tree 5bf9bacf290a472997dc5cb756125cf5eb92ba9f
parent f187609f27b261702a17f79d20bf252ee0d4f9cd
author Andrey Drobyshev <andrey.drobyshev@virtuozzo.com> 1689096351 +0300
committer Stefan Hajnoczi <stefanha@redhat.com> 1693395550 -0400

block: add subcluster_size field to BlockDriverInfo

This is going to be used in the subsequent commit as requests alignment
(in particular, during copy-on-read).  This value only makes sense for
the formats which support subclusters (currently QCOW2 only).  If this
field isn't set by driver's own bdrv_get_info() implementation, we
simply set it equal to the cluster size thus treating each cluster as
having a single subcluster.

Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: Andrey Drobyshev <andrey.drobyshev@virtuozzo.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-ID: <20230711172553.234055-2-andrey.drobyshev@virtuozzo.com>