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#define IEEE80211_IF_FMT(name, field, format_string) \
45static ssize_t ieee80211_if_fmt_##name( \
46 const struct ieee80211_sub_if_data *sdata, char *buf, \
47 int buflen) \
48{ \
49 return scnprintf(buf, buflen, format_string, sdata->field); \
50}
51#define IEEE80211_IF_FMT_DEC(name, field) \
52 IEEE80211_IF_FMT(name, field, "%d\n")
53#define IEEE80211_IF_FMT_HEX(name, field) \
54 IEEE80211_IF_FMT(name, field, "%#x\n")
55#define IEEE80211_IF_FMT_SIZE(name, field) \
56 IEEE80211_IF_FMT(name, field, "%zd\n")
57
58#define IEEE80211_IF_FMT_ATOMIC(name, field) \
59static ssize_t ieee80211_if_fmt_##name( \
60 const struct ieee80211_sub_if_data *sdata, \
61 char *buf, int buflen) \
62{ \
63 return scnprintf(buf, buflen, "%d\n", atomic_read(&sdata->field));\
64}
65
66#define IEEE80211_IF_FMT_MAC(name, field) \
67static ssize_t ieee80211_if_fmt_##name( \
68 const struct ieee80211_sub_if_data *sdata, char *buf, \
69 int buflen) \
70{ \
71 return scnprintf(buf, buflen, "%pM\n", sdata->field); \
72}
73
74#define __IEEE80211_IF_FILE(name) \
75static ssize_t ieee80211_if_read_##name(struct file *file, \
76 char __user *userbuf, \
77 size_t count, loff_t *ppos) \
78{ \
79 return ieee80211_if_read(file->private_data, \
80 userbuf, count, ppos, \
81 ieee80211_if_fmt_##name); \
82} \
83static const struct file_operations name##_ops = { \
84 .read = ieee80211_if_read_##name, \
85 .open = mac80211_open_file_generic, \
86}
87
88#define IEEE80211_IF_FILE(name, field, format) \
89 IEEE80211_IF_FMT_##format(name, field) \
90 __IEEE80211_IF_FILE(name)
91
92/* common attributes */
93IEEE80211_IF_FILE(drop_unencrypted, drop_unencrypted, DEC);
94IEEE80211_IF_FILE(force_unicast_rateidx, force_unicast_rateidx, DEC);
95IEEE80211_IF_FILE(max_ratectrl_rateidx, max_ratectrl_rateidx, DEC);
96
97/* STA attributes */
98IEEE80211_IF_FILE(state, u.mgd.state, DEC);
99IEEE80211_IF_FILE(bssid, u.mgd.bssid, MAC);
100IEEE80211_IF_FILE(prev_bssid, u.mgd.prev_bssid, MAC);
101IEEE80211_IF_FILE(ssid_len, u.mgd.ssid_len, SIZE);
102IEEE80211_IF_FILE(aid, u.mgd.aid, DEC);
103IEEE80211_IF_FILE(ap_capab, u.mgd.ap_capab, HEX);
104IEEE80211_IF_FILE(capab, u.mgd.capab, HEX);
105IEEE80211_IF_FILE(extra_ie_len, u.mgd.extra_ie_len, SIZE);
106IEEE80211_IF_FILE(auth_tries, u.mgd.auth_tries, DEC);
107IEEE80211_IF_FILE(assoc_tries, u.mgd.assoc_tries, DEC);
108IEEE80211_IF_FILE(auth_algs, u.mgd.auth_algs, HEX);
109IEEE80211_IF_FILE(auth_alg, u.mgd.auth_alg, DEC);
110IEEE80211_IF_FILE(auth_transaction, u.mgd.auth_transaction, DEC);
111
112static ssize_t ieee80211_if_fmt_flags(
113 const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
114{
115 return scnprintf(buf, buflen, "%s%s%s%s%s%s%s\n",
116 sdata->u.mgd.flags & IEEE80211_STA_SSID_SET ? "SSID\n" : "",
117 sdata->u.mgd.flags & IEEE80211_STA_BSSID_SET ? "BSSID\n" : "",
118 sdata->u.mgd.flags & IEEE80211_STA_PREV_BSSID_SET ? "prev BSSID\n" : "",
