]>
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; |
b5850a7a | 181 | int wiphy_idx, taken = -1, result, digits; |
55682965 | 182 | |
4bbf4d56 | 183 | assert_cfg80211_lock(); |
2940bb69 | 184 | |
55682965 | 185 | /* prohibit calling the thing phy%d when %d is not its number */ |
b5850a7a LR |
186 | sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken); |
187 | if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) { | |
188 | /* count number of places needed to print wiphy_idx */ | |
55682965 | 189 | digits = 1; |
b5850a7a | 190 | while (wiphy_idx /= 10) |
55682965 JB |
191 | digits++; |
192 | /* | |
193 | * deny the name if it is phy<idx> where <idx> is printed | |
194 | * without leading zeroes. taken == strlen(newname) here | |
195 | */ | |
196 | if (taken == strlen(PHY_NAME) + digits) | |
4bbf4d56 | 197 | return -EINVAL; |
2940bb69 EB |
198 | } |
199 | ||
200 | ||
201 | /* Ignore nop renames */ | |
2940bb69 | 202 | if (strcmp(newname, dev_name(&rdev->wiphy.dev)) == 0) |
4bbf4d56 | 203 | return 0; |
2940bb69 EB |
204 | |
205 | /* Ensure another device does not already have this name. */ | |
79c97e97 JB |
206 | list_for_each_entry(rdev2, &cfg80211_rdev_list, list) |
207 | if (strcmp(newname, dev_name(&rdev2->wiphy.dev)) == 0) | |
4bbf4d56 | 208 | return -EINVAL; |
55682965 | 209 | |
55682965 JB |
210 | result = device_rename(&rdev->wiphy.dev, newname); |
211 | if (result) | |
4bbf4d56 | 212 | return result; |
55682965 | 213 | |
33c0360b JB |
214 | if (rdev->wiphy.debugfsdir && |
215 | !debugfs_rename(rdev->wiphy.debugfsdir->d_parent, | |
55682965 JB |
216 | rdev->wiphy.debugfsdir, |
217 | rdev->wiphy.debugfsdir->d_parent, | |
218 | newname)) | |
219 | printk(KERN_ERR "cfg80211: failed to rename debugfs dir to %s!\n", | |
220 | newname); | |
221 | ||
4bbf4d56 | 222 | nl80211_notify_dev_rename(rdev); |
55682965 | 223 | |
4bbf4d56 | 224 | return 0; |
55682965 JB |
225 | } |
226 | ||
463d0183 JB |
227 | int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, |
228 | struct net *net) | |
229 | { | |
230 | struct wireless_dev *wdev; | |
231 | int err = 0; | |
232 | ||
5be83de5 | 233 | if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK)) |
463d0183 JB |
234 | return -EOPNOTSUPP; |
235 | ||
236 | list_for_each_entry(wdev, &rdev->netdev_list, list) { | |
237 | wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL; | |
238 | err = dev_change_net_namespace(wdev->netdev, net, "wlan%d"); | |
239 | if (err) | |
240 | break; | |
241 | wdev->netdev->features |= NETIF_F_NETNS_LOCAL; | |
242 | } | |
243 | ||
244 | if (err) { | |
245 | /* failed -- clean up to old netns */ | |
246 | net = wiphy_net(&rdev->wiphy); | |
247 | ||
248 | list_for_each_entry_continue_reverse(wdev, &rdev->netdev_list, | |
249 | list) { | |
250 | wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL; | |
251 | err = dev_change_net_namespace(wdev->netdev, net, | |
252 | "wlan%d"); | |
253 | WARN_ON(err); | |
254 | wdev->netdev->features |= NETIF_F_NETNS_LOCAL; | |
255 | } | |
256 | } | |
257 | ||
258 | wiphy_net_set(&rdev->wiphy, net); | |
259 | ||
260 | return err; | |
261 | } | |
262 | ||
1f87f7d3 JB |
263 | static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data) |
264 | { | |
79c97e97 | 265 | struct cfg80211_registered_device *rdev = data; |
1f87f7d3 | 266 | |
79c97e97 | 267 | rdev->ops->rfkill_poll(&rdev->wiphy); |
1f87f7d3 JB |
268 | } |
269 | ||
270 | static int cfg80211_rfkill_set_block(void *data, bool blocked) | |
