net/batman-adv/sysfs.c

   1 /* Copyright (C) 2010-2013 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 "sysfs.h"
  22 #include "translation-table.h"
  23 #include "distributed-arp-table.h"
  24 #include "network-coding.h"
  25 #include "originator.h"
  26 #include "hard-interface.h"
  27 #include "soft-interface.h"
  28 #include "gateway_common.h"
  29 #include "gateway_client.h"
  30
  31 static struct net_device *batadv_kobj_to_netdev(struct kobject *obj)
  32 {
  33         struct device *dev = container_of(obj->parent, struct device, kobj);
  34         return to_net_dev(dev);
  35 }
  36
  37 static struct batadv_priv *batadv_kobj_to_batpriv(struct kobject *obj)
  38 {
  39         struct net_device *net_dev = batadv_kobj_to_netdev(obj);
  40         return netdev_priv(net_dev);
  41 }
  42
  43 /**
  44  * batadv_vlan_kobj_to_batpriv - convert a vlan kobj in the associated batpriv
  45  * @obj: kobject to covert
  46  *
  47  * Returns the associated batadv_priv struct.
  48  */
  49 static struct batadv_priv *batadv_vlan_kobj_to_batpriv(struct kobject *obj)
  50 {
  51         /* VLAN specific attributes are located in the root sysfs folder if they
  52          * refer to the untagged VLAN..
  53          */
  54         if (!strcmp(BATADV_SYSFS_IF_MESH_SUBDIR, obj->name))
  55                 return batadv_kobj_to_batpriv(obj);
  56
  57         /* ..while the attributes for the tagged vlans are located in
  58          * the in the corresponding "vlan%VID" subfolder
  59          */
  60         return batadv_kobj_to_batpriv(obj->parent);
  61 }
  62
  63 /**
  64  * batadv_kobj_to_vlan - convert a kobj in the associated softif_vlan struct
  65  * @obj: kobject to covert
  66  *
  67  * Returns the associated softif_vlan struct if found, NULL otherwise.
  68  */
  69 static struct batadv_softif_vlan *
  70 batadv_kobj_to_vlan(struct batadv_priv *bat_priv, struct kobject *obj)
  71 {
  72         struct batadv_softif_vlan *vlan_tmp, *vlan = NULL;
  73
  74         rcu_read_lock();
  75         hlist_for_each_entry_rcu(vlan_tmp, &bat_priv->softif_vlan_list, list) {
  76                 if (vlan_tmp->kobj != obj)
  77                         continue;
  78
  79                 if (!atomic_inc_not_zero(&vlan_tmp->refcount))
  80                         continue;
  81
  82                 vlan = vlan_tmp;
  83                 break;
  84         }
  85         rcu_read_unlock();
  86
  87         return vlan;
  88 }
  89
  90 #define BATADV_UEV_TYPE_VAR     "BATTYPE="
  91 #define BATADV_UEV_ACTION_VAR   "BATACTION="
  92 #define BATADV_UEV_DATA_VAR     "BATDATA="
  93
  94 static char *batadv_uev_action_str[] = {
  95         "add",
  96         "del",
  97         "change"
  98 };
  99
 100 static char *batadv_uev_type_str[] = {
 101         "gw"
 102 };
 103
 104 /* Use this, if you have customized show and store functions for vlan attrs */
 105 #define BATADV_ATTR_VLAN(_name, _mode, _show, _store)   \
 106 struct batadv_attribute batadv_attr_vlan_##_name = {    \
 107         .attr = {.name = __stringify(_name),            \
 108                  .mode = _mode },                       \
 109         .show   = _show,                                \
 110         .store  = _store,                               \
 111 };
 112
 113 /* Use this, if you have customized show and store functions */
 114 #define BATADV_ATTR(_name, _mode, _show, _store)        \
 115 struct batadv_attribute batadv_attr_##_name = {         \
 116         .attr = {.name = __stringify(_name),            \
 117                  .mode = _mode },                       \
 118         .show   = _show,                                \
 119         .store  = _store,                               \
 120 };
 121
 122 #define BATADV_ATTR_SIF_STORE_BOOL(_name, _post_func)                   \
 123 ssize_t batadv_store_##_name(struct kobject *kobj,                      \
 124                              struct attribute *attr, char *buff,        \
 125                              size_t count)                              \
 126 {                                                                       \
 127         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);       \
 128         struct batadv_priv *bat_priv = netdev_priv(net_dev);            \
