/usr/aarch64-linux-gnu/include/bits/ustat.h is in libc6-dev-arm64-cross 2.24-10cross1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30  | /* Copyright (C) 1997-2016 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.
   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.
   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */
#ifndef _SYS_USTAT_H
# error "Never include <bits/ustat.h> directly; use <sys/ustat.h> instead."
#endif
#include <sys/types.h>
struct ustat
  {
    __daddr_t f_tfree;		/* Number of free blocks.  */
    __ino_t f_tinode;		/* Number of free inodes.  */
    char f_fname[6];
    char f_fpack[6];
  };
 |