net/batman-adv/sysfs.c

   1 /* Copyright (C) 2010-2016  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, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include "sysfs.h"
  19 #include "main.h"
  20
  21 #include <linux/atomic.h>
  22 #include <linux/compiler.h>
  23 #include <linux/device.h>
  24 #include <linux/errno.h>
  25 #include <linux/fs.h>
  26 #include <linux/if.h>
  27 #include <linux/if_vlan.h>
  28 #include <linux/kernel.h>
  29 #include <linux/kref.h>
  30 #include <linux/netdevice.h>
  31 #include <linux/printk.h>
  32 #include <linux/rculist.h>
  33 #include <linux/rcupdate.h>
  34 #include <linux/rtnetlink.h>
  35 #include <linux/slab.h>
  36 #include <linux/stat.h>
  37 #include <linux/stddef.h>
  38 #include <linux/string.h>
  39 #include <linux/stringify.h>
  40 #include <linux/workqueue.h>
  41
  42 #include "bridge_loop_avoidance.h"
  43 #include "distributed-arp-table.h"
  44 #include "gateway_client.h"
  45 #include "gateway_common.h"
  46 #include "hard-interface.h"
  47 #include "log.h"
  48 #include "network-coding.h"
  49 #include "packet.h"
  50 #include "soft-interface.h"
  51
  52 static struct net_device *batadv_kobj_to_netdev(struct kobject *obj)
  53 {
  54         struct device *dev = container_of(obj->parent, struct device, kobj);
  55
  56         return to_net_dev(dev);
  57 }
  58
  59 static struct batadv_priv *batadv_kobj_to_batpriv(struct kobject *obj)
  60 {
  61         struct net_device *net_dev = batadv_kobj_to_netdev(obj);
  62
  63         return netdev_priv(net_dev);
  64 }
  65
  66 /**
  67  * batadv_vlan_kobj_to_batpriv - convert a vlan kobj in the associated batpriv
  68  * @obj: kobject to covert
  69  *
  70  * Return: the associated batadv_priv struct.
  71  */
  72 static struct batadv_priv *batadv_vlan_kobj_to_batpriv(struct kobject *obj)
  73 {
  74         /* VLAN specific attributes are located in the root sysfs folder if they
  75          * refer to the untagged VLAN..
  76          */
  77         if (!strcmp(BATADV_SYSFS_IF_MESH_SUBDIR, obj->name))
  78                 return batadv_kobj_to_batpriv(obj);
  79
  80         /* ..while the attributes for the tagged vlans are located in
  81          * the in the corresponding "vlan%VID" subfolder
  82          */
  83         return batadv_kobj_to_batpriv(obj->parent);
  84 }
  85
  86 /**
  87  * batadv_kobj_to_vlan - convert a kobj in the associated softif_vlan struct
  88  * @bat_priv: the bat priv with all the soft interface information
  89  * @obj: kobject to covert
  90  *
  91  * Return: the associated softif_vlan struct if found, NULL otherwise.
  92  */
  93 static struct batadv_softif_vlan *
  94 batadv_kobj_to_vlan(struct batadv_priv *bat_priv, struct kobject *obj)
  95 {
  96         struct batadv_softif_vlan *vlan_tmp, *vlan = NULL;
  97
  98         rcu_read_lock();
  99         hlist_for_each_entry_rcu(vlan_tmp, &bat_priv->softif_vlan_list, list) {
 100                 if (vlan_tmp->kobj != obj)
 101                         continue;
 102
 103                 if (!kref_get_unless_zero(&vlan_tmp->refcount))
 104                         continue;
 105
 106                 vlan = vlan_tmp;
 107                 break;
 108         }
 109         rcu_read_unlock();
 110
 111         return vlan;
 112 }
 113
 114 #define BATADV_UEV_TYPE_VAR     "BATTYPE="
 115 #define BATADV_UEV_ACTION_VAR   "BATACTION="
 116 #define BATADV_UEV_DATA_VAR     "BATDATA="
 117
 118 static char *batadv_uev_action_str[] = {
 119         "add",
 120         "del",
 121         "change",
 122         "loopdetect",
 123 };
 124
 125 static char *batadv_uev_type_str[] = {
 126         "gw",
 127         "bla",
 128 };
 129
 130 /* Use this, if you have customized show and store functions for vlan attrs */
 131 #define BATADV_ATTR_VLAN(_name, _mode, _show, _store)   \
 132 struct batadv_attribute batadv_attr_vlan_##_name = {    \
 133         .attr = {.name = __stringify(_name),            \
 134                  .mode = _mode },                       \
 135         .show   = _show,                                \
 136         .store  = _store,                               \
 137 }
 138
 139 /* Use this, if you have customized show and store functions */
 140 #define BATADV_ATTR(_name, _mode, _show, _store)        \
 141 struct batadv_attribute batadv_attr_##_name = {         \
 142         .attr = {.name = __stringify(_name),            \
 143                  .mode = _mode },                       \
 144         .show   = _show,                                \
 145         .store  = _store,                               \
 146 }
 147
 148 #define BATADV_ATTR_SIF_STORE_BOOL(_name, _post_func)                   \
 149 ssize_t batadv_store_##_name(struct kobject *kobj,                      \
 150                              struct attribute *attr, char *buff,        \
 151                              size_t count)                              \
 152 {                                                                       \
 153         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);       \
 154         struct batadv_priv *bat_priv = netdev_priv(net_dev);            \
 155                                                                         \
 156         return __batadv_store_bool_attr(buff, count, _post_func, attr,  \
 157                                         &bat_priv->_name, net_dev);     \
 158 }
 159
 160 #define BATADV_ATTR_SIF_SHOW_BOOL(_name)                                \
 161 ssize_t batadv_show_##_name(struct kobject *kobj,                       \
 162                             struct attribute *attr, char *buff)         \
 163 {                                                                       \
 164         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);    \
 165                                                                         \
 166         return sprintf(buff, "%s\n",                                    \
 167                        atomic_read(&bat_priv->_name) == 0 ?             \
 168                        "disabled" : "enabled");                         \
 169 }                                                                       \
 170
 171 /* Use this, if you are going to turn a [name] in the soft-interface
 172  * (bat_priv) on or off
 173  */
 174 #define BATADV_ATTR_SIF_BOOL(_name, _mode, _post_func)                  \
 175         static BATADV_ATTR_SIF_STORE_BOOL(_name, _post_func)            \
 176         static BATADV_ATTR_SIF_SHOW_BOOL(_name)                         \
 177         static BATADV_ATTR(_name, _mode, batadv_show_##_name,           \
 178                            batadv_store_##_name)
