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apache / hadoop-site / 952d547359cafef280f0a0324055741b2ed55be1 / . / content / docs / r3.3.1 / hadoop-project-dist / hadoop-hdfs / build / source / hadoop-hdfs-project / hadoop-hdfs / target / api / org / apache / hadoop / hdfs / server / namenode / INodeReference.html
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<div class="subTitle">org.apache.hadoop.hdfs.server.namenode</div>
<h2 title="Class INodeReference" class="title">Class INodeReference</h2>
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<li>org.apache.hadoop.hdfs.server.namenode.INode</li>
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<ul class="inheritance">
<li>org.apache.hadoop.hdfs.server.namenode.INodeReference</li>
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<dt>All Implemented Interfaces:</dt>
<dd><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Comparable.html?is-external=true" title="class or interface in java.lang">Comparable</a>&lt;byte[]&gt;, org.apache.hadoop.hdfs.server.namenode.INodeAttributes, <a href="../../../../../../org/apache/hadoop/hdfs/util/Diff.Element.html" title="interface in org.apache.hadoop.hdfs.util">Diff.Element</a>&lt;byte[]&gt;</dd>
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<dl>
<dt>Direct Known Subclasses:</dt>
<dd><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.DstReference.html" title="class in org.apache.hadoop.hdfs.server.namenode">INodeReference.DstReference</a>, <a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.WithCount.html" title="class in org.apache.hadoop.hdfs.server.namenode">INodeReference.WithCount</a>, <a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.WithName.html" title="class in org.apache.hadoop.hdfs.server.namenode">INodeReference.WithName</a></dd>
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<pre>public abstract class <span class="typeNameLabel">INodeReference</span>
extends org.apache.hadoop.hdfs.server.namenode.INode</pre>
<div class="block">An anonymous reference to an inode.
This class and its subclasses are used to support multiple access paths.
A file/directory may have multiple access paths when it is stored in some
snapshots and it is renamed/moved to other locations.
For example,
(1) Suppose we have /abc/foo, say the inode of foo is inode(id=1000,name=foo)
(2) create snapshot s0 for /abc
(3) mv /abc/foo /xyz/bar, i.e. inode(id=1000,name=...) is renamed from "foo"
to "bar" and its parent becomes /xyz.
Then, /xyz/bar and /abc/.snapshot/s0/foo are two different access paths to
the same inode, inode(id=1000,name=bar).
With references, we have the following
- /abc has a child ref(id=1001,name=foo).
- /xyz has a child ref(id=1002)
- Both ref(id=1001,name=foo) and ref(id=1002) point to another reference,
ref(id=1003,count=2).
- Finally, ref(id=1003,count=2) points to inode(id=1000,name=bar).
Note 1: For a reference without name, e.g. ref(id=1002), it uses the name
of the referred inode.
Note 2: getParent() always returns the parent in the current state, e.g.
inode(id=1000,name=bar).getParent() returns /xyz but not /abc.</div>
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<th class="colFirst" scope="col">Modifier and Type</th>
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<td class="colFirst"><code>static class&nbsp;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.DstReference.html" title="class in org.apache.hadoop.hdfs.server.namenode">INodeReference.DstReference</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static class&nbsp;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.WithCount.html" title="class in org.apache.hadoop.hdfs.server.namenode">INodeReference.WithCount</a></span></code>
<div class="block">An anonymous reference with reference count.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static class&nbsp;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.WithName.html" title="class in org.apache.hadoop.hdfs.server.namenode">INodeReference.WithName</a></span></code>
<div class="block">A reference with a fixed name.</div>
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<h3>Nested classes/interfaces inherited from class&nbsp;org.apache.hadoop.hdfs.server.namenode.INode</h3>
