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41715771b5
This allows for printing a machine-readable, accurate to the second, hold creation time in the form of a unix epoch timestamp. Additionally, updates relevant documentation and man pages accordingly. Reviewed-by: Allan Jude <allan@klarasystems.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Mohamed Tawfik <m_tawfik@aucegypt.edu> Closes #13690 Closes #14152
115 lines
3.0 KiB
Groff
115 lines
3.0 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 June 30, 2019
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.Dt ZFS-HOLD 8
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.Os
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.
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.Sh NAME
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.Nm zfs-hold
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.Nd hold ZFS snapshots to prevent their removal
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.Sh SYNOPSIS
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.Nm zfs
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.Cm hold
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.Op Fl r
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.Ar tag Ar snapshot Ns …
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.Nm zfs
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.Cm holds
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.Op Fl rHp
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.Ar snapshot Ns …
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.Nm zfs
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.Cm release
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.Op Fl r
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.Ar tag Ar snapshot Ns …
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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 hold
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.Op Fl r
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.Ar tag Ar snapshot Ns …
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.Xc
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Adds a single reference, named with the
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.Ar tag
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argument, to the specified snapshots.
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Each snapshot has its own tag namespace, and tags must be unique within that
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space.
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.Pp
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If a hold exists on a snapshot, attempts to destroy that snapshot by using the
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.Nm zfs Cm destroy
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command return
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.Sy EBUSY .
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.Bl -tag -width "-r"
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.It Fl r
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Specifies that a hold with the given tag is applied recursively to the snapshots
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of all descendent file systems.
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.El
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.It Xo
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.Nm zfs
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.Cm holds
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.Op Fl rHp
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.Ar snapshot Ns …
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.Xc
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Lists all existing user references for the given snapshot or snapshots.
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.Bl -tag -width "-r"
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.It Fl r
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Lists the holds that are set on the named descendent snapshots, in addition to
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listing the holds on the named snapshot.
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.It Fl H
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Do not print headers, use tab-delimited output.
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.It Fl p
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Prints holds timestamps as unix epoch timestamps.
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.El
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.It Xo
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.Nm zfs
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.Cm release
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.Op Fl r
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.Ar tag Ar snapshot Ns …
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.Xc
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Removes a single reference, named with the
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.Ar tag
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argument, from the specified snapshot or snapshots.
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The tag must already exist for each snapshot.
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If a hold exists on a snapshot, attempts to destroy that snapshot by using the
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.Nm zfs Cm destroy
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command return
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.Sy EBUSY .
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.Bl -tag -width "-r"
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.It Fl r
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Recursively releases a hold with the given tag on the snapshots of all
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descendent file systems.
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.El
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.El
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.
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.Sh SEE ALSO
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.Xr zfs-destroy 8
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