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4e797f1af9
When the block copy operation is started with a reused external file in incremental mode libvirt will need to open and insert the backing chain for that file into qemu (in -blockdev mode). This means that we'll need to track the backing chain and metadata such as node names for the full chain of <mirror>. This patch invokes the full backing chain formatter and parser for <mirror> so that the chain can be kept with <mirror>. Signed-off-by: Peter Krempa <pkrempa@redhat.com> Reviewed-by: Ján Tomko <jtomko@redhat.com>