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/slab.h>
17#include <linux/notifier.h>
18#include <net/mac80211.h>
19#include <net/cfg80211.h>
20#include "ieee80211_i.h"
21#include "rate.h"
22#include "debugfs.h"
23#include "debugfs_netdev.h"
24
25static ssize_t ieee80211_if_read(
26 struct ieee80211_sub_if_data *sdata,
27 char __user *userbuf,
28 size_t count, loff_t *ppos,
29 ssize_t (*format)(const struct ieee80211_sub_if_data *, char *, int))
30{
31 char buf[70];
32 ssize_t ret = -EINVAL;
33
34 read_lock(&dev_base_lock);
35 if (sdata->dev->reg_state == NETREG_REGISTERED)
36 ret = (*format)(sdata, buf, sizeof(buf));
37 read_unlock(&dev_base_lock);
38
39 if (ret != -EINVAL)
40 ret = simple_read_from_buffer(userbuf, count, ppos, buf, ret);
41
42 return ret;
43}
44
45static ssize_t ieee80211_if_write(
46 struct ieee80211_sub_if_data *sdata,
47 const char __user *userbuf,
48 size_t count, loff_t *ppos,
49 ssize_t (*write)(struct ieee80211_sub_if_data *, const char *, int))
50{
51 u8 *buf;
52 ssize_t ret;
53
54 buf = kmalloc(count, GFP_KERNEL);
55 if (!buf)
56 return -ENOMEM;
57
58 ret = -EFAULT;
59 if (copy_from_user(buf, userbuf, count))
60 goto freebuf;
61
62 ret = -ENODEV;
63 rtnl_lock();
64 if (sdata->dev->reg_state == NETREG_REGISTERED)
65 ret = (*write)(sdata, buf, count);
66 rtnl_unlock();
67
68freebuf:
69 kfree(buf);
70 return ret;
71}
72
73#define IEEE80211_IF_FMT(name, field, format_string) \
74static ssize_t ieee80211_if_fmt_##name( \
75 const struct ieee80211_sub_if_data *sdata, char *buf, \
76 int buflen) \
77{ \
78 return scnprintf(buf, buflen, format_string, sdata->field); \
79}
80#define IEEE80211_IF_FMT_DEC(name, field) \
81 IEEE80211_IF_FMT(name, field, "%d\n")
82#define IEEE80211_IF_FMT_HEX(name, field) \
83 IEEE80211_IF_FMT(name, field, "%#x\n")
84#define IEEE80211_IF_FMT_SIZE(name, field) \
85 IEEE80211_IF_FMT(name, field, "%zd\n")
86
87#define IEEE80211_IF_FMT_ATOMIC(name, field) \
88static ssize_t ieee80211_if_fmt_##name( \
89 const struct ieee80211_sub_if_data *sdata, \
90 char *buf, int buflen) \
91{ \
92 return scnprintf(buf, buflen, "%d\n", atomic_read(&sdata->field));\
93}
94
95#define IEEE80211_IF_FMT_MAC(name, field) \
96static ssize_t ieee80211_if_fmt_##name( \
97 const struct ieee80211_sub_if_data *sdata, char *buf, \
98 int buflen) \
99{ \
100 return scnprintf(buf, buflen, "%pM\n", sdata->field); \
101}
102
103#define IEEE80211_IF_FMT_DEC_DIV_16(name, field) \
104static ssize_t ieee80211_if_fmt_##name( \
105 const struct ieee80211_sub_if_data *sdata, \
106 char *buf, int buflen) \
107{ \
108 return scnprintf(buf, buflen, "%d\n", sdata->field / 16); \
109}
110
111#define __IEEE80211_IF_FILE(name, _write) \
112static ssize_t ieee80211_if_read_##name(struct file *file, \
113 char __user *userbuf, \
114 size_t count, loff_t *ppos) \
115{ \
116 return ieee80211_if_read(file->private_data, \
117 userbuf, count, ppos, \
118 ieee80211_if_fmt_##name); \
119} \
120static const struct file_operations name##_ops = { \
121 .read = ieee80211_if_read_##name, \
122 .write = (_write), \
123 .open = mac80211_open_file_generic, \
124 .llseek = generic_file_llseek, \
125}
126
127#define __IEEE80211_IF_FILE_W(name) \
128static ssize_t ieee80211_if_write_##name(struct file *file, \
