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_FORMAT_BUFFER_SIZE 100
  25
  26 int mac80211_format_buffer(char __user *userbuf, size_t count,
  27                                   loff_t *ppos, char *fmt, ...)
  28 {
  29         va_list args;
  30         char buf[DEBUGFS_FORMAT_BUFFER_SIZE];
  31         int res;
  32
  33         va_start(args, fmt);
  34         res = vscnprintf(buf, sizeof(buf), fmt, args);
  35         va_end(args);
  36
  37         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
  38 }
  39
  40 #define DEBUGFS_READONLY_FILE_FN(name, fmt, value...)                   \
  41 static ssize_t name## _read(struct file *file, char __user *userbuf,    \
  42                             size_t count, loff_t *ppos)                 \
  43 {                                                                       \
  44         struct ieee80211_local *local = file->private_data;             \
  45                                                                         \
  46         return mac80211_format_buffer(userbuf, count, ppos,             \
  47                                       fmt "\n", ##value);               \
  48 }
  49
  50 #define DEBUGFS_READONLY_FILE_OPS(name)                 \
  51 static const struct file_operations name## _ops = {                     \
  52         .read = name## _read,                                           \
  53         .open = mac80211_open_file_generic,                             \
  54         .llseek = generic_file_llseek,                                  \
  55 };
  56
  57 #define DEBUGFS_READONLY_FILE(name, fmt, value...)              \
  58         DEBUGFS_READONLY_FILE_FN(name, fmt, value)              \
  59         DEBUGFS_READONLY_FILE_OPS(name)
  60
  61 #define DEBUGFS_ADD(name)                                               \
  62         debugfs_create_file(#name, 0400, phyd, local, &name## _ops);
  63
  64 #define DEBUGFS_ADD_MODE(name, mode)                                    \
  65         debugfs_create_file(#name, mode, phyd, local, &name## _ops);
  66
  67
  68 DEBUGFS_READONLY_FILE(user_power, "%d",
  69                       local->user_power_level);
  70 DEBUGFS_READONLY_FILE(power, "%d",
  71                       local->hw.conf.power_level);
  72 DEBUGFS_READONLY_FILE(frequency, "%d",
  73                       local->hw.conf.channel->center_freq);
  74 DEBUGFS_READONLY_FILE(total_ps_buffered, "%d",
  75                       local->total_ps_buffered);
  76 DEBUGFS_READONLY_FILE(wep_iv, "%#08x",
  77                       local->wep_iv & 0xffffff);
  78 DEBUGFS_READONLY_FILE(rate_ctrl_alg, "%s",
  79         local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver");
  80
  81 static ssize_t reset_write(struct file *file, const char __user *user_buf,
  82                            size_t count, loff_t *ppos)
  83 {
  84         struct ieee80211_local *local = file->private_data;
  85
  86         rtnl_lock();
  87         __ieee80211_suspend(&local->hw, NULL);
  88         __ieee80211_resume(&local->hw);
  89         rtnl_unlock();
  90
  91         return count;
  92 }
  93
  94 static const struct file_operations reset_ops = {
  95         .write = reset_write,
  96         .open = mac80211_open_file_generic,
  97         .llseek = noop_llseek,
  98 };
  99
 100 static ssize_t channel_type_read(struct file *file, char __user *user_buf,
 101                        size_t count, loff_t *ppos)
 102 {
 103         struct ieee80211_local *local = file->private_data;
 104         const char *buf;
 105
 106         switch (local->hw.conf.channel_type) {
 107         case NL80211_CHAN_NO_HT:
 108                 buf = "no ht\n";
 109                 break;
 110         case NL80211_CHAN_HT20:
 111                 buf = "ht20\n";
 112                 break;
 113         case NL80211_CHAN_HT40MINUS:
 114                 buf = "ht40-\n";
 115                 break;
 116         case NL80211_CHAN_HT40PLUS:
 117                 buf = "ht40+\n";
 118                 break;
 119         default:
 120                 buf = "???";
 121                 break;
 122         }
 123
 124         return simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
 125 }
 126
 127 static ssize_t hwflags_read(struct file *file, char __user *user_buf,
 128                             size_t count, loff_t *ppos)
 129 {
 130         struct ieee80211_local *local = file->private_data;
 131         int mxln = 500;
 132         ssize_t rv;
 133         char *buf = kzalloc(mxln, GFP_KERNEL);
 134         int sf = 0; /* how many written so far */
 135
 136         if (!buf)
 137                 return 0;
 138
 139         sf += snprintf(buf, mxln - sf, "0x%x\n", local->hw.flags);
 140         if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)
 141                 sf += snprintf(buf + sf, mxln - sf, "HAS_RATE_CONTROL\n");
 142         if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS)
 143                 sf += snprintf(buf + sf, mxln - sf, "RX_INCLUDES_FCS\n");
 144         if (local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING)
 145                 sf += snprintf(buf + sf, mxln - sf,
 146                                "HOST_BCAST_PS_BUFFERING\n");
 147         if (local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)
 148                 sf += snprintf(buf + sf, mxln - sf,
 149                                "2GHZ_SHORT_SLOT_INCAPABLE\n");
 150         if (local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)
