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