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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 | * |
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 | |
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) \ |
24 | { \ |
25 | int res; \ |
26 | struct sta_info *sta = file->private_data; \ |
27 | char buf[buflen]; \ |
28 | res = scnprintf(buf, buflen, format_string, sta->field); \ |
29 | return simple_read_from_buffer(userbuf, count, ppos, buf, res); \ |
30 | } |
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") |
34 | |
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, \ |
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 = mac80211_open_file_generic, \ |
46 | } |
47 | |
48 | #define STA_FILE(name, field, format) \ |
49 | STA_READ_##format(name, field) \ |
50 | STA_OPS(name) |
51 | |
52 | STA_FILE(aid, sta.aid, D); |
53 | STA_FILE(dev, sdata->name, S); |
54 | STA_FILE(last_signal, last_signal, D); |
55 | |
56 | static 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; |
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); |
73 | } |
74 | STA_OPS(flags); |
75 | |
76 | static ssize_t sta_num_ps_buf_frames_read(struct file *file, |
77 | char __user *userbuf, |
78 | size_t count, loff_t *ppos) |
79 | { |
80 | char buf[20]; |
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); |
85 | } |
86 | STA_OPS(num_ps_buf_frames); |
87 | |
88 | static ssize_t sta_inactive_ms_read(struct file *file, char __user *userbuf, |
89 | size_t count, loff_t *ppos) |
90 | { |
91 | char buf[20]; |
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); |
96 | } |
97 | STA_OPS(inactive_ms); |
98 | |
99 | static ssize_t sta_last_seq_ctrl_read(struct file *file, char __user *userbuf, |
100 | size_t count, loff_t *ppos) |
101 | { |
102 | char buf[15*NUM_RX_DATA_QUEUES], *p = buf; |
103 | int i; |
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); |
110 | } |
111 | STA_OPS(last_seq_ctrl); |
112 | |
113 | static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf, |
114 | size_t count, loff_t *ppos) |
115 | { |
116 | char buf[71 + STA_TID_NUM * 40], *p = buf; |
117 | int i; |
118 | struct sta_info *sta = file->private_data; |
119 | |
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); |
135 | |
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"); |
145 | } |
146 | spin_unlock_bh(&sta->lock); |
147 | |
148 | return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); |
149 | } |
150 | |
151 | static ssize_t sta_agg_status_write(struct file *file, const char __user *userbuf, |
152 | size_t count, loff_t *ppos) |
153 | { |
154 | char _buf[12], *buf = _buf; |
155 | struct sta_info *sta = file->private_data; |
156 | bool start, tx; |
157 | unsigned long tid; |
158 | int ret; |
159 | |
160 | if (count > sizeof(_buf)) |
161 | return -EINVAL; |
162 | |
163 | if (copy_from_user(buf, userbuf, count)) |
164 | return -EFAULT; |
165 | |
166 | buf[sizeof(_buf) - 1] = '\0'; |
167 | |
168 | if (strncmp(buf, "tx ", 3) == 0) { |
169 | buf += 3; |
170 | tx = true; |
171 | } else if (strncmp(buf, "rx ", 3) == 0) { |
172 | buf += 3; |
173 | tx = false; |
174 | } else |
175 | return -EINVAL; |
176 | |
177 | if (strncmp(buf, "start ", 6) == 0) { |
178 | buf += 6; |
179 | start = true; |
180 | if (!tx) |
181 | return -EINVAL; |
182 | } else if (strncmp(buf, "stop ", 5) == 0) { |
183 | buf += 5; |
184 | start = false; |
185 | } else |
186 | return -EINVAL; |
187 | |
188 | tid = simple_strtoul(buf, NULL, 0); |
189 | |
190 | if (tid >= STA_TID_NUM) |
191 | return -EINVAL; |
192 | |
193 | if (tx) { |
194 | if (start) |
195 | ret = ieee80211_start_tx_ba_session(&sta->sta, tid); |
