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 #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(frequency, "%d",
  67                       local->hw.conf.channel->center_freq);
  68 DEBUGFS_READONLY_FILE(total_ps_buffered, "%d",
  69                       local->total_ps_buffered);
  70 DEBUGFS_READONLY_FILE(wep_iv, "%#08x",
  71                       local->wep_iv & 0xffffff);
  72 DEBUGFS_READONLY_FILE(rate_ctrl_alg, "%s",
  73         local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver");
  74
  75 static ssize_t reset_write(struct file *file, const char __user *user_buf,
  76                            size_t count, loff_t *ppos)
  77 {
  78         struct ieee80211_local *local = file->private_data;
  79
  80         rtnl_lock();
  81         __ieee80211_suspend(&local->hw, NULL);
  82         __ieee80211_resume(&local->hw);
  83         rtnl_unlock();
  84
  85         return count;
  86 }
  87
  88 static const struct file_operations reset_ops = {
  89         .write = reset_write,
  90         .open = simple_open,
  91         .llseek = noop_llseek,
  92 };
  93
  94 static ssize_t channel_type_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         const char *buf;
  99
 100         switch (local->hw.conf.channel_type) {
 101         case NL80211_CHAN_NO_HT:
 102                 buf = "no ht\n";
 103                 break;
 104         case NL80211_CHAN_HT20:
 105                 buf = "ht20\n";
 106                 break;
 107         case NL80211_CHAN_HT40MINUS:
 108                 buf = "ht40-\n";
 109                 break;
 110         case NL80211_CHAN_HT40PLUS:
 111                 buf = "ht40+\n";
 112                 break;
 113         default:
 114                 buf = "???";
 115                 break;
 116         }
 117
 118         return simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
 119 }
 120
 121 static ssize_t hwflags_read(struct file *file, char __user *user_buf,
 122                             size_t count, loff_t *ppos)
 123 {
 124         struct ieee80211_local *local = file->private_data;
 125         int mxln = 500;
 126         ssize_t rv;
 127         char *buf = kzalloc(mxln, GFP_KERNEL);
 128         int sf = 0; /* how many written so far */
 129
 130         if (!buf)
 131                 return 0;
 132
 133         sf += snprintf(buf, mxln - sf, "0x%x\n", local->hw.flags);
 134         if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)
 135                 sf += snprintf(buf + sf, mxln - sf, "HAS_RATE_CONTROL\n");
 136         if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS)
 137                 sf += snprintf(buf + sf, mxln - sf, "RX_INCLUDES_FCS\n");
 138         if (local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING)
 139                 sf += snprintf(buf + sf, mxln - sf,
 140                                "HOST_BCAST_PS_BUFFERING\n");
 141         if (local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)
 142                 sf += snprintf(buf + sf, mxln - sf,
 143                                "2GHZ_SHORT_SLOT_INCAPABLE\n");
 144         if (local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)
 145                 sf += snprintf(buf + sf, mxln - sf,
 146                                "2GHZ_SHORT_PREAMBLE_INCAPABLE\n");
 147         if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
 148                 sf += snprintf(buf + sf, mxln - sf, "SIGNAL_UNSPEC\n");
 149         if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
 150                 sf += snprintf(buf + sf, mxln - sf, "SIGNAL_DBM\n");
 151         if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
 152                 sf += snprintf(buf + sf, mxln - sf, "NEED_DTIM_PERIOD\n");
 153         if (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)
 154                 sf += snprintf(buf + sf, mxln - sf, "SPECTRUM_MGMT\n");
 155         if (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION)
 156                 sf += snprintf(buf + sf, mxln - sf, "AMPDU_AGGREGATION\n");
 157         if (local->hw.flags & IEEE80211_HW_SUPPORTS_PS)
 158                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_PS\n");
 159         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
 160                 sf += snprintf(buf + sf, mxln - sf, "PS_NULLFUNC_STACK\n");
 161         if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)
 162                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_DYNAMIC_PS\n");
 163         if (local->hw.flags & IEEE80211_HW_MFP_CAPABLE)
 164                 sf += snprintf(buf + sf, mxln - sf, "MFP_CAPABLE\n");
 165         if (local->hw.flags & IEEE80211_HW_SUPPORTS_STATIC_SMPS)
