~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/net/tipc/bearer.c

Version: ~ [ linux-5.7-rc7 ] ~ [ linux-5.6.14 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.42 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.124 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.181 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.224 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.224 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.84 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /*
  2  * net/tipc/bearer.c: TIPC bearer code
  3  *
  4  * Copyright (c) 1996-2006, 2013, Ericsson AB
  5  * Copyright (c) 2004-2006, 2010-2013, 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 "config.h"
 39 #include "bearer.h"
 40 #include "discover.h"
 41 
 42 #define MAX_ADDR_STR 60
 43 
 44 static struct tipc_media * const media_info_array[] = {
 45         &eth_media_info,
 46 #ifdef CONFIG_TIPC_MEDIA_IB
 47         &ib_media_info,
 48 #endif
 49         NULL
 50 };
 51 
 52 struct tipc_bearer __rcu *bearer_list[MAX_BEARERS + 1];
 53 
 54 static void bearer_disable(struct tipc_bearer *b_ptr, bool shutting_down);
 55 
 56 /**
 57  * tipc_media_find - locates specified media object by name
 58  */
 59 struct tipc_media *tipc_media_find(const char *name)
 60 {
 61         u32 i;
 62 
 63         for (i = 0; media_info_array[i] != NULL; i++) {
 64                 if (!strcmp(media_info_array[i]->name, name))
 65                         break;
 66         }
 67         return media_info_array[i];
 68 }
 69 
 70 /**
 71  * media_find_id - locates specified media object by type identifier
 72  */
 73 static struct tipc_media *media_find_id(u8 type)
 74 {
 75         u32 i;
 76 
 77         for (i = 0; media_info_array[i] != NULL; i++) {
 78                 if (media_info_array[i]->type_id == type)
 79                         break;
 80         }
 81         return media_info_array[i];
 82 }
 83 
 84 /**
 85  * tipc_media_addr_printf - record media address in print buffer
 86  */
 87 void tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a)
 88 {
 89         char addr_str[MAX_ADDR_STR];
 90         struct tipc_media *m_ptr;
 91         int ret;
 92 
 93         m_ptr = media_find_id(a->media_id);
 94 
 95         if (m_ptr && !m_ptr->addr2str(a, addr_str, sizeof(addr_str)))
 96                 ret = tipc_snprintf(buf, len, "%s(%s)", m_ptr->name, addr_str);
 97         else {
 98                 u32 i;
 99 
100                 ret = tipc_snprintf(buf, len, "UNKNOWN(%u)", a->media_id);
101                 for (i = 0; i < sizeof(a->value); i++)
102                         ret += tipc_snprintf(buf - ret, len + ret,
103                                             "-%02x", a->value[i]);
104         }
105 }
106 
107 /**
108  * tipc_media_get_names - record names of registered media in buffer
109  */
110 struct sk_buff *tipc_media_get_names(void)
111 {
112         struct sk_buff *buf;
113         int i;
114 
115         buf = tipc_cfg_reply_alloc(MAX_MEDIA * TLV_SPACE(TIPC_MAX_MEDIA_NAME));
116         if (!buf)
117                 return NULL;
118 
119         for (i = 0; media_info_array[i] != NULL; i++) {
120                 tipc_cfg_append_tlv(buf, TIPC_TLV_MEDIA_NAME,
121                                     media_info_array[i]->name,
122                                     strlen(media_info_array[i]->name) + 1);
123         }
124         return buf;
125 }
126 
127 /**
128  * bearer_name_validate - validate & (optionally) deconstruct bearer name
129  * @name: ptr to bearer name string
130  * @name_parts: ptr to area for bearer name components (or NULL if not needed)
131  *
132  * Returns 1 if bearer name is valid, otherwise 0.
