net/batman-adv/bat_sysfs.c

   1 /*
   2  * Copyright (C) 2010-2012 B.A.T.M.A.N. contributors:
   3  *
   4  * Marek Lindner
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of version 2 of the GNU General Public
   8  * License as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  18  * 02110-1301, USA
  19  *
  20  */
  21
  22 #include "main.h"
  23 #include "bat_sysfs.h"
  24 #include "translation-table.h"
  25 #include "originator.h"
  26 #include "hard-interface.h"
  27 #include "gateway_common.h"
  28 #include "gateway_client.h"
  29 #include "vis.h"
  30
  31 static struct net_device *kobj_to_netdev(struct kobject *obj)
  32 {
  33         struct device *dev = container_of(obj->parent, struct device, kobj);
  34         return to_net_dev(dev);
  35 }
  36
  37 static struct bat_priv *kobj_to_batpriv(struct kobject *obj)
  38 {
  39         struct net_device *net_dev = kobj_to_netdev(obj);
  40         return netdev_priv(net_dev);
  41 }
  42
  43 #define UEV_TYPE_VAR    "BATTYPE="
  44 #define UEV_ACTION_VAR  "BATACTION="
  45 #define UEV_DATA_VAR    "BATDATA="
  46
  47 static char *uev_action_str[] = {
  48         "add",
  49         "del",
  50         "change"
  51 };
  52
  53 static char *uev_type_str[] = {
  54         "gw"
  55 };
  56
  57 /* Use this, if you have customized show and store functions */
  58 #define BAT_ATTR(_name, _mode, _show, _store)   \
  59 struct bat_attribute bat_attr_##_name = {       \
  60         .attr = {.name = __stringify(_name),    \
  61                  .mode = _mode },               \
  62         .show   = _show,                        \
  63         .store  = _store,                       \
  64 };
  65
  66 #define BAT_ATTR_SIF_STORE_BOOL(_name, _post_func)                      \
  67 ssize_t store_##_name(struct kobject *kobj, struct attribute *attr,     \
  68                       char *buff, size_t count)                         \
  69 {                                                                       \
  70         struct net_device *net_dev = kobj_to_netdev(kobj);              \
  71         struct bat_priv *bat_priv = netdev_priv(net_dev);               \
  72         return __store_bool_attr(buff, count, _post_func, attr,         \
  73                                  &bat_priv->_name, net_dev);            \
  74 }
  75
  76 #define BAT_ATTR_SIF_SHOW_BOOL(_name)                                   \
  77 ssize_t show_##_name(struct kobject *kobj,                              \
  78                      struct attribute *attr, char *buff)                \
  79 {                                                                       \
  80         struct bat_priv *bat_priv = kobj_to_batpriv(kobj);              \
  81         return sprintf(buff, "%s\n",                                    \
  82                        atomic_read(&bat_priv->_name) == 0 ?             \
  83                        "disabled" : "enabled");                         \
  84 }                                                                       \
  85
  86 /* Use this, if you are going to turn a [name] in the soft-interface
  87  * (bat_priv) on or off */
  88 #define BAT_ATTR_SIF_BOOL(_name, _mode, _post_func)                     \
  89         static BAT_ATTR_SIF_STORE_BOOL(_name, _post_func)               \
  90         static BAT_ATTR_SIF_SHOW_BOOL(_name)                            \
  91         static BAT_ATTR(_name, _mode, show_##_name, store_##_name)
  92
  93
  94 #define BAT_ATTR_SIF_STORE_UINT(_name, _min, _max, _post_func)          \
  95 ssize_t store_##_name(struct kobject *kobj, struct attribute *attr,     \
  96                       char *buff, size_t count)                         \
  97 {                                                                       \
  98         struct net_device *net_dev = kobj_to_netdev(kobj);              \
  99         struct bat_priv *bat_priv = netdev_priv(net_dev);               \
 100         return __store_uint_attr(buff, count, _min, _max, _post_func,   \
