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_conn *tmpl;
14 	u16 zone;
15 
16 	u32 mark;
17 	u32 mark_mask;
18 
19 	u32 labels[NF_CT_LABELS_MAX_SIZE / sizeof(u32)];
20 	u32 labels_mask[NF_CT_LABELS_MAX_SIZE / sizeof(u32)];
21 
22 	struct nf_nat_range2 range;
23 	bool ipv4_range;
24 
25 	u16 ct_action;
26 
27 	struct rcu_head rcu;
28 
29 	struct tcf_ct_flow_table *ct_ft;
30 	struct nf_flowtable *nf_ft;
31 };
32 
33 struct tcf_ct {
34 	struct tc_action common;
35 	struct tcf_ct_params __rcu *params;
36 };
37 
38 #define to_ct(a) ((struct tcf_ct *)a)
39 #define to_ct_params(a)							\
40 	((struct tcf_ct_params *)					\
41 	 rcu_dereference_protected(to_ct(a)->params,			\
42 				   lockdep_is_held(&a->tcfa_lock)))
43 
tcf_ct_zone(const struct tc_action * a)44 static inline uint16_t tcf_ct_zone(const struct tc_action *a)
45 {
46 	return to_ct_params(a)->zone;
47 }
48 
tcf_ct_action(const struct tc_action * a)49 static inline int tcf_ct_action(const struct tc_action *a)
50 {
51 	return to_ct_params(a)->ct_action;
52 }
53 
tcf_ct_ft(const struct tc_action * a)54 static inline struct nf_flowtable *tcf_ct_ft(const struct tc_action *a)
55 {
56 	return to_ct_params(a)->nf_ft;
57 }
58 
59 #else
tcf_ct_zone(const struct tc_action * a)60 static inline uint16_t tcf_ct_zone(const struct tc_action *a) { return 0; }
tcf_ct_action(const struct tc_action * a)61 static inline int tcf_ct_action(const struct tc_action *a) { return 0; }
tcf_ct_ft(const struct tc_action * a)62 static inline struct nf_flowtable *tcf_ct_ft(const struct tc_action *a)
63 {
64 	return NULL;
65 }
66 #endif /* CONFIG_NF_CONNTRACK */
67 
68 #if IS_ENABLED(CONFIG_NET_ACT_CT)
69 static inline void
tcf_ct_flow_table_restore_skb(struct sk_buff * skb,unsigned long cookie)70 tcf_ct_flow_table_restore_skb(struct sk_buff *skb, unsigned long cookie)
71 {
72 	enum ip_conntrack_info ctinfo = cookie & NFCT_INFOMASK;
73 	struct nf_conn *ct;
74 
75 	ct = (struct nf_conn *)(cookie & NFCT_PTRMASK);
76 	nf_conntrack_get(&ct->ct_general);
77 	nf_ct_set(skb, ct, ctinfo);
78 }
79 #else
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 #endif
83 
is_tcf_ct(const struct tc_action * a)84 static inline bool is_tcf_ct(const struct tc_action *a)
85 {
86 #if defined(CONFIG_NET_CLS_ACT) && IS_ENABLED(CONFIG_NF_CONNTRACK)
87 	if (a->ops && a->ops->id == TCA_ID_CT)
88 		return true;
89 #endif
90 	return false;
91 }
92 
93 #endif /* __NET_TC_CT_H */
94