main.c 33 KB

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  1. /*
  2. * Copyright 2002-2005, Instant802 Networks, Inc.
  3. * Copyright 2005-2006, Devicescape Software, Inc.
  4. * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
  5. *
  6. * This program is free software; you can redistribute it and/or modify
  7. * it under the terms of the GNU General Public License version 2 as
  8. * published by the Free Software Foundation.
  9. */
  10. #include <net/mac80211.h>
  11. #include <linux/module.h>
  12. #include <linux/init.h>
  13. #include <linux/netdevice.h>
  14. #include <linux/types.h>
  15. #include <linux/slab.h>
  16. #include <linux/skbuff.h>
  17. #include <linux/etherdevice.h>
  18. #include <linux/if_arp.h>
  19. #include <linux/rtnetlink.h>
  20. #include <linux/bitmap.h>
  21. #include <linux/pm_qos.h>
  22. #include <linux/inetdevice.h>
  23. #include <net/net_namespace.h>
  24. #include <net/cfg80211.h>
  25. #include <net/addrconf.h>
  26. #include "ieee80211_i.h"
  27. #include "driver-ops.h"
  28. #include "rate.h"
  29. #include "mesh.h"
  30. #include "wep.h"
  31. #include "led.h"
  32. #include "cfg.h"
  33. #include "debugfs.h"
  34. void ieee80211_configure_filter(struct ieee80211_local *local)
  35. {
  36. u64 mc;
  37. unsigned int changed_flags;
  38. unsigned int new_flags = 0;
  39. if (atomic_read(&local->iff_promiscs))
  40. new_flags |= FIF_PROMISC_IN_BSS;
  41. if (atomic_read(&local->iff_allmultis))
  42. new_flags |= FIF_ALLMULTI;
  43. if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
  44. test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
  45. new_flags |= FIF_BCN_PRBRESP_PROMISC;
  46. if (local->fif_probe_req || local->probe_req_reg)
  47. new_flags |= FIF_PROBE_REQ;
  48. if (local->fif_fcsfail)
  49. new_flags |= FIF_FCSFAIL;
  50. if (local->fif_plcpfail)
  51. new_flags |= FIF_PLCPFAIL;
  52. if (local->fif_control)
  53. new_flags |= FIF_CONTROL;
  54. if (local->fif_other_bss)
  55. new_flags |= FIF_OTHER_BSS;
  56. if (local->fif_pspoll)
  57. new_flags |= FIF_PSPOLL;
  58. spin_lock_bh(&local->filter_lock);
  59. changed_flags = local->filter_flags ^ new_flags;
  60. mc = drv_prepare_multicast(local, &local->mc_list);
  61. spin_unlock_bh(&local->filter_lock);
  62. /* be a bit nasty */
  63. new_flags |= (1<<31);
  64. drv_configure_filter(local, changed_flags, &new_flags, mc);
  65. WARN_ON(new_flags & (1<<31));
  66. local->filter_flags = new_flags & ~(1<<31);
  67. }
  68. static void ieee80211_reconfig_filter(struct work_struct *work)
  69. {
  70. struct ieee80211_local *local =
  71. container_of(work, struct ieee80211_local, reconfig_filter);
  72. ieee80211_configure_filter(local);
  73. }
  74. static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
  75. {
  76. struct ieee80211_sub_if_data *sdata;
  77. struct ieee80211_channel *chan;
  78. u32 changed = 0;
  79. int power;
  80. enum nl80211_channel_type channel_type;
  81. u32 offchannel_flag;
  82. bool scanning = false;
  83. offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
  84. if (local->scan_channel) {
  85. chan = local->scan_channel;
  86. /* If scanning on oper channel, use whatever channel-type
  87. * is currently in use.
  88. */
  89. if (chan == local->_oper_channel)
  90. channel_type = local->_oper_channel_type;
  91. else
  92. channel_type = NL80211_CHAN_NO_HT;
  93. } else if (local->tmp_channel) {
  94. chan = local->tmp_channel;
  95. channel_type = NL80211_CHAN_NO_HT;
  96. } else {
  97. chan = local->_oper_channel;
  98. channel_type = local->_oper_channel_type;
  99. }
  100. if (chan != local->_oper_channel ||
  101. channel_type != local->_oper_channel_type)
  102. local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
  103. else
  104. local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
  105. offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
  106. if (offchannel_flag || chan != local->hw.conf.channel ||
  107. channel_type != local->hw.conf.channel_type) {
  108. local->hw.conf.channel = chan;
  109. local->hw.conf.channel_type = channel_type;
  110. changed |= IEEE80211_CONF_CHANGE_CHANNEL;
  111. }
  112. if (!conf_is_ht(&local->hw.conf)) {
  113. /*
  114. * mac80211.h documents that this is only valid
  115. * when the channel is set to an HT type, and
  116. * that otherwise STATIC is used.
