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