net/batman-adv/sysfs.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright (C) 2010-2019  B.A.T.M.A.N. contributors:
   3  *
   4  * Marek Lindner
   5  */
   6
   7 #include "sysfs.h"
   8 #include "main.h"
   9
  10 #include <asm/current.h>
  11 #include <linux/atomic.h>
  12 #include <linux/compiler.h>
  13 #include <linux/device.h>
  14 #include <linux/errno.h>
  15 #include <linux/gfp.h>
  16 #include <linux/if.h>
  17 #include <linux/if_vlan.h>
  18 #include <linux/kernel.h>
  19 #include <linux/kobject.h>
  20 #include <linux/kref.h>
  21 #include <linux/netdevice.h>
  22 #include <linux/printk.h>
  23 #include <linux/rculist.h>
  24 #include <linux/rcupdate.h>
  25 #include <linux/rtnetlink.h>
  26 #include <linux/sched.h>
  27 #include <linux/slab.h>
  28 #include <linux/stddef.h>
  29 #include <linux/string.h>
  30 #include <linux/stringify.h>
  31 #include <linux/workqueue.h>
  32 #include <uapi/linux/batadv_packet.h>
  33 #include <uapi/linux/batman_adv.h>
  34
  35 #include "bridge_loop_avoidance.h"
  36 #include "distributed-arp-table.h"
  37 #include "gateway_client.h"
  38 #include "gateway_common.h"
  39 #include "hard-interface.h"
  40 #include "log.h"
  41 #include "netlink.h"
  42 #include "network-coding.h"
  43 #include "soft-interface.h"
  44
  45 /**
  46  * batadv_sysfs_deprecated() - Log use of deprecated batadv sysfs access
  47  * @attr: attribute which was accessed
  48  */
  49 static void batadv_sysfs_deprecated(struct attribute *attr)
  50 {
  51         pr_warn_ratelimited(DEPRECATED "%s (pid %d) Use of sysfs file \"%s\".\nUse batadv genl family instead",
  52                             current->comm, task_pid_nr(current), attr->name);
  53 }
  54
  55 static struct net_device *batadv_kobj_to_netdev(struct kobject *obj)
  56 {
  57         struct device *dev = container_of(obj->parent, struct device, kobj);
  58
  59         return to_net_dev(dev);
  60 }
  61
  62 static struct batadv_priv *batadv_kobj_to_batpriv(struct kobject *obj)
  63 {
  64         struct net_device *net_dev = batadv_kobj_to_netdev(obj);
  65
  66         return netdev_priv(net_dev);
  67 }
  68
  69 /**
  70  * batadv_vlan_kobj_to_batpriv() - convert a vlan kobj in the associated batpriv
  71  * @obj: kobject to covert
  72  *
  73  * Return: the associated batadv_priv struct.
  74  */
  75 static struct batadv_priv *batadv_vlan_kobj_to_batpriv(struct kobject *obj)
  76 {
  77         /* VLAN specific attributes are located in the root sysfs folder if they
  78          * refer to the untagged VLAN..
  79          */
  80         if (!strcmp(BATADV_SYSFS_IF_MESH_SUBDIR, obj->name))
  81                 return batadv_kobj_to_batpriv(obj);
  82
  83         /* ..while the attributes for the tagged vlans are located in
  84          * the in the corresponding "vlan%VID" subfolder
  85          */
  86         return batadv_kobj_to_batpriv(obj->parent);
  87 }
  88
  89 /**
  90  * batadv_kobj_to_vlan() - convert a kobj in the associated softif_vlan struct
  91  * @bat_priv: the bat priv with all the soft interface information
  92  * @obj: kobject to covert
  93  *
  94  * Return: the associated softif_vlan struct if found, NULL otherwise.
  95  */
  96 static struct batadv_softif_vlan *
  97 batadv_kobj_to_vlan(struct batadv_priv *bat_priv, struct kobject *obj)
  98 {
  99         struct batadv_softif_vlan *vlan_tmp, *vlan = NULL;
 100
 101         rcu_read_lock();
 102         hlist_for_each_entry_rcu(vlan_tmp, &bat_priv->softif_vlan_list, list) {
 103                 if (vlan_tmp->kobj != obj)
 104                         continue;
 105
 106                 if (!kref_get_unless_zero(&vlan_tmp->refcount))
 107                         continue;
 108
 109                 vlan = vlan_tmp;
 110                 break;
 111         }
 112         rcu_read_unlock();
 113
 114         return vlan;
 115 }
 116
 117 /* Use this, if you have customized show and store functions for vlan attrs */
 118 #define BATADV_ATTR_VLAN(_name, _mode, _show, _store)   \
 119 struct batadv_attribute batadv_attr_vlan_##_name = {    \
 120         .attr = {.name = __stringify(_name),            \
 121                  .mode = _mode },                       \
 122         .show   = _show,                                \
 123         .store  = _store,                               \
 124 }
 125
 126 /* Use this, if you have customized show and store functions */
 127 #define BATADV_ATTR(_name, _mode, _show, _store)        \
 128 struct batadv_attribute batadv_attr_##_name = {         \
 129         .attr = {.name = __stringify(_name),            \
 130                  .mode = _mode },                       \
 131         .show   = _show,                                \
 132         .store  = _store,                               \
 133 }
 134
 135 #define BATADV_ATTR_SIF_STORE_BOOL(_name, _post_func)                   \
 136 ssize_t batadv_store_##_name(struct kobject *kobj,                      \
 137                              struct attribute *attr, char *buff,        \
 138                              size_t count)                              \
 139 {                                                                       \
 140         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);       \
 141         struct batadv_priv *bat_priv = netdev_priv(net_dev);            \
 142         ssize_t length;                                                 \
 143                                                                         \
 144         batadv_sysfs_deprecated(attr);                                  \
 145         length = __batadv_store_bool_attr(buff, count, _post_func, attr,\
 146                                           &bat_priv->_name, net_dev);   \
 147                                                                         \
 148         batadv_netlink_notify_mesh(bat_priv);                           \
 149                                                                         \
 150         return length;                                                  \
 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         batadv_sysfs_deprecated(attr);                                  \
 160         return sprintf(buff, "%s\n",                                    \
 161                        atomic_read(&bat_priv->_name) == 0 ?             \
 162                        "disabled" : "enabled");                         \
 163 }                                                                       \
 164
 165 /* Use this, if you are going to turn a [name] in the soft-interface
 166  * (bat_priv) on or off
 167  */
 168 #define BATADV_ATTR_SIF_BOOL(_name, _mode, _post_func)                  \
 169         static BATADV_ATTR_SIF_STORE_BOOL(_name, _post_func)            \
 170         static BATADV_ATTR_SIF_SHOW_BOOL(_name)                         \
 171         static BATADV_ATTR(_name, _mode, batadv_show_##_name,           \
 172                            batadv_store_##_name)
 173
 174 #define BATADV_ATTR_SIF_STORE_UINT(_name, _var, _min, _max, _post_func) \
 175 ssize_t batadv_store_##_name(struct kobject *kobj,                      \
