Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...
[linux-2.6.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 static ssize_t ieee80211_if_write(
45         struct ieee80211_sub_if_data *sdata,
46         const char __user *userbuf,
47         size_t count, loff_t *ppos,
48         ssize_t (*write)(struct ieee80211_sub_if_data *, const char *, int))
49 {
50         u8 *buf;
51         ssize_t ret = -ENODEV;
52
53         buf = kzalloc(count, GFP_KERNEL);
54         if (!buf)
55                 return -ENOMEM;
56
57         if (copy_from_user(buf, userbuf, count))
58                 return -EFAULT;
59
60         rtnl_lock();
61         if (sdata->dev->reg_state == NETREG_REGISTERED)
62                 ret = (*write)(sdata, buf, count);
63         rtnl_unlock();
64
65         return ret;
66 }
67
68 #define IEEE80211_IF_FMT(name, field, format_string)                    \
69 static ssize_t ieee80211_if_fmt_##name(                                 \
70         const struct ieee80211_sub_if_data *sdata, char *buf,           \
71         int buflen)                                                     \
72 {                                                                       \
73         return scnprintf(buf, buflen, format_string, sdata->field);     \
74 }
75 #define IEEE80211_IF_FMT_DEC(name, field)                               \
76                 IEEE80211_IF_FMT(name, field, "%d\n")
77 #define IEEE80211_IF_FMT_HEX(name, field)                               \
78                 IEEE80211_IF_FMT(name, field, "%#x\n")
79 #define IEEE80211_IF_FMT_SIZE(name, field)                              \
80                 IEEE80211_IF_FMT(name, field, "%zd\n")
81
82 #define IEEE80211_IF_FMT_ATOMIC(name, field)                            \
83 static ssize_t ieee80211_if_fmt_##name(                                 \
84         const struct ieee80211_sub_if_data *sdata,                      \
85         char *buf, int buflen)                                          \
86 {                                                                       \
87         return scnprintf(buf, buflen, "%d\n", atomic_read(&sdata->field));\
88 }
89
90 #define IEEE80211_IF_FMT_MAC(name, field)                               \
91 static ssize_t ieee80211_if_fmt_##name(                                 \
92         const struct ieee80211_sub_if_data *sdata, char *buf,           \
93         int buflen)                                                     \
94 {                                                                       \
95         return scnprintf(buf, buflen, "%pM\n", sdata->field);           \
96 }
97
98 #define __IEEE80211_IF_FILE(name, _write)                               \
99 static ssize_t ieee80211_if_read_##name(struct file *file,              \
100                                         char __user *userbuf,           \
101                                         size_t count, loff_t *ppos)     \
102 {                                                                       \
103         return ieee80211_if_read(file->private_data,                    \
104                                  userbuf, count, ppos,                  \
105                                  ieee80211_if_fmt_##name);              \
106 }                                                                       \
107 static const struct file_operations name##_ops = {                      \
108         .read = ieee80211_if_read_##name,                               \
109         .write = (_write),                                              \
110         .open = mac80211_open_file_generic,                             \
111 }
112
113 #define __IEEE80211_IF_FILE_W(name)                                     \
114 static ssize_t ieee80211_if_write_##name(struct file *file,             \
115                                          const char __user *userbuf,    \
