Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/*
2 * mac80211 debugfs for wireless PHYs
3 *
4 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
5 * Copyright 2013-2014 Intel Mobile Communications GmbH
6 *
7 * GPLv2
8 *
9 */
10
11#include <linux/debugfs.h>
12#include <linux/rtnetlink.h>
13#include <linux/vmalloc.h>
14#include "ieee80211_i.h"
15#include "driver-ops.h"
16#include "rate.h"
17#include "debugfs.h"
18
19#define DEBUGFS_FORMAT_BUFFER_SIZE 100
20
21int mac80211_format_buffer(char __user *userbuf, size_t count,
22 loff_t *ppos, char *fmt, ...)
23{
24 va_list args;
25 char buf[DEBUGFS_FORMAT_BUFFER_SIZE];
26 int res;
27
28 va_start(args, fmt);
29 res = vscnprintf(buf, sizeof(buf), fmt, args);
30 va_end(args);
31
32 return simple_read_from_buffer(userbuf, count, ppos, buf, res);
33}
34
35#define DEBUGFS_READONLY_FILE_FN(name, fmt, value...) \
36static ssize_t name## _read(struct file *file, char __user *userbuf, \
37 size_t count, loff_t *ppos) \
38{ \
39 struct ieee80211_local *local = file->private_data; \
40 \
41 return mac80211_format_buffer(userbuf, count, ppos, \
42 fmt "\n", ##value); \
43}
44
45#define DEBUGFS_READONLY_FILE_OPS(name) \
46static const struct file_operations name## _ops = { \
47 .read = name## _read, \
48 .open = simple_open, \
49 .llseek = generic_file_llseek, \
50};
51
52#define DEBUGFS_READONLY_FILE(name, fmt, value...) \
53 DEBUGFS_READONLY_FILE_FN(name, fmt, value) \
54 DEBUGFS_READONLY_FILE_OPS(name)
55
56#define DEBUGFS_ADD(name) \
57 debugfs_create_file(#name, 0400, phyd, local, &name## _ops);
58
59#define DEBUGFS_ADD_MODE(name, mode) \
60 debugfs_create_file(#name, mode, phyd, local, &name## _ops);
61
62
63DEBUGFS_READONLY_FILE(user_power, "%d",
64 local->user_power_level);
65DEBUGFS_READONLY_FILE(power, "%d",
66 local->hw.conf.power_level);
67DEBUGFS_READONLY_FILE(total_ps_buffered, "%d",
68 local->total_ps_buffered);
69DEBUGFS_READONLY_FILE(wep_iv, "%#08x",
70 local->wep_iv & 0xffffff);
71DEBUGFS_READONLY_FILE(rate_ctrl_alg, "%s",
72 local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver");
73
74struct aqm_info {
75 struct ieee80211_local *local;
76 size_t size;
77 size_t len;
78 unsigned char buf[0];
79};
80
81#define AQM_HDR_LEN 200
82#define AQM_HW_ENTRY_LEN 40
83#define AQM_TXQ_ENTRY_LEN 110
84
85static int aqm_open(struct inode *inode, struct file *file)
86{
87 struct ieee80211_local *local = inode->i_private;
88 struct ieee80211_sub_if_data *sdata;
89 struct sta_info *sta;
90 struct txq_info *txqi;
91 struct fq *fq = &local->fq;
92 struct aqm_info *info = NULL;
93 int len = 0;
94 int i;
95
96 if (!local->ops->wake_tx_queue)
97 return -EOPNOTSUPP;
98
99 len += AQM_HDR_LEN;
100 len += 6 * AQM_HW_ENTRY_LEN;
101
102 rcu_read_lock();
103 list_for_each_entry_rcu(sdata, &local->interfaces, list)
104 len += AQM_TXQ_ENTRY_LEN;
105 list_for_each_entry_rcu(sta, &local->sta_list, list)
106 len += AQM_TXQ_ENTRY_LEN * ARRAY_SIZE(sta->sta.txq);
107 rcu_read_unlock();
108
109 info = vmalloc(len);
110 if (!info)
111 return -ENOMEM;
112
113 spin_lock_bh(&local->fq.lock);
114 rcu_read_lock();
115
116 file->private_data = info;
117 info->local = local;
118 info->size = len;
119 len = 0;
120
121 len += scnprintf(info->buf + len, info->size - len,
122 "* hw\n"
123 "access name value\n"
124 "R fq_flows_cnt %u\n"
