v4.19.13 snapshot.
diff --git a/include/linux/errqueue.h b/include/linux/errqueue.h
new file mode 100644
index 0000000..be1cf72
--- /dev/null
+++ b/include/linux/errqueue.h
@@ -0,0 +1,28 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _LINUX_ERRQUEUE_H
+#define _LINUX_ERRQUEUE_H 1
+
+
+#include <net/ip.h>
+#if IS_ENABLED(CONFIG_IPV6)
+#include <linux/ipv6.h>
+#endif
+#include <uapi/linux/errqueue.h>
+
+#define SKB_EXT_ERR(skb) ((struct sock_exterr_skb *) ((skb)->cb))
+
+struct sock_exterr_skb {
+ union {
+ struct inet_skb_parm h4;
+#if IS_ENABLED(CONFIG_IPV6)
+ struct inet6_skb_parm h6;
+#endif
+ } header;
+ struct sock_extended_err ee;
+ u16 addr_offset;
+ __be16 port;
+ u8 opt_stats:1,
+ unused:7;
+};
+
+#endif