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
 160 /* STA/IBSS attributes */
 161 IEEE80211_IF_FILE(state, u.sta.state, DEC);
 162 IEEE80211_IF_FILE(bssid, u.sta.bssid, MAC);
 163 IEEE80211_IF_FILE(prev_bssid, u.sta.prev_bssid, MAC);
 164 IEEE80211_IF_FILE(ssid_len, u.sta.ssid_len, SIZE);
 165 IEEE80211_IF_FILE(aid, u.sta.aid, DEC);
 166 IEEE80211_IF_FILE(ap_capab, u.sta.ap_capab, HEX);
 167 IEEE80211_IF_FILE(capab, u.sta.capab, HEX);
 168 IEEE80211_IF_FILE(extra_ie_len, u.sta.extra_ie_len, SIZE);
 169 IEEE80211_IF_FILE(auth_tries, u.sta.auth_tries, DEC);
 170 IEEE80211_IF_FILE(assoc_tries, u.sta.assoc_tries, DEC);
 171 IEEE80211_IF_FILE(auth_algs, u.sta.auth_algs, HEX);
 172 IEEE80211_IF_FILE(auth_alg, u.sta.auth_alg, DEC);
 173 IEEE80211_IF_FILE(auth_transaction, u.sta.auth_transaction, DEC);
 174 IEEE80211_IF_FILE(num_beacons_sta, u.sta.num_beacons, 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 IEEE80211_IF_FILE(num_beacons, u.ap.num_beacons, DEC);
 194 IEEE80211_IF_FILE(force_unicast_rateidx, u.ap.force_unicast_rateidx, DEC);
 195 IEEE80211_IF_FILE(max_ratectrl_rateidx, u.ap.max_ratectrl_rateidx, 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(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         DEBUGFS_ADD(num_beacons_sta, sta);
 266 }
 267
 268 static void add_ap_files(struct ieee80211_sub_if_data *sdata)
 269 {
 270         DEBUGFS_ADD(drop_unencrypted, ap);
 271         DEBUGFS_ADD(num_sta_ps, ap);
 272         DEBUGFS_ADD(dtim_count, ap);
 273         DEBUGFS_ADD(num_beacons, ap);
 274         DEBUGFS_ADD(force_unicast_rateidx, ap);
 275         DEBUGFS_ADD(max_ratectrl_rateidx, ap);
 276         DEBUGFS_ADD(num_buffered_multicast, ap);
 277 }
 278
 279 static void add_wds_files(struct ieee80211_sub_if_data *sdata)
 280 {
 281         DEBUGFS_ADD(drop_unencrypted, wds);
 282         DEBUGFS_ADD(peer, wds);
 283 }
 284
 285 static void add_vlan_files(struct ieee80211_sub_if_data *sdata)
 286 {
 287         DEBUGFS_ADD(drop_unencrypted, vlan);
 288 }
 289
 290 static void add_monitor_files(struct ieee80211_sub_if_data *sdata)
 291 {
 292 }
 293
 294 #ifdef CONFIG_MAC80211_MESH
 295 #define MESHSTATS_ADD(name)\
 296         sdata->mesh_stats.name = debugfs_create_file(#name, 0400,\
 297                 sdata->mesh_stats_dir, sdata, &name##_ops);
 298
 299 static void add_mesh_stats(struct ieee80211_sub_if_data *sdata)
 300 {
 301         sdata->mesh_stats_dir = debugfs_create_dir("mesh_stats",
 302                                 sdata->debugfsdir);
 303         MESHSTATS_ADD(fwded_frames);
 304         MESHSTATS_ADD(dropped_frames_ttl);
 305         MESHSTATS_ADD(dropped_frames_no_route);
 306         MESHSTATS_ADD(estab_plinks);
 307 }
 308
 309 #define MESHPARAMS_ADD(name)\
 310         sdata->mesh_config.name = debugfs_create_file(#name, 0600,\
 311                 sdata->mesh_config_dir, sdata, &name##_ops);
 312
 313 static void add_mesh_config(struct ieee80211_sub_if_data *sdata)
 314 {
 315         sdata->mesh_config_dir = debugfs_create_dir("mesh_config",
 316                                 sdata->debugfsdir);
 317         MESHPARAMS_ADD(dot11MeshMaxRetries);
 318         MESHPARAMS_ADD(dot11MeshRetryTimeout);
 319         MESHPARAMS_ADD(dot11MeshConfirmTimeout);
 320         MESHPARAMS_ADD(dot11MeshHoldingTimeout);
 321         MESHPARAMS_ADD(dot11MeshTTL);
 322         MESHPARAMS_ADD(auto_open_plinks);
 323         MESHPARAMS_ADD(dot11MeshMaxPeerLinks);
 324         MESHPARAMS_ADD(dot11MeshHWMPactivePathTimeout);
 325         MESHPARAMS_ADD(dot11MeshHWMPpreqMinInterval);
 326         MESHPARAMS_ADD(dot11MeshHWMPnetDiameterTraversalTime);
 327         MESHPARAMS_ADD(dot11MeshHWMPmaxPREQretries);
 328         MESHPARAMS_ADD(path_refresh_time);
 329         MESHPARAMS_ADD(min_discovery_timeout);
 330 }
 331 #endif
 332
 333 static void add_files(struct ieee80211_sub_if_data *sdata)
 334 {
 335         if (!sdata->debugfsdir)
 336                 return;
 337
 338         switch (sdata->vif.type) {
 339         case IEEE80211_IF_TYPE_MESH_POINT:
 340 #ifdef CONFIG_MAC80211_MESH
