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
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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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)))
209 * tipc_bearer_get_names - record names of bearers in buffer
211 struct sk_buff *tipc_bearer_get_names(struct net *net)
213 struct tipc_net *tn = net_generic(net, tipc_net_id);
215 struct tipc_bearer *b;
218 buf = tipc_cfg_reply_alloc(MAX_BEARERS * TLV_SPACE(TIPC_MAX_BEARER_NAME));
222 for (i = 0; media_info_array[i] != NULL; i++) {
223 for (j = 0; j < MAX_BEARERS; j++) {
224 b = rtnl_dereference(tn->bearer_list[j]);
227 if (b->media == media_info_array[i]) {
228 tipc_cfg_append_tlv(buf, TIPC_TLV_BEARER_NAME,
230 strlen(b->name) + 1);
237 void tipc_bearer_add_dest(struct net *net, u32 bearer_id, u32 dest)
239 struct tipc_net *tn = net_generic(net, tipc_net_id);
240 struct tipc_bearer *b_ptr;
243 b_ptr = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
245 tipc_bcbearer_sort(net, &b_ptr->nodes, dest, true);
246 tipc_disc_add_dest(b_ptr->link_req);
251 void tipc_bearer_remove_dest(struct net *net, u32 bearer_id, u32 dest)
253 struct tipc_net *tn = net_generic(net, tipc_net_id);
254 struct tipc_bearer *b_ptr;
257 b_ptr = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
259 tipc_bcbearer_sort(net, &b_ptr->nodes, dest, false);
260 tipc_disc_remove_dest(b_ptr->link_req);
266 * tipc_enable_bearer - enable bearer with the given name
268 int tipc_enable_bearer(struct net *net, const char *name, u32 disc_domain,
271 struct tipc_net *tn = net_generic(net, tipc_net_id);
272 struct tipc_bearer *b_ptr;
273 struct tipc_media *m_ptr;
274 struct tipc_bearer_names b_names;
275 char addr_string[16];
282 pr_warn("Bearer <%s> rejected, not supported in standalone mode\n",
286 if (!bearer_name_validate(name, &b_names)) {
287 pr_warn("Bearer <%s> rejected, illegal name\n", name);
290 if (tipc_addr_domain_valid(disc_domain) &&
291 (disc_domain != tn->own_addr)) {
292 if (tipc_in_scope(disc_domain, tn->own_addr)) {
293 disc_domain = tn->own_addr & TIPC_CLUSTER_MASK;
294 res = 0; /* accept any node in own cluster */
295 } else if (in_own_cluster_exact(net, disc_domain))
296 res = 0; /* accept specified node in own cluster */
299 pr_warn("Bearer <%s> rejected, illegal discovery domain\n",
303 if ((priority > TIPC_MAX_LINK_PRI) &&
304 (priority != TIPC_MEDIA_LINK_PRI)) {
305 pr_warn("Bearer <%s> rejected, illegal priority\n", name);
309 m_ptr = tipc_media_find(b_names.media_name);
311 pr_warn("Bearer <%s> rejected, media <%s> not registered\n",
312 name, b_names.media_name);
316 if (priority == TIPC_MEDIA_LINK_PRI)
317 priority = m_ptr->priority;
320 bearer_id = MAX_BEARERS;
322 for (i = MAX_BEARERS; i-- != 0; ) {
323 b_ptr = rtnl_dereference(tn->bearer_list[i]);
328 if (!strcmp(name, b_ptr->name)) {
329 pr_warn("Bearer <%s> rejected, already enabled\n",
333 if ((b_ptr->priority == priority) &&
334 (++with_this_prio > 2)) {
335 if (priority-- == 0) {
336 pr_warn("Bearer <%s> rejected, duplicate priority\n",
340 pr_warn("Bearer <%s> priority adjustment required %u->%u\n",
341 name, priority + 1, priority);
345 if (bearer_id >= MAX_BEARERS) {
346 pr_warn("Bearer <%s> rejected, bearer limit reached (%u)\n",
351 b_ptr = kzalloc(sizeof(*b_ptr), GFP_ATOMIC);
355 strcpy(b_ptr->name, name);
356 b_ptr->media = m_ptr;
357 res = m_ptr->enable_media(net, b_ptr);
359 pr_warn("Bearer <%s> rejected, enable failure (%d)\n",
364 b_ptr->identity = bearer_id;
365 b_ptr->tolerance = m_ptr->tolerance;
366 b_ptr->window = m_ptr->window;
367 b_ptr->domain = disc_domain;
368 b_ptr->net_plane = bearer_id + 'A';
369 b_ptr->priority = priority;
371 res = tipc_disc_create(net, b_ptr, &b_ptr->bcast_addr);
373 bearer_disable(net, b_ptr, false);
374 pr_warn("Bearer <%s> rejected, discovery object creation failed\n",
379 rcu_assign_pointer(tn->bearer_list[bearer_id], b_ptr);
381 pr_info("Enabled bearer <%s>, discovery domain %s, priority %u\n",
383 tipc_addr_string_fill(addr_string, disc_domain), priority);
388 * tipc_reset_bearer - Reset all links established over this bearer
390 static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b_ptr)
392 pr_info("Resetting bearer <%s>\n", b_ptr->name);
393 tipc_link_reset_list(net, b_ptr->identity);
394 tipc_disc_reset(net, b_ptr);
401 * Note: This routine assumes caller holds RTNL lock.
