2 * net/tipc/bearer.c: TIPC bearer code
4 * Copyright (c) 1996-2006, 2013-2016, Ericsson AB
5 * Copyright (c) 2004-2006, 2010-2013, Wind River Systems
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
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12 * notice, this list of conditions and the following disclaimer.
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14 * notice, this list of conditions and the following disclaimer in the
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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.
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.
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
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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.
45 #include "udp_media.h"
47 #define MAX_ADDR_STR 60
49 static struct tipc_media * const media_info_array[] = {
51 #ifdef CONFIG_TIPC_MEDIA_IB
54 #ifdef CONFIG_TIPC_MEDIA_UDP
60 static struct tipc_bearer *bearer_get(struct net *net, int bearer_id)
62 struct tipc_net *tn = tipc_net(net);
64 return rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
67 static void bearer_disable(struct net *net, struct tipc_bearer *b);
70 * tipc_media_find - locates specified media object by name
72 struct tipc_media *tipc_media_find(const char *name)
76 for (i = 0; media_info_array[i] != NULL; i++) {
77 if (!strcmp(media_info_array[i]->name, name))
80 return media_info_array[i];
84 * media_find_id - locates specified media object by type identifier
86 static struct tipc_media *media_find_id(u8 type)
90 for (i = 0; media_info_array[i] != NULL; i++) {
91 if (media_info_array[i]->type_id == type)
94 return media_info_array[i];
98 * tipc_media_addr_printf - record media address in print buffer
100 void tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a)
102 char addr_str[MAX_ADDR_STR];
103 struct tipc_media *m;
106 m = media_find_id(a->media_id);
108 if (m && !m->addr2str(a, addr_str, sizeof(addr_str)))
109 ret = scnprintf(buf, len, "%s(%s)", m->name, addr_str);
113 ret = scnprintf(buf, len, "UNKNOWN(%u)", a->media_id);
114 for (i = 0; i < sizeof(a->value); i++)
115 ret += scnprintf(buf - ret, len + ret,
116 "-%02x", a->value[i]);
121 * bearer_name_validate - validate & (optionally) deconstruct bearer name
122 * @name: ptr to bearer name string
123 * @name_parts: ptr to area for bearer name components (or NULL if not needed)
125 * Returns 1 if bearer name is valid, otherwise 0.
127 static int bearer_name_validate(const char *name,
128 struct tipc_bearer_names *name_parts)
130 char name_copy[TIPC_MAX_BEARER_NAME];
136 /* copy bearer name & ensure length is OK */
137 name_copy[TIPC_MAX_BEARER_NAME - 1] = 0;
138 /* need above in case non-Posix strncpy() doesn't pad with nulls */
139 strncpy(name_copy, name, TIPC_MAX_BEARER_NAME);
140 if (name_copy[TIPC_MAX_BEARER_NAME - 1] != 0)
143 /* ensure all component parts of bearer name are present */
144 media_name = name_copy;
145 if_name = strchr(media_name, ':');
149 media_len = if_name - media_name;
150 if_len = strlen(if_name) + 1;
152 /* validate component parts of bearer name */
153 if ((media_len <= 1) || (media_len > TIPC_MAX_MEDIA_NAME) ||
154 (if_len <= 1) || (if_len > TIPC_MAX_IF_NAME))
157 /* return bearer name components, if necessary */
159 strcpy(name_parts->media_name, media_name);
160 strcpy(name_parts->if_name, if_name);
166 * tipc_bearer_find - locates bearer object with matching bearer name
168 struct tipc_bearer *tipc_bearer_find(struct net *net, const char *name)
170 struct tipc_net *tn = net_generic(net, tipc_net_id);
171 struct tipc_bearer *b;
174 for (i = 0; i < MAX_BEARERS; i++) {
175 b = rtnl_dereference(tn->bearer_list[i]);
176 if (b && (!strcmp(b->name, name)))
182 /* tipc_bearer_get_name - get the bearer name from its id.
183 * @net: network namespace
184 * @name: a pointer to the buffer where the name will be stored.
185 * @bearer_id: the id to get the name from.
