2 * net/tipc/bearer.c: TIPC bearer code
4 * Copyright (c) 1996-2006, 2013-2014, 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.
43 #define MAX_ADDR_STR 60
45 static struct tipc_media * const media_info_array[] = {
47 #ifdef CONFIG_TIPC_MEDIA_IB
53 static const struct nla_policy
54 tipc_nl_bearer_policy[TIPC_NLA_BEARER_MAX + 1] = {
55 [TIPC_NLA_BEARER_UNSPEC] = { .type = NLA_UNSPEC },
56 [TIPC_NLA_BEARER_NAME] = {
58 .len = TIPC_MAX_BEARER_NAME
60 [TIPC_NLA_BEARER_PROP] = { .type = NLA_NESTED },
61 [TIPC_NLA_BEARER_DOMAIN] = { .type = NLA_U32 }
64 static const struct nla_policy tipc_nl_media_policy[TIPC_NLA_MEDIA_MAX + 1] = {
65 [TIPC_NLA_MEDIA_UNSPEC] = { .type = NLA_UNSPEC },
66 [TIPC_NLA_MEDIA_NAME] = { .type = NLA_STRING },
67 [TIPC_NLA_MEDIA_PROP] = { .type = NLA_NESTED }
70 struct tipc_bearer __rcu *bearer_list[MAX_BEARERS + 1];
72 static void bearer_disable(struct tipc_bearer *b_ptr, bool shutting_down);
75 * tipc_media_find - locates specified media object by name
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
91 static struct tipc_media *media_find_id(u8 type)
95 for (i = 0; media_info_array[i] != NULL; i++) {
96 if (media_info_array[i]->type_id == type)
99 return media_info_array[i];
103 * tipc_media_addr_printf - record media address in print buffer
105 void tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a)
107 char addr_str[MAX_ADDR_STR];
108 struct tipc_media *m_ptr;
111 m_ptr = media_find_id(a->media_id);
113 if (m_ptr && !m_ptr->addr2str(a, addr_str, sizeof(addr_str)))
114 ret = tipc_snprintf(buf, len, "%s(%s)", m_ptr->name, addr_str);
118 ret = tipc_snprintf(buf, len, "UNKNOWN(%u)", a->media_id);
119 for (i = 0; i < sizeof(a->value); i++)
120 ret += tipc_snprintf(buf - ret, len + ret,
121 "-%02x", a->value[i]);
126 * tipc_media_get_names - record names of registered media in buffer
128 struct sk_buff *tipc_media_get_names(void)
133 buf = tipc_cfg_reply_alloc(MAX_MEDIA * TLV_SPACE(TIPC_MAX_MEDIA_NAME));
137 for (i = 0; media_info_array[i] != NULL; i++) {
138 tipc_cfg_append_tlv(buf, TIPC_TLV_MEDIA_NAME,
139 media_info_array[i]->name,
140 strlen(media_info_array[i]->name) + 1);
146 * bearer_name_validate - validate & (optionally) deconstruct bearer name
147 * @name: ptr to bearer name string
148 * @name_parts: ptr to area for bearer name components (or NULL if not needed)
150 * Returns 1 if bearer name is valid, otherwise 0.
152 static int bearer_name_validate(const char *name,
153 struct tipc_bearer_names *name_parts)
155 char name_copy[TIPC_MAX_BEARER_NAME];
161 /* copy bearer name & ensure length is OK */
162 name_copy[TIPC_MAX_BEARER_NAME - 1] = 0;
163 /* need above in case non-Posix strncpy() doesn't pad with nulls */
164 strncpy(name_copy, name, TIPC_MAX_BEARER_NAME);
165 if (name_copy[TIPC_MAX_BEARER_NAME - 1] != 0)
168 /* ensure all component parts of bearer name are present */
169 media_name = name_copy;
170 if_name = strchr(media_name, ':');
174 media_len = if_name - media_name;
175 if_len = strlen(if_name) + 1;
177 /* validate component parts of bearer name */
178 if ((media_len <= 1) || (media_len > TIPC_MAX_MEDIA_NAME) ||
179 (if_len <= 1) || (if_len > TIPC_MAX_IF_NAME))
182 /* return bearer name components, if necessary */
184 strcpy(name_parts->media_name, media_name);
185 strcpy(name_parts->if_name, if_name);
191 * tipc_bearer_find - locates bearer object with matching bearer name
193 struct tipc_bearer *tipc_bearer_find(const char *name)
195 struct tipc_bearer *b_ptr;
198 for (i = 0; i < MAX_BEARERS; i++) {
199 b_ptr = rtnl_dereference(bearer_list[i]);
200 if (b_ptr && (!strcmp(b_ptr->name, name)))
207 * tipc_bearer_get_names - record names of bearers in buffer
209 struct sk_buff *tipc_bearer_get_names(void)
