net/batman-adv/sysfs.c

   1 /* Copyright (C) 2010-2014 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 "main.h"
  19 #include "sysfs.h"
  20 #include "translation-table.h"
  21 #include "distributed-arp-table.h"
  22 #include "network-coding.h"
  23 #include "originator.h"
  24 #include "hard-interface.h"
  25 #include "soft-interface.h"
  26 #include "gateway_common.h"
  27 #include "gateway_client.h"
  28
  29 static struct net_device *batadv_kobj_to_netdev(struct kobject *obj)
  30 {
  31         struct device *dev = container_of(obj->parent, struct device, kobj);
  32
  33         return to_net_dev(dev);
  34 }
  35
  36 static struct batadv_priv *batadv_kobj_to_batpriv(struct kobject *obj)
  37 {
  38         struct net_device *net_dev = batadv_kobj_to_netdev(obj);
  39
  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                                                                         \
 130         return __batadv_store_bool_attr(buff, count, _post_func, attr,  \
 131                                         &bat_priv->_name, net_dev);     \
 132 }
 133
 134 #define BATADV_ATTR_SIF_SHOW_BOOL(_name)                                \
 135 ssize_t batadv_show_##_name(struct kobject *kobj,                       \
 136                             struct attribute *attr, char *buff)         \
 137 {                                                                       \
 138         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);    \
 139                                                                         \
 140         return sprintf(buff, "%s\n",                                    \
 141                        atomic_read(&bat_priv->_name) == 0 ?             \
 142                        "disabled" : "enabled");                         \
 143 }                                                                       \
 144
 145 /* Use this, if you are going to turn a [name] in the soft-interface
 146  * (bat_priv) on or off
 147  */
 148 #define BATADV_ATTR_SIF_BOOL(_name, _mode, _post_func)                  \
 149         static BATADV_ATTR_SIF_STORE_BOOL(_name, _post_func)            \
 150         static BATADV_ATTR_SIF_SHOW_BOOL(_name)                         \
 151         static BATADV_ATTR(_name, _mode, batadv_show_##_name,           \
 152                            batadv_store_##_name)
 153
 154 #define BATADV_ATTR_SIF_STORE_UINT(_name, _min, _max, _post_func)       \
 155 ssize_t batadv_store_##_name(struct kobject *kobj,                      \
 156                              struct attribute *attr, char *buff,        \
 157                              size_t count)                              \
 158 {                                                                       \
 159         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);       \
 160         struct batadv_priv *bat_priv = netdev_priv(net_dev);            \
 161                                                                         \
 162         return __batadv_store_uint_attr(buff, count, _min, _max,        \
 163                                         _post_func, attr,               \
 164                                         &bat_priv->_name, net_dev);     \
 165 }
 166
 167 #define BATADV_ATTR_SIF_SHOW_UINT(_name)                                \
 168 ssize_t batadv_show_##_name(struct kobject *kobj,                       \
 169                             struct attribute *attr, char *buff)         \
 170 {                                                                       \
 171         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);    \
 172                                                                         \
 173         return sprintf(buff, "%i\n", atomic_read(&bat_priv->_name));    \
 174 }                                                                       \
 175
 176 /* Use this, if you are going to set [name] in the soft-interface
 177  * (bat_priv) to an unsigned integer value
 178  */
 179 #define BATADV_ATTR_SIF_UINT(_name, _mode, _min, _max, _post_func)      \
 180         static BATADV_ATTR_SIF_STORE_UINT(_name, _min, _max, _post_func)\
 181         static BATADV_ATTR_SIF_SHOW_UINT(_name)                         \
 182         static BATADV_ATTR(_name, _mode, batadv_show_##_name,           \
 183                            batadv_store_##_name)
 184
 185 #define BATADV_ATTR_VLAN_STORE_BOOL(_name, _post_func)                  \
 186 ssize_t batadv_store_vlan_##_name(struct kobject *kobj,                 \
 187                                   struct attribute *attr, char *buff,   \
 188                                   size_t count)                         \
 189 {                                                                       \
 190         struct batadv_priv *bat_priv = batadv_vlan_kobj_to_batpriv(kobj);\
 191         struct batadv_softif_vlan *vlan = batadv_kobj_to_vlan(bat_priv, \
