netdev - Re: [PATCH 6/6] net: move qdisc ingress filtering on top of netfilter ingress hooks

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Date:	Wed, 29 Apr 2015 14:53:58 -0700
From:	Cong Wang <cwang@...pensource.com>
To:	Pablo Neira Ayuso <pablo@...filter.org>
Cc:	netfilter-devel@...r.kernel.org,
	David Miller <davem@...emloft.net>,
	netdev <netdev@...r.kernel.org>,
	Jamal Hadi Salim <jhs@...atatu.com>
Subject: Re: [PATCH 6/6] net: move qdisc ingress filtering on top of netfilter
 ingress hooks

On Wed, Apr 29, 2015 at 11:53 AM, Pablo Neira Ayuso <pablo@...filter.org> wrote:
> diff --git a/net/sched/Kconfig b/net/sched/Kconfig
> index 2274e72..23b57da 100644
> --- a/net/sched/Kconfig
> +++ b/net/sched/Kconfig
> @@ -312,6 +312,7 @@ config NET_SCH_PIE
>  config NET_SCH_INGRESS
>         tristate "Ingress Qdisc"
>         depends on NET_CLS_ACT
> +       select NETFILTER_INGRESS
>         ---help---
>           Say Y here if you want to use classifiers for incoming packets.
>           If unsure, say Y.


So now it impossible to compile ingress Qdics without netfilters...

(I know you moved them into net/core/, but still they are netfilter API's.)

Why do we have to mix different layers? IOW, why not just keep TC at L2
and netfilters at L3 even just w.r.t. API?
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