125 "R fq_backlog %u\n"
126 "R fq_overlimit %u\n"
127 "R fq_collisions %u\n"
128 "RW fq_limit %u\n"
129 "RW fq_quantum %u\n",
130 fq->flows_cnt,
131 fq->backlog,
132 fq->overlimit,
133 fq->collisions,
134 fq->limit,
135 fq->quantum);
136
137 len += scnprintf(info->buf + len,
138 info->size - len,
139 "* vif\n"
140 "ifname addr ac backlog-bytes backlog-packets flows overlimit collisions tx-bytes tx-packets\n");
141
142 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
143 txqi = to_txq_info(sdata->vif.txq);
144 len += scnprintf(info->buf + len, info->size - len,
145 "%s %pM %u %u %u %u %u %u %u %u\n",
146 sdata->name,
147 sdata->vif.addr,
148 txqi->txq.ac,
149 txqi->tin.backlog_bytes,
150 txqi->tin.backlog_packets,
151 txqi->tin.flows,
152 txqi->tin.overlimit,
153 txqi->tin.collisions,
154 txqi->tin.tx_bytes,
155 txqi->tin.tx_packets);
156 }
157
158 len += scnprintf(info->buf + len,
159 info->size - len,
160 "* sta\n"
161 "ifname addr tid ac backlog-bytes backlog-packets flows overlimit collisions tx-bytes tx-packets\n");
162
163 list_for_each_entry_rcu(sta, &local->sta_list, list) {
164 sdata = sta->sdata;
165 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
166 txqi = to_txq_info(sta->sta.txq[i]);
167 len += scnprintf(info->buf + len, info->size - len,
168 "%s %pM %d %d %u %u %u %u %u %u %u\n",
169 sdata->name,
170 sta->sta.addr,
171 txqi->txq.tid,
172 txqi->txq.ac,
173 txqi->tin.backlog_bytes,
174 txqi->tin.backlog_packets,
175 txqi->tin.flows,
176 txqi->tin.overlimit,
177 txqi->tin.collisions,
178 txqi->tin.tx_bytes,
179 txqi->tin.tx_packets);
180 }
181 }
182
183 info->len = len;
184
185 rcu_read_unlock();
186 spin_unlock_bh(&local->fq.lock);
187
188 return 0;
189}
190
191static int aqm_release(struct inode *inode, struct file *file)
192{
193 vfree(file->private_data);
194 return 0;
195}
196
197static ssize_t aqm_read(struct file *file,
198 char __user *user_buf,
199 size_t count,
200 loff_t *ppos)
201{
202 struct aqm_info *info = file->private_data;
203
204 return simple_read_from_buffer(user_buf, count, ppos,
205 info->buf, info->len);
206}
207
208static ssize_t aqm_write(struct file *file,
209 const char __user *user_buf,
210 size_t count,
211 loff_t *ppos)
212{
213 struct aqm_info *info = file->private_data;
214 struct ieee80211_local *local = info->local;
215 char buf[100];
216 size_t len;
217
218 if (count > sizeof(buf))
219 return -EINVAL;
220
221 if (copy_from_user(buf, user_buf, count))
222 return -EFAULT;
223
224 buf[sizeof(buf) - 1] = '\0';
225 len = strlen(buf);
226 if (len > 0 && buf[len-1] == '\n')
227 buf[len-1] = 0;
228
229 if (sscanf(buf, "fq_limit %u", &local->fq.limit) == 1)
230 return count;
231 else if (sscanf(buf, "fq_quantum %u", &local->fq.quantum) == 1)
232 return count;
233
234 return -EINVAL;
235}
236
237static const struct file_operations aqm_ops = {
238 .write = aqm_write,
239 .read = aqm_read,
240 .open = aqm_open,
241 .release = aqm_release,
242 .llseek = default_llseek,
243};
244
245#ifdef CONFIG_PM
246static ssize_t reset_write(struct file *file, const char __user *user_buf,
247 size_t count, loff_t *ppos)
248{
249 struct ieee80211_local *local = file->private_data;
250
251 rtnl_lock();
252 __ieee80211_suspend(&local->hw, NULL);
253 __ieee80211_resume(&local->hw);
254 rtnl_unlock();
255
256 return count;
257}
258
