sysdeps/unix/sysv/linux/tst-mount-consts.py

   1 #!/usr/bin/python3
   2 # Test that glibc's sys/mount.h constants match the kernel's.
   3 # Copyright (C) 2022-2023 Free Software Foundation, Inc.
   4 # This file is part of the GNU C Library.
   5 #
   6 # The GNU C Library is free software; you can redistribute it and/or
   7 # modify it under the terms of the GNU Lesser General Public
   8 # License as published by the Free Software Foundation; either
   9 # version 2.1 of the License, or (at your option) any later version.
  10 #
  11 # The GNU C Library is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 # Lesser General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU Lesser General Public
  17 # License along with the GNU C Library; if not, see
  18 # <https://www.gnu.org/licenses/>.
  19
  20 import argparse
  21 import sys
  22
  23 import glibcextract
  24 import glibcsyscalls
  25
  26
  27 def main():
  28     """The main entry point."""
  29     parser = argparse.ArgumentParser(
  30         description="Test that glibc's sys/mount.h constants "
  31         "match the kernel's.")
  32     parser.add_argument('--cc', metavar='CC',
  33                         help='C compiler (including options) to use')
  34     args = parser.parse_args()
  35
  36     if glibcextract.compile_c_snippet(
  37             '#include <linux/mount.h>',
  38             args.cc).returncode != 0:
  39         sys.exit (77)
  40
  41     linux_version_headers = glibcsyscalls.linux_kernel_version(args.cc)
  42     # Constants in glibc were updated to match Linux v6.3.  When glibc
  43     # constants are updated this value should be updated to match the
  44     # released kernel version from which the constants were taken.
  45     linux_version_glibc = (6, 3)
  46     def check(cte, exclude=None):
  47         return glibcextract.compare_macro_consts(
  48                 '#include <sys/mount.h>\n',
  49                 '#include <asm/fcntl.h>\n'
  50                 '#include <linux/mount.h>\n',
  51                 args.cc,
  52                 cte,
  53                 exclude,
  54                 linux_version_glibc > linux_version_headers,
  55                 linux_version_headers > linux_version_glibc)
  56
  57     # Skip testing FS_CONFIG commands since they are only enums in the kernel
  58     # header.
  59     status = max(
  60         check('FSOPEN_.*'),
  61         check('FSMOUNT_.*'),
  62         # MOVE_MOUNT__MASK may vary depending of the kernel version.
  63         check('MOVE_MOUNT_.*', 'MOVE_MOUNT__MASK'),
  64         check('OPEN_TREE_*'),
  65         # MOUNT_ATTR_SIZE_VER0 is used for mount_setattr.
  66         check('MOUNT_ATTR_.*', 'MOUNT_ATTR_SIZE_VER0'))
  67     sys.exit(status)
  68
  69 if __name__ == '__main__':
  70     main()