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1/*
2 * net/tipc/net.c: TIPC network routing code
3 *
4 * Copyright (c) 1995-2006, 2014, Ericsson AB
5 * Copyright (c) 2005, 2010-2011, Wind River Systems
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the names of the copyright holders nor the names of its
17 * contributors may be used to endorse or promote products derived from
18 * this software without specific prior written permission.
19 *
20 * Alternatively, this software may be distributed under the terms of the
21 * GNU General Public License ("GPL") version 2 as published by the Free
22 * Software Foundation.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
34 * POSSIBILITY OF SUCH DAMAGE.
35 */
36
37#include "core.h"
38#include "net.h"
39#include "name_distr.h"
40#include "subscr.h"
41#include "socket.h"
42#include "node.h"
43#include "bcast.h"
44#include "netlink.h"
45#include "monitor.h"
46
47/*
48 * The TIPC locking policy is designed to ensure a very fine locking
49 * granularity, permitting complete parallel access to individual
50 * port and node/link instances. The code consists of four major
51 * locking domains, each protected with their own disjunct set of locks.
52 *
53 * 1: The bearer level.
54 * RTNL lock is used to serialize the process of configuring bearer
55 * on update side, and RCU lock is applied on read side to make
56 * bearer instance valid on both paths of message transmission and
57 * reception.
58 *
59 * 2: The node and link level.
60 * All node instances are saved into two tipc_node_list and node_htable
61 * lists. The two lists are protected by node_list_lock on write side,
62 * and they are guarded with RCU lock on read side. Especially node
63 * instance is destroyed only when TIPC module is removed, and we can
64 * confirm that there has no any user who is accessing the node at the
65 * moment. Therefore, Except for iterating the two lists within RCU
66 * protection, it's no needed to hold RCU that we access node instance
67 * in other places.
68 *
69 * In addition, all members in node structure including link instances
70 * are protected by node spin lock.
71 *
72 * 3: The transport level of the protocol.
73 * This consists of the structures port, (and its user level
74 * representations, such as user_port and tipc_sock), reference and
75 * tipc_user (port.c, reg.c, socket.c).
76 *
77 * This layer has four different locks:
78 * - The tipc_port spin_lock. This is protecting each port instance
79 * from parallel data access and removal. Since we can not place
80 * this lock in the port itself, it has been placed in the
81 * corresponding reference table entry, which has the same life
82 * cycle as the module. This entry is difficult to access from
83 * outside the TIPC core, however, so a pointer to the lock has
84 * been added in the port instance, -to be used for unlocking
85 * only.
86 * - A read/write lock to protect the reference table itself (teg.c).
87 * (Nobody is using read-only access to this, so it can just as
88 * well be changed to a spin_lock)
89 * - A spin lock to protect the registry of kernel/driver users (reg.c)
90 * - A global spin_lock (tipc_port_lock), which only task is to ensure
91 * consistency where more than one port is involved in an operation,
92 * i.e., whe a port is part of a linked list of ports.
93 * There are two such lists; 'port_list', which is used for management,
94 * and 'wait_list', which is used to queue ports during congestion.
95 *
96 * 4: The name table (name_table.c, name_distr.c, subscription.c)
97 * - There is one big read/write-lock (tipc_nametbl_lock) protecting the
98 * overall name table structure. Nothing must be added/removed to
99 * this structure without holding write access to it.
100 * - There is one local spin_lock per sub_sequence, which can be seen
101 * as a sub-domain to the tipc_nametbl_lock domain. It is used only
102 * for translation operations, and is needed because a translation
103 * steps the root of the 'publication' linked list between each lookup.
104 * This is always used within the scope of a tipc_nametbl_lock(read).
105 * - A local spin_lock protecting the queue of subscriber events.
