mac80211: add queue debugfs file
[linux-2.6.git] / net / mac80211 / debugfs.c
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
17 int 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...)              \
24 static 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                                                                         \
35 static 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
53 DEBUGFS_READONLY_FILE(frequency, 20, "%d",
54                       local->hw.conf.channel->center_freq);
55 DEBUGFS_READONLY_FILE(total_ps_buffered, 20, "%d",
56                       local->total_ps_buffered);
57 DEBUGFS_READONLY_FILE(wep_iv, 20, "%#08x",
58                       local->wep_iv & 0xffffff);
59 DEBUGFS_READONLY_FILE(rate_ctrl_alg, 100, "%s",
60                       local->rate_ctrl ? local->rate_ctrl->ops->name : "<unset>");
61
62 static 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
76 static 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
106 static const struct file_operations tsf_ops = {
107         .read = tsf_read,
108         .write = tsf_write,
109         .open = mac80211_open_file_generic
110 };
111
112 static 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
125 static const struct file_operations reset_ops = {
126         .write = reset_write,
127         .open = mac80211_open_file_generic,
128 };
129
130 static 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
142 static 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
160 static const struct file_operations noack_ops = {
161         .read = noack_read,
162         .write = noack_write,
163         .open = mac80211_open_file_generic
164 };
165
166 static 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                                 __netif_subqueue_stopped(local->mdev, 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
184 static 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
194 static 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)                                     \
214 static 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 }                                                                       \
219 static 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                                                                         \
230 static 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
243 DEBUGFS_STATS_FILE(transmitted_fragment_count, 20, "%u",
244                    local->dot11TransmittedFragmentCount);
245 DEBUGFS_STATS_FILE(multicast_transmitted_frame_count, 20, "%u",
246                    local->dot11MulticastTransmittedFrameCount);
247 DEBUGFS_STATS_FILE(failed_count, 20, "%u",
248                    local->dot11FailedCount);
249 DEBUGFS_STATS_FILE(retry_count, 20, "%u",
250                    local->dot11RetryCount);
251 DEBUGFS_STATS_FILE(multiple_retry_count, 20, "%u",
252                    local->dot11MultipleRetryCount);
253 DEBUGFS_STATS_FILE(frame_duplicate_count, 20, "%u",
254                    local->dot11FrameDuplicateCount);
255 DEBUGFS_STATS_FILE(received_fragment_count, 20, "%u",
256                    local->dot11ReceivedFragmentCount);
257 DEBUGFS_STATS_FILE(multicast_received_frame_count, 20, "%u",
258                    local->dot11MulticastReceivedFrameCount);
259 DEBUGFS_STATS_FILE(transmitted_frame_count, 20, "%u",
260                    local->dot11TransmittedFrameCount);
261 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
262 DEBUGFS_STATS_FILE(tx_handlers_drop, 20, "%u",
263                    local->tx_handlers_drop);
264 DEBUGFS_STATS_FILE(tx_handlers_queued, 20, "%u",
265                    local->tx_handlers_queued);
266 DEBUGFS_STATS_FILE(tx_handlers_drop_unencrypted, 20, "%u",
267                    local->tx_handlers_drop_unencrypted);
268 DEBUGFS_STATS_FILE(tx_handlers_drop_fragment, 20, "%u",
269                    local->tx_handlers_drop_fragment);
270 DEBUGFS_STATS_FILE(tx_handlers_drop_wep, 20, "%u",
271                    local->tx_handlers_drop_wep);
272 DEBUGFS_STATS_FILE(tx_handlers_drop_not_assoc, 20, "%u",
273                    local->tx_handlers_drop_not_assoc);
274 DEBUGFS_STATS_FILE(tx_handlers_drop_unauth_port, 20, "%u",
275                    local->tx_handlers_drop_unauth_port);
276 DEBUGFS_STATS_FILE(rx_handlers_drop, 20, "%u",
277                    local->rx_handlers_drop);
278 DEBUGFS_STATS_FILE(rx_handlers_queued, 20, "%u",
279                    local->rx_handlers_queued);
280 DEBUGFS_STATS_FILE(rx_handlers_drop_nullfunc, 20, "%u",
281                    local->rx_handlers_drop_nullfunc);
282 DEBUGFS_STATS_FILE(rx_handlers_drop_defrag, 20, "%u",
283                    local->rx_handlers_drop_defrag);
284 DEBUGFS_STATS_FILE(rx_handlers_drop_short, 20, "%u",
285                    local->rx_handlers_drop_short);
286 DEBUGFS_STATS_FILE(rx_handlers_drop_passive_scan, 20, "%u",
287                    local->rx_handlers_drop_passive_scan);
288 DEBUGFS_STATS_FILE(tx_expand_skb_head, 20, "%u",
289                    local->tx_expand_skb_head);
290 DEBUGFS_STATS_FILE(tx_expand_skb_head_cloned, 20, "%u",
291                    local->tx_expand_skb_head_cloned);
292 DEBUGFS_STATS_FILE(rx_expand_skb_head, 20, "%u",
293                    local->rx_expand_skb_head);
294 DEBUGFS_STATS_FILE(rx_expand_skb_head2, 20, "%u",
295                    local->rx_expand_skb_head2);
296 DEBUGFS_STATS_FILE(rx_handlers_fragments, 20, "%u",
297                    local->rx_handlers_fragments);
298 DEBUGFS_STATS_FILE(tx_status_drop, 20, "%u",
299                    local->tx_status_drop);
300
301 #endif
302
303 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
304 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
305 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
306 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
307
308
309 void 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
371 void 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 }