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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_zfsacl.8">
+
+<refmeta>
+ <refentrytitle>vfs_zfsacl</refentrytitle>
+ <manvolnum>8</manvolnum>
+ <refmiscinfo class="source">Samba</refmiscinfo>
+ <refmiscinfo class="manual">System Administration tools</refmiscinfo>
+ <refmiscinfo class="version">4.0</refmiscinfo>
+</refmeta>
+
+
+<refnamediv>
+ <refname>vfs_zfsacl</refname>
+ <refpurpose>ZFS ACL samba module</refpurpose>
+</refnamediv>
+
+<refsynopsisdiv>
+ <cmdsynopsis>
+ <command>vfs objects = zfsacl</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>zfsacl</command> VFS module is the home
+ for all ACL extensions that Samba requires for proper integration
+ with ZFS.
+ </para>
+
+ <para>Currently the zfsacl vfs module provides extensions in following areas :
+ <itemizedlist>
+ <listitem><para>NFSv4 ACL Interfaces with configurable options for ZFS</para></listitem>
+ </itemizedlist>
+ </para>
+
+ <para><command>NOTE:</command>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.
+ </para>
+
+ <para>This module makes use of the smb.conf parameter
+ <smbconfoption name="acl map full control">acl map full control</smbconfoption>
+ When set to yes (the default), this parameter will add in the FILE_DELETE_CHILD
+ bit on a returned ACE entry for a file (not a directory) that already
+ contains all file permissions except for FILE_DELETE and FILE_DELETE_CHILD.
+ This can prevent Windows applications that request GENERIC_ALL access
+ from getting ACCESS_DENIED errors when running against a filesystem
+ with NFSv4 compatible ACLs.
+ </para>
+
+ <para>This module is stackable.</para>
+
+ <para>Since Samba 4.0 all options are per share options.</para>
+
+</refsect1>
+
+
+<refsect1>
+ <title>OPTIONS</title>
+
+ <variablelist>
+
+ <varlistentry>
+
+ <term>nfs4:mode = [ simple | special ]</term>
+ <listitem>
+ <para>
+ Controls substitution of special IDs (OWNER@ and GROUP@) on ZFS.
+ The use of mode simple is recommended.
+ In this mode only non inheriting ACL entries for the file owner
+ and group are mapped to special IDs.
+ </para>
+
+ <para>The following MODEs are understood by the module:</para>
+ <itemizedlist>
+ <listitem><para><command>simple(default)</command> - use OWNER@ and GROUP@ special IDs for non inheriting ACEs only.</para></listitem>
+ <listitem><para><command>special(deprecated)</command> - use OWNER@ and GROUP@ special IDs in ACEs for all file owner and group ACEs.</para></listitem>
+ </itemizedlist>
+ </listitem>
+
+ </varlistentry>
+
+
+ <varlistentry>
+ <term>nfs4:acedup = [dontcare|reject|ignore|merge]</term>
+ <listitem>
+ <para>
+ This parameter configures how Samba handles duplicate ACEs encountered in ZFS ACLs.
+ ZFS allows/creates duplicate ACE for different bits for same ID.
+ </para>
+
+ <para>Following is the behaviour of Samba for different values :</para>
+ <itemizedlist>
+ <listitem><para><command>dontcare (default)</command> - copy the ACEs as they come</para></listitem>
+ <listitem><para><command>reject</command> - stop operation and exit with error on ACL set op</para></listitem>
+ <listitem><para><command>ignore</command> - don't include the second matching ACE</para></listitem>
+ <listitem><para><command>merge</command> - bitwise OR the 2 ace.flag fields and 2 ace.mask fields of the 2 duplicate ACEs into 1 ACE</para></listitem>
+ </itemizedlist>
+ </listitem>
+ </varlistentry>
+
+
+ <varlistentry>
+ <term>nfs4:chown = [yes|no]</term>
+ <listitem>
+ <para>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.</para>
+ <para>Some filesystems allow chown as a) giving b) stealing. It is the latter
+ that is considered a risk.</para>
+
+ <para>Following is the behaviour of Samba for different values : </para>
+ <itemizedlist>
+ <listitem><para><command>yes</command> - Enable chown if as supported by the under filesystem</para></listitem>
+ <listitem><para><command>no (default)</command> - Disable chown</para></listitem>
+ </itemizedlist>
+ </listitem>
+ </varlistentry>
+
+ </variablelist>
+</refsect1>
+
+<refsect1>
+ <title>EXAMPLES</title>
+
+ <para>A ZFS mount can be exported via Samba as follows :</para>
+
+<programlisting>
+ <smbconfsection name="[samba_zfs_share]"/>
+ <smbconfoption name="vfs objects">zfsacl</smbconfoption>
+ <smbconfoption name="path">/test/zfs_mount</smbconfoption>
+ <smbconfoption name="nfs4: mode">special</smbconfoption>
+ <smbconfoption name="nfs4: acedup">merge</smbconfoption>
+</programlisting>
+</refsect1>
+
+<refsect1>
+ <title>VERSION</title>
+ <para>This man page is correct for version 4.0.x of the Samba suite.
+ </para>
+</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>