| 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 */ |