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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland...
[deliverable/linux.git] / net / mac80211 / debugfs_netdev.c
CommitLineData
e9f207f0
JB		 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{ \
0795af57
JP		 69 DECLARE_MAC_BUF(mac); \
70 return scnprintf(buf, buflen, "%s\n", print_mac(mac, sdata->field));\
e9f207f0
JB		 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/* common attributes */
92IEEE80211_IF_FILE(channel_use, channel_use, DEC);
93IEEE80211_IF_FILE(drop_unencrypted, drop_unencrypted, DEC);
ce3edf6d 94IEEE80211_IF_FILE(ieee802_1x_pac, ieee802_1x_pac, DEC);
e9f207f0
JB		 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",
d6f2da5b
JS		 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" : "",
471b3efd 121 sdata->bss_conf.use_cts_prot ? "CTS prot\n" : "");
e9f207f0
JB		 122}
123__IEEE80211_IF_FILE(flags);
124
125/* AP attributes */
126IEEE80211_IF_FILE(num_sta_ps, u.ap.num_sta_ps, ATOMIC);
e9f207f0
JB		 127IEEE80211_IF_FILE(dtim_count, u.ap.dtim_count, DEC);
128IEEE80211_IF_FILE(num_beacons, u.ap.num_beacons, DEC);
129IEEE80211_IF_FILE(force_unicast_rateidx, u.ap.force_unicast_rateidx, DEC);
130IEEE80211_IF_FILE(max_ratectrl_rateidx, u.ap.max_ratectrl_rateidx, DEC);
131
132static ssize_t ieee80211_if_fmt_num_buffered_multicast(
133 const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
134{
135 return scnprintf(buf, buflen, "%u\n",
136 skb_queue_len(&sdata->u.ap.ps_bc_buf));
137}
138__IEEE80211_IF_FILE(num_buffered_multicast);
139
e9f207f0
JB		 140/* WDS attributes */
141IEEE80211_IF_FILE(peer, u.wds.remote_addr, MAC);
142
e9f207f0
JB		 143#define DEBUGFS_ADD(name, type)\
144 sdata->debugfs.type.name = debugfs_create_file(#name, 0444,\
145 sdata->debugfsdir, sdata, &name##_ops);
146
147static void add_sta_files(struct ieee80211_sub_if_data *sdata)
148{
149 DEBUGFS_ADD(channel_use, sta);
150 DEBUGFS_ADD(drop_unencrypted, sta);
ce3edf6d 151 DEBUGFS_ADD(ieee802_1x_pac, sta);
e9f207f0
JB		 152 DEBUGFS_ADD(state, sta);
153 DEBUGFS_ADD(bssid, sta);
154 DEBUGFS_ADD(prev_bssid, sta);
155 DEBUGFS_ADD(ssid_len, sta);
156 DEBUGFS_ADD(aid, sta);
157 DEBUGFS_ADD(ap_capab, sta);
158 DEBUGFS_ADD(capab, sta);
159 DEBUGFS_ADD(extra_ie_len, sta);
160 DEBUGFS_ADD(auth_tries, sta);
161 DEBUGFS_ADD(assoc_tries, sta);
162 DEBUGFS_ADD(auth_algs, sta);
163 DEBUGFS_ADD(auth_alg, sta);
164 DEBUGFS_ADD(auth_transaction, sta);
165 DEBUGFS_ADD(flags, sta);
166}
167
168static void add_ap_files(struct ieee80211_sub_if_data *sdata)
169{
170 DEBUGFS_ADD(channel_use, ap);
171 DEBUGFS_ADD(drop_unencrypted, ap);
ce3edf6d 172 DEBUGFS_ADD(ieee802_1x_pac, ap);
e9f207f0 173 DEBUGFS_ADD(num_sta_ps, ap);
e9f207f0
JB		 174 DEBUGFS_ADD(dtim_count, ap);
175 DEBUGFS_ADD(num_beacons, ap);
176 DEBUGFS_ADD(force_unicast_rateidx, ap);
177 DEBUGFS_ADD(max_ratectrl_rateidx, ap);
