net/batman-adv/netlink.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright (C) B.A.T.M.A.N. contributors:
   3  *
   4  * Matthias Schiffer
   5  */
   6
   7 #include "netlink.h"
   8 #include "main.h"
   9
  10 #include <linux/array_size.h>
  11 #include <linux/atomic.h>
  12 #include <linux/bitops.h>
  13 #include <linux/bug.h>
  14 #include <linux/byteorder/generic.h>
  15 #include <linux/cache.h>
  16 #include <linux/err.h>
  17 #include <linux/errno.h>
  18 #include <linux/genetlink.h>
  19 #include <linux/gfp.h>
  20 #include <linux/if_ether.h>
  21 #include <linux/if_vlan.h>
  22 #include <linux/init.h>
  23 #include <linux/limits.h>
  24 #include <linux/list.h>
  25 #include <linux/minmax.h>
  26 #include <linux/netdevice.h>
  27 #include <linux/netlink.h>
  28 #include <linux/printk.h>
  29 #include <linux/rtnetlink.h>
  30 #include <linux/skbuff.h>
  31 #include <linux/stddef.h>
  32 #include <linux/types.h>
  33 #include <net/genetlink.h>
  34 #include <net/net_namespace.h>
  35 #include <net/netlink.h>
  36 #include <net/sock.h>
  37 #include <uapi/linux/batadv_packet.h>
  38 #include <uapi/linux/batman_adv.h>
  39
  40 #include "bat_algo.h"
  41 #include "bridge_loop_avoidance.h"
  42 #include "distributed-arp-table.h"
  43 #include "gateway_client.h"
  44 #include "gateway_common.h"
  45 #include "hard-interface.h"
  46 #include "log.h"
  47 #include "multicast.h"
  48 #include "network-coding.h"
  49 #include "originator.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_CONFIG,
  59         BATADV_NL_MCGRP_TPMETER,
  60 };
  61
  62 /**
  63  * enum batadv_genl_ops_flags - flags for genl_ops's internal_flags
  64  */
  65 enum batadv_genl_ops_flags {
  66         /**
  67          * @BATADV_FLAG_NEED_MESH: request requires valid soft interface in
  68          *  attribute BATADV_ATTR_MESH_IFINDEX and expects a pointer to it to be
  69          *  saved in info->user_ptr[0]
  70          */
  71         BATADV_FLAG_NEED_MESH = BIT(0),
  72
  73         /**
  74          * @BATADV_FLAG_NEED_HARDIF: request requires valid hard interface in
  75          *  attribute BATADV_ATTR_HARD_IFINDEX and expects a pointer to it to be
  76          *  saved in info->user_ptr[1]
  77          */
  78         BATADV_FLAG_NEED_HARDIF = BIT(1),
  79
  80         /**
  81          * @BATADV_FLAG_NEED_VLAN: request requires valid vlan in
  82          *  attribute BATADV_ATTR_VLANID and expects a pointer to it to be
  83          *  saved in info->user_ptr[1]
  84          */
  85         BATADV_FLAG_NEED_VLAN = BIT(2),
  86 };
  87
  88 static const struct genl_multicast_group batadv_netlink_mcgrps[] = {
  89         [BATADV_NL_MCGRP_CONFIG] = { .name = BATADV_NL_MCAST_GROUP_CONFIG },
  90         [BATADV_NL_MCGRP_TPMETER] = { .name = BATADV_NL_MCAST_GROUP_TPMETER },
  91 };
  92
  93 static const struct nla_policy batadv_netlink_policy[NUM_BATADV_ATTR] = {
  94         [BATADV_ATTR_VERSION]                   = { .type = NLA_STRING },
  95         [BATADV_ATTR_ALGO_NAME]                 = { .type = NLA_STRING },
  96         [BATADV_ATTR_MESH_IFINDEX]              = { .type = NLA_U32 },
  97         [BATADV_ATTR_MESH_IFNAME]               = { .type = NLA_STRING },
  98         [BATADV_ATTR_MESH_ADDRESS]              = { .len = ETH_ALEN },
  99         [BATADV_ATTR_HARD_IFINDEX]              = { .type = NLA_U32 },
 100         [BATADV_ATTR_HARD_IFNAME]               = { .type = NLA_STRING },
 101         [BATADV_ATTR_HARD_ADDRESS]              = { .len = ETH_ALEN },
 102         [BATADV_ATTR_ORIG_ADDRESS]              = { .len = ETH_ALEN },
 103         [BATADV_ATTR_TPMETER_RESULT]            = { .type = NLA_U8 },
 104         [BATADV_ATTR_TPMETER_TEST_TIME]         = { .type = NLA_U32 },
 105         [BATADV_ATTR_TPMETER_BYTES]             = { .type = NLA_U64 },
 106         [BATADV_ATTR_TPMETER_COOKIE]            = { .type = NLA_U32 },
 107         [BATADV_ATTR_ACTIVE]                    = { .type = NLA_FLAG },
 108         [BATADV_ATTR_TT_ADDRESS]                = { .len = ETH_ALEN },
 109         [BATADV_ATTR_TT_TTVN]                   = { .type = NLA_U8 },
 110         [BATADV_ATTR_TT_LAST_TTVN]              = { .type = NLA_U8 },
 111         [BATADV_ATTR_TT_CRC32]                  = { .type = NLA_U32 },
 112         [BATADV_ATTR_TT_VID]                    = { .type = NLA_U16 },
 113         [BATADV_ATTR_TT_FLAGS]                  = { .type = NLA_U32 },
 114         [BATADV_ATTR_FLAG_BEST]                 = { .type = NLA_FLAG },
 115         [BATADV_ATTR_LAST_SEEN_MSECS]           = { .type = NLA_U32 },
 116         [BATADV_ATTR_NEIGH_ADDRESS]             = { .len = ETH_ALEN },
 117         [BATADV_ATTR_TQ]                        = { .type = NLA_U8 },
 118         [BATADV_ATTR_THROUGHPUT]                = { .type = NLA_U32 },
 119         [BATADV_ATTR_BANDWIDTH_UP]              = { .type = NLA_U32 },
 120         [BATADV_ATTR_BANDWIDTH_DOWN]            = { .type = NLA_U32 },
 121         [BATADV_ATTR_ROUTER]                    = { .len = ETH_ALEN },
 122         [BATADV_ATTR_BLA_OWN]                   = { .type = NLA_FLAG },
 123         [BATADV_ATTR_BLA_ADDRESS]               = { .len = ETH_ALEN },
 124         [BATADV_ATTR_BLA_VID]                   = { .type = NLA_U16 },
 125         [BATADV_ATTR_BLA_BACKBONE]              = { .len = ETH_ALEN },
 126         [BATADV_ATTR_BLA_CRC]                   = { .type = NLA_U16 },
 127         [BATADV_ATTR_DAT_CACHE_IP4ADDRESS]      = { .type = NLA_U32 },
 128         [BATADV_ATTR_DAT_CACHE_HWADDRESS]       = { .len = ETH_ALEN },
 129         [BATADV_ATTR_DAT_CACHE_VID]             = { .type = NLA_U16 },
 130         [BATADV_ATTR_MCAST_FLAGS]               = { .type = NLA_U32 },
 131         [BATADV_ATTR_MCAST_FLAGS_PRIV]          = { .type = NLA_U32 },
 132         [BATADV_ATTR_VLANID]                    = { .type = NLA_U16 },
 133         [BATADV_ATTR_AGGREGATED_OGMS_ENABLED]   = { .type = NLA_U8 },
 134         [BATADV_ATTR_AP_ISOLATION_ENABLED]      = { .type = NLA_U8 },
 135         [BATADV_ATTR_ISOLATION_MARK]            = { .type = NLA_U32 },
 136         [BATADV_ATTR_ISOLATION_MASK]            = { .type = NLA_U32 },
 137         [BATADV_ATTR_BONDING_ENABLED]           = { .type = NLA_U8 },
 138         [BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED]     = { .type = NLA_U8 },
 139         [BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED]     = { .type = NLA_U8 },
 140         [BATADV_ATTR_FRAGMENTATION_ENABLED]     = { .type = NLA_U8 },
 141         [BATADV_ATTR_GW_BANDWIDTH_DOWN]         = { .type = NLA_U32 },
 142         [BATADV_ATTR_GW_BANDWIDTH_UP]           = { .type = NLA_U32 },
 143         [BATADV_ATTR_GW_MODE]                   = { .type = NLA_U8 },
 144         [BATADV_ATTR_GW_SEL_CLASS]              = { .type = NLA_U32 },
 145         [BATADV_ATTR_HOP_PENALTY]               = { .type = NLA_U8 },
 146         [BATADV_ATTR_LOG_LEVEL]                 = { .type = NLA_U32 },
 147         [BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED]      = { .type = NLA_U8 },
 148         [BATADV_ATTR_MULTICAST_FANOUT]          = { .type = NLA_U32 },
 149         [BATADV_ATTR_NETWORK_CODING_ENABLED]    = { .type = NLA_U8 },
 150         [BATADV_ATTR_ORIG_INTERVAL]             = { .type = NLA_U32 },
 151         [BATADV_ATTR_ELP_INTERVAL]              = { .type = NLA_U32 },
 152         [BATADV_ATTR_THROUGHPUT_OVERRIDE]       = { .type = NLA_U32 },
 153 };
 154
 155 /**
 156  * batadv_netlink_get_ifindex() - Extract an interface index from a message
 157  * @nlh: Message header
 158  * @attrtype: Attribute which holds an interface index
 159  *
 160  * Return: interface index, or 0.
