1 /*
2 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
3 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 */
9
10 #include <linux/kernel.h>
11 #include <linux/device.h>
12 #include <linux/if.h>
13 #include <linux/interrupt.h>
14 #include <linux/netdevice.h>
15 #include <linux/rtnetlink.h>
16 #include <linux/notifier.h>
17 #include <net/mac80211.h>
18 #include <net/cfg80211.h>
19 #include "ieee80211_i.h"
20 #include "rate.h"
21 #include "debugfs.h"
22 #include "debugfs_netdev.h"
23
ieee80211_if_read(struct ieee80211_sub_if_data * sdata,char __user * userbuf,size_t count,loff_t * ppos,ssize_t (* format)(const struct ieee80211_sub_if_data *,char *,int))24 static ssize_t ieee80211_if_read(
25 struct ieee80211_sub_if_data *sdata,
26 char __user *userbuf,
27 size_t count, loff_t *ppos,
28 ssize_t (*format)(const struct ieee80211_sub_if_data *, char *, int))
29 {
30 char buf[70];
31 ssize_t ret = -EINVAL;
32
33 read_lock(&dev_base_lock);
34 if (sdata->dev->reg_state == NETREG_REGISTERED)
35 ret = (*format)(sdata, buf, sizeof(buf));
36 read_unlock(&dev_base_lock);
37
38 if (ret != -EINVAL)
39 ret = simple_read_from_buffer(userbuf, count, ppos, buf, ret);
40
41 return ret;
42 }
43
44 #define IEEE80211_IF_FMT(name, field, format_string) \
45 static ssize_t ieee80211_if_fmt_##name( \
46 const struct ieee80211_sub_if_data *sdata, char *buf, \
47 int buflen) \
48 { \
49 return scnprintf(buf, buflen, format_string, sdata->field); \
50 }
51 #define IEEE80211_IF_FMT_DEC(name, field) \
52 IEEE80211_IF_FMT(name, field, "%d\n")
53 #define IEEE80211_IF_FMT_HEX(name, field) \
54 IEEE80211_IF_FMT(name, field, "%#x\n")
55 #define IEEE80211_IF_FMT_SIZE(name, field) \
56 IEEE80211_IF_FMT(name, field, "%zd\n")
57
58 #define IEEE80211_IF_FMT_ATOMIC(name, field) \
59 static ssize_t ieee80211_if_fmt_##name( \
60 const struct ieee80211_sub_if_data *sdata, \
61 char *buf, int buflen) \
62 { \
63 return scnprintf(buf, buflen, "%d\n", atomic_read(&sdata->field));\
64 }
65
66 #define IEEE80211_IF_FMT_MAC(name, field) \
67 static ssize_t ieee80211_if_fmt_##name( \
68 const struct ieee80211_sub_if_data *sdata, char *buf, \
69 int buflen) \
70 { \
71 return scnprintf(buf, buflen, "%pM\n", sdata->field); \
72 }
73
74 #define __IEEE80211_IF_FILE(name) \
75 static ssize_t ieee80211_if_read_##name(struct file *file, \
76 char __user *userbuf, \
77 size_t count, loff_t *ppos) \
78 { \
79 return ieee80211_if_read(file->private_data, \
80 userbuf, count, ppos, \
81 ieee80211_if_fmt_##name); \
82 } \
83 static const struct file_operations name##_ops = { \
84 .read = ieee80211_if_read_##name, \
85 .open = mac80211_open_file_generic, \
86 }
87
88 #define IEEE80211_IF_FILE(name, field, format) \
89 IEEE80211_IF_FMT_##format(name, field) \
90 __IEEE80211_IF_FILE(name)
91
92 /* common attributes */
93 IEEE80211_IF_FILE(drop_unencrypted, drop_unencrypted, DEC);
