1 /* 2 * Copyright 2003-2005 Devicescape Software, Inc. 3 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz> 4 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 */ 10 11 #include <linux/debugfs.h> 12 #include <linux/ieee80211.h> 13 #include "ieee80211_i.h" 14 #include "debugfs.h" 15 #include "debugfs_sta.h" 16 #include "sta_info.h" 17 18 /* sta attributtes */ 19 20 #define STA_READ(name, buflen, field, format_string) \ 21 static ssize_t sta_ ##name## _read(struct file *file, \ 22 char __user *userbuf, \ 23 size_t count, loff_t *ppos) \ 24 { \ 25 int res; \ 26 struct sta_info *sta = file->private_data; \ 27 char buf[buflen]; \ 28 res = scnprintf(buf, buflen, format_string, sta->field); \ 29 return simple_read_from_buffer(userbuf, count, ppos, buf, res); \ 30 } 31 #define STA_READ_D(name, field) STA_READ(name, 20, field, "%d\n") 32 #define STA_READ_U(name, field) STA_READ(name, 20, field, "%u\n") 33 #define STA_READ_S(name, field) STA_READ(name, 20, field, "%s\n") 34 35 #define STA_OPS(name) \ 36 static const struct file_operations sta_ ##name## _ops = { \ 37 .read = sta_##name##_read, \ 38 .open = mac80211_open_file_generic, \ 39 } 40 41 #define STA_OPS_RW(name) \ 42 static const struct file_operations sta_ ##name## _ops = { \ 43 .read = sta_##name##_read, \ 44 .write = sta_##name##_write, \ 45 .open = mac80211_open_file_generic, \ 46 } 47 48 #define STA_FILE(name, field, format) \ 49 STA_READ_##format(name, field) \ 50 STA_OPS(name) 51 52 STA_FILE(aid, sta.aid, D); 53 STA_FILE(dev, sdata->name, S); 54 STA_FILE(last_signal, last_signal, D); 55 56 static ssize_t sta_flags_read(struct file *file, char __user *userbuf, 57 size_t count, loff_t *ppos) 58 { 59 char buf[100]; 60 struct sta_info *sta = file->private_data; 61 u32 staflags = get_sta_flags(sta); 62 int res = scnprintf(buf, sizeof(buf), "%s%s%s%s%s%s%s%s%s", 63 staflags & WLAN_STA_AUTH ? "AUTH\n" : "", 64 staflags & WLAN_STA_ASSOC ? "ASSOC\n" : "", 65 staflags & WLAN_STA_PS_STA ? "PS (sta)\n" : "", 66 staflags & WLAN_STA_PS_DRIVER ? "PS (driver)\n" : "", 67 staflags & WLAN_STA_AUTHORIZED ? "AUTHORIZED\n" : "", 68 staflags & WLAN_STA_SHORT_PREAMBLE ? "SHORT PREAMBLE\n" : "", 69 staflags & WLAN_STA_WME ? "WME\n" : "", 70 staflags & WLAN_STA_WDS ? "WDS\n" : "", 71 staflags & WLAN_STA_MFP ? "MFP\n" : ""); 72 return simple_read_from_buffer(userbuf, count, ppos, buf, res); 73 } 74 STA_OPS(flags); 75 76 static ssize_t sta_num_ps_buf_frames_read(struct file *file, 77 char __user *userbuf, 78 size_t count, loff_t *ppos) 79 { 80 char buf[20]; 81 struct sta_info *sta = file->private_data; 82 int res = scnprintf(buf, sizeof(buf), "%u\n", 83 skb_queue_len(&sta->ps_tx_buf)); 84 return simple_read_from_buffer(userbuf, count, ppos, buf, res); 85 } 86 STA_OPS(num_ps_buf_frames); 87 88 static ssize_t sta_inactive_ms_read(struct file *file, char __user *userbuf, 89 size_t count, loff_t *ppos) 90 { 91 char buf[20]; 92 struct sta_info *sta = file->private_data; 93 int res = scnprintf(buf, sizeof(buf), "%d\n", 94 jiffies_to_msecs(jiffies - sta->last_rx)); 95 return simple_read_from_buffer(userbuf, count, ppos, buf, res); 96 } 97 STA_OPS(inactive_ms); 98 99 static ssize_t sta_last_seq_ctrl_read(struct file *file, char __user *userbuf, 100 size_t count, loff_t *ppos) 101 { 102 char buf[15*NUM_RX_DATA_QUEUES], *p = buf; 103 int i; 104 struct sta_info *sta = file->private_data; 105 for (i = 0; i < NUM_RX_DATA_QUEUES; i++) 106 p += scnprintf(p, sizeof(buf)+buf-p, "%x ", 107 le16_to_cpu(sta->last_seq_ctrl[i])); 108 p += scnprintf(p, sizeof(buf)+buf-p, "\n"); 109 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); 110 } 111 STA_OPS(last_seq_ctrl); 112 113 static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf, 114 size_t count, loff_t *ppos) 115 { 116 char buf[71 + STA_TID_NUM * 40], *p = buf; 117 int i; 118 struct sta_info *sta = file->private_data; 119 120 spin_lock_bh(&sta->lock); 121 p += scnprintf(p, sizeof(buf) + buf - p, "next dialog_token: %#02x\n", 122 sta->ampdu_mlme.dialog_token_allocator + 1); 123 p += scnprintf(p, sizeof(buf) + buf - p, 124 "TID\t\tRX active\tDTKN\tSSN\t\tTX\tDTKN\tpending\n"); 125 for (i = 0; i < STA_TID_NUM; i++) { 126 p += scnprintf(p, sizeof(buf) + buf - p, "%02d", i); 127 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", 128 !!sta->ampdu_mlme.tid_rx[i]); 129 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x", 130 sta->ampdu_mlme.tid_rx[i] ? 