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 channel_type_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 const char *buf; 105 106 switch (local->hw.conf.channel_type) { 107 case NL80211_CHAN_NO_HT: 108 buf = "no ht\n"; 109 break; 110 case NL80211_CHAN_HT20: 111 buf = "ht20\n"; 112 break; 113 case NL80211_CHAN_HT40MINUS: 114 buf = "ht40-\n"; 115 break; 116 case NL80211_CHAN_HT40PLUS: 117 buf = "ht40+\n"; 118 break; 119 default: 120 buf = "???"; 121 break; 122 } 123 124 return simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf)); 125 } 126 127 static ssize_t hwflags_read(struct file *file, char __user *user_buf, 128 size_t count, loff_t *ppos) 129 { 130 struct ieee80211_local *local = file->private_data; 131 int mxln = 500; 132 ssize_t rv; 133 char *buf = kzalloc(mxln, GFP_KERNEL); 134 int sf = 0; /* how many written so far */ 135 136 if (!buf) 137 return 0; 138 139 sf += snprintf(buf, mxln - sf, "0x%x\n", local->hw.flags); 140 if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL) 141 sf += snprintf(buf + sf, mxln - sf, "HAS_RATE_CONTROL\n"); 142 if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) 143 sf += snprintf(buf + sf, mxln - sf, "RX_INCLUDES_FCS\n"); 144 if (local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING) 145 sf += snprintf(buf + sf, mxln - sf, 146 "HOST_BCAST_PS_BUFFERING\n"); 147 if (local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE) 148 sf += snprintf(buf + sf, mxln - sf, 149 "2GHZ_SHORT_SLOT_INCAPABLE\n"); 150 if (local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE) 151 sf += snprintf(buf + sf, mxln - sf, 152 "2GHZ_SHORT_PREAMBLE_INCAPABLE\n"); 153 if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) 154 sf += snprintf(buf + sf, mxln - sf, "SIGNAL_UNSPEC\n"); 155 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) 156 sf += snprintf(buf + sf, mxln - sf, "SIGNAL_DBM\n"); 157 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) 158 sf += snprintf(buf + sf, mxln - sf, "NEED_DTIM_PERIOD\n"); 159 if (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT) 160 sf += snprintf(buf + sf, mxln - sf, "SPECTRUM_MGMT\n"); 161 if (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION) 162 sf += snprintf(buf + sf, mxln - sf, "AMPDU_AGGREGATION\n"); 163 if (local->hw.flags & IEEE80211_HW_SUPPORTS_PS) 164 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_PS\n"); 165 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) 166 sf += snprintf(buf + sf, mxln - sf, "PS_NULLFUNC_STACK\n"); 167 if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) 168 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_DYNAMIC_PS\n"); 169 if (local->hw.flags & IEEE80211_HW_MFP_CAPABLE) 170 sf += snprintf(buf + sf, mxln - sf, "MFP_CAPABLE\n"); 171 if (local->hw.flags & IEEE80211_HW_SUPPORTS_STATIC_SMPS) 172 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_STATIC_SMPS\n"); 173 if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS) 174 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_DYNAMIC_SMPS\n"); 175 if (local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) 176 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_UAPSD\n"); 177 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) 178 sf += snprintf(buf + sf, mxln - sf, "REPORTS_TX_ACK_STATUS\n"); 179 if (local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) 180 sf += snprintf(buf + sf, mxln - sf, "CONNECTION_MONITOR\n"); 181 if (local->hw.flags & IEEE80211_HW_SUPPORTS_PER_STA_GTK) 182 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_PER_STA_GTK\n"); 183 if (local->hw.flags & IEEE80211_HW_AP_LINK_PS) 184 sf += snprintf(buf + sf, mxln - sf, "AP_LINK_PS\n"); 185 if (local->hw.flags & IEEE80211_HW_TX_AMPDU_SETUP_IN_HW) 186 sf += snprintf(buf + sf, mxln - sf, "TX_AMPDU_SETUP_IN_HW\n"); 187 if (local->hw.flags & IEEE80211_HW_SCAN_WHILE_IDLE) 188 sf += snprintf(buf + sf, mxln - sf, "SCAN_WHILE_IDLE\n"); 189 190 rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf)); 191 kfree(buf); 192 return rv; 193 } 194 195 static ssize_t queues_read(struct file *file, char __user *user_buf, 196 size_t count, loff_t *ppos) 197 { 198 struct ieee80211_local *local = file->private_data; 199 unsigned long flags; 200 char buf[IEEE80211_MAX_QUEUES * 20]; 201 int q, res = 0; 202 203 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 204 for (q = 0; q < local->hw.queues; q++) 205 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q, 206 local->queue_stop_reasons[q], 207 skb_queue_len(&local->pending[q])); 208 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 209 210 return simple_read_from_buffer(user_buf, count, ppos, buf, res); 211 } 212 213 DEBUGFS_READONLY_FILE_OPS(hwflags); 214 DEBUGFS_READONLY_FILE_OPS(channel_type); 215 DEBUGFS_READONLY_FILE_OPS(queues); 216 217 /* statistics stuff */ 218 219 static ssize_t format_devstat_counter(struct ieee80211_local *local, 220 char __user *userbuf, 221 size_t