From: Christoph Hellwig <hch@lst.de>
To: Amir Goldstein <amir73il@gmail.com>
Cc: Christoph Hellwig <hch@lst.de>,
"Darrick J . Wong" <darrick.wong@oracle.com>,
Miklos Szeredi <miklos@szeredi.hu>,
Vivek Goyal <vgoyal@redhat.com>,
Al Viro <viro@zeniv.linux.org.uk>,
linux-xfs <linux-xfs@vger.kernel.org>,
linux-unionfs@vger.kernel.org,
linux-fsdevel <linux-fsdevel@vger.kernel.org>
Subject: Re: [PATCH v2] xfs: publish UUID in struct super_block
Date: Tue, 2 May 2017 16:17:51 +0200 [thread overview]
Message-ID: <20170502141751.GA21564@lst.de> (raw)
In-Reply-To: <CAOQ4uxjKbgCwhV4iBNVyfmS5+iR3o1BPF+PDj7YmrPP-qTv1eA@mail.gmail.com>
On Tue, May 02, 2017 at 05:13:56PM +0300, Amir Goldstein wrote:
> How can it create problems if uniqueness is not guaranteed with
> Current s_uuid? Even if we did make the xfs uuid table code generic
> It couldn't be the vfs default. Filesystems will have to opt in.
It creates problems if you e.g. mount an ext4 fs and a dm snaphot of
it. The non-XFS file systems are simply buggy in this regard.
Non-uniqueue uuids are an absolute no-go.
next prev parent reply other threads:[~2017-05-02 14:17 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-28 14:00 [PATCH v2] xfs: publish UUID in struct super_block Amir Goldstein
2017-04-28 15:13 ` Darrick J. Wong
2017-05-02 7:30 ` Christoph Hellwig
2017-05-02 14:13 ` Amir Goldstein
2017-05-02 14:17 ` Christoph Hellwig [this message]
2017-05-02 14:27 ` Amir Goldstein
2017-05-02 14:47 ` Christoph Hellwig
2017-05-02 15:08 ` Miklos Szeredi
2017-05-02 15:17 ` Christoph Hellwig
2017-05-02 17:09 ` Amir Goldstein
2017-05-02 18:25 ` Amir Goldstein
2017-05-02 18:30 ` Richard Weinberger
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