linux-kernel - RE: [PATCH 2/3] xfs: Add support IOC_MOV

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Message-id: <001801cf9b3f$ad786ff0$08694fd0$@samsung.com>
Date:	Wed, 09 Jul 2014 15:33:21 +0900
From:	Namjae Jeon <namjae.jeon@...sung.com>
To:	'Christoph Hellwig' <hch@...radead.org>
Cc:	'Dave Chinner' <david@...morbit.com>,
	'Theodore Ts'o' <tytso@....edu>,
	'linux-ext4' <linux-ext4@...r.kernel.org>,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	'Luk?? Czerner' <lczerner@...hat.com>,
	'Brian Foster' <bfoster@...hat.com>,
	'Ashish Sangwan' <a.sangwan@...sung.com>, xfs@....sgi.com
Subject: RE: [PATCH 2/3] xfs: Add support IOC_MOV_DATA ioctl

> 
> On Tue, Jul 08, 2014 at 08:59:49PM +0900, Namjae Jeon wrote:
> > This patch implements fs ioctl's IOC_MOV_DATA for XFS.
> 
> Shouldn't this share code with the XFS_IOC_SWAPEXT implementation?
Lukas has raised the same question for ext4.
Both xfs(XFS_IOC_SWAPEXT) and ext4(EXT4_IOC_MOVE_EXT) has ioctls which uses
almost similar kind of structure as struct mov_data.
As such, there seems to be possiblity for sharing basic code (I will try)
used for sanity checking in IOC_MOV_DATA to be shared with these ioctls
but the core functionality code will remain different.

Thanks!

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