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 "ieee80211_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 ret = simple_read_from_buffer(userbuf, count, ppos, buf, ret);
37 }
38 read_unlock(&dev_base_lock);
39 return ret;
40}
41
42#define IEEE80211_IF_FMT(name, field, format_string) \
43static ssize_t ieee80211_if_fmt_##name( \
44 const struct ieee80211_sub_if_data *sdata, char *buf, \
45 int buflen) \
46{ \
47 return scnprintf(buf, buflen, format_string, sdata->field); \
48}
49#define IEEE80211_IF_FMT_DEC(name, field) \
50 IEEE80211_IF_FMT(name, field, "%d\n")
51#define IEEE80211_IF_FMT_HEX(name, field) \
52 IEEE80211_IF_FMT(name, field, "%#x\n")
53#define IEEE80211_IF_FMT_SIZE(name, field) \
54 IEEE80211_IF_FMT(name, field, "%zd\n")
55
56#define IEEE80211_IF_FMT_ATOMIC(name, field) \
57static ssize_t ieee80211_if_fmt_##name( \
58 const struct ieee80211_sub_if_data *sdata, \
59 char *buf, int buflen) \
60{ \
61 return scnprintf(buf, buflen, "%d\n", atomic_read(&sdata->field));\
62}
63
64#define IEEE80211_IF_FMT_MAC(name, field) \
65static ssize_t ieee80211_if_fmt_##name( \
66 const struct ieee80211_sub_if_data *sdata, char *buf, \
67 int buflen) \
68{ \
69 return scnprintf(buf, buflen, MAC_FMT "\n", MAC_ARG(sdata->field));\
70}
71
72#define __IEEE80211_IF_FILE(name) \
73static ssize_t ieee80211_if_read_##name(struct file *file, \
74 char __user *userbuf, \
75 size_t count, loff_t *ppos) \
76{ \
77 return ieee80211_if_read(file->private_data, \
78 userbuf, count, ppos, \
79 ieee80211_if_fmt_##name); \
80} \
81static const struct file_operations name##_ops = { \
82 .read = ieee80211_if_read_##name, \
83 .open = mac80211_open_file_generic, \
84}
85
86#define IEEE80211_IF_FILE(name, field, format) \
87 IEEE80211_IF_FMT_##format(name, field) \
88 __IEEE80211_IF_FILE(name)
89
90/* common attributes */
91IEEE80211_IF_FILE(channel_use, channel_use, DEC);
92IEEE80211_IF_FILE(drop_unencrypted, drop_unencrypted, DEC);
93IEEE80211_IF_FILE(eapol, eapol, DEC);
94IEEE80211_IF_FILE(ieee8021_x, ieee802_1x, DEC);
95
96/* STA/IBSS attributes */
97IEEE80211_IF_FILE(state, u.sta.state, DEC);
98IEEE80211_IF_FILE(bssid, u.sta.bssid, MAC);
99IEEE80211_IF_FILE(prev_bssid, u.sta.prev_bssid, MAC);
100IEEE80211_IF_FILE(ssid_len, u.sta.ssid_len, SIZE);
101IEEE80211_IF_FILE(aid, u.sta.aid, DEC);
102IEEE80211_IF_FILE(ap_capab, u.sta.ap_capab, HEX);
103IEEE80211_IF_FILE(capab, u.sta.capab, HEX);
104IEEE80211_IF_FILE(extra_ie_len, u.sta.extra_ie_len, SIZE);
105IEEE80211_IF_FILE(auth_tries, u.sta.auth_tries, DEC);
106IEEE80211_IF_FILE(assoc_tries, u.sta.assoc_tries, DEC);
107IEEE80211_IF_FILE(auth_algs, u.sta.auth_algs, HEX);
108IEEE80211_IF_FILE(auth_alg, u.sta.auth_alg, DEC);
109IEEE80211_IF_FILE(auth_transaction, u.sta.auth_transaction, DEC);
110
111static ssize_t ieee80211_if_fmt_flags(
112 const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
113{
114 return scnprintf(buf, buflen, "%s%s%s%s%s%s%s\n",
115 sdata->u.sta.ssid_set ? "SSID\n" : "",
116 sdata->u.sta.bssid_set ? "BSSID\n" : "",
117 sdata->u.sta.prev_bssid_set ? "prev BSSID\n" : "",
