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 "rate.h"
  14 #include "debugfs.h"
  15
  16 int mac80211_open_file_generic(struct inode *inode, struct file *file)
  17 {
  18         file->private_data = inode->i_private;
  19         return 0;
  20 }
  21
  22 #define DEBUGFS_READONLY_FILE(name, buflen, fmt, value...)              \
  23 static ssize_t name## _read(struct file *file, char __user *userbuf,    \
  24                             size_t count, loff_t *ppos)                 \
  25 {                                                                       \
  26         struct ieee80211_local *local = file->private_data;             \
  27         char buf[buflen];                                               \
  28         int res;                                                        \
  29                                                                         \
  30         res = scnprintf(buf, buflen, fmt "\n", ##value);                \
  31         return simple_read_from_buffer(userbuf, count, ppos, buf, res); \
  32 }                                                                       \
  33                                                                         \
  34 static const struct file_operations name## _ops = {                     \
  35         .read = name## _read,                                           \
  36         .open = mac80211_open_file_generic,                             \
  37 };
  38
  39 #define DEBUGFS_ADD(name)                                               \
  40         local->debugfs.name = debugfs_create_file(#name, 0400, phyd,    \
  41                                                   local, &name## _ops);
  42
  43 #define DEBUGFS_DEL(name)                                               \
  44         debugfs_remove(local->debugfs.name);                            \
  45         local->debugfs.name = NULL;
  46
  47
  48 DEBUGFS_READONLY_FILE(frequency, 20, "%d",
  49                       local->hw.conf.channel->center_freq);
  50 DEBUGFS_READONLY_FILE(rts_threshold, 20, "%d",
  51                       local->rts_threshold);
  52 DEBUGFS_READONLY_FILE(fragmentation_threshold, 20, "%d",
  53                       local->fragmentation_threshold);
  54 DEBUGFS_READONLY_FILE(short_retry_limit, 20, "%d",
  55                       local->hw.conf.short_frame_max_tx_count);
  56 DEBUGFS_READONLY_FILE(long_retry_limit, 20, "%d",
  57                       local->hw.conf.long_frame_max_tx_count);
  58 DEBUGFS_READONLY_FILE(total_ps_buffered, 20, "%d",
  59                       local->total_ps_buffered);
  60 DEBUGFS_READONLY_FILE(wep_iv, 20, "%#06x",
  61                       local->wep_iv & 0xffffff);
  62 DEBUGFS_READONLY_FILE(rate_ctrl_alg, 100, "%s",
  63                       local->rate_ctrl ? local->rate_ctrl->ops->name : "<unset>");
  64
  65 /* statistics stuff */
  66
  67 #define DEBUGFS_STATS_FILE(name, buflen, fmt, value...)                 \
  68         DEBUGFS_READONLY_FILE(stats_ ##name, buflen, fmt, ##value)
  69
  70 static ssize_t format_devstat_counter(struct ieee80211_local *local,
  71         char __user *userbuf,
  72         size_t count, loff_t *ppos,
  73         int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
  74                           int buflen))
  75 {
  76         struct ieee80211_low_level_stats stats;
  77         char buf[20];
  78         int res;
  79
  80         if (!local->ops->get_stats)
  81                 return -EOPNOTSUPP;
  82
  83         rtnl_lock();
  84         res = local->ops->get_stats(local_to_hw(local), &stats);
  85         rtnl_unlock();
  86         if (!res)
  87                 res = printvalue(&stats, buf, sizeof(buf));
