From: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Date: Thu, 1 Nov 2012 22:58:22 +0000 (+0000)
Subject: ipv6/multipath: remove flag NLM_F_EXCL after the first nexthop
X-Git-Tag: firefly_0821_release~3680^2~1480^2~467
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=1a72418bd7f0edcb85c817964efd370254fe749d;p=firefly-linux-kernel-4.4.55.git

ipv6/multipath: remove flag NLM_F_EXCL after the first nexthop

fib6_add_rt2node() will reject the nexthop if this flag is set, so
we perform the check only for the first nexthop.

Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index c42650cf8d4d..9c7b5d800495 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -2449,6 +2449,12 @@ beginning:
 				goto beginning;
 			}
 		}
+		/* Because each route is added like a single route we remove
+		 * this flag after the first nexthop (if there is a collision,
+		 * we have already fail to add the first nexthop:
+		 * fib6_add_rt2node() has reject it).
+		 */
+		cfg->fc_nlinfo.nlh->nlmsg_flags &= ~NLM_F_EXCL;
 		rtnh = rtnh_next(rtnh, &remaining);
 	}