2874c5fd28
Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
91 lines
2 KiB
C
91 lines
2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Handle firewalling core
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* Linux ethernet bridge
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*
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* Authors:
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* Lennert Buytenhek <buytenh@gnu.org>
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* Bart De Schuymer <bdschuym@pandora.be>
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*
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* Lennert dedicates this file to Kerstin Wurdinger.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/in_route.h>
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#include <linux/inetdevice.h>
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#include <net/route.h>
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#include "br_private.h"
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#ifdef CONFIG_SYSCTL
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#include <linux/sysctl.h>
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#endif
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static void fake_update_pmtu(struct dst_entry *dst, struct sock *sk,
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struct sk_buff *skb, u32 mtu)
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{
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}
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static void fake_redirect(struct dst_entry *dst, struct sock *sk,
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struct sk_buff *skb)
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{
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}
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static u32 *fake_cow_metrics(struct dst_entry *dst, unsigned long old)
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{
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return NULL;
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}
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static struct neighbour *fake_neigh_lookup(const struct dst_entry *dst,
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struct sk_buff *skb,
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const void *daddr)
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{
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return NULL;
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}
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static unsigned int fake_mtu(const struct dst_entry *dst)
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{
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return dst->dev->mtu;
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}
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static struct dst_ops fake_dst_ops = {
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.family = AF_INET,
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.update_pmtu = fake_update_pmtu,
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.redirect = fake_redirect,
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.cow_metrics = fake_cow_metrics,
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.neigh_lookup = fake_neigh_lookup,
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.mtu = fake_mtu,
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};
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/*
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* Initialize bogus route table used to keep netfilter happy.
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* Currently, we fill in the PMTU entry because netfilter
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* refragmentation needs it, and the rt_flags entry because
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* ipt_REJECT needs it. Future netfilter modules might
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* require us to fill additional fields.
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*/
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static const u32 br_dst_default_metrics[RTAX_MAX] = {
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[RTAX_MTU - 1] = 1500,
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};
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void br_netfilter_rtable_init(struct net_bridge *br)
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{
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struct rtable *rt = &br->fake_rtable;
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atomic_set(&rt->dst.__refcnt, 1);
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rt->dst.dev = br->dev;
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dst_init_metrics(&rt->dst, br_dst_default_metrics, true);
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rt->dst.flags = DST_NOXFRM | DST_FAKE_RTABLE;
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rt->dst.ops = &fake_dst_ops;
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}
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int __init br_nf_core_init(void)
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{
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return dst_entries_init(&fake_dst_ops);
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}
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void br_nf_core_fini(void)
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{
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dst_entries_destroy(&fake_dst_ops);
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}
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