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 uapsd_queues_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 return mac80211_format_buffer(user_buf, count, ppos, "0x%x\n", 105 local->uapsd_queues); 106 } 107 108 static ssize_t uapsd_queues_write(struct file *file, 109 const char __user *user_buf, 110 size_t count, loff_t *ppos) 111 { 112 struct ieee80211_local *local = file->private_data; 113 u8 val; 114 int ret; 115 116 ret = kstrtou8_from_user(user_buf, count, 0, &val); 117 if (ret) 118 return ret; 119 120 if (val & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK) 121 return -ERANGE; 122 123 local->uapsd_queues = val; 124 125 return count; 126 } 127 128 static const struct file_operations uapsd_queues_ops = { 129 .read = uapsd_queues_read, 130 .write = uapsd_queues_write, 131 .open = mac80211_open_file_generic, 132 .llseek = default_llseek, 133 }; 134 135 static ssize_t uapsd_max_sp_len_read(struct file *file, char __user *user_buf, 136 size_t count, loff_t *ppos) 137 { 138 struct ieee80211_local *local = file->private_data; 139 140 return mac80211_format_buffer(user_buf, count, ppos, "0x%x\n", 141 local->uapsd_max_sp_len); 142 } 143 144 static ssize_t uapsd_max_sp_len_write(struct file *file, 145 const char __user *user_buf, 146 size_t count, loff_t *ppos) 147 { 148 struct ieee80211_local *local = file->private_data; 149 unsigned long val; 150 char buf[10]; 151 size_t len; 152 int ret; 153 154 len = min(count, sizeof(buf) - 1); 155 if (copy_from_user(buf, user_buf, len)) 156 return -EFAULT; 157 buf[len] = '\0'; 158 159 ret = kstrtoul(buf, 0, &val); 160 161 if (ret) 162 return -EINVAL; 163 164 if (val & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK) 165 return -ERANGE; 166 167 local->uapsd_max_sp_len = val; 168 169 return count; 170 } 171 172 static const struct file_operations uapsd_max_sp_len_ops = { 173 .read = uapsd_max_sp_len_read, 174 .write = uapsd_max_sp_len_write, 175 .open = mac80211_open_file_generic, 176 .llseek = default_llseek, 177 }; 178 179 static ssize_t channel_type_read(struct file *file, char __user *user_buf, 180 size_t count, loff_t *ppos) 181 { 182 struct ieee80211_local *local = file->private_data; 183 const char *buf; 184 185 switch (local->hw.conf.channel_type) { 186 case NL80211_CHAN_NO_HT: 187 buf = "no ht\n"; 188 break; 189 case NL80211_CHAN_HT20: 190 buf = "ht20\n"; 191 break; 192 case NL80211_CHAN_HT40MINUS: 193 buf = "ht40-\n"; 194 break; 195 case NL80211_CHAN_HT40PLUS: 196 buf = "ht40+\n"; 197 break; 198 default: 199 buf = "???"; 200 break; 201 } 202 203 return simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf)); 204 } 205 206 static ssize_t hwflags_read(struct file *file, char __user *user_buf, 207 size_t count, loff_t *ppos) 208 { 209 struct ieee80211_local *local = file->private_data; 210 int mxln = 500; 211 ssize_t rv; 212 char *buf = kzalloc(mxln, GFP_KERNEL); 213 int sf = 0; /* how many written so far */ 214 215 if (!buf) 216 return 0; 217 218 sf += snprintf(buf, mxln - sf, "0x%x\n", local->hw.flags); 219 if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL) 220 sf += snprintf(buf + sf, mxln - sf, "HAS_RATE_CONTROL\n"); 221 if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) 222 sf += snprintf(buf + sf, mxln - sf, "RX_INCLUDES_FCS\n"); 223 if (local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING) 224 sf += snprintf(buf + sf, mxln - sf, 225 "HOST_BCAST_PS_BUFFERING\n"); 226 if (local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE) 227 sf += snprintf(buf + sf, mxln - sf, 228 "2GHZ_SHORT_SLOT_INCAPABLE\n"); 229 if (local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE) 230 sf += snprintf(buf + sf, mxln - sf, 231 "2GHZ_SHORT_PREAMBLE_INCAPABLE\n"); 232 if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) 233 sf += snprintf(buf + sf, mxln - sf, "SIGNAL_UNSPEC\n"); 234 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) 235 sf += snprintf(buf + sf, mxln - sf, "SIGNAL_DBM\n"); 