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xdp-tools: add patch to fix stddef.h build issue
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Add a patch that avoids including <stddef.h> in BPF headers, fixing
build failures on OpenWrt toolchains where the header is unavailable:

  In file included from xdpfilt_dny_udp.c:10:
  In file included from ./xdpfilt_prog.h:24:
  ../lib/../headers/xdp/parsing_helpers.h:18:10: fatal error: 'stddef.h' file not found
    18 | #include <stddef.h>
        |          ^~~~~~~~~~
  1 error generated.
  make[5]: *** [../lib/common.mk:111: xdpfilt_dny_udp.o] Error 1
  make[4]: *** [Makefile:40: xdp-filter] Error 2

Link: https://github.com/openwrt/openwrt/pull/21972
Signed-off-by: Nick Hainke <vincent@systemli.org>
This commit is contained in:
Nick Hainke 2026-02-10 21:15:15 +01:00
parent f9320e8d2d
commit c752525511
1 changed files with 64 additions and 0 deletions
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64
package/network/utils/xdp-tools/patches/0001-xdp-avoid-stddef.h-and-size_t-in-BPF-headers.patch Normal file
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@ -0,0 +1,64 @@
From a90c30902e6dc4d220738248dd7785e51bb19904 Mon Sep 17 00:00:00 2001
From: Nick Hainke <vincent@systemli.org>
Date: Tue, 10 Feb 2026 19:59:42 +0100
Subject: [PATCH] xdp: avoid stddef.h and size_t in BPF headers
Remove <stddef.h> includes that break BPF builds on some toolchains.
Replace size_t in xdp_sample_shared.h with unsigned long long to keep
structs usable without stddef definitions.
Signed-off-by: Nick Hainke <vincent@systemli.org>
---
headers/xdp/parsing_helpers.h | 1 -
headers/xdp/xdp_sample_common.bpf.h | 1 -
headers/xdp/xdp_sample_shared.h | 16 +++++++---------
3 files changed, 7 insertions(+), 11 deletions(-)
--- a/headers/xdp/parsing_helpers.h
+++ b/headers/xdp/parsing_helpers.h
@@ -15,7 +15,6 @@
#ifndef __PARSING_HELPERS_H
#define __PARSING_HELPERS_H
-#include <stddef.h>
#include <linux/if_ether.h>
#include <linux/if_packet.h>
#include <linux/ip.h>
--- a/headers/xdp/xdp_sample_common.bpf.h
+++ b/headers/xdp/xdp_sample_common.bpf.h
@@ -6,7 +6,6 @@
#include "xdp_sample.bpf.h"
#include <bpf/vmlinux.h>
-#include <stddef.h>
#include <stdbool.h>
#include <bpf/bpf_tracing.h>
#include <bpf/bpf_core_read.h>
--- a/headers/xdp/xdp_sample_shared.h
+++ b/headers/xdp/xdp_sample_shared.h
@@ -2,18 +2,16 @@
#ifndef _XDP_SAMPLE_SHARED_H
#define _XDP_SAMPLE_SHARED_H
-#include <stddef.h>
-
struct datarec {
- size_t processed;
- size_t dropped;
- size_t issue;
+ unsigned long long processed;
+ unsigned long long dropped;
+ unsigned long long issue;
union {
- size_t xdp_pass;
- size_t info;
+ unsigned long long xdp_pass;
+ unsigned long long info;
};
- size_t xdp_drop;
- size_t xdp_redirect;
+ unsigned long long xdp_drop;
+ unsigned long long xdp_redirect;
} __attribute__((aligned(64)));
#endif