 192                                                               kobj);    \
 193         size_t res = __batadv_store_bool_attr(buff, count, _post_func,  \
 194                                               attr, &vlan->_name,       \
 195                                               bat_priv->soft_iface);    \
 196                                                                         \
 197         batadv_softif_vlan_free_ref(vlan);                              \
 198         return res;                                                     \
 199 }
 200
 201 #define BATADV_ATTR_VLAN_SHOW_BOOL(_name)                               \
 202 ssize_t batadv_show_vlan_##_name(struct kobject *kobj,                  \
 203                                  struct attribute *attr, char *buff)    \
 204 {                                                                       \
 205         struct batadv_priv *bat_priv = batadv_vlan_kobj_to_batpriv(kobj);\
 206         struct batadv_softif_vlan *vlan = batadv_kobj_to_vlan(bat_priv, \
 207                                                               kobj);    \
 208         size_t res = sprintf(buff, "%s\n",                              \
 209                              atomic_read(&vlan->_name) == 0 ?           \
 210                              "disabled" : "enabled");                   \
 211                                                                         \
 212         batadv_softif_vlan_free_ref(vlan);                              \
 213         return res;                                                     \
 214 }
 215
 216 /* Use this, if you are going to turn a [name] in the vlan struct on or off */
 217 #define BATADV_ATTR_VLAN_BOOL(_name, _mode, _post_func)                 \
 218         static BATADV_ATTR_VLAN_STORE_BOOL(_name, _post_func)           \
 219         static BATADV_ATTR_VLAN_SHOW_BOOL(_name)                        \
 220         static BATADV_ATTR_VLAN(_name, _mode, batadv_show_vlan_##_name, \
 221                                 batadv_store_vlan_##_name)
 222
 223 static int batadv_store_bool_attr(char *buff, size_t count,
 224                                   struct net_device *net_dev,
 225                                   const char *attr_name, atomic_t *attr)
 226 {
 227         int enabled = -1;
 228
 229         if (buff[count - 1] == '\n')
 230                 buff[count - 1] = '\0';
 231
 232         if ((strncmp(buff, "1", 2) == 0) ||
 233             (strncmp(buff, "enable", 7) == 0) ||
 234             (strncmp(buff, "enabled", 8) == 0))
 235                 enabled = 1;
 236
 237         if ((strncmp(buff, "0", 2) == 0) ||
 238             (strncmp(buff, "disable", 8) == 0) ||
 239             (strncmp(buff, "disabled", 9) == 0))
 240                 enabled = 0;
 241
 242         if (enabled < 0) {
 243                 batadv_info(net_dev, "%s: Invalid parameter received: %s\n",
 244                             attr_name, buff);
 245                 return -EINVAL;
 246         }
 247
 248         if (atomic_read(attr) == enabled)
 249                 return count;
 250
 251         batadv_info(net_dev, "%s: Changing from: %s to: %s\n", attr_name,
 252                     atomic_read(attr) == 1 ? "enabled" : "disabled",
 253                     enabled == 1 ? "enabled" : "disabled");
 254
 255         atomic_set(attr, (unsigned int)enabled);
 256         return count;
 257 }
 258
 259 static inline ssize_t
 260 __batadv_store_bool_attr(char *buff, size_t count,
 261                          void (*post_func)(struct net_device *),
 262                          struct attribute *attr,
 263                          atomic_t *attr_store, struct net_device *net_dev)
 264 {
 265         int ret;
 266
 267         ret = batadv_store_bool_attr(buff, count, net_dev, attr->name,
 268                                      attr_store);
 269         if (post_func && ret)
 270                 post_func(net_dev);
 271
 272         return ret;
 273 }
 274
 275 static int batadv_store_uint_attr(const char *buff, size_t count,
 276                                   struct net_device *net_dev,
 277                                   const char *attr_name,
 278                                   unsigned int min, unsigned int max,
 279                                   atomic_t *attr)
 280 {
 281         unsigned long uint_val;
 282         int ret;
 283
 284         ret = kstrtoul(buff, 10, &uint_val);
 285         if (ret) {
 286                 batadv_info(net_dev, "%s: Invalid parameter received: %s\n",
 287                             attr_name, buff);
 288                 return -EINVAL;
 289         }
 290
 291         if (uint_val < min) {
 292                 batadv_info(net_dev, "%s: Value is too small: %lu min: %u\n",
 293                             attr_name, uint_val, min);
 294                 return -EINVAL;
 295         }
 296
 297         if (uint_val > max) {
 298                 batadv_info(net_dev, "%s: Value is too big: %lu max: %u\n",
 299                             attr_name, uint_val, max);
 300                 return -EINVAL;
 301         }
 302
 303         if (atomic_read(attr) == uint_val)
 304                 return count;
 305
 306         batadv_info(net_dev, "%s: Changing from: %i to: %lu\n",
 307                     attr_name, atomic_read(attr), uint_val);
 308
 309         atomic_set(attr, uint_val);
 310         return count;
 311 }
 312
 313 static inline ssize_t
 314 __batadv_store_uint_attr(const char *buff, size_t count,
 315                          int min, int max,
 316                          void (*post_func)(struct net_device *),
 317                          const struct attribute *attr,
 318                          atomic_t *attr_store, struct net_device *net_dev)
 319 {
 320         int ret;
 321
 322         ret = batadv_store_uint_attr(buff, count, net_dev, attr->name, min, max,
 323                                      attr_store);
 324         if (post_func && ret)
 325                 post_func(net_dev);
 326
 327         return ret;
 328 }
 329
 330 static ssize_t batadv_show_bat_algo(struct kobject *kobj,
 331                                     struct attribute *attr, char *buff)
 332 {
 333         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 334
 335         return sprintf(buff, "%s\n", bat_priv->bat_algo_ops->name);
 336 }
 337
 338 static void batadv_post_gw_reselect(struct net_device *net_dev)
 339 {
 340         struct batadv_priv *bat_priv = netdev_priv(net_dev);
 341
 342         batadv_gw_reselect(bat_priv);
 343 }
 344
 345 static ssize_t batadv_show_gw_mode(struct kobject *kobj, struct attribute *attr,
 346                                    char *buff)
 347 {
 348         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 349         int bytes_written;
 350
 351         switch (atomic_read(&bat_priv->gw_mode)) {
 352         case BATADV_GW_MODE_CLIENT:
 353                 bytes_written = sprintf(buff, "%s\n",
 354                                         BATADV_GW_MODE_CLIENT_NAME);
 355                 break;
 356         case BATADV_GW_MODE_SERVER:
 357                 bytes_written = sprintf(buff, "%s\n",
 358                                         BATADV_GW_MODE_SERVER_NAME);
 359                 break;
 360         default:
 361                 bytes_written = sprintf(buff, "%s\n",
 362                                         BATADV_GW_MODE_OFF_NAME);
 363                 break;
 364         }
 365
 366         return bytes_written;
 367 }
 368
 369 static ssize_t batadv_store_gw_mode(struct kobject *kobj,
 370                                     struct attribute *attr, char *buff,
 371                                     size_t count)
 372 {
 373         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 374         struct batadv_priv *bat_priv = netdev_priv(net_dev);
 375         char *curr_gw_mode_str;
 376         int gw_mode_tmp = -1;
 377
 378         if (buff[count - 1] == '\n')
 379                 buff[count - 1] = '\0';
 380
 381         if (strncmp(buff, BATADV_GW_MODE_OFF_NAME,
 382                     strlen(BATADV_GW_MODE_OFF_NAME)) == 0)
 383                 gw_mode_tmp = BATADV_GW_MODE_OFF;
 384
 385         if (strncmp(buff, BATADV_GW_MODE_CLIENT_NAME,
 386                     strlen(BATADV_GW_MODE_CLIENT_NAME)) == 0)
 387                 gw_mode_tmp = BATADV_GW_MODE_CLIENT;
 388
 389         if (strncmp(buff, BATADV_GW_MODE_SERVER_NAME,
 390                     strlen(BATADV_GW_MODE_SERVER_NAME)) == 0)
 391                 gw_mode_tmp = BATADV_GW_MODE_SERVER;
 392
 393         if (gw_mode_tmp < 0) {
 394                 batadv_info(net_dev,
 395                             "Invalid parameter for 'gw mode' setting received: %s\n",
 396                             buff);
 397                 return -EINVAL;
 398         }
 399
 400         if (atomic_read(&bat_priv->gw_mode) == gw_mode_tmp)
 401                 return count;
 402
 403         switch (atomic_read(&bat_priv->gw_mode)) {
 404         case BATADV_GW_MODE_CLIENT:
 405                 curr_gw_mode_str = BATADV_GW_MODE_CLIENT_NAME;
 406                 break;
 407         case BATADV_GW_MODE_SERVER:
 408                 curr_gw_mode_str = BATADV_GW_MODE_SERVER_NAME;
 409                 break;
 410         default:
 411                 curr_gw_mode_str = BATADV_GW_MODE_OFF_NAME;
 412                 break;
 413         }
 414
 415         batadv_info(net_dev, "Changing gw mode from: %s to: %s\n",
 416                     curr_gw_mode_str, buff);
 417
 418         /* Invoking batadv_gw_reselect() is not enough to really de-select the
 419          * current GW. It will only instruct the gateway client code to perform
 420          * a re-election the next time that this is needed.
