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_LU(name, field) STA_READ(name, 20, field, "%lu\n") 34 #define STA_READ_S(name, field) STA_READ(name, 20, field, "%s\n") 35 36 #define STA_OPS(name) \ 37 static const struct file_operations sta_ ##name## _ops = { \ 38 .read = sta_##name##_read, \ 39 .open = mac80211_open_file_generic, \ 40 } 41 42 #define STA_OPS_RW(name) \ 43 static const struct file_operations sta_ ##name## _ops = { \ 44 .read = sta_##name##_read, \ 45 .write = sta_##name##_write, \ 46 .open = mac80211_open_file_generic, \ 47 } 48 49 #define STA_FILE(name, field, format) \ 50 STA_READ_##format(name, field) \ 51 STA_OPS(name) 52 53 STA_FILE(aid, sta.aid, D); 54 STA_FILE(dev, sdata->name, S); 55 STA_FILE(rx_packets, rx_packets, LU); 56 STA_FILE(tx_packets, tx_packets, LU); 57 STA_FILE(rx_bytes, rx_bytes, LU); 58 STA_FILE(tx_bytes, tx_bytes, LU); 59 STA_FILE(rx_duplicates, num_duplicates, LU); 60 STA_FILE(rx_fragments, rx_fragments, LU); 61 STA_FILE(rx_dropped, rx_dropped, LU); 62 STA_FILE(tx_fragments, tx_fragments, LU); 63 STA_FILE(tx_filtered, tx_filtered_count, LU); 64 STA_FILE(tx_retry_failed, tx_retry_failed, LU); 65 STA_FILE(tx_retry_count, tx_retry_count, LU); 66 STA_FILE(last_signal, last_signal, D); 67 STA_FILE(wep_weak_iv_count, wep_weak_iv_count, LU); 68 69 static ssize_t sta_flags_read(struct file *file, char __user *userbuf, 70 size_t count, loff_t *ppos) 71 { 72 char buf[100]; 73 struct sta_info *sta = file->private_data; 74 u32 staflags = get_sta_flags(sta); 75 int res = scnprintf(buf, sizeof(buf), "%s%s%s%s%s%s%s%s%s", 76 staflags & WLAN_STA_AUTH ? "AUTH\n" : "", 77 staflags & WLAN_STA_ASSOC ? "ASSOC\n" : "", 78 staflags & WLAN_STA_PS_STA ? "PS (sta)\n" : "", 79 staflags & WLAN_STA_PS_DRIVER ? "PS (driver)\n" : "", 80 staflags & WLAN_STA_AUTHORIZED ? "AUTHORIZED\n" : "", 81 staflags & WLAN_STA_SHORT_PREAMBLE ? "SHORT PREAMBLE\n" : "", 82 staflags & WLAN_STA_WME ? "WME\n" : "", 83 staflags & WLAN_STA_WDS ? "WDS\n" : "", 84 staflags & WLAN_STA_MFP ? "MFP\n" : ""); 85 return simple_read_from_buffer(userbuf, count, ppos, buf, res); 86 } 87 STA_OPS(flags); 88 89 static ssize_t sta_num_ps_buf_frames_read(struct file *file, 90 char __user *userbuf, 91 size_t count, loff_t *ppos) 92 { 93 char buf[20]; 94 struct sta_info *sta = file->private_data; 95 int res = scnprintf(buf, sizeof(buf), "%u\n", 96 skb_queue_len(&sta->ps_tx_buf)); 97 return simple_read_from_buffer(userbuf, count, ppos, buf, res); 98 } 99 STA_OPS(num_ps_buf_frames); 100 101 static ssize_t sta_inactive_ms_read(struct file *file, char __user *userbuf, 102 size_t count, loff_t *ppos) 103 { 104 char buf[20]; 105 struct sta_info *sta = file->private_data; 106 int res = scnprintf(buf, sizeof(buf), "%d\n", 107 jiffies_to_msecs(jiffies - sta->last_rx)); 108 return simple_read_from_buffer(userbuf, count, ppos, buf, res); 109 } 110 STA_OPS(inactive_ms); 111 112 static ssize_t sta_last_seq_ctrl_read(struct file *file, char __user *userbuf, 113 size_t count, loff_t *ppos) 114 { 115 char buf[15*NUM_RX_DATA_QUEUES], *p = buf; 116 int i; 117 struct sta_info *sta = file->private_data; 118 for (i = 0; i < NUM_RX_DATA_QUEUES; i++) 119 p += scnprintf(p, sizeof(buf)+buf-p, "%x ", 120 le16_to_cpu(sta->last_seq_ctrl[i])); 121 p += scnprintf(p, sizeof(buf)+buf-p, "\n"); 122 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); 123 } 124 STA_OPS(last_seq_ctrl); 125 126 static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf, 127 size_t count, loff_t *ppos) 128 { 129 char buf[71 + STA_TID_NUM * 40], *p = buf; 130 int i; 131 struct sta_info *sta = file->private_data; 132 133 spin_lock_bh(&sta->lock); 134 p += scnprintf(p, sizeof(buf) + buf - p, "next dialog_token: %#02x\n", 135 sta->ampdu_mlme.dialog_token_allocator + 1); 136 p += scnprintf(p, sizeof(buf) + buf - p, 137 "TID\t\tRX active\tDTKN\tSSN\t\tTX\tDTKN\tSSN\tpending\n"); 138 for (i = 0; i < STA_TID_NUM; i++) { 139 p += scnprintf(p, sizeof(buf) + buf - p, "%02d", i); 140 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", 141 sta->ampdu_mlme.tid_active_rx[i]); 142 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x", 143 sta->ampdu_mlme.tid_active_rx[i] ? 