linux-kernel - Re: [PATCH] ext4: allow defrag (EXT4_IOC_MOVE

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Message-ID: <20100402214831.GN8298@thunk.org>
Date:	Fri, 2 Apr 2010 17:48:31 -0400
From:	tytso@....edu
To:	Christian Borntraeger <borntraeger@...ibm.com>
Cc:	linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org,
	Akira Fujita <a-fujita@...jp.nec.com>
Subject: Re: [PATCH] ext4: allow defrag (EXT4_IOC_MOVE_EXT) in 32bit compat
 mode

On Sun, Mar 07, 2010 at 09:32:10PM +0100, Christian Borntraeger wrote:
> I have an x86_64 kernel with i386 userspace. e4defrag fails on the
> EXT4_IOC_MOVE_EXT ioctl because it is not wired up for the compat
> case. It seems that struct move_extent is compat save, only types
> with fixed widths are used:
> {
>         __u32 reserved;         /* should be zero */
>         __u32 donor_fd;         /* donor file descriptor */
>         __u64 orig_start;       /* logical start offset in block for orig */
>         __u64 donor_start;      /* logical start offset in block for donor */
>         __u64 len;              /* block length to be moved */
>         __u64 moved_len;        /* moved block length */
> };
> 
> Lets just wire up EXT4_IOC_MOVE_EXT for the compat case.

Thanks, added to the ext4 patch queue.

							- Ted
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