net/batman-adv/netlink.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright (C) 2016-2017  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/fs.h>
  28 #include <linux/genetlink.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/batman_adv.h>
  44
  45 #include "bat_algo.h"
  46 #include "bridge_loop_avoidance.h"
  47 #include "gateway_client.h"
  48 #include "hard-interface.h"
  49 #include "originator.h"
  50 #include "packet.h"
  51 #include "soft-interface.h"
  52 #include "tp_meter.h"
  53 #include "translation-table.h"
  54
  55 struct genl_family batadv_netlink_family;
  56
  57 /* multicast groups */
  58 enum batadv_netlink_multicast_groups {
  59         BATADV_NL_MCGRP_TPMETER,
  60 };
  61
  62 static const struct genl_multicast_group batadv_netlink_mcgrps[] = {
  63         [BATADV_NL_MCGRP_TPMETER] = { .name = BATADV_NL_MCAST_GROUP_TPMETER },
  64 };
  65
  66 static const struct nla_policy batadv_netlink_policy[NUM_BATADV_ATTR] = {
  67         [BATADV_ATTR_VERSION]           = { .type = NLA_STRING },
  68         [BATADV_ATTR_ALGO_NAME]         = { .type = NLA_STRING },
  69         [BATADV_ATTR_MESH_IFINDEX]      = { .type = NLA_U32 },
  70         [BATADV_ATTR_MESH_IFNAME]       = { .type = NLA_STRING },
  71         [BATADV_ATTR_MESH_ADDRESS]      = { .len = ETH_ALEN },
  72         [BATADV_ATTR_HARD_IFINDEX]      = { .type = NLA_U32 },
  73         [BATADV_ATTR_HARD_IFNAME]       = { .type = NLA_STRING },
  74         [BATADV_ATTR_HARD_ADDRESS]      = { .len = ETH_ALEN },
  75         [BATADV_ATTR_ORIG_ADDRESS]      = { .len = ETH_ALEN },
  76         [BATADV_ATTR_TPMETER_RESULT]    = { .type = NLA_U8 },
  77         [BATADV_ATTR_TPMETER_TEST_TIME] = { .type = NLA_U32 },
  78         [BATADV_ATTR_TPMETER_BYTES]     = { .type = NLA_U64 },
  79         [BATADV_ATTR_TPMETER_COOKIE]    = { .type = NLA_U32 },
  80         [BATADV_ATTR_ACTIVE]            = { .type = NLA_FLAG },
  81         [BATADV_ATTR_TT_ADDRESS]        = { .len = ETH_ALEN },
  82         [BATADV_ATTR_TT_TTVN]           = { .type = NLA_U8 },
  83         [BATADV_ATTR_TT_LAST_TTVN]      = { .type = NLA_U8 },
  84         [BATADV_ATTR_TT_CRC32]          = { .type = NLA_U32 },
  85         [BATADV_ATTR_TT_VID]            = { .type = NLA_U16 },
  86         [BATADV_ATTR_TT_FLAGS]          = { .type = NLA_U32 },
  87         [BATADV_ATTR_FLAG_BEST]         = { .type = NLA_FLAG },
  88         [BATADV_ATTR_LAST_SEEN_MSECS]   = { .type = NLA_U32 },
  89         [BATADV_ATTR_NEIGH_ADDRESS]     = { .len = ETH_ALEN },
  90         [BATADV_ATTR_TQ]                = { .type = NLA_U8 },
  91         [BATADV_ATTR_THROUGHPUT]        = { .type = NLA_U32 },
  92         [BATADV_ATTR_BANDWIDTH_UP]      = { .type = NLA_U32 },
  93         [BATADV_ATTR_BANDWIDTH_DOWN]    = { .type = NLA_U32 },
  94         [BATADV_ATTR_ROUTER]            = { .len = ETH_ALEN },
  95         [BATADV_ATTR_BLA_OWN]           = { .type = NLA_FLAG },
  96         [BATADV_ATTR_BLA_ADDRESS]       = { .len = ETH_ALEN },
  97         [BATADV_ATTR_BLA_VID]           = { .type = NLA_U16 },
  98         [BATADV_ATTR_BLA_BACKBONE]      = { .len = ETH_ALEN },
  99         [BATADV_ATTR_BLA_CRC]           = { .type = NLA_U16 },
 100 };
 101
 102 /**
 103  * batadv_netlink_get_ifindex - Extract an interface index from a message
 104  * @nlh: Message header
 105  * @attrtype: Attribute which holds an interface index
 106  *
 107  * Return: interface index, or 0.
