netdev - Re: [PATCH v2 net-next 2/2] vrf: run conntrack only in context of lower/physdev for locally generated packets

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Message-ID: <20211026125858.GA18032@breakpoint.cc>
Date:   Tue, 26 Oct 2021 14:58:58 +0200
From:   Florian Westphal <fw@...len.de>
To:     Pablo Neira Ayuso <pablo@...filter.org>
Cc:     Florian Westphal <fw@...len.de>, netdev@...r.kernel.org,
        netfilter-devel@...r.kernel.org, lschlesinger@...venets.com,
        dsahern@...nel.org, crosser@...rage.org
Subject: Re: [PATCH v2 net-next 2/2] vrf: run conntrack only in context of
 lower/physdev for locally generated packets

Pablo Neira Ayuso <pablo@...filter.org> wrote:
> If the motion for these hooks in the driver is to match for 'oif vrf',
> now that there is an egress hook, it might make more sense to filter
> from there based on the interface rather than adding these hook calls
> from the vrf driver?
> 
> I wonder if, in the future, it makes sense to entirely disable these
> hooks in the vrf driver and rely on egress hook?

Agree, it would be better to support ingress+egress hhoks from vrf
so vrf specific filtering can be done per-device.

I don't think we can just remove the existing NF_HOOK()s in vrf though.

We could add toggles to disable them, but I'm not sure how to best
expose that (ip link attribute, ethtool, sysctl ...)...?