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 96 static ssize_t sta_connected_time_read(struct file *file, char __user *userbuf, 97 size_t count, loff_t *ppos) 98 { 99 struct sta_info *sta = file->private_data; 100 struct timespec uptime; 101 struct tm result; 102 long connected_time_secs; 103 char buf[100]; 104 int res; 105 do_posix_clock_monotonic_gettime(&uptime); 106 connected_time_secs = uptime.tv_sec - sta->last_connected; 107 time_to_tm(connected_time_secs, 0, &result); 108 result.tm_year -= 70; 109 result.tm_mday -= 1; 110 res = scnprintf(buf, sizeof(buf), 111 "years - %ld\nmonths - %d\ndays - %d\nclock - %d:%d:%d\n\n", 112 result.tm_year, result.tm_mon, result.tm_mday, 113 result.tm_hour, result.tm_min, result.tm_sec); 114 return simple_read_from_buffer(userbuf, count, ppos, buf, res); 115 } 116 STA_OPS(connected_time); 117 118 119 120 static ssize_t sta_last_seq_ctrl_read(struct file *file, char __user *userbuf, 121 size_t count, loff_t *ppos) 122 { 123 char buf[15*NUM_RX_DATA_QUEUES], *p = buf; 124 int i; 125 struct sta_info *sta = file->private_data; 126 for (i = 0; i < NUM_RX_DATA_QUEUES; i++) 127 p += scnprintf(p, sizeof(buf)+buf-p, "%x ", 128 le16_to_cpu(sta->last_seq_ctrl[i])); 129 p += scnprintf(p, sizeof(buf)+buf-p, "\n"); 130 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); 131 } 132 STA_OPS(last_seq_ctrl); 133 134 static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf, 135 size_t count, loff_t *ppos) 136 { 137 char buf[71 + STA_TID_NUM * 40], *p = buf; 138 int i; 139 struct sta_info *sta = file->private_data; 140 struct tid_ampdu_rx *tid_rx; 141 struct tid_ampdu_tx *tid_tx; 142 143 rcu_read_lock(); 144 145 p += scnprintf(p, sizeof(buf) + buf - p, "next dialog_token: %#02x\n", 146 sta->ampdu_mlme.dialog_token_allocator + 1); 147 p += scnprintf(p, sizeof(buf) + buf - p, 148 "TID\t\tRX active\tDTKN\tSSN\t\tTX\tDTKN\tpending\n"); 149 150 for (i = 0; i < STA_TID_NUM; i++) { 151 tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[i]); 152 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[i]); 153 154 p += scnprintf(p, sizeof(buf) + buf - p, "%02d", i); 155 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_rx); 156 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x", 157 tid_rx ? tid_rx->dialog_token : 0); 158 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x", 159 tid_rx ? tid_rx->ssn : 0); 160 161 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_tx); 162 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x", 163 tid_tx ? tid_tx->dialog_token : 0); 164 p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d", 165 tid_tx ? skb_queue_len(&tid_tx->pending) : 0); 166 p += scnprintf(p, sizeof(buf) + buf - p, "\n"); 167 } 168 rcu_read_unlock(); 169 170 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); 171 } 172 173 static ssize_t sta_agg_status_write(struct file *file, const char __user *userbuf, 174 size_t count, loff_t *ppos) 175 { 176 char _buf[12], *buf = _buf; 177 struct sta_info *sta = file->private_data; 178 bool start, tx; 179 unsigned long tid; 180 int ret; 181 182 if (count > sizeof(_buf)) 183 return -EINVAL; 