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
 155 #define BATADV_ATTR_SIF_STORE_UINT(_name, _min, _max, _post_func)       \
 156 ssize_t batadv_store_##_name(struct kobject *kobj,                      \
 157                              struct attribute *attr, char *buff,        \
 158                              size_t count)                              \
 159 {                                                                       \
 160         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);       \
 161         struct batadv_priv *bat_priv = netdev_priv(net_dev);            \
 162                                                                         \
 163         return __batadv_store_uint_attr(buff, count, _min, _max,        \
 164                                         _post_func, attr,               \
 165                                         &bat_priv->_name, net_dev);     \
 166 }
 167
 168 #define BATADV_ATTR_SIF_SHOW_UINT(_name)                                \
 169 ssize_t batadv_show_##_name(struct kobject *kobj,                       \
 170                             struct attribute *attr, char *buff)         \
 171 {                                                                       \
 172         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);    \
 173                                                                         \
 174         return sprintf(buff, "%i\n", atomic_read(&bat_priv->_name));    \
 175 }                                                                       \
 176
 177 /* Use this, if you are going to set [name] in the soft-interface
 178  * (bat_priv) to an unsigned integer value
 179  */
 180 #define BATADV_ATTR_SIF_UINT(_name, _mode, _min, _max, _post_func)      \
 181         static BATADV_ATTR_SIF_STORE_UINT(_name, _min, _max, _post_func)\
 182         static BATADV_ATTR_SIF_SHOW_UINT(_name)                         \
 183         static BATADV_ATTR(_name, _mode, batadv_show_##_name,           \
 184                            batadv_store_##_name)
 185
 186 #define BATADV_ATTR_VLAN_STORE_BOOL(_name, _post_func)                  \
 187 ssize_t batadv_store_vlan_##_name(struct kobject *kobj,                 \
 188                                   struct attribute *attr, char *buff,   \
 189                                   size_t count)                         \
 190 {                                                                       \
 191         struct batadv_priv *bat_priv = batadv_vlan_kobj_to_batpriv(kobj);\
 192         struct batadv_softif_vlan *vlan = batadv_kobj_to_vlan(bat_priv, \
 193                                                               kobj);    \
 194         size_t res = __batadv_store_bool_attr(buff, count, _post_func,  \
 195                                               attr, &vlan->_name,       \
 196                                               bat_priv->soft_iface);    \
 197                                                                         \
 198         batadv_softif_vlan_free_ref(vlan);                              \
 199         return res;                                                     \
 200 }
 201
 202 #define BATADV_ATTR_VLAN_SHOW_BOOL(_name)                               \
 203 ssize_t batadv_show_vlan_##_name(struct kobject *kobj,                  \
 204                                  struct attribute *attr, char *buff)    \
 205 {                                                                       \
 206         struct batadv_priv *bat_priv = batadv_vlan_kobj_to_batpriv(kobj);\
 207         struct batadv_softif_vlan *vlan = batadv_kobj_to_vlan(bat_priv, \
 208                                                               kobj);    \
 209         size_t res = sprintf(buff, "%s\n",                              \
 210                              atomic_read(&vlan->_name) == 0 ?           \
 211                              "disabled" : "enabled");                   \
 212                                                                         \
 213         batadv_softif_vlan_free_ref(vlan);                              \
 214         return res;                                                     \
 215 }
 216