<code><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INode.BlocksMapUpdateInfo.html" title="class in org.apache.hadoop.hdfs.server.namenode">INode.BlocksMapUpdateInfo</a>, <a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INode.Feature.html" title="interface in org.apache.hadoop.hdfs.server.namenode">INode.Feature</a>, <a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INode.QuotaDelta.html" title="class in org.apache.hadoop.hdfs.server.namenode">INode.QuotaDelta</a>, <a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INode.ReclaimContext.html" title="class in org.apache.hadoop.hdfs.server.namenode">INode.ReclaimContext</a></code></li>
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<h3>Nested classes/interfaces inherited from interface&nbsp;org.apache.hadoop.hdfs.server.namenode.INodeAttributes</h3>
<code><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeAttributes.SnapshotCopy.html" title="class in org.apache.hadoop.hdfs.server.namenode">INodeAttributes.SnapshotCopy</a></code></li>
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<h3>Fields inherited from class&nbsp;org.apache.hadoop.hdfs.server.namenode.INode</h3>
<code>LOG</code></li>
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<th class="colOne" scope="col">Constructor and Description</th>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.html#INodeReference-org.apache.hadoop.hdfs.server.namenode.INode-org.apache.hadoop.hdfs.server.namenode.INode-">INodeReference</a></span>(org.apache.hadoop.hdfs.server.namenode.INode&nbsp;parent,
org.apache.hadoop.hdfs.server.namenode.INode&nbsp;referred)</code>&nbsp;</td>
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<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd">&nbsp;</span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
</tr>
<tr id="i0" class="altColor">
<td class="colFirst"><code><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeDirectory.html" title="class in org.apache.hadoop.hdfs.server.namenode">INodeDirectory</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.html#asDirectory--">asDirectory</a></span>()</code>
<div class="block">Cast this inode to an <a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeDirectory.html" title="class in org.apache.hadoop.hdfs.server.namenode"><code>INodeDirectory</code></a>.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>org.apache.hadoop.hdfs.server.namenode.INodeFile</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.html#asFile--">asFile</a></span>()</code>
<div class="block">Cast this inode to an <code>INodeFile</code>.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.html" title="class in org.apache.hadoop.hdfs.server.namenode">INodeReference</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.html#asReference--">asReference</a></span>()</code>
<div class="block">Cast this inode to an <a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.html" title="class in org.apache.hadoop.hdfs.server.namenode"><code>INodeReference</code></a>.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>org.apache.hadoop.hdfs.server.namenode.INodeSymlink</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.html#asSymlink--">asSymlink</a></span>()</code>
<div class="block">Cast this inode to an <code>INodeSymlink</code>.</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.html#cleanSubtree-org.apache.hadoop.hdfs.server.namenode.INode.ReclaimContext-int-int-">cleanSubtree</a></span>(<a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INode.ReclaimContext.html" title="class in org.apache.hadoop.hdfs.server.namenode">INode.ReclaimContext</a>&nbsp;reclaimContext,
int&nbsp;snapshot,
int&nbsp;prior)</code>
<div class="block">Clean the subtree under this inode and collect the blocks from the descents
for further block deletion/update.</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.html#clear--">clear</a></span>()</code>
<div class="block">Clear references to other objects.</div>
</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code>org.apache.hadoop.hdfs.server.namenode.ContentSummaryComputationContext</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.html#computeContentSummary-int-org.apache.hadoop.hdfs.server.namenode.ContentSummaryComputationContext-">computeContentSummary</a></span>(int&nbsp;snapshotId,
org.apache.hadoop.hdfs.server.namenode.ContentSummaryComputationContext&nbsp;summary)</code>
<div class="block">Count subtree content summary with a <a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/ContentCounts.html" title="class in org.apache.hadoop.hdfs.server.namenode"><code>ContentCounts</code></a>.</div>
