2b5e7615e5091d00c41d13b6ceb7a21b1d07b061
[openwrt/openwrt.git] / package / mac80211 / src / mac80211 / debugfs_netdev.c
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
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 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) \
43 static 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) \
57 static 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) \
65 static 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) \
73 static 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 } \
81 static 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 */
91 IEEE80211_IF_FILE(channel_use, channel_use, DEC);
92 IEEE80211_IF_FILE(drop_unencrypted, drop_unencrypted, DEC);
93 IEEE80211_IF_FILE(eapol, eapol, DEC);
94 IEEE80211_IF_FILE(ieee8021_x, ieee802_1x, DEC);
95
96 /* STA/IBSS attributes */
97 IEEE80211_IF_FILE(state, u.sta.state, DEC);
98 IEEE80211_IF_FILE(bssid, u.sta.bssid, MAC);
99 IEEE80211_IF_FILE(prev_bssid, u.sta.prev_bssid, MAC);
100 IEEE80211_IF_FILE(ssid_len, u.sta.ssid_len, SIZE);
101 IEEE80211_IF_FILE(aid, u.sta.aid, DEC);
102 IEEE80211_IF_FILE(ap_capab, u.sta.ap_capab, HEX);
103 IEEE80211_IF_FILE(capab, u.sta.capab, HEX);
104 IEEE80211_IF_FILE(extra_ie_len, u.sta.extra_ie_len, SIZE);
105 IEEE80211_IF_FILE(auth_tries, u.sta.auth_tries, DEC);
106 IEEE80211_IF_FILE(assoc_tries, u.sta.assoc_tries, DEC);
107 IEEE80211_IF_FILE(auth_algs, u.sta.auth_algs, HEX);
108 IEEE80211_IF_FILE(auth_alg, u.sta.auth_alg, DEC);
109 IEEE80211_IF_FILE(auth_transaction, u.sta.auth_transaction, DEC);
110
111 static 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.flags & IEEE80211_STA_SSID_SET ? "SSID\n" : "",
116 sdata->u.sta.flags & IEEE80211_STA_BSSID_SET ? "BSSID\n" : "",
117 sdata->u.sta.flags & IEEE80211_STA_PREV_BSSID_SET ? "prev BSSID\n" : "",
118 sdata->u.sta.flags & IEEE80211_STA_AUTHENTICATED ? "AUTH\n" : "",
119 sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED ? "ASSOC\n" : "",
120 sdata->u.sta.flags & IEEE80211_STA_PROBEREQ_POLL ? "PROBEREQ POLL\n" : "",
121 sdata->flags & IEEE80211_SDATA_USE_PROTECTION ? "CTS prot\n" : "");
122 }
123 __IEEE80211_IF_FILE(flags);
124
125 /* AP attributes */
126 IEEE80211_IF_FILE(num_sta_ps, u.ap.num_sta_ps, ATOMIC);
127 IEEE80211_IF_FILE(dtim_period, u.ap.dtim_period, DEC);
128 IEEE80211_IF_FILE(dtim_count, u.ap.dtim_count, DEC);
129 IEEE80211_IF_FILE(num_beacons, u.ap.num_beacons, DEC);
130 IEEE80211_IF_FILE(force_unicast_rateidx, u.ap.force_unicast_rateidx, DEC);
131 IEEE80211_IF_FILE(max_ratectrl_rateidx, u.ap.max_ratectrl_rateidx, DEC);
132
133 static 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
141 static 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
151 static 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 */
162 IEEE80211_IF_FILE(peer, u.wds.remote_addr, MAC);
163
164 #define DEBUGFS_ADD(name, type)\
165 sdata->debugfs.type.name = debugfs_create_file(#name, 0444,\
166 sdata->debugfsdir, sdata, &name##_ops);
167
168 static void add_sta_files(struct ieee80211_sub_if_data *sdata)
169 {
170 DEBUGFS_ADD(channel_use, sta);
171 DEBUGFS_ADD(drop_unencrypted, sta);
172 DEBUGFS_ADD(eapol, sta);
173 DEBUGFS_ADD(ieee8021_x, sta);
174 DEBUGFS_ADD(state, sta);
175 DEBUGFS_ADD(bssid, sta);
