net/batman-adv/soft-interface.c

   1 /* Copyright (C) 2007-2012 B.A.T.M.A.N. contributors:
   2  *
   3  * Marek Lindner, Simon Wunderlich
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of version 2 of the GNU General Public
   7  * License as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  12  * General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  17  * 02110-1301, USA
  18  */
  19
  20 #include "main.h"
  21 #include "soft-interface.h"
  22 #include "hard-interface.h"
  23 #include "routing.h"
  24 #include "send.h"
  25 #include "debugfs.h"
  26 #include "translation-table.h"
  27 #include "hash.h"
  28 #include "gateway_common.h"
  29 #include "gateway_client.h"
  30 #include "sysfs.h"
  31 #include "originator.h"
  32 #include <linux/slab.h>
  33 #include <linux/ethtool.h>
  34 #include <linux/etherdevice.h>
  35 #include <linux/if_vlan.h>
  36 #include "unicast.h"
  37 #include "bridge_loop_avoidance.h"
  38
  39
  40 static int batadv_get_settings(struct net_device *dev, struct ethtool_cmd *cmd);
  41 static void batadv_get_drvinfo(struct net_device *dev,
  42                                struct ethtool_drvinfo *info);
  43 static u32 batadv_get_msglevel(struct net_device *dev);
  44 static void batadv_set_msglevel(struct net_device *dev, u32 value);
  45 static u32 batadv_get_link(struct net_device *dev);
  46 static void batadv_get_strings(struct net_device *dev, u32 stringset, u8 *data);
  47 static void batadv_get_ethtool_stats(struct net_device *dev,
  48                                      struct ethtool_stats *stats, u64 *data);
  49 static int batadv_get_sset_count(struct net_device *dev, int stringset);
  50
  51 static const struct ethtool_ops batadv_ethtool_ops = {
  52         .get_settings = batadv_get_settings,
  53         .get_drvinfo = batadv_get_drvinfo,
  54         .get_msglevel = batadv_get_msglevel,
  55         .set_msglevel = batadv_set_msglevel,
  56         .get_link = batadv_get_link,
  57         .get_strings = batadv_get_strings,
  58         .get_ethtool_stats = batadv_get_ethtool_stats,
  59         .get_sset_count = batadv_get_sset_count,
  60 };
  61
  62 int batadv_skb_head_push(struct sk_buff *skb, unsigned int len)
  63 {
  64         int result;
  65
  66         /* TODO: We must check if we can release all references to non-payload
  67          * data using skb_header_release in our skbs to allow skb_cow_header to
  68          * work optimally. This means that those skbs are not allowed to read
  69          * or write any data which is before the current position of skb->data
  70          * after that call and thus allow other skbs with the same data buffer
  71          * to write freely in that area.
  72          */
  73         result = skb_cow_head(skb, len);
  74         if (result < 0)
  75                 return result;
  76
  77         skb_push(skb, len);
  78         return 0;
  79 }
  80
  81 static int batadv_interface_open(struct net_device *dev)
  82 {
  83         netif_start_queue(dev);
  84         return 0;
  85 }
  86
  87 static int batadv_interface_release(struct net_device *dev)
  88 {
  89         netif_stop_queue(dev);
  90         return 0;
  91 }
  92
  93 static struct net_device_stats *batadv_interface_stats(struct net_device *dev)
  94 {
  95         struct batadv_priv *bat_priv = netdev_priv(dev);
  96         struct net_device_stats *stats = &bat_priv->stats;
  97
  98         stats->tx_packets = batadv_sum_counter(bat_priv, BATADV_CNT_TX);
  99         stats->tx_bytes = batadv_sum_counter(bat_priv, BATADV_CNT_TX_BYTES);
 100         stats->tx_dropped = batadv_sum_counter(bat_priv, BATADV_CNT_TX_DROPPED);
