1 /* Copyright (C) 2007-2013 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 "distributed-arp-table.h" 24 #include "routing.h" 25 #include "send.h" 26 #include "debugfs.h" 27 #include "translation-table.h" 28 #include "hash.h" 29 #include "gateway_common.h" 30 #include "gateway_client.h" 31 #include "sysfs.h" 32 #include "originator.h" 33 #include <linux/slab.h> 34 #include <linux/ethtool.h> 35 #include <linux/etherdevice.h> 36 #include <linux/if_vlan.h> 37 #include <linux/if_ether.h> 38 #include "unicast.h" 39 #include "bridge_loop_avoidance.h" 40 #include "network-coding.h" 41 42 43 static int batadv_get_settings(struct net_device *dev, struct ethtool_cmd *cmd); 44 static void batadv_get_drvinfo(struct net_device *dev, 45 struct ethtool_drvinfo *info); 46 static u32 batadv_get_msglevel(struct net_device *dev); 47 static void batadv_set_msglevel(struct net_device *dev, u32 value); 48 static u32 batadv_get_link(struct net_device *dev); 49 static void batadv_get_strings(struct net_device *dev, u32 stringset, u8 *data); 50 static void batadv_get_ethtool_stats(struct net_device *dev, 51 struct ethtool_stats *stats, u64 *data); 52 static int batadv_get_sset_count(struct net_device *dev, int stringset); 53 54 static const struct ethtool_ops batadv_ethtool_ops = { 55 .get_settings = batadv_get_settings, 56 .get_drvinfo = batadv_get_drvinfo, 57 .get_msglevel = batadv_get_msglevel, 58 .set_msglevel = batadv_set_msglevel, 59 .get_link = batadv_get_link, 60 .get_strings = batadv_get_strings, 61 .get_ethtool_stats = batadv_get_ethtool_stats, 62 .get_sset_count = batadv_get_sset_count, 63 }; 64 65 int batadv_skb_head_push(struct sk_buff *skb, unsigned int len) 66 { 67 int result; 68 69 /* TODO: We must check if we can release all references to non-payload 70 * data using skb_header_release in our skbs to allow skb_cow_header to 71 * work optimally. This means that those skbs are not allowed to read 72 * or write any data which is before the current position of skb->data 73 * after that call and thus allow other skbs with the same data buffer 74 * to write freely in that area. 75 */ 76 result = skb_cow_head(skb, len); 77 if (result < 0) 78 return result; 79 80 skb_push(skb, len); 81 return 0; 82 } 83 84 static int batadv_interface_open(struct net_device *dev) 85 { 86 netif_start_queue(dev); 87 return 0; 88 } 89 90 static int batadv_interface_release(struct net_device *dev) 91 { 92 netif_stop_queue(dev); 93 return 0; 94 } 95 96 static struct net_device_stats *batadv_interface_stats(struct net_device *dev) 97 { 98 struct batadv_priv *bat_priv = netdev_priv(dev); 99 struct net_device_stats *stats = &bat_priv->stats; 100 101 stats->tx_packets = batadv_sum_counter(bat_priv, BATADV_CNT_TX); 102 stats->tx_bytes = batadv_sum_counter(bat_priv, BATADV_CNT_TX_BYTES); 103 stats->tx_dropped = batadv_sum_counter(bat_priv, BATADV_CNT_TX_DROPPED); 104 stats->rx_packets = batadv_sum_counter(bat_priv, BATADV_CNT_RX); 105 stats->rx_bytes = batadv_sum_counter(bat_priv, BATADV_CNT_RX_BYTES); 106 return stats; 107 } 108 109 static int batadv_interface_set_mac_addr(struct net_device *dev, void *p) 110 { 111 struct batadv_priv *bat_priv = netdev_priv(dev); 112 struct sockaddr *addr = p; 113 uint8_t old_addr[ETH_ALEN]; 114 115 if (!is_valid_ether_addr(addr->sa_data)) 116 return -EADDRNOTAVAIL; 117 118 memcpy(old_addr, dev->dev_addr, ETH_ALEN); 119 