ipv4: flush route cache after change accept_local
[linux-2.6.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, 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
96 static ssize_t sta_connected_time_read(struct file *file, char __user *userbuf,
97                                         size_t count, loff_t *ppos)
98 {
99         struct sta_info *sta = file->private_data;
100         struct timespec uptime;
101         struct tm result;
102         long connected_time_secs;
103         char buf[100];
104         int res;
105         do_posix_clock_monotonic_gettime(&uptime);
106         connected_time_secs = uptime.tv_sec - sta->last_connected;
107         time_to_tm(connected_time_secs, 0, &result);
108         result.tm_year -= 70;
109         result.tm_mday -= 1;
110         res = scnprintf(buf, sizeof(buf),
111                 "years  - %ld\nmonths - %d\ndays   - %d\nclock  - %d:%d:%d\n\n",
112                         result.tm_year, result.tm_mon, result.tm_mday,
113                         result.tm_hour, result.tm_min, result.tm_sec);
114         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
115 }
116 STA_OPS(connected_time);
117
118
119
120 static ssize_t sta_last_seq_ctrl_read(struct file *file, char __user *userbuf,
121                                       size_t count, loff_t *ppos)
122 {
123         char buf[15*NUM_RX_DATA_QUEUES], *p = buf;
124         int i;
125         struct sta_info *sta = file->private_data;
126         for (i = 0; i < NUM_RX_DATA_QUEUES; i++)
127                 p += scnprintf(p, sizeof(buf)+buf-p, "%x ",
128                                le16_to_cpu(sta->last_seq_ctrl[i]));
129         p += scnprintf(p, sizeof(buf)+buf-p, "\n");
130         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
131 }
132 STA_OPS(last_seq_ctrl);
133
134 static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf,
135                                         size_t count, loff_t *ppos)
136 {
137         char buf[71 + STA_TID_NUM * 40], *p = buf;
138         int i;
139         struct sta_info *sta = file->private_data;
140         struct tid_ampdu_rx *tid_rx;
141         struct tid_ampdu_tx *tid_tx;
142
143         rcu_read_lock();
144
145         p += scnprintf(p, sizeof(buf) + buf - p, "next dialog_token: %#02x\n",
146                         sta->ampdu_mlme.dialog_token_allocator + 1);
147         p += scnprintf(p, sizeof(buf) + buf - p,
148                        "TID\t\tRX active\tDTKN\tSSN\t\tTX\tDTKN\tpending\n");
149
150         for (i = 0; i < STA_TID_NUM; i++) {
151                 tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[i]);
152                 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[i]);
153
154                 p += scnprintf(p, sizeof(buf) + buf - p, "%02d", i);
155                 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_rx);
156                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
157                                 tid_rx ? tid_rx->dialog_token : 0);
158                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x",
159                                 tid_rx ? tid_rx->ssn : 0);
160
161                 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_tx);
162                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
163                                 tid_tx ? tid_tx->dialog_token : 0);
164                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d",
165                                 tid_tx ? skb_queue_len(&tid_tx->pending) : 0);
166                 p += scnprintf(p, sizeof(buf) + buf - p, "\n");
167         }
168         rcu_read_unlock();
169
170         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
171 }
172
173 static ssize_t sta_agg_status_write(struct file *file, const char __user *userbuf,
174                                     size_t count, loff_t *ppos)
175 {
176         char _buf[12], *buf = _buf;
177         struct sta_info *sta = file->private_data;
178         bool start, tx;
179         unsigned long tid;
180         int ret;
181
182         if (count > sizeof(_buf))
