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mm owner: fix race between swapoff and exit
[linux-2.6/next.git] / net / mac80211 / debugfs_netdev.c
blob8165df578c92ecf5b29f84b315f0583809ac9840
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 IEEE80211_IF_FILE(num_beacons_sta, u.sta.num_beacons, DEC);
177
178 static ssize_t ieee80211_if_fmt_flags(
179 const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
180 {
181 return scnprintf(buf, buflen, "%s%s%s%s%s%s%s\n",
182 sdata->u.sta.flags & IEEE80211_STA_SSID_SET ? "SSID\n" : "",
183 sdata->u.sta.flags & IEEE80211_STA_BSSID_SET ? "BSSID\n" : "",
184 sdata->u.sta.flags & IEEE80211_STA_PREV_BSSID_SET ? "prev BSSID\n" : "",
185 sdata->u.sta.flags & IEEE80211_STA_AUTHENTICATED ? "AUTH\n" : "",
186 sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED ? "ASSOC\n" : "",
187 sdata->u.sta.flags & IEEE80211_STA_PROBEREQ_POLL ? "PROBEREQ POLL\n" : "",
188 sdata->bss_conf.use_cts_prot ? "CTS prot\n" : "");
189 }
190 __IEEE80211_IF_FILE(flags);
191
192 /* AP attributes */
193 IEEE80211_IF_FILE(num_sta_ps, u.ap.num_sta_ps, ATOMIC);
194 IEEE80211_IF_FILE(dtim_count, u.ap.dtim_count, DEC);
195 IEEE80211_IF_FILE(num_beacons, u.ap.num_beacons, DEC);
196
197 static ssize_t ieee80211_if_fmt_num_buffered_multicast(
198 const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
199 {
200 return scnprintf(buf, buflen, "%u\n",
201 skb_queue_len(&sdata->u.ap.ps_bc_buf));
202 }
203 __IEEE80211_IF_FILE(num_buffered_multicast);
204
205 /* WDS attributes */
206 IEEE80211_IF_FILE(peer, u.wds.remote_addr, MAC);
207
208 #ifdef CONFIG_MAC80211_MESH
209 /* Mesh stats attributes */
210 IEEE80211_IF_FILE(fwded_frames, u.sta.mshstats.fwded_frames, DEC);
211 IEEE80211_IF_FILE(dropped_frames_ttl, u.sta.mshstats.dropped_frames_ttl, DEC);
212 IEEE80211_IF_FILE(dropped_frames_no_route,
213 u.sta.mshstats.dropped_frames_no_route, DEC);
214 IEEE80211_IF_FILE(estab_plinks, u.sta.mshstats.estab_plinks, ATOMIC);
215
216 /* Mesh parameters */
217 IEEE80211_IF_WFILE(dot11MeshMaxRetries,
218 u.sta.mshcfg.dot11MeshMaxRetries, DEC, u8);
219 IEEE80211_IF_WFILE(dot11MeshRetryTimeout,
220 u.sta.mshcfg.dot11MeshRetryTimeout, DEC, u16);
221 IEEE80211_IF_WFILE(dot11MeshConfirmTimeout,
222 u.sta.mshcfg.dot11MeshConfirmTimeout, DEC, u16);
223 IEEE80211_IF_WFILE(dot11MeshHoldingTimeout,
224 u.sta.mshcfg.dot11MeshHoldingTimeout, DEC, u16);
225 IEEE80211_IF_WFILE(dot11MeshTTL, u.sta.mshcfg.dot11MeshTTL, DEC, u8);
226 IEEE80211_IF_WFILE(auto_open_plinks, u.sta.mshcfg.auto_open_plinks, DEC, u8);
227 IEEE80211_IF_WFILE(dot11MeshMaxPeerLinks,
228 u.sta.mshcfg.dot11MeshMaxPeerLinks, DEC, u16);
229 IEEE80211_IF_WFILE(dot11MeshHWMPactivePathTimeout,
230 u.sta.mshcfg.dot11MeshHWMPactivePathTimeout, DEC, u32);
231 IEEE80211_IF_WFILE(dot11MeshHWMPpreqMinInterval,
232 u.sta.mshcfg.dot11MeshHWMPpreqMinInterval, DEC, u16);
233 IEEE80211_IF_WFILE(dot11MeshHWMPnetDiameterTraversalTime,
234 u.sta.mshcfg.dot11MeshHWMPnetDiameterTraversalTime, DEC, u16);
235 IEEE80211_IF_WFILE(dot11MeshHWMPmaxPREQretries,
236 u.sta.mshcfg.dot11MeshHWMPmaxPREQretries, DEC, u8);
237 IEEE80211_IF_WFILE(path_refresh_time,
238 u.sta.mshcfg.path_refresh_time, DEC, u32);
239 IEEE80211_IF_WFILE(min_discovery_timeout,
240 u.sta.mshcfg.min_discovery_timeout, DEC, u16);
241 #endif
242
243
244 #define DEBUGFS_ADD(name, type)\
245 sdata->debugfs.type.name = debugfs_create_file(#name, 0400,\
246 sdata->debugfsdir, sdata, &name##_ops);
247
248 static void add_sta_files(struct ieee80211_sub_if_data *sdata)
249 {
250 DEBUGFS_ADD(drop_unencrypted, sta);
251 DEBUGFS_ADD(force_unicast_rateidx, sta);
252 DEBUGFS_ADD(max_ratectrl_rateidx, sta);
253
254 DEBUGFS_ADD(state, sta);
255 DEBUGFS_ADD(bssid, sta);
256 DEBUGFS_ADD(prev_bssid, sta);
257 DEBUGFS_ADD(ssid_len, sta);
258 DEBUGFS_ADD(aid, sta);
259 DEBUGFS_ADD(ap_capab, sta);
260 DEBUGFS_ADD(capab, sta);
261 DEBUGFS_ADD(extra_ie_len, sta);
262 DEBUGFS_ADD(auth_tries, sta);
263 DEBUGFS_ADD(assoc_tries, sta);
264 DEBUGFS_ADD(auth_algs, sta);
265 DEBUGFS_ADD(auth_alg, sta);
266 DEBUGFS_ADD(auth_transaction, sta);
267 DEBUGFS_ADD(flags, sta);
268 DEBUGFS_ADD(num_beacons_sta, sta);
269 }
270
271 static void add_ap_files(struct ieee80211_sub_if_data *sdata)
272 {
273 DEBUGFS_ADD(drop_unencrypted, ap);
274 DEBUGFS_ADD(force_unicast_rateidx, ap);
275 DEBUGFS_ADD(max_ratectrl_rateidx, ap);
276
277 DEBUGFS_ADD(num_sta_ps, ap);
278 DEBUGFS_ADD(dtim_count, ap);
279 DEBUGFS_ADD(num_beacons, ap);
280 DEBUGFS_ADD(num_buffered_multicast, ap);
281 }
282
283 static void add_wds_files(struct ieee80211_sub_if_data *sdata)
284 {
285 DEBUGFS_ADD(drop_unencrypted, wds);
286 DEBUGFS_ADD(force_unicast_rateidx, wds);
287 DEBUGFS_ADD(max_ratectrl_rateidx, wds);
288
289 DEBUGFS_ADD(peer, wds);
290 }
291
292 static void add_vlan_files(struct ieee80211_sub_if_data *sdata)
293 {
294 DEBUGFS_ADD(drop_unencrypted, vlan);
295 DEBUGFS_ADD(force_unicast_rateidx, vlan);
296 DEBUGFS_ADD(max_ratectrl_rateidx, vlan);
297 }
298
299 static void add_monitor_files(struct ieee80211_sub_if_data *sdata)
300 {
301 }
302
303 #ifdef CONFIG_MAC80211_MESH
304 #define MESHSTATS_ADD(name)\
305 sdata->mesh_stats.name = debugfs_create_file(#name, 0400,\
306 sdata->mesh_stats_dir, sdata, &name##_ops);
307
308 static void add_mesh_stats(struct ieee80211_sub_if_data *sdata)
309 {
310 sdata->mesh_stats_dir = debugfs_create_dir("mesh_stats",
311 sdata->debugfsdir);
312 MESHSTATS_ADD(fwded_frames);
313 MESHSTATS_ADD(dropped_frames_ttl);
314 MESHSTATS_ADD(dropped_frames_no_route);
315 MESHSTATS_ADD(estab_plinks);
316 }
317
318 #define MESHPARAMS_ADD(name)\
319 sdata->mesh_config.name = debugfs_create_file(#name, 0600,\
320 sdata->mesh_config_dir, sdata, &name##_ops);
321
322 static void add_mesh_config(struct ieee80211_sub_if_data *sdata)
323 {
324 sdata->mesh_config_dir = debugfs_create_dir("mesh_config",
325 sdata->debugfsdir);
326 MESHPARAMS_ADD(dot11MeshMaxRetries);
327 MESHPARAMS_ADD(dot11MeshRetryTimeout);
328 MESHPARAMS_ADD(dot11MeshConfirmTimeout);
329 MESHPARAMS_ADD(dot11MeshHoldingTimeout);
330 MESHPARAMS_ADD(dot11MeshTTL);
331 MESHPARAMS_ADD(auto_open_plinks);
332 MESHPARAMS_ADD(dot11MeshMaxPeerLinks);
333 MESHPARAMS_ADD(dot11MeshHWMPactivePathTimeout);
334 MESHPARAMS_ADD(dot11MeshHWMPpreqMinInterval);
335 MESHPARAMS_ADD(dot11MeshHWMPnetDiameterTraversalTime);
336 MESHPARAMS_ADD(dot11MeshHWMPmaxPREQretries);
337 MESHPARAMS_ADD(path_refresh_time);
338 MESHPARAMS_ADD(min_discovery_timeout);
339 }
340 #endif
341