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); 120 121 /* only modify transtable if it has been initialized before */ 122 if (atomic_read(&bat_priv->mesh_state) == BATADV_MESH_ACTIVE) { 123 batadv_tt_local_remove(bat_priv, old_addr, 124 "mac address changed", false); 125 batadv_tt_local_add(dev, addr->sa_data, BATADV_NULL_IFINDEX); 126 } 127 128 return 0; 129 } 130 131 static int batadv_interface_change_mtu(struct net_device *dev, int new_mtu) 132 { 133 /* check ranges */ 134 if ((new_mtu < 68) || (new_mtu > batadv_hardif_min_mtu(dev))) 135 return -EINVAL; 136 137 dev->mtu = new_mtu; 138 139 return 0; 140 } 141 142 static int batadv_interface_tx(struct sk_buff *skb, 143 struct net_device *soft_iface) 144 { 145 struct ethhdr *ethhdr = (struct ethhdr *)skb->data; 146 struct batadv_priv *bat_priv = netdev_priv(soft_iface); 147 struct batadv_hard_iface *primary_if = NULL; 148 struct batadv_bcast_packet *bcast_packet; 149 struct vlan_ethhdr *vhdr; 150 __be16 ethertype = __constant_htons(ETH_P_BATMAN); 151 static const uint8_t stp_addr[ETH_ALEN] = {0x01, 0x80, 0xC2, 0x00, 152 0x00, 0x00}; 153 static const uint8_t ectp_addr[ETH_ALEN] = {0xCF, 0x00, 0x00, 0x00, 154 0x00, 0x00}; 155 unsigned int header_len = 0; 156 int data_len = skb->len, ret; 157 unsigned short vid __maybe_unused = BATADV_NO_FLAGS; 158 bool do_bcast = false; 159 uint32_t seqno; 160 unsigned long brd_delay = 1; 161 162 if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE) 163 goto dropped; 164 165 soft_iface->trans_start = jiffies; 166 167 switch (ntohs(ethhdr->h_proto)) { 168 case ETH_P_8021Q: 169 vhdr = (struct vlan_ethhdr *)skb->data; 170 vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK; 171 vid |= BATADV_VLAN_HAS_TAG; 172 173 if (vhdr->h_vlan_encapsulated_proto != ethertype) 174 break; 175 176 /* fall through */ 177 case ETH_P_BATMAN: 178 goto dropped; 179 } 180 181 if (batadv_bla_tx(bat_priv, skb, vid)) 182 goto dropped; 183 184 /* skb->data might have been reallocated by batadv_bla_tx() */ 185 ethhdr = (struct ethhdr *)skb->data; 186 187 /* Register the client MAC in the transtable */ 188 if (!is_multicast_ether_addr(ethhdr->h_source)) 189 batadv_tt_local_add(soft_iface, ethhdr->h_source, skb->skb_iif); 190 191 /* don't accept stp packets. STP does not help in meshes. 192 * better use the bridge loop avoidance ... 193 * 194 * The same goes for ECTP sent at least by some Cisco Switches, 195 * it might confuse the mesh when used with bridge loop avoidance. 196 */ 197 if (batadv_compare_eth(ethhdr->h_dest, stp_addr)) 198 goto dropped; 199 200 if (batadv_compare_eth(ethhdr->h_dest, ectp_addr)) 201 goto dropped; 202 203 if (is_multicast_ether_addr(ethhdr->h_dest)) { 204 do_bcast = true; 205 206 switch (atomic_read(&bat_priv->gw_mode)) { 207 case BATADV_GW_MODE_SERVER: 208 /* gateway servers should not send dhcp 209 * requests into the mesh 210 */ 211 ret = batadv_gw_is_dhcp_target(skb, &header_len); 212 if (ret) 213 goto dropped; 214 break; 215 case BATADV_GW_MODE_CLIENT: 216 /* gateway clients should send dhcp requests 217 * via unicast to their gateway 218 */ 219 ret = batadv_gw_is_dhcp_target(skb, &header_len); 220 if (ret) 221 do_bcast = false; 222 break; 223 case BATADV_GW_MODE_OFF: 224 default: 225 break; 226 } 227 228 /* reminder: ethhdr might have become unusable from here on 229 * (batadv_gw_is_dhcp_target() might have reallocated skb data) 230 */ 231 } 232 233 