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:
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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
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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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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 #include "udp_media.h"
47 #define MAX_ADDR_STR 60
49 static struct tipc_media * const media_info_array[] = {
51 #ifdef CONFIG_TIPC_MEDIA_IB
54 #ifdef CONFIG_TIPC_MEDIA_UDP
60 static struct tipc_bearer *bearer_get(struct net *net, int bearer_id)
62 struct tipc_net *tn = tipc_net(net);
64 return rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
67 static void bearer_disable(struct net *net, struct tipc_bearer *b);
68 static int tipc_l2_rcv_msg(struct sk_buff *skb, struct net_device *dev,
69 struct packet_type *pt, struct net_device *orig_dev);
72 * tipc_media_find - locates specified media object by name
74 struct tipc_media *tipc_media_find(const char *name)
78 for (i = 0; media_info_array[i] != NULL; i++) {
79 if (!strcmp(media_info_array[i]->name, name))
82 return media_info_array[i];
86 * media_find_id - locates specified media object by type identifier
88 static struct tipc_media *media_find_id(u8 type)
92 for (i = 0; media_info_array[i] != NULL; i++) {
93 if (media_info_array[i]->type_id == type)
96 return media_info_array[i];
100 * tipc_media_addr_printf - record media address in print buffer
102 int tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a)
104 char addr_str[MAX_ADDR_STR];
105 struct tipc_media *m;
108 m = media_find_id(a->media_id);
110 if (m && !m->addr2str(a, addr_str, sizeof(addr_str)))
111 ret = scnprintf(buf, len, "%s(%s)", m->name, addr_str);
115 ret = scnprintf(buf, len, "UNKNOWN(%u)", a->media_id);
116 for (i = 0; i < sizeof(a->value); i++)
117 ret += scnprintf(buf + ret, len - ret,
124 * bearer_name_validate - validate & (optionally) deconstruct bearer name
125 * @name: ptr to bearer name string
126 * @name_parts: ptr to area for bearer name components (or NULL if not needed)
128 * Returns 1 if bearer name is valid, otherwise 0.
130 static int bearer_name_validate(const char *name,
131 struct tipc_bearer_names *name_parts)
133 char name_copy[TIPC_MAX_BEARER_NAME];
139 /* copy bearer name & ensure length is OK */
140 name_copy[TIPC_MAX_BEARER_NAME - 1] = 0;
141 /* need above in case non-Posix strncpy() doesn't pad with nulls */
142 strncpy(name_copy, name, TIPC_MAX_BEARER_NAME);
143 if (name_copy[TIPC_MAX_BEARER_NAME - 1] != 0)
146 /* ensure all component parts of bearer name are present */
147 media_name = name_copy;
148 if_name = strchr(media_name, ':');
152 media_len = if_name - media_name;
153 if_len = strlen(if_name) + 1;
155 /* validate component parts of bearer name */
156 if ((media_len <= 1) || (media_len > TIPC_MAX_MEDIA_NAME) ||
157 (if_len <= 1) || (if_len > TIPC_MAX_IF_NAME))
160 /* return bearer name components, if necessary */
162 strcpy(name_parts->media_name, media_name);
163 strcpy(name_parts->if_name, if_name);
169 * tipc_bearer_find - locates bearer object with matching bearer name
171 struct tipc_bearer *tipc_bearer_find(struct net *net, const char *name)
173 struct tipc_net *tn = net_generic(net, tipc_net_id);
174 struct tipc_bearer *b;
177 for (i = 0; i < MAX_BEARERS; i++) {
178 b = rtnl_dereference(tn->bearer_list[i]);
179 if (b && (!strcmp(b->name, name)))
185 /* tipc_bearer_get_name - get the bearer name from its id.
186 * @net: network namespace
187 * @name: a pointer to the buffer where the name will be stored.
188 * @bearer_id: the id to get the name from.