212 struct tipc_bearer *b;
215 buf = tipc_cfg_reply_alloc(MAX_BEARERS * TLV_SPACE(TIPC_MAX_BEARER_NAME));
219 for (i = 0; media_info_array[i] != NULL; i++) {
220 for (j = 0; j < MAX_BEARERS; j++) {
221 b = rtnl_dereference(bearer_list[j]);
224 if (b->media == media_info_array[i]) {
225 tipc_cfg_append_tlv(buf, TIPC_TLV_BEARER_NAME,
227 strlen(b->name) + 1);
234 void tipc_bearer_add_dest(u32 bearer_id, u32 dest)
236 struct tipc_bearer *b_ptr;
239 b_ptr = rcu_dereference_rtnl(bearer_list[bearer_id]);
241 tipc_bcbearer_sort(&b_ptr->nodes, dest, true);
242 tipc_disc_add_dest(b_ptr->link_req);
247 void tipc_bearer_remove_dest(u32 bearer_id, u32 dest)
249 struct tipc_bearer *b_ptr;
252 b_ptr = rcu_dereference_rtnl(bearer_list[bearer_id]);
254 tipc_bcbearer_sort(&b_ptr->nodes, dest, false);
255 tipc_disc_remove_dest(b_ptr->link_req);
261 * tipc_enable_bearer - enable bearer with the given name
263 int tipc_enable_bearer(const char *name, u32 disc_domain, u32 priority)
265 struct tipc_bearer *b_ptr;
266 struct tipc_media *m_ptr;
267 struct tipc_bearer_names b_names;
268 char addr_string[16];
274 if (!tipc_own_addr) {
275 pr_warn("Bearer <%s> rejected, not supported in standalone mode\n",
279 if (!bearer_name_validate(name, &b_names)) {
280 pr_warn("Bearer <%s> rejected, illegal name\n", name);
283 if (tipc_addr_domain_valid(disc_domain) &&
284 (disc_domain != tipc_own_addr)) {
285 if (tipc_in_scope(disc_domain, tipc_own_addr)) {
286 disc_domain = tipc_own_addr & TIPC_CLUSTER_MASK;
287 res = 0; /* accept any node in own cluster */
288 } else if (in_own_cluster_exact(disc_domain))
289 res = 0; /* accept specified node in own cluster */
292 pr_warn("Bearer <%s> rejected, illegal discovery domain\n",
296 if ((priority > TIPC_MAX_LINK_PRI) &&
297 (priority != TIPC_MEDIA_LINK_PRI)) {
298 pr_warn("Bearer <%s> rejected, illegal priority\n", name);
302 m_ptr = tipc_media_find(b_names.media_name);
304 pr_warn("Bearer <%s> rejected, media <%s> not registered\n",
305 name, b_names.media_name);
309 if (priority == TIPC_MEDIA_LINK_PRI)
310 priority = m_ptr->priority;
313 bearer_id = MAX_BEARERS;
315 for (i = MAX_BEARERS; i-- != 0; ) {
316 b_ptr = rtnl_dereference(bearer_list[i]);
321 if (!strcmp(name, b_ptr->name)) {
322 pr_warn("Bearer <%s> rejected, already enabled\n",
326 if ((b_ptr->priority == priority) &&
327 (++with_this_prio > 2)) {
328 if (priority-- == 0) {
329 pr_warn("Bearer <%s> rejected, duplicate priority\n",
333 pr_warn("Bearer <%s> priority adjustment required %u->%u\n",
334 name, priority + 1, priority);
338 if (bearer_id >= MAX_BEARERS) {
339 pr_warn("Bearer <%s> rejected, bearer limit reached (%u)\n",
344 b_ptr = kzalloc(sizeof(*b_ptr), GFP_ATOMIC);
348 strcpy(b_ptr->name, name);
349 b_ptr->media = m_ptr;
350 res = m_ptr->enable_media(b_ptr);
352 pr_warn("Bearer <%s> rejected, enable failure (%d)\n",
357 b_ptr->identity = bearer_id;
358 b_ptr->tolerance = m_ptr->tolerance;
359 b_ptr->window = m_ptr->window;
360 b_ptr->domain = disc_domain;
361 b_ptr->net_plane = bearer_id + 'A';
362 b_ptr->priority = priority;
364 res = tipc_disc_create(b_ptr, &b_ptr->bcast_addr);
366 bearer_disable(b_ptr, false);
367 pr_warn("Bearer <%s> rejected, discovery object creation failed\n",
372 rcu_assign_pointer(bearer_list[bearer_id], b_ptr);
374 pr_info("Enabled bearer <%s>, discovery domain %s, priority %u\n",
376 tipc_addr_string_fill(addr_string, disc_domain), priority);
381 * tipc_reset_bearer - Reset all links established over this bearer
383 static int tipc_reset_bearer(struct tipc_bearer *b_ptr)
385 pr_info("Resetting bearer <%s>\n", b_ptr->name);
386 tipc_link_reset_list(b_ptr->identity);
387 tipc_disc_reset(b_ptr);
394 * Note: This routine assumes caller holds RTNL lock.
