net/batman-adv/netlink.c

   1 /* Copyright (C) 2016-2017  B.A.T.M.A.N. contributors:
   2  *
   3  * Matthias Schiffer
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of version 2 of the GNU General Public
   7  * License as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  12  * General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include "netlink.h"
  19 #include "main.h"
  20
  21 #include <linux/atomic.h>
  22 #include <linux/byteorder/generic.h>
  23 #include <linux/cache.h>
  24 #include <linux/errno.h>
  25 #include <linux/export.h>
  26 #include <linux/fs.h>
  27 #include <linux/genetlink.h>
  28 #include <linux/if_ether.h>
  29 #include <linux/init.h>
  30 #include <linux/kernel.h>
  31 #include <linux/netdevice.h>
  32 #include <linux/netlink.h>
  33 #include <linux/printk.h>
  34 #include <linux/rculist.h>
  35 #include <linux/rcupdate.h>
  36 #include <linux/skbuff.h>
  37 #include <linux/stddef.h>
  38 #include <linux/types.h>
  39 #include <net/genetlink.h>
  40 #include <net/netlink.h>
  41 #include <net/sock.h>
  42 #include <uapi/linux/batman_adv.h>
  43
  44 #include "bat_algo.h"
  45 #include "bridge_loop_avoidance.h"
  46 #include "gateway_client.h"
  47 #include "hard-interface.h"
  48 #include "originator.h"
  49 #include "packet.h"
  50 #include "soft-interface.h"
  51 #include "tp_meter.h"
  52 #include "translation-table.h"
  53
  54 struct genl_family batadv_netlink_family;
  55
  56 /* multicast groups */
  57 enum batadv_netlink_multicast_groups {
  58         BATADV_NL_MCGRP_TPMETER,
  59 };
  60
  61 static const struct genl_multicast_group batadv_netlink_mcgrps[] = {
  62         [BATADV_NL_MCGRP_TPMETER] = { .name = BATADV_NL_MCAST_GROUP_TPMETER },
  63 };
  64
  65 static const struct nla_policy batadv_netlink_policy[NUM_BATADV_ATTR] = {
  66         [BATADV_ATTR_VERSION]           = { .type = NLA_STRING },
  67         [BATADV_ATTR_ALGO_NAME]         = { .type = NLA_STRING },
  68         [BATADV_ATTR_MESH_IFINDEX]      = { .type = NLA_U32 },
  69         [BATADV_ATTR_MESH_IFNAME]       = { .type = NLA_STRING },
  70         [BATADV_ATTR_MESH_ADDRESS]      = { .len = ETH_ALEN },
  71         [BATADV_ATTR_HARD_IFINDEX]      = { .type = NLA_U32 },
  72         [BATADV_ATTR_HARD_IFNAME]       = { .type = NLA_STRING },
  73         [BATADV_ATTR_HARD_ADDRESS]      = { .len = ETH_ALEN },
  74         [BATADV_ATTR_ORIG_ADDRESS]      = { .len = ETH_ALEN },
  75         [BATADV_ATTR_TPMETER_RESULT]    = { .type = NLA_U8 },
  76         [BATADV_ATTR_TPMETER_TEST_TIME] = { .type = NLA_U32 },
  77         [BATADV_ATTR_TPMETER_BYTES]     = { .type = NLA_U64 },
  78         [BATADV_ATTR_TPMETER_COOKIE]    = { .type = NLA_U32 },
  79         [BATADV_ATTR_ACTIVE]            = { .type = NLA_FLAG },
  80         [BATADV_ATTR_TT_ADDRESS]        = { .len = ETH_ALEN },
  81         [BATADV_ATTR_TT_TTVN]           = { .type = NLA_U8 },
  82         [BATADV_ATTR_TT_LAST_TTVN]      = { .type = NLA_U8 },
  83         [BATADV_ATTR_TT_CRC32]          = { .type = NLA_U32 },
  84         [BATADV_ATTR_TT_VID]            = { .type = NLA_U16 },
  85         [BATADV_ATTR_TT_FLAGS]          = { .type = NLA_U32 },
  86         [BATADV_ATTR_FLAG_BEST]         = { .type = NLA_FLAG },
  87         [BATADV_ATTR_LAST_SEEN_MSECS]   = { .type = NLA_U32 },
  88         [BATADV_ATTR_NEIGH_ADDRESS]     = { .len = ETH_ALEN },
  89         [BATADV_ATTR_TQ]                = { .type = NLA_U8 },
  90         [BATADV_ATTR_THROUGHPUT]        = { .type = NLA_U32 },
  91         [BATADV_ATTR_BANDWIDTH_UP]      = { .type = NLA_U32 },
  92         [BATADV_ATTR_BANDWIDTH_DOWN]    = { .type = NLA_U32 },
  93         [BATADV_ATTR_ROUTER]            = { .len = ETH_ALEN },
  94         [BATADV_ATTR_BLA_OWN]           = { .type = NLA_FLAG },
  95         [BATADV_ATTR_BLA_ADDRESS]       = { .len = ETH_ALEN },
  96         [BATADV_ATTR_BLA_VID]           = { .type = NLA_U16 },
  97         [BATADV_ATTR_BLA_BACKBONE]      = { .len = ETH_ALEN },
  98         [BATADV_ATTR_BLA_CRC]           = { .type = NLA_U16 },
  99 };
 100
 101 /**
 102  * batadv_netlink_get_ifindex - Extract an interface index from a message
 103  * @nlh: Message header
 104  * @attrtype: Attribute which holds an interface index
 105  *
 106  * Return: interface index, or 0.
