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The commit replaces all findings of the link: http://www.opensolaris.org/os/licensing with this one: https://opensource.org/licenses/CDDL-1.0 Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Tino Reichardt <milky-zfs@mcmilk.de> Closes #13619
493 lines
15 KiB
Groff
493 lines
15 KiB
Groff
.\"
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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 https://opensource.org/licenses/CDDL-1.0.
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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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.\" 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) 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 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 March 16, 2022
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.Dt ZFS-ALLOW 8
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.Os
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.
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.Sh NAME
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.Nm zfs-allow
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.Nd delegate ZFS administration permissions to unprivileged users
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.Sh SYNOPSIS
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.Nm zfs
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.Cm allow
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.Op Fl dglu
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.Ar user Ns | Ns Ar group Ns Oo , Ns Ar user Ns | Ns Ar group Oc Ns …
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.Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
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.Ar setname Oc Ns …
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.Ar filesystem Ns | Ns Ar volume
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.Nm zfs
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.Cm allow
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.Op Fl dl
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.Fl e Ns | Ns Sy everyone
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.Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
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.Ar setname Oc Ns …
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.Ar filesystem Ns | Ns Ar volume
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.Nm zfs
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.Cm allow
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.Fl c
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.Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
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.Ar setname Oc Ns …
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.Ar filesystem Ns | Ns Ar volume
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.Nm zfs
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.Cm allow
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.Fl s No @ Ns Ar setname
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.Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
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.Ar setname Oc Ns …
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.Ar filesystem Ns | Ns Ar volume
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.Nm zfs
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.Cm unallow
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.Op Fl dglru
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.Ar user Ns | Ns Ar group Ns Oo , Ns Ar user Ns | Ns Ar group Oc Ns …
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.Oo Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
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.Ar setname Oc Ns … Oc
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.Ar filesystem Ns | Ns Ar volume
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.Nm zfs
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.Cm unallow
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.Op Fl dlr
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.Fl e Ns | Ns Sy everyone
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.Oo Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
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.Ar setname Oc Ns … Oc
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.Ar filesystem Ns | Ns Ar volume
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.Nm zfs
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.Cm unallow
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.Op Fl r
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.Fl c
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.Oo Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
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.Ar setname Oc Ns … Oc
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.Ar filesystem Ns | Ns Ar volume
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.Nm zfs
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.Cm unallow
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.Op Fl r
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.Fl s No @ Ns Ar setname
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.Oo Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
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.Ar setname Oc Ns … Oc
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.Ar filesystem Ns | Ns Ar volume
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.
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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 allow
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.Ar filesystem Ns | Ns Ar volume
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.Xc
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Displays permissions that have been delegated on the specified filesystem or
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volume.
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See the other forms of
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.Nm zfs Cm allow
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for more information.
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.Pp
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Delegations are supported under Linux with the exception of
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.Sy mount ,
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.Sy unmount ,
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.Sy mountpoint ,
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.Sy canmount ,
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.Sy rename ,
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and
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.Sy share .
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These permissions cannot be delegated because the Linux
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.Xr mount 8
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command restricts modifications of the global namespace to the root user.
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.It Xo
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.Nm zfs
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.Cm allow
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.Op Fl dglu
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.Ar user Ns | Ns Ar group Ns Oo , Ns Ar user Ns | Ns Ar group Oc Ns …
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.Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
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.Ar setname Oc Ns …
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.Ar filesystem Ns | Ns Ar volume
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.Xc
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.It Xo
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.Nm zfs
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.Cm allow
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.Op Fl dl
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.Fl e Ns | Ns Sy everyone
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.Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
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.Ar setname Oc Ns …
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.Ar filesystem Ns | Ns Ar volume
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.Xc
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Delegates ZFS administration permission for the file systems to non-privileged
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users.
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.Bl -tag -width "-d"
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.It Fl d
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Allow only for the descendent file systems.
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.It Fl e Ns | Ns Sy everyone
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Specifies that the permissions be delegated to everyone.
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.It Fl g Ar group Ns Oo , Ns Ar group Oc Ns …
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Explicitly specify that permissions are delegated to the group.
