linux-kernel - Re: [PATCH v2] statx: stx

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Message-ID: <Ze5ppBOFpVm1jyb+@dread.disaster.area>
Date: Mon, 11 Mar 2024 13:17:08 +1100
From: Dave Chinner <david@...morbit.com>
To: "Darrick J. Wong" <djwong@...nel.org>
Cc: Kent Overstreet <kent.overstreet@...ux.dev>,
	Neal Gompa <neal@...pa.dev>, linux-fsdevel@...r.kernel.org,
	linux-bcachefs@...r.kernel.org, linux-btrfs@...r.kernel.org,
	linux-kernel@...r.kernel.org, Josef Bacik <josef@...icpanda.com>,
	Miklos Szeredi <mszeredi@...hat.com>,
	Christian Brauner <brauner@...nel.org>,
	David Howells <dhowells@...hat.com>
Subject: Re: [PATCH v2] statx: stx_subvol

On Fri, Mar 08, 2024 at 08:56:33AM -0800, Darrick J. Wong wrote:
> Should the XFS data and rt volumes be reported with different stx_vol
> values?

No, because all the inodes are on the data volume and the same inode
can have data on the data volume or the rt volume. i.e. "data on rt,
truncate, clear rt, copy data back into data dev".  It's still the
same inode, and may have exactly the same data, so why should change
stx_vol and make it appear to userspace as being a different inode?

-Dave.
-- 
Dave Chinner
david@...morbit.com