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
28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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 void tipc_bearer_add_dest(struct net *net, u32 bearer_id, u32 dest)
176 struct tipc_net *tn = net_generic(net, tipc_net_id);
177 struct tipc_bearer *b;
180 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
182 tipc_disc_add_dest(b->link_req);
186 void tipc_bearer_remove_dest(struct net *net, u32 bearer_id, u32 dest)
188 struct tipc_net *tn = net_generic(net, tipc_net_id);
189 struct tipc_bearer *b;
192 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
194 tipc_disc_remove_dest(b->link_req);
199 * tipc_enable_bearer - enable bearer with the given name
201 static int tipc_enable_bearer(struct net *net, const char *name,
202 u32 disc_domain, u32 priority,
203 struct nlattr *attr[])
205 struct tipc_net *tn = net_generic(net, tipc_net_id);
206 struct tipc_bearer *b;
207 struct tipc_media *m;
208 struct tipc_bearer_names b_names;
210 char addr_string[16];
217 pr_warn("Bearer <%s> rejected, not supported in standalone mode\n",
221 if (!bearer_name_validate(name, &b_names)) {
222 pr_warn("Bearer <%s> rejected, illegal name\n", name);
225 if (tipc_addr_domain_valid(disc_domain) &&
226 (disc_domain != tn->own_addr)) {
227 if (tipc_in_scope(disc_domain, tn->own_addr)) {
228 disc_domain = tn->own_addr & TIPC_CLUSTER_MASK;
229 res = 0; /* accept any node in own cluster */
230 } else if (in_own_cluster_exact(net, disc_domain))
231 res = 0; /* accept specified node in own cluster */
234 pr_warn("Bearer <%s> rejected, illegal discovery domain\n",
238 if ((priority > TIPC_MAX_LINK_PRI) &&
239 (priority != TIPC_MEDIA_LINK_PRI)) {
240 pr_warn("Bearer <%s> rejected, illegal priority\n", name);
244 m = tipc_media_find(b_names.media_name);
246 pr_warn("Bearer <%s> rejected, media <%s> not registered\n",
247 name, b_names.media_name);
251 if (priority == TIPC_MEDIA_LINK_PRI)
252 priority = m->priority;
255 bearer_id = MAX_BEARERS;
257 for (i = MAX_BEARERS; i-- != 0; ) {
258 b = rtnl_dereference(tn->bearer_list[i]);
263 if (!strcmp(name, b->name)) {
264 pr_warn("Bearer <%s> rejected, already enabled\n",
268 if ((b->priority == priority) &&
269 (++with_this_prio > 2)) {
270 if (priority-- == 0) {
271 pr_warn("Bearer <%s> rejected, duplicate priority\n",
275 pr_warn("Bearer <%s> priority adjustment required %u->%u\n",
276 name, priority + 1, priority);
280 if (bearer_id >= MAX_BEARERS) {
281 pr_warn("Bearer <%s> rejected, bearer limit reached (%u)\n",
286 b = kzalloc(sizeof(*b), GFP_ATOMIC);
290 strcpy(b->name, name);
292 res = m->enable_media(net, b, attr);
294 pr_warn("Bearer <%s> rejected, enable failure (%d)\n",
299 b->identity = bearer_id;
300 b->tolerance = m->tolerance;
301 b->window = m->window;
302 b->domain = disc_domain;
303 b->net_plane = bearer_id + 'A';
304 b->priority = priority;
306 res = tipc_disc_create(net, b, &b->bcast_addr, &skb);
308 bearer_disable(net, b);
309 pr_warn("Bearer <%s> rejected, discovery object creation failed\n",
314 rcu_assign_pointer(tn->bearer_list[bearer_id], b);
316 tipc_bearer_xmit_skb(net, bearer_id, skb, &b->bcast_addr);
318 if (tipc_mon_create(net, bearer_id))
321 pr_info("Enabled bearer <%s>, discovery domain %s, priority %u\n",
323 tipc_addr_string_fill(addr_string, disc_domain), priority);
328 * tipc_reset_bearer - Reset all links established over this bearer
330 static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b)
332 pr_info("Resetting bearer <%s>\n", b->name);
333 tipc_node_delete_links(net, b->identity);
334 tipc_disc_reset(net, b);
341 * Note: This routine assumes caller holds RTNL lock.
