projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
net/wireless: use generic_file_llseek in debugfs
[deliverable/linux.git] / net / mac80211 / debugfs_sta.c
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 .llseek = generic_file_llseek, \
40 }
41
42 #define STA_OPS_RW(name) \
43 static const struct file_operations sta_ ##name## _ops = { \
44 .read = sta_##name##_read, \
45 .write = sta_##name##_write, \
46 .open = mac80211_open_file_generic, \
47 .llseek = generic_file_llseek, \
48 }
49
50 #define STA_FILE(name, field, format) \
51 STA_READ_##format(name, field) \
52 STA_OPS(name)
53
54 STA_FILE(aid, sta.aid, D);
55 STA_FILE(dev, sdata->name, S);
56 STA_FILE(last_signal, last_signal, D);
57
58 static ssize_t sta_flags_read(struct file *file, char __user *userbuf,
59 size_t count, loff_t *ppos)
60 {
61 char buf[100];
62 struct sta_info *sta = file->private_data;
63 u32 staflags = get_sta_flags(sta);
64 int res = scnprintf(buf, sizeof(buf), "%s%s%s%s%s%s%s%s%s",
65 staflags & WLAN_STA_AUTH ? "AUTH\n" : "",
66 staflags & WLAN_STA_ASSOC ? "ASSOC\n" : "",
67 staflags & WLAN_STA_PS_STA ? "PS (sta)\n" : "",
68 staflags & WLAN_STA_PS_DRIVER ? "PS (driver)\n" : "",
69 staflags & WLAN_STA_AUTHORIZED ? "AUTHORIZED\n" : "",
70 staflags & WLAN_STA_SHORT_PREAMBLE ? "SHORT PREAMBLE\n" : "",
71 staflags & WLAN_STA_WME ? "WME\n" : "",
72 staflags & WLAN_STA_WDS ? "WDS\n" : "",
73 staflags & WLAN_STA_MFP ? "MFP\n" : "");
74 return simple_read_from_buffer(userbuf, count, ppos, buf, res);
75 }
76 STA_OPS(flags);
77
78 static ssize_t sta_num_ps_buf_frames_read(struct file *file,
79 char __user *userbuf,
80 size_t count, loff_t *ppos)
81 {
82 char buf[20];
83 struct sta_info *sta = file->private_data;
84 int res = scnprintf(buf, sizeof(buf), "%u\n",
85 skb_queue_len(&sta->ps_tx_buf));
86 return simple_read_from_buffer(userbuf, count, ppos, buf, res);
87 }
88 STA_OPS(num_ps_buf_frames);
89
90 static ssize_t sta_inactive_ms_read(struct file *file, char __user *userbuf,
91 size_t count, loff_t *ppos)
92 {
93 char buf[20];
94 struct sta_info *sta = file->private_data;
95 int res = scnprintf(buf, sizeof(buf), "%d\n",
96 jiffies_to_msecs(jiffies - sta->last_rx));
97 return simple_read_from_buffer(userbuf, count, ppos, buf, res);
98 }
99 STA_OPS(inactive_ms);
100
101 static ssize_t sta_last_seq_ctrl_read(struct file *file, char __user *userbuf,
102 size_t count, loff_t *ppos)
103 {
104 char buf[15*NUM_RX_DATA_QUEUES], *p = buf;
105 int i;
106 struct sta_info *sta = file->private_data;
107 for (i = 0; i < NUM_RX_DATA_QUEUES; i++)
108 p += scnprintf(p, sizeof(buf)+buf-p, "%x ",
109 le16_to_cpu(sta->last_seq_ctrl[i]));
110 p += scnprintf(p, sizeof(buf)+buf-p, "\n");
111 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
112 }
113 STA_OPS(last_seq_ctrl);
114
115 static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf,
116 size_t count, loff_t *ppos)
117 {
118 char buf[71 + STA_TID_NUM * 40], *p = buf;
119 int i;
120 struct sta_info *sta = file->private_data;
121
122 spin_lock_bh(&sta->lock);
123 p += scnprintf(p, sizeof(buf) + buf - p, "next dialog_token: %#02x\n",
124 sta->ampdu_mlme.dialog_token_allocator + 1);
125 p += scnprintf(p, sizeof(buf) + buf - p,
126 "TID\t\tRX active\tDTKN\tSSN\t\tTX\tDTKN\tpending\n");
127 for (i = 0; i < STA_TID_NUM; i++) {
128 p += scnprintf(p, sizeof(buf) + buf - p, "%02d", i);
129 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x",
130 !!sta->ampdu_mlme.tid_rx[i]);
131 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
132 sta->ampdu_mlme.tid_rx[i] ?