 421          *
 422          * When gw client mode is being switched off the current GW must be
 423          * de-selected explicitly otherwise no GW_ADD uevent is thrown on
 424          * client mode re-activation. This is operation is performed in
 425          * batadv_gw_check_client_stop().
 426          */
 427         batadv_gw_reselect(bat_priv);
 428         /* always call batadv_gw_check_client_stop() before changing the gateway
 429          * state
 430          */
 431         batadv_gw_check_client_stop(bat_priv);
 432         atomic_set(&bat_priv->gw_mode, (unsigned int)gw_mode_tmp);
 433         batadv_gw_tvlv_container_update(bat_priv);
 434         return count;
 435 }
 436
 437 static ssize_t batadv_show_gw_bwidth(struct kobject *kobj,
 438                                      struct attribute *attr, char *buff)
 439 {
 440         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 441         uint32_t down, up;
 442
 443         down = atomic_read(&bat_priv->gw.bandwidth_down);
 444         up = atomic_read(&bat_priv->gw.bandwidth_up);
 445
 446         return sprintf(buff, "%u.%u/%u.%u MBit\n", down / 10,
 447                        down % 10, up / 10, up % 10);
 448 }
 449
 450 static ssize_t batadv_store_gw_bwidth(struct kobject *kobj,
 451                                       struct attribute *attr, char *buff,
 452                                       size_t count)
 453 {
 454         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 455
 456         if (buff[count - 1] == '\n')
 457                 buff[count - 1] = '\0';
 458
 459         return batadv_gw_bandwidth_set(net_dev, buff, count);
 460 }
 461
 462 /**
 463  * batadv_show_isolation_mark - print the current isolation mark/mask
 464  * @kobj: kobject representing the private mesh sysfs directory
 465  * @attr: the batman-adv attribute the user is interacting with
 466  * @buff: the buffer that will contain the data to send back to the user
 467  *
 468  * Returns the number of bytes written into 'buff' on success or a negative
 469  * error code in case of failure
 470  */
 471 static ssize_t batadv_show_isolation_mark(struct kobject *kobj,
 472                                           struct attribute *attr, char *buff)
 473 {
 474         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 475
 476         return sprintf(buff, "%#.8x/%#.8x\n", bat_priv->isolation_mark,
 477                        bat_priv->isolation_mark_mask);
 478 }
 479
 480 /**
 481  * batadv_store_isolation_mark - parse and store the isolation mark/mask entered
 482  *  by the user
 483  * @kobj: kobject representing the private mesh sysfs directory
 484  * @attr: the batman-adv attribute the user is interacting with
 485  * @buff: the buffer containing the user data
 486  * @count: number of bytes in the buffer
 487  *
 488  * Returns 'count' on success or a negative error code in case of failure
 489  */
 490 static ssize_t batadv_store_isolation_mark(struct kobject *kobj,
 491                                            struct attribute *attr, char *buff,
 492                                            size_t count)
 493 {
 494         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 495         struct batadv_priv *bat_priv = netdev_priv(net_dev);
 496         uint32_t mark, mask;
 497         char *mask_ptr;
 498
 499         /* parse the mask if it has been specified, otherwise assume the mask is
 500          * the biggest possible
 501          */
 502         mask = 0xFFFFFFFF;
 503         mask_ptr = strchr(buff, '/');
 504         if (mask_ptr) {
 505                 *mask_ptr = '\0';
 506                 mask_ptr++;
 507
 508                 /* the mask must be entered in hex base as it is going to be a
 509                  * bitmask and not a prefix length
 510                  */
 511                 if (kstrtou32(mask_ptr, 16, &mask) < 0)
 512                         return -EINVAL;
 513         }
 514
 515         /* the mark can be entered in any base */
 516         if (kstrtou32(buff, 0, &mark) < 0)
 517                 return -EINVAL;
