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