SUNRPC: cleanup transport creation argument passing

Cleanup argument passing to functions for creating an RPC transport.
Signed-off-by: Frank van Maarseveen <frankvm@frankvm.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

include/linux/sunrpc/xprt.h

@@ -17,6 +17,8 @@
 #include <linux/sunrpc/xdr.h>
 #include <linux/sunrpc/msg_prot.h>
 
+#ifdef __KERNEL__
+
 extern unsigned int xprt_udp_slot_table_entries;
 extern unsigned int xprt_tcp_slot_table_entries;
 
@@ -194,7 +196,12 @@ struct rpc_xprt {
 	char *			address_strings[RPC_DISPLAY_MAX];
 };
 
-#ifdef __KERNEL__
+struct rpc_xprtsock_create {
+	int			proto;		/* IPPROTO_UDP or IPPROTO_TCP */
+	struct sockaddr *	dstaddr;	/* remote peer address */
+	size_t			addrlen;
+	struct rpc_timeout *	timeout;	/* optional timeout parameters */
+};
 
 /*
  * Transport operations used by ULPs
@@ -204,7 +211,7 @@ void			xprt_set_timeout(struct rpc_timeout *to, unsigned int retr, unsigned long
 /*
  * Generic internal transport functions
  */
-struct rpc_xprt *	xprt_create_transport(int proto, struct sockaddr *addr, size_t size, struct rpc_timeout *toparms);
+struct rpc_xprt *	xprt_create_transport(struct rpc_xprtsock_create *args);
 void			xprt_connect(struct rpc_task *task);
 void			xprt_reserve(struct rpc_task *task);
 int			xprt_reserve_xprt(struct rpc_task *task);
@@ -242,8 +249,8 @@ void			xprt_disconnect(struct rpc_xprt *xprt);
 /*
  * Socket transport setup operations
  */
-struct rpc_xprt *	xs_setup_udp(struct sockaddr *addr, size_t addrlen, struct rpc_timeout *to);
-struct rpc_xprt *	xs_setup_tcp(struct sockaddr *addr, size_t addrlen, struct rpc_timeout *to);
+struct rpc_xprt *	xs_setup_udp(struct rpc_xprtsock_create *args);
+struct rpc_xprt *	xs_setup_tcp(struct rpc_xprtsock_create *args);
 int			init_socket_xprt(void);
 void			cleanup_socket_xprt(void);
 

net/sunrpc/clnt.c

@@ -234,10 +234,15 @@ struct rpc_clnt *rpc_create(struct rpc_create_args *args)
 {
 	struct rpc_xprt *xprt;
 	struct rpc_clnt *clnt;
+	struct rpc_xprtsock_create xprtargs = {
+		.proto = args->protocol,
+		.dstaddr = args->address,
+		.addrlen = args->addrsize,
+		.timeout = args->timeout
+	};
 	char servername[20];
 
-	xprt = xprt_create_transport(args->protocol, args->address,
-					args->addrsize, args->timeout);
+	xprt = xprt_create_transport(&xprtargs);
 	if (IS_ERR(xprt))
 		return (struct rpc_clnt *)xprt;
 

net/sunrpc/xprt.c

@@ -886,27 +886,24 @@ void xprt_set_timeout(struct rpc_timeout *to, unsigned int retr, unsigned long i
 
 /**
  * xprt_create_transport - create an RPC transport
- * @proto: requested transport protocol
- * @ap: remote peer address
- * @size: length of address
- * @to: timeout parameters
+ * @args: rpc transport creation arguments
  *
  */
-struct rpc_xprt *xprt_create_transport(int proto, struct sockaddr *ap, size_t size, struct rpc_timeout *to)
+struct rpc_xprt *xprt_create_transport(struct rpc_xprtsock_create *args)
 {
 	struct rpc_xprt	*xprt;
 	struct rpc_rqst	*req;
 
-	switch (proto) {
+	switch (args->proto) {
 	case IPPROTO_UDP:
-		xprt = xs_setup_udp(ap, size, to);
+		xprt = xs_setup_udp(args);
 		break;
 	case IPPROTO_TCP:
-		xprt = xs_setup_tcp(ap, size, to);
+		xprt = xs_setup_tcp(args);
 		break;
 	default:
 		printk(KERN_ERR "RPC: unrecognized transport protocol: %d\n",
-				proto);
+				args->proto);
 		return ERR_PTR(-EIO);
 	}
 	if (IS_ERR(xprt)) {

net/sunrpc/xprtsock.c

@@ -1502,12 +1502,12 @@ static struct rpc_xprt_ops xs_tcp_ops = {
 	.print_stats		= xs_tcp_print_stats,
 };
 
