netdev - [PATCH net-next v4 1/4] route: Set orig_output when redirecting to lwt on locally generated traffic

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Message-Id: <231e48734bb95fab30fb6c879ab858120cfb88ff.1480522144.git.tgraf@suug.ch>
Date:   Wed, 30 Nov 2016 17:10:08 +0100
From:   Thomas Graf <tgraf@...g.ch>
To:     davem@...emloft.net
Cc:     netdev@...r.kernel.org, alexei.starovoitov@...il.com,
        daniel@...earbox.net, tom@...bertland.com,
        roopa@...ulusnetworks.com, hannes@...essinduktion.org
Subject: [PATCH net-next v4 1/4] route: Set orig_output when redirecting to lwt on locally generated traffic

orig_output for IPv4 was only set for dsts which hit an input route.
Set it consistently for locally generated traffic as well to allow
lwt to continue the dst_output() path as configured by the nexthop.

Fixes: 2536862311d ("lwt: Add support to redirect dst.input")
Signed-off-by: Thomas Graf <tgraf@...g.ch>
---
 net/ipv4/route.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index d37fc6f..0c39b62 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -2154,8 +2154,10 @@ static struct rtable *__mkroute_output(const struct fib_result *res,
 	}
 
 	rt_set_nexthop(rth, fl4->daddr, res, fnhe, fi, type, 0);
-	if (lwtunnel_output_redirect(rth->dst.lwtstate))
+	if (lwtunnel_output_redirect(rth->dst.lwtstate)) {
+		rth->dst.lwtstate->orig_output = rth->dst.output;
 		rth->dst.output = lwtunnel_output;
+	}
 
 	return rth;
 }
-- 
2.7.4