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

source code of linux/net/openvswitch/conntrack.h