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linux/net/batman-adv/sysfs.c
Sven Eckelmann 7a79d717e0 batman-adv: Update copyright years for 2019 
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
2019-01-04 11:04:24 +01:00

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// SPDX-License-Identifier: GPL-2.0
/* Copyright (C) 2010-2019 B.A.T.M.A.N. contributors:
*
* Marek Lindner
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public
* License as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "sysfs.h"
#include "main.h"
#include <linux/atomic.h>
#include <linux/compiler.h>
#include <linux/device.h>
#include <linux/errno.h>
#include <linux/gfp.h>
#include <linux/if.h>
#include <linux/if_vlan.h>
#include <linux/kernel.h>
#include <linux/kobject.h>
#include <linux/kref.h>
#include <linux/netdevice.h>
#include <linux/printk.h>
#include <linux/rculist.h>
#include <linux/rcupdate.h>
#include <linux/rtnetlink.h>
#include <linux/slab.h>
#include <linux/stddef.h>
#include <linux/string.h>
#include <linux/stringify.h>
#include <linux/workqueue.h>
#include <uapi/linux/batadv_packet.h>
#include "bridge_loop_avoidance.h"
#include "distributed-arp-table.h"
#include "gateway_client.h"
#include "gateway_common.h"
#include "hard-interface.h"
#include "log.h"
#include "network-coding.h"
#include "soft-interface.h"
static struct net_device *batadv_kobj_to_netdev(struct kobject *obj)
{
struct device *dev = container_of(obj->parent, struct device, kobj);
return to_net_dev(dev);
}
static struct batadv_priv *batadv_kobj_to_batpriv(struct kobject *obj)
{
struct net_device *net_dev = batadv_kobj_to_netdev(obj);
return netdev_priv(net_dev);
}
/**
* batadv_vlan_kobj_to_batpriv() - convert a vlan kobj in the associated batpriv
* @obj: kobject to covert
*
* Return: the associated batadv_priv struct.
*/
static struct batadv_priv *batadv_vlan_kobj_to_batpriv(struct kobject *obj)
{
/* VLAN specific attributes are located in the root sysfs folder if they
* refer to the untagged VLAN..
*/
if (!strcmp(BATADV_SYSFS_IF_MESH_SUBDIR, obj->name))
return batadv_kobj_to_batpriv(obj);
/* ..while the attributes for the tagged vlans are located in
* the in the corresponding "vlan%VID" subfolder
*/
return batadv_kobj_to_batpriv(obj->parent);
}
/**
* batadv_kobj_to_vlan() - convert a kobj in the associated softif_vlan struct
* @bat_priv: the bat priv with all the soft interface information
* @obj: kobject to covert
*
* Return: the associated softif_vlan struct if found, NULL otherwise.
*/
static struct batadv_softif_vlan *
batadv_kobj_to_vlan(struct batadv_priv *bat_priv, struct kobject *obj)
{
struct batadv_softif_vlan *vlan_tmp, *vlan = NULL;
rcu_read_lock();
hlist_for_each_entry_rcu(vlan_tmp, &bat_priv->softif_vlan_list, list) {
if (vlan_tmp->kobj != obj)
continue;
if (!kref_get_unless_zero(&vlan_tmp->refcount))
continue;
vlan = vlan_tmp;
break;
}
rcu_read_unlock();
return vlan;
}
#define BATADV_UEV_TYPE_VAR "BATTYPE="
#define BATADV_UEV_ACTION_VAR "BATACTION="
#define BATADV_UEV_DATA_VAR "BATDATA="
static char *batadv_uev_action_str[] = {
"add",
"del",
"change",
"loopdetect",
};
static char *batadv_uev_type_str[] = {
"gw",
"bla",
};
/* Use this, if you have customized show and store functions for vlan attrs */
#define BATADV_ATTR_VLAN(_name, _mode, _show, _store) \
struct batadv_attribute batadv_attr_vlan_##_name = { \
.attr = {.name = __stringify(_name), \
.mode = _mode }, \
.show = _show, \
.store = _store, \
}
/* Use this, if you have customized show and store functions */
#define BATADV_ATTR(_name, _mode, _show, _store) \
struct batadv_attribute batadv_attr_##_name = { \
.attr = {.name = __stringify(_name), \
.mode = _mode }, \
.show = _show, \
.store = _store, \
}
#define BATADV_ATTR_SIF_STORE_BOOL(_name, _post_func) \
ssize_t batadv_store_##_name(struct kobject *kobj, \
struct attribute *attr, char *buff, \
size_t count) \
{ \
struct net_device *net_dev = batadv_kobj_to_netdev(kobj); \
struct batadv_priv *bat_priv = netdev_priv(net_dev); \
\
return __batadv_store_bool_attr(buff, count, _post_func, attr, \
&bat_priv->_name, net_dev); \
}
#define BATADV_ATTR_SIF_SHOW_BOOL(_name) \
ssize_t batadv_show_##_name(struct kobject *kobj, \
struct attribute *attr, char *buff) \
{ \
struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj); \
\
return sprintf(buff, "%s\n", \
atomic_read(&bat_priv->_name) == 0 ? \
"disabled" : "enabled"); \
} \
/* Use this, if you are going to turn a [name] in the soft-interface
* (bat_priv) on or off
*/
#define BATADV_ATTR_SIF_BOOL(_name, _mode, _post_func) \
static BATADV_ATTR_SIF_STORE_BOOL(_name, _post_func) \
static BATADV_ATTR_SIF_SHOW_BOOL(_name) \
static BATADV_ATTR(_name, _mode, batadv_show_##_name, \
batadv_store_##_name)
#define BATADV_ATTR_SIF_STORE_UINT(_name, _var, _min, _max, _post_func) \
ssize_t batadv_store_##_name(struct kobject *kobj, \
struct attribute *attr, char *buff, \
size_t count) \
{ \
struct net_device *net_dev = batadv_kobj_to_netdev(kobj); \
struct batadv_priv *bat_priv = netdev_priv(net_dev); \
\
return __batadv_store_uint_attr(buff, count, _min, _max, \
_post_func, attr, \
&bat_priv->_var, net_dev, \
NULL); \
}
#define BATADV_ATTR_SIF_SHOW_UINT(_name, _var) \
ssize_t batadv_show_##_name(struct kobject *kobj, \
struct attribute *attr, char *buff) \
{ \
struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj); \
\
return sprintf(buff, "%i\n", atomic_read(&bat_priv->_var)); \
} \
/* Use this, if you are going to set [name] in the soft-interface
* (bat_priv) to an unsigned integer value
*/
#define BATADV_ATTR_SIF_UINT(_name, _var, _mode, _min, _max, _post_func)\
static BATADV_ATTR_SIF_STORE_UINT(_name, _var, _min, _max, _post_func)\
static BATADV_ATTR_SIF_SHOW_UINT(_name, _var) \
static BATADV_ATTR(_name, _mode, batadv_show_##_name, \
batadv_store_##_name)
#define BATADV_ATTR_VLAN_STORE_BOOL(_name, _post_func) \
ssize_t batadv_store_vlan_##_name(struct kobject *kobj, \
struct attribute *attr, char *buff, \
size_t count) \
{ \
struct batadv_priv *bat_priv = batadv_vlan_kobj_to_batpriv(kobj);\
struct batadv_softif_vlan *vlan = batadv_kobj_to_vlan(bat_priv, \
kobj); \
size_t res = __batadv_store_bool_attr(buff, count, _post_func, \
attr, &vlan->_name, \
bat_priv->soft_iface); \
\
batadv_softif_vlan_put(vlan); \
return res; \
}
#define BATADV_ATTR_VLAN_SHOW_BOOL(_name) \
ssize_t batadv_show_vlan_##_name(struct kobject *kobj, \
struct attribute *attr, char *buff) \
{ \
struct batadv_priv *bat_priv = batadv_vlan_kobj_to_batpriv(kobj);\
struct batadv_softif_vlan *vlan = batadv_kobj_to_vlan(bat_priv, \
kobj); \
size_t res = sprintf(buff, "%s\n", \
atomic_read(&vlan->_name) == 0 ? \
"disabled" : "enabled"); \
\
batadv_softif_vlan_put(vlan); \
return res; \
}
/* Use this, if you are going to turn a [name] in the vlan struct on or off */
#define BATADV_ATTR_VLAN_BOOL(_name, _mode, _post_func) \
static BATADV_ATTR_VLAN_STORE_BOOL(_name, _post_func) \
static BATADV_ATTR_VLAN_SHOW_BOOL(_name) \
static BATADV_ATTR_VLAN(_name, _mode, batadv_show_vlan_##_name, \
batadv_store_vlan_##_name)
#define BATADV_ATTR_HIF_STORE_UINT(_name, _var, _min, _max, _post_func) \
ssize_t batadv_store_##_name(struct kobject *kobj, \
struct attribute *attr, char *buff, \
size_t count) \
{ \
struct net_device *net_dev = batadv_kobj_to_netdev(kobj); \
struct batadv_hard_iface *hard_iface; \
ssize_t length; \
\
hard_iface = batadv_hardif_get_by_netdev(net_dev); \
if (!hard_iface) \
return 0; \
\
length = __batadv_store_uint_attr(buff, count, _min, _max, \
_post_func, attr, \
&hard_iface->_var, \
hard_iface->soft_iface, \
net_dev); \
\
batadv_hardif_put(hard_iface); \
return length; \
}
#define BATADV_ATTR_HIF_SHOW_UINT(_name, _var) \
ssize_t batadv_show_##_name(struct kobject *kobj, \
struct attribute *attr, char *buff) \
{ \
struct net_device *net_dev = batadv_kobj_to_netdev(kobj); \
struct batadv_hard_iface *hard_iface; \
ssize_t length; \
\
hard_iface = batadv_hardif_get_by_netdev(net_dev); \
if (!hard_iface) \
return 0; \
\
length = sprintf(buff, "%i\n", atomic_read(&hard_iface->_var)); \
\
batadv_hardif_put(hard_iface); \
return length; \
}
/* Use this, if you are going to set [name] in hard_iface to an
* unsigned integer value
*/
#define BATADV_ATTR_HIF_UINT(_name, _var, _mode, _min, _max, _post_func)\
static BATADV_ATTR_HIF_STORE_UINT(_name, _var, _min, \
_max, _post_func) \
static BATADV_ATTR_HIF_SHOW_UINT(_name, _var) \
static BATADV_ATTR(_name, _mode, batadv_show_##_name, \
batadv_store_##_name)
static int batadv_store_bool_attr(char *buff, size_t count,
struct net_device *net_dev,
const char *attr_name, atomic_t *attr,
bool *changed)
{
int enabled = -1;
*changed = false;
if (buff[count - 1] == '\n')
buff[count - 1] = '\0';
if ((strncmp(buff, "1", 2) == 0) ||
(strncmp(buff, "enable", 7) == 0) ||
(strncmp(buff, "enabled", 8) == 0))
enabled = 1;
if ((strncmp(buff, "0", 2) == 0) ||
(strncmp(buff, "disable", 8) == 0) ||
(strncmp(buff, "disabled", 9) == 0))
enabled = 0;
if (enabled < 0) {
batadv_info(net_dev, "%s: Invalid parameter received: %s\n",
attr_name, buff);
return -EINVAL;
}
if (atomic_read(attr) == enabled)
return count;
batadv_info(net_dev, "%s: Changing from: %s to: %s\n", attr_name,
