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
|
/*
* Copyright 2015 Open Networking Laboratory
*
* 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.
*/
package org.onosproject.segmentrouting;
import org.onosproject.net.DeviceId;
import org.onosproject.net.Link;
import org.onosproject.net.link.LinkService;
import org.onosproject.segmentrouting.config.DeviceConfiguration;
import org.onosproject.segmentrouting.grouphandler.DefaultGroupHandler;
import org.onosproject.segmentrouting.grouphandler.NeighborSet;
import org.onosproject.store.service.EventuallyConsistentMap;
import org.slf4j.Logger;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import static org.slf4j.LoggerFactory.getLogger;
/**
* Tunnel Handler.
*/
public class TunnelHandler {
protected final Logger log = getLogger(getClass());
private final DeviceConfiguration config;
private final EventuallyConsistentMap<String, Tunnel> tunnelStore;
private Map<DeviceId, DefaultGroupHandler> groupHandlerMap;
private LinkService linkService;
public enum Result {
SUCCESS,
WRONG_PATH,
TUNNEL_EXISTS,
ID_EXISTS,
TUNNEL_NOT_FOUND,
TUNNEL_IN_USE,
INTERNAL_ERROR
}
public TunnelHandler(LinkService linkService,
DeviceConfiguration deviceConfiguration,
Map<DeviceId, DefaultGroupHandler> groupHandlerMap,
EventuallyConsistentMap<String, Tunnel> tunnelStore) {
this.linkService = linkService;
this.config = deviceConfiguration;
this.groupHandlerMap = groupHandlerMap;
this.tunnelStore = tunnelStore;
}
/**
* Creates a tunnel.
*
* @param tunnel tunnel reference to create a tunnel
* @return WRONG_PATH if the tunnel path is wrong, ID_EXISTS if the tunnel ID
* exists already, TUNNEL_EXISTS if the same tunnel exists, INTERNAL_ERROR
* if the tunnel creation failed internally, SUCCESS if the tunnel is created
* successfully
*/
public Result createTunnel(Tunnel tunnel) {
if (tunnel.labelIds().isEmpty() || tunnel.labelIds().size() < 3) {
log.error("More than one router needs to specified to created a tunnel");
return Result.WRONG_PATH;
}
if (tunnelStore.containsKey(tunnel.id())) {
log.warn("The same tunnel ID exists already");
return Result.ID_EXISTS;
}
if (tunnelStore.containsValue(tunnel)) {
log.warn("The same tunnel exists already");
return Result.TUNNEL_EXISTS;
}
int groupId = createGroupsForTunnel(tunnel);
if (groupId < 0) {
log.error("Failed to create groups for the tunnel");
return Result.INTERNAL_ERROR;
}
tunnel.setGroupId(groupId);
tunnelStore.put(tunnel.id(), tunnel);
return Result.SUCCESS;
}
/**
* Removes the tunnel with the tunnel ID given.
*
* @param tunnelInfo tunnel information to delete tunnels
* @return TUNNEL_NOT_FOUND if the tunnel to remove does not exists,
* INTERNAL_ERROR if the tunnel creation failed internally, SUCCESS
* if the tunnel is created successfully.
*/
public Result removeTunnel(Tunnel tunnelInfo) {
Tunnel tunnel = tunnelStore.get(tunnelInfo.id());
if (tunnel != null) {
DeviceId deviceId = config.getDeviceId(tunnel.labelIds().get(0));
if (tunnel.isAllowedToRemoveGroup()) {
if (groupHandlerMap.get(deviceId).removeGroup(tunnel.groupId())) {
tunnelStore.remove(tunnel.id());
} else {
log.error("Failed to remove the tunnel {}", tunnelInfo.id());
return Result.INTERNAL_ERROR;
}
} else {
log.debug("The group is not removed because it is being used.");
tunnelStore.remove(tunnel.id());
}
} else {
log.error("No tunnel found for tunnel ID {}", tunnelInfo.id());
return Result.TUNNEL_NOT_FOUND;
}
return Result.SUCCESS;
}
/**
* Returns the tunnel with the tunnel ID given.
*
* @param tid Tunnel ID
* @return Tunnel reference
*/
public Tunnel getTunnel(String tid) {
return tunnelStore.get(tid);
}
/**
* Returns all tunnels.
*
* @return list of Tunnels
*/
public List<Tunnel> getTunnels() {
List<Tunnel> tunnels = new ArrayList<>();
tunnelStore.values().forEach(tunnel -> tunnels.add(
new DefaultTunnel((DefaultTunnel) tunnel)));
return tunnels;
}
private int createGroupsForTunnel(Tunnel tunnel) {
List<Integer> portNumbers;
final int groupError = -1;
DeviceId deviceId = config.getDeviceId(tunnel.labelIds().get(0));
if (deviceId == null) {
log.warn("No device found for SID {}", tunnel.labelIds().get(0));
return groupError;
} else if (groupHandlerMap.get(deviceId) == null) {
log.warn("group handler not found for {}", deviceId);
return groupError;
}
Set<DeviceId> deviceIds = new HashSet<>();
int sid = tunnel.labelIds().get(1);
if (config.isAdjacencySid(deviceId, sid)) {
portNumbers = config.getPortsForAdjacencySid(deviceId, sid);
for (Link link: linkService.getDeviceEgressLinks(deviceId)) {
for (Integer port: portNumbers) {
if (link.src().port().toLong() == port) {
deviceIds.add(link.dst().deviceId());
}
}
}
} else {
deviceIds.add(config.getDeviceId(sid));
}
NeighborSet ns = new NeighborSet(deviceIds, tunnel.labelIds().get(2));
// If the tunnel reuses any existing groups, then tunnel handler
// should not remove the group.
if (groupHandlerMap.get(deviceId).hasNextObjectiveId(ns)) {
tunnel.allowToRemoveGroup(false);
} else {
tunnel.allowToRemoveGroup(true);
}
return groupHandlerMap.get(deviceId).getNextObjectiveId(ns, null);
}
}
|
