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Jiri Bence9f207f2007-05-05 11:46:38 -07001/*
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 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11#include <linux/debugfs.h>
12#include <linux/ieee80211.h>
13#include "ieee80211_i.h"
14#include "debugfs.h"
15#include "debugfs_sta.h"
16#include "sta_info.h"
17
18/* sta attributtes */
19
Eliad Peller07caf9d2010-10-27 14:58:29 +020020#define STA_READ(name, field, format_string) \
Jiri Bence9f207f2007-05-05 11:46:38 -070021static ssize_t sta_ ##name## _read(struct file *file, \
22 char __user *userbuf, \
23 size_t count, loff_t *ppos) \
24{ \
Jiri Bence9f207f2007-05-05 11:46:38 -070025 struct sta_info *sta = file->private_data; \
Eliad Peller07caf9d2010-10-27 14:58:29 +020026 return mac80211_format_buffer(userbuf, count, ppos, \
27 format_string, sta->field); \
Jiri Bence9f207f2007-05-05 11:46:38 -070028}
Eliad Peller07caf9d2010-10-27 14:58:29 +020029#define STA_READ_D(name, field) STA_READ(name, field, "%d\n")
30#define STA_READ_U(name, field) STA_READ(name, field, "%u\n")
31#define STA_READ_S(name, field) STA_READ(name, field, "%s\n")
Jiri Bence9f207f2007-05-05 11:46:38 -070032
Jiri Bence9f207f2007-05-05 11:46:38 -070033#define STA_OPS(name) \
34static const struct file_operations sta_ ##name## _ops = { \
35 .read = sta_##name##_read, \
36 .open = mac80211_open_file_generic, \
Arnd Bergmann2b18ab362010-07-06 19:05:31 +020037 .llseek = generic_file_llseek, \
Jiri Bence9f207f2007-05-05 11:46:38 -070038}
39
Johannes Berga75b4362010-05-01 18:53:51 +020040#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 = mac80211_open_file_generic, \
Arnd Bergmann2b18ab362010-07-06 19:05:31 +020045 .llseek = generic_file_llseek, \
Johannes Berga75b4362010-05-01 18:53:51 +020046}
47
Jiri Bence9f207f2007-05-05 11:46:38 -070048#define STA_FILE(name, field, format) \
49 STA_READ_##format(name, field) \
50 STA_OPS(name)
51
Johannes Berg17741cd2008-09-11 00:02:02 +020052STA_FILE(aid, sta.aid, D);
Johannes Berg47846c92009-11-25 17:46:19 +010053STA_FILE(dev, sdata->name, S);
Jiri Bence9f207f2007-05-05 11:46:38 -070054STA_FILE(last_signal, last_signal, D);
Jiri Bence9f207f2007-05-05 11:46:38 -070055
56static ssize_t sta_flags_read(struct file *file, char __user *userbuf,
57 size_t count, loff_t *ppos)
58{
59 char buf[100];
60 struct sta_info *sta = file->private_data;
Johannes Berg07346f812008-05-03 01:02:02 +020061 u32 staflags = get_sta_flags(sta);
Johannes Bergaf818582009-11-06 11:35:50 +010062 int res = scnprintf(buf, sizeof(buf), "%s%s%s%s%s%s%s%s%s",
Johannes Berg07346f812008-05-03 01:02:02 +020063 staflags & WLAN_STA_AUTH ? "AUTH\n" : "",
64 staflags & WLAN_STA_ASSOC ? "ASSOC\n" : "",
Johannes Bergaf818582009-11-06 11:35:50 +010065 staflags & WLAN_STA_PS_STA ? "PS (sta)\n" : "",
66 staflags & WLAN_STA_PS_DRIVER ? "PS (driver)\n" : "",
Johannes Berg07346f812008-05-03 01:02:02 +020067 staflags & WLAN_STA_AUTHORIZED ? "AUTHORIZED\n" : "",
68 staflags & WLAN_STA_SHORT_PREAMBLE ? "SHORT PREAMBLE\n" : "",
69 staflags & WLAN_STA_WME ? "WME\n" : "",
Jouni Malinen5394af42009-01-08 13:31:59 +020070 staflags & WLAN_STA_WDS ? "WDS\n" : "",
