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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 / FSPermissionChecker.html
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<div class="subTitle">org.apache.hadoop.hdfs.server.namenode</div>
<h2 title="Class FSPermissionChecker" class="title">Class FSPermissionChecker</h2>
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<li>org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker</li>
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<dt>All Implemented Interfaces:</dt>
<dd><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeAttributeProvider.AccessControlEnforcer.html" title="interface in org.apache.hadoop.hdfs.server.namenode">INodeAttributeProvider.AccessControlEnforcer</a></dd>
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<pre>public class <span class="typeNameLabel">FSPermissionChecker</span>
extends <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>
implements <a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeAttributeProvider.AccessControlEnforcer.html" title="interface in org.apache.hadoop.hdfs.server.namenode">INodeAttributeProvider.AccessControlEnforcer</a></pre>
<div class="block">Class that helps in checking file system permission.
The state of this class need not be synchronized as it has data structures that
are read-only.
Some of the helper methods are guarded by <code>FSNamesystem.readLock()</code>.</div>
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<th class="colFirst" scope="col">Modifier</th>
<th class="colLast" scope="col">Constructor and Description</th>
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<td class="colFirst"><code>protected </code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/FSPermissionChecker.html#FSPermissionChecker-java.lang.String-java.lang.String-org.apache.hadoop.security.UserGroupInformation-org.apache.hadoop.hdfs.server.namenode.INodeAttributeProvider-">FSPermissionChecker</a></span>(<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;fsOwner,
<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;supergroup,
org.apache.hadoop.security.UserGroupInformation&nbsp;callerUgi,
<a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeAttributeProvider.html" title="class in org.apache.hadoop.hdfs.server.namenode">INodeAttributeProvider</a>&nbsp;attributeProvider)</code>&nbsp;</td>
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<tr class="rowColor">
<td class="colFirst"><code>protected </code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/FSPermissionChecker.html#FSPermissionChecker-java.lang.String-java.lang.String-org.apache.hadoop.security.UserGroupInformation-org.apache.hadoop.hdfs.server.namenode.INodeAttributeProvider-boolean-">FSPermissionChecker</a></span>(<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;fsOwner,
<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;supergroup,
org.apache.hadoop.security.UserGroupInformation&nbsp;callerUgi,
<a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeAttributeProvider.html" title="class in org.apache.hadoop.hdfs.server.namenode">INodeAttributeProvider</a>&nbsp;attributeProvider,
boolean&nbsp;useAuthorizationWithContextAPI)</code>&nbsp;</td>
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<th class="colFirst" scope="col">Modifier and Type</th>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/FSPermissionChecker.html#checkPermission-org.apache.hadoop.hdfs.server.namenode.CachePool-org.apache.hadoop.fs.permission.FsAction-">checkPermission</a></span>(org.apache.hadoop.hdfs.server.namenode.CachePool&nbsp;pool,
org.apache.hadoop.fs.permission.FsAction&nbsp;access)</code>
<div class="block">Whether a cache pool can be accessed by the current context</div>
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</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/FSPermissionChecker.html#checkPermission-java.lang.String-java.lang.String-org.apache.hadoop.security.UserGroupInformation-org.apache.hadoop.hdfs.server.namenode.INodeAttributes:A-org.apache.hadoop.hdfs.server.namenode.INode:A-byte:A:A-int-java.lang.String-int-boolean-org.apache.hadoop.fs.permission.FsAction-org.apache.hadoop.fs.permission.FsAction-org.apache.hadoop.fs.permission.FsAction-org.apache.hadoop.fs.permission.FsAction-boolean-">checkPermission</a></span>(<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;fsOwner,
<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;supergroup,
org.apache.hadoop.security.UserGroupInformation&nbsp;callerUgi,
org.apache.hadoop.hdfs.server.namenode.INodeAttributes[]&nbsp;inodeAttrs,
org.apache.hadoop.hdfs.server.namenode.INode[]&nbsp;inodes,
byte[][]&nbsp;components,
int&nbsp;snapshotId,
<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;path,
int&nbsp;ancestorIndex,
boolean&nbsp;doCheckOwner,
org.apache.hadoop.fs.permission.FsAction&nbsp;ancestorAccess,
org.apache.hadoop.fs.permission.FsAction&nbsp;parentAccess,
org.apache.hadoop.fs.permission.FsAction&nbsp;access,
org.apache.hadoop.fs.permission.FsAction&nbsp;subAccess,
boolean&nbsp;ignoreEmptyDir)</code>
<div class="block">Checks permission on a file system object.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/FSPermissionChecker.html#checkPermissionWithContext-org.apache.hadoop.hdfs.server.namenode.INodeAttributeProvider.AuthorizationContext-">checkPermissionWithContext</a></span>(<a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeAttributeProvider.AuthorizationContext.html" title="class in org.apache.hadoop.hdfs.server.namenode">INodeAttributeProvider.AuthorizationContext</a>&nbsp;authzContext)</code>
<div class="block">Checks permission on a file system object.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/FSPermissionChecker.html#checkSuperuserPrivilege--">checkSuperuserPrivilege</a></span>()</code>
