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         const char *mode;
 287
 288         if (vis_mode == BATADV_VIS_TYPE_CLIENT_UPDATE)
 289                 mode = "client";
 290         else
 291                 mode = "server";
 292
 293         return sprintf(buff, "%s\n", mode);
 294 }
 295
 296 static ssize_t batadv_store_vis_mode(struct kobject *kobj,
 297                                      struct attribute *attr, char *buff,
 298                                      size_t count)
 299 {
 300         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 301         struct bat_priv *bat_priv = netdev_priv(net_dev);
 302         unsigned long val;
 303         int ret, vis_mode_tmp = -1;
 304         const char *old_mode, *new_mode;
 305
 306         ret = kstrtoul(buff, 10, &val);
 307
 308         if (((count == 2) && (!ret) &&
 309              (val == BATADV_VIS_TYPE_CLIENT_UPDATE)) ||
 310             (strncmp(buff, "client", 6) == 0) ||
 311             (strncmp(buff, "off", 3) == 0))
 312                 vis_mode_tmp = BATADV_VIS_TYPE_CLIENT_UPDATE;
 313
 314         if (((count == 2) && (!ret) &&
 315              (val == BATADV_VIS_TYPE_SERVER_SYNC)) ||
 316             (strncmp(buff, "server", 6) == 0))
 317                 vis_mode_tmp = BATADV_VIS_TYPE_SERVER_SYNC;
 318
 319         if (vis_mode_tmp < 0) {
 320                 if (buff[count - 1] == '\n')
 321                         buff[count - 1] = '\0';
 322
 323                 batadv_info(net_dev,
 324                             "Invalid parameter for 'vis mode' setting received: %s\n",
 325                             buff);
 326                 return -EINVAL;
 327         }
 328
 329         if (atomic_read(&bat_priv->vis_mode) == vis_mode_tmp)
 330                 return count;
 331
 332         if (atomic_read(&bat_priv->vis_mode) == BATADV_VIS_TYPE_CLIENT_UPDATE)
 333                 old_mode =  "client";
 334         else
 335                 old_mode = "server";
 336
 337         if (vis_mode_tmp == BATADV_VIS_TYPE_CLIENT_UPDATE)
 338                 new_mode =  "client";
 339         else
 340                 new_mode = "server";
 341
 342         batadv_info(net_dev, "Changing vis mode from: %s to: %s\n", old_mode,
 343                     new_mode);
 344
 345         atomic_set(&bat_priv->vis_mode, (unsigned int)vis_mode_tmp);
 346         return count;
 347 }
 348
 349 static ssize_t batadv_show_bat_algo(struct kobject *kobj,
 350                                     struct attribute *attr, char *buff)
 351 {
 352         struct bat_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 353         return sprintf(buff, "%s\n", bat_priv->bat_algo_ops->name);
 354 }
 355
 356 static void batadv_post_gw_deselect(struct net_device *net_dev)
 357 {
 358         struct bat_priv *bat_priv = netdev_priv(net_dev);
 359         batadv_gw_deselect(bat_priv);
 360 }
 361
 362 static ssize_t batadv_show_gw_mode(struct kobject *kobj, struct attribute *attr,
 363                                    char *buff)
 364 {
 365         struct bat_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 366         int bytes_written;
 367
 368         switch (atomic_read(&bat_priv->gw_mode)) {
 369         case BATADV_GW_MODE_CLIENT:
 370                 bytes_written = sprintf(buff, "%s\n",
 371                                         BATADV_GW_MODE_CLIENT_NAME);
 372                 break;
 373         case BATADV_GW_MODE_SERVER:
 374                 bytes_written = sprintf(buff, "%s\n",
 375                                         BATADV_GW_MODE_SERVER_NAME);
 376                 break;
 377         default:
 378                 bytes_written = sprintf(buff, "%s\n",
 379                                         BATADV_GW_MODE_OFF_NAME);
 380                 break;
 381         }
 382
 383         return bytes_written;
 384 }
 385
 386 static ssize_t batadv_store_gw_mode(struct kobject *kobj,
