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e9c08e21a5
* Fix more divide by zero issues fixes: 14932 * Round to the nearest integer, then cast * Fix up dhcpatriot
193 lines
5.3 KiB
PHP
193 lines
5.3 KiB
PHP
<?php
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namespace App\Models;
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use Illuminate\Support\Str;
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use LibreNMS\Interfaces\Models\Keyable;
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use LibreNMS\Util\Number;
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class Mempool extends DeviceRelatedModel implements Keyable
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{
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protected $table = 'mempools';
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protected $primaryKey = 'mempool_id';
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public $timestamps = false;
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protected $fillable = [
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'mempool_perc_warn',
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'mempool_index',
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'entPhysicalIndex',
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'mempool_type',
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'mempool_class',
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'mempool_precision',
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'mempool_descr',
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'mempool_perc',
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'mempool_perc_oid',
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'mempool_used',
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'mempool_used_oid',
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'mempool_free',
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'mempool_free_oid',
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'mempool_total',
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'mempool_total_oid',
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'mempool_largestfree',
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'mempool_lowestfree',
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];
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protected $attributes = [
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'mempool_precision' => 1,
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];
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public function __construct(array $attributes = [])
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{
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parent::__construct($attributes);
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if (! $this->exists) {
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// only allow mempool_perc_warn to be filled for new mempools
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unset($this->fillable[array_search('mempool_perc_warn', $this->fillable)]);
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}
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}
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public function isValid()
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{
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return $this->mempool_total > 0;
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}
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public function fillUsage($used = null, $total = null, $free = null, $percent = null)
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{
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try {
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$total = $this->correctNegative($total);
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$used = $this->correctNegative($used, $total);
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$free = $this->correctNegative($free, $total);
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} catch (\Exception $e) {
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d_echo($e->getMessage());
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return $this; // unhandled negative
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}
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$this->mempool_total = $this->calculateTotal($total, $used, $free);
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$this->mempool_used = $used * $this->mempool_precision;
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$this->mempool_free = $free * $this->mempool_precision;
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$percent = $this->normalizePercent($percent); // don't assign to model or it loses precision
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$this->mempool_perc = $percent;
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if (! $this->mempool_total) {
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if (! $percent && $percent !== 0.0) {
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// could not calculate total, can't calculate other values
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return $this;
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}
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$this->mempool_total = 100; // only have percent, mark total as 100
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}
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if ($used === null) {
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$this->mempool_used = $free !== null
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? $this->mempool_total - $this->mempool_free
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: round($this->mempool_total * ($percent ? ($percent / 100) : 0));
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}
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if ($free === null) {
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$this->mempool_free = $used !== null
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? $this->mempool_total - $this->mempool_used
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: round($this->mempool_total * ($percent ? (1 - ($percent / 100)) : 1));
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}
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if ($percent == null) {
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$this->mempool_perc = (int) Number::calculatePercent($this->mempool_used, $this->mempool_total, 0);
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}
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return $this;
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}
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/**
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* Set the mempool class. If no class is given, try to detect it from available data.
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*
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* @param string $class
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* @param string $default
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* @return \App\Models\Mempool
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*/
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public function setClass($class = null, $default = 'system')
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{
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if ($class) {
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$this->mempool_class = $class;
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return $this;
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}
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$memoryClasses = [
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'virtual' => ['virtual'],
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'swap' => ['swap'],
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'buffers' => ['buffers'],
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'cached' => ['cache'],
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'system' => ['shared real memory metrics'],
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'shared' => ['shared'],
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];
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$descr = strtolower($this->mempool_descr);
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foreach ($memoryClasses as $class => $search) {
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if (Str::contains($descr, $search)) {
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$this->mempool_class = $class;
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return $this;
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}
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}
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if ($default == 'virtual' && Str::contains($this->mempool_descr, ['/dev/'])) {
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$this->mempool_class = 'swap';
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return $this;
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}
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$this->mempool_class = $default;
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return $this;
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}
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public function setMempoolPercAttribute($percent)
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{
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$this->attributes['mempool_perc'] = is_numeric($percent) ? round($percent) : null;
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}
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public function getCompositeKey()
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{
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return "$this->mempool_type-$this->mempool_index";
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}
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private function correctNegative($value, $max = null)
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{
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$int_max = 4294967296;
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if ($value < 0) {
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// assume unsigned/signed issue
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$value = $int_max + $value;
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if (($max && $value > $max) || $value > $int_max) {
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throw new \Exception('Uncorrectable negative value');
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}
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}
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return $value;
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}
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private function calculateTotal($total, $used, $free)
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{
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if ($total !== null) {
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return (int) $total * $this->mempool_precision;
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}
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if ($used !== null && $free !== null) {
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return ($used + $free) * $this->mempool_precision;
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}
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return $this->mempool_total; // don't change the value it may have been set in discovery
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}
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private function normalizePercent($percent)
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{
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if ($percent === null) {
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return null;
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}
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$percent = floatval($percent);
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while ($percent > 100) {
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$percent = $percent / 10;
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}
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return $percent;
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}
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}
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