271 | { | |
79c97e97 | 272 | struct cfg80211_registered_device *rdev = data; |
1f87f7d3 JB |
273 | struct wireless_dev *wdev; |
274 | ||
275 | if (!blocked) | |
276 | return 0; | |
277 | ||
278 | rtnl_lock(); | |
79c97e97 | 279 | mutex_lock(&rdev->devlist_mtx); |
1f87f7d3 | 280 | |
79c97e97 | 281 | list_for_each_entry(wdev, &rdev->netdev_list, list) |
1f87f7d3 JB |
282 | dev_close(wdev->netdev); |
283 | ||
79c97e97 | 284 | mutex_unlock(&rdev->devlist_mtx); |
1f87f7d3 JB |
285 | rtnl_unlock(); |
286 | ||
287 | return 0; | |
288 | } | |
289 | ||
290 | static void cfg80211_rfkill_sync_work(struct work_struct *work) | |
291 | { | |
79c97e97 | 292 | struct cfg80211_registered_device *rdev; |
1f87f7d3 | 293 | |
79c97e97 JB |
294 | rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync); |
295 | cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill)); | |
1f87f7d3 JB |
296 | } |
297 | ||
667503dd JB |
298 | static void cfg80211_event_work(struct work_struct *work) |
299 | { | |
300 | struct cfg80211_registered_device *rdev; | |
667503dd JB |
301 | |
302 | rdev = container_of(work, struct cfg80211_registered_device, | |
303 | event_work); | |
304 | ||
305 | rtnl_lock(); | |
306 | cfg80211_lock_rdev(rdev); | |
667503dd | 307 | |
3d54d255 | 308 | cfg80211_process_rdev_events(rdev); |
667503dd JB |
309 | cfg80211_unlock_rdev(rdev); |
310 | rtnl_unlock(); | |
311 | } | |
312 | ||
704232c2 JB |
313 | /* exported functions */ |
314 | ||
3dcf670b | 315 | struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv) |
704232c2 | 316 | { |
638af073 DC |
317 | static int wiphy_counter; |
318 | ||
79c97e97 | 319 | struct cfg80211_registered_device *rdev; |
704232c2 JB |
320 | int alloc_size; |
321 | ||
0b20633d JB |
322 | WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key)); |
323 | WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc)); | |
324 | WARN_ON(ops->connect && !ops->disconnect); | |
325 | WARN_ON(ops->join_ibss && !ops->leave_ibss); | |
326 | WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf); | |
327 | WARN_ON(ops->add_station && !ops->del_station); | |
328 | WARN_ON(ops->add_mpath && !ops->del_mpath); | |
41ade00f | 329 | |
79c97e97 | 330 | alloc_size = sizeof(*rdev) + sizeof_priv; |
704232c2 | 331 | |
79c97e97 JB |
332 | rdev = kzalloc(alloc_size, GFP_KERNEL); |
333 | if (!rdev) | |
704232c2 JB |
334 | return NULL; |
335 | ||
79c97e97 | 336 | rdev->ops = ops; |
704232c2 | 337 | |
a1794390 | 338 | mutex_lock(&cfg80211_mutex); |
704232c2 | 339 | |
79c97e97 | 340 | rdev->wiphy_idx = wiphy_counter++; |
a4d73ee1 | 341 | |
79c97e97 | 342 | if (unlikely(!wiphy_idx_valid(rdev->wiphy_idx))) { |
638af073 | 343 | wiphy_counter--; |
a1794390 | 344 | mutex_unlock(&cfg80211_mutex); |
704232c2 | 345 | /* ugh, wrapped! */ |
79c97e97 | 346 | kfree(rdev); |
704232c2 JB |
347 | return NULL; |
348 | } | |
704232c2 | 349 | |
a1794390 | 350 | mutex_unlock(&cfg80211_mutex); |
638af073 | 351 | |
704232c2 | 352 | /* give it a proper name */ |
79c97e97 JB |
353 | dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx); |
354 | ||
355 | mutex_init(&rdev->mtx); | |
356 | mutex_init(&rdev->devlist_mtx); | |
357 | INIT_LIST_HEAD(&rdev->netdev_list); | |
358 | spin_lock_init(&rdev->bss_lock); | |
359 | INIT_LIST_HEAD(&rdev->bss_list); | |
360 | INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done); | |
361 | ||
3d23e349 JB |
362 | #ifdef CONFIG_CFG80211_WEXT |