atomic_read(attr) == 1 ? "enabled" : "disabled",
enabled == 1 ? "enabled" : "disabled");
*changed = true;
atomic_set(attr, (unsigned int)enabled);
return count;
}
static inline ssize_t
__batadv_store_bool_attr(char *buff, size_t count,
void (*post_func)(struct net_device *),
struct attribute *attr,
atomic_t *attr_store, struct net_device *net_dev)
{
bool changed;
int ret;
ret = batadv_store_bool_attr(buff, count, net_dev, attr->name,
attr_store, &changed);
if (post_func && changed)
post_func(net_dev);
return ret;
}
static int batadv_store_uint_attr(const char *buff, size_t count,
struct net_device *net_dev,
struct net_device *slave_dev,
const char *attr_name,
unsigned int min, unsigned int max,
atomic_t *attr)
{
char ifname[IFNAMSIZ + 3] = "";
unsigned long uint_val;
int ret;
ret = kstrtoul(buff, 10, &uint_val);
if (ret) {
batadv_info(net_dev, "%s: Invalid parameter received: %s\n",
attr_name, buff);
return -EINVAL;
}
if (uint_val < min) {
batadv_info(net_dev, "%s: Value is too small: %lu min: %u\n",
attr_name, uint_val, min);
return -EINVAL;
}
if (uint_val > max) {
batadv_info(net_dev, "%s: Value is too big: %lu max: %u\n",
attr_name, uint_val, max);
return -EINVAL;
}
if (atomic_read(attr) == uint_val)
return count;
if (slave_dev)
snprintf(ifname, sizeof(ifname), "%s: ", slave_dev->name);
batadv_info(net_dev, "%s: %sChanging from: %i to: %lu\n",
attr_name, ifname, atomic_read(attr), uint_val);
atomic_set(attr, uint_val);
return count;
}
static ssize_t __batadv_store_uint_attr(const char *buff, size_t count,
int min, int max,
void (*post_func)(struct net_device *),
const struct attribute *attr,
atomic_t *attr_store,
struct net_device *net_dev,
struct net_device *slave_dev)
{
int ret;
ret = batadv_store_uint_attr(buff, count, net_dev, slave_dev,
attr->name, min, max, attr_store);
if (post_func && ret)
post_func(net_dev);
return ret;
}
static ssize_t batadv_show_bat_algo(struct kobject *kobj,
struct attribute *attr, char *buff)
{
struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
return sprintf(buff, "%s\n", bat_priv->algo_ops->name);
}
static void batadv_post_gw_reselect(struct net_device *net_dev)
{
struct batadv_priv *bat_priv = netdev_priv(net_dev);
batadv_gw_reselect(bat_priv);
}
static ssize_t batadv_show_gw_mode(struct kobject *kobj, struct attribute *attr,
char *buff)
{
struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
int bytes_written;
/* GW mode is not available if the routing algorithm in use does not
* implement the GW API
*/
if (!bat_priv->algo_ops->gw.get_best_gw_node ||
!bat_priv->algo_ops->gw.is_eligible)
return -ENOENT;
switch (atomic_read(&bat_priv->gw.mode)) {
case BATADV_GW_MODE_CLIENT:
bytes_written = sprintf(buff, "%s\n",
BATADV_GW_MODE_CLIENT_NAME);
break;
case BATADV_GW_MODE_SERVER:
bytes_written = sprintf(buff, "%s\n",
BATADV_GW_MODE_SERVER_NAME);
break;
default:
bytes_written = sprintf(buff, "%s\n",
BATADV_GW_MODE_OFF_NAME);
break;
}
return bytes_written;
}
static ssize_t batadv_store_gw_mode(struct kobject *kobj,
struct attribute *attr, char *buff,
size_t count)
{
struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
struct batadv_priv *bat_priv = netdev_priv(net_dev);
char *curr_gw_mode_str;
int gw_mode_tmp = -1;
/* toggling GW mode is allowed only if the routing algorithm in use
* provides the GW API
*/
if (!bat_priv->algo_ops->gw.get_best_gw_node ||
!bat_priv->algo_ops->gw.is_eligible)
return -EINVAL;
if (buff[count - 1] == '\n')
buff[count - 1] = '\0';
if (strncmp(buff, BATADV_GW_MODE_OFF_NAME,
strlen(BATADV_GW_MODE_OFF_NAME)) == 0)
gw_mode_tmp = BATADV_GW_MODE_OFF;
if (strncmp(buff, BATADV_GW_MODE_CLIENT_NAME,
strlen(BATADV_GW_MODE_CLIENT_NAME)) == 0)
gw_mode_tmp = BATADV_GW_MODE_CLIENT;
if (strncmp(buff, BATADV_GW_MODE_SERVER_NAME,
strlen(BATADV_GW_MODE_SERVER_NAME)) == 0)
gw_mode_tmp = BATADV_GW_MODE_SERVER;
if (gw_mode_tmp < 0) {
batadv_info(net_dev,
"Invalid parameter for 'gw mode' setting received: %s\n",
buff);
return -EINVAL;
}
if (atomic_read(&bat_priv->gw.mode) == gw_mode_tmp)
return count;
switch (atomic_read(&bat_priv->gw.mode)) {
case BATADV_GW_MODE_CLIENT:
curr_gw_mode_str = BATADV_GW_MODE_CLIENT_NAME;
break;
case BATADV_GW_MODE_SERVER:
curr_gw_mode_str = BATADV_GW_MODE_SERVER_NAME;
break;
default:
curr_gw_mode_str = BATADV_GW_MODE_OFF_NAME;
break;
}
batadv_info(net_dev, "Changing gw mode from: %s to: %s\n",
curr_gw_mode_str, buff);
/* Invoking batadv_gw_reselect() is not enough to really de-select the
* current GW. It will only instruct the gateway client code to perform
* a re-election the next time that this is needed.