 518
 519         bat_priv->isolation_mark_mask = mask;
 520         /* erase bits not covered by the mask */
 521         bat_priv->isolation_mark = mark & bat_priv->isolation_mark_mask;
 522
 523         batadv_info(net_dev,
 524                     "New skb mark for extended isolation: %#.8x/%#.8x\n",
 525                     bat_priv->isolation_mark, bat_priv->isolation_mark_mask);
 526
 527         return count;
 528 }
 529
 530 BATADV_ATTR_SIF_BOOL(aggregated_ogms, S_IRUGO | S_IWUSR, NULL);
 531 BATADV_ATTR_SIF_BOOL(bonding, S_IRUGO | S_IWUSR, NULL);
 532 #ifdef CONFIG_BATMAN_ADV_BLA
 533 BATADV_ATTR_SIF_BOOL(bridge_loop_avoidance, S_IRUGO | S_IWUSR, NULL);
 534 #endif
 535 #ifdef CONFIG_BATMAN_ADV_DAT
 536 BATADV_ATTR_SIF_BOOL(distributed_arp_table, S_IRUGO | S_IWUSR,
 537                      batadv_dat_status_update);
 538 #endif
 539 BATADV_ATTR_SIF_BOOL(fragmentation, S_IRUGO | S_IWUSR, batadv_update_min_mtu);
 540 static BATADV_ATTR(routing_algo, S_IRUGO, batadv_show_bat_algo, NULL);
 541 static BATADV_ATTR(gw_mode, S_IRUGO | S_IWUSR, batadv_show_gw_mode,
 542                    batadv_store_gw_mode);
 543 BATADV_ATTR_SIF_UINT(orig_interval, S_IRUGO | S_IWUSR, 2 * BATADV_JITTER,
 544                      INT_MAX, NULL);
 545 BATADV_ATTR_SIF_UINT(hop_penalty, S_IRUGO | S_IWUSR, 0, BATADV_TQ_MAX_VALUE,
 546                      NULL);
 547 BATADV_ATTR_SIF_UINT(gw_sel_class, S_IRUGO | S_IWUSR, 1, BATADV_TQ_MAX_VALUE,
 548                      batadv_post_gw_reselect);
 549 static BATADV_ATTR(gw_bandwidth, S_IRUGO | S_IWUSR, batadv_show_gw_bwidth,
 550                    batadv_store_gw_bwidth);
 551 #ifdef CONFIG_BATMAN_ADV_MCAST
 552 BATADV_ATTR_SIF_BOOL(multicast_mode, S_IRUGO | S_IWUSR, NULL);
 553 #endif
 554 #ifdef CONFIG_BATMAN_ADV_DEBUG
 555 BATADV_ATTR_SIF_UINT(log_level, S_IRUGO | S_IWUSR, 0, BATADV_DBG_ALL, NULL);
 556 #endif
 557 #ifdef CONFIG_BATMAN_ADV_NC
 558 BATADV_ATTR_SIF_BOOL(network_coding, S_IRUGO | S_IWUSR,
 559                      batadv_nc_status_update);
 560 #endif
 561 static BATADV_ATTR(isolation_mark, S_IRUGO | S_IWUSR,
 562                    batadv_show_isolation_mark, batadv_store_isolation_mark);
 563
 564 static struct batadv_attribute *batadv_mesh_attrs[] = {
 565         &batadv_attr_aggregated_ogms,
 566         &batadv_attr_bonding,
 567 #ifdef CONFIG_BATMAN_ADV_BLA
 568         &batadv_attr_bridge_loop_avoidance,
 569 #endif
 570 #ifdef CONFIG_BATMAN_ADV_DAT
 571         &batadv_attr_distributed_arp_table,
 572 #endif
 573 #ifdef CONFIG_BATMAN_ADV_MCAST
 574         &batadv_attr_multicast_mode,
 575 #endif
 576         &batadv_attr_fragmentation,
 577         &batadv_attr_routing_algo,
 578         &batadv_attr_gw_mode,
 579         &batadv_attr_orig_interval,
 580         &batadv_attr_hop_penalty,
 581         &batadv_attr_gw_sel_class,
 582         &batadv_attr_gw_bandwidth,
 583 #ifdef CONFIG_BATMAN_ADV_DEBUG
 584         &batadv_attr_log_level,
 585 #endif
 586 #ifdef CONFIG_BATMAN_ADV_NC
 587         &batadv_attr_network_coding,
 588 #endif
 589         &batadv_attr_isolation_mark,
 590         NULL,
 591 };
 592
 593 BATADV_ATTR_VLAN_BOOL(ap_isolation, S_IRUGO | S_IWUSR, NULL);
 594
 595 /**
 596  * batadv_vlan_attrs - array of vlan specific sysfs attributes
 597  */
 598 static struct batadv_attribute *batadv_vlan_attrs[] = {
 599         &batadv_attr_vlan_ap_isolation,
 600         NULL,
 601 };
 602
 603 int batadv_sysfs_add_meshif(struct net_device *dev)
 604 {
 605         struct kobject *batif_kobject = &dev->dev.kobj;
 606         struct batadv_priv *bat_priv = netdev_priv(dev);
 607         struct batadv_attribute **bat_attr;
 608         int err;
 609
 610         bat_priv->mesh_obj = kobject_create_and_add(BATADV_SYSFS_IF_MESH_SUBDIR,
 611                                                     batif_kobject);
 612         if (!bat_priv->mesh_obj) {
 613                 batadv_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
 614                            BATADV_SYSFS_IF_MESH_SUBDIR);
 615                 goto out;
 616         }
 617