 101                                  attr, &bat_priv->_name, net_dev);      \
 102 }
 103
 104 #define BAT_ATTR_SIF_SHOW_UINT(_name)                                   \
 105 ssize_t show_##_name(struct kobject *kobj,                              \
 106                      struct attribute *attr, char *buff)                \
 107 {                                                                       \
 108         struct bat_priv *bat_priv = kobj_to_batpriv(kobj);              \
 109         return sprintf(buff, "%i\n", atomic_read(&bat_priv->_name));    \
 110 }                                                                       \
 111
 112 /* Use this, if you are going to set [name] in the soft-interface
 113  * (bat_priv) to an unsigned integer value */
 114 #define BAT_ATTR_SIF_UINT(_name, _mode, _min, _max, _post_func)         \
 115         static BAT_ATTR_SIF_STORE_UINT(_name, _min, _max, _post_func)   \
 116         static BAT_ATTR_SIF_SHOW_UINT(_name)                            \
 117         static BAT_ATTR(_name, _mode, show_##_name, store_##_name)
 118
 119
 120 #define BAT_ATTR_HIF_STORE_UINT(_name, _min, _max, _post_func)          \
 121 ssize_t store_##_name(struct kobject *kobj, struct attribute *attr,     \
 122                       char *buff, size_t count)                         \
 123 {                                                                       \
 124         struct net_device *net_dev = kobj_to_netdev(kobj);              \
 125         struct hard_iface *hard_iface = hardif_get_by_netdev(net_dev);  \
 126         ssize_t length;                                                 \
 127                                                                         \
 128         if (!hard_iface)                                                \
 129                 return 0;                                               \
 130                                                                         \
 131         length = __store_uint_attr(buff, count, _min, _max, _post_func, \
 132                                    attr, &hard_iface->_name, net_dev);  \
 133                                                                         \
 134         hardif_free_ref(hard_iface);                                    \
 135         return length;                                                  \
 136 }
 137
 138 #define BAT_ATTR_HIF_SHOW_UINT(_name)                                   \
 139 ssize_t show_##_name(struct kobject *kobj,                              \
 140                      struct attribute *attr, char *buff)                \
 141 {                                                                       \
 142         struct net_device *net_dev = kobj_to_netdev(kobj);              \
 143         struct hard_iface *hard_iface = hardif_get_by_netdev(net_dev);  \
 144         ssize_t length;                                                 \
 145                                                                         \
 146         if (!hard_iface)                                                \
 147                 return 0;                                               \
 148                                                                         \
 149         length = sprintf(buff, "%i\n", atomic_read(&hard_iface->_name));\
 150                                                                         \
 151         hardif_free_ref(hard_iface);                                    \
 152         return length;                                                  \
 153 }
 154
 155 /* Use this, if you are going to set [name] in hard_iface to an
 156  * unsigned integer value*/
 157 #define BAT_ATTR_HIF_UINT(_name, _mode, _min, _max, _post_func)         \
 158         static BAT_ATTR_HIF_STORE_UINT(_name, _min, _max, _post_func)   \
 159         static BAT_ATTR_HIF_SHOW_UINT(_name)                            \
 160         static BAT_ATTR(_name, _mode, show_##_name, store_##_name)
 161
 162
 163 static int store_bool_attr(char *buff, size_t count,
 164                            struct net_device *net_dev,