 151                 sf += snprintf(buf + sf, mxln - sf,
 152                                "2GHZ_SHORT_PREAMBLE_INCAPABLE\n");
 153         if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
 154                 sf += snprintf(buf + sf, mxln - sf, "SIGNAL_UNSPEC\n");
 155         if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
 156                 sf += snprintf(buf + sf, mxln - sf, "SIGNAL_DBM\n");
 157         if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
 158                 sf += snprintf(buf + sf, mxln - sf, "NEED_DTIM_PERIOD\n");
 159         if (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)
 160                 sf += snprintf(buf + sf, mxln - sf, "SPECTRUM_MGMT\n");
 161         if (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION)
 162                 sf += snprintf(buf + sf, mxln - sf, "AMPDU_AGGREGATION\n");
 163         if (local->hw.flags & IEEE80211_HW_SUPPORTS_PS)
 164                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_PS\n");
 165         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
 166                 sf += snprintf(buf + sf, mxln - sf, "PS_NULLFUNC_STACK\n");
 167         if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)
 168                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_DYNAMIC_PS\n");
 169         if (local->hw.flags & IEEE80211_HW_MFP_CAPABLE)
 170                 sf += snprintf(buf + sf, mxln - sf, "MFP_CAPABLE\n");
 171         if (local->hw.flags & IEEE80211_HW_SUPPORTS_STATIC_SMPS)
 172                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_STATIC_SMPS\n");
 173         if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
 174                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_DYNAMIC_SMPS\n");
 175         if (local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
 176                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_UAPSD\n");
 177         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
 178                 sf += snprintf(buf + sf, mxln - sf, "REPORTS_TX_ACK_STATUS\n");
 179         if (local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
 180                 sf += snprintf(buf + sf, mxln - sf, "CONNECTION_MONITOR\n");
 181         if (local->hw.flags & IEEE80211_HW_SUPPORTS_PER_STA_GTK)
 182                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_PER_STA_GTK\n");
 183         if (local->hw.flags & IEEE80211_HW_AP_LINK_PS)
 184                 sf += snprintf(buf + sf, mxln - sf, "AP_LINK_PS\n");
 185         if (local->hw.flags & IEEE80211_HW_TX_AMPDU_SETUP_IN_HW)
 186                 sf += snprintf(buf + sf, mxln - sf, "TX_AMPDU_SETUP_IN_HW\n");
 187         if (local->hw.flags & IEEE80211_HW_SCAN_WHILE_IDLE)
 188                 sf += snprintf(buf + sf, mxln - sf, "SCAN_WHILE_IDLE\n");
 189
 190         rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
 191         kfree(buf);
 192         return rv;
 193 }
 194
 195 static ssize_t queues_read(struct file *file, char __user *user_buf,
 196                            size_t count, loff_t *ppos)
 197 {
 198         struct ieee80211_local *local = file->private_data;
 199         unsigned long flags;
 200         char buf[IEEE80211_MAX_QUEUES * 20];
 201         int q, res = 0;
 202
 203         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 204         for (q = 0; q < local->hw.queues; q++)
 205                 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,
 206                                 local->queue_stop_reasons[q],
 207                                 skb_queue_len(&local->pending[q]));
 208         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 209
 210         return simple_read_from_buffer(user_buf, count, ppos, buf, res);
 211 }
 212
 213 DEBUGFS_READONLY_FILE_OPS(hwflags);
 214 DEBUGFS_READONLY_FILE_OPS(channel_type);
 215 DEBUGFS_READONLY_FILE_OPS(queues);
 216
 217 /* statistics stuff */
 218
 219 static ssize_t format_devstat_counter(struct ieee80211_local *local,
 220         char __user *userbuf,
 221         size_t count, loff_t *ppos,
 222         int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
 223                           int buflen))
 224 {
 225         struct ieee80211_low_level_stats stats;
 226         char buf[20];
 227         int res;
 228
 229         rtnl_lock();
 230         res = drv_get_stats(local, &stats);
 231         rtnl_unlock();
 232         if (res)
 233                 return res;
 234         res = printvalue(&stats, buf, sizeof(buf));
 235         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
 236 }
 237
 238 #define DEBUGFS_DEVSTATS_FILE(name)                                     \
 239 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
 240                                  char *buf, int buflen)                 \
 241 {                                                                       \
 242         return scnprintf(buf, buflen, "%u\n", stats->name);             \
 243 }                                                                       \
 244 static ssize_t stats_ ##name## _read(struct file *file,                 \
 245                                      char __user *userbuf,              \
 246                                      size_t count, loff_t *ppos)        \
 247 {                                                                       \
 248         return format_devstat_counter(file->private_data,               \
