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
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.
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);
68 static int tipc_l2_rcv_msg(struct sk_buff *skb, struct net_device *dev,
69 struct packet_type *pt, struct net_device *orig_dev);
72 * tipc_media_find - locates specified media object by name
74 struct tipc_media *tipc_media_find(const char *name)
78 for (i = 0; media_info_array[i] != NULL; i++) {
79 if (!strcmp(media_info_array[i]->name, name))
82 return media_info_array[i];
86 * media_find_id - locates specified media object by type identifier
88 static struct tipc_media *media_find_id(u8 type)
92 for (i = 0; media_info_array[i] != NULL; i++) {
93 if (media_info_array[i]->type_id == type)
96 return media_info_array[i];
100 * tipc_media_addr_printf - record media address in print buffer
102 void tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a)
104 char addr_str[MAX_ADDR_STR];
105 struct tipc_media *m;
108 m = media_find_id(a->media_id);
110 if (m && !m->addr2str(a, addr_str, sizeof(addr_str)))
111 ret = scnprintf(buf, len, "%s(%s)", m->name, addr_str);
115 ret = scnprintf(buf, len, "UNKNOWN(%u)", a->media_id);
116 for (i = 0; i < sizeof(a->value); i++)
117 ret += scnprintf(buf - ret, len + ret,
118 "-%02x", a->value[i]);
123 * bearer_name_validate - validate & (optionally) deconstruct bearer name
124 * @name: ptr to bearer name string
125 * @name_parts: ptr to area for bearer name components (or NULL if not needed)
127 * Returns 1 if bearer name is valid, otherwise 0.
129 static int bearer_name_validate(const char *name,
130 struct tipc_bearer_names *name_parts)
132 char name_copy[TIPC_MAX_BEARER_NAME];
138 /* copy bearer name & ensure length is OK */
139 name_copy[TIPC_MAX_BEARER_NAME - 1] = 0;
140 /* need above in case non-Posix strncpy() doesn't pad with nulls */
141 strncpy(name_copy, name, TIPC_MAX_BEARER_NAME);
142 if (name_copy[TIPC_MAX_BEARER_NAME - 1] != 0)
145 /* ensure all component parts of bearer name are present */
146 media_name = name_copy;
147 if_name = strchr(media_name, ':');
151 media_len = if_name - media_name;
152 if_len = strlen(if_name) + 1;
154 /* validate component parts of bearer name */
155 if ((media_len <= 1) || (media_len > TIPC_MAX_MEDIA_NAME) ||
156 (if_len <= 1) || (if_len > TIPC_MAX_IF_NAME))
159 /* return bearer name components, if necessary */
161 strcpy(name_parts->media_name, media_name);
162 strcpy(name_parts->if_name, if_name);
168 * tipc_bearer_find - locates bearer object with matching bearer name
170 struct tipc_bearer *tipc_bearer_find(struct net *net, const char *name)
172 struct tipc_net *tn = net_generic(net, tipc_net_id);
173 struct tipc_bearer *b;
176 for (i = 0; i < MAX_BEARERS; i++) {
177 b = rtnl_dereference(tn->bearer_list[i]);
178 if (b && (!strcmp(b->name, name)))
184 /* tipc_bearer_get_name - get the bearer name from its id.
185 * @net: network namespace
186 * @name: a pointer to the buffer where the name will be stored.
187 * @bearer_id: the id to get the name from.
