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:
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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
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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
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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_disc_add_dest(b_ptr->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_ptr;
207 b_ptr = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
209 tipc_disc_remove_dest(b_ptr->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_ptr;
222 struct tipc_media *m_ptr;
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_ptr = 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_ptr->priority;
269 bearer_id = MAX_BEARERS;
271 for (i = MAX_BEARERS; i-- != 0; ) {
272 b_ptr = rtnl_dereference(tn->bearer_list[i]);
277 if (!strcmp(name, b_ptr->name)) {
278 pr_warn("Bearer <%s> rejected, already enabled\n",
282 if ((b_ptr->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_ptr = kzalloc(sizeof(*b_ptr), GFP_ATOMIC);
304 strcpy(b_ptr->name, name);
305 b_ptr->media = m_ptr;
306 res = m_ptr->enable_media(net, b_ptr, attr);
308 pr_warn("Bearer <%s> rejected, enable failure (%d)\n",
313 b_ptr->identity = bearer_id;
314 b_ptr->tolerance = m_ptr->tolerance;
315 b_ptr->window = m_ptr->window;
316 b_ptr->domain = disc_domain;
317 b_ptr->net_plane = bearer_id + 'A';
318 b_ptr->priority = priority;
320 res = tipc_disc_create(net, b_ptr, &b_ptr->bcast_addr);
322 bearer_disable(net, b_ptr);
323 pr_warn("Bearer <%s> rejected, discovery object creation failed\n",
328 rcu_assign_pointer(tn->bearer_list[bearer_id], b_ptr);
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_ptr)
341 pr_info("Resetting bearer <%s>\n", b_ptr->name);
342 tipc_node_delete_links(net, b_ptr->identity);
343 tipc_disc_reset(net, b_ptr);
350 * Note: This routine assumes caller holds RTNL lock.
352 static void bearer_disable(struct net *net, struct tipc_bearer *b_ptr)
354 struct tipc_net *tn = net_generic(net, tipc_net_id);
357 pr_info("Disabling bearer <%s>\n", b_ptr->name);
358 b_ptr->media->disable_media(b_ptr);
360 tipc_node_delete_links(net, b_ptr->identity);
361 RCU_INIT_POINTER(b_ptr->media_ptr, NULL);
363 tipc_disc_delete(b_ptr->link_req);
365 for (i = 0; i < MAX_BEARERS; i++) {
366 if (b_ptr == rtnl_dereference(tn->bearer_list[i])) {
367 RCU_INIT_POINTER(tn->bearer_list[i], NULL);
371 kfree_rcu(b_ptr, rcu);
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);
384 if (tipc_mtu_bad(dev, 0)) {
389 /* Associate TIPC bearer with L2 bearer */
390 rcu_assign_pointer(b->media_ptr, dev);
391 memset(&b->bcast_addr, 0, sizeof(b->bcast_addr));
392 memcpy(b->bcast_addr.value, dev->broadcast, b->media->hwaddr_len);
393 b->bcast_addr.media_id = b->media->type_id;
394 b->bcast_addr.broadcast = 1;
396 b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr);
397 rcu_assign_pointer(dev->tipc_ptr, b);
401 /* tipc_disable_l2_media - detach TIPC bearer from an L2 interface
403 * Mark L2 bearer as inactive so that incoming buffers are thrown away
405 void tipc_disable_l2_media(struct tipc_bearer *b)
407 struct net_device *dev;
409 dev = (struct net_device *)rtnl_dereference(b->media_ptr);
410 RCU_INIT_POINTER(dev->tipc_ptr, NULL);
416 * tipc_l2_send_msg - send a TIPC packet out over an L2 interface
417 * @buf: the packet to be sent
418 * @b_ptr: the bearer through which the packet is to be sent
419 * @dest: peer destination address
421 int tipc_l2_send_msg(struct net *net, struct sk_buff *skb,
422 struct tipc_bearer *b, struct tipc_media_addr *dest)
424 struct net_device *dev;
427 dev = (struct net_device *)rcu_dereference_rtnl(b->media_ptr);
431 delta = dev->hard_header_len - skb_headroom(skb);
