net/batman-adv/sysfs.c

   1 /* Copyright (C) 2010-2013 B.A.T.M.A.N. contributors:
   2  *
   3  * Marek Lindner
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of version 2 of the GNU General Public
   7  * License as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  12  * General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  17  * 02110-1301, USA
  18  */
  19
  20 #include "main.h"
  21 #include "sysfs.h"
  22 #include "translation-table.h"
  23 #include "distributed-arp-table.h"
  24 #include "network-coding.h"
  25 #include "originator.h"
  26 #include "hard-interface.h"
  27 #include "gateway_common.h"
  28 #include "gateway_client.h"
  29
  30 static struct net_device *batadv_kobj_to_netdev(struct kobject *obj)
  31 {
  32         struct device *dev = container_of(obj->parent, struct device, kobj);
  33         return to_net_dev(dev);
  34 }
  35
  36 static struct batadv_priv *batadv_kobj_to_batpriv(struct kobject *obj)
  37 {
  38         struct net_device *net_dev = batadv_kobj_to_netdev(obj);
  39         return netdev_priv(net_dev);
  40 }
  41
  42 #define BATADV_UEV_TYPE_VAR     "BATTYPE="
  43 #define BATADV_UEV_ACTION_VAR   "BATACTION="
  44 #define BATADV_UEV_DATA_VAR     "BATDATA="
  45
  46 static char *batadv_uev_action_str[] = {
  47         "add",
  48         "del",
  49         "change"
  50 };
  51
  52 static char *batadv_uev_type_str[] = {
  53         "gw"
  54 };
  55
  56 /* Use this, if you have customized show and store functions */
  57 #define BATADV_ATTR(_name, _mode, _show, _store)        \
  58 struct batadv_attribute batadv_attr_##_name = {         \
  59         .attr = {.name = __stringify(_name),            \
  60                  .mode = _mode },                       \
  61         .show   = _show,                                \
  62         .store  = _store,                               \
  63 };
  64
  65 #define BATADV_ATTR_SIF_STORE_BOOL(_name, _post_func)                   \
  66 ssize_t batadv_store_##_name(struct kobject *kobj,                      \
  67                              struct attribute *attr, char *buff,        \
  68                              size_t count)                              \
  69 {                                                                       \
  70         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);       \
  71         struct batadv_priv *bat_priv = netdev_priv(net_dev);            \
  72         return __batadv_store_bool_attr(buff, count, _post_func, attr,  \
  73                                         &bat_priv->_name, net_dev);     \
  74 }
  75
  76 #define BATADV_ATTR_SIF_SHOW_BOOL(_name)                                \
  77 ssize_t batadv_show_##_name(struct kobject *kobj,                       \
  78                             struct attribute *attr, char *buff)         \
  79 {                                                                       \
  80         struct batadv_priv *bat_priv = batadv_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  */
  89 #define BATADV_ATTR_SIF_BOOL(_name, _mode, _post_func)                  \
  90         static BATADV_ATTR_SIF_STORE_BOOL(_name, _post_func)            \
  91         static BATADV_ATTR_SIF_SHOW_BOOL(_name)                         \
  92         static BATADV_ATTR(_name, _mode, batadv_show_##_name,           \
  93                            batadv_store_##_name)
  94
  95
  96 #define BATADV_ATTR_SIF_STORE_UINT(_name, _min, _max, _post_func)       \
  97 ssize_t batadv_store_##_name(struct kobject *kobj,                      \
  98                              struct attribute *attr, char *buff,        \
  99                              size_t count)                              \
 100 {                                                                       \
