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->link_req);
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->link_req);
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 priority,
234 struct nlattr *attr[])
236 struct tipc_net *tn = net_generic(net, tipc_net_id);
237 struct tipc_bearer *b;
238 struct tipc_media *m;
239 struct tipc_bearer_names b_names;
241 char addr_string[16];
248 pr_warn("Bearer <%s> rejected, not supported in standalone mode\n",
252 if (!bearer_name_validate(name, &b_names)) {
253 pr_warn("Bearer <%s> rejected, illegal name\n", name);
256 if (tipc_addr_domain_valid(disc_domain) &&
257 (disc_domain != tn->own_addr)) {
258 if (tipc_in_scope(disc_domain, tn->own_addr)) {
259 disc_domain = tn->own_addr & TIPC_ZONE_CLUSTER_MASK;
260 res = 0; /* accept any node in own cluster */
261 } else if (in_own_cluster_exact(net, disc_domain))
262 res = 0; /* accept specified node in own cluster */
265 pr_warn("Bearer <%s> rejected, illegal discovery domain\n",
269 if ((priority > TIPC_MAX_LINK_PRI) &&
270 (priority != TIPC_MEDIA_LINK_PRI)) {
271 pr_warn("Bearer <%s> rejected, illegal priority\n", name);
275 m = tipc_media_find(b_names.media_name);
277 pr_warn("Bearer <%s> rejected, media <%s> not registered\n",
278 name, b_names.media_name);
282 if (priority == TIPC_MEDIA_LINK_PRI)
283 priority = m->priority;
286 bearer_id = MAX_BEARERS;
288 for (i = MAX_BEARERS; i-- != 0; ) {
289 b = rtnl_dereference(tn->bearer_list[i]);
294 if (!strcmp(name, b->name)) {
295 pr_warn("Bearer <%s> rejected, already enabled\n",
299 if ((b->priority == priority) &&
300 (++with_this_prio > 2)) {
301 if (priority-- == 0) {
302 pr_warn("Bearer <%s> rejected, duplicate priority\n",
306 pr_warn("Bearer <%s> priority adjustment required %u->%u\n",
307 name, priority + 1, priority);
311 if (bearer_id >= MAX_BEARERS) {
312 pr_warn("Bearer <%s> rejected, bearer limit reached (%u)\n",
317 b = kzalloc(sizeof(*b), GFP_ATOMIC);
321 strcpy(b->name, name);
323 res = m->enable_media(net, b, attr);
325 pr_warn("Bearer <%s> rejected, enable failure (%d)\n",
330 b->identity = bearer_id;
331 b->tolerance = m->tolerance;
332 b->window = m->window;
333 b->domain = disc_domain;
334 b->net_plane = bearer_id + 'A';
335 b->priority = priority;
336 test_and_set_bit_lock(0, &b->up);
338 res = tipc_disc_create(net, b, &b->bcast_addr, &skb);
340 bearer_disable(net, b);
341 pr_warn("Bearer <%s> rejected, discovery object creation failed\n",
346 rcu_assign_pointer(tn->bearer_list[bearer_id], b);
348 tipc_bearer_xmit_skb(net, bearer_id, skb, &b->bcast_addr);
350 if (tipc_mon_create(net, bearer_id))
353 pr_info("Enabled bearer <%s>, discovery domain %s, priority %u\n",
355 tipc_addr_string_fill(addr_string, disc_domain), priority);
360 * tipc_reset_bearer - Reset all links established over this bearer
362 static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b)
364 pr_info("Resetting bearer <%s>\n", b->name);
365 tipc_node_delete_links(net, b->identity);
366 tipc_disc_reset(net, b);
373 * Note: This routine assumes caller holds RTNL lock.
