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 }
 125
 126 #define __IEEE80211_IF_FILE_W(name)                                     \
 127 static ssize_t ieee80211_if_write_##name(struct file *file,             \
 128                                          const char __user *userbuf,    \
 129                                          size_t count, loff_t *ppos)    \
 130 {                                                                       \
 131         return ieee80211_if_write(file->private_data, userbuf, count,   \
 132                                   ppos, ieee80211_if_parse_##name);     \
 133 }                                                                       \
 134 __IEEE80211_IF_FILE(name, ieee80211_if_write_##name)
 135
 136
 137 #define IEEE80211_IF_FILE(name, field, format)                          \
 138                 IEEE80211_IF_FMT_##format(name, field)                  \
 139                 __IEEE80211_IF_FILE(name, NULL)
 140
 141 /* common attributes */
 142 IEEE80211_IF_FILE(drop_unencrypted, drop_unencrypted, DEC);
 143 IEEE80211_IF_FILE(rc_rateidx_mask_2ghz, rc_rateidx_mask[IEEE80211_BAND_2GHZ],
 144                   HEX);
 145 IEEE80211_IF_FILE(rc_rateidx_mask_5ghz, rc_rateidx_mask[IEEE80211_BAND_5GHZ],
 146                   HEX);
 147
 148 /* STA attributes */
 149 IEEE80211_IF_FILE(bssid, u.mgd.bssid, MAC);
 150 IEEE80211_IF_FILE(aid, u.mgd.aid, DEC);
 151 IEEE80211_IF_FILE(last_beacon, u.mgd.last_beacon_signal, DEC);
 152 IEEE80211_IF_FILE(ave_beacon, u.mgd.ave_beacon_signal, DEC_DIV_16);
 153
 154 static int ieee80211_set_smps(struct ieee80211_sub_if_data *sdata,
 155                               enum ieee80211_smps_mode smps_mode)
 156 {
 157         struct ieee80211_local *local = sdata->local;
 158         int err;
 159
 160         if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_STATIC_SMPS) &&
 161             smps_mode == IEEE80211_SMPS_STATIC)
 162                 return -EINVAL;
 163
 164         /* auto should be dynamic if in PS mode */
 165         if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS) &&
 166             (smps_mode == IEEE80211_SMPS_DYNAMIC ||
 167              smps_mode == IEEE80211_SMPS_AUTOMATIC))
 168                 return -EINVAL;
 169
 170         /* supported only on managed interfaces for now */
 171         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 172                 return -EOPNOTSUPP;
 173
 174         mutex_lock(&local->iflist_mtx);
 175         err = __ieee80211_request_smps(sdata, smps_mode);
 176         mutex_unlock(&local->iflist_mtx);
 177
 178         return err;
 179 }
 180
 181 static const char *smps_modes[IEEE80211_SMPS_NUM_MODES] = {
 182         [IEEE80211_SMPS_AUTOMATIC] = "auto",
 183         [IEEE80211_SMPS_OFF] = "off",
 184         [IEEE80211_SMPS_STATIC] = "static",
 185         [IEEE80211_SMPS_DYNAMIC] = "dynamic",
 186 };
 187
 188 static ssize_t ieee80211_if_fmt_smps(const struct ieee80211_sub_if_data *sdata,
 189                                      char *buf, int buflen)
 190 {
