1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (C) 2016-2018 B.A.T.M.A.N. contributors:
3 *
4 * Matthias Schiffer
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of version 2 of the GNU General Public
8 * License as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, see <http://www.gnu.org/licenses/>.
17 */
18
19 #include "netlink.h"
20 #include "main.h"
21
22 #include <linux/atomic.h>
23 #include <linux/byteorder/generic.h>
24 #include <linux/cache.h>
25 #include <linux/errno.h>
26 #include <linux/export.h>
27 #include <linux/genetlink.h>
28 #include <linux/gfp.h>
29 #include <linux/if_ether.h>
30 #include <linux/init.h>
31 #include <linux/kernel.h>
32 #include <linux/netdevice.h>
33 #include <linux/netlink.h>
34 #include <linux/printk.h>
35 #include <linux/rculist.h>
36 #include <linux/rcupdate.h>
37 #include <linux/skbuff.h>
38 #include <linux/stddef.h>
39 #include <linux/types.h>
40 #include <net/genetlink.h>
41 #include <net/netlink.h>
42 #include <net/sock.h>
43 #include <uapi/linux/batadv_packet.h>
44 #include <uapi/linux/batman_adv.h>
45
46 #include "bat_algo.h"
47 #include "bridge_loop_avoidance.h"
48 #include "distributed-arp-table.h"
49 #include "gateway_client.h"
50 #include "hard-interface.h"
51 #include "multicast.h"
52 #include "originator.h"
53 #include "soft-interface.h"
54 #include "tp_meter.h"
55 #include "translation-table.h"
56
57 struct genl_family batadv_netlink_family;
58
59 /* multicast groups */
60 enum batadv_netlink_multicast_groups {
61 BATADV_NL_MCGRP_TPMETER,
62 };
63
64 static const struct genl_multicast_group batadv_netlink_mcgrps[] = {
65 [BATADV_NL_MCGRP_TPMETER] = { .name = BATADV_NL_MCAST_GROUP_TPMETER },
66 };
67
68 static const struct nla_policy batadv_netlink_policy[NUM_BATADV_ATTR] = {
69 [BATADV_ATTR_VERSION] = { .type = NLA_STRING },
70 [BATADV_ATTR_ALGO_NAME] = { .type = NLA_STRING },
71 [BATADV_ATTR_MESH_IFINDEX] = { .type = NLA_U32 },
72 [BATADV_ATTR_MESH_IFNAME] = { .type = NLA_STRING },
73 [BATADV_ATTR_MESH_ADDRESS] = { .len = ETH_ALEN },
74 [BATADV_ATTR_HARD_IFINDEX] = { .type = NLA_U32 },
75 [BATADV_ATTR_HARD_IFNAME] = { .type = NLA_STRING },
76 [BATADV_ATTR_HARD_ADDRESS] = { .len = ETH_ALEN },
77 [BATADV_ATTR_ORIG_ADDRESS] = { .len = ETH_ALEN },
78 [BATADV_ATTR_TPMETER_RESULT] = { .type = NLA_U8 },
79 [BATADV_ATTR_TPMETER_TEST_TIME] = { .type = NLA_U32 },
80 [BATADV_ATTR_TPMETER_BYTES] = { .type = NLA_U64 },
81 [BATADV_ATTR_TPMETER_COOKIE] = { .type = NLA_U32 },
82 [BATADV_ATTR_ACTIVE] = { .type = NLA_FLAG },
83 [BATADV_ATTR_TT_ADDRESS] = { .len = ETH_ALEN },
84 [BATADV_ATTR_TT_TTVN] = { .type = NLA_U8 },
85 [BATADV_ATTR_TT_LAST_TTVN] = { .type = NLA_U8 },
86 [BATADV_ATTR_TT_CRC32] = { .type = NLA_U32 },
87 [BATADV_ATTR_TT_VID] = { .type = NLA_U16 },
88 [BATADV_ATTR_TT_FLAGS] = { .type = NLA_U32 },
89 [BATADV_ATTR_FLAG_BEST] = { .type = NLA_FLAG },
90 [BATADV_ATTR_LAST_SEEN_MSECS] = { .type = NLA_U32 },
91 [BATADV_ATTR_NEIGH_ADDRESS] = { .len = ETH_ALEN },
92 [BATADV_ATTR_TQ] = { .type = NLA_U8 },
93 [BATADV_ATTR_THROUGHPUT] = { .type = NLA_U32 },
