1 <?xml version="1.0" encoding="iso-8859-1"?>
2 <!DOCTYPE refentry PUBLIC "-//Samba-Team//DTD DocBook V4.2-Based Variant V1.0//EN" "http://www.samba.org/samba/DTD/samba-doc">
3 <ns:Root xmlns:xi="http://www.w3.org/2003/XInclude"
4 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
5 xmlns:ns="urn:TestNamespace">
6 <refentry id="vfs_nfs4acl_xattr.8">
9 <refentrytitle>vfs_nfs4acl_xattr</refentrytitle>
10 <manvolnum>8</manvolnum>
11 <refmiscinfo class="source">Samba</refmiscinfo>
12 <refmiscinfo class="manual">System Administration tools</refmiscinfo>
13 <refmiscinfo class="version">&doc.version;</refmiscinfo>
18 <refname>vfs_nfs4acl_xattr</refname>
19 <refpurpose>Save NTFS-ACLs as NFS4 encoded blobs in extended
20 attributes</refpurpose>
25 <command>vfs objects = nfs4acl_xattr</command>
30 <title>DESCRIPTION</title>
32 <para>This VFS module is part of the
33 <citerefentry><refentrytitle>samba</refentrytitle>
34 <manvolnum>7</manvolnum></citerefentry> suite.</para>
36 <para>The <command>vfs_acl_xattr</command> VFS module stores NTFS Access
37 Control Lists (ACLs) in Extended Attributes (EAs/xattrs). This enables the
38 full mapping of Windows ACLs on Samba servers.
41 <para>This module is stackable.</para>
46 <title>OPTIONS</title>
48 <xi:include href="nfs4.xml.include" xpointer="xpointer(*/*)" />
53 <term>nfs4acl_xattr:encoding = [nfs|ndr|xdr]</term>
55 <para>This parameter configures the marshaling format used in the ACL
56 blob and the default extended attribute name used to store the blob.
59 <para>When set to <emphasis>nfs</emphasis> - fetch and store the NT
60 ACL in NFS 4.0 or 4.1 compatible XDR encoding. By default this uses
61 the extended attribute "system.nfs4_acl". This setting also
62 disables <emphasis>validate_mode</emphasis>.</para>
64 <para>When set to <emphasis>ndr (default)</emphasis> - store the NT
65 ACL with POSIX draft NFSv4 compatible NDR encoding. By default this
66 uses the extended attribute "security.nfs4acl_ndr".</para>
68 <para>When set to <emphasis>xdr</emphasis> - store the NT ACL in a
69 format similar to NFS 4.1 RFC 5661 in XDR encoding. The main
70 differences to RFC 5661 are the use of ids instead of strings as users
71 and group identifiers and an additional attribute per nfsace4. By
72 default this encoding stores the blob in the extended attribute
73 "security.nfs4acl_xdr".</para>
78 <term>nfs4acl_xattr:version = [40|41]</term>
80 <para>This parameter configures the NFS4 ACL level. Only
81 <emphasis>41</emphasis> fully supports mapping NT ACLs and should be
82 used. The default is <emphasis>41</emphasis>.</para>
87 <term>nfs4acl_xattr:default acl style = [posix|windows|everyone]</term>
89 <para>This parameter determines the type of ACL that is synthesized in
90 case a file or directory lacks an ACL extended attribute.</para>
92 <para>When set to <emphasis>posix</emphasis>, an ACL will be
93 synthesized based on the POSIX mode permissions for user, group and
94 others, with an additional ACE for <emphasis>NT
95 Authority\SYSTEM</emphasis> will full rights.</para>
97 <para>When set to <emphasis>windows</emphasis>, an ACL is synthesized
98 the same way Windows does it, only including permissions for the owner
99 and <emphasis>NT Authority\SYSTEM</emphasis>.</para>
101 <para>When set to <emphasis>everyone</emphasis>, an ACL is synthesized
102 giving full permissions to everyone (S-1-1-0).</para>
104 <para>The default for this option is
105 <emphasis>everyone</emphasis>.</para>
110 <term>nfs4acl_xattr:xattr_name = STRING</term>
112 <para>This parameter configures the extended attribute name used to
113 store the marshaled ACL.</para>
114 <para>The default depends on the setting for
115 <emphasis>nfs4acl_xattr:encoding</emphasis>.</para>
120 <term>nfs4acl_xattr:nfs4_id_numeric = yes|no (default: no)</term>
122 <para>This parameter tells the module how the NFS4 server encodes user
123 and group identifiers on the network. With the default setting the
124 module expects identifiers encoded as per the NFS4 RFC as
126 <para>When set to <emphasis>yes</emphasis>, the module expects the
127 identifiers as numeric string.</para>
128 <para>The default for this options<emphasis>no</emphasis>.</para>
133 <term>nfs4acl_xattr:validate_mode = yes|no</term>
135 <para>This parameter configures whether the module enforces the POSIX
136 mode is set to 0777 for directories and 0666 for files. If this
137 constrained is not met, the xattr with the ACL blob is
139 <para>The default depends on the setting for
140 <emphasis>nfs4acl_xattr:encoding</emphasis>: when set to
141 <emphasis>nfs</emphasis> this setting is disabled by default,
142 otherwise it is enabled.</para>
150 <title>EXAMPLES</title>
152 <para>A directory can be exported via Samba using this module as
156 <smbconfsection name="[samba_gpfs_share]"/>
157 <smbconfoption name="vfs objects">nfs4acl_xattr</smbconfoption>
158 <smbconfoption name="path">/foo/bar</smbconfoption>
163 <title>AUTHOR</title>
165 <para>The original Samba software and related utilities
166 were created by Andrew Tridgell. Samba is now developed
167 by the Samba Team as an Open Source project similar
168 to the way the Linux kernel is developed.</para>