Commit | Line | Data |
---|---|---|
704232c2 JB |
1 | /* |
2 | * This is the linux wireless configuration interface. | |
3 | * | |
5f2aa25e | 4 | * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net> |
704232c2 JB |
5 | */ |
6 | ||
7 | #include <linux/if.h> | |
8 | #include <linux/module.h> | |
9 | #include <linux/err.h> | |
704232c2 | 10 | #include <linux/list.h> |
5a0e3ad6 | 11 | #include <linux/slab.h> |
704232c2 JB |
12 | #include <linux/nl80211.h> |
13 | #include <linux/debugfs.h> | |
14 | #include <linux/notifier.h> | |
15 | #include <linux/device.h> | |
16a832e7 | 16 | #include <linux/etherdevice.h> |
1f87f7d3 | 17 | #include <linux/rtnetlink.h> |
d43c36dc | 18 | #include <linux/sched.h> |
704232c2 JB |
19 | #include <net/genetlink.h> |
20 | #include <net/cfg80211.h> | |
55682965 | 21 | #include "nl80211.h" |
704232c2 JB |
22 | #include "core.h" |
23 | #include "sysfs.h" | |
1ac61302 | 24 | #include "debugfs.h" |
a9a11622 | 25 | #include "wext-compat.h" |
4890e3be | 26 | #include "ethtool.h" |
704232c2 JB |
27 | |
28 | /* name for sysfs, %d is appended */ | |
29 | #define PHY_NAME "phy" | |
30 | ||
31 | MODULE_AUTHOR("Johannes Berg"); | |
32 | MODULE_LICENSE("GPL"); | |
33 | MODULE_DESCRIPTION("wireless configuration support"); | |
34 | ||
5f2aa25e | 35 | /* RCU-protected (and cfg80211_mutex for writers) */ |
79c97e97 | 36 | LIST_HEAD(cfg80211_rdev_list); |
f5ea9120 | 37 | int cfg80211_rdev_list_generation; |
a1794390 | 38 | |
a1794390 | 39 | DEFINE_MUTEX(cfg80211_mutex); |
704232c2 JB |
40 | |
41 | /* for debugfs */ | |
42 | static struct dentry *ieee80211_debugfs_dir; | |
43 | ||
e60d7443 AB |
44 | /* for the cleanup, scan and event works */ |
45 | struct workqueue_struct *cfg80211_wq; | |
46 | ||
806a9e39 | 47 | /* requires cfg80211_mutex to be held! */ |
79c97e97 | 48 | struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx) |
55682965 | 49 | { |
79c97e97 | 50 | struct cfg80211_registered_device *result = NULL, *rdev; |
55682965 | 51 | |
85fd129a LR |
52 | if (!wiphy_idx_valid(wiphy_idx)) |
53 | return NULL; | |
54 | ||
761cf7ec LR |
55 | assert_cfg80211_lock(); |
56 | ||
79c97e97 JB |
57 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
58 | if (rdev->wiphy_idx == wiphy_idx) { | |
59 | result = rdev; | |
55682965 JB |
60 | break; |
61 | } | |
62 | } | |
63 | ||
64 | return result; | |
65 | } | |
66 | ||
806a9e39 LR |
67 | int get_wiphy_idx(struct wiphy *wiphy) |
68 | { | |
79c97e97 | 69 | struct cfg80211_registered_device *rdev; |
806a9e39 LR |
70 | if (!wiphy) |
71 | return WIPHY_IDX_STALE; | |
79c97e97 JB |
72 | rdev = wiphy_to_dev(wiphy); |
73 | return rdev->wiphy_idx; | |
806a9e39 LR |
74 | } |
75 | ||
79c97e97 | 76 | /* requires cfg80211_rdev_mutex to be held! */ |
806a9e39 LR |
77 | struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx) |
78 | { | |
79c97e97 | 79 | struct cfg80211_registered_device *rdev; |
806a9e39 LR |
80 | |
81 | if (!wiphy_idx_valid(wiphy_idx)) | |
82 | return NULL; | |
83 | ||
84 | assert_cfg80211_lock(); | |
85 | ||
79c97e97 JB |
86 | rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx); |
87 | if (!rdev) | |
806a9e39 | 88 | return NULL; |
79c97e97 | 89 | return &rdev->wiphy; |
806a9e39 LR |
90 | } |
91 | ||
a1794390 | 92 | /* requires cfg80211_mutex to be held! */ |
4bbf4d56 | 93 | struct cfg80211_registered_device * |
79c97e97 | 94 | __cfg80211_rdev_from_info(struct genl_info *info) |
55682965 JB |
95 | { |
96 | int ifindex; | |
b5850a7a | 97 | struct cfg80211_registered_device *bywiphyidx = NULL, *byifidx = NULL; |
55682965 JB |
98 | struct net_device *dev; |
99 | int err = -EINVAL; | |
100 | ||
761cf7ec LR |
101 | assert_cfg80211_lock(); |
102 | ||
55682965 | 103 | if (info->attrs[NL80211_ATTR_WIPHY]) { |
79c97e97 | 104 | bywiphyidx = cfg80211_rdev_by_wiphy_idx( |
55682965 JB |
105 | nla_get_u32(info->attrs[NL80211_ATTR_WIPHY])); |
106 | err = -ENODEV; | |
107 | } | |
108 | ||
109 | if (info->attrs[NL80211_ATTR_IFINDEX]) { | |
110 | ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]); | |
463d0183 | 111 | dev = dev_get_by_index(genl_info_net(info), ifindex); |
55682965 JB |
112 | if (dev) { |
113 | if (dev->ieee80211_ptr) | |
114 | byifidx = | |
115 | wiphy_to_dev(dev->ieee80211_ptr->wiphy); | |
116 | dev_put(dev); | |
117 | } | |
118 | err = -ENODEV; | |
119 | } | |
120 | ||