 129         return __batadv_store_bool_attr(buff, count, _post_func, attr,  \
 130                                         &bat_priv->_name, net_dev);     \
 131 }
 132
 133 #define BATADV_ATTR_SIF_SHOW_BOOL(_name)                                \
 134 ssize_t batadv_show_##_name(struct kobject *kobj,                       \
 135                             struct attribute *attr, char *buff)         \
 136 {                                                                       \
 137         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);    \
 138         return sprintf(buff, "%s\n",                                    \
 139                        atomic_read(&bat_priv->_name) == 0 ?             \
 140                        "disabled" : "enabled");                         \
 141 }                                                                       \
 142
 143 /* Use this, if you are going to turn a [name] in the soft-interface
 144  * (bat_priv) on or off
 145  */
 146 #define BATADV_ATTR_SIF_BOOL(_name, _mode, _post_func)                  \
 147         static BATADV_ATTR_SIF_STORE_BOOL(_name, _post_func)            \
 148         static BATADV_ATTR_SIF_SHOW_BOOL(_name)                         \
 149         static BATADV_ATTR(_name, _mode, batadv_show_##_name,           \
 150                            batadv_store_##_name)
 151
 152
 153 #define BATADV_ATTR_SIF_STORE_UINT(_name, _min, _max, _post_func)       \
 154 ssize_t batadv_store_##_name(struct kobject *kobj,                      \
 155                              struct attribute *attr, char *buff,        \
 156                              size_t count)                              \
 157 {                                                                       \
 158         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);       \
 159         struct batadv_priv *bat_priv = netdev_priv(net_dev);            \
 160         return __batadv_store_uint_attr(buff, count, _min, _max,        \
 161                                         _post_func, attr,               \
 162                                         &bat_priv->_name, net_dev);     \
 163 }
 164
 165 #define BATADV_ATTR_SIF_SHOW_UINT(_name)                                \
 166 ssize_t batadv_show_##_name(struct kobject *kobj,                       \
 167                             struct attribute *attr, char *buff)         \
 168 {                                                                       \
 169         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);    \
 170         return sprintf(buff, "%i\n", atomic_read(&bat_priv->_name));    \
 171 }                                                                       \
 172
 173 /* Use this, if you are going to set [name] in the soft-interface
 174  * (bat_priv) to an unsigned integer value
 175  */
 176 #define BATADV_ATTR_SIF_UINT(_name, _mode, _min, _max, _post_func)      \
 177         static BATADV_ATTR_SIF_STORE_UINT(_name, _min, _max, _post_func)\
 178         static BATADV_ATTR_SIF_SHOW_UINT(_name)                         \
 179         static BATADV_ATTR(_name, _mode, batadv_show_##_name,           \
 180                            batadv_store_##_name)
 181
 182 #define BATADV_ATTR_VLAN_STORE_BOOL(_name, _post_func)                  \
 183 ssize_t batadv_store_vlan_##_name(struct kobject *kobj,                 \
 184                                   struct attribute *attr, char *buff,   \
 185                                   size_t count)                         \
 186 {                                                                       \
 187         struct batadv_priv *bat_priv = batadv_vlan_kobj_to_batpriv(kobj);\
 188         struct batadv_softif_vlan *vlan = batadv_kobj_to_vlan(bat_priv, \
 189                                                               kobj);    \
 190         size_t res = __batadv_store_bool_attr(buff, count, _post_func,  \
 191                                               attr, &vlan->_name,       \
 192                                               bat_priv->soft_iface);    \
 193         batadv_softif_vlan_free_ref(vlan);                              \
 194         return res;                                                     \
 195 }
 196
 197 #define BATADV_ATTR_VLAN_SHOW_BOOL(_name)                               \
