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 hard_iface *primary_if;
 219         struct hlist_node *node;
 220         struct softif_neigh *curr_softif_neigh;
 221         int ret = 0;
 222
 223         primary_if = primary_if_get_selected(bat_priv);
 224         if (!primary_if) {
 225                 ret = seq_printf(seq, "BATMAN mesh %s disabled - "
 226                                  "please specify interfaces to enable it\n",
 227                                  net_dev->name);
 228                 goto out;
 229         }
 230
 231         if (primary_if->if_status != IF_ACTIVE) {
 232                 ret = seq_printf(seq, "BATMAN mesh %s "
 233                                  "disabled - primary interface not active\n",
 234                                  net_dev->name);
 235                 goto out;
 236         }
 237
 238         seq_printf(seq, "Softif neighbor list (%s)\n", net_dev->name);
 239
 240         curr_softif_neigh = softif_neigh_get_selected(bat_priv);
 241         rcu_read_lock();
 242         hlist_for_each_entry_rcu(softif_neigh, node,
 243                                  &bat_priv->softif_neigh_list, list)
 244                 seq_printf(seq, "%s %pM (vid: %d)\n",
 245                                 curr_softif_neigh == softif_neigh
 246                                 ? "=>" : "  ", softif_neigh->addr,
 247                                 softif_neigh->vid);
 248         rcu_read_unlock();
 249         if (curr_softif_neigh)
 250                 softif_neigh_free_ref(curr_softif_neigh);
 251
 252 out:
 253         if (primary_if)
 254                 hardif_free_ref(primary_if);
 255         return ret;
 256 }
 257
 258 static void softif_batman_recv(struct sk_buff *skb, struct net_device *dev,
 259                                short vid)
 260 {
 261         struct bat_priv *bat_priv = netdev_priv(dev);
 262         struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
 263         struct batman_packet *batman_packet;
 264         struct softif_neigh *softif_neigh = NULL;
 265         struct hard_iface *primary_if = NULL;
 266         struct softif_neigh *curr_softif_neigh = NULL;
 267
 268         if (ntohs(ethhdr->h_proto) == ETH_P_8021Q)
 269                 batman_packet = (struct batman_packet *)
 270                                         (skb->data + ETH_HLEN + VLAN_HLEN);
 271         else
 272                 batman_packet = (struct batman_packet *)(skb->data + ETH_HLEN);
 273
 274         if (batman_packet->version != COMPAT_VERSION)
 275                 goto out;
 276
 277         if (batman_packet->packet_type != BAT_PACKET)
 278                 goto out;
 279
 280         if (!(batman_packet->flags & PRIMARIES_FIRST_HOP))
 281                 goto out;
 282
 283         if (is_my_mac(batman_packet->orig))
 284                 goto out;
 285
 286         softif_neigh = softif_neigh_get(bat_priv, batman_packet->orig, vid);
 287         if (!softif_neigh)
 288                 goto out;
 289
 290         curr_softif_neigh = softif_neigh_get_selected(bat_priv);
 291         if (!curr_softif_neigh)
 292                 goto out;
 293
 294         if (curr_softif_neigh == softif_neigh)
 295                 goto out;
 296
 297         primary_if = primary_if_get_selected(bat_priv);
 298         if (!primary_if)
 299                 goto out;
 300
 301         /* we got a neighbor but its mac is 'bigger' than ours  */
 302         if (memcmp(primary_if->net_dev->dev_addr,
 303                    softif_neigh->addr, ETH_ALEN) < 0)
 304                 goto out;
 305
 306         /* switch to new 'smallest neighbor' */
 307         if ((curr_softif_neigh) &&
 308             (memcmp(softif_neigh->addr, curr_softif_neigh->addr,
 309                                                         ETH_ALEN) < 0)) {
 310                 bat_dbg(DBG_ROUTES, bat_priv,
 311                         "Changing mesh exit point from %pM (vid: %d) "
 312                         "to %pM (vid: %d).\n",
