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.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
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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
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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 void 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,
118 "-%02x", a->value[i]);
123 * bearer_name_validate - validate & (optionally) deconstruct bearer name
124 * @name: ptr to bearer name string
125 * @name_parts: ptr to area for bearer name components (or NULL if not needed)
127 * Returns 1 if bearer name is valid, otherwise 0.
129 static int bearer_name_validate(const char *name,
130 struct tipc_bearer_names *name_parts)
132 char name_copy[TIPC_MAX_BEARER_NAME];
138 /* copy bearer name & ensure length is OK */
139 name_copy[TIPC_MAX_BEARER_NAME - 1] = 0;
140 /* need above in case non-Posix strncpy() doesn't pad with nulls */
141 strncpy(name_copy, name, TIPC_MAX_BEARER_NAME);
142 if (name_copy[TIPC_MAX_BEARER_NAME - 1] != 0)
145 /* ensure all component parts of bearer name are present */
146 media_name = name_copy;
147 if_name = strchr(media_name, ':');
151 media_len = if_name - media_name;
152 if_len = strlen(if_name) + 1;
154 /* validate component parts of bearer name */
155 if ((media_len <= 1) || (media_len > TIPC_MAX_MEDIA_NAME) ||
156 (if_len <= 1) || (if_len > TIPC_MAX_IF_NAME))
159 /* return bearer name components, if necessary */
161 strcpy(name_parts->media_name, media_name);
162 strcpy(name_parts->if_name, if_name);
168 * tipc_bearer_find - locates bearer object with matching bearer name
170 struct tipc_bearer *tipc_bearer_find(struct net *net, const char *name)
172 struct tipc_net *tn = net_generic(net, tipc_net_id);
173 struct tipc_bearer *b;
176 for (i = 0; i < MAX_BEARERS; i++) {
177 b = rtnl_dereference(tn->bearer_list[i]);
178 if (b && (!strcmp(b->name, name)))
184 /* tipc_bearer_get_name - get the bearer name from its id.
185 * @net: network namespace
186 * @name: a pointer to the buffer where the name will be stored.
187 * @bearer_id: the id to get the name from.
189 int tipc_bearer_get_name(struct net *net, char *name, u32 bearer_id)
191 struct tipc_net *tn = tipc_net(net);
192 struct tipc_bearer *b;
194 if (bearer_id >= MAX_BEARERS)
197 b = rtnl_dereference(tn->bearer_list[bearer_id]);
201 strcpy(name, b->name);
205 void tipc_bearer_add_dest(struct net *net, u32 bearer_id, u32 dest)
207 struct tipc_net *tn = net_generic(net, tipc_net_id);
208 struct tipc_bearer *b;
211 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
213 tipc_disc_add_dest(b->disc);
217 void tipc_bearer_remove_dest(struct net *net, u32 bearer_id, u32 dest)
219 struct tipc_net *tn = net_generic(net, tipc_net_id);
220 struct tipc_bearer *b;
223 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
225 tipc_disc_remove_dest(b->disc);
230 * tipc_enable_bearer - enable bearer with the given name
232 static int tipc_enable_bearer(struct net *net, const char *name,
233 u32 disc_domain, u32 prio,
234 struct nlattr *attr[])
236 struct tipc_net *tn = tipc_net(net);
237 struct tipc_bearer_names b_names;
238 int with_this_prio = 1;
239 struct tipc_bearer *b;
240 struct tipc_media *m;
246 if (!bearer_name_validate(name, &b_names)) {
247 errstr = "illegal name";
251 if (prio > TIPC_MAX_LINK_PRI && prio != TIPC_MEDIA_LINK_PRI) {
252 errstr = "illegal priority";
