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 .llseek = generic_file_llseek, \ 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 .llseek = generic_file_llseek, \ 48 } 49 50 #define STA_FILE(name, field, format) \ 51 STA_READ_##format(name, field) \ 52 STA_OPS(name) 53 54 STA_FILE(aid, sta.aid, D); 55 STA_FILE(dev, sdata->name, S); 56 STA_FILE(last_signal, last_signal, D); 57 58 static ssize_t sta_flags_read(struct file *file, char __user *userbuf, 59 size_t count, loff_t *ppos) 60 { 61 char buf[100]; 62 struct sta_info *sta = file->private_data; 63 u32 staflags = get_sta_flags(sta); 64 int res = scnprintf(buf, sizeof(buf), "%s%s%s%s%s%s%s%s%s", 65 staflags & WLAN_STA_AUTH ? "AUTH\n" : "", 66 staflags & WLAN_STA_ASSOC ? "ASSOC\n" : "", 67 staflags & WLAN_STA_PS_STA ? "PS (sta)\n" : "", 68 staflags & WLAN_STA_PS_DRIVER ? "PS (driver)\n" : "", 69 staflags & WLAN_STA_AUTHORIZED ? "AUTHORIZED\n" : "", 70 staflags & WLAN_STA_SHORT_PREAMBLE ? "SHORT PREAMBLE\n" : "", 71 staflags & WLAN_STA_WME ? "WME\n" : "", 72 staflags & WLAN_STA_WDS ? "WDS\n" : "", 73 staflags & WLAN_STA_MFP ? "MFP\n" : ""); 74 return simple_read_from_buffer(userbuf, count, ppos, buf, res); 75 } 76 STA_OPS(flags); 77 78 static ssize_t sta_num_ps_buf_frames_read(struct file *file, 79 char __user *userbuf, 80 size_t count, loff_t *ppos) 81 { 82 char buf[20]; 83 struct sta_info *sta = file->private_data; 84 int res = scnprintf(buf, sizeof(buf), "%u\n", 85 skb_queue_len(&sta->ps_tx_buf)); 86 return simple_read_from_buffer(userbuf, count, ppos, buf, res); 87 } 88 STA_OPS(num_ps_buf_frames); 89 90 static ssize_t sta_inactive_ms_read(struct file *file, 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), "%d\n", 96 jiffies_to_msecs(jiffies - sta->last_rx)); 97 return simple_read_from_buffer(userbuf, count, ppos, buf, res); 98 } 99 STA_OPS(inactive_ms); 100 101 static ssize_t sta_last_seq_ctrl_read(struct file *file, char __user *userbuf, 102 size_t count, loff_t *ppos) 103 { 104 char buf[15*NUM_RX_DATA_QUEUES], *p = buf; 105 int i; 106 struct sta_info *sta = file->private_data; 107 for (i = 0; i < NUM_RX_DATA_QUEUES; i++) 108 p += scnprintf(p, sizeof(buf)+buf-p, "%x ", 109 le16_to_cpu(sta->last_seq_ctrl[i])); 110 p += scnprintf(p, sizeof(buf)+buf-p, "\n"); 111 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); 112 } 113 STA_OPS(last_seq_ctrl); 114 115 static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf, 116 size_t count, loff_t *ppos) 117 { 118 char buf[71 + STA_TID_NUM * 40], *p = buf; 119 int i; 120 struct sta_info *sta = file->private_data; 121 122 spin_lock_bh(&sta->lock); 123 p += scnprintf(p, sizeof(buf) + buf - p, "next dialog_token: %#02x\n", 124 sta->ampdu_mlme.dialog_token_allocator + 1); 125 p += scnprintf(p, sizeof(buf) + buf - p, 126 "TID\t\tRX active\tDTKN\tSSN\t\tTX\tDTKN\tpending\n"); 127 for (i = 0; i < STA_TID_NUM; i++) { 128 p += scnprintf(p, sizeof(buf) + buf - p, "%02d", i); 129 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", 130 !!sta->ampdu_mlme.tid_rx[i]); 131 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x", 132 sta->ampdu_mlme.tid_rx[i] ? 133 sta->ampdu_mlme.tid_rx[i]->dialog_token : 0); 134 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x", 135 sta->ampdu_mlme.tid_rx[i] ? 136 sta->ampdu_mlme.tid_rx[i]->ssn : 0); 137 138 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", 139 !!sta->ampdu_mlme.tid_tx[i]); 140 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x", 141 sta->ampdu_mlme.tid_tx[i] ? 