b5850a7a LR |
121 | if (bywiphyidx && byifidx) { |
122 | if (bywiphyidx != byifidx) | |
55682965 JB |
123 | return ERR_PTR(-EINVAL); |
124 | else | |
b5850a7a | 125 | return bywiphyidx; /* == byifidx */ |
55682965 | 126 | } |
b5850a7a LR |
127 | if (bywiphyidx) |
128 | return bywiphyidx; | |
55682965 JB |
129 | |
130 | if (byifidx) | |
131 | return byifidx; | |
132 | ||
133 | return ERR_PTR(err); | |
134 | } | |
135 | ||
136 | struct cfg80211_registered_device * | |
137 | cfg80211_get_dev_from_info(struct genl_info *info) | |
138 | { | |
79c97e97 | 139 | struct cfg80211_registered_device *rdev; |
55682965 | 140 | |
a1794390 | 141 | mutex_lock(&cfg80211_mutex); |
79c97e97 | 142 | rdev = __cfg80211_rdev_from_info(info); |
55682965 JB |
143 | |
144 | /* if it is not an error we grab the lock on | |
145 | * it to assure it won't be going away while | |
146 | * we operate on it */ | |
79c97e97 JB |
147 | if (!IS_ERR(rdev)) |
148 | mutex_lock(&rdev->mtx); | |
55682965 | 149 | |
a1794390 | 150 | mutex_unlock(&cfg80211_mutex); |
55682965 | 151 | |
79c97e97 | 152 | return rdev; |
55682965 JB |
153 | } |
154 | ||
155 | struct cfg80211_registered_device * | |
463d0183 | 156 | cfg80211_get_dev_from_ifindex(struct net *net, int ifindex) |
55682965 | 157 | { |
79c97e97 | 158 | struct cfg80211_registered_device *rdev = ERR_PTR(-ENODEV); |
55682965 JB |
159 | struct net_device *dev; |
160 | ||
a1794390 | 161 | mutex_lock(&cfg80211_mutex); |
463d0183 | 162 | dev = dev_get_by_index(net, ifindex); |
55682965 JB |
163 | if (!dev) |
164 | goto out; | |
165 | if (dev->ieee80211_ptr) { | |
79c97e97 JB |
166 | rdev = wiphy_to_dev(dev->ieee80211_ptr->wiphy); |
167 | mutex_lock(&rdev->mtx); | |
55682965 | 168 | } else |
79c97e97 | 169 | rdev = ERR_PTR(-ENODEV); |
55682965 JB |
170 | dev_put(dev); |
171 | out: | |
a1794390 | 172 | mutex_unlock(&cfg80211_mutex); |
79c97e97 | 173 | return rdev; |
55682965 JB |
174 | } |
175 | ||
4bbf4d56 | 176 | /* requires cfg80211_mutex to be held */ |
55682965 JB |
177 | int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, |
178 | char *newname) | |
179 | { | |
79c97e97 | 180 | struct cfg80211_registered_device *rdev2; |
5a254ffe | 181 | int result; |
55682965 | 182 | |
4bbf4d56 | 183 | assert_cfg80211_lock(); |
2940bb69 | 184 | |
2940bb69 | 185 | /* Ignore nop renames */ |
2940bb69 | 186 | if (strcmp(newname, dev_name(&rdev->wiphy.dev)) == 0) |
4bbf4d56 | 187 | return 0; |
2940bb69 EB |
188 | |
189 | /* Ensure another device does not already have this name. */ | |
79c97e97 JB |
190 | list_for_each_entry(rdev2, &cfg80211_rdev_list, list) |
191 | if (strcmp(newname, dev_name(&rdev2->wiphy.dev)) == 0) | |
5a254ffe | 192 | return -EEXIST; |
55682965 | 193 | |
55682965 JB |
194 | result = device_rename(&rdev->wiphy.dev, newname); |
195 | if (result) | |
4bbf4d56 | 196 | return result; |
55682965 | 197 | |
33c0360b JB |
198 | if (rdev->wiphy.debugfsdir && |
199 | !debugfs_rename(rdev->wiphy.debugfsdir->d_parent, | |
55682965 JB |
200 | rdev->wiphy.debugfsdir, |
201 | rdev->wiphy.debugfsdir->d_parent, | |
202 | newname)) | |
203 | printk(KERN_ERR "cfg80211: failed to rename debugfs dir to %s!\n", | |
204 | newname); | |
205 | ||
4bbf4d56 | 206 | nl80211_notify_dev_rename(rdev); |
55682965 | 207 | |
4bbf4d56 | 208 | return 0; |
55682965 JB |
209 | } |
210 | ||
463d0183 JB |
211 | int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, |
212 | struct net *net) | |
213 | { | |
214 | struct wireless_dev *wdev; | |
215 | int err = 0; | |
216 | ||
5be83de5 | 217 | if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK)) |
463d0183 JB |
218 | return -EOPNOTSUPP; |
219 | ||
220 | list_for_each_entry(wdev, &rdev->netdev_list, list) { | |
221 | wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL; | |
222 | err = dev_change_net_namespace(wdev->netdev, net, "wlan%d"); | |
223 | if (err) | |
224 | break; | |
225 | wdev->netdev->features |= NETIF_F_NETNS_LOCAL; | |
226 | } | |
227 | ||
228 | if (err) { | |
229 | /* failed -- clean up to old netns */ | |
230 | net = wiphy_net(&rdev->wiphy); | |
231 | ||
232 | list_for_each_entry_continue_reverse(wdev, &rdev->netdev_list, | |
233 | list) { | |
234 | wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL; | |
235 | err = dev_change_net_namespace(wdev->netdev, net, | |
236 | "wlan%d"); | |