256 m = tipc_media_find(b_names.media_name);
258 errstr = "media not registered";
262 if (prio == TIPC_MEDIA_LINK_PRI)
265 /* Check new bearer vs existing ones and find free bearer id if any */
266 while (bearer_id < MAX_BEARERS) {
267 b = rtnl_dereference(tn->bearer_list[bearer_id]);
270 if (!strcmp(name, b->name)) {
271 errstr = "already enabled";
275 if (b->priority != prio)
277 if (++with_this_prio <= 2)
279 pr_warn("Bearer <%s>: already 2 bearers with priority %u\n",
281 if (prio == TIPC_MIN_LINK_PRI) {
282 errstr = "cannot adjust to lower";
285 pr_warn("Bearer <%s>: trying with adjusted priority\n", name);
291 if (bearer_id >= MAX_BEARERS) {
292 errstr = "max 3 bearers permitted";
296 b = kzalloc(sizeof(*b), GFP_ATOMIC);
300 strcpy(b->name, name);
302 res = m->enable_media(net, b, attr);
305 errstr = "failed to enable media";
309 b->identity = bearer_id;
310 b->tolerance = m->tolerance;
311 b->window = m->window;
312 b->domain = disc_domain;
313 b->net_plane = bearer_id + 'A';
315 test_and_set_bit_lock(0, &b->up);
317 res = tipc_disc_create(net, b, &b->bcast_addr, &skb);
319 bearer_disable(net, b);
321 errstr = "failed to create discoverer";
325 rcu_assign_pointer(tn->bearer_list[bearer_id], b);
327 tipc_bearer_xmit_skb(net, bearer_id, skb, &b->bcast_addr);
329 if (tipc_mon_create(net, bearer_id)) {
330 bearer_disable(net, b);
334 pr_info("Enabled bearer <%s>, priority %u\n", name, prio);
338 pr_warn("Enabling of bearer <%s> rejected, %s\n", name, errstr);
343 * tipc_reset_bearer - Reset all links established over this bearer
345 static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b)
347 pr_info("Resetting bearer <%s>\n", b->name);
348 tipc_node_delete_links(net, b->identity);
349 tipc_disc_reset(net, b);
356 * Note: This routine assumes caller holds RTNL lock.
358 static void bearer_disable(struct net *net, struct tipc_bearer *b)
360 struct tipc_net *tn = tipc_net(net);
361 int bearer_id = b->identity;
363 pr_info("Disabling bearer <%s>\n", b->name);
364 clear_bit_unlock(0, &b->up);
365 tipc_node_delete_links(net, bearer_id);
366 b->media->disable_media(b);
367 RCU_INIT_POINTER(b->media_ptr, NULL);
369 tipc_disc_delete(b->disc);
370 RCU_INIT_POINTER(tn->bearer_list[bearer_id], NULL);
372 tipc_mon_delete(net, bearer_id);
375 int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b,
376 struct nlattr *attr[])
378 char *dev_name = strchr((const char *)b->name, ':') + 1;
379 int hwaddr_len = b->media->hwaddr_len;
380 u8 node_id[NODE_ID_LEN] = {0,};
381 struct net_device *dev;
383 /* Find device with specified name */
384 dev = dev_get_by_name(net, dev_name);
387 if (tipc_mtu_bad(dev, 0)) {
392 /* Autoconfigure own node identity if needed */
393 if (!tipc_own_id(net) && hwaddr_len <= NODE_ID_LEN) {
394 memcpy(node_id, dev->dev_addr, hwaddr_len);
395 tipc_net_init(net, node_id, 0);
397 if (!tipc_own_id(net)) {
399 pr_warn("Failed to obtain node identity\n");
403 /* Associate TIPC bearer with L2 bearer */
404 rcu_assign_pointer(b->media_ptr, dev);
406 b->pt.type = htons(ETH_P_TIPC);
407 b->pt.func = tipc_l2_rcv_msg;
408 dev_add_pack(&b->pt);
409 memset(&b->bcast_addr, 0, sizeof(b->bcast_addr));
410 memcpy(b->bcast_addr.value, dev->broadcast, hwaddr_len);
411 b->bcast_addr.media_id = b->media->type_id;
412 b->bcast_addr.broadcast = TIPC_BROADCAST_SUPPORT;
414 b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr);
415 rcu_assign_pointer(dev->tipc_ptr, b);
419 /* tipc_disable_l2_media - detach TIPC bearer from an L2 interface
