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
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31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
34 * POSSIBILITY OF SUCH DAMAGE.
45 #include "udp_media.h"
49 #define MAX_ADDR_STR 60
51 static struct tipc_media * const media_info_array[] = {
53 #ifdef CONFIG_TIPC_MEDIA_IB
56 #ifdef CONFIG_TIPC_MEDIA_UDP
62 static struct tipc_bearer *bearer_get(struct net *net, int bearer_id)
64 struct tipc_net *tn = tipc_net(net);
66 return rcu_dereference(tn->bearer_list[bearer_id]);
69 static void bearer_disable(struct net *net, struct tipc_bearer *b);
70 static int tipc_l2_rcv_msg(struct sk_buff *skb, struct net_device *dev,
71 struct packet_type *pt, struct net_device *orig_dev);
74 * tipc_media_find - locates specified media object by name
75 * @name: name to locate
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
90 * @type: type identifier to locate
92 static struct tipc_media *media_find_id(u8 type)
96 for (i = 0; media_info_array[i] != NULL; i++) {
97 if (media_info_array[i]->type_id == type)
100 return media_info_array[i];
104 * tipc_media_addr_printf - record media address in print buffer
105 * @buf: output buffer
106 * @len: output buffer size remaining
107 * @a: input media address
109 int tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a)
111 char addr_str[MAX_ADDR_STR];
112 struct tipc_media *m;
115 m = media_find_id(a->media_id);
117 if (m && !m->addr2str(a, addr_str, sizeof(addr_str)))
118 ret = scnprintf(buf, len, "%s(%s)", m->name, addr_str);
122 ret = scnprintf(buf, len, "UNKNOWN(%u)", a->media_id);
123 for (i = 0; i < sizeof(a->value); i++)
124 ret += scnprintf(buf + ret, len - ret,
131 * bearer_name_validate - validate & (optionally) deconstruct bearer name
132 * @name: ptr to bearer name string
133 * @name_parts: ptr to area for bearer name components (or NULL if not needed)
135 * Return: 1 if bearer name is valid, otherwise 0.
137 static int bearer_name_validate(const char *name,
138 struct tipc_bearer_names *name_parts)
140 char name_copy[TIPC_MAX_BEARER_NAME];
146 /* copy bearer name & ensure length is OK */
147 if (strscpy(name_copy, name, TIPC_MAX_BEARER_NAME) < 0)
150 /* ensure all component parts of bearer name are present */
151 media_name = name_copy;
152 if_name = strchr(media_name, ':');
156 media_len = if_name - media_name;
157 if_len = strlen(if_name) + 1;
159 /* validate component parts of bearer name */
160 if ((media_len <= 1) || (media_len > TIPC_MAX_MEDIA_NAME) ||
161 (if_len <= 1) || (if_len > TIPC_MAX_IF_NAME))
164 /* return bearer name components, if necessary */
166 strcpy(name_parts->media_name, media_name);
167 strcpy(name_parts->if_name, if_name);
173 * tipc_bearer_find - locates bearer object with matching bearer name
174 * @net: the applicable net namespace
175 * @name: bearer name to locate
177 struct tipc_bearer *tipc_bearer_find(struct net *net, const char *name)
179 struct tipc_net *tn = net_generic(net, tipc_net_id);
180 struct tipc_bearer *b;
183 for (i = 0; i < MAX_BEARERS; i++) {
184 b = rtnl_dereference(tn->bearer_list[i]);
185 if (b && (!strcmp(b->name, name)))
191 /* tipc_bearer_get_name - get the bearer name from its id.
192 * @net: network namespace
193 * @name: a pointer to the buffer where the name will be stored.
194 * @bearer_id: the id to get the name from.
