VOID
LfsFindOldestClientLsn(
  IN  PLFS_RESTART_AREA RestartArea,
  IN  PLFS_CLIENT_RECORD ClientArray,
  OUT PLSN OldestLsn
  );

Routine Description:

    This routine walks through the active clients to determine the oldest
    Lsn the system must maintain.

Arguments:

    RestartArea - This is the Restart Area to examine.

    ClientArray - This is the start of the client data array.

    OldestLsn - We store the oldest Lsn we find in this value.  It is
        initialized with a starting value, we won't return a more recent
        Lsn.

Return Value:

    None.