236 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) 237 sf += snprintf(buf + sf, mxln - sf, "NEED_DTIM_PERIOD\n"); 238 if (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT) 239 sf += snprintf(buf + sf, mxln - sf, "SPECTRUM_MGMT\n"); 240 if (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION) 241 sf += snprintf(buf + sf, mxln - sf, "AMPDU_AGGREGATION\n"); 242 if (local->hw.flags & IEEE80211_HW_SUPPORTS_PS) 243 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_PS\n"); 244 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) 245 sf += snprintf(buf + sf, mxln - sf, "PS_NULLFUNC_STACK\n"); 246 if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) 247 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_DYNAMIC_PS\n"); 248 if (local->hw.flags & IEEE80211_HW_MFP_CAPABLE) 249 sf += snprintf(buf + sf, mxln - sf, "MFP_CAPABLE\n"); 250 if (local->hw.flags & IEEE80211_HW_SUPPORTS_STATIC_SMPS) 251 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_STATIC_SMPS\n"); 252 if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS) 253 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_DYNAMIC_SMPS\n"); 254 if (local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) 255 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_UAPSD\n"); 256 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) 257 sf += snprintf(buf + sf, mxln - sf, "REPORTS_TX_ACK_STATUS\n"); 258 if (local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) 259 sf += snprintf(buf + sf, mxln - sf, "CONNECTION_MONITOR\n"); 260 if (local->hw.flags & IEEE80211_HW_SUPPORTS_PER_STA_GTK) 261 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_PER_STA_GTK\n"); 262 if (local->hw.flags & IEEE80211_HW_AP_LINK_PS) 263 sf += snprintf(buf + sf, mxln - sf, "AP_LINK_PS\n"); 264 if (local->hw.flags & IEEE80211_HW_TX_AMPDU_SETUP_IN_HW) 265 sf += snprintf(buf + sf, mxln - sf, "TX_AMPDU_SETUP_IN_HW\n"); 266 267 rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf)); 268 kfree(buf); 269 return rv; 270 } 271 272 static ssize_t queues_read(struct file *file, char __user *user_buf, 273 size_t count, loff_t *ppos) 274 { 275 struct ieee80211_local *local = file->private_data; 276 unsigned long flags; 277 char buf[IEEE80211_MAX_QUEUES * 20]; 278 int q, res = 0; 279 280 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 281 for (q = 0; q < local->hw.queues; q++) 282 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q, 283 local->queue_stop_reasons[q], 284 skb_queue_len(&local->pending[q])); 285 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 286 287 return simple_read_from_buffer(user_buf, count, ppos, buf, res); 288 } 289 290 DEBUGFS_READONLY_FILE_OPS(hwflags); 291 DEBUGFS_READONLY_FILE_OPS(channel_type); 292 DEBUGFS_READONLY_FILE_OPS(queues); 293 294 /* statistics stuff */ 295 296 static ssize_t format_devstat_counter(struct ieee80211_local *local, 297 char __user *userbuf, 298 size_t count, loff_t *ppos, 299 int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf, 300 int buflen)) 301 { 302 struct ieee80211_low_level_stats stats; 303 char buf[20]; 304 int res; 305 306 rtnl_lock(); 307 res = drv_get_stats(local, &stats); 308 rtnl_unlock(); 309 if (res) 310 return res; 311 res = printvalue(&stats, buf, sizeof(buf)); 312 return simple_read_from_buffer(userbuf, count, ppos, buf, res); 313 } 314 315 #define DEBUGFS_DEVSTATS_FILE(name) \ 316 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\ 317 char *buf, int buflen) \ 318 { \ 319 return scnprintf(buf, buflen, "%u\n", stats->name); \ 320 } \ 321 static ssize_t stats_ ##name## _read(struct file *file, \ 322 char __user *userbuf, \ 323 size_t count, loff_t *ppos) \ 324 { \ 325 return format_devstat_counter(file->private_data, \ 326 userbuf, \ 327 count, \ 328 ppos, \ 329 print_devstats_##name); \ 330 } \ 331 \ 332 static const struct file_operations stats_ ##name## _ops = { \ 333 .read = stats_ ##name## _read, \ 334 .open = mac80211_open_file_generic, \ 