 313                          curr_softif_neigh->addr,
 314                          curr_softif_neigh->vid,
 315                          softif_neigh->addr, softif_neigh->vid);
 316
 317                 softif_neigh_select(bat_priv, softif_neigh);
 318                 goto out;
 319         }
 320
 321         /* close own batX device and use softif_neigh as exit node */
 322         if ((!curr_softif_neigh) &&
 323             (memcmp(softif_neigh->addr,
 324                     primary_if->net_dev->dev_addr, ETH_ALEN) < 0)) {
 325                 bat_dbg(DBG_ROUTES, bat_priv,
 326                         "Setting mesh exit point to %pM (vid: %d).\n",
 327                         softif_neigh->addr, softif_neigh->vid);
 328
 329                 softif_neigh_select(bat_priv, softif_neigh);
 330                 goto out;
 331         }
 332
 333 out:
 334         kfree_skb(skb);
 335         if (softif_neigh)
 336                 softif_neigh_free_ref(softif_neigh);
 337         if (curr_softif_neigh)
 338                 softif_neigh_free_ref(curr_softif_neigh);
 339         if (primary_if)
 340                 hardif_free_ref(primary_if);
 341         return;
 342 }
 343
 344 static int interface_open(struct net_device *dev)
 345 {
 346         netif_start_queue(dev);
 347         return 0;
 348 }
 349
 350 static int interface_release(struct net_device *dev)
 351 {
 352         netif_stop_queue(dev);
 353         return 0;
 354 }
 355
 356 static struct net_device_stats *interface_stats(struct net_device *dev)
 357 {
 358         struct bat_priv *bat_priv = netdev_priv(dev);
 359         return &bat_priv->stats;
 360 }
 361
 362 static int interface_set_mac_addr(struct net_device *dev, void *p)
 363 {
 364         struct bat_priv *bat_priv = netdev_priv(dev);
 365         struct sockaddr *addr = p;
 366
 367         if (!is_valid_ether_addr(addr->sa_data))
 368                 return -EADDRNOTAVAIL;
 369
 370         /* only modify hna-table if it has been initialised before */
 371         if (atomic_read(&bat_priv->mesh_state) == MESH_ACTIVE) {
 372                 hna_local_remove(bat_priv, dev->dev_addr,
 373                                  "mac address changed");
 374                 hna_local_add(dev, addr->sa_data);
 375         }
 376
 377         memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
 378         return 0;
 379 }
 380
 381 static int interface_change_mtu(struct net_device *dev, int new_mtu)
 382 {
 383         /* check ranges */
 384         if ((new_mtu < 68) || (new_mtu > hardif_min_mtu(dev)))
 385                 return -EINVAL;
 386
 387         dev->mtu = new_mtu;
 388
 389         return 0;
 390 }
 391
 392 int interface_tx(struct sk_buff *skb, struct net_device *soft_iface)
 393 {
 394         struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
 395         struct bat_priv *bat_priv = netdev_priv(soft_iface);
 396         struct hard_iface *primary_if = NULL;
 397         struct bcast_packet *bcast_packet;
 398         struct vlan_ethhdr *vhdr;
 399         struct softif_neigh *curr_softif_neigh = NULL;
 400         int data_len = skb->len, ret;
 401         short vid = -1;
 402         bool do_bcast = false;
 403
 404         if (atomic_read(&bat_priv->mesh_state) != MESH_ACTIVE)
 405                 goto dropped;
 406
 407         soft_iface->trans_start = jiffies;
 408
 409         switch (ntohs(ethhdr->h_proto)) {
 410         case ETH_P_8021Q:
 411                 vhdr = (struct vlan_ethhdr *)skb->data;
 412                 vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK;
 413
 414                 if (ntohs(vhdr->h_vlan_encapsulated_proto) != ETH_P_BATMAN)
 415                         break;
 416
 417                 /* fall through */
 418         case ETH_P_BATMAN:
 419                 softif_batman_recv(skb, soft_iface, vid);
 420                 goto end;
 421         }
 422
 423         /**
 424          * if we have a another chosen mesh exit node in range
 425          * it will transport the packets to the mesh