 198 ssize_t batadv_show_vlan_##_name(struct kobject *kobj,                  \
 199                                  struct attribute *attr, char *buff)    \
 200 {                                                                       \
 201         struct batadv_priv *bat_priv = batadv_vlan_kobj_to_batpriv(kobj);\
 202         struct batadv_softif_vlan *vlan = batadv_kobj_to_vlan(bat_priv, \
 203                                                               kobj);    \
 204         size_t res = sprintf(buff, "%s\n",                              \
 205                              atomic_read(&vlan->_name) == 0 ?           \
 206                              "disabled" : "enabled");                   \
 207         batadv_softif_vlan_free_ref(vlan);                              \
 208         return res;                                                     \
 209 }
 210
 211 /* Use this, if you are going to turn a [name] in the vlan struct on or off */
 212 #define BATADV_ATTR_VLAN_BOOL(_name, _mode, _post_func)                 \
 213         static BATADV_ATTR_VLAN_STORE_BOOL(_name, _post_func)           \
 214         static BATADV_ATTR_VLAN_SHOW_BOOL(_name)                        \
 215         static BATADV_ATTR_VLAN(_name, _mode, batadv_show_vlan_##_name, \
 216                                 batadv_store_vlan_##_name)
 217
 218 static int batadv_store_bool_attr(char *buff, size_t count,
 219                                   struct net_device *net_dev,
 220                                   const char *attr_name, atomic_t *attr)
 221 {
 222         int enabled = -1;
 223
 224         if (buff[count - 1] == '\n')
 225                 buff[count - 1] = '\0';
 226
 227         if ((strncmp(buff, "1", 2) == 0) ||
 228             (strncmp(buff, "enable", 7) == 0) ||
 229             (strncmp(buff, "enabled", 8) == 0))
 230                 enabled = 1;
 231
 232         if ((strncmp(buff, "0", 2) == 0) ||
 233             (strncmp(buff, "disable", 8) == 0) ||
 234             (strncmp(buff, "disabled", 9) == 0))
 235                 enabled = 0;
 236
 237         if (enabled < 0) {
 238                 batadv_info(net_dev, "%s: Invalid parameter received: %s\n",
 239                             attr_name, buff);
 240                 return -EINVAL;
 241         }
 242
 243         if (atomic_read(attr) == enabled)
 244                 return count;
 245
 246         batadv_info(net_dev, "%s: Changing from: %s to: %s\n", attr_name,
 247                     atomic_read(attr) == 1 ? "enabled" : "disabled",
 248                     enabled == 1 ? "enabled" : "disabled");
 249
 250         atomic_set(attr, (unsigned int)enabled);
 251         return count;
 252 }
 253
 254 static inline ssize_t
 255 __batadv_store_bool_attr(char *buff, size_t count,
 256                          void (*post_func)(struct net_device *),
 257                          struct attribute *attr,
 258                          atomic_t *attr_store, struct net_device *net_dev)
 259 {
 260         int ret;
 261
 262         ret = batadv_store_bool_attr(buff, count, net_dev, attr->name,
 263                                      attr_store);
 264         if (post_func && ret)
 265                 post_func(net_dev);
 266
 267         return ret;
 268 }
 269
 270 static int batadv_store_uint_attr(const char *buff, size_t count,
 271                                   struct net_device *net_dev,
 272                                   const char *attr_name,
 273                                   unsigned int min, unsigned int max,
 274                                   atomic_t *attr)
 275 {
 276         unsigned long uint_val;
 277         int ret;
 278
 279         ret = kstrtoul(buff, 10, &uint_val);
 280         if (ret) {
 281                 batadv_info(net_dev, "%s: Invalid parameter received: %s\n",
 282                             attr_name, buff);
 283                 return -EINVAL;
 284         }
 285
 286         if (uint_val < min) {
 287                 batadv_info(net_dev, "%s: Value is too small: %lu min: %u\n",
 288                             attr_name, uint_val, min);
 289                 return -EINVAL;
 290         }
 291
 292         if (uint_val > max) {
 293                 batadv_info(net_dev, "%s: Value is too big: %lu max: %u\n",
 294                             attr_name, uint_val, max);
