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 | ||
e9c0268f JP |
7 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
8 | ||
704232c2 JB |
9 | #include <linux/if.h> |
10 | #include <linux/module.h> | |
11 | #include <linux/err.h> | |
704232c2 | 12 | #include <linux/list.h> |
5a0e3ad6 | 13 | #include <linux/slab.h> |
704232c2 JB |
14 | #include <linux/nl80211.h> |
15 | #include <linux/debugfs.h> | |
16 | #include <linux/notifier.h> | |
17 | #include <linux/device.h> | |
16a832e7 | 18 | #include <linux/etherdevice.h> |
1f87f7d3 | 19 | #include <linux/rtnetlink.h> |
d43c36dc | 20 | #include <linux/sched.h> |
704232c2 JB |
21 | #include <net/genetlink.h> |
22 | #include <net/cfg80211.h> | |
55682965 | 23 | #include "nl80211.h" |
704232c2 JB |
24 | #include "core.h" |
25 | #include "sysfs.h" | |
1ac61302 | 26 | #include "debugfs.h" |
a9a11622 | 27 | #include "wext-compat.h" |
4890e3be | 28 | #include "ethtool.h" |
704232c2 JB |
29 | |
30 | /* name for sysfs, %d is appended */ | |
31 | #define PHY_NAME "phy" | |
32 | ||
33 | MODULE_AUTHOR("Johannes Berg"); | |
34 | MODULE_LICENSE("GPL"); | |
35 | MODULE_DESCRIPTION("wireless configuration support"); | |
36 | ||
5f2aa25e | 37 | /* RCU-protected (and cfg80211_mutex for writers) */ |
79c97e97 | 38 | LIST_HEAD(cfg80211_rdev_list); |
f5ea9120 | 39 | int cfg80211_rdev_list_generation; |
a1794390 | 40 | |
a1794390 | 41 | DEFINE_MUTEX(cfg80211_mutex); |
704232c2 JB |
42 | |
43 | /* for debugfs */ | |
44 | static struct dentry *ieee80211_debugfs_dir; | |
45 | ||
e60d7443 AB |
46 | /* for the cleanup, scan and event works */ |
47 | struct workqueue_struct *cfg80211_wq; | |
48 | ||
806a9e39 | 49 | /* requires cfg80211_mutex to be held! */ |
79c97e97 | 50 | struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx) |
55682965 | 51 | { |
79c97e97 | 52 | struct cfg80211_registered_device *result = NULL, *rdev; |
55682965 | 53 | |
85fd129a LR |
54 | if (!wiphy_idx_valid(wiphy_idx)) |
55 | return NULL; | |
56 | ||
761cf7ec LR |
57 | assert_cfg80211_lock(); |
58 | ||
79c97e97 JB |
59 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
60 | if (rdev->wiphy_idx == wiphy_idx) { | |
61 | result = rdev; | |
55682965 JB |
62 | break; |
63 | } | |
64 | } | |
65 | ||
66 | return result; | |
67 | } | |
68 | ||
806a9e39 LR |
69 | int get_wiphy_idx(struct wiphy *wiphy) |
70 | { | |
79c97e97 | 71 | struct cfg80211_registered_device *rdev; |
806a9e39 LR |
72 | if (!wiphy) |
73 | return WIPHY_IDX_STALE; | |
79c97e97 JB |
74 | rdev = wiphy_to_dev(wiphy); |
75 | return rdev->wiphy_idx; | |
806a9e39 LR |
76 | } |
77 | ||
79c97e97 | 78 | /* requires cfg80211_rdev_mutex to be held! */ |
806a9e39 LR |
79 | struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx) |
80 | { | |
79c97e97 | 81 | struct cfg80211_registered_device *rdev; |
806a9e39 LR |
82 | |
83 | if (!wiphy_idx_valid(wiphy_idx)) | |
84 | return NULL; | |
85 | ||
86 | assert_cfg80211_lock(); | |
87 | ||
79c97e97 JB |
88 | rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx); |
89 | if (!rdev) | |
806a9e39 | 90 | return NULL; |
79c97e97 | 91 | return &rdev->wiphy; |
806a9e39 LR |
92 | } |
93 | ||
a1794390 | 94 | /* requires cfg80211_mutex to be held! */ |
4bbf4d56 | 95 | struct cfg80211_registered_device * |
79c97e97 | 96 | __cfg80211_rdev_from_info(struct genl_info *info) |
55682965 JB |
97 | { |
98 | int ifindex; | |
b5850a7a | 99 | struct cfg80211_registered_device *bywiphyidx = NULL, *byifidx = NULL; |
55682965 JB |
100 | struct net_device *dev; |
101 | int err = -EINVAL; | |
102 | ||
761cf7ec LR |
103 | assert_cfg80211_lock(); |
104 | ||
55682965 | 105 | if (info->attrs[NL80211_ATTR_WIPHY]) { |
79c97e97 | 106 | bywiphyidx = cfg80211_rdev_by_wiphy_idx( |
55682965 JB |
107 | nla_get_u32(info->attrs[NL80211_ATTR_WIPHY])); |
108 | err = -ENODEV; | |
109 | } | |
110 | ||
111 | if (info->attrs[NL80211_ATTR_IFINDEX]) { | |
112 | ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]); | |
463d0183 | 113 | dev = dev_get_by_index(genl_info_net(info), ifindex); |
55682965 JB |
114 | if (dev) { |
115 | if (dev->ieee80211_ptr) | |
116 | byifidx = | |
117 | wiphy_to_dev(dev->ieee80211_ptr->wiphy); | |
118 | dev_put(dev); | |
119 | } | |
120 | err = -ENODEV; | |
121 | } | |
122 | ||
b5850a7a LR |
123 | if (bywiphyidx && byifidx) { |
124 | if (bywiphyidx != byifidx) | |
55682965 JB |
125 | return ERR_PTR(-EINVAL); |
126 | else | |
