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 #include "driver-ops.h" 18 19 /* sta attributtes */ 20 21 #define STA_READ(name, field, format_string) \ 22 static ssize_t sta_ ##name## _read(struct file *file, \ 23 char __user *userbuf, \ 24 size_t count, loff_t *ppos) \ 25 { \ 26 struct sta_info *sta = file->private_data; \ 27 return mac80211_format_buffer(userbuf, count, ppos, \ 28 format_string, sta->field); \ 29 } 30 #define STA_READ_D(name, field) STA_READ(name, field, "%d\n") 31 #define STA_READ_U(name, field) STA_READ(name, field, "%u\n") 32 #define STA_READ_S(name, field) STA_READ(name, field, "%s\n") 33 34 #define STA_OPS(name) \ 35 static const struct file_operations sta_ ##name## _ops = { \ 36 .read = sta_##name##_read, \ 37 .open = simple_open, \ 38 .llseek = generic_file_llseek, \ 39 } 40 41 #define STA_OPS_RW(name) \ 42 static const struct file_operations sta_ ##name## _ops = { \ 43 .read = sta_##name##_read, \ 44 .write = sta_##name##_write, \ 45 .open = simple_open, \ 46 .llseek = generic_file_llseek, \ 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->name, S); 55 STA_FILE(last_signal, last_signal, D); 56 STA_FILE(last_ack_signal, last_ack_signal, D); 57 STA_FILE(beacon_loss_count, beacon_loss_count, D); 58 59 static ssize_t sta_flags_read(struct file *file, char __user *userbuf, 60 size_t count, loff_t *ppos) 61 { 62 char buf[121]; 63 struct sta_info *sta = file->private_data; 64 65 #define TEST(flg) \ 66 test_sta_flag(sta, WLAN_STA_##flg) ? #flg "\n" : "" 67 68 int res = scnprintf(buf, sizeof(buf), 69 "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s", 70 TEST(AUTH), TEST(ASSOC), TEST(PS_STA), 71 TEST(PS_DRIVER), TEST(AUTHORIZED), 72 TEST(SHORT_PREAMBLE), 73 TEST(WME), TEST(WDS), TEST(CLEAR_PS_FILT), 74 TEST(MFP), TEST(BLOCK_BA), TEST(PSPOLL), 75 TEST(UAPSD), TEST(SP), TEST(TDLS_PEER), 76 TEST(TDLS_PEER_AUTH), TEST(4ADDR_EVENT), 77 TEST(INSERTED), TEST(RATE_CONTROL), 78 TEST(TOFFSET_KNOWN), TEST(MPSP_OWNER), 79 TEST(MPSP_RECIPIENT)); 80 #undef TEST 81 return simple_read_from_buffer(userbuf, count, ppos, buf, res); 82 } 83 STA_OPS(flags); 84 85 static ssize_t sta_num_ps_buf_frames_read(struct file *file, 86 char __user *userbuf, 87 size_t count, loff_t *ppos) 88 { 89 struct sta_info *sta = file->private_data; 90 char buf[17*IEEE80211_NUM_ACS], *p = buf; 91 int ac; 92 93 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 94 p += scnprintf(p, sizeof(buf)+buf-p, "AC%d: %d\n", ac, 95 skb_queue_len(&sta->ps_tx_buf[ac]) + 96 skb_queue_len(&sta->tx_filtered[ac])); 97 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); 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 struct sta_info *sta = file->private_data; 105 return mac80211_format_buffer(userbuf, count, ppos, "%d\n", 106 jiffies_to_msecs(jiffies - sta->last_rx)); 107 } 108 STA_OPS(inactive_ms); 109 110 111 static ssize_t sta_connected_time_read(struct file *file, char __user *userbuf, 112 size_t count, loff_t *ppos) 113 { 114 struct sta_info *sta = file->private_data; 115 struct timespec uptime; 116 struct tm result; 117 long connected_time_secs; 118 char buf[100]; 119 int res; 120 do_posix_clock_monotonic_gettime(&uptime); 121 connected_time_secs = uptime.tv_sec - sta->last_connected; 122 time_to_tm(connected_time_secs, 0, &result); 123 result.tm_year -= 70; 124 result.tm_mday -= 1; 125 res = scnprintf(buf, sizeof(buf), 126 "years - %ld\nmonths - %d\ndays - %d\nclock - %d:%d:%d\n\n", 127 result.tm_year, result.tm_mon, result.tm_mday, 128 result.tm_hour, result.tm_min, result.tm_sec); 129 return simple_read_from_buffer(userbuf, count, ppos, buf, res); 130 } 131 STA_OPS(connected_time); 132 133 134 135 static ssize_t