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, 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 struct sta_info *sta = file->private_data; \ 26 return mac80211_format_buffer(userbuf, count, ppos, \ 27 format_string, sta->field); \ 28 } 29 #define STA_READ_D(name, field) STA_READ(name, field, "%d\n") 30 #define STA_READ_U(name, field) STA_READ(name, field, "%u\n") 31 #define STA_READ_S(name, field) STA_READ(name, field, "%s\n") 32 33 #define STA_OPS(name) \ 34 static const struct file_operations sta_ ##name## _ops = { \ 35 .read = sta_##name##_read, \ 36 .open = mac80211_open_file_generic, \ 37 .llseek = generic_file_llseek, \ 38 } 39 40 #define STA_OPS_RW(name) \ 41 static const struct file_operations sta_ ##name## _ops = { \ 42 .read = sta_##name##_read, \ 43 .write = sta_##name##_write, \ 44 .open = mac80211_open_file_generic, \ 45 .llseek = generic_file_llseek, \ 46 } 47 48 #define STA_FILE(name, field, format) \ 49 STA_READ_##format(name, field) \ 50 STA_OPS(name) 51 52 STA_FILE(aid, sta.aid, D); 53 STA_FILE(dev, sdata->name, S); 54 STA_FILE(last_signal, last_signal, D); 55 56 static ssize_t sta_flags_read(struct file *file, char __user *userbuf, 57 size_t count, loff_t *ppos) 58 { 59 char buf[100]; 60 struct sta_info *sta = file->private_data; 61 u32 staflags = get_sta_flags(sta); 62 int res = scnprintf(buf, sizeof(buf), "%s%s%s%s%s%s%s%s%s", 63 staflags & WLAN_STA_AUTH ? "AUTH\n" : "", 64 staflags & WLAN_STA_ASSOC ? "ASSOC\n" : "", 65 staflags & WLAN_STA_PS_STA ? "PS (sta)\n" : "", 66 staflags & WLAN_STA_PS_DRIVER ? "PS (driver)\n" : "", 67 staflags & WLAN_STA_AUTHORIZED ? "AUTHORIZED\n" : "", 68 staflags & WLAN_STA_SHORT_PREAMBLE ? "SHORT PREAMBLE\n" : "", 69 staflags & WLAN_STA_WME ? "WME\n" : "", 70 staflags & WLAN_STA_WDS ? "WDS\n" : "", 71 staflags & WLAN_STA_MFP ? "MFP\n" : ""); 72 return simple_read_from_buffer(userbuf, count, ppos, buf, res); 73 } 74 STA_OPS(flags); 75 76 static ssize_t sta_num_ps_buf_frames_read(struct file *file, 77 char __user *userbuf, 78 size_t count, loff_t *ppos) 79 { 80 struct sta_info *sta = file->private_data; 81 return mac80211_format_buffer(userbuf, count, ppos, "%u\n", 82 skb_queue_len(&sta->ps_tx_buf)); 83 } 84 STA_OPS(num_ps_buf_frames); 85 86 static ssize_t sta_inactive_ms_read(struct file *file, char __user *userbuf, 87 size_t count, loff_t *ppos) 88 { 89 struct sta_info *sta = file->private_data; 90 return mac80211_format_buffer(userbuf, count, ppos, "%d\n", 91 jiffies_to_msecs(jiffies - sta->last_rx)); 92 } 93 STA_OPS(inactive_ms); 94 95 static ssize_t sta_last_seq_ctrl_read(struct file *file, char __user *userbuf, 96 size_t count, loff_t *ppos) 97 { 98 char buf[15*NUM_RX_DATA_QUEUES], *p = buf; 99 int i; 100 struct sta_info *sta = file->private_data; 101 for (i = 0; i < NUM_RX_DATA_QUEUES; i++) 102 p += scnprintf(p, sizeof(buf)+buf-p, "%x ", 103 le16_to_cpu(sta->last_seq_ctrl[i])); 104 p += scnprintf(p, sizeof(buf)+buf-p, "\n"); 105 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); 106 } 107 STA_OPS(last_seq_ctrl); 108 109 static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf, 110 size_t count, loff_t *ppos) 111 { 112 char buf[71 + STA_TID_NUM * 40], *p = buf; 113 int i; 114 struct sta_info *sta = file->private_data; 115 struct tid_ampdu_rx *tid_rx; 116 struct tid_ampdu_tx *tid_tx; 117 118 rcu_read_lock(); 119 120 p += scnprintf(p, sizeof(buf) + buf - p, "next dialog_token: %#02x\n", 121 sta->ampdu_mlme.dialog_token_allocator + 1); 122 p += scnprintf(p, sizeof(buf) + buf - p, 123 "TID\t\tRX active\tDTKN\tSSN\t\tTX\tDTKN\tpending\n"); 124 125 for (i = 0; i < STA_TID_NUM; i++) { 126 tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[i]); 