forked from Minki/linux
a15fd3612d
batman-adv has an unusual way to manage softinterfaces. These will be created automatically when a user writes to the batman-adv/mesh_iface file in sysfs and removed when no slave device exists anymore. This behaviour cannot be changed without breaking compatibility with existing code. Instead other interfaces should be able to slightly reduce this behaviour and provide a more common reaction to a removal of a slave interface. Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <lindner_marek@yahoo.de> Acked-by: Antonio Quartulli <ordex@autistici.org> Signed-off-by: Antonio Quartulli <ordex@autistici.org>
82 lines
2.5 KiB
C
82 lines
2.5 KiB
C
/* Copyright (C) 2007-2013 B.A.T.M.A.N. contributors:
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*
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* Marek Lindner, Simon Wunderlich
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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, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA
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*/
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#ifndef _NET_BATMAN_ADV_HARD_INTERFACE_H_
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#define _NET_BATMAN_ADV_HARD_INTERFACE_H_
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enum batadv_hard_if_state {
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BATADV_IF_NOT_IN_USE,
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BATADV_IF_TO_BE_REMOVED,
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BATADV_IF_INACTIVE,
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BATADV_IF_ACTIVE,
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BATADV_IF_TO_BE_ACTIVATED,
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BATADV_IF_I_WANT_YOU,
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};
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/**
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* enum batadv_hard_if_cleanup - Cleanup modi for soft_iface after slave removal
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* @BATADV_IF_CLEANUP_KEEP: Don't automatically delete soft-interface
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* @BATADV_IF_CLEANUP_AUTO: Delete soft-interface after last slave was removed
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*/
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enum batadv_hard_if_cleanup {
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BATADV_IF_CLEANUP_KEEP,
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BATADV_IF_CLEANUP_AUTO,
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};
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extern struct notifier_block batadv_hard_if_notifier;
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struct batadv_hard_iface*
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batadv_hardif_get_by_netdev(const struct net_device *net_dev);
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int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface,
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const char *iface_name);
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void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface,
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enum batadv_hard_if_cleanup autodel);
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void batadv_hardif_remove_interfaces(void);
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int batadv_hardif_min_mtu(struct net_device *soft_iface);
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void batadv_update_min_mtu(struct net_device *soft_iface);
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void batadv_hardif_free_rcu(struct rcu_head *rcu);
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bool batadv_is_wifi_iface(int ifindex);
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static inline void
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batadv_hardif_free_ref(struct batadv_hard_iface *hard_iface)
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{
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if (atomic_dec_and_test(&hard_iface->refcount))
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call_rcu(&hard_iface->rcu, batadv_hardif_free_rcu);
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}
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static inline struct batadv_hard_iface *
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batadv_primary_if_get_selected(struct batadv_priv *bat_priv)
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{
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struct batadv_hard_iface *hard_iface;
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rcu_read_lock();
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hard_iface = rcu_dereference(bat_priv->primary_if);
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if (!hard_iface)
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goto out;
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if (!atomic_inc_not_zero(&hard_iface->refcount))
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hard_iface = NULL;
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out:
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rcu_read_unlock();
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return hard_iface;
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}
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#endif /* _NET_BATMAN_ADV_HARD_INTERFACE_H_ */
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