SAFE public projects git trees. - safe/jmp/linux-2.6/blob - net/mac80211/debugfs_sta.c

   1 /*
   2  * Copyright 2003-2005  Devicescape Software, Inc.
   3  * Copyright (c) 2006   Jiri Benc <jbenc@suse.cz>
   4  * Copyright 2007       Johannes Berg <johannes@sipsolutions.net>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #include <linux/debugfs.h>
  12 #include <linux/ieee80211.h>
  13 #include "ieee80211_i.h"
  14 #include "debugfs.h"
  15 #include "debugfs_sta.h"
  16 #include "sta_info.h"
  17
  18 /* sta attributtes */
  19
  20 #define STA_READ(name, buflen, field, format_string)                    \
  21 static ssize_t sta_ ##name## _read(struct file *file,                   \
  22                                    char __user *userbuf,                \
  23                                    size_t count, loff_t *ppos)          \
  24 {                                                                       \
  25         int res;                                                        \
  26         struct sta_info *sta = file->private_data;                      \
  27         char buf[buflen];                                               \
  28         res = scnprintf(buf, buflen, format_string, sta->field);        \
  29         return simple_read_from_buffer(userbuf, count, ppos, buf, res); \
  30 }
  31 #define STA_READ_D(name, field) STA_READ(name, 20, field, "%d\n")
  32 #define STA_READ_U(name, field) STA_READ(name, 20, field, "%u\n")
  33 #define STA_READ_LU(name, field) STA_READ(name, 20, field, "%lu\n")
  34 #define STA_READ_S(name, field) STA_READ(name, 20, field, "%s\n")
  35
  36 #define STA_OPS(name)                                                   \
  37 static const struct file_operations sta_ ##name## _ops = {              \
  38         .read = sta_##name##_read,                                      \
  39         .open = mac80211_open_file_generic,                             \
  40 }
  41
  42 #define STA_OPS_WR(name)                                                \
  43 static const struct file_operations sta_ ##name## _ops = {              \
  44         .read = sta_##name##_read,                                      \
  45         .write = sta_##name##_write,                                    \
  46         .open = mac80211_open_file_generic,                             \
  47 }
  48
  49 #define STA_FILE(name, field, format)                                   \
  50                 STA_READ_##format(name, field)                          \
  51                 STA_OPS(name)
  52
  53 STA_FILE(aid, sta.aid, D);
  54 STA_FILE(dev, sdata->dev->name, S);
  55 STA_FILE(rx_packets, rx_packets, LU);
  56 STA_FILE(tx_packets, tx_packets, LU);
  57 STA_FILE(rx_bytes, rx_bytes, LU);
  58 STA_FILE(tx_bytes, tx_bytes, LU);
  59 STA_FILE(rx_duplicates, num_duplicates, LU);
  60 STA_FILE(rx_fragments, rx_fragments, LU);
  61 STA_FILE(rx_dropped, rx_dropped, LU);
  62 STA_FILE(tx_fragments, tx_fragments, LU);
  63 STA_FILE(tx_filtered, tx_filtered_count, LU);
  64 STA_FILE(tx_retry_failed, tx_retry_failed, LU);
  65 STA_FILE(tx_retry_count, tx_retry_count, LU);
  66 STA_FILE(last_signal, last_signal, D);
  67 STA_FILE(last_qual, last_qual, D);
  68 STA_FILE(last_noise, last_noise, D);
  69 STA_FILE(wep_weak_iv_count, wep_weak_iv_count, LU);
  70
  71 static ssize_t sta_flags_read(struct file *file, char __user *userbuf,
  72                               size_t count, loff_t *ppos)
  73 {
  74         char buf[100];
  75         struct sta_info *sta = file->private_data;
  76         u32 staflags = get_sta_flags(sta);
  77         int res = scnprintf(buf, sizeof(buf), "%s%s%s%s%s%s%s",
  78                 staflags & WLAN_STA_AUTH ? "AUTH\n" : "",
  79                 staflags & WLAN_STA_ASSOC ? "ASSOC\n" : "",
  80                 staflags & WLAN_STA_PS ? "PS\n" : "",
  81                 staflags & WLAN_STA_AUTHORIZED ? "AUTHORIZED\n" : "",
