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 } 290