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(frequency, "%d", 64 local->hw.conf.channel->center_freq); 65 DEBUGFS_READONLY_FILE(total_ps_buffered, "%d", 66 local->total_ps_buffered); 67 DEBUGFS_READONLY_FILE(wep_iv, "%#08x", 68 local->wep_iv & 0xffffff); 69 DEBUGFS_READONLY_FILE(rate_ctrl_alg, "%s", 70 local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver"); 71 72 static ssize_t tsf_read(struct file *file, char __user *user_buf, 73 size_t count, loff_t *ppos) 74 { 75 struct ieee80211_local *local = file->private_data; 76 u64 tsf; 77 78 tsf = drv_get_tsf(local); 79 80 return mac80211_format_buffer(user_buf, count, ppos, "0x%016llx\n", 81 (unsigned long long) tsf); 82 } 83 84 static ssize_t tsf_write(struct file *file, 85 const char __user *user_buf, 86 size_t count, loff_t *ppos) 87 { 88 struct ieee80211_local *local = file->private_data; 89 unsigned long long tsf; 90 char buf[100]; 91 size_t len; 92 93 len = min(count, sizeof(buf) - 1); 94 if (copy_from_user(buf, user_buf, len)) 95 return -EFAULT; 96 buf[len] = '\0'; 97 98 if (strncmp(buf, "reset", 5) == 0) { 99 if (local->ops->reset_tsf) { 100 drv_reset_tsf(local); 101 wiphy_info(local->hw.wiphy, "debugfs reset TSF\n"); 102 } 103 } else { 104 tsf = simple_strtoul(buf, NULL, 0); 105 if (local->ops->set_tsf) { 106 drv_set_tsf(local, tsf); 107 wiphy_info(local->hw.wiphy, 108 "debugfs set TSF to %#018llx\n", tsf); 109 110 } 111 } 112 113 return count; 114 } 115 116 static const struct file_operations tsf_ops = { 117 .read = tsf_read, 118 .write = tsf_write, 119 .open = mac80211_open_file_generic, 120 .llseek = default_llseek, 121 }; 122 123 static ssize_t reset_write(struct file *file, const char __user *user_buf, 124 size_t count, loff_t *ppos) 125 { 126 struct ieee80211_local *local = file->private_data; 127 128 rtnl_lock(); 129 __ieee80211_suspend(&local->hw); 130 __ieee80211_resume(&local->hw); 131 rtnl_unlock(); 132 133 return count; 134 } 135 136 static const struct file_operations reset_ops = { 137 .write = reset_write, 138 .open = mac80211_open_file_generic, 139 .llseek = noop_llseek, 140 }; 141 142 static ssize_t noack_read(struct file *file, char __user *user_buf, 143 size_t count, loff_t *ppos) 144 { 145 struct ieee80211_local *local = file->private_data; 146 147 return mac80211_format_buffer(user_buf, count, ppos, "%d\n", 148 local->wifi_wme_noack_test); 149 } 150 151 static ssize_t noack_write(struct file *file, 152 const char __user *user_buf, 153 size_t count, loff_t *ppos) 154 { 155 struct ieee80211_local *local = file->private_data; 156 char buf[10]; 157 size_t len; 158 159 len = min(count, sizeof(buf) - 1); 160 if (copy_from_user(buf, user_buf, len)) 161 return -EFAULT; 162 buf[len] = '\0'; 163 164 local->wifi_wme_noack_test = !!simple_strtoul(buf, NULL, 0); 165 166 return count; 167 } 168 169 static const struct file_operations noack_ops = { 170 .read = noack_read, 171 .write = noack_write, 172 .open = mac80211_open_file_generic, 173 .llseek = default_llseek, 174 }; 175 176 static ssize_t uapsd_queues_read(struct file *file, char __user *user_buf, 177 size_t count, loff_t *ppos) 178 { 179 struct ieee80211_local *local = file->private_data; 180 return mac80211_format_buffer(user_buf, count, ppos, "0x%x\n", 181 local->uapsd_queues); 182 } 183 184 static ssize_t uapsd_queues_write(struct file *file, 185 const char __user *user_buf, 186 size_t count, loff_t *ppos) 187 { 188 struct ieee80211_local *local = file->private_data; 189 unsigned long val; 190 char buf[10]; 191 size_t len; 192 int ret; 193 194 len = min(count, sizeof(buf) - 1); 195 if (copy_from_user(buf, user_buf, len)) 196 return -EFAULT; 197 buf[len] = '\0'; 198 199 ret = strict_strtoul(buf, 0, &val); 200 201 if (ret) 202 return -EINVAL; 203 204 if (val & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK) 205 return -ERANGE; 206 207 local->uapsd_queues = val; 208 209 return count; 210 } 211 212 static const struct file_operations uapsd_queues_ops = { 213 .read = uapsd_queues_read, 214 .write = uapsd_queues_write, 215 .open = mac80211_open_file_generic, 216 .llseek = default_llseek, 217 }; 218 219 static ssize_t uapsd_max_sp_len_read(struct file *file, char __user *user_buf, 220 size_t count, loff_t *ppos) 221 { 222 struct ieee80211_local *local = file->private_data; 223 224 return mac80211_format_buffer(user_buf, count, ppos, "0x%x\n", 225 local->uapsd_max_sp_len); 226 } 227 228 static ssize_t uapsd_max_sp_len_write(struct file *file, 229 const char __user *user_buf, 230 size_t count, loff_t *ppos) 231 { 232 struct ieee80211_local *local = file->private_data; 233 unsigned long val; 234 char buf[10]; 235 size_t len; 236 int ret; 237 238 len = min(count, sizeof(buf) - 1); 239 if (copy_from_user(buf, user_buf, len)) 240 return -EFAULT; 241 buf[len] = '\0'; 242 243 ret = strict_strtoul(buf, 0, &val); 244 245 if (ret) 246 return -EINVAL; 247 248 if (val & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK) 249 return -ERANGE; 250 251 local->uapsd_max_sp_len = val; 252 253 return count; 254 } 255 256 static const struct file_operations uapsd_max_sp_len_ops = { 257 .read = uapsd_max_sp_len_read, 258 .write = uapsd_max_sp_len_write, 259 .open = mac80211_open_file_generic, 260 .llseek = default_llseek, 261 }; 262 263 static ssize_t channel_type_read(struct file *file, char __user *user_buf, 264 size_t count, loff_t *ppos) 265 { 266 struct ieee80211_local *local = file->private_data; 267 const char *buf; 268 269 switch (local->hw.conf.channel_type) { 270 case NL80211_CHAN_NO_HT: 271 buf = "no ht\n"; 272 break; 273 case NL80211_CHAN_HT20: 274 buf = "ht20\n"; 275 break; 276 case NL80211_CHAN_HT40MINUS: 277 buf = "ht40-\n"; 278 break; 279 case NL80211_CHAN_HT40PLUS: 280 buf = "ht40+\n"; 281 break; 282 default: 283 buf = "???"; 284 break; 285 } 286 287 return simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf)); 288 } 289 290 static const struct file_operations channel_type_ops = { 291 .read = channel_type_read, 292 .open = mac80211_open_file_generic, 293 .llseek = default_llseek, 294 }; 295 296 static ssize_t queues_read(struct file *file, char __user *user_buf, 297 size_t count, loff_t *ppos) 298 { 299 struct ieee80211_local *local = file->private_data; 300 unsigned long flags; 301 char buf[IEEE80211_MAX_QUEUES * 20]; 302 int q, res = 0; 303 304 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 305 for (q = 0; q < local->hw.queues; q++) 306 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q, 307 local->queue_stop_reasons[q], 308 skb_queue_len(&local->pending[q])); 309 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 310 311 return simple_read_from_buffer(user_buf, count, ppos, buf, res); 312 } 313 314 static const struct file_operations queues_ops = { 315 .read = queues_read, 316 .open = mac80211_open_file_generic, 317 .llseek = default_llseek, 318 }; 319 320 /* statistics stuff */ 321 322 static ssize_t format_devstat_counter(struct ieee80211_local *local, 323 char __user *userbuf, 324 size_t count, loff_t *ppos, 325 int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf, 326 int buflen)) 327 { 328 struct ieee80211_low_level_stats stats; 329 char buf[20]; 330 int res; 331 332 rtnl_lock(); 333 res = drv_get_stats(local, &stats); 334 rtnl_unlock(); 335 if (res) 336 return res; 337 res = printvalue(&stats, buf, sizeof(buf)); 338 return simple_read_from_buffer(userbuf, count, ppos, buf, res); 339 } 340 341 #define DEBUGFS_DEVSTATS_FILE(name) \ 342 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\ 343 char *buf, int buflen) \ 344 { \ 345 return scnprintf(buf, buflen, "%u\n", stats->name); \ 346 } \ 347 static ssize_t stats_ ##name## _read(struct file *file, \ 348 char __user *userbuf, \ 349 size_t count, loff_t *ppos) \ 350 { \ 351 return format_devstat_counter(file->private_data, \ 352 userbuf, \ 353 count, \ 354 ppos, \ 355 print_devstats_##name); \ 356 } \ 357 \ 358 static const struct file_operations stats_ ##name## _ops = { \ 359 .read = stats_ ##name## _read, \ 360 .open = mac80211_open_file_generic, \ 361 .llseek = generic_file_llseek, \ 362 }; 363 364 #define DEBUGFS_STATS_ADD(name, field) \ 365 debugfs_create_u32(#name, 0400, statsd, (u32 *) &field); 366 #define DEBUGFS_DEVSTATS_ADD(name) \ 367 debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops); 368 369 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount); 370 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount); 371 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount); 372 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount); 373 374 void debugfs_hw_add(struct ieee80211_local *local) 375 { 376 struct dentry *phyd = local->hw.wiphy->debugfsdir; 377 struct dentry *statsd; 378 379 if (!phyd) 380 return; 381 382 local->debugfs.keys = debugfs_create_dir("keys", phyd); 383 384 DEBUGFS_ADD(frequency); 385 DEBUGFS_ADD(total_ps_buffered); 386 DEBUGFS_ADD(wep_iv); 387 DEBUGFS_ADD(tsf); 388 DEBUGFS_ADD(queues); 389 DEBUGFS_ADD_MODE(reset, 0200); 390 DEBUGFS_ADD(noack); 391 DEBUGFS_ADD(uapsd_queues); 392 DEBUGFS_ADD(uapsd_max_sp_len); 393 DEBUGFS_ADD(channel_type); 394 395 statsd = debugfs_create_dir("statistics", phyd); 396 397 /* if the dir failed, don't put all the other things into the root! */ 398 if (!statsd) 399 return; 400 401 DEBUGFS_STATS_ADD(transmitted_fragment_count, 402 local->dot11TransmittedFragmentCount); 403 DEBUGFS_STATS_ADD(multicast_transmitted_frame_count, 404 local->dot11MulticastTransmittedFrameCount); 405 DEBUGFS_STATS_ADD(failed_count, local->dot11FailedCount); 406 DEBUGFS_STATS_ADD(retry_count, local->dot11RetryCount); 407 DEBUGFS_STATS_ADD(multiple_retry_count, 408 local->dot11MultipleRetryCount); 409 DEBUGFS_STATS_ADD(frame_duplicate_count, 410 local->dot11FrameDuplicateCount); 411 DEBUGFS_STATS_ADD(received_fragment_count, 412 local->dot11ReceivedFragmentCount); 413 DEBUGFS_STATS_ADD(multicast_received_frame_count, 414 local->dot11MulticastReceivedFrameCount); 415 DEBUGFS_STATS_ADD(transmitted_frame_count, 416 local->dot11TransmittedFrameCount); 417 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS 418 DEBUGFS_STATS_ADD(tx_handlers_drop, local->tx_handlers_drop); 419 DEBUGFS_STATS_ADD(tx_handlers_queued, local->tx_handlers_queued); 420 DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted, 421 local->tx_handlers_drop_unencrypted); 422 DEBUGFS_STATS_ADD(tx_handlers_drop_fragment, 423 local->tx_handlers_drop_fragment); 424 DEBUGFS_STATS_ADD(tx_handlers_drop_wep, 425 local->tx_handlers_drop_wep); 426 DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc, 427 local->tx_handlers_drop_not_assoc); 428 DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port, 429 local->tx_handlers_drop_unauth_port); 430 DEBUGFS_STATS_ADD(rx_handlers_drop, local->rx_handlers_drop); 431 DEBUGFS_STATS_ADD(rx_handlers_queued, local->rx_handlers_queued); 432 DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc, 433 local->rx_handlers_drop_nullfunc); 434 DEBUGFS_STATS_ADD(rx_handlers_drop_defrag, 435 local->rx_handlers_drop_defrag); 436 DEBUGFS_STATS_ADD(rx_handlers_drop_short, 437 local->rx_handlers_drop_short); 438 DEBUGFS_STATS_ADD(rx_handlers_drop_passive_scan, 439 local->rx_handlers_drop_passive_scan); 440 DEBUGFS_STATS_ADD(tx_expand_skb_head, 441 local->tx_expand_skb_head); 442 DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned, 443 local->tx_expand_skb_head_cloned); 444 DEBUGFS_STATS_ADD(rx_expand_skb_head, 445 local->rx_expand_skb_head); 446 DEBUGFS_STATS_ADD(rx_expand_skb_head2, 447 local->rx_expand_skb_head2); 448 DEBUGFS_STATS_ADD(rx_handlers_fragments, 449 local->rx_handlers_fragments); 450 DEBUGFS_STATS_ADD(tx_status_drop, 451 local->tx_status_drop); 452 #endif 453 DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount); 454 DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount); 455 DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount); 456 DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount); 457 } 458