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: v4.14-rc1~5729^2~6
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=73ba57bfae4a1914f6a6dac71e3168dd900e00af;p=platform%2Fkernel%2Flinux-rpi.git

ipv6: fix backtracking for throw routes

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>
---

diff --git a/net/ipv6/fib6_rules.c b/net/ipv6/fib6_rules.c
index b4d5e1d97c1b..27ca79682efb 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: