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 *
6 * GPLv2
7 *
8 */
9
10#include <linux/debugfs.h>
11#include <linux/rtnetlink.h>
12#include "ieee80211_i.h"
13#include "driver-ops.h"
14#include "rate.h"
15#include "debugfs.h"
16
17int mac80211_open_file_generic(struct inode *inode, struct file *file)
18{
19 file->private_data = inode->i_private;
20 return 0;
21}
22
23#define DEBUGFS_READONLY_FILE(name, buflen, fmt, value...) \
24static ssize_t name## _read(struct file *file, char __user *userbuf, \
25 size_t count, loff_t *ppos) \
26{ \
27 struct ieee80211_local *local = file->private_data; \
28 char buf[buflen]; \
29 int res; \
30 \
31 res = scnprintf(buf, buflen, fmt "\n", ##value); \
32 return simple_read_from_buffer(userbuf, count, ppos, buf, res); \
33} \
34 \
35static const struct file_operations name## _ops = { \
36 .read = name## _read, \
37 .open = mac80211_open_file_generic, \
38};
39
40#define DEBUGFS_ADD(name) \
41 local->debugfs.name = debugfs_create_file(#name, 0400, phyd, \
42 local, &name## _ops);
43
44#define DEBUGFS_ADD_MODE(name, mode) \
45 local->debugfs.name = debugfs_create_file(#name, mode, phyd, \
46 local, &name## _ops);
47
48#define DEBUGFS_DEL(name) \
49 debugfs_remove(local->debugfs.name); \
50 local->debugfs.name = NULL;
51
52
53DEBUGFS_READONLY_FILE(frequency, 20, "%d",
54 local->hw.conf.channel->center_freq);
55DEBUGFS_READONLY_FILE(total_ps_buffered, 20, "%d",
56 local->total_ps_buffered);
57DEBUGFS_READONLY_FILE(wep_iv, 20, "%#08x",
58 local->wep_iv & 0xffffff);
59DEBUGFS_READONLY_FILE(rate_ctrl_alg, 100, "%s",
60 local->rate_ctrl ? local->rate_ctrl->ops->name : "<unset>");
61
62static ssize_t tsf_read(struct file *file, char __user *user_buf,
63 size_t count, loff_t *ppos)
64{
65 struct ieee80211_local *local = file->private_data;
66 u64 tsf;
67 char buf[100];
68
69 tsf = drv_get_tsf(local);
70
71 snprintf(buf, sizeof(buf), "0x%016llx\n", (unsigned long long) tsf);
72
73 return simple_read_from_buffer(user_buf, count, ppos, buf, 19);
74}
75
76static ssize_t tsf_write(struct file *file,
77 const char __user *user_buf,
78 size_t count, loff_t *ppos)
79{
80 struct ieee80211_local *local = file->private_data;
81 unsigned long long tsf;
82 char buf[100];
83 size_t len;
84
85 len = min(count, sizeof(buf) - 1);
86 if (copy_from_user(buf, user_buf, len))
87 return -EFAULT;
88 buf[len] = '\0';
89
90 if (strncmp(buf, "reset", 5) == 0) {
91 if (local->ops->reset_tsf) {
92 drv_reset_tsf(local);
93 printk(KERN_INFO "%s: debugfs reset TSF\n", wiphy_name(local->hw.wiphy));
94 }
95 } else {
96 tsf = simple_strtoul(buf, NULL, 0);
97 if (local->ops->set_tsf) {
98 drv_set_tsf(local, tsf);
99 printk(KERN_INFO "%s: debugfs set TSF to %#018llx\n", wiphy_name(local->hw.wiphy), tsf);
100 }
101 }
102
103 return count;
104}
105
106static const struct file_operations tsf_ops = {
107 .read = tsf_read,
108 .write = tsf_write,
109 .open = mac80211_open_file_generic
110};
111
112static ssize_t reset_write(struct file *file, const char __user *user_buf,
113 size_t count, loff_t *ppos)
114{
115 struct ieee80211_local *local = file->private_data;
116
117 rtnl_lock();
118 __ieee80211_suspend(&local->hw);
119 __ieee80211_resume(&local->hw);
120 rtnl_unlock();
121
122 return count;
123}
124
125static const struct file_operations reset_ops = {
126 .write = reset_write,
127 .open = mac80211_open_file_generic,
128};
129
130static ssize_t noack_read(struct file *file, char __user *user_buf,
131 size_t count, loff_t *ppos)
132{
