Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...
[linux-2.6] / 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
177 static ssize_t ieee80211_if_fmt_flags(
178         const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
179 {
180         return scnprintf(buf, buflen, "%s%s%s%s%s%s%s\n",
181                  sdata->u.sta.flags & IEEE80211_STA_SSID_SET ? "SSID\n" : "",
182                  sdata->u.sta.flags & IEEE80211_STA_BSSID_SET ? "BSSID\n" : "",
183                  sdata->u.sta.flags & IEEE80211_STA_PREV_BSSID_SET ? "prev BSSID\n" : "",
184                  sdata->u.sta.flags & IEEE80211_STA_AUTHENTICATED ? "AUTH\n" : "",
185                  sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED ? "ASSOC\n" : "",
186                  sdata->u.sta.flags & IEEE80211_STA_PROBEREQ_POLL ? "PROBEREQ POLL\n" : "",
187                  sdata->bss_conf.use_cts_prot ? "CTS prot\n" : "");
188 }
189 __IEEE80211_IF_FILE(flags);
190
191 /* AP attributes */
192 IEEE80211_IF_FILE(num_sta_ps, u.ap.num_sta_ps, ATOMIC);
193 IEEE80211_IF_FILE(dtim_count, u.ap.dtim_count, DEC);
194
195 static ssize_t ieee80211_if_fmt_num_buffered_multicast(
196         const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
197 {
198         return scnprintf(buf, buflen, "%u\n",
199                          skb_queue_len(&sdata->u.ap.ps_bc_buf));
200 }
201 __IEEE80211_IF_FILE(num_buffered_multicast);
202
203 /* WDS attributes */
204 IEEE80211_IF_FILE(peer, u.wds.remote_addr, MAC);
205
206 #ifdef CONFIG_MAC80211_MESH
207 /* Mesh stats attributes */
208 IEEE80211_IF_FILE(fwded_frames, u.mesh.mshstats.fwded_frames, DEC);
209 IEEE80211_IF_FILE(dropped_frames_ttl, u.mesh.mshstats.dropped_frames_ttl, DEC);
210 IEEE80211_IF_FILE(dropped_frames_no_route,
211                 u.mesh.mshstats.dropped_frames_no_route, DEC);
212 IEEE80211_IF_FILE(estab_plinks, u.mesh.mshstats.estab_plinks, ATOMIC);
213
214 /* Mesh parameters */
215 IEEE80211_IF_WFILE(dot11MeshMaxRetries,
216                 u.mesh.mshcfg.dot11MeshMaxRetries, DEC, u8);
217 IEEE80211_IF_WFILE(dot11MeshRetryTimeout,
218                 u.mesh.mshcfg.dot11MeshRetryTimeout, DEC, u16);
219 IEEE80211_IF_WFILE(dot11MeshConfirmTimeout,
220                 u.mesh.mshcfg.dot11MeshConfirmTimeout, DEC, u16);
221 IEEE80211_IF_WFILE(dot11MeshHoldingTimeout,
222                 u.mesh.mshcfg.dot11MeshHoldingTimeout, DEC, u16);
223 IEEE80211_IF_WFILE(dot11MeshTTL, u.mesh.mshcfg.dot11MeshTTL, DEC, u8);
224 IEEE80211_IF_WFILE(auto_open_plinks, u.mesh.mshcfg.auto_open_plinks, DEC, u8);
225 IEEE80211_IF_WFILE(dot11MeshMaxPeerLinks,
226                 u.mesh.mshcfg.dot11MeshMaxPeerLinks, DEC, u16);
227 IEEE80211_IF_WFILE(dot11MeshHWMPactivePathTimeout,
228                 u.mesh.mshcfg.dot11MeshHWMPactivePathTimeout, DEC, u32);
229 IEEE80211_IF_WFILE(dot11MeshHWMPpreqMinInterval,
230                 u.mesh.mshcfg.dot11MeshHWMPpreqMinInterval, DEC, u16);
231 IEEE80211_IF_WFILE(dot11MeshHWMPnetDiameterTraversalTime,
232                 u.mesh.mshcfg.dot11MeshHWMPnetDiameterTraversalTime, DEC, u16);
233 IEEE80211_IF_WFILE(dot11MeshHWMPmaxPREQretries,
234                 u.mesh.mshcfg.dot11MeshHWMPmaxPREQretries, DEC, u8);
235 IEEE80211_IF_WFILE(path_refresh_time,
236                 u.mesh.mshcfg.path_refresh_time, DEC, u32);
237 IEEE80211_IF_WFILE(min_discovery_timeout,
238                 u.mesh.mshcfg.min_discovery_timeout, DEC, u16);
239 #endif
240
241
242 #define DEBUGFS_ADD(name, type)\
243         sdata->debugfs.type.name = debugfs_create_file(#name, 0400,\
244                 sdata->debugfsdir, sdata, &name##_ops);
245
246 static void add_sta_files(struct ieee80211_sub_if_data *sdata)
247 {
248         DEBUGFS_ADD(drop_unencrypted, sta);
249         DEBUGFS_ADD(force_unicast_rateidx, sta);
250         DEBUGFS_ADD(max_ratectrl_rateidx, sta);
251
