netdev - Re: [PATCH net-next] ipvlan: decouple l3s mode dependencies from other modes

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Date:   Fri, 8 Feb 2019 14:29:41 +0100
From:   Florian Westphal <fw@...len.de>
To:     Daniel Borkmann <daniel@...earbox.net>
Cc:     davem@...emloft.net, netdev@...r.kernel.org,
        Mahesh Bandewar <maheshb@...gle.com>,
        Florian Westphal <fw@...len.de>,
        Martynas Pumputis <m@...bda.lt>
Subject: Re: [PATCH net-next] ipvlan: decouple l3s mode dependencies from
 other modes

Daniel Borkmann <daniel@...earbox.net> wrote:
> Right now ipvlan has a hard dependency on CONFIG_NETFILTER and
> otherwise it cannot be built. However, the only ipvlan operation
> mode that actually depends on netfilter is l3s, everything else
> is independent of it. Break this hard dependency such that users
> are able to use ipvlan l3 mode on systems where netfilter is not
> compiled in.
> 
> Therefore, this adds a hidden CONFIG_IPVLAN_L3S bool which is
> defaulting to y when CONFIG_NETFILTER is set in order to retain
> existing behavior for l3s. All l3s related code is refactored
> into ipvlan_l3s.c that is compiled in when enabled.

IIRC L3S is only meaningful with netfilter anyway, so this
looks like a good thing to do.

Acked-by: Florian Westphal <fw@...len.de>