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 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 54 static ssize_t sta_flags_read(struct file *file, char __user *userbuf, 55 size_t count, loff_t *ppos) 56 { 57 char buf[121]; 58 struct sta_info *sta = file->private_data; 59 60 #define TEST(flg) \ 61 test_sta_flag(sta, WLAN_STA_##flg) ? #flg "\n" : "" 62 63 int res = scnprintf(buf, sizeof(buf), 64 "%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", 65 TEST(AUTH), TEST(ASSOC), TEST(PS_STA), 66 TEST(PS_DRIVER), TEST(AUTHORIZED), 67 TEST(SHORT_PREAMBLE), 68 sta->sta.wme ? "WME\n" : "", 69 TEST(WDS), TEST(CLEAR_PS_FILT), 70 TEST(MFP), TEST(BLOCK_BA), TEST(PSPOLL), 71 TEST(UAPSD), TEST(SP), TEST(TDLS_PEER), 72 TEST(TDLS_PEER_AUTH), TEST(TDLS_INITIATOR), 73 TEST(TDLS_CHAN_SWITCH), TEST(TDLS_OFF_CHANNEL), 74 TEST(4ADDR_EVENT), TEST(INSERTED), 75 TEST(RATE_CONTROL), TEST(TOFFSET_KNOWN), 76 TEST(MPSP_OWNER), TEST(MPSP_RECIPIENT)); 77 #undef TEST 78 return simple_read_from_buffer(userbuf, count, ppos, buf, res); 79 } 80 STA_OPS(flags); 81 82 static ssize_t sta_num_ps_buf_frames_read(struct file *file, 83 char __user *userbuf, 84 size_t count, loff_t *ppos) 85 { 86 struct sta_info *sta = file->private_data; 87 char buf[17*IEEE80211_NUM_ACS], *p = buf; 88 int ac; 89 90 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 91 p += scnprintf(p, sizeof(buf)+buf-p, "AC%d: %d\n", ac, 92 skb_queue_len(&sta->ps_tx_buf[ac]) + 93 skb_queue_len(&sta->tx_filtered[ac])); 94 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); 95 } 96 STA_OPS(num_ps_buf_frames); 97 98 static ssize_t sta_last_seq_ctrl_read(struct file *file, char __user *userbuf, 99 size_t count, loff_t *ppos) 100 { 101 char buf[15*IEEE80211_NUM_TIDS], *p = buf; 102 int i; 103 struct sta_info *sta = file->private_data; 104 for (i = 0; i < IEEE80211_NUM_TIDS; i++) 105 p += scnprintf(p, sizeof(buf)+buf-p, "%x ", 106 le16_to_cpu(sta->last_seq_ctrl[i])); 107 p += scnprintf(p, sizeof(buf)+buf-p, "\n"); 108 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); 109 } 110 STA_OPS(last_seq_ctrl); 111 112 static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf, 113 size_t count, loff_t *ppos) 114 { 115 char buf[71 + IEEE80211_NUM_TIDS * 40], *p = buf; 116 int i; 117 struct sta_info *sta = file->private_data; 118 struct tid_ampdu_rx *tid_rx; 119 struct tid_ampdu_tx *tid_tx; 120 121 rcu_read_lock(); 122 123 p += scnprintf(p, sizeof(buf) + buf - p, "next dialog_token: %#02x\n", 124 sta->ampdu_mlme.dialog_token_allocator + 1); 125 p += scnprintf(p, sizeof(buf) + buf - p, 126 "TID\t\tRX\tDTKN\tSSN\t\tTX\tDTKN\tpending\n"); 127 128 for (i = 0; i < IEEE80211_NUM_TIDS; i++) { 129 tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[i]); 130 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[i]); 131 132 p += scnprintf(p, sizeof(buf) + buf - p, "%02d", i); 133 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_rx); 134 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x", 135 tid_rx ? tid_rx->dialog_token : 0); 136 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x", 137 tid_rx ? tid_rx->ssn : 0); 138 139 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_tx); 140 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x", 141 tid_tx ? tid_tx->dialog_token : 0); 142 p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d", 143 tid_tx ? skb_queue_len(&tid_tx->pending) : 0); 144 p += scnprintf(p, sizeof(buf) + buf - p, "\n"); 145 } 146 rcu_read_unlock(); 147 148 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); 149 } 150 151 static ssize_t sta_agg_status_write(struct file *file, const char __user *userbuf, 152 size_t