94 [BATADV_ATTR_BANDWIDTH_UP] = { .type = NLA_U32 },
95 [BATADV_ATTR_BANDWIDTH_DOWN] = { .type = NLA_U32 },
96 [BATADV_ATTR_ROUTER] = { .len = ETH_ALEN },
97 [BATADV_ATTR_BLA_OWN] = { .type = NLA_FLAG },
98 [BATADV_ATTR_BLA_ADDRESS] = { .len = ETH_ALEN },
99 [BATADV_ATTR_BLA_VID] = { .type = NLA_U16 },
100 [BATADV_ATTR_BLA_BACKBONE] = { .len = ETH_ALEN },
101 [BATADV_ATTR_BLA_CRC] = { .type = NLA_U16 },
102 [BATADV_ATTR_DAT_CACHE_IP4ADDRESS] = { .type = NLA_U32 },
103 [BATADV_ATTR_DAT_CACHE_HWADDRESS] = { .len = ETH_ALEN },
104 [BATADV_ATTR_DAT_CACHE_VID] = { .type = NLA_U16 },
105 [BATADV_ATTR_MCAST_FLAGS] = { .type = NLA_U32 },
106 [BATADV_ATTR_MCAST_FLAGS_PRIV] = { .type = NLA_U32 },
107 };
108
109 /**
110 * batadv_netlink_get_ifindex() - Extract an interface index from a message
111 * @nlh: Message header
112 * @attrtype: Attribute which holds an interface index
113 *
114 * Return: interface index, or 0.
115 */
116 int
117 batadv_netlink_get_ifindex(const struct nlmsghdr *nlh, int attrtype)
118 {
119 struct nlattr *attr = nlmsg_find_attr(nlh, GENL_HDRLEN, attrtype);
120
121 return attr ? nla_get_u32(attr) : 0;
122 }
123
124 /**
125 * batadv_netlink_mesh_info_put() - fill in generic information about mesh
126 * interface
127 * @msg: netlink message to be sent back
128 * @soft_iface: interface for which the data should be taken
129 *
130 * Return: 0 on success, < 0 on error
131 */
132 static int
133 batadv_netlink_mesh_info_put(struct sk_buff *msg, struct net_device *soft_iface)
134 {
135 struct batadv_priv *bat_priv = netdev_priv(soft_iface);
136 struct batadv_hard_iface *primary_if = NULL;
137 struct net_device *hard_iface;
138 int ret = -ENOBUFS;
139
140 if (nla_put_string(msg, BATADV_ATTR_VERSION, BATADV_SOURCE_VERSION) ||
141 nla_put_string(msg, BATADV_ATTR_ALGO_NAME,
142 bat_priv->algo_ops->name) ||
143 nla_put_u32(msg, BATADV_ATTR_MESH_IFINDEX, soft_iface->ifindex) ||
144 nla_put_string(msg, BATADV_ATTR_MESH_IFNAME, soft_iface->name) ||
145 nla_put(msg, BATADV_ATTR_MESH_ADDRESS, ETH_ALEN,
146 soft_iface->dev_addr) ||
147 nla_put_u8(msg, BATADV_ATTR_TT_TTVN,
148 (u8)atomic_read(&bat_priv->tt.vn)))
149 goto out;
150
151 #ifdef CONFIG_BATMAN_ADV_BLA
152 if (nla_put_u16(msg, BATADV_ATTR_BLA_CRC,
153 ntohs(bat_priv->bla.claim_dest.group)))
154 goto out;
155 #endif
156
157 if (batadv_mcast_mesh_info_put(msg, bat_priv))
158 goto out;
159
160 primary_if = batadv_primary_if_get_selected(bat_priv);
161 if (primary_if && primary_if->if_status == BATADV_IF_ACTIVE) {
162 hard_iface = primary_if->net_dev;
163
164 if (nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX,
165 hard_iface->ifindex) ||
166 nla_put_string(msg, BATADV_ATTR_HARD_IFNAME,
167 hard_iface->name) ||
168 nla_put(msg, BATADV_ATTR_HARD_ADDRESS, ETH_ALEN,
169 hard_iface->dev_addr))
170 goto out;
171 }
172
173 ret = 0;
174
175 out:
176 if (primary_if)
177 batadv_hardif_put(primary_if);
178
179 return ret;
180 }
181
182 /**
183 * batadv_netlink_get_mesh_info() - handle incoming BATADV_CMD_GET_MESH_INFO
