net/mac80211/debugfs_netdev.c

   1 /*
   2  * Copyright (c) 2006   Jiri Benc <jbenc@suse.cz>
   3  * Copyright 2007       Johannes Berg <johannes@sipsolutions.net>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  */
   9
  10 #include <linux/kernel.h>
  11 #include <linux/device.h>
  12 #include <linux/if.h>
  13 #include <linux/interrupt.h>
  14 #include <linux/netdevice.h>
  15 #include <linux/rtnetlink.h>
  16 #include <linux/notifier.h>
  17 #include <net/mac80211.h>
  18 #include <net/cfg80211.h>
  19 #include "ieee80211_i.h"
  20 #include "rate.h"
  21 #include "debugfs.h"
  22 #include "debugfs_netdev.h"
  23
  24 static ssize_t ieee80211_if_read(
  25         struct ieee80211_sub_if_data *sdata,
  26         char __user *userbuf,
  27         size_t count, loff_t *ppos,
  28         ssize_t (*format)(const struct ieee80211_sub_if_data *, char *, int))
  29 {
  30         char buf[70];
  31         ssize_t ret = -EINVAL;
  32
  33         read_lock(&dev_base_lock);
  34         if (sdata->dev->reg_state == NETREG_REGISTERED)
  35                 ret = (*format)(sdata, buf, sizeof(buf));
  36         read_unlock(&dev_base_lock);
  37
  38         if (ret != -EINVAL)
  39                 ret = simple_read_from_buffer(userbuf, count, ppos, buf, ret);
  40
  41         return ret;
  42 }
  43
  44 #ifdef CONFIG_MAC80211_MESH
  45 static ssize_t ieee80211_if_write(
  46         struct ieee80211_sub_if_data *sdata,
  47         char const __user *userbuf,
  48         size_t count, loff_t *ppos,
  49         int (*format)(struct ieee80211_sub_if_data *, char *))
  50 {
  51         char buf[10];
  52         int buf_size;
  53
  54         memset(buf, 0x00, sizeof(buf));
  55         buf_size = min(count, (sizeof(buf)-1));
  56         if (copy_from_user(buf, userbuf, buf_size))
  57                 return count;
  58         read_lock(&dev_base_lock);
  59         if (sdata->dev->reg_state == NETREG_REGISTERED)
  60                 (*format)(sdata, buf);
  61         read_unlock(&dev_base_lock);
  62
  63         return count;
  64 }
  65 #endif
  66
  67 #define IEEE80211_IF_FMT(name, field, format_string)                    \
  68 static ssize_t ieee80211_if_fmt_##name(                                 \
  69         const struct ieee80211_sub_if_data *sdata, char *buf,           \
  70         int buflen)                                                     \
  71 {                                                                       \
  72         return scnprintf(buf, buflen, format_string, sdata->field);     \
  73 }
  74 #define IEEE80211_IF_WFMT(name, field, type)                            \
  75 static int ieee80211_if_wfmt_##name(                                    \
  76         struct ieee80211_sub_if_data *sdata, char *buf)                 \
  77 {                                                                       \
  78         unsigned long tmp;                                              \
  79         char *endp;                                                     \
  80                                                                         \
  81         tmp = simple_strtoul(buf, &endp, 0);                            \
  82         if ((endp == buf) || ((type)tmp != tmp))                        \
  83                 return -EINVAL;                                         \
  84         sdata->field = tmp;                                             \
  85         return 0;                                                       \
  86 }
  87 #define IEEE80211_IF_FMT_DEC(name, field)                               \