183                 return -EINVAL;
184
185         if (copy_from_user(buf, userbuf, count))
186                 return -EFAULT;
187
188         buf[sizeof(_buf) - 1] = '\0';
189
190         if (strncmp(buf, "tx ", 3) == 0) {
191                 buf += 3;
192                 tx = true;
193         } else if (strncmp(buf, "rx ", 3) == 0) {
194                 buf += 3;
195                 tx = false;
196         } else
197                 return -EINVAL;
198
199         if (strncmp(buf, "start ", 6) == 0) {
200                 buf += 6;
201                 start = true;
202                 if (!tx)
203                         return -EINVAL;
204         } else if (strncmp(buf, "stop ", 5) == 0) {
205                 buf += 5;
206                 start = false;
207         } else
208                 return -EINVAL;
209
210         tid = simple_strtoul(buf, NULL, 0);
211
212         if (tid >= STA_TID_NUM)
213                 return -EINVAL;
214
215         if (tx) {
216                 if (start)
217                         ret = ieee80211_start_tx_ba_session(&sta->sta, tid, 5000);
218                 else
219                         ret = ieee80211_stop_tx_ba_session(&sta->sta, tid);
220         } else {
221                 __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT,
222                                                3, true);
223                 ret = 0;
224         }
225
226         return ret ?: count;
227 }
228 STA_OPS_RW(agg_status);
229
230 static ssize_t sta_ht_capa_read(struct file *file, char __user *userbuf,
231                                 size_t count, loff_t *ppos)
232 {
233 #define PRINT_HT_CAP(_cond, _str) \
234         do { \
235         if (_cond) \
236                         p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \
237         } while (0)
238         char buf[512], *p = buf;
239         int i;
240         struct sta_info *sta = file->private_data;
241         struct ieee80211_sta_ht_cap *htc = &sta->sta.ht_cap;
242
243         p += scnprintf(p, sizeof(buf) + buf - p, "ht %ssupported\n",
244                         htc->ht_supported ? "" : "not ");
245         if (htc->ht_supported) {
246                 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.4x\n", htc->cap);
247
248                 PRINT_HT_CAP((htc->cap & BIT(0)), "RX LDPC");
249                 PRINT_HT_CAP((htc->cap & BIT(1)), "HT20/HT40");
250                 PRINT_HT_CAP(!(htc->cap & BIT(1)), "HT20");
251
252                 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 0, "Static SM Power Save");
253                 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 1, "Dynamic SM Power Save");
254                 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 3, "SM Power Save disabled");
255
256                 PRINT_HT_CAP((htc->cap & BIT(4)), "RX Greenfield");
257                 PRINT_HT_CAP((htc->cap & BIT(5)), "RX HT20 SGI");
258                 PRINT_HT_CAP((htc->cap & BIT(6)), "RX HT40 SGI");
259                 PRINT_HT_CAP((htc->cap & BIT(7)), "TX STBC");
260
261                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 0, "No RX STBC");
262                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 1, "RX STBC 1-stream");
263                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 2, "RX STBC 2-streams");
264                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 3, "RX STBC 3-streams");
265
266                 PRINT_HT_CAP((htc->cap & BIT(10)), "HT Delayed Block Ack");
267
268                 PRINT_HT_CAP((htc->cap & BIT(11)), "Max AMSDU length: "
269                              "3839 bytes");
270                 PRINT_HT_CAP(!(htc->cap & BIT(11)), "Max AMSDU length: "
271                              "7935 bytes");
272
273                 /*
274                  * For beacons and probe response this would mean the BSS
275                  * does or does not allow the usage of DSSS/CCK HT40.
276                  * Otherwise it means the STA does or does not use
277                  * DSSS/CCK HT40.