237 | WARN_ON(err); | |
238 | wdev->netdev->features |= NETIF_F_NETNS_LOCAL; | |
239 | } | |
04600794 JB |
240 | |
241 | return err; | |
463d0183 JB |
242 | } |
243 | ||
244 | wiphy_net_set(&rdev->wiphy, net); | |
245 | ||
04600794 JB |
246 | err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev)); |
247 | WARN_ON(err); | |
248 | ||
249 | return 0; | |
463d0183 JB |
250 | } |
251 | ||
1f87f7d3 JB |
252 | static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data) |
253 | { | |
79c97e97 | 254 | struct cfg80211_registered_device *rdev = data; |
1f87f7d3 | 255 | |
79c97e97 | 256 | rdev->ops->rfkill_poll(&rdev->wiphy); |
1f87f7d3 JB |
257 | } |
258 | ||
259 | static int cfg80211_rfkill_set_block(void *data, bool blocked) | |
260 | { | |
79c97e97 | 261 | struct cfg80211_registered_device *rdev = data; |
1f87f7d3 JB |
262 | struct wireless_dev *wdev; |
263 | ||
264 | if (!blocked) | |
265 | return 0; | |
266 | ||
267 | rtnl_lock(); | |
79c97e97 | 268 | mutex_lock(&rdev->devlist_mtx); |
1f87f7d3 | 269 | |
79c97e97 | 270 | list_for_each_entry(wdev, &rdev->netdev_list, list) |
1f87f7d3 JB |
271 | dev_close(wdev->netdev); |
272 | ||
79c97e97 | 273 | mutex_unlock(&rdev->devlist_mtx); |
1f87f7d3 JB |
274 | rtnl_unlock(); |
275 | ||
276 | return 0; | |
277 | } | |
278 | ||
279 | static void cfg80211_rfkill_sync_work(struct work_struct *work) | |
280 | { | |
79c97e97 | 281 | struct cfg80211_registered_device *rdev; |
1f87f7d3 | 282 | |
79c97e97 JB |
283 | rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync); |
284 | cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill)); | |
1f87f7d3 JB |
285 | } |
286 | ||
667503dd JB |
287 | static void cfg80211_event_work(struct work_struct *work) |
288 | { | |
289 | struct cfg80211_registered_device *rdev; | |
667503dd JB |
290 | |
291 | rdev = container_of(work, struct cfg80211_registered_device, | |
292 | event_work); | |
293 | ||
294 | rtnl_lock(); | |
295 | cfg80211_lock_rdev(rdev); | |
667503dd | 296 | |
3d54d255 | 297 | cfg80211_process_rdev_events(rdev); |
667503dd JB |
298 | cfg80211_unlock_rdev(rdev); |
299 | rtnl_unlock(); | |
300 | } | |
301 | ||
704232c2 JB |
302 | /* exported functions */ |
303 | ||
3dcf670b | 304 | struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv) |
704232c2 | 305 | { |
638af073 | 306 | static int wiphy_counter; |
5a254ffe BG |
307 | int i; |
308 | struct cfg80211_registered_device *rdev, *rdev2; | |
704232c2 | 309 | int alloc_size; |
5a254ffe BG |
310 | char nname[IFNAMSIZ + 1]; |
311 | bool found = false; | |
704232c2 | 312 | |
0b20633d JB |
313 | WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key)); |
314 | WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc)); | |
315 | WARN_ON(ops->connect && !ops->disconnect); | |
316 | WARN_ON(ops->join_ibss && !ops->leave_ibss); | |
317 | WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf); | |
318 | WARN_ON(ops->add_station && !ops->del_station); | |
319 | WARN_ON(ops->add_mpath && !ops->del_mpath); | |
41ade00f | 320 | |
79c97e97 | 321 | alloc_size = sizeof(*rdev) + sizeof_priv; |
704232c2 | 322 | |
79c97e97 JB |
323 | rdev = kzalloc(alloc_size, GFP_KERNEL); |
324 | if (!rdev) | |
704232c2 JB |
325 | return NULL; |
326 | ||
79c97e97 | 327 | rdev->ops = ops; |
704232c2 | 328 | |
a1794390 | 329 | mutex_lock(&cfg80211_mutex); |
704232c2 | 330 | |
79c97e97 | 331 | rdev->wiphy_idx = wiphy_counter++; |
a4d73ee1 | 332 | |
79c97e97 | 333 | if (unlikely(!wiphy_idx_valid(rdev->wiphy_idx))) { |
638af073 | 334 | wiphy_counter--; |
5a254ffe BG |
335 | goto too_many_devs; |
336 | } | |
337 | ||
338 | /* 64k wiphy devices is enough for anyone! */ | |
339 | for (i = 0; i < 0xFFFF; i++) { | |
340 | found = false; | |
341 | snprintf(nname, sizeof(nname)-1, PHY_NAME "%d", i); | |
342 | nname[sizeof(nname)-1] = 0; | |
343 | list_for_each_entry(rdev2, &cfg80211_rdev_list, list) | |
344 | if (strcmp(nname, dev_name(&rdev2->wiphy.dev)) == 0) { | |
345 | found = true; | |
346 | break; | |
347 | } | |
348 | ||
349 | if (!found) | |
350 | break; | |
351 | } | |
352 | ||
353 | if (unlikely(found)) { | |
354 | too_many_devs: | |
a1794390 | 355 | mutex_unlock(&cfg80211_mutex); |
5a254ffe | 356 | /* ugh, too many devices already! */ |
79c97e97 | 357 | kfree(rdev); |
704232c2 JB |
358 | return NULL; |
359 | } | |
704232c2 JB |
360 | |
