that is what Samba 4.0.0 will ship with
Autobuild-User(master): Christian Ambach <ambi@samba.org>
Autobuild-Date(master): Mon Sep 10 19:40:01 CEST 2012 on sn-devel-104
/* Leave at 29 - not yet released. Remove sys_acl functions other than set and get - abartlet */
/* Leave at 29 - not yet released. Added backup_intent bool to files_struct - JRA */
/* Leave at 29 - not yet released. Add durable handle functions - metze/obnox */
-#define SMB_VFS_INTERFACE_VERSION 29
+/* Bump to version 30 - Samba 4.0.0 will ship with interface version 30 */
+#define SMB_VFS_INTERFACE_VERSION 30
/*
All intercepted VFS operations must be declared as static functions inside module source