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Date: Tue, 10 May 2016 22:46:26 -0700
From: Christoph Hellwig <hch@infradead.org>
To: Qu Wenruo <quwenruo@cn.fujitsu.com>
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Subject: Re: [PATCH] fstests: btrfs: Test fiemap ioctl on completely deduped
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On Wed, May 11, 2016 at 10:14:42AM +0800, Qu Wenruo wrote:
> BTW, does other fs support reflink file range?
> I found a lot xfs test cases using reflink, but I still can't reflink a file
> range inside the same inode

XFS work is under development and not in mainline yet.

Also NFS can support reflinks if the server supports it, which includes
a Linux server with btrfs or the XFS patches.