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_FILE(name, _write)                               \
 104 static ssize_t ieee80211_if_read_##name(struct file *file,              \
 105                                         char __user *userbuf,           \
 106                                         size_t count, loff_t *ppos)     \
 107 {                                                                       \
 108         return ieee80211_if_read(file->private_data,                    \
 109                                  userbuf, count, ppos,                  \
 110                                  ieee80211_if_fmt_##name);              \
 111 }                                                                       \
 112 static const struct file_operations name##_ops = {                      \
 113         .read = ieee80211_if_read_##name,                               \
 114         .write = (_write),                                              \
 115         .open = mac80211_open_file_generic,                             \
 116 }
 117
 118 #define __IEEE80211_IF_FILE_W(name)                                     \
 119 static ssize_t ieee80211_if_write_##name(struct file *file,             \
 120                                          const char __user *userbuf,    \
 121                                          size_t count, loff_t *ppos)    \
 122 {                                                                       \
 123         return ieee80211_if_write(file->private_data, userbuf, count,   \
 124                                   ppos, ieee80211_if_parse_##name);     \
 125 }                                                                       \
 126 __IEEE80211_IF_FILE(name, ieee80211_if_write_##name)
 127
 128
 129 #define IEEE80211_IF_FILE(name, field, format)                          \
 130                 IEEE80211_IF_FMT_##format(name, field)                  \
 131                 __IEEE80211_IF_FILE(name, NULL)
 132
 133 /* common attributes */
 134 IEEE80211_IF_FILE(drop_unencrypted, drop_unencrypted, DEC);
 135 IEEE80211_IF_FILE(rc_rateidx_mask_2ghz, rc_rateidx_mask[IEEE80211_BAND_2GHZ],
 136                   HEX);
 137 IEEE80211_IF_FILE(rc_rateidx_mask_5ghz, rc_rateidx_mask[IEEE80211_BAND_5GHZ],
 138                   HEX);
 139
 140 /* STA attributes */
 141 IEEE80211_IF_FILE(bssid, u.mgd.bssid, MAC);
 142 IEEE80211_IF_FILE(aid, u.mgd.aid, DEC);
 143
 144 static int ieee80211_set_smps(struct ieee80211_sub_if_data *sdata,
 145                               enum ieee80211_smps_mode smps_mode)
 146 {
 147         struct ieee80211_local *local = sdata->local;
 148         int err;
 149
 150         if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_STATIC_SMPS) &&
 151             smps_mode == IEEE80211_SMPS_STATIC)
 152                 return -EINVAL;
 153
 154         /* auto should be dynamic if in PS mode */
 155         if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS) &&
 156             (smps_mode == IEEE80211_SMPS_DYNAMIC ||
 157              smps_mode == IEEE80211_SMPS_AUTOMATIC))
 158                 return -EINVAL;
 159
 160         /* supported only on managed interfaces for now */
 161         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 162                 return -EOPNOTSUPP;
