linux/net/mac80211/debugfs_sta.c
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   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)                    \
  21static 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)                                                   \
  37static 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
  46STA_FILE(aid, sta.aid, D);
  47STA_FILE(dev, sdata->dev->name, S);
  48STA_FILE(rx_packets, rx_packets, LU);
  49STA_FILE(tx_packets, tx_packets, LU);
  50STA_FILE(rx_bytes, rx_bytes, LU);
  51STA_FILE(tx_bytes, tx_bytes, LU);
  52STA_FILE(rx_duplicates, num_duplicates, LU);
  53STA_FILE(rx_fragments, rx_fragments, LU);
  54STA_FILE(rx_dropped, rx_dropped, LU);
  55STA_FILE(tx_fragments, tx_fragments, LU);
  56STA_FILE(tx_filtered, tx_filtered_count, LU);
  57STA_FILE(tx_retry_failed, tx_retry_failed, LU);
  58STA_FILE(tx_retry_count, tx_retry_count, LU);
  59STA_FILE(last_signal, last_signal, D);
  60STA_FILE(last_qual, last_qual, D);
  61STA_FILE(last_noise, last_noise, D);
  62STA_FILE(wep_weak_iv_count, wep_weak_iv_count, LU);
  63
  64static 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%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                staflags & WLAN_STA_MFP ? "MFP\n" : "");
  79        return simple_read_from_buffer(userbuf, count, ppos, buf, res);
  80}
  81STA_OPS(flags);
  82
  83static ssize_t sta_num_ps_buf_frames_read(struct file *file,
  84                                          char __user *userbuf,
  85                                          size_t count, loff_t *ppos)
  86{
  87        char buf[20];
  88        struct sta_info *sta = file->private_data;
  89        int res = scnprintf(buf, sizeof(buf), "%u\n",
  90                            skb_queue_len(&sta->ps_tx_buf));
  91        return simple_read_from_buffer(userbuf, count, ppos, buf, res);
  92}
  93STA_OPS(num_ps_buf_frames);
  94
  95static ssize_t sta_inactive_ms_read(struct file *file, char __user *userbuf,
  96                                    size_t count, loff_t *ppos)
  97{
  98        char buf[20];
  99        struct sta_info *sta = file->private_data;
 100        int res = scnprintf(buf, sizeof(buf), "%d\n",
 101                            jiffies_to_msecs(jiffies - sta->last_rx));
 102        return simple_read_from_buffer(userbuf, count, ppos, buf, res);
 103}
 104STA_OPS(inactive_ms);
 105
 106static ssize_t sta_last_seq_ctrl_read(struct file *file, char __user *userbuf,
 107                                      size_t count, loff_t *ppos)
 108{
 109        char buf[15*NUM_RX_DATA_QUEUES], *p = buf;
 110        int i;
 111        struct sta_info *sta = file->private_data;
 112        for (i = 0; i < NUM_RX_DATA_QUEUES; i++)
 113                p += scnprintf(p, sizeof(buf)+buf-p, "%x ",
 114                               le16_to_cpu(sta->last_seq_ctrl[i]));
 115        p += scnprintf(p, sizeof(buf)+buf-p, "\n");
 116        return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
 117}
 118STA_OPS(last_seq_ctrl);
 119
 120static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf,
 121                                        size_t count, loff_t *ppos)
 122{
 123        char buf[768], *p = buf;
 124        int i;
 125        struct sta_info *sta = file->private_data;
 126        p += scnprintf(p, sizeof(buf)+buf-p, "Agg state for STA is:\n");
 127        p += scnprintf(p, sizeof(buf)+buf-p, " STA next dialog_token is %d \n "
 128                        "TIDs info is: \n TID :",
 129                        (sta->ampdu_mlme.dialog_token_allocator + 1));
 130        for (i = 0; i < STA_TID_NUM; i++)
 131                p += scnprintf(p, sizeof(buf)+buf-p, "%5d", i);
 132
 133        p += scnprintf(p, sizeof(buf)+buf-p, "\n RX  :");
 134        for (i = 0; i < STA_TID_NUM; i++)
 135                p += scnprintf(p, sizeof(buf)+buf-p, "%5d",
 136                        sta->ampdu_mlme.tid_state_rx[i]);
 137
 138        p += scnprintf(p, sizeof(buf)+buf-p, "\n DTKN:");
 139        for (i = 0; i < STA_TID_NUM; i++)
 140                p += scnprintf(p, sizeof(buf)+buf-p, "%5d",
 141                        sta->ampdu_mlme.tid_state_rx[i] ?
