dccp: Auto-load (when supported) CCID plugins for negotiation
[linux-2.6.git] / net / mac80211 / debugfs_netdev.c
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
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 #ifdef CONFIG_MAC80211_MESH
45 static ssize_t ieee80211_if_write(
46         struct ieee80211_sub_if_data *sdata,
47         char const __user *userbuf,
48         size_t count, loff_t *ppos,
49         int (*format)(struct ieee80211_sub_if_data *, char *))
50 {
51         char buf[10];
52         int buf_size;
53
54         memset(buf, 0x00, sizeof(buf));
55         buf_size = min(count, (sizeof(buf)-1));
56         if (copy_from_user(buf, userbuf, buf_size))
57                 return count;
58         read_lock(&dev_base_lock);
59         if (sdata->dev->reg_state == NETREG_REGISTERED)
60                 (*format)(sdata, buf);
61         read_unlock(&dev_base_lock);
62
63         return count;
64 }
65 #endif
66
67 #define IEEE80211_IF_FMT(name, field, format_string)                    \
68 static ssize_t ieee80211_if_fmt_##name(                                 \
69         const struct ieee80211_sub_if_data *sdata, char *buf,           \
70         int buflen)                                                     \
71 {                                                                       \
72         return scnprintf(buf, buflen, format_string, sdata->field);     \
73 }
74 #define IEEE80211_IF_WFMT(name, field, type)                            \
75 static int ieee80211_if_wfmt_##name(                                    \
76         struct ieee80211_sub_if_data *sdata, char *buf)                 \
77 {                                                                       \
78         unsigned long tmp;                                              \
79         char *endp;                                                     \
80                                                                         \
81         tmp = simple_strtoul(buf, &endp, 0);                            \
82         if ((endp == buf) || ((type)tmp != tmp))                        \
83                 return -EINVAL;                                         \
84         sdata->field = tmp;                                             \
85         return 0;                                                       \
86 }
87 #define IEEE80211_IF_FMT_DEC(name, field)                               \
88                 IEEE80211_IF_FMT(name, field, "%d\n")
89 #define IEEE80211_IF_FMT_HEX(name, field)                               \
90                 IEEE80211_IF_FMT(name, field, "%#x\n")
91 #define IEEE80211_IF_FMT_SIZE(name, field)                              \
92                 IEEE80211_IF_FMT(name, field, "%zd\n")
93
94 #define IEEE80211_IF_FMT_ATOMIC(name, field)                            \
95 static ssize_t ieee80211_if_fmt_##name(                                 \
96         const struct ieee80211_sub_if_data *sdata,                      \
97         char *buf, int buflen)                                          \
98 {                                                                       \
99         return scnprintf(buf, buflen, "%d\n", atomic_read(&sdata->field));\
100 }
101
102 #define IEEE80211_IF_FMT_MAC(name, field)                               \
103 static ssize_t ieee80211_if_fmt_##name(                                 \
104         const struct ieee80211_sub_if_data *sdata, char *buf,           \
105         int buflen)                                                     \
106 {                                                                       \
107         DECLARE_MAC_BUF(mac);                                           \
108         return scnprintf(buf, buflen, "%s\n", print_mac(mac, sdata->field));\
109 }
110
111 #define __IEEE80211_IF_FILE(name)                                       \
112 static ssize_t ieee80211_if_read_##name(struct file *file,              \
