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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 | ||
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 | { \ | |
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) \ | |
74 | static 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 | } \ | |
82 | static 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 */ | |
92 | IEEE80211_IF_FILE(channel_use, channel_use, DEC); | |
93 | IEEE80211_IF_FILE(drop_unencrypted, drop_unencrypted, DEC); | |
ce3edf6d | 94 | IEEE80211_IF_FILE(ieee802_1x_pac, ieee802_1x_pac, DEC); |
e9f207f0 JB |
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", | |
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" : "", | |
13262ffd | 121 | sdata->flags & IEEE80211_SDATA_USE_PROTECTION ? "CTS prot\n" : ""); |
e9f207f0 JB |
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 | ||
e9f207f0 JB |
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); | |
ce3edf6d | 172 | DEBUGFS_ADD(ieee802_1x_pac, sta); |
e9f207f0 JB |
173 | DEBUGFS_ADD(state, sta); |
174 | DEBUGFS_ADD(bssid, sta); | |
175 | DEBUGFS_ADD(prev_bssid, sta); | |
176 | DEBUGFS_ADD(ssid_len, sta); | |
177 | DEBUGFS_ADD(aid, sta); | |
178 | DEBUGFS_ADD(ap_capab, sta); | |
179 | DEBUGFS_ADD(capab, sta); | |
180 | DEBUGFS_ADD(extra_ie_len, sta); | |
181 | DEBUGFS_ADD(auth_tries, sta); | |
182 | DEBUGFS_ADD(assoc_tries, sta); | |
183 | DEBUGFS_ADD(auth_algs, sta); | |
184 | DEBUGFS_ADD(auth_alg, sta); | |
185 | DEBUGFS_ADD(auth_transaction, sta); | |
186 | DEBUGFS_ADD(flags, sta); | |
187 | } | |
188 | ||
189 | static void add_ap_files(struct ieee80211_sub_if_data *sdata) | |
190 | { | |
191 | DEBUGFS_ADD(channel_use, ap); | |
192 | DEBUGFS_ADD(drop_unencrypted, ap); | |
ce3edf6d | 193 | DEBUGFS_ADD(ieee802_1x_pac, ap); |
e9f207f0 JB |
194 | DEBUGFS_ADD(num_sta_ps, ap); |
195 | DEBUGFS_ADD(dtim_period, ap); | |
196 | DEBUGFS_ADD(dtim_count, ap); | |
197 | DEBUGFS_ADD(num_beacons, ap); | |
198 | DEBUGFS_ADD(force_unicast_rateidx, ap); | |
199 | DEBUGFS_ADD(max_ratectrl_rateidx, ap); | |
200 | DEBUGFS_ADD(num_buffered_multicast, ap); | |
201 | DEBUGFS_ADD(beacon_head_len, ap); | |
202 | DEBUGFS_ADD(beacon_tail_len, ap); | |
203 | } | |
204 | ||
205 | static void add_wds_files(struct ieee80211_sub_if_data *sdata) | |
206 | { | |
207 | DEBUGFS_ADD(channel_use, wds); | |
208 | DEBUGFS_ADD(drop_unencrypted, wds); | |
ce3edf6d | 209 | DEBUGFS_ADD(ieee802_1x_pac, wds); |
e9f207f0 JB |
210 | DEBUGFS_ADD(peer, wds); |
211 | } | |
212 | ||
213 | static void add_vlan_files(struct ieee80211_sub_if_data *sdata) | |
214 | { | |
215 | DEBUGFS_ADD(channel_use, vlan); | |
216 | DEBUGFS_ADD(drop_unencrypted, vlan); | |
ce3edf6d | 217 | DEBUGFS_ADD(ieee802_1x_pac, vlan); |
e9f207f0 JB |
218 | } |
219 | ||
220 | static void add_monitor_files(struct ieee80211_sub_if_data *sdata) | |
221 | { | |
e9f207f0 JB |
222 | } |
223 | ||
224 | static void add_files(struct ieee80211_sub_if_data *sdata) | |
225 | { | |
226 | if (!sdata->debugfsdir) | |
227 | return; | |
228 | ||
