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 #include "vis.h"
  30
  31 static struct net_device *batadv_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 batadv_priv *batadv_kobj_to_batpriv(struct kobject *obj)
  38 {
  39         struct net_device *net_dev = batadv_kobj_to_netdev(obj);
  40         return netdev_priv(net_dev);
  41 }
  42
  43 #define BATADV_UEV_TYPE_VAR     "BATTYPE="
  44 #define BATADV_UEV_ACTION_VAR   "BATACTION="
  45 #define BATADV_UEV_DATA_VAR     "BATDATA="
  46
  47 static char *batadv_uev_action_str[] = {
  48         "add",
  49         "del",
  50         "change"
  51 };
  52
  53 static char *batadv_uev_type_str[] = {
  54         "gw"
  55 };
  56
  57 /* Use this, if you have customized show and store functions */
  58 #define BATADV_ATTR(_name, _mode, _show, _store)        \
  59 struct batadv_attribute batadv_attr_##_name = {         \
  60         .attr = {.name = __stringify(_name),            \
  61                  .mode = _mode },                       \
  62         .show   = _show,                                \
  63         .store  = _store,                               \
  64 };
  65
  66 #define BATADV_ATTR_SIF_STORE_BOOL(_name, _post_func)                   \
  67 ssize_t batadv_store_##_name(struct kobject *kobj,                      \
  68                              struct attribute *attr, char *buff,        \
  69                              size_t count)                              \
  70 {                                                                       \
  71         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);       \
  72         struct batadv_priv *bat_priv = netdev_priv(net_dev);            \
  73         return __batadv_store_bool_attr(buff, count, _post_func, attr,  \
  74                                         &bat_priv->_name, net_dev);     \
  75 }
  76
  77 #define BATADV_ATTR_SIF_SHOW_BOOL(_name)                                \
  78 ssize_t batadv_show_##_name(struct kobject *kobj,                       \
  79                             struct attribute *attr, char *buff)         \
  80 {                                                                       \
  81         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);    \
  82         return sprintf(buff, "%s\n",                                    \
  83                        atomic_read(&bat_priv->_name) == 0 ?             \
  84                        "disabled" : "enabled");                         \
  85 }                                                                       \
  86
  87 /* Use this, if you are going to turn a [name] in the soft-interface
  88  * (bat_priv) on or off
  89  */
  90 #define BATADV_ATTR_SIF_BOOL(_name, _mode, _post_func)                  \
  91         static BATADV_ATTR_SIF_STORE_BOOL(_name, _post_func)            \
  92         static BATADV_ATTR_SIF_SHOW_BOOL(_name)                         \
  93         static BATADV_ATTR(_name, _mode, batadv_show_##_name,           \
  94                            batadv_store_##_name)
  95
  96
  97 #define BATADV_ATTR_SIF_STORE_UINT(_name, _min, _max, _post_func)       \
  98 ssize_t batadv_store_##_name(struct kobject *kobj,                      \
  99                              struct attribute *attr, char *buff,        \
 100                              size_t count)                              \
 101 {                                                                       \
 102         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);       \
 103         struct batadv_priv *bat_priv = netdev_priv(net_dev);            \
 104         return __batadv_store_uint_attr(buff, count, _min, _max,        \
 105                                         _post_func, attr,               \
 106                                         &bat_priv->_name, net_dev);     \
 107 }
 108
 109 #define BATADV_ATTR_SIF_SHOW_UINT(_name)                                \
 110 ssize_t batadv_show_##_name(struct kobject *kobj,                       \
 111                             struct attribute *attr, char *buff)         \
 112 {                                                                       \
