net/mac80211/debugfs.c

   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 int mac80211_open_file_generic(struct inode *inode, struct file *file)
  19 {
  20         file->private_data = inode->i_private;
  21         return 0;
  22 }
  23
  24 #define DEBUGFS_READONLY_FILE(name, buflen, fmt, value...)              \
  25 static ssize_t name## _read(struct file *file, char __user *userbuf,    \
  26                             size_t count, loff_t *ppos)                 \
  27 {                                                                       \
  28         struct ieee80211_local *local = file->private_data;             \
  29         char buf[buflen];                                               \
  30         int res;                                                        \
  31                                                                         \
  32         res = scnprintf(buf, buflen, fmt "\n", ##value);                \
  33         return simple_read_from_buffer(userbuf, count, ppos, buf, res); \
  34 }                                                                       \
  35                                                                         \
  36 static const struct file_operations name## _ops = {                     \
  37         .read = name## _read,                                           \
  38         .open = mac80211_open_file_generic,                             \
  39 };
  40
  41 #define DEBUGFS_ADD(name)                                               \
  42         debugfs_create_file(#name, 0400, phyd, local, &name## _ops);
  43
  44 #define DEBUGFS_ADD_MODE(name, mode)                                    \
  45         debugfs_create_file(#name, mode, phyd, local, &name## _ops);
  46
  47
  48 DEBUGFS_READONLY_FILE(frequency, 20, "%d",
  49                       local->hw.conf.channel->center_freq);
  50 DEBUGFS_READONLY_FILE(total_ps_buffered, 20, "%d",
  51                       local->total_ps_buffered);
  52 DEBUGFS_READONLY_FILE(wep_iv, 20, "%#08x",
  53                       local->wep_iv & 0xffffff);
  54 DEBUGFS_READONLY_FILE(rate_ctrl_alg, 100, "%s",
  55         local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver");
  56
  57 static ssize_t tsf_read(struct file *file, char __user *user_buf,
  58                              size_t count, loff_t *ppos)
  59 {
  60         struct ieee80211_local *local = file->private_data;
  61         u64 tsf;
  62         char buf[100];
  63
  64         tsf = drv_get_tsf(local);
  65
  66         snprintf(buf, sizeof(buf), "0x%016llx\n", (unsigned long long) tsf);
  67
  68         return simple_read_from_buffer(user_buf, count, ppos, buf, 19);
  69 }
  70
  71 static ssize_t tsf_write(struct file *file,
  72                          const char __user *user_buf,
  73                          size_t count, loff_t *ppos)
  74 {
  75         struct ieee80211_local *local = file->private_data;
  76         unsigned long long tsf;
  77         char buf[100];
  78         size_t len;
  79
  80         len = min(count, sizeof(buf) - 1);
  81         if (copy_from_user(buf, user_buf, len))
  82                 return -EFAULT;
  83         buf[len] = '\0';
  84
  85         if (strncmp(buf, "reset", 5) == 0) {
  86                 if (local->ops->reset_tsf) {
  87                         drv_reset_tsf(local);
  88                         printk(KERN_INFO "%s: debugfs reset TSF\n", wiphy_name(local->hw.wiphy));
  89                 }
  90         } else {
  91                 tsf = simple_strtoul(buf, NULL, 0);
  92                 if (local->ops->set_tsf) {
  93                         drv_set_tsf(local, tsf);
  94                         printk(KERN_INFO "%s: debugfs set TSF to %#018llx\n", wiphy_name(local->hw.wiphy), tsf);
  95                 }
  96         }
  97
  98         return count;
  99 }
 100
 101 static const struct file_operations tsf_ops = {