  88                 IEEE80211_IF_FMT(name, field, "%d\n")
  89 #define IEEE80211_IF_FMT_HEX(name, field)                               \
  90                 IEEE80211_IF_FMT(name, field, "%#x\n")
  91 #define IEEE80211_IF_FMT_SIZE(name, field)                              \
  92                 IEEE80211_IF_FMT(name, field, "%zd\n")
  93
  94 #define IEEE80211_IF_FMT_ATOMIC(name, field)                            \
  95 static ssize_t ieee80211_if_fmt_##name(                                 \
  96         const struct ieee80211_sub_if_data *sdata,                      \
  97         char *buf, int buflen)                                          \
  98 {                                                                       \
  99         return scnprintf(buf, buflen, "%d\n", atomic_read(&sdata->field));\
 100 }
 101
 102 #define IEEE80211_IF_FMT_MAC(name, field)                               \
 103 static ssize_t ieee80211_if_fmt_##name(                                 \
 104         const struct ieee80211_sub_if_data *sdata, char *buf,           \
 105         int buflen)                                                     \
 106 {                                                                       \
 107         DECLARE_MAC_BUF(mac);                                           \
 108         return scnprintf(buf, buflen, "%s\n", print_mac(mac, sdata->field));\
 109 }
 110
 111 #define __IEEE80211_IF_FILE(name)                                       \
 112 static ssize_t ieee80211_if_read_##name(struct file *file,              \
 113                                         char __user *userbuf,           \
 114                                         size_t count, loff_t *ppos)     \
 115 {                                                                       \
 116         return ieee80211_if_read(file->private_data,                    \
 117                                  userbuf, count, ppos,                  \
 118                                  ieee80211_if_fmt_##name);              \
 119 }                                                                       \
 120 static const struct file_operations name##_ops = {                      \
 121         .read = ieee80211_if_read_##name,                               \
 122         .open = mac80211_open_file_generic,                             \
 123 }
 124
 125 #define IEEE80211_IF_FILE(name, field, format)                          \
 126                 IEEE80211_IF_FMT_##format(name, field)                  \
 127                 __IEEE80211_IF_FILE(name)
 128
 129 #define __IEEE80211_IF_WFILE(name)                                      \
 130 static ssize_t ieee80211_if_read_##name(struct file *file,              \
 131                                         char __user *userbuf,           \
 132                                         size_t count, loff_t *ppos)     \
 133 {                                                                       \
 134         return ieee80211_if_read(file->private_data,                    \
 135                                  userbuf, count, ppos,                  \
 136                                  ieee80211_if_fmt_##name);              \
 137 }                                                                       \
 138 static ssize_t ieee80211_if_write_##name(struct file *file,             \
 139                                         const char __user *userbuf,     \
 140                                         size_t count, loff_t *ppos)     \
 141 {                                                                       \
