net/batman-adv/bat_sysfs.c

   1 /* Copyright (C) 2010-2012 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 "bat_sysfs.h"
  22 #include "translation-table.h"
  23 #include "originator.h"
  24 #include "hard-interface.h"
  25 #include "gateway_common.h"
  26 #include "gateway_client.h"
  27 #include "vis.h"
  28
  29 static struct net_device *batadv_kobj_to_netdev(struct kobject *obj)
  30 {
  31         struct device *dev = container_of(obj->parent, struct device, kobj);
  32         return to_net_dev(dev);
  33 }
  34
  35 static struct bat_priv *batadv_kobj_to_batpriv(struct kobject *obj)
  36 {
  37         struct net_device *net_dev = batadv_kobj_to_netdev(obj);
  38         return netdev_priv(net_dev);
  39 }
  40
  41 #define BATADV_UEV_TYPE_VAR     "BATTYPE="
  42 #define BATADV_UEV_ACTION_VAR   "BATACTION="
  43 #define BATADV_UEV_DATA_VAR     "BATDATA="
  44
  45 static char *batadv_uev_action_str[] = {
  46         "add",
  47         "del",
  48         "change"
  49 };
  50
  51 static char *batadv_uev_type_str[] = {
  52         "gw"
  53 };
  54
  55 /* Use this, if you have customized show and store functions */
  56 #define BATADV_ATTR(_name, _mode, _show, _store)        \
  57 struct bat_attribute batadv_attr_##_name = {            \
  58         .attr = {.name = __stringify(_name),            \
  59                  .mode = _mode },                       \
  60         .show   = _show,                                \
  61         .store  = _store,                               \
  62 };
  63
  64 #define BATADV_ATTR_SIF_STORE_BOOL(_name, _post_func)                   \
  65 ssize_t batadv_store_##_name(struct kobject *kobj,                      \
  66                              struct attribute *attr, char *buff,        \
  67                              size_t count)                              \
  68 {                                                                       \
  69         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);       \
  70         struct bat_priv *bat_priv = netdev_priv(net_dev);               \
  71         return __batadv_store_bool_attr(buff, count, _post_func, attr,  \
  72                                         &bat_priv->_name, net_dev);     \
  73 }
  74
  75 #define BATADV_ATTR_SIF_SHOW_BOOL(_name)                                \
  76 ssize_t batadv_show_##_name(struct kobject *kobj,                       \
  77                             struct attribute *attr, char *buff)         \
  78 {                                                                       \
  79         struct bat_priv *bat_priv = batadv_kobj_to_batpriv(kobj);       \
  80         return sprintf(buff, "%s\n",                                    \
  81                        atomic_read(&bat_priv->_name) == 0 ?             \
  82                        "disabled" : "enabled");                         \
  83 }                                                                       \
  84
  85 /* Use this, if you are going to turn a [name] in the soft-interface
  86  * (bat_priv) on or off
  87  */
  88 #define BATADV_ATTR_SIF_BOOL(_name, _mode, _post_func)                  \
  89         static BATADV_ATTR_SIF_STORE_BOOL(_name, _post_func)            \
  90         static BATADV_ATTR_SIF_SHOW_BOOL(_name)                         \
  91         static BATADV_ATTR(_name, _mode, batadv_show_##_name,           \
  92                            batadv_store_##_name)
  93
  94
  95 #define BATADV_ATTR_SIF_STORE_UINT(_name, _min, _max, _post_func)       \
  96 ssize_t batadv_store_##_name(struct kobject *kobj,                      \
  97                              struct attribute *attr, char *buff,        \
  98                              size_t count)                              \
  99 {                                                                       \
 100         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);       \
 101         struct bat_priv *bat_priv = netdev_priv(net_dev);               \
 102         return __batadv_store_uint_attr(buff, count, _min, _max,        \
 103                                         _post_func, attr,               \
 104                                         &bat_priv->_name, net_dev);     \
 105 }
 106
 107 #define BATADV_ATTR_SIF_SHOW_UINT(_name)                                \
 108 ssize_t batadv_show_##_name(struct kobject *kobj,                       \
 109                             struct attribute *attr, char *buff)         \
 110 {                                                                       \
 111         struct bat_priv *bat_priv = batadv_kobj_to_batpriv(kobj);       \
 112         return sprintf(buff, "%i\n", atomic_read(&bat_priv->_name));    \
 113 }                                                                       \
 114
 115 /* Use this, if you are going to set [name] in the soft-interface
 116  * (bat_priv) to an unsigned integer value
 117  */
 118 #define BATADV_ATTR_SIF_UINT(_name, _mode, _min, _max, _post_func)      \
 119         static BATADV_ATTR_SIF_STORE_UINT(_name, _min, _max, _post_func)\
 120         static BATADV_ATTR_SIF_SHOW_UINT(_name)                         \
 121         static BATADV_ATTR(_name, _mode, batadv_show_##_name,           \
 122                            batadv_store_##_name)
 123
 124
 125 #define BATADV_ATTR_HIF_STORE_UINT(_name, _min, _max, _post_func)       \
 126 ssize_t batadv_store_##_name(struct kobject *kobj,                      \
 127                              struct attribute *attr, char *buff,        \
 128                              size_t count)                              \
 129 {                                                                       \
 130         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);       \
 131         struct hard_iface *hard_iface;                                  \
 132         ssize_t length;                                                 \
 133                                                                         \
 134         hard_iface = batadv_hardif_get_by_netdev(net_dev);              \
 135         if (!hard_iface)                                                \
 136                 return 0;                                               \
 137                                                                         \
 138         length = __batadv_store_uint_attr(buff, count, _min, _max,      \
 139                                           _post_func, attr,             \
 140                                           &hard_iface->_name, net_dev); \
 141                                                                         \
 142         batadv_hardif_free_ref(hard_iface);                             \
 143         return length;                                                  \
 144 }
 145
 146 #define BATADV_ATTR_HIF_SHOW_UINT(_name)                                \
 147 ssize_t batadv_show_##_name(struct kobject *kobj,                       \
 148                             struct attribute *attr, char *buff)         \
 149 {                                                                       \
 150         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);       \
 151         struct hard_iface *hard_iface;                                  \
 152         ssize_t length;                                                 \
 153                                                                         \
 154         hard_iface = batadv_hardif_get_by_netdev(net_dev);              \
 155         if (!hard_iface)                                                \
 156                 return 0;                                               \
 157                                                                         \
 158         length = sprintf(buff, "%i\n", atomic_read(&hard_iface->_name));\
 159                                                                         \
 160         batadv_hardif_free_ref(hard_iface);                             \
 161         return length;                                                  \
 162 }
 163
 164 /* Use this, if you are going to set [name] in hard_iface to an
 165  * unsigned integer value
 166  */
 167 #define BATADV_ATTR_HIF_UINT(_name, _mode, _min, _max, _post_func)      \
 168         static BATADV_ATTR_HIF_STORE_UINT(_name, _min, _max, _post_func)\
 169         static BATADV_ATTR_HIF_SHOW_UINT(_name)                         \
 170         static BATADV_ATTR(_name, _mode, batadv_show_##_name,           \
 171                            batadv_store_##_name)
 172
 173
 174 static int batadv_store_bool_attr(char *buff, size_t count,
