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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 DECLARE_MAC_BUF(mac); \
70 return scnprintf(buf, buflen, "%s\n", print_mac(mac, sdata->field));\
71}
72
73#define __IEEE80211_IF_FILE(name) \
74static ssize_t ieee80211_if_read_##name(struct file *file, \
75 char __user *userbuf, \
76 size_t count, loff_t *ppos) \
77{ \
78 return ieee80211_if_read(file->private_data, \
79 userbuf, count, ppos, \
80 ieee80211_if_fmt_##name); \
81} \
82static const struct file_operations name##_ops = { \
83 .read = ieee80211_if_read_##name, \
84 .open = mac80211_open_file_generic, \
85}
86
87#define IEEE80211_IF_FILE(name, field, format) \
88 IEEE80211_IF_FMT_##format(name, field) \
89 __IEEE80211_IF_FILE(name)
90
91
92IEEE80211_IF_FILE(channel_use, channel_use, DEC);
93IEEE80211_IF_FILE(drop_unencrypted, drop_unencrypted, DEC);
94IEEE80211_IF_FILE(eapol, eapol, DEC);
95IEEE80211_IF_FILE(ieee8021_x, ieee802_1x, DEC);
96
97
98IEEE80211_IF_FILE(state, u.sta.state, DEC);
99IEEE80211_IF_FILE(bssid, u.sta.bssid, MAC);
100IEEE80211_IF_FILE(prev_bssid, u.sta.prev_bssid, MAC);
101IEEE80211_IF_FILE(ssid_len, u.sta.ssid_len, SIZE);
102IEEE80211_IF_FILE(aid, u.sta.aid, DEC);
103IEEE80211_IF_FILE(ap_capab, u.sta.ap_capab, HEX);
104IEEE80211_IF_FILE(capab, u.sta.capab, HEX);
105IEEE80211_IF_FILE(extra_ie_len, u.sta.extra_ie_len, SIZE);
106IEEE80211_IF_FILE(auth_tries, u.sta.auth_tries, DEC);
107IEEE80211_IF_FILE(assoc_tries, u.sta.assoc_tries, DEC);
108IEEE80211_IF_FILE(auth_algs, u.sta.auth_algs, HEX);
109IEEE80211_IF_FILE(auth_alg, u.sta.auth_alg, DEC);
110IEEE80211_IF_FILE(auth_transaction, u.sta.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.sta.flags & IEEE80211_STA_SSID_SET ? "SSID\n" : "",
117 sdata->u.sta.flags & IEEE80211_STA_BSSID_SET ? "BSSID\n" : "",
118 sdata->u.sta.flags & IEEE80211_STA_PREV_BSSID_SET ? "prev BSSID\n" : "",
119 sdata->u.sta.flags & IEEE80211_STA_AUTHENTICATED ? "AUTH\n" : "",
120 sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED ? "ASSOC\n" : "",
121 sdata->u.sta.flags & IEEE80211_STA_PROBEREQ_POLL ? "PROBEREQ POLL\n" : "",
122 sdata->flags & IEEE80211_SDATA_USE_PROTECTION ? "CTS prot\n" : "");
123}
124__IEEE80211_IF_FILE(flags);
125
126
127IEEE80211_IF_FILE(num_sta_ps, u.ap.num_sta_ps, ATOMIC);
128IEEE80211_IF_FILE(dtim_period, u.ap.dtim_period, DEC);
129IEEE80211_IF_FILE(dtim_count, u.ap.dtim_count, DEC);
130IEEE80211_IF_FILE(num_beacons, u.ap.num_beacons, DEC);
131IEEE80211_IF_FILE(force_unicast_rateidx, u.ap.force_unicast_rateidx, DEC);
132IEEE80211_IF_FILE(max_ratectrl_rateidx, u.ap.max_ratectrl_rateidx, DEC);
133
134static ssize_t ieee80211_if_fmt_num_buffered_multicast(
135 const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
136{
137 return scnprintf(buf, buflen, "%u\n",
138 skb_queue_len(&sdata->u.ap.ps_bc_buf));
139}
140__IEEE80211_IF_FILE(num_buffered_multicast);
141
142static ssize_t ieee80211_if_fmt_beacon_head_len(
143 const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
144{
145 if (sdata->u.ap.beacon_head)
146 return scnprintf(buf, buflen, "%d\n",
147 sdata->u.ap.beacon_head_len);
148 return scnprintf(buf, buflen, "\n");
149}
150__IEEE80211_IF_FILE(beacon_head_len);
151
152static ssize_t ieee80211_if_fmt_beacon_tail_len(
153 const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
154{
155 if (sdata->u.ap.beacon_tail)
156 return scnprintf(buf, buflen, "%d\n",
157 sdata->u.ap.beacon_tail_len);
158 return scnprintf(buf, buflen, "\n");
159}
