2 * net/tipc/bearer.c: TIPC bearer code
4 * Copyright (c) 1996-2006, 2013-2016, 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
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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.
46 #define MAX_ADDR_STR 60
48 static struct tipc_media * const media_info_array[] = {
50 #ifdef CONFIG_TIPC_MEDIA_IB
53 #ifdef CONFIG_TIPC_MEDIA_UDP
59 static void bearer_disable(struct net *net, struct tipc_bearer *b);
62 * tipc_media_find - locates specified media object by name
64 struct tipc_media *tipc_media_find(const char *name)
68 for (i = 0; media_info_array[i] != NULL; i++) {
69 if (!strcmp(media_info_array[i]->name, name))
72 return media_info_array[i];
76 * media_find_id - locates specified media object by type identifier
78 static struct tipc_media *media_find_id(u8 type)
82 for (i = 0; media_info_array[i] != NULL; i++) {
83 if (media_info_array[i]->type_id == type)
86 return media_info_array[i];
90 * tipc_media_addr_printf - record media address in print buffer
92 void tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a)
94 char addr_str[MAX_ADDR_STR];
98 m = media_find_id(a->media_id);
100 if (m && !m->addr2str(a, addr_str, sizeof(addr_str)))
101 ret = scnprintf(buf, len, "%s(%s)", m->name, addr_str);
105 ret = scnprintf(buf, len, "UNKNOWN(%u)", a->media_id);
106 for (i = 0; i < sizeof(a->value); i++)
107 ret += scnprintf(buf - ret, len + ret,
108 "-%02x", a->value[i]);
113 * bearer_name_validate - validate & (optionally) deconstruct bearer name
114 * @name: ptr to bearer name string
115 * @name_parts: ptr to area for bearer name components (or NULL if not needed)
117 * Returns 1 if bearer name is valid, otherwise 0.
119 static int bearer_name_validate(const char *name,
120 struct tipc_bearer_names *name_parts)
122 char name_copy[TIPC_MAX_BEARER_NAME];
128 /* copy bearer name & ensure length is OK */
129 name_copy[TIPC_MAX_BEARER_NAME - 1] = 0;
130 /* need above in case non-Posix strncpy() doesn't pad with nulls */
131 strncpy(name_copy, name, TIPC_MAX_BEARER_NAME);
132 if (name_copy[TIPC_MAX_BEARER_NAME - 1] != 0)
135 /* ensure all component parts of bearer name are present */
136 media_name = name_copy;
137 if_name = strchr(media_name, ':');
141 media_len = if_name - media_name;
142 if_len = strlen(if_name) + 1;
144 /* validate component parts of bearer name */
145 if ((media_len <= 1) || (media_len > TIPC_MAX_MEDIA_NAME) ||
146 (if_len <= 1) || (if_len > TIPC_MAX_IF_NAME))
149 /* return bearer name components, if necessary */
151 strcpy(name_parts->media_name, media_name);
152 strcpy(name_parts->if_name, if_name);
158 * tipc_bearer_find - locates bearer object with matching bearer name
160 struct tipc_bearer *tipc_bearer_find(struct net *net, const char *name)
162 struct tipc_net *tn = net_generic(net, tipc_net_id);
163 struct tipc_bearer *b;
166 for (i = 0; i < MAX_BEARERS; i++) {
167 b = rtnl_dereference(tn->bearer_list[i]);
168 if (b && (!strcmp(b->name, name)))
174 /* tipc_bearer_get_name - get the bearer name from its id.
175 * @net: network namespace
176 * @name: a pointer to the buffer where the name will be stored.
177 * @bearer_id: the id to get the name from.
