Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
[linux-2.6-microblaze.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  * Copyright 2013-2014  Intel Mobile Communications GmbH
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License version 2 as
9  * published by the Free Software Foundation.
10  */
11
12 #include <linux/debugfs.h>
13 #include <linux/ieee80211.h>
14 #include "ieee80211_i.h"
15 #include "debugfs.h"
16 #include "debugfs_sta.h"
17 #include "sta_info.h"
18 #include "driver-ops.h"
19
20 /* sta attributtes */
21
22 #define STA_READ(name, field, format_string)                            \
23 static ssize_t sta_ ##name## _read(struct file *file,                   \
24                                    char __user *userbuf,                \
25                                    size_t count, loff_t *ppos)          \
26 {                                                                       \
27         struct sta_info *sta = file->private_data;                      \
28         return mac80211_format_buffer(userbuf, count, ppos,             \
29                                       format_string, sta->field);       \
30 }
31 #define STA_READ_D(name, field) STA_READ(name, field, "%d\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
54 static ssize_t sta_flags_read(struct file *file, char __user *userbuf,
55                               size_t count, loff_t *ppos)
56 {
57         char buf[121];
58         struct sta_info *sta = file->private_data;
59
60 #define TEST(flg) \
61         test_sta_flag(sta, WLAN_STA_##flg) ? #flg "\n" : ""
62
63         int res = scnprintf(buf, sizeof(buf),
64                             "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
65                             TEST(AUTH), TEST(ASSOC), TEST(PS_STA),
66                             TEST(PS_DRIVER), TEST(AUTHORIZED),
67                             TEST(SHORT_PREAMBLE),
68                             sta->sta.wme ? "WME\n" : "",
69                             TEST(WDS), TEST(CLEAR_PS_FILT),
70                             TEST(MFP), TEST(BLOCK_BA), TEST(PSPOLL),
71                             TEST(UAPSD), TEST(SP), TEST(TDLS_PEER),
72                             TEST(TDLS_PEER_AUTH), TEST(TDLS_INITIATOR),
73                             TEST(TDLS_CHAN_SWITCH), TEST(TDLS_OFF_CHANNEL),
74                             TEST(4ADDR_EVENT), TEST(INSERTED),
75                             TEST(RATE_CONTROL), TEST(TOFFSET_KNOWN),
76                             TEST(MPSP_OWNER), TEST(MPSP_RECIPIENT));
77 #undef TEST
78         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
79 }
80 STA_OPS(flags);
81
82 static ssize_t sta_num_ps_buf_frames_read(struct file *file,
83                                           char __user *userbuf,
84                                           size_t count, loff_t *ppos)
85 {
86         struct sta_info *sta = file->private_data;
87         char buf[17*IEEE80211_NUM_ACS], *p = buf;
88         int ac;
89
90         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
91                 p += scnprintf(p, sizeof(buf)+buf-p, "AC%d: %d\n", ac,
92                                skb_queue_len(&sta->ps_tx_buf[ac]) +
93                                skb_queue_len(&sta->tx_filtered[ac]));
94         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
95 }
96 STA_OPS(num_ps_buf_frames);
97
98 static ssize_t sta_last_seq_ctrl_read(struct file *file, char __user *userbuf,
99                                       size_t count, loff_t *ppos)
100 {
101         char buf[15*IEEE80211_NUM_TIDS], *p = buf;
102         int i;
103         struct sta_info *sta = file->private_data;
104         for (i = 0; i < IEEE80211_NUM_TIDS; i++)
105                 p += scnprintf(p, sizeof(buf)+buf-p, "%x ",
106                                le16_to_cpu(sta->last_seq_ctrl[i]));
107         p += scnprintf(p, sizeof(buf)+buf-p, "\n");
108         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
109 }
110 STA_OPS(last_seq_ctrl);
111
112 static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf,
113                                         size_t count, loff_t *ppos)
114 {
115         char buf[71 + IEEE80211_NUM_TIDS * 40], *p = buf;
116         int i;
117         struct sta_info *sta = file->private_data;
118         struct tid_ampdu_rx *tid_rx;
119         struct tid_ampdu_tx *tid_tx;
120
121         rcu_read_lock();
122
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\tDTKN\tSSN\t\tTX\tDTKN\tpending\n");
127
128         for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
129                 tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[i]);
130                 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[i]);
131
132                 p += scnprintf(p, sizeof(buf) + buf - p, "%02d", i);
133                 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_rx);
134                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
135                                 tid_rx ? tid_rx->dialog_token : 0);
