Subject: Re: [PATCH 5/5] netfilter: add netfilter ingress hook after handle_ing() under unique static key

From: Alexei Starovoitov <[email-masked]>
Date: Wed, 13 May 2015 09:59:46 -0700

On 5/13/15 9:19 AM, Pablo Neira Ayuso wrote:
> This patch adds the Netfilter ingress hook just after the existing tc ingress
> hook, that seems to be the consensus solution for this.

Looks good to me.
Acked-by: Alexei Starovoitov <[email-masked]>

> diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
> index 2b39235..6c256f8 100644
> --- a/include/linux/netdevice.h
> +++ b/include/linux/netdevice.h
> @@ -1659,6 +1659,9 @@ struct net_device {
>   	struct tcf_proto __rcu  *ingress_cl_list;
>   #endif
>   	struct netdev_queue __rcu *ingress_queue;
> +#ifdef CONFIG_NETFILTER_INGRESS
> +	struct list_head	nf_hooks_ingress;
> +#endif
...
> diff --git a/net/netfilter/Kconfig b/net/netfilter/Kconfig
> index f70e34a..db1c674 100644
> --- a/net/netfilter/Kconfig
> +++ b/net/netfilter/Kconfig
> @@ -1,6 +1,13 @@
>   menu "Core Netfilter Configuration"
>   	depends on NET && INET && NETFILTER
>
> +config NETFILTER_INGRESS
> +	bool "Netfilter ingress support"
> +	select NET_INGRESS
> +	help
> +	  This allows you to classify packets from ingress using the Netfilter
> +	  infrastructure.
> +

should be some default hint as well?
not sure why you want to do it under another config flag.
Just makes it harder to test all config combinations.
I think under global CONFIG_NETFILTER it would be fine as well.