 101         stats->rx_packets = batadv_sum_counter(bat_priv, BATADV_CNT_RX);
 102         stats->rx_bytes = batadv_sum_counter(bat_priv, BATADV_CNT_RX_BYTES);
 103         return stats;
 104 }
 105
 106 static int batadv_interface_set_mac_addr(struct net_device *dev, void *p)
 107 {
 108         struct batadv_priv *bat_priv = netdev_priv(dev);
 109         struct sockaddr *addr = p;
 110         uint8_t old_addr[ETH_ALEN];
 111
 112         if (!is_valid_ether_addr(addr->sa_data))
 113                 return -EADDRNOTAVAIL;
 114
 115         memcpy(old_addr, dev->dev_addr, ETH_ALEN);
 116         memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
 117
 118         /* only modify transtable if it has been initialized before */
 119         if (atomic_read(&bat_priv->mesh_state) == BATADV_MESH_ACTIVE) {
 120                 batadv_tt_local_remove(bat_priv, old_addr,
 121                                        "mac address changed", false);
 122                 batadv_tt_local_add(dev, addr->sa_data, BATADV_NULL_IFINDEX);
 123         }
 124
 125         dev->addr_assign_type &= ~NET_ADDR_RANDOM;
 126         return 0;
 127 }
 128
 129 static int batadv_interface_change_mtu(struct net_device *dev, int new_mtu)
 130 {
 131         /* check ranges */
 132         if ((new_mtu < 68) || (new_mtu > batadv_hardif_min_mtu(dev)))
 133                 return -EINVAL;
 134
 135         dev->mtu = new_mtu;
 136
 137         return 0;
 138 }
 139
 140 static int batadv_interface_tx(struct sk_buff *skb,
 141                                struct net_device *soft_iface)
 142 {
 143         struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
 144         struct batadv_priv *bat_priv = netdev_priv(soft_iface);
 145         struct batadv_hard_iface *primary_if = NULL;
 146         struct batadv_bcast_packet *bcast_packet;
 147         struct vlan_ethhdr *vhdr;
 148         __be16 ethertype = __constant_htons(BATADV_ETH_P_BATMAN);
 149         static const uint8_t stp_addr[ETH_ALEN] = {0x01, 0x80, 0xC2, 0x00,
 150                                                    0x00, 0x00};
 151         static const uint8_t ectp_addr[ETH_ALEN] = {0xCF, 0x00, 0x00, 0x00,
 152                                                     0x00, 0x00};
 153         unsigned int header_len = 0;
 154         int data_len = skb->len, ret;
 155         short vid __maybe_unused = -1;
 156         bool do_bcast = false;
 157         uint32_t seqno;
 158
 159         if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE)
 160                 goto dropped;
 161
 162         soft_iface->trans_start = jiffies;
 163
 164         switch (ntohs(ethhdr->h_proto)) {
 165         case ETH_P_8021Q:
 166                 vhdr = (struct vlan_ethhdr *)skb->data;
 167                 vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK;
 168
 169                 if (vhdr->h_vlan_encapsulated_proto != ethertype)
 170                         break;
 171
 172                 /* fall through */
 173         case BATADV_ETH_P_BATMAN:
 174                 goto dropped;
 175         }
 176
 177         if (batadv_bla_tx(bat_priv, skb, vid))
 178                 goto dropped;
 179
 180         /* Register the client MAC in the transtable */
 181         batadv_tt_local_add(soft_iface, ethhdr->h_source, skb->skb_iif);
 182
 183         /* don't accept stp packets. STP does not help in meshes.
 184          * better use the bridge loop avoidance ...
 185          *
 186          * The same goes for ECTP sent at least by some Cisco Switches,
 187          * it might confuse the mesh when used with bridge loop avoidance.