count, loff_t *ppos, 222 int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf, 223 int buflen)) 224 { 225 struct ieee80211_low_level_stats stats; 226 char buf[20]; 227 int res; 228 229 rtnl_lock(); 230 res = drv_get_stats(local, &stats); 231 rtnl_unlock(); 232 if (res) 233 return res; 234 res = printvalue(&stats, buf, sizeof(buf)); 235 return simple_read_from_buffer(userbuf, count, ppos, buf, res); 236 } 237 238 #define DEBUGFS_DEVSTATS_FILE(name) \ 239 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\ 240 char *buf, int buflen) \ 241 { \ 242 return scnprintf(buf, buflen, "%u\n", stats->name); \ 243 } \ 244 static ssize_t stats_ ##name## _read(struct file *file, \ 245 char __user *userbuf, \ 246 size_t count, loff_t *ppos) \ 247 { \ 248 return format_devstat_counter(file->private_data, \ 249 userbuf, \ 250 count, \ 251 ppos, \ 252 print_devstats_##name); \ 253 } \ 254 \ 255 static const struct file_operations stats_ ##name## _ops = { \ 256 .read = stats_ ##name## _read, \ 257 .open = mac80211_open_file_generic, \ 258 .llseek = generic_file_llseek, \ 259 }; 260 261 #define DEBUGFS_STATS_ADD(name, field) \ 262 debugfs_create_u32(#name, 0400, statsd, (u32 *) &field); 263 #define DEBUGFS_DEVSTATS_ADD(name) \ 264 debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops); 265 266 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount); 267 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount); 268 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount); 269 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount); 270 271 void debugfs_hw_add(struct ieee80211_local *local) 272 { 273 struct dentry *phyd = local->hw.wiphy->debugfsdir; 274 struct dentry *statsd; 275 276 if (!phyd) 277 return; 278 279 local->debugfs.keys = debugfs_create_dir("keys", phyd); 280 281 DEBUGFS_ADD(frequency); 282 DEBUGFS_ADD(total_ps_buffered); 283 DEBUGFS_ADD(wep_iv); 284 DEBUGFS_ADD(queues); 285 DEBUGFS_ADD_MODE(reset, 0200); 286 DEBUGFS_ADD(channel_type); 287 DEBUGFS_ADD(hwflags); 288 DEBUGFS_ADD(user_power); 289 DEBUGFS_ADD(power); 290 291 statsd = debugfs_create_dir("statistics", phyd); 292 293 /* if the dir failed, don't put all the other things into the root! */ 294 if (!statsd) 295 return; 296 297 DEBUGFS_STATS_ADD(transmitted_fragment_count, 298 local->dot11TransmittedFragmentCount); 299 DEBUGFS_STATS_ADD(multicast_transmitted_frame_count, 300 local->dot11MulticastTransmittedFrameCount); 301 DEBUGFS_STATS_ADD(failed_count, local->dot11FailedCount); 302 DEBUGFS_STATS_ADD(retry_count, local->dot11RetryCount); 303 DEBUGFS_STATS_ADD(multiple_retry_count, 304 local->dot11MultipleRetryCount); 305 DEBUGFS_STATS_ADD(frame_duplicate_count, 306 local->dot11FrameDuplicateCount); 307 DEBUGFS_STATS_ADD(received_fragment_count, 308 local->dot11ReceivedFragmentCount); 309 DEBUGFS_STATS_ADD(multicast_received_frame_count, 310 local->dot11MulticastReceivedFrameCount); 311 DEBUGFS_STATS_ADD(transmitted_frame_count, 312 local->dot11TransmittedFrameCount); 313 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS 314 DEBUGFS_STATS_ADD(tx_handlers_drop, local->tx_handlers_drop); 315 DEBUGFS_STATS_ADD(tx_handlers_queued, local->tx_handlers_queued); 316 DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted, 317 local->tx_handlers_drop_unencrypted); 318 DEBUGFS_STATS_ADD(tx_handlers_drop_fragment, 319 local->tx_handlers_drop_fragment); 320 DEBUGFS_STATS_ADD(tx_handlers_drop_wep, 321 local->tx_handlers_drop_wep); 322 DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc, 323 local->tx_handlers_drop_not_assoc); 324 DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port, 325 local->tx_handlers_drop_unauth_port); 326 DEBUGFS_STATS_ADD(rx_handlers_drop, local->rx_handlers_drop); 327 DEBUGFS_STATS_ADD(rx_handlers_queued, local->rx_handlers_queued); 328 DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc, 329 local->rx_handlers_drop_nullfunc); 330 DEBUGFS_STATS_ADD(rx_handlers_drop_defrag, 331 local->rx_handlers_drop_defrag); 332 DEBUGFS_STATS_ADD(rx_handlers_drop_short, 333 local->rx_handlers_drop_short); 334 DEBUGFS_STATS_ADD(rx_handlers_drop_passive_scan, 335 local->rx_handlers_drop_passive_scan); 336 DEBUGFS_STATS_ADD(tx_expand_skb_head, 337 local->tx_expand_skb_head); 338 DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned, 339 local->tx_expand_skb_head_cloned); 340 DEBUGFS_STATS_ADD(rx_expand_skb_head, 341 local->rx_expand_skb_head); 342 DEBUGFS_STATS_ADD(rx_expand_skb_head2, 343 local->rx_expand_skb_head2); 344 DEBUGFS_STATS_ADD(rx_handlers_fragments, 345 local->rx_handlers_fragments); 346 DEBUGFS_STATS_ADD(tx_status_drop, 347 local->tx_status_drop); 348 #endif 349 DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount); 350 DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount); 351 DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount); 352 DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount); 353 } 354