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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
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.\" fields enclosed by brackets "[]" replaced with your own identifying
.\" 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 December 9, 2019
.Dt ZFS-JAIL 8
.Os FreeBSD
.Sh NAME
.Nm zfs Ns Pf - Cm jail
.Nd Attaches and detaches ZFS filesystems from FreeBSD jails.
.No A Tn ZFS
dataset can be attached to a jail by using the
.Qq Nm Cm jail
subcommand. You cannot attach a dataset to one jail and the children of the
same dataset 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. 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. See
.Xr jail 8
for information on how to allow mounting
.Tn ZFS
datasets from within a jail.
.Pp
.No A Tn ZFS
dataset can be detached from a jail using the
.Qq Nm Cm unjail
subcommand.
.Pp
After a dataset is attached to a jail and the 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.
.Sh SYNOPSIS
.Nm
.Cm jail
.Ar jailid Ns | Ns Ar jailname filesystem
.Nm
.Cm unjail
.Ar jailid Ns | Ns Ar jailname filesystem
.Sh DESCRIPTION
.Bl -tag -width ""
.It Xo
.Nm
.Cm jail
.Ar jailid filesystem
.Xc
.Pp
Attaches the specified
.Ar filesystem
to the jail identified by JID
.Ar jailid .
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 functuinality, the jail needs the
.Va allow.mount
and
.Va allow.mount.zfs
parameters set to 1 and the
.Va enforce_statfs
parameter set to a value lower than 2.
.Pp
See
.Xr jail 8
for more information on managing jails and configuring the parameters above.
.It Xo
.Nm
.Cm unjail
.Ar jailid filesystem
.Xc
.Pp
Detaches the specified
.Ar filesystem
from the jail identified by JID
.Ar jailid .
.El
.Sh SEE ALSO
.Xr jail 8 ,
.Xr zfsprops 8
|
