1 2 /* 3 * mac80211 debugfs for wireless PHYs 4 * 5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> 6 * 7 * GPLv2 8 * 9 */ 10 11 #include <linux/debugfs.h> 12 #include <linux/rtnetlink.h> 13 #include "ieee80211_i.h" 14 #include "driver-ops.h" 15 #include "rate.h" 16 #include "debugfs.h" 17 18 int mac80211_open_file_generic(struct inode *inode, struct file *file) 19 { 20 file->private_data = inode->i_private; 21 return 0; 22 } 23 24 #define DEBUGFS_FORMAT_BUFFER_SIZE 100 25 26 int mac80211_format_buffer(char __user *userbuf, size_t count, 27 loff_t *ppos, char *fmt, ...) 28 { 29 va_list args; 30 char buf[DEBUGFS_FORMAT_BUFFER_SIZE]; 31 int res; 32 33 va_start(args, fmt); 34 res = vscnprintf(buf, sizeof(buf), fmt, args); 35 va_end(args); 36 37 return simple_read_from_buffer(userbuf, count, ppos, buf, res); 38 } 39 40 #define DEBUGFS_READONLY_FILE_FN(name, fmt, value...) \ 41 static ssize_t name## _read(struct file *file, char __user *userbuf, \ 42 size_t count, loff_t *ppos) \ 43 { \ 44 struct ieee80211_local *local = file->private_data; \ 45 \ 46 return mac80211_format_buffer(userbuf, count, ppos, \ 47 fmt "\n", ##value); \ 48 } 49 50 #define DEBUGFS_READONLY_FILE_OPS(name) \ 51 static const struct file_operations name## _ops = { \ 52 .read = name## _read, \ 53 .open = mac80211_open_file_generic, \ 54 .llseek = generic_file_llseek, \ 55 }; 56 57 #define DEBUGFS_READONLY_FILE(name, fmt, value...) \ 58 DEBUGFS_READONLY_FILE_FN(name, fmt, value) \ 59 DEBUGFS_READONLY_FILE_OPS(name) 60 61 #define DEBUGFS_ADD(name) \ 62 debugfs_create_file(#name, 0400, phyd, local, &name## _ops); 63 64 #define DEBUGFS_ADD_MODE(name, mode) \ 65 debugfs_create_file(#name, mode, phyd, local, &name## _ops); 66 67 68 DEBUGFS_READONLY_FILE(user_power, "%d", 69 local->user_power_level); 70 DEBUGFS_READONLY_FILE(power, "%d", 71 local->hw.conf.power_level); 72 DEBUGFS_READONLY_FILE(frequency, "%d", 73 local->hw.conf.channel->center_freq); 74 DEBUGFS_READONLY_FILE(total_ps_buffered, "%d", 75 local->total_ps_buffered); 76 DEBUGFS_READONLY_FILE(wep_iv, "%#08x", 77 local->wep_iv & 0xffffff); 78 DEBUGFS_READONLY_FILE(rate_ctrl_alg, "%s", 79 local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver"); 80 81 static ssize_t reset_write(struct file *file, const char __user *user_buf, 82 size_t count, loff_t *ppos) 83 { 84 struct ieee80211_local *local = file->private_data; 85 86 rtnl_lock(); 87 __ieee80211_suspend(&local->hw, NULL); 88 __ieee80211_resume(&local->hw); 89 rtnl_unlock(); 90 91 return count; 92 } 93 94 static const struct file_operations reset_ops = { 95 .write = reset_write, 96 .open = mac80211_open_file_generic, 97 .llseek = noop_llseek, 98 }; 99 100 static ssize_t noack_read(struct file *file, char __user *user_buf, 101 size_t count, loff_t *ppos) 102 { 103 struct ieee80211_local *local = file->private_data; 104 105 return mac80211_format_buffer(user_buf, count, ppos, "%d\n", 106 local->wifi_wme_noack_test); 107 } 108 109 static ssize_t noack_write(struct file *file, 110 const char __user *user_buf, 111 size_t count, loff_t *ppos) 112 { 113 struct ieee80211_local *local = file->private_data; 114 char buf[10]; 115 size_t len; 116 117 len = min(count, sizeof(buf) - 1); 118 if (copy_from_user(buf, user_buf, len)) 119 return -EFAULT; 120 buf[len] = '\0'; 121 122 local->wifi_wme_noack_test = !!simple_strtoul(buf, NULL, 0); 123 124 return count; 125 } 126 127 static const struct file_operations noack_ops = { 128 .read = noack_read, 129 .write = noack_write, 130 .open = mac80211_open_file_generic, 131 .llseek = default_llseek, 132 }; 133 134 static ssize_t uapsd_queues_read(struct file *file, char __user *user_buf, 135 size_t count, loff_t *ppos) 136 { 137 struct ieee80211_local *local = file->private_data; 138 return mac80211_format_buffer(user_buf, count, ppos, "0x%x\n", 139 local->uapsd_queues); 140 } 141 142 static ssize_t uapsd_queues_write(struct file *file, 143 const char __user *user_buf, 