 165                            const char *attr_name, atomic_t *attr)
 166 {
 167         int enabled = -1;
 168
 169         if (buff[count - 1] == '\n')
 170                 buff[count - 1] = '\0';
 171
 172         if ((strncmp(buff, "1", 2) == 0) ||
 173             (strncmp(buff, "enable", 7) == 0) ||
 174             (strncmp(buff, "enabled", 8) == 0))
 175                 enabled = 1;
 176
 177         if ((strncmp(buff, "0", 2) == 0) ||
 178             (strncmp(buff, "disable", 8) == 0) ||
 179             (strncmp(buff, "disabled", 9) == 0))
 180                 enabled = 0;
 181
 182         if (enabled < 0) {
 183                 bat_info(net_dev,
 184                          "%s: Invalid parameter received: %s\n",
 185                          attr_name, buff);
 186                 return -EINVAL;
 187         }
 188
 189         if (atomic_read(attr) == enabled)
 190                 return count;
 191
 192         bat_info(net_dev, "%s: Changing from: %s to: %s\n", attr_name,
 193                  atomic_read(attr) == 1 ? "enabled" : "disabled",
 194                  enabled == 1 ? "enabled" : "disabled");
 195
 196         atomic_set(attr, (unsigned int)enabled);
 197         return count;
 198 }
 199
 200 static inline ssize_t __store_bool_attr(char *buff, size_t count,
 201                         void (*post_func)(struct net_device *),
 202                         struct attribute *attr,
 203                         atomic_t *attr_store, struct net_device *net_dev)
 204 {
 205         int ret;
 206
 207         ret = store_bool_attr(buff, count, net_dev, attr->name, attr_store);
 208         if (post_func && ret)
 209                 post_func(net_dev);
 210
 211         return ret;
 212 }
 213
 214 static int store_uint_attr(const char *buff, size_t count,
 215                            struct net_device *net_dev, const char *attr_name,
 216                            unsigned int min, unsigned int max, atomic_t *attr)
 217 {
 218         unsigned long uint_val;
 219         int ret;
 220
 221         ret = kstrtoul(buff, 10, &uint_val);
 222         if (ret) {
 223                 bat_info(net_dev,
 224                          "%s: Invalid parameter received: %s\n",
 225                          attr_name, buff);
 226                 return -EINVAL;
 227         }
 228
 229         if (uint_val < min) {
 230                 bat_info(net_dev, "%s: Value is too small: %lu min: %u\n",
 231                          attr_name, uint_val, min);
 232                 return -EINVAL;
 233         }
 234
 235         if (uint_val > max) {
 236                 bat_info(net_dev, "%s: Value is too big: %lu max: %u\n",
 237                          attr_name, uint_val, max);
 238                 return -EINVAL;
 239         }
 240
 241         if (atomic_read(attr) == uint_val)
 242                 return count;
 243
 244         bat_info(net_dev, "%s: Changing from: %i to: %lu\n",
 245                  attr_name, atomic_read(attr), uint_val);
 246
 247         atomic_set(attr, uint_val);
 248         return count;
 249 }
 250
 251 static inline ssize_t __store_uint_attr(const char *buff, size_t count,
 252                         int min, int max,
 253                         void (*post_func)(struct net_device *),
 254                         const struct attribute *attr,
 255                         atomic_t *attr_store, struct net_device *net_dev)
 256 {
 257         int ret;
 258
 259         ret = store_uint_attr(buff, count, net_dev, attr->name,
 260                               min, max, attr_store);
 261         if (post_func && ret)
 262                 post_func(net_dev);
 263
 264         return ret;
 265 }
 266
 267 static ssize_t show_vis_mode(struct kobject *kobj, struct attribute *attr,
 268                              char *buff)
 269 {
 270         struct bat_priv *bat_priv = kobj_to_batpriv(kobj);
 271         int vis_mode = atomic_read(&bat_priv->vis_mode);
 272
 273         return sprintf(buff, "%s\n",
 274                        vis_mode == VIS_TYPE_CLIENT_UPDATE ?
