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.
44 #define MAX_ADDR_STR 60
46 static struct tipc_media * const media_info_array[] = {
48 #ifdef CONFIG_TIPC_MEDIA_IB
51 #ifdef CONFIG_TIPC_MEDIA_UDP
57 static const struct nla_policy
58 tipc_nl_bearer_policy[TIPC_NLA_BEARER_MAX + 1] = {
59 [TIPC_NLA_BEARER_UNSPEC] = { .type = NLA_UNSPEC },
60 [TIPC_NLA_BEARER_NAME] = {
62 .len = TIPC_MAX_BEARER_NAME
64 [TIPC_NLA_BEARER_PROP] = { .type = NLA_NESTED },
65 [TIPC_NLA_BEARER_DOMAIN] = { .type = NLA_U32 }
68 static const struct nla_policy tipc_nl_media_policy[TIPC_NLA_MEDIA_MAX + 1] = {
69 [TIPC_NLA_MEDIA_UNSPEC] = { .type = NLA_UNSPEC },
70 [TIPC_NLA_MEDIA_NAME] = { .type = NLA_STRING },
71 [TIPC_NLA_MEDIA_PROP] = { .type = NLA_NESTED }
74 static void bearer_disable(struct net *net, struct tipc_bearer *b_ptr);
77 * tipc_media_find - locates specified media object by name
79 struct tipc_media *tipc_media_find(const char *name)
83 for (i = 0; media_info_array[i] != NULL; i++) {
84 if (!strcmp(media_info_array[i]->name, name))
87 return media_info_array[i];
91 * media_find_id - locates specified media object by type identifier
93 static struct tipc_media *media_find_id(u8 type)
97 for (i = 0; media_info_array[i] != NULL; i++) {
98 if (media_info_array[i]->type_id == type)
101 return media_info_array[i];
105 * tipc_media_addr_printf - record media address in print buffer
107 void tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a)
109 char addr_str[MAX_ADDR_STR];
110 struct tipc_media *m_ptr;
113 m_ptr = media_find_id(a->media_id);
115 if (m_ptr && !m_ptr->addr2str(a, addr_str, sizeof(addr_str)))
116 ret = scnprintf(buf, len, "%s(%s)", m_ptr->name, addr_str);
120 ret = scnprintf(buf, len, "UNKNOWN(%u)", a->media_id);
121 for (i = 0; i < sizeof(a->value); i++)
122 ret += scnprintf(buf - ret, len + ret,
123 "-%02x", a->value[i]);
128 * bearer_name_validate - validate & (optionally) deconstruct bearer name
129 * @name: ptr to bearer name string
130 * @name_parts: ptr to area for bearer name components (or NULL if not needed)
132 * Returns 1 if bearer name is valid, otherwise 0.
134 static int bearer_name_validate(const char *name,
135 struct tipc_bearer_names *name_parts)
137 char name_copy[TIPC_MAX_BEARER_NAME];
143 /* copy bearer name & ensure length is OK */
144 name_copy[TIPC_MAX_BEARER_NAME - 1] = 0;
145 /* need above in case non-Posix strncpy() doesn't pad with nulls */
146 strncpy(name_copy, name, TIPC_MAX_BEARER_NAME);
147 if (name_copy[TIPC_MAX_BEARER_NAME - 1] != 0)
150 /* ensure all component parts of bearer name are present */
151 media_name = name_copy;
152 if_name = strchr(media_name, ':');
156 media_len = if_name - media_name;
157 if_len = strlen(if_name) + 1;
159 /* validate component parts of bearer name */
160 if ((media_len <= 1) || (media_len > TIPC_MAX_MEDIA_NAME) ||
161 (if_len <= 1) || (if_len > TIPC_MAX_IF_NAME))
164 /* return bearer name components, if necessary */
166 strcpy(name_parts->media_name, media_name);
167 strcpy(name_parts->if_name, if_name);
173 * tipc_bearer_find - locates bearer object with matching bearer name
175 struct tipc_bearer *tipc_bearer_find(struct net *net, const char *name)
177 struct tipc_net *tn = net_generic(net, tipc_net_id);
178 struct tipc_bearer *b_ptr;
181 for (i = 0; i < MAX_BEARERS; i++) {
182 b_ptr = rtnl_dereference(tn->bearer_list[i]);
183 if (b_ptr && (!strcmp(b_ptr->name, name)))
189 void tipc_bearer_add_dest(struct net *net, u32 bearer_id, u32 dest)
191 struct tipc_net *tn = net_generic(net, tipc_net_id);
