001/**
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hdfs.server.namenode;
019
020import org.apache.hadoop.classification.InterfaceAudience;
021import org.apache.hadoop.fs.permission.PermissionStatus;
022
023import com.google.common.base.Preconditions;
024
025/**
026 * The attributes of an inode.
027 */
028@InterfaceAudience.Private
029public interface INodeDirectoryAttributes extends INodeAttributes {
030  public Quota.Counts getQuotaCounts();
031
032  public boolean metadataEquals(INodeDirectoryAttributes other);
033  
034  /** A copy of the inode directory attributes */
035  public static class SnapshotCopy extends INodeAttributes.SnapshotCopy
036      implements INodeDirectoryAttributes {
037    public SnapshotCopy(byte[] name, PermissionStatus permissions,
038        AclFeature aclFeature, long modificationTime, 
039        XAttrFeature xAttrsFeature) {
040      super(name, permissions, aclFeature, modificationTime, 0L, xAttrsFeature);
041    }
042
043    public SnapshotCopy(INodeDirectory dir) {
044      super(dir);
045    }
046
047    @Override
048    public Quota.Counts getQuotaCounts() {
049      return Quota.Counts.newInstance(-1, -1);
050    }
051
052    @Override
053    public boolean metadataEquals(INodeDirectoryAttributes other) {
054      return other != null
055          && getQuotaCounts().equals(other.getQuotaCounts())
056          && getPermissionLong() == other.getPermissionLong()
057          && getAclFeature() == other.getAclFeature()
058          && getXAttrFeature() == other.getXAttrFeature();
059    }
060  }
061
062  public static class CopyWithQuota extends INodeDirectoryAttributes.SnapshotCopy {
063    private final long nsQuota;
064    private final long dsQuota;
065
066
067    public CopyWithQuota(byte[] name, PermissionStatus permissions,
068        AclFeature aclFeature, long modificationTime, long nsQuota,
069        long dsQuota, XAttrFeature xAttrsFeature) {
070      super(name, permissions, aclFeature, modificationTime, xAttrsFeature);
071      this.nsQuota = nsQuota;
072      this.dsQuota = dsQuota;
073    }
074
075    public CopyWithQuota(INodeDirectory dir) {
076      super(dir);
077      Preconditions.checkArgument(dir.isQuotaSet());
078      final Quota.Counts q = dir.getQuotaCounts();
079      this.nsQuota = q.get(Quota.NAMESPACE);
080      this.dsQuota = q.get(Quota.DISKSPACE);
081    }
082    
083    @Override
084    public Quota.Counts getQuotaCounts() {
085      return Quota.Counts.newInstance(nsQuota, dsQuota);
086    }
087  }
088}