 108  */
 109 int
 110 batadv_netlink_get_ifindex(const struct nlmsghdr *nlh, int attrtype)
 111 {
 112         struct nlattr *attr = nlmsg_find_attr(nlh, GENL_HDRLEN, attrtype);
 113
 114         return attr ? nla_get_u32(attr) : 0;
 115 }
 116
 117 /**
 118  * batadv_netlink_mesh_info_put - fill in generic information about mesh
 119  *  interface
 120  * @msg: netlink message to be sent back
 121  * @soft_iface: interface for which the data should be taken
 122  *
 123  * Return: 0 on success, < 0 on error
 124  */
 125 static int
 126 batadv_netlink_mesh_info_put(struct sk_buff *msg, struct net_device *soft_iface)
 127 {
 128         struct batadv_priv *bat_priv = netdev_priv(soft_iface);
 129         struct batadv_hard_iface *primary_if = NULL;
 130         struct net_device *hard_iface;
 131         int ret = -ENOBUFS;
 132
 133         if (nla_put_string(msg, BATADV_ATTR_VERSION, BATADV_SOURCE_VERSION) ||
 134             nla_put_string(msg, BATADV_ATTR_ALGO_NAME,
 135                            bat_priv->algo_ops->name) ||
 136             nla_put_u32(msg, BATADV_ATTR_MESH_IFINDEX, soft_iface->ifindex) ||
 137             nla_put_string(msg, BATADV_ATTR_MESH_IFNAME, soft_iface->name) ||
 138             nla_put(msg, BATADV_ATTR_MESH_ADDRESS, ETH_ALEN,
 139                     soft_iface->dev_addr) ||
 140             nla_put_u8(msg, BATADV_ATTR_TT_TTVN,
 141                        (u8)atomic_read(&bat_priv->tt.vn)))
 142                 goto out;
 143
 144 #ifdef CONFIG_BATMAN_ADV_BLA
 145         if (nla_put_u16(msg, BATADV_ATTR_BLA_CRC,
 146                         ntohs(bat_priv->bla.claim_dest.group)))
 147                 goto out;
 148 #endif
 149
 150         primary_if = batadv_primary_if_get_selected(bat_priv);
 151         if (primary_if && primary_if->if_status == BATADV_IF_ACTIVE) {
 152                 hard_iface = primary_if->net_dev;
 153
 154                 if (nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX,
 155                                 hard_iface->ifindex) ||
 156                     nla_put_string(msg, BATADV_ATTR_HARD_IFNAME,
 157                                    hard_iface->name) ||
 158                     nla_put(msg, BATADV_ATTR_HARD_ADDRESS, ETH_ALEN,
 159                             hard_iface->dev_addr))
 160                         goto out;
 161         }
 162
 163         ret = 0;
 164
 165  out:
 166         if (primary_if)
 167                 batadv_hardif_put(primary_if);
 168
 169         return ret;
 170 }
 171
 172 /**
 173  * batadv_netlink_get_mesh_info - handle incoming BATADV_CMD_GET_MESH_INFO
 174  *  netlink request
 175  * @skb: received netlink message
 176  * @info: receiver information
 177  *
 178  * Return: 0 on success, < 0 on error
 179  */
 180 static int
 181 batadv_netlink_get_mesh_info(struct sk_buff *skb, struct genl_info *info)
 182 {
 183         struct net *net = genl_info_net(info);
 184         struct net_device *soft_iface;
 185         struct sk_buff *msg = NULL;
 186         void *msg_head;
 187         int ifindex;
 188         int ret;
 189
 190         if (!info->attrs[BATADV_ATTR_MESH_IFINDEX])
 191                 return -EINVAL;
 192
 193         ifindex = nla_get_u32(info->attrs[BATADV_ATTR_MESH_IFINDEX]);
 194         if (!ifindex)
 195                 return -EINVAL;
 196
 197         soft_iface = dev_get_by_index(net, ifindex);
 198         if (!soft_iface || !batadv_softif_is_valid(soft_iface)) {
 199                 ret = -ENODEV;
 200                 goto out;
 201         }
 202
 203         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 204         if (!msg) {
 205                 ret = -ENOMEM;
 206                 goto out;
 207         }