71 staflags & WLAN_STA_MFP ? "MFP\n" : "");
Jiri Bence9f207f2007-05-05 11:46:38 -070072 return simple_read_from_buffer(userbuf, count, ppos, buf, res);
73}
74STA_OPS(flags);
75
76static ssize_t sta_num_ps_buf_frames_read(struct file *file,
77 char __user *userbuf,
78 size_t count, loff_t *ppos)
79{
Jiri Bence9f207f2007-05-05 11:46:38 -070080 struct sta_info *sta = file->private_data;
Eliad Peller07caf9d2010-10-27 14:58:29 +020081 return mac80211_format_buffer(userbuf, count, ppos, "%u\n",
82 skb_queue_len(&sta->ps_tx_buf));
Jiri Bence9f207f2007-05-05 11:46:38 -070083}
84STA_OPS(num_ps_buf_frames);
85
Jiri Bence9f207f2007-05-05 11:46:38 -070086static ssize_t sta_inactive_ms_read(struct file *file, char __user *userbuf,
87 size_t count, loff_t *ppos)
88{
Jiri Bence9f207f2007-05-05 11:46:38 -070089 struct sta_info *sta = file->private_data;
Eliad Peller07caf9d2010-10-27 14:58:29 +020090 return mac80211_format_buffer(userbuf, count, ppos, "%d\n",
91 jiffies_to_msecs(jiffies - sta->last_rx));
Jiri Bence9f207f2007-05-05 11:46:38 -070092}
93STA_OPS(inactive_ms);
94
95static ssize_t sta_last_seq_ctrl_read(struct file *file, char __user *userbuf,
96 size_t count, loff_t *ppos)
97{
98 char buf[15*NUM_RX_DATA_QUEUES], *p = buf;
99 int i;
100 struct sta_info *sta = file->private_data;
101 for (i = 0; i < NUM_RX_DATA_QUEUES; i++)
102 p += scnprintf(p, sizeof(buf)+buf-p, "%x ",
Zhu Yiba9b07d2007-07-27 15:43:23 +0200103 le16_to_cpu(sta->last_seq_ctrl[i]));
Jiri Bence9f207f2007-05-05 11:46:38 -0700104 p += scnprintf(p, sizeof(buf)+buf-p, "\n");
105 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
106}
107STA_OPS(last_seq_ctrl);
108
Ron Rindjunskyeb2ba622008-01-28 14:07:20 +0200109static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf,
110 size_t count, loff_t *ppos)
111{
Johannes Berg098a6072010-04-06 11:18:47 +0200112 char buf[71 + STA_TID_NUM * 40], *p = buf;
Ron Rindjunskyeb2ba622008-01-28 14:07:20 +0200113 int i;
114 struct sta_info *sta = file->private_data;
Johannes Bergdd318572010-11-29 11:09:16 +0100115 struct tid_ampdu_rx *tid_rx;
116 struct tid_ampdu_tx *tid_tx;
Ron Rindjunskyeb2ba622008-01-28 14:07:20 +0200117
Johannes Bergdd318572010-11-29 11:09:16 +0100118 rcu_read_lock();
119
Pavel Roskine0b20f12010-01-30 19:55:27 -0500120 p += scnprintf(p, sizeof(buf) + buf - p, "next dialog_token: %#02x\n",
Johannes Berg386aa232009-06-17 17:28:45 +0200121 sta->ampdu_mlme.dialog_token_allocator + 1);
Pavel Roskine0b20f12010-01-30 19:55:27 -0500122 p += scnprintf(p, sizeof(buf) + buf - p,
Johannes Berg0ab33702010-06-10 10:21:42 +0200123 "TID\t\tRX active\tDTKN\tSSN\t\tTX\tDTKN\tpending\n");
Ron Rindjunskyeb2ba622008-01-28 14:07:20 +0200124
Johannes Bergdd318572010-11-29 11:09:16 +0100125 for (i = 0; i < STA_TID_NUM; i++) {
126 tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[i]);
127 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[i]);
128
129 p += scnprintf(p, sizeof(buf) + buf - p, "%02d", i);
130 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_rx);
Pavel Roskine0b20f12010-01-30 19:55:27 -0500131 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