196 int tipc_bearer_get_name(struct net *net, char *name, u32 bearer_id)
198 struct tipc_net *tn = tipc_net(net);
199 struct tipc_bearer *b;
201 if (bearer_id >= MAX_BEARERS)
204 b = rtnl_dereference(tn->bearer_list[bearer_id]);
208 strcpy(name, b->name);
212 void tipc_bearer_add_dest(struct net *net, u32 bearer_id, u32 dest)
214 struct tipc_net *tn = net_generic(net, tipc_net_id);
215 struct tipc_bearer *b;
218 b = rcu_dereference(tn->bearer_list[bearer_id]);
220 tipc_disc_add_dest(b->disc);
224 void tipc_bearer_remove_dest(struct net *net, u32 bearer_id, u32 dest)
226 struct tipc_net *tn = net_generic(net, tipc_net_id);
227 struct tipc_bearer *b;
230 b = rcu_dereference(tn->bearer_list[bearer_id]);
232 tipc_disc_remove_dest(b->disc);
237 * tipc_enable_bearer - enable bearer with the given name
238 * @net: the applicable net namespace
239 * @name: bearer name to enable
240 * @disc_domain: bearer domain
241 * @prio: bearer priority
242 * @attr: nlattr array
243 * @extack: netlink extended ack
245 static int tipc_enable_bearer(struct net *net, const char *name,
246 u32 disc_domain, u32 prio,
247 struct nlattr *attr[],
248 struct netlink_ext_ack *extack)
250 struct tipc_net *tn = tipc_net(net);
251 struct tipc_bearer_names b_names;
252 int with_this_prio = 1;
253 struct tipc_bearer *b;
254 struct tipc_media *m;
261 if (!bearer_name_validate(name, &b_names)) {
262 errstr = "illegal name";
263 NL_SET_ERR_MSG(extack, "Illegal name");
267 if (prio > TIPC_MAX_LINK_PRI && prio != TIPC_MEDIA_LINK_PRI) {
268 errstr = "illegal priority";
269 NL_SET_ERR_MSG(extack, "Illegal priority");
273 m = tipc_media_find(b_names.media_name);
275 errstr = "media not registered";
276 NL_SET_ERR_MSG(extack, "Media not registered");
280 if (prio == TIPC_MEDIA_LINK_PRI)
283 /* Check new bearer vs existing ones and find free bearer id if any */
284 bearer_id = MAX_BEARERS;
287 b = rtnl_dereference(tn->bearer_list[i]);
292 if (!strcmp(name, b->name)) {
293 errstr = "already enabled";
294 NL_SET_ERR_MSG(extack, "Already enabled");
298 if (b->priority == prio &&
299 (++with_this_prio > 2)) {
300 pr_warn("Bearer <%s>: already 2 bearers with priority %u\n",
303 if (prio == TIPC_MIN_LINK_PRI) {
304 errstr = "cannot adjust to lower";
305 NL_SET_ERR_MSG(extack, "Cannot adjust to lower");
309 pr_warn("Bearer <%s>: trying with adjusted priority\n",
312 bearer_id = MAX_BEARERS;
318 if (bearer_id >= MAX_BEARERS) {
319 errstr = "max 3 bearers permitted";
320 NL_SET_ERR_MSG(extack, "Max 3 bearers permitted");
324 b = kzalloc(sizeof(*b), GFP_ATOMIC);
328 strcpy(b->name, name);
330 res = m->enable_media(net, b, attr);
333 errstr = "failed to enable media";
334 NL_SET_ERR_MSG(extack, "Failed to enable media");
338 b->identity = bearer_id;
339 b->tolerance = m->tolerance;
340 b->min_win = m->min_win;
341 b->max_win = m->max_win;
342 b->domain = disc_domain;
343 b->net_plane = bearer_id + 'A';
345 refcount_set(&b->refcnt, 1);
347 res = tipc_disc_create(net, b, &b->bcast_addr, &skb);
349 bearer_disable(net, b);
350 errstr = "failed to create discoverer";
351 NL_SET_ERR_MSG(extack, "Failed to create discoverer");
355 test_and_set_bit_lock(0, &b->up);
356 rcu_assign_pointer(tn->bearer_list[bearer_id], b);
358 tipc_bearer_xmit_skb(net, bearer_id, skb, &b->bcast_addr);
360 if (tipc_mon_create(net, bearer_id)) {
361 bearer_disable(net, b);
365 pr_info("Enabled bearer <%s>, priority %u\n", name, prio);
369 pr_warn("Enabling of bearer <%s> rejected, %s\n", name, errstr);
374 * tipc_reset_bearer - Reset all links established over this bearer
375 * @net: the applicable net namespace
376 * @b: the target bearer
378 static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b)
380 pr_info("Resetting bearer <%s>\n", b->name);
381 tipc_node_delete_links(net, b->identity);
382 tipc_disc_reset(net, b);
386 bool tipc_bearer_hold(struct tipc_bearer *b)
388 return (b && refcount_inc_not_zero(&b->refcnt));
391 void tipc_bearer_put(struct tipc_bearer *b)
393 if (b && refcount_dec_and_test(&b->refcnt))
398 * bearer_disable - disable this bearer
399 * @net: the applicable net namespace
400 * @b: the bearer to disable
402 * Note: This routine assumes caller holds RTNL lock.
