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
55 static const struct nla_policy
56 tipc_nl_bearer_policy[TIPC_NLA_BEARER_MAX + 1] = {
57 [TIPC_NLA_BEARER_UNSPEC] = { .type = NLA_UNSPEC },
58 [TIPC_NLA_BEARER_NAME] = {
60 .len = TIPC_MAX_BEARER_NAME
62 [TIPC_NLA_BEARER_PROP] = { .type = NLA_NESTED },
63 [TIPC_NLA_BEARER_DOMAIN] = { .type = NLA_U32 }
66 static const struct nla_policy tipc_nl_media_policy[TIPC_NLA_MEDIA_MAX + 1] = {
67 [TIPC_NLA_MEDIA_UNSPEC] = { .type = NLA_UNSPEC },
68 [TIPC_NLA_MEDIA_NAME] = { .type = NLA_STRING },
69 [TIPC_NLA_MEDIA_PROP] = { .type = NLA_NESTED }
72 static void bearer_disable(struct net *net, struct tipc_bearer *b_ptr,
76 * tipc_media_find - locates specified media object by name
78 struct tipc_media *tipc_media_find(const char *name)
82 for (i = 0; media_info_array[i] != NULL; i++) {
83 if (!strcmp(media_info_array[i]->name, name))
86 return media_info_array[i];
90 * media_find_id - locates specified media object by type identifier
92 static struct tipc_media *media_find_id(u8 type)
96 for (i = 0; media_info_array[i] != NULL; i++) {
97 if (media_info_array[i]->type_id == type)
100 return media_info_array[i];
104 * tipc_media_addr_printf - record media address in print buffer
106 void tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a)
108 char addr_str[MAX_ADDR_STR];
109 struct tipc_media *m_ptr;
112 m_ptr = media_find_id(a->media_id);
114 if (m_ptr && !m_ptr->addr2str(a, addr_str, sizeof(addr_str)))
115 ret = tipc_snprintf(buf, len, "%s(%s)", m_ptr->name, addr_str);
119 ret = tipc_snprintf(buf, len, "UNKNOWN(%u)", a->media_id);
120 for (i = 0; i < sizeof(a->value); i++)
121 ret += tipc_snprintf(buf - ret, len + ret,
122 "-%02x", a->value[i]);
127 * tipc_media_get_names - record names of registered media in buffer
129 struct sk_buff *tipc_media_get_names(void)
134 buf = tipc_cfg_reply_alloc(MAX_MEDIA * TLV_SPACE(TIPC_MAX_MEDIA_NAME));
138 for (i = 0; media_info_array[i] != NULL; i++) {
139 tipc_cfg_append_tlv(buf, TIPC_TLV_MEDIA_NAME,
140 media_info_array[i]->name,
141 strlen(media_info_array[i]->name) + 1);
147 * bearer_name_validate - validate & (optionally) deconstruct bearer name
148 * @name: ptr to bearer name string
149 * @name_parts: ptr to area for bearer name components (or NULL if not needed)
151 * Returns 1 if bearer name is valid, otherwise 0.
