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+<html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>Chapter 20. Stackable VFS modules</title><link rel="stylesheet" href="samba.css" type="text/css"><meta name="generator" content="DocBook XSL Stylesheets V1.60.1"><link rel="home" href="index.html" title="SAMBA Project Documentation"><link rel="up" href="optional.html" title="Part III. Advanced Configuration"><link rel="previous" href="CUPS-printing.html" title="Chapter 19. CUPS Printing Support in Samba 3.0"><link rel="next" href="winbind.html" title="Chapter 21. Integrated Logon Support using Winbind"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Chapter 20. Stackable VFS modules</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="CUPS-printing.html">Prev</a> </td><th width="60%" align="center">Part III. Advanced Configuration</th><td width="20%" align="right"> <a accesskey="n" href="winbind.html">Next</a></td></tr></table><hr></div><div class="chapter" lang="en"><div class="titlepage"><div><div><h2 class="title"><a name="VFS"></a>Chapter 20. Stackable VFS modules</h2></div><div><div class="author"><h3 class="author"><span class="firstname">Jelmer</span> <span class="othername">R.</span> <span class="surname">Vernooij</span></h3><div class="affiliation"><span class="orgname">The Samba Team<br></span><div class="address"><p><tt class="email">&lt;<a href="mailto:jelmer@samba.org">jelmer@samba.org</a>&gt;</tt></p></div></div></div></div><div><div class="author"><h3 class="author"><span class="firstname">John</span> <span class="othername">H.</span> <span class="surname">Terpstra</span></h3><div class="affiliation"><span class="orgname">Samba Team<br></span><div class="address"><p><tt class="email">&lt;<a href="mailto:jht@samba.org">jht@samba.org</a>&gt;</tt></p></div></div></div></div><div><div class="author"><h3 class="author"><span class="firstname">Alexander</span> <span class="surname">Bokovoy</span></h3></div></div><div><div class="author"><h3 class="author"><span class="firstname">Tim</span> <span class="surname">Potter</span></h3></div></div><div><div class="author"><h3 class="author"><span class="firstname">Simo</span> <span class="surname">Sorce</span></h3></div></div></div><div></div></div><div class="toc"><p><b>Table of Contents</b></p><dl><dt><a href="VFS.html#id2975746">Features and Benefits</a></dt><dt><a href="VFS.html#id2975763">Discussion</a></dt><dt><a href="VFS.html#id2975814">Included modules</a></dt><dd><dl><dt><a href="VFS.html#id2974410">audit</a></dt><dt><a href="VFS.html#id2974449">extd_audit</a></dt><dt><a href="VFS.html#id2974571">fake_perms</a></dt><dt><a href="VFS.html#id2974591">recycle</a></dt><dt><a href="VFS.html#id2974730">netatalk</a></dt></dl></dd><dt><a href="VFS.html#id2974775">VFS modules available elsewhere</a></dt><dd><dl><dt><a href="VFS.html#id2974797">DatabaseFS</a></dt><dt><a href="VFS.html#id2974851">vscan</a></dt></dl></dd><dt><a href="VFS.html#id2974880">Common Errors</a></dt></dl></div><div class="sect1" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="id2975746"></a>Features and Benefits</h2></div></div><div></div></div><p>
+Since Samba-3, there is support for stackable VFS(Virtual File System) modules.
+Samba passes each request to access the unix file system thru the loaded VFS modules.
+This chapter covers all the modules that come with the samba source and references to
+some external modules.
+</p></div><div xmlns:ns69="" class="sect1" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="id2975763"></a>Discussion</h2></div></div><div></div></div><p>
+If not supplied with your platform distribution binary Samba package you may have problems
+to compile these modules, as shared libraries are compiled and linked in different ways
+on different systems. They currently have been tested against GNU/Linux and IRIX.
+</p><ns69:p>
+To use the VFS modules, create a share similar to the one below. The
+important parameter is the <i class="parameter"><tt>vfs object</tt></i> parameter which must point to
+the exact pathname of the shared library objects. For example, to log all access
+to files and use a recycle bin:
+
+</ns69:p><pre class="programlisting">
+[audit]
+ comment = Audited /data directory
+ path = /data
+ vfs object = /path/to/audit.so /path/to/recycle.so
+ writeable = yes
+ browseable = yes
+</pre><ns69:p>
+</ns69:p><p>
+The modules are used in the order they are specified.
+</p><p>
+Further documentation on writing VFS modules for Samba can be found in
+the Samba Developers Guide.
+</p></div><div class="sect1" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="id2975814"></a>Included modules</h2></div></div><div></div></div><div xmlns:ns70="" class="sect2" lang="en"><div class="titlepage"><div><div><h3 class="title"><a name="id2974410"></a>audit</h3></div></div><div></div></div><ns70:p>
+ A simple module to audit file access to the syslog
+ facility. The following operations are logged:
+ </ns70:p><table class="simplelist" border="0" summary="Simple list"><tr><td>share</td></tr><tr><td>connect/disconnect</td></tr><tr><td>directory opens/create/remove</td></tr><tr><td>file open/close/rename/unlink/chmod</td></tr></table><ns70:p>
+ </ns70:p></div><div class="sect2" lang="en"><div class="titlepage"><div><div><h3 class="title"><a name="id2974449"></a>extd_audit</h3></div></div><div></div></div><p>
+ This module is identical with the <span class="emphasis"><em>audit</em></span> module above except
+ that it sends audit logs to both syslog as well as the smbd log file/s. The
+ loglevel for this module is set in the smb.conf file.
