package/mac80211/src/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 "ieee80211_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                 ret = simple_read_from_buffer(userbuf, count, ppos, buf, ret);
  37         }
  38         read_unlock(&dev_base_lock);
  39         return ret;
  40 }
  41
  42 #define IEEE80211_IF_FMT(name, field, format_string)                    \
  43 static ssize_t ieee80211_if_fmt_##name(                                 \
  44         const struct ieee80211_sub_if_data *sdata, char *buf,           \
  45         int buflen)                                                     \
  46 {                                                                       \
  47         return scnprintf(buf, buflen, format_string, sdata->field);     \
  48 }
  49 #define IEEE80211_IF_FMT_DEC(name, field)                               \
  50                 IEEE80211_IF_FMT(name, field, "%d\n")
  51 #define IEEE80211_IF_FMT_HEX(name, field)                               \
  52                 IEEE80211_IF_FMT(name, field, "%#x\n")
  53 #define IEEE80211_IF_FMT_SIZE(name, field)                              \
  54                 IEEE80211_IF_FMT(name, field, "%zd\n")
  55
  56 #define IEEE80211_IF_FMT_ATOMIC(name, field)                            \
  57 static ssize_t ieee80211_if_fmt_##name(                                 \
  58         const struct ieee80211_sub_if_data *sdata,                      \
  59         char *buf, int buflen)                                          \
  60 {                                                                       \
  61         return scnprintf(buf, buflen, "%d\n", atomic_read(&sdata->field));\
  62 }
  63
  64 #define IEEE80211_IF_FMT_MAC(name, field)                               \
  65 static ssize_t ieee80211_if_fmt_##name(                                 \
  66         const struct ieee80211_sub_if_data *sdata, char *buf,           \
  67         int buflen)                                                     \
  68 {                                                                       \
  69         return scnprintf(buf, buflen, MAC_FMT "\n", MAC_ARG(sdata->field));\
  70 }
  71
  72 #define __IEEE80211_IF_FILE(name)                                       \
  73 static ssize_t ieee80211_if_read_##name(struct file *file,              \
  74                                         char __user *userbuf,           \
  75                                         size_t count, loff_t *ppos)     \
  76 {                                                                       \
  77         return ieee80211_if_read(file->private_data,                    \
  78                                  userbuf, count, ppos,                  \
  79                                  ieee80211_if_fmt_##name);              \
  80 }                                                                       \
  81 static const struct file_operations name##_ops = {                      \
  82         .read = ieee80211_if_read_##name,                               \
  83         .open = mac80211_open_file_generic,                             \
  84 }
  85
  86 #define IEEE80211_IF_FILE(name, field, format)                          \
  87                 IEEE80211_IF_FMT_##format(name, field)                  \
  88                 __IEEE80211_IF_FILE(name)
  89
  90 /* common attributes */
  91 IEEE80211_IF_FILE(channel_use, channel_use, DEC);
  92 IEEE80211_IF_FILE(drop_unencrypted, drop_unencrypted, DEC);
  93 IEEE80211_IF_FILE(eapol, eapol, DEC);
  94 IEEE80211_IF_FILE(ieee8021_x, ieee802_1x, DEC);
  95
  96 /* STA/IBSS attributes */
  97 IEEE80211_IF_FILE(state, u.sta.state, DEC);
  98 IEEE80211_IF_FILE(bssid, u.sta.bssid, MAC);
  99 IEEE80211_IF_FILE(prev_bssid, u.sta.prev_bssid, MAC);
 100 IEEE80211_IF_FILE(ssid_len, u.sta.ssid_len, SIZE);
 101 IEEE80211_IF_FILE(aid, u.sta.aid, DEC);
 102 IEEE80211_IF_FILE(ap_capab, u.sta.ap_capab, HEX);
 103 IEEE80211_IF_FILE(capab, u.sta.capab, HEX);