375 static void bearer_disable(struct net *net, struct tipc_bearer *b)
377 struct tipc_net *tn = tipc_net(net);
378 int bearer_id = b->identity;
380 pr_info("Disabling bearer <%s>\n", b->name);
381 clear_bit_unlock(0, &b->up);
382 tipc_node_delete_links(net, bearer_id);
383 b->media->disable_media(b);
384 RCU_INIT_POINTER(b->media_ptr, NULL);
386 tipc_disc_delete(b->link_req);
387 RCU_INIT_POINTER(tn->bearer_list[bearer_id], NULL);
389 tipc_mon_delete(net, bearer_id);
392 int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b,
393 struct nlattr *attr[])
395 struct net_device *dev;
396 char *driver_name = strchr((const char *)b->name, ':') + 1;
398 /* Find device with specified name */
399 dev = dev_get_by_name(net, driver_name);
402 if (tipc_mtu_bad(dev, 0)) {
407 /* Associate TIPC bearer with L2 bearer */
408 rcu_assign_pointer(b->media_ptr, dev);
410 b->pt.type = htons(ETH_P_TIPC);
411 b->pt.func = tipc_l2_rcv_msg;
412 dev_add_pack(&b->pt);
413 memset(&b->bcast_addr, 0, sizeof(b->bcast_addr));
414 memcpy(b->bcast_addr.value, dev->broadcast, b->media->hwaddr_len);
415 b->bcast_addr.media_id = b->media->type_id;
416 b->bcast_addr.broadcast = TIPC_BROADCAST_SUPPORT;
418 b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr);
419 rcu_assign_pointer(dev->tipc_ptr, b);
423 /* tipc_disable_l2_media - detach TIPC bearer from an L2 interface
425 * Mark L2 bearer as inactive so that incoming buffers are thrown away
427 void tipc_disable_l2_media(struct tipc_bearer *b)
429 struct net_device *dev;
431 dev = (struct net_device *)rtnl_dereference(b->media_ptr);
432 dev_remove_pack(&b->pt);
433 RCU_INIT_POINTER(dev->tipc_ptr, NULL);
439 * tipc_l2_send_msg - send a TIPC packet out over an L2 interface
440 * @skb: the packet to be sent
441 * @b: the bearer through which the packet is to be sent
442 * @dest: peer destination address
444 int tipc_l2_send_msg(struct net *net, struct sk_buff *skb,
445 struct tipc_bearer *b, struct tipc_media_addr *dest)
447 struct net_device *dev;
450 dev = (struct net_device *)rcu_dereference_rtnl(b->media_ptr);
454 delta = SKB_DATA_ALIGN(dev->hard_header_len - skb_headroom(skb));
455 if ((delta > 0) && pskb_expand_head(skb, delta, 0, GFP_ATOMIC)) {
459 skb_reset_network_header(skb);
461 skb->protocol = htons(ETH_P_TIPC);
462 dev_hard_header(skb, dev, ETH_P_TIPC, dest->value,
463 dev->dev_addr, skb->len);
468 bool tipc_bearer_bcast_support(struct net *net, u32 bearer_id)
471 struct tipc_bearer *b;
474 b = bearer_get(net, bearer_id);
476 supp = (b->bcast_addr.broadcast == TIPC_BROADCAST_SUPPORT);
481 int tipc_bearer_mtu(struct net *net, u32 bearer_id)
484 struct tipc_bearer *b;
487 b = rcu_dereference_rtnl(tipc_net(net)->bearer_list[bearer_id]);
494 /* tipc_bearer_xmit_skb - sends buffer to destination over bearer
496 void tipc_bearer_xmit_skb(struct net *net, u32 bearer_id,
498 struct tipc_media_addr *dest)
500 struct tipc_msg *hdr = buf_msg(skb);
501 struct tipc_bearer *b;
504 b = bearer_get(net, bearer_id);
505 if (likely(b && (test_bit(0, &b->up) || msg_is_reset(hdr))))
506 b->media->send_msg(net, skb, b, dest);
512 /* tipc_bearer_xmit() -send buffer to destination over bearer
514 void tipc_bearer_xmit(struct net *net, u32 bearer_id,
515 struct sk_buff_head *xmitq,
516 struct tipc_media_addr *dst)
518 struct tipc_bearer *b;
519 struct sk_buff *skb, *tmp;
521 if (skb_queue_empty(xmitq))
525 b = bearer_get(net, bearer_id);
527 __skb_queue_purge(xmitq);
528 skb_queue_walk_safe(xmitq, skb, tmp) {
529 __skb_dequeue(xmitq);
530 if (likely(test_bit(0, &b->up) || msg_is_reset(buf_msg(skb))))
531 b->media->send_msg(net, skb, b, dst);
538 /* tipc_bearer_bc_xmit() - broadcast buffers to all destinations