179 int tipc_bearer_get_name(struct net *net, char *name, u32 bearer_id)
181 struct tipc_net *tn = tipc_net(net);
182 struct tipc_bearer *b;
184 if (bearer_id >= MAX_BEARERS)
187 b = rtnl_dereference(tn->bearer_list[bearer_id]);
191 strcpy(name, b->name);
195 void tipc_bearer_add_dest(struct net *net, u32 bearer_id, u32 dest)
197 struct tipc_net *tn = net_generic(net, tipc_net_id);
198 struct tipc_bearer *b;
201 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
203 tipc_disc_add_dest(b->link_req);
207 void tipc_bearer_remove_dest(struct net *net, u32 bearer_id, u32 dest)
209 struct tipc_net *tn = net_generic(net, tipc_net_id);
210 struct tipc_bearer *b;
213 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
215 tipc_disc_remove_dest(b->link_req);
220 * tipc_enable_bearer - enable bearer with the given name
222 static int tipc_enable_bearer(struct net *net, const char *name,
223 u32 disc_domain, u32 priority,
224 struct nlattr *attr[])
226 struct tipc_net *tn = net_generic(net, tipc_net_id);
227 struct tipc_bearer *b;
228 struct tipc_media *m;
229 struct tipc_bearer_names b_names;
231 char addr_string[16];
238 pr_warn("Bearer <%s> rejected, not supported in standalone mode\n",
242 if (!bearer_name_validate(name, &b_names)) {
243 pr_warn("Bearer <%s> rejected, illegal name\n", name);
246 if (tipc_addr_domain_valid(disc_domain) &&
247 (disc_domain != tn->own_addr)) {
248 if (tipc_in_scope(disc_domain, tn->own_addr)) {
249 disc_domain = tn->own_addr & TIPC_ZONE_CLUSTER_MASK;
250 res = 0; /* accept any node in own cluster */
251 } else if (in_own_cluster_exact(net, disc_domain))
252 res = 0; /* accept specified node in own cluster */
255 pr_warn("Bearer <%s> rejected, illegal discovery domain\n",
259 if ((priority > TIPC_MAX_LINK_PRI) &&
260 (priority != TIPC_MEDIA_LINK_PRI)) {
261 pr_warn("Bearer <%s> rejected, illegal priority\n", name);
265 m = tipc_media_find(b_names.media_name);
267 pr_warn("Bearer <%s> rejected, media <%s> not registered\n",
268 name, b_names.media_name);
272 if (priority == TIPC_MEDIA_LINK_PRI)
273 priority = m->priority;
276 bearer_id = MAX_BEARERS;
278 for (i = MAX_BEARERS; i-- != 0; ) {
279 b = rtnl_dereference(tn->bearer_list[i]);
284 if (!strcmp(name, b->name)) {
285 pr_warn("Bearer <%s> rejected, already enabled\n",
289 if ((b->priority == priority) &&
290 (++with_this_prio > 2)) {
291 if (priority-- == 0) {
292 pr_warn("Bearer <%s> rejected, duplicate priority\n",
296 pr_warn("Bearer <%s> priority adjustment required %u->%u\n",
297 name, priority + 1, priority);
301 if (bearer_id >= MAX_BEARERS) {
302 pr_warn("Bearer <%s> rejected, bearer limit reached (%u)\n",
307 b = kzalloc(sizeof(*b), GFP_ATOMIC);
311 strcpy(b->name, name);
313 res = m->enable_media(net, b, attr);
315 pr_warn("Bearer <%s> rejected, enable failure (%d)\n",
320 b->identity = bearer_id;
321 b->tolerance = m->tolerance;
322 b->window = m->window;
323 b->domain = disc_domain;
324 b->net_plane = bearer_id + 'A';
325 b->priority = priority;
327 res = tipc_disc_create(net, b, &b->bcast_addr, &skb);
329 bearer_disable(net, b);
330 pr_warn("Bearer <%s> rejected, discovery object creation failed\n",
335 rcu_assign_pointer(tn->bearer_list[bearer_id], b);
337 tipc_bearer_xmit_skb(net, bearer_id, skb, &b->bcast_addr);
339 if (tipc_mon_create(net, bearer_id))
342 pr_info("Enabled bearer <%s>, discovery domain %s, priority %u\n",
344 tipc_addr_string_fill(addr_string, disc_domain), priority);
349 * tipc_reset_bearer - Reset all links established over this bearer
351 static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b)
353 pr_info("Resetting bearer <%s>\n", b->name);
354 tipc_node_delete_links(net, b->identity);
355 tipc_disc_reset(net, b);
359 /* tipc_bearer_reset_all - reset all links on all bearers
361 void tipc_bearer_reset_all(struct net *net)
363 struct tipc_net *tn = tipc_net(net);
364 struct tipc_bearer *b;
367 for (i = 0; i < MAX_BEARERS; i++) {
368 b = rcu_dereference_rtnl(tn->bearer_list[i]);
370 tipc_reset_bearer(net, b);
377 * Note: This routine assumes caller holds RTNL lock.