 107  */
 108 int
 109 batadv_netlink_get_ifindex(const struct nlmsghdr *nlh, int attrtype)
 110 {
 111         struct nlattr *attr = nlmsg_find_attr(nlh, GENL_HDRLEN, attrtype);
 112
 113         return (attr && nla_len(attr) == sizeof(u32)) ? nla_get_u32(attr) : 0;
 114 }
 115
 116 /**
 117  * batadv_netlink_mesh_info_put - fill in generic information about mesh
 118  *  interface
 119  * @msg: netlink message to be sent back
 120  * @soft_iface: interface for which the data should be taken
 121  *
 122  * Return: 0 on success, < 0 on error
 123  */
 124 static int
 125 batadv_netlink_mesh_info_put(struct sk_buff *msg, struct net_device *soft_iface)
 126 {
 127         struct batadv_priv *bat_priv = netdev_priv(soft_iface);
 128         struct batadv_hard_iface *primary_if = NULL;
 129         struct net_device *hard_iface;
 130         int ret = -ENOBUFS;
 131
 132         if (nla_put_string(msg, BATADV_ATTR_VERSION, BATADV_SOURCE_VERSION) ||
 133             nla_put_string(msg, BATADV_ATTR_ALGO_NAME,
 134                            bat_priv->algo_ops->name) ||
 135             nla_put_u32(msg, BATADV_ATTR_MESH_IFINDEX, soft_iface->ifindex) ||
 136             nla_put_string(msg, BATADV_ATTR_MESH_IFNAME, soft_iface->name) ||
 137             nla_put(msg, BATADV_ATTR_MESH_ADDRESS, ETH_ALEN,
 138                     soft_iface->dev_addr) ||
 139             nla_put_u8(msg, BATADV_ATTR_TT_TTVN,
 140                        (u8)atomic_read(&bat_priv->tt.vn)))
 141                 goto out;
 142
 143 #ifdef CONFIG_BATMAN_ADV_BLA
 144         if (nla_put_u16(msg, BATADV_ATTR_BLA_CRC,
 145                         ntohs(bat_priv->bla.claim_dest.group)))
 146                 goto out;
 147 #endif
 148
 149         primary_if = batadv_primary_if_get_selected(bat_priv);
 150         if (primary_if && primary_if->if_status == BATADV_IF_ACTIVE) {
 151                 hard_iface = primary_if->net_dev;
 152
 153                 if (nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX,
 154                                 hard_iface->ifindex) ||
 155                     nla_put_string(msg, BATADV_ATTR_HARD_IFNAME,
 156                                    hard_iface->name) ||
 157                     nla_put(msg, BATADV_ATTR_HARD_ADDRESS, ETH_ALEN,
 158                             hard_iface->dev_addr))
 159                         goto out;
 160         }
 161
 162         ret = 0;
 163
 164  out:
 165         if (primary_if)
 166                 batadv_hardif_put(primary_if);
 167
 168         return ret;
 169 }
 170
 171 /**
 172  * batadv_netlink_get_mesh_info - handle incoming BATADV_CMD_GET_MESH_INFO
 173  *  netlink request
 174  * @skb: received netlink message
 175  * @info: receiver information
 176  *
 177  * Return: 0 on success, < 0 on error
 178  */
 179 static int
 180 batadv_netlink_get_mesh_info(struct sk_buff *skb, struct genl_info *info)
 181 {
 182         struct net *net = genl_info_net(info);
 183         struct net_device *soft_iface;
 184         struct sk_buff *msg = NULL;
 185         void *msg_head;
 186         int ifindex;
 187         int ret;
 188
 189         if (!info->attrs[BATADV_ATTR_MESH_IFINDEX])
 190                 return -EINVAL;
 191
 192         ifindex = nla_get_u32(info->attrs[BATADV_ATTR_MESH_IFINDEX]);
 193         if (!ifindex)
 194                 return -EINVAL;
 195
 196         soft_iface = dev_get_by_index(net, ifindex);
 197         if (!soft_iface || !batadv_softif_is_valid(soft_iface)) {
 198                 ret = -ENODEV;
 199                 goto out;
 200         }
 201
 202         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 203         if (!msg) {
 204                 ret = -ENOMEM;
 205                 goto out;