 175                                   struct net_device *net_dev,
 176                                   const char *attr_name, atomic_t *attr)
 177 {
 178         int enabled = -1;
 179
 180         if (buff[count - 1] == '\n')
 181                 buff[count - 1] = '\0';
 182
 183         if ((strncmp(buff, "1", 2) == 0) ||
 184             (strncmp(buff, "enable", 7) == 0) ||
 185             (strncmp(buff, "enabled", 8) == 0))
 186                 enabled = 1;
 187
 188         if ((strncmp(buff, "0", 2) == 0) ||
 189             (strncmp(buff, "disable", 8) == 0) ||
 190             (strncmp(buff, "disabled", 9) == 0))
 191                 enabled = 0;
 192
 193         if (enabled < 0) {
 194                 batadv_info(net_dev, "%s: Invalid parameter received: %s\n",
 195                             attr_name, buff);
 196                 return -EINVAL;
 197         }
 198
 199         if (atomic_read(attr) == enabled)
 200                 return count;
 201
 202         batadv_info(net_dev, "%s: Changing from: %s to: %s\n", attr_name,
 203                     atomic_read(attr) == 1 ? "enabled" : "disabled",
 204                     enabled == 1 ? "enabled" : "disabled");
 205
 206         atomic_set(attr, (unsigned int)enabled);
 207         return count;
 208 }
 209
 210 static inline ssize_t
 211 __batadv_store_bool_attr(char *buff, size_t count,
 212                          void (*post_func)(struct net_device *),
 213                          struct attribute *attr,
 214                          atomic_t *attr_store, struct net_device *net_dev)
 215 {
 216         int ret;
 217
 218         ret = batadv_store_bool_attr(buff, count, net_dev, attr->name,
 219                                      attr_store);
 220         if (post_func && ret)
 221                 post_func(net_dev);
 222
 223         return ret;
 224 }
 225
 226 static int batadv_store_uint_attr(const char *buff, size_t count,
 227                                   struct net_device *net_dev,
 228                                   const char *attr_name,
 229                                   unsigned int min, unsigned int max,
 230                                   atomic_t *attr)
 231 {
 232         unsigned long uint_val;
 233         int ret;
 234
 235         ret = kstrtoul(buff, 10, &uint_val);
 236         if (ret) {
 237                 batadv_info(net_dev, "%s: Invalid parameter received: %s\n",
 238                             attr_name, buff);
 239                 return -EINVAL;
 240         }
 241
 242         if (uint_val < min) {
 243                 batadv_info(net_dev, "%s: Value is too small: %lu min: %u\n",
 244                             attr_name, uint_val, min);
 245                 return -EINVAL;
 246         }
 247
 248         if (uint_val > max) {
 249                 batadv_info(net_dev, "%s: Value is too big: %lu max: %u\n",
 250                             attr_name, uint_val, max);
 251                 return -EINVAL;
 252         }
 253
 254         if (atomic_read(attr) == uint_val)
 255                 return count;
 256
 257         batadv_info(net_dev, "%s: Changing from: %i to: %lu\n",
 258                     attr_name, atomic_read(attr), uint_val);
 259
 260         atomic_set(attr, uint_val);
 261         return count;
 262 }
 263
 264 static inline ssize_t
 265 __batadv_store_uint_attr(const char *buff, size_t count,
 266                          int min, int max,
 267                          void (*post_func)(struct net_device *),
 268                          const struct attribute *attr,
 269                          atomic_t *attr_store, struct net_device *net_dev)
 270 {
 271         int ret;
 272
 273         ret = batadv_store_uint_attr(buff, count, net_dev, attr->name, min, max,
 274                                      attr_store);
 275         if (post_func && ret)
 276                 post_func(net_dev);
 277
 278         return ret;
 279 }
 280
 281 static ssize_t batadv_show_vis_mode(struct kobject *kobj,
 282                                     struct attribute *attr, char *buff)
 283 {
 284         struct bat_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 285         int vis_mode = atomic_read(&bat_priv->vis_mode);
 286
 287         return sprintf(buff, "%s\n",
 288                        vis_mode == VIS_TYPE_CLIENT_UPDATE ?