 102         .read = tsf_read,
 103         .write = tsf_write,
 104         .open = mac80211_open_file_generic
 105 };
 106
 107 static ssize_t reset_write(struct file *file, const char __user *user_buf,
 108                            size_t count, loff_t *ppos)
 109 {
 110         struct ieee80211_local *local = file->private_data;
 111
 112         rtnl_lock();
 113         __ieee80211_suspend(&local->hw);
 114         __ieee80211_resume(&local->hw);
 115         rtnl_unlock();
 116
 117         return count;
 118 }
 119
 120 static const struct file_operations reset_ops = {
 121         .write = reset_write,
 122         .open = mac80211_open_file_generic,
 123 };
 124
 125 static ssize_t noack_read(struct file *file, char __user *user_buf,
 126                           size_t count, loff_t *ppos)
 127 {
 128         struct ieee80211_local *local = file->private_data;
 129         int res;
 130         char buf[10];
 131
 132         res = scnprintf(buf, sizeof(buf), "%d\n", local->wifi_wme_noack_test);
 133
 134         return simple_read_from_buffer(user_buf, count, ppos, buf, res);
 135 }
 136
 137 static ssize_t noack_write(struct file *file,
 138                            const char __user *user_buf,
 139                            size_t count, loff_t *ppos)
 140 {
 141         struct ieee80211_local *local = file->private_data;
 142         char buf[10];
 143         size_t len;
 144
 145         len = min(count, sizeof(buf) - 1);
 146         if (copy_from_user(buf, user_buf, len))
 147                 return -EFAULT;
 148         buf[len] = '\0';
 149
 150         local->wifi_wme_noack_test = !!simple_strtoul(buf, NULL, 0);
 151
 152         return count;
 153 }
 154
 155 static const struct file_operations noack_ops = {
 156         .read = noack_read,
 157         .write = noack_write,
 158         .open = mac80211_open_file_generic
 159 };
 160
 161 static ssize_t queues_read(struct file *file, char __user *user_buf,
 162                            size_t count, loff_t *ppos)
 163 {
 164         struct ieee80211_local *local = file->private_data;
 165         unsigned long flags;
 166         char buf[IEEE80211_MAX_QUEUES * 20];
 167         int q, res = 0;
 168
 169         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 170         for (q = 0; q < local->hw.queues; q++)
 171                 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,
 172                                 local->queue_stop_reasons[q],
 173                                 skb_queue_len(&local->pending[q]));
 174         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 175
 176         return simple_read_from_buffer(user_buf, count, ppos, buf, res);
 177 }
 178
 179 static const struct file_operations queues_ops = {
 180         .read = queues_read,
 181         .open = mac80211_open_file_generic
 182 };
 183
 184 /* statistics stuff */
 185
 186 #define DEBUGFS_STATS_FILE(name, buflen, fmt, value...)                 \
 187         DEBUGFS_READONLY_FILE(stats_ ##name, buflen, fmt, ##value)
 188
 189 static ssize_t format_devstat_counter(struct ieee80211_local *local,
 190         char __user *userbuf,
 191         size_t count, loff_t *ppos,
 192         int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
 193                           int buflen))
 194 {
 195         struct ieee80211_low_level_stats stats;
 196         char buf[20];
 197         int res;
 198
 199         rtnl_lock();
 200         res = drv_get_stats(local, &stats);
 201         rtnl_unlock();
 202         if (res)
 203                 return res;
 204         res = printvalue(&stats, buf, sizeof(buf));
 205         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
 206 }
 207
 208 #define DEBUGFS_DEVSTATS_FILE(name)                                     \
 209 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
 210                                  char *buf, int buflen)                 \
