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