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(frequency, "%d",
  67                      local->hw.conf.channel->center_freq);
  68DEBUGFS_READONLY_FILE(total_ps_buffered, "%d",
  69                      local->total_ps_buffered);
  70DEBUGFS_READONLY_FILE(wep_iv, "%#08x",
  71                      local->wep_iv & 0xffffff);
  72DEBUGFS_READONLY_FILE(rate_ctrl_alg, "%s",
  73        local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver");
  74
  75static 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
  88static const struct file_operations reset_ops = {
  89        .write = reset_write,
  90        .open = simple_open,
  91        .llseek = noop_llseek,
  92};
  93
  94static 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
 121static 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
 189static 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
 207DEBUGFS_READONLY_FILE_OPS(hwflags);
 208DEBUGFS_READONLY_FILE_OPS(channel_type);
 209DEBUGFS_READONLY_FILE_OPS(queues);
 210
 211/* statistics stuff */
 212
 213static 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)                                     \
 233static 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}                                                                       \
 238static 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                                                                        \
 249static 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
 260DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
 261DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
 262DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
 263DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
 264
 265void 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}
 346
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