[PATCH 6 of 9] tools/xend: move assert to exception block

[Olaf Hering <olaf@aepfle.de>]

# HG changeset patch
# User Olaf Hering <olaf@aepfle.de>
# Date 1364481362 -3600
# Node ID 586d440c496f2f873bb2bd702032d6cc37ffdf54
# Parent  9ad7bb166540392657f049441c88ae727e1526b9
tools/xend: move assert to exception block

The two assert in restore trigger sometimes after hundreds of
migrations. If they trigger the destination host will not destroy the
newly created, still empty guest. After a second migration attempt to
this host there will be two guets with the same name and uuid. This
situation is poorly handled by the xm tools.
With this change the guest will be destroyed.

Signed-off-by: Olaf Hering <olaf@aepfle.de>

diff -r 9ad7bb166540 -r 586d440c496f tools/python/xen/xend/XendCheckpoint.py
--- a/tools/python/xen/xend/XendCheckpoint.py
+++ b/tools/python/xen/xend/XendCheckpoint.py
@@ -262,9 +262,6 @@ def restore(xd, fd, dominfo = None, paus
     store_port   = dominfo.getStorePort()
     console_port = dominfo.getConsolePort()
 
-    assert store_port
-    assert console_port
-
     # if hvm, pass mem size to calculate the store_mfn
     if is_hvm:
         apic = int(dominfo.info['platform'].get('apic', 0))
@@ -276,6 +273,9 @@ def restore(xd, fd, dominfo = None, paus
         pae  = 0
 
     try:
+        assert store_port
+        assert console_port
+
         restore_image = image.create(dominfo, dominfo.info)
         memory = restore_image.getRequiredAvailableMemory(
             dominfo.info['memory_dynamic_max'] / 1024)