 161  */
 162 int
 163 batadv_netlink_get_ifindex(const struct nlmsghdr *nlh, int attrtype)
 164 {
 165         struct nlattr *attr = nlmsg_find_attr(nlh, GENL_HDRLEN, attrtype);
 166
 167         return (attr && nla_len(attr) == sizeof(u32)) ? nla_get_u32(attr) : 0;
 168 }
 169
 170 /**
 171  * batadv_netlink_mesh_fill_ap_isolation() - Add ap_isolation softif attribute
 172  * @msg: Netlink message to dump into
 173  * @bat_priv: the bat priv with all the soft interface information
 174  *
 175  * Return: 0 on success or negative error number in case of failure
 176  */
 177 static int batadv_netlink_mesh_fill_ap_isolation(struct sk_buff *msg,
 178                                                  struct batadv_priv *bat_priv)
 179 {
 180         struct batadv_softif_vlan *vlan;
 181         u8 ap_isolation;
 182
 183         vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS);
 184         if (!vlan)
 185                 return 0;
 186
 187         ap_isolation = atomic_read(&vlan->ap_isolation);
 188         batadv_softif_vlan_put(vlan);
 189
 190         return nla_put_u8(msg, BATADV_ATTR_AP_ISOLATION_ENABLED,
 191                           !!ap_isolation);
 192 }
 193
 194 /**
 195  * batadv_netlink_set_mesh_ap_isolation() - Set ap_isolation from genl msg
 196  * @attr: parsed BATADV_ATTR_AP_ISOLATION_ENABLED attribute
 197  * @bat_priv: the bat priv with all the soft interface information
 198  *
 199  * Return: 0 on success or negative error number in case of failure
 200  */
 201 static int batadv_netlink_set_mesh_ap_isolation(struct nlattr *attr,
 202                                                 struct batadv_priv *bat_priv)
 203 {
 204         struct batadv_softif_vlan *vlan;
 205
 206         vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS);
 207         if (!vlan)
 208                 return -ENOENT;
 209
 210         atomic_set(&vlan->ap_isolation, !!nla_get_u8(attr));
 211         batadv_softif_vlan_put(vlan);
 212
 213         return 0;
 214 }
 215
 216 /**
 217  * batadv_netlink_mesh_fill() - Fill message with mesh attributes
 218  * @msg: Netlink message to dump into
 219  * @bat_priv: the bat priv with all the soft interface information
 220  * @cmd: type of message to generate
 221  * @portid: Port making netlink request
 222  * @seq: sequence number for message
 223  * @flags: Additional flags for message
 224  *
 225  * Return: 0 on success or negative error number in case of failure
 226  */
 227 static int batadv_netlink_mesh_fill(struct sk_buff *msg,
 228                                     struct batadv_priv *bat_priv,
 229                                     enum batadv_nl_commands cmd,
 230                                     u32 portid, u32 seq, int flags)
 231 {
 232         struct net_device *soft_iface = bat_priv->soft_iface;
 233         struct batadv_hard_iface *primary_if = NULL;
 234         struct net_device *hard_iface;
 235         void *hdr;
 236
 237         hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, flags, cmd);
 238         if (!hdr)
 239                 return -ENOBUFS;
 240
 241         if (nla_put_string(msg, BATADV_ATTR_VERSION, BATADV_SOURCE_VERSION) ||
 242             nla_put_string(msg, BATADV_ATTR_ALGO_NAME,
 243                            bat_priv->algo_ops->name) ||
 244             nla_put_u32(msg, BATADV_ATTR_MESH_IFINDEX, soft_iface->ifindex) ||
 245             nla_put_string(msg, BATADV_ATTR_MESH_IFNAME, soft_iface->name) ||
 246             nla_put(msg, BATADV_ATTR_MESH_ADDRESS, ETH_ALEN,
 247                     soft_iface->dev_addr) ||
 248             nla_put_u8(msg, BATADV_ATTR_TT_TTVN,
 249                        (u8)atomic_read(&bat_priv->tt.vn)))
 250                 goto nla_put_failure;
 251
 252 #ifdef CONFIG_BATMAN_ADV_BLA
 253         if (nla_put_u16(msg, BATADV_ATTR_BLA_CRC,
 254                         ntohs(bat_priv->bla.claim_dest.group)))
 255                 goto nla_put_failure;
 256 #endif
 257
 258         if (batadv_mcast_mesh_info_put(msg, bat_priv))
 259                 goto nla_put_failure;
 260
 261         primary_if = batadv_primary_if_get_selected(bat_priv);
 262         if (primary_if && primary_if->if_status == BATADV_IF_ACTIVE) {
 263                 hard_iface = primary_if->net_dev;
 264
 265                 if (nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX,
 266                                 hard_iface->ifindex) ||
 267                     nla_put_string(msg, BATADV_ATTR_HARD_IFNAME,
 268                                    hard_iface->name) ||
 269                     nla_put(msg, BATADV_ATTR_HARD_ADDRESS, ETH_ALEN,
 270                             hard_iface->dev_addr))
 271                         goto nla_put_failure;
 272         }
 273
 274         if (nla_put_u8(msg, BATADV_ATTR_AGGREGATED_OGMS_ENABLED,
 275                        !!atomic_read(&bat_priv->aggregated_ogms)))
 276                 goto nla_put_failure;
 277
 278         if (batadv_netlink_mesh_fill_ap_isolation(msg, bat_priv))
 279                 goto nla_put_failure;
 280
 281         if (nla_put_u32(msg, BATADV_ATTR_ISOLATION_MARK,
 282                         bat_priv->isolation_mark))
 283                 goto nla_put_failure;
 284
 285         if (nla_put_u32(msg, BATADV_ATTR_ISOLATION_MASK,
 286                         bat_priv->isolation_mark_mask))
 287                 goto nla_put_failure;
 288
 289         if (nla_put_u8(msg, BATADV_ATTR_BONDING_ENABLED,
 290                        !!atomic_read(&bat_priv->bonding)))
 291                 goto nla_put_failure;
 292
 293 #ifdef CONFIG_BATMAN_ADV_BLA
 294         if (nla_put_u8(msg, BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED,
 295                        !!atomic_read(&bat_priv->bridge_loop_avoidance)))
 296                 goto nla_put_failure;
 297 #endif /* CONFIG_BATMAN_ADV_BLA */
 298
 299 #ifdef CONFIG_BATMAN_ADV_DAT
 300         if (nla_put_u8(msg, BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED,
 301                        !!atomic_read(&bat_priv->distributed_arp_table)))
 302                 goto nla_put_failure;
 303 #endif /* CONFIG_BATMAN_ADV_DAT */
 304
 305         if (nla_put_u8(msg, BATADV_ATTR_FRAGMENTATION_ENABLED,
 306                        !!atomic_read(&bat_priv->fragmentation)))
 307                 goto nla_put_failure;
 308
 309         if (nla_put_u32(msg, BATADV_ATTR_GW_BANDWIDTH_DOWN,
 310                         atomic_read(&bat_priv->gw.bandwidth_down)))
 311                 goto nla_put_failure;
 312
 313         if (nla_put_u32(msg, BATADV_ATTR_GW_BANDWIDTH_UP,
 314                         atomic_read(&bat_priv->gw.bandwidth_up)))
 315                 goto nla_put_failure;
 316
 317         if (nla_put_u8(msg, BATADV_ATTR_GW_MODE,
 318                        atomic_read(&bat_priv->gw.mode)))
 319                 goto nla_put_failure;
 320
 321         if (bat_priv->algo_ops->gw.get_best_gw_node &&
 322             bat_priv->algo_ops->gw.is_eligible) {
 323                 /* GW selection class is not available if the routing algorithm
 324                  * in use does not implement the GW API
 325                  */
 326                 if (nla_put_u32(msg, BATADV_ATTR_GW_SEL_CLASS,
 327                                 atomic_read(&bat_priv->gw.sel_class)))
 328                         goto nla_put_failure;
 329         }
 330
 331         if (nla_put_u8(msg, BATADV_ATTR_HOP_PENALTY,
 332                        atomic_read(&bat_priv->hop_penalty)))
 333                 goto nla_put_failure;