 426          */
 427         curr_softif_neigh = softif_neigh_get_selected(bat_priv);
 428         if ((curr_softif_neigh) && (curr_softif_neigh->vid == vid))
 429                 goto dropped;
 430
 431         /* TODO: check this for locks */
 432         hna_local_add(soft_iface, ethhdr->h_source);
 433
 434         if (is_multicast_ether_addr(ethhdr->h_dest)) {
 435                 ret = gw_is_target(bat_priv, skb);
 436
 437                 if (ret < 0)
 438                         goto dropped;
 439
 440                 if (ret == 0)
 441                         do_bcast = true;
 442         }
 443
 444         /* ethernet packet should be broadcasted */
 445         if (do_bcast) {
 446                 primary_if = primary_if_get_selected(bat_priv);
 447                 if (!primary_if)
 448                         goto dropped;
 449
 450                 if (my_skb_head_push(skb, sizeof(struct bcast_packet)) < 0)
 451                         goto dropped;
 452
 453                 bcast_packet = (struct bcast_packet *)skb->data;
 454                 bcast_packet->version = COMPAT_VERSION;
 455                 bcast_packet->ttl = TTL;
 456
 457                 /* batman packet type: broadcast */
 458                 bcast_packet->packet_type = BAT_BCAST;
 459
 460                 /* hw address of first interface is the orig mac because only
 461                  * this mac is known throughout the mesh */
 462                 memcpy(bcast_packet->orig,
 463                        primary_if->net_dev->dev_addr, ETH_ALEN);
 464
 465                 /* set broadcast sequence number */
 466                 bcast_packet->seqno =
 467                         htonl(atomic_inc_return(&bat_priv->bcast_seqno));
 468
 469                 add_bcast_packet_to_list(bat_priv, skb);
 470
 471                 /* a copy is stored in the bcast list, therefore removing
 472                  * the original skb. */
 473                 kfree_skb(skb);
 474
 475         /* unicast packet */
 476         } else {
 477                 ret = unicast_send_skb(skb, bat_priv);
 478                 if (ret != 0)
 479                         goto dropped_freed;
 480         }
 481
 482         bat_priv->stats.tx_packets++;
 483         bat_priv->stats.tx_bytes += data_len;
 484         goto end;
 485
 486 dropped:
 487         kfree_skb(skb);
 488 dropped_freed:
 489         bat_priv->stats.tx_dropped++;
 490 end:
 491         if (curr_softif_neigh)
 492                 softif_neigh_free_ref(curr_softif_neigh);
 493         if (primary_if)
 494                 hardif_free_ref(primary_if);
 495         return NETDEV_TX_OK;
 496 }
 497
 498 void interface_rx(struct net_device *soft_iface,
 499                   struct sk_buff *skb, struct hard_iface *recv_if,
 500                   int hdr_size)
 501 {
 502         struct bat_priv *bat_priv = netdev_priv(soft_iface);
 503         struct unicast_packet *unicast_packet;
 504         struct ethhdr *ethhdr;
 505         struct vlan_ethhdr *vhdr;
 506         struct softif_neigh *curr_softif_neigh = NULL;
 507         short vid = -1;
 508         int ret;
 509
 510         /* check if enough space is available for pulling, and pull */
 511         if (!pskb_may_pull(skb, hdr_size))
 512                 goto dropped;
 513
 514         skb_pull_rcsum(skb, hdr_size);
 515         skb_reset_mac_header(skb);
 516
 517         ethhdr = (struct ethhdr *)skb_mac_header(skb);
 518
 519         switch (ntohs(ethhdr->h_proto)) {
 520         case ETH_P_8021Q:
 521                 vhdr = (struct vlan_ethhdr *)skb->data;
 522                 vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK;
 523
 524                 if (ntohs(vhdr->h_vlan_encapsulated_proto) != ETH_P_BATMAN)
 525                         break;
 526
 527                 /* fall through */
 528         case ETH_P_BATMAN:
 529                 goto dropped;
 530         }
 531
 532         /**
 533          * if we have a another chosen mesh exit node in range
