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.
43 #define MAX_ADDR_STR 60
45 static struct tipc_media * const media_info_array[] = {
47 #ifdef CONFIG_TIPC_MEDIA_IB
53 static const struct nla_policy
54 tipc_nl_bearer_policy[TIPC_NLA_BEARER_MAX + 1] = {
55 [TIPC_NLA_BEARER_UNSPEC] = { .type = NLA_UNSPEC },
56 [TIPC_NLA_BEARER_NAME] = {
58 .len = TIPC_MAX_BEARER_NAME
60 [TIPC_NLA_BEARER_PROP] = { .type = NLA_NESTED },
61 [TIPC_NLA_BEARER_DOMAIN] = { .type = NLA_U32 }
64 static const struct nla_policy tipc_nl_media_policy[TIPC_NLA_MEDIA_MAX + 1] = {
65 [TIPC_NLA_MEDIA_UNSPEC] = { .type = NLA_UNSPEC },
66 [TIPC_NLA_MEDIA_NAME] = { .type = NLA_STRING },
67 [TIPC_NLA_MEDIA_PROP] = { .type = NLA_NESTED }
70 struct tipc_bearer __rcu *bearer_list[MAX_BEARERS + 1];
72 static void bearer_disable(struct tipc_bearer *b_ptr, bool shutting_down);
75 * tipc_media_find - locates specified media object by name
77 struct tipc_media *tipc_media_find(const char *name)
81 for (i = 0; media_info_array[i] != NULL; i++) {
82 if (!strcmp(media_info_array[i]->name, name))
85 return media_info_array[i];
89 * media_find_id - locates specified media object by type identifier
91 static struct tipc_media *media_find_id(u8 type)
95 for (i = 0; media_info_array[i] != NULL; i++) {
96 if (media_info_array[i]->type_id == type)
99 return media_info_array[i];
103 * tipc_media_addr_printf - record media address in print buffer
105 void tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a)
107 char addr_str[MAX_ADDR_STR];
108 struct tipc_media *m_ptr;
111 m_ptr = media_find_id(a->media_id);
113 if (m_ptr && !m_ptr->addr2str(a, addr_str, sizeof(addr_str)))
114 ret = tipc_snprintf(buf, len, "%s(%s)", m_ptr->name, addr_str);
118 ret = tipc_snprintf(buf, len, "UNKNOWN(%u)", a->media_id);
119 for (i = 0; i < sizeof(a->value); i++)
120 ret += tipc_snprintf(buf - ret, len + ret,
121 "-%02x", a->value[i]);
126 * tipc_media_get_names - record names of registered media in buffer
128 struct sk_buff *tipc_media_get_names(void)
133 buf = tipc_cfg_reply_alloc(MAX_MEDIA * TLV_SPACE(TIPC_MAX_MEDIA_NAME));
137 for (i = 0; media_info_array[i] != NULL; i++) {
138 tipc_cfg_append_tlv(buf, TIPC_TLV_MEDIA_NAME,
139 media_info_array[i]->name,
140 strlen(media_info_array[i]->name) + 1);
146 * bearer_name_validate - validate & (optionally) deconstruct bearer name
147 * @name: ptr to bearer name string
148 * @name_parts: ptr to area for bearer name components (or NULL if not needed)
150 * Returns 1 if bearer name is valid, otherwise 0.