 334
 335 #ifdef CONFIG_BATMAN_ADV_DEBUG
 336         if (nla_put_u32(msg, BATADV_ATTR_LOG_LEVEL,
 337                         atomic_read(&bat_priv->log_level)))
 338                 goto nla_put_failure;
 339 #endif /* CONFIG_BATMAN_ADV_DEBUG */
 340
 341 #ifdef CONFIG_BATMAN_ADV_MCAST
 342         if (nla_put_u8(msg, BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED,
 343                        !atomic_read(&bat_priv->multicast_mode)))
 344                 goto nla_put_failure;
 345
 346         if (nla_put_u32(msg, BATADV_ATTR_MULTICAST_FANOUT,
 347                         atomic_read(&bat_priv->multicast_fanout)))
 348                 goto nla_put_failure;
 349 #endif /* CONFIG_BATMAN_ADV_MCAST */
 350
 351 #ifdef CONFIG_BATMAN_ADV_NC
 352         if (nla_put_u8(msg, BATADV_ATTR_NETWORK_CODING_ENABLED,
 353                        !!atomic_read(&bat_priv->network_coding)))
 354                 goto nla_put_failure;
 355 #endif /* CONFIG_BATMAN_ADV_NC */
 356
 357         if (nla_put_u32(msg, BATADV_ATTR_ORIG_INTERVAL,
 358                         atomic_read(&bat_priv->orig_interval)))
 359                 goto nla_put_failure;
 360
 361         batadv_hardif_put(primary_if);
 362
 363         genlmsg_end(msg, hdr);
 364         return 0;
 365
 366 nla_put_failure:
 367         batadv_hardif_put(primary_if);
 368
 369         genlmsg_cancel(msg, hdr);
 370         return -EMSGSIZE;
 371 }
 372
 373 /**
 374  * batadv_netlink_notify_mesh() - send softif attributes to listener
 375  * @bat_priv: the bat priv with all the soft interface information
 376  *
 377  * Return: 0 on success, < 0 on error
 378  */
 379 static int batadv_netlink_notify_mesh(struct batadv_priv *bat_priv)
 380 {
 381         struct sk_buff *msg;
 382         int ret;
 383
 384         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 385         if (!msg)
 386                 return -ENOMEM;
 387
 388         ret = batadv_netlink_mesh_fill(msg, bat_priv, BATADV_CMD_SET_MESH,
 389                                        0, 0, 0);
 390         if (ret < 0) {
 391                 nlmsg_free(msg);
 392                 return ret;
 393         }
 394
 395         genlmsg_multicast_netns(&batadv_netlink_family,
 396                                 dev_net(bat_priv->soft_iface), msg, 0,
 397                                 BATADV_NL_MCGRP_CONFIG, GFP_KERNEL);
 398
 399         return 0;
 400 }
 401
 402 /**
 403  * batadv_netlink_get_mesh() - Get softif attributes
 404  * @skb: Netlink message with request data
 405  * @info: receiver information
 406  *
 407  * Return: 0 on success or negative error number in case of failure
 408  */
 409 static int batadv_netlink_get_mesh(struct sk_buff *skb, struct genl_info *info)
 410 {
 411         struct batadv_priv *bat_priv = info->user_ptr[0];
 412         struct sk_buff *msg;
 413         int ret;
 414
 415         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 416         if (!msg)
 417                 return -ENOMEM;
 418
 419         ret = batadv_netlink_mesh_fill(msg, bat_priv, BATADV_CMD_GET_MESH,
 420                                        info->snd_portid, info->snd_seq, 0);
 421         if (ret < 0) {
 422                 nlmsg_free(msg);
 423                 return ret;
 424         }
 425
 426         ret = genlmsg_reply(msg, info);
 427
 428         return ret;
 429 }
 430
 431 /**
 432  * batadv_netlink_set_mesh() - Set softif attributes
 433  * @skb: Netlink message with request data
 434  * @info: receiver information
 435  *
 436  * Return: 0 on success or negative error number in case of failure
 437  */
 438 static int batadv_netlink_set_mesh(struct sk_buff *skb, struct genl_info *info)
 439 {
 440         struct batadv_priv *bat_priv = info->user_ptr[0];
 441         struct nlattr *attr;
 442
 443         if (info->attrs[BATADV_ATTR_AGGREGATED_OGMS_ENABLED]) {
 444                 attr = info->attrs[BATADV_ATTR_AGGREGATED_OGMS_ENABLED];
 445
 446                 atomic_set(&bat_priv->aggregated_ogms, !!nla_get_u8(attr));
 447         }
 448
 449         if (info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED]) {
 450                 attr = info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED];
 451
 452                 batadv_netlink_set_mesh_ap_isolation(attr, bat_priv);
 453         }
 454
 455         if (info->attrs[BATADV_ATTR_ISOLATION_MARK]) {
 456                 attr = info->attrs[BATADV_ATTR_ISOLATION_MARK];
 457
 458                 bat_priv->isolation_mark = nla_get_u32(attr);
 459         }
 460
 461         if (info->attrs[BATADV_ATTR_ISOLATION_MASK]) {
 462                 attr = info->attrs[BATADV_ATTR_ISOLATION_MASK];
 463
 464                 bat_priv->isolation_mark_mask = nla_get_u32(attr);
 465         }
 466
 467         if (info->attrs[BATADV_ATTR_BONDING_ENABLED]) {
 468                 attr = info->attrs[BATADV_ATTR_BONDING_ENABLED];
 469
 470                 atomic_set(&bat_priv->bonding, !!nla_get_u8(attr));
 471         }
 472
 473 #ifdef CONFIG_BATMAN_ADV_BLA
 474         if (info->attrs[BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED]) {
 475                 attr = info->attrs[BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED];
 476
 477                 atomic_set(&bat_priv->bridge_loop_avoidance,
 478                            !!nla_get_u8(attr));
 479                 batadv_bla_status_update(bat_priv->soft_iface);
 480         }
 481 #endif /* CONFIG_BATMAN_ADV_BLA */
 482
 483 #ifdef CONFIG_BATMAN_ADV_DAT
 484         if (info->attrs[BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED]) {
 485                 attr = info->attrs[BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED];
 486
 487                 atomic_set(&bat_priv->distributed_arp_table,
 488                            !!nla_get_u8(attr));
 489                 batadv_dat_status_update(bat_priv->soft_iface);
 490         }
 491 #endif /* CONFIG_BATMAN_ADV_DAT */
 492
 493         if (info->attrs[BATADV_ATTR_FRAGMENTATION_ENABLED]) {
 494                 attr = info->attrs[BATADV_ATTR_FRAGMENTATION_ENABLED];
 495
 496                 atomic_set(&bat_priv->fragmentation, !!nla_get_u8(attr));
 497
 498                 rtnl_lock();
 499                 batadv_update_min_mtu(bat_priv->soft_iface);
 500                 rtnl_unlock();
 501         }
 502
 503         if (info->attrs[BATADV_ATTR_GW_BANDWIDTH_DOWN]) {
 504                 attr = info->attrs[BATADV_ATTR_GW_BANDWIDTH_DOWN];
 505
 506                 atomic_set(&bat_priv->gw.bandwidth_down, nla_get_u32(attr));
 507                 batadv_gw_tvlv_container_update(bat_priv);
 508         }
 509
 510         if (info->attrs[BATADV_ATTR_GW_BANDWIDTH_UP]) {
 511                 attr = info->attrs[BATADV_ATTR_GW_BANDWIDTH_UP];
 512
 513                 atomic_set(&bat_priv->gw.bandwidth_up, nla_get_u32(attr));
 514                 batadv_gw_tvlv_container_update(bat_priv);
 515         }
 516
 517         if (info->attrs[BATADV_ATTR_GW_MODE]) {
 518                 u8 gw_mode;
 519
 520                 attr = info->attrs[BATADV_ATTR_GW_MODE];
 521                 gw_mode = nla_get_u8(attr);
 522
 523                 if (gw_mode <= BATADV_GW_MODE_SERVER) {
 524                         /* Invoking batadv_gw_reselect() is not enough to really
 525                          * de-select the current GW. It will only instruct the
 526                          * gateway client code to perform a re-election the next
 527                          * time that this is needed.