252         DEBUGFS_ADD(state, sta);
253         DEBUGFS_ADD(bssid, sta);
254         DEBUGFS_ADD(prev_bssid, sta);
255         DEBUGFS_ADD(ssid_len, sta);
256         DEBUGFS_ADD(aid, sta);
257         DEBUGFS_ADD(ap_capab, sta);
258         DEBUGFS_ADD(capab, sta);
259         DEBUGFS_ADD(extra_ie_len, sta);
260         DEBUGFS_ADD(auth_tries, sta);
261         DEBUGFS_ADD(assoc_tries, sta);
262         DEBUGFS_ADD(auth_algs, sta);
263         DEBUGFS_ADD(auth_alg, sta);
264         DEBUGFS_ADD(auth_transaction, sta);
265         DEBUGFS_ADD(flags, sta);
266 }
267
268 static void add_ap_files(struct ieee80211_sub_if_data *sdata)
269 {
270         DEBUGFS_ADD(drop_unencrypted, ap);
271         DEBUGFS_ADD(force_unicast_rateidx, ap);
272         DEBUGFS_ADD(max_ratectrl_rateidx, ap);
273
274         DEBUGFS_ADD(num_sta_ps, ap);
275         DEBUGFS_ADD(dtim_count, ap);
276         DEBUGFS_ADD(num_buffered_multicast, ap);
277 }
278
279 static void add_wds_files(struct ieee80211_sub_if_data *sdata)
280 {
281         DEBUGFS_ADD(drop_unencrypted, wds);
282         DEBUGFS_ADD(force_unicast_rateidx, wds);
283         DEBUGFS_ADD(max_ratectrl_rateidx, wds);
284
285         DEBUGFS_ADD(peer, wds);
286 }
287
288 static void add_vlan_files(struct ieee80211_sub_if_data *sdata)
289 {
290         DEBUGFS_ADD(drop_unencrypted, vlan);
291         DEBUGFS_ADD(force_unicast_rateidx, vlan);
292         DEBUGFS_ADD(max_ratectrl_rateidx, vlan);
293 }
294
295 static void add_monitor_files(struct ieee80211_sub_if_data *sdata)
296 {
297 }
298
299 #ifdef CONFIG_MAC80211_MESH
300 #define MESHSTATS_ADD(name)\
301         sdata->mesh_stats.name = debugfs_create_file(#name, 0400,\
302                 sdata->mesh_stats_dir, sdata, &name##_ops);
303
304 static void add_mesh_stats(struct ieee80211_sub_if_data *sdata)
305 {
306         sdata->mesh_stats_dir = debugfs_create_dir("mesh_stats",
307                                 sdata->debugfsdir);
308         MESHSTATS_ADD(fwded_frames);
309         MESHSTATS_ADD(dropped_frames_ttl);
310         MESHSTATS_ADD(dropped_frames_no_route);
311         MESHSTATS_ADD(estab_plinks);
312 }
313
314 #define MESHPARAMS_ADD(name)\
315         sdata->mesh_config.name = debugfs_create_file(#name, 0600,\
316                 sdata->mesh_config_dir, sdata, &name##_ops);
317
318 static void add_mesh_config(struct ieee80211_sub_if_data *sdata)
319 {
320         sdata->mesh_config_dir = debugfs_create_dir("mesh_config",
321                                 sdata->debugfsdir);
322         MESHPARAMS_ADD(dot11MeshMaxRetries);
323         MESHPARAMS_ADD(dot11MeshRetryTimeout);
324         MESHPARAMS_ADD(dot11MeshConfirmTimeout);
325         MESHPARAMS_ADD(dot11MeshHoldingTimeout);
326         MESHPARAMS_ADD(dot11MeshTTL);
327         MESHPARAMS_ADD(auto_open_plinks);
328         MESHPARAMS_ADD(dot11MeshMaxPeerLinks);
329         MESHPARAMS_ADD(dot11MeshHWMPactivePathTimeout);
330         MESHPARAMS_ADD(dot11MeshHWMPpreqMinInterval);
331         MESHPARAMS_ADD(dot11MeshHWMPnetDiameterTraversalTime);
332         MESHPARAMS_ADD(dot11MeshHWMPmaxPREQretries);
333         MESHPARAMS_ADD(path_refresh_time);
334         MESHPARAMS_ADD(min_discovery_timeout);
335 }
336 #endif
337
338 static void add_files(struct ieee80211_sub_if_data *sdata)
339 {
340         if (!sdata->debugfsdir)
341                 return;
342
343         switch (sdata->vif.type) {
344         case NL80211_IFTYPE_MESH_POINT:
345 #ifdef CONFIG_MAC80211_MESH
346                 add_mesh_stats(sdata);
347                 add_mesh_config(sdata);
348 #endif
349                 break;
350         case NL80211_IFTYPE_STATION:
351         case NL80211_IFTYPE_ADHOC:
352                 add_sta_files(sdata);
353                 break;
354         case NL80211_IFTYPE_AP:
355                 add_ap_files(sdata);
356                 break;
