1 #ifndef _NETFILTER_INGRESS_H_
2 #define _NETFILTER_INGRESS_H_
4 #include <linux/netfilter.h>
5 #include <linux/netdevice.h>
7 #ifdef CONFIG_NETFILTER_INGRESS
8 static inline bool nf_hook_ingress_active(const struct sk_buff *skb)
10 #ifdef HAVE_JUMP_LABEL
11 if (!static_key_false(&nf_hooks_needed[NFPROTO_NETDEV][NF_NETDEV_INGRESS]))
14 return rcu_access_pointer(skb->dev->nf_hooks_ingress);
17 /* caller must hold rcu_read_lock */
18 static inline int nf_hook_ingress(struct sk_buff *skb)
20 struct nf_hook_entry *e = rcu_dereference(skb->dev->nf_hooks_ingress);
21 struct nf_hook_state state;
24 /* Must recheck the ingress hook head, in the event it became NULL
25 * after the check in nf_hook_ingress_active evaluated to true.
30 nf_hook_state_init(&state, NF_NETDEV_INGRESS,
31 NFPROTO_NETDEV, skb->dev, NULL, NULL,
32 dev_net(skb->dev), NULL);
33 ret = nf_hook_slow(skb, &state, e);
40 static inline void nf_hook_ingress_init(struct net_device *dev)
42 RCU_INIT_POINTER(dev->nf_hooks_ingress, NULL);
44 #else /* CONFIG_NETFILTER_INGRESS */
45 static inline int nf_hook_ingress_active(struct sk_buff *skb)
50 static inline int nf_hook_ingress(struct sk_buff *skb)
55 static inline void nf_hook_ingress_init(struct net_device *dev) {}
56 #endif /* CONFIG_NETFILTER_INGRESS */
57 #endif /* _NETFILTER_INGRESS_H_ */