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This client driver allows you to use a GPIO pin as a source for PPS
[linux-2.6/next.git] / net / mac80211 / debugfs_netdev.c
blob6e8eab7919e2e2a95db3ee761419b066d5c7655a
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/slab.h>
17 #include <linux/notifier.h>
18 #include <net/mac80211.h>
19 #include <net/cfg80211.h>
20 #include "ieee80211_i.h"
21 #include "rate.h"
22 #include "debugfs.h"
23 #include "debugfs_netdev.h"
24
25 static ssize_t ieee80211_if_read(
26 struct ieee80211_sub_if_data *sdata,
27 char __user *userbuf,
28 size_t count, loff_t *ppos,
29 ssize_t (*format)(const struct ieee80211_sub_if_data *, char *, int))
30 {
31 char buf[70];
32 ssize_t ret = -EINVAL;
33
34 read_lock(&dev_base_lock);
35 if (sdata->dev->reg_state == NETREG_REGISTERED)
36 ret = (*format)(sdata, buf, sizeof(buf));
37 read_unlock(&dev_base_lock);
38
39 if (ret >= 0)
40 ret = simple_read_from_buffer(userbuf, count, ppos, buf, ret);
41
42 return ret;
43 }
44
45 static ssize_t ieee80211_if_write(
46 struct ieee80211_sub_if_data *sdata,
47 const char __user *userbuf,
48 size_t count, loff_t *ppos,
49 ssize_t (*write)(struct ieee80211_sub_if_data *, const char *, int))
50 {
51 u8 *buf;
52 ssize_t ret;
53
54 buf = kmalloc(count, GFP_KERNEL);
55 if (!buf)
56 return -ENOMEM;
57
58 ret = -EFAULT;
59 if (copy_from_user(buf, userbuf, count))
60 goto freebuf;
61
62 ret = -ENODEV;
63 rtnl_lock();
64 if (sdata->dev->reg_state == NETREG_REGISTERED)
65 ret = (*write)(sdata, buf, count);
66 rtnl_unlock();
67
68 freebuf:
69 kfree(buf);
70 return ret;
71 }
72
73 #define IEEE80211_IF_FMT(name, field, format_string) \
74 static ssize_t ieee80211_if_fmt_##name( \
75 const struct ieee80211_sub_if_data *sdata, char *buf, \
76 int buflen) \
77 { \
78 return scnprintf(buf, buflen, format_string, sdata->field); \
79 }
80 #define IEEE80211_IF_FMT_DEC(name, field) \
81 IEEE80211_IF_FMT(name, field, "%d\n")
82 #define IEEE80211_IF_FMT_HEX(name, field) \
83 IEEE80211_IF_FMT(name, field, "%#x\n")
84 #define IEEE80211_IF_FMT_LHEX(name, field) \
85 IEEE80211_IF_FMT(name, field, "%#lx\n")
86 #define IEEE80211_IF_FMT_SIZE(name, field) \
87 IEEE80211_IF_FMT(name, field, "%zd\n")
88
89 #define IEEE80211_IF_FMT_ATOMIC(name, field) \
90 static ssize_t ieee80211_if_fmt_##name( \
91 const struct ieee80211_sub_if_data *sdata, \
92 char *buf, int buflen) \
93 { \
94 return scnprintf(buf, buflen, "%d\n", atomic_read(&sdata->field));\
95 }
96
97 #define IEEE80211_IF_FMT_MAC(name, field) \
98 static ssize_t ieee80211_if_fmt_##name( \
99 const struct ieee80211_sub_if_data *sdata, char *buf, \
100 int buflen) \
101 { \
102 return scnprintf(buf, buflen, "%pM\n", sdata->field); \
103 }
104
105 #define IEEE80211_IF_FMT_DEC_DIV_16(name, field) \
106 static ssize_t ieee80211_if_fmt_##name( \
107 const struct ieee80211_sub_if_data *sdata, \
108 char *buf, int buflen) \
109 { \
110 return scnprintf(buf, buflen, "%d\n", sdata->field / 16); \
111 }
112
113 #define __IEEE80211_IF_FILE(name, _write) \
114 static ssize_t ieee80211_if_read_##name(struct file *file, \
115 char __user *userbuf, \
116 size_t count, loff_t *ppos) \
117 { \
118 return ieee80211_if_read(file->private_data, \
119 userbuf, count, ppos, \
120 ieee80211_if_fmt_##name); \
121 } \
122 static const struct file_operations name##_ops = { \
123 .read = ieee80211_if_read_##name, \
124 .write = (_write), \
125 .open = mac80211_open_file_generic, \
126 .llseek = generic_file_llseek, \
127 }
128
129 #define __IEEE80211_IF_FILE_W(name) \
130 static ssize_t ieee80211_if_write_##name(struct file *file, \
131 const char __user *userbuf, \
132 size_t count, loff_t *ppos) \
133 { \
134 return ieee80211_if_write(file->private_data, userbuf, count, \
135 ppos, ieee80211_if_parse_##name); \
136 } \
137 __IEEE80211_IF_FILE(name, ieee80211_if_write_##name)
138
139
140 #define IEEE80211_IF_FILE(name, field, format) \
141 IEEE80211_IF_FMT_##format(name, field) \
142 __IEEE80211_IF_FILE(name, NULL)
143
144 /* common attributes */
145 IEEE80211_IF_FILE(drop_unencrypted, drop_unencrypted, DEC);
146 IEEE80211_IF_FILE(rc_rateidx_mask_2ghz, rc_rateidx_mask[IEEE80211_BAND_2GHZ],
147 HEX);
148 IEEE80211_IF_FILE(rc_rateidx_mask_5ghz, rc_rateidx_mask[IEEE80211_BAND_5GHZ],
149 HEX);
150 IEEE80211_IF_FILE(flags, flags, HEX);
151 IEEE80211_IF_FILE(state, state, LHEX);
152 IEEE80211_IF_FILE(channel_type, vif.bss_conf.channel_type, DEC);
153
154 /* STA attributes */
155 IEEE80211_IF_FILE(bssid, u.mgd.bssid, MAC);
156 IEEE80211_IF_FILE(aid, u.mgd.aid, DEC);
157 IEEE80211_IF_FILE(last_beacon, u.mgd.last_beacon_signal, DEC);
158 IEEE80211_IF_FILE(ave_beacon, u.mgd.ave_beacon_signal, DEC_DIV_16);
159
160 static int ieee80211_set_smps(struct ieee80211_sub_if_data *sdata,
161 enum ieee80211_smps_mode smps_mode)
162 {
163 struct ieee80211_local *local = sdata->local;
164 int err;
165
166 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_STATIC_SMPS) &&
167 smps_mode == IEEE80211_SMPS_STATIC)
168 return -EINVAL;
169
170 /* auto should be dynamic if in PS mode */
171 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS) &&
172 (smps_mode == IEEE80211_SMPS_DYNAMIC ||
173 smps_mode == IEEE80211_SMPS_AUTOMATIC))
174 return -EINVAL;
175
176 /* supported only on managed interfaces for now */
177 if (sdata->vif.type != NL80211_IFTYPE_STATION)
178 return -EOPNOTSUPP;
179
180 mutex_lock(&sdata->u.mgd.mtx);
181 err = __ieee80211_request_smps(sdata, smps_mode);
182 mutex_unlock(&sdata->u.mgd.mtx);
183
184 return err;
185 }
186
187 static const char *smps_modes[IEEE80211_SMPS_NUM_MODES] = {
188 [IEEE80211_SMPS_AUTOMATIC] = "auto",
189 [IEEE80211_SMPS_OFF] = "off",
190 [IEEE80211_SMPS_STATIC] = "static",
191 [IEEE80211_SMPS_DYNAMIC] = "dynamic",
192 };
193
194 static ssize_t ieee80211_if_fmt_smps(const struct ieee80211_sub_if_data *sdata,
195 char *buf, int buflen)
196 {
197 if (sdata->vif.type != NL80211_IFTYPE_STATION)
