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_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_SHOW_BOOL(_name)                                       \
  77 ssize_t show_##_name(struct kobject *kobj, struct attribute *attr,      \
  78                             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 bat_priv on or off */
  87 #define BAT_ATTR_BOOL(_name, _mode, _post_func)                         \
  88         static BAT_ATTR_STORE_BOOL(_name, _post_func)                   \
  89         static BAT_ATTR_SHOW_BOOL(_name)                                \
  90         static BAT_ATTR(_name, _mode, show_##_name, store_##_name)
  91
  92
  93 #define BAT_ATTR_STORE_UINT(_name, _min, _max, _post_func)              \
  94 ssize_t store_##_name(struct kobject *kobj, struct attribute *attr,     \
  95                              char *buff, size_t count)                  \
  96 {                                                                       \
  97         struct net_device *net_dev = kobj_to_netdev(kobj);              \
  98         struct bat_priv *bat_priv = netdev_priv(net_dev);               \
  99         return __store_uint_attr(buff, count, _min, _max, _post_func,   \
 100                                  attr, &bat_priv->_name, net_dev);      \
 101 }
 102
 103 #define BAT_ATTR_SHOW_UINT(_name)                                       \
 104 ssize_t show_##_name(struct kobject *kobj, struct attribute *attr,      \
 105                             char *buff)                                 \
 106 {                                                                       \
 107         struct bat_priv *bat_priv = kobj_to_batpriv(kobj);              \
 108         return sprintf(buff, "%i\n", atomic_read(&bat_priv->_name));    \
 109 }                                                                       \
 110
 111 /* Use this, if you are going to set [name] in bat_priv to unsigned integer
 112  * values only */
 113 #define BAT_ATTR_UINT(_name, _mode, _min, _max, _post_func)             \
 114         static BAT_ATTR_STORE_UINT(_name, _min, _max, _post_func)       \
 115         static BAT_ATTR_SHOW_UINT(_name)                                \
 116         static BAT_ATTR(_name, _mode, show_##_name, store_##_name)
 117
 118
 119 static int store_bool_attr(char *buff, size_t count,
 120                            struct net_device *net_dev,
 121                            const char *attr_name, atomic_t *attr)
 122 {
 123         int enabled = -1;
 124
 125         if (buff[count - 1] == '\n')
 126                 buff[count - 1] = '\0';
 127
 128         if ((strncmp(buff, "1", 2) == 0) ||
 129             (strncmp(buff, "enable", 7) == 0) ||
 130             (strncmp(buff, "enabled", 8) == 0))
 131                 enabled = 1;
 132
 133         if ((strncmp(buff, "0", 2) == 0) ||
 134             (strncmp(buff, "disable", 8) == 0) ||
 135             (strncmp(buff, "disabled", 9) == 0))
 136                 enabled = 0;
 137
 138         if (enabled < 0) {
 139                 bat_info(net_dev,
 140                          "%s: Invalid parameter received: %s\n",
 141                          attr_name, buff);
 142                 return -EINVAL;
 143         }
 144
 145         if (atomic_read(attr) == enabled)
 146                 return count;
 147
 148         bat_info(net_dev, "%s: Changing from: %s to: %s\n", attr_name,
 149                  atomic_read(attr) == 1 ? "enabled" : "disabled",
 150                  enabled == 1 ? "enabled" : "disabled");
 151
 152         atomic_set(attr, (unsigned)enabled);
 153         return count;
 154 }
 155
 156 static inline ssize_t __store_bool_attr(char *buff, size_t count,
 157                         void (*post_func)(struct net_device *),
 158                         struct attribute *attr,
 159                         atomic_t *attr_store, struct net_device *net_dev)
 160 {
 161         int ret;
 162
 163         ret = store_bool_attr(buff, count, net_dev, attr->name, attr_store);
 164         if (post_func && ret)