133 sta->ampdu_mlme.tid_rx[i]->dialog_token : 0);
134 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x",
135 sta->ampdu_mlme.tid_rx[i] ?
136 sta->ampdu_mlme.tid_rx[i]->ssn : 0);
137
138 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x",
139 !!sta->ampdu_mlme.tid_tx[i]);
140 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
141 sta->ampdu_mlme.tid_tx[i] ?
142 sta->ampdu_mlme.tid_tx[i]->dialog_token : 0);
143 p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d",
144 sta->ampdu_mlme.tid_tx[i] ?
145 skb_queue_len(&sta->ampdu_mlme.tid_tx[i]->pending) : 0);
146 p += scnprintf(p, sizeof(buf) + buf - p, "\n");
147 }
148 spin_unlock_bh(&sta->lock);
149
150 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
151 }
152
153 static ssize_t sta_agg_status_write(struct file *file, const char __user *userbuf,
154 size_t count, loff_t *ppos)
155 {
156 char _buf[12], *buf = _buf;
157 struct sta_info *sta = file->private_data;
158 bool start, tx;
159 unsigned long tid;
160 int ret;
161
162 if (count > sizeof(_buf))
163 return -EINVAL;
164
165 if (copy_from_user(buf, userbuf, count))
166 return -EFAULT;
167
168 buf[sizeof(_buf) - 1] = '\0';
169
170 if (strncmp(buf, "tx ", 3) == 0) {
171 buf += 3;
172 tx = true;
173 } else if (strncmp(buf, "rx ", 3) == 0) {
174 buf += 3;
175 tx = false;
176 } else
177 return -EINVAL;
178
179 if (strncmp(buf, "start ", 6) == 0) {
180 buf += 6;
181 start = true;
182 if (!tx)
183 return -EINVAL;
184 } else if (strncmp(buf, "stop ", 5) == 0) {
185 buf += 5;
186 start = false;
187 } else
188 return -EINVAL;
189
190 tid = simple_strtoul(buf, NULL, 0);
191
192 if (tid >= STA_TID_NUM)
193 return -EINVAL;
194
195 if (tx) {
196 if (start)
197 ret = ieee80211_start_tx_ba_session(&sta->sta, tid);
198 else
199 ret = ieee80211_stop_tx_ba_session(&sta->sta, tid);
200 } else {
201 __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT, 3);
202 ret = 0;
203 }
204
205 return ret ?: count;
206 }
207 STA_OPS_RW(agg_status);
208
209 static ssize_t sta_ht_capa_read(struct file *file, char __user *userbuf,
210 size_t count, loff_t *ppos)
211 {
212 #define PRINT_HT_CAP(_cond, _str) \
213 do { \
214 if (_cond) \
215 p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \
216 } while (0)
217 char buf[512], *p = buf;
218 int i;
219 struct sta_info *sta = file->private_data;
220 struct ieee80211_sta_ht_cap *htc = &sta->sta.ht_cap;
221
222 p += scnprintf(p, sizeof(buf) + buf - p, "ht %ssupported\n",
223 htc->ht_supported ? "" : "not ");
224 if (htc->ht_supported) {
225 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.4x\n", htc->cap);
226
227 PRINT_HT_CAP((htc->cap & BIT(0)), "RX LDPC");
228 PRINT_HT_CAP((htc->cap & BIT(1)), "HT20/HT40");
229 PRINT_HT_CAP(!(htc->cap & BIT(1)), "HT20");
230
231 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 0, "Static SM Power Save");
232 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 1, "Dynamic SM Power Save");
233 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 3, "SM Power Save disabled");
234
235 PRINT_HT_CAP((htc->cap & BIT(4)), "RX Greenfield");
236 PRINT_HT_CAP((htc->cap & BIT(5)), "RX HT20 SGI");
237 PRINT_HT_CAP((htc->cap & BIT(6)), "RX HT40 SGI");
238 PRINT_HT_CAP((htc->cap & BIT(7)), "TX STBC");
239
240 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 0, "No RX STBC");
241 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 1, "RX STBC 1-stream");
242 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 2, "RX STBC 2-streams");
243 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 3, "RX STBC 3-streams");
244
245 PRINT_HT_CAP((htc->cap & BIT(10)), "HT Delayed Block Ack");
246
247 PRINT_HT_CAP((htc->cap & BIT(11)), "Max AMSDU length: "
248 "3839 bytes");
249 PRINT_HT_CAP(!(htc->cap & BIT(11)), "Max AMSDU length: "
250 "7935 bytes");
251
252 /*
253 * For beacons and probe response this would mean the BSS
254 * does or does not allow the usage of DSSS/CCK HT40.
255 * Otherwise it means the STA does or does not use
256 * DSSS/CCK HT40.
