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 >= 0)
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_LHEX(name, field) \
85 IEEE80211_IF_FMT(name, field, "%#lx\n")
86#define IEEE80211_IF_FMT_SIZE(name, field) \
87 IEEE80211_IF_FMT(name, field, "%zd\n")
88
89#define IEEE80211_IF_FMT_ATOMIC(name, field) \
90static ssize_t ieee80211_if_fmt_##name( \
91 const struct ieee80211_sub_if_data *sdata, \
92 char *buf, int buflen) \
93{ \
94 return scnprintf(buf, buflen, "%d\n", atomic_read(&sdata->field));\
95}
96
97#define IEEE80211_IF_FMT_MAC(name, field) \
98static ssize_t ieee80211_if_fmt_##name( \
99 const struct ieee80211_sub_if_data *sdata, char *buf, \
100 int buflen) \
101{ \
102 return scnprintf(buf, buflen, "%pM\n", sdata->field); \
103}
104
105#define IEEE80211_IF_FMT_DEC_DIV_16(name, field) \
106static ssize_t ieee80211_if_fmt_##name( \
107 const struct ieee80211_sub_if_data *sdata, \
108 char *buf, int buflen) \
109{ \
110 return scnprintf(buf, buflen, "%d\n", sdata->field / 16); \
111}
112
113#define __IEEE80211_IF_FILE(name, _write) \
114static ssize_t ieee80211_if_read_##name(struct file *file, \
115 char __user *userbuf, \
116 size_t count, loff_t *ppos) \
117{ \
118 return ieee80211_if_read(file->private_data, \
119 userbuf, count, ppos, \
120 ieee80211_if_fmt_##name); \
121} \
122static const struct file_operations name##_ops = { \
123 .read = ieee80211_if_read_##name, \
124 .write = (_write), \
125 .open = mac80211_open_file_generic, \
126 .llseek = generic_file_llseek, \
127}
128
129#define __IEEE80211_IF_FILE_W(name) \
130static ssize_t ieee80211_if_write_##name(struct file *file, \
131 const char __user *userbuf, \
132 size_t count, loff_t *ppos) \
133{ \
134 return ieee80211_if_write(file->private_data, userbuf, count, \
135 ppos, ieee80211_if_parse_##name); \
136} \
137__IEEE80211_IF_FILE(name, ieee80211_if_write_##name)
138
139
140#define IEEE80211_IF_FILE(name, field, format) \
141 IEEE80211_IF_FMT_##format(name, field) \
142 __IEEE80211_IF_FILE(name, NULL)
143
144/* common attributes */
145IEEE80211_IF_FILE(drop_unencrypted, drop_unencrypted, DEC);
146IEEE80211_IF_FILE(rc_rateidx_mask_2ghz, rc_rateidx_mask[IEEE80211_BAND_2GHZ],
147 HEX);
148IEEE80211_IF_FILE(rc_rateidx_mask_5ghz, rc_rateidx_mask[IEEE80211_BAND_5GHZ],
149 HEX);
150IEEE80211_IF_FILE(flags, flags, HEX);
151IEEE80211_IF_FILE(state, state, LHEX);
152IEEE80211_IF_FILE(channel_type, vif.bss_conf.channel_type, DEC);
153
154/* STA attributes */
155IEEE80211_IF_FILE(bssid, u.mgd.bssid, MAC);
156IEEE80211_IF_FILE(aid, u.mgd.aid, DEC);
157IEEE80211_IF_FILE(last_beacon, u.mgd.last_beacon_signal, DEC);
158IEEE80211_IF_FILE(ave_beacon, u.mgd.ave_beacon_signal, DEC_DIV_16);
159
160static int ieee80211_set_smps(struct ieee80211_sub_if_data *sdata,
161 enum ieee80211_smps_mode smps_mode)
162{
163 struct ieee80211_local *local = sdata->local;
164 int err;
165
166 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_STATIC_SMPS) &&
167 smps_mode == IEEE80211_SMPS_STATIC)
168 return -EINVAL;
169
170 /* auto should be dynamic if in PS mode */
171 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS) &&
172 (smps_mode == IEEE80211_SMPS_DYNAMIC ||
173 smps_mode == IEEE80211_SMPS_AUTOMATIC))
174 return -EINVAL;
175
176 /* supported only on managed interfaces for now */
177 if (sdata->vif.type != NL80211_IFTYPE_STATION)
178 return -EOPNOTSUPP;
179
