net/mac80211/debugfs.c

   1 /*
   2  * mac80211 debugfs for wireless PHYs
   3  *
   4  * Copyright 2007       Johannes Berg <johannes@sipsolutions.net>
   5  * Copyright 2013-2014  Intel Mobile Communications GmbH
   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_SIGNAL_UNSPEC)
 115                 sf += scnprintf(buf + sf, mxln - sf, "SIGNAL_UNSPEC\n");
 116         if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
 117                 sf += scnprintf(buf + sf, mxln - sf, "SIGNAL_DBM\n");
 118         if (local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC)
 119                 sf += scnprintf(buf + sf, mxln - sf,
 120                                 "NEED_DTIM_BEFORE_ASSOC\n");
 121         if (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)
 122                 sf += scnprintf(buf + sf, mxln - sf, "SPECTRUM_MGMT\n");
 123         if (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION)
 124                 sf += scnprintf(buf + sf, mxln - sf, "AMPDU_AGGREGATION\n");
 125         if (local->hw.flags & IEEE80211_HW_SUPPORTS_PS)
 126                 sf += scnprintf(buf + sf, mxln - sf, "SUPPORTS_PS\n");
 127         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
 128                 sf += scnprintf(buf + sf, mxln - sf, "PS_NULLFUNC_STACK\n");
 129         if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)
 130                 sf += scnprintf(buf + sf, mxln - sf, "SUPPORTS_DYNAMIC_PS\n");
 131         if (local->hw.flags & IEEE80211_HW_MFP_CAPABLE)
 132                 sf += scnprintf(buf + sf, mxln - sf, "MFP_CAPABLE\n");
 133         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
 134                 sf += scnprintf(buf + sf, mxln - sf,
 135                                 "REPORTS_TX_ACK_STATUS\n");
 136         if (local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
 137                 sf += scnprintf(buf + sf, mxln - sf, "CONNECTION_MONITOR\n");
 138         if (local->hw.flags & IEEE80211_HW_SUPPORTS_PER_STA_GTK)
 139                 sf += scnprintf(buf + sf, mxln - sf, "SUPPORTS_PER_STA_GTK\n");
 140         if (local->hw.flags & IEEE80211_HW_AP_LINK_PS)
 141                 sf += scnprintf(buf + sf, mxln - sf, "AP_LINK_PS\n");
 142         if (local->hw.flags & IEEE80211_HW_TX_AMPDU_SETUP_IN_HW)
 143                 sf += scnprintf(buf + sf, mxln - sf, "TX_AMPDU_SETUP_IN_HW\n");
 144
 145         rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
 146         kfree(buf);
 147         return rv;
 148 }
 149
 150 static ssize_t queues_read(struct file *file, char __user *user_buf,
 151                            size_t count, loff_t *ppos)
 152 {
 153         struct ieee80211_local *local = file->private_data;
 154         unsigned long flags;
 155         char buf[IEEE80211_MAX_QUEUES * 20];
 156         int q, res = 0;
 157
 158         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 159         for (q = 0; q < local->hw.queues; q++)
 160                 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,
 161                                 local->queue_stop_reasons[q],
 162                                 skb_queue_len(&local->pending[q]));
 163         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 164
 165         return simple_read_from_buffer(user_buf, count, ppos, buf, res);
 166 }
 167
 168 DEBUGFS_READONLY_FILE_OPS(hwflags);
 169 DEBUGFS_READONLY_FILE_OPS(queues);
 170
 171 /* statistics stuff */
 172
 173 static ssize_t format_devstat_counter(struct ieee80211_local *local,
 174         char __user *userbuf,
 175         size_t count, loff_t *ppos,
 176         int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
 177                           int buflen))
 178 {
 179         struct ieee80211_low_level_stats stats;
 180         char buf[20];
 181         int res;
 182
 183         rtnl_lock();
 184         res = drv_get_stats(local, &stats);
 185         rtnl_unlock();
 186         if (res)
 187                 return res;
 188         res = printvalue(&stats, buf, sizeof(buf));
 189         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
 190 }
 191
 192 #define DEBUGFS_DEVSTATS_FILE(name)                                     \
 193 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
 194                                  char *buf, int buflen)                 \
 195 {                                                                       \