361 | /* give it a proper name */ | |
5a254ffe BG |
362 | dev_set_name(&rdev->wiphy.dev, "%s", nname); |
363 | ||
364 | mutex_unlock(&cfg80211_mutex); | |
79c97e97 JB |
365 | |
366 | mutex_init(&rdev->mtx); | |
367 | mutex_init(&rdev->devlist_mtx); | |
368 | INIT_LIST_HEAD(&rdev->netdev_list); | |
369 | spin_lock_init(&rdev->bss_lock); | |
370 | INIT_LIST_HEAD(&rdev->bss_list); | |
371 | INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done); | |
372 | ||
3d23e349 JB |
373 | #ifdef CONFIG_CFG80211_WEXT |
374 | rdev->wiphy.wext = &cfg80211_wext_handler; | |
375 | #endif | |
376 | ||
79c97e97 JB |
377 | device_initialize(&rdev->wiphy.dev); |
378 | rdev->wiphy.dev.class = &ieee80211_class; | |
379 | rdev->wiphy.dev.platform_data = rdev; | |
380 | ||
5be83de5 JB |
381 | #ifdef CONFIG_CFG80211_DEFAULT_PS |
382 | rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT; | |
383 | #endif | |
16cb9d42 | 384 | |
463d0183 JB |
385 | wiphy_net_set(&rdev->wiphy, &init_net); |
386 | ||
79c97e97 JB |
387 | rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block; |
388 | rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev), | |
389 | &rdev->wiphy.dev, RFKILL_TYPE_WLAN, | |
390 | &rdev->rfkill_ops, rdev); | |
391 | ||
392 | if (!rdev->rfkill) { | |
393 | kfree(rdev); | |
1f87f7d3 JB |
394 | return NULL; |
395 | } | |
396 | ||
79c97e97 JB |
397 | INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work); |
398 | INIT_WORK(&rdev->conn_work, cfg80211_conn_work); | |
399 | INIT_WORK(&rdev->event_work, cfg80211_event_work); | |
1f87f7d3 | 400 | |
ad002395 JB |
401 | init_waitqueue_head(&rdev->dev_wait); |
402 | ||
b9a5f8ca JM |
403 | /* |
404 | * Initialize wiphy parameters to IEEE 802.11 MIB default values. | |
405 | * Fragmentation and RTS threshold are disabled by default with the | |
406 | * special -1 value. | |
407 | */ | |
79c97e97 JB |
408 | rdev->wiphy.retry_short = 7; |
409 | rdev->wiphy.retry_long = 4; | |
410 | rdev->wiphy.frag_threshold = (u32) -1; | |
411 | rdev->wiphy.rts_threshold = (u32) -1; | |
81077e82 | 412 | rdev->wiphy.coverage_class = 0; |
b9a5f8ca | 413 | |
79c97e97 | 414 | return &rdev->wiphy; |
704232c2 JB |
415 | } |
416 | EXPORT_SYMBOL(wiphy_new); | |
417 | ||
418 | int wiphy_register(struct wiphy *wiphy) | |
419 | { | |
79c97e97 | 420 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
704232c2 | 421 | int res; |
8318d78a JB |
422 | enum ieee80211_band band; |
423 | struct ieee80211_supported_band *sband; | |
424 | bool have_band = false; | |
425 | int i; | |
f59ac048 LR |
426 | u16 ifmodes = wiphy->interface_modes; |
427 | ||
ef15aac6 JB |
428 | if (WARN_ON(wiphy->addresses && !wiphy->n_addresses)) |
429 | return -EINVAL; | |
430 | ||
431 | if (WARN_ON(wiphy->addresses && | |
432 | !is_zero_ether_addr(wiphy->perm_addr) && | |
433 | memcmp(wiphy->perm_addr, wiphy->addresses[0].addr, | |
434 | ETH_ALEN))) | |
435 | return -EINVAL; | |
436 | ||
437 | if (wiphy->addresses) | |
438 | memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN); | |
439 | ||
f59ac048 LR |
440 | /* sanity check ifmodes */ |
441 | WARN_ON(!ifmodes); | |
2e161f78 | 442 | ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1; |
f59ac048 LR |
443 | if (WARN_ON(ifmodes != wiphy->interface_modes)) |
444 | wiphy->interface_modes = ifmodes; | |
8318d78a JB |
445 | |
446 | /* sanity check supported bands/channels */ | |
447 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
448 | sband = wiphy->bands[band]; | |
449 | if (!sband) | |
450 | continue; | |
451 | ||
452 | sband->band = band; | |
453 | ||
881d948c JB |
454 | if (WARN_ON(!sband->n_channels || !sband->n_bitrates)) |
455 | return -EINVAL; | |
456 | ||
457 | /* | |
458 | * Since we use a u32 for rate bitmaps in | |
459 | * ieee80211_get_response_rate, we cannot | |
460 | * have more than 32 legacy rates. | |
461 | */ | |
462 | if (WARN_ON(sband->n_bitrates > 32)) | |
8318d78a | 463 | return -EINVAL; |
8318d78a JB |
464 | |
465 | for (i = 0; i < sband->n_channels; i++) { | |
466 | sband->channels[i].orig_flags = | |
467 | sband->channels[i].flags; | |
468 | sband->channels[i].orig_mag = | |
469 | sband->channels[i].max_antenna_gain; | |
470 | sband->channels[i].orig_mpwr = | |
471 | sband->channels[i].max_power; | |
472 | sband->channels[i].band = band; | |
473 | } | |
474 | ||
