netdev - [PATCH v3] IPv6: RTM_GETROUTE: Add RTA

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Message-ID: <20201118151436.GA420026@tws>
Date:   Wed, 18 Nov 2020 16:14:36 +0100
From:   Oliver Herms <oliver.peter.herms@...il.com>
To:     netdev@...r.kernel.org
Cc:     dsahern@...il.com, davem@...emloft.net, kuznet@....inr.ac.ru,
        yoshfuji@...ux-ipv6.org, kuba@...nel.org
Subject: [PATCH v3] IPv6: RTM_GETROUTE: Add RTA_ENCAP to result

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

Signed-off-by: Oliver Herms <oliver.peter.herms@...il.com>
---
 net/ipv6/route.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 7e0ce7af8234..64bda402357b 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -5558,6 +5558,10 @@ static int rt6_fill_node(struct net *net, struct sk_buff *skb,
 
 		if (dst->dev && nla_put_u32(skb, RTA_OIF, dst->dev->ifindex))
 			goto nla_put_failure;
+
+		if (dst && dst->lwtstate &&
+		    lwtunnel_fill_encap(skb, dst->lwtstate, RTA_ENCAP, RTA_ENCAP_TYPE) < 0)
+			goto nla_put_failure;
 	} else if (rt->fib6_nsiblings) {
 		struct fib6_info *sibling, *next_sibling;
 		struct nlattr *mp;
-- 
2.25.1