404 static void bearer_disable(struct net *net, struct tipc_bearer *b)
406 struct tipc_net *tn = tipc_net(net);
407 int bearer_id = b->identity;
409 pr_info("Disabling bearer <%s>\n", b->name);
410 clear_bit_unlock(0, &b->up);
411 tipc_node_delete_links(net, bearer_id);
412 b->media->disable_media(b);
413 RCU_INIT_POINTER(b->media_ptr, NULL);
415 tipc_disc_delete(b->disc);
416 RCU_INIT_POINTER(tn->bearer_list[bearer_id], NULL);
418 tipc_mon_delete(net, bearer_id);
421 int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b,
422 struct nlattr *attr[])
424 char *dev_name = strchr((const char *)b->name, ':') + 1;
425 int hwaddr_len = b->media->hwaddr_len;
426 u8 node_id[NODE_ID_LEN] = {0,};
427 struct net_device *dev;
429 /* Find device with specified name */
430 dev = dev_get_by_name(net, dev_name);
433 if (tipc_mtu_bad(dev, 0)) {
437 if (dev == net->loopback_dev) {
439 pr_info("Enabling <%s> not permitted\n", b->name);
443 /* Autoconfigure own node identity if needed */
444 if (!tipc_own_id(net) && hwaddr_len <= NODE_ID_LEN) {
445 memcpy(node_id, dev->dev_addr, hwaddr_len);
446 tipc_net_init(net, node_id, 0);
448 if (!tipc_own_id(net)) {
450 pr_warn("Failed to obtain node identity\n");
454 /* Associate TIPC bearer with L2 bearer */
455 rcu_assign_pointer(b->media_ptr, dev);
457 b->pt.type = htons(ETH_P_TIPC);
458 b->pt.func = tipc_l2_rcv_msg;
459 dev_add_pack(&b->pt);
460 memset(&b->bcast_addr, 0, sizeof(b->bcast_addr));
461 memcpy(b->bcast_addr.value, dev->broadcast, hwaddr_len);
462 b->bcast_addr.media_id = b->media->type_id;
463 b->bcast_addr.broadcast = TIPC_BROADCAST_SUPPORT;
465 b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr);
466 rcu_assign_pointer(dev->tipc_ptr, b);
470 /* tipc_disable_l2_media - detach TIPC bearer from an L2 interface
471 * @b: the target bearer
473 * Mark L2 bearer as inactive so that incoming buffers are thrown away
475 void tipc_disable_l2_media(struct tipc_bearer *b)
477 struct net_device *dev;
479 dev = (struct net_device *)rtnl_dereference(b->media_ptr);
480 dev_remove_pack(&b->pt);
481 RCU_INIT_POINTER(dev->tipc_ptr, NULL);
487 * tipc_l2_send_msg - send a TIPC packet out over an L2 interface
488 * @net: the associated network namespace
489 * @skb: the packet to be sent
490 * @b: the bearer through which the packet is to be sent
491 * @dest: peer destination address
493 int tipc_l2_send_msg(struct net *net, struct sk_buff *skb,
494 struct tipc_bearer *b, struct tipc_media_addr *dest)
496 struct net_device *dev;
499 dev = (struct net_device *)rcu_dereference(b->media_ptr);
503 delta = SKB_DATA_ALIGN(dev->hard_header_len - skb_headroom(skb));
504 if ((delta > 0) && pskb_expand_head(skb, delta, 0, GFP_ATOMIC)) {
508 skb_reset_network_header(skb);
510 skb->protocol = htons(ETH_P_TIPC);
