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(bssid, u.mgd.bssid, MAC);
99IEEE80211_IF_FILE(aid, u.mgd.aid, DEC);
100IEEE80211_IF_FILE(capab, u.mgd.capab, HEX);
101
102/* AP attributes */
103IEEE80211_IF_FILE(num_sta_ps, u.ap.num_sta_ps, ATOMIC);
104IEEE80211_IF_FILE(dtim_count, u.ap.dtim_count, DEC);
105
106static ssize_t ieee80211_if_fmt_num_buffered_multicast(
107 const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
108{
109 return scnprintf(buf, buflen, "%u\n",
110 skb_queue_len(&sdata->u.ap.ps_bc_buf));
111}
112__IEEE80211_IF_FILE(num_buffered_multicast);
113
114/* WDS attributes */
115IEEE80211_IF_FILE(peer, u.wds.remote_addr, MAC);
116
117#ifdef CONFIG_MAC80211_MESH
118/* Mesh stats attributes */
119IEEE80211_IF_FILE(fwded_mcast, u.mesh.mshstats.fwded_mcast, DEC);
120IEEE80211_IF_FILE(fwded_unicast, u.mesh.mshstats.fwded_unicast, DEC);
121IEEE80211_IF_FILE(fwded_frames, u.mesh.mshstats.fwded_frames, DEC);
122IEEE80211_IF_FILE(dropped_frames_ttl, u.mesh.mshstats.dropped_frames_ttl, DEC);
123IEEE80211_IF_FILE(dropped_frames_no_route,
124 u.mesh.mshstats.dropped_frames_no_route, DEC);
125IEEE80211_IF_FILE(estab_plinks, u.mesh.mshstats.estab_plinks, ATOMIC);
126
127/* Mesh parameters */
128IEEE80211_IF_FILE(dot11MeshMaxRetries,
129 u.mesh.mshcfg.dot11MeshMaxRetries, DEC);
130IEEE80211_IF_FILE(dot11MeshRetryTimeout,
131 u.mesh.mshcfg.dot11MeshRetryTimeout, DEC);
132IEEE80211_IF_FILE(dot11MeshConfirmTimeout,
133 u.mesh.mshcfg.dot11MeshConfirmTimeout, DEC);
134IEEE80211_IF_FILE(dot11MeshHoldingTimeout,
135 u.mesh.mshcfg.dot11MeshHoldingTimeout, DEC);
136IEEE80211_IF_FILE(dot11MeshTTL, u.mesh.mshcfg.dot11MeshTTL, DEC);
137IEEE80211_IF_FILE(auto_open_plinks, u.mesh.mshcfg.auto_open_plinks, DEC);
138IEEE80211_IF_FILE(dot11MeshMaxPeerLinks,
139 u.mesh.mshcfg.dot11MeshMaxPeerLinks, DEC);
140IEEE80211_IF_FILE(dot11MeshHWMPactivePathTimeout,
141 u.mesh.mshcfg.dot11MeshHWMPactivePathTimeout, DEC);
142IEEE80211_IF_FILE(dot11MeshHWMPpreqMinInterval,
143 u.mesh.mshcfg.dot11MeshHWMPpreqMinInterval, DEC);
144IEEE80211_IF_FILE(dot11MeshHWMPnetDiameterTraversalTime,
145 u.mesh.mshcfg.dot11MeshHWMPnetDiameterTraversalTime, DEC);
146IEEE80211_IF_FILE(dot11MeshHWMPmaxPREQretries,
147 u.mesh.mshcfg.dot11MeshHWMPmaxPREQretries, DEC);
148IEEE80211_IF_FILE(path_refresh_time,
149 u.mesh.mshcfg.path_refresh_time, DEC);
150IEEE80211_IF_FILE(min_discovery_timeout,
151 u.mesh.mshcfg.min_discovery_timeout, DEC);
152#endif
153
154
155#define DEBUGFS_ADD(name, type)\
156 sdata->debugfs.type.name = debugfs_create_file(#name, 0400,\
157 sdata->debugfsdir, sdata, &name##_ops);
158
159static void add_sta_files(struct ieee80211_sub_if_data *sdata)
160{
161 DEBUGFS_ADD(drop_unencrypted, sta);
162 DEBUGFS_ADD(force_unicast_rateidx, sta);
163 DEBUGFS_ADD(max_ratectrl_rateidx, sta);
164
165 DEBUGFS_ADD(bssid, sta);