 101         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);       \
 102         struct batadv_priv *bat_priv = netdev_priv(net_dev);            \
 103         return __batadv_store_uint_attr(buff, count, _min, _max,        \
 104                                         _post_func, attr,               \
 105                                         &bat_priv->_name, net_dev);     \
 106 }
 107
 108 #define BATADV_ATTR_SIF_SHOW_UINT(_name)                                \
 109 ssize_t batadv_show_##_name(struct kobject *kobj,                       \
 110                             struct attribute *attr, char *buff)         \
 111 {                                                                       \
 112         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);    \
 113         return sprintf(buff, "%i\n", atomic_read(&bat_priv->_name));    \
 114 }                                                                       \
 115
 116 /* Use this, if you are going to set [name] in the soft-interface
 117  * (bat_priv) to an unsigned integer value
 118  */
 119 #define BATADV_ATTR_SIF_UINT(_name, _mode, _min, _max, _post_func)      \
 120         static BATADV_ATTR_SIF_STORE_UINT(_name, _min, _max, _post_func)\
 121         static BATADV_ATTR_SIF_SHOW_UINT(_name)                         \
 122         static BATADV_ATTR(_name, _mode, batadv_show_##_name,           \
 123                            batadv_store_##_name)
 124
 125
 126 static int batadv_store_bool_attr(char *buff, size_t count,
 127                                   struct net_device *net_dev,
 128                                   const char *attr_name, atomic_t *attr)
 129 {
 130         int enabled = -1;
 131
 132         if (buff[count - 1] == '\n')
 133                 buff[count - 1] = '\0';
 134
 135         if ((strncmp(buff, "1", 2) == 0) ||
 136             (strncmp(buff, "enable", 7) == 0) ||
 137             (strncmp(buff, "enabled", 8) == 0))
 138                 enabled = 1;
 139
 140         if ((strncmp(buff, "0", 2) == 0) ||
 141             (strncmp(buff, "disable", 8) == 0) ||
 142             (strncmp(buff, "disabled", 9) == 0))
 143                 enabled = 0;
 144
 145         if (enabled < 0) {
 146                 batadv_info(net_dev, "%s: Invalid parameter received: %s\n",
 147                             attr_name, buff);
 148                 return -EINVAL;
 149         }
 150
 151         if (atomic_read(attr) == enabled)
 152                 return count;
 153
 154         batadv_info(net_dev, "%s: Changing from: %s to: %s\n", attr_name,
 155                     atomic_read(attr) == 1 ? "enabled" : "disabled",
 156                     enabled == 1 ? "enabled" : "disabled");
 157
 158         atomic_set(attr, (unsigned int)enabled);
 159         return count;
 160 }
 161
 162 static inline ssize_t
 163 __batadv_store_bool_attr(char *buff, size_t count,
 164                          void (*post_func)(struct net_device *),
 165                          struct attribute *attr,
 166                          atomic_t *attr_store, struct net_device *net_dev)
 167 {
 168         int ret;
 169
 170         ret = batadv_store_bool_attr(buff, count, net_dev, attr->name,
 171                                      attr_store);
 172         if (post_func && ret)
 173                 post_func(net_dev);
 174
 175         return ret;
 176 }
 177
 178 static int batadv_store_uint_attr(const char *buff, size_t count,
 179                                   struct net_device *net_dev,
 180                                   const char *attr_name,
 181                                   unsigned int min, unsigned int max,
 182                                   atomic_t *attr)
 183 {
 184         unsigned long uint_val;
 185         int ret;
