1 /* 2 * mac80211 debugfs for wireless PHYs 3 * 4 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> 5 * 6 * GPLv2 7 * 8 */ 9 10 #include <linux/debugfs.h> 11 #include <linux/rtnetlink.h> 12 #include "ieee80211_i.h" 13 #include "driver-ops.h" 14 #include "rate.h" 15 #include "debugfs.h" 16 17 int mac80211_open_file_generic(struct inode *inode, struct file *file) 18 { 19 file->private_data = inode->i_private; 20 return 0; 21 } 22 23 #define DEBUGFS_READONLY_FILE(name, buflen, fmt, value...) \ 24 static ssize_t name## _read(struct file *file, char __user *userbuf, \ 25 size_t count, loff_t *ppos) \ 26 { \ 27 struct ieee80211_local *local = file->private_data; \ 28 char buf[buflen]; \ 29 int res; \ 30 \ 31 res = scnprintf(buf, buflen, fmt "\n", ##value); \ 32 return simple_read_from_buffer(userbuf, count, ppos, buf, res); \ 33 } \ 34 \ 35 static const struct file_operations name## _ops = { \ 36 .read = name## _read, \ 37 .open = mac80211_open_file_generic, \ 38 }; 39 40 #define DEBUGFS_ADD(name) \ 41 local->debugfs.name = debugfs_create_file(#name, 0400, phyd, \ 42 local, &name## _ops); 43 44 #define DEBUGFS_ADD_MODE(name, mode) \ 45 local->debugfs.name = debugfs_create_file(#name, mode, phyd, \ 46 local, &name## _ops); 47 48 #define DEBUGFS_DEL(name) \ 49 debugfs_remove(local->debugfs.name); \ 50 local->debugfs.name = NULL; 51 52 53 DEBUGFS_READONLY_FILE(frequency, 20, "%d", 54 local->hw.conf.channel->center_freq); 55 DEBUGFS_READONLY_FILE(total_ps_buffered, 20, "%d", 56 local->total_ps_buffered); 57 DEBUGFS_READONLY_FILE(wep_iv, 20, "%#08x", 58 local->wep_iv & 0xffffff); 59 DEBUGFS_READONLY_FILE(rate_ctrl_alg, 100, "%s", 60 local->rate_ctrl ? local->rate_ctrl->ops->name : "<unset>"); 61 62 static ssize_t tsf_read(struct file *file, char __user *user_buf, 63 size_t count, loff_t *ppos) 64 { 65 struct ieee80211_local *local = file->private_data; 66 u64 tsf; 67 char buf[100]; 68 69 tsf = drv_get_tsf(local); 70 71 snprintf(buf, sizeof(buf), "0x%016llx\n", (unsigned long long) tsf); 72 73 return simple_read_from_buffer(user_buf, count, ppos, buf, 19); 74 } 75 76 static ssize_t tsf_write(struct file *file, 77 const char __user *user_buf, 78 size_t count, loff_t *ppos) 79 { 80 struct ieee80211_local *local = file->private_data; 81 unsigned long long tsf; 82 char buf[100]; 83 size_t len; 84 85 len = min(count, sizeof(buf) - 1); 86 if (copy_from_user(buf, user_buf, len)) 87 return -EFAULT; 88 buf[len] = '\0'; 89 90 if (strncmp(buf, "reset", 5) == 0) { 91 if (local->ops->reset_tsf) { 92 drv_reset_tsf(local); 93 printk(KERN_INFO "%s: debugfs reset TSF\n", wiphy_name(local->hw.wiphy)); 94 } 95 } else { 96 tsf = simple_strtoul(buf, NULL, 0); 97 if (local->ops->set_tsf) { 98 drv_set_tsf(local, tsf); 99 printk(KERN_INFO "%s: debugfs set TSF to %#018llx\n", wiphy_name(local->hw.wiphy), tsf); 100 } 101 } 102 103 return count; 104 } 105 106 static const struct file_operations tsf_ops = { 107 .read = tsf_read, 108 .write = tsf_write, 109 .open = mac80211_open_file_generic 110 }; 111 112 static ssize_t reset_write(struct file *file, const char __user *user_buf, 113 size_t count, loff_t *ppos) 114 { 115 struct ieee80211_local *local = file->private_data; 116 117 rtnl_lock(); 118 __ieee80211_suspend(&local->hw); 119 __ieee80211_resume(&local->hw); 120 rtnl_unlock(); 121 122 return count; 123 } 124 125 static const struct file_operations reset_ops = { 126 .write = reset_write, 127 .open = mac80211_open_file_generic, 128 }; 129 130 static ssize_t noack_read(struct file *file, char __user *user_buf, 131 size_t count, loff_t *ppos) 132 { 133 struct ieee80211_local *local = file->private_data; 134 int res; 135 char buf[10]; 136 137 res = scnprintf(buf, sizeof(buf), "%d\n", local->wifi_wme_noack_test); 138 139 return simple_read_from_buffer(user_buf, count, ppos, buf, res); 140 } 141 142 static ssize_t noack_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 char buf[10]; 148 size_t len; 149 150 len = min(count, sizeof(buf) - 1); 151 if (copy_from_user(buf, user_buf, len)) 152 return -EFAULT; 153 buf[len] = '\0'; 154 155 local->wifi_wme_noack_test = !!simple_strtoul(buf, NULL, 0); 156 157 return count; 158 } 159 160 static const struct file_operations noack_ops = { 161 .read = noack_read, 162 .write = noack_write, 163 .open = mac80211_open_file_generic 164 }; 165 166 static ssize_t queues_read(struct file *file, char __user *user_buf, 167 size_t count, loff_t *ppos) 168 { 169 struct ieee80211_local *local = file->private_data; 170 unsigned long flags; 171 char buf[IEEE80211_MAX_QUEUES * 20]; 172 int q, res = 0; 173 174 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 175 for (q = 0; q < local->hw.queues; q++) 176 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q, 177 local->queue_stop_reasons[q], 178 skb_queue_len(&local->pending[q])); 179 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 180 181 return simple_read_from_buffer(user_buf, count, ppos, buf, res); 182 } 183 184 static const struct file_operations queues_ops = { 185 .read = queues_read, 186 .open = mac80211_open_file_generic 187 }; 188 189 /* statistics stuff */ 190 191 #define DEBUGFS_STATS_FILE(name, buflen, fmt, value...) \ 192 DEBUGFS_READONLY_FILE(stats_ ##name, buflen, fmt, ##value) 193 194 static ssize_t format_devstat_counter(struct ieee80211_local *local, 195 char __user *userbuf, 196 size_t count, loff_t *ppos, 197 int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf, 198 int buflen)) 199 { 200 struct ieee80211_low_level_stats stats; 201 char buf[20]; 202 int res; 203 204 rtnl_lock(); 205 res = drv_get_stats(local, &stats); 206 rtnl_unlock(); 207 if (res) 208 return res; 209 res = printvalue(&stats, buf, sizeof(buf)); 210 return simple_read_from_buffer(userbuf, count, ppos, buf, res); 211 } 212 213 #define DEBUGFS_DEVSTATS_FILE(name) \ 214 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\ 215 char *buf, int buflen) \ 216 { \ 217 return scnprintf(buf, buflen, "%u\n", stats->name); \ 218 } \ 219 static ssize_t stats_ ##name## _read(struct file *file, \ 220 char __user *userbuf, \ 221 size_t count, loff_t *ppos) \ 222 { \ 223 return format_devstat_counter(file->private_data, \ 224 userbuf, \ 225 count, \ 226 ppos, \ 227 print_devstats_##name); \ 228 } \ 229 \ 230 static const struct file_operations stats_ ##name## _ops = { \ 231 .read = stats_ ##name## _read, \ 232 .open = mac80211_open_file_generic, \ 233 }; 234 235 #define DEBUGFS_STATS_ADD(name) \ 236 local->debugfs.stats.name = debugfs_create_file(#name, 0400, statsd,\ 237 local, &stats_ ##name## _ops); 238 239 #define DEBUGFS_STATS_DEL(name) \ 240 debugfs_remove(local->debugfs.stats.name); \ 241 local->debugfs.stats.name = NULL; 242 243 DEBUGFS_STATS_FILE(transmitted_fragment_count, 20, "%u", 244 local->dot11TransmittedFragmentCount); 245 DEBUGFS_STATS_FILE(multicast_transmitted_frame_count, 20, "%u", 246 local->dot11MulticastTransmittedFrameCount); 247 DEBUGFS_STATS_FILE(failed_count, 20, "%u", 248 local->dot11FailedCount); 249 DEBUGFS_STATS_FILE(retry_count, 20, "%u", 250 