<div class="block">Verify if the caller has the required permission.</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeAttributeProvider.html" title="class in org.apache.hadoop.hdfs.server.namenode">INodeAttributeProvider</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/FSPermissionChecker.html#getAttributesProvider--">getAttributesProvider</a></span>()</code>&nbsp;</td>
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<tr id="i5" 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/FSPermissionChecker.html#getUser--">getUser</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/FSPermissionChecker.html#isMemberOfGroup-java.lang.String-">isMemberOfGroup</a></span>(<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;group)</code>&nbsp;</td>
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<tr id="i7" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/FSPermissionChecker.html#isSuperUser--">isSuperUser</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/FSPermissionChecker.html#setOperationType-java.lang.String-">setOperationType</a></span>(<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;opType)</code>&nbsp;</td>
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<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#equals-java.lang.Object-" title="class or interface in java.lang">equals</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#hashCode--" title="class or interface in java.lang">hashCode</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#toString--" title="class or interface in java.lang">toString</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>
<a name="FSPermissionChecker-java.lang.String-java.lang.String-org.apache.hadoop.security.UserGroupInformation-org.apache.hadoop.hdfs.server.namenode.INodeAttributeProvider-">
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<h4>FSPermissionChecker</h4>
<pre>protected&nbsp;FSPermissionChecker(<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;fsOwner,
<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;supergroup,
org.apache.hadoop.security.UserGroupInformation&nbsp;callerUgi,
<a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeAttributeProvider.html" title="class in org.apache.hadoop.hdfs.server.namenode">INodeAttributeProvider</a>&nbsp;attributeProvider)</pre>
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<h4>FSPermissionChecker</h4>
<pre>protected&nbsp;FSPermissionChecker(<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;fsOwner,
<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;supergroup,
org.apache.hadoop.security.UserGroupInformation&nbsp;callerUgi,
<a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeAttributeProvider.html" title="class in org.apache.hadoop.hdfs.server.namenode">INodeAttributeProvider</a>&nbsp;attributeProvider,
boolean&nbsp;useAuthorizationWithContextAPI)</pre>
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<h4>setOperationType</h4>
<pre>public static&nbsp;void&nbsp;setOperationType(<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;opType)</pre>
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<pre>public&nbsp;boolean&nbsp;isMemberOfGroup(<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;group)</pre>
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<h4>getUser</h4>
<pre>public&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;getUser()</pre>
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<pre>public&nbsp;boolean&nbsp;isSuperUser()</pre>
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<h4>getAttributesProvider</h4>
<pre>public&nbsp;<a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeAttributeProvider.html" title="class in org.apache.hadoop.hdfs.server.namenode">INodeAttributeProvider</a>&nbsp;getAttributesProvider()</pre>
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<h4>checkSuperuserPrivilege</h4>
<pre>public&nbsp;void&nbsp;checkSuperuserPrivilege()
throws org.apache.hadoop.security.AccessControlException</pre>
<div class="block">Verify if the caller has the required permission. This will result into
an exception if the caller is not allowed to access the resource.</div>
<dl>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code>org.apache.hadoop.security.AccessControlException</code></dd>
</dl>
</li>
</ul>
<a name="checkPermission-java.lang.String-java.lang.String-org.apache.hadoop.security.UserGroupInformation-org.apache.hadoop.hdfs.server.namenode.INodeAttributes:A-org.apache.hadoop.hdfs.server.namenode.INode:A-byte:A:A-int-java.lang.String-int-boolean-org.apache.hadoop.fs.permission.FsAction-org.apache.hadoop.fs.permission.FsAction-org.apache.hadoop.fs.permission.FsAction-org.apache.hadoop.fs.permission.FsAction-boolean-">
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<h4>checkPermission</h4>
<pre>public&nbsp;void&nbsp;checkPermission(<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;fsOwner,
<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;supergroup,
org.apache.hadoop.security.UserGroupInformation&nbsp;callerUgi,
org.apache.hadoop.hdfs.server.namenode.INodeAttributes[]&nbsp;inodeAttrs,
org.apache.hadoop.hdfs.server.namenode.INode[]&nbsp;inodes,
byte[][]&nbsp;components,
int&nbsp;snapshotId,
<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;path,
int&nbsp;ancestorIndex,
boolean&nbsp;doCheckOwner,
org.apache.hadoop.fs.permission.FsAction&nbsp;ancestorAccess,
org.apache.hadoop.fs.permission.FsAction&nbsp;parentAccess,
org.apache.hadoop.fs.permission.FsAction&nbsp;access,
org.apache.hadoop.fs.permission.FsAction&nbsp;subAccess,
boolean&nbsp;ignoreEmptyDir)