511 dev_hard_header(skb, dev, ETH_P_TIPC, dest->value,
512 dev->dev_addr, skb->len);
517 bool tipc_bearer_bcast_support(struct net *net, u32 bearer_id)
520 struct tipc_bearer *b;
523 b = bearer_get(net, bearer_id);
525 supp = (b->bcast_addr.broadcast == TIPC_BROADCAST_SUPPORT);
530 int tipc_bearer_mtu(struct net *net, u32 bearer_id)
533 struct tipc_bearer *b;
536 b = rcu_dereference(tipc_net(net)->bearer_list[bearer_id]);
543 /* tipc_bearer_xmit_skb - sends buffer to destination over bearer
545 void tipc_bearer_xmit_skb(struct net *net, u32 bearer_id,
547 struct tipc_media_addr *dest)
549 struct tipc_msg *hdr = buf_msg(skb);
550 struct tipc_bearer *b;
553 b = bearer_get(net, bearer_id);
554 if (likely(b && (test_bit(0, &b->up) || msg_is_reset(hdr)))) {
555 #ifdef CONFIG_TIPC_CRYPTO
556 tipc_crypto_xmit(net, &skb, b, dest, NULL);
559 b->media->send_msg(net, skb, b, dest);
566 /* tipc_bearer_xmit() -send buffer to destination over bearer
568 void tipc_bearer_xmit(struct net *net, u32 bearer_id,
569 struct sk_buff_head *xmitq,
570 struct tipc_media_addr *dst,
571 struct tipc_node *__dnode)
573 struct tipc_bearer *b;
574 struct sk_buff *skb, *tmp;
576 if (skb_queue_empty(xmitq))
580 b = bearer_get(net, bearer_id);
582 __skb_queue_purge(xmitq);
583 skb_queue_walk_safe(xmitq, skb, tmp) {
584 __skb_dequeue(xmitq);
585 if (likely(test_bit(0, &b->up) || msg_is_reset(buf_msg(skb)))) {
586 #ifdef CONFIG_TIPC_CRYPTO
587 tipc_crypto_xmit(net, &skb, b, dst, __dnode);
590 b->media->send_msg(net, skb, b, dst);
598 /* tipc_bearer_bc_xmit() - broadcast buffers to all destinations
600 void tipc_bearer_bc_xmit(struct net *net, u32 bearer_id,
601 struct sk_buff_head *xmitq)
603 struct tipc_net *tn = tipc_net(net);
604 struct tipc_media_addr *dst;
605 int net_id = tn->net_id;
606 struct tipc_bearer *b;
607 struct sk_buff *skb, *tmp;
608 struct tipc_msg *hdr;
611 b = bearer_get(net, bearer_id);
612 if (unlikely(!b || !test_bit(0, &b->up)))
613 __skb_queue_purge(xmitq);
614 skb_queue_walk_safe(xmitq, skb, tmp) {
616 msg_set_non_seq(hdr, 1);
617 msg_set_mc_netid(hdr, net_id);
618 __skb_dequeue(xmitq);
619 dst = &b->bcast_addr;
620 #ifdef CONFIG_TIPC_CRYPTO
621 tipc_crypto_xmit(net, &skb, b, dst, NULL);
624 b->media->send_msg(net, skb, b, dst);
630 * tipc_l2_rcv_msg - handle incoming TIPC message from an interface
631 * @skb: the received message
632 * @dev: the net device that the packet was received on
633 * @pt: the packet_type structure which was used to register this handler
634 * @orig_dev: the original receive net device in case the device is a bond
636 * Accept only packets explicitly sent to this node, or broadcast packets;
637 * ignores packets sent using interface multicast, and traffic sent to other
638 * nodes (which can happen if interface is running in promiscuous mode).