 191         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 192                 return -EOPNOTSUPP;
 193
 194         return snprintf(buf, buflen, "request: %s\nused: %s\n",
 195                         smps_modes[sdata->u.mgd.req_smps],
 196                         smps_modes[sdata->u.mgd.ap_smps]);
 197 }
 198
 199 static ssize_t ieee80211_if_parse_smps(struct ieee80211_sub_if_data *sdata,
 200                                        const char *buf, int buflen)
 201 {
 202         enum ieee80211_smps_mode mode;
 203
 204         for (mode = 0; mode < IEEE80211_SMPS_NUM_MODES; mode++) {
 205                 if (strncmp(buf, smps_modes[mode], buflen) == 0) {
 206                         int err = ieee80211_set_smps(sdata, mode);
 207                         if (!err)
 208                                 return buflen;
 209                         return err;
 210                 }
 211         }
 212
 213         return -EINVAL;
 214 }
 215
 216 __IEEE80211_IF_FILE_W(smps);
 217
 218 /* AP attributes */
 219 IEEE80211_IF_FILE(num_sta_ps, u.ap.num_sta_ps, ATOMIC);
 220 IEEE80211_IF_FILE(dtim_count, u.ap.dtim_count, DEC);
 221
 222 static ssize_t ieee80211_if_fmt_num_buffered_multicast(
 223         const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
 224 {
 225         return scnprintf(buf, buflen, "%u\n",
 226                          skb_queue_len(&sdata->u.ap.ps_bc_buf));
 227 }
 228 __IEEE80211_IF_FILE(num_buffered_multicast, NULL);
 229
 230 /* WDS attributes */
 231 IEEE80211_IF_FILE(peer, u.wds.remote_addr, MAC);
 232
 233 #ifdef CONFIG_MAC80211_MESH
 234 /* Mesh stats attributes */
 235 IEEE80211_IF_FILE(fwded_mcast, u.mesh.mshstats.fwded_mcast, DEC);
 236 IEEE80211_IF_FILE(fwded_unicast, u.mesh.mshstats.fwded_unicast, DEC);
 237 IEEE80211_IF_FILE(fwded_frames, u.mesh.mshstats.fwded_frames, DEC);
 238 IEEE80211_IF_FILE(dropped_frames_ttl, u.mesh.mshstats.dropped_frames_ttl, DEC);
 239 IEEE80211_IF_FILE(dropped_frames_no_route,
 240                 u.mesh.mshstats.dropped_frames_no_route, DEC);
 241 IEEE80211_IF_FILE(estab_plinks, u.mesh.mshstats.estab_plinks, ATOMIC);
 242
 243 /* Mesh parameters */
 244 IEEE80211_IF_FILE(dot11MeshMaxRetries,
 245                 u.mesh.mshcfg.dot11MeshMaxRetries, DEC);
 246 IEEE80211_IF_FILE(dot11MeshRetryTimeout,
 247                 u.mesh.mshcfg.dot11MeshRetryTimeout, DEC);
 248 IEEE80211_IF_FILE(dot11MeshConfirmTimeout,
 249                 u.mesh.mshcfg.dot11MeshConfirmTimeout, DEC);
 250 IEEE80211_IF_FILE(dot11MeshHoldingTimeout,
 251                 u.mesh.mshcfg.dot11MeshHoldingTimeout, DEC);
 252 IEEE80211_IF_FILE(dot11MeshTTL, u.mesh.mshcfg.dot11MeshTTL, DEC);
 253 IEEE80211_IF_FILE(auto_open_plinks, u.mesh.mshcfg.auto_open_plinks, DEC);
 254 IEEE80211_IF_FILE(dot11MeshMaxPeerLinks,
 255                 u.mesh.mshcfg.dot11MeshMaxPeerLinks, DEC);
 256 IEEE80211_IF_FILE(dot11MeshHWMPactivePathTimeout,
 257                 u.mesh.mshcfg.dot11MeshHWMPactivePathTimeout, DEC);
 258 IEEE80211_IF_FILE(dot11MeshHWMPpreqMinInterval,
 259                 u.mesh.mshcfg.dot11MeshHWMPpreqMinInterval, DEC);
 260 IEEE80211_IF_FILE(dot11MeshHWMPnetDiameterTraversalTime,
