1 /* 2 * mac80211 debugfs for wireless PHYs 3 * 4 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> 5 * Copyright 2013-2014 Intel Mobile Communications GmbH 6 * 7 * GPLv2 8 * 9 */ 10 11 #include <linux/debugfs.h> 12 #include <linux/rtnetlink.h> 13 #include <linux/vmalloc.h> 14 #include "ieee80211_i.h" 15 #include "driver-ops.h" 16 #include "rate.h" 17 #include "debugfs.h" 18 19 #define DEBUGFS_FORMAT_BUFFER_SIZE 100 20 21 int mac80211_format_buffer(char __user *userbuf, size_t count, 22 loff_t *ppos, char *fmt, ...) 23 { 24 va_list args; 25 char buf[DEBUGFS_FORMAT_BUFFER_SIZE]; 26 int res; 27 28 va_start(args, fmt); 29 res = vscnprintf(buf, sizeof(buf), fmt, args); 30 va_end(args); 31 32 return simple_read_from_buffer(userbuf, count, ppos, buf, res); 33 } 34 35 #define DEBUGFS_READONLY_FILE_FN(name, fmt, value...) \ 36 static ssize_t name## _read(struct file *file, char __user *userbuf, \ 37 size_t count, loff_t *ppos) \ 38 { \ 39 struct ieee80211_local *local = file->private_data; \ 40 \ 41 return mac80211_format_buffer(userbuf, count, ppos, \ 42 fmt "\n", ##value); \ 43 } 44 45 #define DEBUGFS_READONLY_FILE_OPS(name) \ 46 static const struct file_operations name## _ops = { \ 47 .read = name## _read, \ 48 .open = simple_open, \ 49 .llseek = generic_file_llseek, \ 50 }; 51 52 #define DEBUGFS_READONLY_FILE(name, fmt, value...) \ 53 DEBUGFS_READONLY_FILE_FN(name, fmt, value) \ 54 DEBUGFS_READONLY_FILE_OPS(name) 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(user_power, "%d", 64 local->user_power_level); 65 DEBUGFS_READONLY_FILE(power, "%d", 66 local->hw.conf.power_level); 67 DEBUGFS_READONLY_FILE(total_ps_buffered, "%d", 68 local->total_ps_buffered); 69 DEBUGFS_READONLY_FILE(wep_iv, "%#08x", 70 local->wep_iv & 0xffffff); 71 DEBUGFS_READONLY_FILE(rate_ctrl_alg, "%s", 72 local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver"); 73 74 static ssize_t aqm_read(struct file *file, 75 char __user *user_buf, 76 size_t count, 77 loff_t *ppos) 78 { 79 struct ieee80211_local *local = file->private_data; 80 struct fq *fq = &local->fq; 81 char buf[200]; 82 int len = 0; 83 84 spin_lock_bh(&local->fq.lock); 85 rcu_read_lock(); 86 87 len = scnprintf(buf, sizeof(buf), 88 "access name value\n" 89 "R fq_flows_cnt %u\n" 90 "R fq_backlog %u\n" 91 "R fq_overlimit %u\n" 92 "R fq_overmemory %u\n" 93 "R fq_collisions %u\n" 94 "R fq_memory_usage %u\n" 95 "RW fq_memory_limit %u\n" 96 "RW fq_limit %u\n" 97 "RW fq_quantum %u\n", 98 fq->flows_cnt, 99 fq->backlog, 100 fq->overmemory, 101 fq->overlimit, 102 fq->collisions, 103 fq->memory_usage, 104 fq->memory_limit, 105 fq->limit, 106 fq->quantum); 107 108 rcu_read_unlock(); 109 spin_unlock_bh(&local->fq.lock); 110 111 return simple_read_from_buffer(user_buf, count, ppos, 112 buf, len); 113 } 114 115 static ssize_t aqm_write(struct file *file, 116 const char __user *user_buf, 117 size_t count, 118 loff_t *ppos) 119 { 120 struct ieee80211_local *local = file->private_data; 121 char buf[100]; 122 size_t len; 123 124 if (count > sizeof(buf)) 125 return -EINVAL; 126 127 if (copy_from_user(buf, user_buf, count)) 128 return -EFAULT; 129 130 buf[sizeof(buf) - 1] = '\0'; 131 len = strlen(buf); 132 if (len > 0 && buf[len-1] == '\n') 133 buf[len-1] = 0; 134 135 if (sscanf(buf, "fq_limit %u", &local->fq.limit) == 1) 136 return count; 137 else if (sscanf(buf, "fq_memory_limit %u", &local->fq.memory_limit) == 1) 138 return count; 139 else if (sscanf(buf, "fq_quantum %u", &local->fq.quantum) == 1) 140 return count; 141 142 return -EINVAL; 143 } 144 145 static const struct file_operations aqm_ops = { 146 .write = aqm_write, 147 .read = aqm_read, 148 .open = simple_open, 149 .llseek = default_llseek, 150 }; 151 152 #ifdef CONFIG_PM 153 static ssize_t reset_write(struct file *file, const char __user *user_buf, 154 size_t count, loff_t *ppos) 155 { 156 struct ieee80211_local *local = file->private_data; 157 158 rtnl_lock(); 159 __ieee80211_suspend(&local->hw, NULL); 160 __ieee80211_resume(&local->hw); 161 rtnl_unlock(); 162 163 return count; 164 } 165 166 static const struct file_operations reset_ops = { 167 .write = reset_write, 168 .open = simple_open, 169 .llseek = noop_llseek, 170 }; 171 #endif 172 173 static const char *hw_flag_names[] = { 174 #define FLAG(F) [IEEE80211_HW_##F] = #F 175 FLAG(HAS_RATE_CONTROL), 176 FLAG(RX_INCLUDES_FCS), 177 FLAG(HOST_BROADCAST_PS_BUFFERING), 178 FLAG(SIGNAL_UNSPEC), 179 FLAG(SIGNAL_DBM), 180 FLAG(NEED_DTIM_BEFORE_ASSOC), 181 FLAG(SPECTRUM_MGMT), 182 FLAG(AMPDU_AGGREGATION), 183 FLAG(SUPPORTS_PS), 184 FLAG(PS_NULLFUNC_STACK), 185 FLAG(SUPPORTS_DYNAMIC_PS), 186 FLAG(MFP_CAPABLE), 187 FLAG(WANT_MONITOR_VIF), 188 FLAG(NO_AUTO_VIF), 189 FLAG(SW_CRYPTO_CONTROL), 190 FLAG(SUPPORT_FAST_XMIT), 191 FLAG(REPORTS_TX_ACK_STATUS), 192 FLAG(CONNECTION_MONITOR), 193 FLAG(QUEUE_CONTROL), 194 FLAG(SUPPORTS_PER_STA_GTK), 195 FLAG(AP_LINK_PS), 196 FLAG(TX_AMPDU_SETUP_IN_HW), 197 FLAG(SUPPORTS_RC_TABLE), 198 FLAG(P2P_DEV_ADDR_FOR_INTF), 199 FLAG(TIMING_BEACON_ONLY), 200 FLAG(SUPPORTS_HT_CCK_RATES), 201 FLAG(CHANCTX_STA_CSA), 202 FLAG(SUPPORTS_CLONED_SKBS), 203 FLAG(SINGLE_SCAN_ON_ALL_BANDS), 204 FLAG(TDLS_WIDER_BW), 205 FLAG(SUPPORTS_AMSDU_IN_AMPDU), 206 FLAG(BEACON_TX_STATUS), 207 FLAG(NEEDS_UNIQUE_STA_ADDR), 208 FLAG(SUPPORTS_REORDERING_BUFFER), 209 FLAG(USES_RSS), 210 FLAG(TX_AMSDU), 211 FLAG(TX_FRAG_LIST), 212 FLAG(REPORTS_LOW_ACK), 213 FLAG(SUPPORTS_TX_FRAG), 214 #undef FLAG 215 }; 216 217 static ssize_t hwflags_read(struct file *file, char __user *user_buf, 218 size_t count, loff_t *ppos) 219 { 220 struct ieee80211_local *local = file->private_data; 221 size_t bufsz = 30 * NUM_IEEE80211_HW_FLAGS; 222 char *buf = kzalloc(bufsz, GFP_KERNEL); 223 char *pos = buf, *end = buf + bufsz - 1; 224 ssize_t rv; 225 int i; 226 227 if (!buf) 228 return -ENOMEM; 229 230 /* fail compilation if somebody adds or removes 231 * a flag without updating