192 struct tipc_bearer *b_ptr;
195 b_ptr = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
197 tipc_bcbearer_sort(net, &b_ptr->nodes, dest, true);
198 tipc_disc_add_dest(b_ptr->link_req);
203 void tipc_bearer_remove_dest(struct net *net, u32 bearer_id, u32 dest)
205 struct tipc_net *tn = net_generic(net, tipc_net_id);
206 struct tipc_bearer *b_ptr;
209 b_ptr = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
211 tipc_bcbearer_sort(net, &b_ptr->nodes, dest, false);
212 tipc_disc_remove_dest(b_ptr->link_req);
218 * tipc_enable_bearer - enable bearer with the given name
220 static int tipc_enable_bearer(struct net *net, const char *name,
221 u32 disc_domain, u32 priority,
222 struct nlattr *attr[])
224 struct tipc_net *tn = net_generic(net, tipc_net_id);
225 struct tipc_bearer *b_ptr;
226 struct tipc_media *m_ptr;
227 struct tipc_bearer_names b_names;
228 char addr_string[16];
235 pr_warn("Bearer <%s> rejected, not supported in standalone mode\n",
239 if (!bearer_name_validate(name, &b_names)) {
240 pr_warn("Bearer <%s> rejected, illegal name\n", name);
243 if (tipc_addr_domain_valid(disc_domain) &&
244 (disc_domain != tn->own_addr)) {
245 if (tipc_in_scope(disc_domain, tn->own_addr)) {
246 disc_domain = tn->own_addr & TIPC_CLUSTER_MASK;
247 res = 0; /* accept any node in own cluster */
248 } else if (in_own_cluster_exact(net, disc_domain))
249 res = 0; /* accept specified node in own cluster */
252 pr_warn("Bearer <%s> rejected, illegal discovery domain\n",
256 if ((priority > TIPC_MAX_LINK_PRI) &&
257 (priority != TIPC_MEDIA_LINK_PRI)) {
258 pr_warn("Bearer <%s> rejected, illegal priority\n", name);
262 m_ptr = tipc_media_find(b_names.media_name);
264 pr_warn("Bearer <%s> rejected, media <%s> not registered\n",
265 name, b_names.media_name);
269 if (priority == TIPC_MEDIA_LINK_PRI)
270 priority = m_ptr->priority;
273 bearer_id = MAX_BEARERS;
275 for (i = MAX_BEARERS; i-- != 0; ) {
276 b_ptr = rtnl_dereference(tn->bearer_list[i]);
281 if (!strcmp(name, b_ptr->name)) {
282 pr_warn("Bearer <%s> rejected, already enabled\n",
286 if ((b_ptr->priority == priority) &&
287 (++with_this_prio > 2)) {
288 if (priority-- == 0) {
289 pr_warn("Bearer <%s> rejected, duplicate priority\n",
293 pr_warn("Bearer <%s> priority adjustment required %u->%u\n",
294 name, priority + 1, priority);
298 if (bearer_id >= MAX_BEARERS) {
299 pr_warn("Bearer <%s> rejected, bearer limit reached (%u)\n",
304 b_ptr = kzalloc(sizeof(*b_ptr), GFP_ATOMIC);
308 strcpy(b_ptr->name, name);
309 b_ptr->media = m_ptr;
310 res = m_ptr->enable_media(net, b_ptr, attr);
312 pr_warn("Bearer <%s> rejected, enable failure (%d)\n",
317 b_ptr->identity = bearer_id;
318 b_ptr->tolerance = m_ptr->tolerance;
319 b_ptr->window = m_ptr->window;
320 b_ptr->domain = disc_domain;
321 b_ptr->net_plane = bearer_id + 'A';
322 b_ptr->priority = priority;
324 res = tipc_disc_create(net, b_ptr, &b_ptr->bcast_addr);
326 bearer_disable(net, b_ptr);
327 pr_warn("Bearer <%s> rejected, discovery object creation failed\n",
332 rcu_assign_pointer(tn->bearer_list[bearer_id], b_ptr);
334 pr_info("Enabled bearer <%s>, discovery domain %s, priority %u\n",
336 tipc_addr_string_fill(addr_string, disc_domain), priority);
341 * tipc_reset_bearer - Reset all links established over this bearer
343 static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b_ptr)
345 pr_info("Resetting bearer <%s>\n", b_ptr->name);
346 tipc_link_delete_list(net, b_ptr->identity);
347 tipc_disc_reset(net, b_ptr);
354 * Note: This routine assumes caller holds RTNL lock.