 165                 post_func(net_dev);
 166
 167         return ret;
 168 }
 169
 170 static int store_uint_attr(const char *buff, size_t count,
 171                            struct net_device *net_dev, const char *attr_name,
 172                            unsigned int min, unsigned int max, atomic_t *attr)
 173 {
 174         unsigned long uint_val;
 175         int ret;
 176
 177         ret = kstrtoul(buff, 10, &uint_val);
 178         if (ret) {
 179                 bat_info(net_dev,
 180                          "%s: Invalid parameter received: %s\n",
 181                          attr_name, buff);
 182                 return -EINVAL;
 183         }
 184
 185         if (uint_val < min) {
 186                 bat_info(net_dev, "%s: Value is too small: %lu min: %u\n",
 187                          attr_name, uint_val, min);
 188                 return -EINVAL;
 189         }
 190
 191         if (uint_val > max) {
 192                 bat_info(net_dev, "%s: Value is too big: %lu max: %u\n",
 193                          attr_name, uint_val, max);
 194                 return -EINVAL;
 195         }
 196
 197         if (atomic_read(attr) == uint_val)
 198                 return count;
 199
 200         bat_info(net_dev, "%s: Changing from: %i to: %lu\n",
 201                  attr_name, atomic_read(attr), uint_val);
 202
 203         atomic_set(attr, uint_val);
 204         return count;
 205 }
 206
 207 static inline ssize_t __store_uint_attr(const char *buff, size_t count,
 208                         int min, int max,
 209                         void (*post_func)(struct net_device *),
 210                         const struct attribute *attr,
 211                         atomic_t *attr_store, struct net_device *net_dev)
 212 {
 213         int ret;
 214
 215         ret = store_uint_attr(buff, count, net_dev, attr->name,
 216                               min, max, attr_store);
 217         if (post_func && ret)
 218                 post_func(net_dev);
 219
 220         return ret;
 221 }
 222
 223 static ssize_t show_vis_mode(struct kobject *kobj, struct attribute *attr,
 224                              char *buff)
 225 {
 226         struct bat_priv *bat_priv = kobj_to_batpriv(kobj);
 227         int vis_mode = atomic_read(&bat_priv->vis_mode);
 228
 229         return sprintf(buff, "%s\n",
 230                        vis_mode == VIS_TYPE_CLIENT_UPDATE ?
 231                                                         "client" : "server");
 232 }
 233
 234 static ssize_t store_vis_mode(struct kobject *kobj, struct attribute *attr,
 235                               char *buff, size_t count)
 236 {
 237         struct net_device *net_dev = kobj_to_netdev(kobj);
 238         struct bat_priv *bat_priv = netdev_priv(net_dev);
 239         unsigned long val;
 240         int ret, vis_mode_tmp = -1;
 241
 242         ret = kstrtoul(buff, 10, &val);
 243
 244         if (((count == 2) && (!ret) && (val == VIS_TYPE_CLIENT_UPDATE)) ||
 245             (strncmp(buff, "client", 6) == 0) ||
 246             (strncmp(buff, "off", 3) == 0))
 247                 vis_mode_tmp = VIS_TYPE_CLIENT_UPDATE;
 248
 249         if (((count == 2) && (!ret) && (val == VIS_TYPE_SERVER_SYNC)) ||
 250             (strncmp(buff, "server", 6) == 0))
 251                 vis_mode_tmp = VIS_TYPE_SERVER_SYNC;
 252
 253         if (vis_mode_tmp < 0) {
 254                 if (buff[count - 1] == '\n')
 255                         buff[count - 1] = '\0';
 256
 257                 bat_info(net_dev,
 258                          "Invalid parameter for 'vis mode' setting received: %s\n",
 259                          buff);
 260                 return -EINVAL;
 261         }
 262
 263         if (atomic_read(&bat_priv->vis_mode) == vis_mode_tmp)
 264                 return count;
 265
 266         bat_info(net_dev, "Changing vis mode from: %s to: %s\n",
 267                  atomic_read(&bat_priv->vis_mode) == VIS_TYPE_CLIENT_UPDATE ?
 268                  "client" : "server", vis_mode_tmp == VIS_TYPE_CLIENT_UPDATE ?
