linux-kernel - Re: Bug in ext4/btrfs fallocate?

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Message-Id: <6A86E6B8-E14E-484B-BBF5-F3C580337661@dilger.ca>
Date:	Tue, 28 Dec 2010 23:46:39 -0700
From:	Andreas Dilger <adilger@...ger.ca>
To:	Marco Stornelli <marco.stornelli@...il.com>
Cc:	linux-ext4@...r.kernel.org, linux-btrfs@...r.kernel.org,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Linux FS Devel <linux-fsdevel@...r.kernel.org>,
	tytso@....edu, chris.mason@...cle.com
Subject: Re: Bug in ext4/btrfs fallocate?

On 2010-12-28, at 09:06, Marco Stornelli wrote:
> it seems that ext4/btrfs code for fallocate doesn't check for
> immutable/append inode flag.

fallocate() probably shouldn't be allowed for immutable files, but it makes a lot of sense to call fallocate() on append-only files to avoid fragmentation, though it should only be called with the KEEP_SIZE flag.

Cheers, Andreas





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