 275                                                         "client" : "server");
 276 }
 277
 278 static ssize_t store_vis_mode(struct kobject *kobj, struct attribute *attr,
 279                               char *buff, size_t count)
 280 {
 281         struct net_device *net_dev = kobj_to_netdev(kobj);
 282         struct bat_priv *bat_priv = netdev_priv(net_dev);
 283         unsigned long val;
 284         int ret, vis_mode_tmp = -1;
 285
 286         ret = kstrtoul(buff, 10, &val);
 287
 288         if (((count == 2) && (!ret) && (val == VIS_TYPE_CLIENT_UPDATE)) ||
 289             (strncmp(buff, "client", 6) == 0) ||
 290             (strncmp(buff, "off", 3) == 0))
 291                 vis_mode_tmp = VIS_TYPE_CLIENT_UPDATE;
 292
 293         if (((count == 2) && (!ret) && (val == VIS_TYPE_SERVER_SYNC)) ||
 294             (strncmp(buff, "server", 6) == 0))
 295                 vis_mode_tmp = VIS_TYPE_SERVER_SYNC;
 296
 297         if (vis_mode_tmp < 0) {
 298                 if (buff[count - 1] == '\n')
 299                         buff[count - 1] = '\0';
 300
 301                 bat_info(net_dev,
 302                          "Invalid parameter for 'vis mode' setting received: %s\n",
 303                          buff);
 304                 return -EINVAL;
 305         }
 306
 307         if (atomic_read(&bat_priv->vis_mode) == vis_mode_tmp)
 308                 return count;
 309
 310         bat_info(net_dev, "Changing vis mode from: %s to: %s\n",
 311                  atomic_read(&bat_priv->vis_mode) == VIS_TYPE_CLIENT_UPDATE ?
 312                  "client" : "server", vis_mode_tmp == VIS_TYPE_CLIENT_UPDATE ?
 313                  "client" : "server");
 314
 315         atomic_set(&bat_priv->vis_mode, (unsigned int)vis_mode_tmp);
 316         return count;
 317 }
 318
 319 static ssize_t show_bat_algo(struct kobject *kobj, struct attribute *attr,
 320                             char *buff)
 321 {
 322         struct bat_priv *bat_priv = kobj_to_batpriv(kobj);
 323         return sprintf(buff, "%s\n", bat_priv->bat_algo_ops->name);
 324 }
 325
 326 static void post_gw_deselect(struct net_device *net_dev)
 327 {
 328         struct bat_priv *bat_priv = netdev_priv(net_dev);
 329         gw_deselect(bat_priv);
 330 }
 331
 332 static ssize_t show_gw_mode(struct kobject *kobj, struct attribute *attr,
 333                             char *buff)
 334 {
 335         struct bat_priv *bat_priv = kobj_to_batpriv(kobj);
 336         int bytes_written;
 337
 338         switch (atomic_read(&bat_priv->gw_mode)) {
 339         case GW_MODE_CLIENT:
 340                 bytes_written = sprintf(buff, "%s\n", GW_MODE_CLIENT_NAME);
 341                 break;
 342         case GW_MODE_SERVER:
 343                 bytes_written = sprintf(buff, "%s\n", GW_MODE_SERVER_NAME);
 344                 break;
 345         default:
 346                 bytes_written = sprintf(buff, "%s\n", GW_MODE_OFF_NAME);
 347                 break;
 348         }
 349
 350         return bytes_written;
 351 }
 352
 353 static ssize_t store_gw_mode(struct kobject *kobj, struct attribute *attr,
 354                              char *buff, size_t count)
 355 {
 356         struct net_device *net_dev = kobj_to_netdev(kobj);
 357         struct bat_priv *bat_priv = netdev_priv(net_dev);
 358         char *curr_gw_mode_str;
 359         int gw_mode_tmp = -1;
 360