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.It Fl l
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Allow
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.Qq locally
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only for the specified file system.
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.It Fl u Ar user Ns Oo , Ns Ar user Oc Ns …
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Explicitly specify that permissions are delegated to the user.
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.It Ar user Ns | Ns Ar group Ns Oo , Ns Ar user Ns | Ns Ar group Oc Ns …
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Specifies to whom the permissions are delegated.
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Multiple entities can be specified as a comma-separated list.
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If neither of the
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.Fl gu
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options are specified, then the argument is interpreted preferentially as the
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keyword
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.Sy everyone ,
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then as a user name, and lastly as a group name.
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To specify a user or group named
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.Qq everyone ,
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use the
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.Fl g
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or
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.Fl u
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options.
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To specify a group with the same name as a user, use the
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.Fl g
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options.
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.It Xo
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.Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
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.Ar setname Oc Ns …
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.Xc
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The permissions to delegate.
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Multiple permissions may be specified as a comma-separated list.
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Permission names are the same as ZFS subcommand and property names.
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See the property list below.
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Property set names, which begin with
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.Sy @ ,
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may be specified.
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See the
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.Fl s
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form below for details.
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.El
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.Pp
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If neither of the
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.Fl dl
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options are specified, or both are, then the permissions are allowed for the
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file system or volume, and all of its descendents.
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.Pp
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Permissions are generally the ability to use a ZFS subcommand or change a ZFS
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property.
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The following permissions are available:
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.TS
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l l l .
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NAME TYPE NOTES
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_ _ _
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allow subcommand Must also have the permission that is being allowed
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bookmark subcommand
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clone subcommand Must also have the \fBcreate\fR ability and \fBmount\fR ability in the origin file system
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create subcommand Must also have the \fBmount\fR ability. Must also have the \fBrefreservation\fR ability to create a non-sparse volume.
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destroy subcommand Must also have the \fBmount\fR ability
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diff subcommand Allows lookup of paths within a dataset given an object number, and the ability to create snapshots necessary to \fBzfs diff\fR.
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hold subcommand Allows adding a user hold to a snapshot
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load-key subcommand Allows loading and unloading of encryption key (see \fBzfs load-key\fR and \fBzfs unload-key\fR).
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change-key subcommand Allows changing an encryption key via \fBzfs change-key\fR.
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mount subcommand Allows mounting/umounting ZFS datasets
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promote subcommand Must also have the \fBmount\fR and \fBpromote\fR ability in the origin file system
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receive subcommand Must also have the \fBmount\fR and \fBcreate\fR ability
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release subcommand Allows releasing a user hold which might destroy the snapshot
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rename subcommand Must also have the \fBmount\fR and \fBcreate\fR ability in the new parent
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rollback subcommand Must also have the \fBmount\fR ability
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send subcommand
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share subcommand Allows sharing file systems over NFS or SMB protocols
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snapshot subcommand Must also have the \fBmount\fR ability
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groupquota other Allows accessing any \fBgroupquota@\fI…\fR property
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groupobjquota other Allows accessing any \fBgroupobjquota@\fI…\fR property
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groupused other Allows reading any \fBgroupused@\fI…\fR property
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groupobjused other Allows reading any \fBgroupobjused@\fI…\fR property
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userprop other Allows changing any user property
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userquota other Allows accessing any \fBuserquota@\fI…\fR property
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userobjquota other Allows accessing any \fBuserobjquota@\fI…\fR property
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userused other Allows reading any \fBuserused@\fI…\fR property
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userobjused other Allows reading any \fBuserobjused@\fI…\fR property
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projectobjquota other Allows accessing any \fBprojectobjquota@\fI…\fR property
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projectquota other Allows accessing any \fBprojectquota@\fI…\fR property
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projectobjused other Allows reading any \fBprojectobjused@\fI…\fR property
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projectused other Allows reading any \fBprojectused@\fI…\fR property
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aclinherit property
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aclmode property
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acltype property
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atime property
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canmount property
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casesensitivity property
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checksum property
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compression property
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context property
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copies property
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dedup property
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defcontext property
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devices property
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dnodesize property
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encryption property
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exec property
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filesystem_limit property
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fscontext property
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keyformat property
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keylocation property
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logbias property
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mlslabel property
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mountpoint property
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nbmand property
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normalization property
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overlay property
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pbkdf2iters property
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primarycache property
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quota property
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readonly property
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recordsize property
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redundant_metadata property
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refquota property
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refreservation property
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relatime property
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reservation property
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rootcontext property
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secondarycache property
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setuid property
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sharenfs property
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sharesmb property
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snapdev property
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snapdir property
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snapshot_limit property
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special_small_blocks property
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sync property
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utf8only property
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version property
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volblocksize property
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volmode property
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volsize property
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vscan property
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xattr property
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zoned property
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.TE
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.It Xo
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.Nm zfs
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.Cm allow
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.Fl c
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.Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
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.Ar setname Oc Ns …
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.Ar filesystem Ns | Ns Ar volume
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.Xc
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Sets
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.Qq create time
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permissions.