 217 /* Use this, if you are going to turn a [name] in the vlan struct on or off */
 218 #define BATADV_ATTR_VLAN_BOOL(_name, _mode, _post_func)                 \
 219         static BATADV_ATTR_VLAN_STORE_BOOL(_name, _post_func)           \
 220         static BATADV_ATTR_VLAN_SHOW_BOOL(_name)                        \
 221         static BATADV_ATTR_VLAN(_name, _mode, batadv_show_vlan_##_name, \
 222                                 batadv_store_vlan_##_name)
 223
 224 static int batadv_store_bool_attr(char *buff, size_t count,
 225                                   struct net_device *net_dev,
 226                                   const char *attr_name, atomic_t *attr)
 227 {
 228         int enabled = -1;
 229
 230         if (buff[count - 1] == '\n')
 231                 buff[count - 1] = '\0';
 232
 233         if ((strncmp(buff, "1", 2) == 0) ||
 234             (strncmp(buff, "enable", 7) == 0) ||
 235             (strncmp(buff, "enabled", 8) == 0))
 236                 enabled = 1;
 237
 238         if ((strncmp(buff, "0", 2) == 0) ||
 239             (strncmp(buff, "disable", 8) == 0) ||
 240             (strncmp(buff, "disabled", 9) == 0))
 241                 enabled = 0;
 242
 243         if (enabled < 0) {
 244                 batadv_info(net_dev, "%s: Invalid parameter received: %s\n",
 245                             attr_name, buff);
 246                 return -EINVAL;
 247         }
 248
 249         if (atomic_read(attr) == enabled)
 250                 return count;
 251
 252         batadv_info(net_dev, "%s: Changing from: %s to: %s\n", attr_name,
 253                     atomic_read(attr) == 1 ? "enabled" : "disabled",
 254                     enabled == 1 ? "enabled" : "disabled");
 255
 256         atomic_set(attr, (unsigned int)enabled);
 257         return count;
 258 }
 259
 260 static inline ssize_t
 261 __batadv_store_bool_attr(char *buff, size_t count,
 262                          void (*post_func)(struct net_device *),
 263                          struct attribute *attr,
 264                          atomic_t *attr_store, struct net_device *net_dev)
 265 {
 266         int ret;
 267
 268         ret = batadv_store_bool_attr(buff, count, net_dev, attr->name,
 269                                      attr_store);
 270         if (post_func && ret)
 271                 post_func(net_dev);
 272
 273         return ret;
 274 }
 275
 276 static int batadv_store_uint_attr(const char *buff, size_t count,
 277                                   struct net_device *net_dev,
 278                                   const char *attr_name,
 279                                   unsigned int min, unsigned int max,
 280                                   atomic_t *attr)
 281 {
 282         unsigned long uint_val;
 283         int ret;
 284
 285         ret = kstrtoul(buff, 10, &uint_val);
 286         if (ret) {
 287                 batadv_info(net_dev, "%s: Invalid parameter received: %s\n",
 288                             attr_name, buff);
 289                 return -EINVAL;
 290         }
 291
 292         if (uint_val < min) {
 293                 batadv_info(net_dev, "%s: Value is too small: %lu min: %u\n",
 294                             attr_name, uint_val, min);
 295                 return -EINVAL;
 296         }
 297
 298         if (uint_val > max) {
 299                 batadv_info(net_dev, "%s: Value is too big: %lu max: %u\n",
 300                             attr_name, uint_val, max);
 301                 return -EINVAL;
 302         }
 303
 304         if (atomic_read(attr) == uint_val)
 305                 return count;
 306
 307         batadv_info(net_dev, "%s: Changing from: %i to: %lu\n",
 308                     attr_name, atomic_read(attr), uint_val);
 309
 310         atomic_set(attr, uint_val);
 311         return count;
 312 }
 313
 314 static inline ssize_t
 315 __batadv_store_uint_attr(const char *buff, size_t count,
 316                          int min, int max,
 317                          void (*post_func)(struct net_device *),
 318                          const struct attribute *attr,
 319                          atomic_t *attr_store, struct net_device *net_dev)
 320 {
 321         int ret;
 322