640 static int tipc_l2_rcv_msg(struct sk_buff *skb, struct net_device *dev,
641 struct packet_type *pt, struct net_device *orig_dev)
643 struct tipc_bearer *b;
646 b = rcu_dereference(dev->tipc_ptr) ?:
647 rcu_dereference(orig_dev->tipc_ptr);
648 if (likely(b && test_bit(0, &b->up) &&
649 (skb->pkt_type <= PACKET_MULTICAST))) {
650 skb_mark_not_on_list(skb);
651 TIPC_SKB_CB(skb)->flags = 0;
652 tipc_rcv(dev_net(b->pt.dev), skb, b);
654 return NET_RX_SUCCESS;
662 * tipc_l2_device_event - handle device events from network device
663 * @nb: the context of the notification
664 * @evt: the type of event
665 * @ptr: the net device that the event was on
667 * This function is called by the Ethernet driver in case of link
670 static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt,
673 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
674 struct net *net = dev_net(dev);
675 struct tipc_bearer *b;
677 b = rtnl_dereference(dev->tipc_ptr);
681 trace_tipc_l2_device_event(dev, b, evt);
684 if (netif_carrier_ok(dev) && netif_oper_up(dev)) {
685 test_and_set_bit_lock(0, &b->up);
689 case NETDEV_GOING_DOWN:
690 clear_bit_unlock(0, &b->up);
691 tipc_reset_bearer(net, b);
694 test_and_set_bit_lock(0, &b->up);
696 case NETDEV_CHANGEMTU:
697 if (tipc_mtu_bad(dev, 0)) {
698 bearer_disable(net, b);
702 tipc_reset_bearer(net, b);
704 case NETDEV_CHANGEADDR:
705 b->media->raw2addr(b, &b->addr,
706 (char *)dev->dev_addr);
707 tipc_reset_bearer(net, b);
709 case NETDEV_UNREGISTER:
710 case NETDEV_CHANGENAME:
711 bearer_disable(net, b);
717 static struct notifier_block notifier = {
718 .notifier_call = tipc_l2_device_event,
722 int tipc_bearer_setup(void)
724 return register_netdevice_notifier(¬ifier);
727 void tipc_bearer_cleanup(void)
729 unregister_netdevice_notifier(¬ifier);
732 void tipc_bearer_stop(struct net *net)
734 struct tipc_net *tn = net_generic(net, tipc_net_id);
735 struct tipc_bearer *b;
738 for (i = 0; i < MAX_BEARERS; i++) {
739 b = rtnl_dereference(tn->bearer_list[i]);
741 bearer_disable(net, b);
742 tn->bearer_list[i] = NULL;
747 void tipc_clone_to_loopback(struct net *net, struct sk_buff_head *pkts)
749 struct net_device *dev = net->loopback_dev;
750 struct sk_buff *skb, *_skb;
753 skb_queue_walk(pkts, _skb) {
754 skb = pskb_copy(_skb, GFP_ATOMIC);
758 exp = SKB_DATA_ALIGN(dev->hard_header_len - skb_headroom(skb));
759 if (exp > 0 && pskb_expand_head(skb, exp, 0, GFP_ATOMIC)) {
764 skb_reset_network_header(skb);
765 dev_hard_header(skb, dev, ETH_P_TIPC, dev->dev_addr,
766 dev->dev_addr, skb->len);
768 skb->pkt_type = PACKET_HOST;
769 skb->ip_summed = CHECKSUM_UNNECESSARY;
770 skb->protocol = eth_type_trans(skb, dev);
775 static int tipc_loopback_rcv_pkt(struct sk_buff *skb, struct net_device *dev,
776 struct packet_type *pt, struct net_device *od)
779 return NET_RX_SUCCESS;
782 int tipc_attach_loopback(struct net *net)
784 struct net_device *dev = net->loopback_dev;
785 struct tipc_net *tn = tipc_net(net);
791 tn->loopback_pt.dev = dev;
792 tn->loopback_pt.type = htons(ETH_P_TIPC);
793 tn->loopback_pt.func = tipc_loopback_rcv_pkt;
794 dev_add_pack(&tn->loopback_pt);
798 void tipc_detach_loopback(struct net *net)
800 struct tipc_net *tn = tipc_net(net);
802 dev_remove_pack(&tn->loopback_pt);
803 dev_put(net->loopback_dev);
806 /* Caller should hold rtnl_lock to protect the bearer */