176 DEBUGFS_ADD(prev_bssid, sta);
177 DEBUGFS_ADD(ssid_len, sta);
178 DEBUGFS_ADD(aid, sta);
179 DEBUGFS_ADD(ap_capab, sta);
180 DEBUGFS_ADD(capab, sta);
181 DEBUGFS_ADD(extra_ie_len, sta);
182 DEBUGFS_ADD(auth_tries, sta);
183 DEBUGFS_ADD(assoc_tries, sta);
184 DEBUGFS_ADD(auth_algs, sta);
185 DEBUGFS_ADD(auth_alg, sta);
186 DEBUGFS_ADD(auth_transaction, sta);
187 DEBUGFS_ADD(flags, sta);
188 }
189
190 static void add_ap_files(struct ieee80211_sub_if_data *sdata)
191 {
192 DEBUGFS_ADD(channel_use, ap);
193 DEBUGFS_ADD(drop_unencrypted, ap);
194 DEBUGFS_ADD(eapol, ap);
195 DEBUGFS_ADD(ieee8021_x, ap);
196 DEBUGFS_ADD(num_sta_ps, ap);
197 DEBUGFS_ADD(dtim_period, ap);
198 DEBUGFS_ADD(dtim_count, ap);
199 DEBUGFS_ADD(num_beacons, ap);
200 DEBUGFS_ADD(force_unicast_rateidx, ap);
201 DEBUGFS_ADD(max_ratectrl_rateidx, ap);
202 DEBUGFS_ADD(num_buffered_multicast, ap);
203 DEBUGFS_ADD(beacon_head_len, ap);
204 DEBUGFS_ADD(beacon_tail_len, ap);
205 }
206
207 static void add_wds_files(struct ieee80211_sub_if_data *sdata)
208 {
209 DEBUGFS_ADD(channel_use, wds);
210 DEBUGFS_ADD(drop_unencrypted, wds);
211 DEBUGFS_ADD(eapol, wds);
212 DEBUGFS_ADD(ieee8021_x, wds);
213 DEBUGFS_ADD(peer, wds);
214 }
215
216 static void add_vlan_files(struct ieee80211_sub_if_data *sdata)
217 {
218 DEBUGFS_ADD(channel_use, vlan);
219 DEBUGFS_ADD(drop_unencrypted, vlan);
220 DEBUGFS_ADD(eapol, vlan);
221 DEBUGFS_ADD(ieee8021_x, vlan);
222 }
223
224 static void add_monitor_files(struct ieee80211_sub_if_data *sdata)
225 {
226 }
227
228 static void add_files(struct ieee80211_sub_if_data *sdata)
229 {
230 if (!sdata->debugfsdir)
231 return;
232
233 switch (sdata->type) {
234 case IEEE80211_IF_TYPE_STA:
235 case IEEE80211_IF_TYPE_IBSS:
236 add_sta_files(sdata);
237 break;
238 case IEEE80211_IF_TYPE_AP:
239 add_ap_files(sdata);
240 break;
241 case IEEE80211_IF_TYPE_WDS:
242 add_wds_files(sdata);
243 break;
244 case IEEE80211_IF_TYPE_MNTR:
245 add_monitor_files(sdata);
246 break;
247 case IEEE80211_IF_TYPE_VLAN:
248 add_vlan_files(sdata);
249 break;
250 default:
251 break;
252 }
253 }
254
255 #define DEBUGFS_DEL(name, type) \
256 do { \
257 debugfs_remove(sdata->debugfs.type.name); \
258 sdata->debugfs.type.name = NULL; \
259 } while (0)
260
261 static void del_sta_files(struct ieee80211_sub_if_data *sdata)
262 {
263 DEBUGFS_DEL(channel_use, sta);
264 DEBUGFS_DEL(drop_unencrypted, sta);
265 DEBUGFS_DEL(eapol, sta);
266 DEBUGFS_DEL(ieee8021_x, sta);
267 DEBUGFS_DEL(state, sta);
268 DEBUGFS_DEL(bssid, sta);
269 DEBUGFS_DEL(prev_bssid, sta);
270 DEBUGFS_DEL(ssid_len, sta);
271 DEBUGFS_DEL(aid, sta);
272 DEBUGFS_DEL(ap_capab, sta);
273 DEBUGFS_DEL(capab, sta);
274 DEBUGFS_DEL(extra_ie_len, sta);
275 DEBUGFS_DEL(auth_tries, sta);
276 DEBUGFS_DEL(assoc_tries, sta);
277 DEBUGFS_DEL(auth_algs, sta);
278 DEBUGFS_DEL(auth_alg, sta);
279 DEBUGFS_DEL(auth_transaction, sta);
280 DEBUGFS_DEL(flags, sta);
281 }
282
283 static void del_ap_files(struct ieee80211_sub_if_data *sdata)
284 {
285 DEBUGFS_DEL(channel_use, ap);
286 DEBUGFS_DEL(drop_unencrypted, ap);
287 DEBUGFS_DEL(eapol, ap);
288 DEBUGFS_DEL(ieee8021_x, ap);
289 DEBUGFS_DEL(num_sta_ps, ap);
290 DEBUGFS_DEL(dtim_period, ap);
291 DEBUGFS_DEL(dtim_count, ap);
292 DEBUGFS_DEL(num_beacons, ap);
293 DEBUGFS_DEL(force_unicast_rateidx, ap);