batadv_skb_set_priority(skb, 0); 234 235 /* ethernet packet should be broadcasted */ 236 if (do_bcast) { 237 primary_if = batadv_primary_if_get_selected(bat_priv); 238 if (!primary_if) 239 goto dropped; 240 241 /* in case of ARP request, we do not immediately broadcasti the 242 * packet, instead we first wait for DAT to try to retrieve the 243 * correct ARP entry 244 */ 245 if (batadv_dat_snoop_outgoing_arp_request(bat_priv, skb)) 246 brd_delay = msecs_to_jiffies(ARP_REQ_DELAY); 247 248 if (batadv_skb_head_push(skb, sizeof(*bcast_packet)) < 0) 249 goto dropped; 250 251 bcast_packet = (struct batadv_bcast_packet *)skb->data; 252 bcast_packet->header.version = BATADV_COMPAT_VERSION; 253 bcast_packet->header.ttl = BATADV_TTL; 254 255 /* batman packet type: broadcast */ 256 bcast_packet->header.packet_type = BATADV_BCAST; 257 bcast_packet->reserved = 0; 258 259 /* hw address of first interface is the orig mac because only 260 * this mac is known throughout the mesh 261 */ 262 memcpy(bcast_packet->orig, 263 primary_if->net_dev->dev_addr, ETH_ALEN); 264 265 /* set broadcast sequence number */ 266 seqno = atomic_inc_return(&bat_priv->bcast_seqno); 267 bcast_packet->seqno = htonl(seqno); 268 269 batadv_add_bcast_packet_to_list(bat_priv, skb, brd_delay); 270 271 /* a copy is stored in the bcast list, therefore removing 272 * the original skb. 273 */ 274 kfree_skb(skb); 275 276 /* unicast packet */ 277 } else { 278 if (atomic_read(&bat_priv->gw_mode) != BATADV_GW_MODE_OFF) { 279 ret = batadv_gw_out_of_range(bat_priv, skb); 280 if (ret) 281 goto dropped; 282 } 283 284 if (batadv_dat_snoop_outgoing_arp_request(bat_priv, skb)) 285 goto dropped; 286 287 batadv_dat_snoop_outgoing_arp_reply(bat_priv, skb); 288 289 ret = batadv_unicast_send_skb(bat_priv, skb); 290 if (ret != 0) 291 goto dropped_freed; 292 } 293 294 batadv_inc_counter(bat_priv, BATADV_CNT_TX); 295 batadv_add_counter(bat_priv, BATADV_CNT_TX_BYTES, data_len); 296 goto end; 297 298 dropped: 299 kfree_skb(skb); 300 dropped_freed: 301 batadv_inc_counter(bat_priv, BATADV_CNT_TX_DROPPED); 302 end: 303 if (primary_if) 304 batadv_hardif_free_ref(primary_if); 305 return NETDEV_TX_OK; 306 } 307 308 void batadv_interface_rx(struct net_device *soft_iface, 309 struct sk_buff *skb, struct batadv_hard_iface *recv_if, 310 int hdr_size, struct batadv_orig_node *orig_node) 311 { 312 struct batadv_priv *bat_priv = netdev_priv(soft_iface); 313 struct ethhdr *ethhdr; 314 struct vlan_ethhdr *vhdr; 315 struct batadv_header *batadv_header = (struct batadv_header *)skb->data; 316 unsigned short vid __maybe_unused = BATADV_NO_FLAGS; 317 __be16 ethertype = __constant_htons(ETH_P_BATMAN); 318 bool is_bcast; 319 320 is_bcast = (batadv_header->packet_type == BATADV_BCAST); 321 322 /* check if enough space is available for pulling, and pull */ 323 if (!pskb_may_pull(skb, hdr_size)) 324 goto dropped; 325 326 skb_pull_rcsum(skb, hdr_size); 327 skb_reset_mac_header(skb); 328 329 ethhdr = eth_hdr(skb); 330 331 switch (ntohs(ethhdr->h_proto)) { 332 case ETH_P_8021Q: 333 vhdr = (struct vlan_ethhdr *)skb->data; 334 vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK; 335 vid |= BATADV_VLAN_HAS_TAG; 336 337 if (vhdr->h_vlan_encapsulated_proto != ethertype) 338 break; 339 340 /* fall through */ 341 case ETH_P_BATMAN: 342 goto dropped; 343 } 344 345 /* skb->dev & skb->pkt_type are set here */ 346 if (unlikely(!pskb_may_pull(skb, ETH_HLEN))) 