433 pskb_expand_head(skb, SKB_DATA_ALIGN(delta), 0, GFP_ATOMIC)) {
438 skb_reset_network_header(skb);
440 skb->protocol = htons(ETH_P_TIPC);
441 dev_hard_header(skb, dev, ETH_P_TIPC, dest->value,
442 dev->dev_addr, skb->len);
447 int tipc_bearer_mtu(struct net *net, u32 bearer_id)
450 struct tipc_bearer *b;
453 b = rcu_dereference_rtnl(tipc_net(net)->bearer_list[bearer_id]);
460 /* tipc_bearer_xmit_skb - sends buffer to destination over bearer
462 void tipc_bearer_xmit_skb(struct net *net, u32 bearer_id,
464 struct tipc_media_addr *dest)
466 struct tipc_net *tn = tipc_net(net);
467 struct tipc_bearer *b;
470 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
472 b->media->send_msg(net, skb, b, dest);
476 /* tipc_bearer_xmit() -send buffer to destination over bearer
478 void tipc_bearer_xmit(struct net *net, u32 bearer_id,
479 struct sk_buff_head *xmitq,
480 struct tipc_media_addr *dst)
482 struct tipc_net *tn = net_generic(net, tipc_net_id);
483 struct tipc_bearer *b;
484 struct sk_buff *skb, *tmp;
486 if (skb_queue_empty(xmitq))
490 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
492 skb_queue_walk_safe(xmitq, skb, tmp) {
493 __skb_dequeue(xmitq);
494 b->media->send_msg(net, skb, b, dst);
500 /* tipc_bearer_bc_xmit() - broadcast buffers to all destinations
502 void tipc_bearer_bc_xmit(struct net *net, u32 bearer_id,
503 struct sk_buff_head *xmitq)
505 struct tipc_net *tn = tipc_net(net);
506 int net_id = tn->net_id;
507 struct tipc_bearer *b;
508 struct sk_buff *skb, *tmp;
509 struct tipc_msg *hdr;
512 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
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);
526 * tipc_l2_rcv_msg - handle incoming TIPC message from an interface
527 * @buf: the received packet
528 * @dev: the net device that the packet was received on
529 * @pt: the packet_type structure which was used to register this handler
530 * @orig_dev: the original receive net device in case the device is a bond
532 * Accept only packets explicitly sent to this node, or broadcast packets;
533 * ignores packets sent using interface multicast, and traffic sent to other
534 * nodes (which can happen if interface is running in promiscuous mode).
536 static int tipc_l2_rcv_msg(struct sk_buff *buf, struct net_device *dev,
537 struct packet_type *pt, struct net_device *orig_dev)
539 struct tipc_bearer *b_ptr;
542 b_ptr = rcu_dereference_rtnl(dev->tipc_ptr);
544 if (likely(buf->pkt_type <= PACKET_BROADCAST)) {
546 tipc_rcv(dev_net(dev), buf, b_ptr);
548 return NET_RX_SUCCESS;
558 * tipc_l2_device_event - handle device events from network device
559 * @nb: the context of the notification
560 * @evt: the type of event
561 * @ptr: the net device that the event was on
563 * This function is called by the Ethernet driver in case of link
566 static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt,
569 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
570 struct net *net = dev_net(dev);
571 struct tipc_bearer *b_ptr;
573 b_ptr = rtnl_dereference(dev->tipc_ptr);
579 if (netif_carrier_ok(dev))
581 case NETDEV_GOING_DOWN:
582 tipc_reset_bearer(net, b_ptr);
584 case NETDEV_CHANGEMTU:
585 if (tipc_mtu_bad(dev, 0)) {
586 bearer_disable(net, b_ptr);
589 b_ptr->mtu = dev->mtu;
590 tipc_reset_bearer(net, b_ptr);
592 case NETDEV_CHANGEADDR:
593 b_ptr->media->raw2addr(b_ptr, &b_ptr->addr,
594 (char *)dev->dev_addr);
595 tipc_reset_bearer(net, b_ptr);
597 case NETDEV_UNREGISTER:
598 case NETDEV_CHANGENAME:
599 bearer_disable(dev_net(dev), b_ptr);
605 static struct packet_type tipc_packet_type __read_mostly = {
606 .type = htons(ETH_P_TIPC),
607 .func = tipc_l2_rcv_msg,
610 static struct notifier_block notifier = {
611 .notifier_call = tipc_l2_device_event,
615 int tipc_bearer_setup(void)
619 err = register_netdevice_notifier(¬ifier);