 341                 add_mesh_stats(sdata);
 342                 add_mesh_config(sdata);
 343 #endif
 344                 /* fall through */
 345         case IEEE80211_IF_TYPE_STA:
 346         case IEEE80211_IF_TYPE_IBSS:
 347                 add_sta_files(sdata);
 348                 break;
 349         case IEEE80211_IF_TYPE_AP:
 350                 add_ap_files(sdata);
 351                 break;
 352         case IEEE80211_IF_TYPE_WDS:
 353                 add_wds_files(sdata);
 354                 break;
 355         case IEEE80211_IF_TYPE_MNTR:
 356                 add_monitor_files(sdata);
 357                 break;
 358         case IEEE80211_IF_TYPE_VLAN:
 359                 add_vlan_files(sdata);
 360                 break;
 361         default:
 362                 break;
 363         }
 364 }
 365
 366 #define DEBUGFS_DEL(name, type)                                 \
 367         do {                                                    \
 368                 debugfs_remove(sdata->debugfs.type.name);       \
 369                 sdata->debugfs.type.name = NULL;                \
 370         } while (0)
 371
 372 static void del_sta_files(struct ieee80211_sub_if_data *sdata)
 373 {
 374         DEBUGFS_DEL(drop_unencrypted, sta);
 375         DEBUGFS_DEL(state, sta);
 376         DEBUGFS_DEL(bssid, sta);
 377         DEBUGFS_DEL(prev_bssid, sta);
 378         DEBUGFS_DEL(ssid_len, sta);
 379         DEBUGFS_DEL(aid, sta);
 380         DEBUGFS_DEL(ap_capab, sta);
 381         DEBUGFS_DEL(capab, sta);
 382         DEBUGFS_DEL(extra_ie_len, sta);
 383         DEBUGFS_DEL(auth_tries, sta);
 384         DEBUGFS_DEL(assoc_tries, sta);
 385         DEBUGFS_DEL(auth_algs, sta);
 386         DEBUGFS_DEL(auth_alg, sta);
 387         DEBUGFS_DEL(auth_transaction, sta);
 388         DEBUGFS_DEL(flags, sta);
 389         DEBUGFS_DEL(num_beacons_sta, sta);
 390 }
 391
 392 static void del_ap_files(struct ieee80211_sub_if_data *sdata)
 393 {
 394         DEBUGFS_DEL(drop_unencrypted, ap);
 395         DEBUGFS_DEL(num_sta_ps, ap);
 396         DEBUGFS_DEL(dtim_count, ap);
 397         DEBUGFS_DEL(num_beacons, ap);
 398         DEBUGFS_DEL(force_unicast_rateidx, ap);
 399         DEBUGFS_DEL(max_ratectrl_rateidx, ap);
 400         DEBUGFS_DEL(num_buffered_multicast, ap);
 401 }
 402
 403 static void del_wds_files(struct ieee80211_sub_if_data *sdata)
 404 {
 405         DEBUGFS_DEL(drop_unencrypted, wds);
 406         DEBUGFS_DEL(peer, wds);
 407 }
 408
 409 static void del_vlan_files(struct ieee80211_sub_if_data *sdata)
 410 {
 411         DEBUGFS_DEL(drop_unencrypted, vlan);
 412 }
 413
 414 static void del_monitor_files(struct ieee80211_sub_if_data *sdata)
 415 {
 416 }
 417
 418 #ifdef CONFIG_MAC80211_MESH
 419 #define MESHSTATS_DEL(name)                     \
 420         do {                                            \
 421                 debugfs_remove(sdata->mesh_stats.name); \
 422                 sdata->mesh_stats.name = NULL;          \
 423         } while (0)
 424
 425 static void del_mesh_stats(struct ieee80211_sub_if_data *sdata)
 426 {
 427         MESHSTATS_DEL(fwded_frames);
 428         MESHSTATS_DEL(dropped_frames_ttl);
 429         MESHSTATS_DEL(dropped_frames_no_route);
 430         MESHSTATS_DEL(estab_plinks);
 431         debugfs_remove(sdata->mesh_stats_dir);
 432         sdata->mesh_stats_dir = NULL;
 433 }
 434
 435 #define MESHPARAMS_DEL(name)                    \
 436         do {                                            \
 437                 debugfs_remove(sdata->mesh_config.name);        \
 438                 sdata->mesh_config.name = NULL;         \
 439         } while (0)
 440
 441 static void del_mesh_config(struct ieee80211_sub_if_data *sdata)
 442 {
 443         MESHPARAMS_DEL(dot11MeshMaxRetries);
 444         MESHPARAMS_DEL(dot11MeshRetryTimeout);
 445         MESHPARAMS_DEL(dot11MeshConfirmTimeout);
 446         MESHPARAMS_DEL(dot11MeshHoldingTimeout);
 447         MESHPARAMS_DEL(dot11MeshTTL);
 448         MESHPARAMS_DEL(auto_open_plinks);
 449         MESHPARAMS_DEL(dot11MeshMaxPeerLinks);
 450         MESHPARAMS_DEL(dot11MeshHWMPactivePathTimeout);
 451         MESHPARAMS_DEL(dot11MeshHWMPpreqMinInterval);
 452         MESHPARAMS_DEL(dot11MeshHWMPnetDiameterTraversalTime);
 453         MESHPARAMS_DEL(dot11MeshHWMPmaxPREQretries);
 454         MESHPARAMS_DEL(path_refresh_time);
 455         MESHPARAMS_DEL(min_discovery_timeout);
 456         debugfs_remove(sdata->mesh_config_dir);
 457         sdata->mesh_config_dir = NULL;
 458 }
 459 #endif
 460
 461 static void del_files(struct ieee80211_sub_if_data *sdata, int type)
 462 {
 463         if (!sdata->debugfsdir)
 464                 return;
 465
 466         switch (type) {
 467         case IEEE80211_IF_TYPE_MESH_POINT:
 468 #ifdef CONFIG_MAC80211_MESH
 469                 del_mesh_stats(sdata);
 470                 del_mesh_config(sdata);
 471 #endif
 472                 /* fall through */
 473         case IEEE80211_IF_TYPE_STA:
 474         case IEEE80211_IF_TYPE_IBSS:
 475                 del_sta_files(sdata);
 476                 break;
 477         case IEEE80211_IF_TYPE_AP:
 478                 del_ap_files(sdata);
 479                 break;
 480         case IEEE80211_IF_TYPE_WDS:
 481                 del_wds_files(sdata);
 482                 break;
 483         case IEEE80211_IF_TYPE_MNTR:
 484                 del_monitor_files(sdata);
 485                 break;
 486         case IEEE80211_IF_TYPE_VLAN:
 487                 del_vlan_files(sdata);
 488                 break;
 489         default:
 490                 break;
 491         }
 492 }
 493
 494 static int notif_registered;
 495
 496 void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata)
 497 {
 498         char buf[10+IFNAMSIZ];
 499
 500         if (!notif_registered)
 501                 return;
 502
 503         sprintf(buf, "netdev:%s", sdata->dev->name);
 504         sdata->debugfsdir = debugfs_create_dir(buf,
 505                 sdata->local->hw.wiphy->debugfsdir);
 506 }
 507
 508 void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata)
 509 {
 510         del_files(sdata, sdata->vif.type);
 511         debugfs_remove(sdata->debugfsdir);
 512         sdata->debugfsdir = NULL;
 513 }
 514
 515 void ieee80211_debugfs_change_if_type(struct ieee80211_sub_if_data *sdata,
 516                                       int oldtype)
 517 {
 518         del_files(sdata, oldtype);
 519         add_files(sdata);
 520 }
 521
 522 static int netdev_notify(struct notifier_block *nb,
 523                          unsigned long state,
 524                          void *ndev)
 525 {
 526         struct net_device *dev = ndev;
 527         struct dentry *dir;
 528         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 529         char buf[10+IFNAMSIZ];
 530
 531         if (state != NETDEV_CHANGENAME)
 532                 return 0;
 533
 534         if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
 535                 return 0;
 536
 537         if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
 538                 return 0;
 539
 540         sprintf(buf, "netdev:%s", dev->name);
 541         dir = sdata->debugfsdir;
 542         if (!debugfs_rename(dir->d_parent, dir, dir->d_parent, buf))
 543                 printk(KERN_ERR "mac80211: debugfs: failed to rename debugfs "
 544                        "dir to %s\n", buf);
 545
 546         return 0;
 547 }
 548
 549 static struct notifier_block mac80211_debugfs_netdev_notifier = {
 550         .notifier_call = netdev_notify,
 551 };
 552
 553 void ieee80211_debugfs_netdev_init(void)
 554 {
 555         int err;
 556
 557         err = register_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
 558         if (err) {
 559                 printk(KERN_ERR
 560                        "mac80211: failed to install netdev notifier,"
 561                        " disabling per-netdev debugfs!\n");
 562         } else
 563                 notif_registered = 1;
 564 }
 565
 566 void ieee80211_debugfs_netdev_exit(void)
 567 {
 568         unregister_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
 569         notif_registered = 0;
 570 }