475 | have_band = true; | |
476 | } | |
477 | ||
478 | if (!have_band) { | |
479 | WARN_ON(1); | |
480 | return -EINVAL; | |
481 | } | |
482 | ||
483 | /* check and set up bitrates */ | |
484 | ieee80211_set_bitrate_flags(wiphy); | |
485 | ||
5a652052 MB |
486 | mutex_lock(&cfg80211_mutex); |
487 | ||
79c97e97 | 488 | res = device_add(&rdev->wiphy.dev); |
c3d34d5d JL |
489 | if (res) { |
490 | mutex_unlock(&cfg80211_mutex); | |
491 | return res; | |
492 | } | |
1f87f7d3 | 493 | |
2f0accc1 JB |
494 | /* set up regulatory info */ |
495 | wiphy_update_regulatory(wiphy, NL80211_REGDOM_SET_BY_CORE); | |
496 | ||
5f2aa25e | 497 | list_add_rcu(&rdev->list, &cfg80211_rdev_list); |
f5ea9120 | 498 | cfg80211_rdev_list_generation++; |
704232c2 JB |
499 | |
500 | /* add to debugfs */ | |
79c97e97 JB |
501 | rdev->wiphy.debugfsdir = |
502 | debugfs_create_dir(wiphy_name(&rdev->wiphy), | |
704232c2 | 503 | ieee80211_debugfs_dir); |
79c97e97 JB |
504 | if (IS_ERR(rdev->wiphy.debugfsdir)) |
505 | rdev->wiphy.debugfsdir = NULL; | |
704232c2 | 506 | |
5be83de5 | 507 | if (wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) { |
73d54c9e LR |
508 | struct regulatory_request request; |
509 | ||
510 | request.wiphy_idx = get_wiphy_idx(wiphy); | |
511 | request.initiator = NL80211_REGDOM_SET_BY_DRIVER; | |
512 | request.alpha2[0] = '9'; | |
513 | request.alpha2[1] = '9'; | |
514 | ||
515 | nl80211_send_reg_change_event(&request); | |
516 | } | |
517 | ||
79c97e97 | 518 | cfg80211_debugfs_rdev_add(rdev); |
5a652052 | 519 | mutex_unlock(&cfg80211_mutex); |
1ac61302 | 520 | |
c3d34d5d JL |
521 | /* |
522 | * due to a locking dependency this has to be outside of the | |
523 | * cfg80211_mutex lock | |
524 | */ | |
525 | res = rfkill_register(rdev->rfkill); | |
526 | if (res) | |
527 | goto out_rm_dev; | |
528 | ||
2f0accc1 | 529 | return 0; |
1f87f7d3 | 530 | |
5a652052 | 531 | out_rm_dev: |
79c97e97 | 532 | device_del(&rdev->wiphy.dev); |
704232c2 JB |
533 | return res; |
534 | } | |
535 | EXPORT_SYMBOL(wiphy_register); | |
536 | ||
1f87f7d3 JB |
537 | void wiphy_rfkill_start_polling(struct wiphy *wiphy) |
538 | { | |
79c97e97 | 539 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
1f87f7d3 | 540 | |
79c97e97 | 541 | if (!rdev->ops->rfkill_poll) |
1f87f7d3 | 542 | return; |
79c97e97 JB |
543 | rdev->rfkill_ops.poll = cfg80211_rfkill_poll; |
544 | rfkill_resume_polling(rdev->rfkill); | |
1f87f7d3 JB |
545 | } |
546 | EXPORT_SYMBOL(wiphy_rfkill_start_polling); | |
547 | ||
548 | void wiphy_rfkill_stop_polling(struct wiphy *wiphy) | |
549 | { | |
79c97e97 | 550 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
1f87f7d3 | 551 | |
79c97e97 | 552 | rfkill_pause_polling(rdev->rfkill); |
1f87f7d3 JB |
553 | } |
554 | EXPORT_SYMBOL(wiphy_rfkill_stop_polling); | |
555 | ||
704232c2 JB |
556 | void wiphy_unregister(struct wiphy *wiphy) |
557 | { | |
79c97e97 | 558 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
704232c2 | 559 | |
79c97e97 | 560 | rfkill_unregister(rdev->rfkill); |
1f87f7d3 | 561 | |
f16bfc1c | 562 | /* protect the device list */ |
a1794390 | 563 | mutex_lock(&cfg80211_mutex); |
704232c2 | 564 | |
ad002395 JB |
565 | wait_event(rdev->dev_wait, ({ |
566 | int __count; | |
567 | mutex_lock(&rdev->devlist_mtx); | |
568 | __count = rdev->opencount; | |
569 | mutex_unlock(&rdev->devlist_mtx); | |
570 | __count == 0;})); | |
571 | ||
572 | mutex_lock(&rdev->devlist_mtx); | |
79c97e97 | 573 | BUG_ON(!list_empty(&rdev->netdev_list)); |
ad002395 JB |
574 | mutex_unlock(&rdev->devlist_mtx); |
575 | ||
576 | /* | |
577 | * First remove the hardware from everywhere, this makes | |
578 | * it impossible to find from userspace. | |
579 | */ | |
7bcfaf2f | 580 | debugfs_remove_recursive(rdev->wiphy.debugfsdir); |
5f2aa25e JB |
581 | list_del_rcu(&rdev->list); |
582 | synchronize_rcu(); | |
f16bfc1c JB |
583 | |
584 | /* | |
79c97e97 | 585 | * Try to grab rdev->mtx. If a command is still in progress, |
f16bfc1c JB |
586 | * hopefully the driver will refuse it since it's tearing |
587 | * down the device already. We wait for this command to complete | |
588 | * before unlinking the item from the list. | |
589 | * Note: as codified by the BUG_ON above we cannot get here if | |
ad002395 JB |
590 | * a virtual interface is still present. Hence, we can only get |