 618         for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr) {
 619                 err = sysfs_create_file(bat_priv->mesh_obj,
 620                                         &((*bat_attr)->attr));
 621                 if (err) {
 622                         batadv_err(dev, "Can't add sysfs file: %s/%s/%s\n",
 623                                    dev->name, BATADV_SYSFS_IF_MESH_SUBDIR,
 624                                    ((*bat_attr)->attr).name);
 625                         goto rem_attr;
 626                 }
 627         }
 628
 629         return 0;
 630
 631 rem_attr:
 632         for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr)
 633                 sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
 634
 635         kobject_put(bat_priv->mesh_obj);
 636         bat_priv->mesh_obj = NULL;
 637 out:
 638         return -ENOMEM;
 639 }
 640
 641 void batadv_sysfs_del_meshif(struct net_device *dev)
 642 {
 643         struct batadv_priv *bat_priv = netdev_priv(dev);
 644         struct batadv_attribute **bat_attr;
 645
 646         for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr)
 647                 sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
 648
 649         kobject_put(bat_priv->mesh_obj);
 650         bat_priv->mesh_obj = NULL;
 651 }
 652
 653 /**
 654  * batadv_sysfs_add_vlan - add all the needed sysfs objects for the new vlan
 655  * @dev: netdev of the mesh interface
 656  * @vlan: private data of the newly added VLAN interface
 657  *
 658  * Returns 0 on success and -ENOMEM if any of the structure allocations fails.
 659  */
 660 int batadv_sysfs_add_vlan(struct net_device *dev,
 661                           struct batadv_softif_vlan *vlan)
 662 {
 663         char vlan_subdir[sizeof(BATADV_SYSFS_VLAN_SUBDIR_PREFIX) + 5];
 664         struct batadv_priv *bat_priv = netdev_priv(dev);
 665         struct batadv_attribute **bat_attr;
 666         int err;
 667
 668         if (vlan->vid & BATADV_VLAN_HAS_TAG) {
 669                 sprintf(vlan_subdir, BATADV_SYSFS_VLAN_SUBDIR_PREFIX "%hu",
 670                         vlan->vid & VLAN_VID_MASK);
 671
 672                 vlan->kobj = kobject_create_and_add(vlan_subdir,
 673                                                     bat_priv->mesh_obj);
 674                 if (!vlan->kobj) {
 675                         batadv_err(dev, "Can't add sysfs directory: %s/%s\n",
 676                                    dev->name, vlan_subdir);
 677                         goto out;
 678                 }
 679         } else {
 680                 /* the untagged LAN uses the root folder to store its "VLAN
 681                  * specific attributes"
 682                  */
 683                 vlan->kobj = bat_priv->mesh_obj;
 684                 kobject_get(bat_priv->mesh_obj);
 685         }
 686
 687         for (bat_attr = batadv_vlan_attrs; *bat_attr; ++bat_attr) {
 688                 err = sysfs_create_file(vlan->kobj,
 689                                         &((*bat_attr)->attr));
 690                 if (err) {
 691                         batadv_err(dev, "Can't add sysfs file: %s/%s/%s\n",
 692                                    dev->name, vlan_subdir,
 693                                    ((*bat_attr)->attr).name);
 694                         goto rem_attr;
 695                 }
 696         }
 697
 698         return 0;
 699
 700 rem_attr:
 701         for (bat_attr = batadv_vlan_attrs; *bat_attr; ++bat_attr)
 702                 sysfs_remove_file(vlan->kobj, &((*bat_attr)->attr));
 703
 704         kobject_put(vlan->kobj);
 705         vlan->kobj = NULL;
 706 out:
 707         return -ENOMEM;
 708 }
 709
 710 /**
 711  * batadv_sysfs_del_vlan - remove all the sysfs objects for a given VLAN
 712  * @bat_priv: the bat priv with all the soft interface information
 713  * @vlan: the private data of the VLAN to destroy
 714  */
 715 void batadv_sysfs_del_vlan(struct batadv_priv *bat_priv,
 716                            struct batadv_softif_vlan *vlan)
 717 {
 718         struct batadv_attribute **bat_attr;