153 static int bearer_name_validate(const char *name,
154 struct tipc_bearer_names *name_parts)
156 char name_copy[TIPC_MAX_BEARER_NAME];
162 /* copy bearer name & ensure length is OK */
163 name_copy[TIPC_MAX_BEARER_NAME - 1] = 0;
164 /* need above in case non-Posix strncpy() doesn't pad with nulls */
165 strncpy(name_copy, name, TIPC_MAX_BEARER_NAME);
166 if (name_copy[TIPC_MAX_BEARER_NAME - 1] != 0)
169 /* ensure all component parts of bearer name are present */
170 media_name = name_copy;
171 if_name = strchr(media_name, ':');
175 media_len = if_name - media_name;
176 if_len = strlen(if_name) + 1;
178 /* validate component parts of bearer name */
179 if ((media_len <= 1) || (media_len > TIPC_MAX_MEDIA_NAME) ||
180 (if_len <= 1) || (if_len > TIPC_MAX_IF_NAME))
183 /* return bearer name components, if necessary */
185 strcpy(name_parts->media_name, media_name);
186 strcpy(name_parts->if_name, if_name);
192 * tipc_bearer_find - locates bearer object with matching bearer name
194 struct tipc_bearer *tipc_bearer_find(struct net *net, const char *name)
196 struct tipc_net *tn = net_generic(net, tipc_net_id);
197 struct tipc_bearer *b_ptr;
200 for (i = 0; i < MAX_BEARERS; i++) {
201 b_ptr = rtnl_dereference(tn->bearer_list[i]);
202 if (b_ptr && (!strcmp(b_ptr->name, name)))
208 void tipc_bearer_add_dest(struct net *net, u32 bearer_id, u32 dest)
210 struct tipc_net *tn = net_generic(net, tipc_net_id);
211 struct tipc_bearer *b_ptr;
214 b_ptr = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
216 tipc_bcbearer_sort(net, &b_ptr->nodes, dest, true);
217 tipc_disc_add_dest(b_ptr->link_req);
222 void tipc_bearer_remove_dest(struct net *net, u32 bearer_id, u32 dest)
224 struct tipc_net *tn = net_generic(net, tipc_net_id);
225 struct tipc_bearer *b_ptr;
228 b_ptr = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
230 tipc_bcbearer_sort(net, &b_ptr->nodes, dest, false);
231 tipc_disc_remove_dest(b_ptr->link_req);
237 * tipc_enable_bearer - enable bearer with the given name
239 static int tipc_enable_bearer(struct net *net, const char *name,
240 u32 disc_domain, u32 priority)
242 struct tipc_net *tn = net_generic(net, tipc_net_id);
243 struct tipc_bearer *b_ptr;
244 struct tipc_media *m_ptr;
245 struct tipc_bearer_names b_names;
246 char addr_string[16];
253 pr_warn("Bearer <%s> rejected, not supported in standalone mode\n",
257 if (!bearer_name_validate(name, &b_names)) {
258 pr_warn("Bearer <%s> rejected, illegal name\n", name);
261 if (tipc_addr_domain_valid(disc_domain) &&
262 (disc_domain != tn->own_addr)) {
263 if (tipc_in_scope(disc_domain, tn->own_addr)) {
264 disc_domain = tn->own_addr & TIPC_CLUSTER_MASK;
265 res = 0; /* accept any node in own cluster */
266 } else if (in_own_cluster_exact(net, disc_domain))
267 res = 0; /* accept specified node in own cluster */
270 pr_warn("Bearer <%s> rejected, illegal discovery domain\n",
274 if ((priority > TIPC_MAX_LINK_PRI) &&
275 (priority != TIPC_MEDIA_LINK_PRI)) {
276 pr_warn("Bearer <%s> rejected, illegal priority\n", name);
280 m_ptr = tipc_media_find(b_names.media_name);
282 pr_warn("Bearer <%s> rejected, media <%s> not registered\n",
283 name, b_names.media_name);
287 if (priority == TIPC_MEDIA_LINK_PRI)
288 priority = m_ptr->priority;
291 bearer_id = MAX_BEARERS;
293 for (i = MAX_BEARERS; i-- != 0; ) {
294 b_ptr = rtnl_dereference(tn->bearer_list[i]);
299 if (!strcmp(name, b_ptr->name)) {
300 pr_warn("Bearer <%s> rejected, already enabled\n",
304 if ((b_ptr->priority == priority) &&
305 (++with_this_prio > 2)) {
306 if (priority-- == 0) {
307 pr_warn("Bearer <%s> rejected, duplicate priority\n",
311 pr_warn("Bearer <%s> priority adjustment required %u->%u\n",
312 name, priority + 1, priority);
316 if (bearer_id >= MAX_BEARERS) {
317 pr_warn("Bearer <%s> rejected, bearer limit reached (%u)\n",
322 b_ptr = kzalloc(sizeof(*b_ptr), GFP_ATOMIC);
326 strcpy(b_ptr->name, name);
327 b_ptr->media = m_ptr;
328 res = m_ptr->enable_media(net, b_ptr);
330 pr_warn("Bearer <%s> rejected, enable failure (%d)\n",
335 b_ptr->identity = bearer_id;
336 b_ptr->tolerance = m_ptr->tolerance;
337 b_ptr->window = m_ptr->window;
338 b_ptr->domain = disc_domain;
339 b_ptr->net_plane = bearer_id + 'A';
340 b_ptr->priority = priority;
342 res = tipc_disc_create(net, b_ptr, &b_ptr->bcast_addr);
344 bearer_disable(net, b_ptr, false);
345 pr_warn("Bearer <%s> rejected, discovery object creation failed\n",
350 rcu_assign_pointer(tn->bearer_list[bearer_id], b_ptr);
352 pr_info("Enabled bearer <%s>, discovery domain %s, priority %u\n",
354 tipc_addr_string_fill(addr_string, disc_domain), priority);
359 * tipc_reset_bearer - Reset all links established over this bearer
361 static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b_ptr)
363 pr_info("Resetting bearer <%s>\n", b_ptr->name);
364 tipc_link_reset_list(net, b_ptr->identity);
365 tipc_disc_reset(net, b_ptr);
372 * Note: This routine assumes caller holds RTNL lock.
