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
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31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
34 * POSSIBILITY OF SUCH DAMAGE.
45 #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;
208 char addr_string[16];
215 pr_warn("Bearer <%s> rejected, not supported in standalone mode\n",
219 if (!bearer_name_validate(name, &b_names)) {
220 pr_warn("Bearer <%s> rejected, illegal name\n", name);
223 if (tipc_addr_domain_valid(disc_domain) &&
224 (disc_domain != tn->own_addr)) {
225 if (tipc_in_scope(disc_domain, tn->own_addr)) {
226 disc_domain = tn->own_addr & TIPC_CLUSTER_MASK;
227 res = 0; /* accept any node in own cluster */
228 } else if (in_own_cluster_exact(net, disc_domain))
229 res = 0; /* accept specified node in own cluster */
232 pr_warn("Bearer <%s> rejected, illegal discovery domain\n",
236 if ((priority > TIPC_MAX_LINK_PRI) &&
237 (priority != TIPC_MEDIA_LINK_PRI)) {
238 pr_warn("Bearer <%s> rejected, illegal priority\n", name);
242 m = tipc_media_find(b_names.media_name);
244 pr_warn("Bearer <%s> rejected, media <%s> not registered\n",
245 name, b_names.media_name);
249 if (priority == TIPC_MEDIA_LINK_PRI)
250 priority = m->priority;
253 bearer_id = MAX_BEARERS;
255 for (i = MAX_BEARERS; i-- != 0; ) {
256 b = rtnl_dereference(tn->bearer_list[i]);
261 if (!strcmp(name, b->name)) {
262 pr_warn("Bearer <%s> rejected, already enabled\n",
266 if ((b->priority == priority) &&
267 (++with_this_prio > 2)) {
268 if (priority-- == 0) {
269 pr_warn("Bearer <%s> rejected, duplicate priority\n",
273 pr_warn("Bearer <%s> priority adjustment required %u->%u\n",
274 name, priority + 1, priority);
278 if (bearer_id >= MAX_BEARERS) {
279 pr_warn("Bearer <%s> rejected, bearer limit reached (%u)\n",
284 b = kzalloc(sizeof(*b), GFP_ATOMIC);
288 strcpy(b->name, name);
290 res = m->enable_media(net, b, attr);
292 pr_warn("Bearer <%s> rejected, enable failure (%d)\n",
297 b->identity = bearer_id;
298 b->tolerance = m->tolerance;
299 b->window = m->window;
300 b->domain = disc_domain;
301 b->net_plane = bearer_id + 'A';
302 b->priority = priority;
304 res = tipc_disc_create(net, b, &b->bcast_addr);
306 bearer_disable(net, b);
307 pr_warn("Bearer <%s> rejected, discovery object creation failed\n",
312 rcu_assign_pointer(tn->bearer_list[bearer_id], b);
314 pr_info("Enabled bearer <%s>, discovery domain %s, priority %u\n",
316 tipc_addr_string_fill(addr_string, disc_domain), priority);
321 * tipc_reset_bearer - Reset all links established over this bearer
323 static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b)
325 pr_info("Resetting bearer <%s>\n", b->name);
326 tipc_node_delete_links(net, b->identity);
327 tipc_disc_reset(net, b);
334 * Note: This routine assumes caller holds RTNL lock.