  117. */
  118. local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
  119. } else if (local->hw.conf.smps_mode != local->smps_mode) {
  120. local->hw.conf.smps_mode = local->smps_mode;
  121. changed |= IEEE80211_CONF_CHANGE_SMPS;
  122. }
  123. scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
  124. test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning) ||
  125. test_bit(SCAN_HW_SCANNING, &local->scanning);
  126. power = chan->max_power;
  127. rcu_read_lock();
  128. list_for_each_entry_rcu(sdata, &local->interfaces, list) {
  129. if (!rcu_access_pointer(sdata->vif.chanctx_conf))
  130. continue;
  131. power = min(power, sdata->vif.bss_conf.txpower);
  132. }
  133. rcu_read_unlock();
  134. if (local->hw.conf.power_level != power) {
  135. changed |= IEEE80211_CONF_CHANGE_POWER;
  136. local->hw.conf.power_level = power;
  137. }
  138. return changed;
  139. }
  140. int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
  141. {
  142. int ret = 0;
  143. might_sleep();
  144. if (!local->use_chanctx)
  145. changed |= ieee80211_hw_conf_chan(local);
  146. else
  147. changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
  148. IEEE80211_CONF_CHANGE_POWER);
  149. if (changed && local->open_count) {
  150. ret = drv_config(local, changed);
  151. /*
  152. * Goal:
  153. * HW reconfiguration should never fail, the driver has told
  154. * us what it can support so it should live up to that promise.
  155. *
  156. * Current status:
  157. * rfkill is not integrated with mac80211 and a
  158. * configuration command can thus fail if hardware rfkill
  159. * is enabled
  160. *
  161. * FIXME: integrate rfkill with mac80211 and then add this
  162. * WARN_ON() back
  163. *
  164. */
  165. /* WARN_ON(ret); */
  166. }
  167. return ret;
  168. }
  169. void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
  170. u32 changed)
  171. {
  172. struct ieee80211_local *local = sdata->local;
  173. if (!changed)
  174. return;
  175. drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
  176. }
  177. u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
  178. {
  179. sdata->vif.bss_conf.use_cts_prot = false;
  180. sdata->vif.bss_conf.use_short_preamble = false;
  181. sdata->vif.bss_conf.use_short_slot = false;
  182. return BSS_CHANGED_ERP_CTS_PROT |
  183. BSS_CHANGED_ERP_PREAMBLE |
  184. BSS_CHANGED_ERP_SLOT;
  185. }
  186. static void ieee80211_tasklet_handler(unsigned long data)
  187. {
  188. struct ieee80211_local *local = (struct ieee80211_local *) data;
  189. struct sta_info *sta, *tmp;
  190. struct skb_eosp_msg_data *eosp_data;
  191. struct sk_buff *skb;
  192. while ((skb = skb_dequeue(&local->skb_queue)) ||
  193. (skb = skb_dequeue(&local->skb_queue_unreliable))) {
  194. switch (skb->pkt_type) {
  195. case IEEE80211_RX_MSG:
  196. /* Clear skb->pkt_type in order to not confuse kernel
  197. * netstack. */
  198. skb->pkt_type = 0;
  199. ieee80211_rx(&local->hw, skb);
  200. break;
  201. case IEEE80211_TX_STATUS_MSG:
  202. skb->pkt_type = 0;
  203. ieee80211_tx_status(&local->hw, skb);
  204. break;
  205. case IEEE80211_EOSP_MSG:
  206. eosp_data = (void *)skb->cb;
  207. for_each_sta_info(local, eosp_data->sta, sta, tmp) {
  208. /* skip wrong virtual interface */
  209. if (memcmp(eosp_data->iface,
  210. sta->sdata->vif.addr, ETH_ALEN))
  211. continue;
  212. clear_sta_flag(sta, WLAN_STA_SP);
  213. break;
  214. }
  215. dev_kfree_skb(skb);
  216. break;
  217. default:
  218. WARN(1, "mac80211: Packet is of unknown type %d\n",
  219. skb->pkt_type);
  220. dev_kfree_skb(skb);
  221. break;
  222. }
  223. }
  224. }
  225. static void ieee80211_restart_work(struct work_struct *work)
  226. {
  227. struct ieee80211_local *local =
  228. container_of(work, struct ieee80211_local, restart_work);
  229. /* wait for scan work complete */
  230. flush_workqueue(local->workqueue);
  231. mutex_lock(&local->mtx);
  232. WARN(test_bit(SCAN_HW_SCANNING, &local->scanning) ||
  233. rcu_dereference_protected(local->sched_scan_sdata,
  234. lockdep_is_held(&local->mtx)),
  235. "%s called with hardware scan in progress\n", __func__);
  236. mutex_unlock(&local->mtx);
  237. rtnl_lock();
  238. ieee80211_scan_cancel(local);
  239. ieee80211_reconfig(local);
  240. rtnl_unlock();
  241. }
  242. void ieee80211_restart_hw(struct ieee80211_hw *hw)
  243. {
  244. struct ieee80211_local *local = hw_to_local(hw);
  245. trace_api_restart_hw(local);
  246. wiphy_info(hw->wiphy,
  247. "Hardware restart was requested\n");
  248. /* use this reason, ieee80211_reconfig will unblock it */
  249. ieee80211_stop_queues_by_reason(hw,
  250. IEEE80211_QUEUE_STOP_REASON_SUSPEND);
  251. /*
  252. * Stop all Rx during the reconfig. We don't want state changes
  253. * or driver callbacks while this is in progress.