 196         return scnprintf(buf, buflen, "%u\n", stats->name);             \
 197 }                                                                       \
 198 static ssize_t stats_ ##name## _read(struct file *file,                 \
 199                                      char __user *userbuf,              \
 200                                      size_t count, loff_t *ppos)        \
 201 {                                                                       \
 202         return format_devstat_counter(file->private_data,               \
 203                                       userbuf,                          \
 204                                       count,                            \
 205                                       ppos,                             \
 206                                       print_devstats_##name);           \
 207 }                                                                       \
 208                                                                         \
 209 static const struct file_operations stats_ ##name## _ops = {            \
 210         .read = stats_ ##name## _read,                                  \
 211         .open = simple_open,                                            \
 212         .llseek = generic_file_llseek,                                  \
 213 };
 214
 215 #define DEBUGFS_STATS_ADD(name)                                 \
 216         debugfs_create_u32(#name, 0400, statsd, &local->name);
 217 #define DEBUGFS_DEVSTATS_ADD(name)                                      \
 218         debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops);
 219
 220 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
 221 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
 222 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
 223 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
 224
 225 void debugfs_hw_add(struct ieee80211_local *local)
 226 {
 227         struct dentry *phyd = local->hw.wiphy->debugfsdir;
 228         struct dentry *statsd;
 229
 230         if (!phyd)
 231                 return;
 232
 233         local->debugfs.keys = debugfs_create_dir("keys", phyd);
 234
 235         DEBUGFS_ADD(total_ps_buffered);
 236         DEBUGFS_ADD(wep_iv);
 237         DEBUGFS_ADD(queues);
 238 #ifdef CONFIG_PM
 239         DEBUGFS_ADD_MODE(reset, 0200);
 240 #endif
 241         DEBUGFS_ADD(hwflags);
 242         DEBUGFS_ADD(user_power);
 243         DEBUGFS_ADD(power);
 244
 245         statsd = debugfs_create_dir("statistics", phyd);
 246
 247         /* if the dir failed, don't put all the other things into the root! */
 248         if (!statsd)
 249                 return;
 250
 251 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 252         DEBUGFS_STATS_ADD(dot11TransmittedFragmentCount);
 253         DEBUGFS_STATS_ADD(dot11MulticastTransmittedFrameCount);
 254         DEBUGFS_STATS_ADD(dot11FailedCount);
 255         DEBUGFS_STATS_ADD(dot11RetryCount);
 256         DEBUGFS_STATS_ADD(dot11MultipleRetryCount);
 257         DEBUGFS_STATS_ADD(dot11FrameDuplicateCount);
 258         DEBUGFS_STATS_ADD(dot11ReceivedFragmentCount);
 259         DEBUGFS_STATS_ADD(dot11MulticastReceivedFrameCount);
 260         DEBUGFS_STATS_ADD(dot11TransmittedFrameCount);
 261         DEBUGFS_STATS_ADD(tx_handlers_drop);
 262         DEBUGFS_STATS_ADD(tx_handlers_queued);
 263         DEBUGFS_STATS_ADD(tx_handlers_drop_wep);
 264         DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc);
 265         DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port);
 266         DEBUGFS_STATS_ADD(rx_handlers_drop);
 267         DEBUGFS_STATS_ADD(rx_handlers_queued);
 268         DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc);
 269         DEBUGFS_STATS_ADD(rx_handlers_drop_defrag);
 270         DEBUGFS_STATS_ADD(rx_handlers_drop_short);
 271         DEBUGFS_STATS_ADD(tx_expand_skb_head);
 272         DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned);
 273         DEBUGFS_STATS_ADD(rx_expand_skb_head_defrag);
 274         DEBUGFS_STATS_ADD(rx_handlers_fragments);
 275         DEBUGFS_STATS_ADD(tx_status_drop);
 276 #endif
 277         DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount);
 278         DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount);
 279         DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount);
 280         DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount);
 281 }