On Thu, Dec 19, 2013 at 10:27:40AM +0800, Hu Tao wrote:
> Signed-off-by: Hu Tao <hu...@cn.fujitsu.com>
> ---
> block/qcow2.c | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/block/qcow2.c b/block/qcow2.c
> index 32cb39f..487a595 100644
> --- a/block/qcow2.c
> +++ b/block/qcow2.c
> @@ -2188,6 +2188,12 @@ static int qcow2_amend_options(BlockDriverState *bs,
> return 0;
> }
>
> +static int qcow2_preallocate(BlockDriverState *bs, int64_t offset,
> + int64_t length)
> +{
> + return bdrv_preallocate(bs->file, offset, length);
> +}
What about qcow2-level preallocation (metadata)?
I'm not sure what the meaning of offset and length are here - are they
supposed to be virtual disk LBAs. They are being passed through to
bs->file so they actually become physical file offsets.