 186
 187         ret = kstrtoul(buff, 10, &uint_val);
 188         if (ret) {
 189                 batadv_info(net_dev, "%s: Invalid parameter received: %s\n",
 190                             attr_name, buff);
 191                 return -EINVAL;
 192         }
 193
 194         if (uint_val < min) {
 195                 batadv_info(net_dev, "%s: Value is too small: %lu min: %u\n",
 196                             attr_name, uint_val, min);
 197                 return -EINVAL;
 198         }
 199
 200         if (uint_val > max) {
 201                 batadv_info(net_dev, "%s: Value is too big: %lu max: %u\n",
 202                             attr_name, uint_val, max);
 203                 return -EINVAL;
 204         }
 205
 206         if (atomic_read(attr) == uint_val)
 207                 return count;
 208
 209         batadv_info(net_dev, "%s: Changing from: %i to: %lu\n",
 210                     attr_name, atomic_read(attr), uint_val);
 211
 212         atomic_set(attr, uint_val);
 213         return count;
 214 }
 215
 216 static inline ssize_t
 217 __batadv_store_uint_attr(const char *buff, size_t count,
 218                          int min, int max,
 219                          void (*post_func)(struct net_device *),
 220                          const struct attribute *attr,
 221                          atomic_t *attr_store, struct net_device *net_dev)
 222 {
 223         int ret;
 224
 225         ret = batadv_store_uint_attr(buff, count, net_dev, attr->name, min, max,
 226                                      attr_store);
 227         if (post_func && ret)
 228                 post_func(net_dev);
 229
 230         return ret;
 231 }
 232
 233 static ssize_t batadv_show_bat_algo(struct kobject *kobj,
 234                                     struct attribute *attr, char *buff)
 235 {
 236         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 237         return sprintf(buff, "%s\n", bat_priv->bat_algo_ops->name);
 238 }
 239
 240 static void batadv_post_gw_deselect(struct net_device *net_dev)
 241 {
 242         struct batadv_priv *bat_priv = netdev_priv(net_dev);
 243         batadv_gw_deselect(bat_priv);
 244 }
 245
 246 static ssize_t batadv_show_gw_mode(struct kobject *kobj, struct attribute *attr,
 247                                    char *buff)
 248 {
 249         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 250         int bytes_written;
 251
 252         switch (atomic_read(&bat_priv->gw_mode)) {
 253         case BATADV_GW_MODE_CLIENT:
 254                 bytes_written = sprintf(buff, "%s\n",
 255                                         BATADV_GW_MODE_CLIENT_NAME);
 256                 break;
 257         case BATADV_GW_MODE_SERVER:
 258                 bytes_written = sprintf(buff, "%s\n",
 259                                         BATADV_GW_MODE_SERVER_NAME);
 260                 break;
 261         default:
 262                 bytes_written = sprintf(buff, "%s\n",
 263                                         BATADV_GW_MODE_OFF_NAME);
 264                 break;
 265         }
 266
 267         return bytes_written;
 268 }
 269
 270 static ssize_t batadv_store_gw_mode(struct kobject *kobj,
 271                                     struct attribute *attr, char *buff,
 272                                     size_t count)
 273 {
 274         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 275         struct batadv_priv *bat_priv = netdev_priv(net_dev);
 276         char *curr_gw_mode_str;
 277         int gw_mode_tmp = -1;
 278
 279         if (buff[count - 1] == '\n')
 280                 buff[count - 1] = '\0';
 281
 282         if (strncmp(buff, BATADV_GW_MODE_OFF_NAME,
 283                     strlen(BATADV_GW_MODE_OFF_NAME)) == 0)
 284                 gw_mode_tmp = BATADV_GW_MODE_OFF;
