netdev - [PATCHv2 ipsec-next 05/10] ip_vti: support IPIP6 tunnel processing

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Message-Id: <b29f04cd51bc17c22e6d34714afb3e4c17137e95.1593502515.git.lucien.xin@gmail.com>
Date:   Tue, 30 Jun 2020 15:36:30 +0800
From:   Xin Long <lucien.xin@...il.com>
To:     netdev@...r.kernel.org
Cc:     Jakub Kicinski <jakub.kicinski@...ronome.com>,
        Steffen Klassert <steffen.klassert@...unet.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        Sabrina Dubroca <sd@...asysnail.net>
Subject: [PATCHv2 ipsec-next 05/10] ip_vti: support IPIP6 tunnel processing

For IPIP6 tunnel processing, the functions called will be the
same as that for IPIP tunnel's. So reuse it and register it
with family == AF_INET6.

Signed-off-by: Xin Long <lucien.xin@...il.com>
---
 net/ipv4/ip_vti.c | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/net/ipv4/ip_vti.c b/net/ipv4/ip_vti.c
index fd762d9..f0bd680 100644
--- a/net/ipv4/ip_vti.c
+++ b/net/ipv4/ip_vti.c
@@ -655,7 +655,12 @@ static int __init vti_init(void)
 	msg = "ipip tunnel";
 	err = xfrm4_tunnel_register(&vti_ipip_handler, AF_INET);
 	if (err < 0)
-		goto xfrm_tunnel_failed;
+		goto xfrm_tunnel_ipip_failed;
+#if IS_ENABLED(CONFIG_IPV6)
+	err = xfrm4_tunnel_register(&vti_ipip_handler, AF_INET6);
+	if (err < 0)
+		goto xfrm_tunnel_ipip6_failed;
+#endif
 
 	msg = "netlink interface";
 	err = rtnl_link_register(&vti_link_ops);
@@ -665,8 +670,12 @@ static int __init vti_init(void)
 	return err;
 
 rtnl_link_failed:
+#if IS_ENABLED(CONFIG_IPV6)
+	xfrm4_tunnel_deregister(&vti_ipip_handler, AF_INET6);
+xfrm_tunnel_ipip6_failed:
+#endif
 	xfrm4_tunnel_deregister(&vti_ipip_handler, AF_INET);
-xfrm_tunnel_failed:
+xfrm_tunnel_ipip_failed:
 	xfrm4_protocol_deregister(&vti_ipcomp4_protocol, IPPROTO_COMP);
 xfrm_proto_comp_failed:
 	xfrm4_protocol_deregister(&vti_ah4_protocol, IPPROTO_AH);
@@ -682,6 +691,9 @@ static int __init vti_init(void)
 static void __exit vti_fini(void)
 {
 	rtnl_link_unregister(&vti_link_ops);
+#if IS_ENABLED(CONFIG_IPV6)
+	xfrm4_tunnel_deregister(&vti_ipip_handler, AF_INET6);
+#endif
 	xfrm4_tunnel_deregister(&vti_ipip_handler, AF_INET);
 	xfrm4_protocol_deregister(&vti_ipcomp4_protocol, IPPROTO_COMP);
 	xfrm4_protocol_deregister(&vti_ah4_protocol, IPPROTO_AH);
-- 
2.1.0