 295                 return -EINVAL;
 296         }
 297
 298         if (atomic_read(attr) == uint_val)
 299                 return count;
 300
 301         batadv_info(net_dev, "%s: Changing from: %i to: %lu\n",
 302                     attr_name, atomic_read(attr), uint_val);
 303
 304         atomic_set(attr, uint_val);
 305         return count;
 306 }
 307
 308 static inline ssize_t
 309 __batadv_store_uint_attr(const char *buff, size_t count,
 310                          int min, int max,
 311                          void (*post_func)(struct net_device *),
 312                          const struct attribute *attr,
 313                          atomic_t *attr_store, struct net_device *net_dev)
 314 {
 315         int ret;
 316
 317         ret = batadv_store_uint_attr(buff, count, net_dev, attr->name, min, max,
 318                                      attr_store);
 319         if (post_func && ret)
 320                 post_func(net_dev);
 321
 322         return ret;
 323 }
 324
 325 static ssize_t batadv_show_bat_algo(struct kobject *kobj,
 326                                     struct attribute *attr, char *buff)
 327 {
 328         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 329         return sprintf(buff, "%s\n", bat_priv->bat_algo_ops->name);
 330 }
 331
 332 static void batadv_post_gw_deselect(struct net_device *net_dev)
 333 {
 334         struct batadv_priv *bat_priv = netdev_priv(net_dev);
 335         batadv_gw_deselect(bat_priv);
 336 }
 337
 338 static ssize_t batadv_show_gw_mode(struct kobject *kobj, struct attribute *attr,
 339                                    char *buff)
 340 {
 341         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 342         int bytes_written;
 343
 344         switch (atomic_read(&bat_priv->gw_mode)) {
 345         case BATADV_GW_MODE_CLIENT:
 346                 bytes_written = sprintf(buff, "%s\n",
 347                                         BATADV_GW_MODE_CLIENT_NAME);
 348                 break;
 349         case BATADV_GW_MODE_SERVER:
 350                 bytes_written = sprintf(buff, "%s\n",
 351                                         BATADV_GW_MODE_SERVER_NAME);
 352                 break;
 353         default:
 354                 bytes_written = sprintf(buff, "%s\n",
 355                                         BATADV_GW_MODE_OFF_NAME);
 356                 break;
 357         }
 358
 359         return bytes_written;
 360 }
 361
 362 static ssize_t batadv_store_gw_mode(struct kobject *kobj,
 363                                     struct attribute *attr, char *buff,
 364                                     size_t count)
 365 {
 366         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 367         struct batadv_priv *bat_priv = netdev_priv(net_dev);
 368         char *curr_gw_mode_str;
 369         int gw_mode_tmp = -1;
 370
 371         if (buff[count - 1] == '\n')
 372                 buff[count - 1] = '\0';
 373
 374         if (strncmp(buff, BATADV_GW_MODE_OFF_NAME,
 375                     strlen(BATADV_GW_MODE_OFF_NAME)) == 0)
 376                 gw_mode_tmp = BATADV_GW_MODE_OFF;
 377
 378         if (strncmp(buff, BATADV_GW_MODE_CLIENT_NAME,
 379                     strlen(BATADV_GW_MODE_CLIENT_NAME)) == 0)
 380                 gw_mode_tmp = BATADV_GW_MODE_CLIENT;
 381
 382         if (strncmp(buff, BATADV_GW_MODE_SERVER_NAME,
 383                     strlen(BATADV_GW_MODE_SERVER_NAME)) == 0)
 384                 gw_mode_tmp = BATADV_GW_MODE_SERVER;
 385
 386         if (gw_mode_tmp < 0) {
 387                 batadv_info(net_dev,
 388                             "Invalid parameter for 'gw mode' setting received: %s\n",
 389                             buff);
 390                 return -EINVAL;
 391         }
 392
 393         if (atomic_read(&bat_priv->gw_mode) == gw_mode_tmp)
 394                 return count;
 395
 396         switch (atomic_read(&bat_priv->gw_mode)) {
 397         case BATADV_GW_MODE_CLIENT:
 398                 curr_gw_mode_str = BATADV_GW_MODE_CLIENT_NAME;
 399                 break;
 400         case BATADV_GW_MODE_SERVER:
 401                 curr_gw_mode_str = BATADV_GW_MODE_SERVER_NAME;
 402                 break;
 403         default:
 404                 curr_gw_mode_str = BATADV_GW_MODE_OFF_NAME;
 405                 break;
 406         }