 211 {                                                                       \
 212         return scnprintf(buf, buflen, "%u\n", stats->name);             \
 213 }                                                                       \
 214 static ssize_t stats_ ##name## _read(struct file *file,                 \
 215                                      char __user *userbuf,              \
 216                                      size_t count, loff_t *ppos)        \
 217 {                                                                       \
 218         return format_devstat_counter(file->private_data,               \
 219                                       userbuf,                          \
 220                                       count,                            \
 221                                       ppos,                             \
 222                                       print_devstats_##name);           \
 223 }                                                                       \
 224                                                                         \
 225 static const struct file_operations stats_ ##name## _ops = {            \
 226         .read = stats_ ##name## _read,                                  \
 227         .open = mac80211_open_file_generic,                             \
 228 };
 229
 230 #define DEBUGFS_STATS_ADD(name)                                         \
 231         debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops);
 232
 233 DEBUGFS_STATS_FILE(transmitted_fragment_count, 20, "%u",
 234                    local->dot11TransmittedFragmentCount);
 235 DEBUGFS_STATS_FILE(multicast_transmitted_frame_count, 20, "%u",
 236                    local->dot11MulticastTransmittedFrameCount);
 237 DEBUGFS_STATS_FILE(failed_count, 20, "%u",
 238                    local->dot11FailedCount);
 239 DEBUGFS_STATS_FILE(retry_count, 20, "%u",
 240                    local->dot11RetryCount);
 241 DEBUGFS_STATS_FILE(multiple_retry_count, 20, "%u",
 242                    local->dot11MultipleRetryCount);
 243 DEBUGFS_STATS_FILE(frame_duplicate_count, 20, "%u",
 244                    local->dot11FrameDuplicateCount);
 245 DEBUGFS_STATS_FILE(received_fragment_count, 20, "%u",
 246                    local->dot11ReceivedFragmentCount);
 247 DEBUGFS_STATS_FILE(multicast_received_frame_count, 20, "%u",
 248                    local->dot11MulticastReceivedFrameCount);
 249 DEBUGFS_STATS_FILE(transmitted_frame_count, 20, "%u",
 250                    local->dot11TransmittedFrameCount);
 251 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 252 DEBUGFS_STATS_FILE(tx_handlers_drop, 20, "%u",
 253                    local->tx_handlers_drop);
 254 DEBUGFS_STATS_FILE(tx_handlers_queued, 20, "%u",
 255                    local->tx_handlers_queued);
 256 DEBUGFS_STATS_FILE(tx_handlers_drop_unencrypted, 20, "%u",
 257                    local->tx_handlers_drop_unencrypted);
 258 DEBUGFS_STATS_FILE(tx_handlers_drop_fragment, 20, "%u",
 259                    local->tx_handlers_drop_fragment);
 260 DEBUGFS_STATS_FILE(tx_handlers_drop_wep, 20, "%u",
 261                    local->tx_handlers_drop_wep);
 262 DEBUGFS_STATS_FILE(tx_handlers_drop_not_assoc, 20, "%u",
 263                    local->tx_handlers_drop_not_assoc);
 264 DEBUGFS_STATS_FILE(tx_handlers_drop_unauth_port, 20, "%u",
 265                    local->tx_handlers_drop_unauth_port);
 266 DEBUGFS_STATS_FILE(rx_handlers_drop, 20, "%u",
 267                    local->rx_handlers_drop);
 268 DEBUGFS_STATS_FILE(rx_handlers_queued, 20, "%u",
 269                    local->rx_handlers_queued);
 270 DEBUGFS_STATS_FILE(rx_handlers_drop_nullfunc, 20, "%u",
 271                    local->rx_handlers_drop_nullfunc);
 272 DEBUGFS_STATS_FILE(rx_handlers_drop_defrag, 20, "%u",
 273                    local->rx_handlers_drop_defrag);