133 struct ieee80211_local *local = file->private_data;
134 int res;
135 char buf[10];
136
137 res = scnprintf(buf, sizeof(buf), "%d\n", local->wifi_wme_noack_test);
138
139 return simple_read_from_buffer(user_buf, count, ppos, buf, res);
140}
141
142static ssize_t noack_write(struct file *file,
143 const char __user *user_buf,
144 size_t count, loff_t *ppos)
145{
146 struct ieee80211_local *local = file->private_data;
147 char buf[10];
148 size_t len;
149
150 len = min(count, sizeof(buf) - 1);
151 if (copy_from_user(buf, user_buf, len))
152 return -EFAULT;
153 buf[len] = '\0';
154
155 local->wifi_wme_noack_test = !!simple_strtoul(buf, NULL, 0);
156
157 return count;
158}
159
160static const struct file_operations noack_ops = {
161 .read = noack_read,
162 .write = noack_write,
163 .open = mac80211_open_file_generic
164};
165
166static ssize_t queues_read(struct file *file, char __user *user_buf,
167 size_t count, loff_t *ppos)
168{
169 struct ieee80211_local *local = file->private_data;
170 unsigned long flags;
171 char buf[IEEE80211_MAX_QUEUES * 20];
172 int q, res = 0;
173
174 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
175 for (q = 0; q < local->hw.queues; q++)
176 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,
177 local->queue_stop_reasons[q],
178 skb_queue_len(&local->pending[q]));
179 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
180
181 return simple_read_from_buffer(user_buf, count, ppos, buf, res);
182}
183
184static const struct file_operations queues_ops = {
185 .read = queues_read,
186 .open = mac80211_open_file_generic
187};
188
189/* statistics stuff */
190
191#define DEBUGFS_STATS_FILE(name, buflen, fmt, value...) \
192 DEBUGFS_READONLY_FILE(stats_ ##name, buflen, fmt, ##value)
193
194static ssize_t format_devstat_counter(struct ieee80211_local *local,
195 char __user *userbuf,
196 size_t count, loff_t *ppos,
197 int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
198 int buflen))
199{
200 struct ieee80211_low_level_stats stats;
201 char buf[20];
202 int res;
203
204 rtnl_lock();
205 res = drv_get_stats(local, &stats);
206 rtnl_unlock();
207 if (res)
208 return res;
209 res = printvalue(&stats, buf, sizeof(buf));
210 return simple_read_from_buffer(userbuf, count, ppos, buf, res);
211}
212
213#define DEBUGFS_DEVSTATS_FILE(name) \
214static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
215 char *buf, int buflen) \
216{ \
217 return scnprintf(buf, buflen, "%u\n", stats->name); \
218} \
219static ssize_t stats_ ##name## _read(struct file *file, \
220 char __user *userbuf, \
221 size_t count, loff_t *ppos) \
222{ \
223 return format_devstat_counter(file->private_data, \
224 userbuf, \
225 count, \
226 ppos, \
227 print_devstats_##name); \
228} \
229 \
230static const struct file_operations stats_ ##name## _ops = { \
231 .read = stats_ ##name## _read, \
232 .open = mac80211_open_file_generic, \
233};
234
235#define DEBUGFS_STATS_ADD(name) \
236 local->debugfs.stats.name = debugfs_create_file(#name, 0400, statsd,\
237 local, &stats_ ##name## _ops);
238
239#define DEBUGFS_STATS_DEL(name) \
240 debugfs_remove(local->debugfs.stats.name); \
241 local->debugfs.stats.name = NULL;
242
243DEBUGFS_STATS_FILE(transmitted_fragment_count, 20, "%u",
244 local->dot11TransmittedFragmentCount);
245DEBUGFS_STATS_FILE(multicast_transmitted_frame_count, 20, "%u",
246 local->dot11MulticastTransmittedFrameCount);
247DEBUGFS_STATS_FILE(failed_count, 20, "%u",
248 local->dot11FailedCount);
249DEBUGFS_STATS_FILE(retry_count, 20, "%u",
