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 ret
= simple_read_from_buffer(userbuf
, count
, ppos
, buf
, ret
);
38 read_unlock(&dev_base_lock
);
42 #ifdef CONFIG_MAC80211_MESH
43 static ssize_t
ieee80211_if_write(
44 struct ieee80211_sub_if_data
*sdata
,
45 char const __user
*userbuf
,
46 size_t count
, loff_t
*ppos
,
47 int (*format
)(struct ieee80211_sub_if_data
*, char *))
52 memset(buf
, 0x00, sizeof(buf
));
53 buf_size
= min(count
, (sizeof(buf
)-1));
54 read_lock(&dev_base_lock
);
55 if (copy_from_user(buf
, userbuf
, buf_size
))
57 if (sdata
->dev
->reg_state
== NETREG_REGISTERED
)
58 (*format
)(sdata
, buf
);
60 read_unlock(&dev_base_lock
);
65 #define IEEE80211_IF_FMT(name, field, format_string) \
66 static ssize_t ieee80211_if_fmt_##name( \
67 const struct ieee80211_sub_if_data *sdata, char *buf, \
70 return scnprintf(buf, buflen, format_string, sdata->field); \
72 #define IEEE80211_IF_WFMT(name, field, type) \
73 static int ieee80211_if_wfmt_##name( \
74 struct ieee80211_sub_if_data *sdata, char *buf) \
79 tmp = simple_strtoul(buf, &endp, 0); \
80 if ((endp == buf) || ((type)tmp != tmp)) \
85 #define IEEE80211_IF_FMT_DEC(name, field) \
86 IEEE80211_IF_FMT(name, field, "%d\n")
87 #define IEEE80211_IF_FMT_HEX(name, field) \
88 IEEE80211_IF_FMT(name, field, "%#x\n")
89 #define IEEE80211_IF_FMT_SIZE(name, field) \
90 IEEE80211_IF_FMT(name, field, "%zd\n")
92 #define IEEE80211_IF_FMT_ATOMIC(name, field) \
93 static ssize_t ieee80211_if_fmt_##name( \
94 const struct ieee80211_sub_if_data *sdata, \
95 char *buf, int buflen) \
97 return scnprintf(buf, buflen, "%d\n", atomic_read(&sdata->field));\
100 #define IEEE80211_IF_FMT_MAC(name, field) \
101 static ssize_t ieee80211_if_fmt_##name( \
102 const struct ieee80211_sub_if_data *sdata, char *buf, \
105 DECLARE_MAC_BUF(mac); \
106 return scnprintf(buf, buflen, "%s\n", print_mac(mac, sdata->field));\
109 #define __IEEE80211_IF_FILE(name) \
110 static ssize_t ieee80211_if_read_##name(struct file *file, \
111 char __user *userbuf, \
112 size_t count, loff_t *ppos) \
114 return ieee80211_if_read(file->private_data, \
115 userbuf, count, ppos, \
116 ieee80211_if_fmt_##name); \
118 static const struct file_operations name##_ops = { \
119 .read = ieee80211_if_read_##name, \
120 .open = mac80211_open_file_generic, \
123 #define IEEE80211_IF_FILE(name, field, format) \
124 IEEE80211_IF_FMT_##format(name, field) \
125 __IEEE80211_IF_FILE(name)
127 #define __IEEE80211_IF_WFILE(name) \
128 static ssize_t ieee80211_if_read_##name(struct file *file, \
129 char __user *userbuf, \
130 size_t count, loff_t *ppos) \
132 return ieee80211_if_read(file->private_data, \
133 userbuf, count, ppos, \