127 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[i]); 128 129 p += scnprintf(p, sizeof(buf) + buf - p, "%02d", i); 130 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_rx); 131 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x", 132 tid_rx ? tid_rx->dialog_token : 0); 133 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x", 134 tid_rx ? tid_rx->ssn : 0); 135 136 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_tx); 137 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x", 138 tid_tx ? tid_tx->dialog_token : 0); 139 p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d", 140 tid_tx ? skb_queue_len(&tid_tx->pending) : 0); 141 p += scnprintf(p, sizeof(buf) + buf - p, "\n"); 142 } 143 rcu_read_unlock(); 144 145 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); 146 } 147 148 static ssize_t sta_agg_status_write(struct file *file, const char __user *userbuf, 149 size_t count, loff_t *ppos) 150 { 151 char _buf[12], *buf = _buf; 152 struct sta_info *sta = file->private_data; 153 bool start, tx; 154 unsigned long tid; 155 int ret; 156 157 if (count > sizeof(_buf)) 158 return -EINVAL; 159 160 if (copy_from_user(buf, userbuf, count)) 161 return -EFAULT; 162 163 buf[sizeof(_buf) - 1] = '\0'; 164 165 if (strncmp(buf, "tx ", 3) == 0) { 166 buf += 3; 167 tx = true; 168 } else if (strncmp(buf, "rx ", 3) == 0) { 169 buf += 3; 170 tx = false; 171 } else 172 return -EINVAL; 173 174 if (strncmp(buf, "start ", 6) == 0) { 175 buf += 6; 176 start = true; 177 if (!tx) 178 return -EINVAL; 179 } else if (strncmp(buf, "stop ", 5) == 0) { 180 buf += 5; 181 start = false; 182 } else 183 return -EINVAL; 184 185 tid = simple_strtoul(buf, NULL, 0); 186 187 if (tid >= STA_TID_NUM) 188 return -EINVAL; 189 190 if (tx) { 191 if (start) 192 ret = ieee80211_start_tx_ba_session(&sta->sta, tid, 5000); 193 else 194 ret = ieee80211_stop_tx_ba_session(&sta->sta, tid); 195 } else { 196 __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT, 197 3, true); 198 ret = 0; 199 } 200 201 return ret ?: count; 202 } 203 STA_OPS_RW(agg_status); 204 205 static ssize_t sta_ht_capa_read(struct file *file, char __user *userbuf, 206 size_t count, loff_t *ppos) 207 { 208 #define PRINT_HT_CAP(_cond, _str) \ 209 do { \ 210 if (_cond) \ 211 p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \ 212 } while (0) 213 char buf[512], *p = buf; 214 int i; 215 struct sta_info *sta = file->private_data; 216 struct ieee80211_sta_ht_cap *htc = &sta->sta.ht_cap; 217 218 p += scnprintf(p, sizeof(buf) + buf - p, "ht %ssupported\n", 219 htc->ht_supported ? "" : "not "); 220 if (htc->ht_supported) { 221 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.4x\n", htc->cap); 222 223 PRINT_HT_CAP((htc->cap & BIT(0)), "RX LDPC"); 224 PRINT_HT_CAP((htc->cap & BIT(1)), "HT20/HT40"); 225 PRINT_HT_CAP(!(htc->cap & BIT(1)), "HT20"); 226 227 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 0, "Static SM Power Save"); 228 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 1, "Dynamic SM Power Save"); 229 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 3, "SM Power Save disabled"); 230 231 PRINT_HT_CAP((htc->cap & BIT(4)), "RX Greenfield"); 232 PRINT_HT_CAP((htc->cap & BIT(5)), "RX HT20 SGI"); 233 PRINT_HT_CAP((htc->cap & BIT(6)), "RX HT40 SGI"); 234 PRINT_HT_CAP((htc->cap & BIT(7)), "TX STBC"); 235 236 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 0, "No RX STBC"); 237 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 1, "RX STBC 1-stream"); 238 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 2, "RX STBC 2-streams"); 239 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 3, "RX STBC 3-streams"); 240 241 PRINT_HT_CAP((htc->cap & BIT(10)), "HT Delayed Block Ack"); 242 243 PRINT_HT_CAP((htc->cap & BIT(11)), "Max AMSDU length: " 244 "3839 bytes"); 245 PRINT_HT_CAP(!