363 | rdev->wiphy.wext = &cfg80211_wext_handler; | |
364 | #endif | |
365 | ||
79c97e97 JB |
366 | device_initialize(&rdev->wiphy.dev); |
367 | rdev->wiphy.dev.class = &ieee80211_class; | |
368 | rdev->wiphy.dev.platform_data = rdev; | |
369 | ||
5be83de5 JB |
370 | #ifdef CONFIG_CFG80211_DEFAULT_PS |
371 | rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT; | |
372 | #endif | |
16cb9d42 | 373 | |
463d0183 JB |
374 | wiphy_net_set(&rdev->wiphy, &init_net); |
375 | ||
79c97e97 JB |
376 | rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block; |
377 | rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev), | |
378 | &rdev->wiphy.dev, RFKILL_TYPE_WLAN, | |
379 | &rdev->rfkill_ops, rdev); | |
380 | ||
381 | if (!rdev->rfkill) { | |
382 | kfree(rdev); | |
1f87f7d3 JB |
383 | return NULL; |
384 | } | |
385 | ||
79c97e97 JB |
386 | INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work); |
387 | INIT_WORK(&rdev->conn_work, cfg80211_conn_work); | |
388 | INIT_WORK(&rdev->event_work, cfg80211_event_work); | |
1f87f7d3 | 389 | |
ad002395 JB |
390 | init_waitqueue_head(&rdev->dev_wait); |
391 | ||
b9a5f8ca JM |
392 | /* |
393 | * Initialize wiphy parameters to IEEE 802.11 MIB default values. | |
394 | * Fragmentation and RTS threshold are disabled by default with the | |
395 | * special -1 value. | |
396 | */ | |
79c97e97 JB |
397 | rdev->wiphy.retry_short = 7; |
398 | rdev->wiphy.retry_long = 4; | |
399 | rdev->wiphy.frag_threshold = (u32) -1; | |
400 | rdev->wiphy.rts_threshold = (u32) -1; | |
81077e82 | 401 | rdev->wiphy.coverage_class = 0; |
b9a5f8ca | 402 | |
79c97e97 | 403 | return &rdev->wiphy; |
704232c2 JB |
404 | } |
405 | EXPORT_SYMBOL(wiphy_new); | |
406 | ||
407 | int wiphy_register(struct wiphy *wiphy) | |
408 | { | |
79c97e97 | 409 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
704232c2 | 410 | int res; |
8318d78a JB |
411 | enum ieee80211_band band; |
412 | struct ieee80211_supported_band *sband; | |
413 | bool have_band = false; | |
414 | int i; | |
f59ac048 LR |
415 | u16 ifmodes = wiphy->interface_modes; |
416 | ||
ef15aac6 JB |
417 | if (WARN_ON(wiphy->addresses && !wiphy->n_addresses)) |
418 | return -EINVAL; | |
419 | ||
420 | if (WARN_ON(wiphy->addresses && | |
421 | !is_zero_ether_addr(wiphy->perm_addr) && | |
422 | memcmp(wiphy->perm_addr, wiphy->addresses[0].addr, | |
423 | ETH_ALEN))) | |
424 | return -EINVAL; | |
425 | ||
426 | if (wiphy->addresses) | |
427 | memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN); | |
428 | ||
f59ac048 LR |
429 | /* sanity check ifmodes */ |
430 | WARN_ON(!ifmodes); | |
431 | ifmodes &= ((1 << __NL80211_IFTYPE_AFTER_LAST) - 1) & ~1; | |
432 | if (WARN_ON(ifmodes != wiphy->interface_modes)) | |
433 | wiphy->interface_modes = ifmodes; | |
8318d78a JB |
434 | |
435 | /* sanity check supported bands/channels */ | |
436 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
437 | sband = wiphy->bands[band]; | |
438 | if (!sband) | |
439 | continue; | |
440 | ||
441 | sband->band = band; | |
442 | ||
881d948c JB |
443 | if (WARN_ON(!sband->n_channels || !sband->n_bitrates)) |
444 | return -EINVAL; | |
445 | ||
446 | /* | |
447 | * Since we use a u32 for rate bitmaps in | |
448 | * ieee80211_get_response_rate, we cannot | |
449 | * have more than 32 legacy rates. | |
450 | */ | |
451 | if (WARN_ON(sband->n_bitrates > 32)) | |
8318d78a | 452 | return -EINVAL; |
8318d78a JB |
453 | |
454 | for (i = 0; i < sband->n_channels; i++) { | |