</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/QuotaCounts.html" title="class in org.apache.hadoop.hdfs.server.namenode">QuotaCounts</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.html#computeQuotaUsage-org.apache.hadoop.hdfs.server.blockmanagement.BlockStoragePolicySuite-byte-boolean-int-">computeQuotaUsage</a></span>(<a href="../../../../../../org/apache/hadoop/hdfs/server/blockmanagement/BlockStoragePolicySuite.html" title="class in org.apache.hadoop.hdfs.server.blockmanagement">BlockStoragePolicySuite</a>&nbsp;bsps,
byte&nbsp;blockStoragePolicyId,
boolean&nbsp;useCache,
int&nbsp;lastSnapshotId)</code>
<div class="block">Count subtree <a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/Quota.html#NAMESPACE"><code>Quota.NAMESPACE</code></a> and <a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/Quota.html#STORAGESPACE"><code>Quota.STORAGESPACE</code></a> usages.</div>
</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.html#destroyAndCollectBlocks-org.apache.hadoop.hdfs.server.namenode.INode.ReclaimContext-">destroyAndCollectBlocks</a></span>(<a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INode.ReclaimContext.html" title="class in org.apache.hadoop.hdfs.server.namenode">INode.ReclaimContext</a>&nbsp;reclaimContext)</code>
<div class="block">Destroy self and clear everything! If the INode is a file, this method
collects its blocks for further block deletion.</div>
</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.html#dumpTreeRecursively-java.io.PrintWriter-java.lang.StringBuilder-int-">dumpTreeRecursively</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/io/PrintWriter.html?is-external=true" title="class or interface in java.io">PrintWriter</a>&nbsp;out,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/StringBuilder.html?is-external=true" title="class or interface in java.lang">StringBuilder</a>&nbsp;prefix,
int&nbsp;snapshot)</code>
<div class="block">Dump tree recursively.</div>
</td>
</tr>
<tr id="i10" class="altColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.html#getAccessTime-int-">getAccessTime</a></span>(int&nbsp;snapshotId)</code>&nbsp;</td>
</tr>
<tr id="i11" class="rowColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.html#getDstSnapshotId--">getDstSnapshotId</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i12" class="altColor">
<td class="colFirst"><code>org.apache.hadoop.fs.permission.FsPermission</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.html#getFsPermission-int-">getFsPermission</a></span>(int&nbsp;snapshotId)</code>&nbsp;</td>
</tr>
<tr id="i13" class="rowColor">
<td class="colFirst"><code>short</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.html#getFsPermissionShort--">getFsPermissionShort</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i14" class="altColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.html#getGroupName-int-">getGroupName</a></span>(int&nbsp;snapshotId)</code>&nbsp;</td>
</tr>
<tr id="i15" class="rowColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.html#getId--">getId</a></span>()</code>
<div class="block">Get inode id</div>
</td>
</tr>
<tr id="i16" class="altColor">
<td class="colFirst"><code>byte[]</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.html#getLocalNameBytes--">getLocalNameBytes</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i17" class="rowColor">
<td class="colFirst"><code>byte</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.html#getLocalStoragePolicyID--">getLocalStoragePolicyID</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i18" class="altColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.html#getModificationTime-int-">getModificationTime</a></span>(int&nbsp;snapshotId)</code>&nbsp;</td>
</tr>
<tr id="i19" class="rowColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.html#getPermissionLong--">getPermissionLong</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i20" class="altColor">
<td class="colFirst"><code>org.apache.hadoop.fs.permission.PermissionStatus</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.html#getPermissionStatus-int-">getPermissionStatus</a></span>(int&nbsp;snapshotId)</code>
<div class="block">Get the <code>PermissionStatus</code></div>
</td>
</tr>
<tr id="i21" class="rowColor">
<td class="colFirst"><code><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/QuotaCounts.html" title="class in org.apache.hadoop.hdfs.server.namenode">QuotaCounts</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.html#getQuotaCounts--">getQuotaCounts</a></span>()</code>
<div class="block">Get the quota set for this inode</div>
</td>
</tr>
<tr id="i22" class="altColor">
