2 * net/tipc/bearer.c: TIPC bearer code
4 * Copyright (c) 1996-2006, 2013-2014, 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 #define MAX_ADDR_STR 60
47 static struct tipc_media * const media_info_array[] = {
49 #ifdef CONFIG_TIPC_MEDIA_IB
52 #ifdef CONFIG_TIPC_MEDIA_UDP
58 static void bearer_disable(struct net *net, struct tipc_bearer *b);
61 * tipc_media_find - locates specified media object by name
63 struct tipc_media *tipc_media_find(const char *name)
67 for (i = 0; media_info_array[i] != NULL; i++) {
68 if (!strcmp(media_info_array[i]->name, name))
71 return media_info_array[i];
75 * media_find_id - locates specified media object by type identifier
77 static struct tipc_media *media_find_id(u8 type)
81 for (i = 0; media_info_array[i] != NULL; i++) {
82 if (media_info_array[i]->type_id == type)
85 return media_info_array[i];
89 * tipc_media_addr_printf - record media address in print buffer
91 void tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a)
93 char addr_str[MAX_ADDR_STR];
97 m = media_find_id(a->media_id);
99 if (m && !m->addr2str(a, addr_str, sizeof(addr_str)))
100 ret = scnprintf(buf, len, "%s(%s)", m->name, addr_str);
104 ret = scnprintf(buf, len, "UNKNOWN(%u)", a->media_id);
105 for (i = 0; i < sizeof(a->value); i++)
106 ret += scnprintf(buf - ret, len + ret,
107 "-%02x", a->value[i]);
112 * bearer_name_validate - validate & (optionally) deconstruct bearer name
113 * @name: ptr to bearer name string
114 * @name_parts: ptr to area for bearer name components (or NULL if not needed)
116 * Returns 1 if bearer name is valid, otherwise 0.
118 static int bearer_name_validate(const char *name,
119 struct tipc_bearer_names *name_parts)
121 char name_copy[TIPC_MAX_BEARER_NAME];
127 /* copy bearer name & ensure length is OK */
128 name_copy[TIPC_MAX_BEARER_NAME - 1] = 0;
129 /* need above in case non-Posix strncpy() doesn't pad with nulls */
130 strncpy(name_copy, name, TIPC_MAX_BEARER_NAME);
131 if (name_copy[TIPC_MAX_BEARER_NAME - 1] != 0)
134 /* ensure all component parts of bearer name are present */
135 media_name = name_copy;
136 if_name = strchr(media_name, ':');
140 media_len = if_name - media_name;
141 if_len = strlen(if_name) + 1;
143 /* validate component parts of bearer name */
144 if ((media_len <= 1) || (media_len > TIPC_MAX_MEDIA_NAME) ||
145 (if_len <= 1) || (if_len > TIPC_MAX_IF_NAME))
148 /* return bearer name components, if necessary */
150 strcpy(name_parts->media_name, media_name);
151 strcpy(name_parts->if_name, if_name);
157 * tipc_bearer_find - locates bearer object with matching bearer name
159 struct tipc_bearer *tipc_bearer_find(struct net *net, const char *name)
161 struct tipc_net *tn = net_generic(net, tipc_net_id);
162 struct tipc_bearer *b;
165 for (i = 0; i < MAX_BEARERS; i++) {
166 b = rtnl_dereference(tn->bearer_list[i]);
167 if (b && (!strcmp(b->name, name)))
173 void tipc_bearer_add_dest(struct net *net, u32 bearer_id, u32 dest)
175 struct tipc_net *tn = net_generic(net, tipc_net_id);
176 struct tipc_bearer *b;
179 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
181 tipc_disc_add_dest(b->link_req);
185 void tipc_bearer_remove_dest(struct net *net, u32 bearer_id, u32 dest)
187 struct tipc_net *tn = net_generic(net, tipc_net_id);
188 struct tipc_bearer *b;
191 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
