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Commit 13b6f576 authored by Eric W. Biederman's avatar Eric W. Biederman
Browse files

ns proc: Add support for the network namespace. 



Implementing file descriptors for the network namespace
is simple and straight forward.

Acked-by: default avatarDavid S. Miller <davem@davemloft.net>
Acked-by: default avatarDaniel Lezcano <daniel.lezcano@free.fr>
Signed-off-by: default avatarEric W. Biederman <ebiederm@xmission.com>
parent 0663c6f8

fs/proc/namespaces.c

+3 −0
Original line number Original line Diff line number Diff line
@@ -16,6 +16,9 @@ 








static const struct proc_ns_operations *ns_entries[] = {

static const struct proc_ns_operations *ns_entries[] = {

#ifdef CONFIG_NET_NS

	&netns_operations,

#endif

};

};





static const struct file_operations ns_file_operations = {

static const struct file_operations ns_file_operations = {

include/linux/proc_fs.h

+1 −0
Original line number Original line Diff line number Diff line
@@ -265,6 +265,7 @@ struct proc_ns_operations { 
	void (*put)(void *ns);

	void (*put)(void *ns);

	int (*install)(struct nsproxy *nsproxy, void *ns);

	int (*install)(struct nsproxy *nsproxy, void *ns);

};

};

extern const struct proc_ns_operations netns_operations;





union proc_op {

union proc_op {

	int (*proc_get_link)(struct inode *, struct path *);

	int (*proc_get_link)(struct inode *, struct path *);

net/core/net_namespace.c

+31 −0
Original line number Original line Diff line number Diff line
@@ -573,3 +573,34 @@ void unregister_pernet_device(struct pernet_operations *ops) 
	mutex_unlock(&net_mutex);

	mutex_unlock(&net_mutex);

}

}

EXPORT_SYMBOL_GPL(unregister_pernet_device);

EXPORT_SYMBOL_GPL(unregister_pernet_device);



#ifdef CONFIG_NET_NS

static void *netns_get(struct task_struct *task)

{

	struct net *net;

	rcu_read_lock();

	net = get_net(task->nsproxy->net_ns);

	rcu_read_unlock();

	return net;

}



static void netns_put(void *ns)

{

	put_net(ns);

}



static int netns_install(struct nsproxy *nsproxy, void *ns)

{

	put_net(nsproxy->net_ns);

	nsproxy->net_ns = get_net(ns);

	return 0;

}



const struct proc_ns_operations netns_operations = {

	.name		= "net",

	.type		= CLONE_NEWNET,

	.get		= netns_get,

	.put		= netns_put,

	.install	= netns_install,

};

#endif