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<html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>vfs_fileid</title><link rel="stylesheet" href="../samba.css" type="text/css"><meta name="generator" content="DocBook XSL Stylesheets V1.75.2"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="refentry" title="vfs_fileid"><a name="vfs_fileid.8"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>vfs_fileid — Generates file_id structs with unique device id values for
cluster setups</p></div><div class="refsynopsisdiv" title="Synopsis"><h2>Synopsis</h2><div class="cmdsynopsis"><p><code class="literal">vfs objects = fileid</code></p></div></div><div class="refsect1" title="DESCRIPTION"><a name="id2528904"></a><h2>DESCRIPTION</h2><p>This VFS module is part of the
<a class="citerefentry" href="samba.7.html"><span class="citerefentry"><span class="refentrytitle">samba</span>(7)</span></a>
suite.</p><p>Samba uses file_id structs to uniquely identify files
for locking purpose. By default the file_id contains the device
and inode number returned by the <code class="literal">stat()</code> system call.
As the file_id is a unique identifier of a file, it must be the same
on all nodes in a cluster setup. This module overloads the
<code class="literal">SMB_VFS_FILE_ID_CREATE()</code> operation and
generates the device number based on the configured algorithm
(see the "fileid:algorithm" option).
</p></div><div class="refsect1" title="OPTIONS"><a name="id2489304"></a><h2>OPTIONS</h2><div class="variablelist"><dl><dt><span class="term">fileid:algorithm = ALGORITHM</span></dt><dd><p>Available algorithms are <code class="literal">fsname</code>
and <code class="literal">fsid</code>. The default value is
<code class="literal">fsname</code>.
</p><p>The <code class="literal">fsname</code> algorithm generates
device id by hashing the kernel device name.
</p><p>The <code class="literal">fsid</code> algorithm generates
the device id from the <code class="literal">f_fsid</code> returned
from the <code class="literal">statfs()</code> syscall.
</p></dd><dt><span class="term">fileid:mapping = ALGORITHM</span></dt><dd><p>This option is the legacy version of the
<code class="literal">fileid:algorithm</code> option, which was used in earlier
versions of fileid mapping feature in custom Samba 3.0 versions.
</p></dd></dl></div></div><div class="refsect1" title="EXAMPLES"><a name="id2489529"></a><h2>EXAMPLES</h2><p>Usage of the <code class="literal">fileid</code> module with the
<code class="literal">fsid</code> algorithm:</p><pre class="programlisting">
<em class="parameter"><code>[global]</code></em>
<a class="link" href="smb.conf.5.html#VFSOBJECTS" target="_top">vfs objects = fileid</a>
<a class="link" href="smb.conf.5.html#FILEID:ALGORITHM" target="_top">fileid:algorithm = fsid</a>
</pre></div><div class="refsect1" title="VERSION"><a name="id2489685"></a><h2>VERSION</h2><p>This man page is correct for version 3.2 of the Samba suite.
</p></div><div class="refsect1" title="AUTHOR"><a name="id2489696"></a><h2>AUTHOR</h2><p>The original Samba software and related utilities
were created by Andrew Tridgell. Samba is now developed
by the Samba Team as an Open Source project similar
to the way the Linux kernel is developed.</p></div></div></body></html>
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