106*/
107
108struct tipc_net_work {
109 struct work_struct work;
110 struct net *net;
111 u32 addr;
112};
113
114static void tipc_net_finalize(struct net *net, u32 addr);
115
116int tipc_net_init(struct net *net, u8 *node_id, u32 addr)
117{
118 if (tipc_own_id(net)) {
119 pr_info("Cannot configure node identity twice\n");
120 return -1;
121 }
122 pr_info("Started in network mode\n");
123
124 if (node_id)
125 tipc_set_node_id(net, node_id);
126 if (addr)
127 tipc_net_finalize(net, addr);
128 return 0;
129}
130
131static void tipc_net_finalize(struct net *net, u32 addr)
132{
133 struct tipc_net *tn = tipc_net(net);
134
135 if (cmpxchg(&tn->node_addr, 0, addr))
136 return;
137 tipc_set_node_addr(net, addr);
138 tipc_named_reinit(net);
139 tipc_sk_reinit(net);
140 tipc_mon_reinit_self(net);
141 tipc_nametbl_publish(net, TIPC_CFG_SRV, addr, addr,
142 TIPC_CLUSTER_SCOPE, 0, addr);
143}
144
145static void tipc_net_finalize_work(struct work_struct *work)
146{
147 struct tipc_net_work *fwork;
148
149 fwork = container_of(work, struct tipc_net_work, work);
150 tipc_net_finalize(fwork->net, fwork->addr);
151 kfree(fwork);
152}
153
154void tipc_sched_net_finalize(struct net *net, u32 addr)
155{
156 struct tipc_net_work *fwork = kzalloc(sizeof(*fwork), GFP_ATOMIC);
157
158 if (!fwork)
159 return;
160 INIT_WORK(&fwork->work, tipc_net_finalize_work);
161 fwork->net = net;
162 fwork->addr = addr;
163 schedule_work(&fwork->work);
164}
165
166void tipc_net_stop(struct net *net)
167{
168 if (!tipc_own_id(net))
169 return;
170
171 rtnl_lock();
172 tipc_bearer_stop(net);
173 tipc_node_stop(net);
174 rtnl_unlock();
175
176 pr_info("Left network mode\n");
177}
178
179static int __tipc_nl_add_net(struct net *net, struct tipc_nl_msg *msg)
180{
181 struct tipc_net *tn = net_generic(net, tipc_net_id);
182 u64 *w0 = (u64 *)&tn->node_id[0];
183 u64 *w1 = (u64 *)&tn->node_id[8];
184 struct nlattr *attrs;
185 void *hdr;
186
187 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
188 NLM_F_MULTI, TIPC_NL_NET_GET);
189 if (!hdr)
190 return -EMSGSIZE;
191
192 attrs = nla_nest_start_noflag(msg->skb, TIPC_NLA_NET);
193 if (!attrs)
194 goto msg_full;
195
196 if (nla_put_u32(msg->skb, TIPC_NLA_NET_ID, tn->net_id))
197 goto attr_msg_full;
198 if (nla_put_u64_64bit(msg->skb, TIPC_NLA_NET_NODEID, *w0, 0))
199 goto attr_msg_full;
200 if (nla_put_u64_64bit(msg->skb, TIPC_NLA_NET_NODEID_W1, *w1, 0))
201 goto attr_msg_full;
202 nla_nest_end(msg->skb, attrs);
203 genlmsg_end(msg->skb, hdr);
204
205 return 0;
206
207attr_msg_full:
208 nla_nest_cancel(msg->skb, attrs);
209msg_full:
210 genlmsg_cancel(msg->skb, hdr);
211
212 return -EMSGSIZE;
213}
214
215int tipc_nl_net_dump(struct sk_buff *skb, struct netlink_callback *cb)
216{
217 struct net *net = sock_net(skb->sk);
218 int err;
219 int done = cb->args[0];
220 struct tipc_nl_msg msg;
221
222 if (done)
223 return 0;
224
225 msg.skb = skb;
226 msg.portid = NETLINK_CB(cb->skb).portid;
227 msg.seq = cb->nlh->nlmsg_seq;
228
229 err = __tipc_nl_add_net(net, &msg);
230 if (err)
231 goto out;
232
233 done = 1;
234out:
235 cb->args[0] = done;
236
237 return skb->len;
238}
239
240int __tipc_nl_net_set(struct sk_buff *skb, struct genl_info *info)
