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:
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.
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
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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.
45 #include "udp_media.h"
48 #define MAX_ADDR_STR 60
50 static struct tipc_media * const media_info_array[] = {
52 #ifdef CONFIG_TIPC_MEDIA_IB
55 #ifdef CONFIG_TIPC_MEDIA_UDP
61 static struct tipc_bearer *bearer_get(struct net *net, int bearer_id)
63 struct tipc_net *tn = tipc_net(net);
65 return rcu_dereference(tn->bearer_list[bearer_id]);
68 static void bearer_disable(struct net *net, struct tipc_bearer *b);
69 static int tipc_l2_rcv_msg(struct sk_buff *skb, struct net_device *dev,
70 struct packet_type *pt, struct net_device *orig_dev);
73 * tipc_media_find - locates specified media object by name
75 struct tipc_media *tipc_media_find(const char *name)
79 for (i = 0; media_info_array[i] != NULL; i++) {
80 if (!strcmp(media_info_array[i]->name, name))
83 return media_info_array[i];
87 * media_find_id - locates specified media object by type identifier
89 static struct tipc_media *media_find_id(u8 type)
93 for (i = 0; media_info_array[i] != NULL; i++) {
94 if (media_info_array[i]->type_id == type)
97 return media_info_array[i];
101 * tipc_media_addr_printf - record media address in print buffer
103 int tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a)
105 char addr_str[MAX_ADDR_STR];
106 struct tipc_media *m;
109 m = media_find_id(a->media_id);
111 if (m && !m->addr2str(a, addr_str, sizeof(addr_str)))
112 ret = scnprintf(buf, len, "%s(%s)", m->name, addr_str);
116 ret = scnprintf(buf, len, "UNKNOWN(%u)", a->media_id);
117 for (i = 0; i < sizeof(a->value); i++)
118 ret += scnprintf(buf + ret, len - ret,
125 * bearer_name_validate - validate & (optionally) deconstruct bearer name
126 * @name: ptr to bearer name string
127 * @name_parts: ptr to area for bearer name components (or NULL if not needed)
129 * Returns 1 if bearer name is valid, otherwise 0.
131 static int bearer_name_validate(const char *name,
132 struct tipc_bearer_names *name_parts)
134 char name_copy[TIPC_MAX_BEARER_NAME];
140 /* copy bearer name & ensure length is OK */
141 name_copy[TIPC_MAX_BEARER_NAME - 1] = 0;
142 /* need above in case non-Posix strncpy() doesn't pad with nulls */
143 strncpy(name_copy, name, TIPC_MAX_BEARER_NAME);
144 if (name_copy[TIPC_MAX_BEARER_NAME - 1] != 0)
147 /* ensure all component parts of bearer name are present */
148 media_name = name_copy;
149 if_name = strchr(media_name, ':');
153 media_len = if_name - media_name;
154 if_len = strlen(if_name) + 1;
156 /* validate component parts of bearer name */
157 if ((media_len <= 1) || (media_len > TIPC_MAX_MEDIA_NAME) ||
158 (if_len <= 1) || (if_len > TIPC_MAX_IF_NAME))
161 /* return bearer name components, if necessary */
163 strcpy(name_parts->media_name, media_name);
164 strcpy(name_parts->if_name, if_name);
170 * tipc_bearer_find - locates bearer object with matching bearer name
172 struct tipc_bearer *tipc_bearer_find(struct net *net, const char *name)
174 struct tipc_net *tn = net_generic(net, tipc_net_id);
175 struct tipc_bearer *b;
178 for (i = 0; i < MAX_BEARERS; i++) {
179 b = rtnl_dereference(tn->bearer_list[i]);
180 if (b && (!strcmp(b->name, name)))
186 /* tipc_bearer_get_name - get the bearer name from its id.
187 * @net: network namespace
188 * @name: a pointer to the buffer where the name will be stored.
189 * @bearer_id: the id to get the name from.
