1 /* 2 * mac80211 debugfs for wireless PHYs 3 * 4 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> 5 * Copyright 2013-2014 Intel Mobile Communications GmbH 6 * Copyright (C) 2018 Intel Corporation 7 * 8 * GPLv2 9 * 10 */ 11 12 #include <linux/debugfs.h> 13 #include <linux/rtnetlink.h> 14 #include <linux/vmalloc.h> 15 #include "ieee80211_i.h" 16 #include "driver-ops.h" 17 #include "rate.h" 18 #include "debugfs.h" 19 20 #define DEBUGFS_FORMAT_BUFFER_SIZE 100 21 22 int mac80211_format_buffer(char __user *userbuf, size_t count, 23 loff_t *ppos, char *fmt, ...) 24 { 25 va_list args; 26 char buf[DEBUGFS_FORMAT_BUFFER_SIZE]; 27 int res; 28 29 va_start(args, fmt); 30 res = vscnprintf(buf, sizeof(buf), fmt, args); 31 va_end(args); 32 33 return simple_read_from_buffer(userbuf, count, ppos, buf, res); 34 } 35 36 #define DEBUGFS_READONLY_FILE_FN(name, fmt, value...) \ 37 static ssize_t name## _read(struct file *file, char __user *userbuf, \ 38 size_t count, loff_t *ppos) \ 39 { \ 40 struct ieee80211_local *local = file->private_data; \ 41 \ 42 return mac80211_format_buffer(userbuf, count, ppos, \ 43 fmt "\n", ##value); \ 44 } 45 46 #define DEBUGFS_READONLY_FILE_OPS(name) \ 47 static const struct file_operations name## _ops = { \ 48 .read = name## _read, \ 49 .open = simple_open, \ 50 .llseek = generic_file_llseek, \ 51 }; 52 53 #define DEBUGFS_READONLY_FILE(name, fmt, value...) \ 54 DEBUGFS_READONLY_FILE_FN(name, fmt, value) \ 55 DEBUGFS_READONLY_FILE_OPS(name) 56 57 #define DEBUGFS_ADD(name) \ 58 debugfs_create_file(#name, 0400, phyd, local, &name## _ops); 59 60 #define DEBUGFS_ADD_MODE(name, mode) \ 61 debugfs_create_file(#name, mode, phyd, local, &name## _ops); 62 63 64 DEBUGFS_READONLY_FILE(user_power, "%d", 65 local->user_power_level); 66 DEBUGFS_READONLY_FILE(power, "%d", 67 local->hw.conf.power_level); 68 DEBUGFS_READONLY_FILE(total_ps_buffered, "%d", 69 local->total_ps_buffered); 70 DEBUGFS_READONLY_FILE(wep_iv, "%#08x", 71 local->wep_iv & 0xffffff); 72 DEBUGFS_READONLY_FILE(rate_ctrl_alg, "%s", 73 local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver"); 74 75 static ssize_t aqm_read(struct file *file, 76 char __user *user_buf, 77 size_t count, 78 loff_t *ppos) 79 { 80 struct ieee80211_local *local = file->private_data; 81 struct fq *fq = &local->fq; 82 char buf[200]; 83 int len = 0; 84 85 spin_lock_bh(&local->fq.lock); 86 rcu_read_lock(); 87 88 len = scnprintf(buf, sizeof(buf), 89 "access name value\n" 90 "R fq_flows_cnt %u\n" 91 "R fq_backlog %u\n" 92 "R fq_overlimit %u\n" 93 "R fq_overmemory %u\n" 94 "R fq_collisions %u\n" 95 "R fq_memory_usage %u\n" 96 "RW fq_memory_limit %u\n" 97 "RW fq_limit %u\n" 98 "RW fq_quantum %u\n", 99 fq->flows_cnt, 100 fq->backlog, 101 fq->overmemory, 102 fq->overlimit, 103 fq->collisions, 104 fq->memory_usage, 105 fq->memory_limit, 106 fq->limit, 107 fq->quantum); 108 109 rcu_read_unlock(); 110 spin_unlock_bh(&local->fq.lock); 111 112 return simple_read_from_buffer(user_buf, count, ppos, 113 buf, len); 114 } 115 116 static ssize_t aqm_write(struct