kernel/net/mac80211/debugfs.c

   1
   2 /*
   3  * mac80211 debugfs for wireless PHYs
   4  *
   5  * Copyright 2007       Johannes Berg <johannes@sipsolutions.net>
   6  * Copyright 2013-2014  Intel Mobile Communications GmbH
   7  *
   8  * GPLv2
   9  *
  10  */
  11
  12 #include <linux/debugfs.h>
  13 #include <linux/rtnetlink.h>
  14 #include "ieee80211_i.h"
  15 #include "driver-ops.h"
  16 #include "rate.h"
  17 #include "debugfs.h"
  18
  19 #define DEBUGFS_FORMAT_BUFFER_SIZE 100
  20
  21 int mac80211_format_buffer(char __user *userbuf, size_t count,
  22                                   loff_t *ppos, char *fmt, ...)
  23 {
  24         va_list args;
  25         char buf[DEBUGFS_FORMAT_BUFFER_SIZE];
  26         int res;
  27
  28         va_start(args, fmt);
  29         res = vscnprintf(buf, sizeof(buf), fmt, args);
  30         va_end(args);
  31
  32         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
  33 }
  34
  35 #define DEBUGFS_READONLY_FILE_FN(name, fmt, value...)                   \
  36 static ssize_t name## _read(struct file *file, char __user *userbuf,    \
  37                             size_t count, loff_t *ppos)                 \
  38 {                                                                       \
  39         struct ieee80211_local *local = file->private_data;             \
  40                                                                         \
  41         return mac80211_format_buffer(userbuf, count, ppos,             \
  42                                       fmt "\n", ##value);               \
  43 }
  44
  45 #define DEBUGFS_READONLY_FILE_OPS(name)                 \
  46 static const struct file_operations name## _ops = {                     \
  47         .read = name## _read,                                           \
  48         .open = simple_open,                                            \
  49         .llseek = generic_file_llseek,                                  \
  50 };
  51
  52 #define DEBUGFS_READONLY_FILE(name, fmt, value...)              \
  53         DEBUGFS_READONLY_FILE_FN(name, fmt, value)              \
  54         DEBUGFS_READONLY_FILE_OPS(name)
  55
  56 #define DEBUGFS_ADD(name)                                               \
  57         debugfs_create_file(#name, 0400, phyd, local, &name## _ops);
  58
  59 #define DEBUGFS_ADD_MODE(name, mode)                                    \
  60         debugfs_create_file(#name, mode, phyd, local, &name## _ops);
  61
  62
  63 DEBUGFS_READONLY_FILE(user_power, "%d",
  64                       local->user_power_level);
  65 DEBUGFS_READONLY_FILE(power, "%d",
  66                       local->hw.conf.power_level);
  67 DEBUGFS_READONLY_FILE(total_ps_buffered, "%d",
  68                       local->total_ps_buffered);
  69 DEBUGFS_READONLY_FILE(wep_iv, "%#08x",
  70                       local->wep_iv & 0xffffff);
  71 DEBUGFS_READONLY_FILE(rate_ctrl_alg, "%s",
  72         local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver");
  73
  74 #ifdef CONFIG_PM
  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 #endif
  94
  95 static ssize_t hwflags_read(struct file *file, char __user *user_buf,
  96                             size_t count, loff_t *ppos)
  97 {
  98         struct ieee80211_local *local = file->private_data;
  99         int mxln = 500;
 100         ssize_t rv;
 101         char *buf = kzalloc(mxln, GFP_KERNEL);
 102         int sf = 0; /* how many written so far */
 103
 104         if (!buf)
 105                 return 0;
 106
 107         sf += scnprintf(buf, mxln - sf, "0x%x\n", local->hw.flags);
 108         if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)
 109                 sf += scnprintf(buf + sf, mxln - sf, "HAS_RATE_CONTROL\n");
 110         if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS)
 111                 sf += scnprintf(buf + sf, mxln - sf, "RX_INCLUDES_FCS\n");
 112         if (local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING)
 113                 sf += scnprintf(buf + sf, mxln - sf,
 114                                 "HOST_BCAST_PS_BUFFERING\n");
 115         if (local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)
 116                 sf += scnprintf(buf + sf, mxln - sf,
 117                                 "2GHZ_SHORT_SLOT_INCAPABLE\n");
 118         if (local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)
 119                 sf += scnprintf(buf + sf, mxln - sf,
 120                                 "2GHZ_SHORT_PREAMBLE_INCAPABLE\n");
 121         if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
 122                 sf += scnprintf(buf + sf, mxln - sf, "SIGNAL_UNSPEC\n");
 123         if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
 124                 sf += scnprintf(buf + sf, mxln - sf, "SIGNAL_DBM\n");
