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 static u32 bat_get_rx_csum(struct net_device *dev);
  47 static int bat_set_rx_csum(struct net_device *dev, u32 data);
  48
  49 static const struct ethtool_ops bat_ethtool_ops = {
  50         .get_settings = bat_get_settings,
  51         .get_drvinfo = bat_get_drvinfo,
  52         .get_msglevel = bat_get_msglevel,
  53         .set_msglevel = bat_set_msglevel,
  54         .get_link = bat_get_link,
  55         .get_rx_csum = bat_get_rx_csum,
  56         .set_rx_csum = bat_set_rx_csum
  57 };
  58
  59 int my_skb_head_push(struct sk_buff *skb, unsigned int len)
  60 {
  61         int result;
  62
  63         /**
  64          * TODO: We must check if we can release all references to non-payload
  65          * data using skb_header_release in our skbs to allow skb_cow_header to
  66          * work optimally. This means that those skbs are not allowed to read
  67          * or write any data which is before the current position of skb->data
  68          * after that call and thus allow other skbs with the same data buffer
  69          * to write freely in that area.
  70          */
  71         result = skb_cow_head(skb, len);
  72         if (result < 0)
  73                 return result;
  74
  75         skb_push(skb, len);
  76         return 0;
  77 }
  78
  79 static void softif_neigh_free_rcu(struct rcu_head *rcu)
  80 {
  81         struct softif_neigh *softif_neigh;
  82
  83         softif_neigh = container_of(rcu, struct softif_neigh, rcu);
  84         kfree(softif_neigh);
  85 }
  86
  87 static void softif_neigh_free_ref(struct softif_neigh *softif_neigh)
  88 {
  89         if (atomic_dec_and_test(&softif_neigh->refcount))
  90                 call_rcu(&softif_neigh->rcu, softif_neigh_free_rcu);
  91 }
  92
  93 static struct softif_neigh *softif_neigh_get_selected(struct bat_priv *bat_priv)
  94 {
  95         struct softif_neigh *neigh;
  96
  97         rcu_read_lock();
  98         neigh = rcu_dereference(bat_priv->softif_neigh);
  99
 100         if (neigh && !atomic_inc_not_zero(&neigh->refcount))
 101                 neigh = NULL;
 102
 103         rcu_read_unlock();
 104         return neigh;
 105 }
 106
 107 static void softif_neigh_select(struct bat_priv *bat_priv,
 108                                 struct softif_neigh *new_neigh)
 109 {
 110         struct softif_neigh *curr_neigh;
 111
 112         spin_lock_bh(&bat_priv->softif_neigh_lock);
 113
 114         if (new_neigh && !atomic_inc_not_zero(&new_neigh->refcount))
 115                 new_neigh = NULL;
 116
 117         curr_neigh = bat_priv->softif_neigh;
 118         rcu_assign_pointer(bat_priv->softif_neigh, new_neigh);
 119
 120         if (curr_neigh)
 121                 softif_neigh_free_ref(curr_neigh);
 122
 123         spin_unlock_bh(&bat_priv->softif_neigh_lock);
 124 }
 125
 126 static void softif_neigh_deselect(struct bat_priv *bat_priv)
 127 {
 128         softif_neigh_select(bat_priv, NULL);
 129 }
 130
 131 void softif_neigh_purge(struct bat_priv *bat_priv)
 132 {
 133         struct softif_neigh *softif_neigh, *curr_softif_neigh;
 134         struct hlist_node *node, *node_tmp;
 135         char do_deselect = 0;
 136
 137         curr_softif_neigh = softif_neigh_get_selected(bat_priv);
 138
 139         spin_lock_bh(&bat_priv->softif_neigh_lock);
 140
 141         hlist_for_each_entry_safe(softif_neigh, node, node_tmp,
 142                                   &bat_priv->softif_neigh_list, list) {
 143
 144                 if ((!time_after(jiffies, softif_neigh->last_seen +
 145                                 msecs_to_jiffies(SOFTIF_NEIGH_TIMEOUT))) &&
