linux-kernel - Re: [PATCH v2 1/4] block: keyslot-manager: Introduce passthrough keyslot manager

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Message-ID: <20201027200441.GA2416412@gmail.com>
Date:   Tue, 27 Oct 2020 13:04:41 -0700
From:   Eric Biggers <ebiggers@...nel.org>
To:     Satya Tangirala <satyat@...gle.com>
Cc:     linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        dm-devel@...hat.com, Jens Axboe <axboe@...nel.dk>,
        Alasdair Kergon <agk@...hat.com>,
        Mike Snitzer <snitzer@...hat.com>
Subject: Re: [PATCH v2 1/4] block: keyslot-manager: Introduce passthrough
 keyslot manager

On Thu, Oct 15, 2020 at 09:46:29PM +0000, Satya Tangirala wrote:
> +/**
> + * blk_ksm_init_passthrough() - Init a passthrough keyslot manager
> + * @ksm: The keyslot manager to init
> + *
> + * Initialize a passthrough keyslot manager.
> + * Called by e.g. storage drivers to set up a keyslot manager in their
> + * request_queue, when the storage driver wants to manage its keys by itself.
> + * This is useful for inline encryption hardware that doesn't have the concept
> + * of keyslots, and for layered devices.
> + *
> + * See blk_ksm_init() for more details about the parameters.
> + */
> +void blk_ksm_init_passthrough(struct blk_keyslot_manager *ksm)
> +{
> +	memset(ksm, 0, sizeof(*ksm));
> +	init_rwsem(&ksm->lock);
> +}
> +EXPORT_SYMBOL_GPL(blk_ksm_init_passthrough);

The last paragraph of the comment ("See blk_ksm_init() for more details about
the parameters.") isn't useful and should be removed.

Otherwise this patch looks fine.  You can add:

Reviewed-by: Eric Biggers <ebiggers@...gle.com>

- Eric