356 static void bearer_disable(struct net *net, struct tipc_bearer *b_ptr)
358 struct tipc_net *tn = net_generic(net, tipc_net_id);
361 pr_info("Disabling bearer <%s>\n", b_ptr->name);
362 b_ptr->media->disable_media(b_ptr);
364 tipc_link_delete_list(net, b_ptr->identity);
366 tipc_disc_delete(b_ptr->link_req);
368 for (i = 0; i < MAX_BEARERS; i++) {
369 if (b_ptr == rtnl_dereference(tn->bearer_list[i])) {
370 RCU_INIT_POINTER(tn->bearer_list[i], NULL);
374 kfree_rcu(b_ptr, rcu);
377 int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b,
378 struct nlattr *attr[])
380 struct net_device *dev;
381 char *driver_name = strchr((const char *)b->name, ':') + 1;
383 /* Find device with specified name */
384 dev = dev_get_by_name(net, driver_name);
388 /* Associate TIPC bearer with L2 bearer */
389 rcu_assign_pointer(b->media_ptr, dev);
390 memset(&b->bcast_addr, 0, sizeof(b->bcast_addr));
391 memcpy(b->bcast_addr.value, dev->broadcast, b->media->hwaddr_len);
392 b->bcast_addr.media_id = b->media->type_id;
393 b->bcast_addr.broadcast = 1;
395 b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr);
396 rcu_assign_pointer(dev->tipc_ptr, b);
400 /* tipc_disable_l2_media - detach TIPC bearer from an L2 interface
402 * Mark L2 bearer as inactive so that incoming buffers are thrown away,
403 * then get worker thread to complete bearer cleanup. (Can't do cleanup
404 * here because cleanup code needs to sleep and caller holds spinlocks.)
406 void tipc_disable_l2_media(struct tipc_bearer *b)
408 struct net_device *dev;
410 dev = (struct net_device *)rtnl_dereference(b->media_ptr);
411 RCU_INIT_POINTER(b->media_ptr, NULL);
412 RCU_INIT_POINTER(dev->tipc_ptr, NULL);
418 * tipc_l2_send_msg - send a TIPC packet out over an L2 interface
419 * @buf: the packet to be sent
420 * @b_ptr: the bearer through which the packet is to be sent
421 * @dest: peer destination address
423 int tipc_l2_send_msg(struct net *net, struct sk_buff *buf,
424 struct tipc_bearer *b, struct tipc_media_addr *dest)
426 struct sk_buff *clone;
427 struct net_device *dev;
430 dev = (struct net_device *)rcu_dereference_rtnl(b->media_ptr);
434 clone = skb_clone(buf, GFP_ATOMIC);
438 delta = dev->hard_header_len - skb_headroom(buf);
440 pskb_expand_head(clone, SKB_DATA_ALIGN(delta), 0, GFP_ATOMIC)) {
445 skb_reset_network_header(clone);
447 clone->protocol = htons(ETH_P_TIPC);
448 dev_hard_header(clone, dev, ETH_P_TIPC, dest->value,
449 dev->dev_addr, clone->len);
450 dev_queue_xmit(clone);
454 /* tipc_bearer_send- sends buffer to destination over bearer
457 * The media send routine must not alter the buffer being passed in
458 * as it may be needed for later retransmission!
460 void tipc_bearer_send(struct net *net, u32 bearer_id, struct sk_buff *buf,
461 struct tipc_media_addr *dest)
463 struct tipc_net *tn = net_generic(net, tipc_net_id);
464 struct tipc_bearer *b_ptr;
467 b_ptr = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
469 b_ptr->media->send_msg(net, buf, b_ptr, dest);
474 * tipc_l2_rcv_msg - handle incoming TIPC message from an interface
475 * @buf: the received packet
476 * @dev: the net device that the packet was received on
477 * @pt: the packet_type structure which was used to register this handler
478 * @orig_dev: the original receive net device in case the device is a bond
480 * Accept only packets explicitly sent to this node, or broadcast packets;
481 * ignores packets sent using interface multicast, and traffic sent to other
482 * nodes (which can happen if interface is running in promiscuous mode).
