[dm-devel] [PATCH v4 10/11] block: add a report_zones method

[Martin K. Petersen]

Damien,

> Dispatching a report zones command through the request queue is a
> major pain due to the command reply payload rewriting necessary. Given
> that blkdev_report_zones() is executing everything synchronously,
> implement report zones as a block device file operation instead,
> allowing major simplification of the code in many places.
>
> sd, null-blk, dm-linear and dm-flakey being the only block device
> drivers supporting exposing zoned block devices, these drivers are
> modified to provide the device side implementation of the
> report_zones() block device file operation.
>
> For device mappers, a new report_zones() target type operation is
> defined so that the upper block layer calls blkdev_report_zones() can
> be propagated down to the underlying devices of the dm targets.
> Implementation for this new operation is added to the dm-linear and
> dm-flakey targets.

Reviewed-by: Martin K. Petersen <martin.petersen at oracle.com>

-- 
Martin K. Petersen	Oracle Linux Engineering