2 * Copyright 2003-2005 Devicescape Software, Inc.
3 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
4 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
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.
11 #include <linux/debugfs.h>
12 #include <linux/ieee80211.h>
13 #include "ieee80211_i.h"
15 #include "debugfs_sta.h"
20 #define STA_READ(name, buflen, field, format_string) \
21 static ssize_t sta_ ##name## _read(struct file *file, \
22 char __user *userbuf, \
23 size_t count, loff_t *ppos) \
26 struct sta_info *sta = file->private_data; \
28 res = scnprintf(buf, buflen, format_string, sta->field); \
29 return simple_read_from_buffer(userbuf, count, ppos, buf, res); \
31 #define STA_READ_D(name, field) STA_READ(name, 20, field, "%d\n")
32 #define STA_READ_U(name, field) STA_READ(name, 20, field, "%u\n")
33 #define STA_READ_S(name, field) STA_READ(name, 20, field, "%s\n")
35 #define STA_OPS(name) \
36 static const struct file_operations sta_ ##name## _ops = { \
37 .read = sta_##name##_read, \
38 .open = mac80211_open_file_generic, \
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 = mac80211_open_file_generic, \
48 #define STA_FILE(name, field, format) \
49 STA_READ_##format(name, field) \
52 STA_FILE(aid
, sta
.aid
, D
);
53 STA_FILE(dev
, sdata
->name
, S
);
54 STA_FILE(last_signal
, last_signal
, D
);
56 static ssize_t
sta_flags_read(struct file
*file
, char __user
*userbuf
,
57 size_t count
, loff_t
*ppos
)
60 struct sta_info
*sta
= file
->private_data
;
61 u32 staflags
= get_sta_flags(sta
);
62 int res
= scnprintf(buf
, sizeof(buf
), "%s%s%s%s%s%s%s%s%s",
63 staflags
& WLAN_STA_AUTH
? "AUTH\n" : "",
64 staflags
& WLAN_STA_ASSOC
? "ASSOC\n" : "",
65 staflags
& WLAN_STA_PS_STA
? "PS (sta)\n" : "",
66 staflags
& WLAN_STA_PS_DRIVER
? "PS (driver)\n" : "",
67 staflags
& WLAN_STA_AUTHORIZED
? "AUTHORIZED\n" : "",
68 staflags
& WLAN_STA_SHORT_PREAMBLE
? "SHORT PREAMBLE\n" : "",
69 staflags
& WLAN_STA_WME
? "WME\n" : "",
70 staflags
& WLAN_STA_WDS
? "WDS\n" : "",
71 staflags
& WLAN_STA_MFP
? "MFP\n" : "");
72 return simple_read_from_buffer(userbuf
, count
, ppos
, buf
, res
);
76 static ssize_t
sta_num_ps_buf_frames_read(struct file
*file
,
78 size_t count
, loff_t
*ppos
)
81 struct sta_info
*sta
= file
->private_data
;
82 int res
= scnprintf(buf
, sizeof(buf
