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:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the names of the copyright holders nor the names of its
17 * contributors may be used to endorse or promote products derived from
18 * this software without specific prior written permission.
20 * Alternatively, this software may be distributed under the terms of the
21 * GNU General Public License ("GPL") version 2 as published by the Free
22 * Software Foundation.
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
34 * POSSIBILITY OF SUCH DAMAGE.
45 #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[],
235 struct netlink_ext_ack *extack)
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;
248 if (!bearer_name_validate(name, &b_names)) {
249 errstr = "illegal name";
250 NL_SET_ERR_MSG(extack, "Illegal name");
254 if (prio > TIPC_MAX_LINK_PRI && prio != TIPC_MEDIA_LINK_PRI) {
255 errstr = "illegal priority";
256 NL_SET_ERR_MSG(extack, "Illegal priority");
260 m = tipc_media_find(b_names.media_name);
262 errstr = "media not registered";
263 NL_SET_ERR_MSG(extack, "Media not registered");
267 if (prio == TIPC_MEDIA_LINK_PRI)
270 /* Check new bearer vs existing ones and find free bearer id if any */
271 bearer_id = MAX_BEARERS;
274 b = rtnl_dereference(tn->bearer_list[i]);
279 if (!strcmp(name, b->name)) {
280 errstr = "already enabled";
281 NL_SET_ERR_MSG(extack, "Already enabled");
285 if (b->priority == prio &&
286 (++with_this_prio > 2)) {
287 pr_warn("Bearer <%s>: already 2 bearers with priority %u\n",
290 if (prio == TIPC_MIN_LINK_PRI) {
291 errstr = "cannot adjust to lower";
292 NL_SET_ERR_MSG(extack, "Cannot adjust to lower");
296 pr_warn("Bearer <%s>: trying with adjusted priority\n",
299 bearer_id = MAX_BEARERS;
305 if (bearer_id >= MAX_BEARERS) {
306 errstr = "max 3 bearers permitted";
307 NL_SET_ERR_MSG(extack, "Max 3 bearers permitted");
311 b = kzalloc(sizeof(*b), GFP_ATOMIC);
315 strcpy(b->name, name);
317 res = m->enable_media(net, b, attr);
320 errstr = "failed to enable media";
321 NL_SET_ERR_MSG(extack, "Failed to enable media");
325 b->identity = bearer_id;
326 b->tolerance = m->tolerance;
327 b->window = m->window;
328 b->domain = disc_domain;
329 b->net_plane = bearer_id + 'A';
331 test_and_set_bit_lock(0, &b->up);
333 res = tipc_disc_create(net, b, &b->bcast_addr, &skb);
335 bearer_disable(net, b);
336 errstr = "failed to create discoverer";
337 NL_SET_ERR_MSG(extack, "Failed to create discoverer");
341 rcu_assign_pointer(tn->bearer_list[bearer_id], b);
343 tipc_bearer_xmit_skb(net, bearer_id, skb, &b->bcast_addr);
345 if (tipc_mon_create(net, bearer_id)) {
346 bearer_disable(net, b);
350 pr_info("Enabled bearer <%s>, priority %u\n", name, prio);
354 pr_warn("Enabling of bearer <%s> rejected, %s\n", name, errstr);
359 * tipc_reset_bearer - Reset all links established over this bearer
361 static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b)
363 pr_info("Resetting bearer <%s>\n", b->name);
364 tipc_node_delete_links(net, b->identity);
365 tipc_disc_reset(net, b);
372 * Note: This routine assumes caller holds RTNL lock.