 176                              struct attribute *attr, char *buff,        \
 177                              size_t count)                              \
 178 {                                                                       \
 179         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);       \
 180         struct batadv_priv *bat_priv = netdev_priv(net_dev);            \
 181         ssize_t length;                                                 \
 182                                                                         \
 183         batadv_sysfs_deprecated(attr);                                  \
 184         length = __batadv_store_uint_attr(buff, count, _min, _max,      \
 185                                           _post_func, attr,             \
 186                                           &bat_priv->_var, net_dev,     \
 187                                           NULL);                        \
 188                                                                         \
 189         batadv_netlink_notify_mesh(bat_priv);                           \
 190                                                                         \
 191         return length;                                                  \
 192 }
 193
 194 #define BATADV_ATTR_SIF_SHOW_UINT(_name, _var)                          \
 195 ssize_t batadv_show_##_name(struct kobject *kobj,                       \
 196                             struct attribute *attr, char *buff)         \
 197 {                                                                       \
 198         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);    \
 199                                                                         \
 200         batadv_sysfs_deprecated(attr);                                  \
 201         return sprintf(buff, "%i\n", atomic_read(&bat_priv->_var));     \
 202 }                                                                       \
 203
 204 /* Use this, if you are going to set [name] in the soft-interface
 205  * (bat_priv) to an unsigned integer value
 206  */
 207 #define BATADV_ATTR_SIF_UINT(_name, _var, _mode, _min, _max, _post_func)\
 208         static BATADV_ATTR_SIF_STORE_UINT(_name, _var, _min, _max, _post_func)\
 209         static BATADV_ATTR_SIF_SHOW_UINT(_name, _var)                   \
 210         static BATADV_ATTR(_name, _mode, batadv_show_##_name,           \
 211                            batadv_store_##_name)
 212
 213 #define BATADV_ATTR_VLAN_STORE_BOOL(_name, _post_func)                  \
 214 ssize_t batadv_store_vlan_##_name(struct kobject *kobj,                 \
 215                                   struct attribute *attr, char *buff,   \
 216                                   size_t count)                         \
 217 {                                                                       \
 218         struct batadv_priv *bat_priv = batadv_vlan_kobj_to_batpriv(kobj);\
 219         struct batadv_softif_vlan *vlan = batadv_kobj_to_vlan(bat_priv, \
 220                                                               kobj);    \
 221         size_t res = __batadv_store_bool_attr(buff, count, _post_func,  \
 222                                               attr, &vlan->_name,       \
 223                                               bat_priv->soft_iface);    \
 224                                                                         \
 225         batadv_sysfs_deprecated(attr);                                  \
 226         if (vlan->vid)                                                  \
 227                 batadv_netlink_notify_vlan(bat_priv, vlan);             \
 228         else                                                            \
 229                 batadv_netlink_notify_mesh(bat_priv);                   \
 230                                                                         \
 231         batadv_softif_vlan_put(vlan);                                   \
 232         return res;                                                     \
 233 }
 234
 235 #define BATADV_ATTR_VLAN_SHOW_BOOL(_name)                               \
 236 ssize_t batadv_show_vlan_##_name(struct kobject *kobj,                  \
 237                                  struct attribute *attr, char *buff)    \
 238 {                                                                       \
 239         struct batadv_priv *bat_priv = batadv_vlan_kobj_to_batpriv(kobj);\
 240         struct batadv_softif_vlan *vlan = batadv_kobj_to_vlan(bat_priv, \
 241                                                               kobj);    \
 242         size_t res = sprintf(buff, "%s\n",                              \
 243                              atomic_read(&vlan->_name) == 0 ?           \
 244                              "disabled" : "enabled");                   \
 245                                                                         \
 246         batadv_sysfs_deprecated(attr);                                  \
 247         batadv_softif_vlan_put(vlan);                                   \
 248         return res;                                                     \
 249 }
 250
 251 /* Use this, if you are going to turn a [name] in the vlan struct on or off */
 252 #define BATADV_ATTR_VLAN_BOOL(_name, _mode, _post_func)                 \
 253         static BATADV_ATTR_VLAN_STORE_BOOL(_name, _post_func)           \
 254         static BATADV_ATTR_VLAN_SHOW_BOOL(_name)                        \
 255         static BATADV_ATTR_VLAN(_name, _mode, batadv_show_vlan_##_name, \
 256                                 batadv_store_vlan_##_name)
 257
 258 #define BATADV_ATTR_HIF_STORE_UINT(_name, _var, _min, _max, _post_func) \
 259 ssize_t batadv_store_##_name(struct kobject *kobj,                      \
 260                              struct attribute *attr, char *buff,        \
 261                              size_t count)                              \
 262 {                                                                       \
 263         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);       \
 264         struct batadv_hard_iface *hard_iface;                           \
 265         struct batadv_priv *bat_priv;                                   \
 266         ssize_t length;                                                 \
 267                                                                         \
 268         batadv_sysfs_deprecated(attr);                                  \
 269         hard_iface = batadv_hardif_get_by_netdev(net_dev);              \
 270         if (!hard_iface)                                                \
 271                 return 0;                                               \
 272                                                                         \
 273         length = __batadv_store_uint_attr(buff, count, _min, _max,      \
 274                                           _post_func, attr,             \
 275                                           &hard_iface->_var,            \
 276                                           hard_iface->soft_iface,       \