), "%u\n",
83 skb_queue_len(&sta
->ps_tx_buf
));
84 return simple_read_from_buffer(userbuf
, count
, ppos
, buf
, res
);
86 STA_OPS(num_ps_buf_frames
);
88 static ssize_t
sta_inactive_ms_read(struct file
*file
, char __user
*userbuf
,
89 size_t count
, loff_t
*ppos
)
92 struct sta_info
*sta
= file
->private_data
;
93 int res
= scnprintf(buf
, sizeof(buf
), "%d\n",
94 jiffies_to_msecs(jiffies
- sta
->last_rx
));
95 return simple_read_from_buffer(userbuf
, count
, ppos
, buf
, res
);
99 static ssize_t
sta_last_seq_ctrl_read(struct file
*file
, char __user
*userbuf
,
100 size_t count
, loff_t
*ppos
)
102 char buf
[15*NUM_RX_DATA_QUEUES
], *p
= buf
;
104 struct sta_info
*sta
= file
->private_data
;
105 for (i
= 0; i
< NUM_RX_DATA_QUEUES
; i
++)
106 p
+= scnprintf(p
, sizeof(buf
)+buf
-p
, "%x ",
107 le16_to_cpu(sta
->last_seq_ctrl
[i
]));
108 p
+= scnprintf(p
, sizeof(buf
)+buf
-p
, "\n");
109 return simple_read_from_buffer(userbuf
, count
, ppos
, buf
, p
- buf
);
111 STA_OPS(last_seq_ctrl
);
113 static ssize_t
sta_agg_status_read(struct file
*file
, char __user
*userbuf
,
114 size_t count
, loff_t
*ppos
)
116 char buf
[71 + STA_TID_NUM
* 40], *p
= buf
;
118 struct sta_info
*sta
= file
->private_data
;
120 spin_lock_bh(&sta
->lock
);
121 p
+= scnprintf(p
, sizeof(buf
) + buf
- p
, "next dialog_token: %#02x\n",
122 sta
->ampdu_mlme
.dialog_token_allocator
+ 1);
123 p
+= scnprintf(p
, sizeof(buf
) + buf
- p
,
124 "TID\t\tRX active\tDTKN\tSSN\t\tTX\tDTKN\tpending\n");
125 for (i
= 0; i
< STA_TID_NUM
; i
++) {
126 p
+= scnprintf(p
, sizeof(buf
) + buf
- p
, "%02d", i
);
127 p
+= scnprintf(p
, sizeof(buf
) + buf
- p
, "\t\t%x",
128 !!sta
->ampdu_mlme
.tid_rx
[i
]);
129 p
+= scnprintf(p
, sizeof(buf
) + buf
- p
, "\t%#.2x",
130 sta
->ampdu_mlme
.tid_rx
[i
] ?
131 sta
->ampdu_mlme
.tid_rx
[i
]->dialog_token
: 0);
132 p
+= scnprintf(p
, sizeof(buf
) + buf
- p
, "\t%#.3x",
133 sta
->ampdu_mlme
.tid_rx
[i
] ?
134 sta
->ampdu_mlme
.tid_rx
[i
]->ssn
: 0);
136 p
+= scnprintf(p
, sizeof(buf
) + buf
- p
, "\t\t%x",
137 !!sta
->ampdu_mlme
.tid_tx
[i
]);
138 p
+= scnprintf(p
, sizeof(buf
) + buf
- p
, "\t%#.2x",
139 sta
->ampdu_mlme
.tid_tx
[i
] ?
140 sta
->ampdu_mlme
.tid_tx
[i
]->dialog_token
: 0);
141 p
+= scnprintf(p
, sizeof(buf
) + buf
- p
, "\t%03d",
142 sta
->ampdu_mlme
.tid_tx
[i
] ?
