That module is actually already in Linux in the form of dm-integrity: https://github.com/torvalds/linux/blob/master/Documentation/device-mapper/dm-integrity.txt

That module is actually already in Linux in the form of dm-integrity: https://github.com/torvalds/linux/blob/master/Documentation/device-mapper/dm-integrity.txt https://github.com/torvalds/linux/blob/master/Documentation/... I'm using it with mdadm right now and it works pretty okay.