sta_last_seq_ctrl_read(struct file *file, char __user *userbuf, 136 size_t count, loff_t *ppos) 137 { 138 char buf[15*IEEE80211_NUM_TIDS], *p = buf; 139 int i; 140 struct sta_info *sta = file->private_data; 141 for (i = 0; i < IEEE80211_NUM_TIDS; i++) 142 p += scnprintf(p, sizeof(buf)+buf-p, "%x ", 143 le16_to_cpu(sta->last_seq_ctrl[i])); 144 p += scnprintf(p, sizeof(buf)+buf-p, "\n"); 145 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); 146 } 147 STA_OPS(last_seq_ctrl); 148 149 static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf, 150 size_t count, loff_t *ppos) 151 { 152 char buf[71 + IEEE80211_NUM_TIDS * 40], *p = buf; 153 int i; 154 struct sta_info *sta = file->private_data; 155 struct tid_ampdu_rx *tid_rx; 156 struct tid_ampdu_tx *tid_tx; 157 158 rcu_read_lock(); 159 160 p += scnprintf(p, sizeof(buf) + buf - p, "next dialog_token: %#02x\n", 161 sta->ampdu_mlme.dialog_token_allocator + 1); 162 p += scnprintf(p, sizeof(buf) + buf - p, 163 "TID\t\tRX active\tDTKN\tSSN\t\tTX\tDTKN\tpending\n"); 164 165 for (i = 0; i < IEEE80211_NUM_TIDS; i++) { 166 tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[i]); 167 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[i]); 168 169 p += scnprintf(p, sizeof(buf) + buf - p, "%02d", i); 170 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_rx); 171 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x", 172 tid_rx ? tid_rx->dialog_token : 0); 173 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x", 174 tid_rx ? tid_rx->ssn : 0); 175 176 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_tx); 177 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x", 178 tid_tx ? tid_tx->dialog_token : 0); 179 p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d", 180 tid_tx ? skb_queue_len(&tid_tx->pending) : 0); 181 p += scnprintf(p, sizeof(buf) + buf - p, "\n"); 182 } 183 rcu_read_unlock(); 184 185 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); 186 } 187 188 static ssize_t sta_agg_status_write(struct file *file, const char __user *userbuf, 189 size_t count, loff_t *ppos) 190 { 191 char _buf[12], *buf = _buf; 192 struct sta_info *sta = file->private_data; 193 bool start, tx; 194 unsigned long tid; 195 int ret; 196 197 if (count > sizeof(_buf)) 198 return -EINVAL; 199 200 if (copy_from_user(buf, userbuf, count)) 201 return -EFAULT; 202 203 buf[sizeof(_buf) - 1] = '\0'; 204 205 if (strncmp(buf, "tx ", 3) == 0) { 206 buf += 3; 207 tx = true; 208 } else if (strncmp(buf, "rx ", 3) == 0) { 209 buf += 3; 210 tx = false; 211 } else 212 return -EINVAL; 213 214 if (strncmp(buf, "start ", 6) == 0) { 215 buf += 6; 216 start = true; 217 if (!tx) 218 return -EINVAL; 219 } else if (strncmp(buf, "stop ", 5) == 0) { 220 buf += 5; 221 start = false; 222 } else 223 return -EINVAL; 224 225 ret = kstrtoul(buf, 0, &tid); 226 if (ret) 227 return ret; 228 229 if (tid >= IEEE80211_NUM_TIDS) 230 return -EINVAL; 231 232 if (tx) { 233 if (start) 234 ret = ieee80211_start_tx_ba_session(&sta->sta, tid, 5000); 235 else 236 ret = ieee80211_stop_tx_ba_session(&sta->sta, tid); 237 } else { 238 __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT, 239 3, true); 240 ret = 0; 241 } 242 243 return ret ?: count; 244 } 245 STA_OPS_RW(agg_status); 246 247 static ssize_t sta_ht_capa_read(struct file *file, char __user *userbuf, 248 size_t count, loff_t *ppos) 249 { 250 #define PRINT_HT_CAP(_cond, _str) \ 251 do { \ 252 if (_cond) \ 253 p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \ 254 } while (0) 255 char buf[512], *p = buf; 256 int i; 257 struct sta_info *sta = file->private_data; 258 struct ieee80211_sta_ht_cap *htc = &sta->sta.ht_cap; 259 260 p += scnprintf(p, sizeof(buf) + buf - p, "ht %ssupported\n", 261 htc->ht_supported ? "" : "not "); 262 if (htc->ht_supported) { 263 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.4x\n", htc->cap); 264 265 PRINT_HT_CAP((htc->cap & BIT(0)), "RX LDPC"); 266 PRINT_HT_CAP((htc->cap & BIT(1)), "HT20/HT40"); 267 PRINT_HT_CAP(!