 179
 180 #define BATADV_ATTR_SIF_STORE_UINT(_name, _var, _min, _max, _post_func) \
 181 ssize_t batadv_store_##_name(struct kobject *kobj,                      \
 182                              struct attribute *attr, char *buff,        \
 183                              size_t count)                              \
 184 {                                                                       \
 185         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);       \
 186         struct batadv_priv *bat_priv = netdev_priv(net_dev);            \
 187                                                                         \
 188         return __batadv_store_uint_attr(buff, count, _min, _max,        \
 189                                         _post_func, attr,               \
 190                                         &bat_priv->_var, net_dev,       \
 191                                         NULL);  \
 192 }
 193
 194 #define BATADV_ATTR_SIF_SHOW_UINT(_name, _var)                          \
 195 ssize_t batadv_show_##_name(struct kobject *kobj,                       \
 196                             struct attribute *attr, char *buff)         \
 197 {                                                                       \
 198         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);    \
 199                                                                         \
 200         return sprintf(buff, "%i\n", atomic_read(&bat_priv->_var));     \
 201 }                                                                       \
 202
 203 /* Use this, if you are going to set [name] in the soft-interface
 204  * (bat_priv) to an unsigned integer value
 205  */
 206 #define BATADV_ATTR_SIF_UINT(_name, _var, _mode, _min, _max, _post_func)\
 207         static BATADV_ATTR_SIF_STORE_UINT(_name, _var, _min, _max, _post_func)\
 208         static BATADV_ATTR_SIF_SHOW_UINT(_name, _var)                   \
 209         static BATADV_ATTR(_name, _mode, batadv_show_##_name,           \
 210                            batadv_store_##_name)
 211
 212 #define BATADV_ATTR_VLAN_STORE_BOOL(_name, _post_func)                  \
 213 ssize_t batadv_store_vlan_##_name(struct kobject *kobj,                 \
 214                                   struct attribute *attr, char *buff,   \
 215                                   size_t count)                         \
 216 {                                                                       \
 217         struct batadv_priv *bat_priv = batadv_vlan_kobj_to_batpriv(kobj);\
 218         struct batadv_softif_vlan *vlan = batadv_kobj_to_vlan(bat_priv, \
 219                                                               kobj);    \
 220         size_t res = __batadv_store_bool_attr(buff, count, _post_func,  \
 221                                               attr, &vlan->_name,       \
 222                                               bat_priv->soft_iface);    \
 223                                                                         \
 224         batadv_softif_vlan_put(vlan);                                   \
 225         return res;                                                     \
 226 }
 227
 228 #define BATADV_ATTR_VLAN_SHOW_BOOL(_name)                               \
 229 ssize_t batadv_show_vlan_##_name(struct kobject *kobj,                  \
 230                                  struct attribute *attr, char *buff)    \
 231 {                                                                       \
 232         struct batadv_priv *bat_priv = batadv_vlan_kobj_to_batpriv(kobj);\
 233         struct batadv_softif_vlan *vlan = batadv_kobj_to_vlan(bat_priv, \
 234                                                               kobj);    \
 235         size_t res = sprintf(buff, "%s\n",                              \
 236                              atomic_read(&vlan->_name) == 0 ?           \
 237                              "disabled" : "enabled");                   \
 238                                                                         \
 239         batadv_softif_vlan_put(vlan);                                   \
 240         return res;                                                     \
 241 }
 242
 243 /* Use this, if you are going to turn a [name] in the vlan struct on or off */
 244 #define BATADV_ATTR_VLAN_BOOL(_name, _mode, _post_func)                 \
 245         static BATADV_ATTR_VLAN_STORE_BOOL(_name, _post_func)           \
 246         static BATADV_ATTR_VLAN_SHOW_BOOL(_name)                        \
 247         static BATADV_ATTR_VLAN(_name, _mode, batadv_show_vlan_##_name, \
 248                                 batadv_store_vlan_##_name)
 249
 250 #define BATADV_ATTR_HIF_STORE_UINT(_name, _var, _min, _max, _post_func) \
 251 ssize_t batadv_store_##_name(struct kobject *kobj,                      \
 252                              struct attribute *attr, char *buff,        \
 253                              size_t count)                              \
 254 {                                                                       \
 255         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);       \
 256         struct batadv_hard_iface *hard_iface;                           \
 257         ssize_t length;                                                 \
 258                                                                         \
 259         hard_iface = batadv_hardif_get_by_netdev(net_dev);              \
 260         if (!hard_iface)                                                \
 261                 return 0;                                               \
 262                                                                         \
 263         length = __batadv_store_uint_attr(buff, count, _min, _max,      \
 264                                           _post_func, attr,             \
 265                                           &hard_iface->_var,            \
 266                                           hard_iface->soft_iface,       \
 267                                           net_dev);                     \
 268                                                                         \
 269         batadv_hardif_put(hard_iface);                          \
 270         return length;                                                  \
 271 }
 272
 273 #define BATADV_ATTR_HIF_SHOW_UINT(_name, _var)                          \
 274 ssize_t batadv_show_##_name(struct kobject *kobj,                       \
 275                             struct attribute *attr, char *buff)         \
 276 {                                                                       \