 146                     (atomic_read(&bat_priv->mesh_state) == MESH_ACTIVE))
 147                         continue;
 148
 149                 if (curr_softif_neigh == softif_neigh) {
 150                         bat_dbg(DBG_ROUTES, bat_priv,
 151                                  "Current mesh exit point '%pM' vanished "
 152                                  "(vid: %d).\n",
 153                                  softif_neigh->addr, softif_neigh->vid);
 154                         do_deselect = 1;
 155                 }
 156
 157                 hlist_del_rcu(&softif_neigh->list);
 158                 softif_neigh_free_ref(softif_neigh);
 159         }
 160
 161         spin_unlock_bh(&bat_priv->softif_neigh_lock);
 162
 163         /* soft_neigh_deselect() needs to acquire the softif_neigh_lock */
 164         if (do_deselect)
 165                 softif_neigh_deselect(bat_priv);
 166
 167         if (curr_softif_neigh)
 168                 softif_neigh_free_ref(curr_softif_neigh);
 169 }
 170
 171 static struct softif_neigh *softif_neigh_get(struct bat_priv *bat_priv,
 172                                              uint8_t *addr, short vid)
 173 {
 174         struct softif_neigh *softif_neigh;
 175         struct hlist_node *node;
 176
 177         rcu_read_lock();
 178         hlist_for_each_entry_rcu(softif_neigh, node,
 179                                  &bat_priv->softif_neigh_list, list) {
 180                 if (!compare_eth(softif_neigh->addr, addr))
 181                         continue;
 182
 183                 if (softif_neigh->vid != vid)
 184                         continue;
 185
 186                 if (!atomic_inc_not_zero(&softif_neigh->refcount))
 187                         continue;
 188
 189                 softif_neigh->last_seen = jiffies;
 190                 goto out;
 191         }
 192
 193         softif_neigh = kzalloc(sizeof(struct softif_neigh), GFP_ATOMIC);
 194         if (!softif_neigh)
 195                 goto out;
 196
 197         memcpy(softif_neigh->addr, addr, ETH_ALEN);
 198         softif_neigh->vid = vid;
 199         softif_neigh->last_seen = jiffies;
 200         /* initialize with 2 - caller decrements counter by one */
 201         atomic_set(&softif_neigh->refcount, 2);
 202
 203         INIT_HLIST_NODE(&softif_neigh->list);
 204         spin_lock_bh(&bat_priv->softif_neigh_lock);
 205         hlist_add_head_rcu(&softif_neigh->list, &bat_priv->softif_neigh_list);
 206         spin_unlock_bh(&bat_priv->softif_neigh_lock);
 207
 208 out:
 209         rcu_read_unlock();
 210         return softif_neigh;
 211 }
 212
 213 int softif_neigh_seq_print_text(struct seq_file *seq, void *offset)
 214 {
 215         struct net_device *net_dev = (struct net_device *)seq->private;
 216         struct bat_priv *bat_priv = netdev_priv(net_dev);
 217         struct softif_neigh *softif_neigh;
 218         struct hlist_node *node;
 219         struct softif_neigh *curr_softif_neigh;
 220
 221         if (!bat_priv->primary_if) {
 222                 return seq_printf(seq, "BATMAN mesh %s disabled - "
 223                                "please specify interfaces to enable it\n",
 224                                net_dev->name);
 225         }
 226
 227         seq_printf(seq, "Softif neighbor list (%s)\n", net_dev->name);
 228
 229         curr_softif_neigh = softif_neigh_get_selected(bat_priv);
 230         rcu_read_lock();
 231         hlist_for_each_entry_rcu(softif_neigh, node,
 232                                  &bat_priv->softif_neigh_list, list)
 233                 seq_printf(seq, "%s %pM (vid: %d)\n",
 234                                 curr_softif_neigh == softif_neigh
 235                                 ? "=>" : "  ", softif_neigh->addr,
 236                                 softif_neigh->vid);
 237         rcu_read_unlock();
 238         if (curr_softif_neigh)
 239                 softif_neigh_free_ref(curr_softif_neigh);
 240
 241         return 0;
 242 }
 243
 244 static void softif_batman_recv(struct sk_buff *skb, struct net_device *dev,
 245                                short vid)
 246 {
 247         struct bat_priv *bat_priv = netdev_priv(dev);
 248         struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
 249         struct batman_packet *batman_packet;
 250         struct softif_neigh *softif_neigh;
 251         struct softif_neigh *curr_softif_neigh = NULL;
 252
 253         if (ntohs(ethhdr->h_proto) == ETH_P_8021Q)
 254                 batman_packet = (struct batman_packet *)
 255                                         (skb->data + ETH_HLEN + VLAN_HLEN);
 256         else
 257                 batman_packet = (struct batman_packet *)(skb->data + ETH_HLEN);
 258
 259         if (batman_packet->version != COMPAT_VERSION)
 260                 goto err;
 261
 262         if (batman_packet->packet_type != BAT_PACKET)
 263                 goto err;
 264
 265         if (!(batman_packet->flags & PRIMARIES_FIRST_HOP))
 266                 goto err;
 267
 268         if (is_my_mac(batman_packet->orig))
 269                 goto err;
 270
 271         softif_neigh = softif_neigh_get(bat_priv, batman_packet->orig, vid);
 272
 273         if (!softif_neigh)
 274                 goto err;
 275
 276         curr_softif_neigh = softif_neigh_get_selected(bat_priv);
 277         if (curr_softif_neigh == softif_neigh)
 278                 goto out;
 279
 280         /* we got a neighbor but its mac is 'bigger' than ours  */
 281         if (memcmp(bat_priv->primary_if->net_dev->dev_addr,
 282                    softif_neigh->addr, ETH_ALEN) < 0)
 283                 goto out;
 284
 285         /* switch to new 'smallest neighbor' */
 286         if ((curr_softif_neigh) &&
 287             (memcmp(softif_neigh->addr, curr_softif_neigh->addr,
 288                                                         ETH_ALEN) < 0)) {
 289                 bat_dbg(DBG_ROUTES, bat_priv,
 290                         "Changing mesh exit point from %pM (vid: %d) "
 291                         "to %pM (vid: %d).\n",
 292                          curr_softif_neigh->addr,
 293                          curr_softif_neigh->vid,
 294                          softif_neigh->addr, softif_neigh->vid);
 295
 296                 softif_neigh_select(bat_priv, softif_neigh);
 297                 goto out;
 298         }
 299
 300         /* close own batX device and use softif_neigh as exit node */
 301         if ((!curr_softif_neigh) &&
 302             (memcmp(softif_neigh->addr,
 303                     bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN) < 0)) {
 304                 bat_dbg(DBG_ROUTES, bat_priv,
 305                         "Setting mesh exit point to %pM (vid: %d).\n",
 306                         softif_neigh->addr, softif_neigh->vid);
 307
 308                 softif_neigh_select(bat_priv, softif_neigh);
 309                 goto out;
 310         }
 311
 312 out:
 313         softif_neigh_free_ref(softif_neigh);
 314 err:
 315         kfree_skb(skb);
 316         if (curr_softif_neigh)
 317                 softif_neigh_free_ref(curr_softif_neigh);
 318
 319         return;
 320 }
 321
 322 static int interface_open(struct net_device *dev)
 323 {
 324         netif_start_queue(dev);
 325         return 0;