 407
 408         batadv_info(net_dev, "Changing gw mode from: %s to: %s\n",
 409                     curr_gw_mode_str, buff);
 410
 411         batadv_gw_deselect(bat_priv);
 412         /* always call batadv_gw_check_client_stop() before changing the gateway
 413          * state
 414          */
 415         batadv_gw_check_client_stop(bat_priv);
 416         atomic_set(&bat_priv->gw_mode, (unsigned int)gw_mode_tmp);
 417         batadv_gw_tvlv_container_update(bat_priv);
 418         return count;
 419 }
 420
 421 static ssize_t batadv_show_gw_bwidth(struct kobject *kobj,
 422                                      struct attribute *attr, char *buff)
 423 {
 424         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 425         uint32_t down, up;
 426
 427         down = atomic_read(&bat_priv->gw.bandwidth_down);
 428         up = atomic_read(&bat_priv->gw.bandwidth_up);
 429
 430         return sprintf(buff, "%u.%u/%u.%u MBit\n", down / 10,
 431                        down % 10, up / 10, up % 10);
 432 }
 433
 434 static ssize_t batadv_store_gw_bwidth(struct kobject *kobj,
 435                                       struct attribute *attr, char *buff,
 436                                       size_t count)
 437 {
 438         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 439
 440         if (buff[count - 1] == '\n')
 441                 buff[count - 1] = '\0';
 442
 443         return batadv_gw_bandwidth_set(net_dev, buff, count);
 444 }
 445
 446 BATADV_ATTR_SIF_BOOL(aggregated_ogms, S_IRUGO | S_IWUSR, NULL);
 447 BATADV_ATTR_SIF_BOOL(bonding, S_IRUGO | S_IWUSR, NULL);
 448 #ifdef CONFIG_BATMAN_ADV_BLA
 449 BATADV_ATTR_SIF_BOOL(bridge_loop_avoidance, S_IRUGO | S_IWUSR, NULL);
 450 #endif
 451 #ifdef CONFIG_BATMAN_ADV_DAT
 452 BATADV_ATTR_SIF_BOOL(distributed_arp_table, S_IRUGO | S_IWUSR,
 453                      batadv_dat_status_update);
 454 #endif
 455 BATADV_ATTR_SIF_BOOL(fragmentation, S_IRUGO | S_IWUSR, batadv_update_min_mtu);
 456 static BATADV_ATTR(routing_algo, S_IRUGO, batadv_show_bat_algo, NULL);
 457 static BATADV_ATTR(gw_mode, S_IRUGO | S_IWUSR, batadv_show_gw_mode,
 458                    batadv_store_gw_mode);
 459 BATADV_ATTR_SIF_UINT(orig_interval, S_IRUGO | S_IWUSR, 2 * BATADV_JITTER,
 460                      INT_MAX, NULL);
 461 BATADV_ATTR_SIF_UINT(hop_penalty, S_IRUGO | S_IWUSR, 0, BATADV_TQ_MAX_VALUE,
 462                      NULL);
 463 BATADV_ATTR_SIF_UINT(gw_sel_class, S_IRUGO | S_IWUSR, 1, BATADV_TQ_MAX_VALUE,
 464                      batadv_post_gw_deselect);
 465 static BATADV_ATTR(gw_bandwidth, S_IRUGO | S_IWUSR, batadv_show_gw_bwidth,
 466                    batadv_store_gw_bwidth);
 467 #ifdef CONFIG_BATMAN_ADV_DEBUG
 468 BATADV_ATTR_SIF_UINT(log_level, S_IRUGO | S_IWUSR, 0, BATADV_DBG_ALL, NULL);
 469 #endif
 470 #ifdef CONFIG_BATMAN_ADV_NC
 471 BATADV_ATTR_SIF_BOOL(network_coding, S_IRUGO | S_IWUSR,
 472                      batadv_nc_status_update);
 473 #endif
 474
 475 static struct batadv_attribute *batadv_mesh_attrs[] = {
 476         &batadv_attr_aggregated_ogms,
 477         &batadv_attr_bonding,
 478 #ifdef CONFIG_BATMAN_ADV_BLA
 479         &batadv_attr_bridge_loop_avoidance,
 480 #endif
 481 #ifdef CONFIG_BATMAN_ADV_DAT
 482         &batadv_attr_distributed_arp_table,
 483 #endif
 484         &batadv_attr_fragmentation,
 485         &batadv_attr_routing_algo,
 486         &batadv_attr_gw_mode,
 487         &batadv_attr_orig_interval,
 488         &batadv_attr_hop_penalty,
 489         &batadv_attr_gw_sel_class,
 490         &batadv_attr_gw_bandwidth,
 491 #ifdef CONFIG_BATMAN_ADV_DEBUG
 492         &batadv_attr_log_level,
 493 #endif
 494 #ifdef CONFIG_BATMAN_ADV_NC
 495         &batadv_attr_network_coding,
 496 #endif
 497         NULL,
 498 };
 499
 500 BATADV_ATTR_VLAN_BOOL(ap_isolation, S_IRUGO | S_IWUSR, NULL);
 501
 502 /**
 503  * batadv_vlan_attrs - array of vlan specific sysfs attributes
 504  */
 505 static struct batadv_attribute *batadv_vlan_attrs[] = {
 506         &batadv_attr_vlan_ap_isolation,
 507         NULL,
 508 };
 509
 510 int batadv_sysfs_add_meshif(struct net_device *dev)
 511 {
 512         struct kobject *batif_kobject = &dev->dev.kobj;
 513         struct batadv_priv *bat_priv = netdev_priv(dev);
 514         struct batadv_attribute **bat_attr;
 515         int err;
