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 * 7 * GPLv2 8 * 9 */ 10 11 #include <linux/debugfs.h> 12 #include <linux/rtnetlink.h> 13 #include <linux/vmalloc.h> 14 #include "ieee80211_i.h" 15 #include "driver-ops.h" 16 #include "rate.h" 17 #include "debugfs.h" 18 19 #define DEBUGFS_FORMAT_BUFFER_SIZE 100 20 21 int mac80211_format_buffer(char __user *userbuf, size_t count, 22 loff_t *ppos, char *fmt, ...) 23 { 24 va_list args; 25 char buf[DEBUGFS_FORMAT_BUFFER_SIZE]; 26 int res; 27 28 va_start(args, fmt); 29 res = vscnprintf(buf, sizeof(buf), fmt, args); 30 va_end(args); 31 32 return simple_read_from_buffer(userbuf, count, ppos, buf, res); 33 } 34 35 #define DEBUGFS_READONLY_FILE_FN(name, fmt, value...) \ 36 static ssize_t name## _read(struct file *file, char __user *userbuf, \ 37 size_t count, loff_t *ppos) \ 38 { \ 39 struct ieee80211_local *local = file->private_data; \ 40 \ 41 return mac80211_format_buffer(userbuf, count, ppos, \ 42 fmt "\n", ##value); \ 43 } 44 45 #define DEBUGFS_READONLY_FILE_OPS(name) \ 46 static const struct file_operations name## _ops = { \ 47 .read = name## _read, \ 48 .open = simple_open, \ 49 .llseek = generic_file_llseek, \ 50 }; 51 52 #define DEBUGFS_READONLY_FILE(name, fmt, value...) \ 53 DEBUGFS_READONLY_FILE_FN(name, fmt, value) \ 54 DEBUGFS_READONLY_FILE_OPS(name) 55 56 #define DEBUGFS_ADD(name) \ 57 debugfs_create_file(#name, 0400, phyd, local, &name## _ops); 58 59 #define DEBUGFS_ADD_MODE(name, mode) \ 60 debugfs_create_file(#name, mode, phyd, local, &name## _ops); 61 62 63 DEBUGFS_READONLY_FILE(user_power, "%d", 64 local->user_power_level); 65 DEBUGFS_READONLY_FILE(power, "%d", 66 local->hw.conf.power_level); 67 DEBUGFS_READONLY_FILE(total_ps_buffered, "%d", 68 local->total_ps_buffered); 69 DEBUGFS_READONLY_FILE(wep_iv, "%#08x", 70 local->wep_iv & 0xffffff); 71 DEBUGFS_READONLY_FILE(rate_ctrl_alg, "%s", 72 local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver"); 73 74 struct aqm_info { 75 struct ieee80211_local *local; 76 size_t size; 77 size_t len; 78 unsigned char buf[0]; 79 }; 80 81 #define AQM_HDR_LEN 200 82 #define AQM_HW_ENTRY_LEN 40 83 #define AQM_TXQ_ENTRY_LEN 110 84 85 static int aqm_open(struct inode *inode, struct file *file) 86 { 87 struct ieee80211_local *local = inode->i_private; 88 struct ieee80211_sub_if_data *sdata; 89 struct sta_info *sta; 90 struct txq_info *txqi; 91 struct fq *fq = &local->fq; 92 struct aqm_info *info = NULL; 93 int len = 0; 94 int i; 95 96 if (!local->ops->wake_tx_queue) 97 return -EOPNOTSUPP; 98 99 len += AQM_HDR_LEN; 100 len += 6 * AQM_HW_ENTRY_LEN; 101 102 rcu_read_lock(); 103 list_for_each_entry_rcu(sdata, &local->interfaces, list) 104 len += AQM_TXQ_ENTRY_LEN; 105 list_for_each_entry_rcu(sta, &local->sta_list, list) 106 len += AQM_TXQ_ENTRY_LEN * ARRAY_SIZE(sta->sta.txq); 107 rcu_read_unlock(); 108 109 info = vmalloc(len); 110 if (!info) 111 return -ENOMEM; 112 113 spin_lock_bh(&local->fq.lock); 114 rcu_read_lock(); 115 116 file->private_data = info; 117 info->local = local; 118 info->size = len; 119 len = 0; 120 121 len += scnprintf(info->buf + len, info->size - len, 122 "* hw\n" 123 "access name value\n" 124 "R fq_flows_cnt %u\n" 125 "R fq_backlog %u\n" 126 "R fq_overlimit %u\n" 127 "R fq_collisions %u\n" 128 "RW fq_limit %u\n" 129 "RW fq_quantum %u\n", 