VOID
LfsFlushToLsn(
  IN  LFS_LOG_HANDLE LogHandle,
  IN  LSN Lsn
  );

Routine Description:

    This routine is called by a client to insure that all log records
    to a certain point have been flushed to the file.  This is done by
    checking if the desired Lsn has even been written at all.  If so we
    check if it has been flushed to the file.  If not, we simply write
    the current restart area to the disk.

Arguments:

    LogHandle - Pointer to private Lfs structure used to identify this
                client.

    Lsn - This is the Lsn that must be on the disk on return from this
          routine.

Return Value:

    None