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",
 365                                         BATADV_GW_MODE_CLIENT_NAME);
 366                 break;
 367         case GW_MODE_SERVER:
 368                 bytes_written = sprintf(buff, "%s\n",
 369                                         BATADV_GW_MODE_SERVER_NAME);
 370                 break;
 371         default:
 372                 bytes_written = sprintf(buff, "%s\n",
 373                                         BATADV_GW_MODE_OFF_NAME);
 374                 break;
 375         }
 376
 377         return bytes_written;
 378 }
 379
 380 static ssize_t batadv_store_gw_mode(struct kobject *kobj,
 381                                     struct attribute *attr, char *buff,
 382                                     size_t count)
 383 {
 384         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 385         struct bat_priv *bat_priv = netdev_priv(net_dev);
 386         char *curr_gw_mode_str;
 387         int gw_mode_tmp = -1;
 388
 389         if (buff[count - 1] == '\n')
 390                 buff[count - 1] = '\0';
 391
 392         if (strncmp(buff, BATADV_GW_MODE_OFF_NAME,
 393                     strlen(BATADV_GW_MODE_OFF_NAME)) == 0)
 394                 gw_mode_tmp = GW_MODE_OFF;
 395
 396         if (strncmp(buff, BATADV_GW_MODE_CLIENT_NAME,
 397                     strlen(BATADV_GW_MODE_CLIENT_NAME)) == 0)
 398                 gw_mode_tmp = GW_MODE_CLIENT;
 399
 400         if (strncmp(buff, BATADV_GW_MODE_SERVER_NAME,
 401                     strlen(BATADV_GW_MODE_SERVER_NAME)) == 0)
 402                 gw_mode_tmp = GW_MODE_SERVER;
 403
 404         if (gw_mode_tmp < 0) {
 405                 batadv_info(net_dev,
 406                             "Invalid parameter for 'gw mode' setting received: %s\n",
 407                             buff);
 408                 return -EINVAL;
 409         }
 410
 411         if (atomic_read(&bat_priv->gw_mode) == gw_mode_tmp)
 412                 return count;
 413
 414         switch (atomic_read(&bat_priv->gw_mode)) {
 415         case GW_MODE_CLIENT:
 416                 curr_gw_mode_str = BATADV_GW_MODE_CLIENT_NAME;
 417                 break;
 418         case GW_MODE_SERVER:
 419                 curr_gw_mode_str = BATADV_GW_MODE_SERVER_NAME;
 420                 break;
 421         default:
 422                 curr_gw_mode_str = BATADV_GW_MODE_OFF_NAME;
 423                 break;
 424         }
 425
 426         batadv_info(net_dev, "Changing gw mode from: %s to: %s\n",
 427                     curr_gw_mode_str, buff);
 428
 429         batadv_gw_deselect(bat_priv);
 430         atomic_set(&bat_priv->gw_mode, (unsigned int)gw_mode_tmp);
 431         return count;
 432 }
 433
 434 static ssize_t batadv_show_gw_bwidth(struct kobject *kobj,
 435                                      struct attribute *attr, char *buff)
 436 {
 437         struct bat_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 438         int down, up;
 439         int gw_bandwidth = atomic_read(&bat_priv->gw_bandwidth);
 440
 441         batadv_gw_bandwidth_to_kbit(gw_bandwidth, &down, &up);
 442         return sprintf(buff, "%i%s/%i%s\n",
 443                        (down > 2048 ? down / 1024 : down),
 444                        (down > 2048 ? "MBit" : "KBit"),
 445                        (up > 2048 ? up / 1024 : up),
 446                        (up > 2048 ? "MBit" : "KBit"));
 447 }
 448
 449 static ssize_t batadv_store_gw_bwidth(struct kobject *kobj,
 450                                       struct attribute *attr, char *buff,
 451                                       size_t count)
 452 {
 453         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 454
 455         if (buff[count - 1] == '\n')
 456                 buff[count - 1] = '\0';
 457
 458         return batadv_gw_bandwidth_set(net_dev, buff, count);
 459 }
 460
 461 BATADV_ATTR_SIF_BOOL(aggregated_ogms, S_IRUGO | S_IWUSR, NULL);
 462 BATADV_ATTR_SIF_BOOL(bonding, S_IRUGO | S_IWUSR, NULL);
 463 #ifdef CONFIG_BATMAN_ADV_BLA
 464 BATADV_ATTR_SIF_BOOL(bridge_loop_avoidance, S_IRUGO | S_IWUSR, NULL);
 465 #endif