189 int tipc_bearer_get_name(struct net *net, char *name, u32 bearer_id)
191 struct tipc_net *tn = tipc_net(net);
192 struct tipc_bearer *b;
194 if (bearer_id >= MAX_BEARERS)
197 b = rtnl_dereference(tn->bearer_list[bearer_id]);
201 strcpy(name, b->name);
205 void tipc_bearer_add_dest(struct net *net, u32 bearer_id, u32 dest)
207 struct tipc_net *tn = net_generic(net, tipc_net_id);
208 struct tipc_bearer *b;
211 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
213 tipc_disc_add_dest(b->link_req);
217 void tipc_bearer_remove_dest(struct net *net, u32 bearer_id, u32 dest)
219 struct tipc_net *tn = net_generic(net, tipc_net_id);
220 struct tipc_bearer *b;
223 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
225 tipc_disc_remove_dest(b->link_req);
230 * tipc_enable_bearer - enable bearer with the given name
232 static int tipc_enable_bearer(struct net *net, const char *name,
233 u32 disc_domain, u32 priority,
234 struct nlattr *attr[])
236 struct tipc_net *tn = net_generic(net, tipc_net_id);
237 struct tipc_bearer *b;
238 struct tipc_media *m;
239 struct tipc_bearer_names b_names;
241 char addr_string[16];
248 pr_warn("Bearer <%s> rejected, not supported in standalone mode\n",
252 if (!bearer_name_validate(name, &b_names)) {
253 pr_warn("Bearer <%s> rejected, illegal name\n", name);
256 if (tipc_addr_domain_valid(disc_domain) &&
257 (disc_domain != tn->own_addr)) {
258 if (tipc_in_scope(disc_domain, tn->own_addr)) {
259 disc_domain = tn->own_addr & TIPC_ZONE_CLUSTER_MASK;
260 res = 0; /* accept any node in own cluster */
261 } else if (in_own_cluster_exact(net, disc_domain))
262 res = 0; /* accept specified node in own cluster */
265 pr_warn("Bearer <%s> rejected, illegal discovery domain\n",
269 if ((priority > TIPC_MAX_LINK_PRI) &&
270 (priority != TIPC_MEDIA_LINK_PRI)) {
271 pr_warn("Bearer <%s> rejected, illegal priority\n", name);
275 m = tipc_media_find(b_names.media_name);
277 pr_warn("Bearer <%s> rejected, media <%s> not registered\n",
278 name, b_names.media_name);
282 if (priority == TIPC_MEDIA_LINK_PRI)
283 priority = m->priority;
286 bearer_id = MAX_BEARERS;
288 for (i = MAX_BEARERS; i-- != 0; ) {
289 b = rtnl_dereference(tn->bearer_list[i]);
294 if (!strcmp(name, b->name)) {
295 pr_warn("Bearer <%s> rejected, already enabled\n",
299 if ((b->priority == priority) &&
300 (++with_this_prio > 2)) {
301 if (priority-- == 0) {
302 pr_warn("Bearer <%s> rejected, duplicate priority\n",
306 pr_warn("Bearer <%s> priority adjustment required %u->%u\n",
307 name, priority + 1, priority);
311 if (bearer_id >= MAX_BEARERS) {
312 pr_warn("Bearer <%s> rejected, bearer limit reached (%u)\n",
317 b = kzalloc(sizeof(*b), GFP_ATOMIC);
321 strcpy(b->name, name);
323 res = m->enable_media(net, b, attr);
325 pr_warn("Bearer <%s> rejected, enable failure (%d)\n",
330 b->identity = bearer_id;
331 b->tolerance = m->tolerance;
332 b->window = m->window;
333 b->domain = disc_domain;
334 b->net_plane = bearer_id + 'A';
335 b->priority = priority;
336 test_and_set_bit_lock(0, &b->up);
338 res = tipc_disc_create(net, b, &b->bcast_addr, &skb);
340 bearer_disable(net, b);
341 pr_warn("Bearer <%s> rejected, discovery object creation failed\n",
346 rcu_assign_pointer(tn->bearer_list[bearer_id], b);
348 tipc_bearer_xmit_skb(net, bearer_id, skb, &b->bcast_addr);
350 if (tipc_mon_create(net, bearer_id))
353 pr_info("Enabled bearer <%s>, discovery domain %s, priority %u\n",
355 tipc_addr_string_fill(addr_string, disc_domain), priority);
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);
370 /* tipc_bearer_reset_all - reset all links on all bearers
372 void tipc_bearer_reset_all(struct net *net)
374 struct tipc_bearer *b;
377 for (i = 0; i < MAX_BEARERS; i++) {
378 b = bearer_get(net, i);
380 clear_bit_unlock(0, &b->up);
382 for (i = 0; i < MAX_BEARERS; i++) {
383 b = bearer_get(net, i);
385 tipc_reset_bearer(net, b);
387 for (i = 0; i < MAX_BEARERS; i++) {
388 b = bearer_get(net, i);
390 test_and_set_bit_lock(0, &b->up);
397 * Note: This routine assumes caller holds RTNL lock.
