linux/net/mac80211/debugfs.c
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   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
  20int 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...)                   \
  35static 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)                 \
  45static 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
  62DEBUGFS_READONLY_FILE(user_power, "%d",
  63                      local->user_power_level);
  64DEBUGFS_READONLY_FILE(power, "%d",
  65                      local->hw.conf.power_level);
  66DEBUGFS_READONLY_FILE(total_ps_buffered, "%d",
  67                      local->total_ps_buffered);
  68DEBUGFS_READONLY_FILE(wep_iv, "%#08x",
  69                      local->wep_iv & 0xffffff);
  70DEBUGFS_READONLY_FILE(rate_ctrl_alg, "%s",
  71        local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver");
  72
  73#ifdef CONFIG_PM
  74static 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
  87static const struct file_operations reset_ops = {
  88        .write = reset_write,
  89        .open = simple_open,
  90        .llseek = noop_llseek,
  91};
  92#endif
  93
  94static 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 += snprintf(buf, mxln - sf, "0x%x\n", local->hw.flags);
 107        if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)
 108                sf += snprintf(buf + sf, mxln - sf, "HAS_RATE_CONTROL\n");
 109        if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS)
 110                sf += snprintf(buf + sf, mxln - sf, "RX_INCLUDES_FCS\n");
 111        if (local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING)
 112                sf += snprintf(buf + sf, mxln - sf,
 113                               "HOST_BCAST_PS_BUFFERING\n");
 114        if (local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)
 115                sf += snprintf(buf + sf, mxln - sf,
 116                               "2GHZ_SHORT_SLOT_INCAPABLE\n");
 117        if (local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)
 118                sf += snprintf(buf + sf, mxln - sf,
 119                               "2GHZ_SHORT_PREAMBLE_INCAPABLE\n");
 120        if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
 121                sf += snprintf(buf + sf, mxln - sf, "SIGNAL_UNSPEC\n");
 122        if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
 123                sf += snprintf(buf + sf, mxln - sf, "SIGNAL_DBM\n");
 124        if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
 125                sf += snprintf(buf + sf, mxln - sf, "NEED_DTIM_PERIOD\n");
 126        if (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)
 127                sf += snprintf(buf + sf, mxln - sf, "SPECTRUM_MGMT\n");
 128        if (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION)
 129                sf += snprintf(buf + sf, mxln - sf, "AMPDU_AGGREGATION\n");
 130        if (local->hw.flags & IEEE80211_HW_SUPPORTS_PS)
 131                sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_PS\n");
 132        if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
 133                sf += snprintf(buf + sf, mxln - sf, "PS_NULLFUNC_STACK\n");
 134        if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)
 135                sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_DYNAMIC_PS\n");
 136        if (local->hw.flags & IEEE80211_HW_MFP_CAPABLE)
 137                sf += snprintf(buf + sf, mxln - sf, "MFP_CAPABLE\n");
 138        if (local->hw.flags & IEEE80211_HW_SUPPORTS_STATIC_SMPS)
 139                sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_STATIC_SMPS\n");
 140        if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
 141                sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_DYNAMIC_SMPS\n");
 142        if (local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
 143                sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_UAPSD\n");
 144        if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
 145                sf += snprintf(buf + sf, mxln - sf, "REPORTS_TX_ACK_STATUS\n");
 146        if (local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
 147                sf += snprintf(buf + sf, mxln - sf, "CONNECTION_MONITOR\n");
 148        if (local->hw.flags & IEEE80211_HW_SUPPORTS_PER_STA_GTK)
 149                sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_PER_STA_GTK\n");
 150        if (local->hw.flags & IEEE80211_HW_AP_LINK_PS)
 151                sf += snprintf(buf + sf, mxln - sf, "AP_LINK_PS\n");
 152        if (local->hw.flags & IEEE80211_HW_TX_AMPDU_SETUP_IN_HW)
 153                sf += snprintf(buf + sf, mxln - sf, "TX_AMPDU_SETUP_IN_HW\n");
 154        if (local->hw.flags & IEEE80211_HW_SCAN_WHILE_IDLE)
 155                sf += snprintf(buf + sf, mxln - sf, "SCAN_WHILE_IDLE\n");
 156
 157        rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
 158        kfree(buf);
 159        return rv;
 160}
 161
 162static ssize_t queues_read(struct file *file, char __user *user_buf,
 163                           size_t count, loff_t *ppos)
 164{
 165        struct ieee80211_local *local = file->private_data;
 166        unsigned long flags;
 167        char buf[IEEE80211_MAX_QUEUES * 20];
 168        int q, res = 0;
 169
 170        spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 171        for (q = 0; q < local->hw.queues; q++)
 172                res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,
 173                                local->queue_stop_reasons[q],
 174                                skb_queue_len(&local->pending[q]));
 175        spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 176
 177        return simple_read_from_buffer(user_buf, count, ppos, buf, res);
 178}
 179
 180DEBUGFS_READONLY_FILE_OPS(hwflags);
 181DEBUGFS_READONLY_FILE_OPS(queues);
 182
 183/* statistics stuff */
 184
 185static ssize_t format_devstat_counter(struct ieee80211_local *local,
 186        char __user *userbuf,
 187        size_t count, loff_t *ppos,
 188        int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
 189                          int buflen))
 190{
 191        struct ieee80211_low_level_stats stats;
 192        char buf[20];
 193        int res;
 194
 195        rtnl_lock();
 196        res = drv_get_stats(local, &stats);
 197        rtnl_unlock();