 142         return ieee80211_if_write(file->private_data,                   \
 143                                  userbuf, count, ppos,                  \
 144                                  ieee80211_if_wfmt_##name);             \
 145 }                                                                       \
 146 static const struct file_operations name##_ops = {                      \
 147         .read = ieee80211_if_read_##name,                               \
 148         .write = ieee80211_if_write_##name,                             \
 149         .open = mac80211_open_file_generic,                             \
 150 }
 151
 152 #define IEEE80211_IF_WFILE(name, field, format, type)                   \
 153                 IEEE80211_IF_FMT_##format(name, field)                  \
 154                 IEEE80211_IF_WFMT(name, field, type)                    \
 155                 __IEEE80211_IF_WFILE(name)
 156
 157 /* common attributes */
 158 IEEE80211_IF_FILE(drop_unencrypted, drop_unencrypted, DEC);
 159 IEEE80211_IF_FILE(force_unicast_rateidx, force_unicast_rateidx, DEC);
 160 IEEE80211_IF_FILE(max_ratectrl_rateidx, max_ratectrl_rateidx, DEC);
 161
 162 /* STA/IBSS attributes */
 163 IEEE80211_IF_FILE(state, u.sta.state, DEC);
 164 IEEE80211_IF_FILE(bssid, u.sta.bssid, MAC);
 165 IEEE80211_IF_FILE(prev_bssid, u.sta.prev_bssid, MAC);
 166 IEEE80211_IF_FILE(ssid_len, u.sta.ssid_len, SIZE);
 167 IEEE80211_IF_FILE(aid, u.sta.aid, DEC);
 168 IEEE80211_IF_FILE(ap_capab, u.sta.ap_capab, HEX);
 169 IEEE80211_IF_FILE(capab, u.sta.capab, HEX);
 170 IEEE80211_IF_FILE(extra_ie_len, u.sta.extra_ie_len, SIZE);
 171 IEEE80211_IF_FILE(auth_tries, u.sta.auth_tries, DEC);
 172 IEEE80211_IF_FILE(assoc_tries, u.sta.assoc_tries, DEC);
 173 IEEE80211_IF_FILE(auth_algs, u.sta.auth_algs, HEX);
 174 IEEE80211_IF_FILE(auth_alg, u.sta.auth_alg, DEC);
 175 IEEE80211_IF_FILE(auth_transaction, u.sta.auth_transaction, DEC);
 176 IEEE80211_IF_FILE(num_beacons_sta, u.sta.num_beacons, DEC);
 177
 178 static ssize_t ieee80211_if_fmt_flags(
 179         const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
 180 {
 181         return scnprintf(buf, buflen, "%s%s%s%s%s%s%s\n",
 182                  sdata->u.sta.flags & IEEE80211_STA_SSID_SET ? "SSID\n" : "",
 183                  sdata->u.sta.flags & IEEE80211_STA_BSSID_SET ? "BSSID\n" : "",
 184                  sdata->u.sta.flags & IEEE80211_STA_PREV_BSSID_SET ? "prev BSSID\n" : "",
 185                  sdata->u.sta.flags & IEEE80211_STA_AUTHENTICATED ? "AUTH\n" : "",
 186                  sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED ? "ASSOC\n" : "",
 187                  sdata->u.sta.flags & IEEE80211_STA_PROBEREQ_POLL ? "PROBEREQ POLL\n" : "",
 188                  sdata->bss_conf.use_cts_prot ? "CTS prot\n" : "");
 189 }
 190 __IEEE80211_IF_FILE(flags);
 191
 192 /* AP attributes */
 193 IEEE80211_IF_FILE(num_sta_ps, u.ap.num_sta_ps, ATOMIC);
 194 IEEE80211_IF_FILE(dtim_count, u.ap.dtim_count, DEC);
 195 IEEE80211_IF_FILE(num_beacons, u.ap.num_beacons, DEC);
 196
 197 static ssize_t ieee80211_if_fmt_num_buffered_multicast(
 198         const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
 199 {
 200         return scnprintf(buf, buflen, "%u\n",
 201                          skb_queue_len(&sdata->u.ap.ps_bc_buf));
 202 }
 203 __IEEE80211_IF_FILE(num_buffered_multicast);
 204
 205 /* WDS attributes */
 206 IEEE80211_IF_FILE(peer, u.wds.remote_addr, MAC);
 207
 208 #ifdef CONFIG_MAC80211_MESH
 209 /* Mesh stats attributes */
