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TOMOYO Linux Cross Reference
Linux/net/mac80211/debugfs.c

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  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(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_BEFORE_ASSOC)
125                 sf += snprintf(buf + sf, mxln - sf, "NEED_DTIM_BEFORE_ASSOC\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 
155         rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
156         kfree(buf);
157         return rv;
158 }
159 
160 static ssize_t queues_read(struct file *file, char __user *user_buf,
161                            size_t count, loff_t *ppos)
162 {
163         struct ieee80211_local *local = file->private_data;
164         unsigned long flags;
165         char buf[IEEE80211_MAX_QUEUES * 20];
166         int q, res = 0;
167 
168         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
169         for (q = 0; q < local->hw.queues; q++)
170                 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,
171                                 local->queue_stop_reasons[q],
172                                 skb_queue_len(&local->pending[q]));
173         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
174 
175         return simple_read_from_buffer(user_buf, count, ppos, buf, res);
176 }
177 
178 DEBUGFS_READONLY_FILE_OPS(hwflags);
179 DEBUGFS_READONLY_FILE_OPS(queues);
180 
181 /* statistics stuff */
182 
183 static ssize_t format_devstat_counter(struct ieee80211_local *local,
184         char __user *userbuf,
185         size_t count, loff_t *ppos,
186         int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
187                           int buflen))
188 {
189         struct ieee80211_low_level_stats stats;
190         char buf[20];
191         int res;
192 
193         rtnl_lock();
194         res = drv_get_stats(local, &stats);
195         rtnl_unlock();
196         if (res)
197                 return res;
198         res = printvalue(&stats, buf, sizeof(buf));
199         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
200 }
201 
202 #define DEBUGFS_DEVSTATS_FILE(name)                                     \
203 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
204                                  char *buf, int buflen)                 \
205 {                                                                       \
206         return scnprintf(buf, buflen, "%u\n", stats->name);             \
207 }                                                                       \
208 static ssize_t stats_ ##name## _read(struct file *file,                 \
209                                      char __user *userbuf,              \
210                                      size_t count, loff_t *ppos)        \
211 {                                                                       \
212         return format_devstat_counter(file->private_data,               \
213                                       userbuf,                          \
214                                       count,                            \
215                                       ppos,                             \
216                                       print_devstats_##name);           \
217 }                                                                       \
218                                                                         \
219 static const struct file_operations stats_ ##name## _ops = {            \
220         .read = stats_ ##name## _read,                                  \
221         .open = simple_open,                                            \
222         .llseek = generic_file_llseek,                                  \
223 };
224 
225 #define DEBUGFS_STATS_ADD(name, field)                                  \
226         debugfs_create_u32(#name, 0400, statsd, (u32 *) &field);
227 #define DEBUGFS_DEVSTATS_ADD(name)                                      \
228         debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops);
229 
230 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
231 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
232 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
233 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
234 
235 void debugfs_hw_add(struct ieee80211_local *local)
236 {
237         struct dentry *phyd = local->hw.wiphy->debugfsdir;
238         struct dentry *statsd;
239 
240         if (!phyd)
241                 return;
242 
243         local->debugfs.keys = debugfs_create_dir("keys", phyd);
244 
245         DEBUGFS_ADD(total_ps_buffered);
246         DEBUGFS_ADD(wep_iv);
247         DEBUGFS_ADD(queues);
248 #ifdef CONFIG_PM
249         DEBUGFS_ADD_MODE(reset, 0200);
250 #endif
251         DEBUGFS_ADD(hwflags);
252         DEBUGFS_ADD(user_power);
253         DEBUGFS_ADD(power);
254 
255         statsd = debugfs_create_dir("statistics", phyd);
256 
257         /* if the dir failed, don't put all the other things into the root! */
258         if (!statsd)
259                 return;
260 
261         DEBUGFS_STATS_ADD(transmitted_fragment_count,
262                 local->dot11TransmittedFragmentCount);
263         DEBUGFS_STATS_ADD(multicast_transmitted_frame_count,
264                 local->dot11MulticastTransmittedFrameCount);
265         DEBUGFS_STATS_ADD(failed_count, local->dot11FailedCount);
266         DEBUGFS_STATS_ADD(retry_count, local->dot11RetryCount);
267         DEBUGFS_STATS_ADD(multiple_retry_count,
268                 local->dot11MultipleRetryCount);
269         DEBUGFS_STATS_ADD(frame_duplicate_count,
270                 local->dot11FrameDuplicateCount);
271         DEBUGFS_STATS_ADD(received_fragment_count,
272                 local->dot11ReceivedFragmentCount);
273         DEBUGFS_STATS_ADD(multicast_received_frame_count,
274                 local->dot11MulticastReceivedFrameCount);
275         DEBUGFS_STATS_ADD(transmitted_frame_count,
276                 local->dot11TransmittedFrameCount);
277 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
278         DEBUGFS_STATS_ADD(tx_handlers_drop, local->tx_handlers_drop);
279         DEBUGFS_STATS_ADD(tx_handlers_queued, local->tx_handlers_queued);
280         DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted,
281                 local->tx_handlers_drop_unencrypted);
282         DEBUGFS_STATS_ADD(tx_handlers_drop_fragment,
283                 local->tx_handlers_drop_fragment);
284         DEBUGFS_STATS_ADD(tx_handlers_drop_wep,
285                 local->tx_handlers_drop_wep);
286         DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc,
287                 local->tx_handlers_drop_not_assoc);
288         DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port,
289                 local->tx_handlers_drop_unauth_port);
290         DEBUGFS_STATS_ADD(rx_handlers_drop, local->rx_handlers_drop);
291         DEBUGFS_STATS_ADD(rx_handlers_queued, local->rx_handlers_queued);
292         DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc,
293                 local->rx_handlers_drop_nullfunc);
294         DEBUGFS_STATS_ADD(rx_handlers_drop_defrag,
295                 local->rx_handlers_drop_defrag);
296         DEBUGFS_STATS_ADD(rx_handlers_drop_short,
297                 local->rx_handlers_drop_short);
298         DEBUGFS_STATS_ADD(tx_expand_skb_head,
299                 local->tx_expand_skb_head);
300         DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned,
301                 local->tx_expand_skb_head_cloned);
302         DEBUGFS_STATS_ADD(rx_expand_skb_head,
303                 local->rx_expand_skb_head);
304         DEBUGFS_STATS_ADD(rx_expand_skb_head2,
305                 local->rx_expand_skb_head2);
306         DEBUGFS_STATS_ADD(rx_handlers_fragments,
307                 local->rx_handlers_fragments);
308         DEBUGFS_STATS_ADD(tx_status_drop,
309                 local->tx_status_drop);
310 #endif
311         DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount);
312         DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount);
313         DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount);
314         DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount);
315 }
316 

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