343 static void bearer_disable(struct net *net, struct tipc_bearer *b)
345 struct tipc_net *tn = tipc_net(net);
346 int bearer_id = b->identity;
348 pr_info("Disabling bearer <%s>\n", b->name);
349 b->media->disable_media(b);
350 tipc_node_delete_links(net, bearer_id);
351 RCU_INIT_POINTER(b->media_ptr, NULL);
353 tipc_disc_delete(b->link_req);
354 RCU_INIT_POINTER(tn->bearer_list[bearer_id], NULL);
356 tipc_mon_delete(net, bearer_id);
359 int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b,
360 struct nlattr *attr[])
362 struct net_device *dev;
363 char *driver_name = strchr((const char *)b->name, ':') + 1;
365 /* Find device with specified name */
366 dev = dev_get_by_name(net, driver_name);
370 /* Associate TIPC bearer with L2 bearer */
371 rcu_assign_pointer(b->media_ptr, dev);
372 memset(&b->bcast_addr, 0, sizeof(b->bcast_addr));
373 memcpy(b->bcast_addr.value, dev->broadcast, b->media->hwaddr_len);
374 b->bcast_addr.media_id = b->media->type_id;
375 b->bcast_addr.broadcast = 1;
377 b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr);
378 rcu_assign_pointer(dev->tipc_ptr, b);
382 /* tipc_disable_l2_media - detach TIPC bearer from an L2 interface
384 * Mark L2 bearer as inactive so that incoming buffers are thrown away
386 void tipc_disable_l2_media(struct tipc_bearer *b)
388 struct net_device *dev;
390 dev = (struct net_device *)rtnl_dereference(b->media_ptr);
391 RCU_INIT_POINTER(dev->tipc_ptr, NULL);
397 * tipc_l2_send_msg - send a TIPC packet out over an L2 interface
398 * @skb: the packet to be sent
399 * @b: the bearer through which the packet is to be sent
400 * @dest: peer destination address
402 int tipc_l2_send_msg(struct net *net, struct sk_buff *skb,
403 struct tipc_bearer *b, struct tipc_media_addr *dest)
405 struct net_device *dev;
409 dev = (struct net_device *)rcu_dereference_rtnl(b->media_ptr);
413 /* Send RESET message even if bearer is detached from device */
414 tipc_ptr = rtnl_dereference(dev->tipc_ptr);
415 if (unlikely(!tipc_ptr && !msg_is_reset(buf_msg(skb))))
418 delta = dev->hard_header_len - skb_headroom(skb);
420 pskb_expand_head(skb, SKB_DATA_ALIGN(delta), 0, GFP_ATOMIC))
423 skb_reset_network_header(skb);
425 skb->protocol = htons(ETH_P_TIPC);
426 dev_hard_header(skb, dev, ETH_P_TIPC, dest->value,
427 dev->dev_addr, skb->len);
435 int tipc_bearer_mtu(struct net *net, u32 bearer_id)
438 struct tipc_bearer *b;
441 b = rcu_dereference_rtnl(tipc_net(net)->bearer_list[bearer_id]);
448 /* tipc_bearer_xmit_skb - sends buffer to destination over bearer
450 void tipc_bearer_xmit_skb(struct net *net, u32 bearer_id,
452 struct tipc_media_addr *dest)
454 struct tipc_net *tn = tipc_net(net);
455 struct tipc_bearer *b;
458 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
460 b->media->send_msg(net, skb, b, dest);
466 /* tipc_bearer_xmit() -send buffer to destination over bearer
468 void tipc_bearer_xmit(struct net *net, u32 bearer_id,
469 struct sk_buff_head *xmitq,
470 struct tipc_media_addr *dst)
472 struct tipc_net *tn = net_generic(net, tipc_net_id);
473 struct tipc_bearer *b;
474 struct sk_buff *skb, *tmp;
476 if (skb_queue_empty(xmitq))
480 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
482 __skb_queue_purge(xmitq);
483 skb_queue_walk_safe(xmitq, skb, tmp) {
484 __skb_dequeue(xmitq);
485 b->media->send_msg(net, skb, b, dst);
490 /* tipc_bearer_bc_xmit() - broadcast buffers to all destinations
492 void tipc_bearer_bc_xmit(struct net *net, u32 bearer_id,
493 struct sk_buff_head *xmitq)
495 struct tipc_net *tn = tipc_net(net);
496 int net_id = tn->net_id;
497 struct tipc_bearer *b;
498 struct sk_buff *skb, *tmp;
499 struct tipc_msg *hdr;
502 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
504 __skb_queue_purge(xmitq);
505 skb_queue_walk_safe(xmitq, skb, tmp) {
507 msg_set_non_seq(hdr, 1);
508 msg_set_mc_netid(hdr, net_id);
509 __skb_dequeue(xmitq);
510 b->media->send_msg(net, skb, b, &b->bcast_addr);
516 * tipc_l2_rcv_msg - handle incoming TIPC message from an interface
517 * @buf: the received packet
518 * @dev: the net device that the packet was received on
519 * @pt: the packet_type structure which was used to register this handler
520 * @orig_dev: the original receive net device in case the device is a bond
522 * Accept only packets explicitly sent to this node, or broadcast packets;
523 * ignores packets sent using interface multicast, and traffic sent to other
524 * nodes (which can happen if interface is running in promiscuous mode).