the name array above 232 */ 233 BUILD_BUG_ON(ARRAY_SIZE(hw_flag_names) != NUM_IEEE80211_HW_FLAGS); 234 235 for (i = 0; i < NUM_IEEE80211_HW_FLAGS; i++) { 236 if (test_bit(i, local->hw.flags)) 237 pos += scnprintf(pos, end - pos, "%s\n", 238 hw_flag_names[i]); 239 } 240 241 rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf)); 242 kfree(buf); 243 return rv; 244 } 245 246 static ssize_t misc_read(struct file *file, char __user *user_buf, 247 size_t count, loff_t *ppos) 248 { 249 struct ieee80211_local *local = file->private_data; 250 /* Max len of each line is 16 characters, plus 9 for 'pending:\n' */ 251 size_t bufsz = IEEE80211_MAX_QUEUES * 16 + 9; 252 char *buf; 253 char *pos, *end; 254 ssize_t rv; 255 int i; 256 int ln; 257 258 buf = kzalloc(bufsz, GFP_KERNEL); 259 if (!buf) 260 return -ENOMEM; 261 262 pos = buf; 263 end = buf + bufsz - 1; 264 265 pos += scnprintf(pos, end - pos, "pending:\n"); 266 267 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 268 ln = skb_queue_len(&local->pending[i]); 269 pos += scnprintf(pos, end - pos, "[%i] %d\n", 270 i, ln); 271 } 272 273 rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf)); 274 kfree(buf); 275 return rv; 276 } 277 278 static ssize_t queues_read(struct file *file, char __user *user_buf, 279 size_t count, loff_t *ppos) 280 { 281 struct ieee80211_local *local = file->private_data; 282 unsigned long flags; 283 char buf[IEEE80211_MAX_QUEUES * 20]; 284 int q, res = 0; 285 286 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 287 for (q = 0; q < local->hw.queues; q++) 288 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q, 289 local->queue_stop_reasons[q], 290 skb_queue_len(&local->pending[q])); 291 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 292 293 return simple_read_from_buffer(user_buf, count, ppos, buf, res); 294 } 295 296 DEBUGFS_READONLY_FILE_OPS(hwflags); 297 DEBUGFS_READONLY_FILE_OPS(queues); 298 DEBUGFS_READONLY_FILE_OPS(misc); 299 300 /* statistics stuff */ 301 302 static ssize_t format_devstat_counter(struct ieee80211_local *local, 303 char __user *userbuf, 304 size_t count, loff_t *ppos, 305 int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf, 306 int buflen)) 307 { 308 struct ieee80211_low_level_stats stats; 309 char buf[20]; 310 int res; 311 312 rtnl_lock(); 313 res = drv_get_stats(local, &stats); 314 rtnl_unlock(); 315 if (res) 316 return res; 317 res = printvalue(&stats, buf, sizeof(buf)); 318 return simple_read_from_buffer(userbuf, count, ppos, buf, res); 319 } 320 321 #define DEBUGFS_DEVSTATS_FILE(name) \ 322 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\ 323 char *buf, int buflen) \ 324 { \ 325 return scnprintf(buf, buflen, "%u\n", stats->name); \ 326 } \ 327 static ssize_t stats_ ##name## _read(struct file *file, \ 328 char __user *userbuf, \ 329 size_t count, loff_t *ppos) \ 330 { \ 331 return format_devstat_counter(file->private_data, \ 332 userbuf, \ 333 count, \ 334 ppos, \ 