 113         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);    \
 114         return sprintf(buff, "%i\n", atomic_read(&bat_priv->_name));    \
 115 }                                                                       \
 116
 117 /* Use this, if you are going to set [name] in the soft-interface
 118  * (bat_priv) to an unsigned integer value
 119  */
 120 #define BATADV_ATTR_SIF_UINT(_name, _mode, _min, _max, _post_func)      \
 121         static BATADV_ATTR_SIF_STORE_UINT(_name, _min, _max, _post_func)\
 122         static BATADV_ATTR_SIF_SHOW_UINT(_name)                         \
 123         static BATADV_ATTR(_name, _mode, batadv_show_##_name,           \
 124                            batadv_store_##_name)
 125
 126
 127 static int batadv_store_bool_attr(char *buff, size_t count,
 128                                   struct net_device *net_dev,
 129                                   const char *attr_name, atomic_t *attr)
 130 {
 131         int enabled = -1;
 132
 133         if (buff[count - 1] == '\n')
 134                 buff[count - 1] = '\0';
 135
 136         if ((strncmp(buff, "1", 2) == 0) ||
 137             (strncmp(buff, "enable", 7) == 0) ||
 138             (strncmp(buff, "enabled", 8) == 0))
 139                 enabled = 1;
 140
 141         if ((strncmp(buff, "0", 2) == 0) ||
 142             (strncmp(buff, "disable", 8) == 0) ||
 143             (strncmp(buff, "disabled", 9) == 0))
 144                 enabled = 0;
 145
 146         if (enabled < 0) {
 147                 batadv_info(net_dev, "%s: Invalid parameter received: %s\n",
 148                             attr_name, buff);
 149                 return -EINVAL;
 150         }
 151
 152         if (atomic_read(attr) == enabled)
 153                 return count;
 154
 155         batadv_info(net_dev, "%s: Changing from: %s to: %s\n", attr_name,
 156                     atomic_read(attr) == 1 ? "enabled" : "disabled",
 157                     enabled == 1 ? "enabled" : "disabled");
 158
 159         atomic_set(attr, (unsigned int)enabled);
 160         return count;
 161 }
 162
 163 static inline ssize_t
 164 __batadv_store_bool_attr(char *buff, size_t count,
 165                          void (*post_func)(struct net_device *),
 166                          struct attribute *attr,
 167                          atomic_t *attr_store, struct net_device *net_dev)
 168 {
 169         int ret;
 170
 171         ret = batadv_store_bool_attr(buff, count, net_dev, attr->name,
 172                                      attr_store);
 173         if (post_func && ret)
 174                 post_func(net_dev);
 175
 176         return ret;
 177 }
 178
 179 static int batadv_store_uint_attr(const char *buff, size_t count,
 180                                   struct net_device *net_dev,
 181                                   const char *attr_name,
 182                                   unsigned int min, unsigned int max,
 183                                   atomic_t *attr)
 184 {
 185         unsigned long uint_val;
 186         int ret;
 187
 188         ret = kstrtoul(buff, 10, &uint_val);
 189         if (ret) {
 190                 batadv_info(net_dev, "%s: Invalid parameter received: %s\n",
 191                             attr_name, buff);
 192                 return -EINVAL;
 193         }
 194
 195         if (uint_val < min) {
 196                 batadv_info(net_dev, "%s: Value is too small: %lu min: %u\n",
 197                             attr_name, uint_val, min);
 198                 return -EINVAL;
 199         }
 200
 201         if (uint_val > max) {
 202                 batadv_info(net_dev, "%s: Value is too big: %lu max: %u\n",
 203                             attr_name, uint_val, max);
 204                 return -EINVAL;
 205         }
 206
 207         if (atomic_read(attr) == uint_val)
 208                 return count;
 209
 210         batadv_info(net_dev, "%s: Changing from: %i to: %lu\n",
 211                     attr_name, atomic_read(attr), uint_val);
 212
 213         atomic_set(attr, uint_val);
 214         return count;
 215 }
 216
 217 static inline ssize_t
