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.
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;
209 char addr_string[16];
216 pr_warn("Bearer <%s> rejected, not supported in standalone mode\n",
220 if (!bearer_name_validate(name, &b_names)) {
221 pr_warn("Bearer <%s> rejected, illegal name\n", name);
224 if (tipc_addr_domain_valid(disc_domain) &&
225 (disc_domain != tn->own_addr)) {
226 if (tipc_in_scope(disc_domain, tn->own_addr)) {
227 disc_domain = tn->own_addr & TIPC_CLUSTER_MASK;
228 res = 0; /* accept any node in own cluster */
229 } else if (in_own_cluster_exact(net, disc_domain))
230 res = 0; /* accept specified node in own cluster */
233 pr_warn("Bearer <%s> rejected, illegal discovery domain\n",
237 if ((priority > TIPC_MAX_LINK_PRI) &&
238 (priority != TIPC_MEDIA_LINK_PRI)) {
239 pr_warn("Bearer <%s> rejected, illegal priority\n", name);
243 m = tipc_media_find(b_names.media_name);
245 pr_warn("Bearer <%s> rejected, media <%s> not registered\n",
246 name, b_names.media_name);
250 if (priority == TIPC_MEDIA_LINK_PRI)
251 priority = m->priority;
254 bearer_id = MAX_BEARERS;
256 for (i = MAX_BEARERS; i-- != 0; ) {
257 b = rtnl_dereference(tn->bearer_list[i]);
262 if (!strcmp(name, b->name)) {
263 pr_warn("Bearer <%s> rejected, already enabled\n",
267 if ((b->priority == priority) &&
268 (++with_this_prio > 2)) {
269 if (priority-- == 0) {
270 pr_warn("Bearer <%s> rejected, duplicate priority\n",
274 pr_warn("Bearer <%s> priority adjustment required %u->%u\n",
275 name, priority + 1, priority);
279 if (bearer_id >= MAX_BEARERS) {
280 pr_warn("Bearer <%s> rejected, bearer limit reached (%u)\n",
285 b = kzalloc(sizeof(*b), GFP_ATOMIC);
289 strcpy(b->name, name);
291 res = m->enable_media(net, b, attr);
293 pr_warn("Bearer <%s> rejected, enable failure (%d)\n",
298 b->identity = bearer_id;
299 b->tolerance = m->tolerance;
300 b->window = m->window;
301 b->domain = disc_domain;
302 b->net_plane = bearer_id + 'A';
303 b->priority = priority;
305 res = tipc_disc_create(net, b, &b->bcast_addr, &skb);
307 bearer_disable(net, b);
308 pr_warn("Bearer <%s> rejected, discovery object creation failed\n",
313 rcu_assign_pointer(tn->bearer_list[bearer_id], b);
315 tipc_bearer_xmit_skb(net, bearer_id, skb, &b->bcast_addr);
316 pr_info("Enabled bearer <%s>, discovery domain %s, priority %u\n",
318 tipc_addr_string_fill(addr_string, disc_domain), priority);
323 * tipc_reset_bearer - Reset all links established over this bearer
325 static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b)
327 pr_info("Resetting bearer <%s>\n", b->name);
328 tipc_node_delete_links(net, b->identity);
329 tipc_disc_reset(net, b);
336 * Note: This routine assumes caller holds RTNL lock.