294 DEBUGFS_DEL(max_ratectrl_rateidx, ap);
295 DEBUGFS_DEL(num_buffered_multicast, ap);
296 DEBUGFS_DEL(beacon_head_len, ap);
297 DEBUGFS_DEL(beacon_tail_len, ap);
298 }
299
300 static void del_wds_files(struct ieee80211_sub_if_data *sdata)
301 {
302 DEBUGFS_DEL(channel_use, wds);
303 DEBUGFS_DEL(drop_unencrypted, wds);
304 DEBUGFS_DEL(eapol, wds);
305 DEBUGFS_DEL(ieee8021_x, wds);
306 DEBUGFS_DEL(peer, wds);
307 }
308
309 static void del_vlan_files(struct ieee80211_sub_if_data *sdata)
310 {
311 DEBUGFS_DEL(channel_use, vlan);
312 DEBUGFS_DEL(drop_unencrypted, vlan);
313 DEBUGFS_DEL(eapol, vlan);
314 DEBUGFS_DEL(ieee8021_x, vlan);
315 }
316
317 static void del_monitor_files(struct ieee80211_sub_if_data *sdata)
318 {
319 }
320
321 static void del_files(struct ieee80211_sub_if_data *sdata, int type)
322 {
323 if (!sdata->debugfsdir)
324 return;
325
326 switch (type) {
327 case IEEE80211_IF_TYPE_STA:
328 case IEEE80211_IF_TYPE_IBSS:
329 del_sta_files(sdata);
330 break;
331 case IEEE80211_IF_TYPE_AP:
332 del_ap_files(sdata);
333 break;
334 case IEEE80211_IF_TYPE_WDS:
335 del_wds_files(sdata);
336 break;
337 case IEEE80211_IF_TYPE_MNTR:
338 del_monitor_files(sdata);
339 break;
340 case IEEE80211_IF_TYPE_VLAN:
341 del_vlan_files(sdata);
342 break;
343 default:
344 break;
345 }
346 }
347
348 static int notif_registered;
349
350 void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata)
351 {
352 char buf[10+IFNAMSIZ];
353
354 if (!notif_registered)
355 return;
356
357 sprintf(buf, "netdev:%s", sdata->dev->name);
358 sdata->debugfsdir = debugfs_create_dir(buf,
359 sdata->local->hw.wiphy->debugfsdir);
360 }
361
362 void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata)
363 {
364 del_files(sdata, sdata->type);
365 debugfs_remove(sdata->debugfsdir);
366 sdata->debugfsdir = NULL;
367 }
368
369 void ieee80211_debugfs_change_if_type(struct ieee80211_sub_if_data *sdata,
370 int oldtype)
371 {
372 del_files(sdata, oldtype);
373 add_files(sdata);
374 }
375
376 static int netdev_notify(struct notifier_block * nb,
377 unsigned long state,
378 void *ndev)
379 {
380 struct net_device *dev = ndev;
381 struct dentry *dir;
382 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
383 char buf[10+IFNAMSIZ];
384
385 if (state != NETDEV_CHANGENAME)
386 return 0;
387
388 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
389 return 0;
390
391 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
392 return 0;
393
394 sprintf(buf, "netdev:%s", dev->name);
395 dir = sdata->debugfsdir;
396 if (!debugfs_rename(dir->d_parent, dir, dir->d_parent, buf))
397 printk(KERN_ERR "mac80211: debugfs: failed to rename debugfs "
398 "dir to %s\n", buf);
399
400 return 0;
401 }
402
403 static struct notifier_block mac80211_debugfs_netdev_notifier = {
404 .notifier_call = netdev_notify,
405 };
406
407 void ieee80211_debugfs_netdev_init(void)
408 {
409 int err;
410
411 err = register_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
412 if (err) {
413 printk(KERN_ERR
414 "mac80211: failed to install netdev notifier,"
415 " disabling per-netdev debugfs!\n");
416 } else
417 notif_registered = 1;
418 }
419
420 void ieee80211_debugfs_netdev_exit(void)
421 {
422 unregister_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
423 notif_registered = 0;
424 }