403 static void bearer_disable(struct net *net, struct tipc_bearer *b_ptr,
406 struct tipc_net *tn = net_generic(net, tipc_net_id);
409 pr_info("Disabling bearer <%s>\n", b_ptr->name);
410 b_ptr->media->disable_media(b_ptr);
412 tipc_link_delete_list(net, b_ptr->identity, shutting_down);
414 tipc_disc_delete(b_ptr->link_req);
416 for (i = 0; i < MAX_BEARERS; i++) {
417 if (b_ptr == rtnl_dereference(tn->bearer_list[i])) {
418 RCU_INIT_POINTER(tn->bearer_list[i], NULL);
422 kfree_rcu(b_ptr, rcu);
425 int tipc_disable_bearer(struct net *net, const char *name)
427 struct tipc_bearer *b_ptr;
430 b_ptr = tipc_bearer_find(net, name);
432 pr_warn("Attempt to disable unknown bearer <%s>\n", name);
435 bearer_disable(net, b_ptr, false);
441 int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b)
443 struct net_device *dev;
444 char *driver_name = strchr((const char *)b->name, ':') + 1;
446 /* Find device with specified name */
447 dev = dev_get_by_name(net, driver_name);
451 /* Associate TIPC bearer with L2 bearer */
452 rcu_assign_pointer(b->media_ptr, dev);
453 memset(&b->bcast_addr, 0, sizeof(b->bcast_addr));
454 memcpy(b->bcast_addr.value, dev->broadcast, b->media->hwaddr_len);
455 b->bcast_addr.media_id = b->media->type_id;
456 b->bcast_addr.broadcast = 1;
458 b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr);
459 rcu_assign_pointer(dev->tipc_ptr, b);
463 /* tipc_disable_l2_media - detach TIPC bearer from an L2 interface
465 * Mark L2 bearer as inactive so that incoming buffers are thrown away,
466 * then get worker thread to complete bearer cleanup. (Can't do cleanup
467 * here because cleanup code needs to sleep and caller holds spinlocks.)
469 void tipc_disable_l2_media(struct tipc_bearer *b)
471 struct net_device *dev;
473 dev = (struct net_device *)rtnl_dereference(b->media_ptr);
474 RCU_INIT_POINTER(b->media_ptr, NULL);
475 RCU_INIT_POINTER(dev->tipc_ptr, NULL);
481 * tipc_l2_send_msg - send a TIPC packet out over an L2 interface
482 * @buf: the packet to be sent
483 * @b_ptr: the bearer through which the packet is to be sent
484 * @dest: peer destination address
486 int tipc_l2_send_msg(struct net *net, struct sk_buff *buf,
487 struct tipc_bearer *b, struct tipc_media_addr *dest)
489 struct sk_buff *clone;
490 struct net_device *dev;
493 dev = (struct net_device *)rcu_dereference_rtnl(b->media_ptr);
497 clone = skb_clone(buf, GFP_ATOMIC);
501 delta = dev->hard_header_len - skb_headroom(buf);
503 pskb_expand_head(clone, SKB_DATA_ALIGN(delta), 0, GFP_ATOMIC)) {
508 skb_reset_network_header(clone);
510 clone->protocol = htons(ETH_P_TIPC);
511 dev_hard_header(clone, dev, ETH_P_TIPC, dest->value,
512 dev->dev_addr, clone->len);
513 dev_queue_xmit(clone);
517 /* tipc_bearer_send- sends buffer to destination over bearer
520 * The media send routine must not alter the buffer being passed in
521 * as it may be needed for later retransmission!
523 void tipc_bearer_send(struct net *net, u32 bearer_id, struct sk_buff *buf,
524 struct tipc_media_addr *dest)
526 struct tipc_net *tn = net_generic(net, tipc_net_id);
527 struct tipc_bearer *b_ptr;
530 b_ptr = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
532 b_ptr->media->send_msg(net, buf, b_ptr, dest);
537 * tipc_l2_rcv_msg - handle incoming TIPC message from an interface
538 * @buf: the received packet
539 * @dev: the net device that the packet was received on
540 * @pt: the packet_type structure which was used to register this handler
541 * @orig_dev: the original receive net device in case the device is a bond
543 * Accept only packets explicitly sent to this node, or broadcast packets;
544 * ignores packets sent using interface multicast, and traffic sent to other
545 * nodes (which can happen if interface is running in promiscuous mode).
