netdev - Re: [PATCH nf-next v9 5/8] openvswitch: Find existing conntrack entry after upcall.

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Message-ID: <CAPWQB7HjMfhpK5hGSCZ0B91QCqbrAxP4+obA1GQTbtBUwXi2zg@mail.gmail.com>
Date:	Wed, 9 Mar 2016 18:29:06 -0800
From:	Joe Stringer <joe@....org>
To:	Jarno Rajahalme <jarno@....org>
Cc:	netfilter-devel@...r.kernel.org, netdev <netdev@...r.kernel.org>,
	ovs dev <dev@...nvswitch.org>
Subject: Re: [PATCH nf-next v9 5/8] openvswitch: Find existing conntrack entry
 after upcall.

On 9 March 2016 at 15:10, Jarno Rajahalme <jarno@....org> wrote:
> Add a new function ovs_ct_find_existing() to find an existing
> conntrack entry for which this packet was already applied to.  This is
> only to be called when there is evidence that the packet was already
> tracked and committed, but we lost the ct reference due to an
> userspace upcall.
>
> ovs_ct_find_existing() is called from skb_nfct_cached(), which can now
> hide the fact that the ct reference may have been lost due to an
> upcall.  This allows ovs_ct_commit() to be simplified.
>
> This patch is needed by later "openvswitch: Interface with NAT" patch,
> as we need to be able to pass the packet through NAT using the
> original ct reference also after the reference is lost after an
> upcall.
>
> Signed-off-by: Jarno Rajahalme <jarno@....org>

Acked-by: Joe Stringer <joe@....org>