357         case NL80211_IFTYPE_WDS:
358                 add_wds_files(sdata);
359                 break;
360         case NL80211_IFTYPE_MONITOR:
361                 add_monitor_files(sdata);
362                 break;
363         case NL80211_IFTYPE_AP_VLAN:
364                 add_vlan_files(sdata);
365                 break;
366         default:
367                 break;
368         }
369 }
370
371 #define DEBUGFS_DEL(name, type)                                 \
372         do {                                                    \
373                 debugfs_remove(sdata->debugfs.type.name);       \
374                 sdata->debugfs.type.name = NULL;                \
375         } while (0)
376
377 static void del_sta_files(struct ieee80211_sub_if_data *sdata)
378 {
379         DEBUGFS_DEL(drop_unencrypted, sta);
380         DEBUGFS_DEL(force_unicast_rateidx, sta);
381         DEBUGFS_DEL(max_ratectrl_rateidx, sta);
382
383         DEBUGFS_DEL(state, sta);
384         DEBUGFS_DEL(bssid, sta);
385         DEBUGFS_DEL(prev_bssid, sta);
386         DEBUGFS_DEL(ssid_len, sta);
387         DEBUGFS_DEL(aid, sta);
388         DEBUGFS_DEL(ap_capab, sta);
389         DEBUGFS_DEL(capab, sta);
390         DEBUGFS_DEL(extra_ie_len, sta);
391         DEBUGFS_DEL(auth_tries, sta);
392         DEBUGFS_DEL(assoc_tries, sta);
393         DEBUGFS_DEL(auth_algs, sta);
394         DEBUGFS_DEL(auth_alg, sta);
395         DEBUGFS_DEL(auth_transaction, sta);
396         DEBUGFS_DEL(flags, sta);
397 }
398
399 static void del_ap_files(struct ieee80211_sub_if_data *sdata)
400 {
401         DEBUGFS_DEL(drop_unencrypted, ap);
402         DEBUGFS_DEL(force_unicast_rateidx, ap);
403         DEBUGFS_DEL(max_ratectrl_rateidx, ap);
404
405         DEBUGFS_DEL(num_sta_ps, ap);
406         DEBUGFS_DEL(dtim_count, ap);
407         DEBUGFS_DEL(num_buffered_multicast, ap);
408 }
409
410 static void del_wds_files(struct ieee80211_sub_if_data *sdata)
411 {
412         DEBUGFS_DEL(drop_unencrypted, wds);
413         DEBUGFS_DEL(force_unicast_rateidx, wds);
414         DEBUGFS_DEL(max_ratectrl_rateidx, wds);
415
416         DEBUGFS_DEL(peer, wds);
417 }
418
419 static void del_vlan_files(struct ieee80211_sub_if_data *sdata)
420 {
421         DEBUGFS_DEL(drop_unencrypted, vlan);
422         DEBUGFS_DEL(force_unicast_rateidx, vlan);
423         DEBUGFS_DEL(max_ratectrl_rateidx, vlan);
424 }
425
426 static void del_monitor_files(struct ieee80211_sub_if_data *sdata)
427 {
428 }
429
430 #ifdef CONFIG_MAC80211_MESH
431 #define MESHSTATS_DEL(name)                     \
432         do {                                            \
433                 debugfs_remove(sdata->mesh_stats.name); \
434                 sdata->mesh_stats.name = NULL;          \
435         } while (0)
436
437 static void del_mesh_stats(struct ieee80211_sub_if_data *sdata)
438 {
439         MESHSTATS_DEL(fwded_frames);
440         MESHSTATS_DEL(dropped_frames_ttl);
441         MESHSTATS_DEL(dropped_frames_no_route);
442         MESHSTATS_DEL(estab_plinks);
443         debugfs_remove(sdata->mesh_stats_dir);
444         sdata->mesh_stats_dir = NULL;
445 }
446
447 #define MESHPARAMS_DEL(name)                    \
448         do {                                            \
449                 debugfs_remove(sdata->mesh_config.name);        \
450                 sdata->mesh_config.name = NULL;         \
451         } while (0)
452
453 static void del_mesh_config(struct ieee80211_sub_if_data *sdata)
454 {
455         MESHPARAMS_DEL(dot11MeshMaxRetries);
456         MESHPARAMS_DEL(dot11MeshRetryTimeout);
457         MESHPARAMS_DEL(dot11MeshConfirmTimeout);
458         MESHPARAMS_DEL(dot11MeshHoldingTimeout);
459         MESHPARAMS_DEL(dot11MeshTTL);
460         MESHPARAMS_DEL(auto_open_plinks);
461         MESHPARAMS_DEL(dot11MeshMaxPeerLinks);