*
* When gw client mode is being switched off the current GW must be
* de-selected explicitly otherwise no GW_ADD uevent is thrown on
* client mode re-activation. This is operation is performed in
* batadv_gw_check_client_stop().
*/
batadv_gw_reselect(bat_priv);
/* always call batadv_gw_check_client_stop() before changing the gateway
* state
*/
batadv_gw_check_client_stop(bat_priv);
atomic_set(&bat_priv->gw.mode, (unsigned int)gw_mode_tmp);
batadv_gw_tvlv_container_update(bat_priv);
return count;
}
static ssize_t batadv_show_gw_sel_class(struct kobject *kobj,
struct attribute *attr, char *buff)
{
struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
/* GW selection class is not available if the routing algorithm in use
* does not implement the GW API
*/
if (!bat_priv->algo_ops->gw.get_best_gw_node ||
!bat_priv->algo_ops->gw.is_eligible)
return -ENOENT;
if (bat_priv->algo_ops->gw.show_sel_class)
return bat_priv->algo_ops->gw.show_sel_class(bat_priv, buff);
return sprintf(buff, "%i\n", atomic_read(&bat_priv->gw.sel_class));
}
static ssize_t batadv_store_gw_sel_class(struct kobject *kobj,
struct attribute *attr, char *buff,
size_t count)
{
struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
/* setting the GW selection class is allowed only if the routing
* algorithm in use implements the GW API
*/
if (!bat_priv->algo_ops->gw.get_best_gw_node ||
!bat_priv->algo_ops->gw.is_eligible)
return -EINVAL;
if (buff[count - 1] == '\n')
buff[count - 1] = '\0';
if (bat_priv->algo_ops->gw.store_sel_class)
return bat_priv->algo_ops->gw.store_sel_class(bat_priv, buff,
count);
return __batadv_store_uint_attr(buff, count, 1, BATADV_TQ_MAX_VALUE,
batadv_post_gw_reselect, attr,
&bat_priv->gw.sel_class,
bat_priv->soft_iface, NULL);
}
static ssize_t batadv_show_gw_bwidth(struct kobject *kobj,
struct attribute *attr, char *buff)
{
struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
u32 down, up;
down = atomic_read(&bat_priv->gw.bandwidth_down);
up = atomic_read(&bat_priv->gw.bandwidth_up);
return sprintf(buff, "%u.%u/%u.%u MBit\n", down / 10,
down % 10, up / 10, up % 10);
}
static ssize_t batadv_store_gw_bwidth(struct kobject *kobj,
struct attribute *attr, char *buff,
size_t count)
{
struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
if (buff[count - 1] == '\n')
buff[count - 1] = '\0';
return batadv_gw_bandwidth_set(net_dev, buff, count);
}
/**
* batadv_show_isolation_mark() - print the current isolation mark/mask
* @kobj: kobject representing the private mesh sysfs directory
* @attr: the batman-adv attribute the user is interacting with
* @buff: the buffer that will contain the data to send back to the user
*
* Return: the number of bytes written into 'buff' on success or a negative
* error code in case of failure
*/
static ssize_t batadv_show_isolation_mark(struct kobject *kobj,
struct attribute *attr, char *buff)
{
struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
return sprintf(buff, "%#.8x/%#.8x\n", bat_priv->isolation_mark,
bat_priv->isolation_mark_mask);
}
/**
* batadv_store_isolation_mark() - parse and store the isolation mark/mask
* entered by the user
* @kobj: kobject representing the private mesh sysfs directory
* @attr: the batman-adv attribute the user is interacting with
* @buff: the buffer containing the user data
* @count: number of bytes in the buffer
*
* Return: 'count' on success or a negative error code in case of failure
*/
static ssize_t batadv_store_isolation_mark(struct kobject *kobj,
struct attribute *attr, char *buff,
size_t count)
{
struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
struct batadv_priv *bat_priv = netdev_priv(net_dev);
u32 mark, mask;
char *mask_ptr;
/* parse the mask if it has been specified, otherwise assume the mask is
* the biggest possible
*/
mask = 0xFFFFFFFF;
mask_ptr = strchr(buff, '/');
if (mask_ptr) {
*mask_ptr = '\0';
mask_ptr++;
/* the mask must be entered in hex base as it is going to be a
* bitmask and not a prefix length
*/
if (kstrtou32(mask_ptr, 16, &mask) < 0)
return -EINVAL;
}
/* the mark can be entered in any base */
if (kstrtou32(buff, 0, &mark) < 0)
return -EINVAL;
bat_priv->isolation_mark_mask = mask;
/* erase bits not covered by the mask */
bat_priv->isolation_mark = mark & bat_priv->isolation_mark_mask;
