forked from Minki/linux
6da7be7d24
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>
81 lines
2.0 KiB
C
81 lines
2.0 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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#ifndef _NET_BATMAN_ADV_DEBUGFS_H_
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#define _NET_BATMAN_ADV_DEBUGFS_H_
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#include "main.h"
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struct net_device;
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#define BATADV_DEBUGFS_SUBDIR "batman_adv"
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#if IS_ENABLED(CONFIG_BATMAN_ADV_DEBUGFS)
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void batadv_debugfs_init(void);
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void batadv_debugfs_destroy(void);
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int batadv_debugfs_add_meshif(struct net_device *dev);
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void batadv_debugfs_rename_meshif(struct net_device *dev);
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void batadv_debugfs_del_meshif(struct net_device *dev);
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int batadv_debugfs_add_hardif(struct batadv_hard_iface *hard_iface);
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void batadv_debugfs_rename_hardif(struct batadv_hard_iface *hard_iface);
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void batadv_debugfs_del_hardif(struct batadv_hard_iface *hard_iface);
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#else
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static inline void batadv_debugfs_init(void)
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{
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}
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static inline void batadv_debugfs_destroy(void)
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{
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}
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static inline int batadv_debugfs_add_meshif(struct net_device *dev)
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{
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return 0;
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}
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static inline void batadv_debugfs_rename_meshif(struct net_device *dev)
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{
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}
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static inline void batadv_debugfs_del_meshif(struct net_device *dev)
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{
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}
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static inline
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int batadv_debugfs_add_hardif(struct batadv_hard_iface *hard_iface)
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{
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return 0;
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}
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static inline
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void batadv_debugfs_rename_hardif(struct batadv_hard_iface *hard_iface)
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{
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}
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static inline
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void batadv_debugfs_del_hardif(struct batadv_hard_iface *hard_iface)
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{
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}
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#endif
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#endif /* _NET_BATMAN_ADV_DEBUGFS_H_ */
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