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   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(antenna_sel_tx, 20, "%d",
  51                       local->hw.conf.antenna_sel_tx);
  52 DEBUGFS_READONLY_FILE(antenna_sel_rx, 20, "%d",
  53                       local->hw.conf.antenna_sel_rx);
  54 DEBUGFS_READONLY_FILE(bridge_packets, 20, "%d",
  55                       local->bridge_packets);
  56 DEBUGFS_READONLY_FILE(rts_threshold, 20, "%d",
  57                       local->rts_threshold);
  58 DEBUGFS_READONLY_FILE(fragmentation_threshold, 20, "%d",
  59                       local->fragmentation_threshold);
  60 DEBUGFS_READONLY_FILE(short_retry_limit, 20, "%d",
  61                       local->short_retry_limit);
  62 DEBUGFS_READONLY_FILE(long_retry_limit, 20, "%d",
  63                       local->long_retry_limit);
  64 DEBUGFS_READONLY_FILE(total_ps_buffered, 20, "%d",
  65                       local->total_ps_buffered);
  66 DEBUGFS_READONLY_FILE(wep_iv, 20, "%#06x",
  67                       local->wep_iv & 0xffffff);
  68 DEBUGFS_READONLY_FILE(rate_ctrl_alg, 100, "%s",
  69                       local->rate_ctrl ? local->rate_ctrl->ops->name : "<unset>");
  70
  71 /* statistics stuff */
  72
  73 static inline int rtnl_lock_local(struct ieee80211_local *local)
  74 {
  75         rtnl_lock();
  76         if (unlikely(local->reg_state != IEEE80211_DEV_REGISTERED)) {
  77                 rtnl_unlock();
  78                 return -ENODEV;
  79         }
  80         return 0;
  81 }
  82
  83 #define DEBUGFS_STATS_FILE(name, buflen, fmt, value...)                 \
  84         DEBUGFS_READONLY_FILE(stats_ ##name, buflen, fmt, ##value)
  85
  86 static ssize_t format_devstat_counter(struct ieee80211_local *local,
  87         char __user *userbuf,
  88         size_t count, loff_t *ppos,
  89         int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
  90                           int buflen))
  91 {
  92         struct ieee80211_low_level_stats stats;
  93         char buf[20];
  94         int res;
  95
  96         if (!local->ops->get_stats)
  97                 return -EOPNOTSUPP;
  98
  99         res = rtnl_lock_local(local);
 100         if (res)
 101                 return res;
 102
 103         res = local->ops->get_stats(local_to_hw(local), &stats);
 104         rtnl_unlock();
 105         if (!res)
 106                 res = printvalue(&stats, buf, sizeof(buf));
 107         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
 108 }
 109
 110 #define DEBUGFS_DEVSTATS_FILE(name)                                     \
 111 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
 112                                  char *buf, int buflen)                 \
 113 {                                                                       \
 114         return scnprintf(buf, buflen, "%u\n", stats->name);             \
 115 }                                                                       \
 116 static ssize_t stats_ ##name## _read(struct file *file,                 \
 117                                      char __user *userbuf,              \
 118                                      size_t count, loff_t *ppos)        \
 119 {                                                                       \
 120         return format_devstat_counter(file->private_data,               \
 121                                       userbuf,                          \