batadv_info(net_dev,
"New skb mark for extended isolation: %#.8x/%#.8x\n",
bat_priv->isolation_mark, bat_priv->isolation_mark_mask);
return count;
}
BATADV_ATTR_SIF_BOOL(aggregated_ogms, 0644, NULL);
BATADV_ATTR_SIF_BOOL(bonding, 0644, NULL);
#ifdef CONFIG_BATMAN_ADV_BLA
BATADV_ATTR_SIF_BOOL(bridge_loop_avoidance, 0644, batadv_bla_status_update);
#endif
#ifdef CONFIG_BATMAN_ADV_DAT
BATADV_ATTR_SIF_BOOL(distributed_arp_table, 0644, batadv_dat_status_update);
#endif
BATADV_ATTR_SIF_BOOL(fragmentation, 0644, batadv_update_min_mtu);
static BATADV_ATTR(routing_algo, 0444, batadv_show_bat_algo, NULL);
static BATADV_ATTR(gw_mode, 0644, batadv_show_gw_mode, batadv_store_gw_mode);
BATADV_ATTR_SIF_UINT(orig_interval, orig_interval, 0644, 2 * BATADV_JITTER,
INT_MAX, NULL);
BATADV_ATTR_SIF_UINT(hop_penalty, hop_penalty, 0644, 0, BATADV_TQ_MAX_VALUE,
NULL);
static BATADV_ATTR(gw_sel_class, 0644, batadv_show_gw_sel_class,
batadv_store_gw_sel_class);
static BATADV_ATTR(gw_bandwidth, 0644, batadv_show_gw_bwidth,
batadv_store_gw_bwidth);
#ifdef CONFIG_BATMAN_ADV_MCAST
BATADV_ATTR_SIF_BOOL(multicast_mode, 0644, NULL);
#endif
#ifdef CONFIG_BATMAN_ADV_DEBUG
BATADV_ATTR_SIF_UINT(log_level, log_level, 0644, 0, BATADV_DBG_ALL, NULL);
#endif
#ifdef CONFIG_BATMAN_ADV_NC
BATADV_ATTR_SIF_BOOL(network_coding, 0644, batadv_nc_status_update);
#endif
static BATADV_ATTR(isolation_mark, 0644, batadv_show_isolation_mark,
batadv_store_isolation_mark);
static struct batadv_attribute *batadv_mesh_attrs[] = {
&batadv_attr_aggregated_ogms,
&batadv_attr_bonding,
#ifdef CONFIG_BATMAN_ADV_BLA
&batadv_attr_bridge_loop_avoidance,
#endif
#ifdef CONFIG_BATMAN_ADV_DAT
&batadv_attr_distributed_arp_table,
#endif
#ifdef CONFIG_BATMAN_ADV_MCAST
&batadv_attr_multicast_mode,
#endif
&batadv_attr_fragmentation,
&batadv_attr_routing_algo,
&batadv_attr_gw_mode,
&batadv_attr_orig_interval,
&batadv_attr_hop_penalty,
&batadv_attr_gw_sel_class,
&batadv_attr_gw_bandwidth,
#ifdef CONFIG_BATMAN_ADV_DEBUG
&batadv_attr_log_level,
#endif
#ifdef CONFIG_BATMAN_ADV_NC
&batadv_attr_network_coding,
#endif
&batadv_attr_isolation_mark,
NULL,
};
BATADV_ATTR_VLAN_BOOL(ap_isolation, 0644, NULL);
/* array of vlan specific sysfs attributes */
static struct batadv_attribute *batadv_vlan_attrs[] = {
&batadv_attr_vlan_ap_isolation,
NULL,
};
/**
* batadv_sysfs_add_meshif() - Add soft interface specific sysfs entries
* @dev: netdev struct of the soft interface
*
* Return: 0 on success or negative error number in case of failure
*/
int batadv_sysfs_add_meshif(struct net_device *dev)
{
struct kobject *batif_kobject = &dev->dev.kobj;
struct batadv_priv *bat_priv = netdev_priv(dev);
struct batadv_attribute **bat_attr;
int err;
bat_priv->mesh_obj = kobject_create_and_add(BATADV_SYSFS_IF_MESH_SUBDIR,
batif_kobject);
if (!bat_priv->mesh_obj) {
batadv_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
BATADV_SYSFS_IF_MESH_SUBDIR);
goto out;
}
for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr) {
err = sysfs_create_file(bat_priv->mesh_obj,
&((*bat_attr)->attr));
if (err) {
batadv_err(dev, "Can't add sysfs file: %s/%s/%s\n",
dev->name, BATADV_SYSFS_IF_MESH_SUBDIR,
((*bat_attr)->attr).name);
goto rem_attr;
}
}
return 0;
rem_attr:
for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr)
sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
kobject_uevent(bat_priv->mesh_obj, KOBJ_REMOVE);
kobject_del(bat_priv->mesh_obj);
kobject_put(bat_priv->mesh_obj);
bat_priv->mesh_obj = NULL;
out:
return -ENOMEM;
}
/**
* batadv_sysfs_del_meshif() - Remove soft interface specific sysfs entries
* @dev: netdev struct of the soft interface
*/
void batadv_sysfs_del_meshif(struct net_device *dev)
{
struct batadv_priv *bat_priv = netdev_priv(dev);
struct batadv_attribute **bat_attr;
for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr)
sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
kobject_uevent(bat_priv->mesh_obj, KOBJ_REMOVE);
kobject_del(bat_priv->mesh_obj);
kobject_put(bat_priv->mesh_obj);
bat_priv->mesh_obj = NULL;
}
/**
* batadv_sysfs_add_vlan() - add all the needed sysfs objects for the new vlan
* @dev: netdev of the mesh interface
* @vlan: private data of the newly added VLAN interface
*
* Return: 0 on success and -ENOMEM if any of the structure allocations fails.