 208
 209         msg_head = genlmsg_put(msg, info->snd_portid, info->snd_seq,
 210                                &batadv_netlink_family, 0,
 211                                BATADV_CMD_GET_MESH_INFO);
 212         if (!msg_head) {
 213                 ret = -ENOBUFS;
 214                 goto out;
 215         }
 216
 217         ret = batadv_netlink_mesh_info_put(msg, soft_iface);
 218
 219  out:
 220         if (soft_iface)
 221                 dev_put(soft_iface);
 222
 223         if (ret) {
 224                 if (msg)
 225                         nlmsg_free(msg);
 226                 return ret;
 227         }
 228
 229         genlmsg_end(msg, msg_head);
 230         return genlmsg_reply(msg, info);
 231 }
 232
 233 /**
 234  * batadv_netlink_tp_meter_put - Fill information of started tp_meter session
 235  * @msg: netlink message to be sent back
 236  * @cookie: tp meter session cookie
 237  *
 238  *  Return: 0 on success, < 0 on error
 239  */
 240 static int
 241 batadv_netlink_tp_meter_put(struct sk_buff *msg, u32 cookie)
 242 {
 243         if (nla_put_u32(msg, BATADV_ATTR_TPMETER_COOKIE, cookie))
 244                 return -ENOBUFS;
 245
 246         return 0;
 247 }
 248
 249 /**
 250  * batadv_netlink_tpmeter_notify - send tp_meter result via netlink to client
 251  * @bat_priv: the bat priv with all the soft interface information
 252  * @dst: destination of tp_meter session
 253  * @result: reason for tp meter session stop
 254  * @test_time: total time ot the tp_meter session
 255  * @total_bytes: bytes acked to the receiver
 256  * @cookie: cookie of tp_meter session
 257  *
 258  * Return: 0 on success, < 0 on error
 259  */
 260 int batadv_netlink_tpmeter_notify(struct batadv_priv *bat_priv, const u8 *dst,
 261                                   u8 result, u32 test_time, u64 total_bytes,
 262                                   u32 cookie)
 263 {
 264         struct sk_buff *msg;
 265         void *hdr;
 266         int ret;
 267
 268         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 269         if (!msg)
 270                 return -ENOMEM;
 271
 272         hdr = genlmsg_put(msg, 0, 0, &batadv_netlink_family, 0,
 273                           BATADV_CMD_TP_METER);
 274         if (!hdr) {
 275                 ret = -ENOBUFS;
 276                 goto err_genlmsg;
 277         }
 278
 279         if (nla_put_u32(msg, BATADV_ATTR_TPMETER_COOKIE, cookie))
 280                 goto nla_put_failure;
 281
 282         if (nla_put_u32(msg, BATADV_ATTR_TPMETER_TEST_TIME, test_time))
 283                 goto nla_put_failure;
 284
 285         if (nla_put_u64_64bit(msg, BATADV_ATTR_TPMETER_BYTES, total_bytes,
 286                               BATADV_ATTR_PAD))
 287                 goto nla_put_failure;
 288
 289         if (nla_put_u8(msg, BATADV_ATTR_TPMETER_RESULT, result))
 290                 goto nla_put_failure;
 291
 292         if (nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN, dst))
 293                 goto nla_put_failure;
 294
 295         genlmsg_end(msg, hdr);
 296
 297         genlmsg_multicast_netns(&batadv_netlink_family,
 298                                 dev_net(bat_priv->soft_iface), msg, 0,
 299                                 BATADV_NL_MCGRP_TPMETER, GFP_KERNEL);
 300
 301         return 0;
 302
 303 nla_put_failure:
 304         genlmsg_cancel(msg, hdr);
 305         ret = -EMSGSIZE;
 306
 307 err_genlmsg:
 308         nlmsg_free(msg);
 309         return ret;
 310 }
 311
 312 /**
 313  * batadv_netlink_tp_meter_start - Start a new tp_meter session
 314  * @skb: received netlink message
 315  * @info: receiver information
 316  *
 317  * Return: 0 on success, < 0 on error
 318  */