  82                 staflags & WLAN_STA_SHORT_PREAMBLE ? "SHORT PREAMBLE\n" : "",
  83                 staflags & WLAN_STA_WME ? "WME\n" : "",
  84                 staflags & WLAN_STA_WDS ? "WDS\n" : "");
  85         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
  86 }
  87 STA_OPS(flags);
  88
  89 static ssize_t sta_num_ps_buf_frames_read(struct file *file,
  90                                           char __user *userbuf,
  91                                           size_t count, loff_t *ppos)
  92 {
  93         char buf[20];
  94         struct sta_info *sta = file->private_data;
  95         int res = scnprintf(buf, sizeof(buf), "%u\n",
  96                             skb_queue_len(&sta->ps_tx_buf));
  97         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
  98 }
  99 STA_OPS(num_ps_buf_frames);
 100
 101 static ssize_t sta_inactive_ms_read(struct file *file, char __user *userbuf,
 102                                     size_t count, loff_t *ppos)
 103 {
 104         char buf[20];
 105         struct sta_info *sta = file->private_data;
 106         int res = scnprintf(buf, sizeof(buf), "%d\n",
 107                             jiffies_to_msecs(jiffies - sta->last_rx));
 108         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
 109 }
 110 STA_OPS(inactive_ms);
 111
 112 static ssize_t sta_last_seq_ctrl_read(struct file *file, char __user *userbuf,
 113                                       size_t count, loff_t *ppos)
 114 {
 115         char buf[15*NUM_RX_DATA_QUEUES], *p = buf;
 116         int i;
 117         struct sta_info *sta = file->private_data;
 118         for (i = 0; i < NUM_RX_DATA_QUEUES; i++)
 119                 p += scnprintf(p, sizeof(buf)+buf-p, "%x ",
 120                                le16_to_cpu(sta->last_seq_ctrl[i]));
 121         p += scnprintf(p, sizeof(buf)+buf-p, "\n");
 122         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
 123 }
 124 STA_OPS(last_seq_ctrl);
 125
 126 static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf,
 127                                         size_t count, loff_t *ppos)
 128 {
 129         char buf[768], *p = buf;
 130         int i;
 131         struct sta_info *sta = file->private_data;
 132         p += scnprintf(p, sizeof(buf)+buf-p, "Agg state for STA is:\n");
 133         p += scnprintf(p, sizeof(buf)+buf-p, " STA next dialog_token is %d \n "
 134                         "TIDs info is: \n TID :",
 135                         (sta->ampdu_mlme.dialog_token_allocator + 1));
 136         for (i = 0; i < STA_TID_NUM; i++)
 137                 p += scnprintf(p, sizeof(buf)+buf-p, "%5d", i);
 138
 139         p += scnprintf(p, sizeof(buf)+buf-p, "\n RX  :");
 140         for (i = 0; i < STA_TID_NUM; i++)
 141                 p += scnprintf(p, sizeof(buf)+buf-p, "%5d",
 142                         sta->ampdu_mlme.tid_state_rx[i]);
 143
 144         p += scnprintf(p, sizeof(buf)+buf-p, "\n DTKN:");
 145         for (i = 0; i < STA_TID_NUM; i++)
 146                 p += scnprintf(p, sizeof(buf)+buf-p, "%5d",
 147                         sta->ampdu_mlme.tid_state_rx[i]?
 148                         sta->ampdu_mlme.tid_rx[i]->dialog_token : 0);
 149
 150         p += scnprintf(p, sizeof(buf)+buf-p, "\n TX  :");
 151         for (i = 0; i < STA_TID_NUM; i++)
 152                 p += scnprintf(p, sizeof(buf)+buf-p, "%5d",
 153                         sta->ampdu_mlme.tid_state_tx[i]);
 154
 155         p += scnprintf(p, sizeof(buf)+buf-p, "\n DTKN:");
 156         for (i = 0; i < STA_TID_NUM; i++)
 157                 p += scnprintf(p, sizeof(buf)+buf-p, "%5d",
 158                         sta->ampdu_mlme.tid_state_tx[i]?
 159                         sta->ampdu_mlme.tid_tx[i]->dialog_token : 0);
 160
 161         p += scnprintf(p, sizeof(buf)+buf-p, "\n SSN :");
 162         for (i = 0; i < STA_TID_NUM; i++)
 163                 p += scnprintf(p, sizeof(buf)+buf-p, "%5d",
 164                         sta->ampdu_mlme.tid_state_tx[i]?
