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.
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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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[],
237 struct netlink_ext_ack *extack)
239 struct tipc_net *tn = tipc_net(net);
240 struct tipc_bearer_names b_names;
241 int with_this_prio = 1;
242 struct tipc_bearer *b;
243 struct tipc_media *m;
250 if (!bearer_name_validate(name, &b_names)) {
251 NL_SET_ERR_MSG(extack, "Illegal name");
255 if (prio > TIPC_MAX_LINK_PRI && prio != TIPC_MEDIA_LINK_PRI) {
256 errstr = "illegal priority";
257 NL_SET_ERR_MSG(extack, "Illegal priority");
261 m = tipc_media_find(b_names.media_name);
263 errstr = "media not registered";
264 NL_SET_ERR_MSG(extack, "Media not registered");
268 if (prio == TIPC_MEDIA_LINK_PRI)
271 /* Check new bearer vs existing ones and find free bearer id if any */
272 bearer_id = MAX_BEARERS;
275 b = rtnl_dereference(tn->bearer_list[i]);
280 if (!strcmp(name, b->name)) {
281 errstr = "already enabled";
282 NL_SET_ERR_MSG(extack, "Already enabled");
286 if (b->priority == prio &&
287 (++with_this_prio > 2)) {
288 pr_warn("Bearer <%s>: already 2 bearers with priority %u\n",
291 if (prio == TIPC_MIN_LINK_PRI) {
292 errstr = "cannot adjust to lower";
293 NL_SET_ERR_MSG(extack, "Cannot adjust to lower");
297 pr_warn("Bearer <%s>: trying with adjusted priority\n",
300 bearer_id = MAX_BEARERS;
306 if (bearer_id >= MAX_BEARERS) {
307 errstr = "max 3 bearers permitted";
308 NL_SET_ERR_MSG(extack, "Max 3 bearers permitted");
312 b = kzalloc(sizeof(*b), GFP_ATOMIC);
316 strcpy(b->name, name);
318 res = m->enable_media(net, b, attr);
321 errstr = "failed to enable media";
322 NL_SET_ERR_MSG(extack, "Failed to enable media");
326 b->identity = bearer_id;
327 b->tolerance = m->tolerance;
328 b->window = m->window;
329 b->domain = disc_domain;
330 b->net_plane = bearer_id + 'A';
332 test_and_set_bit_lock(0, &b->up);
334 res = tipc_disc_create(net, b, &b->bcast_addr, &skb);
336 bearer_disable(net, b);
337 errstr = "failed to create discoverer";
338 NL_SET_ERR_MSG(extack, "Failed to create discoverer");
342 rcu_assign_pointer(tn->bearer_list[bearer_id], b);
344 tipc_bearer_xmit_skb(net, bearer_id, skb, &b->bcast_addr);
346 if (tipc_mon_create(net, bearer_id)) {
347 bearer_disable(net, b);
351 pr_info("Enabled bearer <%s>, priority %u\n", name, prio);
355 pr_warn("Enabling of bearer <%s> rejected, %s\n", name, errstr);
360 * tipc_reset_bearer - Reset all links established over this bearer
362 static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b)
364 pr_info("Resetting bearer <%s>\n", b->name);
365 tipc_node_delete_links(net, b->identity);
366 tipc_disc_reset(net, b);
373 * Note: This routine assumes caller holds RTNL lock.