336 static void bearer_disable(struct net *net, struct tipc_bearer *b)
338 struct tipc_net *tn = net_generic(net, tipc_net_id);
341 pr_info("Disabling bearer <%s>\n", b->name);
342 b->media->disable_media(b);
344 tipc_node_delete_links(net, b->identity);
345 RCU_INIT_POINTER(b->media_ptr, NULL);
347 tipc_disc_delete(b->link_req);
349 for (i = 0; i < MAX_BEARERS; i++) {
350 if (b == rtnl_dereference(tn->bearer_list[i])) {
351 RCU_INIT_POINTER(tn->bearer_list[i], NULL);
358 int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b,
359 struct nlattr *attr[])
361 struct net_device *dev;
362 char *driver_name = strchr((const char *)b->name, ':') + 1;
364 /* Find device with specified name */
365 dev = dev_get_by_name(net, driver_name);
369 /* Associate TIPC bearer with L2 bearer */
370 rcu_assign_pointer(b->media_ptr, dev);
371 memset(&b->bcast_addr, 0, sizeof(b->bcast_addr));
372 memcpy(b->bcast_addr.value, dev->broadcast, b->media->hwaddr_len);
373 b->bcast_addr.media_id = b->media->type_id;
374 b->bcast_addr.broadcast = 1;
376 b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr);
377 rcu_assign_pointer(dev->tipc_ptr, b);
381 /* tipc_disable_l2_media - detach TIPC bearer from an L2 interface
383 * Mark L2 bearer as inactive so that incoming buffers are thrown away
385 void tipc_disable_l2_media(struct tipc_bearer *b)
387 struct net_device *dev;
389 dev = (struct net_device *)rtnl_dereference(b->media_ptr);
390 RCU_INIT_POINTER(dev->tipc_ptr, NULL);
396 * tipc_l2_send_msg - send a TIPC packet out over an L2 interface
397 * @buf: the packet to be sent
398 * @b: the bearer through which the packet is to be sent
399 * @dest: peer destination address
401 int tipc_l2_send_msg(struct net *net, struct sk_buff *skb,
402 struct tipc_bearer *b, struct tipc_media_addr *dest)
404 struct net_device *dev;
407 dev = (struct net_device *)rcu_dereference_rtnl(b->media_ptr);
411 delta = dev->hard_header_len - skb_headroom(skb);
413 pskb_expand_head(skb, SKB_DATA_ALIGN(delta), 0, GFP_ATOMIC)) {
418 skb_reset_network_header(skb);
420 skb->protocol = htons(ETH_P_TIPC);
421 dev_hard_header(skb, dev, ETH_P_TIPC, dest->value,
422 dev->dev_addr, skb->len);
427 int tipc_bearer_mtu(struct net *net, u32 bearer_id)
430 struct tipc_bearer *b;
433 b = rcu_dereference_rtnl(tipc_net(net)->bearer_list[bearer_id]);
440 /* tipc_bearer_xmit_skb - sends buffer to destination over bearer
442 void tipc_bearer_xmit_skb(struct net *net, u32 bearer_id,
444 struct tipc_media_addr *dest)
446 struct tipc_net *tn = tipc_net(net);
447 struct tipc_bearer *b;
450 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
452 b->media->send_msg(net, skb, b, dest);
456 /* tipc_bearer_xmit() -send buffer to destination over bearer
458 void tipc_bearer_xmit(struct net *net, u32 bearer_id,
459 struct sk_buff_head *xmitq,
460 struct tipc_media_addr *dst)
462 struct tipc_net *tn = net_generic(net, tipc_net_id);
463 struct tipc_bearer *b;
464 struct sk_buff *skb, *tmp;
466 if (skb_queue_empty(xmitq))
470 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
472 skb_queue_walk_safe(xmitq, skb, tmp) {
473 __skb_dequeue(xmitq);
474 b->media->send_msg(net, skb, b, dst);
480 /* tipc_bearer_bc_xmit() - broadcast buffers to all destinations
482 void tipc_bearer_bc_xmit(struct net *net, u32 bearer_id,
483 struct sk_buff_head *xmitq)
485 struct tipc_net *tn = tipc_net(net);
486 int net_id = tn->net_id;
487 struct tipc_bearer *b;
488 struct sk_buff *skb, *tmp;
489 struct tipc_msg *hdr;
492 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
494 skb_queue_walk_safe(xmitq, skb, tmp) {
496 msg_set_non_seq(hdr, 1);
497 msg_set_mc_netid(hdr, net_id);
498 __skb_dequeue(xmitq);
499 b->media->send_msg(net, skb, b, &b->bcast_addr);
506 * tipc_l2_rcv_msg - handle incoming TIPC message from an interface
507 * @buf: the received packet
508 * @dev: the net device that the packet was received on
509 * @pt: the packet_type structure which was used to register this handler
510 * @orig_dev: the original receive net device in case the device is a bond
512 * Accept only packets explicitly sent to this node, or broadcast packets;
513 * ignores packets sent using interface multicast, and traffic sent to other
514 * nodes (which can happen if interface is running in promiscuous mode).