 285
 286         if (strncmp(buff, BATADV_GW_MODE_CLIENT_NAME,
 287                     strlen(BATADV_GW_MODE_CLIENT_NAME)) == 0)
 288                 gw_mode_tmp = BATADV_GW_MODE_CLIENT;
 289
 290         if (strncmp(buff, BATADV_GW_MODE_SERVER_NAME,
 291                     strlen(BATADV_GW_MODE_SERVER_NAME)) == 0)
 292                 gw_mode_tmp = BATADV_GW_MODE_SERVER;
 293
 294         if (gw_mode_tmp < 0) {
 295                 batadv_info(net_dev,
 296                             "Invalid parameter for 'gw mode' setting received: %s\n",
 297                             buff);
 298                 return -EINVAL;
 299         }
 300
 301         if (atomic_read(&bat_priv->gw_mode) == gw_mode_tmp)
 302                 return count;
 303
 304         switch (atomic_read(&bat_priv->gw_mode)) {
 305         case BATADV_GW_MODE_CLIENT:
 306                 curr_gw_mode_str = BATADV_GW_MODE_CLIENT_NAME;
 307                 break;
 308         case BATADV_GW_MODE_SERVER:
 309                 curr_gw_mode_str = BATADV_GW_MODE_SERVER_NAME;
 310                 break;
 311         default:
 312                 curr_gw_mode_str = BATADV_GW_MODE_OFF_NAME;
 313                 break;
 314         }
 315
 316         batadv_info(net_dev, "Changing gw mode from: %s to: %s\n",
 317                     curr_gw_mode_str, buff);
 318
 319         batadv_gw_deselect(bat_priv);
 320         /* always call batadv_gw_check_client_stop() before changing the gateway
 321          * state
 322          */
 323         batadv_gw_check_client_stop(bat_priv);
 324         atomic_set(&bat_priv->gw_mode, (unsigned int)gw_mode_tmp);
 325         batadv_gw_tvlv_container_update(bat_priv);
 326         return count;
 327 }
 328
 329 static ssize_t batadv_show_gw_bwidth(struct kobject *kobj,
 330                                      struct attribute *attr, char *buff)
 331 {
 332         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 333         uint32_t down, up;
 334
 335         down = atomic_read(&bat_priv->gw.bandwidth_down);
 336         up = atomic_read(&bat_priv->gw.bandwidth_up);
 337
 338         return sprintf(buff, "%u.%u/%u.%u MBit\n", down / 10,
 339                        down % 10, up / 10, up % 10);
 340 }
 341
 342 static ssize_t batadv_store_gw_bwidth(struct kobject *kobj,
 343                                       struct attribute *attr, char *buff,
 344                                       size_t count)
 345 {
 346         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 347
 348         if (buff[count - 1] == '\n')
 349                 buff[count - 1] = '\0';
 350
 351         return batadv_gw_bandwidth_set(net_dev, buff, count);
 352 }
 353
 354 BATADV_ATTR_SIF_BOOL(aggregated_ogms, S_IRUGO | S_IWUSR, NULL);
 355 BATADV_ATTR_SIF_BOOL(bonding, S_IRUGO | S_IWUSR, NULL);
 356 #ifdef CONFIG_BATMAN_ADV_BLA
 357 BATADV_ATTR_SIF_BOOL(bridge_loop_avoidance, S_IRUGO | S_IWUSR, NULL);
 358 #endif
 359 #ifdef CONFIG_BATMAN_ADV_DAT
 360 BATADV_ATTR_SIF_BOOL(distributed_arp_table, S_IRUGO | S_IWUSR,
 361                      batadv_dat_status_update);
 362 #endif
 363 BATADV_ATTR_SIF_BOOL(fragmentation, S_IRUGO | S_IWUSR, batadv_update_min_mtu);
 364 BATADV_ATTR_SIF_BOOL(ap_isolation, S_IRUGO | S_IWUSR, NULL);
 365 static BATADV_ATTR(routing_algo, S_IRUGO, batadv_show_bat_algo, NULL);
 366 static BATADV_ATTR(gw_mode, S_IRUGO | S_IWUSR, batadv_show_gw_mode,
 367                    batadv_store_gw_mode);
 368 BATADV_ATTR_SIF_UINT(orig_interval, S_IRUGO | S_IWUSR, 2 * BATADV_JITTER,
 369                      INT_MAX, NULL);
 370 BATADV_ATTR_SIF_UINT(hop_penalty, S_IRUGO | S_IWUSR, 0, BATADV_TQ_MAX_VALUE,
 371                      NULL);
 372 BATADV_ATTR_SIF_UINT(gw_sel_class, S_IRUGO | S_IWUSR, 1, BATADV_TQ_MAX_VALUE,