198 return -EOPNOTSUPP;
199
200 return snprintf(buf, buflen, "request: %s\nused: %s\n",
201 smps_modes[sdata->u.mgd.req_smps],
202 smps_modes[sdata->u.mgd.ap_smps]);
203 }
204
205 static ssize_t ieee80211_if_parse_smps(struct ieee80211_sub_if_data *sdata,
206 const char *buf, int buflen)
207 {
208 enum ieee80211_smps_mode mode;
209
210 for (mode = 0; mode < IEEE80211_SMPS_NUM_MODES; mode++) {
211 if (strncmp(buf, smps_modes[mode], buflen) == 0) {
212 int err = ieee80211_set_smps(sdata, mode);
213 if (!err)
214 return buflen;
215 return err;
216 }
217 }
218
219 return -EINVAL;
220 }
221
222 __IEEE80211_IF_FILE_W(smps);
223
224 static ssize_t ieee80211_if_fmt_tkip_mic_test(
225 const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
226 {
227 return -EOPNOTSUPP;
228 }
229
230 static int hwaddr_aton(const char *txt, u8 *addr)
231 {
232 int i;
233
234 for (i = 0; i < ETH_ALEN; i++) {
235 int a, b;
236
237 a = hex_to_bin(*txt++);
238 if (a < 0)
239 return -1;
240 b = hex_to_bin(*txt++);
241 if (b < 0)
242 return -1;
243 *addr++ = (a << 4) | b;
244 if (i < 5 && *txt++ != ':')
245 return -1;
246 }
247
248 return 0;
249 }
250
251 static ssize_t ieee80211_if_parse_tkip_mic_test(
252 struct ieee80211_sub_if_data *sdata, const char *buf, int buflen)
253 {
254 struct ieee80211_local *local = sdata->local;
255 u8 addr[ETH_ALEN];
256 struct sk_buff *skb;
257 struct ieee80211_hdr *hdr;
258 __le16 fc;
259
260 /*
261 * Assume colon-delimited MAC address with possible white space
262 * following.
263 */
264 if (buflen < 3 * ETH_ALEN - 1)
265 return -EINVAL;
266 if (hwaddr_aton(buf, addr) < 0)
267 return -EINVAL;
268
269 if (!ieee80211_sdata_running(sdata))
270 return -ENOTCONN;
271
272 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24 + 100);
273 if (!skb)
274 return -ENOMEM;
275 skb_reserve(skb, local->hw.extra_tx_headroom);
276
277 hdr = (struct ieee80211_hdr *) skb_put(skb, 24);
278 memset(hdr, 0, 24);
279 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
280
281 switch (sdata->vif.type) {
282 case NL80211_IFTYPE_AP:
283 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
284 /* DA BSSID SA */
285 memcpy(hdr->addr1, addr, ETH_ALEN);
286 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
287 memcpy(hdr->addr3, sdata->vif.addr, ETH_ALEN);
288 break;
289 case NL80211_IFTYPE_STATION:
290 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
291 /* BSSID SA DA */
292 if (sdata->vif.bss_conf.bssid == NULL) {
293 dev_kfree_skb(skb);
294 return -ENOTCONN;
295 }
296 memcpy(hdr->addr1, sdata->vif.bss_conf.bssid, ETH_ALEN);
297 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
298 memcpy(hdr->addr3, addr, ETH_ALEN);
299 break;
300 default:
301 dev_kfree_skb(skb);
302 return -EOPNOTSUPP;
303 }
304 hdr->frame_control = fc;
305
306 /*
307 * Add some length to the test frame to make it look bit more valid.
308 * The exact contents does not matter since the recipient is required
309 * to drop this because of the Michael MIC failure.
