[Xen-devel] XendConfig to_sxp optional domain

[Alexey Tumanov <atumanov@xxxxxxxxx>]

Hi,

I think I came across a tiny bug (please confirm) in to_sxp method of
XendConfig class (tools/python/xen/xend/XendConfig.py):
   def to_sxp(self, domain = None, ignore_devices = False, ignore = [],
              legacy_only = True):
the domain is optional, but the code tries to access its methods in
several places.  I was just wondering whether there's a strong
assumption that domain should be specified, or the extra checks really
are necessary.

Here's a patch.
Thanks,
Alex.

--- a/tools/python/xen/xend/XendConfig.py       Mon May 11 13:52:04 2009 +0100
+++ b/tools/python/xen/xend/XendConfig.py       Wed May 13 17:23:17 2009 -0400
@@ -1035,7 +1035,7 @@ class XendConfig(dict):
        # TODO: domid/dom is the same thing but called differently
        #       depending if it is from xenstore or sxpr.

-        if domain.getDomid() is not None:
+        if domain and domain.getDomid() != None:
            sxpr.append(['domid', domain.getDomid()])

        if not legacy_only:
@@ -1072,12 +1072,13 @@ class XendConfig(dict):
            sxpr.append(['security_label', self['security_label']])

        sxpr.append(['image', self.image_sxpr()])
-        sxpr.append(['status', domain._stateGet()])
-
-        if domain.getDomid() is not None:
-            sxpr.append(['state', self._get_old_state_string()])

        if domain:
+            sxpr.append(['status', domain._stateGet()])
+
+            if domain.getDomid() is not None:
+                sxpr.append(['state', self._get_old_state_string()])
+
            if domain.store_mfn:
                sxpr.append(['store_mfn', domain.store_mfn])
            if domain.console_mfn:

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