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core: do not undefine libvirt domain when not necessary

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Libvirt will replace domain XML when trying to define the new one with
the same name and UUID - this is exactly what we need. This fixes race
condition with other processes (especially Qubes Manager), which can try
to access that libvirt domain object at the same time.
This commit is contained in:
Marek Marczykowski-Górecki 2015-03-29 16:21:33 +02:00
parent 1b428f6865
commit 124a26ec97
1 changed files with 0 additions and 3 deletions
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3
core-modules/000QubesVm.py
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@ -562,7 +562,6 @@ class QubesVm(object):
self.pre_rename(name)
if self.libvirt_domain:
self.libvirt_domain.undefine()
self._libvirt_domain = None
if self._qdb_connection:
self._qdb_connection.close()
self._qdb_connection = None
@ -672,8 +671,6 @@ class QubesVm(object):
def _update_libvirt_domain(self):
domain_config = self.create_config_file()
if self._libvirt_domain:
self._libvirt_domain.undefine()
try:
self._libvirt_domain = vmm.libvirt_conn.defineXML(domain_config)
self.uuid = uuid.UUID(bytes=self._libvirt_domain.UUID())