191 int tipc_bearer_get_name(struct net *net, char *name, u32 bearer_id)
193 struct tipc_net *tn = tipc_net(net);
194 struct tipc_bearer *b;
196 if (bearer_id >= MAX_BEARERS)
199 b = rtnl_dereference(tn->bearer_list[bearer_id]);
203 strcpy(name, b->name);
207 void tipc_bearer_add_dest(struct net *net, u32 bearer_id, u32 dest)
209 struct tipc_net *tn = net_generic(net, tipc_net_id);
210 struct tipc_bearer *b;
213 b = rcu_dereference(tn->bearer_list[bearer_id]);
215 tipc_disc_add_dest(b->disc);
219 void tipc_bearer_remove_dest(struct net *net, u32 bearer_id, u32 dest)
221 struct tipc_net *tn = net_generic(net, tipc_net_id);
222 struct tipc_bearer *b;
225 b = rcu_dereference(tn->bearer_list[bearer_id]);
227 tipc_disc_remove_dest(b->disc);
232 * tipc_enable_bearer - enable bearer with the given name
234 static int tipc_enable_bearer(struct net *net, const char *name,
235 u32 disc_domain, u32 prio,
236 struct nlattr *attr[])
238 struct tipc_net *tn = tipc_net(net);
239 struct tipc_bearer_names b_names;
240 int with_this_prio = 1;
241 struct tipc_bearer *b;
242 struct tipc_media *m;
248 if (!bearer_name_validate(name, &b_names)) {
249 errstr = "illegal name";
253 if (prio > TIPC_MAX_LINK_PRI && prio != TIPC_MEDIA_LINK_PRI) {
254 errstr = "illegal priority";
258 m = tipc_media_find(b_names.media_name);
260 errstr = "media not registered";
264 if (prio == TIPC_MEDIA_LINK_PRI)
267 /* Check new bearer vs existing ones and find free bearer id if any */
268 while (bearer_id < MAX_BEARERS) {
269 b = rtnl_dereference(tn->bearer_list[bearer_id]);
272 if (!strcmp(name, b->name)) {
273 errstr = "already enabled";
277 if (b->priority != prio)
279 if (++with_this_prio <= 2)
281 pr_warn("Bearer <%s>: already 2 bearers with priority %u\n",
283 if (prio == TIPC_MIN_LINK_PRI) {
284 errstr = "cannot adjust to lower";
287 pr_warn("Bearer <%s>: trying with adjusted priority\n", name);
293 if (bearer_id >= MAX_BEARERS) {
294 errstr = "max 3 bearers permitted";
298 b = kzalloc(sizeof(*b), GFP_ATOMIC);
302 strcpy(b->name, name);
304 res = m->enable_media(net, b, attr);
307 errstr = "failed to enable media";
311 b->identity = bearer_id;
312 b->tolerance = m->tolerance;
313 b->window = m->window;
314 b->domain = disc_domain;
315 b->net_plane = bearer_id + 'A';
317 test_and_set_bit_lock(0, &b->up);
319 res = tipc_disc_create(net, b, &b->bcast_addr, &skb);
321 bearer_disable(net, b);
322 errstr = "failed to create discoverer";
326 rcu_assign_pointer(tn->bearer_list[bearer_id], b);
328 tipc_bearer_xmit_skb(net, bearer_id, skb, &b->bcast_addr);
330 if (tipc_mon_create(net, bearer_id)) {
331 bearer_disable(net, b);
335 pr_info("Enabled bearer <%s>, priority %u\n", name, prio);
339 pr_warn("Enabling of bearer <%s> rejected, %s\n", name, errstr);
344 * tipc_reset_bearer - Reset all links established over this bearer
346 static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b)
348 pr_info("Resetting bearer <%s>\n", b->name);
349 tipc_node_delete_links(net, b->identity);
350 tipc_disc_reset(net, b);
357 * Note: This routine assumes caller holds RTNL lock.
