Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
[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/IBSS attributes */
98 IEEE80211_IF_FILE(state, u.sta.state, DEC);
99 IEEE80211_IF_FILE(bssid, u.sta.bssid, MAC);
100 IEEE80211_IF_FILE(prev_bssid, u.sta.prev_bssid, MAC);
101 IEEE80211_IF_FILE(ssid_len, u.sta.ssid_len, SIZE);
102 IEEE80211_IF_FILE(aid, u.sta.aid, DEC);
103 IEEE80211_IF_FILE(ap_capab, u.sta.ap_capab, HEX);
104 IEEE80211_IF_FILE(capab, u.sta.capab, HEX);
105 IEEE80211_IF_FILE(extra_ie_len, u.sta.extra_ie_len, SIZE);
106 IEEE80211_IF_FILE(auth_tries, u.sta.auth_tries, DEC);
107 IEEE80211_IF_FILE(assoc_tries, u.sta.assoc_tries, DEC);
108 IEEE80211_IF_FILE(auth_algs, u.sta.auth_algs, HEX);
109 IEEE80211_IF_FILE(auth_alg, u.sta.auth_alg, DEC);
110 IEEE80211_IF_FILE(auth_transaction, u.sta.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.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->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         case NL80211_IFTYPE_ADHOC:
287                 add_sta_files(sdata);
288                 break;
289         case NL80211_IFTYPE_AP:
290                 add_ap_files(sdata);
291                 break;
292         case NL80211_IFTYPE_WDS:
293                 add_wds_files(sdata);
294                 break;
295         case NL80211_IFTYPE_MONITOR:
296                 add_monitor_files(sdata);
297                 break;
298         case NL80211_IFTYPE_AP_VLAN:
299                 add_vlan_files(sdata);
300                 break;
301         default:
302                 break;
303         }
304 }
305
306 #define DEBUGFS_DEL(name, type)                                 \
307         do {                                                    \
308                 debugfs_remove(sdata->debugfs.type.name);       \
309                 sdata->debugfs.type.name = NULL;                \
310         } while (0)
311
312 static void del_sta_files(struct ieee80211_sub_if_data *sdata)
313 {
314         DEBUGFS_DEL(drop_unencrypted, sta);
315         DEBUGFS_DEL(force_unicast_rateidx, sta);
316         DEBUGFS_DEL(max_ratectrl_rateidx, sta);
317
318         DEBUGFS_DEL(state, sta);
319         DEBUGFS_DEL(bssid, sta);
320         DEBUGFS_DEL(prev_bssid, sta);
321         DEBUGFS_DEL(ssid_len, sta);
322         DEBUGFS_DEL(aid, sta);
323         DEBUGFS_DEL(ap_capab, sta);
324         DEBUGFS_DEL(capab, sta);
325         DEBUGFS_DEL(extra_ie_len, sta);
326         DEBUGFS_DEL(auth_tries, sta);
327         DEBUGFS_DEL(assoc_tries, sta);
328         DEBUGFS_DEL(auth_algs, sta);
329         DEBUGFS_DEL(auth_alg, sta);
330         DEBUGFS_DEL(auth_transaction, sta);
331         DEBUGFS_DEL(flags, sta);
332 }
333
334 static void del_ap_files(struct ieee80211_sub_if_data *sdata)
335 {
336         DEBUGFS_DEL(drop_unencrypted, ap);
337         DEBUGFS_DEL(force_unicast_rateidx, ap);
338         DEBUGFS_DEL(max_ratectrl_rateidx, ap);
339
340         DEBUGFS_DEL(num_sta_ps, ap);
341         DEBUGFS_DEL(dtim_count, ap);
342         DEBUGFS_DEL(num_buffered_multicast, ap);
343 }
344
345 static void del_wds_files(struct ieee80211_sub_if_data *sdata)
346 {
347         DEBUGFS_DEL(drop_unencrypted, wds);
348         DEBUGFS_DEL(force_unicast_rateidx, wds);
349         DEBUGFS_DEL(max_ratectrl_rateidx, wds);
350
351         DEBUGFS_DEL(peer, wds);
352 }
353
354 static void del_vlan_files(struct ieee80211_sub_if_data *sdata)
355 {
356         DEBUGFS_DEL(drop_unencrypted, vlan);
357         DEBUGFS_DEL(force_unicast_rateidx, vlan);
358         DEBUGFS_DEL(max_ratectrl_rateidx, vlan);
359 }
360
361 static void del_monitor_files(struct ieee80211_sub_if_data *sdata)
362 {
363 }
364
365 #ifdef CONFIG_MAC80211_MESH
366 #define MESHSTATS_DEL(name)                     \
367         do {                                            \
368                 debugfs_remove(sdata->mesh_stats.name); \
369                 sdata->mesh_stats.name = NULL;          \
370         } while (0)
371
372 static void del_mesh_stats(struct ieee80211_sub_if_data *sdata)
373 {
374         MESHSTATS_DEL(fwded_frames);
375         MESHSTATS_DEL(dropped_frames_ttl);
376         MESHSTATS_DEL(dropped_frames_no_route);
377         MESHSTATS_DEL(estab_plinks);
378         debugfs_remove(sdata->mesh_stats_dir);
379         sdata->mesh_stats_dir = NULL;
380 }
381
382 #define MESHPARAMS_DEL(name)                    \
383         do {                                            \
