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/slab.h>
  17 #include <linux/notifier.h>
  18 #include <net/mac80211.h>
  19 #include <net/cfg80211.h>
  20 #include "ieee80211_i.h"
  21 #include "rate.h"
  22 #include "debugfs.h"
  23 #include "debugfs_netdev.h"
  24
  25 static ssize_t ieee80211_if_read(
  26         struct ieee80211_sub_if_data *sdata,
  27         char __user *userbuf,
  28         size_t count, loff_t *ppos,
  29         ssize_t (*format)(const struct ieee80211_sub_if_data *, char *, int))
  30 {
  31         char buf[70];
  32         ssize_t ret = -EINVAL;
  33
  34         read_lock(&dev_base_lock);
  35         if (sdata->dev->reg_state == NETREG_REGISTERED)
  36                 ret = (*format)(sdata, buf, sizeof(buf));
  37         read_unlock(&dev_base_lock);
  38
  39         if (ret != -EINVAL)
  40                 ret = simple_read_from_buffer(userbuf, count, ppos, buf, ret);
  41
  42         return ret;
  43 }
  44
  45 static ssize_t ieee80211_if_write(
  46         struct ieee80211_sub_if_data *sdata,
  47         const char __user *userbuf,
  48         size_t count, loff_t *ppos,
  49         ssize_t (*write)(struct ieee80211_sub_if_data *, const char *, int))
  50 {
  51         u8 *buf;
  52         ssize_t ret;
  53
  54         buf = kmalloc(count, GFP_KERNEL);
  55         if (!buf)
  56                 return -ENOMEM;
  57
  58         ret = -EFAULT;
  59         if (copy_from_user(buf, userbuf, count))
  60                 goto freebuf;
  61
  62         ret = -ENODEV;
  63         rtnl_lock();
  64         if (sdata->dev->reg_state == NETREG_REGISTERED)
  65                 ret = (*write)(sdata, buf, count);
  66         rtnl_unlock();
  67
  68 freebuf:
  69         kfree(buf);
  70         return ret;
  71 }
  72
  73 #define IEEE80211_IF_FMT(name, field, format_string)                    \
  74 static ssize_t ieee80211_if_fmt_##name(                                 \
  75         const struct ieee80211_sub_if_data *sdata, char *buf,           \
  76         int buflen)                                                     \
  77 {                                                                       \
  78         return scnprintf(buf, buflen, format_string, sdata->field);     \
  79 }
  80 #define IEEE80211_IF_FMT_DEC(name, field)                               \
  81                 IEEE80211_IF_FMT(name, field, "%d\n")
  82 #define IEEE80211_IF_FMT_HEX(name, field)                               \
  83                 IEEE80211_IF_FMT(name, field, "%#x\n")
  84 #define IEEE80211_IF_FMT_SIZE(name, field)                              \
  85                 IEEE80211_IF_FMT(name, field, "%zd\n")
  86
  87 #define IEEE80211_IF_FMT_ATOMIC(name, field)                            \
  88 static ssize_t ieee80211_if_fmt_##name(                                 \
  89         const struct ieee80211_sub_if_data *sdata,                      \
  90         char *buf, int buflen)                                          \
  91 {                                                                       \
  92         return scnprintf(buf, buflen, "%d\n", atomic_read(&sdata->field));\
  93 }
  94
  95 #define IEEE80211_IF_FMT_MAC(name, field)                               \
  96 static ssize_t ieee80211_if_fmt_##name(                                 \
  97         const struct ieee80211_sub_if_data *sdata, char *buf,           \