184 * netlink request
185 * @skb: received netlink message
186 * @info: receiver information
187 *
188 * Return: 0 on success, < 0 on error
189 */
190 static int
191 batadv_netlink_get_mesh_info(struct sk_buff *skb, struct genl_info *info)
192 {
193 struct net *net = genl_info_net(info);
194 struct net_device *soft_iface;
195 struct sk_buff *msg = NULL;
196 void *msg_head;
197 int ifindex;
198 int ret;
199
200 if (!info->attrs[BATADV_ATTR_MESH_IFINDEX])
201 return -EINVAL;
202
203 ifindex = nla_get_u32(info->attrs[BATADV_ATTR_MESH_IFINDEX]);
204 if (!ifindex)
205 return -EINVAL;
206
207 soft_iface = dev_get_by_index(net, ifindex);
208 if (!soft_iface || !batadv_softif_is_valid(soft_iface)) {
209 ret = -ENODEV;
210 goto out;
211 }
212
213 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
214 if (!msg) {
215 ret = -ENOMEM;
216 goto out;
217 }
218
219 msg_head = genlmsg_put(msg, info->snd_portid, info->snd_seq,
220 &batadv_netlink_family, 0,
221 BATADV_CMD_GET_MESH_INFO);
222 if (!msg_head) {
223 ret = -ENOBUFS;
224 goto out;
225 }
226
227 ret = batadv_netlink_mesh_info_put(msg, soft_iface);
228
229 out:
230 if (soft_iface)
231 dev_put(soft_iface);
232
233 if (ret) {
234 if (msg)
235 nlmsg_free(msg);
236 return ret;
237 }
238
239 genlmsg_end(msg, msg_head);
240 return genlmsg_reply(msg, info);
241 }
242
243 /**
244 * batadv_netlink_tp_meter_put() - Fill information of started tp_meter session
245 * @msg: netlink message to be sent back
246 * @cookie: tp meter session cookie
247 *
248 * Return: 0 on success, < 0 on error
249 */
250 static int
251 batadv_netlink_tp_meter_put(struct sk_buff *msg, u32 cookie)
252 {
253 if (nla_put_u32(msg, BATADV_ATTR_TPMETER_COOKIE, cookie))
254 return -ENOBUFS;
255
256 return 0;
257 }
258
259 /**
260 * batadv_netlink_tpmeter_notify() - send tp_meter result via netlink to client
261 * @bat_priv: the bat priv with all the soft interface information
262 * @dst: destination of tp_meter session
263 * @result: reason for tp meter session stop
264 * @test_time: total time ot the tp_meter session
265 * @total_bytes: bytes acked to the receiver
266 * @cookie: cookie of tp_meter session
267 *
268 * Return: 0 on success, < 0 on error
269 */
270 int batadv_netlink_tpmeter_notify(struct batadv_priv *bat_priv, const u8 *dst,
271 u8 result, u32 test_time, u64 total_bytes,
272 u32 cookie)
273 {
274 struct sk_buff *msg;
275 void *hdr;
276 int ret;
277
278 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
279 if (!msg)
280 return -ENOMEM;
281
282 hdr = genlmsg_put(msg, 0, 0, &batadv_netlink_family, 0,
283 BATADV_CMD_TP_METER);
284 if (!hdr) {
285 ret = -ENOBUFS;
286 goto err_genlmsg;
287 }
288
289 if (nla_put_u32(msg, BATADV_ATTR_TPMETER_COOKIE, cookie))
290 goto nla_put_failure;
291
292 if (nla_put_u32(msg, BATADV_ATTR_TPMETER_TEST_TIME, test_time))
293 goto nla_put_failure;
294
295 if (nla_put_u64_64bit(msg, BATADV_ATTR_TPMETER_BYTES, total_bytes,
296 BATADV_ATTR_PAD))
297 goto nla_put_failure;
298
299 if (nla_put_u8(msg, BATADV_ATTR_TPMETER_RESULT, result))
300 goto nla_put_failure;