 166                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_STATIC_SMPS\n");
 167         if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
 168                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_DYNAMIC_SMPS\n");
 169         if (local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
 170                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_UAPSD\n");
 171         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
 172                 sf += snprintf(buf + sf, mxln - sf, "REPORTS_TX_ACK_STATUS\n");
 173         if (local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
 174                 sf += snprintf(buf + sf, mxln - sf, "CONNECTION_MONITOR\n");
 175         if (local->hw.flags & IEEE80211_HW_SUPPORTS_PER_STA_GTK)
 176                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_PER_STA_GTK\n");
 177         if (local->hw.flags & IEEE80211_HW_AP_LINK_PS)
 178                 sf += snprintf(buf + sf, mxln - sf, "AP_LINK_PS\n");
 179         if (local->hw.flags & IEEE80211_HW_TX_AMPDU_SETUP_IN_HW)
 180                 sf += snprintf(buf + sf, mxln - sf, "TX_AMPDU_SETUP_IN_HW\n");
 181         if (local->hw.flags & IEEE80211_HW_SCAN_WHILE_IDLE)
 182                 sf += snprintf(buf + sf, mxln - sf, "SCAN_WHILE_IDLE\n");
 183
 184         rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
 185         kfree(buf);
 186         return rv;
 187 }
 188
 189 static ssize_t queues_read(struct file *file, char __user *user_buf,
 190                            size_t count, loff_t *ppos)
 191 {
 192         struct ieee80211_local *local = file->private_data;
 193         unsigned long flags;
 194         char buf[IEEE80211_MAX_QUEUES * 20];
 195         int q, res = 0;
 196
 197         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 198         for (q = 0; q < local->hw.queues; q++)
 199                 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,
 200                                 local->queue_stop_reasons[q],
 201                                 skb_queue_len(&local->pending[q]));
 202         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 203
 204         return simple_read_from_buffer(user_buf, count, ppos, buf, res);
 205 }
 206
 207 DEBUGFS_READONLY_FILE_OPS(hwflags);
 208 DEBUGFS_READONLY_FILE_OPS(channel_type);
 209 DEBUGFS_READONLY_FILE_OPS(queues);
 210
 211 /* statistics stuff */
 212
 213 static ssize_t format_devstat_counter(struct ieee80211_local *local,
 214         char __user *userbuf,
 215         size_t count, loff_t *ppos,
 216         int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
 217                           int buflen))
 218 {
 219         struct ieee80211_low_level_stats stats;
 220         char buf[20];
 221         int res;
 222
 223         rtnl_lock();
 224         res = drv_get_stats(local, &stats);
 225         rtnl_unlock();
 226         if (res)
 227                 return res;
 228         res = printvalue(&stats, buf, sizeof(buf));
 229         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
 230 }
 231
 232 #define DEBUGFS_DEVSTATS_FILE(name)                                     \
 233 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
 234                                  char *buf, int buflen)                 \
 235 {                                                                       \
 236         return scnprintf(buf, buflen, "%u\n", stats->name);             \
 237 }                                                                       \
 238 static ssize_t stats_ ##name## _read(struct file *file,                 \
 239                                      char __user *userbuf,              \
 240                                      size_t count, loff_t *ppos)        \
 241 {                                                                       \
 242         return format_devstat_counter(file->private_data,               \
 243                                       userbuf,                          \
 244                                       count,                            \
 245                                       ppos,                             \
 246                                       print_devstats_##name);           \
 247 }                                                                       \
 248                                                                         \
 249 static const struct file_operations stats_ ##name## _ops = {            \
 250         .read = stats_ ##name## _read,                                  \
 251         .open = simple_open,                                            \
