net/batman-adv/sysfs.c

   1 /* Copyright (C) 2010-2016  B.A.T.M.A.N. contributors:
   2  *
   3  * Marek Lindner
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of version 2 of the GNU General Public
   7  * License as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  12  * General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include "sysfs.h"
  19 #include "main.h"
  20
  21 #include <linux/atomic.h>
  22 #include <linux/compiler.h>
  23 #include <linux/device.h>
  24 #include <linux/errno.h>
  25 #include <linux/fs.h>
  26 #include <linux/if.h>
  27 #include <linux/if_vlan.h>
  28 #include <linux/kernel.h>
  29 #include <linux/netdevice.h>
  30 #include <linux/printk.h>
  31 #include <linux/rculist.h>
  32 #include <linux/rcupdate.h>
  33 #include <linux/rtnetlink.h>
  34 #include <linux/slab.h>
  35 #include <linux/stat.h>
  36 #include <linux/stddef.h>
  37 #include <linux/string.h>
  38 #include <linux/stringify.h>
  39
  40 #include "distributed-arp-table.h"
  41 #include "gateway_client.h"
  42 #include "gateway_common.h"
  43 #include "bridge_loop_avoidance.h"
  44 #include "hard-interface.h"
  45 #include "network-coding.h"
  46 #include "packet.h"
  47 #include "soft-interface.h"
  48
  49 static struct net_device *batadv_kobj_to_netdev(struct kobject *obj)
  50 {
  51         struct device *dev = container_of(obj->parent, struct device, kobj);
  52
  53         return to_net_dev(dev);
  54 }
  55
  56 static struct batadv_priv *batadv_kobj_to_batpriv(struct kobject *obj)
  57 {
  58         struct net_device *net_dev = batadv_kobj_to_netdev(obj);
  59
  60         return netdev_priv(net_dev);
  61 }
  62
  63 /**
  64  * batadv_vlan_kobj_to_batpriv - convert a vlan kobj in the associated batpriv
  65  * @obj: kobject to covert
  66  *
  67  * Return: the associated batadv_priv struct.
  68  */
  69 static struct batadv_priv *batadv_vlan_kobj_to_batpriv(struct kobject *obj)
  70 {
  71         /* VLAN specific attributes are located in the root sysfs folder if they
  72          * refer to the untagged VLAN..
  73          */
  74         if (!strcmp(BATADV_SYSFS_IF_MESH_SUBDIR, obj->name))
  75                 return batadv_kobj_to_batpriv(obj);
  76
  77         /* ..while the attributes for the tagged vlans are located in
  78          * the in the corresponding "vlan%VID" subfolder
  79          */
  80         return batadv_kobj_to_batpriv(obj->parent);
  81 }
  82
  83 /**
  84  * batadv_kobj_to_vlan - convert a kobj in the associated softif_vlan struct
  85  * @bat_priv: the bat priv with all the soft interface information
  86  * @obj: kobject to covert
  87  *
  88  * Return: the associated softif_vlan struct if found, NULL otherwise.
  89  */
  90 static struct batadv_softif_vlan *
  91 batadv_kobj_to_vlan(struct batadv_priv *bat_priv, struct kobject *obj)
  92 {
  93         struct batadv_softif_vlan *vlan_tmp, *vlan = NULL;
  94
  95         rcu_read_lock();
  96         hlist_for_each_entry_rcu(vlan_tmp, &bat_priv->softif_vlan_list, list) {
  97                 if (vlan_tmp->kobj != obj)
  98                         continue;
  99
 100                 if (!atomic_inc_not_zero(&vlan_tmp->refcount))
 101                         continue;
 102
 103                 vlan = vlan_tmp;
 104                 break;
 105         }
 106         rcu_read_unlock();
 107
 108         return vlan;
 109 }
 110
 111 #define BATADV_UEV_TYPE_VAR     "BATTYPE="
 112 #define BATADV_UEV_ACTION_VAR   "BATACTION="
 113 #define BATADV_UEV_DATA_VAR     "BATDATA="
 114
 115 static char *batadv_uev_action_str[] = {
 116         "add",
 117         "del",
 118         "change"
 119 };
 120
 121 static char *batadv_uev_type_str[] = {
 122         "gw"
 123 };
 124
 125 /* Use this, if you have customized show and store functions for vlan attrs */
 126 #define BATADV_ATTR_VLAN(_name, _mode, _show, _store)   \
 127 struct batadv_attribute batadv_attr_vlan_##_name = {    \
 128         .attr = {.name = __stringify(_name),            \
 129                  .mode = _mode },                       \
 130         .show   = _show,                                \
 131         .store  = _store,                               \
 132 }
 133
 134 /* Use this, if you have customized show and store functions */
 135 #define BATADV_ATTR(_name, _mode, _show, _store)        \
 136 struct batadv_attribute batadv_attr_##_name = {         \
 137         .attr = {.name = __stringify(_name),            \
 138                  .mode = _mode },                       \
 139         .show   = _show,                                \
 140         .store  = _store,                               \
 141 }
 142
 143 #define BATADV_ATTR_SIF_STORE_BOOL(_name, _post_func)                   \
 144 ssize_t batadv_store_##_name(struct kobject *kobj,                      \
