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.
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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
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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.
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);
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;
113 m = media_find_id(a->media_id);
115 if (m && !m->addr2str(a, addr_str, sizeof(addr_str)))
116 ret = scnprintf(buf, len, "%s(%s)", m->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;
181 for (i = 0; i < MAX_BEARERS; i++) {
182 b = rtnl_dereference(tn->bearer_list[i]);
183 if (b && (!strcmp(b->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;
195 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
197 tipc_disc_add_dest(b->link_req);
201 void tipc_bearer_remove_dest(struct net *net, u32 bearer_id, u32 dest)
203 struct tipc_net *tn = net_generic(net, tipc_net_id);
204 struct tipc_bearer *b;
207 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
209 tipc_disc_remove_dest(b->link_req);
214 * tipc_enable_bearer - enable bearer with the given name
216 static int tipc_enable_bearer(struct net *net, const char *name,
217 u32 disc_domain, u32 priority,
218 struct nlattr *attr[])
220 struct tipc_net *tn = net_generic(net, tipc_net_id);
221 struct tipc_bearer *b;
222 struct tipc_media *m;
223 struct tipc_bearer_names b_names;
224 char addr_string[16];
231 pr_warn("Bearer <%s> rejected, not supported in standalone mode\n",
235 if (!bearer_name_validate(name, &b_names)) {
236 pr_warn("Bearer <%s> rejected, illegal name\n", name);
239 if (tipc_addr_domain_valid(disc_domain) &&
240 (disc_domain != tn->own_addr)) {
241 if (tipc_in_scope(disc_domain, tn->own_addr)) {
242 disc_domain = tn->own_addr & TIPC_CLUSTER_MASK;
243 res = 0; /* accept any node in own cluster */
244 } else if (in_own_cluster_exact(net, disc_domain))
245 res = 0; /* accept specified node in own cluster */
248 pr_warn("Bearer <%s> rejected, illegal discovery domain\n",
252 if ((priority > TIPC_MAX_LINK_PRI) &&
253 (priority != TIPC_MEDIA_LINK_PRI)) {
254 pr_warn("Bearer <%s> rejected, illegal priority\n", name);
258 m = tipc_media_find(b_names.media_name);
260 pr_warn("Bearer <%s> rejected, media <%s> not registered\n",
261 name, b_names.media_name);
265 if (priority == TIPC_MEDIA_LINK_PRI)
266 priority = m->priority;
269 bearer_id = MAX_BEARERS;
271 for (i = MAX_BEARERS; i-- != 0; ) {
272 b = rtnl_dereference(tn->bearer_list[i]);
277 if (!strcmp(name, b->name)) {
278 pr_warn("Bearer <%s> rejected, already enabled\n",
282 if ((b->priority == priority) &&
283 (++with_this_prio > 2)) {
284 if (priority-- == 0) {
285 pr_warn("Bearer <%s> rejected, duplicate priority\n",
289 pr_warn("Bearer <%s> priority adjustment required %u->%u\n",
290 name, priority + 1, priority);
294 if (bearer_id >= MAX_BEARERS) {
295 pr_warn("Bearer <%s> rejected, bearer limit reached (%u)\n",
300 b = kzalloc(sizeof(*b), GFP_ATOMIC);
304 strcpy(b->name, name);
306 res = m->enable_media(net, b, attr);
308 pr_warn("Bearer <%s> rejected, enable failure (%d)\n",
313 b->identity = bearer_id;
314 b->tolerance = m->tolerance;
315 b->window = m->window;
316 b->domain = disc_domain;
317 b->net_plane = bearer_id + 'A';
318 b->priority = priority;
320 res = tipc_disc_create(net, b, &b->bcast_addr);
322 bearer_disable(net, b);
323 pr_warn("Bearer <%s> rejected, discovery object creation failed\n",
328 rcu_assign_pointer(tn->bearer_list[bearer_id], b);
330 pr_info("Enabled bearer <%s>, discovery domain %s, priority %u\n",
332 tipc_addr_string_fill(addr_string, disc_domain), priority);
337 * tipc_reset_bearer - Reset all links established over this bearer
339 static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b)
341 pr_info("Resetting bearer <%s>\n", b->name);
342 tipc_node_delete_links(net, b->identity);
343 tipc_disc_reset(net, b);
350 * Note: This routine assumes caller holds RTNL lock.