 373                      batadv_post_gw_deselect);
 374 static BATADV_ATTR(gw_bandwidth, S_IRUGO | S_IWUSR, batadv_show_gw_bwidth,
 375                    batadv_store_gw_bwidth);
 376 #ifdef CONFIG_BATMAN_ADV_DEBUG
 377 BATADV_ATTR_SIF_UINT(log_level, S_IRUGO | S_IWUSR, 0, BATADV_DBG_ALL, NULL);
 378 #endif
 379 #ifdef CONFIG_BATMAN_ADV_NC
 380 BATADV_ATTR_SIF_BOOL(network_coding, S_IRUGO | S_IWUSR,
 381                      batadv_nc_status_update);
 382 #endif
 383
 384 static struct batadv_attribute *batadv_mesh_attrs[] = {
 385         &batadv_attr_aggregated_ogms,
 386         &batadv_attr_bonding,
 387 #ifdef CONFIG_BATMAN_ADV_BLA
 388         &batadv_attr_bridge_loop_avoidance,
 389 #endif
 390 #ifdef CONFIG_BATMAN_ADV_DAT
 391         &batadv_attr_distributed_arp_table,
 392 #endif
 393         &batadv_attr_fragmentation,
 394         &batadv_attr_ap_isolation,
 395         &batadv_attr_routing_algo,
 396         &batadv_attr_gw_mode,
 397         &batadv_attr_orig_interval,
 398         &batadv_attr_hop_penalty,
 399         &batadv_attr_gw_sel_class,
 400         &batadv_attr_gw_bandwidth,
 401 #ifdef CONFIG_BATMAN_ADV_DEBUG
 402         &batadv_attr_log_level,
 403 #endif
 404 #ifdef CONFIG_BATMAN_ADV_NC
 405         &batadv_attr_network_coding,
 406 #endif
 407         NULL,
 408 };
 409
 410 int batadv_sysfs_add_meshif(struct net_device *dev)
 411 {
 412         struct kobject *batif_kobject = &dev->dev.kobj;
 413         struct batadv_priv *bat_priv = netdev_priv(dev);
 414         struct batadv_attribute **bat_attr;
 415         int err;
 416
 417         bat_priv->mesh_obj = kobject_create_and_add(BATADV_SYSFS_IF_MESH_SUBDIR,
 418                                                     batif_kobject);
 419         if (!bat_priv->mesh_obj) {
 420                 batadv_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
 421                            BATADV_SYSFS_IF_MESH_SUBDIR);
 422                 goto out;
 423         }
 424
 425         for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr) {
 426                 err = sysfs_create_file(bat_priv->mesh_obj,
 427                                         &((*bat_attr)->attr));
 428                 if (err) {
 429                         batadv_err(dev, "Can't add sysfs file: %s/%s/%s\n",
 430                                    dev->name, BATADV_SYSFS_IF_MESH_SUBDIR,
 431                                    ((*bat_attr)->attr).name);
 432                         goto rem_attr;
 433                 }
 434         }
 435
 436         return 0;
 437
 438 rem_attr:
 439         for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr)
 440                 sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
 441
 442         kobject_put(bat_priv->mesh_obj);
 443         bat_priv->mesh_obj = NULL;
 444 out:
 445         return -ENOMEM;
 446 }
 447
 448 void batadv_sysfs_del_meshif(struct net_device *dev)
 449 {
 450         struct batadv_priv *bat_priv = netdev_priv(dev);
 451         struct batadv_attribute **bat_attr;
 452
 453         for (bat_attr = batadv_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 }
 459
 460 static ssize_t batadv_show_mesh_iface(struct kobject *kobj,
 461                                       struct attribute *attr, char *buff)
 462 {
 463         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 464         struct batadv_hard_iface *hard_iface;
 465         ssize_t length;
 466         const char *ifname;
 467
 468         hard_iface = batadv_hardif_get_by_netdev(net_dev);
 469         if (!hard_iface)
 470                 return 0;
 471
 472         if (hard_iface->if_status == BATADV_IF_NOT_IN_USE)
 473                 ifname =  "none";
 474         else
 475                 ifname = hard_iface->soft_iface->name;
 476
