Re: [Qemu-devel] [RFC 07/24] qed: make qed_alloc_clusters round up offset to nearest cluster

[Kevin Wolf <kwolf@redhat.com>]

Am 29.07.2011 06:49, schrieb Devin Nakamura:
> Signed-off-by: Devin Nakamura <devin122@gmail.com>
> ---
>  block/qed.c |    3 +++
>  1 files changed, 3 insertions(+), 0 deletions(-)
> 
> diff --git a/block/qed.c b/block/qed.c
> index 3970379..00cf895 100644
> --- a/block/qed.c
> +++ b/block/qed.c
> @@ -263,6 +263,9 @@ static int qed_read_string(BlockDriverState *file, uint64_t offset, size_t n,
>   */
>  static uint64_t qed_alloc_clusters(BDRVQEDState *s, unsigned int n)
>  {
> +    s->file_size = (s->file_size + s->header.cluster_size -1)
> +        / s->header.cluster_size;
> +    s->file_size *= s->header.cluster_size;

This looks a bit simpler:

s->file_size = qed_start_of_cluster(s->file_size +
s->header.cluster_size - 1);

Kevin