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 static ssize_t ieee80211_if_write(
  45         struct ieee80211_sub_if_data *sdata,
  46         const char __user *userbuf,
  47         size_t count, loff_t *ppos,
  48         ssize_t (*write)(struct ieee80211_sub_if_data *, const char *, int))
  49 {
  50         u8 *buf;
  51         ssize_t ret = -ENODEV;
  52
  53         buf = kzalloc(count, GFP_KERNEL);
  54         if (!buf)
  55                 return -ENOMEM;
  56
  57         if (copy_from_user(buf, userbuf, count))
  58                 return -EFAULT;
  59
  60         rtnl_lock();
  61         if (sdata->dev->reg_state == NETREG_REGISTERED)
  62                 ret = (*write)(sdata, buf, count);
  63         rtnl_unlock();
  64
  65         return ret;
  66 }
  67
  68 #define IEEE80211_IF_FMT(name, field, format_string)                    \
  69 static ssize_t ieee80211_if_fmt_##name(                                 \
  70         const struct ieee80211_sub_if_data *sdata, char *buf,           \
  71         int buflen)                                                     \
  72 {                                                                       \
  73         return scnprintf(buf, buflen, format_string, sdata->field);     \
  74 }
  75 #define IEEE80211_IF_FMT_DEC(name, field)                               \
  76                 IEEE80211_IF_FMT(name, field, "%d\n")
  77 #define IEEE80211_IF_FMT_HEX(name, field)                               \
  78                 IEEE80211_IF_FMT(name, field, "%#x\n")
  79 #define IEEE80211_IF_FMT_SIZE(name, field)                              \
  80                 IEEE80211_IF_FMT(name, field, "%zd\n")
  81
  82 #define IEEE80211_IF_FMT_ATOMIC(name, field)                            \
  83 static ssize_t ieee80211_if_fmt_##name(                                 \
  84         const struct ieee80211_sub_if_data *sdata,                      \
  85         char *buf, int buflen)                                          \
  86 {                                                                       \
  87         return scnprintf(buf, buflen, "%d\n", atomic_read(&sdata->field));\
  88 }
  89
  90 #define IEEE80211_IF_FMT_MAC(name, field)                               \
  91 static ssize_t ieee80211_if_fmt_##name(                                 \
  92         const struct ieee80211_sub_if_data *sdata, char *buf,           \
  93         int buflen)                                                     \
  94 {                                                                       \
  95         return scnprintf(buf, buflen, "%pM\n", sdata->field);           \
  96 }
  97
  98 #define __IEEE80211_IF_FILE(name, _write)                               \
  99 static ssize_t ieee80211_if_read_##name(struct file *file,              \
 100                                         char __user *userbuf,           \
 101                                         size_t count, loff_t *ppos)     \
 102 {                                                                       \
 103         return ieee80211_if_read(file->private_data,                    \
 104                                  userbuf, count, ppos,                  \
 105                                  ieee80211_if_fmt_##name);              \
 106 }                                                                       \
 107 static const struct file_operations name##_ops = {                      \
 108         .read = ieee80211_if_read_##name,                               \
 109         .write = (_write),                                              \
 110         .open = mac80211_open_file_generic,                             \
 111 }
 112
 113 #define __IEEE80211_IF_FILE_W(name)                                     \
 114 static ssize_t ieee80211_if_write_##name(struct file *file,             \
 115                                          const char __user *userbuf,    \
