[PATCH v5 06/28] block: Remember zone capacity when revalidating zones

[Bart Van Assche]

On 4/3/24 01:42, Damien Le Moal wrote:
> In preparation for adding zone write plugging, modify
> blk_revalidate_disk_zones() to get the capacity of zones of a zoned
> block device. This capacity value as a number of 512B sectors is stored
> in the gendisk zone_capacity field.
> 
> Given that host-managed SMR disks (including zoned UFS drives) and all
> known NVMe ZNS devices have the same zone capacity for all zones
> blk_revalidate_disk_zones() returns an error if different capacities are
> detected for different zones.
> 
> This also adds check to verify that the values reported by the device
> for zone capacities are correct, that is, that the zone capacity is
> never 0, does not exceed the zone size and is equal to the zone size for
> conventional zones.

Reviewed-by: Bart Van Assche <bvanassche at acm.org>