SUNRPC: parametrize local rpcbind clients creation with net ns

These client are per network namespace and thus can be created for different
network namespaces.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

include/linux/sunrpc/clnt.h

@@ -136,8 +136,8 @@ void		rpc_shutdown_client(struct rpc_clnt *);
 void		rpc_release_client(struct rpc_clnt *);
 void		rpc_task_release_client(struct rpc_task *);
 
-int		rpcb_create_local(void);
-void		rpcb_put_local(void);
+int		rpcb_create_local(struct net *);
+void		rpcb_put_local(struct net *);
 int		rpcb_register(struct net *, u32, u32, int, unsigned short);
 int		rpcb_v4_register(struct net *net, const u32 program,
 				 const u32 version,

net/sunrpc/rpcb_clnt.c

@@ -175,9 +175,9 @@ static int rpcb_get_local(struct net *net)
 	return cnt;
 }
 
-void rpcb_put_local(void)
+void rpcb_put_local(struct net *net)
 {
-	struct sunrpc_net *sn = net_generic(&init_net, sunrpc_net_id);
+	struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
 	struct rpc_clnt *clnt = sn->rpcb_local_clnt;
 	struct rpc_clnt *clnt4 = sn->rpcb_local_clnt4;
 	int shutdown;
@@ -323,11 +323,10 @@ static int rpcb_create_local_net(struct net *net)
  * Returns zero on success, otherwise a negative errno value
  * is returned.
  */
-int rpcb_create_local(void)
+int rpcb_create_local(struct net *net)
 {
 	static DEFINE_MUTEX(rpcb_create_local_mutex);
 	int result = 0;
-	struct net *net = &init_net;
 
 	if (rpcb_get_local(net))
 		return result;

net/sunrpc/svc.c

@@ -372,7 +372,7 @@ static int svc_rpcb_setup(struct svc_serv *serv)
 {
 	int err;
 
-	err = rpcb_create_local();
+	err = rpcb_create_local(&init_net);
 	if (err)
 		return err;
 
@@ -384,7 +384,7 @@ static int svc_rpcb_setup(struct svc_serv *serv)
 void svc_rpcb_cleanup(struct svc_serv *serv)
 {
 	svc_unregister(serv);
-	rpcb_put_local();
+	rpcb_put_local(&init_net);
 }
 EXPORT_SYMBOL_GPL(svc_rpcb_cleanup);