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
18 enum 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
25 static 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
33 int 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
44 void 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
55 int vlan_mvrp_init_applicant(struct net_device *dev)
56 {
57 return mrp_init_applicant(dev, &vlan_mrp_app);
58 }
59
60 void vlan_mvrp_uninit_applicant(struct net_device *dev)
61 {
62 mrp_uninit_applicant(dev, &vlan_mrp_app);
63 }
64
65 int __init vlan_mvrp_init(void)
66 {
67 return mrp_register_application(&vlan_mrp_app);
68 }
69
70 void vlan_mvrp_uninit(void)
71 {
72 mrp_unregister_application(&vlan_mrp_app);
73 }
74
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