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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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a25bab9d72
The per hardif sysfs file "batman_adv/elp_interval" is using the generic
functions to store/show uint values. The helper __batadv_store_uint_attr
requires the softif net_device as parameter to print the resulting change
as info text when the users writes to this file. It uses the helper
function batadv_info to add it at the same time to the kernel ring buffer
and to the batman-adv debug log (when CONFIG_BATMAN_ADV_DEBUG is enabled).
The function batadv_info requires as first parameter the batman-adv softif
net_device. This parameter is then used to find the private buffer which
contains the debug log for this batman-adv interface. But
batadv_store_throughput_override used as first argument the slave
net_device. This slave device doesn't have the batadv_priv private data
which is access by batadv_info.
Writing to this file with CONFIG_BATMAN_ADV_DEBUG enabled can either lead
to a segfault or to memory corruption.
Fixes: 0744ff8fa8
("batman-adv: Add hard_iface specific sysfs wrapper macros for UINT")
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Acked-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
1262 lines
35 KiB
C
1262 lines
35 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (C) 2010-2018 B.A.T.M.A.N. contributors:
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*
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* Marek Lindner
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of version 2 of the GNU General Public
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* License as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "sysfs.h"
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#include "main.h"
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#include <linux/atomic.h>
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#include <linux/compiler.h>
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#include <linux/device.h>
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#include <linux/errno.h>
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#include <linux/gfp.h>
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#include <linux/if.h>
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#include <linux/if_vlan.h>
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#include <linux/kernel.h>
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#include <linux/kobject.h>
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#include <linux/kref.h>
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#include <linux/netdevice.h>
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#include <linux/printk.h>
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#include <linux/rculist.h>
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#include <linux/rcupdate.h>
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#include <linux/rtnetlink.h>
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#include <linux/slab.h>
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#include <linux/stddef.h>
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#include <linux/string.h>
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#include <linux/stringify.h>
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#include <linux/workqueue.h>
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#include <uapi/linux/batadv_packet.h>
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#include "bridge_loop_avoidance.h"
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#include "distributed-arp-table.h"
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#include "gateway_client.h"
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#include "gateway_common.h"
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#include "hard-interface.h"
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#include "log.h"
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#include "network-coding.h"
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#include "soft-interface.h"
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static struct net_device *batadv_kobj_to_netdev(struct kobject *obj)
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{
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struct device *dev = container_of(obj->parent, struct device, kobj);
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return to_net_dev(dev);
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}
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static struct batadv_priv *batadv_kobj_to_batpriv(struct kobject *obj)
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{
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struct net_device *net_dev = batadv_kobj_to_netdev(obj);
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return netdev_priv(net_dev);
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}
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/**
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* batadv_vlan_kobj_to_batpriv() - convert a vlan kobj in the associated batpriv
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* @obj: kobject to covert
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*
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* Return: the associated batadv_priv struct.
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*/
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static struct batadv_priv *batadv_vlan_kobj_to_batpriv(struct kobject *obj)
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{
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/* VLAN specific attributes are located in the root sysfs folder if they
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* refer to the untagged VLAN..
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*/
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if (!strcmp(BATADV_SYSFS_IF_MESH_SUBDIR, obj->name))
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return batadv_kobj_to_batpriv(obj);
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/* ..while the attributes for the tagged vlans are located in
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* the in the corresponding "vlan%VID" subfolder
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*/
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return batadv_kobj_to_batpriv(obj->parent);
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}
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/**
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* batadv_kobj_to_vlan() - convert a kobj in the associated softif_vlan struct
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* @bat_priv: the bat priv with all the soft interface information
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* @obj: kobject to covert
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*
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* Return: the associated softif_vlan struct if found, NULL otherwise.
