config/kernel-is_owner_or_cap.m4

   1 dnl #
   2 dnl # 2.6.39 API change,
   3 dnl # The is_owner_or_cap() macro was renamed to inode_owner_or_capable(),
   4 dnl # This is used for permission checks in the xattr and file attribute call
   5 dnl # paths.
   6 dnl #
   7 dnl # 5.12 API change,
   8 dnl # inode_owner_or_capable() now takes struct user_namespace *
   9 dnl # to support idmapped mounts
  10 dnl #
  11 AC_DEFUN([ZFS_AC_KERNEL_SRC_INODE_OWNER_OR_CAPABLE], [
  12         ZFS_LINUX_TEST_SRC([inode_owner_or_capable], [
  13                 #include <linux/fs.h>
  14         ],[
  15                 struct inode *ip = NULL;
  16                 (void) inode_owner_or_capable(ip);
  17         ])
  18
  19         ZFS_LINUX_TEST_SRC([inode_owner_or_capable_userns], [
  20                 #include <linux/fs.h>
  21         ],[
  22                 struct inode *ip = NULL;
  23                 (void) inode_owner_or_capable(&init_user_ns, ip);
  24         ])
  25
  26         ZFS_LINUX_TEST_SRC([inode_owner_or_capable_mnt_idmap], [
  27                 #include <linux/fs.h>
  28                 #include <linux/mnt_idmapping.h>
  29         ],[
  30                 struct inode *ip = NULL;
  31                 (void) inode_owner_or_capable(&nop_mnt_idmap, ip);
  32         ])
  33 ])
  34
  35 AC_DEFUN([ZFS_AC_KERNEL_INODE_OWNER_OR_CAPABLE], [
  36         AC_MSG_CHECKING([whether inode_owner_or_capable() exists])
  37         ZFS_LINUX_TEST_RESULT([inode_owner_or_capable], [
  38                 AC_MSG_RESULT(yes)
  39                 AC_DEFINE(HAVE_INODE_OWNER_OR_CAPABLE, 1,
  40                     [inode_owner_or_capable() exists])
  41         ], [
  42                 AC_MSG_RESULT(no)
  43
  44                 AC_MSG_CHECKING(
  45                     [whether inode_owner_or_capable() takes user_ns])
  46                 ZFS_LINUX_TEST_RESULT([inode_owner_or_capable_userns], [
  47                         AC_MSG_RESULT(yes)
  48                         AC_DEFINE(HAVE_INODE_OWNER_OR_CAPABLE_USERNS, 1,
  49                             [inode_owner_or_capable() takes user_ns])
  50                 ],[
  51                         AC_MSG_RESULT(no)
  52                         AC_MSG_CHECKING(
  53                             [whether inode_owner_or_capable() takes mnt_idmap])
  54                         ZFS_LINUX_TEST_RESULT([inode_owner_or_capable_mnt_idmap], [
  55                                 AC_MSG_RESULT(yes)
  56                                 AC_DEFINE(HAVE_INODE_OWNER_OR_CAPABLE_IDMAP, 1,
  57                                     [inode_owner_or_capable() takes mnt_idmap])
  58                         ], [
  59                                 ZFS_LINUX_TEST_ERROR([capability])
  60                         ])
  61                 ])
  62         ])
  63 ])