160__IEEE80211_IF_FILE(beacon_tail_len);
161
162
163IEEE80211_IF_FILE(peer, u.wds.remote_addr, MAC);
164
165#define DEBUGFS_ADD(name, type)\
166 sdata->debugfs.type.name = debugfs_create_file(#name, 0444,\
167 sdata->debugfsdir, sdata, &name##_ops);
168
169static void add_sta_files(struct ieee80211_sub_if_data *sdata)
170{
171 DEBUGFS_ADD(channel_use, sta);
172 DEBUGFS_ADD(drop_unencrypted, sta);
173 DEBUGFS_ADD(eapol, sta);
174 DEBUGFS_ADD(ieee8021_x, sta);
175 DEBUGFS_ADD(state, sta);
176 DEBUGFS_ADD(bssid, sta);
177 DEBUGFS_ADD(prev_bssid, sta);
178 DEBUGFS_ADD(ssid_len, sta);
179 DEBUGFS_ADD(aid, sta);
180 DEBUGFS_ADD(ap_capab, sta);
181 DEBUGFS_ADD(capab, sta);
182 DEBUGFS_ADD(extra_ie_len, sta);
183 DEBUGFS_ADD(auth_tries, sta);
184 DEBUGFS_ADD(assoc_tries, sta);
185 DEBUGFS_ADD(auth_algs, sta);
186 DEBUGFS_ADD(auth_alg, sta);
187 DEBUGFS_ADD(auth_transaction, sta);
188 DEBUGFS_ADD(flags, sta);
189}
190
191static void add_ap_files(struct ieee80211_sub_if_data *sdata)
192{
193 DEBUGFS_ADD(channel_use, ap);
194 DEBUGFS_ADD(drop_unencrypted, ap);
195 DEBUGFS_ADD(eapol, ap);
196 DEBUGFS_ADD(ieee8021_x, ap);
197 DEBUGFS_ADD(num_sta_ps, ap);
198 DEBUGFS_ADD(dtim_period, ap);
199 DEBUGFS_ADD(dtim_count, ap);
200 DEBUGFS_ADD(num_beacons, ap);
201 DEBUGFS_ADD(force_unicast_rateidx, ap);
202 DEBUGFS_ADD(max_ratectrl_rateidx, ap);
203 DEBUGFS_ADD(num_buffered_multicast, ap);
204 DEBUGFS_ADD(beacon_head_len, ap);
205 DEBUGFS_ADD(beacon_tail_len, ap);
206}
207
208static void add_wds_files(struct ieee80211_sub_if_data *sdata)
209{
210 DEBUGFS_ADD(channel_use, wds);
211 DEBUGFS_ADD(drop_unencrypted, wds);
212 DEBUGFS_ADD(eapol, wds);
213 DEBUGFS_ADD(ieee8021_x, wds);
214 DEBUGFS_ADD(peer, wds);
215}
216
217static void add_vlan_files(struct ieee80211_sub_if_data *sdata)
218{
219 DEBUGFS_ADD(channel_use, vlan);
220 DEBUGFS_ADD(drop_unencrypted, vlan);
221 DEBUGFS_ADD(eapol, vlan);
222 DEBUGFS_ADD(ieee8021_x, vlan);
223}
224
225static void add_monitor_files(struct ieee80211_sub_if_data *sdata)
226{
227}
228
229static void add_files(struct ieee80211_sub_if_data *sdata)
230{
231 if (!sdata->debugfsdir)
232 return;
233
234 switch (sdata->type) {
235 case IEEE80211_IF_TYPE_STA:
236 case IEEE80211_IF_TYPE_IBSS:
237 add_sta_files(sdata);
238 break;
239 case IEEE80211_IF_TYPE_AP:
240 add_ap_files(sdata);
241 break;
242 case IEEE80211_IF_TYPE_WDS:
243 add_wds_files(sdata);
244 break;
245 case IEEE80211_IF_TYPE_MNTR:
246 add_monitor_files(sdata);
247 break;
248 case IEEE80211_IF_TYPE_VLAN:
249 add_vlan_files(sdata);
250 break;
251 default:
252 break;
253 }
254}
255
256#define DEBUGFS_DEL(name, type) \
257 do { \
258 debugfs_remove(sdata->debugfs.type.name); \
259 sdata->debugfs.type.name = NULL; \
260 } while (0)
261
262static void del_sta_files(struct ieee80211_sub_if_data *sdata)
263{
264 DEBUGFS_DEL(channel_use, sta);
265 DEBUGFS_DEL(drop_unencrypted, sta);
266 DEBUGFS_DEL(eapol, sta);
267 DEBUGFS_DEL(ieee8021_x, sta);
268 DEBUGFS_DEL(state, sta);
269 DEBUGFS_DEL(bssid, sta);
270 DEBUGFS_DEL(prev_bssid, sta);
271 DEBUGFS_DEL(ssid_len, sta);
272 DEBUGFS_DEL(aid, sta);
273 DEBUGFS_DEL(ap_capab, sta);
274 DEBUGFS_DEL(capab, sta);
275 DEBUGFS_DEL(extra_ie_len, sta);
276 DEBUGFS_DEL(auth_tries, sta);
277 DEBUGFS_DEL(assoc_tries, sta);
278 DEBUGFS_DEL(auth_algs, sta);
279 DEBUGFS_DEL(auth_alg, sta);
280 DEBUGFS_DEL(auth_transaction, sta);
281 DEBUGFS_DEL(flags, sta);
282}
283
284static void del_ap_files(struct ieee80211_sub_if_data *sdata)
285{
286 DEBUGFS_DEL(channel_use, ap);