374 static void bearer_disable(struct net *net, struct tipc_bearer *b)
376 struct tipc_net *tn = tipc_net(net);
377 int bearer_id = b->identity;
379 pr_info("Disabling bearer <%s>\n", b->name);
380 clear_bit_unlock(0, &b->up);
381 tipc_node_delete_links(net, bearer_id);
382 b->media->disable_media(b);
383 RCU_INIT_POINTER(b->media_ptr, NULL);
385 tipc_disc_delete(b->disc);
386 RCU_INIT_POINTER(tn->bearer_list[bearer_id], NULL);
388 tipc_mon_delete(net, bearer_id);
391 int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b,
392 struct nlattr *attr[])
394 char *dev_name = strchr((const char *)b->name, ':') + 1;
395 int hwaddr_len = b->media->hwaddr_len;
396 u8 node_id[NODE_ID_LEN] = {0,};
397 struct net_device *dev;
399 /* Find device with specified name */
400 dev = dev_get_by_name(net, dev_name);
403 if (tipc_mtu_bad(dev, 0)) {
408 /* Autoconfigure own node identity if needed */
409 if (!tipc_own_id(net) && hwaddr_len <= NODE_ID_LEN) {
410 memcpy(node_id, dev->dev_addr, hwaddr_len);
411 tipc_net_init(net, node_id, 0);
413 if (!tipc_own_id(net)) {
415 pr_warn("Failed to obtain node identity\n");
419 /* Associate TIPC bearer with L2 bearer */
420 rcu_assign_pointer(b->media_ptr, dev);
422 b->pt.type = htons(ETH_P_TIPC);
423 b->pt.func = tipc_l2_rcv_msg;
424 dev_add_pack(&b->pt);
425 memset(&b->bcast_addr, 0, sizeof(b->bcast_addr));
426 memcpy(b->bcast_addr.value, dev->broadcast, hwaddr_len);
427 b->bcast_addr.media_id = b->media->type_id;
428 b->bcast_addr.broadcast = TIPC_BROADCAST_SUPPORT;
430 b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr);
431 rcu_assign_pointer(dev->tipc_ptr, b);
435 /* tipc_disable_l2_media - detach TIPC bearer from an L2 interface
437 * Mark L2 bearer as inactive so that incoming buffers are thrown away
439 void tipc_disable_l2_media(struct tipc_bearer *b)
441 struct net_device *dev;
443 dev = (struct net_device *)rtnl_dereference(b->media_ptr);
444 dev_remove_pack(&b->pt);
445 RCU_INIT_POINTER(dev->tipc_ptr, NULL);
451 * tipc_l2_send_msg - send a TIPC packet out over an L2 interface
452 * @skb: the packet to be sent
453 * @b: the bearer through which the packet is to be sent
454 * @dest: peer destination address
456 int tipc_l2_send_msg(struct net *net, struct sk_buff *skb,
457 struct tipc_bearer *b, struct tipc_media_addr *dest)
459 struct net_device *dev;
462 dev = (struct net_device *)rcu_dereference_rtnl(b->media_ptr);
466 delta = SKB_DATA_ALIGN(dev->hard_header_len - skb_headroom(skb));
467 if ((delta > 0) && pskb_expand_head(skb, delta, 0, GFP_ATOMIC)) {
471 skb_reset_network_header(skb);
473 skb->protocol = htons(ETH_P_TIPC);
474 dev_hard_header(skb, dev, ETH_P_TIPC, dest->value,
475 dev->dev_addr, skb->len);
480 bool tipc_bearer_bcast_support(struct net *net, u32 bearer_id)
483 struct tipc_bearer *b;
486 b = bearer_get(net, bearer_id);
488 supp = (b->bcast_addr.broadcast == TIPC_BROADCAST_SUPPORT);
493 int tipc_bearer_mtu(struct net *net, u32 bearer_id)
496 struct tipc_bearer *b;
499 b = rcu_dereference_rtnl(tipc_net(net)->bearer_list[bearer_id]);
506 /* tipc_bearer_xmit_skb - sends buffer to destination over bearer
508 void tipc_bearer_xmit_skb(struct net *net, u32 bearer_id,
510 struct tipc_media_addr *dest)
512 struct tipc_msg *hdr = buf_msg(skb);
513 struct tipc_bearer *b;
516 b = bearer_get(net, bearer_id);
517 if (likely(b && (test_bit(0, &b->up) || msg_is_reset(hdr))))
518 b->media->send_msg(net, skb, b, dest);
524 /* tipc_bearer_xmit() -send buffer to destination over bearer
526 void tipc_bearer_xmit(struct net *net, u32 bearer_id,
527 struct sk_buff_head *xmitq,
528 struct tipc_media_addr *dst)
530 struct tipc_bearer *b;
531 struct sk_buff *skb, *tmp;
533 if (skb_queue_empty(xmitq))
537 b = bearer_get(net, bearer_id);
539 __skb_queue_purge(xmitq);
540 skb_queue_walk_safe(xmitq, skb, tmp) {
541 __skb_dequeue(xmitq);
542 if (likely(test_bit(0, &b->up) || msg_is_reset(buf_msg(skb))))
543 b->media->send_msg(net, skb, b, dst);
550 /* tipc_bearer_bc_xmit() - broadcast buffers to all destinations
552 void tipc_bearer_bc_xmit(struct net *net, u32 bearer_id,
553 struct sk_buff_head *xmitq)
555 struct tipc_net *tn = tipc_net(net);
556 int net_id = tn->net_id;
557 struct tipc_bearer *b;
558 struct sk_buff *skb, *tmp;
559 struct tipc_msg *hdr;
562 b = bearer_get(net, bearer_id);
563 if (unlikely(!b || !test_bit(0, &b->up)))
564 __skb_queue_purge(xmitq);
565 skb_queue_walk_safe(xmitq, skb, tmp) {
567 msg_set_non_seq(hdr, 1);
568 msg_set_mc_netid(hdr, net_id);
569 __skb_dequeue(xmitq);
570 b->media->send_msg(net, skb, b, &b->bcast_addr);
576 * tipc_l2_rcv_msg - handle incoming TIPC message from an interface
577 * @buf: the received packet
578 * @dev: the net device that the packet was received on
579 * @pt: the packet_type structure which was used to register this handler
580 * @orig_dev: the original receive net device in case the device is a bond
582 * Accept only packets explicitly sent to this node, or broadcast packets;
583 * ignores packets sent using interface multicast, and traffic sent to other
584 * nodes (which can happen if interface is running in promiscuous mode).
