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drm: Fix authentication kernel crash
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / mac80211 / debugfs_sta.c
blob3110cbdc501b83d3650c978d26c51c2ef7c47568
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[121];
60 struct sta_info *sta = file->private_data;
61
62 #define TEST(flg) \
63 test_sta_flag(sta, WLAN_STA_##flg) ? #flg "\n" : ""
64
65 int res = scnprintf(buf, sizeof(buf),
66 "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
67 TEST(AUTH), TEST(ASSOC), TEST(PS_STA),
68 TEST(PS_DRIVER), TEST(AUTHORIZED),
69 TEST(SHORT_PREAMBLE), TEST(ASSOC_AP),
70 TEST(WME), TEST(WDS), TEST(CLEAR_PS_FILT),
71 TEST(MFP), TEST(BLOCK_BA), TEST(PSPOLL),
72 TEST(UAPSD), TEST(SP), TEST(TDLS_PEER),
73 TEST(TDLS_PEER_AUTH));
74 #undef TEST
75 return simple_read_from_buffer(userbuf, count, ppos, buf, res);
76 }
77 STA_OPS(flags);
78
79 static ssize_t sta_num_ps_buf_frames_read(struct file *file,
80 char __user *userbuf,
81 size_t count, loff_t *ppos)
82 {
83 struct sta_info *sta = file->private_data;
84 char buf[17*IEEE80211_NUM_ACS], *p = buf;
85 int ac;
86
87 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
88 p += scnprintf(p, sizeof(buf)+buf-p, "AC%d: %d\n", ac,
89 skb_queue_len(&sta->ps_tx_buf[ac]) +
90 skb_queue_len(&sta->tx_filtered[ac]));
91 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
92 }
93 STA_OPS(num_ps_buf_frames);
94
95 static ssize_t sta_inactive_ms_read(struct file *file, char __user *userbuf,
96 size_t count, loff_t *ppos)
97 {
98 struct sta_info *sta = file->private_data;
99 return mac80211_format_buffer(userbuf, count, ppos, "%d\n",
100 jiffies_to_msecs(jiffies - sta->last_rx));
101 }
102 STA_OPS(inactive_ms);
103
104
105 static ssize_t sta_connected_time_read(struct file *file, char __user *userbuf,
106 size_t count, loff_t *ppos)
107 {
108 struct sta_info *sta = file->private_data;
109 struct timespec uptime;
110 struct tm result;
111 long connected_time_secs;
112 char buf[100];
113 int res;
114 do_posix_clock_monotonic_gettime(&uptime);
115 connected_time_secs = uptime.tv_sec - sta->last_connected;
116 time_to_tm(connected_time_secs, 0, &result);
117 result.tm_year -= 70;
118 result.tm_mday -= 1;
119 res = scnprintf(buf, sizeof(buf),
120 "years - %ld\nmonths - %d\ndays - %d\nclock - %d:%d:%d\n\n",
121 result.tm_year, result.tm_mon, result.tm_mday,
122 result.tm_hour, result.tm_min, result.tm_sec);
123 return simple_read_from_buffer(userbuf, count, ppos, buf, res);
124 }
125 STA_OPS(connected_time);
126
127
128
129 static ssize_t sta_last_seq_ctrl_read(struct file *file, char __user *userbuf,
130 size_t count, loff_t *ppos)
131 {
132 char buf[15*NUM_RX_DATA_QUEUES], *p = buf;
133 int i;
134 struct sta_info *sta = file->private_data;
135 for (i = 0; i < NUM_RX_DATA_QUEUES; i++)
136 p += scnprintf(p, sizeof(buf)+buf-p, "%x ",
137 le16_to_cpu(sta->last_seq_ctrl[i]));
138 p += scnprintf(p, sizeof(buf)+buf-p, "\n");
139 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
140 }
141 STA_OPS(last_seq_ctrl);
142
143 static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf,
144 size_t count, loff_t *ppos)
145 {
146 char buf[71 + STA_TID_NUM * 40], *p = buf;
147 int i;
148 struct sta_info *sta = file->private_data;
149 struct tid_ampdu_rx *tid_rx;
150 struct tid_ampdu_tx *tid_tx;
151
152 rcu_read_lock();
153
154 p += scnprintf(p, sizeof(buf) + buf - p, "next dialog_token: %#02x\n",
155 sta->ampdu_mlme.dialog_token_allocator + 1);
156 p += scnprintf(p, sizeof(buf) + buf - p,
157 "TID\t\tRX active\tDTKN\tSSN\t\tTX\tDTKN\tpending\n");
158
159 for (i = 0; i < STA_TID_NUM; i++) {
160 tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[i]);
161 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[i]);
162
163 p += scnprintf(p, sizeof(buf) + buf - p, "%02d", i);
164 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_rx);