516 static int tipc_l2_rcv_msg(struct sk_buff *buf, struct net_device *dev,
517 struct packet_type *pt, struct net_device *orig_dev)
519 struct tipc_bearer *b;
522 b = rcu_dereference_rtnl(dev->tipc_ptr);
524 if (likely(buf->pkt_type <= PACKET_BROADCAST)) {
526 tipc_rcv(dev_net(dev), buf, b);
528 return NET_RX_SUCCESS;
538 * tipc_l2_device_event - handle device events from network device
539 * @nb: the context of the notification
540 * @evt: the type of event
541 * @ptr: the net device that the event was on
543 * This function is called by the Ethernet driver in case of link
546 static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt,
549 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
550 struct net *net = dev_net(dev);
551 struct tipc_bearer *b;
553 b = rtnl_dereference(dev->tipc_ptr);
561 if (netif_carrier_ok(dev))
563 case NETDEV_GOING_DOWN:
564 case NETDEV_CHANGEMTU:
565 tipc_reset_bearer(net, b);
567 case NETDEV_CHANGEADDR:
568 b->media->raw2addr(b, &b->addr,
569 (char *)dev->dev_addr);
570 tipc_reset_bearer(net, b);
572 case NETDEV_UNREGISTER:
573 case NETDEV_CHANGENAME:
574 bearer_disable(dev_net(dev), b);
580 static struct packet_type tipc_packet_type __read_mostly = {
581 .type = htons(ETH_P_TIPC),
582 .func = tipc_l2_rcv_msg,
585 static struct notifier_block notifier = {
586 .notifier_call = tipc_l2_device_event,
590 int tipc_bearer_setup(void)
594 err = register_netdevice_notifier(¬ifier);
597 dev_add_pack(&tipc_packet_type);
601 void tipc_bearer_cleanup(void)
603 unregister_netdevice_notifier(¬ifier);
604 dev_remove_pack(&tipc_packet_type);
607 void tipc_bearer_stop(struct net *net)
609 struct tipc_net *tn = net_generic(net, tipc_net_id);
610 struct tipc_bearer *b;
613 for (i = 0; i < MAX_BEARERS; i++) {
614 b = rtnl_dereference(tn->bearer_list[i]);
616 bearer_disable(net, b);
617 tn->bearer_list[i] = NULL;
622 /* Caller should hold rtnl_lock to protect the bearer */
623 static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg,
624 struct tipc_bearer *bearer, int nlflags)
627 struct nlattr *attrs;
630 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
631 nlflags, TIPC_NL_BEARER_GET);
635 attrs = nla_nest_start(msg->skb, TIPC_NLA_BEARER);
639 if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name))
642 prop = nla_nest_start(msg->skb, TIPC_NLA_BEARER_PROP);
645 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority))
647 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance))
649 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window))
652 nla_nest_end(msg->skb, prop);
653 nla_nest_end(msg->skb, attrs);
654 genlmsg_end(msg->skb, hdr);
659 nla_nest_cancel(msg->skb, prop);
661 nla_nest_cancel(msg->skb, attrs);
663 genlmsg_cancel(msg->skb, hdr);
668 int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb)
672 struct tipc_bearer *bearer;
673 struct tipc_nl_msg msg;
674 struct net *net = sock_net(skb->sk);
675 struct tipc_net *tn = net_generic(net, tipc_net_id);
677 if (i == MAX_BEARERS)
681 msg.portid = NETLINK_CB(cb->skb).portid;
682 msg.seq = cb->nlh->nlmsg_seq;
685 for (i = 0; i < MAX_BEARERS; i++) {
686 bearer = rtnl_dereference(tn->bearer_list[i]);
690 err = __tipc_nl_add_bearer(&msg, bearer, NLM_F_MULTI);
700 int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info)
705 struct tipc_bearer *bearer;
706 struct tipc_nl_msg msg;
707 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
708 struct net *net = genl_info_net(info);
710 if (!info->attrs[TIPC_NLA_BEARER])
713 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
714 info->attrs[TIPC_NLA_BEARER],
715 tipc_nl_bearer_policy);
719 if (!attrs[TIPC_NLA_BEARER_NAME])
721 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
723 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
728 msg.portid = info->snd_portid;
729 msg.seq = info->snd_seq;
732 bearer = tipc_bearer_find(net, name);
738 err = __tipc_nl_add_bearer(&msg, bearer, 0);
743 return genlmsg_reply(rep, info);
751 int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info)
755 struct tipc_bearer *bearer;
756 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
757 struct net *net = sock_net(skb->sk);
759 if (!info->attrs[TIPC_NLA_BEARER])
762 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
763 info->attrs[TIPC_NLA_BEARER],
764 tipc_nl_bearer_policy);
768 if (!attrs[TIPC_NLA_BEARER_NAME])
771 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
774 bearer = tipc_bearer_find(net, name);
780 bearer_disable(net, bearer);
