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 * Copyright 2013-2014 Intel Mobile Communications GmbH 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License version 2 as 9 * published by the Free Software Foundation. 10 */ 11 12 #include <linux/debugfs.h> 13 #include <linux/ieee80211.h> 14 #include "ieee80211_i.h" 15 #include "debugfs.h" 16 #include "debugfs_sta.h" 17 #include "sta_info.h" 18 #include "driver-ops.h" 19 20 /* sta attributtes */ 21 22 #define STA_READ(name, field, format_string) \ 23 static ssize_t sta_ ##name## _read(struct file *file, \ 24 char __user *userbuf, \ 25 size_t count, loff_t *ppos) \ 26 { \ 27 struct sta_info *sta = file->private_data; \ 28 return mac80211_format_buffer(userbuf, count, ppos, \ 29 format_string, sta->field); \ 30 } 31 #define STA_READ_D(name, field) STA_READ(name, field, "%d\n") 32 #define STA_READ_U(name, field) STA_READ(name, field, "%u\n") 33 #define STA_READ_S(name, field) STA_READ(name, field, "%s\n") 34 35 #define STA_OPS(name) \ 36 static const struct file_operations sta_ ##name## _ops = { \ 37 .read = sta_##name##_read, \ 38 .open = simple_open, \ 39 .llseek = generic_file_llseek, \ 40 } 41 42 #define STA_OPS_RW(name) \ 43 static const struct file_operations sta_ ##name## _ops = { \ 44 .read = sta_##name##_read, \ 45 .write = sta_##name##_write, \ 46 .open = simple_open, \ 47 .llseek = generic_file_llseek, \ 48 } 49 50 #define STA_FILE(name, field, format) \ 51 STA_READ_##format(name, field) \ 52 STA_OPS(name) 53 54 STA_FILE(aid, sta.aid, D); 55 STA_FILE(dev, sdata->name, S); 56 STA_FILE(last_signal, last_signal, D); 57 STA_FILE(last_ack_signal, last_ack_signal, D); 58 STA_FILE(beacon_loss_count, beacon_loss_count, D); 59 60 static ssize_t sta_flags_read(struct file *file, char __user *userbuf, 61 size_t count, loff_t *ppos) 62 { 63 char buf[121]; 64 struct sta_info *sta = file->private_data; 65 66 #define TEST(flg) \ 67 test_sta_flag(sta, WLAN_STA_##flg) ? #flg "\n" : "" 68 69 int res = scnprintf(buf, sizeof(buf), 70 "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s", 71 TEST(AUTH), TEST(ASSOC), TEST(PS_STA), 72 TEST(PS_DRIVER), TEST(AUTHORIZED), 73 TEST(SHORT_PREAMBLE), 74 sta->sta.wme ? "WME\n" : "", 75 TEST(WDS), TEST(CLEAR_PS_FILT), 76 TEST(MFP), TEST(BLOCK_BA), TEST(PSPOLL), 77 TEST(UAPSD), TEST(SP), TEST(TDLS_PEER), 78 TEST(TDLS_PEER_AUTH), TEST(TDLS_INITIATOR), 79 TEST(TDLS_CHAN_SWITCH), TEST(TDLS_OFF_CHANNEL), 80 TEST(4ADDR_EVENT), TEST(INSERTED), 81 TEST(RATE_CONTROL), TEST(TOFFSET_KNOWN), 82 TEST(MPSP_OWNER), TEST(MPSP_RECIPIENT)); 83 #undef TEST 84 return simple_read_from_buffer(userbuf, count, ppos, buf, res); 85 } 86 STA_OPS(flags); 87 88 static ssize_t sta_num_ps_buf_frames_read(struct file *file, 89 char __user *userbuf, 90 size_t count, loff_t *ppos) 91 { 92 struct sta_info *sta = file->private_data; 93 char buf[17*IEEE80211_NUM_ACS], *p = buf; 94 int ac; 95 96 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 97 p += scnprintf(p, sizeof(buf)+buf-p, "AC%d: %d\n", ac, 98 skb_queue_len(&sta->ps_tx_buf[ac]) + 99 skb_queue_len(&sta->tx_filtered[ac])); 100 