2 * net/tipc/bearer.c: TIPC bearer code
4 * Copyright (c) 1996-2006, 2013-2016, Ericsson AB
5 * Copyright (c) 2004-2006, 2010-2013, Wind River Systems
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
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12 * notice, this list of conditions and the following disclaimer.
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14 * notice, this list of conditions and the following disclaimer in the
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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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 NL_SET_ERR_MSG(extack, "Illegal name");
253 if (prio > TIPC_MAX_LINK_PRI && prio != TIPC_MEDIA_LINK_PRI) {
254 errstr = "illegal priority";
255 NL_SET_ERR_MSG(extack, "Illegal priority");
259 m = tipc_media_find(b_names.media_name);
261 errstr = "media not registered";
262 NL_SET_ERR_MSG(extack, "Media not registered");
266 if (prio == TIPC_MEDIA_LINK_PRI)
269 /* Check new bearer vs existing ones and find free bearer id if any */
270 bearer_id = MAX_BEARERS;
273 b = rtnl_dereference(tn->bearer_list[i]);
278 if (!strcmp(name, b->name)) {
279 errstr = "already enabled";
280 NL_SET_ERR_MSG(extack, "Already enabled");
284 if (b->priority == prio &&
285 (++with_this_prio > 2)) {
286 pr_warn("Bearer <%s>: already 2 bearers with priority %u\n",
289 if (prio == TIPC_MIN_LINK_PRI) {
290 errstr = "cannot adjust to lower";
291 NL_SET_ERR_MSG(extack, "Cannot adjust to lower");
295 pr_warn("Bearer <%s>: trying with adjusted priority\n",
298 bearer_id = MAX_BEARERS;
304 if (bearer_id >= MAX_BEARERS) {
305 errstr = "max 3 bearers permitted";
306 NL_SET_ERR_MSG(extack, "Max 3 bearers permitted");
310 b = kzalloc(sizeof(*b), GFP_ATOMIC);
314 strcpy(b->name, name);
316 res = m->enable_media(net, b, attr);
319 errstr = "failed to enable media";
320 NL_SET_ERR_MSG(extack, "Failed to enable media");
324 b->identity = bearer_id;
325 b->tolerance = m->tolerance;
326 b->window = m->window;
327 b->domain = disc_domain;
328 b->net_plane = bearer_id + 'A';
330 test_and_set_bit_lock(0, &b->up);
332 res = tipc_disc_create(net, b, &b->bcast_addr, &skb);
334 bearer_disable(net, b);
335 errstr = "failed to create discoverer";
336 NL_SET_ERR_MSG(extack, "Failed to create discoverer");
340 rcu_assign_pointer(tn->bearer_list[bearer_id], b);
342 tipc_bearer_xmit_skb(net, bearer_id, skb, &b->bcast_addr);
344 if (tipc_mon_create(net, bearer_id)) {
345 bearer_disable(net, b);
349 pr_info("Enabled bearer <%s>, priority %u\n", name, prio);
353 pr_warn("Enabling of bearer <%s> rejected, %s\n", name, errstr);
358 * tipc_reset_bearer - Reset all links established over this bearer
360 static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b)
362 pr_info("Resetting bearer <%s>\n", b->name);
363 tipc_node_delete_links(net, b->identity);
364 tipc_disc_reset(net, b);
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)) {
407 /* Autoconfigure own node identity if needed */
408 if (!tipc_own_id(net) && hwaddr_len <= NODE_ID_LEN) {
409 memcpy(node_id, dev->dev_addr, hwaddr_len);
410 tipc_net_init(net, node_id, 0);
412 if (!tipc_own_id(net)) {
414 pr_warn("Failed to obtain node identity\n");
418 /* Associate TIPC bearer with L2 bearer */
419 rcu_assign_pointer(b->media_ptr, dev);
421 b->pt.type = htons(ETH_P_TIPC);
422 b->pt.func = tipc_l2_rcv_msg;
423 dev_add_pack(&b->pt);
424 memset(&b->bcast_addr, 0, sizeof(b->bcast_addr));
425 memcpy(b->bcast_addr.value, dev->broadcast, hwaddr_len);
426 b->bcast_addr.media_id = b->media->type_id;
427 b->bcast_addr.broadcast = TIPC_BROADCAST_SUPPORT;
