mac80211: New stat counters for multicast and unicast forwarded frames
[pandora-kernel.git] / 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(bssid, u.mgd.bssid, MAC);
99 IEEE80211_IF_FILE(aid, u.mgd.aid, DEC);
100 IEEE80211_IF_FILE(capab, u.mgd.capab, HEX);
101
102 /* AP attributes */
103 IEEE80211_IF_FILE(num_sta_ps, u.ap.num_sta_ps, ATOMIC);
104 IEEE80211_IF_FILE(dtim_count, u.ap.dtim_count, DEC);
105
106 static ssize_t ieee80211_if_fmt_num_buffered_multicast(
107         const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
108 {
109         return scnprintf(buf, buflen, "%u\n",
110                          skb_queue_len(&sdata->u.ap.ps_bc_buf));
111 }
112 __IEEE80211_IF_FILE(num_buffered_multicast);
113
114 /* WDS attributes */
115 IEEE80211_IF_FILE(peer, u.wds.remote_addr, MAC);
116
117 #ifdef CONFIG_MAC80211_MESH
118 /* Mesh stats attributes */
119 IEEE80211_IF_FILE(fwded_mcast, u.mesh.mshstats.fwded_mcast, DEC);
120 IEEE80211_IF_FILE(fwded_unicast, u.mesh.mshstats.fwded_unicast, DEC);
121 IEEE80211_IF_FILE(fwded_frames, u.mesh.mshstats.fwded_frames, DEC);
122 IEEE80211_IF_FILE(dropped_frames_ttl, u.mesh.mshstats.dropped_frames_ttl, DEC);
123 IEEE80211_IF_FILE(dropped_frames_no_route,
124                 u.mesh.mshstats.dropped_frames_no_route, DEC);
125 IEEE80211_IF_FILE(estab_plinks, u.mesh.mshstats.estab_plinks, ATOMIC);
126
127 /* Mesh parameters */
128 IEEE80211_IF_FILE(dot11MeshMaxRetries,
129                 u.mesh.mshcfg.dot11MeshMaxRetries, DEC);
130 IEEE80211_IF_FILE(dot11MeshRetryTimeout,
131                 u.mesh.mshcfg.dot11MeshRetryTimeout, DEC);
132 IEEE80211_IF_FILE(dot11MeshConfirmTimeout,
133                 u.mesh.mshcfg.dot11MeshConfirmTimeout, DEC);
134 IEEE80211_IF_FILE(dot11MeshHoldingTimeout,
135                 u.mesh.mshcfg.dot11MeshHoldingTimeout, DEC);
136 IEEE80211_IF_FILE(dot11MeshTTL, u.mesh.mshcfg.dot11MeshTTL, DEC);
137 IEEE80211_IF_FILE(auto_open_plinks, u.mesh.mshcfg.auto_open_plinks, DEC);
138 IEEE80211_IF_FILE(dot11MeshMaxPeerLinks,
139                 u.mesh.mshcfg.dot11MeshMaxPeerLinks, DEC);
140 IEEE80211_IF_FILE(dot11MeshHWMPactivePathTimeout,
141                 u.mesh.mshcfg.dot11MeshHWMPactivePathTimeout, DEC);
142 IEEE80211_IF_FILE(dot11MeshHWMPpreqMinInterval,
143                 u.mesh.mshcfg.dot11MeshHWMPpreqMinInterval, DEC);
144 IEEE80211_IF_FILE(dot11MeshHWMPnetDiameterTraversalTime,
145                 u.mesh.mshcfg.dot11MeshHWMPnetDiameterTraversalTime, DEC);
146 IEEE80211_IF_FILE(dot11MeshHWMPmaxPREQretries,
147                 u.mesh.mshcfg.dot11MeshHWMPmaxPREQretries, DEC);
148 IEEE80211_IF_FILE(path_refresh_time,
149                 u.mesh.mshcfg.path_refresh_time, DEC);
150 IEEE80211_IF_FILE(min_discovery_timeout,
151                 u.mesh.mshcfg.min_discovery_timeout, DEC);
152 #endif
153
154
155 #define DEBUGFS_ADD(name, type)\
156         sdata->debugfs.type.name = debugfs_create_file(#name, 0400,\
157                 sdata->debugfsdir, sdata, &name##_ops);
158
159 static void add_sta_files(struct ieee80211_sub_if_data *sdata)
160 {
161         DEBUGFS_ADD(drop_unencrypted, sta);
162         DEBUGFS_ADD(force_unicast_rateidx, sta);
163         DEBUGFS_ADD(max_ratectrl_rateidx, sta);
164
165         DEBUGFS_ADD(bssid, sta);
166         DEBUGFS_ADD(aid, sta);
167         DEBUGFS_ADD(capab, sta);
168 }
169
170 static void add_ap_files(struct ieee80211_sub_if_data *sdata)
171 {
172         DEBUGFS_ADD(drop_unencrypted, ap);
173         DEBUGFS_ADD(force_unicast_rateidx, ap);
174         DEBUGFS_ADD(max_ratectrl_rateidx, ap);
