| /** |
| * 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.mount; |
| |
| import java.nio.charset.StandardCharsets; |
| import java.util.List; |
| |
| import org.apache.hadoop.nfs.NfsExports; |
| import org.apache.hadoop.oncrpc.RpcAcceptedReply; |
| import org.apache.hadoop.oncrpc.XDR; |
| import org.apache.hadoop.oncrpc.security.VerifierNone; |
| import org.apache.hadoop.oncrpc.security.RpcAuthInfo.AuthFlavor; |
| |
| /** |
| * Helper class for sending MountResponse |
| */ |
| public class MountResponse { |
| public final static int MNT_OK = 0; |
| |
| /** Hidden constructor */ |
| private MountResponse() { |
| } |
| |
| /** |
| * Response for RPC call {@link MountInterface.MNTPROC#MNT}. |
| * @param status status of mount response |
| * @param xdr XDR message object |
| * @param xid transaction id |
| * @param handle file handle |
| * @return response XDR |
| */ |
| public static XDR writeMNTResponse(int status, XDR xdr, int xid, |
| byte[] handle) { |
| RpcAcceptedReply.getAcceptInstance(xid, new VerifierNone()).write(xdr); |
| xdr.writeInt(status); |
| if (status == MNT_OK) { |
| xdr.writeVariableOpaque(handle); |
| // Only MountV3 returns a list of supported authFlavors |
| xdr.writeInt(1); |
| xdr.writeInt(AuthFlavor.AUTH_SYS.getValue()); |
| } |
| return xdr; |
| } |
| |
| /** |
| * Response for RPC call {@link MountInterface.MNTPROC#DUMP}. |
| * @param xdr XDR message object |
| * @param xid transaction id |
| * @param mounts mount entries |
| * @return response XDR |
| */ |
| public static XDR writeMountList(XDR xdr, int xid, List<MountEntry> mounts) { |
| RpcAcceptedReply.getAcceptInstance(xid, new VerifierNone()).write(xdr); |
| for (MountEntry mountEntry : mounts) { |
| xdr.writeBoolean(true); // Value follows yes |
| xdr.writeString(mountEntry.getHost()); |
| xdr.writeString(mountEntry.getPath()); |
| } |
| xdr.writeBoolean(false); // Value follows no |
| return xdr; |
| } |
| |
| /** |
| * Response for RPC call {@link MountInterface.MNTPROC#EXPORT}. |
| * @param xdr XDR message object |
| * @param xid transaction id |
| * @param exports export list |
| * @param hostMatcher the list of export host |
| * @return response XDR |
| */ |
| public static XDR writeExportList(XDR xdr, int xid, List<String> exports, |
| List<NfsExports> hostMatcher) { |
| assert (exports.size() == hostMatcher.size()); |
| |
| RpcAcceptedReply.getAcceptInstance(xid, new VerifierNone()).write(xdr); |
| for (int i = 0; i < exports.size(); i++) { |
| xdr.writeBoolean(true); // Value follows - yes |
| xdr.writeString(exports.get(i)); |
| |
| // List host groups |
| String[] hostGroups = hostMatcher.get(i).getHostGroupList(); |
| if (hostGroups.length > 0) { |
| for (int j = 0; j < hostGroups.length; j++) { |
| xdr.writeBoolean(true); // Value follows - yes |
| xdr.writeVariableOpaque( |
| hostGroups[j].getBytes(StandardCharsets.UTF_8)); |
| } |
| } |
| xdr.writeBoolean(false); // Value follows - no more group |
| } |
| |
| xdr.writeBoolean(false); // Value follows - no |
| return xdr; |
| } |
| } |