soft-interface.c 22 KB

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