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1/*
2 * Copyright 2003-2005 Devicescape Software, Inc.
3 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
4 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
5 * Copyright 2013-2014 Intel Mobile Communications GmbH
6 * Copyright(c) 2016 Intel Deutschland GmbH
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13#include <linux/debugfs.h>
14#include <linux/ieee80211.h>
15#include "ieee80211_i.h"
16#include "debugfs.h"
17#include "debugfs_sta.h"
18#include "sta_info.h"
19#include "driver-ops.h"
20
21/* sta attributtes */
22
23#define STA_READ(name, field, format_string) \
24static ssize_t sta_ ##name## _read(struct file *file, \
25 char __user *userbuf, \
26 size_t count, loff_t *ppos) \
27{ \
28 struct sta_info *sta = file->private_data; \
29 return mac80211_format_buffer(userbuf, count, ppos, \
30 format_string, sta->field); \
31}
32#define STA_READ_D(name, field) STA_READ(name, field, "%d\n")
33
34#define STA_OPS(name) \
35static const struct file_operations sta_ ##name## _ops = { \
36 .read = sta_##name##_read, \
37 .open = simple_open, \
38 .llseek = generic_file_llseek, \
39}
40
41#define STA_OPS_RW(name) \
42static const struct file_operations sta_ ##name## _ops = { \
43 .read = sta_##name##_read, \
44 .write = sta_##name##_write, \
45 .open = simple_open, \
46 .llseek = generic_file_llseek, \
47}
48
49#define STA_FILE(name, field, format) \
50 STA_READ_##format(name, field) \
51 STA_OPS(name)
52
53STA_FILE(aid, sta.aid, D);
54
55static const char * const sta_flag_names[] = {
56#define FLAG(F) [WLAN_STA_##F] = #F
57 FLAG(AUTH),
58 FLAG(ASSOC),
59 FLAG(PS_STA),
60 FLAG(AUTHORIZED),
61 FLAG(SHORT_PREAMBLE),
62 FLAG(WDS),
63 FLAG(CLEAR_PS_FILT),
64 FLAG(MFP),
65 FLAG(BLOCK_BA),
66 FLAG(PS_DRIVER),
67 FLAG(PSPOLL),
68 FLAG(TDLS_PEER),
69 FLAG(TDLS_PEER_AUTH),
70 FLAG(TDLS_INITIATOR),
71 FLAG(TDLS_CHAN_SWITCH),
72 FLAG(TDLS_OFF_CHANNEL),
73 FLAG(TDLS_WIDER_BW),
74 FLAG(UAPSD),
75 FLAG(SP),
76 FLAG(4ADDR_EVENT),
77 FLAG(INSERTED),
78 FLAG(RATE_CONTROL),
79 FLAG(TOFFSET_KNOWN),
80 FLAG(MPSP_OWNER),
81 FLAG(MPSP_RECIPIENT),
82 FLAG(PS_DELIVER),
83#undef FLAG
84};
85
86static ssize_t sta_flags_read(struct file *file, char __user *userbuf,
87 size_t count, loff_t *ppos)
88{
89 char buf[16 * NUM_WLAN_STA_FLAGS], *pos = buf;
90 char *end = buf + sizeof(buf) - 1;
91 struct sta_info *sta = file->private_data;
92 unsigned int flg;
93
94 BUILD_BUG_ON(ARRAY_SIZE(sta_flag_names) != NUM_WLAN_STA_FLAGS);
95
96 for (flg = 0; flg < NUM_WLAN_STA_FLAGS; flg++) {
97 if (test_sta_flag(sta, flg))
98 pos += scnprintf(pos, end - pos, "%s\n",
99 sta_flag_names[flg]);
100 }
101
102 return simple_read_from_buffer(userbuf, count, ppos, buf, strlen(buf));
103}
104STA_OPS(flags);
105
106static ssize_t sta_num_ps_buf_frames_read(struct file *file,
107 char __user *userbuf,
108 size_t count, loff_t *ppos)
109{
110 struct sta_info *sta = file->private_data;
111 char buf[17*IEEE80211_NUM_ACS], *p = buf;
112 int ac;
113
114 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
115 p += scnprintf(p, sizeof(buf)+buf-p, "AC%d: %d\n", ac,
116 skb_queue_len(&sta->ps_tx_buf[ac]) +
117 skb_queue_len(&sta->tx_filtered[ac]));
118 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
119}
120STA_OPS(num_ps_buf_frames);
121
122static ssize_t sta_last_seq_ctrl_read(struct file *file, char __user *userbuf,
123 size_t count, loff_t *ppos)
124{
125 char buf[15*IEEE80211_NUM_TIDS], *p = buf;
126 int i;
