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debugfs.c
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1 
2 /*
3  * mac80211 debugfs for wireless PHYs
4  *
5  * Copyright 2007 Johannes Berg <[email protected]>
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(total_ps_buffered, "%d",
67  local->total_ps_buffered);
68 DEBUGFS_READONLY_FILE(wep_iv, "%#08x",
69  local->wep_iv & 0xffffff);
70 DEBUGFS_READONLY_FILE(rate_ctrl_alg, "%s",
71  local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver");
72 
73 #ifdef CONFIG_PM
74 static ssize_t reset_write(struct file *file, const char __user *user_buf,
75  size_t count, loff_t *ppos)
76 {
77  struct ieee80211_local *local = file->private_data;
78 
79  rtnl_lock();
80  __ieee80211_suspend(&local->hw, NULL);
81  __ieee80211_resume(&local->hw);
82  rtnl_unlock();
83 
84  return count;
85 }
86 
87 static const struct file_operations reset_ops = {
88  .write = reset_write,
89  .open = simple_open,
90  .llseek = noop_llseek,
91 };
92 #endif
93 
94 static ssize_t hwflags_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  int mxln = 500;
99  ssize_t rv;
100  char *buf = kzalloc(mxln, GFP_KERNEL);
101  int sf = 0; /* how many written so far */
102 
103  if (!buf)
104  return 0;
105 
106  sf += snprintf(buf, mxln - sf, "0x%x\n", local->hw.flags);
107  if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)
108  sf += snprintf(buf + sf, mxln - sf, "HAS_RATE_CONTROL\n");
109  if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS)
110  sf += snprintf(buf + sf, mxln - sf, "RX_INCLUDES_FCS\n");
111  if (local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING)
112  sf += snprintf(buf + sf, mxln - sf,
113  "HOST_BCAST_PS_BUFFERING\n");
114  if (local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)
115  sf += snprintf(buf + sf, mxln - sf,
116  "2GHZ_SHORT_SLOT_INCAPABLE\n");
117  if (local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)
118  sf += snprintf(buf + sf, mxln - sf,
119  "2GHZ_SHORT_PREAMBLE_INCAPABLE\n");
120  if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
121  sf += snprintf(buf + sf, mxln - sf, "SIGNAL_UNSPEC\n");
122  if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
123  sf += snprintf(buf + sf, mxln - sf, "SIGNAL_DBM\n");
124  if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
125  sf += snprintf(buf + sf, mxln - sf, "NEED_DTIM_PERIOD\n");
126  if (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)
127  sf += snprintf(buf + sf, mxln - sf, "SPECTRUM_MGMT\n");
128  if (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION)
129  sf += snprintf(buf + sf, mxln - sf, "AMPDU_AGGREGATION\n");
130  if (local->hw.flags & IEEE80211_HW_SUPPORTS_PS)
131  sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_PS\n");
132  if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
133  sf += snprintf(buf + sf, mxln - sf, "PS_NULLFUNC_STACK\n");
134  if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)
135  sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_DYNAMIC_PS\n");
136  if (local->hw.flags & IEEE80211_HW_MFP_CAPABLE)
137  sf += snprintf(buf + sf, mxln - sf, "MFP_CAPABLE\n");
138  if (local->hw.flags & IEEE80211_HW_SUPPORTS_STATIC_SMPS)
139  sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_STATIC_SMPS\n");
140  if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
141  sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_DYNAMIC_SMPS\n");
142  if (local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
143  sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_UAPSD\n");
144  if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
145  sf += snprintf(buf + sf, mxln - sf, "REPORTS_TX_ACK_STATUS\n");
146  if (local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
147  sf += snprintf(buf + sf, mxln - sf, "CONNECTION_MONITOR\n");
148  if (local->hw.flags & IEEE80211_HW_SUPPORTS_PER_STA_GTK)
149  sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_PER_STA_GTK\n");
150  if (local->hw.flags & IEEE80211_HW_AP_LINK_PS)
151  sf += snprintf(buf + sf, mxln - sf, "AP_LINK_PS\n");
152  if (local->hw.flags & IEEE80211_HW_TX_AMPDU_SETUP_IN_HW)
153  sf += snprintf(buf + sf, mxln - sf, "TX_AMPDU_SETUP_IN_HW\n");
154  if (local->hw.flags & IEEE80211_HW_SCAN_WHILE_IDLE)
155  sf += snprintf(buf + sf, mxln - sf, "SCAN_WHILE_IDLE\n");
156 
157  rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
158  kfree(buf);
159  return rv;
160 }
161 
162 static ssize_t queues_read(struct file *file, char __user *user_buf,
163  size_t count, loff_t *ppos)
164 {
165  struct ieee80211_local *local = file->private_data;
166  unsigned long flags;
167  char buf[IEEE80211_MAX_QUEUES * 20];
168  int q, res = 0;
169 
170  spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
171  for (q = 0; q < local->hw.queues; q++)
172  res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,
173  local->queue_stop_reasons[q],
174  skb_queue_len(&local->pending[q]));
175  spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
176 
177  return simple_read_from_buffer(user_buf, count, ppos, buf, res);
178 }
179 
180 DEBUGFS_READONLY_FILE_OPS(hwflags);