190 int tipc_bearer_get_name(struct net *net, char *name, u32 bearer_id)
192 struct tipc_net *tn = tipc_net(net);
193 struct tipc_bearer *b;
195 if (bearer_id >= MAX_BEARERS)
198 b = rtnl_dereference(tn->bearer_list[bearer_id]);
202 strcpy(name, b->name);
206 void tipc_bearer_add_dest(struct net *net, u32 bearer_id, u32 dest)
208 struct tipc_net *tn = net_generic(net, tipc_net_id);
209 struct tipc_bearer *b;
212 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
214 tipc_disc_add_dest(b->disc);
218 void tipc_bearer_remove_dest(struct net *net, u32 bearer_id, u32 dest)
220 struct tipc_net *tn = net_generic(net, tipc_net_id);
221 struct tipc_bearer *b;
224 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
226 tipc_disc_remove_dest(b->disc);
231 * tipc_enable_bearer - enable bearer with the given name
233 static int tipc_enable_bearer(struct net *net, const char *name,
234 u32 disc_domain, u32 prio,
235 struct nlattr *attr[])
237 struct tipc_net *tn = tipc_net(net);
238 struct tipc_bearer_names b_names;
239 int with_this_prio = 1;
240 struct tipc_bearer *b;
241 struct tipc_media *m;
247 if (!bearer_name_validate(name, &b_names)) {
248 errstr = "illegal name";
252 if (prio > TIPC_MAX_LINK_PRI && prio != TIPC_MEDIA_LINK_PRI) {
253 errstr = "illegal priority";
257 m = tipc_media_find(b_names.media_name);
259 errstr = "media not registered";
263 if (prio == TIPC_MEDIA_LINK_PRI)
266 /* Check new bearer vs existing ones and find free bearer id if any */
267 while (bearer_id < MAX_BEARERS) {
268 b = rtnl_dereference(tn->bearer_list[bearer_id]);
271 if (!strcmp(name, b->name)) {
272 errstr = "already enabled";
276 if (b->priority != prio)
278 if (++with_this_prio <= 2)
280 pr_warn("Bearer <%s>: already 2 bearers with priority %u\n",
282 if (prio == TIPC_MIN_LINK_PRI) {
283 errstr = "cannot adjust to lower";
286 pr_warn("Bearer <%s>: trying with adjusted priority\n", name);
292 if (bearer_id >= MAX_BEARERS) {
293 errstr = "max 3 bearers permitted";
297 b = kzalloc(sizeof(*b), GFP_ATOMIC);
301 strcpy(b->name, name);
303 res = m->enable_media(net, b, attr);
306 errstr = "failed to enable media";
310 b->identity = bearer_id;
311 b->tolerance = m->tolerance;
312 b->window = m->window;
313 b->domain = disc_domain;
314 b->net_plane = bearer_id + 'A';
316 test_and_set_bit_lock(0, &b->up);
318 res = tipc_disc_create(net, b, &b->bcast_addr, &skb);
320 bearer_disable(net, b);
322 errstr = "failed to create discoverer";
326 rcu_assign_pointer(tn->bearer_list[bearer_id], b);
328 tipc_bearer_xmit_skb(net, bearer_id, skb, &b->bcast_addr);
330 if (tipc_mon_create(net, bearer_id)) {
331 bearer_disable(net, b);
335 pr_info("Enabled bearer <%s>, priority %u\n", name, prio);
339 pr_warn("Enabling of bearer <%s> rejected, %s\n", name, errstr);
344 * tipc_reset_bearer - Reset all links established over this bearer
346 static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b)
348 pr_info("Resetting bearer <%s>\n", b->name);
349 tipc_node_delete_links(net, b->identity);
350 tipc_disc_reset(net, b);
357 * Note: This routine assumes caller holds RTNL lock.