 142                        sta->ampdu_mlme.tid_rx[i]->dialog_token : 0);
 143
 144        p += scnprintf(p, sizeof(buf)+buf-p, "\n TX  :");
 145        for (i = 0; i < STA_TID_NUM; i++)
 146                p += scnprintf(p, sizeof(buf)+buf-p, "%5d",
 147                        sta->ampdu_mlme.tid_state_tx[i]);
 148
 149        p += scnprintf(p, sizeof(buf)+buf-p, "\n DTKN:");
 150        for (i = 0; i < STA_TID_NUM; i++)
 151                p += scnprintf(p, sizeof(buf)+buf-p, "%5d",
 152                        sta->ampdu_mlme.tid_state_tx[i] ?
 153                        sta->ampdu_mlme.tid_tx[i]->dialog_token : 0);
 154
 155        p += scnprintf(p, sizeof(buf)+buf-p, "\n SSN :");
 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]->ssn : 0);
 160
 161        p += scnprintf(p, sizeof(buf)+buf-p, "\n");
 162
 163        return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
 164}
 165STA_OPS(agg_status);
 166
 167#define DEBUGFS_ADD(name) \
 168        sta->debugfs.name = debugfs_create_file(#name, 0400, \
 169                sta->debugfs.dir, sta, &sta_ ##name## _ops);
 170
 171#define DEBUGFS_DEL(name) \
 172        debugfs_remove(sta->debugfs.name);\
 173        sta->debugfs.name = NULL;
 174
 175
 176void ieee80211_sta_debugfs_add(struct sta_info *sta)
 177{
 178        struct dentry *stations_dir = sta->local->debugfs.stations;
 179        u8 mac[3*ETH_ALEN];
 180
 181        sta->debugfs.add_has_run = true;
 182
 183        if (!stations_dir)
 184                return;
 185
 186        snprintf(mac, sizeof(mac), "%pM", sta->sta.addr);
 187
 188        /*
 189         * This might fail due to a race condition:
 190         * When mac80211 unlinks a station, the debugfs entries
 191         * remain, but it is already possible to link a new
 192         * station with the same address which triggers adding
 193         * it to debugfs; therefore, if the old station isn't
 194         * destroyed quickly enough the old station's debugfs
 195         * dir might still be around.
 196         */
 197        sta->debugfs.dir = debugfs_create_dir(mac, stations_dir);
 198        if (!sta->debugfs.dir)
 199                return;
 200
 201        DEBUGFS_ADD(flags);
 202        DEBUGFS_ADD(num_ps_buf_frames);
 203        DEBUGFS_ADD(inactive_ms);
 204        DEBUGFS_ADD(last_seq_ctrl);
 205        DEBUGFS_ADD(agg_status);
 206}
 207
 208void ieee80211_sta_debugfs_remove(struct sta_info *sta)
 209{
 210        DEBUGFS_DEL(flags);
 211        DEBUGFS_DEL(num_ps_buf_frames);
 212        DEBUGFS_DEL(inactive_ms);
 213        DEBUGFS_DEL(last_seq_ctrl);
 214        DEBUGFS_DEL(agg_status);
 215
 216        debugfs_remove(sta->debugfs.dir);
 217        sta->debugfs.dir = NULL;
 218}
 219