Re: [libvirt] [PATCH 2/2] qemu: backup: roll-back checkpoint metadata if the checkpoint wasn't taken

We insert the checkpoint metadata into the list of checkpoints prior to actually creating the on-disk bits. If the 'transaction' or any other steps done between inserting the checkpoint and creating the on-disk data fail we'd end up with an unusable checkpoint that would vanish after libvirtd restart. Prevent this by rolling back the metadata if we didn't actually take and record the checkpoint. Signed-off-by: Peter Krempa <pkrempa(a)redhat.com&gt; --- src/qemu/qemu_backup.c | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-)