379 static void bearer_disable(struct net *net, struct tipc_bearer *b)
381 struct tipc_net *tn = tipc_net(net);
382 int bearer_id = b->identity;
384 pr_info("Disabling bearer <%s>\n", b->name);
385 b->media->disable_media(b);
386 tipc_node_delete_links(net, bearer_id);
387 RCU_INIT_POINTER(b->media_ptr, NULL);
389 tipc_disc_delete(b->link_req);
390 RCU_INIT_POINTER(tn->bearer_list[bearer_id], NULL);
392 tipc_mon_delete(net, bearer_id);
395 int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b,
396 struct nlattr *attr[])
398 struct net_device *dev;
399 char *driver_name = strchr((const char *)b->name, ':') + 1;
401 /* Find device with specified name */
402 dev = dev_get_by_name(net, driver_name);
406 /* Associate TIPC bearer with L2 bearer */
407 rcu_assign_pointer(b->media_ptr, dev);
408 memset(&b->bcast_addr, 0, sizeof(b->bcast_addr));
409 memcpy(b->bcast_addr.value, dev->broadcast, b->media->hwaddr_len);
410 b->bcast_addr.media_id = b->media->type_id;
411 b->bcast_addr.broadcast = 1;
413 b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr);
414 rcu_assign_pointer(dev->tipc_ptr, b);
418 /* tipc_disable_l2_media - detach TIPC bearer from an L2 interface
420 * Mark L2 bearer as inactive so that incoming buffers are thrown away
422 void tipc_disable_l2_media(struct tipc_bearer *b)
424 struct net_device *dev;
426 dev = (struct net_device *)rtnl_dereference(b->media_ptr);
427 RCU_INIT_POINTER(dev->tipc_ptr, NULL);
433 * tipc_l2_send_msg - send a TIPC packet out over an L2 interface
434 * @skb: the packet to be sent
435 * @b: the bearer through which the packet is to be sent
436 * @dest: peer destination address
438 int tipc_l2_send_msg(struct net *net, struct sk_buff *skb,
439 struct tipc_bearer *b, struct tipc_media_addr *dest)
441 struct net_device *dev;
445 dev = (struct net_device *)rcu_dereference_rtnl(b->media_ptr);
449 /* Send RESET message even if bearer is detached from device */
450 tipc_ptr = rcu_dereference_rtnl(dev->tipc_ptr);
451 if (unlikely(!tipc_ptr && !msg_is_reset(buf_msg(skb))))
454 delta = dev->hard_header_len - skb_headroom(skb);
456 pskb_expand_head(skb, SKB_DATA_ALIGN(delta), 0, GFP_ATOMIC))
459 skb_reset_network_header(skb);
461 skb->protocol = htons(ETH_P_TIPC);
462 dev_hard_header(skb, dev, ETH_P_TIPC, dest->value,
463 dev->dev_addr, skb->len);
471 int tipc_bearer_mtu(struct net *net, u32 bearer_id)
474 struct tipc_bearer *b;
477 b = rcu_dereference_rtnl(tipc_net(net)->bearer_list[bearer_id]);
484 /* tipc_bearer_xmit_skb - sends buffer to destination over bearer
486 void tipc_bearer_xmit_skb(struct net *net, u32 bearer_id,
488 struct tipc_media_addr *dest)
490 struct tipc_net *tn = tipc_net(net);
491 struct tipc_bearer *b;
494 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
496 b->media->send_msg(net, skb, b, dest);
502 /* tipc_bearer_xmit() -send buffer to destination over bearer
504 void tipc_bearer_xmit(struct net *net, u32 bearer_id,
505 struct sk_buff_head *xmitq,
506 struct tipc_media_addr *dst)
508 struct tipc_net *tn = net_generic(net, tipc_net_id);
509 struct tipc_bearer *b;
510 struct sk_buff *skb, *tmp;
512 if (skb_queue_empty(xmitq))
516 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
518 __skb_queue_purge(xmitq);
519 skb_queue_walk_safe(xmitq, skb, tmp) {
520 __skb_dequeue(xmitq);
521 b->media->send_msg(net, skb, b, dst);
526 /* tipc_bearer_bc_xmit() - broadcast buffers to all destinations
528 void tipc_bearer_bc_xmit(struct net *net, u32 bearer_id,
