SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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;
  52
  53         buf = kmalloc(count, GFP_KERNEL);
  54         if (!buf)
  55                 return -ENOMEM;
  56
  57         ret = -EFAULT;
  58         if (copy_from_user(buf, userbuf, count))
  59                 goto freebuf;
  60
  61         ret = -ENODEV;
  62         rtnl_lock();
  63         if (sdata->dev->reg_state == NETREG_REGISTERED)
  64                 ret = (*write)(sdata, buf, count);
  65         rtnl_unlock();
  66
  67 freebuf:
  68         kfree(buf);
  69         return ret;
  70 }
  71
  72 #define IEEE80211_IF_FMT(name, field, format_string)                    \
  73 static ssize_t ieee80211_if_fmt_##name(                                 \
  74         const struct ieee80211_sub_if_data *sdata, char *buf,           \
  75         int buflen)                                                     \
  76 {                                                                       \
  77         return scnprintf(buf, buflen, format_string, sdata->field);     \
  78 }
  79 #define IEEE80211_IF_FMT_DEC(name, field)                               \
  80                 IEEE80211_IF_FMT(name, field, "%d\n")
  81 #define IEEE80211_IF_FMT_HEX(name, field)                               \
  82                 IEEE80211_IF_FMT(name, field, "%#x\n")
  83 #define IEEE80211_IF_FMT_SIZE(name, field)                              \
  84                 IEEE80211_IF_FMT(name, field, "%zd\n")
  85
  86 #define IEEE80211_IF_FMT_ATOMIC(name, field)                            \
  87 static ssize_t ieee80211_if_fmt_##name(                                 \
  88         const struct ieee80211_sub_if_data *sdata,                      \
  89         char *buf, int buflen)                                          \
  90 {                                                                       \
  91         return scnprintf(buf, buflen, "%d\n", atomic_read(&sdata->field));\
  92 }
  93
  94 #define IEEE80211_IF_FMT_MAC(name, field)                               \
  95 static ssize_t ieee80211_if_fmt_##name(                                 \
  96         const struct ieee80211_sub_if_data *sdata, char *buf,           \
  97         int buflen)                                                     \
  98 {                                                                       \
  99         return scnprintf(buf, buflen, "%pM\n", sdata->field);           \
 100 }
 101
 102 #define IEEE80211_IF_FMT_DEC_DIV_16(name, field)                        \
 103 static ssize_t ieee80211_if_fmt_##name(                                 \
 104         const struct ieee80211_sub_if_data *sdata,                      \
 105         char *buf, int buflen)                                          \
 106 {                                                                       \
 107         return scnprintf(buf, buflen, "%d\n", sdata->field / 16);       \
 108 }
 109
 110 #define __IEEE80211_IF_FILE(name, _write)                               \
 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         .write = (_write),                                              \
 122         .open = mac80211_open_file_generic,                             \
 123 }
 124
 125 #define __IEEE80211_IF_FILE_W(name)                                     \
 126 static ssize_t ieee80211_if_write_##name(struct file *file,             \
 127                                          const char __user *userbuf,    \
 128                                          size_t count, loff_t *ppos)    \
 129 {                                                                       \
 130         return ieee80211_if_write(file->private_data, userbuf, count,   \
 131                                   ppos, ieee80211_if_parse_##name);     \
 132 }                                                                       \