250 local->dot11RetryCount);
251DEBUGFS_STATS_FILE(multiple_retry_count, 20, "%u",
252 local->dot11MultipleRetryCount);
253DEBUGFS_STATS_FILE(frame_duplicate_count, 20, "%u",
254 local->dot11FrameDuplicateCount);
255DEBUGFS_STATS_FILE(received_fragment_count, 20, "%u",
256 local->dot11ReceivedFragmentCount);
257DEBUGFS_STATS_FILE(multicast_received_frame_count, 20, "%u",
258 local->dot11MulticastReceivedFrameCount);
259DEBUGFS_STATS_FILE(transmitted_frame_count, 20, "%u",
260 local->dot11TransmittedFrameCount);
261#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
262DEBUGFS_STATS_FILE(tx_handlers_drop, 20, "%u",
263 local->tx_handlers_drop);
264DEBUGFS_STATS_FILE(tx_handlers_queued, 20, "%u",
265 local->tx_handlers_queued);
266DEBUGFS_STATS_FILE(tx_handlers_drop_unencrypted, 20, "%u",
267 local->tx_handlers_drop_unencrypted);
268DEBUGFS_STATS_FILE(tx_handlers_drop_fragment, 20, "%u",
269 local->tx_handlers_drop_fragment);
270DEBUGFS_STATS_FILE(tx_handlers_drop_wep, 20, "%u",
271 local->tx_handlers_drop_wep);
272DEBUGFS_STATS_FILE(tx_handlers_drop_not_assoc, 20, "%u",
273 local->tx_handlers_drop_not_assoc);
274DEBUGFS_STATS_FILE(tx_handlers_drop_unauth_port, 20, "%u",
275 local->tx_handlers_drop_unauth_port);
276DEBUGFS_STATS_FILE(rx_handlers_drop, 20, "%u",
277 local->rx_handlers_drop);
278DEBUGFS_STATS_FILE(rx_handlers_queued, 20, "%u",
279 local->rx_handlers_queued);
280DEBUGFS_STATS_FILE(rx_handlers_drop_nullfunc, 20, "%u",
281 local->rx_handlers_drop_nullfunc);
282DEBUGFS_STATS_FILE(rx_handlers_drop_defrag, 20, "%u",
283 local->rx_handlers_drop_defrag);
284DEBUGFS_STATS_FILE(rx_handlers_drop_short, 20, "%u",
285 local->rx_handlers_drop_short);
286DEBUGFS_STATS_FILE(rx_handlers_drop_passive_scan, 20, "%u",
287 local->rx_handlers_drop_passive_scan);
288DEBUGFS_STATS_FILE(tx_expand_skb_head, 20, "%u",
289 local->tx_expand_skb_head);
290DEBUGFS_STATS_FILE(tx_expand_skb_head_cloned, 20, "%u",
291 local->tx_expand_skb_head_cloned);
292DEBUGFS_STATS_FILE(rx_expand_skb_head, 20, "%u",
293 local->rx_expand_skb_head);
294DEBUGFS_STATS_FILE(rx_expand_skb_head2, 20, "%u",
295 local->rx_expand_skb_head2);
296DEBUGFS_STATS_FILE(rx_handlers_fragments, 20, "%u",
297 local->rx_handlers_fragments);
298DEBUGFS_STATS_FILE(tx_status_drop, 20, "%u",
299 local->tx_status_drop);
300
301#endif
302
303DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
304DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
305DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
306DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
307
308
309void debugfs_hw_add(struct ieee80211_local *local)
310{
311 struct dentry *phyd = local->hw.wiphy->debugfsdir;
312 struct dentry *statsd;
313
314 if (!phyd)
315 return;
316
317 local->debugfs.stations = debugfs_create_dir("stations", phyd);
318 local->debugfs.keys = debugfs_create_dir("keys", phyd);
319
320 DEBUGFS_ADD(frequency);
321 DEBUGFS_ADD(total_ps_buffered);
322 DEBUGFS_ADD(wep_iv);
323 DEBUGFS_ADD(tsf);
324 DEBUGFS_ADD(queues);
325 DEBUGFS_ADD_MODE(reset, 0200);
326 DEBUGFS_ADD(noack);
327
328 statsd = debugfs_create_dir("statistics", phyd);
329 local->debugfs.statistics = statsd;
330
331 /* if the dir failed, don't put all the other things into the root! */
332 if (!statsd)
333 return;
334
335 DEBUGFS_STATS_ADD(transmitted_fragment_count);
336 DEBUGFS_STATS_ADD(multicast_transmitted_frame_count);
337 DEBUGFS_STATS_ADD(failed_count);
338 DEBUGFS_STATS_ADD(retry_count);
339 DEBUGFS_STATS_ADD(multiple_retry_count);
