Add MultipathDevice.getDMNode(), because .updateSysfsPath() needs it.

This should have been part of the previous commit but wasn't.

1 files changed, 8 insertions, 0 deletions

diff --git a/storage/devices.py b/storage/devices.py
index 2af2dc70a..577b0e9b4 100644
--- a/storage/devices.py
+++ b/storage/devices.py
@@ -2820,6 +2820,14 @@ class MultipathDevice(DiskDevice):
         else:
             self.sysfsPath = ''
 
+    def getDMNode(self):
+        """ Return the dm-X (eg: dm-0) device node for this device. """
+        log_method_call(self, self.name, status=self.status)
+        if not self.exists:
+            raise DeviceError("device has not been created", self.name)
+
+        return dm.dm_node_from_name(self.name)
+
 class NoDevice(StorageDevice):
     """ A nodev device for nodev filesystems like tmpfs. """
     _type = "nodev"