 116                                          size_t count, loff_t *ppos)    \
 117 {                                                                       \
 118         return ieee80211_if_write(file->private_data, userbuf, count,   \
 119                                   ppos, ieee80211_if_parse_##name);     \
 120 }                                                                       \
 121 __IEEE80211_IF_FILE(name, ieee80211_if_write_##name)
 122
 123
 124 #define IEEE80211_IF_FILE(name, field, format)                          \
 125                 IEEE80211_IF_FMT_##format(name, field)                  \
 126                 __IEEE80211_IF_FILE(name, NULL)
 127
 128 /* common attributes */
 129 IEEE80211_IF_FILE(drop_unencrypted, drop_unencrypted, DEC);
 130 IEEE80211_IF_FILE(force_unicast_rateidx, force_unicast_rateidx, DEC);
 131 IEEE80211_IF_FILE(max_ratectrl_rateidx, max_ratectrl_rateidx, DEC);
 132
 133 /* STA attributes */
 134 IEEE80211_IF_FILE(bssid, u.mgd.bssid, MAC);
 135 IEEE80211_IF_FILE(aid, u.mgd.aid, DEC);
 136
 137 static int ieee80211_set_smps(struct ieee80211_sub_if_data *sdata,
 138                               enum ieee80211_smps_mode smps_mode)
 139 {
 140         struct ieee80211_local *local = sdata->local;
 141         int err;
 142
 143         if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_STATIC_SMPS) &&
 144             smps_mode == IEEE80211_SMPS_STATIC)
 145                 return -EINVAL;
 146
 147         /* auto should be dynamic if in PS mode */
 148         if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS) &&
 149             (smps_mode == IEEE80211_SMPS_DYNAMIC ||
 150              smps_mode == IEEE80211_SMPS_AUTOMATIC))
 151                 return -EINVAL;
 152
 153         /* supported only on managed interfaces for now */
 154         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 155                 return -EOPNOTSUPP;
 156
 157         mutex_lock(&local->iflist_mtx);
 158         err = __ieee80211_request_smps(sdata, smps_mode);
 159         mutex_unlock(&local->iflist_mtx);
 160
 161         return err;
 162 }
 163
 164 static const char *smps_modes[IEEE80211_SMPS_NUM_MODES] = {
 165         [IEEE80211_SMPS_AUTOMATIC] = "auto",
 166         [IEEE80211_SMPS_OFF] = "off",
 167         [IEEE80211_SMPS_STATIC] = "static",
 168         [IEEE80211_SMPS_DYNAMIC] = "dynamic",
 169 };
 170
 171 static ssize_t ieee80211_if_fmt_smps(const struct ieee80211_sub_if_data *sdata,
 172                                      char *buf, int buflen)
 173 {
 174         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 175                 return -EOPNOTSUPP;
 176
 177         return snprintf(buf, buflen, "request: %s\nused: %s\n",
 178                         smps_modes[sdata->u.mgd.req_smps],
 179                         smps_modes[sdata->u.mgd.ap_smps]);
 180 }
 181
 182 static ssize_t ieee80211_if_parse_smps(struct ieee80211_sub_if_data *sdata,
 183                                        const char *buf, int buflen)
 184 {
 185         enum ieee80211_smps_mode mode;
 186
 187         for (mode = 0; mode < IEEE80211_SMPS_NUM_MODES; mode++) {
 188                 if (strncmp(buf, smps_modes[mode], buflen) == 0) {
 189                         int err = ieee80211_set_smps(sdata, mode);
 190                         if (!err)
 191                                 return buflen;
 192                         return err;
 193                 }
 194         }
 195
 196         return -EINVAL;
 197 }
 198
 199 __IEEE80211_IF_FILE_W(smps);
 200
 201 /* AP attributes */
 202 IEEE80211_IF_FILE(num_sta_ps, u.ap.num_sta_ps, ATOMIC);
 203 IEEE80211_IF_FILE(dtim_count, u.ap.dtim_count, DEC);
 204
 205 static ssize_t ieee80211_if_fmt_num_buffered_multicast(
 206         const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
 207 {
 208         return scnprintf(buf, buflen, "%u\n",
 209                          skb_queue_len(&sdata->u.ap.ps_bc_buf));
 210 }
 211 __IEEE80211_IF_FILE(num_buffered_multicast, NULL);