+ </p><p>
+ The logging information that will be written to the smbd log file is controlled by
+ the <i class="parameter"><tt>log level</tt></i> parameter in <tt class="filename">smb.conf</tt>. The
+ following information will be recorded:
+ </p><div class="table"><a name="id2974488"></a><p class="title"><b>Table 20.1. Extended Auditing Log Information</b></p><table summary="Extended Auditing Log Information" border="1"><colgroup><col><col></colgroup><thead><tr><th align="center">Log Level</th><th align="center">Log Details - File and Directory Operations</th></tr></thead><tbody><tr><td align="center">0</td><td align="left">Creation / Deletion</td></tr><tr><td align="center">1</td><td align="left">Create / Delete / Rename / Permission Changes</td></tr><tr><td align="center">2</td><td align="left">Create / Delete / Rename / Perm Change / Open / Close</td></tr></tbody></table></div></div><div class="sect2" lang="en"><div class="titlepage"><div><div><h3 class="title"><a name="id2974571"></a>fake_perms</h3></div></div><div></div></div><p>
+ This module was created to allow Roaming Profile files and directories to be set (on the Samba server
+ under Unix) as read only. This module will if installed on the Profiles share will report to the client
+ that the Profile files and directories are writable. This satisfies the client even though the files
+ will never be overwritten as the client logs out or shuts down.
+ </p></div><div xmlns:ns71="" class="sect2" lang="en"><div class="titlepage"><div><div><h3 class="title"><a name="id2974591"></a>recycle</h3></div></div><div></div></div><p>
+ A recycle-bin like module. When used any unlink call
+ will be intercepted and files moved to the recycle
+ directory instead of being deleted.
+ </p><ns71:p>Supported options:
+ </ns71:p><div class="variablelist"><dl><dt><span class="term">vfs_recycle_bin:repository</span></dt><dd><p>FIXME</p></dd><dt><span class="term">vfs_recycle_bin:keeptree</span></dt><dd><p>FIXME</p></dd><dt><span class="term">vfs_recycle_bin:versions</span></dt><dd><p>FIXME</p></dd><dt><span class="term">vfs_recycle_bin:touch</span></dt><dd><p>FIXME</p></dd><dt><span class="term">vfs_recycle_bin:maxsize</span></dt><dd><p>FIXME</p></dd><dt><span class="term">vfs_recycle_bin:exclude</span></dt><dd><p>FIXME</p></dd><dt><span class="term">vfs_recycle_bin:exclude_dir</span></dt><dd><p>FIXME</p></dd><dt><span class="term">vfs_recycle_bin:noversions</span></dt><dd><p>FIXME</p></dd></dl></div><ns71:p>
+ </ns71:p></div><div xmlns:ns72="" class="sect2" lang="en"><div class="titlepage"><div><div><h3 class="title"><a name="id2974730"></a>netatalk</h3></div></div><div></div></div><p>
+ A netatalk module, that will ease co-existence of samba and
+ netatalk file sharing services.
+ </p><ns72:p>Advantages compared to the old netatalk module:
+ </ns72:p><table class="simplelist" border="0" summary="Simple list"><tr><td>it doesn't care about creating of .AppleDouble forks, just keeps them in sync</td></tr><tr><td>if a share in <tt class="filename">smb.conf</tt> doesn't contain .AppleDouble item in hide or veto list, it will be added automatically</td></tr></table><ns72:p>
+ </ns72:p></div></div><div class="sect1" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="id2974775"></a>VFS modules available elsewhere</h2></div></div><div></div></div><p>
+This section contains a listing of various other VFS modules that
+have been posted but don't currently reside in the Samba CVS
+tree for one reason or another (e.g. it is easy for the maintainer
+to have his or her own CVS tree).
+</p><p>
+No statements about the stability or functionality of any module
+should be implied due to its presence here.
+</p><div class="sect2" lang="en"><div class="titlepage"><div><div><h3 class="title"><a name="id2974797"></a>DatabaseFS</h3></div></div><div></div></div><p>
+ URL: <a href="http://www.css.tayloru.edu/~elorimer/databasefs/index.php" target="_top">http://www.css.tayloru.edu/~elorimer/databasefs/index.php</a>
+ </p><p>By <a href="mailto:elorimer@css.tayloru.edu" target="_top">Eric Lorimer</a>.</p><p>
+ I have created a VFS module which implements a fairly complete read-only
+ filesystem. It presents information from a database as a filesystem in
+ a modular and generic way to allow different databases to be used
+ (originally designed for organizing MP3s under directories such as
+ &quot;Artists,&quot; &quot;Song Keywords,&quot; etc... I have since applied it to a student
+ roster database very easily). The directory structure is stored in the
+ database itself and the module makes no assumptions about the database
+ structure beyond the table it requires to run.
+ </p><p>
+ Any feedback would be appreciated: comments, suggestions, patches,
+ etc... If nothing else, hopefully it might prove useful for someone
+ else who wishes to create a virtual filesystem.
+ </p></div><div class="sect2" lang="en"><div class="titlepage"><div><div><h3 class="title"><a name="id2974851"></a>vscan</h3></div></div><div></div></div><p>URL: <a href="http://www.openantivirus.org/" target="_top">http://www.openantivirus.org/</a></p><p>
+ samba-vscan is a proof-of-concept module for Samba, which
+ uses the VFS (virtual file system) features of Samba 2.2.x/3.0
+ alphaX. Of couse, Samba has to be compiled with VFS support.
+ samba-vscan supports various virus scanners and is maintained
+ by Rainer Link.
+ </p></div></div><div class="sect1" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="id2974880"></a>Common Errors</h2></div></div><div></div></div><p>
+There must be some gotchas we should record here! Jelmer???
+</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="CUPS-printing.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="optional.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="winbind.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Chapter 19. CUPS Printing Support in Samba 3.0 </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> Chapter 21. Integrated Logon Support using Winbind</td></tr></table></div></body></html>