1
2
3
4
5
6
7
8
9
10
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
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
345
346
347
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
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
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
513
514
515
516
517
518
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(aid);
526 DEBUGFS_ADD(num_ps_buf_frames);
527 DEBUGFS_ADD(last_seq_ctrl);
528 DEBUGFS_ADD(agg_status);
529 DEBUGFS_ADD(ht_capa);
530 DEBUGFS_ADD(vht_capa);
531
532 DEBUGFS_ADD_COUNTER(rx_duplicates, rx_stats.num_duplicates);
533 DEBUGFS_ADD_COUNTER(rx_fragments, rx_stats.fragments);
534 DEBUGFS_ADD_COUNTER(tx_filtered, status_stats.filtered);
535
536 if (local->ops->wake_tx_queue)
537 DEBUGFS_ADD(aqm);
538
539 if (sizeof(sta->driver_buffered_tids) == sizeof(u32))
540 debugfs_create_x32("driver_buffered_tids", 0400,
541 sta->debugfs_dir,
542 (u32 *)&sta->driver_buffered_tids);
543 else
544 debugfs_create_x64("driver_buffered_tids", 0400,
545 sta->debugfs_dir,
546 (u64 *)&sta->driver_buffered_tids);
547
548 drv_sta_add_debugfs(local, sdata, &sta->sta, sta->debugfs_dir);
549}
550
551void ieee80211_sta_debugfs_remove(struct sta_info *sta)
552{
553 debugfs_remove_recursive(sta->debugfs_dir);
554 sta->debugfs_dir = NULL;
555}
556