529 struct sk_buff_head *xmitq)
531 struct tipc_net *tn = tipc_net(net);
532 int net_id = tn->net_id;
533 struct tipc_bearer *b;
534 struct sk_buff *skb, *tmp;
535 struct tipc_msg *hdr;
538 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
540 __skb_queue_purge(xmitq);
541 skb_queue_walk_safe(xmitq, skb, tmp) {
543 msg_set_non_seq(hdr, 1);
544 msg_set_mc_netid(hdr, net_id);
545 __skb_dequeue(xmitq);
546 b->media->send_msg(net, skb, b, &b->bcast_addr);
552 * tipc_l2_rcv_msg - handle incoming TIPC message from an interface
553 * @buf: the received packet
554 * @dev: the net device that the packet was received on
555 * @pt: the packet_type structure which was used to register this handler
556 * @orig_dev: the original receive net device in case the device is a bond
558 * Accept only packets explicitly sent to this node, or broadcast packets;
559 * ignores packets sent using interface multicast, and traffic sent to other
560 * nodes (which can happen if interface is running in promiscuous mode).
562 static int tipc_l2_rcv_msg(struct sk_buff *skb, struct net_device *dev,
563 struct packet_type *pt, struct net_device *orig_dev)
565 struct tipc_bearer *b;
568 b = rcu_dereference_rtnl(dev->tipc_ptr);
569 if (likely(b && (skb->pkt_type <= PACKET_BROADCAST))) {
571 tipc_rcv(dev_net(dev), skb, b);
573 return NET_RX_SUCCESS;
581 * tipc_l2_device_event - handle device events from network device
582 * @nb: the context of the notification
583 * @evt: the type of event
584 * @ptr: the net device that the event was on
586 * This function is called by the Ethernet driver in case of link
589 static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt,
592 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
593 struct net *net = dev_net(dev);
594 struct tipc_net *tn = tipc_net(net);
595 struct tipc_bearer *b;
598 b = rtnl_dereference(dev->tipc_ptr);
600 for (i = 0; i < MAX_BEARERS; b = NULL, i++) {
601 b = rtnl_dereference(tn->bearer_list[i]);
602 if (b && (b->media_ptr == dev))
613 if (netif_carrier_ok(dev))
616 rcu_assign_pointer(dev->tipc_ptr, b);
618 case NETDEV_GOING_DOWN:
619 RCU_INIT_POINTER(dev->tipc_ptr, NULL);
621 tipc_reset_bearer(net, b);
623 case NETDEV_CHANGEMTU:
624 tipc_reset_bearer(net, b);
626 case NETDEV_CHANGEADDR:
627 b->media->raw2addr(b, &b->addr,
628 (char *)dev->dev_addr);
629 tipc_reset_bearer(net, b);
631 case NETDEV_UNREGISTER:
632 case NETDEV_CHANGENAME:
633 bearer_disable(dev_net(dev), b);
639 static struct packet_type tipc_packet_type __read_mostly = {
640 .type = htons(ETH_P_TIPC),
641 .func = tipc_l2_rcv_msg,
644 static struct notifier_block notifier = {
645 .notifier_call = tipc_l2_device_event,
649 int tipc_bearer_setup(void)
653 err = register_netdevice_notifier(¬ifier);
656 dev_add_pack(&tipc_packet_type);
660 void tipc_bearer_cleanup(void)
662 unregister_netdevice_notifier(¬ifier);
663 dev_remove_pack(&tipc_packet_type);
666 void tipc_bearer_stop(struct net *net)
668 struct tipc_net *tn = net_generic(net, tipc_net_id);
669 struct tipc_bearer *b;
672 for (i = 0; i < MAX_BEARERS; i++) {
673 b = rtnl_dereference(tn->bearer_list[i]);
675 bearer_disable(net, b);
676 tn->bearer_list[i] = NULL;
681 /* Caller should hold rtnl_lock to protect the bearer */
682 static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg,
683 struct tipc_bearer *bearer, int nlflags)
686 struct nlattr *attrs;
689 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