 125         if (local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC)
 126                 sf += scnprintf(buf + sf, mxln - sf,
 127                                 "NEED_DTIM_BEFORE_ASSOC\n");
 128         if (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)
 129                 sf += scnprintf(buf + sf, mxln - sf, "SPECTRUM_MGMT\n");
 130         if (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION)
 131                 sf += scnprintf(buf + sf, mxln - sf, "AMPDU_AGGREGATION\n");
 132         if (local->hw.flags & IEEE80211_HW_SUPPORTS_PS)
 133                 sf += scnprintf(buf + sf, mxln - sf, "SUPPORTS_PS\n");
 134         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
 135                 sf += scnprintf(buf + sf, mxln - sf, "PS_NULLFUNC_STACK\n");
 136         if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)
 137                 sf += scnprintf(buf + sf, mxln - sf, "SUPPORTS_DYNAMIC_PS\n");
 138         if (local->hw.flags & IEEE80211_HW_MFP_CAPABLE)
 139                 sf += scnprintf(buf + sf, mxln - sf, "MFP_CAPABLE\n");
 140         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
 141                 sf += scnprintf(buf + sf, mxln - sf,
 142                                 "REPORTS_TX_ACK_STATUS\n");
 143         if (local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
 144                 sf += scnprintf(buf + sf, mxln - sf, "CONNECTION_MONITOR\n");
 145         if (local->hw.flags & IEEE80211_HW_SUPPORTS_PER_STA_GTK)
 146                 sf += scnprintf(buf + sf, mxln - sf, "SUPPORTS_PER_STA_GTK\n");
 147         if (local->hw.flags & IEEE80211_HW_AP_LINK_PS)
 148                 sf += scnprintf(buf + sf, mxln - sf, "AP_LINK_PS\n");
 149         if (local->hw.flags & IEEE80211_HW_TX_AMPDU_SETUP_IN_HW)
 150                 sf += scnprintf(buf + sf, mxln - sf, "TX_AMPDU_SETUP_IN_HW\n");
 151
 152         rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
 153         kfree(buf);
 154         return rv;
 155 }
 156
 157 static ssize_t queues_read(struct file *file, char __user *user_buf,
 158                            size_t count, loff_t *ppos)
 159 {
 160         struct ieee80211_local *local = file->private_data;
 161         unsigned long flags;
 162         char buf[IEEE80211_MAX_QUEUES * 20];
 163         int q, res = 0;
 164
 165         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 166         for (q = 0; q < local->hw.queues; q++)
 167                 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,
 168                                 local->queue_stop_reasons[q],
 169                                 skb_queue_len(&local->pending[q]));
 170         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 171
 172         return simple_read_from_buffer(user_buf, count, ppos, buf, res);
 173 }
 174
 175 DEBUGFS_READONLY_FILE_OPS(hwflags);
 176 DEBUGFS_READONLY_FILE_OPS(queues);
 177
 178 /* statistics stuff */
 179
 180 static ssize_t format_devstat_counter(struct ieee80211_local *local,
 181         char __user *userbuf,
 182         size_t count, loff_t *ppos,
 183         int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
 184                           int buflen))
 185 {
 186         struct ieee80211_low_level_stats stats;
 187         char buf[20];
 188         int res;
 189
 190         rtnl_lock();
 191         res = drv_get_stats(local, &stats);
 192         rtnl_unlock();
 193         if (res)
 194                 return res;
 195         res = printvalue(&stats, buf, sizeof(buf));
 196         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
 197 }
 198
 199 #define DEBUGFS_DEVSTATS_FILE(name)                                     \
 200 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
 201                                  char *buf, int buflen)                 \
 202 {                                                                       \
 203         return scnprintf(buf, buflen, "%u\n", stats->name);             \
 204 }                                                                       \
 205 static ssize_t stats_ ##name## _read(struct file *file,                 \
 206                                      char __user *userbuf,              \
 207                                      size_t count, loff_t *ppos)        \
 208 {                                                                       \
 209         return format_devstat_counter(file->private_data,               \
 210                                       userbuf,                          \
 211                                       count,                            \
 212                                       ppos,                             \
 213                                       print_devstats_##name);           \
 214 }                                                                       \
