Imported Upstream version 4.0.0+dfsg1upstream/4.0.0+dfsg1

author: Ivo De Decker <ivo.dedecker@ugent.be> 2013-05-10 13:33:02 +0200
committer: Ivo De Decker <ivo.dedecker@ugent.be> 2013-05-10 13:33:02 +0200
commit: 31202ad025bcdeb2585d18dc3f4641b5cf9c0ec4 (patch)
tree: 32c20d66684ac97b86e55495146e9a676bfae85a /docs/htmldocs/manpages/vfs_gpfs.8.html
parent: 2865eba17fddda6c49f1209ca92d539111e7ff93 (diff)
download: samba-31202ad025bcdeb2585d18dc3f4641b5cf9c0ec4.tar.gz
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-<html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>vfs_gpfs</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_gpfs"><a name="vfs_gpfs.8"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>vfs_gpfs &#8212; gpfs specific samba extensions like acls and prealloc</p></div><div class="refsynopsisdiv" title="Synopsis"><h2>Synopsis</h2><div class="cmdsynopsis"><p><code class="literal">vfs objects = gpfs</code></p></div></div><div class="refsect1" title="DESCRIPTION"><a name="id266339"></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>The <code class="literal">gpfs</code> VFS module is the home
-	for all gpfs extensions that Samba requires for proper integration
-	with GPFS. It uses the GPL library interfaces provided by GPFS.
-	</p><p>Currently the gpfs vfs module provides extensions in following areas :
-	</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>NFSv4 ACL Interfaces with configurable options for GPFS</p></li><li class="listitem"><p>Kernel oplock support on GPFS</p></li><li class="listitem"><p>Lease support on GPFS</p></li></ul></div><p>
-	</p><p><code class="literal">NOTE:</code>This module follows the posix-acl behaviour
-	and hence allows permission stealing via chown. Samba might allow at a later
-	point in time, to restrict the chown via this module as such restrictions
-	are the responsibility of the underlying filesystem than of Samba.
-	</p><p>This module is stackable.</p></div><div class="refsect1" title="OPTIONS"><a name="id266858"></a><h2>OPTIONS</h2><div class="variablelist"><dl><dt><span class="term">gpfs:sharemodes = [ yes | no ]</span></dt><dd><p>
-		Enable/Disable cross node sharemode handling for GPFS.
-		</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>
-		<code class="literal">yes(default)</code> - propagate sharemodes across all GPFS nodes.
-		</p></li><li class="listitem"><p>
-		<code class="literal">no</code> - do not propagate sharemodes across all GPFS nodes.
-		This should only be used if the GPFS file system is
-		exclusively exported by Samba. Access by local unix application or
-		NFS exports could lead to corrupted files.
-		</p></li></ul></div></dd><dt><span class="term">gpfs:leases = [ yes | no ]</span></dt><dd><p>
-		Enable/Disable cross node leases (oplocks) for GPFS.
-		You should also set the <code class="literal">oplocks</code> and <code class="literal">kernel oplocks</code>
-		options to the same value.
-		</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>
-		<code class="literal">yes(default)</code> - propagate leases across all GPFS nodes.
-		</p></li><li class="listitem"><p>
-		<code class="literal">no</code> - do not propagate leases across all GPFS nodes.
-		This should only be used if the GPFS file system is
-		exclusively exported by Samba. Access by local unix application or
-		NFS exports could lead to corrupted files.
-		</p></li></ul></div></dd><dt><span class="term">gpfs:hsm = [ yes | no ]</span></dt><dd><p>
-		Enable/Disable announcing if this FS has HSM enabled.
-		</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>
-		<code class="literal">no(default)</code> - Do not announce HSM.
-		</p></li><li class="listitem"><p>
-		<code class="literal">no</code> - Announce HSM.
-		</p></li></ul></div></dd><dt><span class="term">gpfs:getrealfilename = [ yes | no ]</span></dt><dd><p>
-		Enable/Disable usage of the <code class="literal">gpfs_get_realfilename_path()</code> function.
-		This improves the casesensitive wildcard file name access.
