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Linux 4.1.16
[linux/fpc-iii.git] / net / mac80211 / debugfs_sta.c
blob252859e90e8a5085f18916edda7a3bf407cdd000
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) \
23 static 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 #define STA_READ_U(name, field) STA_READ(name, field, "%u\n")
33 #define STA_READ_S(name, field) STA_READ(name, field, "%s\n")
34
35 #define STA_OPS(name) \
36 static const struct file_operations sta_ ##name## _ops = { \
37 .read = sta_##name##_read, \
38 .open = simple_open, \
39 .llseek = generic_file_llseek, \
40 }
41
42 #define STA_OPS_RW(name) \
43 static const struct file_operations sta_ ##name## _ops = { \
44 .read = sta_##name##_read, \
45 .write = sta_##name##_write, \
46 .open = simple_open, \
47 .llseek = generic_file_llseek, \
48 }
49
50 #define STA_FILE(name, field, format) \
51 STA_READ_##format(name, field) \
52 STA_OPS(name)
53
54 STA_FILE(aid, sta.aid, D);
55 STA_FILE(dev, sdata->name, S);
56 STA_FILE(last_signal, last_signal, D);
57 STA_FILE(last_ack_signal, last_ack_signal, D);
58 STA_FILE(beacon_loss_count, beacon_loss_count, D);
59
60 static ssize_t sta_flags_read(struct file *file, char __user *userbuf,
61 size_t count, loff_t *ppos)
62 {
63 char buf[121];
64 struct sta_info *sta = file->private_data;
65
66 #define TEST(flg) \
67 test_sta_flag(sta, WLAN_STA_##flg) ? #flg "\n" : ""
68
69 int res = scnprintf(buf, sizeof(buf),
70 "%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",
71 TEST(AUTH), TEST(ASSOC), TEST(PS_STA),
72 TEST(PS_DRIVER), TEST(AUTHORIZED),
73 TEST(SHORT_PREAMBLE),
74 sta->sta.wme ? "WME\n" : "",
75 TEST(WDS), TEST(CLEAR_PS_FILT),
76 TEST(MFP), TEST(BLOCK_BA), TEST(PSPOLL),
77 TEST(UAPSD), TEST(SP), TEST(TDLS_PEER),
78 TEST(TDLS_PEER_AUTH), TEST(TDLS_INITIATOR),
79 TEST(TDLS_CHAN_SWITCH), TEST(TDLS_OFF_CHANNEL),
80 TEST(4ADDR_EVENT), TEST(INSERTED),
81 TEST(RATE_CONTROL), TEST(TOFFSET_KNOWN),
82 TEST(MPSP_OWNER), TEST(MPSP_RECIPIENT));
83 #undef TEST
84 return simple_read_from_buffer(userbuf, count, ppos, buf, res);
85 }
86 STA_OPS(flags);
87
88 static ssize_t sta_num_ps_buf_frames_read(struct file *file,
89 char __user *userbuf,
90 size_t count, loff_t *ppos)
91 {
92 struct sta_info *sta = file->private_data;
93 char buf[17*IEEE80211_NUM_ACS], *p = buf;
94 int ac;
95
96 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
97 p += scnprintf(p, sizeof(buf)+buf-p, "AC%d: %d\n", ac,
98 skb_queue_len(&sta->ps_tx_buf[ac]) +
99 skb_queue_len(&sta->tx_filtered[ac]));
100 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
101 }
102 STA_OPS(num_ps_buf_frames);
103
104 static ssize_t sta_inactive_ms_read(struct file *file, char __user *userbuf,
105 size_t count, loff_t *ppos)
106 {
107 struct sta_info *sta = file->private_data;
108 return mac80211_format_buffer(userbuf, count, ppos, "%d\n",
109 jiffies_to_msecs(jiffies - sta->last_rx));
110 }
111 STA_OPS(inactive_ms);
112
113
114 static ssize_t sta_connected_time_read(struct file *file, char __user *userbuf,
