[PATCH 7/8] net: Allow setting the network namespace by fd

[Brian Haley]

On 09/23/2010 04:51 AM, Eric W. Biederman wrote:
> 
> Take advantage of the new abstraction and allow network devices
> to be placed in any network namespace that we have a fd to talk
> about.
> 
...
> +struct net *get_net_ns_by_fd(int fd)
> +{
> +	struct proc_inode *ei;
> +	struct file *file;
> +	struct net *net;
> +
> +	file = NULL;

No need to initialize this.

> +	net = ERR_PTR(-EINVAL);

or this?

> +	file = proc_ns_fget(fd);
> +	if (!fd)
> +		goto out;
> +		return ERR_PTR(-EINVAL);

Shouldn't this be:

	if (!file)

And the "goto" seems wrong, especially without a {} here.  Unless you
meant to keep the "goto" and branch below?

-Brian

> +
> +	ei = PROC_I(file->f_dentry->d_inode);
> +	if (ei->ns_ops != &netns_operations)
> +		goto out;
> +
> +	net = get_net(ei->ns);
> +out:
> +	if (file)
> +		fput(file);
> +	return net;
> +}