130 fq->flows_cnt, 131 fq->backlog, 132 fq->overlimit, 133 fq->collisions, 134 fq->limit, 135 fq->quantum); 136 137 len += scnprintf(info->buf + len, 138 info->size - len, 139 "* vif\n" 140 "ifname addr ac backlog-bytes backlog-packets flows overlimit collisions tx-bytes tx-packets\n"); 141 142 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 143 txqi = to_txq_info(sdata->vif.txq); 144 len += scnprintf(info->buf + len, info->size - len, 145 "%s %pM %u %u %u %u %u %u %u %u\n", 146 sdata->name, 147 sdata->vif.addr, 148 txqi->txq.ac, 149 txqi->tin.backlog_bytes, 150 txqi->tin.backlog_packets, 151 txqi->tin.flows, 152 txqi->tin.overlimit, 153 txqi->tin.collisions, 154 txqi->tin.tx_bytes, 155 txqi->tin.tx_packets); 156 } 157 158 len += scnprintf(info->buf + len, 159 info->size - len, 160 "* sta\n" 161 "ifname addr tid ac backlog-bytes backlog-packets flows overlimit collisions tx-bytes tx-packets\n"); 162 163 list_for_each_entry_rcu(sta, &local->sta_list, list) { 164 sdata = sta->sdata; 165 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) { 166 txqi = to_txq_info(sta->sta.txq[i]); 167 len += scnprintf(info->buf + len, info->size - len, 168 "%s %pM %d %d %u %u %u %u %u %u %u\n", 169 sdata->name, 170 sta->sta.addr, 171 txqi->txq.tid, 172 txqi->txq.ac, 173 txqi->tin.backlog_bytes, 174 txqi->tin.backlog_packets, 175 txqi->tin.flows, 176 txqi->tin.overlimit, 177 txqi->tin.collisions, 178 txqi->tin.tx_bytes, 179 txqi->tin.tx_packets); 180 } 181 } 182 183 info->len = len; 184 185 rcu_read_unlock(); 186 spin_unlock_bh(&local->fq.lock); 187 188 return 0; 189 } 190 191 static int aqm_release(struct inode *inode, struct file *file) 192 { 193 vfree(file->private_data); 194 return 0; 195 } 196 197 static ssize_t aqm_read(struct file *file, 198 char __user *user_buf, 199 size_t count, 200 loff_t *ppos) 201 { 202 struct aqm_info *info = file->private_data; 203 204 return simple_read_from_buffer(user_buf, count, ppos, 205 info->buf, info->len); 206 } 207 208 static ssize_t aqm_write(struct file *file, 209 const char __user *user_buf, 210 size_t count, 211 loff_t *ppos) 212 { 213 struct aqm_info *info = file->private_data; 214 struct ieee80211_local *local = info->local; 215 char buf[100]; 216 size_t len; 217 218 if (count > sizeof(buf)) 219 return -EINVAL; 220 221 if (copy_from_user(buf, user_buf, count)) 222 return -EFAULT; 223 224 buf[sizeof(buf) - 1] = '\0'; 225 len = strlen(buf); 226 if (len > 0 && buf[len-1] == '\n') 227 buf[len-1] = 0; 228 229 if (sscanf(buf, "fq_limit %u", &local->fq.limit) == 1) 230 return count; 231 else if (sscanf(buf, "fq_quantum %u", &local->fq.quantum) == 1) 232 return count; 233 234 return -EINVAL; 235 } 236 237 static const struct file_operations aqm_ops = { 238 .write = aqm_write, 239 .read = aqm_read, 240 .open = aqm_open, 241 .release = aqm_release, 242 .llseek = default_llseek, 243 }; 244 245 #ifdef CONFIG_PM 246 static ssize_t reset_write(struct file *file, const char __user *user_buf, 247 size_t count, loff_t *ppos) 248 { 249 struct ieee80211_local *local = file->private_data; 250 251 rtnl_lock(); 252 __ieee80211_suspend(&local->hw, NULL); 253 __ieee80211_resume(&local->hw); 254 rtnl_unlock(); 255 256 return count; 257 } 258 259 static const struct file_operations reset_ops = { 260 .write = reset_write, 261 .open = simple_open, 262 .llseek = noop_llseek, 263 }; 264 #endif 265 266 static const char *hw_flag_names[] = { 267 #define FLAG(F) [IEEE80211_HW_##F] = #F 268 FLAG(HAS_RATE_CONTROL), 269 FLAG(RX_INCLUDES_FCS), 270 FLAG(HOST_BROADCAST_PS_BUFFERING), 271 FLAG(SIGNAL_UNSPEC), 272 FLAG(SIGNAL_DBM), 273 FLAG(NEED_DTIM_BEFORE_ASSOC), 274 FLAG(SPECTRUM_MGMT), 275 FLAG(AMPDU_AGGREGATION), 276 FLAG(SUPPORTS_PS), 277 FLAG(PS_NULLFUNC_STACK), 278 FLAG(SUPPORTS_DYNAMIC_PS), 279 FLAG(MFP_CAPABLE), 280 FLAG(WANT_MONITOR_VIF), 281 FLAG(NO_AUTO_VIF), 282 FLAG(SW_CRYPTO_CONTROL), 283 FLAG(SUPPORT_FAST_XMIT), 284 FLAG(REPORTS_TX_ACK_STATUS), 285 FLAG(CONNECTION_MONITOR), 286 FLAG(QUEUE_CONTROL), 287 FLAG(SUPPORTS_PER_STA_GTK), 288 FLAG(AP_LINK_PS), 289 FLAG(TX_AMPDU_SETUP_IN_HW), 290 FLAG(SUPPORTS_RC_TABLE), 291 FLAG(P2P_DEV_ADDR_FOR_INTF), 292 FLAG(TIMING_BEACON_ONLY), 293 FLAG(SUPPORTS_HT_CCK_RATES), 294 FLAG(CHANCTX_STA_CSA), 295 FLAG(SUPPORTS_CLONED_SKBS), 296 FLAG(SINGLE_SCAN_ON_ALL_BANDS), 297 FLAG(TDLS_WIDER_BW), 298 FLAG(SUPPORTS_AMSDU_IN_AMPDU), 299 FLAG(BEACON_TX_STATUS), 300 FLAG(NEEDS_UNIQUE_STA_ADDR), 301 FLAG(SUPPORTS_REORDERING_BUFFER), 302 FLAG(USES_RSS), 303 FLAG(TX_AMSDU), 304 FLAG(TX_FRAG_LIST), 305 #undef FLAG 306 }; 307 308 static ssize_t hwflags_read(struct file *file, char __user *user_buf, 309 size_t count, loff_t *ppos) 310 { 311 struct ieee80211_local *local = file->private_data; 312 size_t bufsz = 30 * NUM_IEEE80211_HW_FLAGS; 313 char *buf = kzalloc(bufsz, GFP_KERNEL); 314 char *pos = buf, *end = buf + bufsz - 1; 315 ssize_t rv; 316 int i; 317 318 if (!buf) 319 return -ENOMEM; 320 321 /* fail compilation if somebody adds or removes 322 * a flag without updating the name array above 323 */ 324 BUILD_BUG_ON(ARRAY_SIZE(hw_flag_names) != NUM_IEEE80211_HW_FLAGS); 325 326 for (i = 0; i < NUM_IEEE80211_HW_FLAGS; i++) { 327 if (test_bit(i, local->hw.flags)) 328 pos += scnprintf(pos, end - pos, "%s\n", 329 hw_flag_names[i]); 330 } 331 332 rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf)); 333 kfree(buf); 334 return rv; 335 } 336 337 static ssize_t queues_read(struct file *file, char __user *user_buf, 338 size_t count, loff_t *ppos) 339 { 340 struct ieee80211_local *local = file->private_data; 341 unsigned long flags; 342 char buf[IEEE80211_MAX_QUEUES * 20]; 343 int q, res = 0; 344 345 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 346 for (q = 0; q < local->hw.queues; q++) 347 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q, 348 local->queue_stop_reasons[q], 349 skb_queue_len(&local->pending[q])); 350 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 351 352 return simple_read_from_buffer(user_buf, count, ppos, buf, res); 353 } 354 355 DEBUGFS_READONLY_FILE_OPS(hwflags); 356 DEBUGFS_READONLY_FILE_OPS(queues); 357 358 /* statistics stuff */ 359 360 static ssize_t format_devstat_counter(struct ieee80211_local *local, 361 char __user *userbuf, 362 size_t count, loff_t *ppos, 363 int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf, 364 int buflen)) 365 { 366 struct ieee80211_low_level_stats stats; 367 char buf[20]; 368 int res; 369 370 rtnl_lock(); 371 res = drv_get_stats(local, &stats); 372 rtnl_unlock(); 373 if (res) 374 return res; 375 res = printvalue(&stats, buf, sizeof(buf)); 376 return simple_read_from_buffer(userbuf, count, ppos, buf, res); 