<td class="colFirst"><code>org.apache.hadoop.hdfs.server.namenode.INode</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.html#getReferredINode--">getReferredINode</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i23" class="rowColor">
<td class="colFirst"><code>org.apache.hadoop.hdfs.server.namenode.INodeAttributes</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.html#getSnapshotINode-int-">getSnapshotINode</a></span>(int&nbsp;snapshotId)</code>&nbsp;</td>
</tr>
<tr id="i24" class="altColor">
<td class="colFirst"><code>byte</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.html#getStoragePolicyID--">getStoragePolicyID</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i25" class="rowColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.html#getUserName-int-">getUserName</a></span>(int&nbsp;snapshotId)</code>&nbsp;</td>
</tr>
<tr id="i26" class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.html#isDirectory--">isDirectory</a></span>()</code>
<div class="block">Check whether it's a directory</div>
</td>
</tr>
<tr id="i27" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.html#isFile--">isFile</a></span>()</code>
<div class="block">Check whether it's a file.</div>
</td>
</tr>
<tr id="i28" class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.html#isReference--">isReference</a></span>()</code>
<div class="block">Check whether it's a reference.</div>
</td>
</tr>
<tr id="i29" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.html#isSymlink--">isSymlink</a></span>()</code>
<div class="block">Check whether it's a symlink</div>
</td>
</tr>
<tr id="i30" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.html#setAccessTime-long-">setAccessTime</a></span>(long&nbsp;accessTime)</code>
<div class="block">Set last access time of inode.</div>
</td>
</tr>
<tr id="i31" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.html#setLocalName-byte:A-">setLocalName</a></span>(byte[]&nbsp;name)</code>
<div class="block">Set local file name</div>
</td>
</tr>
<tr id="i32" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.html#setModificationTime-long-">setModificationTime</a></span>(long&nbsp;modificationTime)</code>
<div class="block">Set the last modification time of inode.</div>
</td>
</tr>
<tr id="i33" class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.html#tryRemoveReference-org.apache.hadoop.hdfs.server.namenode.INode-">tryRemoveReference</a></span>(org.apache.hadoop.hdfs.server.namenode.INode&nbsp;inode)</code>
<div class="block">Try to remove the given reference and then return the reference count.</div>
</td>
</tr>
<tr id="i34" class="altColor">
<td class="colFirst"><code>org.apache.hadoop.hdfs.server.namenode.INode</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.html#updateModificationTime-long-int-">updateModificationTime</a></span>(long&nbsp;mtime,
int&nbsp;latestSnapshotId)</code>
<div class="block">Update modification time if it is larger than the current value.</div>
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<h3>Methods inherited from class&nbsp;org.apache.hadoop.hdfs.server.namenode.INode</h3>
<code>addSpaceConsumed, compareTo, computeAndConvertContentSummary, computeContentSummary, computeQuotaUsage, computeQuotaUsage, dumpTreeRecursively, dumpTreeRecursively, equals, getAccessTime, getAclFeature, getFsPermission, getFullPathName, getGroupName, getKey, getLocalName, getModificationTime, getObjectString, getParent, getParentReference, getParentString, getPathComponents, getPathComponents, getPathNames, getStoragePolicyIDForQuota, getUserName, getXAttrFeature, hashCode, isAncestorDirectory, isDeleted, isInCurrentState, isInLatestSnapshot, isLastReference, isQuotaSet, setAccessTime, setModificationTime, setParent, setParentReference, shouldRecordInSrcSnapshot, toDetailString, toString</code></li>
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<h3>Methods inherited from class&nbsp;java.lang.<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></h3>
<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li>
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<h3>Constructor Detail</h3>
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<pre>public&nbsp;INodeReference(org.apache.hadoop.hdfs.server.namenode.INode&nbsp;parent,
org.apache.hadoop.hdfs.server.namenode.INode&nbsp;referred)</pre>
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<pre>public static&nbsp;int&nbsp;tryRemoveReference(org.apache.hadoop.hdfs.server.namenode.INode&nbsp;inode)</pre>
<div class="block">Try to remove the given reference and then return the reference count.
