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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 */ | |
52 | static void | |
53 | map_slaves_to_bridge (struct interface *br_if, int link) | |
54 | { | |
55 | struct vrf *vrf; | |
56 | struct listnode *node; | |
57 | struct interface *ifp; | |
58 | ||
59 | RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name) | |
60 | { | |
61 | for (ALL_LIST_ELEMENTS_RO (vrf->iflist, node, ifp)) | |
62 | { | |
63 | struct zebra_if *zif; | |
64 | struct zebra_l2info_brslave *br_slave; | |
65 | ||
66 | if (ifp->ifindex == IFINDEX_INTERNAL || | |
67 | !ifp->info) | |
68 | continue; | |
69 | if (!IS_ZEBRA_IF_BRIDGE_SLAVE (ifp)) | |
70 | continue; | |
71 | ||
72 | /* NOTE: This assumes 'zebra_l2info_brslave' is the first field | |
73 | * for any L2 interface. | |
74 | */ | |
75 | zif = (struct zebra_if *) ifp->info; | |
76 | br_slave = &zif->brslave_info; | |
77 | ||
78 | if (link) | |
79 | { | |
80 | if (br_slave->bridge_ifindex == br_if->ifindex) | |
81 | br_slave->br_if = br_if; | |
82 | } | |
83 | else | |
84 | { | |
85 | if (br_slave->br_if == br_if) | |
86 | br_slave->br_if = NULL; | |
87 | } | |
88 | } | |
89 | } | |
90 | } | |
91 | ||
92 | /* Public functions */ | |
93 | void | |
94 | zebra_l2_map_slave_to_bridge (struct zebra_l2info_brslave *br_slave) | |
95 | { | |
96 | struct interface *br_if; | |
97 | ||
98 | /* TODO: Handle change of master */ | |
99 | br_if = if_lookup_by_index_per_ns (zebra_ns_lookup (NS_DEFAULT), | |
100 | br_slave->bridge_ifindex); | |
101 | if (br_if) | |
102 | br_slave->br_if = br_if; | |
103 | } | |
104 | ||
105 | void | |
106 | zebra_l2_unmap_slave_from_bridge (struct zebra_l2info_brslave *br_slave) | |
107 | { | |
108 | br_slave->br_if = NULL; | |
109 | } | |
110 | ||
111 | /* | |
112 | * Handle Bridge interface add or update. Update relevant info, | |
113 | * map slaves (if any) to the bridge. | |
114 | */ | |
115 | void | |
116 | zebra_l2_bridge_add_update (struct interface *ifp, | |
117 | struct zebra_l2info_bridge *bridge_info, | |
118 | int add) | |
119 | { | |
120 | struct zebra_if *zif; | |
121 | ||
122 | zif = ifp->info; | |
123 | assert(zif); | |
124 | ||
125 | /* Copy over the L2 information. */ | |
126 | memcpy (&zif->l2info.br, bridge_info, sizeof (*bridge_info)); | |
127 | ||
128 | /* Link all slaves to this bridge */ | |
129 | map_slaves_to_bridge (ifp, 1); | |
130 | } | |
131 | ||
132 | /* | |
133 | * Handle Bridge interface delete. | |
134 | */ | |
135 | void | |
136 | zebra_l2_bridge_del (struct interface *ifp) | |
137 | { | |
138 | /* Unlink all slaves to this bridge */ | |
139 | map_slaves_to_bridge (ifp, 0); | |
140 | } | |
141 | ||
142 | /* | |
143 | * Update L2 info for a VLAN interface. Only relevant parameter is the | |
144 | * VLAN Id and this cannot change. | |
145 | */ | |
146 | void | |
147 | zebra_l2_vlanif_update (struct interface *ifp, | |
148 | struct zebra_l2info_vlan *vlan_info) | |
149 | { | |
150 | struct zebra_if *zif; | |
151 | ||
152 | zif = ifp->info; | |
153 | assert(zif); | |
154 | ||
155 | /* Copy over the L2 information. */ | |
156 | memcpy (&zif->l2info.vl, vlan_info, sizeof (*vlan_info)); | |
157 | } | |
158 | ||
159 | /* | |