 466 BATADV_ATTR_SIF_BOOL(fragmentation, S_IRUGO | S_IWUSR, batadv_update_min_mtu);
 467 BATADV_ATTR_SIF_BOOL(ap_isolation, S_IRUGO | S_IWUSR, NULL);
 468 static BATADV_ATTR(vis_mode, S_IRUGO | S_IWUSR, batadv_show_vis_mode,
 469                    batadv_store_vis_mode);
 470 static BATADV_ATTR(routing_algo, S_IRUGO, batadv_show_bat_algo, NULL);
 471 static BATADV_ATTR(gw_mode, S_IRUGO | S_IWUSR, batadv_show_gw_mode,
 472                    batadv_store_gw_mode);
 473 BATADV_ATTR_SIF_UINT(orig_interval, S_IRUGO | S_IWUSR, 2 * JITTER, INT_MAX,
 474                      NULL);
 475 BATADV_ATTR_SIF_UINT(hop_penalty, S_IRUGO | S_IWUSR, 0, TQ_MAX_VALUE, NULL);
 476 BATADV_ATTR_SIF_UINT(gw_sel_class, S_IRUGO | S_IWUSR, 1, TQ_MAX_VALUE,
 477                      batadv_post_gw_deselect);
 478 static BATADV_ATTR(gw_bandwidth, S_IRUGO | S_IWUSR, batadv_show_gw_bwidth,
 479                    batadv_store_gw_bwidth);
 480 #ifdef CONFIG_BATMAN_ADV_DEBUG
 481 BATADV_ATTR_SIF_UINT(log_level, S_IRUGO | S_IWUSR, 0, DBG_ALL, NULL);
 482 #endif
 483
 484 static struct bat_attribute *batadv_mesh_attrs[] = {
 485         &batadv_attr_aggregated_ogms,
 486         &batadv_attr_bonding,
 487 #ifdef CONFIG_BATMAN_ADV_BLA
 488         &batadv_attr_bridge_loop_avoidance,
 489 #endif
 490         &batadv_attr_fragmentation,
 491         &batadv_attr_ap_isolation,
 492         &batadv_attr_vis_mode,
 493         &batadv_attr_routing_algo,
 494         &batadv_attr_gw_mode,
 495         &batadv_attr_orig_interval,
 496         &batadv_attr_hop_penalty,
 497         &batadv_attr_gw_sel_class,
 498         &batadv_attr_gw_bandwidth,
 499 #ifdef CONFIG_BATMAN_ADV_DEBUG
 500         &batadv_attr_log_level,
 501 #endif
 502         NULL,
 503 };
 504
 505 int batadv_sysfs_add_meshif(struct net_device *dev)
 506 {
 507         struct kobject *batif_kobject = &dev->dev.kobj;
 508         struct bat_priv *bat_priv = netdev_priv(dev);
 509         struct bat_attribute **bat_attr;
 510         int err;
 511
 512         bat_priv->mesh_obj = kobject_create_and_add(BATADV_SYSFS_IF_MESH_SUBDIR,
 513                                                     batif_kobject);
 514         if (!bat_priv->mesh_obj) {
 515                 batadv_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
 516                            BATADV_SYSFS_IF_MESH_SUBDIR);
 517                 goto out;
 518         }
 519
 520         for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr) {
 521                 err = sysfs_create_file(bat_priv->mesh_obj,
 522                                         &((*bat_attr)->attr));
 523                 if (err) {
 524                         batadv_err(dev, "Can't add sysfs file: %s/%s/%s\n",
 525                                    dev->name, BATADV_SYSFS_IF_MESH_SUBDIR,
 526                                    ((*bat_attr)->attr).name);
 527                         goto rem_attr;
 528                 }
 529         }
 530
 531         return 0;
 532
 533 rem_attr:
 534         for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr)
 535                 sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
 536
 537         kobject_put(bat_priv->mesh_obj);
 538         bat_priv->mesh_obj = NULL;
 539 out:
 540         return -ENOMEM;
 541 }
 542
 543 void batadv_sysfs_del_meshif(struct net_device *dev)
 544 {
 545         struct bat_priv *bat_priv = netdev_priv(dev);
 546         struct bat_attribute **bat_attr;
 547
 548         for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr)
 549                 sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
 550
 551         kobject_put(bat_priv->mesh_obj);
 552         bat_priv->mesh_obj = NULL;
 553 }
 554
 555 static ssize_t batadv_show_mesh_iface(struct kobject *kobj,
 556                                       struct attribute *attr, char *buff)
 557 {
 558         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 559         struct hard_iface *hard_iface = batadv_hardif_get_by_netdev(net_dev);
 560         ssize_t length;
 561
 562         if (!hard_iface)
 563                 return 0;
 564
 565         length = sprintf(buff, "%s\n", hard_iface->if_status == IF_NOT_IN_USE ?