 104 IEEE80211_IF_FILE(extra_ie_len, u.sta.extra_ie_len, SIZE);
 105 IEEE80211_IF_FILE(auth_tries, u.sta.auth_tries, DEC);
 106 IEEE80211_IF_FILE(assoc_tries, u.sta.assoc_tries, DEC);
 107 IEEE80211_IF_FILE(auth_algs, u.sta.auth_algs, HEX);
 108 IEEE80211_IF_FILE(auth_alg, u.sta.auth_alg, DEC);
 109 IEEE80211_IF_FILE(auth_transaction, u.sta.auth_transaction, DEC);
 110
 111 static ssize_t ieee80211_if_fmt_flags(
 112         const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
 113 {
 114         return scnprintf(buf, buflen, "%s%s%s%s%s%s%s\n",
 115                  sdata->u.sta.flags & IEEE80211_STA_SSID_SET ? "SSID\n" : "",
 116                  sdata->u.sta.flags & IEEE80211_STA_BSSID_SET ? "BSSID\n" : "",
 117                  sdata->u.sta.flags & IEEE80211_STA_PREV_BSSID_SET ? "prev BSSID\n" : "",
 118                  sdata->u.sta.flags & IEEE80211_STA_AUTHENTICATED ? "AUTH\n" : "",
 119                  sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED ? "ASSOC\n" : "",
 120                  sdata->u.sta.flags & IEEE80211_STA_PROBEREQ_POLL ? "PROBEREQ POLL\n" : "",
 121                  sdata->flags & IEEE80211_SDATA_USE_PROTECTION ? "CTS prot\n" : "");
 122 }
 123 __IEEE80211_IF_FILE(flags);
 124
 125 /* AP attributes */
 126 IEEE80211_IF_FILE(num_sta_ps, u.ap.num_sta_ps, ATOMIC);
 127 IEEE80211_IF_FILE(dtim_period, u.ap.dtim_period, DEC);
 128 IEEE80211_IF_FILE(dtim_count, u.ap.dtim_count, DEC);
 129 IEEE80211_IF_FILE(num_beacons, u.ap.num_beacons, DEC);
 130 IEEE80211_IF_FILE(force_unicast_rateidx, u.ap.force_unicast_rateidx, DEC);
 131 IEEE80211_IF_FILE(max_ratectrl_rateidx, u.ap.max_ratectrl_rateidx, DEC);
 132
 133 static ssize_t ieee80211_if_fmt_num_buffered_multicast(
 134         const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
 135 {
 136         return scnprintf(buf, buflen, "%u\n",
 137                          skb_queue_len(&sdata->u.ap.ps_bc_buf));
 138 }
 139 __IEEE80211_IF_FILE(num_buffered_multicast);
 140
 141 static ssize_t ieee80211_if_fmt_beacon_head_len(
 142         const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
 143 {
 144         if (sdata->u.ap.beacon_head)
 145                 return scnprintf(buf, buflen, "%d\n",
 146                                  sdata->u.ap.beacon_head_len);
 147         return scnprintf(buf, buflen, "\n");
 148 }
 149 __IEEE80211_IF_FILE(beacon_head_len);
 150
 151 static ssize_t ieee80211_if_fmt_beacon_tail_len(
 152         const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
 153 {
 154         if (sdata->u.ap.beacon_tail)
 155                 return scnprintf(buf, buflen, "%d\n",
 156                                  sdata->u.ap.beacon_tail_len);
 157         return scnprintf(buf, buflen, "\n");
 158 }
 159 __IEEE80211_IF_FILE(beacon_tail_len);
 160
 161 /* WDS attributes */
 162 IEEE80211_IF_FILE(peer, u.wds.remote_addr, MAC);
 163
 164 #define DEBUGFS_ADD(name, type)\
 165         sdata->debugfs.type.name = debugfs_create_file(#name, 0444,\
 166                 sdata->debugfsdir, sdata, &name##_ops);
 167
 168 static void add_sta_files(struct ieee80211_sub_if_data *sdata)
 169 {
 170         DEBUGFS_ADD(channel_use, sta);
 171         DEBUGFS_ADD(drop_unencrypted, sta);
 172         DEBUGFS_ADD(eapol, sta);
 173         DEBUGFS_ADD(ieee8021_x, sta);
 174         DEBUGFS_ADD(state, sta);
 175         DEBUGFS_ADD(bssid, sta);
 176         DEBUGFS_ADD(prev_bssid, sta);
 177         DEBUGFS_ADD(ssid_len, sta);
 178         DEBUGFS_ADD(aid, sta);
 179         DEBUGFS_ADD(ap_capab, sta);
 180         DEBUGFS_ADD(capab, sta);
 181         DEBUGFS_ADD(extra_ie_len, sta);
 182         DEBUGFS_ADD(auth_tries, sta);
 183         DEBUGFS_ADD(assoc_tries, sta);
 184         DEBUGFS_ADD(auth_algs, sta);
 185         DEBUGFS_ADD(auth_alg, sta);
 186         DEBUGFS_ADD(auth_transaction, sta);
 187         DEBUGFS_ADD(flags, sta);
 188 }
 189
 190 static void add_ap_files(struct ieee80211_sub_if_data *sdata)
 191 {
 192         DEBUGFS_ADD(channel_use, ap);
