On Fri, 6 Nov 2020 08:30:30 +0100 Martin Willi wrote:
> VRF devices use an optimized direct path on output if a default qdisc
> is involved, calling Netfilter hooks directly. This path, however, does
> not consider Netfilter rules completing asynchronously, such as with
> NFQUEUE. The Netfilter okfn() is called for asynchronously accepted
> packets, but the VRF never passes that packet down the stack to send
> it out over the slave device. Using the slower redirect path for this
> seems not feasible, as we do not know beforehand if a Netfilter hook
> has asynchronously completing rules.
>
> Fix the use of asynchronously completing Netfilter rules in OUTPUT and
> POSTROUTING by using a special completion function that additionally
> calls dst_output() to pass the packet down the stack. Also, slightly
> adjust the use of nf_reset_ct() so that is called in the asynchronous
> case, too.
>
> Fixes: dcdd43c41e60 ("net: vrf: performance improvements for IPv4")
> Fixes: a9ec54d1b0cd ("net: vrf: performance improvements for IPv6")
> Signed-off-by: Martin Willi <martin@xxxxxxxxxxxxxx>
David, can we get an ack?