 198        if (res)
 199                return res;
 200        res = printvalue(&stats, buf, sizeof(buf));
 201        return simple_read_from_buffer(userbuf, count, ppos, buf, res);
 202}
 203
 204#define DEBUGFS_DEVSTATS_FILE(name)                                     \
 205static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
 206                                 char *buf, int buflen)                 \
 207{                                                                       \
 208        return scnprintf(buf, buflen, "%u\n", stats->name);             \
 209}                                                                       \
 210static ssize_t stats_ ##name## _read(struct file *file,                 \
 211                                     char __user *userbuf,              \
 212                                     size_t count, loff_t *ppos)        \
 213{                                                                       \
 214        return format_devstat_counter(file->private_data,               \
 215                                      userbuf,                          \
 216                                      count,                            \
 217                                      ppos,                             \
 218                                      print_devstats_##name);           \
 219}                                                                       \
 220                                                                        \
 221static const struct file_operations stats_ ##name## _ops = {            \
 222        .read = stats_ ##name## _read,                                  \
 223        .open = simple_open,                                            \
 224        .llseek = generic_file_llseek,                                  \
 225};
 226
 227#define DEBUGFS_STATS_ADD(name, field)                                  \
 228        debugfs_create_u32(#name, 0400, statsd, (u32 *) &field);
 229#define DEBUGFS_DEVSTATS_ADD(name)                                      \
 230        debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops);
 231
 232DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
 233DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
 234DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
 235DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
 236
 237void debugfs_hw_add(struct ieee80211_local *local)
 238{
 239        struct dentry *phyd = local->hw.wiphy->debugfsdir;
 240        struct dentry *statsd;
 241
 242        if (!phyd)
 243                return;
 244
 245        local->debugfs.keys = debugfs_create_dir("keys", phyd);
 246
 247        DEBUGFS_ADD(total_ps_buffered);
 248        DEBUGFS_ADD(wep_iv);
 249        DEBUGFS_ADD(queues);
 250#ifdef CONFIG_PM
 251        DEBUGFS_ADD_MODE(reset, 0200);
 252#endif
 253        DEBUGFS_ADD(hwflags);
 254        DEBUGFS_ADD(user_power);
 255        DEBUGFS_ADD(power);
 256
 257        statsd = debugfs_create_dir("statistics", phyd);
 258
 259        /* if the dir failed, don't put all the other things into the root! */
 260        if (!statsd)
 261                return;
 262
 263        DEBUGFS_STATS_ADD(transmitted_fragment_count,
 264                local->dot11TransmittedFragmentCount);
 265        DEBUGFS_STATS_ADD(multicast_transmitted_frame_count,
 266                local->dot11MulticastTransmittedFrameCount);
 267        DEBUGFS_STATS_ADD(failed_count, local->dot11FailedCount);
 268        DEBUGFS_STATS_ADD(retry_count, local->dot11RetryCount);
 269        DEBUGFS_STATS_ADD(multiple_retry_count,
 270                local->dot11MultipleRetryCount);
 271        DEBUGFS_STATS_ADD(frame_duplicate_count,
 272                local->dot11FrameDuplicateCount);
 273        DEBUGFS_STATS_ADD(received_fragment_count,
 274                local->dot11ReceivedFragmentCount);
 275        DEBUGFS_STATS_ADD(multicast_received_frame_count,
 276                local->dot11MulticastReceivedFrameCount);
 277        DEBUGFS_STATS_ADD(transmitted_frame_count,
 278                local->dot11TransmittedFrameCount);
 279#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 280        DEBUGFS_STATS_ADD(tx_handlers_drop, local->tx_handlers_drop);
 281        DEBUGFS_STATS_ADD(tx_handlers_queued, local->tx_handlers_queued);
 282        DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted,
 283                local->tx_handlers_drop_unencrypted);
 284        DEBUGFS_STATS_ADD(tx_handlers_drop_fragment,
 285                local->tx_handlers_drop_fragment);
 286        DEBUGFS_STATS_ADD(tx_handlers_drop_wep,
 287                local->tx_handlers_drop_wep);
 288        DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc,
 289                local->tx_handlers_drop_not_assoc);
 290        DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port,
 291                local->tx_handlers_drop_unauth_port);
 292        DEBUGFS_STATS_ADD(rx_handlers_drop, local->rx_handlers_drop);
 293        DEBUGFS_STATS_ADD(rx_handlers_queued, local->rx_handlers_queued);
 294        DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc,
 295                local->rx_handlers_drop_nullfunc);
 296        DEBUGFS_STATS_ADD(rx_handlers_drop_defrag,
 297                local->rx_handlers_drop_defrag);
 298        DEBUGFS_STATS_ADD(rx_handlers_drop_short,
 299                local->rx_handlers_drop_short);
 300        DEBUGFS_STATS_ADD(tx_expand_skb_head,
 301                local->tx_expand_skb_head);
 302        DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned,
 303                local->tx_expand_skb_head_cloned);
 304        DEBUGFS_STATS_ADD(rx_expand_skb_head,
 305                local->rx_expand_skb_head);
 306        DEBUGFS_STATS_ADD(rx_expand_skb_head2,
 307                local->rx_expand_skb_head2);
 308        DEBUGFS_STATS_ADD(rx_handlers_fragments,
 309                local->rx_handlers_fragments);
 310        DEBUGFS_STATS_ADD(tx_status_drop,
 311                local->tx_status_drop);
 312#endif
 313        DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount);
 314        DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount);
 315        DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount);
 316        DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount);
 317}
 318
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