Merge branch 'for-2.6.30' of git://linux-nfs.org/~bfields/linux
[linux-2.6] / net / 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 "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         read_unlock(&dev_base_lock);
37
38         if (ret != -EINVAL)
39                 ret = simple_read_from_buffer(userbuf, count, ppos, buf, ret);
40
41         return ret;
42 }
43
44 #define IEEE80211_IF_FMT(name, field, format_string)                    \
45 static ssize_t ieee80211_if_fmt_##name(                                 \
46         const struct ieee80211_sub_if_data *sdata, char *buf,           \
47         int buflen)                                                     \
48 {                                                                       \
49         return scnprintf(buf, buflen, format_string, sdata->field);     \
50 }
51 #define IEEE80211_IF_FMT_DEC(name, field)                               \
52                 IEEE80211_IF_FMT(name, field, "%d\n")
53 #define IEEE80211_IF_FMT_HEX(name, field)                               \
54                 IEEE80211_IF_FMT(name, field, "%#x\n")
55 #define IEEE80211_IF_FMT_SIZE(name, field)                              \
56                 IEEE80211_IF_FMT(name, field, "%zd\n")
57
58 #define IEEE80211_IF_FMT_ATOMIC(name, field)                            \
59 static ssize_t ieee80211_if_fmt_##name(                                 \
60         const struct ieee80211_sub_if_data *sdata,                      \
61         char *buf, int buflen)                                          \
62 {                                                                       \
63         return scnprintf(buf, buflen, "%d\n", atomic_read(&sdata->field));\
64 }
65
66 #define IEEE80211_IF_FMT_MAC(name, field)                               \
67 static ssize_t ieee80211_if_fmt_##name(                                 \
68         const struct ieee80211_sub_if_data *sdata, char *buf,           \
69         int buflen)                                                     \
70 {                                                                       \
71         return scnprintf(buf, buflen, "%pM\n", sdata->field);           \
72 }
73
74 #define __IEEE80211_IF_FILE(name)                                       \
75 static ssize_t ieee80211_if_read_##name(struct file *file,              \
76                                         char __user *userbuf,           \
77                                         size_t count, loff_t *ppos)     \
78 {                                                                       \
79         return ieee80211_if_read(file->private_data,                    \
80                                  userbuf, count, ppos,                  \
81                                  ieee80211_if_fmt_##name);              \
82 }                                                                       \
83 static const struct file_operations name##_ops = {                      \
84         .read = ieee80211_if_read_##name,                               \
85         .open = mac80211_open_file_generic,                             \
86 }
87
88 #define IEEE80211_IF_FILE(name, field, format)                          \
89                 IEEE80211_IF_FMT_##format(name, field)                  \
90                 __IEEE80211_IF_FILE(name)
91
92 /* common attributes */
93 IEEE80211_IF_FILE(drop_unencrypted, drop_unencrypted, DEC);
94 IEEE80211_IF_FILE(force_unicast_rateidx, force_unicast_rateidx, DEC);
95 IEEE80211_IF_FILE(max_ratectrl_rateidx, max_ratectrl_rateidx, DEC);
96
97 /* STA attributes */
98 IEEE80211_IF_FILE(state, u.mgd.state, DEC);
99 IEEE80211_IF_FILE(bssid, u.mgd.bssid, MAC);
100 IEEE80211_IF_FILE(prev_bssid, u.mgd.prev_bssid, MAC);
101 IEEE80211_IF_FILE(ssid_len, u.mgd.ssid_len, SIZE);
102 IEEE80211_IF_FILE(aid, u.mgd.aid, DEC);
103 IEEE80211_IF_FILE(ap_capab, u.mgd.ap_capab, HEX);