547 static int tipc_l2_rcv_msg(struct sk_buff *buf, struct net_device *dev,
548 struct packet_type *pt, struct net_device *orig_dev)
550 struct tipc_bearer *b_ptr;
553 b_ptr = rcu_dereference_rtnl(dev->tipc_ptr);
555 if (likely(buf->pkt_type <= PACKET_BROADCAST)) {
557 tipc_rcv(dev_net(dev), buf, b_ptr);
559 return NET_RX_SUCCESS;
569 * tipc_l2_device_event - handle device events from network device
570 * @nb: the context of the notification
571 * @evt: the type of event
572 * @ptr: the net device that the event was on
574 * This function is called by the Ethernet driver in case of link
577 static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt,
580 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
581 struct net *net = dev_net(dev);
582 struct tipc_bearer *b_ptr;
584 b_ptr = rtnl_dereference(dev->tipc_ptr);
588 b_ptr->mtu = dev->mtu;
592 if (netif_carrier_ok(dev))
595 case NETDEV_CHANGEMTU:
596 tipc_reset_bearer(net, b_ptr);
598 case NETDEV_CHANGEADDR:
599 b_ptr->media->raw2addr(b_ptr, &b_ptr->addr,
600 (char *)dev->dev_addr);
601 tipc_reset_bearer(net, b_ptr);
603 case NETDEV_UNREGISTER:
604 case NETDEV_CHANGENAME:
605 bearer_disable(dev_net(dev), b_ptr, false);
611 static struct packet_type tipc_packet_type __read_mostly = {
612 .type = htons(ETH_P_TIPC),
613 .func = tipc_l2_rcv_msg,
616 static struct notifier_block notifier = {
617 .notifier_call = tipc_l2_device_event,
621 int tipc_bearer_setup(void)
625 err = register_netdevice_notifier(¬ifier);
628 dev_add_pack(&tipc_packet_type);
632 void tipc_bearer_cleanup(void)
634 unregister_netdevice_notifier(¬ifier);
635 dev_remove_pack(&tipc_packet_type);
638 void tipc_bearer_stop(struct net *net)
640 struct tipc_net *tn = net_generic(net, tipc_net_id);
641 struct tipc_bearer *b_ptr;
644 for (i = 0; i < MAX_BEARERS; i++) {
645 b_ptr = rtnl_dereference(tn->bearer_list[i]);
647 bearer_disable(net, b_ptr, true);
648 tn->bearer_list[i] = NULL;
653 /* Caller should hold rtnl_lock to protect the bearer */
654 static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg,
655 struct tipc_bearer *bearer)
658 struct nlattr *attrs;
661 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_v2_family,
662 NLM_F_MULTI, TIPC_NL_BEARER_GET);
666 attrs = nla_nest_start(msg->skb, TIPC_NLA_BEARER);
670 if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name))
673 prop = nla_nest_start(msg->skb, TIPC_NLA_BEARER_PROP);
676 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority))
678 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance))
680 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window))
683 nla_nest_end(msg->skb, prop);
684 nla_nest_end(msg->skb, attrs);
685 genlmsg_end(msg->skb, hdr);
690 nla_nest_cancel(msg->skb, prop);
692 nla_nest_cancel(msg->skb, attrs);
694 genlmsg_cancel(msg->skb, hdr);
699 int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb)
703 struct tipc_bearer *bearer;
704 struct tipc_nl_msg msg;
705 struct net *net = sock_net(skb->sk);
706 struct tipc_net *tn = net_generic(net, tipc_net_id);
708 if (i == MAX_BEARERS)
712 msg.portid = NETLINK_CB(cb->skb).portid;
713 msg.seq = cb->nlh->nlmsg_seq;
716 for (i = 0; i < MAX_BEARERS; i++) {
717 bearer = rtnl_dereference(tn->bearer_list[i]);
721 err = __tipc_nl_add_bearer(&msg, bearer);
731 int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info)
736 struct tipc_bearer *bearer;
737 struct tipc_nl_msg msg;
738 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
739 struct net *net = genl_info_net(info);
741 if (!info->attrs[TIPC_NLA_BEARER])
744 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
745 info->attrs[TIPC_NLA_BEARER],
746 tipc_nl_bearer_policy);
750 if (!attrs[TIPC_NLA_BEARER_NAME])
752 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
754 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
759 msg.portid = info->snd_portid;
760 msg.seq = info->snd_seq;
763 bearer = tipc_bearer_find(net, name);
769 err = __tipc_nl_add_bearer(&msg, bearer);
774 return genlmsg_reply(rep, info);
782 int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info)
786 struct tipc_bearer *bearer;
787 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
788 struct net *net = genl_info_net(info);
790 if (!info->attrs[TIPC_NLA_BEARER])
793 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
794 info->attrs[TIPC_NLA_BEARER],
795 tipc_nl_bearer_policy);
799 if (!attrs[TIPC_NLA_BEARER_NAME])
802 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
805 bearer = tipc_bearer_find(net, name);
811 bearer_disable(net, bearer, false);
