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/kref.h>
  29 #include <linux/kernel.h>
  30 #include <linux/netdevice.h>
  31 #include <linux/printk.h>
  32 #include <linux/rculist.h>
  33 #include <linux/rcupdate.h>
  34 #include <linux/rtnetlink.h>
  35 #include <linux/slab.h>
  36 #include <linux/stat.h>
  37 #include <linux/stddef.h>
  38 #include <linux/string.h>
  39 #include <linux/stringify.h>
  40
  41 #include "distributed-arp-table.h"
  42 #include "gateway_client.h"
  43 #include "gateway_common.h"
  44 #include "bridge_loop_avoidance.h"
  45 #include "hard-interface.h"
  46 #include "network-coding.h"
  47 #include "packet.h"
  48 #include "soft-interface.h"
  49
  50 static struct net_device *batadv_kobj_to_netdev(struct kobject *obj)
  51 {
  52         struct device *dev = container_of(obj->parent, struct device, kobj);
  53
  54         return to_net_dev(dev);
  55 }
  56
  57 static struct batadv_priv *batadv_kobj_to_batpriv(struct kobject *obj)
  58 {
  59         struct net_device *net_dev = batadv_kobj_to_netdev(obj);
  60
  61         return netdev_priv(net_dev);
  62 }
  63
  64 /**
  65  * batadv_vlan_kobj_to_batpriv - convert a vlan kobj in the associated batpriv
  66  * @obj: kobject to covert
  67  *
  68  * Return: the associated batadv_priv struct.
  69  */
  70 static struct batadv_priv *batadv_vlan_kobj_to_batpriv(struct kobject *obj)
  71 {
  72         /* VLAN specific attributes are located in the root sysfs folder if they
  73          * refer to the untagged VLAN..
  74          */
  75         if (!strcmp(BATADV_SYSFS_IF_MESH_SUBDIR, obj->name))
  76                 return batadv_kobj_to_batpriv(obj);
  77
  78         /* ..while the attributes for the tagged vlans are located in
  79          * the in the corresponding "vlan%VID" subfolder
  80          */
  81         return batadv_kobj_to_batpriv(obj->parent);
  82 }
  83
  84 /**
  85  * batadv_kobj_to_vlan - convert a kobj in the associated softif_vlan struct
  86  * @bat_priv: the bat priv with all the soft interface information
  87  * @obj: kobject to covert
  88  *
  89  * Return: the associated softif_vlan struct if found, NULL otherwise.
  90  */
  91 static struct batadv_softif_vlan *
  92 batadv_kobj_to_vlan(struct batadv_priv *bat_priv, struct kobject *obj)
  93 {
  94         struct batadv_softif_vlan *vlan_tmp, *vlan = NULL;
  95
  96         rcu_read_lock();
  97         hlist_for_each_entry_rcu(vlan_tmp, &bat_priv->softif_vlan_list, list) {
  98                 if (vlan_tmp->kobj != obj)
  99                         continue;
 100
 101                 if (!kref_get_unless_zero(&vlan_tmp->refcount))
 102                         continue;
 103
 104                 vlan = vlan_tmp;
 105                 break;
 106         }
 107         rcu_read_unlock();
 108
 109         return vlan;
 110 }
 111
 112 #define BATADV_UEV_TYPE_VAR     "BATTYPE="
 113 #define BATADV_UEV_ACTION_VAR   "BATACTION="
 114 #define BATADV_UEV_DATA_VAR     "BATDATA="
 115
 116 static char *batadv_uev_action_str[] = {
 117         "add",
 118         "del",
 119         "change"
 120 };
 121
 122 static char *batadv_uev_type_str[] = {
 123         "gw"
 124 };
 125
 126 /* Use this, if you have customized show and store functions for vlan attrs */
 127 #define BATADV_ATTR_VLAN(_name, _mode, _show, _store)   \
 128 struct batadv_attribute batadv_attr_vlan_##_name = {    \
 129         .attr = {.name = __stringify(_name),            \
 130                  .mode = _mode },                       \
 131         .show   = _show,                                \
 132         .store  = _store,                               \
 133 }
 134
 135 /* Use this, if you have customized show and store functions */
 136 #define BATADV_ATTR(_name, _mode, _show, _store)        \
 137 struct batadv_attribute batadv_attr_##_name = {         \
 138         .attr = {.name = __stringify(_name),            \
 139                  .mode = _mode },                       \
 140         .show   = _show,                                \
 141         .store  = _store,                               \
 142 }
 143
 144 #define BATADV_ATTR_SIF_STORE_BOOL(_name, _post_func)                   \
 145 ssize_t batadv_store_##_name(struct kobject *kobj,                      \
 146                              struct attribute *attr, char *buff,        \
 147                              size_t count)                              \
 148 {                                                                       \
 149         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);       \
 150         struct batadv_priv *bat_priv = netdev_priv(net_dev);            \
 151                                                                         \