375 static void bearer_disable(struct net *net, struct tipc_bearer *b)
377 struct tipc_net *tn = tipc_net(net);
378 int bearer_id = b->identity;
380 pr_info("Disabling bearer <%s>\n", b->name);
381 clear_bit_unlock(0, &b->up);
382 tipc_node_delete_links(net, bearer_id);
383 b->media->disable_media(b);
384 RCU_INIT_POINTER(b->media_ptr, NULL);
386 tipc_disc_delete(b->disc);
387 RCU_INIT_POINTER(tn->bearer_list[bearer_id], NULL);
389 tipc_mon_delete(net, bearer_id);
392 int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b,
393 struct nlattr *attr[])
395 char *dev_name = strchr((const char *)b->name, ':') + 1;
396 int hwaddr_len = b->media->hwaddr_len;
397 u8 node_id[NODE_ID_LEN] = {0,};
398 struct net_device *dev;
400 /* Find device with specified name */
401 dev = dev_get_by_name(net, dev_name);
404 if (tipc_mtu_bad(dev, 0)) {
408 if (dev == net->loopback_dev) {
410 pr_info("Enabling <%s> not permitted\n", b->name);
414 /* Autoconfigure own node identity if needed */
415 if (!tipc_own_id(net) && hwaddr_len <= NODE_ID_LEN) {
416 memcpy(node_id, dev->dev_addr, hwaddr_len);
417 tipc_net_init(net, node_id, 0);
419 if (!tipc_own_id(net)) {
421 pr_warn("Failed to obtain node identity\n");
425 /* Associate TIPC bearer with L2 bearer */
426 rcu_assign_pointer(b->media_ptr, dev);
428 b->pt.type = htons(ETH_P_TIPC);
429 b->pt.func = tipc_l2_rcv_msg;
430 dev_add_pack(&b->pt);
431 memset(&b->bcast_addr, 0, sizeof(b->bcast_addr));
432 memcpy(b->bcast_addr.value, dev->broadcast, hwaddr_len);
433 b->bcast_addr.media_id = b->media->type_id;
434 b->bcast_addr.broadcast = TIPC_BROADCAST_SUPPORT;
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 dev_remove_pack(&b->pt);
451 RCU_INIT_POINTER(dev->tipc_ptr, NULL);
457 * tipc_l2_send_msg - send a TIPC packet out over an L2 interface
458 * @skb: the packet to be sent
459 * @b: the bearer through which the packet is to be sent
460 * @dest: peer destination address
462 int tipc_l2_send_msg(struct net *net, struct sk_buff *skb,
463 struct tipc_bearer *b, struct tipc_media_addr *dest)
465 struct net_device *dev;
468 dev = (struct net_device *)rcu_dereference(b->media_ptr);
472 delta = SKB_DATA_ALIGN(dev->hard_header_len - skb_headroom(skb));
473 if ((delta > 0) && pskb_expand_head(skb, delta, 0, GFP_ATOMIC)) {
477 skb_reset_network_header(skb);
479 skb->protocol = htons(ETH_P_TIPC);
480 dev_hard_header(skb, dev, ETH_P_TIPC, dest->value,
481 dev->dev_addr, skb->len);
486 bool tipc_bearer_bcast_support(struct net *net, u32 bearer_id)
489 struct tipc_bearer *b;
492 b = bearer_get(net, bearer_id);
494 supp = (b->bcast_addr.broadcast == TIPC_BROADCAST_SUPPORT);
499 int tipc_bearer_mtu(struct net *net, u32 bearer_id)
502 struct tipc_bearer *b;
505 b = rcu_dereference(tipc_net(net)->bearer_list[bearer_id]);
512 /* tipc_bearer_xmit_skb - sends buffer to destination over bearer
514 void tipc_bearer_xmit_skb(struct net *net, u32 bearer_id,
516 struct tipc_media_addr *dest)
518 struct tipc_msg *hdr = buf_msg(skb);
519 struct tipc_bearer *b;
522 b = bearer_get(net, bearer_id);
523 if (likely(b && (test_bit(0, &b->up) || msg_is_reset(hdr))))
524 b->media->send_msg(net, skb, b, dest);
530 /* tipc_bearer_xmit() -send buffer to destination over bearer
532 void tipc_bearer_xmit(struct net *net, u32 bearer_id,
533 struct sk_buff_head *xmitq,
534 struct tipc_media_addr *dst)
536 struct tipc_bearer *b;
537 struct sk_buff *skb, *tmp;
539 if (skb_queue_empty(xmitq))
543 b = bearer_get(net, bearer_id);
545 __skb_queue_purge(xmitq);
546 skb_queue_walk_safe(xmitq, skb, tmp) {
547 __skb_dequeue(xmitq);
548 if (likely(test_bit(0, &b->up) || msg_is_reset(buf_msg(skb))))