374 static void bearer_disable(struct net *net, struct tipc_bearer *b_ptr,
377 struct tipc_net *tn = net_generic(net, tipc_net_id);
380 pr_info("Disabling bearer <%s>\n", b_ptr->name);
381 b_ptr->media->disable_media(b_ptr);
383 tipc_link_delete_list(net, b_ptr->identity, shutting_down);
385 tipc_disc_delete(b_ptr->link_req);
387 for (i = 0; i < MAX_BEARERS; i++) {
388 if (b_ptr == rtnl_dereference(tn->bearer_list[i])) {
389 RCU_INIT_POINTER(tn->bearer_list[i], NULL);
393 kfree_rcu(b_ptr, rcu);
396 int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b)
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,
421 * then get worker thread to complete bearer cleanup. (Can't do cleanup
422 * here because cleanup code needs to sleep and caller holds spinlocks.)
424 void tipc_disable_l2_media(struct tipc_bearer *b)
426 struct net_device *dev;
428 dev = (struct net_device *)rtnl_dereference(b->media_ptr);
429 RCU_INIT_POINTER(b->media_ptr, NULL);
430 RCU_INIT_POINTER(dev->tipc_ptr, NULL);
436 * tipc_l2_send_msg - send a TIPC packet out over an L2 interface
437 * @buf: the packet to be sent
438 * @b_ptr: the bearer through which the packet is to be sent
439 * @dest: peer destination address
441 int tipc_l2_send_msg(struct net *net, struct sk_buff *buf,
442 struct tipc_bearer *b, struct tipc_media_addr *dest)
444 struct sk_buff *clone;
445 struct net_device *dev;
448 dev = (struct net_device *)rcu_dereference_rtnl(b->media_ptr);
452 clone = skb_clone(buf, GFP_ATOMIC);
456 delta = dev->hard_header_len - skb_headroom(buf);
458 pskb_expand_head(clone, SKB_DATA_ALIGN(delta), 0, GFP_ATOMIC)) {
463 skb_reset_network_header(clone);
465 clone->protocol = htons(ETH_P_TIPC);
466 dev_hard_header(clone, dev, ETH_P_TIPC, dest->value,
467 dev->dev_addr, clone->len);
468 dev_queue_xmit(clone);
472 /* tipc_bearer_send- sends buffer to destination over bearer
475 * The media send routine must not alter the buffer being passed in
476 * as it may be needed for later retransmission!
478 void tipc_bearer_send(struct net *net, u32 bearer_id, struct sk_buff *buf,
479 struct tipc_media_addr *dest)
481 struct tipc_net *tn = net_generic(net, tipc_net_id);
482 struct tipc_bearer *b_ptr;
485 b_ptr = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
487 b_ptr->media->send_msg(net, buf, b_ptr, dest);
492 * tipc_l2_rcv_msg - handle incoming TIPC message from an interface
493 * @buf: the received packet
494 * @dev: the net device that the packet was received on
495 * @pt: the packet_type structure which was used to register this handler
496 * @orig_dev: the original receive net device in case the device is a bond
498 * Accept only packets explicitly sent to this node, or broadcast packets;
499 * ignores packets sent using interface multicast, and traffic sent to other
500 * nodes (which can happen if interface is running in promiscuous mode).
