#!/usr/local/bin/php-cgi -f
<?php
/*
	gmirror_status_check.php
	Copyright (C) 2014 Jim Pingle
	Copyright (C) 2013-2015 Electric Sheep Fencing, LP

	Redistribution and use in source and binary forms, with or without
	modification, are permitted provided that the following conditions are met:

	1. Redistributions of source code must retain the above copyright notice,
	   this list of conditions and the following disclaimer.

	2. Redistributions in binary form must reproduce the above copyright
	   notice, this list of conditions and the following disclaimer in the
	   documentation and/or other materials provided with the distribution.

	THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
	INClUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
	AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
	AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
	OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
	SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
	INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
	CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
	POSSIBILITY OF SUCH DAMAGE.
*/

/*
	pfSense_BUILDER_BINARIES:	/sbin/gmirror	/sbin/geom	/usr/bin/grep	/usr/bin/egrep	/usr/bin/cut	/usr/bin/head
	pfSense_BUILDER_BINARIES:	/sbin/mount	/usr/bin/awk	/usr/bin/sed
	pfSense_MODULE:	gmirror
*/

require_once("config.inc");
require_once("notices.inc");
require_once("globals.inc");
require_once("gmirror.inc");

global $g;
$status_file = "{$g['varrun_path']}/gmirror.status";

$mirror_status = gmirror_get_status();
$mirror_list = array_keys($mirror_status);
sort($mirror_list);
$notices = array();

// Check for gmirror.status
if (file_exists($status_file)) {
	// If it exists, read status in
	$previous_mirror_status = unserialize(file_get_contents($status_file));
	$previous_mirror_list = array_keys($previous_mirror_status);
	sort($previous_mirror_list);
	if (count($previous_mirror_status) > 0) {
		// Check list of current mirrors vs old mirrors, notify if one has appeared/disappeared
		if ($mirror_list != $previous_mirror_list) {
			$notices[] = sprintf(gettext("List of mirrors changed. Old: (%s) New: (%s)"), implode(", ", $previous_mirror_list), implode(", ", $mirror_list));
		}

		// For each mirror, check the mirror status, notify if changed
		foreach ($mirror_list as $mirror) {
			if (is_array($previous_mirror_status[$mirror])) {
				// Notify if the status changed
				if ($mirror_status[$mirror]['status'] != $previous_mirror_status[$mirror]['status']) {
					$notices[] = sprintf(gettext("Mirror %s status changed from %s to %s."), $mirror, $previous_mirror_status[$mirror]['status'], $mirror_status[$mirror]['status']);
				}
				// Notify if the drive count changed
				if (count($mirror_status[$mirror]['components']) != count($previous_mirror_status[$mirror]['components'])) {
					// Notify if the consumer count changed.
					$notices[] = sprintf(gettext("Mirror %s consumer count changed from %d to %d."), $mirror, count($previous_mirror_status[$mirror]['components']), count($mirror_status[$mirror]['components']));
				}
				if (strtoupper($mirror_status[$mirror]['status']) == "DEGRADED") {
					// Check the drive status as it may be different.
					asort($mirror_status[$mirror]['components']);
					asort($previous_mirror_status[$mirror]['components']);
					if ($mirror_status[$mirror]['components'] != $previous_mirror_status[$mirror]['components']) {
						$notices[] = sprintf(gettext("Mirror %s drive status changed. Old: (%s) New: (%s)"),
								$mirror,
								implode(", ", $previous_mirror_status[$mirror]['components']),
								implode(", ", $mirror_status[$mirror]['components']));
					}
				}
			}
		}
	}
}
if (count($notices)) {
	file_notice("gmirror", implode("\n ", $notices), "GEOM Mirror Status Change", 1);
}
// Write out current status if changed
if ($mirror_status != $previous_mirror_status) {
	file_put_contents($status_file, serialize($mirror_status));
}

?>