  254. */
  255. local->in_reconfig = true;
  256. barrier();
  257. schedule_work(&local->restart_work);
  258. }
  259. EXPORT_SYMBOL(ieee80211_restart_hw);
  260. #ifdef CONFIG_INET
  261. static int ieee80211_ifa_changed(struct notifier_block *nb,
  262. unsigned long data, void *arg)
  263. {
  264. struct in_ifaddr *ifa = arg;
  265. struct ieee80211_local *local =
  266. container_of(nb, struct ieee80211_local,
  267. ifa_notifier);
  268. struct net_device *ndev = ifa->ifa_dev->dev;
  269. struct wireless_dev *wdev = ndev->ieee80211_ptr;
  270. struct in_device *idev;
  271. struct ieee80211_sub_if_data *sdata;
  272. struct ieee80211_bss_conf *bss_conf;
  273. struct ieee80211_if_managed *ifmgd;
  274. int c = 0;
  275. /* Make sure it's our interface that got changed */
  276. if (!wdev)
  277. return NOTIFY_DONE;
  278. if (wdev->wiphy != local->hw.wiphy)
  279. return NOTIFY_DONE;
  280. sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
  281. bss_conf = &sdata->vif.bss_conf;
  282. /* ARP filtering is only supported in managed mode */
  283. if (sdata->vif.type != NL80211_IFTYPE_STATION)
  284. return NOTIFY_DONE;
  285. idev = __in_dev_get_rtnl(sdata->dev);
  286. if (!idev)
  287. return NOTIFY_DONE;
  288. ifmgd = &sdata->u.mgd;
  289. mutex_lock(&ifmgd->mtx);
  290. /* Copy the addresses to the bss_conf list */
  291. ifa = idev->ifa_list;
  292. while (ifa) {
  293. if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
  294. bss_conf->arp_addr_list[c] = ifa->ifa_address;
  295. ifa = ifa->ifa_next;
  296. c++;
  297. }
  298. bss_conf->arp_addr_cnt = c;
  299. /* Configure driver only if associated (which also implies it is up) */
  300. if (ifmgd->associated)
  301. ieee80211_bss_info_change_notify(sdata,
  302. BSS_CHANGED_ARP_FILTER);
  303. mutex_unlock(&ifmgd->mtx);
  304. return NOTIFY_DONE;
  305. }
  306. #endif
  307. #if IS_ENABLED(CONFIG_IPV6)
  308. static int ieee80211_ifa6_changed(struct notifier_block *nb,
  309. unsigned long data, void *arg)
  310. {
  311. struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
  312. struct inet6_dev *idev = ifa->idev;
  313. struct net_device *ndev = ifa->idev->dev;
  314. struct ieee80211_local *local =
  315. container_of(nb, struct ieee80211_local, ifa6_notifier);
  316. struct wireless_dev *wdev = ndev->ieee80211_ptr;
  317. struct ieee80211_sub_if_data *sdata;
  318. /* Make sure it's our interface that got changed */
  319. if (!wdev || wdev->wiphy != local->hw.wiphy)
  320. return NOTIFY_DONE;
  321. sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
  322. /*
  323. * For now only support station mode. This is mostly because
  324. * doing AP would have to handle AP_VLAN in some way ...
  325. */
  326. if (sdata->vif.type != NL80211_IFTYPE_STATION)
  327. return NOTIFY_DONE;
  328. drv_ipv6_addr_change(local, sdata, idev);
  329. return NOTIFY_DONE;
  330. }
  331. #endif
  332. static int ieee80211_napi_poll(struct napi_struct *napi, int budget)
  333. {
  334. struct ieee80211_local *local =
  335. container_of(napi, struct ieee80211_local, napi);
  336. return local->ops->napi_poll(&local->hw, budget);
  337. }
  338. void ieee80211_napi_schedule(struct ieee80211_hw *hw)
  339. {
  340. struct ieee80211_local *local = hw_to_local(hw);
  341. napi_schedule(&local->napi);
  342. }
  343. EXPORT_SYMBOL(ieee80211_napi_schedule);
  344. void ieee80211_napi_complete(struct ieee80211_hw *hw)
  345. {
  346. struct ieee80211_local *local = hw_to_local(hw);
  347. napi_complete(&local->napi);
  348. }
  349. EXPORT_SYMBOL(ieee80211_napi_complete);
  350. /* There isn't a lot of sense in it, but you can transmit anything you like */
  351. static const struct ieee80211_txrx_stypes
  352. ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
  353. [NL80211_IFTYPE_ADHOC] = {
  354. .tx = 0xffff,
  355. .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
  356. BIT(IEEE80211_STYPE_AUTH >> 4) |
  357. BIT(IEEE80211_STYPE_DEAUTH >> 4) |
  358. BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
  359. },
  360. [NL80211_IFTYPE_STATION] = {
  361. .tx = 0xffff,
  362. .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
  363. BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
