1 /* 1 /*
2 * net/tipc/subscr.c: TIPC network topology se 2 * net/tipc/subscr.c: TIPC network topology service
3 * 3 *
4 * Copyright (c) 2000-2017, Ericsson AB !! 4 * Copyright (c) 2000-2006, Ericsson AB
5 * Copyright (c) 2005-2007, 2010-2013, Wind Ri 5 * Copyright (c) 2005-2007, 2010-2013, Wind River Systems
6 * Copyright (c) 2020-2021, Red Hat Inc <<
7 * All rights reserved. 6 * All rights reserved.
8 * 7 *
9 * Redistribution and use in source and binary 8 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that t 9 * modification, are permitted provided that the following conditions are met:
11 * 10 *
12 * 1. Redistributions of source code must reta 11 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the 12 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must repr 13 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the 14 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials pro 15 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the names of the copyright holde 16 * 3. Neither the names of the copyright holders nor the names of its
18 * contributors may be used to endorse or p 17 * contributors may be used to endorse or promote products derived from
19 * this software without specific prior wri 18 * this software without specific prior written permission.
20 * 19 *
21 * Alternatively, this software may be distrib 20 * Alternatively, this software may be distributed under the terms of the
22 * GNU General Public License ("GPL") version 21 * GNU General Public License ("GPL") version 2 as published by the Free
23 * Software Foundation. 22 * Software Foundation.
24 * 23 *
25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT 24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
26 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCL 25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND F 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYR 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
29 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL 28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT L 29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THE 31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUD 32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS S 33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE. 34 * POSSIBILITY OF SUCH DAMAGE.
36 */ 35 */
37 36
38 #include "core.h" 37 #include "core.h"
39 #include "name_table.h" 38 #include "name_table.h"
40 #include "subscr.h" 39 #include "subscr.h"
41 40
42 static void tipc_sub_send_event(struct tipc_su !! 41 /**
43 struct publica !! 42 * struct tipc_subscriber - TIPC network topology subscriber
44 u32 event) !! 43 * @kref: reference counter to tipc_subscription object
>> 44 * @conid: connection identifier to server connecting to subscriber
>> 45 * @lock: control access to subscriber
>> 46 * @subscrp_list: list of subscription objects for this subscriber
>> 47 */
>> 48 struct tipc_subscriber {
>> 49 struct kref kref;
>> 50 int conid;
>> 51 spinlock_t lock;
>> 52 struct list_head subscrp_list;
>> 53 };
>> 54
>> 55 static void tipc_subscrp_delete(struct tipc_subscription *sub);
>> 56 static void tipc_subscrb_put(struct tipc_subscriber *subscriber);
>> 57 static void tipc_subscrp_put(struct tipc_subscription *subscription);
>> 58 static void tipc_subscrp_get(struct tipc_subscription *subscription);
