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_FILE(name, field, format)                                   \
  43                 STA_READ_##format(name, field)                          \
  44                 STA_OPS(name)
  45
  46 STA_FILE(aid, sta.aid, D);
  47 STA_FILE(dev, sdata->dev->name, S);
  48 STA_FILE(rx_packets, rx_packets, LU);
  49 STA_FILE(tx_packets, tx_packets, LU);
  50 STA_FILE(rx_bytes, rx_bytes, LU);
  51 STA_FILE(tx_bytes, tx_bytes, LU);
  52 STA_FILE(rx_duplicates, num_duplicates, LU);
  53 STA_FILE(rx_fragments, rx_fragments, LU);
  54 STA_FILE(rx_dropped, rx_dropped, LU);
  55 STA_FILE(tx_fragments, tx_fragments, LU);
  56 STA_FILE(tx_filtered, tx_filtered_count, LU);
  57 STA_FILE(tx_retry_failed, tx_retry_failed, LU);
  58 STA_FILE(tx_retry_count, tx_retry_count, LU);
  59 STA_FILE(last_signal, last_signal, D);
  60 STA_FILE(last_qual, last_qual, D);
  61 STA_FILE(last_noise, last_noise, D);
  62 STA_FILE(wep_weak_iv_count, wep_weak_iv_count, LU);
  63
  64 static ssize_t sta_flags_read(struct file *file, char __user *userbuf,
  65                               size_t count, loff_t *ppos)
  66 {
  67         char buf[100];
  68         struct sta_info *sta = file->private_data;
  69         u32 staflags = get_sta_flags(sta);
  70         int res = scnprintf(buf, sizeof(buf), "%s%s%s%s%s%s%s",
  71                 staflags & WLAN_STA_AUTH ? "AUTH\n" : "",
  72                 staflags & WLAN_STA_ASSOC ? "ASSOC\n" : "",
  73                 staflags & WLAN_STA_PS ? "PS\n" : "",
  74                 staflags & WLAN_STA_AUTHORIZED ? "AUTHORIZED\n" : "",
  75                 staflags & WLAN_STA_SHORT_PREAMBLE ? "SHORT PREAMBLE\n" : "",
  76                 staflags & WLAN_STA_WME ? "WME\n" : "",
  77                 staflags & WLAN_STA_WDS ? "WDS\n" : "");
  78         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
  79 }
  80 STA_OPS(flags);
  81
  82 static ssize_t sta_num_ps_buf_frames_read(struct file *file,
  83                                           char __user *userbuf,
  84                                           size_t count, loff_t *ppos)
  85 {
  86         char buf[20];
  87         struct sta_info *sta = file->private_data;
  88         int res = scnprintf(buf, sizeof(buf), "%u\n",
  89                             skb_queue_len(&sta->ps_tx_buf));
  90         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
  91 }
  92 STA_OPS(num_ps_buf_frames);
  93
  94 static ssize_t sta_inactive_ms_read(struct file *file, char __user *userbuf,
  95                                     size_t count, loff_t *ppos)
  96 {
  97         char buf[20];
  98         struct sta_info *sta = file->private_data;
  99         int res = scnprintf(buf, sizeof(buf), "%d\n",
 100                             jiffies_to_msecs(jiffies - sta->last_rx));
 101         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
 102 }
 103 STA_OPS(inactive_ms);
 104
 105 static ssize_t sta_last_seq_ctrl_read(struct file *file, char __user *userbuf,
 106                                       size_t count, loff_t *ppos)
 107 {
 108         char buf[15*NUM_RX_DATA_QUEUES], *p = buf;
 109         int i;
 110         struct sta_info *sta = file->private_data;
 111         for (i = 0; i < NUM_RX_DATA_QUEUES; i++)
 112                 p += scnprintf(p, sizeof(buf)+buf-p, "%x ",
 113                                le16_to_cpu(sta->last_seq_ctrl[i]));
 114         p += scnprintf(p, sizeof(buf)+buf-p, "\n");
 115         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
 116 }
 117 STA_OPS(last_seq_ctrl);
 118
 119 static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf,
 120                                         size_t count, loff_t *ppos)
 121 {
 122         char buf[768], *p = buf;
 123         int i;
 124         struct sta_info *sta = file->private_data;
 125         p += scnprintf(p, sizeof(buf)+buf-p, "Agg state for STA is:\n");
 126         p += scnprintf(p, sizeof(buf)+buf-p, " STA next dialog_token is %d \n "
 127                         "TIDs info is: \n TID :",
 128                         (sta->ampdu_mlme.dialog_token_allocator + 1));
 129         for (i = 0; i < STA_TID_NUM; i++)
 130                 p += scnprintf(p, sizeof(buf)+buf-p, "%5d", i);
 131
 132         p += scnprintf(p, sizeof(buf)+buf-p, "\n RX  :");
 133         for (i = 0; i < STA_TID_NUM; i++)
 134                 p += scnprintf(p, sizeof(buf)+buf-p, "%5d",
 135                         sta->ampdu_mlme.tid_state_rx[i]);
 136
 137         p += scnprintf(p, sizeof(buf)+buf-p, "\n DTKN:");
 138         for (i = 0; i < STA_TID_NUM; i++)
 139                 p += scnprintf(p, sizeof(buf)+buf-p, "%5d",
 140                         sta->ampdu_mlme.tid_state_rx[i] ?