278                  */
279                 PRINT_HT_CAP((htc->cap & BIT(12)), "DSSS/CCK HT40");
280                 PRINT_HT_CAP(!(htc->cap & BIT(12)), "No DSSS/CCK HT40");
281
282                 /* BIT(13) is reserved */
283
284                 PRINT_HT_CAP((htc->cap & BIT(14)), "40 MHz Intolerant");
285
286                 PRINT_HT_CAP((htc->cap & BIT(15)), "L-SIG TXOP protection");
287
288                 p += scnprintf(p, sizeof(buf)+buf-p, "ampdu factor/density: %d/%d\n",
289                                 htc->ampdu_factor, htc->ampdu_density);
290                 p += scnprintf(p, sizeof(buf)+buf-p, "MCS mask:");
291
292                 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
293                         p += scnprintf(p, sizeof(buf)+buf-p, " %.2x",
294                                         htc->mcs.rx_mask[i]);
295                 p += scnprintf(p, sizeof(buf)+buf-p, "\n");
296
297                 /* If not set this is meaningless */
298                 if (le16_to_cpu(htc->mcs.rx_highest)) {
299                         p += scnprintf(p, sizeof(buf)+buf-p,
300                                        "MCS rx highest: %d Mbps\n",
301                                        le16_to_cpu(htc->mcs.rx_highest));
302                 }
303
304                 p += scnprintf(p, sizeof(buf)+buf-p, "MCS tx params: %x\n",
305                                 htc->mcs.tx_params);
306         }
307
308         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
309 }
310 STA_OPS(ht_capa);
311
312 #define DEBUGFS_ADD(name) \
313         debugfs_create_file(#name, 0400, \
314                 sta->debugfs.dir, sta, &sta_ ##name## _ops);
315
316 #define DEBUGFS_ADD_COUNTER(name, field)                                \
317         if (sizeof(sta->field) == sizeof(u32))                          \
318                 debugfs_create_u32(#name, 0400, sta->debugfs.dir,       \
319                         (u32 *) &sta->field);                           \
320         else                                                            \
321                 debugfs_create_u64(#name, 0400, sta->debugfs.dir,       \
322                         (u64 *) &sta->field);
323
324 void ieee80211_sta_debugfs_add(struct sta_info *sta)
325 {
326         struct dentry *stations_dir = sta->sdata->debugfs.subdir_stations;
327         u8 mac[3*ETH_ALEN];
328
329         sta->debugfs.add_has_run = true;
330
331         if (!stations_dir)
332                 return;
333
334         snprintf(mac, sizeof(mac), "%pM", sta->sta.addr);
335
336         /*
337          * This might fail due to a race condition:
338          * When mac80211 unlinks a station, the debugfs entries
339          * remain, but it is already possible to link a new
340          * station with the same address which triggers adding
341          * it to debugfs; therefore, if the old station isn't
342          * destroyed quickly enough the old station's debugfs
343          * dir might still be around.
344          */
345         sta->debugfs.dir = debugfs_create_dir(mac, stations_dir);
346         if (!sta->debugfs.dir)
347                 return;
348
349         DEBUGFS_ADD(flags);
350         DEBUGFS_ADD(num_ps_buf_frames);
351         DEBUGFS_ADD(inactive_ms);
352         DEBUGFS_ADD(connected_time);
353         DEBUGFS_ADD(last_seq_ctrl);
354         DEBUGFS_ADD(agg_status);
355         DEBUGFS_ADD(dev);
356         DEBUGFS_ADD(last_signal);
357         DEBUGFS_ADD(ht_capa);
358
359         DEBUGFS_ADD_COUNTER(rx_packets, rx_packets);
360         DEBUGFS_ADD_COUNTER(tx_packets, tx_packets);
361         DEBUGFS_ADD_COUNTER(rx_bytes, rx_bytes);
362         DEBUGFS_ADD_COUNTER(tx_bytes, tx_bytes);
363         DEBUGFS_ADD_COUNTER(rx_duplicates, num_duplicates);
364         DEBUGFS_ADD_COUNTER(rx_fragments, rx_fragments);
365         DEBUGFS_ADD_COUNTER(rx_dropped, rx_dropped);
366         DEBUGFS_ADD_COUNTER(tx_fragments, tx_fragments);
367         DEBUGFS_ADD_COUNTER(tx_filtered, tx_filtered_count);
368         DEBUGFS_ADD_COUNTER(tx_retry_failed, tx_retry_failed);
369         DEBUGFS_ADD_COUNTER(tx_retry_count, tx_retry_count);
370         DEBUGFS_ADD_COUNTER(wep_weak_iv_count, wep_weak_iv_count);
371 }
372
373 void ieee80211_sta_debugfs_remove(struct sta_info *sta)
374 {
375         debugfs_remove_recursive(sta->debugfs.dir);
376         sta->debugfs.dir = NULL;
377 }