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Have libzfs call a special `zfs_prepare_disk` script before a disk is included into the pool. The user can edit this script to add things like a disk firmware update or a disk health check. Use of the script is totally optional. See the zfs_prepare_disk manpage for full details. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Tony Hutter <hutter2@llnl.gov> Closes #15243
71 lines
2.4 KiB
Groff
71 lines
2.4 KiB
Groff
.\"
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.\" Developed at Lawrence Livermore National Laboratory (LLNL-CODE-403049).
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.\" Copyright (C) 2023 Lawrence Livermore National Security, LLC.
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.\" Refer to the OpenZFS git commit log for authoritative copyright attribution.
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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 Version 1.0 (CDDL-1.0).
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.\" You can obtain a copy of the license from the top-level file
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.\" "OPENSOLARIS.LICENSE" or at <http://opensource.org/licenses/CDDL-1.0>.
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.\" You may not use this file except in compliance with the license.
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.\"
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.\" Developed at Lawrence Livermore National Laboratory (LLNL-CODE-403049)
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.\"
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.Dd August 30, 2023
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.Dt ZFS_PREPARE_DISK 8
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.Os
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.
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.Sh NAME
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.Nm zfs_prepare_disk
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.Nd special script that gets run before bringing a disk into a pool
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.Sh DESCRIPTION
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.Nm
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is an optional script that gets called by libzfs before bringing a disk into a
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pool.
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It can be modified by the user to run whatever commands are necessary to prepare
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a disk for inclusion into the pool.
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For example, users can add lines to
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.Nm zfs_prepare_disk
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to do things like update the drive's firmware or check the drive's health.
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.Nm zfs_prepare_disk
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is optional and can be removed if not needed.
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libzfs will look for the script at @zfsexecdir@/zfs_prepare_disk.
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.
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.Ss Properties
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.Nm zfs_prepare_disk
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will be passed the following environment variables:
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.sp
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.Bl -tag -compact -width "VDEV_ENC_SYSFS_PATH"
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.
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.It Nm POOL_NAME
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.No Name of the pool
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.It Nm VDEV_PATH
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.No Path to the disk (like /dev/sda)
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.It Nm VDEV_PREPARE
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.No Reason why the disk is being prepared for inclusion
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('create', 'add', 'replace', or 'autoreplace').
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This can be useful if you only want the script to be run under certain actions.
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.It Nm VDEV_UPATH
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.No Path to one of the underlying devices for the
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disk.
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For multipath this would return one of the /dev/sd* paths to the disk.
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If the device is not a device mapper device, then
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.Nm VDEV_UPATH
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just returns the same value as
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.Nm VDEV_PATH
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.It Nm VDEV_ENC_SYSFS_PATH
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.No Path to the disk's enclosure sysfs path, if available
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.El
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.Pp
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Note that some of these variables may have a blank value.
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.Nm POOL_NAME
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is blank at pool creation time, for example.
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.Sh ENVIRONMENT
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.Nm zfs_prepare_disk
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runs with a limited $PATH.
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.Sh EXIT STATUS
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.Nm zfs_prepare_disk
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should return 0 on success, non-zero otherwise.
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If non-zero is returned, the disk will not be included in the pool.
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.
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