421 * Mark L2 bearer as inactive so that incoming buffers are thrown away
423 void tipc_disable_l2_media(struct tipc_bearer *b)
425 struct net_device *dev;
427 dev = (struct net_device *)rtnl_dereference(b->media_ptr);
428 dev_remove_pack(&b->pt);
429 RCU_INIT_POINTER(dev->tipc_ptr, NULL);
435 * tipc_l2_send_msg - send a TIPC packet out over an L2 interface
436 * @skb: the packet to be sent
437 * @b: the bearer through which the packet is to be sent
438 * @dest: peer destination address
440 int tipc_l2_send_msg(struct net *net, struct sk_buff *skb,
441 struct tipc_bearer *b, struct tipc_media_addr *dest)
443 struct net_device *dev;
446 dev = (struct net_device *)rcu_dereference_rtnl(b->media_ptr);
450 delta = SKB_DATA_ALIGN(dev->hard_header_len - skb_headroom(skb));
451 if ((delta > 0) && pskb_expand_head(skb, delta, 0, GFP_ATOMIC)) {
455 skb_reset_network_header(skb);
457 skb->protocol = htons(ETH_P_TIPC);
458 dev_hard_header(skb, dev, ETH_P_TIPC, dest->value,
459 dev->dev_addr, skb->len);
464 bool tipc_bearer_bcast_support(struct net *net, u32 bearer_id)
467 struct tipc_bearer *b;
470 b = bearer_get(net, bearer_id);
472 supp = (b->bcast_addr.broadcast == TIPC_BROADCAST_SUPPORT);
477 int tipc_bearer_mtu(struct net *net, u32 bearer_id)
480 struct tipc_bearer *b;
483 b = rcu_dereference_rtnl(tipc_net(net)->bearer_list[bearer_id]);
490 /* tipc_bearer_xmit_skb - sends buffer to destination over bearer
492 void tipc_bearer_xmit_skb(struct net *net, u32 bearer_id,
494 struct tipc_media_addr *dest)
496 struct tipc_msg *hdr = buf_msg(skb);
497 struct tipc_bearer *b;
500 b = bearer_get(net, bearer_id);
501 if (likely(b && (test_bit(0, &b->up) || msg_is_reset(hdr))))
502 b->media->send_msg(net, skb, b, dest);
508 /* tipc_bearer_xmit() -send buffer to destination over bearer
510 void tipc_bearer_xmit(struct net *net, u32 bearer_id,
511 struct sk_buff_head *xmitq,
512 struct tipc_media_addr *dst)
514 struct tipc_bearer *b;
515 struct sk_buff *skb, *tmp;
517 if (skb_queue_empty(xmitq))
521 b = bearer_get(net, bearer_id);
523 __skb_queue_purge(xmitq);
524 skb_queue_walk_safe(xmitq, skb, tmp) {
525 __skb_dequeue(xmitq);
526 if (likely(test_bit(0, &b->up) || msg_is_reset(buf_msg(skb))))
527 b->media->send_msg(net, skb, b, dst);
534 /* tipc_bearer_bc_xmit() - broadcast buffers to all destinations
536 void tipc_bearer_bc_xmit(struct net *net, u32 bearer_id,
537 struct sk_buff_head *xmitq)
539 struct tipc_net *tn = tipc_net(net);
540 int net_id = tn->net_id;
541 struct tipc_bearer *b;
542 struct sk_buff *skb, *tmp;
543 struct tipc_msg *hdr;
546 b = bearer_get(net, bearer_id);
547 if (unlikely(!b || !test_bit(0, &b->up)))
548 __skb_queue_purge(xmitq);
549 skb_queue_walk_safe(xmitq, skb, tmp) {
551 msg_set_non_seq(hdr, 1);
552 msg_set_mc_netid(hdr, net_id);
553 __skb_dequeue(xmitq);
554 b->media->send_msg(net, skb, b, &b->bcast_addr);
560 * tipc_l2_rcv_msg - handle incoming TIPC message from an interface
561 * @buf: the received packet
562 * @dev: the net device that the packet was received on
563 * @pt: the packet_type structure which was used to register this handler
564 * @orig_dev: the original receive net device in case the device is a bond
566 * Accept only packets explicitly sent to this node, or broadcast packets;
567 * ignores packets sent using interface multicast, and traffic sent to other
568 * nodes (which can happen if interface is running in promiscuous mode).