 206         }
 207
 208         msg_head = genlmsg_put(msg, info->snd_portid, info->snd_seq,
 209                                &batadv_netlink_family, 0,
 210                                BATADV_CMD_GET_MESH_INFO);
 211         if (!msg_head) {
 212                 ret = -ENOBUFS;
 213                 goto out;
 214         }
 215
 216         ret = batadv_netlink_mesh_info_put(msg, soft_iface);
 217
 218  out:
 219         if (soft_iface)
 220                 dev_put(soft_iface);
 221
 222         if (ret) {
 223                 if (msg)
 224                         nlmsg_free(msg);
 225                 return ret;
 226         }
 227
 228         genlmsg_end(msg, msg_head);
 229         return genlmsg_reply(msg, info);
 230 }
 231
 232 /**
 233  * batadv_netlink_tp_meter_put - Fill information of started tp_meter session
 234  * @msg: netlink message to be sent back
 235  * @cookie: tp meter session cookie
 236  *
 237  *  Return: 0 on success, < 0 on error
 238  */
 239 static int
 240 batadv_netlink_tp_meter_put(struct sk_buff *msg, u32 cookie)
 241 {
 242         if (nla_put_u32(msg, BATADV_ATTR_TPMETER_COOKIE, cookie))
 243                 return -ENOBUFS;
 244
 245         return 0;
 246 }
 247
 248 /**
 249  * batadv_netlink_tpmeter_notify - send tp_meter result via netlink to client
 250  * @bat_priv: the bat priv with all the soft interface information
 251  * @dst: destination of tp_meter session
 252  * @result: reason for tp meter session stop
 253  * @test_time: total time ot the tp_meter session
 254  * @total_bytes: bytes acked to the receiver
 255  * @cookie: cookie of tp_meter session
 256  *
 257  * Return: 0 on success, < 0 on error
 258  */
 259 int batadv_netlink_tpmeter_notify(struct batadv_priv *bat_priv, const u8 *dst,
 260                                   u8 result, u32 test_time, u64 total_bytes,
 261                                   u32 cookie)
 262 {
 263         struct sk_buff *msg;
 264         void *hdr;
 265         int ret;
 266
 267         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 268         if (!msg)
 269                 return -ENOMEM;
 270
 271         hdr = genlmsg_put(msg, 0, 0, &batadv_netlink_family, 0,
 272                           BATADV_CMD_TP_METER);
 273         if (!hdr) {
 274                 ret = -ENOBUFS;
 275                 goto err_genlmsg;
 276         }
 277
 278         if (nla_put_u32(msg, BATADV_ATTR_TPMETER_COOKIE, cookie))
 279                 goto nla_put_failure;
 280
 281         if (nla_put_u32(msg, BATADV_ATTR_TPMETER_TEST_TIME, test_time))
 282                 goto nla_put_failure;
 283
 284         if (nla_put_u64_64bit(msg, BATADV_ATTR_TPMETER_BYTES, total_bytes,
 285                               BATADV_ATTR_PAD))
 286                 goto nla_put_failure;
 287
 288         if (nla_put_u8(msg, BATADV_ATTR_TPMETER_RESULT, result))
 289                 goto nla_put_failure;
 290
 291         if (nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN, dst))
 292                 goto nla_put_failure;
 293
 294         genlmsg_end(msg, hdr);
 295
 296         genlmsg_multicast_netns(&batadv_netlink_family,
 297                                 dev_net(bat_priv->soft_iface), msg, 0,
 298                                 BATADV_NL_MCGRP_TPMETER, GFP_KERNEL);
 299
 300         return 0;
 301
 302 nla_put_failure:
 303         genlmsg_cancel(msg, hdr);
 304         ret = -EMSGSIZE;
 305
 306 err_genlmsg:
 307         nlmsg_free(msg);
 308         return ret;
 309 }
 310
 311 /**
 312  * batadv_netlink_tp_meter_start - Start a new tp_meter session
 313  * @skb: received netlink message
 314  * @info: receiver information
 315  *
 316  * Return: 0 on success, < 0 on error
