2 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
3 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
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.
10 #include <linux/kernel.h>
11 #include <linux/device.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 "ieee80211_rate.h"
22 #include "debugfs_netdev.h"
24 static ssize_t
ieee80211_if_read(
25 struct ieee80211_sub_if_data
*sdata
,
27 size_t count
, loff_t
*ppos
,
28 ssize_t (*format
)(const struct ieee80211_sub_if_data
*, char *, int))
31 ssize_t ret
= -EINVAL
;
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
);
39 ret
= simple_read_from_buffer(userbuf
, count
, ppos
, buf
, ret
);
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 *))
54 memset(buf
, 0x00, sizeof(buf
));
55 buf_size
= min(count
, (sizeof(buf
)-1));
56 if (copy_from_user(buf
, userbuf
, buf_size
))
58 read_lock(&dev_base_lock
);
59 if (sdata
->dev
->reg_state
== NETREG_REGISTERED
)
60 (*format
)(sdata
, buf
);
61 read_unlock(&dev_base_lock
);
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, \
72 return scnprintf(buf, buflen, format_string, sdata->field); \
74 #define IEEE80211_IF_WFMT(name, field, type) \
75 static int ieee80211_if_wfmt_##name( \
76 struct ieee80211_sub_if_data *sdata, char *buf) \
81 tmp = simple_strtoul(buf, &endp, 0); \
82 if ((endp == buf) || ((type)tmp != tmp)) \
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")
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) \
99 return scnprintf(buf, buflen, "%d\n", atomic_read(&sdata->field));\
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, \
107 DECLARE_MAC_BUF(mac); \
108 return scnprintf(buf, buflen, "%s\n", print_mac(mac, sdata->field));\
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) \
116 return ieee80211_if_read(file->private_data, \
117 userbuf, count, ppos, \
118 ieee80211_if_fmt_##name); \
120 static const struct file_operations name##_ops = { \
121 .read = ieee80211_if_read_##name, \
122 .open = mac80211_open_file_generic, \
125 #define IEEE80211_IF_FILE(name, field, format) \
126 IEEE80211_IF_FMT_##format(name, field) \
127 __IEEE80211_IF_FILE(name)
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) \
134 return ieee80211_if_read(file->private_data, \
135 userbuf, count, ppos, \
136 ieee80211_if_fmt_##name); \
138 static ssize_t ieee80211_if_write_##name(struct file *file, \
139 const char __user *userbuf, \
140 size_t count, loff_t *ppos) \
142 return ieee80211_if_write(file->private_data, \
143 userbuf, count, ppos, \
144 ieee80211_if_wfmt_##name); \
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, \
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)
157 /* common attributes */
158 IEEE80211_IF_FILE(channel_use
, channel_use
, DEC
);
159 IEEE80211_IF_FILE(drop_unencrypted
, drop_unencrypted
, DEC
);
161 /* STA/IBSS attributes */
162 IEEE80211_IF_FILE(state
, u
.sta