570 static int tipc_l2_rcv_msg(struct sk_buff *skb, struct net_device *dev,
571 struct packet_type *pt, struct net_device *orig_dev)
573 struct tipc_bearer *b;
576 b = rcu_dereference_rtnl(dev->tipc_ptr) ?:
577 rcu_dereference_rtnl(orig_dev->tipc_ptr);
578 if (likely(b && test_bit(0, &b->up) &&
579 (skb->pkt_type <= PACKET_MULTICAST))) {
580 skb_mark_not_on_list(skb);
581 tipc_rcv(dev_net(b->pt.dev), skb, b);
583 return NET_RX_SUCCESS;
591 * tipc_l2_device_event - handle device events from network device
592 * @nb: the context of the notification
593 * @evt: the type of event
594 * @ptr: the net device that the event was on
596 * This function is called by the Ethernet driver in case of link
599 static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt,
602 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
603 struct net *net = dev_net(dev);
604 struct tipc_bearer *b;
606 b = rtnl_dereference(dev->tipc_ptr);
612 if (netif_carrier_ok(dev) && netif_oper_up(dev)) {
613 test_and_set_bit_lock(0, &b->up);
617 case NETDEV_GOING_DOWN:
618 clear_bit_unlock(0, &b->up);
619 tipc_reset_bearer(net, b);
622 test_and_set_bit_lock(0, &b->up);
624 case NETDEV_CHANGEMTU:
625 if (tipc_mtu_bad(dev, 0)) {
626 bearer_disable(net, b);
630 tipc_reset_bearer(net, b);
632 case NETDEV_CHANGEADDR:
633 b->media->raw2addr(b, &b->addr,
634 (char *)dev->dev_addr);
635 tipc_reset_bearer(net, b);
637 case NETDEV_UNREGISTER:
638 case NETDEV_CHANGENAME:
639 bearer_disable(net, b);
645 static struct notifier_block notifier = {
646 .notifier_call = tipc_l2_device_event,
650 int tipc_bearer_setup(void)
652 return register_netdevice_notifier(¬ifier);
655 void tipc_bearer_cleanup(void)
657 unregister_netdevice_notifier(¬ifier);
660 void tipc_bearer_stop(struct net *net)
662 struct tipc_net *tn = net_generic(net, tipc_net_id);
663 struct tipc_bearer *b;
666 for (i = 0; i < MAX_BEARERS; i++) {
667 b = rtnl_dereference(tn->bearer_list[i]);
669 bearer_disable(net, b);
670 tn->bearer_list[i] = NULL;
675 /* Caller should hold rtnl_lock to protect the bearer */
676 static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg,
677 struct tipc_bearer *bearer, int nlflags)
680 struct nlattr *attrs;
683 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
684 nlflags, TIPC_NL_BEARER_GET);
688 attrs = nla_nest_start(msg->skb, TIPC_NLA_BEARER);
692 if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name))
695 prop = nla_nest_start(msg->skb, TIPC_NLA_BEARER_PROP);
698 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority))
700 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance))
702 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window))
704 if (bearer->media->type_id == TIPC_MEDIA_TYPE_UDP)
705 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_MTU, bearer->mtu))
708 nla_nest_end(msg->skb, prop);
710 #ifdef CONFIG_TIPC_MEDIA_UDP
711 if (bearer->media->type_id == TIPC_MEDIA_TYPE_UDP) {
712 if (tipc_udp_nl_add_bearer_data(msg, bearer))
717 nla_nest_end(msg->skb, attrs);
718 genlmsg_end(msg->skb, hdr);
723 nla_nest_cancel(msg->skb, prop);
725 nla_nest_cancel(msg->skb, attrs);
727 genlmsg_cancel(msg->skb, hdr);
732 int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb)
736 struct tipc_bearer *bearer;
737 struct tipc_nl_msg msg;
738 struct net *net = sock_net(skb->sk);
739 struct tipc_net *tn = net_generic(net, tipc_net_id);
741 if (i == MAX_BEARERS)
745 msg.portid = NETLINK_CB(cb->skb).portid;
746 msg.seq = cb->nlh->nlmsg_seq;
749 for (i = 0; i < MAX_BEARERS; i++) {
750 bearer = rtnl_dereference(tn->bearer_list[i]);
754 err = __tipc_nl_add_bearer(&msg, bearer, NLM_F_MULTI);
764 int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info)
769 struct tipc_bearer *bearer;
770 struct tipc_nl_msg msg;