  88         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
  89 }
  90
  91 #define DEBUGFS_DEVSTATS_FILE(name)                                     \
  92 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
  93                                  char *buf, int buflen)                 \
  94 {                                                                       \
  95         return scnprintf(buf, buflen, "%u\n", stats->name);             \
  96 }                                                                       \
  97 static ssize_t stats_ ##name## _read(struct file *file,                 \
  98                                      char __user *userbuf,              \
  99                                      size_t count, loff_t *ppos)        \
 100 {                                                                       \
 101         return format_devstat_counter(file->private_data,               \
 102                                       userbuf,                          \
 103                                       count,                            \
 104                                       ppos,                             \
 105                                       print_devstats_##name);           \
 106 }                                                                       \
 107                                                                         \
 108 static const struct file_operations stats_ ##name## _ops = {            \
 109         .read = stats_ ##name## _read,                                  \
 110         .open = mac80211_open_file_generic,                             \
 111 };
 112
 113 #define DEBUGFS_STATS_ADD(name)                                         \
 114         local->debugfs.stats.name = debugfs_create_file(#name, 0400, statsd,\
 115                 local, &stats_ ##name## _ops);
 116
 117 #define DEBUGFS_STATS_DEL(name)                                         \
 118         debugfs_remove(local->debugfs.stats.name);                      \
 119         local->debugfs.stats.name = NULL;
 120
 121 DEBUGFS_STATS_FILE(transmitted_fragment_count, 20, "%u",
 122                    local->dot11TransmittedFragmentCount);
 123 DEBUGFS_STATS_FILE(multicast_transmitted_frame_count, 20, "%u",
 124                    local->dot11MulticastTransmittedFrameCount);
 125 DEBUGFS_STATS_FILE(failed_count, 20, "%u",
 126                    local->dot11FailedCount);
 127 DEBUGFS_STATS_FILE(retry_count, 20, "%u",
 128                    local->dot11RetryCount);
 129 DEBUGFS_STATS_FILE(multiple_retry_count, 20, "%u",
 130                    local->dot11MultipleRetryCount);
 131 DEBUGFS_STATS_FILE(frame_duplicate_count, 20, "%u",
 132                    local->dot11FrameDuplicateCount);
 133 DEBUGFS_STATS_FILE(received_fragment_count, 20, "%u",
 134                    local->dot11ReceivedFragmentCount);
 135 DEBUGFS_STATS_FILE(multicast_received_frame_count, 20, "%u",
 136                    local->dot11MulticastReceivedFrameCount);
 137 DEBUGFS_STATS_FILE(transmitted_frame_count, 20, "%u",
 138                    local->dot11TransmittedFrameCount);
 139 DEBUGFS_STATS_FILE(wep_undecryptable_count, 20, "%u",
 140                    local->dot11WEPUndecryptableCount);
 141 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 142 DEBUGFS_STATS_FILE(tx_handlers_drop, 20, "%u",
 143                    local->tx_handlers_drop);
 144 DEBUGFS_STATS_FILE(tx_handlers_queued, 20, "%u",
 145                    local->tx_handlers_queued);
 146 DEBUGFS_STATS_FILE(tx_handlers_drop_unencrypted, 20, "%u",
 147                    local->tx_handlers_drop_unencrypted);
 148 DEBUGFS_STATS_FILE(tx_handlers_drop_fragment, 20, "%u",
 149                    local->tx_handlers_drop_fragment);