484 static int tipc_l2_rcv_msg(struct sk_buff *buf, struct net_device *dev,
485 struct packet_type *pt, struct net_device *orig_dev)
487 struct tipc_bearer *b_ptr;
490 b_ptr = rcu_dereference_rtnl(dev->tipc_ptr);
492 if (likely(buf->pkt_type <= PACKET_BROADCAST)) {
494 tipc_rcv(dev_net(dev), buf, b_ptr);
496 return NET_RX_SUCCESS;
506 * tipc_l2_device_event - handle device events from network device
507 * @nb: the context of the notification
508 * @evt: the type of event
509 * @ptr: the net device that the event was on
511 * This function is called by the Ethernet driver in case of link
514 static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt,
517 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
518 struct net *net = dev_net(dev);
519 struct tipc_bearer *b_ptr;
521 b_ptr = rtnl_dereference(dev->tipc_ptr);
525 b_ptr->mtu = dev->mtu;
529 if (netif_carrier_ok(dev))
532 case NETDEV_CHANGEMTU:
533 tipc_reset_bearer(net, b_ptr);
535 case NETDEV_CHANGEADDR:
536 b_ptr->media->raw2addr(b_ptr, &b_ptr->addr,
537 (char *)dev->dev_addr);
538 tipc_reset_bearer(net, b_ptr);
540 case NETDEV_UNREGISTER:
541 case NETDEV_CHANGENAME:
542 bearer_disable(dev_net(dev), b_ptr);
548 static struct packet_type tipc_packet_type __read_mostly = {
549 .type = htons(ETH_P_TIPC),
550 .func = tipc_l2_rcv_msg,
553 static struct notifier_block notifier = {
554 .notifier_call = tipc_l2_device_event,
558 int tipc_bearer_setup(void)
562 err = register_netdevice_notifier(¬ifier);
565 dev_add_pack(&tipc_packet_type);
569 void tipc_bearer_cleanup(void)
571 unregister_netdevice_notifier(¬ifier);
572 dev_remove_pack(&tipc_packet_type);
575 void tipc_bearer_stop(struct net *net)
577 struct tipc_net *tn = net_generic(net, tipc_net_id);
578 struct tipc_bearer *b_ptr;
581 for (i = 0; i < MAX_BEARERS; i++) {
582 b_ptr = rtnl_dereference(tn->bearer_list[i]);
584 bearer_disable(net, b_ptr);
585 tn->bearer_list[i] = NULL;
590 /* Caller should hold rtnl_lock to protect the bearer */
591 static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg,
592 struct tipc_bearer *bearer, int nlflags)
595 struct nlattr *attrs;
598 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
599 nlflags, TIPC_NL_BEARER_GET);
603 attrs = nla_nest_start(msg->skb, TIPC_NLA_BEARER);
607 if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name))
610 prop = nla_nest_start(msg->skb, TIPC_NLA_BEARER_PROP);
613 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority))
615 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance))
617 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window))
620 nla_nest_end(msg->skb, prop);
621 nla_nest_end(msg->skb, attrs);
622 genlmsg_end(msg->skb, hdr);
627 nla_nest_cancel(msg->skb, prop);
629 nla_nest_cancel(msg->skb, attrs);
631 genlmsg_cancel(msg->skb, hdr);
636 int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb)
640 struct tipc_bearer *bearer;
641 struct tipc_nl_msg msg;
642 struct net *net = sock_net(skb->sk);
643 struct tipc_net *tn = net_generic(net, tipc_net_id);
645 if (i == MAX_BEARERS)
649 msg.portid = NETLINK_CB(cb->skb).portid;
650 msg.seq = cb->nlh->nlmsg_seq;
653 for (i = 0; i < MAX_BEARERS; i++) {
654 bearer = rtnl_dereference(tn->bearer_list[i]);
658 err = __tipc_nl_add_bearer(&msg, bearer, NLM_F_MULTI);
668 int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info)
673 struct tipc_bearer *bearer;
674 struct tipc_nl_msg msg;
675 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
676 struct net *net = genl_info_net(info);
678 if (!info->attrs[TIPC_NLA_BEARER])
681 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
682 info->attrs[TIPC_NLA_BEARER],
683 tipc_nl_bearer_policy);
687 if (!attrs[TIPC_NLA_BEARER_NAME])
689 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
691 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
696 msg.portid = info->snd_portid;
697 msg.seq = info->snd_seq;
700 bearer = tipc_bearer_find(net, name);
706 err = __tipc_nl_add_bearer(&msg, bearer, 0);
711 return genlmsg_reply(rep, info);
719 int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info)
723 struct tipc_bearer *bearer;
724 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
725 struct net *net = sock_net(skb->sk);
727 if (!info->attrs[TIPC_NLA_BEARER])
730 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
731 info->attrs[TIPC_NLA_BEARER],
732 tipc_nl_bearer_policy);
736 if (!attrs[TIPC_NLA_BEARER_NAME])
739 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
742 bearer = tipc_bearer_find(net, name);
748 bearer_disable(net, bearer);