 277         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);       \
 278         struct batadv_hard_iface *hard_iface;                           \
 279         ssize_t length;                                                 \
 280                                                                         \
 281         hard_iface = batadv_hardif_get_by_netdev(net_dev);              \
 282         if (!hard_iface)                                                \
 283                 return 0;                                               \
 284                                                                         \
 285         length = sprintf(buff, "%i\n", atomic_read(&hard_iface->_var)); \
 286                                                                         \
 287         batadv_hardif_put(hard_iface);                          \
 288         return length;                                                  \
 289 }
 290
 291 /* Use this, if you are going to set [name] in hard_iface to an
 292  * unsigned integer value
 293  */
 294 #define BATADV_ATTR_HIF_UINT(_name, _var, _mode, _min, _max, _post_func)\
 295         static BATADV_ATTR_HIF_STORE_UINT(_name, _var, _min,            \
 296                                           _max, _post_func)             \
 297         static BATADV_ATTR_HIF_SHOW_UINT(_name, _var)                   \
 298         static BATADV_ATTR(_name, _mode, batadv_show_##_name,           \
 299                            batadv_store_##_name)
 300
 301 static int batadv_store_bool_attr(char *buff, size_t count,
 302                                   struct net_device *net_dev,
 303                                   const char *attr_name, atomic_t *attr,
 304                                   bool *changed)
 305 {
 306         int enabled = -1;
 307
 308         *changed = false;
 309
 310         if (buff[count - 1] == '\n')
 311                 buff[count - 1] = '\0';
 312
 313         if ((strncmp(buff, "1", 2) == 0) ||
 314             (strncmp(buff, "enable", 7) == 0) ||
 315             (strncmp(buff, "enabled", 8) == 0))
 316                 enabled = 1;
 317
 318         if ((strncmp(buff, "0", 2) == 0) ||
 319             (strncmp(buff, "disable", 8) == 0) ||
 320             (strncmp(buff, "disabled", 9) == 0))
 321                 enabled = 0;
 322
 323         if (enabled < 0) {
 324                 batadv_info(net_dev, "%s: Invalid parameter received: %s\n",
 325                             attr_name, buff);
 326                 return -EINVAL;
 327         }
 328
 329         if (atomic_read(attr) == enabled)
 330                 return count;
 331
 332         batadv_info(net_dev, "%s: Changing from: %s to: %s\n", attr_name,
 333                     atomic_read(attr) == 1 ? "enabled" : "disabled",
 334                     enabled == 1 ? "enabled" : "disabled");
 335
 336         *changed = true;
 337
 338         atomic_set(attr, (unsigned int)enabled);
 339         return count;
 340 }
 341
 342 static inline ssize_t
 343 __batadv_store_bool_attr(char *buff, size_t count,
 344                          void (*post_func)(struct net_device *),
 345                          struct attribute *attr,
 346                          atomic_t *attr_store, struct net_device *net_dev)
 347 {
 348         bool changed;
 349         int ret;
 350
 351         ret = batadv_store_bool_attr(buff, count, net_dev, attr->name,
 352                                      attr_store, &changed);
 353         if (post_func && changed)
 354                 post_func(net_dev);
 355
 356         return ret;
 357 }
 358
 359 static int batadv_store_uint_attr(const char *buff, size_t count,
 360                                   struct net_device *net_dev,
 361                                   struct net_device *slave_dev,
 362                                   const char *attr_name,
 363                                   unsigned int min, unsigned int max,
 364                                   atomic_t *attr)
 365 {
 366         char ifname[IFNAMSIZ + 3] = "";
 367         unsigned long uint_val;
 368         int ret;
 369
 370         ret = kstrtoul(buff, 10, &uint_val);
 371         if (ret) {
 372                 batadv_info(net_dev, "%s: Invalid parameter received: %s\n",
 373                             attr_name, buff);
 374                 return -EINVAL;
 375         }
 376
 377         if (uint_val < min) {
 378                 batadv_info(net_dev, "%s: Value is too small: %lu min: %u\n",
 379                             attr_name, uint_val, min);
 380                 return -EINVAL;
 381         }
 382
 383         if (uint_val > max) {
 384                 batadv_info(net_dev, "%s: Value is too big: %lu max: %u\n",
 385                             attr_name, uint_val, max);
 386                 return -EINVAL;
 387         }
 388
 389         if (atomic_read(attr) == uint_val)
 390                 return count;
 391
 392         if (slave_dev)
 393                 snprintf(ifname, sizeof(ifname), "%s: ", slave_dev->name);
 394
 395         batadv_info(net_dev, "%s: %sChanging from: %i to: %lu\n",
 396                     attr_name, ifname, atomic_read(attr), uint_val);
 397
 398         atomic_set(attr, uint_val);
 399         return count;
 400 }
 401
 402 static ssize_t __batadv_store_uint_attr(const char *buff, size_t count,
 403                                         int min, int max,
 404                                         void (*post_func)(struct net_device *),
 405                                         const struct attribute *attr,
 406                                         atomic_t *attr_store,
 407                                         struct net_device *net_dev,
 408                                         struct net_device *slave_dev)
 409 {
 410         int ret;
 411
 412         ret = batadv_store_uint_attr(buff, count, net_dev, slave_dev,
 413                                      attr->name, min, max, attr_store);
 414         if (post_func && ret)
 415                 post_func(net_dev);
 416
 417         return ret;
 418 }
 419
 420 static ssize_t batadv_show_bat_algo(struct kobject *kobj,
 421                                     struct attribute *attr, char *buff)
 422 {
 423         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 424
 425         return sprintf(buff, "%s\n", bat_priv->algo_ops->name);
 426 }
 427
 428 static void batadv_post_gw_reselect(struct net_device *net_dev)
 429 {
 430         struct batadv_priv *bat_priv = netdev_priv(net_dev);
 431
 432         batadv_gw_reselect(bat_priv);
 433 }
 434
 435 static ssize_t batadv_show_gw_mode(struct kobject *kobj, struct attribute *attr,