 163
 164         mutex_lock(&local->iflist_mtx);
 165         err = __ieee80211_request_smps(sdata, smps_mode);
 166         mutex_unlock(&local->iflist_mtx);
 167
 168         return err;
 169 }
 170
 171 static const char *smps_modes[IEEE80211_SMPS_NUM_MODES] = {
 172         [IEEE80211_SMPS_AUTOMATIC] = "auto",
 173         [IEEE80211_SMPS_OFF] = "off",
 174         [IEEE80211_SMPS_STATIC] = "static",
 175         [IEEE80211_SMPS_DYNAMIC] = "dynamic",
 176 };
 177
 178 static ssize_t ieee80211_if_fmt_smps(const struct ieee80211_sub_if_data *sdata,
 179                                      char *buf, int buflen)
 180 {
 181         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 182                 return -EOPNOTSUPP;
 183
 184         return snprintf(buf, buflen, "request: %s\nused: %s\n",
 185                         smps_modes[sdata->u.mgd.req_smps],
 186                         smps_modes[sdata->u.mgd.ap_smps]);
 187 }
 188
 189 static ssize_t ieee80211_if_parse_smps(struct ieee80211_sub_if_data *sdata,
 190                                        const char *buf, int buflen)
 191 {
 192         enum ieee80211_smps_mode mode;
 193
 194         for (mode = 0; mode < IEEE80211_SMPS_NUM_MODES; mode++) {
 195                 if (strncmp(buf, smps_modes[mode], buflen) == 0) {
 196                         int err = ieee80211_set_smps(sdata, mode);
 197                         if (!err)
 198                                 return buflen;
 199                         return err;
 200                 }
 201         }
 202
 203         return -EINVAL;
 204 }
 205
 206 __IEEE80211_IF_FILE_W(smps);
 207
 208 /* AP attributes */
 209 IEEE80211_IF_FILE(num_sta_ps, u.ap.num_sta_ps, ATOMIC);
 210 IEEE80211_IF_FILE(dtim_count, u.ap.dtim_count, DEC);
 211
 212 static ssize_t ieee80211_if_fmt_num_buffered_multicast(
 213         const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
 214 {
 215         return scnprintf(buf, buflen, "%u\n",
 216                          skb_queue_len(&sdata->u.ap.ps_bc_buf));
 217 }
 218 __IEEE80211_IF_FILE(num_buffered_multicast, NULL);
 219
 220 /* WDS attributes */
 221 IEEE80211_IF_FILE(peer, u.wds.remote_addr, MAC);
 222
 223 #ifdef CONFIG_MAC80211_MESH
 224 /* Mesh stats attributes */
 225 IEEE80211_IF_FILE(fwded_mcast, u.mesh.mshstats.fwded_mcast, DEC);
 226 IEEE80211_IF_FILE(fwded_unicast, u.mesh.mshstats.fwded_unicast, DEC);
 227 IEEE80211_IF_FILE(fwded_frames, u.mesh.mshstats.fwded_frames, DEC);
 228 IEEE80211_IF_FILE(dropped_frames_ttl, u.mesh.mshstats.dropped_frames_ttl, DEC);
 229 IEEE80211_IF_FILE(dropped_frames_no_route,
 230                 u.mesh.mshstats.dropped_frames_no_route, DEC);
 231 IEEE80211_IF_FILE(estab_plinks, u.mesh.mshstats.estab_plinks, ATOMIC);
 232
 233 /* Mesh parameters */
 234 IEEE80211_IF_FILE(dot11MeshMaxRetries,
 235                 u.mesh.mshcfg.dot11MeshMaxRetries, DEC);
 236 IEEE80211_IF_FILE(dot11MeshRetryTimeout,
 237                 u.mesh.mshcfg.dot11MeshRetryTimeout, DEC);
 238 IEEE80211_IF_FILE(dot11MeshConfirmTimeout,
 239                 u.mesh.mshcfg.dot11MeshConfirmTimeout, DEC);
 240 IEEE80211_IF_FILE(dot11MeshHoldingTimeout,
 241                 u.mesh.mshcfg.dot11MeshHoldingTimeout, DEC);