 326 }
 327
 328 static int interface_release(struct net_device *dev)
 329 {
 330         netif_stop_queue(dev);
 331         return 0;
 332 }
 333
 334 static struct net_device_stats *interface_stats(struct net_device *dev)
 335 {
 336         struct bat_priv *bat_priv = netdev_priv(dev);
 337         return &bat_priv->stats;
 338 }
 339
 340 static int interface_set_mac_addr(struct net_device *dev, void *p)
 341 {
 342         struct bat_priv *bat_priv = netdev_priv(dev);
 343         struct sockaddr *addr = p;
 344
 345         if (!is_valid_ether_addr(addr->sa_data))
 346                 return -EADDRNOTAVAIL;
 347
 348         /* only modify hna-table if it has been initialised before */
 349         if (atomic_read(&bat_priv->mesh_state) == MESH_ACTIVE) {
 350                 hna_local_remove(bat_priv, dev->dev_addr,
 351                                  "mac address changed");
 352                 hna_local_add(dev, addr->sa_data);
 353         }
 354
 355         memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
 356         return 0;
 357 }
 358
 359 static int interface_change_mtu(struct net_device *dev, int new_mtu)
 360 {
 361         /* check ranges */
 362         if ((new_mtu < 68) || (new_mtu > hardif_min_mtu(dev)))
 363                 return -EINVAL;
 364
 365         dev->mtu = new_mtu;
 366
 367         return 0;
 368 }
 369
 370 int interface_tx(struct sk_buff *skb, struct net_device *soft_iface)
 371 {
 372         struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
 373         struct bat_priv *bat_priv = netdev_priv(soft_iface);
 374         struct bcast_packet *bcast_packet;
 375         struct vlan_ethhdr *vhdr;
 376         struct softif_neigh *curr_softif_neigh = NULL;
 377         int data_len = skb->len, ret;
 378         short vid = -1;
 379         bool do_bcast = false;
 380
 381         if (atomic_read(&bat_priv->mesh_state) != MESH_ACTIVE)
 382                 goto dropped;
 383
 384         soft_iface->trans_start = jiffies;
 385
 386         switch (ntohs(ethhdr->h_proto)) {
 387         case ETH_P_8021Q:
 388                 vhdr = (struct vlan_ethhdr *)skb->data;
 389                 vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK;
 390
 391                 if (ntohs(vhdr->h_vlan_encapsulated_proto) != ETH_P_BATMAN)
 392                         break;
 393
 394                 /* fall through */
 395         case ETH_P_BATMAN:
 396                 softif_batman_recv(skb, soft_iface, vid);
 397                 goto end;
 398         }
 399
 400         /**
 401          * if we have a another chosen mesh exit node in range
 402          * it will transport the packets to the mesh
 403          */
 404         curr_softif_neigh = softif_neigh_get_selected(bat_priv);
 405         if ((curr_softif_neigh) && (curr_softif_neigh->vid == vid))
 406                 goto dropped;
 407
 408         /* TODO: check this for locks */
 409         hna_local_add(soft_iface, ethhdr->h_source);
 410
 411         if (is_multicast_ether_addr(ethhdr->h_dest)) {
 412                 ret = gw_is_target(bat_priv, skb);
 413
 414                 if (ret < 0)
 415                         goto dropped;
 416
 417                 if (ret == 0)
 418                         do_bcast = true;
 419         }
 420
 421         /* ethernet packet should be broadcasted */
 422         if (do_bcast) {
 423                 if (!bat_priv->primary_if)
 424                         goto dropped;
 425
 426                 if (my_skb_head_push(skb, sizeof(struct bcast_packet)) < 0)
 427                         goto dropped;
 428
 429                 bcast_packet = (struct bcast_packet *)skb->data;