127 struct sta_info *sta = file->private_data;
128 for (i = 0; i < IEEE80211_NUM_TIDS; i++)
129 p += scnprintf(p, sizeof(buf)+buf-p, "%x ",
130 le16_to_cpu(sta->last_seq_ctrl[i]));
131 p += scnprintf(p, sizeof(buf)+buf-p, "\n");
132 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
133}
134STA_OPS(last_seq_ctrl);
135
136#define AQM_TXQ_ENTRY_LEN 130
137
138static ssize_t sta_aqm_read(struct file *file, char __user *userbuf,
139 size_t count, loff_t *ppos)
140{
141 struct sta_info *sta = file->private_data;
142 struct ieee80211_local *local = sta->local;
143 size_t bufsz = AQM_TXQ_ENTRY_LEN*(IEEE80211_NUM_TIDS+1);
144 char *buf = kzalloc(bufsz, GFP_KERNEL), *p = buf;
145 struct txq_info *txqi;
146 ssize_t rv;
147 int i;
148
149 if (!buf)
150 return -ENOMEM;
151
152 spin_lock_bh(&local->fq.lock);
153 rcu_read_lock();
154
155 p += scnprintf(p,
156 bufsz+buf-p,
157 "tid ac backlog-bytes backlog-packets new-flows drops marks overlimit collisions tx-bytes tx-packets\n");
158
159 for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
160 txqi = to_txq_info(sta->sta.txq[i]);
161 p += scnprintf(p, bufsz+buf-p,
162 "%d %d %u %u %u %u %u %u %u %u %u\n",
163 txqi->txq.tid,
164 txqi->txq.ac,
165 txqi->tin.backlog_bytes,
166 txqi->tin.backlog_packets,
167 txqi->tin.flows,
168 txqi->cstats.drop_count,
169 txqi->cstats.ecn_mark,
170 txqi->tin.overlimit,
171 txqi->tin.collisions,
172 txqi->tin.tx_bytes,
173 txqi->tin.tx_packets);
174 }
175
176 rcu_read_unlock();
177 spin_unlock_bh(&local->fq.lock);
178
179 rv = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
180 kfree(buf);
181 return rv;
182}
183STA_OPS(aqm);
184
185static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf,
186 size_t count, loff_t *ppos)
187{
188 char buf[71 + IEEE80211_NUM_TIDS * 40], *p = buf;
189 int i;
190 struct sta_info *sta = file->private_data;
191 struct tid_ampdu_rx *tid_rx;
192 struct tid_ampdu_tx *tid_tx;
193
194 rcu_read_lock();
195
196 p += scnprintf(p, sizeof(buf) + buf - p, "next dialog_token: %#02x\n",
197 sta->ampdu_mlme.dialog_token_allocator + 1);
198 p += scnprintf(p, sizeof(buf) + buf - p,
199 "TID\t\tRX\tDTKN\tSSN\t\tTX\tDTKN\tpending\n");
200
201 for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
202 bool tid_rx_valid;
203
204 tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[i]);
205 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[i]);
206 tid_rx_valid = test_bit(i, sta->ampdu_mlme.agg_session_valid);
207
208 p += scnprintf(p, sizeof(buf) + buf - p, "%02d", i);
209 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x",
210 tid_rx_valid);
211 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
212 tid_rx_valid ?
213 sta->ampdu_mlme.tid_rx_token[i] : 0);
214 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x",
215 tid_rx ? tid_rx->ssn : 0);
216
217 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_tx);
218 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
219 tid_tx ? tid_tx->dialog_token : 0);
220 p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d",
221 tid_tx ? skb_queue_len(&tid_tx->pending) : 0);
222 p += scnprintf(p, sizeof(buf) + buf - p, "\n");
223 }
224 rcu_read_unlock();
225
226 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
227}
228
229static ssize_t sta_agg_status_write(struct file *file, const char __user *userbuf,
230 size_t count, loff_t *ppos)
231{
232 char _buf[25] = {}, *buf = _buf;
233 struct sta_info *sta = file->private_data;
234 bool start, tx;
235 unsigned long tid;
236 char *pos;
237 int ret, timeout = 5000;
238
239 if (count > sizeof(_buf))
240 return -EINVAL;
241
242 if (copy_from_user(buf, userbuf, count))
243 return -EFAULT;
244
245 buf[sizeof(_buf) - 1] = '\0';
246 pos = buf;
247 buf = strsep(&pos, " ");
248 if (!buf)
249 return -EINVAL;
250
251 if (!strcmp(buf, "tx"))
252 tx = true;
253 else if (!strcmp(buf, "rx"))
254 tx = false;
255 else
256 return -EINVAL;
257
258 buf = strsep(&pos, " ");
259 if (!buf)
260 return -EINVAL;
261 if (!strcmp(buf, "start")) {
262 start = true;
263 if (!tx)
264 return -EINVAL;
265 } else if (!strcmp(buf, "stop")) {
266 start = false;
267 } else {
268 return -EINVAL;
269 }
270
271 buf = strsep(&pos, " ");
272 if (!buf)
273 return -EINVAL;
274 if (sscanf(buf, "timeout=%d", &timeout) == 1) {
275 buf = strsep(&pos, " ");
276 if (!buf || !tx || !start)
277 return -EINVAL;
278 }
279
280 ret = kstrtoul(buf, 0, &tid);
281 if (ret || tid >= IEEE80211_NUM_TIDS)
282 return -EINVAL;
283
284 if (tx) {
285 if (start)
286 ret = ieee80211_start_tx_ba_session(&sta->sta, tid,
287 timeout);
288 else
289 ret = ieee80211_stop_tx_ba_session(&sta->sta, tid);
290 } else {
291 __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT,
292 3, true);
293 ret = 0;
294 }
295
296 return ret ?: count;
297}
298STA_OPS_RW(agg_status);
299
300static ssize_t sta_ht_capa_read(struct file *file, char __user *userbuf,
301 size_t count, loff_t *ppos)
302{
303#define PRINT_HT_CAP(_cond, _str) \
304 do { \
305 if (_cond) \
306 p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \
307 } while (0)
308 char buf[512], *p = buf;
309 int i;
310 struct sta_info *sta = file->private_data;
311 struct ieee80211_sta_ht_cap *htc = &sta->sta.ht_cap;
312
313 p += scnprintf(p, sizeof(buf) + buf - p, "ht %ssupported\n",
314 htc->ht_supported ? "" : "not ");
315 if (htc->ht_supported) {
316 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.4x\n", htc->cap);
317
318 PRINT_HT_CAP((htc->cap & BIT(0)), "RX LDPC");
319 PRINT_HT_CAP((htc->cap & BIT(1)), "HT20/HT40");
320 PRINT_HT_CAP(!(htc->cap & BIT(1)), "HT20");
321
322 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 0, "Static SM Power Save");
323 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 1, "Dynamic SM Power Save");
324 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 3, "SM Power Save disabled");
325
326 PRINT_HT_CAP((htc->cap & BIT(4)), "RX Greenfield");
327 PRINT_HT_CAP((htc->cap & BIT(5)), "RX HT20 SGI");
328 PRINT_HT_CAP((htc->cap & BIT(6)), "RX HT40 SGI");
329 PRINT_HT_CAP((htc->cap & BIT(7)), "TX STBC");
330
331 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 0, "No RX STBC");
332 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 1, "RX STBC 1-stream");
333 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 2, "RX STBC 2-streams");
334 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 3, "RX STBC 3-streams");
335
336 PRINT_HT_CAP((htc->cap & BIT(10)), "HT Delayed Block Ack");
337
338 PRINT_HT_CAP(!(htc->cap & BIT(11)), "Max AMSDU length: "
339 "3839 bytes");
340 PRINT_HT_CAP((htc->cap & BIT(11)), "Max AMSDU length: "
341 "7935 bytes");
342
343 /*
344 * For beacons and probe response this would mean the BSS
345 * does or does not allow the usage of DSSS/CCK HT40.
346 * Otherwise it means the STA does or does not use
347 * DSSS/CCK HT40.
348 */
349 PRINT_HT_CAP((htc->cap & BIT(12)), "DSSS/CCK HT40");
350 PRINT_HT_CAP(!(htc->cap & BIT(12)), "No DSSS/CCK HT40");
351
352 /* BIT(13) is reserved */
353
354 PRINT_HT_CAP((htc->cap & BIT(14)), "40 MHz Intolerant");
355
356 PRINT_HT_CAP((htc->cap & BIT(15)), "L-SIG TXOP protection");
357
358 p += scnprintf(p, sizeof(buf)+buf-p, "ampdu factor/density: %d/%d\n",
359 htc->ampdu_factor, htc->ampdu_density);
360 p += scnprintf(p, sizeof(buf)+buf-p, "MCS mask:");
361
362 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
363 p += scnprintf(p, sizeof(buf)+buf-p, " %.2x",
364 htc->mcs.rx_mask[i]);
365 p += scnprintf(p, sizeof(buf)+buf-p, "\n");
366
367 /* If not set this is meaningless */
368 if (le16_to_cpu(htc->mcs.rx_highest)) {
369 p += scnprintf(p, sizeof(buf)+buf-p,
370 "MCS rx highest: %d Mbps\n",
371 le16_to_cpu(htc->mcs.rx_highest));
372 }
373
374 p += scnprintf(p, sizeof(buf)+buf-p, "MCS tx params: %x\n",
375 htc->mcs.tx_params);
376 }
377
378 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
379}
380STA_OPS(ht_capa);
381
382static ssize_t sta_vht_capa_read(struct file *file, char __user *userbuf,
383 size_t count, loff_t *ppos)
384{
385 char buf[512], *p = buf;
386 struct sta_info *sta = file->private_data;
387 struct ieee80211_sta_vht_cap *vhtc = &sta->sta.vht_cap;
388
389 p += scnprintf(p, sizeof(buf) + buf - p, "VHT %ssupported\n",
390 vhtc->vht_supported ? "" : "not ");
391 if (vhtc->vht_supported) {
392 p += scnprintf(p, sizeof(buf) + buf - p, "cap: %#.8x\n",
393 vhtc->cap);
394#define PFLAG(a, b) \
395 do { \
396 if (vhtc->cap & IEEE80211_VHT_CAP_ ## a) \
397 p += scnprintf(p, sizeof(buf) + buf - p, \
398 "\t\t%s\n", b); \
399 } while (0)
400
401 switch (vhtc->cap & 0x3) {
402 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895:
403 p += scnprintf(p, sizeof(buf) + buf - p,
404 "\t\tMAX-MPDU-3895\n");
405 break;
406 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991:
407 p += scnprintf(p, sizeof(buf) + buf - p,
408 "\t\tMAX-MPDU-7991\n");
409 break;
410 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454:
411 p += scnprintf(p, sizeof(buf) + buf - p,
412 "\t\tMAX-MPDU-11454\n");
413 break;
414 default:
415 p += scnprintf(p, sizeof(buf) + buf - p,
416 "\t\tMAX-MPDU-UNKNOWN\n");
417 };
418 switch (vhtc->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) {
419 case 0:
420 p += scnprintf(p, sizeof(buf) + buf - p,
421 "\t\t80Mhz\n");
422 break;
423 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ:
424 p += scnprintf(p, sizeof(buf) + buf - p,
425 "\t\t160Mhz\n");
426 break;
427 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ:
428 p += scnprintf(p, sizeof(buf) + buf - p,
429 "\t\t80+80Mhz\n");
430 break;
431 default:
432 p += scnprintf(p, sizeof(buf) + buf - p,
433 "\t\tUNKNOWN-MHZ: 0x%x\n",
434 (vhtc->cap >> 2) & 0x3);
435 };
436 PFLAG(RXLDPC, "RXLDPC");
437 PFLAG(SHORT_GI_80, "SHORT-GI-80");
438 PFLAG(SHORT_GI_160, "SHORT-GI-160");
439 PFLAG(TXSTBC, "TXSTBC");
440 p += scnprintf(p, sizeof(buf) + buf - p,
441 "\t\tRXSTBC_%d\n", (vhtc->cap >> 8) & 0x7);
442 PFLAG(SU_BEAMFORMER_CAPABLE, "SU-BEAMFORMER-CAPABLE");
443 PFLAG(SU_BEAMFORMEE_CAPABLE, "SU-BEAMFORMEE-CAPABLE");
444 p += scnprintf(p, sizeof(buf) + buf - p,
445 "\t\tBEAMFORMEE-STS: 0x%x\n",
446 (vhtc->cap & IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK) >>
447 IEEE80211_VHT_CAP_BEAMFORMEE_STS_SHIFT);
448 p += scnprintf(p, sizeof(buf) + buf - p,
449 "\t\tSOUNDING-DIMENSIONS: 0x%x\n",
450 (vhtc->cap & IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_MASK)
451 >> IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_SHIFT);
452 PFLAG(MU_BEAMFORMER_CAPABLE, "MU-BEAMFORMER-CAPABLE");
453 PFLAG(MU_BEAMFORMEE_CAPABLE, "MU-BEAMFORMEE-CAPABLE");