118 sdata->u.sta.authenticated ? "AUTH\n" : "",
119 sdata->u.sta.associated ? "ASSOC\n" : "",
120 sdata->u.sta.probereq_poll ? "PROBEREQ POLL\n" : "",
121 sdata->use_protection ? "CTS prot\n" : "");
122}
123__IEEE80211_IF_FILE(flags);
124
125/* AP attributes */
126IEEE80211_IF_FILE(num_sta_ps, u.ap.num_sta_ps, ATOMIC);
127IEEE80211_IF_FILE(dtim_period, u.ap.dtim_period, DEC);
128IEEE80211_IF_FILE(dtim_count, u.ap.dtim_count, DEC);
129IEEE80211_IF_FILE(num_beacons, u.ap.num_beacons, DEC);
130IEEE80211_IF_FILE(force_unicast_rateidx, u.ap.force_unicast_rateidx, DEC);
131IEEE80211_IF_FILE(max_ratectrl_rateidx, u.ap.max_ratectrl_rateidx, DEC);
132
133static ssize_t ieee80211_if_fmt_num_buffered_multicast(
134 const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
135{
136 return scnprintf(buf, buflen, "%u\n",
137 skb_queue_len(&sdata->u.ap.ps_bc_buf));
138}
139__IEEE80211_IF_FILE(num_buffered_multicast);
140
141static ssize_t ieee80211_if_fmt_beacon_head_len(
142 const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
143{
144 if (sdata->u.ap.beacon_head)
145 return scnprintf(buf, buflen, "%d\n",
146 sdata->u.ap.beacon_head_len);
147 return scnprintf(buf, buflen, "\n");
148}
149__IEEE80211_IF_FILE(beacon_head_len);
150
151static ssize_t ieee80211_if_fmt_beacon_tail_len(
152 const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
153{
154 if (sdata->u.ap.beacon_tail)
155 return scnprintf(buf, buflen, "%d\n",
156 sdata->u.ap.beacon_tail_len);
157 return scnprintf(buf, buflen, "\n");
158}
159__IEEE80211_IF_FILE(beacon_tail_len);
160
161/* WDS attributes */
162IEEE80211_IF_FILE(peer, u.wds.remote_addr, MAC);
163
164/* VLAN attributes */
165IEEE80211_IF_FILE(vlan_id, u.vlan.id, DEC);
166
167/* MONITOR attributes */
168static ssize_t ieee80211_if_fmt_mode(
169 const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
170{
171 struct ieee80211_local *local = sdata->local;
172
173 return scnprintf(buf, buflen, "%s\n",
174 ((local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER) ||
175 local->open_count == local->monitors) ?
176 "hard" : "soft");
177}
178__IEEE80211_IF_FILE(mode);
179
180
181#define DEBUGFS_ADD(name, type)\
182 sdata->debugfs.type.name = debugfs_create_file(#name, 0444,\
183 sdata->debugfsdir, sdata, &name##_ops);
184
185static void add_sta_files(struct ieee80211_sub_if_data *sdata)
186{
187 DEBUGFS_ADD(channel_use, sta);
188 DEBUGFS_ADD(drop_unencrypted, sta);
189 DEBUGFS_ADD(eapol, sta);
190 DEBUGFS_ADD(ieee8021_x, sta);
191 DEBUGFS_ADD(state, sta);
192 DEBUGFS_ADD(bssid, sta);
193 DEBUGFS_ADD(prev_bssid, sta);
194 DEBUGFS_ADD(ssid_len, sta);
195 DEBUGFS_ADD(aid, sta);
196 DEBUGFS_ADD(ap_capab, sta);
197 DEBUGFS_ADD(capab, sta);
198 DEBUGFS_ADD(extra_ie_len, sta);
199 DEBUGFS_ADD(auth_tries, sta);
200 DEBUGFS_ADD(assoc_tries, sta);
201 DEBUGFS_ADD(auth_algs, sta);
202 DEBUGFS_ADD(auth_alg, sta);
203 DEBUGFS_ADD(auth_transaction, sta);
204 DEBUGFS_ADD(flags, sta);
205}
206
207static void add_ap_files(struct ieee80211_sub_if_data *sdata)
208{
209 DEBUGFS_ADD(channel_use, ap);