136                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x",
137                                 tid_rx ? tid_rx->ssn : 0);
138
139                 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_tx);
140                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
141                                 tid_tx ? tid_tx->dialog_token : 0);
142                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d",
143                                 tid_tx ? skb_queue_len(&tid_tx->pending) : 0);
144                 p += scnprintf(p, sizeof(buf) + buf - p, "\n");
145         }
146         rcu_read_unlock();
147
148         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
149 }
150
151 static ssize_t sta_agg_status_write(struct file *file, const char __user *userbuf,
152                                     size_t count, loff_t *ppos)
153 {
154         char _buf[12] = {}, *buf = _buf;
155         struct sta_info *sta = file->private_data;
156         bool start, tx;
157         unsigned long tid;
158         int ret;
159
160         if (count > sizeof(_buf))
161                 return -EINVAL;
162
163         if (copy_from_user(buf, userbuf, count))
164                 return -EFAULT;
165
166         buf[sizeof(_buf) - 1] = '\0';
167
168         if (strncmp(buf, "tx ", 3) == 0) {
169                 buf += 3;
170                 tx = true;
171         } else if (strncmp(buf, "rx ", 3) == 0) {
172                 buf += 3;
173                 tx = false;
174         } else
175                 return -EINVAL;
176
177         if (strncmp(buf, "start ", 6) == 0) {
178                 buf += 6;
179                 start = true;
180                 if (!tx)
181                         return -EINVAL;
182         } else if (strncmp(buf, "stop ", 5) == 0) {
183                 buf += 5;
184                 start = false;
185         } else
186                 return -EINVAL;
187
188         ret = kstrtoul(buf, 0, &tid);
189         if (ret)
190                 return ret;
191
192         if (tid >= IEEE80211_NUM_TIDS)
193                 return -EINVAL;
194
195         if (tx) {
196                 if (start)
197                         ret = ieee80211_start_tx_ba_session(&sta->sta, tid, 5000);
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,
202                                                3, true);
203                 ret = 0;
204         }
205
206         return ret ?: count;
207 }
208 STA_OPS_RW(agg_status);
209
210 static ssize_t sta_ht_capa_read(struct file *file, char __user *userbuf,
211                                 size_t count, loff_t *ppos)
212 {
213 #define PRINT_HT_CAP(_cond, _str) \
214         do { \
215         if (_cond) \
216                         p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \
217         } while (0)
218         char buf[512], *p = buf;
219         int i;
220         struct sta_info *sta = file->private_data;
221         struct ieee80211_sta_ht_cap *htc = &sta->sta.ht_cap;
222
223         p += scnprintf(p, sizeof(buf) + buf - p, "ht %ssupported\n",
224                         htc->ht_supported ? "" : "not ");
225         if (htc->ht_supported) {
226                 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.4x\n", htc->cap);
227
228                 PRINT_HT_CAP((htc->cap & BIT(0)), "RX LDPC");
229                 PRINT_HT_CAP((htc->cap & BIT(1)), "HT20/HT40");
230                 PRINT_HT_CAP(!(htc->cap & BIT(1)), "HT20");
231
232                 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 0, "Static SM Power Save");
233                 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 1, "Dynamic SM Power Save");
234                 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 3, "SM Power Save disabled");
235
236                 PRINT_HT_CAP((htc->cap & BIT(4)), "RX Greenfield");
237                 PRINT_HT_CAP((htc->cap & BIT(5)), "RX HT20 SGI");
238                 PRINT_HT_CAP((htc->cap & BIT(6)), "RX HT40 SGI");
239                 PRINT_HT_CAP((htc->cap & BIT(7)), "TX STBC");
240
241                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 0, "No RX STBC");
242                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 1, "RX STBC 1-stream");
243                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 2, "RX STBC 2-streams");
244                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 3, "RX STBC 3-streams");
245
246                 PRINT_HT_CAP((htc->cap & BIT(10)), "HT Delayed Block Ack");
247
248                 PRINT_HT_CAP(!(htc->cap & BIT(11)), "Max AMSDU length: "
249                              "3839 bytes");
250                 PRINT_HT_CAP((htc->cap & BIT(11)), "Max AMSDU length: "
251                              "7935 bytes");
252
253                 /*
254                  * For beacons and probe response this would mean the BSS
255                  * does or does not allow the usage of DSSS/CCK HT40.
256                  * Otherwise it means the STA does or does not use
257                  * DSSS/CCK HT40.