116                                          size_t count, loff_t *ppos)    \
117 {                                                                       \
118         return ieee80211_if_write(file->private_data, userbuf, count,   \
119                                   ppos, ieee80211_if_parse_##name);     \
120 }                                                                       \
121 __IEEE80211_IF_FILE(name, ieee80211_if_write_##name)
122
123
124 #define IEEE80211_IF_FILE(name, field, format)                          \
125                 IEEE80211_IF_FMT_##format(name, field)                  \
126                 __IEEE80211_IF_FILE(name, NULL)
127
128 /* common attributes */
129 IEEE80211_IF_FILE(drop_unencrypted, drop_unencrypted, DEC);
130 IEEE80211_IF_FILE(rc_rateidx_mask_2ghz, rc_rateidx_mask[IEEE80211_BAND_2GHZ],
131                   HEX);
132 IEEE80211_IF_FILE(rc_rateidx_mask_5ghz, rc_rateidx_mask[IEEE80211_BAND_5GHZ],
133                   HEX);
134
135 /* STA attributes */
136 IEEE80211_IF_FILE(bssid, u.mgd.bssid, MAC);
137 IEEE80211_IF_FILE(aid, u.mgd.aid, DEC);
138
139 static int ieee80211_set_smps(struct ieee80211_sub_if_data *sdata,
140                               enum ieee80211_smps_mode smps_mode)
141 {
142         struct ieee80211_local *local = sdata->local;
143         int err;
144
145         if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_STATIC_SMPS) &&
146             smps_mode == IEEE80211_SMPS_STATIC)
147                 return -EINVAL;
148
149         /* auto should be dynamic if in PS mode */
150         if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS) &&
151             (smps_mode == IEEE80211_SMPS_DYNAMIC ||
152              smps_mode == IEEE80211_SMPS_AUTOMATIC))
153                 return -EINVAL;
154
155         /* supported only on managed interfaces for now */
156         if (sdata->vif.type != NL80211_IFTYPE_STATION)
157                 return -EOPNOTSUPP;
158
159         mutex_lock(&local->iflist_mtx);
160         err = __ieee80211_request_smps(sdata, smps_mode);
161         mutex_unlock(&local->iflist_mtx);
162
163         return err;
164 }
165
166 static const char *smps_modes[IEEE80211_SMPS_NUM_MODES] = {
167         [IEEE80211_SMPS_AUTOMATIC] = "auto",
168         [IEEE80211_SMPS_OFF] = "off",
169         [IEEE80211_SMPS_STATIC] = "static",
170         [IEEE80211_SMPS_DYNAMIC] = "dynamic",
171 };
172
173 static ssize_t ieee80211_if_fmt_smps(const struct ieee80211_sub_if_data *sdata,
174                                      char *buf, int buflen)
175 {
176         if (sdata->vif.type != NL80211_IFTYPE_STATION)
177                 return -EOPNOTSUPP;
178
179         return snprintf(buf, buflen, "request: %s\nused: %s\n",
180                         smps_modes[sdata->u.mgd.req_smps],
181                         smps_modes[sdata->u.mgd.ap_smps]);
182 }
183
184 static ssize_t ieee80211_if_parse_smps(struct ieee80211_sub_if_data *sdata,
185                                        const char *buf, int buflen)
186 {
187         enum ieee80211_smps_mode mode;
188
189         for (mode = 0; mode < IEEE80211_SMPS_NUM_MODES; mode++) {
190                 if (strncmp(buf, smps_modes[mode], buflen) == 0) {
191                         int err = ieee80211_set_smps(sdata, mode);
192                         if (!err)
193                                 return buflen;
194                         return err;
195                 }
196         }
197
198         return -EINVAL;
199 }
200
201 __IEEE80211_IF_FILE_W(smps);
202
203 /* AP attributes */
204 IEEE80211_IF_FILE(num_sta_ps, u.ap.num_sta_ps, ATOMIC);
205 IEEE80211_IF_FILE(dtim_count, u.ap.dtim_count, DEC);
206
207 static ssize_t ieee80211_if_fmt_num_buffered_multicast(
208         const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
209 {
210         return scnprintf(buf, buflen, "%u\n",