 269                  "client" : "server");
 270
 271         atomic_set(&bat_priv->vis_mode, (unsigned)vis_mode_tmp);
 272         return count;
 273 }
 274
 275 static ssize_t show_bat_algo(struct kobject *kobj, struct attribute *attr,
 276                             char *buff)
 277 {
 278         struct bat_priv *bat_priv = kobj_to_batpriv(kobj);
 279         return sprintf(buff, "%s\n", bat_priv->bat_algo_ops->name);
 280 }
 281
 282 static void post_gw_deselect(struct net_device *net_dev)
 283 {
 284         struct bat_priv *bat_priv = netdev_priv(net_dev);
 285         gw_deselect(bat_priv);
 286 }
 287
 288 static ssize_t show_gw_mode(struct kobject *kobj, struct attribute *attr,
 289                             char *buff)
 290 {
 291         struct bat_priv *bat_priv = kobj_to_batpriv(kobj);
 292         int bytes_written;
 293
 294         switch (atomic_read(&bat_priv->gw_mode)) {
 295         case GW_MODE_CLIENT:
 296                 bytes_written = sprintf(buff, "%s\n", GW_MODE_CLIENT_NAME);
 297                 break;
 298         case GW_MODE_SERVER:
 299                 bytes_written = sprintf(buff, "%s\n", GW_MODE_SERVER_NAME);
 300                 break;
 301         default:
 302                 bytes_written = sprintf(buff, "%s\n", GW_MODE_OFF_NAME);
 303                 break;
 304         }
 305
 306         return bytes_written;
 307 }
 308
 309 static ssize_t store_gw_mode(struct kobject *kobj, struct attribute *attr,
 310                              char *buff, size_t count)
 311 {
 312         struct net_device *net_dev = kobj_to_netdev(kobj);
 313         struct bat_priv *bat_priv = netdev_priv(net_dev);
 314         char *curr_gw_mode_str;
 315         int gw_mode_tmp = -1;
 316
 317         if (buff[count - 1] == '\n')
 318                 buff[count - 1] = '\0';
 319
 320         if (strncmp(buff, GW_MODE_OFF_NAME, strlen(GW_MODE_OFF_NAME)) == 0)
 321                 gw_mode_tmp = GW_MODE_OFF;
 322
 323         if (strncmp(buff, GW_MODE_CLIENT_NAME,
 324                     strlen(GW_MODE_CLIENT_NAME)) == 0)
 325                 gw_mode_tmp = GW_MODE_CLIENT;
 326
 327         if (strncmp(buff, GW_MODE_SERVER_NAME,
 328                     strlen(GW_MODE_SERVER_NAME)) == 0)
 329                 gw_mode_tmp = GW_MODE_SERVER;
 330
 331         if (gw_mode_tmp < 0) {
 332                 bat_info(net_dev,
 333                          "Invalid parameter for 'gw mode' setting received: %s\n",
 334                          buff);
 335                 return -EINVAL;
 336         }
 337
 338         if (atomic_read(&bat_priv->gw_mode) == gw_mode_tmp)
 339                 return count;
 340
 341         switch (atomic_read(&bat_priv->gw_mode)) {
 342         case GW_MODE_CLIENT:
 343                 curr_gw_mode_str = GW_MODE_CLIENT_NAME;
 344                 break;
 345         case GW_MODE_SERVER:
 346                 curr_gw_mode_str = GW_MODE_SERVER_NAME;
 347                 break;
 348         default:
 349                 curr_gw_mode_str = GW_MODE_OFF_NAME;
 350                 break;
 351         }
 352
 353         bat_info(net_dev, "Changing gw mode from: %s to: %s\n",
 354                  curr_gw_mode_str, buff);
 355
 356         gw_deselect(bat_priv);
 357         atomic_set(&bat_priv->gw_mode, (unsigned)gw_mode_tmp);
 358         return count;
 359 }
 360
 361 static ssize_t show_gw_bwidth(struct kobject *kobj, struct attribute *attr,
 362                               char *buff)
 363 {
 364         struct bat_priv *bat_priv = kobj_to_batpriv(kobj);
 365         int down, up;
 366         int gw_bandwidth = atomic_read(&bat_priv->gw_bandwidth);
 367
 368         gw_bandwidth_to_kbit(gw_bandwidth, &down, &up);
 369         return sprintf(buff, "%i%s/%i%s\n",
 370                        (down > 2048 ? down / 1024 : down),
 371                        (down > 2048 ? "MBit" : "KBit"),
 372                        (up > 2048 ? up / 1024 : up),
 373                        (up > 2048 ? "MBit" : "KBit"));
 374 }
 375
 376 static ssize_t store_gw_bwidth(struct kobject *kobj, struct attribute *attr,
 377                                char *buff, size_t count)
 378 {
