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 "flow.h" 18 19 struct ovs_conntrack_info; 20 enum ovs_key_attr; 21 22 #if IS_ENABLED(CONFIG_NF_CONNTRACK) 23 void ovs_ct_init(struct net *); 24 void ovs_ct_exit(struct net *); 25 bool ovs_ct_verify(struct net *, enum ovs_key_attr attr); 26 int ovs_ct_copy_action(struct net *, const struct nlattr *, 27 const struct sw_flow_key *, struct sw_flow_actions **, 28 bool log); 29 int ovs_ct_action_to_attr(const struct ovs_conntrack_info *, struct sk_buff *); 30 31 int ovs_ct_execute(struct net *, struct sk_buff *, struct sw_flow_key *, 32 const struct ovs_conntrack_info *); 33 int ovs_ct_clear(struct sk_buff *skb, struct sw_flow_key *key); 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 int ovs_ct_clear(struct sk_buff *skb, 78 struct sw_flow_key *key) 79 { 80 return -ENOTSUPP; 81 } 82 83 static inline void ovs_ct_fill_key(const struct sk_buff *skb, 84 struct sw_flow_key *key) 85 { 86 key->ct_state = 0; 87 key->ct_zone = 0; 88 key->ct.mark = 0; 89 memset(&key->ct.labels, 0, sizeof(key->ct.labels)); 90 /* Clear 'ct_orig_proto' to mark the non-existence of original 91 * direction key fields. 92 */ 93 key->ct_orig_proto = 0; 94 } 95 96 static inline int ovs_ct_put_key(const struct sw_flow_key *swkey, 97 const struct sw_flow_key *output, 98 struct sk_buff *skb) 99 { 100 return 0; 101 } 102 103 static inline void ovs_ct_free_action(const struct nlattr *a) { } 104 105 #define CT_SUPPORTED_MASK 0 106 #endif /* CONFIG_NF_CONNTRACK */ 107 #endif /* ovs_conntrack.h */ 108