| 1 | // SPDX-License-Identifier: GPL-2.0-only |
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| 2 | /* |
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| 3 | * IEEE 802.1Q Multiple VLAN Registration Protocol (MVRP) |
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| 4 | * |
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| 5 | * Copyright (c) 2012 Massachusetts Institute of Technology |
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| 6 | * |
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| 7 | * Adapted from code in net/8021q/vlan_gvrp.c |
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| 8 | * Copyright (c) 2008 Patrick McHardy <kaber@trash.net> |
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| 9 | */ |
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| 10 | #include <linux/types.h> |
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| 11 | #include <linux/if_ether.h> |
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| 12 | #include <linux/if_vlan.h> |
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| 13 | #include <net/mrp.h> |
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| 14 | #include "vlan.h" |
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| 15 | |
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| 16 | #define MRP_MVRP_ADDRESS { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x21 } |
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| 17 | |
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| 18 | enum mvrp_attributes { |
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| 19 | MVRP_ATTR_INVALID, |
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| 20 | MVRP_ATTR_VID, |
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| 21 | __MVRP_ATTR_MAX |
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| 22 | }; |
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| 23 | #define MVRP_ATTR_MAX (__MVRP_ATTR_MAX - 1) |
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| 24 | |
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| 25 | static struct mrp_application vlan_mrp_app __read_mostly = { |
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| 26 | .type = MRP_APPLICATION_MVRP, |
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| 27 | .maxattr = MVRP_ATTR_MAX, |
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| 28 | .pkttype.type = htons(ETH_P_MVRP), |
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| 29 | .group_address = MRP_MVRP_ADDRESS, |
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| 30 | .version = 0, |
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| 31 | }; |
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| 32 | |
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| 33 | int vlan_mvrp_request_join(const struct net_device *dev) |
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| 34 | { |
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| 35 | const struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
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| 36 | __be16 vlan_id = htons(vlan->vlan_id); |
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| 37 | |
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| 38 | if (vlan->vlan_proto != htons(ETH_P_8021Q)) |
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| 39 | return 0; |
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| 40 | return mrp_request_join(dev: vlan->real_dev, app: &vlan_mrp_app, |
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| 41 | value: &vlan_id, len: sizeof(vlan_id), type: MVRP_ATTR_VID); |
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| 42 | } |
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| 43 | |
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| 44 | void vlan_mvrp_request_leave(const struct net_device *dev) |
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| 45 | { |
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| 46 | const struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
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| 47 | __be16 vlan_id = htons(vlan->vlan_id); |
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| 48 | |
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| 49 | if (vlan->vlan_proto != htons(ETH_P_8021Q)) |
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| 50 | return; |
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| 51 | mrp_request_leave(dev: vlan->real_dev, app: &vlan_mrp_app, |
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| 52 | value: &vlan_id, len: sizeof(vlan_id), type: MVRP_ATTR_VID); |
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| 53 | } |
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| 54 | |
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| 55 | int vlan_mvrp_init_applicant(struct net_device *dev) |
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| 56 | { |
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| 57 | return mrp_init_applicant(dev, app: &vlan_mrp_app); |
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| 58 | } |
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| 59 | |
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| 60 | void vlan_mvrp_uninit_applicant(struct net_device *dev) |
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| 61 | { |
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| 62 | mrp_uninit_applicant(dev, app: &vlan_mrp_app); |
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| 63 | } |
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| 64 | |
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| 65 | int __init vlan_mvrp_init(void) |
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| 66 | { |
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| 67 | return mrp_register_application(app: &vlan_mrp_app); |
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| 68 | } |
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| 69 | |
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| 70 | void vlan_mvrp_uninit(void) |
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| 71 | { |
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| 72 | mrp_unregister_application(app: &vlan_mrp_app); |
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| 73 | } |
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| 74 | |
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