 379         struct net_device *net_dev = kobj_to_netdev(kobj);
 380
 381         if (buff[count - 1] == '\n')
 382                 buff[count - 1] = '\0';
 383
 384         return gw_bandwidth_set(net_dev, buff, count);
 385 }
 386
 387 BAT_ATTR_BOOL(aggregated_ogms, S_IRUGO | S_IWUSR, NULL);
 388 BAT_ATTR_BOOL(bonding, S_IRUGO | S_IWUSR, NULL);
 389 BAT_ATTR_BOOL(bridge_loop_avoidance, S_IRUGO | S_IWUSR, NULL);
 390 BAT_ATTR_BOOL(fragmentation, S_IRUGO | S_IWUSR, update_min_mtu);
 391 BAT_ATTR_BOOL(ap_isolation, S_IRUGO | S_IWUSR, NULL);
 392 static BAT_ATTR(vis_mode, S_IRUGO | S_IWUSR, show_vis_mode, store_vis_mode);
 393 static BAT_ATTR(routing_algo, S_IRUGO, show_bat_algo, NULL);
 394 static BAT_ATTR(gw_mode, S_IRUGO | S_IWUSR, show_gw_mode, store_gw_mode);
 395 BAT_ATTR_UINT(orig_interval, S_IRUGO | S_IWUSR, 2 * JITTER, INT_MAX, NULL);
 396 BAT_ATTR_UINT(hop_penalty, S_IRUGO | S_IWUSR, 0, TQ_MAX_VALUE, NULL);
 397 BAT_ATTR_UINT(gw_sel_class, S_IRUGO | S_IWUSR, 1, TQ_MAX_VALUE,
 398               post_gw_deselect);
 399 static BAT_ATTR(gw_bandwidth, S_IRUGO | S_IWUSR, show_gw_bwidth,
 400                 store_gw_bwidth);
 401 #ifdef CONFIG_BATMAN_ADV_DEBUG
 402 BAT_ATTR_UINT(log_level, S_IRUGO | S_IWUSR, 0, 15, NULL);
 403 #endif
 404
 405 static struct bat_attribute *mesh_attrs[] = {
 406         &bat_attr_aggregated_ogms,
 407         &bat_attr_bonding,
 408         &bat_attr_bridge_loop_avoidance,
 409         &bat_attr_fragmentation,
 410         &bat_attr_ap_isolation,
 411         &bat_attr_vis_mode,
 412         &bat_attr_routing_algo,
 413         &bat_attr_gw_mode,
 414         &bat_attr_orig_interval,
 415         &bat_attr_hop_penalty,
 416         &bat_attr_gw_sel_class,
 417         &bat_attr_gw_bandwidth,
 418 #ifdef CONFIG_BATMAN_ADV_DEBUG
 419         &bat_attr_log_level,
 420 #endif
 421         NULL,
 422 };
 423
 424 int sysfs_add_meshif(struct net_device *dev)
 425 {
 426         struct kobject *batif_kobject = &dev->dev.kobj;
 427         struct bat_priv *bat_priv = netdev_priv(dev);
 428         struct bat_attribute **bat_attr;
 429         int err;
 430
 431         bat_priv->mesh_obj = kobject_create_and_add(SYSFS_IF_MESH_SUBDIR,
 432                                                     batif_kobject);
 433         if (!bat_priv->mesh_obj) {
 434                 bat_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
 435                         SYSFS_IF_MESH_SUBDIR);
 436                 goto out;
 437         }
 438
 439         for (bat_attr = mesh_attrs; *bat_attr; ++bat_attr) {
 440                 err = sysfs_create_file(bat_priv->mesh_obj,
 441                                         &((*bat_attr)->attr));
 442                 if (err) {
 443                         bat_err(dev, "Can't add sysfs file: %s/%s/%s\n",
 444                                 dev->name, SYSFS_IF_MESH_SUBDIR,
 445                                 ((*bat_attr)->attr).name);
 446                         goto rem_attr;
 447                 }
 448         }
 449
 450         return 0;
 451
 452 rem_attr:
 453         for (bat_attr = mesh_attrs; *bat_attr; ++bat_attr)
 454                 sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
 455
 456         kobject_put(bat_priv->mesh_obj);
 457         bat_priv->mesh_obj = NULL;
 458 out:
 459         return -ENOMEM;
 460 }
 461
 462 void sysfs_del_meshif(struct net_device *dev)
 463 {
 464         struct bat_priv *bat_priv = netdev_priv(dev);
 465         struct bat_attribute **bat_attr;
 466
 467         for (bat_attr = mesh_attrs; *bat_attr; ++bat_attr)
 468                 sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
 469
 470         kobject_put(bat_priv->mesh_obj);
 471         bat_priv->mesh_obj = NULL;
 472 }
 473
 474 static ssize_t show_mesh_iface(struct kobject *kobj, struct attribute *attr,
 475                                char *buff)
 476 {
 477         struct net_device *net_dev = kobj_to_netdev(kobj);
 478         struct hard_iface *hard_iface = hardif_get_by_netdev(net_dev);
 479         ssize_t length;
 480
 481         if (!hard_iface)
 482                 return 0;
 483
 484         length = sprintf(buff, "%s\n", hard_iface->if_status == IF_NOT_IN_USE ?