180 mutex_lock(&sdata->u.mgd.mtx);
181 err = __ieee80211_request_smps(sdata, smps_mode);
182 mutex_unlock(&sdata->u.mgd.mtx);
183
184 return err;
185}
186
187static const char *smps_modes[IEEE80211_SMPS_NUM_MODES] = {
188 [IEEE80211_SMPS_AUTOMATIC] = "auto",
189 [IEEE80211_SMPS_OFF] = "off",
190 [IEEE80211_SMPS_STATIC] = "static",
191 [IEEE80211_SMPS_DYNAMIC] = "dynamic",
192};
193
194static ssize_t ieee80211_if_fmt_smps(const struct ieee80211_sub_if_data *sdata,
195 char *buf, int buflen)
196{
197 if (sdata->vif.type != NL80211_IFTYPE_STATION)
198 return -EOPNOTSUPP;
199
200 return snprintf(buf, buflen, "request: %s\nused: %s\n",
201 smps_modes[sdata->u.mgd.req_smps],
202 smps_modes[sdata->u.mgd.ap_smps]);
203}
204
205static ssize_t ieee80211_if_parse_smps(struct ieee80211_sub_if_data *sdata,
206 const char *buf, int buflen)
207{
208 enum ieee80211_smps_mode mode;
209
210 for (mode = 0; mode < IEEE80211_SMPS_NUM_MODES; mode++) {
211 if (strncmp(buf, smps_modes[mode], buflen) == 0) {
212 int err = ieee80211_set_smps(sdata, mode);
213 if (!err)
214 return buflen;
215 return err;
216 }
217 }
218
219 return -EINVAL;
220}
221
222__IEEE80211_IF_FILE_W(smps);
223
224static ssize_t ieee80211_if_fmt_tkip_mic_test(
225 const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
226{
227 return -EOPNOTSUPP;
228}
229
230static int hwaddr_aton(const char *txt, u8 *addr)
231{
232 int i;
233
234 for (i = 0; i < ETH_ALEN; i++) {
235 int a, b;
236
237 a = hex_to_bin(*txt++);
238 if (a < 0)
239 return -1;
240 b = hex_to_bin(*txt++);
241 if (b < 0)
242 return -1;
243 *addr++ = (a << 4) | b;
244 if (i < 5 && *txt++ != ':')
245 return -1;
246 }
247
248 return 0;
249}
250
251static ssize_t ieee80211_if_parse_tkip_mic_test(
252 struct ieee80211_sub_if_data *sdata, const char *buf, int buflen)
253{
254 struct ieee80211_local *local = sdata->local;
255 u8 addr[ETH_ALEN];
256 struct sk_buff *skb;
257 struct ieee80211_hdr *hdr;
258 __le16 fc;
259
260 /*
261 * Assume colon-delimited MAC address with possible white space
262 * following.
263 */
264 if (buflen < 3 * ETH_ALEN - 1)
265 return -EINVAL;
266 if (hwaddr_aton(buf, addr) < 0)
267 return -EINVAL;
268
269 if (!ieee80211_sdata_running(sdata))
270 return -ENOTCONN;
271
272 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24 + 100);
273 if (!skb)
274 return -ENOMEM;
275 skb_reserve(skb, local->hw.extra_tx_headroom);
276
277 hdr = (struct ieee80211_hdr *) skb_put(skb, 24);
278 memset(hdr, 0, 24);
279 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
280
281 switch (sdata->vif.type) {
282 case NL80211_IFTYPE_AP:
283 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
284 /* DA BSSID SA */
285 memcpy(hdr->addr1, addr, ETH_ALEN);
286 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
287 memcpy(hdr->addr3, sdata->vif.addr, ETH_ALEN);
288 break;
289 case NL80211_IFTYPE_STATION:
290 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
291 /* BSSID SA DA */
292 if (sdata->vif.bss_conf.bssid == NULL) {
293 dev_kfree_skb(skb);
294 return -ENOTCONN;
295 }
296 memcpy(hdr->addr1, sdata->vif.bss_conf.bssid, ETH_ALEN);
297 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
298 memcpy(hdr->addr3, addr, ETH_ALEN);
299 break;
300 default:
301 dev_kfree_skb(skb);
302 return -EOPNOTSUPP;
303 }
304 hdr->frame_control = fc;
305
306 /*
307 * Add some length to the test frame to make it look bit more valid.
