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Date:   Fri, 8 Feb 2019 14:39:59 +0100
From:   Daniel Borkmann <>
To:     Florian Westphal <>
        Mahesh Bandewar <>,
        Martynas Pumputis <>
Subject: Re: [PATCH net-next] ipvlan: decouple l3s mode dependencies from
 other modes

On 02/08/2019 02:29 PM, Florian Westphal wrote:
> Daniel Borkmann <> 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.

Yep, agree, it doesn't work without it since inside ipvlan's nfhook
there is the final switch to the target ipvlan slave device. :)

> Acked-by: Florian Westphal <>


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