210 DEBUGFS_ADD(drop_unencrypted, ap);
211 DEBUGFS_ADD(eapol, ap);
212 DEBUGFS_ADD(ieee8021_x, ap);
213 DEBUGFS_ADD(num_sta_ps, ap);
214 DEBUGFS_ADD(dtim_period, ap);
215 DEBUGFS_ADD(dtim_count, ap);
216 DEBUGFS_ADD(num_beacons, ap);
217 DEBUGFS_ADD(force_unicast_rateidx, ap);
218 DEBUGFS_ADD(max_ratectrl_rateidx, ap);
219 DEBUGFS_ADD(num_buffered_multicast, ap);
220 DEBUGFS_ADD(beacon_head_len, ap);
221 DEBUGFS_ADD(beacon_tail_len, ap);
222}
223
224static void add_wds_files(struct ieee80211_sub_if_data *sdata)
225{
226 DEBUGFS_ADD(channel_use, wds);
227 DEBUGFS_ADD(drop_unencrypted, wds);
228 DEBUGFS_ADD(eapol, wds);
229 DEBUGFS_ADD(ieee8021_x, wds);
230 DEBUGFS_ADD(peer, wds);
231}
232
233static void add_vlan_files(struct ieee80211_sub_if_data *sdata)
234{
235 DEBUGFS_ADD(channel_use, vlan);
236 DEBUGFS_ADD(drop_unencrypted, vlan);
237 DEBUGFS_ADD(eapol, vlan);
238 DEBUGFS_ADD(ieee8021_x, vlan);
239 DEBUGFS_ADD(vlan_id, vlan);
240}
241
242static void add_monitor_files(struct ieee80211_sub_if_data *sdata)
243{
244 DEBUGFS_ADD(mode, monitor);
245}
246
247static void add_files(struct ieee80211_sub_if_data *sdata)
248{
249 if (!sdata->debugfsdir)
250 return;
251
252 switch (sdata->type) {
253 case IEEE80211_IF_TYPE_STA:
254 case IEEE80211_IF_TYPE_IBSS:
255 add_sta_files(sdata);
256 break;
257 case IEEE80211_IF_TYPE_AP:
258 add_ap_files(sdata);
259 break;
260 case IEEE80211_IF_TYPE_WDS:
261 add_wds_files(sdata);
262 break;
263 case IEEE80211_IF_TYPE_MNTR:
264 add_monitor_files(sdata);
265 break;
266 case IEEE80211_IF_TYPE_VLAN:
267 add_vlan_files(sdata);
268 break;
269 default:
270 break;
271 }
272}
273
274#define DEBUGFS_DEL(name, type) \
275 do { \
276 debugfs_remove(sdata->debugfs.type.name); \
277 sdata->debugfs.type.name = NULL; \
278 } while (0)
279
280static void del_sta_files(struct ieee80211_sub_if_data *sdata)
281{
282 DEBUGFS_DEL(channel_use, sta);
283 DEBUGFS_DEL(drop_unencrypted, sta);
284 DEBUGFS_DEL(eapol, sta);
285 DEBUGFS_DEL(ieee8021_x, sta);
286 DEBUGFS_DEL(state, sta);
287 DEBUGFS_DEL(bssid, sta);
288 DEBUGFS_DEL(prev_bssid, sta);
289 DEBUGFS_DEL(ssid_len, sta);
290 DEBUGFS_DEL(aid, sta);
291 DEBUGFS_DEL(ap_capab, sta);
292 DEBUGFS_DEL(capab, sta);
293 DEBUGFS_DEL(extra_ie_len, sta);
294 DEBUGFS_DEL(auth_tries, sta);
295 DEBUGFS_DEL(assoc_tries, sta);
296 DEBUGFS_DEL(auth_algs, sta);
297 DEBUGFS_DEL(auth_alg, sta);
298 DEBUGFS_DEL(auth_transaction, sta);
299 DEBUGFS_DEL(flags, sta);
300}
301
302static void del_ap_files(struct ieee80211_sub_if_data *sdata)
303{
304 DEBUGFS_DEL(channel_use, ap);
305 DEBUGFS_DEL(drop_unencrypted, ap);
306 DEBUGFS_DEL(eapol, ap);
307 DEBUGFS_DEL(ieee8021_x, ap);
308 DEBUGFS_DEL(num_sta_ps, ap);
309 DEBUGFS_DEL(dtim_period, ap);
310 DEBUGFS_DEL(dtim_count, ap);
311 DEBUGFS_DEL(num_beacons, ap);
312 DEBUGFS_DEL(force_unicast_rateidx, ap);
313 DEBUGFS_DEL(max_ratectrl_rateidx, ap);
314 DEBUGFS_DEL(num_buffered_multicast, ap);
315 DEBUGFS_DEL(beacon_head_len, ap);
316 DEBUGFS_DEL(beacon_tail_len, ap);
317}
318
319static void del_wds_files(struct ieee80211_sub_if_data *sdata)