 436                                    char *buff)
 437 {
 438         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 439         int bytes_written;
 440
 441         /* GW mode is not available if the routing algorithm in use does not
 442          * implement the GW API
 443          */
 444         if (!bat_priv->algo_ops->gw.get_best_gw_node ||
 445             !bat_priv->algo_ops->gw.is_eligible)
 446                 return -ENOENT;
 447
 448         switch (atomic_read(&bat_priv->gw.mode)) {
 449         case BATADV_GW_MODE_CLIENT:
 450                 bytes_written = sprintf(buff, "%s\n",
 451                                         BATADV_GW_MODE_CLIENT_NAME);
 452                 break;
 453         case BATADV_GW_MODE_SERVER:
 454                 bytes_written = sprintf(buff, "%s\n",
 455                                         BATADV_GW_MODE_SERVER_NAME);
 456                 break;
 457         default:
 458                 bytes_written = sprintf(buff, "%s\n",
 459                                         BATADV_GW_MODE_OFF_NAME);
 460                 break;
 461         }
 462
 463         return bytes_written;
 464 }
 465
 466 static ssize_t batadv_store_gw_mode(struct kobject *kobj,
 467                                     struct attribute *attr, char *buff,
 468                                     size_t count)
 469 {
 470         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 471         struct batadv_priv *bat_priv = netdev_priv(net_dev);
 472         char *curr_gw_mode_str;
 473         int gw_mode_tmp = -1;
 474
 475         /* toggling GW mode is allowed only if the routing algorithm in use
 476          * provides the GW API
 477          */
 478         if (!bat_priv->algo_ops->gw.get_best_gw_node ||
 479             !bat_priv->algo_ops->gw.is_eligible)
 480                 return -EINVAL;
 481
 482         if (buff[count - 1] == '\n')
 483                 buff[count - 1] = '\0';
 484
 485         if (strncmp(buff, BATADV_GW_MODE_OFF_NAME,
 486                     strlen(BATADV_GW_MODE_OFF_NAME)) == 0)
 487                 gw_mode_tmp = BATADV_GW_MODE_OFF;
 488
 489         if (strncmp(buff, BATADV_GW_MODE_CLIENT_NAME,
 490                     strlen(BATADV_GW_MODE_CLIENT_NAME)) == 0)
 491                 gw_mode_tmp = BATADV_GW_MODE_CLIENT;
 492
 493         if (strncmp(buff, BATADV_GW_MODE_SERVER_NAME,
 494                     strlen(BATADV_GW_MODE_SERVER_NAME)) == 0)
 495                 gw_mode_tmp = BATADV_GW_MODE_SERVER;
 496
 497         if (gw_mode_tmp < 0) {
 498                 batadv_info(net_dev,
 499                             "Invalid parameter for 'gw mode' setting received: %s\n",
 500                             buff);
 501                 return -EINVAL;
 502         }
 503
 504         if (atomic_read(&bat_priv->gw.mode) == gw_mode_tmp)
 505                 return count;
 506
 507         switch (atomic_read(&bat_priv->gw.mode)) {
 508         case BATADV_GW_MODE_CLIENT:
 509                 curr_gw_mode_str = BATADV_GW_MODE_CLIENT_NAME;
 510                 break;
 511         case BATADV_GW_MODE_SERVER:
 512                 curr_gw_mode_str = BATADV_GW_MODE_SERVER_NAME;
 513                 break;
 514         default:
 515                 curr_gw_mode_str = BATADV_GW_MODE_OFF_NAME;
 516                 break;
 517         }
 518
 519         batadv_info(net_dev, "Changing gw mode from: %s to: %s\n",
 520                     curr_gw_mode_str, buff);
 521
 522         /* Invoking batadv_gw_reselect() is not enough to really de-select the
 523          * current GW. It will only instruct the gateway client code to perform
 524          * a re-election the next time that this is needed.
 525          *
 526          * When gw client mode is being switched off the current GW must be
 527          * de-selected explicitly otherwise no GW_ADD uevent is thrown on
 528          * client mode re-activation. This is operation is performed in
 529          * batadv_gw_check_client_stop().
 530          */
 531         batadv_gw_reselect(bat_priv);
 532         /* always call batadv_gw_check_client_stop() before changing the gateway
 533          * state
 534          */
 535         batadv_gw_check_client_stop(bat_priv);
 536         atomic_set(&bat_priv->gw.mode, (unsigned int)gw_mode_tmp);
 537         batadv_gw_tvlv_container_update(bat_priv);
 538         return count;
 539 }
 540
 541 static ssize_t batadv_show_gw_sel_class(struct kobject *kobj,
 542                                         struct attribute *attr, char *buff)
 543 {
 544         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 545
 546         /* GW selection class is not available if the routing algorithm in use
 547          * does not implement the GW API
 548          */
 549         if (!bat_priv->algo_ops->gw.get_best_gw_node ||
 550             !bat_priv->algo_ops->gw.is_eligible)
 551                 return -ENOENT;
 552
 553         if (bat_priv->algo_ops->gw.show_sel_class)
 554                 return bat_priv->algo_ops->gw.show_sel_class(bat_priv, buff);
 555
 556         return sprintf(buff, "%i\n", atomic_read(&bat_priv->gw.sel_class));
 557 }
 558
 559 static ssize_t batadv_store_gw_sel_class(struct kobject *kobj,
 560                                          struct attribute *attr, char *buff,
 561                                          size_t count)
 562 {
 563         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 564
 565         /* setting the GW selection class is allowed only if the routing
 566          * algorithm in use implements the GW API
 567          */
 568         if (!bat_priv->algo_ops->gw.get_best_gw_node ||
 569             !bat_priv->algo_ops->gw.is_eligible)
 570                 return -EINVAL;
 571
 572         if (buff[count - 1] == '\n')
 573                 buff[count - 1] = '\0';
 574
 575         if (bat_priv->algo_ops->gw.store_sel_class)
 576                 return bat_priv->algo_ops->gw.store_sel_class(bat_priv, buff,
 577                                                               count);
 578
 579         return __batadv_store_uint_attr(buff, count, 1, BATADV_TQ_MAX_VALUE,
 580                                         batadv_post_gw_reselect, attr,
 581                                         &bat_priv->gw.sel_class,
 582                                         bat_priv->soft_iface, NULL);
 583 }
 584
 585 static ssize_t batadv_show_gw_bwidth(struct kobject *kobj,
 586                                      struct attribute *attr, char *buff)
 587 {
 588         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 589         u32 down, up;