540 void tipc_bearer_bc_xmit(struct net *net, u32 bearer_id,
541 struct sk_buff_head *xmitq)
543 struct tipc_net *tn = tipc_net(net);
544 int net_id = tn->net_id;
545 struct tipc_bearer *b;
546 struct sk_buff *skb, *tmp;
547 struct tipc_msg *hdr;
550 b = bearer_get(net, bearer_id);
551 if (unlikely(!b || !test_bit(0, &b->up)))
552 __skb_queue_purge(xmitq);
553 skb_queue_walk_safe(xmitq, skb, tmp) {
555 msg_set_non_seq(hdr, 1);
556 msg_set_mc_netid(hdr, net_id);
557 __skb_dequeue(xmitq);
558 b->media->send_msg(net, skb, b, &b->bcast_addr);
564 * tipc_l2_rcv_msg - handle incoming TIPC message from an interface
565 * @buf: the received packet
566 * @dev: the net device that the packet was received on
567 * @pt: the packet_type structure which was used to register this handler
568 * @orig_dev: the original receive net device in case the device is a bond
570 * Accept only packets explicitly sent to this node, or broadcast packets;
571 * ignores packets sent using interface multicast, and traffic sent to other
572 * nodes (which can happen if interface is running in promiscuous mode).
574 static int tipc_l2_rcv_msg(struct sk_buff *skb, struct net_device *dev,
575 struct packet_type *pt, struct net_device *orig_dev)
577 struct tipc_bearer *b;
580 b = rcu_dereference_rtnl(dev->tipc_ptr) ?:
581 rcu_dereference_rtnl(orig_dev->tipc_ptr);
582 if (likely(b && test_bit(0, &b->up) &&
583 (skb->pkt_type <= PACKET_MULTICAST))) {
585 tipc_rcv(dev_net(b->pt.dev), skb, b);
587 return NET_RX_SUCCESS;
595 * tipc_l2_device_event - handle device events from network device
596 * @nb: the context of the notification
597 * @evt: the type of event
598 * @ptr: the net device that the event was on
600 * This function is called by the Ethernet driver in case of link
603 static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt,
606 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
607 struct net *net = dev_net(dev);
608 struct tipc_bearer *b;
610 b = rtnl_dereference(dev->tipc_ptr);
616 if (netif_carrier_ok(dev))
619 test_and_set_bit_lock(0, &b->up);
621 case NETDEV_GOING_DOWN:
622 clear_bit_unlock(0, &b->up);
623 tipc_reset_bearer(net, b);
625 case NETDEV_CHANGEMTU:
626 if (tipc_mtu_bad(dev, 0)) {
627 bearer_disable(net, b);
631 tipc_reset_bearer(net, b);
633 case NETDEV_CHANGEADDR:
634 b->media->raw2addr(b, &b->addr,
635 (char *)dev->dev_addr);
636 tipc_reset_bearer(net, b);
638 case NETDEV_UNREGISTER:
639 case NETDEV_CHANGENAME:
640 bearer_disable(net, b);
646 static struct notifier_block notifier = {
647 .notifier_call = tipc_l2_device_event,
651 int tipc_bearer_setup(void)
653 return register_netdevice_notifier(¬ifier);
656 void tipc_bearer_cleanup(void)
658 unregister_netdevice_notifier(¬ifier);
661 void tipc_bearer_stop(struct net *net)
663 struct tipc_net *tn = net_generic(net, tipc_net_id);
664 struct tipc_bearer *b;
667 for (i = 0; i < MAX_BEARERS; i++) {
668 b = rtnl_dereference(tn->bearer_list[i]);
670 bearer_disable(net, b);
671 tn->bearer_list[i] = NULL;
676 /* Caller should hold rtnl_lock to protect the bearer */
677 static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg,
678 struct tipc_bearer *bearer, int nlflags)
681 struct nlattr *attrs;
684 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
685 nlflags, TIPC_NL_BEARER_GET);
689 attrs = nla_nest_start(msg->skb, TIPC_NLA_BEARER);
693 if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name))
696 prop = nla_nest_start(msg->skb, TIPC_NLA_BEARER_PROP);
699 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority))
701 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance))
703 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window))
706 nla_nest_end(msg->skb, prop);