 387                                     struct attribute *attr, char *buff,
 388                                     size_t count)
 389 {
 390         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 391         struct bat_priv *bat_priv = netdev_priv(net_dev);
 392         char *curr_gw_mode_str;
 393         int gw_mode_tmp = -1;
 394
 395         if (buff[count - 1] == '\n')
 396                 buff[count - 1] = '\0';
 397
 398         if (strncmp(buff, BATADV_GW_MODE_OFF_NAME,
 399                     strlen(BATADV_GW_MODE_OFF_NAME)) == 0)
 400                 gw_mode_tmp = BATADV_GW_MODE_OFF;
 401
 402         if (strncmp(buff, BATADV_GW_MODE_CLIENT_NAME,
 403                     strlen(BATADV_GW_MODE_CLIENT_NAME)) == 0)
 404                 gw_mode_tmp = BATADV_GW_MODE_CLIENT;
 405
 406         if (strncmp(buff, BATADV_GW_MODE_SERVER_NAME,
 407                     strlen(BATADV_GW_MODE_SERVER_NAME)) == 0)
 408                 gw_mode_tmp = BATADV_GW_MODE_SERVER;
 409
 410         if (gw_mode_tmp < 0) {
 411                 batadv_info(net_dev,
 412                             "Invalid parameter for 'gw mode' setting received: %s\n",
 413                             buff);
 414                 return -EINVAL;
 415         }
 416
 417         if (atomic_read(&bat_priv->gw_mode) == gw_mode_tmp)
 418                 return count;
 419
 420         switch (atomic_read(&bat_priv->gw_mode)) {
 421         case BATADV_GW_MODE_CLIENT:
 422                 curr_gw_mode_str = BATADV_GW_MODE_CLIENT_NAME;
 423                 break;
 424         case BATADV_GW_MODE_SERVER:
 425                 curr_gw_mode_str = BATADV_GW_MODE_SERVER_NAME;
 426                 break;
 427         default:
 428                 curr_gw_mode_str = BATADV_GW_MODE_OFF_NAME;
 429                 break;
 430         }
 431
 432         batadv_info(net_dev, "Changing gw mode from: %s to: %s\n",
 433                     curr_gw_mode_str, buff);
 434
 435         batadv_gw_deselect(bat_priv);
 436         atomic_set(&bat_priv->gw_mode, (unsigned int)gw_mode_tmp);
 437         return count;
 438 }
 439
 440 static ssize_t batadv_show_gw_bwidth(struct kobject *kobj,
 441                                      struct attribute *attr, char *buff)
 442 {
 443         struct bat_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 444         int down, up;
 445         int gw_bandwidth = atomic_read(&bat_priv->gw_bandwidth);
 446
 447         batadv_gw_bandwidth_to_kbit(gw_bandwidth, &down, &up);
 448         return sprintf(buff, "%i%s/%i%s\n",
 449                        (down > 2048 ? down / 1024 : down),
 450                        (down > 2048 ? "MBit" : "KBit"),
 451                        (up > 2048 ? up / 1024 : up),
 452                        (up > 2048 ? "MBit" : "KBit"));
 453 }
 454
 455 static ssize_t batadv_store_gw_bwidth(struct kobject *kobj,
 456                                       struct attribute *attr, char *buff,
 457                                       size_t count)
 458 {
 459         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 460
 461         if (buff[count - 1] == '\n')
 462                 buff[count - 1] = '\0';
 463
 464         return batadv_gw_bandwidth_set(net_dev, buff, count);
 465 }
 466
 467 BATADV_ATTR_SIF_BOOL(aggregated_ogms, S_IRUGO | S_IWUSR, NULL);
 468 BATADV_ATTR_SIF_BOOL(bonding, S_IRUGO | S_IWUSR, NULL);
 469 #ifdef CONFIG_BATMAN_ADV_BLA
 470 BATADV_ATTR_SIF_BOOL(bridge_loop_avoidance, S_IRUGO | S_IWUSR, NULL);
 471 #endif
 472 BATADV_ATTR_SIF_BOOL(fragmentation, S_IRUGO | S_IWUSR, batadv_update_min_mtu);
 473 BATADV_ATTR_SIF_BOOL(ap_isolation, S_IRUGO | S_IWUSR, NULL);
 474 static BATADV_ATTR(vis_mode, S_IRUGO | S_IWUSR, batadv_show_vis_mode,
 475                    batadv_store_vis_mode);
 476 static BATADV_ATTR(routing_algo, S_IRUGO, batadv_show_bat_algo, NULL);