>> 59
>> 60 /**
>> 61 * htohl - convert value to endianness used by destination
>> 62 * @in: value to convert
>> 63 * @swap: non-zero if endianness must be reversed
>> 64 *
>> 65 * Returns converted value
>> 66 */
>> 67 static u32 htohl(u32 in, int swap)
45 { 68 {
46 struct tipc_subscr *s = &sub->evt.s; !! 69 return swap ? swab32(in) : in;
47 struct tipc_event *evt = &sub->evt; !! 70 }
48 71
49 if (sub->inactive) !! 72 static void tipc_subscrp_send_event(struct tipc_subscription *sub,
50 return; !! 73 u32 found_lower, u32 found_upper,
51 tipc_evt_write(evt, event, event); !! 74 u32 event, u32 port_ref, u32 node)
52 if (p) { !! 75 {
53 tipc_evt_write(evt, found_lowe !! 76 struct tipc_net *tn = net_generic(sub->net, tipc_net_id);
54 tipc_evt_write(evt, found_uppe !! 77 struct tipc_subscriber *subscriber = sub->subscriber;
55 tipc_evt_write(evt, port.ref, !! 78 struct kvec msg_sect;
56 tipc_evt_write(evt, port.node, !! 79
57 } else { !! 80 msg_sect.iov_base = (void *)&sub->evt;
58 tipc_evt_write(evt, found_lowe !! 81 msg_sect.iov_len = sizeof(struct tipc_event);
59 tipc_evt_write(evt, found_uppe !! 82 sub->evt.event = htohl(event, sub->swap);
60 tipc_evt_write(evt, port.ref, !! 83 sub->evt.found_lower = htohl(found_lower, sub->swap);
61 tipc_evt_write(evt, port.node, !! 84 sub->evt.found_upper = htohl(found_upper, sub->swap);
62 } !! 85 sub->evt.port.ref = htohl(port_ref, sub->swap);
63 tipc_topsrv_queue_evt(sub->net, sub->c !! 86 sub->evt.port.node = htohl(node, sub->swap);
>> 87 tipc_conn_sendmsg(tn->topsrv, subscriber->conid, NULL,
>> 88 msg_sect.iov_base, msg_sect.iov_len);
64 } 89 }
65 90
66 /** 91 /**
67 * tipc_sub_check_overlap - test for subscript !! 92 * tipc_subscrp_check_overlap - test for subscription overlap with the
68 * @subscribed: the service range subscribed f !! 93 * given values
69 * @found: the service range we are checking f <<
70 * 94 *
71 * Returns true if there is overlap, otherwise !! 95 * Returns 1 if there is overlap, otherwise 0.
72 */ 96 */
73 static bool tipc_sub_check_overlap(struct tipc !! 97 int tipc_subscrp_check_overlap(struct tipc_name_seq *seq, u32 found_lower,
74 struct tipc !! 98 u32 found_upper)
75 { 99 {
76 u32 found_lower = found->lower; !! 100 if (found_lower < seq->lower)
77 u32 found_upper = found->upper; !! 101 found_lower = seq->lower;
>> 102 if (found_upper > seq->upper)
>> 103 found_upper = seq->upper;
>> 104 if (found_lower > found_upper)
>> 105 return 0;
>> 106 return 1;
>> 107 }
78 108
79 if (found_lower < subscribed->lower) !! 109 u32 tipc_subscrp_convert_seq_type(u32 type, int swap)
80 found_lower = subscribed->lowe !! 110 {
81 if (found_upper > subscribed->upper) !! 111 return htohl(type, swap);
82 found_upper = subscribed->uppe <<
83 return found_lower <= found_upper; <<
84 } 112 }
85 113
86 void tipc_sub_report_overlap(struct tipc_subsc !! 114 void tipc_subscrp_convert_seq(struct tipc_name_seq *in, int swap,
87 struct publicatio !! 115 struct tipc_name_seq *out)
88 u32 event, bool m <<
89 { 116 {
90 struct tipc_service_range *sr = &sub-> !! 117 out->type = htohl(in->type, swap);
91 u32 filter = sub->s.filter; !! 118 out->lower = htohl(in->lower, swap);
>> 119 out->upper = htohl(in->upper, swap);
>> 120 }
92 121
93 if (!tipc_sub_check_overlap(sr, &p->sr !! 122 void tipc_subscrp_report_overlap(struct tipc_subscription *sub, u32 found_lower,