 566                          "none" : hard_iface->soft_iface->name);
 567
 568         batadv_hardif_free_ref(hard_iface);
 569
 570         return length;
 571 }
 572
 573 static ssize_t batadv_store_mesh_iface(struct kobject *kobj,
 574                                        struct attribute *attr, char *buff,
 575                                        size_t count)
 576 {
 577         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 578         struct hard_iface *hard_iface = batadv_hardif_get_by_netdev(net_dev);
 579         int status_tmp = -1;
 580         int ret = count;
 581
 582         if (!hard_iface)
 583                 return count;
 584
 585         if (buff[count - 1] == '\n')
 586                 buff[count - 1] = '\0';
 587
 588         if (strlen(buff) >= IFNAMSIZ) {
 589                 pr_err("Invalid parameter for 'mesh_iface' setting received: interface name too long '%s'\n",
 590                        buff);
 591                 batadv_hardif_free_ref(hard_iface);
 592                 return -EINVAL;
 593         }
 594
 595         if (strncmp(buff, "none", 4) == 0)
 596                 status_tmp = IF_NOT_IN_USE;
 597         else
 598                 status_tmp = IF_I_WANT_YOU;
 599
 600         if (hard_iface->if_status == status_tmp)
 601                 goto out;
 602
 603         if ((hard_iface->soft_iface) &&
 604             (strncmp(hard_iface->soft_iface->name, buff, IFNAMSIZ) == 0))
 605                 goto out;
 606
 607         if (!rtnl_trylock()) {
 608                 ret = -ERESTARTSYS;
 609                 goto out;
 610         }
 611
 612         if (status_tmp == IF_NOT_IN_USE) {
 613                 batadv_hardif_disable_interface(hard_iface);
 614                 goto unlock;
 615         }
 616
 617         /* if the interface already is in use */
 618         if (hard_iface->if_status != IF_NOT_IN_USE)
 619                 batadv_hardif_disable_interface(hard_iface);
 620
 621         ret = batadv_hardif_enable_interface(hard_iface, buff);
 622
 623 unlock:
 624         rtnl_unlock();
 625 out:
 626         batadv_hardif_free_ref(hard_iface);
 627         return ret;
 628 }
 629
 630 static ssize_t batadv_show_iface_status(struct kobject *kobj,
 631                                         struct attribute *attr, char *buff)
 632 {
 633         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 634         struct hard_iface *hard_iface = batadv_hardif_get_by_netdev(net_dev);
 635         ssize_t length;
 636
 637         if (!hard_iface)
 638                 return 0;
 639
 640         switch (hard_iface->if_status) {
 641         case IF_TO_BE_REMOVED:
 642                 length = sprintf(buff, "disabling\n");
 643                 break;
 644         case IF_INACTIVE:
 645                 length = sprintf(buff, "inactive\n");
 646                 break;
 647         case IF_ACTIVE:
 648                 length = sprintf(buff, "active\n");
 649                 break;
 650         case IF_TO_BE_ACTIVATED:
 651                 length = sprintf(buff, "enabling\n");
 652                 break;
 653         case IF_NOT_IN_USE:
 654         default:
 655                 length = sprintf(buff, "not in use\n");
 656                 break;
 657         }
 658
 659         batadv_hardif_free_ref(hard_iface);
 660
 661         return length;
 662 }
 663
 664 static BATADV_ATTR(mesh_iface, S_IRUGO | S_IWUSR, batadv_show_mesh_iface,
 665                    batadv_store_mesh_iface);
 666 static BATADV_ATTR(iface_status, S_IRUGO, batadv_show_iface_status, NULL);
 667
 668 static struct bat_attribute *batadv_batman_attrs[] = {
 669         &batadv_attr_mesh_iface,
 670         &batadv_attr_iface_status,
 671         NULL,
 672 };
 673
 674 int batadv_sysfs_add_hardif(struct kobject **hardif_obj, struct net_device *dev)
 675 {
