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 #define DEBUGFS_FORMAT_BUFFER_SIZE 100 19 20 int mac80211_format_buffer(char __user *userbuf, size_t count, 21 loff_t *ppos, char *fmt, ...) 22 { 23 va_list args; 24 char buf[DEBUGFS_FORMAT_BUFFER_SIZE]; 25 int res; 26 27 va_start(args, fmt); 28 res = vscnprintf(buf, sizeof(buf), fmt, args); 29 va_end(args); 30 31 return simple_read_from_buffer(userbuf, count, ppos, buf, res); 32 } 33 34 #define DEBUGFS_READONLY_FILE_FN(name, fmt, value...) \ 35 static ssize_t name## _read(struct file *file, char __user *userbuf, \ 36 size_t count, loff_t *ppos) \ 37 { \ 38 struct ieee80211_local *local = file->private_data; \ 39 \ 40 return mac80211_format_buffer(userbuf, count, ppos, \ 41 fmt "\n", ##value); \ 42 } 43 44 #define DEBUGFS_READONLY_FILE_OPS(name) \ 45 static const struct file_operations name## _ops = { \ 46 .read = name## _read, \ 47 .open = simple_open, \ 48 .llseek = generic_file_llseek, \ 49 }; 50 51 #define DEBUGFS_READONLY_FILE(name, fmt, value...) \ 52 DEBUGFS_READONLY_FILE_FN(name, fmt, value) \ 53 DEBUGFS_READONLY_FILE_OPS(name) 54 55 #define DEBUGFS_ADD(name) \ 56 debugfs_create_file(#name, 0400, phyd, local, &name## _ops); 57 58 #define DEBUGFS_ADD_MODE(name, mode) \ 59 debugfs_create_file(#name, mode, phyd, local, &name## _ops); 60 61 62 DEBUGFS_READONLY_FILE(user_power, "%d", 63 local->user_power_level); 64 DEBUGFS_READONLY_FILE(power, "%d", 65 local->hw.conf.power_level); 66 DEBUGFS_READONLY_FILE(frequency, "%d", 67 local->hw.conf.channel->center_freq); 68 DEBUGFS_READONLY_FILE(total_ps_buffered, "%d", 69 local->total_ps_buffered); 70 DEBUGFS_READONLY_FILE(wep_iv, "%#08x", 71 local->wep_iv & 0xffffff); 72 DEBUGFS_READONLY_FILE(rate_ctrl_alg, "%s", 73 local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver"); 74 75 static ssize_t reset_write(struct file *file, const char __user *user_buf, 76 size_t count, loff_t *ppos) 77 { 78 struct ieee80211_local *local = file->private_data; 79 80 rtnl_lock(); 81 __ieee80211_suspend(&local->hw, NULL); 82 __ieee80211_resume(&local->hw); 83 rtnl_unlock(); 84 85 return count; 86 } 87 88 static const struct file_operations reset_ops = { 89 .write = reset_write, 90 .open = simple_open, 91 .llseek = noop_llseek, 92 }; 93 94 static ssize_t channel_type_read(struct file *file, char __user *user_buf, 95 size_t count, loff_t *ppos) 96 { 97 struct ieee80211_local *local = file->private_data; 98 const char *buf; 99 100 switch (local->hw.conf.channel_type) { 101 case NL80211_CHAN_NO_HT: 102 buf = "no ht\n"; 103 break; 104 case NL80211_CHAN_HT20: 105 buf = "ht20\n"; 106 break; 107 case NL80211_CHAN_HT40MINUS: 108 buf = "ht40-\n"; 109 break; 110 case NL80211_CHAN_HT40PLUS: 111 buf = "ht40+\n"; 112 break; 113 default: 114 buf = "???"; 115 break; 116 } 117 118 return simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf)); 119 } 120 121 static ssize_t hwflags_read(struct file *file, char __user *user_buf, 122 size_t count, loff_t *ppos) 123 { 124 struct ieee80211_local *local = file->private_data; 125 int mxln = 500; 126 ssize_t rv; 127 char *buf = kzalloc(mxln, GFP_KERNEL); 128 int sf = 0; /* how many written so far */ 129 130 if (!buf) 131 return 0; 132 133 sf += snprintf(buf, mxln - sf, "0x%x\n", local->hw.flags); 134 if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL) 135 sf += snprintf(buf + sf, mxln - sf, "HAS_RATE_CONTROL\n"); 136 if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) 137 sf += snprintf(buf + sf, mxln - sf, "RX_INCLUDES_FCS\n"); 138 if (local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING) 139 sf += snprintf(buf + sf, mxln - sf, 140 "HOST_BCAST_PS_BUFFERING\n"); 141 if (local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE) 142 sf += snprintf(buf + sf, mxln - sf, 143 "2GHZ_SHORT_SLOT_INCAPABLE\n"); 144 if (local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE) 145 sf += snprintf(buf + sf, mxln - sf, 146 "2GHZ_SHORT_PREAMBLE_INCAPABLE\n"); 147 if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) 