 152         return __batadv_store_bool_attr(buff, count, _post_func, attr,  \
 153                                         &bat_priv->_name, net_dev);     \
 154 }
 155
 156 #define BATADV_ATTR_SIF_SHOW_BOOL(_name)                                \
 157 ssize_t batadv_show_##_name(struct kobject *kobj,                       \
 158                             struct attribute *attr, char *buff)         \
 159 {                                                                       \
 160         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);    \
 161                                                                         \
 162         return sprintf(buff, "%s\n",                                    \
 163                        atomic_read(&bat_priv->_name) == 0 ?             \
 164                        "disabled" : "enabled");                         \
 165 }                                                                       \
 166
 167 /* Use this, if you are going to turn a [name] in the soft-interface
 168  * (bat_priv) on or off
 169  */
 170 #define BATADV_ATTR_SIF_BOOL(_name, _mode, _post_func)                  \
 171         static BATADV_ATTR_SIF_STORE_BOOL(_name, _post_func)            \
 172         static BATADV_ATTR_SIF_SHOW_BOOL(_name)                         \
 173         static BATADV_ATTR(_name, _mode, batadv_show_##_name,           \
 174                            batadv_store_##_name)
 175
 176 #define BATADV_ATTR_SIF_STORE_UINT(_name, _var, _min, _max, _post_func) \
 177 ssize_t batadv_store_##_name(struct kobject *kobj,                      \
 178                              struct attribute *attr, char *buff,        \
 179                              size_t count)                              \
 180 {                                                                       \
 181         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);       \
 182         struct batadv_priv *bat_priv = netdev_priv(net_dev);            \
 183                                                                         \
 184         return __batadv_store_uint_attr(buff, count, _min, _max,        \
 185                                         _post_func, attr,               \
 186                                         &bat_priv->_var, net_dev);      \
 187 }
 188
 189 #define BATADV_ATTR_SIF_SHOW_UINT(_name, _var)                          \
 190 ssize_t batadv_show_##_name(struct kobject *kobj,                       \
 191                             struct attribute *attr, char *buff)         \
 192 {                                                                       \
 193         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);    \
 194                                                                         \
 195         return sprintf(buff, "%i\n", atomic_read(&bat_priv->_var));     \
 196 }                                                                       \
 197
 198 /* Use this, if you are going to set [name] in the soft-interface
 199  * (bat_priv) to an unsigned integer value
 200  */
 201 #define BATADV_ATTR_SIF_UINT(_name, _var, _mode, _min, _max, _post_func)\
 202         static BATADV_ATTR_SIF_STORE_UINT(_name, _var, _min, _max, _post_func)\
 203         static BATADV_ATTR_SIF_SHOW_UINT(_name, _var)                   \
 204         static BATADV_ATTR(_name, _mode, batadv_show_##_name,           \
 205                            batadv_store_##_name)
 206
 207 #define BATADV_ATTR_VLAN_STORE_BOOL(_name, _post_func)                  \
 208 ssize_t batadv_store_vlan_##_name(struct kobject *kobj,                 \
 209                                   struct attribute *attr, char *buff,   \
 210                                   size_t count)                         \
 211 {                                                                       \
 212         struct batadv_priv *bat_priv = batadv_vlan_kobj_to_batpriv(kobj);\
 213         struct batadv_softif_vlan *vlan = batadv_kobj_to_vlan(bat_priv, \
 214                                                               kobj);    \
 215         size_t res = __batadv_store_bool_attr(buff, count, _post_func,  \
 216                                               attr, &vlan->_name,       \
 217                                               bat_priv->soft_iface);    \
 218                                                                         \
 219         batadv_softif_vlan_free_ref(vlan);                              \
 220         return res;                                                     \
 221 }
 222
 223 #define BATADV_ATTR_VLAN_SHOW_BOOL(_name)                               \
 224 ssize_t batadv_show_vlan_##_name(struct kobject *kobj,                  \