 528                          *
 529                          * When gw client mode is being switched off the current
 530                          * GW must be de-selected explicitly otherwise no GW_ADD
 531                          * uevent is thrown on client mode re-activation. This
 532                          * is operation is performed in
 533                          * batadv_gw_check_client_stop().
 534                          */
 535                         batadv_gw_reselect(bat_priv);
 536
 537                         /* always call batadv_gw_check_client_stop() before
 538                          * changing the gateway state
 539                          */
 540                         batadv_gw_check_client_stop(bat_priv);
 541                         atomic_set(&bat_priv->gw.mode, gw_mode);
 542                         batadv_gw_tvlv_container_update(bat_priv);
 543                 }
 544         }
 545
 546         if (info->attrs[BATADV_ATTR_GW_SEL_CLASS] &&
 547             bat_priv->algo_ops->gw.get_best_gw_node &&
 548             bat_priv->algo_ops->gw.is_eligible) {
 549                 /* setting the GW selection class is allowed only if the routing
 550                  * algorithm in use implements the GW API
 551                  */
 552
 553                 u32 sel_class_max = bat_priv->algo_ops->gw.sel_class_max;
 554                 u32 sel_class;
 555
 556                 attr = info->attrs[BATADV_ATTR_GW_SEL_CLASS];
 557                 sel_class = nla_get_u32(attr);
 558
 559                 if (sel_class >= 1 && sel_class <= sel_class_max) {
 560                         atomic_set(&bat_priv->gw.sel_class, sel_class);
 561                         batadv_gw_reselect(bat_priv);
 562                 }
 563         }
 564
 565         if (info->attrs[BATADV_ATTR_HOP_PENALTY]) {
 566                 attr = info->attrs[BATADV_ATTR_HOP_PENALTY];
 567
 568                 atomic_set(&bat_priv->hop_penalty, nla_get_u8(attr));
 569         }
 570
 571 #ifdef CONFIG_BATMAN_ADV_DEBUG
 572         if (info->attrs[BATADV_ATTR_LOG_LEVEL]) {
 573                 attr = info->attrs[BATADV_ATTR_LOG_LEVEL];
 574
 575                 atomic_set(&bat_priv->log_level,
 576                            nla_get_u32(attr) & BATADV_DBG_ALL);
 577         }
 578 #endif /* CONFIG_BATMAN_ADV_DEBUG */
 579
 580 #ifdef CONFIG_BATMAN_ADV_MCAST
 581         if (info->attrs[BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED]) {
 582                 attr = info->attrs[BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED];
 583
 584                 atomic_set(&bat_priv->multicast_mode, !nla_get_u8(attr));
 585         }
 586
 587         if (info->attrs[BATADV_ATTR_MULTICAST_FANOUT]) {
 588                 attr = info->attrs[BATADV_ATTR_MULTICAST_FANOUT];
 589
 590                 atomic_set(&bat_priv->multicast_fanout, nla_get_u32(attr));
 591         }
 592 #endif /* CONFIG_BATMAN_ADV_MCAST */
 593
 594 #ifdef CONFIG_BATMAN_ADV_NC
 595         if (info->attrs[BATADV_ATTR_NETWORK_CODING_ENABLED]) {
 596                 attr = info->attrs[BATADV_ATTR_NETWORK_CODING_ENABLED];
 597
 598                 atomic_set(&bat_priv->network_coding, !!nla_get_u8(attr));
 599                 batadv_nc_status_update(bat_priv->soft_iface);
 600         }
 601 #endif /* CONFIG_BATMAN_ADV_NC */
 602
 603         if (info->attrs[BATADV_ATTR_ORIG_INTERVAL]) {
 604                 u32 orig_interval;
 605
 606                 attr = info->attrs[BATADV_ATTR_ORIG_INTERVAL];
 607                 orig_interval = nla_get_u32(attr);
 608
 609                 orig_interval = min_t(u32, orig_interval, INT_MAX);
 610                 orig_interval = max_t(u32, orig_interval, 2 * BATADV_JITTER);
 611
 612                 atomic_set(&bat_priv->orig_interval, orig_interval);
 613         }
 614
 615         batadv_netlink_notify_mesh(bat_priv);
 616
 617         return 0;
 618 }
 619
 620 /**
 621  * batadv_netlink_tp_meter_put() - Fill information of started tp_meter session
 622  * @msg: netlink message to be sent back
 623  * @cookie: tp meter session cookie
 624  *
 625  *  Return: 0 on success, < 0 on error
 626  */
 627 static int
 628 batadv_netlink_tp_meter_put(struct sk_buff *msg, u32 cookie)
 629 {
 630         if (nla_put_u32(msg, BATADV_ATTR_TPMETER_COOKIE, cookie))
 631                 return -ENOBUFS;
 632
 633         return 0;
 634 }
 635
 636 /**
 637  * batadv_netlink_tpmeter_notify() - send tp_meter result via netlink to client
 638  * @bat_priv: the bat priv with all the soft interface information
 639  * @dst: destination of tp_meter session
 640  * @result: reason for tp meter session stop
 641  * @test_time: total time of the tp_meter session
 642  * @total_bytes: bytes acked to the receiver
 643  * @cookie: cookie of tp_meter session
 644  *
 645  * Return: 0 on success, < 0 on error
 646  */
 647 int batadv_netlink_tpmeter_notify(struct batadv_priv *bat_priv, const u8 *dst,
 648                                   u8 result, u32 test_time, u64 total_bytes,
 649                                   u32 cookie)
 650 {
 651         struct sk_buff *msg;
 652         void *hdr;
 653         int ret;
 654
 655         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 656         if (!msg)
 657                 return -ENOMEM;
 658
 659         hdr = genlmsg_put(msg, 0, 0, &batadv_netlink_family, 0,
 660                           BATADV_CMD_TP_METER);
 661         if (!hdr) {
 662                 ret = -ENOBUFS;
 663                 goto err_genlmsg;
 664         }
 665
 666         if (nla_put_u32(msg, BATADV_ATTR_TPMETER_COOKIE, cookie))
 667                 goto nla_put_failure;
 668
 669         if (nla_put_u32(msg, BATADV_ATTR_TPMETER_TEST_TIME, test_time))
 670                 goto nla_put_failure;
 671
 672         if (nla_put_u64_64bit(msg, BATADV_ATTR_TPMETER_BYTES, total_bytes,
 673                               BATADV_ATTR_PAD))
 674                 goto nla_put_failure;
 675
 676         if (nla_put_u8(msg, BATADV_ATTR_TPMETER_RESULT, result))
 677                 goto nla_put_failure;
 678
 679         if (nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN, dst))
 680                 goto nla_put_failure;
 681
 682         genlmsg_end(msg, hdr);
 683
 684         genlmsg_multicast_netns(&batadv_netlink_family,
 685                                 dev_net(bat_priv->soft_iface), msg, 0,
 686                                 BATADV_NL_MCGRP_TPMETER, GFP_KERNEL);
 687
 688         return 0;
 689
 690 nla_put_failure:
 691         genlmsg_cancel(msg, hdr);
 692         ret = -EMSGSIZE;
 693
 694 err_genlmsg:
 695         nlmsg_free(msg);
 696         return ret;
 697 }
 698
 699 /**
 700  * batadv_netlink_tp_meter_start() - Start a new tp_meter session
 701  * @skb: received netlink message
 702  * @info: receiver information
 703  *
 704  * Return: 0 on success, < 0 on error
 705  */
 706 static int
 707 batadv_netlink_tp_meter_start(struct sk_buff *skb, struct genl_info *info)
 708 {
 709         struct batadv_priv *bat_priv = info->user_ptr[0];
 710         struct sk_buff *msg = NULL;
 711         u32 test_length;
 712         void *msg_head;
 713         u32 cookie;
 714         u8 *dst;
 715         int ret;
 716
 717         if (!info->attrs[BATADV_ATTR_ORIG_ADDRESS])
 718                 return -EINVAL;
 719
 720         if (!info->attrs[BATADV_ATTR_TPMETER_TEST_TIME])
 721                 return -EINVAL;
 722
 723         dst = nla_data(info->attrs[BATADV_ATTR_ORIG_ADDRESS]);