455 | sband->channels[i].orig_flags = | |
456 | sband->channels[i].flags; | |
457 | sband->channels[i].orig_mag = | |
458 | sband->channels[i].max_antenna_gain; | |
459 | sband->channels[i].orig_mpwr = | |
460 | sband->channels[i].max_power; | |
461 | sband->channels[i].band = band; | |
462 | } | |
463 | ||
464 | have_band = true; | |
465 | } | |
466 | ||
467 | if (!have_band) { | |
468 | WARN_ON(1); | |
469 | return -EINVAL; | |
470 | } | |
471 | ||
472 | /* check and set up bitrates */ | |
473 | ieee80211_set_bitrate_flags(wiphy); | |
474 | ||
79c97e97 | 475 | res = device_add(&rdev->wiphy.dev); |
704232c2 | 476 | if (res) |
2f0accc1 | 477 | return res; |
704232c2 | 478 | |
79c97e97 | 479 | res = rfkill_register(rdev->rfkill); |
1f87f7d3 JB |
480 | if (res) |
481 | goto out_rm_dev; | |
482 | ||
2f0accc1 JB |
483 | mutex_lock(&cfg80211_mutex); |
484 | ||
485 | /* set up regulatory info */ | |
486 | wiphy_update_regulatory(wiphy, NL80211_REGDOM_SET_BY_CORE); | |
487 | ||
5f2aa25e | 488 | list_add_rcu(&rdev->list, &cfg80211_rdev_list); |
f5ea9120 | 489 | cfg80211_rdev_list_generation++; |
704232c2 | 490 | |
2f0accc1 JB |
491 | mutex_unlock(&cfg80211_mutex); |
492 | ||
704232c2 | 493 | /* add to debugfs */ |
79c97e97 JB |
494 | rdev->wiphy.debugfsdir = |
495 | debugfs_create_dir(wiphy_name(&rdev->wiphy), | |
704232c2 | 496 | ieee80211_debugfs_dir); |
79c97e97 JB |
497 | if (IS_ERR(rdev->wiphy.debugfsdir)) |
498 | rdev->wiphy.debugfsdir = NULL; | |
704232c2 | 499 | |
5be83de5 | 500 | if (wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) { |
73d54c9e LR |
501 | struct regulatory_request request; |
502 | ||
503 | request.wiphy_idx = get_wiphy_idx(wiphy); | |
504 | request.initiator = NL80211_REGDOM_SET_BY_DRIVER; | |
505 | request.alpha2[0] = '9'; | |
506 | request.alpha2[1] = '9'; | |
507 | ||
508 | nl80211_send_reg_change_event(&request); | |
509 | } | |
510 | ||
79c97e97 | 511 | cfg80211_debugfs_rdev_add(rdev); |
1ac61302 | 512 | |
2f0accc1 | 513 | return 0; |
1f87f7d3 JB |
514 | |
515 | out_rm_dev: | |
79c97e97 | 516 | device_del(&rdev->wiphy.dev); |
704232c2 JB |
517 | return res; |
518 | } | |
519 | EXPORT_SYMBOL(wiphy_register); | |
520 | ||
1f87f7d3 JB |
521 | void wiphy_rfkill_start_polling(struct wiphy *wiphy) |
522 | { | |
79c97e97 | 523 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
1f87f7d3 | 524 | |
79c97e97 | 525 | if (!rdev->ops->rfkill_poll) |
1f87f7d3 | 526 | return; |
79c97e97 JB |
527 | rdev->rfkill_ops.poll = cfg80211_rfkill_poll; |
528 | rfkill_resume_polling(rdev->rfkill); | |
1f87f7d3 JB |
529 | } |
530 | EXPORT_SYMBOL(wiphy_rfkill_start_polling); | |
531 | ||
532 | void wiphy_rfkill_stop_polling(struct wiphy *wiphy) | |
533 | { | |
79c97e97 | 534 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
1f87f7d3 | 535 | |
79c97e97 | 536 | rfkill_pause_polling(rdev->rfkill); |
1f87f7d3 JB |
537 | } |
538 | EXPORT_SYMBOL(wiphy_rfkill_stop_polling); | |
539 | ||
704232c2 JB |
540 | void wiphy_unregister(struct wiphy *wiphy) |
541 | { | |
79c97e97 | 542 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
704232c2 | 543 | |
79c97e97 | 544 | rfkill_unregister(rdev->rfkill); |
1f87f7d3 | 545 | |
f16bfc1c | 546 | /* protect the device list */ |
a1794390 | 547 | mutex_lock(&cfg80211_mutex); |
704232c2 | 548 | |
ad002395 JB |
549 | wait_event(rdev->dev_wait, ({ |
550 | int __count; | |
551 | mutex_lock(&rdev->devlist_mtx); | |