690 nlflags, TIPC_NL_BEARER_GET);
694 attrs = nla_nest_start(msg->skb, TIPC_NLA_BEARER);
698 if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name))
701 prop = nla_nest_start(msg->skb, TIPC_NLA_BEARER_PROP);
704 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority))
706 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance))
708 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window))
711 nla_nest_end(msg->skb, prop);
712 nla_nest_end(msg->skb, attrs);
713 genlmsg_end(msg->skb, hdr);
718 nla_nest_cancel(msg->skb, prop);
720 nla_nest_cancel(msg->skb, attrs);
722 genlmsg_cancel(msg->skb, hdr);
727 int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb)
731 struct tipc_bearer *bearer;
732 struct tipc_nl_msg msg;
733 struct net *net = sock_net(skb->sk);
734 struct tipc_net *tn = net_generic(net, tipc_net_id);
736 if (i == MAX_BEARERS)
740 msg.portid = NETLINK_CB(cb->skb).portid;
741 msg.seq = cb->nlh->nlmsg_seq;
744 for (i = 0; i < MAX_BEARERS; i++) {
745 bearer = rtnl_dereference(tn->bearer_list[i]);
749 err = __tipc_nl_add_bearer(&msg, bearer, NLM_F_MULTI);
759 int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info)
764 struct tipc_bearer *bearer;
765 struct tipc_nl_msg msg;
766 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
767 struct net *net = genl_info_net(info);
769 if (!info->attrs[TIPC_NLA_BEARER])
772 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
773 info->attrs[TIPC_NLA_BEARER],
774 tipc_nl_bearer_policy);
778 if (!attrs[TIPC_NLA_BEARER_NAME])
780 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
782 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
787 msg.portid = info->snd_portid;
788 msg.seq = info->snd_seq;
791 bearer = tipc_bearer_find(net, name);
797 err = __tipc_nl_add_bearer(&msg, bearer, 0);
802 return genlmsg_reply(rep, info);
810 int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info)
814 struct tipc_bearer *bearer;
815 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
816 struct net *net = sock_net(skb->sk);
818 if (!info->attrs[TIPC_NLA_BEARER])
821 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
822 info->attrs[TIPC_NLA_BEARER],
823 tipc_nl_bearer_policy);
827 if (!attrs[TIPC_NLA_BEARER_NAME])
830 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
833 bearer = tipc_bearer_find(net, name);
839 bearer_disable(net, bearer);
845 int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
849 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
850 struct net *net = sock_net(skb->sk);
851 struct tipc_net *tn = net_generic(net, tipc_net_id);
855 prio = TIPC_MEDIA_LINK_PRI;
856 domain = tn->own_addr & TIPC_ZONE_CLUSTER_MASK;
858 if (!info->attrs[TIPC_NLA_BEARER])
861 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
862 info->attrs[TIPC_NLA_BEARER],
863 tipc_nl_bearer_policy);
867 if (!attrs[TIPC_NLA_BEARER_NAME])
870 bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
872 if (attrs[TIPC_NLA_BEARER_DOMAIN])
873 domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]);
875 if (attrs[TIPC_NLA_BEARER_PROP]) {
876 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
878 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
883 if (props[TIPC_NLA_PROP_PRIO])
884 prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
888 err = tipc_enable_bearer(net, bearer, domain, prio, attrs);
898 int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
902 struct tipc_bearer *b;
903 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
