simple_open: automatically convert to simple_open()
[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 = simple_open,                                            \
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 = simple_open,                                            \
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%s%s",
67                             TEST(AUTH), TEST(ASSOC), TEST(PS_STA),
68                             TEST(PS_DRIVER), TEST(AUTHORIZED),
69                             TEST(SHORT_PREAMBLE),
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), TEST(4ADDR_EVENT),
74                             TEST(INSERTED), TEST(RATE_CONTROL));
75 #undef TEST
76         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
77 }
78 STA_OPS(flags);
79
80 static ssize_t sta_num_ps_buf_frames_read(struct file *file,
81                                           char __user *userbuf,
82                                           size_t count, loff_t *ppos)
83 {
84         struct sta_info *sta = file->private_data;
85         char buf[17*IEEE80211_NUM_ACS], *p = buf;
86         int ac;
87
88         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
89                 p += scnprintf(p, sizeof(buf)+buf-p, "AC%d: %d\n", ac,
90                                skb_queue_len(&sta->ps_tx_buf[ac]) +
91                                skb_queue_len(&sta->tx_filtered[ac]));
92         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
93 }
94 STA_OPS(num_ps_buf_frames);
95
96 static ssize_t sta_inactive_ms_read(struct file *file, char __user *userbuf,
97                                     size_t count, loff_t *ppos)
98 {
99         struct sta_info *sta = file->private_data;
100         return mac80211_format_buffer(userbuf, count, ppos, "%d\n",
101                                       jiffies_to_msecs(jiffies - sta->last_rx));
102 }
103 STA_OPS(inactive_ms);
104
105
106 static ssize_t sta_connected_time_read(struct file *file, char __user *userbuf,
107                                         size_t count, loff_t *ppos)
108 {
109         struct sta_info *sta = file->private_data;
110         struct timespec uptime;
111         struct tm result;
112         long connected_time_secs;
113         char buf[100];
114         int res;
115         do_posix_clock_monotonic_gettime(&uptime);
116         connected_time_secs = uptime.tv_sec - sta->last_connected;
117         time_to_tm(connected_time_secs, 0, &result);
118         result.tm_year -= 70;
119         result.tm_mday -= 1;
120         res = scnprintf(buf, sizeof(buf),
121                 "years  - %ld\nmonths - %d\ndays   - %d\nclock  - %d:%d:%d\n\n",
122                         result.tm_year, result.tm_mon, result.tm_mday,
123                         result.tm_hour, result.tm_min, result.tm_sec);
124         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
125 }
126 STA_OPS(connected_time);
127
128
129
130 static ssize_t sta_last_seq_ctrl_read(struct file *file, char __user *userbuf,
131                                       size_t count, loff_t *ppos)
132 {
133         char buf[15*NUM_RX_DATA_QUEUES], *p = buf;
134         int i;
135         struct sta_info *sta = file->private_data;
136         for (i = 0; i < NUM_RX_DATA_QUEUES; i++)
137                 p += scnprintf(p, sizeof(buf)+buf-p, "%x ",
138                                le16_to_cpu(sta->last_seq_ctrl[i]));
139         p += scnprintf(p, sizeof(buf)+buf-p, "\n");
140         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
141 }
142 STA_OPS(last_seq_ctrl);
143
144 static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf,
145                                         size_t count, loff_t *ppos)
146 {
147         char buf[71 + STA_TID_NUM * 40], *p = buf;
148         int i;
149         struct sta_info *sta = file->private_data;
150         struct tid_ampdu_rx *tid_rx;
151         struct tid_ampdu_tx *tid_tx;
152
153         rcu_read_lock();
154
155         p += scnprintf(p, sizeof(buf) + buf - p, "next dialog_token: %#02x\n",
156                         sta->ampdu_mlme.dialog_token_allocator + 1);
157         p += scnprintf(p, sizeof(buf) + buf - p,
158                        "TID\t\tRX active\tDTKN\tSSN\t\tTX\tDTKN\tpending\n");
159
160         for (i = 0; i < STA_TID_NUM; i++) {
161                 tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[i]);
162                 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[i]);
163
164                 p += scnprintf(p, sizeof(buf) + buf - p, "%02d", i);
165                 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_rx);
166                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
167                                 tid_rx ? tid_rx->dialog_token : 0);
168                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x",
169                                 tid_rx ? tid_rx->ssn : 0);
170
171                 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_tx);