454 PFLAG(VHT_TXOP_PS, "TXOP-PS");
455 PFLAG(HTC_VHT, "HTC-VHT");
456 p += scnprintf(p, sizeof(buf) + buf - p,
457 "\t\tMPDU-LENGTH-EXPONENT: 0x%x\n",
458 (vhtc->cap & IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK) >>
459 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT);
460 PFLAG(VHT_LINK_ADAPTATION_VHT_UNSOL_MFB,
461 "LINK-ADAPTATION-VHT-UNSOL-MFB");
462 p += scnprintf(p, sizeof(buf) + buf - p,
463 "\t\tLINK-ADAPTATION-VHT-MRQ-MFB: 0x%x\n",
464 (vhtc->cap & IEEE80211_VHT_CAP_VHT_LINK_ADAPTATION_VHT_MRQ_MFB) >> 26);
465 PFLAG(RX_ANTENNA_PATTERN, "RX-ANTENNA-PATTERN");
466 PFLAG(TX_ANTENNA_PATTERN, "TX-ANTENNA-PATTERN");
467
468 p += scnprintf(p, sizeof(buf)+buf-p, "RX MCS: %.4x\n",
469 le16_to_cpu(vhtc->vht_mcs.rx_mcs_map));
470 if (vhtc->vht_mcs.rx_highest)
471 p += scnprintf(p, sizeof(buf)+buf-p,
472 "MCS RX highest: %d Mbps\n",
473 le16_to_cpu(vhtc->vht_mcs.rx_highest));
474 p += scnprintf(p, sizeof(buf)+buf-p, "TX MCS: %.4x\n",
475 le16_to_cpu(vhtc->vht_mcs.tx_mcs_map));
476 if (vhtc->vht_mcs.tx_highest)
477 p += scnprintf(p, sizeof(buf)+buf-p,
478 "MCS TX highest: %d Mbps\n",
479 le16_to_cpu(vhtc->vht_mcs.tx_highest));
480 }
481
482 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
483}
484STA_OPS(vht_capa);
485
486
487#define DEBUGFS_ADD(name) \
488 debugfs_create_file(#name, 0400, \
489 sta->debugfs_dir, sta, &sta_ ##name## _ops);
490
491#define DEBUGFS_ADD_COUNTER(name, field) \
492 if (sizeof(sta->field) == sizeof(u32)) \
493 debugfs_create_u32(#name, 0400, sta->debugfs_dir, \
494 (u32 *) &sta->field); \
495 else \
496 debugfs_create_u64(#name, 0400, sta->debugfs_dir, \
497 (u64 *) &sta->field);
498
499void ieee80211_sta_debugfs_add(struct sta_info *sta)
500{
501 struct ieee80211_local *local = sta->local;
502 struct ieee80211_sub_if_data *sdata = sta->sdata;
503 struct dentry *stations_dir = sta->sdata->debugfs.subdir_stations;
504 u8 mac[3*ETH_ALEN];
505
506 if (!stations_dir)
507 return;
508
509 snprintf(mac, sizeof(mac), "%pM", sta->sta.addr);
510
511 /*
512 * This might fail due to a race condition:
513 * When mac80211 unlinks a station, the debugfs entries
514 * remain, but it is already possible to link a new
515 * station with the same address which triggers adding
516 * it to debugfs; therefore, if the old station isn't
517 * destroyed quickly enough the old station's debugfs
518 * dir might still be around.
519 */
520 sta->debugfs_dir = debugfs_create_dir(mac, stations_dir);
521 if (!sta->debugfs_dir)
522 return;
523
524 DEBUGFS_ADD(flags);
525 DEBUGFS_ADD(num_ps_buf_frames);
526 DEBUGFS_ADD(last_seq_ctrl);
527 DEBUGFS_ADD(agg_status);
528 DEBUGFS_ADD(ht_capa);
529 DEBUGFS_ADD(vht_capa);
530
531 DEBUGFS_ADD_COUNTER(rx_duplicates, rx_stats.num_duplicates);
532 DEBUGFS_ADD_COUNTER(rx_fragments, rx_stats.fragments);
533 DEBUGFS_ADD_COUNTER(tx_filtered, status_stats.filtered);
534
535 if (local->ops->wake_tx_queue)
536 DEBUGFS_ADD(aqm);
537
538 if (sizeof(sta->driver_buffered_tids) == sizeof(u32))
539 debugfs_create_x32("driver_buffered_tids", 0400,
540 sta->debugfs_dir,
541 (u32 *)&sta->driver_buffered_tids);
542 else
543 debugfs_create_x64("driver_buffered_tids", 0400,
544 sta->debugfs_dir,
545 (u64 *)&sta->driver_buffered_tids);
546
547 drv_sta_add_debugfs(local, sdata, &sta->sta, sta->debugfs_dir);
548}
549
550void ieee80211_sta_debugfs_remove(struct sta_info *sta)
551{
552 debugfs_remove_recursive(sta->debugfs_dir);
553 sta->debugfs_dir = NULL;
554}
1/*
2 * Copyright 2003-2005 Devicescape Software, Inc.