807 static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg,
808 struct tipc_bearer *bearer, int nlflags)
811 struct nlattr *attrs;
814 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
815 nlflags, TIPC_NL_BEARER_GET);
819 attrs = nla_nest_start_noflag(msg->skb, TIPC_NLA_BEARER);
823 if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name))
826 prop = nla_nest_start_noflag(msg->skb, TIPC_NLA_BEARER_PROP);
829 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority))
831 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance))
833 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->max_win))
835 if (bearer->media->type_id == TIPC_MEDIA_TYPE_UDP)
836 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_MTU, bearer->mtu))
839 nla_nest_end(msg->skb, prop);
841 #ifdef CONFIG_TIPC_MEDIA_UDP
842 if (bearer->media->type_id == TIPC_MEDIA_TYPE_UDP) {
843 if (tipc_udp_nl_add_bearer_data(msg, bearer))
848 nla_nest_end(msg->skb, attrs);
849 genlmsg_end(msg->skb, hdr);
854 nla_nest_cancel(msg->skb, prop);
856 nla_nest_cancel(msg->skb, attrs);
858 genlmsg_cancel(msg->skb, hdr);
863 int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb)
867 struct tipc_bearer *bearer;
868 struct tipc_nl_msg msg;
869 struct net *net = sock_net(skb->sk);
870 struct tipc_net *tn = net_generic(net, tipc_net_id);
872 if (i == MAX_BEARERS)
876 msg.portid = NETLINK_CB(cb->skb).portid;
877 msg.seq = cb->nlh->nlmsg_seq;
880 for (i = 0; i < MAX_BEARERS; i++) {
881 bearer = rtnl_dereference(tn->bearer_list[i]);
885 err = __tipc_nl_add_bearer(&msg, bearer, NLM_F_MULTI);
895 int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info)
900 struct tipc_bearer *bearer;
901 struct tipc_nl_msg msg;
902 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
903 struct net *net = genl_info_net(info);
905 if (!info->attrs[TIPC_NLA_BEARER])
908 err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX,
909 info->attrs[TIPC_NLA_BEARER],
910 tipc_nl_bearer_policy, info->extack);
914 if (!attrs[TIPC_NLA_BEARER_NAME])
916 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
918 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
923 msg.portid = info->snd_portid;
924 msg.seq = info->snd_seq;
927 bearer = tipc_bearer_find(net, name);
930 NL_SET_ERR_MSG(info->extack, "Bearer not found");
934 err = __tipc_nl_add_bearer(&msg, bearer, 0);
939 return genlmsg_reply(rep, info);
947 int __tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info)
951 struct tipc_bearer *bearer;
952 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
953 struct net *net = sock_net(skb->sk);
955 if (!info->attrs[TIPC_NLA_BEARER])
958 err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX,
959 info->attrs[TIPC_NLA_BEARER],
960 tipc_nl_bearer_policy, info->extack);
964 if (!attrs[TIPC_NLA_BEARER_NAME])
967 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
969 bearer = tipc_bearer_find(net, name);
971 NL_SET_ERR_MSG(info->extack, "Bearer not found");
975 bearer_disable(net, bearer);
980 int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info)
985 err = __tipc_nl_bearer_disable(skb, info);
991 int __tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
995 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
996 struct net *net = sock_net(skb->sk);
1000 prio = TIPC_MEDIA_LINK_PRI;
1002 if (!info->attrs[TIPC_NLA_BEARER])