 724
 725         test_length = nla_get_u32(info->attrs[BATADV_ATTR_TPMETER_TEST_TIME]);
 726
 727         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 728         if (!msg) {
 729                 ret = -ENOMEM;
 730                 goto out;
 731         }
 732
 733         msg_head = genlmsg_put(msg, info->snd_portid, info->snd_seq,
 734                                &batadv_netlink_family, 0,
 735                                BATADV_CMD_TP_METER);
 736         if (!msg_head) {
 737                 ret = -ENOBUFS;
 738                 goto out;
 739         }
 740
 741         batadv_tp_start(bat_priv, dst, test_length, &cookie);
 742
 743         ret = batadv_netlink_tp_meter_put(msg, cookie);
 744
 745  out:
 746         if (ret) {
 747                 if (msg)
 748                         nlmsg_free(msg);
 749                 return ret;
 750         }
 751
 752         genlmsg_end(msg, msg_head);
 753         return genlmsg_reply(msg, info);
 754 }
 755
 756 /**
 757  * batadv_netlink_tp_meter_cancel() - Cancel a running tp_meter session
 758  * @skb: received netlink message
 759  * @info: receiver information
 760  *
 761  * Return: 0 on success, < 0 on error
 762  */
 763 static int
 764 batadv_netlink_tp_meter_cancel(struct sk_buff *skb, struct genl_info *info)
 765 {
 766         struct batadv_priv *bat_priv = info->user_ptr[0];
 767         u8 *dst;
 768         int ret = 0;
 769
 770         if (!info->attrs[BATADV_ATTR_ORIG_ADDRESS])
 771                 return -EINVAL;
 772
 773         dst = nla_data(info->attrs[BATADV_ATTR_ORIG_ADDRESS]);
 774
 775         batadv_tp_stop(bat_priv, dst, BATADV_TP_REASON_CANCEL);
 776
 777         return ret;
 778 }
 779
 780 /**
 781  * batadv_netlink_hardif_fill() - Fill message with hardif attributes
 782  * @msg: Netlink message to dump into
 783  * @bat_priv: the bat priv with all the soft interface information
 784  * @hard_iface: hard interface which was modified
 785  * @cmd: type of message to generate
 786  * @portid: Port making netlink request
 787  * @seq: sequence number for message
 788  * @flags: Additional flags for message
 789  * @cb: Control block containing additional options
 790  *
 791  * Return: 0 on success or negative error number in case of failure
 792  */
 793 static int batadv_netlink_hardif_fill(struct sk_buff *msg,
 794                                       struct batadv_priv *bat_priv,
 795                                       struct batadv_hard_iface *hard_iface,
 796                                       enum batadv_nl_commands cmd,
 797                                       u32 portid, u32 seq, int flags,
 798                                       struct netlink_callback *cb)
 799 {
 800         struct net_device *net_dev = hard_iface->net_dev;
 801         void *hdr;
 802
 803         hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, flags, cmd);
 804         if (!hdr)
 805                 return -ENOBUFS;
 806
 807         if (cb)
 808                 genl_dump_check_consistent(cb, hdr);
 809
 810         if (nla_put_u32(msg, BATADV_ATTR_MESH_IFINDEX,
 811                         bat_priv->soft_iface->ifindex))
 812                 goto nla_put_failure;
 813
 814         if (nla_put_string(msg, BATADV_ATTR_MESH_IFNAME,
 815                            bat_priv->soft_iface->name))
 816                 goto nla_put_failure;
 817
 818         if (nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX,
 819                         net_dev->ifindex) ||
 820             nla_put_string(msg, BATADV_ATTR_HARD_IFNAME,
 821                            net_dev->name) ||
 822             nla_put(msg, BATADV_ATTR_HARD_ADDRESS, ETH_ALEN,
 823                     net_dev->dev_addr))
 824                 goto nla_put_failure;
 825
 826         if (hard_iface->if_status == BATADV_IF_ACTIVE) {
 827                 if (nla_put_flag(msg, BATADV_ATTR_ACTIVE))
 828                         goto nla_put_failure;
 829         }
 830
 831         if (nla_put_u8(msg, BATADV_ATTR_HOP_PENALTY,
 832                        atomic_read(&hard_iface->hop_penalty)))
 833                 goto nla_put_failure;
 834
 835 #ifdef CONFIG_BATMAN_ADV_BATMAN_V
 836         if (nla_put_u32(msg, BATADV_ATTR_ELP_INTERVAL,
 837                         atomic_read(&hard_iface->bat_v.elp_interval)))
 838                 goto nla_put_failure;
 839
 840         if (nla_put_u32(msg, BATADV_ATTR_THROUGHPUT_OVERRIDE,
 841                         atomic_read(&hard_iface->bat_v.throughput_override)))
 842                 goto nla_put_failure;
 843 #endif /* CONFIG_BATMAN_ADV_BATMAN_V */
 844
 845         genlmsg_end(msg, hdr);
 846         return 0;
 847
 848 nla_put_failure:
 849         genlmsg_cancel(msg, hdr);
 850         return -EMSGSIZE;
 851 }
 852
 853 /**
 854  * batadv_netlink_notify_hardif() - send hardif attributes to listener
 855  * @bat_priv: the bat priv with all the soft interface information
 856  * @hard_iface: hard interface which was modified
 857  *
 858  * Return: 0 on success, < 0 on error
 859  */
 860 static int batadv_netlink_notify_hardif(struct batadv_priv *bat_priv,
 861                                         struct batadv_hard_iface *hard_iface)
 862 {
 863         struct sk_buff *msg;
 864         int ret;
 865
 866         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 867         if (!msg)
 868                 return -ENOMEM;
 869
 870         ret = batadv_netlink_hardif_fill(msg, bat_priv, hard_iface,
 871                                          BATADV_CMD_SET_HARDIF, 0, 0, 0, NULL);
 872         if (ret < 0) {
 873                 nlmsg_free(msg);
 874                 return ret;
 875         }
 876
 877         genlmsg_multicast_netns(&batadv_netlink_family,
 878                                 dev_net(bat_priv->soft_iface), msg, 0,
 879                                 BATADV_NL_MCGRP_CONFIG, GFP_KERNEL);
 880
 881         return 0;
 882 }
 883
 884 /**
 885  * batadv_netlink_get_hardif() - Get hardif attributes
 886  * @skb: Netlink message with request data
 887  * @info: receiver information
 888  *
 889  * Return: 0 on success or negative error number in case of failure
 890  */
 891 static int batadv_netlink_get_hardif(struct sk_buff *skb,
 892                                      struct genl_info *info)
 893 {
 894         struct batadv_hard_iface *hard_iface = info->user_ptr[1];
 895         struct batadv_priv *bat_priv = info->user_ptr[0];
 896         struct sk_buff *msg;
 897         int ret;
 898
 899         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 900         if (!msg)
 901                 return -ENOMEM;
 902
 903         ret = batadv_netlink_hardif_fill(msg, bat_priv, hard_iface,
 904                                          BATADV_CMD_GET_HARDIF,
 905                                          info->snd_portid, info->snd_seq, 0,
 906                                          NULL);
 907         if (ret < 0) {
 908                 nlmsg_free(msg);
 909                 return ret;
 910         }
 911
 912         ret = genlmsg_reply(msg, info);
 913
 914         return ret;
 915 }
 916
 917 /**
 918  * batadv_netlink_set_hardif() - Set hardif attributes
 919  * @skb: Netlink message with request data
 920  * @info: receiver information
 921  *
 922  * Return: 0 on success or negative error number in case of failure
 923  */
 924 static int batadv_netlink_set_hardif(struct sk_buff *skb,
