netdev - [PATCH] IPv6: RTM_GETROUTE: Add RTA

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Message-ID: <20201115105527.GA11569@tws>
Date:   Sun, 15 Nov 2020 11:55:27 +0100
From:   Oliver Herms <oliver.peter.herms@...il.com>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, kuznet@....inr.ac.ru, yoshfuji@...ux-ipv6.org,
        kuba@...nel.org
Subject: [PATCH] IPv6: RTM_GETROUTE: Add RTA_ENCAP to result

This patch adds an IPv6 routes encapsulation attribute
to the result of netlink RTM_GETROUTE requests
(e.g. ip route get 2001:db8::).

Signed-off-by: Oliver Herms <oliver.peter.herms@...il.com>
---
 net/ipv6/route.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 82cbb46a2a4f..4d45696a70eb 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -5489,6 +5489,11 @@ static int rt6_fill_node(struct net *net, struct sk_buff *skb,
 	rtm->rtm_scope = RT_SCOPE_UNIVERSE;
 	rtm->rtm_protocol = rt->fib6_protocol;
 
+	if (dst && dst->lwtstate &&
+	    lwtunnel_fill_encap(skb, dst->lwtstate, RTA_ENCAP, RTA_ENCAP_TYPE) < 0) {
+		goto nla_put_failure;
+	}
+
 	if (rt6_flags & RTF_CACHE)
 		rtm->rtm_flags |= RTM_F_CLONED;
 
-- 
2.25.1