396 static void bearer_disable(struct tipc_bearer *b_ptr, bool shutting_down)
400 pr_info("Disabling bearer <%s>\n", b_ptr->name);
401 b_ptr->media->disable_media(b_ptr);
403 tipc_link_delete_list(b_ptr->identity, shutting_down);
405 tipc_disc_delete(b_ptr->link_req);
407 for (i = 0; i < MAX_BEARERS; i++) {
408 if (b_ptr == rtnl_dereference(bearer_list[i])) {
409 RCU_INIT_POINTER(bearer_list[i], NULL);
413 kfree_rcu(b_ptr, rcu);
416 int tipc_disable_bearer(const char *name)
418 struct tipc_bearer *b_ptr;
421 b_ptr = tipc_bearer_find(name);
423 pr_warn("Attempt to disable unknown bearer <%s>\n", name);
426 bearer_disable(b_ptr, false);
432 int tipc_enable_l2_media(struct tipc_bearer *b)
434 struct net_device *dev;
435 char *driver_name = strchr((const char *)b->name, ':') + 1;
437 /* Find device with specified name */
438 dev = dev_get_by_name(&init_net, driver_name);
442 /* Associate TIPC bearer with L2 bearer */
443 rcu_assign_pointer(b->media_ptr, dev);
444 memset(&b->bcast_addr, 0, sizeof(b->bcast_addr));
445 memcpy(b->bcast_addr.value, dev->broadcast, b->media->hwaddr_len);
446 b->bcast_addr.media_id = b->media->type_id;
447 b->bcast_addr.broadcast = 1;
449 b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr);
450 rcu_assign_pointer(dev->tipc_ptr, b);
454 /* tipc_disable_l2_media - detach TIPC bearer from an L2 interface
456 * Mark L2 bearer as inactive so that incoming buffers are thrown away,
457 * then get worker thread to complete bearer cleanup. (Can't do cleanup
458 * here because cleanup code needs to sleep and caller holds spinlocks.)
460 void tipc_disable_l2_media(struct tipc_bearer *b)
462 struct net_device *dev;
464 dev = (struct net_device *)rtnl_dereference(b->media_ptr);
465 RCU_INIT_POINTER(b->media_ptr, NULL);
466 RCU_INIT_POINTER(dev->tipc_ptr, NULL);
472 * tipc_l2_send_msg - send a TIPC packet out over an L2 interface
473 * @buf: the packet to be sent
474 * @b_ptr: the bearer through which the packet is to be sent
475 * @dest: peer destination address
477 int tipc_l2_send_msg(struct sk_buff *buf, struct tipc_bearer *b,
478 struct tipc_media_addr *dest)
480 struct sk_buff *clone;
481 struct net_device *dev;
484 dev = (struct net_device *)rcu_dereference_rtnl(b->media_ptr);
488 clone = skb_clone(buf, GFP_ATOMIC);
492 delta = dev->hard_header_len - skb_headroom(buf);
494 pskb_expand_head(clone, SKB_DATA_ALIGN(delta), 0, GFP_ATOMIC)) {
499 skb_reset_network_header(clone);
501 clone->protocol = htons(ETH_P_TIPC);
502 dev_hard_header(clone, dev, ETH_P_TIPC, dest->value,
503 dev->dev_addr, clone->len);
504 dev_queue_xmit(clone);
508 /* tipc_bearer_send- sends buffer to destination over bearer
511 * The media send routine must not alter the buffer being passed in
512 * as it may be needed for later retransmission!