3 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
4 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
5 * Copyright 2013-2014 Intel Mobile Communications GmbH
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11
12#include <linux/debugfs.h>
13#include <linux/ieee80211.h>
14#include "ieee80211_i.h"
15#include "debugfs.h"
16#include "debugfs_sta.h"
17#include "sta_info.h"
18#include "driver-ops.h"
19
20/* sta attributtes */
21
22#define STA_READ(name, field, format_string) \
23static ssize_t sta_ ##name## _read(struct file *file, \
24 char __user *userbuf, \
25 size_t count, loff_t *ppos) \
26{ \
27 struct sta_info *sta = file->private_data; \
28 return mac80211_format_buffer(userbuf, count, ppos, \
29 format_string, sta->field); \
30}
31#define STA_READ_D(name, field) STA_READ(name, field, "%d\n")
32
33#define STA_OPS(name) \
34static const struct file_operations sta_ ##name## _ops = { \
35 .read = sta_##name##_read, \
36 .open = simple_open, \
37 .llseek = generic_file_llseek, \
38}
39
40#define STA_OPS_RW(name) \
41static const struct file_operations sta_ ##name## _ops = { \
42 .read = sta_##name##_read, \
43 .write = sta_##name##_write, \
44 .open = simple_open, \
45 .llseek = generic_file_llseek, \
46}
47
48#define STA_FILE(name, field, format) \
49 STA_READ_##format(name, field) \
50 STA_OPS(name)
51
52STA_FILE(aid, sta.aid, D);
53
54static ssize_t sta_flags_read(struct file *file, char __user *userbuf,
55 size_t count, loff_t *ppos)
56{
57 char buf[121];
58 struct sta_info *sta = file->private_data;
59
60#define TEST(flg) \
61 test_sta_flag(sta, WLAN_STA_##flg) ? #flg "\n" : ""
62
63 int res = scnprintf(buf, sizeof(buf),
64 "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
65 TEST(AUTH), TEST(ASSOC), TEST(PS_STA),
66 TEST(PS_DRIVER), TEST(AUTHORIZED),
67 TEST(SHORT_PREAMBLE),
68 sta->sta.wme ? "WME\n" : "",
69 TEST(WDS), TEST(CLEAR_PS_FILT),
70 TEST(MFP), TEST(BLOCK_BA), TEST(PSPOLL),
71 TEST(UAPSD), TEST(SP), TEST(TDLS_PEER),
72 TEST(TDLS_PEER_AUTH), TEST(TDLS_INITIATOR),
73 TEST(TDLS_CHAN_SWITCH), TEST(TDLS_OFF_CHANNEL),
74 TEST(4ADDR_EVENT), TEST(INSERTED),
75 TEST(RATE_CONTROL), TEST(TOFFSET_KNOWN),
76 TEST(MPSP_OWNER), TEST(MPSP_RECIPIENT));
77#undef TEST
78 return simple_read_from_buffer(userbuf, count, ppos, buf, res);
79}
80STA_OPS(flags);
81
82static ssize_t sta_num_ps_buf_frames_read(struct file *file,
83 char __user *userbuf,
84 size_t count, loff_t *ppos)
85{
86 struct sta_info *sta = file->private_data;
87 char buf[17*IEEE80211_NUM_ACS], *p = buf;
88 int ac;
89
90 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
91 p += scnprintf(p, sizeof(buf)+buf-p, "AC%d: %d\n", ac,
92 skb_queue_len(&sta->ps_tx_buf[ac]) +
93 skb_queue_len(&sta->tx_filtered[ac]));
94 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
95}
96STA_OPS(num_ps_buf_frames);
97
98static ssize_t sta_last_seq_ctrl_read(struct file *file, char __user *userbuf,
99 size_t count, loff_t *ppos)
100{
101 char buf[15*IEEE80211_NUM_TIDS], *p = buf;
102 int i;
103 struct sta_info *sta = file->private_data;
104 for (i = 0; i < IEEE80211_NUM_TIDS; i++)
105 p += scnprintf(p, sizeof(buf)+buf-p, "%x ",
106 le16_to_cpu(sta->last_seq_ctrl[i]));
107 p += scnprintf(p, sizeof(buf)+buf-p, "\n");
108 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
109}
110STA_OPS(last_seq_ctrl);
111
112static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf,
113 size_t count, loff_t *ppos)
114{
115 char buf[71 + IEEE80211_NUM_TIDS * 40], *p = buf;
116 int i;
117 struct sta_info *sta = file->private_data;
118 struct tid_ampdu_rx *tid_rx;
119 struct tid_ampdu_tx *tid_tx;
120
121 rcu_read_lock();
122
123 p += scnprintf(p, sizeof(buf) + buf - p, "next dialog_token: %#02x\n",
124 sta->ampdu_mlme.dialog_token_allocator + 1);
125 p += scnprintf(p, sizeof(buf) + buf - p,
126 "TID\t\tRX\tDTKN\tSSN\t\tTX\tDTKN\tpending\n");
127
128 for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
129 tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[i]);
130 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[i]);
