[NEW PATCH] BZ#734136 - Stricter partition detection (via gerrit-bot)

New patch submitted by Saggi Mizrahi (smizrahi(a)redhat.com)

You can review this change at: http://gerrit.usersys.redhat.com/866

commit 8a883f5629c356e739ee0690a90f13db71c156a4
Author: Saggi Mizrahi <smizrahi(a)redhat.com&gt;
Date:   Tue Aug 30 11:41:34 2011 +0300

    BZ#734136 - Stricter partition detection
    
    Change-Id: Ibc242c7a3810efbc89083d0f0ea6fb193a63e331

diff --git a/vdsm/storage/devicemapper.py b/vdsm/storage/devicemapper.py
index 08cd533..8000928 100644
--- a/vdsm/storage/devicemapper.py
+++ b/vdsm/storage/devicemapper.py
@@ -29,6 +29,8 @@ from constants import EXT_DMSETUP
 
 DMPATH_FORMAT = "/dev/mapper/%s"
 
+DM_PREFIX_PARTITION = "Part"
+
 def getDmId(deviceMultipathName):
     devlinkPath = DMPATH_FORMAT % deviceMultipathName
     try:
@@ -99,8 +101,18 @@ def isBlockDevice(devName):
         return False
 
 def isPartitioned(devName):
-    devName = resolveDevName(devName)
-    return (len(getHolders(devName)) > 0)
+    dmName = resolveDevName(devName)
+    #Sometimes partitions are not managed by device mapper
+    possiblePartPath = os.path.join("/sys/block/", devName, devName +
"1")
+    if os.path.exists(possiblePartPath):
+            return True
+
+    mpathName = getDevName(dmName)
+    for holder in getHolders(dmName):
+        if getDevName(holder).startswith(mpathName):
+            return True
+
+    return False
 
 def getAllSlaves():
     deps = {}