 534          * it will transport the packets to the non-mesh network
 535          */
 536         curr_softif_neigh = softif_neigh_get_selected(bat_priv);
 537         if (curr_softif_neigh && (curr_softif_neigh->vid == vid)) {
 538                 skb_push(skb, hdr_size);
 539                 unicast_packet = (struct unicast_packet *)skb->data;
 540
 541                 if ((unicast_packet->packet_type != BAT_UNICAST) &&
 542                     (unicast_packet->packet_type != BAT_UNICAST_FRAG))
 543                         goto dropped;
 544
 545                 skb_reset_mac_header(skb);
 546
 547                 memcpy(unicast_packet->dest,
 548                        curr_softif_neigh->addr, ETH_ALEN);
 549                 ret = route_unicast_packet(skb, recv_if);
 550                 if (ret == NET_RX_DROP)
 551                         goto dropped;
 552
 553                 goto out;
 554         }
 555
 556         /* skb->dev & skb->pkt_type are set here */
 557         if (unlikely(!pskb_may_pull(skb, ETH_HLEN)))
 558                 goto dropped;
 559         skb->protocol = eth_type_trans(skb, soft_iface);
 560
 561         /* should not be neccesary anymore as we use skb_pull_rcsum()
 562          * TODO: please verify this and remove this TODO
 563          * -- Dec 21st 2009, Simon Wunderlich */
 564
 565 /*      skb->ip_summed = CHECKSUM_UNNECESSARY;*/
 566
 567         bat_priv->stats.rx_packets++;
 568         bat_priv->stats.rx_bytes += skb->len + sizeof(struct ethhdr);
 569
 570         soft_iface->last_rx = jiffies;
 571
 572         netif_rx(skb);
 573         goto out;
 574
 575 dropped:
 576         kfree_skb(skb);
 577 out:
 578         if (curr_softif_neigh)
 579                 softif_neigh_free_ref(curr_softif_neigh);
 580         return;
 581 }
 582
 583 #ifdef HAVE_NET_DEVICE_OPS
 584 static const struct net_device_ops bat_netdev_ops = {
 585         .ndo_open = interface_open,
 586         .ndo_stop = interface_release,
 587         .ndo_get_stats = interface_stats,
 588         .ndo_set_mac_address = interface_set_mac_addr,
 589         .ndo_change_mtu = interface_change_mtu,
 590         .ndo_start_xmit = interface_tx,
 591         .ndo_validate_addr = eth_validate_addr
 592 };
 593 #endif
 594
 595 static void interface_setup(struct net_device *dev)
 596 {
 597         struct bat_priv *priv = netdev_priv(dev);
 598         char dev_addr[ETH_ALEN];
 599
 600         ether_setup(dev);
 601
 602 #ifdef HAVE_NET_DEVICE_OPS
 603         dev->netdev_ops = &bat_netdev_ops;
 604 #else
 605         dev->open = interface_open;
 606         dev->stop = interface_release;
 607         dev->get_stats = interface_stats;
 608         dev->set_mac_address = interface_set_mac_addr;
 609         dev->change_mtu = interface_change_mtu;
 610         dev->hard_start_xmit = interface_tx;
 611 #endif
 612         dev->destructor = free_netdev;
 613         dev->tx_queue_len = 0;
 614
 615         /**
 616          * can't call min_mtu, because the needed variables
 617          * have not been initialized yet
 618          */
 619         dev->mtu = ETH_DATA_LEN;
 620         dev->hard_header_len = BAT_HEADER_LEN; /* reserve more space in the
 621                                                 * skbuff for our header */
 622
 623         /* generate random address */
 624         random_ether_addr(dev_addr);
 625         memcpy(dev->dev_addr, dev_addr, ETH_ALEN);
 626
 627         SET_ETHTOOL_OPS(dev, &bat_ethtool_ops);
 628
 629         memset(priv, 0, sizeof(struct bat_priv));
 630 }
 631
 632 struct net_device *softif_create(char *name)
 633 {
 634         struct net_device *soft_iface;
 635         struct bat_priv *bat_priv;
 636         int ret;
 637
 638         soft_iface = alloc_netdev(sizeof(struct bat_priv) , name,
 639                                    interface_setup);
 640
 641         if (!soft_iface) {
 642                 pr_err("Unable to allocate the batman interface: %s\n", name);
 643                 goto out;