904 struct net *net = sock_net(skb->sk);
906 if (!info->attrs[TIPC_NLA_BEARER])
909 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
910 info->attrs[TIPC_NLA_BEARER],
911 tipc_nl_bearer_policy);
915 if (!attrs[TIPC_NLA_BEARER_NAME])
917 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
920 b = tipc_bearer_find(net, name);
926 if (attrs[TIPC_NLA_BEARER_PROP]) {
927 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
929 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
936 if (props[TIPC_NLA_PROP_TOL])
937 b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
938 if (props[TIPC_NLA_PROP_PRIO])
939 b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
940 if (props[TIPC_NLA_PROP_WIN])
941 b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
948 static int __tipc_nl_add_media(struct tipc_nl_msg *msg,
949 struct tipc_media *media, int nlflags)
952 struct nlattr *attrs;
955 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
956 nlflags, TIPC_NL_MEDIA_GET);
960 attrs = nla_nest_start(msg->skb, TIPC_NLA_MEDIA);
964 if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name))
967 prop = nla_nest_start(msg->skb, TIPC_NLA_MEDIA_PROP);
970 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority))
972 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance))
974 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window))
977 nla_nest_end(msg->skb, prop);
978 nla_nest_end(msg->skb, attrs);
979 genlmsg_end(msg->skb, hdr);
984 nla_nest_cancel(msg->skb, prop);
986 nla_nest_cancel(msg->skb, attrs);
988 genlmsg_cancel(msg->skb, hdr);
993 int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb)
997 struct tipc_nl_msg msg;
1003 msg.portid = NETLINK_CB(cb->skb).portid;
1004 msg.seq = cb->nlh->nlmsg_seq;
1007 for (; media_info_array[i] != NULL; i++) {
1008 err = __tipc_nl_add_media(&msg, media_info_array[i],
1019 int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info)
1023 struct tipc_nl_msg msg;
1024 struct tipc_media *media;
1025 struct sk_buff *rep;
1026 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1028 if (!info->attrs[TIPC_NLA_MEDIA])
1031 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
1032 info->attrs[TIPC_NLA_MEDIA],
1033 tipc_nl_media_policy);
1037 if (!attrs[TIPC_NLA_MEDIA_NAME])
1039 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1041 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1046 msg.portid = info->snd_portid;
1047 msg.seq = info->snd_seq;
1050 media = tipc_media_find(name);
1056 err = __tipc_nl_add_media(&msg, media, 0);
1061 return genlmsg_reply(rep, info);
1069 int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
1073 struct tipc_media *m;
1074 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1076 if (!info->attrs[TIPC_NLA_MEDIA])
1079 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
1080 info->attrs[TIPC_NLA_MEDIA],
1081 tipc_nl_media_policy);
1083 if (!attrs[TIPC_NLA_MEDIA_NAME])
1085 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1088 m = tipc_media_find(name);
1094 if (attrs[TIPC_NLA_MEDIA_PROP]) {
1095 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
1097 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP],
1104 if (props[TIPC_NLA_PROP_TOL])
1105 m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
1106 if (props[TIPC_NLA_PROP_PRIO])
1107 m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
1108 if (props[TIPC_NLA_PROP_WIN])
1109 m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);