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
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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
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
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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"
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
76 struct tipc_media *tipc_media_find(const char *name)
80 for (i = 0; media_info_array[i] != NULL; i++) {
81 if (!strcmp(media_info_array[i]->name, name))
84 return media_info_array[i];
88 * media_find_id - locates specified media object by type identifier
90 static struct tipc_media *media_find_id(u8 type)
94 for (i = 0; media_info_array[i] != NULL; i++) {
95 if (media_info_array[i]->type_id == type)
98 return media_info_array[i];
102 * tipc_media_addr_printf - record media address in print buffer
104 int tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a)
106 char addr_str[MAX_ADDR_STR];
107 struct tipc_media *m;
110 m = media_find_id(a->media_id);
112 if (m && !m->addr2str(a, addr_str, sizeof(addr_str)))
113 ret = scnprintf(buf, len, "%s(%s)", m->name, addr_str);
117 ret = scnprintf(buf, len, "UNKNOWN(%u)", a->media_id);
118 for (i = 0; i < sizeof(a->value); i++)
119 ret += scnprintf(buf + ret, len - ret,
126 * bearer_name_validate - validate & (optionally) deconstruct bearer name
127 * @name: ptr to bearer name string
128 * @name_parts: ptr to area for bearer name components (or NULL if not needed)
130 * Returns 1 if bearer name is valid, otherwise 0.
132 static int bearer_name_validate(const char *name,
133 struct tipc_bearer_names *name_parts)
135 char name_copy[TIPC_MAX_BEARER_NAME];
141 /* copy bearer name & ensure length is OK */
142 name_copy[TIPC_MAX_BEARER_NAME - 1] = 0;
143 /* need above in case non-Posix strncpy() doesn't pad with nulls */
144 strncpy(name_copy, name, TIPC_MAX_BEARER_NAME);
145 if (name_copy[TIPC_MAX_BEARER_NAME - 1] != 0)
148 /* ensure all component parts of bearer name are present */
149 media_name = name_copy;
150 if_name = strchr(media_name, ':');
154 media_len = if_name - media_name;
155 if_len = strlen(if_name) + 1;
157 /* validate component parts of bearer name */
158 if ((media_len <= 1) || (media_len > TIPC_MAX_MEDIA_NAME) ||
159 (if_len <= 1) || (if_len > TIPC_MAX_IF_NAME))
162 /* return bearer name components, if necessary */
164 strcpy(name_parts->media_name, media_name);
165 strcpy(name_parts->if_name, if_name);
171 * tipc_bearer_find - locates bearer object with matching bearer name
173 struct tipc_bearer *tipc_bearer_find(struct net *net, const char *name)
175 struct tipc_net *tn = net_generic(net, tipc_net_id);
176 struct tipc_bearer *b;
179 for (i = 0; i < MAX_BEARERS; i++) {
180 b = rtnl_dereference(tn->bearer_list[i]);
181 if (b && (!strcmp(b->name, name)))
187 /* tipc_bearer_get_name - get the bearer name from its id.
188 * @net: network namespace
189 * @name: a pointer to the buffer where the name will be stored.
190 * @bearer_id: the id to get the name from.