  98         int buflen)                                                     \
  99 {                                                                       \
 100         return scnprintf(buf, buflen, "%pM\n", sdata->field);           \
 101 }
 102
 103 #define IEEE80211_IF_FMT_DEC_DIV_16(name, field)                        \
 104 static ssize_t ieee80211_if_fmt_##name(                                 \
 105         const struct ieee80211_sub_if_data *sdata,                      \
 106         char *buf, int buflen)                                          \
 107 {                                                                       \
 108         return scnprintf(buf, buflen, "%d\n", sdata->field / 16);       \
 109 }
 110
 111 #define __IEEE80211_IF_FILE(name, _write)                               \
 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         .write = (_write),                                              \
 123         .open = mac80211_open_file_generic,                             \
 124         .llseek = generic_file_llseek,                                  \
 125 }
 126
 127 #define __IEEE80211_IF_FILE_W(name)                                     \
 128 static ssize_t ieee80211_if_write_##name(struct file *file,             \
 129                                          const char __user *userbuf,    \
 130                                          size_t count, loff_t *ppos)    \
 131 {                                                                       \
 132         return ieee80211_if_write(file->private_data, userbuf, count,   \
 133                                   ppos, ieee80211_if_parse_##name);     \
 134 }                                                                       \
 135 __IEEE80211_IF_FILE(name, ieee80211_if_write_##name)
 136
 137
 138 #define IEEE80211_IF_FILE(name, field, format)                          \
 139                 IEEE80211_IF_FMT_##format(name, field)                  \
 140                 __IEEE80211_IF_FILE(name, NULL)
 141
 142 /* common attributes */
 143 IEEE80211_IF_FILE(drop_unencrypted, drop_unencrypted, DEC);
 144 IEEE80211_IF_FILE(rc_rateidx_mask_2ghz, rc_rateidx_mask[IEEE80211_BAND_2GHZ],
 145                   HEX);
 146 IEEE80211_IF_FILE(rc_rateidx_mask_5ghz, rc_rateidx_mask[IEEE80211_BAND_5GHZ],
 147                   HEX);
 148
 149 /* STA attributes */
 150 IEEE80211_IF_FILE(bssid, u.mgd.bssid, MAC);
 151 IEEE80211_IF_FILE(aid, u.mgd.aid, DEC);
 152 IEEE80211_IF_FILE(last_beacon, u.mgd.last_beacon_signal, DEC);
 153 IEEE80211_IF_FILE(ave_beacon, u.mgd.ave_beacon_signal, DEC_DIV_16);
 154
 155 static int ieee80211_set_smps(struct ieee80211_sub_if_data *sdata,
 156                               enum ieee80211_smps_mode smps_mode)
 157 {
 158         struct ieee80211_local *local = sdata->local;
 159         int err;
 160
 161         if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_STATIC_SMPS) &&
 162             smps_mode == IEEE80211_SMPS_STATIC)
 163                 return -EINVAL;
 164
 165         /* auto should be dynamic if in PS mode */
 166         if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS) &&
 167             (smps_mode == IEEE80211_SMPS_DYNAMIC ||
 168              smps_mode == IEEE80211_SMPS_AUTOMATIC))
 169                 return -EINVAL;
 170
 171         /* supported only on managed interfaces for now */
 172         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 173                 return -EOPNOTSUPP;