119 sdata->u.mgd.flags & IEEE80211_STA_AUTHENTICATED ? "AUTH\n" : "",
120 sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED ? "ASSOC\n" : "",
121 sdata->u.mgd.flags & IEEE80211_STA_PROBEREQ_POLL ? "PROBEREQ POLL\n" : "",
122 sdata->vif.bss_conf.use_cts_prot ? "CTS prot\n" : "");
123}
124__IEEE80211_IF_FILE(flags);
125
126/* AP attributes */
127IEEE80211_IF_FILE(num_sta_ps, u.ap.num_sta_ps, ATOMIC);
128IEEE80211_IF_FILE(dtim_count, u.ap.dtim_count, DEC);
129
130static ssize_t ieee80211_if_fmt_num_buffered_multicast(
131 const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
132{
133 return scnprintf(buf, buflen, "%u\n",
134 skb_queue_len(&sdata->u.ap.ps_bc_buf));
135}
136__IEEE80211_IF_FILE(num_buffered_multicast);
137
138/* WDS attributes */
139IEEE80211_IF_FILE(peer, u.wds.remote_addr, MAC);
140
141#ifdef CONFIG_MAC80211_MESH
142/* Mesh stats attributes */
143IEEE80211_IF_FILE(fwded_frames, u.mesh.mshstats.fwded_frames, DEC);
144IEEE80211_IF_FILE(dropped_frames_ttl, u.mesh.mshstats.dropped_frames_ttl, DEC);
145IEEE80211_IF_FILE(dropped_frames_no_route,
146 u.mesh.mshstats.dropped_frames_no_route, DEC);
147IEEE80211_IF_FILE(estab_plinks, u.mesh.mshstats.estab_plinks, ATOMIC);
148
149/* Mesh parameters */
150IEEE80211_IF_FILE(dot11MeshMaxRetries,
151 u.mesh.mshcfg.dot11MeshMaxRetries, DEC);
152IEEE80211_IF_FILE(dot11MeshRetryTimeout,
153 u.mesh.mshcfg.dot11MeshRetryTimeout, DEC);
154IEEE80211_IF_FILE(dot11MeshConfirmTimeout,
155 u.mesh.mshcfg.dot11MeshConfirmTimeout, DEC);
156IEEE80211_IF_FILE(dot11MeshHoldingTimeout,
157 u.mesh.mshcfg.dot11MeshHoldingTimeout, DEC);
158IEEE80211_IF_FILE(dot11MeshTTL, u.mesh.mshcfg.dot11MeshTTL, DEC);
159IEEE80211_IF_FILE(auto_open_plinks, u.mesh.mshcfg.auto_open_plinks, DEC);
160IEEE80211_IF_FILE(dot11MeshMaxPeerLinks,
161 u.mesh.mshcfg.dot11MeshMaxPeerLinks, DEC);
162IEEE80211_IF_FILE(dot11MeshHWMPactivePathTimeout,
163 u.mesh.mshcfg.dot11MeshHWMPactivePathTimeout, DEC);
164IEEE80211_IF_FILE(dot11MeshHWMPpreqMinInterval,
165 u.mesh.mshcfg.dot11MeshHWMPpreqMinInterval, DEC);
166IEEE80211_IF_FILE(dot11MeshHWMPnetDiameterTraversalTime,
167 u.mesh.mshcfg.dot11MeshHWMPnetDiameterTraversalTime, DEC);
168IEEE80211_IF_FILE(dot11MeshHWMPmaxPREQretries,
169 u.mesh.mshcfg.dot11MeshHWMPmaxPREQretries, DEC);
170IEEE80211_IF_FILE(path_refresh_time,
171 u.mesh.mshcfg.path_refresh_time, DEC);
172IEEE80211_IF_FILE(min_discovery_timeout,
173 u.mesh.mshcfg.min_discovery_timeout, DEC);
174#endif
175
176
177#define DEBUGFS_ADD(name, type)\
178 sdata->debugfs.type.name = debugfs_create_file(#name, 0400,\
179 sdata->debugfsdir, sdata, &name##_ops);
180
181static void add_sta_files(struct ieee80211_sub_if_data *sdata)
182{
183 DEBUGFS_ADD(drop_unencrypted, sta);
184 DEBUGFS_ADD(force_unicast_rateidx, sta);
185 DEBUGFS_ADD(max_ratectrl_rateidx, sta);
186
187 DEBUGFS_ADD(state, sta);
188 DEBUGFS_ADD(bssid, sta);
189 DEBUGFS_ADD(prev_bssid, sta);
190 DEBUGFS_ADD(ssid_len, sta);
191 DEBUGFS_ADD(aid, sta);
192 DEBUGFS_ADD(ap_capab, sta);