 323         ret = batadv_store_uint_attr(buff, count, net_dev, attr->name, min, max,
 324                                      attr_store);
 325         if (post_func && ret)
 326                 post_func(net_dev);
 327
 328         return ret;
 329 }
 330
 331 static ssize_t batadv_show_bat_algo(struct kobject *kobj,
 332                                     struct attribute *attr, char *buff)
 333 {
 334         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 335
 336         return sprintf(buff, "%s\n", bat_priv->bat_algo_ops->name);
 337 }
 338
 339 static void batadv_post_gw_reselect(struct net_device *net_dev)
 340 {
 341         struct batadv_priv *bat_priv = netdev_priv(net_dev);
 342
 343         batadv_gw_reselect(bat_priv);
 344 }
 345
 346 static ssize_t batadv_show_gw_mode(struct kobject *kobj, struct attribute *attr,
 347                                    char *buff)
 348 {
 349         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 350         int bytes_written;
 351
 352         switch (atomic_read(&bat_priv->gw_mode)) {
 353         case BATADV_GW_MODE_CLIENT:
 354                 bytes_written = sprintf(buff, "%s\n",
 355                                         BATADV_GW_MODE_CLIENT_NAME);
 356                 break;
 357         case BATADV_GW_MODE_SERVER:
 358                 bytes_written = sprintf(buff, "%s\n",
 359                                         BATADV_GW_MODE_SERVER_NAME);
 360                 break;
 361         default:
 362                 bytes_written = sprintf(buff, "%s\n",
 363                                         BATADV_GW_MODE_OFF_NAME);
 364                 break;
 365         }
 366
 367         return bytes_written;
 368 }
 369
 370 static ssize_t batadv_store_gw_mode(struct kobject *kobj,
 371                                     struct attribute *attr, char *buff,
 372                                     size_t count)
 373 {
 374         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 375         struct batadv_priv *bat_priv = netdev_priv(net_dev);
 376         char *curr_gw_mode_str;
 377         int gw_mode_tmp = -1;
 378
 379         if (buff[count - 1] == '\n')
 380                 buff[count - 1] = '\0';
 381
 382         if (strncmp(buff, BATADV_GW_MODE_OFF_NAME,
 383                     strlen(BATADV_GW_MODE_OFF_NAME)) == 0)
 384                 gw_mode_tmp = BATADV_GW_MODE_OFF;
 385
 386         if (strncmp(buff, BATADV_GW_MODE_CLIENT_NAME,
 387                     strlen(BATADV_GW_MODE_CLIENT_NAME)) == 0)
 388                 gw_mode_tmp = BATADV_GW_MODE_CLIENT;
 389
 390         if (strncmp(buff, BATADV_GW_MODE_SERVER_NAME,
 391                     strlen(BATADV_GW_MODE_SERVER_NAME)) == 0)
 392                 gw_mode_tmp = BATADV_GW_MODE_SERVER;
 393
 394         if (gw_mode_tmp < 0) {
 395                 batadv_info(net_dev,
 396                             "Invalid parameter for 'gw mode' setting received: %s\n",
 397                             buff);
 398                 return -EINVAL;
 399         }
 400
 401         if (atomic_read(&bat_priv->gw_mode) == gw_mode_tmp)
 402                 return count;
 403
 404         switch (atomic_read(&bat_priv->gw_mode)) {
 405         case BATADV_GW_MODE_CLIENT:
 406                 curr_gw_mode_str = BATADV_GW_MODE_CLIENT_NAME;
 407                 break;
 408         case BATADV_GW_MODE_SERVER:
 409                 curr_gw_mode_str = BATADV_GW_MODE_SERVER_NAME;
 410                 break;
 411         default:
 412                 curr_gw_mode_str = BATADV_GW_MODE_OFF_NAME;
 413                 break;
 414         }
 415
 416         batadv_info(net_dev, "Changing gw mode from: %s to: %s\n",
 417                     curr_gw_mode_str, buff);
 418
 419         /* Invoking batadv_gw_reselect() is not enough to really de-select the
 420          * current GW. It will only instruct the gateway client code to perform
 421          * a re-election the next time that this is needed.
 422          *
 423          * When gw client mode is being switched off the current GW must be
 424          * de-selected explicitly otherwise no GW_ADD uevent is thrown on
 425          * client mode re-activation. This is operation is performed in
 426          * batadv_gw_check_client_stop().
