Re: [PATCH v8 1/7] block: Add 'zoned' queue limit

[Hannes Reinecke <hare@suse.de>]

On 10/18/2016 08:40 AM, Damien Le Moal wrote:
> From: Damien Le Moal <damien.lemoal@hgst.com>
> 
> Add the zoned queue limit to indicate the zoning model of a block device.
> Defined values are 0 (BLK_ZONED_NONE) for regular block devices,
> 1 (BLK_ZONED_HA) for host-aware zone block devices and 2 (BLK_ZONED_HM)
> for host-managed zone block devices. The standards defined drive managed
> model is not defined here since these block devices do not provide any
> command for accessing zone information. Drive managed model devices will
> be reported as BLK_ZONED_NONE.
> 
> The helper functions blk_queue_zoned_model and bdev_zoned_model return
> the zoned limit and the functions blk_queue_is_zoned and bdev_is_zoned
> return a boolean for callers to test if a block device is zoned.
> 
> The zoned attribute is also exported as a string to applications via
> sysfs. BLK_ZONED_NONE shows as "none", BLK_ZONED_HA as "host-aware" and
> BLK_ZONED_HM as "host-managed".
> 
> Signed-off-by: Damien Le Moal <damien.lemoal@hgst.com>
> Reviewed-by: Christoph Hellwig <hch@lst.de>
> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
> Reviewed-by: Shaun Tancheff <shaun.tancheff@seagate.com>
> Tested-by: Shaun Tancheff <shaun.tancheff@seagate.com>
> ---
>  Documentation/ABI/testing/sysfs-block | 16 ++++++++++++
>  block/blk-settings.c                  |  1 +
>  block/blk-sysfs.c                     | 18 ++++++++++++++
>  include/linux/blkdev.h                | 47 +++++++++++++++++++++++++++++++++++
>  4 files changed, 82 insertions(+)
> 
Reviewed-by: Hannes Reinecke <hare@suse.com>

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		   Teamlead Storage & Networking
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