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 */
107
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