netfilter: add nf_ingress_hook() helper function

Add helper function to check if this is an ingress hook.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

diff --git a/net/netfilter/core.c b/net/netfilter/core.c
index b9ec8ec..c82f779 100644 (file)
--- a/net/netfilter/core.c
+++ b/net/netfilter/core.c
@@ -311,6 +311,11 @@ nf_hook_entry_head(struct net *net, int pf, unsigned int hooknum,
        return NULL;
 }
 
+static inline bool nf_ingress_hook(const struct nf_hook_ops *reg, int pf)
+{
+       return pf == NFPROTO_NETDEV && reg->hooknum == NF_NETDEV_INGRESS;
+}
+
 static void nf_static_key_inc(const struct nf_hook_ops *reg, int pf)
 {
 #ifdef CONFIG_JUMP_LABEL
@@ -359,7 +364,7 @@ static int __nf_register_net_hook(struct net *net, int pf,
 
        hooks_validate(new_hooks);
 #ifdef CONFIG_NETFILTER_INGRESS
-       if (pf == NFPROTO_NETDEV && reg->hooknum == NF_NETDEV_INGRESS)
+       if (nf_ingress_hook(reg, pf))
                net_inc_ingress_queue();
 #endif
        nf_static_key_inc(reg, pf);
@@ -416,7 +421,7 @@ static void __nf_unregister_net_hook(struct net *net, int pf,
 
        if (nf_remove_net_hook(p, reg)) {
 #ifdef CONFIG_NETFILTER_INGRESS
-               if (pf == NFPROTO_NETDEV && reg->hooknum == NF_NETDEV_INGRESS)
+               if (nf_ingress_hook(reg, pf))
                        net_dec_ingress_queue();
 #endif
                nf_static_key_dec(reg, pf);