xref: /linux/include/net/tc_act/tc_ct.h (revision 7cd5af0e) 
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __NET_TC_CT_H
3 #define __NET_TC_CT_H
4 
5 #include <net/act_api.h>
6 #include <uapi/linux/tc_act/tc_ct.h>
7 
8 #if IS_ENABLED(CONFIG_NF_CONNTRACK)
9 #include <net/netfilter/nf_nat.h>
10 #include <net/netfilter/nf_conntrack_labels.h>
11 
12 struct tcf_ct_params {
13 	struct nf_conntrack_helper *helper;
14 	struct nf_conn *tmpl;
15 	u16 zone;
16 
17 	u32 mark;
18 	u32 mark_mask;
19 
20 	u32 labels[NF_CT_LABELS_MAX_SIZE / sizeof(u32)];
21 	u32 labels_mask[NF_CT_LABELS_MAX_SIZE / sizeof(u32)];
22 
23 	struct nf_nat_range2 range;
24 	bool ipv4_range;
25 	bool put_labels;
26 
27 	u16 ct_action;
28 
29 	struct rcu_head rcu;
30 
31 	struct tcf_ct_flow_table *ct_ft;
32 	struct nf_flowtable *nf_ft;
33 };
34 
35 struct tcf_ct {
36 	struct tc_action common;
37 	struct tcf_ct_params __rcu *params;
38 };
39 
40 #define to_ct(a) ((struct tcf_ct *)a)
41 #define to_ct_params(a)							\
42 	((struct tcf_ct_params *)					\
43 	 rcu_dereference_protected(to_ct(a)->params,			\
44 				   lockdep_is_held(&a->tcfa_lock)))
45 
tcf_ct_zone(const struct tc_action * a)46 static inline uint16_t tcf_ct_zone(const struct tc_action *a)
47 {
48 	return to_ct_params(a)->zone;
49 }
50 
tcf_ct_action(const struct tc_action * a)51 static inline int tcf_ct_action(const struct tc_action *a)
52 {
53 	return to_ct_params(a)->ct_action;
54 }
55 
tcf_ct_ft(const struct tc_action * a)56 static inline struct nf_flowtable *tcf_ct_ft(const struct tc_action *a)
57 {
58 	return to_ct_params(a)->nf_ft;
59 }
60 
tcf_ct_helper(const struct tc_action * a)61 static inline struct nf_conntrack_helper *tcf_ct_helper(const struct tc_action *a)
62 {
63 	return to_ct_params(a)->helper;
64 }
65 
66 #else
tcf_ct_zone(const struct tc_action * a)67 static inline uint16_t tcf_ct_zone(const struct tc_action *a) { return 0; }
tcf_ct_action(const struct tc_action * a)68 static inline int tcf_ct_action(const struct tc_action *a) { return 0; }
tcf_ct_ft(const struct tc_action * a)69 static inline struct nf_flowtable *tcf_ct_ft(const struct tc_action *a)
70 {
71 	return NULL;
72 }
tcf_ct_helper(const struct tc_action * a)73 static inline struct nf_conntrack_helper *tcf_ct_helper(const struct tc_action *a)
74 {
75 	return NULL;
76 }
77 #endif /* CONFIG_NF_CONNTRACK */
78 
79 #if IS_ENABLED(CONFIG_NET_ACT_CT)
80 static inline void
tcf_ct_flow_table_restore_skb(struct sk_buff * skb,unsigned long cookie)81 tcf_ct_flow_table_restore_skb(struct sk_buff *skb, unsigned long cookie)
82 {
83 	enum ip_conntrack_info ctinfo = cookie & NFCT_INFOMASK;
84 	struct nf_conn *ct;
85 
86 	ct = (struct nf_conn *)(cookie & NFCT_PTRMASK);
87 	nf_conntrack_get(&ct->ct_general);
88 	nf_ct_set(skb, ct, ctinfo);
89 }
90 #else
91 static inline void
tcf_ct_flow_table_restore_skb(struct sk_buff * skb,unsigned long cookie)92 tcf_ct_flow_table_restore_skb(struct sk_buff *skb, unsigned long cookie) { }
93 #endif
94 
is_tcf_ct(const struct tc_action * a)95 static inline bool is_tcf_ct(const struct tc_action *a)
96 {
97 #if defined(CONFIG_NET_CLS_ACT) && IS_ENABLED(CONFIG_NF_CONNTRACK)
98 	if (a->ops && a->ops->id == TCA_ID_CT)
99 		return true;
100 #endif
101 	return false;
102 }
103 
104 #endif /* __NET_TC_CT_H */
105