SUNRPC: Rename rpcb_getport_external routine

In preparation for handling NFS mount option parsing in the kernel,
rename rpcb_getport_external as rpcb_get_port_sync, and make it available
always (instead of only when CONFIG_ROOT_NFS is enabled).
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

fs/nfs/nfsroot.c

@@ -428,7 +428,7 @@ static int __init root_nfs_getport(int program, int version, int proto)
 	printk(KERN_NOTICE "Looking up port of RPC %d/%d on %u.%u.%u.%u\n",
 		program, version, NIPQUAD(servaddr));
 	set_sockaddr(&sin, servaddr, 0);
-	return rpcb_getport_external(&sin, program, version, proto);
+	return rpcb_getport_sync(&sin, program, version, proto);
 }
 
 

include/linux/sunrpc/clnt.h

@@ -120,8 +120,10 @@ struct rpc_clnt	*rpc_bind_new_program(struct rpc_clnt *,
 struct rpc_clnt *rpc_clone_client(struct rpc_clnt *);
 void		rpc_shutdown_client(struct rpc_clnt *);
 void		rpc_release_client(struct rpc_clnt *);
+
 int		rpcb_register(u32, u32, int, unsigned short, int *);
 void		rpcb_getport(struct rpc_task *);
+int		rpcb_getport_sync(struct sockaddr_in *, __u32, __u32, int);
 
 void		rpc_call_setup(struct rpc_task *, struct rpc_message *, int);
 
@@ -141,10 +143,5 @@ void		rpc_force_rebind(struct rpc_clnt *);
 size_t		rpc_peeraddr(struct rpc_clnt *, struct sockaddr *, size_t);
 char *		rpc_peeraddr2str(struct rpc_clnt *, enum rpc_display_format_t);
 
-/*
- * Helper function for NFSroot support
- */
-int		rpcb_getport_external(struct sockaddr_in *, __u32, __u32, int);
-
 #endif /* __KERNEL__ */
 #endif /* _LINUX_SUNRPC_CLNT_H */

net/sunrpc/rpcb_clnt.c

@@ -12,6 +12,8 @@
  *  Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
  */
 
+#include <linux/module.h>
+
 #include <linux/types.h>
 #include <linux/socket.h>
 #include <linux/kernel.h>
@@ -247,21 +249,20 @@ int rpcb_register(u32 prog, u32 vers, int prot, unsigned short port, int *okay)
 	return error;
 }
 
-#ifdef CONFIG_ROOT_NFS
 /**
- * rpcb_getport_external - obtain the port for an RPC service on a given host
+ * rpcb_getport_sync - obtain the port for an RPC service on a given host
  * @sin: address of remote peer
  * @prog: RPC program number to bind
  * @vers: RPC version number to bind
  * @prot: transport protocol to use to make this request
  *
  * Called from outside the RPC client in a synchronous task context.
+ * Uses default timeout parameters specified by underlying transport.
  *
- * For now, this supports only version 2 queries, but is used only by
- * mount_clnt for NFS_ROOT.
+ * XXX: Needs to support IPv6, and rpcbind versions 3 and 4
  */
-int rpcb_getport_external(struct sockaddr_in *sin, __u32 prog,
-				__u32 vers, int prot)
+int rpcb_getport_sync(struct sockaddr_in *sin, __u32 prog,
+		      __u32 vers, int prot)
 {
 	struct rpcbind_args map = {
 		.r_prog		= prog,
@@ -278,10 +279,10 @@ int rpcb_getport_external(struct sockaddr_in *sin, __u32 prog,
 	char hostname[40];
 	int status;
 
-	dprintk("RPC:       rpcb_getport_external(%u.%u.%u.%u, %u, %u, %d)\n",
-			NIPQUAD(sin->sin_addr.s_addr), prog, vers, prot);
+	dprintk("RPC:       %s(" NIPQUAD_FMT ", %u, %u, %d)\n",
+		__FUNCTION__, NIPQUAD(sin->sin_addr.s_addr), prog, vers, prot);
 
-	sprintf(hostname, "%u.%u.%u.%u", NIPQUAD(sin->sin_addr.s_addr));
+	sprintf(hostname, NIPQUAD_FMT, NIPQUAD(sin->sin_addr.s_addr));
 	rpcb_clnt = rpcb_create(hostname, (struct sockaddr *)sin, prot, 2, 0);
 	if (IS_ERR(rpcb_clnt))
 		return PTR_ERR(rpcb_clnt);
@@ -296,7 +297,7 @@ int rpcb_getport_external(struct sockaddr_in *sin, __u32 prog,
 	}
 	return status;
 }
-#endif
+EXPORT_SYMBOL_GPL(rpcb_getport_sync);
 
 /**
  * rpcb_getport - obtain the port for a given RPC service on a given host