 188          */
 189         if (batadv_compare_eth(ethhdr->h_dest, stp_addr))
 190                 goto dropped;
 191
 192         if (batadv_compare_eth(ethhdr->h_dest, ectp_addr))
 193                 goto dropped;
 194
 195         if (is_multicast_ether_addr(ethhdr->h_dest)) {
 196                 do_bcast = true;
 197
 198                 switch (atomic_read(&bat_priv->gw_mode)) {
 199                 case BATADV_GW_MODE_SERVER:
 200                         /* gateway servers should not send dhcp
 201                          * requests into the mesh
 202                          */
 203                         ret = batadv_gw_is_dhcp_target(skb, &header_len);
 204                         if (ret)
 205                                 goto dropped;
 206                         break;
 207                 case BATADV_GW_MODE_CLIENT:
 208                         /* gateway clients should send dhcp requests
 209                          * via unicast to their gateway
 210                          */
 211                         ret = batadv_gw_is_dhcp_target(skb, &header_len);
 212                         if (ret)
 213                                 do_bcast = false;
 214                         break;
 215                 case BATADV_GW_MODE_OFF:
 216                 default:
 217                         break;
 218                 }
 219         }
 220
 221         /* ethernet packet should be broadcasted */
 222         if (do_bcast) {
 223                 primary_if = batadv_primary_if_get_selected(bat_priv);
 224                 if (!primary_if)
 225                         goto dropped;
 226
 227                 if (batadv_skb_head_push(skb, sizeof(*bcast_packet)) < 0)
 228                         goto dropped;
 229
 230                 bcast_packet = (struct batadv_bcast_packet *)skb->data;
 231                 bcast_packet->header.version = BATADV_COMPAT_VERSION;
 232                 bcast_packet->header.ttl = BATADV_TTL;
 233
 234                 /* batman packet type: broadcast */
 235                 bcast_packet->header.packet_type = BATADV_BCAST;
 236                 bcast_packet->reserved = 0;
 237
 238                 /* hw address of first interface is the orig mac because only
 239                  * this mac is known throughout the mesh
 240                  */
 241                 memcpy(bcast_packet->orig,
 242                        primary_if->net_dev->dev_addr, ETH_ALEN);
 243
 244                 /* set broadcast sequence number */
 245                 seqno = atomic_inc_return(&bat_priv->bcast_seqno);
 246                 bcast_packet->seqno = htonl(seqno);
 247
 248                 batadv_add_bcast_packet_to_list(bat_priv, skb, 1);
 249
 250                 /* a copy is stored in the bcast list, therefore removing
 251                  * the original skb.
 252                  */
 253                 kfree_skb(skb);
 254
 255         /* unicast packet */
 256         } else {
 257                 if (atomic_read(&bat_priv->gw_mode) != BATADV_GW_MODE_OFF) {
 258                         ret = batadv_gw_out_of_range(bat_priv, skb, ethhdr);
 259                         if (ret)
 260                                 goto dropped;
 261                 }
 262
 263                 ret = batadv_unicast_send_skb(skb, bat_priv);
 264                 if (ret != 0)
 265                         goto dropped_freed;
 266         }
 267
 268         batadv_inc_counter(bat_priv, BATADV_CNT_TX);
 269         batadv_add_counter(bat_priv, BATADV_CNT_TX_BYTES, data_len);
 270         goto end;
 271
 272 dropped:
 273         kfree_skb(skb);
 274 dropped_freed:
 275         batadv_inc_counter(bat_priv, BATADV_CNT_TX_DROPPED);
 276 end:
 277         if (primary_if)
 278                 batadv_hardif_free_ref(primary_if);
 279         return NETDEV_TX_OK;
 280 }
 281
 282 void batadv_interface_rx(struct net_device *soft_iface,
 283                          struct sk_buff *skb, struct batadv_hard_iface *recv_if,
 284                          int hdr_size, struct batadv_orig_node *orig_node)
 285 {
 286         struct batadv_priv *bat_priv = netdev_priv(soft_iface);
 287         struct ethhdr *ethhdr;
 288         struct vlan_ethhdr *vhdr;
 289         struct batadv_header *batadv_header = (struct batadv_header *)skb->data;
 290         short vid __maybe_unused = -1;
 291         __be16 ethertype = __constant_htons(BATADV_ETH_P_BATMAN);
 292         bool is_bcast;
 293
 294         is_bcast = (batadv_header->packet_type == BATADV_BCAST);
 295
 296         /* check if enough space is available for pulling, and pull */
 297         if (!pskb_may_pull(skb, hdr_size))
 298                 goto dropped;
 299
 300         skb_pull_rcsum(skb, hdr_size);
 301         skb_reset_mac_header(skb);
 302
 303         ethhdr = (struct ethhdr *)skb_mac_header(skb);
 304
 305         switch (ntohs(ethhdr->h_proto)) {
 306         case ETH_P_8021Q:
 307                 vhdr = (struct vlan_ethhdr *)skb->data;
 308                 vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK;
 309
 310                 if (vhdr->h_vlan_encapsulated_proto != ethertype)
 311                         break;
 312
 313                 /* fall through */
 314         case BATADV_ETH_P_BATMAN:
 315                 goto dropped;
 316         }
 317
 318         /* skb->dev & skb->pkt_type are set here */
 319         if (unlikely(!pskb_may_pull(skb, ETH_HLEN)))
 320                 goto dropped;
 321         skb->protocol = eth_type_trans(skb, soft_iface);
 322
 323         /* should not be necessary anymore as we use skb_pull_rcsum()
 324          * TODO: please verify this and remove this TODO
 325          * -- Dec 21st 2009, Simon Wunderlich
 326          */
 327
 328         /* skb->ip_summed = CHECKSUM_UNNECESSARY; */
 329
 330         batadv_inc_counter(bat_priv, BATADV_CNT_RX);
 331         batadv_add_counter(bat_priv, BATADV_CNT_RX_BYTES,
 332                            skb->len + ETH_HLEN);
 333
 334         soft_iface->last_rx = jiffies;
 335
 336         if (orig_node)
 337                 batadv_tt_add_temporary_global_entry(bat_priv, orig_node,
 338                                                      ethhdr->h_source);
 339
 340         if (batadv_is_ap_isolated(bat_priv, ethhdr->h_source, ethhdr->h_dest))
 341                 goto dropped;
 342
 343         /* Let the bridge loop avoidance check the packet. If will
 344          * not handle it, we can safely push it up.