193 DEBUGFS_ADD(capab, sta);
194 DEBUGFS_ADD(extra_ie_len, sta);
195 DEBUGFS_ADD(auth_tries, sta);
196 DEBUGFS_ADD(assoc_tries, sta);
197 DEBUGFS_ADD(auth_algs, sta);
198 DEBUGFS_ADD(auth_alg, sta);
199 DEBUGFS_ADD(auth_transaction, sta);
200 DEBUGFS_ADD(flags, sta);
201}
202
203static void add_ap_files(struct ieee80211_sub_if_data *sdata)
204{
205 DEBUGFS_ADD(drop_unencrypted, ap);
206 DEBUGFS_ADD(force_unicast_rateidx, ap);
207 DEBUGFS_ADD(max_ratectrl_rateidx, ap);
208
209 DEBUGFS_ADD(num_sta_ps, ap);
210 DEBUGFS_ADD(dtim_count, ap);
211 DEBUGFS_ADD(num_buffered_multicast, ap);
212}
213
214static void add_wds_files(struct ieee80211_sub_if_data *sdata)
215{
216 DEBUGFS_ADD(drop_unencrypted, wds);
217 DEBUGFS_ADD(force_unicast_rateidx, wds);
218 DEBUGFS_ADD(max_ratectrl_rateidx, wds);
219
220 DEBUGFS_ADD(peer, wds);
221}
222
223static void add_vlan_files(struct ieee80211_sub_if_data *sdata)
224{
225 DEBUGFS_ADD(drop_unencrypted, vlan);
226 DEBUGFS_ADD(force_unicast_rateidx, vlan);
227 DEBUGFS_ADD(max_ratectrl_rateidx, vlan);
228}
229
230static void add_monitor_files(struct ieee80211_sub_if_data *sdata)
231{
232}
233
234#ifdef CONFIG_MAC80211_MESH
235#define MESHSTATS_ADD(name)\
236 sdata->mesh_stats.name = debugfs_create_file(#name, 0400,\
237 sdata->mesh_stats_dir, sdata, &name##_ops);
238
239static void add_mesh_stats(struct ieee80211_sub_if_data *sdata)
240{
241 sdata->mesh_stats_dir = debugfs_create_dir("mesh_stats",
242 sdata->debugfsdir);
243 MESHSTATS_ADD(fwded_frames);
244 MESHSTATS_ADD(dropped_frames_ttl);
245 MESHSTATS_ADD(dropped_frames_no_route);
246 MESHSTATS_ADD(estab_plinks);
247}
248
249#define MESHPARAMS_ADD(name)\
250 sdata->mesh_config.name = debugfs_create_file(#name, 0600,\
251 sdata->mesh_config_dir, sdata, &name##_ops);
252
253static void add_mesh_config(struct ieee80211_sub_if_data *sdata)
254{
255 sdata->mesh_config_dir = debugfs_create_dir("mesh_config",
256 sdata->debugfsdir);
257 MESHPARAMS_ADD(dot11MeshMaxRetries);
258 MESHPARAMS_ADD(dot11MeshRetryTimeout);
259 MESHPARAMS_ADD(dot11MeshConfirmTimeout);
260 MESHPARAMS_ADD(dot11MeshHoldingTimeout);
261 MESHPARAMS_ADD(dot11MeshTTL);
262 MESHPARAMS_ADD(auto_open_plinks);
263 MESHPARAMS_ADD(dot11MeshMaxPeerLinks);
264 MESHPARAMS_ADD(dot11MeshHWMPactivePathTimeout);
265 MESHPARAMS_ADD(dot11MeshHWMPpreqMinInterval);
266 MESHPARAMS_ADD(dot11MeshHWMPnetDiameterTraversalTime);
267 MESHPARAMS_ADD(dot11MeshHWMPmaxPREQretries);
268 MESHPARAMS_ADD(path_refresh_time);
269 MESHPARAMS_ADD(min_discovery_timeout);
270}
271#endif
272
273static void add_files(struct ieee80211_sub_if_data *sdata)
274{
275 if (!sdata->debugfsdir)
276 return;
277
278 switch (sdata->vif.type) {
279 case NL80211_IFTYPE_MESH_POINT:
280#ifdef CONFIG_MAC80211_MESH
281 add_mesh_stats(sdata);
282 add_mesh_config(sdata);
283#endif
284 break;
285 case NL80211_IFTYPE_STATION:
286 add_sta_files(sdata);
287 break;
288 case NL80211_IFTYPE_ADHOC:
289 /* XXX */
290 break;
291 case NL80211_IFTYPE_AP:
292 add_ap_files(sdata);
293 break;
294 case NL80211_IFTYPE_WDS:
295 add_wds_files(sdata);
296 break;
297 case NL80211_IFTYPE_MONITOR:
298 add_monitor_files(sdata);
299 break;
300 case NL80211_IFTYPE_AP_VLAN:
301 add_vlan_files(sdata);
302 break;
303 default:
304 break;
305 }
306}
307
308#define DEBUGFS_DEL(name, type) \
309 do { \
310 debugfs_remove(sdata->debugfs.type.name); \
311 sdata->debugfs.type.name = NULL; \
312 } while (0)
313
314static void del_sta_files(struct ieee80211_sub_if_data *sdata)
315{
316 DEBUGFS_DEL(drop_unencrypted, sta);
317 DEBUGFS_DEL(force_unicast_rateidx, sta);
318 DEBUGFS_DEL(max_ratectrl_rateidx, sta);
319
320 DEBUGFS_DEL(state, sta);
321 DEBUGFS_DEL(bssid, sta);
322 DEBUGFS_DEL(prev_bssid, sta);
323 DEBUGFS_DEL(ssid_len, sta);
324 DEBUGFS_DEL(aid, sta);
325 DEBUGFS_DEL(ap_capab, sta);
326 DEBUGFS_DEL(capab, sta);
327 DEBUGFS_DEL(extra_ie_len, sta);
328 DEBUGFS_DEL(auth_tries, sta);
329 DEBUGFS_DEL(assoc_tries, sta);
330 DEBUGFS_DEL(auth_algs, sta);
331 DEBUGFS_DEL(auth_alg, sta);
332 DEBUGFS_DEL(auth_transaction, sta);
333 DEBUGFS_DEL(flags, sta);
334}
335
336static void del_ap_files(struct ieee80211_sub_if_data *sdata)
337{
338 DEBUGFS_DEL(drop_unencrypted, ap);
339 DEBUGFS_DEL(force_unicast_rateidx, ap);
340 DEBUGFS_DEL(max_ratectrl_rateidx, ap);
341
342 DEBUGFS_DEL(num_sta_ps, ap);
343 DEBUGFS_DEL(dtim_count, ap);
344 DEBUGFS_DEL(num_buffered_multicast, ap);
345}
346
347static void del_wds_files(struct ieee80211_sub_if_data *sdata)
348{
349 DEBUGFS_DEL(drop_unencrypted, wds);
350 DEBUGFS_DEL(force_unicast_rateidx, wds);
351 DEBUGFS_DEL(max_ratectrl_rateidx, wds);
352
353 DEBUGFS_DEL(peer, wds);
354}
355
356static void del_vlan_files(struct ieee80211_sub_if_data *sdata)
357{
358 DEBUGFS_DEL(drop_unencrypted, vlan);
359 DEBUGFS_DEL(force_unicast_rateidx, vlan);
360 DEBUGFS_DEL(max_ratectrl_rateidx, vlan);
361}
362
363static void del_monitor_files(struct ieee80211_sub_if_data *sdata)
364{
365}
366
367#ifdef CONFIG_MAC80211_MESH
368#define MESHSTATS_DEL(name) \
369 do { \
370 debugfs_remove(sdata->mesh_stats.name); \
371 sdata->mesh_stats.name = NULL; \
372 } while (0)
373
374static void del_mesh_stats(struct ieee80211_sub_if_data *sdata)
375{
376 MESHSTATS_DEL(fwded_frames);
377 MESHSTATS_DEL(dropped_frames_ttl);
378 MESHSTATS_DEL(dropped_frames_no_route);
379 MESHSTATS_DEL(estab_plinks);
380 debugfs_remove(sdata->mesh_stats_dir);
381 sdata->mesh_stats_dir = NULL;
382}
383
384#define MESHPARAMS_DEL(name) \
385 do { \
386 debugfs_remove(sdata->mesh_config.name); \
387 sdata->mesh_config.name = NULL; \
388 } while (0)
389
390static void del_mesh_config(struct ieee80211_sub_if_data *sdata)
391{
392 MESHPARAMS_DEL(dot11MeshMaxRetries);
393 MESHPARAMS_DEL(dot11MeshRetryTimeout);
394 MESHPARAMS_DEL(dot11MeshConfirmTimeout);
395 MESHPARAMS_DEL(dot11MeshHoldingTimeout);
396 MESHPARAMS_DEL(dot11MeshTTL);
397 MESHPARAMS_DEL(auto_open_plinks);
398 MESHPARAMS_DEL(dot11MeshMaxPeerLinks);