 210 IEEE80211_IF_FILE(fwded_frames, u.sta.mshstats.fwded_frames, DEC);
 211 IEEE80211_IF_FILE(dropped_frames_ttl, u.sta.mshstats.dropped_frames_ttl, DEC);
 212 IEEE80211_IF_FILE(dropped_frames_no_route,
 213                 u.sta.mshstats.dropped_frames_no_route, DEC);
 214 IEEE80211_IF_FILE(estab_plinks, u.sta.mshstats.estab_plinks, ATOMIC);
 215
 216 /* Mesh parameters */
 217 IEEE80211_IF_WFILE(dot11MeshMaxRetries,
 218                 u.sta.mshcfg.dot11MeshMaxRetries, DEC, u8);
 219 IEEE80211_IF_WFILE(dot11MeshRetryTimeout,
 220                 u.sta.mshcfg.dot11MeshRetryTimeout, DEC, u16);
 221 IEEE80211_IF_WFILE(dot11MeshConfirmTimeout,
 222                 u.sta.mshcfg.dot11MeshConfirmTimeout, DEC, u16);
 223 IEEE80211_IF_WFILE(dot11MeshHoldingTimeout,
 224                 u.sta.mshcfg.dot11MeshHoldingTimeout, DEC, u16);
 225 IEEE80211_IF_WFILE(dot11MeshTTL, u.sta.mshcfg.dot11MeshTTL, DEC, u8);
 226 IEEE80211_IF_WFILE(auto_open_plinks, u.sta.mshcfg.auto_open_plinks, DEC, u8);
 227 IEEE80211_IF_WFILE(dot11MeshMaxPeerLinks,
 228                 u.sta.mshcfg.dot11MeshMaxPeerLinks, DEC, u16);
 229 IEEE80211_IF_WFILE(dot11MeshHWMPactivePathTimeout,
 230                 u.sta.mshcfg.dot11MeshHWMPactivePathTimeout, DEC, u32);
 231 IEEE80211_IF_WFILE(dot11MeshHWMPpreqMinInterval,
 232                 u.sta.mshcfg.dot11MeshHWMPpreqMinInterval, DEC, u16);
 233 IEEE80211_IF_WFILE(dot11MeshHWMPnetDiameterTraversalTime,
 234                 u.sta.mshcfg.dot11MeshHWMPnetDiameterTraversalTime, DEC, u16);
 235 IEEE80211_IF_WFILE(dot11MeshHWMPmaxPREQretries,
 236                 u.sta.mshcfg.dot11MeshHWMPmaxPREQretries, DEC, u8);
 237 IEEE80211_IF_WFILE(path_refresh_time,
 238                 u.sta.mshcfg.path_refresh_time, DEC, u32);
 239 IEEE80211_IF_WFILE(min_discovery_timeout,
 240                 u.sta.mshcfg.min_discovery_timeout, DEC, u16);
 241 #endif
 242
 243
 244 #define DEBUGFS_ADD(name, type)\
 245         sdata->debugfs.type.name = debugfs_create_file(#name, 0400,\
 246                 sdata->debugfsdir, sdata, &name##_ops);
 247
 248 static void add_sta_files(struct ieee80211_sub_if_data *sdata)
 249 {
 250         DEBUGFS_ADD(drop_unencrypted, sta);
 251         DEBUGFS_ADD(force_unicast_rateidx, sta);
 252         DEBUGFS_ADD(max_ratectrl_rateidx, sta);
 253
 254         DEBUGFS_ADD(state, sta);
 255         DEBUGFS_ADD(bssid, sta);
 256         DEBUGFS_ADD(prev_bssid, sta);
 257         DEBUGFS_ADD(ssid_len, sta);
 258         DEBUGFS_ADD(aid, sta);
 259         DEBUGFS_ADD(ap_capab, sta);
 260         DEBUGFS_ADD(capab, sta);
 261         DEBUGFS_ADD(extra_ie_len, sta);
 262         DEBUGFS_ADD(auth_tries, sta);
 263         DEBUGFS_ADD(assoc_tries, sta);
 264         DEBUGFS_ADD(auth_algs, sta);
 265         DEBUGFS_ADD(auth_alg, sta);
 266         DEBUGFS_ADD(auth_transaction, sta);
 267         DEBUGFS_ADD(flags, sta);
 268         DEBUGFS_ADD(num_beacons_sta, sta);
 269 }
 270
 271 static void add_ap_files(struct ieee80211_sub_if_data *sdata)
 272 {
 273         DEBUGFS_ADD(drop_unencrypted, ap);
 274         DEBUGFS_ADD(force_unicast_rateidx, ap);
 275         DEBUGFS_ADD(max_ratectrl_rateidx, ap);
 276
 277         DEBUGFS_ADD(num_sta_ps, ap);
 278         DEBUGFS_ADD(dtim_count, ap);
 279         DEBUGFS_ADD(num_beacons, ap);
 280         DEBUGFS_ADD(num_buffered_multicast, ap);
 281 }
 282
 283 static void add_wds_files(struct ieee80211_sub_if_data *sdata)
 284 {
 285         DEBUGFS_ADD(drop_unencrypted, wds);
 286         DEBUGFS_ADD(force_unicast_rateidx, wds);
 287         DEBUGFS_ADD(max_ratectrl_rateidx, wds);
 288
