File targetcli-fb-rbd.patch of Package targetcli

Patche backported to SLE12 targetcli, obtained from:
http://permalink.gmane.org/gmane.comp.file-systems.ceph.devel/26263
Index: targetcli-2.1/targetcli/ui_backstore.py
===================================================================
--- targetcli-2.1.orig/targetcli/ui_backstore.py
+++ targetcli-2.1/targetcli/ui_backstore.py
@@ -21,8 +21,10 @@ from ui_node import UINode, UIRTSLibNode
 from rtslib import RTSRoot
 from rtslib import FileIOBackstore, IBlockBackstore
 from rtslib import PSCSIBackstore, RDMCPBackstore
+from rtslib import RBDBackstore
 from rtslib import FileIOStorageObject, IBlockStorageObject
 from rtslib import PSCSIStorageObject, RDMCPStorageObject
+from rtslib import RBDStorageObject
 from rtslib.utils import get_block_type, is_disk_partition
 from rtslib.utils import convert_human_to_bytes, convert_bytes_to_human
 from configshell import ExecutionError
@@ -56,6 +58,7 @@ class UIBackstores(UINode):
         UIRDMCPBackstore(self)
         UIFileIOBackstore(self)
         UIIBlockBackstore(self)
+        UIRBDBackstore(self)
 
 class UIBackstore(UINode):
     '''
@@ -397,6 +400,34 @@ class UIIBlockBackstore(UIBackstore):
                             % (name, dev))
         return self.new_node(ui_so)
 
+class UIRBDBackstore(UIBackstore):
+    '''
+    RBD backstore UI.
+    '''
+    def __init__(self, parent):
+        UIBackstore.__init__(self, 'rbd', parent)
+
+    def ui_command_create(self, name, dev, readonly=None):
+        '''
+        Creates an RBD Storage object. I{dev} is the path to the RBD
+        block device to use.
+        '''
+        self.assert_root()
+
+        readonly = self.ui_eval_param(readonly, 'bool', False)
+
+        backstore = RBDBackstore(self.next_hba_index(), mode='any')
+        try:
+            so = RBDStorageObject(backstore, name, dev, readonly=readonly)
+        except Exception, exception:
+            backstore.delete()
+            raise exception
+
+        ui_so = UIStorageObject(so, self)
+        self.shell.log.info("Created RBD storage object %s using %s."
+                            % (name, dev))
+        return self.new_node(ui_so)
+
 
 class UIStorageObject(UIRTSLibNode):
     '''