linux-ext4 - Re: [PATCH] Prevent creation of files larger than RLIMIT

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Message-ID: <20100503070111.GB13756@amitarora.in.ibm.com>
Date:	Mon, 3 May 2010 12:31:11 +0530
From:	"Amit K. Arora" <aarora@...ux.vnet.ibm.com>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Nikanth Karthikesan <knikanth@...e.de>, coly.li@...e.de,
	Nick Piggin <npiggin@...e.de>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	linux-fsdevel@...r.kernel.org, "Theodore Ts'o" <tytso@....edu>,
	Andreas Dilger <adilger@....com>, linux-ext4@...r.kernel.org,
	Eelis <opensuse.org@...tacts.eelis.net>,
	Amit Arora <aarora@...ibm.com>
Subject: Re: [PATCH] Prevent creation of files larger than RLIMIT_FSIZE
	using fallocate

On Sat, May 01, 2010 at 06:18:46AM -0400, Christoph Hellwig wrote:
> On Sat, May 01, 2010 at 12:34:26PM +0530, Amit K. Arora wrote:
> > Agreed. How about doing this check in the filesystem specific fallocate
> > inode routines instead ? For example, in ext4 we could do :
> 
> That looks okay - in fact XFS should already have this check because
> it re-uses the setattr implementation to set the size.

You are right. I have written a test and it passes on XFS, but fails on
ext4. 
 
> Can you submit an xfstests testcase to verify this behaviour on all
> filesystems?

Sure. Its ready and is under test. Will post shortly..

--
Regards,
Amit Arora
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