192 int tipc_bearer_get_name(struct net *net, char *name, u32 bearer_id)
194 struct tipc_net *tn = tipc_net(net);
195 struct tipc_bearer *b;
197 if (bearer_id >= MAX_BEARERS)
200 b = rtnl_dereference(tn->bearer_list[bearer_id]);
204 strcpy(name, b->name);
208 void tipc_bearer_add_dest(struct net *net, u32 bearer_id, u32 dest)
210 struct tipc_net *tn = net_generic(net, tipc_net_id);
211 struct tipc_bearer *b;
214 b = rcu_dereference(tn->bearer_list[bearer_id]);
216 tipc_disc_add_dest(b->disc);
220 void tipc_bearer_remove_dest(struct net *net, u32 bearer_id, u32 dest)
222 struct tipc_net *tn = net_generic(net, tipc_net_id);
223 struct tipc_bearer *b;
226 b = rcu_dereference(tn->bearer_list[bearer_id]);
228 tipc_disc_remove_dest(b->disc);
233 * tipc_enable_bearer - enable bearer with the given name
235 static int tipc_enable_bearer(struct net *net, const char *name,
236 u32 disc_domain, u32 prio,
237 struct nlattr *attr[])
239 struct tipc_net *tn = tipc_net(net);
240 struct tipc_bearer_names b_names;
241 int with_this_prio = 1;
242 struct tipc_bearer *b;
243 struct tipc_media *m;
249 if (!bearer_name_validate(name, &b_names)) {
250 errstr = "illegal name";
254 if (prio > TIPC_MAX_LINK_PRI && prio != TIPC_MEDIA_LINK_PRI) {
255 errstr = "illegal priority";
259 m = tipc_media_find(b_names.media_name);
261 errstr = "media not registered";
265 if (prio == TIPC_MEDIA_LINK_PRI)
268 /* Check new bearer vs existing ones and find free bearer id if any */
269 while (bearer_id < MAX_BEARERS) {
270 b = rtnl_dereference(tn->bearer_list[bearer_id]);
273 if (!strcmp(name, b->name)) {
274 errstr = "already enabled";
278 if (b->priority != prio)
280 if (++with_this_prio <= 2)
282 pr_warn("Bearer <%s>: already 2 bearers with priority %u\n",
284 if (prio == TIPC_MIN_LINK_PRI) {
285 errstr = "cannot adjust to lower";
288 pr_warn("Bearer <%s>: trying with adjusted priority\n", name);
294 if (bearer_id >= MAX_BEARERS) {
295 errstr = "max 3 bearers permitted";
299 b = kzalloc(sizeof(*b), GFP_ATOMIC);
303 strcpy(b->name, name);
305 res = m->enable_media(net, b, attr);
308 errstr = "failed to enable media";
312 b->identity = bearer_id;
313 b->tolerance = m->tolerance;
314 b->min_win = m->min_win;
315 b->max_win = m->max_win;
316 b->domain = disc_domain;
317 b->net_plane = bearer_id + 'A';
319 test_and_set_bit_lock(0, &b->up);
320 refcount_set(&b->refcnt, 1);
322 res = tipc_disc_create(net, b, &b->bcast_addr, &skb);
324 bearer_disable(net, b);
325 errstr = "failed to create discoverer";
329 rcu_assign_pointer(tn->bearer_list[bearer_id], b);
331 tipc_bearer_xmit_skb(net, bearer_id, skb, &b->bcast_addr);
333 if (tipc_mon_create(net, bearer_id)) {
334 bearer_disable(net, b);
338 pr_info("Enabled bearer <%s>, priority %u\n", name, prio);
342 pr_warn("Enabling of bearer <%s> rejected, %s\n", name, errstr);
347 * tipc_reset_bearer - Reset all links established over this bearer
349 static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b)
351 pr_info("Resetting bearer <%s>\n", b->name);
352 tipc_node_delete_links(net, b->identity);
353 tipc_disc_reset(net, b);
357 bool tipc_bearer_hold(struct tipc_bearer *b)
359 return (b && refcount_inc_not_zero(&b->refcnt));
362 void tipc_bearer_put(struct tipc_bearer *b)
364 if (b && refcount_dec_and_test(&b->refcnt))
371 * Note: This routine assumes caller holds RTNL lock.