 485                          "none" : hard_iface->soft_iface->name);
 486
 487         hardif_free_ref(hard_iface);
 488
 489         return length;
 490 }
 491
 492 static ssize_t store_mesh_iface(struct kobject *kobj, struct attribute *attr,
 493                                 char *buff, size_t count)
 494 {
 495         struct net_device *net_dev = kobj_to_netdev(kobj);
 496         struct hard_iface *hard_iface = hardif_get_by_netdev(net_dev);
 497         int status_tmp = -1;
 498         int ret = count;
 499
 500         if (!hard_iface)
 501                 return count;
 502
 503         if (buff[count - 1] == '\n')
 504                 buff[count - 1] = '\0';
 505
 506         if (strlen(buff) >= IFNAMSIZ) {
 507                 pr_err("Invalid parameter for 'mesh_iface' setting received: interface name too long '%s'\n",
 508                        buff);
 509                 hardif_free_ref(hard_iface);
 510                 return -EINVAL;
 511         }
 512
 513         if (strncmp(buff, "none", 4) == 0)
 514                 status_tmp = IF_NOT_IN_USE;
 515         else
 516                 status_tmp = IF_I_WANT_YOU;
 517
 518         if (hard_iface->if_status == status_tmp)
 519                 goto out;
 520
 521         if ((hard_iface->soft_iface) &&
 522             (strncmp(hard_iface->soft_iface->name, buff, IFNAMSIZ) == 0))
 523                 goto out;
 524
 525         if (!rtnl_trylock()) {
 526                 ret = -ERESTARTSYS;
 527                 goto out;
 528         }
 529
 530         if (status_tmp == IF_NOT_IN_USE) {
 531                 hardif_disable_interface(hard_iface);
 532                 goto unlock;
 533         }
 534
 535         /* if the interface already is in use */
 536         if (hard_iface->if_status != IF_NOT_IN_USE)
 537                 hardif_disable_interface(hard_iface);
 538
 539         ret = hardif_enable_interface(hard_iface, buff);
 540
 541 unlock:
 542         rtnl_unlock();
 543 out:
 544         hardif_free_ref(hard_iface);
 545         return ret;
 546 }
 547
 548 static ssize_t show_iface_status(struct kobject *kobj, struct attribute *attr,
 549                                  char *buff)
 550 {
 551         struct net_device *net_dev = kobj_to_netdev(kobj);
 552         struct hard_iface *hard_iface = hardif_get_by_netdev(net_dev);
 553         ssize_t length;
 554
 555         if (!hard_iface)
 556                 return 0;
 557
 558         switch (hard_iface->if_status) {
 559         case IF_TO_BE_REMOVED:
 560                 length = sprintf(buff, "disabling\n");
 561                 break;
 562         case IF_INACTIVE:
 563                 length = sprintf(buff, "inactive\n");
 564                 break;
 565         case IF_ACTIVE:
 566                 length = sprintf(buff, "active\n");
 567                 break;
 568         case IF_TO_BE_ACTIVATED:
 569                 length = sprintf(buff, "enabling\n");
 570                 break;
 571         case IF_NOT_IN_USE:
 572         default:
 573                 length = sprintf(buff, "not in use\n");
 574                 break;
 575         }
 576
 577         hardif_free_ref(hard_iface);
 578
 579         return length;
 580 }
 581
 582 static BAT_ATTR(mesh_iface, S_IRUGO | S_IWUSR,
 583                 show_mesh_iface, store_mesh_iface);
 584 static BAT_ATTR(iface_status, S_IRUGO, show_iface_status, NULL);
 585
 586 static struct bat_attribute *batman_attrs[] = {
 587         &bat_attr_mesh_iface,
 588         &bat_attr_iface_status,
 589         NULL,
 590 };
 591
 592 int sysfs_add_hardif(struct kobject **hardif_obj, struct net_device *dev)
