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