* gnu/services/base.scm (device-mapping-service-type) (device-mapping-service): Move to... * gnu/system/mapped-devices.scm (device-mapping-service-type): (device-mapping-service): ... here. New variables.
* gnu/system.scm (open-luks-device, close-luks-device) (luks-device-mapping): Move to... * gnu/system/mapped-devices.scm: ... here. New file.
* gnu/system/file-systems.scm (<mapped-device>, <mapped-device-type>): Move to... * gnu/system/mapped-devices.scm: ... here. New file. * gnu/system.scm, gnu/services/base.scm, gnu/system/linux-initrd.scm: Use it. * gnu-system.am (GNU_SYSTEM_MODULES): Add it. * gnu.scm (%public-modules): Add it.