 427          */
 428         batadv_gw_reselect(bat_priv);
 429         /* always call batadv_gw_check_client_stop() before changing the gateway
 430          * state
 431          */
 432         batadv_gw_check_client_stop(bat_priv);
 433         atomic_set(&bat_priv->gw_mode, (unsigned int)gw_mode_tmp);
 434         batadv_gw_tvlv_container_update(bat_priv);
 435         return count;
 436 }
 437
 438 static ssize_t batadv_show_gw_bwidth(struct kobject *kobj,
 439                                      struct attribute *attr, char *buff)
 440 {
 441         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 442         uint32_t down, up;
 443
 444         down = atomic_read(&bat_priv->gw.bandwidth_down);
 445         up = atomic_read(&bat_priv->gw.bandwidth_up);
 446
 447         return sprintf(buff, "%u.%u/%u.%u MBit\n", down / 10,
 448                        down % 10, up / 10, up % 10);
 449 }
 450
 451 static ssize_t batadv_store_gw_bwidth(struct kobject *kobj,
 452                                       struct attribute *attr, char *buff,
 453                                       size_t count)
 454 {
 455         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 456
 457         if (buff[count - 1] == '\n')
 458                 buff[count - 1] = '\0';
 459
 460         return batadv_gw_bandwidth_set(net_dev, buff, count);
 461 }
 462
 463 /**
 464  * batadv_show_isolation_mark - print the current isolation mark/mask
 465  * @kobj: kobject representing the private mesh sysfs directory
 466  * @attr: the batman-adv attribute the user is interacting with
 467  * @buff: the buffer that will contain the data to send back to the user
 468  *
 469  * Returns the number of bytes written into 'buff' on success or a negative
 470  * error code in case of failure
 471  */
 472 static ssize_t batadv_show_isolation_mark(struct kobject *kobj,
 473                                           struct attribute *attr, char *buff)
 474 {
 475         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 476
 477         return sprintf(buff, "%#.8x/%#.8x\n", bat_priv->isolation_mark,
 478                        bat_priv->isolation_mark_mask);
 479 }
 480
 481 /**
 482  * batadv_store_isolation_mark - parse and store the isolation mark/mask entered
 483  *  by the user
 484  * @kobj: kobject representing the private mesh sysfs directory
 485  * @attr: the batman-adv attribute the user is interacting with
 486  * @buff: the buffer containing the user data
 487  * @count: number of bytes in the buffer
 488  *
 489  * Returns 'count' on success or a negative error code in case of failure
 490  */
 491 static ssize_t batadv_store_isolation_mark(struct kobject *kobj,
 492                                            struct attribute *attr, char *buff,
 493                                            size_t count)
 494 {
 495         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 496         struct batadv_priv *bat_priv = netdev_priv(net_dev);
 497         uint32_t mark, mask;
 498         char *mask_ptr;
 499
 500         /* parse the mask if it has been specified, otherwise assume the mask is
 501          * the biggest possible
 502          */
 503         mask = 0xFFFFFFFF;
 504         mask_ptr = strchr(buff, '/');
 505         if (mask_ptr) {
 506                 *mask_ptr = '\0';
 507                 mask_ptr++;
 508
 509                 /* the mask must be entered in hex base as it is going to be a
 510                  * bitmask and not a prefix length
 511                  */
 512                 if (kstrtou32(mask_ptr, 16, &mask) < 0)
 513                         return -EINVAL;
 514         }
 515
 516         /* the mark can be entered in any base */
 517         if (kstrtou32(buff, 0, &mark) < 0)
 518                 return -EINVAL;
 519
 520         bat_priv->isolation_mark_mask = mask;
 521         /* erase bits not covered by the mask */
 522         bat_priv->isolation_mark = mark & bat_priv->isolation_mark_mask;
 523
 524         batadv_info(net_dev,