359 static void bearer_disable(struct net *net, struct tipc_bearer *b)
361 struct tipc_net *tn = tipc_net(net);
362 int bearer_id = b->identity;
364 pr_info("Disabling bearer <%s>\n", b->name);
365 clear_bit_unlock(0, &b->up);
366 tipc_node_delete_links(net, bearer_id);
367 b->media->disable_media(b);
368 RCU_INIT_POINTER(b->media_ptr, NULL);
370 tipc_disc_delete(b->disc);
371 RCU_INIT_POINTER(tn->bearer_list[bearer_id], NULL);
373 tipc_mon_delete(net, bearer_id);
376 int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b,
377 struct nlattr *attr[])
379 char *dev_name = strchr((const char *)b->name, ':') + 1;
380 int hwaddr_len = b->media->hwaddr_len;
381 u8 node_id[NODE_ID_LEN] = {0,};
382 struct net_device *dev;
384 /* Find device with specified name */
385 dev = dev_get_by_name(net, dev_name);
388 if (tipc_mtu_bad(dev, 0)) {
392 if (dev == net->loopback_dev) {
394 pr_info("Enabling <%s> not permitted\n", b->name);
398 /* Autoconfigure own node identity if needed */
399 if (!tipc_own_id(net) && hwaddr_len <= NODE_ID_LEN) {
400 memcpy(node_id, dev->dev_addr, hwaddr_len);
401 tipc_net_init(net, node_id, 0);
403 if (!tipc_own_id(net)) {
405 pr_warn("Failed to obtain node identity\n");
409 /* Associate TIPC bearer with L2 bearer */
410 rcu_assign_pointer(b->media_ptr, dev);
412 b->pt.type = htons(ETH_P_TIPC);
413 b->pt.func = tipc_l2_rcv_msg;
414 dev_add_pack(&b->pt);
415 memset(&b->bcast_addr, 0, sizeof(b->bcast_addr));
416 memcpy(b->bcast_addr.value, dev->broadcast, hwaddr_len);
417 b->bcast_addr.media_id = b->media->type_id;
418 b->bcast_addr.broadcast = TIPC_BROADCAST_SUPPORT;
420 b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr);
421 rcu_assign_pointer(dev->tipc_ptr, b);
425 /* tipc_disable_l2_media - detach TIPC bearer from an L2 interface
427 * Mark L2 bearer as inactive so that incoming buffers are thrown away
429 void tipc_disable_l2_media(struct tipc_bearer *b)
431 struct net_device *dev;
433 dev = (struct net_device *)rtnl_dereference(b->media_ptr);
434 dev_remove_pack(&b->pt);
435 RCU_INIT_POINTER(dev->tipc_ptr, NULL);
441 * tipc_l2_send_msg - send a TIPC packet out over an L2 interface
442 * @skb: the packet to be sent
443 * @b: the bearer through which the packet is to be sent
444 * @dest: peer destination address
446 int tipc_l2_send_msg(struct net *net, struct sk_buff *skb,
447 struct tipc_bearer *b, struct tipc_media_addr *dest)
449 struct net_device *dev;
452 dev = (struct net_device *)rcu_dereference(b->media_ptr);
456 delta = SKB_DATA_ALIGN(dev->hard_header_len - skb_headroom(skb));
457 if ((delta > 0) && pskb_expand_head(skb, delta, 0, GFP_ATOMIC)) {
461 skb_reset_network_header(skb);
463 skb->protocol = htons(ETH_P_TIPC);
464 dev_hard_header(skb, dev, ETH_P_TIPC, dest->value,
465 dev->dev_addr, skb->len);
470 bool tipc_bearer_bcast_support(struct net *net, u32 bearer_id)
473 struct tipc_bearer *b;
476 b = bearer_get(net, bearer_id);
478 supp = (b->bcast_addr.broadcast == TIPC_BROADCAST_SUPPORT);
483 int tipc_bearer_mtu(struct net *net, u32 bearer_id)
486 struct tipc_bearer *b;
489 b = rcu_dereference(tipc_net(net)->bearer_list[bearer_id]);
496 /* tipc_bearer_xmit_skb - sends buffer to destination over bearer
498 void tipc_bearer_xmit_skb(struct net *net, u32 bearer_id,
500 struct tipc_media_addr *dest)
502 struct tipc_msg *hdr = buf_msg(skb);
503 struct tipc_bearer *b;
506 b = bearer_get(net, bearer_id);
507 if (likely(b && (test_bit(0, &b->up) || msg_is_reset(hdr))))
508 b->media->send_msg(net, skb, b, dest);
514 /* tipc_bearer_xmit() -send buffer to destination over bearer