 193         DEBUGFS_ADD(drop_unencrypted, ap);
 194         DEBUGFS_ADD(eapol, ap);
 195         DEBUGFS_ADD(ieee8021_x, ap);
 196         DEBUGFS_ADD(num_sta_ps, ap);
 197         DEBUGFS_ADD(dtim_period, ap);
 198         DEBUGFS_ADD(dtim_count, ap);
 199         DEBUGFS_ADD(num_beacons, ap);
 200         DEBUGFS_ADD(force_unicast_rateidx, ap);
 201         DEBUGFS_ADD(max_ratectrl_rateidx, ap);
 202         DEBUGFS_ADD(num_buffered_multicast, ap);
 203         DEBUGFS_ADD(beacon_head_len, ap);
 204         DEBUGFS_ADD(beacon_tail_len, ap);
 205 }
 206
 207 static void add_wds_files(struct ieee80211_sub_if_data *sdata)
 208 {
 209         DEBUGFS_ADD(channel_use, wds);
 210         DEBUGFS_ADD(drop_unencrypted, wds);
 211         DEBUGFS_ADD(eapol, wds);
 212         DEBUGFS_ADD(ieee8021_x, wds);
 213         DEBUGFS_ADD(peer, wds);
 214 }
 215
 216 static void add_vlan_files(struct ieee80211_sub_if_data *sdata)
 217 {
 218         DEBUGFS_ADD(channel_use, vlan);
 219         DEBUGFS_ADD(drop_unencrypted, vlan);
 220         DEBUGFS_ADD(eapol, vlan);
 221         DEBUGFS_ADD(ieee8021_x, vlan);
 222 }
 223
 224 static void add_monitor_files(struct ieee80211_sub_if_data *sdata)
 225 {
 226 }
 227
 228 static void add_files(struct ieee80211_sub_if_data *sdata)
 229 {
 230         if (!sdata->debugfsdir)
 231                 return;
 232
 233         switch (sdata->type) {
 234         case IEEE80211_IF_TYPE_STA:
 235         case IEEE80211_IF_TYPE_IBSS:
 236                 add_sta_files(sdata);
 237                 break;
 238         case IEEE80211_IF_TYPE_AP:
 239                 add_ap_files(sdata);
 240                 break;
 241         case IEEE80211_IF_TYPE_WDS:
 242                 add_wds_files(sdata);
 243                 break;
 244         case IEEE80211_IF_TYPE_MNTR:
 245                 add_monitor_files(sdata);
 246                 break;
 247         case IEEE80211_IF_TYPE_VLAN:
 248                 add_vlan_files(sdata);
 249                 break;
 250         default:
 251                 break;
 252         }
 253 }
 254
 255 #define DEBUGFS_DEL(name, type)                                 \
 256         do {                                                    \
 257                 debugfs_remove(sdata->debugfs.type.name);       \
 258                 sdata->debugfs.type.name = NULL;                \
 259         } while (0)
 260
 261 static void del_sta_files(struct ieee80211_sub_if_data *sdata)
 262 {
 263         DEBUGFS_DEL(channel_use, sta);
 264         DEBUGFS_DEL(drop_unencrypted, sta);
 265         DEBUGFS_DEL(eapol, sta);
 266         DEBUGFS_DEL(ieee8021_x, sta);
 267         DEBUGFS_DEL(state, sta);
 268         DEBUGFS_DEL(bssid, sta);
 269         DEBUGFS_DEL(prev_bssid, sta);
 270         DEBUGFS_DEL(ssid_len, sta);
 271         DEBUGFS_DEL(aid, sta);
 272         DEBUGFS_DEL(ap_capab, sta);
 273         DEBUGFS_DEL(capab, sta);
 274         DEBUGFS_DEL(extra_ie_len, sta);
 275         DEBUGFS_DEL(auth_tries, sta);
 276         DEBUGFS_DEL(assoc_tries, sta);
 277         DEBUGFS_DEL(auth_algs, sta);
 278         DEBUGFS_DEL(auth_alg, sta);
 279         DEBUGFS_DEL(auth_transaction, sta);
 280         DEBUGFS_DEL(flags, sta);
 281 }
 282
 283 static void del_ap_files(struct ieee80211_sub_if_data *sdata)
 284 {
 285         DEBUGFS_DEL(channel_use, ap);
 286         DEBUGFS_DEL(drop_unencrypted, ap);
 287         DEBUGFS_DEL(eapol, ap);
 288         DEBUGFS_DEL(ieee8021_x, ap);
 289         DEBUGFS_DEL(num_sta_ps, ap);
 290         DEBUGFS_DEL(dtim_period, ap);
 291         DEBUGFS_DEL(dtim_count, ap);
 292         DEBUGFS_DEL(num_beacons, ap);
 293         DEBUGFS_DEL(force_unicast_rateidx, ap);
 294         DEBUGFS_DEL(max_ratectrl_rateidx, ap);
 295         DEBUGFS_DEL(num_buffered_multicast, ap);
 296         DEBUGFS_DEL(beacon_head_len, ap);
 297         DEBUGFS_DEL(beacon_tail_len, ap);
 298 }
 299
 300 static void del_wds_files(struct ieee80211_sub_if_data *sdata)
 301 {
