Hi Guilhem, I may have found the answer to the question, why there is still no sysfs interface for the ZFS. Kernel object representing the `/sys/fs` directory is exported as GPL only, so it's not possible to use it in non GPL module, which unfortunately ZFS is (CDDL).
Since the ZFS is not strictly speaking alien in Debian (it's in contrib, though), it would be nice if cryptsetup-initramfs would support it. So, any other ideas how to integrate the ZFS support? Cheers Michal