count, loff_t *ppos) 153 { 154 char _buf[12] = {}, *buf = _buf; 155 struct sta_info *sta = file->private_data; 156 bool start, tx; 157 unsigned long tid; 158 int ret; 159 160 if (count > sizeof(_buf)) 161 return -EINVAL; 162 163 if (copy_from_user(buf, userbuf, count)) 164 return -EFAULT; 165 166 buf[sizeof(_buf) - 1] = '\0'; 167 168 if (strncmp(buf, "tx ", 3) == 0) { 169 buf += 3; 170 tx = true; 171 } else if (strncmp(buf, "rx ", 3) == 0) { 172 buf += 3; 173 tx = false; 174 } else 175 return -EINVAL; 176 177 if (strncmp(buf, "start ", 6) == 0) { 178 buf += 6; 179 start = true; 180 if (!tx) 181 return -EINVAL; 182 } else if (strncmp(buf, "stop ", 5) == 0) { 183 buf += 5; 184 start = false; 185 } else 186 return -EINVAL; 187 188 ret = kstrtoul(buf, 0, &tid); 189 if (ret) 190 return ret; 191 192 if (tid >= IEEE80211_NUM_TIDS) 193 return -EINVAL; 194 195 if (tx) { 196 if (start) 197 ret = ieee80211_start_tx_ba_session(&sta->sta, tid, 5000); 198 else 199 ret = ieee80211_stop_tx_ba_session(&sta->sta, tid); 200 } else { 201 __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT, 202 3, true); 203 ret = 0; 204 } 205 206 return ret ?: count; 207 } 208 STA_OPS_RW(agg_status); 209 210 static ssize_t sta_ht_capa_read(struct file *file, char __user *userbuf, 211 size_t count, loff_t *ppos) 212 { 213 #define PRINT_HT_CAP(_cond, _str) \ 214 do { \ 215 if (_cond) \ 216 p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \ 217 } while (0) 218 char buf[512], *p = buf; 219 int i; 220 struct sta_info *sta = file->private_data; 221 struct ieee80211_sta_ht_cap *htc = &sta->sta.ht_cap; 222 223 p += scnprintf(p, sizeof(buf) + buf - p, "ht %ssupported\n", 224 htc->ht_supported ? "" : "not "); 225 if (htc->ht_supported) { 226 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.4x\n", htc->cap); 227 228 PRINT_HT_CAP((htc->cap & BIT(0)), "RX LDPC"); 229 PRINT_HT_CAP((htc->cap & BIT(1)), "HT20/HT40"); 230 PRINT_HT_CAP(!(htc->cap & BIT(1)), "HT20"); 231 232 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 0, "Static SM Power Save"); 233 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 1, "Dynamic SM Power Save"); 234 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 3, "SM Power Save disabled"); 235 236 PRINT_HT_CAP((htc->cap & BIT(4)), "RX Greenfield"); 237 PRINT_HT_CAP((htc->cap & BIT(5)), "RX HT20 SGI"); 238 PRINT_HT_CAP((htc->cap & BIT(6)), "RX HT40 SGI"); 239 PRINT_HT_CAP((htc->cap & BIT(7)), "TX STBC"); 240 241 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 0, "No RX STBC"); 242 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 1, "RX STBC 1-stream"); 243 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 2, "RX STBC 2-streams"); 244 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 3, "RX STBC 3-streams"); 245 246 PRINT_HT_CAP((htc->cap & BIT(10)), "HT Delayed Block Ack"); 247 248 PRINT_HT_CAP(!(htc->cap & BIT(11)), "Max AMSDU length: " 249 "3839 bytes"); 250 PRINT_HT_CAP((htc->cap & BIT(11)), "Max AMSDU length: " 251 "7935 bytes"); 252 253 /* 254 * For beacons and probe response this would mean the BSS 255 * does or does not allow the usage of DSSS/CCK HT40. 256 * Otherwise it means the STA does or does not use 257 * DSSS/CCK HT40. 258 */ 259 PRINT_HT_CAP((htc->cap & BIT(12)), "DSSS/CCK HT40"); 260 PRINT_HT_CAP(!