*/
int batadv_sysfs_add_vlan(struct net_device *dev,
struct batadv_softif_vlan *vlan)
{
char vlan_subdir[sizeof(BATADV_SYSFS_VLAN_SUBDIR_PREFIX) + 5];
struct batadv_priv *bat_priv = netdev_priv(dev);
struct batadv_attribute **bat_attr;
int err;
if (vlan->vid & BATADV_VLAN_HAS_TAG) {
sprintf(vlan_subdir, BATADV_SYSFS_VLAN_SUBDIR_PREFIX "%hu",
vlan->vid & VLAN_VID_MASK);
vlan->kobj = kobject_create_and_add(vlan_subdir,
bat_priv->mesh_obj);
if (!vlan->kobj) {
batadv_err(dev, "Can't add sysfs directory: %s/%s\n",
dev->name, vlan_subdir);
goto out;
}
} else {
/* the untagged LAN uses the root folder to store its "VLAN
* specific attributes"
*/
vlan->kobj = bat_priv->mesh_obj;
kobject_get(bat_priv->mesh_obj);
}
for (bat_attr = batadv_vlan_attrs; *bat_attr; ++bat_attr) {
err = sysfs_create_file(vlan->kobj,
&((*bat_attr)->attr));
if (err) {
batadv_err(dev, "Can't add sysfs file: %s/%s/%s\n",
dev->name, vlan_subdir,
((*bat_attr)->attr).name);
goto rem_attr;
}
}
return 0;
rem_attr:
for (bat_attr = batadv_vlan_attrs; *bat_attr; ++bat_attr)
sysfs_remove_file(vlan->kobj, &((*bat_attr)->attr));
if (vlan->kobj != bat_priv->mesh_obj) {
kobject_uevent(vlan->kobj, KOBJ_REMOVE);
kobject_del(vlan->kobj);
}
kobject_put(vlan->kobj);
vlan->kobj = NULL;
out:
return -ENOMEM;
}
/**
* batadv_sysfs_del_vlan() - remove all the sysfs objects for a given VLAN
* @bat_priv: the bat priv with all the soft interface information
* @vlan: the private data of the VLAN to destroy
*/
void batadv_sysfs_del_vlan(struct batadv_priv *bat_priv,
struct batadv_softif_vlan *vlan)
{
struct batadv_attribute **bat_attr;
for (bat_attr = batadv_vlan_attrs; *bat_attr; ++bat_attr)
sysfs_remove_file(vlan->kobj, &((*bat_attr)->attr));
if (vlan->kobj != bat_priv->mesh_obj) {
kobject_uevent(vlan->kobj, KOBJ_REMOVE);
kobject_del(vlan->kobj);
}
kobject_put(vlan->kobj);
vlan->kobj = NULL;
}
static ssize_t batadv_show_mesh_iface(struct kobject *kobj,
struct attribute *attr, char *buff)
{
struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
struct batadv_hard_iface *hard_iface;
ssize_t length;
const char *ifname;
hard_iface = batadv_hardif_get_by_netdev(net_dev);
if (!hard_iface)
return 0;
if (hard_iface->if_status == BATADV_IF_NOT_IN_USE)
ifname = "none";
else
ifname = hard_iface->soft_iface->name;
length = sprintf(buff, "%s\n", ifname);
batadv_hardif_put(hard_iface);
return length;
}
/**
* batadv_store_mesh_iface_finish() - store new hardif mesh_iface state
* @net_dev: netdevice to add/remove to/from batman-adv soft-interface
* @ifname: name of soft-interface to modify
*
* Changes the parts of the hard+soft interface which can not be modified under
* sysfs lock (to prevent deadlock situations).