502 static int tipc_l2_rcv_msg(struct sk_buff *buf, struct net_device *dev,
503 struct packet_type *pt, struct net_device *orig_dev)
505 struct tipc_bearer *b_ptr;
508 b_ptr = rcu_dereference_rtnl(dev->tipc_ptr);
510 if (likely(buf->pkt_type <= PACKET_BROADCAST)) {
512 tipc_rcv(dev_net(dev), buf, b_ptr);
514 return NET_RX_SUCCESS;
524 * tipc_l2_device_event - handle device events from network device
525 * @nb: the context of the notification
526 * @evt: the type of event
527 * @ptr: the net device that the event was on
529 * This function is called by the Ethernet driver in case of link
532 static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt,
535 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
536 struct net *net = dev_net(dev);
537 struct tipc_bearer *b_ptr;
539 b_ptr = rtnl_dereference(dev->tipc_ptr);
543 b_ptr->mtu = dev->mtu;
547 if (netif_carrier_ok(dev))
550 case NETDEV_CHANGEMTU:
551 tipc_reset_bearer(net, b_ptr);
553 case NETDEV_CHANGEADDR:
554 b_ptr->media->raw2addr(b_ptr, &b_ptr->addr,
555 (char *)dev->dev_addr);
556 tipc_reset_bearer(net, b_ptr);
558 case NETDEV_UNREGISTER:
559 case NETDEV_CHANGENAME:
560 bearer_disable(dev_net(dev), b_ptr, false);
566 static struct packet_type tipc_packet_type __read_mostly = {
567 .type = htons(ETH_P_TIPC),
568 .func = tipc_l2_rcv_msg,
571 static struct notifier_block notifier = {
572 .notifier_call = tipc_l2_device_event,
576 int tipc_bearer_setup(void)
580 err = register_netdevice_notifier(¬ifier);
583 dev_add_pack(&tipc_packet_type);
587 void tipc_bearer_cleanup(void)
589 unregister_netdevice_notifier(¬ifier);
590 dev_remove_pack(&tipc_packet_type);
593 void tipc_bearer_stop(struct net *net)
595 struct tipc_net *tn = net_generic(net, tipc_net_id);
596 struct tipc_bearer *b_ptr;
599 for (i = 0; i < MAX_BEARERS; i++) {
600 b_ptr = rtnl_dereference(tn->bearer_list[i]);
602 bearer_disable(net, b_ptr, true);
603 tn->bearer_list[i] = NULL;
608 /* Caller should hold rtnl_lock to protect the bearer */
609 static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg,
610 struct tipc_bearer *bearer)
613 struct nlattr *attrs;
616 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
617 NLM_F_MULTI, TIPC_NL_BEARER_GET);
621 attrs = nla_nest_start(msg->skb, TIPC_NLA_BEARER);
625 if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name))
628 prop = nla_nest_start(msg->skb, TIPC_NLA_BEARER_PROP);
631 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority))
633 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance))
635 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window))
638 nla_nest_end(msg->skb, prop);
639 nla_nest_end(msg->skb, attrs);
640 genlmsg_end(msg->skb, hdr);
645 nla_nest_cancel(msg->skb, prop);
647 nla_nest_cancel(msg->skb, attrs);
649 genlmsg_cancel(msg->skb, hdr);
654 int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb)
658 struct tipc_bearer *bearer;
659 struct tipc_nl_msg msg;
660 struct net *net = sock_net(skb->sk);
661 struct tipc_net *tn = net_generic(net, tipc_net_id);
663 if (i == MAX_BEARERS)
667 msg.portid = NETLINK_CB(cb->skb).portid;
668 msg.seq = cb->nlh->nlmsg_seq;
671 for (i = 0; i < MAX_BEARERS; i++) {
672 bearer = rtnl_dereference(tn->bearer_list[i]);
676 err = __tipc_nl_add_bearer(&msg, bearer);
686 int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info)
691 struct tipc_bearer *bearer;
692 struct tipc_nl_msg msg;
693 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
694 struct net *net = genl_info_net(info);
696 if (!info->attrs[TIPC_NLA_BEARER])
699 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
700 info->attrs[TIPC_NLA_BEARER],
701 tipc_nl_bearer_policy);
705 if (!attrs[TIPC_NLA_BEARER_NAME])
707 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
709 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
714 msg.portid = info->snd_portid;
715 msg.seq = info->snd_seq;
718 bearer = tipc_bearer_find(net, name);
724 err = __tipc_nl_add_bearer(&msg, bearer);
729 return genlmsg_reply(rep, info);
737 int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info)
741 struct tipc_bearer *bearer;
742 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
743 struct net *net = sock_net(skb->sk);
745 if (!info->attrs[TIPC_NLA_BEARER])
748 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
749 info->attrs[TIPC_NLA_BEARER],
750 tipc_nl_bearer_policy);
754 if (!attrs[TIPC_NLA_BEARER_NAME])
757 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
760 bearer = tipc_bearer_find(net, name);
766 bearer_disable(net, bearer, false);