591 | * to lock contention here if userspace issues a command that | |
592 | * identified the hardware by wiphy index. | |
f16bfc1c | 593 | */ |
0ff6ce7b | 594 | cfg80211_lock_rdev(rdev); |
ad002395 | 595 | /* nothing */ |
0ff6ce7b | 596 | cfg80211_unlock_rdev(rdev); |
704232c2 | 597 | |
3f2355cb LR |
598 | /* If this device got a regulatory hint tell core its |
599 | * free to listen now to a new shiny device regulatory hint */ | |
600 | reg_device_remove(wiphy); | |
601 | ||
f5ea9120 | 602 | cfg80211_rdev_list_generation++; |
79c97e97 | 603 | device_del(&rdev->wiphy.dev); |
704232c2 | 604 | |
a1794390 | 605 | mutex_unlock(&cfg80211_mutex); |
6682588a | 606 | |
36e6fea8 | 607 | flush_work(&rdev->scan_done_wk); |
6682588a | 608 | cancel_work_sync(&rdev->conn_work); |
6682588a | 609 | flush_work(&rdev->event_work); |
704232c2 JB |
610 | } |
611 | EXPORT_SYMBOL(wiphy_unregister); | |
612 | ||
79c97e97 | 613 | void cfg80211_dev_free(struct cfg80211_registered_device *rdev) |
704232c2 | 614 | { |
2a519311 | 615 | struct cfg80211_internal_bss *scan, *tmp; |
79c97e97 JB |
616 | rfkill_destroy(rdev->rfkill); |
617 | mutex_destroy(&rdev->mtx); | |
618 | mutex_destroy(&rdev->devlist_mtx); | |
619 | list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list) | |
78c1c7e1 | 620 | cfg80211_put_bss(&scan->pub); |
79c97e97 | 621 | kfree(rdev); |
704232c2 JB |
622 | } |
623 | ||
624 | void wiphy_free(struct wiphy *wiphy) | |
625 | { | |
626 | put_device(&wiphy->dev); | |
627 | } | |
628 | EXPORT_SYMBOL(wiphy_free); | |
629 | ||
1f87f7d3 JB |
630 | void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked) |
631 | { | |
79c97e97 | 632 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
1f87f7d3 | 633 | |
79c97e97 JB |
634 | if (rfkill_set_hw_state(rdev->rfkill, blocked)) |
635 | schedule_work(&rdev->rfkill_sync); | |
1f87f7d3 JB |
636 | } |
637 | EXPORT_SYMBOL(wiphy_rfkill_set_hw_state); | |
638 | ||
ad002395 JB |
639 | static void wdev_cleanup_work(struct work_struct *work) |
640 | { | |
641 | struct wireless_dev *wdev; | |
642 | struct cfg80211_registered_device *rdev; | |
643 | ||
644 | wdev = container_of(work, struct wireless_dev, cleanup_work); | |
645 | rdev = wiphy_to_dev(wdev->wiphy); | |
646 | ||
647 | cfg80211_lock_rdev(rdev); | |
648 | ||
649 | if (WARN_ON(rdev->scan_req && rdev->scan_req->dev == wdev->netdev)) { | |
650 | rdev->scan_req->aborted = true; | |
01a0ac41 | 651 | ___cfg80211_scan_done(rdev, true); |
ad002395 JB |
652 | } |
653 | ||
654 | cfg80211_unlock_rdev(rdev); | |
655 | ||
656 | mutex_lock(&rdev->devlist_mtx); | |
657 | rdev->opencount--; | |
658 | mutex_unlock(&rdev->devlist_mtx); | |
659 | wake_up(&rdev->dev_wait); | |
660 | ||
661 | dev_put(wdev->netdev); | |
662 | } | |
663 | ||
053a93dd MH |
664 | static struct device_type wiphy_type = { |
665 | .name = "wlan", | |
666 | }; | |
667 | ||
704232c2 JB |
668 | static int cfg80211_netdev_notifier_call(struct notifier_block * nb, |
669 | unsigned long state, | |
670 | void *ndev) | |
671 | { | |
672 | struct net_device *dev = ndev; | |
2a783c13 | 673 | struct wireless_dev *wdev = dev->ieee80211_ptr; |
704232c2 JB |
674 | struct cfg80211_registered_device *rdev; |
675 | ||
2a783c13 | 676 | if (!wdev) |
1f87f7d3 | 677 | return NOTIFY_DONE; |
704232c2 | 678 | |
2a783c13 | 679 | rdev = wiphy_to_dev(wdev->wiphy); |
704232c2 | 680 | |
2a783c13 | 681 | WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED); |
60719ffd | 682 | |
704232c2 | 683 | switch (state) { |
053a93dd MH |
684 | case NETDEV_POST_INIT: |
685 | SET_NETDEV_DEVTYPE(dev, &wiphy_type); | |
686 | break; | |
704232c2 | 687 | case NETDEV_REGISTER: |
0ff6ce7b JB |
688 | /* |
689 | * NB: cannot take rdev->mtx here because this may be | |
690 | * called within code protected by it when interfaces | |
691 | * are added with nl80211. | |
692 | */ | |
667503dd | 693 | mutex_init(&wdev->mtx); |
ad002395 | 694 | INIT_WORK(&wdev->cleanup_work, wdev_cleanup_work); |
667503dd JB |
695 | INIT_LIST_HEAD(&wdev->event_list); |
696 | spin_lock_init(&wdev->event_lock); | |
2e161f78 JB |
697 | INIT_LIST_HEAD(&wdev->mgmt_registrations); |
698 | spin_lock_init(&wdev->mgmt_registrations_lock); | |
026331c4 | 699 | |
704232c2 | 700 | mutex_lock(&rdev->devlist_mtx); |
5f2aa25e | 701 | list_add_rcu(&wdev->list, &rdev->netdev_list); |
