releases/4.9.140/revert-ipv6-set-rt6i_protocol-properly-in-the-route-when-it.patch

From 77588b6ecc641068053020368f20231bc2524989 Mon Sep 17 00:00:00 2001
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: Fri, 23 Nov 2018 12:42:42 +0100
Subject: Revert "ipv6: set rt6i_protocol properly in the route when it is installed"

From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

This reverts commit 23e983e27aaff6357bb851d91b593d83a9a6552c which is
commit b91d532928dff2141ea9c107c3e73104d9843767 upstream.

It breaks the Android networking test suite, which works fine with the
backported patch in 4.14.  So something must be off for 4.9 for this
patch, so just revert it.

Cc: Jianlin Shi <jishi@redhat.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Xin Long <lucien.xin@gmail.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 net/ipv6/route.c |   11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -2292,7 +2292,6 @@ static void rt6_do_redirect(struct dst_e
 	if (on_link)
 		nrt->rt6i_flags &= ~RTF_GATEWAY;
 
-	nrt->rt6i_protocol = RTPROT_REDIRECT;
 	nrt->rt6i_gateway = *(struct in6_addr *)neigh->primary_key;
 
 	if (ip6_ins_rt(nrt))
@@ -2397,7 +2396,6 @@ static struct rt6_info *rt6_add_route_in
 		.fc_dst_len	= prefixlen,
 		.fc_flags	= RTF_GATEWAY | RTF_ADDRCONF | RTF_ROUTEINFO |
 				  RTF_UP | RTF_PREF(pref),
-		.fc_protocol = RTPROT_RA,
 		.fc_nlinfo.portid = 0,
 		.fc_nlinfo.nlh = NULL,
 		.fc_nlinfo.nl_net = net,
@@ -2450,7 +2448,6 @@ struct rt6_info *rt6_add_dflt_router(con
 		.fc_ifindex	= dev->ifindex,
 		.fc_flags	= RTF_GATEWAY | RTF_ADDRCONF | RTF_DEFAULT |
 				  RTF_UP | RTF_EXPIRES | RTF_PREF(pref),
-		.fc_protocol = RTPROT_RA,
 		.fc_nlinfo.portid = 0,
 		.fc_nlinfo.nlh = NULL,
 		.fc_nlinfo.nl_net = dev_net(dev),
@@ -3247,6 +3244,14 @@ static int rt6_fill_node(struct net *net
 	}
 	rtm->rtm_scope = RT_SCOPE_UNIVERSE;
 	rtm->rtm_protocol = rt->rt6i_protocol;
+	if (rt->rt6i_flags & RTF_DYNAMIC)
+		rtm->rtm_protocol = RTPROT_REDIRECT;
+	else if (rt->rt6i_flags & RTF_ADDRCONF) {
+		if (rt->rt6i_flags & (RTF_DEFAULT | RTF_ROUTEINFO))
+			rtm->rtm_protocol = RTPROT_RA;
+		else
+			rtm->rtm_protocol = RTPROT_KERNEL;
+	}
 
 	if (rt->rt6i_flags & RTF_CACHE)
 		rtm->rtm_flags |= RTM_F_CLONED;