[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>

1 files changed, 55 insertions, 12 deletions

diff --git a/net/dccp/proto.c b/net/dccp/proto.c
index baccaf3..59b2149 100644
--- a/net/dccp/proto.c
+++ b/net/dccp/proto.c
@@ -455,18 +455,13 @@ out_free_val:
 	goto out;
 }
 
-int dccp_setsockopt(struct sock *sk, int level, int optname,
-		    char __user *optval, int optlen)
+static int do_dccp_setsockopt(struct sock *sk, int level, int optname,
+		char __user *optval, int optlen)
 {
 	struct dccp_sock *dp;
 	int err;
 	int val;
 
-	if (level != SOL_DCCP)
-		return inet_csk(sk)->icsk_af_ops->setsockopt(sk, level,
-							     optname, optval,
-							     optlen);
-
 	if (optlen < sizeof(int))
 		return -EINVAL;
 
@@ -512,8 +507,34 @@ int dccp_setsockopt(struct sock *sk, int level, int optname,
 	return err;
 }
 
+int dccp_setsockopt(struct sock *sk, int level, int optname,
+		    char __user *optval, int optlen)
+{
+	if (level != SOL_DCCP)
+		return inet_csk(sk)->icsk_af_ops->setsockopt(sk, level,
+							     optname, optval,
+							     optlen);
+	return do_dccp_setsockopt(sk, level, optname, optval, optlen);
+}
 EXPORT_SYMBOL_GPL(dccp_setsockopt);
 
+#ifdef CONFIG_COMPAT
+int compat_dccp_setsockopt(struct sock *sk, int level, int optname,
+		    char __user *optval, int optlen)
+{
+	if (level != SOL_DCCP) {
+		if (inet_csk(sk)->icsk_af_ops->compat_setsockopt)
+			return inet_csk(sk)->icsk_af_ops->compat_setsockopt(sk,
+				level, optname, optval, optlen);
+		else
+			return inet_csk(sk)->icsk_af_ops->setsockopt(sk,
+				level, optname, optval, optlen);
+	}
+	return do_dccp_setsockopt(sk, level, optname, optval, optlen);
+}
+EXPORT_SYMBOL_GPL(compat_dccp_setsockopt);
+#endif
+
 static int dccp_getsockopt_service(struct sock *sk, int len,
 				   __be32 __user *optval,
 				   int __user *optlen)
@@ -545,16 +566,12 @@ out:
 	return err;
 }
 
-int dccp_getsockopt(struct sock *sk, int level, int optname,
+static int do_dccp_getsockopt(struct sock *sk, int level, int optname,
 		    char __user *optval, int __user *optlen)
 {
 	struct dccp_sock *dp;
 	int val, len;
 
-	if (level != SOL_DCCP)
-		return inet_csk(sk)->icsk_af_ops->getsockopt(sk, level,
-							     optname, optval,
-							     optlen);
 	if (get_user(len, optlen))
 		return -EFAULT;
 
@@ -587,8 +604,34 @@ int dccp_getsockopt(struct sock *sk, int level, int optname,
 	return 0;
 }
 
+int dccp_getsockopt(struct sock *sk, int level, int optname,
+		    char __user *optval, int __user *optlen)
+{
+	if (level != SOL_DCCP)
+		return inet_csk(sk)->icsk_af_ops->getsockopt(sk, level,
+							     optname, optval,
+							     optlen);
+	return do_dccp_getsockopt(sk, level, optname, optval, optlen);
+}
 EXPORT_SYMBOL_GPL(dccp_getsockopt);
 
+#ifdef CONFIG_COMPAT
+int compat_dccp_getsockopt(struct sock *sk, int level, int optname,
+		    char __user *optval, int __user *optlen)
+{
+	if (level != SOL_DCCP) {
+		if (inet_csk(sk)->icsk_af_ops->compat_setsockopt)
+			return inet_csk(sk)->icsk_af_ops->compat_getsockopt(sk,
+				level, optname, optval, optlen);
+		else
+			return inet_csk(sk)->icsk_af_ops->getsockopt(sk,
+				level, optname, optval, optlen);
+	}
+	return do_dccp_getsockopt(sk, level, optname, optval, optlen);
+}
+EXPORT_SYMBOL_GPL(compat_dccp_getsockopt);
+#endif
+
 int dccp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
 		 size_t len)
 {