[Xen-changelog] Added method XendDomain.privilegedDomain and use that inside DevController to

[Xen patchbot -unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User emellor@ewan
# Node ID cc998831741663583b64fc4c05f7d8f610a478aa
# Parent  716a0d177ffa27f3d5c7caf8acfb7b4ff9fd6384
Added method XendDomain.privilegedDomain and use that inside DevController to
avoid hard-coding the domain ID 0.

Signed-off-by: Ewan Mellor <ewan@xxxxxxxxxxxxx>

diff -r 716a0d177ffa -r cc9988317416 tools/python/xen/xend/XendDomain.py
--- a/tools/python/xen/xend/XendDomain.py       Mon Oct  3 22:28:24 2005
+++ b/tools/python/xen/xend/XendDomain.py       Mon Oct  3 23:21:49 2005
@@ -284,6 +284,11 @@
                 pass
         return dominfo
 
+
+    def privilegedDomain(self):
+        return self.domains[PRIV_DOMAIN]
+
+ 
     def domain_unpause(self, id):
         """Unpause domain execution.
 
diff -r 716a0d177ffa -r cc9988317416 
tools/python/xen/xend/server/DevController.py
--- a/tools/python/xen/xend/server/DevController.py     Mon Oct  3 22:28:24 2005
+++ b/tools/python/xen/xend/server/DevController.py     Mon Oct  3 23:21:49 2005
@@ -189,8 +189,17 @@
         """
 
         import xen.xend.XendDomain
-        backdom = xen.xend.XendDomain.instance().domain_lookup_by_name(
-            sxp.child_value(config, 'backend', '0'))
+        xd = xen.xend.XendDomain.instance()
+
+        backdom_name = sxp.child_value(config, 'backend')
+        if backdom_name:
+            backdom = xd.domain_lookup_by_name(backdom_name)
+        else:
+            backdom = xd.privilegedDomain()
+
+        if not backdom:
+            raise VmError("Cannot configure device for unknown backend %s" %
+                          backdom_name)
 
         frontpath = self.frontendPath(devid)
         backpath  = self.backendPath(backdom, devid)

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