LXR linux/net/8021q/vlan

   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}
  74