Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1
2/*
3 * mac80211 debugfs for wireless PHYs
4 *
5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
6 *
7 * GPLv2
8 *
9 */
10
11#include <linux/debugfs.h>
12#include <linux/rtnetlink.h>
13#include "ieee80211_i.h"
14#include "driver-ops.h"
15#include "rate.h"
16#include "debugfs.h"
17
18int mac80211_open_file_generic(struct inode *inode, struct file *file)
19{
20 file->private_data = inode->i_private;
21 return 0;
22}
23
24#define DEBUGFS_READONLY_FILE(name, buflen, fmt, value...) \
25static ssize_t name## _read(struct file *file, char __user *userbuf, \
26 size_t count, loff_t *ppos) \
27{ \
28 struct ieee80211_local *local = file->private_data; \
29 char buf[buflen]; \
30 int res; \
31 \
32 res = scnprintf(buf, buflen, fmt "\n", ##value); \
33 return simple_read_from_buffer(userbuf, count, ppos, buf, res); \
34} \
35 \
36static const struct file_operations name## _ops = { \
37 .read = name## _read, \
38 .open = mac80211_open_file_generic, \
39};
40
41#define DEBUGFS_ADD(name) \
42 debugfs_create_file(#name, 0400, phyd, local, &name## _ops);
43
44#define DEBUGFS_ADD_MODE(name, mode) \
45 debugfs_create_file(#name, mode, phyd, local, &name## _ops);
46
47
48DEBUGFS_READONLY_FILE(frequency, 20, "%d",
49 local->hw.conf.channel->center_freq);
50DEBUGFS_READONLY_FILE(total_ps_buffered, 20, "%d",
51 local->total_ps_buffered);
52DEBUGFS_READONLY_FILE(wep_iv, 20, "%#08x",
53 local->wep_iv & 0xffffff);
54DEBUGFS_READONLY_FILE(rate_ctrl_alg, 100, "%s",
55 local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver");
56
57static ssize_t tsf_read(struct file *file, char __user *user_buf,
58 size_t count, loff_t *ppos)
59{
60 struct ieee80211_local *local = file->private_data;
61 u64 tsf;
62 char buf[100];
63
64 tsf = drv_get_tsf(local);
65
66 snprintf(buf, sizeof(buf), "0x%016llx\n", (unsigned long long) tsf);
67
68 return simple_read_from_buffer(user_buf, count, ppos, buf, 19);
69}
70
71static ssize_t tsf_write(struct file *file,
72 const char __user *user_buf,
73 size_t count, loff_t *ppos)
74{
75 struct ieee80211_local *local = file->private_data;
76 unsigned long long tsf;
77 char buf[100];
78 size_t len;
79
80 len = min(count, sizeof(buf) - 1);
81 if (copy_from_user(buf, user_buf, len))
82 return -EFAULT;
83 buf[len] = '\0';
84
85 if (strncmp(buf, "reset", 5) == 0) {
86 if (local->ops->reset_tsf) {
87 drv_reset_tsf(local);
88 printk(KERN_INFO "%s: debugfs reset TSF\n", wiphy_name(local->hw.wiphy));
89 }
90 } else {
91 tsf = simple_strtoul(buf, NULL, 0);
92 if (local->ops->set_tsf) {
93 drv_set_tsf(local, tsf);
94 printk(KERN_INFO "%s: debugfs set TSF to %#018llx\n", wiphy_name(local->hw.wiphy), tsf);
95 }
96 }
97
98 return count;
99}
100
101static const struct file_operations tsf_ops = {
102 .read = tsf_read,
103 .write = tsf_write,
104 .open = mac80211_open_file_generic
105};
106
107static ssize_t reset_write(struct file *file, const char __user *user_buf,
108 size_t count, loff_t *ppos)
109{
110 struct ieee80211_local *local = file->private_data;
111
112 rtnl_lock();
113 __ieee80211_suspend(&local->hw);
114 __ieee80211_resume(&local->hw);
115 rtnl_unlock();
116
117 return count;
118}
119
120static const struct file_operations reset_ops = {
121 .write = reset_write,
122 .open = mac80211_open_file_generic,
123};
124
125static ssize_t noack_read(struct file *file, char __user *user_buf,
126 size_t count, loff_t *ppos)
127{
128 struct ieee80211_local *local = file->private_data;
129 int res;
130 char buf[10];
131
132 res = scnprintf(buf, sizeof(buf), "%d\n", local->wifi_wme_noack_test);
133
134 return simple_read_from_buffer(user_buf, count, ppos, buf, res);
135}
136
137static ssize_t noack_write(struct file *file,
138 const char __user *user_buf,
139 size_t count, loff_t *ppos)
140{
141 struct ieee80211_local *local = file->private_data;
142 char buf[10];