  364. },
  365. [NL80211_IFTYPE_AP] = {
  366. .tx = 0xffff,
  367. .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
  368. BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
  369. BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
  370. BIT(IEEE80211_STYPE_DISASSOC >> 4) |
  371. BIT(IEEE80211_STYPE_AUTH >> 4) |
  372. BIT(IEEE80211_STYPE_DEAUTH >> 4) |
  373. BIT(IEEE80211_STYPE_ACTION >> 4),
  374. },
  375. [NL80211_IFTYPE_AP_VLAN] = {
  376. /* copy AP */
  377. .tx = 0xffff,
  378. .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
  379. BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
  380. BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
  381. BIT(IEEE80211_STYPE_DISASSOC >> 4) |
  382. BIT(IEEE80211_STYPE_AUTH >> 4) |
  383. BIT(IEEE80211_STYPE_DEAUTH >> 4) |
  384. BIT(IEEE80211_STYPE_ACTION >> 4),
  385. },
  386. [NL80211_IFTYPE_P2P_CLIENT] = {
  387. .tx = 0xffff,
  388. .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
  389. BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
  390. },
  391. [NL80211_IFTYPE_P2P_GO] = {
  392. .tx = 0xffff,
  393. .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
  394. BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
  395. BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
  396. BIT(IEEE80211_STYPE_DISASSOC >> 4) |
  397. BIT(IEEE80211_STYPE_AUTH >> 4) |
  398. BIT(IEEE80211_STYPE_DEAUTH >> 4) |
  399. BIT(IEEE80211_STYPE_ACTION >> 4),
  400. },
  401. [NL80211_IFTYPE_MESH_POINT] = {
  402. .tx = 0xffff,
  403. .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
  404. BIT(IEEE80211_STYPE_AUTH >> 4) |
  405. BIT(IEEE80211_STYPE_DEAUTH >> 4),
  406. },
  407. [NL80211_IFTYPE_P2P_DEVICE] = {
  408. .tx = 0xffff,
  409. .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
  410. BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
  411. },
  412. };
  413. static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
  414. .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
  415. IEEE80211_HT_AMPDU_PARM_DENSITY,
  416. .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
  417. IEEE80211_HT_CAP_MAX_AMSDU |
  418. IEEE80211_HT_CAP_SGI_20 |
  419. IEEE80211_HT_CAP_SGI_40),
  420. .mcs = {
  421. .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
  422. 0xff, 0xff, 0xff, 0xff, 0xff, },
  423. },
  424. };
  425. static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
  426. .vht_cap_info =
  427. cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
  428. IEEE80211_VHT_CAP_SHORT_GI_80 |
  429. IEEE80211_VHT_CAP_SHORT_GI_160 |
  430. IEEE80211_VHT_CAP_RXSTBC_1 |
  431. IEEE80211_VHT_CAP_RXSTBC_2 |
  432. IEEE80211_VHT_CAP_RXSTBC_3 |
  433. IEEE80211_VHT_CAP_RXSTBC_4 |
  434. IEEE80211_VHT_CAP_TXSTBC |
  435. IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
  436. IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
  437. IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
  438. IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
  439. IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
  440. .supp_mcs = {
  441. .rx_mcs_map = cpu_to_le16(~0),
  442. .tx_mcs_map = cpu_to_le16(~0),
  443. },
  444. };
  445. static const u8 extended_capabilities[] = {
  446. 0, 0, 0, 0, 0, 0, 0,
  447. WLAN_EXT_CAPA8_OPMODE_NOTIF,
  448. };
  449. struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
  450. const struct ieee80211_ops *ops)
  451. {
  452. struct ieee80211_local *local;
  453. int priv_size, i;
  454. struct wiphy *wiphy;
  455. bool use_chanctx;
  456. if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
  457. !ops->add_interface || !ops->remove_interface ||
  458. !ops->configure_filter))
  459. return NULL;
  460. if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
  461. return NULL;
  462. /* check all or no channel context operations exist */
  463. i = !!ops->add_chanctx + !!ops->remove_chanctx +
  464. !!ops->change_chanctx + !!ops->assign_vif_chanctx +
  465. !!ops->unassign_vif_chanctx;
  466. if (WARN_ON(i != 0 && i != 5))
  467. return NULL;
  468. use_chanctx = i == 5;
  469. /* Ensure 32-byte alignment of our private data and hw private data.