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These permissions are granted
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.Pq locally
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to the creator of any newly-created descendent file system.
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.It Xo
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.Nm zfs
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.Cm allow
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.Fl s No @ Ns Ar setname
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.Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
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.Ar setname Oc Ns …
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.Ar filesystem Ns | Ns Ar volume
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.Xc
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Defines or adds permissions to a permission set.
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The set can be used by other
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.Nm zfs Cm allow
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commands for the specified file system and its descendents.
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Sets are evaluated dynamically, so changes to a set are immediately reflected.
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Permission sets follow the same naming restrictions as ZFS file systems, but the
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name must begin with
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.Sy @ ,
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and can be no more than 64 characters long.
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.It Xo
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.Nm zfs
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.Cm unallow
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.Op Fl dglru
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.Ar user Ns | Ns Ar group Ns Oo , Ns Ar user Ns | Ns Ar group Oc Ns …
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.Oo Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
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.Ar setname Oc Ns … Oc
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.Ar filesystem Ns | Ns Ar volume
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.Xc
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.It Xo
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.Nm zfs
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.Cm unallow
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.Op Fl dlr
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.Fl e Ns | Ns Sy everyone
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.Oo Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
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.Ar setname Oc Ns … Oc
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.Ar filesystem Ns | Ns Ar volume
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.Xc
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.It Xo
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.Nm zfs
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.Cm unallow
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.Op Fl r
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.Fl c
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.Oo Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
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.Ar setname Oc Ns … Oc
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.Ar filesystem Ns | Ns Ar volume
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.Xc
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Removes permissions that were granted with the
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.Nm zfs Cm allow
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command.
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No permissions are explicitly denied, so other permissions granted are still in
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effect.
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For example, if the permission is granted by an ancestor.
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If no permissions are specified, then all permissions for the specified
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.Ar user ,
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.Ar group ,
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or
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.Sy everyone
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are removed.
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Specifying
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.Sy everyone
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.Po or using the
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.Fl e
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option
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.Pc
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only removes the permissions that were granted to everyone, not all permissions
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for every user and group.
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See the
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.Nm zfs Cm allow
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command for a description of the
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.Fl ldugec
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options.
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.Bl -tag -width "-r"
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.It Fl r
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Recursively remove the permissions from this file system and all descendents.
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.El
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.It Xo
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.Nm zfs
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.Cm unallow
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.Op Fl r
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.Fl s No @ Ns Ar setname
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.Oo Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
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.Ar setname Oc Ns … Oc
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.Ar filesystem Ns | Ns Ar volume
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.Xc
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Removes permissions from a permission set.
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If no permissions are specified, then all permissions are removed, thus removing
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the set entirely.
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.El
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.
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.Sh EXAMPLES
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.\" These are, respectively, examples 17, 18, 19, 20 from zfs.8
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.\" Make sure to update them bidirectionally
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.Ss Example 1 : No Delegating ZFS Administration Permissions on a ZFS Dataset
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The following example shows how to set permissions so that user
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.Ar cindys
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can create, destroy, mount, and take snapshots on
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.Ar tank/cindys .