 345          */
 346         if (batadv_bla_rx(bat_priv, skb, vid, is_bcast))
 347                 goto out;
 348
 349         netif_rx(skb);
 350         goto out;
 351
 352 dropped:
 353         kfree_skb(skb);
 354 out:
 355         return;
 356 }
 357
 358 /* batman-adv network devices have devices nesting below it and are a special
 359  * "super class" of normal network devices; split their locks off into a
 360  * separate class since they always nest.
 361  */
 362 static struct lock_class_key batadv_netdev_xmit_lock_key;
 363 static struct lock_class_key batadv_netdev_addr_lock_key;
 364
 365 /**
 366  * batadv_set_lockdep_class_one - Set lockdep class for a single tx queue
 367  * @dev: device which owns the tx queue
 368  * @txq: tx queue to modify
 369  * @_unused: always NULL
 370  */
 371 static void batadv_set_lockdep_class_one(struct net_device *dev,
 372                                          struct netdev_queue *txq,
 373                                          void *_unused)
 374 {
 375         lockdep_set_class(&txq->_xmit_lock, &batadv_netdev_xmit_lock_key);
 376 }
 377
 378 /**
 379  * batadv_set_lockdep_class - Set txq and addr_list lockdep class
 380  * @dev: network device to modify
 381  */
 382 static void batadv_set_lockdep_class(struct net_device *dev)
 383 {
 384         lockdep_set_class(&dev->addr_list_lock, &batadv_netdev_addr_lock_key);
 385         netdev_for_each_tx_queue(dev, batadv_set_lockdep_class_one, NULL);
 386 }
 387
 388 /**
 389  * batadv_softif_init - Late stage initialization of soft interface
 390  * @dev: registered network device to modify
 391  *
 392  * Returns error code on failures
 393  */
 394 static int batadv_softif_init(struct net_device *dev)
 395 {
 396         batadv_set_lockdep_class(dev);
 397
 398         return 0;
 399 }
 400
 401 static const struct net_device_ops batadv_netdev_ops = {
 402         .ndo_init = batadv_softif_init,
 403         .ndo_open = batadv_interface_open,
 404         .ndo_stop = batadv_interface_release,
 405         .ndo_get_stats = batadv_interface_stats,
 406         .ndo_set_mac_address = batadv_interface_set_mac_addr,
 407         .ndo_change_mtu = batadv_interface_change_mtu,
 408         .ndo_start_xmit = batadv_interface_tx,
 409         .ndo_validate_addr = eth_validate_addr
 410 };
 411
 412 static void batadv_interface_setup(struct net_device *dev)
 413 {
 414         struct batadv_priv *priv = netdev_priv(dev);
 415
 416         ether_setup(dev);
 417
 418         dev->netdev_ops = &batadv_netdev_ops;
 419         dev->destructor = free_netdev;
 420         dev->tx_queue_len = 0;
 421
 422         /* can't call min_mtu, because the needed variables
 423          * have not been initialized yet
 424          */
 425         dev->mtu = ETH_DATA_LEN;
 426         /* reserve more space in the skbuff for our header */
 427         dev->hard_header_len = BATADV_HEADER_LEN;
 428
 429         /* generate random address */
 430         eth_hw_addr_random(dev);
 431
 432         SET_ETHTOOL_OPS(dev, &batadv_ethtool_ops);
 433
 434         memset(priv, 0, sizeof(*priv));
 435 }
 436
 437 struct net_device *batadv_softif_create(const char *name)
 438 {
 439         struct net_device *soft_iface;
 440         struct batadv_priv *bat_priv;
 441         int ret;
 442         size_t cnt_len = sizeof(uint64_t) * BATADV_CNT_NUM;
 443
