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(total_ps_buffered, "%d",
  67                       local->total_ps_buffered);
  68 DEBUGFS_READONLY_FILE(wep_iv, "%#08x",
  69                       local->wep_iv & 0xffffff);
  70 DEBUGFS_READONLY_FILE(rate_ctrl_alg, "%s",
  71         local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver");
  72
  73 #ifdef CONFIG_PM
  74 static ssize_t reset_write(struct file *file, const char __user *user_buf,
  75                            size_t count, loff_t *ppos)
  76 {
  77         struct ieee80211_local *local = file->private_data;
  78
  79         rtnl_lock();
  80         __ieee80211_suspend(&local->hw, NULL);
  81         __ieee80211_resume(&local->hw);
  82         rtnl_unlock();
  83
  84         return count;
  85 }
  86
  87 static const struct file_operations reset_ops = {
  88         .write = reset_write,
  89         .open = simple_open,
  90         .llseek = noop_llseek,
  91 };
  92 #endif
  93
  94 static ssize_t hwflags_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         int mxln = 500;
  99         ssize_t rv;
 100         char *buf = kzalloc(mxln, GFP_KERNEL);
 101         int sf = 0; /* how many written so far */
 102
 103         if (!buf)
 104                 return 0;
 105
 106         sf += scnprintf(buf, mxln - sf, "0x%x\n", local->hw.flags);
 107         if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)
 108                 sf += scnprintf(buf + sf, mxln - sf, "HAS_RATE_CONTROL\n");
 109         if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS)
 110                 sf += scnprintf(buf + sf, mxln - sf, "RX_INCLUDES_FCS\n");
 111         if (local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING)
 112                 sf += scnprintf(buf + sf, mxln - sf,
 113                                 "HOST_BCAST_PS_BUFFERING\n");
 114         if (local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)
 115                 sf += scnprintf(buf + sf, mxln - sf,
 116                                 "2GHZ_SHORT_SLOT_INCAPABLE\n");
 117         if (local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)
 118                 sf += scnprintf(buf + sf, mxln - sf,
 119                                 "2GHZ_SHORT_PREAMBLE_INCAPABLE\n");
 120         if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
 121                 sf += scnprintf(buf + sf, mxln - sf, "SIGNAL_UNSPEC\n");
 122         if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
 123                 sf += scnprintf(buf + sf, mxln - sf, "SIGNAL_DBM\n");
 124         if (local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC)
 125                 sf += scnprintf(buf + sf, mxln - sf,
 126                                 "NEED_DTIM_BEFORE_ASSOC\n");
 127         if (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)
 128                 sf += scnprintf(buf + sf, mxln - sf, "SPECTRUM_MGMT\n");
 129         if (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION)
 130                 sf += scnprintf(buf + sf, mxln - sf, "AMPDU_AGGREGATION\n");
 131         if (local->hw.flags & IEEE80211_HW_SUPPORTS_PS)
 132                 sf += scnprintf(buf + sf, mxln - sf, "SUPPORTS_PS\n");
 133         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
 134                 sf += scnprintf(buf + sf, mxln - sf, "PS_NULLFUNC_STACK\n");
 135         if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)
 136                 sf += scnprintf(buf + sf, mxln - sf, "SUPPORTS_DYNAMIC_PS\n");
 137         if (local->hw.flags & IEEE80211_HW_MFP_CAPABLE)
 138                 sf += scnprintf(buf + sf, mxln - sf, "MFP_CAPABLE\n");
 139         if (local->hw.flags & IEEE80211_HW_SUPPORTS_STATIC_SMPS)
 140                 sf += scnprintf(buf + sf, mxln - sf, "SUPPORTS_STATIC_SMPS\n");
 141         if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
 142                 sf += scnprintf(buf + sf, mxln - sf,
 143                                 "SUPPORTS_DYNAMIC_SMPS\n");
 144         if (local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
 145                 sf += scnprintf(buf + sf, mxln - sf, "SUPPORTS_UAPSD\n");
 146         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
 147                 sf += scnprintf(buf + sf, mxln - sf,
 148                                 "REPORTS_TX_ACK_STATUS\n");
 149         if (local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
 150                 sf += scnprintf(buf + sf, mxln - sf, "CONNECTION_MONITOR\n");
 151         if (local->hw.flags & IEEE80211_HW_SUPPORTS_PER_STA_GTK)
 152                 sf += scnprintf(buf + sf, mxln - sf, "SUPPORTS_PER_STA_GTK\n");
 153         if (local->hw.flags & IEEE80211_HW_AP_LINK_PS)
 154                 sf += scnprintf(buf + sf, mxln - sf, "AP_LINK_PS\n");
 155         if (local->hw.flags & IEEE80211_HW_TX_AMPDU_SETUP_IN_HW)
 156                 sf += scnprintf(buf + sf, mxln - sf, "TX_AMPDU_SETUP_IN_HW\n");
 157
 158         rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
 159         kfree(buf);
 160         return rv;
 161 }
 162
 163 static ssize_t queues_read(struct file *file, char __user *user_buf,
 164                            size_t count, loff_t *ppos)
 165 {
 166         struct ieee80211_local *local = file->private_data;
 167         unsigned long flags;
 168         char buf[IEEE80211_MAX_QUEUES * 20];
 169         int q, res = 0;
 170
 171         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 172         for (q = 0; q < local->hw.queues; q++)
 173                 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,
 174                                 local->queue_stop_reasons[q],
 175                                 skb_queue_len(&local->pending[q]));
 176         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 177
 178         return simple_read_from_buffer(user_buf, count, ppos, buf, res);
 179 }
 180
 181 DEBUGFS_READONLY_FILE_OPS(hwflags);
 182 DEBUGFS_READONLY_FILE_OPS(queues);
 183
 184 /* statistics stuff */
 185
 186 static ssize_t format_devstat_counter(struct ieee80211_local *local,
 187         char __user *userbuf,
 188         size_t count, loff_t *ppos,
 189         int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
 190                           int buflen))
 191 {
 192         struct ieee80211_low_level_stats stats;
 193         char buf[20];