 317  */
 318 static int
 319 batadv_netlink_tp_meter_start(struct sk_buff *skb, struct genl_info *info)
 320 {
 321         struct net *net = genl_info_net(info);
 322         struct net_device *soft_iface;
 323         struct batadv_priv *bat_priv;
 324         struct sk_buff *msg = NULL;
 325         u32 test_length;
 326         void *msg_head;
 327         int ifindex;
 328         u32 cookie;
 329         u8 *dst;
 330         int ret;
 331
 332         if (!info->attrs[BATADV_ATTR_MESH_IFINDEX])
 333                 return -EINVAL;
 334
 335         if (!info->attrs[BATADV_ATTR_ORIG_ADDRESS])
 336                 return -EINVAL;
 337
 338         if (!info->attrs[BATADV_ATTR_TPMETER_TEST_TIME])
 339                 return -EINVAL;
 340
 341         ifindex = nla_get_u32(info->attrs[BATADV_ATTR_MESH_IFINDEX]);
 342         if (!ifindex)
 343                 return -EINVAL;
 344
 345         dst = nla_data(info->attrs[BATADV_ATTR_ORIG_ADDRESS]);
 346
 347         test_length = nla_get_u32(info->attrs[BATADV_ATTR_TPMETER_TEST_TIME]);
 348
 349         soft_iface = dev_get_by_index(net, ifindex);
 350         if (!soft_iface || !batadv_softif_is_valid(soft_iface)) {
 351                 ret = -ENODEV;
 352                 goto out;
 353         }
 354
 355         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 356         if (!msg) {
 357                 ret = -ENOMEM;
 358                 goto out;
 359         }
 360
 361         msg_head = genlmsg_put(msg, info->snd_portid, info->snd_seq,
 362                                &batadv_netlink_family, 0,
 363                                BATADV_CMD_TP_METER);
 364         if (!msg_head) {
 365                 ret = -ENOBUFS;
 366                 goto out;
 367         }
 368
 369         bat_priv = netdev_priv(soft_iface);
 370         batadv_tp_start(bat_priv, dst, test_length, &cookie);
 371
 372         ret = batadv_netlink_tp_meter_put(msg, cookie);
 373
 374  out:
 375         if (soft_iface)
 376                 dev_put(soft_iface);
 377
 378         if (ret) {
 379                 if (msg)
 380                         nlmsg_free(msg);
 381                 return ret;
 382         }
 383
 384         genlmsg_end(msg, msg_head);
 385         return genlmsg_reply(msg, info);
 386 }
 387
 388 /**
 389  * batadv_netlink_tp_meter_start - Cancel a running tp_meter session
 390  * @skb: received netlink message
 391  * @info: receiver information
 392  *
 393  * Return: 0 on success, < 0 on error
 394  */
 395 static int
 396 batadv_netlink_tp_meter_cancel(struct sk_buff *skb, struct genl_info *info)
 397 {
 398         struct net *net = genl_info_net(info);
 399         struct net_device *soft_iface;
 400         struct batadv_priv *bat_priv;
 401         int ifindex;
 402         u8 *dst;
 403         int ret = 0;
 404
 405         if (!info->attrs[BATADV_ATTR_MESH_IFINDEX])
 406                 return -EINVAL;
 407
 408         if (!info->attrs[BATADV_ATTR_ORIG_ADDRESS])
 409                 return -EINVAL;
 410
 411         ifindex = nla_get_u32(info->attrs[BATADV_ATTR_MESH_IFINDEX]);
 412         if (!ifindex)
 413                 return -EINVAL;
 414
 415         dst = nla_data(info->attrs[BATADV_ATTR_ORIG_ADDRESS]);
 416
 417         soft_iface = dev_get_by_index(net, ifindex);
 418         if (!soft_iface || !batadv_softif_is_valid(soft_iface)) {
 419                 ret = -ENODEV;
 420                 goto out;
 421         }
 422
 423         bat_priv = netdev_priv(soft_iface);
 424         batadv_tp_stop(bat_priv, dst, BATADV_TP_REASON_CANCEL);
 425
 426 out:
 427         if (soft_iface)
 428                 dev_put(soft_iface);
 429
 430         return ret;
 431 }
 432
 433 /**
