linux-kernel - Re: [PATCH 1/4] block: add zone open, close and finish support

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Date:   Mon, 24 Jun 2019 12:43:19 -0700
From:   Bart Van Assche <bvanassche@....org>
To:     Matias Bjørling <mb@...htnvm.io>, axboe@...com,
        hch@....de, damien.lemoal@....com, chaitanya.kulkarni@....com,
        dmitry.fomichev@....com, ajay.joshi@....com,
        aravind.ramesh@....com, martin.petersen@...cle.com,
        James.Bottomley@...senPartnership.com, agk@...hat.com,
        snitzer@...hat.com
Cc:     linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-scsi@...r.kernel.org, dm-devel@...hat.com,
        Matias Bjørling <matias.bjorling@....com>
Subject: Re: [PATCH 1/4] block: add zone open, close and finish support

On 6/21/19 6:07 AM, Matias Bjørling wrote:
> diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
> index 95202f80676c..067ef9242275 100644
> --- a/include/linux/blk_types.h
> +++ b/include/linux/blk_types.h
> @@ -284,13 +284,20 @@ enum req_opf {
>   	REQ_OP_DISCARD		= 3,
>   	/* securely erase sectors */
>   	REQ_OP_SECURE_ERASE	= 5,
> -	/* reset a zone write pointer */
> -	REQ_OP_ZONE_RESET	= 6,
>   	/* write the same sector many times */
>   	REQ_OP_WRITE_SAME	= 7,
>   	/* write the zero filled sector many times */
>   	REQ_OP_WRITE_ZEROES	= 9,
>   
> +	/* reset a zone write pointer */
> +	REQ_OP_ZONE_RESET	= 16,
> +	/* Open zone(s) */
> +	REQ_OP_ZONE_OPEN	= 17,
> +	/* Close zone(s) */
> +	REQ_OP_ZONE_CLOSE	= 18,
> +	/* Finish zone(s) */
> +	REQ_OP_ZONE_FINISH	= 19,
> +
>   	/* SCSI passthrough using struct scsi_request */
>   	REQ_OP_SCSI_IN		= 32,
>   	REQ_OP_SCSI_OUT		= 33,
> @@ -375,6 +382,22 @@ static inline void bio_set_op_attrs(struct bio *bio, unsigned op,
>   	bio->bi_opf = op | op_flags;
>   }

Are the new operation types ever passed to op_is_write()? The definition 
of that function is as follows:

static inline bool op_is_write(unsigned int op)
{
	return (op & 1);
}