1005 err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX,
1006 info->attrs[TIPC_NLA_BEARER],
1007 tipc_nl_bearer_policy, info->extack);
1011 if (!attrs[TIPC_NLA_BEARER_NAME])
1014 bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
1016 if (attrs[TIPC_NLA_BEARER_DOMAIN])
1017 domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]);
1019 if (attrs[TIPC_NLA_BEARER_PROP]) {
1020 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
1022 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
1027 if (props[TIPC_NLA_PROP_PRIO])
1028 prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
1031 return tipc_enable_bearer(net, bearer, domain, prio, attrs,
1035 int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
1040 err = __tipc_nl_bearer_enable(skb, info);
1046 int tipc_nl_bearer_add(struct sk_buff *skb, struct genl_info *info)
1050 struct tipc_bearer *b;
1051 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1052 struct net *net = sock_net(skb->sk);
1054 if (!info->attrs[TIPC_NLA_BEARER])
1057 err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX,
1058 info->attrs[TIPC_NLA_BEARER],
1059 tipc_nl_bearer_policy, info->extack);
1063 if (!attrs[TIPC_NLA_BEARER_NAME])
1065 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
1068 b = tipc_bearer_find(net, name);
1071 NL_SET_ERR_MSG(info->extack, "Bearer not found");
1075 #ifdef CONFIG_TIPC_MEDIA_UDP
1076 if (attrs[TIPC_NLA_BEARER_UDP_OPTS]) {
1077 err = tipc_udp_nl_bearer_add(b,
1078 attrs[TIPC_NLA_BEARER_UDP_OPTS]);
1090 int __tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
1092 struct tipc_bearer *b;
1093 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1094 struct net *net = sock_net(skb->sk);
1098 if (!info->attrs[TIPC_NLA_BEARER])
1101 err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX,
1102 info->attrs[TIPC_NLA_BEARER],
1103 tipc_nl_bearer_policy, info->extack);
1107 if (!attrs[TIPC_NLA_BEARER_NAME])
1109 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
1111 b = tipc_bearer_find(net, name);
1113 NL_SET_ERR_MSG(info->extack, "Bearer not found");
1117 if (attrs[TIPC_NLA_BEARER_PROP]) {
1118 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
1120 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
1125 if (props[TIPC_NLA_PROP_TOL]) {
1126 b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
1127 tipc_node_apply_property(net, b, TIPC_NLA_PROP_TOL);
1129 if (props[TIPC_NLA_PROP_PRIO])
1130 b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
1131 if (props[TIPC_NLA_PROP_WIN])
1132 b->max_win = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
1133 if (props[TIPC_NLA_PROP_MTU]) {
1134 if (b->media->type_id != TIPC_MEDIA_TYPE_UDP) {
1135 NL_SET_ERR_MSG(info->extack,
1136 "MTU property is unsupported");
1139 #ifdef CONFIG_TIPC_MEDIA_UDP
1140 if (tipc_udp_mtu_bad(nla_get_u32
1141 (props[TIPC_NLA_PROP_MTU]))) {
1142 NL_SET_ERR_MSG(info->extack,
1143 "MTU value is out-of-range");
1146 b->mtu = nla_get_u32(props[TIPC_NLA_PROP_MTU]);
1147 tipc_node_apply_property(net, b, TIPC_NLA_PROP_MTU);
1155 int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
1160 err = __tipc_nl_bearer_set(skb, info);
1166 static int __tipc_nl_add_media(struct tipc_nl_msg *msg,
1167 struct tipc_media *media, int nlflags)
1170 struct nlattr *attrs;
1171 struct nlattr *prop;
1173 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