129 const char __user *userbuf, \
130 size_t count, loff_t *ppos) \
131{ \
132 return ieee80211_if_write(file->private_data, userbuf, count, \
133 ppos, ieee80211_if_parse_##name); \
134} \
135__IEEE80211_IF_FILE(name, ieee80211_if_write_##name)
136
137
138#define IEEE80211_IF_FILE(name, field, format) \
139 IEEE80211_IF_FMT_##format(name, field) \
140 __IEEE80211_IF_FILE(name, NULL)
141
142/* common attributes */
143IEEE80211_IF_FILE(drop_unencrypted, drop_unencrypted, DEC);
144IEEE80211_IF_FILE(rc_rateidx_mask_2ghz, rc_rateidx_mask[IEEE80211_BAND_2GHZ],
145 HEX);
146IEEE80211_IF_FILE(rc_rateidx_mask_5ghz, rc_rateidx_mask[IEEE80211_BAND_5GHZ],
147 HEX);
148
149/* STA attributes */
150IEEE80211_IF_FILE(bssid, u.mgd.bssid, MAC);
151IEEE80211_IF_FILE(aid, u.mgd.aid, DEC);
152IEEE80211_IF_FILE(last_beacon, u.mgd.last_beacon_signal, DEC);
153IEEE80211_IF_FILE(ave_beacon, u.mgd.ave_beacon_signal, DEC_DIV_16);
154
155static int ieee80211_set_smps(struct ieee80211_sub_if_data *sdata,
156 enum ieee80211_smps_mode smps_mode)
157{
158 struct ieee80211_local *local = sdata->local;
159 int err;
160
161 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_STATIC_SMPS) &&
162 smps_mode == IEEE80211_SMPS_STATIC)
163 return -EINVAL;
164
165 /* auto should be dynamic if in PS mode */
166 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS) &&
167 (smps_mode == IEEE80211_SMPS_DYNAMIC ||
168 smps_mode == IEEE80211_SMPS_AUTOMATIC))
169 return -EINVAL;
170
171 /* supported only on managed interfaces for now */
172 if (sdata->vif.type != NL80211_IFTYPE_STATION)
173 return -EOPNOTSUPP;
174
175 mutex_lock(&local->iflist_mtx);
176 err = __ieee80211_request_smps(sdata, smps_mode);
177 mutex_unlock(&local->iflist_mtx);
178
179 return err;
180}
181
182static const char *smps_modes[IEEE80211_SMPS_NUM_MODES] = {
183 [IEEE80211_SMPS_AUTOMATIC] = "auto",
184 [IEEE80211_SMPS_OFF] = "off",
185 [IEEE80211_SMPS_STATIC] = "static",
186 [IEEE80211_SMPS_DYNAMIC] = "dynamic",
187};
188
189static ssize_t ieee80211_if_fmt_smps(const struct ieee80211_sub_if_data *sdata,
190 char *buf, int buflen)
191{
192 if (sdata->vif.type != NL80211_IFTYPE_STATION)
193 return -EOPNOTSUPP;
194
195 return snprintf(buf, buflen, "request: %s\nused: %s\n",
196 smps_modes[sdata->u.mgd.req_smps],
197 smps_modes[sdata->u.mgd.ap_smps]);
198}
199
200static ssize_t ieee80211_if_parse_smps(struct ieee80211_sub_if_data *sdata,
201 const char *buf, int buflen)
202{
203 enum ieee80211_smps_mode mode;
204
205 for (mode = 0; mode < IEEE80211_SMPS_NUM_MODES; mode++) {
206 if (strncmp(buf, smps_modes[mode], buflen) == 0) {
207 int err = ieee80211_set_smps(sdata, mode);
208 if (!err)
209 return buflen;
210 return err;
211 }
212 }
213
214 return -EINVAL;
215}
216
217__IEEE80211_IF_FILE_W(smps);
218
219/* AP attributes */
220IEEE80211_IF_FILE(num_sta_ps, u.ap.num_sta_ps, ATOMIC);
221IEEE80211_IF_FILE(dtim_count, u.ap.dtim_count, DEC);
222
223static ssize_t ieee80211_if_fmt_num_buffered_multicast(
224 const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
225{
226 return scnprintf(buf, buflen, "%u\n",
227 skb_queue_len(&sdata->u.ap.ps_bc_buf));
228}
229__IEEE80211_IF_FILE(num_buffered_multicast, NULL);
230
231/* WDS attributes */
232IEEE80211_IF_FILE(peer, u.wds.remote_addr, MAC);