373 static void bearer_disable(struct net *net, struct tipc_bearer *b)
375 struct tipc_net *tn = tipc_net(net);
376 int bearer_id = b->identity;
378 pr_info("Disabling bearer <%s>\n", b->name);
379 clear_bit_unlock(0, &b->up);
380 tipc_node_delete_links(net, bearer_id);
381 b->media->disable_media(b);
382 RCU_INIT_POINTER(b->media_ptr, NULL);
384 tipc_disc_delete(b->disc);
385 RCU_INIT_POINTER(tn->bearer_list[bearer_id], NULL);
387 tipc_mon_delete(net, bearer_id);
390 int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b,
391 struct nlattr *attr[])
393 char *dev_name = strchr((const char *)b->name, ':') + 1;
394 int hwaddr_len = b->media->hwaddr_len;
395 u8 node_id[NODE_ID_LEN] = {0,};
396 struct net_device *dev;
398 /* Find device with specified name */
399 dev = dev_get_by_name(net, dev_name);
402 if (tipc_mtu_bad(dev, 0)) {
406 if (dev == net->loopback_dev) {
408 pr_info("Enabling <%s> not permitted\n", b->name);
412 /* Autoconfigure own node identity if needed */
413 if (!tipc_own_id(net) && hwaddr_len <= NODE_ID_LEN) {
414 memcpy(node_id, dev->dev_addr, hwaddr_len);
415 tipc_net_init(net, node_id, 0);
417 if (!tipc_own_id(net)) {
419 pr_warn("Failed to obtain node identity\n");
423 /* Associate TIPC bearer with L2 bearer */
424 rcu_assign_pointer(b->media_ptr, dev);
426 b->pt.type = htons(ETH_P_TIPC);
427 b->pt.func = tipc_l2_rcv_msg;
428 dev_add_pack(&b->pt);
429 memset(&b->bcast_addr, 0, sizeof(b->bcast_addr));
430 memcpy(b->bcast_addr.value, dev->broadcast, hwaddr_len);
431 b->bcast_addr.media_id = b->media->type_id;
432 b->bcast_addr.broadcast = TIPC_BROADCAST_SUPPORT;
434 b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr);
435 rcu_assign_pointer(dev->tipc_ptr, b);
439 /* tipc_disable_l2_media - detach TIPC bearer from an L2 interface
441 * Mark L2 bearer as inactive so that incoming buffers are thrown away
443 void tipc_disable_l2_media(struct tipc_bearer *b)
445 struct net_device *dev;
447 dev = (struct net_device *)rtnl_dereference(b->media_ptr);
448 dev_remove_pack(&b->pt);
449 RCU_INIT_POINTER(dev->tipc_ptr, NULL);
455 * tipc_l2_send_msg - send a TIPC packet out over an L2 interface
456 * @skb: the packet to be sent
457 * @b: the bearer through which the packet is to be sent
458 * @dest: peer destination address
460 int tipc_l2_send_msg(struct net *net, struct sk_buff *skb,
461 struct tipc_bearer *b, struct tipc_media_addr *dest)
463 struct net_device *dev;
466 dev = (struct net_device *)rcu_dereference(b->media_ptr);
470 delta = SKB_DATA_ALIGN(dev->hard_header_len - skb_headroom(skb));
471 if ((delta > 0) && pskb_expand_head(skb, delta, 0, GFP_ATOMIC)) {
475 skb_reset_network_header(skb);
477 skb->protocol = htons(ETH_P_TIPC);
478 dev_hard_header(skb, dev, ETH_P_TIPC, dest->value,
479 dev->dev_addr, skb->len);
484 bool tipc_bearer_bcast_support(struct net *net, u32 bearer_id)
487 struct tipc_bearer *b;
490 b = bearer_get(net, bearer_id);
492 supp = (b->bcast_addr.broadcast == TIPC_BROADCAST_SUPPORT);
497 int tipc_bearer_mtu(struct net *net, u32 bearer_id)
500 struct tipc_bearer *b;
503 b = rcu_dereference(tipc_net(net)->bearer_list[bearer_id]);
510 /* tipc_bearer_xmit_skb - sends buffer to destination over bearer
512 void tipc_bearer_xmit_skb(struct net *net, u32 bearer_id,
514 struct tipc_media_addr *dest)
516 struct tipc_msg *hdr = buf_msg(skb);
517 struct tipc_bearer *b;
520 b = bearer_get(net, bearer_id);
521 if (likely(b && (test_bit(0, &b->up) || msg_is_reset(hdr)))) {
522 #ifdef CONFIG_TIPC_CRYPTO
523 tipc_crypto_xmit(net, &skb, b, dest, NULL);
526 b->media->send_msg(net, skb, b, dest);
533 /* tipc_bearer_xmit() -send buffer to destination over bearer