 477         length = sprintf(buff, "%s\n", ifname);
 478
 479         batadv_hardif_free_ref(hard_iface);
 480
 481         return length;
 482 }
 483
 484 static ssize_t batadv_store_mesh_iface(struct kobject *kobj,
 485                                        struct attribute *attr, char *buff,
 486                                        size_t count)
 487 {
 488         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 489         struct batadv_hard_iface *hard_iface;
 490         int status_tmp = -1;
 491         int ret = count;
 492
 493         hard_iface = batadv_hardif_get_by_netdev(net_dev);
 494         if (!hard_iface)
 495                 return count;
 496
 497         if (buff[count - 1] == '\n')
 498                 buff[count - 1] = '\0';
 499
 500         if (strlen(buff) >= IFNAMSIZ) {
 501                 pr_err("Invalid parameter for 'mesh_iface' setting received: interface name too long '%s'\n",
 502                        buff);
 503                 batadv_hardif_free_ref(hard_iface);
 504                 return -EINVAL;
 505         }
 506
 507         if (strncmp(buff, "none", 4) == 0)
 508                 status_tmp = BATADV_IF_NOT_IN_USE;
 509         else
 510                 status_tmp = BATADV_IF_I_WANT_YOU;
 511
 512         if (hard_iface->if_status == status_tmp)
 513                 goto out;
 514
 515         if ((hard_iface->soft_iface) &&
 516             (strncmp(hard_iface->soft_iface->name, buff, IFNAMSIZ) == 0))
 517                 goto out;
 518
 519         rtnl_lock();
 520
 521         if (status_tmp == BATADV_IF_NOT_IN_USE) {
 522                 batadv_hardif_disable_interface(hard_iface,
 523                                                 BATADV_IF_CLEANUP_AUTO);
 524                 goto unlock;
 525         }
 526
 527         /* if the interface already is in use */
 528         if (hard_iface->if_status != BATADV_IF_NOT_IN_USE)
 529                 batadv_hardif_disable_interface(hard_iface,
 530                                                 BATADV_IF_CLEANUP_AUTO);
 531
 532         ret = batadv_hardif_enable_interface(hard_iface, buff);
 533
 534 unlock:
 535         rtnl_unlock();
 536 out:
 537         batadv_hardif_free_ref(hard_iface);
 538         return ret;
 539 }
 540
 541 static ssize_t batadv_show_iface_status(struct kobject *kobj,
 542                                         struct attribute *attr, char *buff)
 543 {
 544         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 545         struct batadv_hard_iface *hard_iface;
 546         ssize_t length;
 547
 548         hard_iface = batadv_hardif_get_by_netdev(net_dev);
 549         if (!hard_iface)
 550                 return 0;
 551
 552         switch (hard_iface->if_status) {
 553         case BATADV_IF_TO_BE_REMOVED:
 554                 length = sprintf(buff, "disabling\n");
 555                 break;
 556         case BATADV_IF_INACTIVE:
 557                 length = sprintf(buff, "inactive\n");
 558                 break;
 559         case BATADV_IF_ACTIVE:
 560                 length = sprintf(buff, "active\n");
 561                 break;
 562         case BATADV_IF_TO_BE_ACTIVATED:
 563                 length = sprintf(buff, "enabling\n");
 564                 break;
 565         case BATADV_IF_NOT_IN_USE:
 566         default:
 567                 length = sprintf(buff, "not in use\n");
 568                 break;
 569         }
 570
 571         batadv_hardif_free_ref(hard_iface);
 572
 573         return length;
 574 }
 575
 576 static BATADV_ATTR(mesh_iface, S_IRUGO | S_IWUSR, batadv_show_mesh_iface,
 577                    batadv_store_mesh_iface);
 578 static BATADV_ATTR(iface_status, S_IRUGO, batadv_show_iface_status, NULL);
 579
 580 static struct batadv_attribute *batadv_batman_attrs[] = {
 581         &batadv_attr_mesh_iface,
