net: convert usage of packet_type to read_mostly

[net-next-2.6.git] / net / ipv6 / af_inet6.c

diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index fa2ac7ee662fa3de8bc162ca2a2429b2dcebde28..3e2ddfaee81a5b1cd2b5f133db31bce0d43528c2 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);
@@ -889,7 +893,7 @@ out_unlock:
        return err;
 }
 
-static struct packet_type ipv6_packet_type = {
+static struct packet_type ipv6_packet_type __read_mostly = {
        .type = cpu_to_be16(ETH_P_IPV6),
        .func = ipv6_rcv,
        .gso_send_check = ipv6_gso_send_check,
@@ -1001,10 +1005,21 @@ 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;
@@ -1022,10 +1037,6 @@ 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.
         */