  470. * We use the wiphy priv data for both our ieee80211_local and for
  471. * the driver's private data
  472. *
  473. * In memory it'll be like this:
  474. *
  475. * +-------------------------+
  476. * | struct wiphy |
  477. * +-------------------------+
  478. * | struct ieee80211_local |
  479. * +-------------------------+
  480. * | driver's private data |
  481. * +-------------------------+
  482. *
  483. */
  484. priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
  485. wiphy = wiphy_new(&mac80211_config_ops, priv_size);
  486. if (!wiphy)
  487. return NULL;
  488. wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
  489. wiphy->privid = mac80211_wiphy_privid;
  490. wiphy->flags |= WIPHY_FLAG_NETNS_OK |
  491. WIPHY_FLAG_4ADDR_AP |
  492. WIPHY_FLAG_4ADDR_STATION |
  493. WIPHY_FLAG_REPORTS_OBSS |
  494. WIPHY_FLAG_OFFCHAN_TX;
  495. wiphy->extended_capabilities = extended_capabilities;
  496. wiphy->extended_capabilities_mask = extended_capabilities;
  497. wiphy->extended_capabilities_len = ARRAY_SIZE(extended_capabilities);
  498. if (ops->remain_on_channel)
  499. wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
  500. wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
  501. NL80211_FEATURE_SAE |
  502. NL80211_FEATURE_HT_IBSS |
  503. NL80211_FEATURE_VIF_TXPOWER;
  504. if (!ops->hw_scan)
  505. wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
  506. NL80211_FEATURE_AP_SCAN;
  507. if (!ops->set_key)
  508. wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
  509. wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
  510. local = wiphy_priv(wiphy);
  511. local->hw.wiphy = wiphy;
  512. local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
  513. local->ops = ops;
  514. local->use_chanctx = use_chanctx;
  515. /* set up some defaults */
  516. local->hw.queues = 1;
  517. local->hw.max_rates = 1;
  518. local->hw.max_report_rates = 0;
  519. local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
  520. local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
  521. local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
  522. local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
  523. local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
  524. local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
  525. IEEE80211_RADIOTAP_MCS_HAVE_GI |
  526. IEEE80211_RADIOTAP_MCS_HAVE_BW;
  527. local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
  528. IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
  529. local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
  530. wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
  531. wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
  532. INIT_LIST_HEAD(&local->interfaces);
  533. __hw_addr_init(&local->mc_list);
  534. mutex_init(&local->iflist_mtx);
  535. mutex_init(&local->mtx);
  536. mutex_init(&local->key_mtx);
  537. spin_lock_init(&local->filter_lock);
  538. spin_lock_init(&local->rx_path_lock);
  539. spin_lock_init(&local->queue_stop_reason_lock);
  540. INIT_LIST_HEAD(&local->chanctx_list);
  541. mutex_init(&local->chanctx_mtx);
  542. INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
  543. INIT_WORK(&local->restart_work, ieee80211_restart_work);
  544. INIT_WORK(&local->radar_detected_work,
  545. ieee80211_dfs_radar_detected_work);
  546. INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
  547. local->smps_mode = IEEE80211_SMPS_OFF;
  548. INIT_WORK(&local->dynamic_ps_enable_work,
  549. ieee80211_dynamic_ps_enable_work);
  550. INIT_WORK(&local->dynamic_ps_disable_work,
  551. ieee80211_dynamic_ps_disable_work);
  552. setup_timer(&local->dynamic_ps_timer,
  553. ieee80211_dynamic_ps_timer, (unsigned long) local);
  554. INIT_WORK(&local->sched_scan_stopped_work,
  555. ieee80211_sched_scan_stopped_work);
  556. spin_lock_init(&local->ack_status_lock);
  557. idr_init(&local->ack_status_frames);
  558. sta_info_init(local);
  559. for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
  560. skb_queue_head_init(&local->pending[i]);
  561. atomic_set(&local->agg_queue_stop[i], 0);
  562. }
  563. tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
  564. (unsigned long)local);
  565. tasklet_init(&local->tasklet,
  566. ieee80211_tasklet_handler,
  567. (unsigned long) local);
  568. skb_queue_head_init(&local->skb_queue);
  569. skb_queue_head_init(&local->skb_queue_unreliable);
  570. /* init dummy netdev for use w/ NAPI */
  571. init_dummy_netdev(&local->napi_dev);
  572. ieee80211_led_names(local);
  573. ieee80211_roc_setup(local);
  574. return &local->hw;
  575. }
  576. EXPORT_SYMBOL(ieee80211_alloc_hw);
  577. int ieee80211_register_hw(struct ieee80211_hw *hw)
  578. {
  579. struct ieee80211_local *local = hw_to_local(hw);
  580. int result, i;
  581. enum ieee80211_band band;
  582. int channels, max_bitrates;
  583. bool supp_ht, supp_vht;
  584. netdev_features_t feature_whitelist;
  585. static const u32 cipher_suites[] = {
  586. /* keep WEP first, it may be removed below */
  587. WLAN_CIPHER_SUITE_WEP40,
  588. WLAN_CIPHER_SUITE_WEP104,
  589. WLAN_CIPHER_SUITE_TKIP,
  590. WLAN_CIPHER_SUITE_CCMP,
  591. /* keep last -- depends on hw flags! */
  592. WLAN_CIPHER_SUITE_AES_CMAC
  593. };
  594. if (hw->flags & IEEE80211_HW_QUEUE_CONTROL &&
  595. (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
  596. local->hw.offchannel_tx_hw_queue >= local->hw.queues))
  597. return -EINVAL;
  598. #ifdef CONFIG_PM
  599. if ((hw->wiphy->wowlan.flags || hw->wiphy->wowlan.n_patterns) &&
  600. (!local->ops->suspend || !local->ops->resume))
  601. return -EINVAL;
  602. #endif
  603. if (!local->use_chanctx) {
  604. for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
  605. const struct ieee80211_iface_combination *comb;
  606. comb = &local->hw.wiphy->iface_combinations[i];
  607. if (comb->num_different_channels > 1)