If the given inode is not a reference, return -1;</div>
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<h4>getReferredINode</h4>
<pre>public final&nbsp;org.apache.hadoop.hdfs.server.namenode.INode&nbsp;getReferredINode()</pre>
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<pre>public final&nbsp;boolean&nbsp;isReference()</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></span></div>
<div class="block">Check whether it's a reference.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code>isReference</code>&nbsp;in class&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></dd>
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<pre>public final&nbsp;<a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.html" title="class in org.apache.hadoop.hdfs.server.namenode">INodeReference</a>&nbsp;asReference()</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></span></div>
<div class="block">Cast this inode to an <a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.html" title="class in org.apache.hadoop.hdfs.server.namenode"><code>INodeReference</code></a>.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code>asReference</code>&nbsp;in class&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></dd>
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<pre>public final&nbsp;boolean&nbsp;isFile()</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></span></div>
<div class="block">Check whether it's a file.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code>isFile</code>&nbsp;in class&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></dd>
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<pre>public final&nbsp;org.apache.hadoop.hdfs.server.namenode.INodeFile&nbsp;asFile()</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></span></div>
<div class="block">Cast this inode to an <code>INodeFile</code>.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code>asFile</code>&nbsp;in class&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></dd>
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<pre>public final&nbsp;boolean&nbsp;isDirectory()</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></span></div>
<div class="block">Check whether it's a directory</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>isDirectory</code>&nbsp;in interface&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INodeAttributes</code></dd>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code>isDirectory</code>&nbsp;in class&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></dd>
</dl>
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<pre>public final&nbsp;<a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeDirectory.html" title="class in org.apache.hadoop.hdfs.server.namenode">INodeDirectory</a>&nbsp;asDirectory()</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></span></div>
<div class="block">Cast this inode to an <a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeDirectory.html" title="class in org.apache.hadoop.hdfs.server.namenode"><code>INodeDirectory</code></a>.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code>asDirectory</code>&nbsp;in class&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></dd>
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<pre>public final&nbsp;boolean&nbsp;isSymlink()</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></span></div>
<div class="block">Check whether it's a symlink</div>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code>isSymlink</code>&nbsp;in class&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></dd>
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<pre>public final&nbsp;org.apache.hadoop.hdfs.server.namenode.INodeSymlink&nbsp;asSymlink()</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></span></div>
<div class="block">Cast this inode to an <code>INodeSymlink</code>.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code>asSymlink</code>&nbsp;in class&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></dd>
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<a name="getLocalNameBytes--">
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<h4>getLocalNameBytes</h4>
<pre>public&nbsp;byte[]&nbsp;getLocalNameBytes()</pre>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>null if the local name is null;
otherwise, return the local name byte array.</dd>
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<h4>setLocalName</h4>
<pre>public&nbsp;void&nbsp;setLocalName(byte[]&nbsp;name)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></span></div>
<div class="block">Set local file name</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>setLocalName</code>&nbsp;in class&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></dd>
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<a name="getId--">
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<h4>getId</h4>
<pre>public final&nbsp;long&nbsp;getId()</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></span></div>
<div class="block">Get inode id</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>getId</code>&nbsp;in class&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></dd>
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<h4>getPermissionStatus</h4>
<pre>public final&nbsp;org.apache.hadoop.fs.permission.PermissionStatus&nbsp;getPermissionStatus(int&nbsp;snapshotId)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></span></div>
<div class="block">Get the <code>PermissionStatus</code></div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>getPermissionStatus</code>&nbsp;in class&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></dd>
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<a name="getUserName-int-">
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<h4>getUserName</h4>
<pre>public final&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;getUserName(int&nbsp;snapshotId)</pre>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>getUserName</code>&nbsp;in class&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>snapshotId</code> - if it is not <code>Snapshot.CURRENT_STATE_ID</code>, get the result
from the given snapshot; otherwise, get the result from the
current inode.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>user name</dd>
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<a name="getGroupName-int-">
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<h4>getGroupName</h4>
<pre>public final&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;getGroupName(int&nbsp;snapshotId)</pre>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>getGroupName</code>&nbsp;in class&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>snapshotId</code> - if it is not <code>Snapshot.CURRENT_STATE_ID</code>, get the result
from the given snapshot; otherwise, get the result from the
