From: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Date: Thu, 7 Apr 2011 21:04:08 +0000 (-0700)
Subject: ipv4: Fix "Set rt->rt_iif more sanely on output routes."
X-Git-Tag: v2.6.39-rc3~6^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1b86a58f9d7ce4fe2377687f378fbfb53bdc9b6c;p=pandora-kernel.git

ipv4: Fix "Set rt->rt_iif more sanely on output routes."

Commit 1018b5c01636c7c6bda31a719bda34fc631db29a ("Set rt->rt_iif more
sanely on output routes.")  breaks rt_is_{output,input}_route.

This became the cause to return "IP_PKTINFO's ->ipi_ifindex == 0".

To fix it, this does:

1) Add "int rt_route_iif;" to struct rtable

2) For input routes, always set rt_route_iif to same value as rt_iif

3) For output routes, always set rt_route_iif to zero.  Set rt_iif
   as it is done currently.

4) Change rt_is_{output,input}_route() to test rt_route_iif

Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>
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