simple_open: automatically convert to simple_open()
[linux-2.6.git] / net / mac80211 / debugfs.c
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
18 #define DEBUGFS_FORMAT_BUFFER_SIZE 100
19
20 int mac80211_format_buffer(char __user *userbuf, size_t count,
21                                   loff_t *ppos, char *fmt, ...)
22 {
23         va_list args;
24         char buf[DEBUGFS_FORMAT_BUFFER_SIZE];
25         int res;
26
27         va_start(args, fmt);
28         res = vscnprintf(buf, sizeof(buf), fmt, args);
29         va_end(args);
30
31         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
32 }
33
34 #define DEBUGFS_READONLY_FILE_FN(name, fmt, value...)                   \
35 static ssize_t name## _read(struct file *file, char __user *userbuf,    \
36                             size_t count, loff_t *ppos)                 \
37 {                                                                       \
38         struct ieee80211_local *local = file->private_data;             \
39                                                                         \
40         return mac80211_format_buffer(userbuf, count, ppos,             \
41                                       fmt "\n", ##value);               \
42 }
43
44 #define DEBUGFS_READONLY_FILE_OPS(name)                 \
45 static const struct file_operations name## _ops = {                     \
46         .read = name## _read,                                           \
47         .open = simple_open,                                            \
48         .llseek = generic_file_llseek,                                  \
49 };
50
51 #define DEBUGFS_READONLY_FILE(name, fmt, value...)              \
52         DEBUGFS_READONLY_FILE_FN(name, fmt, value)              \
53         DEBUGFS_READONLY_FILE_OPS(name)
54
55 #define DEBUGFS_ADD(name)                                               \
56         debugfs_create_file(#name, 0400, phyd, local, &name## _ops);
57
58 #define DEBUGFS_ADD_MODE(name, mode)                                    \
59         debugfs_create_file(#name, mode, phyd, local, &name## _ops);
60
61
62 DEBUGFS_READONLY_FILE(user_power, "%d",
63                       local->user_power_level);
64 DEBUGFS_READONLY_FILE(power, "%d",
65                       local->hw.conf.power_level);
66 DEBUGFS_READONLY_FILE(frequency, "%d",
67                       local->hw.conf.channel->center_freq);
68 DEBUGFS_READONLY_FILE(total_ps_buffered, "%d",
69                       local->total_ps_buffered);
70 DEBUGFS_READONLY_FILE(wep_iv, "%#08x",
71                       local->wep_iv & 0xffffff);
72 DEBUGFS_READONLY_FILE(rate_ctrl_alg, "%s",
73         local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver");
74
75 static ssize_t reset_write(struct file *file, const char __user *user_buf,
76                            size_t count, loff_t *ppos)
77 {
78         struct ieee80211_local *local = file->private_data;
79
80         rtnl_lock();
81         __ieee80211_suspend(&local->hw, NULL);
82         __ieee80211_resume(&local->hw);
83         rtnl_unlock();
84
85         return count;
86 }
87
88 static const struct file_operations reset_ops = {
89         .write = reset_write,
90         .open = simple_open,
91         .llseek = noop_llseek,
92 };
93
94 static ssize_t channel_type_read(struct file *file, char __user *user_buf,
95                        size_t count, loff_t *ppos)
96 {
97         struct ieee80211_local *local = file->private_data;
98         const char *buf;
99
100         switch (local->hw.conf.channel_type) {
101         case NL80211_CHAN_NO_HT:
102                 buf = "no ht\n";
103                 break;
104         case NL80211_CHAN_HT20:
105                 buf = "ht20\n";
106                 break;
107         case NL80211_CHAN_HT40MINUS:
108                 buf = "ht40-\n";
109                 break;
110         case NL80211_CHAN_HT40PLUS:
111                 buf = "ht40+\n";
112                 break;
113         default:
114                 buf = "???";
115                 break;
116         }
117
118         return simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
119 }
120
121 static ssize_t hwflags_read(struct file *file, char __user *user_buf,
122                             size_t count, loff_t *ppos)
123 {
124         struct ieee80211_local *local = file->private_data;
125         int mxln = 500;
126         ssize_t rv;
127         char *buf = kzalloc(mxln, GFP_KERNEL);
128         int sf = 0; /* how many written so far */
129
130         if (!buf)
131                 return 0;
132
133         sf += snprintf(buf, mxln - sf, "0x%x\n", local->hw.flags);
134         if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)
135                 sf += snprintf(buf + sf, mxln - sf, "HAS_RATE_CONTROL\n");
136         if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS)
137                 sf += snprintf(buf + sf, mxln - sf, "RX_INCLUDES_FCS\n");
138         if (local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING)
139                 sf += snprintf(buf + sf, mxln - sf,
140                                "HOST_BCAST_PS_BUFFERING\n");
141         if (local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)
142                 sf += snprintf(buf + sf, mxln - sf,
143                                "2GHZ_SHORT_SLOT_INCAPABLE\n");
144         if (local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)
