config/kernel-security-inode-init.m4

   1 dnl #
   2 dnl # 2.6.39 API change
   3 dnl # The security_inode_init_security() function now takes an additional
   4 dnl # qstr argument which must be passed in from the dentry if available.
   5 dnl # Passing a NULL is safe when no qstr is available the relevant
   6 dnl # security checks will just be skipped.
   7 dnl #
   8 AC_DEFUN([ZFS_AC_KERNEL_6ARGS_SECURITY_INODE_INIT_SECURITY], [
   9         AC_MSG_CHECKING([whether security_inode_init_security wants 6 args])
  10         tmp_flags="$EXTRA_KCFLAGS"
  11         EXTRA_KCFLAGS="-Werror"
  12         ZFS_LINUX_TRY_COMPILE([
  13                 #include <linux/security.h>
  14         ],[
  15                 struct inode *ip __attribute__ ((unused)) = NULL;
  16                 struct inode *dip __attribute__ ((unused)) = NULL;
  17                 const struct qstr *str __attribute__ ((unused)) = NULL;
  18                 char *name __attribute__ ((unused)) = NULL;
  19                 void *value __attribute__ ((unused)) = NULL;
  20                 size_t len __attribute__ ((unused)) = 0;
  21
  22                 security_inode_init_security(ip, dip, str, &name, &value, &len);
  23         ],[
  24                 AC_MSG_RESULT(yes)
  25                 AC_DEFINE(HAVE_6ARGS_SECURITY_INODE_INIT_SECURITY, 1,
  26                           [security_inode_init_security wants 6 args])
  27         ],[
  28                 AC_MSG_RESULT(no)
  29         ])
  30         EXTRA_KCFLAGS="$tmp_flags"
  31 ])
  32
  33 dnl #
  34 dnl # 3.2 API change
  35 dnl # The security_inode_init_security() API has been changed to include
  36 dnl # a filesystem specific callback to write security extended attributes.
  37 dnl # This was done to support the initialization of multiple LSM xattrs
  38 dnl # and the EVM xattr.
  39 dnl #
  40 AC_DEFUN([ZFS_AC_KERNEL_CALLBACK_SECURITY_INODE_INIT_SECURITY], [
  41         AC_MSG_CHECKING([whether security_inode_init_security wants callback])
  42         tmp_flags="$EXTRA_KCFLAGS"
  43         EXTRA_KCFLAGS="-Werror"
  44         ZFS_LINUX_TRY_COMPILE([
  45                 #include <linux/security.h>
  46         ],[
  47                 struct inode *ip __attribute__ ((unused)) = NULL;
  48                 struct inode *dip __attribute__ ((unused)) = NULL;
  49                 const struct qstr *str __attribute__ ((unused)) = NULL;
  50                 initxattrs func __attribute__ ((unused)) = NULL;
  51
  52                 security_inode_init_security(ip, dip, str, func, NULL);
  53         ],[
  54                 AC_MSG_RESULT(yes)
  55                 AC_DEFINE(HAVE_CALLBACK_SECURITY_INODE_INIT_SECURITY, 1,
  56                           [security_inode_init_security wants callback])
  57         ],[
  58                 AC_MSG_RESULT(no)
  59         ])
  60         EXTRA_KCFLAGS="$tmp_flags"
  61 ])