LXR linux/net/8021q/vlan

   1/*
   2 *      IEEE 802.1Q Multiple VLAN Registration Protocol (MVRP)
   3 *
   4 *      Copyright (c) 2012 Massachusetts Institute of Technology
   5 *
   6 *      Adapted from code in net/8021q/vlan_gvrp.c
   7 *      Copyright (c) 2008 Patrick McHardy <kaber@trash.net>
   8 *
   9 *      This program is free software; you can redistribute it and/or
  10 *      modify it under the terms of the GNU General Public License
  11 *      version 2 as published by the Free Software Foundation.
  12 */
  13#include <linux/types.h>
  14#include <linux/if_ether.h>
  15#include <linux/if_vlan.h>
  16#include <net/mrp.h>
  17#include "vlan.h"
  18
  19#define MRP_MVRP_ADDRESS        { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x21 }
  20
  21enum mvrp_attributes {
  22        MVRP_ATTR_INVALID,
  23        MVRP_ATTR_VID,
  24        __MVRP_ATTR_MAX
  25};
  26#define MVRP_ATTR_MAX   (__MVRP_ATTR_MAX - 1)
  27
  28static struct mrp_application vlan_mrp_app __read_mostly = {
  29        .type           = MRP_APPLICATION_MVRP,
  30        .maxattr        = MVRP_ATTR_MAX,
  31        .pkttype.type   = htons(ETH_P_MVRP),
  32        .group_address  = MRP_MVRP_ADDRESS,
  33        .version        = 0,
  34};
  35
  36int vlan_mvrp_request_join(const struct net_device *dev)
  37{
  38        const struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
  39        __be16 vlan_id = htons(vlan->vlan_id);
  40
  41        if (vlan->vlan_proto != htons(ETH_P_8021Q))
  42                return 0;
  43        return mrp_request_join(vlan->real_dev, &vlan_mrp_app,
  44                                &vlan_id, sizeof(vlan_id), MVRP_ATTR_VID);
  45}
  46
  47void vlan_mvrp_request_leave(const struct net_device *dev)
  48{
  49        const struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
  50        __be16 vlan_id = htons(vlan->vlan_id);
  51
  52        if (vlan->vlan_proto != htons(ETH_P_8021Q))
  53                return;
  54        mrp_request_leave(vlan->real_dev, &vlan_mrp_app,
  55                          &vlan_id, sizeof(vlan_id), MVRP_ATTR_VID);
  56}
  57
  58int vlan_mvrp_init_applicant(struct net_device *dev)
  59{
  60        return mrp_init_applicant(dev, &vlan_mrp_app);
  61}
  62
  63void vlan_mvrp_uninit_applicant(struct net_device *dev)
  64{
  65        mrp_uninit_applicant(dev, &vlan_mrp_app);
  66}
  67
  68int __init vlan_mvrp_init(void)
  69{
  70        return mrp_register_application(&vlan_mrp_app);
  71}
  72
  73void vlan_mvrp_uninit(void)
  74{
  75        mrp_unregister_application(&vlan_mrp_app);
  76}
  77