152 static int bearer_name_validate(const char *name,
153 struct tipc_bearer_names *name_parts)
155 char name_copy[TIPC_MAX_BEARER_NAME];
161 /* copy bearer name & ensure length is OK */
162 name_copy[TIPC_MAX_BEARER_NAME - 1] = 0;
163 /* need above in case non-Posix strncpy() doesn't pad with nulls */
164 strncpy(name_copy, name, TIPC_MAX_BEARER_NAME);
165 if (name_copy[TIPC_MAX_BEARER_NAME - 1] != 0)
168 /* ensure all component parts of bearer name are present */
169 media_name = name_copy;
170 if_name = strchr(media_name, ':');
174 media_len = if_name - media_name;
175 if_len = strlen(if_name) + 1;
177 /* validate component parts of bearer name */
178 if ((media_len <= 1) || (media_len > TIPC_MAX_MEDIA_NAME) ||
179 (if_len <= 1) || (if_len > TIPC_MAX_IF_NAME))
182 /* return bearer name components, if necessary */
184 strcpy(name_parts->media_name, media_name);
185 strcpy(name_parts->if_name, if_name);
191 * tipc_bearer_find - locates bearer object with matching bearer name
193 struct tipc_bearer *tipc_bearer_find(const char *name)
195 struct tipc_bearer *b_ptr;
198 for (i = 0; i < MAX_BEARERS; i++) {
199 b_ptr = rtnl_dereference(bearer_list[i]);
200 if (b_ptr && (!strcmp(b_ptr->name, name)))
207 * tipc_bearer_get_names - record names of bearers in buffer
209 struct sk_buff *tipc_bearer_get_names(void)
212 struct tipc_bearer *b;
215 buf = tipc_cfg_reply_alloc(MAX_BEARERS * TLV_SPACE(TIPC_MAX_BEARER_NAME));
219 for (i = 0; media_info_array[i] != NULL; i++) {
220 for (j = 0; j < MAX_BEARERS; j++) {
221 b = rtnl_dereference(bearer_list[j]);
224 if (b->media == media_info_array[i]) {
225 tipc_cfg_append_tlv(buf, TIPC_TLV_BEARER_NAME,
227 strlen(b->name) + 1);
234 void tipc_bearer_add_dest(u32 bearer_id, u32 dest)
236 struct tipc_bearer *b_ptr;
239 b_ptr = rcu_dereference_rtnl(bearer_list[bearer_id]);
241 tipc_bcbearer_sort(&b_ptr->nodes, dest, true);
242 tipc_disc_add_dest(b_ptr->link_req);
247 void tipc_bearer_remove_dest(u32 bearer_id, u32 dest)
249 struct tipc_bearer *b_ptr;
252 b_ptr = rcu_dereference_rtnl(bearer_list[bearer_id]);
254 tipc_bcbearer_sort(&b_ptr->nodes, dest, false);
255 tipc_disc_remove_dest(b_ptr->link_req);
261 * tipc_enable_bearer - enable bearer with the given name
263 int tipc_enable_bearer(struct net *net, const char *name, u32 disc_domain,
266 struct tipc_bearer *b_ptr;
267 struct tipc_media *m_ptr;
268 struct tipc_bearer_names b_names;
269 char addr_string[16];
275 if (!tipc_own_addr) {
276 pr_warn("Bearer <%s> rejected, not supported in standalone mode\n",
280 if (!bearer_name_validate(name, &b_names)) {
281 pr_warn("Bearer <%s> rejected, illegal name\n", name);
284 if (tipc_addr_domain_valid(disc_domain) &&
285 (disc_domain != tipc_own_addr)) {
286 if (tipc_in_scope(disc_domain, tipc_own_addr)) {
287 disc_domain = tipc_own_addr & TIPC_CLUSTER_MASK;
288 res = 0; /* accept any node in own cluster */
289 } else if (in_own_cluster_exact(disc_domain))
290 res = 0; /* accept specified node in own cluster */
293 pr_warn("Bearer <%s> rejected, illegal discovery domain\n",
297 if ((priority > TIPC_MAX_LINK_PRI) &&
298 (priority != TIPC_MEDIA_LINK_PRI)) {
299 pr_warn("Bearer <%s> rejected, illegal priority\n", name);
303 m_ptr = tipc_media_find(b_names.media_name);
305 pr_warn("Bearer <%s> rejected, media <%s> not registered\n",
306 name, b_names.media_name);
310 if (priority == TIPC_MEDIA_LINK_PRI)
311 priority = m_ptr->priority;
314 bearer_id = MAX_BEARERS;
316 for (i = MAX_BEARERS; i-- != 0; ) {
317 b_ptr = rtnl_dereference(bearer_list[i]);
322 if (!strcmp(name, b_ptr->name)) {
323 pr_warn("Bearer <%s> rejected, already enabled\n",
327 if ((b_ptr->priority == priority) &&
328 (++with_this_prio > 2)) {
329 if (priority-- == 0) {
330 pr_warn("Bearer <%s> rejected, duplicate priority\n",
334 pr_warn("Bearer <%s> priority adjustment required %u->%u\n",
335 name, priority + 1, priority);
339 if (bearer_id >= MAX_BEARERS) {
340 pr_warn("Bearer <%s> rejected, bearer limit reached (%u)\n",
345 b_ptr = kzalloc(sizeof(*b_ptr), GFP_ATOMIC);
349 strcpy(b_ptr->name, name);
350 b_ptr->media = m_ptr;
351 res = m_ptr->enable_media(b_ptr);
353 pr_warn("Bearer <%s> rejected, enable failure (%d)\n",
358 b_ptr->identity = bearer_id;
359 b_ptr->tolerance = m_ptr->tolerance;
360 b_ptr->window = m_ptr->window;
361 b_ptr->domain = disc_domain;
362 b_ptr->net_plane = bearer_id + 'A';
363 b_ptr->priority = priority;
365 res = tipc_disc_create(net, b_ptr, &b_ptr->bcast_addr);
367 bearer_disable(b_ptr, false);
368 pr_warn("Bearer <%s> rejected, discovery object creation failed\n",
373 rcu_assign_pointer(bearer_list[bearer_id], b_ptr);
375 pr_info("Enabled bearer <%s>, discovery domain %s, priority %u\n",
377 tipc_addr_string_fill(addr_string, disc_domain), priority);
382 * tipc_reset_bearer - Reset all links established over this bearer
384 static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b_ptr)
386 pr_info("Resetting bearer <%s>\n", b_ptr->name);
387 tipc_link_reset_list(b_ptr->identity);
388 tipc_disc_reset(net, b_ptr);
395 * Note: This routine assumes caller holds RTNL lock.