535 void tipc_bearer_xmit(struct net *net, u32 bearer_id,
536 struct sk_buff_head *xmitq,
537 struct tipc_media_addr *dst,
538 struct tipc_node *__dnode)
540 struct tipc_bearer *b;
541 struct sk_buff *skb, *tmp;
543 if (skb_queue_empty(xmitq))
547 b = bearer_get(net, bearer_id);
549 __skb_queue_purge(xmitq);
550 skb_queue_walk_safe(xmitq, skb, tmp) {
551 __skb_dequeue(xmitq);
552 if (likely(test_bit(0, &b->up) || msg_is_reset(buf_msg(skb)))) {
553 #ifdef CONFIG_TIPC_CRYPTO
554 tipc_crypto_xmit(net, &skb, b, dst, __dnode);
557 b->media->send_msg(net, skb, b, dst);
565 /* tipc_bearer_bc_xmit() - broadcast buffers to all destinations
567 void tipc_bearer_bc_xmit(struct net *net, u32 bearer_id,
568 struct sk_buff_head *xmitq)
570 struct tipc_net *tn = tipc_net(net);
571 struct tipc_media_addr *dst;
572 int net_id = tn->net_id;
573 struct tipc_bearer *b;
574 struct sk_buff *skb, *tmp;
575 struct tipc_msg *hdr;
578 b = bearer_get(net, bearer_id);
579 if (unlikely(!b || !test_bit(0, &b->up)))
580 __skb_queue_purge(xmitq);
581 skb_queue_walk_safe(xmitq, skb, tmp) {
583 msg_set_non_seq(hdr, 1);
584 msg_set_mc_netid(hdr, net_id);
585 __skb_dequeue(xmitq);
586 dst = &b->bcast_addr;
587 #ifdef CONFIG_TIPC_CRYPTO
588 tipc_crypto_xmit(net, &skb, b, dst, NULL);
591 b->media->send_msg(net, skb, b, dst);
597 * tipc_l2_rcv_msg - handle incoming TIPC message from an interface
598 * @buf: the received packet
599 * @dev: the net device that the packet was received on
600 * @pt: the packet_type structure which was used to register this handler
601 * @orig_dev: the original receive net device in case the device is a bond
603 * Accept only packets explicitly sent to this node, or broadcast packets;
604 * ignores packets sent using interface multicast, and traffic sent to other
605 * nodes (which can happen if interface is running in promiscuous mode).
607 static int tipc_l2_rcv_msg(struct sk_buff *skb, struct net_device *dev,
608 struct packet_type *pt, struct net_device *orig_dev)
610 struct tipc_bearer *b;
613 b = rcu_dereference(dev->tipc_ptr) ?:
614 rcu_dereference(orig_dev->tipc_ptr);
615 if (likely(b && test_bit(0, &b->up) &&
616 (skb->pkt_type <= PACKET_MULTICAST))) {
617 skb_mark_not_on_list(skb);
618 TIPC_SKB_CB(skb)->flags = 0;
619 tipc_rcv(dev_net(b->pt.dev), skb, b);
621 return NET_RX_SUCCESS;
629 * tipc_l2_device_event - handle device events from network device
630 * @nb: the context of the notification
631 * @evt: the type of event
632 * @ptr: the net device that the event was on
634 * This function is called by the Ethernet driver in case of link
637 static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt,
640 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
641 struct net *net = dev_net(dev);
642 struct tipc_bearer *b;
644 b = rtnl_dereference(dev->tipc_ptr);
648 trace_tipc_l2_device_event(dev, b, evt);
651 if (netif_carrier_ok(dev) && netif_oper_up(dev)) {
652 test_and_set_bit_lock(0, &b->up);
656 case NETDEV_GOING_DOWN:
657 clear_bit_unlock(0, &b->up);
658 tipc_reset_bearer(net, b);
661 test_and_set_bit_lock(0, &b->up);
663 case NETDEV_CHANGEMTU:
664 if (tipc_mtu_bad(dev, 0)) {
665 bearer_disable(net, b);
669 tipc_reset_bearer(net, b);
671 case NETDEV_CHANGEADDR:
672 b->media->raw2addr(b, &b->addr,
673 (char *)dev->dev_addr);
674 tipc_reset_bearer(net, b);
676 case NETDEV_UNREGISTER:
677 case NETDEV_CHANGENAME:
678 bearer_disable(net, b);
684 static struct notifier_block notifier = {
685 .notifier_call = tipc_l2_device_event,
689 int tipc_bearer_setup(void)
691 return register_netdevice_notifier(¬ifier);
694 void tipc_bearer_cleanup(void)
696 unregister_netdevice_notifier(¬ifier);