308 * The exact contents does not matter since the recipient is required
309 * to drop this because of the Michael MIC failure.
310 */
311 memset(skb_put(skb, 50), 0, 50);
312
313 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_TKIP_MIC_FAILURE;
314
315 ieee80211_tx_skb(sdata, skb);
316
317 return buflen;
318}
319
320__IEEE80211_IF_FILE_W(tkip_mic_test);
321
322/* AP attributes */
323IEEE80211_IF_FILE(num_sta_ps, u.ap.num_sta_ps, ATOMIC);
324IEEE80211_IF_FILE(dtim_count, u.ap.dtim_count, DEC);
325
326static ssize_t ieee80211_if_fmt_num_buffered_multicast(
327 const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
328{
329 return scnprintf(buf, buflen, "%u\n",
330 skb_queue_len(&sdata->u.ap.ps_bc_buf));
331}
332__IEEE80211_IF_FILE(num_buffered_multicast, NULL);
333
334/* WDS attributes */
335IEEE80211_IF_FILE(peer, u.wds.remote_addr, MAC);
336
337#ifdef CONFIG_MAC80211_MESH
338/* Mesh stats attributes */
339IEEE80211_IF_FILE(fwded_mcast, u.mesh.mshstats.fwded_mcast, DEC);
340IEEE80211_IF_FILE(fwded_unicast, u.mesh.mshstats.fwded_unicast, DEC);
341IEEE80211_IF_FILE(fwded_frames, u.mesh.mshstats.fwded_frames, DEC);
342IEEE80211_IF_FILE(dropped_frames_ttl, u.mesh.mshstats.dropped_frames_ttl, DEC);
343IEEE80211_IF_FILE(dropped_frames_no_route,
344 u.mesh.mshstats.dropped_frames_no_route, DEC);
345IEEE80211_IF_FILE(estab_plinks, u.mesh.mshstats.estab_plinks, ATOMIC);
346
347/* Mesh parameters */
348IEEE80211_IF_FILE(dot11MeshMaxRetries,
349 u.mesh.mshcfg.dot11MeshMaxRetries, DEC);
350IEEE80211_IF_FILE(dot11MeshRetryTimeout,
351 u.mesh.mshcfg.dot11MeshRetryTimeout, DEC);
352IEEE80211_IF_FILE(dot11MeshConfirmTimeout,
353 u.mesh.mshcfg.dot11MeshConfirmTimeout, DEC);
354IEEE80211_IF_FILE(dot11MeshHoldingTimeout,
355 u.mesh.mshcfg.dot11MeshHoldingTimeout, DEC);
356IEEE80211_IF_FILE(dot11MeshTTL, u.mesh.mshcfg.dot11MeshTTL, DEC);
357IEEE80211_IF_FILE(element_ttl, u.mesh.mshcfg.element_ttl, DEC);
358IEEE80211_IF_FILE(auto_open_plinks, u.mesh.mshcfg.auto_open_plinks, DEC);
359IEEE80211_IF_FILE(dot11MeshMaxPeerLinks,
360 u.mesh.mshcfg.dot11MeshMaxPeerLinks, DEC);
361IEEE80211_IF_FILE(dot11MeshHWMPactivePathTimeout,
362 u.mesh.mshcfg.dot11MeshHWMPactivePathTimeout, DEC);
363IEEE80211_IF_FILE(dot11MeshHWMPpreqMinInterval,
364 u.mesh.mshcfg.dot11MeshHWMPpreqMinInterval, DEC);
365IEEE80211_IF_FILE(dot11MeshHWMPnetDiameterTraversalTime,
366 u.mesh.mshcfg.dot11MeshHWMPnetDiameterTraversalTime, DEC);
367IEEE80211_IF_FILE(dot11MeshHWMPmaxPREQretries,
368 u.mesh.mshcfg.dot11MeshHWMPmaxPREQretries, DEC);
369IEEE80211_IF_FILE(path_refresh_time,
370 u.mesh.mshcfg.path_refresh_time, DEC);