229 | switch (sdata->type) { | |
230 | case IEEE80211_IF_TYPE_STA: | |
231 | case IEEE80211_IF_TYPE_IBSS: | |
232 | add_sta_files(sdata); | |
233 | break; | |
234 | case IEEE80211_IF_TYPE_AP: | |
235 | add_ap_files(sdata); | |
236 | break; | |
237 | case IEEE80211_IF_TYPE_WDS: | |
238 | add_wds_files(sdata); | |
239 | break; | |
240 | case IEEE80211_IF_TYPE_MNTR: | |
241 | add_monitor_files(sdata); | |
242 | break; | |
243 | case IEEE80211_IF_TYPE_VLAN: | |
244 | add_vlan_files(sdata); | |
245 | break; | |
246 | default: | |
247 | break; | |
248 | } | |
249 | } | |
250 | ||
21887b2f ZY |
251 | #define DEBUGFS_DEL(name, type) \ |
252 | do { \ | |
253 | debugfs_remove(sdata->debugfs.type.name); \ | |
254 | sdata->debugfs.type.name = NULL; \ | |
255 | } while (0) | |
e9f207f0 JB |
256 | |
257 | static void del_sta_files(struct ieee80211_sub_if_data *sdata) | |
258 | { | |
259 | DEBUGFS_DEL(channel_use, sta); | |
260 | DEBUGFS_DEL(drop_unencrypted, sta); | |
ce3edf6d | 261 | DEBUGFS_DEL(ieee802_1x_pac, sta); |
e9f207f0 JB |
262 | DEBUGFS_DEL(state, sta); |
263 | DEBUGFS_DEL(bssid, sta); | |
264 | DEBUGFS_DEL(prev_bssid, sta); | |
265 | DEBUGFS_DEL(ssid_len, sta); | |
266 | DEBUGFS_DEL(aid, sta); | |
267 | DEBUGFS_DEL(ap_capab, sta); | |
268 | DEBUGFS_DEL(capab, sta); | |
269 | DEBUGFS_DEL(extra_ie_len, sta); | |
270 | DEBUGFS_DEL(auth_tries, sta); | |
271 | DEBUGFS_DEL(assoc_tries, sta); | |
272 | DEBUGFS_DEL(auth_algs, sta); | |
273 | DEBUGFS_DEL(auth_alg, sta); | |
274 | DEBUGFS_DEL(auth_transaction, sta); | |
275 | DEBUGFS_DEL(flags, sta); | |
276 | } | |
277 | ||
278 | static void del_ap_files(struct ieee80211_sub_if_data *sdata) | |
279 | { | |
280 | DEBUGFS_DEL(channel_use, ap); | |
281 | DEBUGFS_DEL(drop_unencrypted, ap); | |
ce3edf6d | 282 | DEBUGFS_DEL(ieee802_1x_pac, ap); |
e9f207f0 JB |
283 | DEBUGFS_DEL(num_sta_ps, ap); |
284 | DEBUGFS_DEL(dtim_period, ap); | |
285 | DEBUGFS_DEL(dtim_count, ap); | |
286 | DEBUGFS_DEL(num_beacons, ap); | |
287 | DEBUGFS_DEL(force_unicast_rateidx, ap); | |
288 | DEBUGFS_DEL(max_ratectrl_rateidx, ap); | |
289 | DEBUGFS_DEL(num_buffered_multicast, ap); | |
290 | DEBUGFS_DEL(beacon_head_len, ap); | |
291 | DEBUGFS_DEL(beacon_tail_len, ap); | |
292 | } | |
293 | ||
294 | static void del_wds_files(struct ieee80211_sub_if_data *sdata) | |
295 | { | |
296 | DEBUGFS_DEL(channel_use, wds); | |
297 | DEBUGFS_DEL(drop_unencrypted, wds); | |
ce3edf6d | 298 | DEBUGFS_DEL(ieee802_1x_pac, wds); |
e9f207f0 JB |
299 | DEBUGFS_DEL(peer, wds); |
300 | } | |
301 | ||
302 | static void del_vlan_files(struct ieee80211_sub_if_data *sdata) | |
303 | { | |
304 | DEBUGFS_DEL(channel_use, vlan); | |
305 | DEBUGFS_DEL(drop_unencrypted, vlan); | |
ce3edf6d | 306 | DEBUGFS_DEL(ieee802_1x_pac, vlan); |
e9f207f0 JB |
307 | } |
308 | ||
309 | static void del_monitor_files(struct ieee80211_sub_if_data *sdata) | |
310 | { | |
e9f207f0 JB |
311 | } |
312 | ||
313 | static void del_files(struct ieee80211_sub_if_data *sdata, int type) | |
314 | { | |
315 | if (!sdata->debugfsdir) | |
316 | return; | |
317 | ||