552 | __count = rdev->opencount; | |
553 | mutex_unlock(&rdev->devlist_mtx); | |
554 | __count == 0;})); | |
555 | ||
556 | mutex_lock(&rdev->devlist_mtx); | |
79c97e97 | 557 | BUG_ON(!list_empty(&rdev->netdev_list)); |
ad002395 JB |
558 | mutex_unlock(&rdev->devlist_mtx); |
559 | ||
560 | /* | |
561 | * First remove the hardware from everywhere, this makes | |
562 | * it impossible to find from userspace. | |
563 | */ | |
7bcfaf2f | 564 | debugfs_remove_recursive(rdev->wiphy.debugfsdir); |
5f2aa25e JB |
565 | list_del_rcu(&rdev->list); |
566 | synchronize_rcu(); | |
f16bfc1c JB |
567 | |
568 | /* | |
79c97e97 | 569 | * Try to grab rdev->mtx. If a command is still in progress, |
f16bfc1c JB |
570 | * hopefully the driver will refuse it since it's tearing |
571 | * down the device already. We wait for this command to complete | |
572 | * before unlinking the item from the list. | |
573 | * Note: as codified by the BUG_ON above we cannot get here if | |
ad002395 JB |
574 | * a virtual interface is still present. Hence, we can only get |
575 | * to lock contention here if userspace issues a command that | |
576 | * identified the hardware by wiphy index. | |
f16bfc1c | 577 | */ |
0ff6ce7b | 578 | cfg80211_lock_rdev(rdev); |
ad002395 | 579 | /* nothing */ |
0ff6ce7b | 580 | cfg80211_unlock_rdev(rdev); |
704232c2 | 581 | |
3f2355cb LR |
582 | /* If this device got a regulatory hint tell core its |
583 | * free to listen now to a new shiny device regulatory hint */ | |
584 | reg_device_remove(wiphy); | |
585 | ||
f5ea9120 | 586 | cfg80211_rdev_list_generation++; |
79c97e97 | 587 | device_del(&rdev->wiphy.dev); |
704232c2 | 588 | |
a1794390 | 589 | mutex_unlock(&cfg80211_mutex); |
6682588a | 590 | |
36e6fea8 | 591 | flush_work(&rdev->scan_done_wk); |
6682588a | 592 | cancel_work_sync(&rdev->conn_work); |
6682588a | 593 | flush_work(&rdev->event_work); |
704232c2 JB |
594 | } |
595 | EXPORT_SYMBOL(wiphy_unregister); | |
596 | ||
79c97e97 | 597 | void cfg80211_dev_free(struct cfg80211_registered_device *rdev) |
704232c2 | 598 | { |
2a519311 | 599 | struct cfg80211_internal_bss *scan, *tmp; |
79c97e97 JB |
600 | rfkill_destroy(rdev->rfkill); |
601 | mutex_destroy(&rdev->mtx); | |
602 | mutex_destroy(&rdev->devlist_mtx); | |
603 | list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list) | |
78c1c7e1 | 604 | cfg80211_put_bss(&scan->pub); |
79c97e97 | 605 | kfree(rdev); |
704232c2 JB |
606 | } |
607 | ||
608 | void wiphy_free(struct wiphy *wiphy) | |
609 | { | |
610 | put_device(&wiphy->dev); | |
611 | } | |
612 | EXPORT_SYMBOL(wiphy_free); | |
613 | ||
1f87f7d3 JB |
614 | void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked) |
615 | { | |
79c97e97 | 616 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
1f87f7d3 | 617 | |
79c97e97 JB |
618 | if (rfkill_set_hw_state(rdev->rfkill, blocked)) |
619 | schedule_work(&rdev->rfkill_sync); | |
1f87f7d3 JB |
620 | } |
621 | EXPORT_SYMBOL(wiphy_rfkill_set_hw_state); | |
622 | ||
ad002395 JB |
623 | static void wdev_cleanup_work(struct work_struct *work) |
624 | { | |
625 | struct wireless_dev *wdev; | |
626 | struct cfg80211_registered_device *rdev; | |
627 | ||
628 | wdev = container_of(work, struct wireless_dev, cleanup_work); | |
629 | rdev = wiphy_to_dev(wdev->wiphy); | |
630 | ||
631 | cfg80211_lock_rdev(rdev); | |
632 | ||
633 | if (WARN_ON(rdev->scan_req && rdev->scan_req->dev == wdev->netdev)) { | |
634 | rdev->scan_req->aborted = true; | |