Johannes Bergdd318572010-11-29 11:09:16 +0100132 tid_rx ? tid_rx->dialog_token : 0);
133 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x",
134 tid_rx ? tid_rx->ssn : 0);
135
136 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_tx);
137 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
138 tid_tx ? tid_tx->dialog_token : 0);
Pavel Roskine0b20f12010-01-30 19:55:27 -0500139 p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d",
Johannes Bergdd318572010-11-29 11:09:16 +0100140 tid_tx ? skb_queue_len(&tid_tx->pending) : 0);
Pavel Roskine0b20f12010-01-30 19:55:27 -0500141 p += scnprintf(p, sizeof(buf) + buf - p, "\n");
Johannes Berg386aa232009-06-17 17:28:45 +0200142 }
Johannes Bergdd318572010-11-29 11:09:16 +0100143 rcu_read_unlock();
Ron Rindjunskyeb2ba622008-01-28 14:07:20 +0200144
145 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
146}
Johannes Berga75b4362010-05-01 18:53:51 +0200147
148static ssize_t sta_agg_status_write(struct file *file, const char __user *userbuf,
149 size_t count, loff_t *ppos)
150{
151 char _buf[12], *buf = _buf;
152 struct sta_info *sta = file->private_data;
153 bool start, tx;
154 unsigned long tid;
155 int ret;
156
157 if (count > sizeof(_buf))
158 return -EINVAL;
159
160 if (copy_from_user(buf, userbuf, count))
161 return -EFAULT;
162
163 buf[sizeof(_buf) - 1] = '\0';
164
165 if (strncmp(buf, "tx ", 3) == 0) {
166 buf += 3;
167 tx = true;
168 } else if (strncmp(buf, "rx ", 3) == 0) {
169 buf += 3;
170 tx = false;
171 } else
172 return -EINVAL;
173
174 if (strncmp(buf, "start ", 6) == 0) {
175 buf += 6;
176 start = true;
177 if (!tx)
178 return -EINVAL;
179 } else if (strncmp(buf, "stop ", 5) == 0) {
180 buf += 5;
181 start = false;
182 } else
183 return -EINVAL;
184
185 tid = simple_strtoul(buf, NULL, 0);
186
187 if (tid >= STA_TID_NUM)
188 return -EINVAL;
189
190 if (tx) {
191 if (start)
Sujith Manoharanbd2ce6e2010-12-15 07:47:10 +0530192 ret = ieee80211_start_tx_ba_session(&sta->sta, tid, 5000);
Johannes Berga75b4362010-05-01 18:53:51 +0200193 else
Johannes Berg6a8579d2010-05-27 14:41:07 +0200194 ret = ieee80211_stop_tx_ba_session(&sta->sta, tid);
Johannes Berga75b4362010-05-01 18:53:51 +0200195 } else {
Johannes Berg53f73c02010-10-05 19:37:40 +0200196 __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT,
197 3, true);
Johannes Berga75b4362010-05-01 18:53:51 +0200198 ret = 0;
199 }
200
201 return ret ?: count;
202}
203STA_OPS_RW(agg_status);
Ron Rindjunskyeb2ba622008-01-28 14:07:20 +0200204
Johannes Berg64491f02009-11-19 14:26:11 +0100205static ssize_t sta_ht_capa_read(struct file *file, char __user *userbuf,
206 size_t count, loff_t *ppos)
207{
Luis R. Rodriguez7db94e22009-12-07 14:54:45 -0500208#define PRINT_HT_CAP(_cond, _str) \
209 do { \
210 if (_cond) \
211 p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \
212 } while (0)
Pavel Roskin4c82bf82010-01-30 19:55:09 -0500213 char buf[512], *p = buf;
Johannes Berg64491f02009-11-19 14:26:11 +0100214 int i;
215 struct sta_info *sta = file->private_data;
216 struct ieee80211_sta_ht_cap *htc = &sta->sta.ht_cap;
217
218 p += scnprintf(p, sizeof(buf) + buf - p, "ht %ssupported\n",