113                                         char __user *userbuf,           \
114                                         size_t count, loff_t *ppos)     \
115 {                                                                       \
116         return ieee80211_if_read(file->private_data,                    \
117                                  userbuf, count, ppos,                  \
118                                  ieee80211_if_fmt_##name);              \
119 }                                                                       \
120 static const struct file_operations name##_ops = {                      \
121         .read = ieee80211_if_read_##name,                               \
122         .open = mac80211_open_file_generic,                             \
123 }
124
125 #define IEEE80211_IF_FILE(name, field, format)                          \
126                 IEEE80211_IF_FMT_##format(name, field)                  \
127                 __IEEE80211_IF_FILE(name)
128
129 #define __IEEE80211_IF_WFILE(name)                                      \
130 static ssize_t ieee80211_if_read_##name(struct file *file,              \
131                                         char __user *userbuf,           \
132                                         size_t count, loff_t *ppos)     \
133 {                                                                       \
134         return ieee80211_if_read(file->private_data,                    \
135                                  userbuf, count, ppos,                  \
136                                  ieee80211_if_fmt_##name);              \
137 }                                                                       \
138 static ssize_t ieee80211_if_write_##name(struct file *file,             \
139                                         const char __user *userbuf,     \
140                                         size_t count, loff_t *ppos)     \
141 {                                                                       \
142         return ieee80211_if_write(file->private_data,                   \
143                                  userbuf, count, ppos,                  \
144                                  ieee80211_if_wfmt_##name);             \
145 }                                                                       \
146 static const struct file_operations name##_ops = {                      \
147         .read = ieee80211_if_read_##name,                               \
148         .write = ieee80211_if_write_##name,                             \
149         .open = mac80211_open_file_generic,                             \
150 }
151
152 #define IEEE80211_IF_WFILE(name, field, format, type)                   \
153                 IEEE80211_IF_FMT_##format(name, field)                  \
154                 IEEE80211_IF_WFMT(name, field, type)                    \
155                 __IEEE80211_IF_WFILE(name)
156
157 /* common attributes */
158 IEEE80211_IF_FILE(drop_unencrypted, drop_unencrypted, DEC);
159 IEEE80211_IF_FILE(force_unicast_rateidx, force_unicast_rateidx, DEC);
160 IEEE80211_IF_FILE(max_ratectrl_rateidx, max_ratectrl_rateidx, DEC);
161
162 /* STA/IBSS attributes */
163 IEEE80211_IF_FILE(state, u.sta.state, DEC);
164 IEEE80211_IF_FILE(bssid, u.sta.bssid, MAC);
165 IEEE80211_IF_FILE(prev_bssid, u.sta.prev_bssid, MAC);
166 IEEE80211_IF_FILE(ssid_len, u.sta.ssid_len, SIZE);
167 IEEE80211_IF_FILE(aid, u.sta.aid, DEC);
168 IEEE80211_IF_FILE(ap_capab, u.sta.ap_capab, HEX);
169 IEEE80211_IF_FILE(capab, u.sta.capab, HEX);
170 IEEE80211_IF_FILE(extra_ie_len, u.sta.extra_ie_len, SIZE);
171 IEEE80211_IF_FILE(auth_tries, u.sta.auth_tries, DEC);
172 IEEE80211_IF_FILE(assoc_tries, u.sta.assoc_tries, DEC);
173 IEEE80211_IF_FILE(auth_algs, u.sta.auth_algs, HEX);
174 IEEE80211_IF_FILE(auth_alg, u.sta.auth_alg, DEC);
