[patch 19/32] XFRM: Use output device disable_xfrm for forwarded packets

[Chris Wright <chrisw@sous-sol.org>]

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-stable review patch.  If anyone has any objections, please let us know.
------------------

From: Patrick McHardy <kaber@trash.net>

Currently the behaviour of disable_xfrm is inconsistent between
locally generated and forwarded packets. For locally generated
packets disable_xfrm disables the policy lookup if it is set on
the output device, for forwarded traffic however it looks at the
input device. This makes it impossible to disable xfrm on all
devices but a dummy device and use normal routing to direct
traffic to that device.

Always use the output device when checking disable_xfrm.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
---
commit 9be2b4e36fb04bbc968693ef95a75acc17cf2931
Author: Patrick McHardy <kaber@trash.net>
Date:   Mon Dec 4 19:59:00 2006 -0800

 net/ipv4/route.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- linux-2.6.19.orig/net/ipv4/route.c
+++ linux-2.6.19/net/ipv4/route.c
@@ -1784,7 +1784,7 @@ static inline int __mkroute_input(struct
 #endif
 	if (in_dev->cnf.no_policy)
 		rth->u.dst.flags |= DST_NOPOLICY;
-	if (in_dev->cnf.no_xfrm)
+	if (out_dev->cnf.no_xfrm)
 		rth->u.dst.flags |= DST_NOXFRM;
 	rth->fl.fl4_dst	= daddr;
 	rth->rt_dst	= daddr;

--