 361         if (buff[count - 1] == '\n')
 362                 buff[count - 1] = '\0';
 363
 364         if (strncmp(buff, GW_MODE_OFF_NAME, strlen(GW_MODE_OFF_NAME)) == 0)
 365                 gw_mode_tmp = GW_MODE_OFF;
 366
 367         if (strncmp(buff, GW_MODE_CLIENT_NAME,
 368                     strlen(GW_MODE_CLIENT_NAME)) == 0)
 369                 gw_mode_tmp = GW_MODE_CLIENT;
 370
 371         if (strncmp(buff, GW_MODE_SERVER_NAME,
 372                     strlen(GW_MODE_SERVER_NAME)) == 0)
 373                 gw_mode_tmp = GW_MODE_SERVER;
 374
 375         if (gw_mode_tmp < 0) {
 376                 bat_info(net_dev,
 377                          "Invalid parameter for 'gw mode' setting received: %s\n",
 378                          buff);
 379                 return -EINVAL;
 380         }
 381
 382         if (atomic_read(&bat_priv->gw_mode) == gw_mode_tmp)
 383                 return count;
 384
 385         switch (atomic_read(&bat_priv->gw_mode)) {
 386         case GW_MODE_CLIENT:
 387                 curr_gw_mode_str = GW_MODE_CLIENT_NAME;
 388                 break;
 389         case GW_MODE_SERVER:
 390                 curr_gw_mode_str = GW_MODE_SERVER_NAME;
 391                 break;
 392         default:
 393                 curr_gw_mode_str = GW_MODE_OFF_NAME;
 394                 break;
 395         }
 396
 397         bat_info(net_dev, "Changing gw mode from: %s to: %s\n",
 398                  curr_gw_mode_str, buff);
 399
 400         gw_deselect(bat_priv);
 401         atomic_set(&bat_priv->gw_mode, (unsigned int)gw_mode_tmp);
 402         return count;
 403 }
 404
 405 static ssize_t show_gw_bwidth(struct kobject *kobj, struct attribute *attr,
 406                               char *buff)
 407 {
 408         struct bat_priv *bat_priv = kobj_to_batpriv(kobj);
 409         int down, up;
 410         int gw_bandwidth = atomic_read(&bat_priv->gw_bandwidth);
 411
 412         gw_bandwidth_to_kbit(gw_bandwidth, &down, &up);
 413         return sprintf(buff, "%i%s/%i%s\n",
 414                        (down > 2048 ? down / 1024 : down),
 415                        (down > 2048 ? "MBit" : "KBit"),
 416                        (up > 2048 ? up / 1024 : up),
 417                        (up > 2048 ? "MBit" : "KBit"));
 418 }
 419
 420 static ssize_t store_gw_bwidth(struct kobject *kobj, struct attribute *attr,
 421                                char *buff, size_t count)
 422 {
 423         struct net_device *net_dev = kobj_to_netdev(kobj);
 424
 425         if (buff[count - 1] == '\n')
 426                 buff[count - 1] = '\0';
 427
 428         return gw_bandwidth_set(net_dev, buff, count);
 429 }
 430
 431 BAT_ATTR_SIF_BOOL(aggregated_ogms, S_IRUGO | S_IWUSR, NULL);
 432 BAT_ATTR_SIF_BOOL(bonding, S_IRUGO | S_IWUSR, NULL);
 433 #ifdef CONFIG_BATMAN_ADV_BLA
 434 BAT_ATTR_SIF_BOOL(bridge_loop_avoidance, S_IRUGO | S_IWUSR, NULL);
 435 #endif
 436 BAT_ATTR_SIF_BOOL(fragmentation, S_IRUGO | S_IWUSR, update_min_mtu);
 437 BAT_ATTR_SIF_BOOL(ap_isolation, S_IRUGO | S_IWUSR, NULL);
 438 static BAT_ATTR(vis_mode, S_IRUGO | S_IWUSR, show_vis_mode, store_vis_mode);
 439 static BAT_ATTR(routing_algo, S_IRUGO, show_bat_algo, NULL);
 440 static BAT_ATTR(gw_mode, S_IRUGO | S_IWUSR, show_gw_mode, store_gw_mode);
 441 BAT_ATTR_SIF_UINT(orig_interval, S_IRUGO | S_IWUSR, 2 * JITTER, INT_MAX, NULL);