*
* Return: 0 on success, 0 < on failure
*/
static int batadv_store_mesh_iface_finish(struct net_device *net_dev,
char ifname[IFNAMSIZ])
{
struct net *net = dev_net(net_dev);
struct batadv_hard_iface *hard_iface;
int status_tmp;
int ret = 0;
ASSERT_RTNL();
hard_iface = batadv_hardif_get_by_netdev(net_dev);
if (!hard_iface)
return 0;
if (strncmp(ifname, "none", 4) == 0)
status_tmp = BATADV_IF_NOT_IN_USE;
else
status_tmp = BATADV_IF_I_WANT_YOU;
if (hard_iface->if_status == status_tmp)
goto out;
if (hard_iface->soft_iface &&
strncmp(hard_iface->soft_iface->name, ifname, IFNAMSIZ) == 0)
goto out;
if (status_tmp == BATADV_IF_NOT_IN_USE) {
batadv_hardif_disable_interface(hard_iface,
BATADV_IF_CLEANUP_AUTO);
goto out;
}
/* if the interface already is in use */
if (hard_iface->if_status != BATADV_IF_NOT_IN_USE)
batadv_hardif_disable_interface(hard_iface,
BATADV_IF_CLEANUP_AUTO);
ret = batadv_hardif_enable_interface(hard_iface, net, ifname);
out:
batadv_hardif_put(hard_iface);
return ret;
}
/**
* batadv_store_mesh_iface_work() - store new hardif mesh_iface state
* @work: work queue item
*
* Changes the parts of the hard+soft interface which can not be modified under
* sysfs lock (to prevent deadlock situations).
*/
static void batadv_store_mesh_iface_work(struct work_struct *work)
{
struct batadv_store_mesh_work *store_work;
int ret;
store_work = container_of(work, struct batadv_store_mesh_work, work);
rtnl_lock();
ret = batadv_store_mesh_iface_finish(store_work->net_dev,
store_work->soft_iface_name);
rtnl_unlock();
if (ret < 0)
pr_err("Failed to store new mesh_iface state %s for %s: %d\n",
store_work->soft_iface_name, store_work->net_dev->name,
ret);
dev_put(store_work->net_dev);
kfree(store_work);
}
static ssize_t batadv_store_mesh_iface(struct kobject *kobj,
struct attribute *attr, char *buff,
size_t count)
{
struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
struct batadv_store_mesh_work *store_work;
if (buff[count - 1] == '\n')
buff[count - 1] = '\0';
if (strlen(buff) >= IFNAMSIZ) {
pr_err("Invalid parameter for 'mesh_iface' setting received: interface name too long '%s'\n",
buff);
return -EINVAL;
}
store_work = kmalloc(sizeof(*store_work), GFP_KERNEL);
if (!store_work)
return -ENOMEM;
dev_hold(net_dev);
INIT_WORK(&store_work->work, batadv_store_mesh_iface_work);
store_work->net_dev = net_dev;
strlcpy(store_work->soft_iface_name, buff,
sizeof(store_work->soft_iface_name));
queue_work(batadv_event_workqueue, &store_work->work);
return count;
}
static ssize_t batadv_show_iface_status(struct kobject *kobj,
struct attribute *attr, char *buff)
{
struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
struct batadv_hard_iface *hard_iface;
ssize_t length;
hard_iface = batadv_hardif_get_by_netdev(net_dev);
if (!hard_iface)
return 0;
switch (hard_iface->if_status) {
case BATADV_IF_TO_BE_REMOVED:
length = sprintf(buff, "disabling\n");
break;
case BATADV_IF_INACTIVE:
length = sprintf(buff, "inactive\n");
break;
case BATADV_IF_ACTIVE:
length = sprintf(buff, "active\n");
break;
case BATADV_IF_TO_BE_ACTIVATED:
length = sprintf(buff, "enabling\n");
break;
case BATADV_IF_NOT_IN_USE:
default:
length = sprintf(buff, "not in use\n");
break;
}
batadv_hardif_put(hard_iface);
return length;
}
#ifdef CONFIG_BATMAN_ADV_BATMAN_V
/**
* batadv_store_throughput_override() - parse and store throughput override
* entered by the user
* @kobj: kobject representing the private mesh sysfs directory
* @attr: the batman-adv attribute the user is interacting with
* @buff: the buffer containing the user data
* @count: number of bytes in the buffer
*
* Return: 'count' on success or a negative error code in case of failure
*/
static ssize_t batadv_store_throughput_override(struct kobject *kobj,
struct attribute *attr,
char *buff, size_t count)
{
struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
struct batadv_hard_iface *hard_iface;
u32 tp_override;
u32 old_tp_override;
bool ret;
hard_iface = batadv_hardif_get_by_netdev(net_dev);
if (!hard_iface)
return -EINVAL;
if (buff[count - 1] == '\n')
buff[count - 1] = '\0';
ret = batadv_parse_throughput(net_dev, buff, "throughput_override",
&tp_override);
if (!ret)
return count;
old_tp_override = atomic_read(&hard_iface->bat_v.throughput_override);
if (old_tp_override == tp_override)
goto out;
batadv_info(hard_iface->soft_iface,
"%s: %s: Changing from: %u.%u MBit to: %u.%u MBit\n",