 122                                       count,                            \
 123                                       ppos,                             \
 124                                       print_devstats_##name);           \
 125 }                                                                       \
 126                                                                         \
 127 static const struct file_operations stats_ ##name## _ops = {            \
 128         .read = stats_ ##name## _read,                                  \
 129         .open = mac80211_open_file_generic,                             \
 130 };
 131
 132 #define DEBUGFS_STATS_ADD(name)                                         \
 133         local->debugfs.stats.name = debugfs_create_file(#name, 0400, statsd,\
 134                 local, &stats_ ##name## _ops);
 135
 136 #define DEBUGFS_STATS_DEL(name)                                         \
 137         debugfs_remove(local->debugfs.stats.name);                      \
 138         local->debugfs.stats.name = NULL;
 139
 140 DEBUGFS_STATS_FILE(transmitted_fragment_count, 20, "%u",
 141                    local->dot11TransmittedFragmentCount);
 142 DEBUGFS_STATS_FILE(multicast_transmitted_frame_count, 20, "%u",
 143                    local->dot11MulticastTransmittedFrameCount);
 144 DEBUGFS_STATS_FILE(failed_count, 20, "%u",
 145                    local->dot11FailedCount);
 146 DEBUGFS_STATS_FILE(retry_count, 20, "%u",
 147                    local->dot11RetryCount);
 148 DEBUGFS_STATS_FILE(multiple_retry_count, 20, "%u",
 149                    local->dot11MultipleRetryCount);
 150 DEBUGFS_STATS_FILE(frame_duplicate_count, 20, "%u",
 151                    local->dot11FrameDuplicateCount);
 152 DEBUGFS_STATS_FILE(received_fragment_count, 20, "%u",
 153                    local->dot11ReceivedFragmentCount);
 154 DEBUGFS_STATS_FILE(multicast_received_frame_count, 20, "%u",
 155                    local->dot11MulticastReceivedFrameCount);
 156 DEBUGFS_STATS_FILE(transmitted_frame_count, 20, "%u",
 157                    local->dot11TransmittedFrameCount);
 158 DEBUGFS_STATS_FILE(wep_undecryptable_count, 20, "%u",
 159                    local->dot11WEPUndecryptableCount);
 160 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 161 DEBUGFS_STATS_FILE(tx_handlers_drop, 20, "%u",
 162                    local->tx_handlers_drop);
 163 DEBUGFS_STATS_FILE(tx_handlers_queued, 20, "%u",
 164                    local->tx_handlers_queued);
 165 DEBUGFS_STATS_FILE(tx_handlers_drop_unencrypted, 20, "%u",
 166                    local->tx_handlers_drop_unencrypted);
 167 DEBUGFS_STATS_FILE(tx_handlers_drop_fragment, 20, "%u",
 168                    local->tx_handlers_drop_fragment);
 169 DEBUGFS_STATS_FILE(tx_handlers_drop_wep, 20, "%u",
 170                    local->tx_handlers_drop_wep);
 171 DEBUGFS_STATS_FILE(tx_handlers_drop_not_assoc, 20, "%u",
 172                    local->tx_handlers_drop_not_assoc);
 173 DEBUGFS_STATS_FILE(tx_handlers_drop_unauth_port, 20, "%u",
 174                    local->tx_handlers_drop_unauth_port);
 175 DEBUGFS_STATS_FILE(rx_handlers_drop, 20, "%u",
 176                    local->rx_handlers_drop);
 177 DEBUGFS_STATS_FILE(rx_handlers_queued, 20, "%u",
 178                    local->rx_handlers_queued);
 179 DEBUGFS_STATS_FILE(rx_handlers_drop_nullfunc, 20, "%u",
 180                    local->rx_handlers_drop_nullfunc);
 181 DEBUGFS_STATS_FILE(rx_handlers_drop_defrag, 20, "%u",