241{
242 struct nlattr *attrs[TIPC_NLA_NET_MAX + 1];
243 struct net *net = sock_net(skb->sk);
244 struct tipc_net *tn = tipc_net(net);
245 int err;
246
247 if (!info->attrs[TIPC_NLA_NET])
248 return -EINVAL;
249
250 err = nla_parse_nested_deprecated(attrs, TIPC_NLA_NET_MAX,
251 info->attrs[TIPC_NLA_NET],
252 tipc_nl_net_policy, info->extack);
253
254 if (err)
255 return err;
256
257 /* Can't change net id once TIPC has joined a network */
258 if (tipc_own_addr(net))
259 return -EPERM;
260
261 if (attrs[TIPC_NLA_NET_ID]) {
262 u32 val;
263
264 val = nla_get_u32(attrs[TIPC_NLA_NET_ID]);
265 if (val < 1 || val > 9999)
266 return -EINVAL;
267
268 tn->net_id = val;
269 }
270
271 if (attrs[TIPC_NLA_NET_ADDR]) {
272 u32 addr;
273
274 addr = nla_get_u32(attrs[TIPC_NLA_NET_ADDR]);
275 if (!addr)
276 return -EINVAL;
277 tn->legacy_addr_format = true;
278 tipc_net_init(net, NULL, addr);
279 }
280
281 if (attrs[TIPC_NLA_NET_NODEID]) {
282 u8 node_id[NODE_ID_LEN];
283 u64 *w0 = (u64 *)&node_id[0];
284 u64 *w1 = (u64 *)&node_id[8];
285
286 if (!attrs[TIPC_NLA_NET_NODEID_W1])
287 return -EINVAL;
288 *w0 = nla_get_u64(attrs[TIPC_NLA_NET_NODEID]);
289 *w1 = nla_get_u64(attrs[TIPC_NLA_NET_NODEID_W1]);
290 tipc_net_init(net, node_id, 0);
291 }
292 return 0;
293}
294
295int tipc_nl_net_set(struct sk_buff *skb, struct genl_info *info)
296{
297 int err;
298
299 rtnl_lock();
300 err = __tipc_nl_net_set(skb, info);
301 rtnl_unlock();
302
303 return err;
304}
305
306static int __tipc_nl_addr_legacy_get(struct net *net, struct tipc_nl_msg *msg)
307{
308 struct tipc_net *tn = tipc_net(net);
309 struct nlattr *attrs;
310 void *hdr;
311
312 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
313 0, TIPC_NL_ADDR_LEGACY_GET);
314 if (!hdr)
315 return -EMSGSIZE;
316
317 attrs = nla_nest_start(msg->skb, TIPC_NLA_NET);
318 if (!attrs)
319 goto msg_full;
320
321 if (tn->legacy_addr_format)
322 if (nla_put_flag(msg->skb, TIPC_NLA_NET_ADDR_LEGACY))
323 goto attr_msg_full;
324
325 nla_nest_end(msg->skb, attrs);
326 genlmsg_end(msg->skb, hdr);
327
328 return 0;
329
330attr_msg_full:
331 nla_nest_cancel(msg->skb, attrs);
332msg_full:
333 genlmsg_cancel(msg->skb, hdr);
334
335 return -EMSGSIZE;
336}
337
338int tipc_nl_net_addr_legacy_get(struct sk_buff *skb, struct genl_info *info)
339{
340 struct net *net = sock_net(skb->sk);
341 struct tipc_nl_msg msg;
342 struct sk_buff *rep;
343 int err;
344
345 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
346 if (!rep)
347 return -ENOMEM;
348
349 msg.skb = rep;
350 msg.portid = info->snd_portid;
351 msg.seq = info->snd_seq;
352
353 err = __tipc_nl_addr_legacy_get(net, &msg);
354 if (err) {
355 nlmsg_free(msg.skb);
356 return err;
357 }
358
359 return genlmsg_reply(msg.skb, info);
360}
1/*
2 * net/tipc/net.c: TIPC network routing code
3 *
4 * Copyright (c) 1995-2006, 2014, Ericsson AB
5 * Copyright (c) 2005, 2010-2011, Wind River Systems
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the names of the copyright holders nor the names of its
17 * contributors may be used to endorse or promote products derived from
18 * this software without specific prior written permission.