175 IEEE80211_IF_FILE(auth_transaction, u.sta.auth_transaction, DEC);
176 IEEE80211_IF_FILE(num_beacons_sta, u.sta.num_beacons, DEC);
177
178 static ssize_t ieee80211_if_fmt_flags(
179         const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
180 {
181         return scnprintf(buf, buflen, "%s%s%s%s%s%s%s\n",
182                  sdata->u.sta.flags & IEEE80211_STA_SSID_SET ? "SSID\n" : "",
183                  sdata->u.sta.flags & IEEE80211_STA_BSSID_SET ? "BSSID\n" : "",
184                  sdata->u.sta.flags & IEEE80211_STA_PREV_BSSID_SET ? "prev BSSID\n" : "",
185                  sdata->u.sta.flags & IEEE80211_STA_AUTHENTICATED ? "AUTH\n" : "",
186                  sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED ? "ASSOC\n" : "",
187                  sdata->u.sta.flags & IEEE80211_STA_PROBEREQ_POLL ? "PROBEREQ POLL\n" : "",
188                  sdata->bss_conf.use_cts_prot ? "CTS prot\n" : "");
189 }
190 __IEEE80211_IF_FILE(flags);
191
192 /* AP attributes */
193 IEEE80211_IF_FILE(num_sta_ps, u.ap.num_sta_ps, ATOMIC);
194 IEEE80211_IF_FILE(dtim_count, u.ap.dtim_count, DEC);
195 IEEE80211_IF_FILE(num_beacons, u.ap.num_beacons, DEC);
196
197 static ssize_t ieee80211_if_fmt_num_buffered_multicast(
198         const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
199 {
200         return scnprintf(buf, buflen, "%u\n",
201                          skb_queue_len(&sdata->u.ap.ps_bc_buf));
202 }
203 __IEEE80211_IF_FILE(num_buffered_multicast);
204
205 /* WDS attributes */
206 IEEE80211_IF_FILE(peer, u.wds.remote_addr, MAC);
207
208 #ifdef CONFIG_MAC80211_MESH
209 /* Mesh stats attributes */
210 IEEE80211_IF_FILE(fwded_frames, u.sta.mshstats.fwded_frames, DEC);
211 IEEE80211_IF_FILE(dropped_frames_ttl, u.sta.mshstats.dropped_frames_ttl, DEC);
212 IEEE80211_IF_FILE(dropped_frames_no_route,
213                 u.sta.mshstats.dropped_frames_no_route, DEC);
214 IEEE80211_IF_FILE(estab_plinks, u.sta.mshstats.estab_plinks, ATOMIC);
215
216 /* Mesh parameters */
217 IEEE80211_IF_WFILE(dot11MeshMaxRetries,
218                 u.sta.mshcfg.dot11MeshMaxRetries, DEC, u8);
219 IEEE80211_IF_WFILE(dot11MeshRetryTimeout,
220                 u.sta.mshcfg.dot11MeshRetryTimeout, DEC, u16);
221 IEEE80211_IF_WFILE(dot11MeshConfirmTimeout,
222                 u.sta.mshcfg.dot11MeshConfirmTimeout, DEC, u16);
223 IEEE80211_IF_WFILE(dot11MeshHoldingTimeout,
224                 u.sta.mshcfg.dot11MeshHoldingTimeout, DEC, u16);
225 IEEE80211_IF_WFILE(dot11MeshTTL, u.sta.mshcfg.dot11MeshTTL, DEC, u8);
226 IEEE80211_IF_WFILE(auto_open_plinks, u.sta.mshcfg.auto_open_plinks, DEC, u8);
227 IEEE80211_IF_WFILE(dot11MeshMaxPeerLinks,
228                 u.sta.mshcfg.dot11MeshMaxPeerLinks, DEC, u16);
229 IEEE80211_IF_WFILE(dot11MeshHWMPactivePathTimeout,
230                 u.sta.mshcfg.dot11MeshHWMPactivePathTimeout, DEC, u32);
231 IEEE80211_IF_WFILE(dot11MeshHWMPpreqMinInterval,
232                 u.sta.mshcfg.dot11MeshHWMPpreqMinInterval, DEC, u16);
233 IEEE80211_IF_WFILE(dot11MeshHWMPnetDiameterTraversalTime,
234                 u.sta.mshcfg.dot11MeshHWMPnetDiameterTraversalTime, DEC, u16);
235 IEEE80211_IF_WFILE(dot11MeshHWMPmaxPREQretries,
236                 u.sta.mshcfg.dot11MeshHWMPmaxPREQretries, DEC, u8);
237 IEEE80211_IF_WFILE(path_refresh_time,
238                 u.sta.mshcfg.path_refresh_time, DEC, u32);
239 IEEE80211_IF_WFILE(min_discovery_timeout,
240                 u.sta.mshcfg.min_discovery_timeout, DEC, u16);
241 #endif
242
243
244 #define DEBUGFS_ADD(name, type)\
245         sdata->debugfs.type.name = debugfs_create_file(#name, 0400,\
246                 sdata->debugfsdir, sdata, &name##_ops);
247
248 static void add_sta_files(struct ieee80211_sub_if_data *sdata)
249 {
250         DEBUGFS_ADD(drop_unencrypted, sta);
251         DEBUGFS_ADD(force_unicast_rateidx, sta);
252         DEBUGFS_ADD(max_ratectrl_rateidx, sta);
253
254         DEBUGFS_ADD(state, sta);