131 sta->ampdu_mlme.tid_rx[i]->dialog_token : 0); 132 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x", 133 sta->ampdu_mlme.tid_rx[i] ? 134 sta->ampdu_mlme.tid_rx[i]->ssn : 0); 135 136 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", 137 !!sta->ampdu_mlme.tid_tx[i]); 138 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x", 139 sta->ampdu_mlme.tid_tx[i] ? 140 sta->ampdu_mlme.tid_tx[i]->dialog_token : 0); 141 p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d", 142 sta->ampdu_mlme.tid_tx[i] ? 143 skb_queue_len(&sta->ampdu_mlme.tid_tx[i]->pending) : 0); 144 p += scnprintf(p, sizeof(buf) + buf - p, "\n"); 145 } 146 spin_unlock_bh(&sta->lock); 147 148 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); 149 } 150 151 static ssize_t sta_agg_status_write(struct file *file, const char __user *userbuf, 152 size_t count, loff_t *ppos) 153 { 154 char _buf[12], *buf = _buf; 155 struct sta_info *sta = file->private_data; 156 bool start, tx; 157 unsigned long tid; 158 int ret; 159 160 if (count > sizeof(_buf)) 161 return -EINVAL; 162 163 if (copy_from_user(buf, userbuf, count)) 164 return -EFAULT; 165 166 buf[sizeof(_buf) - 1] = '\0'; 167 168 if (strncmp(buf, "tx ", 3) == 0) { 169 buf += 3; 170 tx = true; 171 } else if (strncmp(buf, "rx ", 3) == 0) { 172 buf += 3; 173 tx = false; 174 } else 175 return -EINVAL; 176 177 if (strncmp(buf, "start ", 6) == 0) { 178 buf += 6; 179 start = true; 180 if (!tx) 181 return -EINVAL; 182 } else if (strncmp(buf, "stop ", 5) == 0) { 183 buf += 5; 184 start = false; 185 } else 186 return -EINVAL; 187 188 tid = simple_strtoul(buf, NULL, 0); 189 190 if (tid >= STA_TID_NUM) 191 return -EINVAL; 192 193 if (tx) { 194 if (start) 195 ret = ieee80211_start_tx_ba_session(&sta->sta, tid); 196 else 197 ret = ieee80211_stop_tx_ba_session(&sta->sta, tid); 198 } else { 199 __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT, 3); 200 ret = 0; 201 } 202 203 return ret ?: count; 204 } 205 STA_OPS_RW(agg_status); 206 207 static ssize_t sta_ht_capa_read(struct file *file, char __user *userbuf, 208 size_t count, loff_t *ppos) 209 { 210 #define PRINT_HT_CAP(_cond, _str) \ 211 do { \ 212 if (_cond) \ 213 p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \ 214 } while (0) 215 char buf[512], *p = buf; 216 int i; 217 struct sta_info *sta = file->private_data; 218 struct ieee80211_sta_ht_cap *htc = &sta->sta.ht_cap; 219 220 p += scnprintf(p, sizeof(buf) + buf - p, "ht %ssupported\n", 221 htc->ht_supported ? "" : "not "); 222 if (htc->ht_supported) { 223 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.4x\n", htc->cap); 224 225 PRINT_HT_CAP((htc->cap & BIT(0)), "RX LDPC"); 226 PRINT_HT_CAP((htc->cap & BIT(1)), "HT20/HT40"); 227 PRINT_HT_CAP(!(htc->cap & BIT(1)), "HT20"); 228 229 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 0, "Static SM Power Save"); 230 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 1, "Dynamic SM Power Save"); 231 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 3, "SM Power Save disabled"); 232 233 PRINT_HT_CAP((htc->cap & BIT(4)), "RX Greenfield"); 234 PRINT_HT_CAP((htc->cap & BIT(5)), "RX HT20 SGI"); 235 PRINT_HT_CAP((htc->cap & BIT(6)), "RX HT40 SGI"); 236 PRINT_HT_CAP((htc->cap & BIT(7)), "TX STBC"); 237 238 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 0, "No RX STBC"); 239 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 1, "RX STBC 1-stream"); 240 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 2, "RX STBC 2-streams"); 241 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 3, "RX STBC 3-streams"); 242 243 PRINT_HT_CAP((htc->cap & BIT(10)), "HT Delayed Block Ack"); 244 245 PRINT_HT_CAP((htc->cap & BIT(11)), "Max AMSDU length: " 246 "3839 bytes"); 247 PRINT_HT_CAP(!