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_collisions %u\n" 93 "RW fq_limit %u\n" 94 "RW fq_quantum %u\n", 95 fq->flows_cnt, 96 fq->backlog, 97 fq->overlimit, 98 fq->collisions, 99 fq->limit, 100 fq->quantum); 101 102 rcu_read_unlock(); 103 spin_unlock_bh(&local->fq.lock); 104 105 return simple_read_from_buffer(user_buf, count, ppos, 106 buf, len); 107 } 108 109 static ssize_t aqm_write(struct file *file, 110 const char __user *user_buf, 111 size_t count, 112 loff_t *ppos) 113 { 114 struct ieee80211_local *local = file->private_data; 115 char buf[100]; 116 size_t len; 117 118 if (count > sizeof(buf)) 119 return -EINVAL; 120 121 if (copy_from_user(buf, user_buf, count)) 122 return -EFAULT; 123 124 buf[sizeof(buf) - 1] = '\0'; 125 len = strlen(buf); 126 if (len > 0 && buf[len-1] == '\n') 127 buf[len-1] = 0; 128 129 if (sscanf(buf, "fq_limit %u", &local->fq.limit) == 1) 130 return count; 131 else if (sscanf(buf, "fq_quantum %u", &local->fq.quantum) == 1) 132 return count; 133 134 return -EINVAL; 135 } 136 137 static const struct file_operations aqm_ops = { 138 .write = aqm_write, 139 .read = aqm_read, 140 .open = simple_open, 141 .llseek = default_llseek, 142 }; 143 144 #ifdef CONFIG_PM 145 static ssize_t reset_write(struct file *file, const char __user *user_buf, 146 size_t count, loff_t *ppos) 147 { 148 struct ieee80211_local *local = file->private_data; 149 150 rtnl_lock(); 151 __ieee80211_suspend(&local->hw, NULL); 152 __ieee80211_resume(&local->hw); 153 rtnl_unlock(); 154 155 return count; 156 } 157 158 static const struct file_operations reset_ops = { 159 .write = reset_write, 160 .open = simple_open, 161 .llseek = noop_llseek, 162 }; 163 #endif 164 165 static const char *hw_flag_names[] = { 166 #define FLAG(F) [IEEE80211_HW_##F] = #F 167 FLAG(HAS_RATE_CONTROL), 168 FLAG(RX_INCLUDES_FCS), 169 FLAG(HOST_BROADCAST_PS_BUFFERING), 170 FLAG(SIGNAL_UNSPEC), 171 FLAG(SIGNAL_DBM), 172 FLAG(NEED_DTIM_BEFORE_ASSOC), 173 FLAG(SPECTRUM_MGMT), 174 FLAG(AMPDU_AGGREGATION), 175 FLAG(SUPPORTS_PS), 176 FLAG(PS_NULLFUNC_STACK), 177 FLAG(SUPPORTS_DYNAMIC_PS), 178 FLAG(MFP_CAPABLE), 179 FLAG(WANT_MONITOR_VIF), 180 FLAG(NO_AUTO_VIF), 181 FLAG(SW_CRYPTO_CONTROL), 182 FLAG(SUPPORT_FAST_XMIT), 183 FLAG(REPORTS_TX_ACK_STATUS), 184 FLAG(CONNECTION_MONITOR), 185 FLAG(QUEUE_CONTROL), 186 FLAG(SUPPORTS_PER_STA_GTK), 187 FLAG(AP_LINK_PS), 188 FLAG(TX_AMPDU_SETUP_IN_HW), 189 FLAG(SUPPORTS_RC_TABLE), 190 FLAG(P2P_DEV_ADDR_FOR_INTF), 191 FLAG(TIMING_BEACON_ONLY), 192 FLAG(SUPPORTS_HT_CCK_RATES), 193 FLAG(CHANCTX_STA_CSA), 194 FLAG(SUPPORTS_CLONED_SKBS), 195 FLAG(SINGLE_SCAN_ON_ALL_BANDS), 196 FLAG(TDLS_WIDER_BW), 197 FLAG(SUPPORTS_AMSDU_IN_AMPDU), 198 FLAG(BEACON_TX_STATUS), 199 FLAG(NEEDS_UNIQUE_STA_ADDR), 200 FLAG(SUPPORTS_REORDERING_BUFFER), 201 FLAG(USES_RSS), 202 FLAG(TX_AMSDU), 203 FLAG(TX_FRAG_LIST), 204 FLAG(REPORTS_LOW_ACK), 205 #undef FLAG 206 }; 207 208 static ssize_t hwflags_read(struct file *file, char __user *user_buf, 209 size_t count, loff_t *ppos) 210 { 211 struct ieee80211_local *local = file->private_data; 212 size_t bufsz = 30 * NUM_IEEE80211_HW_FLAGS; 213 char *buf = kzalloc(bufsz, GFP_KERNEL); 214 char *pos = buf, *end = buf + bufsz - 1; 215 ssize_t rv; 216 int i; 217 218 if (!buf) 219 return -ENOMEM; 220 221 /* fail compilation if somebody adds or removes 222 * a flag without updating the name array above 223 */ 224 BUILD_BUG_ON(ARRAY_SIZE(hw_flag_names) != NUM_IEEE80211_HW_FLAGS); 225 226 for (i = 0; i < NUM_IEEE80211_HW_FLAGS; i++) { 227 if (test_bit(i, local->hw.flags)) 228 pos += scnprintf(pos, end - pos, "%s\n", 229 hw_flag_names[i]); 230 } 231 232 rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf)); 233 kfree(buf); 234 return rv; 235 } 236 237 static ssize_t queues_read(struct file *file, char __user *user_buf, 238 size_t count, loff_t *ppos) 239 { 240 struct ieee80211_local *local = file->private_data; 241 unsigned long flags; 242 char buf[IEEE80211_MAX_QUEUES * 20]; 243 int q, res = 0; 244 245 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 246 for (q = 0; q < local->hw.queues; q++) 247 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q, 248 