 261                 u.mesh.mshcfg.dot11MeshHWMPnetDiameterTraversalTime, DEC);
 262 IEEE80211_IF_FILE(dot11MeshHWMPmaxPREQretries,
 263                 u.mesh.mshcfg.dot11MeshHWMPmaxPREQretries, DEC);
 264 IEEE80211_IF_FILE(path_refresh_time,
 265                 u.mesh.mshcfg.path_refresh_time, DEC);
 266 IEEE80211_IF_FILE(min_discovery_timeout,
 267                 u.mesh.mshcfg.min_discovery_timeout, DEC);
 268 IEEE80211_IF_FILE(dot11MeshHWMPRootMode,
 269                 u.mesh.mshcfg.dot11MeshHWMPRootMode, DEC);
 270 #endif
 271
 272
 273 #define DEBUGFS_ADD(name) \
 274         debugfs_create_file(#name, 0400, sdata->debugfs.dir, \
 275                             sdata, &name##_ops);
 276
 277 #define DEBUGFS_ADD_MODE(name, mode) \
 278         debugfs_create_file(#name, mode, sdata->debugfs.dir, \
 279                             sdata, &name##_ops);
 280
 281 static void add_sta_files(struct ieee80211_sub_if_data *sdata)
 282 {
 283         DEBUGFS_ADD(drop_unencrypted);
 284         DEBUGFS_ADD(rc_rateidx_mask_2ghz);
 285         DEBUGFS_ADD(rc_rateidx_mask_5ghz);
 286
 287         DEBUGFS_ADD(bssid);
 288         DEBUGFS_ADD(aid);
 289         DEBUGFS_ADD(last_beacon);
 290         DEBUGFS_ADD(ave_beacon);
 291         DEBUGFS_ADD_MODE(smps, 0600);
 292 }
 293
 294 static void add_ap_files(struct ieee80211_sub_if_data *sdata)
 295 {
 296         DEBUGFS_ADD(drop_unencrypted);
 297         DEBUGFS_ADD(rc_rateidx_mask_2ghz);
 298         DEBUGFS_ADD(rc_rateidx_mask_5ghz);
 299
 300         DEBUGFS_ADD(num_sta_ps);
 301         DEBUGFS_ADD(dtim_count);
 302         DEBUGFS_ADD(num_buffered_multicast);
 303 }
 304
 305 static void add_wds_files(struct ieee80211_sub_if_data *sdata)
 306 {
 307         DEBUGFS_ADD(drop_unencrypted);
 308         DEBUGFS_ADD(rc_rateidx_mask_2ghz);
 309         DEBUGFS_ADD(rc_rateidx_mask_5ghz);
 310
 311         DEBUGFS_ADD(peer);
 312 }
 313
 314 static void add_vlan_files(struct ieee80211_sub_if_data *sdata)
 315 {
 316         DEBUGFS_ADD(drop_unencrypted);
 317         DEBUGFS_ADD(rc_rateidx_mask_2ghz);
 318         DEBUGFS_ADD(rc_rateidx_mask_5ghz);
 319 }
 320
 321 static void add_monitor_files(struct ieee80211_sub_if_data *sdata)
 322 {
 323 }
 324
 325 #ifdef CONFIG_MAC80211_MESH
 326
 327 static void add_mesh_stats(struct ieee80211_sub_if_data *sdata)
 328 {
 329         struct dentry *dir = debugfs_create_dir("mesh_stats",
 330                                                 sdata->debugfs.dir);
 331
 332 #define MESHSTATS_ADD(name)\
 333         debugfs_create_file(#name, 0400, dir, sdata, &name##_ops);
 334
 335         MESHSTATS_ADD(fwded_mcast);
 336         MESHSTATS_ADD(fwded_unicast);
 337         MESHSTATS_ADD(fwded_frames);
 338         MESHSTATS_ADD(dropped_frames_ttl);
 339         MESHSTATS_ADD(dropped_frames_no_route);
 340         MESHSTATS_ADD(estab_plinks);
 341 #undef MESHSTATS_ADD
 342 }
 343
 344 static void add_mesh_config(struct ieee80211_sub_if_data *sdata)
 345 {
 346         struct dentry *dir = debugfs_create_dir("mesh_config",
 347                                                 sdata->debugfs.dir);
