[PATCH] RPC: Return -EPFNOSUPPORT for RPC programs that are unavailable

Signed-off-by: Andreas Gruenbacher <agruen@suse.de>
Signed-off-by: Olaf Kirch <okir@suse.de>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

net/sunrpc/clnt.c

@@ -1021,10 +1021,11 @@ call_verify(struct rpc_task *task)
 			case RPC_AUTH_ERROR:
 				break;
 			case RPC_MISMATCH:
-				printk(KERN_WARNING "%s: RPC call version mismatch!\n", __FUNCTION__);
-				goto out_eio;
+				dprintk("%s: RPC call version mismatch!\n", __FUNCTION__);
+				error = -EPROTONOSUPPORT;
+				goto out_err;
 			default:
-				printk(KERN_WARNING "%s: RPC call rejected, unknown error: %x\n", __FUNCTION__, n);
+				dprintk("%s: RPC call rejected, unknown error: %x\n", __FUNCTION__, n);
 				goto out_eio;
 		}
 		if (--len < 0)
@@ -1075,23 +1076,26 @@ call_verify(struct rpc_task *task)
 	case RPC_SUCCESS:
 		return p;
 	case RPC_PROG_UNAVAIL:
-		printk(KERN_WARNING "RPC: call_verify: program %u is unsupported by server %s\n",
+		dprintk("RPC: call_verify: program %u is unsupported by server %s\n",
 				(unsigned int)task->tk_client->cl_prog,
 				task->tk_client->cl_server);
-		goto out_eio;
+		error = -EPFNOSUPPORT;
+		goto out_err;
 	case RPC_PROG_MISMATCH:
-		printk(KERN_WARNING "RPC: call_verify: program %u, version %u unsupported by server %s\n",
+		dprintk("RPC: call_verify: program %u, version %u unsupported by server %s\n",
 				(unsigned int)task->tk_client->cl_prog,
 				(unsigned int)task->tk_client->cl_vers,
 				task->tk_client->cl_server);
-		goto out_eio;
+		error = -EPROTONOSUPPORT;
+		goto out_err;
 	case RPC_PROC_UNAVAIL:
-		printk(KERN_WARNING "RPC: call_verify: proc %p unsupported by program %u, version %u on server %s\n",
+		dprintk("RPC: call_verify: proc %p unsupported by program %u, version %u on server %s\n",
 				task->tk_msg.rpc_proc,
 				task->tk_client->cl_prog,
 				task->tk_client->cl_vers,
 				task->tk_client->cl_server);
-		goto out_eio;
+		error = -EOPNOTSUPP;
+		goto out_err;
 	case RPC_GARBAGE_ARGS:
 		dprintk("RPC: %4d %s: server saw garbage\n", task->tk_pid, __FUNCTION__);
 		break;			/* retry */
@@ -1104,7 +1108,7 @@ call_verify(struct rpc_task *task)
 	task->tk_client->cl_stats->rpcgarbage++;
 	if (task->tk_garb_retry) {
 		task->tk_garb_retry--;
-		dprintk(KERN_WARNING "RPC %s: retrying %4d\n", __FUNCTION__, task->tk_pid);
+		dprintk("RPC %s: retrying %4d\n", __FUNCTION__, task->tk_pid);
 		task->tk_action = call_bind;
 		return NULL;
 	}