193 tipc_disc_remove_dest(b->link_req);
198 * tipc_enable_bearer - enable bearer with the given name
200 static int tipc_enable_bearer(struct net *net, const char *name,
201 u32 disc_domain, u32 priority,
202 struct nlattr *attr[])
204 struct tipc_net *tn = net_generic(net, tipc_net_id);
205 struct tipc_bearer *b;
206 struct tipc_media *m;
207 struct tipc_bearer_names b_names;
209 char addr_string[16];
216 pr_warn("Bearer <%s> rejected, not supported in standalone mode\n",
220 if (!bearer_name_validate(name, &b_names)) {
221 pr_warn("Bearer <%s> rejected, illegal name\n", name);
224 if (tipc_addr_domain_valid(disc_domain) &&
225 (disc_domain != tn->own_addr)) {
226 if (tipc_in_scope(disc_domain, tn->own_addr)) {
227 disc_domain = tn->own_addr & TIPC_CLUSTER_MASK;
228 res = 0; /* accept any node in own cluster */
229 } else if (in_own_cluster_exact(net, disc_domain))
230 res = 0; /* accept specified node in own cluster */
233 pr_warn("Bearer <%s> rejected, illegal discovery domain\n",
237 if ((priority > TIPC_MAX_LINK_PRI) &&
238 (priority != TIPC_MEDIA_LINK_PRI)) {
239 pr_warn("Bearer <%s> rejected, illegal priority\n", name);
243 m = tipc_media_find(b_names.media_name);
245 pr_warn("Bearer <%s> rejected, media <%s> not registered\n",
246 name, b_names.media_name);
250 if (priority == TIPC_MEDIA_LINK_PRI)
251 priority = m->priority;
254 bearer_id = MAX_BEARERS;
256 for (i = MAX_BEARERS; i-- != 0; ) {
257 b = rtnl_dereference(tn->bearer_list[i]);
262 if (!strcmp(name, b->name)) {
263 pr_warn("Bearer <%s> rejected, already enabled\n",
267 if ((b->priority == priority) &&
268 (++with_this_prio > 2)) {
269 if (priority-- == 0) {
270 pr_warn("Bearer <%s> rejected, duplicate priority\n",
274 pr_warn("Bearer <%s> priority adjustment required %u->%u\n",
275 name, priority + 1, priority);
279 if (bearer_id >= MAX_BEARERS) {
280 pr_warn("Bearer <%s> rejected, bearer limit reached (%u)\n",
285 b = kzalloc(sizeof(*b), GFP_ATOMIC);
289 strcpy(b->name, name);
291 res = m->enable_media(net, b, attr);
293 pr_warn("Bearer <%s> rejected, enable failure (%d)\n",
298 b->identity = bearer_id;
299 b->tolerance = m->tolerance;
300 b->window = m->window;
301 b->domain = disc_domain;
302 b->net_plane = bearer_id + 'A';
303 b->priority = priority;
305 res = tipc_disc_create(net, b, &b->bcast_addr, &skb);
307 bearer_disable(net, b);
308 pr_warn("Bearer <%s> rejected, discovery object creation failed\n",
313 rcu_assign_pointer(tn->bearer_list[bearer_id], b);
315 tipc_bearer_xmit_skb(net, bearer_id, skb, &b->bcast_addr);
316 pr_info("Enabled bearer <%s>, discovery domain %s, priority %u\n",
318 tipc_addr_string_fill(addr_string, disc_domain), priority);
323 * tipc_reset_bearer - Reset all links established over this bearer
325 static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b)
327 pr_info("Resetting bearer <%s>\n", b->name);
328 tipc_node_delete_links(net, b->identity);
329 tipc_disc_reset(net, b);
333 /* tipc_bearer_reset_all - reset all links on all bearers
335 void tipc_bearer_reset_all(struct net *net)
337 struct tipc_net *tn = tipc_net(net);
338 struct tipc_bearer *b;
341 for (i = 0; i < MAX_BEARERS; i++) {
342 b = rcu_dereference_rtnl(tn->bearer_list[i]);
344 tipc_reset_bearer(net, b);
351 * Note: This routine assumes caller holds RTNL lock.