184 185 if (copy_from_user(buf, userbuf, count)) 186 return -EFAULT; 187 188 buf[sizeof(_buf) - 1] = '\0'; 189 190 if (strncmp(buf, "tx ", 3) == 0) { 191 buf += 3; 192 tx = true; 193 } else if (strncmp(buf, "rx ", 3) == 0) { 194 buf += 3; 195 tx = false; 196 } else 197 return -EINVAL; 198 199 if (strncmp(buf, "start ", 6) == 0) { 200 buf += 6; 201 start = true; 202 if (!tx) 203 return -EINVAL; 204 } else if (strncmp(buf, "stop ", 5) == 0) { 205 buf += 5; 206 start = false; 207 } else 208 return -EINVAL; 209 210 tid = simple_strtoul(buf, NULL, 0); 211 212 if (tid >= STA_TID_NUM) 213 return -EINVAL; 214 215 if (tx) { 216 if (start) 217 ret = ieee80211_start_tx_ba_session(&sta->sta, tid, 5000); 218 else 219 ret = ieee80211_stop_tx_ba_session(&sta->sta, tid); 220 } else { 221 __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT, 222 3, true); 223 ret = 0; 224 } 225 226 return ret ?: count; 227 } 228 STA_OPS_RW(agg_status); 229 230 static ssize_t sta_ht_capa_read(struct file *file, char __user *userbuf, 231 size_t count, loff_t *ppos) 232 { 233 #define PRINT_HT_CAP(_cond, _str) \ 234 do { \ 235 if (_cond) \ 236 p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \ 237 } while (0) 238 char buf[512], *p = buf; 239 int i; 240 struct sta_info *sta = file->private_data; 241 struct ieee80211_sta_ht_cap *htc = &sta->sta.ht_cap; 242 243 p += scnprintf(p, sizeof(buf) + buf - p, "ht %ssupported\n", 244 htc->ht_supported ? "" : "not "); 245 if (htc->ht_supported) { 246 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.4x\n", htc->cap); 247 248 PRINT_HT_CAP((htc->cap & BIT(0)), "RX LDPC"); 249 PRINT_HT_CAP((htc->cap & BIT(1)), "HT20/HT40"); 250 PRINT_HT_CAP(!(htc->cap & BIT(1)), "HT20"); 251 252 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 0, "Static SM Power Save"); 253 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 1, "Dynamic SM Power Save"); 254 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 3, "SM Power Save disabled"); 255 256 PRINT_HT_CAP((htc->cap & BIT(4)), "RX Greenfield"); 257 PRINT_HT_CAP((htc->cap & BIT(5)), "RX HT20 SGI"); 258 PRINT_HT_CAP((htc->cap & BIT(6)), "RX HT40 SGI"); 259 PRINT_HT_CAP((htc->cap & BIT(7)), "TX STBC"); 260 261 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 0, "No RX STBC"); 262 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 1, "RX STBC 1-stream"); 263 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 2, "RX STBC 2-streams"); 264 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 3, "RX STBC 3-streams"); 265 266 PRINT_HT_CAP((htc->cap & BIT(10)), "HT Delayed Block Ack"); 267 268 PRINT_HT_CAP((htc->cap & BIT(11)), "Max AMSDU length: " 269 "3839 bytes"); 270 PRINT_HT_CAP(!(htc->cap & BIT(11)), "Max AMSDU length: " 271 "7935 bytes"); 272 273 /* 274 * For beacons and probe response this would mean the BSS 275 * does or does not allow the usage of DSSS/CCK HT40. 276 * Otherwise it means the STA does or does not use 277 * DSSS/CCK HT40. 278 */ 279 PRINT_HT_CAP((htc->cap & BIT(12)), "DSSS/CCK HT40"); 280 PRINT_HT_CAP(!