01a0ac41 | 635 | ___cfg80211_scan_done(rdev, true); |
ad002395 JB |
636 | } |
637 | ||
638 | cfg80211_unlock_rdev(rdev); | |
639 | ||
640 | mutex_lock(&rdev->devlist_mtx); | |
641 | rdev->opencount--; | |
642 | mutex_unlock(&rdev->devlist_mtx); | |
643 | wake_up(&rdev->dev_wait); | |
644 | ||
645 | dev_put(wdev->netdev); | |
646 | } | |
647 | ||
053a93dd MH |
648 | static struct device_type wiphy_type = { |
649 | .name = "wlan", | |
650 | }; | |
651 | ||
704232c2 JB |
652 | static int cfg80211_netdev_notifier_call(struct notifier_block * nb, |
653 | unsigned long state, | |
654 | void *ndev) | |
655 | { | |
656 | struct net_device *dev = ndev; | |
2a783c13 | 657 | struct wireless_dev *wdev = dev->ieee80211_ptr; |
704232c2 JB |
658 | struct cfg80211_registered_device *rdev; |
659 | ||
2a783c13 | 660 | if (!wdev) |
1f87f7d3 | 661 | return NOTIFY_DONE; |
704232c2 | 662 | |
2a783c13 | 663 | rdev = wiphy_to_dev(wdev->wiphy); |
704232c2 | 664 | |
2a783c13 | 665 | WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED); |
60719ffd | 666 | |
704232c2 | 667 | switch (state) { |
053a93dd MH |
668 | case NETDEV_POST_INIT: |
669 | SET_NETDEV_DEVTYPE(dev, &wiphy_type); | |
670 | break; | |
704232c2 | 671 | case NETDEV_REGISTER: |
0ff6ce7b JB |
672 | /* |
673 | * NB: cannot take rdev->mtx here because this may be | |
674 | * called within code protected by it when interfaces | |
675 | * are added with nl80211. | |
676 | */ | |
667503dd | 677 | mutex_init(&wdev->mtx); |
ad002395 | 678 | INIT_WORK(&wdev->cleanup_work, wdev_cleanup_work); |
667503dd JB |
679 | INIT_LIST_HEAD(&wdev->event_list); |
680 | spin_lock_init(&wdev->event_lock); | |
026331c4 JM |
681 | INIT_LIST_HEAD(&wdev->action_registrations); |
682 | spin_lock_init(&wdev->action_registrations_lock); | |
683 | ||
704232c2 | 684 | mutex_lock(&rdev->devlist_mtx); |
5f2aa25e | 685 | list_add_rcu(&wdev->list, &rdev->netdev_list); |
f5ea9120 | 686 | rdev->devlist_generation++; |
463d0183 JB |
687 | /* can only change netns with wiphy */ |
688 | dev->features |= NETIF_F_NETNS_LOCAL; | |
689 | ||
704232c2 JB |
690 | if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj, |
691 | "phy80211")) { | |
692 | printk(KERN_ERR "wireless: failed to add phy80211 " | |
693 | "symlink to netdev!\n"); | |
694 | } | |
2a783c13 | 695 | wdev->netdev = dev; |
b23aa676 | 696 | wdev->sme_state = CFG80211_SME_IDLE; |
bc92afd9 | 697 | mutex_unlock(&rdev->devlist_mtx); |
3d23e349 | 698 | #ifdef CONFIG_CFG80211_WEXT |
2a783c13 JB |
699 | wdev->wext.default_key = -1; |
700 | wdev->wext.default_mgmt_key = -1; | |
f2129354 | 701 | wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; |
ffb9eb3d KV |
702 | #endif |
703 | ||
5be83de5 | 704 | if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT) |
ffb9eb3d | 705 | wdev->ps = true; |
5be83de5 | 706 | else |
ffb9eb3d KV |
707 | wdev->ps = false; |
708 | wdev->ps_timeout = 100; | |
bc92afd9 JB |
709 | if (rdev->ops->set_power_mgmt) |
710 | if (rdev->ops->set_power_mgmt(wdev->wiphy, dev, | |
ffb9eb3d KV |
711 | wdev->ps, |
712 | wdev->ps_timeout)) { | |
bc92afd9 | 713 | /* assume this means it's off */ |
ffb9eb3d | 714 | wdev->ps = false; |
bc92afd9 | 715 | } |
ffb9eb3d | 716 | |
4890e3be JL |
717 | if (!dev->ethtool_ops) |
718 | dev->ethtool_ops = &cfg80211_ethtool_ops; | |
ad4bb6f8 JB |
719 | |
720 | if ((wdev->iftype == NL80211_IFTYPE_STATION || | |
721 | wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr) | |
