From 9b9aa8ef371e9de4e5141de16edb38e687a496eb Mon Sep 17 00:00:00 2001
From: "mjw@wray-m-3.hpl.hp.com" <mjw@wray-m-3.hpl.hp.com>
Date: Mon, 9 Aug 2004 15:48:32 +0000
Subject: [PATCH] bitkeeper revision 1.1159.6.5
 (41179cd0aGJI1_zvJCg05dqagSOrlw)

Fix problem with wrong domain name in vifctl down.
Add generic support to XendRoot to solve recursive
mutual import problem.
---
 tools/python/xen/xend/XendDomain.py     |  5 ++---
 tools/python/xen/xend/XendDomainInfo.py |  4 +++-
 tools/python/xen/xend/XendRoot.py       | 26 +++++++++++++++++++++++++
 tools/python/xen/xend/server/netif.py   | 11 +++++++++--
 4 files changed, 40 insertions(+), 6 deletions(-)

diff --git a/tools/python/xen/xend/XendDomain.py b/tools/python/xen/xend/XendDomain.py
index 2b8c9671f4..72fa81f56c 100644
--- a/tools/python/xen/xend/XendDomain.py
+++ b/tools/python/xen/xend/XendDomain.py
@@ -53,9 +53,8 @@ class XendDomain:
         # Hack alert. Python does not support mutual imports, but XendDomainInfo
         # needs access to the XendDomain instance to look up domains. Attempting
         # to import XendDomain from XendDomainInfo causes unbounded recursion.
-        # So we stuff the XendDomain instance (self) into XendDomainInfo's
-        # namespace as 'xd'.
-        XendDomainInfo.xd = self
+        # So we stuff the XendDomain instance (self) into xroot's components.
+        xroot.add_component("xen.xend.XendDomain", self)
         # Table of domain info indexed by domain id.
         self.db = XendDB.XendDB(self.dbpath)
         self.domain_db = self.db.fetchall("")
diff --git a/tools/python/xen/xend/XendDomainInfo.py b/tools/python/xen/xend/XendDomainInfo.py
index fa5fd6b574..dee5c1cdb2 100644
--- a/tools/python/xen/xend/XendDomainInfo.py
+++ b/tools/python/xen/xend/XendDomainInfo.py
@@ -27,6 +27,7 @@ import sxp
 import XendConsole
 xendConsole = XendConsole.instance()
 from XendLogging import log
+from XendRoot import get_component
 
 import server.SrvDaemon
 xend = server.SrvDaemon.instance()
@@ -460,7 +461,8 @@ class XendDomainInfo:
             if c in '_-.': continue
             if c in string.ascii_letters: continue
             raise VmError('invalid vm name')
-        # See comment in XendDomain constructor about 'xd'.
+        # See comment in XendDomain constructor.
+        xd = get_component('xen.xend.XendDomain')
         if xd.domain_exists(name):
             raise VmError('vm name clash: ' + name)
         
diff --git a/tools/python/xen/xend/XendRoot.py b/tools/python/xen/xend/XendRoot.py
index 3a6392803c..9f23d1c686 100644
--- a/tools/python/xen/xend/XendRoot.py
+++ b/tools/python/xen/xend/XendRoot.py
@@ -50,6 +50,8 @@ class XendRoot:
 
     loglevel_default = 'DEBUG'
 
+    components = {}
+
     def __init__(self):
         self.rebooted = 0
         self.last_reboot = None
@@ -62,6 +64,24 @@ class XendRoot:
         #eserver.subscribe('xend.domain.created', self.event_handler)
         #eserver.subscribe('xend.domain.died', self.event_handler)
 
+    def add_component(self, name, val):
+        """Add a xend component.
+
+        @param name: component name
+        @param val:  component object
+        """
+        self.components[name] = val
+
+    def get_component(self, name):
+        """Get a xend component from its name.
+        This is used as a work-round for problems caused by mutually
+        recursive imports.
+
+        @param name: component name
+        @return: component object (or None)
+        """
+        return self.components.get(name)
+
     def start(self):
         eserver.inject('xend.start', self.rebooted)
 
@@ -202,3 +222,9 @@ def instance():
 
 def logger():
     return instance().get_logger()
+
+def add_component(name, val):
+    return instance().add_component(name, val)
+
+def get_component(name):
+    return instance().get_component(name)
diff --git a/tools/python/xen/xend/server/netif.py b/tools/python/xen/xend/server/netif.py
index 41be86ac99..9160189120 100755
--- a/tools/python/xen/xend/server/netif.py
+++ b/tools/python/xen/xend/server/netif.py
@@ -10,6 +10,7 @@ from xen.xend import Vifctl
 from xen.xend.XendError import XendError
 from xen.xend.XendLogging import log
 from xen.xend import XendVnet
+from xen.xend.XendRoot import get_component
 
 import channel
 import controller
@@ -168,8 +169,14 @@ class NetDev(controller.Dev):
 
     def vifctl_params(self, vmname=None):
         dom = self.controller.dom
-        name = vmname or ('DOM%d' % dom)
-        return { 'domain': name,
+        if vmname is None:
+            xd = get_component('xen.xend.XendDomain')
+            try:
+                vm = xd.domain_lookup(dom)
+                vmname = vm.name
+            except:
+                vmname = 'DOM%d' % dom
+        return { 'domain': vmname,
                  'vif'   : self.get_vifname(), 
                  'mac'   : self.get_mac(),
                  'bridge': self.bridge,
-- 
2.30.2