 133 __IEEE80211_IF_FILE(name, ieee80211_if_write_##name)
 134
 135
 136 #define IEEE80211_IF_FILE(name, field, format)                          \
 137                 IEEE80211_IF_FMT_##format(name, field)                  \
 138                 __IEEE80211_IF_FILE(name, NULL)
 139
 140 /* common attributes */
 141 IEEE80211_IF_FILE(drop_unencrypted, drop_unencrypted, DEC);
 142 IEEE80211_IF_FILE(rc_rateidx_mask_2ghz, rc_rateidx_mask[IEEE80211_BAND_2GHZ],
 143                   HEX);
 144 IEEE80211_IF_FILE(rc_rateidx_mask_5ghz, rc_rateidx_mask[IEEE80211_BAND_5GHZ],
 145                   HEX);
 146
 147 /* STA attributes */
 148 IEEE80211_IF_FILE(bssid, u.mgd.bssid, MAC);
 149 IEEE80211_IF_FILE(aid, u.mgd.aid, DEC);
 150 IEEE80211_IF_FILE(last_beacon, u.mgd.last_beacon_signal, DEC);
 151 IEEE80211_IF_FILE(ave_beacon, u.mgd.ave_beacon_signal, DEC_DIV_16);
 152
 153 static int ieee80211_set_smps(struct ieee80211_sub_if_data *sdata,
 154                               enum ieee80211_smps_mode smps_mode)
 155 {
 156         struct ieee80211_local *local = sdata->local;
 157         int err;
 158
 159         if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_STATIC_SMPS) &&
 160             smps_mode == IEEE80211_SMPS_STATIC)
 161                 return -EINVAL;
 162
 163         /* auto should be dynamic if in PS mode */
 164         if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS) &&
 165             (smps_mode == IEEE80211_SMPS_DYNAMIC ||
 166              smps_mode == IEEE80211_SMPS_AUTOMATIC))
 167                 return -EINVAL;
 168
 169         /* supported only on managed interfaces for now */
 170         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 171                 return -EOPNOTSUPP;
 172
 173         mutex_lock(&local->iflist_mtx);
 174         err = __ieee80211_request_smps(sdata, smps_mode);
 175         mutex_unlock(&local->iflist_mtx);
 176
 177         return err;
 178 }
 179
 180 static const char *smps_modes[IEEE80211_SMPS_NUM_MODES] = {
 181         [IEEE80211_SMPS_AUTOMATIC] = "auto",
 182         [IEEE80211_SMPS_OFF] = "off",
 183         [IEEE80211_SMPS_STATIC] = "static",
 184         [IEEE80211_SMPS_DYNAMIC] = "dynamic",
 185 };
 186
 187 static ssize_t ieee80211_if_fmt_smps(const struct ieee80211_sub_if_data *sdata,
 188                                      char *buf, int buflen)
 189 {
 190         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 191                 return -EOPNOTSUPP;
 192
 193         return snprintf(buf, buflen, "request: %s\nused: %s\n",
 194                         smps_modes[sdata->u.mgd.req_smps],
 195                         smps_modes[sdata->u.mgd.ap_smps]);
 196 }
 197
 198 static ssize_t ieee80211_if_parse_smps(struct ieee80211_sub_if_data *sdata,
 199                                        const char *buf, int buflen)
 200 {
 201         enum ieee80211_smps_mode mode;
 202
 203         for (mode = 0; mode < IEEE80211_SMPS_NUM_MODES; mode++) {
 204                 if (strncmp(buf, smps_modes[mode], buflen) == 0) {
 205                         int err = ieee80211_set_smps(sdata, mode);
 206                         if (!err)
 207                                 return buflen;
 208                         return err;
 209                 }
 210         }
 211
 212         return -EINVAL;
 213 }
 214
 215 __IEEE80211_IF_FILE_W(smps);
 216
 217 /* AP attributes */
 218 IEEE80211_IF_FILE(num_sta_ps, u.ap.num_sta_ps, ATOMIC);
 219 IEEE80211_IF_FILE(dtim_count, u.ap.dtim_count, DEC);
 220
 221 static ssize_t ieee80211_if_fmt_num_buffered_multicast(
 222         const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
 223 {
 224         return scnprintf(buf, buflen, "%u\n",
 225                          skb_queue_len(&sdata->u.ap.ps_bc_buf));
 226 }
 227 __IEEE80211_IF_FILE(num_buffered_multicast, NULL);
 228
 229 /* WDS attributes */
 230 IEEE80211_IF_FILE(peer, u.wds.remote_addr, MAC);
