include/net/tc_act/tc_ct.h

   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
  44 static inline uint16_t tcf_ct_zone(const struct tc_action *a)
  45 {
  46         return to_ct_params(a)->zone;
  47 }
  48
  49 static inline int tcf_ct_action(const struct tc_action *a)
  50 {
  51         return to_ct_params(a)->ct_action;
  52 }
  53
  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
  60 static inline uint16_t tcf_ct_zone(const struct tc_action *a) { return 0; }
  61 static inline int tcf_ct_action(const struct tc_action *a) { return 0; }
  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 void tcf_ct_flow_table_restore_skb(struct sk_buff *skb, unsigned long cookie);
  70 #else
  71 static inline void
  72 tcf_ct_flow_table_restore_skb(struct sk_buff *skb, unsigned long cookie) { }
  73 #endif
  74
  75 static inline bool is_tcf_ct(const struct tc_action *a)
  76 {
  77 #if defined(CONFIG_NET_CLS_ACT) && IS_ENABLED(CONFIG_NF_CONNTRACK)
  78         if (a->ops && a->ops->id == TCA_ID_CT)
  79                 return true;
  80 #endif
  81         return false;
  82 }
  83
  84 #endif /* __NET_TC_CT_H */