 319 static int
 320 batadv_netlink_tp_meter_start(struct sk_buff *skb, struct genl_info *info)
 321 {
 322         struct net *net = genl_info_net(info);
 323         struct net_device *soft_iface;
 324         struct batadv_priv *bat_priv;
 325         struct sk_buff *msg = NULL;
 326         u32 test_length;
 327         void *msg_head;
 328         int ifindex;
 329         u32 cookie;
 330         u8 *dst;
 331         int ret;
 332
 333         if (!info->attrs[BATADV_ATTR_MESH_IFINDEX])
 334                 return -EINVAL;
 335
 336         if (!info->attrs[BATADV_ATTR_ORIG_ADDRESS])
 337                 return -EINVAL;
 338
 339         if (!info->attrs[BATADV_ATTR_TPMETER_TEST_TIME])
 340                 return -EINVAL;
 341
 342         ifindex = nla_get_u32(info->attrs[BATADV_ATTR_MESH_IFINDEX]);
 343         if (!ifindex)
 344                 return -EINVAL;
 345
 346         dst = nla_data(info->attrs[BATADV_ATTR_ORIG_ADDRESS]);
 347
 348         test_length = nla_get_u32(info->attrs[BATADV_ATTR_TPMETER_TEST_TIME]);
 349
 350         soft_iface = dev_get_by_index(net, ifindex);
 351         if (!soft_iface || !batadv_softif_is_valid(soft_iface)) {
 352                 ret = -ENODEV;
 353                 goto out;
 354         }
 355
 356         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 357         if (!msg) {
 358                 ret = -ENOMEM;
 359                 goto out;
 360         }
 361
 362         msg_head = genlmsg_put(msg, info->snd_portid, info->snd_seq,
 363                                &batadv_netlink_family, 0,
 364                                BATADV_CMD_TP_METER);
 365         if (!msg_head) {
 366                 ret = -ENOBUFS;
 367                 goto out;
 368         }
 369
 370         bat_priv = netdev_priv(soft_iface);
 371         batadv_tp_start(bat_priv, dst, test_length, &cookie);
 372
 373         ret = batadv_netlink_tp_meter_put(msg, cookie);
 374
 375  out:
 376         if (soft_iface)
 377                 dev_put(soft_iface);
 378
 379         if (ret) {
 380                 if (msg)
 381                         nlmsg_free(msg);
 382                 return ret;
 383         }
 384
 385         genlmsg_end(msg, msg_head);
 386         return genlmsg_reply(msg, info);
 387 }
 388
 389 /**
 390  * batadv_netlink_tp_meter_start - Cancel a running tp_meter session
 391  * @skb: received netlink message
 392  * @info: receiver information
 393  *
 394  * Return: 0 on success, < 0 on error
 395  */
 396 static int
 397 batadv_netlink_tp_meter_cancel(struct sk_buff *skb, struct genl_info *info)
 398 {
 399         struct net *net = genl_info_net(info);
 400         struct net_device *soft_iface;
 401         struct batadv_priv *bat_priv;
 402         int ifindex;
 403         u8 *dst;
 404         int ret = 0;
 405
 406         if (!info->attrs[BATADV_ATTR_MESH_IFINDEX])
 407                 return -EINVAL;
 408
 409         if (!info->attrs[BATADV_ATTR_ORIG_ADDRESS])
 410                 return -EINVAL;
 411
 412         ifindex = nla_get_u32(info->attrs[BATADV_ATTR_MESH_IFINDEX]);
 413         if (!ifindex)
 414                 return -EINVAL;
 415
 416         dst = nla_data(info->attrs[BATADV_ATTR_ORIG_ADDRESS]);
 417
 418         soft_iface = dev_get_by_index(net, ifindex);
 419         if (!soft_iface || !batadv_softif_is_valid(soft_iface)) {
 420                 ret = -ENODEV;
 421                 goto out;
 422         }
 423
 424         bat_priv = netdev_priv(soft_iface);
 425         batadv_tp_stop(bat_priv, dst, BATADV_TP_REASON_CANCEL);
 426
 427 out:
 428         if (soft_iface)
 429                 dev_put(soft_iface);
 430
 431         return ret;
 432 }
 433
 434 /**