399 static void bearer_disable(struct net *net, struct tipc_bearer *b)
401 struct tipc_net *tn = tipc_net(net);
402 int bearer_id = b->identity;
404 pr_info("Disabling bearer <%s>\n", b->name);
405 clear_bit_unlock(0, &b->up);
406 tipc_node_delete_links(net, bearer_id);
407 b->media->disable_media(b);
408 RCU_INIT_POINTER(b->media_ptr, NULL);
410 tipc_disc_delete(b->link_req);
411 RCU_INIT_POINTER(tn->bearer_list[bearer_id], NULL);
413 tipc_mon_delete(net, bearer_id);
416 int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b,
417 struct nlattr *attr[])
419 struct net_device *dev;
420 char *driver_name = strchr((const char *)b->name, ':') + 1;
422 /* Find device with specified name */
423 dev = dev_get_by_name(net, driver_name);
426 if (tipc_mtu_bad(dev, 0)) {
431 /* Associate TIPC bearer with L2 bearer */
432 rcu_assign_pointer(b->media_ptr, dev);
434 b->pt.type = htons(ETH_P_TIPC);
435 b->pt.func = tipc_l2_rcv_msg;
436 dev_add_pack(&b->pt);
437 memset(&b->bcast_addr, 0, sizeof(b->bcast_addr));
438 memcpy(b->bcast_addr.value, dev->broadcast, b->media->hwaddr_len);
439 b->bcast_addr.media_id = b->media->type_id;
440 b->bcast_addr.broadcast = TIPC_BROADCAST_SUPPORT;
442 b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr);
443 rcu_assign_pointer(dev->tipc_ptr, b);
447 /* tipc_disable_l2_media - detach TIPC bearer from an L2 interface
449 * Mark L2 bearer as inactive so that incoming buffers are thrown away
451 void tipc_disable_l2_media(struct tipc_bearer *b)
453 struct net_device *dev;
455 dev = (struct net_device *)rtnl_dereference(b->media_ptr);
456 dev_remove_pack(&b->pt);
457 RCU_INIT_POINTER(dev->tipc_ptr, NULL);
463 * tipc_l2_send_msg - send a TIPC packet out over an L2 interface
464 * @skb: the packet to be sent
465 * @b: the bearer through which the packet is to be sent
466 * @dest: peer destination address
468 int tipc_l2_send_msg(struct net *net, struct sk_buff *skb,
469 struct tipc_bearer *b, struct tipc_media_addr *dest)
471 struct net_device *dev;
474 dev = (struct net_device *)rcu_dereference_rtnl(b->media_ptr);
478 delta = SKB_DATA_ALIGN(dev->hard_header_len - skb_headroom(skb));
479 if ((delta > 0) && pskb_expand_head(skb, delta, 0, GFP_ATOMIC)) {
483 skb_reset_network_header(skb);
485 skb->protocol = htons(ETH_P_TIPC);
486 dev_hard_header(skb, dev, ETH_P_TIPC, dest->value,
487 dev->dev_addr, skb->len);
492 bool tipc_bearer_bcast_support(struct net *net, u32 bearer_id)
495 struct tipc_bearer *b;
498 b = bearer_get(net, bearer_id);
500 supp = (b->bcast_addr.broadcast == TIPC_BROADCAST_SUPPORT);
505 int tipc_bearer_mtu(struct net *net, u32 bearer_id)
508 struct tipc_bearer *b;
511 b = rcu_dereference_rtnl(tipc_net(net)->bearer_list[bearer_id]);
518 /* tipc_bearer_xmit_skb - sends buffer to destination over bearer
520 void tipc_bearer_xmit_skb(struct net *net, u32 bearer_id,
522 struct tipc_media_addr *dest)
524 struct tipc_msg *hdr = buf_msg(skb);
525 struct tipc_bearer *b;
528 b = bearer_get(net, bearer_id);
529 if (likely(b && (test_bit(0, &b->up) || msg_is_reset(hdr))))
530 b->media->send_msg(net, skb, b, dest);
536 /* tipc_bearer_xmit() -send buffer to destination over bearer
538 void tipc_bearer_xmit(struct net *net, u32 bearer_id,
539 struct sk_buff_head *xmitq,
540 struct tipc_media_addr *dst)
542 struct tipc_bearer *b;
543 struct sk_buff *skb, *tmp;
545 if (skb_queue_empty(xmitq))
549 b = bearer_get(net, bearer_id);
551 __skb_queue_purge(xmitq);
552 skb_queue_walk_safe(xmitq, skb, tmp) {
553 __skb_dequeue(xmitq);
554 if (likely(test_bit(0, &b->up) || msg_is_reset(buf_msg(skb))))
555 b->media->send_msg(net, skb, b, dst);
562 /* tipc_bearer_bc_xmit() - broadcast buffers to all destinations