 590
 591         down = atomic_read(&bat_priv->gw.bandwidth_down);
 592         up = atomic_read(&bat_priv->gw.bandwidth_up);
 593
 594         return sprintf(buff, "%u.%u/%u.%u MBit\n", down / 10,
 595                        down % 10, up / 10, up % 10);
 596 }
 597
 598 static ssize_t batadv_store_gw_bwidth(struct kobject *kobj,
 599                                       struct attribute *attr, char *buff,
 600                                       size_t count)
 601 {
 602         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 603
 604         if (buff[count - 1] == '\n')
 605                 buff[count - 1] = '\0';
 606
 607         return batadv_gw_bandwidth_set(net_dev, buff, count);
 608 }
 609
 610 /**
 611  * batadv_show_isolation_mark - print the current isolation mark/mask
 612  * @kobj: kobject representing the private mesh sysfs directory
 613  * @attr: the batman-adv attribute the user is interacting with
 614  * @buff: the buffer that will contain the data to send back to the user
 615  *
 616  * Return: the number of bytes written into 'buff' on success or a negative
 617  * error code in case of failure
 618  */
 619 static ssize_t batadv_show_isolation_mark(struct kobject *kobj,
 620                                           struct attribute *attr, char *buff)
 621 {
 622         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 623
 624         return sprintf(buff, "%#.8x/%#.8x\n", bat_priv->isolation_mark,
 625                        bat_priv->isolation_mark_mask);
 626 }
 627
 628 /**
 629  * batadv_store_isolation_mark - parse and store the isolation mark/mask entered
 630  *  by the user
 631  * @kobj: kobject representing the private mesh sysfs directory
 632  * @attr: the batman-adv attribute the user is interacting with
 633  * @buff: the buffer containing the user data
 634  * @count: number of bytes in the buffer
 635  *
 636  * Return: 'count' on success or a negative error code in case of failure
 637  */
 638 static ssize_t batadv_store_isolation_mark(struct kobject *kobj,
 639                                            struct attribute *attr, char *buff,
 640                                            size_t count)
 641 {
 642         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 643         struct batadv_priv *bat_priv = netdev_priv(net_dev);
 644         u32 mark, mask;
 645         char *mask_ptr;
 646
 647         /* parse the mask if it has been specified, otherwise assume the mask is
 648          * the biggest possible
 649          */
 650         mask = 0xFFFFFFFF;
 651         mask_ptr = strchr(buff, '/');
 652         if (mask_ptr) {
 653                 *mask_ptr = '\0';
 654                 mask_ptr++;
 655
 656                 /* the mask must be entered in hex base as it is going to be a
 657                  * bitmask and not a prefix length
 658                  */
 659                 if (kstrtou32(mask_ptr, 16, &mask) < 0)
 660                         return -EINVAL;
 661         }
 662
 663         /* the mark can be entered in any base */
 664         if (kstrtou32(buff, 0, &mark) < 0)
 665                 return -EINVAL;
 666
 667         bat_priv->isolation_mark_mask = mask;
 668         /* erase bits not covered by the mask */
 669         bat_priv->isolation_mark = mark & bat_priv->isolation_mark_mask;
 670
 671         batadv_info(net_dev,
 672                     "New skb mark for extended isolation: %#.8x/%#.8x\n",
 673                     bat_priv->isolation_mark, bat_priv->isolation_mark_mask);
 674
 675         return count;
 676 }
 677
 678 BATADV_ATTR_SIF_BOOL(aggregated_ogms, S_IRUGO | S_IWUSR, NULL);
 679 BATADV_ATTR_SIF_BOOL(bonding, S_IRUGO | S_IWUSR, NULL);
 680 #ifdef CONFIG_BATMAN_ADV_BLA
 681 BATADV_ATTR_SIF_BOOL(bridge_loop_avoidance, S_IRUGO | S_IWUSR,
 682                      batadv_bla_status_update);
 683 #endif
 684 #ifdef CONFIG_BATMAN_ADV_DAT
 685 BATADV_ATTR_SIF_BOOL(distributed_arp_table, S_IRUGO | S_IWUSR,
 686                      batadv_dat_status_update);
 687 #endif
 688 BATADV_ATTR_SIF_BOOL(fragmentation, S_IRUGO | S_IWUSR, batadv_update_min_mtu);
 689 static BATADV_ATTR(routing_algo, S_IRUGO, batadv_show_bat_algo, NULL);
 690 static BATADV_ATTR(gw_mode, S_IRUGO | S_IWUSR, batadv_show_gw_mode,
 691                    batadv_store_gw_mode);
 692 BATADV_ATTR_SIF_UINT(orig_interval, orig_interval, S_IRUGO | S_IWUSR,
 693                      2 * BATADV_JITTER, INT_MAX, NULL);
 694 BATADV_ATTR_SIF_UINT(hop_penalty, hop_penalty, S_IRUGO | S_IWUSR, 0,
 695                      BATADV_TQ_MAX_VALUE, NULL);
 696 static BATADV_ATTR(gw_sel_class, S_IRUGO | S_IWUSR, batadv_show_gw_sel_class,
 697                    batadv_store_gw_sel_class);
 698 static BATADV_ATTR(gw_bandwidth, S_IRUGO | S_IWUSR, batadv_show_gw_bwidth,
 699                    batadv_store_gw_bwidth);
 700 #ifdef CONFIG_BATMAN_ADV_MCAST
 701 BATADV_ATTR_SIF_BOOL(multicast_mode, S_IRUGO | S_IWUSR, NULL);
 702 #endif
 703 #ifdef CONFIG_BATMAN_ADV_DEBUG
 704 BATADV_ATTR_SIF_UINT(log_level, log_level, S_IRUGO | S_IWUSR, 0,
 705                      BATADV_DBG_ALL, NULL);
 706 #endif
 707 #ifdef CONFIG_BATMAN_ADV_NC
 708 BATADV_ATTR_SIF_BOOL(network_coding, S_IRUGO | S_IWUSR,
 709                      batadv_nc_status_update);
 710 #endif
 711 static BATADV_ATTR(isolation_mark, S_IRUGO | S_IWUSR,
 712                    batadv_show_isolation_mark, batadv_store_isolation_mark);
 713
 714 static struct batadv_attribute *batadv_mesh_attrs[] = {
 715         &batadv_attr_aggregated_ogms,
 716         &batadv_attr_bonding,
 717 #ifdef CONFIG_BATMAN_ADV_BLA
 718         &batadv_attr_bridge_loop_avoidance,
 719 #endif
 720 #ifdef CONFIG_BATMAN_ADV_DAT
 721         &batadv_attr_distributed_arp_table,
 722 #endif
 723 #ifdef CONFIG_BATMAN_ADV_MCAST
 724         &batadv_attr_multicast_mode,
 725 #endif
 726         &batadv_attr_fragmentation,
 727         &batadv_attr_routing_algo,
 728         &batadv_attr_gw_mode,
 729         &batadv_attr_orig_interval,
 730         &batadv_attr_hop_penalty,
 731         &batadv_attr_gw_sel_class,
 732         &batadv_attr_gw_bandwidth,
 733 #ifdef CONFIG_BATMAN_ADV_DEBUG
 734         &batadv_attr_log_level,
 735 #endif
 736 #ifdef CONFIG_BATMAN_ADV_NC
 737         &batadv_attr_network_coding,
 738 #endif
 739         &batadv_attr_isolation_mark,
 740         NULL,
 741 };
 742
 743 BATADV_ATTR_VLAN_BOOL(ap_isolation, S_IRUGO | S_IWUSR, NULL);
 744
 745 /* array of vlan specific sysfs attributes */
 746 static struct batadv_attribute *batadv_vlan_attrs[] = {
 747         &batadv_attr_vlan_ap_isolation,
 748         NULL,
 749 };
 750
 751 int batadv_sysfs_add_meshif(struct net_device *dev)
