{
  "node-name": "#block126",
  "read-only": false,
  "driver": "qcow2",
  "file": "#block004",
  "backing": "#block313"
}
{
  "driver": "file",
  "filename": "/var/lib/libvirt/images/rhel7.3.1507297895",
  "node-name": "#block004",
  "auto-read-only": true,
  "discard": "unmap"
}
{
  "node-name": "#block313",
  "read-only": true,
  "driver": "qcow2",
  "file": "#block256"
}
{
  "driver": "file",
  "filename": "/var/lib/libvirt/images/rhel7.3.1484071872",
  "node-name": "#block256",
  "auto-read-only": true,
  "discard": "unmap"
}