 435  * batadv_netlink_dump_hardif_entry - Dump one hard interface into a message
 436  * @msg: Netlink message to dump into
 437  * @portid: Port making netlink request
 438  * @seq: Sequence number of netlink message
 439  * @hard_iface: Hard interface to dump
 440  *
 441  * Return: error code, or 0 on success
 442  */
 443 static int
 444 batadv_netlink_dump_hardif_entry(struct sk_buff *msg, u32 portid, u32 seq,
 445                                  struct batadv_hard_iface *hard_iface)
 446 {
 447         struct net_device *net_dev = hard_iface->net_dev;
 448         void *hdr;
 449
 450         hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, NLM_F_MULTI,
 451                           BATADV_CMD_GET_HARDIFS);
 452         if (!hdr)
 453                 return -EMSGSIZE;
 454
 455         if (nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX,
 456                         net_dev->ifindex) ||
 457             nla_put_string(msg, BATADV_ATTR_HARD_IFNAME,
 458                            net_dev->name) ||
 459             nla_put(msg, BATADV_ATTR_HARD_ADDRESS, ETH_ALEN,
 460                     net_dev->dev_addr))
 461                 goto nla_put_failure;
 462
 463         if (hard_iface->if_status == BATADV_IF_ACTIVE) {
 464                 if (nla_put_flag(msg, BATADV_ATTR_ACTIVE))
 465                         goto nla_put_failure;
 466         }
 467
 468         genlmsg_end(msg, hdr);
 469         return 0;
 470
 471  nla_put_failure:
 472         genlmsg_cancel(msg, hdr);
 473         return -EMSGSIZE;
 474 }
 475
 476 /**
 477  * batadv_netlink_dump_hardifs - Dump all hard interface into a messages
 478  * @msg: Netlink message to dump into
 479  * @cb: Parameters from query
 480  *
 481  * Return: error code, or length of reply message on success
 482  */
 483 static int
 484 batadv_netlink_dump_hardifs(struct sk_buff *msg, struct netlink_callback *cb)
 485 {
 486         struct net *net = sock_net(cb->skb->sk);
 487         struct net_device *soft_iface;
 488         struct batadv_hard_iface *hard_iface;
 489         int ifindex;
 490         int portid = NETLINK_CB(cb->skb).portid;
 491         int seq = cb->nlh->nlmsg_seq;
 492         int skip = cb->args[0];
 493         int i = 0;
 494
 495         ifindex = batadv_netlink_get_ifindex(cb->nlh,
 496                                              BATADV_ATTR_MESH_IFINDEX);
 497         if (!ifindex)
 498                 return -EINVAL;
 499
 500         soft_iface = dev_get_by_index(net, ifindex);
 501         if (!soft_iface)
 502                 return -ENODEV;
 503
 504         if (!batadv_softif_is_valid(soft_iface)) {
 505                 dev_put(soft_iface);
 506                 return -ENODEV;
 507         }
 508
 509         rcu_read_lock();
 510
 511         list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) {
 512                 if (hard_iface->soft_iface != soft_iface)
 513                         continue;
 514
 515                 if (i++ < skip)
 516                         continue;
 517
 518                 if (batadv_netlink_dump_hardif_entry(msg, portid, seq,
 519                                                      hard_iface)) {
 520                         i--;
 521                         break;
 522                 }
 523         }
 524
 525         rcu_read_unlock();
 526
 527         dev_put(soft_iface);
 528
 529         cb->args[0] = i;
 530
 531         return msg->len;
 532 }
 533
 534 static const struct genl_ops batadv_netlink_ops[] = {
 535         {
 536                 .cmd = BATADV_CMD_GET_MESH_INFO,
 537                 .flags = GENL_ADMIN_PERM,
 538                 .policy = batadv_netlink_policy,
 539                 .doit = batadv_netlink_get_mesh_info,
