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Date:   Mon, 30 Nov 2020 11:42:28 -0800
From:   Eric Biggers <>
To:     Andreas Dilger <>
Cc:     Theodore Ts'o <>,,
        Ext4 Developers List <>,,
        linux-fsdevel <>,
        Sebastien Buisson <>
Subject: Re: backup/restore of fscrypt files

On Mon, Nov 30, 2020 at 10:39:10AM -0800, Eric Biggers wrote:
> (Allowing only direct I/O on files that don't have encryption key unavailable
> may help...)

It may sense to only provide the ciphertext when reads are done using
rather than making normal reads return ciphertext when the key is unavailable.

Ciphertext reads would always be uncached, which would avoid two conflicting
uses of the same address_space.

- Eric

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