b5850a7a | 127 | return bywiphyidx; /* == byifidx */ |
55682965 | 128 | } |
b5850a7a LR |
129 | if (bywiphyidx) |
130 | return bywiphyidx; | |
55682965 JB |
131 | |
132 | if (byifidx) | |
133 | return byifidx; | |
134 | ||
135 | return ERR_PTR(err); | |
136 | } | |
137 | ||
138 | struct cfg80211_registered_device * | |
139 | cfg80211_get_dev_from_info(struct genl_info *info) | |
140 | { | |
79c97e97 | 141 | struct cfg80211_registered_device *rdev; |
55682965 | 142 | |
a1794390 | 143 | mutex_lock(&cfg80211_mutex); |
79c97e97 | 144 | rdev = __cfg80211_rdev_from_info(info); |
55682965 JB |
145 | |
146 | /* if it is not an error we grab the lock on | |
147 | * it to assure it won't be going away while | |
148 | * we operate on it */ | |
79c97e97 JB |
149 | if (!IS_ERR(rdev)) |
150 | mutex_lock(&rdev->mtx); | |
55682965 | 151 | |
a1794390 | 152 | mutex_unlock(&cfg80211_mutex); |
55682965 | 153 | |
79c97e97 | 154 | return rdev; |
55682965 JB |
155 | } |
156 | ||
157 | struct cfg80211_registered_device * | |
463d0183 | 158 | cfg80211_get_dev_from_ifindex(struct net *net, int ifindex) |
55682965 | 159 | { |
79c97e97 | 160 | struct cfg80211_registered_device *rdev = ERR_PTR(-ENODEV); |
55682965 JB |
161 | struct net_device *dev; |
162 | ||
a1794390 | 163 | mutex_lock(&cfg80211_mutex); |
463d0183 | 164 | dev = dev_get_by_index(net, ifindex); |
55682965 JB |
165 | if (!dev) |
166 | goto out; | |
167 | if (dev->ieee80211_ptr) { | |
79c97e97 JB |
168 | rdev = wiphy_to_dev(dev->ieee80211_ptr->wiphy); |
169 | mutex_lock(&rdev->mtx); | |
55682965 | 170 | } else |
79c97e97 | 171 | rdev = ERR_PTR(-ENODEV); |
55682965 JB |
172 | dev_put(dev); |
173 | out: | |
a1794390 | 174 | mutex_unlock(&cfg80211_mutex); |
79c97e97 | 175 | return rdev; |
55682965 JB |
176 | } |
177 | ||
4bbf4d56 | 178 | /* requires cfg80211_mutex to be held */ |
55682965 JB |
179 | int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, |
180 | char *newname) | |
181 | { | |
79c97e97 | 182 | struct cfg80211_registered_device *rdev2; |
7623225f | 183 | int wiphy_idx, taken = -1, result, digits; |
55682965 | 184 | |
4bbf4d56 | 185 | assert_cfg80211_lock(); |
2940bb69 | 186 | |
7623225f JB |
187 | /* prohibit calling the thing phy%d when %d is not its number */ |
188 | sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken); | |
189 | if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) { | |
190 | /* count number of places needed to print wiphy_idx */ | |
191 | digits = 1; | |
192 | while (wiphy_idx /= 10) | |
193 | digits++; | |
194 | /* | |
195 | * deny the name if it is phy<idx> where <idx> is printed | |
196 | * without leading zeroes. taken == strlen(newname) here | |
197 | */ | |
198 | if (taken == strlen(PHY_NAME) + digits) | |
199 | return -EINVAL; | |
200 | } | |
201 | ||
202 | ||
2940bb69 | 203 | /* Ignore nop renames */ |
2940bb69 | 204 | if (strcmp(newname, dev_name(&rdev->wiphy.dev)) == 0) |
4bbf4d56 | 205 | return 0; |
2940bb69 EB |
206 | |
207 | /* Ensure another device does not already have this name. */ | |
79c97e97 JB |
208 | list_for_each_entry(rdev2, &cfg80211_rdev_list, list) |
209 | if (strcmp(newname, dev_name(&rdev2->wiphy.dev)) == 0) | |
7623225f | 210 | return -EINVAL; |
55682965 | 211 | |
55682965 JB |
212 | result = device_rename(&rdev->wiphy.dev, newname); |
213 | if (result) | |
4bbf4d56 | 214 | return result; |
55682965 | 215 | |
33c0360b JB |
216 | if (rdev->wiphy.debugfsdir && |
217 | !debugfs_rename(rdev->wiphy.debugfsdir->d_parent, | |
55682965 JB |
218 | rdev->wiphy.debugfsdir, |
219 | rdev->wiphy.debugfsdir->d_parent, | |
220 | newname)) | |
e9c0268f | 221 | pr_err("failed to rename debugfs dir to %s!\n", newname); |
55682965 | 222 | |
4bbf4d56 | 223 | nl80211_notify_dev_rename(rdev); |
55682965 | 224 | |
4bbf4d56 | 225 | return 0; |
55682965 JB |
226 | } |
227 | ||
463d0183 JB |
228 | int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, |
229 | struct net *net) | |
230 | { | |
231 | struct wireless_dev *wdev; | |
232 | int err = 0; | |
233 | ||
5be83de5 | 234 | if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK)) |
463d0183 JB |
235 | return -EOPNOTSUPP; |
236 | ||
237 | list_for_each_entry(wdev, &rdev->netdev_list, list) { | |
238 | wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL; | |
239 | err = dev_change_net_namespace(wdev->netdev, net, "wlan%d"); | |
240 | if (err) | |
241 | break; | |
242 | wdev->netdev->features |= NETIF_F_NETNS_LOCAL; | |
