1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * mac80211 debugfs for wireless PHYs 4 * 5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> 6 * Copyright 2013-2014 Intel Mobile Communications GmbH 7 * Copyright (C) 2018 - 2019 Intel Corporation 8 */ 9 10 #include <linux/debugfs.h> 11 #include <linux/rtnetlink.h> 12 #include <linux/vmalloc.h> 13 #include "ieee80211_i.h" 14 #include "driver-ops.h" 15 #include "rate.h" 16 #include "debugfs.h" 17 18 #define DEBUGFS_FORMAT_BUFFER_SIZE 100 19 20 int mac80211_format_buffer(char __user *userbuf, size_t count, 21 loff_t *ppos, char *fmt, ...) 22 { 23 va_list args; 24 char buf[DEBUGFS_FORMAT_BUFFER_SIZE]; 25 int res; 26 27 va_start(args, fmt); 28 res = vscnprintf(buf, sizeof(buf), fmt, args); 29 va_end(args); 30 31 return simple_read_from_buffer(userbuf, count, ppos, buf, res); 32 } 33 34 #define DEBUGFS_READONLY_FILE_FN(name, fmt, value...) \ 35 static ssize_t name## _read(struct file *file, char __user *userbuf, \ 36 size_t count, loff_t *ppos) \ 37 { \ 38 struct ieee80211_local *local = file->private_data; \ 39 \ 40 return mac80211_format_buffer(userbuf, count, ppos, \ 41 fmt "\n", ##value); \ 42 } 43 44 #define DEBUGFS_READONLY_FILE_OPS(name) \ 45 static const struct file_operations name## _ops = { \ 46 .read = name## _read, \ 47 .open = simple_open, \ 48 .llseek = generic_file_llseek, \ 49 }; 50 51 #define DEBUGFS_READONLY_FILE(name, fmt, value...) \ 52 DEBUGFS_READONLY_FILE_FN(name, fmt, value) \ 53 DEBUGFS_READONLY_FILE_OPS(name) 54 55 #define DEBUGFS_ADD(name) \ 56 debugfs_create_file(#name, 0400, phyd, local, &name## _ops); 57 58 #define DEBUGFS_ADD_MODE(name, mode) \ 59 debugfs_create_file(#name, mode, phyd, local, &name## _ops); 60 61 62 DEBUGFS_READONLY_FILE(user_power, "%d", 63 local->user_power_level); 64 DEBUGFS_READONLY_FILE(power, "%d", 65 local->hw.conf.power_level); 66 DEBUGFS_READONLY_FILE(total_ps_buffered, "%d", 67 local->total_ps_buffered); 68 DEBUGFS_READONLY_FILE(wep_iv, "%#08x", 69 local->wep_iv & 0xffffff); 70 DEBUGFS_READONLY_FILE(rate_ctrl_alg, "%s", 71 local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver"); 72 73 static ssize_t aqm_read(struct file *file, 74 char __user *user_buf, 75 size_t count, 76 loff_t *ppos) 77 { 78 struct ieee80211_local *local = file->private_data; 79 struct fq *fq = &local->fq; 80 char buf[200]; 81 int len = 0; 82 83 spin_lock_bh(&local->fq.lock); 84 rcu_read_lock(); 85 86 len = scnprintf(buf, sizeof(buf), 87 "access name value\n" 88 "R fq_flows_cnt %u\n" 89 "R fq_backlog %u\n" 90 "R fq_overlimit %u\n" 91 "R fq_overmemory %u\n" 92 "R fq_collisions %u\n" 93 "R fq_memory_usage %u\n" 94 "RW fq_memory_limit %u\n" 95 "RW fq_limit %u\n" 96 "RW fq_quantum %u\n", 97 fq->flows_cnt, 98 fq->backlog, 99 fq->overmemory, 100 fq->overlimit, 101 fq->collisions, 102 fq->memory_usage, 103 fq->memory_limit, 104 fq->limit, 105 fq->quantum); 106 107 rcu_read_unlock(); 108 spin_unlock_bh(&local->fq.lock); 109 110 return simple_read_from_buffer(user_buf, count, ppos, 111 buf, len); 112 } 113 114 static ssize_t aqm_write(struct file *file, 115 const char __user *user_buf, 116 size_t count, 117 loff_t *ppos) 118 { 119 struct ieee80211_local *local = file->private_data; 120 char buf[100]; 121 size_t len; 122 123 if (count > sizeof(buf)) 124 return -EINVAL; 125 126 if (copy_from_user(buf, user_buf, count)) 127 return -EFAULT; 128 129 buf[sizeof(buf) - 1] = '\0'; 130 len = strlen(buf); 