 444         soft_iface = alloc_netdev(sizeof(*bat_priv), name,
 445                                   batadv_interface_setup);
 446
 447         if (!soft_iface)
 448                 goto out;
 449
 450         bat_priv = netdev_priv(soft_iface);
 451
 452         /* batadv_interface_stats() needs to be available as soon as
 453          * register_netdevice() has been called
 454          */
 455         bat_priv->bat_counters = __alloc_percpu(cnt_len, __alignof__(uint64_t));
 456         if (!bat_priv->bat_counters)
 457                 goto free_soft_iface;
 458
 459         ret = register_netdevice(soft_iface);
 460         if (ret < 0) {
 461                 pr_err("Unable to register the batman interface '%s': %i\n",
 462                        name, ret);
 463                 goto free_bat_counters;
 464         }
 465
 466         atomic_set(&bat_priv->aggregated_ogms, 1);
 467         atomic_set(&bat_priv->bonding, 0);
 468         atomic_set(&bat_priv->bridge_loop_avoidance, 0);
 469         atomic_set(&bat_priv->ap_isolation, 0);
 470         atomic_set(&bat_priv->vis_mode, BATADV_VIS_TYPE_CLIENT_UPDATE);
 471         atomic_set(&bat_priv->gw_mode, BATADV_GW_MODE_OFF);
 472         atomic_set(&bat_priv->gw_sel_class, 20);
 473         atomic_set(&bat_priv->gw_bandwidth, 41);
 474         atomic_set(&bat_priv->orig_interval, 1000);
 475         atomic_set(&bat_priv->hop_penalty, 30);
 476         atomic_set(&bat_priv->log_level, 0);
 477         atomic_set(&bat_priv->fragmentation, 1);
 478         atomic_set(&bat_priv->bcast_queue_left, BATADV_BCAST_QUEUE_LEN);
 479         atomic_set(&bat_priv->batman_queue_left, BATADV_BATMAN_QUEUE_LEN);
 480
 481         atomic_set(&bat_priv->mesh_state, BATADV_MESH_INACTIVE);
 482         atomic_set(&bat_priv->bcast_seqno, 1);
 483         atomic_set(&bat_priv->tt.vn, 0);
 484         atomic_set(&bat_priv->tt.local_changes, 0);
 485         atomic_set(&bat_priv->tt.ogm_append_cnt, 0);
 486 #ifdef CONFIG_BATMAN_ADV_BLA
 487         atomic_set(&bat_priv->bla.num_requests, 0);
 488 #endif
 489         bat_priv->tt.last_changeset = NULL;
 490         bat_priv->tt.last_changeset_len = 0;
 491         bat_priv->tt.poss_change = false;
 492
 493         bat_priv->primary_if = NULL;
 494         bat_priv->num_ifaces = 0;
 495
 496         ret = batadv_algo_select(bat_priv, batadv_routing_algo);
 497         if (ret < 0)
 498                 goto unreg_soft_iface;
 499
 500         ret = batadv_sysfs_add_meshif(soft_iface);
 501         if (ret < 0)
 502                 goto unreg_soft_iface;
 503
 504         ret = batadv_debugfs_add_meshif(soft_iface);
 505         if (ret < 0)
 506                 goto unreg_sysfs;
 507
 508         ret = batadv_mesh_init(soft_iface);
 509         if (ret < 0)
 510                 goto unreg_debugfs;
 511
 512         return soft_iface;
 513
 514 unreg_debugfs:
 515         batadv_debugfs_del_meshif(soft_iface);
 516 unreg_sysfs:
 517         batadv_sysfs_del_meshif(soft_iface);
 518 unreg_soft_iface:
 519         free_percpu(bat_priv->bat_counters);
 520         unregister_netdevice(soft_iface);
 521         return NULL;
 522
 523 free_bat_counters:
 524         free_percpu(bat_priv->bat_counters);
 525 free_soft_iface:
 526         free_netdev(soft_iface);
 527 out:
 528         return NULL;
 529 }
 530
 531 void batadv_softif_destroy(struct net_device *soft_iface)
 532 {
 533         batadv_debugfs_del_meshif(soft_iface);
 534         batadv_sysfs_del_meshif(soft_iface);
 535         batadv_mesh_free(soft_iface);
 536         unregister_netdevice(soft_iface);
 537 }
 538
 539 int batadv_softif_is_valid(const struct net_device *net_dev)
 540 {
 541         if (net_dev->netdev_ops->ndo_start_xmit == batadv_interface_tx)
 542                 return 1;
 543
 544         return 0;
 545 }
 546
 547 /* ethtool */
 548 static int batadv_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 549 {
 550         cmd->supported = 0;
 551         cmd->advertising = 0;
 552         ethtool_cmd_speed_set(cmd, SPEED_10);
 553         cmd->duplex = DUPLEX_FULL;
 554         cmd->port = PORT_TP;
 555         cmd->phy_address = 0;
 556         cmd->transceiver = XCVR_INTERNAL;
 557         cmd->autoneg = AUTONEG_DISABLE;
 558         cmd->maxtxpkt = 0;
 559         cmd->maxrxpkt = 0;
 560
 561         return 0;
 562 }
 563
 564 static void batadv_get_drvinfo(struct net_device *dev,
 565                                struct ethtool_drvinfo *info)
 566 {
 567         strcpy(info->driver, "B.A.T.M.A.N. advanced");
 568         strcpy(info->version, BATADV_SOURCE_VERSION);
 569         strcpy(info->fw_version, "N/A");
 570         strcpy(info->bus_info, "batman");
 571 }
 572
 573 static u32 batadv_get_msglevel(struct net_device *dev)
 574 {
 575         return -EOPNOTSUPP;
 576 }
 577
 578 static void batadv_set_msglevel(struct net_device *dev, u32 value)
 579 {
 580 }
 581
 582 static u32 batadv_get_link(struct net_device *dev)
 583 {
 584         return 1;
 585 }
 586
 587 /* Inspired by drivers/net/ethernet/dlink/sundance.c:1702
 588  * Declare each description string in struct.name[] to get fixed sized buffer
 589  * and compile time checking for strings longer than ETH_GSTRING_LEN.
 590  */
 591 static const struct {
 592         const char name[ETH_GSTRING_LEN];
 593 } batadv_counters_strings[] = {
 594         { "tx" },
 595         { "tx_bytes" },
 596         { "tx_dropped" },
 597         { "rx" },
 598         { "rx_bytes" },
 599         { "forward" },
 600         { "forward_bytes" },
 601         { "mgmt_tx" },
 602         { "mgmt_tx_bytes" },
 603         { "mgmt_rx" },
 604         { "mgmt_rx_bytes" },
 605         { "tt_request_tx" },
 606         { "tt_request_rx" },
 607         { "tt_response_tx" },
 608         { "tt_response_rx" },
 609         { "tt_roam_adv_tx" },
 610         { "tt_roam_adv_rx" },
 611 };
 612
 613 static void batadv_get_strings(struct net_device *dev, uint32_t stringset,
 614                                uint8_t *data)
 615 {
 616         if (stringset == ETH_SS_STATS)
 617                 memcpy(data, batadv_counters_strings,
 618                        sizeof(batadv_counters_strings));
 619 }
 620
 621 static void batadv_get_ethtool_stats(struct net_device *dev,
 622                                      struct ethtool_stats *stats,
 623                                      uint64_t *data)
 624 {
 625         struct batadv_priv *bat_priv = netdev_priv(dev);
 626         int i;
 627
 628         for (i = 0; i < BATADV_CNT_NUM; i++)
 629                 data[i] = batadv_sum_counter(bat_priv, i);
 630 }
 631
 632 static int batadv_get_sset_count(struct net_device *dev, int stringset)
 633 {
 634         if (stringset == ETH_SS_STATS)
 635                 return BATADV_CNT_NUM;
 636
 637         return -EOPNOTSUPP;
 638 }