Re: [PATCH v9 25/34] qcow2: Update L2 bitmap in qcow2_alloc_cluster_link_l2()

[Max Reitz]

On 28.06.20 13:02, Alberto Garcia wrote:
> The L2 bitmap needs to be updated after each write to indicate what
> new subclusters are now allocated. This needs to happen even if the
> cluster was already allocated and the L2 entry was otherwise valid.
> 
> In some cases however a write operation doesn't need change the L2
> bitmap (because all affected subclusters were already allocated). This
> is detected in calculate_l2_meta(), and qcow2_alloc_cluster_link_l2()
> is never called in those cases.
> 
> Signed-off-by: Alberto Garcia <berto@igalia.com>
> Reviewed-by: Eric Blake <eblake@redhat.com>
> ---
>  block/qcow2-cluster.c | 18 ++++++++++++++++++
>  1 file changed, 18 insertions(+)

Reviewed-by: Max Reitz <mreitz@redhat.com>

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