 174
 175         mutex_lock(&local->iflist_mtx);
 176         err = __ieee80211_request_smps(sdata, smps_mode);
 177         mutex_unlock(&local->iflist_mtx);
 178
 179         return err;
 180 }
 181
 182 static const char *smps_modes[IEEE80211_SMPS_NUM_MODES] = {
 183         [IEEE80211_SMPS_AUTOMATIC] = "auto",
 184         [IEEE80211_SMPS_OFF] = "off",
 185         [IEEE80211_SMPS_STATIC] = "static",
 186         [IEEE80211_SMPS_DYNAMIC] = "dynamic",
 187 };
 188
 189 static ssize_t ieee80211_if_fmt_smps(const struct ieee80211_sub_if_data *sdata,
 190                                      char *buf, int buflen)
 191 {
 192         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 193                 return -EOPNOTSUPP;
 194
 195         return snprintf(buf, buflen, "request: %s\nused: %s\n",
 196                         smps_modes[sdata->u.mgd.req_smps],
 197                         smps_modes[sdata->u.mgd.ap_smps]);
 198 }
 199
 200 static ssize_t ieee80211_if_parse_smps(struct ieee80211_sub_if_data *sdata,
 201                                        const char *buf, int buflen)
 202 {
 203         enum ieee80211_smps_mode mode;
 204
 205         for (mode = 0; mode < IEEE80211_SMPS_NUM_MODES; mode++) {
 206                 if (strncmp(buf, smps_modes[mode], buflen) == 0) {
 207                         int err = ieee80211_set_smps(sdata, mode);
 208                         if (!err)
 209                                 return buflen;
 210                         return err;
 211                 }
 212         }
 213
 214         return -EINVAL;
 215 }
 216
 217 __IEEE80211_IF_FILE_W(smps);
 218
 219 /* AP attributes */
 220 IEEE80211_IF_FILE(num_sta_ps, u.ap.num_sta_ps, ATOMIC);
 221 IEEE80211_IF_FILE(dtim_count, u.ap.dtim_count, DEC);
 222
 223 static ssize_t ieee80211_if_fmt_num_buffered_multicast(
 224         const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
 225 {
 226         return scnprintf(buf, buflen, "%u\n",
 227                          skb_queue_len(&sdata->u.ap.ps_bc_buf));
 228 }
 229 __IEEE80211_IF_FILE(num_buffered_multicast, NULL);
 230
 231 /* WDS attributes */
 232 IEEE80211_IF_FILE(peer, u.wds.remote_addr, MAC);
 233
 234 #ifdef CONFIG_MAC80211_MESH
 235 /* Mesh stats attributes */
 236 IEEE80211_IF_FILE(fwded_mcast, u.mesh.mshstats.fwded_mcast, DEC);
 237 IEEE80211_IF_FILE(fwded_unicast, u.mesh.mshstats.fwded_unicast, DEC);
 238 IEEE80211_IF_FILE(fwded_frames, u.mesh.mshstats.fwded_frames, DEC);
 239 IEEE80211_IF_FILE(dropped_frames_ttl, u.mesh.mshstats.dropped_frames_ttl, DEC);
 240 IEEE80211_IF_FILE(dropped_frames_no_route,
 241                 u.mesh.mshstats.dropped_frames_no_route, DEC);
 242 IEEE80211_IF_FILE(estab_plinks, u.mesh.mshstats.estab_plinks, ATOMIC);
 243
 244 /* Mesh parameters */
 245 IEEE80211_IF_FILE(dot11MeshMaxRetries,
 246                 u.mesh.mshcfg.dot11MeshMaxRetries, DEC);
 247 IEEE80211_IF_FILE(dot11MeshRetryTimeout,
 248                 u.mesh.mshcfg.dot11MeshRetryTimeout, DEC);
 249 IEEE80211_IF_FILE(dot11MeshConfirmTimeout,
 250                 u.mesh.mshcfg.dot11MeshConfirmTimeout, DEC);
 251 IEEE80211_IF_FILE(dot11MeshHoldingTimeout,
 252                 u.mesh.mshcfg.dot11MeshHoldingTimeout, DEC);
 253 IEEE80211_IF_FILE(dot11MeshTTL, u.mesh.mshcfg.dot11MeshTTL, DEC);
 254 IEEE80211_IF_FILE(element_ttl, u.mesh.mshcfg.element_ttl, DEC);
 255 IEEE80211_IF_FILE(auto_open_plinks, u.mesh.mshcfg.auto_open_plinks, DEC);