file *file, 117 const char __user *user_buf, 118 size_t count, 119 loff_t *ppos) 120 { 121 struct ieee80211_local *local = file->private_data; 122 char buf[100]; 123 size_t len; 124 125 if (count > sizeof(buf)) 126 return -EINVAL; 127 128 if (copy_from_user(buf, user_buf, count)) 129 return -EFAULT; 130 131 buf[sizeof(buf) - 1] = '\0'; 132 len = strlen(buf); 133 if (len > 0 && buf[len-1] == '\n') 134 buf[len-1] = 0; 135 136 if (sscanf(buf, "fq_limit %u", &local->fq.limit) == 1) 137 return count; 138 else if (sscanf(buf, "fq_memory_limit %u", &local->fq.memory_limit) == 1) 139 return count; 140 else if (sscanf(buf, "fq_quantum %u", &local->fq.quantum) == 1) 141 return count; 142 143 return -EINVAL; 144 } 145 146 static const struct file_operations aqm_ops = { 147 .write = aqm_write, 148 .read = aqm_read, 149 .open = simple_open, 150 .llseek = default_llseek, 151 }; 152 153 #ifdef CONFIG_PM 154 static ssize_t reset_write(struct file *file, const char __user *user_buf, 155 size_t count, loff_t *ppos) 156 { 157 struct ieee80211_local *local = file->private_data; 158 159 rtnl_lock(); 160 __ieee80211_suspend(&local->hw, NULL); 161 __ieee80211_resume(&local->hw); 162 rtnl_unlock(); 163 164 return count; 165 } 166 167 static const struct file_operations reset_ops = { 168 .write = reset_write, 169 .open = simple_open, 170 .llseek = noop_llseek, 171 }; 172 #endif 173 174 static const char *hw_flag_names[] = { 175 #define FLAG(F) [IEEE80211_HW_##F] = #F 176 FLAG(HAS_RATE_CONTROL), 177 FLAG(RX_INCLUDES_FCS), 178 FLAG(HOST_BROADCAST_PS_BUFFERING), 179 FLAG(SIGNAL_UNSPEC), 180 FLAG(SIGNAL_DBM), 181 FLAG(NEED_DTIM_BEFORE_ASSOC), 182 FLAG(SPECTRUM_MGMT), 183 FLAG(AMPDU_AGGREGATION), 184 FLAG(SUPPORTS_PS), 185 FLAG(PS_NULLFUNC_STACK), 186 FLAG(SUPPORTS_DYNAMIC_PS), 187 FLAG(MFP_CAPABLE), 188 FLAG(WANT_MONITOR_VIF), 189 FLAG(NO_AUTO_VIF), 190 FLAG(SW_CRYPTO_CONTROL), 191 FLAG(SUPPORT_FAST_XMIT), 192 FLAG(REPORTS_TX_ACK_STATUS), 193 FLAG(CONNECTION_MONITOR), 194 FLAG(QUEUE_CONTROL), 195 FLAG(SUPPORTS_PER_STA_GTK), 196 FLAG(AP_LINK_PS), 197 FLAG(TX_AMPDU_SETUP_IN_HW), 198 FLAG(SUPPORTS_RC_TABLE), 199 FLAG(P2P_DEV_ADDR_FOR_INTF), 200 FLAG(TIMING_BEACON_ONLY), 201 FLAG(SUPPORTS_HT_CCK_RATES), 202 FLAG(CHANCTX_STA_CSA), 203 FLAG(SUPPORTS_CLONED_SKBS), 204 FLAG(SINGLE_SCAN_ON_ALL_BANDS), 205 FLAG(TDLS_WIDER_BW), 206 FLAG(SUPPORTS_AMSDU_IN_AMPDU), 207 FLAG(BEACON_TX_STATUS), 208 FLAG(NEEDS_UNIQUE_STA_ADDR), 209 FLAG(SUPPORTS_REORDERING_BUFFER), 210 FLAG(USES_RSS), 211 FLAG(TX_AMSDU), 212 FLAG(TX_FRAG_LIST), 213 FLAG(REPORTS_LOW_ACK), 214 FLAG(SUPPORTS_TX_FRAG), 215 FLAG(SUPPORTS_TDLS_BUFFER_STA), 216 FLAG(DEAUTH_NEED_MGD_TX_PREP), 217 FLAG(DOESNT_SUPPORT_QOS_NDP), 218 FLAG(BUFF_MMPDU_TXQ), 219 FLAG(SUPPORTS_VHT_EXT_NSS_BW), 220 FLAG(STA_MMPDU_TXQ), 221 #undef FLAG 222 }; 223 224 static ssize_t hwflags_read(struct file *file, char __user *user_buf, 225 size_t count, loff_t *ppos) 226 { 227 struct ieee80211_local *local = file->private_data; 228 size_t bufsz = 30 * NUM_IEEE80211_HW_FLAGS; 229 char *buf = kzalloc(bufsz, GFP_KERNEL); 