255         DEBUGFS_ADD(bssid, sta);
256         DEBUGFS_ADD(prev_bssid, sta);
257         DEBUGFS_ADD(ssid_len, sta);
258         DEBUGFS_ADD(aid, sta);
259         DEBUGFS_ADD(ap_capab, sta);
260         DEBUGFS_ADD(capab, sta);
261         DEBUGFS_ADD(extra_ie_len, sta);
262         DEBUGFS_ADD(auth_tries, sta);
263         DEBUGFS_ADD(assoc_tries, sta);
264         DEBUGFS_ADD(auth_algs, sta);
265         DEBUGFS_ADD(auth_alg, sta);
266         DEBUGFS_ADD(auth_transaction, sta);
267         DEBUGFS_ADD(flags, sta);
268         DEBUGFS_ADD(num_beacons_sta, sta);
269 }
270
271 static void add_ap_files(struct ieee80211_sub_if_data *sdata)
272 {
273         DEBUGFS_ADD(drop_unencrypted, ap);
274         DEBUGFS_ADD(force_unicast_rateidx, ap);
275         DEBUGFS_ADD(max_ratectrl_rateidx, ap);
276
277         DEBUGFS_ADD(num_sta_ps, ap);
278         DEBUGFS_ADD(dtim_count, ap);
279         DEBUGFS_ADD(num_beacons, ap);
280         DEBUGFS_ADD(num_buffered_multicast, ap);
281 }
282
283 static void add_wds_files(struct ieee80211_sub_if_data *sdata)
284 {
285         DEBUGFS_ADD(drop_unencrypted, wds);
286         DEBUGFS_ADD(force_unicast_rateidx, wds);
287         DEBUGFS_ADD(max_ratectrl_rateidx, wds);
288
289         DEBUGFS_ADD(peer, wds);
290 }
291
292 static void add_vlan_files(struct ieee80211_sub_if_data *sdata)
293 {
294         DEBUGFS_ADD(drop_unencrypted, vlan);
295         DEBUGFS_ADD(force_unicast_rateidx, vlan);
296         DEBUGFS_ADD(max_ratectrl_rateidx, vlan);
297 }
298
299 static void add_monitor_files(struct ieee80211_sub_if_data *sdata)
300 {
301 }
302
303 #ifdef CONFIG_MAC80211_MESH
304 #define MESHSTATS_ADD(name)\
305         sdata->mesh_stats.name = debugfs_create_file(#name, 0400,\
306                 sdata->mesh_stats_dir, sdata, &name##_ops);
307
308 static void add_mesh_stats(struct ieee80211_sub_if_data *sdata)
309 {
310         sdata->mesh_stats_dir = debugfs_create_dir("mesh_stats",
311                                 sdata->debugfsdir);
312         MESHSTATS_ADD(fwded_frames);
313         MESHSTATS_ADD(dropped_frames_ttl);
314         MESHSTATS_ADD(dropped_frames_no_route);
315         MESHSTATS_ADD(estab_plinks);
316 }
317
318 #define MESHPARAMS_ADD(name)\
319         sdata->mesh_config.name = debugfs_create_file(#name, 0600,\
320                 sdata->mesh_config_dir, sdata, &name##_ops);
321
322 static void add_mesh_config(struct ieee80211_sub_if_data *sdata)
323 {
324         sdata->mesh_config_dir = debugfs_create_dir("mesh_config",
325                                 sdata->debugfsdir);
326         MESHPARAMS_ADD(dot11MeshMaxRetries);
327         MESHPARAMS_ADD(dot11MeshRetryTimeout);
328         MESHPARAMS_ADD(dot11MeshConfirmTimeout);
329         MESHPARAMS_ADD(dot11MeshHoldingTimeout);
330         MESHPARAMS_ADD(dot11MeshTTL);
331         MESHPARAMS_ADD(auto_open_plinks);
332         MESHPARAMS_ADD(dot11MeshMaxPeerLinks);
333         MESHPARAMS_ADD(dot11MeshHWMPactivePathTimeout);
334         MESHPARAMS_ADD(dot11MeshHWMPpreqMinInterval);
335         MESHPARAMS_ADD(dot11MeshHWMPnetDiameterTraversalTime);
336         MESHPARAMS_ADD(dot11MeshHWMPmaxPREQretries);
337         MESHPARAMS_ADD(path_refresh_time);
338         MESHPARAMS_ADD(min_discovery_timeout);
339 }
340 #endif
341
342 static void add_files(struct ieee80211_sub_if_data *sdata)
343 {
344         if (!sdata->debugfsdir)
345                 return;
346
347         switch (sdata->vif.type) {
348         case IEEE80211_IF_TYPE_MESH_POINT:
349 #ifdef CONFIG_MAC80211_MESH
350                 add_mesh_stats(sdata);
351                 add_mesh_config(sdata);
352 #endif
353                 /* fall through */
354         case IEEE80211_IF_TYPE_STA:
355         case IEEE80211_IF_TYPE_IBSS:
356                 add_sta_files(sdata);
357                 break;
358         case IEEE80211_IF_TYPE_AP:
359                 add_ap_files(sdata);