384                 debugfs_remove(sdata->mesh_config.name);        \
385                 sdata->mesh_config.name = NULL;         \
386         } while (0)
387
388 static void del_mesh_config(struct ieee80211_sub_if_data *sdata)
389 {
390         MESHPARAMS_DEL(dot11MeshMaxRetries);
391         MESHPARAMS_DEL(dot11MeshRetryTimeout);
392         MESHPARAMS_DEL(dot11MeshConfirmTimeout);
393         MESHPARAMS_DEL(dot11MeshHoldingTimeout);
394         MESHPARAMS_DEL(dot11MeshTTL);
395         MESHPARAMS_DEL(auto_open_plinks);
396         MESHPARAMS_DEL(dot11MeshMaxPeerLinks);
397         MESHPARAMS_DEL(dot11MeshHWMPactivePathTimeout);
398         MESHPARAMS_DEL(dot11MeshHWMPpreqMinInterval);
399         MESHPARAMS_DEL(dot11MeshHWMPnetDiameterTraversalTime);
400         MESHPARAMS_DEL(dot11MeshHWMPmaxPREQretries);
401         MESHPARAMS_DEL(path_refresh_time);
402         MESHPARAMS_DEL(min_discovery_timeout);
403         debugfs_remove(sdata->mesh_config_dir);
404         sdata->mesh_config_dir = NULL;
405 }
406 #endif
407
408 static void del_files(struct ieee80211_sub_if_data *sdata)
409 {
410         if (!sdata->debugfsdir)
411                 return;
412
413         switch (sdata->vif.type) {
414         case NL80211_IFTYPE_MESH_POINT:
415 #ifdef CONFIG_MAC80211_MESH
416                 del_mesh_stats(sdata);
417                 del_mesh_config(sdata);
418 #endif
419                 break;
420         case NL80211_IFTYPE_STATION:
421         case NL80211_IFTYPE_ADHOC:
422                 del_sta_files(sdata);
423                 break;
424         case NL80211_IFTYPE_AP:
425                 del_ap_files(sdata);
426                 break;
427         case NL80211_IFTYPE_WDS:
428                 del_wds_files(sdata);
429                 break;
430         case NL80211_IFTYPE_MONITOR:
431                 del_monitor_files(sdata);
432                 break;
433         case NL80211_IFTYPE_AP_VLAN:
434                 del_vlan_files(sdata);
435                 break;
436         default:
437                 break;
438         }
439 }
440
441 static int notif_registered;
442
443 void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata)
444 {
445         char buf[10+IFNAMSIZ];
446
447         if (!notif_registered)
448                 return;
449
450         sprintf(buf, "netdev:%s", sdata->dev->name);
451         sdata->debugfsdir = debugfs_create_dir(buf,
452                 sdata->local->hw.wiphy->debugfsdir);
453         add_files(sdata);
454 }
455
456 void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata)
457 {
458         del_files(sdata);
459         debugfs_remove(sdata->debugfsdir);
460         sdata->debugfsdir = NULL;
461 }
462
463 static int netdev_notify(struct notifier_block *nb,
464                          unsigned long state,
465                          void *ndev)
466 {
467         struct net_device *dev = ndev;
468         struct dentry *dir;
469         struct ieee80211_sub_if_data *sdata;
470         char buf[10+IFNAMSIZ];
471
472         if (state != NETDEV_CHANGENAME)
473                 return 0;
474
475         if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
476                 return 0;
477
478         if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
479                 return 0;
480
481         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
482
483         dir = sdata->debugfsdir;
484
485         if (!dir)
486                 return 0;
487
488         sprintf(buf, "netdev:%s", dev->name);
489         if (!debugfs_rename(dir->d_parent, dir, dir->d_parent, buf))
490                 printk(KERN_ERR "mac80211: debugfs: failed to rename debugfs "
491                        "dir to %s\n", buf);
492
493         return 0;
494 }
495
496 static struct notifier_block mac80211_debugfs_netdev_notifier = {
497         .notifier_call = netdev_notify,
498 };
499
500 void ieee80211_debugfs_netdev_init(void)
501 {
502         int err;
503
504         err = register_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
505         if (err) {
506                 printk(KERN_ERR
507                        "mac80211: failed to install netdev notifier,"
508                        " disabling per-netdev debugfs!\n");
509         } else
510                 notif_registered = 1;
511 }
512
513 void ieee80211_debugfs_netdev_exit(void)
514 {
515         unregister_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
516         notif_registered = 0;
517 }