722 | dev->priv_flags |= IFF_DONT_BRIDGE; | |
704232c2 | 723 | break; |
04a773ad | 724 | case NETDEV_GOING_DOWN: |
b23aa676 SO |
725 | switch (wdev->iftype) { |
726 | case NL80211_IFTYPE_ADHOC: | |
727 | cfg80211_leave_ibss(rdev, dev, true); | |
728 | break; | |
729 | case NL80211_IFTYPE_STATION: | |
667503dd | 730 | wdev_lock(wdev); |
3d23e349 | 731 | #ifdef CONFIG_CFG80211_WEXT |
f2129354 JB |
732 | kfree(wdev->wext.ie); |
733 | wdev->wext.ie = NULL; | |
734 | wdev->wext.ie_len = 0; | |
0eb14647 | 735 | wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; |
f2129354 | 736 | #endif |
667503dd JB |
737 | __cfg80211_disconnect(rdev, dev, |
738 | WLAN_REASON_DEAUTH_LEAVING, true); | |
19957bb3 | 739 | cfg80211_mlme_down(rdev, dev); |
667503dd | 740 | wdev_unlock(wdev); |
b23aa676 SO |
741 | break; |
742 | default: | |
743 | break; | |
744 | } | |
01a0ac41 JB |
745 | break; |
746 | case NETDEV_DOWN: | |
ad002395 | 747 | dev_hold(dev); |
e60d7443 | 748 | queue_work(cfg80211_wq, &wdev->cleanup_work); |
04a773ad JB |
749 | break; |
750 | case NETDEV_UP: | |
ad002395 JB |
751 | /* |
752 | * If we have a really quick DOWN/UP succession we may | |
753 | * have this work still pending ... cancel it and see | |
754 | * if it was pending, in which case we need to account | |
755 | * for some of the work it would have done. | |
756 | */ | |
757 | if (cancel_work_sync(&wdev->cleanup_work)) { | |
758 | mutex_lock(&rdev->devlist_mtx); | |
759 | rdev->opencount--; | |
760 | mutex_unlock(&rdev->devlist_mtx); | |
761 | dev_put(dev); | |
762 | } | |
667503dd | 763 | cfg80211_lock_rdev(rdev); |
aee83eaf | 764 | mutex_lock(&rdev->devlist_mtx); |
8c5d9808 | 765 | #ifdef CONFIG_CFG80211_WEXT |
667503dd | 766 | wdev_lock(wdev); |
f2129354 JB |
767 | switch (wdev->iftype) { |
768 | case NL80211_IFTYPE_ADHOC: | |
fffd0934 | 769 | cfg80211_ibss_wext_join(rdev, wdev); |
04a773ad | 770 | break; |
f2129354 | 771 | case NL80211_IFTYPE_STATION: |
fffd0934 | 772 | cfg80211_mgd_wext_connect(rdev, wdev); |
f2129354 JB |
773 | break; |
774 | default: | |
04a773ad | 775 | break; |
f2129354 | 776 | } |
667503dd | 777 | wdev_unlock(wdev); |
8c5d9808 | 778 | #endif |
ad002395 | 779 | rdev->opencount++; |
aee83eaf | 780 | mutex_unlock(&rdev->devlist_mtx); |
667503dd | 781 | cfg80211_unlock_rdev(rdev); |
2a783c13 | 782 | break; |
704232c2 | 783 | case NETDEV_UNREGISTER: |
0ff6ce7b JB |
784 | /* |
785 | * NB: cannot take rdev->mtx here because this may be | |
786 | * called within code protected by it when interfaces | |
787 | * are removed with nl80211. | |
788 | */ | |
704232c2 | 789 | mutex_lock(&rdev->devlist_mtx); |
e40cbdac JB |
790 | /* |
791 | * It is possible to get NETDEV_UNREGISTER | |
792 | * multiple times. To detect that, check | |
793 | * that the interface is still on the list | |
794 | * of registered interfaces, and only then | |
795 | * remove and clean it up. | |
796 | */ | |
2a783c13 | 797 | if (!list_empty(&wdev->list)) { |
704232c2 | 798 | sysfs_remove_link(&dev->dev.kobj, "phy80211"); |
5f2aa25e | 799 | list_del_rcu(&wdev->list); |
f5ea9120 | 800 | rdev->devlist_generation++; |
026331c4 | 801 | cfg80211_mlme_purge_actions(wdev); |
3d23e349 | 802 | #ifdef CONFIG_CFG80211_WEXT |
e40cbdac | 803 | kfree(wdev->wext.keys); |
fffd0934 | 804 | #endif |
e40cbdac JB |
805 | } |
806 | mutex_unlock(&rdev->devlist_mtx); | |
5f2aa25e JB |
807 | /* |
808 | * synchronise (so that we won't find this netdev | |