564 void tipc_bearer_bc_xmit(struct net *net, u32 bearer_id,
565 struct sk_buff_head *xmitq)
567 struct tipc_net *tn = tipc_net(net);
568 int net_id = tn->net_id;
569 struct tipc_bearer *b;
570 struct sk_buff *skb, *tmp;
571 struct tipc_msg *hdr;
574 b = bearer_get(net, bearer_id);
575 if (unlikely(!b || !test_bit(0, &b->up)))
576 __skb_queue_purge(xmitq);
577 skb_queue_walk_safe(xmitq, skb, tmp) {
579 msg_set_non_seq(hdr, 1);
580 msg_set_mc_netid(hdr, net_id);
581 __skb_dequeue(xmitq);
582 b->media->send_msg(net, skb, b, &b->bcast_addr);
588 * tipc_l2_rcv_msg - handle incoming TIPC message from an interface
589 * @buf: the received packet
590 * @dev: the net device that the packet was received on
591 * @pt: the packet_type structure which was used to register this handler
592 * @orig_dev: the original receive net device in case the device is a bond
594 * Accept only packets explicitly sent to this node, or broadcast packets;
595 * ignores packets sent using interface multicast, and traffic sent to other
596 * nodes (which can happen if interface is running in promiscuous mode).
598 static int tipc_l2_rcv_msg(struct sk_buff *skb, struct net_device *dev,
599 struct packet_type *pt, struct net_device *orig_dev)
601 struct tipc_bearer *b;
604 b = rcu_dereference_rtnl(dev->tipc_ptr) ?:
605 rcu_dereference_rtnl(orig_dev->tipc_ptr);
606 if (likely(b && test_bit(0, &b->up) &&
607 (skb->pkt_type <= PACKET_MULTICAST))) {
609 tipc_rcv(dev_net(b->pt.dev), skb, b);
611 return NET_RX_SUCCESS;
619 * tipc_l2_device_event - handle device events from network device
620 * @nb: the context of the notification
621 * @evt: the type of event
622 * @ptr: the net device that the event was on
624 * This function is called by the Ethernet driver in case of link
627 static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt,
630 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
631 struct net *net = dev_net(dev);
632 struct tipc_bearer *b;
634 b = rtnl_dereference(dev->tipc_ptr);
640 if (netif_carrier_ok(dev))
643 test_and_set_bit_lock(0, &b->up);
645 case NETDEV_GOING_DOWN:
646 clear_bit_unlock(0, &b->up);
647 tipc_reset_bearer(net, b);
649 case NETDEV_CHANGEMTU:
650 if (tipc_mtu_bad(dev, 0)) {
651 bearer_disable(net, b);
655 tipc_reset_bearer(net, b);
657 case NETDEV_CHANGEADDR:
658 b->media->raw2addr(b, &b->addr,
659 (char *)dev->dev_addr);
660 tipc_reset_bearer(net, b);
662 case NETDEV_UNREGISTER:
663 case NETDEV_CHANGENAME:
664 bearer_disable(dev_net(dev), b);
670 static struct notifier_block notifier = {
671 .notifier_call = tipc_l2_device_event,
675 int tipc_bearer_setup(void)
677 return register_netdevice_notifier(¬ifier);
680 void tipc_bearer_cleanup(void)
682 unregister_netdevice_notifier(¬ifier);
685 void tipc_bearer_stop(struct net *net)
687 struct tipc_net *tn = net_generic(net, tipc_net_id);
688 struct tipc_bearer *b;
691 for (i = 0; i < MAX_BEARERS; i++) {
692 b = rtnl_dereference(tn->bearer_list[i]);
694 bearer_disable(net, b);
695 tn->bearer_list[i] = NULL;
700 /* Caller should hold rtnl_lock to protect the bearer */
701 static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg,
702 struct tipc_bearer *bearer, int nlflags)
705 struct nlattr *attrs;
708 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
709 nlflags, TIPC_NL_BEARER_GET);
713 attrs = nla_nest_start(msg->skb, TIPC_NLA_BEARER);
717 if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name))
720 prop = nla_nest_start(msg->skb, TIPC_NLA_BEARER_PROP);
723 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority))
725 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance))
727 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window))
730 nla_nest_end(msg->skb, prop);
732 #ifdef CONFIG_TIPC_MEDIA_UDP