 150 DEBUGFS_STATS_FILE(tx_handlers_drop_wep, 20, "%u",
 151                    local->tx_handlers_drop_wep);
 152 DEBUGFS_STATS_FILE(tx_handlers_drop_not_assoc, 20, "%u",
 153                    local->tx_handlers_drop_not_assoc);
 154 DEBUGFS_STATS_FILE(tx_handlers_drop_unauth_port, 20, "%u",
 155                    local->tx_handlers_drop_unauth_port);
 156 DEBUGFS_STATS_FILE(rx_handlers_drop, 20, "%u",
 157                    local->rx_handlers_drop);
 158 DEBUGFS_STATS_FILE(rx_handlers_queued, 20, "%u",
 159                    local->rx_handlers_queued);
 160 DEBUGFS_STATS_FILE(rx_handlers_drop_nullfunc, 20, "%u",
 161                    local->rx_handlers_drop_nullfunc);
 162 DEBUGFS_STATS_FILE(rx_handlers_drop_defrag, 20, "%u",
 163                    local->rx_handlers_drop_defrag);
 164 DEBUGFS_STATS_FILE(rx_handlers_drop_short, 20, "%u",
 165                    local->rx_handlers_drop_short);
 166 DEBUGFS_STATS_FILE(rx_handlers_drop_passive_scan, 20, "%u",
 167                    local->rx_handlers_drop_passive_scan);
 168 DEBUGFS_STATS_FILE(tx_expand_skb_head, 20, "%u",
 169                    local->tx_expand_skb_head);
 170 DEBUGFS_STATS_FILE(tx_expand_skb_head_cloned, 20, "%u",
 171                    local->tx_expand_skb_head_cloned);
 172 DEBUGFS_STATS_FILE(rx_expand_skb_head, 20, "%u",
 173                    local->rx_expand_skb_head);
 174 DEBUGFS_STATS_FILE(rx_expand_skb_head2, 20, "%u",
 175                    local->rx_expand_skb_head2);
 176 DEBUGFS_STATS_FILE(rx_handlers_fragments, 20, "%u",
 177                    local->rx_handlers_fragments);
 178 DEBUGFS_STATS_FILE(tx_status_drop, 20, "%u",
 179                    local->tx_status_drop);
 180
 181 #endif
 182
 183 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
 184 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
 185 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
 186 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
 187
 188
 189 void debugfs_hw_add(struct ieee80211_local *local)
 190 {
 191         struct dentry *phyd = local->hw.wiphy->debugfsdir;
 192         struct dentry *statsd;
 193
 194         if (!phyd)
 195                 return;
 196
 197         local->debugfs.stations = debugfs_create_dir("stations", phyd);
 198         local->debugfs.keys = debugfs_create_dir("keys", phyd);
 199
 200         DEBUGFS_ADD(frequency);
 201         DEBUGFS_ADD(rts_threshold);
 202         DEBUGFS_ADD(fragmentation_threshold);
 203         DEBUGFS_ADD(short_retry_limit);
 204         DEBUGFS_ADD(long_retry_limit);
 205         DEBUGFS_ADD(total_ps_buffered);
 206         DEBUGFS_ADD(wep_iv);
 207
 208         statsd = debugfs_create_dir("statistics", phyd);
 209         local->debugfs.statistics = statsd;
 210
 211         /* if the dir failed, don't put all the other things into the root! */
 212         if (!statsd)
 213                 return;
 214
 215         DEBUGFS_STATS_ADD(transmitted_fragment_count);
 216         DEBUGFS_STATS_ADD(multicast_transmitted_frame_count);
 217         DEBUGFS_STATS_ADD(failed_count);
 218         DEBUGFS_STATS_ADD(retry_count);
 219         DEBUGFS_STATS_ADD(multiple_retry_count);
 220         DEBUGFS_STATS_ADD(frame_duplicate_count);
 221         DEBUGFS_STATS_ADD(received_fragment_count);
 222         DEBUGFS_STATS_ADD(multicast_received_frame_count);
 223         DEBUGFS_STATS_ADD(transmitted_frame_count);
 224         DEBUGFS_STATS_ADD(wep_undecryptable_count);
 225 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 226         DEBUGFS_STATS_ADD(tx_handlers_drop);
 227         DEBUGFS_STATS_ADD(tx_handlers_queued);
 228         DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted);
 229         DEBUGFS_STATS_ADD(tx_handlers_drop_fragment);