(htc->cap & BIT(12)), "No DSSS/CCK HT40"); 281 282 /* BIT(13) is reserved */ 283 284 PRINT_HT_CAP((htc->cap & BIT(14)), "40 MHz Intolerant"); 285 286 PRINT_HT_CAP((htc->cap & BIT(15)), "L-SIG TXOP protection"); 287 288 p += scnprintf(p, sizeof(buf)+buf-p, "ampdu factor/density: %d/%d\n", 289 htc->ampdu_factor, htc->ampdu_density); 290 p += scnprintf(p, sizeof(buf)+buf-p, "MCS mask:"); 291 292 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) 293 p += scnprintf(p, sizeof(buf)+buf-p, " %.2x", 294 htc->mcs.rx_mask[i]); 295 p += scnprintf(p, sizeof(buf)+buf-p, "\n"); 296 297 /* If not set this is meaningless */ 298 if (le16_to_cpu(htc->mcs.rx_highest)) { 299 p += scnprintf(p, sizeof(buf)+buf-p, 300 "MCS rx highest: %d Mbps\n", 301 le16_to_cpu(htc->mcs.rx_highest)); 302 } 303 304 p += scnprintf(p, sizeof(buf)+buf-p, "MCS tx params: %x\n", 305 htc->mcs.tx_params); 306 } 307 308 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); 309 } 310 STA_OPS(ht_capa); 311 312 #define DEBUGFS_ADD(name) \ 313 debugfs_create_file(#name, 0400, \ 314 sta->debugfs.dir, sta, &sta_ ##name## _ops); 315 316 #define DEBUGFS_ADD_COUNTER(name, field) \ 317 if (sizeof(sta->field) == sizeof(u32)) \ 318 debugfs_create_u32(#name, 0400, sta->debugfs.dir, \ 319 (u32 *) &sta->field); \ 320 else \ 321 debugfs_create_u64(#name, 0400, sta->debugfs.dir, \ 322 (u64 *) &sta->field); 323 324 void ieee80211_sta_debugfs_add(struct sta_info *sta) 325 { 326 struct dentry *stations_dir = sta->sdata->debugfs.subdir_stations; 327 u8 mac[3*ETH_ALEN]; 328 329 sta->debugfs.add_has_run = true; 330 331 if (!stations_dir) 332 return; 333 334 snprintf(mac, sizeof(mac), "%pM", sta->sta.addr); 335 336 /* 337 * This might fail due to a race condition: 338 * When mac80211 unlinks a station, the debugfs entries 339 * remain, but it is already possible to link a new 340 * station with the same address which triggers adding 341 * it to debugfs; therefore, if the old station isn't 342 * destroyed quickly enough the old station's debugfs 343 * dir might still be around. 344 */ 345 sta->debugfs.dir = debugfs_create_dir(mac, stations_dir); 346 if (!sta->debugfs.dir) 347 return; 348 349 DEBUGFS_ADD(flags); 350 DEBUGFS_ADD(num_ps_buf_frames); 351 DEBUGFS_ADD(inactive_ms); 352 DEBUGFS_ADD(connected_time); 353 DEBUGFS_ADD(last_seq_ctrl); 354 DEBUGFS_ADD(agg_status); 355 DEBUGFS_ADD(dev); 356 DEBUGFS_ADD(last_signal); 357 DEBUGFS_ADD(ht_capa); 358 359 DEBUGFS_ADD_COUNTER(rx_packets, rx_packets); 360 DEBUGFS_ADD_COUNTER(tx_packets, tx_packets); 361 DEBUGFS_ADD_COUNTER(rx_bytes, rx_bytes); 362 DEBUGFS_ADD_COUNTER(tx_bytes, tx_bytes); 363 DEBUGFS_ADD_COUNTER(rx_duplicates, num_duplicates); 364 DEBUGFS_ADD_COUNTER(rx_fragments, rx_fragments); 365 DEBUGFS_ADD_COUNTER(rx_dropped, rx_dropped); 366 DEBUGFS_ADD_COUNTER(tx_fragments, tx_fragments); 367 DEBUGFS_ADD_COUNTER(tx_filtered, tx_filtered_count); 368 DEBUGFS_ADD_COUNTER(tx_retry_failed, tx_retry_failed); 369 DEBUGFS_ADD_COUNTER(tx_retry_count, tx_retry_count); 370 DEBUGFS_ADD_COUNTER(wep_weak_iv_count, wep_weak_iv_count); 371 } 372 373 void ieee80211_sta_debugfs_remove(struct sta_info *sta) 374 { 375 debugfs_remove_recursive(sta->debugfs.dir); 376 sta->debugfs.dir = NULL; 377 } 378