 145                              struct attribute *attr, char *buff,        \
 146                              size_t count)                              \
 147 {                                                                       \
 148         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);       \
 149         struct batadv_priv *bat_priv = netdev_priv(net_dev);            \
 150                                                                         \
 151         return __batadv_store_bool_attr(buff, count, _post_func, attr,  \
 152                                         &bat_priv->_name, net_dev);     \
 153 }
 154
 155 #define BATADV_ATTR_SIF_SHOW_BOOL(_name)                                \
 156 ssize_t batadv_show_##_name(struct kobject *kobj,                       \
 157                             struct attribute *attr, char *buff)         \
 158 {                                                                       \
 159         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);    \
 160                                                                         \
 161         return sprintf(buff, "%s\n",                                    \
 162                        atomic_read(&bat_priv->_name) == 0 ?             \
 163                        "disabled" : "enabled");                         \
 164 }                                                                       \
 165
 166 /* Use this, if you are going to turn a [name] in the soft-interface
 167  * (bat_priv) on or off
 168  */
 169 #define BATADV_ATTR_SIF_BOOL(_name, _mode, _post_func)                  \
 170         static BATADV_ATTR_SIF_STORE_BOOL(_name, _post_func)            \
 171         static BATADV_ATTR_SIF_SHOW_BOOL(_name)                         \
 172         static BATADV_ATTR(_name, _mode, batadv_show_##_name,           \
 173                            batadv_store_##_name)
 174
 175 #define BATADV_ATTR_SIF_STORE_UINT(_name, _var, _min, _max, _post_func) \
 176 ssize_t batadv_store_##_name(struct kobject *kobj,                      \
 177                              struct attribute *attr, char *buff,        \
 178                              size_t count)                              \
 179 {                                                                       \
 180         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);       \
 181         struct batadv_priv *bat_priv = netdev_priv(net_dev);            \
 182                                                                         \
 183         return __batadv_store_uint_attr(buff, count, _min, _max,        \
 184                                         _post_func, attr,               \
 185                                         &bat_priv->_var, net_dev);      \
 186 }
 187
 188 #define BATADV_ATTR_SIF_SHOW_UINT(_name, _var)                          \
 189 ssize_t batadv_show_##_name(struct kobject *kobj,                       \
 190                             struct attribute *attr, char *buff)         \
 191 {                                                                       \
 192         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);    \
 193                                                                         \
 194         return sprintf(buff, "%i\n", atomic_read(&bat_priv->_var));     \
 195 }                                                                       \
 196
 197 /* Use this, if you are going to set [name] in the soft-interface
 198  * (bat_priv) to an unsigned integer value
 199  */
 200 #define BATADV_ATTR_SIF_UINT(_name, _var, _mode, _min, _max, _post_func)\
 201         static BATADV_ATTR_SIF_STORE_UINT(_name, _var, _min, _max, _post_func)\
 202         static BATADV_ATTR_SIF_SHOW_UINT(_name, _var)                   \
 203         static BATADV_ATTR(_name, _mode, batadv_show_##_name,           \
 204                            batadv_store_##_name)
 205
 206 #define BATADV_ATTR_VLAN_STORE_BOOL(_name, _post_func)                  \
 207 ssize_t batadv_store_vlan_##_name(struct kobject *kobj,                 \
 208                                   struct attribute *attr, char *buff,   \
 209                                   size_t count)                         \
 210 {                                                                       \
 211         struct batadv_priv *bat_priv = batadv_vlan_kobj_to_batpriv(kobj);\
 212         struct batadv_softif_vlan *vlan = batadv_kobj_to_vlan(bat_priv, \
 213                                                               kobj);    \
 214         size_t res = __batadv_store_bool_attr(buff, count, _post_func,  \
 215                                               attr, &vlan->_name,       \
 216                                               bat_priv->soft_iface);    \
 217                                                                         \
