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
ovs_ct_init(struct net * net)40 static inline int ovs_ct_init(struct net *net) { return 0; }
41
ovs_ct_exit(struct net * net)42 static inline void ovs_ct_exit(struct net *net) { }
43
ovs_ct_verify(struct net * net,int attr)44 static inline bool ovs_ct_verify(struct net *net, int attr)
45 {
46 return false;
47 }
48
ovs_ct_copy_action(struct net * net,const struct nlattr * nla,const struct sw_flow_key * key,struct sw_flow_actions ** acts,bool log)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
ovs_ct_action_to_attr(const struct ovs_conntrack_info * info,struct sk_buff * skb)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
ovs_ct_execute(struct net * net,struct sk_buff * skb,struct sw_flow_key * key,const struct ovs_conntrack_info * info)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
ovs_ct_clear(struct sk_buff * skb,struct sw_flow_key * key)70 static inline int ovs_ct_clear(struct sk_buff *skb,
71 struct sw_flow_key *key)
72 {
73 return -ENOTSUPP;
74 }
75
ovs_ct_fill_key(const struct sk_buff * skb,struct sw_flow_key * key)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
ovs_ct_put_key(const struct sw_flow_key * swkey,const struct sw_flow_key * output,struct sk_buff * skb)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
ovs_ct_free_action(const struct nlattr * a)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 */
105