2 dnl # User namespaces, use kuid_t in place of uid_t
3 dnl # where available. Not strictly a user namespaces thing
4 dnl # but it should prevent surprises
6 AC_DEFUN([ZFS_AC_KERNEL_KUIDGID_T], [
7 AC_MSG_CHECKING([whether kuid_t/kgid_t is available])
8 ZFS_LINUX_TRY_COMPILE([
9 #include <linux/uidgid.h>
11 kuid_t userid __attribute__ ((unused)) = KUIDT_INIT(0);
12 kgid_t groupid __attribute__ ((unused)) = KGIDT_INIT(0);
14 ZFS_LINUX_TRY_COMPILE([
15 #include <linux/uidgid.h>
17 kuid_t userid __attribute__ ((unused)) = 0;
18 kgid_t groupid __attribute__ ((unused)) = 0;
20 AC_MSG_RESULT(yes; optional)
22 AC_MSG_RESULT(yes; mandatory)
23 AC_DEFINE(HAVE_KUIDGID_T, 1, [kuid_t/kgid_t in use])