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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); | |
e9f207f0 JB |
94 | |
95 | /* STA/IBSS attributes */ | |
96 | IEEE80211_IF_FILE(state, u.sta.state, DEC); | |
97 | IEEE80211_IF_FILE(bssid, u.sta.bssid, MAC); | |
98 | IEEE80211_IF_FILE(prev_bssid, u.sta.prev_bssid, MAC); | |
99 | IEEE80211_IF_FILE(ssid_len, u.sta.ssid_len, SIZE); | |
100 | IEEE80211_IF_FILE(aid, u.sta.aid, DEC); | |
101 | IEEE80211_IF_FILE(ap_capab, u.sta.ap_capab, HEX); | |
102 | IEEE80211_IF_FILE(capab, u.sta.capab, HEX); | |
103 | IEEE80211_IF_FILE(extra_ie_len, u.sta.extra_ie_len, SIZE); | |
104 | IEEE80211_IF_FILE(auth_tries, u.sta.auth_tries, DEC); | |
105 | IEEE80211_IF_FILE(assoc_tries, u.sta.assoc_tries, DEC); | |
106 | IEEE80211_IF_FILE(auth_algs, u.sta.auth_algs, HEX); | |
107 | IEEE80211_IF_FILE(auth_alg, u.sta.auth_alg, DEC); | |
108 | IEEE80211_IF_FILE(auth_transaction, u.sta.auth_transaction, DEC); | |
109 | ||
110 | static ssize_t ieee80211_if_fmt_flags( | |
111 | const struct ieee80211_sub_if_data *sdata, char *buf, int buflen) | |
112 | { | |
113 | return scnprintf(buf, buflen, "%s%s%s%s%s%s%s\n", | |
d6f2da5b JS |
114 | sdata->u.sta.flags & IEEE80211_STA_SSID_SET ? "SSID\n" : "", |
115 | sdata->u.sta.flags & IEEE80211_STA_BSSID_SET ? "BSSID\n" : "", | |
116 | sdata->u.sta.flags & IEEE80211_STA_PREV_BSSID_SET ? "prev BSSID\n" : "", | |
117 | sdata->u.sta.flags & IEEE80211_STA_AUTHENTICATED ? "AUTH\n" : "", | |
118 | sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED ? "ASSOC\n" : "", | |
119 | sdata->u.sta.flags & IEEE80211_STA_PROBEREQ_POLL ? "PROBEREQ POLL\n" : "", | |
471b3efd | 120 | sdata->bss_conf.use_cts_prot ? "CTS prot\n" : ""); |
e9f207f0 JB |
121 | } |
122 | __IEEE80211_IF_FILE(flags); | |
123 | ||
124 | /* AP attributes */ | |
125 | IEEE80211_IF_FILE(num_sta_ps, u.ap.num_sta_ps, ATOMIC); | |
e9f207f0 JB |
126 | IEEE80211_IF_FILE(dtim_count, u.ap.dtim_count, DEC); |
127 | IEEE80211_IF_FILE(num_beacons, u.ap.num_beacons, DEC); | |
128 | IEEE80211_IF_FILE(force_unicast_rateidx, u.ap.force_unicast_rateidx, DEC); | |
129 | IEEE80211_IF_FILE(max_ratectrl_rateidx, u.ap.max_ratectrl_rateidx, DEC); | |
130 | ||
131 | static ssize_t ieee80211_if_fmt_num_buffered_multicast( | |
132 | const struct ieee80211_sub_if_data *sdata, char *buf, int buflen) | |
133 | { | |
134 | return scnprintf(buf, buflen, "%u\n", | |
135 | skb_queue_len(&sdata->u.ap.ps_bc_buf)); | |
136 | } | |
137 | __IEEE80211_IF_FILE(num_buffered_multicast); | |
138 | ||
e9f207f0 JB |
139 | /* WDS attributes */ |
140 | IEEE80211_IF_FILE(peer, u.wds.remote_addr, MAC); | |
141 | ||
e9f207f0 JB |
142 | #define DEBUGFS_ADD(name, type)\ |
143 | sdata->debugfs.type.name = debugfs_create_file(#name, 0444,\ | |
144 | sdata->debugfsdir, sdata, &name##_ops); | |
145 | ||
146 | static void add_sta_files(struct ieee80211_sub_if_data *sdata) | |
147 | { | |
148 | DEBUGFS_ADD(channel_use, sta); | |
149 | DEBUGFS_ADD(drop_unencrypted, sta); | |
e9f207f0 JB |
150 | DEBUGFS_ADD(state, sta); |
151 | DEBUGFS_ADD(bssid, sta); | |
152 | DEBUGFS_ADD(prev_bssid, sta); | |
153 | DEBUGFS_ADD(ssid_len, sta); | |
154 | DEBUGFS_ADD(aid, sta); | |
155 | DEBUGFS_ADD(ap_capab, sta); | |
156 | DEBUGFS_ADD(capab, sta); | |
157 | DEBUGFS_ADD(extra_ie_len, sta); | |
158 | DEBUGFS_ADD(auth_tries, sta); | |
159 | DEBUGFS_ADD(assoc_tries, sta); | |
160 | DEBUGFS_ADD(auth_algs, sta); | |
161 | DEBUGFS_ADD(auth_alg, sta); | |
162 | DEBUGFS_ADD(auth_transaction, sta); | |
163 | DEBUGFS_ADD(flags, sta); | |