19 *
20 * Alternatively, this software may be distributed under the terms of the
21 * GNU General Public License ("GPL") version 2 as published by the Free
22 * Software Foundation.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
34 * POSSIBILITY OF SUCH DAMAGE.
35 */
36
37#include "core.h"
38#include "net.h"
39#include "name_distr.h"
40#include "subscr.h"
41#include "socket.h"
42#include "node.h"
43#include "bcast.h"
44#include "link.h"
45#include "netlink.h"
46#include "monitor.h"
47
48/*
49 * The TIPC locking policy is designed to ensure a very fine locking
50 * granularity, permitting complete parallel access to individual
51 * port and node/link instances. The code consists of four major
52 * locking domains, each protected with their own disjunct set of locks.
53 *
54 * 1: The bearer level.
55 * RTNL lock is used to serialize the process of configuring bearer
56 * on update side, and RCU lock is applied on read side to make
57 * bearer instance valid on both paths of message transmission and
58 * reception.
59 *
60 * 2: The node and link level.
61 * All node instances are saved into two tipc_node_list and node_htable
62 * lists. The two lists are protected by node_list_lock on write side,
63 * and they are guarded with RCU lock on read side. Especially node
64 * instance is destroyed only when TIPC module is removed, and we can
65 * confirm that there has no any user who is accessing the node at the
66 * moment. Therefore, Except for iterating the two lists within RCU
67 * protection, it's no needed to hold RCU that we access node instance
68 * in other places.
69 *
70 * In addition, all members in node structure including link instances
71 * are protected by node spin lock.
72 *
73 * 3: The transport level of the protocol.
74 * This consists of the structures port, (and its user level
75 * representations, such as user_port and tipc_sock), reference and
76 * tipc_user (port.c, reg.c, socket.c).
77 *
78 * This layer has four different locks:
79 * - The tipc_port spin_lock. This is protecting each port instance
80 * from parallel data access and removal. Since we can not place
81 * this lock in the port itself, it has been placed in the
82 * corresponding reference table entry, which has the same life
83 * cycle as the module. This entry is difficult to access from
84 * outside the TIPC core, however, so a pointer to the lock has
85 * been added in the port instance, -to be used for unlocking
86 * only.
87 * - A read/write lock to protect the reference table itself (teg.c).
88 * (Nobody is using read-only access to this, so it can just as
89 * well be changed to a spin_lock)
90 * - A spin lock to protect the registry of kernel/driver users (reg.c)
91 * - A global spin_lock (tipc_port_lock), which only task is to ensure
92 * consistency where more than one port is involved in an operation,
93 * i.e., when a port is part of a linked list of ports.
94 * There are two such lists; 'port_list', which is used for management,
95 * and 'wait_list', which is used to queue ports during congestion.
96 *
97 * 4: The name table (name_table.c, name_distr.c, subscription.c)
98 * - There is one big read/write-lock (tipc_nametbl_lock) protecting the
99 * overall name table structure. Nothing must be added/removed to
100 * this structure without holding write access to it.
101 * - There is one local spin_lock per sub_sequence, which can be seen
102 * as a sub-domain to the tipc_nametbl_lock domain. It is used only
103 * for translation operations, and is needed because a translation
104 * steps the root of the 'publication' linked list between each lookup.
105 * This is always used within the scope of a tipc_nametbl_lock(read).
106 * - A local spin_lock protecting the queue of subscriber events.