549 b->media->send_msg(net, skb, b, dst);
556 /* tipc_bearer_bc_xmit() - broadcast buffers to all destinations
558 void tipc_bearer_bc_xmit(struct net *net, u32 bearer_id,
559 struct sk_buff_head *xmitq)
561 struct tipc_net *tn = tipc_net(net);
562 int net_id = tn->net_id;
563 struct tipc_bearer *b;
564 struct sk_buff *skb, *tmp;
565 struct tipc_msg *hdr;
568 b = bearer_get(net, bearer_id);
569 if (unlikely(!b || !test_bit(0, &b->up)))
570 __skb_queue_purge(xmitq);
571 skb_queue_walk_safe(xmitq, skb, tmp) {
573 msg_set_non_seq(hdr, 1);
574 msg_set_mc_netid(hdr, net_id);
575 __skb_dequeue(xmitq);
576 b->media->send_msg(net, skb, b, &b->bcast_addr);
582 * tipc_l2_rcv_msg - handle incoming TIPC message from an interface
583 * @buf: the received packet
584 * @dev: the net device that the packet was received on
585 * @pt: the packet_type structure which was used to register this handler
586 * @orig_dev: the original receive net device in case the device is a bond
588 * Accept only packets explicitly sent to this node, or broadcast packets;
589 * ignores packets sent using interface multicast, and traffic sent to other
590 * nodes (which can happen if interface is running in promiscuous mode).
592 static int tipc_l2_rcv_msg(struct sk_buff *skb, struct net_device *dev,
593 struct packet_type *pt, struct net_device *orig_dev)
595 struct tipc_bearer *b;
598 b = rcu_dereference(dev->tipc_ptr) ?:
599 rcu_dereference(orig_dev->tipc_ptr);
600 if (likely(b && test_bit(0, &b->up) &&
601 (skb->pkt_type <= PACKET_MULTICAST))) {
602 skb_mark_not_on_list(skb);
603 tipc_rcv(dev_net(b->pt.dev), skb, b);
605 return NET_RX_SUCCESS;
613 * tipc_l2_device_event - handle device events from network device
614 * @nb: the context of the notification
615 * @evt: the type of event
616 * @ptr: the net device that the event was on
618 * This function is called by the Ethernet driver in case of link
621 static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt,
624 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
625 struct net *net = dev_net(dev);
626 struct tipc_bearer *b;
628 b = rtnl_dereference(dev->tipc_ptr);
632 trace_tipc_l2_device_event(dev, b, evt);
635 if (netif_carrier_ok(dev) && netif_oper_up(dev)) {
636 test_and_set_bit_lock(0, &b->up);
640 case NETDEV_GOING_DOWN:
641 clear_bit_unlock(0, &b->up);
642 tipc_reset_bearer(net, b);
645 test_and_set_bit_lock(0, &b->up);
647 case NETDEV_CHANGEMTU:
648 if (tipc_mtu_bad(dev, 0)) {
649 bearer_disable(net, b);
653 tipc_reset_bearer(net, b);
655 case NETDEV_CHANGEADDR:
656 b->media->raw2addr(b, &b->addr,
657 (char *)dev->dev_addr);
658 tipc_reset_bearer(net, b);
660 case NETDEV_UNREGISTER:
661 case NETDEV_CHANGENAME:
662 bearer_disable(net, b);
668 static struct notifier_block notifier = {
669 .notifier_call = tipc_l2_device_event,
673 int tipc_bearer_setup(void)
675 return register_netdevice_notifier(¬ifier);
678 void tipc_bearer_cleanup(void)
680 unregister_netdevice_notifier(¬ifier);
683 void tipc_bearer_stop(struct net *net)
685 struct tipc_net *tn = net_generic(net, tipc_net_id);
686 struct tipc_bearer *b;
689 for (i = 0; i < MAX_BEARERS; i++) {
690 b = rtnl_dereference(tn->bearer_list[i]);
692 bearer_disable(net, b);
693 tn->bearer_list[i] = NULL;
698 void tipc_clone_to_loopback(struct net *net, struct sk_buff_head *pkts)
700 struct net_device *dev = net->loopback_dev;
701 struct sk_buff *skb, *_skb;
704 skb_queue_walk(pkts, _skb) {
705 skb = pskb_copy(_skb, GFP_ATOMIC);
709 exp = SKB_DATA_ALIGN(dev->hard_header_len - skb_headroom(skb));
710 if (exp > 0 && pskb_expand_head(skb, exp, 0, GFP_ATOMIC)) {
