diff -drupN a/include/linux/device-mapper.h b/include/linux/device-mapper.h
--- a/include/linux/device-mapper.h	2018-08-06 17:23:04.000000000 +0300
+++ b/include/linux/device-mapper.h	2022-06-12 05:28:14.000000000 +0300
@@ -408,6 +408,12 @@ void dm_set_mdptr(struct mapped_device *
 void *dm_get_mdptr(struct mapped_device *md);
 
 /*
+ * Export the device via the ioctl interface (uses mdptr).
+ */
+int dm_ioctl_export(struct mapped_device *md, const char *name,
+		    const char *uuid);
+
+/*
  * A device can still be used while suspended, but I/O is deferred.
  */
 int dm_suspend(struct mapped_device *md, unsigned suspend_flags);
@@ -434,6 +440,13 @@ union map_info *dm_get_rq_mapinfo(struct
 
 struct queue_limits *dm_get_queue_limits(struct mapped_device *md);
 
+void dm_lock_md_type(struct mapped_device *md);
+void dm_unlock_md_type(struct mapped_device *md);
+void dm_set_md_type(struct mapped_device *md, unsigned type);
+unsigned dm_get_md_type(struct mapped_device *md);
+int dm_setup_md_queue(struct mapped_device *md, struct dm_table *t);
+unsigned dm_table_get_type(struct dm_table *t);
+
 /*
  * Geometry functions.
  */