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Signed-off-by: Karolin Seeger <kseeger@samba.org> Reviewed-by: Andrew Bartlett <abartlet@samba.org> Autobuild-User(master): Andrew Bartlett <abartlet@samba.org> Autobuild-Date(master): Thu Jul 11 02:53:34 CEST 2013 on sn-devel-104
113 lines
3.0 KiB
XML
113 lines
3.0 KiB
XML
<?xml version="1.0" encoding="iso-8859-1"?>
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<!DOCTYPE refentry PUBLIC "-//Samba-Team//DTD DocBook V4.2-Based Variant V1.0//EN" "http://www.samba.org/samba/DTD/samba-doc">
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<refentry id="vfs_fileid.8">
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<refmeta>
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<refentrytitle>vfs_fileid</refentrytitle>
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<manvolnum>8</manvolnum>
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<refmiscinfo class="source">Samba</refmiscinfo>
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<refmiscinfo class="manual">System Administration tools</refmiscinfo>
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<refmiscinfo class="version">4.1</refmiscinfo>
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</refmeta>
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<refnamediv>
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<refname>vfs_fileid</refname>
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<refpurpose>Generates file_id structs with unique device id values for
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cluster setups</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<cmdsynopsis>
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<command>vfs objects = fileid</command>
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</cmdsynopsis>
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</refsynopsisdiv>
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<refsect1>
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<title>DESCRIPTION</title>
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<para>This VFS module is part of the
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<citerefentry><refentrytitle>samba</refentrytitle>
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<manvolnum>7</manvolnum></citerefentry>
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suite.</para>
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<para>Samba uses file_id structs to uniquely identify files
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for locking purpose. By default the file_id contains the device
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and inode number returned by the <command>stat()</command> system call.
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As the file_id is a unique identifier of a file, it must be the same
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on all nodes in a cluster setup. This module overloads the
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<command>SMB_VFS_FILE_ID_CREATE()</command> operation and
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generates the device number based on the configured algorithm
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(see the "fileid:algorithm" option).
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</para>
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</refsect1>
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<refsect1>
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<title>OPTIONS</title>
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<variablelist>
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<varlistentry>
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<term>fileid:algorithm = ALGORITHM</term>
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<listitem>
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<para>Available algorithms are <command>fsname</command>
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and <command>fsid</command>. The default value is
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<command>fsname</command>.
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</para>
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<para>The <command>fsname</command> algorithm generates
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device id by hashing the kernel device name.
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</para>
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<para>The <command>fsid</command> algorithm generates
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the device id from the <command>f_fsid</command> returned
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from the <command>statfs()</command> syscall.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>fileid:mapping = ALGORITHM</term>
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<listitem>
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<para>This option is the legacy version of the
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<command>fileid:algorithm</command> option, which was used in earlier
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versions of fileid mapping feature in custom Samba 3.0 versions.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1>
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<title>EXAMPLES</title>
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<para>Usage of the <command>fileid</command> module with the
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<command>fsid</command> algorithm:</para>
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<programlisting>
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<smbconfsection name="[global]"/>
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<smbconfoption name="vfs objects">fileid</smbconfoption>
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<smbconfoption name="fileid:algorithm">fsid</smbconfoption>
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</programlisting>
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</refsect1>
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<refsect1>
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<title>VERSION</title>
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<para>This man page is correct for version 3.2 of the Samba suite.
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</para>
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</refsect1>
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<refsect1>
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<title>AUTHOR</title>
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<para>The original Samba software and related utilities
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were created by Andrew Tridgell. Samba is now developed
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by the Samba Team as an Open Source project similar
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to the way the Linux kernel is developed.</para>
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</refsect1>
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</refentry>
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