 218         batadv_softif_vlan_free_ref(vlan);                              \
 219         return res;                                                     \
 220 }
 221
 222 #define BATADV_ATTR_VLAN_SHOW_BOOL(_name)                               \
 223 ssize_t batadv_show_vlan_##_name(struct kobject *kobj,                  \
 224                                  struct attribute *attr, char *buff)    \
 225 {                                                                       \
 226         struct batadv_priv *bat_priv = batadv_vlan_kobj_to_batpriv(kobj);\
 227         struct batadv_softif_vlan *vlan = batadv_kobj_to_vlan(bat_priv, \
 228                                                               kobj);    \
 229         size_t res = sprintf(buff, "%s\n",                              \
 230                              atomic_read(&vlan->_name) == 0 ?           \
 231                              "disabled" : "enabled");                   \
 232                                                                         \
 233         batadv_softif_vlan_free_ref(vlan);                              \
 234         return res;                                                     \
 235 }
 236
 237 /* Use this, if you are going to turn a [name] in the vlan struct on or off */
 238 #define BATADV_ATTR_VLAN_BOOL(_name, _mode, _post_func)                 \
 239         static BATADV_ATTR_VLAN_STORE_BOOL(_name, _post_func)           \
 240         static BATADV_ATTR_VLAN_SHOW_BOOL(_name)                        \
 241         static BATADV_ATTR_VLAN(_name, _mode, batadv_show_vlan_##_name, \
 242                                 batadv_store_vlan_##_name)
 243
 244 static int batadv_store_bool_attr(char *buff, size_t count,
 245                                   struct net_device *net_dev,
 246                                   const char *attr_name, atomic_t *attr,
 247                                   bool *changed)
 248 {
 249         int enabled = -1;
 250
 251         *changed = false;
 252
 253         if (buff[count - 1] == '\n')
 254                 buff[count - 1] = '\0';
 255
 256         if ((strncmp(buff, "1", 2) == 0) ||
 257             (strncmp(buff, "enable", 7) == 0) ||
 258             (strncmp(buff, "enabled", 8) == 0))
 259                 enabled = 1;
 260
 261         if ((strncmp(buff, "0", 2) == 0) ||
 262             (strncmp(buff, "disable", 8) == 0) ||
 263             (strncmp(buff, "disabled", 9) == 0))
 264                 enabled = 0;
 265
 266         if (enabled < 0) {
 267                 batadv_info(net_dev, "%s: Invalid parameter received: %s\n",
 268                             attr_name, buff);
 269                 return -EINVAL;
 270         }
 271
 272         if (atomic_read(attr) == enabled)
 273                 return count;
 274
 275         batadv_info(net_dev, "%s: Changing from: %s to: %s\n", attr_name,
 276                     atomic_read(attr) == 1 ? "enabled" : "disabled",
 277                     enabled == 1 ? "enabled" : "disabled");
 278
 279         *changed = true;
 280
 281         atomic_set(attr, (unsigned int)enabled);
 282         return count;
 283 }
 284
 285 static inline ssize_t
 286 __batadv_store_bool_attr(char *buff, size_t count,
 287                          void (*post_func)(struct net_device *),
 288                          struct attribute *attr,
 289                          atomic_t *attr_store, struct net_device *net_dev)
 290 {
 291         bool changed;
 292         int ret;
 293
 294         ret = batadv_store_bool_attr(buff, count, net_dev, attr->name,
 295                                      attr_store, &changed);
 296         if (post_func && changed)
 297                 post_func(net_dev);
 298
 299         return ret;
 300 }
 301
 302 static int batadv_store_uint_attr(const char *buff, size_t count,
 303                                   struct net_device *net_dev,
 304                                   const char *attr_name,
 305                                   unsigned int min, unsigned int max,
 306                                   atomic_t *attr)
 307 {
 308         unsigned long uint_val;
 309         int ret;
 310
 311         ret = kstrtoul(buff, 10, &uint_val);
 312         if (ret) {
 313                 batadv_info(net_dev, "%s: Invalid parameter received: %s\n",
 314                             attr_name, buff);
 315                 return -EINVAL;
 316         }
 317
 318         if (uint_val < min) {
 319                 batadv_info(net_dev, "%s: Value is too small: %lu min: %u\n",
 320                             attr_name, uint_val, min);
 321                 return -EINVAL;
 322         }
 323
 324         if (uint_val > max) {
 325                 batadv_info(net_dev, "%s: Value is too big: %lu max: %u\n",
 326                             attr_name, uint_val, max);