259static const struct file_operations reset_ops = {
260 .write = reset_write,
261 .open = simple_open,
262 .llseek = noop_llseek,
263};
264#endif
265
266static const char *hw_flag_names[] = {
267#define FLAG(F) [IEEE80211_HW_##F] = #F
268 FLAG(HAS_RATE_CONTROL),
269 FLAG(RX_INCLUDES_FCS),
270 FLAG(HOST_BROADCAST_PS_BUFFERING),
271 FLAG(SIGNAL_UNSPEC),
272 FLAG(SIGNAL_DBM),
273 FLAG(NEED_DTIM_BEFORE_ASSOC),
274 FLAG(SPECTRUM_MGMT),
275 FLAG(AMPDU_AGGREGATION),
276 FLAG(SUPPORTS_PS),
277 FLAG(PS_NULLFUNC_STACK),
278 FLAG(SUPPORTS_DYNAMIC_PS),
279 FLAG(MFP_CAPABLE),
280 FLAG(WANT_MONITOR_VIF),
281 FLAG(NO_AUTO_VIF),
282 FLAG(SW_CRYPTO_CONTROL),
283 FLAG(SUPPORT_FAST_XMIT),
284 FLAG(REPORTS_TX_ACK_STATUS),
285 FLAG(CONNECTION_MONITOR),
286 FLAG(QUEUE_CONTROL),
287 FLAG(SUPPORTS_PER_STA_GTK),
288 FLAG(AP_LINK_PS),
289 FLAG(TX_AMPDU_SETUP_IN_HW),
290 FLAG(SUPPORTS_RC_TABLE),
291 FLAG(P2P_DEV_ADDR_FOR_INTF),
292 FLAG(TIMING_BEACON_ONLY),
293 FLAG(SUPPORTS_HT_CCK_RATES),
294 FLAG(CHANCTX_STA_CSA),
295 FLAG(SUPPORTS_CLONED_SKBS),
296 FLAG(SINGLE_SCAN_ON_ALL_BANDS),
297 FLAG(TDLS_WIDER_BW),
298 FLAG(SUPPORTS_AMSDU_IN_AMPDU),
299 FLAG(BEACON_TX_STATUS),
300 FLAG(NEEDS_UNIQUE_STA_ADDR),
301 FLAG(SUPPORTS_REORDERING_BUFFER),
302 FLAG(USES_RSS),
303 FLAG(TX_AMSDU),
304 FLAG(TX_FRAG_LIST),
305#undef FLAG
306};
307
308static ssize_t hwflags_read(struct file *file, char __user *user_buf,
309 size_t count, loff_t *ppos)
310{
311 struct ieee80211_local *local = file->private_data;
312 size_t bufsz = 30 * NUM_IEEE80211_HW_FLAGS;
313 char *buf = kzalloc(bufsz, GFP_KERNEL);
314 char *pos = buf, *end = buf + bufsz - 1;
315 ssize_t rv;
316 int i;
317
318 if (!buf)
319 return -ENOMEM;
320
321 /* fail compilation if somebody adds or removes
322 * a flag without updating the name array above
323 */
324 BUILD_BUG_ON(ARRAY_SIZE(hw_flag_names) != NUM_IEEE80211_HW_FLAGS);
325
326 for (i = 0; i < NUM_IEEE80211_HW_FLAGS; i++) {
327 if (test_bit(i, local->hw.flags))
328 pos += scnprintf(pos, end - pos, "%s\n",
329 hw_flag_names[i]);
330 }
331
332 rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
333 kfree(buf);
334 return rv;
335}
336
337static ssize_t queues_read(struct file *file, char __user *user_buf,
338 size_t count, loff_t *ppos)
339{
340 struct ieee80211_local *local = file->private_data;
341 unsigned long flags;
342 char buf[IEEE80211_MAX_QUEUES * 20];
343 int q, res = 0;
344
345 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
346 for (q = 0; q < local->hw.queues; q++)
347 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,
348 local->queue_stop_reasons[q],
349 skb_queue_len(&local->pending[q]));
350 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
351
352 return simple_read_from_buffer(user_buf, count, ppos, buf, res);
353}
354
355DEBUGFS_READONLY_FILE_OPS(hwflags);
356DEBUGFS_READONLY_FILE_OPS(queues);
357
358/* statistics stuff */
359
360static ssize_t format_devstat_counter(struct ieee80211_local *local,
361 char __user *userbuf,
362 size_t count, loff_t *ppos,
363 int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
364 int buflen))
365{
366 struct ieee80211_low_level_stats stats;
367 char buf[20];
368 int res;
369
370 rtnl_lock();
371 res = drv_get_stats(local, &stats);
372 rtnl_unlock();
373 if (res)
374 return res;
375 res = printvalue(&stats, buf, sizeof(buf));
