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xhci: Always set urb->status to zero for isoc endpoints.
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / mac80211 / debugfs_sta.c
blobc04a1396cf8d94e4ff6d467cb1f98a3a1133f5be
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, 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 struct sta_info *sta = file->private_data; \
26 return mac80211_format_buffer(userbuf, count, ppos, \
27 format_string, sta->field); \
28 }
29 #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")
32
33 #define STA_OPS(name) \
34 static const struct file_operations sta_ ##name## _ops = { \
35 .read = sta_##name##_read, \
36 .open = mac80211_open_file_generic, \
37 .llseek = generic_file_llseek, \
38 }
39
40 #define STA_OPS_RW(name) \
41 static const struct file_operations sta_ ##name## _ops = { \
42 .read = sta_##name##_read, \
43 .write = sta_##name##_write, \
44 .open = mac80211_open_file_generic, \
45 .llseek = generic_file_llseek, \
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 struct sta_info *sta = file->private_data;
81 return mac80211_format_buffer(userbuf, count, ppos, "%u\n",
82 skb_queue_len(&sta->ps_tx_buf));
83 }
84 STA_OPS(num_ps_buf_frames);
85
86 static ssize_t sta_inactive_ms_read(struct file *file, char __user *userbuf,
87 size_t count, loff_t *ppos)
88 {
89 struct sta_info *sta = file->private_data;
90 return mac80211_format_buffer(userbuf, count, ppos, "%d\n",
91 jiffies_to_msecs(jiffies - sta->last_rx));
92 }
93 STA_OPS(inactive_ms);
94
95 static 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 ",
103 le16_to_cpu(sta->last_seq_ctrl[i]));
104 p += scnprintf(p, sizeof(buf)+buf-p, "\n");
105 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
106 }
107 STA_OPS(last_seq_ctrl);
108
109 static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf,
110 size_t count, loff_t *ppos)
111 {
112 char buf[71 + STA_TID_NUM * 40], *p = buf;
113 int i;
114 struct sta_info *sta = file->private_data;
115 struct tid_ampdu_rx *tid_rx;
116 struct tid_ampdu_tx *tid_tx;
117
118 rcu_read_lock();
119
120 p += scnprintf(p, sizeof(buf) + buf - p, "next dialog_token: %#02x\n",
121 sta->ampdu_mlme.dialog_token_allocator + 1);
122 p += scnprintf(p, sizeof(buf) + buf - p,
123 "TID\t\tRX active\tDTKN\tSSN\t\tTX\tDTKN\tpending\n");
124
125 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);
131 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
132 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);
139 p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d",
140 tid_tx ? skb_queue_len(&tid_tx->pending) : 0);
141 p += scnprintf(p, sizeof(buf) + buf - p, "\n");
142 }
143 rcu_read_unlock();
144
145 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
146 }
147
148 static 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)
192 ret = ieee80211_start_tx_ba_session(&sta->sta, tid, 5000);
193 else
194 ret = ieee80211_stop_tx_ba_session(&sta->sta, tid);
195 } else {
196 __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT,
197 3, true);
198 ret = 0;
199 }
200
201 return ret ?: count;
202 }
203 STA_OPS_RW(agg_status);
204
205 static ssize_t sta_ht_capa_read(struct file *file, char __user *userbuf,
206 size_t count, loff_t *ppos)
207 {
208 #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)
213 char buf[512], *p = buf;
214 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) {
221 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.4x\n", htc->cap);
222
223 PRINT_HT_CAP((htc->cap & BIT(0)), "RX LDPC");
224 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
263 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:");
266
267 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]);
270 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
279 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 }
285 STA_OPS(ht_capa);
286
287 #define DEBUGFS_ADD(name) \
288 debugfs_create_file(#name, 0400, \
289 sta->debugfs.dir, sta, &sta_ ##name## _ops);
290
291 #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);
298
299 void ieee80211_sta_debugfs_add(struct sta_info *sta)
300 {
301 struct dentry *stations_dir = sta->sdata->debugfs.subdir_stations;
302 u8 mac[3*ETH_ALEN];
303
304 sta->debugfs.add_has_run = true;
305
306 if (!stations_dir)
307 return;
308
309 snprintf(mac, sizeof(mac), "%pM", sta->sta.addr);
310
311 /*
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 */
320 sta->debugfs.dir = debugfs_create_dir(mac, stations_dir);
321 if (!sta->debugfs.dir)
322 return;
323
324 DEBUGFS_ADD(flags);
325 DEBUGFS_ADD(num_ps_buf_frames);
326 DEBUGFS_ADD(inactive_ms);
327 DEBUGFS_ADD(last_seq_ctrl);
328 DEBUGFS_ADD(agg_status);
329 DEBUGFS_ADD(dev);
330 DEBUGFS_ADD(last_signal);
331 DEBUGFS_ADD(ht_capa);
332
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);
345 }
346
347 void ieee80211_sta_debugfs_remove(struct sta_info *sta)
348 {
349 debugfs_remove_recursive(sta->debugfs.dir);
350 sta->debugfs.dir = NULL;
351 }
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