Re: [Qemu-devel] [PATCH v4 11/14] vmdk: Return extent's file in bdrv_get_block_status

[Fam Zheng <famz@redhat.com>]

On Mon, 01/04 21:48, Max Reitz wrote:
> On 24.12.2015 06:50, Fam Zheng wrote:
> > Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
> > Signed-off-by: Fam Zheng <famz@redhat.com>
> > ---
> >  block/vmdk.c | 11 +++++------
> >  1 file changed, 5 insertions(+), 6 deletions(-)
> > 
> > diff --git a/block/vmdk.c b/block/vmdk.c
> > index f5a56fd..b60a5af 100644
> > --- a/block/vmdk.c
> > +++ b/block/vmdk.c
> > @@ -1265,6 +1265,7 @@ static int64_t coroutine_fn vmdk_co_get_block_status(BlockDriverState *bs,
> >                               0, 0);
> >      qemu_co_mutex_unlock(&s->lock);
> >  
> > +    index_in_cluster = vmdk_find_index_in_cluster(extent, sector_num);
> >      switch (ret) {
> >      case VMDK_ERROR:
> >          ret = -EIO;
> > @@ -1276,15 +1277,13 @@ static int64_t coroutine_fn vmdk_co_get_block_status(BlockDriverState *bs,
> >          ret = BDRV_BLOCK_ZERO;
> >          break;
> >      case VMDK_OK:
> > -        ret = BDRV_BLOCK_DATA;
> > -        if (extent->file == bs->file && !extent->compressed) {
> > -            ret |= BDRV_BLOCK_OFFSET_VALID | offset;
> > -        }
> > -
> > +        ret = BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID;
> > +        ret |= (offset + (index_in_cluster << BDRV_SECTOR_BITS))
> > +                & BDRV_BLOCK_OFFSET_MASK;
> > +        *file = extent->file->bs;
> 
> What if the extent is compressed?
> 

You're right, the offset shouldn't be set if compressed. Will fix.

Thanks!

Fam