v4.19.13 snapshot.
diff --git a/fs/lockd/netns.h b/fs/lockd/netns.h
new file mode 100644
index 0000000..5bec78c
--- /dev/null
+++ b/fs/lockd/netns.h
@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __LOCKD_NETNS_H__
+#define __LOCKD_NETNS_H__
+
+#include <linux/fs.h>
+#include <net/netns/generic.h>
+
+struct lockd_net {
+ unsigned int nlmsvc_users;
+ unsigned long next_gc;
+ unsigned long nrhosts;
+
+ struct delayed_work grace_period_end;
+ struct lock_manager lockd_manager;
+
+ struct list_head nsm_handles;
+};
+
+extern unsigned int lockd_net_id;
+
+#endif