 212
 213 /* WDS attributes */
 214 IEEE80211_IF_FILE(peer, u.wds.remote_addr, MAC);
 215
 216 #ifdef CONFIG_MAC80211_MESH
 217 /* Mesh stats attributes */
 218 IEEE80211_IF_FILE(fwded_mcast, u.mesh.mshstats.fwded_mcast, DEC);
 219 IEEE80211_IF_FILE(fwded_unicast, u.mesh.mshstats.fwded_unicast, DEC);
 220 IEEE80211_IF_FILE(fwded_frames, u.mesh.mshstats.fwded_frames, DEC);
 221 IEEE80211_IF_FILE(dropped_frames_ttl, u.mesh.mshstats.dropped_frames_ttl, DEC);
 222 IEEE80211_IF_FILE(dropped_frames_no_route,
 223                 u.mesh.mshstats.dropped_frames_no_route, DEC);
 224 IEEE80211_IF_FILE(estab_plinks, u.mesh.mshstats.estab_plinks, ATOMIC);
 225
 226 /* Mesh parameters */
 227 IEEE80211_IF_FILE(dot11MeshMaxRetries,
 228                 u.mesh.mshcfg.dot11MeshMaxRetries, DEC);
 229 IEEE80211_IF_FILE(dot11MeshRetryTimeout,
 230                 u.mesh.mshcfg.dot11MeshRetryTimeout, DEC);
 231 IEEE80211_IF_FILE(dot11MeshConfirmTimeout,
 232                 u.mesh.mshcfg.dot11MeshConfirmTimeout, DEC);
 233 IEEE80211_IF_FILE(dot11MeshHoldingTimeout,
 234                 u.mesh.mshcfg.dot11MeshHoldingTimeout, DEC);
 235 IEEE80211_IF_FILE(dot11MeshTTL, u.mesh.mshcfg.dot11MeshTTL, DEC);
 236 IEEE80211_IF_FILE(auto_open_plinks, u.mesh.mshcfg.auto_open_plinks, DEC);
 237 IEEE80211_IF_FILE(dot11MeshMaxPeerLinks,
 238                 u.mesh.mshcfg.dot11MeshMaxPeerLinks, DEC);
 239 IEEE80211_IF_FILE(dot11MeshHWMPactivePathTimeout,
 240                 u.mesh.mshcfg.dot11MeshHWMPactivePathTimeout, DEC);
 241 IEEE80211_IF_FILE(dot11MeshHWMPpreqMinInterval,
 242                 u.mesh.mshcfg.dot11MeshHWMPpreqMinInterval, DEC);
 243 IEEE80211_IF_FILE(dot11MeshHWMPnetDiameterTraversalTime,
 244                 u.mesh.mshcfg.dot11MeshHWMPnetDiameterTraversalTime, DEC);
 245 IEEE80211_IF_FILE(dot11MeshHWMPmaxPREQretries,
 246                 u.mesh.mshcfg.dot11MeshHWMPmaxPREQretries, DEC);
 247 IEEE80211_IF_FILE(path_refresh_time,
 248                 u.mesh.mshcfg.path_refresh_time, DEC);
 249 IEEE80211_IF_FILE(min_discovery_timeout,
 250                 u.mesh.mshcfg.min_discovery_timeout, DEC);
 251 IEEE80211_IF_FILE(dot11MeshHWMPRootMode,
 252                 u.mesh.mshcfg.dot11MeshHWMPRootMode, DEC);
 253 #endif
 254
 255
 256 #define DEBUGFS_ADD(name, type) \
 257         debugfs_create_file(#name, 0400, sdata->debugfs.dir, \
 258                             sdata, &name##_ops);
 259
 260 #define DEBUGFS_ADD_MODE(name, mode) \
 261         debugfs_create_file(#name, mode, sdata->debugfs.dir, \
 262                             sdata, &name##_ops);
 263
 264 static void add_sta_files(struct ieee80211_sub_if_data *sdata)
 265 {
 266         DEBUGFS_ADD(drop_unencrypted, sta);
 267         DEBUGFS_ADD(force_unicast_rateidx, sta);
 268         DEBUGFS_ADD(max_ratectrl_rateidx, sta);
 269
 270         DEBUGFS_ADD(bssid, sta);
 271         DEBUGFS_ADD(aid, sta);
 272         DEBUGFS_ADD_MODE(smps, 0600);
 273 }
 274
 275 static void add_ap_files(struct ieee80211_sub_if_data *sdata)
 276 {
 277         DEBUGFS_ADD(drop_unencrypted, ap);
 278         DEBUGFS_ADD(force_unicast_rateidx, ap);
 279         DEBUGFS_ADD(max_ratectrl_rateidx, ap);
 280
 281         DEBUGFS_ADD(num_sta_ps, ap);
 282         DEBUGFS_ADD(dtim_count, ap);
 283         DEBUGFS_ADD(num_buffered_multicast, ap);
 284 }
 285
 286 static void add_wds_files(struct ieee80211_sub_if_data *sdata)
 287 {
 288         DEBUGFS_ADD(drop_unencrypted, wds);
 289         DEBUGFS_ADD(force_unicast_rateidx, wds);
 290         DEBUGFS_ADD(max_ratectrl_rateidx, wds);
 291
 292         DEBUGFS_ADD(peer, wds);
 293 }
 294
 295 static void add_vlan_files(struct ieee80211_sub_if_data *sdata)
 296 {
 297         DEBUGFS_ADD(drop_unencrypted, vlan);
 298         DEBUGFS_ADD(force_unicast_rateidx, vlan);
 299         DEBUGFS_ADD(max_ratectrl_rateidx, vlan);
 300 }
 301
 302 static void add_monitor_files(struct ieee80211_sub_if_data *sdata)
 303 {
 304 }
 305
 306 #ifdef CONFIG_MAC80211_MESH