243 | } | |
244 | ||
245 | if (err) { | |
246 | /* failed -- clean up to old netns */ | |
247 | net = wiphy_net(&rdev->wiphy); | |
248 | ||
249 | list_for_each_entry_continue_reverse(wdev, &rdev->netdev_list, | |
250 | list) { | |
251 | wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL; | |
252 | err = dev_change_net_namespace(wdev->netdev, net, | |
253 | "wlan%d"); | |
254 | WARN_ON(err); | |
255 | wdev->netdev->features |= NETIF_F_NETNS_LOCAL; | |
256 | } | |
04600794 JB |
257 | |
258 | return err; | |
463d0183 JB |
259 | } |
260 | ||
261 | wiphy_net_set(&rdev->wiphy, net); | |
262 | ||
04600794 JB |
263 | err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev)); |
264 | WARN_ON(err); | |
265 | ||
266 | return 0; | |
463d0183 JB |
267 | } |
268 | ||
1f87f7d3 JB |
269 | static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data) |
270 | { | |
79c97e97 | 271 | struct cfg80211_registered_device *rdev = data; |
1f87f7d3 | 272 | |
79c97e97 | 273 | rdev->ops->rfkill_poll(&rdev->wiphy); |
1f87f7d3 JB |
274 | } |
275 | ||
276 | static int cfg80211_rfkill_set_block(void *data, bool blocked) | |
277 | { | |
79c97e97 | 278 | struct cfg80211_registered_device *rdev = data; |
1f87f7d3 JB |
279 | struct wireless_dev *wdev; |
280 | ||
281 | if (!blocked) | |
282 | return 0; | |
283 | ||
284 | rtnl_lock(); | |
79c97e97 | 285 | mutex_lock(&rdev->devlist_mtx); |
1f87f7d3 | 286 | |
79c97e97 | 287 | list_for_each_entry(wdev, &rdev->netdev_list, list) |
1f87f7d3 JB |
288 | dev_close(wdev->netdev); |
289 | ||
79c97e97 | 290 | mutex_unlock(&rdev->devlist_mtx); |
1f87f7d3 JB |
291 | rtnl_unlock(); |
292 | ||
293 | return 0; | |
294 | } | |
295 | ||
296 | static void cfg80211_rfkill_sync_work(struct work_struct *work) | |
297 | { | |
79c97e97 | 298 | struct cfg80211_registered_device *rdev; |
1f87f7d3 | 299 | |
79c97e97 JB |
300 | rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync); |
301 | cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill)); | |
1f87f7d3 JB |
302 | } |
303 | ||
667503dd JB |
304 | static void cfg80211_event_work(struct work_struct *work) |
305 | { | |
306 | struct cfg80211_registered_device *rdev; | |
667503dd JB |
307 | |
308 | rdev = container_of(work, struct cfg80211_registered_device, | |
309 | event_work); | |
310 | ||
311 | rtnl_lock(); | |
312 | cfg80211_lock_rdev(rdev); | |
667503dd | 313 | |
3d54d255 | 314 | cfg80211_process_rdev_events(rdev); |
667503dd JB |
315 | cfg80211_unlock_rdev(rdev); |
316 | rtnl_unlock(); | |
317 | } | |
318 | ||
704232c2 JB |
319 | /* exported functions */ |
320 | ||
3dcf670b | 321 | struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv) |
704232c2 | 322 | { |
638af073 | 323 | static int wiphy_counter; |
7623225f JB |
324 | |
325 | struct cfg80211_registered_device *rdev; | |
704232c2 JB |
326 | int alloc_size; |
327 | ||
0b20633d JB |
328 | WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key)); |
329 | WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc)); | |
330 | WARN_ON(ops->connect && !ops->disconnect); | |
331 | WARN_ON(ops->join_ibss && !ops->leave_ibss); | |
332 | WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf); | |
333 | WARN_ON(ops->add_station && !ops->del_station); | |
334 | WARN_ON(ops->add_mpath && !ops->del_mpath); | |
29cbe68c | 335 | WARN_ON(ops->join_mesh && !ops->leave_mesh); |
41ade00f | 336 | |
79c97e97 | 337 | alloc_size = sizeof(*rdev) + sizeof_priv; |
704232c2 | 338 | |
79c97e97 JB |
339 | rdev = kzalloc(alloc_size, GFP_KERNEL); |
340 | if (!rdev) | |
704232c2 JB |
341 | return NULL; |
342 | ||
79c97e97 | 343 | rdev->ops = ops; |
704232c2 | 344 | |
a1794390 | 345 | mutex_lock(&cfg80211_mutex); |
704232c2 | 346 | |
79c97e97 | 347 | rdev->wiphy_idx = wiphy_counter++; |
a4d73ee1 | 348 | |
79c97e97 | 349 | if (unlikely(!wiphy_idx_valid(rdev->wiphy_idx))) { |
638af073 | 350 | wiphy_counter--; |
a1794390 | 351 | mutex_unlock(&cfg80211_mutex); |
7623225f | 352 | /* ugh, wrapped! */ |
79c97e97 | 353 | kfree(rdev); |
704232c2 JB |
354 | return NULL; |
355 | } | |
704232c2 | 356 | |
5a254ffe | 357 | mutex_unlock(&cfg80211_mutex); |
79c97e97 | 358 | |
7623225f JB |
359 | /* give it a proper name */ |
360 | dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx); | |
361 | ||
79c97e97 JB |
362 | mutex_init(&rdev->mtx); |
363 | mutex_init(&rdev->devlist_mtx); | |
364 | INIT_LIST_HEAD(&rdev->netdev_list); | |
