xref: /openbmc/linux/include/net/tc_act/tc_ct.h (revision 0a7c9d1f) 
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 
26 	u16 ct_action;
27 
28 	struct rcu_head rcu;
29 
30 	struct tcf_ct_flow_table *ct_ft;
31 	struct nf_flowtable *nf_ft;
32 };
33 
34 struct tcf_ct {
35 	struct tc_action common;
36 	struct tcf_ct_params __rcu *params;
37 };
38 
39 #define to_ct(a) ((struct tcf_ct *)a)
40 #define to_ct_params(a)							\
41 	((struct tcf_ct_params *)					\
42 	 rcu_dereference_protected(to_ct(a)->params,			\
43 				   lockdep_is_held(&a->tcfa_lock)))
44 
tcf_ct_zone(const struct tc_action * a)45 static inline uint16_t tcf_ct_zone(const struct tc_action *a)
46 {
47 	return to_ct_params(a)->zone;
48 }
49 
tcf_ct_action(const struct tc_action * a)50 static inline int tcf_ct_action(const struct tc_action *a)
51 {
52 	return to_ct_params(a)->ct_action;
53 }
54 
tcf_ct_ft(const struct tc_action * a)55 static inline struct nf_flowtable *tcf_ct_ft(const struct tc_action *a)
56 {
57 	return to_ct_params(a)->nf_ft;
58 }
59 
tcf_ct_helper(const struct tc_action * a)60 static inline struct nf_conntrack_helper *tcf_ct_helper(const struct tc_action *a)
61 {
62 	return to_ct_params(a)->helper;
63 }
64 
65 #else
tcf_ct_zone(const struct tc_action * a)66 static inline uint16_t tcf_ct_zone(const struct tc_action *a) { return 0; }
tcf_ct_action(const struct tc_action * a)67 static inline int tcf_ct_action(const struct tc_action *a) { return 0; }
tcf_ct_ft(const struct tc_action * a)68 static inline struct nf_flowtable *tcf_ct_ft(const struct tc_action *a)
69 {
70 	return NULL;
71 }
tcf_ct_helper(const struct tc_action * a)72 static inline struct nf_conntrack_helper *tcf_ct_helper(const struct tc_action *a)
73 {
74 	return NULL;
75 }
76 #endif /* CONFIG_NF_CONNTRACK */
77 
78 #if IS_ENABLED(CONFIG_NET_ACT_CT)
79 static inline void
tcf_ct_flow_table_restore_skb(struct sk_buff * skb,unsigned long cookie)80 tcf_ct_flow_table_restore_skb(struct sk_buff *skb, unsigned long cookie)
81 {
82 	enum ip_conntrack_info ctinfo = cookie & NFCT_INFOMASK;
83 	struct nf_conn *ct;
84 
85 	ct = (struct nf_conn *)(cookie & NFCT_PTRMASK);
86 	nf_conntrack_get(&ct->ct_general);
87 	nf_ct_set(skb, ct, ctinfo);
88 }
89 #else
90 static inline void
tcf_ct_flow_table_restore_skb(struct sk_buff * skb,unsigned long cookie)91 tcf_ct_flow_table_restore_skb(struct sk_buff *skb, unsigned long cookie) { }
92 #endif
93 
is_tcf_ct(const struct tc_action * a)94 static inline bool is_tcf_ct(const struct tc_action *a)
95 {
96 #if defined(CONFIG_NET_CLS_ACT) && IS_ENABLED(CONFIG_NF_CONNTRACK)
97 	if (a->ops && a->ops->id == TCA_ID_CT)
98 		return true;
99 #endif
100 	return false;
101 }
102 
103 #endif /* __NET_TC_CT_H */
104