Subject: Re: [PATCH nf] vrf: don't run conntrack on vrf with !dflt qdisc

From: Florian Westphal <[email-masked]>
Date: Fri, 26 Nov 2021 15:53:41 +0100

Nicolas Dichtel <[email-masked]> wrote:
> After the below patch, the conntrack attached to skb is set to "notrack" in
> the context of vrf device, for locally generated packets.
> But this is true only when the default qdisc is set to the vrf device. When
> changing the qdisc, notrack is not set anymore.
> In fact, there is a shortcut in the vrf driver, when the default qdisc is
> set, see commit dcdd43c41e60 ("net: vrf: performance improvements for
> IPv4") for more details.
> 
> This patch ensures that the behavior is always the same, whatever the qdisc
> is.
> 
> To demonstrate the difference, a new test is added in conntrack_vrf.sh.

Thanks Nicolas for the explanation & test case.

Acked-by: Florian Westphal <[email-masked]>