1/*
 2 * Copyright (c) 2015 Nicira, Inc.
 3 *
 4 * This program is free software; you can redistribute it and/or
 5 * modify it under the terms of version 2 of the GNU General Public
 6 * License as published by the Free Software Foundation.
 7 *
 8 * This program is distributed in the hope that it will be useful, but
 9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
12 */
13
14#ifndef OVS_CONNTRACK_H
15#define OVS_CONNTRACK_H 1
16
17#include "flow.h"
18
19struct ovs_conntrack_info;
20enum ovs_key_attr;
21
22#if IS_ENABLED(CONFIG_NF_CONNTRACK)
23void ovs_ct_init(struct net *);
24void ovs_ct_exit(struct net *);
25bool ovs_ct_verify(struct net *, enum ovs_key_attr attr);
26int ovs_ct_copy_action(struct net *, const struct nlattr *,
27		       const struct sw_flow_key *, struct sw_flow_actions **,
28		       bool log);
29int ovs_ct_action_to_attr(const struct ovs_conntrack_info *, struct sk_buff *);
30
31int ovs_ct_execute(struct net *, struct sk_buff *, struct sw_flow_key *,
32		   const struct ovs_conntrack_info *);
33
34void ovs_ct_fill_key(const struct sk_buff *skb, struct sw_flow_key *key);
35int ovs_ct_put_key(const struct sw_flow_key *key, struct sk_buff *skb);
36void ovs_ct_free_action(const struct nlattr *a);
37
38#define CT_SUPPORTED_MASK (OVS_CS_F_NEW | OVS_CS_F_ESTABLISHED | \
39			   OVS_CS_F_RELATED | OVS_CS_F_REPLY_DIR | \
40			   OVS_CS_F_INVALID | OVS_CS_F_TRACKED | \
41			   OVS_CS_F_SRC_NAT | OVS_CS_F_DST_NAT)
42#else
43#include <linux/errno.h>
44
45static inline void ovs_ct_init(struct net *net) { }
46
47static inline void ovs_ct_exit(struct net *net) { }
48
49static inline bool ovs_ct_verify(struct net *net, int attr)
50{
51	return false;
52}
53
54static inline int ovs_ct_copy_action(struct net *net, const struct nlattr *nla,
55				     const struct sw_flow_key *key,
56				     struct sw_flow_actions **acts, bool log)
57{
58	return -ENOTSUPP;
59}
60
61static inline int ovs_ct_action_to_attr(const struct ovs_conntrack_info *info,
62					struct sk_buff *skb)
63{
64	return -ENOTSUPP;
65}
66
67static inline int ovs_ct_execute(struct net *net, struct sk_buff *skb,
68				 struct sw_flow_key *key,
69				 const struct ovs_conntrack_info *info)
70{
71	kfree_skb(skb);
72	return -ENOTSUPP;
73}
74
75static inline void ovs_ct_fill_key(const struct sk_buff *skb,
76				   struct sw_flow_key *key)
77{
78	key->ct.state = 0;
79	key->ct.zone = 0;
80	key->ct.mark = 0;
81	memset(&key->ct.labels, 0, sizeof(key->ct.labels));
82}
83
84static inline int ovs_ct_put_key(const struct sw_flow_key *key,
85				 struct sk_buff *skb)
86{
87	return 0;
88}
89
90static inline void ovs_ct_free_action(const struct nlattr *a) { }
91
92#define CT_SUPPORTED_MASK 0
93#endif /* CONFIG_NF_CONNTRACK */
94#endif /* ovs_conntrack.h */