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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 | int ovs_ct_clear(struct sk_buff *skb, struct sw_flow_key *key); | |
35 | ||
36 | void ovs_ct_fill_key(const struct sk_buff *skb, struct sw_flow_key *key); | |
37 | int ovs_ct_put_key(const struct sw_flow_key *swkey, | |
38 | const struct sw_flow_key *output, struct sk_buff *skb); | |
39 | void ovs_ct_free_action(const struct nlattr *a); | |
40 | ||
41 | #define CT_SUPPORTED_MASK (OVS_CS_F_NEW | OVS_CS_F_ESTABLISHED | \ | |
42 | OVS_CS_F_RELATED | OVS_CS_F_REPLY_DIR | \ | |
43 | OVS_CS_F_INVALID | OVS_CS_F_TRACKED | \ | |
44 | OVS_CS_F_SRC_NAT | OVS_CS_F_DST_NAT) | |
45 | #else | |
46 | #include <linux/errno.h> | |
47 | ||
48 | static inline void ovs_ct_init(struct net *net) { } | |
49 | ||
50 | static inline void ovs_ct_exit(struct net *net) { } | |
51 | ||
52 | static inline bool ovs_ct_verify(struct net *net, int attr) | |
53 | { | |
54 | return false; | |
55 | } | |
56 | ||
57 | static inline int ovs_ct_copy_action(struct net *net, const struct nlattr *nla, | |
58 | const struct sw_flow_key *key, | |
59 | struct sw_flow_actions **acts, bool log) | |
60 | { | |
61 | return -ENOTSUPP; | |
62 | } | |
63 | ||
64 | static inline int ovs_ct_action_to_attr(const struct ovs_conntrack_info *info, | |
65 | struct sk_buff *skb) | |
66 | { | |
67 | return -ENOTSUPP; | |
68 | } | |
69 | ||
70 | static inline int ovs_ct_execute(struct net *net, struct sk_buff *skb, | |
71 | struct sw_flow_key *key, | |
72 | const struct ovs_conntrack_info *info) | |
73 | { | |
74 | kfree_skb(skb); | |
75 | return -ENOTSUPP; | |
76 | } | |
77 | ||
78 | static inline int ovs_ct_clear(struct sk_buff *skb, | |
79 | struct sw_flow_key *key) | |
80 | { | |
81 | return -ENOTSUPP; | |
82 | } | |
83 | ||
84 | static inline void ovs_ct_fill_key(const struct sk_buff *skb, | |
85 | struct sw_flow_key *key) | |
86 | { | |
87 | key->ct_state = 0; | |
88 | key->ct_zone = 0; | |
89 | key->ct.mark = 0; | |
90 | memset(&key->ct.labels, 0, sizeof(key->ct.labels)); | |
91 | /* Clear 'ct_orig_proto' to mark the non-existence of original | |
92 | * direction key fields. | |
93 | */ | |
94 | key->ct_orig_proto = 0; | |
95 | } | |
96 | ||
97 | static inline int ovs_ct_put_key(const struct sw_flow_key *swkey, | |
98 | const struct sw_flow_key *output, | |
99 | struct sk_buff *skb) | |
100 | { | |
101 | return 0; | |
102 | } | |
103 | ||
104 | static inline void ovs_ct_free_action(const struct nlattr *a) { } | |
105 | ||
106 | #define CT_SUPPORTED_MASK 0 | |
107 | #endif | |
108 | #endif /* ovs_conntrack.h */ |