f5ea9120 | 702 | rdev->devlist_generation++; |
463d0183 JB |
703 | /* can only change netns with wiphy */ |
704 | dev->features |= NETIF_F_NETNS_LOCAL; | |
705 | ||
704232c2 JB |
706 | if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj, |
707 | "phy80211")) { | |
708 | printk(KERN_ERR "wireless: failed to add phy80211 " | |
709 | "symlink to netdev!\n"); | |
710 | } | |
2a783c13 | 711 | wdev->netdev = dev; |
b23aa676 | 712 | wdev->sme_state = CFG80211_SME_IDLE; |
bc92afd9 | 713 | mutex_unlock(&rdev->devlist_mtx); |
3d23e349 | 714 | #ifdef CONFIG_CFG80211_WEXT |
2a783c13 JB |
715 | wdev->wext.default_key = -1; |
716 | wdev->wext.default_mgmt_key = -1; | |
f2129354 | 717 | wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; |
ffb9eb3d KV |
718 | #endif |
719 | ||
5be83de5 | 720 | if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT) |
ffb9eb3d | 721 | wdev->ps = true; |
5be83de5 | 722 | else |
ffb9eb3d | 723 | wdev->ps = false; |
9043f3b8 JO |
724 | /* allow mac80211 to determine the timeout */ |
725 | wdev->ps_timeout = -1; | |
bc92afd9 JB |
726 | if (rdev->ops->set_power_mgmt) |
727 | if (rdev->ops->set_power_mgmt(wdev->wiphy, dev, | |
ffb9eb3d KV |
728 | wdev->ps, |
729 | wdev->ps_timeout)) { | |
bc92afd9 | 730 | /* assume this means it's off */ |
ffb9eb3d | 731 | wdev->ps = false; |
bc92afd9 | 732 | } |
ffb9eb3d | 733 | |
4890e3be JL |
734 | if (!dev->ethtool_ops) |
735 | dev->ethtool_ops = &cfg80211_ethtool_ops; | |
ad4bb6f8 JB |
736 | |
737 | if ((wdev->iftype == NL80211_IFTYPE_STATION || | |
074ac8df | 738 | wdev->iftype == NL80211_IFTYPE_P2P_CLIENT || |
ad4bb6f8 JB |
739 | wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr) |
740 | dev->priv_flags |= IFF_DONT_BRIDGE; | |
704232c2 | 741 | break; |
04a773ad | 742 | case NETDEV_GOING_DOWN: |
b23aa676 SO |
743 | switch (wdev->iftype) { |
744 | case NL80211_IFTYPE_ADHOC: | |
745 | cfg80211_leave_ibss(rdev, dev, true); | |
746 | break; | |
074ac8df | 747 | case NL80211_IFTYPE_P2P_CLIENT: |
b23aa676 | 748 | case NL80211_IFTYPE_STATION: |
667503dd | 749 | wdev_lock(wdev); |
3d23e349 | 750 | #ifdef CONFIG_CFG80211_WEXT |
f2129354 JB |
751 | kfree(wdev->wext.ie); |
752 | wdev->wext.ie = NULL; | |
753 | wdev->wext.ie_len = 0; | |
0eb14647 | 754 | wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; |
f2129354 | 755 | #endif |
667503dd JB |
756 | __cfg80211_disconnect(rdev, dev, |
757 | WLAN_REASON_DEAUTH_LEAVING, true); | |
19957bb3 | 758 | cfg80211_mlme_down(rdev, dev); |
667503dd | 759 | wdev_unlock(wdev); |
b23aa676 SO |
760 | break; |
761 | default: | |
762 | break; | |
763 | } | |
01a0ac41 JB |
764 | break; |
765 | case NETDEV_DOWN: | |
ad002395 | 766 | dev_hold(dev); |
e60d7443 | 767 | queue_work(cfg80211_wq, &wdev->cleanup_work); |
04a773ad JB |
768 | break; |
769 | case NETDEV_UP: | |
ad002395 JB |
770 | /* |
771 | * If we have a really quick DOWN/UP succession we may | |
772 | * have this work still pending ... cancel it and see | |
773 | * if it was pending, in which case we need to account | |
774 | * for some of the work it would have done. | |
775 | */ | |
776 | if (cancel_work_sync(&wdev->cleanup_work)) { | |
777 | mutex_lock(&rdev->devlist_mtx); | |
778 | rdev->opencount--; | |
779 | mutex_unlock(&rdev->devlist_mtx); | |
780 | dev_put(dev); | |
781 | } | |
667503dd | 782 | cfg80211_lock_rdev(rdev); |
aee83eaf | 783 | mutex_lock(&rdev->devlist_mtx); |
8c5d9808 | 784 | #ifdef CONFIG_CFG80211_WEXT |
667503dd | 785 | wdev_lock(wdev); |
f2129354 JB |
786 | switch (wdev->iftype) { |
787 | case NL80211_IFTYPE_ADHOC: | |
fffd0934 | 788 | cfg80211_ibss_wext_join(rdev, wdev); |
04a773ad | 789 | break; |
f2129354 | 790 | case NL80211_IFTYPE_STATION: |
fffd0934 | 791 | cfg80211_mgd_wext_connect(rdev, wdev); |
f2129354 JB |
792 | break; |
793 | default: | |
04a773ad | 794 | break; |
f2129354 | 795 | } |
667503dd | 796 | wdev_unlock(wdev); |
8c5d9808 | 797 | #endif |
ad002395 | 798 | rdev->opencount++; |
aee83eaf | 799 | mutex_unlock(&rdev->devlist_mtx); |
667503dd | 800 | cfg80211_unlock_rdev(rdev); |
2a783c13 | 801 | break; |
704232c2 | 802 | case NETDEV_UNREGISTER: |
0ff6ce7b JB |
803 | /* |
804 | * NB: cannot take rdev->mtx here because this may be | |
805 | * called within code protected by it when interfaces | |
806 | * are removed with nl80211. | |
807 | */ | |
704232c2 | 808 | mutex_lock(&rdev->devlist_mtx); |
