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<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE refentry PUBLIC "-//Samba-Team//DTD DocBook V4.2-Based Variant V1.0//EN" "http://www.samba.org/samba/DTD/samba-doc">
<refentry id="vfs_nfs4acl_xattr.8">
<refmeta>
<refentrytitle>vfs_nfs4acl_xattr</refentrytitle>
<manvolnum>8</manvolnum>
<refmiscinfo class="source">Samba</refmiscinfo>
<refmiscinfo class="manual">System Administration tools</refmiscinfo>
<refmiscinfo class="version">&doc.version;</refmiscinfo>
</refmeta>
<refnamediv>
<refname>vfs_nfs4acl_xattr</refname>
<refpurpose>Save NTFS-ACLs as NFS4 encoded blobs in extended
attributes</refpurpose>
</refnamediv>
<refsynopsisdiv>
<cmdsynopsis>
<command>vfs objects = nfs4acl_xattr</command>
</cmdsynopsis>
</refsynopsisdiv>
<refsect1>
<title>DESCRIPTION</title>
<para>This VFS module is part of the
<citerefentry><refentrytitle>samba</refentrytitle>
<manvolnum>7</manvolnum></citerefentry> suite.</para>
<para>The <command>vfs_acl_xattr</command> VFS module stores NTFS Access
Control Lists (ACLs) in Extended Attributes (EAs/xattrs). This enables the
full mapping of Windows ACLs on Samba servers.
</para>
<para>This module is stackable.</para>
</refsect1>
<refsect1>
<title>OPTIONS</title>
<variablelist>
<varlistentry>
<term>nfs4acl_xattr:encoding = [ndr|xdr]</term>
<listitem>
<para>This parameter configures the marshaling format used in the ACL
blob and the default extended attribute name used to store the blob.
</para>
<para>When set to <emphasis>ndr (default)</emphasis> - store the NT
ACL with POSIX draft NFSv4 compatible NDR encoding. By default this
uses the extended attribute "security.nfs4acl_ndr".</para>
<para>When set to <emphasis>xdr</emphasis> - store the NT ACL in a
format similar to NFS 4.1 RFC 5661 in XDR encoding. The main
differences to RFC 5661 are the use of ids instead of strings as users
and group identifiers and an additional attribute per nfsace4. By
default this encoding stores the blob in the extended attribute
"security.nfs4acl_xdr".</para>
</listitem>
</varlistentry>
<varlistentry>
<term>nfs4acl_xattr:version = [40|41]</term>
<listitem>
<para>This parameter configures the NFS4 ACL level. Only
<emphasis>41</emphasis> fully supports mapping NT ACLs and should be
used. The default is <emphasis>41</emphasis>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>nfs4acl_xattr:default acl style = [posix|windows|everyone]</term>
<listitem>
<para>This parameter determines the type of ACL that is synthesized in
case a file or directory lacks an ACL extended attribute.</para>
<para>When set to <emphasis>posix</emphasis>, an ACL will be
synthesized based on the POSIX mode permissions for user, group and
others, with an additional ACE for <emphasis>NT
Authority\SYSTEM</emphasis> will full rights.</para>
<para>When set to <emphasis>windows</emphasis>, an ACL is synthesized
the same way Windows does it, only including permissions for the owner
and <emphasis>NT Authority\SYSTEM</emphasis>.</para>
<para>When set to <emphasis>everyone</emphasis>, an ACL is synthesized
giving full permissions to everyone (S-1-1-0).</para>
<para>The default for this option is
<emphasis>everyone</emphasis>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>nfs4acl_xattr:xattr_name = STRING</term>
<listitem>
<para>This parameter configures the extended attribute name used to
store the marshaled ACL.</para>
<para>The default depends on the setting for
<emphasis>nfs4acl_xattr:encoding</emphasis>.</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>EXAMPLES</title>
<para>A directory can be exported via Samba using this module as
follows:</para>
<programlisting>
<smbconfsection name="[samba_gpfs_share]"/>
<smbconfoption name="vfs objects">nfs4acl_xattr</smbconfoption>
<smbconfoption name="path">/foo/bar</smbconfoption>
</programlisting>
</refsect1>
<refsect1>
<title>AUTHOR</title>
<para>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.</para>
</refsect1>
</refentry>
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