throws org.apache.hadoop.security.AccessControlException</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeAttributeProvider.AccessControlEnforcer.html#checkPermission-java.lang.String-java.lang.String-org.apache.hadoop.security.UserGroupInformation-org.apache.hadoop.hdfs.server.namenode.INodeAttributes:A-org.apache.hadoop.hdfs.server.namenode.INode:A-byte:A:A-int-java.lang.String-int-boolean-org.apache.hadoop.fs.permission.FsAction-org.apache.hadoop.fs.permission.FsAction-org.apache.hadoop.fs.permission.FsAction-org.apache.hadoop.fs.permission.FsAction-boolean-">INodeAttributeProvider.AccessControlEnforcer</a></code></span></div>
<div class="block">Checks permission on a file system object. Has to throw an Exception
if the filesystem object is not accessible by the calling Ugi.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeAttributeProvider.AccessControlEnforcer.html#checkPermission-java.lang.String-java.lang.String-org.apache.hadoop.security.UserGroupInformation-org.apache.hadoop.hdfs.server.namenode.INodeAttributes:A-org.apache.hadoop.hdfs.server.namenode.INode:A-byte:A:A-int-java.lang.String-int-boolean-org.apache.hadoop.fs.permission.FsAction-org.apache.hadoop.fs.permission.FsAction-org.apache.hadoop.fs.permission.FsAction-org.apache.hadoop.fs.permission.FsAction-boolean-">checkPermission</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeAttributeProvider.AccessControlEnforcer.html" title="interface in org.apache.hadoop.hdfs.server.namenode">INodeAttributeProvider.AccessControlEnforcer</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>fsOwner</code> - Filesystem owner (The Namenode user)</dd>
<dd><code>supergroup</code> - super user geoup</dd>
<dd><code>callerUgi</code> - UserGroupInformation of the caller</dd>
<dd><code>inodeAttrs</code> - Array of INode attributes for each path element in the
the path</dd>
<dd><code>inodes</code> - Array of INodes for each path element in the path</dd>
<dd><code>components</code> - Array of byte arrays of the LocalName</dd>
<dd><code>snapshotId</code> - the snapshotId of the requested path</dd>
<dd><code>path</code> - Path String</dd>
<dd><code>ancestorIndex</code> - Index of ancestor</dd>
<dd><code>doCheckOwner</code> - perform ownership check</dd>
<dd><code>ancestorAccess</code> - The access required by the ancestor of the path.</dd>
<dd><code>parentAccess</code> - The access required by the parent of the path.</dd>
<dd><code>access</code> - The access required by the path.</dd>
<dd><code>subAccess</code> - If path is a directory, It is the access required of
the path and all the sub-directories. If path is not a
directory, there should ideally be no effect.</dd>
<dd><code>ignoreEmptyDir</code> - Ignore permission checking for empty directory?</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code>org.apache.hadoop.security.AccessControlException</code></dd>
</dl>
</li>
</ul>
<a name="checkPermissionWithContext-org.apache.hadoop.hdfs.server.namenode.INodeAttributeProvider.AuthorizationContext-">
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<h4>checkPermissionWithContext</h4>
<pre>public&nbsp;void&nbsp;checkPermissionWithContext(<a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeAttributeProvider.AuthorizationContext.html" title="class in org.apache.hadoop.hdfs.server.namenode">INodeAttributeProvider.AuthorizationContext</a>&nbsp;authzContext)
throws org.apache.hadoop.security.AccessControlException</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeAttributeProvider.AccessControlEnforcer.html#checkPermissionWithContext-org.apache.hadoop.hdfs.server.namenode.INodeAttributeProvider.AuthorizationContext-">INodeAttributeProvider.AccessControlEnforcer</a></code></span></div>
<div class="block">Checks permission on a file system object. Has to throw an Exception
if the filesystem object is not accessessible by the calling Ugi.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeAttributeProvider.AccessControlEnforcer.html#checkPermissionWithContext-org.apache.hadoop.hdfs.server.namenode.INodeAttributeProvider.AuthorizationContext-">checkPermissionWithContext</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeAttributeProvider.AccessControlEnforcer.html" title="interface in org.apache.hadoop.hdfs.server.namenode">INodeAttributeProvider.AccessControlEnforcer</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>authzContext</code> - an <a href="../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeAttributeProvider.AuthorizationContext.html" title="class in org.apache.hadoop.hdfs.server.namenode"><code>INodeAttributeProvider.AuthorizationContext</code></a> object encapsulating
the various parameters required to authorize an
operation.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code>org.apache.hadoop.security.AccessControlException</code></dd>
</dl>
</li>
</ul>
<a name="checkPermission-org.apache.hadoop.hdfs.server.namenode.CachePool-org.apache.hadoop.fs.permission.FsAction-">
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</a>
<ul class="blockListLast">
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<h4>checkPermission</h4>
<pre>public&nbsp;void&nbsp;checkPermission(org.apache.hadoop.hdfs.server.namenode.CachePool&nbsp;pool,
org.apache.hadoop.fs.permission.FsAction&nbsp;access)
throws org.apache.hadoop.security.AccessControlException</pre>
<div class="block">Whether a cache pool can be accessed by the current context</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>pool</code> - CachePool being accessed</dd>
<dd><code>access</code> - type of action being performed on the cache pool</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code>org.apache.hadoop.security.AccessControlException</code> - if pool cannot be accessed</dd>
</dl>
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