 752 {
 753         struct kobject *batif_kobject = &dev->dev.kobj;
 754         struct batadv_priv *bat_priv = netdev_priv(dev);
 755         struct batadv_attribute **bat_attr;
 756         int err;
 757
 758         bat_priv->mesh_obj = kobject_create_and_add(BATADV_SYSFS_IF_MESH_SUBDIR,
 759                                                     batif_kobject);
 760         if (!bat_priv->mesh_obj) {
 761                 batadv_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
 762                            BATADV_SYSFS_IF_MESH_SUBDIR);
 763                 goto out;
 764         }
 765
 766         for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr) {
 767                 err = sysfs_create_file(bat_priv->mesh_obj,
 768                                         &((*bat_attr)->attr));
 769                 if (err) {
 770                         batadv_err(dev, "Can't add sysfs file: %s/%s/%s\n",
 771                                    dev->name, BATADV_SYSFS_IF_MESH_SUBDIR,
 772                                    ((*bat_attr)->attr).name);
 773                         goto rem_attr;
 774                 }
 775         }
 776
 777         return 0;
 778
 779 rem_attr:
 780         for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr)
 781                 sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
 782
 783         kobject_uevent(bat_priv->mesh_obj, KOBJ_REMOVE);
 784         kobject_del(bat_priv->mesh_obj);
 785         kobject_put(bat_priv->mesh_obj);
 786         bat_priv->mesh_obj = NULL;
 787 out:
 788         return -ENOMEM;
 789 }
 790
 791 void batadv_sysfs_del_meshif(struct net_device *dev)
 792 {
 793         struct batadv_priv *bat_priv = netdev_priv(dev);
 794         struct batadv_attribute **bat_attr;
 795
 796         for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr)
 797                 sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
 798
 799         kobject_uevent(bat_priv->mesh_obj, KOBJ_REMOVE);
 800         kobject_del(bat_priv->mesh_obj);
 801         kobject_put(bat_priv->mesh_obj);
 802         bat_priv->mesh_obj = NULL;
 803 }
 804
 805 /**
 806  * batadv_sysfs_add_vlan - add all the needed sysfs objects for the new vlan
 807  * @dev: netdev of the mesh interface
 808  * @vlan: private data of the newly added VLAN interface
 809  *
 810  * Return: 0 on success and -ENOMEM if any of the structure allocations fails.
 811  */
 812 int batadv_sysfs_add_vlan(struct net_device *dev,
 813                           struct batadv_softif_vlan *vlan)
 814 {
 815         char vlan_subdir[sizeof(BATADV_SYSFS_VLAN_SUBDIR_PREFIX) + 5];
 816         struct batadv_priv *bat_priv = netdev_priv(dev);
 817         struct batadv_attribute **bat_attr;
 818         int err;
 819
 820         if (vlan->vid & BATADV_VLAN_HAS_TAG) {
 821                 sprintf(vlan_subdir, BATADV_SYSFS_VLAN_SUBDIR_PREFIX "%hu",
 822                         vlan->vid & VLAN_VID_MASK);
 823
 824                 vlan->kobj = kobject_create_and_add(vlan_subdir,
 825                                                     bat_priv->mesh_obj);
 826                 if (!vlan->kobj) {
 827                         batadv_err(dev, "Can't add sysfs directory: %s/%s\n",
 828                                    dev->name, vlan_subdir);
 829                         goto out;
 830                 }
 831         } else {
 832                 /* the untagged LAN uses the root folder to store its "VLAN
 833                  * specific attributes"
 834                  */
 835                 vlan->kobj = bat_priv->mesh_obj;
 836                 kobject_get(bat_priv->mesh_obj);
 837         }
 838
 839         for (bat_attr = batadv_vlan_attrs; *bat_attr; ++bat_attr) {
 840                 err = sysfs_create_file(vlan->kobj,
 841                                         &((*bat_attr)->attr));
 842                 if (err) {
 843                         batadv_err(dev, "Can't add sysfs file: %s/%s/%s\n",
 844                                    dev->name, vlan_subdir,
 845                                    ((*bat_attr)->attr).name);
 846                         goto rem_attr;
 847                 }
 848         }
 849
 850         return 0;
 851
 852 rem_attr:
 853         for (bat_attr = batadv_vlan_attrs; *bat_attr; ++bat_attr)
 854                 sysfs_remove_file(vlan->kobj, &((*bat_attr)->attr));
 855
 856         if (vlan->kobj != bat_priv->mesh_obj) {
 857                 kobject_uevent(vlan->kobj, KOBJ_REMOVE);
 858                 kobject_del(vlan->kobj);
 859         }
 860         kobject_put(vlan->kobj);
 861         vlan->kobj = NULL;
 862 out:
 863         return -ENOMEM;
 864 }
 865
 866 /**
 867  * batadv_sysfs_del_vlan - remove all the sysfs objects for a given VLAN
 868  * @bat_priv: the bat priv with all the soft interface information
 869  * @vlan: the private data of the VLAN to destroy
 870  */
 871 void batadv_sysfs_del_vlan(struct batadv_priv *bat_priv,
 872                            struct batadv_softif_vlan *vlan)
 873 {
 874         struct batadv_attribute **bat_attr;
 875
 876         for (bat_attr = batadv_vlan_attrs; *bat_attr; ++bat_attr)
 877                 sysfs_remove_file(vlan->kobj, &((*bat_attr)->attr));
 878
 879         if (vlan->kobj != bat_priv->mesh_obj) {
 880                 kobject_uevent(vlan->kobj, KOBJ_REMOVE);
 881                 kobject_del(vlan->kobj);
 882         }
 883         kobject_put(vlan->kobj);
 884         vlan->kobj = NULL;
 885 }
 886
 887 static ssize_t batadv_show_mesh_iface(struct kobject *kobj,
 888                                       struct attribute *attr, char *buff)
 889 {
 890         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 891         struct batadv_hard_iface *hard_iface;
 892         ssize_t length;
 893         const char *ifname;
 894
 895         hard_iface = batadv_hardif_get_by_netdev(net_dev);
 896         if (!hard_iface)
 897                 return 0;
 898
 899         if (hard_iface->if_status == BATADV_IF_NOT_IN_USE)
 900                 ifname =  "none";
 901         else
 902                 ifname = hard_iface->soft_iface->name;
 903
 904         length = sprintf(buff, "%s\n", ifname);
 905
 906         batadv_hardif_put(hard_iface);
 907
 908         return length;
 909 }
 910
 911 /**
 912  * batadv_store_mesh_iface_finish - store new hardif mesh_iface state
 913  * @net_dev: netdevice to add/remove to/from batman-adv soft-interface
 914  * @ifname: name of soft-interface to modify
 915  *
 916  * Changes the parts of the hard+soft interface which can not be modified under
 917  * sysfs lock (to prevent deadlock situations).