 289         DEBUGFS_ADD(peer, wds);
 290 }
 291
 292 static void add_vlan_files(struct ieee80211_sub_if_data *sdata)
 293 {
 294         DEBUGFS_ADD(drop_unencrypted, vlan);
 295         DEBUGFS_ADD(force_unicast_rateidx, vlan);
 296         DEBUGFS_ADD(max_ratectrl_rateidx, vlan);
 297 }
 298
 299 static void add_monitor_files(struct ieee80211_sub_if_data *sdata)
 300 {
 301 }
 302
 303 #ifdef CONFIG_MAC80211_MESH
 304 #define MESHSTATS_ADD(name)\
 305         sdata->mesh_stats.name = debugfs_create_file(#name, 0400,\
 306                 sdata->mesh_stats_dir, sdata, &name##_ops);
 307
 308 static void add_mesh_stats(struct ieee80211_sub_if_data *sdata)
 309 {
 310         sdata->mesh_stats_dir = debugfs_create_dir("mesh_stats",
 311                                 sdata->debugfsdir);
 312         MESHSTATS_ADD(fwded_frames);
 313         MESHSTATS_ADD(dropped_frames_ttl);
 314         MESHSTATS_ADD(dropped_frames_no_route);
 315         MESHSTATS_ADD(estab_plinks);
 316 }
 317
 318 #define MESHPARAMS_ADD(name)\
 319         sdata->mesh_config.name = debugfs_create_file(#name, 0600,\
 320                 sdata->mesh_config_dir, sdata, &name##_ops);
 321
 322 static void add_mesh_config(struct ieee80211_sub_if_data *sdata)
 323 {
 324         sdata->mesh_config_dir = debugfs_create_dir("mesh_config",
 325                                 sdata->debugfsdir);
 326         MESHPARAMS_ADD(dot11MeshMaxRetries);
 327         MESHPARAMS_ADD(dot11MeshRetryTimeout);
 328         MESHPARAMS_ADD(dot11MeshConfirmTimeout);
 329         MESHPARAMS_ADD(dot11MeshHoldingTimeout);
 330         MESHPARAMS_ADD(dot11MeshTTL);
 331         MESHPARAMS_ADD(auto_open_plinks);
 332         MESHPARAMS_ADD(dot11MeshMaxPeerLinks);
 333         MESHPARAMS_ADD(dot11MeshHWMPactivePathTimeout);
 334         MESHPARAMS_ADD(dot11MeshHWMPpreqMinInterval);
 335         MESHPARAMS_ADD(dot11MeshHWMPnetDiameterTraversalTime);
 336         MESHPARAMS_ADD(dot11MeshHWMPmaxPREQretries);
 337         MESHPARAMS_ADD(path_refresh_time);
 338         MESHPARAMS_ADD(min_discovery_timeout);
 339 }
 340 #endif
 341
 342 static void add_files(struct ieee80211_sub_if_data *sdata)
 343 {
 344         if (!sdata->debugfsdir)
 345                 return;
 346
 347         switch (sdata->vif.type) {
 348         case IEEE80211_IF_TYPE_MESH_POINT:
 349 #ifdef CONFIG_MAC80211_MESH
 350                 add_mesh_stats(sdata);
 351                 add_mesh_config(sdata);
 352 #endif
 353                 /* fall through */
 354         case IEEE80211_IF_TYPE_STA:
 355         case IEEE80211_IF_TYPE_IBSS:
 356                 add_sta_files(sdata);
 357                 break;
 358         case IEEE80211_IF_TYPE_AP:
 359                 add_ap_files(sdata);
 360                 break;
 361         case IEEE80211_IF_TYPE_WDS:
 362                 add_wds_files(sdata);
 363                 break;
 364         case IEEE80211_IF_TYPE_MNTR:
 365                 add_monitor_files(sdata);
 366                 break;
 367         case IEEE80211_IF_TYPE_VLAN:
 368                 add_vlan_files(sdata);
 369                 break;
 370         default:
 371                 break;
 372         }
 373 }
 374
 375 #define DEBUGFS_DEL(name, type)                                 \
 376         do {                                                    \
 377                 debugfs_remove(sdata->debugfs.type.name);       \
 378                 sdata->debugfs.type.name = NULL;                \
 379         } while (0)
 380
 381 static void del_sta_files(struct ieee80211_sub_if_data *sdata)
 382 {
