---
__init__.py | 43 +++++++++++++++++++++++++++++++++++++++++++
1 files changed, 43 insertions(+), 0 deletions(-)
diff --git a/__init__.py b/__init__.py
index 523ad74..d1db3da 100644
--- a/__init__.py
+++ b/__init__.py
@@ -241,6 +241,49 @@ def getDmTarget(uuid = None, major = None, minor = None, name = None):
return map.table.type
return None
+def getNameFromDmNode(dm_node):
+ """ Return the related name for the specified node.
+
+ Expects a device node with or without the "/dev" prefix.
+
+ Returns a String representing the name. None if the major, minor
+ pair was not found in the maps list.
+ """
+
+ if not dm_node.startswith("/dev"):
+ import os.path as _path
+ dm_node = _path.join("/dev", dm_node)
+ del _path
+
+ import os as _os
+ stat = _os.stat(dm_node)
+ major = long(_os.major(stat.st_rdev))
+ minor = long(_os.minor(stat.st_rdev))
+ del _os
+
+ for map in dm.maps():
+ if map.dev.major == major and map.dev.minor == minor:
+ return map.name
+
+ # In case the major, minor pair is not found in maps.
+ return None
+
+
+def getDmNodeFromName(name):
+ """ Return the related node for the specified name.
+
+ Expects a string representing the name.
+
+ Returns dm-MINOR if the map list contains the specified name.
+ None if name was not found.
+ """
+ for map in dm.maps():
+ if map.name == name:
+ return "dm-%s" % map.dev.minor
+
+ return None
+
+
__all__ = [ "dm", "dmraid", "BlockDev" ]
#
--
1.6.0.6
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