94 return; !! 123 u32 found_upper, u32 event, u32 port_ref,
95 if (!must && !(filter & TIPC_SUB_PORTS !! 124 u32 node, int must)
96 return; !! 125 {
97 if (filter & TIPC_SUB_CLUSTER_SCOPE && !! 126 struct tipc_name_seq seq;
>> 127
>> 128 tipc_subscrp_get(sub);
>> 129 tipc_subscrp_convert_seq(&sub->evt.s.seq, sub->swap, &seq);
>> 130 if (!tipc_subscrp_check_overlap(&seq, found_lower, found_upper))
98 return; 131 return;
99 if (filter & TIPC_SUB_NODE_SCOPE && p- !! 132 if (!must &&
>> 133 !(htohl(sub->evt.s.filter, sub->swap) & TIPC_SUB_PORTS))
100 return; 134 return;
101 spin_lock(&sub->lock); !! 135
102 tipc_sub_send_event(sub, p, event); !! 136 tipc_subscrp_send_event(sub, found_lower, found_upper, event, port_ref,
103 spin_unlock(&sub->lock); !! 137 node);
>> 138 tipc_subscrp_put(sub);
104 } 139 }
105 140
106 static void tipc_sub_timeout(struct timer_list !! 141 static void tipc_subscrp_timeout(unsigned long data)
107 { 142 {
108 struct tipc_subscription *sub = from_t !! 143 struct tipc_subscription *sub = (struct tipc_subscription *)data;
>> 144 struct tipc_subscriber *subscriber = sub->subscriber;
>> 145
>> 146 spin_lock_bh(&subscriber->lock);
>> 147 tipc_nametbl_unsubscribe(sub);
>> 148 spin_unlock_bh(&subscriber->lock);
>> 149
>> 150 /* Notify subscriber of timeout */
>> 151 tipc_subscrp_send_event(sub, sub->evt.s.seq.lower, sub->evt.s.seq.upper,
>> 152 TIPC_SUBSCR_TIMEOUT, 0, 0);
>> 153
>> 154 tipc_subscrp_put(sub);
>> 155 }
109 156
110 spin_lock(&sub->lock); !! 157 static void tipc_subscrb_kref_release(struct kref *kref)
111 tipc_sub_send_event(sub, NULL, TIPC_SU !! 158 {
112 sub->inactive = true; !! 159 kfree(container_of(kref,struct tipc_subscriber, kref));
113 spin_unlock(&sub->lock); <<
114 } 160 }
115 161
116 static void tipc_sub_kref_release(struct kref !! 162 static void tipc_subscrb_put(struct tipc_subscriber *subscriber)
117 { 163 {
118 kfree(container_of(kref, struct tipc_s !! 164 kref_put(&subscriber->kref, tipc_subscrb_kref_release);
119 } 165 }
120 166
121 void tipc_sub_put(struct tipc_subscription *su !! 167 static void tipc_subscrb_get(struct tipc_subscriber *subscriber)
122 { 168 {
123 kref_put(&subscription->kref, tipc_sub !! 169 kref_get(&subscriber->kref);
124 } 170 }
125 171
126 void tipc_sub_get(struct tipc_subscription *su !! 172 static void tipc_subscrp_kref_release(struct kref *kref)
>> 173 {
>> 174 struct tipc_subscription *sub = container_of(kref,
>> 175 struct tipc_subscription,
>> 176 kref);
>> 177 struct tipc_net *tn = net_generic(sub->net, tipc_net_id);
>> 178 struct tipc_subscriber *subscriber = sub->subscriber;
>> 179
>> 180 spin_lock_bh(&subscriber->lock);
>> 181 list_del(&sub->subscrp_list);
>> 182 atomic_dec(&tn->subscription_count);
>> 183 spin_unlock_bh(&subscriber->lock);
>> 184 kfree(sub);
>> 185 tipc_subscrb_put(subscriber);
>> 186 }
>> 187
>> 188 static void tipc_subscrp_put(struct tipc_subscription *subscription)
>> 189 {
>> 190 kref_put(&subscription->kref, tipc_subscrp_kref_release);
>> 191 }
>> 192
>> 193 static void tipc_subscrp_get(struct tipc_subscription *subscription)
127 { 194 {
128 kref_get(&subscription->kref); 195 kref_get(&subscription->kref);
129 } 196 }
130 197
131 struct tipc_subscription *tipc_sub_subscribe(s !! 198 /* tipc_subscrb_subscrp_delete - delete a specific subscription or all
132 s !! 199 * subscriptions for a given subscriber.