 434  * batadv_netlink_dump_hardif_entry - Dump one hard interface into a message
 435  * @msg: Netlink message to dump into
 436  * @portid: Port making netlink request
 437  * @seq: Sequence number of netlink message
 438  * @hard_iface: Hard interface to dump
 439  *
 440  * Return: error code, or 0 on success
 441  */
 442 static int
 443 batadv_netlink_dump_hardif_entry(struct sk_buff *msg, u32 portid, u32 seq,
 444                                  struct batadv_hard_iface *hard_iface)
 445 {
 446         struct net_device *net_dev = hard_iface->net_dev;
 447         void *hdr;
 448
 449         hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, NLM_F_MULTI,
 450                           BATADV_CMD_GET_HARDIFS);
 451         if (!hdr)
 452                 return -EMSGSIZE;
 453
 454         if (nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX,
 455                         net_dev->ifindex) ||
 456             nla_put_string(msg, BATADV_ATTR_HARD_IFNAME,
 457                            net_dev->name) ||
 458             nla_put(msg, BATADV_ATTR_HARD_ADDRESS, ETH_ALEN,
 459                     net_dev->dev_addr))
 460                 goto nla_put_failure;
 461
 462         if (hard_iface->if_status == BATADV_IF_ACTIVE) {
 463                 if (nla_put_flag(msg, BATADV_ATTR_ACTIVE))
 464                         goto nla_put_failure;
 465         }
 466
 467         genlmsg_end(msg, hdr);
 468         return 0;
 469
 470  nla_put_failure:
 471         genlmsg_cancel(msg, hdr);
 472         return -EMSGSIZE;
 473 }
 474
 475 /**
 476  * batadv_netlink_dump_hardifs - Dump all hard interface into a messages
 477  * @msg: Netlink message to dump into
 478  * @cb: Parameters from query
 479  *
 480  * Return: error code, or length of reply message on success
 481  */
 482 static int
 483 batadv_netlink_dump_hardifs(struct sk_buff *msg, struct netlink_callback *cb)
 484 {
 485         struct net *net = sock_net(cb->skb->sk);
 486         struct net_device *soft_iface;
 487         struct batadv_hard_iface *hard_iface;
 488         int ifindex;
 489         int portid = NETLINK_CB(cb->skb).portid;
 490         int seq = cb->nlh->nlmsg_seq;
 491         int skip = cb->args[0];
 492         int i = 0;
 493
 494         ifindex = batadv_netlink_get_ifindex(cb->nlh,
 495                                              BATADV_ATTR_MESH_IFINDEX);
 496         if (!ifindex)
 497                 return -EINVAL;
 498
 499         soft_iface = dev_get_by_index(net, ifindex);
 500         if (!soft_iface)
 501                 return -ENODEV;
 502
 503         if (!batadv_softif_is_valid(soft_iface)) {
 504                 dev_put(soft_iface);
 505                 return -ENODEV;
 506         }
 507
 508         rcu_read_lock();
 509
 510         list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) {
 511                 if (hard_iface->soft_iface != soft_iface)
 512                         continue;
 513
 514                 if (i++ < skip)
 515                         continue;
 516
 517                 if (batadv_netlink_dump_hardif_entry(msg, portid, seq,
 518                                                      hard_iface)) {
 519                         i--;
 520                         break;
 521                 }
 522         }
 523
 524         rcu_read_unlock();
 525
 526         dev_put(soft_iface);
 527
 528         cb->args[0] = i;
 529
 530         return msg->len;
 531 }
 532
 533 static const struct genl_ops batadv_netlink_ops[] = {
 534         {
 535                 .cmd = BATADV_CMD_GET_MESH_INFO,
 536                 .flags = GENL_ADMIN_PERM,
 537                 .policy = batadv_netlink_policy,
 538                 .doit = batadv_netlink_get_mesh_info,