 215                                                                         \
 216 static const struct file_operations stats_ ##name## _ops = {            \
 217         .read = stats_ ##name## _read,                                  \
 218         .open = simple_open,                                            \
 219         .llseek = generic_file_llseek,                                  \
 220 };
 221
 222 #define DEBUGFS_STATS_ADD(name, field)                                  \
 223         debugfs_create_u32(#name, 0400, statsd, (u32 *) &field);
 224 #define DEBUGFS_DEVSTATS_ADD(name)                                      \
 225         debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops);
 226
 227 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
 228 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
 229 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
 230 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
 231
 232 void debugfs_hw_add(struct ieee80211_local *local)
 233 {
 234         struct dentry *phyd = local->hw.wiphy->debugfsdir;
 235         struct dentry *statsd;
 236
 237         if (!phyd)
 238                 return;
 239
 240         local->debugfs.keys = debugfs_create_dir("keys", phyd);
 241
 242         DEBUGFS_ADD(total_ps_buffered);
 243         DEBUGFS_ADD(wep_iv);
 244         DEBUGFS_ADD(queues);
 245 #ifdef CONFIG_PM
 246         DEBUGFS_ADD_MODE(reset, 0200);
 247 #endif
 248         DEBUGFS_ADD(hwflags);
 249         DEBUGFS_ADD(user_power);
 250         DEBUGFS_ADD(power);
 251
 252         statsd = debugfs_create_dir("statistics", phyd);
 253
 254         /* if the dir failed, don't put all the other things into the root! */
 255         if (!statsd)
 256                 return;
 257
 258         DEBUGFS_STATS_ADD(transmitted_fragment_count,
 259                 local->dot11TransmittedFragmentCount);
 260         DEBUGFS_STATS_ADD(multicast_transmitted_frame_count,
 261                 local->dot11MulticastTransmittedFrameCount);
 262         DEBUGFS_STATS_ADD(failed_count, local->dot11FailedCount);
 263         DEBUGFS_STATS_ADD(retry_count, local->dot11RetryCount);
 264         DEBUGFS_STATS_ADD(multiple_retry_count,
 265                 local->dot11MultipleRetryCount);
 266         DEBUGFS_STATS_ADD(frame_duplicate_count,
 267                 local->dot11FrameDuplicateCount);
 268         DEBUGFS_STATS_ADD(received_fragment_count,
 269                 local->dot11ReceivedFragmentCount);
 270         DEBUGFS_STATS_ADD(multicast_received_frame_count,
 271                 local->dot11MulticastReceivedFrameCount);
 272         DEBUGFS_STATS_ADD(transmitted_frame_count,
 273                 local->dot11TransmittedFrameCount);
 274 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 275         DEBUGFS_STATS_ADD(tx_handlers_drop, local->tx_handlers_drop);
 276         DEBUGFS_STATS_ADD(tx_handlers_queued, local->tx_handlers_queued);
 277         DEBUGFS_STATS_ADD(tx_handlers_drop_fragment,
 278                 local->tx_handlers_drop_fragment);
 279         DEBUGFS_STATS_ADD(tx_handlers_drop_wep,
 280                 local->tx_handlers_drop_wep);
 281         DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc,
 282                 local->tx_handlers_drop_not_assoc);
 283         DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port,
 284                 local->tx_handlers_drop_unauth_port);
 285         DEBUGFS_STATS_ADD(rx_handlers_drop, local->rx_handlers_drop);
 286         DEBUGFS_STATS_ADD(rx_handlers_queued, local->rx_handlers_queued);
 287         DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc,
 288                 local->rx_handlers_drop_nullfunc);
 289         DEBUGFS_STATS_ADD(rx_handlers_drop_defrag,
 290                 local->rx_handlers_drop_defrag);
 291         DEBUGFS_STATS_ADD(rx_handlers_drop_short,
 292                 local->rx_handlers_drop_short);
 293         DEBUGFS_STATS_ADD(tx_expand_skb_head,
 294                 local->tx_expand_skb_head);
 295         DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned,
 296                 local->tx_expand_skb_head_cloned);
 297         DEBUGFS_STATS_ADD(rx_expand_skb_head,
 298                 local->rx_expand_skb_head);
 299         DEBUGFS_STATS_ADD(rx_expand_skb_head2,
 300                 local->rx_expand_skb_head2);
 301         DEBUGFS_STATS_ADD(rx_handlers_fragments,
 302                 local->rx_handlers_fragments);
 303         DEBUGFS_STATS_ADD(tx_status_drop,
 304                 local->tx_status_drop);
 305 #endif
 306         DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount);
 307         DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount);
 308         DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount);
 309         DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount);
 310 }