 477 static BATADV_ATTR(gw_mode, S_IRUGO | S_IWUSR, batadv_show_gw_mode,
 478                    batadv_store_gw_mode);
 479 BATADV_ATTR_SIF_UINT(orig_interval, S_IRUGO | S_IWUSR, 2 * BATADV_JITTER,
 480                      INT_MAX, NULL);
 481 BATADV_ATTR_SIF_UINT(hop_penalty, S_IRUGO | S_IWUSR, 0, BATADV_TQ_MAX_VALUE,
 482                      NULL);
 483 BATADV_ATTR_SIF_UINT(gw_sel_class, S_IRUGO | S_IWUSR, 1, BATADV_TQ_MAX_VALUE,
 484                      batadv_post_gw_deselect);
 485 static BATADV_ATTR(gw_bandwidth, S_IRUGO | S_IWUSR, batadv_show_gw_bwidth,
 486                    batadv_store_gw_bwidth);
 487 #ifdef CONFIG_BATMAN_ADV_DEBUG
 488 BATADV_ATTR_SIF_UINT(log_level, S_IRUGO | S_IWUSR, 0, DBG_ALL, NULL);
 489 #endif
 490
 491 static struct bat_attribute *batadv_mesh_attrs[] = {
 492         &batadv_attr_aggregated_ogms,
 493         &batadv_attr_bonding,
 494 #ifdef CONFIG_BATMAN_ADV_BLA
 495         &batadv_attr_bridge_loop_avoidance,
 496 #endif
 497         &batadv_attr_fragmentation,
 498         &batadv_attr_ap_isolation,
 499         &batadv_attr_vis_mode,
 500         &batadv_attr_routing_algo,
 501         &batadv_attr_gw_mode,
 502         &batadv_attr_orig_interval,
 503         &batadv_attr_hop_penalty,
 504         &batadv_attr_gw_sel_class,
 505         &batadv_attr_gw_bandwidth,
 506 #ifdef CONFIG_BATMAN_ADV_DEBUG
 507         &batadv_attr_log_level,
 508 #endif
 509         NULL,
 510 };
 511
 512 int batadv_sysfs_add_meshif(struct net_device *dev)
 513 {
 514         struct kobject *batif_kobject = &dev->dev.kobj;
 515         struct bat_priv *bat_priv = netdev_priv(dev);
 516         struct bat_attribute **bat_attr;
 517         int err;
 518
 519         bat_priv->mesh_obj = kobject_create_and_add(BATADV_SYSFS_IF_MESH_SUBDIR,
 520                                                     batif_kobject);
 521         if (!bat_priv->mesh_obj) {
 522                 batadv_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
 523                            BATADV_SYSFS_IF_MESH_SUBDIR);
 524                 goto out;
 525         }
 526
 527         for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr) {
 528                 err = sysfs_create_file(bat_priv->mesh_obj,
 529                                         &((*bat_attr)->attr));
 530                 if (err) {
 531                         batadv_err(dev, "Can't add sysfs file: %s/%s/%s\n",
 532                                    dev->name, BATADV_SYSFS_IF_MESH_SUBDIR,
 533                                    ((*bat_attr)->attr).name);
 534                         goto rem_attr;
 535                 }
 536         }
 537
 538         return 0;
 539
 540 rem_attr:
 541         for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr)
 542                 sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
 543
 544         kobject_put(bat_priv->mesh_obj);
 545         bat_priv->mesh_obj = NULL;
 546 out:
 547         return -ENOMEM;
 548 }
 549
 550 void batadv_sysfs_del_meshif(struct net_device *dev)
 551 {
 552         struct bat_priv *bat_priv = netdev_priv(dev);
 553         struct bat_attribute **bat_attr;
 554
 555         for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr)
 556                 sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
 557
 558         kobject_put(bat_priv->mesh_obj);
 559         bat_priv->mesh_obj = NULL;
 560 }
 561
 562 static ssize_t batadv_show_mesh_iface(struct kobject *kobj,
 563                                       struct attribute *attr, char *buff)
 564 {
 565         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 566         struct hard_iface *hard_iface = batadv_hardif_get_by_netdev(net_dev);
 567         ssize_t length;
 568         const char *ifname;
 569
 570         if (!hard_iface)
 571                 return 0;
 572
 573         if (hard_iface->if_status == BATADV_IF_NOT_IN_USE)
 574                 ifname =  "none";