359 static void bearer_disable(struct net *net, struct tipc_bearer *b)
361 struct tipc_net *tn = tipc_net(net);
362 int bearer_id = b->identity;
364 pr_info("Disabling bearer <%s>\n", b->name);
365 clear_bit_unlock(0, &b->up);
366 tipc_node_delete_links(net, bearer_id);
367 b->media->disable_media(b);
368 RCU_INIT_POINTER(b->media_ptr, NULL);
370 tipc_disc_delete(b->disc);
371 RCU_INIT_POINTER(tn->bearer_list[bearer_id], NULL);
373 tipc_mon_delete(net, bearer_id);
376 int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b,
377 struct nlattr *attr[])
379 char *dev_name = strchr((const char *)b->name, ':') + 1;
380 int hwaddr_len = b->media->hwaddr_len;
381 u8 node_id[NODE_ID_LEN] = {0,};
382 struct net_device *dev;
384 /* Find device with specified name */
385 dev = dev_get_by_name(net, dev_name);
388 if (tipc_mtu_bad(dev, 0)) {
393 /* Autoconfigure own node identity if needed */
394 if (!tipc_own_id(net) && hwaddr_len <= NODE_ID_LEN) {
395 memcpy(node_id, dev->dev_addr, hwaddr_len);
396 tipc_net_init(net, node_id, 0);
398 if (!tipc_own_id(net)) {
400 pr_warn("Failed to obtain node identity\n");
404 /* Associate TIPC bearer with L2 bearer */
405 rcu_assign_pointer(b->media_ptr, dev);
407 b->pt.type = htons(ETH_P_TIPC);
408 b->pt.func = tipc_l2_rcv_msg;
409 dev_add_pack(&b->pt);
410 memset(&b->bcast_addr, 0, sizeof(b->bcast_addr));
411 memcpy(b->bcast_addr.value, dev->broadcast, hwaddr_len);
412 b->bcast_addr.media_id = b->media->type_id;
413 b->bcast_addr.broadcast = TIPC_BROADCAST_SUPPORT;
415 b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr);
416 rcu_assign_pointer(dev->tipc_ptr, b);
420 /* tipc_disable_l2_media - detach TIPC bearer from an L2 interface
422 * Mark L2 bearer as inactive so that incoming buffers are thrown away
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 dev_remove_pack(&b->pt);
430 RCU_INIT_POINTER(dev->tipc_ptr, NULL);
436 * tipc_l2_send_msg - send a TIPC packet out over an L2 interface
437 * @skb: the packet to be sent
438 * @b: 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 *skb,
442 struct tipc_bearer *b, struct tipc_media_addr *dest)
444 struct net_device *dev;
447 dev = (struct net_device *)rcu_dereference_rtnl(b->media_ptr);
451 delta = SKB_DATA_ALIGN(dev->hard_header_len - skb_headroom(skb));
452 if ((delta > 0) && pskb_expand_head(skb, delta, 0, GFP_ATOMIC)) {
456 skb_reset_network_header(skb);
458 skb->protocol = htons(ETH_P_TIPC);
459 dev_hard_header(skb, dev, ETH_P_TIPC, dest->value,
460 dev->dev_addr, skb->len);
465 bool tipc_bearer_bcast_support(struct net *net, u32 bearer_id)
468 struct tipc_bearer *b;
471 b = bearer_get(net, bearer_id);
473 supp = (b->bcast_addr.broadcast == TIPC_BROADCAST_SUPPORT);
478 int tipc_bearer_mtu(struct net *net, u32 bearer_id)
481 struct tipc_bearer *b;
484 b = rcu_dereference_rtnl(tipc_net(net)->bearer_list[bearer_id]);
491 /* tipc_bearer_xmit_skb - sends buffer to destination over bearer
493 void tipc_bearer_xmit_skb(struct net *net, u32 bearer_id,
495 struct tipc_media_addr *dest)
497 struct tipc_msg *hdr = buf_msg(skb);
498 struct tipc_bearer *b;
501 b = bearer_get(net, bearer_id);
502 if (likely(b && (test_bit(0, &b->up) || msg_is_reset(hdr))))
503 b->media->send_msg(net, skb, b, dest);
509 /* tipc_bearer_xmit() -send buffer to destination over bearer
511 void tipc_bearer_xmit(struct net *net, u32 bearer_id,
512 struct sk_buff_head *xmitq,
513 struct tipc_media_addr *dst)
515 struct tipc_bearer *b;
516 struct sk_buff *skb, *tmp;
518 if (skb_queue_empty(xmitq))
522 b = bearer_get(net, bearer_id);
524 __skb_queue_purge(xmitq);
525 skb_queue_walk_safe(xmitq, skb, tmp) {
526 __skb_dequeue(xmitq);
527 if (likely(test_bit(0, &b->up) || msg_is_reset(buf_msg(skb))))
528 b->media->send_msg(net, skb, b, dst);
535 /* tipc_bearer_bc_xmit() - broadcast buffers to all destinations
537 void tipc_bearer_bc_xmit(struct net *net, u32 bearer_id,
538 struct sk_buff_head *xmitq)
540 struct tipc_net *tn = tipc_net(net);
541 int net_id = tn->net_id;
542 struct tipc_bearer *b;
543 struct sk_buff *skb, *tmp;
544 struct tipc_msg *hdr;
547 b = bearer_get(net, bearer_id);
548 if (unlikely(!b || !test_bit(0, &b->up)))
549 __skb_queue_purge(xmitq);
550 skb_queue_walk_safe(xmitq, skb, tmp) {
552 msg_set_non_seq(hdr, 1);
553 msg_set_mc_netid(hdr, net_id);
554 __skb_dequeue(xmitq);
555 b->media->send_msg(net, skb, b, &b->bcast_addr);
561 * tipc_l2_rcv_msg - handle incoming TIPC message from an interface
562 * @buf: the received packet
563 * @dev: the net device that the packet was received on
564 * @pt: the packet_type structure which was used to register this handler
565 * @orig_dev: the original receive net device in case the device is a bond
567 * Accept only packets explicitly sent to this node, or broadcast packets;
568 * ignores packets sent using interface multicast, and traffic sent to other
569 * nodes (which can happen if interface is running in promiscuous mode).