516 void tipc_bearer_xmit(struct net *net, u32 bearer_id,
517 struct sk_buff_head *xmitq,
518 struct tipc_media_addr *dst)
520 struct tipc_bearer *b;
521 struct sk_buff *skb, *tmp;
523 if (skb_queue_empty(xmitq))
527 b = bearer_get(net, bearer_id);
529 __skb_queue_purge(xmitq);
530 skb_queue_walk_safe(xmitq, skb, tmp) {
531 __skb_dequeue(xmitq);
532 if (likely(test_bit(0, &b->up) || msg_is_reset(buf_msg(skb))))
533 b->media->send_msg(net, skb, b, dst);
540 /* tipc_bearer_bc_xmit() - broadcast buffers to all destinations
542 void tipc_bearer_bc_xmit(struct net *net, u32 bearer_id,
543 struct sk_buff_head *xmitq)
545 struct tipc_net *tn = tipc_net(net);
546 int net_id = tn->net_id;
547 struct tipc_bearer *b;
548 struct sk_buff *skb, *tmp;
549 struct tipc_msg *hdr;
552 b = bearer_get(net, bearer_id);
553 if (unlikely(!b || !test_bit(0, &b->up)))
554 __skb_queue_purge(xmitq);
555 skb_queue_walk_safe(xmitq, skb, tmp) {
557 msg_set_non_seq(hdr, 1);
558 msg_set_mc_netid(hdr, net_id);
559 __skb_dequeue(xmitq);
560 b->media->send_msg(net, skb, b, &b->bcast_addr);
566 * tipc_l2_rcv_msg - handle incoming TIPC message from an interface
567 * @buf: the received packet
568 * @dev: the net device that the packet was received on
569 * @pt: the packet_type structure which was used to register this handler
570 * @orig_dev: the original receive net device in case the device is a bond
572 * Accept only packets explicitly sent to this node, or broadcast packets;
573 * ignores packets sent using interface multicast, and traffic sent to other
574 * nodes (which can happen if interface is running in promiscuous mode).
576 static int tipc_l2_rcv_msg(struct sk_buff *skb, struct net_device *dev,
577 struct packet_type *pt, struct net_device *orig_dev)
579 struct tipc_bearer *b;
582 b = rcu_dereference(dev->tipc_ptr) ?:
583 rcu_dereference(orig_dev->tipc_ptr);
584 if (likely(b && test_bit(0, &b->up) &&
585 (skb->pkt_type <= PACKET_MULTICAST))) {
586 skb_mark_not_on_list(skb);
587 tipc_rcv(dev_net(b->pt.dev), skb, b);
589 return NET_RX_SUCCESS;
597 * tipc_l2_device_event - handle device events from network device
598 * @nb: the context of the notification
599 * @evt: the type of event
600 * @ptr: the net device that the event was on
602 * This function is called by the Ethernet driver in case of link
605 static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt,
608 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
609 struct net *net = dev_net(dev);
610 struct tipc_bearer *b;
612 b = rtnl_dereference(dev->tipc_ptr);
616 trace_tipc_l2_device_event(dev, b, evt);
619 if (netif_carrier_ok(dev) && netif_oper_up(dev)) {
620 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);
629 test_and_set_bit_lock(0, &b->up);
631 case NETDEV_CHANGEMTU:
632 if (tipc_mtu_bad(dev, 0)) {
633 bearer_disable(net, b);
637 tipc_reset_bearer(net, b);
639 case NETDEV_CHANGEADDR:
640 b->media->raw2addr(b, &b->addr,
641 (char *)dev->dev_addr);
642 tipc_reset_bearer(net, b);
644 case NETDEV_UNREGISTER:
645 case NETDEV_CHANGENAME:
646 bearer_disable(net, b);
652 static struct notifier_block notifier = {
653 .notifier_call = tipc_l2_device_event,
657 int tipc_bearer_setup(void)
659 return register_netdevice_notifier(¬ifier);
662 void tipc_bearer_cleanup(void)
664 unregister_netdevice_notifier(¬ifier);
667 void tipc_bearer_stop(struct net *net)
669 struct tipc_net *tn = net_generic(net, tipc_net_id);
670 struct tipc_bearer *b;
673 for (i = 0; i < MAX_BEARERS; i++) {
674 b = rtnl_dereference(tn->bearer_list[i]);
676 bearer_disable(net, b);
