net/batman-adv/bat_sysfs.c

   1 /*
   2  * Copyright (C) 2010-2011 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 = strict_strtoul(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 = strict_strtoul(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: "
 259                          "%s\n", 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 void post_gw_deselect(struct net_device *net_dev)
 276 {
 277         struct bat_priv *bat_priv = netdev_priv(net_dev);
 278         gw_deselect(bat_priv);
 279 }
 280
 281 static ssize_t show_gw_mode(struct kobject *kobj, struct attribute *attr,
 282                             char *buff)
 283 {
 284         struct bat_priv *bat_priv = kobj_to_batpriv(kobj);
 285         int bytes_written;
 286
 287         switch (atomic_read(&bat_priv->gw_mode)) {
 288         case GW_MODE_CLIENT:
 289                 bytes_written = sprintf(buff, "%s\n", GW_MODE_CLIENT_NAME);
 290                 break;
 291         case GW_MODE_SERVER:
 292                 bytes_written = sprintf(buff, "%s\n", GW_MODE_SERVER_NAME);
 293                 break;
 294         default:
 295                 bytes_written = sprintf(buff, "%s\n", GW_MODE_OFF_NAME);
 296                 break;
 297         }
 298
 299         return bytes_written;
 300 }
 301
 302 static ssize_t store_gw_mode(struct kobject *kobj, struct attribute *attr,
 303                              char *buff, size_t count)
 304 {
 305         struct net_device *net_dev = kobj_to_netdev(kobj);
 306         struct bat_priv *bat_priv = netdev_priv(net_dev);
 307         char *curr_gw_mode_str;
 308         int gw_mode_tmp = -1;
 309
 310         if (buff[count - 1] == '\n')
 311                 buff[count - 1] = '\0';
 312
 313         if (strncmp(buff, GW_MODE_OFF_NAME, strlen(GW_MODE_OFF_NAME)) == 0)
 314                 gw_mode_tmp = GW_MODE_OFF;
 315
 316         if (strncmp(buff, GW_MODE_CLIENT_NAME,
 317                    strlen(GW_MODE_CLIENT_NAME)) == 0)
 318                 gw_mode_tmp = GW_MODE_CLIENT;
 319
 320         if (strncmp(buff, GW_MODE_SERVER_NAME,
 321                    strlen(GW_MODE_SERVER_NAME)) == 0)
 322                 gw_mode_tmp = GW_MODE_SERVER;
 323
 324         if (gw_mode_tmp < 0) {
 325                 bat_info(net_dev,
 326                          "Invalid parameter for 'gw mode' setting received: "
 327                          "%s\n", buff);
 328                 return -EINVAL;
 329         }
 330
 331         if (atomic_read(&bat_priv->gw_mode) == gw_mode_tmp)
 332                 return count;
 333
 334         switch (atomic_read(&bat_priv->gw_mode)) {
 335         case GW_MODE_CLIENT:
 336                 curr_gw_mode_str = GW_MODE_CLIENT_NAME;
 337                 break;
 338         case GW_MODE_SERVER:
 339                 curr_gw_mode_str = GW_MODE_SERVER_NAME;
 340                 break;
 341         default:
 342                 curr_gw_mode_str = GW_MODE_OFF_NAME;
 343                 break;
 344         }
 345
 346         bat_info(net_dev, "Changing gw mode from: %s to: %s\n",
 347                  curr_gw_mode_str, buff);
 348
 349         gw_deselect(bat_priv);
 350         atomic_set(&bat_priv->gw_mode, (unsigned)gw_mode_tmp);
 351         return count;
 352 }
 353
 354 static ssize_t show_gw_bwidth(struct kobject *kobj, struct attribute *attr,
 355                               char *buff)
 356 {
 357         struct bat_priv *bat_priv = kobj_to_batpriv(kobj);
 358         int down, up;
 359         int gw_bandwidth = atomic_read(&bat_priv->gw_bandwidth);
 360
 361         gw_bandwidth_to_kbit(gw_bandwidth, &down, &up);
 362         return sprintf(buff, "%i%s/%i%s\n",
 363                        (down > 2048 ? down / 1024 : down),
 364                        (down > 2048 ? "MBit" : "KBit"),
 365                        (up > 2048 ? up / 1024 : up),
 366                        (up > 2048 ? "MBit" : "KBit"));
 367 }
 368
 369 static ssize_t store_gw_bwidth(struct kobject *kobj, struct attribute *attr,
