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