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         return scnprintf(buf, buflen, "%pM\n", sdata->field);           \
 108 }
 109
 110 #define __IEEE80211_IF_FILE(name)                                       \
 111 static ssize_t ieee80211_if_read_##name(struct file *file,              \
 112                                         char __user *userbuf,           \
 113                                         size_t count, loff_t *ppos)     \
 114 {                                                                       \
 115         return ieee80211_if_read(file->private_data,                    \
 116                                  userbuf, count, ppos,                  \
 117                                  ieee80211_if_fmt_##name);              \
 118 }                                                                       \
 119 static const struct file_operations name##_ops = {                      \
 120         .read = ieee80211_if_read_##name,                               \
 121         .open = mac80211_open_file_generic,                             \
 122 }
 123
 124 #define IEEE80211_IF_FILE(name, field, format)                          \
 125                 IEEE80211_IF_FMT_##format(name, field)                  \
 126                 __IEEE80211_IF_FILE(name)
 127
 128 #define __IEEE80211_IF_WFILE(name)                                      \
 129 static ssize_t ieee80211_if_read_##name(struct file *file,              \
 130                                         char __user *userbuf,           \
 131                                         size_t count, loff_t *ppos)     \
 132 {                                                                       \
 133         return ieee80211_if_read(file->private_data,                    \
 134                                  userbuf, count, ppos,                  \
 135                                  ieee80211_if_fmt_##name);              \
 136 }                                                                       \
 137 static ssize_t ieee80211_if_write_##name(struct file *file,             \
 138                                         const char __user *userbuf,     \
 139                                         size_t count, loff_t *ppos)     \
 140 {                                                                       \
 141         return ieee80211_if_write(file->private_data,                   \
 142                                  userbuf, count, ppos,                  \
 143                                  ieee80211_if_wfmt_##name);             \
 144 }                                                                       \
 145 static const struct file_operations name##_ops = {                      \
 146         .read = ieee80211_if_read_##name,                               \
 147         .write = ieee80211_if_write_##name,                             \
 148         .open = mac80211_open_file_generic,                             \
 149 }
 150
 151 #define IEEE80211_IF_WFILE(name, field, format, type)                   \
 152                 IEEE80211_IF_FMT_##format(name, field)                  \
 153                 IEEE80211_IF_WFMT(name, field, type)                    \
 154                 __IEEE80211_IF_WFILE(name)
 155
 156 /* common attributes */