571 static int tipc_l2_rcv_msg(struct sk_buff *skb, struct net_device *dev,
572 struct packet_type *pt, struct net_device *orig_dev)
574 struct tipc_bearer *b;
577 b = rcu_dereference_rtnl(dev->tipc_ptr) ?:
578 rcu_dereference_rtnl(orig_dev->tipc_ptr);
579 if (likely(b && test_bit(0, &b->up) &&
580 (skb->pkt_type <= PACKET_MULTICAST))) {
581 skb_mark_not_on_list(skb);
582 tipc_rcv(dev_net(b->pt.dev), skb, b);
584 return NET_RX_SUCCESS;
592 * tipc_l2_device_event - handle device events from network device
593 * @nb: the context of the notification
594 * @evt: the type of event
595 * @ptr: the net device that the event was on
597 * This function is called by the Ethernet driver in case of link
600 static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt,
603 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
604 struct net *net = dev_net(dev);
605 struct tipc_bearer *b;
607 b = rtnl_dereference(dev->tipc_ptr);
613 if (netif_carrier_ok(dev) && netif_oper_up(dev)) {
614 test_and_set_bit_lock(0, &b->up);
618 case NETDEV_GOING_DOWN:
619 clear_bit_unlock(0, &b->up);
620 tipc_reset_bearer(net, b);
623 test_and_set_bit_lock(0, &b->up);
625 case NETDEV_CHANGEMTU:
626 if (tipc_mtu_bad(dev, 0)) {
627 bearer_disable(net, b);
631 tipc_reset_bearer(net, b);
633 case NETDEV_CHANGEADDR:
634 b->media->raw2addr(b, &b->addr,
635 (char *)dev->dev_addr);
636 tipc_reset_bearer(net, b);
638 case NETDEV_UNREGISTER:
639 case NETDEV_CHANGENAME:
640 bearer_disable(net, b);
646 static struct notifier_block notifier = {
647 .notifier_call = tipc_l2_device_event,
651 int tipc_bearer_setup(void)
653 return register_netdevice_notifier(¬ifier);
656 void tipc_bearer_cleanup(void)
658 unregister_netdevice_notifier(¬ifier);
661 void tipc_bearer_stop(struct net *net)
663 struct tipc_net *tn = net_generic(net, tipc_net_id);
664 struct tipc_bearer *b;
667 for (i = 0; i < MAX_BEARERS; i++) {
668 b = rtnl_dereference(tn->bearer_list[i]);
670 bearer_disable(net, b);
671 tn->bearer_list[i] = NULL;
676 /* Caller should hold rtnl_lock to protect the bearer */
677 static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg,
678 struct tipc_bearer *bearer, int nlflags)
681 struct nlattr *attrs;
684 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
685 nlflags, TIPC_NL_BEARER_GET);
689 attrs = nla_nest_start(msg->skb, TIPC_NLA_BEARER);
693 if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name))
696 prop = nla_nest_start(msg->skb, TIPC_NLA_BEARER_PROP);
699 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority))
701 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance))
703 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window))
705 if (bearer->media->type_id == TIPC_MEDIA_TYPE_UDP)
706 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_MTU, bearer->mtu))
709 nla_nest_end(msg->skb, prop);
711 #ifdef CONFIG_TIPC_MEDIA_UDP
712 if (bearer->media->type_id == TIPC_MEDIA_TYPE_UDP) {
713 if (tipc_udp_nl_add_bearer_data(msg, bearer))
718 nla_nest_end(msg->skb, attrs);
719 genlmsg_end(msg->skb, hdr);
724 nla_nest_cancel(msg->skb, prop);
726 nla_nest_cancel(msg->skb, attrs);
728 genlmsg_cancel(msg->skb, hdr);
733 int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb)
737 struct tipc_bearer *bearer;
738 struct tipc_nl_msg msg;
739 struct net *net = sock_net(skb->sk);
740 struct tipc_net *tn = net_generic(net, tipc_net_id);
742 if (i == MAX_BEARERS)
746 msg.portid = NETLINK_CB(cb->skb).portid;
747 msg.seq = cb->nlh->nlmsg_seq;
750 for (i = 0; i < MAX_BEARERS; i++) {
751 bearer = rtnl_dereference(tn->bearer_list[i]);
755 err = __tipc_nl_add_bearer(&msg, bearer, NLM_F_MULTI);
765 int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info)
770 struct tipc_bearer *bearer;
771 struct tipc_nl_msg msg;