360                 break;
361         case IEEE80211_IF_TYPE_WDS:
362                 add_wds_files(sdata);
363                 break;
364         case IEEE80211_IF_TYPE_MNTR:
365                 add_monitor_files(sdata);
366                 break;
367         case IEEE80211_IF_TYPE_VLAN:
368                 add_vlan_files(sdata);
369                 break;
370         default:
371                 break;
372         }
373 }
374
375 #define DEBUGFS_DEL(name, type)                                 \
376         do {                                                    \
377                 debugfs_remove(sdata->debugfs.type.name);       \
378                 sdata->debugfs.type.name = NULL;                \
379         } while (0)
380
381 static void del_sta_files(struct ieee80211_sub_if_data *sdata)
382 {
383         DEBUGFS_DEL(drop_unencrypted, sta);
384         DEBUGFS_DEL(force_unicast_rateidx, sta);
385         DEBUGFS_DEL(max_ratectrl_rateidx, sta);
386
387         DEBUGFS_DEL(state, sta);
388         DEBUGFS_DEL(bssid, sta);
389         DEBUGFS_DEL(prev_bssid, sta);
390         DEBUGFS_DEL(ssid_len, sta);
391         DEBUGFS_DEL(aid, sta);
392         DEBUGFS_DEL(ap_capab, sta);
393         DEBUGFS_DEL(capab, sta);
394         DEBUGFS_DEL(extra_ie_len, sta);
395         DEBUGFS_DEL(auth_tries, sta);
396         DEBUGFS_DEL(assoc_tries, sta);
397         DEBUGFS_DEL(auth_algs, sta);
398         DEBUGFS_DEL(auth_alg, sta);
399         DEBUGFS_DEL(auth_transaction, sta);
400         DEBUGFS_DEL(flags, sta);
401         DEBUGFS_DEL(num_beacons_sta, sta);
402 }
403
404 static void del_ap_files(struct ieee80211_sub_if_data *sdata)
405 {
406         DEBUGFS_DEL(drop_unencrypted, ap);
407         DEBUGFS_DEL(force_unicast_rateidx, ap);
408         DEBUGFS_DEL(max_ratectrl_rateidx, ap);
409
410         DEBUGFS_DEL(num_sta_ps, ap);
411         DEBUGFS_DEL(dtim_count, ap);
412         DEBUGFS_DEL(num_beacons, ap);
413         DEBUGFS_DEL(num_buffered_multicast, ap);
414 }
415
416 static void del_wds_files(struct ieee80211_sub_if_data *sdata)
417 {
418         DEBUGFS_DEL(drop_unencrypted, wds);
419         DEBUGFS_DEL(force_unicast_rateidx, wds);
420         DEBUGFS_DEL(max_ratectrl_rateidx, wds);
421
422         DEBUGFS_DEL(peer, wds);
423 }
424
425 static void del_vlan_files(struct ieee80211_sub_if_data *sdata)
426 {
427         DEBUGFS_DEL(drop_unencrypted, vlan);
428         DEBUGFS_DEL(force_unicast_rateidx, vlan);
429         DEBUGFS_DEL(max_ratectrl_rateidx, vlan);
430 }
431
432 static void del_monitor_files(struct ieee80211_sub_if_data *sdata)
433 {
434 }
435
436 #ifdef CONFIG_MAC80211_MESH
437 #define MESHSTATS_DEL(name)                     \
438         do {                                            \
439                 debugfs_remove(sdata->mesh_stats.name); \
440                 sdata->mesh_stats.name = NULL;          \
441         } while (0)
442
443 static void del_mesh_stats(struct ieee80211_sub_if_data *sdata)
444 {
445         MESHSTATS_DEL(fwded_frames);
446         MESHSTATS_DEL(dropped_frames_ttl);
447         MESHSTATS_DEL(dropped_frames_no_route);
448         MESHSTATS_DEL(estab_plinks);
449         debugfs_remove(sdata->mesh_stats_dir);
450         sdata->mesh_stats_dir = NULL;
451 }
452
453 #define MESHPARAMS_DEL(name)                    \
454         do {                                            \
455                 debugfs_remove(sdata->mesh_config.name);        \
456                 sdata->mesh_config.name = NULL;         \
457         } while (0)
458
459 static void del_mesh_config(struct ieee80211_sub_if_data *sdata)
460 {
461         MESHPARAMS_DEL(dot11MeshMaxRetries);
462         MESHPARAMS_DEL(dot11MeshRetryTimeout);
463         MESHPARAMS_DEL(dot11MeshConfirmTimeout);
464         MESHPARAMS_DEL(dot11MeshHoldingTimeout);
465         MESHPARAMS_DEL(dot11MeshTTL);
466         MESHPARAMS_DEL(auto_open_plinks);