 242 IEEE80211_IF_FILE(dot11MeshTTL, u.mesh.mshcfg.dot11MeshTTL, DEC);
 243 IEEE80211_IF_FILE(auto_open_plinks, u.mesh.mshcfg.auto_open_plinks, DEC);
 244 IEEE80211_IF_FILE(dot11MeshMaxPeerLinks,
 245                 u.mesh.mshcfg.dot11MeshMaxPeerLinks, DEC);
 246 IEEE80211_IF_FILE(dot11MeshHWMPactivePathTimeout,
 247                 u.mesh.mshcfg.dot11MeshHWMPactivePathTimeout, DEC);
 248 IEEE80211_IF_FILE(dot11MeshHWMPpreqMinInterval,
 249                 u.mesh.mshcfg.dot11MeshHWMPpreqMinInterval, DEC);
 250 IEEE80211_IF_FILE(dot11MeshHWMPnetDiameterTraversalTime,
 251                 u.mesh.mshcfg.dot11MeshHWMPnetDiameterTraversalTime, DEC);
 252 IEEE80211_IF_FILE(dot11MeshHWMPmaxPREQretries,
 253                 u.mesh.mshcfg.dot11MeshHWMPmaxPREQretries, DEC);
 254 IEEE80211_IF_FILE(path_refresh_time,
 255                 u.mesh.mshcfg.path_refresh_time, DEC);
 256 IEEE80211_IF_FILE(min_discovery_timeout,
 257                 u.mesh.mshcfg.min_discovery_timeout, DEC);
 258 IEEE80211_IF_FILE(dot11MeshHWMPRootMode,
 259                 u.mesh.mshcfg.dot11MeshHWMPRootMode, DEC);
 260 #endif
 261
 262
 263 #define DEBUGFS_ADD(name) \
 264         debugfs_create_file(#name, 0400, sdata->debugfs.dir, \
 265                             sdata, &name##_ops);
 266
 267 #define DEBUGFS_ADD_MODE(name, mode) \
 268         debugfs_create_file(#name, mode, sdata->debugfs.dir, \
 269                             sdata, &name##_ops);
 270
 271 static void add_sta_files(struct ieee80211_sub_if_data *sdata)
 272 {
 273         DEBUGFS_ADD(drop_unencrypted);
 274         DEBUGFS_ADD(rc_rateidx_mask_2ghz);
 275         DEBUGFS_ADD(rc_rateidx_mask_5ghz);
 276
 277         DEBUGFS_ADD(bssid);
 278         DEBUGFS_ADD(aid);
 279         DEBUGFS_ADD_MODE(smps, 0600);
 280 }
 281
 282 static void add_ap_files(struct ieee80211_sub_if_data *sdata)
 283 {
 284         DEBUGFS_ADD(drop_unencrypted);
 285         DEBUGFS_ADD(rc_rateidx_mask_2ghz);
 286         DEBUGFS_ADD(rc_rateidx_mask_5ghz);
 287
 288         DEBUGFS_ADD(num_sta_ps);
 289         DEBUGFS_ADD(dtim_count);
 290         DEBUGFS_ADD(num_buffered_multicast);
 291 }
 292
 293 static void add_wds_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(peer);
 300 }
 301
 302 static void add_vlan_files(struct ieee80211_sub_if_data *sdata)
 303 {
 304         DEBUGFS_ADD(drop_unencrypted);
 305         DEBUGFS_ADD(rc_rateidx_mask_2ghz);
 306         DEBUGFS_ADD(rc_rateidx_mask_5ghz);
 307 }
 308
 309 static void add_monitor_files(struct ieee80211_sub_if_data *sdata)
 310 {
 311 }
 312
 313 #ifdef CONFIG_MAC80211_MESH
 314
 315 static void add_mesh_stats(struct ieee80211_sub_if_data *sdata)
 316 {
 317         struct dentry *dir = debugfs_create_dir("mesh_stats",
 318                                                 sdata->debugfs.dir);
 319
 320 #define MESHSTATS_ADD(name)\
 321         debugfs_create_file(#name, 0400, dir, sdata, &name##_ops);
 322
 323         MESHSTATS_ADD(fwded_mcast);
 324         MESHSTATS_ADD(fwded_unicast);
 325         MESHSTATS_ADD(fwded_frames);
 326         MESHSTATS_ADD(dropped_frames_ttl);
 327         MESHSTATS_ADD(dropped_frames_no_route);
 328         MESHSTATS_ADD(estab_plinks);
 329 #undef MESHSTATS_ADD
 330 }
 331
 332 static void add_mesh_config(struct ieee80211_sub_if_data *sdata)