586 static int tipc_l2_rcv_msg(struct sk_buff *skb, struct net_device *dev,
587 struct packet_type *pt, struct net_device *orig_dev)
589 struct tipc_bearer *b;
592 b = rcu_dereference_rtnl(dev->tipc_ptr) ?:
593 rcu_dereference_rtnl(orig_dev->tipc_ptr);
594 if (likely(b && test_bit(0, &b->up) &&
595 (skb->pkt_type <= PACKET_MULTICAST))) {
597 tipc_rcv(dev_net(b->pt.dev), skb, b);
599 return NET_RX_SUCCESS;
607 * tipc_l2_device_event - handle device events from network device
608 * @nb: the context of the notification
609 * @evt: the type of event
610 * @ptr: the net device that the event was on
612 * This function is called by the Ethernet driver in case of link
615 static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt,
618 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
619 struct net *net = dev_net(dev);
620 struct tipc_bearer *b;
622 b = rtnl_dereference(dev->tipc_ptr);
628 if (netif_carrier_ok(dev) && netif_oper_up(dev)) {
629 test_and_set_bit_lock(0, &b->up);
633 case NETDEV_GOING_DOWN:
634 clear_bit_unlock(0, &b->up);
635 tipc_reset_bearer(net, b);
638 test_and_set_bit_lock(0, &b->up);
640 case NETDEV_CHANGEMTU:
641 if (tipc_mtu_bad(dev, 0)) {
642 bearer_disable(net, b);
646 tipc_reset_bearer(net, b);
648 case NETDEV_CHANGEADDR:
649 b->media->raw2addr(b, &b->addr,
650 (char *)dev->dev_addr);
651 tipc_reset_bearer(net, b);
653 case NETDEV_UNREGISTER:
654 case NETDEV_CHANGENAME:
655 bearer_disable(net, b);
661 static struct notifier_block notifier = {
662 .notifier_call = tipc_l2_device_event,
666 int tipc_bearer_setup(void)
668 return register_netdevice_notifier(¬ifier);
671 void tipc_bearer_cleanup(void)
673 unregister_netdevice_notifier(¬ifier);
676 void tipc_bearer_stop(struct net *net)
678 struct tipc_net *tn = net_generic(net, tipc_net_id);
679 struct tipc_bearer *b;
682 for (i = 0; i < MAX_BEARERS; i++) {
683 b = rtnl_dereference(tn->bearer_list[i]);
685 bearer_disable(net, b);
686 tn->bearer_list[i] = NULL;
691 /* Caller should hold rtnl_lock to protect the bearer */
692 static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg,
693 struct tipc_bearer *bearer, int nlflags)
696 struct nlattr *attrs;
699 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
700 nlflags, TIPC_NL_BEARER_GET);
704 attrs = nla_nest_start(msg->skb, TIPC_NLA_BEARER);
708 if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name))
711 prop = nla_nest_start(msg->skb, TIPC_NLA_BEARER_PROP);
714 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority))
716 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance))
718 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window))
720 if (bearer->media->type_id == TIPC_MEDIA_TYPE_UDP)
721 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_MTU, bearer->mtu))
724 nla_nest_end(msg->skb, prop);
726 #ifdef CONFIG_TIPC_MEDIA_UDP
727 if (bearer->media->type_id == TIPC_MEDIA_TYPE_UDP) {
728 if (tipc_udp_nl_add_bearer_data(msg, bearer))
733 nla_nest_end(msg->skb, attrs);
734 genlmsg_end(msg->skb, hdr);
739 nla_nest_cancel(msg->skb, prop);
741 nla_nest_cancel(msg->skb, attrs);
743 genlmsg_cancel(msg->skb, hdr);
748 int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb)
752 struct tipc_bearer *bearer;
753 struct tipc_nl_msg msg;
754 struct net *net = sock_net(skb->sk);
755 struct tipc_net *tn = net_generic(net, tipc_net_id);
757 if (i == MAX_BEARERS)
761 msg.portid = NETLINK_CB(cb->skb).portid;
762 msg.seq = cb->nlh->nlmsg_seq;
765 for (i = 0; i < MAX_BEARERS; i++) {
766 bearer = rtnl_dereference(tn->bearer_list[i]);
770 err = __tipc_nl_add_bearer(&msg, bearer, NLM_F_MULTI);
780 int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info)
785 struct tipc_bearer *bearer;
786 struct tipc_nl_msg msg;
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, info->extack);
799 if (!attrs[TIPC_NLA_BEARER_NAME])
801 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