 442 BAT_ATTR_SIF_UINT(hop_penalty, S_IRUGO | S_IWUSR, 0, TQ_MAX_VALUE, NULL);
 443 BAT_ATTR_SIF_UINT(gw_sel_class, S_IRUGO | S_IWUSR, 1, TQ_MAX_VALUE,
 444                   post_gw_deselect);
 445 static BAT_ATTR(gw_bandwidth, S_IRUGO | S_IWUSR, show_gw_bwidth,
 446                 store_gw_bwidth);
 447 #ifdef CONFIG_BATMAN_ADV_DEBUG
 448 BAT_ATTR_SIF_UINT(log_level, S_IRUGO | S_IWUSR, 0, DBG_ALL, NULL);
 449 #endif
 450
 451 static struct bat_attribute *mesh_attrs[] = {
 452         &bat_attr_aggregated_ogms,
 453         &bat_attr_bonding,
 454 #ifdef CONFIG_BATMAN_ADV_BLA
 455         &bat_attr_bridge_loop_avoidance,
 456 #endif
 457         &bat_attr_fragmentation,
 458         &bat_attr_ap_isolation,
 459         &bat_attr_vis_mode,
 460         &bat_attr_routing_algo,
 461         &bat_attr_gw_mode,
 462         &bat_attr_orig_interval,
 463         &bat_attr_hop_penalty,
 464         &bat_attr_gw_sel_class,
 465         &bat_attr_gw_bandwidth,
 466 #ifdef CONFIG_BATMAN_ADV_DEBUG
 467         &bat_attr_log_level,
 468 #endif
 469         NULL,
 470 };
 471
 472 int sysfs_add_meshif(struct net_device *dev)
 473 {
 474         struct kobject *batif_kobject = &dev->dev.kobj;
 475         struct bat_priv *bat_priv = netdev_priv(dev);
 476         struct bat_attribute **bat_attr;
 477         int err;
 478
 479         bat_priv->mesh_obj = kobject_create_and_add(SYSFS_IF_MESH_SUBDIR,
 480                                                     batif_kobject);
 481         if (!bat_priv->mesh_obj) {
 482                 bat_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
 483                         SYSFS_IF_MESH_SUBDIR);
 484                 goto out;
 485         }
 486
 487         for (bat_attr = mesh_attrs; *bat_attr; ++bat_attr) {
 488                 err = sysfs_create_file(bat_priv->mesh_obj,
 489                                         &((*bat_attr)->attr));
 490                 if (err) {
 491                         bat_err(dev, "Can't add sysfs file: %s/%s/%s\n",
 492                                 dev->name, SYSFS_IF_MESH_SUBDIR,
 493                                 ((*bat_attr)->attr).name);
 494                         goto rem_attr;
 495                 }
 496         }
 497
 498         return 0;
 499
 500 rem_attr:
 501         for (bat_attr = mesh_attrs; *bat_attr; ++bat_attr)
 502                 sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
 503
 504         kobject_put(bat_priv->mesh_obj);
 505         bat_priv->mesh_obj = NULL;
 506 out:
 507         return -ENOMEM;
 508 }
 509
 510 void sysfs_del_meshif(struct net_device *dev)
 511 {
 512         struct bat_priv *bat_priv = netdev_priv(dev);
 513         struct bat_attribute **bat_attr;
 514
 515         for (bat_attr = mesh_attrs; *bat_attr; ++bat_attr)
 516                 sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
 517
 518         kobject_put(bat_priv->mesh_obj);
 519         bat_priv->mesh_obj = NULL;
 520 }
 521
 522 static ssize_t show_mesh_iface(struct kobject *kobj, struct attribute *attr,
 523                                char *buff)
 524 {
 525         struct net_device *net_dev = kobj_to_netdev(kobj);
 526         struct hard_iface *hard_iface = hardif_get_by_netdev(net_dev);
 527         ssize_t length;
 528
 529         if (!hard_iface)
 530                 return 0;
 531
 532         length = sprintf(buff, "%s\n", hard_iface->if_status == IF_NOT_IN_USE ?