 644         }
 645
 646         ret = register_netdev(soft_iface);
 647         if (ret < 0) {
 648                 pr_err("Unable to register the batman interface '%s': %i\n",
 649                        name, ret);
 650                 goto free_soft_iface;
 651         }
 652
 653         bat_priv = netdev_priv(soft_iface);
 654
 655         atomic_set(&bat_priv->aggregated_ogms, 1);
 656         atomic_set(&bat_priv->bonding, 0);
 657         atomic_set(&bat_priv->vis_mode, VIS_TYPE_CLIENT_UPDATE);
 658         atomic_set(&bat_priv->gw_mode, GW_MODE_OFF);
 659         atomic_set(&bat_priv->gw_sel_class, 20);
 660         atomic_set(&bat_priv->gw_bandwidth, 41);
 661         atomic_set(&bat_priv->orig_interval, 1000);
 662         atomic_set(&bat_priv->hop_penalty, 10);
 663         atomic_set(&bat_priv->log_level, 0);
 664         atomic_set(&bat_priv->fragmentation, 1);
 665         atomic_set(&bat_priv->bcast_queue_left, BCAST_QUEUE_LEN);
 666         atomic_set(&bat_priv->batman_queue_left, BATMAN_QUEUE_LEN);
 667
 668         atomic_set(&bat_priv->mesh_state, MESH_INACTIVE);
 669         atomic_set(&bat_priv->bcast_seqno, 1);
 670         atomic_set(&bat_priv->hna_local_changed, 0);
 671
 672         bat_priv->primary_if = NULL;
 673         bat_priv->num_ifaces = 0;
 674         bat_priv->softif_neigh = NULL;
 675
 676         ret = sysfs_add_meshif(soft_iface);
 677         if (ret < 0)
 678                 goto unreg_soft_iface;
 679
 680         ret = debugfs_add_meshif(soft_iface);
 681         if (ret < 0)
 682                 goto unreg_sysfs;
 683
 684         ret = mesh_init(soft_iface);
 685         if (ret < 0)
 686                 goto unreg_debugfs;
 687
 688         return soft_iface;
 689
 690 unreg_debugfs:
 691         debugfs_del_meshif(soft_iface);
 692 unreg_sysfs:
 693         sysfs_del_meshif(soft_iface);
 694 unreg_soft_iface:
 695         unregister_netdev(soft_iface);
 696         return NULL;
 697
 698 free_soft_iface:
 699         free_netdev(soft_iface);
 700 out:
 701         return NULL;
 702 }
 703
 704 void softif_destroy(struct net_device *soft_iface)
 705 {
 706         debugfs_del_meshif(soft_iface);
 707         sysfs_del_meshif(soft_iface);
 708         mesh_free(soft_iface);
 709         unregister_netdevice(soft_iface);
 710 }
 711
 712 int softif_is_valid(struct net_device *net_dev)
 713 {
 714 #ifdef HAVE_NET_DEVICE_OPS
 715         if (net_dev->netdev_ops->ndo_start_xmit == interface_tx)
 716                 return 1;
 717 #else
 718         if (net_dev->hard_start_xmit == interface_tx)
 719                 return 1;
 720 #endif
 721
 722         return 0;
 723 }
 724
 725 /* ethtool */
 726 static int bat_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 727 {
 728         cmd->supported = 0;
 729         cmd->advertising = 0;
 730         cmd->speed = SPEED_10;
 731         cmd->duplex = DUPLEX_FULL;
 732         cmd->port = PORT_TP;
 733         cmd->phy_address = 0;
 734         cmd->transceiver = XCVR_INTERNAL;
 735         cmd->autoneg = AUTONEG_DISABLE;
 736         cmd->maxtxpkt = 0;
 737         cmd->maxrxpkt = 0;
 738
 739         return 0;
 740 }
 741
 742 static void bat_get_drvinfo(struct net_device *dev,
 743                             struct ethtool_drvinfo *info)
 744 {
 745         strcpy(info->driver, "B.A.T.M.A.N. advanced");
 746         strcpy(info->version, SOURCE_VERSION);
 747         strcpy(info->fw_version, "N/A");
 748         strcpy(info->bus_info, "batman");
 749 }
 750
 751 static u32 bat_get_msglevel(struct net_device *dev)
 752 {
 753         return -EOPNOTSUPP;
 754 }
 755
 756 static void bat_set_msglevel(struct net_device *dev, u32 value)
 757 {
 758 }
 759
 760 static u32 bat_get_link(struct net_device *dev)
 761 {
 762         return 1;
 763 }
 764
 765 static u32 bat_get_rx_csum(struct net_device *dev)
 766 {
 767         return 0;
 768 }
 769
 770 static int bat_set_rx_csum(struct net_device *dev, u32 data)
 771 {
 772         return -EOPNOTSUPP;
 773 }