 540         },
 541         {
 542                 .cmd = BATADV_CMD_TP_METER,
 543                 .flags = GENL_ADMIN_PERM,
 544                 .policy = batadv_netlink_policy,
 545                 .doit = batadv_netlink_tp_meter_start,
 546         },
 547         {
 548                 .cmd = BATADV_CMD_TP_METER_CANCEL,
 549                 .flags = GENL_ADMIN_PERM,
 550                 .policy = batadv_netlink_policy,
 551                 .doit = batadv_netlink_tp_meter_cancel,
 552         },
 553         {
 554                 .cmd = BATADV_CMD_GET_ROUTING_ALGOS,
 555                 .flags = GENL_ADMIN_PERM,
 556                 .policy = batadv_netlink_policy,
 557                 .dumpit = batadv_algo_dump,
 558         },
 559         {
 560                 .cmd = BATADV_CMD_GET_HARDIFS,
 561                 .flags = GENL_ADMIN_PERM,
 562                 .policy = batadv_netlink_policy,
 563                 .dumpit = batadv_netlink_dump_hardifs,
 564         },
 565         {
 566                 .cmd = BATADV_CMD_GET_TRANSTABLE_LOCAL,
 567                 .flags = GENL_ADMIN_PERM,
 568                 .policy = batadv_netlink_policy,
 569                 .dumpit = batadv_tt_local_dump,
 570         },
 571         {
 572                 .cmd = BATADV_CMD_GET_TRANSTABLE_GLOBAL,
 573                 .flags = GENL_ADMIN_PERM,
 574                 .policy = batadv_netlink_policy,
 575                 .dumpit = batadv_tt_global_dump,
 576         },
 577         {
 578                 .cmd = BATADV_CMD_GET_ORIGINATORS,
 579                 .flags = GENL_ADMIN_PERM,
 580                 .policy = batadv_netlink_policy,
 581                 .dumpit = batadv_orig_dump,
 582         },
 583         {
 584                 .cmd = BATADV_CMD_GET_NEIGHBORS,
 585                 .flags = GENL_ADMIN_PERM,
 586                 .policy = batadv_netlink_policy,
 587                 .dumpit = batadv_hardif_neigh_dump,
 588         },
 589         {
 590                 .cmd = BATADV_CMD_GET_GATEWAYS,
 591                 .flags = GENL_ADMIN_PERM,
 592                 .policy = batadv_netlink_policy,
 593                 .dumpit = batadv_gw_dump,
 594         },
 595         {
 596                 .cmd = BATADV_CMD_GET_BLA_CLAIM,
 597                 .flags = GENL_ADMIN_PERM,
 598                 .policy = batadv_netlink_policy,
 599                 .dumpit = batadv_bla_claim_dump,
 600         },
 601         {
 602                 .cmd = BATADV_CMD_GET_BLA_BACKBONE,
 603                 .flags = GENL_ADMIN_PERM,
 604                 .policy = batadv_netlink_policy,
 605                 .dumpit = batadv_bla_backbone_dump,
 606         },
 607
 608 };
 609
 610 struct genl_family batadv_netlink_family __ro_after_init = {
 611         .hdrsize = 0,
 612         .name = BATADV_NL_NAME,
 613         .version = 1,
 614         .maxattr = BATADV_ATTR_MAX,
 615         .netnsok = true,
 616         .module = THIS_MODULE,
 617         .ops = batadv_netlink_ops,
 618         .n_ops = ARRAY_SIZE(batadv_netlink_ops),
 619         .mcgrps = batadv_netlink_mcgrps,
 620         .n_mcgrps = ARRAY_SIZE(batadv_netlink_mcgrps),
 621 };
 622
 623 /**
 624  * batadv_netlink_register - register batadv genl netlink family
 625  */
 626 void __init batadv_netlink_register(void)
 627 {
 628         int ret;
 629
 630         ret = genl_register_family(&batadv_netlink_family);
 631         if (ret)
 632                 pr_warn("unable to register netlink family");
 633 }
 634
 635 /**
 636  * batadv_netlink_unregister - unregister batadv genl netlink family
 637  */
 638 void batadv_netlink_unregister(void)
 639 {
 640         genl_unregister_family(&batadv_netlink_family);
 641 }