134 ieee80211_if_fmt_##name); \
136 static ssize_t ieee80211_if_write_##name(struct file *file, \
137 const char __user *userbuf, \
138 size_t count, loff_t *ppos) \
140 return ieee80211_if_write(file->private_data, \
141 userbuf, count, ppos, \
142 ieee80211_if_wfmt_##name); \
144 static const struct file_operations name##_ops = { \
145 .read = ieee80211_if_read_##name, \
146 .write = ieee80211_if_write_##name, \
147 .open = mac80211_open_file_generic, \
150 #define IEEE80211_IF_WFILE(name, field, format, type) \
151 IEEE80211_IF_FMT_##format(name, field) \
152 IEEE80211_IF_WFMT(name, field, type) \
153 __IEEE80211_IF_WFILE(name)
155 /* common attributes */
156 IEEE80211_IF_FILE(channel_use
, channel_use
, DEC
);
157 IEEE80211_IF_FILE(drop_unencrypted
, drop_unencrypted
, DEC
);
159 /* STA/IBSS attributes */
160 IEEE80211_IF_FILE(state
, u
.sta
.state
, DEC
);
161 IEEE80211_IF_FILE(bssid
, u
.sta
.bssid
, MAC
);
162 IEEE80211_IF_FILE(prev_bssid
, u
.sta
.prev_bssid
, MAC
);
163 IEEE80211_IF_FILE(ssid_len
, u
.sta
.ssid_len
, SIZE
);
164 IEEE80211_IF_FILE(aid
, u
.sta
.aid
, DEC
);
165 IEEE80211_IF_FILE(ap_capab
, u
.sta
.ap_capab
, HEX
);
166 IEEE80211_IF_FILE(capab
, u
.sta
.capab
, HEX
);
167 IEEE80211_IF_FILE(extra_ie_len
, u
.sta
.extra_ie_len
, SIZE
);
168 IEEE80211_IF_FILE(auth_tries
, u
.sta
.auth_tries
, DEC
);
169 IEEE80211_IF_FILE(assoc_tries
, u
.sta
.assoc_tries
, DEC
);
170 IEEE80211_IF_FILE(auth_algs
, u
.sta
.auth_algs
, HEX
);
171 IEEE80211_IF_FILE(auth_alg
, u
.sta
.auth_alg
, DEC
);
172 IEEE80211_IF_FILE(auth_transaction
, u
.sta
.auth_transaction
, DEC
);
173 IEEE80211_IF_FILE(num_beacons_sta
, u
.sta
.num_beacons
, DEC
);
175 static ssize_t
ieee80211_if_fmt_flags(
176 const struct ieee80211_sub_if_data
*sdata
, char *buf
, int buflen
)
178 return scnprintf(buf
, buflen
, "%s%s%s%s%s%s%s\n",
179 sdata
->u
.sta
.flags
& IEEE80211_STA_SSID_SET
? "SSID\n" : "",
180 sdata
->u
.sta
.flags
& IEEE80211_STA_BSSID_SET
? "BSSID\n" : "",
181 sdata
->u
.sta
.flags
& IEEE80211_STA_PREV_BSSID_SET
? "prev BSSID\n" : "",
182 sdata
->u
.sta
.flags
& IEEE80211_STA_AUTHENTICATED
? "AUTH\n" : "",
183 sdata
->u
.sta
.flags
& IEEE80211_STA_ASSOCIATED
? "ASSOC\n" : "",
184 sdata
->u
.sta
.flags
& IEEE80211_STA_PROBEREQ_POLL
? "PROBEREQ POLL\n" : "",
185 sdata
->bss_conf
.use_cts_prot
? "CTS prot\n" : "");
187 __IEEE80211_IF_FILE(flags
);
190 IEEE80211_IF_FILE(num_sta_ps
, u
.ap
.num_sta_ps
, ATOMIC
);
191 IEEE80211_IF_FILE(dtim_count
, u
.ap
.dtim_count
, DEC
);
192 IEEE80211_IF_FILE(num_beacons
, u
.ap
.num_beacons
, DEC
);
193 IEEE80211_IF_FILE(force_unicast_rateidx
, u
.ap
.force_unicast_rateidx
, DEC
);
194 IEEE80211_IF_FILE(max_ratectrl_rateidx
, u
.ap
.max_ratectrl_rateidx
