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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(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, "%#08x",
  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 static ssize_t tsf_read(struct file *file, char __user *user_buf,
  66                              size_t count, loff_t *ppos)
  67 {
  68         struct ieee80211_local *local = file->private_data;
  69         u64 tsf = 0;
  70         char buf[100];
  71
  72         if (local->ops->get_tsf)
  73                 tsf = local->ops->get_tsf(local_to_hw(local));
  74
  75         snprintf(buf, sizeof(buf), "0x%016llx\n", (unsigned long long) tsf);
  76
  77         return simple_read_from_buffer(user_buf, count, ppos, buf, 19);
  78 }
  79
  80 static ssize_t tsf_write(struct file *file,
  81                          const char __user *user_buf,
  82                          size_t count, loff_t *ppos)
  83 {
  84         struct ieee80211_local *local = file->private_data;
  85         unsigned long long tsf;
  86         char buf[100];
  87         size_t len;
  88
  89         len = min(count, sizeof(buf) - 1);
  90         if (copy_from_user(buf, user_buf, len))
  91                 return -EFAULT;
  92         buf[len] = '\0';
  93
  94         if (strncmp(buf, "reset", 5) == 0) {
  95                 if (local->ops->reset_tsf) {
  96                         local->ops->reset_tsf(local_to_hw(local));
  97                         printk(KERN_INFO "%s: debugfs reset TSF\n", wiphy_name(local->hw.wiphy));
  98                 }
  99         } else {
 100                 tsf = simple_strtoul(buf, NULL, 0);
 101                 if (local->ops->set_tsf) {
 102                         local->ops->set_tsf(local_to_hw(local), tsf);
 103                         printk(KERN_INFO "%s: debugfs set TSF to %#018llx\n", wiphy_name(local->hw.wiphy), tsf);
 104                 }
 105         }
 106
 107         return count;
 108 }
 109
 110 static const struct file_operations tsf_ops = {
 111         .read = tsf_read,
 112         .write = tsf_write,
 113         .open = mac80211_open_file_generic
 114 };
 115
 116 /* statistics stuff */
 117
 118 #define DEBUGFS_STATS_FILE(name, buflen, fmt, value...)                 \
 119         DEBUGFS_READONLY_FILE(stats_ ##name, buflen, fmt, ##value)
 120
 121 static ssize_t format_devstat_counter(struct ieee80211_local *local,
 122         char __user *userbuf,
 123         size_t count, loff_t *ppos,
 124         int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
 125                           int buflen))
 126 {
 127         struct ieee80211_low_level_stats stats;
 128         char buf[20];
 129         int res;
 130
 131         if (!local->ops->get_stats)
 132                 return -EOPNOTSUPP;
 133
 134         rtnl_lock();
 135         res = local->ops->get_stats(local_to_hw(local), &stats);
 136         rtnl_unlock();
 137         if (!res)
 138                 res = printvalue(&stats, buf, sizeof(buf));
 139         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
 140 }
 141
 142 #define DEBUGFS_DEVSTATS_FILE(name)                                     \
 143 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
 144                                  char *buf, int buflen)                 \
 145 {                                                                       \
 146         return scnprintf(buf, buflen, "%u\n", stats->name);             \
 147 }                                                                       \
 148 static ssize_t stats_ ##name## _read(struct file *file,                 \
 149                                      char __user *userbuf,              \
 150                                      size_t count, loff_t *ppos)        \
 151 {                                                                       \
 152         return format_devstat_counter(file->private_data,               \
 153                                       userbuf,                          \
 154                                       count,                            \
 155                                       ppos,                             \
 156                                       print_devstats_##name);           \
 157 }                                                                       \
 158                                                                         \
 159 static const struct file_operations stats_ ##name## _ops = {            \
 160         .read = stats_ ##name## _read,                                  \
 161         .open = mac80211_open_file_generic,                             \
 162 };
 163