 289                                                         "client" : "server");
 290 }
 291
 292 static ssize_t batadv_store_vis_mode(struct kobject *kobj,
 293                                      struct attribute *attr, char *buff,
 294                                      size_t count)
 295 {
 296         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 297         struct bat_priv *bat_priv = netdev_priv(net_dev);
 298         unsigned long val;
 299         int ret, vis_mode_tmp = -1;
 300         const char *old_mode, *new_mode;
 301
 302         ret = kstrtoul(buff, 10, &val);
 303
 304         if (((count == 2) && (!ret) && (val == VIS_TYPE_CLIENT_UPDATE)) ||
 305             (strncmp(buff, "client", 6) == 0) ||
 306             (strncmp(buff, "off", 3) == 0))
 307                 vis_mode_tmp = VIS_TYPE_CLIENT_UPDATE;
 308
 309         if (((count == 2) && (!ret) && (val == VIS_TYPE_SERVER_SYNC)) ||
 310             (strncmp(buff, "server", 6) == 0))
 311                 vis_mode_tmp = VIS_TYPE_SERVER_SYNC;
 312
 313         if (vis_mode_tmp < 0) {
 314                 if (buff[count - 1] == '\n')
 315                         buff[count - 1] = '\0';
 316
 317                 batadv_info(net_dev,
 318                             "Invalid parameter for 'vis mode' setting received: %s\n",
 319                             buff);
 320                 return -EINVAL;
 321         }
 322
 323         if (atomic_read(&bat_priv->vis_mode) == vis_mode_tmp)
 324                 return count;
 325
 326         if (atomic_read(&bat_priv->vis_mode) == VIS_TYPE_CLIENT_UPDATE)
 327                 old_mode =  "client";
 328         else
 329                 old_mode = "server";
 330
 331         if (vis_mode_tmp == VIS_TYPE_CLIENT_UPDATE)
 332                 new_mode =  "client";
 333         else
 334                 new_mode = "server";
 335
 336         batadv_info(net_dev, "Changing vis mode from: %s to: %s\n", old_mode,
 337                     new_mode);
 338
 339         atomic_set(&bat_priv->vis_mode, (unsigned int)vis_mode_tmp);
 340         return count;
 341 }
 342
 343 static ssize_t batadv_show_bat_algo(struct kobject *kobj,
 344                                     struct attribute *attr, char *buff)
 345 {
 346         struct bat_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 347         return sprintf(buff, "%s\n", bat_priv->bat_algo_ops->name);
 348 }
 349
 350 static void batadv_post_gw_deselect(struct net_device *net_dev)
 351 {
 352         struct bat_priv *bat_priv = netdev_priv(net_dev);
 353         batadv_gw_deselect(bat_priv);
 354 }
 355
 356 static ssize_t batadv_show_gw_mode(struct kobject *kobj, struct attribute *attr,
 357                                    char *buff)
 358 {
 359         struct bat_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 360         int bytes_written;
 361
 362         switch (atomic_read(&bat_priv->gw_mode)) {
 363         case GW_MODE_CLIENT:
 364                 bytes_written = sprintf(buff, "%s\n", GW_MODE_CLIENT_NAME);
 365                 break;
 366         case GW_MODE_SERVER:
 367                 bytes_written = sprintf(buff, "%s\n", GW_MODE_SERVER_NAME);
 368                 break;
 369         default:
 370                 bytes_written = sprintf(buff, "%s\n", GW_MODE_OFF_NAME);
 371                 break;
 372         }
 373
 374         return bytes_written;
 375 }
 376
 377 static ssize_t batadv_store_gw_mode(struct kobject *kobj,
 378                                     struct attribute *attr, char *buff,
 379                                     size_t count)
 380 {
 381         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 382         struct bat_priv *bat_priv = netdev_priv(net_dev);