338 static void bearer_disable(struct net *net, struct tipc_bearer *b)
340 struct tipc_net *tn = net_generic(net, tipc_net_id);
343 pr_info("Disabling bearer <%s>\n", b->name);
344 b->media->disable_media(b);
346 tipc_node_delete_links(net, b->identity);
347 RCU_INIT_POINTER(b->media_ptr, NULL);
349 tipc_disc_delete(b->link_req);
351 for (i = 0; i < MAX_BEARERS; i++) {
352 if (b == rtnl_dereference(tn->bearer_list[i])) {
353 RCU_INIT_POINTER(tn->bearer_list[i], NULL);
360 int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b,
361 struct nlattr *attr[])
363 struct net_device *dev;
364 char *driver_name = strchr((const char *)b->name, ':') + 1;
366 /* Find device with specified name */
367 dev = dev_get_by_name(net, driver_name);
371 /* Associate TIPC bearer with L2 bearer */
372 rcu_assign_pointer(b->media_ptr, dev);
373 memset(&b->bcast_addr, 0, sizeof(b->bcast_addr));
374 memcpy(b->bcast_addr.value, dev->broadcast, b->media->hwaddr_len);
375 b->bcast_addr.media_id = b->media->type_id;
376 b->bcast_addr.broadcast = 1;
378 b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr);
379 rcu_assign_pointer(dev->tipc_ptr, b);
383 /* tipc_disable_l2_media - detach TIPC bearer from an L2 interface
385 * Mark L2 bearer as inactive so that incoming buffers are thrown away
387 void tipc_disable_l2_media(struct tipc_bearer *b)
389 struct net_device *dev;
391 dev = (struct net_device *)rtnl_dereference(b->media_ptr);
392 RCU_INIT_POINTER(dev->tipc_ptr, NULL);
398 * tipc_l2_send_msg - send a TIPC packet out over an L2 interface
399 * @buf: the packet to be sent
400 * @b: the bearer through which the packet is to be sent
401 * @dest: peer destination address
403 int tipc_l2_send_msg(struct net *net, struct sk_buff *skb,
404 struct tipc_bearer *b, struct tipc_media_addr *dest)
406 struct net_device *dev;
409 dev = (struct net_device *)rcu_dereference_rtnl(b->media_ptr);
413 delta = dev->hard_header_len - skb_headroom(skb);
415 pskb_expand_head(skb, SKB_DATA_ALIGN(delta), 0, GFP_ATOMIC)) {
420 skb_reset_network_header(skb);
422 skb->protocol = htons(ETH_P_TIPC);
423 dev_hard_header(skb, dev, ETH_P_TIPC, dest->value,
424 dev->dev_addr, skb->len);
429 int tipc_bearer_mtu(struct net *net, u32 bearer_id)
432 struct tipc_bearer *b;
435 b = rcu_dereference_rtnl(tipc_net(net)->bearer_list[bearer_id]);
442 /* tipc_bearer_xmit_skb - sends buffer to destination over bearer
444 void tipc_bearer_xmit_skb(struct net *net, u32 bearer_id,
446 struct tipc_media_addr *dest)
448 struct tipc_net *tn = tipc_net(net);
449 struct tipc_bearer *b;
452 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
454 b->media->send_msg(net, skb, b, dest);
460 /* tipc_bearer_xmit() -send buffer to destination over bearer
462 void tipc_bearer_xmit(struct net *net, u32 bearer_id,
463 struct sk_buff_head *xmitq,
464 struct tipc_media_addr *dst)
466 struct tipc_net *tn = net_generic(net, tipc_net_id);
467 struct tipc_bearer *b;
468 struct sk_buff *skb, *tmp;
470 if (skb_queue_empty(xmitq))
474 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
476 __skb_queue_purge(xmitq);
477 skb_queue_walk_safe(xmitq, skb, tmp) {
478 __skb_dequeue(xmitq);
479 b->media->send_msg(net, skb, b, dst);
484 /* tipc_bearer_bc_xmit() - broadcast buffers to all destinations
486 void tipc_bearer_bc_xmit(struct net *net, u32 bearer_id,
487 struct sk_buff_head *xmitq)
489 struct tipc_net *tn = tipc_net(net);
490 int net_id = tn->net_id;
491 struct tipc_bearer *b;
492 struct sk_buff *skb, *tmp;
493 struct tipc_msg *hdr;
496 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
498 __skb_queue_purge(xmitq);
499 skb_queue_walk_safe(xmitq, skb, tmp) {
501 msg_set_non_seq(hdr, 1);
502 msg_set_mc_netid(hdr, net_id);
503 __skb_dequeue(xmitq);
504 b->media->send_msg(net, skb, b, &b->bcast_addr);
510 * tipc_l2_rcv_msg - handle incoming TIPC message from an interface
511 * @buf: the received packet
512 * @dev: the net device that the packet was received on
513 * @pt: the packet_type structure which was used to register this handler
514 * @orig_dev: the original receive net device in case the device is a bond
516 * Accept only packets explicitly sent to this node, or broadcast packets;
517 * ignores packets sent using interface multicast, and traffic sent to other
518 * nodes (which can happen if interface is running in promiscuous mode).