 327                 return -EINVAL;
 328         }
 329
 330         if (atomic_read(attr) == uint_val)
 331                 return count;
 332
 333         batadv_info(net_dev, "%s: Changing from: %i to: %lu\n",
 334                     attr_name, atomic_read(attr), uint_val);
 335
 336         atomic_set(attr, uint_val);
 337         return count;
 338 }
 339
 340 static inline ssize_t
 341 __batadv_store_uint_attr(const char *buff, size_t count,
 342                          int min, int max,
 343                          void (*post_func)(struct net_device *),
 344                          const struct attribute *attr,
 345                          atomic_t *attr_store, struct net_device *net_dev)
 346 {
 347         int ret;
 348
 349         ret = batadv_store_uint_attr(buff, count, net_dev, attr->name, min, max,
 350                                      attr_store);
 351         if (post_func && ret)
 352                 post_func(net_dev);
 353
 354         return ret;
 355 }
 356
 357 static ssize_t batadv_show_bat_algo(struct kobject *kobj,
 358                                     struct attribute *attr, char *buff)
 359 {
 360         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 361
 362         return sprintf(buff, "%s\n", bat_priv->bat_algo_ops->name);
 363 }
 364
 365 static void batadv_post_gw_reselect(struct net_device *net_dev)
 366 {
 367         struct batadv_priv *bat_priv = netdev_priv(net_dev);
 368
 369         batadv_gw_reselect(bat_priv);
 370 }
 371
 372 static ssize_t batadv_show_gw_mode(struct kobject *kobj, struct attribute *attr,
 373                                    char *buff)
 374 {
 375         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 376         int bytes_written;
 377
 378         switch (atomic_read(&bat_priv->gw_mode)) {
 379         case BATADV_GW_MODE_CLIENT:
 380                 bytes_written = sprintf(buff, "%s\n",
 381                                         BATADV_GW_MODE_CLIENT_NAME);
 382                 break;
 383         case BATADV_GW_MODE_SERVER:
 384                 bytes_written = sprintf(buff, "%s\n",
 385                                         BATADV_GW_MODE_SERVER_NAME);
 386                 break;
 387         default:
 388                 bytes_written = sprintf(buff, "%s\n",
 389                                         BATADV_GW_MODE_OFF_NAME);
 390                 break;
 391         }
 392
 393         return bytes_written;
 394 }
 395
 396 static ssize_t batadv_store_gw_mode(struct kobject *kobj,
 397                                     struct attribute *attr, char *buff,
 398                                     size_t count)
 399 {
 400         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 401         struct batadv_priv *bat_priv = netdev_priv(net_dev);
 402         char *curr_gw_mode_str;
 403         int gw_mode_tmp = -1;
 404
 405         if (buff[count - 1] == '\n')
 406                 buff[count - 1] = '\0';
 407
 408         if (strncmp(buff, BATADV_GW_MODE_OFF_NAME,
 409                     strlen(BATADV_GW_MODE_OFF_NAME)) == 0)
 410                 gw_mode_tmp = BATADV_GW_MODE_OFF;
 411
 412         if (strncmp(buff, BATADV_GW_MODE_CLIENT_NAME,
 413                     strlen(BATADV_GW_MODE_CLIENT_NAME)) == 0)
 414                 gw_mode_tmp = BATADV_GW_MODE_CLIENT;
 415
 416         if (strncmp(buff, BATADV_GW_MODE_SERVER_NAME,
 417                     strlen(BATADV_GW_MODE_SERVER_NAME)) == 0)
 418                 gw_mode_tmp = BATADV_GW_MODE_SERVER;
 419
 420         if (gw_mode_tmp < 0) {
 421                 batadv_info(net_dev,
 422                             "Invalid parameter for 'gw mode' setting received: %s\n",
 423                             buff);
 424                 return -EINVAL;
 425         }
 426
 427         if (atomic_read(&bat_priv->gw_mode) == gw_mode_tmp)
 428                 return count;
 429
 430         switch (atomic_read(&bat_priv->gw_mode)) {
 431         case BATADV_GW_MODE_CLIENT:
 432                 curr_gw_mode_str = BATADV_GW_MODE_CLIENT_NAME;
 433                 break;
 434         case BATADV_GW_MODE_SERVER:
 435                 curr_gw_mode_str = BATADV_GW_MODE_SERVER_NAME;
 436                 break;
 437         default:
 438                 curr_gw_mode_str = BATADV_GW_MODE_OFF_NAME;
 439                 break;
 440         }
 441
 442         batadv_info(net_dev, "Changing gw mode from: %s to: %s\n",
 443                     curr_gw_mode_str, buff);
 444
 445         /* Invoking batadv_gw_reselect() is not enough to really de-select the
 446          * current GW. It will only instruct the gateway client code to perform
 447          * a re-election the next time that this is needed.
 448          *
 449          * When gw client mode is being switched off the current GW must be
 450          * de-selected explicitly otherwise no GW_ADD uevent is thrown on