301
302 if (nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN, dst))
303 goto nla_put_failure;
304
305 genlmsg_end(msg, hdr);
306
307 genlmsg_multicast_netns(&batadv_netlink_family,
308 dev_net(bat_priv->soft_iface), msg, 0,
309 BATADV_NL_MCGRP_TPMETER, GFP_KERNEL);
310
311 return 0;
312
313 nla_put_failure:
314 genlmsg_cancel(msg, hdr);
315 ret = -EMSGSIZE;
316
317 err_genlmsg:
318 nlmsg_free(msg);
319 return ret;
320 }
321
322 /**
323 * batadv_netlink_tp_meter_start() - Start a new tp_meter session
324 * @skb: received netlink message
325 * @info: receiver information
326 *
327 * Return: 0 on success, < 0 on error
328 */
329 static int
330 batadv_netlink_tp_meter_start(struct sk_buff *skb, struct genl_info *info)
331 {
332 struct net *net = genl_info_net(info);
333 struct net_device *soft_iface;
334 struct batadv_priv *bat_priv;
335 struct sk_buff *msg = NULL;
336 u32 test_length;
337 void *msg_head;
338 int ifindex;
339 u32 cookie;
340 u8 *dst;
341 int ret;
342
343 if (!info->attrs[BATADV_ATTR_MESH_IFINDEX])
344 return -EINVAL;
345
346 if (!info->attrs[BATADV_ATTR_ORIG_ADDRESS])
347 return -EINVAL;
348
349 if (!info->attrs[BATADV_ATTR_TPMETER_TEST_TIME])
350 return -EINVAL;
351
352 ifindex = nla_get_u32(info->attrs[BATADV_ATTR_MESH_IFINDEX]);
353 if (!ifindex)
354 return -EINVAL;
355
356 dst = nla_data(info->attrs[BATADV_ATTR_ORIG_ADDRESS]);
357
358 test_length = nla_get_u32(info->attrs[BATADV_ATTR_TPMETER_TEST_TIME]);
359
360 soft_iface = dev_get_by_index(net, ifindex);
361 if (!soft_iface || !batadv_softif_is_valid(soft_iface)) {
362 ret = -ENODEV;
363 goto out;
364 }
365
366 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
367 if (!msg) {
368 ret = -ENOMEM;
369 goto out;
370 }
371
372 msg_head = genlmsg_put(msg, info->snd_portid, info->snd_seq,
373 &batadv_netlink_family, 0,
374 BATADV_CMD_TP_METER);
375 if (!msg_head) {
376 ret = -ENOBUFS;
377 goto out;
378 }
379
380 bat_priv = netdev_priv(soft_iface);
381 batadv_tp_start(bat_priv, dst, test_length, &cookie);
382
383 ret = batadv_netlink_tp_meter_put(msg, cookie);
384
385 out:
386 if (soft_iface)
387 dev_put(soft_iface);
388
389 if (ret) {
390 if (msg)
391 nlmsg_free(msg);
392 return ret;
393 }
394
395 genlmsg_end(msg, msg_head);
396 return genlmsg_reply(msg, info);
397 }
398
399 /**
400 * batadv_netlink_tp_meter_start() - Cancel a running tp_meter session
401 * @skb: received netlink message
402 * @info: receiver information
403 *
404 * Return: 0 on success, < 0 on error
405 */
406 static int
407 batadv_netlink_tp_meter_cancel(struct sk_buff *skb, struct genl_info *info)
408 {
409 struct net *net = genl_info_net(info);
410 struct net_device *soft_iface;
411 struct batadv_priv *bat_priv;
412 int ifindex;
413 u8 *dst;
414 int ret = 0;
415
416 if (!info->attrs[BATADV_ATTR_MESH_IFINDEX])
417 return -EINVAL;
418
419 if (!info->attrs[BATADV_ATTR_ORIG_ADDRESS])
420 return -EINVAL;
421
422 ifindex = nla_get_u32(info->attrs[BATADV_ATTR_MESH_IFINDEX]);
423 if (!ifindex)
424 return -EINVAL;
425
426 dst = nla_data(info->attrs[BATADV_ATTR_ORIG_ADDRESS]);