 333 {
 334         struct dentry *dir = debugfs_create_dir("mesh_config",
 335                                                 sdata->debugfs.dir);
 336
 337 #define MESHPARAMS_ADD(name) \
 338         debugfs_create_file(#name, 0600, dir, sdata, &name##_ops);
 339
 340         MESHPARAMS_ADD(dot11MeshMaxRetries);
 341         MESHPARAMS_ADD(dot11MeshRetryTimeout);
 342         MESHPARAMS_ADD(dot11MeshConfirmTimeout);
 343         MESHPARAMS_ADD(dot11MeshHoldingTimeout);
 344         MESHPARAMS_ADD(dot11MeshTTL);
 345         MESHPARAMS_ADD(auto_open_plinks);
 346         MESHPARAMS_ADD(dot11MeshMaxPeerLinks);
 347         MESHPARAMS_ADD(dot11MeshHWMPactivePathTimeout);
 348         MESHPARAMS_ADD(dot11MeshHWMPpreqMinInterval);
 349         MESHPARAMS_ADD(dot11MeshHWMPnetDiameterTraversalTime);
 350         MESHPARAMS_ADD(dot11MeshHWMPmaxPREQretries);
 351         MESHPARAMS_ADD(path_refresh_time);
 352         MESHPARAMS_ADD(min_discovery_timeout);
 353
 354 #undef MESHPARAMS_ADD
 355 }
 356 #endif
 357
 358 static void add_files(struct ieee80211_sub_if_data *sdata)
 359 {
 360         if (!sdata->debugfs.dir)
 361                 return;
 362
 363         switch (sdata->vif.type) {
 364         case NL80211_IFTYPE_MESH_POINT:
 365 #ifdef CONFIG_MAC80211_MESH
 366                 add_mesh_stats(sdata);
 367                 add_mesh_config(sdata);
 368 #endif
 369                 break;
 370         case NL80211_IFTYPE_STATION:
 371                 add_sta_files(sdata);
 372                 break;
 373         case NL80211_IFTYPE_ADHOC:
 374                 /* XXX */
 375                 break;
 376         case NL80211_IFTYPE_AP:
 377                 add_ap_files(sdata);
 378                 break;
 379         case NL80211_IFTYPE_WDS:
 380                 add_wds_files(sdata);
 381                 break;
 382         case NL80211_IFTYPE_MONITOR:
 383                 add_monitor_files(sdata);
 384                 break;
 385         case NL80211_IFTYPE_AP_VLAN:
 386                 add_vlan_files(sdata);
 387                 break;
 388         default:
 389                 break;
 390         }
 391 }
 392
 393 void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata)
 394 {
 395         char buf[10+IFNAMSIZ];
 396
 397         sprintf(buf, "netdev:%s", sdata->name);
 398         sdata->debugfs.dir = debugfs_create_dir(buf,
 399                 sdata->local->hw.wiphy->debugfsdir);
 400         add_files(sdata);
 401 }
 402
 403 void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata)
 404 {
 405         if (!sdata->debugfs.dir)
 406                 return;
 407
 408         debugfs_remove_recursive(sdata->debugfs.dir);
 409         sdata->debugfs.dir = NULL;
 410 }
 411
 412 void ieee80211_debugfs_rename_netdev(struct ieee80211_sub_if_data *sdata)
 413 {
 414         struct dentry *dir;
 415         char buf[10 + IFNAMSIZ];
 416
 417         dir = sdata->debugfs.dir;
 418
 419         if (!dir)
 420                 return;
 421
 422         sprintf(buf, "netdev:%s", sdata->name);
 423         if (!debugfs_rename(dir->d_parent, dir, dir->d_parent, buf))
 424                 printk(KERN_ERR "mac80211: debugfs: failed to rename debugfs "
 425                        "dir to %s\n", buf);
 426 }