115 size_t count, loff_t *ppos)
116 {
117 struct sta_info *sta = file->private_data;
118 struct timespec uptime;
119 struct tm result;
120 long connected_time_secs;
121 char buf[100];
122 int res;
123 ktime_get_ts(&uptime);
124 connected_time_secs = uptime.tv_sec - sta->last_connected;
125 time_to_tm(connected_time_secs, 0, &result);
126 result.tm_year -= 70;
127 result.tm_mday -= 1;
128 res = scnprintf(buf, sizeof(buf),
129 "years - %ld\nmonths - %d\ndays - %d\nclock - %d:%d:%d\n\n",
130 result.tm_year, result.tm_mon, result.tm_mday,
131 result.tm_hour, result.tm_min, result.tm_sec);
132 return simple_read_from_buffer(userbuf, count, ppos, buf, res);
133 }
134 STA_OPS(connected_time);
135
136
137
138 static ssize_t sta_last_seq_ctrl_read(struct file *file, char __user *userbuf,
139 size_t count, loff_t *ppos)
140 {
141 char buf[15*IEEE80211_NUM_TIDS], *p = buf;
142 int i;
143 struct sta_info *sta = file->private_data;
144 for (i = 0; i < IEEE80211_NUM_TIDS; i++)
145 p += scnprintf(p, sizeof(buf)+buf-p, "%x ",
146 le16_to_cpu(sta->last_seq_ctrl[i]));
147 p += scnprintf(p, sizeof(buf)+buf-p, "\n");
148 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
149 }
150 STA_OPS(last_seq_ctrl);
151
152 static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf,
153 size_t count, loff_t *ppos)
154 {
155 char buf[71 + IEEE80211_NUM_TIDS * 40], *p = buf;
156 int i;
157 struct sta_info *sta = file->private_data;
158 struct tid_ampdu_rx *tid_rx;
159 struct tid_ampdu_tx *tid_tx;
160
161 rcu_read_lock();
162
163 p += scnprintf(p, sizeof(buf) + buf - p, "next dialog_token: %#02x\n",
164 sta->ampdu_mlme.dialog_token_allocator + 1);
165 p += scnprintf(p, sizeof(buf) + buf - p,
166 "TID\t\tRX\tDTKN\tSSN\t\tTX\tDTKN\tpending\n");
167
168 for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
169 tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[i]);
170 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[i]);
171
172 p += scnprintf(p, sizeof(buf) + buf - p, "%02d", i);
173 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_rx);
174 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
175 tid_rx ? tid_rx->dialog_token : 0);
176 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x",
177 tid_rx ? tid_rx->ssn : 0);
178
179 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_tx);
180 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
181 tid_tx ? tid_tx->dialog_token : 0);
182 p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d",
183 tid_tx ? skb_queue_len(&tid_tx->pending) : 0);
184 p += scnprintf(p, sizeof(buf) + buf - p, "\n");
185 }
186 rcu_read_unlock();
187
188 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
189 }
190
191 static ssize_t sta_agg_status_write(struct file *file, const char __user *userbuf,
192 size_t count, loff_t *ppos)
193 {
194 char _buf[12] = {}, *buf = _buf;
195 struct sta_info *sta = file->private_data;
196 bool start, tx;
197 unsigned long tid;
198 int ret;
199
200 if (count > sizeof(_buf))