 225                                  struct attribute *attr, char *buff)    \
 226 {                                                                       \
 227         struct batadv_priv *bat_priv = batadv_vlan_kobj_to_batpriv(kobj);\
 228         struct batadv_softif_vlan *vlan = batadv_kobj_to_vlan(bat_priv, \
 229                                                               kobj);    \
 230         size_t res = sprintf(buff, "%s\n",                              \
 231                              atomic_read(&vlan->_name) == 0 ?           \
 232                              "disabled" : "enabled");                   \
 233                                                                         \
 234         batadv_softif_vlan_free_ref(vlan);                              \
 235         return res;                                                     \
 236 }
 237
 238 /* Use this, if you are going to turn a [name] in the vlan struct on or off */
 239 #define BATADV_ATTR_VLAN_BOOL(_name, _mode, _post_func)                 \
 240         static BATADV_ATTR_VLAN_STORE_BOOL(_name, _post_func)           \
 241         static BATADV_ATTR_VLAN_SHOW_BOOL(_name)                        \
 242         static BATADV_ATTR_VLAN(_name, _mode, batadv_show_vlan_##_name, \
 243                                 batadv_store_vlan_##_name)
 244
 245 static int batadv_store_bool_attr(char *buff, size_t count,
 246                                   struct net_device *net_dev,
 247                                   const char *attr_name, atomic_t *attr,
 248                                   bool *changed)
 249 {
 250         int enabled = -1;
 251
 252         *changed = false;
 253
 254         if (buff[count - 1] == '\n')
 255                 buff[count - 1] = '\0';
 256
 257         if ((strncmp(buff, "1", 2) == 0) ||
 258             (strncmp(buff, "enable", 7) == 0) ||
 259             (strncmp(buff, "enabled", 8) == 0))
 260                 enabled = 1;
 261
 262         if ((strncmp(buff, "0", 2) == 0) ||
 263             (strncmp(buff, "disable", 8) == 0) ||
 264             (strncmp(buff, "disabled", 9) == 0))
 265                 enabled = 0;
 266
 267         if (enabled < 0) {
 268                 batadv_info(net_dev, "%s: Invalid parameter received: %s\n",
 269                             attr_name, buff);
 270                 return -EINVAL;
 271         }
 272
 273         if (atomic_read(attr) == enabled)
 274                 return count;
 275
 276         batadv_info(net_dev, "%s: Changing from: %s to: %s\n", attr_name,
 277                     atomic_read(attr) == 1 ? "enabled" : "disabled",
 278                     enabled == 1 ? "enabled" : "disabled");
 279
 280         *changed = true;
 281
 282         atomic_set(attr, (unsigned int)enabled);
 283         return count;
 284 }
 285
 286 static inline ssize_t
 287 __batadv_store_bool_attr(char *buff, size_t count,
 288                          void (*post_func)(struct net_device *),
 289                          struct attribute *attr,
 290                          atomic_t *attr_store, struct net_device *net_dev)
 291 {
 292         bool changed;
 293         int ret;
 294
 295         ret = batadv_store_bool_attr(buff, count, net_dev, attr->name,
 296                                      attr_store, &changed);
 297         if (post_func && changed)
 298                 post_func(net_dev);
 299
 300         return ret;
 301 }
 302
 303 static int batadv_store_uint_attr(const char *buff, size_t count,
 304                                   struct net_device *net_dev,
 305                                   const char *attr_name,
 306                                   unsigned int min, unsigned int max,
 307                                   atomic_t *attr)
 308 {
 309         unsigned long uint_val;
 310         int ret;
 311
 312         ret = kstrtoul(buff, 10, &uint_val);
 313         if (ret) {
 314                 batadv_info(net_dev, "%s: Invalid parameter received: %s\n",
 315                             attr_name, buff);
 316                 return -EINVAL;
 317         }
 318
 319         if (uint_val < min) {
 320                 batadv_info(net_dev, "%s: Value is too small: %lu min: %u\n",
 321                             attr_name, uint_val, min);
 322                 return -EINVAL;
 323         }
 324
 325         if (uint_val > max) {
 326                 batadv_info(net_dev, "%s: Value is too big: %lu max: %u\n",
 327                             attr_name, uint_val, max);
 328                 return -EINVAL;
 329         }
 330
 331         if (atomic_read(attr) == uint_val)
 332                 return count;
 333
 334         batadv_info(net_dev, "%s: Changing from: %i to: %lu\n",
 335                     attr_name, atomic_read(attr), uint_val);
