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

[Xin Long]

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....@gmail.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