  608. return -EINVAL;
  609. }
  610. } else {
  611. /*
  612. * WDS is currently prohibited when channel contexts are used
  613. * because there's no clear definition of which channel WDS
  614. * type interfaces use
  615. */
  616. if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
  617. return -EINVAL;
  618. /* DFS currently not supported with channel context drivers */
  619. for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
  620. const struct ieee80211_iface_combination *comb;
  621. comb = &local->hw.wiphy->iface_combinations[i];
  622. if (comb->radar_detect_widths)
  623. return -EINVAL;
  624. }
  625. }
  626. /* Only HW csum features are currently compatible with mac80211 */
  627. feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
  628. NETIF_F_HW_CSUM;
  629. if (WARN_ON(hw->netdev_features & ~feature_whitelist))
  630. return -EINVAL;
  631. if (hw->max_report_rates == 0)
  632. hw->max_report_rates = hw->max_rates;
  633. local->rx_chains = 1;
  634. /*
  635. * generic code guarantees at least one band,
  636. * set this very early because much code assumes
  637. * that hw.conf.channel is assigned
  638. */
  639. channels = 0;
  640. max_bitrates = 0;
  641. supp_ht = false;
  642. supp_vht = false;
  643. for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
  644. struct ieee80211_supported_band *sband;
  645. sband = local->hw.wiphy->bands[band];
  646. if (!sband)
  647. continue;
  648. if (!local->use_chanctx && !local->_oper_channel) {
  649. /* init channel we're on */
  650. local->hw.conf.channel =
  651. local->_oper_channel = &sband->channels[0];
  652. local->hw.conf.channel_type = NL80211_CHAN_NO_HT;
  653. }
  654. cfg80211_chandef_create(&local->monitor_chandef,
  655. &sband->channels[0],
  656. NL80211_CHAN_NO_HT);
  657. channels += sband->n_channels;
  658. if (max_bitrates < sband->n_bitrates)
  659. max_bitrates = sband->n_bitrates;
  660. supp_ht = supp_ht || sband->ht_cap.ht_supported;
  661. supp_vht = supp_vht || sband->vht_cap.vht_supported;
  662. if (sband->ht_cap.ht_supported)
  663. local->rx_chains =
  664. max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
  665. local->rx_chains);
  666. /* TODO: consider VHT for RX chains, hopefully it's the same */
  667. }
  668. local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
  669. sizeof(void *) * channels, GFP_KERNEL);
  670. if (!local->int_scan_req)
  671. return -ENOMEM;
  672. for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
  673. if (!local->hw.wiphy->bands[band])
  674. continue;
  675. local->int_scan_req->rates[band] = (u32) -1;
  676. }
  677. /* if low-level driver supports AP, we also support VLAN */
  678. if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
  679. hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
  680. hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
  681. }
  682. /* mac80211 always supports monitor */
  683. hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
  684. hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
  685. /* mac80211 doesn't support more than one IBSS interface right now */
  686. for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
  687. const struct ieee80211_iface_combination *c;
  688. int j;
  689. c = &hw->wiphy->iface_combinations[i];
  690. for (j = 0; j < c->n_limits; j++)
  691. if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
  692. c->limits[j].max > 1)
  693. return -EINVAL;
  694. }
  695. #ifndef CONFIG_MAC80211_MESH
  696. /* mesh depends on Kconfig, but drivers should set it if they want */
  697. local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
  698. #endif
  699. /* if the underlying driver supports mesh, mac80211 will (at least)
  700. * provide routing of mesh authentication frames to userspace */
  701. if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
  702. local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
  703. /* mac80211 supports control port protocol changing */
  704. local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
  705. if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
  706. local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
  707. else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
  708. local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
  709. WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
  710. && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
  711. "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
  712. /*
  713. * Calculate scan IE length -- we need this to alloc
  714. * memory and to subtract from the driver limit. It
  715. * includes the DS Params, (extended) supported rates, and HT
  716. * information -- SSID is the driver's responsibility.
  717. */
  718. local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
  719. 3 /* DS Params */;
  720. if (supp_ht)
  721. local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
  722. if (supp_vht) {
  723. local->scan_ies_len +=
  724. 2 + sizeof(struct ieee80211_vht_cap);
  725. /*
  726. * (for now at least), drivers wanting to use VHT must
  727. * support channel contexts, as they contain all the
  728. * necessary VHT information and the global hw config
  729. * doesn't (yet)
  730. */
  731. if (WARN_ON(!local->use_chanctx)) {
  732. result = -EINVAL;
  733. goto fail_wiphy_register;
  734. }
  735. }
  736. if (!local->ops->hw_scan) {
  737. /* For hw_scan, driver needs to set these up. */
  738. local->hw.wiphy->max_scan_ssids = 4;
  739. local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
  740. }
  741. /*
  742. * If the driver supports any scan IEs, then assume the
  743. * limit includes the IEs mac80211 will add, otherwise
  744. * leave it at zero and let the driver sort it out; we
  745. * still pass our IEs to the driver but userspace will
  746. * not be allowed to in that case.
