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 * Copyright(c) 2016 Intel Deutschland GmbH 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 */ 12 13 #include <linux/debugfs.h> 14 #include <linux/ieee80211.h> 15 #include "ieee80211_i.h" 16 #include "debugfs.h" 17 #include "debugfs_sta.h" 18 #include "sta_info.h" 19 #include "driver-ops.h" 20 21 /* sta attributtes */ 22 23 #define STA_READ(name, field, format_string) \ 24 static ssize_t sta_ ##name## _read(struct file *file, \ 25 char __user *userbuf, \ 26 size_t count, loff_t *ppos) \ 27 { \ 28 struct sta_info *sta = file->private_data; \ 29 return mac80211_format_buffer(userbuf, count, ppos, \ 30 format_string, sta->field); \ 31 } 32 #define STA_READ_D(name, field) STA_READ(name, field, "%d\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 55 static const char * const sta_flag_names[] = { 56 #define FLAG(F) [WLAN_STA_##F] = #F 57 FLAG(AUTH), 58 FLAG(ASSOC), 59 FLAG(PS_STA), 60 FLAG(AUTHORIZED), 61 FLAG(SHORT_PREAMBLE), 62 FLAG(WDS), 63 FLAG(CLEAR_PS_FILT), 64 FLAG(MFP), 65 FLAG(BLOCK_BA), 66 FLAG(PS_DRIVER), 67 FLAG(PSPOLL), 68 FLAG(TDLS_PEER), 69 FLAG(TDLS_PEER_AUTH), 70 FLAG(TDLS_INITIATOR), 71 FLAG(TDLS_CHAN_SWITCH), 72 FLAG(TDLS_OFF_CHANNEL), 73 FLAG(TDLS_WIDER_BW), 74 FLAG(UAPSD), 75 FLAG(SP), 76 FLAG(4ADDR_EVENT), 77 FLAG(INSERTED), 78 FLAG(RATE_CONTROL), 79 FLAG(TOFFSET_KNOWN), 80 FLAG(MPSP_OWNER), 81 FLAG(MPSP_RECIPIENT), 82 FLAG(PS_DELIVER), 83 #undef FLAG 84 }; 85 86 static ssize_t sta_flags_read(struct file *file, char __user *userbuf, 87 size_t count, loff_t *ppos) 88 { 89 char buf[16 * NUM_WLAN_STA_FLAGS], *pos = buf; 90 char *end = buf + sizeof(buf) - 1; 91 struct sta_info *sta = file->private_data; 92 unsigned int flg; 93 94 BUILD_BUG_ON(ARRAY_SIZE(sta_flag_names) != NUM_WLAN_STA_FLAGS); 95 96 for (flg = 0; flg < NUM_WLAN_STA_FLAGS; flg++) { 97 if (test_sta_flag(sta, flg)) 98 pos += scnprintf(pos, end - pos, "%s\n", 99 sta_flag_names[flg]); 100 } 101 102 return simple_read_from_buffer(userbuf, count, ppos, buf, strlen(buf)); 103 } 104 STA_OPS(flags); 105 106 static ssize_t sta_num_ps_buf_frames_read(struct file *file, 107 char __user *userbuf, 108 size_t count, loff_t *ppos) 109 { 110 struct sta_info *sta = file->private_data; 111 char buf[17*IEEE80211_NUM_ACS], *p = buf; 112 int ac; 113 114 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 115 p += scnprintf(p, sizeof(buf)+buf-p, "AC%d: %d\n", ac, 116 skb_queue_len(&sta->ps_tx_buf[ac]) + 117 skb_queue_len(&sta->tx_filtered[ac])); 118 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); 119 } 120 STA_OPS(num_ps_buf_frames); 121 122 static ssize_t sta_last_seq_ctrl_read(struct file *file, char __user *userbuf, 123 size_t count, loff_t *ppos) 124 { 125 char buf[15*IEEE80211_NUM_TIDS], *p = buf; 126 int i; 127 struct sta_info *sta = file->private_data; 128 for (i = 0; i < IEEE80211_NUM_TIDS; i++) 129 p += scnprintf(p, sizeof(buf)+buf-p, "%x ", 130 le16_to_cpu(sta->last_seq_ctrl[i])); 131 p += scnprintf(p, sizeof(buf)+buf-p, "\n"); 132 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); 133 } 134 STA_OPS(last_seq_ctrl); 