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(wep_weak_iv_count, wep_weak_iv_count, LU);
62 static ssize_t sta_flags_read(struct file *file, char __user *userbuf,
63 size_t count, loff_t *ppos)
66 struct sta_info *sta = file->private_data;
67 u32 staflags = get_sta_flags(sta);
68 int res = scnprintf(buf, sizeof(buf), "%s%s%s%s%s%s%s%s%s",
69 staflags & WLAN_STA_AUTH ? "AUTH\n" : "",
70 staflags & WLAN_STA_ASSOC ? "ASSOC\n" : "",
71 staflags & WLAN_STA_PS_STA ? "PS (sta)\n" : "",
72 staflags & WLAN_STA_PS_DRIVER ? "PS (driver)\n" : "",
73 staflags & WLAN_STA_AUTHORIZED ? "AUTHORIZED\n" : "",
74 staflags & WLAN_STA_SHORT_PREAMBLE ? "SHORT PREAMBLE\n" : "",
75 staflags & WLAN_STA_WME ? "WME\n" : "",
76 staflags & WLAN_STA_WDS ? "WDS\n" : "",
77 staflags & WLAN_STA_MFP ? "MFP\n" : "");
78 return simple_read_from_buffer(userbuf, count, ppos, buf, res);
82 static ssize_t sta_num_ps_buf_frames_read(struct file *file,
84 size_t count, loff_t *ppos)
87 struct sta_info *sta = file->private_data;
88 int res = scnprintf(buf, sizeof(buf), "%u\n",
89 skb_queue_len(&sta->ps_tx_buf));
90 return simple_read_from_buffer(userbuf, count, ppos, buf, res);
92 STA_OPS(num_ps_buf_frames);
94 static ssize_t sta_inactive_ms_read(struct file *file, char __user *userbuf,
95 size_t count, loff_t *ppos)
98 struct sta_info *sta = file->private_data;
99 int res = scnprintf(buf, sizeof(buf), "%d\n",
100 jiffies_to_msecs(jiffies - sta->last_rx));
101 return simple_read_from_buffer(userbuf, count, ppos, buf, res);
103 STA_OPS(inactive_ms);
105 static ssize_t sta_last_seq_ctrl_read(struct file *file, char __user *userbuf,
106 size_t count, loff_t *ppos)
108 char buf[15*NUM_RX_DATA_QUEUES], *p = buf;
110 struct sta_info *sta = file->private_data;
111 for (i = 0; i < NUM_RX_DATA_QUEUES; i++)
112 p += scnprintf(p, sizeof(buf)+buf-p, "%x ",
113 le16_to_cpu(sta->last_seq_ctrl[i]));
114 p += scnprintf(p, sizeof(buf)+buf-p, "\n");
115 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
117 STA_OPS(last_seq_ctrl);
119 static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf,
120 size_t count, loff_t *ppos)
122 char buf[71 + STA_TID_NUM * 40], *p = buf;
124 struct sta_info *sta = file->private_data;
126 spin_lock_bh(&sta->lock);
127 p += scnprintf(p, sizeof(buf) + buf - p, "next dialog_token: %#02x\n",
128 sta->ampdu_mlme.dialog_token_allocator + 1);
129 p += scnprintf(p, sizeof(buf) + buf - p,
130 "TID\t\tRX active\tDTKN\tSSN\t\tTX\tDTKN\tSSN\tpending\n");
131 for (i = 0; i < STA_TID_NUM; i++) {
132 p += scnprintf(p, sizeof(buf) + buf - p, "%02d", i);
133 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x",
134 sta->ampdu_mlme.tid_active_rx[i]);
135 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
136 sta->ampdu_mlme.tid_active_rx[i] ?
137 sta->ampdu_mlme.tid_rx[i]->dialog_token : 0);
138 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x",
139 sta->ampdu_mlme.tid_active_rx[i] ?
140 sta->ampdu_mlme.tid_rx[i]->ssn : 0);
142 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x",
143 sta->ampdu_mlme.tid_state_tx[i]);
144 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
145 sta->ampdu_mlme.tid_state_tx[i] ?
146 sta->ampdu_mlme.tid_tx[i]->dialog_token : 0);
147 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x",
148 sta->ampdu_mlme.tid_state_tx[i] ?
149 sta->ampdu_mlme.tid_tx[i]->ssn : 0);
150 p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d",
151 sta->ampdu_mlme.tid_state_tx[i] ?
