linux-kernel - Re: [PATCH 04/21] procfs: drop vmtruncate

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Message-ID: <5088111F.1020009@gmail.com>
Date:	Wed, 24 Oct 2012 18:02:39 +0200
From:	Marco Stornelli <marco.stornelli@...il.com>
To:	Christoph Hellwig <hch@...radead.org>
CC:	Linux FS Devel <linux-fsdevel@...r.kernel.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 04/21] procfs: drop vmtruncate

Il 24/10/2012 17:12, Christoph Hellwig ha scritto:
> On Sat, Oct 20, 2012 at 02:17:33PM +0200, Marco Stornelli wrote:
>> Removed vmtruncate
>>
>> Signed-off-by: Marco Stornelli <marco.stornelli@...il.com>
>
> As Al pointed out we probably shouldn't even allow truncate on procfs.
> Can look into refusing it instead, please?
>
>

Mmmm...for example the command "truncate --size=100 config.gz" is a nop, 
so it seems to me it makes no sense to support the size change, but I 
don't know if there are other use cases. However, should we return EPERM 
in case of size change checking it before inode_change_ok()?

Marco
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