 141                         sta->ampdu_mlme.tid_rx[i]->dialog_token : 0);
 142
 143         p += scnprintf(p, sizeof(buf)+buf-p, "\n TX  :");
 144         for (i = 0; i < STA_TID_NUM; i++)
 145                 p += scnprintf(p, sizeof(buf)+buf-p, "%5d",
 146                         sta->ampdu_mlme.tid_state_tx[i]);
 147
 148         p += scnprintf(p, sizeof(buf)+buf-p, "\n DTKN:");
 149         for (i = 0; i < STA_TID_NUM; i++)
 150                 p += scnprintf(p, sizeof(buf)+buf-p, "%5d",
 151                         sta->ampdu_mlme.tid_state_tx[i] ?
 152                         sta->ampdu_mlme.tid_tx[i]->dialog_token : 0);
 153
 154         p += scnprintf(p, sizeof(buf)+buf-p, "\n SSN :");
 155         for (i = 0; i < STA_TID_NUM; i++)
 156                 p += scnprintf(p, sizeof(buf)+buf-p, "%5d",
 157                         sta->ampdu_mlme.tid_state_tx[i] ?
 158                         sta->ampdu_mlme.tid_tx[i]->ssn : 0);
 159
 160         p += scnprintf(p, sizeof(buf)+buf-p, "\n");
 161
 162         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
 163 }
 164 STA_OPS(agg_status);
 165
 166 #define DEBUGFS_ADD(name) \
 167         sta->debugfs.name = debugfs_create_file(#name, 0400, \
 168                 sta->debugfs.dir, sta, &sta_ ##name## _ops);
 169
 170 #define DEBUGFS_DEL(name) \
 171         debugfs_remove(sta->debugfs.name);\
 172         sta->debugfs.name = NULL;
 173
 174
 175 void ieee80211_sta_debugfs_add(struct sta_info *sta)
 176 {
 177         struct dentry *stations_dir = sta->local->debugfs.stations;
 178         u8 mac[3*ETH_ALEN];
 179
 180         sta->debugfs.add_has_run = true;
 181
 182         if (!stations_dir)
 183                 return;
 184
 185         snprintf(mac, sizeof(mac), "%pM", sta->sta.addr);
 186
 187         /*
 188          * This might fail due to a race condition:
 189          * When mac80211 unlinks a station, the debugfs entries
 190          * remain, but it is already possible to link a new
 191          * station with the same address which triggers adding
 192          * it to debugfs; therefore, if the old station isn't
 193          * destroyed quickly enough the old station's debugfs
 194          * dir might still be around.
 195          */
 196         sta->debugfs.dir = debugfs_create_dir(mac, stations_dir);
 197         if (!sta->debugfs.dir)
 198                 return;
 199
 200         DEBUGFS_ADD(flags);
 201         DEBUGFS_ADD(num_ps_buf_frames);
 202         DEBUGFS_ADD(inactive_ms);
 203         DEBUGFS_ADD(last_seq_ctrl);
 204         DEBUGFS_ADD(agg_status);
 205 }
 206
 207 void ieee80211_sta_debugfs_remove(struct sta_info *sta)
 208 {
 209         DEBUGFS_DEL(flags);
 210         DEBUGFS_DEL(num_ps_buf_frames);
 211         DEBUGFS_DEL(inactive_ms);
 212         DEBUGFS_DEL(last_seq_ctrl);
 213         DEBUGFS_DEL(agg_status);
 214
 215         debugfs_remove(sta->debugfs.dir);
 216         sta->debugfs.dir = NULL;
 217 }