399 MESHPARAMS_DEL(dot11MeshHWMPactivePathTimeout);
400 MESHPARAMS_DEL(dot11MeshHWMPpreqMinInterval);
401 MESHPARAMS_DEL(dot11MeshHWMPnetDiameterTraversalTime);
402 MESHPARAMS_DEL(dot11MeshHWMPmaxPREQretries);
403 MESHPARAMS_DEL(path_refresh_time);
404 MESHPARAMS_DEL(min_discovery_timeout);
405 debugfs_remove(sdata->mesh_config_dir);
406 sdata->mesh_config_dir = NULL;
407}
408#endif
409
410static void del_files(struct ieee80211_sub_if_data *sdata)
411{
412 if (!sdata->debugfsdir)
413 return;
414
415 switch (sdata->vif.type) {
416 case NL80211_IFTYPE_MESH_POINT:
417#ifdef CONFIG_MAC80211_MESH
418 del_mesh_stats(sdata);
419 del_mesh_config(sdata);
420#endif
421 break;
422 case NL80211_IFTYPE_STATION:
423 del_sta_files(sdata);
424 break;
425 case NL80211_IFTYPE_ADHOC:
426 /* XXX */
427 break;
428 case NL80211_IFTYPE_AP:
429 del_ap_files(sdata);
430 break;
431 case NL80211_IFTYPE_WDS:
432 del_wds_files(sdata);
433 break;
434 case NL80211_IFTYPE_MONITOR:
435 del_monitor_files(sdata);
436 break;
437 case NL80211_IFTYPE_AP_VLAN:
438 del_vlan_files(sdata);
439 break;
440 default:
441 break;
442 }
443}
444
445static int notif_registered;
446
447void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata)
448{
449 char buf[10+IFNAMSIZ];
450
451 if (!notif_registered)
452 return;
453
454 sprintf(buf, "netdev:%s", sdata->dev->name);
455 sdata->debugfsdir = debugfs_create_dir(buf,
456 sdata->local->hw.wiphy->debugfsdir);
457 add_files(sdata);
458}
459
460void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata)
461{
462 del_files(sdata);
463 debugfs_remove(sdata->debugfsdir);
464 sdata->debugfsdir = NULL;
465}
466
467static int netdev_notify(struct notifier_block *nb,
468 unsigned long state,
469 void *ndev)
470{
471 struct net_device *dev = ndev;
472 struct dentry *dir;
473 struct ieee80211_sub_if_data *sdata;
474 char buf[10+IFNAMSIZ];
475
476 if (state != NETDEV_CHANGENAME)
477 return 0;
478
479 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
480 return 0;
481
482 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
483 return 0;
484
485 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
486
487 dir = sdata->debugfsdir;
488
489 if (!dir)
490 return 0;
491
492 sprintf(buf, "netdev:%s", dev->name);
493 if (!debugfs_rename(dir->d_parent, dir, dir->d_parent, buf))
494 printk(KERN_ERR "mac80211: debugfs: failed to rename debugfs "
495 "dir to %s\n", buf);
496
497 return 0;
498}
499
500static struct notifier_block mac80211_debugfs_netdev_notifier = {
501 .notifier_call = netdev_notify,
502};
503
504void ieee80211_debugfs_netdev_init(void)
505{
506 int err;
507
508 err = register_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
509 if (err) {
510 printk(KERN_ERR
511 "mac80211: failed to install netdev notifier,"
512 " disabling per-netdev debugfs!\n");
513 } else
514 notif_registered = 1;
515}
516
517void ieee80211_debugfs_netdev_exit(void)
518{
519 unregister_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
520 notif_registered = 0;
521}