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 } 218