133  */
134 static int bearer_name_validate(const char *name,
135                                 struct tipc_bearer_names *name_parts)
136 {
137         char name_copy[TIPC_MAX_BEARER_NAME];
138         char *media_name;
139         char *if_name;
140         u32 media_len;
141         u32 if_len;
142 
143         /* copy bearer name & ensure length is OK */
144         name_copy[TIPC_MAX_BEARER_NAME - 1] = 0;
145         /* need above in case non-Posix strncpy() doesn't pad with nulls */
146         strncpy(name_copy, name, TIPC_MAX_BEARER_NAME);
147         if (name_copy[TIPC_MAX_BEARER_NAME - 1] != 0)
148                 return 0;
149 
150         /* ensure all component parts of bearer name are present */
151         media_name = name_copy;
152         if_name = strchr(media_name, ':');
153         if (if_name == NULL)
154                 return 0;
155         *(if_name++) = 0;
156         media_len = if_name - media_name;
157         if_len = strlen(if_name) + 1;
158 
159         /* validate component parts of bearer name */
160         if ((media_len <= 1) || (media_len > TIPC_MAX_MEDIA_NAME) ||
161             (if_len <= 1) || (if_len > TIPC_MAX_IF_NAME))
162                 return 0;
163 
164         /* return bearer name components, if necessary */
165         if (name_parts) {
166                 strcpy(name_parts->media_name, media_name);
167                 strcpy(name_parts->if_name, if_name);
168         }
169         return 1;
170 }
171 
172 /**
173  * tipc_bearer_find - locates bearer object with matching bearer name
174  */
175 struct tipc_bearer *tipc_bearer_find(const char *name)
176 {
177         struct tipc_bearer *b_ptr;
178         u32 i;
179 
180         for (i = 0; i < MAX_BEARERS; i++) {
181                 b_ptr = rtnl_dereference(bearer_list[i]);
182                 if (b_ptr && (!strcmp(b_ptr->name, name)))
183                         return b_ptr;
184         }
185         return NULL;
186 }
187 
188 /**
189  * tipc_bearer_get_names - record names of bearers in buffer
190  */
191 struct sk_buff *tipc_bearer_get_names(void)
192 {
193         struct sk_buff *buf;
194         struct tipc_bearer *b;
195         int i, j;
196 
197         buf = tipc_cfg_reply_alloc(MAX_BEARERS * TLV_SPACE(TIPC_MAX_BEARER_NAME));
198         if (!buf)
199                 return NULL;
200 
201         for (i = 0; media_info_array[i] != NULL; i++) {
202                 for (j = 0; j < MAX_BEARERS; j++) {
203                         b = rtnl_dereference(bearer_list[j]);
204                         if (!b)
205                                 continue;
206                         if (b->media == media_info_array[i]) {
207                                 tipc_cfg_append_tlv(buf, TIPC_TLV_BEARER_NAME,
208                                                     b->name,
209                                                     strlen(b->name) + 1);
210                         }
211                 }
212         }
213         return buf;
214 }
215 
216 void tipc_bearer_add_dest(u32 bearer_id, u32 dest)
217 {
218         struct tipc_bearer *b_ptr;
219 
220         rcu_read_lock();
221         b_ptr = rcu_dereference_rtnl(bearer_list[bearer_id]);
222         if (b_ptr) {
223                 tipc_bcbearer_sort(&b_ptr->nodes, dest, true);
224                 tipc_disc_add_dest(b_ptr->link_req);
225         }
226         rcu_read_unlock();
227 }
228 
229 void tipc_bearer_remove_dest(u32 bearer_id, u32 dest)
230 {
231         struct tipc_bearer *b_ptr;
232 
233         rcu_read_lock();
234         b_ptr = rcu_dereference_rtnl(bearer_list[bearer_id]);
235         if (b_ptr) {
236                 tipc_bcbearer_sort(&b_ptr->nodes, dest, false);
237                 tipc_disc_remove_dest(b_ptr->link_req);
238         }
239         rcu_read_unlock();
240 }
241 
242 /**
243  * tipc_enable_bearer - enable bearer with the given name
244  */
245 int tipc_enable_bearer(const char *name, u32 disc_domain, u32 priority)
246 {
247         struct tipc_bearer *b_ptr;
248         struct tipc_media *m_ptr;
249         struct tipc_bearer_names b_names;
250         char addr_string[16];
251         u32 bearer_id;
252         u32 with_this_prio;
253         u32 i;
254         int res = -EINVAL;
255 
256         if (!tipc_own_addr) {
257                 pr_warn("Bearer <%s> rejected, not supported in standalone mode\n",
258                         name);
259                 return -ENOPROTOOPT;
260         }
261         if (!bearer_name_validate(name, &b_names)) {