131
132 p += scnprintf(p, sizeof(buf) + buf - p, "%02d", i);
133 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_rx);
134 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
135 tid_rx ? tid_rx->dialog_token : 0);
136 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x",
137 tid_rx ? tid_rx->ssn : 0);
138
139 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_tx);
140 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
141 tid_tx ? tid_tx->dialog_token : 0);
142 p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d",
143 tid_tx ? skb_queue_len(&tid_tx->pending) : 0);
144 p += scnprintf(p, sizeof(buf) + buf - p, "\n");
145 }
146 rcu_read_unlock();
147
148 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
149}
150
151static ssize_t sta_agg_status_write(struct file *file, const char __user *userbuf,
152 size_t count, loff_t *ppos)
153{
154 char _buf[12] = {}, *buf = _buf;
155 struct sta_info *sta = file->private_data;
156 bool start, tx;
157 unsigned long tid;
158 int ret;
159
160 if (count > sizeof(_buf))
161 return -EINVAL;
162
163 if (copy_from_user(buf, userbuf, count))
164 return -EFAULT;
165
166 buf[sizeof(_buf) - 1] = '\0';
167
168 if (strncmp(buf, "tx ", 3) == 0) {
169 buf += 3;
170 tx = true;
171 } else if (strncmp(buf, "rx ", 3) == 0) {
172 buf += 3;
173 tx = false;
174 } else
175 return -EINVAL;
176
177 if (strncmp(buf, "start ", 6) == 0) {
178 buf += 6;
179 start = true;
180 if (!tx)
181 return -EINVAL;
182 } else if (strncmp(buf, "stop ", 5) == 0) {
183 buf += 5;
184 start = false;
185 } else
186 return -EINVAL;
187
188 ret = kstrtoul(buf, 0, &tid);
189 if (ret)
190 return ret;
191
192 if (tid >= IEEE80211_NUM_TIDS)
193 return -EINVAL;
194
195 if (tx) {
196 if (start)
197 ret = ieee80211_start_tx_ba_session(&sta->sta, tid, 5000);
198 else
199 ret = ieee80211_stop_tx_ba_session(&sta->sta, tid);
200 } else {
201 __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT,
202 3, true);
203 ret = 0;
204 }
205
206 return ret ?: count;
207}
208STA_OPS_RW(agg_status);
209
210static ssize_t sta_ht_capa_read(struct file *file, char __user *userbuf,
211 size_t count, loff_t *ppos)
212{
213#define PRINT_HT_CAP(_cond, _str) \
214 do { \
215 if (_cond) \
216 p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \
217 } while (0)
218 char buf[512], *p = buf;
219 int i;
220 struct sta_info *sta = file->private_data;
221 struct ieee80211_sta_ht_cap *htc = &sta->sta.ht_cap;
222
223 p += scnprintf(p, sizeof(buf) + buf - p, "ht %ssupported\n",
224 htc->ht_supported ? "" : "not ");
225 if (htc->ht_supported) {
226 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.4x\n", htc->cap);
227
228 PRINT_HT_CAP((htc->cap & BIT(0)), "RX LDPC");
229 PRINT_HT_CAP((htc->cap & BIT(1)), "HT20/HT40");
230 PRINT_HT_CAP(!(htc->cap & BIT(1)), "HT20");
231
232 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 0, "Static SM Power Save");
233 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 1, "Dynamic SM Power Save");
234 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 3, "SM Power Save disabled");
235
236 PRINT_HT_CAP((htc->cap & BIT(4)), "RX Greenfield");
237 PRINT_HT_CAP((htc->cap & BIT(5)), "RX HT20 SGI");
238 PRINT_HT_CAP((htc->cap & BIT(6)), "RX HT40 SGI");
239 PRINT_HT_CAP((htc->cap & BIT(7)), "TX STBC");
240
241 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 0, "No RX STBC");
242 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 1, "RX STBC 1-stream");
243 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 2, "RX STBC 2-streams");
244 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 3, "RX STBC 3-streams");
245
246 PRINT_HT_CAP((htc->cap & BIT(10)), "HT Delayed Block Ack");
247
248 PRINT_HT_CAP(!(htc->cap & BIT(11)), "Max AMSDU length: "
249 "3839 bytes");
250 PRINT_HT_CAP((htc->cap & BIT(11)), "Max AMSDU length: "
251 "7935 bytes");
252
253 /*
254 * For beacons and probe response this would mean the BSS
255 * does or does not allow the usage of DSSS/CCK HT40.
256 * Otherwise it means the STA does or does not use
257 * DSSS/CCK HT40.