715 skb_reset_network_header(skb);
716 dev_hard_header(skb, dev, ETH_P_TIPC, dev->dev_addr,
717 dev->dev_addr, skb->len);
719 skb->pkt_type = PACKET_HOST;
720 skb->ip_summed = CHECKSUM_UNNECESSARY;
721 skb->protocol = eth_type_trans(skb, dev);
726 static int tipc_loopback_rcv_pkt(struct sk_buff *skb, struct net_device *dev,
727 struct packet_type *pt, struct net_device *od)
730 return NET_RX_SUCCESS;
733 int tipc_attach_loopback(struct net *net)
735 struct net_device *dev = net->loopback_dev;
736 struct tipc_net *tn = tipc_net(net);
742 tn->loopback_pt.dev = dev;
743 tn->loopback_pt.type = htons(ETH_P_TIPC);
744 tn->loopback_pt.func = tipc_loopback_rcv_pkt;
745 dev_add_pack(&tn->loopback_pt);
749 void tipc_detach_loopback(struct net *net)
751 struct tipc_net *tn = tipc_net(net);
753 dev_remove_pack(&tn->loopback_pt);
754 dev_put(net->loopback_dev);
757 /* Caller should hold rtnl_lock to protect the bearer */
758 static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg,
759 struct tipc_bearer *bearer, int nlflags)
762 struct nlattr *attrs;
765 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
766 nlflags, TIPC_NL_BEARER_GET);
770 attrs = nla_nest_start_noflag(msg->skb, TIPC_NLA_BEARER);
774 if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name))
777 prop = nla_nest_start_noflag(msg->skb, TIPC_NLA_BEARER_PROP);
780 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority))
782 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance))
784 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window))
786 if (bearer->media->type_id == TIPC_MEDIA_TYPE_UDP)
787 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_MTU, bearer->mtu))
790 nla_nest_end(msg->skb, prop);
792 #ifdef CONFIG_TIPC_MEDIA_UDP
793 if (bearer->media->type_id == TIPC_MEDIA_TYPE_UDP) {
794 if (tipc_udp_nl_add_bearer_data(msg, bearer))
799 nla_nest_end(msg->skb, attrs);
800 genlmsg_end(msg->skb, hdr);
805 nla_nest_cancel(msg->skb, prop);
807 nla_nest_cancel(msg->skb, attrs);
809 genlmsg_cancel(msg->skb, hdr);
814 int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb)
818 struct tipc_bearer *bearer;
819 struct tipc_nl_msg msg;
820 struct net *net = sock_net(skb->sk);
821 struct tipc_net *tn = net_generic(net, tipc_net_id);
823 if (i == MAX_BEARERS)
827 msg.portid = NETLINK_CB(cb->skb).portid;
828 msg.seq = cb->nlh->nlmsg_seq;
831 for (i = 0; i < MAX_BEARERS; i++) {
832 bearer = rtnl_dereference(tn->bearer_list[i]);
836 err = __tipc_nl_add_bearer(&msg, bearer, NLM_F_MULTI);
846 int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info)
851 struct tipc_bearer *bearer;
852 struct tipc_nl_msg msg;
853 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
854 struct net *net = genl_info_net(info);
856 if (!info->attrs[TIPC_NLA_BEARER])
859 err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX,
860 info->attrs[TIPC_NLA_BEARER],
861 tipc_nl_bearer_policy, info->extack);
865 if (!attrs[TIPC_NLA_BEARER_NAME])
867 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
869 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
874 msg.portid = info->snd_portid;
875 msg.seq = info->snd_seq;
878 bearer = tipc_bearer_find(net, name);
881 NL_SET_ERR_MSG(info->extack, "Bearer not found");
885 err = __tipc_nl_add_bearer(&msg, bearer, 0);
890 return genlmsg_reply(rep, info);
898 int __tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info)
902 struct tipc_bearer *bearer;
903 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
904 struct net *net = sock_net(skb->sk);
906 if (!info->attrs[TIPC_NLA_BEARER])
909 err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX,
910 info->attrs[TIPC_NLA_BEARER],