397 static void bearer_disable(struct tipc_bearer *b_ptr, bool shutting_down)
401 pr_info("Disabling bearer <%s>\n", b_ptr->name);
402 b_ptr->media->disable_media(b_ptr);
404 tipc_link_delete_list(b_ptr->identity, shutting_down);
406 tipc_disc_delete(b_ptr->link_req);
408 for (i = 0; i < MAX_BEARERS; i++) {
409 if (b_ptr == rtnl_dereference(bearer_list[i])) {
410 RCU_INIT_POINTER(bearer_list[i], NULL);
414 kfree_rcu(b_ptr, rcu);
417 int tipc_disable_bearer(const char *name)
419 struct tipc_bearer *b_ptr;
422 b_ptr = tipc_bearer_find(name);
424 pr_warn("Attempt to disable unknown bearer <%s>\n", name);
427 bearer_disable(b_ptr, false);
433 int tipc_enable_l2_media(struct tipc_bearer *b)
435 struct net_device *dev;
436 char *driver_name = strchr((const char *)b->name, ':') + 1;
438 /* Find device with specified name */
439 dev = dev_get_by_name(&init_net, driver_name);
443 /* Associate TIPC bearer with L2 bearer */
444 rcu_assign_pointer(b->media_ptr, dev);
445 memset(&b->bcast_addr, 0, sizeof(b->bcast_addr));
446 memcpy(b->bcast_addr.value, dev->broadcast, b->media->hwaddr_len);
447 b->bcast_addr.media_id = b->media->type_id;
448 b->bcast_addr.broadcast = 1;
450 b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr);
451 rcu_assign_pointer(dev->tipc_ptr, b);
455 /* tipc_disable_l2_media - detach TIPC bearer from an L2 interface
457 * Mark L2 bearer as inactive so that incoming buffers are thrown away,
458 * then get worker thread to complete bearer cleanup. (Can't do cleanup
459 * here because cleanup code needs to sleep and caller holds spinlocks.)
461 void tipc_disable_l2_media(struct tipc_bearer *b)
463 struct net_device *dev;
465 dev = (struct net_device *)rtnl_dereference(b->media_ptr);
466 RCU_INIT_POINTER(b->media_ptr, NULL);
467 RCU_INIT_POINTER(dev->tipc_ptr, NULL);
473 * tipc_l2_send_msg - send a TIPC packet out over an L2 interface
474 * @buf: the packet to be sent
475 * @b_ptr: the bearer through which the packet is to be sent
476 * @dest: peer destination address
478 int tipc_l2_send_msg(struct sk_buff *buf, struct tipc_bearer *b,
479 struct tipc_media_addr *dest)
481 struct sk_buff *clone;
482 struct net_device *dev;
485 dev = (struct net_device *)rcu_dereference_rtnl(b->media_ptr);
489 clone = skb_clone(buf, GFP_ATOMIC);
493 delta = dev->hard_header_len - skb_headroom(buf);
495 pskb_expand_head(clone, SKB_DATA_ALIGN(delta), 0, GFP_ATOMIC)) {
500 skb_reset_network_header(clone);
502 clone->protocol = htons(ETH_P_TIPC);
503 dev_hard_header(clone, dev, ETH_P_TIPC, dest->value,
504 dev->dev_addr, clone->len);
505 dev_queue_xmit(clone);
509 /* tipc_bearer_send- sends buffer to destination over bearer
512 * The media send routine must not alter the buffer being passed in
513 * as it may be needed for later retransmission!
