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_FILE(name, _write)                               \
 103 static ssize_t ieee80211_if_read_##name(struct file *file,              \
 104                                         char __user *userbuf,           \
 105                                         size_t count, loff_t *ppos)     \
 106 {                                                                       \
 107         return ieee80211_if_read(file->private_data,                    \
 108                                  userbuf, count, ppos,                  \
 109                                  ieee80211_if_fmt_##name);              \
 110 }                                                                       \
 111 static const struct file_operations name##_ops = {                      \
 112         .read = ieee80211_if_read_##name,                               \
 113         .write = (_write),                                              \
 114         .open = mac80211_open_file_generic,                             \
 115 }
 116
 117 #define __IEEE80211_IF_FILE_W(name)                                     \
 118 static ssize_t ieee80211_if_write_##name(struct file *file,             \
 119                                          const char __user *userbuf,    \
 120                                          size_t count, loff_t *ppos)    \
 121 {                                                                       \
 122         return ieee80211_if_write(file->private_data, userbuf, count,   \
 123                                   ppos, ieee80211_if_parse_##name);     \
 124 }                                                                       \
 125 __IEEE80211_IF_FILE(name, ieee80211_if_write_##name)
 126
 127
 128 #define IEEE80211_IF_FILE(name, field, format)                          \
 129                 IEEE80211_IF_FMT_##format(name, field)                  \
 130                 __IEEE80211_IF_FILE(name, NULL)
 131
 132 /* common attributes */
 133 IEEE80211_IF_FILE(drop_unencrypted, drop_unencrypted, DEC);
 134 IEEE80211_IF_FILE(rc_rateidx_mask_2ghz, rc_rateidx_mask[IEEE80211_BAND_2GHZ],
 135                   HEX);
 136 IEEE80211_IF_FILE(rc_rateidx_mask_5ghz, rc_rateidx_mask[IEEE80211_BAND_5GHZ],
 137                   HEX);
 138
 139 /* STA attributes */
 140 IEEE80211_IF_FILE(bssid, u.mgd.bssid, MAC);
 141 IEEE80211_IF_FILE(aid, u.mgd.aid, DEC);
 142
 143 static int ieee80211_set_smps(struct ieee80211_sub_if_data *sdata,
 144                               enum ieee80211_smps_mode smps_mode)
 145 {
 146         struct ieee80211_local *local = sdata->local;
 147         int err;
 148
 149         if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_STATIC_SMPS) &&
 150             smps_mode == IEEE80211_SMPS_STATIC)
 151                 return -EINVAL;
 152
 153         /* auto should be dynamic if in PS mode */
 154         if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS) &&
 155             (smps_mode == IEEE80211_SMPS_DYNAMIC ||
 156              smps_mode == IEEE80211_SMPS_AUTOMATIC))
 157                 return -EINVAL;
 158
 159         /* supported only on managed interfaces for now */
 160         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 161                 return -EOPNOTSUPP;