133 i !! 200 */
134 { !! 201 static void tipc_subscrb_subscrp_delete(struct tipc_subscriber *subscriber,
135 u32 lower = tipc_sub_read(s, seq.lower !! 202 struct tipc_subscr *s)
136 u32 upper = tipc_sub_read(s, seq.upper !! 203 {
137 u32 filter = tipc_sub_read(s, filter); !! 204 struct list_head *subscription_list = &subscriber->subscrp_list;
>> 205 struct tipc_subscription *sub, *temp;
>> 206
>> 207 spin_lock_bh(&subscriber->lock);
>> 208 list_for_each_entry_safe(sub, temp, subscription_list, subscrp_list) {
>> 209 if (s && memcmp(s, &sub->evt.s, sizeof(struct tipc_subscr)))
>> 210 continue;
>> 211
>> 212 tipc_nametbl_unsubscribe(sub);
>> 213 tipc_subscrp_get(sub);
>> 214 spin_unlock_bh(&subscriber->lock);
>> 215 tipc_subscrp_delete(sub);
>> 216 tipc_subscrp_put(sub);
>> 217 spin_lock_bh(&subscriber->lock);
>> 218
>> 219 if (s)
>> 220 break;
>> 221 }
>> 222 spin_unlock_bh(&subscriber->lock);
>> 223 }
>> 224
>> 225 static struct tipc_subscriber *tipc_subscrb_create(int conid)
>> 226 {
>> 227 struct tipc_subscriber *subscriber;
>> 228
>> 229 subscriber = kzalloc(sizeof(*subscriber), GFP_ATOMIC);
>> 230 if (!subscriber) {
>> 231 pr_warn("Subscriber rejected, no memory\n");
>> 232 return NULL;
>> 233 }
>> 234 INIT_LIST_HEAD(&subscriber->subscrp_list);
>> 235 kref_init(&subscriber->kref);
>> 236 subscriber->conid = conid;
>> 237 spin_lock_init(&subscriber->lock);
>> 238
>> 239 return subscriber;
>> 240 }
>> 241
>> 242 static void tipc_subscrb_delete(struct tipc_subscriber *subscriber)
>> 243 {
>> 244 tipc_subscrb_subscrp_delete(subscriber, NULL);
>> 245 tipc_subscrb_put(subscriber);
>> 246 }
>> 247
>> 248 static void tipc_subscrp_delete(struct tipc_subscription *sub)
>> 249 {
>> 250 u32 timeout = htohl(sub->evt.s.timeout, sub->swap);
>> 251
>> 252 if (timeout == TIPC_WAIT_FOREVER || del_timer(&sub->timer))
>> 253 tipc_subscrp_put(sub);
>> 254 }
>> 255
>> 256 static void tipc_subscrp_cancel(struct tipc_subscr *s,
>> 257 struct tipc_subscriber *subscriber)
>> 258 {
>> 259 tipc_subscrb_get(subscriber);
>> 260 tipc_subscrb_subscrp_delete(subscriber, s);
>> 261 tipc_subscrb_put(subscriber);
>> 262 }
>> 263
>> 264 static struct tipc_subscription *tipc_subscrp_create(struct net *net,
>> 265 struct tipc_subscr *s,
>> 266 int swap)
>> 267 {
>> 268 struct tipc_net *tn = net_generic(net, tipc_net_id);
138 struct tipc_subscription *sub; 269 struct tipc_subscription *sub;
139 u32 timeout; !! 270 u32 filter = htohl(s->filter, swap);
140 271
141 if ((filter & TIPC_SUB_PORTS && filter !! 272 /* Refuse subscription if global limit exceeded */
142 lower > upper) { !! 273 if (atomic_read(&tn->subscription_count) >= TIPC_MAX_SUBSCRIPTIONS) {
143 pr_warn("Subscription rejected !! 274 pr_warn("Subscription rejected, limit reached (%u)\n",
>> 275 TIPC_MAX_SUBSCRIPTIONS);
144 return NULL; 276 return NULL;
145 } 277 }
>> 278
>> 279 /* Allocate subscription object */