-static struct rpc_xprt *xs_setup_xprt(struct sockaddr *addr, size_t addrlen, unsigned int slot_table_size)
+static struct rpc_xprt *xs_setup_xprt(struct rpc_xprtsock_create *args, unsigned int slot_table_size)
 {
 	struct rpc_xprt *xprt;
 	struct sock_xprt *new;
 
-	if (addrlen > sizeof(xprt->addr)) {
+	if (args->addrlen > sizeof(xprt->addr)) {
 		dprintk("RPC:       xs_setup_xprt: address too large\n");
 		return ERR_PTR(-EBADF);
 	}
@@ -1529,8 +1529,8 @@ static struct rpc_xprt *xs_setup_xprt(struct sockaddr *addr, size_t addrlen, uns
 		return ERR_PTR(-ENOMEM);
 	}
 
-	memcpy(&xprt->addr, addr, addrlen);
-	xprt->addrlen = addrlen;
+	memcpy(&xprt->addr, args->dstaddr, args->addrlen);
+	xprt->addrlen = args->addrlen;
 	new->port = xs_get_random_port();
 
 	return xprt;
@@ -1538,22 +1538,20 @@ static struct rpc_xprt *xs_setup_xprt(struct sockaddr *addr, size_t addrlen, uns
 
 /**
  * xs_setup_udp - Set up transport to use a UDP socket
- * @addr: address of remote server
- * @addrlen: length of address in bytes
- * @to:   timeout parameters
+ * @args: rpc transport creation arguments
  *
  */
-struct rpc_xprt *xs_setup_udp(struct sockaddr *addr, size_t addrlen, struct rpc_timeout *to)
+struct rpc_xprt *xs_setup_udp(struct rpc_xprtsock_create *args)
 {
 	struct rpc_xprt *xprt;
 	struct sock_xprt *transport;
 
-	xprt = xs_setup_xprt(addr, addrlen, xprt_udp_slot_table_entries);
+	xprt = xs_setup_xprt(args, xprt_udp_slot_table_entries);
 	if (IS_ERR(xprt))
 		return xprt;
 	transport = container_of(xprt, struct sock_xprt, xprt);
 
-	if (ntohs(((struct sockaddr_in *)addr)->sin_port) != 0)
+	if (ntohs(((struct sockaddr_in *)args->dstaddr)->sin_port) != 0)
 		xprt_set_bound(xprt);
 
 	xprt->prot = IPPROTO_UDP;
@@ -1569,8 +1567,8 @@ struct rpc_xprt *xs_setup_udp(struct sockaddr *addr, size_t addrlen, struct rpc_
 
 	xprt->ops = &xs_udp_ops;
 
-	if (to)
-		xprt->timeout = *to;
+	if (args->timeout)
+		xprt->timeout = *args->timeout;
 	else
 		xprt_set_timeout(&xprt->timeout, 5, 5 * HZ);
 
@@ -1583,22 +1581,20 @@ struct rpc_xprt *xs_setup_udp(struct sockaddr *addr, size_t addrlen, struct rpc_
 
 /**
  * xs_setup_tcp - Set up transport to use a TCP socket
- * @addr: address of remote server
- * @addrlen: length of address in bytes
- * @to: timeout parameters
+ * @args: rpc transport creation arguments
  *
  */
-struct rpc_xprt *xs_setup_tcp(struct sockaddr *addr, size_t addrlen, struct rpc_timeout *to)
+struct rpc_xprt *xs_setup_tcp(struct rpc_xprtsock_create *args)
 {
 	struct rpc_xprt *xprt;
 	struct sock_xprt *transport;
 
-	xprt = xs_setup_xprt(addr, addrlen, xprt_tcp_slot_table_entries);
+	xprt = xs_setup_xprt(args, xprt_tcp_slot_table_entries);
 	if (IS_ERR(xprt))
 		return xprt;
 	transport = container_of(xprt, struct sock_xprt, xprt);
 
-	if (ntohs(((struct sockaddr_in *)addr)->sin_port) != 0)
+	if (ntohs(((struct sockaddr_in *)args->dstaddr)->sin_port) != 0)
 		xprt_set_bound(xprt);
 
 	xprt->prot = IPPROTO_TCP;
@@ -1613,8 +1609,8 @@ struct rpc_xprt *xs_setup_tcp(struct sockaddr *addr, size_t addrlen, struct rpc_
 
 	xprt->ops = &xs_tcp_ops;
 
-	if (to)
-		xprt->timeout = *to;
+	if (args->timeout)
+		xprt->timeout = *args->timeout;
 	else
 		xprt_set_timeout(&xprt->timeout, 2, 60 * HZ);