164 | } | |
165 | ||
166 | static void add_ap_files(struct ieee80211_sub_if_data *sdata) | |
167 | { | |
168 | DEBUGFS_ADD(channel_use, ap); | |
169 | DEBUGFS_ADD(drop_unencrypted, ap); | |
e9f207f0 | 170 | DEBUGFS_ADD(num_sta_ps, ap); |
e9f207f0 JB |
171 | DEBUGFS_ADD(dtim_count, ap); |
172 | DEBUGFS_ADD(num_beacons, ap); | |
173 | DEBUGFS_ADD(force_unicast_rateidx, ap); | |
174 | DEBUGFS_ADD(max_ratectrl_rateidx, ap); | |
175 | DEBUGFS_ADD(num_buffered_multicast, ap); | |
e9f207f0 JB |
176 | } |
177 | ||
178 | static void add_wds_files(struct ieee80211_sub_if_data *sdata) | |
179 | { | |
180 | DEBUGFS_ADD(channel_use, wds); | |
181 | DEBUGFS_ADD(drop_unencrypted, wds); | |
e9f207f0 JB |
182 | DEBUGFS_ADD(peer, wds); |
183 | } | |
184 | ||
185 | static void add_vlan_files(struct ieee80211_sub_if_data *sdata) | |
186 | { | |
187 | DEBUGFS_ADD(channel_use, vlan); | |
188 | DEBUGFS_ADD(drop_unencrypted, vlan); | |
e9f207f0 JB |
189 | } |
190 | ||
191 | static void add_monitor_files(struct ieee80211_sub_if_data *sdata) | |
192 | { | |
e9f207f0 JB |
193 | } |
194 | ||
195 | static void add_files(struct ieee80211_sub_if_data *sdata) | |
196 | { | |
197 | if (!sdata->debugfsdir) | |
198 | return; | |
199 | ||
51fb61e7 | 200 | switch (sdata->vif.type) { |
e9f207f0 JB |
201 | case IEEE80211_IF_TYPE_STA: |
202 | case IEEE80211_IF_TYPE_IBSS: | |
203 | add_sta_files(sdata); | |
204 | break; | |
205 | case IEEE80211_IF_TYPE_AP: | |
206 | add_ap_files(sdata); | |
207 | break; | |
208 | case IEEE80211_IF_TYPE_WDS: | |
209 | add_wds_files(sdata); | |
210 | break; | |
211 | case IEEE80211_IF_TYPE_MNTR: | |
212 | add_monitor_files(sdata); | |
213 | break; | |
214 | case IEEE80211_IF_TYPE_VLAN: | |
215 | add_vlan_files(sdata); | |
216 | break; | |
217 | default: | |
218 | break; | |
219 | } | |
220 | } | |
221 | ||
21887b2f ZY |
222 | #define DEBUGFS_DEL(name, type) \ |
223 | do { \ | |
224 | debugfs_remove(sdata->debugfs.type.name); \ | |
225 | sdata->debugfs.type.name = NULL; \ | |
226 | } while (0) | |
e9f207f0 JB |
227 | |
228 | static void del_sta_files(struct ieee80211_sub_if_data *sdata) | |
229 | { | |
230 | DEBUGFS_DEL(channel_use, sta); | |
231 | DEBUGFS_DEL(drop_unencrypted, sta); | |
e9f207f0 JB |
232 | DEBUGFS_DEL(state, sta); |
233 | DEBUGFS_DEL(bssid, sta); | |
234 | DEBUGFS_DEL(prev_bssid, sta); | |
235 | DEBUGFS_DEL(ssid_len, sta); | |
236 | DEBUGFS_DEL(aid, sta); | |
237 | DEBUGFS_DEL(ap_capab, sta); | |
238 | DEBUGFS_DEL(capab, sta); | |
239 | DEBUGFS_DEL(extra_ie_len, sta); | |
240 | DEBUGFS_DEL(auth_tries, sta); | |
241 | DEBUGFS_DEL(assoc_tries, sta); | |
242 | DEBUGFS_DEL(auth_algs, sta); | |
243 | DEBUGFS_DEL(auth_alg, sta); | |
244 | DEBUGFS_DEL(auth_transaction, sta); | |
245 | DEBUGFS_DEL(flags, sta); | |
246 | } | |
247 | ||
248 | static void del_ap_files(struct ieee80211_sub_if_data *sdata) | |
249 | { | |
250 | DEBUGFS_DEL(channel_use, ap); | |
251 | DEBUGFS_DEL(drop_unencrypted, ap); | |
e9f207f0 | 252 | DEBUGFS_DEL(num_sta_ps, ap); |
e9f207f0 JB |
253 | DEBUGFS_DEL(dtim_count, ap); |
254 | DEBUGFS_DEL(num_beacons, ap); | |
255 | DEBUGFS_DEL(force_unicast_rateidx, ap); | |
256 | DEBUGFS_DEL(max_ratectrl_rateidx, ap); | |
257 | DEBUGFS_DEL(num_buffered_multicast, ap); | |
e9f207f0 JB |
258 | } |
259 | ||
260 | static void del_wds_files(struct ieee80211_sub_if_data *sdata) | |
261 | { | |
262 | DEBUGFS_DEL(channel_use, wds); | |
263 | DEBUGFS_DEL(drop_unencrypted, wds); | |
e9f207f0 JB |
264 | DEBUGFS_DEL(peer, wds); |
265 | } | |
266 | ||
