linux-ext4 - Re: [PATCH] fscrypto: remove unneeded Kconfig dependencies

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Date:   Mon, 24 Oct 2016 22:41:08 +0200
From:   Richard Weinberger <richard@....at>
To:     Eric Biggers <ebiggers@...gle.com>, linux-fsdevel@...r.kernel.org
Cc:     linux-ext4@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net,
        tytso@....edu, jaegeuk@...nel.org
Subject: Re: [PATCH] fscrypto: remove unneeded Kconfig dependencies

On 24.10.2016 22:17, Eric Biggers wrote:
> SHA256 and ENCRYPTED_KEYS are not needed.  CTR shouldn't be needed
> either, but I left it for now because it was intentionally added by
> commit 71dea01ea2ed ("ext4 crypto: require CONFIG_CRYPTO_CTR if ext4
> encryption is enabled").  So it sounds like there may be a dependency
> problem elsewhere, which I have not been able to identify specifically,
> that must be solved before CTR can be removed.
> 
> Signed-off-by: Eric Biggers <ebiggers@...gle.com>

Reviewed-by: Richard Weinberger <richard@....at>

FWIW, Strictly speaking we could also get rid of the dependency on BLOCK.
Only very few functions in fs/crypto/crypto.c use block specific functions,
these could be placed in a different file.
The use case would be very small systems with UBIFS and encrypted files.
i.e. kexec() style bootloaders.

Thanks,
//richard
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