 451          * client mode re-activation. This is operation is performed in
 452          * batadv_gw_check_client_stop().
 453          */
 454         batadv_gw_reselect(bat_priv);
 455         /* always call batadv_gw_check_client_stop() before changing the gateway
 456          * state
 457          */
 458         batadv_gw_check_client_stop(bat_priv);
 459         atomic_set(&bat_priv->gw_mode, (unsigned int)gw_mode_tmp);
 460         batadv_gw_tvlv_container_update(bat_priv);
 461         return count;
 462 }
 463
 464 static ssize_t batadv_show_gw_bwidth(struct kobject *kobj,
 465                                      struct attribute *attr, char *buff)
 466 {
 467         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 468         u32 down, up;
 469
 470         down = atomic_read(&bat_priv->gw.bandwidth_down);
 471         up = atomic_read(&bat_priv->gw.bandwidth_up);
 472
 473         return sprintf(buff, "%u.%u/%u.%u MBit\n", down / 10,
 474                        down % 10, up / 10, up % 10);
 475 }
 476
 477 static ssize_t batadv_store_gw_bwidth(struct kobject *kobj,
 478                                       struct attribute *attr, char *buff,
 479                                       size_t count)
 480 {
 481         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 482
 483         if (buff[count - 1] == '\n')
 484                 buff[count - 1] = '\0';
 485
 486         return batadv_gw_bandwidth_set(net_dev, buff, count);
 487 }
 488
 489 /**
 490  * batadv_show_isolation_mark - print the current isolation mark/mask
 491  * @kobj: kobject representing the private mesh sysfs directory
 492  * @attr: the batman-adv attribute the user is interacting with
 493  * @buff: the buffer that will contain the data to send back to the user
 494  *
 495  * Return: the number of bytes written into 'buff' on success or a negative
 496  * error code in case of failure
 497  */
 498 static ssize_t batadv_show_isolation_mark(struct kobject *kobj,
 499                                           struct attribute *attr, char *buff)
 500 {
 501         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 502
 503         return sprintf(buff, "%#.8x/%#.8x\n", bat_priv->isolation_mark,
 504                        bat_priv->isolation_mark_mask);
 505 }
 506
 507 /**
 508  * batadv_store_isolation_mark - parse and store the isolation mark/mask entered
 509  *  by the user
 510  * @kobj: kobject representing the private mesh sysfs directory
 511  * @attr: the batman-adv attribute the user is interacting with
 512  * @buff: the buffer containing the user data
 513  * @count: number of bytes in the buffer
 514  *
 515  * Return: 'count' on success or a negative error code in case of failure
 516  */
 517 static ssize_t batadv_store_isolation_mark(struct kobject *kobj,
 518                                            struct attribute *attr, char *buff,
 519                                            size_t count)
 520 {
 521         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 522         struct batadv_priv *bat_priv = netdev_priv(net_dev);
 523         u32 mark, mask;
 524         char *mask_ptr;
 525
 526         /* parse the mask if it has been specified, otherwise assume the mask is
 527          * the biggest possible
 528          */
 529         mask = 0xFFFFFFFF;
 530         mask_ptr = strchr(buff, '/');
 531         if (mask_ptr) {
 532                 *mask_ptr = '\0';
 533                 mask_ptr++;
 534
 535                 /* the mask must be entered in hex base as it is going to be a
 536                  * bitmask and not a prefix length
 537                  */
 538                 if (kstrtou32(mask_ptr, 16, &mask) < 0)
 539                         return -EINVAL;
 540         }
 541
 542         /* the mark can be entered in any base */
 543         if (kstrtou32(buff, 0, &mark) < 0)
 544                 return -EINVAL;
 545
 546         bat_priv->isolation_mark_mask = mask;
 547         /* erase bits not covered by the mask */
 548         bat_priv->isolation_mark = mark & bat_priv->isolation_mark_mask;
 549
 550         batadv_info(net_dev,
 551                     "New skb mark for extended isolation: %#.8x/%#.8x\n",
 552                     bat_priv->isolation_mark, bat_priv->isolation_mark_mask);
 553
 554         return count;
 555 }
 556
 557 BATADV_ATTR_SIF_BOOL(aggregated_ogms, S_IRUGO | S_IWUSR, NULL);
 558 BATADV_ATTR_SIF_BOOL(bonding, S_IRUGO | S_IWUSR, NULL);
 559 #ifdef CONFIG_BATMAN_ADV_BLA
 560 BATADV_ATTR_SIF_BOOL(bridge_loop_avoidance, S_IRUGO | S_IWUSR,
 561                      batadv_bla_status_update);
 562 #endif
 563 #ifdef CONFIG_BATMAN_ADV_DAT
 564 BATADV_ATTR_SIF_BOOL(distributed_arp_table, S_IRUGO | S_IWUSR,
 565                      batadv_dat_status_update);
 566 #endif
