linux-ext4 - Re: [PATCH 1/3] fscrypt: add support for inline-encryption-optimized policies

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Message-ID: <20191023092816.GB23274@infradead.org>
Date:   Wed, 23 Oct 2019 02:28:16 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Dave Chinner <david@...morbit.com>, linux-fscrypt@...r.kernel.org,
        linux-ext4@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net,
        linux-fsdevel@...r.kernel.org, Satya Tangirala <satyat@...gle.com>,
        Paul Crowley <paulcrowley@...gle.com>,
        Paul Lawrence <paullawrence@...gle.com>,
        "Theodore Y . Ts'o" <tytso@....edu>,
        Jaegeuk Kim <jaegeuk@...nel.org>
Subject: Re: [PATCH 1/3] fscrypt: add support for inline-encryption-optimized
 policies

On Mon, Oct 21, 2019 at 11:00:04PM -0700, Eric Biggers wrote:
> An alternative which would work nicely on ext4 and xfs (if xfs supported
> fscrypt) would be to pass the physical block number as the DUN.  However, that
> wouldn't work at all on f2fs because f2fs moves data blocks around.

XFS can also move data blocks around.  Even ext4 can do that for limited
cases (defrag).