365 | spin_lock_init(&rdev->bss_lock); | |
366 | INIT_LIST_HEAD(&rdev->bss_list); | |
367 | INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done); | |
368 | ||
3d23e349 JB |
369 | #ifdef CONFIG_CFG80211_WEXT |
370 | rdev->wiphy.wext = &cfg80211_wext_handler; | |
371 | #endif | |
372 | ||
79c97e97 JB |
373 | device_initialize(&rdev->wiphy.dev); |
374 | rdev->wiphy.dev.class = &ieee80211_class; | |
375 | rdev->wiphy.dev.platform_data = rdev; | |
376 | ||
5be83de5 JB |
377 | #ifdef CONFIG_CFG80211_DEFAULT_PS |
378 | rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT; | |
379 | #endif | |
16cb9d42 | 380 | |
463d0183 JB |
381 | wiphy_net_set(&rdev->wiphy, &init_net); |
382 | ||
79c97e97 JB |
383 | rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block; |
384 | rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev), | |
385 | &rdev->wiphy.dev, RFKILL_TYPE_WLAN, | |
386 | &rdev->rfkill_ops, rdev); | |
387 | ||
388 | if (!rdev->rfkill) { | |
389 | kfree(rdev); | |
1f87f7d3 JB |
390 | return NULL; |
391 | } | |
392 | ||
79c97e97 JB |
393 | INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work); |
394 | INIT_WORK(&rdev->conn_work, cfg80211_conn_work); | |
395 | INIT_WORK(&rdev->event_work, cfg80211_event_work); | |
1f87f7d3 | 396 | |
ad002395 JB |
397 | init_waitqueue_head(&rdev->dev_wait); |
398 | ||
b9a5f8ca JM |
399 | /* |
400 | * Initialize wiphy parameters to IEEE 802.11 MIB default values. | |
401 | * Fragmentation and RTS threshold are disabled by default with the | |
402 | * special -1 value. | |
403 | */ | |
79c97e97 JB |
404 | rdev->wiphy.retry_short = 7; |
405 | rdev->wiphy.retry_long = 4; | |
406 | rdev->wiphy.frag_threshold = (u32) -1; | |
407 | rdev->wiphy.rts_threshold = (u32) -1; | |
81077e82 | 408 | rdev->wiphy.coverage_class = 0; |
b9a5f8ca | 409 | |
79c97e97 | 410 | return &rdev->wiphy; |
704232c2 JB |
411 | } |
412 | EXPORT_SYMBOL(wiphy_new); | |
413 | ||
414 | int wiphy_register(struct wiphy *wiphy) | |
415 | { | |
79c97e97 | 416 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
704232c2 | 417 | int res; |
8318d78a JB |
418 | enum ieee80211_band band; |
419 | struct ieee80211_supported_band *sband; | |
420 | bool have_band = false; | |
421 | int i; | |
f59ac048 LR |
422 | u16 ifmodes = wiphy->interface_modes; |
423 | ||
ef15aac6 JB |
424 | if (WARN_ON(wiphy->addresses && !wiphy->n_addresses)) |
425 | return -EINVAL; | |
426 | ||
427 | if (WARN_ON(wiphy->addresses && | |
428 | !is_zero_ether_addr(wiphy->perm_addr) && | |
429 | memcmp(wiphy->perm_addr, wiphy->addresses[0].addr, | |
430 | ETH_ALEN))) | |
431 | return -EINVAL; | |
432 | ||
433 | if (wiphy->addresses) | |
434 | memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN); | |
435 | ||
f59ac048 LR |
436 | /* sanity check ifmodes */ |
437 | WARN_ON(!ifmodes); | |
2e161f78 | 438 | ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1; |
f59ac048 LR |
439 | if (WARN_ON(ifmodes != wiphy->interface_modes)) |
440 | wiphy->interface_modes = ifmodes; | |
8318d78a JB |
441 | |
442 | /* sanity check supported bands/channels */ | |
443 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
444 | sband = wiphy->bands[band]; | |
445 | if (!sband) | |
446 | continue; | |
447 | ||
448 | sband->band = band; | |
449 | ||
881d948c JB |
450 | if (WARN_ON(!sband->n_channels || !sband->n_bitrates)) |
451 | return -EINVAL; | |
452 | ||
453 | /* | |
454 | * Since we use a u32 for rate bitmaps in | |
455 | * ieee80211_get_response_rate, we cannot | |
456 | * have more than 32 legacy rates. | |
457 | */ | |
458 | if (WARN_ON(sband->n_bitrates > 32)) | |
8318d78a | 459 | return -EINVAL; |
8318d78a JB |
460 | |
461 | for (i = 0; i < sband->n_channels; i++) { | |
462 | sband->channels[i].orig_flags = | |
463 | sband->channels[i].flags; | |
464 | sband->channels[i].orig_mag = | |
465 | sband->channels[i].max_antenna_gain; | |
466 | sband->channels[i].orig_mpwr = | |
467 | sband->channels[i].max_power; | |
468 | sband->channels[i].band = band; | |
469 | } | |
470 | ||
471 | have_band = true; | |
472 | } | |
473 | ||
474 | if (!have_band) { | |
475 | WARN_ON(1); | |
476 | return -EINVAL; | |
477 | } | |
478 | ||
479 | /* check and set up bitrates */ | |
480 | ieee80211_set_bitrate_flags(wiphy); | |
481 | ||
5a652052 MB |
482 | mutex_lock(&cfg80211_mutex); |
483 | ||
79c97e97 | 484 | res = device_add(&rdev->wiphy.dev); |
c3d34d5d JL |
485 | if (res) { |