 383         char *curr_gw_mode_str;
 384         int gw_mode_tmp = -1;
 385
 386         if (buff[count - 1] == '\n')
 387                 buff[count - 1] = '\0';
 388
 389         if (strncmp(buff, GW_MODE_OFF_NAME, strlen(GW_MODE_OFF_NAME)) == 0)
 390                 gw_mode_tmp = GW_MODE_OFF;
 391
 392         if (strncmp(buff, GW_MODE_CLIENT_NAME,
 393                     strlen(GW_MODE_CLIENT_NAME)) == 0)
 394                 gw_mode_tmp = GW_MODE_CLIENT;
 395
 396         if (strncmp(buff, GW_MODE_SERVER_NAME,
 397                     strlen(GW_MODE_SERVER_NAME)) == 0)
 398                 gw_mode_tmp = GW_MODE_SERVER;
 399
 400         if (gw_mode_tmp < 0) {
 401                 batadv_info(net_dev,
 402                             "Invalid parameter for 'gw mode' setting received: %s\n",
 403                             buff);
 404                 return -EINVAL;
 405         }
 406
 407         if (atomic_read(&bat_priv->gw_mode) == gw_mode_tmp)
 408                 return count;
 409
 410         switch (atomic_read(&bat_priv->gw_mode)) {
 411         case GW_MODE_CLIENT:
 412                 curr_gw_mode_str = GW_MODE_CLIENT_NAME;
 413                 break;
 414         case GW_MODE_SERVER:
 415                 curr_gw_mode_str = GW_MODE_SERVER_NAME;
 416                 break;
 417         default:
 418                 curr_gw_mode_str = GW_MODE_OFF_NAME;
 419                 break;
 420         }
 421
 422         batadv_info(net_dev, "Changing gw mode from: %s to: %s\n",
 423                     curr_gw_mode_str, buff);
 424
 425         batadv_gw_deselect(bat_priv);
 426         atomic_set(&bat_priv->gw_mode, (unsigned int)gw_mode_tmp);
 427         return count;
 428 }
 429
 430 static ssize_t batadv_show_gw_bwidth(struct kobject *kobj,
 431                                      struct attribute *attr, char *buff)
 432 {
 433         struct bat_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 434         int down, up;
 435         int gw_bandwidth = atomic_read(&bat_priv->gw_bandwidth);
 436
 437         batadv_gw_bandwidth_to_kbit(gw_bandwidth, &down, &up);
 438         return sprintf(buff, "%i%s/%i%s\n",
 439                        (down > 2048 ? down / 1024 : down),
 440                        (down > 2048 ? "MBit" : "KBit"),
 441                        (up > 2048 ? up / 1024 : up),
 442                        (up > 2048 ? "MBit" : "KBit"));
 443 }
 444
 445 static ssize_t batadv_store_gw_bwidth(struct kobject *kobj,
 446                                       struct attribute *attr, char *buff,
 447                                       size_t count)
 448 {
 449         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 450
 451         if (buff[count - 1] == '\n')
 452                 buff[count - 1] = '\0';
 453
 454         return batadv_gw_bandwidth_set(net_dev, buff, count);
 455 }
 456
 457 BATADV_ATTR_SIF_BOOL(aggregated_ogms, S_IRUGO | S_IWUSR, NULL);
 458 BATADV_ATTR_SIF_BOOL(bonding, S_IRUGO | S_IWUSR, NULL);
 459 #ifdef CONFIG_BATMAN_ADV_BLA
 460 BATADV_ATTR_SIF_BOOL(bridge_loop_avoidance, S_IRUGO | S_IWUSR, NULL);
 461 #endif
 462 BATADV_ATTR_SIF_BOOL(fragmentation, S_IRUGO | S_IWUSR, batadv_update_min_mtu);
 463 BATADV_ATTR_SIF_BOOL(ap_isolation, S_IRUGO | S_IWUSR, NULL);
 464 static BATADV_ATTR(vis_mode, S_IRUGO | S_IWUSR, batadv_show_vis_mode,
 465                    batadv_store_vis_mode);
 466 static BATADV_ATTR(routing_algo, S_IRUGO, batadv_show_bat_algo, NULL);
 467 static BATADV_ATTR(gw_mode, S_IRUGO | S_IWUSR, batadv_show_gw_mode,
 468                    batadv_store_gw_mode);