262                 pr_warn("Bearer <%s> rejected, illegal name\n", name);
263                 return -EINVAL;
264         }
265         if (tipc_addr_domain_valid(disc_domain) &&
266             (disc_domain != tipc_own_addr)) {
267                 if (tipc_in_scope(disc_domain, tipc_own_addr)) {
268                         disc_domain = tipc_own_addr & TIPC_CLUSTER_MASK;
269                         res = 0;   /* accept any node in own cluster */
270                 } else if (in_own_cluster_exact(disc_domain))
271                         res = 0;   /* accept specified node in own cluster */
272         }
273         if (res) {
274                 pr_warn("Bearer <%s> rejected, illegal discovery domain\n",
275                         name);
276                 return -EINVAL;
277         }
278         if ((priority > TIPC_MAX_LINK_PRI) &&
279             (priority != TIPC_MEDIA_LINK_PRI)) {
280                 pr_warn("Bearer <%s> rejected, illegal priority\n", name);
281                 return -EINVAL;
282         }
283 
284         m_ptr = tipc_media_find(b_names.media_name);
285         if (!m_ptr) {
286                 pr_warn("Bearer <%s> rejected, media <%s> not registered\n",
287                         name, b_names.media_name);
288                 return -EINVAL;
289         }
290 
291         if (priority == TIPC_MEDIA_LINK_PRI)
292                 priority = m_ptr->priority;
293 
294 restart:
295         bearer_id = MAX_BEARERS;
296         with_this_prio = 1;
297         for (i = MAX_BEARERS; i-- != 0; ) {
298                 b_ptr = rtnl_dereference(bearer_list[i]);
299                 if (!b_ptr) {
300                         bearer_id = i;
301                         continue;
302                 }
303                 if (!strcmp(name, b_ptr->name)) {
304                         pr_warn("Bearer <%s> rejected, already enabled\n",
305                                 name);
306                         return -EINVAL;
307                 }
308                 if ((b_ptr->priority == priority) &&
309                     (++with_this_prio > 2)) {
310                         if (priority-- == 0) {
311                                 pr_warn("Bearer <%s> rejected, duplicate priority\n",
312                                         name);
313                                 return -EINVAL;
314                         }
315                         pr_warn("Bearer <%s> priority adjustment required %u->%u\n",
316                                 name, priority + 1, priority);
317                         goto restart;
318                 }
319         }
320         if (bearer_id >= MAX_BEARERS) {
321                 pr_warn("Bearer <%s> rejected, bearer limit reached (%u)\n",
322                         name, MAX_BEARERS);
323                 return -EINVAL;
324         }
325 
326         b_ptr = kzalloc(sizeof(*b_ptr), GFP_ATOMIC);
327         if (!b_ptr)
328                 return -ENOMEM;
329 
330         strcpy(b_ptr->name, name);
331         b_ptr->media = m_ptr;
332         res = m_ptr->enable_media(b_ptr);
333         if (res) {
334                 pr_warn("Bearer <%s> rejected, enable failure (%d)\n",
335                         name, -res);
336                 return -EINVAL;
337         }
338 
339         b_ptr->identity = bearer_id;
340         b_ptr->tolerance = m_ptr->tolerance;
341         b_ptr->window = m_ptr->window;
342         b_ptr->domain = disc_domain;
343         b_ptr->net_plane = bearer_id + 'A';
344         b_ptr->priority = priority;
345 
346         res = tipc_disc_create(b_ptr, &b_ptr->bcast_addr);
347         if (res) {
348                 bearer_disable(b_ptr, false);
349                 pr_warn("Bearer <%s> rejected, discovery object creation failed\n",
350                         name);
351                 return -EINVAL;
352         }
353 
354         rcu_assign_pointer(bearer_list[bearer_id], b_ptr);
355 
356         pr_info("Enabled bearer <%s>, discovery domain %s, priority %u\n",
357                 name,
358                 tipc_addr_string_fill(addr_string, disc_domain), priority);
359         return res;
360 }
361 
362 /**
363  * tipc_reset_bearer - Reset all links established over this bearer
364  */
365 static int tipc_reset_bearer(struct tipc_bearer *b_ptr)
366 {
367         pr_info("Resetting bearer <%s>\n", b_ptr->name);
368         tipc_link_reset_list(b_ptr->identity);
369         tipc_disc_reset(b_ptr);
370         return 0;
371 }
372 
373 /**
374  * bearer_disable
375  *
376  * Note: This routine assumes caller holds RTNL lock.