 575         else
 576                 ifname = hard_iface->soft_iface->name;
 577
 578         length = sprintf(buff, "%s\n", ifname);
 579
 580         batadv_hardif_free_ref(hard_iface);
 581
 582         return length;
 583 }
 584
 585 static ssize_t batadv_store_mesh_iface(struct kobject *kobj,
 586                                        struct attribute *attr, char *buff,
 587                                        size_t count)
 588 {
 589         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 590         struct hard_iface *hard_iface = batadv_hardif_get_by_netdev(net_dev);
 591         int status_tmp = -1;
 592         int ret = count;
 593
 594         if (!hard_iface)
 595                 return count;
 596
 597         if (buff[count - 1] == '\n')
 598                 buff[count - 1] = '\0';
 599
 600         if (strlen(buff) >= IFNAMSIZ) {
 601                 pr_err("Invalid parameter for 'mesh_iface' setting received: interface name too long '%s'\n",
 602                        buff);
 603                 batadv_hardif_free_ref(hard_iface);
 604                 return -EINVAL;
 605         }
 606
 607         if (strncmp(buff, "none", 4) == 0)
 608                 status_tmp = BATADV_IF_NOT_IN_USE;
 609         else
 610                 status_tmp = BATADV_IF_I_WANT_YOU;
 611
 612         if (hard_iface->if_status == status_tmp)
 613                 goto out;
 614
 615         if ((hard_iface->soft_iface) &&
 616             (strncmp(hard_iface->soft_iface->name, buff, IFNAMSIZ) == 0))
 617                 goto out;
 618
 619         if (!rtnl_trylock()) {
 620                 ret = -ERESTARTSYS;
 621                 goto out;
 622         }
 623
 624         if (status_tmp == BATADV_IF_NOT_IN_USE) {
 625                 batadv_hardif_disable_interface(hard_iface);
 626                 goto unlock;
 627         }
 628
 629         /* if the interface already is in use */
 630         if (hard_iface->if_status != BATADV_IF_NOT_IN_USE)
 631                 batadv_hardif_disable_interface(hard_iface);
 632
 633         ret = batadv_hardif_enable_interface(hard_iface, buff);
 634
 635 unlock:
 636         rtnl_unlock();
 637 out:
 638         batadv_hardif_free_ref(hard_iface);
 639         return ret;
 640 }
 641
 642 static ssize_t batadv_show_iface_status(struct kobject *kobj,
 643                                         struct attribute *attr, char *buff)
 644 {
 645         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 646         struct hard_iface *hard_iface = batadv_hardif_get_by_netdev(net_dev);
 647         ssize_t length;
 648
 649         if (!hard_iface)
 650                 return 0;
 651
 652         switch (hard_iface->if_status) {
 653         case BATADV_IF_TO_BE_REMOVED:
 654                 length = sprintf(buff, "disabling\n");
 655                 break;
 656         case BATADV_IF_INACTIVE:
 657                 length = sprintf(buff, "inactive\n");
 658                 break;
 659         case BATADV_IF_ACTIVE:
 660                 length = sprintf(buff, "active\n");
 661                 break;
 662         case BATADV_IF_TO_BE_ACTIVATED:
 663                 length = sprintf(buff, "enabling\n");
 664                 break;
 665         case BATADV_IF_NOT_IN_USE:
 666         default:
 667                 length = sprintf(buff, "not in use\n");
 668                 break;
 669         }
 670
 671         batadv_hardif_free_ref(hard_iface);
 672
 673         return length;
 674 }
 675
 676 static BATADV_ATTR(mesh_iface, S_IRUGO | S_IWUSR, batadv_show_mesh_iface,
 677                    batadv_store_mesh_iface);
 678 static BATADV_ATTR(iface_status, S_IRUGO, batadv_show_iface_status, NULL);
 679
 680 static struct bat_attribute *batadv_batman_attrs[] = {
 681         &batadv_attr_mesh_iface,
 682         &batadv_attr_iface_status,
 683         NULL,
 684 };
 685