708 #ifdef CONFIG_TIPC_MEDIA_UDP
709 if (bearer->media->type_id == TIPC_MEDIA_TYPE_UDP) {
710 if (tipc_udp_nl_add_bearer_data(msg, bearer))
715 nla_nest_end(msg->skb, attrs);
716 genlmsg_end(msg->skb, hdr);
721 nla_nest_cancel(msg->skb, prop);
723 nla_nest_cancel(msg->skb, attrs);
725 genlmsg_cancel(msg->skb, hdr);
730 int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb)
734 struct tipc_bearer *bearer;
735 struct tipc_nl_msg msg;
736 struct net *net = sock_net(skb->sk);
737 struct tipc_net *tn = net_generic(net, tipc_net_id);
739 if (i == MAX_BEARERS)
743 msg.portid = NETLINK_CB(cb->skb).portid;
744 msg.seq = cb->nlh->nlmsg_seq;
747 for (i = 0; i < MAX_BEARERS; i++) {
748 bearer = rtnl_dereference(tn->bearer_list[i]);
752 err = __tipc_nl_add_bearer(&msg, bearer, NLM_F_MULTI);
762 int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info)
767 struct tipc_bearer *bearer;
768 struct tipc_nl_msg msg;
769 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
770 struct net *net = genl_info_net(info);
772 if (!info->attrs[TIPC_NLA_BEARER])
775 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
776 info->attrs[TIPC_NLA_BEARER],
777 tipc_nl_bearer_policy, info->extack);
781 if (!attrs[TIPC_NLA_BEARER_NAME])
783 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
785 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
790 msg.portid = info->snd_portid;
791 msg.seq = info->snd_seq;
794 bearer = tipc_bearer_find(net, name);
800 err = __tipc_nl_add_bearer(&msg, bearer, 0);
805 return genlmsg_reply(rep, info);
813 int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info)
817 struct tipc_bearer *bearer;
818 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
819 struct net *net = sock_net(skb->sk);
821 if (!info->attrs[TIPC_NLA_BEARER])
824 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
825 info->attrs[TIPC_NLA_BEARER],
826 tipc_nl_bearer_policy, info->extack);
830 if (!attrs[TIPC_NLA_BEARER_NAME])
833 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
836 bearer = tipc_bearer_find(net, name);
842 bearer_disable(net, bearer);
848 int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
852 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
853 struct net *net = sock_net(skb->sk);
854 struct tipc_net *tn = net_generic(net, tipc_net_id);
858 prio = TIPC_MEDIA_LINK_PRI;
859 domain = tn->own_addr & TIPC_ZONE_CLUSTER_MASK;
861 if (!info->attrs[TIPC_NLA_BEARER])
864 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
865 info->attrs[TIPC_NLA_BEARER],
866 tipc_nl_bearer_policy, info->extack);
870 if (!attrs[TIPC_NLA_BEARER_NAME])
873 bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
875 if (attrs[TIPC_NLA_BEARER_DOMAIN])
876 domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]);
878 if (attrs[TIPC_NLA_BEARER_PROP]) {
879 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
881 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
886 if (props[TIPC_NLA_PROP_PRIO])
887 prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
891 err = tipc_enable_bearer(net, bearer, domain, prio, attrs);
901 int tipc_nl_bearer_add(struct sk_buff *skb, struct genl_info *info)
905 struct tipc_bearer *b;
906 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
907 struct net *net = sock_net(skb->sk);
909 if (!info->attrs[TIPC_NLA_BEARER])
912 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
913 info->attrs[TIPC_NLA_BEARER],
914 tipc_nl_bearer_policy, info->extack);
918 if (!attrs[TIPC_NLA_BEARER_NAME])
920 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
923 b = tipc_bearer_find(net, name);
929 #ifdef CONFIG_TIPC_MEDIA_UDP
930 if (attrs[TIPC_NLA_BEARER_UDP_OPTS]) {
931 err = tipc_udp_nl_bearer_add(b,