376 return simple_read_from_buffer(userbuf, count, ppos, buf, res);
377}
378
379#define DEBUGFS_DEVSTATS_FILE(name) \
380static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
381 char *buf, int buflen) \
382{ \
383 return scnprintf(buf, buflen, "%u\n", stats->name); \
384} \
385static ssize_t stats_ ##name## _read(struct file *file, \
386 char __user *userbuf, \
387 size_t count, loff_t *ppos) \
388{ \
389 return format_devstat_counter(file->private_data, \
390 userbuf, \
391 count, \
392 ppos, \
393 print_devstats_##name); \
394} \
395 \
396static const struct file_operations stats_ ##name## _ops = { \
397 .read = stats_ ##name## _read, \
398 .open = simple_open, \
399 .llseek = generic_file_llseek, \
400};
401
402#define DEBUGFS_STATS_ADD(name) \
403 debugfs_create_u32(#name, 0400, statsd, &local->name);
404#define DEBUGFS_DEVSTATS_ADD(name) \
405 debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops);
406
407DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
408DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
409DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
410DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
411
412void debugfs_hw_add(struct ieee80211_local *local)
413{
414 struct dentry *phyd = local->hw.wiphy->debugfsdir;
415 struct dentry *statsd;
416
417 if (!phyd)
418 return;
419
420 local->debugfs.keys = debugfs_create_dir("keys", phyd);
421
422 DEBUGFS_ADD(total_ps_buffered);
423 DEBUGFS_ADD(wep_iv);
424 DEBUGFS_ADD(queues);
425#ifdef CONFIG_PM
426 DEBUGFS_ADD_MODE(reset, 0200);
427#endif
428 DEBUGFS_ADD(hwflags);
429 DEBUGFS_ADD(user_power);
430 DEBUGFS_ADD(power);
431 DEBUGFS_ADD_MODE(aqm, 0600);
432
433 statsd = debugfs_create_dir("statistics", phyd);
434
435 /* if the dir failed, don't put all the other things into the root! */
436 if (!statsd)
437 return;
438
439#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
440 DEBUGFS_STATS_ADD(dot11TransmittedFragmentCount);
441 DEBUGFS_STATS_ADD(dot11MulticastTransmittedFrameCount);
442 DEBUGFS_STATS_ADD(dot11FailedCount);
443 DEBUGFS_STATS_ADD(dot11RetryCount);
444 DEBUGFS_STATS_ADD(dot11MultipleRetryCount);
445 DEBUGFS_STATS_ADD(dot11FrameDuplicateCount);
446 DEBUGFS_STATS_ADD(dot11ReceivedFragmentCount);
447 DEBUGFS_STATS_ADD(dot11MulticastReceivedFrameCount);
448 DEBUGFS_STATS_ADD(dot11TransmittedFrameCount);
449 DEBUGFS_STATS_ADD(tx_handlers_drop);
450 DEBUGFS_STATS_ADD(tx_handlers_queued);
451 DEBUGFS_STATS_ADD(tx_handlers_drop_wep);
452 DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc);
453 DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port);
454 DEBUGFS_STATS_ADD(rx_handlers_drop);
455 DEBUGFS_STATS_ADD(rx_handlers_queued);
456 DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc);
457 DEBUGFS_STATS_ADD(rx_handlers_drop_defrag);
458 DEBUGFS_STATS_ADD(tx_expand_skb_head);
459 DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned);
460 DEBUGFS_STATS_ADD(rx_expand_skb_head_defrag);
461 DEBUGFS_STATS_ADD(rx_handlers_fragments);
462 DEBUGFS_STATS_ADD(tx_status_drop);
463#endif
464 DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount);
465 DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount);
466 DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount);
467 DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount);
468}