911 tipc_nl_bearer_policy, info->extack);
915 if (!attrs[TIPC_NLA_BEARER_NAME])
918 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
920 bearer = tipc_bearer_find(net, name);
922 NL_SET_ERR_MSG(info->extack, "Bearer not found");
926 bearer_disable(net, bearer);
931 int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info)
936 err = __tipc_nl_bearer_disable(skb, info);
942 int __tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
946 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
947 struct net *net = sock_net(skb->sk);
951 prio = TIPC_MEDIA_LINK_PRI;
953 if (!info->attrs[TIPC_NLA_BEARER])
956 err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX,
957 info->attrs[TIPC_NLA_BEARER],
958 tipc_nl_bearer_policy, info->extack);
962 if (!attrs[TIPC_NLA_BEARER_NAME])
965 bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
967 if (attrs[TIPC_NLA_BEARER_DOMAIN])
968 domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]);
970 if (attrs[TIPC_NLA_BEARER_PROP]) {
971 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
973 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
978 if (props[TIPC_NLA_PROP_PRIO])
979 prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
982 return tipc_enable_bearer(net, bearer, domain, prio, attrs,
986 int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
991 err = __tipc_nl_bearer_enable(skb, info);
997 int tipc_nl_bearer_add(struct sk_buff *skb, struct genl_info *info)
1001 struct tipc_bearer *b;
1002 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1003 struct net *net = sock_net(skb->sk);
1005 if (!info->attrs[TIPC_NLA_BEARER])
1008 err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX,
1009 info->attrs[TIPC_NLA_BEARER],
1010 tipc_nl_bearer_policy, info->extack);
1014 if (!attrs[TIPC_NLA_BEARER_NAME])
1016 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
1019 b = tipc_bearer_find(net, name);
1022 NL_SET_ERR_MSG(info->extack, "Bearer not found");
1026 #ifdef CONFIG_TIPC_MEDIA_UDP
1027 if (attrs[TIPC_NLA_BEARER_UDP_OPTS]) {
1028 err = tipc_udp_nl_bearer_add(b,
1029 attrs[TIPC_NLA_BEARER_UDP_OPTS]);
1041 int __tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
1043 struct tipc_bearer *b;
1044 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1045 struct net *net = sock_net(skb->sk);
1049 if (!info->attrs[TIPC_NLA_BEARER])
1052 err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX,
1053 info->attrs[TIPC_NLA_BEARER],
1054 tipc_nl_bearer_policy, info->extack);
1058 if (!attrs[TIPC_NLA_BEARER_NAME])
1060 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
1062 b = tipc_bearer_find(net, name);
1064 NL_SET_ERR_MSG(info->extack, "Bearer not found");
1068 if (attrs[TIPC_NLA_BEARER_PROP]) {
1069 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
1071 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
1076 if (props[TIPC_NLA_PROP_TOL]) {
1077 b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
1078 tipc_node_apply_property(net, b, TIPC_NLA_PROP_TOL);
1080 if (props[TIPC_NLA_PROP_PRIO])
1081 b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
1082 if (props[TIPC_NLA_PROP_WIN])
1083 b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
1084 if (props[TIPC_NLA_PROP_MTU]) {
1085 if (b->media->type_id != TIPC_MEDIA_TYPE_UDP) {
1086 NL_SET_ERR_MSG(info->extack,
1087 "MTU property is unsupported");
1090 #ifdef CONFIG_TIPC_MEDIA_UDP
1091 if (tipc_udp_mtu_bad(nla_get_u32
1092 (props[TIPC_NLA_PROP_MTU]))) {
1093 NL_SET_ERR_MSG(info->extack,
1094 "MTU value is out-of-range");
1097 b->mtu = nla_get_u32(props[TIPC_NLA_PROP_MTU]);
1098 tipc_node_apply_property(net, b, TIPC_NLA_PROP_MTU);