486 | mutex_unlock(&cfg80211_mutex); | |
487 | return res; | |
488 | } | |
1f87f7d3 | 489 | |
2f0accc1 JB |
490 | /* set up regulatory info */ |
491 | wiphy_update_regulatory(wiphy, NL80211_REGDOM_SET_BY_CORE); | |
492 | ||
5f2aa25e | 493 | list_add_rcu(&rdev->list, &cfg80211_rdev_list); |
f5ea9120 | 494 | cfg80211_rdev_list_generation++; |
704232c2 JB |
495 | |
496 | /* add to debugfs */ | |
79c97e97 JB |
497 | rdev->wiphy.debugfsdir = |
498 | debugfs_create_dir(wiphy_name(&rdev->wiphy), | |
704232c2 | 499 | ieee80211_debugfs_dir); |
79c97e97 JB |
500 | if (IS_ERR(rdev->wiphy.debugfsdir)) |
501 | rdev->wiphy.debugfsdir = NULL; | |
704232c2 | 502 | |
5be83de5 | 503 | if (wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) { |
73d54c9e LR |
504 | struct regulatory_request request; |
505 | ||
506 | request.wiphy_idx = get_wiphy_idx(wiphy); | |
507 | request.initiator = NL80211_REGDOM_SET_BY_DRIVER; | |
508 | request.alpha2[0] = '9'; | |
509 | request.alpha2[1] = '9'; | |
510 | ||
511 | nl80211_send_reg_change_event(&request); | |
512 | } | |
513 | ||
79c97e97 | 514 | cfg80211_debugfs_rdev_add(rdev); |
5a652052 | 515 | mutex_unlock(&cfg80211_mutex); |
1ac61302 | 516 | |
c3d34d5d JL |
517 | /* |
518 | * due to a locking dependency this has to be outside of the | |
519 | * cfg80211_mutex lock | |
520 | */ | |
521 | res = rfkill_register(rdev->rfkill); | |
522 | if (res) | |
523 | goto out_rm_dev; | |
524 | ||
2f0accc1 | 525 | return 0; |
1f87f7d3 | 526 | |
5a652052 | 527 | out_rm_dev: |
79c97e97 | 528 | device_del(&rdev->wiphy.dev); |
704232c2 JB |
529 | return res; |
530 | } | |
531 | EXPORT_SYMBOL(wiphy_register); | |
532 | ||
1f87f7d3 JB |
533 | void wiphy_rfkill_start_polling(struct wiphy *wiphy) |
534 | { | |
79c97e97 | 535 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
1f87f7d3 | 536 | |
79c97e97 | 537 | if (!rdev->ops->rfkill_poll) |
1f87f7d3 | 538 | return; |
79c97e97 JB |
539 | rdev->rfkill_ops.poll = cfg80211_rfkill_poll; |
540 | rfkill_resume_polling(rdev->rfkill); | |
1f87f7d3 JB |
541 | } |
542 | EXPORT_SYMBOL(wiphy_rfkill_start_polling); | |
543 | ||
544 | void wiphy_rfkill_stop_polling(struct wiphy *wiphy) | |
545 | { | |
79c97e97 | 546 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
1f87f7d3 | 547 | |
79c97e97 | 548 | rfkill_pause_polling(rdev->rfkill); |
1f87f7d3 JB |
549 | } |
550 | EXPORT_SYMBOL(wiphy_rfkill_stop_polling); | |
551 | ||
704232c2 JB |
552 | void wiphy_unregister(struct wiphy *wiphy) |
553 | { | |
79c97e97 | 554 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
704232c2 | 555 | |
79c97e97 | 556 | rfkill_unregister(rdev->rfkill); |
1f87f7d3 | 557 | |
f16bfc1c | 558 | /* protect the device list */ |
a1794390 | 559 | mutex_lock(&cfg80211_mutex); |
704232c2 | 560 | |
ad002395 JB |
561 | wait_event(rdev->dev_wait, ({ |
562 | int __count; | |
563 | mutex_lock(&rdev->devlist_mtx); | |
564 | __count = rdev->opencount; | |
565 | mutex_unlock(&rdev->devlist_mtx); | |
566 | __count == 0;})); | |
567 | ||
568 | mutex_lock(&rdev->devlist_mtx); | |
79c97e97 | 569 | BUG_ON(!list_empty(&rdev->netdev_list)); |
ad002395 JB |
570 | mutex_unlock(&rdev->devlist_mtx); |
571 | ||
572 | /* | |
573 | * First remove the hardware from everywhere, this makes | |
574 | * it impossible to find from userspace. | |
575 | */ | |
7bcfaf2f | 576 | debugfs_remove_recursive(rdev->wiphy.debugfsdir); |
5f2aa25e JB |
577 | list_del_rcu(&rdev->list); |
578 | synchronize_rcu(); | |
f16bfc1c JB |
579 | |
580 | /* | |
79c97e97 | 581 | * Try to grab rdev->mtx. If a command is still in progress, |
f16bfc1c JB |
582 | * hopefully the driver will refuse it since it's tearing |
583 | * down the device already. We wait for this command to complete | |
584 | * before unlinking the item from the list. | |
585 | * Note: as codified by the BUG_ON above we cannot get here if | |
ad002395 JB |
586 | * a virtual interface is still present. Hence, we can only get |
587 | * to lock contention here if userspace issues a command that | |
588 | * identified the hardware by wiphy index. | |
f16bfc1c | 589 | */ |
0ff6ce7b | 590 | cfg80211_lock_rdev(rdev); |
ad002395 | 591 | /* nothing */ |
0ff6ce7b | 592 | cfg80211_unlock_rdev(rdev); |
704232c2 | 593 | |
3f2355cb LR |
594 | /* If this device got a regulatory hint tell core its |
595 | * free to listen now to a new shiny device regulatory hint */ | |
596 | reg_device_remove(wiphy); | |