352 static void bearer_disable(struct net *net, struct tipc_bearer *b)
354 struct tipc_net *tn = net_generic(net, tipc_net_id);
357 pr_info("Disabling bearer <%s>\n", b->name);
358 b->media->disable_media(b);
360 tipc_node_delete_links(net, b->identity);
361 RCU_INIT_POINTER(b->media_ptr, NULL);
363 tipc_disc_delete(b->link_req);
365 for (i = 0; i < MAX_BEARERS; i++) {
366 if (b == rtnl_dereference(tn->bearer_list[i])) {
367 RCU_INIT_POINTER(tn->bearer_list[i], NULL);
374 int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b,
375 struct nlattr *attr[])
377 struct net_device *dev;
378 char *driver_name = strchr((const char *)b->name, ':') + 1;
380 /* Find device with specified name */
381 dev = dev_get_by_name(net, driver_name);
385 /* Associate TIPC bearer with L2 bearer */
386 rcu_assign_pointer(b->media_ptr, dev);
387 memset(&b->bcast_addr, 0, sizeof(b->bcast_addr));
388 memcpy(b->bcast_addr.value, dev->broadcast, b->media->hwaddr_len);
389 b->bcast_addr.media_id = b->media->type_id;
390 b->bcast_addr.broadcast = 1;
392 b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr);
393 rcu_assign_pointer(dev->tipc_ptr, b);
397 /* tipc_disable_l2_media - detach TIPC bearer from an L2 interface
399 * Mark L2 bearer as inactive so that incoming buffers are thrown away
401 void tipc_disable_l2_media(struct tipc_bearer *b)
403 struct net_device *dev;
405 dev = (struct net_device *)rtnl_dereference(b->media_ptr);
406 RCU_INIT_POINTER(dev->tipc_ptr, NULL);
412 * tipc_l2_send_msg - send a TIPC packet out over an L2 interface
413 * @buf: the packet to be sent
414 * @b: the bearer through which the packet is to be sent
415 * @dest: peer destination address
417 int tipc_l2_send_msg(struct net *net, struct sk_buff *skb,
418 struct tipc_bearer *b, struct tipc_media_addr *dest)
420 struct net_device *dev;
423 dev = (struct net_device *)rcu_dereference_rtnl(b->media_ptr);
427 delta = dev->hard_header_len - skb_headroom(skb);
429 pskb_expand_head(skb, SKB_DATA_ALIGN(delta), 0, GFP_ATOMIC)) {
434 skb_reset_network_header(skb);
436 skb->protocol = htons(ETH_P_TIPC);
437 dev_hard_header(skb, dev, ETH_P_TIPC, dest->value,
438 dev->dev_addr, skb->len);
443 int tipc_bearer_mtu(struct net *net, u32 bearer_id)
446 struct tipc_bearer *b;
449 b = rcu_dereference_rtnl(tipc_net(net)->bearer_list[bearer_id]);
456 /* tipc_bearer_xmit_skb - sends buffer to destination over bearer
458 void tipc_bearer_xmit_skb(struct net *net, u32 bearer_id,
460 struct tipc_media_addr *dest)
462 struct tipc_net *tn = tipc_net(net);
463 struct tipc_bearer *b;
466 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
468 b->media->send_msg(net, skb, b, dest);
472 /* tipc_bearer_xmit() -send buffer to destination over bearer
474 void tipc_bearer_xmit(struct net *net, u32 bearer_id,
475 struct sk_buff_head *xmitq,
476 struct tipc_media_addr *dst)
478 struct tipc_net *tn = net_generic(net, tipc_net_id);
479 struct tipc_bearer *b;
480 struct sk_buff *skb, *tmp;
482 if (skb_queue_empty(xmitq))
486 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
488 skb_queue_walk_safe(xmitq, skb, tmp) {
489 __skb_dequeue(xmitq);
490 b->media->send_msg(net, skb, b, dst);
496 /* tipc_bearer_bc_xmit() - broadcast buffers to all destinations
498 void tipc_bearer_bc_xmit(struct net *net, u32 bearer_id,
499 struct sk_buff_head *xmitq)
501 struct tipc_net *tn = tipc_net(net);
502 int net_id = tn->net_id;
503 struct tipc_bearer *b;
504 struct sk_buff *skb, *tmp;
505 struct tipc_msg *hdr;
508 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
510 skb_queue_walk_safe(xmitq, skb, tmp) {
512 msg_set_non_seq(hdr, 1);
513 msg_set_mc_netid(hdr, net_id);
514 __skb_dequeue(xmitq);
515 b->media->send_msg(net, skb, b, &b->bcast_addr);
522 * tipc_l2_rcv_msg - handle incoming TIPC message from an interface
523 * @buf: the received packet
524 * @dev: the net device that the packet was received on
525 * @pt: the packet_type structure which was used to register this handler
526 * @orig_dev: the original receive net device in case the device is a bond
528 * Accept only packets explicitly sent to this node, or broadcast packets;
529 * ignores packets sent using interface multicast, and traffic sent to other
530 * nodes (which can happen if interface is running in promiscuous mode).