 277                                           net_dev);                     \
 278                                                                         \
 279         if (hard_iface->soft_iface) {                                   \
 280                 bat_priv = netdev_priv(hard_iface->soft_iface);         \
 281                 batadv_netlink_notify_hardif(bat_priv, hard_iface);     \
 282         }                                                               \
 283                                                                         \
 284         batadv_hardif_put(hard_iface);                          \
 285         return length;                                                  \
 286 }
 287
 288 #define BATADV_ATTR_HIF_SHOW_UINT(_name, _var)                          \
 289 ssize_t batadv_show_##_name(struct kobject *kobj,                       \
 290                             struct attribute *attr, char *buff)         \
 291 {                                                                       \
 292         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);       \
 293         struct batadv_hard_iface *hard_iface;                           \
 294         ssize_t length;                                                 \
 295                                                                         \
 296         batadv_sysfs_deprecated(attr);                                  \
 297         hard_iface = batadv_hardif_get_by_netdev(net_dev);              \
 298         if (!hard_iface)                                                \
 299                 return 0;                                               \
 300                                                                         \
 301         length = sprintf(buff, "%i\n", atomic_read(&hard_iface->_var)); \
 302                                                                         \
 303         batadv_hardif_put(hard_iface);                          \
 304         return length;                                                  \
 305 }
 306
 307 /* Use this, if you are going to set [name] in hard_iface to an
 308  * unsigned integer value
 309  */
 310 #define BATADV_ATTR_HIF_UINT(_name, _var, _mode, _min, _max, _post_func)\
 311         static BATADV_ATTR_HIF_STORE_UINT(_name, _var, _min,            \
 312                                           _max, _post_func)             \
 313         static BATADV_ATTR_HIF_SHOW_UINT(_name, _var)                   \
 314         static BATADV_ATTR(_name, _mode, batadv_show_##_name,           \
 315                            batadv_store_##_name)
 316
 317 static int batadv_store_bool_attr(char *buff, size_t count,
 318                                   struct net_device *net_dev,
 319                                   const char *attr_name, atomic_t *attr,
 320                                   bool *changed)
 321 {
 322         int enabled = -1;
 323
 324         *changed = false;
 325
 326         if (buff[count - 1] == '\n')
 327                 buff[count - 1] = '\0';
 328
 329         if ((strncmp(buff, "1", 2) == 0) ||
 330             (strncmp(buff, "enable", 7) == 0) ||
 331             (strncmp(buff, "enabled", 8) == 0))
 332                 enabled = 1;
 333
 334         if ((strncmp(buff, "0", 2) == 0) ||
 335             (strncmp(buff, "disable", 8) == 0) ||
 336             (strncmp(buff, "disabled", 9) == 0))
 337                 enabled = 0;
 338
 339         if (enabled < 0) {
 340                 batadv_info(net_dev, "%s: Invalid parameter received: %s\n",
 341                             attr_name, buff);
 342                 return -EINVAL;
 343         }
 344
 345         if (atomic_read(attr) == enabled)
 346                 return count;
 347
 348         batadv_info(net_dev, "%s: Changing from: %s to: %s\n", attr_name,
 349                     atomic_read(attr) == 1 ? "enabled" : "disabled",
 350                     enabled == 1 ? "enabled" : "disabled");
 351
 352         *changed = true;
 353
 354         atomic_set(attr, (unsigned int)enabled);
 355         return count;
 356 }
 357
 358 static inline ssize_t
 359 __batadv_store_bool_attr(char *buff, size_t count,
 360                          void (*post_func)(struct net_device *),
 361                          struct attribute *attr,
 362                          atomic_t *attr_store, struct net_device *net_dev)
 363 {
 364         bool changed;
 365         int ret;
 366
 367         ret = batadv_store_bool_attr(buff, count, net_dev, attr->name,
 368                                      attr_store, &changed);
 369         if (post_func && changed)
 370                 post_func(net_dev);
 371
 372         return ret;
 373 }
 374
 375 static int batadv_store_uint_attr(const char *buff, size_t count,
 376                                   struct net_device *net_dev,
 377                                   struct net_device *slave_dev,
 378                                   const char *attr_name,
 379                                   unsigned int min, unsigned int max,
 380                                   atomic_t *attr)
 381 {
 382         char ifname[IFNAMSIZ + 3] = "";
 383         unsigned long uint_val;
 384         int ret;
 385
 386         ret = kstrtoul(buff, 10, &uint_val);
 387         if (ret) {
 388                 batadv_info(net_dev, "%s: Invalid parameter received: %s\n",
 389                             attr_name, buff);
 390                 return -EINVAL;
 391         }
 392
 393         if (uint_val < min) {
 394                 batadv_info(net_dev, "%s: Value is too small: %lu min: %u\n",
 395                             attr_name, uint_val, min);
 396                 return -EINVAL;
 397         }
 398
 399         if (uint_val > max) {
 400                 batadv_info(net_dev, "%s: Value is too big: %lu max: %u\n",
 401                             attr_name, uint_val, max);
 402                 return -EINVAL;
 403         }
 404
 405         if (atomic_read(attr) == uint_val)
 406                 return count;
 407
 408         if (slave_dev)
 409                 snprintf(ifname, sizeof(ifname), "%s: ", slave_dev->name);
 410
 411         batadv_info(net_dev, "%s: %sChanging from: %i to: %lu\n",
 412                     attr_name, ifname, atomic_read(attr), uint_val);
 413
 414         atomic_set(attr, uint_val);
 415         return count;
 416 }
 417
 418 static ssize_t __batadv_store_uint_attr(const char *buff, size_t count,
 419                                         int min, int max,
 420                                         void (*post_func)(struct net_device *),
 421                                         const struct attribute *attr,
 422                                         atomic_t *attr_store,
 423                                         struct net_device *net_dev,
 424                                         struct net_device *slave_dev)
 425 {
 426         int ret;
 427
 428         ret = batadv_store_uint_attr(buff, count, net_dev, slave_dev,
 429                                      attr->name, min, max, attr_store);
 430         if (post_func && ret)
 431                 post_func(net_dev);
 432
 433         return ret;
 434 }
 435
 436 static ssize_t batadv_show_bat_algo(struct kobject *kobj,
 437                                     struct attribute *attr, char *buff)
 438 {
 439         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 440
 441         batadv_sysfs_deprecated(attr);
 442         return sprintf(buff, "%s\n", bat_priv->algo_ops->name);
 443 }
 444
 445 static void batadv_post_gw_reselect(struct net_device *net_dev)
 446 {
 447         struct batadv_priv *bat_priv = netdev_priv(net_dev);
 448
 449         batadv_gw_reselect(bat_priv);
 450 }
 451
 452 static ssize_t batadv_show_gw_mode(struct kobject *kobj, struct attribute *attr,
 453                                    char *buff)
 454 {
 455         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 456         int bytes_written;
 457
 458         batadv_sysfs_deprecated(attr);
 459
 460         /* GW mode is not available if the routing algorithm in use does not
 461          * implement the GW API
 462          */
 463         if (!bat_priv->algo_ops->gw.get_best_gw_node ||
 464             !bat_priv->algo_ops->gw.is_eligible)
 465                 return -ENOENT;
 466
 467         switch (atomic_read(&bat_priv->gw.mode)) {
 468         case BATADV_GW_MODE_CLIENT:
 469                 bytes_written = sprintf(buff, "%s\n",
 470                                         BATADV_GW_MODE_CLIENT_NAME);
 471                 break;
 472         case BATADV_GW_MODE_SERVER:
 473                 bytes_written = sprintf(buff, "%s\n",
 474                                         BATADV_GW_MODE_SERVER_NAME);
 475                 break;
 476         default:
 477                 bytes_written = sprintf(buff, "%s\n",
 478                                         BATADV_GW_MODE_OFF_NAME);
 479                 break;
 480         }
 481
 482         return bytes_written;
 483 }
 484
 485 static ssize_t batadv_store_gw_mode(struct kobject *kobj,
 486                                     struct attribute *attr, char *buff,
 487                                     size_t count)
 488 {
 489         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 490         struct batadv_priv *bat_priv = netdev_priv(net_dev);
 491         char *curr_gw_mode_str;
 492         int gw_mode_tmp = -1;
 493
 494         batadv_sysfs_deprecated(attr);
 495
 496         /* toggling GW mode is allowed only if the routing algorithm in use
 497          * provides the GW API
 498          */
 499         if (!bat_priv->algo_ops->gw.get_best_gw_node ||
 500             !bat_priv->algo_ops->gw.is_eligible)
 501                 return -EINVAL;
 502
 503         if (buff[count - 1] == '\n')
 504                 buff[count - 1] = '\0';
 505
 506         if (strncmp(buff, BATADV_GW_MODE_OFF_NAME,
 507                     strlen(BATADV_GW_MODE_OFF_NAME)) == 0)
 508                 gw_mode_tmp = BATADV_GW_MODE_OFF;
 509
 510         if (strncmp(buff, BATADV_GW_MODE_CLIENT_NAME,
 511                     strlen(BATADV_GW_MODE_CLIENT_NAME)) == 0)
 512                 gw_mode_tmp = BATADV_GW_MODE_CLIENT;
 513
 514         if (strncmp(buff, BATADV_GW_MODE_SERVER_NAME,
 515                     strlen(BATADV_GW_MODE_SERVER_NAME)) == 0)
 516                 gw_mode_tmp = BATADV_GW_MODE_SERVER;
 517
 518         if (gw_mode_tmp < 0) {
 519                 batadv_info(net_dev,
 520                             "Invalid parameter for 'gw mode' setting received: %s\n",
 521                             buff);
 522                 return -EINVAL;
 523         }
 524
 525         if (atomic_read(&bat_priv->gw.mode) == gw_mode_tmp)
 526                 return count;
 527
 528         switch (atomic_read(&bat_priv->gw.mode)) {
 529         case BATADV_GW_MODE_CLIENT:
 530                 curr_gw_mode_str = BATADV_GW_MODE_CLIENT_NAME;
 531                 break;
 532         case BATADV_GW_MODE_SERVER:
 533                 curr_gw_mode_str = BATADV_GW_MODE_SERVER_NAME;
 534                 break;
 535         default:
 536                 curr_gw_mode_str = BATADV_GW_MODE_OFF_NAME;
 537                 break;
 538         }
 539
 540         batadv_info(net_dev, "Changing gw mode from: %s to: %s\n",
 541                     curr_gw_mode_str, buff);
 542
 543         /* Invoking batadv_gw_reselect() is not enough to really de-select the
 544          * current GW. It will only instruct the gateway client code to perform
 545          * a re-election the next time that this is needed.
 546          *
 547          * When gw client mode is being switched off the current GW must be
 548          * de-selected explicitly otherwise no GW_ADD uevent is thrown on
 549          * client mode re-activation. This is operation is performed in
 550          * batadv_gw_check_client_stop().
 551          */
 552         batadv_gw_reselect(bat_priv);
 553         /* always call batadv_gw_check_client_stop() before changing the gateway
 554          * state
 555          */
 556         batadv_gw_check_client_stop(bat_priv);
 557         atomic_set(&bat_priv->gw.mode, (unsigned int)gw_mode_tmp);
 558         batadv_gw_tvlv_container_update(bat_priv);
 559
 560         batadv_netlink_notify_mesh(bat_priv);
 561
 562         return count;
 563 }
 564
 565 static ssize_t batadv_show_gw_sel_class(struct kobject *kobj,
 566                                         struct attribute *attr, char *buff)
 567 {
 568         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 569
 570         batadv_sysfs_deprecated(attr);
 571
 572         /* GW selection class is not available if the routing algorithm in use
 573          * does not implement the GW API
 574          */
 575         if (!bat_priv->algo_ops->gw.get_best_gw_node ||
 576             !bat_priv->algo_ops->gw.is_eligible)
 577                 return -ENOENT;
 578
 579         if (bat_priv->algo_ops->gw.show_sel_class)
 580                 return bat_priv->algo_ops->gw.show_sel_class(bat_priv, buff);
 581
 582         return sprintf(buff, "%i\n", atomic_read(&bat_priv->gw.sel_class));
 583 }
 584
 585 static ssize_t batadv_store_gw_sel_class(struct kobject *kobj,
 586                                          struct attribute *attr, char *buff,
 587                                          size_t count)
 588 {
 589         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 590         ssize_t length;
 591
 592         batadv_sysfs_deprecated(attr);
 593
 594         /* setting the GW selection class is allowed only if the routing
 595          * algorithm in use implements the GW API
 596          */
 597         if (!bat_priv->algo_ops->gw.get_best_gw_node ||
 598             !bat_priv->algo_ops->gw.is_eligible)
 599                 return -EINVAL;
 600
 601         if (buff[count - 1] == '\n')
 602                 buff[count - 1] = '\0';
 603
 604         if (bat_priv->algo_ops->gw.store_sel_class)
 605                 return bat_priv->algo_ops->gw.store_sel_class(bat_priv, buff,
 606                                                               count);
 607
 608         length = __batadv_store_uint_attr(buff, count, 1, BATADV_TQ_MAX_VALUE,
 609                                           batadv_post_gw_reselect, attr,
 610                                           &bat_priv->gw.sel_class,
 611                                           bat_priv->soft_iface, NULL);
 612
 613         batadv_netlink_notify_mesh(bat_priv);
 614
 615         return length;
 616 }
 617
 618 static ssize_t batadv_show_gw_bwidth(struct kobject *kobj,
 619                                      struct attribute *attr, char *buff)
 620 {
 621         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 622         u32 down, up;
 623
 624         batadv_sysfs_deprecated(attr);
 625
 626         down = atomic_read(&bat_priv->gw.bandwidth_down);
 627         up = atomic_read(&bat_priv->gw.bandwidth_up);
 628
 629         return sprintf(buff, "%u.%u/%u.%u MBit\n", down / 10,
 630                        down % 10, up / 10, up % 10);
 631 }
 632
 633 static ssize_t batadv_store_gw_bwidth(struct kobject *kobj,
 634                                       struct attribute *attr, char *buff,
 635                                       size_t count)
 636 {
 637         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 638         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 639         ssize_t length;
 640
 641         batadv_sysfs_deprecated(attr);
 642
 643         if (buff[count - 1] == '\n')
 644                 buff[count - 1] = '\0';
 645
 646         length = batadv_gw_bandwidth_set(net_dev, buff, count);
 647
 648         batadv_netlink_notify_mesh(bat_priv);
 649
 650         return length;
 651 }
 652
 653 /**
 654  * batadv_show_isolation_mark() - print the current isolation mark/mask
 655  * @kobj: kobject representing the private mesh sysfs directory
 656  * @attr: the batman-adv attribute the user is interacting with
 657  * @buff: the buffer that will contain the data to send back to the user
 658  *
 659  * Return: the number of bytes written into 'buff' on success or a negative
 660  * error code in case of failure
 661  */
 662 static ssize_t batadv_show_isolation_mark(struct kobject *kobj,
 663                                           struct attribute *attr, char *buff)
 664 {
 665         struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
 666
 667         batadv_sysfs_deprecated(attr);
 668         return sprintf(buff, "%#.8x/%#.8x\n", bat_priv->isolation_mark,
 669                        bat_priv->isolation_mark_mask);
 670 }
 671
 672 /**
 673  * batadv_store_isolation_mark() - parse and store the isolation mark/mask
 674  *  entered by the user
 675  * @kobj: kobject representing the private mesh sysfs directory
 676  * @attr: the batman-adv attribute the user is interacting with
 677  * @buff: the buffer containing the user data
 678  * @count: number of bytes in the buffer
 679  *
 680  * Return: 'count' on success or a negative error code in case of failure
 681  */
 682 static ssize_t batadv_store_isolation_mark(struct kobject *kobj,
 683                                            struct attribute *attr, char *buff,
 684                                            size_t count)
 685 {
 686         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 687         struct batadv_priv *bat_priv = netdev_priv(net_dev);
 688         u32 mark, mask;
 689         char *mask_ptr;
 690
 691         batadv_sysfs_deprecated(attr);
 692
 693         /* parse the mask if it has been specified, otherwise assume the mask is
 694          * the biggest possible
 695          */
 696         mask = 0xFFFFFFFF;
 697         mask_ptr = strchr(buff, '/');
 698         if (mask_ptr) {
 699                 *mask_ptr = '\0';
 700                 mask_ptr++;
 701
 702                 /* the mask must be entered in hex base as it is going to be a
 703                  * bitmask and not a prefix length
 704                  */
 705                 if (kstrtou32(mask_ptr, 16, &mask) < 0)
 706                         return -EINVAL;
 707         }
 708
 709         /* the mark can be entered in any base */
 710         if (kstrtou32(buff, 0, &mark) < 0)
 711                 return -EINVAL;
 712
 713         bat_priv->isolation_mark_mask = mask;
 714         /* erase bits not covered by the mask */
 715         bat_priv->isolation_mark = mark & bat_priv->isolation_mark_mask;
 716
 717         batadv_info(net_dev,
 718                     "New skb mark for extended isolation: %#.8x/%#.8x\n",
 719                     bat_priv->isolation_mark, bat_priv->isolation_mark_mask);
 720
 721         batadv_netlink_notify_mesh(bat_priv);
 722
 723         return count;
 724 }
 725
 726 BATADV_ATTR_SIF_BOOL(aggregated_ogms, 0644, NULL);
 727 BATADV_ATTR_SIF_BOOL(bonding, 0644, NULL);
 728 #ifdef CONFIG_BATMAN_ADV_BLA
 729 BATADV_ATTR_SIF_BOOL(bridge_loop_avoidance, 0644, batadv_bla_status_update);
 730 #endif
 731 #ifdef CONFIG_BATMAN_ADV_DAT
 732 BATADV_ATTR_SIF_BOOL(distributed_arp_table, 0644, batadv_dat_status_update);
 733 #endif
 734 BATADV_ATTR_SIF_BOOL(fragmentation, 0644, batadv_update_min_mtu);
 735 static BATADV_ATTR(routing_algo, 0444, batadv_show_bat_algo, NULL);
 736 static BATADV_ATTR(gw_mode, 0644, batadv_show_gw_mode, batadv_store_gw_mode);
 737 BATADV_ATTR_SIF_UINT(orig_interval, orig_interval, 0644, 2 * BATADV_JITTER,
 738                      INT_MAX, NULL);
 739 BATADV_ATTR_SIF_UINT(hop_penalty, hop_penalty, 0644, 0, BATADV_TQ_MAX_VALUE,
 740                      NULL);
 741 static BATADV_ATTR(gw_sel_class, 0644, batadv_show_gw_sel_class,
 742                    batadv_store_gw_sel_class);
 743 static BATADV_ATTR(gw_bandwidth, 0644, batadv_show_gw_bwidth,
 744                    batadv_store_gw_bwidth);
 745 #ifdef CONFIG_BATMAN_ADV_MCAST
 746 BATADV_ATTR_SIF_BOOL(multicast_mode, 0644, NULL);
 747 #endif
 748 #ifdef CONFIG_BATMAN_ADV_DEBUG
 749 BATADV_ATTR_SIF_UINT(log_level, log_level, 0644, 0, BATADV_DBG_ALL, NULL);
 750 #endif
 751 #ifdef CONFIG_BATMAN_ADV_NC
 752 BATADV_ATTR_SIF_BOOL(network_coding, 0644, batadv_nc_status_update);
 753 #endif
 754 static BATADV_ATTR(isolation_mark, 0644, batadv_show_isolation_mark,
 755                    batadv_store_isolation_mark);
 756
 757 static struct batadv_attribute *batadv_mesh_attrs[] = {
 758         &batadv_attr_aggregated_ogms,
 759         &batadv_attr_bonding,
 760 #ifdef CONFIG_BATMAN_ADV_BLA
 761         &batadv_attr_bridge_loop_avoidance,
 762 #endif
 763 #ifdef CONFIG_BATMAN_ADV_DAT
 764         &batadv_attr_distributed_arp_table,
 765 #endif
 766 #ifdef CONFIG_BATMAN_ADV_MCAST
 767         &batadv_attr_multicast_mode,
 768 #endif
 769         &batadv_attr_fragmentation,
 770         &batadv_attr_routing_algo,
 771         &batadv_attr_gw_mode,
 772         &batadv_attr_orig_interval,
 773         &batadv_attr_hop_penalty,
 774         &batadv_attr_gw_sel_class,
 775         &batadv_attr_gw_bandwidth,
 776 #ifdef CONFIG_BATMAN_ADV_DEBUG
 777         &batadv_attr_log_level,
 778 #endif
 779 #ifdef CONFIG_BATMAN_ADV_NC
 780         &batadv_attr_network_coding,
 781 #endif
 782         &batadv_attr_isolation_mark,
 783         NULL,
 784 };
 785
 786 BATADV_ATTR_VLAN_BOOL(ap_isolation, 0644, NULL);
 787
 788 /* array of vlan specific sysfs attributes */
 789 static struct batadv_attribute *batadv_vlan_attrs[] = {
 790         &batadv_attr_vlan_ap_isolation,
 791         NULL,
 792 };
 793
 794 /**
 795  * batadv_sysfs_add_meshif() - Add soft interface specific sysfs entries
 796  * @dev: netdev struct of the soft interface
 797  *
 798  * Return: 0 on success or negative error number in case of failure
 799  */
 800 int batadv_sysfs_add_meshif(struct net_device *dev)
 801 {
 802         struct kobject *batif_kobject = &dev->dev.kobj;
 803         struct batadv_priv *bat_priv = netdev_priv(dev);
 804         struct batadv_attribute **bat_attr;
 805         int err;
 806
 807         bat_priv->mesh_obj = kobject_create_and_add(BATADV_SYSFS_IF_MESH_SUBDIR,
 808                                                     batif_kobject);
 809         if (!bat_priv->mesh_obj) {
 810                 batadv_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
 811                            BATADV_SYSFS_IF_MESH_SUBDIR);
 812                 goto out;
 813         }
 814
 815         for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr) {
 816                 err = sysfs_create_file(bat_priv->mesh_obj,
 817                                         &((*bat_attr)->attr));
 818                 if (err) {
 819                         batadv_err(dev, "Can't add sysfs file: %s/%s/%s\n",
 820                                    dev->name, BATADV_SYSFS_IF_MESH_SUBDIR,
 821                                    ((*bat_attr)->attr).name);
 822                         goto rem_attr;
 823                 }
 824         }
 825
 826         return 0;
 827
 828 rem_attr:
 829         for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr)
 830                 sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
 831
 832         kobject_uevent(bat_priv->mesh_obj, KOBJ_REMOVE);
 833         kobject_del(bat_priv->mesh_obj);
 834         kobject_put(bat_priv->mesh_obj);
 835         bat_priv->mesh_obj = NULL;
 836 out:
 837         return -ENOMEM;
 838 }
 839
 840 /**
 841  * batadv_sysfs_del_meshif() - Remove soft interface specific sysfs entries
 842  * @dev: netdev struct of the soft interface
 843  */
 844 void batadv_sysfs_del_meshif(struct net_device *dev)
 845 {
 846         struct batadv_priv *bat_priv = netdev_priv(dev);
 847         struct batadv_attribute **bat_attr;
 848
 849         for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr)
 850                 sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
 851
 852         kobject_uevent(bat_priv->mesh_obj, KOBJ_REMOVE);
 853         kobject_del(bat_priv->mesh_obj);
 854         kobject_put(bat_priv->mesh_obj);
 855         bat_priv->mesh_obj = NULL;
 856 }
 857
 858 /**
 859  * batadv_sysfs_add_vlan() - add all the needed sysfs objects for the new vlan
 860  * @dev: netdev of the mesh interface
 861  * @vlan: private data of the newly added VLAN interface
 862  *
 863  * Return: 0 on success and -ENOMEM if any of the structure allocations fails.
 864  */
 865 int batadv_sysfs_add_vlan(struct net_device *dev,
 866                           struct batadv_softif_vlan *vlan)
 867 {
 868         char vlan_subdir[sizeof(BATADV_SYSFS_VLAN_SUBDIR_PREFIX) + 5];
 869         struct batadv_priv *bat_priv = netdev_priv(dev);
 870         struct batadv_attribute **bat_attr;
 871         int err;
 872
 873         if (vlan->vid & BATADV_VLAN_HAS_TAG) {
 874                 sprintf(vlan_subdir, BATADV_SYSFS_VLAN_SUBDIR_PREFIX "%hu",
 875                         vlan->vid & VLAN_VID_MASK);
 876
 877                 vlan->kobj = kobject_create_and_add(vlan_subdir,
 878                                                     bat_priv->mesh_obj);
 879                 if (!vlan->kobj) {
 880                         batadv_err(dev, "Can't add sysfs directory: %s/%s\n",
 881                                    dev->name, vlan_subdir);
 882                         goto out;
 883                 }
 884         } else {
 885                 /* the untagged LAN uses the root folder to store its "VLAN
 886                  * specific attributes"
 887                  */
 888                 vlan->kobj = bat_priv->mesh_obj;
 889                 kobject_get(bat_priv->mesh_obj);
 890         }
 891
 892         for (bat_attr = batadv_vlan_attrs; *bat_attr; ++bat_attr) {
 893                 err = sysfs_create_file(vlan->kobj,
 894                                         &((*bat_attr)->attr));
 895                 if (err) {
 896                         batadv_err(dev, "Can't add sysfs file: %s/%s/%s\n",
 897                                    dev->name, vlan_subdir,
 898                                    ((*bat_attr)->attr).name);
 899                         goto rem_attr;
 900                 }
 901         }
 902
 903         return 0;
 904
 905 rem_attr:
 906         for (bat_attr = batadv_vlan_attrs; *bat_attr; ++bat_attr)
 907                 sysfs_remove_file(vlan->kobj, &((*bat_attr)->attr));
 908
 909         if (vlan->kobj != bat_priv->mesh_obj) {
 910                 kobject_uevent(vlan->kobj, KOBJ_REMOVE);
 911                 kobject_del(vlan->kobj);
 912         }
 913         kobject_put(vlan->kobj);
 914         vlan->kobj = NULL;
 915 out:
 916         return -ENOMEM;
 917 }
 918
 919 /**
 920  * batadv_sysfs_del_vlan() - remove all the sysfs objects for a given VLAN
 921  * @bat_priv: the bat priv with all the soft interface information
 922  * @vlan: the private data of the VLAN to destroy
 923  */
 924 void batadv_sysfs_del_vlan(struct batadv_priv *bat_priv,
 925                            struct batadv_softif_vlan *vlan)
 926 {
 927         struct batadv_attribute **bat_attr;
 928
 929         for (bat_attr = batadv_vlan_attrs; *bat_attr; ++bat_attr)
 930                 sysfs_remove_file(vlan->kobj, &((*bat_attr)->attr));
 931
 932         if (vlan->kobj != bat_priv->mesh_obj) {
 933                 kobject_uevent(vlan->kobj, KOBJ_REMOVE);
 934                 kobject_del(vlan->kobj);
 935         }
 936         kobject_put(vlan->kobj);
 937         vlan->kobj = NULL;
 938 }
 939
 940 static ssize_t batadv_show_mesh_iface(struct kobject *kobj,
 941                                       struct attribute *attr, char *buff)
 942 {
 943         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
 944         struct batadv_hard_iface *hard_iface;
 945         ssize_t length;
 946         const char *ifname;
 947
 948         batadv_sysfs_deprecated(attr);
 949
 950         hard_iface = batadv_hardif_get_by_netdev(net_dev);
 951         if (!hard_iface)
 952                 return 0;
 953
 954         if (hard_iface->if_status == BATADV_IF_NOT_IN_USE)
 955                 ifname =  "none";
 956         else
 957                 ifname = hard_iface->soft_iface->name;
 958
 959         length = sprintf(buff, "%s\n", ifname);
 960
 961         batadv_hardif_put(hard_iface);
 962
 963         return length;
 964 }
 965
 966 /**
 967  * batadv_store_mesh_iface_finish() - store new hardif mesh_iface state
 968  * @net_dev: netdevice to add/remove to/from batman-adv soft-interface
 969  * @ifname: name of soft-interface to modify
 970  *
 971  * Changes the parts of the hard+soft interface which can not be modified under
 972  * sysfs lock (to prevent deadlock situations).
 973  *
 974  * Return: 0 on success, 0 < on failure
 975  */
 976 static int batadv_store_mesh_iface_finish(struct net_device *net_dev,
 977                                           char ifname[IFNAMSIZ])
 978 {
 979         struct net *net = dev_net(net_dev);
 980         struct batadv_hard_iface *hard_iface;
 981         int status_tmp;
 982         int ret = 0;
 983
 984         ASSERT_RTNL();
 985
 986         hard_iface = batadv_hardif_get_by_netdev(net_dev);
 987         if (!hard_iface)
 988                 return 0;
 989
 990         if (strncmp(ifname, "none", 4) == 0)
 991                 status_tmp = BATADV_IF_NOT_IN_USE;
 992         else
 993                 status_tmp = BATADV_IF_I_WANT_YOU;
 994
 995         if (hard_iface->if_status == status_tmp)
 996                 goto out;
 997
 998         if (hard_iface->soft_iface &&
 999             strncmp(hard_iface->soft_iface->name, ifname, IFNAMSIZ) == 0)
1000                 goto out;
1001
1002         if (status_tmp == BATADV_IF_NOT_IN_USE) {
1003                 batadv_hardif_disable_interface(hard_iface,
1004                                                 BATADV_IF_CLEANUP_AUTO);
1005                 goto out;
1006         }
1007
1008         /* if the interface already is in use */
1009         if (hard_iface->if_status != BATADV_IF_NOT_IN_USE)
1010                 batadv_hardif_disable_interface(hard_iface,
1011                                                 BATADV_IF_CLEANUP_AUTO);
1012
1013         ret = batadv_hardif_enable_interface(hard_iface, net, ifname);
1014 out:
1015         batadv_hardif_put(hard_iface);
1016         return ret;
1017 }
1018
1019 /**
1020  * batadv_store_mesh_iface_work() - store new hardif mesh_iface state
1021  * @work: work queue item
1022  *
1023  * Changes the parts of the hard+soft interface which can not be modified under
1024  * sysfs lock (to prevent deadlock situations).
1025  */
1026 static void batadv_store_mesh_iface_work(struct work_struct *work)
1027 {
1028         struct batadv_store_mesh_work *store_work;
1029         int ret;
1030
1031         store_work = container_of(work, struct batadv_store_mesh_work, work);
1032
1033         rtnl_lock();
1034         ret = batadv_store_mesh_iface_finish(store_work->net_dev,
1035                                              store_work->soft_iface_name);
1036         rtnl_unlock();
1037
1038         if (ret < 0)
1039                 pr_err("Failed to store new mesh_iface state %s for %s: %d\n",
1040                        store_work->soft_iface_name, store_work->net_dev->name,
1041                        ret);
1042
1043         dev_put(store_work->net_dev);
1044         kfree(store_work);
1045 }
1046
1047 static ssize_t batadv_store_mesh_iface(struct kobject *kobj,
1048                                        struct attribute *attr, char *buff,
1049                                        size_t count)
1050 {
1051         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
1052         struct batadv_store_mesh_work *store_work;
1053
1054         batadv_sysfs_deprecated(attr);
1055
1056         if (buff[count - 1] == '\n')
1057                 buff[count - 1] = '\0';
1058
1059         if (strlen(buff) >= IFNAMSIZ) {
1060                 pr_err("Invalid parameter for 'mesh_iface' setting received: interface name too long '%s'\n",
1061                        buff);
1062                 return -EINVAL;
1063         }
1064
1065         store_work = kmalloc(sizeof(*store_work), GFP_KERNEL);
1066         if (!store_work)
1067                 return -ENOMEM;
1068
1069         dev_hold(net_dev);
1070         INIT_WORK(&store_work->work, batadv_store_mesh_iface_work);
1071         store_work->net_dev = net_dev;
1072         strlcpy(store_work->soft_iface_name, buff,
1073                 sizeof(store_work->soft_iface_name));
1074
1075         queue_work(batadv_event_workqueue, &store_work->work);
1076
1077         return count;
1078 }
1079
1080 static ssize_t batadv_show_iface_status(struct kobject *kobj,
1081                                         struct attribute *attr, char *buff)
1082 {
1083         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
1084         struct batadv_hard_iface *hard_iface;
1085         ssize_t length;
1086
1087         batadv_sysfs_deprecated(attr);
1088
1089         hard_iface = batadv_hardif_get_by_netdev(net_dev);
1090         if (!hard_iface)
1091                 return 0;
1092
1093         switch (hard_iface->if_status) {
1094         case BATADV_IF_TO_BE_REMOVED:
1095                 length = sprintf(buff, "disabling\n");
1096                 break;
1097         case BATADV_IF_INACTIVE:
1098                 length = sprintf(buff, "inactive\n");
1099                 break;
1100         case BATADV_IF_ACTIVE:
1101                 length = sprintf(buff, "active\n");
1102                 break;
1103         case BATADV_IF_TO_BE_ACTIVATED:
1104                 length = sprintf(buff, "enabling\n");
1105                 break;
1106         case BATADV_IF_NOT_IN_USE:
1107         default:
1108                 length = sprintf(buff, "not in use\n");
1109                 break;
1110         }
1111
1112         batadv_hardif_put(hard_iface);
1113
1114         return length;
1115 }
1116
1117 #ifdef CONFIG_BATMAN_ADV_BATMAN_V
1118
1119 /**
1120  * batadv_store_throughput_override() - parse and store throughput override
1121  *  entered by the user
1122  * @kobj: kobject representing the private mesh sysfs directory
1123  * @attr: the batman-adv attribute the user is interacting with
1124  * @buff: the buffer containing the user data
1125  * @count: number of bytes in the buffer
1126  *
1127  * Return: 'count' on success or a negative error code in case of failure
1128  */
1129 static ssize_t batadv_store_throughput_override(struct kobject *kobj,
1130                                                 struct attribute *attr,
1131                                                 char *buff, size_t count)
1132 {
1133         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
1134         struct batadv_hard_iface *hard_iface;
1135         struct batadv_priv *bat_priv;
1136         u32 tp_override;
1137         u32 old_tp_override;
1138         bool ret;
1139
1140         batadv_sysfs_deprecated(attr);
1141
1142         hard_iface = batadv_hardif_get_by_netdev(net_dev);
1143         if (!hard_iface)
1144                 return -EINVAL;
1145
1146         if (buff[count - 1] == '\n')
1147                 buff[count - 1] = '\0';
1148
1149         ret = batadv_parse_throughput(net_dev, buff, "throughput_override",
1150                                       &tp_override);
1151         if (!ret)
1152                 return count;
1153
1154         old_tp_override = atomic_read(&hard_iface->bat_v.throughput_override);
1155         if (old_tp_override == tp_override)
1156                 goto out;
1157
1158         batadv_info(hard_iface->soft_iface,
1159                     "%s: %s: Changing from: %u.%u MBit to: %u.%u MBit\n",
1160                     "throughput_override", net_dev->name,
1161                     old_tp_override / 10, old_tp_override % 10,
1162                     tp_override / 10, tp_override % 10);
1163
1164         atomic_set(&hard_iface->bat_v.throughput_override, tp_override);
1165
1166         if (hard_iface->soft_iface) {
1167                 bat_priv = netdev_priv(hard_iface->soft_iface);
1168                 batadv_netlink_notify_hardif(bat_priv, hard_iface);
1169         }
1170
1171 out:
1172         batadv_hardif_put(hard_iface);
1173         return count;
1174 }
1175
1176 static ssize_t batadv_show_throughput_override(struct kobject *kobj,
1177                                                struct attribute *attr,
1178                                                char *buff)
1179 {
1180         struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
1181         struct batadv_hard_iface *hard_iface;
1182         u32 tp_override;
1183
1184         batadv_sysfs_deprecated(attr);
1185
1186         hard_iface = batadv_hardif_get_by_netdev(net_dev);
1187         if (!hard_iface)
1188                 return -EINVAL;
1189
1190         tp_override = atomic_read(&hard_iface->bat_v.throughput_override);
1191
1192         return sprintf(buff, "%u.%u MBit\n", tp_override / 10,
1193                        tp_override % 10);
1194 }
1195
1196 #endif
1197
1198 static BATADV_ATTR(mesh_iface, 0644, batadv_show_mesh_iface,
1199                    batadv_store_mesh_iface);
1200 static BATADV_ATTR(iface_status, 0444, batadv_show_iface_status, NULL);
1201 #ifdef CONFIG_BATMAN_ADV_BATMAN_V
1202 BATADV_ATTR_HIF_UINT(elp_interval, bat_v.elp_interval, 0644,
1203                      2 * BATADV_JITTER, INT_MAX, NULL);
1204 static BATADV_ATTR(throughput_override, 0644, batadv_show_throughput_override,
1205                    batadv_store_throughput_override);
1206 #endif
1207
1208 static struct batadv_attribute *batadv_batman_attrs[] = {
1209         &batadv_attr_mesh_iface,
1210         &batadv_attr_iface_status,
1211 #ifdef CONFIG_BATMAN_ADV_BATMAN_V
1212         &batadv_attr_elp_interval,
1213         &batadv_attr_throughput_override,
1214 #endif
1215         NULL,
1216 };
1217
1218 /**
1219  * batadv_sysfs_add_hardif() - Add hard interface specific sysfs entries
1220  * @hardif_obj: address where to store the pointer to new sysfs folder
1221  * @dev: netdev struct of the hard interface
1222  *
1223  * Return: 0 on success or negative error number in case of failure
1224  */
1225 int batadv_sysfs_add_hardif(struct kobject **hardif_obj, struct net_device *dev)
1226 {
1227         struct kobject *hardif_kobject = &dev->dev.kobj;
1228         struct batadv_attribute **bat_attr;
1229         int err;
1230
1231         *hardif_obj = kobject_create_and_add(BATADV_SYSFS_IF_BAT_SUBDIR,
1232                                              hardif_kobject);
1233
1234         if (!*hardif_obj) {
1235                 batadv_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
1236                            BATADV_SYSFS_IF_BAT_SUBDIR);
1237                 goto out;
1238         }
1239
1240         for (bat_attr = batadv_batman_attrs; *bat_attr; ++bat_attr) {
1241                 err = sysfs_create_file(*hardif_obj, &((*bat_attr)->attr));
1242                 if (err) {
1243                         batadv_err(dev, "Can't add sysfs file: %s/%s/%s\n",
1244                                    dev->name, BATADV_SYSFS_IF_BAT_SUBDIR,
1245                                    ((*bat_attr)->attr).name);
1246                         goto rem_attr;
1247                 }
1248         }
1249
1250         return 0;
1251
1252 rem_attr:
1253         for (bat_attr = batadv_batman_attrs; *bat_attr; ++bat_attr)
1254                 sysfs_remove_file(*hardif_obj, &((*bat_attr)->attr));
1255 out:
1256         return -ENOMEM;
1257 }
1258
1259 /**
1260  * batadv_sysfs_del_hardif() - Remove hard interface specific sysfs entries
1261  * @hardif_obj: address to the pointer to which stores batman-adv sysfs folder
1262  *  of the hard interface
1263  */
1264 void batadv_sysfs_del_hardif(struct kobject **hardif_obj)
1265 {
1266         kobject_uevent(*hardif_obj, KOBJ_REMOVE);
1267         kobject_del(*hardif_obj);
1268         kobject_put(*hardif_obj);
1269         *hardif_obj = NULL;
1270 }