.state
, DEC
);
163 IEEE80211_IF_FILE(bssid
, u
.sta
.bssid
, MAC
);
164 IEEE80211_IF_FILE(prev_bssid
, u
.sta
.prev_bssid
, MAC
);
165 IEEE80211_IF_FILE(ssid_len
, u
.sta
.ssid_len
, SIZE
);
166 IEEE80211_IF_FILE(aid
, u
.sta
.aid
, DEC
);
167 IEEE80211_IF_FILE(ap_capab
, u
.sta
.ap_capab
, HEX
);
168 IEEE80211_IF_FILE(capab
, u
.sta
.capab
, HEX
);
169 IEEE80211_IF_FILE(extra_ie_len
, u
.sta
.extra_ie_len
, SIZE
);
170 IEEE80211_IF_FILE(auth_tries
, u
.sta
.auth_tries
, DEC
);
171 IEEE80211_IF_FILE(assoc_tries
, u
.sta
.assoc_tries
, DEC
);
172 IEEE80211_IF_FILE(auth_algs
, u
.sta
.auth_algs
, HEX
);
173 IEEE80211_IF_FILE(auth_alg
, u
.sta
.auth_alg
, DEC
);
174 IEEE80211_IF_FILE(auth_transaction
, u
.sta
.auth_transaction
, DEC
);
175 IEEE80211_IF_FILE(num_beacons_sta
, u
.sta
.num_beacons
, DEC
);
177 static ssize_t
ieee80211_if_fmt_flags(
178 const struct ieee80211_sub_if_data
*sdata
, char *buf
, int buflen
)
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" : "");
189 __IEEE80211_IF_FILE(flags
);
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 IEEE80211_IF_FILE(num_beacons
, u
.ap
.num_beacons
, DEC
);
195 IEEE80211_IF_FILE(force_unicast_rateidx
, u
.ap
.force_unicast_rateidx
, DEC
);
196 IEEE80211_IF_FILE(max_ratectrl_rateidx
, u
.ap
.max_ratectrl_rateidx
, DEC
);
198 static ssize_t
ieee80211_if_fmt_num_buffered_multicast(
199 const struct ieee80211_sub_if_data
*sdata
, char *buf
, int buflen
)
201 return scnprintf(buf
, buflen
, "%u\n",
202 skb_queue_len(&sdata
->u
.ap
.ps_bc_buf
));
204 __IEEE80211_IF_FILE(num_buffered_multicast
);
207 IEEE80211_IF_FILE(peer
, u
.wds
.remote_addr
, MAC
);
209 #ifdef CONFIG_MAC80211_MESH
210 /* Mesh stats attributes */
211 IEEE80211_IF_FILE(fwded_frames
, u
.sta
.mshstats
.fwded_frames
, DEC
);
212 IEEE80211_IF_FILE(dropped_frames_ttl
, u
.sta
.mshstats
.dropped_frames_ttl
, DEC
);
213 IEEE80211_IF_FILE(dropped_frames_no_route
,
214 u
.sta
.mshstats
.dropped_frames_no_route
, DEC
);
215 IEEE80211_IF_FILE(estab_plinks
, u
.sta
.mshstats
.estab_plinks
, ATOMIC
);
217 /* Mesh parameters */
218 IEEE80211_IF_WFILE(dot11MeshMaxRetries
,
219 u
.sta
.mshcfg
.dot11MeshMaxRetries
, DEC
, u8
);
220 IEEE80211_IF_WFILE(dot11MeshRetryTimeout
,
221 u
.sta
.mshcfg
.dot11MeshRetryTimeout
, DEC
, u16
);
222 IEEE80211_IF_WFILE(dot11MeshConfirmTimeout
,
223 u
.sta
.mshcfg
.dot11MeshConfirmTimeout
, DEC
, u16
);
224 IEEE80211_IF_WFILE(dot11MeshHoldingTimeout
,
225 u
.sta
.mshcfg
.dot11MeshHoldingTimeout
, DEC
, u16
);
226 IEEE80211_IF_WFILE(dot11MeshTTL
, u
.sta
.mshcfg
.dot11MeshTTL
, DEC
, u8
);
227 IEEE80211_IF_WFILE(auto_open_plinks
, u
.sta
.mshcfg
.auto_open_plinks
, DEC
, u8
);
228 IEEE80211_IF_WFILE(dot11MeshMaxPeerLinks
,
229 u
.sta
.mshcfg
.dot11MeshMaxPeerLinks
, DEC
, u16
);
230 IEEE80211_IF_WFILE(dot11MeshHWMPactivePathTimeout
,
231 u
.sta
.mshcfg
.dot11MeshHWMPactivePathTimeout
, DEC
, u32