(htc->cap & BIT(11)), "Max AMSDU length: " 246 "7935 bytes"); 247 248 /* 249 * For beacons and probe response this would mean the BSS 250 * does or does not allow the usage of DSSS/CCK HT40. 251 * Otherwise it means the STA does or does not use 252 * DSSS/CCK HT40. 253 */ 254 PRINT_HT_CAP((htc->cap & BIT(12)), "DSSS/CCK HT40"); 255 PRINT_HT_CAP(!(htc->cap & BIT(12)), "No DSSS/CCK HT40"); 256 257 /* BIT(13) is reserved */ 258 259 PRINT_HT_CAP((htc->cap & BIT(14)), "40 MHz Intolerant"); 260 261 PRINT_HT_CAP((htc->cap & BIT(15)), "L-SIG TXOP protection"); 262 263 p += scnprintf(p, sizeof(buf)+buf-p, "ampdu factor/density: %d/%d\n", 264 htc->ampdu_factor, htc->ampdu_density); 265 p += scnprintf(p, sizeof(buf)+buf-p, "MCS mask:"); 266 267 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) 268 p += scnprintf(p, sizeof(buf)+buf-p, " %.2x", 269 htc->mcs.rx_mask[i]); 270 p += scnprintf(p, sizeof(buf)+buf-p, "\n"); 271 272 /* If not set this is meaningless */ 273 if (le16_to_cpu(htc->mcs.rx_highest)) { 274 p += scnprintf(p, sizeof(buf)+buf-p, 275 "MCS rx highest: %d Mbps\n", 276 le16_to_cpu(htc->mcs.rx_highest)); 277 } 278 279 p += scnprintf(p, sizeof(buf)+buf-p, "MCS tx params: %x\n", 280 htc->mcs.tx_params); 281 } 282 283 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); 284 } 285 STA_OPS(ht_capa); 286 287 #define DEBUGFS_ADD(name) \ 288 debugfs_create_file(#name, 0400, \ 289 sta->debugfs.dir, sta, &sta_ ##name## _ops); 290 291 #define DEBUGFS_ADD_COUNTER(name, field) \ 292 if (sizeof(sta->field) == sizeof(u32)) \ 293 debugfs_create_u32(#name, 0400, sta->debugfs.dir, \ 294 (u32 *) &sta->field); \ 295 else \ 296 debugfs_create_u64(#name, 0400, sta->debugfs.dir, \ 297 (u64 *) &sta->field); 298 299 void ieee80211_sta_debugfs_add(struct sta_info *sta) 300 { 301 struct dentry *stations_dir = sta->sdata->debugfs.subdir_stations; 302 u8 mac[3*ETH_ALEN]; 303 304 sta->debugfs.add_has_run = true; 305 306 if (!stations_dir) 307 return; 308 309 snprintf(mac, sizeof(mac), "%pM", sta->sta.addr); 310 311 /* 312 * This might fail due to a race condition: 313 * When mac80211 unlinks a station, the debugfs entries 314 * remain, but it is already possible to link a new 315 * station with the same address which triggers adding 316 * it to debugfs; therefore, if the old station isn't 317 * destroyed quickly enough the old station's debugfs 318 * dir might still be around. 319 */ 320 sta->debugfs.dir = debugfs_create_dir(mac, stations_dir); 321 if (!sta->debugfs.dir) 322 return; 323 324 DEBUGFS_ADD(flags); 325 DEBUGFS_ADD(num_ps_buf_frames); 326 DEBUGFS_ADD(inactive_ms); 327 DEBUGFS_ADD(last_seq_ctrl); 328 DEBUGFS_ADD(agg_status); 329 DEBUGFS_ADD(dev); 330 DEBUGFS_ADD(last_signal); 331 DEBUGFS_ADD(ht_capa); 332 333 DEBUGFS_ADD_COUNTER(rx_packets, rx_packets); 334 DEBUGFS_ADD_COUNTER(tx_packets, tx_packets); 335 DEBUGFS_ADD_COUNTER(rx_bytes, rx_bytes); 336 DEBUGFS_ADD_COUNTER(tx_bytes, tx_bytes); 337 DEBUGFS_ADD_COUNTER(rx_duplicates, num_duplicates); 338 DEBUGFS_ADD_COUNTER(rx_fragments, rx_fragments); 339 DEBUGFS_ADD_COUNTER(rx_dropped, rx_dropped); 340 DEBUGFS_ADD_COUNTER(tx_fragments, tx_fragments); 341 DEBUGFS_ADD_COUNTER(tx_filtered, tx_filtered_count); 342 DEBUGFS_ADD_COUNTER(tx_retry_failed, tx_retry_failed); 343 DEBUGFS_ADD_COUNTER(tx_retry_count, tx_retry_count); 344 DEBUGFS_ADD_COUNTER(wep_weak_iv_count, wep_weak_iv_count); 345 } 346 347 void ieee80211_sta_debugfs_remove(struct sta_info *sta) 348 { 349 debugfs_remove_recursive(sta->debugfs.dir); 350 sta->debugfs.dir = NULL; 351 } 352