120 lines
3.7 KiB
Groff
120 lines
3.7 KiB
Groff
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.\"
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.\" CDDL HEADER START
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.\"
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.\" The contents of this file are subject to the terms of the
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.\" Common Development and Distribution License (the "License").
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.\" You may not use this file except in compliance with the License.
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.\"
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.\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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.\" or http://www.opensolaris.org/os/licensing.
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.\" See the License for the specific language governing permissions
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.\" and limitations under the License.
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.\"
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.\" When distributing Covered Code, include this CDDL HEADER in each
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.\" file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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.\" If applicable, add the following below this CDDL HEADER, with the
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.\" fields enclosed by brackets "[]" replaced with your own identifying
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.\" information: Portions Copyright [yyyy] [name of copyright owner]
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.\"
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.\" CDDL HEADER END
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.\"
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.\"
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.\" Copyright (c) 2009 Sun Microsystems, Inc. All Rights Reserved.
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.\" Copyright 2011 Joshua M. Clulow <josh@sysmgr.org>
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.\" Copyright (c) 2011, 2019 by Delphix. All rights reserved.
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.\" Copyright (c) 2011, Pawel Jakub Dawidek <pjd@FreeBSD.org>
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.\" Copyright (c) 2012, Glen Barber <gjb@FreeBSD.org>
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.\" Copyright (c) 2012, Bryan Drewery <bdrewery@FreeBSD.org>
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.\" Copyright (c) 2013, Steven Hartland <smh@FreeBSD.org>
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.\" Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
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.\" Copyright (c) 2014, Joyent, Inc. All rights reserved.
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.\" Copyright (c) 2014 by Adam Stevko. All rights reserved.
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.\" Copyright (c) 2014 Integros [integros.com]
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.\" Copyright (c) 2014, Xin LI <delphij@FreeBSD.org>
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.\" Copyright (c) 2014-2015, The FreeBSD Foundation, All Rights Reserved.
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.\" Copyright (c) 2016 Nexenta Systems, Inc. All Rights Reserved.
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.\" Copyright 2019 Richard Laager. All rights reserved.
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.\" Copyright 2018 Nexenta Systems, Inc.
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.\" Copyright 2019 Joyent, Inc.
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.\"
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.Dd December 9, 2019
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.Dt ZFS-JAIL 8
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.Os FreeBSD
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.Sh NAME
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.Nm zfs-jail
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.Nd Attaches and detaches ZFS filesystems from FreeBSD jails.
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.No A Tn ZFS
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dataset can be attached to a jail by using the
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.Qq Nm Cm jail
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subcommand. You cannot attach a dataset to one jail and the children of the
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same dataset to another jail. You can also not attach the root file system
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of the jail or any dataset which needs to be mounted before the zfs rc script
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is run inside the jail, as it would be attached unmounted until it is
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mounted from the rc script inside the jail. To allow management of the
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dataset from within a jail, the
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.Sy jailed
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property has to be set and the jail needs access to the
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.Pa /dev/zfs
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device. The
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.Sy quota
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property cannot be changed from within a jail. See
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.Xr jail 8
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for information on how to allow mounting
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.Tn ZFS
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datasets from within a jail.
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.Pp
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.No A Tn ZFS
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dataset can be detached from a jail using the
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.Qq Nm Cm unjail
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subcommand.
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.Pp
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After a dataset is attached to a jail and the jailed property is set, a jailed
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file system cannot be mounted outside the jail, since the jail administrator
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might have set the mount point to an unacceptable value.
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.Sh SYNOPSIS
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.Nm zfs
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.Cm jail
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.Ar jailid Ns | Ns Ar jailname filesystem
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.Nm zfs
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.Cm unjail
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.Ar jailid Ns | Ns Ar jailname filesystem
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.Sh DESCRIPTION
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.Bl -tag -width ""
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.It Xo
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.Nm zfs
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.Cm jail
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.Ar jailid filesystem
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.Xc
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.Pp
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Attaches the specified
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.Ar filesystem
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to the jail identified by JID
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.Ar jailid .
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From now on this file system tree can be managed from within a jail if the
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.Sy jailed
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property has been set. To use this functuinality, the jail needs the
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.Va allow.mount
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and
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.Va allow.mount.zfs
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parameters set to 1 and the
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.Va enforce_statfs
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parameter set to a value lower than 2.
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.Pp
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See
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.Xr jail 8
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for more information on managing jails and configuring the parameters above.
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.It Xo
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.Nm zfs
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.Cm unjail
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.Ar jailid filesystem
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.Xc
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.Pp
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Detaches the specified
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.Ar filesystem
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from the jail identified by JID
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.Ar jailid .
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.El
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.Sh SEE ALSO
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.Xr jail 8 ,
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.Xr zfsprops 8
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