148 sf += snprintf(buf + sf, mxln - sf, "SIGNAL_UNSPEC\n"); 149 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) 150 sf += snprintf(buf + sf, mxln - sf, "SIGNAL_DBM\n"); 151 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) 152 sf += snprintf(buf + sf, mxln - sf, "NEED_DTIM_PERIOD\n"); 153 if (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT) 154 sf += snprintf(buf + sf, mxln - sf, "SPECTRUM_MGMT\n"); 155 if (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION) 156 sf += snprintf(buf + sf, mxln - sf, "AMPDU_AGGREGATION\n"); 157 if (local->hw.flags & IEEE80211_HW_SUPPORTS_PS) 158 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_PS\n"); 159 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) 160 sf += snprintf(buf + sf, mxln - sf, "PS_NULLFUNC_STACK\n"); 161 if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) 162 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_DYNAMIC_PS\n"); 163 if (local->hw.flags & IEEE80211_HW_MFP_CAPABLE) 164 sf += snprintf(buf + sf, mxln - sf, "MFP_CAPABLE\n"); 165 if (local->hw.flags & IEEE80211_HW_SUPPORTS_STATIC_SMPS) 166 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_STATIC_SMPS\n"); 167 if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS) 168 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_DYNAMIC_SMPS\n"); 169 if (local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) 170 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_UAPSD\n"); 171 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) 172 sf += snprintf(buf + sf, mxln - sf, "REPORTS_TX_ACK_STATUS\n"); 173 if (local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) 174 sf += snprintf(buf + sf, mxln - sf, "CONNECTION_MONITOR\n"); 175 if (local->hw.flags & IEEE80211_HW_SUPPORTS_PER_STA_GTK) 176 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_PER_STA_GTK\n"); 177 if (local->hw.flags & IEEE80211_HW_AP_LINK_PS) 178 sf += snprintf(buf + sf, mxln - sf, "AP_LINK_PS\n"); 179 if (local->hw.flags & IEEE80211_HW_TX_AMPDU_SETUP_IN_HW) 180 sf += snprintf(buf + sf, mxln - sf, "TX_AMPDU_SETUP_IN_HW\n"); 181 if (local->hw.flags & IEEE80211_HW_SCAN_WHILE_IDLE) 182 sf += snprintf(buf + sf, mxln - sf, "SCAN_WHILE_IDLE\n"); 183 184 rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf)); 185 kfree(buf); 186 return rv; 187 } 188 189 static ssize_t queues_read(struct file *file, char __user *user_buf, 190 size_t count, loff_t *ppos) 191 { 192 struct ieee80211_local *local = file->private_data; 193 unsigned long flags; 194 char buf[IEEE80211_MAX_QUEUES * 20]; 195 int q, res = 0; 196 197 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 198 for (q = 0; q < local->hw.queues; q++) 199 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q, 200 local->queue_stop_reasons[q], 201 skb_queue_len(&local->pending[q])); 202 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 203 204 return simple_read_from_buffer(user_buf, count, ppos, buf, res); 205 } 206 207 DEBUGFS_READONLY_FILE_OPS(hwflags); 208 DEBUGFS_READONLY_FILE_OPS(channel_type); 209 DEBUGFS_READONLY_FILE_OPS(queues); 210 211 /* statistics stuff */ 212 213 static ssize_t format_devstat_counter(struct ieee80211_local *local, 214 char __user *userbuf, 215 size_t count, loff_t *ppos, 216 int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf, 217 int buflen)) 218 { 219 struct ieee80211_low_level_stats stats; 220 char buf[20]; 221 int res; 222 223 rtnl_lock(); 224 res = drv_get_stats(local, &stats); 225 rtnl_unlock(); 226 if (res) 227 return res; 228 res = printvalue(&stats, buf, sizeof(buf)); 229 return simple_read_from_buffer(userbuf, count, ppos, buf, res); 230 } 231 232 #define DEBUGFS_DEVSTATS_FILE(name) \ 233 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\ 234 char *buf, int buflen) \ 235 { \ 236 return scnprintf(buf, buflen, "%u\n", stats->name); \ 237 } \ 238 static ssize_t stats_ ##name## _read(struct file *file, \ 239 char __user *userbuf, \ 240 size_t count, loff_t *ppos) \ 241 { \ 242 return format_devstat_counter(file->private_data, \ 