(htc->cap & BIT(12)), "No DSSS/CCK HT40"); 261 262 /* BIT(13) is reserved */ 263 264 PRINT_HT_CAP((htc->cap & BIT(14)), "40 MHz Intolerant"); 265 266 PRINT_HT_CAP((htc->cap & BIT(15)), "L-SIG TXOP protection"); 267 268 p += scnprintf(p, sizeof(buf)+buf-p, "ampdu factor/density: %d/%d\n", 269 htc->ampdu_factor, htc->ampdu_density); 270 p += scnprintf(p, sizeof(buf)+buf-p, "MCS mask:"); 271 272 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) 273 p += scnprintf(p, sizeof(buf)+buf-p, " %.2x", 274 htc->mcs.rx_mask[i]); 275 p += scnprintf(p, sizeof(buf)+buf-p, "\n"); 276 277 /* If not set this is meaningless */ 278 if (le16_to_cpu(htc->mcs.rx_highest)) { 279 p += scnprintf(p, sizeof(buf)+buf-p, 280 "MCS rx highest: %d Mbps\n", 281 le16_to_cpu(htc->mcs.rx_highest)); 282 } 283 284 p += scnprintf(p, sizeof(buf)+buf-p, "MCS tx params: %x\n", 285 htc->mcs.tx_params); 286 } 287 288 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); 289 } 290 STA_OPS(ht_capa); 291 292 static ssize_t sta_vht_capa_read(struct file *file, char __user *userbuf, 293 size_t count, loff_t *ppos) 294 { 295 char buf[128], *p = buf; 296 struct sta_info *sta = file->private_data; 297 struct ieee80211_sta_vht_cap *vhtc = &sta->sta.vht_cap; 298 299 p += scnprintf(p, sizeof(buf) + buf - p, "VHT %ssupported\n", 300 vhtc->vht_supported ? "" : "not "); 301 if (vhtc->vht_supported) { 302 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.8x\n", vhtc->cap); 303 304 p += scnprintf(p, sizeof(buf)+buf-p, "RX MCS: %.4x\n", 305 le16_to_cpu(vhtc->vht_mcs.rx_mcs_map)); 306 if (vhtc->vht_mcs.rx_highest) 307 p += scnprintf(p, sizeof(buf)+buf-p, 308 "MCS RX highest: %d Mbps\n", 309 le16_to_cpu(vhtc->vht_mcs.rx_highest)); 310 p += scnprintf(p, sizeof(buf)+buf-p, "TX MCS: %.4x\n", 311 le16_to_cpu(vhtc->vht_mcs.tx_mcs_map)); 312 if (vhtc->vht_mcs.tx_highest) 313 p += scnprintf(p, sizeof(buf)+buf-p, 314 "MCS TX highest: %d Mbps\n", 315 le16_to_cpu(vhtc->vht_mcs.tx_highest)); 316 } 317 318 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); 319 } 320 STA_OPS(vht_capa); 321 322 323 #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 ieee80211_local *local = sta->local; 338 struct ieee80211_sub_if_data *sdata = sta->sdata; 339 struct dentry *stations_dir = sta->sdata->debugfs.subdir_stations; 340 u8 mac[3*ETH_ALEN]; 341 342 sta->debugfs.add_has_run = true; 343 344 if (!stations_dir) 345 return; 346 347 snprintf(mac, sizeof(mac), "%pM", sta->sta.addr); 348 349 /* 350 * This might fail due to a race condition: 351 * When mac80211 unlinks a station, the debugfs entries 352 * remain, but it is already possible to link a new 353 * station with the same address which triggers adding 354 * it to debugfs; therefore, if the old station isn't 355 * destroyed quickly enough the old station's debugfs 356 * dir might still be around. 357 */ 358 sta->debugfs.dir = debugfs_create_dir(mac, stations_dir); 359 if (!sta->debugfs.dir) 360 return; 361 362 DEBUGFS_ADD(flags); 363 DEBUGFS_ADD(num_ps_buf_frames); 364 DEBUGFS_ADD(last_seq_ctrl); 365 DEBUGFS_ADD(agg_status); 366 DEBUGFS_ADD(ht_capa); 367 DEBUGFS_ADD(vht_capa); 368 369 DEBUGFS_ADD_COUNTER(rx_duplicates, rx_stats.num_duplicates); 370 DEBUGFS_ADD_COUNTER(rx_fragments, rx_stats.fragments); 371 DEBUGFS_ADD_COUNTER(tx_filtered, status_stats.filtered); 372 373 if (sizeof(sta->driver_buffered_tids) == sizeof(u32)) 374 debugfs_create_x32("driver_buffered_tids", 0400, 375 sta->debugfs.dir, 376 (u32 *)&sta->driver_buffered_tids); 377 else 378 debugfs_create_x64("driver_buffered_tids", 0400, 379 sta->debugfs.dir, 380 (u64 *)&sta->driver_buffered_tids); 381 382 drv_sta_add_debugfs(local, sdata, &sta->sta, sta->debugfs.dir); 383 } 384 385 void ieee80211_sta_debugfs_remove(struct sta_info *sta) 386 { 387 struct ieee80211_local *local = sta->local; 388 struct ieee80211_sub_if_data *sdata = sta->sdata; 389 390 drv_sta_remove_debugfs(local, sdata, &sta->sta, sta->debugfs.dir); 391 debugfs_remove_recursive(sta->debugfs.dir); 392 sta->debugfs.dir = NULL; 393 } 394