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.\"
.\" CDDL HEADER START
.\"
.\" The contents of this file are subject to the terms of the
.\" Common Development and Distribution License (the "License").
.\" You may not use this file except in compliance with the License.
.\"
.\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
.\" or http://www.opensolaris.org/os/licensing.
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.\" information: Portions Copyright [yyyy] [name of copyright owner]
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.\"
.\" Copyright (c) 2009 Sun Microsystems, Inc. All Rights Reserved.
.\" Copyright 2011 Joshua M. Clulow <josh@sysmgr.org>
.\" Copyright (c) 2011, 2019 by Delphix. All rights reserved.
.\" Copyright (c) 2011, Pawel Jakub Dawidek <pjd@FreeBSD.org>
.\" Copyright (c) 2012, Glen Barber <gjb@FreeBSD.org>
.\" Copyright (c) 2012, Bryan Drewery <bdrewery@FreeBSD.org>
.\" Copyright (c) 2013, Steven Hartland <smh@FreeBSD.org>
.\" Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
.\" Copyright (c) 2014, Joyent, Inc. All rights reserved.
.\" Copyright (c) 2014 by Adam Stevko. All rights reserved.
.\" Copyright (c) 2014 Integros [integros.com]
.\" Copyright (c) 2014, Xin LI <delphij@FreeBSD.org>
.\" Copyright (c) 2014-2015, The FreeBSD Foundation, All Rights Reserved.
.\" Copyright (c) 2016 Nexenta Systems, Inc. All Rights Reserved.
.\" Copyright 2019 Richard Laager. All rights reserved.
.\" Copyright 2018 Nexenta Systems, Inc.
.\" Copyright 2019 Joyent, Inc.
.\"
.Dd May 27, 2021
.Dt ZFS-JAIL 8
.Os
.
.Sh NAME
.Nm zfs-jail
.Nd attach or detach ZFS filesystem from FreeBSD jail
.Sh SYNOPSIS
.Nm zfs Cm jail
.Ar jailid Ns | Ns Ar jailname
.Ar filesystem
.Nm zfs Cm unjail
.Ar jailid Ns | Ns Ar jailname
.Ar filesystem
.
.Sh DESCRIPTION
.Bl -tag -width ""
.It Xo
.Nm zfs
.Cm jail
.Ar jailid Ns | Ns Ar jailname
.Ar filesystem
.Xc
Attach the specified
.Ar filesystem
to the jail identified by JID
.Ar jailid
or name
.Ar jailname .
From now on this file system tree can be managed from within a jail if the
.Sy jailed
property has been set.
To use this functionality, the jail needs the
.Sy allow.mount
and
.Sy allow.mount.zfs
parameters set to
.Sy 1
and the
.Sy enforce_statfs
parameter set to a value lower than
.Sy 2 .
.Pp
You cannot attach a jailed dataset's children to another jail.
You can also not attach the root file system
of the jail or any dataset which needs to be mounted before the zfs rc script
is run inside the jail, as it would be attached unmounted until it is
mounted from the rc script inside the jail.
.Pp
To allow management of the dataset from within a jail, the
.Sy jailed
property has to be set and the jail needs access to the
.Pa /dev/zfs
device.
The
.Sy quota
property cannot be changed from within a jail.
.Pp
After a dataset is attached to a jail and the
.Sy jailed
property is set, a jailed file system cannot be mounted outside the jail,
since the jail administrator might have set the mount point to an unacceptable value.
.Pp
See
.Xr jail 8
for more information on managing jails.
Jails are a
.Fx
feature and are not relevant on other platforms.
.It Xo
.Nm zfs
.Cm unjail
.Ar jailid Ns | Ns Ar jailname
.Ar filesystem
.Xc
Detaches the specified
.Ar filesystem
from the jail identified by JID
.Ar jailid
or name
.Ar jailname .
.El
.Sh SEE ALSO
.Xr zfsprops 7 ,
.Xr jail 8
|