 157 IEEE80211_IF_FILE(drop_unencrypted, drop_unencrypted, DEC);
 158 IEEE80211_IF_FILE(force_unicast_rateidx, force_unicast_rateidx, DEC);
 159 IEEE80211_IF_FILE(max_ratectrl_rateidx, max_ratectrl_rateidx, DEC);
 160
 161 /* STA/IBSS attributes */
 162 IEEE80211_IF_FILE(state, u.sta.state, DEC);
 163 IEEE80211_IF_FILE(bssid, u.sta.bssid, MAC);
 164 IEEE80211_IF_FILE(prev_bssid, u.sta.prev_bssid, MAC);
 165 IEEE80211_IF_FILE(ssid_len, u.sta.ssid_len, SIZE);
 166 IEEE80211_IF_FILE(aid, u.sta.aid, DEC);
 167 IEEE80211_IF_FILE(ap_capab, u.sta.ap_capab, HEX);
 168 IEEE80211_IF_FILE(capab, u.sta.capab, HEX);
 169 IEEE80211_IF_FILE(extra_ie_len, u.sta.extra_ie_len, SIZE);
 170 IEEE80211_IF_FILE(auth_tries, u.sta.auth_tries, DEC);
 171 IEEE80211_IF_FILE(assoc_tries, u.sta.assoc_tries, DEC);
 172 IEEE80211_IF_FILE(auth_algs, u.sta.auth_algs, HEX);
 173 IEEE80211_IF_FILE(auth_alg, u.sta.auth_alg, DEC);
 174 IEEE80211_IF_FILE(auth_transaction, u.sta.auth_transaction, DEC);
 175
 176 static ssize_t ieee80211_if_fmt_flags(
 177         const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
 178 {
 179         return scnprintf(buf, buflen, "%s%s%s%s%s%s%s\n",
 180                  sdata->u.sta.flags & IEEE80211_STA_SSID_SET ? "SSID\n" : "",
 181                  sdata->u.sta.flags & IEEE80211_STA_BSSID_SET ? "BSSID\n" : "",
 182                  sdata->u.sta.flags & IEEE80211_STA_PREV_BSSID_SET ? "prev BSSID\n" : "",
 183                  sdata->u.sta.flags & IEEE80211_STA_AUTHENTICATED ? "AUTH\n" : "",
 184                  sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED ? "ASSOC\n" : "",
 185                  sdata->u.sta.flags & IEEE80211_STA_PROBEREQ_POLL ? "PROBEREQ POLL\n" : "",
 186                  sdata->bss_conf.use_cts_prot ? "CTS prot\n" : "");
 187 }
 188 __IEEE80211_IF_FILE(flags);
 189
 190 /* AP attributes */
 191 IEEE80211_IF_FILE(num_sta_ps, u.ap.num_sta_ps, ATOMIC);
 192 IEEE80211_IF_FILE(dtim_count, u.ap.dtim_count, DEC);
 193
 194 static ssize_t ieee80211_if_fmt_num_buffered_multicast(
 195         const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
 196 {
 197         return scnprintf(buf, buflen, "%u\n",
 198                          skb_queue_len(&sdata->u.ap.ps_bc_buf));
 199 }
 200 __IEEE80211_IF_FILE(num_buffered_multicast);
 201
 202 /* WDS attributes */
 203 IEEE80211_IF_FILE(peer, u.wds.remote_addr, MAC);
 204
 205 #ifdef CONFIG_MAC80211_MESH
 206 /* Mesh stats attributes */
 207 IEEE80211_IF_FILE(fwded_frames, u.mesh.mshstats.fwded_frames, DEC);
 208 IEEE80211_IF_FILE(dropped_frames_ttl, u.mesh.mshstats.dropped_frames_ttl, DEC);
 209 IEEE80211_IF_FILE(dropped_frames_no_route,
 210                 u.mesh.mshstats.dropped_frames_no_route, DEC);
 211 IEEE80211_IF_FILE(estab_plinks, u.mesh.mshstats.estab_plinks, ATOMIC);
 212
 213 /* Mesh parameters */
 214 IEEE80211_IF_WFILE(dot11MeshMaxRetries,
 215                 u.mesh.mshcfg.dot11MeshMaxRetries, DEC, u8);
 216 IEEE80211_IF_WFILE(dot11MeshRetryTimeout,
 217                 u.mesh.mshcfg.dot11MeshRetryTimeout, DEC, u16);
 218 IEEE80211_IF_WFILE(dot11MeshConfirmTimeout,
 219                 u.mesh.mshcfg.dot11MeshConfirmTimeout, DEC, u16);
 220 IEEE80211_IF_WFILE(dot11MeshHoldingTimeout,
 221                 u.mesh.mshcfg.dot11MeshHoldingTimeout, DEC, u16);
 222 IEEE80211_IF_WFILE(dot11MeshTTL, u.mesh.mshcfg.dot11MeshTTL, DEC, u8);
