Re: [Qemu-devel] [PATCH] qemu-img rebase: Fix for undersized backing files

[Stefan Hajnoczi]

On Wed, Dec 7, 2011 at 11:45 AM, Kevin Wolf <address@hidden> wrote:
> Backing files may be smaller than the corresponding COW file. When
> reading directly from the backing file, qemu-img rebase must consider
> this and assume zero sectors after the end of backing files.
>
> Signed-off-by: Kevin Wolf <address@hidden>
> ---
>  qemu-img.c |   42 +++++++++++++++++++++++++++++++++---------
>  1 files changed, 33 insertions(+), 9 deletions(-)

Reviewed-by: Stefan Hajnoczi <address@hidden>

It almost feels like we want a bdrv_read() variation that does the
zeroing beyond end of image instead of duplicating this.

Stefan