94 IEEE80211_IF_FILE(force_unicast_rateidx, force_unicast_rateidx, DEC);
95 IEEE80211_IF_FILE(max_ratectrl_rateidx, max_ratectrl_rateidx, DEC);
96
97 /* STA/IBSS attributes */
98 IEEE80211_IF_FILE(state, u.sta.state, DEC);
99 IEEE80211_IF_FILE(bssid, u.sta.bssid, MAC);
100 IEEE80211_IF_FILE(prev_bssid, u.sta.prev_bssid, MAC);
101 IEEE80211_IF_FILE(ssid_len, u.sta.ssid_len, SIZE);
102 IEEE80211_IF_FILE(aid, u.sta.aid, DEC);
103 IEEE80211_IF_FILE(ap_capab, u.sta.ap_capab, HEX);
104 IEEE80211_IF_FILE(capab, u.sta.capab, HEX);
105 IEEE80211_IF_FILE(extra_ie_len, u.sta.extra_ie_len, SIZE);
106 IEEE80211_IF_FILE(auth_tries, u.sta.auth_tries, DEC);
107 IEEE80211_IF_FILE(assoc_tries, u.sta.assoc_tries, DEC);
108 IEEE80211_IF_FILE(auth_algs, u.sta.auth_algs, HEX);
109 IEEE80211_IF_FILE(auth_alg, u.sta.auth_alg, DEC);
110 IEEE80211_IF_FILE(auth_transaction, u.sta.auth_transaction, DEC);
111
ieee80211_if_fmt_flags(const struct ieee80211_sub_if_data * sdata,char * buf,int buflen)112 static ssize_t ieee80211_if_fmt_flags(
113 const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
114 {
115 return scnprintf(buf, buflen, "%s%s%s%s%s%s%s\n",
116 sdata->u.sta.flags & IEEE80211_STA_SSID_SET ? "SSID\n" : "",
117 sdata->u.sta.flags & IEEE80211_STA_BSSID_SET ? "BSSID\n" : "",
118 sdata->u.sta.flags & IEEE80211_STA_PREV_BSSID_SET ? "prev BSSID\n" : "",
119 sdata->u.sta.flags & IEEE80211_STA_AUTHENTICATED ? "AUTH\n" : "",
120 sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED ? "ASSOC\n" : "",
121 sdata->u.sta.flags & IEEE80211_STA_PROBEREQ_POLL ? "PROBEREQ POLL\n" : "",
122 sdata->vif.bss_conf.use_cts_prot ? "CTS prot\n" : "");
123 }
124 __IEEE80211_IF_FILE(flags);
125
126 /* AP attributes */
127 IEEE80211_IF_FILE(num_sta_ps, u.ap.num_sta_ps, ATOMIC);
128 IEEE80211_IF_FILE(dtim_count, u.ap.dtim_count, DEC);
129
ieee80211_if_fmt_num_buffered_multicast(const struct ieee80211_sub_if_data * sdata,char * buf,int buflen)130 static ssize_t ieee80211_if_fmt_num_buffered_multicast(
131 const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
132 {
133 return scnprintf(buf, buflen, "%u\n",
134 skb_queue_len(&sdata->u.ap.ps_bc_buf));
135 }
136 __IEEE80211_IF_FILE(num_buffered_multicast);
137
138 /* WDS attributes */
139 IEEE80211_IF_FILE(peer, u.wds.remote_addr, MAC);
140
141 #ifdef CONFIG_MAC80211_MESH
142 /* Mesh stats attributes */
143 IEEE80211_IF_FILE(fwded_frames, u.mesh.mshstats.fwded_frames, DEC);
144 IEEE80211_IF_FILE(dropped_frames_ttl, u.mesh.mshstats.dropped_frames_ttl, DEC);
145 IEEE80211_IF_FILE(dropped_frames_no_route,
146 u.mesh.mshstats.dropped_frames_no_route, DEC);
147 IEEE80211_IF_FILE(estab_plinks, u.mesh.mshstats.estab_plinks, ATOMIC);
148
149 /* Mesh parameters */
150 IEEE80211_IF_FILE(dot11MeshMaxRetries,
151 u.mesh.mshcfg.dot11MeshMaxRetries, DEC);
152 IEEE80211_IF_FILE(dot11MeshRetryTimeout,
153 u.mesh.mshcfg.dot11MeshRetryTimeout, DEC);
154 IEEE80211_IF_FILE(dot11MeshConfirmTimeout,