515 void tipc_bearer_send(u32 bearer_id, struct sk_buff *buf,
516 struct tipc_media_addr *dest)
518 struct tipc_bearer *b_ptr;
521 b_ptr = rcu_dereference_rtnl(bearer_list[bearer_id]);
523 b_ptr->media->send_msg(buf, b_ptr, dest);
528 * tipc_l2_rcv_msg - handle incoming TIPC message from an interface
529 * @buf: the received packet
530 * @dev: the net device that the packet was received on
531 * @pt: the packet_type structure which was used to register this handler
532 * @orig_dev: the original receive net device in case the device is a bond
534 * Accept only packets explicitly sent to this node, or broadcast packets;
535 * ignores packets sent using interface multicast, and traffic sent to other
536 * nodes (which can happen if interface is running in promiscuous mode).
538 static int tipc_l2_rcv_msg(struct sk_buff *buf, struct net_device *dev,
539 struct packet_type *pt, struct net_device *orig_dev)
541 struct tipc_bearer *b_ptr;
544 b_ptr = rcu_dereference_rtnl(dev->tipc_ptr);
546 if (likely(buf->pkt_type <= PACKET_BROADCAST)) {
548 tipc_rcv(dev_net(dev), buf, b_ptr);
550 return NET_RX_SUCCESS;
560 * tipc_l2_device_event - handle device events from network device
561 * @nb: the context of the notification
562 * @evt: the type of event
563 * @ptr: the net device that the event was on
565 * This function is called by the Ethernet driver in case of link
568 static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt,
571 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
572 struct net *net = dev_net(dev);
573 struct tipc_bearer *b_ptr;
575 b_ptr = rtnl_dereference(dev->tipc_ptr);
579 b_ptr->mtu = dev->mtu;
583 if (netif_carrier_ok(dev))
586 case NETDEV_CHANGEMTU:
587 tipc_reset_bearer(net, b_ptr);
589 case NETDEV_CHANGEADDR:
590 b_ptr->media->raw2addr(b_ptr, &b_ptr->addr,
591 (char *)dev->dev_addr);
592 tipc_reset_bearer(net, b_ptr);
594 case NETDEV_UNREGISTER:
595 case NETDEV_CHANGENAME:
596 bearer_disable(b_ptr, false);
602 static struct packet_type tipc_packet_type __read_mostly = {
603 .type = htons(ETH_P_TIPC),
604 .func = tipc_l2_rcv_msg,
607 static struct notifier_block notifier = {
608 .notifier_call = tipc_l2_device_event,
612 int tipc_bearer_setup(void)
616 err = register_netdevice_notifier(¬ifier);
619 dev_add_pack(&tipc_packet_type);
623 void tipc_bearer_cleanup(void)
625 unregister_netdevice_notifier(¬ifier);
626 dev_remove_pack(&tipc_packet_type);
629 void tipc_bearer_stop(void)
631 struct tipc_bearer *b_ptr;
634 for (i = 0; i < MAX_BEARERS; i++) {
635 b_ptr = rtnl_dereference(bearer_list[i]);
637 bearer_disable(b_ptr, true);
638 bearer_list[i] = NULL;
643 /* Caller should hold rtnl_lock to protect the bearer */
644 static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg,
645 struct tipc_bearer *bearer)
648 struct nlattr *attrs;
651 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_v2_family,
652 NLM_F_MULTI, TIPC_NL_BEARER_GET);
656 attrs = nla_nest_start(msg->skb, TIPC_NLA_BEARER);
660 if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name))
663 prop = nla_nest_start(msg->skb, TIPC_NLA_BEARER_PROP);
666 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority))
668 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance))
670 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window))
673 nla_nest_end(msg->skb, prop);
674 nla_nest_end(msg->skb, attrs);
675 genlmsg_end(msg->skb, hdr);
680 nla_nest_cancel(msg->skb, prop);
682 nla_nest_cancel(msg->skb, attrs);
684 genlmsg_cancel(msg->skb, hdr);
689 int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb)
693 struct tipc_bearer *bearer;
694 struct tipc_nl_msg msg;
696 if (i == MAX_BEARERS)
700 msg.portid = NETLINK_CB(cb->skb).portid;
701 msg.seq = cb->nlh->nlmsg_seq;
704 for (i = 0; i < MAX_BEARERS; i++) {
705 bearer = rtnl_dereference(bearer_list[i]);
709 err = __tipc_nl_add_bearer(&msg, bearer);
719 int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info)
724 struct tipc_bearer *bearer;
725 struct tipc_nl_msg msg;
726 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
728 if (!info->attrs[TIPC_NLA_BEARER])
731 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
732 info->attrs[TIPC_NLA_BEARER],
733 tipc_nl_bearer_policy);
737 if (!attrs[TIPC_NLA_BEARER_NAME])
739 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
741 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
746 msg.portid = info->snd_portid;
747 msg.seq = info->snd_seq;
750 bearer = tipc_bearer_find(name);
756 err = __tipc_nl_add_bearer(&msg, bearer);
761 return genlmsg_reply(rep, info);
769 int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info)
773 struct tipc_bearer *bearer;
774 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
776 if (!info->attrs[TIPC_NLA_BEARER])