258                  */
259                 PRINT_HT_CAP((htc->cap & BIT(12)), "DSSS/CCK HT40");
260                 PRINT_HT_CAP(!(htc->cap & BIT(12)), "No DSSS/CCK HT40");
261
262                 /* BIT(13) is reserved */
263
264                 PRINT_HT_CAP((htc->cap & BIT(14)), "40 MHz Intolerant");
265
266                 PRINT_HT_CAP((htc->cap & BIT(15)), "L-SIG TXOP protection");
267
268                 p += scnprintf(p, sizeof(buf)+buf-p, "ampdu factor/density: %d/%d\n",
269                                 htc->ampdu_factor, htc->ampdu_density);
270                 p += scnprintf(p, sizeof(buf)+buf-p, "MCS mask:");
271
272                 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
273                         p += scnprintf(p, sizeof(buf)+buf-p, " %.2x",
274                                         htc->mcs.rx_mask[i]);
275                 p += scnprintf(p, sizeof(buf)+buf-p, "\n");
276
277                 /* If not set this is meaningless */
278                 if (le16_to_cpu(htc->mcs.rx_highest)) {
279                         p += scnprintf(p, sizeof(buf)+buf-p,
280                                        "MCS rx highest: %d Mbps\n",
281                                        le16_to_cpu(htc->mcs.rx_highest));
282                 }
283
284                 p += scnprintf(p, sizeof(buf)+buf-p, "MCS tx params: %x\n",
285                                 htc->mcs.tx_params);
286         }
287
288         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
289 }
290 STA_OPS(ht_capa);
291
292 static ssize_t sta_vht_capa_read(struct file *file, char __user *userbuf,
293                                  size_t count, loff_t *ppos)
294 {
295         char buf[128], *p = buf;
296         struct sta_info *sta = file->private_data;
297         struct ieee80211_sta_vht_cap *vhtc = &sta->sta.vht_cap;
298
299         p += scnprintf(p, sizeof(buf) + buf - p, "VHT %ssupported\n",
300                         vhtc->vht_supported ? "" : "not ");
301         if (vhtc->vht_supported) {
302                 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.8x\n", vhtc->cap);
303
304                 p += scnprintf(p, sizeof(buf)+buf-p, "RX MCS: %.4x\n",
305                                le16_to_cpu(vhtc->vht_mcs.rx_mcs_map));
306                 if (vhtc->vht_mcs.rx_highest)
307                         p += scnprintf(p, sizeof(buf)+buf-p,
308                                        "MCS RX highest: %d Mbps\n",
309                                        le16_to_cpu(vhtc->vht_mcs.rx_highest));
310                 p += scnprintf(p, sizeof(buf)+buf-p, "TX MCS: %.4x\n",
311                                le16_to_cpu(vhtc->vht_mcs.tx_mcs_map));
312                 if (vhtc->vht_mcs.tx_highest)
313                         p += scnprintf(p, sizeof(buf)+buf-p,
314                                        "MCS TX highest: %d Mbps\n",
315                                        le16_to_cpu(vhtc->vht_mcs.tx_highest));
316         }
317
318         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
319 }
320 STA_OPS(vht_capa);
321
322
323 #define DEBUGFS_ADD(name) \
324         debugfs_create_file(#name, 0400, \
325                 sta->debugfs.dir, sta, &sta_ ##name## _ops);
326
327 #define DEBUGFS_ADD_COUNTER(name, field)                                \
328         if (sizeof(sta->field) == sizeof(u32))                          \
329                 debugfs_create_u32(#name, 0400, sta->debugfs.dir,       \
330                         (u32 *) &sta->field);                           \
331         else                                                            \
332                 debugfs_create_u64(#name, 0400, sta->debugfs.dir,       \
333                         (u64 *) &sta->field);
334
335 void ieee80211_sta_debugfs_add(struct sta_info *sta)
336 {
337         struct ieee80211_local *local = sta->local;
338         struct ieee80211_sub_if_data *sdata = sta->sdata;
339         struct dentry *stations_dir = sta->sdata->debugfs.subdir_stations;
340         u8 mac[3*ETH_ALEN];
341
342         sta->debugfs.add_has_run = true;
343
344         if (!stations_dir)
345                 return;
346
347         snprintf(mac, sizeof(mac), "%pM", sta->sta.addr);
348
349         /*
350          * This might fail due to a race condition:
351          * When mac80211 unlinks a station, the debugfs entries
352          * remain, but it is already possible to link a new
353          * station with the same address which triggers adding
354          * it to debugfs; therefore, if the old station isn't
355          * destroyed quickly enough the old station's debugfs
356          * dir might still be around.
357          */
358         sta->debugfs.dir = debugfs_create_dir(mac, stations_dir);
359         if (!sta->debugfs.dir)
360                 return;
361
362         DEBUGFS_ADD(flags);
363         DEBUGFS_ADD(num_ps_buf_frames);
364         DEBUGFS_ADD(last_seq_ctrl);
365         DEBUGFS_ADD(agg_status);
366         DEBUGFS_ADD(ht_capa);
367         DEBUGFS_ADD(vht_capa);
368
369         DEBUGFS_ADD_COUNTER(rx_duplicates, rx_stats.num_duplicates);
370         DEBUGFS_ADD_COUNTER(rx_fragments, rx_stats.fragments);
371         DEBUGFS_ADD_COUNTER(tx_filtered, status_stats.filtered);
372
373         if (sizeof(sta->driver_buffered_tids) == sizeof(u32))
374                 debugfs_create_x32("driver_buffered_tids", 0400,
375                                    sta->debugfs.dir,
376                                    (u32 *)&sta->driver_buffered_tids);
377         else
378                 debugfs_create_x64("driver_buffered_tids", 0400,
379                                    sta->debugfs.dir,
380                                    (u64 *)&sta->driver_buffered_tids);
381
382         drv_sta_add_debugfs(local, sdata, &sta->sta, sta->debugfs.dir);
383 }
384
385 void ieee80211_sta_debugfs_remove(struct sta_info *sta)
386 {
387         struct ieee80211_local *local = sta->local;
388         struct ieee80211_sub_if_data *sdata = sta->sdata;
389
390         drv_sta_remove_debugfs(local, sdata, &sta->sta, sta->debugfs.dir);
391         debugfs_remove_recursive(sta->debugfs.dir);
392         sta->debugfs.dir = NULL;
393 }