 348
 349 #define MESHPARAMS_ADD(name) \
 350         debugfs_create_file(#name, 0600, dir, sdata, &name##_ops);
 351
 352         MESHPARAMS_ADD(dot11MeshMaxRetries);
 353         MESHPARAMS_ADD(dot11MeshRetryTimeout);
 354         MESHPARAMS_ADD(dot11MeshConfirmTimeout);
 355         MESHPARAMS_ADD(dot11MeshHoldingTimeout);
 356         MESHPARAMS_ADD(dot11MeshTTL);
 357         MESHPARAMS_ADD(auto_open_plinks);
 358         MESHPARAMS_ADD(dot11MeshMaxPeerLinks);
 359         MESHPARAMS_ADD(dot11MeshHWMPactivePathTimeout);
 360         MESHPARAMS_ADD(dot11MeshHWMPpreqMinInterval);
 361         MESHPARAMS_ADD(dot11MeshHWMPnetDiameterTraversalTime);
 362         MESHPARAMS_ADD(dot11MeshHWMPmaxPREQretries);
 363         MESHPARAMS_ADD(path_refresh_time);
 364         MESHPARAMS_ADD(min_discovery_timeout);
 365
 366 #undef MESHPARAMS_ADD
 367 }
 368 #endif
 369
 370 static void add_files(struct ieee80211_sub_if_data *sdata)
 371 {
 372         if (!sdata->debugfs.dir)
 373                 return;
 374
 375         switch (sdata->vif.type) {
 376         case NL80211_IFTYPE_MESH_POINT:
 377 #ifdef CONFIG_MAC80211_MESH
 378                 add_mesh_stats(sdata);
 379                 add_mesh_config(sdata);
 380 #endif
 381                 break;
 382         case NL80211_IFTYPE_STATION:
 383                 add_sta_files(sdata);
 384                 break;
 385         case NL80211_IFTYPE_ADHOC:
 386                 /* XXX */
 387                 break;
 388         case NL80211_IFTYPE_AP:
 389                 add_ap_files(sdata);
 390                 break;
 391         case NL80211_IFTYPE_WDS:
 392                 add_wds_files(sdata);
 393                 break;
 394         case NL80211_IFTYPE_MONITOR:
 395                 add_monitor_files(sdata);
 396                 break;
 397         case NL80211_IFTYPE_AP_VLAN:
 398                 add_vlan_files(sdata);
 399                 break;
 400         default:
 401                 break;
 402         }
 403 }
 404
 405 void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata)
 406 {
 407         char buf[10+IFNAMSIZ];
 408
 409         sprintf(buf, "netdev:%s", sdata->name);
 410         sdata->debugfs.dir = debugfs_create_dir(buf,
 411                 sdata->local->hw.wiphy->debugfsdir);
 412         add_files(sdata);
 413 }
 414
 415 void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata)
 416 {
 417         if (!sdata->debugfs.dir)
 418                 return;
 419
 420         debugfs_remove_recursive(sdata->debugfs.dir);
 421         sdata->debugfs.dir = NULL;
 422 }
 423
 424 void ieee80211_debugfs_rename_netdev(struct ieee80211_sub_if_data *sdata)
 425 {
 426         struct dentry *dir;
 427         char buf[10 + IFNAMSIZ];
 428
 429         dir = sdata->debugfs.dir;
 430
 431         if (!dir)
 432                 return;
 433
 434         sprintf(buf, "netdev:%s", sdata->name);
 435         if (!debugfs_rename(dir->d_parent, dir, dir->d_parent, buf))
 436                 printk(KERN_ERR "mac80211: debugfs: failed to rename debugfs "
 437                        "dir to %s\n", buf);
 438 }