699 void tipc_bearer_stop(struct net *net)
701 struct tipc_net *tn = net_generic(net, tipc_net_id);
702 struct tipc_bearer *b;
705 for (i = 0; i < MAX_BEARERS; i++) {
706 b = rtnl_dereference(tn->bearer_list[i]);
708 bearer_disable(net, b);
709 tn->bearer_list[i] = NULL;
714 void tipc_clone_to_loopback(struct net *net, struct sk_buff_head *pkts)
716 struct net_device *dev = net->loopback_dev;
717 struct sk_buff *skb, *_skb;
720 skb_queue_walk(pkts, _skb) {
721 skb = pskb_copy(_skb, GFP_ATOMIC);
725 exp = SKB_DATA_ALIGN(dev->hard_header_len - skb_headroom(skb));
726 if (exp > 0 && pskb_expand_head(skb, exp, 0, GFP_ATOMIC)) {
731 skb_reset_network_header(skb);
732 dev_hard_header(skb, dev, ETH_P_TIPC, dev->dev_addr,
733 dev->dev_addr, skb->len);
735 skb->pkt_type = PACKET_HOST;
736 skb->ip_summed = CHECKSUM_UNNECESSARY;
737 skb->protocol = eth_type_trans(skb, dev);
742 static int tipc_loopback_rcv_pkt(struct sk_buff *skb, struct net_device *dev,
743 struct packet_type *pt, struct net_device *od)
746 return NET_RX_SUCCESS;
749 int tipc_attach_loopback(struct net *net)
751 struct net_device *dev = net->loopback_dev;
752 struct tipc_net *tn = tipc_net(net);
758 tn->loopback_pt.dev = dev;
759 tn->loopback_pt.type = htons(ETH_P_TIPC);
760 tn->loopback_pt.func = tipc_loopback_rcv_pkt;
761 dev_add_pack(&tn->loopback_pt);
765 void tipc_detach_loopback(struct net *net)
767 struct tipc_net *tn = tipc_net(net);
769 dev_remove_pack(&tn->loopback_pt);
770 dev_put(net->loopback_dev);
773 /* Caller should hold rtnl_lock to protect the bearer */
774 static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg,
775 struct tipc_bearer *bearer, int nlflags)
778 struct nlattr *attrs;
781 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
782 nlflags, TIPC_NL_BEARER_GET);
786 attrs = nla_nest_start_noflag(msg->skb, TIPC_NLA_BEARER);
790 if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name))
793 prop = nla_nest_start_noflag(msg->skb, TIPC_NLA_BEARER_PROP);
796 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority))
798 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance))
800 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->max_win))
802 if (bearer->media->type_id == TIPC_MEDIA_TYPE_UDP)
803 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_MTU, bearer->mtu))
806 nla_nest_end(msg->skb, prop);
808 #ifdef CONFIG_TIPC_MEDIA_UDP
809 if (bearer->media->type_id == TIPC_MEDIA_TYPE_UDP) {
810 if (tipc_udp_nl_add_bearer_data(msg, bearer))
815 nla_nest_end(msg->skb, attrs);
816 genlmsg_end(msg->skb, hdr);
821 nla_nest_cancel(msg->skb, prop);
823 nla_nest_cancel(msg->skb, attrs);
825 genlmsg_cancel(msg->skb, hdr);
830 int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb)
834 struct tipc_bearer *bearer;
835 struct tipc_nl_msg msg;
836 struct net *net = sock_net(skb->sk);
837 struct tipc_net *tn = net_generic(net, tipc_net_id);
839 if (i == MAX_BEARERS)
843 msg.portid = NETLINK_CB(cb->skb).portid;
844 msg.seq = cb->nlh->nlmsg_seq;
847 for (i = 0; i < MAX_BEARERS; i++) {
848 bearer = rtnl_dereference(tn->bearer_list[i]);
852 err = __tipc_nl_add_bearer(&msg, bearer, NLM_F_MULTI);
862 int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info)
867 struct tipc_bearer *bearer;
868 struct tipc_nl_msg msg;
869 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
870 struct net *net = genl_info_net(info);
872 if (!info->attrs[TIPC_NLA_BEARER])
875 err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX,
876 info->attrs[TIPC_NLA_BEARER],
877 tipc_nl_bearer_policy, info->extack);
881 if (!attrs[TIPC_NLA_BEARER_NAME])
883 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