427
428 soft_iface = dev_get_by_index(net, ifindex);
429 if (!soft_iface || !batadv_softif_is_valid(soft_iface)) {
430 ret = -ENODEV;
431 goto out;
432 }
433
434 bat_priv = netdev_priv(soft_iface);
435 batadv_tp_stop(bat_priv, dst, BATADV_TP_REASON_CANCEL);
436
437 out:
438 if (soft_iface)
439 dev_put(soft_iface);
440
441 return ret;
442 }
443
444 /**
445 * batadv_netlink_dump_hardif_entry() - Dump one hard interface into a message
446 * @msg: Netlink message to dump into
447 * @portid: Port making netlink request
448 * @seq: Sequence number of netlink message
449 * @hard_iface: Hard interface to dump
450 *
451 * Return: error code, or 0 on success
452 */
453 static int
454 batadv_netlink_dump_hardif_entry(struct sk_buff *msg, u32 portid, u32 seq,
455 struct batadv_hard_iface *hard_iface)
456 {
457 struct net_device *net_dev = hard_iface->net_dev;
458 void *hdr;
459
460 hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, NLM_F_MULTI,
461 BATADV_CMD_GET_HARDIFS);
462 if (!hdr)
463 return -EMSGSIZE;
464
465 if (nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX,
466 net_dev->ifindex) ||
467 nla_put_string(msg, BATADV_ATTR_HARD_IFNAME,
468 net_dev->name) ||
469 nla_put(msg, BATADV_ATTR_HARD_ADDRESS, ETH_ALEN,
470 net_dev->dev_addr))
471 goto nla_put_failure;
472
473 if (hard_iface->if_status == BATADV_IF_ACTIVE) {
474 if (nla_put_flag(msg, BATADV_ATTR_ACTIVE))
475 goto nla_put_failure;
476 }
477
478 genlmsg_end(msg, hdr);
479 return 0;
480
481 nla_put_failure:
482 genlmsg_cancel(msg, hdr);
483 return -EMSGSIZE;
484 }
485
486 /**
487 * batadv_netlink_dump_hardifs() - Dump all hard interface into a messages
488 * @msg: Netlink message to dump into
489 * @cb: Parameters from query
490 *
491 * Return: error code, or length of reply message on success
492 */
493 static int
494 batadv_netlink_dump_hardifs(struct sk_buff *msg, struct netlink_callback *cb)
495 {
496 struct net *net = sock_net(cb->skb->sk);
497 struct net_device *soft_iface;
498 struct batadv_hard_iface *hard_iface;
499 int ifindex;
500 int portid = NETLINK_CB(cb->skb).portid;
501 int seq = cb->nlh->nlmsg_seq;
502 int skip = cb->args[0];
503 int i = 0;
504
505 ifindex = batadv_netlink_get_ifindex(cb->nlh,
506 BATADV_ATTR_MESH_IFINDEX);
507 if (!ifindex)
508 return -EINVAL;
509
510 soft_iface = dev_get_by_index(net, ifindex);
511 if (!soft_iface)
512 return -ENODEV;
513
514 if (!batadv_softif_is_valid(soft_iface)) {
515 dev_put(soft_iface);
516 return -ENODEV;
517 }
518
519 rcu_read_lock();
520
521 list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) {
522 if (hard_iface->soft_iface != soft_iface)
523 continue;
524
525 if (i++ < skip)
526 continue;
527
528 if (batadv_netlink_dump_hardif_entry(msg, portid, seq,
529 hard_iface)) {
530 i--;
531 break;
532 }
533 }
534
535 rcu_read_unlock();
536
537 dev_put(soft_iface);
538
539 cb->args[0] = i;
540
541 return msg->len;
542 }
543
544 static const struct genl_ops batadv_netlink_ops[] = {
545 {
546 .cmd = BATADV_CMD_GET_MESH_INFO,
547 .flags = GENL_ADMIN_PERM,