145                 sf += snprintf(buf + sf, mxln - sf,
146                                "2GHZ_SHORT_PREAMBLE_INCAPABLE\n");
147         if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
148                 sf += snprintf(buf + sf, mxln - sf, "SIGNAL_UNSPEC\n");
149         if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
150                 sf += snprintf(buf + sf, mxln - sf, "SIGNAL_DBM\n");
151         if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
152                 sf += snprintf(buf + sf, mxln - sf, "NEED_DTIM_PERIOD\n");
153         if (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)
154                 sf += snprintf(buf + sf, mxln - sf, "SPECTRUM_MGMT\n");
155         if (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION)
156                 sf += snprintf(buf + sf, mxln - sf, "AMPDU_AGGREGATION\n");
157         if (local->hw.flags & IEEE80211_HW_SUPPORTS_PS)
158                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_PS\n");
159         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
160                 sf += snprintf(buf + sf, mxln - sf, "PS_NULLFUNC_STACK\n");
161         if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)
162                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_DYNAMIC_PS\n");
163         if (local->hw.flags & IEEE80211_HW_MFP_CAPABLE)
164                 sf += snprintf(buf + sf, mxln - sf, "MFP_CAPABLE\n");
165         if (local->hw.flags & IEEE80211_HW_SUPPORTS_STATIC_SMPS)
166                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_STATIC_SMPS\n");
167         if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
168                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_DYNAMIC_SMPS\n");
169         if (local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
170                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_UAPSD\n");
171         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
172                 sf += snprintf(buf + sf, mxln - sf, "REPORTS_TX_ACK_STATUS\n");
173         if (local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
174                 sf += snprintf(buf + sf, mxln - sf, "CONNECTION_MONITOR\n");
175         if (local->hw.flags & IEEE80211_HW_SUPPORTS_PER_STA_GTK)
176                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_PER_STA_GTK\n");
177         if (local->hw.flags & IEEE80211_HW_AP_LINK_PS)
178                 sf += snprintf(buf + sf, mxln - sf, "AP_LINK_PS\n");
179         if (local->hw.flags & IEEE80211_HW_TX_AMPDU_SETUP_IN_HW)
180                 sf += snprintf(buf + sf, mxln - sf, "TX_AMPDU_SETUP_IN_HW\n");
181         if (local->hw.flags & IEEE80211_HW_SCAN_WHILE_IDLE)
182                 sf += snprintf(buf + sf, mxln - sf, "SCAN_WHILE_IDLE\n");
183
184         rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
185         kfree(buf);
186         return rv;
187 }
188
189 static ssize_t queues_read(struct file *file, char __user *user_buf,
190                            size_t count, loff_t *ppos)
191 {
192         struct ieee80211_local *local = file->private_data;
193         unsigned long flags;
194         char buf[IEEE80211_MAX_QUEUES * 20];
195         int q, res = 0;
196
197         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
198         for (q = 0; q < local->hw.queues; q++)
199                 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,
200                                 local->queue_stop_reasons[q],
201                                 skb_queue_len(&local->pending[q]));
202         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
203
204         return simple_read_from_buffer(user_buf, count, ppos, buf, res);
205 }
206
207 DEBUGFS_READONLY_FILE_OPS(hwflags);
208 DEBUGFS_READONLY_FILE_OPS(channel_type);
209 DEBUGFS_READONLY_FILE_OPS(queues);
210
211 /* statistics stuff */
212
213 static ssize_t format_devstat_counter(struct ieee80211_local *local,
214         char __user *userbuf,
215         size_t count, loff_t *ppos,
216         int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
217                           int buflen))
218 {
219         struct ieee80211_low_level_stats stats;
220         char buf[20];
221         int res;
222
223         rtnl_lock();
224         res = drv_get_stats(local, &stats);
225         rtnl_unlock();
226         if (res)
227                 return res;
228         res = printvalue(&stats, buf, sizeof(buf));
229         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
230 }
231
232 #define DEBUGFS_DEVSTATS_FILE(name)                                     \
233 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
234                                  char *buf, int buflen)                 \
235 {                                                                       \
236         return scnprintf(buf, buflen, "%u\n", stats->name);             \
237 }                                                                       \
238 static ssize_t stats_ ##name## _read(struct file *file,                 \
239                                      char __user *userbuf,              \
240                                      size_t count, loff_t *ppos)        \
241 {                                                                       \
242         return format_devstat_counter(file->private_data,               \