, DEC
);
196 static ssize_t
ieee80211_if_fmt_num_buffered_multicast(
197 const struct ieee80211_sub_if_data
*sdata
, char *buf
, int buflen
)
199 return scnprintf(buf
, buflen
, "%u\n",
200 skb_queue_len(&sdata
->u
.ap
.ps_bc_buf
));
202 __IEEE80211_IF_FILE(num_buffered_multicast
);
205 IEEE80211_IF_FILE(peer
, u
.wds
.remote_addr
, MAC
);
207 #ifdef CONFIG_MAC80211_MESH
208 /* Mesh stats attributes */
209 IEEE80211_IF_FILE(fwded_frames
, u
.sta
.mshstats
.fwded_frames
, DEC
);
210 IEEE80211_IF_FILE(dropped_frames_ttl
, u
.sta
.mshstats
.dropped_frames_ttl
, DEC
);
211 IEEE80211_IF_FILE(dropped_frames_no_route
,
212 u
.sta
.mshstats
.dropped_frames_no_route
, DEC
);
213 IEEE80211_IF_FILE(estab_plinks
, u
.sta
.mshstats
.estab_plinks
, ATOMIC
);
215 /* Mesh parameters */
216 IEEE80211_IF_WFILE(dot11MeshMaxRetries
,
217 u
.sta
.mshcfg
.dot11MeshMaxRetries
, DEC
, u8
);
218 IEEE80211_IF_WFILE(dot11MeshRetryTimeout
,
219 u
.sta
.mshcfg
.dot11MeshRetryTimeout
, DEC
, u16
);
220 IEEE80211_IF_WFILE(dot11MeshConfirmTimeout
,
221 u
.sta
.mshcfg
.dot11MeshConfirmTimeout
, DEC
, u16
);
222 IEEE80211_IF_WFILE(dot11MeshHoldingTimeout
,
223 u
.sta
.mshcfg
.dot11MeshHoldingTimeout
, DEC
, u16
);
224 IEEE80211_IF_WFILE(dot11MeshTTL
, u
.sta
.mshcfg
.dot11MeshTTL
, DEC
, u8
);
225 IEEE80211_IF_WFILE(auto_open_plinks
, u
.sta
.mshcfg
.auto_open_plinks
, DEC
, bool);
226 IEEE80211_IF_WFILE(dot11MeshMaxPeerLinks
,
227 u
.sta
.mshcfg
.dot11MeshMaxPeerLinks
, DEC
, u16
);
228 IEEE80211_IF_WFILE(dot11MeshHWMPactivePathTimeout
,
229 u
.sta
.mshcfg
.dot11MeshHWMPactivePathTimeout
, DEC
, u32
);
230 IEEE80211_IF_WFILE(dot11MeshHWMPpreqMinInterval
,
231 u
.sta
.mshcfg
.dot11MeshHWMPpreqMinInterval
, DEC
, u16
);
232 IEEE80211_IF_WFILE(dot11MeshHWMPnetDiameterTraversalTime
,
233 u
.sta
.mshcfg
.dot11MeshHWMPnetDiameterTraversalTime
, DEC
, u16
);
234 IEEE80211_IF_WFILE(dot11MeshHWMPmaxPREQretries
,
235 u
.sta
.mshcfg
.dot11MeshHWMPmaxPREQretries
, DEC
, u8
);
236 IEEE80211_IF_WFILE(path_refresh_time
,
237 u
.sta
.mshcfg
.path_refresh_time
, DEC
, u32
);
238 IEEE80211_IF_WFILE(min_discovery_timeout
,
239 u
.sta
.mshcfg
.min_discovery_timeout
, DEC
, u16
);
243 #define DEBUGFS_ADD(name, type)\
244 sdata->debugfs.type.name = debugfs_create_file(#name, 0444,\
245 sdata->debugfsdir, sdata, &name##_ops);
247 static void add_sta_files(struct ieee80211_sub_if_data
*sdata
)
249 DEBUGFS_ADD(channel_use
, sta
);
250 DEBUGFS_ADD(drop_unencrypted
, sta
);
251 DEBUGFS_ADD(state
, sta
);
252 DEBUGFS_ADD(bssid
, sta
);
253 DEBUGFS_ADD(prev_bssid
, sta
);
254 DEBUGFS_ADD(ssid_len
, sta
);
255 DEBUGFS_ADD(aid
, sta
);
256 DEBUGFS_ADD(ap_capab
, sta
);
257 DEBUGFS_ADD(capab
, sta
);