104 IEEE80211_IF_FILE(capab, u.mgd.capab, HEX);
105 IEEE80211_IF_FILE(extra_ie_len, u.mgd.extra_ie_len, SIZE);
106 IEEE80211_IF_FILE(auth_tries, u.mgd.auth_tries, DEC);
107 IEEE80211_IF_FILE(assoc_tries, u.mgd.assoc_tries, DEC);
108 IEEE80211_IF_FILE(auth_algs, u.mgd.auth_algs, HEX);
109 IEEE80211_IF_FILE(auth_alg, u.mgd.auth_alg, DEC);
110 IEEE80211_IF_FILE(auth_transaction, u.mgd.auth_transaction, DEC);
111
112 static 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.mgd.flags & IEEE80211_STA_SSID_SET ? "SSID\n" : "",
117                  sdata->u.mgd.flags & IEEE80211_STA_BSSID_SET ? "BSSID\n" : "",
118                  sdata->u.mgd.flags & IEEE80211_STA_PREV_BSSID_SET ? "prev BSSID\n" : "",
119                  sdata->u.mgd.flags & IEEE80211_STA_AUTHENTICATED ? "AUTH\n" : "",
120                  sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED ? "ASSOC\n" : "",
121                  sdata->u.mgd.flags & IEEE80211_STA_PROBEREQ_POLL ? "PROBEREQ POLL\n" : "",
122                  sdata->vif.bss_conf.use_cts_prot ? "CTS prot\n" : "");
123 }
124 __IEEE80211_IF_FILE(flags);
125
126 /* AP attributes */
127 IEEE80211_IF_FILE(num_sta_ps, u.ap.num_sta_ps, ATOMIC);
128 IEEE80211_IF_FILE(dtim_count, u.ap.dtim_count, DEC);
129
130 static ssize_t ieee80211_if_fmt_num_buffered_multicast(
131         const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
132 {
133         return scnprintf(buf, buflen, "%u\n",
134                          skb_queue_len(&sdata->u.ap.ps_bc_buf));
135 }
136 __IEEE80211_IF_FILE(num_buffered_multicast);
137
138 /* WDS attributes */
139 IEEE80211_IF_FILE(peer, u.wds.remote_addr, MAC);
140
141 #ifdef CONFIG_MAC80211_MESH
142 /* Mesh stats attributes */
143 IEEE80211_IF_FILE(fwded_frames, u.mesh.mshstats.fwded_frames, DEC);
144 IEEE80211_IF_FILE(dropped_frames_ttl, u.mesh.mshstats.dropped_frames_ttl, DEC);
145 IEEE80211_IF_FILE(dropped_frames_no_route,
146                 u.mesh.mshstats.dropped_frames_no_route, DEC);
147 IEEE80211_IF_FILE(estab_plinks, u.mesh.mshstats.estab_plinks, ATOMIC);
148
149 /* Mesh parameters */
150 IEEE80211_IF_FILE(dot11MeshMaxRetries,
151                 u.mesh.mshcfg.dot11MeshMaxRetries, DEC);
152 IEEE80211_IF_FILE(dot11MeshRetryTimeout,
153                 u.mesh.mshcfg.dot11MeshRetryTimeout, DEC);
154 IEEE80211_IF_FILE(dot11MeshConfirmTimeout,
155                 u.mesh.mshcfg.dot11MeshConfirmTimeout, DEC);
156 IEEE80211_IF_FILE(dot11MeshHoldingTimeout,
157                 u.mesh.mshcfg.dot11MeshHoldingTimeout, DEC);
158 IEEE80211_IF_FILE(dot11MeshTTL, u.mesh.mshcfg.dot11MeshTTL, DEC);
159 IEEE80211_IF_FILE(auto_open_plinks, u.mesh.mshcfg.auto_open_plinks, DEC);
160 IEEE80211_IF_FILE(dot11MeshMaxPeerLinks,
161                 u.mesh.mshcfg.dot11MeshMaxPeerLinks, DEC);
162 IEEE80211_IF_FILE(dot11MeshHWMPactivePathTimeout,
163                 u.mesh.mshcfg.dot11MeshHWMPactivePathTimeout, DEC);
164 IEEE80211_IF_FILE(dot11MeshHWMPpreqMinInterval,
165                 u.mesh.mshcfg.dot11MeshHWMPpreqMinInterval, DEC);
166 IEEE80211_IF_FILE(dot11MeshHWMPnetDiameterTraversalTime,
167                 u.mesh.mshcfg.dot11MeshHWMPnetDiameterTraversalTime, DEC);
168 IEEE80211_IF_FILE(dot11MeshHWMPmaxPREQretries,
169                 u.mesh.mshcfg.dot11MeshHWMPmaxPREQretries, DEC);
170 IEEE80211_IF_FILE(path_refresh_time,
171                 u.mesh.mshcfg.path_refresh_time, DEC);
172 IEEE80211_IF_FILE(min_discovery_timeout,
173                 u.mesh.mshcfg.min_discovery_timeout, DEC);
174 #endif
175
176
177 #define DEBUGFS_ADD(name, type)\
178         sdata->debugfs.type.name = debugfs_create_file(#name, 0400,\
179                 sdata->debugfsdir, sdata, &name##_ops);
180
181 static void add_sta_files(struct ieee80211_sub_if_data *sdata)
182 {
183         DEBUGFS_ADD(drop_unencrypted, sta);
184         DEBUGFS_ADD(force_unicast_rateidx, sta);
185         DEBUGFS_ADD(max_ratectrl_rateidx, sta);