 218 __batadv_store_uint_attr(const char *buff, size_t count,
 219                          int min, int max,
 220                          void (*post_func)(struct net_device *),
 221                          const struct attribute *attr,
 222                          atomic_t *attr_store, struct net_device *net_dev)
 223 {
 224         int ret;
 225
 226         ret = batadv_store_uint_attr(buff, count, net_dev, attr->name, min, max,
 227                                      attr_store);
 228         if (post_func && ret)
 229                 post_func(net_dev);
 230
 231         return ret;
 232 }
 233
 234 static ssize_t batadv_show_vis_mode(struct kobject *kobj,
 235                                     struct attribute *attr, char *buff)
 236 {
 237         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 238         int vis_mode = atomic_read(&bat_priv->vis_mode);
 239         const char *mode;
 240
 241         if (vis_mode == BATADV_VIS_TYPE_CLIENT_UPDATE)
 242                 mode = "client";
 243         else
 244                 mode = "server";
 245
 246         return sprintf(buff, "%s\n", mode);
 247 }
 248
 249 static ssize_t batadv_store_vis_mode(struct kobject *kobj,
 250                                      struct attribute *attr, char *buff,
 251                                      size_t count)
 252 {
 253         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 254         struct batadv_priv *bat_priv = netdev_priv(net_dev);
 255         unsigned long val;
 256         int ret, vis_mode_tmp = -1;
 257         const char *old_mode, *new_mode;
 258
 259         ret = kstrtoul(buff, 10, &val);
 260
 261         if (((count == 2) && (!ret) &&
 262              (val == BATADV_VIS_TYPE_CLIENT_UPDATE)) ||
 263             (strncmp(buff, "client", 6) == 0) ||
 264             (strncmp(buff, "off", 3) == 0))
 265                 vis_mode_tmp = BATADV_VIS_TYPE_CLIENT_UPDATE;
 266
 267         if (((count == 2) && (!ret) &&
 268              (val == BATADV_VIS_TYPE_SERVER_SYNC)) ||
 269             (strncmp(buff, "server", 6) == 0))
 270                 vis_mode_tmp = BATADV_VIS_TYPE_SERVER_SYNC;
 271
 272         if (vis_mode_tmp < 0) {
 273                 if (buff[count - 1] == '\n')
 274                         buff[count - 1] = '\0';
 275
 276                 batadv_info(net_dev,
 277                             "Invalid parameter for 'vis mode' setting received: %s\n",
 278                             buff);
 279                 return -EINVAL;
 280         }
 281
 282         if (atomic_read(&bat_priv->vis_mode) == vis_mode_tmp)
 283                 return count;
 284
 285         if (atomic_read(&bat_priv->vis_mode) == BATADV_VIS_TYPE_CLIENT_UPDATE)
 286                 old_mode =  "client";
 287         else
 288                 old_mode = "server";
 289
 290         if (vis_mode_tmp == BATADV_VIS_TYPE_CLIENT_UPDATE)
 291                 new_mode =  "client";
 292         else
 293                 new_mode = "server";
 294
 295         batadv_info(net_dev, "Changing vis mode from: %s to: %s\n", old_mode,
 296                     new_mode);
 297
 298         atomic_set(&bat_priv->vis_mode, (unsigned int)vis_mode_tmp);
 299         return count;
 300 }
 301
 302 static ssize_t batadv_show_bat_algo(struct kobject *kobj,
 303                                     struct attribute *attr, char *buff)
 304 {
 305         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 306         return sprintf(buff, "%s\n", bat_priv->bat_algo_ops->name);
 307 }
 308
 309 static void batadv_post_gw_deselect(struct net_device *net_dev)
 310 {
 311         struct batadv_priv *bat_priv = netdev_priv(net_dev);
 312         batadv_gw_deselect(bat_priv);
 313 }
 314
 315 static ssize_t batadv_show_gw_mode(struct kobject *kobj, struct attribute *attr,
 316                                    char *buff)
 317 {
 318         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 319         int bytes_written;
 320
 321         switch (atomic_read(&bat_priv->gw_mode)) {
 322         case BATADV_GW_MODE_CLIENT:
 323                 bytes_written = sprintf(buff, "%s\n",
 324                                         BATADV_GW_MODE_CLIENT_NAME);