 336
 337         atomic_set(attr, uint_val);
 338         return count;
 339 }
 340
 341 static inline ssize_t
 342 __batadv_store_uint_attr(const char *buff, size_t count,
 343                          int min, int max,
 344                          void (*post_func)(struct net_device *),
 345                          const struct attribute *attr,
 346                          atomic_t *attr_store, struct net_device *net_dev)
 347 {
 348         int ret;
 349
 350         ret = batadv_store_uint_attr(buff, count, net_dev, attr->name, min, max,
 351                                      attr_store);
 352         if (post_func && ret)
 353                 post_func(net_dev);
 354
 355         return ret;
 356 }
 357
 358 static ssize_t batadv_show_bat_algo(struct kobject *kobj,
 359                                     struct attribute *attr, char *buff)
 360 {
 361         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 362
 363         return sprintf(buff, "%s\n", bat_priv->bat_algo_ops->name);
 364 }
 365
 366 static void batadv_post_gw_reselect(struct net_device *net_dev)
 367 {
 368         struct batadv_priv *bat_priv = netdev_priv(net_dev);
 369
 370         batadv_gw_reselect(bat_priv);
 371 }
 372
 373 static ssize_t batadv_show_gw_mode(struct kobject *kobj, struct attribute *attr,
 374                                    char *buff)
 375 {
 376         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 377         int bytes_written;
 378
 379         switch (atomic_read(&bat_priv->gw_mode)) {
 380         case BATADV_GW_MODE_CLIENT:
 381                 bytes_written = sprintf(buff, "%s\n",
 382                                         BATADV_GW_MODE_CLIENT_NAME);
 383                 break;
 384         case BATADV_GW_MODE_SERVER:
 385                 bytes_written = sprintf(buff, "%s\n",
 386                                         BATADV_GW_MODE_SERVER_NAME);
 387                 break;
 388         default:
 389                 bytes_written = sprintf(buff, "%s\n",
 390                                         BATADV_GW_MODE_OFF_NAME);
 391                 break;
 392         }
 393
 394         return bytes_written;
 395 }
 396
 397 static ssize_t batadv_store_gw_mode(struct kobject *kobj,
 398                                     struct attribute *attr, char *buff,
 399                                     size_t count)
 400 {
 401         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 402         struct batadv_priv *bat_priv = netdev_priv(net_dev);
 403         char *curr_gw_mode_str;
 404         int gw_mode_tmp = -1;
 405
 406         if (buff[count - 1] == '\n')
 407                 buff[count - 1] = '\0';
 408
 409         if (strncmp(buff, BATADV_GW_MODE_OFF_NAME,
 410                     strlen(BATADV_GW_MODE_OFF_NAME)) == 0)
 411                 gw_mode_tmp = BATADV_GW_MODE_OFF;
 412
 413         if (strncmp(buff, BATADV_GW_MODE_CLIENT_NAME,
 414                     strlen(BATADV_GW_MODE_CLIENT_NAME)) == 0)
 415                 gw_mode_tmp = BATADV_GW_MODE_CLIENT;
 416
 417         if (strncmp(buff, BATADV_GW_MODE_SERVER_NAME,
 418                     strlen(BATADV_GW_MODE_SERVER_NAME)) == 0)
 419                 gw_mode_tmp = BATADV_GW_MODE_SERVER;
 420
 421         if (gw_mode_tmp < 0) {
 422                 batadv_info(net_dev,
 423                             "Invalid parameter for 'gw mode' setting received: %s\n",
 424                             buff);
 425                 return -EINVAL;
 426         }
 427
 428         if (atomic_read(&bat_priv->gw_mode) == gw_mode_tmp)
 429                 return count;
 430
 431         switch (atomic_read(&bat_priv->gw_mode)) {
 432         case BATADV_GW_MODE_CLIENT:
 433                 curr_gw_mode_str = BATADV_GW_MODE_CLIENT_NAME;
 434                 break;
 435         case BATADV_GW_MODE_SERVER:
 436                 curr_gw_mode_str = BATADV_GW_MODE_SERVER_NAME;
 437                 break;
 438         default:
 439                 curr_gw_mode_str = BATADV_GW_MODE_OFF_NAME;
 440                 break;
 441         }
 442
 443         batadv_info(net_dev, "Changing gw mode from: %s to: %s\n",
 444                     curr_gw_mode_str, buff);
 445
 446         /* Invoking batadv_gw_reselect() is not enough to really de-select the
 447          * current GW. It will only instruct the gateway client code to perform
 448          * a re-election the next time that this is needed.
 449          *
 450          * When gw client mode is being switched off the current GW must be
 451          * de-selected explicitly otherwise no GW_ADD uevent is thrown on
 452          * client mode re-activation. This is operation is performed in
 453          * batadv_gw_check_client_stop().
 454          */