733 if (bearer->media->type_id == TIPC_MEDIA_TYPE_UDP) {
734 if (tipc_udp_nl_add_bearer_data(msg, bearer))
739 nla_nest_end(msg->skb, attrs);
740 genlmsg_end(msg->skb, hdr);
745 nla_nest_cancel(msg->skb, prop);
747 nla_nest_cancel(msg->skb, attrs);
749 genlmsg_cancel(msg->skb, hdr);
754 int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb)
758 struct tipc_bearer *bearer;
759 struct tipc_nl_msg msg;
760 struct net *net = sock_net(skb->sk);
761 struct tipc_net *tn = net_generic(net, tipc_net_id);
763 if (i == MAX_BEARERS)
767 msg.portid = NETLINK_CB(cb->skb).portid;
768 msg.seq = cb->nlh->nlmsg_seq;
771 for (i = 0; i < MAX_BEARERS; i++) {
772 bearer = rtnl_dereference(tn->bearer_list[i]);
776 err = __tipc_nl_add_bearer(&msg, bearer, NLM_F_MULTI);
786 int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info)
791 struct tipc_bearer *bearer;
792 struct tipc_nl_msg msg;
793 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
794 struct net *net = genl_info_net(info);
796 if (!info->attrs[TIPC_NLA_BEARER])
799 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
800 info->attrs[TIPC_NLA_BEARER],
801 tipc_nl_bearer_policy, info->extack);
805 if (!attrs[TIPC_NLA_BEARER_NAME])
807 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
809 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
814 msg.portid = info->snd_portid;
815 msg.seq = info->snd_seq;
818 bearer = tipc_bearer_find(net, name);
824 err = __tipc_nl_add_bearer(&msg, bearer, 0);
829 return genlmsg_reply(rep, info);
837 int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info)
841 struct tipc_bearer *bearer;
842 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
843 struct net *net = sock_net(skb->sk);
845 if (!info->attrs[TIPC_NLA_BEARER])
848 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
849 info->attrs[TIPC_NLA_BEARER],
850 tipc_nl_bearer_policy, info->extack);
854 if (!attrs[TIPC_NLA_BEARER_NAME])
857 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
860 bearer = tipc_bearer_find(net, name);
866 bearer_disable(net, bearer);
872 int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
876 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
877 struct net *net = sock_net(skb->sk);
878 struct tipc_net *tn = net_generic(net, tipc_net_id);
882 prio = TIPC_MEDIA_LINK_PRI;
883 domain = tn->own_addr & TIPC_ZONE_CLUSTER_MASK;
885 if (!info->attrs[TIPC_NLA_BEARER])
888 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
889 info->attrs[TIPC_NLA_BEARER],
890 tipc_nl_bearer_policy, info->extack);
894 if (!attrs[TIPC_NLA_BEARER_NAME])
897 bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
899 if (attrs[TIPC_NLA_BEARER_DOMAIN])
900 domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]);
902 if (attrs[TIPC_NLA_BEARER_PROP]) {
903 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
905 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
910 if (props[TIPC_NLA_PROP_PRIO])
911 prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
915 err = tipc_enable_bearer(net, bearer, domain, prio, attrs);
925 int tipc_nl_bearer_add(struct sk_buff *skb, struct genl_info *info)
929 struct tipc_bearer *b;
930 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
931 struct net *net = sock_net(skb->sk);
933 if (!info->attrs[TIPC_NLA_BEARER])
936 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
937 info->attrs[TIPC_NLA_BEARER],
938 tipc_nl_bearer_policy, info->extack);
942 if (!attrs[TIPC_NLA_BEARER_NAME])
944 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
947 b = tipc_bearer_find(net, name);
953 #ifdef CONFIG_TIPC_MEDIA_UDP
954 if (attrs[TIPC_NLA_BEARER_UDP_OPTS]) {
955 err = tipc_udp_nl_bearer_add(b,
956 attrs[TIPC_NLA_BEARER_UDP_OPTS]);