817 int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
819 struct net *net = genl_info_net(info);
820 struct tipc_net *tn = net_generic(net, tipc_net_id);
823 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
827 prio = TIPC_MEDIA_LINK_PRI;
828 domain = tn->own_addr & TIPC_CLUSTER_MASK;
830 if (!info->attrs[TIPC_NLA_BEARER])
833 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
834 info->attrs[TIPC_NLA_BEARER],
835 tipc_nl_bearer_policy);
839 if (!attrs[TIPC_NLA_BEARER_NAME])
842 bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
844 if (attrs[TIPC_NLA_BEARER_DOMAIN])
845 domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]);
847 if (attrs[TIPC_NLA_BEARER_PROP]) {
848 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
850 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
855 if (props[TIPC_NLA_PROP_PRIO])
856 prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
860 err = tipc_enable_bearer(net, bearer, domain, prio);
870 int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
874 struct tipc_bearer *b;
875 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
876 struct net *net = genl_info_net(info);
878 if (!info->attrs[TIPC_NLA_BEARER])
881 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
882 info->attrs[TIPC_NLA_BEARER],
883 tipc_nl_bearer_policy);
887 if (!attrs[TIPC_NLA_BEARER_NAME])
889 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
892 b = tipc_bearer_find(net, name);
898 if (attrs[TIPC_NLA_BEARER_PROP]) {
899 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
901 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
908 if (props[TIPC_NLA_PROP_TOL])
909 b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
910 if (props[TIPC_NLA_PROP_PRIO])
911 b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
912 if (props[TIPC_NLA_PROP_WIN])
913 b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
920 static int __tipc_nl_add_media(struct tipc_nl_msg *msg,
921 struct tipc_media *media)
924 struct nlattr *attrs;
927 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_v2_family,
928 NLM_F_MULTI, TIPC_NL_MEDIA_GET);
932 attrs = nla_nest_start(msg->skb, TIPC_NLA_MEDIA);
936 if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name))
939 prop = nla_nest_start(msg->skb, TIPC_NLA_MEDIA_PROP);
942 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority))
944 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance))
946 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window))
949 nla_nest_end(msg->skb, prop);
950 nla_nest_end(msg->skb, attrs);
951 genlmsg_end(msg->skb, hdr);
956 nla_nest_cancel(msg->skb, prop);
958 nla_nest_cancel(msg->skb, attrs);
960 genlmsg_cancel(msg->skb, hdr);
965 int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb)
969 struct tipc_nl_msg msg;
975 msg.portid = NETLINK_CB(cb->skb).portid;
976 msg.seq = cb->nlh->nlmsg_seq;
979 for (; media_info_array[i] != NULL; i++) {
980 err = __tipc_nl_add_media(&msg, media_info_array[i]);
990 int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info)
994 struct tipc_nl_msg msg;
995 struct tipc_media *media;
997 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
999 if (!info->attrs[TIPC_NLA_MEDIA])
1002 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
1003 info->attrs[TIPC_NLA_MEDIA],
1004 tipc_nl_media_policy);
1008 if (!attrs[TIPC_NLA_MEDIA_NAME])
1010 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1012 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1017 msg.portid = info->snd_portid;
1018 msg.seq = info->snd_seq;
1021 media = tipc_media_find(name);
1027 err = __tipc_nl_add_media(&msg, media);
1032 return genlmsg_reply(rep, info);
1040 int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
1044 struct tipc_media *m;
1045 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1047 if (!info->attrs[TIPC_NLA_MEDIA])
1050 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
1051 info->attrs[TIPC_NLA_MEDIA],
1052 tipc_nl_media_policy);
1054 if (!attrs[TIPC_NLA_MEDIA_NAME])
1056 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1059 m = tipc_media_find(name);
1065 if (attrs[TIPC_NLA_MEDIA_PROP]) {
1066 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
1068 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP],
1075 if (props[TIPC_NLA_PROP_TOL])
1076 m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
1077 if (props[TIPC_NLA_PROP_PRIO])
1078 m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
1079 if (props[TIPC_NLA_PROP_WIN])
1080 m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);