131 if (len > 0 && buf[len-1] == '\n') 132 buf[len-1] = 0; 133 134 if (sscanf(buf, "fq_limit %u", &local->fq.limit) == 1) 135 return count; 136 else if (sscanf(buf, "fq_memory_limit %u", &local->fq.memory_limit) == 1) 137 return count; 138 else if (sscanf(buf, "fq_quantum %u", &local->fq.quantum) == 1) 139 return count; 140 141 return -EINVAL; 142 } 143 144 static const struct file_operations aqm_ops = { 145 .write = aqm_write, 146 .read = aqm_read, 147 .open = simple_open, 148 .llseek = default_llseek, 149 }; 150 151 static ssize_t force_tx_status_read(struct file *file, 152 char __user *user_buf, 153 size_t count, 154 loff_t *ppos) 155 { 156 struct ieee80211_local *local = file->private_data; 157 char buf[3]; 158 int len = 0; 159 160 len = scnprintf(buf, sizeof(buf), "%d\n", (int)local->force_tx_status); 161 162 return simple_read_from_buffer(user_buf, count, ppos, 163 buf, len); 164 } 165 166 static ssize_t force_tx_status_write(struct file *file, 167 const char __user *user_buf, 168 size_t count, 169 loff_t *ppos) 170 { 171 struct ieee80211_local *local = file->private_data; 172 char buf[3]; 173 size_t len; 174 175 if (count > sizeof(buf)) 176 return -EINVAL; 177 178 if (copy_from_user(buf, user_buf, count)) 179 return -EFAULT; 180 181 buf[sizeof(buf) - 1] = '\0'; 182 len = strlen(buf); 183 if (len > 0 && buf[len - 1] == '\n') 184 buf[len - 1] = 0; 185 186 if (buf[0] == '0' && buf[1] == '\0') 187 local->force_tx_status = 0; 188 else if (buf[0] == '1' && buf[1] == '\0') 189 local->force_tx_status = 1; 190 else 191 return -EINVAL; 192 193 return count; 194 } 195 196 static const struct file_operations force_tx_status_ops = { 197 .write = force_tx_status_write, 198 .read = force_tx_status_read, 199 .open = simple_open, 200 .llseek = default_llseek, 201 }; 202 203 #ifdef CONFIG_PM 204 static ssize_t reset_write(struct file *file, const char __user *user_buf, 205 size_t count, loff_t *ppos) 206 { 207 struct ieee80211_local *local = file->private_data; 208 209 rtnl_lock(); 210 __ieee80211_suspend(&local->hw, NULL); 211 __ieee80211_resume(&local->hw); 212 rtnl_unlock(); 213 214 return count; 215 } 216 217 static const struct file_operations reset_ops = { 218 .write = reset_write, 219 .open = simple_open, 220 .llseek = noop_llseek, 221 }; 222 #endif 223 224 static const char *hw_flag_names[] = { 225 #define FLAG(F) [IEEE80211_HW_##F] = #F 226 FLAG(HAS_RATE_CONTROL), 227 FLAG(RX_INCLUDES_FCS), 228 FLAG(HOST_BROADCAST_PS_BUFFERING), 229 FLAG(SIGNAL_UNSPEC), 230 FLAG(SIGNAL_DBM), 231 FLAG(NEED_DTIM_BEFORE_ASSOC), 232 FLAG(SPECTRUM_MGMT), 233 FLAG(AMPDU_AGGREGATION), 234 FLAG(SUPPORTS_PS), 235 FLAG(PS_NULLFUNC_STACK), 236 FLAG(SUPPORTS_DYNAMIC_PS), 237 FLAG(MFP_CAPABLE), 238 FLAG(WANT_MONITOR_VIF), 239 FLAG(NO_AUTO_VIF), 240 FLAG(SW_CRYPTO_CONTROL), 241 FLAG(SUPPORT_FAST_XMIT), 242 FLAG(REPORTS_TX_ACK_STATUS), 243 FLAG(CONNECTION_MONITOR), 244 FLAG(QUEUE_CONTROL), 245 FLAG(SUPPORTS_PER_STA_GTK), 246 FLAG(AP_LINK_PS), 247 FLAG(TX_AMPDU_SETUP_IN_HW), 248 FLAG(SUPPORTS_RC_TABLE), 249 FLAG(P2P_DEV_ADDR_FOR_INTF), 250 FLAG(TIMING_BEACON_ONLY), 251 FLAG(SUPPORTS_HT_CCK_RATES), 252 FLAG(CHANCTX_STA_CSA), 253 FLAG(SUPPORTS_CLONED_SKBS), 254 FLAG(SINGLE_SCAN_ON_ALL_BANDS), 255 FLAG(TDLS_WIDER_BW), 256 FLAG(SUPPORTS_AMSDU_IN_AMPDU), 257 FLAG(BEACON_TX_STATUS), 258 FLAG(NEEDS_UNIQUE_STA_ADDR), 259 FLAG(SUPPORTS_REORDERING_BUFFER), 260 FLAG(USES_RSS), 261 FLAG(TX_AMSDU), 262 FLAG(TX_FRAG_LIST), 