377  */
378 static void bearer_disable(struct tipc_bearer *b_ptr, bool shutting_down)
379 {
380         u32 i;
381 
382         pr_info("Disabling bearer <%s>\n", b_ptr->name);
383         b_ptr->media->disable_media(b_ptr);
384 
385         tipc_link_delete_list(b_ptr->identity, shutting_down);
386         if (b_ptr->link_req)
387                 tipc_disc_delete(b_ptr->link_req);
388 
389         for (i = 0; i < MAX_BEARERS; i++) {
390                 if (b_ptr == rtnl_dereference(bearer_list[i])) {
391                         RCU_INIT_POINTER(bearer_list[i], NULL);
392                         break;
393                 }
394         }
395         kfree_rcu(b_ptr, rcu);
396 }
397 
398 int tipc_disable_bearer(const char *name)
399 {
400         struct tipc_bearer *b_ptr;
401         int res;
402 
403         b_ptr = tipc_bearer_find(name);
404         if (b_ptr == NULL) {
405                 pr_warn("Attempt to disable unknown bearer <%s>\n", name);
406                 res = -EINVAL;
407         } else {
408                 bearer_disable(b_ptr, false);
409                 res = 0;
410         }
411         return res;
412 }
413 
414 int tipc_enable_l2_media(struct tipc_bearer *b)
415 {
416         struct net_device *dev;
417         char *driver_name = strchr((const char *)b->name, ':') + 1;
418 
419         /* Find device with specified name */
420         dev = dev_get_by_name(&init_net, driver_name);
421         if (!dev)
422                 return -ENODEV;
423 
424         /* Associate TIPC bearer with L2 bearer */
425         rcu_assign_pointer(b->media_ptr, dev);
426         memset(&b->bcast_addr, 0, sizeof(b->bcast_addr));
427         memcpy(b->bcast_addr.value, dev->broadcast, b->media->hwaddr_len);
428         b->bcast_addr.media_id = b->media->type_id;
429         b->bcast_addr.broadcast = 1;
430         b->mtu = dev->mtu;
431         b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr);
432         rcu_assign_pointer(dev->tipc_ptr, b);
433         return 0;
434 }
435 
436 /* tipc_disable_l2_media - detach TIPC bearer from an L2 interface
437  *
438  * Mark L2 bearer as inactive so that incoming buffers are thrown away,
439  * then get worker thread to complete bearer cleanup.  (Can't do cleanup
440  * here because cleanup code needs to sleep and caller holds spinlocks.)
441  */
442 void tipc_disable_l2_media(struct tipc_bearer *b)
443 {
444         struct net_device *dev;
445 
446         dev = (struct net_device *)rtnl_dereference(b->media_ptr);
447         RCU_INIT_POINTER(b->media_ptr, NULL);
448         RCU_INIT_POINTER(dev->tipc_ptr, NULL);
449         synchronize_net();
450         dev_put(dev);
451 }
452 
453 /**
454  * tipc_l2_send_msg - send a TIPC packet out over an L2 interface
455  * @buf: the packet to be sent
456  * @b_ptr: the bearer through which the packet is to be sent
457  * @dest: peer destination address
458  */
459 int tipc_l2_send_msg(struct sk_buff *buf, struct tipc_bearer *b,
460                      struct tipc_media_addr *dest)
461 {
462         struct sk_buff *clone;
463         struct net_device *dev;
464         int delta;
465 
466         dev = (struct net_device *)rcu_dereference_rtnl(b->media_ptr);
467         if (!dev)
468                 return 0;
469 
470         clone = skb_clone(buf, GFP_ATOMIC);
471         if (!clone)
472                 return 0;
473 
474         delta = dev->hard_header_len - skb_headroom(buf);
475         if ((delta > 0) &&
476             pskb_expand_head(clone, SKB_DATA_ALIGN(delta), 0, GFP_ATOMIC)) {
477                 kfree_skb(clone);
478                 return 0;
479         }
480 
481         skb_reset_network_header(clone);
482         clone->dev = dev;
483         clone->protocol = htons(ETH_P_TIPC);
484         dev_hard_header(clone, dev, ETH_P_TIPC, dest->value,
485                         dev->dev_addr, clone->len);
486         dev_queue_xmit(clone);
487         return 0;
488 }
489 
490 /* tipc_bearer_send- sends buffer to destination over bearer
491  *
492  * IMPORTANT:
493  * The media send routine must not alter the buffer being passed in
494  * as it may be needed for later retransmission!