 525                     "New skb mark for extended isolation: %#.8x/%#.8x\n",
 526                     bat_priv->isolation_mark, bat_priv->isolation_mark_mask);
 527
 528         return count;
 529 }
 530
 531 BATADV_ATTR_SIF_BOOL(aggregated_ogms, S_IRUGO | S_IWUSR, NULL);
 532 BATADV_ATTR_SIF_BOOL(bonding, S_IRUGO | S_IWUSR, NULL);
 533 #ifdef CONFIG_BATMAN_ADV_BLA
 534 BATADV_ATTR_SIF_BOOL(bridge_loop_avoidance, S_IRUGO | S_IWUSR, NULL);
 535 #endif
 536 #ifdef CONFIG_BATMAN_ADV_DAT
 537 BATADV_ATTR_SIF_BOOL(distributed_arp_table, S_IRUGO | S_IWUSR,
 538                      batadv_dat_status_update);
 539 #endif
 540 BATADV_ATTR_SIF_BOOL(fragmentation, S_IRUGO | S_IWUSR, batadv_update_min_mtu);
 541 static BATADV_ATTR(routing_algo, S_IRUGO, batadv_show_bat_algo, NULL);
 542 static BATADV_ATTR(gw_mode, S_IRUGO | S_IWUSR, batadv_show_gw_mode,
 543                    batadv_store_gw_mode);
 544 BATADV_ATTR_SIF_UINT(orig_interval, S_IRUGO | S_IWUSR, 2 * BATADV_JITTER,
 545                      INT_MAX, NULL);
 546 BATADV_ATTR_SIF_UINT(hop_penalty, S_IRUGO | S_IWUSR, 0, BATADV_TQ_MAX_VALUE,
 547                      NULL);
 548 BATADV_ATTR_SIF_UINT(gw_sel_class, S_IRUGO | S_IWUSR, 1, BATADV_TQ_MAX_VALUE,
 549                      batadv_post_gw_reselect);
 550 static BATADV_ATTR(gw_bandwidth, S_IRUGO | S_IWUSR, batadv_show_gw_bwidth,
 551                    batadv_store_gw_bwidth);
 552 #ifdef CONFIG_BATMAN_ADV_MCAST
 553 BATADV_ATTR_SIF_BOOL(multicast_mode, S_IRUGO | S_IWUSR, NULL);
 554 #endif
 555 #ifdef CONFIG_BATMAN_ADV_DEBUG
 556 BATADV_ATTR_SIF_UINT(log_level, S_IRUGO | S_IWUSR, 0, BATADV_DBG_ALL, NULL);
 557 #endif
 558 #ifdef CONFIG_BATMAN_ADV_NC
 559 BATADV_ATTR_SIF_BOOL(network_coding, S_IRUGO | S_IWUSR,
 560                      batadv_nc_status_update);
 561 #endif
 562 static BATADV_ATTR(isolation_mark, S_IRUGO | S_IWUSR,
 563                    batadv_show_isolation_mark, batadv_store_isolation_mark);
 564
 565 static struct batadv_attribute *batadv_mesh_attrs[] = {
 566         &batadv_attr_aggregated_ogms,
 567         &batadv_attr_bonding,
 568 #ifdef CONFIG_BATMAN_ADV_BLA
 569         &batadv_attr_bridge_loop_avoidance,
 570 #endif
 571 #ifdef CONFIG_BATMAN_ADV_DAT
 572         &batadv_attr_distributed_arp_table,
 573 #endif
 574 #ifdef CONFIG_BATMAN_ADV_MCAST
 575         &batadv_attr_multicast_mode,
 576 #endif
 577         &batadv_attr_fragmentation,
 578         &batadv_attr_routing_algo,
 579         &batadv_attr_gw_mode,
 580         &batadv_attr_orig_interval,
 581         &batadv_attr_hop_penalty,
 582         &batadv_attr_gw_sel_class,
 583         &batadv_attr_gw_bandwidth,
 584 #ifdef CONFIG_BATMAN_ADV_DEBUG
 585         &batadv_attr_log_level,
 586 #endif
 587 #ifdef CONFIG_BATMAN_ADV_NC
 588         &batadv_attr_network_coding,
 589 #endif
 590         &batadv_attr_isolation_mark,
 591         NULL,
 592 };
 593
 594 BATADV_ATTR_VLAN_BOOL(ap_isolation, S_IRUGO | S_IWUSR, NULL);
 595
 596 /**
 597  * batadv_vlan_attrs - array of vlan specific sysfs attributes
 598  */
 599 static struct batadv_attribute *batadv_vlan_attrs[] = {
 600         &batadv_attr_vlan_ap_isolation,
 601         NULL,
 602 };
 603
 604 int batadv_sysfs_add_meshif(struct net_device *dev)
 605 {
 606         struct kobject *batif_kobject = &dev->dev.kobj;
 607         struct batadv_priv *bat_priv = netdev_priv(dev);
 608         struct batadv_attribute **bat_attr;
 609         int err;
 610
 611         bat_priv->mesh_obj = kobject_create_and_add(BATADV_SYSFS_IF_MESH_SUBDIR,
 612                                                     batif_kobject);
 613         if (!bat_priv->mesh_obj) {
 614                 batadv_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
 615                            BATADV_SYSFS_IF_MESH_SUBDIR);
 616                 goto out;
 617         }
 618
 619         for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr) {
 620                 err = sysfs_create_file(bat_priv->mesh_obj,
 621                                         &((*bat_attr)->attr));