353 static void bearer_disable(struct net *net, struct tipc_bearer *b)
355 struct tipc_net *tn = tipc_net(net);
356 int bearer_id = b->identity;
358 pr_info("Disabling bearer <%s>\n", b->name);
359 b->media->disable_media(b);
360 tipc_node_delete_links(net, bearer_id);
361 RCU_INIT_POINTER(b->media_ptr, NULL);
363 tipc_disc_delete(b->link_req);
364 RCU_INIT_POINTER(tn->bearer_list[bearer_id], NULL);
368 int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b,
369 struct nlattr *attr[])
371 struct net_device *dev;
372 char *driver_name = strchr((const char *)b->name, ':') + 1;
374 /* Find device with specified name */
375 dev = dev_get_by_name(net, driver_name);
379 /* Associate TIPC bearer with L2 bearer */
380 rcu_assign_pointer(b->media_ptr, dev);
381 memset(&b->bcast_addr, 0, sizeof(b->bcast_addr));
382 memcpy(b->bcast_addr.value, dev->broadcast, b->media->hwaddr_len);
383 b->bcast_addr.media_id = b->media->type_id;
384 b->bcast_addr.broadcast = 1;
386 b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr);
387 rcu_assign_pointer(dev->tipc_ptr, b);
391 /* tipc_disable_l2_media - detach TIPC bearer from an L2 interface
393 * Mark L2 bearer as inactive so that incoming buffers are thrown away
395 void tipc_disable_l2_media(struct tipc_bearer *b)
397 struct net_device *dev;
399 dev = (struct net_device *)rtnl_dereference(b->media_ptr);
400 RCU_INIT_POINTER(dev->tipc_ptr, NULL);
406 * tipc_l2_send_msg - send a TIPC packet out over an L2 interface
407 * @skb: the packet to be sent
408 * @b: the bearer through which the packet is to be sent
409 * @dest: peer destination address
411 int tipc_l2_send_msg(struct net *net, struct sk_buff *skb,
412 struct tipc_bearer *b, struct tipc_media_addr *dest)
414 struct net_device *dev;
418 dev = (struct net_device *)rcu_dereference_rtnl(b->media_ptr);
422 /* Send RESET message even if bearer is detached from device */
423 tipc_ptr = rcu_dereference_rtnl(dev->tipc_ptr);
424 if (unlikely(!tipc_ptr && !msg_is_reset(buf_msg(skb))))
427 delta = dev->hard_header_len - skb_headroom(skb);
429 pskb_expand_head(skb, SKB_DATA_ALIGN(delta), 0, GFP_ATOMIC))
432 skb_reset_network_header(skb);
434 skb->protocol = htons(ETH_P_TIPC);
435 dev_hard_header(skb, dev, ETH_P_TIPC, dest->value,
436 dev->dev_addr, skb->len);
444 int tipc_bearer_mtu(struct net *net, u32 bearer_id)
447 struct tipc_bearer *b;
450 b = rcu_dereference_rtnl(tipc_net(net)->bearer_list[bearer_id]);
457 /* tipc_bearer_xmit_skb - sends buffer to destination over bearer
459 void tipc_bearer_xmit_skb(struct net *net, u32 bearer_id,
461 struct tipc_media_addr *dest)
463 struct tipc_net *tn = tipc_net(net);
464 struct tipc_bearer *b;
467 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
469 b->media->send_msg(net, skb, b, dest);
475 /* tipc_bearer_xmit() -send buffer to destination over bearer
477 void tipc_bearer_xmit(struct net *net, u32 bearer_id,
478 struct sk_buff_head *xmitq,
479 struct tipc_media_addr *dst)
481 struct tipc_net *tn = net_generic(net, tipc_net_id);
482 struct tipc_bearer *b;
483 struct sk_buff *skb, *tmp;
485 if (skb_queue_empty(xmitq))
489 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
491 __skb_queue_purge(xmitq);
492 skb_queue_walk_safe(xmitq, skb, tmp) {
493 __skb_dequeue(xmitq);
494 b->media->send_msg(net, skb, b, dst);
499 /* tipc_bearer_bc_xmit() - broadcast buffers to all destinations
501 void tipc_bearer_bc_xmit(struct net *net, u32 bearer_id,
502 struct sk_buff_head *xmitq)
504 struct tipc_net *tn = tipc_net(net);
505 int net_id = tn->net_id;
506 struct tipc_bearer *b;
507 struct sk_buff *skb, *tmp;
508 struct tipc_msg *hdr;
511 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
513 __skb_queue_purge(xmitq);
514 skb_queue_walk_safe(xmitq, skb, tmp) {
516 msg_set_non_seq(hdr, 1);
517 msg_set_mc_netid(hdr, net_id);
518 __skb_dequeue(xmitq);
519 b->media->send_msg(net, skb, b, &b->bcast_addr);
525 * tipc_l2_rcv_msg - handle incoming TIPC message from an interface
526 * @buf: the received packet
527 * @dev: the net device that the packet was received on
528 * @pt: the packet_type structure which was used to register this handler
529 * @orig_dev: the original receive net device in case the device is a bond
531 * Accept only packets explicitly sent to this node, or broadcast packets;
532 * ignores packets sent using interface multicast, and traffic sent to other
533 * nodes (which can happen if interface is running in promiscuous mode).