371IEEE80211_IF_FILE(min_discovery_timeout,
372 u.mesh.mshcfg.min_discovery_timeout, DEC);
373IEEE80211_IF_FILE(dot11MeshHWMPRootMode,
374 u.mesh.mshcfg.dot11MeshHWMPRootMode, DEC);
375#endif
376
377
378#define DEBUGFS_ADD(name) \
379 debugfs_create_file(#name, 0400, sdata->debugfs.dir, \
380 sdata, &name##_ops);
381
382#define DEBUGFS_ADD_MODE(name, mode) \
383 debugfs_create_file(#name, mode, sdata->debugfs.dir, \
384 sdata, &name##_ops);
385
386static void add_sta_files(struct ieee80211_sub_if_data *sdata)
387{
388 DEBUGFS_ADD(drop_unencrypted);
389 DEBUGFS_ADD(flags);
390 DEBUGFS_ADD(state);
391 DEBUGFS_ADD(channel_type);
392 DEBUGFS_ADD(rc_rateidx_mask_2ghz);
393 DEBUGFS_ADD(rc_rateidx_mask_5ghz);
394
395 DEBUGFS_ADD(bssid);
396 DEBUGFS_ADD(aid);
397 DEBUGFS_ADD(last_beacon);
398 DEBUGFS_ADD(ave_beacon);
399 DEBUGFS_ADD_MODE(smps, 0600);
400 DEBUGFS_ADD_MODE(tkip_mic_test, 0200);
401}
402
403static void add_ap_files(struct ieee80211_sub_if_data *sdata)
404{
405 DEBUGFS_ADD(drop_unencrypted);
406 DEBUGFS_ADD(flags);
407 DEBUGFS_ADD(state);
408 DEBUGFS_ADD(channel_type);
409 DEBUGFS_ADD(rc_rateidx_mask_2ghz);
410 DEBUGFS_ADD(rc_rateidx_mask_5ghz);
411
412 DEBUGFS_ADD(num_sta_ps);
413 DEBUGFS_ADD(dtim_count);
414 DEBUGFS_ADD(num_buffered_multicast);
415 DEBUGFS_ADD_MODE(tkip_mic_test, 0200);
416}
417
418static void add_wds_files(struct ieee80211_sub_if_data *sdata)
419{
420 DEBUGFS_ADD(drop_unencrypted);
421 DEBUGFS_ADD(flags);
422 DEBUGFS_ADD(state);
423 DEBUGFS_ADD(channel_type);
424 DEBUGFS_ADD(rc_rateidx_mask_2ghz);
425 DEBUGFS_ADD(rc_rateidx_mask_5ghz);
426
427 DEBUGFS_ADD(peer);
428}
429
430static void add_vlan_files(struct ieee80211_sub_if_data *sdata)
431{
432 DEBUGFS_ADD(drop_unencrypted);
433 DEBUGFS_ADD(flags);
434 DEBUGFS_ADD(state);
435 DEBUGFS_ADD(channel_type);
436 DEBUGFS_ADD(rc_rateidx_mask_2ghz);
437 DEBUGFS_ADD(rc_rateidx_mask_5ghz);
438}
439
440static void add_monitor_files(struct ieee80211_sub_if_data *sdata)
441{
442 DEBUGFS_ADD(flags);
443 DEBUGFS_ADD(state);
444 DEBUGFS_ADD(channel_type);
445}
446
447#ifdef CONFIG_MAC80211_MESH
448
449static void add_mesh_stats(struct ieee80211_sub_if_data *sdata)
450{
451 struct dentry *dir = debugfs_create_dir("mesh_stats",
452 sdata->debugfs.dir);
453
454#define MESHSTATS_ADD(name)\
455 debugfs_create_file(#name, 0400, dir, sdata, &name##_ops);
456
457 MESHSTATS_ADD(fwded_mcast);
458 MESHSTATS_ADD(fwded_unicast);
459 MESHSTATS_ADD(fwded_frames);
460 MESHSTATS_ADD(dropped_frames_ttl);
461 MESHSTATS_ADD(dropped_frames_no_route);
462 MESHSTATS_ADD(estab_plinks);
463#undef MESHSTATS_ADD
464}
465