 622                 if (err) {
 623                         batadv_err(dev, "Can't add sysfs file: %s/%s/%s\n",
 624                                    dev->name, BATADV_SYSFS_IF_MESH_SUBDIR,
 625                                    ((*bat_attr)->attr).name);
 626                         goto rem_attr;
 627                 }
 628         }
 629
 630         return 0;
 631
 632 rem_attr:
 633         for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr)
 634                 sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
 635
 636         kobject_put(bat_priv->mesh_obj);
 637         bat_priv->mesh_obj = NULL;
 638 out:
 639         return -ENOMEM;
 640 }
 641
 642 void batadv_sysfs_del_meshif(struct net_device *dev)
 643 {
 644         struct batadv_priv *bat_priv = netdev_priv(dev);
 645         struct batadv_attribute **bat_attr;
 646
 647         for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr)
 648                 sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
 649
 650         kobject_put(bat_priv->mesh_obj);
 651         bat_priv->mesh_obj = NULL;
 652 }
 653
 654 /**
 655  * batadv_sysfs_add_vlan - add all the needed sysfs objects for the new vlan
 656  * @dev: netdev of the mesh interface
 657  * @vlan: private data of the newly added VLAN interface
 658  *
 659  * Returns 0 on success and -ENOMEM if any of the structure allocations fails.
 660  */
 661 int batadv_sysfs_add_vlan(struct net_device *dev,
 662                           struct batadv_softif_vlan *vlan)
 663 {
 664         char vlan_subdir[sizeof(BATADV_SYSFS_VLAN_SUBDIR_PREFIX) + 5];
 665         struct batadv_priv *bat_priv = netdev_priv(dev);
 666         struct batadv_attribute **bat_attr;
 667         int err;
 668
 669         if (vlan->vid & BATADV_VLAN_HAS_TAG) {
 670                 sprintf(vlan_subdir, BATADV_SYSFS_VLAN_SUBDIR_PREFIX "%hu",
 671                         vlan->vid & VLAN_VID_MASK);
 672
 673                 vlan->kobj = kobject_create_and_add(vlan_subdir,
 674                                                     bat_priv->mesh_obj);
 675                 if (!vlan->kobj) {
 676                         batadv_err(dev, "Can't add sysfs directory: %s/%s\n",
 677                                    dev->name, vlan_subdir);
 678                         goto out;
 679                 }
 680         } else {
 681                 /* the untagged LAN uses the root folder to store its "VLAN
 682                  * specific attributes"
 683                  */
 684                 vlan->kobj = bat_priv->mesh_obj;
 685                 kobject_get(bat_priv->mesh_obj);
 686         }
 687
 688         for (bat_attr = batadv_vlan_attrs; *bat_attr; ++bat_attr) {
 689                 err = sysfs_create_file(vlan->kobj,
 690                                         &((*bat_attr)->attr));
 691                 if (err) {
 692                         batadv_err(dev, "Can't add sysfs file: %s/%s/%s\n",
 693                                    dev->name, vlan_subdir,
 694                                    ((*bat_attr)->attr).name);
 695                         goto rem_attr;
 696                 }
 697         }
 698
 699         return 0;
 700
 701 rem_attr:
 702         for (bat_attr = batadv_vlan_attrs; *bat_attr; ++bat_attr)
 703                 sysfs_remove_file(vlan->kobj, &((*bat_attr)->attr));
 704
 705         kobject_put(vlan->kobj);
 706         vlan->kobj = NULL;
 707 out:
 708         return -ENOMEM;
 709 }
 710
 711 /**
 712  * batadv_sysfs_del_vlan - remove all the sysfs objects for a given VLAN
 713  * @bat_priv: the bat priv with all the soft interface information
 714  * @vlan: the private data of the VLAN to destroy
 715  */
 716 void batadv_sysfs_del_vlan(struct batadv_priv *bat_priv,
 717                            struct batadv_softif_vlan *vlan)
 718 {
 719         struct batadv_attribute **bat_attr;
 720
 721         for (bat_attr = batadv_vlan_attrs; *bat_attr; ++bat_attr)