 252         .llseek = generic_file_llseek,                                  \
 253 };
 254
 255 #define DEBUGFS_STATS_ADD(name, field)                                  \
 256         debugfs_create_u32(#name, 0400, statsd, (u32 *) &field);
 257 #define DEBUGFS_DEVSTATS_ADD(name)                                      \
 258         debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops);
 259
 260 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
 261 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
 262 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
 263 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
 264
 265 void debugfs_hw_add(struct ieee80211_local *local)
 266 {
 267         struct dentry *phyd = local->hw.wiphy->debugfsdir;
 268         struct dentry *statsd;
 269
 270         if (!phyd)
 271                 return;
 272
 273         local->debugfs.keys = debugfs_create_dir("keys", phyd);
 274
 275         DEBUGFS_ADD(frequency);
 276         DEBUGFS_ADD(total_ps_buffered);
 277         DEBUGFS_ADD(wep_iv);
 278         DEBUGFS_ADD(queues);
 279         DEBUGFS_ADD_MODE(reset, 0200);
 280         DEBUGFS_ADD(channel_type);
 281         DEBUGFS_ADD(hwflags);
 282         DEBUGFS_ADD(user_power);
 283         DEBUGFS_ADD(power);
 284
 285         statsd = debugfs_create_dir("statistics", phyd);
 286
 287         /* if the dir failed, don't put all the other things into the root! */
 288         if (!statsd)
 289                 return;
 290
 291         DEBUGFS_STATS_ADD(transmitted_fragment_count,
 292                 local->dot11TransmittedFragmentCount);
 293         DEBUGFS_STATS_ADD(multicast_transmitted_frame_count,
 294                 local->dot11MulticastTransmittedFrameCount);
 295         DEBUGFS_STATS_ADD(failed_count, local->dot11FailedCount);
 296         DEBUGFS_STATS_ADD(retry_count, local->dot11RetryCount);
 297         DEBUGFS_STATS_ADD(multiple_retry_count,
 298                 local->dot11MultipleRetryCount);
 299         DEBUGFS_STATS_ADD(frame_duplicate_count,
 300                 local->dot11FrameDuplicateCount);
 301         DEBUGFS_STATS_ADD(received_fragment_count,
 302                 local->dot11ReceivedFragmentCount);
 303         DEBUGFS_STATS_ADD(multicast_received_frame_count,
 304                 local->dot11MulticastReceivedFrameCount);
 305         DEBUGFS_STATS_ADD(transmitted_frame_count,
 306                 local->dot11TransmittedFrameCount);
 307 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 308         DEBUGFS_STATS_ADD(tx_handlers_drop, local->tx_handlers_drop);
 309         DEBUGFS_STATS_ADD(tx_handlers_queued, local->tx_handlers_queued);
 310         DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted,
 311                 local->tx_handlers_drop_unencrypted);
 312         DEBUGFS_STATS_ADD(tx_handlers_drop_fragment,
 313                 local->tx_handlers_drop_fragment);
 314         DEBUGFS_STATS_ADD(tx_handlers_drop_wep,
 315                 local->tx_handlers_drop_wep);
 316         DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc,
 317                 local->tx_handlers_drop_not_assoc);
 318         DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port,
 319                 local->tx_handlers_drop_unauth_port);
 320         DEBUGFS_STATS_ADD(rx_handlers_drop, local->rx_handlers_drop);
 321         DEBUGFS_STATS_ADD(rx_handlers_queued, local->rx_handlers_queued);
 322         DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc,
 323                 local->rx_handlers_drop_nullfunc);
 324         DEBUGFS_STATS_ADD(rx_handlers_drop_defrag,
 325                 local->rx_handlers_drop_defrag);
 326         DEBUGFS_STATS_ADD(rx_handlers_drop_short,
 327                 local->rx_handlers_drop_short);
 328         DEBUGFS_STATS_ADD(tx_expand_skb_head,
 329                 local->tx_expand_skb_head);
 330         DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned,
 331                 local->tx_expand_skb_head_cloned);
 332         DEBUGFS_STATS_ADD(rx_expand_skb_head,
 333                 local->rx_expand_skb_head);
 334         DEBUGFS_STATS_ADD(rx_expand_skb_head2,
 335                 local->rx_expand_skb_head2);
 336         DEBUGFS_STATS_ADD(rx_handlers_fragments,
 337                 local->rx_handlers_fragments);
 338         DEBUGFS_STATS_ADD(tx_status_drop,
 339                 local->tx_status_drop);
 340 #endif
 341         DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount);
 342         DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount);
 343         DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount);
 344         DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount);
 345 }