532 static int tipc_l2_rcv_msg(struct sk_buff *buf, struct net_device *dev,
533 struct packet_type *pt, struct net_device *orig_dev)
535 struct tipc_bearer *b;
538 b = rcu_dereference_rtnl(dev->tipc_ptr);
540 if (likely(buf->pkt_type <= PACKET_BROADCAST)) {
542 tipc_rcv(dev_net(dev), buf, b);
544 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_bearer *b;
569 b = rtnl_dereference(dev->tipc_ptr);
577 if (netif_carrier_ok(dev))
579 case NETDEV_GOING_DOWN:
580 case NETDEV_CHANGEMTU:
581 tipc_reset_bearer(net, b);
583 case NETDEV_CHANGEADDR:
584 b->media->raw2addr(b, &b->addr,
585 (char *)dev->dev_addr);
586 tipc_reset_bearer(net, b);
588 case NETDEV_UNREGISTER:
589 case NETDEV_CHANGENAME:
590 bearer_disable(dev_net(dev), b);
596 static struct packet_type tipc_packet_type __read_mostly = {
597 .type = htons(ETH_P_TIPC),
598 .func = tipc_l2_rcv_msg,
601 static struct notifier_block notifier = {
602 .notifier_call = tipc_l2_device_event,
606 int tipc_bearer_setup(void)
610 err = register_netdevice_notifier(¬ifier);
613 dev_add_pack(&tipc_packet_type);
617 void tipc_bearer_cleanup(void)
619 unregister_netdevice_notifier(¬ifier);
620 dev_remove_pack(&tipc_packet_type);
623 void tipc_bearer_stop(struct net *net)
625 struct tipc_net *tn = net_generic(net, tipc_net_id);
626 struct tipc_bearer *b;
629 for (i = 0; i < MAX_BEARERS; i++) {
630 b = rtnl_dereference(tn->bearer_list[i]);
632 bearer_disable(net, b);
633 tn->bearer_list[i] = NULL;
638 /* Caller should hold rtnl_lock to protect the bearer */
639 static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg,
640 struct tipc_bearer *bearer, int nlflags)
643 struct nlattr *attrs;
646 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
647 nlflags, TIPC_NL_BEARER_GET);
651 attrs = nla_nest_start(msg->skb, TIPC_NLA_BEARER);
655 if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name))
658 prop = nla_nest_start(msg->skb, TIPC_NLA_BEARER_PROP);
661 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority))
663 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance))
665 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window))
668 nla_nest_end(msg->skb, prop);
669 nla_nest_end(msg->skb, attrs);
670 genlmsg_end(msg->skb, hdr);
675 nla_nest_cancel(msg->skb, prop);
677 nla_nest_cancel(msg->skb, attrs);
679 genlmsg_cancel(msg->skb, hdr);
684 int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb)
688 struct tipc_bearer *bearer;
689 struct tipc_nl_msg msg;
690 struct net *net = sock_net(skb->sk);
691 struct tipc_net *tn = net_generic(net, tipc_net_id);
693 if (i == MAX_BEARERS)
697 msg.portid = NETLINK_CB(cb->skb).portid;
698 msg.seq = cb->nlh->nlmsg_seq;
701 for (i = 0; i < MAX_BEARERS; i++) {
702 bearer = rtnl_dereference(tn->bearer_list[i]);
706 err = __tipc_nl_add_bearer(&msg, bearer, NLM_F_MULTI);
716 int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info)
721 struct tipc_bearer *bearer;
722 struct tipc_nl_msg msg;
723 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
724 struct net *net = genl_info_net(info);
726 if (!info->attrs[TIPC_NLA_BEARER])
729 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
730 info->attrs[TIPC_NLA_BEARER],
731 tipc_nl_bearer_policy);
735 if (!attrs[TIPC_NLA_BEARER_NAME])
737 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
739 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
744 msg.portid = info->snd_portid;
745 msg.seq = info->snd_seq;
748 bearer = tipc_bearer_find(net, name);
754 err = __tipc_nl_add_bearer(&msg, bearer, 0);
759 return genlmsg_reply(rep, info);
767 int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info)
771 struct tipc_bearer *bearer;
772 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
773 struct net *net = sock_net(skb->sk);
775 if (!info->attrs[TIPC_NLA_BEARER])
778 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
779 info->attrs[TIPC_NLA_BEARER],
780 tipc_nl_bearer_policy);
784 if (!attrs[TIPC_NLA_BEARER_NAME])
787 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
790 bearer = tipc_bearer_find(net, name);
796 bearer_disable(net, bearer);
802 int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
