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Fix export locking

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If qubesd has restarted then _export_lock will be None
This commit is contained in:
Demi Marie Obenour 2020-11-25 15:08:13 -05:00
parent e53d040051
commit ec51673f21
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GPG Key ID: 28A45C93B0B5B6E0
1 changed files with 13 additions and 13 deletions
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26
qubes/storage/file.py
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@ -183,7 +183,7 @@ class FileVolume(qubes.storage.Volume):
self.dir_path = dir_path
assert self.dir_path, "dir_path not specified"
self._revisions_to_keep = 0
self._locked = None
self._export_lock = None
super().__init__(**kwargs)
if self.snap_on_start:
@ -268,17 +268,17 @@ class FileVolume(qubes.storage.Volume):
return self
def export(self):
if self._locked is not None:
assert self._locked is FileVolume._marker_running, \
if self._export_lock is not None:
assert self._export_lock is FileVolume._marker_running, \
'nested calls to export()'
self._not_implemented('exporting a dirty volume')
self._locked = FileVolume._marker_exported
self._export_lock = FileVolume._marker_exported
return self.path
def export_end(self, path):
assert self._locked is FileVolume._marker_exported, \
'cannot end an export that never began'
self._locked = None
assert self._export_lock is not FileVolume._marker_running, \
'ending an export on a running volume?'
self._export_lock = None
@asyncio.coroutine
def import_volume(self, src_volume):
@ -322,13 +322,13 @@ class FileVolume(qubes.storage.Volume):
return self
def start(self):
if self._locked is not None:
assert self._locked is FileVolume._marker_exported, \
if self._export_lock is not None:
assert self._export_lock is FileVolume._marker_exported, \
'nested calls to start()'
self._not_implemented('starting a VM with an exported volume')
if self.is_dirty():
self._not_implemented('exporting a dirty volume')
self._locked = FileVolume._marker_running
self._export_lock = FileVolume._marker_running
if not self.save_on_stop and not self.snap_on_start:
self.reset()
else:
@ -346,15 +346,15 @@ class FileVolume(qubes.storage.Volume):
return self
def stop(self):
assert self._locked is FileVolume._marker_running, \
'cannot stop a volume that has not been started'
assert self._export_lock is not FileVolume._marker_exported, \
'trying to stop exported file volume?'
if self.save_on_stop:
self.commit()
elif self.snap_on_start:
_remove_if_exists(self.path_cow)
else:
_remove_if_exists(self.path)
self._locked = None
self._export_lock = None
return self
@property