10 Jul
2018
10 Jul
'18
5:50 p.m.
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@redhat.com> --- src/qemu/qemu_domain.c | 7 +++++++ 1 file changed, 7 insertions(+)
Reviewed-by: Ján Tomko <jtomko@redhat.com> Jano