 533                          "none" : hard_iface->soft_iface->name);
 534
 535         hardif_free_ref(hard_iface);
 536
 537         return length;
 538 }
 539
 540 static ssize_t store_mesh_iface(struct kobject *kobj, struct attribute *attr,
 541                                 char *buff, size_t count)
 542 {
 543         struct net_device *net_dev = kobj_to_netdev(kobj);
 544         struct hard_iface *hard_iface = hardif_get_by_netdev(net_dev);
 545         int status_tmp = -1;
 546         int ret = count;
 547
 548         if (!hard_iface)
 549                 return count;
 550
 551         if (buff[count - 1] == '\n')
 552                 buff[count - 1] = '\0';
 553
 554         if (strlen(buff) >= IFNAMSIZ) {
 555                 pr_err("Invalid parameter for 'mesh_iface' setting received: interface name too long '%s'\n",
 556                        buff);
 557                 hardif_free_ref(hard_iface);
 558                 return -EINVAL;
 559         }
 560
 561         if (strncmp(buff, "none", 4) == 0)
 562                 status_tmp = IF_NOT_IN_USE;
 563         else
 564                 status_tmp = IF_I_WANT_YOU;
 565
 566         if (hard_iface->if_status == status_tmp)
 567                 goto out;
 568
 569         if ((hard_iface->soft_iface) &&
 570             (strncmp(hard_iface->soft_iface->name, buff, IFNAMSIZ) == 0))
 571                 goto out;
 572
 573         if (!rtnl_trylock()) {
 574                 ret = -ERESTARTSYS;
 575                 goto out;
 576         }
 577
 578         if (status_tmp == IF_NOT_IN_USE) {
 579                 hardif_disable_interface(hard_iface);
 580                 goto unlock;
 581         }
 582
 583         /* if the interface already is in use */
 584         if (hard_iface->if_status != IF_NOT_IN_USE)
 585                 hardif_disable_interface(hard_iface);
 586
 587         ret = hardif_enable_interface(hard_iface, buff);
 588
 589 unlock:
 590         rtnl_unlock();
 591 out:
 592         hardif_free_ref(hard_iface);
 593         return ret;
 594 }
 595
 596 static ssize_t show_iface_status(struct kobject *kobj, struct attribute *attr,
 597                                  char *buff)
 598 {
 599         struct net_device *net_dev = kobj_to_netdev(kobj);
 600         struct hard_iface *hard_iface = hardif_get_by_netdev(net_dev);
 601         ssize_t length;
 602
 603         if (!hard_iface)
 604                 return 0;
 605
 606         switch (hard_iface->if_status) {
 607         case IF_TO_BE_REMOVED:
 608                 length = sprintf(buff, "disabling\n");
 609                 break;
 610         case IF_INACTIVE:
 611                 length = sprintf(buff, "inactive\n");
 612                 break;
 613         case IF_ACTIVE:
 614                 length = sprintf(buff, "active\n");
 615                 break;
 616         case IF_TO_BE_ACTIVATED:
 617                 length = sprintf(buff, "enabling\n");
 618                 break;
 619         case IF_NOT_IN_USE:
 620         default:
 621                 length = sprintf(buff, "not in use\n");
 622                 break;
 623         }
 624
 625         hardif_free_ref(hard_iface);
 626
 627         return length;
 628 }
 629
 630 static BAT_ATTR(mesh_iface, S_IRUGO | S_IWUSR,
 631                 show_mesh_iface, store_mesh_iface);
 632 static BAT_ATTR(iface_status, S_IRUGO, show_iface_status, NULL);
 633
 634 static struct bat_attribute *batman_attrs[] = {
 635         &bat_attr_mesh_iface,
 636         &bat_attr_iface_status,
 637         NULL,
 638 };
 639
 640 int sysfs_add_hardif(struct kobject **hardif_obj, struct net_device *dev)