175
176         DEBUGFS_ADD(num_sta_ps, ap);
177         DEBUGFS_ADD(dtim_count, ap);
178         DEBUGFS_ADD(num_buffered_multicast, ap);
179 }
180
181 static void add_wds_files(struct ieee80211_sub_if_data *sdata)
182 {
183         DEBUGFS_ADD(drop_unencrypted, wds);
184         DEBUGFS_ADD(force_unicast_rateidx, wds);
185         DEBUGFS_ADD(max_ratectrl_rateidx, wds);
186
187         DEBUGFS_ADD(peer, wds);
188 }
189
190 static void add_vlan_files(struct ieee80211_sub_if_data *sdata)
191 {
192         DEBUGFS_ADD(drop_unencrypted, vlan);
193         DEBUGFS_ADD(force_unicast_rateidx, vlan);
194         DEBUGFS_ADD(max_ratectrl_rateidx, vlan);
195 }
196
197 static void add_monitor_files(struct ieee80211_sub_if_data *sdata)
198 {
199 }
200
201 #ifdef CONFIG_MAC80211_MESH
202 #define MESHSTATS_ADD(name)\
203         sdata->mesh_stats.name = debugfs_create_file(#name, 0400,\
204                 sdata->mesh_stats_dir, sdata, &name##_ops);
205
206 static void add_mesh_stats(struct ieee80211_sub_if_data *sdata)
207 {
208         sdata->mesh_stats_dir = debugfs_create_dir("mesh_stats",
209                                 sdata->debugfsdir);
210         MESHSTATS_ADD(fwded_mcast);
211         MESHSTATS_ADD(fwded_unicast);
212         MESHSTATS_ADD(fwded_frames);
213         MESHSTATS_ADD(dropped_frames_ttl);
214         MESHSTATS_ADD(dropped_frames_no_route);
215         MESHSTATS_ADD(estab_plinks);
216 }
217
218 #define MESHPARAMS_ADD(name)\
219         sdata->mesh_config.name = debugfs_create_file(#name, 0600,\
220                 sdata->mesh_config_dir, sdata, &name##_ops);
221
222 static void add_mesh_config(struct ieee80211_sub_if_data *sdata)
223 {
224         sdata->mesh_config_dir = debugfs_create_dir("mesh_config",
225                                 sdata->debugfsdir);
226         MESHPARAMS_ADD(dot11MeshMaxRetries);
227         MESHPARAMS_ADD(dot11MeshRetryTimeout);
228         MESHPARAMS_ADD(dot11MeshConfirmTimeout);
229         MESHPARAMS_ADD(dot11MeshHoldingTimeout);
230         MESHPARAMS_ADD(dot11MeshTTL);
231         MESHPARAMS_ADD(auto_open_plinks);
232         MESHPARAMS_ADD(dot11MeshMaxPeerLinks);
233         MESHPARAMS_ADD(dot11MeshHWMPactivePathTimeout);
234         MESHPARAMS_ADD(dot11MeshHWMPpreqMinInterval);
235         MESHPARAMS_ADD(dot11MeshHWMPnetDiameterTraversalTime);
236         MESHPARAMS_ADD(dot11MeshHWMPmaxPREQretries);
237         MESHPARAMS_ADD(path_refresh_time);
238         MESHPARAMS_ADD(min_discovery_timeout);
239 }
240 #endif
241
242 static void add_files(struct ieee80211_sub_if_data *sdata)
243 {
244         if (!sdata->debugfsdir)
245                 return;
246
247         switch (sdata->vif.type) {
248         case NL80211_IFTYPE_MESH_POINT:
249 #ifdef CONFIG_MAC80211_MESH
250                 add_mesh_stats(sdata);
251                 add_mesh_config(sdata);
252 #endif
253                 break;
254         case NL80211_IFTYPE_STATION:
255                 add_sta_files(sdata);
256                 break;
257         case NL80211_IFTYPE_ADHOC:
258                 /* XXX */
259                 break;
260         case NL80211_IFTYPE_AP:
261                 add_ap_files(sdata);
262                 break;
263         case NL80211_IFTYPE_WDS:
264                 add_wds_files(sdata);
265                 break;
266         case NL80211_IFTYPE_MONITOR:
267                 add_monitor_files(sdata);
268                 break;
269         case NL80211_IFTYPE_AP_VLAN:
270                 add_vlan_files(sdata);
271                 break;
