lvm_thin: fill in volume's revisions_to_keep from pool
Otherwise, the base class defaults revisions_to_keep to 0.
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@ -78,6 +78,8 @@ class ThinPool(qubes.storage.Pool):
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''' Initialize a :py:class:`qubes.storage.Volume` from `volume_config`.
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'''
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if 'revisions_to_keep' not in volume_config.keys():
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volume_config['revisions_to_keep'] = self.revisions_to_keep
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if 'vid' not in volume_config.keys():
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if vm and hasattr(vm, 'name'):
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vm_name = vm.name
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