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git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - include/linux/netfilter_ingress.h
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
;
23 /* Must recheck the ingress hook head, in the event it became NULL
24 * after the check in nf_hook_ingress_active evaluated to true.
29 nf_hook_state_init(&state
, e
, NF_NETDEV_INGRESS
, INT_MIN
,
30 NFPROTO_NETDEV
, skb
->dev
, NULL
, NULL
,
31 dev_net(skb
->dev
), NULL
);
32 return nf_hook_slow(skb
, &state
);
35 static inline void nf_hook_ingress_init(struct net_device
*dev
)
37 RCU_INIT_POINTER(dev
->nf_hooks_ingress
, NULL
);
39 #else /* CONFIG_NETFILTER_INGRESS */
40 static inline int nf_hook_ingress_active(struct sk_buff
*skb
)
45 static inline int nf_hook_ingress(struct sk_buff
*skb
)
50 static inline void nf_hook_ingress_init(struct net_device
*dev
) {}
51 #endif /* CONFIG_NETFILTER_INGRESS */
52 #endif /* _NETFILTER_INGRESS_H_ */