243 userbuf, \ 244 count, \ 245 ppos, \ 246 print_devstats_##name); \ 247 } \ 248 \ 249 static const struct file_operations stats_ ##name## _ops = { \ 250 .read = stats_ ##name## _read, \ 251 .open = simple_open, \ 252 .llseek = generic_file_llseek, \ 253 }; 254 255 #define DEBUGFS_STATS_ADD(name, field) \ 256 debugfs_create_u32(#name, 0400, statsd, (u32 *) &field); 257 #define DEBUGFS_DEVSTATS_ADD(name) \ 258 debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops); 259 260 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount); 261 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount); 262 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount); 263 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount); 264 265 void debugfs_hw_add(struct ieee80211_local *local) 266 { 267 struct dentry *phyd = local->hw.wiphy->debugfsdir; 268 struct dentry *statsd; 269 270 if (!phyd) 271 return; 272 273 local->debugfs.keys = debugfs_create_dir("keys", phyd); 274 275 DEBUGFS_ADD(frequency); 276 DEBUGFS_ADD(total_ps_buffered); 277 DEBUGFS_ADD(wep_iv); 278 DEBUGFS_ADD(queues); 279 DEBUGFS_ADD_MODE(reset, 0200); 280 DEBUGFS_ADD(channel_type); 281 DEBUGFS_ADD(hwflags); 282 DEBUGFS_ADD(user_power); 283 DEBUGFS_ADD(power); 284 285 statsd = debugfs_create_dir("statistics", phyd); 286 287 /* if the dir failed, don't put all the other things into the root! */ 288 if (!statsd) 289 return; 290 291 DEBUGFS_STATS_ADD(transmitted_fragment_count, 292 local->dot11TransmittedFragmentCount); 293 DEBUGFS_STATS_ADD(multicast_transmitted_frame_count, 294 local->dot11MulticastTransmittedFrameCount); 295 DEBUGFS_STATS_ADD(failed_count, local->dot11FailedCount); 296 DEBUGFS_STATS_ADD(retry_count, local->dot11RetryCount); 297 DEBUGFS_STATS_ADD(multiple_retry_count, 298 local->dot11MultipleRetryCount); 299 DEBUGFS_STATS_ADD(frame_duplicate_count, 300 local->dot11FrameDuplicateCount); 301 DEBUGFS_STATS_ADD(received_fragment_count, 302 local->dot11ReceivedFragmentCount); 303 DEBUGFS_STATS_ADD(multicast_received_frame_count, 304 local->dot11MulticastReceivedFrameCount); 305 DEBUGFS_STATS_ADD(transmitted_frame_count, 306 local->dot11TransmittedFrameCount); 307 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS 308 DEBUGFS_STATS_ADD(tx_handlers_drop, local->tx_handlers_drop); 309 DEBUGFS_STATS_ADD(tx_handlers_queued, local->tx_handlers_queued); 310 DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted, 311 local->tx_handlers_drop_unencrypted); 312 DEBUGFS_STATS_ADD(tx_handlers_drop_fragment, 313 local->tx_handlers_drop_fragment); 314 DEBUGFS_STATS_ADD(tx_handlers_drop_wep, 315 local->tx_handlers_drop_wep); 316 DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc, 317 local->tx_handlers_drop_not_assoc); 318 DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port, 319 local->tx_handlers_drop_unauth_port); 320 DEBUGFS_STATS_ADD(rx_handlers_drop, local->rx_handlers_drop); 321 DEBUGFS_STATS_ADD(rx_handlers_queued, local->rx_handlers_queued); 322 DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc, 323 local->rx_handlers_drop_nullfunc); 324 DEBUGFS_STATS_ADD(rx_handlers_drop_defrag, 325 local->rx_handlers_drop_defrag); 326 DEBUGFS_STATS_ADD(rx_handlers_drop_short, 327 local->rx_handlers_drop_short); 328 DEBUGFS_STATS_ADD(tx_expand_skb_head, 329 local->tx_expand_skb_head); 330 DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned, 331 local->tx_expand_skb_head_cloned); 332 DEBUGFS_STATS_ADD(rx_expand_skb_head, 333 local->rx_expand_skb_head); 334 DEBUGFS_STATS_ADD(rx_expand_skb_head2, 335 local->rx_expand_skb_head2); 336 DEBUGFS_STATS_ADD(rx_handlers_fragments, 337 local->rx_handlers_fragments); 338 DEBUGFS_STATS_ADD(tx_status_drop, 339 local->tx_status_drop); 340 #endif 341 DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount); 342 DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount); 343 DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount); 344 DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount); 345 } 346