310 */
311 memset(skb_put(skb, 50), 0, 50);
312
313 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_TKIP_MIC_FAILURE;
314
315 ieee80211_tx_skb(sdata, skb);
316
317 return buflen;
318 }
319
320 __IEEE80211_IF_FILE_W(tkip_mic_test);
321
322 /* AP attributes */
323 IEEE80211_IF_FILE(num_sta_ps, u.ap.num_sta_ps, ATOMIC);
324 IEEE80211_IF_FILE(dtim_count, u.ap.dtim_count, DEC);
325
326 static ssize_t ieee80211_if_fmt_num_buffered_multicast(
327 const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
328 {
329 return scnprintf(buf, buflen, "%u\n",
330 skb_queue_len(&sdata->u.ap.ps_bc_buf));
331 }
332 __IEEE80211_IF_FILE(num_buffered_multicast, NULL);
333
334 /* WDS attributes */
335 IEEE80211_IF_FILE(peer, u.wds.remote_addr, MAC);
336
337 #ifdef CONFIG_MAC80211_MESH
338 /* Mesh stats attributes */
339 IEEE80211_IF_FILE(fwded_mcast, u.mesh.mshstats.fwded_mcast, DEC);
340 IEEE80211_IF_FILE(fwded_unicast, u.mesh.mshstats.fwded_unicast, DEC);
341 IEEE80211_IF_FILE(fwded_frames, u.mesh.mshstats.fwded_frames, DEC);
342 IEEE80211_IF_FILE(dropped_frames_ttl, u.mesh.mshstats.dropped_frames_ttl, DEC);
343 IEEE80211_IF_FILE(dropped_frames_no_route,
344 u.mesh.mshstats.dropped_frames_no_route, DEC);
345 IEEE80211_IF_FILE(estab_plinks, u.mesh.mshstats.estab_plinks, ATOMIC);
346
347 /* Mesh parameters */
348 IEEE80211_IF_FILE(dot11MeshMaxRetries,
349 u.mesh.mshcfg.dot11MeshMaxRetries, DEC);
350 IEEE80211_IF_FILE(dot11MeshRetryTimeout,
351 u.mesh.mshcfg.dot11MeshRetryTimeout, DEC);
352 IEEE80211_IF_FILE(dot11MeshConfirmTimeout,
353 u.mesh.mshcfg.dot11MeshConfirmTimeout, DEC);
354 IEEE80211_IF_FILE(dot11MeshHoldingTimeout,
355 u.mesh.mshcfg.dot11MeshHoldingTimeout, DEC);
356 IEEE80211_IF_FILE(dot11MeshTTL, u.mesh.mshcfg.dot11MeshTTL, DEC);
357 IEEE80211_IF_FILE(element_ttl, u.mesh.mshcfg.element_ttl, DEC);
358 IEEE80211_IF_FILE(auto_open_plinks, u.mesh.mshcfg.auto_open_plinks, DEC);
359 IEEE80211_IF_FILE(dot11MeshMaxPeerLinks,
360 u.mesh.mshcfg.dot11MeshMaxPeerLinks, DEC);
361 IEEE80211_IF_FILE(dot11MeshHWMPactivePathTimeout,
362 u.mesh.mshcfg.dot11MeshHWMPactivePathTimeout, DEC);
363 IEEE80211_IF_FILE(dot11MeshHWMPpreqMinInterval,
364 u.mesh.mshcfg.dot11MeshHWMPpreqMinInterval, DEC);
365 IEEE80211_IF_FILE(dot11MeshHWMPnetDiameterTraversalTime,
366 u.mesh.mshcfg.dot11MeshHWMPnetDiameterTraversalTime, DEC);
367 IEEE80211_IF_FILE(dot11MeshHWMPmaxPREQretries,
368 u.mesh.mshcfg.dot11MeshHWMPmaxPREQretries, DEC);
369 IEEE80211_IF_FILE(path_refresh_time,
370 u.mesh.mshcfg.path_refresh_time, DEC);
371 IEEE80211_IF_FILE(min_discovery_timeout,
372 u.mesh.mshcfg.min_discovery_timeout, DEC);
373 IEEE80211_IF_FILE(dot11MeshHWMPRootMode,
374 u.mesh.mshcfg.dot11MeshHWMPRootMode, DEC);
375 IEEE80211_IF_FILE(dot11MeshGateAnnouncementProtocol,