local->dot11RetryCount); 251 DEBUGFS_STATS_FILE(multiple_retry_count, 20, "%u", 252 local->dot11MultipleRetryCount); 253 DEBUGFS_STATS_FILE(frame_duplicate_count, 20, "%u", 254 local->dot11FrameDuplicateCount); 255 DEBUGFS_STATS_FILE(received_fragment_count, 20, "%u", 256 local->dot11ReceivedFragmentCount); 257 DEBUGFS_STATS_FILE(multicast_received_frame_count, 20, "%u", 258 local->dot11MulticastReceivedFrameCount); 259 DEBUGFS_STATS_FILE(transmitted_frame_count, 20, "%u", 260 local->dot11TransmittedFrameCount); 261 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS 262 DEBUGFS_STATS_FILE(tx_handlers_drop, 20, "%u", 263 local->tx_handlers_drop); 264 DEBUGFS_STATS_FILE(tx_handlers_queued, 20, "%u", 265 local->tx_handlers_queued); 266 DEBUGFS_STATS_FILE(tx_handlers_drop_unencrypted, 20, "%u", 267 local->tx_handlers_drop_unencrypted); 268 DEBUGFS_STATS_FILE(tx_handlers_drop_fragment, 20, "%u", 269 local->tx_handlers_drop_fragment); 270 DEBUGFS_STATS_FILE(tx_handlers_drop_wep, 20, "%u", 271 local->tx_handlers_drop_wep); 272 DEBUGFS_STATS_FILE(tx_handlers_drop_not_assoc, 20, "%u", 273 local->tx_handlers_drop_not_assoc); 274 DEBUGFS_STATS_FILE(tx_handlers_drop_unauth_port, 20, "%u", 275 local->tx_handlers_drop_unauth_port); 276 DEBUGFS_STATS_FILE(rx_handlers_drop, 20, "%u", 277 local->rx_handlers_drop); 278 DEBUGFS_STATS_FILE(rx_handlers_queued, 20, "%u", 279 local->rx_handlers_queued); 280 DEBUGFS_STATS_FILE(rx_handlers_drop_nullfunc, 20, "%u", 281 local->rx_handlers_drop_nullfunc); 282 DEBUGFS_STATS_FILE(rx_handlers_drop_defrag, 20, "%u", 283 local->rx_handlers_drop_defrag); 284 DEBUGFS_STATS_FILE(rx_handlers_drop_short, 20, "%u", 285 local->rx_handlers_drop_short); 286 DEBUGFS_STATS_FILE(rx_handlers_drop_passive_scan, 20, "%u", 287 local->rx_handlers_drop_passive_scan); 288 DEBUGFS_STATS_FILE(tx_expand_skb_head, 20, "%u", 289 local->tx_expand_skb_head); 290 DEBUGFS_STATS_FILE(tx_expand_skb_head_cloned, 20, "%u", 291 local->tx_expand_skb_head_cloned); 292 DEBUGFS_STATS_FILE(rx_expand_skb_head, 20, "%u", 293 local->rx_expand_skb_head); 294 DEBUGFS_STATS_FILE(rx_expand_skb_head2, 20, "%u", 295 local->rx_expand_skb_head2); 296 DEBUGFS_STATS_FILE(rx_handlers_fragments, 20, "%u", 297 local->rx_handlers_fragments); 298 DEBUGFS_STATS_FILE(tx_status_drop, 20, "%u", 299 local->tx_status_drop); 300 301 #endif 302 303 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount); 304 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount); 305 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount); 306 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount); 307 308 309 void debugfs_hw_add(struct ieee80211_local *local) 310 { 311 struct dentry *phyd = local->hw.wiphy->debugfsdir; 312 struct dentry *statsd; 313 314 if (!phyd) 315 return; 316 317 local->debugfs.stations = debugfs_create_dir("stations", phyd); 318 local->debugfs.keys = debugfs_create_dir("keys", phyd); 319 320 DEBUGFS_ADD(frequency); 321 DEBUGFS_ADD(total_ps_buffered); 322 DEBUGFS_ADD(wep_iv); 323 DEBUGFS_ADD(tsf); 324 DEBUGFS_ADD(queues); 325 DEBUGFS_ADD_MODE(reset, 0200); 326 DEBUGFS_ADD(noack); 327 328 statsd = debugfs_create_dir("statistics", phyd); 329 local->debugfs.statistics = statsd; 330 331 /* if the dir failed, don't put all the other things into the root! */ 332 if (!statsd) 333 return; 334 335 DEBUGFS_STATS_ADD(transmitted_fragment_count); 336 DEBUGFS_STATS_ADD(multicast_transmitted_frame_count); 337 DEBUGFS_STATS_ADD(failed_count); 338 DEBUGFS_STATS_ADD(retry_count); 339 