aoe-revalidate - revalidate the disk size of an aoe device
command tells the aoe driver to revalidate the disk size of an open aoe device.
Normally the aoe driver will only acknowledge changes in an aoe device's
disk size when the aoe device is not open.
It should be noted that if an aoe device's disk size shrinks in revalidation
any users may become hopelessly confused when their resumed I/O starts to fail.