347 goto dropped; 348 skb->protocol = eth_type_trans(skb, soft_iface); 349 350 /* should not be necessary anymore as we use skb_pull_rcsum() 351 * TODO: please verify this and remove this TODO 352 * -- Dec 21st 2009, Simon Wunderlich 353 */ 354 355 /* skb->ip_summed = CHECKSUM_UNNECESSARY; */ 356 357 batadv_inc_counter(bat_priv, BATADV_CNT_RX); 358 batadv_add_counter(bat_priv, BATADV_CNT_RX_BYTES, 359 skb->len + ETH_HLEN); 360 361 soft_iface->last_rx = jiffies; 362 363 /* Let the bridge loop avoidance check the packet. If will 364 * not handle it, we can safely push it up. 365 */ 366 if (batadv_bla_rx(bat_priv, skb, vid, is_bcast)) 367 goto out; 368 369 if (orig_node) 370 batadv_tt_add_temporary_global_entry(bat_priv, orig_node, 371 ethhdr->h_source); 372 373 if (batadv_is_ap_isolated(bat_priv, ethhdr->h_source, ethhdr->h_dest)) 374 goto dropped; 375 376 netif_rx(skb); 377 goto out; 378 379 dropped: 380 kfree_skb(skb); 381 out: 382 return; 383 } 384 385 /* batman-adv network devices have devices nesting below it and are a special 386 * "super class" of normal network devices; split their locks off into a 387 * separate class since they always nest. 388 */ 389 static struct lock_class_key batadv_netdev_xmit_lock_key; 390 static struct lock_class_key batadv_netdev_addr_lock_key; 391 392 /** 393 * batadv_set_lockdep_class_one - Set lockdep class for a single tx queue 394 * @dev: device which owns the tx queue 395 * @txq: tx queue to modify 396 * @_unused: always NULL 397 */ 398 static void batadv_set_lockdep_class_one(struct net_device *dev, 399 struct netdev_queue *txq, 400 void *_unused) 401 { 402 lockdep_set_class(&txq->_xmit_lock, &batadv_netdev_xmit_lock_key); 403 } 404 405 /** 406 * batadv_set_lockdep_class - Set txq and addr_list lockdep class 407 * @dev: network device to modify 408 */ 409 static void batadv_set_lockdep_class(struct net_device *dev) 410 { 411 lockdep_set_class(&dev->addr_list_lock, &batadv_netdev_addr_lock_key); 412 netdev_for_each_tx_queue(dev, batadv_set_lockdep_class_one, NULL); 413 } 414 415 /** 416 * batadv_softif_destroy_finish - cleans up the remains of a softif 417 * @work: work queue item 418 * 419 * Free the parts of the soft interface which can not be removed under 420 * rtnl lock (to prevent deadlock situations). 421 */ 422 static void batadv_softif_destroy_finish(struct work_struct *work) 423 { 424 struct batadv_priv *bat_priv; 425 struct net_device *soft_iface; 426 427 bat_priv = container_of(work, struct batadv_priv, 428 cleanup_work); 429 soft_iface = bat_priv->soft_iface; 430 431 batadv_sysfs_del_meshif(soft_iface); 432 433 rtnl_lock(); 434 unregister_netdevice(soft_iface); 435 rtnl_unlock(); 436 } 437 438 /** 439 * batadv_softif_init_late - late stage initialization of soft interface 440 * @dev: registered network device to modify 441 * 442 * Returns error code on failures 443 */ 444 static int batadv_softif_init_late(struct net_device *dev) 445 { 446 struct batadv_priv *bat_priv; 447 int ret; 448 size_t cnt_len = sizeof(uint64_t) * BATADV_CNT_NUM; 449 450 batadv_set_lockdep_class(dev); 451 452 bat_priv = netdev_priv(dev); 453 bat_priv->soft_iface = dev; 454 INIT_WORK(&bat_priv->cleanup_work, batadv_softif_destroy_finish); 455 456 /* batadv_interface_stats() needs to be available as soon as 457 * register_netdevice() has been called 458 */ 459 bat_priv->bat_counters = __alloc_percpu(cnt_len, __alignof__(uint64_t)); 