803 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
808 msg.portid = info->snd_portid;
809 msg.seq = info->snd_seq;
812 bearer = tipc_bearer_find(net, name);
815 NL_SET_ERR_MSG(info->extack, "Bearer not found");
819 err = __tipc_nl_add_bearer(&msg, bearer, 0);
824 return genlmsg_reply(rep, info);
832 int __tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info)
836 struct tipc_bearer *bearer;
837 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
838 struct net *net = sock_net(skb->sk);
840 if (!info->attrs[TIPC_NLA_BEARER])
843 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
844 info->attrs[TIPC_NLA_BEARER],
845 tipc_nl_bearer_policy, info->extack);
849 if (!attrs[TIPC_NLA_BEARER_NAME])
852 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
854 bearer = tipc_bearer_find(net, name);
856 NL_SET_ERR_MSG(info->extack, "Bearer not found");
860 bearer_disable(net, bearer);
865 int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info)
870 err = __tipc_nl_bearer_disable(skb, info);
876 int __tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
880 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
881 struct net *net = sock_net(skb->sk);
885 prio = TIPC_MEDIA_LINK_PRI;
887 if (!info->attrs[TIPC_NLA_BEARER])
890 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
891 info->attrs[TIPC_NLA_BEARER],
892 tipc_nl_bearer_policy, info->extack);
896 if (!attrs[TIPC_NLA_BEARER_NAME])
899 bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
901 if (attrs[TIPC_NLA_BEARER_DOMAIN])
902 domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]);
904 if (attrs[TIPC_NLA_BEARER_PROP]) {
905 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
907 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
912 if (props[TIPC_NLA_PROP_PRIO])
913 prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
916 return tipc_enable_bearer(net, bearer, domain, prio, attrs,
920 int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
925 err = __tipc_nl_bearer_enable(skb, info);
931 int tipc_nl_bearer_add(struct sk_buff *skb, struct genl_info *info)
935 struct tipc_bearer *b;
936 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
937 struct net *net = sock_net(skb->sk);
939 if (!info->attrs[TIPC_NLA_BEARER])
942 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
943 info->attrs[TIPC_NLA_BEARER],
944 tipc_nl_bearer_policy, info->extack);
948 if (!attrs[TIPC_NLA_BEARER_NAME])
950 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
953 b = tipc_bearer_find(net, name);
956 NL_SET_ERR_MSG(info->extack, "Bearer not found");
960 #ifdef CONFIG_TIPC_MEDIA_UDP
961 if (attrs[TIPC_NLA_BEARER_UDP_OPTS]) {
962 err = tipc_udp_nl_bearer_add(b,
963 attrs[TIPC_NLA_BEARER_UDP_OPTS]);
975 int __tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
977 struct tipc_bearer *b;
978 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
979 struct net *net = sock_net(skb->sk);
983 if (!info->attrs[TIPC_NLA_BEARER])
986 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
987 info->attrs[TIPC_NLA_BEARER],
988 tipc_nl_bearer_policy, info->extack);
992 if (!attrs[TIPC_NLA_BEARER_NAME])
994 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
996 b = tipc_bearer_find(net, name);
998 NL_SET_ERR_MSG(info->extack, "Bearer not found");
1002 if (attrs[TIPC_NLA_BEARER_PROP]) {
1003 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
1005 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
1010 if (props[TIPC_NLA_PROP_TOL]) {
1011 b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
1012 tipc_node_apply_property(net, b, TIPC_NLA_PROP_TOL);
1014 if (props[TIPC_NLA_PROP_PRIO])
1015 b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
1016 if (props[TIPC_NLA_PROP_WIN])
1017 b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
1018 if (props[TIPC_NLA_PROP_MTU]) {
1019 if (b->media->type_id != TIPC_MEDIA_TYPE_UDP) {
1020 NL_SET_ERR_MSG(info->extack,
1021 "MTU property is unsupported");