677 tn->bearer_list[i] = NULL;
682 void tipc_clone_to_loopback(struct net *net, struct sk_buff_head *pkts)
684 struct net_device *dev = net->loopback_dev;
685 struct sk_buff *skb, *_skb;
688 skb_queue_walk(pkts, _skb) {
689 skb = pskb_copy(_skb, GFP_ATOMIC);
693 exp = SKB_DATA_ALIGN(dev->hard_header_len - skb_headroom(skb));
694 if (exp > 0 && pskb_expand_head(skb, exp, 0, GFP_ATOMIC)) {
699 skb_reset_network_header(skb);
700 dev_hard_header(skb, dev, ETH_P_TIPC, dev->dev_addr,
701 dev->dev_addr, skb->len);
703 skb->pkt_type = PACKET_HOST;
704 skb->ip_summed = CHECKSUM_UNNECESSARY;
705 skb->protocol = eth_type_trans(skb, dev);
710 static int tipc_loopback_rcv_pkt(struct sk_buff *skb, struct net_device *dev,
711 struct packet_type *pt, struct net_device *od)
714 return NET_RX_SUCCESS;
717 int tipc_attach_loopback(struct net *net)
719 struct net_device *dev = net->loopback_dev;
720 struct tipc_net *tn = tipc_net(net);
726 tn->loopback_pt.dev = dev;
727 tn->loopback_pt.type = htons(ETH_P_TIPC);
728 tn->loopback_pt.func = tipc_loopback_rcv_pkt;
729 dev_add_pack(&tn->loopback_pt);
733 void tipc_detach_loopback(struct net *net)
735 struct tipc_net *tn = tipc_net(net);
737 dev_remove_pack(&tn->loopback_pt);
738 dev_put(net->loopback_dev);
741 /* Caller should hold rtnl_lock to protect the bearer */
742 static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg,
743 struct tipc_bearer *bearer, int nlflags)
746 struct nlattr *attrs;
749 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
750 nlflags, TIPC_NL_BEARER_GET);
754 attrs = nla_nest_start_noflag(msg->skb, TIPC_NLA_BEARER);
758 if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name))
761 prop = nla_nest_start_noflag(msg->skb, TIPC_NLA_BEARER_PROP);
764 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority))
766 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance))
768 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window))
770 if (bearer->media->type_id == TIPC_MEDIA_TYPE_UDP)
771 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_MTU, bearer->mtu))
774 nla_nest_end(msg->skb, prop);
776 #ifdef CONFIG_TIPC_MEDIA_UDP
777 if (bearer->media->type_id == TIPC_MEDIA_TYPE_UDP) {
778 if (tipc_udp_nl_add_bearer_data(msg, bearer))
783 nla_nest_end(msg->skb, attrs);
784 genlmsg_end(msg->skb, hdr);
789 nla_nest_cancel(msg->skb, prop);
791 nla_nest_cancel(msg->skb, attrs);
793 genlmsg_cancel(msg->skb, hdr);
798 int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb)
802 struct tipc_bearer *bearer;
803 struct tipc_nl_msg msg;
804 struct net *net = sock_net(skb->sk);
805 struct tipc_net *tn = net_generic(net, tipc_net_id);
807 if (i == MAX_BEARERS)
811 msg.portid = NETLINK_CB(cb->skb).portid;
812 msg.seq = cb->nlh->nlmsg_seq;
815 for (i = 0; i < MAX_BEARERS; i++) {
816 bearer = rtnl_dereference(tn->bearer_list[i]);
820 err = __tipc_nl_add_bearer(&msg, bearer, NLM_F_MULTI);
830 int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info)
835 struct tipc_bearer *bearer;
836 struct tipc_nl_msg msg;
837 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
838 struct net *net = genl_info_net(info);
840 if (!info->attrs[TIPC_NLA_BEARER])
843 err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX,
844 info->attrs[TIPC_NLA_BEARER],
845 tipc_nl_bearer_policy, info->extack);
849 if (!attrs[TIPC_NLA_BEARER_NAME])
851 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
853 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
858 msg.portid = info->snd_portid;
859 msg.seq = info->snd_seq;
862 bearer = tipc_bearer_find(net, name);