);
232 IEEE80211_IF_WFILE(dot11MeshHWMPpreqMinInterval
,
233 u
.sta
.mshcfg
.dot11MeshHWMPpreqMinInterval
, DEC
, u16
);
234 IEEE80211_IF_WFILE(dot11MeshHWMPnetDiameterTraversalTime
,
235 u
.sta
.mshcfg
.dot11MeshHWMPnetDiameterTraversalTime
, DEC
, u16
);
236 IEEE80211_IF_WFILE(dot11MeshHWMPmaxPREQretries
,
237 u
.sta
.mshcfg
.dot11MeshHWMPmaxPREQretries
, DEC
, u8
);
238 IEEE80211_IF_WFILE(path_refresh_time
,
239 u
.sta
.mshcfg
.path_refresh_time
, DEC
, u32
);
240 IEEE80211_IF_WFILE(min_discovery_timeout
,
241 u
.sta
.mshcfg
.min_discovery_timeout
, DEC
, u16
);
245 #define DEBUGFS_ADD(name, type)\
246 sdata->debugfs.type.name = debugfs_create_file(#name, 0444,\
247 sdata->debugfsdir, sdata, &name##_ops);
249 static void add_sta_files(struct ieee80211_sub_if_data
*sdata
)
251 DEBUGFS_ADD(channel_use
, sta
);
252 DEBUGFS_ADD(drop_unencrypted
, sta
);
253 DEBUGFS_ADD(state
, sta
);
254 DEBUGFS_ADD(bssid
, sta
);
255 DEBUGFS_ADD(prev_bssid
, sta
);
256 DEBUGFS_ADD(ssid_len
, sta
);
257 DEBUGFS_ADD(aid
, sta
);
258 DEBUGFS_ADD(ap_capab
, sta
);
259 DEBUGFS_ADD(capab
, sta
);
260 DEBUGFS_ADD(extra_ie_len
, sta
);
261 DEBUGFS_ADD(auth_tries
, sta
);
262 DEBUGFS_ADD(assoc_tries
, sta
);
263 DEBUGFS_ADD(auth_algs
, sta
);
264 DEBUGFS_ADD(auth_alg
, sta
);
265 DEBUGFS_ADD(auth_transaction
, sta
);
266 DEBUGFS_ADD(flags
, sta
);
267 DEBUGFS_ADD(num_beacons_sta
, sta
);
270 static void add_ap_files(struct ieee80211_sub_if_data
*sdata
)
272 DEBUGFS_ADD(channel_use
, ap
);
273 DEBUGFS_ADD(drop_unencrypted
, ap
);
274 DEBUGFS_ADD(num_sta_ps
, ap
);
275 DEBUGFS_ADD(dtim_count
, ap
);
276 DEBUGFS_ADD(num_beacons
, ap
);
277 DEBUGFS_ADD(force_unicast_rateidx
, ap
);
278 DEBUGFS_ADD(max_ratectrl_rateidx
, ap
);
279 DEBUGFS_ADD(num_buffered_multicast
, ap
);
282 static void add_wds_files(struct ieee80211_sub_if_data
*sdata
)
284 DEBUGFS_ADD(channel_use
, wds
);
285 DEBUGFS_ADD(drop_unencrypted
, wds
);
286 DEBUGFS_ADD(peer
, wds
);
289 static void add_vlan_files(struct ieee80211_sub_if_data
*sdata
)
291 DEBUGFS_ADD(channel_use
, vlan
);
292 DEBUGFS_ADD(drop_unencrypted
, vlan
);
295 static void add_monitor_files(struct ieee80211_sub_if_data
*sdata
)
299 #ifdef CONFIG_MAC80211_MESH
300 #define MESHSTATS_ADD(name)\
301 sdata->mesh_stats.name = debugfs_create_file(#name, 0444,\
302 sdata->mesh_stats_dir, sdata, &name##_ops);
304 static void add_mesh_stats(struct ieee80211_sub_if_data
*sdata
)
306 sdata
->mesh_stats_dir
= debugfs_create_dir("mesh_stats",
308 MESHSTATS_ADD(fwded_frames
);
309 MESHSTATS_ADD(dropped_frames_ttl
);
310 MESHSTATS_ADD(dropped_frames_no_route
);
311 MESHSTATS_ADD(estab_plinks
);
314 #define MESHPARAMS_ADD(name)\
315 sdata->mesh_config.name = debugfs_create_file(#name, 0644,\
316 sdata->mesh_config_dir, sdata, &name##_ops);
318 static void add_mesh_config(struct ieee80211_sub_if_data
*sdata
)
320 sdata
->mesh_config_dir
