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net: add CONFIG_NET_INGRESS to enable ingress filtering

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This new config switch enables the ingress filtering infrastructure that is
controlled through the ingress_needed static key. This prepares the
introduction of the Netfilter ingress hook that resides under this unique
static key.

Note that CONFIG_SCH_INGRESS automatically selects this, that should be no
problem since this also depends on CONFIG_NET_CLS_ACT.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Acked-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pablo Neira 2015-05-13 18:19:37 +02:00 • committed by David S. Miller
parent b8d0aad0c7
commit 1cf51900f8
4 changed files with 9 additions and 4 deletions
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7
net/core/dev.c
View file

@ -1630,7 +1630,7 @@ int call_netdevice_notifiers(unsigned long val, struct net_device *dev)
}
EXPORT_SYMBOL(call_netdevice_notifiers);
#ifdef CONFIG_NET_CLS_ACT
#ifdef CONFIG_NET_INGRESS
static struct static_key ingress_needed __read_mostly;
void net_inc_ingress_queue(void)
@ -3798,13 +3798,14 @@ another_round:
}
skip_taps:
#ifdef CONFIG_NET_CLS_ACT
#ifdef CONFIG_NET_INGRESS
if (static_key_false(&ingress_needed)) {
skb = handle_ing(skb, &pt_prev, &ret, orig_dev);
if (!skb)
goto unlock;
}
#endif
#ifdef CONFIG_NET_CLS_ACT
skb->tc_verd = 0;
ncls:
#endif