201 return -EINVAL;
202
203 if (copy_from_user(buf, userbuf, count))
204 return -EFAULT;
205
206 buf[sizeof(_buf) - 1] = '\0';
207
208 if (strncmp(buf, "tx ", 3) == 0) {
209 buf += 3;
210 tx = true;
211 } else if (strncmp(buf, "rx ", 3) == 0) {
212 buf += 3;
213 tx = false;
214 } else
215 return -EINVAL;
216
217 if (strncmp(buf, "start ", 6) == 0) {
218 buf += 6;
219 start = true;
220 if (!tx)
221 return -EINVAL;
222 } else if (strncmp(buf, "stop ", 5) == 0) {
223 buf += 5;
224 start = false;
225 } else
226 return -EINVAL;
227
228 ret = kstrtoul(buf, 0, &tid);
229 if (ret)
230 return ret;
231
232 if (tid >= IEEE80211_NUM_TIDS)
233 return -EINVAL;
234
235 if (tx) {
236 if (start)
237 ret = ieee80211_start_tx_ba_session(&sta->sta, tid, 5000);
238 else
239 ret = ieee80211_stop_tx_ba_session(&sta->sta, tid);
240 } else {
241 __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT,
242 3, true);
243 ret = 0;
244 }
245
246 return ret ?: count;
247 }
248 STA_OPS_RW(agg_status);
249
250 static ssize_t sta_ht_capa_read(struct file *file, char __user *userbuf,
251 size_t count, loff_t *ppos)
252 {
253 #define PRINT_HT_CAP(_cond, _str) \
254 do { \
255 if (_cond) \
256 p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \
257 } while (0)
258 char buf[512], *p = buf;
259 int i;
260 struct sta_info *sta = file->private_data;
261 struct ieee80211_sta_ht_cap *htc = &sta->sta.ht_cap;
262
263 p += scnprintf(p, sizeof(buf) + buf - p, "ht %ssupported\n",
264 htc->ht_supported ? "" : "not ");
265 if (htc->ht_supported) {
266 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.4x\n", htc->cap);
267
268 PRINT_HT_CAP((htc->cap & BIT(0)), "RX LDPC");
269 PRINT_HT_CAP((htc->cap & BIT(1)), "HT20/HT40");
270 PRINT_HT_CAP(!(htc->cap & BIT(1)), "HT20");
271
272 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 0, "Static SM Power Save");
273 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 1, "Dynamic SM Power Save");
274 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 3, "SM Power Save disabled");
275
276 PRINT_HT_CAP((htc->cap & BIT(4)), "RX Greenfield");
277 PRINT_HT_CAP((htc->cap & BIT(5)), "RX HT20 SGI");
278 PRINT_HT_CAP((htc->cap & BIT(6)), "RX HT40 SGI");
279 PRINT_HT_CAP((htc->cap & BIT(7)), "TX STBC");
280
281 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 0, "No RX STBC");
282 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 1, "RX STBC 1-stream");
283 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 2, "RX STBC 2-streams");
284 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 3, "RX STBC 3-streams");
285
286 PRINT_HT_CAP((htc->cap & BIT(10)), "HT Delayed Block Ack");
287
288 PRINT_HT_CAP(!(htc->cap & BIT(11)), "Max AMSDU length: "
289 "3839 bytes");
290 PRINT_HT_CAP((htc->cap & BIT(11)), "Max AMSDU length: "
291 "7935 bytes");
292
293 /*
294 * For beacons and probe response this would mean the BSS
295 * does or does not allow the usage of DSSS/CCK HT40.
296 * Otherwise it means the STA does or does not use
297 * DSSS/CCK HT40.