155 u.mesh.mshcfg.dot11MeshConfirmTimeout, DEC);
156 IEEE80211_IF_FILE(dot11MeshHoldingTimeout,
157 u.mesh.mshcfg.dot11MeshHoldingTimeout, DEC);
158 IEEE80211_IF_FILE(dot11MeshTTL, u.mesh.mshcfg.dot11MeshTTL, DEC);
159 IEEE80211_IF_FILE(auto_open_plinks, u.mesh.mshcfg.auto_open_plinks, DEC);
160 IEEE80211_IF_FILE(dot11MeshMaxPeerLinks,
161 u.mesh.mshcfg.dot11MeshMaxPeerLinks, DEC);
162 IEEE80211_IF_FILE(dot11MeshHWMPactivePathTimeout,
163 u.mesh.mshcfg.dot11MeshHWMPactivePathTimeout, DEC);
164 IEEE80211_IF_FILE(dot11MeshHWMPpreqMinInterval,
165 u.mesh.mshcfg.dot11MeshHWMPpreqMinInterval, DEC);
166 IEEE80211_IF_FILE(dot11MeshHWMPnetDiameterTraversalTime,
167 u.mesh.mshcfg.dot11MeshHWMPnetDiameterTraversalTime, DEC);
168 IEEE80211_IF_FILE(dot11MeshHWMPmaxPREQretries,
169 u.mesh.mshcfg.dot11MeshHWMPmaxPREQretries, DEC);
170 IEEE80211_IF_FILE(path_refresh_time,
171 u.mesh.mshcfg.path_refresh_time, DEC);
172 IEEE80211_IF_FILE(min_discovery_timeout,
173 u.mesh.mshcfg.min_discovery_timeout, DEC);
174 #endif
175
176
177 #define DEBUGFS_ADD(name, type)\
178 sdata->debugfs.type.name = debugfs_create_file(#name, 0400,\
179 sdata->debugfsdir, sdata, &name##_ops);
180
add_sta_files(struct ieee80211_sub_if_data * sdata)181 static void add_sta_files(struct ieee80211_sub_if_data *sdata)
182 {
183 DEBUGFS_ADD(drop_unencrypted, sta);
184 DEBUGFS_ADD(force_unicast_rateidx, sta);
185 DEBUGFS_ADD(max_ratectrl_rateidx, sta);
186
187 DEBUGFS_ADD(state, sta);
188 DEBUGFS_ADD(bssid, sta);
189 DEBUGFS_ADD(prev_bssid, sta);
190 DEBUGFS_ADD(ssid_len, sta);
191 DEBUGFS_ADD(aid, sta);
192 DEBUGFS_ADD(ap_capab, sta);
193 DEBUGFS_ADD(capab, sta);
194 DEBUGFS_ADD(extra_ie_len, sta);
195 DEBUGFS_ADD(auth_tries, sta);
196 DEBUGFS_ADD(assoc_tries, sta);
197 DEBUGFS_ADD(auth_algs, sta);
198 DEBUGFS_ADD(auth_alg, sta);
199 DEBUGFS_ADD(auth_transaction, sta);
200 DEBUGFS_ADD(flags, sta);
201 }
202
add_ap_files(struct ieee80211_sub_if_data * sdata)203 static void add_ap_files(struct ieee80211_sub_if_data *sdata)
204 {
205 DEBUGFS_ADD(drop_unencrypted, ap);
206 DEBUGFS_ADD(force_unicast_rateidx, ap);
207 DEBUGFS_ADD(max_ratectrl_rateidx, ap);
208
209 DEBUGFS_ADD(num_sta_ps, ap);
210 DEBUGFS_ADD(dtim_count, ap);
211 DEBUGFS_ADD(num_buffered_multicast, ap);
212 }
213
add_wds_files(struct ieee80211_sub_if_data * sdata)214 static void add_wds_files(struct ieee80211_sub_if_data *sdata)
215 {
216 DEBUGFS_ADD(drop_unencrypted, wds);
217 DEBUGFS_ADD(force_unicast_rateidx, wds);
218 DEBUGFS_ADD(max_ratectrl_rateidx, wds);
219
220 DEBUGFS_ADD(peer, wds);
221 }
222
add_vlan_files(struct ieee80211_sub_if_data * sdata)223 static void add_vlan_files(struct ieee80211_sub_if_data *sdata)
224 {
225 DEBUGFS_ADD(drop_unencrypted, vlan);
226 DEBUGFS_ADD(force_unicast_rateidx, vlan);
227 DEBUGFS_ADD(max_ratectrl_rateidx, vlan);
228 }
229
add_monitor_files(struct ieee80211_sub_if_data * sdata)230 static void add_monitor_files(struct ieee80211_sub_if_data *sdata)