 230         DEBUGFS_STATS_ADD(tx_handlers_drop_wep);
 231         DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc);
 232         DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port);
 233         DEBUGFS_STATS_ADD(rx_handlers_drop);
 234         DEBUGFS_STATS_ADD(rx_handlers_queued);
 235         DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc);
 236         DEBUGFS_STATS_ADD(rx_handlers_drop_defrag);
 237         DEBUGFS_STATS_ADD(rx_handlers_drop_short);
 238         DEBUGFS_STATS_ADD(rx_handlers_drop_passive_scan);
 239         DEBUGFS_STATS_ADD(tx_expand_skb_head);
 240         DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned);
 241         DEBUGFS_STATS_ADD(rx_expand_skb_head);
 242         DEBUGFS_STATS_ADD(rx_expand_skb_head2);
 243         DEBUGFS_STATS_ADD(rx_handlers_fragments);
 244         DEBUGFS_STATS_ADD(tx_status_drop);
 245 #endif
 246         DEBUGFS_STATS_ADD(dot11ACKFailureCount);
 247         DEBUGFS_STATS_ADD(dot11RTSFailureCount);
 248         DEBUGFS_STATS_ADD(dot11FCSErrorCount);
 249         DEBUGFS_STATS_ADD(dot11RTSSuccessCount);
 250 }
 251
 252 void debugfs_hw_del(struct ieee80211_local *local)
 253 {
 254         DEBUGFS_DEL(frequency);
 255         DEBUGFS_DEL(rts_threshold);
 256         DEBUGFS_DEL(fragmentation_threshold);
 257         DEBUGFS_DEL(short_retry_limit);
 258         DEBUGFS_DEL(long_retry_limit);
 259         DEBUGFS_DEL(total_ps_buffered);
 260         DEBUGFS_DEL(wep_iv);
 261
 262         DEBUGFS_STATS_DEL(transmitted_fragment_count);
 263         DEBUGFS_STATS_DEL(multicast_transmitted_frame_count);
 264         DEBUGFS_STATS_DEL(failed_count);
 265         DEBUGFS_STATS_DEL(retry_count);
 266         DEBUGFS_STATS_DEL(multiple_retry_count);
 267         DEBUGFS_STATS_DEL(frame_duplicate_count);
 268         DEBUGFS_STATS_DEL(received_fragment_count);
 269         DEBUGFS_STATS_DEL(multicast_received_frame_count);
 270         DEBUGFS_STATS_DEL(transmitted_frame_count);
 271         DEBUGFS_STATS_DEL(wep_undecryptable_count);
 272         DEBUGFS_STATS_DEL(num_scans);
 273 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 274         DEBUGFS_STATS_DEL(tx_handlers_drop);
 275         DEBUGFS_STATS_DEL(tx_handlers_queued);
 276         DEBUGFS_STATS_DEL(tx_handlers_drop_unencrypted);
 277         DEBUGFS_STATS_DEL(tx_handlers_drop_fragment);
 278         DEBUGFS_STATS_DEL(tx_handlers_drop_wep);
 279         DEBUGFS_STATS_DEL(tx_handlers_drop_not_assoc);
 280         DEBUGFS_STATS_DEL(tx_handlers_drop_unauth_port);
 281         DEBUGFS_STATS_DEL(rx_handlers_drop);
 282         DEBUGFS_STATS_DEL(rx_handlers_queued);
 283         DEBUGFS_STATS_DEL(rx_handlers_drop_nullfunc);
 284         DEBUGFS_STATS_DEL(rx_handlers_drop_defrag);
 285         DEBUGFS_STATS_DEL(rx_handlers_drop_short);
 286         DEBUGFS_STATS_DEL(rx_handlers_drop_passive_scan);
 287         DEBUGFS_STATS_DEL(tx_expand_skb_head);
 288         DEBUGFS_STATS_DEL(tx_expand_skb_head_cloned);
 289         DEBUGFS_STATS_DEL(rx_expand_skb_head);
 290         DEBUGFS_STATS_DEL(rx_expand_skb_head2);
 291         DEBUGFS_STATS_DEL(rx_handlers_fragments);
 292         DEBUGFS_STATS_DEL(tx_status_drop);
 293 #endif
 294         DEBUGFS_STATS_DEL(dot11ACKFailureCount);
 295         DEBUGFS_STATS_DEL(dot11RTSFailureCount);
 296         DEBUGFS_STATS_DEL(dot11FCSErrorCount);
 297         DEBUGFS_STATS_DEL(dot11RTSSuccessCount);
 298
 299         debugfs_remove(local->debugfs.statistics);
 300         local->debugfs.statistics = NULL;
 301         debugfs_remove(local->debugfs.stations);
 302         local->debugfs.stations = NULL;
 303         debugfs_remove(local->debugfs.keys);
 304         local->debugfs.keys = NULL;
 305 }