 719
 720         for (bat_attr = batadv_vlan_attrs; *bat_attr; ++bat_attr)
 721                 sysfs_remove_file(vlan->kobj, &((*bat_attr)->attr));
 722
 723         kobject_put(vlan->kobj);
 724         vlan->kobj = NULL;
 725 }
 726
 727 static ssize_t batadv_show_mesh_iface(struct kobject *kobj,
 728                                       struct attribute *attr, char *buff)
 729 {
 730         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 731         struct batadv_hard_iface *hard_iface;
 732         ssize_t length;
 733         const char *ifname;
 734
 735         hard_iface = batadv_hardif_get_by_netdev(net_dev);
 736         if (!hard_iface)
 737                 return 0;
 738
 739         if (hard_iface->if_status == BATADV_IF_NOT_IN_USE)
 740                 ifname =  "none";
 741         else
 742                 ifname = hard_iface->soft_iface->name;
 743
 744         length = sprintf(buff, "%s\n", ifname);
 745
 746         batadv_hardif_free_ref(hard_iface);
 747
 748         return length;
 749 }
 750
 751 static ssize_t batadv_store_mesh_iface(struct kobject *kobj,
 752                                        struct attribute *attr, char *buff,
 753                                        size_t count)
 754 {
 755         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 756         struct batadv_hard_iface *hard_iface;
 757         int status_tmp = -1;
 758         int ret = count;
 759
 760         hard_iface = batadv_hardif_get_by_netdev(net_dev);
 761         if (!hard_iface)
 762                 return count;
 763
 764         if (buff[count - 1] == '\n')
 765                 buff[count - 1] = '\0';
 766
 767         if (strlen(buff) >= IFNAMSIZ) {
 768                 pr_err("Invalid parameter for 'mesh_iface' setting received: interface name too long '%s'\n",
 769                        buff);
 770                 batadv_hardif_free_ref(hard_iface);
 771                 return -EINVAL;
 772         }
 773
 774         if (strncmp(buff, "none", 4) == 0)
 775                 status_tmp = BATADV_IF_NOT_IN_USE;
 776         else
 777                 status_tmp = BATADV_IF_I_WANT_YOU;
 778
 779         if (hard_iface->if_status == status_tmp)
 780                 goto out;
 781
 782         if ((hard_iface->soft_iface) &&
 783             (strncmp(hard_iface->soft_iface->name, buff, IFNAMSIZ) == 0))
 784                 goto out;
 785
 786         rtnl_lock();
 787
 788         if (status_tmp == BATADV_IF_NOT_IN_USE) {
 789                 batadv_hardif_disable_interface(hard_iface,
 790                                                 BATADV_IF_CLEANUP_AUTO);
 791                 goto unlock;
 792         }
 793
 794         /* if the interface already is in use */
 795         if (hard_iface->if_status != BATADV_IF_NOT_IN_USE)
 796                 batadv_hardif_disable_interface(hard_iface,
 797                                                 BATADV_IF_CLEANUP_AUTO);
 798
 799         ret = batadv_hardif_enable_interface(hard_iface, buff);
 800
 801 unlock:
 802         rtnl_unlock();
 803 out:
 804         batadv_hardif_free_ref(hard_iface);
 805         return ret;
 806 }
 807
 808 static ssize_t batadv_show_iface_status(struct kobject *kobj,
 809                                         struct attribute *attr, char *buff)
 810 {
 811         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 812         struct batadv_hard_iface *hard_iface;
 813         ssize_t length;
 814
 815         hard_iface = batadv_hardif_get_by_netdev(net_dev);
 816         if (!hard_iface)
 817                 return 0;
 818
 819         switch (hard_iface->if_status) {
 820         case BATADV_IF_TO_BE_REMOVED:
 821                 length = sprintf(buff, "disabling\n");
 822                 break;
 823         case BATADV_IF_INACTIVE:
 824                 length = sprintf(buff, "inactive\n");
 825                 break;
 826         case BATADV_IF_ACTIVE:
 827                 length = sprintf(buff, "active\n");
 828                 break;
 829         case BATADV_IF_TO_BE_ACTIVATED:
 830                 length = sprintf(buff, "enabling\n");
 831                 break;
 832         case BATADV_IF_NOT_IN_USE:
 833         default:
 834                 length = sprintf(buff, "not in use\n");
 835                 break;
 836         }
 837
 838         batadv_hardif_free_ref(hard_iface);
 839
 840         return length;
 841 }
 842
 843 static BATADV_ATTR(mesh_iface, S_IRUGO | S_IWUSR, batadv_show_mesh_iface,
 844                    batadv_store_mesh_iface);
 845 static BATADV_ATTR(iface_status, S_IRUGO, batadv_show_iface_status, NULL);
 846
 847 static struct batadv_attribute *batadv_batman_attrs[] = {
 848         &batadv_attr_mesh_iface,
 849         &batadv_attr_iface_status,
 850         NULL,
 851 };
 852
 853 int batadv_sysfs_add_hardif(struct kobject **hardif_obj, struct net_device *dev)
 854 {
 855         struct kobject *hardif_kobject = &dev->dev.kobj;
 856         struct batadv_attribute **bat_attr;
 857         int err;
 858
 859         *hardif_obj = kobject_create_and_add(BATADV_SYSFS_IF_BAT_SUBDIR,
 860                                              hardif_kobject);
 861
 862         if (!*hardif_obj) {
 863                 batadv_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
 864                            BATADV_SYSFS_IF_BAT_SUBDIR);
 865                 goto out;
 866         }
 867
 868         for (bat_attr = batadv_batman_attrs; *bat_attr; ++bat_attr) {
 869                 err = sysfs_create_file(*hardif_obj, &((*bat_attr)->attr));
 870                 if (err) {
 871                         batadv_err(dev, "Can't add sysfs file: %s/%s/%s\n",
 872                                    dev->name, BATADV_SYSFS_IF_BAT_SUBDIR,
 873                                    ((*bat_attr)->attr).name);
 874                         goto rem_attr;
 875                 }
 876         }
 877
 878         return 0;
 879
 880 rem_attr:
 881         for (bat_attr = batadv_batman_attrs; *bat_attr; ++bat_attr)
 882                 sysfs_remove_file(*hardif_obj, &((*bat_attr)->attr));
 883 out:
 884         return -ENOMEM;
 885 }
 886
 887 void batadv_sysfs_del_hardif(struct kobject **hardif_obj)
 888 {
 889         kobject_put(*hardif_obj);
 890         *hardif_obj = NULL;
 891 }
 892
 893 int batadv_throw_uevent(struct batadv_priv *bat_priv, enum batadv_uev_type type,
 894                         enum batadv_uev_action action, const char *data)
 895 {
 896         int ret = -ENOMEM;
 897         struct kobject *bat_kobj;
 898         char *uevent_env[4] = { NULL, NULL, NULL, NULL };
 899
 900         bat_kobj = &bat_priv->soft_iface->dev.kobj;
 901
 902         uevent_env[0] = kasprintf(GFP_ATOMIC,
 903                                   "%s%s", BATADV_UEV_TYPE_VAR,
 904                                   batadv_uev_type_str[type]);
 905         if (!uevent_env[0])
 906                 goto out;
 907
 908         uevent_env[1] = kasprintf(GFP_ATOMIC,
 909                                   "%s%s", BATADV_UEV_ACTION_VAR,
 910                                   batadv_uev_action_str[action]);
 911         if (!uevent_env[1])
 912                 goto out;
 913
 914         /* If the event is DEL, ignore the data field */
 915         if (action != BATADV_UEV_DEL) {
 916                 uevent_env[2] = kasprintf(GFP_ATOMIC,
 917                                           "%s%s", BATADV_UEV_DATA_VAR, data);
 918                 if (!uevent_env[2])
 919                         goto out;
 920         }
 921
 922         ret = kobject_uevent_env(bat_kobj, KOBJ_CHANGE, uevent_env);
 923 out:
 924         kfree(uevent_env[0]);
 925         kfree(uevent_env[1]);
 926         kfree(uevent_env[2]);
 927
 928         if (ret)
 929                 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
 930                            "Impossible to send uevent for (%s,%s,%s) event (err: %d)\n",
 931                            batadv_uev_type_str[type],
 932                            batadv_uev_action_str[action],
 933                            (action == BATADV_UEV_DEL ? "NULL" : data), ret);
 934         return ret;
 935 }