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Add a mechanism to wait for delete queue to drain. When doing redacted send/recv, many workflows involve deleting files that contain sensitive data. Because of the way zfs handles file deletions, snapshots taken quickly after a rm operation can sometimes still contain the file in question, especially if the file is very large. This can result in issues for redacted send/recv users who expect the deleted files to be redacted in the send streams, and not appear in their clones. This change duplicates much of the zpool wait related logic into a zfs wait command, which can be used to wait until the internal deleteq has been drained. Additional wait activities may be added in the future. Reviewed-by: Matthew Ahrens <mahrens@delphix.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: John Gallagher <john.gallagher@delphix.com> Signed-off-by: Paul Dagnelie <pcd@delphix.com> Closes #9707
72 lines
2.3 KiB
Groff
72 lines
2.3 KiB
Groff
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.\" CDDL HEADER END
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.\" Copyright (c) 2007, Sun Microsystems, Inc. All Rights Reserved.
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.\" Copyright (c) 2012, 2018 by Delphix. All rights reserved.
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.\" Copyright (c) 2012 Cyril Plisko. All Rights Reserved.
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.\" Copyright (c) 2017 Datto Inc.
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.\" Copyright (c) 2018 George Melikov. All Rights Reserved.
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.\" Copyright 2017 Nexenta Systems, Inc.
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.\" Copyright (c) 2017 Open-E, Inc. All Rights Reserved.
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.\"
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.Dd August 9, 2019
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.Dt ZFS-WAIT 8
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.Os Linux
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.Sh NAME
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.Nm zfs Ns Pf - Cm wait
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.Nd Wait for background activity to stop in a ZFS filesystem
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.Sh SYNOPSIS
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.Nm
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.Cm wait
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.Op Fl t Ar activity Ns Oo , Ns Ar activity Ns Oc Ns ...
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.Ar fs
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.Sh DESCRIPTION
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.Bl -tag -width Ds
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.It Xo
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.Nm
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.Cm wait
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.Op Fl t Ar activity Ns Oo , Ns Ar activity Ns Oc Ns ...
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.Ar fs
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.Xc
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Waits until all background activity of the given types has ceased in the given
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filesystem.
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The activity could cease because it has completed or because the filesystem has
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been destroyed or unmounted.
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If no activities are specified, the command waits until background activity of
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every type listed below has ceased.
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If there is no activity of the given types in progress, the command returns
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immediately.
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.Pp
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These are the possible values for
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.Ar activity ,
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along with what each one waits for:
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.Bd -literal
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deleteq The filesystem's internal delete queue to empty
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.Ed
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.Pp
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Note that the internal delete queue does not finish draining until
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all large files have had time to be fully destroyed and all open file
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handles to unlinked files are closed.
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.El
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.El
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.Sh SEE ALSO
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.Xr lsof 8
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