qemu: Allow NVMe disk in CGroups
If a domain has an NVMe disk configured, then we need to allow it on devices CGroup so that qemu can access it. There is one caveat though - if an NVMe disk is read only we need CGroup to allow write too. This is because when opening the device, qemu does couple of ioctl()-s which are considered as write. Signed-off-by: NMichal Privoznik <mprivozn@redhat.com> Reviewed-by: NCole Robinson <crobinso@redhat.com>
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