1106 int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
1111 err = __tipc_nl_bearer_set(skb, info);
1117 static int __tipc_nl_add_media(struct tipc_nl_msg *msg,
1118 struct tipc_media *media, int nlflags)
1121 struct nlattr *attrs;
1122 struct nlattr *prop;
1124 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
1125 nlflags, TIPC_NL_MEDIA_GET);
1129 attrs = nla_nest_start_noflag(msg->skb, TIPC_NLA_MEDIA);
1133 if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name))
1136 prop = nla_nest_start_noflag(msg->skb, TIPC_NLA_MEDIA_PROP);
1139 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority))
1141 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance))
1143 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window))
1145 if (media->type_id == TIPC_MEDIA_TYPE_UDP)
1146 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_MTU, media->mtu))
1149 nla_nest_end(msg->skb, prop);
1150 nla_nest_end(msg->skb, attrs);
1151 genlmsg_end(msg->skb, hdr);
1156 nla_nest_cancel(msg->skb, prop);
1158 nla_nest_cancel(msg->skb, attrs);
1160 genlmsg_cancel(msg->skb, hdr);
1165 int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb)
1168 int i = cb->args[0];
1169 struct tipc_nl_msg msg;
1175 msg.portid = NETLINK_CB(cb->skb).portid;
1176 msg.seq = cb->nlh->nlmsg_seq;
1179 for (; media_info_array[i] != NULL; i++) {
1180 err = __tipc_nl_add_media(&msg, media_info_array[i],
1191 int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info)
1195 struct tipc_nl_msg msg;
1196 struct tipc_media *media;
1197 struct sk_buff *rep;
1198 struct nlattr *attrs[TIPC_NLA_MEDIA_MAX + 1];
1200 if (!info->attrs[TIPC_NLA_MEDIA])
1203 err = nla_parse_nested_deprecated(attrs, TIPC_NLA_MEDIA_MAX,
1204 info->attrs[TIPC_NLA_MEDIA],
1205 tipc_nl_media_policy, info->extack);
1209 if (!attrs[TIPC_NLA_MEDIA_NAME])
1211 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1213 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1218 msg.portid = info->snd_portid;
1219 msg.seq = info->snd_seq;
1222 media = tipc_media_find(name);
1224 NL_SET_ERR_MSG(info->extack, "Media not found");
1229 err = __tipc_nl_add_media(&msg, media, 0);
1234 return genlmsg_reply(rep, info);
1242 int __tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
1246 struct tipc_media *m;
1247 struct nlattr *attrs[TIPC_NLA_MEDIA_MAX + 1];
1249 if (!info->attrs[TIPC_NLA_MEDIA])
1252 err = nla_parse_nested_deprecated(attrs, TIPC_NLA_MEDIA_MAX,
1253 info->attrs[TIPC_NLA_MEDIA],
1254 tipc_nl_media_policy, info->extack);
1256 if (!attrs[TIPC_NLA_MEDIA_NAME])
1258 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1260 m = tipc_media_find(name);
1262 NL_SET_ERR_MSG(info->extack, "Media not found");
1265 if (attrs[TIPC_NLA_MEDIA_PROP]) {
1266 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
1268 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP],
1273 if (props[TIPC_NLA_PROP_TOL])
1274 m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
1275 if (props[TIPC_NLA_PROP_PRIO])
1276 m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
1277 if (props[TIPC_NLA_PROP_WIN])
1278 m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
1279 if (props[TIPC_NLA_PROP_MTU]) {
1280 if (m->type_id != TIPC_MEDIA_TYPE_UDP) {
1281 NL_SET_ERR_MSG(info->extack,
1282 "MTU property is unsupported");
1285 #ifdef CONFIG_TIPC_MEDIA_UDP
1286 if (tipc_udp_mtu_bad(nla_get_u32
1287 (props[TIPC_NLA_PROP_MTU]))) {
1288 NL_SET_ERR_MSG(info->extack,
1289 "MTU value is out-of-range");
1292 m->mtu = nla_get_u32(props[TIPC_NLA_PROP_MTU]);
1300 int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
1305 err = __tipc_nl_media_set(skb, info);