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_LU(name, field) STA_READ(name, 20, field, "%lu\n")
34 #define STA_READ_S(name, field) STA_READ(name, 20, field, "%s\n")
36 #define STA_OPS(name) \
37 static const struct file_operations sta_ ##name## _ops = { \
38 .read = sta_##name##_read, \
39 .open = mac80211_open_file_generic, \
42 #define STA_FILE(name, field, format) \
43 STA_READ_##format(name, field) \
46 STA_FILE(aid
, sta
.aid
, D
);
47 STA_FILE(dev
, sdata
->name
, S
);
48 STA_FILE(rx_packets
, rx_packets
, LU
);
49 STA_FILE(tx_packets
, tx_packets
, LU
);
50 STA_FILE(rx_bytes
, rx_bytes
, LU
);
51 STA_FILE(tx_bytes
, tx_bytes
, LU
);
52 STA_FILE(rx_duplicates
, num_duplicates
, LU
);
53 STA_FILE(rx_fragments
, rx_fragments
, LU
);
54 STA_FILE(rx_dropped
, rx_dropped
, LU
);
55 STA_FILE(tx_fragments
, tx_fragments
, LU
);
56 STA_FILE(tx_filtered
, tx_filtered_count
, LU
);
57 STA_FILE(tx_retry_failed
, tx_retry_failed
, LU
);
58 STA_FILE(tx_retry_count
, tx_retry_count
, LU
);
59 STA_FILE(last_signal
, last_signal
, D
);
60 STA_FILE(last_noise
, last_noise
, D
);
61 STA_FILE(wep_weak_iv_count
, wep_weak_iv_count
, LU
);
63 static ssize_t
sta_flags_read(struct file
*file
, char __user
*userbuf
,
64 size_t count
, loff_t
*ppos
)
67 struct sta_info
*sta
= file
->private_data
;
68 u32 staflags
= get_sta_flags(sta
);
69 int res
= scnprintf(buf
, sizeof(buf
), "%s%s%s%s%s%s%s%s%s",
70 staflags
& WLAN_STA_AUTH
? "AUTH\n" : "",
71 staflags
& WLAN_STA_ASSOC
? "ASSOC\n" : "",
72 staflags
& WLAN_STA_PS_STA
? "PS (sta)\n" : "",
73 staflags
& WLAN_STA_PS_DRIVER
? "PS (driver)\n" : "",
74 staflags
& WLAN_STA_AUTHORIZED
? "AUTHORIZED\n" : "",
75 staflags
& WLAN_STA_SHORT_PREAMBLE
? "SHORT PREAMBLE\n" : "",
76 staflags
& WLAN_STA_WME
? "WME\n" : "",
77 staflags
& WLAN_STA_WDS
? "WDS\n" : "",
78 staflags
& WLAN_STA_MFP
? "MFP\n" : "");
79 return simple_read_from_buffer(userbuf
, count
, ppos
, buf
, res
);
83 static ssize_t
sta_num_ps_buf_frames_read(struct file
*file
,
85 size_t count
, loff_t
*ppos
)
88 struct sta_info
*sta
= file
->private_data
;
89 int res
= scnprintf(buf
, sizeof(buf
), "%u\n",
90 skb_queue_len(&sta
->ps_tx_buf
));
91 return simple_read_from_buffer(userbuf
, count
, ppos
, buf
, res
);
93 STA_OPS(num_ps_buf_frames
);
95 static ssize_t
sta_inactive_ms_read(struct file
*file
, char __user
*userbuf
,
96 size_t count
, loff_t
*ppos
)
99 struct sta_info
*sta
= file
->private_data
;
100 int res
= scnprintf(buf
, sizeof(buf
), "%d\n",
101 jiffies_to_msecs(jiffies
- sta
->last_rx
));
102 return simple_read_from_buffer(userbuf
, count
, ppos
, buf
, res
);
104 STA_OPS(inactive_ms
);
106 static ssize_t
sta_last_seq_ctrl_read(struct file
*file
, char __user
*userbuf
,
107 size_t count
, loff_t
*ppos
)
109 char buf
[15*NUM_RX_DATA_QUEUES
], *p
= buf
;
111 struct sta_info
*sta
= file
->private_data
;
112 for (i
= 0; i
< NUM_RX_DATA_QUEUES
; i
++)
113 p
+= scnprintf(p
, sizeof(buf
)+buf
-p
, "%x ",
114 le16_to_cpu(sta
->last_seq_ctrl
[i
]));
115 p
+= scnprintf(p
, sizeof(buf
)+buf
-p
, "\n");
116 return simple_read_from_buffer(userbuf
, count
, ppos
, buf
, p
- buf
);
118 STA_OPS(last_seq_ctrl
);
120 static ssize_t
sta_agg_status_read(struct file
*file
, char __user
*userbuf
,
121 size_t count
, loff_t
*ppos
)
123 char buf
[30 + STA_TID_NUM
* 70], *p
= buf
;
125 struct sta_info
*sta
= file
->private_data
;
127 spin_lock_bh(&sta
->lock
);
128 p
+= scnprintf(p
, sizeof(buf
)+buf
-p
, "next dialog_token is %#02x\n",
129 sta
->ampdu_mlme
.dialog_token_allocator
+ 1);
130 for (i
= 0; i
< STA_TID_NUM
; i
++) {
131 p
+= scnprintf(p
, sizeof(buf
)+buf
-p
, "TID %02d:", i
);
132 p
+= scnprintf(p
, sizeof(buf
)+buf
-p
, " RX=%x",
133 sta
->ampdu_mlme
.tid_state_rx
[i
]);
134 p
+= scnprintf(p
, sizeof(buf
)+buf
-p
, "/DTKN=%#.2x",
135 sta
->ampdu_mlme
.tid_state_rx
[i
] ?