520 static int tipc_l2_rcv_msg(struct sk_buff *skb, struct net_device *dev,
521 struct packet_type *pt, struct net_device *orig_dev)
523 struct tipc_bearer *b;
526 b = rcu_dereference_rtnl(dev->tipc_ptr);
527 if (likely(b && (skb->pkt_type <= PACKET_BROADCAST))) {
529 tipc_rcv(dev_net(dev), skb, b);
531 return NET_RX_SUCCESS;
539 * tipc_l2_device_event - handle device events from network device
540 * @nb: the context of the notification
541 * @evt: the type of event
542 * @ptr: the net device that the event was on
544 * This function is called by the Ethernet driver in case of link
547 static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt,
550 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
551 struct net *net = dev_net(dev);
552 struct tipc_bearer *b;
554 b = rtnl_dereference(dev->tipc_ptr);
562 if (netif_carrier_ok(dev))
564 case NETDEV_GOING_DOWN:
565 case NETDEV_CHANGEMTU:
566 tipc_reset_bearer(net, b);
568 case NETDEV_CHANGEADDR:
569 b->media->raw2addr(b, &b->addr,
570 (char *)dev->dev_addr);
571 tipc_reset_bearer(net, b);
573 case NETDEV_UNREGISTER:
574 case NETDEV_CHANGENAME:
575 bearer_disable(dev_net(dev), b);
581 static struct packet_type tipc_packet_type __read_mostly = {
582 .type = htons(ETH_P_TIPC),
583 .func = tipc_l2_rcv_msg,
586 static struct notifier_block notifier = {
587 .notifier_call = tipc_l2_device_event,
591 int tipc_bearer_setup(void)
595 err = register_netdevice_notifier(¬ifier);
598 dev_add_pack(&tipc_packet_type);
602 void tipc_bearer_cleanup(void)
604 unregister_netdevice_notifier(¬ifier);
605 dev_remove_pack(&tipc_packet_type);
608 void tipc_bearer_stop(struct net *net)
610 struct tipc_net *tn = net_generic(net, tipc_net_id);
611 struct tipc_bearer *b;
614 for (i = 0; i < MAX_BEARERS; i++) {
615 b = rtnl_dereference(tn->bearer_list[i]);
617 bearer_disable(net, b);
618 tn->bearer_list[i] = NULL;
623 /* Caller should hold rtnl_lock to protect the bearer */
624 static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg,
625 struct tipc_bearer *bearer, int nlflags)
628 struct nlattr *attrs;
631 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
632 nlflags, TIPC_NL_BEARER_GET);
636 attrs = nla_nest_start(msg->skb, TIPC_NLA_BEARER);
640 if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name))
643 prop = nla_nest_start(msg->skb, TIPC_NLA_BEARER_PROP);
646 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority))
648 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance))
650 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window))
653 nla_nest_end(msg->skb, prop);
654 nla_nest_end(msg->skb, attrs);
655 genlmsg_end(msg->skb, hdr);
660 nla_nest_cancel(msg->skb, prop);
662 nla_nest_cancel(msg->skb, attrs);
664 genlmsg_cancel(msg->skb, hdr);
669 int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb)
673 struct tipc_bearer *bearer;
674 struct tipc_nl_msg msg;
675 struct net *net = sock_net(skb->sk);
676 struct tipc_net *tn = net_generic(net, tipc_net_id);
678 if (i == MAX_BEARERS)
682 msg.portid = NETLINK_CB(cb->skb).portid;
683 msg.seq = cb->nlh->nlmsg_seq;
686 for (i = 0; i < MAX_BEARERS; i++) {
687 bearer = rtnl_dereference(tn->bearer_list[i]);
691 err = __tipc_nl_add_bearer(&msg, bearer, NLM_F_MULTI);
701 int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info)
706 struct tipc_bearer *bearer;
707 struct tipc_nl_msg msg;
708 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
709 struct net *net = genl_info_net(info);
711 if (!info->attrs[TIPC_NLA_BEARER])
714 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
715 info->attrs[TIPC_NLA_BEARER],
716 tipc_nl_bearer_policy);
720 if (!attrs[TIPC_NLA_BEARER_NAME])
722 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
724 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
729 msg.portid = info->snd_portid;
730 msg.seq = info->snd_seq;
733 bearer = tipc_bearer_find(net, name);
739 err = __tipc_nl_add_bearer(&msg, bearer, 0);
744 return genlmsg_reply(rep, info);
752 int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info)
756 struct tipc_bearer *bearer;
757 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
758 struct net *net = sock_net(skb->sk);
760 if (!info->attrs[TIPC_NLA_BEARER])
763 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
764 info->attrs[TIPC_NLA_BEARER],
765 tipc_nl_bearer_policy);
769 if (!attrs[TIPC_NLA_BEARER_NAME])
772 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
775 bearer = tipc_bearer_find(net, name);
781 bearer_disable(net, bearer);