 370                                char *buff, size_t count)
 371 {
 372         struct net_device *net_dev = kobj_to_netdev(kobj);
 373
 374         if (buff[count - 1] == '\n')
 375                 buff[count - 1] = '\0';
 376
 377         return gw_bandwidth_set(net_dev, buff, count);
 378 }
 379
 380 BAT_ATTR_BOOL(aggregated_ogms, S_IRUGO | S_IWUSR, NULL);
 381 BAT_ATTR_BOOL(bonding, S_IRUGO | S_IWUSR, NULL);
 382 BAT_ATTR_BOOL(fragmentation, S_IRUGO | S_IWUSR, update_min_mtu);
 383 static BAT_ATTR(vis_mode, S_IRUGO | S_IWUSR, show_vis_mode, store_vis_mode);
 384 static BAT_ATTR(gw_mode, S_IRUGO | S_IWUSR, show_gw_mode, store_gw_mode);
 385 BAT_ATTR_UINT(orig_interval, S_IRUGO | S_IWUSR, 2 * JITTER, INT_MAX, NULL);
 386 BAT_ATTR_UINT(hop_penalty, S_IRUGO | S_IWUSR, 0, TQ_MAX_VALUE, NULL);
 387 BAT_ATTR_UINT(gw_sel_class, S_IRUGO | S_IWUSR, 1, TQ_MAX_VALUE,
 388               post_gw_deselect);
 389 static BAT_ATTR(gw_bandwidth, S_IRUGO | S_IWUSR, show_gw_bwidth,
 390                 store_gw_bwidth);
 391 #ifdef CONFIG_BATMAN_ADV_DEBUG
 392 BAT_ATTR_UINT(log_level, S_IRUGO | S_IWUSR, 0, 7, NULL);
 393 #endif
 394
 395 static struct bat_attribute *mesh_attrs[] = {
 396         &bat_attr_aggregated_ogms,
 397         &bat_attr_bonding,
 398         &bat_attr_fragmentation,
 399         &bat_attr_vis_mode,
 400         &bat_attr_gw_mode,
 401         &bat_attr_orig_interval,
 402         &bat_attr_hop_penalty,
 403         &bat_attr_gw_sel_class,
 404         &bat_attr_gw_bandwidth,
 405 #ifdef CONFIG_BATMAN_ADV_DEBUG
 406         &bat_attr_log_level,
 407 #endif
 408         NULL,
 409 };
 410
 411 int sysfs_add_meshif(struct net_device *dev)
 412 {
 413         struct kobject *batif_kobject = &dev->dev.kobj;
 414         struct bat_priv *bat_priv = netdev_priv(dev);
 415         struct bat_attribute **bat_attr;
 416         int err;
 417
 418         bat_priv->mesh_obj = kobject_create_and_add(SYSFS_IF_MESH_SUBDIR,
 419                                                     batif_kobject);
 420         if (!bat_priv->mesh_obj) {
 421                 bat_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
 422                         SYSFS_IF_MESH_SUBDIR);
 423                 goto out;
 424         }
 425
 426         for (bat_attr = mesh_attrs; *bat_attr; ++bat_attr) {
 427                 err = sysfs_create_file(bat_priv->mesh_obj,
 428                                         &((*bat_attr)->attr));
 429                 if (err) {
 430                         bat_err(dev, "Can't add sysfs file: %s/%s/%s\n",
 431                                 dev->name, SYSFS_IF_MESH_SUBDIR,
 432                                 ((*bat_attr)->attr).name);
 433                         goto rem_attr;
 434                 }
 435         }
 436
 437         return 0;
 438
 439 rem_attr:
 440         for (bat_attr = mesh_attrs; *bat_attr; ++bat_attr)
 441                 sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
 442
 443         kobject_put(bat_priv->mesh_obj);
 444         bat_priv->mesh_obj = NULL;
 445 out:
 446         return -ENOMEM;
 447 }
 448
 449 void sysfs_del_meshif(struct net_device *dev)
 450 {
 451         struct bat_priv *bat_priv = netdev_priv(dev);
 452         struct bat_attribute **bat_attr;
 453
 454         for (bat_attr = mesh_attrs; *bat_attr; ++bat_attr)
 455                 sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
 456
 457         kobject_put(bat_priv->mesh_obj);
 458         bat_priv->mesh_obj = NULL;
 459 }
 460
 461 static ssize_t show_mesh_iface(struct kobject *kobj, struct attribute *attr,
 462                                char *buff)
 463 {
 464         struct net_device *net_dev = kobj_to_netdev(kobj);
 465         struct hard_iface *hard_iface = hardif_get_by_netdev(net_dev);
 466         ssize_t length;
 467
 468         if (!hard_iface)
 469                 return 0;
 470
 471         length = sprintf(buff, "%s\n", hard_iface->if_status == IF_NOT_IN_USE ?
