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6675513d | 1 | /* |
2 | * Zebra Layer-2 interface handling code | |
3 | * Copyright (C) 2016, 2017 Cumulus Networks, Inc. | |
4 | * | |
5 | * This file is part of FRR. | |
6 | * | |
7 | * FRR is free software; you can redistribute it and/or modify it | |
8 | * under the terms of the GNU General Public License as published by the | |
9 | * Free Software Foundation; either version 2, or (at your option) any | |
10 | * later version. | |
11 | * | |
12 | * FRR is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with FRR; see the file COPYING. If not, write to the Free | |
19 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
20 | * 02111-1307, USA. | |
21 | */ | |
22 | ||
23 | #include <zebra.h> | |
24 | ||
25 | #include "if.h" | |
26 | #include "prefix.h" | |
27 | #include "table.h" | |
28 | #include "memory.h" | |
29 | #include "log.h" | |
30 | #include "linklist.h" | |
31 | #include "stream.h" | |
32 | #include "hash.h" | |
33 | #include "jhash.h" | |
34 | ||
35 | #include "zebra/rib.h" | |
36 | #include "zebra/rt.h" | |
37 | #include "zebra/zebra_ns.h" | |
38 | #include "zebra/zserv.h" | |
39 | #include "zebra/debug.h" | |
40 | #include "zebra/interface.h" | |
41 | #include "zebra/zebra_memory.h" | |
42 | #include "zebra/zebra_vrf.h" | |
43 | #include "zebra/rt_netlink.h" | |
44 | #include "zebra/zebra_l2.h" | |
13d60d35 | 45 | #include "zebra/zebra_vxlan.h" |
6675513d | 46 | |
47 | /* definitions */ | |
48 | ||
49 | /* static function declarations */ | |
50 | ||
51 | /* Private functions */ | |
d62a17ae | 52 | static void map_slaves_to_bridge(struct interface *br_if, int link) |
6675513d | 53 | { |
d62a17ae | 54 | struct vrf *vrf; |
d62a17ae | 55 | struct interface *ifp; |
56 | ||
a2addae8 | 57 | RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name) { |
451fda4f | 58 | FOR_ALL_INTERFACES (vrf, ifp) { |
d62a17ae | 59 | struct zebra_if *zif; |
60 | struct zebra_l2info_brslave *br_slave; | |
61 | ||
62 | if (ifp->ifindex == IFINDEX_INTERNAL || !ifp->info) | |
63 | continue; | |
64 | if (!IS_ZEBRA_IF_BRIDGE_SLAVE(ifp)) | |
65 | continue; | |
66 | ||
67 | /* NOTE: This assumes 'zebra_l2info_brslave' is the | |
68 | * first field | |
69 | * for any L2 interface. | |
70 | */ | |
71 | zif = (struct zebra_if *)ifp->info; | |
72 | br_slave = &zif->brslave_info; | |
73 | ||
74 | if (link) { | |
75 | if (br_slave->bridge_ifindex == br_if->ifindex) | |
76 | br_slave->br_if = br_if; | |
77 | } else { | |
78 | if (br_slave->br_if == br_if) | |
79 | br_slave->br_if = NULL; | |
80 | } | |
81 | } | |
82 | } | |
6675513d | 83 | } |
84 | ||
85 | /* Public functions */ | |
d62a17ae | 86 | void zebra_l2_map_slave_to_bridge(struct zebra_l2info_brslave *br_slave) |
6675513d | 87 | { |
d62a17ae | 88 | struct interface *br_if; |
6675513d | 89 | |
d62a17ae | 90 | /* TODO: Handle change of master */ |
91 | br_if = if_lookup_by_index_per_ns(zebra_ns_lookup(NS_DEFAULT), | |
92 | br_slave->bridge_ifindex); | |
93 | if (br_if) | |
94 | br_slave->br_if = br_if; | |
6675513d | 95 | } |
96 | ||
d62a17ae | 97 | void zebra_l2_unmap_slave_from_bridge(struct zebra_l2info_brslave *br_slave) |
6675513d | 98 | { |
d62a17ae | 99 | br_slave->br_if = NULL; |
6675513d | 100 | } |
101 | ||
102 | /* | |
103 | * Handle Bridge interface add or update. Update relevant info, | |
104 | * map slaves (if any) to the bridge. | |
105 | */ | |
d62a17ae | 106 | void zebra_l2_bridge_add_update(struct interface *ifp, |
107 | struct zebra_l2info_bridge *bridge_info, | |
108 | int add) | |
6675513d | 109 | { |
d62a17ae | 110 | struct zebra_if *zif; |
6675513d | 111 | |
d62a17ae | 112 | zif = ifp->info; |
113 | assert(zif); | |
6675513d | 114 | |
d62a17ae | 115 | /* Copy over the L2 information. */ |
116 | memcpy(&zif->l2info.br, bridge_info, sizeof(*bridge_info)); | |
6675513d | 117 | |
d62a17ae | 118 | /* Link all slaves to this bridge */ |
119 | map_slaves_to_bridge(ifp, 1); | |
6675513d | 120 | } |
121 | ||
122 | /* | |
123 | * Handle Bridge interface delete. | |
124 | */ | |
d62a17ae | 125 | void zebra_l2_bridge_del(struct interface *ifp) |
6675513d | 126 | { |
d62a17ae | 127 | /* Unlink all slaves to this bridge */ |
128 | map_slaves_to_bridge(ifp, 0); | |
6675513d | 129 | } |
130 | ||
131 | /* | |