 274 DEBUGFS_STATS_FILE(rx_handlers_drop_short, 20, "%u",
 275                    local->rx_handlers_drop_short);
 276 DEBUGFS_STATS_FILE(rx_handlers_drop_passive_scan, 20, "%u",
 277                    local->rx_handlers_drop_passive_scan);
 278 DEBUGFS_STATS_FILE(tx_expand_skb_head, 20, "%u",
 279                    local->tx_expand_skb_head);
 280 DEBUGFS_STATS_FILE(tx_expand_skb_head_cloned, 20, "%u",
 281                    local->tx_expand_skb_head_cloned);
 282 DEBUGFS_STATS_FILE(rx_expand_skb_head, 20, "%u",
 283                    local->rx_expand_skb_head);
 284 DEBUGFS_STATS_FILE(rx_expand_skb_head2, 20, "%u",
 285                    local->rx_expand_skb_head2);
 286 DEBUGFS_STATS_FILE(rx_handlers_fragments, 20, "%u",
 287                    local->rx_handlers_fragments);
 288 DEBUGFS_STATS_FILE(tx_status_drop, 20, "%u",
 289                    local->tx_status_drop);
 290
 291 #endif
 292
 293 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
 294 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
 295 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
 296 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
 297
 298
 299 void debugfs_hw_add(struct ieee80211_local *local)
 300 {
 301         struct dentry *phyd = local->hw.wiphy->debugfsdir;
 302         struct dentry *statsd;
 303
 304         if (!phyd)
 305                 return;
 306
 307         local->debugfs.stations = debugfs_create_dir("stations", phyd);
 308         local->debugfs.keys = debugfs_create_dir("keys", phyd);
 309
 310         DEBUGFS_ADD(frequency);
 311         DEBUGFS_ADD(total_ps_buffered);
 312         DEBUGFS_ADD(wep_iv);
 313         DEBUGFS_ADD(tsf);
 314         DEBUGFS_ADD(queues);
 315         DEBUGFS_ADD_MODE(reset, 0200);
 316         DEBUGFS_ADD(noack);
 317
 318         statsd = debugfs_create_dir("statistics", phyd);
 319
 320         /* if the dir failed, don't put all the other things into the root! */
 321         if (!statsd)
 322                 return;
 323
 324         DEBUGFS_STATS_ADD(transmitted_fragment_count);
 325         DEBUGFS_STATS_ADD(multicast_transmitted_frame_count);
 326         DEBUGFS_STATS_ADD(failed_count);
 327         DEBUGFS_STATS_ADD(retry_count);
 328         DEBUGFS_STATS_ADD(multiple_retry_count);
 329         DEBUGFS_STATS_ADD(frame_duplicate_count);
 330         DEBUGFS_STATS_ADD(received_fragment_count);
 331         DEBUGFS_STATS_ADD(multicast_received_frame_count);
 332         DEBUGFS_STATS_ADD(transmitted_frame_count);
 333 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 334         DEBUGFS_STATS_ADD(tx_handlers_drop);
 335         DEBUGFS_STATS_ADD(tx_handlers_queued);
 336         DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted);
 337         DEBUGFS_STATS_ADD(tx_handlers_drop_fragment);
 338         DEBUGFS_STATS_ADD(tx_handlers_drop_wep);
 339         DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc);
 340         DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port);
 341         DEBUGFS_STATS_ADD(rx_handlers_drop);
 342         DEBUGFS_STATS_ADD(rx_handlers_queued);
 343         DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc);
 344         DEBUGFS_STATS_ADD(rx_handlers_drop_defrag);
 345         DEBUGFS_STATS_ADD(rx_handlers_drop_short);
 346         DEBUGFS_STATS_ADD(rx_handlers_drop_passive_scan);
 347         DEBUGFS_STATS_ADD(tx_expand_skb_head);
 348         DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned);
 349         DEBUGFS_STATS_ADD(rx_expand_skb_head);
 350         DEBUGFS_STATS_ADD(rx_expand_skb_head2);
 351         DEBUGFS_STATS_ADD(rx_handlers_fragments);
 352         DEBUGFS_STATS_ADD(tx_status_drop);
 353 #endif
 354         DEBUGFS_STATS_ADD(dot11ACKFailureCount);
 355         DEBUGFS_STATS_ADD(dot11RTSFailureCount);
 356         DEBUGFS_STATS_ADD(dot11FCSErrorCount);
 357         DEBUGFS_STATS_ADD(dot11RTSSuccessCount);
 358 }