 455         batadv_gw_reselect(bat_priv);
 456         /* always call batadv_gw_check_client_stop() before changing the gateway
 457          * state
 458          */
 459         batadv_gw_check_client_stop(bat_priv);
 460         atomic_set(&bat_priv->gw_mode, (unsigned int)gw_mode_tmp);
 461         batadv_gw_tvlv_container_update(bat_priv);
 462         return count;
 463 }
 464
 465 static ssize_t batadv_show_gw_bwidth(struct kobject *kobj,
 466                                      struct attribute *attr, char *buff)
 467 {
 468         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 469         u32 down, up;
 470
 471         down = atomic_read(&bat_priv->gw.bandwidth_down);
 472         up = atomic_read(&bat_priv->gw.bandwidth_up);
 473
 474         return sprintf(buff, "%u.%u/%u.%u MBit\n", down / 10,
 475                        down % 10, up / 10, up % 10);
 476 }
 477
 478 static ssize_t batadv_store_gw_bwidth(struct kobject *kobj,
 479                                       struct attribute *attr, char *buff,
 480                                       size_t count)
 481 {
 482         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 483
 484         if (buff[count - 1] == '\n')
 485                 buff[count - 1] = '\0';
 486
 487         return batadv_gw_bandwidth_set(net_dev, buff, count);
 488 }
 489
 490 /**
 491  * batadv_show_isolation_mark - print the current isolation mark/mask
 492  * @kobj: kobject representing the private mesh sysfs directory
 493  * @attr: the batman-adv attribute the user is interacting with
 494  * @buff: the buffer that will contain the data to send back to the user
 495  *
 496  * Return: the number of bytes written into 'buff' on success or a negative
 497  * error code in case of failure
 498  */
 499 static ssize_t batadv_show_isolation_mark(struct kobject *kobj,
 500                                           struct attribute *attr, char *buff)
 501 {
 502         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 503
 504         return sprintf(buff, "%#.8x/%#.8x\n", bat_priv->isolation_mark,
 505                        bat_priv->isolation_mark_mask);
 506 }
 507
 508 /**
 509  * batadv_store_isolation_mark - parse and store the isolation mark/mask entered
 510  *  by the user
 511  * @kobj: kobject representing the private mesh sysfs directory
 512  * @attr: the batman-adv attribute the user is interacting with
 513  * @buff: the buffer containing the user data
 514  * @count: number of bytes in the buffer
 515  *
 516  * Return: 'count' on success or a negative error code in case of failure
 517  */
 518 static ssize_t batadv_store_isolation_mark(struct kobject *kobj,
 519                                            struct attribute *attr, char *buff,
 520                                            size_t count)
 521 {
 522         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 523         struct batadv_priv *bat_priv = netdev_priv(net_dev);
 524         u32 mark, mask;
 525         char *mask_ptr;
 526
 527         /* parse the mask if it has been specified, otherwise assume the mask is
 528          * the biggest possible
 529          */
 530         mask = 0xFFFFFFFF;
 531         mask_ptr = strchr(buff, '/');
 532         if (mask_ptr) {
 533                 *mask_ptr = '\0';
 534                 mask_ptr++;
 535
 536                 /* the mask must be entered in hex base as it is going to be a
 537                  * bitmask and not a prefix length
 538                  */
 539                 if (kstrtou32(mask_ptr, 16, &mask) < 0)
 540                         return -EINVAL;
 541         }
 542
 543         /* the mark can be entered in any base */
 544         if (kstrtou32(buff, 0, &mark) < 0)
 545                 return -EINVAL;
 546
 547         bat_priv->isolation_mark_mask = mask;
 548         /* erase bits not covered by the mask */
 549         bat_priv->isolation_mark = mark & bat_priv->isolation_mark_mask;
 550
 551         batadv_info(net_dev,
 552                     "New skb mark for extended isolation: %#.8x/%#.8x\n",
 553                     bat_priv->isolation_mark, bat_priv->isolation_mark_mask);
 554
 555         return count;
 556 }
 557
 558 BATADV_ATTR_SIF_BOOL(aggregated_ogms, S_IRUGO | S_IWUSR, NULL);
 559 BATADV_ATTR_SIF_BOOL(bonding, S_IRUGO | S_IWUSR, NULL);
 560 #ifdef CONFIG_BATMAN_ADV_BLA
 561 BATADV_ATTR_SIF_BOOL(bridge_loop_avoidance, S_IRUGO | S_IWUSR,
 562                      batadv_bla_status_update);
 563 #endif
 564 #ifdef CONFIG_BATMAN_ADV_DAT
 565 BATADV_ATTR_SIF_BOOL(distributed_arp_table, S_IRUGO | S_IWUSR,
 566                      batadv_dat_status_update);
 567 #endif
 568 BATADV_ATTR_SIF_BOOL(fragmentation, S_IRUGO | S_IWUSR, batadv_update_min_mtu);