771 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
772 struct net *net = genl_info_net(info);
774 if (!info->attrs[TIPC_NLA_BEARER])
777 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
778 info->attrs[TIPC_NLA_BEARER],
779 tipc_nl_bearer_policy, info->extack);
783 if (!attrs[TIPC_NLA_BEARER_NAME])
785 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
787 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
792 msg.portid = info->snd_portid;
793 msg.seq = info->snd_seq;
796 bearer = tipc_bearer_find(net, name);
802 err = __tipc_nl_add_bearer(&msg, bearer, 0);
807 return genlmsg_reply(rep, info);
815 int __tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info)
819 struct tipc_bearer *bearer;
820 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
821 struct net *net = sock_net(skb->sk);
823 if (!info->attrs[TIPC_NLA_BEARER])
826 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
827 info->attrs[TIPC_NLA_BEARER],
828 tipc_nl_bearer_policy, info->extack);
832 if (!attrs[TIPC_NLA_BEARER_NAME])
835 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
837 bearer = tipc_bearer_find(net, name);
841 bearer_disable(net, bearer);
846 int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info)
851 err = __tipc_nl_bearer_disable(skb, info);
857 int __tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
861 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
862 struct net *net = sock_net(skb->sk);
866 prio = TIPC_MEDIA_LINK_PRI;
868 if (!info->attrs[TIPC_NLA_BEARER])
871 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
872 info->attrs[TIPC_NLA_BEARER],
873 tipc_nl_bearer_policy, info->extack);
877 if (!attrs[TIPC_NLA_BEARER_NAME])
880 bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
882 if (attrs[TIPC_NLA_BEARER_DOMAIN])
883 domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]);
885 if (attrs[TIPC_NLA_BEARER_PROP]) {
886 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
888 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
893 if (props[TIPC_NLA_PROP_PRIO])
894 prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
897 return tipc_enable_bearer(net, bearer, domain, prio, attrs);
900 int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
905 err = __tipc_nl_bearer_enable(skb, info);
911 int tipc_nl_bearer_add(struct sk_buff *skb, struct genl_info *info)
915 struct tipc_bearer *b;
916 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
917 struct net *net = sock_net(skb->sk);
919 if (!info->attrs[TIPC_NLA_BEARER])
922 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
923 info->attrs[TIPC_NLA_BEARER],
924 tipc_nl_bearer_policy, info->extack);
928 if (!attrs[TIPC_NLA_BEARER_NAME])
930 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
933 b = tipc_bearer_find(net, name);
939 #ifdef CONFIG_TIPC_MEDIA_UDP
940 if (attrs[TIPC_NLA_BEARER_UDP_OPTS]) {
941 err = tipc_udp_nl_bearer_add(b,
942 attrs[TIPC_NLA_BEARER_UDP_OPTS]);
954 int __tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
956 struct tipc_bearer *b;
957 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
958 struct net *net = sock_net(skb->sk);
962 if (!info->attrs[TIPC_NLA_BEARER])
965 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
966 info->attrs[TIPC_NLA_BEARER],
967 tipc_nl_bearer_policy, info->extack);
971 if (!attrs[TIPC_NLA_BEARER_NAME])
973 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
975 b = tipc_bearer_find(net, name);
979 if (attrs[TIPC_NLA_BEARER_PROP]) {
980 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
982 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
987 if (props[TIPC_NLA_PROP_TOL]) {
988 b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
989 tipc_node_apply_property(net, b, TIPC_NLA_PROP_TOL);
991 if (props[TIPC_NLA_PROP_PRIO])
992 b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