772 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
773 struct net *net = genl_info_net(info);
775 if (!info->attrs[TIPC_NLA_BEARER])
778 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
779 info->attrs[TIPC_NLA_BEARER],
780 tipc_nl_bearer_policy, info->extack);
784 if (!attrs[TIPC_NLA_BEARER_NAME])
786 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
788 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
793 msg.portid = info->snd_portid;
794 msg.seq = info->snd_seq;
797 bearer = tipc_bearer_find(net, name);
803 err = __tipc_nl_add_bearer(&msg, bearer, 0);
808 return genlmsg_reply(rep, info);
816 int __tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info)
820 struct tipc_bearer *bearer;
821 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
822 struct net *net = sock_net(skb->sk);
824 if (!info->attrs[TIPC_NLA_BEARER])
827 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
828 info->attrs[TIPC_NLA_BEARER],
829 tipc_nl_bearer_policy, info->extack);
833 if (!attrs[TIPC_NLA_BEARER_NAME])
836 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
838 bearer = tipc_bearer_find(net, name);
842 bearer_disable(net, bearer);
847 int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info)
852 err = __tipc_nl_bearer_disable(skb, info);
858 int __tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
862 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
863 struct net *net = sock_net(skb->sk);
867 prio = TIPC_MEDIA_LINK_PRI;
869 if (!info->attrs[TIPC_NLA_BEARER])
872 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
873 info->attrs[TIPC_NLA_BEARER],
874 tipc_nl_bearer_policy, info->extack);
878 if (!attrs[TIPC_NLA_BEARER_NAME])
881 bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
883 if (attrs[TIPC_NLA_BEARER_DOMAIN])
884 domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]);
886 if (attrs[TIPC_NLA_BEARER_PROP]) {
887 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
889 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
894 if (props[TIPC_NLA_PROP_PRIO])
895 prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
898 return tipc_enable_bearer(net, bearer, domain, prio, attrs);
901 int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
906 err = __tipc_nl_bearer_enable(skb, info);
912 int tipc_nl_bearer_add(struct sk_buff *skb, struct genl_info *info)
916 struct tipc_bearer *b;
917 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
918 struct net *net = sock_net(skb->sk);
920 if (!info->attrs[TIPC_NLA_BEARER])
923 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
924 info->attrs[TIPC_NLA_BEARER],
925 tipc_nl_bearer_policy, info->extack);
929 if (!attrs[TIPC_NLA_BEARER_NAME])
931 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
934 b = tipc_bearer_find(net, name);
940 #ifdef CONFIG_TIPC_MEDIA_UDP
941 if (attrs[TIPC_NLA_BEARER_UDP_OPTS]) {
942 err = tipc_udp_nl_bearer_add(b,
943 attrs[TIPC_NLA_BEARER_UDP_OPTS]);
955 int __tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
957 struct tipc_bearer *b;
958 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
959 struct net *net = sock_net(skb->sk);
963 if (!info->attrs[TIPC_NLA_BEARER])
966 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
967 info->attrs[TIPC_NLA_BEARER],
968 tipc_nl_bearer_policy, info->extack);
972 if (!attrs[TIPC_NLA_BEARER_NAME])
974 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
976 b = tipc_bearer_find(net, name);
980 if (attrs[TIPC_NLA_BEARER_PROP]) {
981 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
983 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
988 if (props[TIPC_NLA_PROP_TOL]) {
989 b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
990 tipc_node_apply_property(net, b, TIPC_NLA_PROP_TOL);
992 if (props[TIPC_NLA_PROP_PRIO])
993 b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