 231
 232 #ifdef CONFIG_MAC80211_MESH
 233 /* Mesh stats attributes */
 234 IEEE80211_IF_FILE(fwded_mcast, u.mesh.mshstats.fwded_mcast, DEC);
 235 IEEE80211_IF_FILE(fwded_unicast, u.mesh.mshstats.fwded_unicast, DEC);
 236 IEEE80211_IF_FILE(fwded_frames, u.mesh.mshstats.fwded_frames, DEC);
 237 IEEE80211_IF_FILE(dropped_frames_ttl, u.mesh.mshstats.dropped_frames_ttl, DEC);
 238 IEEE80211_IF_FILE(dropped_frames_no_route,
 239                 u.mesh.mshstats.dropped_frames_no_route, DEC);
 240 IEEE80211_IF_FILE(estab_plinks, u.mesh.mshstats.estab_plinks, ATOMIC);
 241
 242 /* Mesh parameters */
 243 IEEE80211_IF_FILE(dot11MeshMaxRetries,
 244                 u.mesh.mshcfg.dot11MeshMaxRetries, DEC);
 245 IEEE80211_IF_FILE(dot11MeshRetryTimeout,
 246                 u.mesh.mshcfg.dot11MeshRetryTimeout, DEC);
 247 IEEE80211_IF_FILE(dot11MeshConfirmTimeout,
 248                 u.mesh.mshcfg.dot11MeshConfirmTimeout, DEC);
 249 IEEE80211_IF_FILE(dot11MeshHoldingTimeout,
 250                 u.mesh.mshcfg.dot11MeshHoldingTimeout, DEC);
 251 IEEE80211_IF_FILE(dot11MeshTTL, u.mesh.mshcfg.dot11MeshTTL, DEC);
 252 IEEE80211_IF_FILE(auto_open_plinks, u.mesh.mshcfg.auto_open_plinks, DEC);
 253 IEEE80211_IF_FILE(dot11MeshMaxPeerLinks,
 254                 u.mesh.mshcfg.dot11MeshMaxPeerLinks, DEC);
 255 IEEE80211_IF_FILE(dot11MeshHWMPactivePathTimeout,
 256                 u.mesh.mshcfg.dot11MeshHWMPactivePathTimeout, DEC);
 257 IEEE80211_IF_FILE(dot11MeshHWMPpreqMinInterval,
 258                 u.mesh.mshcfg.dot11MeshHWMPpreqMinInterval, DEC);
 259 IEEE80211_IF_FILE(dot11MeshHWMPnetDiameterTraversalTime,
 260                 u.mesh.mshcfg.dot11MeshHWMPnetDiameterTraversalTime, DEC);
 261 IEEE80211_IF_FILE(dot11MeshHWMPmaxPREQretries,
 262                 u.mesh.mshcfg.dot11MeshHWMPmaxPREQretries, DEC);
 263 IEEE80211_IF_FILE(path_refresh_time,
 264                 u.mesh.mshcfg.path_refresh_time, DEC);
 265 IEEE80211_IF_FILE(min_discovery_timeout,
 266                 u.mesh.mshcfg.min_discovery_timeout, DEC);
 267 IEEE80211_IF_FILE(dot11MeshHWMPRootMode,
 268                 u.mesh.mshcfg.dot11MeshHWMPRootMode, DEC);
 269 #endif
 270
 271
 272 #define DEBUGFS_ADD(name) \
 273         debugfs_create_file(#name, 0400, sdata->debugfs.dir, \
 274                             sdata, &name##_ops);
 275
 276 #define DEBUGFS_ADD_MODE(name, mode) \
 277         debugfs_create_file(#name, mode, sdata->debugfs.dir, \
 278                             sdata, &name##_ops);
 279
 280 static void add_sta_files(struct ieee80211_sub_if_data *sdata)
 281 {
 282         DEBUGFS_ADD(drop_unencrypted);
 283         DEBUGFS_ADD(rc_rateidx_mask_2ghz);
 284         DEBUGFS_ADD(rc_rateidx_mask_5ghz);
 285
 286         DEBUGFS_ADD(bssid);
 287         DEBUGFS_ADD(aid);
 288         DEBUGFS_ADD(last_beacon);
 289         DEBUGFS_ADD(ave_beacon);
 290         DEBUGFS_ADD_MODE(smps, 0600);
 291 }
 292
 293 static void add_ap_files(struct ieee80211_sub_if_data *sdata)
 294 {
 295         DEBUGFS_ADD(drop_unencrypted);
 296         DEBUGFS_ADD(rc_rateidx_mask_2ghz);
 297         DEBUGFS_ADD(rc_rateidx_mask_5ghz);
 298
 299         DEBUGFS_ADD(num_sta_ps);
 300         DEBUGFS_ADD(dtim_count);
 301         DEBUGFS_ADD(num_buffered_multicast);
 302 }
 303
 304 static void add_wds_files(struct ieee80211_sub_if_data *sdata)
 305 {
 306         DEBUGFS_ADD(drop_unencrypted);
 307         DEBUGFS_ADD(rc_rateidx_mask_2ghz);
 308         DEBUGFS_ADD(rc_rateidx_mask_5ghz);
 309
 310         DEBUGFS_ADD(peer);
 311 }
 312
 313 static void add_vlan_files(struct ieee80211_sub_if_data *sdata)
 314 {
 315         DEBUGFS_ADD(drop_unencrypted);
 316         DEBUGFS_ADD(rc_rateidx_mask_2ghz);
 317         DEBUGFS_ADD(rc_rateidx_mask_5ghz);
 318 }
 319
 320 static void add_monitor_files(struct ieee80211_sub_if_data *sdata)
 321 {
 322 }
 323
 324 #ifdef CONFIG_MAC80211_MESH
 325
 326 static void add_mesh_stats(struct ieee80211_sub_if_data *sdata)
