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 batadv_skb_set_priority(skb, 0); 233 234 /* ethernet packet should be broadcasted */ 235 if (do_bcast) { 236 primary_if = batadv_primary_if_get_selected(bat_priv); 237 if (!primary_if) 238 goto dropped; 239 240 /* in case of ARP request, we do not immediately broadcasti the 241 * packet, instead we first wait for DAT to try to retrieve the 242 * correct ARP entry 243 */ 244 if (batadv_dat_snoop_outgoing_arp_request(bat_priv, skb)) 245 brd_delay = msecs_to_jiffies(ARP_REQ_DELAY); 246 247 if (batadv_skb_head_push(skb, sizeof(*bcast_packet)) < 0) 248 goto dropped; 249 250 bcast_packet = (struct batadv_bcast_packet *)skb->data; 251 bcast_packet->header.version = BATADV_COMPAT_VERSION; 252 bcast_packet->header.ttl = BATADV_TTL; 253 254 /* batman packet type: broadcast */ 255 bcast_packet->header.packet_type = BATADV_BCAST; 256 bcast_packet->reserved = 0; 257 258 /* hw address of first interface is the orig mac because only 259 * this mac is known throughout the mesh 260 */ 261 memcpy(bcast_packet->orig, 262 primary_if->net_dev->dev_addr, ETH_ALEN); 263 264 /* set broadcast sequence number */ 265 seqno = atomic_inc_return(&bat_priv->bcast_seqno); 266 bcast_packet->seqno = htonl(seqno); 267 268 batadv_add_bcast_packet_to_list(bat_priv, skb, brd_delay); 269 270 /* a copy is stored in the bcast list, therefore removing 271 * the original skb. 272 */ 273 kfree_skb(skb); 274 275 /* unicast packet */ 276 } else { 277 if (atomic_read(&bat_priv->gw_mode) != BATADV_GW_MODE_OFF) { 278 ret = batadv_gw_out_of_range(bat_priv, skb); 279 if (ret) 280 goto dropped; 281 } 282 283 if (batadv_dat_snoop_outgoing_arp_request(bat_priv, skb)) 284 goto dropped; 285 286 batadv_dat_snoop_outgoing_arp_reply(bat_priv, skb); 287 288 ret = batadv_unicast_send_skb(bat_priv, skb); 289 if (ret != 0) 290 goto dropped_freed; 291 } 292 293 batadv_inc_counter(bat_priv, BATADV_CNT_TX); 294 batadv_add_counter(bat_priv, BATADV_CNT_TX_BYTES, data_len); 295 goto end; 296 297 dropped: 298 kfree_skb(skb); 299 dropped_freed: 300 batadv_inc_counter(bat_priv, BATADV_CNT_TX_DROPPED); 301 end: 302 if (primary_if) 303 batadv_hardif_free_ref(primary_if); 304 return NETDEV_TX_OK; 305 } 306 307 void batadv_interface_rx(struct net_device *soft_iface, 308 struct sk_buff *skb, struct batadv_hard_iface *recv_if, 309 int hdr_size, struct batadv_orig_node *orig_node) 310 { 311 struct batadv_priv *bat_priv = netdev_priv(soft_iface); 312 struct ethhdr *ethhdr; 313 struct vlan_ethhdr *vhdr; 314 struct batadv_header *batadv_header = (struct batadv_header *)skb->data; 315 unsigned short vid __maybe_unused = BATADV_NO_FLAGS; 316 __be16 ethertype = __constant_htons(ETH_P_BATMAN); 317 bool is_bcast; 318 319 is_bcast = (batadv_header->packet_type == BATADV_BCAST); 320 321 /* check if enough space is available for pulling, and pull */ 322 if (!pskb_may_pull(skb, hdr_size)) 323 goto dropped; 324 325 skb_pull_rcsum(skb, hdr_size); 326 skb_reset_mac_header(skb); 327 328 ethhdr = eth_hdr(skb); 329 330 switch (ntohs(ethhdr->h_proto)) { 331 case ETH_P_8021Q: 332 vhdr = (struct vlan_ethhdr *)skb->data; 333 vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK; 334 335 if (vhdr->h_vlan_encapsulated_proto != ethertype) 336 break; 337 338 /* fall through */ 339 case ETH_P_BATMAN: 340 goto dropped; 341 } 342 343 /* skb->dev & skb->pkt_type are set here */ 344 if (unlikely(!pskb_may_pull(skb, ETH_HLEN))) 345 goto dropped; 346 skb->protocol = eth_type_trans(skb, soft_iface); 347 348 /* should not be necessary anymore as we use skb_pull_rcsum() 349 * TODO: please verify this and remove this TODO 350 * -- Dec 21st 2009, Simon Wunderlich 351 */ 352 353 /* skb->ip_summed = CHECKSUM_UNNECESSARY; */ 354 355 batadv_inc_counter(bat_priv, BATADV_CNT_RX); 356 batadv_add_counter(bat_priv, BATADV_CNT_RX_BYTES, 357 skb->len + ETH_HLEN); 358 359 soft_iface->last_rx = jiffies; 360 361 /* Let the bridge loop avoidance check the packet. If will 362 * not handle it, we can safely push it up. 363 */ 364 if (batadv_bla_rx(bat_priv, skb, vid, is_bcast)) 365 goto out; 366 367 if (orig_node) 368 batadv_tt_add_temporary_global_entry(bat_priv, orig_node, 369 ethhdr->h_source); 370 371 if (batadv_is_ap_isolated(bat_priv, ethhdr->h_source, ethhdr->h_dest)) 372 goto dropped; 373 374 netif_rx(skb); 375 goto out; 376 377 dropped: 378 kfree_skb(skb); 379 out: 380 return; 381 } 382 383 /* batman-adv network devices have devices nesting below it and are a special 384 * "super class" of normal network devices; split their locks off into a 385 * separate class since they always nest. 386 */ 387 static struct lock_class_key batadv_netdev_xmit_lock_key; 388 static struct lock_class_key batadv_netdev_addr_lock_key; 389 390 /** 391 * batadv_set_lockdep_class_one - Set lockdep class for a single tx queue 392 * @dev: device which owns the tx queue 393 * @txq: tx queue to modify 394 * @_unused: always NULL 395 */ 396 static void batadv_set_lockdep_class_one(struct net_device *dev, 397 struct netdev_queue *txq, 398 void *_unused) 399 { 400 lockdep_set_class(&txq->_xmit_lock, &batadv_netdev_xmit_lock_key); 401 } 402 403 /** 404 * batadv_set_lockdep_class - Set txq and addr_list lockdep class 405 * @dev: network device to modify 406 */ 407 static void batadv_set_lockdep_class(struct net_device *dev) 408 { 409 lockdep_set_class(&dev->addr_list_lock, &batadv_netdev_addr_lock_key); 410 netdev_for_each_tx_queue(dev, batadv_set_lockdep_class_one, NULL); 411 } 412 413 /** 414 * batadv_softif_destroy_finish - cleans up the remains of a softif 415 * @work: work queue item 416 * 417 * Free the parts of the soft interface which can not be removed under 418 * rtnl lock (to prevent deadlock situations). 419 */ 420 static void batadv_softif_destroy_finish(struct work_struct *work) 421 { 422 struct batadv_priv *bat_priv; 423 struct net_device *soft_iface; 424 425 bat_priv = container_of(work, struct batadv_priv, 426 cleanup_work); 427 soft_iface = bat_priv->soft_iface; 428 429 batadv_sysfs_del_meshif(soft_iface); 430 431 rtnl_lock(); 432 unregister_netdevice(soft_iface); 433 rtnl_unlock(); 434 } 435 436 /** 437 * batadv_softif_init_late - late stage initialization of soft interface 438 * @dev: registered network device to modify 439 * 440 * Returns error code on failures 441 */ 442 static int batadv_softif_init_late(struct net_device *dev) 443 { 444 struct batadv_priv *bat_priv; 445 int ret; 446 size_t cnt_len = sizeof(uint64_t) * BATADV_CNT_NUM; 447 448 batadv_set_lockdep_class(dev); 449 450 bat_priv = netdev_priv(dev); 451 bat_priv->soft_iface = dev; 452 INIT_WORK(&bat_priv->cleanup_work, batadv_softif_destroy_finish); 453 454 /* batadv_interface_stats() needs to be available as soon as 455 * register_netdevice() has been called 456 */ 457 bat_priv->bat_counters = __alloc_percpu(cnt_len, __alignof__(uint64_t)); 458 if (!bat_priv->bat_counters) 459 return -ENOMEM; 460 461 atomic_set(&bat_priv->aggregated_ogms, 1); 462 atomic_set(&bat_priv->bonding, 0); 463 #ifdef CONFIG_BATMAN_ADV_BLA 464 atomic_set(&bat_priv->bridge_loop_avoidance, 0); 465 #endif 466 #ifdef CONFIG_BATMAN_ADV_DAT 467 atomic_set(&bat_priv->distributed_arp_table, 1); 468 #endif 469 atomic_set(&bat_priv->ap_isolation, 0); 470 atomic_set(&bat_priv->vis_mode, BATADV_VIS_TYPE_CLIENT_UPDATE); 471 atomic_set(&bat_priv->gw_mode, BATADV_GW_MODE_OFF); 472 atomic_set(&bat_priv->gw_sel_class, 20); 473 atomic_set(&bat_priv->gw_bandwidth, 41); 474 atomic_set(&bat_priv->orig_interval, 1000); 475 atomic_set(&bat_priv->hop_penalty, 30); 476 #ifdef CONFIG_BATMAN_ADV_DEBUG 477 atomic_set(&bat_priv->log_level, 0); 478 #endif 479 atomic_set(&bat_priv->fragmentation, 1); 480 atomic_set(&bat_priv->bcast_queue_left, BATADV_BCAST_QUEUE_LEN); 481 atomic_set(&bat_priv->batman_queue_left, BATADV_BATMAN_QUEUE_LEN); 482 483 atomic_set(&bat_priv->mesh_state, BATADV_MESH_INACTIVE); 484 atomic_set(&bat_priv->bcast_seqno, 1); 485 atomic_set(&bat_priv->tt.vn, 0); 486 atomic_set(&bat_priv->tt.local_changes, 0); 487 atomic_set(&bat_priv->tt.ogm_append_cnt, 0); 488 #ifdef CONFIG_BATMAN_ADV_BLA 489 atomic_set(&bat_priv->bla.num_requests, 0); 490 #endif 491 bat_priv->tt.last_changeset = NULL; 492 bat_priv->tt.last_changeset_len = 0; 493 494 bat_priv->primary_if = NULL; 495 bat_priv->num_ifaces = 0; 496 497 batadv_nc_init_bat_priv(bat_priv); 498 499 ret = batadv_algo_select(bat_priv, batadv_routing_algo); 500 if (ret < 0) 501 goto free_bat_counters; 502 503 ret = batadv_debugfs_add_meshif(dev); 504 if (ret < 0) 505 goto free_bat_counters; 506 507 ret = batadv_mesh_init(dev); 508 if (ret < 0) 509 goto unreg_debugfs; 510 511 return 0; 512 513 unreg_debugfs: 514 batadv_debugfs_del_meshif(dev); 515 free_bat_counters: 516 free_percpu(bat_priv->bat_counters); 517 bat_priv->bat_counters = NULL; 518 519 return ret; 520 } 521 522 /** 523 * batadv_softif_slave_add - Add a slave interface to a batadv_soft_interface 524 * @dev: batadv_soft_interface used as master interface 525 * @slave_dev: net_device which should become the slave interface 526 * 527 * Return 0 if successful or error otherwise. 528 */ 529 static int batadv_softif_slave_add(struct net_device *dev, 530 struct net_device *slave_dev) 531 { 532 struct batadv_hard_iface *hard_iface; 533 int ret = -EINVAL; 534 535 hard_iface = batadv_hardif_get_by_netdev(slave_dev); 536 if (!hard_iface || hard_iface->soft_iface != NULL) 537 goto out; 538 539 ret = batadv_hardif_enable_interface(hard_iface, dev->name); 540 541 out: 542 if (hard_iface) 543 batadv_hardif_free_ref(hard_iface); 544 return ret; 545 } 546 547 /** 548 * batadv_softif_slave_del - Delete a slave iface from a batadv_soft_interface 549 * @dev: batadv_soft_interface used as master interface 550 * @slave_dev: net_device which should be removed from the master interface 551 * 552 * Return 0 if successful or error otherwise. 