 469 BATADV_ATTR_SIF_UINT(orig_interval, S_IRUGO | S_IWUSR, 2 * JITTER, INT_MAX,
 470                      NULL);
 471 BATADV_ATTR_SIF_UINT(hop_penalty, S_IRUGO | S_IWUSR, 0, TQ_MAX_VALUE, NULL);
 472 BATADV_ATTR_SIF_UINT(gw_sel_class, S_IRUGO | S_IWUSR, 1, TQ_MAX_VALUE,
 473                      batadv_post_gw_deselect);
 474 static BATADV_ATTR(gw_bandwidth, S_IRUGO | S_IWUSR, batadv_show_gw_bwidth,
 475                    batadv_store_gw_bwidth);
 476 #ifdef CONFIG_BATMAN_ADV_DEBUG
 477 BATADV_ATTR_SIF_UINT(log_level, S_IRUGO | S_IWUSR, 0, DBG_ALL, NULL);
 478 #endif
 479
 480 static struct bat_attribute *batadv_mesh_attrs[] = {
 481         &batadv_attr_aggregated_ogms,
 482         &batadv_attr_bonding,
 483 #ifdef CONFIG_BATMAN_ADV_BLA
 484         &batadv_attr_bridge_loop_avoidance,
 485 #endif
 486         &batadv_attr_fragmentation,
 487         &batadv_attr_ap_isolation,
 488         &batadv_attr_vis_mode,
 489         &batadv_attr_routing_algo,
 490         &batadv_attr_gw_mode,
 491         &batadv_attr_orig_interval,
 492         &batadv_attr_hop_penalty,
 493         &batadv_attr_gw_sel_class,
 494         &batadv_attr_gw_bandwidth,
 495 #ifdef CONFIG_BATMAN_ADV_DEBUG
 496         &batadv_attr_log_level,
 497 #endif
 498         NULL,
 499 };
 500
 501 int batadv_sysfs_add_meshif(struct net_device *dev)
 502 {
 503         struct kobject *batif_kobject = &dev->dev.kobj;
 504         struct bat_priv *bat_priv = netdev_priv(dev);
 505         struct bat_attribute **bat_attr;
 506         int err;
 507
 508         bat_priv->mesh_obj = kobject_create_and_add(SYSFS_IF_MESH_SUBDIR,
 509                                                     batif_kobject);
 510         if (!bat_priv->mesh_obj) {
 511                 batadv_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
 512                            SYSFS_IF_MESH_SUBDIR);
 513                 goto out;
 514         }
 515
 516         for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr) {
 517                 err = sysfs_create_file(bat_priv->mesh_obj,
 518                                         &((*bat_attr)->attr));
 519                 if (err) {
 520                         batadv_err(dev, "Can't add sysfs file: %s/%s/%s\n",
 521                                    dev->name, SYSFS_IF_MESH_SUBDIR,
 522                                    ((*bat_attr)->attr).name);
 523                         goto rem_attr;
 524                 }
 525         }
 526
 527         return 0;
 528
 529 rem_attr:
 530         for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr)
 531                 sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
 532
 533         kobject_put(bat_priv->mesh_obj);
 534         bat_priv->mesh_obj = NULL;
 535 out:
 536         return -ENOMEM;
 537 }
 538
 539 void batadv_sysfs_del_meshif(struct net_device *dev)
 540 {
 541         struct bat_priv *bat_priv = netdev_priv(dev);
 542         struct bat_attribute **bat_attr;
 543
 544         for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr)
 545                 sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
 546
 547         kobject_put(bat_priv->mesh_obj);
 548         bat_priv->mesh_obj = NULL;
 549 }
 550
 551 static ssize_t batadv_show_mesh_iface(struct kobject *kobj,
 552                                       struct attribute *attr, char *buff)
 553 {
 554         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 555         struct hard_iface *hard_iface = batadv_hardif_get_by_netdev(net_dev);
 556         ssize_t length;
 557
 558         if (!hard_iface)
 559                 return 0;
 560
 561         length = sprintf(buff, "%s\n", hard_iface->if_status == IF_NOT_IN_USE ?
