utils_disk: move new_disk_vol_name() to utils_disk

reorganise disk related method to utils_disk.

Signed-off-by: Balamuruhan S <[email protected]>

virttest/utils_disk.py

@@ -24,6 +24,7 @@
 
 from virttest import error_context
 from virttest import utils_numeric
+from virttest.libvirt_xml import pool_xml
 from virttest.compat_52lts import decode_to_text
 from virttest.compat_52lts import results_stdout_52lts
 
@@ -835,6 +836,25 @@ def get_disk_by_serial(serial_str, session=None):
             return disk
 
 
+def new_disk_vol_name(pool_name):
+    """
+    According to BZ#1138523, the new volume name must be the next
+    created partition(sdb1, etc.), so we need to inspect the original
+    partitions of the disk then count the new partition number.
+
+    :param pool_name: Disk pool name
+    :return: New volume name or none
+    """
+    poolxml = pool_xml.PoolXML.new_from_dumpxml(pool_name)
+    if poolxml.get_type(pool_name) != "disk":
+        logging.error("This is not a disk pool")
+        return None
+    disk = poolxml.get_source().device_path[5:]
+    part_num = len(list(filter(lambda s: s.startswith(disk),
+                               get_parts_list())))
+    return disk + str(part_num)
+
+
 class Disk(object):
 
     """

virttest/utils_test/libvirt.py

@@ -3287,25 +3287,6 @@ def exec_virsh_edit(source, edit_cmd, connect_uri="qemu:///system"):
         return False
 
 
-def new_disk_vol_name(pool_name):
-    """
-    According to BZ#1138523, the new volume name must be the next
-    created partition(sdb1, etc.), so we need to inspect the original
-    partitions of the disk then count the new partition number.
-
-    :param pool_name: Disk pool name
-    :return: New volume name or none
-    """
-    poolxml = pool_xml.PoolXML.new_from_dumpxml(pool_name)
-    if poolxml.get_type(pool_name) != "disk":
-        logging.error("This is not a disk pool")
-        return None
-    disk = poolxml.get_source().device_path[5:]
-    part_num = len(list(filter(lambda s: s.startswith(disk),
-                               utils_misc.utils_disk.get_parts_list())))
-    return disk + str(part_num)
-
-
 def update_polkit_rule(params, pattern, new_value):
     """
     This function help to update the rule during testing.