779 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
780 info->attrs[TIPC_NLA_BEARER],
781 tipc_nl_bearer_policy);
785 if (!attrs[TIPC_NLA_BEARER_NAME])
788 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
791 bearer = tipc_bearer_find(name);
797 bearer_disable(bearer, false);
803 int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
805 struct net *net = genl_info_net(info);
808 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
812 prio = TIPC_MEDIA_LINK_PRI;
813 domain = tipc_own_addr & TIPC_CLUSTER_MASK;
815 if (!info->attrs[TIPC_NLA_BEARER])
818 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
819 info->attrs[TIPC_NLA_BEARER],
820 tipc_nl_bearer_policy);
824 if (!attrs[TIPC_NLA_BEARER_NAME])
827 bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
829 if (attrs[TIPC_NLA_BEARER_DOMAIN])
830 domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]);
832 if (attrs[TIPC_NLA_BEARER_PROP]) {
833 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
835 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
840 if (props[TIPC_NLA_PROP_PRIO])
841 prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
845 err = tipc_enable_bearer(net, bearer, domain, prio);
855 int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
859 struct tipc_bearer *b;
860 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
862 if (!info->attrs[TIPC_NLA_BEARER])
865 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
866 info->attrs[TIPC_NLA_BEARER],
867 tipc_nl_bearer_policy);
871 if (!attrs[TIPC_NLA_BEARER_NAME])
873 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
876 b = tipc_bearer_find(name);
882 if (attrs[TIPC_NLA_BEARER_PROP]) {
883 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
885 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
892 if (props[TIPC_NLA_PROP_TOL])
893 b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
894 if (props[TIPC_NLA_PROP_PRIO])
895 b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
896 if (props[TIPC_NLA_PROP_WIN])
897 b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
904 static int __tipc_nl_add_media(struct tipc_nl_msg *msg,
905 struct tipc_media *media)
908 struct nlattr *attrs;
911 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_v2_family,
912 NLM_F_MULTI, TIPC_NL_MEDIA_GET);
916 attrs = nla_nest_start(msg->skb, TIPC_NLA_MEDIA);
920 if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name))
923 prop = nla_nest_start(msg->skb, TIPC_NLA_MEDIA_PROP);
926 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority))
928 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance))
930 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window))
933 nla_nest_end(msg->skb, prop);
934 nla_nest_end(msg->skb, attrs);
935 genlmsg_end(msg->skb, hdr);
940 nla_nest_cancel(msg->skb, prop);
942 nla_nest_cancel(msg->skb, attrs);
944 genlmsg_cancel(msg->skb, hdr);
949 int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb)
953 struct tipc_nl_msg msg;
959 msg.portid = NETLINK_CB(cb->skb).portid;
960 msg.seq = cb->nlh->nlmsg_seq;
963 for (; media_info_array[i] != NULL; i++) {
964 err = __tipc_nl_add_media(&msg, media_info_array[i]);
974 int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info)
978 struct tipc_nl_msg msg;
979 struct tipc_media *media;
981 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
983 if (!info->attrs[TIPC_NLA_MEDIA])
986 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
987 info->attrs[TIPC_NLA_MEDIA],
988 tipc_nl_media_policy);
992 if (!attrs[TIPC_NLA_MEDIA_NAME])
994 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
996 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1001 msg.portid = info->snd_portid;
1002 msg.seq = info->snd_seq;
1005 media = tipc_media_find(name);
1011 err = __tipc_nl_add_media(&msg, media);
1016 return genlmsg_reply(rep, info);
1024 int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
1028 struct tipc_media *m;
1029 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1031 if (!info->attrs[TIPC_NLA_MEDIA])
1034 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
1035 info->attrs[TIPC_NLA_MEDIA],
1036 tipc_nl_media_policy);
1038 if (!attrs[TIPC_NLA_MEDIA_NAME])
1040 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1043 m = tipc_media_find(name);
1049 if (attrs[TIPC_NLA_MEDIA_PROP]) {
1050 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
1052 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP],
1059 if (props[TIPC_NLA_PROP_TOL])
1060 m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
1061 if (props[TIPC_NLA_PROP_PRIO])
1062 m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
1063 if (props[TIPC_NLA_PROP_WIN])
1064 m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);