 567 BATADV_ATTR_SIF_BOOL(fragmentation, S_IRUGO | S_IWUSR, batadv_update_min_mtu);
 568 static BATADV_ATTR(routing_algo, S_IRUGO, batadv_show_bat_algo, NULL);
 569 static BATADV_ATTR(gw_mode, S_IRUGO | S_IWUSR, batadv_show_gw_mode,
 570                    batadv_store_gw_mode);
 571 BATADV_ATTR_SIF_UINT(orig_interval, orig_interval, S_IRUGO | S_IWUSR,
 572                      2 * BATADV_JITTER, INT_MAX, NULL);
 573 BATADV_ATTR_SIF_UINT(hop_penalty, hop_penalty, S_IRUGO | S_IWUSR, 0,
 574                      BATADV_TQ_MAX_VALUE, NULL);
 575 BATADV_ATTR_SIF_UINT(gw_sel_class, gw_sel_class, S_IRUGO | S_IWUSR, 1,
 576                      BATADV_TQ_MAX_VALUE, batadv_post_gw_reselect);
 577 static BATADV_ATTR(gw_bandwidth, S_IRUGO | S_IWUSR, batadv_show_gw_bwidth,
 578                    batadv_store_gw_bwidth);
 579 #ifdef CONFIG_BATMAN_ADV_MCAST
 580 BATADV_ATTR_SIF_BOOL(multicast_mode, S_IRUGO | S_IWUSR, NULL);
 581 #endif
 582 #ifdef CONFIG_BATMAN_ADV_DEBUG
 583 BATADV_ATTR_SIF_UINT(log_level, log_level, S_IRUGO | S_IWUSR, 0,
 584                      BATADV_DBG_ALL, NULL);
 585 #endif
 586 #ifdef CONFIG_BATMAN_ADV_NC
 587 BATADV_ATTR_SIF_BOOL(network_coding, S_IRUGO | S_IWUSR,
 588                      batadv_nc_status_update);
 589 #endif
 590 static BATADV_ATTR(isolation_mark, S_IRUGO | S_IWUSR,
 591                    batadv_show_isolation_mark, batadv_store_isolation_mark);
 592
 593 static struct batadv_attribute *batadv_mesh_attrs[] = {
 594         &batadv_attr_aggregated_ogms,
 595         &batadv_attr_bonding,
 596 #ifdef CONFIG_BATMAN_ADV_BLA
 597         &batadv_attr_bridge_loop_avoidance,
 598 #endif
 599 #ifdef CONFIG_BATMAN_ADV_DAT
 600         &batadv_attr_distributed_arp_table,
 601 #endif
 602 #ifdef CONFIG_BATMAN_ADV_MCAST
 603         &batadv_attr_multicast_mode,
 604 #endif
 605         &batadv_attr_fragmentation,
 606         &batadv_attr_routing_algo,
 607         &batadv_attr_gw_mode,
 608         &batadv_attr_orig_interval,
 609         &batadv_attr_hop_penalty,
 610         &batadv_attr_gw_sel_class,
 611         &batadv_attr_gw_bandwidth,
 612 #ifdef CONFIG_BATMAN_ADV_DEBUG
 613         &batadv_attr_log_level,
 614 #endif
 615 #ifdef CONFIG_BATMAN_ADV_NC
 616         &batadv_attr_network_coding,
 617 #endif
 618         &batadv_attr_isolation_mark,
 619         NULL,
 620 };
 621
 622 BATADV_ATTR_VLAN_BOOL(ap_isolation, S_IRUGO | S_IWUSR, NULL);
 623
 624 /* array of vlan specific sysfs attributes */
 625 static struct batadv_attribute *batadv_vlan_attrs[] = {
 626         &batadv_attr_vlan_ap_isolation,
 627         NULL,
 628 };
 629
 630 int batadv_sysfs_add_meshif(struct net_device *dev)
 631 {
 632         struct kobject *batif_kobject = &dev->dev.kobj;
 633         struct batadv_priv *bat_priv = netdev_priv(dev);
 634         struct batadv_attribute **bat_attr;
 635         int err;
 636
 637         bat_priv->mesh_obj = kobject_create_and_add(BATADV_SYSFS_IF_MESH_SUBDIR,
 638                                                     batif_kobject);
 639         if (!bat_priv->mesh_obj) {
 640                 batadv_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
 641                            BATADV_SYSFS_IF_MESH_SUBDIR);
 642                 goto out;
 643         }
 644
 645         for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr) {
 646                 err = sysfs_create_file(bat_priv->mesh_obj,
 647                                         &((*bat_attr)->attr));
 648                 if (err) {
 649                         batadv_err(dev, "Can't add sysfs file: %s/%s/%s\n",
 650                                    dev->name, BATADV_SYSFS_IF_MESH_SUBDIR,
 651                                    ((*bat_attr)->attr).name);
 652                         goto rem_attr;
 653                 }
 654         }
 655
 656         return 0;
 657
 658 rem_attr:
 659         for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr)
 660                 sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
 661
 662         kobject_put(bat_priv->mesh_obj);
 663         bat_priv->mesh_obj = NULL;
 664 out:
 665         return -ENOMEM;
 666 }
 667
 668 void batadv_sysfs_del_meshif(struct net_device *dev)
 669 {
 670         struct batadv_priv *bat_priv = netdev_priv(dev);
 671         struct batadv_attribute **bat_attr;
 672
 673         for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr)
 674                 sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
 675
 676         kobject_put(bat_priv->mesh_obj);
 677         bat_priv->mesh_obj = NULL;
 678 }
 679
 680 /**
 681  * batadv_sysfs_add_vlan - add all the needed sysfs objects for the new vlan
 682  * @dev: netdev of the mesh interface
 683  * @vlan: private data of the newly added VLAN interface
 684  *
 685  * Return: 0 on success and -ENOMEM if any of the structure allocations fails.