806 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
807 struct net *net = sock_net(skb->sk);
808 struct tipc_net *tn = net_generic(net, tipc_net_id);
812 prio = TIPC_MEDIA_LINK_PRI;
813 domain = tn->own_addr & TIPC_CLUSTER_MASK;
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])
827 bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
829 if (attrs[TIPC_NLA_BEARER_DOMAIN])
830 domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]);
832 if (attrs[TIPC_NLA_BEARER_PROP]) {
833 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
835 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
840 if (props[TIPC_NLA_PROP_PRIO])
841 prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
845 err = tipc_enable_bearer(net, bearer, domain, prio, attrs);
855 int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
859 struct tipc_bearer *b;
860 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
861 struct net *net = sock_net(skb->sk);
863 if (!info->attrs[TIPC_NLA_BEARER])
866 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
867 info->attrs[TIPC_NLA_BEARER],
868 tipc_nl_bearer_policy);
872 if (!attrs[TIPC_NLA_BEARER_NAME])
874 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
877 b = tipc_bearer_find(net, name);
883 if (attrs[TIPC_NLA_BEARER_PROP]) {
884 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
886 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
893 if (props[TIPC_NLA_PROP_TOL])
894 b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
895 if (props[TIPC_NLA_PROP_PRIO])
896 b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
897 if (props[TIPC_NLA_PROP_WIN])
898 b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
905 static int __tipc_nl_add_media(struct tipc_nl_msg *msg,
906 struct tipc_media *media, int nlflags)
909 struct nlattr *attrs;
912 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
913 nlflags, TIPC_NL_MEDIA_GET);
917 attrs = nla_nest_start(msg->skb, TIPC_NLA_MEDIA);
921 if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name))
924 prop = nla_nest_start(msg->skb, TIPC_NLA_MEDIA_PROP);
927 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority))
929 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance))
931 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window))
934 nla_nest_end(msg->skb, prop);
935 nla_nest_end(msg->skb, attrs);
936 genlmsg_end(msg->skb, hdr);
941 nla_nest_cancel(msg->skb, prop);
943 nla_nest_cancel(msg->skb, attrs);
945 genlmsg_cancel(msg->skb, hdr);
950 int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb)
954 struct tipc_nl_msg msg;
960 msg.portid = NETLINK_CB(cb->skb).portid;
961 msg.seq = cb->nlh->nlmsg_seq;
964 for (; media_info_array[i] != NULL; i++) {
965 err = __tipc_nl_add_media(&msg, media_info_array[i],
976 int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info)
980 struct tipc_nl_msg msg;
981 struct tipc_media *media;
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);
994 if (!attrs[TIPC_NLA_MEDIA_NAME])
996 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
998 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1003 msg.portid = info->snd_portid;
1004 msg.seq = info->snd_seq;
1007 media = tipc_media_find(name);
1013 err = __tipc_nl_add_media(&msg, media, 0);
1018 return genlmsg_reply(rep, info);
1026 int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
1030 struct tipc_media *m;
1031 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1033 if (!info->attrs[TIPC_NLA_MEDIA])
1036 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
1037 info->attrs[TIPC_NLA_MEDIA],
1038 tipc_nl_media_policy);
1040 if (!attrs[TIPC_NLA_MEDIA_NAME])
1042 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1045 m = tipc_media_find(name);
1051 if (attrs[TIPC_NLA_MEDIA_PROP]) {
1052 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
1054 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP],
1061 if (props[TIPC_NLA_PROP_TOL])
1062 m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
1063 if (props[TIPC_NLA_PROP_PRIO])
1064 m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
1065 if (props[TIPC_NLA_PROP_WIN])
1066 m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);