258 DEBUGFS_ADD(extra_ie_len
, sta
);
259 DEBUGFS_ADD(auth_tries
, sta
);
260 DEBUGFS_ADD(assoc_tries
, sta
);
261 DEBUGFS_ADD(auth_algs
, sta
);
262 DEBUGFS_ADD(auth_alg
, sta
);
263 DEBUGFS_ADD(auth_transaction
, sta
);
264 DEBUGFS_ADD(flags
, sta
);
265 DEBUGFS_ADD(num_beacons_sta
, sta
);
268 static void add_ap_files(struct ieee80211_sub_if_data
*sdata
)
270 DEBUGFS_ADD(channel_use
, ap
);
271 DEBUGFS_ADD(drop_unencrypted
, ap
);
272 DEBUGFS_ADD(num_sta_ps
, ap
);
273 DEBUGFS_ADD(dtim_count
, ap
);
274 DEBUGFS_ADD(num_beacons
, ap
);
275 DEBUGFS_ADD(force_unicast_rateidx
, ap
);
276 DEBUGFS_ADD(max_ratectrl_rateidx
, ap
);
277 DEBUGFS_ADD(num_buffered_multicast
, ap
);
280 static void add_wds_files(struct ieee80211_sub_if_data
*sdata
)
282 DEBUGFS_ADD(channel_use
, wds
);
283 DEBUGFS_ADD(drop_unencrypted
, wds
);
284 DEBUGFS_ADD(peer
, wds
);
287 static void add_vlan_files(struct ieee80211_sub_if_data
*sdata
)
289 DEBUGFS_ADD(channel_use
, vlan
);
290 DEBUGFS_ADD(drop_unencrypted
, vlan
);
293 static void add_monitor_files(struct ieee80211_sub_if_data
*sdata
)
297 #ifdef CONFIG_MAC80211_MESH
298 #define MESHSTATS_ADD(name)\
299 sdata->mesh_stats.name = debugfs_create_file(#name, 0444,\
300 sdata->mesh_stats_dir, sdata, &name##_ops);
302 static void add_mesh_stats(struct ieee80211_sub_if_data
*sdata
)
304 sdata
->mesh_stats_dir
= debugfs_create_dir("mesh_stats",
306 MESHSTATS_ADD(fwded_frames
);
307 MESHSTATS_ADD(dropped_frames_ttl
);
308 MESHSTATS_ADD(dropped_frames_no_route
);
309 MESHSTATS_ADD(estab_plinks
);
312 #define MESHPARAMS_ADD(name)\
313 sdata->mesh_config.name = debugfs_create_file(#name, 0644,\
314 sdata->mesh_config_dir, sdata, &name##_ops);
316 static void add_mesh_config(struct ieee80211_sub_if_data
*sdata
)
318 sdata
->mesh_config_dir
= debugfs_create_dir("mesh_config",
320 MESHPARAMS_ADD(dot11MeshMaxRetries
);
321 MESHPARAMS_ADD(dot11MeshRetryTimeout
);
322 MESHPARAMS_ADD(dot11MeshConfirmTimeout
);
323 MESHPARAMS_ADD(dot11MeshHoldingTimeout
);
324 MESHPARAMS_ADD(dot11MeshTTL
);
325 MESHPARAMS_ADD(auto_open_plinks
);
326 MESHPARAMS_ADD(dot11MeshMaxPeerLinks
);
327 MESHPARAMS_ADD(dot11MeshHWMPactivePathTimeout
);
328 MESHPARAMS_ADD(dot11MeshHWMPpreqMinInterval
);
329 MESHPARAMS_ADD(dot11MeshHWMPnetDiameterTraversalTime
);
330 MESHPARAMS_ADD(dot11MeshHWMPmaxPREQretries
);
331 MESHPARAMS_ADD(path_refresh_time
);
332 MESHPARAMS_ADD(min_discovery_timeout
);
336 static void add_files(struct ieee80211_sub_if_data
*sdata
)
338 if (!sdata
->debugfsdir
)
341 switch (sdata
->vif
.type
) {
342 case IEEE80211_IF_TYPE_MESH_POINT
:
343 #ifdef CONFIG_MAC80211_MESH
344 add_mesh_stats(sdata
);
345 add_mesh_config(sdata
);
348 case IEEE80211_IF_TYPE_STA