553 */ 554 static int batadv_softif_slave_del(struct net_device *dev, 555 struct net_device *slave_dev) 556 { 557 struct batadv_hard_iface *hard_iface; 558 int ret = -EINVAL; 559 560 hard_iface = batadv_hardif_get_by_netdev(slave_dev); 561 562 if (!hard_iface || hard_iface->soft_iface != dev) 563 goto out; 564 565 batadv_hardif_disable_interface(hard_iface, BATADV_IF_CLEANUP_KEEP); 566 ret = 0; 567 568 out: 569 if (hard_iface) 570 batadv_hardif_free_ref(hard_iface); 571 return ret; 572 } 573 574 static const struct net_device_ops batadv_netdev_ops = { 575 .ndo_init = batadv_softif_init_late, 576 .ndo_open = batadv_interface_open, 577 .ndo_stop = batadv_interface_release, 578 .ndo_get_stats = batadv_interface_stats, 579 .ndo_set_mac_address = batadv_interface_set_mac_addr, 580 .ndo_change_mtu = batadv_interface_change_mtu, 581 .ndo_start_xmit = batadv_interface_tx, 582 .ndo_validate_addr = eth_validate_addr, 583 .ndo_add_slave = batadv_softif_slave_add, 584 .ndo_del_slave = batadv_softif_slave_del, 585 }; 586 587 /** 588 * batadv_softif_free - Deconstructor of batadv_soft_interface 589 * @dev: Device to cleanup and remove 590 */ 591 static void batadv_softif_free(struct net_device *dev) 592 { 593 batadv_debugfs_del_meshif(dev); 594 batadv_mesh_free(dev); 595 596 /* some scheduled RCU callbacks need the bat_priv struct to accomplish 597 * their tasks. Wait for them all to be finished before freeing the 598 * netdev and its private data (bat_priv) 599 */ 600 rcu_barrier(); 601 602 free_netdev(dev); 603 } 604 605 /** 606 * batadv_softif_init_early - early stage initialization of soft interface 607 * @dev: registered network device to modify 608 */ 609 static void batadv_softif_init_early(struct net_device *dev) 610 { 611 struct batadv_priv *priv = netdev_priv(dev); 612 613 ether_setup(dev); 614 615 dev->netdev_ops = &batadv_netdev_ops; 616 dev->destructor = batadv_softif_free; 617 dev->tx_queue_len = 0; 618 619 /* can't call min_mtu, because the needed variables 620 * have not been initialized yet 621 */ 622 dev->mtu = ETH_DATA_LEN; 623 /* reserve more space in the skbuff for our header */ 624 dev->hard_header_len = BATADV_HEADER_LEN; 625 626 /* generate random address */ 627 eth_hw_addr_random(dev); 628 629 SET_ETHTOOL_OPS(dev, &batadv_ethtool_ops); 630 631 memset(priv, 0, sizeof(*priv)); 632 } 633 634 struct net_device *batadv_softif_create(const char *name) 635 { 636 struct net_device *soft_iface; 637 int ret; 638 639 soft_iface = alloc_netdev(sizeof(struct batadv_priv), name, 640 batadv_softif_init_early); 641 if (!soft_iface) 642 return NULL; 643 644 soft_iface->rtnl_link_ops = &batadv_link_ops; 645 646 ret = register_netdevice(soft_iface); 647 if (ret < 0) { 648 pr_err("Unable to register the batman interface '%s': %i\n", 649 name, ret); 650 free_netdev(soft_iface); 651 return NULL; 652 } 653 654 return soft_iface; 655 } 656 657 /** 658 * batadv_softif_destroy_sysfs - deletion of batadv_soft_interface via sysfs 659 * @soft_iface: the to-be-removed batman-adv interface 660 */ 661 void batadv_softif_destroy_sysfs(struct net_device *soft_iface) 662 { 663 struct batadv_priv *bat_priv = netdev_priv(soft_iface); 664 665 queue_work(batadv_event_workqueue, &bat_priv->cleanup_work); 666 } 667 668 /** 669 * batadv_softif_destroy_netlink - deletion of batadv_soft_interface via netlink 670 * @soft_iface: the to-be-removed batman-adv interface 671 * @head: list pointer 672 */ 673 static void batadv_softif_destroy_netlink(struct net_device *soft_iface, 674 struct list_head *head) 675 { 676 struct batadv_hard_iface *hard_iface; 677 678 list_for_each_entry(hard_iface, &batadv_hardif_list, list) { 679 if (hard_iface->soft_iface == soft_iface) 680 batadv_hardif_disable_interface(hard_iface, 681 BATADV_IF_CLEANUP_KEEP); 682 } 683 