 164 #define DEBUGFS_STATS_ADD(name)                                         \
 165         local->debugfs.stats.name = debugfs_create_file(#name, 0400, statsd,\
 166                 local, &stats_ ##name## _ops);
 167
 168 #define DEBUGFS_STATS_DEL(name)                                         \
 169         debugfs_remove(local->debugfs.stats.name);                      \
 170         local->debugfs.stats.name = NULL;
 171
 172 DEBUGFS_STATS_FILE(transmitted_fragment_count, 20, "%u",
 173                    local->dot11TransmittedFragmentCount);
 174 DEBUGFS_STATS_FILE(multicast_transmitted_frame_count, 20, "%u",
 175                    local->dot11MulticastTransmittedFrameCount);
 176 DEBUGFS_STATS_FILE(failed_count, 20, "%u",
 177                    local->dot11FailedCount);
 178 DEBUGFS_STATS_FILE(retry_count, 20, "%u",
 179                    local->dot11RetryCount);
 180 DEBUGFS_STATS_FILE(multiple_retry_count, 20, "%u",
 181                    local->dot11MultipleRetryCount);
 182 DEBUGFS_STATS_FILE(frame_duplicate_count, 20, "%u",
 183                    local->dot11FrameDuplicateCount);
 184 DEBUGFS_STATS_FILE(received_fragment_count, 20, "%u",
 185                    local->dot11ReceivedFragmentCount);
 186 DEBUGFS_STATS_FILE(multicast_received_frame_count, 20, "%u",
 187                    local->dot11MulticastReceivedFrameCount);
 188 DEBUGFS_STATS_FILE(transmitted_frame_count, 20, "%u",
 189                    local->dot11TransmittedFrameCount);
 190 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 191 DEBUGFS_STATS_FILE(tx_handlers_drop, 20, "%u",
 192                    local->tx_handlers_drop);
 193 DEBUGFS_STATS_FILE(tx_handlers_queued, 20, "%u",
 194                    local->tx_handlers_queued);
 195 DEBUGFS_STATS_FILE(tx_handlers_drop_unencrypted, 20, "%u",
 196                    local->tx_handlers_drop_unencrypted);
 197 DEBUGFS_STATS_FILE(tx_handlers_drop_fragment, 20, "%u",
 198                    local->tx_handlers_drop_fragment);
 199 DEBUGFS_STATS_FILE(tx_handlers_drop_wep, 20, "%u",
 200                    local->tx_handlers_drop_wep);
 201 DEBUGFS_STATS_FILE(tx_handlers_drop_not_assoc, 20, "%u",
 202                    local->tx_handlers_drop_not_assoc);
 203 DEBUGFS_STATS_FILE(tx_handlers_drop_unauth_port, 20, "%u",
 204                    local->tx_handlers_drop_unauth_port);
 205 DEBUGFS_STATS_FILE(rx_handlers_drop, 20, "%u",
 206                    local->rx_handlers_drop);
 207 DEBUGFS_STATS_FILE(rx_handlers_queued, 20, "%u",
 208                    local->rx_handlers_queued);
 209 DEBUGFS_STATS_FILE(rx_handlers_drop_nullfunc, 20, "%u",
 210                    local->rx_handlers_drop_nullfunc);
 211 DEBUGFS_STATS_FILE(rx_handlers_drop_defrag, 20, "%u",
 212                    local->rx_handlers_drop_defrag);
 213 DEBUGFS_STATS_FILE(rx_handlers_drop_short, 20, "%u",
 214                    local->rx_handlers_drop_short);
 215 DEBUGFS_STATS_FILE(rx_handlers_drop_passive_scan, 20, "%u",
 216                    local->rx_handlers_drop_passive_scan);
 217 DEBUGFS_STATS_FILE(tx_expand_skb_head, 20, "%u",
 218                    local->tx_expand_skb_head);
 219 DEBUGFS_STATS_FILE(tx_expand_skb_head_cloned, 20, "%u",
 220                    local->tx_expand_skb_head_cloned);
 221 DEBUGFS_STATS_FILE(rx_expand_skb_head, 20, "%u",
 222                    local->rx_expand_skb_head);
 223 DEBUGFS_STATS_FILE(rx_expand_skb_head2, 20, "%u",
 224                    local->rx_expand_skb_head2);
 225 DEBUGFS_STATS_FILE(rx_handlers_fragments, 20, "%u",
 226                    local->rx_handlers_fragments);
 227 DEBUGFS_STATS_FILE(tx_status_drop, 20, "%u",
 228                    local->tx_status_drop);
 229
 230 #endif
 231
 232 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
 233 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
 234 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
 235 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
 236
 237
 238 void debugfs_hw_add(struct ieee80211_local *local)
 239 {
 240         struct dentry *phyd = local->hw.wiphy->debugfsdir;
 241         struct dentry *statsd;
 242
 243         if (!phyd)
 244                 return;
 245
 246         local->debugfs.stations = debugfs_create_dir("stations", phyd);
 247         local->debugfs.keys = debugfs_create_dir("keys", phyd);
 248
 249         DEBUGFS_ADD(frequency);
 250         DEBUGFS_ADD(rts_threshold);
 251         DEBUGFS_ADD(fragmentation_threshold);
 252         DEBUGFS_ADD(short_retry_limit);
 253         DEBUGFS_ADD(long_retry_limit);
 254         DEBUGFS_ADD(total_ps_buffered);
 255         DEBUGFS_ADD(wep_iv);
 256         DEBUGFS_ADD(tsf);
 257
 258         statsd = debugfs_create_dir("statistics", phyd);