 162
 163         mutex_lock(&local->iflist_mtx);
 164         err = __ieee80211_request_smps(sdata, smps_mode);
 165         mutex_unlock(&local->iflist_mtx);
 166
 167         return err;
 168 }
 169
 170 static const char *smps_modes[IEEE80211_SMPS_NUM_MODES] = {
 171         [IEEE80211_SMPS_AUTOMATIC] = "auto",
 172         [IEEE80211_SMPS_OFF] = "off",
 173         [IEEE80211_SMPS_STATIC] = "static",
 174         [IEEE80211_SMPS_DYNAMIC] = "dynamic",
 175 };
 176
 177 static ssize_t ieee80211_if_fmt_smps(const struct ieee80211_sub_if_data *sdata,
 178                                      char *buf, int buflen)
 179 {
 180         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 181                 return -EOPNOTSUPP;
 182
 183         return snprintf(buf, buflen, "request: %s\nused: %s\n",
 184                         smps_modes[sdata->u.mgd.req_smps],
 185                         smps_modes[sdata->u.mgd.ap_smps]);
 186 }
 187
 188 static ssize_t ieee80211_if_parse_smps(struct ieee80211_sub_if_data *sdata,
 189                                        const char *buf, int buflen)
 190 {
 191         enum ieee80211_smps_mode mode;
 192
 193         for (mode = 0; mode < IEEE80211_SMPS_NUM_MODES; mode++) {
 194                 if (strncmp(buf, smps_modes[mode], buflen) == 0) {
 195                         int err = ieee80211_set_smps(sdata, mode);
 196                         if (!err)
 197                                 return buflen;
 198                         return err;
 199                 }
 200         }
 201
 202         return -EINVAL;
 203 }
 204
 205 __IEEE80211_IF_FILE_W(smps);
 206
 207 /* AP attributes */
 208 IEEE80211_IF_FILE(num_sta_ps, u.ap.num_sta_ps, ATOMIC);
 209 IEEE80211_IF_FILE(dtim_count, u.ap.dtim_count, DEC);
 210
 211 static ssize_t ieee80211_if_fmt_num_buffered_multicast(
 212         const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
 213 {
 214         return scnprintf(buf, buflen, "%u\n",
 215                          skb_queue_len(&sdata->u.ap.ps_bc_buf));
 216 }
 217 __IEEE80211_IF_FILE(num_buffered_multicast, NULL);
 218
 219 /* WDS attributes */
 220 IEEE80211_IF_FILE(peer, u.wds.remote_addr, MAC);
 221
 222 #ifdef CONFIG_MAC80211_MESH
 223 /* Mesh stats attributes */
 224 IEEE80211_IF_FILE(fwded_mcast, u.mesh.mshstats.fwded_mcast, DEC);
 225 IEEE80211_IF_FILE(fwded_unicast, u.mesh.mshstats.fwded_unicast, DEC);
 226 IEEE80211_IF_FILE(fwded_frames, u.mesh.mshstats.fwded_frames, DEC);
 227 IEEE80211_IF_FILE(dropped_frames_ttl, u.mesh.mshstats.dropped_frames_ttl, DEC);
 228 IEEE80211_IF_FILE(dropped_frames_no_route,
 229                 u.mesh.mshstats.dropped_frames_no_route, DEC);
 230 IEEE80211_IF_FILE(estab_plinks, u.mesh.mshstats.estab_plinks, ATOMIC);
 231
 232 /* Mesh parameters */
 233 IEEE80211_IF_FILE(dot11MeshMaxRetries,
 234                 u.mesh.mshcfg.dot11MeshMaxRetries, DEC);
 235 IEEE80211_IF_FILE(dot11MeshRetryTimeout,
 236                 u.mesh.mshcfg.dot11MeshRetryTimeout, DEC);
 237 IEEE80211_IF_FILE(dot11MeshConfirmTimeout,
 238                 u.mesh.mshcfg.dot11MeshConfirmTimeout, DEC);
 239 IEEE80211_IF_FILE(dot11MeshHoldingTimeout,
 240                 u.mesh.mshcfg.dot11MeshHoldingTimeout, DEC);