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); 101 } 102 STA_OPS(num_ps_buf_frames); 103 104 static ssize_t sta_inactive_ms_read(struct file *file, char __user *userbuf, 105 size_t count, loff_t *ppos) 106 { 107 struct sta_info *sta = file->private_data; 108 return mac80211_format_buffer(userbuf, count, ppos, "%d\n", 109 jiffies_to_msecs(jiffies - sta->last_rx)); 110 } 111 STA_OPS(inactive_ms); 112 113 114 static ssize_t sta_connected_time_read(struct file *file, char __user *userbuf, 115 size_t count, loff_t *ppos) 116 { 117 struct sta_info *sta = file->private_data; 118 struct timespec uptime; 119 struct tm result; 120 long connected_time_secs; 121 char buf[100]; 122 int res; 123 ktime_get_ts(&uptime); 124 connected_time_secs = uptime.tv_sec - sta->last_connected; 125 time_to_tm(connected_time_secs, 0, &result); 126 result.tm_year -= 70; 127 result.tm_mday -= 1; 128 res = scnprintf(buf, sizeof(buf), 129 "years - %ld\nmonths - %d\ndays - %d\nclock - %d:%d:%d\n\n", 130 result.tm_year, result.tm_mon, result.tm_mday, 131 result.tm_hour, result.tm_min, result.tm_sec); 132 return simple_read_from_buffer(userbuf, count, ppos, buf, res); 133 } 134 STA_OPS(connected_time); 135 136 137 138 static ssize_t sta_last_seq_ctrl_read(struct file *file, char __user *userbuf, 139 size_t count, loff_t *ppos) 140 { 141 char buf[15*IEEE80211_NUM_TIDS], *p = buf; 142 int i; 143 struct sta_info *sta = file->private_data; 144 for (i = 0; i < IEEE80211_NUM_TIDS; i++) 145 p += scnprintf(p, sizeof(buf)+buf-p, "%x ", 146 le16_to_cpu(sta->last_seq_ctrl[i])); 147 p += scnprintf(p, sizeof(buf)+buf-p, "\n"); 148 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); 149 } 150 STA_OPS(last_seq_ctrl); 151 152 static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf, 153 size_t count, loff_t *ppos) 154 { 155 char buf[71 + IEEE80211_NUM_TIDS * 40], *p = buf; 156 int i; 157 struct sta_info *sta = file->private_data; 158 struct tid_ampdu_rx *tid_rx; 159 struct tid_ampdu_tx *tid_tx; 160 161 rcu_read_lock(); 162 163 p += scnprintf(p, sizeof(buf) + buf - p, "next dialog_token: %#02x\n", 164 sta->ampdu_mlme.dialog_token_allocator + 1); 165 p += scnprintf(p, sizeof(buf) + buf - p, 166 "TID\t\tRX\tDTKN\tSSN\t\tTX\tDTKN\tpending\n"); 167 168 for (i = 0; i < IEEE80211_NUM_TIDS; i++) { 169 tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[i]); 170 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[i]); 171 172 p += scnprintf(p, sizeof(buf) + buf - p, "%02d", i); 173 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_rx); 174 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x", 175 tid_rx ? tid_rx->dialog_token : 0); 176 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x", 177 tid_rx ? tid_rx->ssn : 0); 178 179 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_tx); 180 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x", 181 tid_tx ? tid_tx->dialog_token : 0); 182 p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d", 183 tid_tx ? skb_queue_len(&tid_tx->pending) : 0); 184 p += scnprintf(p, sizeof(buf) + buf - p, "\n"); 185 } 186 rcu_read_unlock(); 187 188 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); 