885 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
890 msg.portid = info->snd_portid;
891 msg.seq = info->snd_seq;
894 bearer = tipc_bearer_find(net, name);
900 err = __tipc_nl_add_bearer(&msg, bearer, 0);
905 return genlmsg_reply(rep, info);
913 int __tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info)
917 struct tipc_bearer *bearer;
918 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
919 struct net *net = sock_net(skb->sk);
921 if (!info->attrs[TIPC_NLA_BEARER])
924 err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX,
925 info->attrs[TIPC_NLA_BEARER],
926 tipc_nl_bearer_policy, info->extack);
930 if (!attrs[TIPC_NLA_BEARER_NAME])
933 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
935 bearer = tipc_bearer_find(net, name);
939 bearer_disable(net, bearer);
944 int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info)
949 err = __tipc_nl_bearer_disable(skb, info);
955 int __tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
959 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
960 struct net *net = sock_net(skb->sk);
964 prio = TIPC_MEDIA_LINK_PRI;
966 if (!info->attrs[TIPC_NLA_BEARER])
969 err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX,
970 info->attrs[TIPC_NLA_BEARER],
971 tipc_nl_bearer_policy, info->extack);
975 if (!attrs[TIPC_NLA_BEARER_NAME])
978 bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
980 if (attrs[TIPC_NLA_BEARER_DOMAIN])
981 domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]);
983 if (attrs[TIPC_NLA_BEARER_PROP]) {
984 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
986 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
991 if (props[TIPC_NLA_PROP_PRIO])
992 prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
995 return tipc_enable_bearer(net, bearer, domain, prio, attrs);
998 int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
1003 err = __tipc_nl_bearer_enable(skb, info);
1009 int tipc_nl_bearer_add(struct sk_buff *skb, struct genl_info *info)
1013 struct tipc_bearer *b;
1014 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1015 struct net *net = sock_net(skb->sk);
1017 if (!info->attrs[TIPC_NLA_BEARER])
1020 err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX,
1021 info->attrs[TIPC_NLA_BEARER],
1022 tipc_nl_bearer_policy, info->extack);
1026 if (!attrs[TIPC_NLA_BEARER_NAME])
1028 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
1031 b = tipc_bearer_find(net, name);
1037 #ifdef CONFIG_TIPC_MEDIA_UDP
1038 if (attrs[TIPC_NLA_BEARER_UDP_OPTS]) {
1039 err = tipc_udp_nl_bearer_add(b,
1040 attrs[TIPC_NLA_BEARER_UDP_OPTS]);
1052 int __tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
1054 struct tipc_bearer *b;
1055 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1056 struct net *net = sock_net(skb->sk);
1060 if (!info->attrs[TIPC_NLA_BEARER])
1063 err = nla_parse_nested_deprecated(attrs, TIPC_NLA_BEARER_MAX,
1064 info->attrs[TIPC_NLA_BEARER],
1065 tipc_nl_bearer_policy, info->extack);
1069 if (!attrs[TIPC_NLA_BEARER_NAME])
1071 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
1073 b = tipc_bearer_find(net, name);
1077 if (attrs[TIPC_NLA_BEARER_PROP]) {
1078 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
1080 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
1085 if (props[TIPC_NLA_PROP_TOL]) {
1086 b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
1087 tipc_node_apply_property(net, b, TIPC_NLA_PROP_TOL);
1089 if (props[TIPC_NLA_PROP_PRIO])
1090 b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
1091 if (props[TIPC_NLA_PROP_WIN])
1092 b->max_win = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
1093 if (props[TIPC_NLA_PROP_MTU]) {