263 FLAG(REPORTS_LOW_ACK), 264 FLAG(SUPPORTS_TX_FRAG), 265 FLAG(SUPPORTS_TDLS_BUFFER_STA), 266 FLAG(DEAUTH_NEED_MGD_TX_PREP), 267 FLAG(DOESNT_SUPPORT_QOS_NDP), 268 FLAG(BUFF_MMPDU_TXQ), 269 FLAG(SUPPORTS_VHT_EXT_NSS_BW), 270 FLAG(STA_MMPDU_TXQ), 271 FLAG(TX_STATUS_NO_AMPDU_LEN), 272 FLAG(SUPPORTS_MULTI_BSSID), 273 FLAG(SUPPORTS_ONLY_HE_MULTI_BSSID), 274 FLAG(EXT_KEY_ID_NATIVE), 275 #undef FLAG 276 }; 277 278 static ssize_t hwflags_read(struct file *file, char __user *user_buf, 279 size_t count, loff_t *ppos) 280 { 281 struct ieee80211_local *local = file->private_data; 282 size_t bufsz = 30 * NUM_IEEE80211_HW_FLAGS; 283 char *buf = kzalloc(bufsz, GFP_KERNEL); 284 char *pos = buf, *end = buf + bufsz - 1; 285 ssize_t rv; 286 int i; 287 288 if (!buf) 289 return -ENOMEM; 290 291 /* fail compilation if somebody adds or removes 292 * a flag without updating the name array above 293 */ 294 BUILD_BUG_ON(ARRAY_SIZE(hw_flag_names) != NUM_IEEE80211_HW_FLAGS); 295 296 for (i = 0; i < NUM_IEEE80211_HW_FLAGS; i++) { 297 if (test_bit(i, local->hw.flags)) 298 pos += scnprintf(pos, end - pos, "%s\n", 299 hw_flag_names[i]); 300 } 301 302 rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf)); 303 kfree(buf); 304 return rv; 305 } 306 307 static ssize_t misc_read(struct file *file, char __user *user_buf, 308 size_t count, loff_t *ppos) 309 { 310 struct ieee80211_local *local = file->private_data; 311 /* Max len of each line is 16 characters, plus 9 for 'pending:\n' */ 312 size_t bufsz = IEEE80211_MAX_QUEUES * 16 + 9; 313 char *buf; 314 char *pos, *end; 315 ssize_t rv; 316 int i; 317 int ln; 318 319 buf = kzalloc(bufsz, GFP_KERNEL); 320 if (!buf) 321 return -ENOMEM; 322 323 pos = buf; 324 end = buf + bufsz - 1; 325 326 pos += scnprintf(pos, end - pos, "pending:\n"); 327 328 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 329 ln = skb_queue_len(&local->pending[i]); 330 pos += scnprintf(pos, end - pos, "[%i] %d\n", 331 i, ln); 332 } 333 334 rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf)); 335 kfree(buf); 336 return rv; 337 } 338 339 static ssize_t queues_read(struct file *file, char __user *user_buf, 340 size_t count, loff_t *ppos) 341 { 342 struct ieee80211_local *local = file->private_data; 343 unsigned long flags; 344 char buf[IEEE80211_MAX_QUEUES * 20]; 345 int q, res = 0; 346 347 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 348 for (q = 0; q < local->hw.queues; q++) 349 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q, 350 local->queue_stop_reasons[q], 351 skb_queue_len(&local->pending[q])); 352 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 353 354 return simple_read_from_buffer(user_buf, count, ppos, buf, res); 355 } 356 357 DEBUGFS_READONLY_FILE_OPS(hwflags); 358 DEBUGFS_READONLY_FILE_OPS(queues); 359 DEBUGFS_READONLY_FILE_OPS(misc); 360 361 /* statistics stuff */ 362 363 static ssize_t format_devstat_counter(struct ieee80211_local *local, 364 char __user *userbuf, 365 size_t count, loff_t *ppos, 366 int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf, 367 int buflen)) 368 { 369 struct ieee80211_low_level_stats stats; 370 char buf[20]; 371 int res; 372 373 rtnl_lock(); 374 res = drv_get_stats(local, &stats); 375 rtnl_unlock(); 376 if (res) 377 return res; 378 res = printvalue(&stats, buf, sizeof(buf)); 379 return simple_read_from_buffer(userbuf, count, ppos, buf, res); 380 } 381 382 #define DEBUGFS_DEVSTATS_FILE(name) \ 383 