233
234#ifdef CONFIG_MAC80211_MESH
235/* Mesh stats attributes */
236IEEE80211_IF_FILE(fwded_mcast, u.mesh.mshstats.fwded_mcast, DEC);
237IEEE80211_IF_FILE(fwded_unicast, u.mesh.mshstats.fwded_unicast, DEC);
238IEEE80211_IF_FILE(fwded_frames, u.mesh.mshstats.fwded_frames, DEC);
239IEEE80211_IF_FILE(dropped_frames_ttl, u.mesh.mshstats.dropped_frames_ttl, DEC);
240IEEE80211_IF_FILE(dropped_frames_no_route,
241 u.mesh.mshstats.dropped_frames_no_route, DEC);
242IEEE80211_IF_FILE(estab_plinks, u.mesh.mshstats.estab_plinks, ATOMIC);
243
244/* Mesh parameters */
245IEEE80211_IF_FILE(dot11MeshMaxRetries,
246 u.mesh.mshcfg.dot11MeshMaxRetries, DEC);
247IEEE80211_IF_FILE(dot11MeshRetryTimeout,
248 u.mesh.mshcfg.dot11MeshRetryTimeout, DEC);
249IEEE80211_IF_FILE(dot11MeshConfirmTimeout,
250 u.mesh.mshcfg.dot11MeshConfirmTimeout, DEC);
251IEEE80211_IF_FILE(dot11MeshHoldingTimeout,
252 u.mesh.mshcfg.dot11MeshHoldingTimeout, DEC);
253IEEE80211_IF_FILE(dot11MeshTTL, u.mesh.mshcfg.dot11MeshTTL, DEC);
254IEEE80211_IF_FILE(element_ttl, u.mesh.mshcfg.element_ttl, DEC);
255IEEE80211_IF_FILE(auto_open_plinks, u.mesh.mshcfg.auto_open_plinks, DEC);
256IEEE80211_IF_FILE(dot11MeshMaxPeerLinks,
257 u.mesh.mshcfg.dot11MeshMaxPeerLinks, DEC);
258IEEE80211_IF_FILE(dot11MeshHWMPactivePathTimeout,
259 u.mesh.mshcfg.dot11MeshHWMPactivePathTimeout, DEC);
260IEEE80211_IF_FILE(dot11MeshHWMPpreqMinInterval,
261 u.mesh.mshcfg.dot11MeshHWMPpreqMinInterval, DEC);
262IEEE80211_IF_FILE(dot11MeshHWMPnetDiameterTraversalTime,
263 u.mesh.mshcfg.dot11MeshHWMPnetDiameterTraversalTime, DEC);
264IEEE80211_IF_FILE(dot11MeshHWMPmaxPREQretries,
265 u.mesh.mshcfg.dot11MeshHWMPmaxPREQretries, DEC);
266IEEE80211_IF_FILE(path_refresh_time,
267 u.mesh.mshcfg.path_refresh_time, DEC);
268IEEE80211_IF_FILE(min_discovery_timeout,
269 u.mesh.mshcfg.min_discovery_timeout, DEC);
270IEEE80211_IF_FILE(dot11MeshHWMPRootMode,
271 u.mesh.mshcfg.dot11MeshHWMPRootMode, DEC);
272#endif
273
274
275#define DEBUGFS_ADD(name) \
276 debugfs_create_file(#name, 0400, sdata->debugfs.dir, \
277 sdata, &name##_ops);
278
279#define DEBUGFS_ADD_MODE(name, mode) \
280 debugfs_create_file(#name, mode, sdata->debugfs.dir, \
281 sdata, &name##_ops);
282
283static void add_sta_files(struct ieee80211_sub_if_data *sdata)
284{
285 DEBUGFS_ADD(drop_unencrypted);
286 DEBUGFS_ADD(rc_rateidx_mask_2ghz);
287 DEBUGFS_ADD(rc_rateidx_mask_5ghz);
288
289 DEBUGFS_ADD(bssid);
290 DEBUGFS_ADD(aid);
291 DEBUGFS_ADD(last_beacon);
292 DEBUGFS_ADD(ave_beacon);
293 DEBUGFS_ADD_MODE(smps, 0600);
294}
295
296static void add_ap_files(struct ieee80211_sub_if_data *sdata)
297{
298 DEBUGFS_ADD(drop_unencrypted);
299 DEBUGFS_ADD(rc_rateidx_mask_2ghz);
300 DEBUGFS_ADD(rc_rateidx_mask_5ghz);
301
302 DEBUGFS_ADD(num_sta_ps);
303 DEBUGFS_ADD(dtim_count);
304 DEBUGFS_ADD(num_buffered_multicast);
305}
306
307static void add_wds_files(struct ieee80211_sub_if_data *sdata)
308{
309 DEBUGFS_ADD(drop_unencrypted);
310 DEBUGFS_ADD(rc_rateidx_mask_2ghz);
311 DEBUGFS_ADD(rc_rateidx_mask_5ghz);
312
313 DEBUGFS_ADD(peer);
314}
315
316static void add_vlan_files(struct ieee80211_sub_if_data *sdata)
317{
318 DEBUGFS_ADD(drop_unencrypted);
319 DEBUGFS_ADD(rc_rateidx_mask_2ghz);
320 DEBUGFS_ADD(rc_rateidx_mask_5ghz);
321}
322