462         MESHPARAMS_DEL(dot11MeshHWMPactivePathTimeout);
463         MESHPARAMS_DEL(dot11MeshHWMPpreqMinInterval);
464         MESHPARAMS_DEL(dot11MeshHWMPnetDiameterTraversalTime);
465         MESHPARAMS_DEL(dot11MeshHWMPmaxPREQretries);
466         MESHPARAMS_DEL(path_refresh_time);
467         MESHPARAMS_DEL(min_discovery_timeout);
468         debugfs_remove(sdata->mesh_config_dir);
469         sdata->mesh_config_dir = NULL;
470 }
471 #endif
472
473 static void del_files(struct ieee80211_sub_if_data *sdata)
474 {
475         if (!sdata->debugfsdir)
476                 return;
477
478         switch (sdata->vif.type) {
479         case NL80211_IFTYPE_MESH_POINT:
480 #ifdef CONFIG_MAC80211_MESH
481                 del_mesh_stats(sdata);
482                 del_mesh_config(sdata);
483 #endif
484                 break;
485         case NL80211_IFTYPE_STATION:
486         case NL80211_IFTYPE_ADHOC:
487                 del_sta_files(sdata);
488                 break;
489         case NL80211_IFTYPE_AP:
490                 del_ap_files(sdata);
491                 break;
492         case NL80211_IFTYPE_WDS:
493                 del_wds_files(sdata);
494                 break;
495         case NL80211_IFTYPE_MONITOR:
496                 del_monitor_files(sdata);
497                 break;
498         case NL80211_IFTYPE_AP_VLAN:
499                 del_vlan_files(sdata);
500                 break;
501         default:
502                 break;
503         }
504 }
505
506 static int notif_registered;
507
508 void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata)
509 {
510         char buf[10+IFNAMSIZ];
511
512         if (!notif_registered)
513                 return;
514
515         sprintf(buf, "netdev:%s", sdata->dev->name);
516         sdata->debugfsdir = debugfs_create_dir(buf,
517                 sdata->local->hw.wiphy->debugfsdir);
518         add_files(sdata);
519 }
520
521 void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata)
522 {
523         del_files(sdata);
524         debugfs_remove(sdata->debugfsdir);
525         sdata->debugfsdir = NULL;
526 }
527
528 static int netdev_notify(struct notifier_block *nb,
529                          unsigned long state,
530                          void *ndev)
531 {
532         struct net_device *dev = ndev;
533         struct dentry *dir;
534         struct ieee80211_sub_if_data *sdata;
535         char buf[10+IFNAMSIZ];
536
537         if (state != NETDEV_CHANGENAME)
538                 return 0;
539
540         if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
541                 return 0;
542
543         if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
544                 return 0;
545
546         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
547
548         dir = sdata->debugfsdir;
549
550         if (!dir)
551                 return 0;
552
553         sprintf(buf, "netdev:%s", dev->name);
554         if (!debugfs_rename(dir->d_parent, dir, dir->d_parent, buf))
555                 printk(KERN_ERR "mac80211: debugfs: failed to rename debugfs "
556                        "dir to %s\n", buf);
557
558         return 0;
559 }
560
561 static struct notifier_block mac80211_debugfs_netdev_notifier = {
562         .notifier_call = netdev_notify,
563 };
564
565 void ieee80211_debugfs_netdev_init(void)
566 {
567         int err;
568
569         err = register_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
570         if (err) {
571                 printk(KERN_ERR
572                        "mac80211: failed to install netdev notifier,"
573                        " disabling per-netdev debugfs!\n");
574         } else
575                 notif_registered = 1;
576 }
577
578 void ieee80211_debugfs_netdev_exit(void)
579 {
580         unregister_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
581         notif_registered = 0;
582 }