virsh: add nodedev-update (avocado-framework#4164)

* virsh: add nodedev-update

Add nodedev-update function. This is needed to test the update of a
passed through crypto device on s390x.

Signed-off-by: Sebastian Mitterle <smitterl@redhat.com>

* utils_zcrypt: add string representation

For easier debugging use "card.domain" as the string representation of
an entry in the logs.

Signed-off-by: Sebastian Mitterle <smitterl@redhat.com>

---------

Signed-off-by: Sebastian Mitterle <smitterl@redhat.com>

Author: smitterl

virttest/utils_zcrypt.py

@@ -155,6 +155,12 @@ def __init__(self):
         self.driver = None
         self.sestat = None
 
+    def __str__(self):
+        """
+        string representation of entry
+        """
+        return f"{self._card}.{self._domain}"
+
     @property
     def id(self):
         """

virttest/virsh.py

@@ -4321,6 +4321,23 @@ def nodedev_define(xml_file, **dargs):
     return command(cmd, **dargs)
 
 
+def nodedev_update(nodedev_name, xml_file, options=None, **dargs):
+    """
+    Return cmd result of the device to be update by an XML file
+
+    :param nodedev_name: node device name for update
+    :param xml_file: device XML file
+    :param dargs: standardized virsh function API keywords
+    :return: CmdResult object
+    """
+    cmd = "nodedev-update %s %s" % (nodedev_name, xml_file)
+    if options is not None:
+        cmd += " %s" % options
+
+    LOG.debug("Updated the device from %s", xml_file)
+    return command(cmd, **dargs)
+
+
 def nodedev_create(xml_file, options=None, **dargs):
     """
     Return cmd result of the device to be created by an XML file