460 if (!bat_priv->bat_counters) 461 return -ENOMEM; 462 463 atomic_set(&bat_priv->aggregated_ogms, 1); 464 atomic_set(&bat_priv->bonding, 0); 465 #ifdef CONFIG_BATMAN_ADV_BLA 466 atomic_set(&bat_priv->bridge_loop_avoidance, 0); 467 #endif 468 #ifdef CONFIG_BATMAN_ADV_DAT 469 atomic_set(&bat_priv->distributed_arp_table, 1); 470 #endif 471 atomic_set(&bat_priv->ap_isolation, 0); 472 atomic_set(&bat_priv->vis_mode, BATADV_VIS_TYPE_CLIENT_UPDATE); 473 atomic_set(&bat_priv->gw_mode, BATADV_GW_MODE_OFF); 474 atomic_set(&bat_priv->gw_sel_class, 20); 475 atomic_set(&bat_priv->gw_bandwidth, 41); 476 atomic_set(&bat_priv->orig_interval, 1000); 477 atomic_set(&bat_priv->hop_penalty, 30); 478 #ifdef CONFIG_BATMAN_ADV_DEBUG 479 atomic_set(&bat_priv->log_level, 0); 480 #endif 481 atomic_set(&bat_priv->fragmentation, 1); 482 atomic_set(&bat_priv->bcast_queue_left, BATADV_BCAST_QUEUE_LEN); 483 atomic_set(&bat_priv->batman_queue_left, BATADV_BATMAN_QUEUE_LEN); 484 485 atomic_set(&bat_priv->mesh_state, BATADV_MESH_INACTIVE); 486 atomic_set(&bat_priv->bcast_seqno, 1); 487 atomic_set(&bat_priv->tt.vn, 0); 488 atomic_set(&bat_priv->tt.local_changes, 0); 489 atomic_set(&bat_priv->tt.ogm_append_cnt, 0); 490 #ifdef CONFIG_BATMAN_ADV_BLA 491 atomic_set(&bat_priv->bla.num_requests, 0); 492 #endif 493 bat_priv->tt.last_changeset = NULL; 494 bat_priv->tt.last_changeset_len = 0; 495 496 bat_priv->primary_if = NULL; 497 bat_priv->num_ifaces = 0; 498 499 batadv_nc_init_bat_priv(bat_priv); 500 501 ret = batadv_algo_select(bat_priv, batadv_routing_algo); 502 if (ret < 0) 503 goto free_bat_counters; 504 505 ret = batadv_debugfs_add_meshif(dev); 506 if (ret < 0) 507 goto free_bat_counters; 508 509 ret = batadv_mesh_init(dev); 510 if (ret < 0) 511 goto unreg_debugfs; 512 513 return 0; 514 515 unreg_debugfs: 516 batadv_debugfs_del_meshif(dev); 517 free_bat_counters: 518 free_percpu(bat_priv->bat_counters); 519 bat_priv->bat_counters = NULL; 520 521 return ret; 522 } 523 524 /** 525 * batadv_softif_slave_add - Add a slave interface to a batadv_soft_interface 526 * @dev: batadv_soft_interface used as master interface 527 * @slave_dev: net_device which should become the slave interface 528 * 529 * Return 0 if successful or error otherwise. 530 */ 531 static int batadv_softif_slave_add(struct net_device *dev, 532 struct net_device *slave_dev) 533 { 534 struct batadv_hard_iface *hard_iface; 535 int ret = -EINVAL; 536 537 hard_iface = batadv_hardif_get_by_netdev(slave_dev); 538 if (!hard_iface || hard_iface->soft_iface != NULL) 539 goto out; 540 541 ret = batadv_hardif_enable_interface(hard_iface, dev->name); 542 543 out: 544 if (hard_iface) 545 batadv_hardif_free_ref(hard_iface); 546 return ret; 547 } 548 549 /** 550 * batadv_softif_slave_del - Delete a slave iface from a batadv_soft_interface 551 * @dev: batadv_soft_interface used as master interface 552 * @slave_dev: net_device which should be removed from the master interface 553 * 554 * Return 0 if successful or error otherwise. 