 325                 break;
 326         case BATADV_GW_MODE_SERVER:
 327                 bytes_written = sprintf(buff, "%s\n",
 328                                         BATADV_GW_MODE_SERVER_NAME);
 329                 break;
 330         default:
 331                 bytes_written = sprintf(buff, "%s\n",
 332                                         BATADV_GW_MODE_OFF_NAME);
 333                 break;
 334         }
 335
 336         return bytes_written;
 337 }
 338
 339 static ssize_t batadv_store_gw_mode(struct kobject *kobj,
 340                                     struct attribute *attr, char *buff,
 341                                     size_t count)
 342 {
 343         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 344         struct batadv_priv *bat_priv = netdev_priv(net_dev);
 345         char *curr_gw_mode_str;
 346         int gw_mode_tmp = -1;
 347
 348         if (buff[count - 1] == '\n')
 349                 buff[count - 1] = '\0';
 350
 351         if (strncmp(buff, BATADV_GW_MODE_OFF_NAME,
 352                     strlen(BATADV_GW_MODE_OFF_NAME)) == 0)
 353                 gw_mode_tmp = BATADV_GW_MODE_OFF;
 354
 355         if (strncmp(buff, BATADV_GW_MODE_CLIENT_NAME,
 356                     strlen(BATADV_GW_MODE_CLIENT_NAME)) == 0)
 357                 gw_mode_tmp = BATADV_GW_MODE_CLIENT;
 358
 359         if (strncmp(buff, BATADV_GW_MODE_SERVER_NAME,
 360                     strlen(BATADV_GW_MODE_SERVER_NAME)) == 0)
 361                 gw_mode_tmp = BATADV_GW_MODE_SERVER;
 362
 363         if (gw_mode_tmp < 0) {
 364                 batadv_info(net_dev,
 365                             "Invalid parameter for 'gw mode' setting received: %s\n",
 366                             buff);
 367                 return -EINVAL;
 368         }
 369
 370         if (atomic_read(&bat_priv->gw_mode) == gw_mode_tmp)
 371                 return count;
 372
 373         switch (atomic_read(&bat_priv->gw_mode)) {
 374         case BATADV_GW_MODE_CLIENT:
 375                 curr_gw_mode_str = BATADV_GW_MODE_CLIENT_NAME;
 376                 break;
 377         case BATADV_GW_MODE_SERVER:
 378                 curr_gw_mode_str = BATADV_GW_MODE_SERVER_NAME;
 379                 break;
 380         default:
 381                 curr_gw_mode_str = BATADV_GW_MODE_OFF_NAME;
 382                 break;
 383         }
 384
 385         batadv_info(net_dev, "Changing gw mode from: %s to: %s\n",
 386                     curr_gw_mode_str, buff);
 387
 388         batadv_gw_deselect(bat_priv);
 389         /* always call batadv_gw_check_client_stop() before changing the gateway
 390          * state
 391          */
 392         batadv_gw_check_client_stop(bat_priv);
 393         atomic_set(&bat_priv->gw_mode, (unsigned int)gw_mode_tmp);
 394         batadv_gw_tvlv_container_update(bat_priv);
 395         return count;
 396 }
 397
 398 static ssize_t batadv_show_gw_bwidth(struct kobject *kobj,
 399                                      struct attribute *attr, char *buff)
 400 {
 401         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 402         uint32_t down, up;
 403
 404         down = atomic_read(&bat_priv->gw.bandwidth_down);
 405         up = atomic_read(&bat_priv->gw.bandwidth_up);
 406
 407         return sprintf(buff, "%u.%u/%u.%u MBit\n", down / 10,
 408                        down % 10, up / 10, up % 10);
 409 }
 410
 411 static ssize_t batadv_store_gw_bwidth(struct kobject *kobj,
 412                                       struct attribute *attr, char *buff,
 413                                       size_t count)
 414 {
 415         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 416
 417         if (buff[count - 1] == '\n')
 418                 buff[count - 1] = '\0';
 419
 420         return batadv_gw_bandwidth_set(net_dev, buff, count);
 421 }
 422
 423 BATADV_ATTR_SIF_BOOL(aggregated_ogms, S_IRUGO | S_IWUSR, NULL);
 424 BATADV_ATTR_SIF_BOOL(bonding, S_IRUGO | S_IWUSR, NULL);
 425 #ifdef CONFIG_BATMAN_ADV_BLA
 426 BATADV_ATTR_SIF_BOOL(bridge_loop_avoidance, S_IRUGO | S_IWUSR, NULL);
 427 #endif
 428 #ifdef CONFIG_BATMAN_ADV_DAT
