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mac80211: mesh: flush mesh paths unconditionally
[deliverable/linux.git] / net / mac80211 / debugfs_sta.c
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) \
24 static 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) \
35 static 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) \
42 static 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
53 STA_FILE(aid, sta.aid, D);
54
55 static 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
86 static 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 }
104 STA_OPS(flags);
105
106 static 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 }
120 STA_OPS(num_ps_buf_frames);
121
122 static 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 }
134 STA_OPS(last_seq_ctrl);
135
136 static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf,
137 size_t count, loff_t *ppos)
138 {
139 char buf[71 + IEEE80211_NUM_TIDS * 40], *p = buf;
140 int i;
141 struct sta_info *sta = file->private_data;
142 struct tid_ampdu_rx *tid_rx;
143 struct tid_ampdu_tx *tid_tx;
144
145 rcu_read_lock();
146
147 p += scnprintf(p, sizeof(buf) + buf - p, "next dialog_token: %#02x\n",
148 sta->ampdu_mlme.dialog_token_allocator + 1);
149 p += scnprintf(p, sizeof(buf) + buf - p,
150 "TID\t\tRX\tDTKN\tSSN\t\tTX\tDTKN\tpending\n");
151
152 for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
153 tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[i]);
154 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[i]);
155
156 p += scnprintf(p, sizeof(buf) + buf - p, "%02d", i);
157 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_rx);
158 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
159 tid_rx ? tid_rx->dialog_token : 0);
160 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x",
161 tid_rx ? tid_rx->ssn : 0);
162
163 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_tx);
164 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
165 tid_tx ? tid_tx->dialog_token : 0);
166 p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d",
167 tid_tx ? skb_queue_len(&tid_tx->pending) : 0);
168 p += scnprintf(p, sizeof(buf) + buf - p, "\n");
169 }
170 rcu_read_unlock();
171
172 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
173 }
174
175 static ssize_t sta_agg_status_write(struct file *file, const char __user *userbuf,
176 size_t count, loff_t *ppos)
177 {
178 char _buf[25] = {}, *buf = _buf;
179 struct sta_info *sta = file->private_data;
180 bool start, tx;
181 unsigned long tid;
182 char *pos;
183 int ret, timeout = 5000;
184
185 if (count > sizeof(_buf))
186 return -EINVAL;
187
188 if (copy_from_user(buf, userbuf, count))
189 return -EFAULT;
190
191 buf[sizeof(_buf) - 1] = '\0';
192 pos = buf;
193 buf = strsep(&pos, " ");
194 if (!buf)
195 return -EINVAL;
196
197 if (!strcmp(buf, "tx"))
198 tx = true;
199 else if (!strcmp(buf, "rx"))
200 tx = false;
201 else
202 return -EINVAL;
203
204 buf = strsep(&pos, " ");
205 if (!buf)
206 return -EINVAL;
207 if (!strcmp(buf, "start")) {
208 start = true;
209 if (!tx)
210 return -EINVAL;
211 } else if (!strcmp(buf, "stop")) {
212 start = false;
213 } else {
214 return -EINVAL;
215 }
216
217 buf = strsep(&pos, " ");
218 if (!buf)
219 return -EINVAL;
220 if (sscanf(buf, "timeout=%d", &timeout) == 1) {
221 buf = strsep(&pos, " ");
222 if (!buf || !tx || !start)
223 return -EINVAL;
224 }
225
226 ret = kstrtoul(buf, 0, &tid);
227 if (ret || tid >= IEEE80211_NUM_TIDS)