257 */
258 PRINT_HT_CAP((htc->cap & BIT(12)), "DSSS/CCK HT40");
259 PRINT_HT_CAP(!(htc->cap & BIT(12)), "No DSSS/CCK HT40");
260
261 /* BIT(13) is reserved */
262
263 PRINT_HT_CAP((htc->cap & BIT(14)), "40 MHz Intolerant");
264
265 PRINT_HT_CAP((htc->cap & BIT(15)), "L-SIG TXOP protection");
266
267 p += scnprintf(p, sizeof(buf)+buf-p, "ampdu factor/density: %d/%d\n",
268 htc->ampdu_factor, htc->ampdu_density);
269 p += scnprintf(p, sizeof(buf)+buf-p, "MCS mask:");
270
271 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
272 p += scnprintf(p, sizeof(buf)+buf-p, " %.2x",
273 htc->mcs.rx_mask[i]);
274 p += scnprintf(p, sizeof(buf)+buf-p, "\n");
275
276 /* If not set this is meaningless */
277 if (le16_to_cpu(htc->mcs.rx_highest)) {
278 p += scnprintf(p, sizeof(buf)+buf-p,
279 "MCS rx highest: %d Mbps\n",
280 le16_to_cpu(htc->mcs.rx_highest));
281 }
282
283 p += scnprintf(p, sizeof(buf)+buf-p, "MCS tx params: %x\n",
284 htc->mcs.tx_params);
285 }
286
287 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
288 }
289 STA_OPS(ht_capa);
290
291 #define DEBUGFS_ADD(name) \
292 debugfs_create_file(#name, 0400, \
293 sta->debugfs.dir, sta, &sta_ ##name## _ops);
294
295 #define DEBUGFS_ADD_COUNTER(name, field) \
296 if (sizeof(sta->field) == sizeof(u32)) \
297 debugfs_create_u32(#name, 0400, sta->debugfs.dir, \
298 (u32 *) &sta->field); \
299 else \
300 debugfs_create_u64(#name, 0400, sta->debugfs.dir, \
301 (u64 *) &sta->field);
302
303 void ieee80211_sta_debugfs_add(struct sta_info *sta)
304 {
305 struct dentry *stations_dir = sta->local->debugfs.stations;
306 u8 mac[3*ETH_ALEN];
307
308 sta->debugfs.add_has_run = true;
309
310 if (!stations_dir)
311 return;
312
313 snprintf(mac, sizeof(mac), "%pM", sta->sta.addr);
314
315 /*
316 * This might fail due to a race condition:
317 * When mac80211 unlinks a station, the debugfs entries
318 * remain, but it is already possible to link a new
319 * station with the same address which triggers adding
320 * it to debugfs; therefore, if the old station isn't
321 * destroyed quickly enough the old station's debugfs
322 * dir might still be around.
323 */
324 sta->debugfs.dir = debugfs_create_dir(mac, stations_dir);
325 if (!sta->debugfs.dir)
326 return;
327
328 DEBUGFS_ADD(flags);
329 DEBUGFS_ADD(num_ps_buf_frames);
330 DEBUGFS_ADD(inactive_ms);
331 DEBUGFS_ADD(last_seq_ctrl);
332 DEBUGFS_ADD(agg_status);
333 DEBUGFS_ADD(dev);
334 DEBUGFS_ADD(last_signal);
335 DEBUGFS_ADD(ht_capa);
336
337 DEBUGFS_ADD_COUNTER(rx_packets, rx_packets);
338 DEBUGFS_ADD_COUNTER(tx_packets, tx_packets);
339 DEBUGFS_ADD_COUNTER(rx_bytes, rx_bytes);
340 DEBUGFS_ADD_COUNTER(tx_bytes, tx_bytes);
341 DEBUGFS_ADD_COUNTER(rx_duplicates, num_duplicates);
342 DEBUGFS_ADD_COUNTER(rx_fragments, rx_fragments);
343 DEBUGFS_ADD_COUNTER(rx_dropped, rx_dropped);
344 DEBUGFS_ADD_COUNTER(tx_fragments, tx_fragments);
345 DEBUGFS_ADD_COUNTER(tx_filtered, tx_filtered_count);
346 DEBUGFS_ADD_COUNTER(tx_retry_failed, tx_retry_failed);
347 DEBUGFS_ADD_COUNTER(tx_retry_count, tx_retry_count);
348 DEBUGFS_ADD_COUNTER(wep_weak_iv_count, wep_weak_iv_count);
349 }
350
351 void ieee80211_sta_debugfs_remove(struct sta_info *sta)
352 {
353 debugfs_remove_recursive(sta->debugfs.dir);
354 sta->debugfs.dir = NULL;
355 }
Linux kernel - Deliverables
This page took 0.051434 seconds and 5 git commands to generate.