318 | switch (type) { | |
319 | case IEEE80211_IF_TYPE_STA: | |
320 | case IEEE80211_IF_TYPE_IBSS: | |
321 | del_sta_files(sdata); | |
322 | break; | |
323 | case IEEE80211_IF_TYPE_AP: | |
324 | del_ap_files(sdata); | |
325 | break; | |
326 | case IEEE80211_IF_TYPE_WDS: | |
327 | del_wds_files(sdata); | |
328 | break; | |
329 | case IEEE80211_IF_TYPE_MNTR: | |
330 | del_monitor_files(sdata); | |
331 | break; | |
332 | case IEEE80211_IF_TYPE_VLAN: | |
333 | del_vlan_files(sdata); | |
334 | break; | |
335 | default: | |
336 | break; | |
337 | } | |
338 | } | |
339 | ||
340 | static int notif_registered; | |
341 | ||
342 | void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata) | |
343 | { | |
344 | char buf[10+IFNAMSIZ]; | |
345 | ||
346 | if (!notif_registered) | |
347 | return; | |
348 | ||
349 | sprintf(buf, "netdev:%s", sdata->dev->name); | |
350 | sdata->debugfsdir = debugfs_create_dir(buf, | |
351 | sdata->local->hw.wiphy->debugfsdir); | |
352 | } | |
353 | ||
354 | void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata) | |
355 | { | |
356 | del_files(sdata, sdata->type); | |
357 | debugfs_remove(sdata->debugfsdir); | |
358 | sdata->debugfsdir = NULL; | |
359 | } | |
360 | ||
361 | void ieee80211_debugfs_change_if_type(struct ieee80211_sub_if_data *sdata, | |
362 | int oldtype) | |
363 | { | |
364 | del_files(sdata, oldtype); | |
365 | add_files(sdata); | |
366 | } | |
367 | ||
368 | static int netdev_notify(struct notifier_block * nb, | |
369 | unsigned long state, | |
370 | void *ndev) | |
371 | { | |
372 | struct net_device *dev = ndev; | |
7c8081eb JB |
373 | struct dentry *dir; |
374 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
e9f207f0 JB |
375 | char buf[10+IFNAMSIZ]; |
376 | ||
377 | if (state != NETDEV_CHANGENAME) | |
378 | return 0; | |
379 | ||
380 | if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) | |
381 | return 0; | |
382 | ||
383 | if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) | |
384 | return 0; | |
385 | ||
e9f207f0 | 386 | sprintf(buf, "netdev:%s", dev->name); |
7c8081eb JB |
387 | dir = sdata->debugfsdir; |
388 | if (!debugfs_rename(dir->d_parent, dir, dir->d_parent, buf)) | |
389 | printk(KERN_ERR "mac80211: debugfs: failed to rename debugfs " | |
390 | "dir to %s\n", buf); | |
e9f207f0 JB |
391 | |
392 | return 0; | |
393 | } | |
394 | ||
395 | static struct notifier_block mac80211_debugfs_netdev_notifier = { | |
396 | .notifier_call = netdev_notify, | |
397 | }; | |
398 | ||
399 | void ieee80211_debugfs_netdev_init(void) | |
400 | { | |
401 | int err; | |
402 | ||
403 | err = register_netdevice_notifier(&mac80211_debugfs_netdev_notifier); | |
404 | if (err) { | |
405 | printk(KERN_ERR | |
406 | "mac80211: failed to install netdev notifier," | |
407 | " disabling per-netdev debugfs!\n"); | |
408 | } else | |
409 | notif_registered = 1; | |
410 | } | |
411 | ||
412 | void ieee80211_debugfs_netdev_exit(void) | |
413 | { | |
414 | unregister_netdevice_notifier(&mac80211_debugfs_netdev_notifier); | |
415 | notif_registered = 0; | |
416 | } |