From: David Ahern <dsa@cumulusnetworks.com>
Date: Wed, 1 Feb 2017 00:51:37 +0000 (-0800)
Subject: net: ipv6: add NLM_F_APPEND in notifications when applicable
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=1f5e29ce7989eb75652774004b962ee1eb6e56ca;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

net: ipv6: add NLM_F_APPEND in notifications when applicable

IPv6 does not set the NLM_F_APPEND flag in notifications to signal that
a NEWROUTE is an append versus a new route or a replaced one. Add the
flag if the request has it.

Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c
index ef5485204522..febde6c112bf 100644
--- a/net/ipv6/ip6_fib.c
+++ b/net/ipv6/ip6_fib.c
@@ -746,6 +746,9 @@ static int fib6_add_rt2node(struct fib6_node *fn, struct rt6_info *rt,
 	u16 nlflags = NLM_F_EXCL;
 	int err;
 
+	if (info->nlh && (info->nlh->nlmsg_flags & NLM_F_APPEND))
+		nlflags |= NLM_F_APPEND;
+
 	ins = &fn->leaf;
 
 	for (iter = fn->leaf; iter; iter = iter->dst.rt6_next) {