166 DEBUGFS_ADD(aid, sta);
167 DEBUGFS_ADD(capab, sta);
168}
169
170static void add_ap_files(struct ieee80211_sub_if_data *sdata)
171{
172 DEBUGFS_ADD(drop_unencrypted, ap);
173 DEBUGFS_ADD(force_unicast_rateidx, ap);
174 DEBUGFS_ADD(max_ratectrl_rateidx, ap);
175
176 DEBUGFS_ADD(num_sta_ps, ap);
177 DEBUGFS_ADD(dtim_count, ap);
178 DEBUGFS_ADD(num_buffered_multicast, ap);
179}
180
181static void add_wds_files(struct ieee80211_sub_if_data *sdata)
182{
183 DEBUGFS_ADD(drop_unencrypted, wds);
184 DEBUGFS_ADD(force_unicast_rateidx, wds);
185 DEBUGFS_ADD(max_ratectrl_rateidx, wds);
186
187 DEBUGFS_ADD(peer, wds);
188}
189
190static void add_vlan_files(struct ieee80211_sub_if_data *sdata)
191{
192 DEBUGFS_ADD(drop_unencrypted, vlan);
193 DEBUGFS_ADD(force_unicast_rateidx, vlan);
194 DEBUGFS_ADD(max_ratectrl_rateidx, vlan);
195}
196
197static void add_monitor_files(struct ieee80211_sub_if_data *sdata)
198{
199}
200
201#ifdef CONFIG_MAC80211_MESH
202#define MESHSTATS_ADD(name)\
203 sdata->mesh_stats.name = debugfs_create_file(#name, 0400,\
204 sdata->mesh_stats_dir, sdata, &name##_ops);
205
206static void add_mesh_stats(struct ieee80211_sub_if_data *sdata)
207{
208 sdata->mesh_stats_dir = debugfs_create_dir("mesh_stats",
209 sdata->debugfsdir);
210 MESHSTATS_ADD(fwded_mcast);
211 MESHSTATS_ADD(fwded_unicast);
212 MESHSTATS_ADD(fwded_frames);
213 MESHSTATS_ADD(dropped_frames_ttl);
214 MESHSTATS_ADD(dropped_frames_no_route);
215 MESHSTATS_ADD(estab_plinks);
216}
217
218#define MESHPARAMS_ADD(name)\
219 sdata->mesh_config.name = debugfs_create_file(#name, 0600,\
220 sdata->mesh_config_dir, sdata, &name##_ops);
221
222static void add_mesh_config(struct ieee80211_sub_if_data *sdata)
223{
224 sdata->mesh_config_dir = debugfs_create_dir("mesh_config",
225 sdata->debugfsdir);
226 MESHPARAMS_ADD(dot11MeshMaxRetries);
227 MESHPARAMS_ADD(dot11MeshRetryTimeout);
228 MESHPARAMS_ADD(dot11MeshConfirmTimeout);
229 MESHPARAMS_ADD(dot11MeshHoldingTimeout);
230 MESHPARAMS_ADD(dot11MeshTTL);
231 MESHPARAMS_ADD(auto_open_plinks);
232 MESHPARAMS_ADD(dot11MeshMaxPeerLinks);
233 MESHPARAMS_ADD(dot11MeshHWMPactivePathTimeout);
234 MESHPARAMS_ADD(dot11MeshHWMPpreqMinInterval);
235 MESHPARAMS_ADD(dot11MeshHWMPnetDiameterTraversalTime);
236 MESHPARAMS_ADD(dot11MeshHWMPmaxPREQretries);
237 MESHPARAMS_ADD(path_refresh_time);
238 MESHPARAMS_ADD(min_discovery_timeout);
239}
240#endif
241
242static void add_files(struct ieee80211_sub_if_data *sdata)
243{
244 if (!sdata->debugfsdir)
245 return;
246
247 switch (sdata->vif.type) {
248 case NL80211_IFTYPE_MESH_POINT:
249#ifdef CONFIG_MAC80211_MESH
250 add_mesh_stats(sdata);
251 add_mesh_config(sdata);
252#endif
253 break;
254 case NL80211_IFTYPE_STATION:
255 add_sta_files(sdata);
256 break;
257 case NL80211_IFTYPE_ADHOC:
258 /* XXX */
259 break;
260 case NL80211_IFTYPE_AP:
261 add_ap_files(sdata);
262 break;
263 case NL80211_IFTYPE_WDS:
264 add_wds_files(sdata);
265 break;
266 case NL80211_IFTYPE_MONITOR:
267 add_monitor_files(sdata);
268 break;
269 case NL80211_IFTYPE_AP_VLAN:
270 add_vlan_files(sdata);
271 break;
272 default:
273 break;
274 }
275}
276
277#define DEBUGFS_DEL(name, type) \
278 do { \
279 debugfs_remove(sdata->debugfs.type.name); \
280 sdata->debugfs.type.name = NULL; \
281 } while (0)
282
283static void del_sta_files(struct ieee80211_sub_if_data *sdata)
284{
285 DEBUGFS_DEL(drop_unencrypted, sta);
286 DEBUGFS_DEL(force_unicast_rateidx, sta);
287 DEBUGFS_DEL(max_ratectrl_rateidx, sta);
288
289 DEBUGFS_DEL(bssid, sta);
290 DEBUGFS_DEL(aid, sta);
291 DEBUGFS_DEL(capab, sta);
292}
293
294static void del_ap_files(struct ieee80211_sub_if_data *sdata)
295{
296 DEBUGFS_DEL(drop_unencrypted, ap);
297 DEBUGFS_DEL(force_unicast_rateidx, ap);
298 DEBUGFS_DEL(max_ratectrl_rateidx, ap);
299
300 DEBUGFS_DEL(num_sta_ps, ap);
301 DEBUGFS_DEL(dtim_count, ap);
302 DEBUGFS_DEL(num_buffered_multicast, ap);
303}
304
305static void del_wds_files(struct ieee80211_sub_if_data *sdata)
306{
307 DEBUGFS_DEL(drop_unencrypted, wds);
308 DEBUGFS_DEL(force_unicast_rateidx, wds);
309 DEBUGFS_DEL(max_ratectrl_rateidx, wds);
310
311 DEBUGFS_DEL(peer, wds);
312}
313
314static void del_vlan_files(struct ieee80211_sub_if_data *sdata)
315{
316 DEBUGFS_DEL(drop_unencrypted, vlan);
317 DEBUGFS_DEL(force_unicast_rateidx, vlan);
318 DEBUGFS_DEL(max_ratectrl_rateidx, vlan);
319}
320
321static void del_monitor_files(struct ieee80211_sub_if_data *sdata)
322{
323}
324
325#ifdef CONFIG_MAC80211_MESH
326#define MESHSTATS_DEL(name) \
327 do { \
328 debugfs_remove(sdata->mesh_stats.name); \
329 sdata->mesh_stats.name = NULL; \
330 } while (0)
331
332static void del_mesh_stats(struct ieee80211_sub_if_data *sdata)
333{
334 MESHSTATS_DEL(fwded_mcast);
335 MESHSTATS_DEL(fwded_unicast);
336 MESHSTATS_DEL(fwded_frames);
337 MESHSTATS_DEL(dropped_frames_ttl);
338 MESHSTATS_DEL(dropped_frames_no_route);
339 MESHSTATS_DEL(estab_plinks);
340 debugfs_remove(sdata->mesh_stats_dir);
341 sdata->mesh_stats_dir = NULL;
342}
343
344#define MESHPARAMS_DEL(name) \
345 do { \
346 debugfs_remove(sdata->mesh_config.name); \
347 sdata->mesh_config.name = NULL; \
348 } while (0)
349
350static void del_mesh_config(struct ieee80211_sub_if_data *sdata)
351{
352 MESHPARAMS_DEL(dot11MeshMaxRetries);
353 MESHPARAMS_DEL(dot11MeshRetryTimeout);
354 MESHPARAMS_DEL(dot11MeshConfirmTimeout);
355 MESHPARAMS_DEL(dot11MeshHoldingTimeout);
356 MESHPARAMS_DEL(dot11MeshTTL);
357 MESHPARAMS_DEL(auto_open_plinks);
358 MESHPARAMS_DEL(dot11MeshMaxPeerLinks);
359 MESHPARAMS_DEL(dot11MeshHWMPactivePathTimeout);
360 MESHPARAMS_DEL(dot11MeshHWMPpreqMinInterval);
361 MESHPARAMS_DEL(dot11MeshHWMPnetDiameterTraversalTime);
