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%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 } 81 STA_OPS(flags); 82 83 static 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 } 93 STA_OPS(num_ps_buf_frames); 94 95 static 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 } 104 STA_OPS(inactive_ms); 105 106 static 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 } 118 STA_OPS(last_seq_ctrl); 119 120 static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf, 121 size_t count, loff_t *ppos) 122 { 123 char buf[30 + STA_TID_NUM * 70], *p = buf; 124 int i; 125 struct sta_info *sta = file->private_data; 126 127 spin_lock_bh(&sta->lock); 128 p += scnprintf(p, sizeof(buf)+buf-p, "next dialog_token is %#02x\n", 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, "TID %02d:", i); 132 p += scnprintf(p, sizeof(buf)+buf-p, " RX=%x", 133 sta->ampdu_mlme.tid_state_rx[i]); 134 p += scnprintf(p, sizeof(buf)+buf-p, "/DTKN=%#.2x", 135 sta->ampdu_mlme.tid_state_rx[i] ? 136 sta->ampdu_mlme.tid_rx[i]->dialog_token : 0); 137 p += scnprintf(p, sizeof(buf)+buf-p, "/SSN=%#.3x", 138 sta->ampdu_mlme.tid_state_rx[i] ? 139 sta->ampdu_mlme.tid_rx[i]->ssn : 0); 140 141 p += scnprintf(p, sizeof(buf)+buf-p, " TX=%x", 142 sta->ampdu_mlme.tid_state_tx[i]); 143 p += scnprintf(p, sizeof(buf)+buf-p, "/DTKN=%#.2x", 144 sta->ampdu_mlme.tid_state_tx[i] ? 145 sta->ampdu_mlme.tid_tx[i]->dialog_token : 0); 146 p += scnprintf(p, sizeof(buf)+buf-p, "/SSN=%#.3x", 147 sta->ampdu_mlme.tid_state_tx[i] ? 148 sta->ampdu_mlme.tid_tx[i]->ssn : 0); 149 p += scnprintf(p, sizeof(buf)+buf-p, "/pending=%03d", 150 sta->ampdu_mlme.tid_state_tx[i] ? 151 skb_queue_len(&sta->ampdu_mlme.tid_tx[i]->pending) : 0); 152 p += scnprintf(p, sizeof(buf)+buf-p, "\n"); 153 } 154 spin_unlock_bh(&sta->lock); 155 156 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); 157 } 158 STA_OPS(agg_status); 159 160 #define DEBUGFS_ADD(name) \ 161 sta->debugfs.name = debugfs_create_file(#name, 0400, \ 162 sta->debugfs.dir, sta, &sta_ ##name## _ops); 163 164 #define DEBUGFS_DEL(name) \ 165 debugfs_remove(sta->debugfs.name);\ 166 sta->debugfs.name = NULL; 167 168 169 void ieee80211_sta_debugfs_add(struct sta_info *sta) 170 { 171 struct dentry *stations_dir = sta->local->debugfs.stations; 172 u8 mac[3*ETH_ALEN]; 173 174 sta->debugfs.add_has_run = true; 175 176 if (!stations_dir) 177 return; 178 179 snprintf(mac, sizeof(mac), "%pM", sta->sta.addr); 180 181 /* 182 * This might fail due to a race condition: 183 * When mac80211 unlinks a station, the debugfs entries 184 * remain, but it is already possible to link a new 185 * station with the same address which triggers adding 186 * it to debugfs; therefore, if the old station isn't 187 * destroyed quickly enough the old station's debugfs 188 * dir might still be around. 189 */ 190 sta->debugfs.dir = debugfs_create_dir(mac, stations_dir); 191 if (!sta->debugfs.dir) 192 return; 193 194 DEBUGFS_ADD(flags); 195 DEBUGFS_ADD(num_ps_buf_frames); 196 DEBUGFS_ADD(inactive_ms); 197 DEBUGFS_ADD(last_seq_ctrl); 198 DEBUGFS_ADD(agg_status); 199 DEBUGFS_ADD(dev); 200 DEBUGFS_ADD(rx_packets); 201 DEBUGFS_ADD(tx_packets); 202 DEBUGFS_ADD(rx_bytes); 203 DEBUGFS_ADD(tx_bytes); 204 DEBUGFS_ADD(rx_duplicates); 205 DEBUGFS_ADD(rx_fragments); 206 DEBUGFS_ADD(rx_dropped); 207 DEBUGFS_ADD(tx_fragments); 208 DEBUGFS_ADD(tx_filtered); 209 DEBUGFS_ADD(tx_retry_failed); 210 DEBUGFS_ADD(tx_retry_count); 211 DEBUGFS_ADD(last_signal); 212 DEBUGFS_ADD(last_qual); 213 DEBUGFS_ADD(last_noise); 214 DEBUGFS_ADD(wep_weak_iv_count); 215 } 216 217 void ieee80211_sta_debugfs_remove(struct sta_info *sta) 218 { 219 DEBUGFS_DEL(flags); 220 DEBUGFS_DEL(num_ps_buf_frames); 221 DEBUGFS_DEL(inactive_ms); 222 DEBUGFS_DEL(last_seq_ctrl); 223 DEBUGFS_DEL(agg_status); 224 DEBUGFS_DEL(aid); 225 DEBUGFS_DEL(dev); 226 DEBUGFS_DEL(rx_packets); 227 DEBUGFS_DEL(tx_packets); 228 DEBUGFS_DEL(rx_bytes); 229 DEBUGFS_DEL(tx_bytes); 230 DEBUGFS_DEL(rx_duplicates); 231 DEBUGFS_DEL(rx_fragments); 232 DEBUGFS_DEL(rx_dropped); 233 DEBUGFS_DEL(tx_fragments); 234 DEBUGFS_DEL(tx_filtered); 235 DEBUGFS_DEL(tx_retry_failed); 236 DEBUGFS_DEL(tx_retry_count); 237 DEBUGFS_DEL(last_signal); 238 DEBUGFS_DEL(last_qual); 239 DEBUGFS_DEL(last_noise); 240 DEBUGFS_DEL(wep_weak_iv_count); 241 242 debugfs_remove(sta->debugfs.dir); 243 sta->debugfs.dir = NULL; 244 } 245