= debugfs_create_dir("mesh_config",
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
);
338 static void add_files(struct ieee80211_sub_if_data
*sdata
)
340 if (!sdata
->debugfsdir
)
343 switch (sdata
->vif
.type
) {
344 case IEEE80211_IF_TYPE_MESH_POINT
:
345 #ifdef CONFIG_MAC80211_MESH
346 add_mesh_stats(sdata
);
347 add_mesh_config(sdata
);
350 case IEEE80211_IF_TYPE_STA
:
351 case IEEE80211_IF_TYPE_IBSS
:
352 add_sta_files(sdata
);
354 case IEEE80211_IF_TYPE_AP
:
357 case IEEE80211_IF_TYPE_WDS
:
358 add_wds_files(sdata
);
360 case IEEE80211_IF_TYPE_MNTR
:
361 add_monitor_files(sdata
);
363 case IEEE80211_IF_TYPE_VLAN
:
364 add_vlan_files(sdata
);
371 #define DEBUGFS_DEL(name, type) \
373 debugfs_remove(sdata->debugfs.type.name); \
374 sdata->debugfs.type.name = NULL; \
377 static void del_sta_files(struct ieee80211_sub_if_data
*sdata
)
379 DEBUGFS_DEL(channel_use
, sta
);
380 DEBUGFS_DEL(drop_unencrypted
, sta
);
381 DEBUGFS_DEL(state
, sta
);
382 DEBUGFS_DEL(bssid
, sta
);
383 DEBUGFS_DEL(prev_bssid
, sta
);
384 DEBUGFS_DEL(ssid_len
, sta
);
385 DEBUGFS_DEL(aid
, sta
);
386 DEBUGFS_DEL(ap_capab
, sta
);
387 DEBUGFS_DEL(capab
, sta
);
388 DEBUGFS_DEL(extra_ie_len
, sta
);
389 DEBUGFS_DEL(auth_tries
, sta
);
390 DEBUGFS_DEL(assoc_tries
, sta
);
391 DEBUGFS_DEL(auth_algs
, sta
);
392 DEBUGFS_DEL(auth_alg
, sta
);
393 DEBUGFS_DEL(auth_transaction
, sta
);
394 DEBUGFS_DEL(flags
, sta
);
395 DEBUGFS_DEL(num_beacons_sta
, sta
);
398 static void del_ap_files(struct ieee80211_sub_if_data
*sdata
)
400 DEBUGFS_DEL(channel_use
, ap
);
401 DEBUGFS_DEL(drop_unencrypted
, ap
);
402 DEBUGFS_DEL(num_sta_ps
, ap
);
403 DEBUGFS_DEL(dtim_count
, ap
);
404 DEBUGFS_DEL(num_beacons
, ap
);
405 DEBUGFS_DEL(force_unicast_rateidx
, ap
);
406 DEBUGFS_DEL(max_ratectrl_rateidx
, ap
);
407 DEBUGFS_DEL(num_buffered_multicast
, ap
);
410 static void del_wds_files(struct ieee80211_sub_if_data
*sdata
)
412 DEBUGFS_DEL(channel_use
, wds
);
413 DEBUGFS_DEL(drop_unencrypted
, wds
);
414 DEBUGFS_DEL(peer
, wds
);
417 static void del_vlan_files(struct ieee80211_sub_if_data
*sdata
)
419 DEBUGFS_DEL(channel_use
, vlan
);
420 DEBUGFS_DEL(drop_unencrypted
, vlan
);
423 static void del_monitor_files(struct ieee80211_sub_if_data
*sdata
)
427 #ifdef CONFIG_MAC80211_MESH
428 #define MESHSTATS_DEL(name) \
430 debugfs_remove(sdata->mesh_stats.name); \
431 sdata->mesh_stats.name = NULL; \
434 static void del_mesh_stats(struct ieee80211_sub_if_data
*sdata
)
436 MESHSTATS_DEL(fwded_frames
);
437 MESHSTATS_DEL(dropped_frames_ttl
);
438 MESHSTATS_DEL(dropped_frames_no_route
);
439 MESHSTATS_DEL(estab_plinks
);
440 debugfs_remove(sdata
->mesh_stats_dir
);
441 sdata
->mesh_stats_dir
= NULL
;
444 #define MESHPARAMS_DEL(name) \
446 debugfs_remove(sdata->mesh_config.name); \
447 sdata->mesh_config.name = NULL; \
450 static void del_mesh_config(struct ieee80211_sub_if_data
*sdata
)