362 MESHPARAMS_DEL(dot11MeshHWMPmaxPREQretries);
363 MESHPARAMS_DEL(path_refresh_time);
364 MESHPARAMS_DEL(min_discovery_timeout);
365 debugfs_remove(sdata->mesh_config_dir);
366 sdata->mesh_config_dir = NULL;
367}
368#endif
369
370static void del_files(struct ieee80211_sub_if_data *sdata)
371{
372 if (!sdata->debugfsdir)
373 return;
374
375 switch (sdata->vif.type) {
376 case NL80211_IFTYPE_MESH_POINT:
377#ifdef CONFIG_MAC80211_MESH
378 del_mesh_stats(sdata);
379 del_mesh_config(sdata);
380#endif
381 break;
382 case NL80211_IFTYPE_STATION:
383 del_sta_files(sdata);
384 break;
385 case NL80211_IFTYPE_ADHOC:
386 /* XXX */
387 break;
388 case NL80211_IFTYPE_AP:
389 del_ap_files(sdata);
390 break;
391 case NL80211_IFTYPE_WDS:
392 del_wds_files(sdata);
393 break;
394 case NL80211_IFTYPE_MONITOR:
395 del_monitor_files(sdata);
396 break;
397 case NL80211_IFTYPE_AP_VLAN:
398 del_vlan_files(sdata);
399 break;
400 default:
401 break;
402 }
403}
404
405static int notif_registered;
406
407void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata)
408{
409 char buf[10+IFNAMSIZ];
410
411 if (!notif_registered)
412 return;
413
414 sprintf(buf, "netdev:%s", sdata->dev->name);
415 sdata->debugfsdir = debugfs_create_dir(buf,
416 sdata->local->hw.wiphy->debugfsdir);
417 add_files(sdata);
418}
419
420void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata)
421{
422 del_files(sdata);
423 debugfs_remove(sdata->debugfsdir);
424 sdata->debugfsdir = NULL;
425}
426
427static int netdev_notify(struct notifier_block *nb,
428 unsigned long state,
429 void *ndev)
430{
431 struct net_device *dev = ndev;
432 struct dentry *dir;
433 struct ieee80211_sub_if_data *sdata;
434 char buf[10+IFNAMSIZ];
435
436 if (state != NETDEV_CHANGENAME)
437 return 0;
438
439 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
440 return 0;
441
442 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
443 return 0;
444
445 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
446
447 dir = sdata->debugfsdir;
448
449 if (!dir)
450 return 0;
451
452 sprintf(buf, "netdev:%s", dev->name);
453 if (!debugfs_rename(dir->d_parent, dir, dir->d_parent, buf))
454 printk(KERN_ERR "mac80211: debugfs: failed to rename debugfs "
455 "dir to %s\n", buf);
456
457 return 0;
458}
459
460static struct notifier_block mac80211_debugfs_netdev_notifier = {
461 .notifier_call = netdev_notify,
462};
463
464void ieee80211_debugfs_netdev_init(void)
465{
466 int err;
467
468 err = register_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
469 if (err) {
470 printk(KERN_ERR
471 "mac80211: failed to install netdev notifier,"
472 " disabling per-netdev debugfs!\n");
473 } else
474 notif_registered = 1;
475}
476
477void ieee80211_debugfs_netdev_exit(void)
478{
479 unregister_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
480 notif_registered = 0;
481}