377 } 378 379 #define DEBUGFS_DEVSTATS_FILE(name) \ 380 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\ 381 char *buf, int buflen) \ 382 { \ 383 return scnprintf(buf, buflen, "%u\n", stats->name); \ 384 } \ 385 static ssize_t stats_ ##name## _read(struct file *file, \ 386 char __user *userbuf, \ 387 size_t count, loff_t *ppos) \ 388 { \ 389 return format_devstat_counter(file->private_data, \ 390 userbuf, \ 391 count, \ 392 ppos, \ 393 print_devstats_##name); \ 394 } \ 395 \ 396 static const struct file_operations stats_ ##name## _ops = { \ 397 .read = stats_ ##name## _read, \ 398 .open = simple_open, \ 399 .llseek = generic_file_llseek, \ 400 }; 401 402 #define DEBUGFS_STATS_ADD(name) \ 403 debugfs_create_u32(#name, 0400, statsd, &local->name); 404 #define DEBUGFS_DEVSTATS_ADD(name) \ 405 debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops); 406 407 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount); 408 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount); 409 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount); 410 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount); 411 412 void debugfs_hw_add(struct ieee80211_local *local) 413 { 414 struct dentry *phyd = local->hw.wiphy->debugfsdir; 415 struct dentry *statsd; 416 417 if (!phyd) 418 return; 419 420 local->debugfs.keys = debugfs_create_dir("keys", phyd); 421 422 DEBUGFS_ADD(total_ps_buffered); 423 DEBUGFS_ADD(wep_iv); 424 DEBUGFS_ADD(queues); 425 #ifdef CONFIG_PM 426 DEBUGFS_ADD_MODE(reset, 0200); 427 #endif 428 DEBUGFS_ADD(hwflags); 429 DEBUGFS_ADD(user_power); 430 DEBUGFS_ADD(power); 431 DEBUGFS_ADD_MODE(aqm, 0600); 432 433 statsd = debugfs_create_dir("statistics", phyd); 434 435 /* if the dir failed, don't put all the other things into the root! */ 436 if (!statsd) 437 return; 438 439 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS 440 DEBUGFS_STATS_ADD(dot11TransmittedFragmentCount); 441 DEBUGFS_STATS_ADD(dot11MulticastTransmittedFrameCount); 442 DEBUGFS_STATS_ADD(dot11FailedCount); 443 DEBUGFS_STATS_ADD(dot11RetryCount); 444 DEBUGFS_STATS_ADD(dot11MultipleRetryCount); 445 DEBUGFS_STATS_ADD(dot11FrameDuplicateCount); 446 DEBUGFS_STATS_ADD(dot11ReceivedFragmentCount); 447 DEBUGFS_STATS_ADD(dot11MulticastReceivedFrameCount); 448 DEBUGFS_STATS_ADD(dot11TransmittedFrameCount); 449 DEBUGFS_STATS_ADD(tx_handlers_drop); 450 DEBUGFS_STATS_ADD(tx_handlers_queued); 451 DEBUGFS_STATS_ADD(tx_handlers_drop_wep); 452 DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc); 453 DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port); 454 DEBUGFS_STATS_ADD(rx_handlers_drop); 455 DEBUGFS_STATS_ADD(rx_handlers_queued); 456 DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc); 457 DEBUGFS_STATS_ADD(rx_handlers_drop_defrag); 458 DEBUGFS_STATS_ADD(tx_expand_skb_head); 459 DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned); 460 DEBUGFS_STATS_ADD(rx_expand_skb_head_defrag); 461 DEBUGFS_STATS_ADD(rx_handlers_fragments); 462 DEBUGFS_STATS_ADD(tx_status_drop); 463 #endif 464 DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount); 465 DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount); 466 DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount); 467 DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount); 468 } 469