994 if (props[TIPC_NLA_PROP_WIN])
995 b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
996 if (props[TIPC_NLA_PROP_MTU]) {
997 if (b->media->type_id != TIPC_MEDIA_TYPE_UDP)
999 #ifdef CONFIG_TIPC_MEDIA_UDP
1000 if (tipc_udp_mtu_bad(nla_get_u32
1001 (props[TIPC_NLA_PROP_MTU])))
1003 b->mtu = nla_get_u32(props[TIPC_NLA_PROP_MTU]);
1004 tipc_node_apply_property(net, b, TIPC_NLA_PROP_MTU);
1012 int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
1017 err = __tipc_nl_bearer_set(skb, info);
1023 static int __tipc_nl_add_media(struct tipc_nl_msg *msg,
1024 struct tipc_media *media, int nlflags)
1027 struct nlattr *attrs;
1028 struct nlattr *prop;
1030 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
1031 nlflags, TIPC_NL_MEDIA_GET);
1035 attrs = nla_nest_start(msg->skb, TIPC_NLA_MEDIA);
1039 if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name))
1042 prop = nla_nest_start(msg->skb, TIPC_NLA_MEDIA_PROP);
1045 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority))
1047 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance))
1049 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window))
1051 if (media->type_id == TIPC_MEDIA_TYPE_UDP)
1052 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_MTU, media->mtu))
1055 nla_nest_end(msg->skb, prop);
1056 nla_nest_end(msg->skb, attrs);
1057 genlmsg_end(msg->skb, hdr);
1062 nla_nest_cancel(msg->skb, prop);
1064 nla_nest_cancel(msg->skb, attrs);
1066 genlmsg_cancel(msg->skb, hdr);
1071 int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb)
1074 int i = cb->args[0];
1075 struct tipc_nl_msg msg;
1081 msg.portid = NETLINK_CB(cb->skb).portid;
1082 msg.seq = cb->nlh->nlmsg_seq;
1085 for (; media_info_array[i] != NULL; i++) {
1086 err = __tipc_nl_add_media(&msg, media_info_array[i],
1097 int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info)
1101 struct tipc_nl_msg msg;
1102 struct tipc_media *media;
1103 struct sk_buff *rep;
1104 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1106 if (!info->attrs[TIPC_NLA_MEDIA])
1109 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
1110 info->attrs[TIPC_NLA_MEDIA],
1111 tipc_nl_media_policy, info->extack);
1115 if (!attrs[TIPC_NLA_MEDIA_NAME])
1117 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1119 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1124 msg.portid = info->snd_portid;
1125 msg.seq = info->snd_seq;
1128 media = tipc_media_find(name);
1134 err = __tipc_nl_add_media(&msg, media, 0);
1139 return genlmsg_reply(rep, info);
1147 int __tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
1151 struct tipc_media *m;
1152 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1154 if (!info->attrs[TIPC_NLA_MEDIA])
1157 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
1158 info->attrs[TIPC_NLA_MEDIA],
1159 tipc_nl_media_policy, info->extack);
1161 if (!attrs[TIPC_NLA_MEDIA_NAME])
1163 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1165 m = tipc_media_find(name);
1169 if (attrs[TIPC_NLA_MEDIA_PROP]) {
1170 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
1172 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP],
1177 if (props[TIPC_NLA_PROP_TOL])
1178 m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
1179 if (props[TIPC_NLA_PROP_PRIO])
1180 m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
1181 if (props[TIPC_NLA_PROP_WIN])
1182 m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
1183 if (props[TIPC_NLA_PROP_MTU]) {
1184 if (m->type_id != TIPC_MEDIA_TYPE_UDP)
1186 #ifdef CONFIG_TIPC_MEDIA_UDP
1187 if (tipc_udp_mtu_bad(nla_get_u32
1188 (props[TIPC_NLA_PROP_MTU])))
1190 m->mtu = nla_get_u32(props[TIPC_NLA_PROP_MTU]);
1198 int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
1203 err = __tipc_nl_media_set(skb, info);