linux-ext4 - Re: [PATCH 2/5] direct-io: add support for fscrypt using blk-crypto

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Message-ID: <20200710053406.GA25530@infradead.org>
Date:   Fri, 10 Jul 2020 06:34:06 +0100
From:   Christoph Hellwig <hch@...radead.org>
To:     Satya Tangirala <satyat@...gle.com>
Cc:     linux-fscrypt@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-f2fs-devel@...ts.sourceforge.net, linux-ext4@...r.kernel.org,
        Eric Biggers <ebiggers@...gle.com>
Subject: Re: [PATCH 2/5] direct-io: add support for fscrypt using blk-crypto

On Thu, Jul 09, 2020 at 07:47:48PM +0000, Satya Tangirala wrote:
> From: Eric Biggers <ebiggers@...gle.com>
> 
> Set bio crypt contexts on bios by calling into fscrypt when required,
> and explicitly check for DUN continuity when adding pages to the bio.
> (While DUN continuity is usually implied by logical block contiguity,
> this is not the case when using certain fscrypt IV generation methods
> like IV_INO_LBLK_32).

I know it is asking you for more work, but instead of adding more
features to the legacy direct I/O code, could you just switch the user
of it (I guess this is for f2f2?) to the iomap one?