186
187         DEBUGFS_ADD(state, sta);
188         DEBUGFS_ADD(bssid, sta);
189         DEBUGFS_ADD(prev_bssid, sta);
190         DEBUGFS_ADD(ssid_len, sta);
191         DEBUGFS_ADD(aid, sta);
192         DEBUGFS_ADD(ap_capab, sta);
193         DEBUGFS_ADD(capab, sta);
194         DEBUGFS_ADD(extra_ie_len, sta);
195         DEBUGFS_ADD(auth_tries, sta);
196         DEBUGFS_ADD(assoc_tries, sta);
197         DEBUGFS_ADD(auth_algs, sta);
198         DEBUGFS_ADD(auth_alg, sta);
199         DEBUGFS_ADD(auth_transaction, sta);
200         DEBUGFS_ADD(flags, sta);
201 }
202
203 static void add_ap_files(struct ieee80211_sub_if_data *sdata)
204 {
205         DEBUGFS_ADD(drop_unencrypted, ap);
206         DEBUGFS_ADD(force_unicast_rateidx, ap);
207         DEBUGFS_ADD(max_ratectrl_rateidx, ap);
208
209         DEBUGFS_ADD(num_sta_ps, ap);
210         DEBUGFS_ADD(dtim_count, ap);
211         DEBUGFS_ADD(num_buffered_multicast, ap);
212 }
213
214 static void add_wds_files(struct ieee80211_sub_if_data *sdata)
215 {
216         DEBUGFS_ADD(drop_unencrypted, wds);
217         DEBUGFS_ADD(force_unicast_rateidx, wds);
218         DEBUGFS_ADD(max_ratectrl_rateidx, wds);
219
220         DEBUGFS_ADD(peer, wds);
221 }
222
223 static void add_vlan_files(struct ieee80211_sub_if_data *sdata)
224 {
225         DEBUGFS_ADD(drop_unencrypted, vlan);
226         DEBUGFS_ADD(force_unicast_rateidx, vlan);
227         DEBUGFS_ADD(max_ratectrl_rateidx, vlan);
228 }
229
230 static void add_monitor_files(struct ieee80211_sub_if_data *sdata)
231 {
232 }
233
234 #ifdef CONFIG_MAC80211_MESH
235 #define MESHSTATS_ADD(name)\
236         sdata->mesh_stats.name = debugfs_create_file(#name, 0400,\
237                 sdata->mesh_stats_dir, sdata, &name##_ops);
238
239 static void add_mesh_stats(struct ieee80211_sub_if_data *sdata)
240 {
241         sdata->mesh_stats_dir = debugfs_create_dir("mesh_stats",
242                                 sdata->debugfsdir);
243         MESHSTATS_ADD(fwded_frames);
244         MESHSTATS_ADD(dropped_frames_ttl);
245         MESHSTATS_ADD(dropped_frames_no_route);
246         MESHSTATS_ADD(estab_plinks);
247 }
248
249 #define MESHPARAMS_ADD(name)\
250         sdata->mesh_config.name = debugfs_create_file(#name, 0600,\
251                 sdata->mesh_config_dir, sdata, &name##_ops);
252
253 static void add_mesh_config(struct ieee80211_sub_if_data *sdata)
254 {
255         sdata->mesh_config_dir = debugfs_create_dir("mesh_config",
256                                 sdata->debugfsdir);
257         MESHPARAMS_ADD(dot11MeshMaxRetries);
258         MESHPARAMS_ADD(dot11MeshRetryTimeout);
259         MESHPARAMS_ADD(dot11MeshConfirmTimeout);
260         MESHPARAMS_ADD(dot11MeshHoldingTimeout);
261         MESHPARAMS_ADD(dot11MeshTTL);
262         MESHPARAMS_ADD(auto_open_plinks);
263         MESHPARAMS_ADD(dot11MeshMaxPeerLinks);
264         MESHPARAMS_ADD(dot11MeshHWMPactivePathTimeout);
265         MESHPARAMS_ADD(dot11MeshHWMPpreqMinInterval);
266         MESHPARAMS_ADD(dot11MeshHWMPnetDiameterTraversalTime);
267         MESHPARAMS_ADD(dot11MeshHWMPmaxPREQretries);
268         MESHPARAMS_ADD(path_refresh_time);
269         MESHPARAMS_ADD(min_discovery_timeout);
270 }
271 #endif
272
273 static void add_files(struct ieee80211_sub_if_data *sdata)
274 {
275         if (!sdata->debugfsdir)
276                 return;
277
278         switch (sdata->vif.type) {
279         case NL80211_IFTYPE_MESH_POINT:
280 #ifdef CONFIG_MAC80211_MESH
281                 add_mesh_stats(sdata);
282                 add_mesh_config(sdata);
283 #endif
284                 break;
285         case NL80211_IFTYPE_STATION:
286                 add_sta_files(sdata);
287                 break;
288         case NL80211_IFTYPE_ADHOC:
289                 /* XXX */
290                 break;
291         case NL80211_IFTYPE_AP:
292                 add_ap_files(sdata);
