[IPV6]: Simplify IPv6 control sockets creation.

Do this by replacing sock_create_kern with inet_ctl_sock_create.
Signed-off-by: Denis V. Lunev <den@openvz.org>
Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv6/icmp.c

@@ -64,6 +64,7 @@
 #include <net/addrconf.h>
 #include <net/icmp.h>
 #include <net/xfrm.h>
+#include <net/inet_common.h>
 
 #include <asm/uaccess.h>
 #include <asm/system.h>
@@ -808,9 +809,8 @@ static int __net_init icmpv6_sk_init(struct net *net)
 		return -ENOMEM;
 
 	for_each_possible_cpu(i) {
-		struct socket *sock;
-		err = sock_create_kern(PF_INET6, SOCK_RAW, IPPROTO_ICMPV6,
-				       &sock);
+		err = inet_ctl_sock_create(&sk, PF_INET6,
+					   SOCK_RAW, IPPROTO_ICMPV6, net);
 		if (err < 0) {
 			printk(KERN_ERR
 			       "Failed to initialize the ICMP6 control socket "
@@ -819,10 +819,8 @@ static int __net_init icmpv6_sk_init(struct net *net)
 			goto fail;
 		}
 
-		net->ipv6.icmp_sk[i] = sk = sock->sk;
-		sk_change_net(sk, net);
+		net->ipv6.icmp_sk[i] = sk;
 
-		sk->sk_allocation = GFP_ATOMIC;
 		/*
 		 * Split off their lock-class, because sk->sk_dst_lock
 		 * gets used from softirqs, which is safe for
@@ -837,14 +835,12 @@ static int __net_init icmpv6_sk_init(struct net *net)
 		 */
 		sk->sk_sndbuf =
 			(2 * ((64 * 1024) + sizeof(struct sk_buff)));
-
-		sk->sk_prot->unhash(sk);
 	}
 	return 0;
 
  fail:
 	for (j = 0; j < i; j++)
-		sk_release_kernel(net->ipv6.icmp_sk[j]);
+		inet_ctl_sock_destroy(net->ipv6.icmp_sk[j]);
 	kfree(net->ipv6.icmp_sk);
 	return err;
 }
@@ -854,7 +850,7 @@ static void __net_exit icmpv6_sk_exit(struct net *net)
 	int i;
 
 	for_each_possible_cpu(i) {
-		sk_release_kernel(net->ipv6.icmp_sk[i]);
+		inet_ctl_sock_destroy(net->ipv6.icmp_sk[i]);
 	}
 	kfree(net->ipv6.icmp_sk);
 }

net/ipv6/mcast.c

@@ -59,6 +59,7 @@
 #include <net/ndisc.h>
 #include <net/addrconf.h>
 #include <net/ip6_route.h>
+#include <net/inet_common.h>
 
 #include <net/ip6_checksum.h>
 
@@ -2672,12 +2673,10 @@ static void igmp6_proc_exit(struct net *net)
 
 static int igmp6_net_init(struct net *net)
 {
-	struct ipv6_pinfo *np;
-	struct socket *sock;
-	struct sock *sk;
 	int err;
 
-	err = sock_create_kern(PF_INET6, SOCK_RAW, IPPROTO_ICMPV6, &sock);
+	err = inet_ctl_sock_create(&net->ipv6.igmp_sk, PF_INET6,
+				   SOCK_RAW, IPPROTO_ICMPV6, net);
 	if (err < 0) {
 		printk(KERN_ERR
 		       "Failed to initialize the IGMP6 control socket (err %d).\n",
@@ -2685,13 +2684,7 @@ static int igmp6_net_init(struct net *net)
 		goto out;
 	}
 
-	net->ipv6.igmp_sk = sk = sock->sk;
-	sk_change_net(sk, net);
-	sk->sk_allocation = GFP_ATOMIC;
-	sk->sk_prot->unhash(sk);
-
-	np = inet6_sk(sk);
-	np->hop_limit = 1;
+	inet6_sk(net->ipv6.igmp_sk)->hop_limit = 1;
 
 	err = igmp6_proc_init(net);
 	if (err)
@@ -2700,13 +2693,13 @@ static int igmp6_net_init(struct net *net)
 	return err;
 
 out_sock_create:
-	sk_release_kernel(net->ipv6.igmp_sk);
+	inet_ctl_sock_destroy(net->ipv6.igmp_sk);
 	goto out;
 }
 
 static void igmp6_net_exit(struct net *net)
 {
-	sk_release_kernel(net->ipv6.igmp_sk);
+	inet_ctl_sock_destroy(net->ipv6.igmp_sk);
 	igmp6_proc_exit(net);
 }
 

net/ipv6/ndisc.c

@@ -84,6 +84,7 @@
 
 #include <net/flow.h>
 #include <net/ip6_checksum.h>
+#include <net/inet_common.h>
 #include <linux/proc_fs.h>
 
 #include <linux/netfilter.h>
@@ -1731,12 +1732,12 @@ static int ndisc_ifinfo_sysctl_strategy(ctl_table *ctl, int __user *name,
 
 static int ndisc_net_init(struct net *net)
 {
-	struct socket *sock;
 	struct ipv6_pinfo *np;
 	struct sock *sk;
 	int err;
 
-	err = sock_create_kern(PF_INET6, SOCK_RAW, IPPROTO_ICMPV6, &sock);
+	err = inet_ctl_sock_create(&sk, PF_INET6,
+				   SOCK_RAW, IPPROTO_ICMPV6, net);
 	if (err < 0) {
 		ND_PRINTK0(KERN_ERR
 			   "ICMPv6 NDISC: Failed to initialize the control socket (err %d).\n",
@@ -1744,22 +1745,19 @@ static int ndisc_net_init(struct net *net)
 		return err;
 	}
 
-	net->ipv6.ndisc_sk = sk = sock->sk;
-	sk_change_net(sk, net);
+	net->ipv6.ndisc_sk = sk;
 
 	np = inet6_sk(sk);
-	sk->sk_allocation = GFP_ATOMIC;
 	np->hop_limit = 255;
 	/* Do not loopback ndisc messages */
 	np->mc_loop = 0;
-	sk->sk_prot->unhash(sk);
 
 	return 0;
 }
 
 static void ndisc_net_exit(struct net *net)
 {
-	sk_release_kernel(net->ipv6.ndisc_sk);
+	inet_ctl_sock_destroy(net->ipv6.ndisc_sk);
 }
 
 static struct pernet_operations ndisc_net_ops = {