335 .llseek = generic_file_llseek, \ 336 }; 337 338 #define DEBUGFS_STATS_ADD(name, field) \ 339 debugfs_create_u32(#name, 0400, statsd, (u32 *) &field); 340 #define DEBUGFS_DEVSTATS_ADD(name) \ 341 debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops); 342 343 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount); 344 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount); 345 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount); 346 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount); 347 348 void debugfs_hw_add(struct ieee80211_local *local) 349 { 350 struct dentry *phyd = local->hw.wiphy->debugfsdir; 351 struct dentry *statsd; 352 353 if (!phyd) 354 return; 355 356 local->debugfs.keys = debugfs_create_dir("keys", phyd); 357 358 DEBUGFS_ADD(frequency); 359 DEBUGFS_ADD(total_ps_buffered); 360 DEBUGFS_ADD(wep_iv); 361 DEBUGFS_ADD(queues); 362 DEBUGFS_ADD_MODE(reset, 0200); 363 DEBUGFS_ADD(uapsd_queues); 364 DEBUGFS_ADD(uapsd_max_sp_len); 365 DEBUGFS_ADD(channel_type); 366 DEBUGFS_ADD(hwflags); 367 DEBUGFS_ADD(user_power); 368 DEBUGFS_ADD(power); 369 370 statsd = debugfs_create_dir("statistics", phyd); 371 372 /* if the dir failed, don't put all the other things into the root! */ 373 if (!statsd) 374 return; 375 376 DEBUGFS_STATS_ADD(transmitted_fragment_count, 377 local->dot11TransmittedFragmentCount); 378 DEBUGFS_STATS_ADD(multicast_transmitted_frame_count, 379 local->dot11MulticastTransmittedFrameCount); 380 DEBUGFS_STATS_ADD(failed_count, local->dot11FailedCount); 381 DEBUGFS_STATS_ADD(retry_count, local->dot11RetryCount); 382 DEBUGFS_STATS_ADD(multiple_retry_count, 383 local->dot11MultipleRetryCount); 384 DEBUGFS_STATS_ADD(frame_duplicate_count, 385 local->dot11FrameDuplicateCount); 386 DEBUGFS_STATS_ADD(received_fragment_count, 387 local->dot11ReceivedFragmentCount); 388 DEBUGFS_STATS_ADD(multicast_received_frame_count, 389 local->dot11MulticastReceivedFrameCount); 390 DEBUGFS_STATS_ADD(transmitted_frame_count, 391 local->dot11TransmittedFrameCount); 392 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS 393 DEBUGFS_STATS_ADD(tx_handlers_drop, local->tx_handlers_drop); 394 DEBUGFS_STATS_ADD(tx_handlers_queued, local->tx_handlers_queued); 395 DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted, 396 local->tx_handlers_drop_unencrypted); 397 DEBUGFS_STATS_ADD(tx_handlers_drop_fragment, 398 local->tx_handlers_drop_fragment); 399 DEBUGFS_STATS_ADD(tx_handlers_drop_wep, 400 local->tx_handlers_drop_wep); 401 DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc, 402 local->tx_handlers_drop_not_assoc); 403 DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port, 404 local->tx_handlers_drop_unauth_port); 405 DEBUGFS_STATS_ADD(rx_handlers_drop, local->rx_handlers_drop); 406 DEBUGFS_STATS_ADD(rx_handlers_queued, local->rx_handlers_queued); 407 DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc, 408 local->rx_handlers_drop_nullfunc); 409 DEBUGFS_STATS_ADD(rx_handlers_drop_defrag, 410 local->rx_handlers_drop_defrag); 411 DEBUGFS_STATS_ADD(rx_handlers_drop_short, 412 local->rx_handlers_drop_short); 413 DEBUGFS_STATS_ADD(rx_handlers_drop_passive_scan, 414 local->rx_handlers_drop_passive_scan); 415 DEBUGFS_STATS_ADD(tx_expand_skb_head, 416 local->tx_expand_skb_head); 417 DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned, 418 local->tx_expand_skb_head_cloned); 419 DEBUGFS_STATS_ADD(rx_expand_skb_head, 420 local->rx_expand_skb_head); 421 DEBUGFS_STATS_ADD(rx_expand_skb_head2, 422 local->rx_expand_skb_head2); 423 DEBUGFS_STATS_ADD(rx_handlers_fragments, 424 local->rx_handlers_fragments); 425 DEBUGFS_STATS_ADD(tx_status_drop, 426 local->tx_status_drop); 427 #endif 428 DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount); 429 DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount); 430 DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount); 431 DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount); 432 } 433