linux-ext4 - Re: [RFC][PATCH 00/12] Enhanced file stat system call

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Date:	Tue, 24 Nov 2015 00:50:25 -0800
From:	Christoph Hellwig <hch@...radead.org>
To:	Martin Steigerwald <martin@...htvoll.de>
Cc:	Christoph Hellwig <hch@...radead.org>, linux-btrfs@...r.kernel.org,
	David Howells <dhowells@...hat.com>, arnd@...db.de,
	linux-afs@...r.kernel.org, linux-nfs@...r.kernel.org,
	linux-cifs@...r.kernel.org, samba-technical@...ts.samba.org,
	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	linux-ext4@...r.kernel.org
Subject: Re: [RFC][PATCH 00/12] Enhanced file stat system call

On Tue, Nov 24, 2015 at 09:48:22AM +0100, Martin Steigerwald wrote:
> It might be interesting for BTRFS as well, to be able to ask what amount of 
> free space there currently is *at* a given path. Cause with BTRFS and 
> Subvolumes this may differ between different paths.

We can handle this trivial with the current statfs interface.  Take a
look at xfs_fs_statfs and xfs_qm_statvfs.
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