 918  *
 919  * Return: 0 on success, 0 < on failure
 920  */
 921 static int batadv_store_mesh_iface_finish(struct net_device *net_dev,
 922                                           char ifname[IFNAMSIZ])
 923 {
 924         struct net *net = dev_net(net_dev);
 925         struct batadv_hard_iface *hard_iface;
 926         int status_tmp;
 927         int ret = 0;
 928
 929         ASSERT_RTNL();
 930
 931         hard_iface = batadv_hardif_get_by_netdev(net_dev);
 932         if (!hard_iface)
 933                 return 0;
 934
 935         if (strncmp(ifname, "none", 4) == 0)
 936                 status_tmp = BATADV_IF_NOT_IN_USE;
 937         else
 938                 status_tmp = BATADV_IF_I_WANT_YOU;
 939
 940         if (hard_iface->if_status == status_tmp)
 941                 goto out;
 942
 943         if ((hard_iface->soft_iface) &&
 944             (strncmp(hard_iface->soft_iface->name, ifname, IFNAMSIZ) == 0))
 945                 goto out;
 946
 947         if (status_tmp == BATADV_IF_NOT_IN_USE) {
 948                 batadv_hardif_disable_interface(hard_iface,
 949                                                 BATADV_IF_CLEANUP_AUTO);
 950                 goto out;
 951         }
 952
 953         /* if the interface already is in use */
 954         if (hard_iface->if_status != BATADV_IF_NOT_IN_USE)
 955                 batadv_hardif_disable_interface(hard_iface,
 956                                                 BATADV_IF_CLEANUP_AUTO);
 957
 958         ret = batadv_hardif_enable_interface(hard_iface, net, ifname);
 959 out:
 960         batadv_hardif_put(hard_iface);
 961         return ret;
 962 }
 963
 964 /**
 965  * batadv_store_mesh_iface_work - store new hardif mesh_iface state
 966  * @work: work queue item
 967  *
 968  * Changes the parts of the hard+soft interface which can not be modified under
 969  * sysfs lock (to prevent deadlock situations).
 970  */
 971 static void batadv_store_mesh_iface_work(struct work_struct *work)
 972 {
 973         struct batadv_store_mesh_work *store_work;
 974         int ret;
 975
 976         store_work = container_of(work, struct batadv_store_mesh_work, work);
 977
 978         rtnl_lock();
 979         ret = batadv_store_mesh_iface_finish(store_work->net_dev,
 980                                              store_work->soft_iface_name);
 981         rtnl_unlock();
 982
 983         if (ret < 0)
 984                 pr_err("Failed to store new mesh_iface state %s for %s: %d\n",
 985                        store_work->soft_iface_name, store_work->net_dev->name,
 986                        ret);
 987
 988         dev_put(store_work->net_dev);
 989         kfree(store_work);
 990 }
 991
 992 static ssize_t batadv_store_mesh_iface(struct kobject *kobj,
 993                                        struct attribute *attr, char *buff,
 994                                        size_t count)
 995 {
 996         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 997         struct batadv_store_mesh_work *store_work;
 998
 999         if (buff[count - 1] == '\n')
1000                 buff[count - 1] = '\0';
1001
1002         if (strlen(buff) >= IFNAMSIZ) {
1003                 pr_err("Invalid parameter for 'mesh_iface' setting received: interface name too long '%s'\n",
1004                        buff);
1005                 return -EINVAL;
1006         }
1007
1008         store_work = kmalloc(sizeof(*store_work), GFP_KERNEL);
1009         if (!store_work)
1010                 return -ENOMEM;
1011
1012         dev_hold(net_dev);
1013         INIT_WORK(&store_work->work, batadv_store_mesh_iface_work);
1014         store_work->net_dev = net_dev;
1015         strlcpy(store_work->soft_iface_name, buff,
1016                 sizeof(store_work->soft_iface_name));
1017
1018         queue_work(batadv_event_workqueue, &store_work->work);
1019
1020         return count;
1021 }
1022
1023 static ssize_t batadv_show_iface_status(struct kobject *kobj,
1024                                         struct attribute *attr, char *buff)
1025 {
1026         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
1027         struct batadv_hard_iface *hard_iface;
1028         ssize_t length;
1029
1030         hard_iface = batadv_hardif_get_by_netdev(net_dev);
1031         if (!hard_iface)
1032                 return 0;
1033
1034         switch (hard_iface->if_status) {
1035         case BATADV_IF_TO_BE_REMOVED:
1036                 length = sprintf(buff, "disabling\n");
1037                 break;
1038         case BATADV_IF_INACTIVE:
1039                 length = sprintf(buff, "inactive\n");
1040                 break;
1041         case BATADV_IF_ACTIVE:
1042                 length = sprintf(buff, "active\n");
1043                 break;
1044         case BATADV_IF_TO_BE_ACTIVATED:
1045                 length = sprintf(buff, "enabling\n");
1046                 break;
1047         case BATADV_IF_NOT_IN_USE:
1048         default:
1049                 length = sprintf(buff, "not in use\n");
1050                 break;
1051         }
1052
1053         batadv_hardif_put(hard_iface);
1054
1055         return length;
1056 }
1057
1058 #ifdef CONFIG_BATMAN_ADV_BATMAN_V
1059
1060 /**
1061  * batadv_store_throughput_override - parse and store throughput override
1062  *  entered by the user
1063  * @kobj: kobject representing the private mesh sysfs directory
1064  * @attr: the batman-adv attribute the user is interacting with
1065  * @buff: the buffer containing the user data
1066  * @count: number of bytes in the buffer
1067  *
1068  * Return: 'count' on success or a negative error code in case of failure
1069  */
1070 static ssize_t batadv_store_throughput_override(struct kobject *kobj,
1071                                                 struct attribute *attr,
1072                                                 char *buff, size_t count)
1073 {
1074         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
1075         struct batadv_hard_iface *hard_iface;
1076         u32 tp_override;
1077         u32 old_tp_override;
1078         bool ret;
1079
1080         hard_iface = batadv_hardif_get_by_netdev(net_dev);