 429 BATADV_ATTR_SIF_BOOL(distributed_arp_table, S_IRUGO | S_IWUSR,
 430                      batadv_dat_status_update);
 431 #endif
 432 BATADV_ATTR_SIF_BOOL(fragmentation, S_IRUGO | S_IWUSR, batadv_update_min_mtu);
 433 BATADV_ATTR_SIF_BOOL(ap_isolation, S_IRUGO | S_IWUSR, NULL);
 434 static BATADV_ATTR(vis_mode, S_IRUGO | S_IWUSR, batadv_show_vis_mode,
 435                    batadv_store_vis_mode);
 436 static BATADV_ATTR(routing_algo, S_IRUGO, batadv_show_bat_algo, NULL);
 437 static BATADV_ATTR(gw_mode, S_IRUGO | S_IWUSR, batadv_show_gw_mode,
 438                    batadv_store_gw_mode);
 439 BATADV_ATTR_SIF_UINT(orig_interval, S_IRUGO | S_IWUSR, 2 * BATADV_JITTER,
 440                      INT_MAX, NULL);
 441 BATADV_ATTR_SIF_UINT(hop_penalty, S_IRUGO | S_IWUSR, 0, BATADV_TQ_MAX_VALUE,
 442                      NULL);
 443 BATADV_ATTR_SIF_UINT(gw_sel_class, S_IRUGO | S_IWUSR, 1, BATADV_TQ_MAX_VALUE,
 444                      batadv_post_gw_deselect);
 445 static BATADV_ATTR(gw_bandwidth, S_IRUGO | S_IWUSR, batadv_show_gw_bwidth,
 446                    batadv_store_gw_bwidth);
 447 #ifdef CONFIG_BATMAN_ADV_DEBUG
 448 BATADV_ATTR_SIF_UINT(log_level, S_IRUGO | S_IWUSR, 0, BATADV_DBG_ALL, NULL);
 449 #endif
 450 #ifdef CONFIG_BATMAN_ADV_NC
 451 BATADV_ATTR_SIF_BOOL(network_coding, S_IRUGO | S_IWUSR,
 452                      batadv_nc_status_update);
 453 #endif
 454
 455 static struct batadv_attribute *batadv_mesh_attrs[] = {
 456         &batadv_attr_aggregated_ogms,
 457         &batadv_attr_bonding,
 458 #ifdef CONFIG_BATMAN_ADV_BLA
 459         &batadv_attr_bridge_loop_avoidance,
 460 #endif
 461 #ifdef CONFIG_BATMAN_ADV_DAT
 462         &batadv_attr_distributed_arp_table,
 463 #endif
 464         &batadv_attr_fragmentation,
 465         &batadv_attr_ap_isolation,
 466         &batadv_attr_vis_mode,
 467         &batadv_attr_routing_algo,
 468         &batadv_attr_gw_mode,
 469         &batadv_attr_orig_interval,
 470         &batadv_attr_hop_penalty,
 471         &batadv_attr_gw_sel_class,
 472         &batadv_attr_gw_bandwidth,
 473 #ifdef CONFIG_BATMAN_ADV_DEBUG
 474         &batadv_attr_log_level,
 475 #endif
 476 #ifdef CONFIG_BATMAN_ADV_NC
 477         &batadv_attr_network_coding,
 478 #endif
 479         NULL,
 480 };
 481
 482 int batadv_sysfs_add_meshif(struct net_device *dev)
 483 {
 484         struct kobject *batif_kobject = &dev->dev.kobj;
 485         struct batadv_priv *bat_priv = netdev_priv(dev);
 486         struct batadv_attribute **bat_attr;
 487         int err;
 488
 489         bat_priv->mesh_obj = kobject_create_and_add(BATADV_SYSFS_IF_MESH_SUBDIR,
 490                                                     batif_kobject);
 491         if (!bat_priv->mesh_obj) {
 492                 batadv_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
 493                            BATADV_SYSFS_IF_MESH_SUBDIR);
 494                 goto out;
 495         }
 496
 497         for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr) {
 498                 err = sysfs_create_file(bat_priv->mesh_obj,
 499                                         &((*bat_attr)->attr));
 500                 if (err) {
 501                         batadv_err(dev, "Can't add sysfs file: %s/%s/%s\n",
 502                                    dev->name, BATADV_SYSFS_IF_MESH_SUBDIR,
 503                                    ((*bat_attr)->attr).name);
 504                         goto rem_attr;
 505                 }
 506         }
 507
 508         return 0;
 509
 510 rem_attr:
 511         for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr)
 512                 sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
 513
 514         kobject_put(bat_priv->mesh_obj);
 515         bat_priv->mesh_obj = NULL;
 516 out:
 517         return -ENOMEM;
 518 }
 519
 520 void batadv_sysfs_del_meshif(struct net_device *dev)
 521 {
 522         struct batadv_priv *bat_priv = netdev_priv(dev);
 523         struct batadv_attribute **bat_attr;
 524
 525         for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr)
 526                 sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
 527
 528         kobject_put(bat_priv->mesh_obj);