772 int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
776 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
777 struct net *net = sock_net(skb->sk);
778 struct tipc_net *tn = net_generic(net, tipc_net_id);
782 prio = TIPC_MEDIA_LINK_PRI;
783 domain = tn->own_addr & TIPC_CLUSTER_MASK;
785 if (!info->attrs[TIPC_NLA_BEARER])
788 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
789 info->attrs[TIPC_NLA_BEARER],
790 tipc_nl_bearer_policy);
794 if (!attrs[TIPC_NLA_BEARER_NAME])
797 bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
799 if (attrs[TIPC_NLA_BEARER_DOMAIN])
800 domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]);
802 if (attrs[TIPC_NLA_BEARER_PROP]) {
803 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
805 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
810 if (props[TIPC_NLA_PROP_PRIO])
811 prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
815 err = tipc_enable_bearer(net, bearer, domain, prio);
825 int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
829 struct tipc_bearer *b;
830 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
831 struct net *net = genl_info_net(info);
833 if (!info->attrs[TIPC_NLA_BEARER])
836 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
837 info->attrs[TIPC_NLA_BEARER],
838 tipc_nl_bearer_policy);
842 if (!attrs[TIPC_NLA_BEARER_NAME])
844 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
847 b = tipc_bearer_find(net, name);
853 if (attrs[TIPC_NLA_BEARER_PROP]) {
854 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
856 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
863 if (props[TIPC_NLA_PROP_TOL])
864 b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
865 if (props[TIPC_NLA_PROP_PRIO])
866 b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
867 if (props[TIPC_NLA_PROP_WIN])
868 b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
875 static int __tipc_nl_add_media(struct tipc_nl_msg *msg,
876 struct tipc_media *media)
879 struct nlattr *attrs;
882 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
883 NLM_F_MULTI, TIPC_NL_MEDIA_GET);
887 attrs = nla_nest_start(msg->skb, TIPC_NLA_MEDIA);
891 if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name))
894 prop = nla_nest_start(msg->skb, TIPC_NLA_MEDIA_PROP);
897 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority))
899 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance))
901 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window))
904 nla_nest_end(msg->skb, prop);
905 nla_nest_end(msg->skb, attrs);
906 genlmsg_end(msg->skb, hdr);
911 nla_nest_cancel(msg->skb, prop);
913 nla_nest_cancel(msg->skb, attrs);
915 genlmsg_cancel(msg->skb, hdr);
920 int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb)
924 struct tipc_nl_msg msg;
930 msg.portid = NETLINK_CB(cb->skb).portid;
931 msg.seq = cb->nlh->nlmsg_seq;
934 for (; media_info_array[i] != NULL; i++) {
935 err = __tipc_nl_add_media(&msg, media_info_array[i]);
945 int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info)
949 struct tipc_nl_msg msg;
950 struct tipc_media *media;
952 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
954 if (!info->attrs[TIPC_NLA_MEDIA])
957 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
958 info->attrs[TIPC_NLA_MEDIA],
959 tipc_nl_media_policy);
963 if (!attrs[TIPC_NLA_MEDIA_NAME])
965 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
967 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
972 msg.portid = info->snd_portid;
973 msg.seq = info->snd_seq;
976 media = tipc_media_find(name);
982 err = __tipc_nl_add_media(&msg, media);
987 return genlmsg_reply(rep, info);
995 int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
999 struct tipc_media *m;
1000 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1002 if (!info->attrs[TIPC_NLA_MEDIA])
1005 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
1006 info->attrs[TIPC_NLA_MEDIA],
1007 tipc_nl_media_policy);
1009 if (!attrs[TIPC_NLA_MEDIA_NAME])
1011 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1014 m = tipc_media_find(name);
1020 if (attrs[TIPC_NLA_MEDIA_PROP]) {
1021 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
1023 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP],
1030 if (props[TIPC_NLA_PROP_TOL])
1031 m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
1032 if (props[TIPC_NLA_PROP_PRIO])
1033 m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
1034 if (props[TIPC_NLA_PROP_WIN])
1035 m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);