 249                                       userbuf,                          \
 250                                       count,                            \
 251                                       ppos,                             \
 252                                       print_devstats_##name);           \
 253 }                                                                       \
 254                                                                         \
 255 static const struct file_operations stats_ ##name## _ops = {            \
 256         .read = stats_ ##name## _read,                                  \
 257         .open = mac80211_open_file_generic,                             \
 258         .llseek = generic_file_llseek,                                  \
 259 };
 260
 261 #define DEBUGFS_STATS_ADD(name, field)                                  \
 262         debugfs_create_u32(#name, 0400, statsd, (u32 *) &field);
 263 #define DEBUGFS_DEVSTATS_ADD(name)                                      \
 264         debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops);
 265
 266 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
 267 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
 268 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
 269 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
 270
 271 void debugfs_hw_add(struct ieee80211_local *local)
 272 {
 273         struct dentry *phyd = local->hw.wiphy->debugfsdir;
 274         struct dentry *statsd;
 275
 276         if (!phyd)
 277                 return;
 278
 279         local->debugfs.keys = debugfs_create_dir("keys", phyd);
 280
 281         DEBUGFS_ADD(frequency);
 282         DEBUGFS_ADD(total_ps_buffered);
 283         DEBUGFS_ADD(wep_iv);
 284         DEBUGFS_ADD(queues);
 285         DEBUGFS_ADD_MODE(reset, 0200);
 286         DEBUGFS_ADD(channel_type);
 287         DEBUGFS_ADD(hwflags);
 288         DEBUGFS_ADD(user_power);
 289         DEBUGFS_ADD(power);
 290
 291         statsd = debugfs_create_dir("statistics", phyd);
 292
 293         /* if the dir failed, don't put all the other things into the root! */
 294         if (!statsd)
 295                 return;
 296
 297         DEBUGFS_STATS_ADD(transmitted_fragment_count,
 298                 local->dot11TransmittedFragmentCount);
 299         DEBUGFS_STATS_ADD(multicast_transmitted_frame_count,
 300                 local->dot11MulticastTransmittedFrameCount);
 301         DEBUGFS_STATS_ADD(failed_count, local->dot11FailedCount);
 302         DEBUGFS_STATS_ADD(retry_count, local->dot11RetryCount);
 303         DEBUGFS_STATS_ADD(multiple_retry_count,
 304                 local->dot11MultipleRetryCount);
 305         DEBUGFS_STATS_ADD(frame_duplicate_count,
 306                 local->dot11FrameDuplicateCount);
 307         DEBUGFS_STATS_ADD(received_fragment_count,
 308                 local->dot11ReceivedFragmentCount);
 309         DEBUGFS_STATS_ADD(multicast_received_frame_count,
 310                 local->dot11MulticastReceivedFrameCount);
 311         DEBUGFS_STATS_ADD(transmitted_frame_count,
 312                 local->dot11TransmittedFrameCount);
 313 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 314         DEBUGFS_STATS_ADD(tx_handlers_drop, local->tx_handlers_drop);
 315         DEBUGFS_STATS_ADD(tx_handlers_queued, local->tx_handlers_queued);
 316         DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted,
 317                 local->tx_handlers_drop_unencrypted);
 318         DEBUGFS_STATS_ADD(tx_handlers_drop_fragment,
 319                 local->tx_handlers_drop_fragment);
 320         DEBUGFS_STATS_ADD(tx_handlers_drop_wep,
 321                 local->tx_handlers_drop_wep);
 322         DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc,
 323                 local->tx_handlers_drop_not_assoc);
 324         DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port,
 325                 local->tx_handlers_drop_unauth_port);
 326         DEBUGFS_STATS_ADD(rx_handlers_drop, local->rx_handlers_drop);
 327         DEBUGFS_STATS_ADD(rx_handlers_queued, local->rx_handlers_queued);
 328         DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc,
 329                 local->rx_handlers_drop_nullfunc);
 330         DEBUGFS_STATS_ADD(rx_handlers_drop_defrag,
 331                 local->rx_handlers_drop_defrag);
 332         DEBUGFS_STATS_ADD(rx_handlers_drop_short,
 333                 local->rx_handlers_drop_short);
 334         DEBUGFS_STATS_ADD(rx_handlers_drop_passive_scan,
 335                 local->rx_handlers_drop_passive_scan);
 336         DEBUGFS_STATS_ADD(tx_expand_skb_head,
 337                 local->tx_expand_skb_head);
 338         DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned,
 339                 local->tx_expand_skb_head_cloned);
 340         DEBUGFS_STATS_ADD(rx_expand_skb_head,
 341                 local->rx_expand_skb_head);
 342         DEBUGFS_STATS_ADD(rx_expand_skb_head2,
 343                 local->rx_expand_skb_head2);
 344         DEBUGFS_STATS_ADD(rx_handlers_fragments,
 345                 local->rx_handlers_fragments);
 346         DEBUGFS_STATS_ADD(tx_status_drop,
 347                 local->tx_status_drop);
 348 #endif
 349         DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount);
 350         DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount);
 351         DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount);
 352         DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount);
 353 }