Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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
24static 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
45static 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) \
68static 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) \
75static 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) \
95static 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) \
103static 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) \
112static 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} \
120static 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) \
130static 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} \
138static 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} \
146static 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 */
158IEEE80211_IF_FILE(drop_unencrypted, drop_unencrypted, DEC);
159IEEE80211_IF_FILE(force_unicast_rateidx, force_unicast_rateidx, DEC);
160IEEE80211_IF_FILE(max_ratectrl_rateidx, max_ratectrl_rateidx, DEC);
161
162/* STA/IBSS attributes */
163IEEE80211_IF_FILE(state, u.sta.state, DEC);
164IEEE80211_IF_FILE(bssid, u.sta.bssid, MAC);
165IEEE80211_IF_FILE(prev_bssid, u.sta.prev_bssid, MAC);
166IEEE80211_IF_FILE(ssid_len, u.sta.ssid_len, SIZE);
167IEEE80211_IF_FILE(aid, u.sta.aid, DEC);
168IEEE80211_IF_FILE(ap_capab, u.sta.ap_capab, HEX);
169IEEE80211_IF_FILE(capab, u.sta.capab, HEX);
170IEEE80211_IF_FILE(extra_ie_len, u.sta.extra_ie_len, SIZE);
171IEEE80211_IF_FILE(auth_tries, u.sta.auth_tries, DEC);
172IEEE80211_IF_FILE(assoc_tries, u.sta.assoc_tries, DEC);
173IEEE80211_IF_FILE(auth_algs, u.sta.auth_algs, HEX);
174IEEE80211_IF_FILE(auth_alg, u.sta.auth_alg, DEC);
175IEEE80211_IF_FILE(auth_transaction, u.sta.auth_transaction, DEC);
176
177static 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 */
192IEEE80211_IF_FILE(num_sta_ps, u.ap.num_sta_ps, ATOMIC);
193IEEE80211_IF_FILE(dtim_count, u.ap.dtim_count, DEC);
194
195static 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 */
204IEEE80211_IF_FILE(peer, u.wds.remote_addr, MAC);
205
206#ifdef CONFIG_MAC80211_MESH
207/* Mesh stats attributes */
208IEEE80211_IF_FILE(fwded_frames, u.mesh.mshstats.fwded_frames, DEC);
209IEEE80211_IF_FILE(dropped_frames_ttl, u.mesh.mshstats.dropped_frames_ttl, DEC);
210IEEE80211_IF_FILE(dropped_frames_no_route,
211 u.mesh.mshstats.dropped_frames_no_route, DEC);
212IEEE80211_IF_FILE(estab_plinks, u.mesh.mshstats.estab_plinks, ATOMIC);
213
214/* Mesh parameters */
215IEEE80211_IF_WFILE(dot11MeshMaxRetries,
216 u.mesh.mshcfg.dot11MeshMaxRetries, DEC, u8);
217IEEE80211_IF_WFILE(dot11MeshRetryTimeout,
218 u.mesh.mshcfg.dot11MeshRetryTimeout, DEC, u16);
219IEEE80211_IF_WFILE(dot11MeshConfirmTimeout,
220 u.mesh.mshcfg.dot11MeshConfirmTimeout, DEC, u16);
221IEEE80211_IF_WFILE(dot11MeshHoldingTimeout,
222 u.mesh.mshcfg.dot11MeshHoldingTimeout, DEC, u16);
223IEEE80211_IF_WFILE(dot11MeshTTL, u.mesh.mshcfg.dot11MeshTTL, DEC, u8);
224IEEE80211_IF_WFILE(auto_open_plinks, u.mesh.mshcfg.auto_open_plinks, DEC, u8);
225IEEE80211_IF_WFILE(dot11MeshMaxPeerLinks,
226 u.mesh.mshcfg.dot11MeshMaxPeerLinks, DEC, u16);
227IEEE80211_IF_WFILE(dot11MeshHWMPactivePathTimeout,
228 u.mesh.mshcfg.dot11MeshHWMPactivePathTimeout, DEC, u32);
229IEEE80211_IF_WFILE(dot11MeshHWMPpreqMinInterval,
230 u.mesh.mshcfg.dot11MeshHWMPpreqMinInterval, DEC, u16);
231IEEE80211_IF_WFILE(dot11MeshHWMPnetDiameterTraversalTime,
232 u.mesh.mshcfg.dot11MeshHWMPnetDiameterTraversalTime, DEC, u16);
233IEEE80211_IF_WFILE(dot11MeshHWMPmaxPREQretries,
234 u.mesh.mshcfg.dot11MeshHWMPmaxPREQretries, DEC, u8);
235IEEE80211_IF_WFILE(path_refresh_time,
236 u.mesh.mshcfg.path_refresh_time, DEC, u32);
237IEEE80211_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
246static 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
268static 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
279static 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
288static 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
295static 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
304static 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
318static 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
338static 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
377static 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
399static 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
410static 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
419static 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
426static 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
437static 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
453static 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
473static 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
506static int notif_registered;
507
508void 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
521void 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
528static 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
561static struct notifier_block mac80211_debugfs_netdev_notifier = {
562 .notifier_call = netdev_notify,
563};
564
565void 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
578void ieee80211_debugfs_netdev_exit(void)
579{
580 unregister_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
581 notif_registered = 0;
582}