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 #define IEEE80211_IF_FMT(name, field, format_string)                    \
  45 static ssize_t ieee80211_if_fmt_##name(                                 \
  46         const struct ieee80211_sub_if_data *sdata, char *buf,           \
  47         int buflen)                                                     \
  48 {                                                                       \
  49         return scnprintf(buf, buflen, format_string, sdata->field);     \
  50 }
  51 #define IEEE80211_IF_FMT_DEC(name, field)                               \
  52                 IEEE80211_IF_FMT(name, field, "%d\n")
  53 #define IEEE80211_IF_FMT_HEX(name, field)                               \
  54                 IEEE80211_IF_FMT(name, field, "%#x\n")
  55 #define IEEE80211_IF_FMT_SIZE(name, field)                              \
  56                 IEEE80211_IF_FMT(name, field, "%zd\n")
  57
  58 #define IEEE80211_IF_FMT_ATOMIC(name, field)                            \
  59 static ssize_t ieee80211_if_fmt_##name(                                 \
  60         const struct ieee80211_sub_if_data *sdata,                      \
  61         char *buf, int buflen)                                          \
  62 {                                                                       \
  63         return scnprintf(buf, buflen, "%d\n", atomic_read(&sdata->field));\
  64 }
  65
  66 #define IEEE80211_IF_FMT_MAC(name, field)                               \
  67 static ssize_t ieee80211_if_fmt_##name(                                 \
  68         const struct ieee80211_sub_if_data *sdata, char *buf,           \
  69         int buflen)                                                     \
  70 {                                                                       \
  71         return scnprintf(buf, buflen, "%pM\n", sdata->field);           \
  72 }
  73
  74 #define __IEEE80211_IF_FILE(name)                                       \
  75 static ssize_t ieee80211_if_read_##name(struct file *file,              \
  76                                         char __user *userbuf,           \
  77                                         size_t count, loff_t *ppos)     \
  78 {                                                                       \
  79         return ieee80211_if_read(file->private_data,                    \
  80                                  userbuf, count, ppos,                  \
  81                                  ieee80211_if_fmt_##name);              \
  82 }                                                                       \
  83 static const struct file_operations name##_ops = {                      \
  84         .read = ieee80211_if_read_##name,                               \
  85         .open = mac80211_open_file_generic,                             \
  86 }
  87
  88 #define IEEE80211_IF_FILE(name, field, format)                          \
  89                 IEEE80211_IF_FMT_##format(name, field)                  \
  90                 __IEEE80211_IF_FILE(name)
  91
  92 /* common attributes */
  93 IEEE80211_IF_FILE(drop_unencrypted, drop_unencrypted, DEC);
  94 IEEE80211_IF_FILE(force_unicast_rateidx, force_unicast_rateidx, DEC);
  95 IEEE80211_IF_FILE(max_ratectrl_rateidx, max_ratectrl_rateidx, DEC);
  96
  97 /* STA attributes */
  98 IEEE80211_IF_FILE(bssid, u.mgd.bssid, MAC);
  99 IEEE80211_IF_FILE(aid, u.mgd.aid, DEC);
 100 IEEE80211_IF_FILE(capab, u.mgd.capab, HEX);
 101
 102 /* AP attributes */
 103 IEEE80211_IF_FILE(num_sta_ps, u.ap.num_sta_ps, ATOMIC);
 104 IEEE80211_IF_FILE(dtim_count, u.ap.dtim_count, DEC);
 105
 106 static ssize_t ieee80211_if_fmt_num_buffered_multicast(
 107         const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
 108 {
 109         return scnprintf(buf, buflen, "%u\n",
 110                          skb_queue_len(&sdata->u.ap.ps_bc_buf));
 111 }
 112 __IEEE80211_IF_FILE(num_buffered_multicast);
 113
 114 /* WDS attributes */
 115 IEEE80211_IF_FILE(peer, u.wds.remote_addr, MAC);
 116
 117 #ifdef CONFIG_MAC80211_MESH
 118 /* Mesh stats attributes */
 119 IEEE80211_IF_FILE(fwded_mcast, u.mesh.mshstats.fwded_mcast, DEC);
 120 IEEE80211_IF_FILE(fwded_unicast, u.mesh.mshstats.fwded_unicast, DEC);
 121 IEEE80211_IF_FILE(fwded_frames, u.mesh.mshstats.fwded_frames, DEC);