142 sta->ampdu_mlme.tid_tx[i]->dialog_token : 0); 143 p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d", 144 sta->ampdu_mlme.tid_tx[i] ? 145 skb_queue_len(&sta->ampdu_mlme.tid_tx[i]->pending) : 0); 146 p += scnprintf(p, sizeof(buf) + buf - p, "\n"); 147 } 148 spin_unlock_bh(&sta->lock); 149 150 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); 151 } 152 153 static ssize_t sta_agg_status_write(struct file *file, const char __user *userbuf, 154 size_t count, loff_t *ppos) 155 { 156 char _buf[12], *buf = _buf; 157 struct sta_info *sta = file->private_data; 158 bool start, tx; 159 unsigned long tid; 160 int ret; 161 162 if (count > sizeof(_buf)) 163 return -EINVAL; 164 165 if (copy_from_user(buf, userbuf, count)) 166 return -EFAULT; 167 168 buf[sizeof(_buf) - 1] = '\0'; 169 170 if (strncmp(buf, "tx ", 3) == 0) { 171 buf += 3; 172 tx = true; 173 } else if (strncmp(buf, "rx ", 3) == 0) { 174 buf += 3; 175 tx = false; 176 } else 177 return -EINVAL; 178 179 if (strncmp(buf, "start ", 6) == 0) { 180 buf += 6; 181 start = true; 182 if (!tx) 183 return -EINVAL; 184 } else if (strncmp(buf, "stop ", 5) == 0) { 185 buf += 5; 186 start = false; 187 } else 188 return -EINVAL; 189 190 tid = simple_strtoul(buf, NULL, 0); 191 192 if (tid >= STA_TID_NUM) 193 return -EINVAL; 194 195 if (tx) { 196 if (start) 197 ret = ieee80211_start_tx_ba_session(&sta->sta, tid); 198 else 199 ret = ieee80211_stop_tx_ba_session(&sta->sta, tid); 200 } else { 201 __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT, 3); 202 ret = 0; 203 } 204 205 return ret ?: count; 206 } 207 STA_OPS_RW(agg_status); 208 209 static ssize_t sta_ht_capa_read(struct file *file, char __user *userbuf, 210 size_t count, loff_t *ppos) 211 { 212 #define PRINT_HT_CAP(_cond, _str) \ 213 do { \ 214 if (_cond) \ 215 p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \ 216 } while (0) 217 char buf[512], *p = buf; 218 int i; 219 struct sta_info *sta = file->private_data; 220 struct ieee80211_sta_ht_cap *htc = &sta->sta.ht_cap; 221 222 p += scnprintf(p, sizeof(buf) + buf - p, "ht %ssupported\n", 223 htc->ht_supported ? "" : "not "); 224 if (htc->ht_supported) { 225 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.4x\n", htc->cap); 226 227 PRINT_HT_CAP((htc->cap & BIT(0)), "RX LDPC"); 228 PRINT_HT_CAP((htc->cap & BIT(1)), "HT20/HT40"); 229 PRINT_HT_CAP(!(htc->cap & BIT(1)), "HT20"); 230 231 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 0, "Static SM Power Save"); 232 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 1, "Dynamic SM Power Save"); 233 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 3, "SM Power Save disabled"); 234 235 PRINT_HT_CAP((htc->cap & BIT(4)), "RX Greenfield"); 236 PRINT_HT_CAP((htc->cap & BIT(5)), "RX HT20 SGI"); 237 PRINT_HT_CAP((htc->cap & BIT(6)), "RX HT40 SGI"); 238 PRINT_HT_CAP((htc->cap & BIT(7)), "TX STBC"); 239 240 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 0, "No RX STBC"); 241 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 1, "RX STBC 1-stream"); 242 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 2, "RX STBC 2-streams"); 243 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 3, "RX STBC 3-streams"); 244 245 PRINT_HT_CAP((htc->cap & BIT(10)), "HT Delayed Block Ack"); 246 247 PRINT_HT_CAP((htc->cap & BIT(11)), "Max AMSDU length: " 248 "3839 bytes"); 249 PRINT_HT_CAP(!