467         MESHPARAMS_DEL(dot11MeshMaxPeerLinks);
468         MESHPARAMS_DEL(dot11MeshHWMPactivePathTimeout);
469         MESHPARAMS_DEL(dot11MeshHWMPpreqMinInterval);
470         MESHPARAMS_DEL(dot11MeshHWMPnetDiameterTraversalTime);
471         MESHPARAMS_DEL(dot11MeshHWMPmaxPREQretries);
472         MESHPARAMS_DEL(path_refresh_time);
473         MESHPARAMS_DEL(min_discovery_timeout);
474         debugfs_remove(sdata->mesh_config_dir);
475         sdata->mesh_config_dir = NULL;
476 }
477 #endif
478
479 static void del_files(struct ieee80211_sub_if_data *sdata)
480 {
481         if (!sdata->debugfsdir)
482                 return;
483
484         switch (sdata->vif.type) {
485         case IEEE80211_IF_TYPE_MESH_POINT:
486 #ifdef CONFIG_MAC80211_MESH
487                 del_mesh_stats(sdata);
488                 del_mesh_config(sdata);
489 #endif
490                 /* fall through */
491         case IEEE80211_IF_TYPE_STA:
492         case IEEE80211_IF_TYPE_IBSS:
493                 del_sta_files(sdata);
494                 break;
495         case IEEE80211_IF_TYPE_AP:
496                 del_ap_files(sdata);
497                 break;
498         case IEEE80211_IF_TYPE_WDS:
499                 del_wds_files(sdata);
500                 break;
501         case IEEE80211_IF_TYPE_MNTR:
502                 del_monitor_files(sdata);
503                 break;
504         case IEEE80211_IF_TYPE_VLAN:
505                 del_vlan_files(sdata);
506                 break;
507         default:
508                 break;
509         }
510 }
511
512 static int notif_registered;
513
514 void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata)
515 {
516         char buf[10+IFNAMSIZ];
517
518         if (!notif_registered)
519                 return;
520
521         sprintf(buf, "netdev:%s", sdata->dev->name);
522         sdata->debugfsdir = debugfs_create_dir(buf,
523                 sdata->local->hw.wiphy->debugfsdir);
524         add_files(sdata);
525 }
526
527 void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata)
528 {
529         del_files(sdata);
530         debugfs_remove(sdata->debugfsdir);
531         sdata->debugfsdir = NULL;
532 }
533
534 static int netdev_notify(struct notifier_block *nb,
535                          unsigned long state,
536                          void *ndev)
537 {
538         struct net_device *dev = ndev;
539         struct dentry *dir;
540         struct ieee80211_sub_if_data *sdata;
541         char buf[10+IFNAMSIZ];
542
543         if (state != NETDEV_CHANGENAME)
544                 return 0;
545
546         if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
547                 return 0;
548
549         if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
550                 return 0;
551
552         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
553
554         sprintf(buf, "netdev:%s", dev->name);
555         dir = sdata->debugfsdir;
556         if (!debugfs_rename(dir->d_parent, dir, dir->d_parent, buf))
557                 printk(KERN_ERR "mac80211: debugfs: failed to rename debugfs "
558                        "dir to %s\n", buf);
559
560         return 0;
561 }
562
563 static struct notifier_block mac80211_debugfs_netdev_notifier = {
564         .notifier_call = netdev_notify,
565 };
566
567 void ieee80211_debugfs_netdev_init(void)
568 {
569         int err;
570
571         err = register_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
572         if (err) {
573                 printk(KERN_ERR
574                        "mac80211: failed to install netdev notifier,"
575                        " disabling per-netdev debugfs!\n");
576         } else
577                 notif_registered = 1;
578 }
579
580 void ieee80211_debugfs_netdev_exit(void)
581 {
582         unregister_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
583         notif_registered = 0;
584 }