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Commit 088eb2d9 authored by Alexey Dobriyan's avatar Alexey Dobriyan Committed by David S. Miller
Browse files

netns 2/2: extract net_create() 



net_create() will be used by C/R to create fresh netns on restart.

Signed-off-by: default avatarAlexey Dobriyan <adobriyan@gmail.com>
Acked-by: default avatarSerge Hallyn <serue@us.ibm.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 4a84822c

net/core/net_namespace.c

+20 −24
Original line number Diff line number Diff line
@@ -115,38 +115,34 @@ static void net_free(struct net *net) 
	kmem_cache_free(net_cachep, net);

}



struct net *copy_net_ns(unsigned long flags, struct net *old_net)

static struct net *net_create(void)

{

	struct net *new_net = NULL;

	int err;



	if (!(flags & CLONE_NEWNET))

		return get_net(old_net);



	err = -ENOMEM;

	new_net = net_alloc();

	if (!new_net)

		goto out_err;

	struct net *net;

	int rv;



	net = net_alloc();

	if (!net)

		return ERR_PTR(-ENOMEM);

	mutex_lock(&net_mutex);

	err = setup_net(new_net);

	if (!err) {

	rv = setup_net(net);

	if (rv == 0) {

		rtnl_lock();

		list_add_tail(&new_net->list, &net_namespace_list);

		list_add_tail(&net->list, &net_namespace_list);

		rtnl_unlock();

	}

	mutex_unlock(&net_mutex);

	if (rv < 0) {

		net_free(net);

		return ERR_PTR(rv);

	}

	return net;

}



	if (err)

		goto out_free;

out:

	return new_net;



out_free:

	net_free(new_net);

out_err:

	new_net = ERR_PTR(err);

	goto out;

struct net *copy_net_ns(unsigned long flags, struct net *old_net)

{

	if (!(flags & CLONE_NEWNET))

		return get_net(old_net);

	return net_create();

}



static void cleanup_net(struct work_struct *work)