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
  11 struct ovs_conntrack_info;
  12 struct ovs_ct_limit_info;
  13 enum ovs_key_attr;
  14
  15 #if IS_ENABLED(CONFIG_NF_CONNTRACK)
  16 int ovs_ct_init(struct net *);
  17 void ovs_ct_exit(struct net *);
  18 bool ovs_ct_verify(struct net *, enum ovs_key_attr attr);
  19 int ovs_ct_copy_action(struct net *, const struct nlattr *,
  20                        const struct sw_flow_key *, struct sw_flow_actions **,
  21                        bool log);
  22 int ovs_ct_action_to_attr(const struct ovs_conntrack_info *, struct sk_buff *);
  23
  24 int ovs_ct_execute(struct net *, struct sk_buff *, struct sw_flow_key *,
  25                    const struct ovs_conntrack_info *);
  26 int ovs_ct_clear(struct sk_buff *skb, struct sw_flow_key *key);
  27
  28 void ovs_ct_fill_key(const struct sk_buff *skb, struct sw_flow_key *key,
  29                      bool post_ct);
  30 int ovs_ct_put_key(const struct sw_flow_key *swkey,
  31                    const struct sw_flow_key *output, struct sk_buff *skb);
  32 void 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
  41 static inline int ovs_ct_init(struct net *net) { return 0; }
  42
  43 static inline void ovs_ct_exit(struct net *net) { }
  44
  45 static inline bool ovs_ct_verify(struct net *net, int attr)
  46 {
  47         return false;
  48 }
  49
  50 static 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
  57 static inline int ovs_ct_action_to_attr(const struct ovs_conntrack_info *info,
  58                                         struct sk_buff *skb)
  59 {
  60         return -ENOTSUPP;
  61 }
  62
  63 static 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
  71 static inline int ovs_ct_clear(struct sk_buff *skb,
  72                                struct sw_flow_key *key)
  73 {
  74         return -ENOTSUPP;
  75 }
  76
  77 static 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
  91 static 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
  98 static 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)
 104 extern struct genl_family dp_ct_limit_genl_family;
 105 #endif
 106 #endif /* ovs_conntrack.h */