 722                 sysfs_remove_file(vlan->kobj, &((*bat_attr)->attr));
 723
 724         kobject_put(vlan->kobj);
 725         vlan->kobj = NULL;
 726 }
 727
 728 static ssize_t batadv_show_mesh_iface(struct kobject *kobj,
 729                                       struct attribute *attr, char *buff)
 730 {
 731         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 732         struct batadv_hard_iface *hard_iface;
 733         ssize_t length;
 734         const char *ifname;
 735
 736         hard_iface = batadv_hardif_get_by_netdev(net_dev);
 737         if (!hard_iface)
 738                 return 0;
 739
 740         if (hard_iface->if_status == BATADV_IF_NOT_IN_USE)
 741                 ifname =  "none";
 742         else
 743                 ifname = hard_iface->soft_iface->name;
 744
 745         length = sprintf(buff, "%s\n", ifname);
 746
 747         batadv_hardif_free_ref(hard_iface);
 748
 749         return length;
 750 }
 751
 752 static ssize_t batadv_store_mesh_iface(struct kobject *kobj,
 753                                        struct attribute *attr, char *buff,
 754                                        size_t count)
 755 {
 756         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 757         struct batadv_hard_iface *hard_iface;
 758         int status_tmp = -1;
 759         int ret = count;
 760
 761         hard_iface = batadv_hardif_get_by_netdev(net_dev);
 762         if (!hard_iface)
 763                 return count;
 764
 765         if (buff[count - 1] == '\n')
 766                 buff[count - 1] = '\0';
 767
 768         if (strlen(buff) >= IFNAMSIZ) {
 769                 pr_err("Invalid parameter for 'mesh_iface' setting received: interface name too long '%s'\n",
 770                        buff);
 771                 batadv_hardif_free_ref(hard_iface);
 772                 return -EINVAL;
 773         }
 774
 775         if (strncmp(buff, "none", 4) == 0)
 776                 status_tmp = BATADV_IF_NOT_IN_USE;
 777         else
 778                 status_tmp = BATADV_IF_I_WANT_YOU;
 779
 780         if (hard_iface->if_status == status_tmp)
 781                 goto out;
 782
 783         if ((hard_iface->soft_iface) &&
 784             (strncmp(hard_iface->soft_iface->name, buff, IFNAMSIZ) == 0))
 785                 goto out;
 786
 787         rtnl_lock();
 788
 789         if (status_tmp == BATADV_IF_NOT_IN_USE) {
 790                 batadv_hardif_disable_interface(hard_iface,
 791                                                 BATADV_IF_CLEANUP_AUTO);
 792                 goto unlock;
 793         }
 794
 795         /* if the interface already is in use */
 796         if (hard_iface->if_status != BATADV_IF_NOT_IN_USE)
 797                 batadv_hardif_disable_interface(hard_iface,
 798                                                 BATADV_IF_CLEANUP_AUTO);
 799
 800         ret = batadv_hardif_enable_interface(hard_iface, buff);
 801
 802 unlock:
 803         rtnl_unlock();
 804 out:
 805         batadv_hardif_free_ref(hard_iface);
 806         return ret;
 807 }
 808
 809 static ssize_t batadv_show_iface_status(struct kobject *kobj,
 810                                         struct attribute *attr, char *buff)
 811 {
 812         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 813         struct batadv_hard_iface *hard_iface;
 814         ssize_t length;
 815
 816         hard_iface = batadv_hardif_get_by_netdev(net_dev);
 817         if (!hard_iface)
 818                 return 0;
 819
 820         switch (hard_iface->if_status) {
 821         case BATADV_IF_TO_BE_REMOVED:
 822                 length = sprintf(buff, "disabling\n");
 823                 break;
 824         case BATADV_IF_INACTIVE:
 825                 length = sprintf(buff, "inactive\n");
 826                 break;
 827         case BATADV_IF_ACTIVE:
 828                 length = sprintf(buff, "active\n");
 829                 break;
 830         case BATADV_IF_TO_BE_ACTIVATED:
 831                 length = sprintf(buff, "enabling\n");