466static void add_mesh_config(struct ieee80211_sub_if_data *sdata)
467{
468 struct dentry *dir = debugfs_create_dir("mesh_config",
469 sdata->debugfs.dir);
470
471#define MESHPARAMS_ADD(name) \
472 debugfs_create_file(#name, 0600, dir, sdata, &name##_ops);
473
474 MESHPARAMS_ADD(dot11MeshMaxRetries);
475 MESHPARAMS_ADD(dot11MeshRetryTimeout);
476 MESHPARAMS_ADD(dot11MeshConfirmTimeout);
477 MESHPARAMS_ADD(dot11MeshHoldingTimeout);
478 MESHPARAMS_ADD(dot11MeshTTL);
479 MESHPARAMS_ADD(element_ttl);
480 MESHPARAMS_ADD(auto_open_plinks);
481 MESHPARAMS_ADD(dot11MeshMaxPeerLinks);
482 MESHPARAMS_ADD(dot11MeshHWMPactivePathTimeout);
483 MESHPARAMS_ADD(dot11MeshHWMPpreqMinInterval);
484 MESHPARAMS_ADD(dot11MeshHWMPnetDiameterTraversalTime);
485 MESHPARAMS_ADD(dot11MeshHWMPmaxPREQretries);
486 MESHPARAMS_ADD(path_refresh_time);
487 MESHPARAMS_ADD(min_discovery_timeout);
488
489#undef MESHPARAMS_ADD
490}
491#endif
492
493static void add_files(struct ieee80211_sub_if_data *sdata)
494{
495 if (!sdata->debugfs.dir)
496 return;
497
498 switch (sdata->vif.type) {
499 case NL80211_IFTYPE_MESH_POINT:
500#ifdef CONFIG_MAC80211_MESH
501 add_mesh_stats(sdata);
502 add_mesh_config(sdata);
503#endif
504 break;
505 case NL80211_IFTYPE_STATION:
506 add_sta_files(sdata);
507 break;
508 case NL80211_IFTYPE_ADHOC:
509 /* XXX */
510 break;
511 case NL80211_IFTYPE_AP:
512 add_ap_files(sdata);
513 break;
514 case NL80211_IFTYPE_WDS:
515 add_wds_files(sdata);
516 break;
517 case NL80211_IFTYPE_MONITOR:
518 add_monitor_files(sdata);
519 break;
520 case NL80211_IFTYPE_AP_VLAN:
521 add_vlan_files(sdata);
522 break;
523 default:
524 break;
525 }
526}
527
528void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata)
529{
530 char buf[10+IFNAMSIZ];
531
532 sprintf(buf, "netdev:%s", sdata->name);
533 sdata->debugfs.dir = debugfs_create_dir(buf,
534 sdata->local->hw.wiphy->debugfsdir);
535 if (sdata->debugfs.dir)
536 sdata->debugfs.subdir_stations = debugfs_create_dir("stations",
537 sdata->debugfs.dir);
538 add_files(sdata);
539}
540
541void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata)
542{
543 if (!sdata->debugfs.dir)
544 return;
545
546 debugfs_remove_recursive(sdata->debugfs.dir);
547 sdata->debugfs.dir = NULL;
548}
549
550void ieee80211_debugfs_rename_netdev(struct ieee80211_sub_if_data *sdata)
551{
552 struct dentry *dir;
553 char buf[10 + IFNAMSIZ];
554
555 dir = sdata->debugfs.dir;
556
557 if (!dir)
558 return;
559
560 sprintf(buf, "netdev:%s", sdata->name);
561 if (!debugfs_rename(dir->d_parent, dir, dir->d_parent, buf))
562 printk(KERN_ERR "mac80211: debugfs: failed to rename debugfs "
563 "dir to %s\n", buf);
564}