 307
 308 static void add_mesh_stats(struct ieee80211_sub_if_data *sdata)
 309 {
 310         struct dentry *dir = debugfs_create_dir("mesh_stats",
 311                                                 sdata->debugfs.dir);
 312
 313 #define MESHSTATS_ADD(name)\
 314         debugfs_create_file(#name, 0400, dir, sdata, &name##_ops);
 315
 316         MESHSTATS_ADD(fwded_mcast);
 317         MESHSTATS_ADD(fwded_unicast);
 318         MESHSTATS_ADD(fwded_frames);
 319         MESHSTATS_ADD(dropped_frames_ttl);
 320         MESHSTATS_ADD(dropped_frames_no_route);
 321         MESHSTATS_ADD(estab_plinks);
 322 #undef MESHSTATS_ADD
 323 }
 324
 325 static void add_mesh_config(struct ieee80211_sub_if_data *sdata)
 326 {
 327         struct dentry *dir = debugfs_create_dir("mesh_config",
 328                                                 sdata->debugfs.dir);
 329
 330 #define MESHPARAMS_ADD(name) \
 331         debugfs_create_file(#name, 0600, dir, sdata, &name##_ops);
 332
 333         MESHPARAMS_ADD(dot11MeshMaxRetries);
 334         MESHPARAMS_ADD(dot11MeshRetryTimeout);
 335         MESHPARAMS_ADD(dot11MeshConfirmTimeout);
 336         MESHPARAMS_ADD(dot11MeshHoldingTimeout);
 337         MESHPARAMS_ADD(dot11MeshTTL);
 338         MESHPARAMS_ADD(auto_open_plinks);
 339         MESHPARAMS_ADD(dot11MeshMaxPeerLinks);
 340         MESHPARAMS_ADD(dot11MeshHWMPactivePathTimeout);
 341         MESHPARAMS_ADD(dot11MeshHWMPpreqMinInterval);
 342         MESHPARAMS_ADD(dot11MeshHWMPnetDiameterTraversalTime);
 343         MESHPARAMS_ADD(dot11MeshHWMPmaxPREQretries);
 344         MESHPARAMS_ADD(path_refresh_time);
 345         MESHPARAMS_ADD(min_discovery_timeout);
 346
 347 #undef MESHPARAMS_ADD
 348 }
 349 #endif
 350
 351 static void add_files(struct ieee80211_sub_if_data *sdata)
 352 {
 353         if (!sdata->debugfs.dir)
 354                 return;
 355
 356         switch (sdata->vif.type) {
 357         case NL80211_IFTYPE_MESH_POINT:
 358 #ifdef CONFIG_MAC80211_MESH
 359                 add_mesh_stats(sdata);
 360                 add_mesh_config(sdata);
 361 #endif
 362                 break;
 363         case NL80211_IFTYPE_STATION:
 364                 add_sta_files(sdata);
 365                 break;
 366         case NL80211_IFTYPE_ADHOC:
 367                 /* XXX */
 368                 break;
 369         case NL80211_IFTYPE_AP:
 370                 add_ap_files(sdata);
 371                 break;
 372         case NL80211_IFTYPE_WDS:
 373                 add_wds_files(sdata);
 374                 break;
 375         case NL80211_IFTYPE_MONITOR:
 376                 add_monitor_files(sdata);
 377                 break;
 378         case NL80211_IFTYPE_AP_VLAN:
 379                 add_vlan_files(sdata);
 380                 break;
 381         default:
 382                 break;
 383         }
 384 }
 385
 386 void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata)
 387 {
 388         char buf[10+IFNAMSIZ];
 389
 390         sprintf(buf, "netdev:%s", sdata->name);
 391         sdata->debugfs.dir = debugfs_create_dir(buf,
 392                 sdata->local->hw.wiphy->debugfsdir);
 393         add_files(sdata);
 394 }
 395
 396 void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata)
 397 {
 398         if (!sdata->debugfs.dir)
 399                 return;
 400
 401         debugfs_remove_recursive(sdata->debugfs.dir);
 402         sdata->debugfs.dir = NULL;
 403 }
 404
 405 void ieee80211_debugfs_rename_netdev(struct ieee80211_sub_if_data *sdata)
 406 {
 407         struct dentry *dir;
 408         char buf[10 + IFNAMSIZ];
 409
 410         dir = sdata->debugfs.dir;
 411
 412         if (!dir)
 413                 return;
 414
 415         sprintf(buf, "netdev:%s", sdata->name);
 416         if (!debugfs_rename(dir->d_parent, dir, dir->d_parent, buf))
 417                 printk(KERN_ERR "mac80211: debugfs: failed to rename debugfs "
 418                        "dir to %s\n", buf);
 419 }