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\ 384 char *buf, int buflen) \ 385 { \ 386 return scnprintf(buf, buflen, "%u\n", stats->name); \ 387 } \ 388 static ssize_t stats_ ##name## _read(struct file *file, \ 389 char __user *userbuf, \ 390 size_t count, loff_t *ppos) \ 391 { \ 392 return format_devstat_counter(file->private_data, \ 393 userbuf, \ 394 count, \ 395 ppos, \ 396 print_devstats_##name); \ 397 } \ 398 \ 399 static const struct file_operations stats_ ##name## _ops = { \ 400 .read = stats_ ##name## _read, \ 401 .open = simple_open, \ 402 .llseek = generic_file_llseek, \ 403 }; 404 405 #define DEBUGFS_STATS_ADD(name) \ 406 debugfs_create_u32(#name, 0400, statsd, &local->name); 407 #define DEBUGFS_DEVSTATS_ADD(name) \ 408 debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops); 409 410 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount); 411 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount); 412 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount); 413 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount); 414 415 void debugfs_hw_add(struct ieee80211_local *local) 416 { 417 struct dentry *phyd = local->hw.wiphy->debugfsdir; 418 struct dentry *statsd; 419 420 if (!phyd) 421 return; 422 423 local->debugfs.keys = debugfs_create_dir("keys", phyd); 424 425 DEBUGFS_ADD(total_ps_buffered); 426 DEBUGFS_ADD(wep_iv); 427 DEBUGFS_ADD(rate_ctrl_alg); 428 DEBUGFS_ADD(queues); 429 DEBUGFS_ADD(misc); 430 #ifdef CONFIG_PM 431 DEBUGFS_ADD_MODE(reset, 0200); 432 #endif 433 DEBUGFS_ADD(hwflags); 434 DEBUGFS_ADD(user_power); 435 DEBUGFS_ADD(power); 436 DEBUGFS_ADD_MODE(force_tx_status, 0600); 437 438 if (local->ops->wake_tx_queue) 439 DEBUGFS_ADD_MODE(aqm, 0600); 440 441 debugfs_create_u16("airtime_flags", 0600, 442 phyd, &local->airtime_flags); 443 444 statsd = debugfs_create_dir("statistics", phyd); 445 446 /* if the dir failed, don't put all the other things into the root! */ 447 if (!statsd) 448 return; 449 450 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS 451 DEBUGFS_STATS_ADD(dot11TransmittedFragmentCount); 452 DEBUGFS_STATS_ADD(dot11MulticastTransmittedFrameCount); 453 DEBUGFS_STATS_ADD(dot11FailedCount); 454 DEBUGFS_STATS_ADD(dot11RetryCount); 455 DEBUGFS_STATS_ADD(dot11MultipleRetryCount); 456 DEBUGFS_STATS_ADD(dot11FrameDuplicateCount); 457 DEBUGFS_STATS_ADD(dot11ReceivedFragmentCount); 458 DEBUGFS_STATS_ADD(dot11MulticastReceivedFrameCount); 459 DEBUGFS_STATS_ADD(dot11TransmittedFrameCount); 460 DEBUGFS_STATS_ADD(tx_handlers_drop); 461 DEBUGFS_STATS_ADD(tx_handlers_queued); 462 DEBUGFS_STATS_ADD(tx_handlers_drop_wep); 463 DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc); 464 DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port); 465 DEBUGFS_STATS_ADD(rx_handlers_drop); 466 DEBUGFS_STATS_ADD(rx_handlers_queued); 467 DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc); 468 DEBUGFS_STATS_ADD(rx_handlers_drop_defrag); 469 DEBUGFS_STATS_ADD(tx_expand_skb_head); 470 DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned); 471 DEBUGFS_STATS_ADD(rx_expand_skb_head_defrag); 472 DEBUGFS_STATS_ADD(rx_handlers_fragments); 473 DEBUGFS_STATS_ADD(tx_status_drop); 474 #endif 475 DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount); 476 DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount); 477 DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount); 478 DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount); 479 } 480