15#if IS_ENABLED(CONFIG_NF_CONNTRACK)
  16int ovs_ct_init(struct net *);
  17void ovs_ct_exit(struct net *);
  18bool ovs_ct_verify(struct net *, enum ovs_key_attr attr);
  19int ovs_ct_copy_action(struct net *, const struct nlattr *,
  20                       const struct sw_flow_key *, struct sw_flow_actions **,
  21                       bool log);
  22int ovs_ct_action_to_attr(const struct ovs_conntrack_info *, struct sk_buff *);
  23
  24int ovs_ct_execute(struct net *, struct sk_buff *, struct sw_flow_key *,
  25                   const struct ovs_conntrack_info *);
  26int ovs_ct_clear(struct sk_buff *skb, struct sw_flow_key *key);
  27
  28void ovs_ct_fill_key(const struct sk_buff *skb, struct sw_flow_key *key);
  29int ovs_ct_put_key(const struct sw_flow_key *swkey,
  30                   const struct sw_flow_key *output, struct sk_buff *skb);
  31void ovs_ct_free_action(const struct nlattr *a);
  32
  33#define CT_SUPPORTED_MASK (OVS_CS_F_NEW | OVS_CS_F_ESTABLISHED | \
  34                           OVS_CS_F_RELATED | OVS_CS_F_REPLY_DIR | \
  35                           OVS_CS_F_INVALID | OVS_CS_F_TRACKED | \
  36                           OVS_CS_F_SRC_NAT | OVS_CS_F_DST_NAT)
  37#else
  38#include <linux/errno.h>
  39
  40static inline int ovs_ct_init(struct net *net) { return 0; }
  41
  42static inline void ovs_ct_exit(struct net *net) { }
  43
  44static inline bool ovs_ct_verify(struct net *net, int attr)
  45{
  46        return false;
  47}
  48
  49static inline int ovs_ct_copy_action(struct net *net, const struct nlattr *nla,
  50                                     const struct sw_flow_key *key,
  51                                     struct sw_flow_actions **acts, bool log)
  52{
  53        return -ENOTSUPP;
  54}
  55
  56static inline int ovs_ct_action_to_attr(const struct ovs_conntrack_info *info,
  57                                        struct sk_buff *skb)
  58{
  59        return -ENOTSUPP;
  60}
  61
  62static inline int ovs_ct_execute(struct net *net, struct sk_buff *skb,
  63                                 struct sw_flow_key *key,
  64                                 const struct ovs_conntrack_info *info)
  65{
  66        kfree_skb(skb);
  67        return -ENOTSUPP;
  68}
  69
  70static inline int ovs_ct_clear(struct sk_buff *skb,
  71                               struct sw_flow_key *key)
  72{
  73        return -ENOTSUPP;
  74}
  75
  76static inline void ovs_ct_fill_key(const struct sk_buff *skb,
  77                                   struct sw_flow_key *key)
  78{
  79        key->ct_state = 0;
  80        key->ct_zone = 0;
  81        key->ct.mark = 0;
  82        memset(&key->ct.labels, 0, sizeof(key->ct.labels));
  83        /* Clear 'ct_orig_proto' to mark the non-existence of original
  84         * direction key fields.
  85         */
  86        key->ct_orig_proto = 0;
  87}
  88
  89static inline int ovs_ct_put_key(const struct sw_flow_key *swkey,
  90                                 const struct sw_flow_key *output,
  91                                 struct sk_buff *skb)
  92{
  93        return 0;
  94}
  95
  96static inline void ovs_ct_free_action(const struct nlattr *a) { }
  97
  98#define CT_SUPPORTED_MASK 0
  99#endif /* CONFIG_NF_CONNTRACK */
 100
 101#if IS_ENABLED(CONFIG_NETFILTER_CONNCOUNT)
 102extern struct genl_family dp_ct_limit_genl_family;
 103#endif
 104#endif /* ovs_conntrack.h */
 105