146 sub = kmalloc(sizeof(*sub), GFP_ATOMIC 280 sub = kmalloc(sizeof(*sub), GFP_ATOMIC);
147 if (!sub) { 281 if (!sub) {
148 pr_warn("Subscription rejected 282 pr_warn("Subscription rejected, no memory\n");
149 return NULL; 283 return NULL;
150 } 284 }
151 INIT_LIST_HEAD(&sub->service_list); !! 285
152 INIT_LIST_HEAD(&sub->sub_list); !! 286 /* Initialize subscription object */
153 sub->net = net; 287 sub->net = net;
154 sub->conid = conid; !! 288 if (((filter & TIPC_SUB_PORTS) && (filter & TIPC_SUB_SERVICE)) ||
155 sub->inactive = false; !! 289 (htohl(s->seq.lower, swap) > htohl(s->seq.upper, swap))) {
156 memcpy(&sub->evt.s, s, sizeof(*s)); !! 290 pr_warn("Subscription rejected, illegal request\n");
157 sub->s.seq.type = tipc_sub_read(s, seq <<
158 sub->s.seq.lower = lower; <<
159 sub->s.seq.upper = upper; <<
160 sub->s.filter = filter; <<
161 sub->s.timeout = tipc_sub_read(s, time <<
162 memcpy(sub->s.usr_handle, s->usr_handl <<
163 spin_lock_init(&sub->lock); <<
164 kref_init(&sub->kref); <<
165 if (!tipc_nametbl_subscribe(sub)) { <<
166 kfree(sub); 291 kfree(sub);
167 return NULL; 292 return NULL;
168 } 293 }
169 timer_setup(&sub->timer, tipc_sub_time !! 294
170 timeout = tipc_sub_read(&sub->evt.s, t !! 295 sub->swap = swap;
>> 296 memcpy(&sub->evt.s, s, sizeof(*s));
>> 297 atomic_inc(&tn->subscription_count);
>> 298 kref_init(&sub->kref);
>> 299 return sub;
>> 300 }
>> 301
>> 302 static void tipc_subscrp_subscribe(struct net *net, struct tipc_subscr *s,
>> 303 struct tipc_subscriber *subscriber, int swap)
>> 304 {
>> 305 struct tipc_net *tn = net_generic(net, tipc_net_id);
>> 306 struct tipc_subscription *sub = NULL;
>> 307 u32 timeout;
>> 308
>> 309 sub = tipc_subscrp_create(net, s, swap);
>> 310 if (!sub)
>> 311 return tipc_conn_terminate(tn->topsrv, subscriber->conid);
>> 312
>> 313 spin_lock_bh(&subscriber->lock);
>> 314 list_add(&sub->subscrp_list, &subscriber->subscrp_list);
>> 315 sub->subscriber = subscriber;
>> 316 tipc_nametbl_subscribe(sub);
>> 317 tipc_subscrb_get(subscriber);
>> 318 spin_unlock_bh(&subscriber->lock);
>> 319
>> 320 setup_timer(&sub->timer, tipc_subscrp_timeout, (unsigned long)sub);
>> 321 timeout = htohl(sub->evt.s.timeout, swap);
>> 322
171 if (timeout != TIPC_WAIT_FOREVER) 323 if (timeout != TIPC_WAIT_FOREVER)
172 mod_timer(&sub->timer, jiffies 324 mod_timer(&sub->timer, jiffies + msecs_to_jiffies(timeout));
173 return sub; <<
174 } 325 }
175 326
176 void tipc_sub_unsubscribe(struct tipc_subscrip !! 327 /* Handle one termination request for the subscriber */
>> 328 static void tipc_subscrb_release_cb(int conid, void *usr_data)
177 { 329 {
178 tipc_nametbl_unsubscribe(sub); !! 330 tipc_subscrb_delete((struct tipc_subscriber *)usr_data);
179 if (sub->evt.s.timeout != TIPC_WAIT_FO !! 331 }
180 del_timer_sync(&sub->timer); !! 332
181 list_del(&sub->sub_list); !! 333 /* Handle one request to create a new subscription for the subscriber */