 241 IEEE80211_IF_FILE(dot11MeshTTL, u.mesh.mshcfg.dot11MeshTTL, DEC);
 242 IEEE80211_IF_FILE(auto_open_plinks, u.mesh.mshcfg.auto_open_plinks, DEC);
 243 IEEE80211_IF_FILE(dot11MeshMaxPeerLinks,
 244                 u.mesh.mshcfg.dot11MeshMaxPeerLinks, DEC);
 245 IEEE80211_IF_FILE(dot11MeshHWMPactivePathTimeout,
 246                 u.mesh.mshcfg.dot11MeshHWMPactivePathTimeout, DEC);
 247 IEEE80211_IF_FILE(dot11MeshHWMPpreqMinInterval,
 248                 u.mesh.mshcfg.dot11MeshHWMPpreqMinInterval, DEC);
 249 IEEE80211_IF_FILE(dot11MeshHWMPnetDiameterTraversalTime,
 250                 u.mesh.mshcfg.dot11MeshHWMPnetDiameterTraversalTime, DEC);
 251 IEEE80211_IF_FILE(dot11MeshHWMPmaxPREQretries,
 252                 u.mesh.mshcfg.dot11MeshHWMPmaxPREQretries, DEC);
 253 IEEE80211_IF_FILE(path_refresh_time,
 254                 u.mesh.mshcfg.path_refresh_time, DEC);
 255 IEEE80211_IF_FILE(min_discovery_timeout,
 256                 u.mesh.mshcfg.min_discovery_timeout, DEC);
 257 IEEE80211_IF_FILE(dot11MeshHWMPRootMode,
 258                 u.mesh.mshcfg.dot11MeshHWMPRootMode, DEC);
 259 #endif
 260
 261
 262 #define DEBUGFS_ADD(name) \
 263         debugfs_create_file(#name, 0400, sdata->debugfs.dir, \
 264                             sdata, &name##_ops);
 265
 266 #define DEBUGFS_ADD_MODE(name, mode) \
 267         debugfs_create_file(#name, mode, sdata->debugfs.dir, \
 268                             sdata, &name##_ops);
 269
 270 static void add_sta_files(struct ieee80211_sub_if_data *sdata)
 271 {
 272         DEBUGFS_ADD(drop_unencrypted);
 273         DEBUGFS_ADD(rc_rateidx_mask_2ghz);
 274         DEBUGFS_ADD(rc_rateidx_mask_5ghz);
 275
 276         DEBUGFS_ADD(bssid);
 277         DEBUGFS_ADD(aid);
 278         DEBUGFS_ADD_MODE(smps, 0600);
 279 }
 280
 281 static void add_ap_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(num_sta_ps);
 288         DEBUGFS_ADD(dtim_count);
 289         DEBUGFS_ADD(num_buffered_multicast);
 290 }
 291
 292 static void add_wds_files(struct ieee80211_sub_if_data *sdata)
 293 {
 294         DEBUGFS_ADD(drop_unencrypted);
 295         DEBUGFS_ADD(rc_rateidx_mask_2ghz);
 296         DEBUGFS_ADD(rc_rateidx_mask_5ghz);
 297
 298         DEBUGFS_ADD(peer);
 299 }
 300
 301 static void add_vlan_files(struct ieee80211_sub_if_data *sdata)
 302 {
 303         DEBUGFS_ADD(drop_unencrypted);
 304         DEBUGFS_ADD(rc_rateidx_mask_2ghz);
 305         DEBUGFS_ADD(rc_rateidx_mask_5ghz);
 306 }
 307
 308 static void add_monitor_files(struct ieee80211_sub_if_data *sdata)
 309 {
 310 }
 311
 312 #ifdef CONFIG_MAC80211_MESH
 313
 314 static void add_mesh_stats(struct ieee80211_sub_if_data *sdata)
 315 {
 316         struct dentry *dir = debugfs_create_dir("mesh_stats",
 317                                                 sdata->debugfs.dir);
 318
 319 #define MESHSTATS_ADD(name)\
 320         debugfs_create_file(#name, 0400, dir, sdata, &name##_ops);
 321
 322         MESHSTATS_ADD(fwded_mcast);
 323         MESHSTATS_ADD(fwded_unicast);
 324         MESHSTATS_ADD(fwded_frames);
 325         MESHSTATS_ADD(dropped_frames_ttl);
 326         MESHSTATS_ADD(dropped_frames_no_route);
 327         MESHSTATS_ADD(estab_plinks);
 328 #undef MESHSTATS_ADD
 329 }
 330
 331 static void add_mesh_config(struct ieee80211_sub_if_data *sdata)