1024 #ifdef CONFIG_TIPC_MEDIA_UDP
1025 if (tipc_udp_mtu_bad(nla_get_u32
1026 (props[TIPC_NLA_PROP_MTU]))) {
1027 NL_SET_ERR_MSG(info->extack,
1028 "MTU value is out-of-range");
1031 b->mtu = nla_get_u32(props[TIPC_NLA_PROP_MTU]);
1032 tipc_node_apply_property(net, b, TIPC_NLA_PROP_MTU);
1040 int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
1045 err = __tipc_nl_bearer_set(skb, info);
1051 static int __tipc_nl_add_media(struct tipc_nl_msg *msg,
1052 struct tipc_media *media, int nlflags)
1055 struct nlattr *attrs;
1056 struct nlattr *prop;
1058 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
1059 nlflags, TIPC_NL_MEDIA_GET);
1063 attrs = nla_nest_start(msg->skb, TIPC_NLA_MEDIA);
1067 if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name))
1070 prop = nla_nest_start(msg->skb, TIPC_NLA_MEDIA_PROP);
1073 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority))
1075 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance))
1077 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window))
1079 if (media->type_id == TIPC_MEDIA_TYPE_UDP)
1080 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_MTU, media->mtu))
1083 nla_nest_end(msg->skb, prop);
1084 nla_nest_end(msg->skb, attrs);
1085 genlmsg_end(msg->skb, hdr);
1090 nla_nest_cancel(msg->skb, prop);
1092 nla_nest_cancel(msg->skb, attrs);
1094 genlmsg_cancel(msg->skb, hdr);
1099 int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb)
1102 int i = cb->args[0];
1103 struct tipc_nl_msg msg;
1109 msg.portid = NETLINK_CB(cb->skb).portid;
1110 msg.seq = cb->nlh->nlmsg_seq;
1113 for (; media_info_array[i] != NULL; i++) {
1114 err = __tipc_nl_add_media(&msg, media_info_array[i],
1125 int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info)
1129 struct tipc_nl_msg msg;
1130 struct tipc_media *media;
1131 struct sk_buff *rep;
1132 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1134 if (!info->attrs[TIPC_NLA_MEDIA])
1137 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
1138 info->attrs[TIPC_NLA_MEDIA],
1139 tipc_nl_media_policy, info->extack);
1143 if (!attrs[TIPC_NLA_MEDIA_NAME])
1145 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1147 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1152 msg.portid = info->snd_portid;
1153 msg.seq = info->snd_seq;
1156 media = tipc_media_find(name);
1158 NL_SET_ERR_MSG(info->extack, "Media not found");
1163 err = __tipc_nl_add_media(&msg, media, 0);
1168 return genlmsg_reply(rep, info);
1176 int __tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
1180 struct tipc_media *m;
1181 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1183 if (!info->attrs[TIPC_NLA_MEDIA])
1186 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
1187 info->attrs[TIPC_NLA_MEDIA],
1188 tipc_nl_media_policy, info->extack);
1190 if (!attrs[TIPC_NLA_MEDIA_NAME])
1192 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1194 m = tipc_media_find(name);
1196 NL_SET_ERR_MSG(info->extack, "Media not found");
1199 if (attrs[TIPC_NLA_MEDIA_PROP]) {
1200 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
1202 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP],
1207 if (props[TIPC_NLA_PROP_TOL])
1208 m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
1209 if (props[TIPC_NLA_PROP_PRIO])
1210 m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
1211 if (props[TIPC_NLA_PROP_WIN])
1212 m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
1213 if (props[TIPC_NLA_PROP_MTU]) {
1214 if (m->type_id != TIPC_MEDIA_TYPE_UDP) {
1215 NL_SET_ERR_MSG(info->extack,
1216 "MTU property is unsupported");
1219 #ifdef CONFIG_TIPC_MEDIA_UDP
1220 if (tipc_udp_mtu_bad(nla_get_u32
1221 (props[TIPC_NLA_PROP_MTU]))) {
1222 NL_SET_ERR_MSG(info->extack,
1223 "MTU value is out-of-range");
1226 m->mtu = nla_get_u32(props[TIPC_NLA_PROP_MTU]);
1234 int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
1239 err = __tipc_nl_media_set(skb, info);