172                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
173                                 tid_tx ? tid_tx->dialog_token : 0);
174                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d",
175                                 tid_tx ? skb_queue_len(&tid_tx->pending) : 0);
176                 p += scnprintf(p, sizeof(buf) + buf - p, "\n");
177         }
178         rcu_read_unlock();
179
180         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
181 }
182
183 static ssize_t sta_agg_status_write(struct file *file, const char __user *userbuf,
184                                     size_t count, loff_t *ppos)
185 {
186         char _buf[12], *buf = _buf;
187         struct sta_info *sta = file->private_data;
188         bool start, tx;
189         unsigned long tid;
190         int ret;
191
192         if (count > sizeof(_buf))
193                 return -EINVAL;
194
195         if (copy_from_user(buf, userbuf, count))
196                 return -EFAULT;
197
198         buf[sizeof(_buf) - 1] = '\0';
199
200         if (strncmp(buf, "tx ", 3) == 0) {
201                 buf += 3;
202                 tx = true;
203         } else if (strncmp(buf, "rx ", 3) == 0) {
204                 buf += 3;
205                 tx = false;
206         } else
207                 return -EINVAL;
208
209         if (strncmp(buf, "start ", 6) == 0) {
210                 buf += 6;
211                 start = true;
212                 if (!tx)
213                         return -EINVAL;
214         } else if (strncmp(buf, "stop ", 5) == 0) {
215                 buf += 5;
216                 start = false;
217         } else
218                 return -EINVAL;
219
220         tid = simple_strtoul(buf, NULL, 0);
221
222         if (tid >= STA_TID_NUM)
223                 return -EINVAL;
224
225         if (tx) {
226                 if (start)
227                         ret = ieee80211_start_tx_ba_session(&sta->sta, tid, 5000);
228                 else
229                         ret = ieee80211_stop_tx_ba_session(&sta->sta, tid);
230         } else {
231                 __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT,
232                                                3, true);
233                 ret = 0;
234         }
235
236         return ret ?: count;
237 }
238 STA_OPS_RW(agg_status);
239
240 static ssize_t sta_ht_capa_read(struct file *file, char __user *userbuf,
241                                 size_t count, loff_t *ppos)
242 {
243 #define PRINT_HT_CAP(_cond, _str) \
244         do { \
245         if (_cond) \
246                         p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \
247         } while (0)
248         char buf[512], *p = buf;
249         int i;
250         struct sta_info *sta = file->private_data;
251         struct ieee80211_sta_ht_cap *htc = &sta->sta.ht_cap;
252
253         p += scnprintf(p, sizeof(buf) + buf - p, "ht %ssupported\n",
254                         htc->ht_supported ? "" : "not ");
255         if (htc->ht_supported) {
256                 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.4x\n", htc->cap);
257
258                 PRINT_HT_CAP((htc->cap & BIT(0)), "RX LDPC");
259                 PRINT_HT_CAP((htc->cap & BIT(1)), "HT20/HT40");
260                 PRINT_HT_CAP(!(htc->cap & BIT(1)), "HT20");
261
262                 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 0, "Static SM Power Save");
263                 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 1, "Dynamic SM Power Save");
264                 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 3, "SM Power Save disabled");
265
266                 PRINT_HT_CAP((htc->cap & BIT(4)), "RX Greenfield");
267                 PRINT_HT_CAP((htc->cap & BIT(5)), "RX HT20 SGI");
268                 PRINT_HT_CAP((htc->cap & BIT(6)), "RX HT40 SGI");
269                 PRINT_HT_CAP((htc->cap & BIT(7)), "TX STBC");
270
271                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 0, "No RX STBC");
272                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 1, "RX STBC 1-stream");
273                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 2, "RX STBC 2-streams");
274                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 3, "RX STBC 3-streams");
275
276                 PRINT_HT_CAP((htc->cap & BIT(10)), "HT Delayed Block Ack");
277
278                 PRINT_HT_CAP(!(htc->cap & BIT(11)), "Max AMSDU length: "
279                              "3839 bytes");
280                 PRINT_HT_CAP((htc->cap & BIT(11)), "Max AMSDU length: "
281                              "7935 bytes");
282
283                 /*
284                  * For beacons and probe response this would mean the BSS
285                  * does or does not allow the usage of DSSS/CCK HT40.
286                  * Otherwise it means the STA does or does not use
287                  * DSSS/CCK HT40.
