cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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vlan_mvrp.c (1799B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 *	IEEE 802.1Q Multiple VLAN Registration Protocol (MVRP)
      4 *
      5 *	Copyright (c) 2012 Massachusetts Institute of Technology
      6 *
      7 *	Adapted from code in net/8021q/vlan_gvrp.c
      8 *	Copyright (c) 2008 Patrick McHardy <kaber@trash.net>
      9 */
     10#include <linux/types.h>
     11#include <linux/if_ether.h>
     12#include <linux/if_vlan.h>
     13#include <net/mrp.h>
     14#include "vlan.h"
     15
     16#define MRP_MVRP_ADDRESS	{ 0x01, 0x80, 0xc2, 0x00, 0x00, 0x21 }
     17
     18enum mvrp_attributes {
     19	MVRP_ATTR_INVALID,
     20	MVRP_ATTR_VID,
     21	__MVRP_ATTR_MAX
     22};
     23#define MVRP_ATTR_MAX	(__MVRP_ATTR_MAX - 1)
     24
     25static struct mrp_application vlan_mrp_app __read_mostly = {
     26	.type		= MRP_APPLICATION_MVRP,
     27	.maxattr	= MVRP_ATTR_MAX,
     28	.pkttype.type	= htons(ETH_P_MVRP),
     29	.group_address	= MRP_MVRP_ADDRESS,
     30	.version	= 0,
     31};
     32
     33int vlan_mvrp_request_join(const struct net_device *dev)
     34{
     35	const struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
     36	__be16 vlan_id = htons(vlan->vlan_id);
     37
     38	if (vlan->vlan_proto != htons(ETH_P_8021Q))
     39		return 0;
     40	return mrp_request_join(vlan->real_dev, &vlan_mrp_app,
     41				&vlan_id, sizeof(vlan_id), MVRP_ATTR_VID);
     42}
     43
     44void vlan_mvrp_request_leave(const struct net_device *dev)
     45{
     46	const struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
     47	__be16 vlan_id = htons(vlan->vlan_id);
     48
     49	if (vlan->vlan_proto != htons(ETH_P_8021Q))
     50		return;
     51	mrp_request_leave(vlan->real_dev, &vlan_mrp_app,
     52			  &vlan_id, sizeof(vlan_id), MVRP_ATTR_VID);
     53}
     54
     55int vlan_mvrp_init_applicant(struct net_device *dev)
     56{
     57	return mrp_init_applicant(dev, &vlan_mrp_app);
     58}
     59
     60void vlan_mvrp_uninit_applicant(struct net_device *dev)
     61{
     62	mrp_uninit_applicant(dev, &vlan_mrp_app);
     63}
     64
     65int __init vlan_mvrp_init(void)
     66{
     67	return mrp_register_application(&vlan_mrp_app);
     68}
     69
     70void vlan_mvrp_uninit(void)
     71{
     72	mrp_unregister_application(&vlan_mrp_app);
     73}