228 return -EINVAL;
229
230 if (tx) {
231 if (start)
232 ret = ieee80211_start_tx_ba_session(&sta->sta, tid,
233 timeout);
234 else
235 ret = ieee80211_stop_tx_ba_session(&sta->sta, tid);
236 } else {
237 __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT,
238 3, true);
239 ret = 0;
240 }
241
242 return ret ?: count;
243 }
244 STA_OPS_RW(agg_status);
245
246 static ssize_t sta_ht_capa_read(struct file *file, char __user *userbuf,
247 size_t count, loff_t *ppos)
248 {
249 #define PRINT_HT_CAP(_cond, _str) \
250 do { \
251 if (_cond) \
252 p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \
253 } while (0)
254 char buf[512], *p = buf;
255 int i;
256 struct sta_info *sta = file->private_data;
257 struct ieee80211_sta_ht_cap *htc = &sta->sta.ht_cap;
258
259 p += scnprintf(p, sizeof(buf) + buf - p, "ht %ssupported\n",
260 htc->ht_supported ? "" : "not ");
261 if (htc->ht_supported) {
262 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.4x\n", htc->cap);
263
264 PRINT_HT_CAP((htc->cap & BIT(0)), "RX LDPC");
265 PRINT_HT_CAP((htc->cap & BIT(1)), "HT20/HT40");
266 PRINT_HT_CAP(!(htc->cap & BIT(1)), "HT20");
267
268 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 0, "Static SM Power Save");
269 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 1, "Dynamic SM Power Save");
270 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 3, "SM Power Save disabled");
271
272 PRINT_HT_CAP((htc->cap & BIT(4)), "RX Greenfield");
273 PRINT_HT_CAP((htc->cap & BIT(5)), "RX HT20 SGI");
274 PRINT_HT_CAP((htc->cap & BIT(6)), "RX HT40 SGI");
275 PRINT_HT_CAP((htc->cap & BIT(7)), "TX STBC");
276
277 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 0, "No RX STBC");
278 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 1, "RX STBC 1-stream");
279 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 2, "RX STBC 2-streams");
280 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 3, "RX STBC 3-streams");
281
282 PRINT_HT_CAP((htc->cap & BIT(10)), "HT Delayed Block Ack");
283
284 PRINT_HT_CAP(!(htc->cap & BIT(11)), "Max AMSDU length: "
285 "3839 bytes");
286 PRINT_HT_CAP((htc->cap & BIT(11)), "Max AMSDU length: "
287 "7935 bytes");
288
289 /*
290 * For beacons and probe response this would mean the BSS
291 * does or does not allow the usage of DSSS/CCK HT40.
292 * Otherwise it means the STA does or does not use
293 * DSSS/CCK HT40.
294 */
295 PRINT_HT_CAP((htc->cap & BIT(12)), "DSSS/CCK HT40");
296 PRINT_HT_CAP(!(htc->cap & BIT(12)), "No DSSS/CCK HT40");
297
298 /* BIT(13) is reserved */
299
300 PRINT_HT_CAP((htc->cap & BIT(14)), "40 MHz Intolerant");
301
302 PRINT_HT_CAP((htc->cap & BIT(15)), "L-SIG TXOP protection");
303
304 p += scnprintf(p, sizeof(buf)+buf-p, "ampdu factor/density: %d/%d\n",
305 htc->ampdu_factor, htc->ampdu_density);
306 p += scnprintf(p, sizeof(buf)+buf-p, "MCS mask:");
307
308 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
309 p += scnprintf(p, sizeof(buf)+buf-p, " %.2x",
310 htc->mcs.rx_mask[i]);
311 p += scnprintf(p, sizeof(buf)+buf-p, "\n");
312
313 /* If not set this is meaningless */
314 if (le16_to_cpu(htc->mcs.rx_highest)) {
315 p += scnprintf(p, sizeof(buf)+buf-p,
316 "MCS rx highest: %d Mbps\n",
317 le16_to_cpu(htc->mcs.rx_highest));
318 }
319
320 p += scnprintf(p, sizeof(buf)+buf-p, "MCS tx params: %x\n",
321 htc->mcs.tx_params);
322 }
323
324 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
325 }
326 STA_OPS(ht_capa);
327
