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