SUNRPC: Make address format buffers more generic

For now we will assume that all transports will use the address format
buffers in the rpc_xprt struct to store their addresses.  Change
rpc_peer2str() to be a generic routine to handle this, and get rid of the
print_address() op in the rpc_xprt_ops vector.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

include/linux/sunrpc/xprt.h

@@ -106,7 +106,6 @@ struct rpc_rqst {
 
 struct rpc_xprt_ops {
 	void		(*set_buffer_size)(struct rpc_xprt *xprt, size_t sndsize, size_t rcvsize);
-	char *		(*print_addr)(struct rpc_xprt *xprt, enum rpc_display_format_t format);
 	int		(*reserve_xprt)(struct rpc_task *task);
 	void		(*release_xprt)(struct rpc_xprt *xprt, struct rpc_task *task);
 	void		(*rpcbind)(struct rpc_task *task);

net/sunrpc/clnt.c

@@ -594,7 +594,11 @@ EXPORT_SYMBOL_GPL(rpc_peeraddr);
 char *rpc_peeraddr2str(struct rpc_clnt *clnt, enum rpc_display_format_t format)
 {
 	struct rpc_xprt *xprt = clnt->cl_xprt;
-	return xprt->ops->print_addr(xprt, format);
+
+	if (xprt->address_strings[format] != NULL)
+		return xprt->address_strings[format];
+	else
+		return "unprintable";
 }
 EXPORT_SYMBOL_GPL(rpc_peeraddr2str);
 

net/sunrpc/xprtsock.c

@@ -1060,19 +1060,6 @@ static unsigned short xs_get_random_port(void)
 	return rand + xprt_min_resvport;
 }
 
-/**
- * xs_print_peer_address - format an IPv4 address for printing
- * @xprt: generic transport
- * @format: flags field indicating which parts of the address to render
- */
-static char *xs_print_peer_address(struct rpc_xprt *xprt, enum rpc_display_format_t format)
-{
-	if (xprt->address_strings[format] != NULL)
-		return xprt->address_strings[format];
-	else
-		return "unprintable";
-}
-
 /**
  * xs_set_port - reset the port number in the remote endpoint address
  * @xprt: generic transport
@@ -1146,7 +1133,7 @@ static void xs_udp_connect_worker(void *args)
 	}
 
 	dprintk("RPC:      worker connecting xprt %p to address: %s\n",
-			xprt, xs_print_peer_address(xprt, RPC_DISPLAY_ALL));
+			xprt, xprt->address_strings[RPC_DISPLAY_ALL]);
 
 	if (!transport->inet) {
 		struct sock *sk = sock->sk;
@@ -1233,7 +1220,7 @@ static void xs_tcp_connect_worker(void *args)
 		xs_tcp_reuse_connection(xprt);
 
 	dprintk("RPC:      worker connecting xprt %p to address: %s\n",
-			xprt, xs_print_peer_address(xprt, RPC_DISPLAY_ALL));
+			xprt, xprt->address_strings[RPC_DISPLAY_ALL]);
 
 	if (!transport->inet) {
 		struct sock *sk = sock->sk;
@@ -1380,7 +1367,6 @@ static void xs_tcp_print_stats(struct rpc_xprt *xprt, struct seq_file *seq)
 
 static struct rpc_xprt_ops xs_udp_ops = {
 	.set_buffer_size	= xs_udp_set_buffer_size,
-	.print_addr		= xs_print_peer_address,
 	.reserve_xprt		= xprt_reserve_xprt_cong,
 	.release_xprt		= xprt_release_xprt_cong,
 	.rpcbind		= rpc_getport,
@@ -1398,7 +1384,6 @@ static struct rpc_xprt_ops xs_udp_ops = {
 };
 
 static struct rpc_xprt_ops xs_tcp_ops = {
-	.print_addr		= xs_print_peer_address,
 	.reserve_xprt		= xprt_reserve_xprt,
 	.release_xprt		= xs_tcp_release_xprt,
 	.rpcbind		= rpc_getport,
@@ -1485,7 +1470,7 @@ struct rpc_xprt *xs_setup_udp(struct sockaddr *addr, size_t addrlen, struct rpc_
 
 	xs_format_peer_addresses(xprt);
 	dprintk("RPC:      set up transport to address %s\n",
-			xs_print_peer_address(xprt, RPC_DISPLAY_ALL));
+			xprt->address_strings[RPC_DISPLAY_ALL]);
 
 	return xprt;
 }
@@ -1529,7 +1514,7 @@ struct rpc_xprt *xs_setup_tcp(struct sockaddr *addr, size_t addrlen, struct rpc_
 
 	xs_format_peer_addresses(xprt);
 	dprintk("RPC:      set up transport to address %s\n",
-			xs_print_peer_address(xprt, RPC_DISPLAY_ALL));
+			xprt->address_strings[RPC_DISPLAY_ALL]);
 
 	return xprt;
 }