293                 break;
294         case NL80211_IFTYPE_WDS:
295                 add_wds_files(sdata);
296                 break;
297         case NL80211_IFTYPE_MONITOR:
298                 add_monitor_files(sdata);
299                 break;
300         case NL80211_IFTYPE_AP_VLAN:
301                 add_vlan_files(sdata);
302                 break;
303         default:
304                 break;
305         }
306 }
307
308 #define DEBUGFS_DEL(name, type)                                 \
309         do {                                                    \
310                 debugfs_remove(sdata->debugfs.type.name);       \
311                 sdata->debugfs.type.name = NULL;                \
312         } while (0)
313
314 static void del_sta_files(struct ieee80211_sub_if_data *sdata)
315 {
316         DEBUGFS_DEL(drop_unencrypted, sta);
317         DEBUGFS_DEL(force_unicast_rateidx, sta);
318         DEBUGFS_DEL(max_ratectrl_rateidx, sta);
319
320         DEBUGFS_DEL(state, sta);
321         DEBUGFS_DEL(bssid, sta);
322         DEBUGFS_DEL(prev_bssid, sta);
323         DEBUGFS_DEL(ssid_len, sta);
324         DEBUGFS_DEL(aid, sta);
325         DEBUGFS_DEL(ap_capab, sta);
326         DEBUGFS_DEL(capab, sta);
327         DEBUGFS_DEL(extra_ie_len, sta);
328         DEBUGFS_DEL(auth_tries, sta);
329         DEBUGFS_DEL(assoc_tries, sta);
330         DEBUGFS_DEL(auth_algs, sta);
331         DEBUGFS_DEL(auth_alg, sta);
332         DEBUGFS_DEL(auth_transaction, sta);
333         DEBUGFS_DEL(flags, sta);
334 }
335
336 static void del_ap_files(struct ieee80211_sub_if_data *sdata)
337 {
338         DEBUGFS_DEL(drop_unencrypted, ap);
339         DEBUGFS_DEL(force_unicast_rateidx, ap);
340         DEBUGFS_DEL(max_ratectrl_rateidx, ap);
341
342         DEBUGFS_DEL(num_sta_ps, ap);
343         DEBUGFS_DEL(dtim_count, ap);
344         DEBUGFS_DEL(num_buffered_multicast, ap);
345 }
346
347 static void del_wds_files(struct ieee80211_sub_if_data *sdata)
348 {
349         DEBUGFS_DEL(drop_unencrypted, wds);
350         DEBUGFS_DEL(force_unicast_rateidx, wds);
351         DEBUGFS_DEL(max_ratectrl_rateidx, wds);
352
353         DEBUGFS_DEL(peer, wds);
354 }
355
356 static void del_vlan_files(struct ieee80211_sub_if_data *sdata)
357 {
358         DEBUGFS_DEL(drop_unencrypted, vlan);
359         DEBUGFS_DEL(force_unicast_rateidx, vlan);
360         DEBUGFS_DEL(max_ratectrl_rateidx, vlan);
361 }
362
363 static void del_monitor_files(struct ieee80211_sub_if_data *sdata)
364 {
365 }
366
367 #ifdef CONFIG_MAC80211_MESH
368 #define MESHSTATS_DEL(name)                     \
369         do {                                            \
370                 debugfs_remove(sdata->mesh_stats.name); \
371                 sdata->mesh_stats.name = NULL;          \
372         } while (0)
373
374 static void del_mesh_stats(struct ieee80211_sub_if_data *sdata)
375 {
376         MESHSTATS_DEL(fwded_frames);
377         MESHSTATS_DEL(dropped_frames_ttl);
378         MESHSTATS_DEL(dropped_frames_no_route);
379         MESHSTATS_DEL(estab_plinks);
380         debugfs_remove(sdata->mesh_stats_dir);
381         sdata->mesh_stats_dir = NULL;
382 }
383
384 #define MESHPARAMS_DEL(name)                    \
385         do {                                            \
386                 debugfs_remove(sdata->mesh_config.name);        \
387                 sdata->mesh_config.name = NULL;         \
388         } while (0)
389
390 static void del_mesh_config(struct ieee80211_sub_if_data *sdata)
391 {
392         MESHPARAMS_DEL(dot11MeshMaxRetries);
393         MESHPARAMS_DEL(dot11MeshRetryTimeout);
394         MESHPARAMS_DEL(dot11MeshConfirmTimeout);
395         MESHPARAMS_DEL(dot11MeshHoldingTimeout);
396         MESHPARAMS_DEL(dot11MeshTTL);
397         MESHPARAMS_DEL(auto_open_plinks);
398         MESHPARAMS_DEL(dot11MeshMaxPeerLinks);
399         MESHPARAMS_DEL(dot11MeshHWMPactivePathTimeout);