187 int tipc_bearer_get_name(struct net *net, char *name, u32 bearer_id)
189 struct tipc_net *tn = tipc_net(net);
190 struct tipc_bearer *b;
192 if (bearer_id >= MAX_BEARERS)
195 b = rtnl_dereference(tn->bearer_list[bearer_id]);
199 strcpy(name, b->name);
203 void tipc_bearer_add_dest(struct net *net, u32 bearer_id, u32 dest)
205 struct tipc_net *tn = net_generic(net, tipc_net_id);
206 struct tipc_bearer *b;
209 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
211 tipc_disc_add_dest(b->link_req);
215 void tipc_bearer_remove_dest(struct net *net, u32 bearer_id, u32 dest)
217 struct tipc_net *tn = net_generic(net, tipc_net_id);
218 struct tipc_bearer *b;
221 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
223 tipc_disc_remove_dest(b->link_req);
228 * tipc_enable_bearer - enable bearer with the given name
230 static int tipc_enable_bearer(struct net *net, const char *name,
231 u32 disc_domain, u32 priority,
232 struct nlattr *attr[])
234 struct tipc_net *tn = net_generic(net, tipc_net_id);
235 struct tipc_bearer *b;
236 struct tipc_media *m;
237 struct tipc_bearer_names b_names;
239 char addr_string[16];
246 pr_warn("Bearer <%s> rejected, not supported in standalone mode\n",
250 if (!bearer_name_validate(name, &b_names)) {
251 pr_warn("Bearer <%s> rejected, illegal name\n", name);
254 if (tipc_addr_domain_valid(disc_domain) &&
255 (disc_domain != tn->own_addr)) {
256 if (tipc_in_scope(disc_domain, tn->own_addr)) {
257 disc_domain = tn->own_addr & TIPC_ZONE_CLUSTER_MASK;
258 res = 0; /* accept any node in own cluster */
259 } else if (in_own_cluster_exact(net, disc_domain))
260 res = 0; /* accept specified node in own cluster */
263 pr_warn("Bearer <%s> rejected, illegal discovery domain\n",
267 if ((priority > TIPC_MAX_LINK_PRI) &&
268 (priority != TIPC_MEDIA_LINK_PRI)) {
269 pr_warn("Bearer <%s> rejected, illegal priority\n", name);
273 m = tipc_media_find(b_names.media_name);
275 pr_warn("Bearer <%s> rejected, media <%s> not registered\n",
276 name, b_names.media_name);
280 if (priority == TIPC_MEDIA_LINK_PRI)
281 priority = m->priority;
284 bearer_id = MAX_BEARERS;
286 for (i = MAX_BEARERS; i-- != 0; ) {
287 b = rtnl_dereference(tn->bearer_list[i]);
292 if (!strcmp(name, b->name)) {
293 pr_warn("Bearer <%s> rejected, already enabled\n",
297 if ((b->priority == priority) &&
298 (++with_this_prio > 2)) {
299 if (priority-- == 0) {
300 pr_warn("Bearer <%s> rejected, duplicate priority\n",
304 pr_warn("Bearer <%s> priority adjustment required %u->%u\n",
305 name, priority + 1, priority);
309 if (bearer_id >= MAX_BEARERS) {
310 pr_warn("Bearer <%s> rejected, bearer limit reached (%u)\n",
315 b = kzalloc(sizeof(*b), GFP_ATOMIC);
319 strcpy(b->name, name);
321 res = m->enable_media(net, b, attr);
323 pr_warn("Bearer <%s> rejected, enable failure (%d)\n",
328 b->identity = bearer_id;
329 b->tolerance = m->tolerance;
330 b->window = m->window;
331 b->domain = disc_domain;
332 b->net_plane = bearer_id + 'A';
333 b->priority = priority;
334 test_and_set_bit_lock(0, &b->up);
336 res = tipc_disc_create(net, b, &b->bcast_addr, &skb);
338 bearer_disable(net, b);
339 pr_warn("Bearer <%s> rejected, discovery object creation failed\n",
344 rcu_assign_pointer(tn->bearer_list[bearer_id], b);
346 tipc_bearer_xmit_skb(net, bearer_id, skb, &b->bcast_addr);
348 if (tipc_mon_create(net, bearer_id))
351 pr_info("Enabled bearer <%s>, discovery domain %s, priority %u\n",
353 tipc_addr_string_fill(addr_string, disc_domain), priority);
358 * tipc_reset_bearer - Reset all links established over this bearer
360 static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b)
362 pr_info("Resetting bearer <%s>\n", b->name);
363 tipc_node_delete_links(net, b->identity);
364 tipc_disc_reset(net, b);
368 /* tipc_bearer_reset_all - reset all links on all bearers
370 void tipc_bearer_reset_all(struct net *net)
372 struct tipc_bearer *b;
375 for (i = 0; i < MAX_BEARERS; i++) {
376 b = bearer_get(net, i);
378 clear_bit_unlock(0, &b->up);
380 for (i = 0; i < MAX_BEARERS; i++) {
381 b = bearer_get(net, i);
383 tipc_reset_bearer(net, b);
385 for (i = 0; i < MAX_BEARERS; i++) {
386 b = bearer_get(net, i);
388 test_and_set_bit_lock(0, &b->up);
395 * Note: This routine assumes caller holds RTNL lock.