452 MESHPARAMS_DEL(dot11MeshMaxRetries
);
453 MESHPARAMS_DEL(dot11MeshRetryTimeout
);
454 MESHPARAMS_DEL(dot11MeshConfirmTimeout
);
455 MESHPARAMS_DEL(dot11MeshHoldingTimeout
);
456 MESHPARAMS_DEL(dot11MeshTTL
);
457 MESHPARAMS_DEL(auto_open_plinks
);
458 MESHPARAMS_DEL(dot11MeshMaxPeerLinks
);
459 MESHPARAMS_DEL(dot11MeshHWMPactivePathTimeout
);
460 MESHPARAMS_DEL(dot11MeshHWMPpreqMinInterval
);
461 MESHPARAMS_DEL(dot11MeshHWMPnetDiameterTraversalTime
);
462 MESHPARAMS_DEL(dot11MeshHWMPmaxPREQretries
);
463 MESHPARAMS_DEL(path_refresh_time
);
464 MESHPARAMS_DEL(min_discovery_timeout
);
465 debugfs_remove(sdata
->mesh_config_dir
);
466 sdata
->mesh_config_dir
= NULL
;
470 static void del_files(struct ieee80211_sub_if_data
*sdata
, int type
)
472 if (!sdata
->debugfsdir
)
476 case IEEE80211_IF_TYPE_MESH_POINT
:
477 #ifdef CONFIG_MAC80211_MESH
478 del_mesh_stats(sdata
);
479 del_mesh_config(sdata
);
482 case IEEE80211_IF_TYPE_STA
:
483 case IEEE80211_IF_TYPE_IBSS
:
484 del_sta_files(sdata
);
486 case IEEE80211_IF_TYPE_AP
:
489 case IEEE80211_IF_TYPE_WDS
:
490 del_wds_files(sdata
);
492 case IEEE80211_IF_TYPE_MNTR
:
493 del_monitor_files(sdata
);
495 case IEEE80211_IF_TYPE_VLAN
:
496 del_vlan_files(sdata
);
503 static int notif_registered
;
505 void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data
*sdata
)
507 char buf
[10+IFNAMSIZ
];
509 if (!notif_registered
)
512 sprintf(buf
, "netdev:%s", sdata
->dev
->name
);
513 sdata
->debugfsdir
= debugfs_create_dir(buf
,
514 sdata
->local
->hw
.wiphy
->debugfsdir
);
517 void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data
*sdata
)
519 del_files(sdata
, sdata
->vif
.type
);
520 debugfs_remove(sdata
->debugfsdir
);
521 sdata
->debugfsdir
= NULL
;
524 void ieee80211_debugfs_change_if_type(struct ieee80211_sub_if_data
*sdata
,
527 del_files(sdata
, oldtype
);
531 static int netdev_notify(struct notifier_block
* nb
,
535 struct net_device
*dev
= ndev
;
537 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
538 char buf
[10+IFNAMSIZ
];
540 if (state
!= NETDEV_CHANGENAME
)
543 if (!dev
->ieee80211_ptr
|| !dev
->ieee80211_ptr
->wiphy
)
546 if (dev
->ieee80211_ptr
->wiphy
->privid
!= mac80211_wiphy_privid
)
549 sprintf(buf
, "netdev:%s", dev
->name
);
550 dir
= sdata
->debugfsdir
;
551 if (!debugfs_rename(dir
->d_parent
, dir
, dir
->d_parent
, buf
))
552 printk(KERN_ERR
"mac80211: debugfs: failed to rename debugfs "
558 static struct notifier_block mac80211_debugfs_netdev_notifier
= {
559 .notifier_call
= netdev_notify
,
562 void ieee80211_debugfs_netdev_init(void)
566 err
= register_netdevice_notifier(&mac80211_debugfs_netdev_notifier
);
569 "mac80211: failed to install netdev notifier,"
570 " disabling per-netdev debugfs!\n");
572 notif_registered
= 1;
575 void ieee80211_debugfs_netdev_exit(void)
577 unregister_netdevice_notifier(&mac80211_debugfs_netdev_notifier
);
578 notif_registered
= 0;