786 int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
790 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
791 struct net *net = sock_net(skb->sk);
792 struct tipc_net *tn = net_generic(net, tipc_net_id);
796 prio = TIPC_MEDIA_LINK_PRI;
797 domain = tn->own_addr & TIPC_CLUSTER_MASK;
799 if (!info->attrs[TIPC_NLA_BEARER])
802 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
803 info->attrs[TIPC_NLA_BEARER],
804 tipc_nl_bearer_policy);
808 if (!attrs[TIPC_NLA_BEARER_NAME])
811 bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
813 if (attrs[TIPC_NLA_BEARER_DOMAIN])
814 domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]);
816 if (attrs[TIPC_NLA_BEARER_PROP]) {
817 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
819 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
824 if (props[TIPC_NLA_PROP_PRIO])
825 prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
829 err = tipc_enable_bearer(net, bearer, domain, prio, attrs);
839 int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
843 struct tipc_bearer *b;
844 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
845 struct net *net = sock_net(skb->sk);
847 if (!info->attrs[TIPC_NLA_BEARER])
850 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
851 info->attrs[TIPC_NLA_BEARER],
852 tipc_nl_bearer_policy);
856 if (!attrs[TIPC_NLA_BEARER_NAME])
858 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
861 b = tipc_bearer_find(net, name);
867 if (attrs[TIPC_NLA_BEARER_PROP]) {
868 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
870 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
877 if (props[TIPC_NLA_PROP_TOL])
878 b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
879 if (props[TIPC_NLA_PROP_PRIO])
880 b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
881 if (props[TIPC_NLA_PROP_WIN])
882 b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
889 static int __tipc_nl_add_media(struct tipc_nl_msg *msg,
890 struct tipc_media *media, int nlflags)
893 struct nlattr *attrs;
896 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
897 nlflags, TIPC_NL_MEDIA_GET);
901 attrs = nla_nest_start(msg->skb, TIPC_NLA_MEDIA);
905 if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name))
908 prop = nla_nest_start(msg->skb, TIPC_NLA_MEDIA_PROP);
911 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority))
913 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance))
915 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window))
918 nla_nest_end(msg->skb, prop);
919 nla_nest_end(msg->skb, attrs);
920 genlmsg_end(msg->skb, hdr);
925 nla_nest_cancel(msg->skb, prop);
927 nla_nest_cancel(msg->skb, attrs);
929 genlmsg_cancel(msg->skb, hdr);
934 int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb)
938 struct tipc_nl_msg msg;
944 msg.portid = NETLINK_CB(cb->skb).portid;
945 msg.seq = cb->nlh->nlmsg_seq;
948 for (; media_info_array[i] != NULL; i++) {
949 err = __tipc_nl_add_media(&msg, media_info_array[i],
960 int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info)
964 struct tipc_nl_msg msg;
965 struct tipc_media *media;
967 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
969 if (!info->attrs[TIPC_NLA_MEDIA])
972 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
973 info->attrs[TIPC_NLA_MEDIA],
974 tipc_nl_media_policy);
978 if (!attrs[TIPC_NLA_MEDIA_NAME])
980 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
982 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
987 msg.portid = info->snd_portid;
988 msg.seq = info->snd_seq;
991 media = tipc_media_find(name);
997 err = __tipc_nl_add_media(&msg, media, 0);
1002 return genlmsg_reply(rep, info);
1010 int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
1014 struct tipc_media *m;
1015 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1017 if (!info->attrs[TIPC_NLA_MEDIA])
1020 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
1021 info->attrs[TIPC_NLA_MEDIA],
1022 tipc_nl_media_policy);
1024 if (!attrs[TIPC_NLA_MEDIA_NAME])
1026 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1029 m = tipc_media_find(name);
1035 if (attrs[TIPC_NLA_MEDIA_PROP]) {
1036 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
1038 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP],
1045 if (props[TIPC_NLA_PROP_TOL])
1046 m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
1047 if (props[TIPC_NLA_PROP_PRIO])
1048 m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
1049 if (props[TIPC_NLA_PROP_WIN])
1050 m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);