136 sta
->ampdu_mlme
.tid_rx
[i
]->dialog_token
: 0);
137 p
+= scnprintf(p
, sizeof(buf
)+buf
-p
, "/SSN=%#.3x",
138 sta
->ampdu_mlme
.tid_state_rx
[i
] ?
139 sta
->ampdu_mlme
.tid_rx
[i
]->ssn
: 0);
141 p
+= scnprintf(p
, sizeof(buf
)+buf
-p
, " TX=%x",
142 sta
->ampdu_mlme
.tid_state_tx
[i
]);
143 p
+= scnprintf(p
, sizeof(buf
)+buf
-p
, "/DTKN=%#.2x",
144 sta
->ampdu_mlme
.tid_state_tx
[i
] ?
145 sta
->ampdu_mlme
.tid_tx
[i
]->dialog_token
: 0);
146 p
+= scnprintf(p
, sizeof(buf
)+buf
-p
, "/SSN=%#.3x",
147 sta
->ampdu_mlme
.tid_state_tx
[i
] ?
148 sta
->ampdu_mlme
.tid_tx
[i
]->ssn
: 0);
149 p
+= scnprintf(p
, sizeof(buf
)+buf
-p
, "/pending=%03d",
150 sta
->ampdu_mlme
.tid_state_tx
[i
] ?
151 skb_queue_len(&sta
->ampdu_mlme
.tid_tx
[i
]->pending
) : 0);
152 p
+= scnprintf(p
, sizeof(buf
)+buf
-p
, "\n");
154 spin_unlock_bh(&sta
->lock
);
156 return simple_read_from_buffer(userbuf
, count
, ppos
, buf
, p
- buf
);
160 static ssize_t
sta_ht_capa_read(struct file
*file
, char __user
*userbuf
,
161 size_t count
, loff_t
*ppos
)
163 #define PRINT_HT_CAP(_cond, _str) \
166 p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \
168 char buf
[1024], *p
= buf
;
170 struct sta_info
*sta
= file
->private_data
;
171 struct ieee80211_sta_ht_cap
*htc
= &sta
->sta
.ht_cap
;
173 p
+= scnprintf(p
, sizeof(buf
) + buf
- p
, "ht %ssupported\n",
174 htc
->ht_supported
? "" : "not ");
175 if (htc
->ht_supported
) {
176 p
+= scnprintf(p
, sizeof(buf
)+buf
-p
, "cap: %#.4x\n", htc
->cap
);
178 PRINT_HT_CAP((htc
->cap
& BIT(0)), "RX LDCP");
179 PRINT_HT_CAP((htc
->cap
& BIT(1)), "HT20/HT40");
180 PRINT_HT_CAP(!(htc
->cap
& BIT(1)), "HT20");
182 PRINT_HT_CAP(((htc
->cap
>> 2) & 0x3) == 0, "Static SM Power Save");
183 PRINT_HT_CAP(((htc
->cap
>> 2) & 0x3) == 1, "Dynamic SM Power Save");
184 PRINT_HT_CAP(((htc
->cap
>> 2) & 0x3) == 3, "SM Power Save disabled");
186 PRINT_HT_CAP((htc
->cap
& BIT(4)), "RX Greenfield");
187 PRINT_HT_CAP((htc
->cap
& BIT(5)), "RX HT20 SGI");
188 PRINT_HT_CAP((htc
->cap
& BIT(6)), "RX HT40 SGI");
189 PRINT_HT_CAP((htc
->cap
& BIT(7)), "TX STBC");
191 PRINT_HT_CAP(((htc
->cap
>> 8) & 0x3) == 0, "No RX STBC");
192 PRINT_HT_CAP(((htc
->cap
>> 8) & 0x3) == 1, "RX STBC 1-stream");
193 PRINT_HT_CAP(((htc
->cap
>> 8) & 0x3) == 2, "RX STBC 2-streams");
194 PRINT_HT_CAP(((htc
->cap
>> 8) & 0x3) == 3, "RX STBC 3-streams");
196 PRINT_HT_CAP((htc
->cap
& BIT(10)), "HT Delayed Block Ack");
198 PRINT_HT_CAP((htc
->cap
& BIT(11)), "Max AMSDU length: "
200 PRINT_HT_CAP(!(htc
->cap
& BIT(11)), "Max AMSDU length: "
204 * For beacons and probe response this would mean the BSS
205 * does or does not allow the usage of DSSS/CCK HT40.
