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From: Colin Walters <walters@verbum.org>
To: Yevhen Kyriukha <kirgene@gmail.com>
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Date: Tue, 02 Jul 2013 09:29:22 -0400
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Cc: Patches and discussions about the oe-core layer
	<openembedded-core@lists.openembedded.org>
Subject: Re: Create btrfs subvolume during image building
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On Tue, 2013-07-02 at 15:04 +0300, Yevhen Kyriukha wrote:
> Hi!
> 
> 
> I'd like to create image with btrfs rootfs partition.
> I want to store all files on separate subvolume on btrfs partition.
> For this purpose I'm creating *.bbclass that simply extends IMAGE_CMD.
> 
> 
> The problem is that to create btrfs subvolume I need to mount it
> first, but only root can execute "mount".

Another option is libguestfs; recent versions support btrfs.