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
|
/* Copyright (c) 2017, 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 "gchassis.h"
#include "lport.h"
#include "lib/sset.h"
#include "openvswitch/vlog.h"
#include "ovn/lib/chassis-index.h"
#include "ovn/lib/ovn-sb-idl.h"
VLOG_DEFINE_THIS_MODULE(gchassis);
/* gateway_chassis ordering
*/
static int
compare_chassis_prio_(const void *a_, const void *b_)
{
const struct gateway_chassis *gc_a = a_;
const struct gateway_chassis *gc_b = b_;
int prio_diff = gc_b->db->priority - gc_a->db->priority;
if (!prio_diff) {
return strcmp(gc_b->db->name, gc_a->db->name);
}
return prio_diff;
}
struct ovs_list*
gateway_chassis_get_ordered(struct ovsdb_idl_index *sbrec_chassis_by_name,
const struct sbrec_port_binding *binding)
{
const char *redir_chassis_str;
const struct sbrec_chassis *redirect_chassis = NULL;
/* XXX: redirect-chassis SBDB option handling is supported for backwards
* compatibility with N-1 version of ovn-northd. This support can
* be removed in OVS 2.9 where Gateway_Chassis list on the port binding
* will always be populated by northd */
redir_chassis_str = smap_get(&binding->options, "redirect-chassis");
if (redir_chassis_str) {
redirect_chassis = chassis_lookup_by_name(sbrec_chassis_by_name,
redir_chassis_str);
if (!redirect_chassis) {
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
VLOG_WARN_RL(&rl, "chassis name (%s) in redirect-chassis option "
"of logical port %s not known",
redir_chassis_str, binding->logical_port);
}
}
if (!redirect_chassis && binding->n_gateway_chassis == 0) {
return NULL;
}
struct gateway_chassis *gateway_chassis = NULL;
int n = 0;
if (binding->n_gateway_chassis) {
gateway_chassis = xmalloc(sizeof *gateway_chassis *
binding->n_gateway_chassis);
for (n = 0; n < binding->n_gateway_chassis; n++) {
gateway_chassis[n].db = binding->gateway_chassis[n];
gateway_chassis[n].virtual_gwc = false;
}
qsort(gateway_chassis, n, sizeof *gateway_chassis,
compare_chassis_prio_);
} else if (redirect_chassis) {
/* When only redirect_chassis is available, return a single
* virtual entry that it's not on OVSDB, this way the code
* handling the returned list will be uniform, regardless
* of gateway_chassis being populated or redirect-chassis option
* being used */
gateway_chassis = xmalloc(sizeof *gateway_chassis);
struct sbrec_gateway_chassis *gwc =
xzalloc(sizeof *gateway_chassis->db);
sbrec_gateway_chassis_init(gwc);
gwc->name = xasprintf("%s_%s", binding->logical_port,
redirect_chassis->name);
gwc->chassis = CONST_CAST(struct sbrec_chassis *, redirect_chassis);
gateway_chassis->db = gwc;
gateway_chassis->virtual_gwc = true;
n++;
}
struct ovs_list *list = NULL;
if (n) {
list = xmalloc(sizeof *list);
ovs_list_init(list);
int i;
for (i = 0; i < n; i++) {
ovs_list_push_back(list, &gateway_chassis[i].node);
}
}
return list;
}
bool
gateway_chassis_contains(const struct ovs_list *gateway_chassis,
const struct sbrec_chassis *chassis) {
struct gateway_chassis *chassis_item;
if (gateway_chassis) {
LIST_FOR_EACH (chassis_item, node, gateway_chassis) {
if (chassis_item->db->chassis
&& !strcmp(chassis_item->db->chassis->name, chassis->name)) {
return true;
}
}
}
return false;
}
void
gateway_chassis_destroy(struct ovs_list *list)
{
if (!list) {
return;
}
/* XXX: This loop is for backwards compatibility with redirect-chassis
* which we insert as a single virtual Gateway_Chassis on the ordered
* list */
struct gateway_chassis *chassis_item;
LIST_FOR_EACH (chassis_item, node, list) {
if (chassis_item->virtual_gwc) {
free(chassis_item->db->name);
free(CONST_CAST(struct sbrec_gateway_chassis *, chassis_item->db));
}
}
free(ovs_list_front(list));
free(list);
}
bool
gateway_chassis_in_pb_contains(const struct sbrec_port_binding *binding,
const struct sbrec_chassis *chassis)
{
if (!binding || !chassis) {
return false;
}
/* XXX: redirect-chassis handling for backwards compatibility,
* with older ovs-northd during upgrade phase, can be removed
* for OVS 2.9 */
const char *redirect_chassis = smap_get(&binding->options,
"redirect-chassis");
if (binding->n_gateway_chassis) {
int n;
for (n = 0; n < binding->n_gateway_chassis; n++) {
if (binding->gateway_chassis[n]->chassis
&& !strcmp(binding->gateway_chassis[n]->chassis->name,
chassis->name)) {
return true;
}
}
} else if (redirect_chassis) {
return !strcmp(redirect_chassis, chassis->name);
}
return false;
}
bool
gateway_chassis_is_active(const struct ovs_list *gateway_chassis,
const struct sbrec_chassis *local_chassis,
const struct sset *active_tunnels)
{
struct gateway_chassis *gwc;
if (!gateway_chassis
|| (gateway_chassis && ovs_list_is_empty(gateway_chassis))) {
return false;
}
/* if there's only one chassis, and local chassis is on the list
* it's not HA and it's the equivalent of being active */
if (ovs_list_is_singleton(gateway_chassis) &&
gateway_chassis_contains(gateway_chassis, local_chassis)) {
return true;
}
/* if there are no other tunnels active, we assume that the
* connection providing tunneling is down, hence we're down */
if (sset_is_empty(active_tunnels)) {
return false;
}
/* gateway_chassis is an ordered list, by priority, of chassis
* hosting the redirect of the port */
LIST_FOR_EACH (gwc, node, gateway_chassis) {
if (!gwc->db->chassis) {
continue;
}
/* if we found the chassis on the list, and we didn't exit before
* on the active_tunnels check for other higher priority chassis
* being active, then this chassis is master. */
if (!strcmp(gwc->db->chassis->name, local_chassis->name)) {
return true;
}
/* if we find this specific chassis on the list to have an active
* tunnel, then 'local_chassis' is not master */
if (sset_contains(active_tunnels, gwc->db->chassis->name)) {
return false;
}
}
return false;
}
|