206 * Otherwise it means the STA does or does not use
209 PRINT_HT_CAP((htc
->cap
& BIT(12)), "DSSS/CCK HT40");
210 PRINT_HT_CAP(!(htc
->cap
& BIT(12)), "No DSSS/CCK HT40");
212 /* BIT(13) is reserved */
214 PRINT_HT_CAP((htc
->cap
& BIT(14)), "40 MHz Intolerant");
216 PRINT_HT_CAP((htc
->cap
& BIT(15)), "L-SIG TXOP protection");
218 p
+= scnprintf(p
, sizeof(buf
)+buf
-p
, "ampdu factor/density: %d/%d\n",
219 htc
->ampdu_factor
, htc
->ampdu_density
);
220 p
+= scnprintf(p
, sizeof(buf
)+buf
-p
, "MCS mask:");
221 for (i
= 0; i
< IEEE80211_HT_MCS_MASK_LEN
; i
++)
222 p
+= scnprintf(p
, sizeof(buf
)+buf
-p
, " %.2x",
223 htc
->mcs
.rx_mask
[i
]);
224 p
+= scnprintf(p
, sizeof(buf
)+buf
-p
, "\nMCS rx highest: %d\n",
225 le16_to_cpu(htc
->mcs
.rx_highest
));
226 p
+= scnprintf(p
, sizeof(buf
)+buf
-p
, "MCS tx params: %x\n",
230 return simple_read_from_buffer(userbuf
, count
, ppos
, buf
, p
- buf
);
234 #define DEBUGFS_ADD(name) \
235 debugfs_create_file(#name, 0400, \
236 sta->debugfs.dir, sta, &sta_ ##name## _ops);
239 void ieee80211_sta_debugfs_add(struct sta_info
*sta
)
241 struct dentry
*stations_dir
= sta
->local
->debugfs
.stations
;
244 sta
->debugfs
.add_has_run
= true;
249 snprintf(mac
, sizeof(mac
), "%pM", sta
->sta
.addr
);
252 * This might fail due to a race condition:
253 * When mac80211 unlinks a station, the debugfs entries
254 * remain, but it is already possible to link a new
255 * station with the same address which triggers adding
256 * it to debugfs; therefore, if the old station isn't
257 * destroyed quickly enough the old station's debugfs
258 * dir might still be around.
260 sta
->debugfs
.dir
= debugfs_create_dir(mac
, stations_dir
);
261 if (!sta
->debugfs
.dir
)
265 DEBUGFS_ADD(num_ps_buf_frames
);
266 DEBUGFS_ADD(inactive_ms
);
267 DEBUGFS_ADD(last_seq_ctrl
);
268 DEBUGFS_ADD(agg_status
);
270 DEBUGFS_ADD(rx_packets
);
271 DEBUGFS_ADD(tx_packets
);
272 DEBUGFS_ADD(rx_bytes
);
273 DEBUGFS_ADD(tx_bytes
);
274 DEBUGFS_ADD(rx_duplicates
);
275 DEBUGFS_ADD(rx_fragments
);
276 DEBUGFS_ADD(rx_dropped
);
277 DEBUGFS_ADD(tx_fragments
);
278 DEBUGFS_ADD(tx_filtered
);
279 DEBUGFS_ADD(tx_retry_failed
);
280 DEBUGFS_ADD(tx_retry_count
);
281 DEBUGFS_ADD(last_signal
);
282 DEBUGFS_ADD(last_noise
);
283 DEBUGFS_ADD(wep_weak_iv_count
);
284 DEBUGFS_ADD(ht_capa
);
287 void ieee80211_sta_debugfs_remove(struct sta_info
*sta
)
289 debugfs_remove_recursive(sta
->debugfs
.dir
);
290 sta
->debugfs
.dir
= NULL
;