622 dev_add_pack(&tipc_packet_type);
626 void tipc_bearer_cleanup(void)
628 unregister_netdevice_notifier(¬ifier);
629 dev_remove_pack(&tipc_packet_type);
632 void tipc_bearer_stop(struct net *net)
634 struct tipc_net *tn = net_generic(net, tipc_net_id);
635 struct tipc_bearer *b_ptr;
638 for (i = 0; i < MAX_BEARERS; i++) {
639 b_ptr = rtnl_dereference(tn->bearer_list[i]);
641 bearer_disable(net, b_ptr);
642 tn->bearer_list[i] = NULL;
647 /* Caller should hold rtnl_lock to protect the bearer */
648 static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg,
649 struct tipc_bearer *bearer, int nlflags)
652 struct nlattr *attrs;
655 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
656 nlflags, TIPC_NL_BEARER_GET);
660 attrs = nla_nest_start(msg->skb, TIPC_NLA_BEARER);
664 if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name))
667 prop = nla_nest_start(msg->skb, TIPC_NLA_BEARER_PROP);
670 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority))
672 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance))
674 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window))
677 nla_nest_end(msg->skb, prop);
678 nla_nest_end(msg->skb, attrs);
679 genlmsg_end(msg->skb, hdr);
684 nla_nest_cancel(msg->skb, prop);
686 nla_nest_cancel(msg->skb, attrs);
688 genlmsg_cancel(msg->skb, hdr);
693 int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb)
697 struct tipc_bearer *bearer;
698 struct tipc_nl_msg msg;
699 struct net *net = sock_net(skb->sk);
700 struct tipc_net *tn = net_generic(net, tipc_net_id);
702 if (i == MAX_BEARERS)
706 msg.portid = NETLINK_CB(cb->skb).portid;
707 msg.seq = cb->nlh->nlmsg_seq;
710 for (i = 0; i < MAX_BEARERS; i++) {
711 bearer = rtnl_dereference(tn->bearer_list[i]);
715 err = __tipc_nl_add_bearer(&msg, bearer, NLM_F_MULTI);
725 int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info)
730 struct tipc_bearer *bearer;
731 struct tipc_nl_msg msg;
732 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
733 struct net *net = genl_info_net(info);
735 if (!info->attrs[TIPC_NLA_BEARER])
738 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
739 info->attrs[TIPC_NLA_BEARER],
740 tipc_nl_bearer_policy);
744 if (!attrs[TIPC_NLA_BEARER_NAME])
746 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
748 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
753 msg.portid = info->snd_portid;
754 msg.seq = info->snd_seq;
757 bearer = tipc_bearer_find(net, name);
763 err = __tipc_nl_add_bearer(&msg, bearer, 0);
768 return genlmsg_reply(rep, info);
776 int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info)
780 struct tipc_bearer *bearer;
781 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
782 struct net *net = sock_net(skb->sk);
784 if (!info->attrs[TIPC_NLA_BEARER])
787 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
788 info->attrs[TIPC_NLA_BEARER],
789 tipc_nl_bearer_policy);
793 if (!attrs[TIPC_NLA_BEARER_NAME])
796 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
799 bearer = tipc_bearer_find(net, name);
805 bearer_disable(net, bearer);
811 int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
815 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
816 struct net *net = sock_net(skb->sk);
817 struct tipc_net *tn = net_generic(net, tipc_net_id);
821 prio = TIPC_MEDIA_LINK_PRI;
822 domain = tn->own_addr & TIPC_CLUSTER_MASK;
824 if (!info->attrs[TIPC_NLA_BEARER])
827 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
828 info->attrs[TIPC_NLA_BEARER],
829 tipc_nl_bearer_policy);
833 if (!attrs[TIPC_NLA_BEARER_NAME])
836 bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
838 if (attrs[TIPC_NLA_BEARER_DOMAIN])
839 domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]);
841 if (attrs[TIPC_NLA_BEARER_PROP]) {
842 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