 332 {
 333         struct dentry *dir = debugfs_create_dir("mesh_config",
 334                                                 sdata->debugfs.dir);
 335
 336 #define MESHPARAMS_ADD(name) \
 337         debugfs_create_file(#name, 0600, dir, sdata, &name##_ops);
 338
 339         MESHPARAMS_ADD(dot11MeshMaxRetries);
 340         MESHPARAMS_ADD(dot11MeshRetryTimeout);
 341         MESHPARAMS_ADD(dot11MeshConfirmTimeout);
 342         MESHPARAMS_ADD(dot11MeshHoldingTimeout);
 343         MESHPARAMS_ADD(dot11MeshTTL);
 344         MESHPARAMS_ADD(auto_open_plinks);
 345         MESHPARAMS_ADD(dot11MeshMaxPeerLinks);
 346         MESHPARAMS_ADD(dot11MeshHWMPactivePathTimeout);
 347         MESHPARAMS_ADD(dot11MeshHWMPpreqMinInterval);
 348         MESHPARAMS_ADD(dot11MeshHWMPnetDiameterTraversalTime);
 349         MESHPARAMS_ADD(dot11MeshHWMPmaxPREQretries);
 350         MESHPARAMS_ADD(path_refresh_time);
 351         MESHPARAMS_ADD(min_discovery_timeout);
 352
 353 #undef MESHPARAMS_ADD
 354 }
 355 #endif
 356
 357 static void add_files(struct ieee80211_sub_if_data *sdata)
 358 {
 359         if (!sdata->debugfs.dir)
 360                 return;
 361
 362         switch (sdata->vif.type) {
 363         case NL80211_IFTYPE_MESH_POINT:
 364 #ifdef CONFIG_MAC80211_MESH
 365                 add_mesh_stats(sdata);
 366                 add_mesh_config(sdata);
 367 #endif
 368                 break;
 369         case NL80211_IFTYPE_STATION:
 370                 add_sta_files(sdata);
 371                 break;
 372         case NL80211_IFTYPE_ADHOC:
 373                 /* XXX */
 374                 break;
 375         case NL80211_IFTYPE_AP:
 376                 add_ap_files(sdata);
 377                 break;
 378         case NL80211_IFTYPE_WDS:
 379                 add_wds_files(sdata);
 380                 break;
 381         case NL80211_IFTYPE_MONITOR:
 382                 add_monitor_files(sdata);
 383                 break;
 384         case NL80211_IFTYPE_AP_VLAN:
 385                 add_vlan_files(sdata);
 386                 break;
 387         default:
 388                 break;
 389         }
 390 }
 391
 392 void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata)
 393 {
 394         char buf[10+IFNAMSIZ];
 395
 396         sprintf(buf, "netdev:%s", sdata->name);
 397         sdata->debugfs.dir = debugfs_create_dir(buf,
 398                 sdata->local->hw.wiphy->debugfsdir);
 399         add_files(sdata);
 400 }
 401
 402 void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata)
 403 {
 404         if (!sdata->debugfs.dir)
 405                 return;
 406
 407         debugfs_remove_recursive(sdata->debugfs.dir);
 408         sdata->debugfs.dir = NULL;
 409 }
 410
 411 void ieee80211_debugfs_rename_netdev(struct ieee80211_sub_if_data *sdata)
 412 {
 413         struct dentry *dir;
 414         char buf[10 + IFNAMSIZ];
 415
 416         dir = sdata->debugfs.dir;
 417
 418         if (!dir)
 419                 return;
 420
 421         sprintf(buf, "netdev:%s", sdata->name);
 422         if (!debugfs_rename(dir->d_parent, dir, dir->d_parent, buf))
 423                 printk(KERN_ERR "mac80211: debugfs: failed to rename debugfs "
 424                        "dir to %s\n", buf);
 425 }