526 static int tipc_l2_rcv_msg(struct sk_buff *skb, struct net_device *dev,
527 struct packet_type *pt, struct net_device *orig_dev)
529 struct tipc_bearer *b;
532 b = rcu_dereference_rtnl(dev->tipc_ptr);
533 if (likely(b && (skb->pkt_type <= PACKET_BROADCAST))) {
535 tipc_rcv(dev_net(dev), skb, b);
537 return NET_RX_SUCCESS;
545 * tipc_l2_device_event - handle device events from network device
546 * @nb: the context of the notification
547 * @evt: the type of event
548 * @ptr: the net device that the event was on
550 * This function is called by the Ethernet driver in case of link
553 static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt,
556 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
557 struct net *net = dev_net(dev);
558 struct tipc_net *tn = tipc_net(net);
559 struct tipc_bearer *b;
562 b = rtnl_dereference(dev->tipc_ptr);
564 for (i = 0; i < MAX_BEARERS; b = NULL, i++) {
565 b = rtnl_dereference(tn->bearer_list[i]);
566 if (b && (b->media_ptr == dev))
577 if (netif_carrier_ok(dev))
580 rcu_assign_pointer(dev->tipc_ptr, b);
582 case NETDEV_GOING_DOWN:
583 RCU_INIT_POINTER(dev->tipc_ptr, NULL);
585 tipc_reset_bearer(net, b);
587 case NETDEV_CHANGEMTU:
588 tipc_reset_bearer(net, b);
590 case NETDEV_CHANGEADDR:
591 b->media->raw2addr(b, &b->addr,
592 (char *)dev->dev_addr);
593 tipc_reset_bearer(net, b);
595 case NETDEV_UNREGISTER:
596 case NETDEV_CHANGENAME:
597 bearer_disable(dev_net(dev), b);
603 static struct packet_type tipc_packet_type __read_mostly = {
604 .type = htons(ETH_P_TIPC),
605 .func = tipc_l2_rcv_msg,
608 static struct notifier_block notifier = {
609 .notifier_call = tipc_l2_device_event,
613 int tipc_bearer_setup(void)
617 err = register_netdevice_notifier(¬ifier);
620 dev_add_pack(&tipc_packet_type);
624 void tipc_bearer_cleanup(void)
626 unregister_netdevice_notifier(¬ifier);
627 dev_remove_pack(&tipc_packet_type);
630 void tipc_bearer_stop(struct net *net)
632 struct tipc_net *tn = net_generic(net, tipc_net_id);
633 struct tipc_bearer *b;
636 for (i = 0; i < MAX_BEARERS; i++) {
637 b = rtnl_dereference(tn->bearer_list[i]);
639 bearer_disable(net, b);
640 tn->bearer_list[i] = NULL;
645 /* Caller should hold rtnl_lock to protect the bearer */
646 static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg,
647 struct tipc_bearer *bearer, int nlflags)
650 struct nlattr *attrs;
653 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
654 nlflags, TIPC_NL_BEARER_GET);
658 attrs = nla_nest_start(msg->skb, TIPC_NLA_BEARER);
662 if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name))
665 prop = nla_nest_start(msg->skb, TIPC_NLA_BEARER_PROP);
668 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority))
670 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance))
672 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window))
675 nla_nest_end(msg->skb, prop);
676 nla_nest_end(msg->skb, attrs);
677 genlmsg_end(msg->skb, hdr);
682 nla_nest_cancel(msg->skb, prop);
684 nla_nest_cancel(msg->skb, attrs);
686 genlmsg_cancel(msg->skb, hdr);
691 int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb)
695 struct tipc_bearer *bearer;
696 struct tipc_nl_msg msg;
697 struct net *net = sock_net(skb->sk);
698 struct tipc_net *tn = net_generic(net, tipc_net_id);
700 if (i == MAX_BEARERS)
704 msg.portid = NETLINK_CB(cb->skb).portid;
705 msg.seq = cb->nlh->nlmsg_seq;
708 for (i = 0; i < MAX_BEARERS; i++) {
709 bearer = rtnl_dereference(tn->bearer_list[i]);
713 err = __tipc_nl_add_bearer(&msg, bearer, NLM_F_MULTI);
723 int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info)
728 struct tipc_bearer *bearer;
729 struct tipc_nl_msg msg;
730 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
731 struct net *net = genl_info_net(info);
733 if (!info->attrs[TIPC_NLA_BEARER])
736 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
737 info->attrs[TIPC_NLA_BEARER],
738 tipc_nl_bearer_policy);
742 if (!attrs[TIPC_NLA_BEARER_NAME])
744 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
746 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
751 msg.portid = info->snd_portid;
752 msg.seq = info->snd_seq;
755 bearer = tipc_bearer_find(net, name);
761 err = __tipc_nl_add_bearer(&msg, bearer, 0);
766 return genlmsg_reply(rep, info);
774 int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info)
778 struct tipc_bearer *bearer;
779 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
780 struct net *net = sock_net(skb->sk);
782 if (!info->attrs[TIPC_NLA_BEARER])
785 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
786 info->attrs[TIPC_NLA_BEARER],
787 tipc_nl_bearer_policy);
791 if (!attrs[TIPC_NLA_BEARER_NAME])