189 } 190 191 static ssize_t sta_agg_status_write(struct file *file, const char __user *userbuf, 192 size_t count, loff_t *ppos) 193 { 194 char _buf[12] = {}, *buf = _buf; 195 struct sta_info *sta = file->private_data; 196 bool start, tx; 197 unsigned long tid; 198 int ret; 199 200 if (count > sizeof(_buf)) 201 return -EINVAL; 202 203 if (copy_from_user(buf, userbuf, count)) 204 return -EFAULT; 205 206 buf[sizeof(_buf) - 1] = '\0'; 207 208 if (strncmp(buf, "tx ", 3) == 0) { 209 buf += 3; 210 tx = true; 211 } else if (strncmp(buf, "rx ", 3) == 0) { 212 buf += 3; 213 tx = false; 214 } else 215 return -EINVAL; 216 217 if (strncmp(buf, "start ", 6) == 0) { 218 buf += 6; 219 start = true; 220 if (!tx) 221 return -EINVAL; 222 } else if (strncmp(buf, "stop ", 5) == 0) { 223 buf += 5; 224 start = false; 225 } else 226 return -EINVAL; 227 228 ret = kstrtoul(buf, 0, &tid); 229 if (ret) 230 return ret; 231 232 if (tid >= IEEE80211_NUM_TIDS) 233 return -EINVAL; 234 235 if (tx) { 236 if (start) 237 ret = ieee80211_start_tx_ba_session(&sta->sta, tid, 5000); 238 else 239 ret = ieee80211_stop_tx_ba_session(&sta->sta, tid); 240 } else { 241 __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT, 242 3, true); 243 ret = 0; 244 } 245 246 return ret ?: count; 247 } 248 STA_OPS_RW(agg_status); 249 250 static ssize_t sta_ht_capa_read(struct file *file, char __user *userbuf, 251 size_t count, loff_t *ppos) 252 { 253 #define PRINT_HT_CAP(_cond, _str) \ 254 do { \ 255 if (_cond) \ 256 p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \ 257 } while (0) 258 char buf[512], *p = buf; 259 int i; 260 struct sta_info *sta = file->private_data; 261 struct ieee80211_sta_ht_cap *htc = &sta->sta.ht_cap; 262 263 p += scnprintf(p, sizeof(buf) + buf - p, "ht %ssupported\n", 264 htc->ht_supported ? "" : "not "); 265 if (htc->ht_supported) { 266 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.4x\n", htc->cap); 267 268 PRINT_HT_CAP((htc->cap & BIT(0)), "RX LDPC"); 269 PRINT_HT_CAP((htc->cap & BIT(1)), "HT20/HT40"); 270 PRINT_HT_CAP(!(htc->cap & BIT(1)), "HT20"); 271 272 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 0, "Static SM Power Save"); 273 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 1, "Dynamic SM Power Save"); 274 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 3, "SM Power Save disabled"); 275 276 PRINT_HT_CAP((htc->cap & BIT(4)), "RX Greenfield"); 277 PRINT_HT_CAP((htc->cap & BIT(5)), "RX HT20 SGI"); 278 PRINT_HT_CAP((htc->cap & BIT(6)), "RX HT40 SGI"); 279 PRINT_HT_CAP((htc->cap & BIT(7)), "TX STBC"); 280 281 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 0, "No RX STBC"); 282 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 1, "RX STBC 1-stream"); 283 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 2, "RX STBC 2-streams"); 284 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 3, "RX STBC 3-streams"); 285 286 PRINT_HT_CAP((htc->cap & BIT(10)), "HT Delayed Block Ack"); 287 288 PRINT_HT_CAP(!(htc->cap & BIT(11)), "Max AMSDU length: " 289 "3839 bytes"); 290 PRINT_HT_CAP((htc->cap & BIT(11)), "Max AMSDU length: " 291 "7935 bytes"); 292 293 /* 294 * For beacons and probe response this would mean the BSS 295 * does or does not allow the usage of DSSS/CCK HT40. 