 472                          "none" : hard_iface->soft_iface->name);
 473
 474         hardif_free_ref(hard_iface);
 475
 476         return length;
 477 }
 478
 479 static ssize_t store_mesh_iface(struct kobject *kobj, struct attribute *attr,
 480                                 char *buff, size_t count)
 481 {
 482         struct net_device *net_dev = kobj_to_netdev(kobj);
 483         struct hard_iface *hard_iface = hardif_get_by_netdev(net_dev);
 484         int status_tmp = -1;
 485         int ret = count;
 486
 487         if (!hard_iface)
 488                 return count;
 489
 490         if (buff[count - 1] == '\n')
 491                 buff[count - 1] = '\0';
 492
 493         if (strlen(buff) >= IFNAMSIZ) {
 494                 pr_err("Invalid parameter for 'mesh_iface' setting received: "
 495                        "interface name too long '%s'\n", buff);
 496                 hardif_free_ref(hard_iface);
 497                 return -EINVAL;
 498         }
 499
 500         if (strncmp(buff, "none", 4) == 0)
 501                 status_tmp = IF_NOT_IN_USE;
 502         else
 503                 status_tmp = IF_I_WANT_YOU;
 504
 505         if (hard_iface->if_status == status_tmp)
 506                 goto out;
 507
 508         if ((hard_iface->soft_iface) &&
 509             (strncmp(hard_iface->soft_iface->name, buff, IFNAMSIZ) == 0))
 510                 goto out;
 511
 512         if (!rtnl_trylock()) {
 513                 ret = -ERESTARTSYS;
 514                 goto out;
 515         }
 516
 517         if (status_tmp == IF_NOT_IN_USE) {
 518                 hardif_disable_interface(hard_iface);
 519                 goto unlock;
 520         }
 521
 522         /* if the interface already is in use */
 523         if (hard_iface->if_status != IF_NOT_IN_USE)
 524                 hardif_disable_interface(hard_iface);
 525
 526         ret = hardif_enable_interface(hard_iface, buff);
 527
 528 unlock:
 529         rtnl_unlock();
 530 out:
 531         hardif_free_ref(hard_iface);
 532         return ret;
 533 }
 534
 535 static ssize_t show_iface_status(struct kobject *kobj, struct attribute *attr,
 536                                  char *buff)
 537 {
 538         struct net_device *net_dev = kobj_to_netdev(kobj);
 539         struct hard_iface *hard_iface = hardif_get_by_netdev(net_dev);
 540         ssize_t length;
 541
 542         if (!hard_iface)
 543                 return 0;
 544
 545         switch (hard_iface->if_status) {
 546         case IF_TO_BE_REMOVED:
 547                 length = sprintf(buff, "disabling\n");
 548                 break;
 549         case IF_INACTIVE:
 550                 length = sprintf(buff, "inactive\n");
 551                 break;
 552         case IF_ACTIVE:
 553                 length = sprintf(buff, "active\n");
 554                 break;
 555         case IF_TO_BE_ACTIVATED:
 556                 length = sprintf(buff, "enabling\n");
 557                 break;
 558         case IF_NOT_IN_USE:
 559         default:
 560                 length = sprintf(buff, "not in use\n");
 561                 break;
 562         }
 563
 564         hardif_free_ref(hard_iface);
 565
 566         return length;
 567 }
 568
 569 static BAT_ATTR(mesh_iface, S_IRUGO | S_IWUSR,
 570                 show_mesh_iface, store_mesh_iface);
 571 static BAT_ATTR(iface_status, S_IRUGO, show_iface_status, NULL);
 572
 573 static struct bat_attribute *batman_attrs[] = {
 574         &bat_attr_mesh_iface,
 575         &bat_attr_iface_status,
 576         NULL,
 577 };
 578
 579 int sysfs_add_hardif(struct kobject **hardif_obj, struct net_device *dev)