376 u.mesh.mshcfg.dot11MeshGateAnnouncementProtocol, DEC);
377 IEEE80211_IF_FILE(dot11MeshHWMPRannInterval,
378 u.mesh.mshcfg.dot11MeshHWMPRannInterval, DEC);
379 #endif
380
381
382 #define DEBUGFS_ADD(name) \
383 debugfs_create_file(#name, 0400, sdata->debugfs.dir, \
384 sdata, &name##_ops);
385
386 #define DEBUGFS_ADD_MODE(name, mode) \
387 debugfs_create_file(#name, mode, sdata->debugfs.dir, \
388 sdata, &name##_ops);
389
390 static void add_sta_files(struct ieee80211_sub_if_data *sdata)
391 {
392 DEBUGFS_ADD(drop_unencrypted);
393 DEBUGFS_ADD(flags);
394 DEBUGFS_ADD(state);
395 DEBUGFS_ADD(channel_type);
396 DEBUGFS_ADD(rc_rateidx_mask_2ghz);
397 DEBUGFS_ADD(rc_rateidx_mask_5ghz);
398
399 DEBUGFS_ADD(bssid);
400 DEBUGFS_ADD(aid);
401 DEBUGFS_ADD(last_beacon);
402 DEBUGFS_ADD(ave_beacon);
403 DEBUGFS_ADD_MODE(smps, 0600);
404 DEBUGFS_ADD_MODE(tkip_mic_test, 0200);
405 }
406
407 static void add_ap_files(struct ieee80211_sub_if_data *sdata)
408 {
409 DEBUGFS_ADD(drop_unencrypted);
410 DEBUGFS_ADD(flags);
411 DEBUGFS_ADD(state);
412 DEBUGFS_ADD(channel_type);
413 DEBUGFS_ADD(rc_rateidx_mask_2ghz);
414 DEBUGFS_ADD(rc_rateidx_mask_5ghz);
415
416 DEBUGFS_ADD(num_sta_ps);
417 DEBUGFS_ADD(dtim_count);
418 DEBUGFS_ADD(num_buffered_multicast);
419 DEBUGFS_ADD_MODE(tkip_mic_test, 0200);
420 }
421
422 static void add_wds_files(struct ieee80211_sub_if_data *sdata)
423 {
424 DEBUGFS_ADD(drop_unencrypted);
425 DEBUGFS_ADD(flags);
426 DEBUGFS_ADD(state);
427 DEBUGFS_ADD(channel_type);
428 DEBUGFS_ADD(rc_rateidx_mask_2ghz);
429 DEBUGFS_ADD(rc_rateidx_mask_5ghz);
430
431 DEBUGFS_ADD(peer);
432 }
433
434 static void add_vlan_files(struct ieee80211_sub_if_data *sdata)
435 {
436 DEBUGFS_ADD(drop_unencrypted);
437 DEBUGFS_ADD(flags);
438 DEBUGFS_ADD(state);
439 DEBUGFS_ADD(channel_type);
440 DEBUGFS_ADD(rc_rateidx_mask_2ghz);
441 DEBUGFS_ADD(rc_rateidx_mask_5ghz);
442 }
443
444 static void add_monitor_files(struct ieee80211_sub_if_data *sdata)
445 {
446 DEBUGFS_ADD(flags);
447 DEBUGFS_ADD(state);
448 DEBUGFS_ADD(channel_type);
449 }
450
451 #ifdef CONFIG_MAC80211_MESH
452
453 static void add_mesh_stats(struct ieee80211_sub_if_data *sdata)
454 {
455 struct dentry *dir = debugfs_create_dir("mesh_stats",
456 sdata->debugfs.dir);
457
458 #define MESHSTATS_ADD(name)\
459 debugfs_create_file(#name, 0400, dir, sdata, &name##_ops);
460
461 MESHSTATS_ADD(fwded_mcast);
462 MESHSTATS_ADD(fwded_unicast);
463 MESHSTATS_ADD(fwded_frames);
464 MESHSTATS_ADD(dropped_frames_ttl);
465 MESHSTATS_ADD(dropped_frames_no_route);
466 MESHSTATS_ADD(estab_plinks);
467 #undef MESHSTATS_ADD
468 }
469
470 static void add_mesh_config(struct ieee80211_sub_if_data *sdata)
471 {
472 struct dentry *dir = debugfs_create_dir("mesh_config",