211                          skb_queue_len(&sdata->u.ap.ps_bc_buf));
212 }
213 __IEEE80211_IF_FILE(num_buffered_multicast, NULL);
214
215 /* WDS attributes */
216 IEEE80211_IF_FILE(peer, u.wds.remote_addr, MAC);
217
218 #ifdef CONFIG_MAC80211_MESH
219 /* Mesh stats attributes */
220 IEEE80211_IF_FILE(fwded_mcast, u.mesh.mshstats.fwded_mcast, DEC);
221 IEEE80211_IF_FILE(fwded_unicast, u.mesh.mshstats.fwded_unicast, DEC);
222 IEEE80211_IF_FILE(fwded_frames, u.mesh.mshstats.fwded_frames, DEC);
223 IEEE80211_IF_FILE(dropped_frames_ttl, u.mesh.mshstats.dropped_frames_ttl, DEC);
224 IEEE80211_IF_FILE(dropped_frames_no_route,
225                 u.mesh.mshstats.dropped_frames_no_route, DEC);
226 IEEE80211_IF_FILE(estab_plinks, u.mesh.mshstats.estab_plinks, ATOMIC);
227
228 /* Mesh parameters */
229 IEEE80211_IF_FILE(dot11MeshMaxRetries,
230                 u.mesh.mshcfg.dot11MeshMaxRetries, DEC);
231 IEEE80211_IF_FILE(dot11MeshRetryTimeout,
232                 u.mesh.mshcfg.dot11MeshRetryTimeout, DEC);
233 IEEE80211_IF_FILE(dot11MeshConfirmTimeout,
234                 u.mesh.mshcfg.dot11MeshConfirmTimeout, DEC);
235 IEEE80211_IF_FILE(dot11MeshHoldingTimeout,
236                 u.mesh.mshcfg.dot11MeshHoldingTimeout, DEC);
237 IEEE80211_IF_FILE(dot11MeshTTL, u.mesh.mshcfg.dot11MeshTTL, DEC);
238 IEEE80211_IF_FILE(auto_open_plinks, u.mesh.mshcfg.auto_open_plinks, DEC);
239 IEEE80211_IF_FILE(dot11MeshMaxPeerLinks,
240                 u.mesh.mshcfg.dot11MeshMaxPeerLinks, DEC);
241 IEEE80211_IF_FILE(dot11MeshHWMPactivePathTimeout,
242                 u.mesh.mshcfg.dot11MeshHWMPactivePathTimeout, DEC);
243 IEEE80211_IF_FILE(dot11MeshHWMPpreqMinInterval,
244                 u.mesh.mshcfg.dot11MeshHWMPpreqMinInterval, DEC);
245 IEEE80211_IF_FILE(dot11MeshHWMPnetDiameterTraversalTime,
246                 u.mesh.mshcfg.dot11MeshHWMPnetDiameterTraversalTime, DEC);
247 IEEE80211_IF_FILE(dot11MeshHWMPmaxPREQretries,
248                 u.mesh.mshcfg.dot11MeshHWMPmaxPREQretries, DEC);
249 IEEE80211_IF_FILE(path_refresh_time,
250                 u.mesh.mshcfg.path_refresh_time, DEC);
251 IEEE80211_IF_FILE(min_discovery_timeout,
252                 u.mesh.mshcfg.min_discovery_timeout, DEC);
253 IEEE80211_IF_FILE(dot11MeshHWMPRootMode,
254                 u.mesh.mshcfg.dot11MeshHWMPRootMode, DEC);
255 #endif
256
257
258 #define DEBUGFS_ADD(name) \
259         debugfs_create_file(#name, 0400, sdata->debugfs.dir, \
260                             sdata, &name##_ops);
261
262 #define DEBUGFS_ADD_MODE(name, mode) \
263         debugfs_create_file(#name, mode, sdata->debugfs.dir, \
264                             sdata, &name##_ops);
265
266 static void add_sta_files(struct ieee80211_sub_if_data *sdata)
267 {
268         DEBUGFS_ADD(drop_unencrypted);
269         DEBUGFS_ADD(rc_rateidx_mask_2ghz);
270         DEBUGFS_ADD(rc_rateidx_mask_5ghz);
271
272         DEBUGFS_ADD(bssid);
273         DEBUGFS_ADD(aid);
274         DEBUGFS_ADD_MODE(smps, 0600);
275 }
276
277 static void add_ap_files(struct ieee80211_sub_if_data *sdata)
278 {
279         DEBUGFS_ADD(drop_unencrypted);
280         DEBUGFS_ADD(rc_rateidx_mask_2ghz);
281         DEBUGFS_ADD(rc_rateidx_mask_5ghz);
282
283         DEBUGFS_ADD(num_sta_ps);
284         DEBUGFS_ADD(dtim_count);
285         DEBUGFS_ADD(num_buffered_multicast);
286 }
287
288 static void add_wds_files(struct ieee80211_sub_if_data *sdata)
289 {
290         DEBUGFS_ADD(drop_unencrypted);
291         DEBUGFS_ADD(rc_rateidx_mask_2ghz);
292         DEBUGFS_ADD(rc_rateidx_mask_5ghz);
293
294         DEBUGFS_ADD(peer);
295 }
296
297 static void add_vlan_files(struct ieee80211_sub_if_data *sdata)
298 {
299         DEBUGFS_ADD(drop_unencrypted);
300         DEBUGFS_ADD(rc_rateidx_mask_2ghz);
301         DEBUGFS_ADD(rc_rateidx_mask_5ghz);
302 }
303
304 static void add_monitor_files(struct ieee80211_sub_if_data *sdata)
305 {
306 }
307
