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