Re: [PATCH 1/4] block: add req op to reset all zones and flag

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On 2019/08/01 6:01, Chaitanya Kulkarni wrote:
> This patch introduces a new request operation REQ_OP_ZONE_RESET_ALL.
> This is useful for the applications like mkfs where it needs to reset
> all the zones present on the underlying block device. As part for this
> patch we also introduce new QUEUE_FLAG_ZONE_RESETALL which indicates the
> queue zone reset all capability and corresponding helper macro.
> 
> Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@xxxxxxx>
> ---
>  include/linux/blk_types.h | 2 ++
>  include/linux/blkdev.h    | 3 +++
>  2 files changed, 5 insertions(+)
> 
> diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
> index feff3fe4467e..3991b580d6bd 100644
> --- a/include/linux/blk_types.h
> +++ b/include/linux/blk_types.h
> @@ -282,6 +282,8 @@ enum req_opf {
>  	REQ_OP_ZONE_RESET	= 6,
>  	/* write the same sector many times */
>  	REQ_OP_WRITE_SAME	= 7,
> +	/* reset all the zone present on the device */
> +	REQ_OP_ZONE_RESET_ALL	= 8,
>  	/* write the zero filled sector many times */
>  	REQ_OP_WRITE_ZEROES	= 9,
>  
> diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
> index 1ef375dafb1c..474008bffee2 100644
> --- a/include/linux/blkdev.h
> +++ b/include/linux/blkdev.h
> @@ -611,6 +611,7 @@ struct request_queue {
>  #define QUEUE_FLAG_SCSI_PASSTHROUGH 23	/* queue supports SCSI commands */
>  #define QUEUE_FLAG_QUIESCED	24	/* queue has been quiesced */
>  #define QUEUE_FLAG_PCI_P2PDMA	25	/* device supports PCI p2p requests */
> +#define QUEUE_FLAG_ZONE_RESETALL 26	/* supports Zone Reset All */
>  
>  #define QUEUE_FLAG_MQ_DEFAULT	((1 << QUEUE_FLAG_IO_STAT) |		\
>  				 (1 << QUEUE_FLAG_SAME_COMP))
> @@ -630,6 +631,8 @@ bool blk_queue_flag_test_and_set(unsigned int flag, struct request_queue *q);
>  #define blk_queue_io_stat(q)	test_bit(QUEUE_FLAG_IO_STAT, &(q)->queue_flags)
>  #define blk_queue_add_random(q)	test_bit(QUEUE_FLAG_ADD_RANDOM, &(q)->queue_flags)
>  #define blk_queue_discard(q)	test_bit(QUEUE_FLAG_DISCARD, &(q)->queue_flags)
> +#define blk_queue_zone_resetall(q)	\
> +	test_bit(QUEUE_FLAG_ZONE_RESETALL, &(q)->queue_flags)
>  #define blk_queue_secure_erase(q) \
>  	(test_bit(QUEUE_FLAG_SECERASE, &(q)->queue_flags))
>  #define blk_queue_dax(q)	test_bit(QUEUE_FLAG_DAX, &(q)->queue_flags)
> 

Reviewed-by: Damien Le Moal <damien.lemoal@xxxxxxx>

-- 
Damien Le Moal
Western Digital Research




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