 302         DEBUGFS_DEL(channel_use, wds);
 303         DEBUGFS_DEL(drop_unencrypted, wds);
 304         DEBUGFS_DEL(eapol, wds);
 305         DEBUGFS_DEL(ieee8021_x, wds);
 306         DEBUGFS_DEL(peer, wds);
 307 }
 308
 309 static void del_vlan_files(struct ieee80211_sub_if_data *sdata)
 310 {
 311         DEBUGFS_DEL(channel_use, vlan);
 312         DEBUGFS_DEL(drop_unencrypted, vlan);
 313         DEBUGFS_DEL(eapol, vlan);
 314         DEBUGFS_DEL(ieee8021_x, vlan);
 315 }
 316
 317 static void del_monitor_files(struct ieee80211_sub_if_data *sdata)
 318 {
 319 }
 320
 321 static void del_files(struct ieee80211_sub_if_data *sdata, int type)
 322 {
 323         if (!sdata->debugfsdir)
 324                 return;
 325
 326         switch (type) {
 327         case IEEE80211_IF_TYPE_STA:
 328         case IEEE80211_IF_TYPE_IBSS:
 329                 del_sta_files(sdata);
 330                 break;
 331         case IEEE80211_IF_TYPE_AP:
 332                 del_ap_files(sdata);
 333                 break;
 334         case IEEE80211_IF_TYPE_WDS:
 335                 del_wds_files(sdata);
 336                 break;
 337         case IEEE80211_IF_TYPE_MNTR:
 338                 del_monitor_files(sdata);
 339                 break;
 340         case IEEE80211_IF_TYPE_VLAN:
 341                 del_vlan_files(sdata);
 342                 break;
 343         default:
 344                 break;
 345         }
 346 }
 347
 348 static int notif_registered;
 349
 350 void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata)
 351 {
 352         char buf[10+IFNAMSIZ];
 353
 354         if (!notif_registered)
 355                 return;
 356
 357         sprintf(buf, "netdev:%s", sdata->dev->name);
 358         sdata->debugfsdir = debugfs_create_dir(buf,
 359                 sdata->local->hw.wiphy->debugfsdir);
 360 }
 361
 362 void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata)
 363 {
 364         del_files(sdata, sdata->type);
 365         debugfs_remove(sdata->debugfsdir);
 366         sdata->debugfsdir = NULL;
 367 }
 368
 369 void ieee80211_debugfs_change_if_type(struct ieee80211_sub_if_data *sdata,
 370                                       int oldtype)
 371 {
 372         del_files(sdata, oldtype);
 373         add_files(sdata);
 374 }
 375
 376 static int netdev_notify(struct notifier_block * nb,
 377                          unsigned long state,
 378                          void *ndev)
 379 {
 380         struct net_device *dev = ndev;
 381         struct dentry *dir;
 382         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 383         char buf[10+IFNAMSIZ];
 384
 385         if (state != NETDEV_CHANGENAME)
 386                 return 0;
 387
 388         if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
 389                 return 0;
 390
 391         if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
 392                 return 0;
 393
 394         sprintf(buf, "netdev:%s", dev->name);
 395         dir = sdata->debugfsdir;
 396         if (!debugfs_rename(dir->d_parent, dir, dir->d_parent, buf))
 397                 printk(KERN_ERR "mac80211: debugfs: failed to rename debugfs "
 398                        "dir to %s\n", buf);
 399
 400         return 0;
 401 }
 402
 403 static struct notifier_block mac80211_debugfs_netdev_notifier = {
 404         .notifier_call = netdev_notify,
 405 };
 406
 407 void ieee80211_debugfs_netdev_init(void)
 408 {
 409         int err;
 410
 411         err = register_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
 412         if (err) {
 413                 printk(KERN_ERR
 414                        "mac80211: failed to install netdev notifier,"
 415                        " disabling per-netdev debugfs!\n");
 416         } else
 417                 notif_registered = 1;
 418 }
 419
 420 void ieee80211_debugfs_netdev_exit(void)
 421 {
 422         unregister_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
 423         notif_registered = 0;
 424 }