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