From: Steven Barth <cyrus@openwrt.org>
Date: Thu, 19 Mar 2015 15:16:04 +0000 (+0100)
Subject: ipv6: fix backtracking for throw routes
X-Git-Tag: v3.12.40~147
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7d5a6af313ac6c7a61657261f27bd72f547af306;p=thirdparty%2Fkernel%2Fstable.git

ipv6: fix backtracking for throw routes

[ Upstream commit 73ba57bfae4a1914f6a6dac71e3168dd900e00af ]

for throw routes to trigger evaluation of other policy rules
EAGAIN needs to be propagated up to fib_rules_lookup
similar to how its done for IPv4

A simple testcase for verification is:

ip -6 rule add lookup 33333 priority 33333
ip -6 route add throw 2001:db8::1
ip -6 route add 2001:db8::1 via fe80::1 dev wlan0 table 33333
ip route get 2001:db8::1

Signed-off-by: Steven Barth <cyrus@openwrt.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---

diff --git a/net/ipv6/fib6_rules.c b/net/ipv6/fib6_rules.c
index 3fd0a578329e5..ab82a47d0bdf2 100644
--- a/net/ipv6/fib6_rules.c
+++ b/net/ipv6/fib6_rules.c
@@ -104,6 +104,7 @@ static int fib6_rule_action(struct fib_rule *rule, struct flowi *flp,
 				goto again;
 			flp6->saddr = saddr;
 		}
+		err = rt->dst.error;
 		goto out;
 	}
 again: