net/batman-adv/sysfs.c

   1 /* Copyright (C) 2010-2015 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 "hard-interface.h"
  44 #include "network-coding.h"
  45 #include "packet.h"
  46 #include "soft-interface.h"
  47
  48 static struct net_device *batadv_kobj_to_netdev(struct kobject *obj)
  49 {
  50         struct device *dev = container_of(obj->parent, struct device, kobj);
  51
  52         return to_net_dev(dev);
  53 }
  54
  55 static struct batadv_priv *batadv_kobj_to_batpriv(struct kobject *obj)
  56 {
  57         struct net_device *net_dev = batadv_kobj_to_netdev(obj);
  58
  59         return netdev_priv(net_dev);
  60 }
  61
  62 /**
  63  * batadv_vlan_kobj_to_batpriv - convert a vlan kobj in the associated batpriv
  64  * @obj: kobject to covert
  65  *
  66  * Returns the associated batadv_priv struct.
  67  */
  68 static struct batadv_priv *batadv_vlan_kobj_to_batpriv(struct kobject *obj)
  69 {
  70         /* VLAN specific attributes are located in the root sysfs folder if they
  71          * refer to the untagged VLAN..
  72          */
  73         if (!strcmp(BATADV_SYSFS_IF_MESH_SUBDIR, obj->name))
  74                 return batadv_kobj_to_batpriv(obj);
  75
  76         /* ..while the attributes for the tagged vlans are located in
  77          * the in the corresponding "vlan%VID" subfolder
  78          */
  79         return batadv_kobj_to_batpriv(obj->parent);
  80 }
  81
  82 /**
  83  * batadv_kobj_to_vlan - convert a kobj in the associated softif_vlan struct
  84  * @obj: kobject to covert
  85  *
  86  * Returns the associated softif_vlan struct if found, NULL otherwise.
  87  */
  88 static struct batadv_softif_vlan *
  89 batadv_kobj_to_vlan(struct batadv_priv *bat_priv, struct kobject *obj)
  90 {
  91         struct batadv_softif_vlan *vlan_tmp, *vlan = NULL;
  92
  93         rcu_read_lock();
  94         hlist_for_each_entry_rcu(vlan_tmp, &bat_priv->softif_vlan_list, list) {
  95                 if (vlan_tmp->kobj != obj)
  96                         continue;
  97
  98                 if (!atomic_inc_not_zero(&vlan_tmp->refcount))
  99                         continue;
 100
 101                 vlan = vlan_tmp;
 102                 break;
 103         }
 104         rcu_read_unlock();
 105
 106         return vlan;
 107 }
 108
 109 #define BATADV_UEV_TYPE_VAR     "BATTYPE="
 110 #define BATADV_UEV_ACTION_VAR   "BATACTION="
 111 #define BATADV_UEV_DATA_VAR     "BATDATA="
 112
 113 static char *batadv_uev_action_str[] = {
 114         "add",
 115         "del",
 116         "change"
 117 };
 118
 119 static char *batadv_uev_type_str[] = {
 120         "gw"
 121 };
 122
 123 /* Use this, if you have customized show and store functions for vlan attrs */
 124 #define BATADV_ATTR_VLAN(_name, _mode, _show, _store)   \
 125 struct batadv_attribute batadv_attr_vlan_##_name = {    \
 126         .attr = {.name = __stringify(_name),            \
 127                  .mode = _mode },                       \
 128         .show   = _show,                                \
 129         .store  = _store,                               \
 130 }
 131
 132 /* Use this, if you have customized show and store functions */
 133 #define BATADV_ATTR(_name, _mode, _show, _store)        \
 134 struct batadv_attribute batadv_attr_##_name = {         \
 135         .attr = {.name = __stringify(_name),            \
 136                  .mode = _mode },                       \
 137         .show   = _show,                                \
 138         .store  = _store,                               \
 139 }
 140
 141 #define BATADV_ATTR_SIF_STORE_BOOL(_name, _post_func)                   \
 142 ssize_t batadv_store_##_name(struct kobject *kobj,                      \
 143                              struct attribute *attr, char *buff,        \
 144                              size_t count)                              \
 145 {                                                                       \
 146         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);       \
 147         struct batadv_priv *bat_priv = netdev_priv(net_dev);            \
 148                                                                         \
 149         return __batadv_store_bool_attr(buff, count, _post_func, attr,  \
 150                                         &bat_priv->_name, net_dev);     \
 151 }
 152
 153 #define BATADV_ATTR_SIF_SHOW_BOOL(_name)                                \
 154 ssize_t batadv_show_##_name(struct kobject *kobj,                       \
 155                             struct attribute *attr, char *buff)         \
 156 {                                                                       \
 157         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);    \
 158                                                                         \
 159         return sprintf(buff, "%s\n",                                    \
 160                        atomic_read(&bat_priv->_name) == 0 ?             \
 161                        "disabled" : "enabled");                         \
 162 }                                                                       \
 163
 164 /* Use this, if you are going to turn a [name] in the soft-interface
 165  * (bat_priv) on or off
 166  */
 167 #define BATADV_ATTR_SIF_BOOL(_name, _mode, _post_func)                  \
 168         static BATADV_ATTR_SIF_STORE_BOOL(_name, _post_func)            \
 169         static BATADV_ATTR_SIF_SHOW_BOOL(_name)                         \
 170         static BATADV_ATTR(_name, _mode, batadv_show_##_name,           \
 171                            batadv_store_##_name)
 172
 173 #define BATADV_ATTR_SIF_STORE_UINT(_name, _var, _min, _max, _post_func) \
 174 ssize_t batadv_store_##_name(struct kobject *kobj,                      \
 175                              struct attribute *attr, char *buff,        \
 176                              size_t count)                              \
 177 {                                                                       \
 178         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);       \
 179         struct batadv_priv *bat_priv = netdev_priv(net_dev);            \
 180                                                                         \
 181         return __batadv_store_uint_attr(buff, count, _min, _max,        \
 182                                         _post_func, attr,               \
 183                                         &bat_priv->_var, net_dev);      \
 184 }
 185
 186 #define BATADV_ATTR_SIF_SHOW_UINT(_name, _var)                          \
 187 ssize_t batadv_show_##_name(struct kobject *kobj,                       \
 188                             struct attribute *attr, char *buff)         \
 189 {                                                                       \
 190         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);    \
 191                                                                         \
 192         return sprintf(buff, "%i\n", atomic_read(&bat_priv->_var));     \
 193 }                                                                       \
 194
 195 /* Use this, if you are going to set [name] in the soft-interface
 196  * (bat_priv) to an unsigned integer value
 197  */
 198 #define BATADV_ATTR_SIF_UINT(_name, _var, _mode, _min, _max, _post_func)\
 199         static BATADV_ATTR_SIF_STORE_UINT(_name, _var, _min, _max, _post_func)\
 200         static BATADV_ATTR_SIF_SHOW_UINT(_name, _var)                   \
 201         static BATADV_ATTR(_name, _mode, batadv_show_##_name,           \
 202                            batadv_store_##_name)
 203
 204 #define BATADV_ATTR_VLAN_STORE_BOOL(_name, _post_func)                  \
 205 ssize_t batadv_store_vlan_##_name(struct kobject *kobj,                 \
 206                                   struct attribute *attr, char *buff,   \
 207                                   size_t count)                         \
 208 {                                                                       \
 209         struct batadv_priv *bat_priv = batadv_vlan_kobj_to_batpriv(kobj);\
 210         struct batadv_softif_vlan *vlan = batadv_kobj_to_vlan(bat_priv, \
 211                                                               kobj);    \
 212         size_t res = __batadv_store_bool_attr(buff, count, _post_func,  \
 213                                               attr, &vlan->_name,       \
 214                                               bat_priv->soft_iface);    \
 215                                                                         \
 216         batadv_softif_vlan_free_ref(vlan);                              \
 217         return res;                                                     \
 218 }
 219
 220 #define BATADV_ATTR_VLAN_SHOW_BOOL(_name)                               \
 221 ssize_t batadv_show_vlan_##_name(struct kobject *kobj,                  \
 222                                  struct attribute *attr, char *buff)    \
 223 {                                                                       \
 224         struct batadv_priv *bat_priv = batadv_vlan_kobj_to_batpriv(kobj);\
 225         struct batadv_softif_vlan *vlan = batadv_kobj_to_vlan(bat_priv, \
 226                                                               kobj);    \
 227         size_t res = sprintf(buff, "%s\n",                              \
 228                              atomic_read(&vlan->_name) == 0 ?           \
 229                              "disabled" : "enabled");                   \
 230                                                                         \
 231         batadv_softif_vlan_free_ref(vlan);                              \
 232         return res;                                                     \
 233 }
 234
 235 /* Use this, if you are going to turn a [name] in the vlan struct on or off */
 236 #define BATADV_ATTR_VLAN_BOOL(_name, _mode, _post_func)                 \
 237         static BATADV_ATTR_VLAN_STORE_BOOL(_name, _post_func)           \
 238         static BATADV_ATTR_VLAN_SHOW_BOOL(_name)                        \
 239         static BATADV_ATTR_VLAN(_name, _mode, batadv_show_vlan_##_name, \
 240                                 batadv_store_vlan_##_name)
 241
 242 static int batadv_store_bool_attr(char *buff, size_t count,
 243                                   struct net_device *net_dev,
 244                                   const char *attr_name, atomic_t *attr)
 245 {
 246         int enabled = -1;
 247
 248         if (buff[count - 1] == '\n')
 249                 buff[count - 1] = '\0';
 250
 251         if ((strncmp(buff, "1", 2) == 0) ||
 252             (strncmp(buff, "enable", 7) == 0) ||
 253             (strncmp(buff, "enabled", 8) == 0))
 254                 enabled = 1;
 255
 256         if ((strncmp(buff, "0", 2) == 0) ||
 257             (strncmp(buff, "disable", 8) == 0) ||
 258             (strncmp(buff, "disabled", 9) == 0))
 259                 enabled = 0;
 260
 261         if (enabled < 0) {
 262                 batadv_info(net_dev, "%s: Invalid parameter received: %s\n",
 263                             attr_name, buff);
 264                 return -EINVAL;
 265         }
 266
 267         if (atomic_read(attr) == enabled)
 268                 return count;
 269
 270         batadv_info(net_dev, "%s: Changing from: %s to: %s\n", attr_name,
 271                     atomic_read(attr) == 1 ? "enabled" : "disabled",
 272                     enabled == 1 ? "enabled" : "disabled");
 273
 274         atomic_set(attr, (unsigned int)enabled);
 275         return count;
 276 }
 277
 278 static inline ssize_t
 279 __batadv_store_bool_attr(char *buff, size_t count,
 280                          void (*post_func)(struct net_device *),
 281                          struct attribute *attr,
 282                          atomic_t *attr_store, struct net_device *net_dev)
 283 {
 284         int ret;
 285
 286         ret = batadv_store_bool_attr(buff, count, net_dev, attr->name,
 287                                      attr_store);
 288         if (post_func && ret)
 289                 post_func(net_dev);
 290
 291         return ret;
 292 }
 293
 294 static int batadv_store_uint_attr(const char *buff, size_t count,
 295                                   struct net_device *net_dev,
 296                                   const char *attr_name,
 297                                   unsigned int min, unsigned int max,
 298                                   atomic_t *attr)
 299 {
 300         unsigned long uint_val;
 301         int ret;
 302
 303         ret = kstrtoul(buff, 10, &uint_val);
 304         if (ret) {
 305                 batadv_info(net_dev, "%s: Invalid parameter received: %s\n",
 306                             attr_name, buff);
 307                 return -EINVAL;
 308         }
 309
 310         if (uint_val < min) {
 311                 batadv_info(net_dev, "%s: Value is too small: %lu min: %u\n",
 312                             attr_name, uint_val, min);
 313                 return -EINVAL;
 314         }
 315
 316         if (uint_val > max) {
 317                 batadv_info(net_dev, "%s: Value is too big: %lu max: %u\n",
 318                             attr_name, uint_val, max);
 319                 return -EINVAL;
 320         }
 321
 322         if (atomic_read(attr) == uint_val)
 323                 return count;
 324
 325         batadv_info(net_dev, "%s: Changing from: %i to: %lu\n",
 326                     attr_name, atomic_read(attr), uint_val);
 327
 328         atomic_set(attr, uint_val);
 329         return count;
 330 }
 331
 332 static inline ssize_t
 333 __batadv_store_uint_attr(const char *buff, size_t count,
 334                          int min, int max,
 335                          void (*post_func)(struct net_device *),
 336                          const struct attribute *attr,
 337                          atomic_t *attr_store, struct net_device *net_dev)
 338 {
 339         int ret;
 340
 341         ret = batadv_store_uint_attr(buff, count, net_dev, attr->name, min, max,
 342                                      attr_store);
 343         if (post_func && ret)
 344                 post_func(net_dev);
 345
 346         return ret;
 347 }
 348
 349 static ssize_t batadv_show_bat_algo(struct kobject *kobj,
 350                                     struct attribute *attr, char *buff)
 351 {
 352         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 353
 354         return sprintf(buff, "%s\n", bat_priv->bat_algo_ops->name);
 355 }
 356
 357 static void batadv_post_gw_reselect(struct net_device *net_dev)
 358 {
 359         struct batadv_priv *bat_priv = netdev_priv(net_dev);
 360
 361         batadv_gw_reselect(bat_priv);
 362 }
 363
 364 static ssize_t batadv_show_gw_mode(struct kobject *kobj, struct attribute *attr,
 365                                    char *buff)
 366 {
 367         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 368         int bytes_written;
 369
 370         switch (atomic_read(&bat_priv->gw_mode)) {
 371         case BATADV_GW_MODE_CLIENT:
 372                 bytes_written = sprintf(buff, "%s\n",
 373                                         BATADV_GW_MODE_CLIENT_NAME);
 374                 break;
 375         case BATADV_GW_MODE_SERVER:
 376                 bytes_written = sprintf(buff, "%s\n",
 377                                         BATADV_GW_MODE_SERVER_NAME);
 378                 break;
 379         default:
 380                 bytes_written = sprintf(buff, "%s\n",
 381                                         BATADV_GW_MODE_OFF_NAME);
 382                 break;
 383         }
 384
 385         return bytes_written;
 386 }
 387
 388 static ssize_t batadv_store_gw_mode(struct kobject *kobj,
 389                                     struct attribute *attr, char *buff,
 390                                     size_t count)
 391 {
 392         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 393         struct batadv_priv *bat_priv = netdev_priv(net_dev);
 394         char *curr_gw_mode_str;
 395         int gw_mode_tmp = -1;
 396
 397         if (buff[count - 1] == '\n')
 398                 buff[count - 1] = '\0';
 399
 400         if (strncmp(buff, BATADV_GW_MODE_OFF_NAME,
 401                     strlen(BATADV_GW_MODE_OFF_NAME)) == 0)
 402                 gw_mode_tmp = BATADV_GW_MODE_OFF;
 403
 404         if (strncmp(buff, BATADV_GW_MODE_CLIENT_NAME,
 405                     strlen(BATADV_GW_MODE_CLIENT_NAME)) == 0)
 406                 gw_mode_tmp = BATADV_GW_MODE_CLIENT;
 407
 408         if (strncmp(buff, BATADV_GW_MODE_SERVER_NAME,
 409                     strlen(BATADV_GW_MODE_SERVER_NAME)) == 0)
 410                 gw_mode_tmp = BATADV_GW_MODE_SERVER;
 411
 412         if (gw_mode_tmp < 0) {
 413                 batadv_info(net_dev,
 414                             "Invalid parameter for 'gw mode' setting received: %s\n",
 415                             buff);
 416                 return -EINVAL;
 417         }
 418
 419         if (atomic_read(&bat_priv->gw_mode) == gw_mode_tmp)
 420                 return count;
 421
 422         switch (atomic_read(&bat_priv->gw_mode)) {
 423         case BATADV_GW_MODE_CLIENT:
 424                 curr_gw_mode_str = BATADV_GW_MODE_CLIENT_NAME;
 425                 break;
 426         case BATADV_GW_MODE_SERVER:
 427                 curr_gw_mode_str = BATADV_GW_MODE_SERVER_NAME;
 428                 break;
 429         default:
 430                 curr_gw_mode_str = BATADV_GW_MODE_OFF_NAME;
 431                 break;
 432         }
 433
 434         batadv_info(net_dev, "Changing gw mode from: %s to: %s\n",
 435                     curr_gw_mode_str, buff);
 436
 437         /* Invoking batadv_gw_reselect() is not enough to really de-select the
 438          * current GW. It will only instruct the gateway client code to perform
 439          * a re-election the next time that this is needed.
 440          *
 441          * When gw client mode is being switched off the current GW must be
 442          * de-selected explicitly otherwise no GW_ADD uevent is thrown on
 443          * client mode re-activation. This is operation is performed in
 444          * batadv_gw_check_client_stop().
 445          */
 446         batadv_gw_reselect(bat_priv);
 447         /* always call batadv_gw_check_client_stop() before changing the gateway
 448          * state
 449          */
 450         batadv_gw_check_client_stop(bat_priv);
 451         atomic_set(&bat_priv->gw_mode, (unsigned int)gw_mode_tmp);
 452         batadv_gw_tvlv_container_update(bat_priv);
 453         return count;
 454 }
 455
 456 static ssize_t batadv_show_gw_bwidth(struct kobject *kobj,
 457                                      struct attribute *attr, char *buff)
 458 {
 459         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 460         uint32_t down, up;
 461
 462         down = atomic_read(&bat_priv->gw.bandwidth_down);
 463         up = atomic_read(&bat_priv->gw.bandwidth_up);
 464
 465         return sprintf(buff, "%u.%u/%u.%u MBit\n", down / 10,
 466                        down % 10, up / 10, up % 10);
 467 }
 468
 469 static ssize_t batadv_store_gw_bwidth(struct kobject *kobj,
 470                                       struct attribute *attr, char *buff,
 471                                       size_t count)
 472 {
 473         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 474
 475         if (buff[count - 1] == '\n')
 476                 buff[count - 1] = '\0';
 477
 478         return batadv_gw_bandwidth_set(net_dev, buff, count);
 479 }
 480
 481 /**
 482  * batadv_show_isolation_mark - print the current isolation mark/mask
 483  * @kobj: kobject representing the private mesh sysfs directory
 484  * @attr: the batman-adv attribute the user is interacting with
 485  * @buff: the buffer that will contain the data to send back to the user
 486  *
 487  * Returns the number of bytes written into 'buff' on success or a negative
 488  * error code in case of failure
 489  */
 490 static ssize_t batadv_show_isolation_mark(struct kobject *kobj,
 491                                           struct attribute *attr, char *buff)
 492 {
 493         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 494
 495         return sprintf(buff, "%#.8x/%#.8x\n", bat_priv->isolation_mark,
 496                        bat_priv->isolation_mark_mask);
 497 }
 498
 499 /**
 500  * batadv_store_isolation_mark - parse and store the isolation mark/mask entered
 501  *  by the user
 502  * @kobj: kobject representing the private mesh sysfs directory
 503  * @attr: the batman-adv attribute the user is interacting with
 504  * @buff: the buffer containing the user data
 505  * @count: number of bytes in the buffer
 506  *
 507  * Returns 'count' on success or a negative error code in case of failure
 508  */
 509 static ssize_t batadv_store_isolation_mark(struct kobject *kobj,
 510                                            struct attribute *attr, char *buff,
 511                                            size_t count)
 512 {
 513         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 514         struct batadv_priv *bat_priv = netdev_priv(net_dev);
 515         uint32_t mark, mask;
 516         char *mask_ptr;
 517
 518         /* parse the mask if it has been specified, otherwise assume the mask is
 519          * the biggest possible
 520          */
 521         mask = 0xFFFFFFFF;
 522         mask_ptr = strchr(buff, '/');
 523         if (mask_ptr) {
 524                 *mask_ptr = '\0';
 525                 mask_ptr++;
 526
 527                 /* the mask must be entered in hex base as it is going to be a
 528                  * bitmask and not a prefix length
 529                  */
 530                 if (kstrtou32(mask_ptr, 16, &mask) < 0)
 531                         return -EINVAL;
 532         }
 533
 534         /* the mark can be entered in any base */
 535         if (kstrtou32(buff, 0, &mark) < 0)
 536                 return -EINVAL;
 537
 538         bat_priv->isolation_mark_mask = mask;
 539         /* erase bits not covered by the mask */
 540         bat_priv->isolation_mark = mark & bat_priv->isolation_mark_mask;
 541
 542         batadv_info(net_dev,
 543                     "New skb mark for extended isolation: %#.8x/%#.8x\n",
 544                     bat_priv->isolation_mark, bat_priv->isolation_mark_mask);
 545
 546         return count;
 547 }
 548
 549 BATADV_ATTR_SIF_BOOL(aggregated_ogms, S_IRUGO | S_IWUSR, NULL);
 550 BATADV_ATTR_SIF_BOOL(bonding, S_IRUGO | S_IWUSR, NULL);
 551 #ifdef CONFIG_BATMAN_ADV_BLA
 552 BATADV_ATTR_SIF_BOOL(bridge_loop_avoidance, S_IRUGO | S_IWUSR, NULL);
 553 #endif
 554 #ifdef CONFIG_BATMAN_ADV_DAT
 555 BATADV_ATTR_SIF_BOOL(distributed_arp_table, S_IRUGO | S_IWUSR,
 556                      batadv_dat_status_update);
 557 #endif
 558 BATADV_ATTR_SIF_BOOL(fragmentation, S_IRUGO | S_IWUSR, batadv_update_min_mtu);
 559 static BATADV_ATTR(routing_algo, S_IRUGO, batadv_show_bat_algo, NULL);
 560 static BATADV_ATTR(gw_mode, S_IRUGO | S_IWUSR, batadv_show_gw_mode,
 561                    batadv_store_gw_mode);
 562 BATADV_ATTR_SIF_UINT(orig_interval, orig_interval, S_IRUGO | S_IWUSR,
 563                      2 * BATADV_JITTER, INT_MAX, NULL);
 564 BATADV_ATTR_SIF_UINT(hop_penalty, hop_penalty, S_IRUGO | S_IWUSR, 0,
 565                      BATADV_TQ_MAX_VALUE, NULL);
 566 BATADV_ATTR_SIF_UINT(gw_sel_class, gw_sel_class, S_IRUGO | S_IWUSR, 1,
 567                      BATADV_TQ_MAX_VALUE, batadv_post_gw_reselect);
 568 static BATADV_ATTR(gw_bandwidth, S_IRUGO | S_IWUSR, batadv_show_gw_bwidth,
 569                    batadv_store_gw_bwidth);
 570 #ifdef CONFIG_BATMAN_ADV_MCAST
 571 BATADV_ATTR_SIF_BOOL(multicast_mode, S_IRUGO | S_IWUSR, NULL);
 572 #endif
 573 #ifdef CONFIG_BATMAN_ADV_DEBUG
 574 BATADV_ATTR_SIF_UINT(log_level, log_level, S_IRUGO | S_IWUSR, 0,
 575                      BATADV_DBG_ALL, NULL);
 576 #endif
 577 #ifdef CONFIG_BATMAN_ADV_NC
 578 BATADV_ATTR_SIF_BOOL(network_coding, S_IRUGO | S_IWUSR,
 579                      batadv_nc_status_update);
 580 #endif
 581 static BATADV_ATTR(isolation_mark, S_IRUGO | S_IWUSR,
 582                    batadv_show_isolation_mark, batadv_store_isolation_mark);
 583
 584 static struct batadv_attribute *batadv_mesh_attrs[] = {
 585         &batadv_attr_aggregated_ogms,
 586         &batadv_attr_bonding,
 587 #ifdef CONFIG_BATMAN_ADV_BLA
 588         &batadv_attr_bridge_loop_avoidance,
 589 #endif
 590 #ifdef CONFIG_BATMAN_ADV_DAT
 591         &batadv_attr_distributed_arp_table,
 592 #endif
 593 #ifdef CONFIG_BATMAN_ADV_MCAST
 594         &batadv_attr_multicast_mode,
 595 #endif
 596         &batadv_attr_fragmentation,
 597         &batadv_attr_routing_algo,
 598         &batadv_attr_gw_mode,
 599         &batadv_attr_orig_interval,
 600         &batadv_attr_hop_penalty,
 601         &batadv_attr_gw_sel_class,
 602         &batadv_attr_gw_bandwidth,
 603 #ifdef CONFIG_BATMAN_ADV_DEBUG
 604         &batadv_attr_log_level,
 605 #endif
 606 #ifdef CONFIG_BATMAN_ADV_NC
 607         &batadv_attr_network_coding,
 608 #endif
 609         &batadv_attr_isolation_mark,
 610         NULL,
 611 };
 612
 613 BATADV_ATTR_VLAN_BOOL(ap_isolation, S_IRUGO | S_IWUSR, NULL);
 614
 615 /**
 616  * batadv_vlan_attrs - array of vlan specific sysfs attributes
 617  */
 618 static struct batadv_attribute *batadv_vlan_attrs[] = {
 619         &batadv_attr_vlan_ap_isolation,
 620         NULL,
 621 };
 622
 623 int batadv_sysfs_add_meshif(struct net_device *dev)
 624 {
 625         struct kobject *batif_kobject = &dev->dev.kobj;
 626         struct batadv_priv *bat_priv = netdev_priv(dev);
 627         struct batadv_attribute **bat_attr;
 628         int err;
 629
 630         bat_priv->mesh_obj = kobject_create_and_add(BATADV_SYSFS_IF_MESH_SUBDIR,
 631                                                     batif_kobject);
 632         if (!bat_priv->mesh_obj) {
 633                 batadv_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
 634                            BATADV_SYSFS_IF_MESH_SUBDIR);
 635                 goto out;
 636         }
 637
 638         for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr) {
 639                 err = sysfs_create_file(bat_priv->mesh_obj,
 640                                         &((*bat_attr)->attr));
 641                 if (err) {
 642                         batadv_err(dev, "Can't add sysfs file: %s/%s/%s\n",
 643                                    dev->name, BATADV_SYSFS_IF_MESH_SUBDIR,
 644                                    ((*bat_attr)->attr).name);
 645                         goto rem_attr;
 646                 }
 647         }
 648
 649         return 0;
 650
 651 rem_attr:
 652         for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr)
 653                 sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
 654
 655         kobject_put(bat_priv->mesh_obj);
 656         bat_priv->mesh_obj = NULL;
 657 out:
 658         return -ENOMEM;
 659 }
 660
 661 void batadv_sysfs_del_meshif(struct net_device *dev)
 662 {
 663         struct batadv_priv *bat_priv = netdev_priv(dev);
 664         struct batadv_attribute **bat_attr;
 665
 666         for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr)
 667                 sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
 668
 669         kobject_put(bat_priv->mesh_obj);
 670         bat_priv->mesh_obj = NULL;
 671 }
 672
 673 /**
 674  * batadv_sysfs_add_vlan - add all the needed sysfs objects for the new vlan
 675  * @dev: netdev of the mesh interface
 676  * @vlan: private data of the newly added VLAN interface
 677  *
 678  * Returns 0 on success and -ENOMEM if any of the structure allocations fails.
 679  */
 680 int batadv_sysfs_add_vlan(struct net_device *dev,
 681                           struct batadv_softif_vlan *vlan)
 682 {
 683         char vlan_subdir[sizeof(BATADV_SYSFS_VLAN_SUBDIR_PREFIX) + 5];
 684         struct batadv_priv *bat_priv = netdev_priv(dev);
 685         struct batadv_attribute **bat_attr;
 686         int err;
 687
 688         if (vlan->vid & BATADV_VLAN_HAS_TAG) {
 689                 sprintf(vlan_subdir, BATADV_SYSFS_VLAN_SUBDIR_PREFIX "%hu",
 690                         vlan->vid & VLAN_VID_MASK);
 691
 692                 vlan->kobj = kobject_create_and_add(vlan_subdir,
 693                                                     bat_priv->mesh_obj);
 694                 if (!vlan->kobj) {
 695                         batadv_err(dev, "Can't add sysfs directory: %s/%s\n",
 696                                    dev->name, vlan_subdir);
 697                         goto out;
 698                 }
 699         } else {
 700                 /* the untagged LAN uses the root folder to store its "VLAN
 701                  * specific attributes"
 702                  */
 703                 vlan->kobj = bat_priv->mesh_obj;
 704                 kobject_get(bat_priv->mesh_obj);
 705         }
 706
 707         for (bat_attr = batadv_vlan_attrs; *bat_attr; ++bat_attr) {
 708                 err = sysfs_create_file(vlan->kobj,
 709                                         &((*bat_attr)->attr));
 710                 if (err) {
 711                         batadv_err(dev, "Can't add sysfs file: %s/%s/%s\n",
 712                                    dev->name, vlan_subdir,
 713                                    ((*bat_attr)->attr).name);
 714                         goto rem_attr;
 715                 }
 716         }
 717
 718         return 0;
 719
 720 rem_attr:
 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 out:
 727         return -ENOMEM;
 728 }
 729
 730 /**
 731  * batadv_sysfs_del_vlan - remove all the sysfs objects for a given VLAN
 732  * @bat_priv: the bat priv with all the soft interface information
 733  * @vlan: the private data of the VLAN to destroy
 734  */
 735 void batadv_sysfs_del_vlan(struct batadv_priv *bat_priv,
 736                            struct batadv_softif_vlan *vlan)
 737 {
 738         struct batadv_attribute **bat_attr;
 739
 740         for (bat_attr = batadv_vlan_attrs; *bat_attr; ++bat_attr)
 741                 sysfs_remove_file(vlan->kobj, &((*bat_attr)->attr));
 742
 743         kobject_put(vlan->kobj);
 744         vlan->kobj = NULL;
 745 }
 746
 747 static ssize_t batadv_show_mesh_iface(struct kobject *kobj,
 748                                       struct attribute *attr, char *buff)
 749 {
 750         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 751         struct batadv_hard_iface *hard_iface;
 752         ssize_t length;
 753         const char *ifname;
 754
 755         hard_iface = batadv_hardif_get_by_netdev(net_dev);
 756         if (!hard_iface)
 757                 return 0;
 758
 759         if (hard_iface->if_status == BATADV_IF_NOT_IN_USE)
 760                 ifname =  "none";
 761         else
 762                 ifname = hard_iface->soft_iface->name;
 763
 764         length = sprintf(buff, "%s\n", ifname);
 765
 766         batadv_hardif_free_ref(hard_iface);
 767
 768         return length;
 769 }
 770
 771 static ssize_t batadv_store_mesh_iface(struct kobject *kobj,
 772                                        struct attribute *attr, char *buff,
 773                                        size_t count)
 774 {
 775         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 776         struct batadv_hard_iface *hard_iface;
 777         int status_tmp = -1;
 778         int ret = count;
 779
 780         hard_iface = batadv_hardif_get_by_netdev(net_dev);
 781         if (!hard_iface)
 782                 return count;
 783
 784         if (buff[count - 1] == '\n')
 785                 buff[count - 1] = '\0';
 786
 787         if (strlen(buff) >= IFNAMSIZ) {
 788                 pr_err("Invalid parameter for 'mesh_iface' setting received: interface name too long '%s'\n",
 789                        buff);
 790                 batadv_hardif_free_ref(hard_iface);
 791                 return -EINVAL;
 792         }
 793
 794         if (strncmp(buff, "none", 4) == 0)
 795                 status_tmp = BATADV_IF_NOT_IN_USE;
 796         else
 797                 status_tmp = BATADV_IF_I_WANT_YOU;
 798
 799         if (hard_iface->if_status == status_tmp)
 800                 goto out;
 801
 802         if ((hard_iface->soft_iface) &&
 803             (strncmp(hard_iface->soft_iface->name, buff, IFNAMSIZ) == 0))
 804                 goto out;
 805
 806         rtnl_lock();
 807
 808         if (status_tmp == BATADV_IF_NOT_IN_USE) {
 809                 batadv_hardif_disable_interface(hard_iface,
 810                                                 BATADV_IF_CLEANUP_AUTO);
 811                 goto unlock;
 812         }
 813
 814         /* if the interface already is in use */
 815         if (hard_iface->if_status != BATADV_IF_NOT_IN_USE)
 816                 batadv_hardif_disable_interface(hard_iface,
 817                                                 BATADV_IF_CLEANUP_AUTO);
 818
 819         ret = batadv_hardif_enable_interface(hard_iface, buff);
 820
 821 unlock:
 822         rtnl_unlock();
 823 out:
 824         batadv_hardif_free_ref(hard_iface);
 825         return ret;
 826 }
 827
 828 static ssize_t batadv_show_iface_status(struct kobject *kobj,
 829                                         struct attribute *attr, char *buff)
 830 {
 831         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 832         struct batadv_hard_iface *hard_iface;
 833         ssize_t length;
 834
 835         hard_iface = batadv_hardif_get_by_netdev(net_dev);
 836         if (!hard_iface)
 837                 return 0;
 838
 839         switch (hard_iface->if_status) {
 840         case BATADV_IF_TO_BE_REMOVED:
 841                 length = sprintf(buff, "disabling\n");
 842                 break;
 843         case BATADV_IF_INACTIVE:
 844                 length = sprintf(buff, "inactive\n");
 845                 break;
 846         case BATADV_IF_ACTIVE:
 847                 length = sprintf(buff, "active\n");
 848                 break;
 849         case BATADV_IF_TO_BE_ACTIVATED:
 850                 length = sprintf(buff, "enabling\n");
 851                 break;
 852         case BATADV_IF_NOT_IN_USE:
 853         default:
 854                 length = sprintf(buff, "not in use\n");
 855                 break;
 856         }
 857
 858         batadv_hardif_free_ref(hard_iface);
 859
 860         return length;
 861 }
 862
 863 static BATADV_ATTR(mesh_iface, S_IRUGO | S_IWUSR, batadv_show_mesh_iface,
 864                    batadv_store_mesh_iface);
 865 static BATADV_ATTR(iface_status, S_IRUGO, batadv_show_iface_status, NULL);
 866
 867 static struct batadv_attribute *batadv_batman_attrs[] = {
 868         &batadv_attr_mesh_iface,
 869         &batadv_attr_iface_status,
 870         NULL,
 871 };
 872
 873 int batadv_sysfs_add_hardif(struct kobject **hardif_obj, struct net_device *dev)
 874 {
 875         struct kobject *hardif_kobject = &dev->dev.kobj;
 876         struct batadv_attribute **bat_attr;
 877         int err;
 878
 879         *hardif_obj = kobject_create_and_add(BATADV_SYSFS_IF_BAT_SUBDIR,
 880                                              hardif_kobject);
 881
 882         if (!*hardif_obj) {
 883                 batadv_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
 884                            BATADV_SYSFS_IF_BAT_SUBDIR);
 885                 goto out;
 886         }
 887
 888         for (bat_attr = batadv_batman_attrs; *bat_attr; ++bat_attr) {
 889                 err = sysfs_create_file(*hardif_obj, &((*bat_attr)->attr));
 890                 if (err) {
 891                         batadv_err(dev, "Can't add sysfs file: %s/%s/%s\n",
 892                                    dev->name, BATADV_SYSFS_IF_BAT_SUBDIR,
 893                                    ((*bat_attr)->attr).name);
 894                         goto rem_attr;
 895                 }
 896         }
 897
 898         return 0;
 899
 900 rem_attr:
 901         for (bat_attr = batadv_batman_attrs; *bat_attr; ++bat_attr)
 902                 sysfs_remove_file(*hardif_obj, &((*bat_attr)->attr));
 903 out:
 904         return -ENOMEM;
 905 }
 906
 907 void batadv_sysfs_del_hardif(struct kobject **hardif_obj)
 908 {
 909         kobject_put(*hardif_obj);
 910         *hardif_obj = NULL;
 911 }
 912
 913 int batadv_throw_uevent(struct batadv_priv *bat_priv, enum batadv_uev_type type,
 914                         enum batadv_uev_action action, const char *data)
 915 {
 916         int ret = -ENOMEM;
 917         struct kobject *bat_kobj;
 918         char *uevent_env[4] = { NULL, NULL, NULL, NULL };
 919
 920         bat_kobj = &bat_priv->soft_iface->dev.kobj;
 921
 922         uevent_env[0] = kasprintf(GFP_ATOMIC,
 923                                   "%s%s", BATADV_UEV_TYPE_VAR,
 924                                   batadv_uev_type_str[type]);
 925         if (!uevent_env[0])
 926                 goto out;
 927
 928         uevent_env[1] = kasprintf(GFP_ATOMIC,
 929                                   "%s%s", BATADV_UEV_ACTION_VAR,
 930                                   batadv_uev_action_str[action]);
 931         if (!uevent_env[1])
 932                 goto out;
 933
 934         /* If the event is DEL, ignore the data field */
 935         if (action != BATADV_UEV_DEL) {
 936                 uevent_env[2] = kasprintf(GFP_ATOMIC,
 937                                           "%s%s", BATADV_UEV_DATA_VAR, data);
 938                 if (!uevent_env[2])
 939                         goto out;
 940         }
 941
 942         ret = kobject_uevent_env(bat_kobj, KOBJ_CHANGE, uevent_env);
 943 out:
 944         kfree(uevent_env[0]);
 945         kfree(uevent_env[1]);
 946         kfree(uevent_env[2]);
 947
 948         if (ret)
 949                 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
 950                            "Impossible to send uevent for (%s,%s,%s) event (err: %d)\n",
 951                            batadv_uev_type_str[type],
 952                            batadv_uev_action_str[action],
 953                            (action == BATADV_UEV_DEL ? "NULL" : data), ret);
 954         return ret;
 955 }