107*/
108
109static void tipc_net_finalize(struct net *net, u32 addr);
110
111int tipc_net_init(struct net *net, u8 *node_id, u32 addr)
112{
113 if (tipc_own_id(net)) {
114 pr_info("Cannot configure node identity twice\n");
115 return -1;
116 }
117 pr_info("Started in network mode\n");
118
119 if (node_id)
120 tipc_set_node_id(net, node_id);
121 if (addr)
122 tipc_net_finalize(net, addr);
123 return 0;
124}
125
126static void tipc_net_finalize(struct net *net, u32 addr)
127{
128 struct tipc_net *tn = tipc_net(net);
129 struct tipc_socket_addr sk = {0, addr};
130 struct tipc_uaddr ua;
131
132 tipc_uaddr(&ua, TIPC_SERVICE_RANGE, TIPC_CLUSTER_SCOPE,
133 TIPC_NODE_STATE, addr, addr);
134
135 if (cmpxchg(&tn->node_addr, 0, addr))
136 return;
137 tipc_set_node_addr(net, addr);
138 tipc_named_reinit(net);
139 tipc_sk_reinit(net);
140 tipc_mon_reinit_self(net);
141 tipc_nametbl_publish(net, &ua, &sk, addr);
142}
143
144void tipc_net_finalize_work(struct work_struct *work)
145{
146 struct tipc_net *tn = container_of(work, struct tipc_net, work);
147
148 tipc_net_finalize(tipc_link_net(tn->bcl), tn->trial_addr);
149}
150
151void tipc_net_stop(struct net *net)
152{
153 if (!tipc_own_id(net))
154 return;
155
156 rtnl_lock();
157 tipc_bearer_stop(net);
158 tipc_node_stop(net);
159 rtnl_unlock();
160
161 pr_info("Left network mode\n");
162}
163
164static int __tipc_nl_add_net(struct net *net, struct tipc_nl_msg *msg)
165{
166 struct tipc_net *tn = net_generic(net, tipc_net_id);
167 u64 *w0 = (u64 *)&tn->node_id[0];
168 u64 *w1 = (u64 *)&tn->node_id[8];
169 struct nlattr *attrs;
170 void *hdr;
171
172 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
173 NLM_F_MULTI, TIPC_NL_NET_GET);
174 if (!hdr)
175 return -EMSGSIZE;
176
177 attrs = nla_nest_start_noflag(msg->skb, TIPC_NLA_NET);
178 if (!attrs)
179 goto msg_full;
180
181 if (nla_put_u32(msg->skb, TIPC_NLA_NET_ID, tn->net_id))
182 goto attr_msg_full;
183 if (nla_put_u64_64bit(msg->skb, TIPC_NLA_NET_NODEID, *w0, 0))
184 goto attr_msg_full;
185 if (nla_put_u64_64bit(msg->skb, TIPC_NLA_NET_NODEID_W1, *w1, 0))
186 goto attr_msg_full;
187 nla_nest_end(msg->skb, attrs);
188 genlmsg_end(msg->skb, hdr);
189
190 return 0;
191
192attr_msg_full:
193 nla_nest_cancel(msg->skb, attrs);
194msg_full:
195 genlmsg_cancel(msg->skb, hdr);
196
197 return -EMSGSIZE;
198}
199
200int tipc_nl_net_dump(struct sk_buff *skb, struct netlink_callback *cb)
201{
202 struct net *net = sock_net(skb->sk);
203 int err;
204 int done = cb->args[0];
205 struct tipc_nl_msg msg;
206
207 if (done)
208 return 0;
209
210 msg.skb = skb;
211 msg.portid = NETLINK_CB(cb->skb).portid;
212 msg.seq = cb->nlh->nlmsg_seq;
213
214 err = __tipc_nl_add_net(net, &msg);
215 if (err)
216 goto out;
217
218 done = 1;
219out:
220 cb->args[0] = done;
221
222 return skb->len;
223}
224