 925                                      struct genl_info *info)
 926 {
 927         struct batadv_hard_iface *hard_iface = info->user_ptr[1];
 928         struct batadv_priv *bat_priv = info->user_ptr[0];
 929         struct nlattr *attr;
 930
 931         if (info->attrs[BATADV_ATTR_HOP_PENALTY]) {
 932                 attr = info->attrs[BATADV_ATTR_HOP_PENALTY];
 933
 934                 atomic_set(&hard_iface->hop_penalty, nla_get_u8(attr));
 935         }
 936
 937 #ifdef CONFIG_BATMAN_ADV_BATMAN_V
 938
 939         if (info->attrs[BATADV_ATTR_ELP_INTERVAL]) {
 940                 attr = info->attrs[BATADV_ATTR_ELP_INTERVAL];
 941
 942                 atomic_set(&hard_iface->bat_v.elp_interval, nla_get_u32(attr));
 943         }
 944
 945         if (info->attrs[BATADV_ATTR_THROUGHPUT_OVERRIDE]) {
 946                 attr = info->attrs[BATADV_ATTR_THROUGHPUT_OVERRIDE];
 947
 948                 atomic_set(&hard_iface->bat_v.throughput_override,
 949                            nla_get_u32(attr));
 950         }
 951 #endif /* CONFIG_BATMAN_ADV_BATMAN_V */
 952
 953         batadv_netlink_notify_hardif(bat_priv, hard_iface);
 954
 955         return 0;
 956 }
 957
 958 /**
 959  * batadv_netlink_dump_hardif() - Dump all hard interface into a messages
 960  * @msg: Netlink message to dump into
 961  * @cb: Parameters from query
 962  *
 963  * Return: error code, or length of reply message on success
 964  */
 965 static int
 966 batadv_netlink_dump_hardif(struct sk_buff *msg, struct netlink_callback *cb)
 967 {
 968         struct net *net = sock_net(cb->skb->sk);
 969         struct net_device *soft_iface;
 970         struct batadv_hard_iface *hard_iface;
 971         struct batadv_priv *bat_priv;
 972         int ifindex;
 973         int portid = NETLINK_CB(cb->skb).portid;
 974         int skip = cb->args[0];
 975         int i = 0;
 976
 977         ifindex = batadv_netlink_get_ifindex(cb->nlh,
 978                                              BATADV_ATTR_MESH_IFINDEX);
 979         if (!ifindex)
 980                 return -EINVAL;
 981
 982         soft_iface = dev_get_by_index(net, ifindex);
 983         if (!soft_iface)
 984                 return -ENODEV;
 985
 986         if (!batadv_softif_is_valid(soft_iface)) {
 987                 dev_put(soft_iface);
 988                 return -ENODEV;
 989         }
 990
 991         bat_priv = netdev_priv(soft_iface);
 992
 993         rtnl_lock();
 994         cb->seq = batadv_hardif_generation << 1 | 1;
 995
 996         list_for_each_entry(hard_iface, &batadv_hardif_list, list) {
 997                 if (hard_iface->soft_iface != soft_iface)
 998                         continue;
 999
1000                 if (i++ < skip)
1001                         continue;
1002
1003                 if (batadv_netlink_hardif_fill(msg, bat_priv, hard_iface,
1004                                                BATADV_CMD_GET_HARDIF,
1005                                                portid, cb->nlh->nlmsg_seq,
1006                                                NLM_F_MULTI, cb)) {
1007                         i--;
1008                         break;
1009                 }
1010         }
1011
1012         rtnl_unlock();
1013
1014         dev_put(soft_iface);
1015
1016         cb->args[0] = i;
1017
1018         return msg->len;
1019 }
1020
1021 /**
1022  * batadv_netlink_vlan_fill() - Fill message with vlan attributes
1023  * @msg: Netlink message to dump into
1024  * @bat_priv: the bat priv with all the soft interface information
1025  * @vlan: vlan which was modified
1026  * @cmd: type of message to generate
1027  * @portid: Port making netlink request
1028  * @seq: sequence number for message
1029  * @flags: Additional flags for message
1030  *
1031  * Return: 0 on success or negative error number in case of failure
1032  */
1033 static int batadv_netlink_vlan_fill(struct sk_buff *msg,
1034                                     struct batadv_priv *bat_priv,
1035                                     struct batadv_softif_vlan *vlan,
1036                                     enum batadv_nl_commands cmd,
1037                                     u32 portid, u32 seq, int flags)
1038 {
1039         void *hdr;
1040
1041         hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, flags, cmd);
1042         if (!hdr)
1043                 return -ENOBUFS;
1044
1045         if (nla_put_u32(msg, BATADV_ATTR_MESH_IFINDEX,
1046                         bat_priv->soft_iface->ifindex))
1047                 goto nla_put_failure;
1048
1049         if (nla_put_string(msg, BATADV_ATTR_MESH_IFNAME,
1050                            bat_priv->soft_iface->name))
1051                 goto nla_put_failure;
1052
1053         if (nla_put_u32(msg, BATADV_ATTR_VLANID, vlan->vid & VLAN_VID_MASK))
1054                 goto nla_put_failure;
1055
1056         if (nla_put_u8(msg, BATADV_ATTR_AP_ISOLATION_ENABLED,
1057                        !!atomic_read(&vlan->ap_isolation)))
1058                 goto nla_put_failure;
1059
1060         genlmsg_end(msg, hdr);
1061         return 0;
1062
1063 nla_put_failure:
1064         genlmsg_cancel(msg, hdr);
1065         return -EMSGSIZE;
1066 }
1067
1068 /**
1069  * batadv_netlink_notify_vlan() - send vlan attributes to listener
1070  * @bat_priv: the bat priv with all the soft interface information
1071  * @vlan: vlan which was modified
1072  *
1073  * Return: 0 on success, < 0 on error
1074  */
1075 static int batadv_netlink_notify_vlan(struct batadv_priv *bat_priv,
1076                                       struct batadv_softif_vlan *vlan)
1077 {
1078         struct sk_buff *msg;
1079         int ret;
1080
1081         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1082         if (!msg)
1083                 return -ENOMEM;
1084
1085         ret = batadv_netlink_vlan_fill(msg, bat_priv, vlan,
1086                                        BATADV_CMD_SET_VLAN, 0, 0, 0);
1087         if (ret < 0) {
1088                 nlmsg_free(msg);
1089                 return ret;
1090         }
1091
1092         genlmsg_multicast_netns(&batadv_netlink_family,
1093                                 dev_net(bat_priv->soft_iface), msg, 0,
1094                                 BATADV_NL_MCGRP_CONFIG, GFP_KERNEL);
1095
1096         return 0;
1097 }
1098
1099 /**
1100  * batadv_netlink_get_vlan() - Get vlan attributes
1101  * @skb: Netlink message with request data
1102  * @info: receiver information
1103  *
1104  * Return: 0 on success or negative error number in case of failure
1105  */
1106 static int batadv_netlink_get_vlan(struct sk_buff *skb, struct genl_info *info)
1107 {
1108         struct batadv_softif_vlan *vlan = info->user_ptr[1];
1109         struct batadv_priv *bat_priv = info->user_ptr[0];
1110         struct sk_buff *msg;
1111         int ret;
1112
1113         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1114         if (!msg)
1115                 return -ENOMEM;
1116
1117         ret = batadv_netlink_vlan_fill(msg, bat_priv, vlan, BATADV_CMD_GET_VLAN,
1118                                        info->snd_portid, info->snd_seq, 0);
1119         if (ret < 0) {
1120                 nlmsg_free(msg);
1121                 return ret;
1122         }
1123
1124         ret = genlmsg_reply(msg, info);
1125
1126         return ret;
1127 }
1128
1129 /**
1130  * batadv_netlink_set_vlan() - Get vlan attributes
1131  * @skb: Netlink message with request data
1132  * @info: receiver information
1133  *