968 int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
972 struct tipc_bearer *b;
973 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
974 struct net *net = sock_net(skb->sk);
976 if (!info->attrs[TIPC_NLA_BEARER])
979 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
980 info->attrs[TIPC_NLA_BEARER],
981 tipc_nl_bearer_policy, info->extack);
985 if (!attrs[TIPC_NLA_BEARER_NAME])
987 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
990 b = tipc_bearer_find(net, name);
996 if (attrs[TIPC_NLA_BEARER_PROP]) {
997 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
999 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
1006 if (props[TIPC_NLA_PROP_TOL])
1007 b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
1008 if (props[TIPC_NLA_PROP_PRIO])
1009 b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
1010 if (props[TIPC_NLA_PROP_WIN])
1011 b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
1018 static int __tipc_nl_add_media(struct tipc_nl_msg *msg,
1019 struct tipc_media *media, int nlflags)
1022 struct nlattr *attrs;
1023 struct nlattr *prop;
1025 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
1026 nlflags, TIPC_NL_MEDIA_GET);
1030 attrs = nla_nest_start(msg->skb, TIPC_NLA_MEDIA);
1034 if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name))
1037 prop = nla_nest_start(msg->skb, TIPC_NLA_MEDIA_PROP);
1040 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority))
1042 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance))
1044 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window))
1047 nla_nest_end(msg->skb, prop);
1048 nla_nest_end(msg->skb, attrs);
1049 genlmsg_end(msg->skb, hdr);
1054 nla_nest_cancel(msg->skb, prop);
1056 nla_nest_cancel(msg->skb, attrs);
1058 genlmsg_cancel(msg->skb, hdr);
1063 int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb)
1066 int i = cb->args[0];
1067 struct tipc_nl_msg msg;
1073 msg.portid = NETLINK_CB(cb->skb).portid;
1074 msg.seq = cb->nlh->nlmsg_seq;
1077 for (; media_info_array[i] != NULL; i++) {
1078 err = __tipc_nl_add_media(&msg, media_info_array[i],
1089 int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info)
1093 struct tipc_nl_msg msg;
1094 struct tipc_media *media;
1095 struct sk_buff *rep;
1096 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1098 if (!info->attrs[TIPC_NLA_MEDIA])
1101 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
1102 info->attrs[TIPC_NLA_MEDIA],
1103 tipc_nl_media_policy, info->extack);
1107 if (!attrs[TIPC_NLA_MEDIA_NAME])
1109 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1111 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1116 msg.portid = info->snd_portid;
1117 msg.seq = info->snd_seq;
1120 media = tipc_media_find(name);
1126 err = __tipc_nl_add_media(&msg, media, 0);
1131 return genlmsg_reply(rep, info);
1139 int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
1143 struct tipc_media *m;
1144 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1146 if (!info->attrs[TIPC_NLA_MEDIA])
1149 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
1150 info->attrs[TIPC_NLA_MEDIA],
1151 tipc_nl_media_policy, info->extack);
1153 if (!attrs[TIPC_NLA_MEDIA_NAME])
1155 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1158 m = tipc_media_find(name);
1164 if (attrs[TIPC_NLA_MEDIA_PROP]) {
1165 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
1167 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP],
1174 if (props[TIPC_NLA_PROP_TOL])
1175 m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
1176 if (props[TIPC_NLA_PROP_PRIO])
1177 m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
1178 if (props[TIPC_NLA_PROP_WIN])
1179 m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);