 256 IEEE80211_IF_FILE(dot11MeshMaxPeerLinks,
 257                 u.mesh.mshcfg.dot11MeshMaxPeerLinks, DEC);
 258 IEEE80211_IF_FILE(dot11MeshHWMPactivePathTimeout,
 259                 u.mesh.mshcfg.dot11MeshHWMPactivePathTimeout, DEC);
 260 IEEE80211_IF_FILE(dot11MeshHWMPpreqMinInterval,
 261                 u.mesh.mshcfg.dot11MeshHWMPpreqMinInterval, DEC);
 262 IEEE80211_IF_FILE(dot11MeshHWMPnetDiameterTraversalTime,
 263                 u.mesh.mshcfg.dot11MeshHWMPnetDiameterTraversalTime, DEC);
 264 IEEE80211_IF_FILE(dot11MeshHWMPmaxPREQretries,
 265                 u.mesh.mshcfg.dot11MeshHWMPmaxPREQretries, DEC);
 266 IEEE80211_IF_FILE(path_refresh_time,
 267                 u.mesh.mshcfg.path_refresh_time, DEC);
 268 IEEE80211_IF_FILE(min_discovery_timeout,
 269                 u.mesh.mshcfg.min_discovery_timeout, DEC);
 270 IEEE80211_IF_FILE(dot11MeshHWMPRootMode,
 271                 u.mesh.mshcfg.dot11MeshHWMPRootMode, DEC);
 272 #endif
 273
 274
 275 #define DEBUGFS_ADD(name) \
 276         debugfs_create_file(#name, 0400, sdata->debugfs.dir, \
 277                             sdata, &name##_ops);
 278
 279 #define DEBUGFS_ADD_MODE(name, mode) \
 280         debugfs_create_file(#name, mode, sdata->debugfs.dir, \
 281                             sdata, &name##_ops);
 282
 283 static void add_sta_files(struct ieee80211_sub_if_data *sdata)
 284 {
 285         DEBUGFS_ADD(drop_unencrypted);
 286         DEBUGFS_ADD(rc_rateidx_mask_2ghz);
 287         DEBUGFS_ADD(rc_rateidx_mask_5ghz);
 288
 289         DEBUGFS_ADD(bssid);
 290         DEBUGFS_ADD(aid);
 291         DEBUGFS_ADD(last_beacon);
 292         DEBUGFS_ADD(ave_beacon);
 293         DEBUGFS_ADD_MODE(smps, 0600);
 294 }
 295
 296 static void add_ap_files(struct ieee80211_sub_if_data *sdata)
 297 {
 298         DEBUGFS_ADD(drop_unencrypted);
 299         DEBUGFS_ADD(rc_rateidx_mask_2ghz);
 300         DEBUGFS_ADD(rc_rateidx_mask_5ghz);
 301
 302         DEBUGFS_ADD(num_sta_ps);
 303         DEBUGFS_ADD(dtim_count);
 304         DEBUGFS_ADD(num_buffered_multicast);
 305 }
 306
 307 static void add_wds_files(struct ieee80211_sub_if_data *sdata)
 308 {
 309         DEBUGFS_ADD(drop_unencrypted);
 310         DEBUGFS_ADD(rc_rateidx_mask_2ghz);
 311         DEBUGFS_ADD(rc_rateidx_mask_5ghz);
 312
 313         DEBUGFS_ADD(peer);
 314 }
 315
 316 static void add_vlan_files(struct ieee80211_sub_if_data *sdata)
 317 {
 318         DEBUGFS_ADD(drop_unencrypted);
 319         DEBUGFS_ADD(rc_rateidx_mask_2ghz);
 320         DEBUGFS_ADD(rc_rateidx_mask_5ghz);
 321 }
 322
 323 static void add_monitor_files(struct ieee80211_sub_if_data *sdata)
 324 {
 325 }
 326
 327 #ifdef CONFIG_MAC80211_MESH
 328
 329 static void add_mesh_stats(struct ieee80211_sub_if_data *sdata)
 330 {
 331         struct dentry *dir = debugfs_create_dir("mesh_stats",
 332                                                 sdata->debugfs.dir);
 333
 334 #define MESHSTATS_ADD(name)\
 335         debugfs_create_file(#name, 0400, dir, sdata, &name##_ops);
 336
 337         MESHSTATS_ADD(fwded_mcast);
 338         MESHSTATS_ADD(fwded_unicast);
 339         MESHSTATS_ADD(fwded_frames);
 340         MESHSTATS_ADD(dropped_frames_ttl);
 341         MESHSTATS_ADD(dropped_frames_no_route);
 342         MESHSTATS_ADD(estab_plinks);
 343 #undef MESHSTATS_ADD
 344 }
 345
 346 static void add_mesh_config(struct ieee80211_sub_if_data *sdata)
 347 {