143 size_t len;
144
145 len = min(count, sizeof(buf) - 1);
146 if (copy_from_user(buf, user_buf, len))
147 return -EFAULT;
148 buf[len] = '\0';
149
150 local->wifi_wme_noack_test = !!simple_strtoul(buf, NULL, 0);
151
152 return count;
153}
154
155static const struct file_operations noack_ops = {
156 .read = noack_read,
157 .write = noack_write,
158 .open = mac80211_open_file_generic
159};
160
161static ssize_t queues_read(struct file *file, char __user *user_buf,
162 size_t count, loff_t *ppos)
163{
164 struct ieee80211_local *local = file->private_data;
165 unsigned long flags;
166 char buf[IEEE80211_MAX_QUEUES * 20];
167 int q, res = 0;
168
169 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
170 for (q = 0; q < local->hw.queues; q++)
171 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,
172 local->queue_stop_reasons[q],
173 skb_queue_len(&local->pending[q]));
174 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
175
176 return simple_read_from_buffer(user_buf, count, ppos, buf, res);
177}
178
179static const struct file_operations queues_ops = {
180 .read = queues_read,
181 .open = mac80211_open_file_generic
182};
183
184/* statistics stuff */
185
186#define DEBUGFS_STATS_FILE(name, buflen, fmt, value...) \
187 DEBUGFS_READONLY_FILE(stats_ ##name, buflen, fmt, ##value)
188
189static ssize_t format_devstat_counter(struct ieee80211_local *local,
190 char __user *userbuf,
191 size_t count, loff_t *ppos,
192 int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
193 int buflen))
194{
195 struct ieee80211_low_level_stats stats;
196 char buf[20];
197 int res;
198
199 rtnl_lock();
200 res = drv_get_stats(local, &stats);
201 rtnl_unlock();
202 if (res)
203 return res;
204 res = printvalue(&stats, buf, sizeof(buf));
205 return simple_read_from_buffer(userbuf, count, ppos, buf, res);
206}
207
208#define DEBUGFS_DEVSTATS_FILE(name) \
209static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
210 char *buf, int buflen) \
211{ \
212 return scnprintf(buf, buflen, "%u\n", stats->name); \
213} \
214static ssize_t stats_ ##name## _read(struct file *file, \
215 char __user *userbuf, \
216 size_t count, loff_t *ppos) \
217{ \
218 return format_devstat_counter(file->private_data, \
219 userbuf, \
220 count, \
221 ppos, \
222 print_devstats_##name); \
223} \
224 \
225static const struct file_operations stats_ ##name## _ops = { \
226 .read = stats_ ##name## _read, \
227 .open = mac80211_open_file_generic, \
228};
229
230#define DEBUGFS_STATS_ADD(name) \
231 debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops);
232
233DEBUGFS_STATS_FILE(transmitted_fragment_count, 20, "%u",
234 local->dot11TransmittedFragmentCount);
235DEBUGFS_STATS_FILE(multicast_transmitted_frame_count, 20, "%u",
236 local->dot11MulticastTransmittedFrameCount);
237DEBUGFS_STATS_FILE(failed_count, 20, "%u",
238 local->dot11FailedCount);
239DEBUGFS_STATS_FILE(retry_count, 20, "%u",
240 local->dot11RetryCount);
241DEBUGFS_STATS_FILE(multiple_retry_count, 20, "%u",
242 local->dot11MultipleRetryCount);
243DEBUGFS_STATS_FILE(frame_duplicate_count, 20, "%u",
244 local->dot11FrameDuplicateCount);
245DEBUGFS_STATS_FILE(received_fragment_count, 20, "%u",
246 local->dot11ReceivedFragmentCount);
247DEBUGFS_STATS_FILE(multicast_received_frame_count, 20, "%u",
248 local->dot11MulticastReceivedFrameCount);
249DEBUGFS_STATS_FILE(transmitted_frame_count, 20, "%u",
250 local->dot11TransmittedFrameCount);
251#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
252DEBUGFS_STATS_FILE(tx_handlers_drop, 20, "%u",
253 local->tx_handlers_drop);
254DEBUGFS_STATS_FILE(tx_handlers_queued, 20, "%u",
255 local->tx_handlers_queued);
256DEBUGFS_STATS_FILE(tx_handlers_drop_unencrypted, 20, "%u",
257 local->tx_handlers_drop_unencrypted);
258DEBUGFS_STATS_FILE(tx_handlers_drop_fragment, 20, "%u",
259 local->tx_handlers_drop_fragment);
260DEBUGFS_STATS_FILE(tx_handlers_drop_wep, 20, "%u",