 516
 517         bat_priv->mesh_obj = kobject_create_and_add(BATADV_SYSFS_IF_MESH_SUBDIR,
 518                                                     batif_kobject);
 519         if (!bat_priv->mesh_obj) {
 520                 batadv_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
 521                            BATADV_SYSFS_IF_MESH_SUBDIR);
 522                 goto out;
 523         }
 524
 525         for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr) {
 526                 err = sysfs_create_file(bat_priv->mesh_obj,
 527                                         &((*bat_attr)->attr));
 528                 if (err) {
 529                         batadv_err(dev, "Can't add sysfs file: %s/%s/%s\n",
 530                                    dev->name, BATADV_SYSFS_IF_MESH_SUBDIR,
 531                                    ((*bat_attr)->attr).name);
 532                         goto rem_attr;
 533                 }
 534         }
 535
 536         return 0;
 537
 538 rem_attr:
 539         for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr)
 540                 sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
 541
 542         kobject_put(bat_priv->mesh_obj);
 543         bat_priv->mesh_obj = NULL;
 544 out:
 545         return -ENOMEM;
 546 }
 547
 548 void batadv_sysfs_del_meshif(struct net_device *dev)
 549 {
 550         struct batadv_priv *bat_priv = netdev_priv(dev);
 551         struct batadv_attribute **bat_attr;
 552
 553         for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr)
 554                 sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
 555
 556         kobject_put(bat_priv->mesh_obj);
 557         bat_priv->mesh_obj = NULL;
 558 }
 559
 560 /**
 561  * batadv_sysfs_add_vlan - add all the needed sysfs objects for the new vlan
 562  * @dev: netdev of the mesh interface
 563  * @vlan: private data of the newly added VLAN interface
 564  *
 565  * Returns 0 on success and -ENOMEM if any of the structure allocations fails.
 566  */
 567 int batadv_sysfs_add_vlan(struct net_device *dev,
 568                           struct batadv_softif_vlan *vlan)
 569 {
 570         char vlan_subdir[sizeof(BATADV_SYSFS_VLAN_SUBDIR_PREFIX) + 5];
 571         struct batadv_priv *bat_priv = netdev_priv(dev);
 572         struct batadv_attribute **bat_attr;
 573         int err;
 574
 575         if (vlan->vid & BATADV_VLAN_HAS_TAG) {
 576                 sprintf(vlan_subdir, BATADV_SYSFS_VLAN_SUBDIR_PREFIX "%hu",
 577                         vlan->vid & VLAN_VID_MASK);
 578
 579                 vlan->kobj = kobject_create_and_add(vlan_subdir,
 580                                                     bat_priv->mesh_obj);
 581                 if (!vlan->kobj) {
 582                         batadv_err(dev, "Can't add sysfs directory: %s/%s\n",
 583                                    dev->name, vlan_subdir);
 584                         goto out;
 585                 }
 586         } else {
 587                 /* the untagged LAN uses the root folder to store its "VLAN
 588                  * specific attributes"
 589                  */
 590                 vlan->kobj = bat_priv->mesh_obj;
 591                 kobject_get(bat_priv->mesh_obj);
 592         }
 593
 594         for (bat_attr = batadv_vlan_attrs; *bat_attr; ++bat_attr) {
 595                 err = sysfs_create_file(vlan->kobj,
 596                                         &((*bat_attr)->attr));
 597                 if (err) {
 598                         batadv_err(dev, "Can't add sysfs file: %s/%s/%s\n",
 599                                    dev->name, vlan_subdir,
 600                                    ((*bat_attr)->attr).name);
 601                         goto rem_attr;
 602                 }
 603         }
 604
 605         return 0;
 606
 607 rem_attr:
 608         for (bat_attr = batadv_vlan_attrs; *bat_attr; ++bat_attr)
 609                 sysfs_remove_file(vlan->kobj, &((*bat_attr)->attr));
 610
 611         kobject_put(vlan->kobj);
 612         vlan->kobj = NULL;
 613 out:
 614         return -ENOMEM;
 615 }
 616
 617 /**
 618  * batadv_sysfs_del_vlan - remove all the sysfs objects for a given VLAN
 619  * @bat_priv: the bat priv with all the soft interface information
 620  * @vlan: the private data of the VLAN to destroy
 621  */
