From 04dd17822334871b23ea2862f7798fb0e0007777 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Sat, 11 May 2024 08:53:19 +0000
Subject: [PATCH] change otg to host mode
---
kernel/net/ipv4/gre_demux.c | 18 +++++++++---------
1 files changed, 9 insertions(+), 9 deletions(-)
diff --git a/kernel/net/ipv4/gre_demux.c b/kernel/net/ipv4/gre_demux.c
index 9376b30..5d1e6fe 100644
--- a/kernel/net/ipv4/gre_demux.c
+++ b/kernel/net/ipv4/gre_demux.c
@@ -1,13 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* GRE over IPv4 demultiplexer driver
*
* Authors: Dmitry Kozlov (xeb@mail.ru)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
@@ -90,7 +85,7 @@
options = (__be32 *)(greh + 1);
if (greh->flags & GRE_CSUM) {
if (!skb_checksum_simple_validate(skb)) {
- skb_checksum_try_convert(skb, IPPROTO_GRE, 0,
+ skb_checksum_try_convert(skb, IPPROTO_GRE,
null_compute_pseudo);
} else if (csum_err) {
*csum_err = true;
@@ -176,20 +171,25 @@
return NET_RX_DROP;
}
-static void gre_err(struct sk_buff *skb, u32 info)
+static int gre_err(struct sk_buff *skb, u32 info)
{
const struct gre_protocol *proto;
const struct iphdr *iph = (const struct iphdr *)skb->data;
u8 ver = skb->data[(iph->ihl<<2) + 1]&0x7f;
+ int err = 0;
if (ver >= GREPROTO_MAX)
- return;
+ return -EINVAL;
rcu_read_lock();
proto = rcu_dereference(gre_proto[ver]);
if (proto && proto->err_handler)
proto->err_handler(skb, info);
+ else
+ err = -EPROTONOSUPPORT;
rcu_read_unlock();
+
+ return err;
}
static const struct net_protocol net_gre_protocol = {
--
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