397 static void bearer_disable(struct net *net, struct tipc_bearer *b)
399 struct tipc_net *tn = tipc_net(net);
400 int bearer_id = b->identity;
402 pr_info("Disabling bearer <%s>\n", b->name);
403 clear_bit_unlock(0, &b->up);
404 tipc_node_delete_links(net, bearer_id);
405 b->media->disable_media(b);
406 RCU_INIT_POINTER(b->media_ptr, NULL);
408 tipc_disc_delete(b->link_req);
409 RCU_INIT_POINTER(tn->bearer_list[bearer_id], NULL);
411 tipc_mon_delete(net, bearer_id);
414 int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b,
415 struct nlattr *attr[])
417 struct net_device *dev;
418 char *driver_name = strchr((const char *)b->name, ':') + 1;
420 /* Find device with specified name */
421 dev = dev_get_by_name(net, driver_name);
424 if (tipc_mtu_bad(dev, 0)) {
429 /* Associate TIPC bearer with L2 bearer */
430 rcu_assign_pointer(b->media_ptr, dev);
431 memset(&b->bcast_addr, 0, sizeof(b->bcast_addr));
432 memcpy(b->bcast_addr.value, dev->broadcast, b->media->hwaddr_len);
433 b->bcast_addr.media_id = b->media->type_id;
434 b->bcast_addr.broadcast = 1;
436 b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr);
437 rcu_assign_pointer(dev->tipc_ptr, b);
441 /* tipc_disable_l2_media - detach TIPC bearer from an L2 interface
443 * Mark L2 bearer as inactive so that incoming buffers are thrown away
445 void tipc_disable_l2_media(struct tipc_bearer *b)
447 struct net_device *dev;
449 dev = (struct net_device *)rtnl_dereference(b->media_ptr);
450 RCU_INIT_POINTER(dev->tipc_ptr, NULL);
456 * tipc_l2_send_msg - send a TIPC packet out over an L2 interface
457 * @skb: the packet to be sent
458 * @b: the bearer through which the packet is to be sent
459 * @dest: peer destination address
461 int tipc_l2_send_msg(struct net *net, struct sk_buff *skb,
462 struct tipc_bearer *b, struct tipc_media_addr *dest)
464 struct net_device *dev;
467 dev = (struct net_device *)rcu_dereference_rtnl(b->media_ptr);
471 delta = SKB_DATA_ALIGN(dev->hard_header_len - skb_headroom(skb));
472 if ((delta > 0) && pskb_expand_head(skb, delta, 0, GFP_ATOMIC)) {
476 skb_reset_network_header(skb);
478 skb->protocol = htons(ETH_P_TIPC);
479 dev_hard_header(skb, dev, ETH_P_TIPC, dest->value,
480 dev->dev_addr, skb->len);
485 int tipc_bearer_mtu(struct net *net, u32 bearer_id)
488 struct tipc_bearer *b;
491 b = rcu_dereference_rtnl(tipc_net(net)->bearer_list[bearer_id]);
498 /* tipc_bearer_xmit_skb - sends buffer to destination over bearer
500 void tipc_bearer_xmit_skb(struct net *net, u32 bearer_id,
502 struct tipc_media_addr *dest)
504 struct tipc_msg *hdr = buf_msg(skb);
505 struct tipc_bearer *b;
508 b = bearer_get(net, bearer_id);
509 if (likely(b && (test_bit(0, &b->up) || msg_is_reset(hdr))))
510 b->media->send_msg(net, skb, b, dest);
516 /* tipc_bearer_xmit() -send buffer to destination over bearer
518 void tipc_bearer_xmit(struct net *net, u32 bearer_id,
519 struct sk_buff_head *xmitq,
520 struct tipc_media_addr *dst)
522 struct tipc_bearer *b;
523 struct sk_buff *skb, *tmp;
525 if (skb_queue_empty(xmitq))
529 b = bearer_get(net, bearer_id);
531 __skb_queue_purge(xmitq);
532 skb_queue_walk_safe(xmitq, skb, tmp) {
533 __skb_dequeue(xmitq);
534 if (likely(test_bit(0, &b->up) || msg_is_reset(buf_msg(skb))))
535 b->media->send_msg(net, skb, b, dst);
542 /* tipc_bearer_bc_xmit() - broadcast buffers to all destinations
544 void tipc_bearer_bc_xmit(struct net *net, u32 bearer_id,
545 struct sk_buff_head *xmitq)
547 struct tipc_net *tn = tipc_net(net);
548 int net_id = tn->net_id;
549 struct tipc_bearer *b;
550 struct sk_buff *skb, *tmp;
551 struct tipc_msg *hdr;
554 b = bearer_get(net, bearer_id);