272         default:
273                 break;
274         }
275 }
276
277 #define DEBUGFS_DEL(name, type)                                 \
278         do {                                                    \
279                 debugfs_remove(sdata->debugfs.type.name);       \
280                 sdata->debugfs.type.name = NULL;                \
281         } while (0)
282
283 static void del_sta_files(struct ieee80211_sub_if_data *sdata)
284 {
285         DEBUGFS_DEL(drop_unencrypted, sta);
286         DEBUGFS_DEL(force_unicast_rateidx, sta);
287         DEBUGFS_DEL(max_ratectrl_rateidx, sta);
288
289         DEBUGFS_DEL(bssid, sta);
290         DEBUGFS_DEL(aid, sta);
291         DEBUGFS_DEL(capab, sta);
292 }
293
294 static void del_ap_files(struct ieee80211_sub_if_data *sdata)
295 {
296         DEBUGFS_DEL(drop_unencrypted, ap);
297         DEBUGFS_DEL(force_unicast_rateidx, ap);
298         DEBUGFS_DEL(max_ratectrl_rateidx, ap);
299
300         DEBUGFS_DEL(num_sta_ps, ap);
301         DEBUGFS_DEL(dtim_count, ap);
302         DEBUGFS_DEL(num_buffered_multicast, ap);
303 }
304
305 static void del_wds_files(struct ieee80211_sub_if_data *sdata)
306 {
307         DEBUGFS_DEL(drop_unencrypted, wds);
308         DEBUGFS_DEL(force_unicast_rateidx, wds);
309         DEBUGFS_DEL(max_ratectrl_rateidx, wds);
310
311         DEBUGFS_DEL(peer, wds);
312 }
313
314 static void del_vlan_files(struct ieee80211_sub_if_data *sdata)
315 {
316         DEBUGFS_DEL(drop_unencrypted, vlan);
317         DEBUGFS_DEL(force_unicast_rateidx, vlan);
318         DEBUGFS_DEL(max_ratectrl_rateidx, vlan);
319 }
320
321 static void del_monitor_files(struct ieee80211_sub_if_data *sdata)
322 {
323 }
324
325 #ifdef CONFIG_MAC80211_MESH
326 #define MESHSTATS_DEL(name)                     \
327         do {                                            \
328                 debugfs_remove(sdata->mesh_stats.name); \
329                 sdata->mesh_stats.name = NULL;          \
330         } while (0)
331
332 static void del_mesh_stats(struct ieee80211_sub_if_data *sdata)
333 {
334         MESHSTATS_DEL(fwded_mcast);
335         MESHSTATS_DEL(fwded_unicast);
336         MESHSTATS_DEL(fwded_frames);
337         MESHSTATS_DEL(dropped_frames_ttl);
338         MESHSTATS_DEL(dropped_frames_no_route);
339         MESHSTATS_DEL(estab_plinks);
340         debugfs_remove(sdata->mesh_stats_dir);
341         sdata->mesh_stats_dir = NULL;
342 }
343
344 #define MESHPARAMS_DEL(name)                    \
345         do {                                            \
346                 debugfs_remove(sdata->mesh_config.name);        \
347                 sdata->mesh_config.name = NULL;         \
348         } while (0)
349
350 static void del_mesh_config(struct ieee80211_sub_if_data *sdata)
351 {
352         MESHPARAMS_DEL(dot11MeshMaxRetries);
353         MESHPARAMS_DEL(dot11MeshRetryTimeout);
354         MESHPARAMS_DEL(dot11MeshConfirmTimeout);
355         MESHPARAMS_DEL(dot11MeshHoldingTimeout);
356         MESHPARAMS_DEL(dot11MeshTTL);
357         MESHPARAMS_DEL(auto_open_plinks);
358         MESHPARAMS_DEL(dot11MeshMaxPeerLinks);
359         MESHPARAMS_DEL(dot11MeshHWMPactivePathTimeout);
360         MESHPARAMS_DEL(dot11MeshHWMPpreqMinInterval);
361         MESHPARAMS_DEL(dot11MeshHWMPnetDiameterTraversalTime);
362         MESHPARAMS_DEL(dot11MeshHWMPmaxPREQretries);
363         MESHPARAMS_DEL(path_refresh_time);
364         MESHPARAMS_DEL(min_discovery_timeout);
365         debugfs_remove(sdata->mesh_config_dir);