144 size_t count, loff_t *ppos) 145 { 146 struct ieee80211_local *local = file->private_data; 147 u8 val; 148 int ret; 149 150 ret = kstrtou8_from_user(user_buf, count, 0, &val); 151 if (ret) 152 return ret; 153 154 if (val & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK) 155 return -ERANGE; 156 157 local->uapsd_queues = val; 158 159 return count; 160 } 161 162 static const struct file_operations uapsd_queues_ops = { 163 .read = uapsd_queues_read, 164 .write = uapsd_queues_write, 165 .open = mac80211_open_file_generic, 166 .llseek = default_llseek, 167 }; 168 169 static ssize_t uapsd_max_sp_len_read(struct file *file, char __user *user_buf, 170 size_t count, loff_t *ppos) 171 { 172 struct ieee80211_local *local = file->private_data; 173 174 return mac80211_format_buffer(user_buf, count, ppos, "0x%x\n", 175 local->uapsd_max_sp_len); 176 } 177 178 static ssize_t uapsd_max_sp_len_write(struct file *file, 179 const char __user *user_buf, 180 size_t count, loff_t *ppos) 181 { 182 struct ieee80211_local *local = file->private_data; 183 unsigned long val; 184 char buf[10]; 185 size_t len; 186 int ret; 187 188 len = min(count, sizeof(buf) - 1); 189 if (copy_from_user(buf, user_buf, len)) 190 return -EFAULT; 191 buf[len] = '\0'; 192 193 ret = strict_strtoul(buf, 0, &val); 194 195 if (ret) 196 return -EINVAL; 197 198 if (val & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK) 199 return -ERANGE; 200 201 local->uapsd_max_sp_len = val; 202 203 return count; 204 } 205 206 static const struct file_operations uapsd_max_sp_len_ops = { 207 .read = uapsd_max_sp_len_read, 208 .write = uapsd_max_sp_len_write, 209 .open = mac80211_open_file_generic, 210 .llseek = default_llseek, 211 }; 212 213 static ssize_t channel_type_read(struct file *file, char __user *user_buf, 214 size_t count, loff_t *ppos) 215 { 216 struct ieee80211_local *local = file->private_data; 217 const char *buf; 218 219 switch (local->hw.conf.channel_type) { 220 case NL80211_CHAN_NO_HT: 221 buf = "no ht\n"; 222 break; 223 case NL80211_CHAN_HT20: 224 buf = "ht20\n"; 225 break; 226 case NL80211_CHAN_HT40MINUS: 227 buf = "ht40-\n"; 228 break; 229 case NL80211_CHAN_HT40PLUS: 230 buf = "ht40+\n"; 231 break; 232 default: 233 buf = "???"; 234 break; 235 } 236 237 return simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf)); 238 } 239 240 static ssize_t hwflags_read(struct file *file, char __user *user_buf, 241 size_t count, loff_t *ppos) 242 { 243 struct ieee80211_local *local = file->private_data; 244 int mxln = 500; 245 ssize_t rv; 246 char *buf = kzalloc(mxln, GFP_KERNEL); 247 int sf = 0; /* how many written so far */ 248 249 if (!buf) 250 return 0; 251 252 sf += snprintf(buf, mxln - sf, "0x%x\n", local->hw.flags); 253 if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL) 254 sf += snprintf(buf + sf, mxln - sf, "HAS_RATE_CONTROL\n"); 255 if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) 256 sf += snprintf(buf + sf, mxln - sf, "RX_INCLUDES_FCS\n"); 257 if (local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING) 258 sf += snprintf(buf + sf, mxln - sf, 259 "HOST_BCAST_PS_BUFFERING\n"); 260 if (local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE) 261 sf += snprintf(buf + sf, mxln - sf, 262 "2GHZ_SHORT_SLOT_INCAPABLE\n"); 263 if (local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE) 264 sf += snprintf(buf + sf, mxln - sf, 265 "2GHZ_SHORT_PREAMBLE_INCAPABLE\n"); 266 if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) 267 sf += snprintf(buf + sf, mxln - sf, "SIGNAL_UNSPEC\n"); 268 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) 269 sf += snprintf(buf + sf, mxln - sf, "SIGNAL_DBM\n"); 270 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) 271 sf += snprintf(buf + sf, mxln - sf, "NEED_DTIM_PERIOD\n"); 272 if (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT) 273 sf += snprintf(buf + sf, mxln - sf, "SPECTRUM_MGMT\n"); 274 if (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION) 