298 */
299 PRINT_HT_CAP((htc->cap & BIT(12)), "DSSS/CCK HT40");
300 PRINT_HT_CAP(!(htc->cap & BIT(12)), "No DSSS/CCK HT40");
301
302 /* BIT(13) is reserved */
303
304 PRINT_HT_CAP((htc->cap & BIT(14)), "40 MHz Intolerant");
305
306 PRINT_HT_CAP((htc->cap & BIT(15)), "L-SIG TXOP protection");
307
308 p += scnprintf(p, sizeof(buf)+buf-p, "ampdu factor/density: %d/%d\n",
309 htc->ampdu_factor, htc->ampdu_density);
310 p += scnprintf(p, sizeof(buf)+buf-p, "MCS mask:");
311
312 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
313 p += scnprintf(p, sizeof(buf)+buf-p, " %.2x",
314 htc->mcs.rx_mask[i]);
315 p += scnprintf(p, sizeof(buf)+buf-p, "\n");
316
317 /* If not set this is meaningless */
318 if (le16_to_cpu(htc->mcs.rx_highest)) {
319 p += scnprintf(p, sizeof(buf)+buf-p,
320 "MCS rx highest: %d Mbps\n",
321 le16_to_cpu(htc->mcs.rx_highest));
322 }
323
324 p += scnprintf(p, sizeof(buf)+buf-p, "MCS tx params: %x\n",
325 htc->mcs.tx_params);
326 }
327
328 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
329 }
330 STA_OPS(ht_capa);
331
332 static ssize_t sta_vht_capa_read(struct file *file, char __user *userbuf,
333 size_t count, loff_t *ppos)
334 {
335 char buf[128], *p = buf;
336 struct sta_info *sta = file->private_data;
337 struct ieee80211_sta_vht_cap *vhtc = &sta->sta.vht_cap;
338
339 p += scnprintf(p, sizeof(buf) + buf - p, "VHT %ssupported\n",
340 vhtc->vht_supported ? "" : "not ");
341 if (vhtc->vht_supported) {
342 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.8x\n", vhtc->cap);
343
344 p += scnprintf(p, sizeof(buf)+buf-p, "RX MCS: %.4x\n",
345 le16_to_cpu(vhtc->vht_mcs.rx_mcs_map));
346 if (vhtc->vht_mcs.rx_highest)
347 p += scnprintf(p, sizeof(buf)+buf-p,
348 "MCS RX highest: %d Mbps\n",
349 le16_to_cpu(vhtc->vht_mcs.rx_highest));
350 p += scnprintf(p, sizeof(buf)+buf-p, "TX MCS: %.4x\n",
351 le16_to_cpu(vhtc->vht_mcs.tx_mcs_map));
352 if (vhtc->vht_mcs.tx_highest)
353 p += scnprintf(p, sizeof(buf)+buf-p,
354 "MCS TX highest: %d Mbps\n",
355 le16_to_cpu(vhtc->vht_mcs.tx_highest));
356 }
357
358 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
359 }
360 STA_OPS(vht_capa);
361
362 static ssize_t sta_current_tx_rate_read(struct file *file, char __user *userbuf,
363 size_t count, loff_t *ppos)
364 {
365 struct sta_info *sta = file->private_data;
366 struct rate_info rinfo;
367 u16 rate;
368 sta_set_rate_info_tx(sta, &sta->last_tx_rate, &rinfo);
369 rate = cfg80211_calculate_bitrate(&rinfo);
370
371 return mac80211_format_buffer(userbuf, count, ppos,
372 "%d.%d MBit/s\n",
373 rate/10, rate%10);
374 }
375 STA_OPS(current_tx_rate);
376
377 static ssize_t sta_last_rx_rate_read(struct file *file, char __user *userbuf,
378 size_t count, loff_t *ppos)
379 {
380 struct sta_info *sta = file->private_data;
381 struct rate_info rinfo;
382 u16 rate;
383
384 sta_set_rate_info_rx(sta, &rinfo);
385
386 rate = cfg80211_calculate_bitrate(&rinfo);
387
388 return mac80211_format_buffer(userbuf, count, ppos,
389 "%d.%d MBit/s\n",
390 rate/10, rate%10);
391 }
392 STA_OPS(last_rx_rate);
393
394 #define DEBUGFS_ADD(name) \
395 debugfs_create_file(#name, 0400, \
396 sta->debugfs.dir, sta, &sta_ ##name## _ops);
397
398 #define DEBUGFS_ADD_COUNTER(name, field) \
399 if (sizeof(sta->field) == sizeof(u32)) \
400 debugfs_create_u32(#name, 0400, sta->debugfs.dir, \
401 (u32 *) &sta->field); \
402 else \
403 debugfs_create_u64(#name, 0400, sta->debugfs.dir, \
404 (u64 *) &sta->field);
405
406 void ieee80211_sta_debugfs_add(struct sta_info *sta)
407 {
408 struct ieee80211_local *local = sta->local;
409 struct ieee80211_sub_if_data *sdata = sta->sdata;
410 struct dentry *stations_dir = sta->sdata->debugfs.subdir_stations;
411 u8 mac[3*ETH_ALEN];
412
413 sta->debugfs.add_has_run = true;
414
415 if (!stations_dir)
416 return;
417
418 snprintf(mac, sizeof(mac), "%pM", sta->sta.addr);
419
420 /*
421 * This might fail due to a race condition:
422 * When mac80211 unlinks a station, the debugfs entries
423 * remain, but it is already possible to link a new
424 * station with the same address which triggers adding
425 * it to debugfs; therefore, if the old station isn't
426 * destroyed quickly enough the old station's debugfs
427 * dir might still be around.