535 static int tipc_l2_rcv_msg(struct sk_buff *skb, struct net_device *dev,
536 struct packet_type *pt, struct net_device *orig_dev)
538 struct tipc_bearer *b;
541 b = rcu_dereference_rtnl(dev->tipc_ptr);
542 if (likely(b && (skb->pkt_type <= PACKET_BROADCAST))) {
544 tipc_rcv(dev_net(dev), skb, b);
546 return NET_RX_SUCCESS;
554 * tipc_l2_device_event - handle device events from network device
555 * @nb: the context of the notification
556 * @evt: the type of event
557 * @ptr: the net device that the event was on
559 * This function is called by the Ethernet driver in case of link
562 static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt,
565 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
566 struct net *net = dev_net(dev);
567 struct tipc_net *tn = tipc_net(net);
568 struct tipc_bearer *b;
571 b = rtnl_dereference(dev->tipc_ptr);
573 for (i = 0; i < MAX_BEARERS; b = NULL, i++) {
574 b = rtnl_dereference(tn->bearer_list[i]);
575 if (b && (b->media_ptr == dev))
586 if (netif_carrier_ok(dev))
589 rcu_assign_pointer(dev->tipc_ptr, b);
591 case NETDEV_GOING_DOWN:
592 RCU_INIT_POINTER(dev->tipc_ptr, NULL);
594 tipc_reset_bearer(net, b);
596 case NETDEV_CHANGEMTU:
597 tipc_reset_bearer(net, b);
599 case NETDEV_CHANGEADDR:
600 b->media->raw2addr(b, &b->addr,
601 (char *)dev->dev_addr);
602 tipc_reset_bearer(net, b);
604 case NETDEV_UNREGISTER:
605 case NETDEV_CHANGENAME:
606 bearer_disable(dev_net(dev), b);
612 static struct packet_type tipc_packet_type __read_mostly = {
613 .type = htons(ETH_P_TIPC),
614 .func = tipc_l2_rcv_msg,
617 static struct notifier_block notifier = {
618 .notifier_call = tipc_l2_device_event,
622 int tipc_bearer_setup(void)
626 err = register_netdevice_notifier(¬ifier);
629 dev_add_pack(&tipc_packet_type);
633 void tipc_bearer_cleanup(void)
635 unregister_netdevice_notifier(¬ifier);
636 dev_remove_pack(&tipc_packet_type);
639 void tipc_bearer_stop(struct net *net)
641 struct tipc_net *tn = net_generic(net, tipc_net_id);
642 struct tipc_bearer *b;
645 for (i = 0; i < MAX_BEARERS; i++) {
646 b = rtnl_dereference(tn->bearer_list[i]);
648 bearer_disable(net, b);
649 tn->bearer_list[i] = NULL;
654 /* Caller should hold rtnl_lock to protect the bearer */
655 static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg,
656 struct tipc_bearer *bearer, int nlflags)
659 struct nlattr *attrs;
662 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
663 nlflags, TIPC_NL_BEARER_GET);
667 attrs = nla_nest_start(msg->skb, TIPC_NLA_BEARER);
671 if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name))
674 prop = nla_nest_start(msg->skb, TIPC_NLA_BEARER_PROP);
677 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority))
679 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance))
681 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window))
684 nla_nest_end(msg->skb, prop);
685 nla_nest_end(msg->skb, attrs);
686 genlmsg_end(msg->skb, hdr);
691 nla_nest_cancel(msg->skb, prop);
693 nla_nest_cancel(msg->skb, attrs);
695 genlmsg_cancel(msg->skb, hdr);
700 int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb)
704 struct tipc_bearer *bearer;
705 struct tipc_nl_msg msg;
706 struct net *net = sock_net(skb->sk);
707 struct tipc_net *tn = net_generic(net, tipc_net_id);
709 if (i == MAX_BEARERS)
713 msg.portid = NETLINK_CB(cb->skb).portid;
714 msg.seq = cb->nlh->nlmsg_seq;
717 for (i = 0; i < MAX_BEARERS; i++) {
718 bearer = rtnl_dereference(tn->bearer_list[i]);
722 err = __tipc_nl_add_bearer(&msg, bearer, NLM_F_MULTI);
732 int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info)
737 struct tipc_bearer *bearer;
738 struct tipc_nl_msg msg;
739 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
740 struct net *net = genl_info_net(info);
742 if (!info->attrs[TIPC_NLA_BEARER])
745 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
746 info->attrs[TIPC_NLA_BEARER],
747 tipc_nl_bearer_policy);
751 if (!attrs[TIPC_NLA_BEARER_NAME])
753 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
755 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
760 msg.portid = info->snd_portid;
761 msg.seq = info->snd_seq;
764 bearer = tipc_bearer_find(net, name);
770 err = __tipc_nl_add_bearer(&msg, bearer, 0);
775 return genlmsg_reply(rep, info);
783 int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info)
787 struct tipc_bearer *bearer;
788 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
789 struct net *net = sock_net(skb->sk);
791 if (!info->attrs[TIPC_NLA_BEARER])
794 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
795 info->attrs[TIPC_NLA_BEARER],
796 tipc_nl_bearer_policy);
800 if (!attrs[TIPC_NLA_BEARER_NAME])