868 err = __tipc_nl_add_bearer(&msg, bearer, 0);
873 return genlmsg_reply(rep, info);
881 int __tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info)
885 struct tipc_bearer *bearer;
886 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
887 struct net *net = sock_net(skb->sk);
889 if (!info->attrs[TIPC_NLA_BEARER])
892 err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX,
893 info->attrs[TIPC_NLA_BEARER],
894 tipc_nl_bearer_policy, info->extack);
898 if (!attrs[TIPC_NLA_BEARER_NAME])
901 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
903 bearer = tipc_bearer_find(net, name);
907 bearer_disable(net, bearer);
912 int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info)
917 err = __tipc_nl_bearer_disable(skb, info);
923 int __tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
927 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
928 struct net *net = sock_net(skb->sk);
932 prio = TIPC_MEDIA_LINK_PRI;
934 if (!info->attrs[TIPC_NLA_BEARER])
937 err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX,
938 info->attrs[TIPC_NLA_BEARER],
939 tipc_nl_bearer_policy, info->extack);
943 if (!attrs[TIPC_NLA_BEARER_NAME])
946 bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
948 if (attrs[TIPC_NLA_BEARER_DOMAIN])
949 domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]);
951 if (attrs[TIPC_NLA_BEARER_PROP]) {
952 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
954 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
959 if (props[TIPC_NLA_PROP_PRIO])
960 prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
963 return tipc_enable_bearer(net, bearer, domain, prio, attrs);
966 int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
971 err = __tipc_nl_bearer_enable(skb, info);
977 int tipc_nl_bearer_add(struct sk_buff *skb, struct genl_info *info)
981 struct tipc_bearer *b;
982 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
983 struct net *net = sock_net(skb->sk);
985 if (!info->attrs[TIPC_NLA_BEARER])
988 err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX,
989 info->attrs[TIPC_NLA_BEARER],
990 tipc_nl_bearer_policy, info->extack);
994 if (!attrs[TIPC_NLA_BEARER_NAME])
996 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
999 b = tipc_bearer_find(net, name);
1005 #ifdef CONFIG_TIPC_MEDIA_UDP
1006 if (attrs[TIPC_NLA_BEARER_UDP_OPTS]) {
1007 err = tipc_udp_nl_bearer_add(b,
1008 attrs[TIPC_NLA_BEARER_UDP_OPTS]);
1020 int __tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
1022 struct tipc_bearer *b;
1023 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1024 struct net *net = sock_net(skb->sk);
1028 if (!info->attrs[TIPC_NLA_BEARER])
1031 err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX,
1032 info->attrs[TIPC_NLA_BEARER],
1033 tipc_nl_bearer_policy, info->extack);
1037 if (!attrs[TIPC_NLA_BEARER_NAME])
1039 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
1041 b = tipc_bearer_find(net, name);
1045 if (attrs[TIPC_NLA_BEARER_PROP]) {
1046 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
1048 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
1053 if (props[TIPC_NLA_PROP_TOL]) {
1054 b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
1055 tipc_node_apply_property(net, b, TIPC_NLA_PROP_TOL);
1057 if (props[TIPC_NLA_PROP_PRIO])
1058 b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
1059 if (props[TIPC_NLA_PROP_WIN])
1060 b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
1061 if (props[TIPC_NLA_PROP_MTU]) {
1062 if (b->media->type_id != TIPC_MEDIA_TYPE_UDP)
1064 #ifdef CONFIG_TIPC_MEDIA_UDP