 562                          "none" : hard_iface->soft_iface->name);
 563
 564         batadv_hardif_free_ref(hard_iface);
 565
 566         return length;
 567 }
 568
 569 static ssize_t batadv_store_mesh_iface(struct kobject *kobj,
 570                                        struct attribute *attr, char *buff,
 571                                        size_t count)
 572 {
 573         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 574         struct hard_iface *hard_iface = batadv_hardif_get_by_netdev(net_dev);
 575         int status_tmp = -1;
 576         int ret = count;
 577
 578         if (!hard_iface)
 579                 return count;
 580
 581         if (buff[count - 1] == '\n')
 582                 buff[count - 1] = '\0';
 583
 584         if (strlen(buff) >= IFNAMSIZ) {
 585                 pr_err("Invalid parameter for 'mesh_iface' setting received: interface name too long '%s'\n",
 586                        buff);
 587                 batadv_hardif_free_ref(hard_iface);
 588                 return -EINVAL;
 589         }
 590
 591         if (strncmp(buff, "none", 4) == 0)
 592                 status_tmp = IF_NOT_IN_USE;
 593         else
 594                 status_tmp = IF_I_WANT_YOU;
 595
 596         if (hard_iface->if_status == status_tmp)
 597                 goto out;
 598
 599         if ((hard_iface->soft_iface) &&
 600             (strncmp(hard_iface->soft_iface->name, buff, IFNAMSIZ) == 0))
 601                 goto out;
 602
 603         if (!rtnl_trylock()) {
 604                 ret = -ERESTARTSYS;
 605                 goto out;
 606         }
 607
 608         if (status_tmp == IF_NOT_IN_USE) {
 609                 batadv_hardif_disable_interface(hard_iface);
 610                 goto unlock;
 611         }
 612
 613         /* if the interface already is in use */
 614         if (hard_iface->if_status != IF_NOT_IN_USE)
 615                 batadv_hardif_disable_interface(hard_iface);
 616
 617         ret = batadv_hardif_enable_interface(hard_iface, buff);
 618
 619 unlock:
 620         rtnl_unlock();
 621 out:
 622         batadv_hardif_free_ref(hard_iface);
 623         return ret;
 624 }
 625
 626 static ssize_t batadv_show_iface_status(struct kobject *kobj,
 627                                         struct attribute *attr, char *buff)
 628 {
 629         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 630         struct hard_iface *hard_iface = batadv_hardif_get_by_netdev(net_dev);
 631         ssize_t length;
 632
 633         if (!hard_iface)
 634                 return 0;
 635
 636         switch (hard_iface->if_status) {
 637         case IF_TO_BE_REMOVED:
 638                 length = sprintf(buff, "disabling\n");
 639                 break;
 640         case IF_INACTIVE:
 641                 length = sprintf(buff, "inactive\n");
 642                 break;
 643         case IF_ACTIVE:
 644                 length = sprintf(buff, "active\n");
 645                 break;
 646         case IF_TO_BE_ACTIVATED:
 647                 length = sprintf(buff, "enabling\n");
 648                 break;
 649         case IF_NOT_IN_USE:
 650         default:
 651                 length = sprintf(buff, "not in use\n");
 652                 break;
 653         }
 654
 655         batadv_hardif_free_ref(hard_iface);
 656
 657         return length;
 658 }
 659
 660 static BATADV_ATTR(mesh_iface, S_IRUGO | S_IWUSR, batadv_show_mesh_iface,
 661                    batadv_store_mesh_iface);
 662 static BATADV_ATTR(iface_status, S_IRUGO, batadv_show_iface_status, NULL);
 663
 664 static struct bat_attribute *batadv_batman_attrs[] = {
 665         &batadv_attr_mesh_iface,
 666         &batadv_attr_iface_status,
 667         NULL,
 668 };
 669
 670 int batadv_sysfs_add_hardif(struct kobject **hardif_obj, struct net_device *dev)