 182                    local->rx_handlers_drop_defrag);
 183 DEBUGFS_STATS_FILE(rx_handlers_drop_short, 20, "%u",
 184                    local->rx_handlers_drop_short);
 185 DEBUGFS_STATS_FILE(rx_handlers_drop_passive_scan, 20, "%u",
 186                    local->rx_handlers_drop_passive_scan);
 187 DEBUGFS_STATS_FILE(tx_expand_skb_head, 20, "%u",
 188                    local->tx_expand_skb_head);
 189 DEBUGFS_STATS_FILE(tx_expand_skb_head_cloned, 20, "%u",
 190                    local->tx_expand_skb_head_cloned);
 191 DEBUGFS_STATS_FILE(rx_expand_skb_head, 20, "%u",
 192                    local->rx_expand_skb_head);
 193 DEBUGFS_STATS_FILE(rx_expand_skb_head2, 20, "%u",
 194                    local->rx_expand_skb_head2);
 195 DEBUGFS_STATS_FILE(rx_handlers_fragments, 20, "%u",
 196                    local->rx_handlers_fragments);
 197 DEBUGFS_STATS_FILE(tx_status_drop, 20, "%u",
 198                    local->tx_status_drop);
 199
 200 #endif
 201
 202 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
 203 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
 204 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
 205 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
 206
 207
 208 void debugfs_hw_add(struct ieee80211_local *local)
 209 {
 210         struct dentry *phyd = local->hw.wiphy->debugfsdir;
 211         struct dentry *statsd;
 212
 213         if (!phyd)
 214                 return;
 215
 216         local->debugfs.stations = debugfs_create_dir("stations", phyd);
 217         local->debugfs.keys = debugfs_create_dir("keys", phyd);
 218
 219         DEBUGFS_ADD(frequency);
 220         DEBUGFS_ADD(antenna_sel_tx);
 221         DEBUGFS_ADD(antenna_sel_rx);
 222         DEBUGFS_ADD(bridge_packets);
 223         DEBUGFS_ADD(rts_threshold);
 224         DEBUGFS_ADD(fragmentation_threshold);
 225         DEBUGFS_ADD(short_retry_limit);
 226         DEBUGFS_ADD(long_retry_limit);
 227         DEBUGFS_ADD(total_ps_buffered);
 228         DEBUGFS_ADD(wep_iv);
 229
 230         statsd = debugfs_create_dir("statistics", phyd);
 231         local->debugfs.statistics = statsd;
 232
 233         /* if the dir failed, don't put all the other things into the root! */
 234         if (!statsd)
 235                 return;
 236
 237         DEBUGFS_STATS_ADD(transmitted_fragment_count);
 238         DEBUGFS_STATS_ADD(multicast_transmitted_frame_count);
 239         DEBUGFS_STATS_ADD(failed_count);
 240         DEBUGFS_STATS_ADD(retry_count);
 241         DEBUGFS_STATS_ADD(multiple_retry_count);
 242         DEBUGFS_STATS_ADD(frame_duplicate_count);
 243         DEBUGFS_STATS_ADD(received_fragment_count);
 244         DEBUGFS_STATS_ADD(multicast_received_frame_count);
 245         DEBUGFS_STATS_ADD(transmitted_frame_count);
 246         DEBUGFS_STATS_ADD(wep_undecryptable_count);
 247 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 248         DEBUGFS_STATS_ADD(tx_handlers_drop);
 249         DEBUGFS_STATS_ADD(tx_handlers_queued);
 250         DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted);
 251         DEBUGFS_STATS_ADD(tx_handlers_drop_fragment);
 252         DEBUGFS_STATS_ADD(tx_handlers_drop_wep);
 253         DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc);
 254         DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port);
 255         DEBUGFS_STATS_ADD(rx_handlers_drop);
 256         DEBUGFS_STATS_ADD(rx_handlers_queued);
 257         DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc);