993 if (props[TIPC_NLA_PROP_WIN])
994 b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
995 if (props[TIPC_NLA_PROP_MTU]) {
996 if (b->media->type_id != TIPC_MEDIA_TYPE_UDP)
998 #ifdef CONFIG_TIPC_MEDIA_UDP
999 if (tipc_udp_mtu_bad(nla_get_u32
1000 (props[TIPC_NLA_PROP_MTU])))
1002 b->mtu = nla_get_u32(props[TIPC_NLA_PROP_MTU]);
1003 tipc_node_apply_property(net, b, TIPC_NLA_PROP_MTU);
1011 int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
1016 err = __tipc_nl_bearer_set(skb, info);
1022 static int __tipc_nl_add_media(struct tipc_nl_msg *msg,
1023 struct tipc_media *media, int nlflags)
1026 struct nlattr *attrs;
1027 struct nlattr *prop;
1029 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
1030 nlflags, TIPC_NL_MEDIA_GET);
1034 attrs = nla_nest_start(msg->skb, TIPC_NLA_MEDIA);
1038 if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name))
1041 prop = nla_nest_start(msg->skb, TIPC_NLA_MEDIA_PROP);
1044 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority))
1046 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance))
1048 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window))
1050 if (media->type_id == TIPC_MEDIA_TYPE_UDP)
1051 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_MTU, media->mtu))
1054 nla_nest_end(msg->skb, prop);
1055 nla_nest_end(msg->skb, attrs);
1056 genlmsg_end(msg->skb, hdr);
1061 nla_nest_cancel(msg->skb, prop);
1063 nla_nest_cancel(msg->skb, attrs);
1065 genlmsg_cancel(msg->skb, hdr);
1070 int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb)
1073 int i = cb->args[0];
1074 struct tipc_nl_msg msg;
1080 msg.portid = NETLINK_CB(cb->skb).portid;
1081 msg.seq = cb->nlh->nlmsg_seq;
1084 for (; media_info_array[i] != NULL; i++) {
1085 err = __tipc_nl_add_media(&msg, media_info_array[i],
1096 int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info)
1100 struct tipc_nl_msg msg;
1101 struct tipc_media *media;
1102 struct sk_buff *rep;
1103 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1105 if (!info->attrs[TIPC_NLA_MEDIA])
1108 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
1109 info->attrs[TIPC_NLA_MEDIA],
1110 tipc_nl_media_policy, info->extack);
1114 if (!attrs[TIPC_NLA_MEDIA_NAME])
1116 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1118 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1123 msg.portid = info->snd_portid;
1124 msg.seq = info->snd_seq;
1127 media = tipc_media_find(name);
1133 err = __tipc_nl_add_media(&msg, media, 0);
1138 return genlmsg_reply(rep, info);
1146 int __tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
1150 struct tipc_media *m;
1151 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1153 if (!info->attrs[TIPC_NLA_MEDIA])
1156 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
1157 info->attrs[TIPC_NLA_MEDIA],
1158 tipc_nl_media_policy, info->extack);
1160 if (!attrs[TIPC_NLA_MEDIA_NAME])
1162 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1164 m = tipc_media_find(name);
1168 if (attrs[TIPC_NLA_MEDIA_PROP]) {
1169 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
1171 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP],
1176 if (props[TIPC_NLA_PROP_TOL])
1177 m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
1178 if (props[TIPC_NLA_PROP_PRIO])
1179 m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
1180 if (props[TIPC_NLA_PROP_WIN])
1181 m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
1182 if (props[TIPC_NLA_PROP_MTU]) {
1183 if (m->type_id != TIPC_MEDIA_TYPE_UDP)
1185 #ifdef CONFIG_TIPC_MEDIA_UDP
1186 if (tipc_udp_mtu_bad(nla_get_u32
1187 (props[TIPC_NLA_PROP_MTU])))
1189 m->mtu = nla_get_u32(props[TIPC_NLA_PROP_MTU]);
1197 int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
1202 err = __tipc_nl_media_set(skb, info);