328 static ssize_t sta_vht_capa_read(struct file *file, char __user *userbuf,
329 size_t count, loff_t *ppos)
330 {
331 char buf[128], *p = buf;
332 struct sta_info *sta = file->private_data;
333 struct ieee80211_sta_vht_cap *vhtc = &sta->sta.vht_cap;
334
335 p += scnprintf(p, sizeof(buf) + buf - p, "VHT %ssupported\n",
336 vhtc->vht_supported ? "" : "not ");
337 if (vhtc->vht_supported) {
338 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.8x\n", vhtc->cap);
339
340 p += scnprintf(p, sizeof(buf)+buf-p, "RX MCS: %.4x\n",
341 le16_to_cpu(vhtc->vht_mcs.rx_mcs_map));
342 if (vhtc->vht_mcs.rx_highest)
343 p += scnprintf(p, sizeof(buf)+buf-p,
344 "MCS RX highest: %d Mbps\n",
345 le16_to_cpu(vhtc->vht_mcs.rx_highest));
346 p += scnprintf(p, sizeof(buf)+buf-p, "TX MCS: %.4x\n",
347 le16_to_cpu(vhtc->vht_mcs.tx_mcs_map));
348 if (vhtc->vht_mcs.tx_highest)
349 p += scnprintf(p, sizeof(buf)+buf-p,
350 "MCS TX highest: %d Mbps\n",
351 le16_to_cpu(vhtc->vht_mcs.tx_highest));
352 }
353
354 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
355 }
356 STA_OPS(vht_capa);
357
358
359 #define DEBUGFS_ADD(name) \
360 debugfs_create_file(#name, 0400, \
361 sta->debugfs_dir, sta, &sta_ ##name## _ops);
362
363 #define DEBUGFS_ADD_COUNTER(name, field) \
364 if (sizeof(sta->field) == sizeof(u32)) \
365 debugfs_create_u32(#name, 0400, sta->debugfs_dir, \
366 (u32 *) &sta->field); \
367 else \
368 debugfs_create_u64(#name, 0400, sta->debugfs_dir, \
369 (u64 *) &sta->field);
370
371 void ieee80211_sta_debugfs_add(struct sta_info *sta)
372 {
373 struct ieee80211_local *local = sta->local;
374 struct ieee80211_sub_if_data *sdata = sta->sdata;
375 struct dentry *stations_dir = sta->sdata->debugfs.subdir_stations;
376 u8 mac[3*ETH_ALEN];
377
378 if (!stations_dir)
379 return;
380
381 snprintf(mac, sizeof(mac), "%pM", sta->sta.addr);
382
383 /*
384 * This might fail due to a race condition:
385 * When mac80211 unlinks a station, the debugfs entries
386 * remain, but it is already possible to link a new
387 * station with the same address which triggers adding
388 * it to debugfs; therefore, if the old station isn't
389 * destroyed quickly enough the old station's debugfs
390 * dir might still be around.
391 */
392 sta->debugfs_dir = debugfs_create_dir(mac, stations_dir);
393 if (!sta->debugfs_dir)
394 return;
395
396 DEBUGFS_ADD(flags);
397 DEBUGFS_ADD(num_ps_buf_frames);
398 DEBUGFS_ADD(last_seq_ctrl);
399 DEBUGFS_ADD(agg_status);
400 DEBUGFS_ADD(ht_capa);
401 DEBUGFS_ADD(vht_capa);
402
403 DEBUGFS_ADD_COUNTER(rx_duplicates, rx_stats.num_duplicates);
404 DEBUGFS_ADD_COUNTER(rx_fragments, rx_stats.fragments);
405 DEBUGFS_ADD_COUNTER(tx_filtered, status_stats.filtered);
406
407 if (sizeof(sta->driver_buffered_tids) == sizeof(u32))
408 debugfs_create_x32("driver_buffered_tids", 0400,
409 sta->debugfs_dir,
410 (u32 *)&sta->driver_buffered_tids);
411 else
412 debugfs_create_x64("driver_buffered_tids", 0400,
413 sta->debugfs_dir,
414 (u64 *)&sta->driver_buffered_tids);
415
416 drv_sta_add_debugfs(local, sdata, &sta->sta, sta->debugfs_dir);
417 }
418
419 void ieee80211_sta_debugfs_remove(struct sta_info *sta)
420 {
421 struct ieee80211_local *local = sta->local;
422 struct ieee80211_sub_if_data *sdata = sta->sdata;
423
424 drv_sta_remove_debugfs(local, sdata, &sta->sta, sta->debugfs_dir);
425 debugfs_remove_recursive(sta->debugfs_dir);
426 sta->debugfs_dir = NULL;
427 }
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