 430                 bcast_packet->version = COMPAT_VERSION;
 431                 bcast_packet->ttl = TTL;
 432
 433                 /* batman packet type: broadcast */
 434                 bcast_packet->packet_type = BAT_BCAST;
 435
 436                 /* hw address of first interface is the orig mac because only
 437                  * this mac is known throughout the mesh */
 438                 memcpy(bcast_packet->orig,
 439                        bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN);
 440
 441                 /* set broadcast sequence number */
 442                 bcast_packet->seqno =
 443                         htonl(atomic_inc_return(&bat_priv->bcast_seqno));
 444
 445                 add_bcast_packet_to_list(bat_priv, skb);
 446
 447                 /* a copy is stored in the bcast list, therefore removing
 448                  * the original skb. */
 449                 kfree_skb(skb);
 450
 451         /* unicast packet */
 452         } else {
 453                 ret = unicast_send_skb(skb, bat_priv);
 454                 if (ret != 0)
 455                         goto dropped_freed;
 456         }
 457
 458         bat_priv->stats.tx_packets++;
 459         bat_priv->stats.tx_bytes += data_len;
 460         goto end;
 461
 462 dropped:
 463         kfree_skb(skb);
 464 dropped_freed:
 465         bat_priv->stats.tx_dropped++;
 466 end:
 467         if (curr_softif_neigh)
 468                 softif_neigh_free_ref(curr_softif_neigh);
 469         return NETDEV_TX_OK;
 470 }
 471
 472 void interface_rx(struct net_device *soft_iface,
 473                   struct sk_buff *skb, struct hard_iface *recv_if,
 474                   int hdr_size)
 475 {
 476         struct bat_priv *bat_priv = netdev_priv(soft_iface);
 477         struct unicast_packet *unicast_packet;
 478         struct ethhdr *ethhdr;
 479         struct vlan_ethhdr *vhdr;
 480         struct softif_neigh *curr_softif_neigh = NULL;
 481         short vid = -1;
 482         int ret;
 483
 484         /* check if enough space is available for pulling, and pull */
 485         if (!pskb_may_pull(skb, hdr_size))
 486                 goto dropped;
 487
 488         skb_pull_rcsum(skb, hdr_size);
 489         skb_reset_mac_header(skb);
 490
 491         ethhdr = (struct ethhdr *)skb_mac_header(skb);
 492
 493         switch (ntohs(ethhdr->h_proto)) {
 494         case ETH_P_8021Q:
 495                 vhdr = (struct vlan_ethhdr *)skb->data;
 496                 vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK;
 497
 498                 if (ntohs(vhdr->h_vlan_encapsulated_proto) != ETH_P_BATMAN)
 499                         break;
 500
 501                 /* fall through */
 502         case ETH_P_BATMAN:
 503                 goto dropped;
 504         }
 505
 506         /**
 507          * if we have a another chosen mesh exit node in range
 508          * it will transport the packets to the non-mesh network
 509          */
 510         curr_softif_neigh = softif_neigh_get_selected(bat_priv);
 511         if (curr_softif_neigh && (curr_softif_neigh->vid == vid)) {
 512                 skb_push(skb, hdr_size);
 513                 unicast_packet = (struct unicast_packet *)skb->data;
 514
 515                 if ((unicast_packet->packet_type != BAT_UNICAST) &&
 516                     (unicast_packet->packet_type != BAT_UNICAST_FRAG))
 517                         goto dropped;
 518
 519                 skb_reset_mac_header(skb);
 520
 521                 memcpy(unicast_packet->dest,
 522                        curr_softif_neigh->addr, ETH_ALEN);
