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