From d073f650cdef24dce957099e55b660124fe2e0a4 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@nbd.name>
Date: Fri, 23 Mar 2018 12:53:44 +0100
Subject: kernel: add support for enabling hardware flow offload via iptables

Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
 .../iptables/patches/800-flowoffload_target.patch  | 87 ++++++++++++++++++++--
 1 file changed, 82 insertions(+), 5 deletions(-)

(limited to 'package/network')

diff --git a/package/network/utils/iptables/patches/800-flowoffload_target.patch b/package/network/utils/iptables/patches/800-flowoffload_target.patch
index c6fe65cd3e..2f79ee835a 100644
--- a/package/network/utils/iptables/patches/800-flowoffload_target.patch
+++ b/package/network/utils/iptables/patches/800-flowoffload_target.patch
@@ -1,14 +1,71 @@
 --- /dev/null
 +++ b/extensions/libxt_FLOWOFFLOAD.c
-@@ -0,0 +1,15 @@
+@@ -0,0 +1,72 @@
++#include <stdio.h>
 +#include <xtables.h>
++#include <linux/netfilter/xt_FLOWOFFLOAD.h>
++
++enum {
++    O_HW,
++};
++
++static void offload_help(void)
++{
++	printf(
++"FLOWOFFLOAD target options:\n"
++" --hw				Enable hardware offload\n"
++	);
++}
++
++static const struct xt_option_entry offload_opts[] = {
++	{.name = "hw", .id = O_HW, .type = XTTYPE_NONE},
++	XTOPT_TABLEEND,
++};
++
++static void offload_parse(struct xt_option_call *cb)
++{
++	struct xt_flowoffload_target_info *info = cb->data;
++
++	xtables_option_parse(cb);
++	switch (cb->entry->id) {
++	case O_HW:
++		info->flags |= XT_FLOWOFFLOAD_HW;
++		break;
++	}
++}
++
++static void offload_print(const void *ip, const struct xt_entry_target *target, int numeric)
++{
++	const struct xt_flowoffload_target_info *info =
++		(const struct xt_flowoffload_target_info *)target->data;
++
++	printf(" FLOWOFFLOAD");
++	if (info->flags & XT_FLOWOFFLOAD_HW)
++		printf(" hw");
++}
++
++static void offload_save(const void *ip, const struct xt_entry_target *target)
++{
++	const struct xt_flowoffload_target_info *info =
++		(const struct xt_flowoffload_target_info *)target->data;
++
++	if (info->flags & XT_FLOWOFFLOAD_HW)
++		printf(" --hw");
++}
 +
 +static struct xtables_target offload_tg_reg[] = {
 +	{
-+		.family        = NFPROTO_UNSPEC,
-+		.name          = "FLOWOFFLOAD",
-+		.revision      = 0,
-+		.version       = XTABLES_VERSION,
++		.family		= NFPROTO_UNSPEC,
++		.name		= "FLOWOFFLOAD",
++		.revision	= 0,
++		.version	= XTABLES_VERSION,
++		.size		= XT_ALIGN(sizeof(struct xt_flowoffload_target_info)),
++		.userspacesize	= sizeof(struct xt_flowoffload_target_info),
++		.help		= offload_help,
++		.print		= offload_print,
++		.save		= offload_save,
++		.x6_parse	= offload_parse,
++		.x6_options	= offload_opts,
 +	},
 +};
 +
@@ -16,3 +73,23 @@
 +{
 +	xtables_register_targets(offload_tg_reg, ARRAY_SIZE(offload_tg_reg));
 +}
+--- /dev/null
++++ b/include/linux/netfilter/xt_FLOWOFFLOAD.h
+@@ -0,0 +1,17 @@
++/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
++#ifndef _XT_FLOWOFFLOAD_H
++#define _XT_FLOWOFFLOAD_H
++
++#include <linux/types.h>
++
++enum {
++	XT_FLOWOFFLOAD_HW	= 1 << 0,
++
++	XT_FLOWOFFLOAD_MASK	= XT_FLOWOFFLOAD_HW
++};
++
++struct xt_flowoffload_target_info {
++	__u32 flags;
++};
++
++#endif /* _XT_FLOWOFFLOAD_H */
-- 
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