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
|
/* Copyright (c) 2025, Red Hat, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <config.h>
#include "evpn-binding.h"
#include "neighbor-exchange.h"
#include "openvswitch/dynamic-string.h"
#include "openvswitch/vlog.h"
#include "ovn-sb-idl.h"
#include "packets.h"
#include "unixctl.h"
#include "evpn-arp.h"
VLOG_DEFINE_THIS_MODULE(evpn_arp);
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1);
static struct evpn_arp *evpn_arp_add(struct hmap *evpn_arps, struct eth_addr,
const struct in6_addr *, uint32_t vni);
static struct evpn_arp *evpn_arp_find(const struct hmap *evpn_arps,
struct eth_addr,
const struct in6_addr *,
uint32_t vni);
static uint32_t evpn_arp_hash(const struct eth_addr *, const struct in6_addr *,
uint32_t vni);
void
evpn_arp_run(const struct evpn_arp_ctx_in *arp_ctx_in,
struct evpn_arp_ctx_out *arp_ctx_out)
{
struct hmapx stale_arps = HMAPX_INITIALIZER(&stale_arps);
struct evpn_arp *arp;
HMAP_FOR_EACH (arp, hmap_node, arp_ctx_out->arps) {
hmapx_add(&stale_arps, arp);
}
const struct evpn_static_entry *static_arp;
HMAP_FOR_EACH (static_arp, hmap_node, arp_ctx_in->static_arps) {
const struct evpn_datapath *edp =
evpn_datapath_find(arp_ctx_in->datapaths, static_arp->vni);
if (!edp) {
char addr_s[INET6_ADDRSTRLEN + 1];
VLOG_WARN_RL(&rl, "Couldn't find EVPN datapath for ARP entry: "
"VNI: %"PRIu32" MAC: "ETH_ADDR_FMT" IP: %s.",
static_arp->vni, ETH_ADDR_ARGS(static_arp->mac),
ipv6_string_mapped(addr_s, &static_arp->ip)
? addr_s : "(invalid)");
continue;
}
arp = evpn_arp_find(arp_ctx_out->arps, static_arp->mac,
&static_arp->ip, static_arp->vni);
if (!arp) {
arp = evpn_arp_add(arp_ctx_out->arps, static_arp->mac,
&static_arp->ip, static_arp->vni);
}
bool updated = false;
if (arp->ldp != edp->ldp) {
arp->ldp = edp->ldp;
updated = true;
}
enum neigh_of_rule_prio priority =
smap_get_bool(&arp->ldp->datapath->external_ids,
"dynamic-routing-arp-prefer-local",
false)
? NEIGH_OF_EVPN_MAC_BINDING_LOW_PRIO
: NEIGH_OF_EVPN_MAC_BINDING_HIGH_PRIO;
if (arp->priority != priority) {
arp->priority = priority;
updated = true;
}
if (updated) {
hmapx_add(arp_ctx_out->updated_arps, arp);
}
hmapx_find_and_delete(&stale_arps, arp);
}
struct hmapx_node *node;
HMAPX_FOR_EACH (node, &stale_arps) {
arp = node->data;
uuidset_insert(arp_ctx_out->removed_arps, &arp->flow_uuid);
hmap_remove(arp_ctx_out->arps, &arp->hmap_node);
free(arp);
}
hmapx_destroy(&stale_arps);
}
void
evpn_arps_destroy(struct hmap *arps)
{
struct evpn_arp *arp;
HMAP_FOR_EACH_POP (arp, hmap_node, arps) {
free(arp);
}
hmap_destroy(arps);
}
void
evpn_arp_list(struct unixctl_conn *conn, int argc OVS_UNUSED,
const char *argv[] OVS_UNUSED, void *data_)
{
struct hmap *arps = data_;
struct ds ds = DS_EMPTY_INITIALIZER;
const struct evpn_arp *arp;
HMAP_FOR_EACH (arp, hmap_node, arps) {
char addr_s[INET6_ADDRSTRLEN + 1];
ds_put_format(&ds, "UUID: "UUID_FMT", VNI: %"PRIu32", "
"MAC: "ETH_ADDR_FMT", IP: %s, "
"dp_key: %"PRId64"\n",
UUID_ARGS(&arp->flow_uuid), arp->vni,
ETH_ADDR_ARGS(arp->mac),
ipv6_string_mapped(addr_s, &arp->ip)
? addr_s : "(invalid)",
arp->ldp->datapath->tunnel_key);
}
unixctl_command_reply(conn, ds_cstr_ro(&ds));
ds_destroy(&ds);
}
static struct evpn_arp *
evpn_arp_add(struct hmap *evpn_arps, struct eth_addr mac,
const struct in6_addr *ip, uint32_t vni)
{
struct evpn_arp *arp = xmalloc(sizeof *arp);
*arp = (struct evpn_arp) {
.flow_uuid = uuid_random(),
.mac = mac,
.ip = *ip,
.vni = vni,
};
hmap_insert(evpn_arps, &arp->hmap_node, evpn_arp_hash(&mac, ip, vni));
return arp;
}
static struct evpn_arp *
evpn_arp_find(const struct hmap *evpn_arps, struct eth_addr mac,
const struct in6_addr *ip, uint32_t vni)
{
uint32_t hash = evpn_arp_hash(&mac, ip, vni);
struct evpn_arp *arp;
HMAP_FOR_EACH_WITH_HASH (arp, hmap_node, hash, evpn_arps) {
if (arp->vni == vni && eth_addr_equals(arp->mac, mac) &&
ipv6_addr_equals(&arp->ip, ip)) {
return arp;
}
}
return NULL;
}
static uint32_t
evpn_arp_hash(const struct eth_addr *mac, const struct in6_addr *ip,
uint32_t vni)
{
uint32_t hash = 0;
hash = hash_bytes(mac, sizeof *mac, hash);
hash = hash_add_in6_addr(hash, ip);
hash = hash_add(hash, vni);
return hash_finish(hash, 26);
}
|