 327 {
 328         struct dentry *dir = debugfs_create_dir("mesh_stats",
 329                                                 sdata->debugfs.dir);
 330
 331 #define MESHSTATS_ADD(name)\
 332         debugfs_create_file(#name, 0400, dir, sdata, &name##_ops);
 333
 334         MESHSTATS_ADD(fwded_mcast);
 335         MESHSTATS_ADD(fwded_unicast);
 336         MESHSTATS_ADD(fwded_frames);
 337         MESHSTATS_ADD(dropped_frames_ttl);
 338         MESHSTATS_ADD(dropped_frames_no_route);
 339         MESHSTATS_ADD(estab_plinks);
 340 #undef MESHSTATS_ADD
 341 }
 342
 343 static void add_mesh_config(struct ieee80211_sub_if_data *sdata)
 344 {
 345         struct dentry *dir = debugfs_create_dir("mesh_config",
 346                                                 sdata->debugfs.dir);
 347
 348 #define MESHPARAMS_ADD(name) \
 349         debugfs_create_file(#name, 0600, dir, sdata, &name##_ops);
 350
 351         MESHPARAMS_ADD(dot11MeshMaxRetries);
 352         MESHPARAMS_ADD(dot11MeshRetryTimeout);
 353         MESHPARAMS_ADD(dot11MeshConfirmTimeout);
 354         MESHPARAMS_ADD(dot11MeshHoldingTimeout);
 355         MESHPARAMS_ADD(dot11MeshTTL);
 356         MESHPARAMS_ADD(auto_open_plinks);
 357         MESHPARAMS_ADD(dot11MeshMaxPeerLinks);
 358         MESHPARAMS_ADD(dot11MeshHWMPactivePathTimeout);
 359         MESHPARAMS_ADD(dot11MeshHWMPpreqMinInterval);
 360         MESHPARAMS_ADD(dot11MeshHWMPnetDiameterTraversalTime);
 361         MESHPARAMS_ADD(dot11MeshHWMPmaxPREQretries);
 362         MESHPARAMS_ADD(path_refresh_time);
 363         MESHPARAMS_ADD(min_discovery_timeout);
 364
 365 #undef MESHPARAMS_ADD
 366 }
 367 #endif
 368
 369 static void add_files(struct ieee80211_sub_if_data *sdata)
 370 {
 371         if (!sdata->debugfs.dir)
 372                 return;
 373
 374         switch (sdata->vif.type) {
 375         case NL80211_IFTYPE_MESH_POINT:
 376 #ifdef CONFIG_MAC80211_MESH
 377                 add_mesh_stats(sdata);
 378                 add_mesh_config(sdata);
 379 #endif
 380                 break;
 381         case NL80211_IFTYPE_STATION:
 382                 add_sta_files(sdata);
 383                 break;
 384         case NL80211_IFTYPE_ADHOC:
 385                 /* XXX */
 386                 break;
 387         case NL80211_IFTYPE_AP:
 388                 add_ap_files(sdata);
 389                 break;
 390         case NL80211_IFTYPE_WDS:
 391                 add_wds_files(sdata);
 392                 break;
 393         case NL80211_IFTYPE_MONITOR:
 394                 add_monitor_files(sdata);
 395                 break;
 396         case NL80211_IFTYPE_AP_VLAN:
 397                 add_vlan_files(sdata);
 398                 break;
 399         default:
 400                 break;
 401         }
 402 }
 403
 404 void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata)
 405 {
 406         char buf[10+IFNAMSIZ];
 407
 408         sprintf(buf, "netdev:%s", sdata->name);
 409         sdata->debugfs.dir = debugfs_create_dir(buf,
 410                 sdata->local->hw.wiphy->debugfsdir);
 411         add_files(sdata);
 412 }
 413
 414 void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata)
 415 {
 416         if (!sdata->debugfs.dir)
 417                 return;
 418
 419         debugfs_remove_recursive(sdata->debugfs.dir);
 420         sdata->debugfs.dir = NULL;
 421 }
 422
 423 void ieee80211_debugfs_rename_netdev(struct ieee80211_sub_if_data *sdata)
 424 {
 425         struct dentry *dir;
 426         char buf[10 + IFNAMSIZ];
 427
 428         dir = sdata->debugfs.dir;
 429
 430         if (!dir)
 431                 return;
 432
 433         sprintf(buf, "netdev:%s", sdata->name);
 434         if (!debugfs_rename(dir->d_parent, dir, dir->d_parent, buf))
 435                 printk(KERN_ERR "mac80211: debugfs: failed to rename debugfs "
 436                        "dir to %s\n", buf);
 437 }