 569 static BATADV_ATTR(routing_algo, S_IRUGO, batadv_show_bat_algo, NULL);
 570 static BATADV_ATTR(gw_mode, S_IRUGO | S_IWUSR, batadv_show_gw_mode,
 571                    batadv_store_gw_mode);
 572 BATADV_ATTR_SIF_UINT(orig_interval, orig_interval, S_IRUGO | S_IWUSR,
 573                      2 * BATADV_JITTER, INT_MAX, NULL);
 574 BATADV_ATTR_SIF_UINT(hop_penalty, hop_penalty, S_IRUGO | S_IWUSR, 0,
 575                      BATADV_TQ_MAX_VALUE, NULL);
 576 BATADV_ATTR_SIF_UINT(gw_sel_class, gw_sel_class, S_IRUGO | S_IWUSR, 1,
 577                      BATADV_TQ_MAX_VALUE, batadv_post_gw_reselect);
 578 static BATADV_ATTR(gw_bandwidth, S_IRUGO | S_IWUSR, batadv_show_gw_bwidth,
 579                    batadv_store_gw_bwidth);
 580 #ifdef CONFIG_BATMAN_ADV_MCAST
 581 BATADV_ATTR_SIF_BOOL(multicast_mode, S_IRUGO | S_IWUSR, NULL);
 582 #endif
 583 #ifdef CONFIG_BATMAN_ADV_DEBUG
 584 BATADV_ATTR_SIF_UINT(log_level, log_level, S_IRUGO | S_IWUSR, 0,
 585                      BATADV_DBG_ALL, NULL);
 586 #endif
 587 #ifdef CONFIG_BATMAN_ADV_NC
 588 BATADV_ATTR_SIF_BOOL(network_coding, S_IRUGO | S_IWUSR,
 589                      batadv_nc_status_update);
 590 #endif
 591 static BATADV_ATTR(isolation_mark, S_IRUGO | S_IWUSR,
 592                    batadv_show_isolation_mark, batadv_store_isolation_mark);
 593
 594 static struct batadv_attribute *batadv_mesh_attrs[] = {
 595         &batadv_attr_aggregated_ogms,
 596         &batadv_attr_bonding,
 597 #ifdef CONFIG_BATMAN_ADV_BLA
 598         &batadv_attr_bridge_loop_avoidance,
 599 #endif
 600 #ifdef CONFIG_BATMAN_ADV_DAT
 601         &batadv_attr_distributed_arp_table,
 602 #endif
 603 #ifdef CONFIG_BATMAN_ADV_MCAST
 604         &batadv_attr_multicast_mode,
 605 #endif
 606         &batadv_attr_fragmentation,
 607         &batadv_attr_routing_algo,
 608         &batadv_attr_gw_mode,
 609         &batadv_attr_orig_interval,
 610         &batadv_attr_hop_penalty,
 611         &batadv_attr_gw_sel_class,
 612         &batadv_attr_gw_bandwidth,
 613 #ifdef CONFIG_BATMAN_ADV_DEBUG
 614         &batadv_attr_log_level,
 615 #endif
 616 #ifdef CONFIG_BATMAN_ADV_NC
 617         &batadv_attr_network_coding,
 618 #endif
 619         &batadv_attr_isolation_mark,
 620         NULL,
 621 };
 622
 623 BATADV_ATTR_VLAN_BOOL(ap_isolation, S_IRUGO | S_IWUSR, NULL);
 624
 625 /* array of vlan specific sysfs attributes */
 626 static struct batadv_attribute *batadv_vlan_attrs[] = {
 627         &batadv_attr_vlan_ap_isolation,
 628         NULL,
 629 };
 630
 631 int batadv_sysfs_add_meshif(struct net_device *dev)
 632 {
 633         struct kobject *batif_kobject = &dev->dev.kobj;
 634         struct batadv_priv *bat_priv = netdev_priv(dev);
 635         struct batadv_attribute **bat_attr;
 636         int err;
 637
 638         bat_priv->mesh_obj = kobject_create_and_add(BATADV_SYSFS_IF_MESH_SUBDIR,
 639                                                     batif_kobject);
 640         if (!bat_priv->mesh_obj) {
 641                 batadv_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
 642                            BATADV_SYSFS_IF_MESH_SUBDIR);
 643                 goto out;
 644         }
 645
 646         for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr) {
 647                 err = sysfs_create_file(bat_priv->mesh_obj,
 648                                         &((*bat_attr)->attr));
 649                 if (err) {
 650                         batadv_err(dev, "Can't add sysfs file: %s/%s/%s\n",
 651                                    dev->name, BATADV_SYSFS_IF_MESH_SUBDIR,
 652                                    ((*bat_attr)->attr).name);
 653                         goto rem_attr;
 654                 }
 655         }
 656
 657         return 0;
 658
 659 rem_attr:
 660         for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr)
 661                 sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
 662
 663         kobject_put(bat_priv->mesh_obj);
 664         bat_priv->mesh_obj = NULL;
 665 out:
 666         return -ENOMEM;
 667 }
 668
 669 void batadv_sysfs_del_meshif(struct net_device *dev)
 670 {
 671         struct batadv_priv *bat_priv = netdev_priv(dev);
 672         struct batadv_attribute **bat_attr;
 673
 674         for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr)
 675                 sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
 676
 677         kobject_put(bat_priv->mesh_obj);
 678         bat_priv->mesh_obj = NULL;
 679 }
 680
 681 /**
 682  * batadv_sysfs_add_vlan - add all the needed sysfs objects for the new vlan
 683  * @dev: netdev of the mesh interface
 684  * @vlan: private data of the newly added VLAN interface
 685  *
 686  * Return: 0 on success and -ENOMEM if any of the structure allocations fails.