548 .policy = batadv_netlink_policy,
549 .doit = batadv_netlink_get_mesh_info,
550 },
551 {
552 .cmd = BATADV_CMD_TP_METER,
553 .flags = GENL_ADMIN_PERM,
554 .policy = batadv_netlink_policy,
555 .doit = batadv_netlink_tp_meter_start,
556 },
557 {
558 .cmd = BATADV_CMD_TP_METER_CANCEL,
559 .flags = GENL_ADMIN_PERM,
560 .policy = batadv_netlink_policy,
561 .doit = batadv_netlink_tp_meter_cancel,
562 },
563 {
564 .cmd = BATADV_CMD_GET_ROUTING_ALGOS,
565 .flags = GENL_ADMIN_PERM,
566 .policy = batadv_netlink_policy,
567 .dumpit = batadv_algo_dump,
568 },
569 {
570 .cmd = BATADV_CMD_GET_HARDIFS,
571 .flags = GENL_ADMIN_PERM,
572 .policy = batadv_netlink_policy,
573 .dumpit = batadv_netlink_dump_hardifs,
574 },
575 {
576 .cmd = BATADV_CMD_GET_TRANSTABLE_LOCAL,
577 .flags = GENL_ADMIN_PERM,
578 .policy = batadv_netlink_policy,
579 .dumpit = batadv_tt_local_dump,
580 },
581 {
582 .cmd = BATADV_CMD_GET_TRANSTABLE_GLOBAL,
583 .flags = GENL_ADMIN_PERM,
584 .policy = batadv_netlink_policy,
585 .dumpit = batadv_tt_global_dump,
586 },
587 {
588 .cmd = BATADV_CMD_GET_ORIGINATORS,
589 .flags = GENL_ADMIN_PERM,
590 .policy = batadv_netlink_policy,
591 .dumpit = batadv_orig_dump,
592 },
593 {
594 .cmd = BATADV_CMD_GET_NEIGHBORS,
595 .flags = GENL_ADMIN_PERM,
596 .policy = batadv_netlink_policy,
597 .dumpit = batadv_hardif_neigh_dump,
598 },
599 {
600 .cmd = BATADV_CMD_GET_GATEWAYS,
601 .flags = GENL_ADMIN_PERM,
602 .policy = batadv_netlink_policy,
603 .dumpit = batadv_gw_dump,
604 },
605 {
606 .cmd = BATADV_CMD_GET_BLA_CLAIM,
607 .flags = GENL_ADMIN_PERM,
608 .policy = batadv_netlink_policy,
609 .dumpit = batadv_bla_claim_dump,
610 },
611 {
612 .cmd = BATADV_CMD_GET_BLA_BACKBONE,
613 .flags = GENL_ADMIN_PERM,
614 .policy = batadv_netlink_policy,
615 .dumpit = batadv_bla_backbone_dump,
616 },
617 {
618 .cmd = BATADV_CMD_GET_DAT_CACHE,
619 .flags = GENL_ADMIN_PERM,
620 .policy = batadv_netlink_policy,
621 .dumpit = batadv_dat_cache_dump,
622 },
623 {
624 .cmd = BATADV_CMD_GET_MCAST_FLAGS,
625 .flags = GENL_ADMIN_PERM,
626 .policy = batadv_netlink_policy,
627 .dumpit = batadv_mcast_flags_dump,
628 },
629
630 };
631
632 struct genl_family batadv_netlink_family __ro_after_init = {
633 .hdrsize = 0,
634 .name = BATADV_NL_NAME,
635 .version = 1,
636 .maxattr = BATADV_ATTR_MAX,
637 .netnsok = true,
638 .module = THIS_MODULE,
639 .ops = batadv_netlink_ops,
640 .n_ops = ARRAY_SIZE(batadv_netlink_ops),
641 .mcgrps = batadv_netlink_mcgrps,
642 .n_mcgrps = ARRAY_SIZE(batadv_netlink_mcgrps),
643 };
644
645 /**
646 * batadv_netlink_register() - register batadv genl netlink family
647 */
648 void __init batadv_netlink_register(void)
649 {
650 int ret;
651
652 ret = genl_register_family(&batadv_netlink_family);
653 if (ret)
654 pr_warn("unable to register netlink family");
655 }
656
657 /**
658 * batadv_netlink_unregister() - unregister batadv genl netlink family
659 */
660 void batadv_netlink_unregister(void)
661 {
662 genl_unregister_family(&batadv_netlink_family);
663 }
664
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