230 char *pos = buf, *end = buf + bufsz - 1; 231 ssize_t rv; 232 int i; 233 234 if (!buf) 235 return -ENOMEM; 236 237 /* fail compilation if somebody adds or removes 238 * a flag without updating the name array above 239 */ 240 BUILD_BUG_ON(ARRAY_SIZE(hw_flag_names) != NUM_IEEE80211_HW_FLAGS); 241 242 for (i = 0; i < NUM_IEEE80211_HW_FLAGS; i++) { 243 if (test_bit(i, local->hw.flags)) 244 pos += scnprintf(pos, end - pos, "%s\n", 245 hw_flag_names[i]); 246 } 247 248 rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf)); 249 kfree(buf); 250 return rv; 251 } 252 253 static ssize_t misc_read(struct file *file, char __user *user_buf, 254 size_t count, loff_t *ppos) 255 { 256 struct ieee80211_local *local = file->private_data; 257 /* Max len of each line is 16 characters, plus 9 for 'pending:\n' */ 258 size_t bufsz = IEEE80211_MAX_QUEUES * 16 + 9; 259 char *buf; 260 char *pos, *end; 261 ssize_t rv; 262 int i; 263 int ln; 264 265 buf = kzalloc(bufsz, GFP_KERNEL); 266 if (!buf) 267 return -ENOMEM; 268 269 pos = buf; 270 end = buf + bufsz - 1; 271 272 pos += scnprintf(pos, end - pos, "pending:\n"); 273 274 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 275 ln = skb_queue_len(&local->pending[i]); 276 pos += scnprintf(pos, end - pos, "[%i] %d\n", 277 i, ln); 278 } 279 280 rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf)); 281 kfree(buf); 282 return rv; 283 } 284 285 static ssize_t queues_read(struct file *file, char __user *user_buf, 286 size_t count, loff_t *ppos) 287 { 288 struct ieee80211_local *local = file->private_data; 289 unsigned long flags; 290 char buf[IEEE80211_MAX_QUEUES * 20]; 291 int q, res = 0; 292 293 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 294 for (q = 0; q < local->hw.queues; q++) 295 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q, 296 local->queue_stop_reasons[q], 297 skb_queue_len(&local->pending[q])); 298 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 299 300 return simple_read_from_buffer(user_buf, count, ppos, buf, res); 301 } 302 303 DEBUGFS_READONLY_FILE_OPS(hwflags); 304 DEBUGFS_READONLY_FILE_OPS(queues); 305 DEBUGFS_READONLY_FILE_OPS(misc); 306 307 /* statistics stuff */ 308 309 static ssize_t format_devstat_counter(struct ieee80211_local *local, 310 char __user *userbuf, 311 size_t count, loff_t *ppos, 312 int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf, 313 int buflen)) 314 { 315 struct ieee80211_low_level_stats stats; 316 char buf[20]; 317 int res; 318 319 rtnl_lock(); 320 res = drv_get_stats(local, &stats); 321 rtnl_unlock(); 322 if (res) 323 return res; 324 res = printvalue(&stats, buf, sizeof(buf)); 325 return simple_read_from_buffer(userbuf, count, ppos, buf, res); 326 } 327 328 #define DEBUGFS_DEVSTATS_FILE(name) \ 329 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\ 330 char *buf, int buflen) \ 331 { \ 332 return scnprintf(buf, buflen, "%u\n", stats->name); \ 333 } \ 334 static ssize_t stats_ ##name## _read(struct file *file, \ 335 char __user *userbuf, \ 336 size_t count, loff_t *ppos) \ 