(htc->cap & BIT(1)), "HT20"); 268 269 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 0, "Static SM Power Save"); 270 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 1, "Dynamic SM Power Save"); 271 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 3, "SM Power Save disabled"); 272 273 PRINT_HT_CAP((htc->cap & BIT(4)), "RX Greenfield"); 274 PRINT_HT_CAP((htc->cap & BIT(5)), "RX HT20 SGI"); 275 PRINT_HT_CAP((htc->cap & BIT(6)), "RX HT40 SGI"); 276 PRINT_HT_CAP((htc->cap & BIT(7)), "TX STBC"); 277 278 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 0, "No RX STBC"); 279 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 1, "RX STBC 1-stream"); 280 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 2, "RX STBC 2-streams"); 281 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 3, "RX STBC 3-streams"); 282 283 PRINT_HT_CAP((htc->cap & BIT(10)), "HT Delayed Block Ack"); 284 285 PRINT_HT_CAP(!(htc->cap & BIT(11)), "Max AMSDU length: " 286 "3839 bytes"); 287 PRINT_HT_CAP((htc->cap & BIT(11)), "Max AMSDU length: " 288 "7935 bytes"); 289 290 /* 291 * For beacons and probe response this would mean the BSS 292 * does or does not allow the usage of DSSS/CCK HT40. 293 * Otherwise it means the STA does or does not use 294 * DSSS/CCK HT40. 295 */ 296 PRINT_HT_CAP((htc->cap & BIT(12)), "DSSS/CCK HT40"); 297 PRINT_HT_CAP(!(htc->cap & BIT(12)), "No DSSS/CCK HT40"); 298 299 /* BIT(13) is reserved */ 300 301 PRINT_HT_CAP((htc->cap & BIT(14)), "40 MHz Intolerant"); 302 303 PRINT_HT_CAP((htc->cap & BIT(15)), "L-SIG TXOP protection"); 304 305 p += scnprintf(p, sizeof(buf)+buf-p, "ampdu factor/density: %d/%d\n", 306 htc->ampdu_factor, htc->ampdu_density); 307 p += scnprintf(p, sizeof(buf)+buf-p, "MCS mask:"); 308 309 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) 310 p += scnprintf(p, sizeof(buf)+buf-p, " %.2x", 311 htc->mcs.rx_mask[i]); 312 p += scnprintf(p, sizeof(buf)+buf-p, "\n"); 313 314 /* If not set this is meaningless */ 315 if (le16_to_cpu(htc->mcs.rx_highest)) { 316 p += scnprintf(p, sizeof(buf)+buf-p, 317 "MCS rx highest: %d Mbps\n", 318 le16_to_cpu(htc->mcs.rx_highest)); 319 } 320 321 p += scnprintf(p, sizeof(buf)+buf-p, "MCS tx params: %x\n", 322 htc->mcs.tx_params); 323 } 324 325 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); 326 } 327 STA_OPS(ht_capa); 328 329 static ssize_t sta_vht_capa_read(struct file *file, char __user *userbuf, 330 size_t count, loff_t *ppos) 331 { 332 char buf[128], *p = buf; 333 struct sta_info *sta = file->private_data; 334 struct ieee80211_sta_vht_cap *vhtc = &sta->sta.vht_cap; 335 336 p += scnprintf(p, sizeof(buf) + buf - p, "VHT %ssupported\n", 337 vhtc->vht_supported ? "" : "not "); 338 if (vhtc->vht_supported) { 339 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.8x\n", vhtc->cap); 340 341 p += scnprintf(p, sizeof(buf)+buf-p, "RX MCS: %.4x\n", 342 le16_to_cpu(vhtc->vht_mcs.rx_mcs_map)); 343 if (vhtc->vht_mcs.rx_highest) 344 p += scnprintf(p, sizeof(buf)+buf-p, 345 "MCS RX highest: %d Mbps\n", 346 le16_to_cpu(vhtc->vht_mcs.rx_highest)); 347 p += scnprintf(p, sizeof(buf)+buf-p, "TX MCS: %.4x\n", 348 le16_to_cpu(vhtc->vht_mcs.tx_mcs_map)); 349 if (vhtc->vht_mcs.tx_highest) 350 p += scnprintf(p, sizeof(buf)+buf-p, 351 "MCS TX highest: %d Mbps\n", 352 le16_to_cpu(vhtc->vht_mcs.tx_highest)); 353 } 354 355 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); 356 } 357 STA_OPS(vht_capa); 358 359 static ssize_t sta_current_tx_rate_read(struct file *file, char __user *userbuf, 360 size_t count, loff_t *ppos) 361 { 362 struct sta_info *sta = file->private_data; 363 struct rate_info rinfo; 364 u16 rate; 365 sta_set_rate_info_tx(sta, &sta->last_tx_rate, &rinfo); 366 rate = cfg80211_calculate_bitrate(&rinfo); 367 368 return mac80211_format_buffer(userbuf, count, ppos, 369 "%d.