drm/amdgpu/vg20:Restruct uvd to support multiple uvds
[muen/linux.git] / net / batman-adv / netlink.c
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 }