323static void add_monitor_files(struct ieee80211_sub_if_data *sdata)
324{
325}
326
327#ifdef CONFIG_MAC80211_MESH
328
329static void add_mesh_stats(struct ieee80211_sub_if_data *sdata)
330{
331 struct dentry *dir = debugfs_create_dir("mesh_stats",
332 sdata->debugfs.dir);
333
334#define MESHSTATS_ADD(name)\
335 debugfs_create_file(#name, 0400, dir, sdata, &name##_ops);
336
337 MESHSTATS_ADD(fwded_mcast);
338 MESHSTATS_ADD(fwded_unicast);
339 MESHSTATS_ADD(fwded_frames);
340 MESHSTATS_ADD(dropped_frames_ttl);
341 MESHSTATS_ADD(dropped_frames_no_route);
342 MESHSTATS_ADD(estab_plinks);
343#undef MESHSTATS_ADD
344}
345
346static void add_mesh_config(struct ieee80211_sub_if_data *sdata)
347{
348 struct dentry *dir = debugfs_create_dir("mesh_config",
349 sdata->debugfs.dir);
350
351#define MESHPARAMS_ADD(name) \
352 debugfs_create_file(#name, 0600, dir, sdata, &name##_ops);
353
354 MESHPARAMS_ADD(dot11MeshMaxRetries);
355 MESHPARAMS_ADD(dot11MeshRetryTimeout);
356 MESHPARAMS_ADD(dot11MeshConfirmTimeout);
357 MESHPARAMS_ADD(dot11MeshHoldingTimeout);
358 MESHPARAMS_ADD(dot11MeshTTL);
359 MESHPARAMS_ADD(element_ttl);
360 MESHPARAMS_ADD(auto_open_plinks);
361 MESHPARAMS_ADD(dot11MeshMaxPeerLinks);
362 MESHPARAMS_ADD(dot11MeshHWMPactivePathTimeout);
363 MESHPARAMS_ADD(dot11MeshHWMPpreqMinInterval);
364 MESHPARAMS_ADD(dot11MeshHWMPnetDiameterTraversalTime);
365 MESHPARAMS_ADD(dot11MeshHWMPmaxPREQretries);
366 MESHPARAMS_ADD(path_refresh_time);
367 MESHPARAMS_ADD(min_discovery_timeout);
368
369#undef MESHPARAMS_ADD
370}
371#endif
372
373static void add_files(struct ieee80211_sub_if_data *sdata)
374{
375 if (!sdata->debugfs.dir)
376 return;
377
378 switch (sdata->vif.type) {
379 case NL80211_IFTYPE_MESH_POINT:
380#ifdef CONFIG_MAC80211_MESH
381 add_mesh_stats(sdata);
382 add_mesh_config(sdata);
383#endif
384 break;
385 case NL80211_IFTYPE_STATION:
386 add_sta_files(sdata);
387 break;
388 case NL80211_IFTYPE_ADHOC:
389 /* XXX */
390 break;
391 case NL80211_IFTYPE_AP:
392 add_ap_files(sdata);
393 break;
394 case NL80211_IFTYPE_WDS:
395 add_wds_files(sdata);
396 break;
397 case NL80211_IFTYPE_MONITOR:
398 add_monitor_files(sdata);
399 break;
400 case NL80211_IFTYPE_AP_VLAN:
401 add_vlan_files(sdata);
402 break;
403 default:
404 break;
405 }
406}
407
408void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata)
409{
410 char buf[10+IFNAMSIZ];
411
412 sprintf(buf, "netdev:%s", sdata->name);
413 sdata->debugfs.dir = debugfs_create_dir(buf,
414 sdata->local->hw.wiphy->debugfsdir);
415 if (sdata->debugfs.dir)
416 sdata->debugfs.subdir_stations = debugfs_create_dir("stations",
417 sdata->debugfs.dir);
418 add_files(sdata);
419}
420
421void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata)
422{
423 if (!sdata->debugfs.dir)
424 return;
425
426 debugfs_remove_recursive(sdata->debugfs.dir);
427 sdata->debugfs.dir = NULL;
428}
429
430void ieee80211_debugfs_rename_netdev(struct ieee80211_sub_if_data *sdata)
431{
432 struct dentry *dir;
433 char buf[10 + IFNAMSIZ];
434
435 dir = sdata->debugfs.dir;
436
437 if (!dir)
438 return;
439
440 sprintf(buf, "netdev:%s", sdata->name);
441 if (!debugfs_rename(dir->d_parent, dir, dir->d_parent, buf))
442 printk(KERN_ERR "mac80211: debugfs: failed to rename debugfs "
443 "dir to %s\n", buf);
444}