809 | * from other code any more) and then clear the list | |
810 | * head so that the above code can safely check for | |
811 | * !list_empty() to avoid double-cleanup. | |
812 | */ | |
813 | synchronize_rcu(); | |
814 | INIT_LIST_HEAD(&wdev->list); | |
704232c2 | 815 | break; |
1f87f7d3 | 816 | case NETDEV_PRE_UP: |
0b20633d JB |
817 | if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype))) |
818 | return notifier_from_errno(-EOPNOTSUPP); | |
1f87f7d3 JB |
819 | if (rfkill_blocked(rdev->rfkill)) |
820 | return notifier_from_errno(-ERFKILL); | |
821 | break; | |
704232c2 JB |
822 | } |
823 | ||
1f87f7d3 | 824 | return NOTIFY_DONE; |
704232c2 JB |
825 | } |
826 | ||
827 | static struct notifier_block cfg80211_netdev_notifier = { | |
828 | .notifier_call = cfg80211_netdev_notifier_call, | |
829 | }; | |
830 | ||
463d0183 JB |
831 | static void __net_exit cfg80211_pernet_exit(struct net *net) |
832 | { | |
833 | struct cfg80211_registered_device *rdev; | |
834 | ||
835 | rtnl_lock(); | |
836 | mutex_lock(&cfg80211_mutex); | |
837 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { | |
838 | if (net_eq(wiphy_net(&rdev->wiphy), net)) | |
839 | WARN_ON(cfg80211_switch_netns(rdev, &init_net)); | |
840 | } | |
841 | mutex_unlock(&cfg80211_mutex); | |
842 | rtnl_unlock(); | |
843 | } | |
844 | ||
845 | static struct pernet_operations cfg80211_pernet_ops = { | |
846 | .exit = cfg80211_pernet_exit, | |
847 | }; | |
848 | ||
849 | static int __init cfg80211_init(void) | |
704232c2 | 850 | { |
b2e1b302 LR |
851 | int err; |
852 | ||
463d0183 JB |
853 | err = register_pernet_device(&cfg80211_pernet_ops); |
854 | if (err) | |
855 | goto out_fail_pernet; | |
856 | ||
b2e1b302 | 857 | err = wiphy_sysfs_init(); |
704232c2 JB |
858 | if (err) |
859 | goto out_fail_sysfs; | |
860 | ||
861 | err = register_netdevice_notifier(&cfg80211_netdev_notifier); | |
862 | if (err) | |
863 | goto out_fail_notifier; | |
864 | ||
55682965 JB |
865 | err = nl80211_init(); |
866 | if (err) | |
867 | goto out_fail_nl80211; | |
868 | ||
704232c2 JB |
869 | ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL); |
870 | ||
b2e1b302 LR |
871 | err = regulatory_init(); |
872 | if (err) | |
873 | goto out_fail_reg; | |
874 | ||
e60d7443 AB |
875 | cfg80211_wq = create_singlethread_workqueue("cfg80211"); |
876 | if (!cfg80211_wq) | |
877 | goto out_fail_wq; | |
878 | ||
704232c2 JB |
879 | return 0; |
880 | ||
e60d7443 AB |
881 | out_fail_wq: |
882 | regulatory_exit(); | |
b2e1b302 LR |
883 | out_fail_reg: |
884 | debugfs_remove(ieee80211_debugfs_dir); | |
55682965 JB |
885 | out_fail_nl80211: |
886 | unregister_netdevice_notifier(&cfg80211_netdev_notifier); | |
704232c2 JB |
887 | out_fail_notifier: |
888 | wiphy_sysfs_exit(); | |
889 | out_fail_sysfs: | |
463d0183 JB |
890 | unregister_pernet_device(&cfg80211_pernet_ops); |
891 | out_fail_pernet: | |
704232c2 JB |
892 | return err; |
893 | } | |
3a462465 | 894 | subsys_initcall(cfg80211_init); |
704232c2 JB |
895 | |
896 | static void cfg80211_exit(void) | |
897 | { | |
898 | debugfs_remove(ieee80211_debugfs_dir); | |
55682965 | 899 | nl80211_exit(); |
704232c2 JB |
900 | unregister_netdevice_notifier(&cfg80211_netdev_notifier); |
901 | wiphy_sysfs_exit(); | |
b2e1b302 | 902 | regulatory_exit(); |
463d0183 | 903 | unregister_pernet_device(&cfg80211_pernet_ops); |
e60d7443 | 904 | destroy_workqueue(cfg80211_wq); |
704232c2 JB |
905 | } |
906 | module_exit(cfg80211_exit); |