-		</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>
-		<code class="literal">yes(default)</code> - use <code class="literal">gpfs_get_realfilename_path()</code>.
-		</p></li><li class="listitem"><p>
-		<code class="literal">no</code> - do not use <code class="literal">gpfs_get_realfilename_path()</code>.
-		It seems that <code class="literal">gpfs_get_realfilename_path()</code> doesn't work on AIX.
-		</p></li></ul></div></dd><dt><span class="term">gpfs:winattr = [ yes | no ]</span></dt><dd><p>
-		Enable/Disable usage of the windows attributes in GPFS.
-		GPFS is able to store windows file attributes e.g. HIDDEN,
-		READONLY, SYSTEM and others natively. That means Samba doesn't
-		need to map them to permission bits or extended attributes.
-		</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>
-		<code class="literal">no(default)</code> - do not use GPFS windows attributes.
-		</p></li><li class="listitem"><p>
-		<code class="literal">yes</code> - use GPFS windows attributes.
-		</p></li></ul></div></dd><dt><span class="term">gpfs:merge_writeappend = [ yes | no ]</span></dt><dd><p>
-		GPFS ACLs doesn't know about the 'APPEND' right.
-		This optionen lets Samba map the 'APPEND' right to 'WRITE'.
-		</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>
-		<code class="literal">yes(default)</code> - map 'APPEND' to 'WRITE'.
-		</p></li><li class="listitem"><p>
-		<code class="literal">no</code> - do not map 'APPEND' to 'WRITE'.
-		</p></li></ul></div></dd><dt><span class="term">gpfs:refuse_dacl_protected = [ yes | no ]</span></dt><dd><p>
-		As GPFS does not support the ACE4_FLAG_NO_PROPAGATE NFSv4 flag (which would be
-		the mapping for the DESC_DACL_PROTECTED flag), the status of this flag is
-		currently silently ignored by Samba. That means that if you deselect the "Allow
-		inheritable permissions..." checkbox in Windows' ACL dialog and then apply the
-		ACL, the flag will be back immediately.
-		</p><p>
-		To make sure that automatic migration with e.g. robocopy does not lead to
-		ACLs silently (and unintentionally) changed, you can set
-		<code class="literal">gpfs:refuse_dacl_protected = yes</code> to enable an explicit
-		check for this flag and if set, it will return NT_STATUS_NOT_SUPPORTED so
-		errors are shown up on the Windows side and the Administrator is aware of
-		the ACLs not being settable like intended
-		</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>
-		<code class="literal">no(default)</code> - ignore the DESC_DACL_PROTECTED flags.
-		</p></li><li class="listitem"><p>
-		<code class="literal">yes</code> - reject ACLs with DESC_DACL_PROTECTED.
-		</p></li></ul></div></dd><dt><span class="term">nfs4:mode = [ simple | special ]</span></dt><dd><p>
-		Enable/Disable substitution of special IDs on GPFS. This parameter
-		should not affect the windows users in anyway. It only ensures that Samba
-		sets the special IDs - OWNER@ and GROUP@ ( mappings to simple uids )
-		that are relevant to GPFS.
-		</p><p>The following MODEs are understood by the module:</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p><code class="literal">simple(default)</code> - do not use special IDs in GPFS ACEs</p></li><li class="listitem"><p><code class="literal">special</code> - use special IDs in GPFS ACEs. </p></li></ul></div></dd><dt><span class="term">nfs4:acedup = [dontcare|reject|ignore|merge]</span></dt><dd><p>
-		This parameter configures how Samba handles duplicate ACEs encountered in GPFS ACLs.
-		GPFS allows/creates duplicate ACE for different bits for same ID.