555 if (unlikely(!b || !test_bit(0, &b->up)))
556 __skb_queue_purge(xmitq);
557 skb_queue_walk_safe(xmitq, skb, tmp) {
559 msg_set_non_seq(hdr, 1);
560 msg_set_mc_netid(hdr, net_id);
561 __skb_dequeue(xmitq);
562 b->media->send_msg(net, skb, b, &b->bcast_addr);
568 * tipc_l2_rcv_msg - handle incoming TIPC message from an interface
569 * @buf: the received packet
570 * @dev: the net device that the packet was received on
571 * @pt: the packet_type structure which was used to register this handler
572 * @orig_dev: the original receive net device in case the device is a bond
574 * Accept only packets explicitly sent to this node, or broadcast packets;
575 * ignores packets sent using interface multicast, and traffic sent to other
576 * nodes (which can happen if interface is running in promiscuous mode).
578 static int tipc_l2_rcv_msg(struct sk_buff *skb, struct net_device *dev,
579 struct packet_type *pt, struct net_device *orig_dev)
581 struct tipc_bearer *b;
584 b = rcu_dereference_rtnl(dev->tipc_ptr);
585 if (likely(b && test_bit(0, &b->up) &&
586 (skb->pkt_type <= PACKET_BROADCAST))) {
588 tipc_rcv(dev_net(dev), skb, b);
590 return NET_RX_SUCCESS;
598 * tipc_l2_device_event - handle device events from network device
599 * @nb: the context of the notification
600 * @evt: the type of event
601 * @ptr: the net device that the event was on
603 * This function is called by the Ethernet driver in case of link
606 static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt,
609 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
610 struct net *net = dev_net(dev);
611 struct tipc_bearer *b;
613 b = rtnl_dereference(dev->tipc_ptr);
619 if (netif_carrier_ok(dev))
622 test_and_set_bit_lock(0, &b->up);
624 case NETDEV_GOING_DOWN:
625 clear_bit_unlock(0, &b->up);
626 tipc_reset_bearer(net, b);
628 case NETDEV_CHANGEMTU:
629 if (tipc_mtu_bad(dev, 0)) {
630 bearer_disable(net, b);
634 tipc_reset_bearer(net, b);
636 case NETDEV_CHANGEADDR:
637 b->media->raw2addr(b, &b->addr,
638 (char *)dev->dev_addr);
639 tipc_reset_bearer(net, b);
641 case NETDEV_UNREGISTER:
642 case NETDEV_CHANGENAME:
643 bearer_disable(dev_net(dev), b);
649 static struct packet_type tipc_packet_type __read_mostly = {
650 .type = htons(ETH_P_TIPC),
651 .func = tipc_l2_rcv_msg,
654 static struct notifier_block notifier = {
655 .notifier_call = tipc_l2_device_event,
659 int tipc_bearer_setup(void)
663 err = register_netdevice_notifier(¬ifier);
666 dev_add_pack(&tipc_packet_type);
670 void tipc_bearer_cleanup(void)
672 unregister_netdevice_notifier(¬ifier);
673 dev_remove_pack(&tipc_packet_type);
676 void tipc_bearer_stop(struct net *net)
678 struct tipc_net *tn = net_generic(net, tipc_net_id);
679 struct tipc_bearer *b;
682 for (i = 0; i < MAX_BEARERS; i++) {
683 b = rtnl_dereference(tn->bearer_list[i]);
685 bearer_disable(net, b);
686 tn->bearer_list[i] = NULL;
691 /* Caller should hold rtnl_lock to protect the bearer */
692 static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg,
693 struct tipc_bearer *bearer, int nlflags)
696 struct nlattr *attrs;
699 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
700 nlflags, TIPC_NL_BEARER_GET);
704 attrs = nla_nest_start(msg->skb, TIPC_NLA_BEARER);
708 if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name))
711 prop = nla_nest_start(msg->skb, TIPC_NLA_BEARER_PROP);
714 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority))
716 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance))
718 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window))
721 nla_nest_end(msg->skb, prop);
723 #ifdef CONFIG_TIPC_MEDIA_UDP
724 if (bearer->media->type_id == TIPC_MEDIA_TYPE_UDP) {