1094 if (b->media->type_id != TIPC_MEDIA_TYPE_UDP)
1096 #ifdef CONFIG_TIPC_MEDIA_UDP
1097 if (tipc_udp_mtu_bad(nla_get_u32
1098 (props[TIPC_NLA_PROP_MTU])))
1100 b->mtu = nla_get_u32(props[TIPC_NLA_PROP_MTU]);
1101 tipc_node_apply_property(net, b, TIPC_NLA_PROP_MTU);
1109 int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
1114 err = __tipc_nl_bearer_set(skb, info);
1120 static int __tipc_nl_add_media(struct tipc_nl_msg *msg,
1121 struct tipc_media *media, int nlflags)
1124 struct nlattr *attrs;
1125 struct nlattr *prop;
1127 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
1128 nlflags, TIPC_NL_MEDIA_GET);
1132 attrs = nla_nest_start_noflag(msg->skb, TIPC_NLA_MEDIA);
1136 if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name))
1139 prop = nla_nest_start_noflag(msg->skb, TIPC_NLA_MEDIA_PROP);
1142 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority))
1144 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance))
1146 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->max_win))
1148 if (media->type_id == TIPC_MEDIA_TYPE_UDP)
1149 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_MTU, media->mtu))
1152 nla_nest_end(msg->skb, prop);
1153 nla_nest_end(msg->skb, attrs);
1154 genlmsg_end(msg->skb, hdr);
1159 nla_nest_cancel(msg->skb, prop);
1161 nla_nest_cancel(msg->skb, attrs);
1163 genlmsg_cancel(msg->skb, hdr);
1168 int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb)
1171 int i = cb->args[0];
1172 struct tipc_nl_msg msg;
1178 msg.portid = NETLINK_CB(cb->skb).portid;
1179 msg.seq = cb->nlh->nlmsg_seq;
1182 for (; media_info_array[i] != NULL; i++) {
1183 err = __tipc_nl_add_media(&msg, media_info_array[i],
1194 int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info)
1198 struct tipc_nl_msg msg;
1199 struct tipc_media *media;
1200 struct sk_buff *rep;
1201 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1203 if (!info->attrs[TIPC_NLA_MEDIA])
1206 err = nla_parse_nested_deprecated(attrs, TIPC_NLA_MEDIA_MAX,
1207 info->attrs[TIPC_NLA_MEDIA],
1208 tipc_nl_media_policy, info->extack);
1212 if (!attrs[TIPC_NLA_MEDIA_NAME])
1214 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1216 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1221 msg.portid = info->snd_portid;
1222 msg.seq = info->snd_seq;
1225 media = tipc_media_find(name);
1231 err = __tipc_nl_add_media(&msg, media, 0);
1236 return genlmsg_reply(rep, info);
1244 int __tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
1248 struct tipc_media *m;
1249 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1251 if (!info->attrs[TIPC_NLA_MEDIA])
1254 err = nla_parse_nested_deprecated(attrs, TIPC_NLA_MEDIA_MAX,
1255 info->attrs[TIPC_NLA_MEDIA],
1256 tipc_nl_media_policy, info->extack);
1258 if (!attrs[TIPC_NLA_MEDIA_NAME])
1260 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1262 m = tipc_media_find(name);
1266 if (attrs[TIPC_NLA_MEDIA_PROP]) {
1267 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
1269 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP],
1274 if (props[TIPC_NLA_PROP_TOL])
1275 m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
1276 if (props[TIPC_NLA_PROP_PRIO])
1277 m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
1278 if (props[TIPC_NLA_PROP_WIN])
1279 m->max_win = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
1280 if (props[TIPC_NLA_PROP_MTU]) {
1281 if (m->type_id != TIPC_MEDIA_TYPE_UDP)
1283 #ifdef CONFIG_TIPC_MEDIA_UDP
1284 if (tipc_udp_mtu_bad(nla_get_u32
1285 (props[TIPC_NLA_PROP_MTU])))
1287 m->mtu = nla_get_u32(props[TIPC_NLA_PROP_MTU]);
1295 int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
1300 err = __tipc_nl_media_set(skb, info);