 259         local->debugfs.statistics = statsd;
 260
 261         /* if the dir failed, don't put all the other things into the root! */
 262         if (!statsd)
 263                 return;
 264
 265         DEBUGFS_STATS_ADD(transmitted_fragment_count);
 266         DEBUGFS_STATS_ADD(multicast_transmitted_frame_count);
 267         DEBUGFS_STATS_ADD(failed_count);
 268         DEBUGFS_STATS_ADD(retry_count);
 269         DEBUGFS_STATS_ADD(multiple_retry_count);
 270         DEBUGFS_STATS_ADD(frame_duplicate_count);
 271         DEBUGFS_STATS_ADD(received_fragment_count);
 272         DEBUGFS_STATS_ADD(multicast_received_frame_count);
 273         DEBUGFS_STATS_ADD(transmitted_frame_count);
 274 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 275         DEBUGFS_STATS_ADD(tx_handlers_drop);
 276         DEBUGFS_STATS_ADD(tx_handlers_queued);
 277         DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted);
 278         DEBUGFS_STATS_ADD(tx_handlers_drop_fragment);
 279         DEBUGFS_STATS_ADD(tx_handlers_drop_wep);
 280         DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc);
 281         DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port);
 282         DEBUGFS_STATS_ADD(rx_handlers_drop);
 283         DEBUGFS_STATS_ADD(rx_handlers_queued);
 284         DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc);
 285         DEBUGFS_STATS_ADD(rx_handlers_drop_defrag);
 286         DEBUGFS_STATS_ADD(rx_handlers_drop_short);
 287         DEBUGFS_STATS_ADD(rx_handlers_drop_passive_scan);
 288         DEBUGFS_STATS_ADD(tx_expand_skb_head);
 289         DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned);
 290         DEBUGFS_STATS_ADD(rx_expand_skb_head);
 291         DEBUGFS_STATS_ADD(rx_expand_skb_head2);
 292         DEBUGFS_STATS_ADD(rx_handlers_fragments);
 293         DEBUGFS_STATS_ADD(tx_status_drop);
 294 #endif
 295         DEBUGFS_STATS_ADD(dot11ACKFailureCount);
 296         DEBUGFS_STATS_ADD(dot11RTSFailureCount);
 297         DEBUGFS_STATS_ADD(dot11FCSErrorCount);
 298         DEBUGFS_STATS_ADD(dot11RTSSuccessCount);
 299 }
 300
 301 void debugfs_hw_del(struct ieee80211_local *local)
 302 {
 303         DEBUGFS_DEL(frequency);
 304         DEBUGFS_DEL(rts_threshold);
 305         DEBUGFS_DEL(fragmentation_threshold);
 306         DEBUGFS_DEL(short_retry_limit);
 307         DEBUGFS_DEL(long_retry_limit);
 308         DEBUGFS_DEL(total_ps_buffered);
 309         DEBUGFS_DEL(wep_iv);
 310         DEBUGFS_DEL(tsf);
 311
 312         DEBUGFS_STATS_DEL(transmitted_fragment_count);
 313         DEBUGFS_STATS_DEL(multicast_transmitted_frame_count);
 314         DEBUGFS_STATS_DEL(failed_count);
 315         DEBUGFS_STATS_DEL(retry_count);
 316         DEBUGFS_STATS_DEL(multiple_retry_count);
 317         DEBUGFS_STATS_DEL(frame_duplicate_count);
 318         DEBUGFS_STATS_DEL(received_fragment_count);
 319         DEBUGFS_STATS_DEL(multicast_received_frame_count);
 320         DEBUGFS_STATS_DEL(transmitted_frame_count);
 321         DEBUGFS_STATS_DEL(num_scans);
 322 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 323         DEBUGFS_STATS_DEL(tx_handlers_drop);
 324         DEBUGFS_STATS_DEL(tx_handlers_queued);
 325         DEBUGFS_STATS_DEL(tx_handlers_drop_unencrypted);
 326         DEBUGFS_STATS_DEL(tx_handlers_drop_fragment);
 327         DEBUGFS_STATS_DEL(tx_handlers_drop_wep);
 328         DEBUGFS_STATS_DEL(tx_handlers_drop_not_assoc);
 329         DEBUGFS_STATS_DEL(tx_handlers_drop_unauth_port);
 330         DEBUGFS_STATS_DEL(rx_handlers_drop);
 331         DEBUGFS_STATS_DEL(rx_handlers_queued);
 332         DEBUGFS_STATS_DEL(rx_handlers_drop_nullfunc);
 333         DEBUGFS_STATS_DEL(rx_handlers_drop_defrag);
 334         DEBUGFS_STATS_DEL(rx_handlers_drop_short);
 335         DEBUGFS_STATS_DEL(rx_handlers_drop_passive_scan);
 336         DEBUGFS_STATS_DEL(tx_expand_skb_head);
 337         DEBUGFS_STATS_DEL(tx_expand_skb_head_cloned);
 338         DEBUGFS_STATS_DEL(rx_expand_skb_head);
 339         DEBUGFS_STATS_DEL(rx_expand_skb_head2);
 340         DEBUGFS_STATS_DEL(rx_handlers_fragments);
 341         DEBUGFS_STATS_DEL(tx_status_drop);
 342 #endif
 343         DEBUGFS_STATS_DEL(dot11ACKFailureCount);
 344         DEBUGFS_STATS_DEL(dot11RTSFailureCount);
 345         DEBUGFS_STATS_DEL(dot11FCSErrorCount);
 346         DEBUGFS_STATS_DEL(dot11RTSSuccessCount);
 347
 348         debugfs_remove(local->debugfs.statistics);
 349         local->debugfs.statistics = NULL;
 350         debugfs_remove(local->debugfs.stations);
 351         local->debugfs.stations = NULL;
 352         debugfs_remove(local->debugfs.keys);
 353         local->debugfs.keys = NULL;
 354 }