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>

1 files changed, 6 insertions, 0 deletions

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);
         }