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| author | Andrey Drobyshev <andrey.drobyshev@virtuozzo.com> | 2023-07-11 20:25:51 +0300 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2023-08-30 07:39:10 -0400 |
| commit | c54483b6f45a0c84e230728a1a9e7adf90345e15 (patch) | |
| tree | 5bf9bacf290a472997dc5cb756125cf5eb92ba9f /block | |
| parent | f187609f27b261702a17f79d20bf252ee0d4f9cd (diff) | |
| download | qemu-c54483b6f45a0c84e230728a1a9e7adf90345e15.zip qemu-c54483b6f45a0c84e230728a1a9e7adf90345e15.tar.gz qemu-c54483b6f45a0c84e230728a1a9e7adf90345e15.tar.bz2 | |
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>
Diffstat (limited to 'block')
| -rw-r--r-- | block/qcow2.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/block/qcow2.c b/block/qcow2.c index c51388e..b48cd9c 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -5197,6 +5197,7 @@ qcow2_co_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) { BDRVQcow2State *s = bs->opaque; bdi->cluster_size = s->cluster_size; + bdi->subcluster_size = s->subcluster_size; bdi->vm_state_offset = qcow2_vm_state_offset(s); bdi->is_dirty = s->incompatible_features & QCOW2_INCOMPAT_DIRTY; return 0; |