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(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 static const struct file_operations name## _ops = { \ 51 .read = name## _read, \ 52 .open = mac80211_open_file_generic, \ 53 .llseek = generic_file_llseek, \ 54 }; 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(frequency, "%d", 68 local->hw.conf.channel->center_freq); 69 DEBUGFS_READONLY_FILE(total_ps_buffered, "%d", 70 local->total_ps_buffered); 71 DEBUGFS_READONLY_FILE(wep_iv, "%#08x", 72 local->wep_iv & 0xffffff); 73 DEBUGFS_READONLY_FILE(rate_ctrl_alg, "%s", 74 local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver"); 75 76 static ssize_t tsf_read(struct file *file, char __user *user_buf, 77 size_t count, loff_t *ppos) 78 { 79 struct ieee80211_local *local = file->private_data; 80 u64 tsf; 81 82 tsf = drv_get_tsf(local); 83 84 return mac80211_format_buffer(user_buf, count, ppos, "0x%016llx\n", 85 (unsigned long long) tsf); 86 } 87 88 static ssize_t tsf_write(struct file *file, 89 const char __user *user_buf, 90 size_t count, loff_t *ppos) 91 { 92 struct ieee80211_local *local = file->private_data; 93 unsigned long long tsf; 94 char buf[100]; 95 size_t len; 96 97 len = min(count, sizeof(buf) - 1); 98 if (copy_from_user(buf, user_buf, len)) 99 return -EFAULT; 100 buf[len] = '\0'; 101 102 if (strncmp(buf, "reset", 5) == 0) { 103 if (local->ops->reset_tsf) { 104 drv_reset_tsf(local); 105 wiphy_info(local->hw.wiphy, "debugfs reset TSF\n"); 106 } 107 } else { 108 tsf = simple_strtoul(buf, NULL, 0); 109 if (local->ops->set_tsf) { 110 drv_set_tsf(local, tsf); 111 wiphy_info(local->hw.wiphy, 112 "debugfs set TSF to %#018llx\n", tsf); 113 114 } 115 } 116 117 return count; 118 } 119 120 static const struct file_operations tsf_ops = { 121 .read = tsf_read, 122 .write = tsf_write, 123 .open = mac80211_open_file_generic, 124 .llseek = default_llseek, 125 }; 126 127 static ssize_t reset_write(struct file *file, const char __user *user_buf, 128 size_t count, loff_t *ppos) 129 { 130 struct ieee80211_local *local = file->private_data; 131 132 rtnl_lock(); 133 __ieee80211_suspend(&local->hw); 134 __ieee80211_resume(&local->hw); 135 rtnl_unlock(); 136 137 return count; 138 } 139 140 static const struct file_operations reset_ops = { 141 .write = reset_write, 142 .open = mac80211_open_file_generic, 143 .llseek = noop_llseek, 144 }; 145 146 static ssize_t noack_read(struct file *file, char __user *user_buf, 147 size_t count, loff_t *ppos) 148 { 149 struct ieee80211_local *local = file->private_data; 150 151 return mac80211_format_buffer(user_buf, count, ppos, "%d\n", 152 local->wifi_wme_noack_test); 153 } 154 155 static ssize_t noack_write(struct file *file, 156 const char __user *user_buf, 157 size_t count, loff_t *ppos) 158 { 159 struct ieee80211_local *local = file->private_data; 160 char buf[10]; 161 size_t len; 162 163 len = min(count, sizeof(buf) - 1); 164 if (copy_from_user(buf, user_buf, len)) 165 return -EFAULT; 166 buf[len] = '\0'; 167 168 local->wifi_wme_noack_test = !!simple_strtoul(buf, NULL, 0); 169 170 return count; 171 } 172 173 static const struct file_operations noack_ops = { 174 .read = noack_read, 175 .write = noack_write, 176 .open = mac80211_open_file_generic, 177 .llseek = default_llseek, 178 }; 179 180 static ssize_t uapsd_queues_read(struct file *file, char __user *user_buf, 181 size_t count, loff_t *ppos) 182 { 183 struct ieee80211_local *local = file->private_data; 184 return mac80211_format_buffer(user_buf, count, ppos, "0x%x\n", 185 local->uapsd_queues); 186 } 187 188 static ssize_t uapsd_queues_write(struct file *file, 189 const char __user *user_buf, 190 size_t count, loff_t *ppos) 191 { 192 struct ieee80211_local *local = file->private_data; 193 unsigned long val; 194 char buf[10]; 195 size_t len; 196 int ret; 197 198 len = min(count, sizeof(buf) - 1); 199 if (copy_from_user(buf, user_buf, len)) 200 return -EFAULT; 201 buf[len] = '\0'; 202 203 ret = strict_strtoul(buf, 0, &val); 204 205 if (ret) 206 return -EINVAL; 207 208 if (val & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK) 