 383         DEBUGFS_DEL(drop_unencrypted, sta);
 384         DEBUGFS_DEL(force_unicast_rateidx, sta);
 385         DEBUGFS_DEL(max_ratectrl_rateidx, sta);
 386
 387         DEBUGFS_DEL(state, sta);
 388         DEBUGFS_DEL(bssid, sta);
 389         DEBUGFS_DEL(prev_bssid, sta);
 390         DEBUGFS_DEL(ssid_len, sta);
 391         DEBUGFS_DEL(aid, sta);
 392         DEBUGFS_DEL(ap_capab, sta);
 393         DEBUGFS_DEL(capab, sta);
 394         DEBUGFS_DEL(extra_ie_len, sta);
 395         DEBUGFS_DEL(auth_tries, sta);
 396         DEBUGFS_DEL(assoc_tries, sta);
 397         DEBUGFS_DEL(auth_algs, sta);
 398         DEBUGFS_DEL(auth_alg, sta);
 399         DEBUGFS_DEL(auth_transaction, sta);
 400         DEBUGFS_DEL(flags, sta);
 401         DEBUGFS_DEL(num_beacons_sta, sta);
 402 }
 403
 404 static void del_ap_files(struct ieee80211_sub_if_data *sdata)
 405 {
 406         DEBUGFS_DEL(drop_unencrypted, ap);
 407         DEBUGFS_DEL(force_unicast_rateidx, ap);
 408         DEBUGFS_DEL(max_ratectrl_rateidx, ap);
 409
 410         DEBUGFS_DEL(num_sta_ps, ap);
 411         DEBUGFS_DEL(dtim_count, ap);
 412         DEBUGFS_DEL(num_beacons, ap);
 413         DEBUGFS_DEL(num_buffered_multicast, ap);
 414 }
 415
 416 static void del_wds_files(struct ieee80211_sub_if_data *sdata)
 417 {
 418         DEBUGFS_DEL(drop_unencrypted, wds);
 419         DEBUGFS_DEL(force_unicast_rateidx, wds);
 420         DEBUGFS_DEL(max_ratectrl_rateidx, wds);
 421
 422         DEBUGFS_DEL(peer, wds);
 423 }
 424
 425 static void del_vlan_files(struct ieee80211_sub_if_data *sdata)
 426 {
 427         DEBUGFS_DEL(drop_unencrypted, vlan);
 428         DEBUGFS_DEL(force_unicast_rateidx, vlan);
 429         DEBUGFS_DEL(max_ratectrl_rateidx, vlan);
 430 }
 431
 432 static void del_monitor_files(struct ieee80211_sub_if_data *sdata)
 433 {
 434 }
 435
 436 #ifdef CONFIG_MAC80211_MESH
 437 #define MESHSTATS_DEL(name)                     \
 438         do {                                            \
 439                 debugfs_remove(sdata->mesh_stats.name); \
 440                 sdata->mesh_stats.name = NULL;          \
 441         } while (0)
 442
 443 static void del_mesh_stats(struct ieee80211_sub_if_data *sdata)
 444 {
 445         MESHSTATS_DEL(fwded_frames);
 446         MESHSTATS_DEL(dropped_frames_ttl);
 447         MESHSTATS_DEL(dropped_frames_no_route);
 448         MESHSTATS_DEL(estab_plinks);
 449         debugfs_remove(sdata->mesh_stats_dir);
 450         sdata->mesh_stats_dir = NULL;
 451 }
 452
 453 #define MESHPARAMS_DEL(name)                    \
 454         do {                                            \
 455                 debugfs_remove(sdata->mesh_config.name);        \
 456                 sdata->mesh_config.name = NULL;         \
 457         } while (0)
 458
 459 static void del_mesh_config(struct ieee80211_sub_if_data *sdata)
 460 {
 461         MESHPARAMS_DEL(dot11MeshMaxRetries);
 462         MESHPARAMS_DEL(dot11MeshRetryTimeout);
 463         MESHPARAMS_DEL(dot11MeshConfirmTimeout);
 464         MESHPARAMS_DEL(dot11MeshHoldingTimeout);
 465         MESHPARAMS_DEL(dot11MeshTTL);
 466         MESHPARAMS_DEL(auto_open_plinks);
 467         MESHPARAMS_DEL(dot11MeshMaxPeerLinks);
 468         MESHPARAMS_DEL(dot11MeshHWMPactivePathTimeout);
 469         MESHPARAMS_DEL(dot11MeshHWMPpreqMinInterval);
 470         MESHPARAMS_DEL(dot11MeshHWMPnetDiameterTraversalTime);
 471         MESHPARAMS_DEL(dot11MeshHWMPmaxPREQretries);
 472         MESHPARAMS_DEL(path_refresh_time);
 473         MESHPARAMS_DEL(min_discovery_timeout);