429 b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr);
430 rcu_assign_pointer(dev->tipc_ptr, b);
434 /* tipc_disable_l2_media - detach TIPC bearer from an L2 interface
436 * Mark L2 bearer as inactive so that incoming buffers are thrown away
438 void tipc_disable_l2_media(struct tipc_bearer *b)
440 struct net_device *dev;
442 dev = (struct net_device *)rtnl_dereference(b->media_ptr);
443 dev_remove_pack(&b->pt);
444 RCU_INIT_POINTER(dev->tipc_ptr, NULL);
450 * tipc_l2_send_msg - send a TIPC packet out over an L2 interface
451 * @skb: the packet to be sent
452 * @b: the bearer through which the packet is to be sent
453 * @dest: peer destination address
455 int tipc_l2_send_msg(struct net *net, struct sk_buff *skb,
456 struct tipc_bearer *b, struct tipc_media_addr *dest)
458 struct net_device *dev;
461 dev = (struct net_device *)rcu_dereference_rtnl(b->media_ptr);
465 delta = SKB_DATA_ALIGN(dev->hard_header_len - skb_headroom(skb));
466 if ((delta > 0) && pskb_expand_head(skb, delta, 0, GFP_ATOMIC)) {
470 skb_reset_network_header(skb);
472 skb->protocol = htons(ETH_P_TIPC);
473 dev_hard_header(skb, dev, ETH_P_TIPC, dest->value,
474 dev->dev_addr, skb->len);
479 bool tipc_bearer_bcast_support(struct net *net, u32 bearer_id)
482 struct tipc_bearer *b;
485 b = bearer_get(net, bearer_id);
487 supp = (b->bcast_addr.broadcast == TIPC_BROADCAST_SUPPORT);
492 int tipc_bearer_mtu(struct net *net, u32 bearer_id)
495 struct tipc_bearer *b;
498 b = rcu_dereference_rtnl(tipc_net(net)->bearer_list[bearer_id]);
505 /* tipc_bearer_xmit_skb - sends buffer to destination over bearer
507 void tipc_bearer_xmit_skb(struct net *net, u32 bearer_id,
509 struct tipc_media_addr *dest)
511 struct tipc_msg *hdr = buf_msg(skb);
512 struct tipc_bearer *b;
515 b = bearer_get(net, bearer_id);
516 if (likely(b && (test_bit(0, &b->up) || msg_is_reset(hdr))))
517 b->media->send_msg(net, skb, b, dest);
523 /* tipc_bearer_xmit() -send buffer to destination over bearer
525 void tipc_bearer_xmit(struct net *net, u32 bearer_id,
526 struct sk_buff_head *xmitq,
527 struct tipc_media_addr *dst)
529 struct tipc_bearer *b;
530 struct sk_buff *skb, *tmp;
532 if (skb_queue_empty(xmitq))
536 b = bearer_get(net, bearer_id);
538 __skb_queue_purge(xmitq);
539 skb_queue_walk_safe(xmitq, skb, tmp) {
540 __skb_dequeue(xmitq);
541 if (likely(test_bit(0, &b->up) || msg_is_reset(buf_msg(skb))))
542 b->media->send_msg(net, skb, b, dst);
549 /* tipc_bearer_bc_xmit() - broadcast buffers to all destinations
551 void tipc_bearer_bc_xmit(struct net *net, u32 bearer_id,
552 struct sk_buff_head *xmitq)
554 struct tipc_net *tn = tipc_net(net);
555 int net_id = tn->net_id;
556 struct tipc_bearer *b;
557 struct sk_buff *skb, *tmp;
558 struct tipc_msg *hdr;
561 b = bearer_get(net, bearer_id);
562 if (unlikely(!b || !test_bit(0, &b->up)))
563 __skb_queue_purge(xmitq);
564 skb_queue_walk_safe(xmitq, skb, tmp) {
566 msg_set_non_seq(hdr, 1);
567 msg_set_mc_netid(hdr, net_id);
568 __skb_dequeue(xmitq);
569 b->media->send_msg(net, skb, b, &b->bcast_addr);
575 * tipc_l2_rcv_msg - handle incoming TIPC message from an interface
576 * @buf: the received packet
577 * @dev: the net device that the packet was received on
578 * @pt: the packet_type structure which was used to register this handler
579 * @orig_dev: the original receive net device in case the device is a bond
581 * Accept only packets explicitly sent to this node, or broadcast packets;
582 * ignores packets sent using interface multicast, and traffic sent to other
583 * nodes (which can happen if interface is running in promiscuous mode).