 686 int batadv_sysfs_add_hardif(struct kobject **hardif_obj, struct net_device *dev)
 687 {
 688         struct kobject *hardif_kobject = &dev->dev.kobj;
 689         struct bat_attribute **bat_attr;
 690         int err;
 691
 692         *hardif_obj = kobject_create_and_add(BATADV_SYSFS_IF_BAT_SUBDIR,
 693                                              hardif_kobject);
 694
 695         if (!*hardif_obj) {
 696                 batadv_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
 697                            BATADV_SYSFS_IF_BAT_SUBDIR);
 698                 goto out;
 699         }
 700
 701         for (bat_attr = batadv_batman_attrs; *bat_attr; ++bat_attr) {
 702                 err = sysfs_create_file(*hardif_obj, &((*bat_attr)->attr));
 703                 if (err) {
 704                         batadv_err(dev, "Can't add sysfs file: %s/%s/%s\n",
 705                                    dev->name, BATADV_SYSFS_IF_BAT_SUBDIR,
 706                                    ((*bat_attr)->attr).name);
 707                         goto rem_attr;
 708                 }
 709         }
 710
 711         return 0;
 712
 713 rem_attr:
 714         for (bat_attr = batadv_batman_attrs; *bat_attr; ++bat_attr)
 715                 sysfs_remove_file(*hardif_obj, &((*bat_attr)->attr));
 716 out:
 717         return -ENOMEM;
 718 }
 719
 720 void batadv_sysfs_del_hardif(struct kobject **hardif_obj)
 721 {
 722         kobject_put(*hardif_obj);
 723         *hardif_obj = NULL;
 724 }
 725
 726 int batadv_throw_uevent(struct bat_priv *bat_priv, enum uev_type type,
 727                         enum uev_action action, const char *data)
 728 {
 729         int ret = -ENOMEM;
 730         struct hard_iface *primary_if = NULL;
 731         struct kobject *bat_kobj;
 732         char *uevent_env[4] = { NULL, NULL, NULL, NULL };
 733
 734         primary_if = batadv_primary_if_get_selected(bat_priv);
 735         if (!primary_if)
 736                 goto out;
 737
 738         bat_kobj = &primary_if->soft_iface->dev.kobj;
 739
 740         uevent_env[0] = kmalloc(strlen(BATADV_UEV_TYPE_VAR) +
 741                                 strlen(batadv_uev_type_str[type]) + 1,
 742                                 GFP_ATOMIC);
 743         if (!uevent_env[0])
 744                 goto out;
 745
 746         sprintf(uevent_env[0], "%s%s", BATADV_UEV_TYPE_VAR,
 747                 batadv_uev_type_str[type]);
 748
 749         uevent_env[1] = kmalloc(strlen(BATADV_UEV_ACTION_VAR) +
 750                                 strlen(batadv_uev_action_str[action]) + 1,
 751                                 GFP_ATOMIC);
 752         if (!uevent_env[1])
 753                 goto out;
 754
 755         sprintf(uevent_env[1], "%s%s", BATADV_UEV_ACTION_VAR,
 756                 batadv_uev_action_str[action]);
 757
 758         /* If the event is DEL, ignore the data field */
 759         if (action != UEV_DEL) {
 760                 uevent_env[2] = kmalloc(strlen(BATADV_UEV_DATA_VAR) +
 761                                         strlen(data) + 1, GFP_ATOMIC);
 762                 if (!uevent_env[2])
 763                         goto out;
 764
 765                 sprintf(uevent_env[2], "%s%s", BATADV_UEV_DATA_VAR, data);
 766         }
 767
 768         ret = kobject_uevent_env(bat_kobj, KOBJ_CHANGE, uevent_env);
 769 out:
 770         kfree(uevent_env[0]);
 771         kfree(uevent_env[1]);
 772         kfree(uevent_env[2]);
 773
 774         if (primary_if)
 775                 batadv_hardif_free_ref(primary_if);
 776
 777         if (ret)
 778                 batadv_dbg(DBG_BATMAN, bat_priv,
 779                            "Impossible to send uevent for (%s,%s,%s) event (err: %d)\n",
 780                            batadv_uev_type_str[type],
 781                            batadv_uev_action_str[action],
 782                            (action == UEV_DEL ? "NULL" : data), ret);
 783         return ret;
 784 }