linux-stable/net/batman-adv/debugfs.h
Sven Eckelmann 6da7be7d24 batman-adv: Fix debugfs path for renamed softif
batman-adv is creating special debugfs directories in the init
net_namespace for each created soft-interface (batadv net_device). But it
is possible to rename a net_device to a completely different name then the
original one.

It can therefore happen that a user registers a new batadv net_device with
the name "bat0". batman-adv is then also adding a new directory under
$debugfs/batman-adv/ with the name "wlan0".

The user then decides to rename this device to "bat1" and registers a
different batadv device with the name "bat0". batman-adv will then try to
create a directory with the name "bat0" under $debugfs/batman-adv/ again.
But there already exists one with this name under this path and thus this
fails. batman-adv will detect a problem and rollback the registering of
this device.

batman-adv must therefore take care of renaming the debugfs directories for
soft-interfaces whenever it detects such a net_device rename.

Fixes: c6c8fea297 ("net: Add batman-adv meshing protocol")
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
2018-06-23 10:29:33 +02:00

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C

/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (C) 2010-2018 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/>.
*/
#ifndef _NET_BATMAN_ADV_DEBUGFS_H_
#define _NET_BATMAN_ADV_DEBUGFS_H_
#include "main.h"
struct net_device;
#define BATADV_DEBUGFS_SUBDIR "batman_adv"
#if IS_ENABLED(CONFIG_BATMAN_ADV_DEBUGFS)
void batadv_debugfs_init(void);
void batadv_debugfs_destroy(void);
int batadv_debugfs_add_meshif(struct net_device *dev);
void batadv_debugfs_rename_meshif(struct net_device *dev);
void batadv_debugfs_del_meshif(struct net_device *dev);
int batadv_debugfs_add_hardif(struct batadv_hard_iface *hard_iface);
void batadv_debugfs_rename_hardif(struct batadv_hard_iface *hard_iface);
void batadv_debugfs_del_hardif(struct batadv_hard_iface *hard_iface);
#else
static inline void batadv_debugfs_init(void)
{
}
static inline void batadv_debugfs_destroy(void)
{
}
static inline int batadv_debugfs_add_meshif(struct net_device *dev)
{
return 0;
}
static inline void batadv_debugfs_rename_meshif(struct net_device *dev)
{
}
static inline void batadv_debugfs_del_meshif(struct net_device *dev)
{
}
static inline
int batadv_debugfs_add_hardif(struct batadv_hard_iface *hard_iface)
{
return 0;
}
static inline
void batadv_debugfs_rename_hardif(struct batadv_hard_iface *hard_iface)
{
}
static inline
void batadv_debugfs_del_hardif(struct batadv_hard_iface *hard_iface)
{
}
#endif
#endif /* _NET_BATMAN_ADV_DEBUGFS_H_ */