473 sdata->debugfs.dir);
474
475 #define MESHPARAMS_ADD(name) \
476 debugfs_create_file(#name, 0600, dir, sdata, &name##_ops);
477
478 MESHPARAMS_ADD(dot11MeshMaxRetries);
479 MESHPARAMS_ADD(dot11MeshRetryTimeout);
480 MESHPARAMS_ADD(dot11MeshConfirmTimeout);
481 MESHPARAMS_ADD(dot11MeshHoldingTimeout);
482 MESHPARAMS_ADD(dot11MeshTTL);
483 MESHPARAMS_ADD(element_ttl);
484 MESHPARAMS_ADD(auto_open_plinks);
485 MESHPARAMS_ADD(dot11MeshMaxPeerLinks);
486 MESHPARAMS_ADD(dot11MeshHWMPactivePathTimeout);
487 MESHPARAMS_ADD(dot11MeshHWMPpreqMinInterval);
488 MESHPARAMS_ADD(dot11MeshHWMPnetDiameterTraversalTime);
489 MESHPARAMS_ADD(dot11MeshHWMPmaxPREQretries);
490 MESHPARAMS_ADD(path_refresh_time);
491 MESHPARAMS_ADD(min_discovery_timeout);
492 MESHPARAMS_ADD(dot11MeshHWMPRootMode);
493 MESHPARAMS_ADD(dot11MeshHWMPRannInterval);
494 MESHPARAMS_ADD(dot11MeshGateAnnouncementProtocol);
495 #undef MESHPARAMS_ADD
496 }
497 #endif
498
499 static void add_files(struct ieee80211_sub_if_data *sdata)
500 {
501 if (!sdata->debugfs.dir)
502 return;
503
504 switch (sdata->vif.type) {
505 case NL80211_IFTYPE_MESH_POINT:
506 #ifdef CONFIG_MAC80211_MESH
507 add_mesh_stats(sdata);
508 add_mesh_config(sdata);
509 #endif
510 break;
511 case NL80211_IFTYPE_STATION:
512 add_sta_files(sdata);
513 break;
514 case NL80211_IFTYPE_ADHOC:
515 /* XXX */
516 break;
517 case NL80211_IFTYPE_AP:
518 add_ap_files(sdata);
519 break;
520 case NL80211_IFTYPE_WDS:
521 add_wds_files(sdata);
522 break;
523 case NL80211_IFTYPE_MONITOR:
524 add_monitor_files(sdata);
525 break;
526 case NL80211_IFTYPE_AP_VLAN:
527 add_vlan_files(sdata);
528 break;
529 default:
530 break;
531 }
532 }
533
534 void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata)
535 {
536 char buf[10+IFNAMSIZ];
537
538 sprintf(buf, "netdev:%s", sdata->name);
539 sdata->debugfs.dir = debugfs_create_dir(buf,
540 sdata->local->hw.wiphy->debugfsdir);
541 if (sdata->debugfs.dir)
542 sdata->debugfs.subdir_stations = debugfs_create_dir("stations",
543 sdata->debugfs.dir);
544 add_files(sdata);
545 }
546
547 void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata)
548 {
549 if (!sdata->debugfs.dir)
550 return;
551
552 debugfs_remove_recursive(sdata->debugfs.dir);
553 sdata->debugfs.dir = NULL;
554 }
555
556 void ieee80211_debugfs_rename_netdev(struct ieee80211_sub_if_data *sdata)
557 {
558 struct dentry *dir;
559 char buf[10 + IFNAMSIZ];
560
561 dir = sdata->debugfs.dir;
562
563 if (!dir)
564 return;
565
566 sprintf(buf, "netdev:%s", sdata->name);
567 if (!debugfs_rename(dir->d_parent, dir, dir->d_parent, buf))
568 printk(KERN_ERR "mac80211: debugfs: failed to rename debugfs "
569 "dir to %s\n", buf);
570 }
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