 523                 ret = route_unicast_packet(skb, recv_if);
 524                 if (ret == NET_RX_DROP)
 525                         goto dropped;
 526
 527                 goto out;
 528         }
 529
 530         /* skb->dev & skb->pkt_type are set here */
 531         if (unlikely(!pskb_may_pull(skb, ETH_HLEN)))
 532                 goto dropped;
 533         skb->protocol = eth_type_trans(skb, soft_iface);
 534
 535         /* should not be neccesary anymore as we use skb_pull_rcsum()
 536          * TODO: please verify this and remove this TODO
 537          * -- Dec 21st 2009, Simon Wunderlich */
 538
 539 /*      skb->ip_summed = CHECKSUM_UNNECESSARY;*/
 540
 541         bat_priv->stats.rx_packets++;
 542         bat_priv->stats.rx_bytes += skb->len + sizeof(struct ethhdr);
 543
 544         soft_iface->last_rx = jiffies;
 545
 546         netif_rx(skb);
 547         goto out;
 548
 549 dropped:
 550         kfree_skb(skb);
 551 out:
 552         if (curr_softif_neigh)
 553                 softif_neigh_free_ref(curr_softif_neigh);
 554         return;
 555 }
 556
 557 #ifdef HAVE_NET_DEVICE_OPS
 558 static const struct net_device_ops bat_netdev_ops = {
 559         .ndo_open = interface_open,
 560         .ndo_stop = interface_release,
 561         .ndo_get_stats = interface_stats,
 562         .ndo_set_mac_address = interface_set_mac_addr,
 563         .ndo_change_mtu = interface_change_mtu,
 564         .ndo_start_xmit = interface_tx,
 565         .ndo_validate_addr = eth_validate_addr
 566 };
 567 #endif
 568
 569 static void interface_setup(struct net_device *dev)
 570 {
 571         struct bat_priv *priv = netdev_priv(dev);
 572         char dev_addr[ETH_ALEN];
 573
 574         ether_setup(dev);
 575
 576 #ifdef HAVE_NET_DEVICE_OPS
 577         dev->netdev_ops = &bat_netdev_ops;
 578 #else
 579         dev->open = interface_open;
 580         dev->stop = interface_release;
 581         dev->get_stats = interface_stats;
 582         dev->set_mac_address = interface_set_mac_addr;
 583         dev->change_mtu = interface_change_mtu;
 584         dev->hard_start_xmit = interface_tx;
 585 #endif
 586         dev->destructor = free_netdev;
 587         dev->tx_queue_len = 0;
 588
 589         /**
 590          * can't call min_mtu, because the needed variables
 591          * have not been initialized yet
 592          */
 593         dev->mtu = ETH_DATA_LEN;
 594         dev->hard_header_len = BAT_HEADER_LEN; /* reserve more space in the
 595                                                 * skbuff for our header */
 596
 597         /* generate random address */
 598         random_ether_addr(dev_addr);
 599         memcpy(dev->dev_addr, dev_addr, ETH_ALEN);
 600
 601         SET_ETHTOOL_OPS(dev, &bat_ethtool_ops);
 602
 603         memset(priv, 0, sizeof(struct bat_priv));
 604 }
 605
 606 struct net_device *softif_create(char *name)
 607 {
 608         struct net_device *soft_iface;
 609         struct bat_priv *bat_priv;
 610         int ret;
 611
 612         soft_iface = alloc_netdev(sizeof(struct bat_priv) , name,
 613                                    interface_setup);
 614
 615         if (!soft_iface) {
 616                 pr_err("Unable to allocate the batman interface: %s\n", name);
 617                 goto out;
 618         }
 619
 620         ret = register_netdev(soft_iface);
 621         if (ret < 0) {
 622                 pr_err("Unable to register the batman interface '%s': %i\n",
 623                        name, ret);
 624                 goto free_soft_iface;
 625         }
 626
 627         bat_priv = netdev_priv(soft_iface);
 628
 629         atomic_set(&bat_priv->aggregated_ogms, 1);