 593 {
 594         struct kobject *hardif_kobject = &dev->dev.kobj;
 595         struct bat_attribute **bat_attr;
 596         int err;
 597
 598         *hardif_obj = kobject_create_and_add(SYSFS_IF_BAT_SUBDIR,
 599                                                     hardif_kobject);
 600
 601         if (!*hardif_obj) {
 602                 bat_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
 603                         SYSFS_IF_BAT_SUBDIR);
 604                 goto out;
 605         }
 606
 607         for (bat_attr = batman_attrs; *bat_attr; ++bat_attr) {
 608                 err = sysfs_create_file(*hardif_obj, &((*bat_attr)->attr));
 609                 if (err) {
 610                         bat_err(dev, "Can't add sysfs file: %s/%s/%s\n",
 611                                 dev->name, SYSFS_IF_BAT_SUBDIR,
 612                                 ((*bat_attr)->attr).name);
 613                         goto rem_attr;
 614                 }
 615         }
 616
 617         return 0;
 618
 619 rem_attr:
 620         for (bat_attr = batman_attrs; *bat_attr; ++bat_attr)
 621                 sysfs_remove_file(*hardif_obj, &((*bat_attr)->attr));
 622 out:
 623         return -ENOMEM;
 624 }
 625
 626 void sysfs_del_hardif(struct kobject **hardif_obj)
 627 {
 628         kobject_put(*hardif_obj);
 629         *hardif_obj = NULL;
 630 }
 631
 632 int throw_uevent(struct bat_priv *bat_priv, enum uev_type type,
 633                  enum uev_action action, const char *data)
 634 {
 635         int ret = -1;
 636         struct hard_iface *primary_if = NULL;
 637         struct kobject *bat_kobj;
 638         char *uevent_env[4] = { NULL, NULL, NULL, NULL };
 639
 640         primary_if = primary_if_get_selected(bat_priv);
 641         if (!primary_if)
 642                 goto out;
 643
 644         bat_kobj = &primary_if->soft_iface->dev.kobj;
 645
 646         uevent_env[0] = kmalloc(strlen(UEV_TYPE_VAR) +
 647                                 strlen(uev_type_str[type]) + 1,
 648                                 GFP_ATOMIC);
 649         if (!uevent_env[0])
 650                 goto out;
 651
 652         sprintf(uevent_env[0], "%s%s", UEV_TYPE_VAR, uev_type_str[type]);
 653
 654         uevent_env[1] = kmalloc(strlen(UEV_ACTION_VAR) +
 655                                 strlen(uev_action_str[action]) + 1,
 656                                 GFP_ATOMIC);
 657         if (!uevent_env[1])
 658                 goto out;
 659
 660         sprintf(uevent_env[1], "%s%s", UEV_ACTION_VAR, uev_action_str[action]);
 661
 662         /* If the event is DEL, ignore the data field */
 663         if (action != UEV_DEL) {
 664                 uevent_env[2] = kmalloc(strlen(UEV_DATA_VAR) +
 665                                         strlen(data) + 1, GFP_ATOMIC);
 666                 if (!uevent_env[2])
 667                         goto out;
 668
 669                 sprintf(uevent_env[2], "%s%s", UEV_DATA_VAR, data);
 670         }
 671
 672         ret = kobject_uevent_env(bat_kobj, KOBJ_CHANGE, uevent_env);
 673 out:
 674         kfree(uevent_env[0]);
 675         kfree(uevent_env[1]);
 676         kfree(uevent_env[2]);
 677
 678         if (primary_if)
 679                 hardif_free_ref(primary_if);
 680
 681         if (ret)
 682                 bat_dbg(DBG_BATMAN, bat_priv,
 683                         "Impossible to send uevent for (%s,%s,%s) event (err: %d)\n",
 684                         uev_type_str[type], uev_action_str[action],
 685                         (action == UEV_DEL ? "NULL" : data), ret);
 686         return ret;
 687 }