On Tue, Jul 10, 2018 at 10:44:42AM +0200, Peter Krempa wrote:
The sectors read from the backing image need to be written to the top level image. If a disk is marked read-only the image can't be written. QEMU handled that by disabling copy_on_read and reporting a warning: -drive file=/var/lib/libvirt/images/c,format=qcow2,if=none, id=drive-scsi0-0-1,readonly=on,copy-on-read=on: warning: disabling copy-on-read on read-only drive Signed-off-by: Peter Krempa <pkrempa@xxxxxxxxxx> --- src/qemu/qemu_domain.c | 7 +++++++ 1 file changed, 7 insertions(+)
Reviewed-by: Ján Tomko <jtomko@xxxxxxxxxx> Jano
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