netfilter: split nf_sockopt

Split nf_sockopt into a getsockopt and setsockopt side as they share
very little code.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/netfilter/nf_sockopt.c

@@ -89,36 +89,32 @@ static struct nf_sockopt_ops *nf_sockopt_find(struct sock *sk, u_int8_t pf,
 	return ops;
 }
 
-/* Call get/setsockopt() */
-static int nf_sockopt(struct sock *sk, u_int8_t pf, int val,
-		      char __user *opt, int *len, int get)
+int nf_setsockopt(struct sock *sk, u_int8_t pf, int val, char __user *opt,
+		  unsigned int len)
 {
 	struct nf_sockopt_ops *ops;
 	int ret;
 
-	ops = nf_sockopt_find(sk, pf, val, get);
+	ops = nf_sockopt_find(sk, pf, val, 0);
 	if (IS_ERR(ops))
 		return PTR_ERR(ops);
-
-	if (get)
-		ret = ops->get(sk, val, opt, len);
-	else
-		ret = ops->set(sk, val, opt, *len);
-
+	ret = ops->set(sk, val, opt, len);
 	module_put(ops->owner);
 	return ret;
 }
-
-int nf_setsockopt(struct sock *sk, u_int8_t pf, int val, char __user *opt,
-		  unsigned int len)
-{
-	return nf_sockopt(sk, pf, val, opt, &len, 0);
-}
 EXPORT_SYMBOL(nf_setsockopt);
 
 int nf_getsockopt(struct sock *sk, u_int8_t pf, int val, char __user *opt,
 		  int *len)
 {
-	return nf_sockopt(sk, pf, val, opt, len, 1);
+	struct nf_sockopt_ops *ops;
+	int ret;
+
+	ops = nf_sockopt_find(sk, pf, val, 1);
+	if (IS_ERR(ops))
+		return PTR_ERR(ops);
+	ret = ops->get(sk, val, opt, len);
+	module_put(ops->owner);
+	return ret;
 }
 EXPORT_SYMBOL(nf_getsockopt);