[NET]: {get|set}sockopt compatibility layer

This patch extends {get|set}sockopt compatibility layer in order to
move protocol specific parts to their place and avoid huge universal
net/compat.c file in the future.

Signed-off-by: Dmitry Mishin <dim@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index af6a0c6..2f8975e 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -1308,6 +1308,10 @@
 
 	.setsockopt	=	ipv6_setsockopt,
 	.getsockopt	=	ipv6_getsockopt,
+#ifdef CONFIG_COMPAT
+	.compat_setsockopt	= compat_ipv6_setsockopt,
+	.compat_getsockopt	= compat_ipv6_getsockopt,
+#endif
 	.addr2sockaddr	=	inet6_csk_addr2sockaddr,
 	.sockaddr_len	=	sizeof(struct sockaddr_in6)
 };
@@ -1327,6 +1331,10 @@
 
 	.setsockopt	=	ipv6_setsockopt,
 	.getsockopt	=	ipv6_getsockopt,
+#ifdef CONFIG_COMPAT
+	.compat_setsockopt	= compat_ipv6_setsockopt,
+	.compat_getsockopt	= compat_ipv6_getsockopt,
+#endif
 	.addr2sockaddr	=	inet6_csk_addr2sockaddr,
 	.sockaddr_len	=	sizeof(struct sockaddr_in6)
 };
@@ -1566,6 +1574,10 @@
 	.shutdown		= tcp_shutdown,
 	.setsockopt		= tcp_setsockopt,
 	.getsockopt		= tcp_getsockopt,
+#ifdef CONFIG_COMPAT
+	.compat_setsockopt	= compat_tcp_setsockopt,
+	.compat_getsockopt	= compat_tcp_getsockopt,
+#endif
 	.sendmsg		= tcp_sendmsg,
 	.recvmsg		= tcp_recvmsg,
 	.backlog_rcv		= tcp_v6_do_rcv,