400         MESHPARAMS_DEL(dot11MeshHWMPpreqMinInterval);
401         MESHPARAMS_DEL(dot11MeshHWMPnetDiameterTraversalTime);
402         MESHPARAMS_DEL(dot11MeshHWMPmaxPREQretries);
403         MESHPARAMS_DEL(path_refresh_time);
404         MESHPARAMS_DEL(min_discovery_timeout);
405         debugfs_remove(sdata->mesh_config_dir);
406         sdata->mesh_config_dir = NULL;
407 }
408 #endif
409
410 static void del_files(struct ieee80211_sub_if_data *sdata)
411 {
412         if (!sdata->debugfsdir)
413                 return;
414
415         switch (sdata->vif.type) {
416         case NL80211_IFTYPE_MESH_POINT:
417 #ifdef CONFIG_MAC80211_MESH
418                 del_mesh_stats(sdata);
419                 del_mesh_config(sdata);
420 #endif
421                 break;
422         case NL80211_IFTYPE_STATION:
423                 del_sta_files(sdata);
424                 break;
425         case NL80211_IFTYPE_ADHOC:
426                 /* XXX */
427                 break;
428         case NL80211_IFTYPE_AP:
429                 del_ap_files(sdata);
430                 break;
431         case NL80211_IFTYPE_WDS:
432                 del_wds_files(sdata);
433                 break;
434         case NL80211_IFTYPE_MONITOR:
435                 del_monitor_files(sdata);
436                 break;
437         case NL80211_IFTYPE_AP_VLAN:
438                 del_vlan_files(sdata);
439                 break;
440         default:
441                 break;
442         }
443 }
444
445 static int notif_registered;
446
447 void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata)
448 {
449         char buf[10+IFNAMSIZ];
450
451         if (!notif_registered)
452                 return;
453
454         sprintf(buf, "netdev:%s", sdata->dev->name);
455         sdata->debugfsdir = debugfs_create_dir(buf,
456                 sdata->local->hw.wiphy->debugfsdir);
457         add_files(sdata);
458 }
459
460 void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata)
461 {
462         del_files(sdata);
463         debugfs_remove(sdata->debugfsdir);
464         sdata->debugfsdir = NULL;
465 }
466
467 static int netdev_notify(struct notifier_block *nb,
468                          unsigned long state,
469                          void *ndev)
470 {
471         struct net_device *dev = ndev;
472         struct dentry *dir;
473         struct ieee80211_sub_if_data *sdata;
474         char buf[10+IFNAMSIZ];
475
476         if (state != NETDEV_CHANGENAME)
477                 return 0;
478
479         if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
480                 return 0;
481
482         if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
483                 return 0;
484
485         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
486
487         dir = sdata->debugfsdir;
488
489         if (!dir)
490                 return 0;
491
492         sprintf(buf, "netdev:%s", dev->name);
493         if (!debugfs_rename(dir->d_parent, dir, dir->d_parent, buf))
494                 printk(KERN_ERR "mac80211: debugfs: failed to rename debugfs "
495                        "dir to %s\n", buf);
496
497         return 0;
498 }
499
500 static struct notifier_block mac80211_debugfs_netdev_notifier = {
501         .notifier_call = netdev_notify,
502 };
503
504 void ieee80211_debugfs_netdev_init(void)
505 {
506         int err;
507
508         err = register_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
509         if (err) {
510                 printk(KERN_ERR
511                        "mac80211: failed to install netdev notifier,"
512                        " disabling per-netdev debugfs!\n");
513         } else
514                 notif_registered = 1;
515 }
516
517 void ieee80211_debugfs_netdev_exit(void)
518 {
519         unregister_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
520         notif_registered = 0;
521 }