225int __tipc_nl_net_set(struct sk_buff *skb, struct genl_info *info)
226{
227 struct nlattr *attrs[TIPC_NLA_NET_MAX + 1];
228 struct net *net = sock_net(skb->sk);
229 struct tipc_net *tn = tipc_net(net);
230 int err;
231
232 if (!info->attrs[TIPC_NLA_NET])
233 return -EINVAL;
234
235 err = nla_parse_nested_deprecated(attrs, TIPC_NLA_NET_MAX,
236 info->attrs[TIPC_NLA_NET],
237 tipc_nl_net_policy, info->extack);
238
239 if (err)
240 return err;
241
242 /* Can't change net id once TIPC has joined a network */
243 if (tipc_own_addr(net))
244 return -EPERM;
245
246 if (attrs[TIPC_NLA_NET_ID]) {
247 u32 val;
248
249 val = nla_get_u32(attrs[TIPC_NLA_NET_ID]);
250 if (val < 1 || val > 9999)
251 return -EINVAL;
252
253 tn->net_id = val;
254 }
255
256 if (attrs[TIPC_NLA_NET_ADDR]) {
257 u32 addr;
258
259 addr = nla_get_u32(attrs[TIPC_NLA_NET_ADDR]);
260 if (!addr)
261 return -EINVAL;
262 tn->legacy_addr_format = true;
263 tipc_net_init(net, NULL, addr);
264 }
265
266 if (attrs[TIPC_NLA_NET_NODEID]) {
267 u8 node_id[NODE_ID_LEN];
268 u64 *w0 = (u64 *)&node_id[0];
269 u64 *w1 = (u64 *)&node_id[8];
270
271 if (!attrs[TIPC_NLA_NET_NODEID_W1])
272 return -EINVAL;
273 *w0 = nla_get_u64(attrs[TIPC_NLA_NET_NODEID]);
274 *w1 = nla_get_u64(attrs[TIPC_NLA_NET_NODEID_W1]);
275 tipc_net_init(net, node_id, 0);
276 }
277 return 0;
278}
279
280int tipc_nl_net_set(struct sk_buff *skb, struct genl_info *info)
281{
282 int err;
283
284 rtnl_lock();
285 err = __tipc_nl_net_set(skb, info);
286 rtnl_unlock();
287
288 return err;
289}
290
291static int __tipc_nl_addr_legacy_get(struct net *net, struct tipc_nl_msg *msg)
292{
293 struct tipc_net *tn = tipc_net(net);
294 struct nlattr *attrs;
295 void *hdr;
296
297 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
298 0, TIPC_NL_ADDR_LEGACY_GET);
299 if (!hdr)
300 return -EMSGSIZE;
301
302 attrs = nla_nest_start(msg->skb, TIPC_NLA_NET);
303 if (!attrs)
304 goto msg_full;
305
306 if (tn->legacy_addr_format)
307 if (nla_put_flag(msg->skb, TIPC_NLA_NET_ADDR_LEGACY))
308 goto attr_msg_full;
309
310 nla_nest_end(msg->skb, attrs);
311 genlmsg_end(msg->skb, hdr);
312
313 return 0;
314
315attr_msg_full:
316 nla_nest_cancel(msg->skb, attrs);
317msg_full:
318 genlmsg_cancel(msg->skb, hdr);
319
320 return -EMSGSIZE;
321}
322
323int tipc_nl_net_addr_legacy_get(struct sk_buff *skb, struct genl_info *info)
324{
325 struct net *net = sock_net(skb->sk);
326 struct tipc_nl_msg msg;
327 struct sk_buff *rep;
328 int err;
329
330 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
331 if (!rep)
332 return -ENOMEM;
333
334 msg.skb = rep;
335 msg.portid = info->snd_portid;
336 msg.seq = info->snd_seq;
337
338 err = __tipc_nl_addr_legacy_get(net, &msg);
339 if (err) {
340 nlmsg_free(msg.skb);
341 return err;
342 }
343
344 return genlmsg_reply(msg.skb, info);
345}