340 DEBUGFS_STATS_ADD(frame_duplicate_count);
341 DEBUGFS_STATS_ADD(received_fragment_count);
342 DEBUGFS_STATS_ADD(multicast_received_frame_count);
343 DEBUGFS_STATS_ADD(transmitted_frame_count);
344#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
345 DEBUGFS_STATS_ADD(tx_handlers_drop);
346 DEBUGFS_STATS_ADD(tx_handlers_queued);
347 DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted);
348 DEBUGFS_STATS_ADD(tx_handlers_drop_fragment);
349 DEBUGFS_STATS_ADD(tx_handlers_drop_wep);
350 DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc);
351 DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port);
352 DEBUGFS_STATS_ADD(rx_handlers_drop);
353 DEBUGFS_STATS_ADD(rx_handlers_queued);
354 DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc);
355 DEBUGFS_STATS_ADD(rx_handlers_drop_defrag);
356 DEBUGFS_STATS_ADD(rx_handlers_drop_short);
357 DEBUGFS_STATS_ADD(rx_handlers_drop_passive_scan);
358 DEBUGFS_STATS_ADD(tx_expand_skb_head);
359 DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned);
360 DEBUGFS_STATS_ADD(rx_expand_skb_head);
361 DEBUGFS_STATS_ADD(rx_expand_skb_head2);
362 DEBUGFS_STATS_ADD(rx_handlers_fragments);
363 DEBUGFS_STATS_ADD(tx_status_drop);
364#endif
365 DEBUGFS_STATS_ADD(dot11ACKFailureCount);
366 DEBUGFS_STATS_ADD(dot11RTSFailureCount);
367 DEBUGFS_STATS_ADD(dot11FCSErrorCount);
368 DEBUGFS_STATS_ADD(dot11RTSSuccessCount);
369}
370
371void debugfs_hw_del(struct ieee80211_local *local)
372{
373 DEBUGFS_DEL(frequency);
374 DEBUGFS_DEL(total_ps_buffered);
375 DEBUGFS_DEL(wep_iv);
376 DEBUGFS_DEL(tsf);
377 DEBUGFS_DEL(queues);
378 DEBUGFS_DEL(reset);
379 DEBUGFS_DEL(noack);
380
381 DEBUGFS_STATS_DEL(transmitted_fragment_count);
382 DEBUGFS_STATS_DEL(multicast_transmitted_frame_count);
383 DEBUGFS_STATS_DEL(failed_count);
384 DEBUGFS_STATS_DEL(retry_count);
385 DEBUGFS_STATS_DEL(multiple_retry_count);
386 DEBUGFS_STATS_DEL(frame_duplicate_count);
387 DEBUGFS_STATS_DEL(received_fragment_count);
388 DEBUGFS_STATS_DEL(multicast_received_frame_count);
389 DEBUGFS_STATS_DEL(transmitted_frame_count);
390 DEBUGFS_STATS_DEL(num_scans);
391#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
392 DEBUGFS_STATS_DEL(tx_handlers_drop);
393 DEBUGFS_STATS_DEL(tx_handlers_queued);
394 DEBUGFS_STATS_DEL(tx_handlers_drop_unencrypted);
395 DEBUGFS_STATS_DEL(tx_handlers_drop_fragment);
396 DEBUGFS_STATS_DEL(tx_handlers_drop_wep);
397 DEBUGFS_STATS_DEL(tx_handlers_drop_not_assoc);
398 DEBUGFS_STATS_DEL(tx_handlers_drop_unauth_port);
399 DEBUGFS_STATS_DEL(rx_handlers_drop);
400 DEBUGFS_STATS_DEL(rx_handlers_queued);
401 DEBUGFS_STATS_DEL(rx_handlers_drop_nullfunc);
402 DEBUGFS_STATS_DEL(rx_handlers_drop_defrag);
403 DEBUGFS_STATS_DEL(rx_handlers_drop_short);
404 DEBUGFS_STATS_DEL(rx_handlers_drop_passive_scan);
405 DEBUGFS_STATS_DEL(tx_expand_skb_head);
406 DEBUGFS_STATS_DEL(tx_expand_skb_head_cloned);
407 DEBUGFS_STATS_DEL(rx_expand_skb_head);
408 DEBUGFS_STATS_DEL(rx_expand_skb_head2);
409 DEBUGFS_STATS_DEL(rx_handlers_fragments);
410 DEBUGFS_STATS_DEL(tx_status_drop);
411#endif
412 DEBUGFS_STATS_DEL(dot11ACKFailureCount);
413 DEBUGFS_STATS_DEL(dot11RTSFailureCount);
414 DEBUGFS_STATS_DEL(dot11FCSErrorCount);
415 DEBUGFS_STATS_DEL(dot11RTSSuccessCount);
416
417 debugfs_remove(local->debugfs.statistics);
418 local->debugfs.statistics = NULL;
419 debugfs_remove(local->debugfs.stations);
420 local->debugfs.stations = NULL;
421 debugfs_remove(local->debugfs.keys);
422 local->debugfs.keys = NULL;
423}