320{
321 DEBUGFS_DEL(channel_use, wds);
322 DEBUGFS_DEL(drop_unencrypted, wds);
323 DEBUGFS_DEL(eapol, wds);
324 DEBUGFS_DEL(ieee8021_x, wds);
325 DEBUGFS_DEL(peer, wds);
326}
327
328static void del_vlan_files(struct ieee80211_sub_if_data *sdata)
329{
330 DEBUGFS_DEL(channel_use, vlan);
331 DEBUGFS_DEL(drop_unencrypted, vlan);
332 DEBUGFS_DEL(eapol, vlan);
333 DEBUGFS_DEL(ieee8021_x, vlan);
334 DEBUGFS_DEL(vlan_id, vlan);
335}
336
337static void del_monitor_files(struct ieee80211_sub_if_data *sdata)
338{
339 DEBUGFS_DEL(mode, monitor);
340}
341
342static void del_files(struct ieee80211_sub_if_data *sdata, int type)
343{
344 if (!sdata->debugfsdir)
345 return;
346
347 switch (type) {
348 case IEEE80211_IF_TYPE_STA:
349 case IEEE80211_IF_TYPE_IBSS:
350 del_sta_files(sdata);
351 break;
352 case IEEE80211_IF_TYPE_AP:
353 del_ap_files(sdata);
354 break;
355 case IEEE80211_IF_TYPE_WDS:
356 del_wds_files(sdata);
357 break;
358 case IEEE80211_IF_TYPE_MNTR:
359 del_monitor_files(sdata);
360 break;
361 case IEEE80211_IF_TYPE_VLAN:
362 del_vlan_files(sdata);
363 break;
364 default:
365 break;
366 }
367}
368
369static int notif_registered;
370
371void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata)
372{
373 char buf[10+IFNAMSIZ];
374
375 if (!notif_registered)
376 return;
377
378 sprintf(buf, "netdev:%s", sdata->dev->name);
379 sdata->debugfsdir = debugfs_create_dir(buf,
380 sdata->local->hw.wiphy->debugfsdir);
381}
382
383void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata)
384{
385 del_files(sdata, sdata->type);
386 debugfs_remove(sdata->debugfsdir);
387 sdata->debugfsdir = NULL;
388}
389
390void ieee80211_debugfs_change_if_type(struct ieee80211_sub_if_data *sdata,
391 int oldtype)
392{
393 del_files(sdata, oldtype);
394 add_files(sdata);
395}
396
397static int netdev_notify(struct notifier_block * nb,
398 unsigned long state,
399 void *ndev)
400{
401 struct net_device *dev = ndev;
402 struct dentry *dir;
403 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
404 char buf[10+IFNAMSIZ];
405
406 if (state != NETDEV_CHANGENAME)
407 return 0;
408
409 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
410 return 0;
411
412 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
413 return 0;
414
415 sprintf(buf, "netdev:%s", dev->name);
416 dir = sdata->debugfsdir;
417 if (!debugfs_rename(dir->d_parent, dir, dir->d_parent, buf))
418 printk(KERN_ERR "mac80211: debugfs: failed to rename debugfs "
419 "dir to %s\n", buf);
420
421 return 0;
422}
423
424static struct notifier_block mac80211_debugfs_netdev_notifier = {
425 .notifier_call = netdev_notify,
426};
427
428void ieee80211_debugfs_netdev_init(void)
429{
430 int err;
431
432 err = register_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
433 if (err) {
434 printk(KERN_ERR
435 "mac80211: failed to install netdev notifier,"
436 " disabling per-netdev debugfs!\n");
437 } else
438 notif_registered = 1;
439}
440
441void ieee80211_debugfs_netdev_exit(void)
442{
443 unregister_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
444 notif_registered = 0;
445}