288                  */
289                 PRINT_HT_CAP((htc->cap & BIT(12)), "DSSS/CCK HT40");
290                 PRINT_HT_CAP(!(htc->cap & BIT(12)), "No DSSS/CCK HT40");
291
292                 /* BIT(13) is reserved */
293
294                 PRINT_HT_CAP((htc->cap & BIT(14)), "40 MHz Intolerant");
295
296                 PRINT_HT_CAP((htc->cap & BIT(15)), "L-SIG TXOP protection");
297
298                 p += scnprintf(p, sizeof(buf)+buf-p, "ampdu factor/density: %d/%d\n",
299                                 htc->ampdu_factor, htc->ampdu_density);
300                 p += scnprintf(p, sizeof(buf)+buf-p, "MCS mask:");
301
302                 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
303                         p += scnprintf(p, sizeof(buf)+buf-p, " %.2x",
304                                         htc->mcs.rx_mask[i]);
305                 p += scnprintf(p, sizeof(buf)+buf-p, "\n");
306
307                 /* If not set this is meaningless */
308                 if (le16_to_cpu(htc->mcs.rx_highest)) {
309                         p += scnprintf(p, sizeof(buf)+buf-p,
310                                        "MCS rx highest: %d Mbps\n",
311                                        le16_to_cpu(htc->mcs.rx_highest));
312                 }
313
314                 p += scnprintf(p, sizeof(buf)+buf-p, "MCS tx params: %x\n",
315                                 htc->mcs.tx_params);
316         }
317
318         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
319 }
320 STA_OPS(ht_capa);
321
322 #define DEBUGFS_ADD(name) \
323         debugfs_create_file(#name, 0400, \
324                 sta->debugfs.dir, sta, &sta_ ##name## _ops);
325
326 #define DEBUGFS_ADD_COUNTER(name, field)                                \
327         if (sizeof(sta->field) == sizeof(u32))                          \
328                 debugfs_create_u32(#name, 0400, sta->debugfs.dir,       \
329                         (u32 *) &sta->field);                           \
330         else                                                            \
331                 debugfs_create_u64(#name, 0400, sta->debugfs.dir,       \
332                         (u64 *) &sta->field);
333
334 void ieee80211_sta_debugfs_add(struct sta_info *sta)
335 {
336         struct dentry *stations_dir = sta->sdata->debugfs.subdir_stations;
337         u8 mac[3*ETH_ALEN];
338
339         sta->debugfs.add_has_run = true;
340
341         if (!stations_dir)
342                 return;
343
344         snprintf(mac, sizeof(mac), "%pM", sta->sta.addr);
345
346         /*
347          * This might fail due to a race condition:
348          * When mac80211 unlinks a station, the debugfs entries
349          * remain, but it is already possible to link a new
350          * station with the same address which triggers adding
351          * it to debugfs; therefore, if the old station isn't
352          * destroyed quickly enough the old station's debugfs
353          * dir might still be around.
354          */
355         sta->debugfs.dir = debugfs_create_dir(mac, stations_dir);
356         if (!sta->debugfs.dir)
357                 return;
358
359         DEBUGFS_ADD(flags);
360         DEBUGFS_ADD(num_ps_buf_frames);
361         DEBUGFS_ADD(inactive_ms);
362         DEBUGFS_ADD(connected_time);
363         DEBUGFS_ADD(last_seq_ctrl);
364         DEBUGFS_ADD(agg_status);
365         DEBUGFS_ADD(dev);
366         DEBUGFS_ADD(last_signal);
367         DEBUGFS_ADD(ht_capa);
368
369         DEBUGFS_ADD_COUNTER(rx_packets, rx_packets);
370         DEBUGFS_ADD_COUNTER(tx_packets, tx_packets);
371         DEBUGFS_ADD_COUNTER(rx_bytes, rx_bytes);
372         DEBUGFS_ADD_COUNTER(tx_bytes, tx_bytes);
373         DEBUGFS_ADD_COUNTER(rx_duplicates, num_duplicates);
374         DEBUGFS_ADD_COUNTER(rx_fragments, rx_fragments);
375         DEBUGFS_ADD_COUNTER(rx_dropped, rx_dropped);
376         DEBUGFS_ADD_COUNTER(tx_fragments, tx_fragments);
377         DEBUGFS_ADD_COUNTER(tx_filtered, tx_filtered_count);
378         DEBUGFS_ADD_COUNTER(tx_retry_failed, tx_retry_failed);
379         DEBUGFS_ADD_COUNTER(tx_retry_count, tx_retry_count);
380         DEBUGFS_ADD_COUNTER(wep_weak_iv_count, wep_weak_iv_count);
381 }
382
383 void ieee80211_sta_debugfs_remove(struct sta_info *sta)
384 {
385         debugfs_remove_recursive(sta->debugfs.dir);
386         sta->debugfs.dir = NULL;
387 }