current inode.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>group name</dd>
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<h4>getFsPermission</h4>
<pre>public final&nbsp;org.apache.hadoop.fs.permission.FsPermission&nbsp;getFsPermission(int&nbsp;snapshotId)</pre>
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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>getFsPermission</code>&nbsp;in class&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>snapshotId</code> - if it is not <code>Snapshot.CURRENT_STATE_ID</code>, get the result
from the given snapshot; otherwise, get the result from the
current inode.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>permission.</dd>
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<pre>public final&nbsp;short&nbsp;getFsPermissionShort()</pre>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the permission as a short.</dd>
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<h4>getPermissionLong</h4>
<pre>public&nbsp;long&nbsp;getPermissionLong()</pre>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the permission information as a long.</dd>
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<h4>getModificationTime</h4>
<pre>public final&nbsp;long&nbsp;getModificationTime(int&nbsp;snapshotId)</pre>
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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>getModificationTime</code>&nbsp;in class&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>snapshotId</code> - if it is not <code>Snapshot.CURRENT_STATE_ID</code>, get the result
from the given snapshot; otherwise, get the result from the
current inode.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>modification time.</dd>
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<h4>updateModificationTime</h4>
<pre>public final&nbsp;org.apache.hadoop.hdfs.server.namenode.INode&nbsp;updateModificationTime(long&nbsp;mtime,
int&nbsp;latestSnapshotId)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></span></div>
<div class="block">Update modification time if it is larger than the current value.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>updateModificationTime</code>&nbsp;in class&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></dd>
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<h4>setModificationTime</h4>
<pre>public final&nbsp;void&nbsp;setModificationTime(long&nbsp;modificationTime)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></span></div>
<div class="block">Set the last modification time of inode.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>setModificationTime</code>&nbsp;in class&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></dd>
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<pre>public final&nbsp;long&nbsp;getAccessTime(int&nbsp;snapshotId)</pre>
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<dd><code>getAccessTime</code>&nbsp;in class&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>snapshotId</code> - if it is not <code>Snapshot.CURRENT_STATE_ID</code>, get the result
from the given snapshot; otherwise, get the result from the
current inode.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>access time</dd>
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<h4>setAccessTime</h4>
<pre>public final&nbsp;void&nbsp;setAccessTime(long&nbsp;accessTime)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></span></div>
<div class="block">Set last access time of inode.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>setAccessTime</code>&nbsp;in class&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></dd>
</dl>
</li>
</ul>
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<h4>getStoragePolicyID</h4>
<pre>public final&nbsp;byte&nbsp;getStoragePolicyID()</pre>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>getStoragePolicyID</code>&nbsp;in class&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the latest block storage policy id of the INode. Specifically,
if a storage policy is directly specified on the INode then return the ID
of that policy. Otherwise follow the latest parental path and return the
ID of the first specified storage policy.</dd>
</dl>
</li>
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<h4>getLocalStoragePolicyID</h4>
<pre>public final&nbsp;byte&nbsp;getLocalStoragePolicyID()</pre>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>getLocalStoragePolicyID</code>&nbsp;in class&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the storage policy directly specified on the INode. Return
<code>HdfsConstants.BLOCK_STORAGE_POLICY_ID_UNSPECIFIED</code> if no policy has
been specified.</dd>
</dl>
</li>
</ul>
<a name="cleanSubtree-org.apache.hadoop.hdfs.server.namenode.INode.ReclaimContext-int-int-">
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<h4>cleanSubtree</h4>
<pre>public&nbsp;void&nbsp;cleanSubtree(<a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INode.ReclaimContext.html" title="class in org.apache.hadoop.hdfs.server.namenode">INode.ReclaimContext</a>&nbsp;reclaimContext,
int&nbsp;snapshot,
int&nbsp;prior)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></span></div>
<div class="block">Clean the subtree under this inode and collect the blocks from the descents
for further block deletion/update. The current inode can either resides in
the current tree or be stored as a snapshot copy.
<pre>
In general, we have the following rules.
1. When deleting a file/directory in the current tree, we have different
actions according to the type of the node to delete.
1.1 The current inode (this) is an <code>INodeFile</code>.
1.1.1 If <code> prior</code> is null, there is no snapshot taken on ancestors
before. Thus we simply destroy (i.e., to delete completely, no need to save
snapshot copy) the current INode and collect its blocks for further
cleansing.
1.1.2 Else do nothing since the current INode will be stored as a snapshot
copy.
1.2 The current inode is an <a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeDirectory.html" title="class in org.apache.hadoop.hdfs.server.namenode"><code>INodeDirectory</code></a>.
1.2.1 If <code> prior</code> is null, there is no snapshot taken on ancestors
before. Similarly, we destroy the whole subtree and collect blocks.
1.2.2 Else do nothing with the current INode. Recursively clean its
children.
1.3 The current inode is a file with snapshot.
Call recordModification(..) to capture the current states.
Mark the INode as deleted.
1.4 The current inode is an <a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeDirectory.html" title="class in org.apache.hadoop.hdfs.server.namenode"><code>INodeDirectory</code></a> with snapshot feature.
Call recordModification(..) to capture the current states.
Destroy files/directories created after the latest snapshot
(i.e., the inodes stored in the created list of the latest snapshot).
Recursively clean remaining children.