local->queue_stop_reasons[q], 249 skb_queue_len(&local->pending[q])); 250 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 251 252 return simple_read_from_buffer(user_buf, count, ppos, buf, res); 253 } 254 255 DEBUGFS_READONLY_FILE_OPS(hwflags); 256 DEBUGFS_READONLY_FILE_OPS(queues); 257 258 /* statistics stuff */ 259 260 static ssize_t format_devstat_counter(struct ieee80211_local *local, 261 char __user *userbuf, 262 size_t count, loff_t *ppos, 263 int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf, 264 int buflen)) 265 { 266 struct ieee80211_low_level_stats stats; 267 char buf[20]; 268 int res; 269 270 rtnl_lock(); 271 res = drv_get_stats(local, &stats); 272 rtnl_unlock(); 273 if (res) 274 return res; 275 res = printvalue(&stats, buf, sizeof(buf)); 276 return simple_read_from_buffer(userbuf, count, ppos, buf, res); 277 } 278 279 #define DEBUGFS_DEVSTATS_FILE(name) \ 280 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\ 281 char *buf, int buflen) \ 282 { \ 283 return scnprintf(buf, buflen, "%u\n", stats->name); \ 284 } \ 285 static ssize_t stats_ ##name## _read(struct file *file, \ 286 char __user *userbuf, \ 287 size_t count, loff_t *ppos) \ 288 { \ 289 return format_devstat_counter(file->private_data, \ 290 userbuf, \ 291 count, \ 292 ppos, \ 293 print_devstats_##name); \ 294 } \ 295 \ 296 static const struct file_operations stats_ ##name## _ops = { \ 297 .read = stats_ ##name## _read, \ 298 .open = simple_open, \ 299 .llseek = generic_file_llseek, \ 300 }; 301 302 #define DEBUGFS_STATS_ADD(name) \ 303 debugfs_create_u32(#name, 0400, statsd, &local->name); 304 #define DEBUGFS_DEVSTATS_ADD(name) \ 305 debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops); 306 307 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount); 308 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount); 309 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount); 310 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount); 311 312 void debugfs_hw_add(struct ieee80211_local *local) 313 { 314 struct dentry *phyd = local->hw.wiphy->debugfsdir; 315 struct dentry *statsd; 316 317 if (!phyd) 318 return; 319 320 local->debugfs.keys = debugfs_create_dir("keys", phyd); 321 322 DEBUGFS_ADD(total_ps_buffered); 323 DEBUGFS_ADD(wep_iv); 324 DEBUGFS_ADD(queues); 325 #ifdef CONFIG_PM 326 DEBUGFS_ADD_MODE(reset, 0200); 327 #endif 328 DEBUGFS_ADD(hwflags); 329 DEBUGFS_ADD(user_power); 330 DEBUGFS_ADD(power); 331 332 if (local->ops->wake_tx_queue) 333 DEBUGFS_ADD_MODE(aqm, 0600); 334 335 statsd = debugfs_create_dir("statistics", phyd); 336 337 /* if the dir failed, don't put all the other things into the root! */ 338 if (!statsd) 339 return; 340 341 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS 342 DEBUGFS_STATS_ADD(dot11TransmittedFragmentCount); 343 DEBUGFS_STATS_ADD(dot11MulticastTransmittedFrameCount); 344 DEBUGFS_STATS_ADD(dot11FailedCount); 345 DEBUGFS_STATS_ADD(dot11RetryCount); 346 DEBUGFS_STATS_ADD(dot11MultipleRetryCount); 347 DEBUGFS_STATS_ADD(dot11FrameDuplicateCount); 348 DEBUGFS_STATS_ADD(dot11ReceivedFragmentCount); 349 DEBUGFS_STATS_ADD(dot11MulticastReceivedFrameCount); 350 DEBUGFS_STATS_ADD(dot11TransmittedFrameCount); 351 DEBUGFS_STATS_ADD(tx_handlers_drop); 352 DEBUGFS_STATS_ADD(tx_handlers_queued); 353 DEBUGFS_STATS_ADD(tx_handlers_drop_wep); 354 DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc); 355 DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port); 356 DEBUGFS_STATS_ADD(rx_handlers_drop); 357 DEBUGFS_STATS_ADD(rx_handlers_queued); 358 DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc); 359 DEBUGFS_STATS_ADD(rx_handlers_drop_defrag); 360 DEBUGFS_STATS_ADD(tx_expand_skb_head); 361 DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned); 362 DEBUGFS_STATS_ADD(rx_expand_skb_head_defrag); 363 DEBUGFS_STATS_ADD(rx_handlers_fragments); 364 DEBUGFS_STATS_ADD(tx_status_drop); 365 #endif 366 DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount); 367 DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount); 368 DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount); 369 DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount); 370 } 371