 223 IEEE80211_IF_WFILE(auto_open_plinks, u.mesh.mshcfg.auto_open_plinks, DEC, u8);
 224 IEEE80211_IF_WFILE(dot11MeshMaxPeerLinks,
 225                 u.mesh.mshcfg.dot11MeshMaxPeerLinks, DEC, u16);
 226 IEEE80211_IF_WFILE(dot11MeshHWMPactivePathTimeout,
 227                 u.mesh.mshcfg.dot11MeshHWMPactivePathTimeout, DEC, u32);
 228 IEEE80211_IF_WFILE(dot11MeshHWMPpreqMinInterval,
 229                 u.mesh.mshcfg.dot11MeshHWMPpreqMinInterval, DEC, u16);
 230 IEEE80211_IF_WFILE(dot11MeshHWMPnetDiameterTraversalTime,
 231                 u.mesh.mshcfg.dot11MeshHWMPnetDiameterTraversalTime, DEC, u16);
 232 IEEE80211_IF_WFILE(dot11MeshHWMPmaxPREQretries,
 233                 u.mesh.mshcfg.dot11MeshHWMPmaxPREQretries, DEC, u8);
 234 IEEE80211_IF_WFILE(path_refresh_time,
 235                 u.mesh.mshcfg.path_refresh_time, DEC, u32);
 236 IEEE80211_IF_WFILE(min_discovery_timeout,
 237                 u.mesh.mshcfg.min_discovery_timeout, DEC, u16);
 238 #endif
 239
 240
 241 #define DEBUGFS_ADD(name, type)\
 242         sdata->debugfs.type.name = debugfs_create_file(#name, 0400,\
 243                 sdata->debugfsdir, sdata, &name##_ops);
 244
 245 static void add_sta_files(struct ieee80211_sub_if_data *sdata)
 246 {
 247         DEBUGFS_ADD(drop_unencrypted, sta);
 248         DEBUGFS_ADD(force_unicast_rateidx, sta);
 249         DEBUGFS_ADD(max_ratectrl_rateidx, sta);
 250
 251         DEBUGFS_ADD(state, sta);
 252         DEBUGFS_ADD(bssid, sta);
 253         DEBUGFS_ADD(prev_bssid, sta);
 254         DEBUGFS_ADD(ssid_len, sta);
 255         DEBUGFS_ADD(aid, sta);
 256         DEBUGFS_ADD(ap_capab, sta);
 257         DEBUGFS_ADD(capab, sta);
 258         DEBUGFS_ADD(extra_ie_len, sta);
 259         DEBUGFS_ADD(auth_tries, sta);
 260         DEBUGFS_ADD(assoc_tries, sta);
 261         DEBUGFS_ADD(auth_algs, sta);
 262         DEBUGFS_ADD(auth_alg, sta);
 263         DEBUGFS_ADD(auth_transaction, sta);
 264         DEBUGFS_ADD(flags, sta);
 265 }
 266
 267 static void add_ap_files(struct ieee80211_sub_if_data *sdata)
 268 {
 269         DEBUGFS_ADD(drop_unencrypted, ap);
 270         DEBUGFS_ADD(force_unicast_rateidx, ap);
 271         DEBUGFS_ADD(max_ratectrl_rateidx, ap);
 272
 273         DEBUGFS_ADD(num_sta_ps, ap);
 274         DEBUGFS_ADD(dtim_count, ap);
 275         DEBUGFS_ADD(num_buffered_multicast, ap);
 276 }
 277
 278 static void add_wds_files(struct ieee80211_sub_if_data *sdata)
 279 {
 280         DEBUGFS_ADD(drop_unencrypted, wds);
 281         DEBUGFS_ADD(force_unicast_rateidx, wds);
 282         DEBUGFS_ADD(max_ratectrl_rateidx, wds);
 283
 284         DEBUGFS_ADD(peer, wds);
 285 }
 286
 287 static void add_vlan_files(struct ieee80211_sub_if_data *sdata)
 288 {
 289         DEBUGFS_ADD(drop_unencrypted, vlan);
 290         DEBUGFS_ADD(force_unicast_rateidx, vlan);
 291         DEBUGFS_ADD(max_ratectrl_rateidx, vlan);
 292 }
 293
 294 static void add_monitor_files(struct ieee80211_sub_if_data *sdata)
 295 {
 296 }
 297
 298 #ifdef CONFIG_MAC80211_MESH
 299 #define MESHSTATS_ADD(name)\
 300         sdata->mesh_stats.name = debugfs_create_file(#name, 0400,\
 301                 sdata->mesh_stats_dir, sdata, &name##_ops);
 302
 303 static void add_mesh_stats(struct ieee80211_sub_if_data *sdata)
 304 {
 305         sdata->mesh_stats_dir = debugfs_create_dir("mesh_stats",
