Merge branch 'topic/ioctl-use-define' into for-linus

[sfrench/cifs-2.6.git] / net / ipv6 / af_inet6.c

diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index c802bc1658a854bc2599c6821fe6bfb4b5998870..9c8309ed35cf32351517af43ad647f16442cd9e9 100644 (file)
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -72,6 +72,10 @@ MODULE_LICENSE("GPL");
 static struct list_head inetsw6[SOCK_MAX];
 static DEFINE_SPINLOCK(inetsw6_lock);
 
+static int disable_ipv6 = 0;
+module_param_named(disable, disable_ipv6, int, 0);
+MODULE_PARM_DESC(disable, "Disable IPv6 such that it is non-functional");
+
 static __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk)
 {
        const int offset = sk->sk_prot->obj_size - sizeof(struct ipv6_pinfo);
@@ -991,10 +995,21 @@ static int __init inet6_init(void)
 {
        struct sk_buff *dummy_skb;
        struct list_head *r;
-       int err;
+       int err = 0;
 
        BUILD_BUG_ON(sizeof(struct inet6_skb_parm) > sizeof(dummy_skb->cb));
 
+       /* Register the socket-side information for inet6_create.  */
+       for(r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r)
+               INIT_LIST_HEAD(r);
+
+       if (disable_ipv6) {
+               printk(KERN_INFO
+                      "IPv6: Loaded, but administratively disabled, "
+                      "reboot required to enable\n");
+               goto out;
+       }
+
        err = proto_register(&tcpv6_prot, 1);
        if (err)
                goto out;
@@ -1012,10 +1027,6 @@ static int __init inet6_init(void)
                goto out_unregister_udplite_proto;
 
 
-       /* Register the socket-side information for inet6_create.  */
-       for(r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r)
-               INIT_LIST_HEAD(r);
-
        /* We MUST register RAW sockets before we create the ICMP6,
         * IGMP6, or NDISC control sockets.
         */
@@ -1181,6 +1192,9 @@ module_init(inet6_init);
 
 static void __exit inet6_exit(void)
 {
+       if (disable_ipv6)
+               return;
+
        /* First of all disallow new sockets creation. */
        sock_unregister(PF_INET6);
        /* Disallow any further netlink messages */