xfs_io/encrypt: support specifying crypto data unit size

[thirdparty/xfsprogs-dev.git] / m4 / package_libcdev.m4

diff --git a/m4/package_libcdev.m4 b/m4/package_libcdev.m4
index f987aa4ab7b5b8de475bc7cc237a915f9cf15902..174070651ecf766355ab2aa7c266250a3fb90dc9 100644 (file)
--- a/m4/package_libcdev.m4
+++ b/m4/package_libcdev.m4
@@ -326,6 +326,27 @@ AC_DEFUN([AC_NEED_INTERNAL_FSCRYPT_ADD_KEY_ARG],
     AC_SUBST(need_internal_fscrypt_add_key_arg)
   ])
 
+#
+# Check if we need to override the system struct fscrypt_policy_v2
+# with the internal definition.  This /only/ happens if the system
+# actually defines struct fscrypt_policy_v2 /and/ the system
+# definition is missing certain fields.
+#
+AC_DEFUN([AC_NEED_INTERNAL_FSCRYPT_POLICY_V2],
+  [
+    AC_CHECK_TYPE(struct fscrypt_policy_v2,
+      [
+        AC_CHECK_MEMBER(struct fscrypt_policy_v2.log2_data_unit_size,
+          ,
+          need_internal_fscrypt_policy_v2=yes,
+          [#include <linux/fs.h>]
+        )
+      ],,
+      [#include <linux/fs.h>]
+    )
+    AC_SUBST(need_internal_fscrypt_policy_v2)
+  ])
+
 #
 # Check if we have a FS_IOC_GETFSMAP ioctl (Linux)
 #