754 int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
758 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
759 struct net *net = sock_net(skb->sk);
760 struct tipc_net *tn = net_generic(net, tipc_net_id);
764 prio = TIPC_MEDIA_LINK_PRI;
765 domain = tn->own_addr & TIPC_CLUSTER_MASK;
767 if (!info->attrs[TIPC_NLA_BEARER])
770 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
771 info->attrs[TIPC_NLA_BEARER],
772 tipc_nl_bearer_policy);
776 if (!attrs[TIPC_NLA_BEARER_NAME])
779 bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
781 if (attrs[TIPC_NLA_BEARER_DOMAIN])
782 domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]);
784 if (attrs[TIPC_NLA_BEARER_PROP]) {
785 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
787 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
792 if (props[TIPC_NLA_PROP_PRIO])
793 prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
797 err = tipc_enable_bearer(net, bearer, domain, prio, attrs);
807 int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
811 struct tipc_bearer *b;
812 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
813 struct net *net = sock_net(skb->sk);
815 if (!info->attrs[TIPC_NLA_BEARER])
818 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
819 info->attrs[TIPC_NLA_BEARER],
820 tipc_nl_bearer_policy);
824 if (!attrs[TIPC_NLA_BEARER_NAME])
826 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
829 b = tipc_bearer_find(net, name);
835 if (attrs[TIPC_NLA_BEARER_PROP]) {
836 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
838 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
845 if (props[TIPC_NLA_PROP_TOL])
846 b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
847 if (props[TIPC_NLA_PROP_PRIO])
848 b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
849 if (props[TIPC_NLA_PROP_WIN])
850 b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
857 static int __tipc_nl_add_media(struct tipc_nl_msg *msg,
858 struct tipc_media *media, int nlflags)
861 struct nlattr *attrs;
864 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
865 nlflags, TIPC_NL_MEDIA_GET);
869 attrs = nla_nest_start(msg->skb, TIPC_NLA_MEDIA);
873 if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name))
876 prop = nla_nest_start(msg->skb, TIPC_NLA_MEDIA_PROP);
879 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority))
881 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance))
883 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window))
886 nla_nest_end(msg->skb, prop);
887 nla_nest_end(msg->skb, attrs);
888 genlmsg_end(msg->skb, hdr);
893 nla_nest_cancel(msg->skb, prop);
895 nla_nest_cancel(msg->skb, attrs);
897 genlmsg_cancel(msg->skb, hdr);
902 int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb)
906 struct tipc_nl_msg msg;
912 msg.portid = NETLINK_CB(cb->skb).portid;
913 msg.seq = cb->nlh->nlmsg_seq;
916 for (; media_info_array[i] != NULL; i++) {
917 err = __tipc_nl_add_media(&msg, media_info_array[i],
928 int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info)
932 struct tipc_nl_msg msg;
933 struct tipc_media *media;
935 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
937 if (!info->attrs[TIPC_NLA_MEDIA])
940 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
941 info->attrs[TIPC_NLA_MEDIA],
942 tipc_nl_media_policy);
946 if (!attrs[TIPC_NLA_MEDIA_NAME])
948 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
950 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
955 msg.portid = info->snd_portid;
956 msg.seq = info->snd_seq;
959 media = tipc_media_find(name);
965 err = __tipc_nl_add_media(&msg, media, 0);
970 return genlmsg_reply(rep, info);
978 int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
982 struct tipc_media *m;
983 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
985 if (!info->attrs[TIPC_NLA_MEDIA])
988 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
989 info->attrs[TIPC_NLA_MEDIA],
990 tipc_nl_media_policy);
992 if (!attrs[TIPC_NLA_MEDIA_NAME])
994 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
997 m = tipc_media_find(name);
1003 if (attrs[TIPC_NLA_MEDIA_PROP]) {
1004 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
1006 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP],
1013 if (props[TIPC_NLA_PROP_TOL])
1014 m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
1015 if (props[TIPC_NLA_PROP_PRIO])
1016 m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
1017 if (props[TIPC_NLA_PROP_WIN])
1018 m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);