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*/
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static struct batadv_softif_vlan *
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batadv_kobj_to_vlan(struct batadv_priv *bat_priv, struct kobject *obj)
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{
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struct batadv_softif_vlan *vlan_tmp, *vlan = NULL;
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rcu_read_lock();
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hlist_for_each_entry_rcu(vlan_tmp, &bat_priv->softif_vlan_list, list) {
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if (vlan_tmp->kobj != obj)
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continue;
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if (!kref_get_unless_zero(&vlan_tmp->refcount))
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continue;
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vlan = vlan_tmp;
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break;
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}
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rcu_read_unlock();
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return vlan;
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}
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#define BATADV_UEV_TYPE_VAR "BATTYPE="
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#define BATADV_UEV_ACTION_VAR "BATACTION="
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#define BATADV_UEV_DATA_VAR "BATDATA="
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static char *batadv_uev_action_str[] = {
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"add",
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"del",
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"change",
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"loopdetect",
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};
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static char *batadv_uev_type_str[] = {
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"gw",
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"bla",
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};
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/* Use this, if you have customized show and store functions for vlan attrs */
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#define BATADV_ATTR_VLAN(_name, _mode, _show, _store) \
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struct batadv_attribute batadv_attr_vlan_##_name = { \
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.attr = {.name = __stringify(_name), \
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.mode = _mode }, \
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.show = _show, \
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.store = _store, \
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}
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/* Use this, if you have customized show and store functions */
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#define BATADV_ATTR(_name, _mode, _show, _store) \
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struct batadv_attribute batadv_attr_##_name = { \
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.attr = {.name = __stringify(_name), \
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.mode = _mode }, \
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.show = _show, \
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.store = _store, \
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}
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#define BATADV_ATTR_SIF_STORE_BOOL(_name, _post_func) \
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ssize_t batadv_store_##_name(struct kobject *kobj, \
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struct attribute *attr, char *buff, \
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size_t count) \
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{ \
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struct net_device *net_dev = batadv_kobj_to_netdev(kobj); \
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struct batadv_priv *bat_priv = netdev_priv(net_dev); \
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\
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return __batadv_store_bool_attr(buff, count, _post_func, attr, \
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&bat_priv->_name, net_dev); \
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}
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#define BATADV_ATTR_SIF_SHOW_BOOL(_name) \
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ssize_t batadv_show_##_name(struct kobject *kobj, \
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struct attribute *attr, char *buff) \
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{ \
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struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj); \
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\
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return sprintf(buff, "%s\n", \
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atomic_read(&bat_priv->_name) == 0 ? \
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"disabled" : "enabled"); \
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} \
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/* Use this, if you are going to turn a [name] in the soft-interface
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* (bat_priv) on or off
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*/
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#define BATADV_ATTR_SIF_BOOL(_name, _mode, _post_func) \
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static BATADV_ATTR_SIF_STORE_BOOL(_name, _post_func) \
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static BATADV_ATTR_SIF_SHOW_BOOL(_name) \
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static BATADV_ATTR(_name, _mode, batadv_show_##_name, \
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batadv_store_##_name)
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#define BATADV_ATTR_SIF_STORE_UINT(_name, _var, _min, _max, _post_func) \
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ssize_t batadv_store_##_name(struct kobject *kobj, \
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struct attribute *attr, char *buff, \
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size_t count) \
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{ \
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struct net_device *net_dev = batadv_kobj_to_netdev(kobj); \
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struct batadv_priv *bat_priv = netdev_priv(net_dev); \
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\
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return __batadv_store_uint_attr(buff, count, _min, _max, \
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_post_func, attr, \
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&bat_priv->_var, net_dev, \
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NULL); \
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}
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#define BATADV_ATTR_SIF_SHOW_UINT(_name, _var) \
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ssize_t batadv_show_##_name(struct kobject *kobj, \
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struct attribute *attr, char *buff) \
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{ \
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struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj); \
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\
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return sprintf(buff, "%i\n", atomic_read(&bat_priv->_var)); \
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} \
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/* Use this, if you are going to set [name] in the soft-interface
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* (bat_priv) to an unsigned integer value
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*/
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#define BATADV_ATTR_SIF_UINT(_name, _var, _mode, _min, _max, _post_func)\
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static BATADV_ATTR_SIF_STORE_UINT(_name, _var, _min, _max, _post_func)\