287 DEBUGFS_DEL(drop_unencrypted, ap);
288 DEBUGFS_DEL(eapol, ap);
289 DEBUGFS_DEL(ieee8021_x, ap);
290 DEBUGFS_DEL(num_sta_ps, ap);
291 DEBUGFS_DEL(dtim_period, ap);
292 DEBUGFS_DEL(dtim_count, ap);
293 DEBUGFS_DEL(num_beacons, ap);
294 DEBUGFS_DEL(force_unicast_rateidx, ap);
295 DEBUGFS_DEL(max_ratectrl_rateidx, ap);
296 DEBUGFS_DEL(num_buffered_multicast, ap);
297 DEBUGFS_DEL(beacon_head_len, ap);
298 DEBUGFS_DEL(beacon_tail_len, ap);
299}
300
301static void del_wds_files(struct ieee80211_sub_if_data *sdata)
302{
303 DEBUGFS_DEL(channel_use, wds);
304 DEBUGFS_DEL(drop_unencrypted, wds);
305 DEBUGFS_DEL(eapol, wds);
306 DEBUGFS_DEL(ieee8021_x, wds);
307 DEBUGFS_DEL(peer, wds);
308}
309
310static void del_vlan_files(struct ieee80211_sub_if_data *sdata)
311{
312 DEBUGFS_DEL(channel_use, vlan);
313 DEBUGFS_DEL(drop_unencrypted, vlan);
314 DEBUGFS_DEL(eapol, vlan);
315 DEBUGFS_DEL(ieee8021_x, vlan);
316}
317
318static void del_monitor_files(struct ieee80211_sub_if_data *sdata)
319{
320}
321
322static void del_files(struct ieee80211_sub_if_data *sdata, int type)
323{
324 if (!sdata->debugfsdir)
325 return;
326
327 switch (type) {
328 case IEEE80211_IF_TYPE_STA:
329 case IEEE80211_IF_TYPE_IBSS:
330 del_sta_files(sdata);
331 break;
332 case IEEE80211_IF_TYPE_AP:
333 del_ap_files(sdata);
334 break;
335 case IEEE80211_IF_TYPE_WDS:
336 del_wds_files(sdata);
337 break;
338 case IEEE80211_IF_TYPE_MNTR:
339 del_monitor_files(sdata);
340 break;
341 case IEEE80211_IF_TYPE_VLAN:
342 del_vlan_files(sdata);
343 break;
344 default:
345 break;
346 }
347}
348
349static int notif_registered;
350
351void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata)
352{
353 char buf[10+IFNAMSIZ];
354
355 if (!notif_registered)
356 return;
357
358 sprintf(buf, "netdev:%s", sdata->dev->name);
359 sdata->debugfsdir = debugfs_create_dir(buf,
360 sdata->local->hw.wiphy->debugfsdir);
361}
362
363void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata)
364{
365 del_files(sdata, sdata->type);
366 debugfs_remove(sdata->debugfsdir);
367 sdata->debugfsdir = NULL;
368}
369
370void ieee80211_debugfs_change_if_type(struct ieee80211_sub_if_data *sdata,
371 int oldtype)
372{
373 del_files(sdata, oldtype);
374 add_files(sdata);
375}
376
377static int netdev_notify(struct notifier_block * nb,
378 unsigned long state,
379 void *ndev)
380{
381 struct net_device *dev = ndev;
382 struct dentry *dir;
383 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
384 char buf[10+IFNAMSIZ];
385
386 if (state != NETDEV_CHANGENAME)
387 return 0;
388
389 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
390 return 0;
391
392 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
393 return 0;
394
395 sprintf(buf, "netdev:%s", dev->name);
396 dir = sdata->debugfsdir;
397 if (!debugfs_rename(dir->d_parent, dir, dir->d_parent, buf))
398 printk(KERN_ERR "mac80211: debugfs: failed to rename debugfs "
399 "dir to %s\n", buf);
400
401 return 0;
402}
403
404static struct notifier_block mac80211_debugfs_netdev_notifier = {
405 .notifier_call = netdev_notify,
406};
407
408void ieee80211_debugfs_netdev_init(void)
409{
410 int err;
411
412 err = register_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
413 if (err) {
414 printk(KERN_ERR
415 "mac80211: failed to install netdev notifier,"
416 " disabling per-netdev debugfs!\n");
417 } else
418 notif_registered = 1;
419}
420
421void ieee80211_debugfs_netdev_exit(void)
422{
423 unregister_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
424 notif_registered = 0;
425}
426