 630         atomic_set(&bat_priv->bonding, 0);
 631         atomic_set(&bat_priv->vis_mode, VIS_TYPE_CLIENT_UPDATE);
 632         atomic_set(&bat_priv->gw_mode, GW_MODE_OFF);
 633         atomic_set(&bat_priv->gw_sel_class, 20);
 634         atomic_set(&bat_priv->gw_bandwidth, 41);
 635         atomic_set(&bat_priv->orig_interval, 1000);
 636         atomic_set(&bat_priv->hop_penalty, 10);
 637         atomic_set(&bat_priv->log_level, 0);
 638         atomic_set(&bat_priv->fragmentation, 1);
 639         atomic_set(&bat_priv->bcast_queue_left, BCAST_QUEUE_LEN);
 640         atomic_set(&bat_priv->batman_queue_left, BATMAN_QUEUE_LEN);
 641
 642         atomic_set(&bat_priv->mesh_state, MESH_INACTIVE);
 643         atomic_set(&bat_priv->bcast_seqno, 1);
 644         atomic_set(&bat_priv->hna_local_changed, 0);
 645
 646         bat_priv->primary_if = NULL;
 647         bat_priv->num_ifaces = 0;
 648         bat_priv->softif_neigh = NULL;
 649
 650         ret = sysfs_add_meshif(soft_iface);
 651         if (ret < 0)
 652                 goto unreg_soft_iface;
 653
 654         ret = debugfs_add_meshif(soft_iface);
 655         if (ret < 0)
 656                 goto unreg_sysfs;
 657
 658         ret = mesh_init(soft_iface);
 659         if (ret < 0)
 660                 goto unreg_debugfs;
 661
 662         return soft_iface;
 663
 664 unreg_debugfs:
 665         debugfs_del_meshif(soft_iface);
 666 unreg_sysfs:
 667         sysfs_del_meshif(soft_iface);
 668 unreg_soft_iface:
 669         unregister_netdev(soft_iface);
 670         return NULL;
 671
 672 free_soft_iface:
 673         free_netdev(soft_iface);
 674 out:
 675         return NULL;
 676 }
 677
 678 void softif_destroy(struct net_device *soft_iface)
 679 {
 680         debugfs_del_meshif(soft_iface);
 681         sysfs_del_meshif(soft_iface);
 682         mesh_free(soft_iface);
 683         unregister_netdevice(soft_iface);
 684 }
 685
 686 int softif_is_valid(struct net_device *net_dev)
 687 {
 688 #ifdef HAVE_NET_DEVICE_OPS
 689         if (net_dev->netdev_ops->ndo_start_xmit == interface_tx)
 690                 return 1;
 691 #else
 692         if (net_dev->hard_start_xmit == interface_tx)
 693                 return 1;
 694 #endif
 695
 696         return 0;
 697 }
 698
 699 /* ethtool */
 700 static int bat_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 701 {
 702         cmd->supported = 0;
 703         cmd->advertising = 0;
 704         cmd->speed = SPEED_10;
 705         cmd->duplex = DUPLEX_FULL;
 706         cmd->port = PORT_TP;
 707         cmd->phy_address = 0;
 708         cmd->transceiver = XCVR_INTERNAL;
 709         cmd->autoneg = AUTONEG_DISABLE;
 710         cmd->maxtxpkt = 0;
 711         cmd->maxrxpkt = 0;
 712
 713         return 0;
 714 }
 715
 716 static void bat_get_drvinfo(struct net_device *dev,
 717                             struct ethtool_drvinfo *info)
 718 {
 719         strcpy(info->driver, "B.A.T.M.A.N. advanced");
 720         strcpy(info->version, SOURCE_VERSION);
 721         strcpy(info->fw_version, "N/A");
 722         strcpy(info->bus_info, "batman");
 723 }
 724
 725 static u32 bat_get_msglevel(struct net_device *dev)
 726 {
 727         return -EOPNOTSUPP;
 728 }
 729
 730 static void bat_set_msglevel(struct net_device *dev, u32 value)
 731 {
 732 }
 733
 734 static u32 bat_get_link(struct net_device *dev)
 735 {
 736         return 1;
 737 }
 738
 739 static u32 bat_get_rx_csum(struct net_device *dev)
 740 {
 741         return 0;
 742 }
 743
 744 static int bat_set_rx_csum(struct net_device *dev, u32 data)
 745 {
 746         return -EOPNOTSUPP;
 747 }