| /** |
| * 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.server.federation.store.impl; |
| |
| import java.io.IOException; |
| import java.util.Collections; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| import org.apache.hadoop.fs.permission.FsAction; |
| import org.apache.hadoop.hdfs.server.federation.router.RouterAdminServer; |
| import org.apache.hadoop.hdfs.server.federation.router.RouterPermissionChecker; |
| import org.apache.hadoop.hdfs.server.federation.store.MountTableStore; |
| import org.apache.hadoop.hdfs.server.federation.store.driver.StateStoreDriver; |
| import org.apache.hadoop.hdfs.server.federation.store.protocol.AddMountTableEntryRequest; |
| import org.apache.hadoop.hdfs.server.federation.store.protocol.AddMountTableEntryResponse; |
| import org.apache.hadoop.hdfs.server.federation.store.protocol.GetMountTableEntriesRequest; |
| import org.apache.hadoop.hdfs.server.federation.store.protocol.GetMountTableEntriesResponse; |
| import org.apache.hadoop.hdfs.server.federation.store.protocol.RemoveMountTableEntryRequest; |
| import org.apache.hadoop.hdfs.server.federation.store.protocol.RemoveMountTableEntryResponse; |
| import org.apache.hadoop.hdfs.server.federation.store.protocol.UpdateMountTableEntryRequest; |
| import org.apache.hadoop.hdfs.server.federation.store.protocol.UpdateMountTableEntryResponse; |
| import org.apache.hadoop.hdfs.server.federation.store.records.MountTable; |
| import org.apache.hadoop.hdfs.server.federation.store.records.Query; |
| import org.apache.hadoop.security.AccessControlException; |
| import org.apache.hadoop.util.Time; |
| |
| /** |
| * Implementation of the {@link MountTableStore} state store API. |
| */ |
| @InterfaceAudience.Private |
| @InterfaceStability.Evolving |
| public class MountTableStoreImpl extends MountTableStore { |
| |
| public MountTableStoreImpl(StateStoreDriver driver) { |
| super(driver); |
| } |
| |
| @Override |
| public AddMountTableEntryResponse addMountTableEntry( |
| AddMountTableEntryRequest request) throws IOException { |
| MountTable mountTable = request.getEntry(); |
| if (mountTable != null) { |
| RouterPermissionChecker pc = RouterAdminServer.getPermissionChecker(); |
| if (pc != null) { |
| pc.checkPermission(mountTable, FsAction.WRITE); |
| } |
| } |
| |
| boolean status = getDriver().put(mountTable, false, true); |
| AddMountTableEntryResponse response = |
| AddMountTableEntryResponse.newInstance(); |
| response.setStatus(status); |
| return response; |
| } |
| |
| @Override |
| public UpdateMountTableEntryResponse updateMountTableEntry( |
| UpdateMountTableEntryRequest request) throws IOException { |
| MountTable mountTable = request.getEntry(); |
| if (mountTable != null) { |
| RouterPermissionChecker pc = RouterAdminServer.getPermissionChecker(); |
| if (pc != null) { |
| pc.checkPermission(mountTable, FsAction.WRITE); |
| } |
| } |
| |
| boolean status = getDriver().put(mountTable, true, true); |
| UpdateMountTableEntryResponse response = |
| UpdateMountTableEntryResponse.newInstance(); |
| response.setStatus(status); |
| return response; |
| } |
| |
| @Override |
| public RemoveMountTableEntryResponse removeMountTableEntry( |
| RemoveMountTableEntryRequest request) throws IOException { |
| final String srcPath = request.getSrcPath(); |
| final MountTable partial = MountTable.newInstance(); |
| partial.setSourcePath(srcPath); |
| final Query<MountTable> query = new Query<>(partial); |
| final MountTable deleteEntry = getDriver().get(getRecordClass(), query); |
| |
| boolean status = false; |
| if (deleteEntry != null) { |
| RouterPermissionChecker pc = RouterAdminServer.getPermissionChecker(); |
| if (pc != null) { |
| pc.checkPermission(deleteEntry, FsAction.WRITE); |
| } |
| status = getDriver().remove(deleteEntry); |
| } |
| |
| RemoveMountTableEntryResponse response = |
| RemoveMountTableEntryResponse.newInstance(); |
| response.setStatus(status); |
| return response; |
| } |
| |
| @Override |
| public GetMountTableEntriesResponse getMountTableEntries( |
| GetMountTableEntriesRequest request) throws IOException { |
| RouterPermissionChecker pc = |
| RouterAdminServer.getPermissionChecker(); |
| // Get all values from the cache |
| List<MountTable> records = getCachedRecords(); |
| |
| // Sort and filter |
| Collections.sort(records, MountTable.SOURCE_COMPARATOR); |
| String reqSrcPath = request.getSrcPath(); |
| if (reqSrcPath != null && !reqSrcPath.isEmpty()) { |
| // Return only entries beneath this path |
| Iterator<MountTable> it = records.iterator(); |
| while (it.hasNext()) { |
| MountTable record = it.next(); |
| String srcPath = record.getSourcePath(); |
| if (!srcPath.startsWith(reqSrcPath)) { |
| it.remove(); |
| } else if (pc != null) { |
| // do the READ permission check |
| try { |
| pc.checkPermission(record, FsAction.READ); |
| } catch (AccessControlException ignored) { |
| // Remove this mount table entry if it cannot |
| // be accessed by current user. |
| it.remove(); |
| } |
| } |
| } |
| } |
| |
| GetMountTableEntriesResponse response = |
| GetMountTableEntriesResponse.newInstance(); |
| response.setEntries(records); |
| response.setTimestamp(Time.now()); |
| return response; |
| } |
| } |