1081         if (!hard_iface)
1082                 return -EINVAL;
1083
1084         if (buff[count - 1] == '\n')
1085                 buff[count - 1] = '\0';
1086
1087         ret = batadv_parse_throughput(net_dev, buff, "throughput_override",
1088                                       &tp_override);
1089         if (!ret)
1090                 goto out;
1091
1092         old_tp_override = atomic_read(&hard_iface->bat_v.throughput_override);
1093         if (old_tp_override == tp_override)
1094                 goto out;
1095
1096         batadv_info(hard_iface->soft_iface,
1097                     "%s: %s: Changing from: %u.%u MBit to: %u.%u MBit\n",
1098                     "throughput_override", net_dev->name,
1099                     old_tp_override / 10, old_tp_override % 10,
1100                     tp_override / 10, tp_override % 10);
1101
1102         atomic_set(&hard_iface->bat_v.throughput_override, tp_override);
1103
1104 out:
1105         batadv_hardif_put(hard_iface);
1106         return count;
1107 }
1108
1109 static ssize_t batadv_show_throughput_override(struct kobject *kobj,
1110                                                struct attribute *attr,
1111                                                char *buff)
1112 {
1113         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
1114         struct batadv_hard_iface *hard_iface;
1115         u32 tp_override;
1116
1117         hard_iface = batadv_hardif_get_by_netdev(net_dev);
1118         if (!hard_iface)
1119                 return -EINVAL;
1120
1121         tp_override = atomic_read(&hard_iface->bat_v.throughput_override);
1122
1123         batadv_hardif_put(hard_iface);
1124         return sprintf(buff, "%u.%u MBit\n", tp_override / 10,
1125                        tp_override % 10);
1126 }
1127
1128 #endif
1129
1130 static BATADV_ATTR(mesh_iface, S_IRUGO | S_IWUSR, batadv_show_mesh_iface,
1131                    batadv_store_mesh_iface);
1132 static BATADV_ATTR(iface_status, S_IRUGO, batadv_show_iface_status, NULL);
1133 #ifdef CONFIG_BATMAN_ADV_BATMAN_V
1134 BATADV_ATTR_HIF_UINT(elp_interval, bat_v.elp_interval, S_IRUGO | S_IWUSR,
1135                      2 * BATADV_JITTER, INT_MAX, NULL);
1136 static BATADV_ATTR(throughput_override, S_IRUGO | S_IWUSR,
1137                    batadv_show_throughput_override,
1138                    batadv_store_throughput_override);
1139 #endif
1140
1141 static struct batadv_attribute *batadv_batman_attrs[] = {
1142         &batadv_attr_mesh_iface,
1143         &batadv_attr_iface_status,
1144 #ifdef CONFIG_BATMAN_ADV_BATMAN_V
1145         &batadv_attr_elp_interval,
1146         &batadv_attr_throughput_override,
1147 #endif
1148         NULL,
1149 };
1150
1151 int batadv_sysfs_add_hardif(struct kobject **hardif_obj, struct net_device *dev)
1152 {
1153         struct kobject *hardif_kobject = &dev->dev.kobj;
1154         struct batadv_attribute **bat_attr;
1155         int err;
1156
1157         *hardif_obj = kobject_create_and_add(BATADV_SYSFS_IF_BAT_SUBDIR,
1158                                              hardif_kobject);
1159
1160         if (!*hardif_obj) {
1161                 batadv_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
1162                            BATADV_SYSFS_IF_BAT_SUBDIR);
1163                 goto out;
1164         }
1165
1166         for (bat_attr = batadv_batman_attrs; *bat_attr; ++bat_attr) {
1167                 err = sysfs_create_file(*hardif_obj, &((*bat_attr)->attr));
1168                 if (err) {
1169                         batadv_err(dev, "Can't add sysfs file: %s/%s/%s\n",
1170                                    dev->name, BATADV_SYSFS_IF_BAT_SUBDIR,
1171                                    ((*bat_attr)->attr).name);
1172                         goto rem_attr;
1173                 }
1174         }
1175
1176         return 0;
1177
1178 rem_attr:
1179         for (bat_attr = batadv_batman_attrs; *bat_attr; ++bat_attr)
1180                 sysfs_remove_file(*hardif_obj, &((*bat_attr)->attr));
1181 out:
1182         return -ENOMEM;
1183 }
1184
1185 void batadv_sysfs_del_hardif(struct kobject **hardif_obj)
1186 {
1187         kobject_uevent(*hardif_obj, KOBJ_REMOVE);
1188         kobject_del(*hardif_obj);
1189         kobject_put(*hardif_obj);
1190         *hardif_obj = NULL;
1191 }
1192
1193 int batadv_throw_uevent(struct batadv_priv *bat_priv, enum batadv_uev_type type,
1194                         enum batadv_uev_action action, const char *data)
1195 {
1196         int ret = -ENOMEM;
1197         struct kobject *bat_kobj;
1198         char *uevent_env[4] = { NULL, NULL, NULL, NULL };
1199
1200         bat_kobj = &bat_priv->soft_iface->dev.kobj;
1201
1202         uevent_env[0] = kasprintf(GFP_ATOMIC,
1203                                   "%s%s", BATADV_UEV_TYPE_VAR,
1204                                   batadv_uev_type_str[type]);
1205         if (!uevent_env[0])
1206                 goto out;
1207
1208         uevent_env[1] = kasprintf(GFP_ATOMIC,
1209                                   "%s%s", BATADV_UEV_ACTION_VAR,
1210                                   batadv_uev_action_str[action]);
1211         if (!uevent_env[1])
1212                 goto out;
1213
1214         /* If the event is DEL, ignore the data field */
1215         if (action != BATADV_UEV_DEL) {
1216                 uevent_env[2] = kasprintf(GFP_ATOMIC,
1217                                           "%s%s", BATADV_UEV_DATA_VAR, data);
1218                 if (!uevent_env[2])
1219                         goto out;
1220         }
1221
1222         ret = kobject_uevent_env(bat_kobj, KOBJ_CHANGE, uevent_env);
1223 out:
1224         kfree(uevent_env[0]);
1225         kfree(uevent_env[1]);
1226         kfree(uevent_env[2]);
1227
1228         if (ret)
1229                 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
1230                            "Impossible to send uevent for (%s,%s,%s) event (err: %d)\n",
1231                            batadv_uev_type_str[type],
1232                            batadv_uev_action_str[action],
1233                            (action == BATADV_UEV_DEL ? "NULL" : data), ret);
1234         return ret;
1235 }