181 DEBUGFS_READONLY_FILE_OPS(queues);
182 
183 /* statistics stuff */
184 
185 static ssize_t format_devstat_counter(struct ieee80211_local *local,
186  char __user *userbuf,
187  size_t count, loff_t *ppos,
188  int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
189  int buflen))
190 {
191  struct ieee80211_low_level_stats stats;
192  char buf[20];
193  int res;
194 
195  rtnl_lock();
196  res = drv_get_stats(local, &stats);
197  rtnl_unlock();
198  if (res)
199  return res;
200  res = printvalue(&stats, buf, sizeof(buf));
201  return simple_read_from_buffer(userbuf, count, ppos, buf, res);
202 }
203 
204 #define DEBUGFS_DEVSTATS_FILE(name) \
205 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
206  char *buf, int buflen) \
207 { \
208  return scnprintf(buf, buflen, "%u\n", stats->name); \
209 } \
210 static ssize_t stats_ ##name## _read(struct file *file, \
211  char __user *userbuf, \
212  size_t count, loff_t *ppos) \
213 { \
214  return format_devstat_counter(file->private_data, \
215  userbuf, \
216  count, \
217  ppos, \
218  print_devstats_##name); \
219 } \
220  \
221 static const struct file_operations stats_ ##name## _ops = { \
222  .read = stats_ ##name## _read, \
223  .open = simple_open, \
224  .llseek = generic_file_llseek, \
225 };
226 
227 #define DEBUGFS_STATS_ADD(name, field) \
228  debugfs_create_u32(#name, 0400, statsd, (u32 *) &field);
229 #define DEBUGFS_DEVSTATS_ADD(name) \
230  debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops);
231 
232 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
233 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
234 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
235 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
236 
237 void debugfs_hw_add(struct ieee80211_local *local)
238 {
239  struct dentry *phyd = local->hw.wiphy->debugfsdir;
240  struct dentry *statsd;
241 
242  if (!phyd)
243  return;
244 
245  local->debugfs.keys = debugfs_create_dir("keys", phyd);
246 
247  DEBUGFS_ADD(total_ps_buffered);
248  DEBUGFS_ADD(wep_iv);
249  DEBUGFS_ADD(queues);
250 #ifdef CONFIG_PM
251  DEBUGFS_ADD_MODE(reset, 0200);
252 #endif
253  DEBUGFS_ADD(hwflags);
254  DEBUGFS_ADD(user_power);
255  DEBUGFS_ADD(power);
256 
257  statsd = debugfs_create_dir("statistics", phyd);
258 
259  /* if the dir failed, don't put all the other things into the root! */
260  if (!statsd)
261  return;
262 
263  DEBUGFS_STATS_ADD(transmitted_fragment_count,
264  local->dot11TransmittedFragmentCount);
265  DEBUGFS_STATS_ADD(multicast_transmitted_frame_count,
266  local->dot11MulticastTransmittedFrameCount);
267  DEBUGFS_STATS_ADD(failed_count, local->dot11FailedCount);
268  DEBUGFS_STATS_ADD(retry_count, local->dot11RetryCount);
269  DEBUGFS_STATS_ADD(multiple_retry_count,
270  local->dot11MultipleRetryCount);
271  DEBUGFS_STATS_ADD(frame_duplicate_count,
272  local->dot11FrameDuplicateCount);
273  DEBUGFS_STATS_ADD(received_fragment_count,
274  local->dot11ReceivedFragmentCount);
275  DEBUGFS_STATS_ADD(multicast_received_frame_count,
276  local->dot11MulticastReceivedFrameCount);
277  DEBUGFS_STATS_ADD(transmitted_frame_count,
278  local->dot11TransmittedFrameCount);
279 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
280  DEBUGFS_STATS_ADD(tx_handlers_drop, local->tx_handlers_drop);
281  DEBUGFS_STATS_ADD(tx_handlers_queued, local->tx_handlers_queued);
282  DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted,
283  local->tx_handlers_drop_unencrypted);
284  DEBUGFS_STATS_ADD(tx_handlers_drop_fragment,
285  local->tx_handlers_drop_fragment);
286  DEBUGFS_STATS_ADD(tx_handlers_drop_wep,
287  local->tx_handlers_drop_wep);
288  DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc,
289  local->tx_handlers_drop_not_assoc);
290  DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port,
291  local->tx_handlers_drop_unauth_port);
292  DEBUGFS_STATS_ADD(rx_handlers_drop, local->rx_handlers_drop);
293  DEBUGFS_STATS_ADD(rx_handlers_queued, local->rx_handlers_queued);
294  DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc,
295  local->rx_handlers_drop_nullfunc);
296  DEBUGFS_STATS_ADD(rx_handlers_drop_defrag,
297  local->rx_handlers_drop_defrag);
298  DEBUGFS_STATS_ADD(rx_handlers_drop_short,
299  local->rx_handlers_drop_short);
300  DEBUGFS_STATS_ADD(tx_expand_skb_head,
301  local->tx_expand_skb_head);
302  DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned,
303  local->tx_expand_skb_head_cloned);
304  DEBUGFS_STATS_ADD(rx_expand_skb_head,
305  local->rx_expand_skb_head);
306  DEBUGFS_STATS_ADD(rx_expand_skb_head2,
307  local->rx_expand_skb_head2);
308  DEBUGFS_STATS_ADD(rx_handlers_fragments,
309  local->rx_handlers_fragments);
310  DEBUGFS_STATS_ADD(tx_status_drop,
311  local->tx_status_drop);
312 #endif
313  DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount);
314  DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount);
315  DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount);
316  DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount);
317 }
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