296 * Otherwise it means the STA does or does not use 297 * DSSS/CCK HT40. 298 */ 299 PRINT_HT_CAP((htc->cap & BIT(12)), "DSSS/CCK HT40"); 300 PRINT_HT_CAP(!(htc->cap & BIT(12)), "No DSSS/CCK HT40"); 301 302 /* BIT(13) is reserved */ 303 304 PRINT_HT_CAP((htc->cap & BIT(14)), "40 MHz Intolerant"); 305 306 PRINT_HT_CAP((htc->cap & BIT(15)), "L-SIG TXOP protection"); 307 308 p += scnprintf(p, sizeof(buf)+buf-p, "ampdu factor/density: %d/%d\n", 309 htc->ampdu_factor, htc->ampdu_density); 310 p += scnprintf(p, sizeof(buf)+buf-p, "MCS mask:"); 311 312 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) 313 p += scnprintf(p, sizeof(buf)+buf-p, " %.2x", 314 htc->mcs.rx_mask[i]); 315 p += scnprintf(p, sizeof(buf)+buf-p, "\n"); 316 317 /* If not set this is meaningless */ 318 if (le16_to_cpu(htc->mcs.rx_highest)) { 319 p += scnprintf(p, sizeof(buf)+buf-p, 320 "MCS rx highest: %d Mbps\n", 321 le16_to_cpu(htc->mcs.rx_highest)); 322 } 323 324 p += scnprintf(p, sizeof(buf)+buf-p, "MCS tx params: %x\n", 325 htc->mcs.tx_params); 326 } 327 328 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); 329 } 330 STA_OPS(ht_capa); 331 332 static ssize_t sta_vht_capa_read(struct file *file, char __user *userbuf, 333 size_t count, loff_t *ppos) 334 { 335 char buf[128], *p = buf; 336 struct sta_info *sta = file->private_data; 337 struct ieee80211_sta_vht_cap *vhtc = &sta->sta.vht_cap; 338 339 p += scnprintf(p, sizeof(buf) + buf - p, "VHT %ssupported\n", 340 vhtc->vht_supported ? "" : "not "); 341 if (vhtc->vht_supported) { 342 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.8x\n", vhtc->cap); 343 344 p += scnprintf(p, sizeof(buf)+buf-p, "RX MCS: %.4x\n", 345 le16_to_cpu(vhtc->vht_mcs.rx_mcs_map)); 346 if (vhtc->vht_mcs.rx_highest) 347 p += scnprintf(p, sizeof(buf)+buf-p, 348 "MCS RX highest: %d Mbps\n", 349 le16_to_cpu(vhtc->vht_mcs.rx_highest)); 350 p += scnprintf(p, sizeof(buf)+buf-p, "TX MCS: %.4x\n", 351 le16_to_cpu(vhtc->vht_mcs.tx_mcs_map)); 352 if (vhtc->vht_mcs.tx_highest) 353 p += scnprintf(p, sizeof(buf)+buf-p, 354 "MCS TX highest: %d Mbps\n", 355 le16_to_cpu(vhtc->vht_mcs.tx_highest)); 356 } 357 358 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); 359 } 360 STA_OPS(vht_capa); 361 362 static ssize_t sta_current_tx_rate_read(struct file *file, char __user *userbuf, 363 size_t count, loff_t *ppos) 364 { 365 struct sta_info *sta = file->private_data; 366 struct rate_info rinfo; 367 u16 rate; 368 sta_set_rate_info_tx(sta, &sta->last_tx_rate, &rinfo); 369 rate = cfg80211_calculate_bitrate(&rinfo); 370 371 return mac80211_format_buffer(userbuf, count, ppos, 372 "%d.%d MBit/s\n", 373 rate/10, rate%10); 374 } 375 STA_OPS(current_tx_rate); 376 377 static ssize_t sta_last_rx_rate_read(struct file *file, char __user *userbuf, 378 size_t count, loff_t *ppos) 379 { 380 struct sta_info *sta = file->private_data; 381 struct rate_info rinfo; 382 u16 rate; 383 384 sta_set_rate_info_rx(sta, &rinfo); 385 386 rate = cfg80211_calculate_bitrate(&rinfo); 387 388 return mac80211_format_buffer(userbuf, count, ppos, 389 "%d.