337 { \ 338 return format_devstat_counter(file->private_data, \ 339 userbuf, \ 340 count, \ 341 ppos, \ 342 print_devstats_##name); \ 343 } \ 344 \ 345 static const struct file_operations stats_ ##name## _ops = { \ 346 .read = stats_ ##name## _read, \ 347 .open = simple_open, \ 348 .llseek = generic_file_llseek, \ 349 }; 350 351 #define DEBUGFS_STATS_ADD(name) \ 352 debugfs_create_u32(#name, 0400, statsd, &local->name); 353 #define DEBUGFS_DEVSTATS_ADD(name) \ 354 debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops); 355 356 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount); 357 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount); 358 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount); 359 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount); 360 361 void debugfs_hw_add(struct ieee80211_local *local) 362 { 363 struct dentry *phyd = local->hw.wiphy->debugfsdir; 364 struct dentry *statsd; 365 366 if (!phyd) 367 return; 368 369 local->debugfs.keys = debugfs_create_dir("keys", phyd); 370 371 DEBUGFS_ADD(total_ps_buffered); 372 DEBUGFS_ADD(wep_iv); 373 DEBUGFS_ADD(rate_ctrl_alg); 374 DEBUGFS_ADD(queues); 375 DEBUGFS_ADD(misc); 376 #ifdef CONFIG_PM 377 DEBUGFS_ADD_MODE(reset, 0200); 378 #endif 379 DEBUGFS_ADD(hwflags); 380 DEBUGFS_ADD(user_power); 381 DEBUGFS_ADD(power); 382 383 if (local->ops->wake_tx_queue) 384 DEBUGFS_ADD_MODE(aqm, 0600); 385 386 statsd = debugfs_create_dir("statistics", phyd); 387 388 /* if the dir failed, don't put all the other things into the root! */ 389 if (!statsd) 390 return; 391 392 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS 393 DEBUGFS_STATS_ADD(dot11TransmittedFragmentCount); 394 DEBUGFS_STATS_ADD(dot11MulticastTransmittedFrameCount); 395 DEBUGFS_STATS_ADD(dot11FailedCount); 396 DEBUGFS_STATS_ADD(dot11RetryCount); 397 DEBUGFS_STATS_ADD(dot11MultipleRetryCount); 398 DEBUGFS_STATS_ADD(dot11FrameDuplicateCount); 399 DEBUGFS_STATS_ADD(dot11ReceivedFragmentCount); 400 DEBUGFS_STATS_ADD(dot11MulticastReceivedFrameCount); 401 DEBUGFS_STATS_ADD(dot11TransmittedFrameCount); 402 DEBUGFS_STATS_ADD(tx_handlers_drop); 403 DEBUGFS_STATS_ADD(tx_handlers_queued); 404 DEBUGFS_STATS_ADD(tx_handlers_drop_wep); 405 DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc); 406 DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port); 407 DEBUGFS_STATS_ADD(rx_handlers_drop); 408 DEBUGFS_STATS_ADD(rx_handlers_queued); 409 DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc); 410 DEBUGFS_STATS_ADD(rx_handlers_drop_defrag); 411 DEBUGFS_STATS_ADD(tx_expand_skb_head); 412 DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned); 413 DEBUGFS_STATS_ADD(rx_expand_skb_head_defrag); 414 DEBUGFS_STATS_ADD(rx_handlers_fragments); 415 DEBUGFS_STATS_ADD(tx_status_drop); 416 #endif 417 DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount); 418 DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount); 419 DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount); 420 DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount); 421 } 422