219 htc->ht_supported ? "" : "not ");
220 if (htc->ht_supported) {
Luis R. Rodriguezcb136f52009-12-07 14:01:28 -0500221 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.4x\n", htc->cap);
Luis R. Rodriguez7db94e22009-12-07 14:54:45 -0500222
Luis R. Rodriguezc15cf5f2010-04-08 16:08:46 -0400223 PRINT_HT_CAP((htc->cap & BIT(0)), "RX LDPC");
Luis R. Rodriguez7db94e22009-12-07 14:54:45 -0500224 PRINT_HT_CAP((htc->cap & BIT(1)), "HT20/HT40");
225 PRINT_HT_CAP(!(htc->cap & BIT(1)), "HT20");
226
227 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 0, "Static SM Power Save");
228 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 1, "Dynamic SM Power Save");
229 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 3, "SM Power Save disabled");
230
231 PRINT_HT_CAP((htc->cap & BIT(4)), "RX Greenfield");
232 PRINT_HT_CAP((htc->cap & BIT(5)), "RX HT20 SGI");
233 PRINT_HT_CAP((htc->cap & BIT(6)), "RX HT40 SGI");
234 PRINT_HT_CAP((htc->cap & BIT(7)), "TX STBC");
235
236 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 0, "No RX STBC");
237 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 1, "RX STBC 1-stream");
238 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 2, "RX STBC 2-streams");
239 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 3, "RX STBC 3-streams");
240
241 PRINT_HT_CAP((htc->cap & BIT(10)), "HT Delayed Block Ack");
242
243 PRINT_HT_CAP((htc->cap & BIT(11)), "Max AMSDU length: "
244 "3839 bytes");
245 PRINT_HT_CAP(!(htc->cap & BIT(11)), "Max AMSDU length: "
246 "7935 bytes");
247
248 /*
249 * For beacons and probe response this would mean the BSS
250 * does or does not allow the usage of DSSS/CCK HT40.
251 * Otherwise it means the STA does or does not use
252 * DSSS/CCK HT40.
253 */
254 PRINT_HT_CAP((htc->cap & BIT(12)), "DSSS/CCK HT40");
255 PRINT_HT_CAP(!(htc->cap & BIT(12)), "No DSSS/CCK HT40");
256
257 /* BIT(13) is reserved */
258
259 PRINT_HT_CAP((htc->cap & BIT(14)), "40 MHz Intolerant");
260
261 PRINT_HT_CAP((htc->cap & BIT(15)), "L-SIG TXOP protection");
262
Johannes Berg64491f02009-11-19 14:26:11 +0100263 p += scnprintf(p, sizeof(buf)+buf-p, "ampdu factor/density: %d/%d\n",
264 htc->ampdu_factor, htc->ampdu_density);
265 p += scnprintf(p, sizeof(buf)+buf-p, "MCS mask:");
Luis R. Rodriguez9da3e062009-12-07 15:57:50 -0500266
Johannes Berg64491f02009-11-19 14:26:11 +0100267 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
268 p += scnprintf(p, sizeof(buf)+buf-p, " %.2x",
269 htc->mcs.rx_mask[i]);
Luis R. Rodriguez9da3e062009-12-07 15:57:50 -0500270 p += scnprintf(p, sizeof(buf)+buf-p, "\n");
271
272 /* If not set this is meaningless */
273 if (le16_to_cpu(htc->mcs.rx_highest)) {
274 p += scnprintf(p, sizeof(buf)+buf-p,
275 "MCS rx highest: %d Mbps\n",
276 le16_to_cpu(htc->mcs.rx_highest));
277 }
278
Johannes Berg64491f02009-11-19 14:26:11 +0100279 p += scnprintf(p, sizeof(buf)+buf-p, "MCS tx params: %x\n",
280 htc->mcs.tx_params);
281 }
282
283 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
284}
285STA_OPS(ht_capa);
286
Jiri Bence9f207f2007-05-05 11:46:38 -0700287#define DEBUGFS_ADD(name) \
