15unionfilesystem

#!/usr/bin/php
<?php
/**
 * Copyright (C) 2016-2017 OpenMediaVault Plugin Developers.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
require_once '/usr/share/php/openmediavault/autoloader.inc';
require_once '/usr/share/php/openmediavault/globals.inc';

use OMV\Rpc\Rpc;

$context = ['username' => 'admin', 'role' => OMV_ROLE_ADMINISTRATOR];
$objects = Rpc::call('UnionFilesystems', 'getList', ['start' => 0, 'limit' => null], $context, Rpc::MODE_REMOTE);

foreach ($objects['data'] as $object) {
    $mntent = Rpc::call('FsTab', 'get', ['uuid' => $object['self-mntentref']], $context, Rpc::MODE_REMOTE);
    $mountPoint = $mntent['dir'];

    $options = !empty($object['options']) ? explode(',', $object['options']) : [];
    $options[] = 'category.create=' . $object['create-policy'];
    $options[] = 'minfreespace=' . $object['min-free-space'];

    $fs_members=array();
    foreach($object['mntentref'] as $fs_uuid ) {
        $mntent = Rpc::call('FsTab', 'get', ['uuid' => $fs_uuid ], $context, Rpc::MODE_REMOTE);
        $tmp = array(
            "dir" => $mntent['dir'],
            "type" => $mntent['type']
        );
        array_push($fs_members, $tmp);
    }

    foreach ($fs_members as $fs_member) {
        if ($fs_member['type'] != "zfs") {
            $cmd = "systemd-escape --path --suffix=mount " . $fs_member['dir'];
            $options[] = "x-systemd.requires=" . exec($cmd); 
        }
    }

    if (in_array('zfs', array_column($fs_members, 'type'))) {
        $options[] = "x-systemd.requires=zfs-mount.service";
    }

    $rowData = sprintf(
        '%s %s fuse.mergerfs %s 0 0',
        implode(':', array_column($fs_members, 'dir')),
        $mountPoint,
        implode(',', $options)
    );

    echo $rowData . PHP_EOL;
}