143 skb_queue_len(&sta
->ampdu_mlme
.tid_tx
[i
]->pending
) : 0);
144 p
+= scnprintf(p
, sizeof(buf
) + buf
- p
, "\n");
146 spin_unlock_bh(&sta
->lock
);
148 return simple_read_from_buffer(userbuf
, count
, ppos
, buf
, p
- buf
);
151 static ssize_t
sta_agg_status_write(struct file
*file
, const char __user
*userbuf
,
152 size_t count
, loff_t
*ppos
)
154 char _buf
[12], *buf
= _buf
;
155 struct sta_info
*sta
= file
->private_data
;
160 if (count
> sizeof(_buf
))
163 if (copy_from_user(buf
, userbuf
, count
))
166 buf
[sizeof(_buf
) - 1] = '\0';
168 if (strncmp(buf
, "tx ", 3) == 0) {
171 } else if (strncmp(buf
, "rx ", 3) == 0) {
177 if (strncmp(buf
, "start ", 6) == 0) {
182 } else if (strncmp(buf
, "stop ", 5) == 0) {
188 tid
= simple_strtoul(buf
, NULL
, 0);
190 if (tid
>= STA_TID_NUM
)
195 ret
= ieee80211_start_tx_ba_session(&sta
->sta
, tid
);
197 ret
= ieee80211_stop_tx_ba_session(&sta
->sta
, tid
);
199 __ieee80211_stop_rx_ba_session(sta
, tid
, WLAN_BACK_RECIPIENT
, 3);
205 STA_OPS_RW(agg_status
);
207 static ssize_t
sta_ht_capa_read(struct file
*file
, char __user
*userbuf
,
208 size_t count
, loff_t
*ppos
)
210 #define PRINT_HT_CAP(_cond, _str) \
213 p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \
215 char buf
[512], *p
= buf
;
217 struct sta_info
*sta
= file
->private_data
;
218 struct ieee80211_sta_ht_cap
*htc
= &sta
->sta
.ht_cap
;
220 p
+= scnprintf(p
, sizeof(buf
) + buf
- p
, "ht %ssupported\n",
221 htc
->ht_supported
? "" : "not ");
222 if (htc
->ht_supported
) {
223 p
+= scnprintf(p
, sizeof(buf
)+buf
-p
, "cap: %#.4x\n", htc
->cap
);
225 PRINT_HT_CAP((htc
->cap
& BIT(0)), "RX LDPC");
226 PRINT_HT_CAP((htc
->cap
& BIT(1)), "HT20/HT40");
227 PRINT_HT_CAP(!(htc
->cap
& BIT(1)), "HT20");
229 PRINT_HT_CAP(((htc
->cap
>> 2) & 0x3) == 0, "Static SM Power Save");
230 PRINT_HT_CAP(((htc
->cap
>> 2) & 0x3) == 1, "Dynamic SM Power Save");
231 PRINT_HT_CAP(((htc
->cap
>> 2) & 0x3) == 3, "SM Power Save disabled");
233 PRINT_HT_CAP((htc
->cap
& BIT(4)), "RX Greenfield");
234 PRINT_HT_CAP((htc
->cap
& BIT(5)), "RX HT20 SGI");
235 PRINT_HT_CAP((htc
->cap
& BIT(6)), "RX HT40 SGI");
236 PRINT_HT_CAP((htc
->cap
& BIT(7)), "TX STBC");
238 PRINT_HT_CAP(((htc
->cap
>> 8) & 0x3) == 0, "No RX STBC");
239 PRINT_HT_CAP(((htc
->cap
>> 8) & 0x3) == 1, "RX STBC 1-stream");
240 PRINT_HT_CAP(((htc
->cap
>> 8) & 0x3) == 2, "RX STBC 2-streams");
241 PRINT_HT_CAP(((htc
->cap
>> 8) & 0x3) == 3, "RX STBC 3-streams");
243 PRINT_HT_CAP((htc
->cap
& BIT(10)), "HT Delayed Block Ack");
245 PRINT_HT_CAP((htc
->cap
& BIT(11)), "Max AMSDU length: "
247 PRINT_HT_CAP(!(htc
->cap
& BIT(11)), "Max AMSDU length: "
251 * For beacons and probe response this would mean the BSS
252 * does or does not allow the usage of DSSS/CCK HT40.