209 return -ERANGE; 210 211 local->uapsd_queues = val; 212 213 return count; 214 } 215 216 static const struct file_operations uapsd_queues_ops = { 217 .read = uapsd_queues_read, 218 .write = uapsd_queues_write, 219 .open = mac80211_open_file_generic, 220 .llseek = default_llseek, 221 }; 222 223 static ssize_t uapsd_max_sp_len_read(struct file *file, char __user *user_buf, 224 size_t count, loff_t *ppos) 225 { 226 struct ieee80211_local *local = file->private_data; 227 228 return mac80211_format_buffer(user_buf, count, ppos, "0x%x\n", 229 local->uapsd_max_sp_len); 230 } 231 232 static ssize_t uapsd_max_sp_len_write(struct file *file, 233 const char __user *user_buf, 234 size_t count, loff_t *ppos) 235 { 236 struct ieee80211_local *local = file->private_data; 237 unsigned long val; 238 char buf[10]; 239 size_t len; 240 int ret; 241 242 len = min(count, sizeof(buf) - 1); 243 if (copy_from_user(buf, user_buf, len)) 244 return -EFAULT; 245 buf[len] = '\0'; 246 247 ret = strict_strtoul(buf, 0, &val); 248 249 if (ret) 250 return -EINVAL; 251 252 if (val & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK) 253 return -ERANGE; 254 255 local->uapsd_max_sp_len = val; 256 257 return count; 258 } 259 260 static const struct file_operations uapsd_max_sp_len_ops = { 261 .read = uapsd_max_sp_len_read, 262 .write = uapsd_max_sp_len_write, 263 .open = mac80211_open_file_generic, 264 .llseek = default_llseek, 265 }; 266 267 static ssize_t channel_type_read(struct file *file, char __user *user_buf, 268 size_t count, loff_t *ppos) 269 { 270 struct ieee80211_local *local = file->private_data; 271 const char *buf; 272 273 switch (local->hw.conf.channel_type) { 274 case NL80211_CHAN_NO_HT: 275 buf = "no ht\n"; 276 break; 277 case NL80211_CHAN_HT20: 278 buf = "ht20\n"; 279 break; 280 case NL80211_CHAN_HT40MINUS: 281 buf = "ht40-\n"; 282 break; 283 case NL80211_CHAN_HT40PLUS: 284 buf = "ht40+\n"; 285 break; 286 default: 287 buf = "???"; 288 break; 289 } 290 291 return simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf)); 292 } 293 294 static const struct file_operations channel_type_ops = { 295 .read = channel_type_read, 296 .open = mac80211_open_file_generic, 297 .llseek = default_llseek, 298 }; 299 300 static ssize_t queues_read(struct file *file, char __user *user_buf, 301 size_t count, loff_t *ppos) 302 { 303 struct ieee80211_local *local = file->private_data; 304 unsigned long flags; 305 char buf[IEEE80211_MAX_QUEUES * 20]; 306 int q, res = 0; 307 308 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 309 for (q = 0; q < local->hw.queues; q++) 310 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q, 311 local->queue_stop_reasons[q], 312 skb_queue_len(&local->pending[q])); 313 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 314 315 return simple_read_from_buffer(user_buf, count, ppos, buf, res); 316 } 317 318 static const struct file_operations queues_ops = { 319 .read = queues_read, 320 .open = mac80211_open_file_generic, 321 .llseek = default_llseek, 322 }; 323 324 /* statistics stuff */ 325 326 static ssize_t format_devstat_counter(struct ieee80211_local *local, 327 char __user *userbuf, 328 size_t count, loff_t *ppos, 329 int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf, 330 int buflen)) 331 { 332 struct ieee80211_low_level_stats stats; 333 char buf[20]; 334 int res; 335 336 rtnl_lock(); 337 res = drv_get_stats(local, &stats); 338 rtnl_unlock(); 339 if (res) 340 return res; 341 res = printvalue(&stats, buf, sizeof(buf)); 342 return simple_read_from_buffer(userbuf, count, ppos, buf, res); 343 } 344 345 #define DEBUGFS_DEVSTATS_FILE(name) \ 346 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\ 347 char *buf, int buflen) \ 348 { \ 349 return scnprintf(buf, buflen, "%u\n", stats->name); \ 350 } \ 351 static ssize_t stats_ ##name## _read(struct file *file, \ 352 char __user *userbuf, \ 353 size_t count, loff_t *ppos) \ 354 { \ 355 return format_devstat_counter(file->private_data, \ 356 userbuf, \ 357 count, \ 358 ppos, \ 359 print_devstats_##name); \ 360 } \ 361 \ 362 static const struct