 641 {
 642         struct kobject *hardif_kobject = &dev->dev.kobj;
 643         struct bat_attribute **bat_attr;
 644         int err;
 645
 646         *hardif_obj = kobject_create_and_add(SYSFS_IF_BAT_SUBDIR,
 647                                                     hardif_kobject);
 648
 649         if (!*hardif_obj) {
 650                 bat_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
 651                         SYSFS_IF_BAT_SUBDIR);
 652                 goto out;
 653         }
 654
 655         for (bat_attr = batman_attrs; *bat_attr; ++bat_attr) {
 656                 err = sysfs_create_file(*hardif_obj, &((*bat_attr)->attr));
 657                 if (err) {
 658                         bat_err(dev, "Can't add sysfs file: %s/%s/%s\n",
 659                                 dev->name, SYSFS_IF_BAT_SUBDIR,
 660                                 ((*bat_attr)->attr).name);
 661                         goto rem_attr;
 662                 }
 663         }
 664
 665         return 0;
 666
 667 rem_attr:
 668         for (bat_attr = batman_attrs; *bat_attr; ++bat_attr)
 669                 sysfs_remove_file(*hardif_obj, &((*bat_attr)->attr));
 670 out:
 671         return -ENOMEM;
 672 }
 673
 674 void sysfs_del_hardif(struct kobject **hardif_obj)
 675 {
 676         kobject_put(*hardif_obj);
 677         *hardif_obj = NULL;
 678 }
 679
 680 int throw_uevent(struct bat_priv *bat_priv, enum uev_type type,
 681                  enum uev_action action, const char *data)
 682 {
 683         int ret = -ENOMEM;
 684         struct hard_iface *primary_if = NULL;
 685         struct kobject *bat_kobj;
 686         char *uevent_env[4] = { NULL, NULL, NULL, NULL };
 687
 688         primary_if = primary_if_get_selected(bat_priv);
 689         if (!primary_if)
 690                 goto out;
 691
 692         bat_kobj = &primary_if->soft_iface->dev.kobj;
 693
 694         uevent_env[0] = kmalloc(strlen(UEV_TYPE_VAR) +
 695                                 strlen(uev_type_str[type]) + 1,
 696                                 GFP_ATOMIC);
 697         if (!uevent_env[0])
 698                 goto out;
 699
 700         sprintf(uevent_env[0], "%s%s", UEV_TYPE_VAR, uev_type_str[type]);
 701
 702         uevent_env[1] = kmalloc(strlen(UEV_ACTION_VAR) +
 703                                 strlen(uev_action_str[action]) + 1,
 704                                 GFP_ATOMIC);
 705         if (!uevent_env[1])
 706                 goto out;
 707
 708         sprintf(uevent_env[1], "%s%s", UEV_ACTION_VAR, uev_action_str[action]);
 709
 710         /* If the event is DEL, ignore the data field */
 711         if (action != UEV_DEL) {
 712                 uevent_env[2] = kmalloc(strlen(UEV_DATA_VAR) +
 713                                         strlen(data) + 1, GFP_ATOMIC);
 714                 if (!uevent_env[2])
 715                         goto out;
 716
 717                 sprintf(uevent_env[2], "%s%s", UEV_DATA_VAR, data);
 718         }
 719
 720         ret = kobject_uevent_env(bat_kobj, KOBJ_CHANGE, uevent_env);
 721 out:
 722         kfree(uevent_env[0]);
 723         kfree(uevent_env[1]);
 724         kfree(uevent_env[2]);
 725
 726         if (primary_if)
 727                 hardif_free_ref(primary_if);
 728
 729         if (ret)
 730                 bat_dbg(DBG_BATMAN, bat_priv,
 731                         "Impossible to send uevent for (%s,%s,%s) event (err: %d)\n",
 732                         uev_type_str[type], uev_action_str[action],
 733                         (action == UEV_DEL ? "NULL" : data), ret);
 734         return ret;
 735 }