342 static void add_files(struct ieee80211_sub_if_data *sdata)
343 {
344 if (!sdata->debugfsdir)
345 return;
346
347 switch (sdata->vif.type) {
348 case IEEE80211_IF_TYPE_MESH_POINT:
349 #ifdef CONFIG_MAC80211_MESH
350 add_mesh_stats(sdata);
351 add_mesh_config(sdata);
352 #endif
353 /* fall through */
354 case IEEE80211_IF_TYPE_STA:
355 case IEEE80211_IF_TYPE_IBSS:
356 add_sta_files(sdata);
357 break;
358 case IEEE80211_IF_TYPE_AP:
359 add_ap_files(sdata);
360 break;
361 case IEEE80211_IF_TYPE_WDS:
362 add_wds_files(sdata);
363 break;
364 case IEEE80211_IF_TYPE_MNTR:
365 add_monitor_files(sdata);
366 break;
367 case IEEE80211_IF_TYPE_VLAN:
368 add_vlan_files(sdata);
369 break;
370 default:
371 break;
372 }
373 }
374
375 #define DEBUGFS_DEL(name, type) \
376 do { \
377 debugfs_remove(sdata->debugfs.type.name); \
378 sdata->debugfs.type.name = NULL; \
379 } while (0)
380
381 static void del_sta_files(struct ieee80211_sub_if_data *sdata)
382 {
383 DEBUGFS_DEL(drop_unencrypted, sta);
384 DEBUGFS_DEL(force_unicast_rateidx, sta);
385 DEBUGFS_DEL(max_ratectrl_rateidx, sta);
386
387 DEBUGFS_DEL(state, sta);
388 DEBUGFS_DEL(bssid, sta);
389 DEBUGFS_DEL(prev_bssid, sta);
390 DEBUGFS_DEL(ssid_len, sta);
391 DEBUGFS_DEL(aid, sta);
392 DEBUGFS_DEL(ap_capab, sta);
393 DEBUGFS_DEL(capab, sta);
394 DEBUGFS_DEL(extra_ie_len, sta);
395 DEBUGFS_DEL(auth_tries, sta);
396 DEBUGFS_DEL(assoc_tries, sta);
397 DEBUGFS_DEL(auth_algs, sta);
398 DEBUGFS_DEL(auth_alg, sta);
399 DEBUGFS_DEL(auth_transaction, sta);
400 DEBUGFS_DEL(flags, sta);
401 DEBUGFS_DEL(num_beacons_sta, sta);
402 }
403
404 static void del_ap_files(struct ieee80211_sub_if_data *sdata)
405 {
406 DEBUGFS_DEL(drop_unencrypted, ap);
407 DEBUGFS_DEL(force_unicast_rateidx, ap);
408 DEBUGFS_DEL(max_ratectrl_rateidx, ap);
409
410 DEBUGFS_DEL(num_sta_ps, ap);
411 DEBUGFS_DEL(dtim_count, ap);
412 DEBUGFS_DEL(num_beacons, ap);
413 DEBUGFS_DEL(num_buffered_multicast, ap);
414 }
415
416 static void del_wds_files(struct ieee80211_sub_if_data *sdata)
417 {
418 DEBUGFS_DEL(drop_unencrypted, wds);
419 DEBUGFS_DEL(force_unicast_rateidx, wds);
420 DEBUGFS_DEL(max_ratectrl_rateidx, wds);
421
422 DEBUGFS_DEL(peer, wds);
423 }
424
425 static void del_vlan_files(struct ieee80211_sub_if_data *sdata)
426 {
427 DEBUGFS_DEL(drop_unencrypted, vlan);
428 DEBUGFS_DEL(force_unicast_rateidx, vlan);
429 DEBUGFS_DEL(max_ratectrl_rateidx, vlan);
430 }
431
432 static void del_monitor_files(struct ieee80211_sub_if_data *sdata)
433 {
434 }
435
436 #ifdef CONFIG_MAC80211_MESH
437 #define MESHSTATS_DEL(name) \
438 do { \
439 debugfs_remove(sdata->mesh_stats.name); \
440 sdata->mesh_stats.name = NULL; \
441 } while (0)
442
443 static void del_mesh_stats(struct ieee80211_sub_if_data *sdata)
444 {
445 MESHSTATS_DEL(fwded_frames);
446 MESHSTATS_DEL(dropped_frames_ttl);
447 MESHSTATS_DEL(dropped_frames_no_route);
448 MESHSTATS_DEL(estab_plinks);
449 debugfs_remove(sdata->mesh_stats_dir);
450 sdata->mesh_stats_dir = NULL;
451 }
452
453 #define MESHPARAMS_DEL(name) \
454 do { \
455 debugfs_remove(sdata->mesh_config.name); \
456 sdata->mesh_config.name = NULL; \
457 } while (0)
458
459 static void del_mesh_config(struct ieee80211_sub_if_data *sdata)
460 {
461 MESHPARAMS_DEL(dot11MeshMaxRetries);
462 MESHPARAMS_DEL(dot11MeshRetryTimeout);
