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