428 */
429 sta->debugfs.dir = debugfs_create_dir(mac, stations_dir);
430 if (!sta->debugfs.dir)
431 return;
432
433 DEBUGFS_ADD(flags);
434 DEBUGFS_ADD(num_ps_buf_frames);
435 DEBUGFS_ADD(inactive_ms);
436 DEBUGFS_ADD(connected_time);
437 DEBUGFS_ADD(last_seq_ctrl);
438 DEBUGFS_ADD(agg_status);
439 DEBUGFS_ADD(dev);
440 DEBUGFS_ADD(last_signal);
441 DEBUGFS_ADD(beacon_loss_count);
442 DEBUGFS_ADD(ht_capa);
443 DEBUGFS_ADD(vht_capa);
444 DEBUGFS_ADD(last_ack_signal);
445 DEBUGFS_ADD(current_tx_rate);
446 DEBUGFS_ADD(last_rx_rate);
447
448 DEBUGFS_ADD_COUNTER(rx_packets, rx_packets);
449 DEBUGFS_ADD_COUNTER(tx_packets, tx_packets);
450 DEBUGFS_ADD_COUNTER(rx_bytes, rx_bytes);
451 DEBUGFS_ADD_COUNTER(tx_bytes, tx_bytes);
452 DEBUGFS_ADD_COUNTER(rx_duplicates, num_duplicates);
453 DEBUGFS_ADD_COUNTER(rx_fragments, rx_fragments);
454 DEBUGFS_ADD_COUNTER(rx_dropped, rx_dropped);
455 DEBUGFS_ADD_COUNTER(tx_fragments, tx_fragments);
456 DEBUGFS_ADD_COUNTER(tx_filtered, tx_filtered_count);
457 DEBUGFS_ADD_COUNTER(tx_retry_failed, tx_retry_failed);
458 DEBUGFS_ADD_COUNTER(tx_retry_count, tx_retry_count);
459
460 if (sizeof(sta->driver_buffered_tids) == sizeof(u32))
461 debugfs_create_x32("driver_buffered_tids", 0400,
462 sta->debugfs.dir,
463 (u32 *)&sta->driver_buffered_tids);
464 else
465 debugfs_create_x64("driver_buffered_tids", 0400,
466 sta->debugfs.dir,
467 (u64 *)&sta->driver_buffered_tids);
468
469 drv_sta_add_debugfs(local, sdata, &sta->sta, sta->debugfs.dir);
470 }
471
472 void ieee80211_sta_debugfs_remove(struct sta_info *sta)
473 {
474 struct ieee80211_local *local = sta->local;
475 struct ieee80211_sub_if_data *sdata = sta->sdata;
476
477 drv_sta_remove_debugfs(local, sdata, &sta->sta, sta->debugfs.dir);
478 debugfs_remove_recursive(sta->debugfs.dir);
479 sta->debugfs.dir = NULL;
480 }
Linux with added FPC-III support