linux-kernel - Re: [PATCH v4 5/5] dm: set DM_TARGET_PASSES

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Date:   Wed, 10 Feb 2021 12:24:58 -0800
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>,
        Mike Snitzer <snitzer@...hat.com>,
        Alasdair Kergon <agk@...hat.com>
Subject: Re: [PATCH v4 5/5] dm: set DM_TARGET_PASSES_CRYPTO feature for some
 targets

On Mon, Feb 01, 2021 at 05:10:19AM +0000, Satya Tangirala wrote:
> dm-linear and dm-flakey obviously can pass through inline crypto support.
> 
> Co-developed-by: Eric Biggers <ebiggers@...gle.com>
> Signed-off-by: Eric Biggers <ebiggers@...gle.com>
> Signed-off-by: Satya Tangirala <satyat@...gle.com>
> ---
>  drivers/md/dm-flakey.c | 4 +++-
>  drivers/md/dm-linear.c | 5 +++--
>  2 files changed, 6 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/md/dm-flakey.c b/drivers/md/dm-flakey.c
> index a2cc9e45cbba..30c6bc151213 100644
> --- a/drivers/md/dm-flakey.c
> +++ b/drivers/md/dm-flakey.c
> @@ -482,8 +482,10 @@ static struct target_type flakey_target = {
>  	.name   = "flakey",
>  	.version = {1, 5, 0},
>  #ifdef CONFIG_BLK_DEV_ZONED
> -	.features = DM_TARGET_ZONED_HM,
> +	.features = DM_TARGET_ZONED_HM | DM_TARGET_PASSES_CRYPTO,
>  	.report_zones = flakey_report_zones,
> +#else
> +	.features = DM_TARGET_PASSES_CRYPTO,
>  #endif
>  	.module = THIS_MODULE,
>  	.ctr    = flakey_ctr,
> diff --git a/drivers/md/dm-linear.c b/drivers/md/dm-linear.c
> index 00774b5d7668..fc9c4272c10d 100644
> --- a/drivers/md/dm-linear.c
> +++ b/drivers/md/dm-linear.c
> @@ -229,10 +229,11 @@ static struct target_type linear_target = {
>  	.version = {1, 4, 0},
>  #ifdef CONFIG_BLK_DEV_ZONED
>  	.features = DM_TARGET_PASSES_INTEGRITY | DM_TARGET_NOWAIT |
> -		    DM_TARGET_ZONED_HM,
> +		    DM_TARGET_ZONED_HM | DM_TARGET_PASSES_CRYPTO,
>  	.report_zones = linear_report_zones,
>  #else
> -	.features = DM_TARGET_PASSES_INTEGRITY | DM_TARGET_NOWAIT,
> +	.features = DM_TARGET_PASSES_INTEGRITY | DM_TARGET_NOWAIT |
> +		    DM_TARGET_PASSES_CRYPTO,
>  #endif
>  	.module = THIS_MODULE,
>  	.ctr    = linear_ctr,
> -- 

This latest version looks good to me.  If it's needed despite my
Co-developed-by, feel free to add:

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

BTW, the #ifdef for CONFIG_BLK_DEV_ZONED is error-prone (though it's a
pre-existing issue).  I wonder if DM_TARGET_ZONED_HM should be defined to 0 when
!CONFIG_BLK_DEV_ZONED, which would avoid the need for the #ifdef on .features.

- Eric