132 | * Update L2 info for a VLAN interface. Only relevant parameter is the | |
133 | * VLAN Id and this cannot change. | |
134 | */ | |
d62a17ae | 135 | void zebra_l2_vlanif_update(struct interface *ifp, |
136 | struct zebra_l2info_vlan *vlan_info) | |
6675513d | 137 | { |
d62a17ae | 138 | struct zebra_if *zif; |
6675513d | 139 | |
d62a17ae | 140 | zif = ifp->info; |
141 | assert(zif); | |
6675513d | 142 | |
d62a17ae | 143 | /* Copy over the L2 information. */ |
144 | memcpy(&zif->l2info.vl, vlan_info, sizeof(*vlan_info)); | |
6675513d | 145 | } |
146 | ||
147 | /* | |
148 | * Update L2 info for a VxLAN interface. This is called upon interface | |
149 | * addition as well as update. Upon add, need to invoke the VNI create | |
150 | * function. Upon update, the params of interest are the local tunnel | |
151 | * IP and VLAN mapping, but the latter is handled separately. | |
152 | */ | |
d62a17ae | 153 | void zebra_l2_vxlanif_add_update(struct interface *ifp, |
154 | struct zebra_l2info_vxlan *vxlan_info, int add) | |
6675513d | 155 | { |
d62a17ae | 156 | struct zebra_if *zif; |
157 | struct in_addr old_vtep_ip; | |
6675513d | 158 | |
d62a17ae | 159 | zif = ifp->info; |
160 | assert(zif); | |
6675513d | 161 | |
d62a17ae | 162 | if (add) { |
163 | memcpy(&zif->l2info.vxl, vxlan_info, sizeof(*vxlan_info)); | |
164 | zebra_vxlan_if_add(ifp); | |
165 | return; | |
166 | } | |
6675513d | 167 | |
d62a17ae | 168 | old_vtep_ip = zif->l2info.vxl.vtep_ip; |
169 | if (IPV4_ADDR_SAME(&old_vtep_ip, &vxlan_info->vtep_ip)) | |
170 | return; | |
6675513d | 171 | |
d62a17ae | 172 | zif->l2info.vxl.vtep_ip = vxlan_info->vtep_ip; |
173 | zebra_vxlan_if_update(ifp, ZEBRA_VXLIF_LOCAL_IP_CHANGE); | |
6675513d | 174 | } |
175 | ||
176 | /* | |
177 | * Handle change to VLAN to VNI mapping. | |
178 | */ | |
d62a17ae | 179 | void zebra_l2_vxlanif_update_access_vlan(struct interface *ifp, |
180 | vlanid_t access_vlan) | |
6675513d | 181 | { |
d62a17ae | 182 | struct zebra_if *zif; |
183 | vlanid_t old_access_vlan; | |
6675513d | 184 | |
d62a17ae | 185 | zif = ifp->info; |
186 | assert(zif); | |
6675513d | 187 | |
d62a17ae | 188 | old_access_vlan = zif->l2info.vxl.access_vlan; |
189 | if (old_access_vlan == access_vlan) | |
190 | return; | |
13d60d35 | 191 | |
d62a17ae | 192 | zif->l2info.vxl.access_vlan = access_vlan; |
193 | zebra_vxlan_if_update(ifp, ZEBRA_VXLIF_VLAN_CHANGE); | |
6675513d | 194 | } |
195 | ||
196 | /* | |
197 | * Handle VxLAN interface delete. | |
198 | */ | |
d62a17ae | 199 | void zebra_l2_vxlanif_del(struct interface *ifp) |
6675513d | 200 | { |
d62a17ae | 201 | zebra_vxlan_if_del(ifp); |
6675513d | 202 | } |
203 | ||
204 | /* | |
205 | * Map or unmap interface from bridge. | |
206 | * NOTE: It is currently assumped that an interface has to be unmapped | |
207 | * from a bridge before it can be mapped to another bridge. | |
208 | */ | |
d62a17ae | 209 | void zebra_l2if_update_bridge_slave(struct interface *ifp, |
210 | ifindex_t bridge_ifindex) | |
6675513d | 211 | { |
d62a17ae | 212 | struct zebra_if *zif; |
213 | ifindex_t old_bridge_ifindex; | |
6675513d | 214 | |
d62a17ae | 215 | zif = ifp->info; |
216 | assert(zif); | |
6675513d | 217 | |
d62a17ae | 218 | old_bridge_ifindex = zif->brslave_info.bridge_ifindex; |
219 | if (old_bridge_ifindex == bridge_ifindex) | |
220 | return; | |
6675513d | 221 | |
d62a17ae | 222 | zif->brslave_info.bridge_ifindex = bridge_ifindex; |
6675513d | 223 | |
d62a17ae | 224 | /* Set up or remove link with master */ |
af026ae4 | 225 | if (bridge_ifindex != IFINDEX_INTERNAL) { |
b682f6de | 226 | zebra_l2_map_slave_to_bridge(&zif->brslave_info); |
af026ae4 | 227 | /* In the case of VxLAN, invoke the handler for EVPN. */ |
228 | if (zif->zif_type == ZEBRA_IF_VXLAN) | |
b682f6de | 229 | zebra_vxlan_if_update(ifp, ZEBRA_VXLIF_MASTER_CHANGE); |
af026ae4 | 230 | } else if (old_bridge_ifindex != IFINDEX_INTERNAL) { |
57f7feb6 MK |
231 | /* |
232 | * In the case of VxLAN, invoke the handler for EVPN. | |
233 | * Note that this should be done *prior* | |
234 | * to unmapping the interface from the bridge. | |
af026ae4 | 235 | */ |
236 | if (zif->zif_type == ZEBRA_IF_VXLAN) | |
b682f6de | 237 | zebra_vxlan_if_update(ifp, ZEBRA_VXLIF_MASTER_CHANGE); |
238 | zebra_l2_unmap_slave_from_bridge(&zif->brslave_info); | |
af026ae4 | 239 | } |
6675513d | 240 | } |