261 local->tx_handlers_drop_wep);
262DEBUGFS_STATS_FILE(tx_handlers_drop_not_assoc, 20, "%u",
263 local->tx_handlers_drop_not_assoc);
264DEBUGFS_STATS_FILE(tx_handlers_drop_unauth_port, 20, "%u",
265 local->tx_handlers_drop_unauth_port);
266DEBUGFS_STATS_FILE(rx_handlers_drop, 20, "%u",
267 local->rx_handlers_drop);
268DEBUGFS_STATS_FILE(rx_handlers_queued, 20, "%u",
269 local->rx_handlers_queued);
270DEBUGFS_STATS_FILE(rx_handlers_drop_nullfunc, 20, "%u",
271 local->rx_handlers_drop_nullfunc);
272DEBUGFS_STATS_FILE(rx_handlers_drop_defrag, 20, "%u",
273 local->rx_handlers_drop_defrag);
274DEBUGFS_STATS_FILE(rx_handlers_drop_short, 20, "%u",
275 local->rx_handlers_drop_short);
276DEBUGFS_STATS_FILE(rx_handlers_drop_passive_scan, 20, "%u",
277 local->rx_handlers_drop_passive_scan);
278DEBUGFS_STATS_FILE(tx_expand_skb_head, 20, "%u",
279 local->tx_expand_skb_head);
280DEBUGFS_STATS_FILE(tx_expand_skb_head_cloned, 20, "%u",
281 local->tx_expand_skb_head_cloned);
282DEBUGFS_STATS_FILE(rx_expand_skb_head, 20, "%u",
283 local->rx_expand_skb_head);
284DEBUGFS_STATS_FILE(rx_expand_skb_head2, 20, "%u",
285 local->rx_expand_skb_head2);
286DEBUGFS_STATS_FILE(rx_handlers_fragments, 20, "%u",
287 local->rx_handlers_fragments);
288DEBUGFS_STATS_FILE(tx_status_drop, 20, "%u",
289 local->tx_status_drop);
290
291#endif
292
293DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
294DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
295DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
296DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
297
298
299void debugfs_hw_add(struct ieee80211_local *local)
300{
301 struct dentry *phyd = local->hw.wiphy->debugfsdir;
302 struct dentry *statsd;
303
304 if (!phyd)
305 return;
306
307 local->debugfs.stations = debugfs_create_dir("stations", phyd);
308 local->debugfs.keys = debugfs_create_dir("keys", phyd);
309
310 DEBUGFS_ADD(frequency);
311 DEBUGFS_ADD(total_ps_buffered);
312 DEBUGFS_ADD(wep_iv);
313 DEBUGFS_ADD(tsf);
314 DEBUGFS_ADD(queues);
315 DEBUGFS_ADD_MODE(reset, 0200);
316 DEBUGFS_ADD(noack);
317
318 statsd = debugfs_create_dir("statistics", phyd);
319
320 /* if the dir failed, don't put all the other things into the root! */
321 if (!statsd)
322 return;
323
324 DEBUGFS_STATS_ADD(transmitted_fragment_count);
325 DEBUGFS_STATS_ADD(multicast_transmitted_frame_count);
326 DEBUGFS_STATS_ADD(failed_count);
327 DEBUGFS_STATS_ADD(retry_count);
328 DEBUGFS_STATS_ADD(multiple_retry_count);
329 DEBUGFS_STATS_ADD(frame_duplicate_count);
330 DEBUGFS_STATS_ADD(received_fragment_count);
331 DEBUGFS_STATS_ADD(multicast_received_frame_count);
332 DEBUGFS_STATS_ADD(transmitted_frame_count);
333#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
334 DEBUGFS_STATS_ADD(tx_handlers_drop);
335 DEBUGFS_STATS_ADD(tx_handlers_queued);
336 DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted);
337 DEBUGFS_STATS_ADD(tx_handlers_drop_fragment);
338 DEBUGFS_STATS_ADD(tx_handlers_drop_wep);
339 DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc);
340 DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port);
341 DEBUGFS_STATS_ADD(rx_handlers_drop);
342 DEBUGFS_STATS_ADD(rx_handlers_queued);
343 DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc);
344 DEBUGFS_STATS_ADD(rx_handlers_drop_defrag);
345 DEBUGFS_STATS_ADD(rx_handlers_drop_short);
346 DEBUGFS_STATS_ADD(rx_handlers_drop_passive_scan);
347 DEBUGFS_STATS_ADD(tx_expand_skb_head);
348 DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned);
349 DEBUGFS_STATS_ADD(rx_expand_skb_head);
350 DEBUGFS_STATS_ADD(rx_expand_skb_head2);
351 DEBUGFS_STATS_ADD(rx_handlers_fragments);
352 DEBUGFS_STATS_ADD(tx_status_drop);
353#endif
354 DEBUGFS_STATS_ADD(dot11ACKFailureCount);
355 DEBUGFS_STATS_ADD(dot11RTSFailureCount);
356 DEBUGFS_STATS_ADD(dot11FCSErrorCount);
357 DEBUGFS_STATS_ADD(dot11RTSSuccessCount);
358}