267 | static void del_vlan_files(struct ieee80211_sub_if_data *sdata) | |
268 | { | |
269 | DEBUGFS_DEL(channel_use, vlan); | |
270 | DEBUGFS_DEL(drop_unencrypted, vlan); | |
e9f207f0 JB |
271 | } |
272 | ||
273 | static void del_monitor_files(struct ieee80211_sub_if_data *sdata) | |
274 | { | |
e9f207f0 JB |
275 | } |
276 | ||
277 | static void del_files(struct ieee80211_sub_if_data *sdata, int type) | |
278 | { | |
279 | if (!sdata->debugfsdir) | |
280 | return; | |
281 | ||
282 | switch (type) { | |
283 | case IEEE80211_IF_TYPE_STA: | |
284 | case IEEE80211_IF_TYPE_IBSS: | |
285 | del_sta_files(sdata); | |
286 | break; | |
287 | case IEEE80211_IF_TYPE_AP: | |
288 | del_ap_files(sdata); | |
289 | break; | |
290 | case IEEE80211_IF_TYPE_WDS: | |
291 | del_wds_files(sdata); | |
292 | break; | |
293 | case IEEE80211_IF_TYPE_MNTR: | |
294 | del_monitor_files(sdata); | |
295 | break; | |
296 | case IEEE80211_IF_TYPE_VLAN: | |
297 | del_vlan_files(sdata); | |
298 | break; | |
299 | default: | |
300 | break; | |
301 | } | |
302 | } | |
303 | ||
304 | static int notif_registered; | |
305 | ||
306 | void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata) | |
307 | { | |
308 | char buf[10+IFNAMSIZ]; | |
309 | ||
310 | if (!notif_registered) | |
311 | return; | |
312 | ||
313 | sprintf(buf, "netdev:%s", sdata->dev->name); | |
314 | sdata->debugfsdir = debugfs_create_dir(buf, | |
315 | sdata->local->hw.wiphy->debugfsdir); | |
316 | } | |
317 | ||
318 | void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata) | |
319 | { | |
51fb61e7 | 320 | del_files(sdata, sdata->vif.type); |
e9f207f0 JB |
321 | debugfs_remove(sdata->debugfsdir); |
322 | sdata->debugfsdir = NULL; | |
323 | } | |
324 | ||
325 | void ieee80211_debugfs_change_if_type(struct ieee80211_sub_if_data *sdata, | |
326 | int oldtype) | |
327 | { | |
328 | del_files(sdata, oldtype); | |
329 | add_files(sdata); | |
330 | } | |
331 | ||
332 | static int netdev_notify(struct notifier_block * nb, | |
333 | unsigned long state, | |
334 | void *ndev) | |
335 | { | |
336 | struct net_device *dev = ndev; | |
7c8081eb JB |
337 | struct dentry *dir; |
338 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
e9f207f0 JB |
339 | char buf[10+IFNAMSIZ]; |
340 | ||
341 | if (state != NETDEV_CHANGENAME) | |
342 | return 0; | |
343 | ||
344 | if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) | |
345 | return 0; | |
346 | ||
347 | if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) | |
348 | return 0; | |
349 | ||
e9f207f0 | 350 | sprintf(buf, "netdev:%s", dev->name); |
7c8081eb JB |
351 | dir = sdata->debugfsdir; |
352 | if (!debugfs_rename(dir->d_parent, dir, dir->d_parent, buf)) | |
353 | printk(KERN_ERR "mac80211: debugfs: failed to rename debugfs " | |
354 | "dir to %s\n", buf); | |
e9f207f0 JB |
355 | |
356 | return 0; | |
357 | } | |
358 | ||
359 | static struct notifier_block mac80211_debugfs_netdev_notifier = { | |
360 | .notifier_call = netdev_notify, | |
361 | }; | |
362 | ||
363 | void ieee80211_debugfs_netdev_init(void) | |
364 | { | |
365 | int err; | |
366 | ||
367 | err = register_netdevice_notifier(&mac80211_debugfs_netdev_notifier); | |
368 | if (err) { | |
369 | printk(KERN_ERR | |
370 | "mac80211: failed to install netdev notifier," | |
371 | " disabling per-netdev debugfs!\n"); | |
372 | } else | |
373 | notif_registered = 1; | |
374 | } | |
375 | ||
376 | void ieee80211_debugfs_netdev_exit(void) | |
377 | { | |
378 | unregister_netdevice_notifier(&mac80211_debugfs_netdev_notifier); | |
379 | notif_registered = 0; | |
380 | } |