 832                 break;
 833         case BATADV_IF_NOT_IN_USE:
 834         default:
 835                 length = sprintf(buff, "not in use\n");
 836                 break;
 837         }
 838
 839         batadv_hardif_free_ref(hard_iface);
 840
 841         return length;
 842 }
 843
 844 static BATADV_ATTR(mesh_iface, S_IRUGO | S_IWUSR, batadv_show_mesh_iface,
 845                    batadv_store_mesh_iface);
 846 static BATADV_ATTR(iface_status, S_IRUGO, batadv_show_iface_status, NULL);
 847
 848 static struct batadv_attribute *batadv_batman_attrs[] = {
 849         &batadv_attr_mesh_iface,
 850         &batadv_attr_iface_status,
 851         NULL,
 852 };
 853
 854 int batadv_sysfs_add_hardif(struct kobject **hardif_obj, struct net_device *dev)
 855 {
 856         struct kobject *hardif_kobject = &dev->dev.kobj;
 857         struct batadv_attribute **bat_attr;
 858         int err;
 859
 860         *hardif_obj = kobject_create_and_add(BATADV_SYSFS_IF_BAT_SUBDIR,
 861                                              hardif_kobject);
 862
 863         if (!*hardif_obj) {
 864                 batadv_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
 865                            BATADV_SYSFS_IF_BAT_SUBDIR);
 866                 goto out;
 867         }
 868
 869         for (bat_attr = batadv_batman_attrs; *bat_attr; ++bat_attr) {
 870                 err = sysfs_create_file(*hardif_obj, &((*bat_attr)->attr));
 871                 if (err) {
 872                         batadv_err(dev, "Can't add sysfs file: %s/%s/%s\n",
 873                                    dev->name, BATADV_SYSFS_IF_BAT_SUBDIR,
 874                                    ((*bat_attr)->attr).name);
 875                         goto rem_attr;
 876                 }
 877         }
 878
 879         return 0;
 880
 881 rem_attr:
 882         for (bat_attr = batadv_batman_attrs; *bat_attr; ++bat_attr)
 883                 sysfs_remove_file(*hardif_obj, &((*bat_attr)->attr));
 884 out:
 885         return -ENOMEM;
 886 }
 887
 888 void batadv_sysfs_del_hardif(struct kobject **hardif_obj)
 889 {
 890         kobject_put(*hardif_obj);
 891         *hardif_obj = NULL;
 892 }
 893
 894 int batadv_throw_uevent(struct batadv_priv *bat_priv, enum batadv_uev_type type,
 895                         enum batadv_uev_action action, const char *data)
 896 {
 897         int ret = -ENOMEM;
 898         struct kobject *bat_kobj;
 899         char *uevent_env[4] = { NULL, NULL, NULL, NULL };
 900
 901         bat_kobj = &bat_priv->soft_iface->dev.kobj;
 902
 903         uevent_env[0] = kasprintf(GFP_ATOMIC,
 904                                   "%s%s", BATADV_UEV_TYPE_VAR,
 905                                   batadv_uev_type_str[type]);
 906         if (!uevent_env[0])
 907                 goto out;
 908
 909         uevent_env[1] = kasprintf(GFP_ATOMIC,
 910                                   "%s%s", BATADV_UEV_ACTION_VAR,
 911                                   batadv_uev_action_str[action]);
 912         if (!uevent_env[1])
 913                 goto out;
 914
 915         /* If the event is DEL, ignore the data field */
 916         if (action != BATADV_UEV_DEL) {
 917                 uevent_env[2] = kasprintf(GFP_ATOMIC,
 918                                           "%s%s", BATADV_UEV_DATA_VAR, data);
 919                 if (!uevent_env[2])
 920                         goto out;
 921         }
 922
 923         ret = kobject_uevent_env(bat_kobj, KOBJ_CHANGE, uevent_env);
 924 out:
 925         kfree(uevent_env[0]);
 926         kfree(uevent_env[1]);
 927         kfree(uevent_env[2]);
 928
 929         if (ret)
 930                 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
 931                            "Impossible to send uevent for (%s,%s,%s) event (err: %d)\n",
 932                            batadv_uev_type_str[type],
 933                            batadv_uev_action_str[action],
 934                            (action == BATADV_UEV_DEL ? "NULL" : data), ret);
 935         return ret;
 936 }