514 void tipc_bearer_send(u32 bearer_id, struct sk_buff *buf,
515 struct tipc_media_addr *dest)
517 struct tipc_bearer *b_ptr;
520 b_ptr = rcu_dereference_rtnl(bearer_list[bearer_id]);
522 b_ptr->media->send_msg(buf, b_ptr, dest);
527 * tipc_l2_rcv_msg - handle incoming TIPC message from an interface
528 * @buf: the received packet
529 * @dev: the net device that the packet was received on
530 * @pt: the packet_type structure which was used to register this handler
531 * @orig_dev: the original receive net device in case the device is a bond
533 * Accept only packets explicitly sent to this node, or broadcast packets;
534 * ignores packets sent using interface multicast, and traffic sent to other
535 * nodes (which can happen if interface is running in promiscuous mode).
537 static int tipc_l2_rcv_msg(struct sk_buff *buf, struct net_device *dev,
538 struct packet_type *pt, struct net_device *orig_dev)
540 struct tipc_bearer *b_ptr;
542 if (!net_eq(dev_net(dev), &init_net)) {
548 b_ptr = rcu_dereference_rtnl(dev->tipc_ptr);
550 if (likely(buf->pkt_type <= PACKET_BROADCAST)) {
552 tipc_rcv(buf, b_ptr);
554 return NET_RX_SUCCESS;
564 * tipc_l2_device_event - handle device events from network device
565 * @nb: the context of the notification
566 * @evt: the type of event
567 * @ptr: the net device that the event was on
569 * This function is called by the Ethernet driver in case of link
572 static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt,
575 struct tipc_bearer *b_ptr;
576 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
578 if (!net_eq(dev_net(dev), &init_net))
581 b_ptr = rtnl_dereference(dev->tipc_ptr);
585 b_ptr->mtu = dev->mtu;
589 if (netif_carrier_ok(dev))
592 case NETDEV_CHANGEMTU:
593 tipc_reset_bearer(b_ptr);
595 case NETDEV_CHANGEADDR:
596 b_ptr->media->raw2addr(b_ptr, &b_ptr->addr,
597 (char *)dev->dev_addr);
598 tipc_reset_bearer(b_ptr);
600 case NETDEV_UNREGISTER:
601 case NETDEV_CHANGENAME:
602 bearer_disable(b_ptr, false);
608 static struct packet_type tipc_packet_type __read_mostly = {
609 .type = htons(ETH_P_TIPC),
610 .func = tipc_l2_rcv_msg,
613 static struct notifier_block notifier = {
614 .notifier_call = tipc_l2_device_event,
618 int tipc_bearer_setup(void)
622 err = register_netdevice_notifier(¬ifier);
625 dev_add_pack(&tipc_packet_type);
629 void tipc_bearer_cleanup(void)
631 unregister_netdevice_notifier(¬ifier);
632 dev_remove_pack(&tipc_packet_type);
635 void tipc_bearer_stop(void)
637 struct tipc_bearer *b_ptr;
640 for (i = 0; i < MAX_BEARERS; i++) {
641 b_ptr = rtnl_dereference(bearer_list[i]);
643 bearer_disable(b_ptr, true);
644 bearer_list[i] = NULL;
649 /* Caller should hold rtnl_lock to protect the bearer */
650 static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg,
651 struct tipc_bearer *bearer)
654 struct nlattr *attrs;
657 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_v2_family,
658 NLM_F_MULTI, TIPC_NL_BEARER_GET);
662 attrs = nla_nest_start(msg->skb, TIPC_NLA_BEARER);
666 if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name))
669 prop = nla_nest_start(msg->skb, TIPC_NLA_BEARER_PROP);
672 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority))
674 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance))
676 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window))
679 nla_nest_end(msg->skb, prop);
680 nla_nest_end(msg->skb, attrs);
681 genlmsg_end(msg->skb, hdr);
686 nla_nest_cancel(msg->skb, prop);
688 nla_nest_cancel(msg->skb, attrs);
690 genlmsg_cancel(msg->skb, hdr);
695 int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb)
699 struct tipc_bearer *bearer;
700 struct tipc_nl_msg msg;
702 if (i == MAX_BEARERS)
706 msg.portid = NETLINK_CB(cb->skb).portid;
707 msg.seq = cb->nlh->nlmsg_seq;
710 for (i = 0; i < MAX_BEARERS; i++) {
711 bearer = rtnl_dereference(bearer_list[i]);
715 err = __tipc_nl_add_bearer(&msg, bearer);
725 int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info)
730 struct tipc_bearer *bearer;
731 struct tipc_nl_msg msg;
732 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
734 if (!info->attrs[TIPC_NLA_BEARER])
737 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
738 info->attrs[TIPC_NLA_BEARER],
739 tipc_nl_bearer_policy);
743 if (!attrs[TIPC_NLA_BEARER_NAME])
745 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
747 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
752 msg.portid = info->snd_portid;
753 msg.seq = info->snd_seq;
756 bearer = tipc_bearer_find(name);
762 err = __tipc_nl_add_bearer(&msg, bearer);
767 return genlmsg_reply(rep, info);
775 int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info)
779 struct tipc_bearer *bearer;
780 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