585 static int tipc_l2_rcv_msg(struct sk_buff *skb, struct net_device *dev,
586 struct packet_type *pt, struct net_device *orig_dev)
588 struct tipc_bearer *b;
591 b = rcu_dereference_rtnl(dev->tipc_ptr) ?:
592 rcu_dereference_rtnl(orig_dev->tipc_ptr);
593 if (likely(b && test_bit(0, &b->up) &&
594 (skb->pkt_type <= PACKET_MULTICAST))) {
596 tipc_rcv(dev_net(b->pt.dev), skb, b);
598 return NET_RX_SUCCESS;
606 * tipc_l2_device_event - handle device events from network device
607 * @nb: the context of the notification
608 * @evt: the type of event
609 * @ptr: the net device that the event was on
611 * This function is called by the Ethernet driver in case of link
614 static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt,
617 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
618 struct net *net = dev_net(dev);
619 struct tipc_bearer *b;
621 b = rtnl_dereference(dev->tipc_ptr);
627 if (netif_carrier_ok(dev) && netif_oper_up(dev)) {
628 test_and_set_bit_lock(0, &b->up);
632 case NETDEV_GOING_DOWN:
633 clear_bit_unlock(0, &b->up);
634 tipc_reset_bearer(net, b);
637 test_and_set_bit_lock(0, &b->up);
639 case NETDEV_CHANGEMTU:
640 if (tipc_mtu_bad(dev, 0)) {
641 bearer_disable(net, b);
645 tipc_reset_bearer(net, b);
647 case NETDEV_CHANGEADDR:
648 b->media->raw2addr(b, &b->addr,
649 (char *)dev->dev_addr);
650 tipc_reset_bearer(net, b);
652 case NETDEV_UNREGISTER:
653 case NETDEV_CHANGENAME:
654 bearer_disable(net, b);
660 static struct notifier_block notifier = {
661 .notifier_call = tipc_l2_device_event,
665 int tipc_bearer_setup(void)
667 return register_netdevice_notifier(¬ifier);
670 void tipc_bearer_cleanup(void)
672 unregister_netdevice_notifier(¬ifier);
675 void tipc_bearer_stop(struct net *net)
677 struct tipc_net *tn = net_generic(net, tipc_net_id);
678 struct tipc_bearer *b;
681 for (i = 0; i < MAX_BEARERS; i++) {
682 b = rtnl_dereference(tn->bearer_list[i]);
684 bearer_disable(net, b);
685 tn->bearer_list[i] = NULL;
690 /* Caller should hold rtnl_lock to protect the bearer */
691 static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg,
692 struct tipc_bearer *bearer, int nlflags)
695 struct nlattr *attrs;
698 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
699 nlflags, TIPC_NL_BEARER_GET);
703 attrs = nla_nest_start(msg->skb, TIPC_NLA_BEARER);
707 if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name))
710 prop = nla_nest_start(msg->skb, TIPC_NLA_BEARER_PROP);
713 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority))
715 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance))
717 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window))
719 if (bearer->media->type_id == TIPC_MEDIA_TYPE_UDP)
720 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_MTU, bearer->mtu))
723 nla_nest_end(msg->skb, prop);
725 #ifdef CONFIG_TIPC_MEDIA_UDP
726 if (bearer->media->type_id == TIPC_MEDIA_TYPE_UDP) {
727 if (tipc_udp_nl_add_bearer_data(msg, bearer))
732 nla_nest_end(msg->skb, attrs);
733 genlmsg_end(msg->skb, hdr);
738 nla_nest_cancel(msg->skb, prop);
740 nla_nest_cancel(msg->skb, attrs);
742 genlmsg_cancel(msg->skb, hdr);
747 int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb)
751 struct tipc_bearer *bearer;
752 struct tipc_nl_msg msg;
753 struct net *net = sock_net(skb->sk);
754 struct tipc_net *tn = net_generic(net, tipc_net_id);
756 if (i == MAX_BEARERS)
760 msg.portid = NETLINK_CB(cb->skb).portid;
761 msg.seq = cb->nlh->nlmsg_seq;
764 for (i = 0; i < MAX_BEARERS; i++) {
765 bearer = rtnl_dereference(tn->bearer_list[i]);
769 err = __tipc_nl_add_bearer(&msg, bearer, NLM_F_MULTI);
779 int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info)
784 struct tipc_bearer *bearer;
785 struct tipc_nl_msg msg;
786 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
787 struct net *net = genl_info_net(info);
789 if (!info->attrs[TIPC_NLA_BEARER])
792 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
793 info->attrs[TIPC_NLA_BEARER],
794 tipc_nl_bearer_policy, info->extack);