844 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
849 if (props[TIPC_NLA_PROP_PRIO])
850 prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
854 err = tipc_enable_bearer(net, bearer, domain, prio, attrs);
864 int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
868 struct tipc_bearer *b;
869 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
870 struct net *net = sock_net(skb->sk);
872 if (!info->attrs[TIPC_NLA_BEARER])
875 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
876 info->attrs[TIPC_NLA_BEARER],
877 tipc_nl_bearer_policy);
881 if (!attrs[TIPC_NLA_BEARER_NAME])
883 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
886 b = tipc_bearer_find(net, name);
892 if (attrs[TIPC_NLA_BEARER_PROP]) {
893 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
895 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
902 if (props[TIPC_NLA_PROP_TOL])
903 b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
904 if (props[TIPC_NLA_PROP_PRIO])
905 b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
906 if (props[TIPC_NLA_PROP_WIN])
907 b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
914 static int __tipc_nl_add_media(struct tipc_nl_msg *msg,
915 struct tipc_media *media, int nlflags)
918 struct nlattr *attrs;
921 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
922 nlflags, TIPC_NL_MEDIA_GET);
926 attrs = nla_nest_start(msg->skb, TIPC_NLA_MEDIA);
930 if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name))
933 prop = nla_nest_start(msg->skb, TIPC_NLA_MEDIA_PROP);
936 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority))
938 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance))
940 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window))
943 nla_nest_end(msg->skb, prop);
944 nla_nest_end(msg->skb, attrs);
945 genlmsg_end(msg->skb, hdr);
950 nla_nest_cancel(msg->skb, prop);
952 nla_nest_cancel(msg->skb, attrs);
954 genlmsg_cancel(msg->skb, hdr);
959 int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb)
963 struct tipc_nl_msg msg;
969 msg.portid = NETLINK_CB(cb->skb).portid;
970 msg.seq = cb->nlh->nlmsg_seq;
973 for (; media_info_array[i] != NULL; i++) {
974 err = __tipc_nl_add_media(&msg, media_info_array[i],
985 int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info)
989 struct tipc_nl_msg msg;
990 struct tipc_media *media;
992 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
994 if (!info->attrs[TIPC_NLA_MEDIA])
997 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
998 info->attrs[TIPC_NLA_MEDIA],
999 tipc_nl_media_policy);
1003 if (!attrs[TIPC_NLA_MEDIA_NAME])
1005 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1007 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1012 msg.portid = info->snd_portid;
1013 msg.seq = info->snd_seq;
1016 media = tipc_media_find(name);
1022 err = __tipc_nl_add_media(&msg, media, 0);
1027 return genlmsg_reply(rep, info);
1035 int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
1039 struct tipc_media *m;
1040 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1042 if (!info->attrs[TIPC_NLA_MEDIA])
1045 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
1046 info->attrs[TIPC_NLA_MEDIA],
1047 tipc_nl_media_policy);
1049 if (!attrs[TIPC_NLA_MEDIA_NAME])
1051 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1054 m = tipc_media_find(name);
1060 if (attrs[TIPC_NLA_MEDIA_PROP]) {
1061 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
1063 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP],
1070 if (props[TIPC_NLA_PROP_TOL])
1071 m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
1072 if (props[TIPC_NLA_PROP_PRIO])
1073 m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
1074 if (props[TIPC_NLA_PROP_WIN])
1075 m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);