144 sta->ampdu_mlme.tid_rx[i]->dialog_token : 0); 145 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x", 146 sta->ampdu_mlme.tid_active_rx[i] ? 147 sta->ampdu_mlme.tid_rx[i]->ssn : 0); 148 149 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", 150 sta->ampdu_mlme.tid_state_tx[i]); 151 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x", 152 sta->ampdu_mlme.tid_state_tx[i] ? 153 sta->ampdu_mlme.tid_tx[i]->dialog_token : 0); 154 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x", 155 sta->ampdu_mlme.tid_state_tx[i] ? 156 sta->ampdu_mlme.tid_tx[i]->ssn : 0); 157 p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d", 158 sta->ampdu_mlme.tid_state_tx[i] ? 159 skb_queue_len(&sta->ampdu_mlme.tid_tx[i]->pending) : 0); 160 p += scnprintf(p, sizeof(buf) + buf - p, "\n"); 161 } 162 spin_unlock_bh(&sta->lock); 163 164 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); 165 } 166 167 static ssize_t sta_agg_status_write(struct file *file, const char __user *userbuf, 168 size_t count, loff_t *ppos) 169 { 170 char _buf[12], *buf = _buf; 171 struct sta_info *sta = file->private_data; 172 bool start, tx; 173 unsigned long tid; 174 int ret; 175 176 if (count > sizeof(_buf)) 177 return -EINVAL; 178 179 if (copy_from_user(buf, userbuf, count)) 180 return -EFAULT; 181 182 buf[sizeof(_buf) - 1] = '\0'; 183 184 if (strncmp(buf, "tx ", 3) == 0) { 185 buf += 3; 186 tx = true; 187 } else if (strncmp(buf, "rx ", 3) == 0) { 188 buf += 3; 189 tx = false; 190 } else 191 return -EINVAL; 192 193 if (strncmp(buf, "start ", 6) == 0) { 194 buf += 6; 195 start = true; 196 if (!tx) 197 return -EINVAL; 198 } else if (strncmp(buf, "stop ", 5) == 0) { 199 buf += 5; 200 start = false; 201 } else 202 return -EINVAL; 203 204 tid = simple_strtoul(buf, NULL, 0); 205 206 if (tid >= STA_TID_NUM) 207 return -EINVAL; 208 209 if (tx) { 210 if (start) 211 ret = ieee80211_start_tx_ba_session(&sta->sta, tid); 212 else 213 ret = ieee80211_stop_tx_ba_session(&sta->sta, tid, 214 WLAN_BACK_RECIPIENT); 215 } else { 216 __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT, 3); 217 ret = 0; 218 } 219 220 return ret ?: count; 221 } 222 STA_OPS_RW(agg_status); 223 224 static ssize_t sta_ht_capa_read(struct file *file, char __user *userbuf, 225 size_t count, loff_t *ppos) 226 { 227 #define PRINT_HT_CAP(_cond, _str) \ 228 do { \ 229 if (_cond) \ 230 p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \ 231 } while (0) 232 char buf[512], *p = buf; 233 int i; 234 struct sta_info *sta = file->private_data; 235 struct ieee80211_sta_ht_cap *htc = &sta->sta.ht_cap; 236 237 p += scnprintf(p, sizeof(buf) + buf - p, "ht %ssupported\n", 238 htc->ht_supported ? "" : "not "); 239 if (htc->ht_supported) { 240 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.4x\n", htc->cap); 241 242 PRINT_HT_CAP((htc->cap & BIT(0)), "RX LDPC"); 243 PRINT_HT_CAP((htc->cap & BIT(1)), "HT20/HT40"); 244 PRINT_HT_CAP(!