231 {
232 }
233
234 #ifdef CONFIG_MAC80211_MESH
235 #define MESHSTATS_ADD(name)\
236 sdata->mesh_stats.name = debugfs_create_file(#name, 0400,\
237 sdata->mesh_stats_dir, sdata, &name##_ops);
238
add_mesh_stats(struct ieee80211_sub_if_data * sdata)239 static void add_mesh_stats(struct ieee80211_sub_if_data *sdata)
240 {
241 sdata->mesh_stats_dir = debugfs_create_dir("mesh_stats",
242 sdata->debugfsdir);
243 MESHSTATS_ADD(fwded_frames);
244 MESHSTATS_ADD(dropped_frames_ttl);
245 MESHSTATS_ADD(dropped_frames_no_route);
246 MESHSTATS_ADD(estab_plinks);
247 }
248
249 #define MESHPARAMS_ADD(name)\
250 sdata->mesh_config.name = debugfs_create_file(#name, 0600,\
251 sdata->mesh_config_dir, sdata, &name##_ops);
252
add_mesh_config(struct ieee80211_sub_if_data * sdata)253 static void add_mesh_config(struct ieee80211_sub_if_data *sdata)
254 {
255 sdata->mesh_config_dir = debugfs_create_dir("mesh_config",
256 sdata->debugfsdir);
257 MESHPARAMS_ADD(dot11MeshMaxRetries);
258 MESHPARAMS_ADD(dot11MeshRetryTimeout);
259 MESHPARAMS_ADD(dot11MeshConfirmTimeout);
260 MESHPARAMS_ADD(dot11MeshHoldingTimeout);
261 MESHPARAMS_ADD(dot11MeshTTL);
262 MESHPARAMS_ADD(auto_open_plinks);
263 MESHPARAMS_ADD(dot11MeshMaxPeerLinks);
264 MESHPARAMS_ADD(dot11MeshHWMPactivePathTimeout);
265 MESHPARAMS_ADD(dot11MeshHWMPpreqMinInterval);
266 MESHPARAMS_ADD(dot11MeshHWMPnetDiameterTraversalTime);
267 MESHPARAMS_ADD(dot11MeshHWMPmaxPREQretries);
268 MESHPARAMS_ADD(path_refresh_time);
269 MESHPARAMS_ADD(min_discovery_timeout);
270 }
271 #endif
272
add_files(struct ieee80211_sub_if_data * sdata)273 static void add_files(struct ieee80211_sub_if_data *sdata)
274 {
275 if (!sdata->debugfsdir)
276 return;
277
278 switch (sdata->vif.type) {
279 case NL80211_IFTYPE_MESH_POINT:
280 #ifdef CONFIG_MAC80211_MESH
281 add_mesh_stats(sdata);
282 add_mesh_config(sdata);
283 #endif
284 break;
285 case NL80211_IFTYPE_STATION:
286 case NL80211_IFTYPE_ADHOC:
287 add_sta_files(sdata);
288 break;
289 case NL80211_IFTYPE_AP:
290 add_ap_files(sdata);
291 break;
292 case NL80211_IFTYPE_WDS:
293 add_wds_files(sdata);
294 break;
295 case NL80211_IFTYPE_MONITOR:
296 add_monitor_files(sdata);
297 break;
298 case NL80211_IFTYPE_AP_VLAN:
299 add_vlan_files(sdata);
300 break;
301 default:
302 break;
303 }
304 }
305
306 #define DEBUGFS_DEL(name, type) \
307 do { \
308 debugfs_remove(sdata->debugfs.type.name); \
309 sdata->debugfs.type.name = NULL; \
310 } while (0)
311
del_sta_files(struct ieee80211_sub_if_data * sdata)312 static void del_sta_files(struct ieee80211_sub_if_data *sdata)
313 {
314 DEBUGFS_DEL(drop_unencrypted, sta);
315 DEBUGFS_DEL(force_unicast_rateidx, sta);
316 DEBUGFS_DEL(max_ratectrl_rateidx, sta);
317
318 DEBUGFS_DEL(state, sta);
319 DEBUGFS_DEL(bssid, sta);
320 DEBUGFS_DEL(prev_bssid, sta);
321 DEBUGFS_DEL(ssid_len, sta);
322 DEBUGFS_DEL(aid, sta);