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static BATADV_ATTR_SIF_SHOW_UINT(_name, _var) \
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static BATADV_ATTR(_name, _mode, batadv_show_##_name, \
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batadv_store_##_name)
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#define BATADV_ATTR_VLAN_STORE_BOOL(_name, _post_func) \
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ssize_t batadv_store_vlan_##_name(struct kobject *kobj, \
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struct attribute *attr, char *buff, \
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size_t count) \
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{ \
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struct batadv_priv *bat_priv = batadv_vlan_kobj_to_batpriv(kobj);\
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struct batadv_softif_vlan *vlan = batadv_kobj_to_vlan(bat_priv, \
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kobj); \
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size_t res = __batadv_store_bool_attr(buff, count, _post_func, \
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attr, &vlan->_name, \
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bat_priv->soft_iface); \
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\
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batadv_softif_vlan_put(vlan); \
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return res; \
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}
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#define BATADV_ATTR_VLAN_SHOW_BOOL(_name) \
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ssize_t batadv_show_vlan_##_name(struct kobject *kobj, \
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struct attribute *attr, char *buff) \
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{ \
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struct batadv_priv *bat_priv = batadv_vlan_kobj_to_batpriv(kobj);\
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struct batadv_softif_vlan *vlan = batadv_kobj_to_vlan(bat_priv, \
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kobj); \
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size_t res = sprintf(buff, "%s\n", \
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atomic_read(&vlan->_name) == 0 ? \
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"disabled" : "enabled"); \
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\
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batadv_softif_vlan_put(vlan); \
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return res; \
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}
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/* Use this, if you are going to turn a [name] in the vlan struct on or off */
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#define BATADV_ATTR_VLAN_BOOL(_name, _mode, _post_func) \
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static BATADV_ATTR_VLAN_STORE_BOOL(_name, _post_func) \
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static BATADV_ATTR_VLAN_SHOW_BOOL(_name) \
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static BATADV_ATTR_VLAN(_name, _mode, batadv_show_vlan_##_name, \
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batadv_store_vlan_##_name)
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#define BATADV_ATTR_HIF_STORE_UINT(_name, _var, _min, _max, _post_func) \
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ssize_t batadv_store_##_name(struct kobject *kobj, \
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struct attribute *attr, char *buff, \
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size_t count) \
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{ \
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struct net_device *net_dev = batadv_kobj_to_netdev(kobj); \
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struct batadv_hard_iface *hard_iface; \
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ssize_t length; \
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\
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hard_iface = batadv_hardif_get_by_netdev(net_dev); \
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if (!hard_iface) \
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return 0; \
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\
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length = __batadv_store_uint_attr(buff, count, _min, _max, \
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_post_func, attr, \
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&hard_iface->_var, \
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hard_iface->soft_iface, \
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net_dev); \
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\
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batadv_hardif_put(hard_iface); \
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return length; \
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}
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#define BATADV_ATTR_HIF_SHOW_UINT(_name, _var) \
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ssize_t batadv_show_##_name(struct kobject *kobj, \
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struct attribute *attr, char *buff) \
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{ \
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struct net_device *net_dev = batadv_kobj_to_netdev(kobj); \
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struct batadv_hard_iface *hard_iface; \
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ssize_t length; \
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\
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hard_iface = batadv_hardif_get_by_netdev(net_dev); \
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if (!hard_iface) \
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return 0; \
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\
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length = sprintf(buff, "%i\n", atomic_read(&hard_iface->_var)); \
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\
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batadv_hardif_put(hard_iface); \
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return length; \
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}
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/* Use this, if you are going to set [name] in hard_iface to an
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* unsigned integer value
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*/
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#define BATADV_ATTR_HIF_UINT(_name, _var, _mode, _min, _max, _post_func)\
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static BATADV_ATTR_HIF_STORE_UINT(_name, _var, _min, \
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_max, _post_func) \
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static BATADV_ATTR_HIF_SHOW_UINT(_name, _var) \
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static BATADV_ATTR(_name, _mode, batadv_show_##_name, \
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batadv_store_##_name)
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static int batadv_store_bool_attr(char *buff, size_t count,
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struct net_device *net_dev,
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const char *attr_name, atomic_t *attr,
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bool *changed)
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{
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int enabled = -1;
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*changed = false;
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if (buff[count - 1] == '\n')
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buff[count - 1] = '\0';
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if ((strncmp(buff, "1", 2) == 0) ||
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(strncmp(buff, "enable", 7) == 0) ||
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(strncmp(buff, "enabled", 8) == 0))
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enabled = 1;
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if ((strncmp(buff, "0", 2) == 0) ||