275 sf += snprintf(buf + sf, mxln - sf, "AMPDU_AGGREGATION\n"); 276 if (local->hw.flags & IEEE80211_HW_SUPPORTS_PS) 277 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_PS\n"); 278 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) 279 sf += snprintf(buf + sf, mxln - sf, "PS_NULLFUNC_STACK\n"); 280 if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) 281 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_DYNAMIC_PS\n"); 282 if (local->hw.flags & IEEE80211_HW_MFP_CAPABLE) 283 sf += snprintf(buf + sf, mxln - sf, "MFP_CAPABLE\n"); 284 if (local->hw.flags & IEEE80211_HW_BEACON_FILTER) 285 sf += snprintf(buf + sf, mxln - sf, "BEACON_FILTER\n"); 286 if (local->hw.flags & IEEE80211_HW_SUPPORTS_STATIC_SMPS) 287 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_STATIC_SMPS\n"); 288 if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS) 289 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_DYNAMIC_SMPS\n"); 290 if (local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) 291 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_UAPSD\n"); 292 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) 293 sf += snprintf(buf + sf, mxln - sf, "REPORTS_TX_ACK_STATUS\n"); 294 if (local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) 295 sf += snprintf(buf + sf, mxln - sf, "CONNECTION_MONITOR\n"); 296 if (local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI) 297 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_CQM_RSSI\n"); 298 if (local->hw.flags & IEEE80211_HW_SUPPORTS_PER_STA_GTK) 299 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_PER_STA_GTK\n"); 300 if (local->hw.flags & IEEE80211_HW_AP_LINK_PS) 301 sf += snprintf(buf + sf, mxln - sf, "AP_LINK_PS\n"); 302 if (local->hw.flags & IEEE80211_HW_TX_AMPDU_SETUP_IN_HW) 303 sf += snprintf(buf + sf, mxln - sf, "TX_AMPDU_SETUP_IN_HW\n"); 304 305 rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf)); 306 kfree(buf); 307 return rv; 308 } 309 310 static ssize_t queues_read(struct file *file, char __user *user_buf, 311 size_t count, loff_t *ppos) 312 { 313 struct ieee80211_local *local = file->private_data; 314 unsigned long flags; 315 char buf[IEEE80211_MAX_QUEUES * 20]; 316 int q, res = 0; 317 318 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 319 for (q = 0; q < local->hw.queues; q++) 320 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q, 321 local->queue_stop_reasons[q], 322 skb_queue_len(&local->pending[q])); 323 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 324 325 return simple_read_from_buffer(user_buf, count, ppos, buf, res); 326 } 327 328 DEBUGFS_READONLY_FILE_OPS(hwflags); 329 DEBUGFS_READONLY_FILE_OPS(channel_type); 330 DEBUGFS_READONLY_FILE_OPS(queues); 331 332 /* statistics stuff */ 333 334 static ssize_t format_devstat_counter(struct ieee80211_local *local, 335 char __user *userbuf, 336 size_t count, loff_t *ppos, 337 int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf, 338 int buflen)) 339 { 340 struct ieee80211_low_level_stats stats; 341 char buf[20]; 342 int res; 343 344 rtnl_lock(); 345 res = drv_get_stats(local, &stats); 346 rtnl_unlock(); 347 if (res) 348 return res; 349 res = printvalue(&stats, buf, sizeof(buf)); 350 return simple_read_from_buffer(userbuf, count, ppos, buf, res); 351 } 352 353 #define DEBUGFS_DEVSTATS_FILE(name) \ 354 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\ 355 char *buf, int buflen) \ 356 { \ 357 return scnprintf(buf, buflen, "%u\n", stats->name); \ 358 } \ 359 static ssize_t stats_ ##name## _read(struct file *file, \ 360 char __user *userbuf, \ 361 size_t count, loff_t *ppos) \ 362 { \ 363 return format_devstat_counter(file->private_data, \ 364 userbuf, \ 365 count, \ 366 ppos, \ 367 print_devstats_##name); \ 368 } \ 369 \ 370 static const struct file_operations stats_ ##name## _ops = { \ 371 .read = stats_ ##name## _read, \ 372 .open = mac80211_open_file_generic, \ 373 .llseek = generic_file_llseek, \ 374 }; 375 376 #define DEBUGFS_STATS_ADD(name, field) \ 377 debugfs_create_u32(#name, 0400, statsd, (u32 *) &field); 378 #define DEBUGFS_DEVSTATS_ADD(name) \ 379 debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops); 380 381 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount); 382 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount); 383 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount); 384 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount); 385 386 void debugfs_hw_add(struct ieee80211_local *local) 387 { 388 struct dentry *phyd = local->hw.wiphy->debugfsdir; 389 struct dentry *statsd; 390 391 if (!phyd) 392 return; 393 394 local->debugfs.keys = debugfs_create_dir("keys", phyd); 395 396 DEBUGFS_ADD(frequency); 397 DEBUGFS_ADD(total_ps_buffered); 398 DEBUGFS_ADD(wep_iv); 399 DEBUGFS_ADD(queues); 400 DEBUGFS_ADD_MODE(reset, 0200); 401 DEBUGFS_ADD(noack); 402 DEBUGFS_ADD(uapsd_queues); 403 DEBUGFS_ADD(uapsd_max_sp_len); 404 DEBUGFS_ADD(channel_type); 405 DEBUGFS_ADD(hwflags); 406 DEBUGFS_ADD(user_power); 407 DEBUGFS_ADD(power); 408 409 statsd = debugfs_create_dir("statistics", phyd); 410 411 /* if the dir failed, don't put all the other things into the root! */ 412 if (!statsd) 413 return; 414 415 DEBUGFS_STATS_ADD(transmitted_fragment_count, 416 local->dot11TransmittedFragmentCount); 417 DEBUGFS_STATS_ADD(multicast_transmitted_frame_count, 418 local->dot11MulticastTransmittedFrameCount); 419 DEBUGFS_STATS_ADD(failed_count, local->dot11FailedCount); 420 DEBUGFS_STATS_ADD(retry_count, local->dot11RetryCount); 421 DEBUGFS_STATS_ADD(multiple_retry_count, 422 local->dot11MultipleRetryCount); 423 DEBUGFS_STATS_ADD(frame_duplicate_count, 424 local->dot11FrameDuplicateCount); 425 DEBUGFS_STATS_ADD(received_fragment_count, 426 local->dot11ReceivedFragmentCount); 427 DEBUGFS_STATS_ADD(multicast_received_frame_count, 428 local->dot11MulticastReceivedFrameCount); 429 DEBUGFS_STATS_ADD(transmitted_frame_count, 430 local->dot11TransmittedFrameCount); 431 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS 432 DEBUGFS_STATS_ADD(tx_handlers_drop, local->tx_handlers_drop); 433 DEBUGFS_STATS_ADD(tx_handlers_queued, local->tx_handlers_queued); 434 DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted, 435 local->tx_handlers_drop_unencrypted); 436 DEBUGFS_STATS_ADD(tx_handlers_drop_fragment, 437 local->tx_handlers_drop_fragment); 438 DEBUGFS_STATS_ADD(tx_handlers_drop_wep, 439 local->tx_handlers_drop_wep); 440 DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc, 441 local->tx_handlers_drop_not_assoc); 442 DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port, 443 local->tx_handlers_drop_unauth_port); 444 DEBUGFS_STATS_ADD(rx_handlers_drop, local->rx_handlers_drop); 445 DEBUGFS_STATS_ADD(rx_handlers_queued, local->rx_handlers_queued); 446 DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc, 447 local->rx_handlers_drop_nullfunc); 448 DEBUGFS_STATS_ADD(rx_handlers_drop_defrag, 449 local->rx_handlers_drop_defrag); 450 DEBUGFS_STATS_ADD(rx_handlers_drop_short, 451 local->rx_handlers_drop_short); 452 DEBUGFS_STATS_ADD(rx_handlers_drop_passive_scan, 453 local->rx_handlers_drop_passive_scan); 454 DEBUGFS_STATS_ADD(tx_expand_skb_head, 455 local->tx_expand_skb_head); 456 DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned, 457 local->tx_expand_skb_head_cloned); 458 DEBUGFS_STATS_ADD(rx_expand_skb_head, 459 local->rx_expand_skb_head); 460 DEBUGFS_STATS_ADD(rx_expand_skb_head2, 461 local->rx_expand_skb_head2); 462 DEBUGFS_STATS_ADD(rx_handlers_fragments, 463 local->rx_handlers_fragments); 464 DEBUGFS_STATS_ADD(tx_status_drop, 465 local->tx_status_drop); 466 #endif 467 DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount); 468 DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount); 469 DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount); 470 DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount); 471 } 472