 687  */
 688 int batadv_sysfs_add_vlan(struct net_device *dev,
 689                           struct batadv_softif_vlan *vlan)
 690 {
 691         char vlan_subdir[sizeof(BATADV_SYSFS_VLAN_SUBDIR_PREFIX) + 5];
 692         struct batadv_priv *bat_priv = netdev_priv(dev);
 693         struct batadv_attribute **bat_attr;
 694         int err;
 695
 696         if (vlan->vid & BATADV_VLAN_HAS_TAG) {
 697                 sprintf(vlan_subdir, BATADV_SYSFS_VLAN_SUBDIR_PREFIX "%hu",
 698                         vlan->vid & VLAN_VID_MASK);
 699
 700                 vlan->kobj = kobject_create_and_add(vlan_subdir,
 701                                                     bat_priv->mesh_obj);
 702                 if (!vlan->kobj) {
 703                         batadv_err(dev, "Can't add sysfs directory: %s/%s\n",
 704                                    dev->name, vlan_subdir);
 705                         goto out;
 706                 }
 707         } else {
 708                 /* the untagged LAN uses the root folder to store its "VLAN
 709                  * specific attributes"
 710                  */
 711                 vlan->kobj = bat_priv->mesh_obj;
 712                 kobject_get(bat_priv->mesh_obj);
 713         }
 714
 715         for (bat_attr = batadv_vlan_attrs; *bat_attr; ++bat_attr) {
 716                 err = sysfs_create_file(vlan->kobj,
 717                                         &((*bat_attr)->attr));
 718                 if (err) {
 719                         batadv_err(dev, "Can't add sysfs file: %s/%s/%s\n",
 720                                    dev->name, vlan_subdir,
 721                                    ((*bat_attr)->attr).name);
 722                         goto rem_attr;
 723                 }
 724         }
 725
 726         return 0;
 727
 728 rem_attr:
 729         for (bat_attr = batadv_vlan_attrs; *bat_attr; ++bat_attr)
 730                 sysfs_remove_file(vlan->kobj, &((*bat_attr)->attr));
 731
 732         kobject_put(vlan->kobj);
 733         vlan->kobj = NULL;
 734 out:
 735         return -ENOMEM;
 736 }
 737
 738 /**
 739  * batadv_sysfs_del_vlan - remove all the sysfs objects for a given VLAN
 740  * @bat_priv: the bat priv with all the soft interface information
 741  * @vlan: the private data of the VLAN to destroy
 742  */
 743 void batadv_sysfs_del_vlan(struct batadv_priv *bat_priv,
 744                            struct batadv_softif_vlan *vlan)
 745 {
 746         struct batadv_attribute **bat_attr;
 747
 748         for (bat_attr = batadv_vlan_attrs; *bat_attr; ++bat_attr)
 749                 sysfs_remove_file(vlan->kobj, &((*bat_attr)->attr));
 750
 751         kobject_put(vlan->kobj);
 752         vlan->kobj = NULL;
 753 }
 754
 755 static ssize_t batadv_show_mesh_iface(struct kobject *kobj,
 756                                       struct attribute *attr, char *buff)
 757 {
 758         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 759         struct batadv_hard_iface *hard_iface;
 760         ssize_t length;
 761         const char *ifname;
 762
 763         hard_iface = batadv_hardif_get_by_netdev(net_dev);
 764         if (!hard_iface)
 765                 return 0;
 766
 767         if (hard_iface->if_status == BATADV_IF_NOT_IN_USE)
 768                 ifname =  "none";
 769         else
 770                 ifname = hard_iface->soft_iface->name;
 771
 772         length = sprintf(buff, "%s\n", ifname);
 773
 774         batadv_hardif_free_ref(hard_iface);
 775
 776         return length;
 777 }
 778
 779 static ssize_t batadv_store_mesh_iface(struct kobject *kobj,
 780                                        struct attribute *attr, char *buff,
 781                                        size_t count)
 782 {
 783         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 784         struct batadv_hard_iface *hard_iface;
 785         int status_tmp = -1;
 786         int ret = count;
 787
 788         hard_iface = batadv_hardif_get_by_netdev(net_dev);
 789         if (!hard_iface)
 790                 return count;
 791
 792         if (buff[count - 1] == '\n')
 793                 buff[count - 1] = '\0';
 794
 795         if (strlen(buff) >= IFNAMSIZ) {
 796                 pr_err("Invalid parameter for 'mesh_iface' setting received: interface name too long '%s'\n",
 797                        buff);
 798                 batadv_hardif_free_ref(hard_iface);
 799                 return -EINVAL;
 800         }
 801
 802         if (strncmp(buff, "none", 4) == 0)
 803                 status_tmp = BATADV_IF_NOT_IN_USE;
 804         else
 805                 status_tmp = BATADV_IF_I_WANT_YOU;
 806
 807         if (hard_iface->if_status == status_tmp)
 808                 goto out;
 809
 810         if ((hard_iface->soft_iface) &&
 811             (strncmp(hard_iface->soft_iface->name, buff, IFNAMSIZ) == 0))
 812                 goto out;
 813
 814         rtnl_lock();
 815
 816         if (status_tmp == BATADV_IF_NOT_IN_USE) {
 817                 batadv_hardif_disable_interface(hard_iface,
 818                                                 BATADV_IF_CLEANUP_AUTO);
 819                 goto unlock;
 820         }
 821
 822         /* if the interface already is in use */
 823         if (hard_iface->if_status != BATADV_IF_NOT_IN_USE)
 824                 batadv_hardif_disable_interface(hard_iface,