1134  * Return: 0 on success or negative error number in case of failure
1135  */
1136 static int batadv_netlink_set_vlan(struct sk_buff *skb, struct genl_info *info)
1137 {
1138         struct batadv_softif_vlan *vlan = info->user_ptr[1];
1139         struct batadv_priv *bat_priv = info->user_ptr[0];
1140         struct nlattr *attr;
1141
1142         if (info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED]) {
1143                 attr = info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED];
1144
1145                 atomic_set(&vlan->ap_isolation, !!nla_get_u8(attr));
1146         }
1147
1148         batadv_netlink_notify_vlan(bat_priv, vlan);
1149
1150         return 0;
1151 }
1152
1153 /**
1154  * batadv_get_softif_from_info() - Retrieve soft interface from genl attributes
1155  * @net: the applicable net namespace
1156  * @info: receiver information
1157  *
1158  * Return: Pointer to soft interface (with increased refcnt) on success, error
1159  *  pointer on error
1160  */
1161 static struct net_device *
1162 batadv_get_softif_from_info(struct net *net, struct genl_info *info)
1163 {
1164         struct net_device *soft_iface;
1165         int ifindex;
1166
1167         if (!info->attrs[BATADV_ATTR_MESH_IFINDEX])
1168                 return ERR_PTR(-EINVAL);
1169
1170         ifindex = nla_get_u32(info->attrs[BATADV_ATTR_MESH_IFINDEX]);
1171
1172         soft_iface = dev_get_by_index(net, ifindex);
1173         if (!soft_iface)
1174                 return ERR_PTR(-ENODEV);
1175
1176         if (!batadv_softif_is_valid(soft_iface))
1177                 goto err_put_softif;
1178
1179         return soft_iface;
1180
1181 err_put_softif:
1182         dev_put(soft_iface);
1183
1184         return ERR_PTR(-EINVAL);
1185 }
1186
1187 /**
1188  * batadv_get_hardif_from_info() - Retrieve hardif from genl attributes
1189  * @bat_priv: the bat priv with all the soft interface information
1190  * @net: the applicable net namespace
1191  * @info: receiver information
1192  *
1193  * Return: Pointer to hard interface (with increased refcnt) on success, error
1194  *  pointer on error
1195  */
1196 static struct batadv_hard_iface *
1197 batadv_get_hardif_from_info(struct batadv_priv *bat_priv, struct net *net,
1198                             struct genl_info *info)
1199 {
1200         struct batadv_hard_iface *hard_iface;
1201         struct net_device *hard_dev;
1202         unsigned int hardif_index;
1203
1204         if (!info->attrs[BATADV_ATTR_HARD_IFINDEX])
1205                 return ERR_PTR(-EINVAL);
1206
1207         hardif_index = nla_get_u32(info->attrs[BATADV_ATTR_HARD_IFINDEX]);
1208
1209         hard_dev = dev_get_by_index(net, hardif_index);
1210         if (!hard_dev)
1211                 return ERR_PTR(-ENODEV);
1212
1213         hard_iface = batadv_hardif_get_by_netdev(hard_dev);
1214         if (!hard_iface)
1215                 goto err_put_harddev;
1216
1217         if (hard_iface->soft_iface != bat_priv->soft_iface)
1218                 goto err_put_hardif;
1219
1220         /* hard_dev is referenced by hard_iface and not needed here */
1221         dev_put(hard_dev);
1222
1223         return hard_iface;
1224
1225 err_put_hardif:
1226         batadv_hardif_put(hard_iface);
1227 err_put_harddev:
1228         dev_put(hard_dev);
1229
1230         return ERR_PTR(-EINVAL);
1231 }
1232
1233 /**
1234  * batadv_get_vlan_from_info() - Retrieve vlan from genl attributes
1235  * @bat_priv: the bat priv with all the soft interface information
1236  * @net: the applicable net namespace
1237  * @info: receiver information
1238  *
1239  * Return: Pointer to vlan on success (with increased refcnt), error pointer
1240  *  on error
1241  */
1242 static struct batadv_softif_vlan *
1243 batadv_get_vlan_from_info(struct batadv_priv *bat_priv, struct net *net,
1244                           struct genl_info *info)
1245 {
1246         struct batadv_softif_vlan *vlan;
1247         u16 vid;
1248
1249         if (!info->attrs[BATADV_ATTR_VLANID])
1250                 return ERR_PTR(-EINVAL);
1251
1252         vid = nla_get_u16(info->attrs[BATADV_ATTR_VLANID]);
1253
1254         vlan = batadv_softif_vlan_get(bat_priv, vid | BATADV_VLAN_HAS_TAG);
1255         if (!vlan)
1256                 return ERR_PTR(-ENOENT);
1257
1258         return vlan;
1259 }
1260
1261 /**
1262  * batadv_pre_doit() - Prepare batman-adv genl doit request
1263  * @ops: requested netlink operation
1264  * @skb: Netlink message with request data
1265  * @info: receiver information
1266  *
1267  * Return: 0 on success or negative error number in case of failure
1268  */
1269 static int batadv_pre_doit(const struct genl_split_ops *ops,
1270                            struct sk_buff *skb,
1271                            struct genl_info *info)
1272 {
1273         struct net *net = genl_info_net(info);
1274         struct batadv_hard_iface *hard_iface;
1275         struct batadv_priv *bat_priv = NULL;
1276         struct batadv_softif_vlan *vlan;
1277         struct net_device *soft_iface;
1278         u8 user_ptr1_flags;
1279         u8 mesh_dep_flags;
1280         int ret;
1281
1282         user_ptr1_flags = BATADV_FLAG_NEED_HARDIF | BATADV_FLAG_NEED_VLAN;
1283         if (WARN_ON(hweight8(ops->internal_flags & user_ptr1_flags) > 1))
1284                 return -EINVAL;
1285
1286         mesh_dep_flags = BATADV_FLAG_NEED_HARDIF | BATADV_FLAG_NEED_VLAN;
1287         if (WARN_ON((ops->internal_flags & mesh_dep_flags) &&
1288                     (~ops->internal_flags & BATADV_FLAG_NEED_MESH)))
1289                 return -EINVAL;
1290
1291         if (ops->internal_flags & BATADV_FLAG_NEED_MESH) {
1292                 soft_iface = batadv_get_softif_from_info(net, info);
1293                 if (IS_ERR(soft_iface))
1294                         return PTR_ERR(soft_iface);
1295
1296                 bat_priv = netdev_priv(soft_iface);
1297                 info->user_ptr[0] = bat_priv;
1298         }
1299
1300         if (ops->internal_flags & BATADV_FLAG_NEED_HARDIF) {
1301                 hard_iface = batadv_get_hardif_from_info(bat_priv, net, info);
1302                 if (IS_ERR(hard_iface)) {
1303                         ret = PTR_ERR(hard_iface);
1304                         goto err_put_softif;
1305                 }
1306
1307                 info->user_ptr[1] = hard_iface;
1308         }
1309
1310         if (ops->internal_flags & BATADV_FLAG_NEED_VLAN) {
1311                 vlan = batadv_get_vlan_from_info(bat_priv, net, info);
1312                 if (IS_ERR(vlan)) {
1313                         ret = PTR_ERR(vlan);
1314                         goto err_put_softif;
1315                 }
1316
1317                 info->user_ptr[1] = vlan;
1318         }
1319
1320         return 0;
1321
1322 err_put_softif:
1323         if (bat_priv)
1324                 dev_put(bat_priv->soft_iface);
1325
1326         return ret;
1327 }
1328
1329 /**
1330  * batadv_post_doit() - End batman-adv genl doit request
1331  * @ops: requested netlink operation
1332  * @skb: Netlink message with request data
1333  * @info: receiver information
1334  */
1335 static void batadv_post_doit(const struct genl_split_ops *ops,
1336                              struct sk_buff *skb,
1337                              struct genl_info *info)
1338 {
1339         struct batadv_hard_iface *hard_iface;
1340         struct batadv_softif_vlan *vlan;
1341         struct batadv_priv *bat_priv;
1342
1343         if (ops->internal_flags & BATADV_FLAG_NEED_HARDIF &&