725 if (tipc_udp_nl_add_bearer_data(msg, bearer))
730 nla_nest_end(msg->skb, attrs);
731 genlmsg_end(msg->skb, hdr);
736 nla_nest_cancel(msg->skb, prop);
738 nla_nest_cancel(msg->skb, attrs);
740 genlmsg_cancel(msg->skb, hdr);
745 int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb)
749 struct tipc_bearer *bearer;
750 struct tipc_nl_msg msg;
751 struct net *net = sock_net(skb->sk);
752 struct tipc_net *tn = net_generic(net, tipc_net_id);
754 if (i == MAX_BEARERS)
758 msg.portid = NETLINK_CB(cb->skb).portid;
759 msg.seq = cb->nlh->nlmsg_seq;
762 for (i = 0; i < MAX_BEARERS; i++) {
763 bearer = rtnl_dereference(tn->bearer_list[i]);
767 err = __tipc_nl_add_bearer(&msg, bearer, NLM_F_MULTI);
777 int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info)
782 struct tipc_bearer *bearer;
783 struct tipc_nl_msg msg;
784 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
785 struct net *net = genl_info_net(info);
787 if (!info->attrs[TIPC_NLA_BEARER])
790 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
791 info->attrs[TIPC_NLA_BEARER],
792 tipc_nl_bearer_policy);
796 if (!attrs[TIPC_NLA_BEARER_NAME])
798 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
800 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
805 msg.portid = info->snd_portid;
806 msg.seq = info->snd_seq;
809 bearer = tipc_bearer_find(net, name);
815 err = __tipc_nl_add_bearer(&msg, bearer, 0);
820 return genlmsg_reply(rep, info);
828 int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info)
832 struct tipc_bearer *bearer;
833 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
834 struct net *net = sock_net(skb->sk);
836 if (!info->attrs[TIPC_NLA_BEARER])
839 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
840 info->attrs[TIPC_NLA_BEARER],
841 tipc_nl_bearer_policy);
845 if (!attrs[TIPC_NLA_BEARER_NAME])
848 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
851 bearer = tipc_bearer_find(net, name);
857 bearer_disable(net, bearer);
863 int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
867 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
868 struct net *net = sock_net(skb->sk);
869 struct tipc_net *tn = net_generic(net, tipc_net_id);
873 prio = TIPC_MEDIA_LINK_PRI;
874 domain = tn->own_addr & TIPC_ZONE_CLUSTER_MASK;
876 if (!info->attrs[TIPC_NLA_BEARER])
879 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
880 info->attrs[TIPC_NLA_BEARER],
881 tipc_nl_bearer_policy);
885 if (!attrs[TIPC_NLA_BEARER_NAME])
888 bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
890 if (attrs[TIPC_NLA_BEARER_DOMAIN])
891 domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]);
893 if (attrs[TIPC_NLA_BEARER_PROP]) {
894 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
896 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
901 if (props[TIPC_NLA_PROP_PRIO])
902 prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
906 err = tipc_enable_bearer(net, bearer, domain, prio, attrs);
916 int tipc_nl_bearer_add(struct sk_buff *skb, struct genl_info *info)
920 struct tipc_bearer *b;
921 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
922 struct net *net = sock_net(skb->sk);
924 if (!info->attrs[TIPC_NLA_BEARER])
927 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
928 info->attrs[TIPC_NLA_BEARER],
929 tipc_nl_bearer_policy);
933 if (!attrs[TIPC_NLA_BEARER_NAME])
935 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
938 b = tipc_bearer_find(net, name);
944 #ifdef CONFIG_TIPC_MEDIA_UDP
945 if (attrs[TIPC_NLA_BEARER_UDP_OPTS]) {
946 err = tipc_udp_nl_bearer_add(b,
947 attrs[TIPC_NLA_BEARER_UDP_OPTS]);
959 int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