555 */ 556 static int batadv_softif_slave_del(struct net_device *dev, 557 struct net_device *slave_dev) 558 { 559 struct batadv_hard_iface *hard_iface; 560 int ret = -EINVAL; 561 562 hard_iface = batadv_hardif_get_by_netdev(slave_dev); 563 564 if (!hard_iface || hard_iface->soft_iface != dev) 565 goto out; 566 567 batadv_hardif_disable_interface(hard_iface, BATADV_IF_CLEANUP_KEEP); 568 ret = 0; 569 570 out: 571 if (hard_iface) 572 batadv_hardif_free_ref(hard_iface); 573 return ret; 574 } 575 576 static const struct net_device_ops batadv_netdev_ops = { 577 .ndo_init = batadv_softif_init_late, 578 .ndo_open = batadv_interface_open, 579 .ndo_stop = batadv_interface_release, 580 .ndo_get_stats = batadv_interface_stats, 581 .ndo_set_mac_address = batadv_interface_set_mac_addr, 582 .ndo_change_mtu = batadv_interface_change_mtu, 583 .ndo_start_xmit = batadv_interface_tx, 584 .ndo_validate_addr = eth_validate_addr, 585 .ndo_add_slave = batadv_softif_slave_add, 586 .ndo_del_slave = batadv_softif_slave_del, 587 }; 588 589 /** 590 * batadv_softif_free - Deconstructor of batadv_soft_interface 591 * @dev: Device to cleanup and remove 592 */ 593 static void batadv_softif_free(struct net_device *dev) 594 { 595 batadv_debugfs_del_meshif(dev); 596 batadv_mesh_free(dev); 597 598 /* some scheduled RCU callbacks need the bat_priv struct to accomplish 599 * their tasks. Wait for them all to be finished before freeing the 600 * netdev and its private data (bat_priv) 601 */ 602 rcu_barrier(); 603 604 free_netdev(dev); 605 } 606 607 /** 608 * batadv_softif_init_early - early stage initialization of soft interface 609 * @dev: registered network device to modify 610 */ 611 static void batadv_softif_init_early(struct net_device *dev) 612 { 613 struct batadv_priv *priv = netdev_priv(dev); 614 615 ether_setup(dev); 616 617 dev->netdev_ops = &batadv_netdev_ops; 618 dev->destructor = batadv_softif_free; 619 dev->tx_queue_len = 0; 620 621 /* can't call min_mtu, because the needed variables 622 * have not been initialized yet 623 */ 624 dev->mtu = ETH_DATA_LEN; 625 /* reserve more space in the skbuff for our header */ 626 dev->hard_header_len = BATADV_HEADER_LEN; 627 628 /* generate random address */ 629 eth_hw_addr_random(dev); 630 631 SET_ETHTOOL_OPS(dev, &batadv_ethtool_ops); 632 633 memset(priv, 0, sizeof(*priv)); 634 } 635 636 struct net_device *batadv_softif_create(const char *name) 637 { 638 struct net_device *soft_iface; 639 int ret; 640 641 soft_iface = alloc_netdev(sizeof(struct batadv_priv), name, 642 batadv_softif_init_early); 643 if (!soft_iface) 644 return NULL; 645 646 soft_iface->rtnl_link_ops = &batadv_link_ops; 647 648 ret = register_netdevice(soft_iface); 649 if (ret < 0) { 650 pr_err("Unable to register the batman interface '%s': %i\n", 651 name, ret); 652 free_netdev(soft_iface); 653 return NULL; 654 } 655 656 return soft_iface; 657 } 658 659 /** 660 * batadv_softif_destroy_sysfs - deletion of batadv_soft_interface via sysfs 661 * @soft_iface: the to-be-removed batman-adv interface 662 */ 663 void batadv_softif_destroy_sysfs(struct net_device *soft_iface) 664 { 665 struct batadv_priv *bat_priv = netdev_priv(soft_iface); 666 667 queue_work(batadv_event_workqueue, &bat_priv->cleanup_work); 668 } 669 670 /** 671 * batadv_softif_destroy_netlink - deletion of batadv_soft_interface via netlink 672 * @soft_iface: the to-be-removed batman-adv interface 673 * @head: list pointer 674 */ 675 static void batadv_softif_destroy_netlink(struct net_device *soft_iface, 676 struct list_head *head) 677 { 678 struct batadv_hard_iface *hard_iface; 679 680 list_for_each_entry(hard_iface, &batadv_hardif_list, list) { 681 if (hard_iface->soft_iface == soft_iface) 682 batadv_hardif_disable_interface(hard_iface, 683 BATADV_IF_CLEANUP_KEEP); 684 } 685 686 