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The permissions on
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.Ar tank/cindys
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are also displayed.
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.Bd -literal -compact -offset Ds
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.No # Nm zfs Cm allow Sy cindys create , Ns Sy destroy , Ns Sy mount , Ns Sy snapshot Ar tank/cindys
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.No # Nm zfs Cm allow Ar tank/cindys
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---- Permissions on tank/cindys --------------------------------------
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Local+Descendent permissions:
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user cindys create,destroy,mount,snapshot
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.Ed
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.Pp
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Because the
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.Ar tank/cindys
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mount point permission is set to 755 by default, user
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.Ar cindys
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will be unable to mount file systems under
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.Ar tank/cindys .
|
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Add an ACE similar to the following syntax to provide mount point access:
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.Dl # Cm chmod No A+user: Ns Ar cindys Ns :add_subdirectory:allow Ar /tank/cindys
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.
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.Ss Example 2 : No Delegating Create Time Permissions on a ZFS Dataset
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The following example shows how to grant anyone in the group
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.Ar staff
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to create file systems in
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.Ar tank/users .
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This syntax also allows staff members to destroy their own file systems, but not
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destroy anyone else's file system.
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The permissions on
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.Ar tank/users
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are also displayed.
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.Bd -literal -compact -offset Ds
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.No # Nm zfs Cm allow Ar staff Sy create , Ns Sy mount Ar tank/users
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.No # Nm zfs Cm allow Fl c Sy destroy Ar tank/users
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.No # Nm zfs Cm allow Ar tank/users
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---- Permissions on tank/users ---------------------------------------
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Permission sets:
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destroy
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Local+Descendent permissions:
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group staff create,mount
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.Ed
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.
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.Ss Example 3 : No Defining and Granting a Permission Set on a ZFS Dataset
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The following example shows how to define and grant a permission set on the
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.Ar tank/users
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file system.
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The permissions on
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.Ar tank/users
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are also displayed.
|
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.Bd -literal -compact -offset Ds
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.No # Nm zfs Cm allow Fl s No @ Ns Ar pset Sy create , Ns Sy destroy , Ns Sy snapshot , Ns Sy mount Ar tank/users
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.No # Nm zfs Cm allow staff No @ Ns Ar pset tank/users
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.No # Nm zfs Cm allow Ar tank/users
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---- Permissions on tank/users ---------------------------------------
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Permission sets:
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@pset create,destroy,mount,snapshot
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Local+Descendent permissions:
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group staff @pset
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.Ed
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.
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.Ss Example 4 : No Delegating Property Permissions on a ZFS Dataset
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The following example shows to grant the ability to set quotas and reservations
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on the
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.Ar users/home
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file system.
|
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The permissions on
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.Ar users/home
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|
are also displayed.
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.Bd -literal -compact -offset Ds
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.No # Nm zfs Cm allow Ar cindys Sy quota , Ns Sy reservation Ar users/home
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.No # Nm zfs Cm allow Ar users/home
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---- Permissions on users/home ---------------------------------------
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Local+Descendent permissions:
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user cindys quota,reservation
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cindys% zfs set quota=10G users/home/marks
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cindys% zfs get quota users/home/marks
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NAME PROPERTY VALUE SOURCE
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users/home/marks quota 10G local
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.Ed
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.
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.Ss Example 5 : No Removing ZFS Delegated Permissions on a ZFS Dataset
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The following example shows how to remove the snapshot permission from the
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.Ar staff
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group on the
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.Sy tank/users
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file system.
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The permissions on
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.Sy tank/users
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are also displayed.
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.Bd -literal -compact -offset Ds
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.No # Nm zfs Cm unallow Ar staff Sy snapshot Ar tank/users
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.No # Nm zfs Cm allow Ar tank/users
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---- Permissions on tank/users ---------------------------------------
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Permission sets:
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@pset create,destroy,mount,snapshot
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Local+Descendent permissions:
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group staff @pset
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.Ed
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