DEBUGFS_STATS_ADD(multiple_retry_count); 340 DEBUGFS_STATS_ADD(frame_duplicate_count); 341 DEBUGFS_STATS_ADD(received_fragment_count); 342 DEBUGFS_STATS_ADD(multicast_received_frame_count); 343 DEBUGFS_STATS_ADD(transmitted_frame_count); 344 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS 345 DEBUGFS_STATS_ADD(tx_handlers_drop); 346 DEBUGFS_STATS_ADD(tx_handlers_queued); 347 DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted); 348 DEBUGFS_STATS_ADD(tx_handlers_drop_fragment); 349 DEBUGFS_STATS_ADD(tx_handlers_drop_wep); 350 DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc); 351 DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port); 352 DEBUGFS_STATS_ADD(rx_handlers_drop); 353 DEBUGFS_STATS_ADD(rx_handlers_queued); 354 DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc); 355 DEBUGFS_STATS_ADD(rx_handlers_drop_defrag); 356 DEBUGFS_STATS_ADD(rx_handlers_drop_short); 357 DEBUGFS_STATS_ADD(rx_handlers_drop_passive_scan); 358 DEBUGFS_STATS_ADD(tx_expand_skb_head); 359 DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned); 360 DEBUGFS_STATS_ADD(rx_expand_skb_head); 361 DEBUGFS_STATS_ADD(rx_expand_skb_head2); 362 DEBUGFS_STATS_ADD(rx_handlers_fragments); 363 DEBUGFS_STATS_ADD(tx_status_drop); 364 #endif 365 DEBUGFS_STATS_ADD(dot11ACKFailureCount); 366 DEBUGFS_STATS_ADD(dot11RTSFailureCount); 367 DEBUGFS_STATS_ADD(dot11FCSErrorCount); 368 DEBUGFS_STATS_ADD(dot11RTSSuccessCount); 369 } 370 371 void debugfs_hw_del(struct ieee80211_local *local) 372 { 373 DEBUGFS_DEL(frequency); 374 DEBUGFS_DEL(total_ps_buffered); 375 DEBUGFS_DEL(wep_iv); 376 DEBUGFS_DEL(tsf); 377 DEBUGFS_DEL(queues); 378 DEBUGFS_DEL(reset); 379 DEBUGFS_DEL(noack); 380 381 DEBUGFS_STATS_DEL(transmitted_fragment_count); 382 DEBUGFS_STATS_DEL(multicast_transmitted_frame_count); 383 DEBUGFS_STATS_DEL(failed_count); 384 DEBUGFS_STATS_DEL(retry_count); 385 DEBUGFS_STATS_DEL(multiple_retry_count); 386 DEBUGFS_STATS_DEL(frame_duplicate_count); 387 DEBUGFS_STATS_DEL(received_fragment_count); 388 DEBUGFS_STATS_DEL(multicast_received_frame_count); 389 DEBUGFS_STATS_DEL(transmitted_frame_count); 390 DEBUGFS_STATS_DEL(num_scans); 391 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS 392 DEBUGFS_STATS_DEL(tx_handlers_drop); 393 DEBUGFS_STATS_DEL(tx_handlers_queued); 394 DEBUGFS_STATS_DEL(tx_handlers_drop_unencrypted); 395 DEBUGFS_STATS_DEL(tx_handlers_drop_fragment); 396 DEBUGFS_STATS_DEL(tx_handlers_drop_wep); 397 DEBUGFS_STATS_DEL(tx_handlers_drop_not_assoc); 398 DEBUGFS_STATS_DEL(tx_handlers_drop_unauth_port); 399 DEBUGFS_STATS_DEL(rx_handlers_drop); 400 DEBUGFS_STATS_DEL(rx_handlers_queued); 401 DEBUGFS_STATS_DEL(rx_handlers_drop_nullfunc); 402 DEBUGFS_STATS_DEL(rx_handlers_drop_defrag); 403 DEBUGFS_STATS_DEL(rx_handlers_drop_short); 404 DEBUGFS_STATS_DEL(rx_handlers_drop_passive_scan); 405 DEBUGFS_STATS_DEL(tx_expand_skb_head); 406 DEBUGFS_STATS_DEL(tx_expand_skb_head_cloned); 407 DEBUGFS_STATS_DEL(rx_expand_skb_head); 408 DEBUGFS_STATS_DEL(rx_expand_skb_head2); 409 DEBUGFS_STATS_DEL(rx_handlers_fragments); 410 DEBUGFS_STATS_DEL(tx_status_drop); 411 #endif 412 DEBUGFS_STATS_DEL(dot11ACKFailureCount); 413 DEBUGFS_STATS_DEL(dot11RTSFailureCount); 414 DEBUGFS_STATS_DEL(dot11FCSErrorCount); 415 DEBUGFS_STATS_DEL(dot11RTSSuccessCount); 416 417 debugfs_remove(local->debugfs.statistics); 418 local->debugfs.statistics = NULL; 419 debugfs_remove(local->debugfs.stations); 420 local->debugfs.stations = NULL; 421 debugfs_remove(local->debugfs.keys); 422 local->debugfs.keys = NULL; 423 } 424