684 batadv_sysfs_del_meshif(soft_iface); 685 unregister_netdevice_queue(soft_iface, head); 686 } 687 688 int batadv_softif_is_valid(const struct net_device *net_dev) 689 { 690 if (net_dev->netdev_ops->ndo_start_xmit == batadv_interface_tx) 691 return 1; 692 693 return 0; 694 } 695 696 struct rtnl_link_ops batadv_link_ops __read_mostly = { 697 .kind = "batadv", 698 .priv_size = sizeof(struct batadv_priv), 699 .setup = batadv_softif_init_early, 700 .dellink = batadv_softif_destroy_netlink, 701 }; 702 703 /* ethtool */ 704 static int batadv_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) 705 { 706 cmd->supported = 0; 707 cmd->advertising = 0; 708 ethtool_cmd_speed_set(cmd, SPEED_10); 709 cmd->duplex = DUPLEX_FULL; 710 cmd->port = PORT_TP; 711 cmd->phy_address = 0; 712 cmd->transceiver = XCVR_INTERNAL; 713 cmd->autoneg = AUTONEG_DISABLE; 714 cmd->maxtxpkt = 0; 715 cmd->maxrxpkt = 0; 716 717 return 0; 718 } 719 720 static void batadv_get_drvinfo(struct net_device *dev, 721 struct ethtool_drvinfo *info) 722 { 723 strlcpy(info->driver, "B.A.T.M.A.N. advanced", sizeof(info->driver)); 724 strlcpy(info->version, BATADV_SOURCE_VERSION, sizeof(info->version)); 725 strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); 726 strlcpy(info->bus_info, "batman", sizeof(info->bus_info)); 727 } 728 729 static u32 batadv_get_msglevel(struct net_device *dev) 730 { 731 return -EOPNOTSUPP; 732 } 733 734 static void batadv_set_msglevel(struct net_device *dev, u32 value) 735 { 736 } 737 738 static u32 batadv_get_link(struct net_device *dev) 739 { 740 return 1; 741 } 742 743 /* Inspired by drivers/net/ethernet/dlink/sundance.c:1702 744 * Declare each description string in struct.name[] to get fixed sized buffer 745 * and compile time checking for strings longer than ETH_GSTRING_LEN. 746 */ 747 static const struct { 748 const char name[ETH_GSTRING_LEN]; 749 } batadv_counters_strings[] = { 750 { "tx" }, 751 { "tx_bytes" }, 752 { "tx_dropped" }, 753 { "rx" }, 754 { "rx_bytes" }, 755 { "forward" }, 756 { "forward_bytes" }, 757 { "mgmt_tx" }, 758 { "mgmt_tx_bytes" }, 759 { "mgmt_rx" }, 760 { "mgmt_rx_bytes" }, 761 { "tt_request_tx" }, 762 { "tt_request_rx" }, 763 { "tt_response_tx" }, 764 { "tt_response_rx" }, 765 { "tt_roam_adv_tx" }, 766 { "tt_roam_adv_rx" }, 767 #ifdef CONFIG_BATMAN_ADV_DAT 768 { "dat_get_tx" }, 769 { "dat_get_rx" }, 770 { "dat_put_tx" }, 771 { "dat_put_rx" }, 772 { "dat_cached_reply_tx" }, 773 #endif 774 #ifdef CONFIG_BATMAN_ADV_NC 775 { "nc_code" }, 776 { "nc_code_bytes" }, 777 { "nc_recode" }, 778 { "nc_recode_bytes" }, 779 { "nc_buffer" }, 780 { "nc_decode" }, 781 { "nc_decode_bytes" }, 782 { "nc_decode_failed" }, 783 { "nc_sniffed" }, 784 #endif 785 }; 786 787 static void batadv_get_strings(struct net_device *dev, uint32_t stringset, 788 uint8_t *data) 789 { 790 if (stringset == ETH_SS_STATS) 791 memcpy(data, batadv_counters_strings, 792 sizeof(batadv_counters_strings)); 793 } 794 795 static void batadv_get_ethtool_stats(struct net_device *dev, 796 struct ethtool_stats *stats, 797 uint64_t *data) 798 { 799 struct batadv_priv *bat_priv = netdev_priv(dev); 800 int i; 801 802 for (i = 0; i < BATADV_CNT_NUM; i++) 803 data[i] = batadv_sum_counter(bat_priv, i); 804 } 805 806 static int batadv_get_sset_count(struct net_device *dev, int stringset) 807 { 808 if (stringset == ETH_SS_STATS) 809 return BATADV_CNT_NUM; 810 811 return -EOPNOTSUPP; 812 } 813