597 | ||
f5ea9120 | 598 | cfg80211_rdev_list_generation++; |
79c97e97 | 599 | device_del(&rdev->wiphy.dev); |
704232c2 | 600 | |
a1794390 | 601 | mutex_unlock(&cfg80211_mutex); |
6682588a | 602 | |
36e6fea8 | 603 | flush_work(&rdev->scan_done_wk); |
6682588a | 604 | cancel_work_sync(&rdev->conn_work); |
6682588a | 605 | flush_work(&rdev->event_work); |
704232c2 JB |
606 | } |
607 | EXPORT_SYMBOL(wiphy_unregister); | |
608 | ||
79c97e97 | 609 | void cfg80211_dev_free(struct cfg80211_registered_device *rdev) |
704232c2 | 610 | { |
2a519311 | 611 | struct cfg80211_internal_bss *scan, *tmp; |
79c97e97 JB |
612 | rfkill_destroy(rdev->rfkill); |
613 | mutex_destroy(&rdev->mtx); | |
614 | mutex_destroy(&rdev->devlist_mtx); | |
615 | list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list) | |
78c1c7e1 | 616 | cfg80211_put_bss(&scan->pub); |
79c97e97 | 617 | kfree(rdev); |
704232c2 JB |
618 | } |
619 | ||
620 | void wiphy_free(struct wiphy *wiphy) | |
621 | { | |
622 | put_device(&wiphy->dev); | |
623 | } | |
624 | EXPORT_SYMBOL(wiphy_free); | |
625 | ||
1f87f7d3 JB |
626 | void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked) |
627 | { | |
79c97e97 | 628 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
1f87f7d3 | 629 | |
79c97e97 JB |
630 | if (rfkill_set_hw_state(rdev->rfkill, blocked)) |
631 | schedule_work(&rdev->rfkill_sync); | |
1f87f7d3 JB |
632 | } |
633 | EXPORT_SYMBOL(wiphy_rfkill_set_hw_state); | |
634 | ||
ad002395 JB |
635 | static void wdev_cleanup_work(struct work_struct *work) |
636 | { | |
637 | struct wireless_dev *wdev; | |
638 | struct cfg80211_registered_device *rdev; | |
639 | ||
640 | wdev = container_of(work, struct wireless_dev, cleanup_work); | |
641 | rdev = wiphy_to_dev(wdev->wiphy); | |
642 | ||
643 | cfg80211_lock_rdev(rdev); | |
644 | ||
645 | if (WARN_ON(rdev->scan_req && rdev->scan_req->dev == wdev->netdev)) { | |
646 | rdev->scan_req->aborted = true; | |
01a0ac41 | 647 | ___cfg80211_scan_done(rdev, true); |
ad002395 JB |
648 | } |
649 | ||
650 | cfg80211_unlock_rdev(rdev); | |
651 | ||
652 | mutex_lock(&rdev->devlist_mtx); | |
653 | rdev->opencount--; | |
654 | mutex_unlock(&rdev->devlist_mtx); | |
655 | wake_up(&rdev->dev_wait); | |
656 | ||
657 | dev_put(wdev->netdev); | |
658 | } | |
659 | ||
053a93dd MH |
660 | static struct device_type wiphy_type = { |
661 | .name = "wlan", | |
662 | }; | |
663 | ||
704232c2 JB |
664 | static int cfg80211_netdev_notifier_call(struct notifier_block * nb, |
665 | unsigned long state, | |
666 | void *ndev) | |
667 | { | |
668 | struct net_device *dev = ndev; | |
2a783c13 | 669 | struct wireless_dev *wdev = dev->ieee80211_ptr; |
704232c2 JB |
670 | struct cfg80211_registered_device *rdev; |
671 | ||
2a783c13 | 672 | if (!wdev) |
1f87f7d3 | 673 | return NOTIFY_DONE; |
704232c2 | 674 | |
2a783c13 | 675 | rdev = wiphy_to_dev(wdev->wiphy); |
704232c2 | 676 | |
2a783c13 | 677 | WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED); |
60719ffd | 678 | |
704232c2 | 679 | switch (state) { |
053a93dd MH |
680 | case NETDEV_POST_INIT: |
681 | SET_NETDEV_DEVTYPE(dev, &wiphy_type); | |
682 | break; | |
704232c2 | 683 | case NETDEV_REGISTER: |
0ff6ce7b JB |
684 | /* |
685 | * NB: cannot take rdev->mtx here because this may be | |
686 | * called within code protected by it when interfaces | |
687 | * are added with nl80211. | |
688 | */ | |
667503dd | 689 | mutex_init(&wdev->mtx); |
ad002395 | 690 | INIT_WORK(&wdev->cleanup_work, wdev_cleanup_work); |
667503dd JB |
691 | INIT_LIST_HEAD(&wdev->event_list); |
692 | spin_lock_init(&wdev->event_lock); | |
2e161f78 JB |
693 | INIT_LIST_HEAD(&wdev->mgmt_registrations); |
694 | spin_lock_init(&wdev->mgmt_registrations_lock); | |
026331c4 | 695 | |
704232c2 | 696 | mutex_lock(&rdev->devlist_mtx); |
5f2aa25e | 697 | list_add_rcu(&wdev->list, &rdev->netdev_list); |
f5ea9120 | 698 | rdev->devlist_generation++; |
463d0183 JB |
699 | /* can only change netns with wiphy */ |
700 | dev->features |= NETIF_F_NETNS_LOCAL; | |
701 | ||
704232c2 JB |
702 | if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj, |
703 | "phy80211")) { | |
e9c0268f | 704 | pr_err("failed to add phy80211 symlink to netdev!\n"); |
704232c2 | 705 | } |
2a783c13 | 706 | wdev->netdev = dev; |
b23aa676 | 707 | wdev->sme_state = CFG80211_SME_IDLE; |
bc92afd9 | 708 | mutex_unlock(&rdev->devlist_mtx); |
3d23e349 | 709 | #ifdef CONFIG_CFG80211_WEXT |