 671 {
 672         struct kobject *hardif_kobject = &dev->dev.kobj;
 673         struct bat_attribute **bat_attr;
 674         int err;
 675
 676         *hardif_obj = kobject_create_and_add(SYSFS_IF_BAT_SUBDIR,
 677                                                     hardif_kobject);
 678
 679         if (!*hardif_obj) {
 680                 batadv_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
 681                            SYSFS_IF_BAT_SUBDIR);
 682                 goto out;
 683         }
 684
 685         for (bat_attr = batadv_batman_attrs; *bat_attr; ++bat_attr) {
 686                 err = sysfs_create_file(*hardif_obj, &((*bat_attr)->attr));
 687                 if (err) {
 688                         batadv_err(dev, "Can't add sysfs file: %s/%s/%s\n",
 689                                    dev->name, SYSFS_IF_BAT_SUBDIR,
 690                                    ((*bat_attr)->attr).name);
 691                         goto rem_attr;
 692                 }
 693         }
 694
 695         return 0;
 696
 697 rem_attr:
 698         for (bat_attr = batadv_batman_attrs; *bat_attr; ++bat_attr)
 699                 sysfs_remove_file(*hardif_obj, &((*bat_attr)->attr));
 700 out:
 701         return -ENOMEM;
 702 }
 703
 704 void batadv_sysfs_del_hardif(struct kobject **hardif_obj)
 705 {
 706         kobject_put(*hardif_obj);
 707         *hardif_obj = NULL;
 708 }
 709
 710 int batadv_throw_uevent(struct bat_priv *bat_priv, enum uev_type type,
 711                         enum uev_action action, const char *data)
 712 {
 713         int ret = -ENOMEM;
 714         struct hard_iface *primary_if = NULL;
 715         struct kobject *bat_kobj;
 716         char *uevent_env[4] = { NULL, NULL, NULL, NULL };
 717
 718         primary_if = batadv_primary_if_get_selected(bat_priv);
 719         if (!primary_if)
 720                 goto out;
 721
 722         bat_kobj = &primary_if->soft_iface->dev.kobj;
 723
 724         uevent_env[0] = kmalloc(strlen(BATADV_UEV_TYPE_VAR) +
 725                                 strlen(batadv_uev_type_str[type]) + 1,
 726                                 GFP_ATOMIC);
 727         if (!uevent_env[0])
 728                 goto out;
 729
 730         sprintf(uevent_env[0], "%s%s", BATADV_UEV_TYPE_VAR,
 731                 batadv_uev_type_str[type]);
 732
 733         uevent_env[1] = kmalloc(strlen(BATADV_UEV_ACTION_VAR) +
 734                                 strlen(batadv_uev_action_str[action]) + 1,
 735                                 GFP_ATOMIC);
 736         if (!uevent_env[1])
 737                 goto out;
 738
 739         sprintf(uevent_env[1], "%s%s", BATADV_UEV_ACTION_VAR,
 740                 batadv_uev_action_str[action]);
 741
 742         /* If the event is DEL, ignore the data field */
 743         if (action != UEV_DEL) {
 744                 uevent_env[2] = kmalloc(strlen(BATADV_UEV_DATA_VAR) +
 745                                         strlen(data) + 1, GFP_ATOMIC);
 746                 if (!uevent_env[2])
 747                         goto out;
 748
 749                 sprintf(uevent_env[2], "%s%s", BATADV_UEV_DATA_VAR, data);
 750         }
 751
 752         ret = kobject_uevent_env(bat_kobj, KOBJ_CHANGE, uevent_env);
 753 out:
 754         kfree(uevent_env[0]);
 755         kfree(uevent_env[1]);
 756         kfree(uevent_env[2]);
 757
 758         if (primary_if)
 759                 batadv_hardif_free_ref(primary_if);
 760
 761         if (ret)
 762                 batadv_dbg(DBG_BATMAN, bat_priv,
 763                            "Impossible to send uevent for (%s,%s,%s) event (err: %d)\n",
 764                            batadv_uev_type_str[type],
 765                            batadv_uev_action_str[action],
 766                            (action == UEV_DEL ? "NULL" : data), ret);
 767         return ret;
 768 }