 122 IEEE80211_IF_FILE(dropped_frames_ttl, u.mesh.mshstats.dropped_frames_ttl, DEC);
 123 IEEE80211_IF_FILE(dropped_frames_no_route,
 124                 u.mesh.mshstats.dropped_frames_no_route, DEC);
 125 IEEE80211_IF_FILE(estab_plinks, u.mesh.mshstats.estab_plinks, ATOMIC);
 126
 127 /* Mesh parameters */
 128 IEEE80211_IF_FILE(dot11MeshMaxRetries,
 129                 u.mesh.mshcfg.dot11MeshMaxRetries, DEC);
 130 IEEE80211_IF_FILE(dot11MeshRetryTimeout,
 131                 u.mesh.mshcfg.dot11MeshRetryTimeout, DEC);
 132 IEEE80211_IF_FILE(dot11MeshConfirmTimeout,
 133                 u.mesh.mshcfg.dot11MeshConfirmTimeout, DEC);
 134 IEEE80211_IF_FILE(dot11MeshHoldingTimeout,
 135                 u.mesh.mshcfg.dot11MeshHoldingTimeout, DEC);
 136 IEEE80211_IF_FILE(dot11MeshTTL, u.mesh.mshcfg.dot11MeshTTL, DEC);
 137 IEEE80211_IF_FILE(auto_open_plinks, u.mesh.mshcfg.auto_open_plinks, DEC);
 138 IEEE80211_IF_FILE(dot11MeshMaxPeerLinks,
 139                 u.mesh.mshcfg.dot11MeshMaxPeerLinks, DEC);
 140 IEEE80211_IF_FILE(dot11MeshHWMPactivePathTimeout,
 141                 u.mesh.mshcfg.dot11MeshHWMPactivePathTimeout, DEC);
 142 IEEE80211_IF_FILE(dot11MeshHWMPpreqMinInterval,
 143                 u.mesh.mshcfg.dot11MeshHWMPpreqMinInterval, DEC);
 144 IEEE80211_IF_FILE(dot11MeshHWMPnetDiameterTraversalTime,
 145                 u.mesh.mshcfg.dot11MeshHWMPnetDiameterTraversalTime, DEC);
 146 IEEE80211_IF_FILE(dot11MeshHWMPmaxPREQretries,
 147                 u.mesh.mshcfg.dot11MeshHWMPmaxPREQretries, DEC);
 148 IEEE80211_IF_FILE(path_refresh_time,
 149                 u.mesh.mshcfg.path_refresh_time, DEC);
 150 IEEE80211_IF_FILE(min_discovery_timeout,
 151                 u.mesh.mshcfg.min_discovery_timeout, DEC);
 152 IEEE80211_IF_FILE(dot11MeshHWMPRootMode,
 153                 u.mesh.mshcfg.dot11MeshHWMPRootMode, DEC);
 154 #endif
 155
 156
 157 #define DEBUGFS_ADD(name, type) \
 158         debugfs_create_file(#name, 0400, sdata->debugfs.dir, \
 159                             sdata, &name##_ops);
 160
 161 static void add_sta_files(struct ieee80211_sub_if_data *sdata)
 162 {
 163         DEBUGFS_ADD(drop_unencrypted, sta);
 164         DEBUGFS_ADD(force_unicast_rateidx, sta);
 165         DEBUGFS_ADD(max_ratectrl_rateidx, sta);
 166
 167         DEBUGFS_ADD(bssid, sta);
 168         DEBUGFS_ADD(aid, sta);
 169         DEBUGFS_ADD(capab, sta);
 170 }
 171
 172 static void add_ap_files(struct ieee80211_sub_if_data *sdata)
 173 {
 174         DEBUGFS_ADD(drop_unencrypted, ap);
 175         DEBUGFS_ADD(force_unicast_rateidx, ap);
 176         DEBUGFS_ADD(max_ratectrl_rateidx, ap);
 177
 178         DEBUGFS_ADD(num_sta_ps, ap);
 179         DEBUGFS_ADD(dtim_count, ap);
 180         DEBUGFS_ADD(num_buffered_multicast, ap);
 181 }
 182
 183 static void add_wds_files(struct ieee80211_sub_if_data *sdata)
 184 {
 185         DEBUGFS_ADD(drop_unencrypted, wds);
 186         DEBUGFS_ADD(force_unicast_rateidx, wds);
 187         DEBUGFS_ADD(max_ratectrl_rateidx, wds);
 188
 189         DEBUGFS_ADD(peer, wds);
 190 }
 191
 192 static void add_vlan_files(struct ieee80211_sub_if_data *sdata)
 193 {
 194         DEBUGFS_ADD(drop_unencrypted, vlan);
 195         DEBUGFS_ADD(force_unicast_rateidx, vlan);
 196         DEBUGFS_ADD(max_ratectrl_rateidx, vlan);
 197 }
 198
 199 static void add_monitor_files(struct ieee80211_sub_if_data *sdata)
 200 {
 201 }
 202
 203 #ifdef CONFIG_MAC80211_MESH
 204
 205 static void add_mesh_stats(struct ieee80211_sub_if_data *sdata)
 206 {
 207         struct dentry *dir = debugfs_create_dir("mesh_stats",
 208                                                 sdata->debugfs.dir);
 209
 210 #define MESHSTATS_ADD(name)\
 211         debugfs_create_file(#name, 0400, dir, sdata, &name##_ops);
 212
 213         MESHSTATS_ADD(fwded_mcast);
 214         MESHSTATS_ADD(fwded_unicast);
 215         MESHSTATS_ADD(fwded_frames);
 216         MESHSTATS_ADD(dropped_frames_ttl);
 217         MESHSTATS_ADD(dropped_frames_no_route);
 218         MESHSTATS_ADD(estab_plinks);
 219 #undef MESHSTATS_ADD
 220 }
 221
 222 static void add_mesh_config(struct ieee80211_sub_if_data *sdata)
 223 {
 224         struct dentry *dir = debugfs_create_dir("mesh_config",
 225                                                 sdata->debugfs.dir);
 226
 227 #define MESHPARAMS_ADD(name) \
 228         debugfs_create_file(#name, 0600, dir, sdata, &name##_ops);
 229