335 print_devstats_##name); \ 336 } \ 337 \ 338 static const struct file_operations stats_ ##name## _ops = { \ 339 .read = stats_ ##name## _read, \ 340 .open = simple_open, \ 341 .llseek = generic_file_llseek, \ 342 }; 343 344 #define DEBUGFS_STATS_ADD(name) \ 345 debugfs_create_u32(#name, 0400, statsd, &local->name); 346 #define DEBUGFS_DEVSTATS_ADD(name) \ 347 debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops); 348 349 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount); 350 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount); 351 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount); 352 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount); 353 354 void debugfs_hw_add(struct ieee80211_local *local) 355 { 356 struct dentry *phyd = local->hw.wiphy->debugfsdir; 357 struct dentry *statsd; 358 359 if (!phyd) 360 return; 361 362 local->debugfs.keys = debugfs_create_dir("keys", phyd); 363 364 DEBUGFS_ADD(total_ps_buffered); 365 DEBUGFS_ADD(wep_iv); 366 DEBUGFS_ADD(rate_ctrl_alg); 367 DEBUGFS_ADD(queues); 368 DEBUGFS_ADD(misc); 369 #ifdef CONFIG_PM 370 DEBUGFS_ADD_MODE(reset, 0200); 371 #endif 372 DEBUGFS_ADD(hwflags); 373 DEBUGFS_ADD(user_power); 374 DEBUGFS_ADD(power); 375 376 if (local->ops->wake_tx_queue) 377 DEBUGFS_ADD_MODE(aqm, 0600); 378 379 statsd = debugfs_create_dir("statistics", phyd); 380 381 /* if the dir failed, don't put all the other things into the root! */ 382 if (!statsd) 383 return; 384 385 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS 386 DEBUGFS_STATS_ADD(dot11TransmittedFragmentCount); 387 DEBUGFS_STATS_ADD(dot11MulticastTransmittedFrameCount); 388 DEBUGFS_STATS_ADD(dot11FailedCount); 389 DEBUGFS_STATS_ADD(dot11RetryCount); 390 DEBUGFS_STATS_ADD(dot11MultipleRetryCount); 391 DEBUGFS_STATS_ADD(dot11FrameDuplicateCount); 392 DEBUGFS_STATS_ADD(dot11ReceivedFragmentCount); 393 DEBUGFS_STATS_ADD(dot11MulticastReceivedFrameCount); 394 DEBUGFS_STATS_ADD(dot11TransmittedFrameCount); 395 DEBUGFS_STATS_ADD(tx_handlers_drop); 396 DEBUGFS_STATS_ADD(tx_handlers_queued); 397 DEBUGFS_STATS_ADD(tx_handlers_drop_wep); 398 DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc); 399 DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port); 400 DEBUGFS_STATS_ADD(rx_handlers_drop); 401 DEBUGFS_STATS_ADD(rx_handlers_queued); 402 DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc); 403 DEBUGFS_STATS_ADD(rx_handlers_drop_defrag); 404 DEBUGFS_STATS_ADD(tx_expand_skb_head); 405 DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned); 406 DEBUGFS_STATS_ADD(rx_expand_skb_head_defrag); 407 DEBUGFS_STATS_ADD(rx_handlers_fragments); 408 DEBUGFS_STATS_ADD(tx_status_drop); 409 #endif 410 DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount); 411 DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount); 412 DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount); 413 DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount); 414 } 415