Re: [PATCH 2/2] ipv4: Change rt->rt_iif encoding.

From: David Miller <davem@davemloft.net>
Date: Mon, 23 Jul 2012 14:07:37 -0700 (PDT)

On input packet processing, rt->rt_iif will be zero if we should
use skb->dev->ifindex.

Since we access rt->rt_iif consistently via inet_iif(), that is
the only spot whose interpretation have to adjust.

Signed-off-by: David S. Miller <davem@davemloft.net>

Julian, as you seem to have feared, this turns out to not work.

We zap the skb->dev apparently, so I'll need to come up with
a different scheme to handle this.