2a783c13 JB |
710 | wdev->wext.default_key = -1; |
711 | wdev->wext.default_mgmt_key = -1; | |
f2129354 | 712 | wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; |
ffb9eb3d KV |
713 | #endif |
714 | ||
5be83de5 | 715 | if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT) |
ffb9eb3d | 716 | wdev->ps = true; |
5be83de5 | 717 | else |
ffb9eb3d | 718 | wdev->ps = false; |
9043f3b8 JO |
719 | /* allow mac80211 to determine the timeout */ |
720 | wdev->ps_timeout = -1; | |
bc92afd9 JB |
721 | if (rdev->ops->set_power_mgmt) |
722 | if (rdev->ops->set_power_mgmt(wdev->wiphy, dev, | |
ffb9eb3d KV |
723 | wdev->ps, |
724 | wdev->ps_timeout)) { | |
bc92afd9 | 725 | /* assume this means it's off */ |
ffb9eb3d | 726 | wdev->ps = false; |
bc92afd9 | 727 | } |
ffb9eb3d | 728 | |
4890e3be JL |
729 | if (!dev->ethtool_ops) |
730 | dev->ethtool_ops = &cfg80211_ethtool_ops; | |
ad4bb6f8 JB |
731 | |
732 | if ((wdev->iftype == NL80211_IFTYPE_STATION || | |
074ac8df | 733 | wdev->iftype == NL80211_IFTYPE_P2P_CLIENT || |
ad4bb6f8 JB |
734 | wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr) |
735 | dev->priv_flags |= IFF_DONT_BRIDGE; | |
704232c2 | 736 | break; |
04a773ad | 737 | case NETDEV_GOING_DOWN: |
b23aa676 SO |
738 | switch (wdev->iftype) { |
739 | case NL80211_IFTYPE_ADHOC: | |
740 | cfg80211_leave_ibss(rdev, dev, true); | |
741 | break; | |
074ac8df | 742 | case NL80211_IFTYPE_P2P_CLIENT: |
b23aa676 | 743 | case NL80211_IFTYPE_STATION: |
667503dd | 744 | wdev_lock(wdev); |
3d23e349 | 745 | #ifdef CONFIG_CFG80211_WEXT |
f2129354 JB |
746 | kfree(wdev->wext.ie); |
747 | wdev->wext.ie = NULL; | |
748 | wdev->wext.ie_len = 0; | |
0eb14647 | 749 | wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; |
f2129354 | 750 | #endif |
667503dd JB |
751 | __cfg80211_disconnect(rdev, dev, |
752 | WLAN_REASON_DEAUTH_LEAVING, true); | |
19957bb3 | 753 | cfg80211_mlme_down(rdev, dev); |
667503dd | 754 | wdev_unlock(wdev); |
b23aa676 | 755 | break; |
29cbe68c JB |
756 | case NL80211_IFTYPE_MESH_POINT: |
757 | cfg80211_leave_mesh(rdev, dev); | |
758 | break; | |
b23aa676 SO |
759 | default: |
760 | break; | |
761 | } | |
01a0ac41 JB |
762 | break; |
763 | case NETDEV_DOWN: | |
ad002395 | 764 | dev_hold(dev); |
e60d7443 | 765 | queue_work(cfg80211_wq, &wdev->cleanup_work); |
04a773ad JB |
766 | break; |
767 | case NETDEV_UP: | |
ad002395 JB |
768 | /* |
769 | * If we have a really quick DOWN/UP succession we may | |
770 | * have this work still pending ... cancel it and see | |
771 | * if it was pending, in which case we need to account | |
772 | * for some of the work it would have done. | |
773 | */ | |
774 | if (cancel_work_sync(&wdev->cleanup_work)) { | |
775 | mutex_lock(&rdev->devlist_mtx); | |
776 | rdev->opencount--; | |
777 | mutex_unlock(&rdev->devlist_mtx); | |
778 | dev_put(dev); | |
779 | } | |
667503dd | 780 | cfg80211_lock_rdev(rdev); |
aee83eaf | 781 | mutex_lock(&rdev->devlist_mtx); |
667503dd | 782 | wdev_lock(wdev); |
f2129354 | 783 | switch (wdev->iftype) { |
29cbe68c | 784 | #ifdef CONFIG_CFG80211_WEXT |
f2129354 | 785 | case NL80211_IFTYPE_ADHOC: |
fffd0934 | 786 | cfg80211_ibss_wext_join(rdev, wdev); |
04a773ad | 787 | break; |
f2129354 | 788 | case NL80211_IFTYPE_STATION: |
fffd0934 | 789 | cfg80211_mgd_wext_connect(rdev, wdev); |
f2129354 | 790 | break; |
29cbe68c | 791 | #endif |
c80d545d | 792 | #ifdef CONFIG_MAC80211_MESH |
29cbe68c | 793 | case NL80211_IFTYPE_MESH_POINT: |
c80d545d JC |
794 | { |
795 | /* backward compat code... */ | |
796 | struct mesh_setup setup; | |
797 | memcpy(&setup, &default_mesh_setup, | |
798 | sizeof(setup)); | |
799 | /* back compat only needed for mesh_id */ | |
800 | setup.mesh_id = wdev->ssid; | |
801 | setup.mesh_id_len = wdev->mesh_id_up_len; | |
802 | if (wdev->mesh_id_up_len) | |
803 | __cfg80211_join_mesh(rdev, dev, | |
804 | &setup, | |
805 | &default_mesh_config); | |
806 | break; | |
807 | } | |
808 | #endif | |
f2129354 | 809 | default: |
04a773ad | 810 | break; |
f2129354 | 811 | } |
667503dd | 812 | wdev_unlock(wdev); |
ad002395 | 813 | rdev->opencount++; |
aee83eaf | 814 | mutex_unlock(&rdev->devlist_mtx); |
667503dd | 815 | cfg80211_unlock_rdev(rdev); |
2a783c13 | 816 | break; |
704232c2 | 817 | case NETDEV_UNREGISTER: |
0ff6ce7b JB |
818 | /* |
819 | * NB: cannot take rdev->mtx here because this may be | |
820 | * called within code protected by it when interfaces | |