-		</p><p>Following is the behaviour of Samba for different values :</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p><code class="literal">dontcare (default)</code> - copy the ACEs as they come</p></li><li class="listitem"><p><code class="literal">reject</code> - stop operation and exit with error on ACL set op</p></li><li class="listitem"><p><code class="literal">ignore</code> - don't include the second matching ACE</p></li><li class="listitem"><p><code class="literal">merge</code> - bitwise OR the 2 ace.flag fields and 2 ace.mask fields of the 2 duplicate ACEs into 1 ACE</p></li></ul></div></dd><dt><span class="term">nfs4:chown = [yes|no]</span></dt><dd><p>This parameter allows enabling or disabling the chown supported
-		by the underlying filesystem. This parameter should be enabled with
-		care as it might leave your system insecure.</p><p>Some filesystems allow chown as a) giving b) stealing. It is the latter
-		that is considered a risk.</p><p>Following is the behaviour of Samba for different values : </p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p><code class="literal">yes</code> - Enable chown if as supported by the under filesystem</p></li><li class="listitem"><p><code class="literal">no (default)</code> - Disable chown</p></li></ul></div></dd><dt><span class="term">gpfs:syncio = [yes|no]</span></dt><dd><p>This parameter makes Samba open all files with O_SYNC.
-		  This triggers optimizations in GPFS for workloads that
-		  heavily share files.</p><p>Following is the behaviour of Samba for different
-		  values:
-		</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p><code class="literal">yes</code>Open files with O_SYNC
-		</p></li><li class="listitem"><p><code class="literal">no (default)</code>Open files as
-		    normal Samba would do
-		</p></li></ul></div></dd></dl></div></div><div class="refsect1" title="EXAMPLES"><a name="id307209"></a><h2>EXAMPLES</h2><p>A GPFS mount can be exported via Samba as follows :</p><pre class="programlisting">
-        <em class="parameter"><code>[samba_gpfs_share]</code></em>
-	<a class="link" href="smb.conf.5.html#VFSOBJECTS" target="_top">vfs objects = gpfs</a>
-	<a class="link" href="smb.conf.5.html#PATH" target="_top">path = /test/gpfs_mount</a>
-	<a class="link" href="smb.conf.5.html#NFS4:MODE" target="_top">nfs4: mode = special</a>
-	<a class="link" href="smb.conf.5.html#NFS4:ACEDUP" target="_top">nfs4: acedup = merge</a>
-</pre></div><div class="refsect1" title="CAVEATS"><a name="id307362"></a><h2>CAVEATS</h2><p>
-	Depending on the version of gpfs, the <code class="literal">libgpfs_gpl</code>
-	library or the <code class="literal">libgpfs</code> library is needed at
-	runtime by the <code class="literal">gpfs</code> VFS module:
-	Starting with gpfs 3.2.1 PTF8, the complete <code class="literal">libgpfs</code>
-	is available as open source and <code class="literal">libgpfs_gpl</code> does no
-	longer exist. With earlier versions of gpfs, only the
-	<code class="literal">libgpfs_gpl</code> library was open source and could be
-	used at run time.
-	</p><p>
-	At build time, only the header file <code class="literal">gpfs_gpl.h</code>
-	is required , which is a symlink to <code class="literal">gpfs.h</code> in
-	gpfs versions newer than 3.2.1 PTF8.
-	</p></div><div class="refsect1" title="VERSION"><a name="id307417"></a><h2>VERSION</h2><p>This man page is correct for version 3.0.25 of the Samba suite.
-	</p></div><div class="refsect1" title="AUTHOR"><a name="id307426"></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><p>The GPFS VFS module was created with contributions from
-	Volker Lendecke and the developers at IBM.
-	</p><p> This manpage was created by the IBM FSCC team </p></div></div></body></html>
author	Ivo De Decker <ivo.dedecker@ugent.be>	2013-05-10 13:33:02 +0200
committer	Ivo De Decker <ivo.dedecker@ugent.be>	2013-05-10 13:33:02 +0200
commit	31202ad025bcdeb2585d18dc3f4641b5cf9c0ec4 (patch)
tree	32c20d66684ac97b86e55495146e9a676bfae85a /docs/htmldocs/manpages/vfs_gpfs.8.html
parent	2865eba17fddda6c49f1209ca92d539111e7ff93 (diff)
download	samba-31202ad025bcdeb2585d18dc3f4641b5cf9c0ec4.tar.gz