linux-ext4 - Re: [PATCH v8 06/20] fscrypt: refactor key setup code in preparation for v2 policies

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Message-ID: <20190812223822.GE28705@mit.edu>
Date:   Mon, 12 Aug 2019 18:38:22 -0400
From:   "Theodore Y. Ts'o" <tytso@....edu>
To:     Eric Biggers <ebiggers@...nel.org>
Cc:     linux-fscrypt@...r.kernel.org, linux-ext4@...r.kernel.org,
        linux-f2fs-devel@...ts.sourceforge.net,
        linux-mtd@...ts.infradead.org, linux-fsdevel@...r.kernel.org,
        linux-crypto@...r.kernel.org, keyrings@...r.kernel.org,
        linux-api@...r.kernel.org, Satya Tangirala <satyat@...gle.com>,
        Paul Crowley <paulcrowley@...gle.com>,
        Jaegeuk Kim <jaegeuk@...nel.org>
Subject: Re: [PATCH v8 06/20] fscrypt: refactor key setup code in preparation
 for v2 policies

On Mon, Aug 05, 2019 at 09:25:07AM -0700, Eric Biggers wrote:
> From: Eric Biggers <ebiggers@...gle.com>
> 
> Do some more refactoring of the key setup code, in preparation for
> introducing a filesystem-level keyring and v2 encryption policies:
> 
> - Now that ci_inode exists, don't pass around the inode unnecessarily.
> 
> - Define a function setup_file_encryption_key() which handles the crypto
>   key setup given an under-construction fscrypt_info.  Don't pass the
>   fscrypt_context, since everything is in the fscrypt_info.
>   [This will be extended for v2 policies and the fs-level keyring.]
> 
> - Define a function fscrypt_set_derived_key() which sets the per-file
>   key, without depending on anything specific to v1 policies.
>   [This will also be used for v2 policies.]
> 
> - Define a function fscrypt_setup_v1_file_key() which takes the raw
>   master key, thus separating finding the key from using it.
>   [This will also be used if the key is found in the fs-level keyring.]
> 
> Signed-off-by: Eric Biggers <ebiggers@...gle.com>

Looks good, you can add:

Reviewed-by: Theodore Ts'o <tytso@....edu>

						- Ted