196 | else |
197 | ret = ieee80211_stop_tx_ba_session(&sta->sta, tid); |
198 | } else { |
199 | __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT, 3); |
200 | ret = 0; |
201 | } |
202 | |
203 | return ret ?: count; |
204 | } |
205 | STA_OPS_RW(agg_status); |
206 | |
207 | static ssize_t sta_ht_capa_read(struct file *file, char __user *userbuf, |
208 | size_t count, loff_t *ppos) |
209 | { |
210 | #define PRINT_HT_CAP(_cond, _str) \ |
211 | do { \ |
212 | if (_cond) \ |
213 | p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \ |
214 | } while (0) |
215 | char buf[512], *p = buf; |
216 | int i; |
217 | struct sta_info *sta = file->private_data; |
218 | struct ieee80211_sta_ht_cap *htc = &sta->sta.ht_cap; |
219 | |
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); |
224 | |
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"); |
228 | |
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"); |
232 | |
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"); |
237 | |
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"); |
242 | |
243 | PRINT_HT_CAP((htc->cap & BIT(10)), "HT Delayed Block Ack"); |
244 | |
245 | PRINT_HT_CAP((htc->cap & BIT(11)), "Max AMSDU length: " |
246 | "3839 bytes"); |
247 | PRINT_HT_CAP(!(htc->cap & BIT(11)), "Max AMSDU length: " |
248 | "7935 bytes"); |
249 | |
250 | /* |
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 |
254 | * DSSS/CCK HT40. |
255 | */ |
256 | PRINT_HT_CAP((htc->cap & BIT(12)), "DSSS/CCK HT40"); |
257 | PRINT_HT_CAP(!(htc->cap & BIT(12)), "No DSSS/CCK HT40"); |
258 | |
259 | /* BIT(13) is reserved */ |
260 | |
261 | PRINT_HT_CAP((htc->cap & BIT(14)), "40 MHz Intolerant"); |
262 | |
263 | PRINT_HT_CAP((htc->cap & BIT(15)), "L-SIG TXOP protection"); |
264 | |
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:"); |
268 | |
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"); |
273 | |
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)); |
279 | } |
280 | |
281 | p += scnprintf(p, sizeof(buf)+buf-p, "MCS tx params: %x\n", |
282 | htc->mcs.tx_params); |
283 | } |
284 | |
285 | return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); |
286 | } |
287 | STA_OPS(ht_capa); |
288 | |
289 | #define DEBUGFS_ADD(name) \ |
290 | debugfs_create_file(#name, 0400, \ |
291 | sta->debugfs.dir, sta, &sta_ ##name## _ops); |
292 | |
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); \ |
297 | else \ |
298 | debugfs_create_u64(#name, 0400, sta->debugfs.dir, \ |
299 | (u64 *) &sta->field); |
300 | |
301 | void ieee80211_sta_debugfs_add(struct sta_info *sta) |
302 | { |
303 | struct dentry *stations_dir = sta->local->debugfs.stations; |
304 | u8 mac[3*ETH_ALEN]; |
305 | |
306 | sta->debugfs.add_has_run = true; |
307 | |
308 | if (!stations_dir) |
309 | return; |
310 | |
311 | snprintf(mac, sizeof(mac), "%pM", sta->sta.addr); |
312 | |
313 | /* |
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. |
321 | */ |
322 | sta->debugfs.dir = debugfs_create_dir(mac, stations_dir); |
323 | if (!sta->debugfs.dir) |
324 | return; |
325 | |
326 | DEBUGFS_ADD(flags); |
327 | DEBUGFS_ADD(num_ps_buf_frames); |
328 | DEBUGFS_ADD(inactive_ms); |
329 | DEBUGFS_ADD(last_seq_ctrl); |
330 | DEBUGFS_ADD(agg_status); |
331 | DEBUGFS_ADD(dev); |
332 | DEBUGFS_ADD(last_signal); |
333 | DEBUGFS_ADD(ht_capa); |
334 | |
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); |
347 | } |
348 | |
349 | void ieee80211_sta_debugfs_remove(struct sta_info *sta) |
350 | { |
351 | debugfs_remove_recursive(sta->debugfs.dir); |
352 | sta->debugfs.dir = NULL; |
353 | } |
354 |
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