%d MBit/s\n", 370 rate/10, rate%10); 371 } 372 STA_OPS(current_tx_rate); 373 374 static ssize_t sta_last_rx_rate_read(struct file *file, char __user *userbuf, 375 size_t count, loff_t *ppos) 376 { 377 struct sta_info *sta = file->private_data; 378 struct rate_info rinfo; 379 u16 rate; 380 381 sta_set_rate_info_rx(sta, &rinfo); 382 383 rate = cfg80211_calculate_bitrate(&rinfo); 384 385 return mac80211_format_buffer(userbuf, count, ppos, 386 "%d.%d MBit/s\n", 387 rate/10, rate%10); 388 } 389 STA_OPS(last_rx_rate); 390 391 #define DEBUGFS_ADD(name) \ 392 debugfs_create_file(#name, 0400, \ 393 sta->debugfs.dir, sta, &sta_ ##name## _ops); 394 395 #define DEBUGFS_ADD_COUNTER(name, field) \ 396 if (sizeof(sta->field) == sizeof(u32)) \ 397 debugfs_create_u32(#name, 0400, sta->debugfs.dir, \ 398 (u32 *) &sta->field); \ 399 else \ 400 debugfs_create_u64(#name, 0400, sta->debugfs.dir, \ 401 (u64 *) &sta->field); 402 403 void ieee80211_sta_debugfs_add(struct sta_info *sta) 404 { 405 struct ieee80211_local *local = sta->local; 406 struct ieee80211_sub_if_data *sdata = sta->sdata; 407 struct dentry *stations_dir = sta->sdata->debugfs.subdir_stations; 408 u8 mac[3*ETH_ALEN]; 409 410 sta->debugfs.add_has_run = true; 411 412 if (!stations_dir) 413 return; 414 415 snprintf(mac, sizeof(mac), "%pM", sta->sta.addr); 416 417 /* 418 * This might fail due to a race condition: 419 * When mac80211 unlinks a station, the debugfs entries 420 * remain, but it is already possible to link a new 421 * station with the same address which triggers adding 422 * it to debugfs; therefore, if the old station isn't 423 * destroyed quickly enough the old station's debugfs 424 * dir might still be around. 425 */ 426 sta->debugfs.dir = debugfs_create_dir(mac, stations_dir); 427 if (!sta->debugfs.dir) 428 return; 429 430 DEBUGFS_ADD(flags); 431 DEBUGFS_ADD(num_ps_buf_frames); 432 DEBUGFS_ADD(inactive_ms); 433 DEBUGFS_ADD(connected_time); 434 DEBUGFS_ADD(last_seq_ctrl); 435 DEBUGFS_ADD(agg_status); 436 DEBUGFS_ADD(dev); 437 DEBUGFS_ADD(last_signal); 438 DEBUGFS_ADD(beacon_loss_count); 439 DEBUGFS_ADD(ht_capa); 440 DEBUGFS_ADD(vht_capa); 441 DEBUGFS_ADD(last_ack_signal); 442 DEBUGFS_ADD(current_tx_rate); 443 DEBUGFS_ADD(last_rx_rate); 444 445 DEBUGFS_ADD_COUNTER(rx_packets, rx_packets); 446 DEBUGFS_ADD_COUNTER(tx_packets, tx_packets); 447 DEBUGFS_ADD_COUNTER(rx_bytes, rx_bytes); 448 DEBUGFS_ADD_COUNTER(tx_bytes, tx_bytes); 449 DEBUGFS_ADD_COUNTER(rx_duplicates, num_duplicates); 450 DEBUGFS_ADD_COUNTER(rx_fragments, rx_fragments); 451 DEBUGFS_ADD_COUNTER(rx_dropped, rx_dropped); 452 DEBUGFS_ADD_COUNTER(tx_fragments, tx_fragments); 453 DEBUGFS_ADD_COUNTER(tx_filtered, tx_filtered_count); 454 DEBUGFS_ADD_COUNTER(tx_retry_failed, tx_retry_failed); 455 DEBUGFS_ADD_COUNTER(tx_retry_count, tx_retry_count); 456 DEBUGFS_ADD_COUNTER(wep_weak_iv_count, wep_weak_iv_count); 457 458 drv_sta_add_debugfs(local, sdata, &sta->sta, sta->debugfs.dir); 459 } 460 461 void ieee80211_sta_debugfs_remove(struct sta_info *sta) 462 { 463 struct ieee80211_local *local = sta->local; 464 struct ieee80211_sub_if_data *sdata = sta->sdata; 465 466 drv_sta_remove_debugfs(local, sdata, &sta->sta, sta->debugfs.dir); 467 debugfs_remove_recursive(sta->debugfs.dir); 468 sta->debugfs.dir = NULL; 469 } 470