794 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
797 bearer = tipc_bearer_find(net, name);
803 bearer_disable(net, bearer);
809 int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
813 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
814 struct net *net = sock_net(skb->sk);
815 struct tipc_net *tn = net_generic(net, tipc_net_id);
819 prio = TIPC_MEDIA_LINK_PRI;
820 domain = tn->own_addr & TIPC_CLUSTER_MASK;
822 if (!info->attrs[TIPC_NLA_BEARER])
825 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
826 info->attrs[TIPC_NLA_BEARER],
827 tipc_nl_bearer_policy);
831 if (!attrs[TIPC_NLA_BEARER_NAME])
834 bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
836 if (attrs[TIPC_NLA_BEARER_DOMAIN])
837 domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]);
839 if (attrs[TIPC_NLA_BEARER_PROP]) {
840 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
842 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
847 if (props[TIPC_NLA_PROP_PRIO])
848 prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
852 err = tipc_enable_bearer(net, bearer, domain, prio, attrs);
862 int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
866 struct tipc_bearer *b;
867 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
868 struct net *net = sock_net(skb->sk);
870 if (!info->attrs[TIPC_NLA_BEARER])
873 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
874 info->attrs[TIPC_NLA_BEARER],
875 tipc_nl_bearer_policy);
879 if (!attrs[TIPC_NLA_BEARER_NAME])
881 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
884 b = tipc_bearer_find(net, name);
890 if (attrs[TIPC_NLA_BEARER_PROP]) {
891 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
893 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
900 if (props[TIPC_NLA_PROP_TOL])
901 b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
902 if (props[TIPC_NLA_PROP_PRIO])
903 b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
904 if (props[TIPC_NLA_PROP_WIN])
905 b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
912 static int __tipc_nl_add_media(struct tipc_nl_msg *msg,
913 struct tipc_media *media, int nlflags)
916 struct nlattr *attrs;
919 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
920 nlflags, TIPC_NL_MEDIA_GET);
924 attrs = nla_nest_start(msg->skb, TIPC_NLA_MEDIA);
928 if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name))
931 prop = nla_nest_start(msg->skb, TIPC_NLA_MEDIA_PROP);
934 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority))
936 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance))
938 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window))
941 nla_nest_end(msg->skb, prop);
942 nla_nest_end(msg->skb, attrs);
943 genlmsg_end(msg->skb, hdr);
948 nla_nest_cancel(msg->skb, prop);
950 nla_nest_cancel(msg->skb, attrs);
952 genlmsg_cancel(msg->skb, hdr);
957 int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb)
961 struct tipc_nl_msg msg;
967 msg.portid = NETLINK_CB(cb->skb).portid;
968 msg.seq = cb->nlh->nlmsg_seq;
971 for (; media_info_array[i] != NULL; i++) {
972 err = __tipc_nl_add_media(&msg, media_info_array[i],
983 int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info)
987 struct tipc_nl_msg msg;
988 struct tipc_media *media;
990 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
992 if (!info->attrs[TIPC_NLA_MEDIA])
995 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
996 info->attrs[TIPC_NLA_MEDIA],
997 tipc_nl_media_policy);
1001 if (!attrs[TIPC_NLA_MEDIA_NAME])
1003 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1005 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1010 msg.portid = info->snd_portid;
1011 msg.seq = info->snd_seq;
1014 media = tipc_media_find(name);
1020 err = __tipc_nl_add_media(&msg, media, 0);
1025 return genlmsg_reply(rep, info);
1033 int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
1037 struct tipc_media *m;
1038 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1040 if (!info->attrs[TIPC_NLA_MEDIA])
1043 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
1044 info->attrs[TIPC_NLA_MEDIA],
1045 tipc_nl_media_policy);
1047 if (!attrs[TIPC_NLA_MEDIA_NAME])
1049 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1052 m = tipc_media_find(name);
1058 if (attrs[TIPC_NLA_MEDIA_PROP]) {
1059 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
1061 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP],
1068 if (props[TIPC_NLA_PROP_TOL])
1069 m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
1070 if (props[TIPC_NLA_PROP_PRIO])
1071 m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
1072 if (props[TIPC_NLA_PROP_WIN])
1073 m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);