 539         },
 540         {
 541                 .cmd = BATADV_CMD_TP_METER,
 542                 .flags = GENL_ADMIN_PERM,
 543                 .policy = batadv_netlink_policy,
 544                 .doit = batadv_netlink_tp_meter_start,
 545         },
 546         {
 547                 .cmd = BATADV_CMD_TP_METER_CANCEL,
 548                 .flags = GENL_ADMIN_PERM,
 549                 .policy = batadv_netlink_policy,
 550                 .doit = batadv_netlink_tp_meter_cancel,
 551         },
 552         {
 553                 .cmd = BATADV_CMD_GET_ROUTING_ALGOS,
 554                 .flags = GENL_ADMIN_PERM,
 555                 .policy = batadv_netlink_policy,
 556                 .dumpit = batadv_algo_dump,
 557         },
 558         {
 559                 .cmd = BATADV_CMD_GET_HARDIFS,
 560                 .flags = GENL_ADMIN_PERM,
 561                 .policy = batadv_netlink_policy,
 562                 .dumpit = batadv_netlink_dump_hardifs,
 563         },
 564         {
 565                 .cmd = BATADV_CMD_GET_TRANSTABLE_LOCAL,
 566                 .flags = GENL_ADMIN_PERM,
 567                 .policy = batadv_netlink_policy,
 568                 .dumpit = batadv_tt_local_dump,
 569         },
 570         {
 571                 .cmd = BATADV_CMD_GET_TRANSTABLE_GLOBAL,
 572                 .flags = GENL_ADMIN_PERM,
 573                 .policy = batadv_netlink_policy,
 574                 .dumpit = batadv_tt_global_dump,
 575         },
 576         {
 577                 .cmd = BATADV_CMD_GET_ORIGINATORS,
 578                 .flags = GENL_ADMIN_PERM,
 579                 .policy = batadv_netlink_policy,
 580                 .dumpit = batadv_orig_dump,
 581         },
 582         {
 583                 .cmd = BATADV_CMD_GET_NEIGHBORS,
 584                 .flags = GENL_ADMIN_PERM,
 585                 .policy = batadv_netlink_policy,
 586                 .dumpit = batadv_hardif_neigh_dump,
 587         },
 588         {
 589                 .cmd = BATADV_CMD_GET_GATEWAYS,
 590                 .flags = GENL_ADMIN_PERM,
 591                 .policy = batadv_netlink_policy,
 592                 .dumpit = batadv_gw_dump,
 593         },
 594         {
 595                 .cmd = BATADV_CMD_GET_BLA_CLAIM,
 596                 .flags = GENL_ADMIN_PERM,
 597                 .policy = batadv_netlink_policy,
 598                 .dumpit = batadv_bla_claim_dump,
 599         },
 600         {
 601                 .cmd = BATADV_CMD_GET_BLA_BACKBONE,
 602                 .flags = GENL_ADMIN_PERM,
 603                 .policy = batadv_netlink_policy,
 604                 .dumpit = batadv_bla_backbone_dump,
 605         },
 606
 607 };
 608
 609 struct genl_family batadv_netlink_family __ro_after_init = {
 610         .hdrsize = 0,
 611         .name = BATADV_NL_NAME,
 612         .version = 1,
 613         .maxattr = BATADV_ATTR_MAX,
 614         .netnsok = true,
 615         .module = THIS_MODULE,
 616         .ops = batadv_netlink_ops,
 617         .n_ops = ARRAY_SIZE(batadv_netlink_ops),
 618         .mcgrps = batadv_netlink_mcgrps,
 619         .n_mcgrps = ARRAY_SIZE(batadv_netlink_mcgrps),
 620 };
 621
 622 /**
 623  * batadv_netlink_register - register batadv genl netlink family
 624  */
 625 void __init batadv_netlink_register(void)
 626 {
 627         int ret;
 628
 629         ret = genl_register_family(&batadv_netlink_family);
 630         if (ret)
 631                 pr_warn("unable to register netlink family");
 632 }
 633
 634 /**
 635  * batadv_netlink_unregister - unregister batadv genl netlink family
 636  */
 637 void batadv_netlink_unregister(void)
 638 {
 639         genl_unregister_family(&batadv_netlink_family);
 640 }