linux-kernel - Re: Racy /proc creations interfaces

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Message-ID: <20061227135624.GP17561@ftp.linux.org.uk>
Date:	Wed, 27 Dec 2006 13:56:24 +0000
From:	Al Viro <viro@....linux.org.uk>
To:	Alexey Dobriyan <adobriyan@...nvz.org>
Cc:	linux-kernel@...r.kernel.org, devel@...nvz.org
Subject: Re: Racy /proc creations interfaces

On Wed, Dec 27, 2006 at 04:42:23PM +0300, Alexey Dobriyan wrote:
> 
>    	struct proc_entry_raw foo_pe_raw = {
> 		.owner = THIS_MODULE,
> 		.name = "foo",
> 		.mode = 0644,
> 		.read_proc = foo_read_proc,
> 		.data = foo_data,
> 		.parent = foo_parent,
> 	};
> 
> 	pde = create_proc_entry(&foo_pe_raw);
> 	if (!pde)
> 		return -ENOMEM;
> 
>    where "struct proc_entry_raw" is cut down version of "struct proc_dir_entry"

Ewwwwwwwwwwwwwww

Please, please no.  Especially not .parent.  If anything, let's add a
helper saying "it's all set up now".  And turn create_proc_entry()
into a macro that would pass THIS_MODULE to underlying function and
call that helper, so that simple cases wouldn't have to bother at all.
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