[PATCH 06/10 net-next] l2tp: show IPv6 addresses in l2tp debugfs file

[James Chapman <jchapman@katalix.com>]

From: Chris Elston <celston@katalix.com>

If an L2TP tunnel uses IPv6, make sure the l2tp debugfs file shows the
IPv6 address correctly.

Signed-off-by: Chris Elston <celston@katalix.com>
Signed-off-by: James Chapman <jchapman@katalix.com>
---
 net/l2tp/l2tp_debugfs.c |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/net/l2tp/l2tp_debugfs.c b/net/l2tp/l2tp_debugfs.c
index 7613013..c0d57ba 100644
--- a/net/l2tp/l2tp_debugfs.c
+++ b/net/l2tp/l2tp_debugfs.c
@@ -122,6 +122,14 @@ static void l2tp_dfs_seq_tunnel_show(struct seq_file *m, void *v)
 	seq_printf(m, "\nTUNNEL %u peer %u", tunnel->tunnel_id, tunnel->peer_tunnel_id);
 	if (tunnel->sock) {
 		struct inet_sock *inet = inet_sk(tunnel->sock);
+
+#if IS_ENABLED(CONFIG_IPV6)
+		if (tunnel->sock->sk_family == AF_INET6) {
+			struct ipv6_pinfo *np = inet6_sk(tunnel->sock);
+			seq_printf(m, " from %pI6c to %pI6c\n",
+				&np->saddr, &np->daddr);
+		} else
+#endif
 		seq_printf(m, " from %pI4 to %pI4\n",
 			   &inet->inet_saddr, &inet->inet_daddr);
 		if (tunnel->encap == L2TP_ENCAPTYPE_UDP)
-- 
1.7.0.4