Re: backup/restore of fscrypt files

[Eric Biggers <ebiggers@xxxxxxxxxx>]

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
RWF_ENCODED
(https://lkml.kernel.org/linux-fsdevel/cover.1605723568.git.osandov@xxxxxx),
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