323 DEBUGFS_DEL(ap_capab, sta);
324 DEBUGFS_DEL(capab, sta);
325 DEBUGFS_DEL(extra_ie_len, sta);
326 DEBUGFS_DEL(auth_tries, sta);
327 DEBUGFS_DEL(assoc_tries, sta);
328 DEBUGFS_DEL(auth_algs, sta);
329 DEBUGFS_DEL(auth_alg, sta);
330 DEBUGFS_DEL(auth_transaction, sta);
331 DEBUGFS_DEL(flags, sta);
332 }
333
del_ap_files(struct ieee80211_sub_if_data * sdata)334 static void del_ap_files(struct ieee80211_sub_if_data *sdata)
335 {
336 DEBUGFS_DEL(drop_unencrypted, ap);
337 DEBUGFS_DEL(force_unicast_rateidx, ap);
338 DEBUGFS_DEL(max_ratectrl_rateidx, ap);
339
340 DEBUGFS_DEL(num_sta_ps, ap);
341 DEBUGFS_DEL(dtim_count, ap);
342 DEBUGFS_DEL(num_buffered_multicast, ap);
343 }
344
del_wds_files(struct ieee80211_sub_if_data * sdata)345 static void del_wds_files(struct ieee80211_sub_if_data *sdata)
346 {
347 DEBUGFS_DEL(drop_unencrypted, wds);
348 DEBUGFS_DEL(force_unicast_rateidx, wds);
349 DEBUGFS_DEL(max_ratectrl_rateidx, wds);
350
351 DEBUGFS_DEL(peer, wds);
352 }
353
del_vlan_files(struct ieee80211_sub_if_data * sdata)354 static void del_vlan_files(struct ieee80211_sub_if_data *sdata)
355 {
356 DEBUGFS_DEL(drop_unencrypted, vlan);
357 DEBUGFS_DEL(force_unicast_rateidx, vlan);
358 DEBUGFS_DEL(max_ratectrl_rateidx, vlan);
359 }
360
del_monitor_files(struct ieee80211_sub_if_data * sdata)361 static void del_monitor_files(struct ieee80211_sub_if_data *sdata)
362 {
363 }
364
365 #ifdef CONFIG_MAC80211_MESH
366 #define MESHSTATS_DEL(name) \
367 do { \
368 debugfs_remove(sdata->mesh_stats.name); \
369 sdata->mesh_stats.name = NULL; \
370 } while (0)
371
del_mesh_stats(struct ieee80211_sub_if_data * sdata)372 static void del_mesh_stats(struct ieee80211_sub_if_data *sdata)
373 {
374 MESHSTATS_DEL(fwded_frames);
375 MESHSTATS_DEL(dropped_frames_ttl);
376 MESHSTATS_DEL(dropped_frames_no_route);
377 MESHSTATS_DEL(estab_plinks);
378 debugfs_remove(sdata->mesh_stats_dir);
379 sdata->mesh_stats_dir = NULL;
380 }
381
382 #define MESHPARAMS_DEL(name) \
383 do { \
384 debugfs_remove(sdata->mesh_config.name); \
385 sdata->mesh_config.name = NULL; \
386 } while (0)
387
del_mesh_config(struct ieee80211_sub_if_data * sdata)388 static void del_mesh_config(struct ieee80211_sub_if_data *sdata)
389 {
390 MESHPARAMS_DEL(dot11MeshMaxRetries);
391 MESHPARAMS_DEL(dot11MeshRetryTimeout);
392 MESHPARAMS_DEL(dot11MeshConfirmTimeout);
393 MESHPARAMS_DEL(dot11MeshHoldingTimeout);
394 MESHPARAMS_DEL(dot11MeshTTL);
395 MESHPARAMS_DEL(auto_open_plinks);
396 MESHPARAMS_DEL(dot11MeshMaxPeerLinks);
397 MESHPARAMS_DEL(dot11MeshHWMPactivePathTimeout);
398 MESHPARAMS_DEL(dot11MeshHWMPpreqMinInterval);
399 MESHPARAMS_DEL(dot11MeshHWMPnetDiameterTraversalTime);
400 MESHPARAMS_DEL(dot11MeshHWMPmaxPREQretries);
401 MESHPARAMS_DEL(path_refresh_time);
402 MESHPARAMS_DEL(min_discovery_timeout);
403 debugfs_remove(sdata->mesh_config_dir);
404 sdata->mesh_config_dir = NULL;
405 }
406 #endif
407