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(strncmp(buff, "disable", 8) == 0) ||
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(strncmp(buff, "disabled", 9) == 0))
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enabled = 0;
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if (enabled < 0) {
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batadv_info(net_dev, "%s: Invalid parameter received: %s\n",
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attr_name, buff);
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return -EINVAL;
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}
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if (atomic_read(attr) == enabled)
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return count;
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batadv_info(net_dev, "%s: Changing from: %s to: %s\n", attr_name,
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atomic_read(attr) == 1 ? "enabled" : "disabled",
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enabled == 1 ? "enabled" : "disabled");
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*changed = true;
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atomic_set(attr, (unsigned int)enabled);
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return count;
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}
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static inline ssize_t
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__batadv_store_bool_attr(char *buff, size_t count,
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void (*post_func)(struct net_device *),
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struct attribute *attr,
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atomic_t *attr_store, struct net_device *net_dev)
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{
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bool changed;
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int ret;
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ret = batadv_store_bool_attr(buff, count, net_dev, attr->name,
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attr_store, &changed);
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if (post_func && changed)
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post_func(net_dev);
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return ret;
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}
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static int batadv_store_uint_attr(const char *buff, size_t count,
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struct net_device *net_dev,
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struct net_device *slave_dev,
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const char *attr_name,
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unsigned int min, unsigned int max,
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atomic_t *attr)
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{
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char ifname[IFNAMSIZ + 3] = "";
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unsigned long uint_val;
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int ret;
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ret = kstrtoul(buff, 10, &uint_val);
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if (ret) {
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batadv_info(net_dev, "%s: Invalid parameter received: %s\n",
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attr_name, buff);
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return -EINVAL;
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}
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if (uint_val < min) {
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batadv_info(net_dev, "%s: Value is too small: %lu min: %u\n",
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attr_name, uint_val, min);
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return -EINVAL;
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}
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if (uint_val > max) {
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batadv_info(net_dev, "%s: Value is too big: %lu max: %u\n",
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attr_name, uint_val, max);
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return -EINVAL;
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}
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if (atomic_read(attr) == uint_val)
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return count;
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if (slave_dev)
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snprintf(ifname, sizeof(ifname), "%s: ", slave_dev->name);
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batadv_info(net_dev, "%s: %sChanging from: %i to: %lu\n",
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attr_name, ifname, atomic_read(attr), uint_val);
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atomic_set(attr, uint_val);
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return count;
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}
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static ssize_t __batadv_store_uint_attr(const char *buff, size_t count,
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int min, int max,
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void (*post_func)(struct net_device *),
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const struct attribute *attr,
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atomic_t *attr_store,
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struct net_device *net_dev,
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struct net_device *slave_dev)
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{
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int ret;
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ret = batadv_store_uint_attr(buff, count, net_dev, slave_dev,
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attr->name, min, max, attr_store);
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if (post_func && ret)
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post_func(net_dev);
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return ret;
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}
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static ssize_t batadv_show_bat_algo(struct kobject *kobj,
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struct attribute *attr, char *buff)
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{
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struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
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return sprintf(buff, "%s\n", bat_priv->algo_ops->name);
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}
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static void batadv_post_gw_reselect(struct net_device *net_dev)
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{
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struct batadv_priv *bat_priv = netdev_priv(net_dev);
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batadv_gw_reselect(bat_priv);
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}
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static ssize_t batadv_show_gw_mode(struct kobject *kobj, struct attribute *attr,
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char *buff)
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{
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struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
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int bytes_written;
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/* GW mode is not available if the routing algorithm in use does not
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* implement the GW API
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*/
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if (!bat_priv->algo_ops->gw.get_best_gw_node ||
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!bat_priv->algo_ops->gw.is_eligible)
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return -ENOENT;
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|
|
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;
|
|
}
|