 529         bat_priv->mesh_obj = NULL;
 530 }
 531
 532 static ssize_t batadv_show_mesh_iface(struct kobject *kobj,
 533                                       struct attribute *attr, char *buff)
 534 {
 535         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 536         struct batadv_hard_iface *hard_iface;
 537         ssize_t length;
 538         const char *ifname;
 539
 540         hard_iface = batadv_hardif_get_by_netdev(net_dev);
 541         if (!hard_iface)
 542                 return 0;
 543
 544         if (hard_iface->if_status == BATADV_IF_NOT_IN_USE)
 545                 ifname =  "none";
 546         else
 547                 ifname = hard_iface->soft_iface->name;
 548
 549         length = sprintf(buff, "%s\n", ifname);
 550
 551         batadv_hardif_free_ref(hard_iface);
 552
 553         return length;
 554 }
 555
 556 static ssize_t batadv_store_mesh_iface(struct kobject *kobj,
 557                                        struct attribute *attr, char *buff,
 558                                        size_t count)
 559 {
 560         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 561         struct batadv_hard_iface *hard_iface;
 562         int status_tmp = -1;
 563         int ret = count;
 564
 565         hard_iface = batadv_hardif_get_by_netdev(net_dev);
 566         if (!hard_iface)
 567                 return count;
 568
 569         if (buff[count - 1] == '\n')
 570                 buff[count - 1] = '\0';
 571
 572         if (strlen(buff) >= IFNAMSIZ) {
 573                 pr_err("Invalid parameter for 'mesh_iface' setting received: interface name too long '%s'\n",
 574                        buff);
 575                 batadv_hardif_free_ref(hard_iface);
 576                 return -EINVAL;
 577         }
 578
 579         if (strncmp(buff, "none", 4) == 0)
 580                 status_tmp = BATADV_IF_NOT_IN_USE;
 581         else
 582                 status_tmp = BATADV_IF_I_WANT_YOU;
 583
 584         if (hard_iface->if_status == status_tmp)
 585                 goto out;
 586
 587         if ((hard_iface->soft_iface) &&
 588             (strncmp(hard_iface->soft_iface->name, buff, IFNAMSIZ) == 0))
 589                 goto out;
 590
 591         rtnl_lock();
 592
 593         if (status_tmp == BATADV_IF_NOT_IN_USE) {
 594                 batadv_hardif_disable_interface(hard_iface,
 595                                                 BATADV_IF_CLEANUP_AUTO);
 596                 goto unlock;
 597         }
 598
 599         /* if the interface already is in use */
 600         if (hard_iface->if_status != BATADV_IF_NOT_IN_USE)
 601                 batadv_hardif_disable_interface(hard_iface,
 602                                                 BATADV_IF_CLEANUP_AUTO);
 603
 604         ret = batadv_hardif_enable_interface(hard_iface, buff);
 605
 606 unlock:
 607         rtnl_unlock();
 608 out:
 609         batadv_hardif_free_ref(hard_iface);
 610         return ret;
 611 }
 612
 613 static ssize_t batadv_show_iface_status(struct kobject *kobj,
 614                                         struct attribute *attr, char *buff)
 615 {
 616         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 617         struct batadv_hard_iface *hard_iface;
 618         ssize_t length;
 619
 620         hard_iface = batadv_hardif_get_by_netdev(net_dev);
 621         if (!hard_iface)
 622                 return 0;
 623
 624         switch (hard_iface->if_status) {
 625         case BATADV_IF_TO_BE_REMOVED:
 626                 length = sprintf(buff, "disabling\n");
 627                 break;
 628         case BATADV_IF_INACTIVE:
 629                 length = sprintf(buff, "inactive\n");
 630                 break;
 631         case BATADV_IF_ACTIVE:
 632                 length = sprintf(buff, "active\n");
 633                 break;
 634         case BATADV_IF_TO_BE_ACTIVATED:
 635                 length = sprintf(buff, "enabling\n");
 636                 break;
 637         case BATADV_IF_NOT_IN_USE:
 638         default:
 639                 length = sprintf(buff, "not in use\n");
 640                 break;
 641         }
 642