495  */
496 void tipc_bearer_send(u32 bearer_id, struct sk_buff *buf,
497                       struct tipc_media_addr *dest)
498 {
499         struct tipc_bearer *b_ptr;
500 
501         rcu_read_lock();
502         b_ptr = rcu_dereference_rtnl(bearer_list[bearer_id]);
503         if (likely(b_ptr))
504                 b_ptr->media->send_msg(buf, b_ptr, dest);
505         rcu_read_unlock();
506 }
507 
508 /**
509  * tipc_l2_rcv_msg - handle incoming TIPC message from an interface
510  * @buf: the received packet
511  * @dev: the net device that the packet was received on
512  * @pt: the packet_type structure which was used to register this handler
513  * @orig_dev: the original receive net device in case the device is a bond
514  *
515  * Accept only packets explicitly sent to this node, or broadcast packets;
516  * ignores packets sent using interface multicast, and traffic sent to other
517  * nodes (which can happen if interface is running in promiscuous mode).
518  */
519 static int tipc_l2_rcv_msg(struct sk_buff *buf, struct net_device *dev,
520                            struct packet_type *pt, struct net_device *orig_dev)
521 {
522         struct tipc_bearer *b_ptr;
523 
524         if (!net_eq(dev_net(dev), &init_net)) {
525                 kfree_skb(buf);
526                 return NET_RX_DROP;
527         }
528 
529         rcu_read_lock();
530         b_ptr = rcu_dereference_rtnl(dev->tipc_ptr);
531         if (likely(b_ptr)) {
532                 if (likely(buf->pkt_type <= PACKET_BROADCAST)) {
533                         buf->next = NULL;
534                         tipc_rcv(buf, b_ptr);
535                         rcu_read_unlock();
536                         return NET_RX_SUCCESS;
537                 }
538         }
539         rcu_read_unlock();
540 
541         kfree_skb(buf);
542         return NET_RX_DROP;
543 }
544 
545 /**
546  * tipc_l2_device_event - handle device events from network device
547  * @nb: the context of the notification
548  * @evt: the type of event
549  * @ptr: the net device that the event was on
550  *
551  * This function is called by the Ethernet driver in case of link
552  * change event.
553  */
554 static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt,
555                                 void *ptr)
556 {
557         struct tipc_bearer *b_ptr;
558         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
559 
560         if (!net_eq(dev_net(dev), &init_net))
561                 return NOTIFY_DONE;
562 
563         b_ptr = rtnl_dereference(dev->tipc_ptr);
564         if (!b_ptr)
565                 return NOTIFY_DONE;
566 
567         b_ptr->mtu = dev->mtu;
568 
569         switch (evt) {
570         case NETDEV_CHANGE:
571                 if (netif_carrier_ok(dev))
572                         break;
573         case NETDEV_DOWN:
574         case NETDEV_CHANGEMTU:
575                 tipc_reset_bearer(b_ptr);
576                 break;
577         case NETDEV_CHANGEADDR:
578                 b_ptr->media->raw2addr(b_ptr, &b_ptr->addr,
579                                        (char *)dev->dev_addr);
580                 tipc_reset_bearer(b_ptr);
581                 break;
582         case NETDEV_UNREGISTER:
583         case NETDEV_CHANGENAME:
584                 bearer_disable(b_ptr, false);
585                 break;
586         }
587         return NOTIFY_OK;
588 }
589 
590 static struct packet_type tipc_packet_type __read_mostly = {
591         .type = htons(ETH_P_TIPC),
592         .func = tipc_l2_rcv_msg,
593 };
594 
595 static struct notifier_block notifier = {
596         .notifier_call  = tipc_l2_device_event,
597         .priority       = 0,
598 };
599 
600 int tipc_bearer_setup(void)
601 {
602         int err;
603 
604         err = register_netdevice_notifier(&notifier);
605         if (err)
606                 return err;
607         dev_add_pack(&tipc_packet_type);
608         return 0;
609 }
610 
611 void tipc_bearer_cleanup(void)
612 {
613         unregister_netdevice_notifier(&notifier);
614         dev_remove_pack(&tipc_packet_type);
615 }
616 
617 void tipc_bearer_stop(void)
618 {
619         struct tipc_bearer *b_ptr;
620         u32 i;
621 
622         for (i = 0; i < MAX_BEARERS; i++) {
623                 b_ptr = rtnl_dereference(bearer_list[i]);
624                 if (b_ptr) {
625                         bearer_disable(b_ptr, true);
626                         bearer_list[i] = NULL;
627                 }
628         }
629 }
630 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp