net/batman-adv/soft-interface.c

   1 /*
   2  * Copyright (C) 2007-2011 B.A.T.M.A.N. contributors:
   3  *
   4  * Marek Lindner, Simon Wunderlich
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of version 2 of the GNU General Public
   8  * License as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  18  * 02110-1301, USA
  19  *
  20  */
  21
  22 #include "main.h"
  23 #include "soft-interface.h"
  24 #include "hard-interface.h"
  25 #include "routing.h"
  26 #include "send.h"
  27 #include "bat_debugfs.h"
  28 #include "translation-table.h"
  29 #include "hash.h"
  30 #include "gateway_common.h"
  31 #include "gateway_client.h"
  32 #include "bat_sysfs.h"
  33 #include <linux/slab.h>
  34 #include <linux/ethtool.h>
  35 #include <linux/etherdevice.h>
  36 #include <linux/if_vlan.h>
  37 #include "unicast.h"
  38
  39
  40 static int bat_get_settings(struct net_device *dev, struct ethtool_cmd *cmd);
  41 static void bat_get_drvinfo(struct net_device *dev,
  42                             struct ethtool_drvinfo *info);
  43 static u32 bat_get_msglevel(struct net_device *dev);
  44 static void bat_set_msglevel(struct net_device *dev, u32 value);
  45 static u32 bat_get_link(struct net_device *dev);
  46
  47 static const struct ethtool_ops bat_ethtool_ops = {
  48         .get_settings = bat_get_settings,
  49         .get_drvinfo = bat_get_drvinfo,
  50         .get_msglevel = bat_get_msglevel,
  51         .set_msglevel = bat_set_msglevel,
  52         .get_link = bat_get_link,
  53 };
  54
  55 int my_skb_head_push(struct sk_buff *skb, unsigned int len)
  56 {
  57         int result;
  58
  59         /**
  60          * TODO: We must check if we can release all references to non-payload
  61          * data using skb_header_release in our skbs to allow skb_cow_header to
  62          * work optimally. This means that those skbs are not allowed to read
  63          * or write any data which is before the current position of skb->data
  64          * after that call and thus allow other skbs with the same data buffer
  65          * to write freely in that area.
  66          */
  67         result = skb_cow_head(skb, len);
  68         if (result < 0)
  69                 return result;
  70
  71         skb_push(skb, len);
  72         return 0;
  73 }
  74
  75 static void softif_neigh_free_rcu(struct rcu_head *rcu)
  76 {
  77         struct softif_neigh *softif_neigh;
  78
  79         softif_neigh = container_of(rcu, struct softif_neigh, rcu);
  80         kfree(softif_neigh);
  81 }
  82
  83 static void softif_neigh_free_ref(struct softif_neigh *softif_neigh)
  84 {
  85         if (atomic_dec_and_test(&softif_neigh->refcount))
  86                 call_rcu(&softif_neigh->rcu, softif_neigh_free_rcu);
  87 }
  88
  89 static struct softif_neigh *softif_neigh_get_selected(struct bat_priv *bat_priv)
  90 {
  91         struct softif_neigh *neigh;
  92
  93         rcu_read_lock();
  94         neigh = rcu_dereference(bat_priv->softif_neigh);
  95
  96         if (neigh && !atomic_inc_not_zero(&neigh->refcount))
  97                 neigh = NULL;
  98
  99         rcu_read_unlock();
 100         return neigh;
 101 }
 102
 103 static void softif_neigh_select(struct bat_priv *bat_priv,
 104                                 struct softif_neigh *new_neigh)
 105 {
 106         struct softif_neigh *curr_neigh;
 107
 108         spin_lock_bh(&bat_priv->softif_neigh_lock);
 109
 110         if (new_neigh && !atomic_inc_not_zero(&new_neigh->refcount))
 111                 new_neigh = NULL;
 112
 113         curr_neigh = bat_priv->softif_neigh;
 114         rcu_assign_pointer(bat_priv->softif_neigh, new_neigh);
 115
 116         if (curr_neigh)
 117                 softif_neigh_free_ref(curr_neigh);
 118
 119         spin_unlock_bh(&bat_priv->softif_neigh_lock);
 120 }
 121
 122 static void softif_neigh_deselect(struct bat_priv *bat_priv)
 123 {
 124         softif_neigh_select(bat_priv, NULL);
 125 }
 126
 127 void softif_neigh_purge(struct bat_priv *bat_priv)
 128 {
 129         struct softif_neigh *softif_neigh, *curr_softif_neigh;
 130         struct hlist_node *node, *node_tmp;
 131         char do_deselect = 0;
 132
 133         curr_softif_neigh = softif_neigh_get_selected(bat_priv);
 134
 135         spin_lock_bh(&bat_priv->softif_neigh_lock);
 136
 137         hlist_for_each_entry_safe(softif_neigh, node, node_tmp,
 138                                   &bat_priv->softif_neigh_list, list) {
 139
 140                 if ((!time_after(jiffies, softif_neigh->last_seen +
 141                                 msecs_to_jiffies(SOFTIF_NEIGH_TIMEOUT))) &&
 142                     (atomic_read(&bat_priv->mesh_state) == MESH_ACTIVE))
 143                         continue;
 144
 145                 if (curr_softif_neigh == softif_neigh) {
 146                         bat_dbg(DBG_ROUTES, bat_priv,
 147                                  "Current mesh exit point '%pM' vanished "
 148                                  "(vid: %d).\n",
 149                                  softif_neigh->addr, softif_neigh->vid);
 150                         do_deselect = 1;
 151                 }
 152
 153                 hlist_del_rcu(&softif_neigh->list);
 154                 softif_neigh_free_ref(softif_neigh);
 155         }
 156
 157         spin_unlock_bh(&bat_priv->softif_neigh_lock);
 158
 159         /* soft_neigh_deselect() needs to acquire the softif_neigh_lock */
 160         if (do_deselect)
 161                 softif_neigh_deselect(bat_priv);
 162
 163         if (curr_softif_neigh)
 164                 softif_neigh_free_ref(curr_softif_neigh);
 165 }
 166
 167 static struct softif_neigh *softif_neigh_get(struct bat_priv *bat_priv,
 168                                              uint8_t *addr, short vid)
 169 {
 170         struct softif_neigh *softif_neigh;
 171         struct hlist_node *node;
 172
 173         rcu_read_lock();
 174         hlist_for_each_entry_rcu(softif_neigh, node,
 175                                  &bat_priv->softif_neigh_list, list) {
 176                 if (!compare_eth(softif_neigh->addr, addr))
 177                         continue;
 178
 179                 if (softif_neigh->vid != vid)
 180                         continue;
 181
 182                 if (!atomic_inc_not_zero(&softif_neigh->refcount))
 183                         continue;
 184
 185                 softif_neigh->last_seen = jiffies;
 186                 goto out;
 187         }
 188
 189         softif_neigh = kzalloc(sizeof(struct softif_neigh), GFP_ATOMIC);
 190         if (!softif_neigh)
 191                 goto out;
 192
 193         memcpy(softif_neigh->addr, addr, ETH_ALEN);
 194         softif_neigh->vid = vid;
 195         softif_neigh->last_seen = jiffies;
 196         /* initialize with 2 - caller decrements counter by one */
 197         atomic_set(&softif_neigh->refcount, 2);
 198
 199         INIT_HLIST_NODE(&softif_neigh->list);
 200         spin_lock_bh(&bat_priv->softif_neigh_lock);
 201         hlist_add_head_rcu(&softif_neigh->list, &bat_priv->softif_neigh_list);
 202         spin_unlock_bh(&bat_priv->softif_neigh_lock);
 203
 204 out:
 205         rcu_read_unlock();
 206         return softif_neigh;
 207 }
 208
 209 int softif_neigh_seq_print_text(struct seq_file *seq, void *offset)
 210 {
 211         struct net_device *net_dev = (struct net_device *)seq->private;
 212         struct bat_priv *bat_priv = netdev_priv(net_dev);
 213         struct softif_neigh *softif_neigh;
 214         struct hlist_node *node;
 215         struct softif_neigh *curr_softif_neigh;
 216
 217         if (!bat_priv->primary_if) {
 218                 return seq_printf(seq, "BATMAN mesh %s disabled - "
 219                                "please specify interfaces to enable it\n",
 220                                net_dev->name);
 221         }
 222
 223         seq_printf(seq, "Softif neighbor list (%s)\n", net_dev->name);
 224
 225         curr_softif_neigh = softif_neigh_get_selected(bat_priv);
 226         rcu_read_lock();
 227         hlist_for_each_entry_rcu(softif_neigh, node,
 228                                  &bat_priv->softif_neigh_list, list)
 229                 seq_printf(seq, "%s %pM (vid: %d)\n",
 230                                 curr_softif_neigh == softif_neigh
 231                                 ? "=>" : "  ", softif_neigh->addr,
 232                                 softif_neigh->vid);
 233         rcu_read_unlock();
 234         if (curr_softif_neigh)
 235                 softif_neigh_free_ref(curr_softif_neigh);
 236
 237         return 0;
 238 }
 239
 240 static void softif_batman_recv(struct sk_buff *skb, struct net_device *dev,
 241                                short vid)
 242 {
 243         struct bat_priv *bat_priv = netdev_priv(dev);
 244         struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
 245         struct batman_packet *batman_packet;
 246         struct softif_neigh *softif_neigh;
 247         struct softif_neigh *curr_softif_neigh = NULL;
 248
 249         if (ntohs(ethhdr->h_proto) == ETH_P_8021Q)
 250                 batman_packet = (struct batman_packet *)
 251                                         (skb->data + ETH_HLEN + VLAN_HLEN);
 252         else
 253                 batman_packet = (struct batman_packet *)(skb->data + ETH_HLEN);
 254
 255         if (batman_packet->version != COMPAT_VERSION)
 256                 goto err;
 257
 258         if (batman_packet->packet_type != BAT_PACKET)
 259                 goto err;
 260
 261         if (!(batman_packet->flags & PRIMARIES_FIRST_HOP))
 262                 goto err;
 263
 264         if (is_my_mac(batman_packet->orig))
 265                 goto err;
 266
 267         softif_neigh = softif_neigh_get(bat_priv, batman_packet->orig, vid);
 268
 269         if (!softif_neigh)
 270                 goto err;
 271
 272         curr_softif_neigh = softif_neigh_get_selected(bat_priv);
 273         if (curr_softif_neigh == softif_neigh)
 274                 goto out;
 275
 276         /* we got a neighbor but its mac is 'bigger' than ours  */
 277         if (memcmp(bat_priv->primary_if->net_dev->dev_addr,
 278                    softif_neigh->addr, ETH_ALEN) < 0)
 279                 goto out;
 280
 281         /* switch to new 'smallest neighbor' */
 282         if ((curr_softif_neigh) &&
 283             (memcmp(softif_neigh->addr, curr_softif_neigh->addr,
 284                                                         ETH_ALEN) < 0)) {
 285                 bat_dbg(DBG_ROUTES, bat_priv,
 286                         "Changing mesh exit point from %pM (vid: %d) "
 287                         "to %pM (vid: %d).\n",
 288                          curr_softif_neigh->addr,
 289                          curr_softif_neigh->vid,
 290                          softif_neigh->addr, softif_neigh->vid);
 291
 292                 softif_neigh_select(bat_priv, softif_neigh);
 293                 goto out;
 294         }
 295
 296         /* close own batX device and use softif_neigh as exit node */
 297         if ((!curr_softif_neigh) &&
 298             (memcmp(softif_neigh->addr,
 299                     bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN) < 0)) {
 300                 bat_dbg(DBG_ROUTES, bat_priv,
 301                         "Setting mesh exit point to %pM (vid: %d).\n",
 302                         softif_neigh->addr, softif_neigh->vid);
 303
 304                 softif_neigh_select(bat_priv, softif_neigh);
 305                 goto out;
 306         }
 307
 308 out:
 309         softif_neigh_free_ref(softif_neigh);
 310 err:
 311         kfree_skb(skb);
 312         if (curr_softif_neigh)
 313                 softif_neigh_free_ref(curr_softif_neigh);
 314
 315         return;
 316 }
 317
 318 static int interface_open(struct net_device *dev)
 319 {
 320         netif_start_queue(dev);
 321         return 0;
 322 }
 323
 324 static int interface_release(struct net_device *dev)
 325 {
 326         netif_stop_queue(dev);
 327         return 0;
 328 }
 329
 330 static struct net_device_stats *interface_stats(struct net_device *dev)
 331 {
 332         struct bat_priv *bat_priv = netdev_priv(dev);
 333         return &bat_priv->stats;
 334 }
 335
 336 static int interface_set_mac_addr(struct net_device *dev, void *p)
 337 {
 338         struct bat_priv *bat_priv = netdev_priv(dev);
 339         struct sockaddr *addr = p;
 340
 341         if (!is_valid_ether_addr(addr->sa_data))
 342                 return -EADDRNOTAVAIL;
 343
 344         /* only modify hna-table if it has been initialised before */
 345         if (atomic_read(&bat_priv->mesh_state) == MESH_ACTIVE) {
 346                 hna_local_remove(bat_priv, dev->dev_addr,
 347                                  "mac address changed");
 348                 hna_local_add(dev, addr->sa_data);
 349         }
 350
 351         memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
 352         return 0;
 353 }
 354
 355 static int interface_change_mtu(struct net_device *dev, int new_mtu)
 356 {
 357         /* check ranges */
 358         if ((new_mtu < 68) || (new_mtu > hardif_min_mtu(dev)))
 359                 return -EINVAL;
 360
 361         dev->mtu = new_mtu;
 362
 363         return 0;
 364 }
 365
 366 int interface_tx(struct sk_buff *skb, struct net_device *soft_iface)
 367 {
 368         struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
 369         struct bat_priv *bat_priv = netdev_priv(soft_iface);
 370         struct bcast_packet *bcast_packet;
 371         struct vlan_ethhdr *vhdr;
 372         struct softif_neigh *curr_softif_neigh = NULL;
 373         int data_len = skb->len, ret;
 374         short vid = -1;
 375         bool do_bcast = false;
 376
 377         if (atomic_read(&bat_priv->mesh_state) != MESH_ACTIVE)
 378                 goto dropped;
 379
 380         soft_iface->trans_start = jiffies;
 381
 382         switch (ntohs(ethhdr->h_proto)) {
 383         case ETH_P_8021Q:
 384                 vhdr = (struct vlan_ethhdr *)skb->data;
 385                 vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK;
 386
 387                 if (ntohs(vhdr->h_vlan_encapsulated_proto) != ETH_P_BATMAN)
 388                         break;
 389
 390                 /* fall through */
 391         case ETH_P_BATMAN:
 392                 softif_batman_recv(skb, soft_iface, vid);
 393                 goto end;
 394         }
 395
 396         /**
 397          * if we have a another chosen mesh exit node in range
 398          * it will transport the packets to the mesh
 399          */
 400         curr_softif_neigh = softif_neigh_get_selected(bat_priv);
 401         if ((curr_softif_neigh) && (curr_softif_neigh->vid == vid))
 402                 goto dropped;
 403
 404         /* TODO: check this for locks */
 405         hna_local_add(soft_iface, ethhdr->h_source);
 406
 407         if (is_multicast_ether_addr(ethhdr->h_dest)) {
 408                 ret = gw_is_target(bat_priv, skb);
 409
 410                 if (ret < 0)
 411                         goto dropped;
 412
 413                 if (ret == 0)
 414                         do_bcast = true;
 415         }
 416
 417         /* ethernet packet should be broadcasted */
 418         if (do_bcast) {
 419                 if (!bat_priv->primary_if)
 420                         goto dropped;
 421
 422                 if (my_skb_head_push(skb, sizeof(struct bcast_packet)) < 0)
 423                         goto dropped;
 424
 425                 bcast_packet = (struct bcast_packet *)skb->data;
 426                 bcast_packet->version = COMPAT_VERSION;
 427                 bcast_packet->ttl = TTL;
 428
 429                 /* batman packet type: broadcast */
 430                 bcast_packet->packet_type = BAT_BCAST;
 431
 432                 /* hw address of first interface is the orig mac because only
 433                  * this mac is known throughout the mesh */
 434                 memcpy(bcast_packet->orig,
 435                        bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN);
 436
 437                 /* set broadcast sequence number */
 438                 bcast_packet->seqno =
 439                         htonl(atomic_inc_return(&bat_priv->bcast_seqno));
 440
 441                 add_bcast_packet_to_list(bat_priv, skb);
 442
 443                 /* a copy is stored in the bcast list, therefore removing
 444                  * the original skb. */
 445                 kfree_skb(skb);
 446
 447         /* unicast packet */
 448         } else {
 449                 ret = unicast_send_skb(skb, bat_priv);
 450                 if (ret != 0)
 451                         goto dropped_freed;
 452         }
 453
 454         bat_priv->stats.tx_packets++;
 455         bat_priv->stats.tx_bytes += data_len;
 456         goto end;
 457
 458 dropped:
 459         kfree_skb(skb);
 460 dropped_freed:
 461         bat_priv->stats.tx_dropped++;
 462 end:
 463         if (curr_softif_neigh)
 464                 softif_neigh_free_ref(curr_softif_neigh);
 465         return NETDEV_TX_OK;
 466 }
 467
 468 void interface_rx(struct net_device *soft_iface,
 469                   struct sk_buff *skb, struct hard_iface *recv_if,
 470                   int hdr_size)
 471 {
 472         struct bat_priv *bat_priv = netdev_priv(soft_iface);
 473         struct unicast_packet *unicast_packet;
 474         struct ethhdr *ethhdr;
 475         struct vlan_ethhdr *vhdr;
 476         struct softif_neigh *curr_softif_neigh = NULL;
 477         short vid = -1;
 478         int ret;
 479
 480         /* check if enough space is available for pulling, and pull */
 481         if (!pskb_may_pull(skb, hdr_size))
 482                 goto dropped;
 483
 484         skb_pull_rcsum(skb, hdr_size);
 485         skb_reset_mac_header(skb);
 486
 487         ethhdr = (struct ethhdr *)skb_mac_header(skb);
 488
 489         switch (ntohs(ethhdr->h_proto)) {
 490         case ETH_P_8021Q:
 491                 vhdr = (struct vlan_ethhdr *)skb->data;
 492                 vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK;
 493
 494                 if (ntohs(vhdr->h_vlan_encapsulated_proto) != ETH_P_BATMAN)
 495                         break;
 496
 497                 /* fall through */
 498         case ETH_P_BATMAN:
 499                 goto dropped;
 500         }
 501
 502         /**
 503          * if we have a another chosen mesh exit node in range
 504          * it will transport the packets to the non-mesh network
 505          */
 506         curr_softif_neigh = softif_neigh_get_selected(bat_priv);
 507         if (curr_softif_neigh && (curr_softif_neigh->vid == vid)) {
 508                 skb_push(skb, hdr_size);
 509                 unicast_packet = (struct unicast_packet *)skb->data;
 510
 511                 if ((unicast_packet->packet_type != BAT_UNICAST) &&
 512                     (unicast_packet->packet_type != BAT_UNICAST_FRAG))
 513                         goto dropped;
 514
 515                 skb_reset_mac_header(skb);
 516
 517                 memcpy(unicast_packet->dest,
 518                        curr_softif_neigh->addr, ETH_ALEN);
 519                 ret = route_unicast_packet(skb, recv_if);
 520                 if (ret == NET_RX_DROP)
 521                         goto dropped;
 522
 523                 goto out;
 524         }
 525
 526         /* skb->dev & skb->pkt_type are set here */
 527         if (unlikely(!pskb_may_pull(skb, ETH_HLEN)))
 528                 goto dropped;
 529         skb->protocol = eth_type_trans(skb, soft_iface);
 530
 531         /* should not be necessary anymore as we use skb_pull_rcsum()
 532          * TODO: please verify this and remove this TODO
 533          * -- Dec 21st 2009, Simon Wunderlich */
 534
 535 /*      skb->ip_summed = CHECKSUM_UNNECESSARY;*/
 536
 537         bat_priv->stats.rx_packets++;
 538         bat_priv->stats.rx_bytes += skb->len + sizeof(struct ethhdr);
 539
 540         soft_iface->last_rx = jiffies;
 541
 542         netif_rx(skb);
 543         goto out;
 544
 545 dropped:
 546         kfree_skb(skb);
 547 out:
 548         if (curr_softif_neigh)
 549                 softif_neigh_free_ref(curr_softif_neigh);
 550         return;
 551 }
 552
 553 #ifdef HAVE_NET_DEVICE_OPS
 554 static const struct net_device_ops bat_netdev_ops = {
 555         .ndo_open = interface_open,
 556         .ndo_stop = interface_release,
 557         .ndo_get_stats = interface_stats,
 558         .ndo_set_mac_address = interface_set_mac_addr,
 559         .ndo_change_mtu = interface_change_mtu,
 560         .ndo_start_xmit = interface_tx,
 561         .ndo_validate_addr = eth_validate_addr
 562 };
 563 #endif
 564
 565 static void interface_setup(struct net_device *dev)
 566 {
 567         struct bat_priv *priv = netdev_priv(dev);
 568         char dev_addr[ETH_ALEN];
 569
 570         ether_setup(dev);
 571
 572 #ifdef HAVE_NET_DEVICE_OPS
 573         dev->netdev_ops = &bat_netdev_ops;
 574 #else
 575         dev->open = interface_open;
 576         dev->stop = interface_release;
 577         dev->get_stats = interface_stats;
 578         dev->set_mac_address = interface_set_mac_addr;
 579         dev->change_mtu = interface_change_mtu;
 580         dev->hard_start_xmit = interface_tx;
 581 #endif
 582         dev->destructor = free_netdev;
 583         dev->tx_queue_len = 0;
 584
 585         /**
 586          * can't call min_mtu, because the needed variables
 587          * have not been initialized yet
 588          */
 589         dev->mtu = ETH_DATA_LEN;
 590         dev->hard_header_len = BAT_HEADER_LEN; /* reserve more space in the
 591                                                 * skbuff for our header */
 592
 593         /* generate random address */
 594         random_ether_addr(dev_addr);
 595         memcpy(dev->dev_addr, dev_addr, ETH_ALEN);
 596
 597         SET_ETHTOOL_OPS(dev, &bat_ethtool_ops);
 598
 599         memset(priv, 0, sizeof(struct bat_priv));
 600 }
 601
 602 struct net_device *softif_create(char *name)
 603 {
 604         struct net_device *soft_iface;
 605         struct bat_priv *bat_priv;
 606         int ret;
 607
 608         soft_iface = alloc_netdev(sizeof(struct bat_priv) , name,
 609                                    interface_setup);
 610
 611         if (!soft_iface) {
 612                 pr_err("Unable to allocate the batman interface: %s\n", name);
 613                 goto out;
 614         }
 615
 616         ret = register_netdev(soft_iface);
 617         if (ret < 0) {
 618                 pr_err("Unable to register the batman interface '%s': %i\n",
 619                        name, ret);
 620                 goto free_soft_iface;
 621         }
 622
 623         bat_priv = netdev_priv(soft_iface);
 624
 625         atomic_set(&bat_priv->aggregated_ogms, 1);
 626         atomic_set(&bat_priv->bonding, 0);
 627         atomic_set(&bat_priv->vis_mode, VIS_TYPE_CLIENT_UPDATE);
 628         atomic_set(&bat_priv->gw_mode, GW_MODE_OFF);
 629         atomic_set(&bat_priv->gw_sel_class, 20);
 630         atomic_set(&bat_priv->gw_bandwidth, 41);
 631         atomic_set(&bat_priv->orig_interval, 1000);
 632         atomic_set(&bat_priv->hop_penalty, 10);
 633         atomic_set(&bat_priv->log_level, 0);
 634         atomic_set(&bat_priv->fragmentation, 1);
 635         atomic_set(&bat_priv->bcast_queue_left, BCAST_QUEUE_LEN);
 636         atomic_set(&bat_priv->batman_queue_left, BATMAN_QUEUE_LEN);
 637
 638         atomic_set(&bat_priv->mesh_state, MESH_INACTIVE);
 639         atomic_set(&bat_priv->bcast_seqno, 1);
 640         atomic_set(&bat_priv->hna_local_changed, 0);
 641
 642         bat_priv->primary_if = NULL;
 643         bat_priv->num_ifaces = 0;
 644         bat_priv->softif_neigh = NULL;
 645
 646         ret = sysfs_add_meshif(soft_iface);
 647         if (ret < 0)
 648                 goto unreg_soft_iface;
 649
 650         ret = debugfs_add_meshif(soft_iface);
 651         if (ret < 0)
 652                 goto unreg_sysfs;
 653
 654         ret = mesh_init(soft_iface);
 655         if (ret < 0)
 656                 goto unreg_debugfs;
 657
 658         return soft_iface;
 659
 660 unreg_debugfs:
 661         debugfs_del_meshif(soft_iface);
 662 unreg_sysfs:
 663         sysfs_del_meshif(soft_iface);
 664 unreg_soft_iface:
 665         unregister_netdev(soft_iface);
 666         return NULL;
 667
 668 free_soft_iface:
 669         free_netdev(soft_iface);
 670 out:
 671         return NULL;
 672 }
 673
 674 void softif_destroy(struct net_device *soft_iface)
 675 {
 676         debugfs_del_meshif(soft_iface);
 677         sysfs_del_meshif(soft_iface);
 678         mesh_free(soft_iface);
 679         unregister_netdevice(soft_iface);
 680 }
 681
 682 int softif_is_valid(struct net_device *net_dev)
 683 {
 684 #ifdef HAVE_NET_DEVICE_OPS
 685         if (net_dev->netdev_ops->ndo_start_xmit == interface_tx)
 686                 return 1;
 687 #else
 688         if (net_dev->hard_start_xmit == interface_tx)
 689                 return 1;
 690 #endif
 691
 692         return 0;
 693 }
 694
 695 /* ethtool */
 696 static int bat_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 697 {
 698         cmd->supported = 0;
 699         cmd->advertising = 0;
 700         cmd->speed = SPEED_10;
 701         cmd->duplex = DUPLEX_FULL;
 702         cmd->port = PORT_TP;
 703         cmd->phy_address = 0;
 704         cmd->transceiver = XCVR_INTERNAL;
 705         cmd->autoneg = AUTONEG_DISABLE;
 706         cmd->maxtxpkt = 0;
 707         cmd->maxrxpkt = 0;
 708
 709         return 0;
 710 }
 711
 712 static void bat_get_drvinfo(struct net_device *dev,
 713                             struct ethtool_drvinfo *info)
 714 {
 715         strcpy(info->driver, "B.A.T.M.A.N. advanced");
 716         strcpy(info->version, SOURCE_VERSION);
 717         strcpy(info->fw_version, "N/A");
 718         strcpy(info->bus_info, "batman");
 719 }
 720
 721 static u32 bat_get_msglevel(struct net_device *dev)
 722 {
 723         return -EOPNOTSUPP;
 724 }
 725
 726 static void bat_set_msglevel(struct net_device *dev, u32 value)
 727 {
 728 }
 729
 730 static u32 bat_get_link(struct net_device *dev)
 731 {
 732         return 1;
 733 }
 734