feature: Added ZFS support for FreeBSD (#7938)

* add the ZFS graphs

* And now the ZFS non-graph stuff.

Still need to move it over to using JSON.

* Now uses JSON.

* use stripslashes as SNMPD loves to slash up the JSON

* Document ZFS.

* very minor formatting cleanup

* minor formatting cleanup and remove a bit of code from when I was mucking around debugging it all

html/pages/apps.inc.php

@@ -283,6 +283,19 @@ $graphs['freeradius'] = array(
     'queue',
 );
 
+$graphs['zfs'] = array(
+    'arc_misc',
+    'arc_size',
+    'arc_size_per',
+    'arc_size_breakdown',
+    'arc_efficiency',
+    'arc_cache_hits_by_list',
+    'arc_cache_hits_by_type',
+    'arc_cache_misses_by_type',
+    'arc_cache_hits',
+    'arc_cache_miss',
+);
+
 print_optionbar_start();
 
 echo "<span style='font-weight: bold;'>Apps</span> &#187; ";

html/pages/device/apps/zfs.inc.php

@@ -0,0 +1,83 @@
+<?php
+
+global $config;
+
+$pools=get_zfs_pools($device['device_id']);
+
+$link_array = array(
+    'page'   => 'device',
+    'device' => $device['device_id'],
+    'tab'    => 'apps',
+    'app'    => 'zfs',
+);
+
+print_optionbar_start();
+
+echo generate_link('ARC', $link_array);
+echo '| Pools:';
+$pool_int=0;
+while (isset($pools[$pool_int])) {
+    $pool=$pools[$pool_int];
+    $label=$pool;
+
+    if ($vars['pool'] == $pool) {
+        $label='>>'.$pool.'<<';
+    }
+
+    $pool_int++;
+
+    $append='';
+    if (isset($pools[$pool_int])) {
+        $append=', ';
+    }
+
+    echo generate_link($label, $link_array, array('pool'=>$pool)).$append;
+}
+
+print_optionbar_end();
+
+if (!isset($vars['pool'])) {
+    $graphs = array(
+        'zfs_arc_misc' => 'ARC misc',
+        'zfs_arc_size' => 'ARC size in bytes',
+        'zfs_arc_size_per' => 'ARC size, percent of max size',
+        'zfs_arc_size_breakdown' => 'ARC size breakdown',
+        'zfs_arc_efficiency' => 'ARC efficiency',
+        'zfs_arc_cache_hits_by_list' => 'ARC cache hits by list',
+        'zfs_arc_cache_hits_by_type' => 'ARC cache hits by type',
+        'zfs_arc_cache_misses_by_type' => 'ARC cache misses by type',
+        'zfs_arc_cache_hits' => 'ARC cache hits',
+        'zfs_arc_cache_miss' => 'ARC cache misses',
+    );
+} else {
+    $graphs = array(
+        'zfs_pool_space'=>'Pool Space',
+        'zfs_pool_cap'=>'Pool Capcity',
+        'zfs_pool_frag'=>'Pool Fragmentation',
+    );
+}
+
+foreach ($graphs as $key => $text) {
+    $graph_type            = $key;
+    $graph_array['height'] = '100';
+    $graph_array['width']  = '215';
+    $graph_array['to']     = $config['time']['now'];
+    $graph_array['id']     = $app['app_id'];
+    $graph_array['type']   = 'application_'.$key;
+
+    if (isset($vars['pool'])) {
+        $graph_array['pool']=$vars['pool'];
+    }
+
+
+    echo '<div class="panel panel-default">
+    <div class="panel-heading">
+        <h3 class="panel-title">'.$text.'</h3>
+    </div>
+    <div class="panel-body">
+    <div class="row">';
+    include 'includes/print-graphrow.inc.php';
+    echo '</div>';
+    echo '</div>';
+    echo '</div>';
+}