 825                                                 BATADV_IF_CLEANUP_AUTO);
 826
 827         ret = batadv_hardif_enable_interface(hard_iface, buff);
 828
 829 unlock:
 830         rtnl_unlock();
 831 out:
 832         batadv_hardif_free_ref(hard_iface);
 833         return ret;
 834 }
 835
 836 static ssize_t batadv_show_iface_status(struct kobject *kobj,
 837                                         struct attribute *attr, char *buff)
 838 {
 839         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 840         struct batadv_hard_iface *hard_iface;
 841         ssize_t length;
 842
 843         hard_iface = batadv_hardif_get_by_netdev(net_dev);
 844         if (!hard_iface)
 845                 return 0;
 846
 847         switch (hard_iface->if_status) {
 848         case BATADV_IF_TO_BE_REMOVED:
 849                 length = sprintf(buff, "disabling\n");
 850                 break;
 851         case BATADV_IF_INACTIVE:
 852                 length = sprintf(buff, "inactive\n");
 853                 break;
 854         case BATADV_IF_ACTIVE:
 855                 length = sprintf(buff, "active\n");
 856                 break;
 857         case BATADV_IF_TO_BE_ACTIVATED:
 858                 length = sprintf(buff, "enabling\n");
 859                 break;
 860         case BATADV_IF_NOT_IN_USE:
 861         default:
 862                 length = sprintf(buff, "not in use\n");
 863                 break;
 864         }
 865
 866         batadv_hardif_free_ref(hard_iface);
 867
 868         return length;
 869 }
 870
 871 static BATADV_ATTR(mesh_iface, S_IRUGO | S_IWUSR, batadv_show_mesh_iface,
 872                    batadv_store_mesh_iface);
 873 static BATADV_ATTR(iface_status, S_IRUGO, batadv_show_iface_status, NULL);
 874
 875 static struct batadv_attribute *batadv_batman_attrs[] = {
 876         &batadv_attr_mesh_iface,
 877         &batadv_attr_iface_status,
 878         NULL,
 879 };
 880
 881 int batadv_sysfs_add_hardif(struct kobject **hardif_obj, struct net_device *dev)
 882 {
 883         struct kobject *hardif_kobject = &dev->dev.kobj;
 884         struct batadv_attribute **bat_attr;
 885         int err;
 886
 887         *hardif_obj = kobject_create_and_add(BATADV_SYSFS_IF_BAT_SUBDIR,
 888                                              hardif_kobject);
 889
 890         if (!*hardif_obj) {
 891                 batadv_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
 892                            BATADV_SYSFS_IF_BAT_SUBDIR);
 893                 goto out;
 894         }
 895
 896         for (bat_attr = batadv_batman_attrs; *bat_attr; ++bat_attr) {
 897                 err = sysfs_create_file(*hardif_obj, &((*bat_attr)->attr));
 898                 if (err) {
 899                         batadv_err(dev, "Can't add sysfs file: %s/%s/%s\n",
 900                                    dev->name, BATADV_SYSFS_IF_BAT_SUBDIR,
 901                                    ((*bat_attr)->attr).name);
 902                         goto rem_attr;
 903                 }
 904         }
 905
 906         return 0;
 907
 908 rem_attr:
 909         for (bat_attr = batadv_batman_attrs; *bat_attr; ++bat_attr)
 910                 sysfs_remove_file(*hardif_obj, &((*bat_attr)->attr));
 911 out:
 912         return -ENOMEM;
 913 }
 914
 915 void batadv_sysfs_del_hardif(struct kobject **hardif_obj)
 916 {
 917         kobject_put(*hardif_obj);
 918         *hardif_obj = NULL;
 919 }
 920
 921 int batadv_throw_uevent(struct batadv_priv *bat_priv, enum batadv_uev_type type,
 922                         enum batadv_uev_action action, const char *data)
 923 {
 924         int ret = -ENOMEM;
 925         struct kobject *bat_kobj;
 926         char *uevent_env[4] = { NULL, NULL, NULL, NULL };
 927
 928         bat_kobj = &bat_priv->soft_iface->dev.kobj;
 929
 930         uevent_env[0] = kasprintf(GFP_ATOMIC,
 931                                   "%s%s", BATADV_UEV_TYPE_VAR,
 932                                   batadv_uev_type_str[type]);
 933         if (!uevent_env[0])
 934                 goto out;
 935
 936         uevent_env[1] = kasprintf(GFP_ATOMIC,
 937                                   "%s%s", BATADV_UEV_ACTION_VAR,
 938                                   batadv_uev_action_str[action]);
 939         if (!uevent_env[1])
 940                 goto out;
 941
 942         /* If the event is DEL, ignore the data field */
 943         if (action != BATADV_UEV_DEL) {
 944                 uevent_env[2] = kasprintf(GFP_ATOMIC,
 945                                           "%s%s", BATADV_UEV_DATA_VAR, data);
 946                 if (!uevent_env[2])
 947                         goto out;
 948         }
 949
 950         ret = kobject_uevent_env(bat_kobj, KOBJ_CHANGE, uevent_env);
 951 out:
 952         kfree(uevent_env[0]);
 953         kfree(uevent_env[1]);
 954         kfree(uevent_env[2]);
 955
 956         if (ret)
 957                 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
 958                            "Impossible to send uevent for (%s,%s,%s) event (err: %d)\n",
 959                            batadv_uev_type_str[type],
 960                            batadv_uev_action_str[action],
 961                            (action == BATADV_UEV_DEL ? "NULL" : data), ret);
 962         return ret;
 963 }