 165                         sta->ampdu_mlme.tid_tx[i]->ssn : 0);
 166
 167         p += scnprintf(p, sizeof(buf)+buf-p, "\n");
 168
 169         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
 170 }
 171
 172 static ssize_t sta_agg_status_write(struct file *file,
 173                 const char __user *user_buf, size_t count, loff_t *ppos)
 174 {
 175         struct sta_info *sta = file->private_data;
 176         struct ieee80211_local *local = sta->sdata->local;
 177         struct ieee80211_hw *hw = &local->hw;
 178         u8 *da = sta->sta.addr;
 179         static int tid_static_tx[16] = {0, 0, 0, 0, 0, 0, 0, 0,
 180                                         0, 0, 0, 0, 0, 0, 0, 0};
 181         static int tid_static_rx[16] = {1, 1, 1, 1, 1, 1, 1, 1,
 182                                         1, 1, 1, 1, 1, 1, 1, 1};
 183         char *endp;
 184         char buf[32];
 185         int buf_size, rs;
 186         unsigned int tid_num;
 187         char state[4];
 188
 189         memset(buf, 0x00, sizeof(buf));
 190         buf_size = min(count, (sizeof(buf)-1));
 191         if (copy_from_user(buf, user_buf, buf_size))
 192                 return -EFAULT;
 193
 194         tid_num = simple_strtoul(buf, &endp, 0);
 195         if (endp == buf)
 196                 return -EINVAL;
 197
 198         if ((tid_num >= 100) && (tid_num <= 115)) {
 199                 /* toggle Rx aggregation command */
 200                 tid_num = tid_num - 100;
 201                 if (tid_static_rx[tid_num] == 1) {
 202                         strcpy(state, "off ");
 203                         ieee80211_sta_stop_rx_ba_session(sta->sdata, da, tid_num, 0,
 204                                         WLAN_REASON_QSTA_REQUIRE_SETUP);
 205                         sta->ampdu_mlme.tid_state_rx[tid_num] |=
 206                                         HT_AGG_STATE_DEBUGFS_CTL;
 207                         tid_static_rx[tid_num] = 0;
 208                 } else {
 209                         strcpy(state, "on ");
 210                         sta->ampdu_mlme.tid_state_rx[tid_num] &=
 211                                         ~HT_AGG_STATE_DEBUGFS_CTL;
 212                         tid_static_rx[tid_num] = 1;
 213                 }
 214                 printk(KERN_DEBUG "debugfs - try switching tid %u %s\n",
 215                                 tid_num, state);
 216         } else if ((tid_num >= 0) && (tid_num <= 15)) {
 217                 /* toggle Tx aggregation command */
 218                 if (tid_static_tx[tid_num] == 0) {
 219                         strcpy(state, "on ");
 220                         rs =  ieee80211_start_tx_ba_session(hw, da, tid_num);
 221                         if (rs == 0)
 222                                 tid_static_tx[tid_num] = 1;
 223                 } else {
 224                         strcpy(state, "off");
 225                         rs =  ieee80211_stop_tx_ba_session(hw, da, tid_num, 1);
 226                         if (rs == 0)
 227                                 tid_static_tx[tid_num] = 0;
 228                 }
 229                 printk(KERN_DEBUG "debugfs - switching tid %u %s, return=%d\n",
 230                                 tid_num, state, rs);
 231         }
 232
 233         return count;
 234 }
 235 STA_OPS_WR(agg_status);
 236
 237 #define DEBUGFS_ADD(name) \
 238         sta->debugfs.name = debugfs_create_file(#name, 0400, \
 239                 sta->debugfs.dir, sta, &sta_ ##name## _ops);
 240
 241 #define DEBUGFS_DEL(name) \
 242         debugfs_remove(sta->debugfs.name);\
 243         sta->debugfs.name = NULL;
 244
 245
 246 void ieee80211_sta_debugfs_add(struct sta_info *sta)
 247 {
 248         struct dentry *stations_dir = sta->local->debugfs.stations;
 249         DECLARE_MAC_BUF(mbuf);
 250         u8 *mac;
 251
 252         sta->debugfs.add_has_run = true;
 253
 254         if (!stations_dir)
 255                 return;
 256
 257         mac = print_mac(mbuf, sta->sta.addr);
 258
 259         /*
 260          * This might fail due to a race condition:
 261          * When mac80211 unlinks a station, the debugfs entries
 262          * remain, but it is already possible to link a new
 263          * station with the same address which triggers adding
 264          * it to debugfs; therefore, if the old station isn't
 265          * destroyed quickly enough the old station's debugfs
 266          * dir might still be around.
 267          */
 268         sta->debugfs.dir = debugfs_create_dir(mac, stations_dir);
 269         if (!sta->debugfs.dir)
 270                 return;
 271
 272         DEBUGFS_ADD(flags);
 273         DEBUGFS_ADD(num_ps_buf_frames);
 274         DEBUGFS_ADD(inactive_ms);
 275         DEBUGFS_ADD(last_seq_ctrl);
 276         DEBUGFS_ADD(agg_status);
 277 }
 278
 279 void ieee80211_sta_debugfs_remove(struct sta_info *sta)
 280 {
 281         DEBUGFS_DEL(flags);
 282         DEBUGFS_DEL(num_ps_buf_frames);
 283         DEBUGFS_DEL(inactive_ms);
 284         DEBUGFS_DEL(last_seq_ctrl);
 285         DEBUGFS_DEL(agg_status);
 286
 287         debugfs_remove(sta->debugfs.dir);
 288         sta->debugfs.dir = NULL;
 289 }