165 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
166 tid_rx ? tid_rx->dialog_token : 0);
167 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x",
168 tid_rx ? tid_rx->ssn : 0);
169
170 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_tx);
171 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
172 tid_tx ? tid_tx->dialog_token : 0);
173 p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d",
174 tid_tx ? skb_queue_len(&tid_tx->pending) : 0);
175 p += scnprintf(p, sizeof(buf) + buf - p, "\n");
176 }
177 rcu_read_unlock();
178
179 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
180 }
181
182 static ssize_t sta_agg_status_write(struct file *file, const char __user *userbuf,
183 size_t count, loff_t *ppos)
184 {
185 char _buf[12], *buf = _buf;
186 struct sta_info *sta = file->private_data;
187 bool start, tx;
188 unsigned long tid;
189 int ret;
190
191 if (count > sizeof(_buf))
192 return -EINVAL;
193
194 if (copy_from_user(buf, userbuf, count))
195 return -EFAULT;
196
197 buf[sizeof(_buf) - 1] = '\0';
198
199 if (strncmp(buf, "tx ", 3) == 0) {
200 buf += 3;
201 tx = true;
202 } else if (strncmp(buf, "rx ", 3) == 0) {
203 buf += 3;
204 tx = false;
205 } else
206 return -EINVAL;
207
208 if (strncmp(buf, "start ", 6) == 0) {
209 buf += 6;
210 start = true;
211 if (!tx)
212 return -EINVAL;
213 } else if (strncmp(buf, "stop ", 5) == 0) {
214 buf += 5;
215 start = false;
216 } else
217 return -EINVAL;
218
219 tid = simple_strtoul(buf, NULL, 0);
220
221 if (tid >= STA_TID_NUM)
222 return -EINVAL;
223
224 if (tx) {
225 if (start)
226 ret = ieee80211_start_tx_ba_session(&sta->sta, tid, 5000);
227 else
228 ret = ieee80211_stop_tx_ba_session(&sta->sta, tid);
229 } else {
230 __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT,
231 3, true);
232 ret = 0;
233 }
234
235 return ret ?: count;
236 }
237 STA_OPS_RW(agg_status);
238
239 static ssize_t sta_ht_capa_read(struct file *file, char __user *userbuf,
240 size_t count, loff_t *ppos)
241 {
242 #define PRINT_HT_CAP(_cond, _str) \
243 do { \
244 if (_cond) \
245 p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \
246 } while (0)
247 char buf[512], *p = buf;
248 int i;
249 struct sta_info *sta = file->private_data;
250 struct ieee80211_sta_ht_cap *htc = &sta->sta.ht_cap;
251
252 p += scnprintf(p, sizeof(buf) + buf - p, "ht %ssupported\n",
253 htc->ht_supported ? "" : "not ");
254 if (htc->ht_supported) {
255 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.4x\n", htc->cap);
256
257 PRINT_HT_CAP((htc->cap & BIT(0)), "RX LDPC");
258 PRINT_HT_CAP((htc->cap & BIT(1)), "HT20/HT40");
259 PRINT_HT_CAP(!(htc->cap & BIT(1)), "HT20");
260
261 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 0, "Static SM Power Save");
262 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 1, "Dynamic SM Power Save");
263 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 3, "SM Power Save disabled");
264
265 PRINT_HT_CAP((htc->cap & BIT(4)), "RX Greenfield");
266 PRINT_HT_CAP((htc->cap & BIT(5)), "RX HT20 SGI");
267 PRINT_HT_CAP((htc->cap & BIT(6)), "RX HT40 SGI");
268 PRINT_HT_CAP((htc->cap & BIT(7)), "TX STBC");
269
270 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 0, "No RX STBC");
271 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 1, "RX STBC 1-stream");
272 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 2, "RX STBC 2-streams");
273 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 3, "RX STBC 3-streams");
274
275 PRINT_HT_CAP((htc->cap & BIT(10)), "HT Delayed Block Ack");
276
277 PRINT_HT_CAP(!(htc->cap & BIT(11)), "Max AMSDU length: "
278 "3839 bytes");
279 PRINT_HT_CAP((htc->cap & BIT(11)), "Max AMSDU length: "
280 "7935 bytes");
281
282 /*
283 * For beacons and probe response this would mean the BSS
284 * does or does not allow the usage of DSSS/CCK HT40.
285 * Otherwise it means the STA does or does not use
286 * DSSS/CCK HT40.