%d MBit/s\n", 390 rate/10, rate%10); 391 } 392 STA_OPS(last_rx_rate); 393 394 #define DEBUGFS_ADD(name) \ 395 debugfs_create_file(#name, 0400, \ 396 sta->debugfs.dir, sta, &sta_ ##name## _ops); 397 398 #define DEBUGFS_ADD_COUNTER(name, field) \ 399 if (sizeof(sta->field) == sizeof(u32)) \ 400 debugfs_create_u32(#name, 0400, sta->debugfs.dir, \ 401 (u32 *) &sta->field); \ 402 else \ 403 debugfs_create_u64(#name, 0400, sta->debugfs.dir, \ 404 (u64 *) &sta->field); 405 406 void ieee80211_sta_debugfs_add(struct sta_info *sta) 407 { 408 struct ieee80211_local *local = sta->local; 409 struct ieee80211_sub_if_data *sdata = sta->sdata; 410 struct dentry *stations_dir = sta->sdata->debugfs.subdir_stations; 411 u8 mac[3*ETH_ALEN]; 412 413 sta->debugfs.add_has_run = true; 414 415 if (!stations_dir) 416 return; 417 418 snprintf(mac, sizeof(mac), "%pM", sta->sta.addr); 419 420 /* 421 * This might fail due to a race condition: 422 * When mac80211 unlinks a station, the debugfs entries 423 * remain, but it is already possible to link a new 424 * station with the same address which triggers adding 425 * it to debugfs; therefore, if the old station isn't 426 * destroyed quickly enough the old station's debugfs 427 * dir might still be around. 428 */ 429 sta->debugfs.dir = debugfs_create_dir(mac, stations_dir); 430 if (!sta->debugfs.dir) 431 return; 432 433 DEBUGFS_ADD(flags); 434 DEBUGFS_ADD(num_ps_buf_frames); 435 DEBUGFS_ADD(inactive_ms); 436 DEBUGFS_ADD(connected_time); 437 DEBUGFS_ADD(last_seq_ctrl); 438 DEBUGFS_ADD(agg_status); 439 DEBUGFS_ADD(dev); 440 DEBUGFS_ADD(last_signal); 441 DEBUGFS_ADD(beacon_loss_count); 442 DEBUGFS_ADD(ht_capa); 443 DEBUGFS_ADD(vht_capa); 444 DEBUGFS_ADD(last_ack_signal); 445 DEBUGFS_ADD(current_tx_rate); 446 DEBUGFS_ADD(last_rx_rate); 447 448 DEBUGFS_ADD_COUNTER(rx_packets, rx_packets); 449 DEBUGFS_ADD_COUNTER(tx_packets, tx_packets); 450 DEBUGFS_ADD_COUNTER(rx_bytes, rx_bytes); 451 DEBUGFS_ADD_COUNTER(tx_bytes, tx_bytes); 452 DEBUGFS_ADD_COUNTER(rx_duplicates, num_duplicates); 453 DEBUGFS_ADD_COUNTER(rx_fragments, rx_fragments); 454 DEBUGFS_ADD_COUNTER(rx_dropped, rx_dropped); 455 DEBUGFS_ADD_COUNTER(tx_fragments, tx_fragments); 456 DEBUGFS_ADD_COUNTER(tx_filtered, tx_filtered_count); 457 DEBUGFS_ADD_COUNTER(tx_retry_failed, tx_retry_failed); 458 DEBUGFS_ADD_COUNTER(tx_retry_count, tx_retry_count); 459 460 if (sizeof(sta->driver_buffered_tids) == sizeof(u32)) 461 debugfs_create_x32("driver_buffered_tids", 0400, 462 sta->debugfs.dir, 463 (u32 *)&sta->driver_buffered_tids); 464 else 465 debugfs_create_x64("driver_buffered_tids", 0400, 466 sta->debugfs.dir, 467 (u64 *)&sta->driver_buffered_tids); 468 469 drv_sta_add_debugfs(local, sdata, &sta->sta, sta->debugfs.dir); 470 } 471 472 void ieee80211_sta_debugfs_remove(struct sta_info *sta) 473 { 474 struct ieee80211_local *local = sta->local; 475 struct ieee80211_sub_if_data *sdata = sta->sdata; 476 477 drv_sta_remove_debugfs(local, sdata, &sta->sta, sta->debugfs.dir); 478 debugfs_remove_recursive(sta->debugfs.dir); 479 sta->debugfs.dir = NULL; 480 } 481