 582         &batadv_attr_iface_status,
 583         NULL,
 584 };
 585
 586 int batadv_sysfs_add_hardif(struct kobject **hardif_obj, struct net_device *dev)
 587 {
 588         struct kobject *hardif_kobject = &dev->dev.kobj;
 589         struct batadv_attribute **bat_attr;
 590         int err;
 591
 592         *hardif_obj = kobject_create_and_add(BATADV_SYSFS_IF_BAT_SUBDIR,
 593                                              hardif_kobject);
 594
 595         if (!*hardif_obj) {
 596                 batadv_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
 597                            BATADV_SYSFS_IF_BAT_SUBDIR);
 598                 goto out;
 599         }
 600
 601         for (bat_attr = batadv_batman_attrs; *bat_attr; ++bat_attr) {
 602                 err = sysfs_create_file(*hardif_obj, &((*bat_attr)->attr));
 603                 if (err) {
 604                         batadv_err(dev, "Can't add sysfs file: %s/%s/%s\n",
 605                                    dev->name, BATADV_SYSFS_IF_BAT_SUBDIR,
 606                                    ((*bat_attr)->attr).name);
 607                         goto rem_attr;
 608                 }
 609         }
 610
 611         return 0;
 612
 613 rem_attr:
 614         for (bat_attr = batadv_batman_attrs; *bat_attr; ++bat_attr)
 615                 sysfs_remove_file(*hardif_obj, &((*bat_attr)->attr));
 616 out:
 617         return -ENOMEM;
 618 }
 619
 620 void batadv_sysfs_del_hardif(struct kobject **hardif_obj)
 621 {
 622         kobject_put(*hardif_obj);
 623         *hardif_obj = NULL;
 624 }
 625
 626 int batadv_throw_uevent(struct batadv_priv *bat_priv, enum batadv_uev_type type,
 627                         enum batadv_uev_action action, const char *data)
 628 {
 629         int ret = -ENOMEM;
 630         struct kobject *bat_kobj;
 631         char *uevent_env[4] = { NULL, NULL, NULL, NULL };
 632
 633         bat_kobj = &bat_priv->soft_iface->dev.kobj;
 634
 635         uevent_env[0] = kmalloc(strlen(BATADV_UEV_TYPE_VAR) +
 636                                 strlen(batadv_uev_type_str[type]) + 1,
 637                                 GFP_ATOMIC);
 638         if (!uevent_env[0])
 639                 goto out;
 640
 641         sprintf(uevent_env[0], "%s%s", BATADV_UEV_TYPE_VAR,
 642                 batadv_uev_type_str[type]);
 643
 644         uevent_env[1] = kmalloc(strlen(BATADV_UEV_ACTION_VAR) +
 645                                 strlen(batadv_uev_action_str[action]) + 1,
 646                                 GFP_ATOMIC);
 647         if (!uevent_env[1])
 648                 goto out;
 649
 650         sprintf(uevent_env[1], "%s%s", BATADV_UEV_ACTION_VAR,
 651                 batadv_uev_action_str[action]);
 652
 653         /* If the event is DEL, ignore the data field */
 654         if (action != BATADV_UEV_DEL) {
 655                 uevent_env[2] = kmalloc(strlen(BATADV_UEV_DATA_VAR) +
 656                                         strlen(data) + 1, GFP_ATOMIC);
 657                 if (!uevent_env[2])
 658                         goto out;
 659
 660                 sprintf(uevent_env[2], "%s%s", BATADV_UEV_DATA_VAR, data);
 661         }
 662
 663         ret = kobject_uevent_env(bat_kobj, KOBJ_CHANGE, uevent_env);
 664 out:
 665         kfree(uevent_env[0]);
 666         kfree(uevent_env[1]);
 667         kfree(uevent_env[2]);
 668
 669         if (ret)
 670                 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
 671                            "Impossible to send uevent for (%s,%s,%s) event (err: %d)\n",
 672                            batadv_uev_type_str[type],
 673                            batadv_uev_action_str[action],
 674                            (action == BATADV_UEV_DEL ? "NULL" : data), ret);
 675         return ret;
 676 }