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 int ovs_ct_put_key(const struct sw_flow_key *swkey,
  30                    const struct sw_flow_key *output, struct sk_buff *skb);
  31 void 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
  40 static inline int ovs_ct_init(struct net *net) { return 0; }
  41
  42 static inline void ovs_ct_exit(struct net *net) { }
  43
  44 static inline bool ovs_ct_verify(struct net *net, int attr)
  45 {
  46         return false;
  47 }
  48
  49 static 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
  56 static inline int ovs_ct_action_to_attr(const struct ovs_conntrack_info *info,
  57                                         struct sk_buff *skb)
  58 {
  59         return -ENOTSUPP;
  60 }
  61
  62 static 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
  70 static inline int ovs_ct_clear(struct sk_buff *skb,
  71                                struct sw_flow_key *key)
  72 {
  73         return -ENOTSUPP;
  74 }
  75
  76 static 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
  89 static 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
  96 static 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)
 102 extern struct genl_family dp_ct_limit_genl_family;
 103 #endif
 104 #endif /* ovs_conntrack.h */