/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with this
* work for additional information regarding copyright ownership. The ASF
* licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package org.apache.hadoop.hdfs.nfs.nfs3;
import java.net.DatagramSocket;
import java.net.InetSocketAddress;
import org.apache.commons.daemon.Daemon;
import org.apache.commons.daemon.DaemonContext;
import org.apache.hadoop.hdfs.nfs.conf.NfsConfigKeys;
import org.apache.hadoop.hdfs.nfs.conf.NfsConfiguration;
/**
* This class is used to allow the initial registration of the NFS gateway with
* the system portmap daemon to come from a privileged (< 1024) port. This is
* necessary on certain operating systems to work around this bug in rpcbind:
*
* Red Hat: https://bugzilla.redhat.com/show_bug.cgi?id=731542
* SLES: https://bugzilla.novell.com/show_bug.cgi?id=823364
* Debian: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=594880
*/
public class PrivilegedNfsGatewayStarter implements Daemon {
private String[] args = null;
private DatagramSocket registrationSocket = null;
@Override
public void init(DaemonContext context) throws Exception {
System.err.println("Initializing privileged NFS client socket...");
NfsConfiguration conf = new NfsConfiguration();
int clientPort = conf.getInt(NfsConfigKeys.DFS_NFS_REGISTRATION_PORT_KEY,
NfsConfigKeys.DFS_NFS_REGISTRATION_PORT_DEFAULT);
if (clientPort < 1 || clientPort > 1023) {
throw new RuntimeException("Must start privileged NFS server with '" +
NfsConfigKeys.DFS_NFS_REGISTRATION_PORT_KEY + "' configured to a " +
"privileged port.");
}
registrationSocket = new DatagramSocket(
new InetSocketAddress("localhost", clientPort));
registrationSocket.setReuseAddress(true);
args = context.getArguments();
}
@Override
public void start() throws Exception {
Nfs3.startService(args, registrationSocket);
}
@Override
public void stop() throws Exception {
// Nothing to do.
}
@Override
public void destroy() {
if (registrationSocket != null && !registrationSocket.isClosed()) {
registrationSocket.close();
}
}
}