Immutable backing files

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Hi list,
suppose I have an immutable (ie: due to a read-only snapshot) backing file.

After creating an overlay file with "qemu-img create -f qcow2 -o backing_file=/path/to/immutable/file.img current.qcow2", libvirt refuse to start the virtual machine and exits with an error stating "Could not open backing file /path/to/immutable/file.img: Permission denied".

From my understanding, libvirtd is trying to change the owner/permissions/selinux context of the backing file but, being it immutable, fails to start the VM. Is that the expected behavior?

Thanks.

--
Danti Gionatan
Supporto Tecnico
Assyoma S.r.l. - www.assyoma.it
email: g.danti@xxxxxxxxxx - info@xxxxxxxxxx
GPG public key ID: FF5F32A8

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