243                                       userbuf,                          \
244                                       count,                            \
245                                       ppos,                             \
246                                       print_devstats_##name);           \
247 }                                                                       \
248                                                                         \
249 static const struct file_operations stats_ ##name## _ops = {            \
250         .read = stats_ ##name## _read,                                  \
251         .open = simple_open,                                            \
252         .llseek = generic_file_llseek,                                  \
253 };
254
255 #define DEBUGFS_STATS_ADD(name, field)                                  \
256         debugfs_create_u32(#name, 0400, statsd, (u32 *) &field);
257 #define DEBUGFS_DEVSTATS_ADD(name)                                      \
258         debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops);
259
260 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
261 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
262 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
263 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
264
265 void debugfs_hw_add(struct ieee80211_local *local)
266 {
267         struct dentry *phyd = local->hw.wiphy->debugfsdir;
268         struct dentry *statsd;
269
270         if (!phyd)
271                 return;
272
273         local->debugfs.keys = debugfs_create_dir("keys", phyd);
274
275         DEBUGFS_ADD(frequency);
276         DEBUGFS_ADD(total_ps_buffered);
277         DEBUGFS_ADD(wep_iv);
278         DEBUGFS_ADD(queues);
279         DEBUGFS_ADD_MODE(reset, 0200);
280         DEBUGFS_ADD(channel_type);
281         DEBUGFS_ADD(hwflags);
282         DEBUGFS_ADD(user_power);
283         DEBUGFS_ADD(power);
284
285         statsd = debugfs_create_dir("statistics", phyd);
286
287         /* if the dir failed, don't put all the other things into the root! */
288         if (!statsd)
289                 return;
290
291         DEBUGFS_STATS_ADD(transmitted_fragment_count,
292                 local->dot11TransmittedFragmentCount);
293         DEBUGFS_STATS_ADD(multicast_transmitted_frame_count,
294                 local->dot11MulticastTransmittedFrameCount);
295         DEBUGFS_STATS_ADD(failed_count, local->dot11FailedCount);
296         DEBUGFS_STATS_ADD(retry_count, local->dot11RetryCount);
297         DEBUGFS_STATS_ADD(multiple_retry_count,
298                 local->dot11MultipleRetryCount);
299         DEBUGFS_STATS_ADD(frame_duplicate_count,
300                 local->dot11FrameDuplicateCount);
301         DEBUGFS_STATS_ADD(received_fragment_count,
302                 local->dot11ReceivedFragmentCount);
303         DEBUGFS_STATS_ADD(multicast_received_frame_count,
304                 local->dot11MulticastReceivedFrameCount);
305         DEBUGFS_STATS_ADD(transmitted_frame_count,
306                 local->dot11TransmittedFrameCount);
307 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
308         DEBUGFS_STATS_ADD(tx_handlers_drop, local->tx_handlers_drop);
309         DEBUGFS_STATS_ADD(tx_handlers_queued, local->tx_handlers_queued);
310         DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted,
311                 local->tx_handlers_drop_unencrypted);
312         DEBUGFS_STATS_ADD(tx_handlers_drop_fragment,
313                 local->tx_handlers_drop_fragment);
314         DEBUGFS_STATS_ADD(tx_handlers_drop_wep,
315                 local->tx_handlers_drop_wep);
316         DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc,
317                 local->tx_handlers_drop_not_assoc);
318         DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port,
319                 local->tx_handlers_drop_unauth_port);
320         DEBUGFS_STATS_ADD(rx_handlers_drop, local->rx_handlers_drop);
321         DEBUGFS_STATS_ADD(rx_handlers_queued, local->rx_handlers_queued);
322         DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc,
323                 local->rx_handlers_drop_nullfunc);
324         DEBUGFS_STATS_ADD(rx_handlers_drop_defrag,
325                 local->rx_handlers_drop_defrag);
326         DEBUGFS_STATS_ADD(rx_handlers_drop_short,
327                 local->rx_handlers_drop_short);
328         DEBUGFS_STATS_ADD(rx_handlers_drop_passive_scan,
329                 local->rx_handlers_drop_passive_scan);
330         DEBUGFS_STATS_ADD(tx_expand_skb_head,
331                 local->tx_expand_skb_head);
332         DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned,
333                 local->tx_expand_skb_head_cloned);
334         DEBUGFS_STATS_ADD(rx_expand_skb_head,
335                 local->rx_expand_skb_head);
336         DEBUGFS_STATS_ADD(rx_expand_skb_head2,
337                 local->rx_expand_skb_head2);
338         DEBUGFS_STATS_ADD(rx_handlers_fragments,
339                 local->rx_handlers_fragments);
340         DEBUGFS_STATS_ADD(tx_status_drop,
341                 local->tx_status_drop);
342 #endif
343         DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount);
344         DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount);
345         DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount);
346         DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount);
347 }