| /** |
| * 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.hbase.security.access; |
| |
| import java.io.IOException; |
| import java.util.Map; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.FileStatus; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.hbase.HBaseInterfaceAudience; |
| import org.apache.hadoop.hbase.HConstants; |
| import org.apache.hadoop.hbase.TableName; |
| import org.apache.hadoop.hbase.master.HMaster; |
| import org.apache.hadoop.hbase.master.cleaner.BaseHFileCleanerDelegate; |
| import org.apache.yetus.audience.InterfaceAudience; |
| import org.apache.yetus.audience.InterfaceStability; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Implementation of a file cleaner that checks if a empty directory with no subdirs and subfiles is |
| * deletable when user scan snapshot feature is enabled |
| */ |
| @InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.CONFIG) |
| @InterfaceStability.Evolving |
| public class SnapshotScannerHDFSAclCleaner extends BaseHFileCleanerDelegate { |
| private static final Logger LOG = LoggerFactory.getLogger(SnapshotScannerHDFSAclCleaner.class); |
| |
| private HMaster master; |
| private boolean userScanSnapshotEnabled = false; |
| |
| @Override |
| public void init(Map<String, Object> params) { |
| if (params != null && params.containsKey(HMaster.MASTER)) { |
| this.master = (HMaster) params.get(HMaster.MASTER); |
| } |
| } |
| |
| @Override |
| public void setConf(Configuration conf) { |
| super.setConf(conf); |
| userScanSnapshotEnabled = SnapshotScannerHDFSAclHelper.isAclSyncToHdfsEnabled(conf); |
| } |
| |
| @Override |
| protected boolean isFileDeletable(FileStatus fStat) { |
| // This plugin does not handle the file deletions, so return true by default |
| return true; |
| } |
| |
| @Override |
| public boolean isEmptyDirDeletable(Path dir) { |
| if (userScanSnapshotEnabled) { |
| /* |
| * If user scan snapshot feature is enabled(see HBASE-21995), then when namespace or table |
| * exists, the archive namespace or table directories should not be deleted because the HDFS |
| * acls are set at these directories; the archive data directory should not be deleted because |
| * the HDFS acls of global permission is set at this directory. |
| */ |
| return isEmptyArchiveDirDeletable(dir); |
| } |
| return true; |
| } |
| |
| private boolean isEmptyArchiveDirDeletable(Path dir) { |
| try { |
| if (isArchiveDataDir(dir)) { |
| return false; |
| } else if (isArchiveNamespaceDir(dir) && namespaceExists(dir.getName())) { |
| return false; |
| } else if (isArchiveTableDir(dir) |
| && tableExists(TableName.valueOf(dir.getParent().getName(), dir.getName()))) { |
| return false; |
| } |
| return true; |
| } catch (IOException e) { |
| LOG.warn("Check if empty dir {} is deletable error", dir, e); |
| return false; |
| } |
| } |
| |
| @InterfaceAudience.Private |
| static boolean isArchiveDataDir(Path path) { |
| if (path != null && path.getName().equals(HConstants.BASE_NAMESPACE_DIR)) { |
| Path parent = path.getParent(); |
| return parent != null && parent.getName().equals(HConstants.HFILE_ARCHIVE_DIRECTORY); |
| } |
| return false; |
| } |
| |
| @InterfaceAudience.Private |
| static boolean isArchiveNamespaceDir(Path path) { |
| return path != null && isArchiveDataDir(path.getParent()); |
| } |
| |
| @InterfaceAudience.Private |
| static boolean isArchiveTableDir(Path path) { |
| return path != null && isArchiveNamespaceDir(path.getParent()); |
| } |
| |
| private boolean namespaceExists(String namespace) throws IOException { |
| return master != null && master.listNamespaces().contains(namespace); |
| } |
| |
| private boolean tableExists(TableName tableName) throws IOException { |
| return master != null && master.getTableDescriptors().exists(tableName); |
| } |
| } |