803 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
806 bearer = tipc_bearer_find(net, name);
812 bearer_disable(net, bearer);
818 int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
822 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
823 struct net *net = sock_net(skb->sk);
824 struct tipc_net *tn = net_generic(net, tipc_net_id);
828 prio = TIPC_MEDIA_LINK_PRI;
829 domain = tn->own_addr & TIPC_CLUSTER_MASK;
831 if (!info->attrs[TIPC_NLA_BEARER])
834 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
835 info->attrs[TIPC_NLA_BEARER],
836 tipc_nl_bearer_policy);
840 if (!attrs[TIPC_NLA_BEARER_NAME])
843 bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
845 if (attrs[TIPC_NLA_BEARER_DOMAIN])
846 domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]);
848 if (attrs[TIPC_NLA_BEARER_PROP]) {
849 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
851 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
856 if (props[TIPC_NLA_PROP_PRIO])
857 prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
861 err = tipc_enable_bearer(net, bearer, domain, prio, attrs);
871 int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
875 struct tipc_bearer *b;
876 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
877 struct net *net = sock_net(skb->sk);
879 if (!info->attrs[TIPC_NLA_BEARER])
882 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
883 info->attrs[TIPC_NLA_BEARER],
884 tipc_nl_bearer_policy);
888 if (!attrs[TIPC_NLA_BEARER_NAME])
890 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
893 b = tipc_bearer_find(net, name);
899 if (attrs[TIPC_NLA_BEARER_PROP]) {
900 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
902 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
909 if (props[TIPC_NLA_PROP_TOL])
910 b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
911 if (props[TIPC_NLA_PROP_PRIO])
912 b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
913 if (props[TIPC_NLA_PROP_WIN])
914 b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
921 static int __tipc_nl_add_media(struct tipc_nl_msg *msg,
922 struct tipc_media *media, int nlflags)
925 struct nlattr *attrs;
928 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
929 nlflags, TIPC_NL_MEDIA_GET);
933 attrs = nla_nest_start(msg->skb, TIPC_NLA_MEDIA);
937 if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name))
940 prop = nla_nest_start(msg->skb, TIPC_NLA_MEDIA_PROP);
943 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority))
945 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance))
947 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window))
950 nla_nest_end(msg->skb, prop);
951 nla_nest_end(msg->skb, attrs);
952 genlmsg_end(msg->skb, hdr);
957 nla_nest_cancel(msg->skb, prop);
959 nla_nest_cancel(msg->skb, attrs);
961 genlmsg_cancel(msg->skb, hdr);
966 int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb)
970 struct tipc_nl_msg msg;
976 msg.portid = NETLINK_CB(cb->skb).portid;
977 msg.seq = cb->nlh->nlmsg_seq;
980 for (; media_info_array[i] != NULL; i++) {
981 err = __tipc_nl_add_media(&msg, media_info_array[i],
992 int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info)
996 struct tipc_nl_msg msg;
997 struct tipc_media *media;
999 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1001 if (!info->attrs[TIPC_NLA_MEDIA])
1004 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
1005 info->attrs[TIPC_NLA_MEDIA],
1006 tipc_nl_media_policy);
1010 if (!attrs[TIPC_NLA_MEDIA_NAME])
1012 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1014 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1019 msg.portid = info->snd_portid;
1020 msg.seq = info->snd_seq;
1023 media = tipc_media_find(name);
1029 err = __tipc_nl_add_media(&msg, media, 0);
1034 return genlmsg_reply(rep, info);
1042 int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
1046 struct tipc_media *m;
1047 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1049 if (!info->attrs[TIPC_NLA_MEDIA])
1052 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
1053 info->attrs[TIPC_NLA_MEDIA],
1054 tipc_nl_media_policy);
1056 if (!attrs[TIPC_NLA_MEDIA_NAME])
1058 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1061 m = tipc_media_find(name);
1067 if (attrs[TIPC_NLA_MEDIA_PROP]) {
1068 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
1070 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP],
1077 if (props[TIPC_NLA_PROP_TOL])
1078 m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
1079 if (props[TIPC_NLA_PROP_PRIO])
1080 m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
1081 if (props[TIPC_NLA_PROP_WIN])
1082 m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);