1344             info->user_ptr[1]) {
1345                 hard_iface = info->user_ptr[1];
1346
1347                 batadv_hardif_put(hard_iface);
1348         }
1349
1350         if (ops->internal_flags & BATADV_FLAG_NEED_VLAN && info->user_ptr[1]) {
1351                 vlan = info->user_ptr[1];
1352                 batadv_softif_vlan_put(vlan);
1353         }
1354
1355         if (ops->internal_flags & BATADV_FLAG_NEED_MESH && info->user_ptr[0]) {
1356                 bat_priv = info->user_ptr[0];
1357                 dev_put(bat_priv->soft_iface);
1358         }
1359 }
1360
1361 static const struct genl_small_ops batadv_netlink_ops[] = {
1362         {
1363                 .cmd = BATADV_CMD_GET_MESH,
1364                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1365                 /* can be retrieved by unprivileged users */
1366                 .doit = batadv_netlink_get_mesh,
1367                 .internal_flags = BATADV_FLAG_NEED_MESH,
1368         },
1369         {
1370                 .cmd = BATADV_CMD_TP_METER,
1371                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1372                 .flags = GENL_UNS_ADMIN_PERM,
1373                 .doit = batadv_netlink_tp_meter_start,
1374                 .internal_flags = BATADV_FLAG_NEED_MESH,
1375         },
1376         {
1377                 .cmd = BATADV_CMD_TP_METER_CANCEL,
1378                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1379                 .flags = GENL_UNS_ADMIN_PERM,
1380                 .doit = batadv_netlink_tp_meter_cancel,
1381                 .internal_flags = BATADV_FLAG_NEED_MESH,
1382         },
1383         {
1384                 .cmd = BATADV_CMD_GET_ROUTING_ALGOS,
1385                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1386                 .flags = GENL_UNS_ADMIN_PERM,
1387                 .dumpit = batadv_algo_dump,
1388         },
1389         {
1390                 .cmd = BATADV_CMD_GET_HARDIF,
1391                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1392                 /* can be retrieved by unprivileged users */
1393                 .dumpit = batadv_netlink_dump_hardif,
1394                 .doit = batadv_netlink_get_hardif,
1395                 .internal_flags = BATADV_FLAG_NEED_MESH |
1396                                   BATADV_FLAG_NEED_HARDIF,
1397         },
1398         {
1399                 .cmd = BATADV_CMD_GET_TRANSTABLE_LOCAL,
1400                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1401                 .flags = GENL_UNS_ADMIN_PERM,
1402                 .dumpit = batadv_tt_local_dump,
1403         },
1404         {
1405                 .cmd = BATADV_CMD_GET_TRANSTABLE_GLOBAL,
1406                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1407                 .flags = GENL_UNS_ADMIN_PERM,
1408                 .dumpit = batadv_tt_global_dump,
1409         },
1410         {
1411                 .cmd = BATADV_CMD_GET_ORIGINATORS,
1412                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1413                 .flags = GENL_UNS_ADMIN_PERM,
1414                 .dumpit = batadv_orig_dump,
1415         },
1416         {
1417                 .cmd = BATADV_CMD_GET_NEIGHBORS,
1418                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1419                 .flags = GENL_UNS_ADMIN_PERM,
1420                 .dumpit = batadv_hardif_neigh_dump,
1421         },
1422         {
1423                 .cmd = BATADV_CMD_GET_GATEWAYS,
1424                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1425                 .flags = GENL_UNS_ADMIN_PERM,
1426                 .dumpit = batadv_gw_dump,
1427         },
1428         {
1429                 .cmd = BATADV_CMD_GET_BLA_CLAIM,
1430                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1431                 .flags = GENL_UNS_ADMIN_PERM,
1432                 .dumpit = batadv_bla_claim_dump,
1433         },
1434         {
1435                 .cmd = BATADV_CMD_GET_BLA_BACKBONE,
1436                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1437                 .flags = GENL_UNS_ADMIN_PERM,
1438                 .dumpit = batadv_bla_backbone_dump,
1439         },
1440         {
1441                 .cmd = BATADV_CMD_GET_DAT_CACHE,
1442                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1443                 .flags = GENL_UNS_ADMIN_PERM,
1444                 .dumpit = batadv_dat_cache_dump,
1445         },
1446         {
1447                 .cmd = BATADV_CMD_GET_MCAST_FLAGS,
1448                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1449                 .flags = GENL_UNS_ADMIN_PERM,
1450                 .dumpit = batadv_mcast_flags_dump,
1451         },
1452         {
1453                 .cmd = BATADV_CMD_SET_MESH,
1454                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1455                 .flags = GENL_UNS_ADMIN_PERM,
1456                 .doit = batadv_netlink_set_mesh,
1457                 .internal_flags = BATADV_FLAG_NEED_MESH,
1458         },
1459         {
1460                 .cmd = BATADV_CMD_SET_HARDIF,
1461                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1462                 .flags = GENL_UNS_ADMIN_PERM,
1463                 .doit = batadv_netlink_set_hardif,
1464                 .internal_flags = BATADV_FLAG_NEED_MESH |
1465                                   BATADV_FLAG_NEED_HARDIF,
1466         },
1467         {
1468                 .cmd = BATADV_CMD_GET_VLAN,
1469                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1470                 /* can be retrieved by unprivileged users */
1471                 .doit = batadv_netlink_get_vlan,
1472                 .internal_flags = BATADV_FLAG_NEED_MESH |
1473                                   BATADV_FLAG_NEED_VLAN,
1474         },
1475         {
1476                 .cmd = BATADV_CMD_SET_VLAN,
1477                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1478                 .flags = GENL_UNS_ADMIN_PERM,
1479                 .doit = batadv_netlink_set_vlan,
1480                 .internal_flags = BATADV_FLAG_NEED_MESH |
1481                                   BATADV_FLAG_NEED_VLAN,
1482         },
1483 };
1484
1485 struct genl_family batadv_netlink_family __ro_after_init = {
1486         .hdrsize = 0,
1487         .name = BATADV_NL_NAME,
1488         .version = 1,
1489         .maxattr = BATADV_ATTR_MAX,
1490         .policy = batadv_netlink_policy,
1491         .netnsok = true,
1492         .pre_doit = batadv_pre_doit,
1493         .post_doit = batadv_post_doit,
1494         .module = THIS_MODULE,
1495         .small_ops = batadv_netlink_ops,
1496         .n_small_ops = ARRAY_SIZE(batadv_netlink_ops),
1497         .resv_start_op = BATADV_CMD_SET_VLAN + 1,
1498         .mcgrps = batadv_netlink_mcgrps,
1499         .n_mcgrps = ARRAY_SIZE(batadv_netlink_mcgrps),
1500 };
1501
1502 /**
1503  * batadv_netlink_register() - register batadv genl netlink family
1504  */
1505 void __init batadv_netlink_register(void)
1506 {
1507         int ret;
1508
1509         ret = genl_register_family(&batadv_netlink_family);
1510         if (ret)
1511                 pr_warn("unable to register netlink family");
1512 }
1513
1514 /**
1515  * batadv_netlink_unregister() - unregister batadv genl netlink family
1516  */
1517 void batadv_netlink_unregister(void)
1518 {
1519         genl_unregister_family(&batadv_netlink_family);
1520 }