v4.19.13 snapshot.
diff --git a/include/linux/inet_diag.h b/include/linux/inet_diag.h
new file mode 100644
index 0000000..39faaaf
--- /dev/null
+++ b/include/linux/inet_diag.h
@@ -0,0 +1,71 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _INET_DIAG_H_
+#define _INET_DIAG_H_ 1
+
+#include <uapi/linux/inet_diag.h>
+
+struct net;
+struct sock;
+struct inet_hashinfo;
+struct nlattr;
+struct nlmsghdr;
+struct sk_buff;
+struct netlink_callback;
+
+struct inet_diag_handler {
+ void (*dump)(struct sk_buff *skb,
+ struct netlink_callback *cb,
+ const struct inet_diag_req_v2 *r,
+ struct nlattr *bc);
+
+ int (*dump_one)(struct sk_buff *in_skb,
+ const struct nlmsghdr *nlh,
+ const struct inet_diag_req_v2 *req);
+
+ void (*idiag_get_info)(struct sock *sk,
+ struct inet_diag_msg *r,
+ void *info);
+
+ int (*idiag_get_aux)(struct sock *sk,
+ bool net_admin,
+ struct sk_buff *skb);
+
+ size_t (*idiag_get_aux_size)(struct sock *sk,
+ bool net_admin);
+
+ int (*destroy)(struct sk_buff *in_skb,
+ const struct inet_diag_req_v2 *req);
+
+ __u16 idiag_type;
+ __u16 idiag_info_size;
+};
+
+struct inet_connection_sock;
+int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk,
+ struct sk_buff *skb, const struct inet_diag_req_v2 *req,
+ struct user_namespace *user_ns,
+ u32 pid, u32 seq, u16 nlmsg_flags,
+ const struct nlmsghdr *unlh, bool net_admin);
+void inet_diag_dump_icsk(struct inet_hashinfo *h, struct sk_buff *skb,
+ struct netlink_callback *cb,
+ const struct inet_diag_req_v2 *r,
+ struct nlattr *bc);
+int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo,
+ struct sk_buff *in_skb, const struct nlmsghdr *nlh,
+ const struct inet_diag_req_v2 *req);
+
+struct sock *inet_diag_find_one_icsk(struct net *net,
+ struct inet_hashinfo *hashinfo,
+ const struct inet_diag_req_v2 *req);
+
+int inet_diag_bc_sk(const struct nlattr *_bc, struct sock *sk);
+
+void inet_diag_msg_common_fill(struct inet_diag_msg *r, struct sock *sk);
+
+int inet_diag_msg_attrs_fill(struct sock *sk, struct sk_buff *skb,
+ struct inet_diag_msg *r, int ext,
+ struct user_namespace *user_ns, bool net_admin);
+
+extern int inet_diag_register(const struct inet_diag_handler *handler);
+extern void inet_diag_unregister(const struct inet_diag_handler *handler);
+#endif /* _INET_DIAG_H_ */