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Commit d4655795 authored by Pavel Emelyanov's avatar Pavel Emelyanov Committed by David S. Miller
Browse files

[NET]: Relax the reference counting of init_net_ns 



When the CONFIG_NET_NS is n there's no need in refcounting
the initial net namespace. So relax this code by making a
stupid stubs for the "n" case.

Signed-off-by: default avatarPavel Emelyanov <xemul@openvz.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 1dba323b

include/net/net_namespace.h

+25 −8
Original line number Diff line number Diff line
@@ -51,13 +51,12 @@ static inline struct net *copy_net_ns(unsigned long flags, struct net *net_ns) 
}

#endif



#ifdef CONFIG_NET_NS

extern void __put_net(struct net *net);



static inline struct net *get_net(struct net *net)

{

#ifdef CONFIG_NET

	atomic_inc(&net->count);

#endif

	return net;

}
@@ -75,26 +74,44 @@ static inline struct net *maybe_get_net(struct net *net) 


static inline void put_net(struct net *net)

{

#ifdef CONFIG_NET

	if (atomic_dec_and_test(&net->count))

		__put_net(net);

#endif

}



static inline struct net *hold_net(struct net *net)

{

#ifdef CONFIG_NET

	atomic_inc(&net->use_count);

#endif

	return net;

}



static inline void release_net(struct net *net)

{

#ifdef CONFIG_NET

	atomic_dec(&net->use_count);

#endif

}

#else

static inline struct net *get_net(struct net *net)

{

	return net;

}



static inline void put_net(struct net *net)

{

}



static inline struct net *hold_net(struct net *net)

{

	return net;

}



static inline void release_net(struct net *net)

{

}



static inline struct net *maybe_get_net(struct net *net)

{

	return net;

}

#endif



#define for_each_net(VAR)				\

	list_for_each_entry(VAR, &net_namespace_list, list)