963 struct tipc_bearer *b;
964 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
965 struct net *net = sock_net(skb->sk);
967 if (!info->attrs[TIPC_NLA_BEARER])
970 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
971 info->attrs[TIPC_NLA_BEARER],
972 tipc_nl_bearer_policy);
976 if (!attrs[TIPC_NLA_BEARER_NAME])
978 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
981 b = tipc_bearer_find(net, name);
987 if (attrs[TIPC_NLA_BEARER_PROP]) {
988 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
990 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
997 if (props[TIPC_NLA_PROP_TOL])
998 b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
999 if (props[TIPC_NLA_PROP_PRIO])
1000 b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
1001 if (props[TIPC_NLA_PROP_WIN])
1002 b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
1009 static int __tipc_nl_add_media(struct tipc_nl_msg *msg,
1010 struct tipc_media *media, int nlflags)
1013 struct nlattr *attrs;
1014 struct nlattr *prop;
1016 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
1017 nlflags, TIPC_NL_MEDIA_GET);
1021 attrs = nla_nest_start(msg->skb, TIPC_NLA_MEDIA);
1025 if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name))
1028 prop = nla_nest_start(msg->skb, TIPC_NLA_MEDIA_PROP);
1031 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority))
1033 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance))
1035 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window))
1038 nla_nest_end(msg->skb, prop);
1039 nla_nest_end(msg->skb, attrs);
1040 genlmsg_end(msg->skb, hdr);
1045 nla_nest_cancel(msg->skb, prop);
1047 nla_nest_cancel(msg->skb, attrs);
1049 genlmsg_cancel(msg->skb, hdr);
1054 int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb)
1057 int i = cb->args[0];
1058 struct tipc_nl_msg msg;
1064 msg.portid = NETLINK_CB(cb->skb).portid;
1065 msg.seq = cb->nlh->nlmsg_seq;
1068 for (; media_info_array[i] != NULL; i++) {
1069 err = __tipc_nl_add_media(&msg, media_info_array[i],
1080 int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info)
1084 struct tipc_nl_msg msg;
1085 struct tipc_media *media;
1086 struct sk_buff *rep;
1087 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1089 if (!info->attrs[TIPC_NLA_MEDIA])
1092 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
1093 info->attrs[TIPC_NLA_MEDIA],
1094 tipc_nl_media_policy);
1098 if (!attrs[TIPC_NLA_MEDIA_NAME])
1100 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1102 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1107 msg.portid = info->snd_portid;
1108 msg.seq = info->snd_seq;
1111 media = tipc_media_find(name);
1117 err = __tipc_nl_add_media(&msg, media, 0);
1122 return genlmsg_reply(rep, info);
1130 int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
1134 struct tipc_media *m;
1135 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1137 if (!info->attrs[TIPC_NLA_MEDIA])
1140 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
1141 info->attrs[TIPC_NLA_MEDIA],
1142 tipc_nl_media_policy);
1144 if (!attrs[TIPC_NLA_MEDIA_NAME])
1146 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1149 m = tipc_media_find(name);
1155 if (attrs[TIPC_NLA_MEDIA_PROP]) {
1156 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
1158 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP],
1165 if (props[TIPC_NLA_PROP_TOL])
1166 m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
1167 if (props[TIPC_NLA_PROP_PRIO])
1168 m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
1169 if (props[TIPC_NLA_PROP_WIN])
1170 m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);