 474         debugfs_remove(sdata->mesh_config_dir);
 475         sdata->mesh_config_dir = NULL;
 476 }
 477 #endif
 478
 479 static void del_files(struct ieee80211_sub_if_data *sdata)
 480 {
 481         if (!sdata->debugfsdir)
 482                 return;
 483
 484         switch (sdata->vif.type) {
 485         case IEEE80211_IF_TYPE_MESH_POINT:
 486 #ifdef CONFIG_MAC80211_MESH
 487                 del_mesh_stats(sdata);
 488                 del_mesh_config(sdata);
 489 #endif
 490                 /* fall through */
 491         case IEEE80211_IF_TYPE_STA:
 492         case IEEE80211_IF_TYPE_IBSS:
 493                 del_sta_files(sdata);
 494                 break;
 495         case IEEE80211_IF_TYPE_AP:
 496                 del_ap_files(sdata);
 497                 break;
 498         case IEEE80211_IF_TYPE_WDS:
 499                 del_wds_files(sdata);
 500                 break;
 501         case IEEE80211_IF_TYPE_MNTR:
 502                 del_monitor_files(sdata);
 503                 break;
 504         case IEEE80211_IF_TYPE_VLAN:
 505                 del_vlan_files(sdata);
 506                 break;
 507         default:
 508                 break;
 509         }
 510 }
 511
 512 static int notif_registered;
 513
 514 void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata)
 515 {
 516         char buf[10+IFNAMSIZ];
 517
 518         if (!notif_registered)
 519                 return;
 520
 521         sprintf(buf, "netdev:%s", sdata->dev->name);
 522         sdata->debugfsdir = debugfs_create_dir(buf,
 523                 sdata->local->hw.wiphy->debugfsdir);
 524         add_files(sdata);
 525 }
 526
 527 void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata)
 528 {
 529         del_files(sdata);
 530         debugfs_remove(sdata->debugfsdir);
 531         sdata->debugfsdir = NULL;
 532 }
 533
 534 static int netdev_notify(struct notifier_block *nb,
 535                          unsigned long state,
 536                          void *ndev)
 537 {
 538         struct net_device *dev = ndev;
 539         struct dentry *dir;
 540         struct ieee80211_sub_if_data *sdata;
 541         char buf[10+IFNAMSIZ];
 542
 543         if (state != NETDEV_CHANGENAME)
 544                 return 0;
 545
 546         if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
 547                 return 0;
 548
 549         if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
 550                 return 0;
 551
 552         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 553
 554         sprintf(buf, "netdev:%s", dev->name);
 555         dir = sdata->debugfsdir;
 556         if (!debugfs_rename(dir->d_parent, dir, dir->d_parent, buf))
 557                 printk(KERN_ERR "mac80211: debugfs: failed to rename debugfs "
 558                        "dir to %s\n", buf);
 559
 560         return 0;
 561 }
 562
 563 static struct notifier_block mac80211_debugfs_netdev_notifier = {
 564         .notifier_call = netdev_notify,
 565 };
 566
 567 void ieee80211_debugfs_netdev_init(void)
 568 {
 569         int err;
 570
 571         err = register_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
 572         if (err) {
 573                 printk(KERN_ERR
 574                        "mac80211: failed to install netdev notifier,"
 575                        " disabling per-netdev debugfs!\n");
 576         } else
 577                 notif_registered = 1;
 578 }
 579
 580 void ieee80211_debugfs_netdev_exit(void)
 581 {
 582         unregister_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
 583         notif_registered = 0;
 584 }