 686  */
 687 int batadv_sysfs_add_vlan(struct net_device *dev,
 688                           struct batadv_softif_vlan *vlan)
 689 {
 690         char vlan_subdir[sizeof(BATADV_SYSFS_VLAN_SUBDIR_PREFIX) + 5];
 691         struct batadv_priv *bat_priv = netdev_priv(dev);
 692         struct batadv_attribute **bat_attr;
 693         int err;
 694
 695         if (vlan->vid & BATADV_VLAN_HAS_TAG) {
 696                 sprintf(vlan_subdir, BATADV_SYSFS_VLAN_SUBDIR_PREFIX "%hu",
 697                         vlan->vid & VLAN_VID_MASK);
 698
 699                 vlan->kobj = kobject_create_and_add(vlan_subdir,
 700                                                     bat_priv->mesh_obj);
 701                 if (!vlan->kobj) {
 702                         batadv_err(dev, "Can't add sysfs directory: %s/%s\n",
 703                                    dev->name, vlan_subdir);
 704                         goto out;
 705                 }
 706         } else {
 707                 /* the untagged LAN uses the root folder to store its "VLAN
 708                  * specific attributes"
 709                  */
 710                 vlan->kobj = bat_priv->mesh_obj;
 711                 kobject_get(bat_priv->mesh_obj);
 712         }
 713
 714         for (bat_attr = batadv_vlan_attrs; *bat_attr; ++bat_attr) {
 715                 err = sysfs_create_file(vlan->kobj,
 716                                         &((*bat_attr)->attr));
 717                 if (err) {
 718                         batadv_err(dev, "Can't add sysfs file: %s/%s/%s\n",
 719                                    dev->name, vlan_subdir,
 720                                    ((*bat_attr)->attr).name);
 721                         goto rem_attr;
 722                 }
 723         }
 724
 725         return 0;
 726
 727 rem_attr:
 728         for (bat_attr = batadv_vlan_attrs; *bat_attr; ++bat_attr)
 729                 sysfs_remove_file(vlan->kobj, &((*bat_attr)->attr));
 730
 731         kobject_put(vlan->kobj);
 732         vlan->kobj = NULL;
 733 out:
 734         return -ENOMEM;
 735 }
 736
 737 /**
 738  * batadv_sysfs_del_vlan - remove all the sysfs objects for a given VLAN
 739  * @bat_priv: the bat priv with all the soft interface information
 740  * @vlan: the private data of the VLAN to destroy
 741  */
 742 void batadv_sysfs_del_vlan(struct batadv_priv *bat_priv,
 743                            struct batadv_softif_vlan *vlan)
 744 {
 745         struct batadv_attribute **bat_attr;
 746
 747         for (bat_attr = batadv_vlan_attrs; *bat_attr; ++bat_attr)
 748                 sysfs_remove_file(vlan->kobj, &((*bat_attr)->attr));
 749
 750         kobject_put(vlan->kobj);
 751         vlan->kobj = NULL;
 752 }
 753
 754 static ssize_t batadv_show_mesh_iface(struct kobject *kobj,
 755                                       struct attribute *attr, char *buff)
 756 {
 757         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 758         struct batadv_hard_iface *hard_iface;
 759         ssize_t length;
 760         const char *ifname;
 761
 762         hard_iface = batadv_hardif_get_by_netdev(net_dev);
 763         if (!hard_iface)
 764                 return 0;
 765
 766         if (hard_iface->if_status == BATADV_IF_NOT_IN_USE)
 767                 ifname =  "none";
 768         else
 769                 ifname = hard_iface->soft_iface->name;
 770
 771         length = sprintf(buff, "%s\n", ifname);
 772
 773         batadv_hardif_free_ref(hard_iface);
 774
 775         return length;
 776 }
 777
 778 static ssize_t batadv_store_mesh_iface(struct kobject *kobj,
 779                                        struct attribute *attr, char *buff,
 780                                        size_t count)
 781 {
 782         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 783         struct batadv_hard_iface *hard_iface;
 784         int status_tmp = -1;
 785         int ret = count;
 786
 787         hard_iface = batadv_hardif_get_by_netdev(net_dev);
 788         if (!hard_iface)
 789                 return count;
 790
 791         if (buff[count - 1] == '\n')
 792                 buff[count - 1] = '\0';
 793
 794         if (strlen(buff) >= IFNAMSIZ) {
 795                 pr_err("Invalid parameter for 'mesh_iface' setting received: interface name too long '%s'\n",
 796                        buff);
 797                 batadv_hardif_free_ref(hard_iface);
 798                 return -EINVAL;
 799         }
 800
 801         if (strncmp(buff, "none", 4) == 0)
 802                 status_tmp = BATADV_IF_NOT_IN_USE;
 803         else
 804                 status_tmp = BATADV_IF_I_WANT_YOU;
 805
 806         if (hard_iface->if_status == status_tmp)
 807                 goto out;
 808
 809         if ((hard_iface->soft_iface) &&
 810             (strncmp(hard_iface->soft_iface->name, buff, IFNAMSIZ) == 0))
 811                 goto out;
 812
 813         rtnl_lock();
 814
 815         if (status_tmp == BATADV_IF_NOT_IN_USE) {
 816                 batadv_hardif_disable_interface(hard_iface,
 817                                                 BATADV_IF_CLEANUP_AUTO);
 818                 goto unlock;
 819         }
 820
 821         /* if the interface already is in use */
 822         if (hard_iface->if_status != BATADV_IF_NOT_IN_USE)
 823                 batadv_hardif_disable_interface(hard_iface,