batadv_sysfs_del_meshif(soft_iface); 687 unregister_netdevice_queue(soft_iface, head); 688 } 689 690 int batadv_softif_is_valid(const struct net_device *net_dev) 691 { 692 if (net_dev->netdev_ops->ndo_start_xmit == batadv_interface_tx) 693 return 1; 694 695 return 0; 696 } 697 698 struct rtnl_link_ops batadv_link_ops __read_mostly = { 699 .kind = "batadv", 700 .priv_size = sizeof(struct batadv_priv), 701 .setup = batadv_softif_init_early, 702 .dellink = batadv_softif_destroy_netlink, 703 }; 704 705 /* ethtool */ 706 static int batadv_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) 707 { 708 cmd->supported = 0; 709 cmd->advertising = 0; 710 ethtool_cmd_speed_set(cmd, SPEED_10); 711 cmd->duplex = DUPLEX_FULL; 712 cmd->port = PORT_TP; 713 cmd->phy_address = 0; 714 cmd->transceiver = XCVR_INTERNAL; 715 cmd->autoneg = AUTONEG_DISABLE; 716 cmd->maxtxpkt = 0; 717 cmd->maxrxpkt = 0; 718 719 return 0; 720 } 721 722 static void batadv_get_drvinfo(struct net_device *dev, 723 struct ethtool_drvinfo *info) 724 { 725 strlcpy(info->driver, "B.A.T.M.A.N. advanced", sizeof(info->driver)); 726 strlcpy(info->version, BATADV_SOURCE_VERSION, sizeof(info->version)); 727 strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); 728 strlcpy(info->bus_info, "batman", sizeof(info->bus_info)); 729 } 730 731 static u32 batadv_get_msglevel(struct net_device *dev) 732 { 733 return -EOPNOTSUPP; 734 } 735 736 static void batadv_set_msglevel(struct net_device *dev, u32 value) 737 { 738 } 739 740 static u32 batadv_get_link(struct net_device *dev) 741 { 742 return 1; 743 } 744 745 /* Inspired by drivers/net/ethernet/dlink/sundance.c:1702 746 * Declare each description string in struct.name[] to get fixed sized buffer 747 * and compile time checking for strings longer than ETH_GSTRING_LEN. 748 */ 749 static const struct { 750 const char name[ETH_GSTRING_LEN]; 751 } batadv_counters_strings[] = { 752 { "tx" }, 753 { "tx_bytes" }, 754 { "tx_dropped" }, 755 { "rx" }, 756 { "rx_bytes" }, 757 { "forward" }, 758 { "forward_bytes" }, 759 { "mgmt_tx" }, 760 { "mgmt_tx_bytes" }, 761 { "mgmt_rx" }, 762 { "mgmt_rx_bytes" }, 763 { "tt_request_tx" }, 764 { "tt_request_rx" }, 765 { "tt_response_tx" }, 766 { "tt_response_rx" }, 767 { "tt_roam_adv_tx" }, 768 { "tt_roam_adv_rx" }, 769 #ifdef CONFIG_BATMAN_ADV_DAT 770 { "dat_get_tx" }, 771 { "dat_get_rx" }, 772 { "dat_put_tx" }, 773 { "dat_put_rx" }, 774 { "dat_cached_reply_tx" }, 775 #endif 776 #ifdef CONFIG_BATMAN_ADV_NC 777 { "nc_code" }, 778 { "nc_code_bytes" }, 779 { "nc_recode" }, 780 { "nc_recode_bytes" }, 781 { "nc_buffer" }, 782 { "nc_decode" }, 783 { "nc_decode_bytes" }, 784 { "nc_decode_failed" }, 785 { "nc_sniffed" }, 786 #endif 787 }; 788 789 static void batadv_get_strings(struct net_device *dev, uint32_t stringset, 790 uint8_t *data) 791 { 792 if (stringset == ETH_SS_STATS) 793 memcpy(data, batadv_counters_strings, 794 sizeof(batadv_counters_strings)); 795 } 796 797 static void batadv_get_ethtool_stats(struct net_device *dev, 798 struct ethtool_stats *stats, 799 uint64_t *data) 800 { 801 struct batadv_priv *bat_priv = netdev_priv(dev); 802 int i; 803 804 for (i = 0; i < BATADV_CNT_NUM; i++) 805 data[i] = batadv_sum_counter(bat_priv, i); 806 } 807 808 static int batadv_get_sset_count(struct net_device *dev, int stringset) 809 { 810 if (stringset == ETH_SS_STATS) 811 return BATADV_CNT_NUM; 812 813 return -EOPNOTSUPP; 814 } 815