2. When deleting a snapshot.
2.1 To clean <code>INodeFile</code>: do nothing.
2.2 To clean <a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeDirectory.html" title="class in org.apache.hadoop.hdfs.server.namenode"><code>INodeDirectory</code></a>: recursively clean its children.
2.3 To clean INodeFile with snapshot: delete the corresponding snapshot in
its diff list.
2.4 To clean <a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeDirectory.html" title="class in org.apache.hadoop.hdfs.server.namenode"><code>INodeDirectory</code></a> with snapshot: delete the corresponding
snapshot in its diff list. Recursively clean its children.
</pre></div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>cleanSubtree</code>&nbsp;in class&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>reclaimContext</code> - Record blocks and inodes that need to be reclaimed.</dd>
<dd><code>snapshot</code> - The id of the snapshot to delete.
<code>Snapshot.CURRENT_STATE_ID</code> means to delete the current
file/directory.</dd>
<dd><code>prior</code> - The id of the latest snapshot before the to-be-deleted snapshot.
When deleting a current inode, this parameter captures the latest
snapshot.</dd>
</dl>
</li>
</ul>
<a name="destroyAndCollectBlocks-org.apache.hadoop.hdfs.server.namenode.INode.ReclaimContext-">
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<h4>destroyAndCollectBlocks</h4>
<pre>public&nbsp;void&nbsp;destroyAndCollectBlocks(<a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INode.ReclaimContext.html" title="class in org.apache.hadoop.hdfs.server.namenode">INode.ReclaimContext</a>&nbsp;reclaimContext)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></span></div>
<div class="block">Destroy self and clear everything! If the INode is a file, this method
collects its blocks for further block deletion. If the INode is a
directory, the method goes down the subtree and collects blocks from the
descents, and clears its parent/children references as well. The method
also clears the diff list if the INode contains snapshot diff list.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>destroyAndCollectBlocks</code>&nbsp;in class&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>reclaimContext</code> - Record blocks and inodes that need to be reclaimed.</dd>
</dl>
</li>
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<a name="computeContentSummary-int-org.apache.hadoop.hdfs.server.namenode.ContentSummaryComputationContext-">
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<h4>computeContentSummary</h4>
<pre>public&nbsp;org.apache.hadoop.hdfs.server.namenode.ContentSummaryComputationContext&nbsp;computeContentSummary(int&nbsp;snapshotId,
org.apache.hadoop.hdfs.server.namenode.ContentSummaryComputationContext&nbsp;summary)
throws org.apache.hadoop.security.AccessControlException</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></span></div>
<div class="block">Count subtree content summary with a <a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/ContentCounts.html" title="class in org.apache.hadoop.hdfs.server.namenode"><code>ContentCounts</code></a>.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>computeContentSummary</code>&nbsp;in class&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>snapshotId</code> - Specify the time range for the calculation. If this
parameter equals to <code>Snapshot.CURRENT_STATE_ID</code>,
the result covers both the current states and all the
snapshots. Otherwise the result only covers all the
files/directories contained in the specific snapshot.</dd>
<dd><code>summary</code> - the context object holding counts for the subtree.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The same objects as summary.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code>org.apache.hadoop.security.AccessControlException</code></dd>
</dl>
</li>
</ul>
<a name="computeQuotaUsage-org.apache.hadoop.hdfs.server.blockmanagement.BlockStoragePolicySuite-byte-boolean-int-">
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<h4>computeQuotaUsage</h4>
<pre>public&nbsp;<a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/QuotaCounts.html" title="class in org.apache.hadoop.hdfs.server.namenode">QuotaCounts</a>&nbsp;computeQuotaUsage(<a href="../../../../../../org/apache/hadoop/hdfs/server/blockmanagement/BlockStoragePolicySuite.html" title="class in org.apache.hadoop.hdfs.server.blockmanagement">BlockStoragePolicySuite</a>&nbsp;bsps,
byte&nbsp;blockStoragePolicyId,
boolean&nbsp;useCache,
int&nbsp;lastSnapshotId)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></span></div>
<div class="block">Count subtree <a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/Quota.html#NAMESPACE"><code>Quota.NAMESPACE</code></a> and <a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/Quota.html#STORAGESPACE"><code>Quota.STORAGESPACE</code></a> usages.