(htc->cap & BIT(1)), "HT20"); 245 246 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 0, "Static SM Power Save"); 247 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 1, "Dynamic SM Power Save"); 248 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 3, "SM Power Save disabled"); 249 250 PRINT_HT_CAP((htc->cap & BIT(4)), "RX Greenfield"); 251 PRINT_HT_CAP((htc->cap & BIT(5)), "RX HT20 SGI"); 252 PRINT_HT_CAP((htc->cap & BIT(6)), "RX HT40 SGI"); 253 PRINT_HT_CAP((htc->cap & BIT(7)), "TX STBC"); 254 255 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 0, "No RX STBC"); 256 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 1, "RX STBC 1-stream"); 257 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 2, "RX STBC 2-streams"); 258 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 3, "RX STBC 3-streams"); 259 260 PRINT_HT_CAP((htc->cap & BIT(10)), "HT Delayed Block Ack"); 261 262 PRINT_HT_CAP((htc->cap & BIT(11)), "Max AMSDU length: " 263 "3839 bytes"); 264 PRINT_HT_CAP(!(htc->cap & BIT(11)), "Max AMSDU length: " 265 "7935 bytes"); 266 267 /* 268 * For beacons and probe response this would mean the BSS 269 * does or does not allow the usage of DSSS/CCK HT40. 270 * Otherwise it means the STA does or does not use 271 * DSSS/CCK HT40. 272 */ 273 PRINT_HT_CAP((htc->cap & BIT(12)), "DSSS/CCK HT40"); 274 PRINT_HT_CAP(!(htc->cap & BIT(12)), "No DSSS/CCK HT40"); 275 276 /* BIT(13) is reserved */ 277 278 PRINT_HT_CAP((htc->cap & BIT(14)), "40 MHz Intolerant"); 279 280 PRINT_HT_CAP((htc->cap & BIT(15)), "L-SIG TXOP protection"); 281 282 p += scnprintf(p, sizeof(buf)+buf-p, "ampdu factor/density: %d/%d\n", 283 htc->ampdu_factor, htc->ampdu_density); 284 p += scnprintf(p, sizeof(buf)+buf-p, "MCS mask:"); 285 286 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) 287 p += scnprintf(p, sizeof(buf)+buf-p, " %.2x", 288 htc->mcs.rx_mask[i]); 289 p += scnprintf(p, sizeof(buf)+buf-p, "\n"); 290 291 /* If not set this is meaningless */ 292 if (le16_to_cpu(htc->mcs.rx_highest)) { 293 p += scnprintf(p, sizeof(buf)+buf-p, 294 "MCS rx highest: %d Mbps\n", 295 le16_to_cpu(htc->mcs.rx_highest)); 296 } 297 298 p += scnprintf(p, sizeof(buf)+buf-p, "MCS tx params: %x\n", 299 htc->mcs.tx_params); 300 } 301 302 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); 303 } 304 STA_OPS(ht_capa); 305 306 #define DEBUGFS_ADD(name) \ 307 debugfs_create_file(#name, 0400, \ 308 sta->debugfs.dir, sta, &sta_ ##name## _ops); 309 310 311 void ieee80211_sta_debugfs_add(struct sta_info *sta) 312 { 313 struct dentry *stations_dir = sta->local->debugfs.stations; 314 u8 mac[3*ETH_ALEN]; 315 316 sta->debugfs.add_has_run = true; 317 318 if (!stations_dir) 319 return; 320 321 snprintf(mac, sizeof(mac), "%pM", sta->sta.addr); 322 323 /* 324 * This might fail due to a race condition: 325 * When mac80211 unlinks a station, the debugfs entries 326 * remain, but it is already possible to link a new 327 * station with the same address which triggers adding 328 * it to debugfs; therefore, if the old station isn't 329 * destroyed quickly enough the old station's debugfs 330 * dir might still be around. 331 */ 332 sta->debugfs.dir = debugfs_create_dir(mac, stations_dir); 333 if (!sta->debugfs.dir) 334 return; 335 336 DEBUGFS_ADD(flags); 337 DEBUGFS_ADD(num_ps_buf_frames); 338 DEBUGFS_ADD(inactive_ms); 339 DEBUGFS_ADD(last_seq_ctrl); 340 DEBUGFS_ADD(agg_status); 341 DEBUGFS_ADD(dev); 342 DEBUGFS_ADD(rx_packets); 343 DEBUGFS_ADD(tx_packets); 344 DEBUGFS_ADD(rx_bytes); 345 DEBUGFS_ADD(tx_bytes); 346 DEBUGFS_ADD(rx_duplicates); 347 DEBUGFS_ADD(rx_fragments); 348 DEBUGFS_ADD(rx_dropped); 349 DEBUGFS_ADD(tx_fragments); 350 DEBUGFS_ADD(tx_filtered); 351 DEBUGFS_ADD(tx_retry_failed); 352 DEBUGFS_ADD(tx_retry_count); 353 DEBUGFS_ADD(last_signal); 354 DEBUGFS_ADD(wep_weak_iv_count); 355 DEBUGFS_ADD(ht_capa); 356 } 357 358 void ieee80211_sta_debugfs_remove(struct sta_info *sta) 359 { 360 debugfs_remove_recursive(sta->debugfs.dir); 361 sta->debugfs.dir = NULL; 362 } 363