798 if (!attrs[TIPC_NLA_BEARER_NAME])
800 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
802 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
807 msg.portid = info->snd_portid;
808 msg.seq = info->snd_seq;
811 bearer = tipc_bearer_find(net, name);
814 NL_SET_ERR_MSG(info->extack, "Bearer not found");
818 err = __tipc_nl_add_bearer(&msg, bearer, 0);
823 return genlmsg_reply(rep, info);
831 int __tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info)
835 struct tipc_bearer *bearer;
836 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
837 struct net *net = sock_net(skb->sk);
839 if (!info->attrs[TIPC_NLA_BEARER])
842 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
843 info->attrs[TIPC_NLA_BEARER],
844 tipc_nl_bearer_policy, info->extack);
848 if (!attrs[TIPC_NLA_BEARER_NAME])
851 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
853 bearer = tipc_bearer_find(net, name);
855 NL_SET_ERR_MSG(info->extack, "Bearer not found");
859 bearer_disable(net, bearer);
864 int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info)
869 err = __tipc_nl_bearer_disable(skb, info);
875 int __tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
879 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
880 struct net *net = sock_net(skb->sk);
884 prio = TIPC_MEDIA_LINK_PRI;
886 if (!info->attrs[TIPC_NLA_BEARER])
889 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
890 info->attrs[TIPC_NLA_BEARER],
891 tipc_nl_bearer_policy, info->extack);
895 if (!attrs[TIPC_NLA_BEARER_NAME])
898 bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
900 if (attrs[TIPC_NLA_BEARER_DOMAIN])
901 domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]);
903 if (attrs[TIPC_NLA_BEARER_PROP]) {
904 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
906 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
911 if (props[TIPC_NLA_PROP_PRIO])
912 prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
915 return tipc_enable_bearer(net, bearer, domain, prio, attrs,
919 int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
924 err = __tipc_nl_bearer_enable(skb, info);
930 int tipc_nl_bearer_add(struct sk_buff *skb, struct genl_info *info)
934 struct tipc_bearer *b;
935 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
936 struct net *net = sock_net(skb->sk);
938 if (!info->attrs[TIPC_NLA_BEARER])
941 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
942 info->attrs[TIPC_NLA_BEARER],
943 tipc_nl_bearer_policy, info->extack);
947 if (!attrs[TIPC_NLA_BEARER_NAME])
949 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
952 b = tipc_bearer_find(net, name);
955 NL_SET_ERR_MSG(info->extack, "Bearer not found");
959 #ifdef CONFIG_TIPC_MEDIA_UDP
960 if (attrs[TIPC_NLA_BEARER_UDP_OPTS]) {
961 err = tipc_udp_nl_bearer_add(b,
962 attrs[TIPC_NLA_BEARER_UDP_OPTS]);
974 int __tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
976 struct tipc_bearer *b;
977 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
978 struct net *net = sock_net(skb->sk);
982 if (!info->attrs[TIPC_NLA_BEARER])
985 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
986 info->attrs[TIPC_NLA_BEARER],
987 tipc_nl_bearer_policy, info->extack);
991 if (!attrs[TIPC_NLA_BEARER_NAME])
993 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
995 b = tipc_bearer_find(net, name);
997 NL_SET_ERR_MSG(info->extack, "Bearer not found");
1001 if (attrs[TIPC_NLA_BEARER_PROP]) {
1002 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
1004 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
1009 if (props[TIPC_NLA_PROP_TOL]) {
1010 b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
1011 tipc_node_apply_property(net, b, TIPC_NLA_PROP_TOL);
1013 if (props[TIPC_NLA_PROP_PRIO])
1014 b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
1015 if (props[TIPC_NLA_PROP_WIN])
1016 b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
1017 if (props[TIPC_NLA_PROP_MTU]) {
1018 if (b->media->type_id != TIPC_MEDIA_TYPE_UDP) {