463 MESHPARAMS_DEL(dot11MeshConfirmTimeout);
464 MESHPARAMS_DEL(dot11MeshHoldingTimeout);
465 MESHPARAMS_DEL(dot11MeshTTL);
466 MESHPARAMS_DEL(auto_open_plinks);
467 MESHPARAMS_DEL(dot11MeshMaxPeerLinks);
468 MESHPARAMS_DEL(dot11MeshHWMPactivePathTimeout);
469 MESHPARAMS_DEL(dot11MeshHWMPpreqMinInterval);
470 MESHPARAMS_DEL(dot11MeshHWMPnetDiameterTraversalTime);
471 MESHPARAMS_DEL(dot11MeshHWMPmaxPREQretries);
472 MESHPARAMS_DEL(path_refresh_time);
473 MESHPARAMS_DEL(min_discovery_timeout);
474 debugfs_remove(sdata->mesh_config_dir);
475 sdata->mesh_config_dir = NULL;
476 }
477 #endif
478
479 static void del_files(struct ieee80211_sub_if_data *sdata)
480 {
481 if (!sdata->debugfsdir)
482 return;
483
484 switch (sdata->vif.type) {
485 case IEEE80211_IF_TYPE_MESH_POINT:
486 #ifdef CONFIG_MAC80211_MESH
487 del_mesh_stats(sdata);
488 del_mesh_config(sdata);
489 #endif
490 /* fall through */
491 case IEEE80211_IF_TYPE_STA:
492 case IEEE80211_IF_TYPE_IBSS:
493 del_sta_files(sdata);
494 break;
495 case IEEE80211_IF_TYPE_AP:
496 del_ap_files(sdata);
497 break;
498 case IEEE80211_IF_TYPE_WDS:
499 del_wds_files(sdata);
500 break;
501 case IEEE80211_IF_TYPE_MNTR:
502 del_monitor_files(sdata);
503 break;
504 case IEEE80211_IF_TYPE_VLAN:
505 del_vlan_files(sdata);
506 break;
507 default:
508 break;
509 }
510 }
511
512 static int notif_registered;
513
514 void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata)
515 {
516 char buf[10+IFNAMSIZ];
517
518 if (!notif_registered)
519 return;
520
521 sprintf(buf, "netdev:%s", sdata->dev->name);
522 sdata->debugfsdir = debugfs_create_dir(buf,
523 sdata->local->hw.wiphy->debugfsdir);
524 add_files(sdata);
525 }
526
527 void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata)
528 {
529 del_files(sdata);
530 debugfs_remove(sdata->debugfsdir);
531 sdata->debugfsdir = NULL;
532 }
533
534 static int netdev_notify(struct notifier_block *nb,
535 unsigned long state,
536 void *ndev)
537 {
538 struct net_device *dev = ndev;
539 struct dentry *dir;
540 struct ieee80211_sub_if_data *sdata;
541 char buf[10+IFNAMSIZ];
542
543 if (state != NETDEV_CHANGENAME)
544 return 0;
545
546 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
547 return 0;
548
549 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
550 return 0;
551
552 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
553
554 sprintf(buf, "netdev:%s", dev->name);
555 dir = sdata->debugfsdir;
556 if (!debugfs_rename(dir->d_parent, dir, dir->d_parent, buf))
557 printk(KERN_ERR "mac80211: debugfs: failed to rename debugfs "
558 "dir to %s\n", buf);
559
560 return 0;
561 }
562
563 static struct notifier_block mac80211_debugfs_netdev_notifier = {
564 .notifier_call = netdev_notify,
565 };
566
567 void ieee80211_debugfs_netdev_init(void)
568 {
569 int err;
570
571 err = register_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
572 if (err) {
573 printk(KERN_ERR
574 "mac80211: failed to install netdev notifier,"
575 " disabling per-netdev debugfs!\n");
576 } else
577 notif_registered = 1;
578 }
579
580 void ieee80211_debugfs_netdev_exit(void)
581 {
582 unregister_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
583 notif_registered = 0;
584 }
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