821 | * are removed with nl80211. | |
822 | */ | |
704232c2 | 823 | mutex_lock(&rdev->devlist_mtx); |
e40cbdac JB |
824 | /* |
825 | * It is possible to get NETDEV_UNREGISTER | |
826 | * multiple times. To detect that, check | |
827 | * that the interface is still on the list | |
828 | * of registered interfaces, and only then | |
829 | * remove and clean it up. | |
830 | */ | |
2a783c13 | 831 | if (!list_empty(&wdev->list)) { |
704232c2 | 832 | sysfs_remove_link(&dev->dev.kobj, "phy80211"); |
5f2aa25e | 833 | list_del_rcu(&wdev->list); |
f5ea9120 | 834 | rdev->devlist_generation++; |
2e161f78 | 835 | cfg80211_mlme_purge_registrations(wdev); |
3d23e349 | 836 | #ifdef CONFIG_CFG80211_WEXT |
e40cbdac | 837 | kfree(wdev->wext.keys); |
fffd0934 | 838 | #endif |
e40cbdac JB |
839 | } |
840 | mutex_unlock(&rdev->devlist_mtx); | |
5f2aa25e JB |
841 | /* |
842 | * synchronise (so that we won't find this netdev | |
843 | * from other code any more) and then clear the list | |
844 | * head so that the above code can safely check for | |
845 | * !list_empty() to avoid double-cleanup. | |
846 | */ | |
847 | synchronize_rcu(); | |
848 | INIT_LIST_HEAD(&wdev->list); | |
704232c2 | 849 | break; |
1f87f7d3 | 850 | case NETDEV_PRE_UP: |
0b20633d JB |
851 | if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype))) |
852 | return notifier_from_errno(-EOPNOTSUPP); | |
1f87f7d3 JB |
853 | if (rfkill_blocked(rdev->rfkill)) |
854 | return notifier_from_errno(-ERFKILL); | |
855 | break; | |
704232c2 JB |
856 | } |
857 | ||
1f87f7d3 | 858 | return NOTIFY_DONE; |
704232c2 JB |
859 | } |
860 | ||
861 | static struct notifier_block cfg80211_netdev_notifier = { | |
862 | .notifier_call = cfg80211_netdev_notifier_call, | |
863 | }; | |
864 | ||
463d0183 JB |
865 | static void __net_exit cfg80211_pernet_exit(struct net *net) |
866 | { | |
867 | struct cfg80211_registered_device *rdev; | |
868 | ||
869 | rtnl_lock(); | |
870 | mutex_lock(&cfg80211_mutex); | |
871 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { | |
872 | if (net_eq(wiphy_net(&rdev->wiphy), net)) | |
873 | WARN_ON(cfg80211_switch_netns(rdev, &init_net)); | |
874 | } | |
875 | mutex_unlock(&cfg80211_mutex); | |
876 | rtnl_unlock(); | |
877 | } | |
878 | ||
879 | static struct pernet_operations cfg80211_pernet_ops = { | |
880 | .exit = cfg80211_pernet_exit, | |
881 | }; | |
882 | ||
883 | static int __init cfg80211_init(void) | |
704232c2 | 884 | { |
b2e1b302 LR |
885 | int err; |
886 | ||
463d0183 JB |
887 | err = register_pernet_device(&cfg80211_pernet_ops); |
888 | if (err) | |
889 | goto out_fail_pernet; | |
890 | ||
b2e1b302 | 891 | err = wiphy_sysfs_init(); |
704232c2 JB |
892 | if (err) |
893 | goto out_fail_sysfs; | |
894 | ||
895 | err = register_netdevice_notifier(&cfg80211_netdev_notifier); | |
896 | if (err) | |
897 | goto out_fail_notifier; | |
898 | ||
55682965 JB |
899 | err = nl80211_init(); |
900 | if (err) | |
901 | goto out_fail_nl80211; | |
902 | ||
704232c2 JB |
903 | ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL); |
904 | ||
b2e1b302 LR |
905 | err = regulatory_init(); |
906 | if (err) | |
907 | goto out_fail_reg; | |
908 | ||
e60d7443 AB |
909 | cfg80211_wq = create_singlethread_workqueue("cfg80211"); |
910 | if (!cfg80211_wq) | |
911 | goto out_fail_wq; | |
912 | ||
704232c2 JB |
913 | return 0; |
914 | ||
e60d7443 AB |
915 | out_fail_wq: |
916 | regulatory_exit(); | |
b2e1b302 LR |
917 | out_fail_reg: |
918 | debugfs_remove(ieee80211_debugfs_dir); | |
55682965 JB |
919 | out_fail_nl80211: |
920 | unregister_netdevice_notifier(&cfg80211_netdev_notifier); | |
704232c2 JB |
921 | out_fail_notifier: |
922 | wiphy_sysfs_exit(); | |
923 | out_fail_sysfs: | |
463d0183 JB |
924 | unregister_pernet_device(&cfg80211_pernet_ops); |
925 | out_fail_pernet: | |
704232c2 JB |
926 | return err; |
927 | } | |
3a462465 | 928 | subsys_initcall(cfg80211_init); |
704232c2 | 929 | |
f884e387 | 930 | static void __exit cfg80211_exit(void) |
704232c2 JB |
931 | { |
932 | debugfs_remove(ieee80211_debugfs_dir); | |
55682965 | 933 | nl80211_exit(); |
704232c2 JB |
934 | unregister_netdevice_notifier(&cfg80211_netdev_notifier); |
935 | wiphy_sysfs_exit(); | |
b2e1b302 | 936 | regulatory_exit(); |
463d0183 | 937 | unregister_pernet_device(&cfg80211_pernet_ops); |
e60d7443 | 938 | destroy_workqueue(cfg80211_wq); |
704232c2 JB |
939 | } |
940 | module_exit(cfg80211_exit); |