[IPSEC]: Changing API of xfrm4_tunnel_register.

This patch changes xfrm4_tunnel register and deregister
interface to prepare for solving the conflict of device
tunnels with inter address family IPsec tunnel.

Signed-off-by: Kazunori MIYAZAWA <miyazawa@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 25 insertions, 4 deletions

diff --git a/net/ipv4/xfrm4_tunnel.c b/net/ipv4/xfrm4_tunnel.c
index 1be6762b2d47..3eef06454da9 100644
--- a/net/ipv4/xfrm4_tunnel.c
+++ b/net/ipv4/xfrm4_tunnel.c
@@ -64,24 +64,45 @@ static struct xfrm_tunnel xfrm_tunnel_handler = {
         .priority       =       2,
 };
 
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+static struct xfrm_tunnel xfrm64_tunnel_handler = {
+        .handler        =       xfrm4_rcv,
+        .err_handler    =       xfrm_tunnel_err,
+        .priority       =       2,
+};
+#endif
+
 static int __init ipip_init(void)
 {
         if (xfrm_register_type(&ipip_type, AF_INET) < 0) {
                 printk(KERN_INFO "ipip init: can't add xfrm type\n");
                 return -EAGAIN;
         }
-        if (xfrm4_tunnel_register(&xfrm_tunnel_handler)) {
-                printk(KERN_INFO "ipip init: can't add xfrm handler\n");
+
+        if (xfrm4_tunnel_register(&xfrm_tunnel_handler, AF_INET)) {
+                printk(KERN_INFO "ipip init: can't add xfrm handler for AF_INET\n");
+                xfrm_unregister_type(&ipip_type, AF_INET);
+                return -EAGAIN;
+        }
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+        if (xfrm4_tunnel_register(&xfrm64_tunnel_handler, AF_INET6)) {
+                printk(KERN_INFO "ipip init: can't add xfrm handler for AF_INET6\n");
+                xfrm4_tunnel_deregister(&xfrm_tunnel_handler, AF_INET);
                 xfrm_unregister_type(&ipip_type, AF_INET);
                 return -EAGAIN;
         }
+#endif
         return 0;
 }
 
 static void __exit ipip_fini(void)
 {
-        if (xfrm4_tunnel_deregister(&xfrm_tunnel_handler))
-                printk(KERN_INFO "ipip close: can't remove xfrm handler\n");
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+        if (xfrm4_tunnel_deregister(&xfrm64_tunnel_handler, AF_INET6))
+                printk(KERN_INFO "ipip close: can't remove xfrm handler for AF_INET6\n");
+#endif
+        if (xfrm4_tunnel_deregister(&xfrm_tunnel_handler, AF_INET))
+                printk(KERN_INFO "ipip close: can't remove xfrm handler for AF_INET\n");
         if (xfrm_unregister_type(&ipip_type, AF_INET) < 0)
                 printk(KERN_INFO "ipip close: can't remove xfrm type\n");
 }