Goal: 

• Allow to map a virtiofs share in read only mode.

This is the internal equivalent to https://gitlab.com/virtio-fs/virtiofsd/-/issues/97 upstream request.

This request for enhancement (RFE) aims to address the requirement of Openstack (nova) for securely mounting virtiofs shares primarily to facilitate power consumption sharing.

More details in this specification: https://review.opendev.org/c/openstack/nova-specs/+/876707

Expected result:

 
Upon mounting a share on a VM, libvirt has the capability to accept a readonly parameter, thereby restricting any write operations on the mounted share.