:
349 case IEEE80211_IF_TYPE_IBSS
:
350 add_sta_files(sdata
);
352 case IEEE80211_IF_TYPE_AP
:
355 case IEEE80211_IF_TYPE_WDS
:
356 add_wds_files(sdata
);
358 case IEEE80211_IF_TYPE_MNTR
:
359 add_monitor_files(sdata
);
361 case IEEE80211_IF_TYPE_VLAN
:
362 add_vlan_files(sdata
);
369 #define DEBUGFS_DEL(name, type) \
371 debugfs_remove(sdata->debugfs.type.name); \
372 sdata->debugfs.type.name = NULL; \
375 static void del_sta_files(struct ieee80211_sub_if_data
*sdata
)
377 DEBUGFS_DEL(channel_use
, sta
);
378 DEBUGFS_DEL(drop_unencrypted
, sta
);
379 DEBUGFS_DEL(state
, sta
);
380 DEBUGFS_DEL(bssid
, sta
);
381 DEBUGFS_DEL(prev_bssid
, sta
);
382 DEBUGFS_DEL(ssid_len
, sta
);
383 DEBUGFS_DEL(aid
, sta
);
384 DEBUGFS_DEL(ap_capab
, sta
);
385 DEBUGFS_DEL(capab
, sta
);
386 DEBUGFS_DEL(extra_ie_len
, sta
);
387 DEBUGFS_DEL(auth_tries
, sta
);
388 DEBUGFS_DEL(assoc_tries
, sta
);
389 DEBUGFS_DEL(auth_algs
, sta
);
390 DEBUGFS_DEL(auth_alg
, sta
);
391 DEBUGFS_DEL(auth_transaction
, sta
);
392 DEBUGFS_DEL(flags
, sta
);
393 DEBUGFS_DEL(num_beacons_sta
, sta
);
396 static void del_ap_files(struct ieee80211_sub_if_data
*sdata
)
398 DEBUGFS_DEL(channel_use
, ap
);
399 DEBUGFS_DEL(drop_unencrypted
, ap
);
400 DEBUGFS_DEL(num_sta_ps
, ap
);
401 DEBUGFS_DEL(dtim_count
, ap
);
402 DEBUGFS_DEL(num_beacons
, ap
);
403 DEBUGFS_DEL(force_unicast_rateidx
, ap
);
404 DEBUGFS_DEL(max_ratectrl_rateidx
, ap
);
405 DEBUGFS_DEL(num_buffered_multicast
, ap
);
408 static void del_wds_files(struct ieee80211_sub_if_data
*sdata
)
410 DEBUGFS_DEL(channel_use
, wds
);
411 DEBUGFS_DEL(drop_unencrypted
, wds
);
412 DEBUGFS_DEL(peer
, wds
);
415 static void del_vlan_files(struct ieee80211_sub_if_data
*sdata
)
417 DEBUGFS_DEL(channel_use
, vlan
);
418 DEBUGFS_DEL(drop_unencrypted
, vlan
);
421 static void del_monitor_files(struct ieee80211_sub_if_data
*sdata
)
425 #ifdef CONFIG_MAC80211_MESH
426 #define MESHSTATS_DEL(name) \
428 debugfs_remove(sdata->mesh_stats.name); \
429 sdata->mesh_stats.name = NULL; \
432 static void del_mesh_stats(struct ieee80211_sub_if_data
*sdata
)
434 MESHSTATS_DEL(fwded_frames
);
435 MESHSTATS_DEL(dropped_frames_ttl
);
436 MESHSTATS_DEL(dropped_frames_no_route
);
437 MESHSTATS_DEL(estab_plinks
);
438 debugfs_remove(sdata
->mesh_stats_dir
);
439 sdata
->mesh_stats_dir
= NULL
;
442 #define MESHPARAMS_DEL(name) \
444 debugfs_remove(sdata->mesh_config.name); \
445 sdata->mesh_config.name = NULL; \
448 static void del_mesh_config(struct ieee80211_sub_if_data
*sdata
)
450 MESHPARAMS_DEL(dot11MeshMaxRetries
);
451 MESHPARAMS_DEL(dot11MeshRetryTimeout
);
452 MESHPARAMS_DEL(dot11MeshConfirmTimeout
);
453 MESHPARAMS_DEL(dot11MeshHoldingTimeout
);
454 MESHPARAMS_DEL(dot11MeshTTL