253 * Otherwise it means the STA does or does not use
256 PRINT_HT_CAP((htc
->cap
& BIT(12)), "DSSS/CCK HT40");
257 PRINT_HT_CAP(!(htc
->cap
& BIT(12)), "No DSSS/CCK HT40");
259 /* BIT(13) is reserved */
261 PRINT_HT_CAP((htc
->cap
& BIT(14)), "40 MHz Intolerant");
263 PRINT_HT_CAP((htc
->cap
& BIT(15)), "L-SIG TXOP protection");
265 p
+= scnprintf(p
, sizeof(buf
)+buf
-p
, "ampdu factor/density: %d/%d\n",
266 htc
->ampdu_factor
, htc
->ampdu_density
);
267 p
+= scnprintf(p
, sizeof(buf
)+buf
-p
, "MCS mask:");
269 for (i
= 0; i
< IEEE80211_HT_MCS_MASK_LEN
; i
++)
270 p
+= scnprintf(p
, sizeof(buf
)+buf
-p
, " %.2x",
271 htc
->mcs
.rx_mask
[i
]);
272 p
+= scnprintf(p
, sizeof(buf
)+buf
-p
, "\n");
274 /* If not set this is meaningless */
275 if (le16_to_cpu(htc
->mcs
.rx_highest
)) {
276 p
+= scnprintf(p
, sizeof(buf
)+buf
-p
,
277 "MCS rx highest: %d Mbps\n",
278 le16_to_cpu(htc
->mcs
.rx_highest
));
281 p
+= scnprintf(p
, sizeof(buf
)+buf
-p
, "MCS tx params: %x\n",
285 return simple_read_from_buffer(userbuf
, count
, ppos
, buf
, p
- buf
);
289 #define DEBUGFS_ADD(name) \
290 debugfs_create_file(#name, 0400, \
291 sta->debugfs.dir, sta, &sta_ ##name## _ops);
293 #define DEBUGFS_ADD_COUNTER(name, field) \
294 if (sizeof(sta->field) == sizeof(u32)) \
295 debugfs_create_u32(#name, 0400, sta->debugfs.dir, \
296 (u32 *) &sta->field); \
298 debugfs_create_u64(#name, 0400, sta->debugfs.dir, \
299 (u64 *) &sta->field);
301 void ieee80211_sta_debugfs_add(struct sta_info
*sta
)
303 struct dentry
*stations_dir
= sta
->local
->debugfs
.stations
;
306 sta
->debugfs
.add_has_run
= true;
311 snprintf(mac
, sizeof(mac
), "%pM", sta
->sta
.addr
);
314 * This might fail due to a race condition:
315 * When mac80211 unlinks a station, the debugfs entries
316 * remain, but it is already possible to link a new
317 * station with the same address which triggers adding
318 * it to debugfs; therefore, if the old station isn't
319 * destroyed quickly enough the old station's debugfs
320 * dir might still be around.
322 sta
->debugfs
.dir
= debugfs_create_dir(mac
, stations_dir
);
323 if (!sta
->debugfs
.dir
)
327 DEBUGFS_ADD(num_ps_buf_frames
);
328 DEBUGFS_ADD(inactive_ms
);
329 DEBUGFS_ADD(last_seq_ctrl
);
330 DEBUGFS_ADD(agg_status
);
332 DEBUGFS_ADD(last_signal
);
333 DEBUGFS_ADD(ht_capa
);
335 DEBUGFS_ADD_COUNTER(rx_packets
, rx_packets
);
336 DEBUGFS_ADD_COUNTER(tx_packets
, tx_packets
);
337 DEBUGFS_ADD_COUNTER(rx_bytes
, rx_bytes
);
338 DEBUGFS_ADD_COUNTER(tx_bytes
, tx_bytes
);
339 DEBUGFS_ADD_COUNTER(rx_duplicates
, num_duplicates
);
340 DEBUGFS_ADD_COUNTER(rx_fragments
, rx_fragments
);
341 DEBUGFS_ADD_COUNTER(rx_dropped
, rx_dropped
);
342 DEBUGFS_ADD_COUNTER(tx_fragments
, tx_fragments
);
343 DEBUGFS_ADD_COUNTER(tx_filtered
, tx_filtered_count
);
344 DEBUGFS_ADD_COUNTER(tx_retry_failed
, tx_retry_failed
);
345 DEBUGFS_ADD_COUNTER(tx_retry_count
, tx_retry_count
);
346 DEBUGFS_ADD_COUNTER(wep_weak_iv_count
, wep_weak_iv_count
);
349 void ieee80211_sta_debugfs_remove(struct sta_info
*sta
)
351 debugfs_remove_recursive(sta
->debugfs
.dir
);
352 sta
->debugfs
.dir
= NULL
;