Johannes Berg7bcfaf22009-10-27 12:59:03 +0100288 debugfs_create_file(#name, 0400, \
Jiri Bence9f207f2007-05-05 11:46:38 -0700289 sta->debugfs.dir, sta, &sta_ ##name## _ops);
290
Felix Fietkau2826bcd2010-06-02 02:57:34 +0200291#define DEBUGFS_ADD_COUNTER(name, field) \
292 if (sizeof(sta->field) == sizeof(u32)) \
293 debugfs_create_u32(#name, 0400, sta->debugfs.dir, \
294 (u32 *) &sta->field); \
295 else \
296 debugfs_create_u64(#name, 0400, sta->debugfs.dir, \
297 (u64 *) &sta->field);
Jiri Bence9f207f2007-05-05 11:46:38 -0700298
299void ieee80211_sta_debugfs_add(struct sta_info *sta)
300{
Ben Greear295bafb2010-09-22 20:29:01 -0700301 struct dentry *stations_dir = sta->sdata->debugfs.subdir_stations;
Johannes Berg0c68ae262008-10-27 15:56:10 -0700302 u8 mac[3*ETH_ALEN];
Jiri Bence9f207f2007-05-05 11:46:38 -0700303
Johannes Berg63044e92008-10-07 12:04:29 +0200304 sta->debugfs.add_has_run = true;
305
Jiri Bence9f207f2007-05-05 11:46:38 -0700306 if (!stations_dir)
307 return;
308
Johannes Berg0c68ae262008-10-27 15:56:10 -0700309 snprintf(mac, sizeof(mac), "%pM", sta->sta.addr);
Jiri Bence9f207f2007-05-05 11:46:38 -0700310
Johannes Berg63044e92008-10-07 12:04:29 +0200311 /*
312 * This might fail due to a race condition:
313 * When mac80211 unlinks a station, the debugfs entries
314 * remain, but it is already possible to link a new
315 * station with the same address which triggers adding
316 * it to debugfs; therefore, if the old station isn't
317 * destroyed quickly enough the old station's debugfs
318 * dir might still be around.
319 */
Joe Perches0795af52007-10-03 17:59:30 -0700320 sta->debugfs.dir = debugfs_create_dir(mac, stations_dir);
Jiri Bence9f207f2007-05-05 11:46:38 -0700321 if (!sta->debugfs.dir)
322 return;
323
324 DEBUGFS_ADD(flags);
325 DEBUGFS_ADD(num_ps_buf_frames);
Jiri Bence9f207f2007-05-05 11:46:38 -0700326 DEBUGFS_ADD(inactive_ms);
327 DEBUGFS_ADD(last_seq_ctrl);
Ron Rindjunskyeb2ba622008-01-28 14:07:20 +0200328 DEBUGFS_ADD(agg_status);
Johannes Berg386aa232009-06-17 17:28:45 +0200329 DEBUGFS_ADD(dev);
Johannes Berg386aa232009-06-17 17:28:45 +0200330 DEBUGFS_ADD(last_signal);
Johannes Berg64491f02009-11-19 14:26:11 +0100331 DEBUGFS_ADD(ht_capa);
Felix Fietkau2826bcd2010-06-02 02:57:34 +0200332
333 DEBUGFS_ADD_COUNTER(rx_packets, rx_packets);
334 DEBUGFS_ADD_COUNTER(tx_packets, tx_packets);
335 DEBUGFS_ADD_COUNTER(rx_bytes, rx_bytes);
336 DEBUGFS_ADD_COUNTER(tx_bytes, tx_bytes);
337 DEBUGFS_ADD_COUNTER(rx_duplicates, num_duplicates);
338 DEBUGFS_ADD_COUNTER(rx_fragments, rx_fragments);
339 DEBUGFS_ADD_COUNTER(rx_dropped, rx_dropped);
340 DEBUGFS_ADD_COUNTER(tx_fragments, tx_fragments);
341 DEBUGFS_ADD_COUNTER(tx_filtered, tx_filtered_count);
342 DEBUGFS_ADD_COUNTER(tx_retry_failed, tx_retry_failed);
343 DEBUGFS_ADD_COUNTER(tx_retry_count, tx_retry_count);
344 DEBUGFS_ADD_COUNTER(wep_weak_iv_count, wep_weak_iv_count);
Jiri Bence9f207f2007-05-05 11:46:38 -0700345}
346
347void ieee80211_sta_debugfs_remove(struct sta_info *sta)
348{
Johannes Berg7bcfaf22009-10-27 12:59:03 +0100349 debugfs_remove_recursive(sta->debugfs.dir);
Jiri Bence9f207f2007-05-05 11:46:38 -0700350 sta->debugfs.dir = NULL;
351}