 230         MESHPARAMS_ADD(dot11MeshMaxRetries);
 231         MESHPARAMS_ADD(dot11MeshRetryTimeout);
 232         MESHPARAMS_ADD(dot11MeshConfirmTimeout);
 233         MESHPARAMS_ADD(dot11MeshHoldingTimeout);
 234         MESHPARAMS_ADD(dot11MeshTTL);
 235         MESHPARAMS_ADD(auto_open_plinks);
 236         MESHPARAMS_ADD(dot11MeshMaxPeerLinks);
 237         MESHPARAMS_ADD(dot11MeshHWMPactivePathTimeout);
 238         MESHPARAMS_ADD(dot11MeshHWMPpreqMinInterval);
 239         MESHPARAMS_ADD(dot11MeshHWMPnetDiameterTraversalTime);
 240         MESHPARAMS_ADD(dot11MeshHWMPmaxPREQretries);
 241         MESHPARAMS_ADD(path_refresh_time);
 242         MESHPARAMS_ADD(min_discovery_timeout);
 243
 244 #undef MESHPARAMS_ADD
 245 }
 246 #endif
 247
 248 static void add_files(struct ieee80211_sub_if_data *sdata)
 249 {
 250         if (!sdata->debugfs.dir)
 251                 return;
 252
 253         switch (sdata->vif.type) {
 254         case NL80211_IFTYPE_MESH_POINT:
 255 #ifdef CONFIG_MAC80211_MESH
 256                 add_mesh_stats(sdata);
 257                 add_mesh_config(sdata);
 258 #endif
 259                 break;
 260         case NL80211_IFTYPE_STATION:
 261                 add_sta_files(sdata);
 262                 break;
 263         case NL80211_IFTYPE_ADHOC:
 264                 /* XXX */
 265                 break;
 266         case NL80211_IFTYPE_AP:
 267                 add_ap_files(sdata);
 268                 break;
 269         case NL80211_IFTYPE_WDS:
 270                 add_wds_files(sdata);
 271                 break;
 272         case NL80211_IFTYPE_MONITOR:
 273                 add_monitor_files(sdata);
 274                 break;
 275         case NL80211_IFTYPE_AP_VLAN:
 276                 add_vlan_files(sdata);
 277                 break;
 278         default:
 279                 break;
 280         }
 281 }
 282
 283 static int notif_registered;
 284
 285 void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata)
 286 {
 287         char buf[10+IFNAMSIZ];
 288
 289         if (!notif_registered)
 290                 return;
 291
 292         sprintf(buf, "netdev:%s", sdata->dev->name);
 293         sdata->debugfs.dir = debugfs_create_dir(buf,
 294                 sdata->local->hw.wiphy->debugfsdir);
 295         add_files(sdata);
 296 }
 297
 298 void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata)
 299 {
 300         if (!sdata->debugfs.dir)
 301                 return;
 302
 303         debugfs_remove_recursive(sdata->debugfs.dir);
 304         sdata->debugfs.dir = NULL;
 305 }
 306
 307 static int netdev_notify(struct notifier_block *nb,
 308                          unsigned long state,
 309                          void *ndev)
 310 {
 311         struct net_device *dev = ndev;
 312         struct dentry *dir;
 313         struct ieee80211_sub_if_data *sdata;
 314         char buf[10+IFNAMSIZ];
 315
 316         if (state != NETDEV_CHANGENAME)
 317                 return 0;
 318
 319         if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
 320                 return 0;
 321
 322         if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
 323                 return 0;
 324
 325         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 326
 327         dir = sdata->debugfs.dir;
 328
 329         if (!dir)
 330                 return 0;
 331
 332         sprintf(buf, "netdev:%s", dev->name);
 333         if (!debugfs_rename(dir->d_parent, dir, dir->d_parent, buf))
 334                 printk(KERN_ERR "mac80211: debugfs: failed to rename debugfs "
 335                        "dir to %s\n", buf);
 336
 337         return 0;
 338 }
 339
 340 static struct notifier_block mac80211_debugfs_netdev_notifier = {
 341         .notifier_call = netdev_notify,
 342 };
 343
 344 void ieee80211_debugfs_netdev_init(void)
 345 {
 346         int err;
 347
 348         err = register_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
 349         if (err) {
 350                 printk(KERN_ERR
 351                        "mac80211: failed to install netdev notifier,"
 352                        " disabling per-netdev debugfs!\n");
 353         } else
 354                 notif_registered = 1;
 355 }
 356
 357 void ieee80211_debugfs_netdev_exit(void)
 358 {
 359         unregister_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
 360         notif_registered = 0;
 361 }