  747. */
  748. if (local->hw.wiphy->max_scan_ie_len)
  749. local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
  750. /* Set up cipher suites unless driver already did */
  751. if (!local->hw.wiphy->cipher_suites) {
  752. local->hw.wiphy->cipher_suites = cipher_suites;
  753. local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
  754. if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE))
  755. local->hw.wiphy->n_cipher_suites--;
  756. }
  757. if (IS_ERR(local->wep_tx_tfm) || IS_ERR(local->wep_rx_tfm)) {
  758. if (local->hw.wiphy->cipher_suites == cipher_suites) {
  759. local->hw.wiphy->cipher_suites += 2;
  760. local->hw.wiphy->n_cipher_suites -= 2;
  761. } else {
  762. u32 *suites;
  763. int r, w = 0;
  764. /* Filter out WEP */
  765. suites = kmemdup(
  766. local->hw.wiphy->cipher_suites,
  767. sizeof(u32) * local->hw.wiphy->n_cipher_suites,
  768. GFP_KERNEL);
  769. if (!suites) {
  770. result = -ENOMEM;
  771. goto fail_wiphy_register;
  772. }
  773. for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
  774. u32 suite = local->hw.wiphy->cipher_suites[r];
  775. if (suite == WLAN_CIPHER_SUITE_WEP40 ||
  776. suite == WLAN_CIPHER_SUITE_WEP104)
  777. continue;
  778. suites[w++] = suite;
  779. }
  780. local->hw.wiphy->cipher_suites = suites;
  781. local->hw.wiphy->n_cipher_suites = w;
  782. local->wiphy_ciphers_allocated = true;
  783. }
  784. }
  785. if (!local->ops->remain_on_channel)
  786. local->hw.wiphy->max_remain_on_channel_duration = 5000;
  787. if (local->ops->sched_scan_start)
  788. local->hw.wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
  789. /* mac80211 based drivers don't support internal TDLS setup */
  790. if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
  791. local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
  792. result = wiphy_register(local->hw.wiphy);
  793. if (result < 0)
  794. goto fail_wiphy_register;
  795. /*
  796. * We use the number of queues for feature tests (QoS, HT) internally
  797. * so restrict them appropriately.
  798. */
  799. if (hw->queues > IEEE80211_MAX_QUEUES)
  800. hw->queues = IEEE80211_MAX_QUEUES;
  801. local->workqueue =
  802. alloc_ordered_workqueue(wiphy_name(local->hw.wiphy), 0);
  803. if (!local->workqueue) {
  804. result = -ENOMEM;
  805. goto fail_workqueue;
  806. }
  807. /*
  808. * The hardware needs headroom for sending the frame,
  809. * and we need some headroom for passing the frame to monitor
  810. * interfaces, but never both at the same time.
  811. */
  812. local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
  813. IEEE80211_TX_STATUS_HEADROOM);
  814. debugfs_hw_add(local);
  815. /*
  816. * if the driver doesn't specify a max listen interval we
  817. * use 5 which should be a safe default
  818. */
  819. if (local->hw.max_listen_interval == 0)
  820. local->hw.max_listen_interval = 5;
  821. local->hw.conf.listen_interval = local->hw.max_listen_interval;
  822. local->dynamic_ps_forced_timeout = -1;
  823. result = ieee80211_wep_init(local);
  824. if (result < 0)
  825. wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
  826. result);
  827. ieee80211_led_init(local);
  828. rtnl_lock();
  829. result = ieee80211_init_rate_ctrl_alg(local,
  830. hw->rate_control_algorithm);
  831. if (result < 0) {
  832. wiphy_debug(local->hw.wiphy,
  833. "Failed to initialize rate control algorithm\n");
  834. goto fail_rate;
  835. }
  836. /* add one default STA interface if supported */
  837. if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) {
  838. result = ieee80211_if_add(local, "wlan%d", NULL,
  839. NL80211_IFTYPE_STATION, NULL);
  840. if (result)
  841. wiphy_warn(local->hw.wiphy,
  842. "Failed to add default virtual iface\n");
  843. }
  844. rtnl_unlock();
  845. local->network_latency_notifier.notifier_call =
  846. ieee80211_max_network_latency;
  847. result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
  848. &local->network_latency_notifier);
  849. if (result) {
  850. rtnl_lock();
  851. goto fail_pm_qos;
  852. }
  853. #ifdef CONFIG_INET
  854. local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
  855. result = register_inetaddr_notifier(&local->ifa_notifier);
  856. if (result)
  857. goto fail_ifa;
  858. #endif
  859. #if IS_ENABLED(CONFIG_IPV6)
  860. local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
  861. result = register_inet6addr_notifier(&local->ifa6_notifier);