182 tipc_sub_put(sub); !! 334 static void tipc_subscrb_rcv_cb(struct net *net, int conid,
>> 335 struct sockaddr_tipc *addr, void *usr_data,
>> 336 void *buf, size_t len)
>> 337 {
>> 338 struct tipc_subscriber *subscriber = usr_data;
>> 339 struct tipc_subscr *s = (struct tipc_subscr *)buf;
>> 340 int swap;
>> 341
>> 342 /* Determine subscriber's endianness */
>> 343 swap = !(s->filter & (TIPC_SUB_PORTS | TIPC_SUB_SERVICE |
>> 344 TIPC_SUB_CANCEL));
>> 345
>> 346 /* Detect & process a subscription cancellation request */
>> 347 if (s->filter & htohl(TIPC_SUB_CANCEL, swap)) {
>> 348 s->filter &= ~htohl(TIPC_SUB_CANCEL, swap);
>> 349 return tipc_subscrp_cancel(s, subscriber);
>> 350 }
>> 351
>> 352 tipc_subscrp_subscribe(net, s, subscriber, swap);
>> 353 }
>> 354
>> 355 /* Handle one request to establish a new subscriber */
>> 356 static void *tipc_subscrb_connect_cb(int conid)
>> 357 {
>> 358 return (void *)tipc_subscrb_create(conid);
>> 359 }
>> 360
>> 361 static int tipc_topsrv_start(struct net *net)
>> 362 {
>> 363 struct tipc_net *tn = net_generic(net, tipc_net_id);
>> 364 const char name[] = "topology_server";
>> 365 struct tipc_server *topsrv;
>> 366 struct sockaddr_tipc *saddr;
>> 367
>> 368 saddr = kzalloc(sizeof(*saddr), GFP_ATOMIC);
>> 369 if (!saddr)
>> 370 return -ENOMEM;
>> 371 saddr->family = AF_TIPC;
>> 372 saddr->addrtype = TIPC_ADDR_NAMESEQ;
>> 373 saddr->addr.nameseq.type = TIPC_TOP_SRV;
>> 374 saddr->addr.nameseq.lower = TIPC_TOP_SRV;
>> 375 saddr->addr.nameseq.upper = TIPC_TOP_SRV;
>> 376 saddr->scope = TIPC_NODE_SCOPE;
>> 377
>> 378 topsrv = kzalloc(sizeof(*topsrv), GFP_ATOMIC);
>> 379 if (!topsrv) {
>> 380 kfree(saddr);
>> 381 return -ENOMEM;
>> 382 }
>> 383 topsrv->net = net;
>> 384 topsrv->saddr = saddr;
>> 385 topsrv->imp = TIPC_CRITICAL_IMPORTANCE;
>> 386 topsrv->type = SOCK_SEQPACKET;
>> 387 topsrv->max_rcvbuf_size = sizeof(struct tipc_subscr);
>> 388 topsrv->tipc_conn_recvmsg = tipc_subscrb_rcv_cb;
>> 389 topsrv->tipc_conn_new = tipc_subscrb_connect_cb;
>> 390 topsrv->tipc_conn_release = tipc_subscrb_release_cb;
>> 391
>> 392 strscpy(topsrv->name, name, sizeof(topsrv->name));
>> 393 tn->topsrv = topsrv;
>> 394 atomic_set(&tn->subscription_count, 0);
>> 395
>> 396 return tipc_server_start(topsrv);
>> 397 }
>> 398
>> 399 static void tipc_topsrv_stop(struct net *net)
>> 400 {
>> 401 struct tipc_net *tn = net_generic(net, tipc_net_id);
>> 402 struct tipc_server *topsrv = tn->topsrv;
>> 403
>> 404 tipc_server_stop(topsrv);
>> 405 kfree(topsrv->saddr);
>> 406 kfree(topsrv);
>> 407 }
>> 408
>> 409 int __net_init tipc_topsrv_init_net(struct net *net)
>> 410 {
>> 411 return tipc_topsrv_start(net);
>> 412 }
>> 413
>> 414 void __net_exit tipc_topsrv_exit_net(struct net *net)
>> 415 {
>> 416 tipc_topsrv_stop(net);
183 } 417 }
184 418
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