From 1bc7e525a2fe5d0c8e4521cd53db2e371dd15f67 Mon Sep 17 00:00:00 2001
From: James Lee <james@codeconstruct.com.au>
Date: Tue, 18 Aug 2026 16:02:34 +0800
Subject: [PATCH] headers: update for compatibility with toolchain headers down
 to 5.15

Found that many distro build toolchains use outdated kernel headers.
Explicitly add linux/if.h to mctp-ops-test.c, and add missing
linux/mctp.h definitions if undefined.

Signed-off-by: James Lee <james@codeconstruct.com.au>
---
 src/mctp.h            | 24 ++++++++++++++++++++++++
 tests/mctp-ops-test.c |  1 +
 2 files changed, 25 insertions(+)

diff --git a/src/mctp.h b/src/mctp.h
index 0641b4c4..c8ab35ee 100644
--- a/src/mctp.h
+++ b/src/mctp.h
@@ -109,4 +109,28 @@ enum {
 #define RTNLGRP_MCTP_IFADDR 34
 #endif
 
+#ifndef SIOCMCTPALLOCTAG
+#define SIOCMCTPALLOCTAG (SIOCPROTOPRIVATE + 0)
+#define SIOCMCTPDROPTAG (SIOCPROTOPRIVATE + 1)
+
+struct mctp_ioc_tag_ctl {
+	mctp_eid_t peer_addr;
+	__u8 tag;
+	__u16 flags;
+};
+#endif
+
+#ifndef SIOCMCTPALLOCTAG2
+#define SIOCMCTPALLOCTAG2 (SIOCPROTOPRIVATE + 2)
+#define SIOCMCTPDROPTAG2 (SIOCPROTOPRIVATE + 3)
+
+struct mctp_ioc_tag_ctl2 {
+	unsigned int net;
+	mctp_eid_t peer_addr;
+	mctp_eid_t local_addr;
+	__u16 flags;
+	__u8 tag;
+};
+#endif
+
 #endif /* _MCTP_H */
diff --git a/tests/mctp-ops-test.c b/tests/mctp-ops-test.c
index 80cff5a2..30353cfa 100644
--- a/tests/mctp-ops-test.c
+++ b/tests/mctp-ops-test.c
@@ -20,6 +20,7 @@
 #include <sys/socket.h>
 #include <sys/un.h>
 
+#include <linux/if.h>
 #include <linux/netlink.h>
 
 #include "mctp-ops.h"