178 DEBUGFS_ADD(num_buffered_multicast, ap);
e9f207f0
JB		 179}
180
181static void add_wds_files(struct ieee80211_sub_if_data *sdata)
182{
183 DEBUGFS_ADD(channel_use, wds);
184 DEBUGFS_ADD(drop_unencrypted, wds);
ce3edf6d 185 DEBUGFS_ADD(ieee802_1x_pac, wds);
e9f207f0
JB		 186 DEBUGFS_ADD(peer, wds);
187}
188
189static void add_vlan_files(struct ieee80211_sub_if_data *sdata)
190{
191 DEBUGFS_ADD(channel_use, vlan);
192 DEBUGFS_ADD(drop_unencrypted, vlan);
ce3edf6d 193 DEBUGFS_ADD(ieee802_1x_pac, vlan);
e9f207f0
JB		 194}
195
196static void add_monitor_files(struct ieee80211_sub_if_data *sdata)
197{
e9f207f0
JB		 198}
199
200static void add_files(struct ieee80211_sub_if_data *sdata)
201{
202 if (!sdata->debugfsdir)
203 return;
204
51fb61e7 205 switch (sdata->vif.type) {
e9f207f0
JB		 206 case IEEE80211_IF_TYPE_STA:
207 case IEEE80211_IF_TYPE_IBSS:
208 add_sta_files(sdata);
209 break;
210 case IEEE80211_IF_TYPE_AP:
211 add_ap_files(sdata);
212 break;
213 case IEEE80211_IF_TYPE_WDS:
214 add_wds_files(sdata);
215 break;
216 case IEEE80211_IF_TYPE_MNTR:
217 add_monitor_files(sdata);
218 break;
219 case IEEE80211_IF_TYPE_VLAN:
220 add_vlan_files(sdata);
221 break;
222 default:
223 break;
224 }
225}
226
21887b2f
ZY		 227#define DEBUGFS_DEL(name, type) \
228 do { \
229 debugfs_remove(sdata->debugfs.type.name); \
230 sdata->debugfs.type.name = NULL; \
231 } while (0)
e9f207f0
JB		 232
233static void del_sta_files(struct ieee80211_sub_if_data *sdata)
234{
235 DEBUGFS_DEL(channel_use, sta);
236 DEBUGFS_DEL(drop_unencrypted, sta);
ce3edf6d 237 DEBUGFS_DEL(ieee802_1x_pac, sta);
e9f207f0
JB		 238 DEBUGFS_DEL(state, sta);
239 DEBUGFS_DEL(bssid, sta);
240 DEBUGFS_DEL(prev_bssid, sta);
241 DEBUGFS_DEL(ssid_len, sta);
242 DEBUGFS_DEL(aid, sta);
243 DEBUGFS_DEL(ap_capab, sta);
244 DEBUGFS_DEL(capab, sta);
245 DEBUGFS_DEL(extra_ie_len, sta);
246 DEBUGFS_DEL(auth_tries, sta);
247 DEBUGFS_DEL(assoc_tries, sta);
248 DEBUGFS_DEL(auth_algs, sta);
249 DEBUGFS_DEL(auth_alg, sta);
250 DEBUGFS_DEL(auth_transaction, sta);
251 DEBUGFS_DEL(flags, sta);
252}
253
254static void del_ap_files(struct ieee80211_sub_if_data *sdata)
255{
256 DEBUGFS_DEL(channel_use, ap);
257 DEBUGFS_DEL(drop_unencrypted, ap);
ce3edf6d 258 DEBUGFS_DEL(ieee802_1x_pac, ap);
e9f207f0 259 DEBUGFS_DEL(num_sta_ps, ap);
e9f207f0
JB		 260 DEBUGFS_DEL(dtim_count, ap);
261 DEBUGFS_DEL(num_beacons, ap);
262 DEBUGFS_DEL(force_unicast_rateidx, ap);
263 DEBUGFS_DEL(max_ratectrl_rateidx, ap);
264 DEBUGFS_DEL(num_buffered_multicast, ap);
e9f207f0
JB		 265}
266
267static void del_wds_files(struct ieee80211_sub_if_data *sdata)
268{
269 DEBUGFS_DEL(channel_use, wds);
270 DEBUGFS_DEL(drop_unencrypted, wds);
ce3edf6d 271 DEBUGFS_DEL(ieee802_1x_pac, wds);
e9f207f0
JB		 272 DEBUGFS_DEL(peer, wds);
273}
274
275static void del_vlan_files(struct ieee80211_sub_if_data *sdata)
276{
277 DEBUGFS_DEL(channel_use, vlan);