 643         batadv_hardif_free_ref(hard_iface);
 644
 645         return length;
 646 }
 647
 648 static BATADV_ATTR(mesh_iface, S_IRUGO | S_IWUSR, batadv_show_mesh_iface,
 649                    batadv_store_mesh_iface);
 650 static BATADV_ATTR(iface_status, S_IRUGO, batadv_show_iface_status, NULL);
 651
 652 static struct batadv_attribute *batadv_batman_attrs[] = {
 653         &batadv_attr_mesh_iface,
 654         &batadv_attr_iface_status,
 655         NULL,
 656 };
 657
 658 int batadv_sysfs_add_hardif(struct kobject **hardif_obj, struct net_device *dev)
 659 {
 660         struct kobject *hardif_kobject = &dev->dev.kobj;
 661         struct batadv_attribute **bat_attr;
 662         int err;
 663
 664         *hardif_obj = kobject_create_and_add(BATADV_SYSFS_IF_BAT_SUBDIR,
 665                                              hardif_kobject);
 666
 667         if (!*hardif_obj) {
 668                 batadv_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
 669                            BATADV_SYSFS_IF_BAT_SUBDIR);
 670                 goto out;
 671         }
 672
 673         for (bat_attr = batadv_batman_attrs; *bat_attr; ++bat_attr) {
 674                 err = sysfs_create_file(*hardif_obj, &((*bat_attr)->attr));
 675                 if (err) {
 676                         batadv_err(dev, "Can't add sysfs file: %s/%s/%s\n",
 677                                    dev->name, BATADV_SYSFS_IF_BAT_SUBDIR,
 678                                    ((*bat_attr)->attr).name);
 679                         goto rem_attr;
 680                 }
 681         }
 682
 683         return 0;
 684
 685 rem_attr:
 686         for (bat_attr = batadv_batman_attrs; *bat_attr; ++bat_attr)
 687                 sysfs_remove_file(*hardif_obj, &((*bat_attr)->attr));
 688 out:
 689         return -ENOMEM;
 690 }
 691
 692 void batadv_sysfs_del_hardif(struct kobject **hardif_obj)
 693 {
 694         kobject_put(*hardif_obj);
 695         *hardif_obj = NULL;
 696 }
 697
 698 int batadv_throw_uevent(struct batadv_priv *bat_priv, enum batadv_uev_type type,
 699                         enum batadv_uev_action action, const char *data)
 700 {
 701         int ret = -ENOMEM;
 702         struct kobject *bat_kobj;
 703         char *uevent_env[4] = { NULL, NULL, NULL, NULL };
 704
 705         bat_kobj = &bat_priv->soft_iface->dev.kobj;
 706
 707         uevent_env[0] = kmalloc(strlen(BATADV_UEV_TYPE_VAR) +
 708                                 strlen(batadv_uev_type_str[type]) + 1,
 709                                 GFP_ATOMIC);
 710         if (!uevent_env[0])
 711                 goto out;
 712
 713         sprintf(uevent_env[0], "%s%s", BATADV_UEV_TYPE_VAR,
 714                 batadv_uev_type_str[type]);
 715
 716         uevent_env[1] = kmalloc(strlen(BATADV_UEV_ACTION_VAR) +
 717                                 strlen(batadv_uev_action_str[action]) + 1,
 718                                 GFP_ATOMIC);
 719         if (!uevent_env[1])
 720                 goto out;
 721
 722         sprintf(uevent_env[1], "%s%s", BATADV_UEV_ACTION_VAR,
 723                 batadv_uev_action_str[action]);
 724
 725         /* If the event is DEL, ignore the data field */
 726         if (action != BATADV_UEV_DEL) {
 727                 uevent_env[2] = kmalloc(strlen(BATADV_UEV_DATA_VAR) +
 728                                         strlen(data) + 1, GFP_ATOMIC);
 729                 if (!uevent_env[2])
 730                         goto out;
 731
 732                 sprintf(uevent_env[2], "%s%s", BATADV_UEV_DATA_VAR, data);
 733         }
 734
 735         ret = kobject_uevent_env(bat_kobj, KOBJ_CHANGE, uevent_env);
 736 out:
 737         kfree(uevent_env[0]);
 738         kfree(uevent_env[1]);
 739         kfree(uevent_env[2]);
 740
 741         if (ret)
 742                 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
 743                            "Impossible to send uevent for (%s,%s,%s) event (err: %d)\n",
 744                            batadv_uev_type_str[type],
 745                            batadv_uev_action_str[action],
 746                            (action == BATADV_UEV_DEL ? "NULL" : data), ret);
 747         return ret;
 748 }