net/8021q/vlan_mvrp.c

   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
  21 enum 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
  28 static 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
  36 int 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
  47 void 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
  58 int vlan_mvrp_init_applicant(struct net_device *dev)
  59 {
  60         return mrp_init_applicant(dev, &vlan_mrp_app);
  61 }
  62
  63 void vlan_mvrp_uninit_applicant(struct net_device *dev)
  64 {
  65         mrp_uninit_applicant(dev, &vlan_mrp_app);
  66 }
  67
  68 int __init vlan_mvrp_init(void)
  69 {
  70         return mrp_register_application(&vlan_mrp_app);
  71 }
  72
  73 void vlan_mvrp_uninit(void)
  74 {
  75         mrp_unregister_application(&vlan_mrp_app);
  76 }