932 attrs[TIPC_NLA_BEARER_UDP_OPTS]);
944 int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
948 struct tipc_bearer *b;
949 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
950 struct net *net = sock_net(skb->sk);
952 if (!info->attrs[TIPC_NLA_BEARER])
955 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
956 info->attrs[TIPC_NLA_BEARER],
957 tipc_nl_bearer_policy, info->extack);
961 if (!attrs[TIPC_NLA_BEARER_NAME])
963 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
966 b = tipc_bearer_find(net, name);
972 if (attrs[TIPC_NLA_BEARER_PROP]) {
973 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
975 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
982 if (props[TIPC_NLA_PROP_TOL])
983 b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
984 if (props[TIPC_NLA_PROP_PRIO])
985 b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
986 if (props[TIPC_NLA_PROP_WIN])
987 b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
994 static int __tipc_nl_add_media(struct tipc_nl_msg *msg,
995 struct tipc_media *media, int nlflags)
998 struct nlattr *attrs;
1001 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
1002 nlflags, TIPC_NL_MEDIA_GET);
1006 attrs = nla_nest_start(msg->skb, TIPC_NLA_MEDIA);
1010 if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name))
1013 prop = nla_nest_start(msg->skb, TIPC_NLA_MEDIA_PROP);
1016 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority))
1018 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance))
1020 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window))
1023 nla_nest_end(msg->skb, prop);
1024 nla_nest_end(msg->skb, attrs);
1025 genlmsg_end(msg->skb, hdr);
1030 nla_nest_cancel(msg->skb, prop);
1032 nla_nest_cancel(msg->skb, attrs);
1034 genlmsg_cancel(msg->skb, hdr);
1039 int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb)
1042 int i = cb->args[0];
1043 struct tipc_nl_msg msg;
1049 msg.portid = NETLINK_CB(cb->skb).portid;
1050 msg.seq = cb->nlh->nlmsg_seq;
1053 for (; media_info_array[i] != NULL; i++) {
1054 err = __tipc_nl_add_media(&msg, media_info_array[i],
1065 int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info)
1069 struct tipc_nl_msg msg;
1070 struct tipc_media *media;
1071 struct sk_buff *rep;
1072 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1074 if (!info->attrs[TIPC_NLA_MEDIA])
1077 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
1078 info->attrs[TIPC_NLA_MEDIA],
1079 tipc_nl_media_policy, info->extack);
1083 if (!attrs[TIPC_NLA_MEDIA_NAME])
1085 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1087 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1092 msg.portid = info->snd_portid;
1093 msg.seq = info->snd_seq;
1096 media = tipc_media_find(name);
1102 err = __tipc_nl_add_media(&msg, media, 0);
1107 return genlmsg_reply(rep, info);
1115 int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
1119 struct tipc_media *m;
1120 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1122 if (!info->attrs[TIPC_NLA_MEDIA])
1125 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
1126 info->attrs[TIPC_NLA_MEDIA],
1127 tipc_nl_media_policy, info->extack);
1129 if (!attrs[TIPC_NLA_MEDIA_NAME])
1131 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1134 m = tipc_media_find(name);
1140 if (attrs[TIPC_NLA_MEDIA_PROP]) {
1141 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
1143 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP],
1150 if (props[TIPC_NLA_PROP_TOL])
1151 m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
1152 if (props[TIPC_NLA_PROP_PRIO])
1153 m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
1154 if (props[TIPC_NLA_PROP_WIN])
1155 m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);