135 136 static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf, 137 size_t count, loff_t *ppos) 138 { 139 char buf[71 + IEEE80211_NUM_TIDS * 40], *p = buf; 140 int i; 141 struct sta_info *sta = file->private_data; 142 struct tid_ampdu_rx *tid_rx; 143 struct tid_ampdu_tx *tid_tx; 144 145 rcu_read_lock(); 146 147 p += scnprintf(p, sizeof(buf) + buf - p, "next dialog_token: %#02x\n", 148 sta->ampdu_mlme.dialog_token_allocator + 1); 149 p += scnprintf(p, sizeof(buf) + buf - p, 150 "TID\t\tRX\tDTKN\tSSN\t\tTX\tDTKN\tpending\n"); 151 152 for (i = 0; i < IEEE80211_NUM_TIDS; i++) { 153 tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[i]); 154 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[i]); 155 156 p += scnprintf(p, sizeof(buf) + buf - p, "%02d", i); 157 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_rx); 158 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x", 159 tid_rx ? tid_rx->dialog_token : 0); 160 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x", 161 tid_rx ? tid_rx->ssn : 0); 162 163 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_tx); 164 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x", 165 tid_tx ? tid_tx->dialog_token : 0); 166 p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d", 167 tid_tx ? skb_queue_len(&tid_tx->pending) : 0); 168 p += scnprintf(p, sizeof(buf) + buf - p, "\n"); 169 } 170 rcu_read_unlock(); 171 172 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); 173 } 174 175 static ssize_t sta_agg_status_write(struct file *file, const char __user *userbuf, 176 size_t count, loff_t *ppos) 177 { 178 char _buf[25] = {}, *buf = _buf; 179 struct sta_info *sta = file->private_data; 180 bool start, tx; 181 unsigned long tid; 182 char *pos; 183 int ret, timeout = 5000; 184 185 if (count > sizeof(_buf)) 186 return -EINVAL; 187 188 if (copy_from_user(buf, userbuf, count)) 189 return -EFAULT; 190 191 buf[sizeof(_buf) - 1] = '\0'; 192 pos = buf; 193 buf = strsep(&pos, " "); 194 if (!buf) 195 return -EINVAL; 196 197 if (!strcmp(buf, "tx")) 198 tx = true; 199 else if (!strcmp(buf, "rx")) 200 tx = false; 201 else 202 return -EINVAL; 203 204 buf = strsep(&pos, " "); 205 if (!buf) 206 return -EINVAL; 207 if (!strcmp(buf, "start")) { 208 start = true; 209 if (!tx) 210 return -EINVAL; 211 } else if (!strcmp(buf, "stop")) { 212 start = false; 213 } else { 214 return -EINVAL; 215 } 216 217 buf = strsep(&pos, " "); 218 if (!buf) 219 return -EINVAL; 220 if (sscanf(buf, "timeout=%d", &timeout) == 1) { 221 buf = strsep(&pos, " "); 222 if (!buf || !tx || !start) 223 return -EINVAL; 224 } 225 226 ret = kstrtoul(buf, 0, &tid); 227 if (ret || tid >= IEEE80211_NUM_TIDS) 228 return -EINVAL; 229 230 if (tx) { 231 if (start) 232 ret = ieee80211_start_tx_ba_session(&sta->sta, tid, 233 timeout); 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_vht_capa_read(struct file *file, char __user *userbuf, 329 size_t count, loff_t *ppos) 330 { 331 char buf[128], *p = buf; 332 struct sta_info *sta = file->private_data; 333 struct ieee80211_sta_vht_cap *vhtc = &sta->sta.vht_cap; 334 335 p += scnprintf(p, sizeof(buf) + buf - p, "VHT %ssupported\n", 336 vhtc->vht_supported ? "" : "not "); 337 if (vhtc->vht_supported) { 338 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.8x\n", vhtc->cap); 339 340 p += scnprintf(p, sizeof(buf)+buf-p, "RX MCS: %.4x\n", 341 le16_to_cpu(vhtc->vht_mcs.rx_mcs_map)); 342 if (vhtc->vht_mcs.rx_highest) 343 p += scnprintf(p, sizeof(buf)+buf-p, 344 "MCS RX highest: %d Mbps\n", 345 le16_to_cpu(vhtc->vht_mcs.rx_highest)); 346 p += scnprintf(p, sizeof(buf)+buf-p, "TX MCS: %.4x\n", 347 le16_to_cpu(vhtc->vht_mcs.tx_mcs_map)); 348 if (vhtc->vht_mcs.tx_highest) 349 p += scnprintf(p, sizeof(buf)+buf-p, 350 "MCS TX highest: %d Mbps\n", 351 le16_to_cpu(vhtc->vht_mcs.tx_highest)); 352 } 353 354 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); 355 } 356 STA_OPS(vht_capa); 357 358 359 #define DEBUGFS_ADD(name) \ 360 debugfs_create_file(#name, 0400, \ 361 sta->debugfs_dir, sta, &sta_ ##name## _ops); 362 363 #define DEBUGFS_ADD_COUNTER(name, field) \ 364 if (sizeof(sta->field) == sizeof(u32)) \ 365 debugfs_create_u32(#name, 0400, sta->debugfs_dir, \ 366 (u32 *) &sta->field); \ 367 else \ 368 debugfs_create_u64(#name, 0400, sta->debugfs_dir, \ 369 (u64 *) &sta->field); 370 371 void ieee80211_sta_debugfs_add(struct sta_info *sta) 372 { 373 struct ieee80211_local *local = sta->local; 374 struct ieee80211_sub_if_data *sdata = sta->sdata; 375 struct dentry *stations_dir = sta->sdata->debugfs.subdir_stations; 376 u8 mac[3*ETH_ALEN]; 377 378 if (!stations_dir) 379 return; 380 381 snprintf(mac, sizeof(mac), "%pM", sta->sta.addr); 382 383 /* 384 * This might fail due to a race condition: 385 * When mac80211 unlinks a station, the debugfs entries 386 * remain, but it is already possible to link a new 387 * station with the same address which triggers adding 388 * it to debugfs; therefore, if the old station isn't 389 * destroyed quickly enough the old station's debugfs 390 * dir might still be around. 391 */ 392 sta->debugfs_dir = debugfs_create_dir(mac, stations_dir); 393 if (!sta->debugfs_dir) 394 return; 395 396 DEBUGFS_ADD(flags); 397 DEBUGFS_ADD(num_ps_buf_frames); 398 DEBUGFS_ADD(last_seq_ctrl); 399 DEBUGFS_ADD(agg_status); 400 DEBUGFS_ADD(ht_capa); 401 DEBUGFS_ADD(vht_capa); 402 403 DEBUGFS_ADD_COUNTER(rx_duplicates, rx_stats.num_duplicates); 404 DEBUGFS_ADD_COUNTER(rx_fragments, rx_stats.fragments); 405 DEBUGFS_ADD_COUNTER(tx_filtered, status_stats.filtered); 406 407 if (sizeof(sta->driver_buffered_tids) == sizeof(u32)) 408 debugfs_create_x32("driver_buffered_tids", 0400, 409 sta->debugfs_dir, 410 (u32 *)&sta->driver_buffered_tids); 411 else 412 debugfs_create_x64("driver_buffered_tids", 0400, 413 sta->debugfs_dir, 414 (u64 *)&sta->driver_buffered_tids); 415 416 drv_sta_add_debugfs(local, sdata, &sta->sta, sta->debugfs_dir); 417 } 418 419 void ieee80211_sta_debugfs_remove(struct sta_info *sta) 420 { 421 struct ieee80211_local *local = sta->local; 422 struct ieee80211_sub_if_data *sdata = sta->sdata; 423 424 drv_sta_remove_debugfs(local, sdata, &sta->sta, sta->debugfs_dir); 425 debugfs_remove_recursive(sta->debugfs_dir); 426 sta->debugfs_dir = NULL; 427 } 428