[Xen-devel] [PATCH] Prevent xend from starting duplicate domains

[Dan Smith <danms@xxxxxxxxxx>]

The attached patch puts a simple check in domain_create() which
prevents starting a domain if there is already one of the same name in
the domain list.

This fixes the problem of getting the following error message from xm
while creating a domain soon after destroying one with the same name:

  xen.xend.XendProtocol.XendError: (3, 'No such process')

Signed-off-by: Dan Smith <danms@xxxxxxxxxx>

diff -r 3a34bcb7c28b tools/python/xen/xend/XendDomain.py
--- a/tools/python/xen/xend/XendDomain.py       Tue Sep 13 19:09:44 2005
+++ b/tools/python/xen/xend/XendDomain.py       Tue Sep 13 13:25:08 2005
@@ -296,6 +296,13 @@
         @param config: configuration
         @return: domain
         """
+
+        existing = self.domains.get_by_name(sxp.child_value(config, "name"))
+        if existing:
+            log.debug("Attempt to create duplicate domain %s" % existing.name)
+            raise XendError("Domain %s already exists as %i!" %
+                            (existing.name, existing.id))
+        
         dominfo = XendDomainInfo.create(self.dbmap, config)
         return dominfo
 

-- 
Dan Smith
IBM Linux Technology Center
Open Hypervisor Team
email: danms@xxxxxxxxxx

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