 348         struct dentry *dir = debugfs_create_dir("mesh_config",
 349                                                 sdata->debugfs.dir);
 350
 351 #define MESHPARAMS_ADD(name) \
 352         debugfs_create_file(#name, 0600, dir, sdata, &name##_ops);
 353
 354         MESHPARAMS_ADD(dot11MeshMaxRetries);
 355         MESHPARAMS_ADD(dot11MeshRetryTimeout);
 356         MESHPARAMS_ADD(dot11MeshConfirmTimeout);
 357         MESHPARAMS_ADD(dot11MeshHoldingTimeout);
 358         MESHPARAMS_ADD(dot11MeshTTL);
 359         MESHPARAMS_ADD(element_ttl);
 360         MESHPARAMS_ADD(auto_open_plinks);
 361         MESHPARAMS_ADD(dot11MeshMaxPeerLinks);
 362         MESHPARAMS_ADD(dot11MeshHWMPactivePathTimeout);
 363         MESHPARAMS_ADD(dot11MeshHWMPpreqMinInterval);
 364         MESHPARAMS_ADD(dot11MeshHWMPnetDiameterTraversalTime);
 365         MESHPARAMS_ADD(dot11MeshHWMPmaxPREQretries);
 366         MESHPARAMS_ADD(path_refresh_time);
 367         MESHPARAMS_ADD(min_discovery_timeout);
 368
 369 #undef MESHPARAMS_ADD
 370 }
 371 #endif
 372
 373 static void add_files(struct ieee80211_sub_if_data *sdata)
 374 {
 375         if (!sdata->debugfs.dir)
 376                 return;
 377
 378         switch (sdata->vif.type) {
 379         case NL80211_IFTYPE_MESH_POINT:
 380 #ifdef CONFIG_MAC80211_MESH
 381                 add_mesh_stats(sdata);
 382                 add_mesh_config(sdata);
 383 #endif
 384                 break;
 385         case NL80211_IFTYPE_STATION:
 386                 add_sta_files(sdata);
 387                 break;
 388         case NL80211_IFTYPE_ADHOC:
 389                 /* XXX */
 390                 break;
 391         case NL80211_IFTYPE_AP:
 392                 add_ap_files(sdata);
 393                 break;
 394         case NL80211_IFTYPE_WDS:
 395                 add_wds_files(sdata);
 396                 break;
 397         case NL80211_IFTYPE_MONITOR:
 398                 add_monitor_files(sdata);
 399                 break;
 400         case NL80211_IFTYPE_AP_VLAN:
 401                 add_vlan_files(sdata);
 402                 break;
 403         default:
 404                 break;
 405         }
 406 }
 407
 408 void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata)
 409 {
 410         char buf[10+IFNAMSIZ];
 411
 412         sprintf(buf, "netdev:%s", sdata->name);
 413         sdata->debugfs.dir = debugfs_create_dir(buf,
 414                 sdata->local->hw.wiphy->debugfsdir);
 415         if (sdata->debugfs.dir)
 416                 sdata->debugfs.subdir_stations = debugfs_create_dir("stations",
 417                         sdata->debugfs.dir);
 418         add_files(sdata);
 419 }
 420
 421 void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata)
 422 {
 423         if (!sdata->debugfs.dir)
 424                 return;
 425
 426         debugfs_remove_recursive(sdata->debugfs.dir);
 427         sdata->debugfs.dir = NULL;
 428 }
 429
 430 void ieee80211_debugfs_rename_netdev(struct ieee80211_sub_if_data *sdata)
 431 {
 432         struct dentry *dir;
 433         char buf[10 + IFNAMSIZ];
 434
 435         dir = sdata->debugfs.dir;
 436
 437         if (!dir)
 438                 return;
 439
 440         sprintf(buf, "netdev:%s", sdata->name);
 441         if (!debugfs_rename(dir->d_parent, dir, dir->d_parent, buf))
 442                 printk(KERN_ERR "mac80211: debugfs: failed to rename debugfs "
 443                        "dir to %s\n", buf);
 444 }