782 if (!info->attrs[TIPC_NLA_BEARER])
785 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
786 info->attrs[TIPC_NLA_BEARER],
787 tipc_nl_bearer_policy);
791 if (!attrs[TIPC_NLA_BEARER_NAME])
794 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
797 bearer = tipc_bearer_find(name);
803 bearer_disable(bearer, false);
809 int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
813 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
817 prio = TIPC_MEDIA_LINK_PRI;
818 domain = tipc_own_addr & TIPC_CLUSTER_MASK;
820 if (!info->attrs[TIPC_NLA_BEARER])
823 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
824 info->attrs[TIPC_NLA_BEARER],
825 tipc_nl_bearer_policy);
829 if (!attrs[TIPC_NLA_BEARER_NAME])
832 bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
834 if (attrs[TIPC_NLA_BEARER_DOMAIN])
835 domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]);
837 if (attrs[TIPC_NLA_BEARER_PROP]) {
838 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
840 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
845 if (props[TIPC_NLA_PROP_PRIO])
846 prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
850 err = tipc_enable_bearer(bearer, domain, prio);
860 int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
864 struct tipc_bearer *b;
865 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
867 if (!info->attrs[TIPC_NLA_BEARER])
870 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
871 info->attrs[TIPC_NLA_BEARER],
872 tipc_nl_bearer_policy);
876 if (!attrs[TIPC_NLA_BEARER_NAME])
878 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
881 b = tipc_bearer_find(name);
887 if (attrs[TIPC_NLA_BEARER_PROP]) {
888 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
890 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
897 if (props[TIPC_NLA_PROP_TOL])
898 b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
899 if (props[TIPC_NLA_PROP_PRIO])
900 b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
901 if (props[TIPC_NLA_PROP_WIN])
902 b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
909 static int __tipc_nl_add_media(struct tipc_nl_msg *msg,
910 struct tipc_media *media)
913 struct nlattr *attrs;
916 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_v2_family,
917 NLM_F_MULTI, TIPC_NL_MEDIA_GET);
921 attrs = nla_nest_start(msg->skb, TIPC_NLA_MEDIA);
925 if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name))
928 prop = nla_nest_start(msg->skb, TIPC_NLA_MEDIA_PROP);
931 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority))
933 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance))
935 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window))
938 nla_nest_end(msg->skb, prop);
939 nla_nest_end(msg->skb, attrs);
940 genlmsg_end(msg->skb, hdr);
945 nla_nest_cancel(msg->skb, prop);
947 nla_nest_cancel(msg->skb, attrs);
949 genlmsg_cancel(msg->skb, hdr);
954 int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb)
958 struct tipc_nl_msg msg;
964 msg.portid = NETLINK_CB(cb->skb).portid;
965 msg.seq = cb->nlh->nlmsg_seq;
968 for (; media_info_array[i] != NULL; i++) {
969 err = __tipc_nl_add_media(&msg, media_info_array[i]);
979 int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info)
983 struct tipc_nl_msg msg;
984 struct tipc_media *media;
986 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
988 if (!info->attrs[TIPC_NLA_MEDIA])
991 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
992 info->attrs[TIPC_NLA_MEDIA],
993 tipc_nl_media_policy);
997 if (!attrs[TIPC_NLA_MEDIA_NAME])
999 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1001 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1006 msg.portid = info->snd_portid;
1007 msg.seq = info->snd_seq;
1010 media = tipc_media_find(name);
1016 err = __tipc_nl_add_media(&msg, media);
1021 return genlmsg_reply(rep, info);
1029 int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
1033 struct tipc_media *m;
1034 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1036 if (!info->attrs[TIPC_NLA_MEDIA])
1039 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
1040 info->attrs[TIPC_NLA_MEDIA],
1041 tipc_nl_media_policy);
1043 if (!attrs[TIPC_NLA_MEDIA_NAME])
1045 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1048 m = tipc_media_find(name);
1054 if (attrs[TIPC_NLA_MEDIA_PROP]) {
1055 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
1057 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP],
1064 if (props[TIPC_NLA_PROP_TOL])
1065 m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
1066 if (props[TIPC_NLA_PROP_PRIO])
1067 m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
1068 if (props[TIPC_NLA_PROP_WIN])
1069 m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);