Ingo Weinhold 2e21fc5436 Generalize use of Vnode::covered_by/covers
* Introduce Vnode flags for covered and covering. Can be used as a quick
  check when one doesn't already hold sVnodeLock.
* Rename resolve_mount_point_to_volume_root() to
  resolve_vnode_to_covering_vnode().
* Adjust all code that deals with transitions between mount points and
  volume root vnodes to generally support covered/covering vnodes.
2011-07-17 16:54:20 +02:00
..
2011-07-17 13:57:30 +00:00