278 DEBUGFS_DEL(drop_unencrypted, vlan);
ce3edf6d 279 DEBUGFS_DEL(ieee802_1x_pac, vlan);
e9f207f0
JB		 280}
281
282static void del_monitor_files(struct ieee80211_sub_if_data *sdata)
283{
e9f207f0
JB		 284}
285
286static void del_files(struct ieee80211_sub_if_data *sdata, int type)
287{
288 if (!sdata->debugfsdir)
289 return;
290
291 switch (type) {
292 case IEEE80211_IF_TYPE_STA:
293 case IEEE80211_IF_TYPE_IBSS:
294 del_sta_files(sdata);
295 break;
296 case IEEE80211_IF_TYPE_AP:
297 del_ap_files(sdata);
298 break;
299 case IEEE80211_IF_TYPE_WDS:
300 del_wds_files(sdata);
301 break;
302 case IEEE80211_IF_TYPE_MNTR:
303 del_monitor_files(sdata);
304 break;
305 case IEEE80211_IF_TYPE_VLAN:
306 del_vlan_files(sdata);
307 break;
308 default:
309 break;
310 }
311}
312
313static int notif_registered;
314
315void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata)
316{
317 char buf[10+IFNAMSIZ];
318
319 if (!notif_registered)
320 return;
321
322 sprintf(buf, "netdev:%s", sdata->dev->name);
323 sdata->debugfsdir = debugfs_create_dir(buf,
324 sdata->local->hw.wiphy->debugfsdir);
325}
326
327void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata)
328{
51fb61e7 329 del_files(sdata, sdata->vif.type);
e9f207f0
JB		 330 debugfs_remove(sdata->debugfsdir);
331 sdata->debugfsdir = NULL;
332}
333
334void ieee80211_debugfs_change_if_type(struct ieee80211_sub_if_data *sdata,
335 int oldtype)
336{
337 del_files(sdata, oldtype);
338 add_files(sdata);
339}
340
341static int netdev_notify(struct notifier_block * nb,
342 unsigned long state,
343 void *ndev)
344{
345 struct net_device *dev = ndev;
7c8081eb
JB		 346 struct dentry *dir;
347 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
e9f207f0
JB		 348 char buf[10+IFNAMSIZ];
349
350 if (state != NETDEV_CHANGENAME)
351 return 0;
352
353 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
354 return 0;
355
356 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
357 return 0;
358
e9f207f0 359 sprintf(buf, "netdev:%s", dev->name);
7c8081eb
JB		 360 dir = sdata->debugfsdir;
361 if (!debugfs_rename(dir->d_parent, dir, dir->d_parent, buf))
362 printk(KERN_ERR "mac80211: debugfs: failed to rename debugfs "
363 "dir to %s\n", buf);
e9f207f0
JB		 364
365 return 0;
366}
367
368static struct notifier_block mac80211_debugfs_netdev_notifier = {
369 .notifier_call = netdev_notify,
370};
371
372void ieee80211_debugfs_netdev_init(void)
373{
374 int err;
375
376 err = register_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
377 if (err) {
378 printk(KERN_ERR
379 "mac80211: failed to install netdev notifier,"
380 " disabling per-netdev debugfs!\n");
381 } else
382 notif_registered = 1;
383}
384
385void ieee80211_debugfs_netdev_exit(void)
386{
387 unregister_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
388 notif_registered = 0;
389}
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