1174 nlflags, TIPC_NL_MEDIA_GET);
1178 attrs = nla_nest_start_noflag(msg->skb, TIPC_NLA_MEDIA);
1182 if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name))
1185 prop = nla_nest_start_noflag(msg->skb, TIPC_NLA_MEDIA_PROP);
1188 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority))
1190 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance))
1192 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->max_win))
1194 if (media->type_id == TIPC_MEDIA_TYPE_UDP)
1195 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_MTU, media->mtu))
1198 nla_nest_end(msg->skb, prop);
1199 nla_nest_end(msg->skb, attrs);
1200 genlmsg_end(msg->skb, hdr);
1205 nla_nest_cancel(msg->skb, prop);
1207 nla_nest_cancel(msg->skb, attrs);
1209 genlmsg_cancel(msg->skb, hdr);
1214 int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb)
1217 int i = cb->args[0];
1218 struct tipc_nl_msg msg;
1224 msg.portid = NETLINK_CB(cb->skb).portid;
1225 msg.seq = cb->nlh->nlmsg_seq;
1228 for (; media_info_array[i] != NULL; i++) {
1229 err = __tipc_nl_add_media(&msg, media_info_array[i],
1240 int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info)
1244 struct tipc_nl_msg msg;
1245 struct tipc_media *media;
1246 struct sk_buff *rep;
1247 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1249 if (!info->attrs[TIPC_NLA_MEDIA])
1252 err = nla_parse_nested_deprecated(attrs, TIPC_NLA_MEDIA_MAX,
1253 info->attrs[TIPC_NLA_MEDIA],
1254 tipc_nl_media_policy, info->extack);
1258 if (!attrs[TIPC_NLA_MEDIA_NAME])
1260 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1262 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1267 msg.portid = info->snd_portid;
1268 msg.seq = info->snd_seq;
1271 media = tipc_media_find(name);
1273 NL_SET_ERR_MSG(info->extack, "Media not found");
1278 err = __tipc_nl_add_media(&msg, media, 0);
1283 return genlmsg_reply(rep, info);
1291 int __tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
1295 struct tipc_media *m;
1296 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1298 if (!info->attrs[TIPC_NLA_MEDIA])
1301 err = nla_parse_nested_deprecated(attrs, TIPC_NLA_MEDIA_MAX,
1302 info->attrs[TIPC_NLA_MEDIA],
1303 tipc_nl_media_policy, info->extack);
1305 if (!attrs[TIPC_NLA_MEDIA_NAME])
1307 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1309 m = tipc_media_find(name);
1311 NL_SET_ERR_MSG(info->extack, "Media not found");
1314 if (attrs[TIPC_NLA_MEDIA_PROP]) {
1315 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
1317 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP],
1322 if (props[TIPC_NLA_PROP_TOL])
1323 m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
1324 if (props[TIPC_NLA_PROP_PRIO])
1325 m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
1326 if (props[TIPC_NLA_PROP_WIN])
1327 m->max_win = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
1328 if (props[TIPC_NLA_PROP_MTU]) {
1329 if (m->type_id != TIPC_MEDIA_TYPE_UDP) {
1330 NL_SET_ERR_MSG(info->extack,
1331 "MTU property is unsupported");
1334 #ifdef CONFIG_TIPC_MEDIA_UDP
1335 if (tipc_udp_mtu_bad(nla_get_u32
1336 (props[TIPC_NLA_PROP_MTU]))) {
1337 NL_SET_ERR_MSG(info->extack,
1338 "MTU value is out-of-range");
1341 m->mtu = nla_get_u32(props[TIPC_NLA_PROP_MTU]);
1349 int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
1354 err = __tipc_nl_media_set(skb, info);