 258         DEBUGFS_STATS_ADD(rx_handlers_drop_defrag);
 259         DEBUGFS_STATS_ADD(rx_handlers_drop_short);
 260         DEBUGFS_STATS_ADD(rx_handlers_drop_passive_scan);
 261         DEBUGFS_STATS_ADD(tx_expand_skb_head);
 262         DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned);
 263         DEBUGFS_STATS_ADD(rx_expand_skb_head);
 264         DEBUGFS_STATS_ADD(rx_expand_skb_head2);
 265         DEBUGFS_STATS_ADD(rx_handlers_fragments);
 266         DEBUGFS_STATS_ADD(tx_status_drop);
 267 #endif
 268         DEBUGFS_STATS_ADD(dot11ACKFailureCount);
 269         DEBUGFS_STATS_ADD(dot11RTSFailureCount);
 270         DEBUGFS_STATS_ADD(dot11FCSErrorCount);
 271         DEBUGFS_STATS_ADD(dot11RTSSuccessCount);
 272 }
 273
 274 void debugfs_hw_del(struct ieee80211_local *local)
 275 {
 276         DEBUGFS_DEL(frequency);
 277         DEBUGFS_DEL(antenna_sel_tx);
 278         DEBUGFS_DEL(antenna_sel_rx);
 279         DEBUGFS_DEL(bridge_packets);
 280         DEBUGFS_DEL(rts_threshold);
 281         DEBUGFS_DEL(fragmentation_threshold);
 282         DEBUGFS_DEL(short_retry_limit);
 283         DEBUGFS_DEL(long_retry_limit);
 284         DEBUGFS_DEL(total_ps_buffered);
 285         DEBUGFS_DEL(wep_iv);
 286
 287         DEBUGFS_STATS_DEL(transmitted_fragment_count);
 288         DEBUGFS_STATS_DEL(multicast_transmitted_frame_count);
 289         DEBUGFS_STATS_DEL(failed_count);
 290         DEBUGFS_STATS_DEL(retry_count);
 291         DEBUGFS_STATS_DEL(multiple_retry_count);
 292         DEBUGFS_STATS_DEL(frame_duplicate_count);
 293         DEBUGFS_STATS_DEL(received_fragment_count);
 294         DEBUGFS_STATS_DEL(multicast_received_frame_count);
 295         DEBUGFS_STATS_DEL(transmitted_frame_count);
 296         DEBUGFS_STATS_DEL(wep_undecryptable_count);
 297         DEBUGFS_STATS_DEL(num_scans);
 298 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 299         DEBUGFS_STATS_DEL(tx_handlers_drop);
 300         DEBUGFS_STATS_DEL(tx_handlers_queued);
 301         DEBUGFS_STATS_DEL(tx_handlers_drop_unencrypted);
 302         DEBUGFS_STATS_DEL(tx_handlers_drop_fragment);
 303         DEBUGFS_STATS_DEL(tx_handlers_drop_wep);
 304         DEBUGFS_STATS_DEL(tx_handlers_drop_not_assoc);
 305         DEBUGFS_STATS_DEL(tx_handlers_drop_unauth_port);
 306         DEBUGFS_STATS_DEL(rx_handlers_drop);
 307         DEBUGFS_STATS_DEL(rx_handlers_queued);
 308         DEBUGFS_STATS_DEL(rx_handlers_drop_nullfunc);
 309         DEBUGFS_STATS_DEL(rx_handlers_drop_defrag);
 310         DEBUGFS_STATS_DEL(rx_handlers_drop_short);
 311         DEBUGFS_STATS_DEL(rx_handlers_drop_passive_scan);
 312         DEBUGFS_STATS_DEL(tx_expand_skb_head);
 313         DEBUGFS_STATS_DEL(tx_expand_skb_head_cloned);
 314         DEBUGFS_STATS_DEL(rx_expand_skb_head);
 315         DEBUGFS_STATS_DEL(rx_expand_skb_head2);
 316         DEBUGFS_STATS_DEL(rx_handlers_fragments);
 317         DEBUGFS_STATS_DEL(tx_status_drop);
 318 #endif
 319         DEBUGFS_STATS_DEL(dot11ACKFailureCount);
 320         DEBUGFS_STATS_DEL(dot11RTSFailureCount);
 321         DEBUGFS_STATS_DEL(dot11FCSErrorCount);
 322         DEBUGFS_STATS_DEL(dot11RTSSuccessCount);
 323
 324         debugfs_remove(local->debugfs.statistics);
 325         local->debugfs.statistics = NULL;
 326         debugfs_remove(local->debugfs.stations);
 327         local->debugfs.stations = NULL;
 328         debugfs_remove(local->debugfs.keys);
 329         local->debugfs.keys = NULL;
 330 }