  862. if (result)
  863. goto fail_ifa6;
  864. #endif
  865. netif_napi_add(&local->napi_dev, &local->napi, ieee80211_napi_poll,
  866. local->hw.napi_weight);
  867. return 0;
  868. #if IS_ENABLED(CONFIG_IPV6)
  869. fail_ifa6:
  870. #ifdef CONFIG_INET
  871. unregister_inetaddr_notifier(&local->ifa_notifier);
  872. #endif
  873. #endif
  874. #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
  875. fail_ifa:
  876. pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
  877. &local->network_latency_notifier);
  878. rtnl_lock();
  879. #endif
  880. fail_pm_qos:
  881. ieee80211_led_exit(local);
  882. ieee80211_remove_interfaces(local);
  883. fail_rate:
  884. rtnl_unlock();
  885. ieee80211_wep_free(local);
  886. sta_info_stop(local);
  887. destroy_workqueue(local->workqueue);
  888. fail_workqueue:
  889. wiphy_unregister(local->hw.wiphy);
  890. fail_wiphy_register:
  891. if (local->wiphy_ciphers_allocated)
  892. kfree(local->hw.wiphy->cipher_suites);
  893. kfree(local->int_scan_req);
  894. return result;
  895. }
  896. EXPORT_SYMBOL(ieee80211_register_hw);
  897. void ieee80211_unregister_hw(struct ieee80211_hw *hw)
  898. {
  899. struct ieee80211_local *local = hw_to_local(hw);
  900. tasklet_kill(&local->tx_pending_tasklet);
  901. tasklet_kill(&local->tasklet);
  902. pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
  903. &local->network_latency_notifier);
  904. #ifdef CONFIG_INET
  905. unregister_inetaddr_notifier(&local->ifa_notifier);
  906. #endif
  907. #if IS_ENABLED(CONFIG_IPV6)
  908. unregister_inet6addr_notifier(&local->ifa6_notifier);
  909. #endif
  910. rtnl_lock();
  911. /*
  912. * At this point, interface list manipulations are fine
  913. * because the driver cannot be handing us frames any
  914. * more and the tasklet is killed.
  915. */
  916. ieee80211_remove_interfaces(local);
  917. rtnl_unlock();
  918. cancel_work_sync(&local->restart_work);
  919. cancel_work_sync(&local->reconfig_filter);
  920. ieee80211_clear_tx_pending(local);
  921. rate_control_deinitialize(local);
  922. if (skb_queue_len(&local->skb_queue) ||
  923. skb_queue_len(&local->skb_queue_unreliable))
  924. wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
  925. skb_queue_purge(&local->skb_queue);
  926. skb_queue_purge(&local->skb_queue_unreliable);
  927. destroy_workqueue(local->workqueue);
  928. wiphy_unregister(local->hw.wiphy);
  929. sta_info_stop(local);
  930. ieee80211_wep_free(local);
  931. ieee80211_led_exit(local);
  932. kfree(local->int_scan_req);
  933. }
  934. EXPORT_SYMBOL(ieee80211_unregister_hw);
  935. static int ieee80211_free_ack_frame(int id, void *p, void *data)
  936. {
  937. WARN_ONCE(1, "Have pending ack frames!\n");
  938. kfree_skb(p);
  939. return 0;
  940. }
  941. void ieee80211_free_hw(struct ieee80211_hw *hw)
  942. {
  943. struct ieee80211_local *local = hw_to_local(hw);
  944. mutex_destroy(&local->iflist_mtx);
  945. mutex_destroy(&local->mtx);
  946. if (local->wiphy_ciphers_allocated)
  947. kfree(local->hw.wiphy->cipher_suites);
  948. idr_for_each(&local->ack_status_frames,
  949. ieee80211_free_ack_frame, NULL);
  950. idr_destroy(&local->ack_status_frames);
  951. wiphy_free(local->hw.wiphy);
  952. }
  953. EXPORT_SYMBOL(ieee80211_free_hw);
  954. static int __init ieee80211_init(void)
  955. {
  956. struct sk_buff *skb;
  957. int ret;
  958. BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
  959. BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
  960. IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
  961. ret = rc80211_minstrel_init();
  962. if (ret)
  963. return ret;
  964. ret = rc80211_minstrel_ht_init();
  965. if (ret)
  966. goto err_minstrel;
  967. ret = rc80211_pid_init();
  968. if (ret)
  969. goto err_pid;
  970. ret = ieee80211_iface_init();
  971. if (ret)
  972. goto err_netdev;
  973. return 0;
  974. err_netdev:
  975. rc80211_pid_exit();
  976. err_pid:
  977. rc80211_minstrel_ht_exit();
  978. err_minstrel:
  979. rc80211_minstrel_exit();
  980. return ret;
  981. }
  982. static void __exit ieee80211_exit(void)
  983. {
  984. rc80211_pid_exit();
  985. rc80211_minstrel_ht_exit();
  986. rc80211_minstrel_exit();
  987. ieee80211s_stop();
  988. ieee80211_iface_exit();
  989. rcu_barrier();
  990. }
  991. subsys_initcall(ieee80211_init);
  992. module_exit(ieee80211_exit);
  993. MODULE_DESCRIPTION("IEEE 802.11 subsystem");
  994. MODULE_LICENSE("GPL");