file_operations stats_ ##name## _ops = { \ 363 .read = stats_ ##name## _read, \ 364 .open = mac80211_open_file_generic, \ 365 .llseek = generic_file_llseek, \ 366 }; 367 368 #define DEBUGFS_STATS_ADD(name, field) \ 369 debugfs_create_u32(#name, 0400, statsd, (u32 *) &field); 370 #define DEBUGFS_DEVSTATS_ADD(name) \ 371 debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops); 372 373 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount); 374 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount); 375 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount); 376 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount); 377 378 void debugfs_hw_add(struct ieee80211_local *local) 379 { 380 struct dentry *phyd = local->hw.wiphy->debugfsdir; 381 struct dentry *statsd; 382 383 if (!phyd) 384 return; 385 386 local->debugfs.keys = debugfs_create_dir("keys", phyd); 387 388 DEBUGFS_ADD(frequency); 389 DEBUGFS_ADD(total_ps_buffered); 390 DEBUGFS_ADD(wep_iv); 391 DEBUGFS_ADD(tsf); 392 DEBUGFS_ADD(queues); 393 DEBUGFS_ADD_MODE(reset, 0200); 394 DEBUGFS_ADD(noack); 395 DEBUGFS_ADD(uapsd_queues); 396 DEBUGFS_ADD(uapsd_max_sp_len); 397 DEBUGFS_ADD(channel_type); 398 DEBUGFS_ADD(user_power); 399 DEBUGFS_ADD(power); 400 401 statsd = debugfs_create_dir("statistics", phyd); 402 403 /* if the dir failed, don't put all the other things into the root! */ 404 if (!statsd) 405 return; 406 407 DEBUGFS_STATS_ADD(transmitted_fragment_count, 408 local->dot11TransmittedFragmentCount); 409 DEBUGFS_STATS_ADD(multicast_transmitted_frame_count, 410 local->dot11MulticastTransmittedFrameCount); 411 DEBUGFS_STATS_ADD(failed_count, local->dot11FailedCount); 412 DEBUGFS_STATS_ADD(retry_count, local->dot11RetryCount); 413 DEBUGFS_STATS_ADD(multiple_retry_count, 414 local->dot11MultipleRetryCount); 415 DEBUGFS_STATS_ADD(frame_duplicate_count, 416 local->dot11FrameDuplicateCount); 417 DEBUGFS_STATS_ADD(received_fragment_count, 418 local->dot11ReceivedFragmentCount); 419 DEBUGFS_STATS_ADD(multicast_received_frame_count, 420 local->dot11MulticastReceivedFrameCount); 421 DEBUGFS_STATS_ADD(transmitted_frame_count, 422 local->dot11TransmittedFrameCount); 423 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS 424 DEBUGFS_STATS_ADD(tx_handlers_drop, local->tx_handlers_drop); 425 DEBUGFS_STATS_ADD(tx_handlers_queued, local->tx_handlers_queued); 426 DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted, 427 local->tx_handlers_drop_unencrypted); 428 DEBUGFS_STATS_ADD(tx_handlers_drop_fragment, 429 local->tx_handlers_drop_fragment); 430 DEBUGFS_STATS_ADD(tx_handlers_drop_wep, 431 local->tx_handlers_drop_wep); 432 DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc, 433 local->tx_handlers_drop_not_assoc); 434 DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port, 435 local->tx_handlers_drop_unauth_port); 436 DEBUGFS_STATS_ADD(rx_handlers_drop, local->rx_handlers_drop); 437 DEBUGFS_STATS_ADD(rx_handlers_queued, local->rx_handlers_queued); 438 DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc, 439 local->rx_handlers_drop_nullfunc); 440 DEBUGFS_STATS_ADD(rx_handlers_drop_defrag, 441 local->rx_handlers_drop_defrag); 442 DEBUGFS_STATS_ADD(rx_handlers_drop_short, 443 local->rx_handlers_drop_short); 444 DEBUGFS_STATS_ADD(rx_handlers_drop_passive_scan, 445 local->rx_handlers_drop_passive_scan); 446 DEBUGFS_STATS_ADD(tx_expand_skb_head, 447 local->tx_expand_skb_head); 448 DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned, 449 local->tx_expand_skb_head_cloned); 450 DEBUGFS_STATS_ADD(rx_expand_skb_head, 451 local->rx_expand_skb_head); 452 DEBUGFS_STATS_ADD(rx_expand_skb_head2, 453 local->rx_expand_skb_head2); 454 DEBUGFS_STATS_ADD(rx_handlers_fragments, 455 local->rx_handlers_fragments); 456 DEBUGFS_STATS_ADD(tx_status_drop, 457 local->tx_status_drop); 458 #endif 459 DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount); 460 DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount); 461 DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount); 462 DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount); 463 } 464