787 int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
791 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
792 struct net *net = sock_net(skb->sk);
793 struct tipc_net *tn = net_generic(net, tipc_net_id);
797 prio = TIPC_MEDIA_LINK_PRI;
798 domain = tn->own_addr & TIPC_CLUSTER_MASK;
800 if (!info->attrs[TIPC_NLA_BEARER])
803 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
804 info->attrs[TIPC_NLA_BEARER],
805 tipc_nl_bearer_policy);
809 if (!attrs[TIPC_NLA_BEARER_NAME])
812 bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
814 if (attrs[TIPC_NLA_BEARER_DOMAIN])
815 domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]);
817 if (attrs[TIPC_NLA_BEARER_PROP]) {
818 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
820 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
825 if (props[TIPC_NLA_PROP_PRIO])
826 prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
830 err = tipc_enable_bearer(net, bearer, domain, prio, attrs);
840 int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
844 struct tipc_bearer *b;
845 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
846 struct net *net = sock_net(skb->sk);
848 if (!info->attrs[TIPC_NLA_BEARER])
851 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
852 info->attrs[TIPC_NLA_BEARER],
853 tipc_nl_bearer_policy);
857 if (!attrs[TIPC_NLA_BEARER_NAME])
859 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
862 b = tipc_bearer_find(net, name);
868 if (attrs[TIPC_NLA_BEARER_PROP]) {
869 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
871 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
878 if (props[TIPC_NLA_PROP_TOL])
879 b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
880 if (props[TIPC_NLA_PROP_PRIO])
881 b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
882 if (props[TIPC_NLA_PROP_WIN])
883 b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
890 static int __tipc_nl_add_media(struct tipc_nl_msg *msg,
891 struct tipc_media *media, int nlflags)
894 struct nlattr *attrs;
897 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
898 nlflags, TIPC_NL_MEDIA_GET);
902 attrs = nla_nest_start(msg->skb, TIPC_NLA_MEDIA);
906 if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name))
909 prop = nla_nest_start(msg->skb, TIPC_NLA_MEDIA_PROP);
912 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority))
914 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance))
916 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window))
919 nla_nest_end(msg->skb, prop);
920 nla_nest_end(msg->skb, attrs);
921 genlmsg_end(msg->skb, hdr);
926 nla_nest_cancel(msg->skb, prop);
928 nla_nest_cancel(msg->skb, attrs);
930 genlmsg_cancel(msg->skb, hdr);
935 int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb)
939 struct tipc_nl_msg msg;
945 msg.portid = NETLINK_CB(cb->skb).portid;
946 msg.seq = cb->nlh->nlmsg_seq;
949 for (; media_info_array[i] != NULL; i++) {
950 err = __tipc_nl_add_media(&msg, media_info_array[i],
961 int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info)
965 struct tipc_nl_msg msg;
966 struct tipc_media *media;
968 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
970 if (!info->attrs[TIPC_NLA_MEDIA])
973 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
974 info->attrs[TIPC_NLA_MEDIA],
975 tipc_nl_media_policy);
979 if (!attrs[TIPC_NLA_MEDIA_NAME])
981 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
983 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
988 msg.portid = info->snd_portid;
989 msg.seq = info->snd_seq;
992 media = tipc_media_find(name);
998 err = __tipc_nl_add_media(&msg, media, 0);
1003 return genlmsg_reply(rep, info);
1011 int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
1015 struct tipc_media *m;
1016 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1018 if (!info->attrs[TIPC_NLA_MEDIA])
1021 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
1022 info->attrs[TIPC_NLA_MEDIA],
1023 tipc_nl_media_policy);
1025 if (!attrs[TIPC_NLA_MEDIA_NAME])
1027 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1030 m = tipc_media_find(name);
1036 if (attrs[TIPC_NLA_MEDIA_PROP]) {
1037 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
1039 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP],
1046 if (props[TIPC_NLA_PROP_TOL])
1047 m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
1048 if (props[TIPC_NLA_PROP_PRIO])
1049 m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
1050 if (props[TIPC_NLA_PROP_WIN])
1051 m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);