src/Zvol.php

   1 <?php
   2 require_once("Exception.php");
   3 require_once("openmediavault/util.inc");
   4
   5 /**
   6  * XXX detailed description
   7  *
   8  * @author    XXX
   9  * @version   XXX
  10  * @copyright XXX
  11  */
  12 class OMVModuleZFSZvol {
  13         // Attributes
  14
  15         /**
  16          * Name of Zvol
  17          *
  18          * @var string $name
  19          * @access private
  20          */
  21         private $name;
  22
  23         /**
  24          * Size of Zvol
  25          *
  26          * @var string $size
  27          * @access private
  28          */
  29         private $size;
  30
  31         /**
  32          * Array with properties assigned to the Zvol
  33          *
  34          * @var    array $properties
  35          * @access private
  36          */
  37         private $properties;
  38
  39         // Associations
  40         // Operations
  41
  42         /**
  43          * Constructor. If the Zvol already exists in the system the object will be updated with all
  44          * associated properties from commandline.
  45          *
  46          * @param string $name Name of the new Zvol
  47          * @return void
  48          * @access public
  49          */
  50         public function __construct($name) {
  51                 $this->name = $name;
  52                 $qname = preg_quote($name, '/');
  53                 $cmd = "zfs list -H -t volume";
  54                 $this->exec($cmd, $out, $res);
  55                 foreach ($out as $line) {
  56                         if (preg_match('/^' . $qname . '\t.*$/', $line)) {
  57                                 $this->updateAllProperties();
  58                                 $this->size = $this->properties["volsize"]["value"];
  59                                 continue;
  60                         }
  61                 }
  62         }
  63
  64         /**
  65          * Return name of the Zvol
  66          *
  67          * @return string $name
  68          * @access public
  69          */
  70         public function getName() {
  71                 return $this->name;
  72         }
  73
  74         /**
  75          * Get a single property value associated with the Zvol
  76          *
  77          * @param string $property Name of the property to fetch
  78          * @return array The returned array with the property. The property is an associative array with
  79          * two elements, <value> and <source>.
  80          * @access public
  81          */
  82         public function getProperty($property) {
  83                 return $this->properties["$property"];
  84         }
  85
  86         /**
  87          * Get an associative array of all properties associated with the Zvol
  88          *
  89          * @return array $properties Each entry is an associative array with two elements
  90          * <value> and <source>
  91          * @access public
  92          */
  93         public function getProperties() {
  94                 return $this->properties;
  95         }
  96
  97         /**
  98          * Get the total size of the Zvol
  99          *
 100          * @return string $size
 101          * @access public
 102          */
 103         public function getSize() {
 104                 return $this->size;
 105         }
 106
 107         /**
 108          * Sets a number of Zvol properties. If a property is already set it will be updated with the new value.
 109          *
 110          * @param  array $properties An associative array with properties to set
 111          * @return void
 112          * @access public
 113          */
 114         public function setProperties($properties) {
 115                 foreach ($properties as $newpropertyk => $newpropertyv) {
 116                         $cmd = "zfs set " . $newpropertyk . "=" . $newpropertyv . " " . $this->name;
 117                         $this->exec($cmd,$out,$res);
 118                         $this->updateProperty($newpropertyk);
 119                 }
 120         }
 121
 122         /**
 123          * Get all Zvol properties from commandline and update object properties attribute
 124          *
 125          * @return void
 126          * @access private
 127          */
 128         private function updateAllProperties() {
 129                 $cmd = "zfs get -H all " . $this->name;
 130                 $this->exec($cmd,$out,$res);
 131                 unset($this->properties);
 132                 foreach ($out as $line) {
 133                         $tmpary = preg_split('/\t+/', $line);
 134                         $this->properties["$tmpary[1]"] = array("value" => $tmpary[2], "source" => $tmpary[3]);
 135                 }
 136         }
 137
 138         /**
 139          * Create a Zvol on commandline. Optionally provide a number of properties to set.
 140          *
 141          * @param string $size Size of the Zvol that should be created
 142          * @param array $properties Properties to set when creatiing the dataset.
 143          * @param boolean $sparse Defines if a sparse volume should be created.
 144          * @return void
 145          * @access public
 146          */
 147         public function create($size, array $properties = null, $sparse = null) {
 148                 $cmd = "zfs create -p ";
 149                 if (isset($sparse) && $sparse == true) {
 150                         $cmd .= "-s ";
 151                 }
 152                 $cmd .= "-V " . $size . " " . $this->name . " 2>&1";
 153                 $this->exec($cmd,$out,$res);
 154                 $this->updateAllProperties();
 155                 $this->setProperties($properties);
 156                 $this->size = $this->properties["volsize"]["value"];
 157         }
 158
 159         /**
 160          * Destroy the Zvol.
 161          *
 162          * @return void
 163          * @access public
 164          */
 165         public function destroy() {
 166                 $cmd = "zfs destroy " . $this->name;
 167                 $this->exec($cmd,$out,$res);
 168         }
 169
 170         /**
 171          * Helper function to execute a command and throw an exception on error
 172          * (requires stderr redirected to stdout for proper exception message).
 173          *
 174          * @param string $cmd Command to execute
 175          * @param array &$out If provided will contain output in an array
 176          * @param int &$res If provided will contain Exit status of the command
 177          * @return string Last line of output when executing the command
 178          * @throws OMVModuleZFSException
 179          * @access private
 180          */
 181         private function exec($cmd, &$out = null, &$res = null) {
 182                 $tmp = OMVUtil::exec($cmd, $out, $res);
 183                 if ($res) {
 184                         throw new OMVModuleZFSException(implode("\n", $out));
 185                 }
 186                 return $tmp;
 187         }
 188 }
 189
 190 ?>