1019 NL_SET_ERR_MSG(info->extack,
1020 "MTU property is unsupported");
1023 #ifdef CONFIG_TIPC_MEDIA_UDP
1024 if (tipc_udp_mtu_bad(nla_get_u32
1025 (props[TIPC_NLA_PROP_MTU]))) {
1026 NL_SET_ERR_MSG(info->extack,
1027 "MTU value is out-of-range");
1030 b->mtu = nla_get_u32(props[TIPC_NLA_PROP_MTU]);
1031 tipc_node_apply_property(net, b, TIPC_NLA_PROP_MTU);
1039 int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
1044 err = __tipc_nl_bearer_set(skb, info);
1050 static int __tipc_nl_add_media(struct tipc_nl_msg *msg,
1051 struct tipc_media *media, int nlflags)
1054 struct nlattr *attrs;
1055 struct nlattr *prop;
1057 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
1058 nlflags, TIPC_NL_MEDIA_GET);
1062 attrs = nla_nest_start(msg->skb, TIPC_NLA_MEDIA);
1066 if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name))
1069 prop = nla_nest_start(msg->skb, TIPC_NLA_MEDIA_PROP);
1072 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority))
1074 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance))
1076 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window))
1078 if (media->type_id == TIPC_MEDIA_TYPE_UDP)
1079 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_MTU, media->mtu))
1082 nla_nest_end(msg->skb, prop);
1083 nla_nest_end(msg->skb, attrs);
1084 genlmsg_end(msg->skb, hdr);
1089 nla_nest_cancel(msg->skb, prop);
1091 nla_nest_cancel(msg->skb, attrs);
1093 genlmsg_cancel(msg->skb, hdr);
1098 int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb)
1101 int i = cb->args[0];
1102 struct tipc_nl_msg msg;
1108 msg.portid = NETLINK_CB(cb->skb).portid;
1109 msg.seq = cb->nlh->nlmsg_seq;
1112 for (; media_info_array[i] != NULL; i++) {
1113 err = __tipc_nl_add_media(&msg, media_info_array[i],
1124 int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info)
1128 struct tipc_nl_msg msg;
1129 struct tipc_media *media;
1130 struct sk_buff *rep;
1131 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1133 if (!info->attrs[TIPC_NLA_MEDIA])
1136 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
1137 info->attrs[TIPC_NLA_MEDIA],
1138 tipc_nl_media_policy, info->extack);
1142 if (!attrs[TIPC_NLA_MEDIA_NAME])
1144 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1146 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1151 msg.portid = info->snd_portid;
1152 msg.seq = info->snd_seq;
1155 media = tipc_media_find(name);
1157 NL_SET_ERR_MSG(info->extack, "Media not found");
1162 err = __tipc_nl_add_media(&msg, media, 0);
1167 return genlmsg_reply(rep, info);
1175 int __tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
1179 struct tipc_media *m;
1180 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1182 if (!info->attrs[TIPC_NLA_MEDIA])
1185 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
1186 info->attrs[TIPC_NLA_MEDIA],
1187 tipc_nl_media_policy, info->extack);
1189 if (!attrs[TIPC_NLA_MEDIA_NAME])
1191 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1193 m = tipc_media_find(name);
1195 NL_SET_ERR_MSG(info->extack, "Media not found");
1198 if (attrs[TIPC_NLA_MEDIA_PROP]) {
1199 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
1201 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP],
1206 if (props[TIPC_NLA_PROP_TOL])
1207 m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
1208 if (props[TIPC_NLA_PROP_PRIO])
1209 m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
1210 if (props[TIPC_NLA_PROP_WIN])
1211 m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
1212 if (props[TIPC_NLA_PROP_MTU]) {
1213 if (m->type_id != TIPC_MEDIA_TYPE_UDP) {
1214 NL_SET_ERR_MSG(info->extack,
1215 "MTU property is unsupported");
1218 #ifdef CONFIG_TIPC_MEDIA_UDP
1219 if (tipc_udp_mtu_bad(nla_get_u32
1220 (props[TIPC_NLA_PROP_MTU]))) {
1221 NL_SET_ERR_MSG(info->extack,
1222 "MTU value is out-of-range");
1225 m->mtu = nla_get_u32(props[TIPC_NLA_PROP_MTU]);
1233 int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
1238 err = __tipc_nl_media_set(skb, info);