258 */
259 PRINT_HT_CAP((htc->cap & BIT(12)), "DSSS/CCK HT40");
260 PRINT_HT_CAP(!(htc->cap & BIT(12)), "No DSSS/CCK HT40");
261
262 /* BIT(13) is reserved */
263
264 PRINT_HT_CAP((htc->cap & BIT(14)), "40 MHz Intolerant");
265
266 PRINT_HT_CAP((htc->cap & BIT(15)), "L-SIG TXOP protection");
267
268 p += scnprintf(p, sizeof(buf)+buf-p, "ampdu factor/density: %d/%d\n",
269 htc->ampdu_factor, htc->ampdu_density);
270 p += scnprintf(p, sizeof(buf)+buf-p, "MCS mask:");
271
272 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
273 p += scnprintf(p, sizeof(buf)+buf-p, " %.2x",
274 htc->mcs.rx_mask[i]);
275 p += scnprintf(p, sizeof(buf)+buf-p, "\n");
276
277 /* If not set this is meaningless */
278 if (le16_to_cpu(htc->mcs.rx_highest)) {
279 p += scnprintf(p, sizeof(buf)+buf-p,
280 "MCS rx highest: %d Mbps\n",
281 le16_to_cpu(htc->mcs.rx_highest));
282 }
283
284 p += scnprintf(p, sizeof(buf)+buf-p, "MCS tx params: %x\n",
285 htc->mcs.tx_params);
286 }
287
288 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
289}
290STA_OPS(ht_capa);
291
292static ssize_t sta_vht_capa_read(struct file *file, char __user *userbuf,
293 size_t count, loff_t *ppos)
294{
295 char buf[128], *p = buf;
296 struct sta_info *sta = file->private_data;
297 struct ieee80211_sta_vht_cap *vhtc = &sta->sta.vht_cap;
298
299 p += scnprintf(p, sizeof(buf) + buf - p, "VHT %ssupported\n",
300 vhtc->vht_supported ? "" : "not ");
301 if (vhtc->vht_supported) {
302 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.8x\n", vhtc->cap);
303
304 p += scnprintf(p, sizeof(buf)+buf-p, "RX MCS: %.4x\n",
305 le16_to_cpu(vhtc->vht_mcs.rx_mcs_map));
306 if (vhtc->vht_mcs.rx_highest)
307 p += scnprintf(p, sizeof(buf)+buf-p,
308 "MCS RX highest: %d Mbps\n",
309 le16_to_cpu(vhtc->vht_mcs.rx_highest));
310 p += scnprintf(p, sizeof(buf)+buf-p, "TX MCS: %.4x\n",
311 le16_to_cpu(vhtc->vht_mcs.tx_mcs_map));
312 if (vhtc->vht_mcs.tx_highest)
313 p += scnprintf(p, sizeof(buf)+buf-p,
314 "MCS TX highest: %d Mbps\n",
315 le16_to_cpu(vhtc->vht_mcs.tx_highest));
316 }
317
318 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
319}
320STA_OPS(vht_capa);
321
322
323#define DEBUGFS_ADD(name) \
324 debugfs_create_file(#name, 0400, \
325 sta->debugfs.dir, sta, &sta_ ##name## _ops);
326
327#define DEBUGFS_ADD_COUNTER(name, field) \
328 if (sizeof(sta->field) == sizeof(u32)) \
329 debugfs_create_u32(#name, 0400, sta->debugfs.dir, \
330 (u32 *) &sta->field); \
331 else \
332 debugfs_create_u64(#name, 0400, sta->debugfs.dir, \
333 (u64 *) &sta->field);
334
335void ieee80211_sta_debugfs_add(struct sta_info *sta)
336{
337 struct ieee80211_local *local = sta->local;
338 struct ieee80211_sub_if_data *sdata = sta->sdata;
339 struct dentry *stations_dir = sta->sdata->debugfs.subdir_stations;
340 u8 mac[3*ETH_ALEN];
341
342 sta->debugfs.add_has_run = true;
343
344 if (!stations_dir)
345 return;
346
347 snprintf(mac, sizeof(mac), "%pM", sta->sta.addr);
348
349 /*
350 * This might fail due to a race condition:
351 * When mac80211 unlinks a station, the debugfs entries
352 * remain, but it is already possible to link a new
353 * station with the same address which triggers adding
354 * it to debugfs; therefore, if the old station isn't
355 * destroyed quickly enough the old station's debugfs
356 * dir might still be around.
357 */
358 sta->debugfs.dir = debugfs_create_dir(mac, stations_dir);
359 if (!sta->debugfs.dir)
360 return;
361
362 DEBUGFS_ADD(flags);
363 DEBUGFS_ADD(num_ps_buf_frames);
364 DEBUGFS_ADD(last_seq_ctrl);
365 DEBUGFS_ADD(agg_status);
366 DEBUGFS_ADD(ht_capa);
367 DEBUGFS_ADD(vht_capa);
368
369 DEBUGFS_ADD_COUNTER(rx_duplicates, rx_stats.num_duplicates);
370 DEBUGFS_ADD_COUNTER(rx_fragments, rx_stats.fragments);
371 DEBUGFS_ADD_COUNTER(tx_filtered, status_stats.filtered);
372
373 if (sizeof(sta->driver_buffered_tids) == sizeof(u32))
374 debugfs_create_x32("driver_buffered_tids", 0400,
375 sta->debugfs.dir,
376 (u32 *)&sta->driver_buffered_tids);
377 else
378 debugfs_create_x64("driver_buffered_tids", 0400,
379 sta->debugfs.dir,
380 (u64 *)&sta->driver_buffered_tids);
381
382 drv_sta_add_debugfs(local, sdata, &sta->sta, sta->debugfs.dir);
383}
384
385void ieee80211_sta_debugfs_remove(struct sta_info *sta)
386{
387 struct ieee80211_local *local = sta->local;
388 struct ieee80211_sub_if_data *sdata = sta->sdata;
389
390 drv_sta_remove_debugfs(local, sdata, &sta->sta, sta->debugfs.dir);
391 debugfs_remove_recursive(sta->debugfs.dir);
392 sta->debugfs.dir = NULL;
393}