 676         struct kobject *hardif_kobject = &dev->dev.kobj;
 677         struct bat_attribute **bat_attr;
 678         int err;
 679
 680         *hardif_obj = kobject_create_and_add(BATADV_SYSFS_IF_BAT_SUBDIR,
 681                                              hardif_kobject);
 682
 683         if (!*hardif_obj) {
 684                 batadv_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
 685                            BATADV_SYSFS_IF_BAT_SUBDIR);
 686                 goto out;
 687         }
 688
 689         for (bat_attr = batadv_batman_attrs; *bat_attr; ++bat_attr) {
 690                 err = sysfs_create_file(*hardif_obj, &((*bat_attr)->attr));
 691                 if (err) {
 692                         batadv_err(dev, "Can't add sysfs file: %s/%s/%s\n",
 693                                    dev->name, BATADV_SYSFS_IF_BAT_SUBDIR,
 694                                    ((*bat_attr)->attr).name);
 695                         goto rem_attr;
 696                 }
 697         }
 698
 699         return 0;
 700
 701 rem_attr:
 702         for (bat_attr = batadv_batman_attrs; *bat_attr; ++bat_attr)
 703                 sysfs_remove_file(*hardif_obj, &((*bat_attr)->attr));
 704 out:
 705         return -ENOMEM;
 706 }
 707
 708 void batadv_sysfs_del_hardif(struct kobject **hardif_obj)
 709 {
 710         kobject_put(*hardif_obj);
 711         *hardif_obj = NULL;
 712 }
 713
 714 int batadv_throw_uevent(struct bat_priv *bat_priv, enum uev_type type,
 715                         enum uev_action action, const char *data)
 716 {
 717         int ret = -ENOMEM;
 718         struct hard_iface *primary_if = NULL;
 719         struct kobject *bat_kobj;
 720         char *uevent_env[4] = { NULL, NULL, NULL, NULL };
 721
 722         primary_if = batadv_primary_if_get_selected(bat_priv);
 723         if (!primary_if)
 724                 goto out;
 725
 726         bat_kobj = &primary_if->soft_iface->dev.kobj;
 727
 728         uevent_env[0] = kmalloc(strlen(BATADV_UEV_TYPE_VAR) +
 729                                 strlen(batadv_uev_type_str[type]) + 1,
 730                                 GFP_ATOMIC);
 731         if (!uevent_env[0])
 732                 goto out;
 733
 734         sprintf(uevent_env[0], "%s%s", BATADV_UEV_TYPE_VAR,
 735                 batadv_uev_type_str[type]);
 736
 737         uevent_env[1] = kmalloc(strlen(BATADV_UEV_ACTION_VAR) +
 738                                 strlen(batadv_uev_action_str[action]) + 1,
 739                                 GFP_ATOMIC);
 740         if (!uevent_env[1])
 741                 goto out;
 742
 743         sprintf(uevent_env[1], "%s%s", BATADV_UEV_ACTION_VAR,
 744                 batadv_uev_action_str[action]);
 745
 746         /* If the event is DEL, ignore the data field */
 747         if (action != UEV_DEL) {
 748                 uevent_env[2] = kmalloc(strlen(BATADV_UEV_DATA_VAR) +
 749                                         strlen(data) + 1, GFP_ATOMIC);
 750                 if (!uevent_env[2])
 751                         goto out;
 752
 753                 sprintf(uevent_env[2], "%s%s", BATADV_UEV_DATA_VAR, data);
 754         }
 755
 756         ret = kobject_uevent_env(bat_kobj, KOBJ_CHANGE, uevent_env);
 757 out:
 758         kfree(uevent_env[0]);
 759         kfree(uevent_env[1]);
 760         kfree(uevent_env[2]);
 761
 762         if (primary_if)
 763                 batadv_hardif_free_ref(primary_if);
 764
 765         if (ret)
 766                 batadv_dbg(DBG_BATMAN, bat_priv,
 767                            "Impossible to send uevent for (%s,%s,%s) event (err: %d)\n",
 768                            batadv_uev_type_str[type],
 769                            batadv_uev_action_str[action],
 770                            (action == UEV_DEL ? "NULL" : data), ret);
 771         return ret;
 772 }