config/kernel-kuid-helpers.m4

   1 dnl #
   2 dnl # 3.5 API change,
   3 dnl # Since usernamespaces were introduced in kernel version 3.5, it
   4 dnl # became necessary to go through one more level of indirection
   5 dnl # when dealing with uid/gid - namely the kuid type.
   6 dnl #
   7 dnl #
   8 AC_DEFUN([ZFS_AC_KERNEL_KUID_HELPERS], [
   9         AC_MSG_CHECKING([whether i_(uid|gid)_(read|write) exist])
  10         ZFS_LINUX_TRY_COMPILE([
  11                 #include <linux/fs.h>
  12         ],[
  13                 struct inode *ip = NULL;
  14                 (void) i_uid_read(ip);
  15         ],[
  16                 AC_MSG_RESULT(yes)
  17                 AC_DEFINE(HAVE_KUID_HELPERS, 1,
  18                     [i_(uid|gid)_(read|write) exist])
  19         ],[
  20                 AC_MSG_RESULT(no)
  21         ])
  22 ])