mirror_zfs/config/kernel-group-info.m4
Damian Szuberski 2f31b585e7
Strengthen Linux kernel capabilities detection
- Add `CONFIG_BLOCK` Linux config requirement to
  `ZFS_AC_KERNEL_CONFIG_DEFINED`. OpenZFS won't compile without
  that block device support due to large amount of functional
  dependencies on it.

- Remove dependency on `groups_alloc()` in
  `ZFS_AC_KERNEL_SRC_GROUP_INFO_GID` to circumvent the missing stub
  in Linux 4.X kernel headers.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: szubersk <szuberskidamian@gmail.com>
Closes #13351
2022-04-21 09:37:11 -07:00

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dnl #
dnl # 4.9 API change
dnl # group_info changed from 2d array via >blocks to 1d array via ->gid
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_GROUP_INFO_GID], [
ZFS_LINUX_TEST_SRC([group_info_gid], [
#include <linux/cred.h>
],[
struct group_info gi __attribute__ ((unused)) = {};
gi.gid[0] = KGIDT_INIT(0);
])
])
AC_DEFUN([ZFS_AC_KERNEL_GROUP_INFO_GID], [
AC_MSG_CHECKING([whether group_info->gid exists])
ZFS_LINUX_TEST_RESULT([group_info_gid], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_GROUP_INFO_GID, 1, [group_info->gid exists])
],[
AC_MSG_RESULT(no)
])
])