"throughput_override", net_dev->name,
old_tp_override / 10, old_tp_override % 10,
tp_override / 10, tp_override % 10);
atomic_set(&hard_iface->bat_v.throughput_override, tp_override);
out:
batadv_hardif_put(hard_iface);
return count;
}
static ssize_t batadv_show_throughput_override(struct kobject *kobj,
struct attribute *attr,
char *buff)
{
struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
struct batadv_hard_iface *hard_iface;
u32 tp_override;
hard_iface = batadv_hardif_get_by_netdev(net_dev);
if (!hard_iface)
return -EINVAL;
tp_override = atomic_read(&hard_iface->bat_v.throughput_override);
return sprintf(buff, "%u.%u MBit\n", tp_override / 10,
tp_override % 10);
}
#endif
static BATADV_ATTR(mesh_iface, 0644, batadv_show_mesh_iface,
batadv_store_mesh_iface);
static BATADV_ATTR(iface_status, 0444, batadv_show_iface_status, NULL);
#ifdef CONFIG_BATMAN_ADV_BATMAN_V
BATADV_ATTR_HIF_UINT(elp_interval, bat_v.elp_interval, 0644,
2 * BATADV_JITTER, INT_MAX, NULL);
static BATADV_ATTR(throughput_override, 0644, batadv_show_throughput_override,
batadv_store_throughput_override);
#endif
static struct batadv_attribute *batadv_batman_attrs[] = {
&batadv_attr_mesh_iface,
&batadv_attr_iface_status,
#ifdef CONFIG_BATMAN_ADV_BATMAN_V
&batadv_attr_elp_interval,
&batadv_attr_throughput_override,
#endif
NULL,
};
/**
* batadv_sysfs_add_hardif() - Add hard interface specific sysfs entries
* @hardif_obj: address where to store the pointer to new sysfs folder
* @dev: netdev struct of the hard interface
*
* Return: 0 on success or negative error number in case of failure
*/
int batadv_sysfs_add_hardif(struct kobject **hardif_obj, struct net_device *dev)
{
struct kobject *hardif_kobject = &dev->dev.kobj;
struct batadv_attribute **bat_attr;
int err;
*hardif_obj = kobject_create_and_add(BATADV_SYSFS_IF_BAT_SUBDIR,
hardif_kobject);
if (!*hardif_obj) {
batadv_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
BATADV_SYSFS_IF_BAT_SUBDIR);
goto out;
}
for (bat_attr = batadv_batman_attrs; *bat_attr; ++bat_attr) {
err = sysfs_create_file(*hardif_obj, &((*bat_attr)->attr));
if (err) {
batadv_err(dev, "Can't add sysfs file: %s/%s/%s\n",
dev->name, BATADV_SYSFS_IF_BAT_SUBDIR,
((*bat_attr)->attr).name);
goto rem_attr;
}
}
return 0;
rem_attr:
for (bat_attr = batadv_batman_attrs; *bat_attr; ++bat_attr)
sysfs_remove_file(*hardif_obj, &((*bat_attr)->attr));
out:
return -ENOMEM;
}
/**
* batadv_sysfs_del_hardif() - Remove hard interface specific sysfs entries
* @hardif_obj: address to the pointer to which stores batman-adv sysfs folder
* of the hard interface
*/
void batadv_sysfs_del_hardif(struct kobject **hardif_obj)
{
kobject_uevent(*hardif_obj, KOBJ_REMOVE);
kobject_del(*hardif_obj);
kobject_put(*hardif_obj);
*hardif_obj = NULL;
}
/**
* batadv_throw_uevent() - Send an uevent with batman-adv specific env data
* @bat_priv: the bat priv with all the soft interface information
* @type: subsystem type of event. Stored in uevent's BATTYPE
* @action: action type of event. Stored in uevent's BATACTION
* @data: string with additional information to the event (ignored for
* BATADV_UEV_DEL). Stored in uevent's BATDATA
*
* Return: 0 on success or negative error number in case of failure
*/
int batadv_throw_uevent(struct batadv_priv *bat_priv, enum batadv_uev_type type,
enum batadv_uev_action action, const char *data)
{
int ret = -ENOMEM;
struct kobject *bat_kobj;
char *uevent_env[4] = { NULL, NULL, NULL, NULL };
bat_kobj = &bat_priv->soft_iface->dev.kobj;
uevent_env[0] = kasprintf(GFP_ATOMIC,
"%s%s", BATADV_UEV_TYPE_VAR,
batadv_uev_type_str[type]);
if (!uevent_env[0])
goto out;
uevent_env[1] = kasprintf(GFP_ATOMIC,
"%s%s", BATADV_UEV_ACTION_VAR,
batadv_uev_action_str[action]);
if (!uevent_env[1])
goto out;
/* If the event is DEL, ignore the data field */
if (action != BATADV_UEV_DEL) {
uevent_env[2] = kasprintf(GFP_ATOMIC,
"%s%s", BATADV_UEV_DATA_VAR, data);
if (!uevent_env[2])
goto out;
}
ret = kobject_uevent_env(bat_kobj, KOBJ_CHANGE, uevent_env);
out:
kfree(uevent_env[0]);
kfree(uevent_env[1]);
kfree(uevent_env[2]);
if (ret)
batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
"Impossible to send uevent for (%s,%s,%s) event (err: %d)\n",
batadv_uev_type_str[type],
batadv_uev_action_str[action],
(action == BATADV_UEV_DEL ? "NULL" : data), ret);
return ret;
}
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