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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 <linux/version.h> | |
18 | #include "flow.h" | |
19 | ||
20 | struct ovs_conntrack_info; | |
21 | enum ovs_key_attr; | |
22 | ||
23 | #if IS_ENABLED(CONFIG_NF_CONNTRACK) | |
24 | void ovs_ct_init(struct net *); | |
25 | void ovs_ct_exit(struct net *); | |
26 | bool ovs_ct_verify(struct net *, enum ovs_key_attr attr); | |
27 | int ovs_ct_copy_action(struct net *, const struct nlattr *, | |
28 | const struct sw_flow_key *, struct sw_flow_actions **, | |
29 | bool log); | |
30 | int ovs_ct_action_to_attr(const struct ovs_conntrack_info *, struct sk_buff *); | |
31 | ||
32 | int ovs_ct_execute(struct net *, struct sk_buff *, struct sw_flow_key *, | |
33 | const struct ovs_conntrack_info *); | |
34 | ||
35 | void ovs_ct_fill_key(const struct sk_buff *skb, struct sw_flow_key *key); | |
36 | int ovs_ct_put_key(const struct sw_flow_key *swkey, | |
37 | const struct sw_flow_key *output, struct sk_buff *skb); | |
38 | void ovs_ct_free_action(const struct nlattr *a); | |
39 | ||
40 | #define CT_SUPPORTED_MASK (OVS_CS_F_NEW | OVS_CS_F_ESTABLISHED | \ | |
41 | OVS_CS_F_RELATED | OVS_CS_F_REPLY_DIR | \ | |
42 | OVS_CS_F_INVALID | OVS_CS_F_TRACKED | \ | |
43 | OVS_CS_F_SRC_NAT | OVS_CS_F_DST_NAT) | |
44 | #else | |
45 | #include <linux/errno.h> | |
46 | ||
47 | static inline void ovs_ct_init(struct net *net) { } | |
48 | ||
49 | static inline void ovs_ct_exit(struct net *net) { } | |
50 | ||
51 | static inline bool ovs_ct_verify(struct net *net, int attr) | |
52 | { | |
53 | return false; | |
54 | } | |
55 | ||
56 | static inline int ovs_ct_copy_action(struct net *net, const struct nlattr *nla, | |
57 | const struct sw_flow_key *key, | |
58 | struct sw_flow_actions **acts, bool log) | |
59 | { | |
60 | return -ENOTSUPP; | |
61 | } | |
62 | ||
63 | static inline int ovs_ct_action_to_attr(const struct ovs_conntrack_info *info, | |
64 | struct sk_buff *skb) | |
65 | { | |
66 | return -ENOTSUPP; | |
67 | } | |
68 | ||
69 | static inline int ovs_ct_execute(struct net *net, struct sk_buff *skb, | |
70 | struct sw_flow_key *key, | |
71 | const struct ovs_conntrack_info *info) | |
72 | { | |
73 | kfree_skb(skb); | |
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 | { | |
80 | key->ct.state = 0; | |
81 | key->ct.zone = 0; | |
82 | key->ct.mark = 0; | |
83 | memset(&key->ct.labels, 0, sizeof(key->ct.labels)); | |
84 | /* Clear 'ct.orig_proto' to mark the non-existence of original | |
85 | * direction key fields. | |
86 | */ | |
87 | key->ct.orig_proto = 0; | |
88 | } | |
89 | ||
90 | static inline int ovs_ct_put_key(const struct sw_flow_key *swkey, | |
91 | const struct sw_flow_key *output, | |
92 | struct sk_buff *skb) | |
93 | { | |
94 | return 0; | |
95 | } | |
96 | ||
97 | static inline void ovs_ct_free_action(const struct nlattr *a) { } | |
98 | ||
99 | #define CT_SUPPORTED_MASK 0 | |
100 | #endif | |
101 | #endif /* ovs_conntrack.h */ |