308 #ifdef CONFIG_MAC80211_MESH
309
310 static void add_mesh_stats(struct ieee80211_sub_if_data *sdata)
311 {
312         struct dentry *dir = debugfs_create_dir("mesh_stats",
313                                                 sdata->debugfs.dir);
314
315 #define MESHSTATS_ADD(name)\
316         debugfs_create_file(#name, 0400, dir, sdata, &name##_ops);
317
318         MESHSTATS_ADD(fwded_mcast);
319         MESHSTATS_ADD(fwded_unicast);
320         MESHSTATS_ADD(fwded_frames);
321         MESHSTATS_ADD(dropped_frames_ttl);
322         MESHSTATS_ADD(dropped_frames_no_route);
323         MESHSTATS_ADD(estab_plinks);
324 #undef MESHSTATS_ADD
325 }
326
327 static void add_mesh_config(struct ieee80211_sub_if_data *sdata)
328 {
329         struct dentry *dir = debugfs_create_dir("mesh_config",
330                                                 sdata->debugfs.dir);
331
332 #define MESHPARAMS_ADD(name) \
333         debugfs_create_file(#name, 0600, dir, sdata, &name##_ops);
334
335         MESHPARAMS_ADD(dot11MeshMaxRetries);
336         MESHPARAMS_ADD(dot11MeshRetryTimeout);
337         MESHPARAMS_ADD(dot11MeshConfirmTimeout);
338         MESHPARAMS_ADD(dot11MeshHoldingTimeout);
339         MESHPARAMS_ADD(dot11MeshTTL);
340         MESHPARAMS_ADD(auto_open_plinks);
341         MESHPARAMS_ADD(dot11MeshMaxPeerLinks);
342         MESHPARAMS_ADD(dot11MeshHWMPactivePathTimeout);
343         MESHPARAMS_ADD(dot11MeshHWMPpreqMinInterval);
344         MESHPARAMS_ADD(dot11MeshHWMPnetDiameterTraversalTime);
345         MESHPARAMS_ADD(dot11MeshHWMPmaxPREQretries);
346         MESHPARAMS_ADD(path_refresh_time);
347         MESHPARAMS_ADD(min_discovery_timeout);
348
349 #undef MESHPARAMS_ADD
350 }
351 #endif
352
353 static void add_files(struct ieee80211_sub_if_data *sdata)
354 {
355         if (!sdata->debugfs.dir)
356                 return;
357
358         switch (sdata->vif.type) {
359         case NL80211_IFTYPE_MESH_POINT:
360 #ifdef CONFIG_MAC80211_MESH
361                 add_mesh_stats(sdata);
362                 add_mesh_config(sdata);
363 #endif
364                 break;
365         case NL80211_IFTYPE_STATION:
366                 add_sta_files(sdata);
367                 break;
368         case NL80211_IFTYPE_ADHOC:
369                 /* XXX */
370                 break;
371         case NL80211_IFTYPE_AP:
372                 add_ap_files(sdata);
373                 break;
374         case NL80211_IFTYPE_WDS:
375                 add_wds_files(sdata);
376                 break;
377         case NL80211_IFTYPE_MONITOR:
378                 add_monitor_files(sdata);
379                 break;
380         case NL80211_IFTYPE_AP_VLAN:
381                 add_vlan_files(sdata);
382                 break;
383         default:
384                 break;
385         }
386 }
387
388 void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata)
389 {
390         char buf[10+IFNAMSIZ];
391
392         sprintf(buf, "netdev:%s", sdata->name);
393         sdata->debugfs.dir = debugfs_create_dir(buf,
394                 sdata->local->hw.wiphy->debugfsdir);
395         add_files(sdata);
396 }
397
398 void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata)
399 {
400         if (!sdata->debugfs.dir)
401                 return;
402
403         debugfs_remove_recursive(sdata->debugfs.dir);
404         sdata->debugfs.dir = NULL;
405 }
406
407 void ieee80211_debugfs_rename_netdev(struct ieee80211_sub_if_data *sdata)
408 {
409         struct dentry *dir;
410         char buf[10 + IFNAMSIZ];
411
412         dir = sdata->debugfs.dir;
413
414         if (!dir)
415                 return;
416
417         sprintf(buf, "netdev:%s", sdata->name);
418         if (!debugfs_rename(dir->d_parent, dir, dir->d_parent, buf))
419                 printk(KERN_ERR "mac80211: debugfs: failed to rename debugfs "
420                        "dir to %s\n", buf);
421 }