 622 void batadv_sysfs_del_vlan(struct batadv_priv *bat_priv,
 623                            struct batadv_softif_vlan *vlan)
 624 {
 625         struct batadv_attribute **bat_attr;
 626
 627         for (bat_attr = batadv_vlan_attrs; *bat_attr; ++bat_attr)
 628                 sysfs_remove_file(vlan->kobj, &((*bat_attr)->attr));
 629
 630         kobject_put(vlan->kobj);
 631         vlan->kobj = NULL;
 632 }
 633
 634 static ssize_t batadv_show_mesh_iface(struct kobject *kobj,
 635                                       struct attribute *attr, char *buff)
 636 {
 637         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 638         struct batadv_hard_iface *hard_iface;
 639         ssize_t length;
 640         const char *ifname;
 641
 642         hard_iface = batadv_hardif_get_by_netdev(net_dev);
 643         if (!hard_iface)
 644                 return 0;
 645
 646         if (hard_iface->if_status == BATADV_IF_NOT_IN_USE)
 647                 ifname =  "none";
 648         else
 649                 ifname = hard_iface->soft_iface->name;
 650
 651         length = sprintf(buff, "%s\n", ifname);
 652
 653         batadv_hardif_free_ref(hard_iface);
 654
 655         return length;
 656 }
 657
 658 static ssize_t batadv_store_mesh_iface(struct kobject *kobj,
 659                                        struct attribute *attr, char *buff,
 660                                        size_t count)
 661 {
 662         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 663         struct batadv_hard_iface *hard_iface;
 664         int status_tmp = -1;
 665         int ret = count;
 666
 667         hard_iface = batadv_hardif_get_by_netdev(net_dev);
 668         if (!hard_iface)
 669                 return count;
 670
 671         if (buff[count - 1] == '\n')
 672                 buff[count - 1] = '\0';
 673
 674         if (strlen(buff) >= IFNAMSIZ) {
 675                 pr_err("Invalid parameter for 'mesh_iface' setting received: interface name too long '%s'\n",
 676                        buff);
 677                 batadv_hardif_free_ref(hard_iface);
 678                 return -EINVAL;
 679         }
 680
 681         if (strncmp(buff, "none", 4) == 0)
 682                 status_tmp = BATADV_IF_NOT_IN_USE;
 683         else
 684                 status_tmp = BATADV_IF_I_WANT_YOU;
 685
 686         if (hard_iface->if_status == status_tmp)
 687                 goto out;
 688
 689         if ((hard_iface->soft_iface) &&
 690             (strncmp(hard_iface->soft_iface->name, buff, IFNAMSIZ) == 0))
 691                 goto out;
 692
 693         rtnl_lock();
 694
 695         if (status_tmp == BATADV_IF_NOT_IN_USE) {
 696                 batadv_hardif_disable_interface(hard_iface,
 697                                                 BATADV_IF_CLEANUP_AUTO);
 698                 goto unlock;
 699         }
 700
 701         /* if the interface already is in use */
 702         if (hard_iface->if_status != BATADV_IF_NOT_IN_USE)
 703                 batadv_hardif_disable_interface(hard_iface,
 704                                                 BATADV_IF_CLEANUP_AUTO);
 705
 706         ret = batadv_hardif_enable_interface(hard_iface, buff);
 707
 708 unlock:
 709         rtnl_unlock();
 710 out:
 711         batadv_hardif_free_ref(hard_iface);
 712         return ret;
 713 }
 714
 715 static ssize_t batadv_show_iface_status(struct kobject *kobj,
 716                                         struct attribute *attr, char *buff)
 717 {
 718         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 719         struct batadv_hard_iface *hard_iface;
 720         ssize_t length;
 721
 722         hard_iface = batadv_hardif_get_by_netdev(net_dev);
 723         if (!hard_iface)
 724                 return 0;
 725
 726         switch (hard_iface->if_status) {
 727         case BATADV_IF_TO_BE_REMOVED:
 728                 length = sprintf(buff, "disabling\n");
 729                 break;
 730         case BATADV_IF_INACTIVE:
 731                 length = sprintf(buff, "inactive\n");
 732                 break;
 733         case BATADV_IF_ACTIVE:
 734                 length = sprintf(buff, "active\n");
 735                 break;
 736         case BATADV_IF_TO_BE_ACTIVATED:
 737                 length = sprintf(buff, "enabling\n");
 738                 break;
 739         case BATADV_IF_NOT_IN_USE:
 740         default:
 741                 length = sprintf(buff, "not in use\n");
 742                 break;
 743         }
 744
 745         batadv_hardif_free_ref(hard_iface);
 746
 747         return length;
 748 }
 749
 750 static BATADV_ATTR(mesh_iface, S_IRUGO | S_IWUSR, batadv_show_mesh_iface,
 751                    batadv_store_mesh_iface);
 752 static BATADV_ATTR(iface_status, S_IRUGO, batadv_show_iface_status, NULL);
 753
 754 static struct batadv_attribute *batadv_batman_attrs[] = {
 755         &batadv_attr_mesh_iface,
 756         &batadv_attr_iface_status,
 757         NULL,
 758 };
 759
 760 int batadv_sysfs_add_hardif(struct kobject **hardif_obj, struct net_device *dev)
 761 {
 762         struct kobject *hardif_kobject = &dev->dev.kobj;
 763         struct batadv_attribute **bat_attr;
 764         int err;
 765
 766         *hardif_obj = kobject_create_and_add(BATADV_SYSFS_IF_BAT_SUBDIR,
 767                                              hardif_kobject);
 768
 769         if (!*hardif_obj) {
 770                 batadv_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
 771                            BATADV_SYSFS_IF_BAT_SUBDIR);
 772                 goto out;
 773         }
 774
 775         for (bat_attr = batadv_batman_attrs; *bat_attr; ++bat_attr) {
 776                 err = sysfs_create_file(*hardif_obj, &((*bat_attr)->attr));
 777                 if (err) {
 778                         batadv_err(dev, "Can't add sysfs file: %s/%s/%s\n",
 779                                    dev->name, BATADV_SYSFS_IF_BAT_SUBDIR,
 780                                    ((*bat_attr)->attr).name);
 781                         goto rem_attr;
 782                 }
 783         }
 784
 785         return 0;
 786
 787 rem_attr:
 788         for (bat_attr = batadv_batman_attrs; *bat_attr; ++bat_attr)
 789                 sysfs_remove_file(*hardif_obj, &((*bat_attr)->attr));
 790 out:
 791         return -ENOMEM;
 792 }
 793
 794 void batadv_sysfs_del_hardif(struct kobject **hardif_obj)
 795 {
 796         kobject_put(*hardif_obj);
 797         *hardif_obj = NULL;
 798 }
 799
 800 int batadv_throw_uevent(struct batadv_priv *bat_priv, enum batadv_uev_type type,
 801                         enum batadv_uev_action action, const char *data)
 802 {
 803         int ret = -ENOMEM;
 804         struct kobject *bat_kobj;
 805         char *uevent_env[4] = { NULL, NULL, NULL, NULL };
 806
 807         bat_kobj = &bat_priv->soft_iface->dev.kobj;
 808
 809         uevent_env[0] = kmalloc(strlen(BATADV_UEV_TYPE_VAR) +
 810                                 strlen(batadv_uev_type_str[type]) + 1,
 811                                 GFP_ATOMIC);
 812         if (!uevent_env[0])
 813                 goto out;
 814
 815         sprintf(uevent_env[0], "%s%s", BATADV_UEV_TYPE_VAR,
 816                 batadv_uev_type_str[type]);
 817
 818         uevent_env[1] = kmalloc(strlen(BATADV_UEV_ACTION_VAR) +
 819                                 strlen(batadv_uev_action_str[action]) + 1,
 820                                 GFP_ATOMIC);
 821         if (!uevent_env[1])
 822                 goto out;
 823
 824         sprintf(uevent_env[1], "%s%s", BATADV_UEV_ACTION_VAR,
 825                 batadv_uev_action_str[action]);
 826
 827         /* If the event is DEL, ignore the data field */
 828         if (action != BATADV_UEV_DEL) {
 829                 uevent_env[2] = kmalloc(strlen(BATADV_UEV_DATA_VAR) +
 830                                         strlen(data) + 1, GFP_ATOMIC);
 831                 if (!uevent_env[2])
 832                         goto out;
 833
 834                 sprintf(uevent_env[2], "%s%s", BATADV_UEV_DATA_VAR, data);
 835         }
 836
 837         ret = kobject_uevent_env(bat_kobj, KOBJ_CHANGE, uevent_env);
 838 out:
 839         kfree(uevent_env[0]);
 840         kfree(uevent_env[1]);
 841         kfree(uevent_env[2]);
 842
 843         if (ret)
 844                 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
 845                            "Impossible to send uevent for (%s,%s,%s) event (err: %d)\n",
 846                            batadv_uev_type_str[type],
 847                            batadv_uev_action_str[action],
 848                            (action == BATADV_UEV_DEL ? "NULL" : data), ret);
 849         return ret;
 850 }