With the existence of <a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.html" title="class in org.apache.hadoop.hdfs.server.namenode"><code>INodeReference</code></a>, the same inode and its
subtree may be referred by multiple <a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.WithName.html" title="class in org.apache.hadoop.hdfs.server.namenode"><code>INodeReference.WithName</code></a> nodes and a
<a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.DstReference.html" title="class in org.apache.hadoop.hdfs.server.namenode"><code>INodeReference.DstReference</code></a> node. To avoid circles while quota usage computation,
we have the following rules:
<pre>
1. For a <a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.DstReference.html" title="class in org.apache.hadoop.hdfs.server.namenode"><code>INodeReference.DstReference</code></a> node, since the node must be in the current
tree (or has been deleted as the end point of a series of rename
operations), we compute the quota usage of the referred node (and its
subtree) in the regular manner, i.e., including every inode in the current
tree and in snapshot copies, as well as the size of diff list.
2. For a <a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.WithName.html" title="class in org.apache.hadoop.hdfs.server.namenode"><code>INodeReference.WithName</code></a> node, since the node must be in a snapshot, we
only count the quota usage for those nodes that still existed at the
creation time of the snapshot associated with the <a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.WithName.html" title="class in org.apache.hadoop.hdfs.server.namenode"><code>INodeReference.WithName</code></a> node.
We do not count in the size of the diff list.
</pre></div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>computeQuotaUsage</code>&nbsp;in class&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>bsps</code> - Block storage policy suite to calculate intended storage type usage</dd>
<dd><code>blockStoragePolicyId</code> - block storage policy id of the current INode</dd>
<dd><code>useCache</code> - Whether to use cached quota usage. Note that
<a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.WithName.html" title="class in org.apache.hadoop.hdfs.server.namenode"><code>INodeReference.WithName</code></a> node never uses cache for its subtree.</dd>
<dd><code>lastSnapshotId</code> - <code>Snapshot.CURRENT_STATE_ID</code> indicates the
computation is in the current tree. Otherwise the id
indicates the computation range for a
<a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeReference.WithName.html" title="class in org.apache.hadoop.hdfs.server.namenode"><code>INodeReference.WithName</code></a> node.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The subtree quota counts.</dd>
</dl>
</li>
</ul>
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<h4>getSnapshotINode</h4>
<pre>public final&nbsp;org.apache.hadoop.hdfs.server.namenode.INodeAttributes&nbsp;getSnapshotINode(int&nbsp;snapshotId)</pre>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code>getSnapshotINode</code>&nbsp;in class&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>if the given snapshot id is <code>Snapshot.CURRENT_STATE_ID</code>,
return this; otherwise return the corresponding snapshot inode.</dd>
</dl>
</li>
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<h4>getQuotaCounts</h4>
<pre>public&nbsp;<a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/QuotaCounts.html" title="class in org.apache.hadoop.hdfs.server.namenode">QuotaCounts</a>&nbsp;getQuotaCounts()</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></span></div>
<div class="block">Get the quota set for this inode</div>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code>getQuotaCounts</code>&nbsp;in class&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the quota counts. The count is -1 if it is not set.</dd>
</dl>
</li>
</ul>
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<h4>clear</h4>
<pre>public final&nbsp;void&nbsp;clear()</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></span></div>
<div class="block">Clear references to other objects.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code>clear</code>&nbsp;in class&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></dd>
</dl>
</li>
</ul>
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<h4>dumpTreeRecursively</h4>
<pre>public&nbsp;void&nbsp;dumpTreeRecursively(<a href="https://docs.oracle.com/javase/8/docs/api/java/io/PrintWriter.html?is-external=true" title="class or interface in java.io">PrintWriter</a>&nbsp;out,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/StringBuilder.html?is-external=true" title="class or interface in java.lang">StringBuilder</a>&nbsp;prefix,
int&nbsp;snapshot)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></span></div>
<div class="block">Dump tree recursively.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code>dumpTreeRecursively</code>&nbsp;in class&nbsp;<code>org.apache.hadoop.hdfs.server.namenode.INode</code></dd>
<dd><code>prefix</code> - The prefix string that each line should print.</dd>
</dl>
</li>
</ul>
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<h4>getDstSnapshotId</h4>
<pre>public&nbsp;int&nbsp;getDstSnapshotId()</pre>
</li>
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</li>
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