(htc->cap & BIT(11)), "Max AMSDU length: " 248 "7935 bytes"); 249 250 /* 251 * For beacons and probe response this would mean the BSS 252 * does or does not allow the usage of DSSS/CCK HT40. 253 * Otherwise it means the STA does or does not use 254 * DSSS/CCK HT40. 255 */ 256 PRINT_HT_CAP((htc->cap & BIT(12)), "DSSS/CCK HT40"); 257 PRINT_HT_CAP(!(htc->cap & BIT(12)), "No DSSS/CCK HT40"); 258 259 /* BIT(13) is reserved */ 260 261 PRINT_HT_CAP((htc->cap & BIT(14)), "40 MHz Intolerant"); 262 263 PRINT_HT_CAP((htc->cap & BIT(15)), "L-SIG TXOP protection"); 264 265 p += scnprintf(p, sizeof(buf)+buf-p, "ampdu factor/density: %d/%d\n", 266 htc->ampdu_factor, htc->ampdu_density); 267 p += scnprintf(p, sizeof(buf)+buf-p, "MCS mask:"); 268 269 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) 270 p += scnprintf(p, sizeof(buf)+buf-p, " %.2x", 271 htc->mcs.rx_mask[i]); 272 p += scnprintf(p, sizeof(buf)+buf-p, "\n"); 273 274 /* If not set this is meaningless */ 275 if (le16_to_cpu(htc->mcs.rx_highest)) { 276 p += scnprintf(p, sizeof(buf)+buf-p, 277 "MCS rx highest: %d Mbps\n", 278 le16_to_cpu(htc->mcs.rx_highest)); 279 } 280 281 p += scnprintf(p, sizeof(buf)+buf-p, "MCS tx params: %x\n", 282 htc->mcs.tx_params); 283 } 284 285 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); 286 } 287 STA_OPS(ht_capa); 288 289 #define DEBUGFS_ADD(name) \ 290 debugfs_create_file(#name, 0400, \ 291 sta->debugfs.dir, sta, &sta_ ##name## _ops); 292 293 #define DEBUGFS_ADD_COUNTER(name, field) \ 294 if (sizeof(sta->field) == sizeof(u32)) \ 295 debugfs_create_u32(#name, 0400, sta->debugfs.dir, \ 296 (u32 *) &sta->field); \ 297 else \ 298 debugfs_create_u64(#name, 0400, sta->debugfs.dir, \ 299 (u64 *) &sta->field); 300 301 void ieee80211_sta_debugfs_add(struct sta_info *sta) 302 { 303 struct dentry *stations_dir = sta->local->debugfs.stations; 304 u8 mac[3*ETH_ALEN]; 305 306 sta->debugfs.add_has_run = true; 307 308 if (!stations_dir) 309 return; 310 311 snprintf(mac, sizeof(mac), "%pM", sta->sta.addr); 312 313 /* 314 * This might fail due to a race condition: 315 * When mac80211 unlinks a station, the debugfs entries 316 * remain, but it is already possible to link a new 317 * station with the same address which triggers adding 318 * it to debugfs; therefore, if the old station isn't 319 * destroyed quickly enough the old station's debugfs 320 * dir might still be around. 321 */ 322 sta->debugfs.dir = debugfs_create_dir(mac, stations_dir); 323 if (!sta->debugfs.dir) 324 return; 325 326 DEBUGFS_ADD(flags); 327 DEBUGFS_ADD(num_ps_buf_frames); 328 DEBUGFS_ADD(inactive_ms); 329 DEBUGFS_ADD(last_seq_ctrl); 330 DEBUGFS_ADD(agg_status); 331 DEBUGFS_ADD(dev); 332 DEBUGFS_ADD(last_signal); 333 DEBUGFS_ADD(ht_capa); 334 335 DEBUGFS_ADD_COUNTER(rx_packets, rx_packets); 336 DEBUGFS_ADD_COUNTER(tx_packets, tx_packets); 337 DEBUGFS_ADD_COUNTER(rx_bytes, rx_bytes); 338 DEBUGFS_ADD_COUNTER(tx_bytes, tx_bytes); 339 DEBUGFS_ADD_COUNTER(rx_duplicates, num_duplicates); 340 DEBUGFS_ADD_COUNTER(rx_fragments, rx_fragments); 341 DEBUGFS_ADD_COUNTER(rx_dropped, rx_dropped); 342 DEBUGFS_ADD_COUNTER(tx_fragments, tx_fragments); 343 DEBUGFS_ADD_COUNTER(tx_filtered, tx_filtered_count); 344 DEBUGFS_ADD_COUNTER(tx_retry_failed, tx_retry_failed); 345 DEBUGFS_ADD_COUNTER(tx_retry_count, tx_retry_count); 346 DEBUGFS_ADD_COUNTER(wep_weak_iv_count, wep_weak_iv_count); 347 } 348 349 void ieee80211_sta_debugfs_remove(struct sta_info *sta) 350 { 351 debugfs_remove_recursive(sta->debugfs.dir); 352 sta->debugfs.dir = NULL; 353 } 354