Re: [libvirt RFC 19/24] qemu_snapshot: refactor validation of snapshot delete

Prepare the validation function for external snapshot delete support. There is one exception when deleting `children-only` snapshots. If the snapshot tree is like this example: snap1 (external) | +- snap2 (internal) | +- snap3 (internal) | +- snap4 (internal) and user calls `snapshot-delete snap1 --children-only` the current snapshot is external but all the children snapshots are internal only and we are able to delete it. Signed-off-by: Pavel Hrdina <phrdina(a)redhat.com&gt; --- src/qemu/qemu_snapshot.c | 72 +++++++++++++++++++++++++--------------- 1 file changed, 45 insertions(+), 27 deletions(-)