(htc->cap & BIT(11)), "Max AMSDU length: " 250 "7935 bytes"); 251 252 /* 253 * For beacons and probe response this would mean the BSS 254 * does or does not allow the usage of DSSS/CCK HT40. 255 * Otherwise it means the STA does or does not use 256 * DSSS/CCK HT40. 257 */ 258 PRINT_HT_CAP((htc->cap & BIT(12)), "DSSS/CCK HT40"); 259 PRINT_HT_CAP(!(htc->cap & BIT(12)), "No DSSS/CCK HT40"); 260 261 /* BIT(13) is reserved */ 262 263 PRINT_HT_CAP((htc->cap & BIT(14)), "40 MHz Intolerant"); 264 265 PRINT_HT_CAP((htc->cap & BIT(15)), "L-SIG TXOP protection"); 266 267 p += scnprintf(p, sizeof(buf)+buf-p, "ampdu factor/density: %d/%d\n", 268 htc->ampdu_factor, htc->ampdu_density); 269 p += scnprintf(p, sizeof(buf)+buf-p, "MCS mask:"); 270 271 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) 272 p += scnprintf(p, sizeof(buf)+buf-p, " %.2x", 273 htc->mcs.rx_mask[i]); 274 p += scnprintf(p, sizeof(buf)+buf-p, "\n"); 275 276 /* If not set this is meaningless */ 277 if (le16_to_cpu(htc->mcs.rx_highest)) { 278 p += scnprintf(p, sizeof(buf)+buf-p, 279 "MCS rx highest: %d Mbps\n", 280 le16_to_cpu(htc->mcs.rx_highest)); 281 } 282 283 p += scnprintf(p, sizeof(buf)+buf-p, "MCS tx params: %x\n", 284 htc->mcs.tx_params); 285 } 286 287 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); 288 } 289 STA_OPS(ht_capa); 290 291 #define DEBUGFS_ADD(name) \ 292 debugfs_create_file(#name, 0400, \ 293 sta->debugfs.dir, sta, &sta_ ##name## _ops); 294 295 #define DEBUGFS_ADD_COUNTER(name, field) \ 296 if (sizeof(sta->field) == sizeof(u32)) \ 297 debugfs_create_u32(#name, 0400, sta->debugfs.dir, \ 298 (u32 *) &sta->field); \ 299 else \ 300 debugfs_create_u64(#name, 0400, sta->debugfs.dir, \ 301 (u64 *) &sta->field); 302 303 void ieee80211_sta_debugfs_add(struct sta_info *sta) 304 { 305 struct dentry *stations_dir = sta->local->debugfs.stations; 306 u8 mac[3*ETH_ALEN]; 307 308 sta->debugfs.add_has_run = true; 309 310 if (!stations_dir) 311 return; 312 313 snprintf(mac, sizeof(mac), "%pM", sta->sta.addr); 314 315 /* 316 * This might fail due to a race condition: 317 * When mac80211 unlinks a station, the debugfs entries 318 * remain, but it is already possible to link a new 319 * station with the same address which triggers adding 320 * it to debugfs; therefore, if the old station isn't 321 * destroyed quickly enough the old station's debugfs 322 * dir might still be around. 323 */ 324 sta->debugfs.dir = debugfs_create_dir(mac, stations_dir); 325 if (!sta->debugfs.dir) 326 return; 327 328 DEBUGFS_ADD(flags); 329 DEBUGFS_ADD(num_ps_buf_frames); 330 DEBUGFS_ADD(inactive_ms); 331 DEBUGFS_ADD(last_seq_ctrl); 332 DEBUGFS_ADD(agg_status); 333 DEBUGFS_ADD(dev); 334 DEBUGFS_ADD(last_signal); 335 DEBUGFS_ADD(ht_capa); 336 337 DEBUGFS_ADD_COUNTER(rx_packets, rx_packets); 338 DEBUGFS_ADD_COUNTER(tx_packets, tx_packets); 339 DEBUGFS_ADD_COUNTER(rx_bytes, rx_bytes); 340 DEBUGFS_ADD_COUNTER(tx_bytes, tx_bytes); 341 DEBUGFS_ADD_COUNTER(rx_duplicates, num_duplicates); 342 DEBUGFS_ADD_COUNTER(rx_fragments, rx_fragments); 343 DEBUGFS_ADD_COUNTER(rx_dropped, rx_dropped); 344 DEBUGFS_ADD_COUNTER(tx_fragments, tx_fragments); 345 DEBUGFS_ADD_COUNTER(tx_filtered, tx_filtered_count); 346 DEBUGFS_ADD_COUNTER(tx_retry_failed, tx_retry_failed); 347 DEBUGFS_ADD_COUNTER(tx_retry_count, tx_retry_count); 348 DEBUGFS_ADD_COUNTER(wep_weak_iv_count, wep_weak_iv_count); 349 } 350 351 void ieee80211_sta_debugfs_remove(struct sta_info *sta) 352 { 353 debugfs_remove_recursive(sta->debugfs.dir); 354 sta->debugfs.dir = NULL; 355 } 356