 824                                                 BATADV_IF_CLEANUP_AUTO);
 825
 826         ret = batadv_hardif_enable_interface(hard_iface, buff);
 827
 828 unlock:
 829         rtnl_unlock();
 830 out:
 831         batadv_hardif_free_ref(hard_iface);
 832         return ret;
 833 }
 834
 835 static ssize_t batadv_show_iface_status(struct kobject *kobj,
 836                                         struct attribute *attr, char *buff)
 837 {
 838         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 839         struct batadv_hard_iface *hard_iface;
 840         ssize_t length;
 841
 842         hard_iface = batadv_hardif_get_by_netdev(net_dev);
 843         if (!hard_iface)
 844                 return 0;
 845
 846         switch (hard_iface->if_status) {
 847         case BATADV_IF_TO_BE_REMOVED:
 848                 length = sprintf(buff, "disabling\n");
 849                 break;
 850         case BATADV_IF_INACTIVE:
 851                 length = sprintf(buff, "inactive\n");
 852                 break;
 853         case BATADV_IF_ACTIVE:
 854                 length = sprintf(buff, "active\n");
 855                 break;
 856         case BATADV_IF_TO_BE_ACTIVATED:
 857                 length = sprintf(buff, "enabling\n");
 858                 break;
 859         case BATADV_IF_NOT_IN_USE:
 860         default:
 861                 length = sprintf(buff, "not in use\n");
 862                 break;
 863         }
 864
 865         batadv_hardif_free_ref(hard_iface);
 866
 867         return length;
 868 }
 869
 870 static BATADV_ATTR(mesh_iface, S_IRUGO | S_IWUSR, batadv_show_mesh_iface,
 871                    batadv_store_mesh_iface);
 872 static BATADV_ATTR(iface_status, S_IRUGO, batadv_show_iface_status, NULL);
 873
 874 static struct batadv_attribute *batadv_batman_attrs[] = {
 875         &batadv_attr_mesh_iface,
 876         &batadv_attr_iface_status,
 877         NULL,
 878 };
 879
 880 int batadv_sysfs_add_hardif(struct kobject **hardif_obj, struct net_device *dev)
 881 {
 882         struct kobject *hardif_kobject = &dev->dev.kobj;
 883         struct batadv_attribute **bat_attr;
 884         int err;
 885
 886         *hardif_obj = kobject_create_and_add(BATADV_SYSFS_IF_BAT_SUBDIR,
 887                                              hardif_kobject);
 888
 889         if (!*hardif_obj) {
 890                 batadv_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
 891                            BATADV_SYSFS_IF_BAT_SUBDIR);
 892                 goto out;
 893         }
 894
 895         for (bat_attr = batadv_batman_attrs; *bat_attr; ++bat_attr) {
 896                 err = sysfs_create_file(*hardif_obj, &((*bat_attr)->attr));
 897                 if (err) {
 898                         batadv_err(dev, "Can't add sysfs file: %s/%s/%s\n",
 899                                    dev->name, BATADV_SYSFS_IF_BAT_SUBDIR,
 900                                    ((*bat_attr)->attr).name);
 901                         goto rem_attr;
 902                 }
 903         }
 904
 905         return 0;
 906
 907 rem_attr:
 908         for (bat_attr = batadv_batman_attrs; *bat_attr; ++bat_attr)
 909                 sysfs_remove_file(*hardif_obj, &((*bat_attr)->attr));
 910 out:
 911         return -ENOMEM;
 912 }
 913
 914 void batadv_sysfs_del_hardif(struct kobject **hardif_obj)
 915 {
 916         kobject_put(*hardif_obj);
 917         *hardif_obj = NULL;
 918 }
 919
 920 int batadv_throw_uevent(struct batadv_priv *bat_priv, enum batadv_uev_type type,
 921                         enum batadv_uev_action action, const char *data)
 922 {
 923         int ret = -ENOMEM;
 924         struct kobject *bat_kobj;
 925         char *uevent_env[4] = { NULL, NULL, NULL, NULL };
 926
 927         bat_kobj = &bat_priv->soft_iface->dev.kobj;
 928
 929         uevent_env[0] = kasprintf(GFP_ATOMIC,
 930                                   "%s%s", BATADV_UEV_TYPE_VAR,
 931                                   batadv_uev_type_str[type]);
 932         if (!uevent_env[0])
 933                 goto out;
 934
 935         uevent_env[1] = kasprintf(GFP_ATOMIC,
 936                                   "%s%s", BATADV_UEV_ACTION_VAR,
 937                                   batadv_uev_action_str[action]);
 938         if (!uevent_env[1])
 939                 goto out;
 940
 941         /* If the event is DEL, ignore the data field */
 942         if (action != BATADV_UEV_DEL) {
 943                 uevent_env[2] = kasprintf(GFP_ATOMIC,
 944                                           "%s%s", BATADV_UEV_DATA_VAR, data);
 945                 if (!uevent_env[2])
 946                         goto out;
 947         }
 948
 949         ret = kobject_uevent_env(bat_kobj, KOBJ_CHANGE, uevent_env);
 950 out:
 951         kfree(uevent_env[0]);
 952         kfree(uevent_env[1]);
 953         kfree(uevent_env[2]);
 954
 955         if (ret)
 956                 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
 957                            "Impossible to send uevent for (%s,%s,%s) event (err: %d)\n",
 958                            batadv_uev_type_str[type],
 959                            batadv_uev_action_str[action],
 960                            (action == BATADV_UEV_DEL ? "NULL" : data), ret);
 961         return ret;
 962 }