 306                                 sdata->debugfsdir);
 307         MESHSTATS_ADD(fwded_frames);
 308         MESHSTATS_ADD(dropped_frames_ttl);
 309         MESHSTATS_ADD(dropped_frames_no_route);
 310         MESHSTATS_ADD(estab_plinks);
 311 }
 312
 313 #define MESHPARAMS_ADD(name)\
 314         sdata->mesh_config.name = debugfs_create_file(#name, 0600,\
 315                 sdata->mesh_config_dir, sdata, &name##_ops);
 316
 317 static void add_mesh_config(struct ieee80211_sub_if_data *sdata)
 318 {
 319         sdata->mesh_config_dir = debugfs_create_dir("mesh_config",
 320                                 sdata->debugfsdir);
 321         MESHPARAMS_ADD(dot11MeshMaxRetries);
 322         MESHPARAMS_ADD(dot11MeshRetryTimeout);
 323         MESHPARAMS_ADD(dot11MeshConfirmTimeout);
 324         MESHPARAMS_ADD(dot11MeshHoldingTimeout);
 325         MESHPARAMS_ADD(dot11MeshTTL);
 326         MESHPARAMS_ADD(auto_open_plinks);
 327         MESHPARAMS_ADD(dot11MeshMaxPeerLinks);
 328         MESHPARAMS_ADD(dot11MeshHWMPactivePathTimeout);
 329         MESHPARAMS_ADD(dot11MeshHWMPpreqMinInterval);
 330         MESHPARAMS_ADD(dot11MeshHWMPnetDiameterTraversalTime);
 331         MESHPARAMS_ADD(dot11MeshHWMPmaxPREQretries);
 332         MESHPARAMS_ADD(path_refresh_time);
 333         MESHPARAMS_ADD(min_discovery_timeout);
 334 }
 335 #endif
 336
 337 static void add_files(struct ieee80211_sub_if_data *sdata)
 338 {
 339         if (!sdata->debugfsdir)
 340                 return;
 341
 342         switch (sdata->vif.type) {
 343         case NL80211_IFTYPE_MESH_POINT:
 344 #ifdef CONFIG_MAC80211_MESH
 345                 add_mesh_stats(sdata);
 346                 add_mesh_config(sdata);
 347 #endif
 348                 break;
 349         case NL80211_IFTYPE_STATION:
 350         case NL80211_IFTYPE_ADHOC:
 351                 add_sta_files(sdata);
 352                 break;
 353         case NL80211_IFTYPE_AP:
 354                 add_ap_files(sdata);
 355                 break;
 356         case NL80211_IFTYPE_WDS:
 357                 add_wds_files(sdata);
 358                 break;
 359         case NL80211_IFTYPE_MONITOR:
 360                 add_monitor_files(sdata);
 361                 break;
 362         case NL80211_IFTYPE_AP_VLAN:
 363                 add_vlan_files(sdata);
 364                 break;
 365         default:
 366                 break;
 367         }
 368 }
 369
 370 #define DEBUGFS_DEL(name, type)                                 \
 371         do {                                                    \
 372                 debugfs_remove(sdata->debugfs.type.name);       \
 373                 sdata->debugfs.type.name = NULL;                \
 374         } while (0)
 375
 376 static void del_sta_files(struct ieee80211_sub_if_data *sdata)
 377 {
 378         DEBUGFS_DEL(drop_unencrypted, sta);
 379         DEBUGFS_DEL(force_unicast_rateidx, sta);
 380         DEBUGFS_DEL(max_ratectrl_rateidx, sta);
 381
 382         DEBUGFS_DEL(state, sta);
 383         DEBUGFS_DEL(bssid, sta);
 384         DEBUGFS_DEL(prev_bssid, sta);
 385         DEBUGFS_DEL(ssid_len, sta);
 386         DEBUGFS_DEL(aid, sta);
 387         DEBUGFS_DEL(ap_capab, sta);
 388         DEBUGFS_DEL(capab, sta);
 389         DEBUGFS_DEL(extra_ie_len, sta);
 390         DEBUGFS_DEL(auth_tries, sta);
 391         DEBUGFS_DEL(assoc_tries, sta);
 392         DEBUGFS_DEL(auth_algs, sta);
 393         DEBUGFS_DEL(auth_alg, sta);
 394         DEBUGFS_DEL(auth_transaction, sta);
 395         DEBUGFS_DEL(flags, sta);
 396 }
 397
 398 static void del_ap_files(struct ieee80211_sub_if_data *sdata)
 399 {
 400         DEBUGFS_DEL(drop_unencrypted, ap);
 401         DEBUGFS_DEL(force_unicast_rateidx, ap);
 402         DEBUGFS_DEL(max_ratectrl_rateidx, ap);
 403
 404         DEBUGFS_DEL(num_sta_ps, ap);
 405         DEBUGFS_DEL(dtim_count, ap);
 406         DEBUGFS_DEL(num_buffered_multicast, ap);
 407 }
 408
 409 static void del_wds_files(struct ieee80211_sub_if_data *sdata)
 410 {
 411         DEBUGFS_DEL(drop_unencrypted, wds);
 412         DEBUGFS_DEL(force_unicast_rateidx, wds);
 413         DEBUGFS_DEL(max_ratectrl_rateidx, wds);
 414
 415         DEBUGFS_DEL(peer, wds);
 416 }
 417
 418 static void del_vlan_files(struct ieee80211_sub_if_data *sdata)
 419 {
 420         DEBUGFS_DEL(drop_unencrypted, vlan);
 421         DEBUGFS_DEL(force_unicast_rateidx, vlan);
 422         DEBUGFS_DEL(max_ratectrl_rateidx, vlan);
 423 }
 424
 425 static void del_monitor_files(struct ieee80211_sub_if_data *sdata)
 426 {
 427 }
 428
 429 #ifdef CONFIG_MAC80211_MESH
 430 #define MESHSTATS_DEL(name)                     \
 431         do {                                            \
 432                 debugfs_remove(sdata->mesh_stats.name); \
 433                 sdata->mesh_stats.name = NULL;          \
 434         } while (0)
 435
 436 static void del_mesh_stats(struct ieee80211_sub_if_data *sdata)
 437 {
 438         MESHSTATS_DEL(fwded_frames);
 439         MESHSTATS_DEL(dropped_frames_ttl);
 440         MESHSTATS_DEL(dropped_frames_no_route);
 441         MESHSTATS_DEL(estab_plinks);
 442         debugfs_remove(sdata->mesh_stats_dir);
 443         sdata->mesh_stats_dir = NULL;
 444 }
 445
 446 #define MESHPARAMS_DEL(name)                    \
 447         do {                                            \
 448                 debugfs_remove(sdata->mesh_config.name);        \
 449                 sdata->mesh_config.name = NULL;         \
 450         } while (0)
 451
 452 static void del_mesh_config(struct ieee80211_sub_if_data *sdata)
 453 {
 454         MESHPARAMS_DEL(dot11MeshMaxRetries);
 455         MESHPARAMS_DEL(dot11MeshRetryTimeout);
 456         MESHPARAMS_DEL(dot11MeshConfirmTimeout);
 457         MESHPARAMS_DEL(dot11MeshHoldingTimeout);
 458         MESHPARAMS_DEL(dot11MeshTTL);
 459         MESHPARAMS_DEL(auto_open_plinks);
 460         MESHPARAMS_DEL(dot11MeshMaxPeerLinks);
 461         MESHPARAMS_DEL(dot11MeshHWMPactivePathTimeout);
 462         MESHPARAMS_DEL(dot11MeshHWMPpreqMinInterval);
 463         MESHPARAMS_DEL(dot11MeshHWMPnetDiameterTraversalTime);
 464         MESHPARAMS_DEL(dot11MeshHWMPmaxPREQretries);
 465         MESHPARAMS_DEL(path_refresh_time);
 466         MESHPARAMS_DEL(min_discovery_timeout);
 467         debugfs_remove(sdata->mesh_config_dir);
 468         sdata->mesh_config_dir = NULL;
 469 }
 470 #endif
 471
 472 static void del_files(struct ieee80211_sub_if_data *sdata)
 473 {
 474         if (!sdata->debugfsdir)
 475                 return;
 476
 477         switch (sdata->vif.type) {
 478         case NL80211_IFTYPE_MESH_POINT:
 479 #ifdef CONFIG_MAC80211_MESH
 480                 del_mesh_stats(sdata);
 481                 del_mesh_config(sdata);
 482 #endif
 483                 break;
 484         case NL80211_IFTYPE_STATION:
 485         case NL80211_IFTYPE_ADHOC:
 486                 del_sta_files(sdata);
 487                 break;
 488         case NL80211_IFTYPE_AP:
 489                 del_ap_files(sdata);
 490                 break;
 491         case NL80211_IFTYPE_WDS:
 492                 del_wds_files(sdata);
 493                 break;
 494         case NL80211_IFTYPE_MONITOR:
 495                 del_monitor_files(sdata);
 496                 break;
 497         case NL80211_IFTYPE_AP_VLAN:
 498                 del_vlan_files(sdata);
 499                 break;
 500         default:
 501                 break;
 502         }
 503 }
 504
 505 static int notif_registered;
 506
 507 void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata)
 508 {
 509         char buf[10+IFNAMSIZ];
 510
 511         if (!notif_registered)
 512                 return;
 513
 514         sprintf(buf, "netdev:%s", sdata->dev->name);
 515         sdata->debugfsdir = debugfs_create_dir(buf,
 516                 sdata->local->hw.wiphy->debugfsdir);
 517         add_files(sdata);
 518 }
 519
 520 void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata)
 521 {
 522         del_files(sdata);
 523         debugfs_remove(sdata->debugfsdir);
 524         sdata->debugfsdir = NULL;
 525 }
 526
 527 static int netdev_notify(struct notifier_block *nb,
 528                          unsigned long state,
 529                          void *ndev)
 530 {
 531         struct net_device *dev = ndev;
 532         struct dentry *dir;
 533         struct ieee80211_sub_if_data *sdata;
 534         char buf[10+IFNAMSIZ];
 535
 536         if (state != NETDEV_CHANGENAME)
 537                 return 0;
 538
 539         if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
 540                 return 0;
 541
 542         if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
 543                 return 0;
 544
 545         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 546
 547         dir = sdata->debugfsdir;
 548
 549         if (!dir)
 550                 return 0;
 551
 552         sprintf(buf, "netdev:%s", dev->name);
 553         if (!debugfs_rename(dir->d_parent, dir, dir->d_parent, buf))
 554                 printk(KERN_ERR "mac80211: debugfs: failed to rename debugfs "
 555                        "dir to %s\n", buf);
 556
 557         return 0;
 558 }
 559
 560 static struct notifier_block mac80211_debugfs_netdev_notifier = {
 561         .notifier_call = netdev_notify,
 562 };
 563
 564 void ieee80211_debugfs_netdev_init(void)
 565 {
 566         int err;
 567
 568         err = register_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
 569         if (err) {
 570                 printk(KERN_ERR
 571                        "mac80211: failed to install netdev notifier,"
 572                        " disabling per-netdev debugfs!\n");
 573         } else
 574                 notif_registered = 1;
 575 }
 576
 577 void ieee80211_debugfs_netdev_exit(void)
 578 {
 579         unregister_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
 580         notif_registered = 0;
 581 }