 580 {
 581         struct kobject *hardif_kobject = &dev->dev.kobj;
 582         struct bat_attribute **bat_attr;
 583         int err;
 584
 585         *hardif_obj = kobject_create_and_add(SYSFS_IF_BAT_SUBDIR,
 586                                                     hardif_kobject);
 587
 588         if (!*hardif_obj) {
 589                 bat_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
 590                         SYSFS_IF_BAT_SUBDIR);
 591                 goto out;
 592         }
 593
 594         for (bat_attr = batman_attrs; *bat_attr; ++bat_attr) {
 595                 err = sysfs_create_file(*hardif_obj, &((*bat_attr)->attr));
 596                 if (err) {
 597                         bat_err(dev, "Can't add sysfs file: %s/%s/%s\n",
 598                                 dev->name, SYSFS_IF_BAT_SUBDIR,
 599                                 ((*bat_attr)->attr).name);
 600                         goto rem_attr;
 601                 }
 602         }
 603
 604         return 0;
 605
 606 rem_attr:
 607         for (bat_attr = batman_attrs; *bat_attr; ++bat_attr)
 608                 sysfs_remove_file(*hardif_obj, &((*bat_attr)->attr));
 609 out:
 610         return -ENOMEM;
 611 }
 612
 613 void sysfs_del_hardif(struct kobject **hardif_obj)
 614 {
 615         kobject_put(*hardif_obj);
 616         *hardif_obj = NULL;
 617 }
 618
 619 int throw_uevent(struct bat_priv *bat_priv, enum uev_type type,
 620                  enum uev_action action, const char *data)
 621 {
 622         int ret = -1;
 623         struct hard_iface *primary_if = NULL;
 624         struct kobject *bat_kobj;
 625         char *uevent_env[4] = { NULL, NULL, NULL, NULL };
 626
 627         primary_if = primary_if_get_selected(bat_priv);
 628         if (!primary_if)
 629                 goto out;
 630
 631         bat_kobj = &primary_if->soft_iface->dev.kobj;
 632
 633         uevent_env[0] = kmalloc(strlen(UEV_TYPE_VAR) +
 634                                 strlen(uev_type_str[type]) + 1,
 635                                 GFP_ATOMIC);
 636         if (!uevent_env[0])
 637                 goto out;
 638
 639         sprintf(uevent_env[0], "%s%s", UEV_TYPE_VAR, uev_type_str[type]);
 640
 641         uevent_env[1] = kmalloc(strlen(UEV_ACTION_VAR) +
 642                                 strlen(uev_action_str[action]) + 1,
 643                                 GFP_ATOMIC);
 644         if (!uevent_env[1])
 645                 goto out;
 646
 647         sprintf(uevent_env[1], "%s%s", UEV_ACTION_VAR, uev_action_str[action]);
 648
 649         /* If the event is DEL, ignore the data field */
 650         if (action != UEV_DEL) {
 651                 uevent_env[2] = kmalloc(strlen(UEV_DATA_VAR) +
 652                                         strlen(data) + 1, GFP_ATOMIC);
 653                 if (!uevent_env[2])
 654                         goto out;
 655
 656                 sprintf(uevent_env[2], "%s%s", UEV_DATA_VAR, data);
 657         }
 658
 659         ret = kobject_uevent_env(bat_kobj, KOBJ_CHANGE, uevent_env);
 660 out:
 661         kfree(uevent_env[0]);
 662         kfree(uevent_env[1]);
 663         kfree(uevent_env[2]);
 664
 665         if (primary_if)
 666                 hardif_free_ref(primary_if);
 667
 668         if (ret)
 669                 bat_dbg(DBG_BATMAN, bat_priv, "Impossible to send "
 670                         "uevent for (%s,%s,%s) event (err: %d)\n",
 671                         uev_type_str[type], uev_action_str[action],
 672                         (action == UEV_DEL ? "NULL" : data), ret);
 673         return ret;
 674 }