Ondrej Kozina 614f671b92 Introduce SUBDEV internal device type. ...

LUKS2 and other device types allow stacking of dm devices
underneath public top level device.

The new type identifies clearly those private devices in respective
device stack so that they can be easily removed while removing
top level public device.

Switch LUKS2 reencryption device stack to use SUBDEV type immmediately
for hotzone and overlay devices. Other devices will follow in later
releases.

2019-06-27 10:19:01 +02:00

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