Re: [PATCH 3/6] block/file-posix: Do not force-cap *pnum

[Eric Blake]

On Thu, Jun 17, 2021 at 05:52:44PM +0200, Max Reitz wrote:
> bdrv_co_block_status() does it for us, we do not need to do it here.
> 
> The advantage of not capping *pnum is that bdrv_co_block_status() can
> cache larger data regions than requested by its caller.

We should update the documentation in include/block/block_int.h to
mention that the driver's block_status callback may treat *pnum as a
soft cap, and that returning a larger value is fine.

But I agree with this change in the individual drivers, as long as we
remember to make our global contract explicit that we can now rely on
it ;)

Reviewed-by: Eric Blake <eblake@redhat.com>

-- 
Eric Blake, Principal Software Engineer
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