Re: [PATCH v3] block: ublk: enable zoned storage support

[Andreas Hindborg (Samsung)]

Niklas Cassel <Niklas.Cassel@xxxxxxx> writes:

> On Thu, Mar 16, 2023 at 03:55:38PM +0100, Andreas Hindborg wrote:
>> From: Andreas Hindborg <a.hindborg@xxxxxxxxxxx>
>
> Hello Andreas,
>
>
> I think that this patch is starting to look very nice!

Thanks!

>
>
<snip>
>> +
>> +int ublk_report_zones(struct gendisk *disk, sector_t sector,
>> +		      unsigned int nr_zones, report_zones_cb cb, void *data)
>> +{
>> +	unsigned int done_zones = 0;
>> +	struct ublk_device *ub = disk->private_data;
>> +	unsigned int zone_size_sectors = disk->queue->limits.chunk_sectors;
>> +	unsigned int first_zone = sector >> ilog2(zone_size_sectors);
>> +	struct blk_zone *buffer;
>> +	size_t buffer_length;
>> +	unsigned int max_zones_per_request;
>
> Nit: I would sort the variables differently.
>
> Perhaps:
>> +	struct ublk_device *ub = disk->private_data;
>> +	unsigned int zone_size_sectors = disk->queue->limits.chunk_sectors;
>> +	unsigned int first_zone = sector >> ilog2(zone_size_sectors);
>> +	unsigned int done_zones = 0;
>> +	unsigned int max_zones_per_request;
>> +	struct blk_zone *buffer;
>> +	size_t buffer_length;
>

Can I ask what is the reasoning behind this? I think they way you
propose looks better, but are there any rules one can follow for this?

Best regards
Andreas