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netns 2/2: extract net_create()

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

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexey Dobriyan 2009-05-04 11:12:14 -07:00 committed by David S. Miller
parent 4a84822c60
commit 088eb2d905
1 changed files with 20 additions and 24 deletions
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44
net/core/net_namespace.c
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@ -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)