366         sdata->mesh_config_dir = NULL;
367 }
368 #endif
369
370 static void del_files(struct ieee80211_sub_if_data *sdata)
371 {
372         if (!sdata->debugfsdir)
373                 return;
374
375         switch (sdata->vif.type) {
376         case NL80211_IFTYPE_MESH_POINT:
377 #ifdef CONFIG_MAC80211_MESH
378                 del_mesh_stats(sdata);
379                 del_mesh_config(sdata);
380 #endif
381                 break;
382         case NL80211_IFTYPE_STATION:
383                 del_sta_files(sdata);
384                 break;
385         case NL80211_IFTYPE_ADHOC:
386                 /* XXX */
387                 break;
388         case NL80211_IFTYPE_AP:
389                 del_ap_files(sdata);
390                 break;
391         case NL80211_IFTYPE_WDS:
392                 del_wds_files(sdata);
393                 break;
394         case NL80211_IFTYPE_MONITOR:
395                 del_monitor_files(sdata);
396                 break;
397         case NL80211_IFTYPE_AP_VLAN:
398                 del_vlan_files(sdata);
399                 break;
400         default:
401                 break;
402         }
403 }
404
405 static int notif_registered;
406
407 void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata)
408 {
409         char buf[10+IFNAMSIZ];
410
411         if (!notif_registered)
412                 return;
413
414         sprintf(buf, "netdev:%s", sdata->dev->name);
415         sdata->debugfsdir = debugfs_create_dir(buf,
416                 sdata->local->hw.wiphy->debugfsdir);
417         add_files(sdata);
418 }
419
420 void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata)
421 {
422         del_files(sdata);
423         debugfs_remove(sdata->debugfsdir);
424         sdata->debugfsdir = NULL;
425 }
426
427 static int netdev_notify(struct notifier_block *nb,
428                          unsigned long state,
429                          void *ndev)
430 {
431         struct net_device *dev = ndev;
432         struct dentry *dir;
433         struct ieee80211_sub_if_data *sdata;
434         char buf[10+IFNAMSIZ];
435
436         if (state != NETDEV_CHANGENAME)
437                 return 0;
438
439         if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
440                 return 0;
441
442         if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
443                 return 0;
444
445         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
446
447         dir = sdata->debugfsdir;
448
449         if (!dir)
450                 return 0;
451
452         sprintf(buf, "netdev:%s", dev->name);
453         if (!debugfs_rename(dir->d_parent, dir, dir->d_parent, buf))
454                 printk(KERN_ERR "mac80211: debugfs: failed to rename debugfs "
455                        "dir to %s\n", buf);
456
457         return 0;
458 }
459
460 static struct notifier_block mac80211_debugfs_netdev_notifier = {
461         .notifier_call = netdev_notify,
462 };
463
464 void ieee80211_debugfs_netdev_init(void)
465 {
466         int err;
467
468         err = register_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
469         if (err) {
470                 printk(KERN_ERR
471                        "mac80211: failed to install netdev notifier,"
472                        " disabling per-netdev debugfs!\n");
473         } else
474                 notif_registered = 1;
475 }
476
477 void ieee80211_debugfs_netdev_exit(void)
478 {
479         unregister_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
480         notif_registered = 0;
481 }