152 skb_queue_len(&sta->ampdu_mlme.tid_tx[i]->pending) : 0);
153 p += scnprintf(p, sizeof(buf) + buf - p, "\n");
155 spin_unlock_bh(&sta->lock);
157 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
161 static ssize_t sta_ht_capa_read(struct file *file, char __user *userbuf,
162 size_t count, loff_t *ppos)
164 #define PRINT_HT_CAP(_cond, _str) \
167 p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \
169 char buf[512], *p = buf;
171 struct sta_info *sta = file->private_data;
172 struct ieee80211_sta_ht_cap *htc = &sta->sta.ht_cap;
174 p += scnprintf(p, sizeof(buf) + buf - p, "ht %ssupported\n",
175 htc->ht_supported ? "" : "not ");
176 if (htc->ht_supported) {
177 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.4x\n", htc->cap);
179 PRINT_HT_CAP((htc->cap & BIT(0)), "RX LDPC");
180 PRINT_HT_CAP((htc->cap & BIT(1)), "HT20/HT40");
181 PRINT_HT_CAP(!(htc->cap & BIT(1)), "HT20");
183 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 0, "Static SM Power Save");
184 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 1, "Dynamic SM Power Save");
185 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 3, "SM Power Save disabled");
187 PRINT_HT_CAP((htc->cap & BIT(4)), "RX Greenfield");
188 PRINT_HT_CAP((htc->cap & BIT(5)), "RX HT20 SGI");
189 PRINT_HT_CAP((htc->cap & BIT(6)), "RX HT40 SGI");
190 PRINT_HT_CAP((htc->cap & BIT(7)), "TX STBC");
192 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 0, "No RX STBC");
193 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 1, "RX STBC 1-stream");
194 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 2, "RX STBC 2-streams");
195 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 3, "RX STBC 3-streams");
197 PRINT_HT_CAP((htc->cap & BIT(10)), "HT Delayed Block Ack");
199 PRINT_HT_CAP((htc->cap & BIT(11)), "Max AMSDU length: "
201 PRINT_HT_CAP(!(htc->cap & BIT(11)), "Max AMSDU length: "
205 * For beacons and probe response this would mean the BSS
206 * does or does not allow the usage of DSSS/CCK HT40.
207 * Otherwise it means the STA does or does not use
210 PRINT_HT_CAP((htc->cap & BIT(12)), "DSSS/CCK HT40");
211 PRINT_HT_CAP(!(htc->cap & BIT(12)), "No DSSS/CCK HT40");
213 /* BIT(13) is reserved */
215 PRINT_HT_CAP((htc->cap & BIT(14)), "40 MHz Intolerant");
217 PRINT_HT_CAP((htc->cap & BIT(15)), "L-SIG TXOP protection");
219 p += scnprintf(p, sizeof(buf)+buf-p, "ampdu factor/density: %d/%d\n",
220 htc->ampdu_factor, htc->ampdu_density);
221 p += scnprintf(p, sizeof(buf)+buf-p, "MCS mask:");
223 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
224 p += scnprintf(p, sizeof(buf)+buf-p, " %.2x",
225 htc->mcs.rx_mask[i]);
226 p += scnprintf(p, sizeof(buf)+buf-p, "\n");
228 /* If not set this is meaningless */
229 if (le16_to_cpu(htc->mcs.rx_highest)) {
230 p += scnprintf(p, sizeof(buf)+buf-p,
231 "MCS rx highest: %d Mbps\n",
232 le16_to_cpu(htc->mcs.rx_highest));
235 p += scnprintf(p, sizeof(buf)+buf-p, "MCS tx params: %x\n",
239 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
243 #define DEBUGFS_ADD(name) \
244 debugfs_create_file(#name, 0400, \
245 sta->debugfs.dir, sta, &sta_ ##name## _ops);
248 void ieee80211_sta_debugfs_add(struct sta_info *sta)
250 struct dentry *stations_dir = sta->local->debugfs.stations;
253 sta->debugfs.add_has_run = true;
258 snprintf(mac, sizeof(mac), "%pM", sta->sta.addr);
261 * This might fail due to a race condition:
262 * When mac80211 unlinks a station, the debugfs entries
263 * remain, but it is already possible to link a new
264 * station with the same address which triggers adding
265 * it to debugfs; therefore, if the old station isn't
266 * destroyed quickly enough the old station's debugfs
267 * dir might still be around.
269 sta->debugfs.dir = debugfs_create_dir(mac, stations_dir);
270 if (!sta->debugfs.dir)
274 DEBUGFS_ADD(num_ps_buf_frames);
275 DEBUGFS_ADD(inactive_ms);
276 DEBUGFS_ADD(last_seq_ctrl);
277 DEBUGFS_ADD(agg_status);
279 DEBUGFS_ADD(rx_packets);
280 DEBUGFS_ADD(tx_packets);
281 DEBUGFS_ADD(rx_bytes);
282 DEBUGFS_ADD(tx_bytes);
283 DEBUGFS_ADD(rx_duplicates);
284 DEBUGFS_ADD(rx_fragments);
285 DEBUGFS_ADD(rx_dropped);
286 DEBUGFS_ADD(tx_fragments);
287 DEBUGFS_ADD(tx_filtered);
288 DEBUGFS_ADD(tx_retry_failed);
289 DEBUGFS_ADD(tx_retry_count);
290 DEBUGFS_ADD(last_signal);
291 DEBUGFS_ADD(wep_weak_iv_count);
292 DEBUGFS_ADD(ht_capa);
295 void ieee80211_sta_debugfs_remove(struct sta_info *sta)
297 debugfs_remove_recursive(sta->debugfs.dir);
298 sta->debugfs.dir = NULL;