 194         int res;
 195
 196         rtnl_lock();
 197         res = drv_get_stats(local, &stats);
 198         rtnl_unlock();
 199         if (res)
 200                 return res;
 201         res = printvalue(&stats, buf, sizeof(buf));
 202         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
 203 }
 204
 205 #define DEBUGFS_DEVSTATS_FILE(name)                                     \
 206 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
 207                                  char *buf, int buflen)                 \
 208 {                                                                       \
 209         return scnprintf(buf, buflen, "%u\n", stats->name);             \
 210 }                                                                       \
 211 static ssize_t stats_ ##name## _read(struct file *file,                 \
 212                                      char __user *userbuf,              \
 213                                      size_t count, loff_t *ppos)        \
 214 {                                                                       \
 215         return format_devstat_counter(file->private_data,               \
 216                                       userbuf,                          \
 217                                       count,                            \
 218                                       ppos,                             \
 219                                       print_devstats_##name);           \
 220 }                                                                       \
 221                                                                         \
 222 static const struct file_operations stats_ ##name## _ops = {            \
 223         .read = stats_ ##name## _read,                                  \
 224         .open = simple_open,                                            \
 225         .llseek = generic_file_llseek,                                  \
 226 };
 227
 228 #define DEBUGFS_STATS_ADD(name, field)                                  \
 229         debugfs_create_u32(#name, 0400, statsd, (u32 *) &field);
 230 #define DEBUGFS_DEVSTATS_ADD(name)                                      \
 231         debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops);
 232
 233 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
 234 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
 235 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
 236 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
 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.keys = debugfs_create_dir("keys", phyd);
 247
 248         DEBUGFS_ADD(total_ps_buffered);
 249         DEBUGFS_ADD(wep_iv);
 250         DEBUGFS_ADD(queues);
 251 #ifdef CONFIG_PM
 252         DEBUGFS_ADD_MODE(reset, 0200);
 253 #endif
 254         DEBUGFS_ADD(hwflags);
 255         DEBUGFS_ADD(user_power);
 256         DEBUGFS_ADD(power);
 257
 258         statsd = debugfs_create_dir("statistics", phyd);
 259
 260         /* if the dir failed, don't put all the other things into the root! */
 261         if (!statsd)
 262                 return;
 263
 264         DEBUGFS_STATS_ADD(transmitted_fragment_count,
 265                 local->dot11TransmittedFragmentCount);
 266         DEBUGFS_STATS_ADD(multicast_transmitted_frame_count,
 267                 local->dot11MulticastTransmittedFrameCount);
 268         DEBUGFS_STATS_ADD(failed_count, local->dot11FailedCount);
 269         DEBUGFS_STATS_ADD(retry_count, local->dot11RetryCount);
 270         DEBUGFS_STATS_ADD(multiple_retry_count,
 271                 local->dot11MultipleRetryCount);
 272         DEBUGFS_STATS_ADD(frame_duplicate_count,
 273                 local->dot11FrameDuplicateCount);
 274         DEBUGFS_STATS_ADD(received_fragment_count,
 275                 local->dot11ReceivedFragmentCount);
 276         DEBUGFS_STATS_ADD(multicast_received_frame_count,
 277                 local->dot11MulticastReceivedFrameCount);
 278         DEBUGFS_STATS_ADD(transmitted_frame_count,
 279                 local->dot11TransmittedFrameCount);
 280 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 281         DEBUGFS_STATS_ADD(tx_handlers_drop, local->tx_handlers_drop);
 282         DEBUGFS_STATS_ADD(tx_handlers_queued, local->tx_handlers_queued);
 283         DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted,
 284                 local->tx_handlers_drop_unencrypted);
 285         DEBUGFS_STATS_ADD(tx_handlers_drop_fragment,
 286                 local->tx_handlers_drop_fragment);
 287         DEBUGFS_STATS_ADD(tx_handlers_drop_wep,
 288                 local->tx_handlers_drop_wep);
 289         DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc,
 290                 local->tx_handlers_drop_not_assoc);
 291         DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port,
 292                 local->tx_handlers_drop_unauth_port);
 293         DEBUGFS_STATS_ADD(rx_handlers_drop, local->rx_handlers_drop);
 294         DEBUGFS_STATS_ADD(rx_handlers_queued, local->rx_handlers_queued);
 295         DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc,
 296                 local->rx_handlers_drop_nullfunc);
 297         DEBUGFS_STATS_ADD(rx_handlers_drop_defrag,
 298                 local->rx_handlers_drop_defrag);
 299         DEBUGFS_STATS_ADD(rx_handlers_drop_short,
 300                 local->rx_handlers_drop_short);
 301         DEBUGFS_STATS_ADD(tx_expand_skb_head,
 302                 local->tx_expand_skb_head);
 303         DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned,
 304                 local->tx_expand_skb_head_cloned);
 305         DEBUGFS_STATS_ADD(rx_expand_skb_head,
 306                 local->rx_expand_skb_head);
 307         DEBUGFS_STATS_ADD(rx_expand_skb_head2,
 308                 local->rx_expand_skb_head2);
 309         DEBUGFS_STATS_ADD(rx_handlers_fragments,
 310                 local->rx_handlers_fragments);
 311         DEBUGFS_STATS_ADD(tx_status_drop,
 312                 local->tx_status_drop);
 313 #endif
 314         DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount);
 315         DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount);
 316         DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount);
 317         DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount);
 318 }