1.\" 2.\" CDDL HEADER START 3.\" 4.\" The contents of this file are subject to the terms of the 5.\" Common Development and Distribution License (the "License"). 6.\" You may not use this file except in compliance with the License. 7.\" 8.\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9.\" or http://www.opensolaris.org/os/licensing. 10.\" See the License for the specific language governing permissions 11.\" and limitations under the License. 12.\" 13.\" When distributing Covered Code, include this CDDL HEADER in each 14.\" file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15.\" If applicable, add the following below this CDDL HEADER, with the 16.\" fields enclosed by brackets "[]" replaced with your own identifying 17.\" information: Portions Copyright [yyyy] [name of copyright owner] 18.\" 19.\" CDDL HEADER END 20.\" 21.\" 22.\" Copyright (c) 2009 Sun Microsystems, Inc. All Rights Reserved. 23.\" Copyright 2011 Joshua M. Clulow <josh@sysmgr.org> 24.\" Copyright (c) 2011, 2019 by Delphix. All rights reserved. 25.\" Copyright (c) 2011, Pawel Jakub Dawidek <pjd@FreeBSD.org> 26.\" Copyright (c) 2012, Glen Barber <gjb@FreeBSD.org> 27.\" Copyright (c) 2012, Bryan Drewery <bdrewery@FreeBSD.org> 28.\" Copyright (c) 2013, Steven Hartland <smh@FreeBSD.org> 29.\" Copyright (c) 2013 by Saso Kiselkov. All rights reserved. 30.\" Copyright (c) 2014, Joyent, Inc. All rights reserved. 31.\" Copyright (c) 2014 by Adam Stevko. All rights reserved. 32.\" Copyright (c) 2014 Integros [integros.com] 33.\" Copyright (c) 2014, Xin LI <delphij@FreeBSD.org> 34.\" Copyright (c) 2014-2015, The FreeBSD Foundation, All Rights Reserved. 35.\" Copyright (c) 2016 Nexenta Systems, Inc. All Rights Reserved. 36.\" Copyright 2019 Richard Laager. All rights reserved. 37.\" Copyright 2018 Nexenta Systems, Inc. 38.\" Copyright 2019 Joyent, Inc. 39.\" 40.Dd December 9, 2019 41.Dt ZFS-JAIL 8 42.Os FreeBSD 43.Sh NAME 44.Nm zfs Ns Pf - Cm jail 45.Nd Attaches and detaches ZFS filesystems from FreeBSD jails. 46.No A Tn ZFS 47dataset can be attached to a jail by using the 48.Qq Nm Cm jail 49subcommand. You cannot attach a dataset to one jail and the children of the 50same dataset to another jail. You can also not attach the root file system 51of the jail or any dataset which needs to be mounted before the zfs rc script 52is run inside the jail, as it would be attached unmounted until it is 53mounted from the rc script inside the jail. To allow management of the 54dataset from within a jail, the 55.Sy jailed 56property has to be set and the jail needs access to the 57.Pa /dev/zfs 58device. The 59.Sy quota 60property cannot be changed from within a jail. See 61.Xr jail 8 62for information on how to allow mounting 63.Tn ZFS 64datasets from within a jail. 65.Pp 66.No A Tn ZFS 67dataset can be detached from a jail using the 68.Qq Nm Cm unjail 69subcommand. 70.Pp 71After a dataset is attached to a jail and the jailed property is set, a jailed 72file system cannot be mounted outside the jail, since the jail administrator 73might have set the mount point to an unacceptable value. 74.Sh SYNOPSIS 75.Nm 76.Cm jail 77.Ar jailid Ns | Ns Ar jailname filesystem 78.Nm 79.Cm unjail 80.Ar jailid Ns | Ns Ar jailname filesystem 81.Sh DESCRIPTION 82.Bl -tag -width "" 83.It Xo 84.Nm 85.Cm jail 86.Ar jailid filesystem 87.Xc 88.Pp 89Attaches the specified 90.Ar filesystem 91to the jail identified by JID 92.Ar jailid . 93From now on this file system tree can be managed from within a jail if the 94.Sy jailed 95property has been set. To use this functuinality, the jail needs the 96.Va allow.mount 97and 98.Va allow.mount.zfs 99parameters set to 1 and the 100.Va enforce_statfs 101parameter set to a value lower than 2. 102.Pp 103See 104.Xr jail 8 105for more information on managing jails and configuring the parameters above. 106.It Xo 107.Nm 108.Cm unjail 109.Ar jailid filesystem 110.Xc 111.Pp 112Detaches the specified 113.Ar filesystem 114from the jail identified by JID 115.Ar jailid . 116.El 117.Sh SEE ALSO 118.Xr jail 8 , 119.Xr zfsprops 8 120