Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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
24static 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
44static 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) \
69static 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) \
83static 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) \
91static 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) \
99static 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} \
107static 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) \
114static 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 */
129IEEE80211_IF_FILE(drop_unencrypted, drop_unencrypted, DEC);
130IEEE80211_IF_FILE(rc_rateidx_mask_2ghz, rc_rateidx_mask[IEEE80211_BAND_2GHZ],
131 HEX);
132IEEE80211_IF_FILE(rc_rateidx_mask_5ghz, rc_rateidx_mask[IEEE80211_BAND_5GHZ],
133 HEX);
134
135/* STA attributes */
136IEEE80211_IF_FILE(bssid, u.mgd.bssid, MAC);
137IEEE80211_IF_FILE(aid, u.mgd.aid, DEC);
138
139static 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
166static 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
173static 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
184static 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 */
204IEEE80211_IF_FILE(num_sta_ps, u.ap.num_sta_ps, ATOMIC);
205IEEE80211_IF_FILE(dtim_count, u.ap.dtim_count, DEC);
206
207static 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 */
216IEEE80211_IF_FILE(peer, u.wds.remote_addr, MAC);
217
218#ifdef CONFIG_MAC80211_MESH
219/* Mesh stats attributes */
220IEEE80211_IF_FILE(fwded_mcast, u.mesh.mshstats.fwded_mcast, DEC);
221IEEE80211_IF_FILE(fwded_unicast, u.mesh.mshstats.fwded_unicast, DEC);
222IEEE80211_IF_FILE(fwded_frames, u.mesh.mshstats.fwded_frames, DEC);
223IEEE80211_IF_FILE(dropped_frames_ttl, u.mesh.mshstats.dropped_frames_ttl, DEC);
224IEEE80211_IF_FILE(dropped_frames_no_route,
225 u.mesh.mshstats.dropped_frames_no_route, DEC);
226IEEE80211_IF_FILE(estab_plinks, u.mesh.mshstats.estab_plinks, ATOMIC);
227
228/* Mesh parameters */
229IEEE80211_IF_FILE(dot11MeshMaxRetries,
230 u.mesh.mshcfg.dot11MeshMaxRetries, DEC);
231IEEE80211_IF_FILE(dot11MeshRetryTimeout,
232 u.mesh.mshcfg.dot11MeshRetryTimeout, DEC);
233IEEE80211_IF_FILE(dot11MeshConfirmTimeout,
234 u.mesh.mshcfg.dot11MeshConfirmTimeout, DEC);
235IEEE80211_IF_FILE(dot11MeshHoldingTimeout,
236 u.mesh.mshcfg.dot11MeshHoldingTimeout, DEC);
237IEEE80211_IF_FILE(dot11MeshTTL, u.mesh.mshcfg.dot11MeshTTL, DEC);
238IEEE80211_IF_FILE(auto_open_plinks, u.mesh.mshcfg.auto_open_plinks, DEC);
239IEEE80211_IF_FILE(dot11MeshMaxPeerLinks,
240 u.mesh.mshcfg.dot11MeshMaxPeerLinks, DEC);
241IEEE80211_IF_FILE(dot11MeshHWMPactivePathTimeout,
242 u.mesh.mshcfg.dot11MeshHWMPactivePathTimeout, DEC);
243IEEE80211_IF_FILE(dot11MeshHWMPpreqMinInterval,
244 u.mesh.mshcfg.dot11MeshHWMPpreqMinInterval, DEC);
245IEEE80211_IF_FILE(dot11MeshHWMPnetDiameterTraversalTime,
246 u.mesh.mshcfg.dot11MeshHWMPnetDiameterTraversalTime, DEC);
247IEEE80211_IF_FILE(dot11MeshHWMPmaxPREQretries,
248 u.mesh.mshcfg.dot11MeshHWMPmaxPREQretries, DEC);
249IEEE80211_IF_FILE(path_refresh_time,
250 u.mesh.mshcfg.path_refresh_time, DEC);
251IEEE80211_IF_FILE(min_discovery_timeout,
252 u.mesh.mshcfg.min_discovery_timeout, DEC);
253IEEE80211_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
266static 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
277static 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
288static 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
297static 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
304static void add_monitor_files(struct ieee80211_sub_if_data *sdata)
305{
306}
307
308#ifdef CONFIG_MAC80211_MESH
309
310static 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
327static 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
353static 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
388void 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
398void 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
407void 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}