287 */
288 PRINT_HT_CAP((htc->cap & BIT(12)), "DSSS/CCK HT40");
289 PRINT_HT_CAP(!(htc->cap & BIT(12)), "No DSSS/CCK HT40");
290
291 /* BIT(13) is reserved */
292
293 PRINT_HT_CAP((htc->cap & BIT(14)), "40 MHz Intolerant");
294
295 PRINT_HT_CAP((htc->cap & BIT(15)), "L-SIG TXOP protection");
296
297 p += scnprintf(p, sizeof(buf)+buf-p, "ampdu factor/density: %d/%d\n",
298 htc->ampdu_factor, htc->ampdu_density);
299 p += scnprintf(p, sizeof(buf)+buf-p, "MCS mask:");
300
301 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
302 p += scnprintf(p, sizeof(buf)+buf-p, " %.2x",
303 htc->mcs.rx_mask[i]);
304 p += scnprintf(p, sizeof(buf)+buf-p, "\n");
305
306 /* If not set this is meaningless */
307 if (le16_to_cpu(htc->mcs.rx_highest)) {
308 p += scnprintf(p, sizeof(buf)+buf-p,
309 "MCS rx highest: %d Mbps\n",
310 le16_to_cpu(htc->mcs.rx_highest));
311 }
312
313 p += scnprintf(p, sizeof(buf)+buf-p, "MCS tx params: %x\n",
314 htc->mcs.tx_params);
315 }
316
317 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
318 }
319 STA_OPS(ht_capa);
320
321 #define DEBUGFS_ADD(name) \
322 debugfs_create_file(#name, 0400, \
323 sta->debugfs.dir, sta, &sta_ ##name## _ops);
324
325 #define DEBUGFS_ADD_COUNTER(name, field) \
326 if (sizeof(sta->field) == sizeof(u32)) \
327 debugfs_create_u32(#name, 0400, sta->debugfs.dir, \
328 (u32 *) &sta->field); \
329 else \
330 debugfs_create_u64(#name, 0400, sta->debugfs.dir, \
331 (u64 *) &sta->field);
332
333 void ieee80211_sta_debugfs_add(struct sta_info *sta)
334 {
335 struct dentry *stations_dir = sta->sdata->debugfs.subdir_stations;
336 u8 mac[3*ETH_ALEN];
337
338 sta->debugfs.add_has_run = true;
339
340 if (!stations_dir)
341 return;
342
343 snprintf(mac, sizeof(mac), "%pM", sta->sta.addr);
344
345 /*
346 * This might fail due to a race condition:
347 * When mac80211 unlinks a station, the debugfs entries
348 * remain, but it is already possible to link a new
349 * station with the same address which triggers adding
350 * it to debugfs; therefore, if the old station isn't
351 * destroyed quickly enough the old station's debugfs
352 * dir might still be around.
353 */
354 sta->debugfs.dir = debugfs_create_dir(mac, stations_dir);
355 if (!sta->debugfs.dir)
356 return;
357
358 DEBUGFS_ADD(flags);
359 DEBUGFS_ADD(num_ps_buf_frames);
360 DEBUGFS_ADD(inactive_ms);
361 DEBUGFS_ADD(connected_time);
362 DEBUGFS_ADD(last_seq_ctrl);
363 DEBUGFS_ADD(agg_status);
364 DEBUGFS_ADD(dev);
365 DEBUGFS_ADD(last_signal);
366 DEBUGFS_ADD(ht_capa);
367
368 DEBUGFS_ADD_COUNTER(rx_packets, rx_packets);
369 DEBUGFS_ADD_COUNTER(tx_packets, tx_packets);
370 DEBUGFS_ADD_COUNTER(rx_bytes, rx_bytes);
371 DEBUGFS_ADD_COUNTER(tx_bytes, tx_bytes);
372 DEBUGFS_ADD_COUNTER(rx_duplicates, num_duplicates);
373 DEBUGFS_ADD_COUNTER(rx_fragments, rx_fragments);
374 DEBUGFS_ADD_COUNTER(rx_dropped, rx_dropped);
375 DEBUGFS_ADD_COUNTER(tx_fragments, tx_fragments);
376 DEBUGFS_ADD_COUNTER(tx_filtered, tx_filtered_count);
377 DEBUGFS_ADD_COUNTER(tx_retry_failed, tx_retry_failed);
378 DEBUGFS_ADD_COUNTER(tx_retry_count, tx_retry_count);
379 DEBUGFS_ADD_COUNTER(wep_weak_iv_count, wep_weak_iv_count);
380 }
381
382 void ieee80211_sta_debugfs_remove(struct sta_info *sta)
383 {
384 debugfs_remove_recursive(sta->debugfs.dir);
385 sta->debugfs.dir = NULL;
386 }
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