linux-ext4 - Re: [PATCH v7 0/9] Inline Encryption Support

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Date:   Fri, 21 Feb 2020 09:16:17 -0800
From:   Eric Biggers <ebiggers@...nel.org>
To:     Satya Tangirala <satyat@...gle.com>
Cc:     linux-block@...r.kernel.org, linux-scsi@...r.kernel.org,
        linux-fscrypt@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-f2fs-devel@...ts.sourceforge.net, linux-ext4@...r.kernel.org,
        Barani Muthukumaran <bmuthuku@....qualcomm.com>,
        Kuohong Wang <kuohong.wang@...iatek.com>,
        Kim Boojin <boojin.kim@...sung.com>
Subject: Re: [PATCH v7 0/9] Inline Encryption Support

On Fri, Feb 21, 2020 at 03:50:41AM -0800, Satya Tangirala wrote:
> This patch series adds support for Inline Encryption to the block layer,
> UFS, fscrypt, f2fs and ext4.
[...]
> Changes v6 => v7:
>  - Keyslot management is now done on a per-request basis rather than a
>    per-bio basis.
>  - Storage drivers can now specify the maximum number of bytes they
>    can accept for the data unit number (DUN) for each crypto algorithm,
>    and upper layers can specify the minimum number of bytes of DUN they
>    want with the blk_crypto_key they send with the bio - a driver is
>    only considered to support a blk_crypto_key if the driver supports at
>    least as many DUN bytes as the upper layer wants. This is necessary
>    because storage drivers may not support as many bytes as the
>    algorithm specification dictates (for e.g. UFS only supports 8 byte
>    DUNs for AES-256-XTS, even though the algorithm specification
>    says DUNs are 16 bytes long).
>  - Introduce SB_INLINECRYPT to keep track of whether inline encryption
>    is enabled for a filesystem (instead of using an fscrypt_operation).
>  - Expose keyslot manager declaration and embed it within ufs_hba to
>    clean up code.
>  - Make blk-crypto preclude blk-integrity.
>  - Some bug fixes
>  - Introduce UFSHCD_QUIRK_BROKEN_CRYPTO for UFS drivers that don't
>    support inline encryption (yet)

This patchset can also be retrieved from

	Repo: https://git.kernel.org/pub/scm/fs/fscrypt/fscrypt.git
	Tag: inline-encryption-v7

For review purposes I also created a tag
inline-encryption-v6-rebased-onto-v7-base which is the v6 patchset rebased onto
the same base commit (v5.6-rc2).  So it's possible to see what changed by

	git diff inline-encryption-v6-rebased-onto-v7-base..inline-encryption-v7

(Although, I had to resolve conflicts in fs/crypto/ to do the rebase, so it's
not *exactly* v6.)

- Eric