e40cbdac JB |
809 | /* |
810 | * It is possible to get NETDEV_UNREGISTER | |
811 | * multiple times. To detect that, check | |
812 | * that the interface is still on the list | |
813 | * of registered interfaces, and only then | |
814 | * remove and clean it up. | |
815 | */ | |
2a783c13 | 816 | if (!list_empty(&wdev->list)) { |
704232c2 | 817 | sysfs_remove_link(&dev->dev.kobj, "phy80211"); |
5f2aa25e | 818 | list_del_rcu(&wdev->list); |
f5ea9120 | 819 | rdev->devlist_generation++; |
2e161f78 | 820 | cfg80211_mlme_purge_registrations(wdev); |
3d23e349 | 821 | #ifdef CONFIG_CFG80211_WEXT |
e40cbdac | 822 | kfree(wdev->wext.keys); |
fffd0934 | 823 | #endif |
e40cbdac JB |
824 | } |
825 | mutex_unlock(&rdev->devlist_mtx); | |
5f2aa25e JB |
826 | /* |
827 | * synchronise (so that we won't find this netdev | |
828 | * from other code any more) and then clear the list | |
829 | * head so that the above code can safely check for | |
830 | * !list_empty() to avoid double-cleanup. | |
831 | */ | |
832 | synchronize_rcu(); | |
833 | INIT_LIST_HEAD(&wdev->list); | |
704232c2 | 834 | break; |
1f87f7d3 | 835 | case NETDEV_PRE_UP: |
0b20633d JB |
836 | if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype))) |
837 | return notifier_from_errno(-EOPNOTSUPP); | |
1f87f7d3 JB |
838 | if (rfkill_blocked(rdev->rfkill)) |
839 | return notifier_from_errno(-ERFKILL); | |
840 | break; | |
704232c2 JB |
841 | } |
842 | ||
1f87f7d3 | 843 | return NOTIFY_DONE; |
704232c2 JB |
844 | } |
845 | ||
846 | static struct notifier_block cfg80211_netdev_notifier = { | |
847 | .notifier_call = cfg80211_netdev_notifier_call, | |
848 | }; | |
849 | ||
463d0183 JB |
850 | static void __net_exit cfg80211_pernet_exit(struct net *net) |
851 | { | |
852 | struct cfg80211_registered_device *rdev; | |
853 | ||
854 | rtnl_lock(); | |
855 | mutex_lock(&cfg80211_mutex); | |
856 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { | |
857 | if (net_eq(wiphy_net(&rdev->wiphy), net)) | |
858 | WARN_ON(cfg80211_switch_netns(rdev, &init_net)); | |
859 | } | |
860 | mutex_unlock(&cfg80211_mutex); | |
861 | rtnl_unlock(); | |
862 | } | |
863 | ||
864 | static struct pernet_operations cfg80211_pernet_ops = { | |
865 | .exit = cfg80211_pernet_exit, | |
866 | }; | |
867 | ||
868 | static int __init cfg80211_init(void) | |
704232c2 | 869 | { |
b2e1b302 LR |
870 | int err; |
871 | ||
463d0183 JB |
872 | err = register_pernet_device(&cfg80211_pernet_ops); |
873 | if (err) | |
874 | goto out_fail_pernet; | |
875 | ||
b2e1b302 | 876 | err = wiphy_sysfs_init(); |
704232c2 JB |
877 | if (err) |
878 | goto out_fail_sysfs; | |
879 | ||
880 | err = register_netdevice_notifier(&cfg80211_netdev_notifier); | |
881 | if (err) | |
882 | goto out_fail_notifier; | |
883 | ||
55682965 JB |
884 | err = nl80211_init(); |
885 | if (err) | |
886 | goto out_fail_nl80211; | |
887 | ||
704232c2 JB |
888 | ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL); |
889 | ||
b2e1b302 LR |
890 | err = regulatory_init(); |
891 | if (err) | |
892 | goto out_fail_reg; | |
893 | ||
e60d7443 AB |
894 | cfg80211_wq = create_singlethread_workqueue("cfg80211"); |
895 | if (!cfg80211_wq) | |
896 | goto out_fail_wq; | |
897 | ||
704232c2 JB |
898 | return 0; |
899 | ||
e60d7443 AB |
900 | out_fail_wq: |
901 | regulatory_exit(); | |
b2e1b302 LR |
902 | out_fail_reg: |
903 | debugfs_remove(ieee80211_debugfs_dir); | |
55682965 JB |
904 | out_fail_nl80211: |
905 | unregister_netdevice_notifier(&cfg80211_netdev_notifier); | |
704232c2 JB |
906 | out_fail_notifier: |
907 | wiphy_sysfs_exit(); | |
908 | out_fail_sysfs: | |
463d0183 JB |
909 | unregister_pernet_device(&cfg80211_pernet_ops); |
910 | out_fail_pernet: | |
704232c2 JB |
911 | return err; |
912 | } | |
3a462465 | 913 | subsys_initcall(cfg80211_init); |
704232c2 | 914 | |
f884e387 | 915 | static void __exit cfg80211_exit(void) |
704232c2 JB |
916 | { |
917 | debugfs_remove(ieee80211_debugfs_dir); | |
55682965 | 918 | nl80211_exit(); |
704232c2 JB |
919 | unregister_netdevice_notifier(&cfg80211_netdev_notifier); |
920 | wiphy_sysfs_exit(); | |
b2e1b302 | 921 | regulatory_exit(); |
463d0183 | 922 | unregister_pernet_device(&cfg80211_pernet_ops); |
e60d7443 | 923 | destroy_workqueue(cfg80211_wq); |
704232c2 JB |
924 | } |
925 | module_exit(cfg80211_exit); |