160 | * Update L2 info for a VxLAN interface. This is called upon interface | |
161 | * addition as well as update. Upon add, need to invoke the VNI create | |
162 | * function. Upon update, the params of interest are the local tunnel | |
163 | * IP and VLAN mapping, but the latter is handled separately. | |
164 | */ | |
165 | void | |
166 | zebra_l2_vxlanif_add_update (struct interface *ifp, | |
167 | struct zebra_l2info_vxlan *vxlan_info, | |
168 | int add) | |
169 | { | |
170 | struct zebra_if *zif; | |
171 | struct in_addr old_vtep_ip; | |
172 | ||
173 | zif = ifp->info; | |
174 | assert(zif); | |
175 | ||
176 | if (add) | |
177 | { | |
178 | memcpy (&zif->l2info.vxl, vxlan_info, sizeof (*vxlan_info)); | |
13d60d35 | 179 | zebra_vxlan_if_add (ifp); |
6675513d | 180 | return; |
181 | } | |
182 | ||
183 | old_vtep_ip = zif->l2info.vxl.vtep_ip; | |
184 | if (IPV4_ADDR_SAME(&old_vtep_ip, &vxlan_info->vtep_ip)) | |
185 | return; | |
186 | ||
187 | zif->l2info.vxl.vtep_ip = vxlan_info->vtep_ip; | |
13d60d35 | 188 | zebra_vxlan_if_update (ifp, ZEBRA_VXLIF_LOCAL_IP_CHANGE); |
6675513d | 189 | } |
190 | ||
191 | /* | |
192 | * Handle change to VLAN to VNI mapping. | |
193 | */ | |
194 | void | |
195 | zebra_l2_vxlanif_update_access_vlan (struct interface *ifp, | |
196 | vlanid_t access_vlan) | |
197 | { | |
198 | struct zebra_if *zif; | |
13d60d35 | 199 | vlanid_t old_access_vlan; |
6675513d | 200 | |
201 | zif = ifp->info; | |
202 | assert(zif); | |
203 | ||
13d60d35 | 204 | old_access_vlan = zif->l2info.vxl.access_vlan; |
205 | if (old_access_vlan == access_vlan) | |
206 | return; | |
207 | ||
6675513d | 208 | zif->l2info.vxl.access_vlan = access_vlan; |
13d60d35 | 209 | zebra_vxlan_if_update (ifp, ZEBRA_VXLIF_VLAN_CHANGE); |
6675513d | 210 | } |
211 | ||
212 | /* | |
213 | * Handle VxLAN interface delete. | |
214 | */ | |
215 | void | |
216 | zebra_l2_vxlanif_del (struct interface *ifp) | |
217 | { | |
13d60d35 | 218 | zebra_vxlan_if_del (ifp); |
6675513d | 219 | } |
220 | ||
221 | /* | |
222 | * Map or unmap interface from bridge. | |
223 | * NOTE: It is currently assumped that an interface has to be unmapped | |
224 | * from a bridge before it can be mapped to another bridge. | |
225 | */ | |
226 | void | |
227 | zebra_l2if_update_bridge_slave (struct interface *ifp, | |
228 | ifindex_t bridge_ifindex) | |
229 | { | |
230 | struct zebra_if *zif; | |
231 | ifindex_t old_bridge_ifindex; | |
232 | ||
233 | zif = ifp->info; | |
234 | assert(zif); | |
235 | ||
236 | old_bridge_ifindex = zif->brslave_info.bridge_ifindex; | |
237 | if (old_bridge_ifindex == bridge_ifindex) | |
238 | return; | |
239 | ||
240 | zif->brslave_info.bridge_ifindex = bridge_ifindex; | |
241 | ||
242 | /* Set up or remove link with master */ | |
243 | if (bridge_ifindex != IFINDEX_INTERNAL) | |
244 | zebra_l2_map_slave_to_bridge (&zif->brslave_info); | |
245 | else if (old_bridge_ifindex != IFINDEX_INTERNAL) | |
246 | zebra_l2_unmap_slave_from_bridge (&zif->brslave_info); | |
13d60d35 | 247 | |
248 | /* In the case of VxLAN, invoke the handler for EVPN. */ | |
249 | if (zif->zif_type == ZEBRA_IF_VXLAN) | |
250 | zebra_vxlan_if_update (ifp, ZEBRA_VXLIF_MASTER_CHANGE); | |
6675513d | 251 | } |