);
455 MESHPARAMS_DEL(auto_open_plinks
);
456 MESHPARAMS_DEL(dot11MeshMaxPeerLinks
);
457 MESHPARAMS_DEL(dot11MeshHWMPactivePathTimeout
);
458 MESHPARAMS_DEL(dot11MeshHWMPpreqMinInterval
);
459 MESHPARAMS_DEL(dot11MeshHWMPnetDiameterTraversalTime
);
460 MESHPARAMS_DEL(dot11MeshHWMPmaxPREQretries
);
461 MESHPARAMS_DEL(path_refresh_time
);
462 MESHPARAMS_DEL(min_discovery_timeout
);
463 debugfs_remove(sdata
->mesh_config_dir
);
464 sdata
->mesh_config_dir
= NULL
;
468 static void del_files(struct ieee80211_sub_if_data
*sdata
, int type
)
470 if (!sdata
->debugfsdir
)
474 case IEEE80211_IF_TYPE_MESH_POINT
:
475 #ifdef CONFIG_MAC80211_MESH
476 del_mesh_stats(sdata
);
477 del_mesh_config(sdata
);
480 case IEEE80211_IF_TYPE_STA
:
481 case IEEE80211_IF_TYPE_IBSS
:
482 del_sta_files(sdata
);
484 case IEEE80211_IF_TYPE_AP
:
487 case IEEE80211_IF_TYPE_WDS
:
488 del_wds_files(sdata
);
490 case IEEE80211_IF_TYPE_MNTR
:
491 del_monitor_files(sdata
);
493 case IEEE80211_IF_TYPE_VLAN
:
494 del_vlan_files(sdata
);
501 static int notif_registered
;
503 void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data
*sdata
)
505 char buf
[10+IFNAMSIZ
];
507 if (!notif_registered
)
510 sprintf(buf
, "netdev:%s", sdata
->dev
->name
);
511 sdata
->debugfsdir
= debugfs_create_dir(buf
,
512 sdata
->local
->hw
.wiphy
->debugfsdir
);
515 void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data
*sdata
)
517 del_files(sdata
, sdata
->vif
.type
);
518 debugfs_remove(sdata
->debugfsdir
);
519 sdata
->debugfsdir
= NULL
;
522 void ieee80211_debugfs_change_if_type(struct ieee80211_sub_if_data
*sdata
,
525 del_files(sdata
, oldtype
);
529 static int netdev_notify(struct notifier_block
* nb
,
533 struct net_device
*dev
= ndev
;
535 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
536 char buf
[10+IFNAMSIZ
];
538 if (state
!= NETDEV_CHANGENAME
)
541 if (!dev
->ieee80211_ptr
|| !dev
->ieee80211_ptr
->wiphy
)
544 if (dev
->ieee80211_ptr
->wiphy
->privid
!= mac80211_wiphy_privid
)
547 sprintf(buf
, "netdev:%s", dev
->name
);
548 dir
= sdata
->debugfsdir
;
549 if (!debugfs_rename(dir
->d_parent
, dir
, dir
->d_parent
, buf
))
550 printk(KERN_ERR
"mac80211: debugfs: failed to rename debugfs "
556 static struct notifier_block mac80211_debugfs_netdev_notifier
= {
557 .notifier_call
= netdev_notify
,
560 void ieee80211_debugfs_netdev_init(void)
564 err
= register_netdevice_notifier(&mac80211_debugfs_netdev_notifier
);
567 "mac80211: failed to install netdev notifier,"
568 " disabling per-netdev debugfs!\n");
570 notif_registered
= 1;
573 void ieee80211_debugfs_netdev_exit(void)
575 unregister_netdevice_notifier(&mac80211_debugfs_netdev_notifier
);
576 notif_registered
= 0;