1065 if (tipc_udp_mtu_bad(nla_get_u32
1066 (props[TIPC_NLA_PROP_MTU])))
1068 b->mtu = nla_get_u32(props[TIPC_NLA_PROP_MTU]);
1069 tipc_node_apply_property(net, b, TIPC_NLA_PROP_MTU);
1077 int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
1082 err = __tipc_nl_bearer_set(skb, info);
1088 static int __tipc_nl_add_media(struct tipc_nl_msg *msg,
1089 struct tipc_media *media, int nlflags)
1092 struct nlattr *attrs;
1093 struct nlattr *prop;
1095 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
1096 nlflags, TIPC_NL_MEDIA_GET);
1100 attrs = nla_nest_start_noflag(msg->skb, TIPC_NLA_MEDIA);
1104 if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name))
1107 prop = nla_nest_start_noflag(msg->skb, TIPC_NLA_MEDIA_PROP);
1110 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority))
1112 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance))
1114 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window))
1116 if (media->type_id == TIPC_MEDIA_TYPE_UDP)
1117 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_MTU, media->mtu))
1120 nla_nest_end(msg->skb, prop);
1121 nla_nest_end(msg->skb, attrs);
1122 genlmsg_end(msg->skb, hdr);
1127 nla_nest_cancel(msg->skb, prop);
1129 nla_nest_cancel(msg->skb, attrs);
1131 genlmsg_cancel(msg->skb, hdr);
1136 int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb)
1139 int i = cb->args[0];
1140 struct tipc_nl_msg msg;
1146 msg.portid = NETLINK_CB(cb->skb).portid;
1147 msg.seq = cb->nlh->nlmsg_seq;
1150 for (; media_info_array[i] != NULL; i++) {
1151 err = __tipc_nl_add_media(&msg, media_info_array[i],
1162 int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info)
1166 struct tipc_nl_msg msg;
1167 struct tipc_media *media;
1168 struct sk_buff *rep;
1169 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1171 if (!info->attrs[TIPC_NLA_MEDIA])
1174 err = nla_parse_nested_deprecated(attrs, TIPC_NLA_MEDIA_MAX,
1175 info->attrs[TIPC_NLA_MEDIA],
1176 tipc_nl_media_policy, info->extack);
1180 if (!attrs[TIPC_NLA_MEDIA_NAME])
1182 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1184 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1189 msg.portid = info->snd_portid;
1190 msg.seq = info->snd_seq;
1193 media = tipc_media_find(name);
1199 err = __tipc_nl_add_media(&msg, media, 0);
1204 return genlmsg_reply(rep, info);
1212 int __tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
1216 struct tipc_media *m;
1217 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1219 if (!info->attrs[TIPC_NLA_MEDIA])
1222 err = nla_parse_nested_deprecated(attrs, TIPC_NLA_MEDIA_MAX,
1223 info->attrs[TIPC_NLA_MEDIA],
1224 tipc_nl_media_policy, info->extack);
1226 if (!attrs[TIPC_NLA_MEDIA_NAME])
1228 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1230 m = tipc_media_find(name);
1234 if (attrs[TIPC_NLA_MEDIA_PROP]) {
1235 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
1237 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP],
1242 if (props[TIPC_NLA_PROP_TOL])
1243 m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
1244 if (props[TIPC_NLA_PROP_PRIO])
1245 m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
1246 if (props[TIPC_NLA_PROP_WIN])
1247 m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
1248 if (props[TIPC_NLA_PROP_MTU]) {
1249 if (m->type_id != TIPC_MEDIA_TYPE_UDP)
1251 #ifdef CONFIG_TIPC_MEDIA_UDP
1252 if (tipc_udp_mtu_bad(nla_get_u32
1253 (props[TIPC_NLA_PROP_MTU])))
1255 m->mtu = nla_get_u32(props[TIPC_NLA_PROP_MTU]);
1263 int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
1268 err = __tipc_nl_media_set(skb, info);