del_files(struct ieee80211_sub_if_data * sdata)408 static void del_files(struct ieee80211_sub_if_data *sdata)
409 {
410 if (!sdata->debugfsdir)
411 return;
412
413 switch (sdata->vif.type) {
414 case NL80211_IFTYPE_MESH_POINT:
415 #ifdef CONFIG_MAC80211_MESH
416 del_mesh_stats(sdata);
417 del_mesh_config(sdata);
418 #endif
419 break;
420 case NL80211_IFTYPE_STATION:
421 case NL80211_IFTYPE_ADHOC:
422 del_sta_files(sdata);
423 break;
424 case NL80211_IFTYPE_AP:
425 del_ap_files(sdata);
426 break;
427 case NL80211_IFTYPE_WDS:
428 del_wds_files(sdata);
429 break;
430 case NL80211_IFTYPE_MONITOR:
431 del_monitor_files(sdata);
432 break;
433 case NL80211_IFTYPE_AP_VLAN:
434 del_vlan_files(sdata);
435 break;
436 default:
437 break;
438 }
439 }
440
441 static int notif_registered;
442
ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data * sdata)443 void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata)
444 {
445 char buf[10+IFNAMSIZ];
446
447 if (!notif_registered)
448 return;
449
450 sprintf(buf, "netdev:%s", sdata->dev->name);
451 sdata->debugfsdir = debugfs_create_dir(buf,
452 sdata->local->hw.wiphy->debugfsdir);
453 add_files(sdata);
454 }
455
ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data * sdata)456 void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata)
457 {
458 del_files(sdata);
459 debugfs_remove(sdata->debugfsdir);
460 sdata->debugfsdir = NULL;
461 }
462
netdev_notify(struct notifier_block * nb,unsigned long state,void * ndev)463 static int netdev_notify(struct notifier_block *nb,
464 unsigned long state,
465 void *ndev)
466 {
467 struct net_device *dev = ndev;
468 struct dentry *dir;
469 struct ieee80211_sub_if_data *sdata;
470 char buf[10+IFNAMSIZ];
471
472 if (state != NETDEV_CHANGENAME)
473 return 0;
474
475 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
476 return 0;
477
478 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
479 return 0;
480
481 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
482
483 dir = sdata->debugfsdir;
484
485 if (!dir)
486 return 0;
487
488 sprintf(buf, "netdev:%s", dev->name);
489 if (!debugfs_rename(dir->d_parent, dir, dir->d_parent, buf))
490 printk(KERN_ERR "mac80211: debugfs: failed to rename debugfs "
491 "dir to %s\n", buf);
492
493 return 0;
494 }
495
496 static struct notifier_block mac80211_debugfs_netdev_notifier = {
497 .notifier_call = netdev_notify,
498 };
499
ieee80211_debugfs_netdev_init(void)500 void ieee80211_debugfs_netdev_init(void)
501 {
502 int err;
503
504 err = register_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
505 if (err) {
506 printk(KERN_ERR
507 "mac80211: failed to install netdev notifier,"
508 " disabling per-netdev debugfs!\n");
509 } else
510 notif_registered = 1;
511 }
512
ieee80211_debugfs_netdev_exit(void)513 void ieee80211_debugfs_netdev_exit(void)
514 {
515 unregister_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
516 notif_registered = 0;
517 }
518